Merge tag 'usb-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here is the big set of USB patches for 5.4-rc1.

  Two major chunks of code are moving out of the tree and into the
  staging directory, uwb and wusb (wireless USB support), because there
  are no devices that actually use this protocol anymore, and what we
  have today probably doesn't work at all given that the maintainers
  left many many years ago. So move it to staging where it will be
  removed in a few releases if no one screams.

  Other than that, lots of little things. The usual gadget and xhci and
  usb serial driver updates, along with a bunch of sysfs file cleanups
  due to the driver core changes to support that. Nothing really major,
  just constant forward progress.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (159 commits)
  USB: usbcore: Fix slab-out-of-bounds bug during device reset
  usb: cdns3: Remove redundant dev_err call in cdns3_probe()
  USB: rio500: Fix lockdep violation
  USB: rio500: simplify locking
  usb: mtu3: register a USB Role Switch for dual role mode
  usb: common: add USB GPIO based connection detection driver
  usb: common: create Kconfig file
  usb: roles: get usb-role-switch from parent
  usb: roles: Add fwnode_usb_role_switch_get() function
  device connection: Add fwnode_connection_find_match()
  usb: roles: Introduce stubs for the exiting functions in role.h
  dt-bindings: usb: mtu3: add properties about USB Role Switch
  dt-bindings: usb: add binding for USB GPIO based connection detection driver
  dt-bindings: connector: add optional properties for Type-B
  dt-binding: usb: add usb-role-switch property
  usbip: Implement SG support to vhci-hcd and stub driver
  usb: roles: intel: Enable static DRD mode for role switch
  xhci-ext-caps.c: Add property to disable Intel SW switch
  usb: dwc3: remove generic PHY calibrate() calls
  usb: core: phy: add support for PHY calibration
  ...

209 files changed, 9843 insertions, 15414 deletions

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 6e59d370ef81..275568abc670 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -36,8 +36,7 @@ menuconfig USB_SUPPORT
 
 if USB_SUPPORT
 
-config USB_COMMON
-	tristate
+source "drivers/usb/common/Kconfig"
 
 config USB_ARCH_HAS_HCD
 	def_bool y
@@ -98,8 +97,6 @@ source "drivers/usb/core/Kconfig"
 
 source "drivers/usb/mon/Kconfig"
 
-source "drivers/usb/wusbcore/Kconfig"
-
 source "drivers/usb/host/Kconfig"
 
 source "drivers/usb/renesas_usbhs/Kconfig"
@@ -114,6 +111,8 @@ source "drivers/usb/usbip/Kconfig"
 
 endif
 
+source "drivers/usb/cdns3/Kconfig"
+
 source "drivers/usb/mtu3/Kconfig"
 
 source "drivers/usb/musb/Kconfig"
@@ -175,36 +174,4 @@ source "drivers/usb/typec/Kconfig"
 
 source "drivers/usb/roles/Kconfig"
 
-config USB_LED_TRIG
-	bool "USB LED Triggers"
-	depends on LEDS_CLASS && LEDS_TRIGGERS
-	select USB_COMMON
-	help
-	  This option adds LED triggers for USB host and/or gadget activity.
-
-	  Say Y here if you are working on a system with led-class supported
-	  LEDs and you want to use them as activity indicators for USB host or
-	  gadget.
-
-config USB_ULPI_BUS
-	tristate "USB ULPI PHY interface support"
-	select USB_COMMON
-	help
-	  UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
-	  USB 2.0 PHY interface. The ULPI specification defines a standard set
-	  of registers that can be used to detect the vendor and product which
-	  allows ULPI to be handled as a bus. This module is the driver for that
-	  bus.
-
-	  The ULPI interfaces (the buses) are registered by the drivers for USB
-	  controllers which support ULPI register access and have ULPI PHY
-	  attached to them. The ULPI PHY drivers themselves are normal PHY
-	  drivers.
-
-	  ULPI PHYs provide often functions such as ADP sensing/probing (OTG
-	  protocol) and USB charger detection.
-
-	  To compile this driver as a module, choose M here: the module will
-	  be called ulpi.
-
 endif # USB_SUPPORT
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index ecc2de1ffaae..1c1c1d659394 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -13,6 +13,8 @@ obj-$(CONFIG_USB_DWC3)		+= dwc3/
 obj-$(CONFIG_USB_DWC2)		+= dwc2/
 obj-$(CONFIG_USB_ISP1760)	+= isp1760/
 
+obj-$(CONFIG_USB_CDNS3)		+= cdns3/
+
 obj-$(CONFIG_USB_MON)		+= mon/
 obj-$(CONFIG_USB_MTU3)		+= mtu3/
 
@@ -35,8 +37,6 @@ obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
 
 obj-$(CONFIG_USB_C67X00_HCD)	+= c67x00/
 
-obj-$(CONFIG_USB_WUSB)		+= wusbcore/
-
 obj-$(CONFIG_USB_ACM)		+= class/
 obj-$(CONFIG_USB_PRINTER)	+= class/
 obj-$(CONFIG_USB_WDM)		+= class/
diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index e57a2be8754a..5d41f85a7445 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -539,6 +539,37 @@ CXACRU_SET_##_action(                                        adsl_config);
 
 CXACRU_ALL_FILES(INIT);
 
+static struct attribute *cxacru_attrs[] = {
+	&dev_attr_adsl_config.attr,
+	&dev_attr_adsl_state.attr,
+	&dev_attr_adsl_controller_version.attr,
+	&dev_attr_adsl_headend_environment.attr,
+	&dev_attr_adsl_headend.attr,
+	&dev_attr_modulation.attr,
+	&dev_attr_line_startable.attr,
+	&dev_attr_downstream_hec_errors.attr,
+	&dev_attr_upstream_hec_errors.attr,
+	&dev_attr_downstream_fec_errors.attr,
+	&dev_attr_upstream_fec_errors.attr,
+	&dev_attr_downstream_crc_errors.attr,
+	&dev_attr_upstream_crc_errors.attr,
+	&dev_attr_startup_attempts.attr,
+	&dev_attr_downstream_bits_per_frame.attr,
+	&dev_attr_upstream_bits_per_frame.attr,
+	&dev_attr_transmitter_power.attr,
+	&dev_attr_downstream_attenuation.attr,
+	&dev_attr_upstream_attenuation.attr,
+	&dev_attr_downstream_snr_margin.attr,
+	&dev_attr_upstream_snr_margin.attr,
+	&dev_attr_mac_address.attr,
+	&dev_attr_line_status.attr,
+	&dev_attr_link_status.attr,
+	&dev_attr_upstream_rate.attr,
+	&dev_attr_downstream_rate.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(cxacru);
+
 /* the following three functions are stolen from drivers/usb/core/message.c */
 static void cxacru_blocking_completion(struct urb *urb)
 {
@@ -736,17 +767,6 @@ static int cxacru_card_status(struct cxacru_data *instance)
 	return 0;
 }
 
-static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
-		struct atm_dev *atm_dev)
-{
-	struct usb_interface *intf = usbatm_instance->usb_intf;
-
-	#define CXACRU_DEVICE_REMOVE_FILE(_name) \
-		device_remove_file(&intf->dev, &dev_attr_##_name);
-	CXACRU_ALL_FILES(REMOVE);
-	#undef CXACRU_DEVICE_REMOVE_FILE
-}
-
 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 		struct atm_dev *atm_dev)
 {
@@ -765,13 +785,6 @@ static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 		return ret;
 	}
 
-	#define CXACRU_DEVICE_CREATE_FILE(_name) \
-		ret = device_create_file(&intf->dev, &dev_attr_##_name); \
-		if (unlikely(ret)) \
-			goto fail_sysfs;
-	CXACRU_ALL_FILES(CREATE);
-	#undef CXACRU_DEVICE_CREATE_FILE
-
 	/* start ADSL */
 	mutex_lock(&instance->adsl_state_serialize);
 	ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
@@ -804,11 +817,6 @@ static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 	if (start_polling)
 		cxacru_poll_status(&instance->poll_work.work);
 	return 0;
-
-fail_sysfs:
-	usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
-	cxacru_remove_device_files(usbatm_instance, atm_dev);
-	return ret;
 }
 
 static void cxacru_poll_status(struct work_struct *work)
@@ -1332,7 +1340,6 @@ static struct usbatm_driver cxacru_driver = {
 	.heavy_init	= cxacru_heavy_init,
 	.unbind		= cxacru_unbind,
 	.atm_start	= cxacru_atm_start,
-	.atm_stop	= cxacru_remove_device_files,
 	.bulk_in	= CXACRU_EP_DATA,
 	.bulk_out	= CXACRU_EP_DATA,
 	.rx_padding	= 3,
@@ -1364,7 +1371,8 @@ static struct usb_driver cxacru_usb_driver = {
 	.name		= cxacru_driver_name,
 	.probe		= cxacru_usb_probe,
 	.disconnect	= usbatm_usb_disconnect,
-	.id_table	= cxacru_usb_ids
+	.id_table	= cxacru_usb_ids,
+	.dev_groups	= cxacru_groups,
 };
 
 module_usb_driver(cxacru_usb_driver);
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index 8faa51b1a520..8b0ea8c70d73 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -2458,7 +2458,7 @@ static int claim_interface(struct usb_device *usb_dev,
 	return ret;
 }
 
-static struct attribute *attrs[] = {
+static struct attribute *uea_attrs[] = {
 	&dev_attr_stat_status.attr,
 	&dev_attr_stat_mflags.attr,
 	&dev_attr_stat_human_status.attr,
@@ -2479,9 +2479,7 @@ static struct attribute *attrs[] = {
 	&dev_attr_stat_firmid.attr,
 	NULL,
 };
-static const struct attribute_group attr_grp = {
-	.attrs = attrs,
-};
+ATTRIBUTE_GROUPS(uea);
 
 static int uea_bind(struct usbatm_data *usbatm, struct usb_interface *intf,
 		   const struct usb_device_id *id)
@@ -2550,18 +2548,12 @@ static int uea_bind(struct usbatm_data *usbatm, struct usb_interface *intf,
 		}
 	}
 
-	ret = sysfs_create_group(&intf->dev.kobj, &attr_grp);
-	if (ret < 0)
-		goto error;
-
 	ret = uea_boot(sc);
 	if (ret < 0)
-		goto error_rm_grp;
+		goto error;
 
 	return 0;
 
-error_rm_grp:
-	sysfs_remove_group(&intf->dev.kobj, &attr_grp);
 error:
 	kfree(sc);
 	return ret;
@@ -2571,7 +2563,6 @@ static void uea_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
 {
 	struct uea_softc *sc = usbatm->driver_data;
 
-	sysfs_remove_group(&intf->dev.kobj, &attr_grp);
 	uea_stop(sc);
 	kfree(sc);
 }
@@ -2721,6 +2712,7 @@ static struct usb_driver uea_driver = {
 	.id_table = uea_ids,
 	.probe = uea_probe,
 	.disconnect = uea_disconnect,
+	.dev_groups = uea_groups,
 };
 
 MODULE_DEVICE_TABLE(usb, uea_ids);
diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig
new file mode 100644
index 000000000000..d0331613a355
--- /dev/null
+++ b/drivers/usb/cdns3/Kconfig
@@ -0,0 +1,46 @@
+config USB_CDNS3
+	tristate "Cadence USB3 Dual-Role Controller"
+	depends on USB_SUPPORT && (USB || USB_GADGET) && HAS_DMA
+	select USB_XHCI_PLATFORM if USB_XHCI_HCD
+	select USB_ROLE_SWITCH
+	help
+	  Say Y here if your system has a Cadence USB3 dual-role controller.
+	  It supports: dual-role switch, Host-only, and Peripheral-only.
+
+	  If you choose to build this driver is a dynamically linked
+	  as module, the module will be called cdns3.ko.
+
+if USB_CDNS3
+
+config USB_CDNS3_GADGET
+	bool "Cadence USB3 device controller"
+	depends on USB_GADGET=y || USB_GADGET=USB_CDNS3
+	help
+	  Say Y here to enable device controller functionality of the
+	  Cadence USBSS-DEV driver.
+
+	  This controller supports FF, HS and SS mode. It doesn't support
+	  LS and SSP mode.
+
+config USB_CDNS3_HOST
+	bool "Cadence USB3 host controller"
+	depends on USB=y || USB=USB_CDNS3
+	help
+	  Say Y here to enable host controller functionality of the
+	  Cadence driver.
+
+	  Host controller is compliant with XHCI so it will use
+	  standard XHCI driver.
+
+config USB_CDNS3_PCI_WRAP
+	tristate "Cadence USB3 support on PCIe-based platforms"
+	depends on USB_PCI && ACPI
+	default USB_CDNS3
+	help
+	  If you're using the USBSS Core IP with a PCIe, please say
+	  'Y' or 'M' here.
+
+	  If you choose to build this driver as module it will
+	  be dynamically linked and module will be called cdns3-pci.ko
+
+endif
diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
new file mode 100644
index 000000000000..a703547350bb
--- /dev/null
+++ b/drivers/usb/cdns3/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+# define_trace.h needs to know how to find our header
+CFLAGS_trace.o				:= -I$(src)
+
+cdns3-y					:= core.o drd.o
+
+obj-$(CONFIG_USB_CDNS3)			+= cdns3.o
+cdns3-$(CONFIG_USB_CDNS3_GADGET)	+= gadget.o ep0.o
+
+ifneq ($(CONFIG_USB_CDNS3_GADGET),)
+cdns3-$(CONFIG_TRACING)			+= trace.o
+endif
+
+cdns3-$(CONFIG_USB_CDNS3_HOST)		+= host.o
+
+obj-$(CONFIG_USB_CDNS3_PCI_WRAP)	+= cdns3-pci-wrap.o
diff --git a/drivers/usb/cdns3/cdns3-pci-wrap.c b/drivers/usb/cdns3/cdns3-pci-wrap.c
new file mode 100644
index 000000000000..c41ddb61b857
--- /dev/null
+++ b/drivers/usb/cdns3/cdns3-pci-wrap.c
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS PCI Glue driver
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+
+struct cdns3_wrap {
+	struct platform_device *plat_dev;
+	struct resource dev_res[6];
+	int devfn;
+};
+
+#define RES_IRQ_HOST_ID		0
+#define RES_IRQ_PERIPHERAL_ID	1
+#define RES_IRQ_OTG_ID		2
+#define RES_HOST_ID		3
+#define RES_DEV_ID		4
+#define RES_DRD_ID		5
+
+#define PCI_BAR_HOST		0
+#define PCI_BAR_DEV		2
+#define PCI_BAR_OTG		0
+
+#define PCI_DEV_FN_HOST_DEVICE	0
+#define PCI_DEV_FN_OTG		1
+
+#define PCI_DRIVER_NAME		"cdns3-pci-usbss"
+#define PLAT_DRIVER_NAME	"cdns-usb3"
+
+#define CDNS_VENDOR_ID		0x17cd
+#define CDNS_DEVICE_ID		0x0100
+
+static struct pci_dev *cdns3_get_second_fun(struct pci_dev *pdev)
+{
+	struct pci_dev *func;
+
+	/*
+	 * Gets the second function.
+	 * It's little tricky, but this platform has two function.
+	 * The fist keeps resources for Host/Device while the second
+	 * keeps resources for DRD/OTG.
+	 */
+	func = pci_get_device(pdev->vendor, pdev->device, NULL);
+	if (unlikely(!func))
+		return NULL;
+
+	if (func->devfn == pdev->devfn) {
+		func = pci_get_device(pdev->vendor, pdev->device, func);
+		if (unlikely(!func))
+			return NULL;
+	}
+
+	return func;
+}
+
+static int cdns3_pci_probe(struct pci_dev *pdev,
+			   const struct pci_device_id *id)
+{
+	struct platform_device_info plat_info;
+	struct cdns3_wrap *wrap;
+	struct resource *res;
+	struct pci_dev *func;
+	int err;
+
+	/*
+	 * for GADGET/HOST PCI (devfn) function number is 0,
+	 * for OTG PCI (devfn) function number is 1
+	 */
+	if (!id || (pdev->devfn != PCI_DEV_FN_HOST_DEVICE &&
+		    pdev->devfn != PCI_DEV_FN_OTG))
+		return -EINVAL;
+
+	func = cdns3_get_second_fun(pdev);
+	if (unlikely(!func))
+		return -EINVAL;
+
+	err = pcim_enable_device(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", err);
+		return err;
+	}
+
+	pci_set_master(pdev);
+
+	if (pci_is_enabled(func)) {
+		wrap = pci_get_drvdata(func);
+	} else {
+		wrap = kzalloc(sizeof(*wrap), GFP_KERNEL);
+		if (!wrap) {
+			pci_disable_device(pdev);
+			return -ENOMEM;
+		}
+	}
+
+	res = wrap->dev_res;
+
+	if (pdev->devfn == PCI_DEV_FN_HOST_DEVICE) {
+		/* function 0: host(BAR_0) + device(BAR_1).*/
+		dev_dbg(&pdev->dev, "Initialize Device resources\n");
+		res[RES_DEV_ID].start = pci_resource_start(pdev, PCI_BAR_DEV);
+		res[RES_DEV_ID].end =   pci_resource_end(pdev, PCI_BAR_DEV);
+		res[RES_DEV_ID].name = "dev";
+		res[RES_DEV_ID].flags = IORESOURCE_MEM;
+		dev_dbg(&pdev->dev, "USBSS-DEV physical base addr: %pa\n",
+			&res[RES_DEV_ID].start);
+
+		res[RES_HOST_ID].start = pci_resource_start(pdev, PCI_BAR_HOST);
+		res[RES_HOST_ID].end = pci_resource_end(pdev, PCI_BAR_HOST);
+		res[RES_HOST_ID].name = "xhci";
+		res[RES_HOST_ID].flags = IORESOURCE_MEM;
+		dev_dbg(&pdev->dev, "USBSS-XHCI physical base addr: %pa\n",
+			&res[RES_HOST_ID].start);
+
+		/* Interrupt for XHCI */
+		wrap->dev_res[RES_IRQ_HOST_ID].start = pdev->irq;
+		wrap->dev_res[RES_IRQ_HOST_ID].name = "host";
+		wrap->dev_res[RES_IRQ_HOST_ID].flags = IORESOURCE_IRQ;
+
+		/* Interrupt device. It's the same as for HOST. */
+		wrap->dev_res[RES_IRQ_PERIPHERAL_ID].start = pdev->irq;
+		wrap->dev_res[RES_IRQ_PERIPHERAL_ID].name = "peripheral";
+		wrap->dev_res[RES_IRQ_PERIPHERAL_ID].flags = IORESOURCE_IRQ;
+	} else {
+		res[RES_DRD_ID].start = pci_resource_start(pdev, PCI_BAR_OTG);
+		res[RES_DRD_ID].end =   pci_resource_end(pdev, PCI_BAR_OTG);
+		res[RES_DRD_ID].name = "otg";
+		res[RES_DRD_ID].flags = IORESOURCE_MEM;
+		dev_dbg(&pdev->dev, "USBSS-DRD physical base addr: %pa\n",
+			&res[RES_DRD_ID].start);
+
+		/* Interrupt for OTG/DRD. */
+		wrap->dev_res[RES_IRQ_OTG_ID].start = pdev->irq;
+		wrap->dev_res[RES_IRQ_OTG_ID].name = "otg";
+		wrap->dev_res[RES_IRQ_OTG_ID].flags = IORESOURCE_IRQ;
+	}
+
+	if (pci_is_enabled(func)) {
+		/* set up platform device info */
+		memset(&plat_info, 0, sizeof(plat_info));
+		plat_info.parent = &pdev->dev;
+		plat_info.fwnode = pdev->dev.fwnode;
+		plat_info.name = PLAT_DRIVER_NAME;
+		plat_info.id = pdev->devfn;
+		wrap->devfn  = pdev->devfn;
+		plat_info.res = wrap->dev_res;
+		plat_info.num_res = ARRAY_SIZE(wrap->dev_res);
+		plat_info.dma_mask = pdev->dma_mask;
+		/* register platform device */
+		wrap->plat_dev = platform_device_register_full(&plat_info);
+		if (IS_ERR(wrap->plat_dev)) {
+			pci_disable_device(pdev);
+			kfree(wrap);
+			return PTR_ERR(wrap->plat_dev);
+		}
+	}
+
+	pci_set_drvdata(pdev, wrap);
+	return err;
+}
+
+static void cdns3_pci_remove(struct pci_dev *pdev)
+{
+	struct cdns3_wrap *wrap;
+	struct pci_dev *func;
+
+	func = cdns3_get_second_fun(pdev);
+
+	wrap = (struct cdns3_wrap *)pci_get_drvdata(pdev);
+	if (wrap->devfn == pdev->devfn)
+		platform_device_unregister(wrap->plat_dev);
+
+	if (!pci_is_enabled(func))
+		kfree(wrap);
+}
+
+static const struct pci_device_id cdns3_pci_ids[] = {
+	{ PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
+	{ 0, }
+};
+
+static struct pci_driver cdns3_pci_driver = {
+	.name = PCI_DRIVER_NAME,
+	.id_table = cdns3_pci_ids,
+	.probe = cdns3_pci_probe,
+	.remove = cdns3_pci_remove,
+};
+
+module_pci_driver(cdns3_pci_driver);
+MODULE_DEVICE_TABLE(pci, cdns3_pci_ids);
+
+MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Cadence USBSS PCI wrapperr");
diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
new file mode 100644
index 000000000000..06f1e105be4e
--- /dev/null
+++ b/drivers/usb/cdns3/core.c
@@ -0,0 +1,651 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS DRD Driver.
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ * Copyright (C) 2017-2018 NXP
+ * Copyright (C) 2019 Texas Instruments
+ *
+ * Author: Peter Chen <peter.chen@nxp.com>
+ *         Pawel Laszczak <pawell@cadence.com>
+ *         Roger Quadros <rogerq@ti.com>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+
+#include "gadget.h"
+#include "core.h"
+#include "host-export.h"
+#include "gadget-export.h"
+#include "drd.h"
+
+static int cdns3_idle_init(struct cdns3 *cdns);
+
+static inline
+struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)
+{
+	WARN_ON(!cdns->roles[cdns->role]);
+	return cdns->roles[cdns->role];
+}
+
+static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role)
+{
+	int ret;
+
+	if (WARN_ON(role > USB_ROLE_DEVICE))
+		return 0;
+
+	mutex_lock(&cdns->mutex);
+	cdns->role = role;
+	mutex_unlock(&cdns->mutex);
+
+	if (!cdns->roles[role])
+		return -ENXIO;
+
+	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_ACTIVE)
+		return 0;
+
+	mutex_lock(&cdns->mutex);
+	ret = cdns->roles[role]->start(cdns);
+	if (!ret)
+		cdns->roles[role]->state = CDNS3_ROLE_STATE_ACTIVE;
+	mutex_unlock(&cdns->mutex);
+
+	return ret;
+}
+
+static void cdns3_role_stop(struct cdns3 *cdns)
+{
+	enum usb_role role = cdns->role;
+
+	if (WARN_ON(role > USB_ROLE_DEVICE))
+		return;
+
+	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_INACTIVE)
+		return;
+
+	mutex_lock(&cdns->mutex);
+	cdns->roles[role]->stop(cdns);
+	cdns->roles[role]->state = CDNS3_ROLE_STATE_INACTIVE;
+	mutex_unlock(&cdns->mutex);
+}
+
+static void cdns3_exit_roles(struct cdns3 *cdns)
+{
+	cdns3_role_stop(cdns);
+	cdns3_drd_exit(cdns);
+}
+
+static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns);
+
+/**
+ * cdns3_core_init_role - initialize role of operation
+ * @cdns: Pointer to cdns3 structure
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+static int cdns3_core_init_role(struct cdns3 *cdns)
+{
+	struct device *dev = cdns->dev;
+	enum usb_dr_mode best_dr_mode;
+	enum usb_dr_mode dr_mode;
+	int ret = 0;
+
+	dr_mode = usb_get_dr_mode(dev);
+	cdns->role = USB_ROLE_NONE;
+
+	/*
+	 * If driver can't read mode by means of usb_get_dr_mode function then
+	 * chooses mode according with Kernel configuration. This setting
+	 * can be restricted later depending on strap pin configuration.
+	 */
+	if (dr_mode == USB_DR_MODE_UNKNOWN) {
+		if (IS_ENABLED(CONFIG_USB_CDNS3_HOST) &&
+		    IS_ENABLED(CONFIG_USB_CDNS3_GADGET))
+			dr_mode = USB_DR_MODE_OTG;
+		else if (IS_ENABLED(CONFIG_USB_CDNS3_HOST))
+			dr_mode = USB_DR_MODE_HOST;
+		else if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET))
+			dr_mode = USB_DR_MODE_PERIPHERAL;
+	}
+
+	/*
+	 * At this point cdns->dr_mode contains strap configuration.
+	 * Driver try update this setting considering kernel configuration
+	 */
+	best_dr_mode = cdns->dr_mode;
+
+	ret = cdns3_idle_init(cdns);
+	if (ret)
+		return ret;
+
+	if (dr_mode == USB_DR_MODE_OTG) {
+		best_dr_mode = cdns->dr_mode;
+	} else if (cdns->dr_mode == USB_DR_MODE_OTG) {
+		best_dr_mode = dr_mode;
+	} else if (cdns->dr_mode != dr_mode) {
+		dev_err(dev, "Incorrect DRD configuration\n");
+		return -EINVAL;
+	}
+
+	dr_mode = best_dr_mode;
+
+	if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
+		ret = cdns3_host_init(cdns);
+		if (ret) {
+			dev_err(dev, "Host initialization failed with %d\n",
+				ret);
+			goto err;
+		}
+	}
+
+	if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
+		ret = cdns3_gadget_init(cdns);
+		if (ret) {
+			dev_err(dev, "Device initialization failed with %d\n",
+				ret);
+			goto err;
+		}
+	}
+
+	cdns->dr_mode = dr_mode;
+
+	ret = cdns3_drd_update_mode(cdns);
+	if (ret)
+		goto err;
+
+	if (cdns->dr_mode != USB_DR_MODE_OTG) {
+		ret = cdns3_hw_role_switch(cdns);
+		if (ret)
+			goto err;
+	}
+
+	return ret;
+err:
+	cdns3_exit_roles(cdns);
+	return ret;
+}
+
+/**
+ * cdsn3_hw_role_state_machine  - role switch state machine based on hw events.
+ * @cdns: Pointer to controller structure.
+ *
+ * Returns next role to be entered based on hw events.
+ */
+static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns)
+{
+	enum usb_role role;
+	int id, vbus;
+
+	if (cdns->dr_mode != USB_DR_MODE_OTG)
+		goto not_otg;
+
+	id = cdns3_get_id(cdns);
+	vbus = cdns3_get_vbus(cdns);
+
+	/*
+	 * Role change state machine
+	 * Inputs: ID, VBUS
+	 * Previous state: cdns->role
+	 * Next state: role
+	 */
+	role = cdns->role;
+
+	switch (role) {
+	case USB_ROLE_NONE:
+		/*
+		 * Driver treats USB_ROLE_NONE synonymous to IDLE state from
+		 * controller specification.
+		 */
+		if (!id)
+			role = USB_ROLE_HOST;
+		else if (vbus)
+			role = USB_ROLE_DEVICE;
+		break;
+	case USB_ROLE_HOST: /* from HOST, we can only change to NONE */
+		if (id)
+			role = USB_ROLE_NONE;
+		break;
+	case USB_ROLE_DEVICE: /* from GADGET, we can only change to NONE*/
+		if (!vbus)
+			role = USB_ROLE_NONE;
+		break;
+	}
+
+	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);
+
+	return role;
+
+not_otg:
+	if (cdns3_is_host(cdns))
+		role = USB_ROLE_HOST;
+	if (cdns3_is_device(cdns))
+		role = USB_ROLE_DEVICE;
+
+	return role;
+}
+
+static int cdns3_idle_role_start(struct cdns3 *cdns)
+{
+	return 0;
+}
+
+static void cdns3_idle_role_stop(struct cdns3 *cdns)
+{
+	/* Program Lane swap and bring PHY out of RESET */
+	phy_reset(cdns->usb3_phy);
+}
+
+static int cdns3_idle_init(struct cdns3 *cdns)
+{
+	struct cdns3_role_driver *rdrv;
+
+	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
+	if (!rdrv)
+		return -ENOMEM;
+
+	rdrv->start = cdns3_idle_role_start;
+	rdrv->stop = cdns3_idle_role_stop;
+	rdrv->state = CDNS3_ROLE_STATE_INACTIVE;
+	rdrv->suspend = NULL;
+	rdrv->resume = NULL;
+	rdrv->name = "idle";
+
+	cdns->roles[USB_ROLE_NONE] = rdrv;
+
+	return 0;
+}
+
+/**
+ * cdns3_hw_role_switch - switch roles based on HW state
+ * @cdns3: controller
+ */
+int cdns3_hw_role_switch(struct cdns3 *cdns)
+{
+	enum usb_role real_role, current_role;
+	int ret = 0;
+
+	/* Do nothing if role based on syfs. */
+	if (cdns->role_override)
+		return 0;
+
+	pm_runtime_get_sync(cdns->dev);
+
+	current_role = cdns->role;
+	real_role = cdsn3_hw_role_state_machine(cdns);
+
+	/* Do nothing if nothing changed */
+	if (current_role == real_role)
+		goto exit;
+
+	cdns3_role_stop(cdns);
+
+	dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role);
+
+	ret = cdns3_role_start(cdns, real_role);
+	if (ret) {
+		/* Back to current role */
+		dev_err(cdns->dev, "set %d has failed, back to %d\n",
+			real_role, current_role);
+		ret = cdns3_role_start(cdns, current_role);
+		if (ret)
+			dev_err(cdns->dev, "back to %d failed too\n",
+				current_role);
+	}
+exit:
+	pm_runtime_put_sync(cdns->dev);
+	return ret;
+}
+
+/**
+ * cdsn3_role_get - get current role of controller.
+ *
+ * @dev: Pointer to device structure
+ *
+ * Returns role
+ */
+static enum usb_role cdns3_role_get(struct device *dev)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+
+	return cdns->role;
+}
+
+/**
+ * cdns3_role_set - set current role of controller.
+ *
+ * @dev: pointer to device object
+ * @role - the previous role
+ * Handles below events:
+ * - Role switch for dual-role devices
+ * - USB_ROLE_GADGET <--> USB_ROLE_NONE for peripheral-only devices
+ */
+static int cdns3_role_set(struct device *dev, enum usb_role role)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+	int ret = 0;
+
+	pm_runtime_get_sync(cdns->dev);
+
+	/*
+	 * FIXME: switch role framework should be extended to meet
+	 * requirements. Driver assumes that role can be controlled
+	 * by SW or HW. Temporary workaround is to use USB_ROLE_NONE to
+	 * switch from SW to HW control.
+	 *
+	 * For dr_mode == USB_DR_MODE_OTG:
+	 *	if user sets USB_ROLE_HOST or USB_ROLE_DEVICE then driver
+	 *	sets role_override flag and forces that role.
+	 *	if user sets USB_ROLE_NONE, driver clears role_override and lets
+	 *	HW state machine take over.
+	 *
+	 * For dr_mode != USB_DR_MODE_OTG:
+	 *	Assumptions:
+	 *	1. Restricted user control between NONE and dr_mode.
+	 *	2. Driver doesn't need to rely on role_override flag.
+	 *	3. Driver needs to ensure that HW state machine is never called
+	 *	   if dr_mode != USB_DR_MODE_OTG.
+	 */
+	if (role == USB_ROLE_NONE)
+		cdns->role_override = 0;
+	else
+		cdns->role_override = 1;
+
+	/*
+	 * HW state might have changed so driver need to trigger
+	 * HW state machine if dr_mode == USB_DR_MODE_OTG.
+	 */
+	if (!cdns->role_override && cdns->dr_mode == USB_DR_MODE_OTG) {
+		cdns3_hw_role_switch(cdns);
+		goto pm_put;
+	}
+
+	if (cdns->role == role)
+		goto pm_put;
+
+	if (cdns->dr_mode == USB_DR_MODE_HOST) {
+		switch (role) {
+		case USB_ROLE_NONE:
+		case USB_ROLE_HOST:
+			break;
+		default:
+			ret = -EPERM;
+			goto pm_put;
+		}
+	}
+
+	if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL) {
+		switch (role) {
+		case USB_ROLE_NONE:
+		case USB_ROLE_DEVICE:
+			break;
+		default:
+			ret = -EPERM;
+			goto pm_put;
+		}
+	}
+
+	cdns3_role_stop(cdns);
+	ret = cdns3_role_start(cdns, role);
+	if (ret) {
+		dev_err(cdns->dev, "set role %d has failed\n", role);
+		ret = -EPERM;
+	}
+
+pm_put:
+	pm_runtime_put_sync(cdns->dev);
+	return ret;
+}
+
+static const struct usb_role_switch_desc cdns3_switch_desc = {
+	.set = cdns3_role_set,
+	.get = cdns3_role_get,
+	.allow_userspace_control = true,
+};
+
+/**
+ * cdns3_probe - probe for cdns3 core device
+ * @pdev: Pointer to cdns3 core platform device
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+static int cdns3_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource	*res;
+	struct cdns3 *cdns;
+	void __iomem *regs;
+	int ret;
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(dev, "error setting dma mask: %d\n", ret);
+		return -ENODEV;
+	}
+
+	cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
+	if (!cdns)
+		return -ENOMEM;
+
+	cdns->dev = dev;
+
+	platform_set_drvdata(pdev, cdns);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
+	if (!res) {
+		dev_err(dev, "missing host IRQ\n");
+		return -ENODEV;
+	}
+
+	cdns->xhci_res[0] = *res;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
+	if (!res) {
+		dev_err(dev, "couldn't get xhci resource\n");
+		return -ENXIO;
+	}
+
+	cdns->xhci_res[1] = *res;
+
+	cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
+	if (cdns->dev_irq == -EPROBE_DEFER)
+		return cdns->dev_irq;
+
+	if (cdns->dev_irq < 0)
+		dev_err(dev, "couldn't get peripheral irq\n");
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dev");
+	regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+	cdns->dev_regs	= regs;
+
+	cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
+	if (cdns->otg_irq == -EPROBE_DEFER)
+		return cdns->otg_irq;
+
+	if (cdns->otg_irq < 0) {
+		dev_err(dev, "couldn't get otg irq\n");
+		return cdns->otg_irq;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg");
+	if (!res) {
+		dev_err(dev, "couldn't get otg resource\n");
+		return -ENXIO;
+	}
+
+	cdns->otg_res = *res;
+
+	mutex_init(&cdns->mutex);
+
+	cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");
+	if (IS_ERR(cdns->usb2_phy))
+		return PTR_ERR(cdns->usb2_phy);
+
+	ret = phy_init(cdns->usb2_phy);
+	if (ret)
+		return ret;
+
+	cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");
+	if (IS_ERR(cdns->usb3_phy))
+		return PTR_ERR(cdns->usb3_phy);
+
+	ret = phy_init(cdns->usb3_phy);
+	if (ret)
+		goto err1;
+
+	ret = phy_power_on(cdns->usb2_phy);
+	if (ret)
+		goto err2;
+
+	ret = phy_power_on(cdns->usb3_phy);
+	if (ret)
+		goto err3;
+
+	cdns->role_sw = usb_role_switch_register(dev, &cdns3_switch_desc);
+	if (IS_ERR(cdns->role_sw)) {
+		ret = PTR_ERR(cdns->role_sw);
+		dev_warn(dev, "Unable to register Role Switch\n");
+		goto err4;
+	}
+
+	ret = cdns3_drd_init(cdns);
+	if (ret)
+		goto err5;
+
+	ret = cdns3_core_init_role(cdns);
+	if (ret)
+		goto err5;
+
+	device_set_wakeup_capable(dev, true);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	/*
+	 * The controller needs less time between bus and controller suspend,
+	 * and we also needs a small delay to avoid frequently entering low
+	 * power mode.
+	 */
+	pm_runtime_set_autosuspend_delay(dev, 20);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_use_autosuspend(dev);
+	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
+
+	return 0;
+err5:
+	cdns3_drd_exit(cdns);
+	usb_role_switch_unregister(cdns->role_sw);
+err4:
+	phy_power_off(cdns->usb3_phy);
+
+err3:
+	phy_power_off(cdns->usb2_phy);
+err2:
+	phy_exit(cdns->usb3_phy);
+err1:
+	phy_exit(cdns->usb2_phy);
+
+	return ret;
+}
+
+/**
+ * cdns3_remove - unbind drd driver and clean up
+ * @pdev: Pointer to Linux platform device
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+static int cdns3_remove(struct platform_device *pdev)
+{
+	struct cdns3 *cdns = platform_get_drvdata(pdev);
+
+	pm_runtime_get_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+	cdns3_exit_roles(cdns);
+	usb_role_switch_unregister(cdns->role_sw);
+	phy_power_off(cdns->usb2_phy);
+	phy_power_off(cdns->usb3_phy);
+	phy_exit(cdns->usb2_phy);
+	phy_exit(cdns->usb3_phy);
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int cdns3_suspend(struct device *dev)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+	unsigned long flags;
+
+	if (cdns->role == USB_ROLE_HOST)
+		return 0;
+
+	if (pm_runtime_status_suspended(dev))
+		pm_runtime_resume(dev);
+
+	if (cdns->roles[cdns->role]->suspend) {
+		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
+		cdns->roles[cdns->role]->suspend(cdns, false);
+		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
+	}
+
+	return 0;
+}
+
+static int cdns3_resume(struct device *dev)
+{
+	struct cdns3 *cdns = dev_get_drvdata(dev);
+	unsigned long flags;
+
+	if (cdns->role == USB_ROLE_HOST)
+		return 0;
+
+	if (cdns->roles[cdns->role]->resume) {
+		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);
+		cdns->roles[cdns->role]->resume(cdns, false);
+		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);
+	}
+
+	pm_runtime_disable(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops cdns3_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(cdns3_suspend, cdns3_resume)
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_cdns3_match[] = {
+	{ .compatible = "cdns,usb3" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_cdns3_match);
+#endif
+
+static struct platform_driver cdns3_driver = {
+	.probe		= cdns3_probe,
+	.remove		= cdns3_remove,
+	.driver		= {
+		.name	= "cdns-usb3",
+		.of_match_table	= of_match_ptr(of_cdns3_match),
+		.pm	= &cdns3_pm_ops,
+	},
+};
+
+module_platform_driver(cdns3_driver);
+
+MODULE_ALIAS("platform:cdns3");
+MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
new file mode 100644
index 000000000000..969eb94de204
--- /dev/null
+++ b/drivers/usb/cdns3/core.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USBSS DRD Header File.
+ *
+ * Copyright (C) 2017-2018 NXP
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Authors: Peter Chen <peter.chen@nxp.com>
+ *          Pawel Laszczak <pawell@cadence.com>
+ */
+#include <linux/usb/otg.h>
+#include <linux/usb/role.h>
+
+#ifndef __LINUX_CDNS3_CORE_H
+#define __LINUX_CDNS3_CORE_H
+
+struct cdns3;
+
+/**
+ * struct cdns3_role_driver - host/gadget role driver
+ * @start: start this role
+ * @stop: stop this role
+ * @suspend: suspend callback for this role
+ * @resume: resume callback for this role
+ * @irq: irq handler for this role
+ * @name: role name string (host/gadget)
+ * @state: current state
+ */
+struct cdns3_role_driver {
+	int (*start)(struct cdns3 *cdns);
+	void (*stop)(struct cdns3 *cdns);
+	int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
+	int (*resume)(struct cdns3 *cdns, bool hibernated);
+	const char *name;
+#define CDNS3_ROLE_STATE_INACTIVE	0
+#define CDNS3_ROLE_STATE_ACTIVE		1
+	int state;
+};
+
+#define CDNS3_XHCI_RESOURCES_NUM	2
+/**
+ * struct cdns3 - Representation of Cadence USB3 DRD controller.
+ * @dev: pointer to Cadence device struct
+ * @xhci_regs: pointer to base of xhci registers
+ * @xhci_res: the resource for xhci
+ * @dev_regs: pointer to base of dev registers
+ * @otg_res: the resource for otg
+ * @otg_v0_regs: pointer to base of v0 otg registers
+ * @otg_v1_regs: pointer to base of v1 otg registers
+ * @otg_regs: pointer to base of otg registers
+ * @otg_irq: irq number for otg controller
+ * @dev_irq: irq number for device controller
+ * @roles: array of supported roles for this controller
+ * @role: current role
+ * @host_dev: the child host device pointer for cdns3 core
+ * @gadget_dev: the child gadget device pointer for cdns3 core
+ * @usb2_phy: pointer to USB2 PHY
+ * @usb3_phy: pointer to USB3 PHY
+ * @mutex: the mutex for concurrent code at driver
+ * @dr_mode: supported mode of operation it can be only Host, only Device
+ *           or OTG mode that allow to switch between Device and Host mode.
+ *           This field based on firmware setting, kernel configuration
+ *           and hardware configuration.
+ * @role_sw: pointer to role switch object.
+ * @role_override: set 1 if role rely on SW.
+ */
+struct cdns3 {
+	struct device			*dev;
+	void __iomem			*xhci_regs;
+	struct resource			xhci_res[CDNS3_XHCI_RESOURCES_NUM];
+	struct cdns3_usb_regs __iomem	*dev_regs;
+
+	struct resource			otg_res;
+	struct cdns3_otg_legacy_regs	*otg_v0_regs;
+	struct cdns3_otg_regs		*otg_v1_regs;
+	struct cdns3_otg_common_regs	*otg_regs;
+#define CDNS3_CONTROLLER_V0	0
+#define CDNS3_CONTROLLER_V1	1
+	u32				version;
+
+	int				otg_irq;
+	int				dev_irq;
+	struct cdns3_role_driver	*roles[USB_ROLE_DEVICE + 1];
+	enum usb_role			role;
+	struct platform_device		*host_dev;
+	struct cdns3_device		*gadget_dev;
+	struct phy			*usb2_phy;
+	struct phy			*usb3_phy;
+	/* mutext used in workqueue*/
+	struct mutex			mutex;
+	enum usb_dr_mode		dr_mode;
+	struct usb_role_switch		*role_sw;
+	int				role_override;
+};
+
+int cdns3_hw_role_switch(struct cdns3 *cdns);
+
+#endif /* __LINUX_CDNS3_CORE_H */
diff --git a/drivers/usb/cdns3/debug.h b/drivers/usb/cdns3/debug.h
new file mode 100644
index 000000000000..2c9afbfe988b
--- /dev/null
+++ b/drivers/usb/cdns3/debug.h
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USBSS DRD Driver.
+ * Debug header file.
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+#ifndef __LINUX_CDNS3_DEBUG
+#define __LINUX_CDNS3_DEBUG
+
+#include "core.h"
+
+static inline char *cdns3_decode_usb_irq(char *str,
+					 enum usb_device_speed speed,
+					 u32 usb_ists)
+{
+	int ret;
+
+	ret = sprintf(str, "IRQ %08x = ", usb_ists);
+
+	if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
+		ret += sprintf(str + ret, "Connection %s\n",
+			       usb_speed_string(speed));
+	}
+	if (usb_ists & USB_ISTS_DIS2I || usb_ists & USB_ISTS_DISI)
+		ret += sprintf(str + ret, "Disconnection ");
+	if (usb_ists & USB_ISTS_L2ENTI)
+		ret += sprintf(str + ret, "suspended ");
+	if (usb_ists & USB_ISTS_L1ENTI)
+		ret += sprintf(str + ret, "L1 enter ");
+	if (usb_ists & USB_ISTS_L1EXTI)
+		ret += sprintf(str + ret, "L1 exit ");
+	if (usb_ists & USB_ISTS_L2ENTI)
+		ret += sprintf(str + ret, "L2 enter ");
+	if (usb_ists & USB_ISTS_L2EXTI)
+		ret += sprintf(str + ret, "L2 exit ");
+	if (usb_ists & USB_ISTS_U3EXTI)
+		ret += sprintf(str + ret, "U3 exit ");
+	if (usb_ists & USB_ISTS_UWRESI)
+		ret += sprintf(str + ret, "Warm Reset ");
+	if (usb_ists & USB_ISTS_UHRESI)
+		ret += sprintf(str + ret, "Hot Reset ");
+	if (usb_ists & USB_ISTS_U2RESI)
+		ret += sprintf(str + ret, "Reset");
+
+	return str;
+}
+
+static inline  char *cdns3_decode_ep_irq(char *str,
+					 u32 ep_sts,
+					 const char *ep_name)
+{
+	int ret;
+
+	ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts);
+
+	if (ep_sts & EP_STS_SETUP)
+		ret += sprintf(str + ret, "SETUP ");
+	if (ep_sts & EP_STS_IOC)
+		ret += sprintf(str + ret, "IOC ");
+	if (ep_sts & EP_STS_ISP)
+		ret += sprintf(str + ret, "ISP ");
+	if (ep_sts & EP_STS_DESCMIS)
+		ret += sprintf(str + ret, "DESCMIS ");
+	if (ep_sts & EP_STS_STREAMR)
+		ret += sprintf(str + ret, "STREAMR ");
+	if (ep_sts & EP_STS_MD_EXIT)
+		ret += sprintf(str + ret, "MD_EXIT ");
+	if (ep_sts & EP_STS_TRBERR)
+		ret += sprintf(str + ret, "TRBERR ");
+	if (ep_sts & EP_STS_NRDY)
+		ret += sprintf(str + ret, "NRDY ");
+	if (ep_sts & EP_STS_PRIME)
+		ret += sprintf(str + ret, "PRIME ");
+	if (ep_sts & EP_STS_SIDERR)
+		ret += sprintf(str + ret, "SIDERRT ");
+	if (ep_sts & EP_STS_OUTSMM)
+		ret += sprintf(str + ret, "OUTSMM ");
+	if (ep_sts & EP_STS_ISOERR)
+		ret += sprintf(str + ret, "ISOERR ");
+	if (ep_sts & EP_STS_IOT)
+		ret += sprintf(str + ret, "IOT ");
+
+	return str;
+}
+
+static inline char *cdns3_decode_epx_irq(char *str,
+					 char *ep_name,
+					 u32 ep_sts)
+{
+	return cdns3_decode_ep_irq(str, ep_sts, ep_name);
+}
+
+static inline char *cdns3_decode_ep0_irq(char *str,
+					 int dir,
+					 u32 ep_sts)
+{
+	return cdns3_decode_ep_irq(str, ep_sts,
+				   dir ? "ep0IN" : "ep0OUT");
+}
+
+/**
+ * Debug a transfer ring.
+ *
+ * Prints out all TRBs in the endpoint ring, even those after the Link TRB.
+ *.
+ */
+static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep,
+				   struct cdns3_trb *ring, char *str)
+{
+	dma_addr_t addr = priv_ep->trb_pool_dma;
+	struct cdns3_trb *trb;
+	int trb_per_sector;
+	int ret = 0;
+	int i;
+
+	trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type);
+
+	trb = &priv_ep->trb_pool[priv_ep->dequeue];
+	ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name);
+
+	ret += sprintf(str + ret,
+		       "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n",
+		       priv_ep->dequeue, trb,
+		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
+
+	trb = &priv_ep->trb_pool[priv_ep->enqueue];
+	ret += sprintf(str + ret,
+		       "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n",
+		       priv_ep->enqueue, trb,
+		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
+
+	ret += sprintf(str + ret,
+		       "\t\tfree trbs: %d, CCS=%d, PCS=%d\n",
+		       priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs);
+
+	if (trb_per_sector > TRBS_PER_SEGMENT)
+		trb_per_sector = TRBS_PER_SEGMENT;
+
+	if (trb_per_sector > TRBS_PER_SEGMENT) {
+		sprintf(str + ret, "\t\tTo big transfer ring %d\n",
+			trb_per_sector);
+		return str;
+	}
+
+	for (i = 0; i < trb_per_sector; ++i) {
+		trb = &ring[i];
+		ret += sprintf(str + ret,
+			"\t\t@%pad %08x %08x %08x\n", &addr,
+			le32_to_cpu(trb->buffer),
+			le32_to_cpu(trb->length),
+			le32_to_cpu(trb->control));
+		addr += sizeof(*trb);
+	}
+
+	return str;
+}
+
+#endif /*__LINUX_CDNS3_DEBUG*/
diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c
new file mode 100644
index 000000000000..16ad485f0b69
--- /dev/null
+++ b/drivers/usb/cdns3/drd.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS DRD Driver.
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ * Copyright (C) 2019 Texas Instruments
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ *         Roger Quadros <rogerq@ti.com>
+ *
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include <linux/usb/otg.h>
+
+#include "gadget.h"
+#include "drd.h"
+#include "core.h"
+
+/**
+ * cdns3_set_mode - change mode of OTG Core
+ * @cdns: pointer to context structure
+ * @mode: selected mode from cdns_role
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode)
+{
+	int ret = 0;
+	u32 reg;
+
+	switch (mode) {
+	case USB_DR_MODE_PERIPHERAL:
+		break;
+	case USB_DR_MODE_HOST:
+		break;
+	case USB_DR_MODE_OTG:
+		dev_dbg(cdns->dev, "Set controller to OTG mode\n");
+		if (cdns->version == CDNS3_CONTROLLER_V1) {
+			reg = readl(&cdns->otg_v1_regs->override);
+			reg |= OVERRIDE_IDPULLUP;
+			writel(reg, &cdns->otg_v1_regs->override);
+		} else {
+			reg = readl(&cdns->otg_v0_regs->ctrl1);
+			reg |= OVERRIDE_IDPULLUP_V0;
+			writel(reg, &cdns->otg_v0_regs->ctrl1);
+		}
+
+		/*
+		 * Hardware specification says: "ID_VALUE must be valid within
+		 * 50ms after idpullup is set to '1" so driver must wait
+		 * 50ms before reading this pin.
+		 */
+		usleep_range(50000, 60000);
+		break;
+	default:
+		dev_err(cdns->dev, "Unsupported mode of operation %d\n", mode);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+int cdns3_get_id(struct cdns3 *cdns)
+{
+	int id;
+
+	id = readl(&cdns->otg_regs->sts) & OTGSTS_ID_VALUE;
+	dev_dbg(cdns->dev, "OTG ID: %d", id);
+
+	return id;
+}
+
+int cdns3_get_vbus(struct cdns3 *cdns)
+{
+	int vbus;
+
+	vbus = !!(readl(&cdns->otg_regs->sts) & OTGSTS_VBUS_VALID);
+	dev_dbg(cdns->dev, "OTG VBUS: %d", vbus);
+
+	return vbus;
+}
+
+int cdns3_is_host(struct cdns3 *cdns)
+{
+	if (cdns->dr_mode == USB_DR_MODE_HOST)
+		return 1;
+	else if (!cdns3_get_id(cdns))
+		return 1;
+
+	return 0;
+}
+
+int cdns3_is_device(struct cdns3 *cdns)
+{
+	if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL)
+		return 1;
+	else if (cdns->dr_mode == USB_DR_MODE_OTG)
+		if (cdns3_get_id(cdns))
+			return 1;
+
+	return 0;
+}
+
+/**
+ * cdns3_otg_disable_irq - Disable all OTG interrupts
+ * @cdns: Pointer to controller context structure
+ */
+static void cdns3_otg_disable_irq(struct cdns3 *cdns)
+{
+	writel(0, &cdns->otg_regs->ien);
+}
+
+/**
+ * cdns3_otg_enable_irq - enable id and sess_valid interrupts
+ * @cdns: Pointer to controller context structure
+ */
+static void cdns3_otg_enable_irq(struct cdns3 *cdns)
+{
+	writel(OTGIEN_ID_CHANGE_INT | OTGIEN_VBUSVALID_RISE_INT |
+	       OTGIEN_VBUSVALID_FALL_INT, &cdns->otg_regs->ien);
+}
+
+/**
+ * cdns3_drd_switch_host - start/stop host
+ * @cdns: Pointer to controller context structure
+ * @on: 1 for start, 0 for stop
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+int cdns3_drd_switch_host(struct cdns3 *cdns, int on)
+{
+	int ret, val;
+	u32 reg = OTGCMD_OTG_DIS;
+
+	/* switch OTG core */
+	if (on) {
+		writel(OTGCMD_HOST_BUS_REQ | reg, &cdns->otg_regs->cmd);
+
+		dev_dbg(cdns->dev, "Waiting till Host mode is turned on\n");
+		ret = readl_poll_timeout_atomic(&cdns->otg_regs->sts, val,
+						val & OTGSTS_XHCI_READY,
+						1, 100000);
+		if (ret) {
+			dev_err(cdns->dev, "timeout waiting for xhci_ready\n");
+			return ret;
+		}
+	} else {
+		writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
+		       OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
+		       &cdns->otg_regs->cmd);
+		/* Waiting till H_IDLE state.*/
+		readl_poll_timeout_atomic(&cdns->otg_regs->state, val,
+					  !(val & OTGSTATE_HOST_STATE_MASK),
+					  1, 2000000);
+	}
+
+	return 0;
+}
+
+/**
+ * cdns3_drd_switch_gadget - start/stop gadget
+ * @cdns: Pointer to controller context structure
+ * @on: 1 for start, 0 for stop
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on)
+{
+	int ret, val;
+	u32 reg = OTGCMD_OTG_DIS;
+
+	/* switch OTG core */
+	if (on) {
+		writel(OTGCMD_DEV_BUS_REQ | reg, &cdns->otg_regs->cmd);
+
+		dev_dbg(cdns->dev, "Waiting till Device mode is turned on\n");
+
+		ret = readl_poll_timeout_atomic(&cdns->otg_regs->sts, val,
+						val & OTGSTS_DEV_READY,
+						1, 100000);
+		if (ret) {
+			dev_err(cdns->dev, "timeout waiting for dev_ready\n");
+			return ret;
+		}
+	} else {
+		/*
+		 * driver should wait at least 10us after disabling Device
+		 * before turning-off Device (DEV_BUS_DROP)
+		 */
+		usleep_range(20, 30);
+		writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP |
+		       OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF,
+		       &cdns->otg_regs->cmd);
+		/* Waiting till DEV_IDLE state.*/
+		readl_poll_timeout_atomic(&cdns->otg_regs->state, val,
+					  !(val & OTGSTATE_DEV_STATE_MASK),
+					  1, 2000000);
+	}
+
+	return 0;
+}
+
+/**
+ * cdns3_init_otg_mode - initialize drd controller
+ * @cdns: Pointer to controller context structure
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+static int cdns3_init_otg_mode(struct cdns3 *cdns)
+{
+	int ret = 0;
+
+	cdns3_otg_disable_irq(cdns);
+	/* clear all interrupts */
+	writel(~0, &cdns->otg_regs->ivect);
+
+	ret = cdns3_set_mode(cdns, USB_DR_MODE_OTG);
+	if (ret)
+		return ret;
+
+	cdns3_otg_enable_irq(cdns);
+	return ret;
+}
+
+/**
+ * cdns3_drd_update_mode - initialize mode of operation
+ * @cdns: Pointer to controller context structure
+ *
+ * Returns 0 on success otherwise negative errno
+ */
+int cdns3_drd_update_mode(struct cdns3 *cdns)
+{
+	int ret = 0;
+
+	switch (cdns->dr_mode) {
+	case USB_DR_MODE_PERIPHERAL:
+		ret = cdns3_set_mode(cdns, USB_DR_MODE_PERIPHERAL);
+		break;
+	case USB_DR_MODE_HOST:
+		ret = cdns3_set_mode(cdns, USB_DR_MODE_HOST);
+		break;
+	case USB_DR_MODE_OTG:
+		ret = cdns3_init_otg_mode(cdns);
+		break;
+	default:
+		dev_err(cdns->dev, "Unsupported mode of operation %d\n",
+			cdns->dr_mode);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static irqreturn_t cdns3_drd_thread_irq(int irq, void *data)
+{
+	struct cdns3 *cdns = data;
+
+	cdns3_hw_role_switch(cdns);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * cdns3_drd_irq - interrupt handler for OTG events
+ *
+ * @irq: irq number for cdns3 core device
+ * @data: structure of cdns3
+ *
+ * Returns IRQ_HANDLED or IRQ_NONE
+ */
+static irqreturn_t cdns3_drd_irq(int irq, void *data)
+{
+	irqreturn_t ret = IRQ_NONE;
+	struct cdns3 *cdns = data;
+	u32 reg;
+
+	if (cdns->dr_mode != USB_DR_MODE_OTG)
+		return ret;
+
+	reg = readl(&cdns->otg_regs->ivect);
+
+	if (!reg)
+		return ret;
+
+	if (reg & OTGIEN_ID_CHANGE_INT) {
+		dev_dbg(cdns->dev, "OTG IRQ: new ID: %d\n",
+			cdns3_get_id(cdns));
+
+		ret = IRQ_WAKE_THREAD;
+	}
+
+	if (reg & (OTGIEN_VBUSVALID_RISE_INT | OTGIEN_VBUSVALID_FALL_INT)) {
+		dev_dbg(cdns->dev, "OTG IRQ: new VBUS: %d\n",
+			cdns3_get_vbus(cdns));
+
+		ret = IRQ_WAKE_THREAD;
+	}
+
+	writel(~0, &cdns->otg_regs->ivect);
+	return ret;
+}
+
+int cdns3_drd_init(struct cdns3 *cdns)
+{
+	void __iomem *regs;
+	int ret = 0;
+	u32 state;
+
+	regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	/* Detection of DRD version. Controller has been released
+	 * in two versions. Both are similar, but they have same changes
+	 * in register maps.
+	 * The first register in old version is command register and it's read
+	 * only, so driver should read 0 from it. On the other hand, in v1
+	 * the first register contains device ID number which is not set to 0.
+	 * Driver uses this fact to detect the proper version of
+	 * controller.
+	 */
+	cdns->otg_v0_regs = regs;
+	if (!readl(&cdns->otg_v0_regs->cmd)) {
+		cdns->version  = CDNS3_CONTROLLER_V0;
+		cdns->otg_v1_regs = NULL;
+		cdns->otg_regs = regs;
+		writel(1, &cdns->otg_v0_regs->simulate);
+		dev_info(cdns->dev, "DRD version v0 (%08x)\n",
+			 readl(&cdns->otg_v0_regs->version));
+	} else {
+		cdns->otg_v0_regs = NULL;
+		cdns->otg_v1_regs = regs;
+		cdns->otg_regs = (void *)&cdns->otg_v1_regs->cmd;
+		cdns->version  = CDNS3_CONTROLLER_V1;
+		writel(1, &cdns->otg_v1_regs->simulate);
+		dev_info(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n",
+			 readl(&cdns->otg_v1_regs->did),
+			 readl(&cdns->otg_v1_regs->rid));
+	}
+
+	state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts));
+
+	/* Update dr_mode according to STRAP configuration. */
+	cdns->dr_mode = USB_DR_MODE_OTG;
+	if (state == OTGSTS_STRAP_HOST) {
+		dev_dbg(cdns->dev, "Controller strapped to HOST\n");
+		cdns->dr_mode = USB_DR_MODE_HOST;
+	} else if (state == OTGSTS_STRAP_GADGET) {
+		dev_dbg(cdns->dev, "Controller strapped to PERIPHERAL\n");
+		cdns->dr_mode = USB_DR_MODE_PERIPHERAL;
+	}
+
+	ret = devm_request_threaded_irq(cdns->dev, cdns->otg_irq,
+					cdns3_drd_irq,
+					cdns3_drd_thread_irq,
+					IRQF_SHARED,
+					dev_name(cdns->dev), cdns);
+
+	if (ret) {
+		dev_err(cdns->dev, "couldn't get otg_irq\n");
+		return ret;
+	}
+
+	state = readl(&cdns->otg_regs->sts);
+	if (OTGSTS_OTG_NRDY(state) != 0) {
+		dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n");
+		return -ENODEV;
+	}
+
+	return ret;
+}
+
+int cdns3_drd_exit(struct cdns3 *cdns)
+{
+	cdns3_otg_disable_irq(cdns);
+	return 0;
+}
diff --git a/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h
new file mode 100644
index 000000000000..04e01c4d2377
--- /dev/null
+++ b/drivers/usb/cdns3/drd.h
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USB3 DRD header file.
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+#ifndef __LINUX_CDNS3_DRD
+#define __LINUX_CDNS3_DRD
+
+#include <linux/usb/otg.h>
+#include <linux/phy/phy.h>
+#include "core.h"
+
+/*  DRD register interface for version v1. */
+struct cdns3_otg_regs {
+	__le32 did;
+	__le32 rid;
+	__le32 capabilities;
+	__le32 reserved1;
+	__le32 cmd;
+	__le32 sts;
+	__le32 state;
+	__le32 reserved2;
+	__le32 ien;
+	__le32 ivect;
+	__le32 refclk;
+	__le32 tmr;
+	__le32 reserved3[4];
+	__le32 simulate;
+	__le32 override;
+	__le32 susp_ctrl;
+	__le32 reserved4;
+	__le32 anasts;
+	__le32 adp_ramp_time;
+	__le32 ctrl1;
+	__le32 ctrl2;
+};
+
+/*  DRD register interface for version v0. */
+struct cdns3_otg_legacy_regs {
+	__le32 cmd;
+	__le32 sts;
+	__le32 state;
+	__le32 refclk;
+	__le32 ien;
+	__le32 ivect;
+	__le32 reserved1[3];
+	__le32 tmr;
+	__le32 reserved2[2];
+	__le32 version;
+	__le32 capabilities;
+	__le32 reserved3[2];
+	__le32 simulate;
+	__le32 reserved4[5];
+	__le32 ctrl1;
+};
+
+/*
+ * Common registers interface for both version of DRD.
+ */
+struct cdns3_otg_common_regs {
+	__le32 cmd;
+	__le32 sts;
+	__le32 state;
+	__le32 different1;
+	__le32 ien;
+	__le32 ivect;
+};
+
+/* CDNS_RID - bitmasks */
+#define CDNS_RID(p)			((p) & GENMASK(15, 0))
+
+/* CDNS_VID - bitmasks */
+#define CDNS_DID(p)			((p) & GENMASK(31, 0))
+
+/* OTGCMD - bitmasks */
+/* "Request the bus for Device mode. */
+#define OTGCMD_DEV_BUS_REQ		BIT(0)
+/* Request the bus for Host mode */
+#define OTGCMD_HOST_BUS_REQ		BIT(1)
+/* Enable OTG mode. */
+#define OTGCMD_OTG_EN			BIT(2)
+/* Disable OTG mode */
+#define OTGCMD_OTG_DIS			BIT(3)
+/*"Configure OTG as A-Device. */
+#define OTGCMD_A_DEV_EN			BIT(4)
+/*"Configure OTG as A-Device. */
+#define OTGCMD_A_DEV_DIS		BIT(5)
+/* Drop the bus for Device mod	e. */
+#define OTGCMD_DEV_BUS_DROP		BIT(8)
+/* Drop the bus for Host mode*/
+#define OTGCMD_HOST_BUS_DROP		BIT(9)
+/* Power Down USBSS-DEV. */
+#define OTGCMD_DEV_POWER_OFF		BIT(11)
+/* Power Down CDNSXHCI. */
+#define OTGCMD_HOST_POWER_OFF		BIT(12)
+
+/* OTGIEN - bitmasks */
+/* ID change interrupt enable */
+#define OTGIEN_ID_CHANGE_INT		BIT(0)
+/* Vbusvalid fall detected interrupt enable.*/
+#define OTGIEN_VBUSVALID_RISE_INT	BIT(4)
+/* Vbusvalid fall detected interrupt enable */
+#define OTGIEN_VBUSVALID_FALL_INT	BIT(5)
+
+/* OTGSTS - bitmasks */
+/*
+ * Current value of the ID pin. It is only valid when idpullup in
+ *  OTGCTRL1_TYPE register is set to '1'.
+ */
+#define OTGSTS_ID_VALUE			BIT(0)
+/* Current value of the vbus_valid */
+#define OTGSTS_VBUS_VALID		BIT(1)
+/* Current value of the b_sess_vld */
+#define OTGSTS_SESSION_VALID		BIT(2)
+/*Device mode is active*/
+#define OTGSTS_DEV_ACTIVE		BIT(3)
+/* Host mode is active. */
+#define OTGSTS_HOST_ACTIVE		BIT(4)
+/* OTG Controller not ready. */
+#define OTGSTS_OTG_NRDY_MASK		BIT(11)
+#define OTGSTS_OTG_NRDY(p)		((p) & OTGSTS_OTG_NRDY_MASK)
+/*
+ * Value of the strap pins.
+ * 000 - no default configuration
+ * 010 - Controller initiall configured as Host
+ * 100 - Controller initially configured as Device
+ */
+#define OTGSTS_STRAP(p)			(((p) & GENMASK(14, 12)) >> 12)
+#define OTGSTS_STRAP_NO_DEFAULT_CFG	0x00
+#define OTGSTS_STRAP_HOST_OTG		0x01
+#define OTGSTS_STRAP_HOST		0x02
+#define OTGSTS_STRAP_GADGET		0x04
+/* Host mode is turned on. */
+#define OTGSTS_XHCI_READY		BIT(26)
+/* "Device mode is turned on .*/
+#define OTGSTS_DEV_READY		BIT(27)
+
+/* OTGSTATE- bitmasks */
+#define OTGSTATE_DEV_STATE_MASK		GENMASK(2, 0)
+#define OTGSTATE_HOST_STATE_MASK	GENMASK(5, 3)
+#define OTGSTATE_HOST_STATE_IDLE	0x0
+#define OTGSTATE_HOST_STATE_VBUS_FALL	0x7
+#define OTGSTATE_HOST_STATE(p)		(((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
+
+/* OTGREFCLK - bitmasks */
+#define OTGREFCLK_STB_CLK_SWITCH_EN	BIT(31)
+
+/* OVERRIDE - bitmasks */
+#define OVERRIDE_IDPULLUP		BIT(0)
+/* Only for CDNS3_CONTROLLER_V0 version */
+#define OVERRIDE_IDPULLUP_V0		BIT(24)
+
+int cdns3_is_host(struct cdns3 *cdns);
+int cdns3_is_device(struct cdns3 *cdns);
+int cdns3_get_id(struct cdns3 *cdns);
+int cdns3_get_vbus(struct cdns3 *cdns);
+int cdns3_drd_init(struct cdns3 *cdns);
+int cdns3_drd_exit(struct cdns3 *cdns);
+int cdns3_drd_update_mode(struct cdns3 *cdns);
+int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on);
+int cdns3_drd_switch_host(struct cdns3 *cdns, int on);
+int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode);
+
+#endif /* __LINUX_CDNS3_DRD */
diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
new file mode 100644
index 000000000000..44f652e8b5a2
--- /dev/null
+++ b/drivers/usb/cdns3/ep0.c
@@ -0,0 +1,886 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS DRD Driver - gadget side.
+ *
+ * Copyright (C) 2018 Cadence Design Systems.
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Pawel Jez <pjez@cadence.com>,
+ *          Pawel Laszczak <pawell@cadence.com>
+ *          Peter Chen <peter.chen@nxp.com>
+ */
+
+#include <linux/usb/composite.h>
+#include <linux/iopoll.h>
+
+#include "gadget.h"
+#include "trace.h"
+
+static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bmAttributes =	USB_ENDPOINT_XFER_CONTROL,
+};
+
+/**
+ * cdns3_ep0_run_transfer - Do transfer on default endpoint hardware
+ * @priv_dev: extended gadget object
+ * @dma_addr: physical address where data is/will be stored
+ * @length: data length
+ * @erdy: set it to 1 when ERDY packet should be sent -
+ *        exit from flow control state
+ */
+static void cdns3_ep0_run_transfer(struct cdns3_device *priv_dev,
+				   dma_addr_t dma_addr,
+				   unsigned int length, int erdy, int zlp)
+{
+	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
+	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
+
+	priv_ep->trb_pool[0].buffer = TRB_BUFFER(dma_addr);
+	priv_ep->trb_pool[0].length = TRB_LEN(length);
+
+	if (zlp) {
+		priv_ep->trb_pool[0].control = TRB_CYCLE | TRB_TYPE(TRB_NORMAL);
+		priv_ep->trb_pool[1].buffer = TRB_BUFFER(dma_addr);
+		priv_ep->trb_pool[1].length = TRB_LEN(0);
+		priv_ep->trb_pool[1].control = TRB_CYCLE | TRB_IOC |
+		    TRB_TYPE(TRB_NORMAL);
+	} else {
+		priv_ep->trb_pool[0].control = TRB_CYCLE | TRB_IOC |
+		    TRB_TYPE(TRB_NORMAL);
+		priv_ep->trb_pool[1].control = 0;
+	}
+
+	trace_cdns3_prepare_trb(priv_ep, priv_ep->trb_pool);
+
+	cdns3_select_ep(priv_dev, priv_dev->ep0_data_dir);
+
+	writel(EP_STS_TRBERR, &regs->ep_sts);
+	writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), &regs->ep_traddr);
+	trace_cdns3_doorbell_ep0(priv_dev->ep0_data_dir ? "ep0in" : "ep0out",
+				 readl(&regs->ep_traddr));
+
+	/* TRB should be prepared before starting transfer. */
+	writel(EP_CMD_DRDY, &regs->ep_cmd);
+
+	/* Resume controller before arming transfer. */
+	__cdns3_gadget_wakeup(priv_dev);
+
+	if (erdy)
+		writel(EP_CMD_ERDY, &priv_dev->regs->ep_cmd);
+}
+
+/**
+ * cdns3_ep0_delegate_req - Returns status of handling setup packet
+ * Setup is handled by gadget driver
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns zero on success or negative value on failure
+ */
+static int cdns3_ep0_delegate_req(struct cdns3_device *priv_dev,
+				  struct usb_ctrlrequest *ctrl_req)
+{
+	int ret;
+
+	spin_unlock(&priv_dev->lock);
+	priv_dev->setup_pending = 1;
+	ret = priv_dev->gadget_driver->setup(&priv_dev->gadget, ctrl_req);
+	priv_dev->setup_pending = 0;
+	spin_lock(&priv_dev->lock);
+	return ret;
+}
+
+static void cdns3_prepare_setup_packet(struct cdns3_device *priv_dev)
+{
+	priv_dev->ep0_data_dir = 0;
+	priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
+	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
+			       sizeof(struct usb_ctrlrequest), 0, 0);
+}
+
+static void cdns3_ep0_complete_setup(struct cdns3_device *priv_dev,
+				     u8 send_stall, u8 send_erdy)
+{
+	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
+	struct usb_request *request;
+
+	request = cdns3_next_request(&priv_ep->pending_req_list);
+	if (request)
+		list_del_init(&request->list);
+
+	if (send_stall) {
+		trace_cdns3_halt(priv_ep, send_stall, 0);
+		/* set_stall on ep0 */
+		cdns3_select_ep(priv_dev, 0x00);
+		writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd);
+	} else {
+		cdns3_prepare_setup_packet(priv_dev);
+	}
+
+	priv_dev->ep0_stage = CDNS3_SETUP_STAGE;
+	writel((send_erdy ? EP_CMD_ERDY : 0) | EP_CMD_REQ_CMPL,
+	       &priv_dev->regs->ep_cmd);
+
+	cdns3_allow_enable_l1(priv_dev, 1);
+}
+
+/**
+ * cdns3_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, USB_GADGET_DELAYED_STATUS on deferred status stage,
+ * error code on error
+ */
+static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev,
+					   struct usb_ctrlrequest *ctrl_req)
+{
+	enum usb_device_state device_state = priv_dev->gadget.state;
+	struct cdns3_endpoint *priv_ep;
+	u32 config = le16_to_cpu(ctrl_req->wValue);
+	int result = 0;
+	int i;
+
+	switch (device_state) {
+	case USB_STATE_ADDRESS:
+		/* Configure non-control EPs */
+		for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
+			priv_ep = priv_dev->eps[i];
+			if (!priv_ep)
+				continue;
+
+			if (priv_ep->flags & EP_CLAIMED)
+				cdns3_ep_config(priv_ep);
+		}
+
+		result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
+
+		if (result)
+			return result;
+
+		if (config) {
+			cdns3_set_hw_configuration(priv_dev);
+		} else {
+			cdns3_hw_reset_eps_config(priv_dev);
+			usb_gadget_set_state(&priv_dev->gadget,
+					     USB_STATE_ADDRESS);
+		}
+		break;
+	case USB_STATE_CONFIGURED:
+		result = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
+
+		if (!config && !result) {
+			cdns3_hw_reset_eps_config(priv_dev);
+			usb_gadget_set_state(&priv_dev->gadget,
+					     USB_STATE_ADDRESS);
+		}
+		break;
+	default:
+		result = -EINVAL;
+	}
+
+	return result;
+}
+
+/**
+ * cdns3_req_ep0_set_address - Handling of SET_ADDRESS standard USB request
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev,
+				     struct usb_ctrlrequest *ctrl_req)
+{
+	enum usb_device_state device_state = priv_dev->gadget.state;
+	u32 reg;
+	u32 addr;
+
+	addr = le16_to_cpu(ctrl_req->wValue);
+
+	if (addr > USB_DEVICE_MAX_ADDRESS) {
+		dev_err(priv_dev->dev,
+			"Device address (%d) cannot be greater than %d\n",
+			addr, USB_DEVICE_MAX_ADDRESS);
+		return -EINVAL;
+	}
+
+	if (device_state == USB_STATE_CONFIGURED) {
+		dev_err(priv_dev->dev,
+			"can't set_address from configured state\n");
+		return -EINVAL;
+	}
+
+	reg = readl(&priv_dev->regs->usb_cmd);
+
+	writel(reg | USB_CMD_FADDR(addr) | USB_CMD_SET_ADDR,
+	       &priv_dev->regs->usb_cmd);
+
+	usb_gadget_set_state(&priv_dev->gadget,
+			     (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT));
+
+	return 0;
+}
+
+/**
+ * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_req_ep0_get_status(struct cdns3_device *priv_dev,
+				    struct usb_ctrlrequest *ctrl)
+{
+	__le16 *response_pkt;
+	u16 usb_status = 0;
+	u32 recip;
+
+	recip = ctrl->bRequestType & USB_RECIP_MASK;
+
+	switch (recip) {
+	case USB_RECIP_DEVICE:
+		/* self powered */
+		if (priv_dev->is_selfpowered)
+			usb_status = BIT(USB_DEVICE_SELF_POWERED);
+
+		if (priv_dev->wake_up_flag)
+			usb_status |= BIT(USB_DEVICE_REMOTE_WAKEUP);
+
+		if (priv_dev->gadget.speed != USB_SPEED_SUPER)
+			break;
+
+		if (priv_dev->u1_allowed)
+			usb_status |= BIT(USB_DEV_STAT_U1_ENABLED);
+
+		if (priv_dev->u2_allowed)
+			usb_status |= BIT(USB_DEV_STAT_U2_ENABLED);
+
+		break;
+	case USB_RECIP_INTERFACE:
+		return cdns3_ep0_delegate_req(priv_dev, ctrl);
+	case USB_RECIP_ENDPOINT:
+		/* check if endpoint is stalled */
+		cdns3_select_ep(priv_dev, ctrl->wIndex);
+		if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)))
+			usb_status =  BIT(USB_ENDPOINT_HALT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	response_pkt = (__le16 *)priv_dev->setup_buf;
+	*response_pkt = cpu_to_le16(usb_status);
+
+	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma,
+			       sizeof(*response_pkt), 1, 0);
+	return 0;
+}
+
+static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev,
+					   struct usb_ctrlrequest *ctrl,
+					   int set)
+{
+	enum usb_device_state state;
+	enum usb_device_speed speed;
+	int ret = 0;
+	u32 wValue;
+	u16 tmode;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+	state = priv_dev->gadget.state;
+	speed = priv_dev->gadget.speed;
+
+	switch (wValue) {
+	case USB_DEVICE_REMOTE_WAKEUP:
+		priv_dev->wake_up_flag = !!set;
+		break;
+	case USB_DEVICE_U1_ENABLE:
+		if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
+			return -EINVAL;
+
+		priv_dev->u1_allowed = !!set;
+		break;
+	case USB_DEVICE_U2_ENABLE:
+		if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER)
+			return -EINVAL;
+
+		priv_dev->u2_allowed = !!set;
+		break;
+	case USB_DEVICE_LTM_ENABLE:
+		ret = -EINVAL;
+		break;
+	case USB_DEVICE_TEST_MODE:
+		if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH)
+			return -EINVAL;
+
+		tmode = le16_to_cpu(ctrl->wIndex);
+
+		if (!set || (tmode & 0xff) != 0)
+			return -EINVAL;
+
+		switch (tmode >> 8) {
+		case TEST_J:
+		case TEST_K:
+		case TEST_SE0_NAK:
+		case TEST_PACKET:
+			cdns3_ep0_complete_setup(priv_dev, 0, 1);
+			/**
+			 *  Little delay to give the controller some time
+			 * for sending status stage.
+			 * This time should be less then 3ms.
+			 */
+			usleep_range(1000, 2000);
+			cdns3_set_register_bit(&priv_dev->regs->usb_cmd,
+					       USB_CMD_STMODE |
+					       USB_STS_TMODE_SEL(tmode - 1));
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdns3_ep0_feature_handle_intf(struct cdns3_device *priv_dev,
+					 struct usb_ctrlrequest *ctrl,
+					 int set)
+{
+	u32 wValue;
+	int ret = 0;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+
+	switch (wValue) {
+	case USB_INTRF_FUNC_SUSPEND:
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev,
+					     struct usb_ctrlrequest *ctrl,
+					     int set)
+{
+	struct cdns3_endpoint *priv_ep;
+	int ret = 0;
+	u8 index;
+
+	if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
+		return -EINVAL;
+
+	if (!(ctrl->wIndex & ~USB_DIR_IN))
+		return 0;
+
+	index = cdns3_ep_addr_to_index(ctrl->wIndex);
+	priv_ep = priv_dev->eps[index];
+
+	cdns3_select_ep(priv_dev, ctrl->wIndex);
+
+	if (set)
+		__cdns3_gadget_ep_set_halt(priv_ep);
+	else if (!(priv_ep->flags & EP_WEDGE))
+		ret = __cdns3_gadget_ep_clear_halt(priv_ep);
+
+	cdns3_select_ep(priv_dev, 0x00);
+
+	return ret;
+}
+
+/**
+ * cdns3_req_ep0_handle_feature -
+ * Handling of GET/SET_FEATURE standard USB request
+ *
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ * @set: must be set to 1 for SET_FEATURE request
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_req_ep0_handle_feature(struct cdns3_device *priv_dev,
+					struct usb_ctrlrequest *ctrl,
+					int set)
+{
+	int ret = 0;
+	u32 recip;
+
+	recip = ctrl->bRequestType & USB_RECIP_MASK;
+
+	switch (recip) {
+	case USB_RECIP_DEVICE:
+		ret = cdns3_ep0_feature_handle_device(priv_dev, ctrl, set);
+		break;
+	case USB_RECIP_INTERFACE:
+		ret = cdns3_ep0_feature_handle_intf(priv_dev, ctrl, set);
+		break;
+	case USB_RECIP_ENDPOINT:
+		ret = cdns3_ep0_feature_handle_endpoint(priv_dev, ctrl, set);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+/**
+ * cdns3_req_ep0_set_sel - Handling of SET_SEL standard USB request
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_req_ep0_set_sel(struct cdns3_device *priv_dev,
+				 struct usb_ctrlrequest *ctrl_req)
+{
+	if (priv_dev->gadget.state < USB_STATE_ADDRESS)
+		return -EINVAL;
+
+	if (ctrl_req->wLength != 6) {
+		dev_err(priv_dev->dev, "Set SEL should be 6 bytes, got %d\n",
+			ctrl_req->wLength);
+		return -EINVAL;
+	}
+
+	cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, 6, 1, 0);
+	return 0;
+}
+
+/**
+ * cdns3_req_ep0_set_isoch_delay -
+ * Handling of GET_ISOCH_DELAY standard USB request
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_req_ep0_set_isoch_delay(struct cdns3_device *priv_dev,
+					 struct usb_ctrlrequest *ctrl_req)
+{
+	if (ctrl_req->wIndex || ctrl_req->wLength)
+		return -EINVAL;
+
+	priv_dev->isoch_delay = ctrl_req->wValue;
+
+	return 0;
+}
+
+/**
+ * cdns3_ep0_standard_request - Handling standard USB requests
+ * @priv_dev: extended gadget object
+ * @ctrl_req: pointer to received setup packet
+ *
+ * Returns 0 if success, error code on error
+ */
+static int cdns3_ep0_standard_request(struct cdns3_device *priv_dev,
+				      struct usb_ctrlrequest *ctrl_req)
+{
+	int ret;
+
+	switch (ctrl_req->bRequest) {
+	case USB_REQ_SET_ADDRESS:
+		ret = cdns3_req_ep0_set_address(priv_dev, ctrl_req);
+		break;
+	case USB_REQ_SET_CONFIGURATION:
+		ret = cdns3_req_ep0_set_configuration(priv_dev, ctrl_req);
+		break;
+	case USB_REQ_GET_STATUS:
+		ret = cdns3_req_ep0_get_status(priv_dev, ctrl_req);
+		break;
+	case USB_REQ_CLEAR_FEATURE:
+		ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 0);
+		break;
+	case USB_REQ_SET_FEATURE:
+		ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 1);
+		break;
+	case USB_REQ_SET_SEL:
+		ret = cdns3_req_ep0_set_sel(priv_dev, ctrl_req);
+		break;
+	case USB_REQ_SET_ISOCH_DELAY:
+		ret = cdns3_req_ep0_set_isoch_delay(priv_dev, ctrl_req);
+		break;
+	default:
+		ret = cdns3_ep0_delegate_req(priv_dev, ctrl_req);
+		break;
+	}
+
+	return ret;
+}
+
+static void __pending_setup_status_handler(struct cdns3_device *priv_dev)
+{
+	struct usb_request *request = priv_dev->pending_status_request;
+
+	if (priv_dev->status_completion_no_call && request &&
+	    request->complete) {
+		request->complete(&priv_dev->eps[0]->endpoint, request);
+		priv_dev->status_completion_no_call = 0;
+	}
+}
+
+void cdns3_pending_setup_status_handler(struct work_struct *work)
+{
+	struct cdns3_device *priv_dev = container_of(work, struct cdns3_device,
+			pending_status_wq);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	__pending_setup_status_handler(priv_dev);
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+}
+
+/**
+ * cdns3_ep0_setup_phase - Handling setup USB requests
+ * @priv_dev: extended gadget object
+ */
+static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev)
+{
+	struct usb_ctrlrequest *ctrl = priv_dev->setup_buf;
+	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
+	int result;
+
+	priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN;
+
+	trace_cdns3_ctrl_req(ctrl);
+
+	if (!list_empty(&priv_ep->pending_req_list)) {
+		struct usb_request *request;
+
+		request = cdns3_next_request(&priv_ep->pending_req_list);
+		priv_ep->dir = priv_dev->ep0_data_dir;
+		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
+				      -ECONNRESET);
+	}
+
+	if (le16_to_cpu(ctrl->wLength))
+		priv_dev->ep0_stage = CDNS3_DATA_STAGE;
+	else
+		priv_dev->ep0_stage = CDNS3_STATUS_STAGE;
+
+	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
+		result = cdns3_ep0_standard_request(priv_dev, ctrl);
+	else
+		result = cdns3_ep0_delegate_req(priv_dev, ctrl);
+
+	if (result == USB_GADGET_DELAYED_STATUS)
+		return;
+
+	if (result < 0)
+		cdns3_ep0_complete_setup(priv_dev, 1, 1);
+	else if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE)
+		cdns3_ep0_complete_setup(priv_dev, 0, 1);
+}
+
+static void cdns3_transfer_completed(struct cdns3_device *priv_dev)
+{
+	struct cdns3_endpoint *priv_ep = priv_dev->eps[0];
+
+	if (!list_empty(&priv_ep->pending_req_list)) {
+		struct usb_request *request;
+
+		trace_cdns3_complete_trb(priv_ep, priv_ep->trb_pool);
+		request = cdns3_next_request(&priv_ep->pending_req_list);
+
+		request->actual =
+			TRB_LEN(le32_to_cpu(priv_ep->trb_pool->length));
+
+		priv_ep->dir = priv_dev->ep0_data_dir;
+		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), 0);
+	}
+
+	cdns3_ep0_complete_setup(priv_dev, 0, 0);
+}
+
+/**
+ * cdns3_check_new_setup - Check if controller receive new SETUP packet.
+ * @priv_dev: extended gadget object
+ *
+ * The SETUP packet can be kept in on-chip memory or in system memory.
+ */
+static bool cdns3_check_new_setup(struct cdns3_device *priv_dev)
+{
+	u32 ep_sts_reg;
+
+	cdns3_select_ep(priv_dev, 0 | USB_DIR_OUT);
+	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
+
+	return !!(ep_sts_reg & (EP_STS_SETUP | EP_STS_STPWAIT));
+}
+
+/**
+ * cdns3_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0
+ * @priv_dev: extended gadget object
+ * @dir: USB_DIR_IN for IN direction, USB_DIR_OUT for OUT direction
+ */
+void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir)
+{
+	u32 ep_sts_reg;
+
+	cdns3_select_ep(priv_dev, dir);
+
+	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
+	writel(ep_sts_reg, &priv_dev->regs->ep_sts);
+
+	trace_cdns3_ep0_irq(priv_dev, ep_sts_reg);
+
+	__pending_setup_status_handler(priv_dev);
+
+	if (ep_sts_reg & EP_STS_SETUP)
+		priv_dev->wait_for_setup = 1;
+
+	if (priv_dev->wait_for_setup && ep_sts_reg & EP_STS_IOC) {
+		priv_dev->wait_for_setup = 0;
+		cdns3_allow_enable_l1(priv_dev, 0);
+		cdns3_ep0_setup_phase(priv_dev);
+	} else if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) {
+		priv_dev->ep0_data_dir = dir;
+		cdns3_transfer_completed(priv_dev);
+	}
+
+	if (ep_sts_reg & EP_STS_DESCMIS) {
+		if (dir == 0 && !priv_dev->setup_pending)
+			cdns3_prepare_setup_packet(priv_dev);
+	}
+}
+
+/**
+ * cdns3_gadget_ep0_enable
+ * Function shouldn't be called by gadget driver,
+ * endpoint 0 is allways active
+ */
+static int cdns3_gadget_ep0_enable(struct usb_ep *ep,
+				   const struct usb_endpoint_descriptor *desc)
+{
+	return -EINVAL;
+}
+
+/**
+ * cdns3_gadget_ep0_disable
+ * Function shouldn't be called by gadget driver,
+ * endpoint 0 is allways active
+ */
+static int cdns3_gadget_ep0_disable(struct usb_ep *ep)
+{
+	return -EINVAL;
+}
+
+/**
+ * cdns3_gadget_ep0_set_halt
+ * @ep: pointer to endpoint zero object
+ * @value: 1 for set stall, 0 for clear stall
+ *
+ * Returns 0
+ */
+static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
+{
+	/* TODO */
+	return 0;
+}
+
+/**
+ * cdns3_gadget_ep0_queue Transfer data on endpoint zero
+ * @ep: pointer to endpoint zero object
+ * @request: pointer to request object
+ * @gfp_flags: gfp flags
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int cdns3_gadget_ep0_queue(struct usb_ep *ep,
+				  struct usb_request *request,
+				  gfp_t gfp_flags)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	unsigned long flags;
+	int erdy_sent = 0;
+	int ret = 0;
+	u8 zlp = 0;
+
+	trace_cdns3_ep0_queue(priv_dev, request);
+
+	/* cancel the request if controller receive new SETUP packet. */
+	if (cdns3_check_new_setup(priv_dev))
+		return -ECONNRESET;
+
+	/* send STATUS stage. Should be called only for SET_CONFIGURATION */
+	if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) {
+		spin_lock_irqsave(&priv_dev->lock, flags);
+		cdns3_select_ep(priv_dev, 0x00);
+
+		erdy_sent = !priv_dev->hw_configured_flag;
+		cdns3_set_hw_configuration(priv_dev);
+
+		if (!erdy_sent)
+			cdns3_ep0_complete_setup(priv_dev, 0, 1);
+
+		cdns3_allow_enable_l1(priv_dev, 1);
+
+		request->actual = 0;
+		priv_dev->status_completion_no_call = true;
+		priv_dev->pending_status_request = request;
+		spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+		/*
+		 * Since there is no completion interrupt for status stage,
+		 * it needs to call ->completion in software after
+		 * ep0_queue is back.
+		 */
+		queue_work(system_freezable_wq, &priv_dev->pending_status_wq);
+		return 0;
+	}
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	if (!list_empty(&priv_ep->pending_req_list)) {
+		dev_err(priv_dev->dev,
+			"can't handle multiple requests for ep0\n");
+		spin_unlock_irqrestore(&priv_dev->lock, flags);
+		return -EBUSY;
+	}
+
+	ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
+					    priv_dev->ep0_data_dir);
+	if (ret) {
+		spin_unlock_irqrestore(&priv_dev->lock, flags);
+		dev_err(priv_dev->dev, "failed to map request\n");
+		return -EINVAL;
+	}
+
+	request->status = -EINPROGRESS;
+	list_add_tail(&request->list, &priv_ep->pending_req_list);
+
+	if (request->zero && request->length &&
+	    (request->length % ep->maxpacket == 0))
+		zlp = 1;
+
+	cdns3_ep0_run_transfer(priv_dev, request->dma, request->length, 1, zlp);
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+	return ret;
+}
+
+/**
+ * cdns3_gadget_ep_set_wedge Set wedge on selected endpoint
+ * @ep: endpoint object
+ *
+ * Returns 0
+ */
+int cdns3_gadget_ep_set_wedge(struct usb_ep *ep)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+
+	dev_dbg(priv_dev->dev, "Wedge for %s\n", ep->name);
+	cdns3_gadget_ep_set_halt(ep, 1);
+	priv_ep->flags |= EP_WEDGE;
+
+	return 0;
+}
+
+const struct usb_ep_ops cdns3_gadget_ep0_ops = {
+	.enable = cdns3_gadget_ep0_enable,
+	.disable = cdns3_gadget_ep0_disable,
+	.alloc_request = cdns3_gadget_ep_alloc_request,
+	.free_request = cdns3_gadget_ep_free_request,
+	.queue = cdns3_gadget_ep0_queue,
+	.dequeue = cdns3_gadget_ep_dequeue,
+	.set_halt = cdns3_gadget_ep0_set_halt,
+	.set_wedge = cdns3_gadget_ep_set_wedge,
+};
+
+/**
+ * cdns3_ep0_config - Configures default endpoint
+ * @priv_dev: extended gadget object
+ *
+ * Functions sets parameters: maximal packet size and enables interrupts
+ */
+void cdns3_ep0_config(struct cdns3_device *priv_dev)
+{
+	struct cdns3_usb_regs __iomem *regs;
+	struct cdns3_endpoint *priv_ep;
+	u32 max_packet_size = 64;
+
+	regs = priv_dev->regs;
+
+	if (priv_dev->gadget.speed == USB_SPEED_SUPER)
+		max_packet_size = 512;
+
+	priv_ep = priv_dev->eps[0];
+
+	if (!list_empty(&priv_ep->pending_req_list)) {
+		struct usb_request *request;
+
+		request = cdns3_next_request(&priv_ep->pending_req_list);
+		list_del_init(&request->list);
+	}
+
+	priv_dev->u1_allowed = 0;
+	priv_dev->u2_allowed = 0;
+
+	priv_dev->gadget.ep0->maxpacket = max_packet_size;
+	cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(max_packet_size);
+
+	/* init ep out */
+	cdns3_select_ep(priv_dev, USB_DIR_OUT);
+
+	if (priv_dev->dev_ver >= DEV_VER_V3) {
+		cdns3_set_register_bit(&priv_dev->regs->dtrans,
+				       BIT(0) | BIT(16));
+		cdns3_set_register_bit(&priv_dev->regs->tdl_from_trb,
+				       BIT(0) | BIT(16));
+	}
+
+	writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
+	       &regs->ep_cfg);
+
+	writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN,
+	       &regs->ep_sts_en);
+
+	/* init ep in */
+	cdns3_select_ep(priv_dev, USB_DIR_IN);
+
+	writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size),
+	       &regs->ep_cfg);
+
+	writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, &regs->ep_sts_en);
+
+	cdns3_set_register_bit(&regs->usb_conf, USB_CONF_U1DS | USB_CONF_U2DS);
+}
+
+/**
+ * cdns3_init_ep0 Initializes software endpoint 0 of gadget
+ * @priv_dev: extended gadget object
+ * @ep_priv: extended endpoint object
+ *
+ * Returns 0 on success else error code.
+ */
+int cdns3_init_ep0(struct cdns3_device *priv_dev,
+		   struct cdns3_endpoint *priv_ep)
+{
+	sprintf(priv_ep->name, "ep0");
+
+	/* fill linux fields */
+	priv_ep->endpoint.ops = &cdns3_gadget_ep0_ops;
+	priv_ep->endpoint.maxburst = 1;
+	usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
+				   CDNS3_EP0_MAX_PACKET_LIMIT);
+	priv_ep->endpoint.address = 0;
+	priv_ep->endpoint.caps.type_control = 1;
+	priv_ep->endpoint.caps.dir_in = 1;
+	priv_ep->endpoint.caps.dir_out = 1;
+	priv_ep->endpoint.name = priv_ep->name;
+	priv_ep->endpoint.desc = &cdns3_gadget_ep0_desc;
+	priv_dev->gadget.ep0 = &priv_ep->endpoint;
+	priv_ep->type = USB_ENDPOINT_XFER_CONTROL;
+
+	return cdns3_allocate_trb_pool(priv_ep);
+}
diff --git a/drivers/usb/cdns3/gadget-export.h b/drivers/usb/cdns3/gadget-export.h
new file mode 100644
index 000000000000..577469eee961
--- /dev/null
+++ b/drivers/usb/cdns3/gadget-export.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USBSS DRD Driver - Gadget Export APIs.
+ *
+ * Copyright (C) 2017 NXP
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Peter Chen <peter.chen@nxp.com>
+ */
+#ifndef __LINUX_CDNS3_GADGET_EXPORT
+#define __LINUX_CDNS3_GADGET_EXPORT
+
+#ifdef CONFIG_USB_CDNS3_GADGET
+
+int cdns3_gadget_init(struct cdns3 *cdns);
+void cdns3_gadget_exit(struct cdns3 *cdns);
+#else
+
+static inline int cdns3_gadget_init(struct cdns3 *cdns)
+{
+	return -ENXIO;
+}
+
+static inline void cdns3_gadget_exit(struct cdns3 *cdns) { }
+
+#endif
+
+#endif /* __LINUX_CDNS3_GADGET_EXPORT */
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
new file mode 100644
index 000000000000..228cdc4ab886
--- /dev/null
+++ b/drivers/usb/cdns3/gadget.c
@@ -0,0 +1,2744 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS DRD Driver - gadget side.
+ *
+ * Copyright (C) 2018-2019 Cadence Design Systems.
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Pawel Jez <pjez@cadence.com>,
+ *          Pawel Laszczak <pawell@cadence.com>
+ *          Peter Chen <peter.chen@nxp.com>
+ */
+
+/*
+ * Work around 1:
+ * At some situations, the controller may get stale data address in TRB
+ * at below sequences:
+ * 1. Controller read TRB includes data address
+ * 2. Software updates TRBs includes data address and Cycle bit
+ * 3. Controller read TRB which includes Cycle bit
+ * 4. DMA run with stale data address
+ *
+ * To fix this problem, driver needs to make the first TRB in TD as invalid.
+ * After preparing all TRBs driver needs to check the position of DMA and
+ * if the DMA point to the first just added TRB and doorbell is 1,
+ * then driver must defer making this TRB as valid. This TRB will be make
+ * as valid during adding next TRB only if DMA is stopped or at TRBERR
+ * interrupt.
+ *
+ * Issue has been fixed in DEV_VER_V3 version of controller.
+ *
+ * Work around 2:
+ * Controller for OUT endpoints has shared on-chip buffers for all incoming
+ * packets, including ep0out. It's FIFO buffer, so packets must be handle by DMA
+ * in correct order. If the first packet in the buffer will not be handled,
+ * then the following packets directed for other endpoints and  functions
+ * will be blocked.
+ * Additionally the packets directed to one endpoint can block entire on-chip
+ * buffers. In this case transfer to other endpoints also will blocked.
+ *
+ * To resolve this issue after raising the descriptor missing interrupt
+ * driver prepares internal usb_request object and use it to arm DMA transfer.
+ *
+ * The problematic situation was observed in case when endpoint has been enabled
+ * but no usb_request were queued. Driver try detects such endpoints and will
+ * use this workaround only for these endpoint.
+ *
+ * Driver use limited number of buffer. This number can be set by macro
+ * CDNS3_WA2_NUM_BUFFERS.
+ *
+ * Such blocking situation was observed on ACM gadget. For this function
+ * host send OUT data packet but ACM function is not prepared for this packet.
+ * It's cause that buffer placed in on chip memory block transfer to other
+ * endpoints.
+ *
+ * Issue has been fixed in DEV_VER_V2 version of controller.
+ *
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/usb/gadget.h>
+#include <linux/module.h>
+#include <linux/iopoll.h>
+
+#include "core.h"
+#include "gadget-export.h"
+#include "gadget.h"
+#include "trace.h"
+#include "drd.h"
+
+static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
+				   struct usb_request *request,
+				   gfp_t gfp_flags);
+
+/**
+ * cdns3_set_register_bit - set bit in given register.
+ * @ptr: address of device controller register to be read and changed
+ * @mask: bits requested to set
+ */
+void cdns3_set_register_bit(void __iomem *ptr, u32 mask)
+{
+	mask = readl(ptr) | mask;
+	writel(mask, ptr);
+}
+
+/**
+ * cdns3_ep_addr_to_index - Macro converts endpoint address to
+ * index of endpoint object in cdns3_device.eps[] container
+ * @ep_addr: endpoint address for which endpoint object is required
+ *
+ */
+u8 cdns3_ep_addr_to_index(u8 ep_addr)
+{
+	return (((ep_addr & 0x7F)) + ((ep_addr & USB_DIR_IN) ? 16 : 0));
+}
+
+static int cdns3_get_dma_pos(struct cdns3_device *priv_dev,
+			     struct cdns3_endpoint *priv_ep)
+{
+	int dma_index;
+
+	dma_index = readl(&priv_dev->regs->ep_traddr) - priv_ep->trb_pool_dma;
+
+	return dma_index / TRB_SIZE;
+}
+
+/**
+ * cdns3_next_request - returns next request from list
+ * @list: list containing requests
+ *
+ * Returns request or NULL if no requests in list
+ */
+struct usb_request *cdns3_next_request(struct list_head *list)
+{
+	return list_first_entry_or_null(list, struct usb_request, list);
+}
+
+/**
+ * cdns3_next_align_buf - returns next buffer from list
+ * @list: list containing buffers
+ *
+ * Returns buffer or NULL if no buffers in list
+ */
+struct cdns3_aligned_buf *cdns3_next_align_buf(struct list_head *list)
+{
+	return list_first_entry_or_null(list, struct cdns3_aligned_buf, list);
+}
+
+/**
+ * cdns3_next_priv_request - returns next request from list
+ * @list: list containing requests
+ *
+ * Returns request or NULL if no requests in list
+ */
+struct cdns3_request *cdns3_next_priv_request(struct list_head *list)
+{
+	return list_first_entry_or_null(list, struct cdns3_request, list);
+}
+
+/**
+ * select_ep - selects endpoint
+ * @priv_dev:  extended gadget object
+ * @ep: endpoint address
+ */
+void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep)
+{
+	if (priv_dev->selected_ep == ep)
+		return;
+
+	priv_dev->selected_ep = ep;
+	writel(ep, &priv_dev->regs->ep_sel);
+}
+
+dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
+				 struct cdns3_trb *trb)
+{
+	u32 offset = (char *)trb - (char *)priv_ep->trb_pool;
+
+	return priv_ep->trb_pool_dma + offset;
+}
+
+int cdns3_ring_size(struct cdns3_endpoint *priv_ep)
+{
+	switch (priv_ep->type) {
+	case USB_ENDPOINT_XFER_ISOC:
+		return TRB_ISO_RING_SIZE;
+	case USB_ENDPOINT_XFER_CONTROL:
+		return TRB_CTRL_RING_SIZE;
+	default:
+		return TRB_RING_SIZE;
+	}
+}
+
+/**
+ * cdns3_allocate_trb_pool - Allocates TRB's pool for selected endpoint
+ * @priv_ep:  endpoint object
+ *
+ * Function will return 0 on success or -ENOMEM on allocation error
+ */
+int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	int ring_size = cdns3_ring_size(priv_ep);
+	struct cdns3_trb *link_trb;
+
+	if (!priv_ep->trb_pool) {
+		priv_ep->trb_pool = dma_alloc_coherent(priv_dev->sysdev,
+						       ring_size,
+						       &priv_ep->trb_pool_dma,
+						       GFP_DMA32 | GFP_ATOMIC);
+		if (!priv_ep->trb_pool)
+			return -ENOMEM;
+	} else {
+		memset(priv_ep->trb_pool, 0, ring_size);
+	}
+
+	if (!priv_ep->num)
+		return 0;
+
+	priv_ep->num_trbs = ring_size / TRB_SIZE;
+	/* Initialize the last TRB as Link TRB. */
+	link_trb = (priv_ep->trb_pool + (priv_ep->num_trbs - 1));
+	link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma);
+	link_trb->control = TRB_CYCLE | TRB_TYPE(TRB_LINK) | TRB_TOGGLE;
+
+	return 0;
+}
+
+static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+
+	if (priv_ep->trb_pool) {
+		dma_free_coherent(priv_dev->sysdev,
+				  cdns3_ring_size(priv_ep),
+				  priv_ep->trb_pool, priv_ep->trb_pool_dma);
+		priv_ep->trb_pool = NULL;
+	}
+}
+
+/**
+ * cdns3_ep_stall_flush - Stalls and flushes selected endpoint
+ * @priv_ep: endpoint object
+ *
+ * Endpoint must be selected before call to this function
+ */
+static void cdns3_ep_stall_flush(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	int val;
+
+	trace_cdns3_halt(priv_ep, 1, 1);
+
+	writel(EP_CMD_DFLUSH | EP_CMD_ERDY | EP_CMD_SSTALL,
+	       &priv_dev->regs->ep_cmd);
+
+	/* wait for DFLUSH cleared */
+	readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
+				  !(val & EP_CMD_DFLUSH), 1, 1000);
+	priv_ep->flags |= EP_STALLED;
+	priv_ep->flags &= ~EP_STALL_PENDING;
+}
+
+/**
+ * cdns3_hw_reset_eps_config - reset endpoints configuration kept by controller.
+ * @priv_dev: extended gadget object
+ */
+void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev)
+{
+	writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf);
+
+	cdns3_allow_enable_l1(priv_dev, 0);
+	priv_dev->hw_configured_flag = 0;
+	priv_dev->onchip_used_size = 0;
+	priv_dev->out_mem_is_allocated = 0;
+	priv_dev->wait_for_setup = 0;
+}
+
+/**
+ * cdns3_ep_inc_trb - increment a trb index.
+ * @index: Pointer to the TRB index to increment.
+ * @cs: Cycle state
+ * @trb_in_seg: number of TRBs in segment
+ *
+ * The index should never point to the link TRB. After incrementing,
+ * if it is point to the link TRB, wrap around to the beginning and revert
+ * cycle state bit The
+ * link TRB is always at the last TRB entry.
+ */
+static void cdns3_ep_inc_trb(int *index, u8 *cs, int trb_in_seg)
+{
+	(*index)++;
+	if (*index == (trb_in_seg - 1)) {
+		*index = 0;
+		*cs ^=  1;
+	}
+}
+
+/**
+ * cdns3_ep_inc_enq - increment endpoint's enqueue pointer
+ * @priv_ep: The endpoint whose enqueue pointer we're incrementing
+ */
+static void cdns3_ep_inc_enq(struct cdns3_endpoint *priv_ep)
+{
+	priv_ep->free_trbs--;
+	cdns3_ep_inc_trb(&priv_ep->enqueue, &priv_ep->pcs, priv_ep->num_trbs);
+}
+
+/**
+ * cdns3_ep_inc_deq - increment endpoint's dequeue pointer
+ * @priv_ep: The endpoint whose dequeue pointer we're incrementing
+ */
+static void cdns3_ep_inc_deq(struct cdns3_endpoint *priv_ep)
+{
+	priv_ep->free_trbs++;
+	cdns3_ep_inc_trb(&priv_ep->dequeue, &priv_ep->ccs, priv_ep->num_trbs);
+}
+
+void cdns3_move_deq_to_next_trb(struct cdns3_request *priv_req)
+{
+	struct cdns3_endpoint *priv_ep = priv_req->priv_ep;
+	int current_trb = priv_req->start_trb;
+
+	while (current_trb != priv_req->end_trb) {
+		cdns3_ep_inc_deq(priv_ep);
+		current_trb = priv_ep->dequeue;
+	}
+
+	cdns3_ep_inc_deq(priv_ep);
+}
+
+/**
+ * cdns3_allow_enable_l1 - enable/disable permits to transition to L1.
+ * @priv_dev: Extended gadget object
+ * @enable: Enable/disable permit to transition to L1.
+ *
+ * If bit USB_CONF_L1EN is set and device receive Extended Token packet,
+ * then controller answer with ACK handshake.
+ * If bit USB_CONF_L1DS is set and device receive Extended Token packet,
+ * then controller answer with NYET handshake.
+ */
+void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable)
+{
+	if (enable)
+		writel(USB_CONF_L1EN, &priv_dev->regs->usb_conf);
+	else
+		writel(USB_CONF_L1DS, &priv_dev->regs->usb_conf);
+}
+
+enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev)
+{
+	u32 reg;
+
+	reg = readl(&priv_dev->regs->usb_sts);
+
+	if (DEV_SUPERSPEED(reg))
+		return USB_SPEED_SUPER;
+	else if (DEV_HIGHSPEED(reg))
+		return USB_SPEED_HIGH;
+	else if (DEV_FULLSPEED(reg))
+		return USB_SPEED_FULL;
+	else if (DEV_LOWSPEED(reg))
+		return USB_SPEED_LOW;
+	return USB_SPEED_UNKNOWN;
+}
+
+/**
+ * cdns3_start_all_request - add to ring all request not started
+ * @priv_dev: Extended gadget object
+ * @priv_ep: The endpoint for whom request will be started.
+ *
+ * Returns return ENOMEM if transfer ring i not enough TRBs to start
+ *         all requests.
+ */
+static int cdns3_start_all_request(struct cdns3_device *priv_dev,
+				   struct cdns3_endpoint *priv_ep)
+{
+	struct usb_request *request;
+	int ret = 0;
+
+	while (!list_empty(&priv_ep->deferred_req_list)) {
+		request = cdns3_next_request(&priv_ep->deferred_req_list);
+
+		ret = cdns3_ep_run_transfer(priv_ep, request);
+		if (ret)
+			return ret;
+
+		list_del(&request->list);
+		list_add_tail(&request->list,
+			      &priv_ep->pending_req_list);
+	}
+
+	priv_ep->flags &= ~EP_RING_FULL;
+	return ret;
+}
+
+/*
+ * WA2: Set flag for all not ISOC OUT endpoints. If this flag is set
+ * driver try to detect whether endpoint need additional internal
+ * buffer for unblocking on-chip FIFO buffer. This flag will be cleared
+ * if before first DESCMISS interrupt the DMA will be armed.
+ */
+#define cdns3_wa2_enable_detection(priv_dev, ep_priv, reg) do { \
+	if (!priv_ep->dir && priv_ep->type != USB_ENDPOINT_XFER_ISOC) { \
+		priv_ep->flags |= EP_QUIRK_EXTRA_BUF_DET; \
+		(reg) |= EP_STS_EN_DESCMISEN; \
+	} } while (0)
+
+/**
+ * cdns3_wa2_descmiss_copy_data copy data from internal requests to
+ * request queued by class driver.
+ * @priv_ep: extended endpoint object
+ * @request: request object
+ */
+static void cdns3_wa2_descmiss_copy_data(struct cdns3_endpoint *priv_ep,
+					 struct usb_request *request)
+{
+	struct usb_request *descmiss_req;
+	struct cdns3_request *descmiss_priv_req;
+
+	while (!list_empty(&priv_ep->wa2_descmiss_req_list)) {
+		int chunk_end;
+		int length;
+
+		descmiss_priv_req =
+			cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list);
+		descmiss_req = &descmiss_priv_req->request;
+
+		/* driver can't touch pending request */
+		if (descmiss_priv_req->flags & REQUEST_PENDING)
+			break;
+
+		chunk_end = descmiss_priv_req->flags & REQUEST_INTERNAL_CH;
+		length = request->actual + descmiss_req->actual;
+
+		request->status = descmiss_req->status;
+
+		if (length <= request->length) {
+			memcpy(&((u8 *)request->buf)[request->actual],
+			       descmiss_req->buf,
+			       descmiss_req->actual);
+			request->actual = length;
+		} else {
+			/* It should never occures */
+			request->status = -ENOMEM;
+		}
+
+		list_del_init(&descmiss_priv_req->list);
+
+		kfree(descmiss_req->buf);
+		cdns3_gadget_ep_free_request(&priv_ep->endpoint, descmiss_req);
+		--priv_ep->wa2_counter;
+
+		if (!chunk_end)
+			break;
+	}
+}
+
+struct usb_request *cdns3_wa2_gadget_giveback(struct cdns3_device *priv_dev,
+					      struct cdns3_endpoint *priv_ep,
+					      struct cdns3_request *priv_req)
+{
+	if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN &&
+	    priv_req->flags & REQUEST_INTERNAL) {
+		struct usb_request *req;
+
+		req = cdns3_next_request(&priv_ep->deferred_req_list);
+
+		priv_ep->descmis_req = NULL;
+
+		if (!req)
+			return NULL;
+
+		cdns3_wa2_descmiss_copy_data(priv_ep, req);
+		if (!(priv_ep->flags & EP_QUIRK_END_TRANSFER) &&
+		    req->length != req->actual) {
+			/* wait for next part of transfer */
+			return NULL;
+		}
+
+		if (req->status == -EINPROGRESS)
+			req->status = 0;
+
+		list_del_init(&req->list);
+		cdns3_start_all_request(priv_dev, priv_ep);
+		return req;
+	}
+
+	return &priv_req->request;
+}
+
+int cdns3_wa2_gadget_ep_queue(struct cdns3_device *priv_dev,
+			      struct cdns3_endpoint *priv_ep,
+			      struct cdns3_request *priv_req)
+{
+	int deferred = 0;
+
+	/*
+	 * If transfer was queued before DESCMISS appear than we
+	 * can disable handling of DESCMISS interrupt. Driver assumes that it
+	 * can disable special treatment for this endpoint.
+	 */
+	if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET) {
+		u32 reg;
+
+		cdns3_select_ep(priv_dev, priv_ep->num | priv_ep->dir);
+		priv_ep->flags &= ~EP_QUIRK_EXTRA_BUF_DET;
+		reg = readl(&priv_dev->regs->ep_sts_en);
+		reg &= ~EP_STS_EN_DESCMISEN;
+		trace_cdns3_wa2(priv_ep, "workaround disabled\n");
+		writel(reg, &priv_dev->regs->ep_sts_en);
+	}
+
+	if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN) {
+		u8 pending_empty = list_empty(&priv_ep->pending_req_list);
+		u8 descmiss_empty = list_empty(&priv_ep->wa2_descmiss_req_list);
+
+		/*
+		 *  DESCMISS transfer has been finished, so data will be
+		 *  directly copied from internal allocated usb_request
+		 *  objects.
+		 */
+		if (pending_empty && !descmiss_empty &&
+		    !(priv_req->flags & REQUEST_INTERNAL)) {
+			cdns3_wa2_descmiss_copy_data(priv_ep,
+						     &priv_req->request);
+
+			trace_cdns3_wa2(priv_ep, "get internal stored data");
+
+			list_add_tail(&priv_req->request.list,
+				      &priv_ep->pending_req_list);
+			cdns3_gadget_giveback(priv_ep, priv_req,
+					      priv_req->request.status);
+
+			/*
+			 * Intentionally driver returns positive value as
+			 * correct value. It informs that transfer has
+			 * been finished.
+			 */
+			return EINPROGRESS;
+		}
+
+		/*
+		 * Driver will wait for completion DESCMISS transfer,
+		 * before starts new, not DESCMISS transfer.
+		 */
+		if (!pending_empty && !descmiss_empty) {
+			trace_cdns3_wa2(priv_ep, "wait for pending transfer\n");
+			deferred = 1;
+		}
+
+		if (priv_req->flags & REQUEST_INTERNAL)
+			list_add_tail(&priv_req->list,
+				      &priv_ep->wa2_descmiss_req_list);
+	}
+
+	return deferred;
+}
+
+static void cdns3_wa2_remove_old_request(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_request *priv_req;
+
+	while (!list_empty(&priv_ep->wa2_descmiss_req_list)) {
+		u8 chain;
+
+		priv_req = cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list);
+		chain = !!(priv_req->flags & REQUEST_INTERNAL_CH);
+
+		trace_cdns3_wa2(priv_ep, "removes eldest request");
+
+		kfree(priv_req->request.buf);
+		cdns3_gadget_ep_free_request(&priv_ep->endpoint,
+					     &priv_req->request);
+		list_del_init(&priv_req->list);
+		--priv_ep->wa2_counter;
+
+		if (!chain)
+			break;
+	}
+}
+
+/**
+ * cdns3_wa2_descmissing_packet - handles descriptor missing event.
+ * @priv_dev: extended gadget object
+ *
+ * This function is used only for WA2. For more information see Work around 2
+ * description.
+ */
+static void cdns3_wa2_descmissing_packet(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_request *priv_req;
+	struct usb_request *request;
+
+	if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET) {
+		priv_ep->flags &= ~EP_QUIRK_EXTRA_BUF_DET;
+		priv_ep->flags |= EP_QUIRK_EXTRA_BUF_EN;
+	}
+
+	trace_cdns3_wa2(priv_ep, "Description Missing detected\n");
+
+	if (priv_ep->wa2_counter >= CDNS3_WA2_NUM_BUFFERS)
+		cdns3_wa2_remove_old_request(priv_ep);
+
+	request = cdns3_gadget_ep_alloc_request(&priv_ep->endpoint,
+						GFP_ATOMIC);
+	if (!request)
+		goto err;
+
+	priv_req = to_cdns3_request(request);
+	priv_req->flags |= REQUEST_INTERNAL;
+
+	/* if this field is still assigned it indicate that transfer related
+	 * with this request has not been finished yet. Driver in this
+	 * case simply allocate next request and assign flag REQUEST_INTERNAL_CH
+	 * flag to previous one. It will indicate that current request is
+	 * part of the previous one.
+	 */
+	if (priv_ep->descmis_req)
+		priv_ep->descmis_req->flags |= REQUEST_INTERNAL_CH;
+
+	priv_req->request.buf = kzalloc(CDNS3_DESCMIS_BUF_SIZE,
+					GFP_ATOMIC);
+	priv_ep->wa2_counter++;
+
+	if (!priv_req->request.buf) {
+		cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);
+		goto err;
+	}
+
+	priv_req->request.length = CDNS3_DESCMIS_BUF_SIZE;
+	priv_ep->descmis_req = priv_req;
+
+	__cdns3_gadget_ep_queue(&priv_ep->endpoint,
+				&priv_ep->descmis_req->request,
+				GFP_ATOMIC);
+
+	return;
+
+err:
+	dev_err(priv_ep->cdns3_dev->dev,
+		"Failed: No sufficient memory for DESCMIS\n");
+}
+
+/**
+ * cdns3_gadget_giveback - call struct usb_request's ->complete callback
+ * @priv_ep: The endpoint to whom the request belongs to
+ * @priv_req: The request we're giving back
+ * @status: completion code for the request
+ *
+ * Must be called with controller's lock held and interrupts disabled. This
+ * function will unmap @req and call its ->complete() callback to notify upper
+ * layers that it has completed.
+ */
+void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
+			   struct cdns3_request *priv_req,
+			   int status)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct usb_request *request = &priv_req->request;
+
+	list_del_init(&request->list);
+
+	if (request->status == -EINPROGRESS)
+		request->status = status;
+
+	usb_gadget_unmap_request_by_dev(priv_dev->sysdev, request,
+					priv_ep->dir);
+
+	if ((priv_req->flags & REQUEST_UNALIGNED) &&
+	    priv_ep->dir == USB_DIR_OUT && !request->status)
+		memcpy(request->buf, priv_req->aligned_buf->buf,
+		       request->length);
+
+	priv_req->flags &= ~(REQUEST_PENDING | REQUEST_UNALIGNED);
+	trace_cdns3_gadget_giveback(priv_req);
+
+	if (priv_dev->dev_ver < DEV_VER_V2) {
+		request = cdns3_wa2_gadget_giveback(priv_dev, priv_ep,
+						    priv_req);
+		if (!request)
+			return;
+	}
+
+	if (request->complete) {
+		spin_unlock(&priv_dev->lock);
+		usb_gadget_giveback_request(&priv_ep->endpoint,
+					    request);
+		spin_lock(&priv_dev->lock);
+	}
+
+	if (request->buf == priv_dev->zlp_buf)
+		cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);
+}
+
+void cdns3_wa1_restore_cycle_bit(struct cdns3_endpoint *priv_ep)
+{
+	/* Work around for stale data address in TRB*/
+	if (priv_ep->wa1_set) {
+		trace_cdns3_wa1(priv_ep, "restore cycle bit");
+
+		priv_ep->wa1_set = 0;
+		priv_ep->wa1_trb_index = 0xFFFF;
+		if (priv_ep->wa1_cycle_bit) {
+			priv_ep->wa1_trb->control =
+				priv_ep->wa1_trb->control | 0x1;
+		} else {
+			priv_ep->wa1_trb->control =
+				priv_ep->wa1_trb->control & ~0x1;
+		}
+	}
+}
+
+static void cdns3_free_aligned_request_buf(struct work_struct *work)
+{
+	struct cdns3_device *priv_dev = container_of(work, struct cdns3_device,
+					aligned_buf_wq);
+	struct cdns3_aligned_buf *buf, *tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	list_for_each_entry_safe(buf, tmp, &priv_dev->aligned_buf_list, list) {
+		if (!buf->in_use) {
+			list_del(&buf->list);
+
+			/*
+			 * Re-enable interrupts to free DMA capable memory.
+			 * Driver can't free this memory with disabled
+			 * interrupts.
+			 */
+			spin_unlock_irqrestore(&priv_dev->lock, flags);
+			dma_free_coherent(priv_dev->sysdev, buf->size,
+					  buf->buf, buf->dma);
+			kfree(buf);
+			spin_lock_irqsave(&priv_dev->lock, flags);
+		}
+	}
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+}
+
+static int cdns3_prepare_aligned_request_buf(struct cdns3_request *priv_req)
+{
+	struct cdns3_endpoint *priv_ep = priv_req->priv_ep;
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct cdns3_aligned_buf *buf;
+
+	/* check if buffer is aligned to 8. */
+	if (!((uintptr_t)priv_req->request.buf & 0x7))
+		return 0;
+
+	buf = priv_req->aligned_buf;
+
+	if (!buf || priv_req->request.length > buf->size) {
+		buf = kzalloc(sizeof(*buf), GFP_ATOMIC);
+		if (!buf)
+			return -ENOMEM;
+
+		buf->size = priv_req->request.length;
+
+		buf->buf = dma_alloc_coherent(priv_dev->sysdev,
+					      buf->size,
+					      &buf->dma,
+					      GFP_ATOMIC);
+		if (!buf->buf) {
+			kfree(buf);
+			return -ENOMEM;
+		}
+
+		if (priv_req->aligned_buf) {
+			trace_cdns3_free_aligned_request(priv_req);
+			priv_req->aligned_buf->in_use = 0;
+			queue_work(system_freezable_wq,
+				   &priv_dev->aligned_buf_wq);
+		}
+
+		buf->in_use = 1;
+		priv_req->aligned_buf = buf;
+
+		list_add_tail(&buf->list,
+			      &priv_dev->aligned_buf_list);
+	}
+
+	if (priv_ep->dir == USB_DIR_IN) {
+		memcpy(buf->buf, priv_req->request.buf,
+		       priv_req->request.length);
+	}
+
+	priv_req->flags |= REQUEST_UNALIGNED;
+	trace_cdns3_prepare_aligned_request(priv_req);
+
+	return 0;
+}
+
+static int cdns3_wa1_update_guard(struct cdns3_endpoint *priv_ep,
+				  struct cdns3_trb *trb)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+
+	if (!priv_ep->wa1_set) {
+		u32 doorbell;
+
+		doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
+
+		if (doorbell) {
+			priv_ep->wa1_cycle_bit = priv_ep->pcs ? TRB_CYCLE : 0;
+			priv_ep->wa1_set = 1;
+			priv_ep->wa1_trb = trb;
+			priv_ep->wa1_trb_index = priv_ep->enqueue;
+			trace_cdns3_wa1(priv_ep, "set guard");
+			return 0;
+		}
+	}
+	return 1;
+}
+
+static void cdns3_wa1_tray_restore_cycle_bit(struct cdns3_device *priv_dev,
+					     struct cdns3_endpoint *priv_ep)
+{
+	int dma_index;
+	u32 doorbell;
+
+	doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
+	dma_index = cdns3_get_dma_pos(priv_dev, priv_ep);
+
+	if (!doorbell || dma_index != priv_ep->wa1_trb_index)
+		cdns3_wa1_restore_cycle_bit(priv_ep);
+}
+
+/**
+ * cdns3_ep_run_transfer - start transfer on no-default endpoint hardware
+ * @priv_ep: endpoint object
+ *
+ * Returns zero on success or negative value on failure
+ */
+int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
+			  struct usb_request *request)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct cdns3_request *priv_req;
+	struct cdns3_trb *trb;
+	dma_addr_t trb_dma;
+	u32 togle_pcs = 1;
+	int sg_iter = 0;
+	int num_trb;
+	int address;
+	u32 control;
+	int pcs;
+
+	if (priv_ep->type == USB_ENDPOINT_XFER_ISOC)
+		num_trb = priv_ep->interval;
+	else
+		num_trb = request->num_sgs ? request->num_sgs : 1;
+
+	if (num_trb > priv_ep->free_trbs) {
+		priv_ep->flags |= EP_RING_FULL;
+		return -ENOBUFS;
+	}
+
+	priv_req = to_cdns3_request(request);
+	address = priv_ep->endpoint.desc->bEndpointAddress;
+
+	priv_ep->flags |= EP_PENDING_REQUEST;
+
+	/* must allocate buffer aligned to 8 */
+	if (priv_req->flags & REQUEST_UNALIGNED)
+		trb_dma = priv_req->aligned_buf->dma;
+	else
+		trb_dma = request->dma;
+
+	trb = priv_ep->trb_pool + priv_ep->enqueue;
+	priv_req->start_trb = priv_ep->enqueue;
+	priv_req->trb = trb;
+
+	cdns3_select_ep(priv_ep->cdns3_dev, address);
+
+	/* prepare ring */
+	if ((priv_ep->enqueue + num_trb)  >= (priv_ep->num_trbs - 1)) {
+		struct cdns3_trb *link_trb;
+		int doorbell, dma_index;
+		u32 ch_bit = 0;
+
+		doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
+		dma_index = cdns3_get_dma_pos(priv_dev, priv_ep);
+
+		/* Driver can't update LINK TRB if it is current processed. */
+		if (doorbell && dma_index == priv_ep->num_trbs - 1) {
+			priv_ep->flags |= EP_DEFERRED_DRDY;
+			return -ENOBUFS;
+		}
+
+		/*updating C bt in  Link TRB before starting DMA*/
+		link_trb = priv_ep->trb_pool + (priv_ep->num_trbs - 1);
+		/*
+		 * For TRs size equal 2 enabling TRB_CHAIN for epXin causes
+		 * that DMA stuck at the LINK TRB.
+		 * On the other hand, removing TRB_CHAIN for longer TRs for
+		 * epXout cause that DMA stuck after handling LINK TRB.
+		 * To eliminate this strange behavioral driver set TRB_CHAIN
+		 * bit only for TR size > 2.
+		 */
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC ||
+		    TRBS_PER_SEGMENT > 2)
+			ch_bit = TRB_CHAIN;
+
+		link_trb->control = ((priv_ep->pcs) ? TRB_CYCLE : 0) |
+				    TRB_TYPE(TRB_LINK) | TRB_TOGGLE | ch_bit;
+	}
+
+	if (priv_dev->dev_ver <= DEV_VER_V2)
+		togle_pcs = cdns3_wa1_update_guard(priv_ep, trb);
+
+	/* set incorrect Cycle Bit for first trb*/
+	control = priv_ep->pcs ? 0 : TRB_CYCLE;
+
+	do {
+		u32 length;
+		u16 td_size = 0;
+
+		/* fill TRB */
+		control |= TRB_TYPE(TRB_NORMAL);
+		trb->buffer = TRB_BUFFER(request->num_sgs == 0
+				? trb_dma : request->sg[sg_iter].dma_address);
+
+		if (likely(!request->num_sgs))
+			length = request->length;
+		else
+			length = request->sg[sg_iter].length;
+
+		if (likely(priv_dev->dev_ver >= DEV_VER_V2))
+			td_size = DIV_ROUND_UP(length,
+					       priv_ep->endpoint.maxpacket);
+
+		trb->length = TRB_BURST_LEN(priv_ep->trb_burst_size) |
+					TRB_LEN(length);
+		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
+			trb->length |= TRB_TDL_SS_SIZE(td_size);
+		else
+			control |= TRB_TDL_HS_SIZE(td_size);
+
+		pcs = priv_ep->pcs ? TRB_CYCLE : 0;
+
+		/*
+		 * first trb should be prepared as last to avoid processing
+		 *  transfer to early
+		 */
+		if (sg_iter != 0)
+			control |= pcs;
+
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir) {
+			control |= TRB_IOC | TRB_ISP;
+		} else {
+			/* for last element in TD or in SG list */
+			if (sg_iter == (num_trb - 1) && sg_iter != 0)
+				control |= pcs | TRB_IOC | TRB_ISP;
+		}
+
+		if (sg_iter)
+			trb->control = control;
+		else
+			priv_req->trb->control = control;
+
+		control = 0;
+		++sg_iter;
+		priv_req->end_trb = priv_ep->enqueue;
+		cdns3_ep_inc_enq(priv_ep);
+		trb = priv_ep->trb_pool + priv_ep->enqueue;
+	} while (sg_iter < num_trb);
+
+	trb = priv_req->trb;
+
+	priv_req->flags |= REQUEST_PENDING;
+
+	if (sg_iter == 1)
+		trb->control |= TRB_IOC | TRB_ISP;
+
+	/*
+	 * Memory barrier - cycle bit must be set before other filds in trb.
+	 */
+	wmb();
+
+	/* give the TD to the consumer*/
+	if (togle_pcs)
+		trb->control =  trb->control ^ 1;
+
+	if (priv_dev->dev_ver <= DEV_VER_V2)
+		cdns3_wa1_tray_restore_cycle_bit(priv_dev, priv_ep);
+
+	trace_cdns3_prepare_trb(priv_ep, priv_req->trb);
+
+	/*
+	 * Memory barrier - Cycle Bit must be set before trb->length  and
+	 * trb->buffer fields.
+	 */
+	wmb();
+
+	/*
+	 * For DMULT mode we can set address to transfer ring only once after
+	 * enabling endpoint.
+	 */
+	if (priv_ep->flags & EP_UPDATE_EP_TRBADDR) {
+		/*
+		 * Until SW is not ready to handle the OUT transfer the ISO OUT
+		 * Endpoint should be disabled (EP_CFG.ENABLE = 0).
+		 * EP_CFG_ENABLE must be set before updating ep_traddr.
+		 */
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir &&
+		    !(priv_ep->flags & EP_QUIRK_ISO_OUT_EN)) {
+			priv_ep->flags |= EP_QUIRK_ISO_OUT_EN;
+			cdns3_set_register_bit(&priv_dev->regs->ep_cfg,
+					       EP_CFG_ENABLE);
+		}
+
+		writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma +
+					priv_req->start_trb * TRB_SIZE),
+					&priv_dev->regs->ep_traddr);
+
+		priv_ep->flags &= ~EP_UPDATE_EP_TRBADDR;
+	}
+
+	if (!priv_ep->wa1_set && !(priv_ep->flags & EP_STALLED)) {
+		trace_cdns3_ring(priv_ep);
+		/*clearing TRBERR and EP_STS_DESCMIS before seting DRDY*/
+		writel(EP_STS_TRBERR | EP_STS_DESCMIS, &priv_dev->regs->ep_sts);
+		writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
+		trace_cdns3_doorbell_epx(priv_ep->name,
+					 readl(&priv_dev->regs->ep_traddr));
+	}
+
+	/* WORKAROUND for transition to L0 */
+	__cdns3_gadget_wakeup(priv_dev);
+
+	return 0;
+}
+
+void cdns3_set_hw_configuration(struct cdns3_device *priv_dev)
+{
+	struct cdns3_endpoint *priv_ep;
+	struct usb_ep *ep;
+	int val;
+
+	if (priv_dev->hw_configured_flag)
+		return;
+
+	writel(USB_CONF_CFGSET, &priv_dev->regs->usb_conf);
+	writel(EP_CMD_ERDY | EP_CMD_REQ_CMPL, &priv_dev->regs->ep_cmd);
+
+	cdns3_set_register_bit(&priv_dev->regs->usb_conf,
+			       USB_CONF_U1EN | USB_CONF_U2EN);
+
+	/* wait until configuration set */
+	readl_poll_timeout_atomic(&priv_dev->regs->usb_sts, val,
+				  val & USB_STS_CFGSTS_MASK, 1, 100);
+
+	priv_dev->hw_configured_flag = 1;
+
+	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
+		if (ep->enabled) {
+			priv_ep = ep_to_cdns3_ep(ep);
+			cdns3_start_all_request(priv_dev, priv_ep);
+		}
+	}
+}
+
+/**
+ * cdns3_request_handled - check whether request has been handled by DMA
+ *
+ * @priv_ep: extended endpoint object.
+ * @priv_req: request object for checking
+ *
+ * Endpoint must be selected before invoking this function.
+ *
+ * Returns false if request has not been handled by DMA, else returns true.
+ *
+ * SR - start ring
+ * ER -  end ring
+ * DQ = priv_ep->dequeue - dequeue position
+ * EQ = priv_ep->enqueue -  enqueue position
+ * ST = priv_req->start_trb - index of first TRB in transfer ring
+ * ET = priv_req->end_trb - index of last TRB in transfer ring
+ * CI = current_index - index of processed TRB by DMA.
+ *
+ * As first step, function checks if cycle bit for priv_req->start_trb is
+ * correct.
+ *
+ * some rules:
+ * 1. priv_ep->dequeue never exceed current_index.
+ * 2  priv_ep->enqueue never exceed priv_ep->dequeue
+ * 3. exception: priv_ep->enqueue == priv_ep->dequeue
+ *    and priv_ep->free_trbs is zero.
+ *    This case indicate that TR is full.
+ *
+ * Then We can split recognition into two parts:
+ * Case 1 - priv_ep->dequeue < current_index
+ *      SR ... EQ ... DQ ... CI ... ER
+ *      SR ... DQ ... CI ... EQ ... ER
+ *
+ *      Request has been handled by DMA if ST and ET is between DQ and CI.
+ *
+ * Case 2 - priv_ep->dequeue > current_index
+ * This situation take place when CI go through the LINK TRB at the end of
+ * transfer ring.
+ *      SR ... CI ... EQ ... DQ ... ER
+ *
+ *      Request has been handled by DMA if ET is less then CI or
+ *      ET is greater or equal DQ.
+ */
+static bool cdns3_request_handled(struct cdns3_endpoint *priv_ep,
+				  struct cdns3_request *priv_req)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct cdns3_trb *trb = priv_req->trb;
+	int current_index = 0;
+	int handled = 0;
+	int doorbell;
+
+	current_index = cdns3_get_dma_pos(priv_dev, priv_ep);
+	doorbell = !!(readl(&priv_dev->regs->ep_cmd) & EP_CMD_DRDY);
+
+	trb = &priv_ep->trb_pool[priv_req->start_trb];
+
+	if ((trb->control  & TRB_CYCLE) != priv_ep->ccs)
+		goto finish;
+
+	if (doorbell == 1 && current_index == priv_ep->dequeue)
+		goto finish;
+
+	/* The corner case for TRBS_PER_SEGMENT equal 2). */
+	if (TRBS_PER_SEGMENT == 2 && priv_ep->type != USB_ENDPOINT_XFER_ISOC) {
+		handled = 1;
+		goto finish;
+	}
+
+	if (priv_ep->enqueue == priv_ep->dequeue &&
+	    priv_ep->free_trbs == 0) {
+		handled = 1;
+	} else if (priv_ep->dequeue < current_index) {
+		if ((current_index == (priv_ep->num_trbs - 1)) &&
+		    !priv_ep->dequeue)
+			goto finish;
+
+		if (priv_req->end_trb >= priv_ep->dequeue &&
+		    priv_req->end_trb < current_index)
+			handled = 1;
+	} else if (priv_ep->dequeue  > current_index) {
+		if (priv_req->end_trb  < current_index ||
+		    priv_req->end_trb >= priv_ep->dequeue)
+			handled = 1;
+	}
+
+finish:
+	trace_cdns3_request_handled(priv_req, current_index, handled);
+
+	return handled;
+}
+
+static void cdns3_transfer_completed(struct cdns3_device *priv_dev,
+				     struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_request *priv_req;
+	struct usb_request *request;
+	struct cdns3_trb *trb;
+
+	while (!list_empty(&priv_ep->pending_req_list)) {
+		request = cdns3_next_request(&priv_ep->pending_req_list);
+		priv_req = to_cdns3_request(request);
+
+		/* Re-select endpoint. It could be changed by other CPU during
+		 * handling usb_gadget_giveback_request.
+		 */
+		cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
+
+		if (!cdns3_request_handled(priv_ep, priv_req))
+			goto prepare_next_td;
+
+		trb = priv_ep->trb_pool + priv_ep->dequeue;
+		trace_cdns3_complete_trb(priv_ep, trb);
+
+		if (trb != priv_req->trb)
+			dev_warn(priv_dev->dev,
+				 "request_trb=0x%p, queue_trb=0x%p\n",
+				 priv_req->trb, trb);
+
+		request->actual = TRB_LEN(le32_to_cpu(trb->length));
+		cdns3_move_deq_to_next_trb(priv_req);
+		cdns3_gadget_giveback(priv_ep, priv_req, 0);
+
+		if (priv_ep->type != USB_ENDPOINT_XFER_ISOC &&
+		    TRBS_PER_SEGMENT == 2)
+			break;
+	}
+	priv_ep->flags &= ~EP_PENDING_REQUEST;
+
+prepare_next_td:
+	if (!(priv_ep->flags & EP_STALLED) &&
+	    !(priv_ep->flags & EP_STALL_PENDING))
+		cdns3_start_all_request(priv_dev, priv_ep);
+}
+
+void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+
+	cdns3_wa1_restore_cycle_bit(priv_ep);
+
+	if (rearm) {
+		trace_cdns3_ring(priv_ep);
+
+		/* Cycle Bit must be updated before arming DMA. */
+		wmb();
+		writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd);
+
+		__cdns3_gadget_wakeup(priv_dev);
+
+		trace_cdns3_doorbell_epx(priv_ep->name,
+					 readl(&priv_dev->regs->ep_traddr));
+	}
+}
+
+/**
+ * cdns3_check_ep_interrupt_proceed - Processes interrupt related to endpoint
+ * @priv_ep: endpoint object
+ *
+ * Returns 0
+ */
+static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	u32 ep_sts_reg;
+
+	cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
+
+	trace_cdns3_epx_irq(priv_dev, priv_ep);
+
+	ep_sts_reg = readl(&priv_dev->regs->ep_sts);
+	writel(ep_sts_reg, &priv_dev->regs->ep_sts);
+
+	if (ep_sts_reg & EP_STS_TRBERR) {
+		if (priv_ep->flags & EP_STALL_PENDING &&
+		    !(ep_sts_reg & EP_STS_DESCMIS &&
+		    priv_dev->dev_ver < DEV_VER_V2)) {
+			cdns3_ep_stall_flush(priv_ep);
+		}
+
+		/*
+		 * For isochronous transfer driver completes request on
+		 * IOC or on TRBERR. IOC appears only when device receive
+		 * OUT data packet. If host disable stream or lost some packet
+		 * then the only way to finish all queued transfer is to do it
+		 * on TRBERR event.
+		 */
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC &&
+		    !priv_ep->wa1_set) {
+			if (!priv_ep->dir) {
+				u32 ep_cfg = readl(&priv_dev->regs->ep_cfg);
+
+				ep_cfg &= ~EP_CFG_ENABLE;
+				writel(ep_cfg, &priv_dev->regs->ep_cfg);
+				priv_ep->flags &= ~EP_QUIRK_ISO_OUT_EN;
+			}
+			cdns3_transfer_completed(priv_dev, priv_ep);
+		} else if (!(priv_ep->flags & EP_STALLED) &&
+			  !(priv_ep->flags & EP_STALL_PENDING)) {
+			if (priv_ep->flags & EP_DEFERRED_DRDY) {
+				priv_ep->flags &= ~EP_DEFERRED_DRDY;
+				cdns3_start_all_request(priv_dev, priv_ep);
+			} else {
+				cdns3_rearm_transfer(priv_ep,
+						     priv_ep->wa1_set);
+			}
+		}
+	}
+
+	if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) {
+		if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN) {
+			if (ep_sts_reg & EP_STS_ISP)
+				priv_ep->flags |= EP_QUIRK_END_TRANSFER;
+			else
+				priv_ep->flags &= ~EP_QUIRK_END_TRANSFER;
+		}
+
+		cdns3_transfer_completed(priv_dev, priv_ep);
+	}
+
+	/*
+	 * WA2: this condition should only be meet when
+	 * priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET or
+	 * priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN.
+	 * In other cases this interrupt will be disabled/
+	 */
+	if (ep_sts_reg & EP_STS_DESCMIS && priv_dev->dev_ver < DEV_VER_V2 &&
+	    !(priv_ep->flags & EP_STALLED))
+		cdns3_wa2_descmissing_packet(priv_ep);
+
+	return 0;
+}
+
+static void cdns3_disconnect_gadget(struct cdns3_device *priv_dev)
+{
+	if (priv_dev->gadget_driver && priv_dev->gadget_driver->disconnect) {
+		spin_unlock(&priv_dev->lock);
+		priv_dev->gadget_driver->disconnect(&priv_dev->gadget);
+		spin_lock(&priv_dev->lock);
+	}
+}
+
+/**
+ * cdns3_check_usb_interrupt_proceed - Processes interrupt related to device
+ * @priv_dev: extended gadget object
+ * @usb_ists: bitmap representation of device's reported interrupts
+ * (usb_ists register value)
+ */
+static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
+					      u32 usb_ists)
+{
+	int speed = 0;
+
+	trace_cdns3_usb_irq(priv_dev, usb_ists);
+	if (usb_ists & USB_ISTS_L1ENTI) {
+		/*
+		 * WORKAROUND: CDNS3 controller has issue with hardware resuming
+		 * from L1. To fix it, if any DMA transfer is pending driver
+		 * must starts driving resume signal immediately.
+		 */
+		if (readl(&priv_dev->regs->drbl))
+			__cdns3_gadget_wakeup(priv_dev);
+	}
+
+	/* Connection detected */
+	if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
+		speed = cdns3_get_speed(priv_dev);
+		priv_dev->gadget.speed = speed;
+		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_POWERED);
+		cdns3_ep0_config(priv_dev);
+	}
+
+	/* Disconnection detected */
+	if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
+		cdns3_disconnect_gadget(priv_dev);
+		priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
+		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
+		cdns3_hw_reset_eps_config(priv_dev);
+	}
+
+	if (usb_ists & (USB_ISTS_L2ENTI | USB_ISTS_U3ENTI)) {
+		if (priv_dev->gadget_driver &&
+		    priv_dev->gadget_driver->suspend) {
+			spin_unlock(&priv_dev->lock);
+			priv_dev->gadget_driver->suspend(&priv_dev->gadget);
+			spin_lock(&priv_dev->lock);
+		}
+	}
+
+	if (usb_ists & (USB_ISTS_L2EXTI | USB_ISTS_U3EXTI)) {
+		if (priv_dev->gadget_driver &&
+		    priv_dev->gadget_driver->resume) {
+			spin_unlock(&priv_dev->lock);
+			priv_dev->gadget_driver->resume(&priv_dev->gadget);
+			spin_lock(&priv_dev->lock);
+		}
+	}
+
+	/* reset*/
+	if (usb_ists & (USB_ISTS_UWRESI | USB_ISTS_UHRESI | USB_ISTS_U2RESI)) {
+		if (priv_dev->gadget_driver) {
+			spin_unlock(&priv_dev->lock);
+			usb_gadget_udc_reset(&priv_dev->gadget,
+					     priv_dev->gadget_driver);
+			spin_lock(&priv_dev->lock);
+
+			/*read again to check the actual speed*/
+			speed = cdns3_get_speed(priv_dev);
+			priv_dev->gadget.speed = speed;
+			cdns3_hw_reset_eps_config(priv_dev);
+			cdns3_ep0_config(priv_dev);
+		}
+	}
+}
+
+/**
+ * cdns3_device_irq_handler- interrupt handler for device part of controller
+ *
+ * @irq: irq number for cdns3 core device
+ * @data: structure of cdns3
+ *
+ * Returns IRQ_HANDLED or IRQ_NONE
+ */
+static irqreturn_t cdns3_device_irq_handler(int irq, void *data)
+{
+	struct cdns3_device *priv_dev;
+	struct cdns3 *cdns = data;
+	irqreturn_t ret = IRQ_NONE;
+	u32 reg;
+
+	priv_dev = cdns->gadget_dev;
+
+	/* check USB device interrupt */
+	reg = readl(&priv_dev->regs->usb_ists);
+	if (reg) {
+		/* After masking interrupts the new interrupts won't be
+		 * reported in usb_ists/ep_ists. In order to not lose some
+		 * of them driver disables only detected interrupts.
+		 * They will be enabled ASAP after clearing source of
+		 * interrupt. This an unusual behavior only applies to
+		 * usb_ists register.
+		 */
+		reg = ~reg & readl(&priv_dev->regs->usb_ien);
+		/* mask deferred interrupt. */
+		writel(reg, &priv_dev->regs->usb_ien);
+		ret = IRQ_WAKE_THREAD;
+	}
+
+	/* check endpoint interrupt */
+	reg = readl(&priv_dev->regs->ep_ists);
+	if (reg) {
+		writel(0, &priv_dev->regs->ep_ien);
+		ret = IRQ_WAKE_THREAD;
+	}
+
+	return ret;
+}
+
+/**
+ * cdns3_device_thread_irq_handler- interrupt handler for device part
+ * of controller
+ *
+ * @irq: irq number for cdns3 core device
+ * @data: structure of cdns3
+ *
+ * Returns IRQ_HANDLED or IRQ_NONE
+ */
+static irqreturn_t cdns3_device_thread_irq_handler(int irq, void *data)
+{
+	struct cdns3_device *priv_dev;
+	struct cdns3 *cdns = data;
+	irqreturn_t ret = IRQ_NONE;
+	unsigned long flags;
+	int bit;
+	u32 reg;
+
+	priv_dev = cdns->gadget_dev;
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	reg = readl(&priv_dev->regs->usb_ists);
+	if (reg) {
+		writel(reg, &priv_dev->regs->usb_ists);
+		writel(USB_IEN_INIT, &priv_dev->regs->usb_ien);
+		cdns3_check_usb_interrupt_proceed(priv_dev, reg);
+		ret = IRQ_HANDLED;
+	}
+
+	reg = readl(&priv_dev->regs->ep_ists);
+
+	/* handle default endpoint OUT */
+	if (reg & EP_ISTS_EP_OUT0) {
+		cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_OUT);
+		ret = IRQ_HANDLED;
+	}
+
+	/* handle default endpoint IN */
+	if (reg & EP_ISTS_EP_IN0) {
+		cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_IN);
+		ret = IRQ_HANDLED;
+	}
+
+	/* check if interrupt from non default endpoint, if no exit */
+	reg &= ~(EP_ISTS_EP_OUT0 | EP_ISTS_EP_IN0);
+	if (!reg)
+		goto irqend;
+
+	for_each_set_bit(bit, (unsigned long *)&reg,
+			 sizeof(u32) * BITS_PER_BYTE) {
+		cdns3_check_ep_interrupt_proceed(priv_dev->eps[bit]);
+		ret = IRQ_HANDLED;
+	}
+
+irqend:
+	writel(~0, &priv_dev->regs->ep_ien);
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+	return ret;
+}
+
+/**
+ * cdns3_ep_onchip_buffer_reserve - Try to reserve onchip buf for EP
+ *
+ * The real reservation will occur during write to EP_CFG register,
+ * this function is used to check if the 'size' reservation is allowed.
+ *
+ * @priv_dev: extended gadget object
+ * @size: the size (KB) for EP would like to allocate
+ * @is_in: endpoint direction
+ *
+ * Return 0 if the required size can met or negative value on failure
+ */
+static int cdns3_ep_onchip_buffer_reserve(struct cdns3_device *priv_dev,
+					  int size, int is_in)
+{
+	int remained;
+
+	/* 2KB are reserved for EP0*/
+	remained = priv_dev->onchip_buffers - priv_dev->onchip_used_size - 2;
+
+	if (is_in) {
+		if (remained < size)
+			return -EPERM;
+
+		priv_dev->onchip_used_size += size;
+	} else {
+		int required;
+
+		/**
+		 *  ALL OUT EPs are shared the same chunk onchip memory, so
+		 * driver checks if it already has assigned enough buffers
+		 */
+		if (priv_dev->out_mem_is_allocated >= size)
+			return 0;
+
+		required = size - priv_dev->out_mem_is_allocated;
+
+		if (required > remained)
+			return -EPERM;
+
+		priv_dev->out_mem_is_allocated += required;
+		priv_dev->onchip_used_size += required;
+	}
+
+	return 0;
+}
+
+void cdns3_configure_dmult(struct cdns3_device *priv_dev,
+			   struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
+
+	/* For dev_ver > DEV_VER_V2 DMULT is configured per endpoint */
+	if (priv_dev->dev_ver <= DEV_VER_V2)
+		writel(USB_CONF_DMULT, &regs->usb_conf);
+
+	if (priv_dev->dev_ver == DEV_VER_V2)
+		writel(USB_CONF2_EN_TDL_TRB, &regs->usb_conf2);
+
+	if (priv_dev->dev_ver >= DEV_VER_V3 && priv_ep) {
+		u32 mask;
+
+		if (priv_ep->dir)
+			mask = BIT(priv_ep->num + 16);
+		else
+			mask = BIT(priv_ep->num);
+
+		if (priv_ep->type != USB_ENDPOINT_XFER_ISOC) {
+			cdns3_set_register_bit(&regs->tdl_from_trb, mask);
+			cdns3_set_register_bit(&regs->tdl_beh, mask);
+			cdns3_set_register_bit(&regs->tdl_beh2, mask);
+			cdns3_set_register_bit(&regs->dma_adv_td, mask);
+		}
+
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir)
+			cdns3_set_register_bit(&regs->tdl_from_trb, mask);
+
+		cdns3_set_register_bit(&regs->dtrans, mask);
+	}
+}
+
+/**
+ * cdns3_ep_config Configure hardware endpoint
+ * @priv_ep: extended endpoint object
+ */
+void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
+{
+	bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	u32 bEndpointAddress = priv_ep->num | priv_ep->dir;
+	u32 max_packet_size = 0;
+	u8 maxburst = 0;
+	u32 ep_cfg = 0;
+	u8 buffering;
+	u8 mult = 0;
+	int ret;
+
+	buffering = CDNS3_EP_BUF_SIZE - 1;
+
+	cdns3_configure_dmult(priv_dev, priv_ep);
+
+	switch (priv_ep->type) {
+	case USB_ENDPOINT_XFER_INT:
+		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT);
+
+		if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) ||
+		    priv_dev->dev_ver > DEV_VER_V2)
+			ep_cfg |= EP_CFG_TDL_CHK;
+		break;
+	case USB_ENDPOINT_XFER_BULK:
+		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK);
+
+		if ((priv_dev->dev_ver == DEV_VER_V2  && !priv_ep->dir) ||
+		    priv_dev->dev_ver > DEV_VER_V2)
+			ep_cfg |= EP_CFG_TDL_CHK;
+		break;
+	default:
+		ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC);
+		mult = CDNS3_EP_ISO_HS_MULT - 1;
+		buffering = mult + 1;
+	}
+
+	switch (priv_dev->gadget.speed) {
+	case USB_SPEED_FULL:
+		max_packet_size = is_iso_ep ? 1023 : 64;
+		break;
+	case USB_SPEED_HIGH:
+		max_packet_size = is_iso_ep ? 1024 : 512;
+		break;
+	case USB_SPEED_SUPER:
+		/* It's limitation that driver assumes in driver. */
+		mult = 0;
+		max_packet_size = 1024;
+		if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
+			maxburst = CDNS3_EP_ISO_SS_BURST - 1;
+			buffering = (mult + 1) *
+				    (maxburst + 1);
+
+			if (priv_ep->interval > 1)
+				buffering++;
+		} else {
+			maxburst = CDNS3_EP_BUF_SIZE - 1;
+		}
+		break;
+	default:
+		/* all other speed are not supported */
+		return;
+	}
+
+	if (max_packet_size == 1024)
+		priv_ep->trb_burst_size = 128;
+	else if (max_packet_size >= 512)
+		priv_ep->trb_burst_size = 64;
+	else
+		priv_ep->trb_burst_size = 16;
+
+	ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1,
+					     !!priv_ep->dir);
+	if (ret) {
+		dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n");
+		return;
+	}
+
+	ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) |
+		  EP_CFG_MULT(mult) |
+		  EP_CFG_BUFFERING(buffering) |
+		  EP_CFG_MAXBURST(maxburst);
+
+	cdns3_select_ep(priv_dev, bEndpointAddress);
+	writel(ep_cfg, &priv_dev->regs->ep_cfg);
+
+	dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n",
+		priv_ep->name, ep_cfg);
+}
+
+/* Find correct direction for HW endpoint according to description */
+static int cdns3_ep_dir_is_correct(struct usb_endpoint_descriptor *desc,
+				   struct cdns3_endpoint *priv_ep)
+{
+	return (priv_ep->endpoint.caps.dir_in && usb_endpoint_dir_in(desc)) ||
+	       (priv_ep->endpoint.caps.dir_out && usb_endpoint_dir_out(desc));
+}
+
+static struct
+cdns3_endpoint *cdns3_find_available_ep(struct cdns3_device *priv_dev,
+					struct usb_endpoint_descriptor *desc)
+{
+	struct usb_ep *ep;
+	struct cdns3_endpoint *priv_ep;
+
+	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
+		unsigned long num;
+		int ret;
+		/* ep name pattern likes epXin or epXout */
+		char c[2] = {ep->name[2], '\0'};
+
+		ret = kstrtoul(c, 10, &num);
+		if (ret)
+			return ERR_PTR(ret);
+
+		priv_ep = ep_to_cdns3_ep(ep);
+		if (cdns3_ep_dir_is_correct(desc, priv_ep)) {
+			if (!(priv_ep->flags & EP_CLAIMED)) {
+				priv_ep->num  = num;
+				return priv_ep;
+			}
+		}
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+
+/*
+ *  Cadence IP has one limitation that all endpoints must be configured
+ * (Type & MaxPacketSize) before setting configuration through hardware
+ * register, it means we can't change endpoints configuration after
+ * set_configuration.
+ *
+ * This function set EP_CLAIMED flag which is added when the gadget driver
+ * uses usb_ep_autoconfig to configure specific endpoint;
+ * When the udc driver receives set_configurion request,
+ * it goes through all claimed endpoints, and configure all endpoints
+ * accordingly.
+ *
+ * At usb_ep_ops.enable/disable, we only enable and disable endpoint through
+ * ep_cfg register which can be changed after set_configuration, and do
+ * some software operation accordingly.
+ */
+static struct
+usb_ep *cdns3_gadget_match_ep(struct usb_gadget *gadget,
+			      struct usb_endpoint_descriptor *desc,
+			      struct usb_ss_ep_comp_descriptor *comp_desc)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	struct cdns3_endpoint *priv_ep;
+	unsigned long flags;
+
+	priv_ep = cdns3_find_available_ep(priv_dev, desc);
+	if (IS_ERR(priv_ep)) {
+		dev_err(priv_dev->dev, "no available ep\n");
+		return NULL;
+	}
+
+	dev_dbg(priv_dev->dev, "match endpoint: %s\n", priv_ep->name);
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	priv_ep->endpoint.desc = desc;
+	priv_ep->dir  = usb_endpoint_dir_in(desc) ? USB_DIR_IN : USB_DIR_OUT;
+	priv_ep->type = usb_endpoint_type(desc);
+	priv_ep->flags |= EP_CLAIMED;
+	priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return &priv_ep->endpoint;
+}
+
+/**
+ * cdns3_gadget_ep_alloc_request Allocates request
+ * @ep: endpoint object associated with request
+ * @gfp_flags: gfp flags
+ *
+ * Returns allocated request address, NULL on allocation error
+ */
+struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
+						  gfp_t gfp_flags)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_request *priv_req;
+
+	priv_req = kzalloc(sizeof(*priv_req), gfp_flags);
+	if (!priv_req)
+		return NULL;
+
+	priv_req->priv_ep = priv_ep;
+
+	trace_cdns3_alloc_request(priv_req);
+	return &priv_req->request;
+}
+
+/**
+ * cdns3_gadget_ep_free_request Free memory occupied by request
+ * @ep: endpoint object associated with request
+ * @request: request to free memory
+ */
+void cdns3_gadget_ep_free_request(struct usb_ep *ep,
+				  struct usb_request *request)
+{
+	struct cdns3_request *priv_req = to_cdns3_request(request);
+
+	if (priv_req->aligned_buf)
+		priv_req->aligned_buf->in_use = 0;
+
+	trace_cdns3_free_request(priv_req);
+	kfree(priv_req);
+}
+
+/**
+ * cdns3_gadget_ep_enable Enable endpoint
+ * @ep: endpoint object
+ * @desc: endpoint descriptor
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int cdns3_gadget_ep_enable(struct usb_ep *ep,
+				  const struct usb_endpoint_descriptor *desc)
+{
+	struct cdns3_endpoint *priv_ep;
+	struct cdns3_device *priv_dev;
+	u32 reg = EP_STS_EN_TRBERREN;
+	u32 bEndpointAddress;
+	unsigned long flags;
+	int enable = 1;
+	int ret;
+	int val;
+
+	priv_ep = ep_to_cdns3_ep(ep);
+	priv_dev = priv_ep->cdns3_dev;
+
+	if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
+		dev_dbg(priv_dev->dev, "usbss: invalid parameters\n");
+		return -EINVAL;
+	}
+
+	if (!desc->wMaxPacketSize) {
+		dev_err(priv_dev->dev, "usbss: missing wMaxPacketSize\n");
+		return -EINVAL;
+	}
+
+	if (dev_WARN_ONCE(priv_dev->dev, priv_ep->flags & EP_ENABLED,
+			  "%s is already enabled\n", priv_ep->name))
+		return 0;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	priv_ep->endpoint.desc = desc;
+	priv_ep->type = usb_endpoint_type(desc);
+	priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0;
+
+	if (priv_ep->interval > ISO_MAX_INTERVAL &&
+	    priv_ep->type == USB_ENDPOINT_XFER_ISOC) {
+		dev_err(priv_dev->dev, "Driver is limited to %d period\n",
+			ISO_MAX_INTERVAL);
+
+		ret =  -EINVAL;
+		goto exit;
+	}
+
+	ret = cdns3_allocate_trb_pool(priv_ep);
+
+	if (ret)
+		goto exit;
+
+	bEndpointAddress = priv_ep->num | priv_ep->dir;
+	cdns3_select_ep(priv_dev, bEndpointAddress);
+
+	trace_cdns3_gadget_ep_enable(priv_ep);
+
+	writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
+
+	ret = readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
+					!(val & (EP_CMD_CSTALL | EP_CMD_EPRST)),
+					1, 1000);
+
+	if (unlikely(ret)) {
+		cdns3_free_trb_pool(priv_ep);
+		ret =  -EINVAL;
+		goto exit;
+	}
+
+	/* enable interrupt for selected endpoint */
+	cdns3_set_register_bit(&priv_dev->regs->ep_ien,
+			       BIT(cdns3_ep_addr_to_index(bEndpointAddress)));
+
+	if (priv_dev->dev_ver < DEV_VER_V2)
+		cdns3_wa2_enable_detection(priv_dev, priv_ep, reg);
+
+	writel(reg, &priv_dev->regs->ep_sts_en);
+
+	/*
+	 * For some versions of controller at some point during ISO OUT traffic
+	 * DMA reads Transfer Ring for the EP which has never got doorbell.
+	 * This issue was detected only on simulation, but to avoid this issue
+	 * driver add protection against it. To fix it driver enable ISO OUT
+	 * endpoint before setting DRBL. This special treatment of ISO OUT
+	 * endpoints are recommended by controller specification.
+	 */
+	if (priv_ep->type == USB_ENDPOINT_XFER_ISOC  && !priv_ep->dir)
+		enable = 0;
+
+	if (enable)
+		cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE);
+
+	ep->desc = desc;
+	priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALLED | EP_STALL_PENDING |
+			    EP_QUIRK_ISO_OUT_EN | EP_QUIRK_EXTRA_BUF_EN);
+	priv_ep->flags |= EP_ENABLED | EP_UPDATE_EP_TRBADDR;
+	priv_ep->wa1_set = 0;
+	priv_ep->enqueue = 0;
+	priv_ep->dequeue = 0;
+	reg = readl(&priv_dev->regs->ep_sts);
+	priv_ep->pcs = !!EP_STS_CCS(reg);
+	priv_ep->ccs = !!EP_STS_CCS(reg);
+	/* one TRB is reserved for link TRB used in DMULT mode*/
+	priv_ep->free_trbs = priv_ep->num_trbs - 1;
+exit:
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+	return ret;
+}
+
+/**
+ * cdns3_gadget_ep_disable Disable endpoint
+ * @ep: endpoint object
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int cdns3_gadget_ep_disable(struct usb_ep *ep)
+{
+	struct cdns3_endpoint *priv_ep;
+	struct cdns3_request *priv_req;
+	struct cdns3_device *priv_dev;
+	struct usb_request *request;
+	unsigned long flags;
+	int ret = 0;
+	u32 ep_cfg;
+	int val;
+
+	if (!ep) {
+		pr_err("usbss: invalid parameters\n");
+		return -EINVAL;
+	}
+
+	priv_ep = ep_to_cdns3_ep(ep);
+	priv_dev = priv_ep->cdns3_dev;
+
+	if (dev_WARN_ONCE(priv_dev->dev, !(priv_ep->flags & EP_ENABLED),
+			  "%s is already disabled\n", priv_ep->name))
+		return 0;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	trace_cdns3_gadget_ep_disable(priv_ep);
+
+	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
+
+	ep_cfg = readl(&priv_dev->regs->ep_cfg);
+	ep_cfg &= ~EP_CFG_ENABLE;
+	writel(ep_cfg, &priv_dev->regs->ep_cfg);
+
+	/**
+	 * Driver needs some time before resetting endpoint.
+	 * It need waits for clearing DBUSY bit or for timeout expired.
+	 * 10us is enough time for controller to stop transfer.
+	 */
+	readl_poll_timeout_atomic(&priv_dev->regs->ep_sts, val,
+				  !(val & EP_STS_DBUSY), 1, 10);
+	writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
+
+	readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
+				  !(val & (EP_CMD_CSTALL | EP_CMD_EPRST)),
+				  1, 1000);
+	if (unlikely(ret))
+		dev_err(priv_dev->dev, "Timeout: %s resetting failed.\n",
+			priv_ep->name);
+
+	while (!list_empty(&priv_ep->pending_req_list)) {
+		request = cdns3_next_request(&priv_ep->pending_req_list);
+
+		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
+				      -ESHUTDOWN);
+	}
+
+	while (!list_empty(&priv_ep->wa2_descmiss_req_list)) {
+		priv_req = cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list);
+
+		kfree(priv_req->request.buf);
+		cdns3_gadget_ep_free_request(&priv_ep->endpoint,
+					     &priv_req->request);
+		list_del_init(&priv_req->list);
+		--priv_ep->wa2_counter;
+	}
+
+	while (!list_empty(&priv_ep->deferred_req_list)) {
+		request = cdns3_next_request(&priv_ep->deferred_req_list);
+
+		cdns3_gadget_giveback(priv_ep, to_cdns3_request(request),
+				      -ESHUTDOWN);
+	}
+
+	priv_ep->descmis_req = NULL;
+
+	ep->desc = NULL;
+	priv_ep->flags &= ~EP_ENABLED;
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+	return ret;
+}
+
+/**
+ * cdns3_gadget_ep_queue Transfer data on endpoint
+ * @ep: endpoint object
+ * @request: request object
+ * @gfp_flags: gfp flags
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int __cdns3_gadget_ep_queue(struct usb_ep *ep,
+				   struct usb_request *request,
+				   gfp_t gfp_flags)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct cdns3_request *priv_req;
+	int ret = 0;
+
+	request->actual = 0;
+	request->status = -EINPROGRESS;
+	priv_req = to_cdns3_request(request);
+	trace_cdns3_ep_queue(priv_req);
+
+	if (priv_dev->dev_ver < DEV_VER_V2) {
+		ret = cdns3_wa2_gadget_ep_queue(priv_dev, priv_ep,
+						priv_req);
+
+		if (ret == EINPROGRESS)
+			return 0;
+	}
+
+	ret = cdns3_prepare_aligned_request_buf(priv_req);
+	if (ret < 0)
+		return ret;
+
+	ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request,
+					    usb_endpoint_dir_in(ep->desc));
+	if (ret)
+		return ret;
+
+	list_add_tail(&request->list, &priv_ep->deferred_req_list);
+
+	/*
+	 * If hardware endpoint configuration has not been set yet then
+	 * just queue request in deferred list. Transfer will be started in
+	 * cdns3_set_hw_configuration.
+	 */
+	if (priv_dev->hw_configured_flag && !(priv_ep->flags & EP_STALLED) &&
+	    !(priv_ep->flags & EP_STALL_PENDING))
+		cdns3_start_all_request(priv_dev, priv_ep);
+
+	return 0;
+}
+
+static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
+				 gfp_t gfp_flags)
+{
+	struct usb_request *zlp_request;
+	struct cdns3_endpoint *priv_ep;
+	struct cdns3_device *priv_dev;
+	unsigned long flags;
+	int ret;
+
+	if (!request || !ep)
+		return -EINVAL;
+
+	priv_ep = ep_to_cdns3_ep(ep);
+	priv_dev = priv_ep->cdns3_dev;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	ret = __cdns3_gadget_ep_queue(ep, request, gfp_flags);
+
+	if (ret == 0 && request->zero && request->length &&
+	    (request->length % ep->maxpacket == 0)) {
+		struct cdns3_request *priv_req;
+
+		zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC);
+		zlp_request->buf = priv_dev->zlp_buf;
+		zlp_request->length = 0;
+
+		priv_req = to_cdns3_request(zlp_request);
+		priv_req->flags |= REQUEST_ZLP;
+
+		dev_dbg(priv_dev->dev, "Queuing ZLP for endpoint: %s\n",
+			priv_ep->name);
+		ret = __cdns3_gadget_ep_queue(ep, zlp_request, gfp_flags);
+	}
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return ret;
+}
+
+/**
+ * cdns3_gadget_ep_dequeue Remove request from transfer queue
+ * @ep: endpoint object associated with request
+ * @request: request object
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+int cdns3_gadget_ep_dequeue(struct usb_ep *ep,
+			    struct usb_request *request)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct usb_request *req, *req_temp;
+	struct cdns3_request *priv_req;
+	struct cdns3_trb *link_trb;
+	unsigned long flags;
+	int ret = 0;
+
+	if (!ep || !request || !ep->desc)
+		return -EINVAL;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	priv_req = to_cdns3_request(request);
+
+	trace_cdns3_ep_dequeue(priv_req);
+
+	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
+
+	list_for_each_entry_safe(req, req_temp, &priv_ep->pending_req_list,
+				 list) {
+		if (request == req)
+			goto found;
+	}
+
+	list_for_each_entry_safe(req, req_temp, &priv_ep->deferred_req_list,
+				 list) {
+		if (request == req)
+			goto found;
+	}
+
+	goto not_found;
+
+found:
+
+	if (priv_ep->wa1_trb == priv_req->trb)
+		cdns3_wa1_restore_cycle_bit(priv_ep);
+
+	link_trb = priv_req->trb;
+	cdns3_move_deq_to_next_trb(priv_req);
+	cdns3_gadget_giveback(priv_ep, priv_req, -ECONNRESET);
+
+	/* Update ring */
+	request = cdns3_next_request(&priv_ep->deferred_req_list);
+	if (request) {
+		priv_req = to_cdns3_request(request);
+
+		link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma +
+					      (priv_req->start_trb * TRB_SIZE));
+		link_trb->control = (link_trb->control & TRB_CYCLE) |
+				    TRB_TYPE(TRB_LINK) | TRB_CHAIN | TRB_TOGGLE;
+	} else {
+		priv_ep->flags |= EP_UPDATE_EP_TRBADDR;
+	}
+
+not_found:
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return ret;
+}
+
+/**
+ * __cdns3_gadget_ep_set_halt Sets stall on selected endpoint
+ * Should be called after acquiring spin_lock and selecting ep
+ * @ep: endpoint object to set stall on.
+ */
+void __cdns3_gadget_ep_set_halt(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+
+	trace_cdns3_halt(priv_ep, 1, 0);
+
+	if (!(priv_ep->flags & EP_STALLED)) {
+		u32 ep_sts_reg = readl(&priv_dev->regs->ep_sts);
+
+		if (!(ep_sts_reg & EP_STS_DBUSY))
+			cdns3_ep_stall_flush(priv_ep);
+		else
+			priv_ep->flags |= EP_STALL_PENDING;
+	}
+}
+
+/**
+ * __cdns3_gadget_ep_clear_halt Clears stall on selected endpoint
+ * Should be called after acquiring spin_lock and selecting ep
+ * @ep: endpoint object to clear stall on
+ */
+int __cdns3_gadget_ep_clear_halt(struct cdns3_endpoint *priv_ep)
+{
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	struct usb_request *request;
+	int ret;
+	int val;
+
+	trace_cdns3_halt(priv_ep, 0, 0);
+
+	writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
+
+	/* wait for EPRST cleared */
+	ret = readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
+					!(val & EP_CMD_EPRST), 1, 100);
+	if (ret)
+		return -EINVAL;
+
+	priv_ep->flags &= ~(EP_STALLED | EP_STALL_PENDING);
+
+	request = cdns3_next_request(&priv_ep->pending_req_list);
+
+	if (request)
+		cdns3_rearm_transfer(priv_ep, 1);
+
+	cdns3_start_all_request(priv_dev, priv_ep);
+	return ret;
+}
+
+/**
+ * cdns3_gadget_ep_set_halt Sets/clears stall on selected endpoint
+ * @ep: endpoint object to set/clear stall on
+ * @value: 1 for set stall, 0 for clear stall
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value)
+{
+	struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep);
+	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
+	unsigned long flags;
+	int ret = 0;
+
+	if (!(priv_ep->flags & EP_ENABLED))
+		return -EPERM;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+
+	cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress);
+
+	if (!value) {
+		priv_ep->flags &= ~EP_WEDGE;
+		ret = __cdns3_gadget_ep_clear_halt(priv_ep);
+	} else {
+		__cdns3_gadget_ep_set_halt(priv_ep);
+	}
+
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+
+	return ret;
+}
+
+extern const struct usb_ep_ops cdns3_gadget_ep0_ops;
+
+static const struct usb_ep_ops cdns3_gadget_ep_ops = {
+	.enable = cdns3_gadget_ep_enable,
+	.disable = cdns3_gadget_ep_disable,
+	.alloc_request = cdns3_gadget_ep_alloc_request,
+	.free_request = cdns3_gadget_ep_free_request,
+	.queue = cdns3_gadget_ep_queue,
+	.dequeue = cdns3_gadget_ep_dequeue,
+	.set_halt = cdns3_gadget_ep_set_halt,
+	.set_wedge = cdns3_gadget_ep_set_wedge,
+};
+
+/**
+ * cdns3_gadget_get_frame Returns number of actual ITP frame
+ * @gadget: gadget object
+ *
+ * Returns number of actual ITP frame
+ */
+static int cdns3_gadget_get_frame(struct usb_gadget *gadget)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+
+	return readl(&priv_dev->regs->usb_itpn);
+}
+
+int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev)
+{
+	enum usb_device_speed speed;
+
+	speed = cdns3_get_speed(priv_dev);
+
+	if (speed >= USB_SPEED_SUPER)
+		return 0;
+
+	/* Start driving resume signaling to indicate remote wakeup. */
+	writel(USB_CONF_LGO_L0, &priv_dev->regs->usb_conf);
+
+	return 0;
+}
+
+static int cdns3_gadget_wakeup(struct usb_gadget *gadget)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	ret = __cdns3_gadget_wakeup(priv_dev);
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return ret;
+}
+
+static int cdns3_gadget_set_selfpowered(struct usb_gadget *gadget,
+					int is_selfpowered)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	priv_dev->is_selfpowered = !!is_selfpowered;
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return 0;
+}
+
+static int cdns3_gadget_pullup(struct usb_gadget *gadget, int is_on)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+
+	if (is_on)
+		writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf);
+	else
+		writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
+
+	return 0;
+}
+
+static void cdns3_gadget_config(struct cdns3_device *priv_dev)
+{
+	struct cdns3_usb_regs __iomem *regs = priv_dev->regs;
+	u32 reg;
+
+	cdns3_ep0_config(priv_dev);
+
+	/* enable interrupts for endpoint 0 (in and out) */
+	writel(EP_IEN_EP_OUT0 | EP_IEN_EP_IN0, &regs->ep_ien);
+
+	/*
+	 * Driver needs to modify LFPS minimal U1 Exit time for DEV_VER_TI_V1
+	 * revision of controller.
+	 */
+	if (priv_dev->dev_ver == DEV_VER_TI_V1) {
+		reg = readl(&regs->dbg_link1);
+
+		reg &= ~DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK;
+		reg |= DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(0x55) |
+		       DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET;
+		writel(reg, &regs->dbg_link1);
+	}
+
+	/*
+	 * By default some platforms has set protected access to memory.
+	 * This cause problem with cache, so driver restore non-secure
+	 * access to memory.
+	 */
+	reg = readl(&regs->dma_axi_ctrl);
+	reg |= DMA_AXI_CTRL_MARPROT(DMA_AXI_CTRL_NON_SECURE) |
+	       DMA_AXI_CTRL_MAWPROT(DMA_AXI_CTRL_NON_SECURE);
+	writel(reg, &regs->dma_axi_ctrl);
+
+	/* enable generic interrupt*/
+	writel(USB_IEN_INIT, &regs->usb_ien);
+	writel(USB_CONF_CLK2OFFDS | USB_CONF_L1DS, &regs->usb_conf);
+
+	cdns3_configure_dmult(priv_dev, NULL);
+
+	cdns3_gadget_pullup(&priv_dev->gadget, 1);
+}
+
+/**
+ * cdns3_gadget_udc_start Gadget start
+ * @gadget: gadget object
+ * @driver: driver which operates on this gadget
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int cdns3_gadget_udc_start(struct usb_gadget *gadget,
+				  struct usb_gadget_driver *driver)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv_dev->lock, flags);
+	priv_dev->gadget_driver = driver;
+	cdns3_gadget_config(priv_dev);
+	spin_unlock_irqrestore(&priv_dev->lock, flags);
+	return 0;
+}
+
+/**
+ * cdns3_gadget_udc_stop Stops gadget
+ * @gadget: gadget object
+ *
+ * Returns 0
+ */
+static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
+{
+	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	struct cdns3_endpoint *priv_ep;
+	u32 bEndpointAddress;
+	struct usb_ep *ep;
+	int ret = 0;
+	int val;
+
+	priv_dev->gadget_driver = NULL;
+
+	priv_dev->onchip_used_size = 0;
+	priv_dev->out_mem_is_allocated = 0;
+	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
+
+	list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) {
+		priv_ep = ep_to_cdns3_ep(ep);
+		bEndpointAddress = priv_ep->num | priv_ep->dir;
+		cdns3_select_ep(priv_dev, bEndpointAddress);
+		writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
+		readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
+					  !(val & EP_CMD_EPRST), 1, 100);
+	}
+
+	/* disable interrupt for device */
+	writel(0, &priv_dev->regs->usb_ien);
+	writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf);
+
+	return ret;
+}
+
+static const struct usb_gadget_ops cdns3_gadget_ops = {
+	.get_frame = cdns3_gadget_get_frame,
+	.wakeup = cdns3_gadget_wakeup,
+	.set_selfpowered = cdns3_gadget_set_selfpowered,
+	.pullup = cdns3_gadget_pullup,
+	.udc_start = cdns3_gadget_udc_start,
+	.udc_stop = cdns3_gadget_udc_stop,
+	.match_ep = cdns3_gadget_match_ep,
+};
+
+static void cdns3_free_all_eps(struct cdns3_device *priv_dev)
+{
+	int i;
+
+	/* ep0 OUT point to ep0 IN. */
+	priv_dev->eps[16] = NULL;
+
+	for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++)
+		if (priv_dev->eps[i]) {
+			cdns3_free_trb_pool(priv_dev->eps[i]);
+			devm_kfree(priv_dev->dev, priv_dev->eps[i]);
+		}
+}
+
+/**
+ * cdns3_init_eps Initializes software endpoints of gadget
+ * @cdns3: extended gadget object
+ *
+ * Returns 0 on success, error code elsewhere
+ */
+static int cdns3_init_eps(struct cdns3_device *priv_dev)
+{
+	u32 ep_enabled_reg, iso_ep_reg;
+	struct cdns3_endpoint *priv_ep;
+	int ep_dir, ep_number;
+	u32 ep_mask;
+	int ret = 0;
+	int i;
+
+	/* Read it from USB_CAP3 to USB_CAP5 */
+	ep_enabled_reg = readl(&priv_dev->regs->usb_cap3);
+	iso_ep_reg = readl(&priv_dev->regs->usb_cap4);
+
+	dev_dbg(priv_dev->dev, "Initializing non-zero endpoints\n");
+
+	for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) {
+		ep_dir = i >> 4;	/* i div 16 */
+		ep_number = i & 0xF;	/* i % 16 */
+		ep_mask = BIT(i);
+
+		if (!(ep_enabled_reg & ep_mask))
+			continue;
+
+		if (ep_dir && !ep_number) {
+			priv_dev->eps[i] = priv_dev->eps[0];
+			continue;
+		}
+
+		priv_ep = devm_kzalloc(priv_dev->dev, sizeof(*priv_ep),
+				       GFP_KERNEL);
+		if (!priv_ep)
+			goto err;
+
+		/* set parent of endpoint object */
+		priv_ep->cdns3_dev = priv_dev;
+		priv_dev->eps[i] = priv_ep;
+		priv_ep->num = ep_number;
+		priv_ep->dir = ep_dir ? USB_DIR_IN : USB_DIR_OUT;
+
+		if (!ep_number) {
+			ret = cdns3_init_ep0(priv_dev, priv_ep);
+			if (ret) {
+				dev_err(priv_dev->dev, "Failed to init ep0\n");
+				goto err;
+			}
+		} else {
+			snprintf(priv_ep->name, sizeof(priv_ep->name), "ep%d%s",
+				 ep_number, !!ep_dir ? "in" : "out");
+			priv_ep->endpoint.name = priv_ep->name;
+
+			usb_ep_set_maxpacket_limit(&priv_ep->endpoint,
+						   CDNS3_EP_MAX_PACKET_LIMIT);
+			priv_ep->endpoint.max_streams = CDNS3_EP_MAX_STREAMS;
+			priv_ep->endpoint.ops = &cdns3_gadget_ep_ops;
+			if (ep_dir)
+				priv_ep->endpoint.caps.dir_in = 1;
+			else
+				priv_ep->endpoint.caps.dir_out = 1;
+
+			if (iso_ep_reg & ep_mask)
+				priv_ep->endpoint.caps.type_iso = 1;
+
+			priv_ep->endpoint.caps.type_bulk = 1;
+			priv_ep->endpoint.caps.type_int = 1;
+
+			list_add_tail(&priv_ep->endpoint.ep_list,
+				      &priv_dev->gadget.ep_list);
+		}
+
+		priv_ep->flags = 0;
+
+		dev_info(priv_dev->dev, "Initialized  %s support: %s %s\n",
+			 priv_ep->name,
+			 priv_ep->endpoint.caps.type_bulk ? "BULK, INT" : "",
+			 priv_ep->endpoint.caps.type_iso ? "ISO" : "");
+
+		INIT_LIST_HEAD(&priv_ep->pending_req_list);
+		INIT_LIST_HEAD(&priv_ep->deferred_req_list);
+		INIT_LIST_HEAD(&priv_ep->wa2_descmiss_req_list);
+	}
+
+	return 0;
+err:
+	cdns3_free_all_eps(priv_dev);
+	return -ENOMEM;
+}
+
+void cdns3_gadget_exit(struct cdns3 *cdns)
+{
+	struct cdns3_device *priv_dev;
+
+	priv_dev = cdns->gadget_dev;
+
+	devm_free_irq(cdns->dev, cdns->dev_irq, cdns);
+
+	pm_runtime_mark_last_busy(cdns->dev);
+	pm_runtime_put_autosuspend(cdns->dev);
+
+	usb_del_gadget_udc(&priv_dev->gadget);
+
+	cdns3_free_all_eps(priv_dev);
+
+	while (!list_empty(&priv_dev->aligned_buf_list)) {
+		struct cdns3_aligned_buf *buf;
+
+		buf = cdns3_next_align_buf(&priv_dev->aligned_buf_list);
+		dma_free_coherent(priv_dev->sysdev, buf->size,
+				  buf->buf,
+				  buf->dma);
+
+		list_del(&buf->list);
+		kfree(buf);
+	}
+
+	dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
+			  priv_dev->setup_dma);
+
+	kfree(priv_dev->zlp_buf);
+	kfree(priv_dev);
+	cdns->gadget_dev = NULL;
+	cdns3_drd_switch_gadget(cdns, 0);
+}
+
+static int cdns3_gadget_start(struct cdns3 *cdns)
+{
+	struct cdns3_device *priv_dev;
+	u32 max_speed;
+	int ret;
+
+	priv_dev = kzalloc(sizeof(*priv_dev), GFP_KERNEL);
+	if (!priv_dev)
+		return -ENOMEM;
+
+	cdns->gadget_dev = priv_dev;
+	priv_dev->sysdev = cdns->dev;
+	priv_dev->dev = cdns->dev;
+	priv_dev->regs = cdns->dev_regs;
+
+	device_property_read_u16(priv_dev->dev, "cdns,on-chip-buff-size",
+				 &priv_dev->onchip_buffers);
+
+	if (priv_dev->onchip_buffers <=  0) {
+		u32 reg = readl(&priv_dev->regs->usb_cap2);
+
+		priv_dev->onchip_buffers = USB_CAP2_ACTUAL_MEM_SIZE(reg);
+	}
+
+	if (!priv_dev->onchip_buffers)
+		priv_dev->onchip_buffers = 256;
+
+	max_speed = usb_get_maximum_speed(cdns->dev);
+
+	/* Check the maximum_speed parameter */
+	switch (max_speed) {
+	case USB_SPEED_FULL:
+		writel(USB_CONF_SFORCE_FS, &priv_dev->regs->usb_conf);
+		break;
+	case USB_SPEED_HIGH:
+		writel(USB_CONF_USB3DIS, &priv_dev->regs->usb_conf);
+		break;
+	case USB_SPEED_SUPER:
+		break;
+	default:
+		dev_err(cdns->dev, "invalid maximum_speed parameter %d\n",
+			max_speed);
+		/* fall through */
+	case USB_SPEED_UNKNOWN:
+		/* default to superspeed */
+		max_speed = USB_SPEED_SUPER;
+		break;
+	}
+
+	/* fill gadget fields */
+	priv_dev->gadget.max_speed = max_speed;
+	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
+	priv_dev->gadget.ops = &cdns3_gadget_ops;
+	priv_dev->gadget.name = "usb-ss-gadget";
+	priv_dev->gadget.sg_supported = 1;
+	priv_dev->gadget.quirk_avoids_skb_reserve = 1;
+
+	spin_lock_init(&priv_dev->lock);
+	INIT_WORK(&priv_dev->pending_status_wq,
+		  cdns3_pending_setup_status_handler);
+
+	INIT_WORK(&priv_dev->aligned_buf_wq,
+		  cdns3_free_aligned_request_buf);
+
+	/* initialize endpoint container */
+	INIT_LIST_HEAD(&priv_dev->gadget.ep_list);
+	INIT_LIST_HEAD(&priv_dev->aligned_buf_list);
+
+	ret = cdns3_init_eps(priv_dev);
+	if (ret) {
+		dev_err(priv_dev->dev, "Failed to create endpoints\n");
+		goto err1;
+	}
+
+	/* allocate memory for setup packet buffer */
+	priv_dev->setup_buf = dma_alloc_coherent(priv_dev->sysdev, 8,
+						 &priv_dev->setup_dma, GFP_DMA);
+	if (!priv_dev->setup_buf) {
+		ret = -ENOMEM;
+		goto err2;
+	}
+
+	priv_dev->dev_ver = readl(&priv_dev->regs->usb_cap6);
+
+	dev_dbg(priv_dev->dev, "Device Controller version: %08x\n",
+		readl(&priv_dev->regs->usb_cap6));
+	dev_dbg(priv_dev->dev, "USB Capabilities:: %08x\n",
+		readl(&priv_dev->regs->usb_cap1));
+	dev_dbg(priv_dev->dev, "On-Chip memory configuration: %08x\n",
+		readl(&priv_dev->regs->usb_cap2));
+
+	priv_dev->dev_ver = GET_DEV_BASE_VERSION(priv_dev->dev_ver);
+
+	priv_dev->zlp_buf = kzalloc(CDNS3_EP_ZLP_BUF_SIZE, GFP_KERNEL);
+	if (!priv_dev->zlp_buf) {
+		ret = -ENOMEM;
+		goto err3;
+	}
+
+	/* add USB gadget device */
+	ret = usb_add_gadget_udc(priv_dev->dev, &priv_dev->gadget);
+	if (ret < 0) {
+		dev_err(priv_dev->dev,
+			"Failed to register USB device controller\n");
+		goto err4;
+	}
+
+	return 0;
+err4:
+	kfree(priv_dev->zlp_buf);
+err3:
+	dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
+			  priv_dev->setup_dma);
+err2:
+	cdns3_free_all_eps(priv_dev);
+err1:
+	cdns->gadget_dev = NULL;
+	return ret;
+}
+
+static int __cdns3_gadget_init(struct cdns3 *cdns)
+{
+	int ret = 0;
+
+	cdns3_drd_switch_gadget(cdns, 1);
+	pm_runtime_get_sync(cdns->dev);
+
+	ret = cdns3_gadget_start(cdns);
+	if (ret)
+		return ret;
+
+	/*
+	 * Because interrupt line can be shared with other components in
+	 * driver it can't use IRQF_ONESHOT flag here.
+	 */
+	ret = devm_request_threaded_irq(cdns->dev, cdns->dev_irq,
+					cdns3_device_irq_handler,
+					cdns3_device_thread_irq_handler,
+					IRQF_SHARED, dev_name(cdns->dev), cdns);
+
+	if (ret)
+		goto err0;
+
+	return 0;
+err0:
+	cdns3_gadget_exit(cdns);
+	return ret;
+}
+
+static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
+{
+	struct cdns3_device *priv_dev = cdns->gadget_dev;
+
+	cdns3_disconnect_gadget(priv_dev);
+
+	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
+	usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
+	cdns3_hw_reset_eps_config(priv_dev);
+
+	/* disable interrupt for device */
+	writel(0, &priv_dev->regs->usb_ien);
+
+	cdns3_gadget_pullup(&priv_dev->gadget, 0);
+
+	return 0;
+}
+
+static int cdns3_gadget_resume(struct cdns3 *cdns, bool hibernated)
+{
+	struct cdns3_device *priv_dev = cdns->gadget_dev;
+
+	if (!priv_dev->gadget_driver)
+		return 0;
+
+	cdns3_gadget_config(priv_dev);
+
+	return 0;
+}
+
+/**
+ * cdns3_gadget_init - initialize device structure
+ *
+ * cdns: cdns3 instance
+ *
+ * This function initializes the gadget.
+ */
+int cdns3_gadget_init(struct cdns3 *cdns)
+{
+	struct cdns3_role_driver *rdrv;
+
+	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
+	if (!rdrv)
+		return -ENOMEM;
+
+	rdrv->start	= __cdns3_gadget_init;
+	rdrv->stop	= cdns3_gadget_exit;
+	rdrv->suspend	= cdns3_gadget_suspend;
+	rdrv->resume	= cdns3_gadget_resume;
+	rdrv->state	= CDNS3_ROLE_STATE_INACTIVE;
+	rdrv->name	= "gadget";
+	cdns->roles[USB_ROLE_DEVICE] = rdrv;
+
+	return 0;
+}
diff --git a/drivers/usb/cdns3/gadget.h b/drivers/usb/cdns3/gadget.h
new file mode 100644
index 000000000000..bc4024041ef2
--- /dev/null
+++ b/drivers/usb/cdns3/gadget.h
@@ -0,0 +1,1338 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * USBSS device controller driver header file
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ *         Pawel Jez <pjez@cadence.com>
+ *         Peter Chen <peter.chen@nxp.com>
+ */
+#ifndef __LINUX_CDNS3_GADGET
+#define __LINUX_CDNS3_GADGET
+#include <linux/usb/gadget.h>
+
+/*
+ * USBSS-DEV register interface.
+ * This corresponds to the USBSS Device Controller Interface
+ */
+
+/**
+ * struct cdns3_usb_regs - device controller registers.
+ * @usb_conf:      Global Configuration.
+ * @usb_sts:       Global Status.
+ * @usb_cmd:       Global Command.
+ * @usb_itpn:      ITP/SOF number.
+ * @usb_lpm:       Global Command.
+ * @usb_ien:       USB Interrupt Enable.
+ * @usb_ists:      USB Interrupt Status.
+ * @ep_sel:        Endpoint Select.
+ * @ep_traddr:     Endpoint Transfer Ring Address.
+ * @ep_cfg:        Endpoint Configuration.
+ * @ep_cmd:        Endpoint Command.
+ * @ep_sts:        Endpoint Status.
+ * @ep_sts_sid:    Endpoint Status.
+ * @ep_sts_en:     Endpoint Status Enable.
+ * @drbl:          Doorbell.
+ * @ep_ien:        EP Interrupt Enable.
+ * @ep_ists:       EP Interrupt Status.
+ * @usb_pwr:       Global Power Configuration.
+ * @usb_conf2:     Global Configuration 2.
+ * @usb_cap1:      Capability 1.
+ * @usb_cap2:      Capability 2.
+ * @usb_cap3:      Capability 3.
+ * @usb_cap4:      Capability 4.
+ * @usb_cap5:      Capability 5.
+ * @usb_cap6:      Capability 6.
+ * @usb_cpkt1:     Custom Packet 1.
+ * @usb_cpkt2:     Custom Packet 2.
+ * @usb_cpkt3:     Custom Packet 3.
+ * @ep_dma_ext_addr: Upper address for DMA operations.
+ * @buf_addr:      Address for On-chip Buffer operations.
+ * @buf_data:      Data for On-chip Buffer operations.
+ * @buf_ctrl:      On-chip Buffer Access Control.
+ * @dtrans:        DMA Transfer Mode.
+ * @tdl_from_trb:  Source of TD Configuration.
+ * @tdl_beh:       TDL Behavior Configuration.
+ * @ep_tdl:        Endpoint TDL.
+ * @tdl_beh2:      TDL Behavior 2 Configuration.
+ * @dma_adv_td:    DMA Advance TD Configuration.
+ * @reserved1:     Reserved.
+ * @cfg_regs:      Configuration.
+ * @reserved2:     Reserved.
+ * @dma_axi_ctrl:  AXI Control.
+ * @dma_axi_id:    AXI ID register.
+ * @dma_axi_cap:   AXI Capability.
+ * @dma_axi_ctrl0: AXI Control 0.
+ * @dma_axi_ctrl1: AXI Control 1.
+ */
+struct cdns3_usb_regs {
+	__le32 usb_conf;
+	__le32 usb_sts;
+	__le32 usb_cmd;
+	__le32 usb_itpn;
+	__le32 usb_lpm;
+	__le32 usb_ien;
+	__le32 usb_ists;
+	__le32 ep_sel;
+	__le32 ep_traddr;
+	__le32 ep_cfg;
+	__le32 ep_cmd;
+	__le32 ep_sts;
+	__le32 ep_sts_sid;
+	__le32 ep_sts_en;
+	__le32 drbl;
+	__le32 ep_ien;
+	__le32 ep_ists;
+	__le32 usb_pwr;
+	__le32 usb_conf2;
+	__le32 usb_cap1;
+	__le32 usb_cap2;
+	__le32 usb_cap3;
+	__le32 usb_cap4;
+	__le32 usb_cap5;
+	__le32 usb_cap6;
+	__le32 usb_cpkt1;
+	__le32 usb_cpkt2;
+	__le32 usb_cpkt3;
+	__le32 ep_dma_ext_addr;
+	__le32 buf_addr;
+	__le32 buf_data;
+	__le32 buf_ctrl;
+	__le32 dtrans;
+	__le32 tdl_from_trb;
+	__le32 tdl_beh;
+	__le32 ep_tdl;
+	__le32 tdl_beh2;
+	__le32 dma_adv_td;
+	__le32 reserved1[26];
+	__le32 cfg_reg1;
+	__le32 dbg_link1;
+	__le32 dbg_link2;
+	__le32 cfg_regs[74];
+	__le32 reserved2[51];
+	__le32 dma_axi_ctrl;
+	__le32 dma_axi_id;
+	__le32 dma_axi_cap;
+	__le32 dma_axi_ctrl0;
+	__le32 dma_axi_ctrl1;
+};
+
+/* USB_CONF - bitmasks */
+/* Reset USB device configuration. */
+#define USB_CONF_CFGRST		BIT(0)
+/* Set Configuration. */
+#define USB_CONF_CFGSET		BIT(1)
+/* Disconnect USB device in SuperSpeed. */
+#define USB_CONF_USB3DIS	BIT(3)
+/* Disconnect USB device in HS/FS */
+#define USB_CONF_USB2DIS	BIT(4)
+/* Little Endian access - default */
+#define USB_CONF_LENDIAN	BIT(5)
+/*
+ * Big Endian access. Driver assume that byte order for
+ * SFRs access always is as Little Endian so this bit
+ * is not used.
+ */
+#define USB_CONF_BENDIAN	BIT(6)
+/* Device software reset. */
+#define USB_CONF_SWRST		BIT(7)
+/* Singular DMA transfer mode. Only for VER < DEV_VER_V3*/
+#define USB_CONF_DSING		BIT(8)
+/* Multiple DMA transfers mode. Only for VER < DEV_VER_V3 */
+#define USB_CONF_DMULT		BIT(9)
+/* DMA clock turn-off enable. */
+#define USB_CONF_DMAOFFEN	BIT(10)
+/* DMA clock turn-off disable. */
+#define USB_CONF_DMAOFFDS	BIT(11)
+/* Clear Force Full Speed. */
+#define USB_CONF_CFORCE_FS	BIT(12)
+/* Set Force Full Speed. */
+#define USB_CONF_SFORCE_FS	BIT(13)
+/* Device enable. */
+#define USB_CONF_DEVEN		BIT(14)
+/* Device disable. */
+#define USB_CONF_DEVDS		BIT(15)
+/* L1 LPM state entry enable (used in HS/FS mode). */
+#define USB_CONF_L1EN		BIT(16)
+/* L1 LPM state entry disable (used in HS/FS mode). */
+#define USB_CONF_L1DS		BIT(17)
+/* USB 2.0 clock gate disable. */
+#define USB_CONF_CLK2OFFEN	BIT(18)
+/* USB 2.0 clock gate enable. */
+#define USB_CONF_CLK2OFFDS	BIT(19)
+/* L0 LPM state entry request (used in HS/FS mode). */
+#define USB_CONF_LGO_L0		BIT(20)
+/* USB 3.0 clock gate disable. */
+#define USB_CONF_CLK3OFFEN	BIT(21)
+/* USB 3.0 clock gate enable. */
+#define USB_CONF_CLK3OFFDS	BIT(22)
+/* Bit 23 is reserved*/
+/* U1 state entry enable (used in SS mode). */
+#define USB_CONF_U1EN		BIT(24)
+/* U1 state entry disable (used in SS mode). */
+#define USB_CONF_U1DS		BIT(25)
+/* U2 state entry enable (used in SS mode). */
+#define USB_CONF_U2EN		BIT(26)
+/* U2 state entry disable (used in SS mode). */
+#define USB_CONF_U2DS		BIT(27)
+/* U0 state entry request (used in SS mode). */
+#define USB_CONF_LGO_U0		BIT(28)
+/* U1 state entry request (used in SS mode). */
+#define USB_CONF_LGO_U1		BIT(29)
+/* U2 state entry request (used in SS mode). */
+#define USB_CONF_LGO_U2		BIT(30)
+/* SS.Inactive state entry request (used in SS mode) */
+#define USB_CONF_LGO_SSINACT	BIT(31)
+
+/* USB_STS - bitmasks */
+/*
+ * Configuration status.
+ * 1 - device is in the configured state.
+ * 0 - device is not configured.
+ */
+#define USB_STS_CFGSTS_MASK	BIT(0)
+#define USB_STS_CFGSTS(p)	((p) & USB_STS_CFGSTS_MASK)
+/*
+ * On-chip memory overflow.
+ * 0 - On-chip memory status OK.
+ * 1 - On-chip memory overflow.
+ */
+#define USB_STS_OV_MASK		BIT(1)
+#define USB_STS_OV(p)		((p) & USB_STS_OV_MASK)
+/*
+ * SuperSpeed connection status.
+ * 0 - USB in SuperSpeed mode disconnected.
+ * 1 - USB in SuperSpeed mode connected.
+ */
+#define USB_STS_USB3CONS_MASK	BIT(2)
+#define USB_STS_USB3CONS(p)	((p) & USB_STS_USB3CONS_MASK)
+/*
+ * DMA transfer configuration status.
+ * 0 - single request.
+ * 1 - multiple TRB chain
+ * Supported only for controller version <  DEV_VER_V3
+ */
+#define USB_STS_DTRANS_MASK	BIT(3)
+#define USB_STS_DTRANS(p)	((p) & USB_STS_DTRANS_MASK)
+/*
+ * Device speed.
+ * 0 - Undefined (value after reset).
+ * 1 - Low speed
+ * 2 - Full speed
+ * 3 - High speed
+ * 4 - Super speed
+ */
+#define USB_STS_USBSPEED_MASK	GENMASK(6, 4)
+#define USB_STS_USBSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) >> 4)
+#define USB_STS_LS		(0x1 << 4)
+#define USB_STS_FS		(0x2 << 4)
+#define USB_STS_HS		(0x3 << 4)
+#define USB_STS_SS		(0x4 << 4)
+#define DEV_UNDEFSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == (0x0 << 4))
+#define DEV_LOWSPEED(p)		(((p) & USB_STS_USBSPEED_MASK) == USB_STS_LS)
+#define DEV_FULLSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_FS)
+#define DEV_HIGHSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_HS)
+#define DEV_SUPERSPEED(p)	(((p) & USB_STS_USBSPEED_MASK) == USB_STS_SS)
+/*
+ * Endianness for SFR access.
+ * 0 - Little Endian order (default after hardware reset).
+ * 1 - Big Endian order
+ */
+#define USB_STS_ENDIAN_MASK	BIT(7)
+#define USB_STS_ENDIAN(p)	((p) & USB_STS_ENDIAN_MASK)
+/*
+ * HS/FS clock turn-off status.
+ * 0 - hsfs clock is always on.
+ * 1 - hsfs clock turn-off in L2 (HS/FS mode) is enabled
+ *          (default after hardware reset).
+ */
+#define USB_STS_CLK2OFF_MASK	BIT(8)
+#define USB_STS_CLK2OFF(p)	((p) & USB_STS_CLK2OFF_MASK)
+/*
+ * PCLK clock turn-off status.
+ * 0 - pclk clock is always on.
+ * 1 - pclk clock turn-off in U3 (SS mode) is enabled
+ *          (default after hardware reset).
+ */
+#define USB_STS_CLK3OFF_MASK	BIT(9)
+#define USB_STS_CLK3OFF(p)	((p) & USB_STS_CLK3OFF_MASK)
+/*
+ * Controller in reset state.
+ * 0 - Internal reset is active.
+ * 1 - Internal reset is not active and controller is fully operational.
+ */
+#define USB_STS_IN_RST_MASK	BIT(10)
+#define USB_STS_IN_RST(p)	((p) & USB_STS_IN_RST_MASK)
+/*
+ * Status of the "TDL calculation basing on TRB" feature.
+ * 0 - disabled
+ * 1 - enabled
+ * Supported only for DEV_VER_V2 controller version.
+ */
+#define USB_STS_TDL_TRB_ENABLED	BIT(11)
+/*
+ * Device enable Status.
+ * 0 - USB device is disabled (VBUS input is disconnected from internal logic).
+ * 1 - USB device is enabled (VBUS input is connected to the internal logic).
+ */
+#define USB_STS_DEVS_MASK	BIT(14)
+#define USB_STS_DEVS(p)		((p) & USB_STS_DEVS_MASK)
+/*
+ * Address status.
+ * 0 - USB device is default state.
+ * 1 - USB device is at least in address state.
+ */
+#define USB_STS_ADDRESSED_MASK	BIT(15)
+#define USB_STS_ADDRESSED(p)	((p) & USB_STS_ADDRESSED_MASK)
+/*
+ * L1 LPM state enable status (used in HS/FS mode).
+ * 0 - Entering to L1 LPM state disabled.
+ * 1 - Entering to L1 LPM state enabled.
+ */
+#define USB_STS_L1ENS_MASK	BIT(16)
+#define USB_STS_L1ENS(p)	((p) & USB_STS_L1ENS_MASK)
+/*
+ * Internal VBUS connection status (used both in HS/FS  and SS mode).
+ * 0 - internal VBUS is not detected.
+ * 1 - internal VBUS is detected.
+ */
+#define USB_STS_VBUSS_MASK	BIT(17)
+#define USB_STS_VBUSS(p)	((p) & USB_STS_VBUSS_MASK)
+/*
+ * HS/FS LPM  state (used in FS/HS mode).
+ * 0 - L0 State
+ * 1 - L1 State
+ * 2 - L2 State
+ * 3 - L3 State
+ */
+#define USB_STS_LPMST_MASK	GENMASK(19, 18)
+#define DEV_L0_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x0 << 18))
+#define DEV_L1_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x1 << 18))
+#define DEV_L2_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x2 << 18))
+#define DEV_L3_STATE(p)		(((p) & USB_STS_LPMST_MASK) == (0x3 << 18))
+/*
+ * Disable HS status (used in FS/HS mode).
+ * 0 - the disconnect bit for HS/FS mode is set .
+ * 1 - the disconnect bit for HS/FS mode is not set.
+ */
+#define USB_STS_USB2CONS_MASK	BIT(20)
+#define USB_STS_USB2CONS(p)	((p) & USB_STS_USB2CONS_MASK)
+/*
+ * HS/FS mode connection status (used in FS/HS mode).
+ * 0 - High Speed operations in USB2.0 (FS/HS) mode not disabled.
+ * 1 - High Speed operations in USB2.0 (FS/HS).
+ */
+#define USB_STS_DISABLE_HS_MASK	BIT(21)
+#define USB_STS_DISABLE_HS(p)	((p) & USB_STS_DISABLE_HS_MASK)
+/*
+ * U1 state enable status (used in SS mode).
+ * 0 - Entering to  U1 state disabled.
+ * 1 - Entering to  U1 state enabled.
+ */
+#define USB_STS_U1ENS_MASK	BIT(24)
+#define USB_STS_U1ENS(p)	((p) & USB_STS_U1ENS_MASK)
+/*
+ * U2 state enable status (used in SS mode).
+ * 0 - Entering to  U2 state disabled.
+ * 1 - Entering to  U2 state enabled.
+ */
+#define USB_STS_U2ENS_MASK	BIT(25)
+#define USB_STS_U2ENS(p)	((p) & USB_STS_U2ENS_MASK)
+/*
+ * SuperSpeed Link LTSSM state. This field reflects USBSS-DEV current
+ * SuperSpeed link state
+ */
+#define USB_STS_LST_MASK	GENMASK(29, 26)
+#define DEV_LST_U0		(((p) & USB_STS_LST_MASK) == (0x0 << 26))
+#define DEV_LST_U1		(((p) & USB_STS_LST_MASK) == (0x1 << 26))
+#define DEV_LST_U2		(((p) & USB_STS_LST_MASK) == (0x2 << 26))
+#define DEV_LST_U3		(((p) & USB_STS_LST_MASK) == (0x3 << 26))
+#define DEV_LST_DISABLED	(((p) & USB_STS_LST_MASK) == (0x4 << 26))
+#define DEV_LST_RXDETECT	(((p) & USB_STS_LST_MASK) == (0x5 << 26))
+#define DEV_LST_INACTIVE	(((p) & USB_STS_LST_MASK) == (0x6 << 26))
+#define DEV_LST_POLLING		(((p) & USB_STS_LST_MASK) == (0x7 << 26))
+#define DEV_LST_RECOVERY	(((p) & USB_STS_LST_MASK) == (0x8 << 26))
+#define DEV_LST_HOT_RESET	(((p) & USB_STS_LST_MASK) == (0x9 << 26))
+#define DEV_LST_COMP_MODE	(((p) & USB_STS_LST_MASK) == (0xa << 26))
+#define DEV_LST_LB_STATE	(((p) & USB_STS_LST_MASK) == (0xb << 26))
+/*
+ * DMA clock turn-off status.
+ * 0 - DMA clock is always on (default after hardware reset).
+ * 1 - DMA clock turn-off in U1, U2 and U3 (SS mode) is enabled.
+ */
+#define USB_STS_DMAOFF_MASK	BIT(30)
+#define USB_STS_DMAOFF(p)	((p) & USB_STS_DMAOFF_MASK)
+/*
+ * SFR Endian status.
+ * 0 - Little Endian order (default after hardware reset).
+ * 1 - Big Endian order.
+ */
+#define USB_STS_ENDIAN2_MASK	BIT(31)
+#define USB_STS_ENDIAN2(p)	((p) & USB_STS_ENDIAN2_MASK)
+
+/* USB_CMD -  bitmasks */
+/* Set Function Address */
+#define USB_CMD_SET_ADDR	BIT(0)
+/*
+ * Function Address This field is saved to the device only when the field
+ * SET_ADDR is set '1 ' during write to USB_CMD register.
+ * Software is responsible for entering the address of the device during
+ * SET_ADDRESS request service. This field should be set immediately after
+ * the SETUP packet is decoded, and prior to confirmation of the status phase
+ */
+#define USB_CMD_FADDR_MASK	GENMASK(7, 1)
+#define USB_CMD_FADDR(p)	(((p) << 1) & USB_CMD_FADDR_MASK)
+/* Send Function Wake Device Notification TP (used only in SS mode). */
+#define USB_CMD_SDNFW		BIT(8)
+/* Set Test Mode (used only in HS/FS mode). */
+#define USB_CMD_STMODE		BIT(9)
+/* Test mode selector (used only in HS/FS mode) */
+#define USB_STS_TMODE_SEL_MASK	GENMASK(11, 10)
+#define USB_STS_TMODE_SEL(p)	(((p) << 10) & USB_STS_TMODE_SEL_MASK)
+/*
+ *  Send Latency Tolerance Message Device Notification TP (used only
+ *  in SS mode).
+ */
+#define USB_CMD_SDNLTM		BIT(12)
+/* Send Custom Transaction Packet (used only in SS mode) */
+#define USB_CMD_SPKT		BIT(13)
+/*Device Notification 'Function Wake' - Interface value (only in SS mode. */
+#define USB_CMD_DNFW_INT_MASK	GENMASK(23, 16)
+#define USB_STS_DNFW_INT(p)	(((p) << 16) & USB_CMD_DNFW_INT_MASK)
+/*
+ * Device Notification 'Latency Tolerance Message' -373 BELT value [7:0]
+ * (used only in SS mode).
+ */
+#define USB_CMD_DNLTM_BELT_MASK	GENMASK(27, 16)
+#define USB_STS_DNLTM_BELT(p)	(((p) << 16) & USB_CMD_DNLTM_BELT_MASK)
+
+/* USB_ITPN - bitmasks */
+/*
+ * ITP(SS) / SOF (HS/FS) number
+ * In SS mode this field represent number of last ITP received from host.
+ * In HS/FS mode this field represent number of last SOF received from host.
+ */
+#define USB_ITPN_MASK		GENMASK(13, 0)
+#define USB_ITPN(p)		((p) & USB_ITPN_MASK)
+
+/* USB_LPM - bitmasks */
+/* Host Initiated Resume Duration. */
+#define USB_LPM_HIRD_MASK	GENMASK(3, 0)
+#define USB_LPM_HIRD(p)		((p) & USB_LPM_HIRD_MASK)
+/* Remote Wakeup Enable (bRemoteWake). */
+#define USB_LPM_BRW		BIT(4)
+
+/* USB_IEN - bitmasks */
+/* SS connection interrupt enable */
+#define USB_IEN_CONIEN		BIT(0)
+/* SS disconnection interrupt enable. */
+#define USB_IEN_DISIEN		BIT(1)
+/* USB SS warm reset interrupt enable. */
+#define USB_IEN_UWRESIEN	BIT(2)
+/* USB SS hot reset interrupt enable */
+#define USB_IEN_UHRESIEN	BIT(3)
+/* SS link U3 state enter interrupt enable (suspend).*/
+#define USB_IEN_U3ENTIEN	BIT(4)
+/* SS link U3 state exit interrupt enable (wakeup). */
+#define USB_IEN_U3EXTIEN	BIT(5)
+/* SS link U2 state enter interrupt enable.*/
+#define USB_IEN_U2ENTIEN	BIT(6)
+/* SS link U2 state exit interrupt enable.*/
+#define USB_IEN_U2EXTIEN	BIT(7)
+/* SS link U1 state enter interrupt enable.*/
+#define USB_IEN_U1ENTIEN	BIT(8)
+/* SS link U1 state exit interrupt enable.*/
+#define USB_IEN_U1EXTIEN	BIT(9)
+/* ITP/SOF packet detected interrupt enable.*/
+#define USB_IEN_ITPIEN		BIT(10)
+/* Wakeup interrupt enable.*/
+#define USB_IEN_WAKEIEN		BIT(11)
+/* Send Custom Packet interrupt enable.*/
+#define USB_IEN_SPKTIEN		BIT(12)
+/* HS/FS mode connection interrupt enable.*/
+#define USB_IEN_CON2IEN		BIT(16)
+/* HS/FS mode disconnection interrupt enable.*/
+#define USB_IEN_DIS2IEN		BIT(17)
+/* USB reset (HS/FS mode) interrupt enable.*/
+#define USB_IEN_U2RESIEN	BIT(18)
+/* LPM L2 state enter interrupt enable.*/
+#define USB_IEN_L2ENTIEN	BIT(20)
+/* LPM  L2 state exit interrupt enable.*/
+#define USB_IEN_L2EXTIEN	BIT(21)
+/* LPM L1 state enter interrupt enable.*/
+#define USB_IEN_L1ENTIEN	BIT(24)
+/* LPM  L1 state exit interrupt enable.*/
+#define USB_IEN_L1EXTIEN	BIT(25)
+/* Configuration reset interrupt enable.*/
+#define USB_IEN_CFGRESIEN	BIT(26)
+/* Start of the USB SS warm reset interrupt enable.*/
+#define USB_IEN_UWRESSIEN	BIT(28)
+/* End of the USB SS warm reset interrupt enable.*/
+#define USB_IEN_UWRESEIEN	BIT(29)
+
+#define USB_IEN_INIT  (USB_IEN_U2RESIEN | USB_ISTS_DIS2I | USB_IEN_CON2IEN \
+		       | USB_IEN_UHRESIEN | USB_IEN_UWRESIEN | USB_IEN_DISIEN \
+		       | USB_IEN_CONIEN | USB_IEN_U3EXTIEN | USB_IEN_L2ENTIEN \
+		       | USB_IEN_L2EXTIEN | USB_IEN_L1ENTIEN | USB_IEN_U3ENTIEN)
+
+/* USB_ISTS - bitmasks */
+/* SS Connection detected. */
+#define USB_ISTS_CONI		BIT(0)
+/* SS Disconnection detected. */
+#define USB_ISTS_DISI		BIT(1)
+/* UUSB warm reset detectede. */
+#define USB_ISTS_UWRESI		BIT(2)
+/* USB hot reset detected. */
+#define USB_ISTS_UHRESI		BIT(3)
+/* U3 link state enter detected (suspend).*/
+#define USB_ISTS_U3ENTI		BIT(4)
+/* U3 link state exit detected (wakeup). */
+#define USB_ISTS_U3EXTI		BIT(5)
+/* U2 link state enter detected.*/
+#define USB_ISTS_U2ENTI		BIT(6)
+/* U2 link state exit detected.*/
+#define USB_ISTS_U2EXTI		BIT(7)
+/* U1 link state enter detected.*/
+#define USB_ISTS_U1ENTI		BIT(8)
+/* U1 link state exit detected.*/
+#define USB_ISTS_U1EXTI		BIT(9)
+/* ITP/SOF packet detected.*/
+#define USB_ISTS_ITPI		BIT(10)
+/* Wakeup detected.*/
+#define USB_ISTS_WAKEI		BIT(11)
+/* Send Custom Packet detected.*/
+#define USB_ISTS_SPKTI		BIT(12)
+/* HS/FS mode connection detected.*/
+#define USB_ISTS_CON2I		BIT(16)
+/* HS/FS mode disconnection detected.*/
+#define USB_ISTS_DIS2I		BIT(17)
+/* USB reset (HS/FS mode) detected.*/
+#define USB_ISTS_U2RESI		BIT(18)
+/* LPM L2 state enter detected.*/
+#define USB_ISTS_L2ENTI		BIT(20)
+/* LPM  L2 state exit detected.*/
+#define USB_ISTS_L2EXTI		BIT(21)
+/* LPM L1 state enter detected.*/
+#define USB_ISTS_L1ENTI		BIT(24)
+/* LPM L1 state exit detected.*/
+#define USB_ISTS_L1EXTI		BIT(25)
+/* USB configuration reset detected.*/
+#define USB_ISTS_CFGRESI	BIT(26)
+/* Start of the USB warm reset detected.*/
+#define USB_ISTS_UWRESSI	BIT(28)
+/* End of the USB warm reset detected.*/
+#define USB_ISTS_UWRESEI	BIT(29)
+
+/* USB_SEL - bitmasks */
+#define EP_SEL_EPNO_MASK	GENMASK(3, 0)
+/* Endpoint number. */
+#define EP_SEL_EPNO(p)		((p) & EP_SEL_EPNO_MASK)
+/* Endpoint direction bit - 0 - OUT, 1 - IN. */
+#define EP_SEL_DIR		BIT(7)
+
+#define select_ep_in(nr)	(EP_SEL_EPNO(p) | EP_SEL_DIR)
+#define select_ep_out		(EP_SEL_EPNO(p))
+
+/* EP_TRADDR - bitmasks */
+/* Transfer Ring address. */
+#define EP_TRADDR_TRADDR(p)	((p))
+
+/* EP_CFG - bitmasks */
+/* Endpoint enable */
+#define EP_CFG_ENABLE		BIT(0)
+/*
+ *  Endpoint type.
+ * 1 - isochronous
+ * 2 - bulk
+ * 3 - interrupt
+ */
+#define EP_CFG_EPTYPE_MASK	GENMASK(2, 1)
+#define EP_CFG_EPTYPE(p)	(((p) << 1)  & EP_CFG_EPTYPE_MASK)
+/* Stream support enable (only in SS mode). */
+#define EP_CFG_STREAM_EN	BIT(3)
+/* TDL check (only in SS mode for BULK EP). */
+#define EP_CFG_TDL_CHK		BIT(4)
+/* SID check (only in SS mode for BULK OUT EP). */
+#define EP_CFG_SID_CHK		BIT(5)
+/* DMA transfer endianness. */
+#define EP_CFG_EPENDIAN		BIT(7)
+/* Max burst size (used only in SS mode). */
+#define EP_CFG_MAXBURST_MASK	GENMASK(11, 8)
+#define EP_CFG_MAXBURST(p)	(((p) << 8) & EP_CFG_MAXBURST_MASK)
+/* ISO max burst. */
+#define EP_CFG_MULT_MASK	GENMASK(15, 14)
+#define EP_CFG_MULT(p)		(((p) << 14) & EP_CFG_MULT_MASK)
+/* ISO max burst. */
+#define EP_CFG_MAXPKTSIZE_MASK	GENMASK(26, 16)
+#define EP_CFG_MAXPKTSIZE(p)	(((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
+/* Max number of buffered packets. */
+#define EP_CFG_BUFFERING_MASK	GENMASK(31, 27)
+#define EP_CFG_BUFFERING(p)	(((p) << 27) & EP_CFG_BUFFERING_MASK)
+
+/* EP_CMD - bitmasks */
+/* Endpoint reset. */
+#define EP_CMD_EPRST		BIT(0)
+/* Endpoint STALL set. */
+#define EP_CMD_SSTALL		BIT(1)
+/* Endpoint STALL clear. */
+#define EP_CMD_CSTALL		BIT(2)
+/* Send ERDY TP. */
+#define EP_CMD_ERDY		BIT(3)
+/* Request complete. */
+#define EP_CMD_REQ_CMPL		BIT(5)
+/* Transfer descriptor ready. */
+#define EP_CMD_DRDY		BIT(6)
+/* Data flush. */
+#define EP_CMD_DFLUSH		BIT(7)
+/*
+ * Transfer Descriptor Length write  (used only for Bulk Stream capable
+ * endpoints in SS mode).
+ * Bit Removed from DEV_VER_V3 controller version.
+ */
+#define EP_CMD_STDL		BIT(8)
+/*
+ * Transfer Descriptor Length (used only in SS mode for bulk endpoints).
+ * Bits Removed from DEV_VER_V3 controller version.
+ */
+#define EP_CMD_TDL_MASK		GENMASK(15, 9)
+#define EP_CMD_TDL_SET(p)	(((p) << 9) & EP_CMD_TDL_MASK)
+#define EP_CMD_TDL_GET(p)	(((p) & EP_CMD_TDL_MASK) >> 9)
+
+/* ERDY Stream ID value (used in SS mode). */
+#define EP_CMD_ERDY_SID_MASK	GENMASK(31, 16)
+#define EP_CMD_ERDY_SID(p)	(((p) << 16) & EP_CMD_ERDY_SID_MASK)
+
+/* EP_STS - bitmasks */
+/* Setup transfer complete. */
+#define EP_STS_SETUP		BIT(0)
+/* Endpoint STALL status. */
+#define EP_STS_STALL(p)		((p) & BIT(1))
+/* Interrupt On Complete. */
+#define EP_STS_IOC		BIT(2)
+/* Interrupt on Short Packet. */
+#define EP_STS_ISP		BIT(3)
+/* Transfer descriptor missing. */
+#define EP_STS_DESCMIS		BIT(4)
+/* Stream Rejected (used only in SS mode) */
+#define EP_STS_STREAMR		BIT(5)
+/* EXIT from MOVE DATA State (used only for stream transfers in SS mode). */
+#define EP_STS_MD_EXIT		BIT(6)
+/* TRB error. */
+#define EP_STS_TRBERR		BIT(7)
+/* Not ready (used only in SS mode). */
+#define EP_STS_NRDY		BIT(8)
+/* DMA busy bit. */
+#define EP_STS_DBUSY		BIT(9)
+/* Endpoint Buffer Empty */
+#define EP_STS_BUFFEMPTY(p)	((p) & BIT(10))
+/* Current Cycle Status */
+#define EP_STS_CCS(p)		((p) & BIT(11))
+/* Prime (used only in SS mode. */
+#define EP_STS_PRIME		BIT(12)
+/* Stream error (used only in SS mode). */
+#define EP_STS_SIDERR		BIT(13)
+/* OUT size mismatch. */
+#define EP_STS_OUTSMM		BIT(14)
+/* ISO transmission error. */
+#define EP_STS_ISOERR		BIT(15)
+/* Host Packet Pending (only for SS mode). */
+#define EP_STS_HOSTPP(p)	((p) & BIT(16))
+/* Stream Protocol State Machine State (only for Bulk stream endpoints). */
+#define EP_STS_SPSMST_MASK		GENMASK(18, 17)
+#define EP_STS_SPSMST_DISABLED(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
+#define EP_STS_SPSMST_IDLE(p)		(((p) & EP_STS_SPSMST_MASK) >> 17)
+#define EP_STS_SPSMST_START_STREAM(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
+#define EP_STS_SPSMST_MOVE_DATA(p)	(((p) & EP_STS_SPSMST_MASK) >> 17)
+/* Interrupt On Transfer complete. */
+#define EP_STS_IOT		BIT(19)
+/* OUT queue endpoint number. */
+#define EP_STS_OUTQ_NO_MASK	GENMASK(27, 24)
+#define EP_STS_OUTQ_NO(p)	(((p) & EP_STS_OUTQ_NO_MASK) >> 24)
+/* OUT queue valid flag. */
+#define EP_STS_OUTQ_VAL_MASK	BIT(28)
+#define EP_STS_OUTQ_VAL(p)	((p) & EP_STS_OUTQ_VAL_MASK)
+/* SETUP WAIT. */
+#define EP_STS_STPWAIT		BIT(31)
+
+/* EP_STS_SID - bitmasks */
+/* Stream ID (used only in SS mode). */
+#define EP_STS_SID_MASK		GENMASK(15, 0)
+#define EP_STS_SID(p)		((p) & EP_STS_SID_MASK)
+
+/* EP_STS_EN - bitmasks */
+/* SETUP interrupt enable. */
+#define EP_STS_EN_SETUPEN	BIT(0)
+/* OUT transfer missing descriptor enable. */
+#define EP_STS_EN_DESCMISEN	BIT(4)
+/* Stream Rejected enable. */
+#define EP_STS_EN_STREAMREN	BIT(5)
+/* Move Data Exit enable.*/
+#define EP_STS_EN_MD_EXITEN	BIT(6)
+/* TRB enable. */
+#define EP_STS_EN_TRBERREN	BIT(7)
+/* NRDY enable. */
+#define EP_STS_EN_NRDYEN	BIT(8)
+/* Prime enable. */
+#define EP_STS_EN_PRIMEEEN	BIT(12)
+/* Stream error enable. */
+#define EP_STS_EN_SIDERREN	BIT(13)
+/* OUT size mismatch enable. */
+#define EP_STS_EN_OUTSMMEN	BIT(14)
+/* ISO transmission error enable. */
+#define EP_STS_EN_ISOERREN	BIT(15)
+/* Interrupt on Transmission complete enable. */
+#define EP_STS_EN_IOTEN		BIT(19)
+/* Setup Wait interrupt enable. */
+#define EP_STS_EN_STPWAITEN	BIT(31)
+
+/* DRBL- bitmasks */
+#define DB_VALUE_BY_INDEX(index) (1 << (index))
+#define DB_VALUE_EP0_OUT	BIT(0)
+#define DB_VALUE_EP0_IN		BIT(16)
+
+/* EP_IEN - bitmasks */
+#define EP_IEN(index)		(1 << (index))
+#define EP_IEN_EP_OUT0		BIT(0)
+#define EP_IEN_EP_IN0		BIT(16)
+
+/* EP_ISTS - bitmasks */
+#define EP_ISTS(index)		(1 << (index))
+#define EP_ISTS_EP_OUT0		BIT(0)
+#define EP_ISTS_EP_IN0		BIT(16)
+
+/* USB_PWR- bitmasks */
+/*Power Shut Off capability enable*/
+#define PUSB_PWR_PSO_EN		BIT(0)
+/*Power Shut Off capability disable*/
+#define PUSB_PWR_PSO_DS		BIT(1)
+/*
+ * Enables turning-off Reference Clock.
+ * This bit is optional and implemented only when support for OTG is
+ * implemented (indicated by OTG_READY bit set to '1').
+ */
+#define PUSB_PWR_STB_CLK_SWITCH_EN	BIT(8)
+/*
+ * Status bit indicating that operation required by STB_CLK_SWITCH_EN write
+ * is completed
+ */
+#define PUSB_PWR_STB_CLK_SWITCH_DONE	BIT(9)
+/* This bit informs if Fast Registers Access is enabled. */
+#define PUSB_PWR_FST_REG_ACCESS_STAT	BIT(30)
+/* Fast Registers Access Enable. */
+#define PUSB_PWR_FST_REG_ACCESS		BIT(31)
+
+/* USB_CONF2- bitmasks */
+/*
+ * Writing 1 disables TDL calculation basing on TRB feature in controller
+ * for DMULT mode.
+ * Bit supported only for DEV_VER_V2 version.
+ */
+#define USB_CONF2_DIS_TDL_TRB		BIT(1)
+/*
+ * Writing 1 enables TDL calculation basing on TRB feature in controller
+ * for DMULT mode.
+ * Bit supported only for DEV_VER_V2 version.
+ */
+#define USB_CONF2_EN_TDL_TRB		BIT(2)
+
+/* USB_CAP1- bitmasks */
+/*
+ * SFR Interface type
+ * These field reflects type of SFR interface implemented:
+ * 0x0 - OCP
+ * 0x1 - AHB,
+ * 0x2 - PLB
+ * 0x3 - AXI
+ * 0x4-0xF - reserved
+ */
+#define USB_CAP1_SFR_TYPE_MASK	GENMASK(3, 0)
+#define DEV_SFR_TYPE_OCP(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x0)
+#define DEV_SFR_TYPE_AHB(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x1)
+#define DEV_SFR_TYPE_PLB(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x2)
+#define DEV_SFR_TYPE_AXI(p)	(((p) & USB_CAP1_SFR_TYPE_MASK) == 0x3)
+/*
+ * SFR Interface width
+ * These field reflects width of SFR interface implemented:
+ * 0x0 - 8 bit interface,
+ * 0x1 - 16 bit interface,
+ * 0x2 - 32 bit interface
+ * 0x3 - 64 bit interface
+ * 0x4-0xF - reserved
+ */
+#define USB_CAP1_SFR_WIDTH_MASK	GENMASK(7, 4)
+#define DEV_SFR_WIDTH_8(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x0 << 4))
+#define DEV_SFR_WIDTH_16(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x1 << 4))
+#define DEV_SFR_WIDTH_32(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x2 << 4))
+#define DEV_SFR_WIDTH_64(p)	(((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x3 << 4))
+/*
+ * DMA Interface type
+ * These field reflects type of DMA interface implemented:
+ * 0x0 - OCP
+ * 0x1 - AHB,
+ * 0x2 - PLB
+ * 0x3 - AXI
+ * 0x4-0xF - reserved
+ */
+#define USB_CAP1_DMA_TYPE_MASK	GENMASK(11, 8)
+#define DEV_DMA_TYPE_OCP(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x0 << 8))
+#define DEV_DMA_TYPE_AHB(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x1 << 8))
+#define DEV_DMA_TYPE_PLB(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x2 << 8))
+#define DEV_DMA_TYPE_AXI(p)	(((p) & USB_CAP1_DMA_TYPE_MASK) == (0x3 << 8))
+/*
+ * DMA Interface width
+ * These field reflects width of DMA interface implemented:
+ * 0x0 - reserved,
+ * 0x1 - reserved,
+ * 0x2 - 32 bit interface
+ * 0x3 - 64 bit interface
+ * 0x4-0xF - reserved
+ */
+#define USB_CAP1_DMA_WIDTH_MASK	GENMASK(15, 12)
+#define DEV_DMA_WIDTH_32(p)	(((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x2 << 12))
+#define DEV_DMA_WIDTH_64(p)	(((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x3 << 12))
+/*
+ * USB3 PHY Interface type
+ * These field reflects type of USB3 PHY interface implemented:
+ * 0x0 - USB PIPE,
+ * 0x1 - RMMI,
+ * 0x2-0xF - reserved
+ */
+#define USB_CAP1_U3PHY_TYPE_MASK GENMASK(19, 16)
+#define DEV_U3PHY_PIPE(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x0 << 16))
+#define DEV_U3PHY_RMMI(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x1 << 16))
+/*
+ * USB3 PHY Interface width
+ * These field reflects width of USB3 PHY interface implemented:
+ * 0x0 - 8 bit PIPE interface,
+ * 0x1 - 16 bit PIPE interface,
+ * 0x2 - 32 bit PIPE interface,
+ * 0x3 - 64 bit PIPE interface
+ * 0x4-0xF - reserved
+ * Note: When SSIC interface is implemented this field shows the width of
+ * internal PIPE interface. The RMMI interface is always 20bit wide.
+ */
+#define USB_CAP1_U3PHY_WIDTH_MASK GENMASK(23, 20)
+#define DEV_U3PHY_WIDTH_8(p) \
+	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x0 << 20))
+#define DEV_U3PHY_WIDTH_16(p) \
+	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x1 << 16))
+#define DEV_U3PHY_WIDTH_32(p) \
+	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x2 << 20))
+#define DEV_U3PHY_WIDTH_64(p) \
+	(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x3 << 16))
+
+/*
+ * USB2 PHY Interface enable
+ * These field informs if USB2 PHY interface is implemented:
+ * 0x0 - interface NOT implemented,
+ * 0x1 - interface implemented
+ */
+#define USB_CAP1_U2PHY_EN(p)	((p) & BIT(24))
+/*
+ * USB2 PHY Interface type
+ * These field reflects type of USB2 PHY interface implemented:
+ * 0x0 - UTMI,
+ * 0x1 - ULPI
+ */
+#define DEV_U2PHY_ULPI(p)	((p) & BIT(25))
+/*
+ * USB2 PHY Interface width
+ * These field reflects width of USB2 PHY interface implemented:
+ * 0x0 - 8 bit interface,
+ * 0x1 - 16 bit interface,
+ * Note: The ULPI interface is always 8bit wide.
+ */
+#define DEV_U2PHY_WIDTH_16(p)	((p) & BIT(26))
+/*
+ * OTG Ready
+ * 0x0 - pure device mode
+ * 0x1 - some features and ports for CDNS USB OTG controller are implemented.
+ */
+#define USB_CAP1_OTG_READY(p)	((p) & BIT(27))
+
+/*
+ * When set, indicates that controller supports automatic internal TDL
+ * calculation basing on the size provided in TRB (TRB[22:17]) for DMULT mode
+ * Supported only for DEV_VER_V2 controller version.
+ */
+#define USB_CAP1_TDL_FROM_TRB(p)	((p) & BIT(28))
+
+/* USB_CAP2- bitmasks */
+/*
+ * The actual size of the connected On-chip RAM memory in kB:
+ * - 0 means 256 kB (max supported mem size)
+ * - value other than 0 reflects the mem size in kB
+ */
+#define USB_CAP2_ACTUAL_MEM_SIZE(p) ((p) & GENMASK(7, 0))
+/*
+ * Max supported mem size
+ * These field reflects width of on-chip RAM address bus width,
+ * which determines max supported mem size:
+ * 0x0-0x7 - reserved,
+ * 0x8 - support for 4kB mem,
+ * 0x9 - support for 8kB mem,
+ * 0xA - support for 16kB mem,
+ * 0xB - support for 32kB mem,
+ * 0xC - support for 64kB mem,
+ * 0xD - support for 128kB mem,
+ * 0xE - support for 256kB mem,
+ * 0xF - reserved
+ */
+#define USB_CAP2_MAX_MEM_SIZE(p) ((p) & GENMASK(11, 8))
+
+/* USB_CAP3- bitmasks */
+#define EP_IS_IMPLEMENTED(reg, index) ((reg) & (1 << (index)))
+
+/* USB_CAP4- bitmasks */
+#define EP_SUPPORT_ISO(reg, index) ((reg) & (1 << (index)))
+
+/* USB_CAP5- bitmasks */
+#define EP_SUPPORT_STREAM(reg, index) ((reg) & (1 << (index)))
+
+/* USB_CAP6- bitmasks */
+/* The USBSS-DEV Controller  Internal build number. */
+#define GET_DEV_BASE_VERSION(p) ((p) & GENMASK(23, 0))
+/* The USBSS-DEV Controller version number. */
+#define GET_DEV_CUSTOM_VERSION(p) ((p) & GENMASK(31, 24))
+
+#define DEV_VER_NXP_V1		0x00024502
+#define DEV_VER_TI_V1		0x00024509
+#define DEV_VER_V2		0x0002450C
+#define DEV_VER_V3		0x0002450d
+
+/* DBG_LINK1- bitmasks */
+/*
+ * LFPS_MIN_DET_U1_EXIT value This parameter configures the minimum
+ * time required for decoding the received LFPS as an LFPS.U1_Exit.
+ */
+#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT(p)	((p) & GENMASK(7, 0))
+/*
+ * LFPS_MIN_GEN_U1_EXIT value This parameter configures the minimum time for
+ * phytxelecidle deassertion when LFPS.U1_Exit
+ */
+#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK	GENMASK(15, 8)
+#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(p)	(((p) << 8) & GENMASK(15, 8))
+/*
+ * RXDET_BREAK_DIS value This parameter configures terminating the Far-end
+ * Receiver termination detection sequence:
+ * 0: it is possible that USBSS_DEV will terminate Farend receiver
+ *    termination detection sequence
+ * 1: USBSS_DEV will not terminate Far-end receiver termination
+ *    detection sequence
+ */
+#define DBG_LINK1_RXDET_BREAK_DIS		BIT(16)
+/* LFPS_GEN_PING value This parameter configures the LFPS.Ping generation */
+#define DBG_LINK1_LFPS_GEN_PING(p)		(((p) << 17) & GENMASK(21, 17))
+/*
+ * Set the LFPS_MIN_DET_U1_EXIT value Writing '1' to this bit writes the
+ * LFPS_MIN_DET_U1_EXIT field value to the device. This bit is automatically
+ * cleared. Writing '0' has no effect
+ */
+#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT_SET	BIT(24)
+/*
+ * Set the LFPS_MIN_GEN_U1_EXIT value. Writing '1' to this bit writes the
+ * LFPS_MIN_GEN_U1_EXIT field value to the device. This bit is automatically
+ * cleared. Writing '0' has no effect
+ */
+#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET	BIT(25)
+/*
+ * Set the RXDET_BREAK_DIS value Writing '1' to this bit writes
+ * the RXDET_BREAK_DIS field value to the device. This bit is automatically
+ * cleared. Writing '0' has no effect
+ */
+#define DBG_LINK1_RXDET_BREAK_DIS_SET		BIT(26)
+/*
+ * Set the LFPS_GEN_PING_SET value Writing '1' to this bit writes
+ * the LFPS_GEN_PING field value to the device. This bit is automatically
+ * cleared. Writing '0' has no effect."
+ */
+#define DBG_LINK1_LFPS_GEN_PING_SET		BIT(27)
+
+/* DMA_AXI_CTRL- bitmasks */
+/* The mawprot pin configuration. */
+#define DMA_AXI_CTRL_MARPROT(p) ((p) & GENMASK(2, 0))
+/* The marprot pin configuration. */
+#define DMA_AXI_CTRL_MAWPROT(p) (((p) & GENMASK(2, 0)) << 16)
+#define DMA_AXI_CTRL_NON_SECURE 0x02
+
+#define gadget_to_cdns3_device(g) (container_of(g, struct cdns3_device, gadget))
+
+#define ep_to_cdns3_ep(ep) (container_of(ep, struct cdns3_endpoint, endpoint))
+
+/*-------------------------------------------------------------------------*/
+/*
+ * USBSS-DEV DMA interface.
+ */
+#define TRBS_PER_SEGMENT	40
+
+#define ISO_MAX_INTERVAL	10
+
+#if TRBS_PER_SEGMENT < 2
+#error "Incorrect TRBS_PER_SEGMENT. Minimal Transfer Ring size is 2."
+#endif
+
+/*
+ *Only for ISOC endpoints - maximum number of TRBs is calculated as
+ * pow(2, bInterval-1) * number of usb requests. It is limitation made by
+ * driver to save memory. Controller must prepare TRB for each ITP even
+ * if bInterval > 1. It's the reason why driver needs so many TRBs for
+ * isochronous endpoints.
+ */
+#define TRBS_PER_ISOC_SEGMENT	(ISO_MAX_INTERVAL * 8)
+
+#define GET_TRBS_PER_SEGMENT(ep_type) ((ep_type) == USB_ENDPOINT_XFER_ISOC ? \
+				      TRBS_PER_ISOC_SEGMENT : TRBS_PER_SEGMENT)
+/**
+ * struct cdns3_trb - represent Transfer Descriptor block.
+ * @buffer:	pointer to buffer data
+ * @length:	length of data
+ * @control:	control flags.
+ *
+ * This structure describes transfer block serviced by DMA module.
+ */
+struct cdns3_trb {
+	__le32 buffer;
+	__le32 length;
+	__le32 control;
+};
+
+#define TRB_SIZE		(sizeof(struct cdns3_trb))
+#define TRB_RING_SIZE		(TRB_SIZE * TRBS_PER_SEGMENT)
+#define TRB_ISO_RING_SIZE	(TRB_SIZE * TRBS_PER_ISOC_SEGMENT)
+#define TRB_CTRL_RING_SIZE	(TRB_SIZE * 2)
+
+/* TRB bit mask */
+#define TRB_TYPE_BITMASK	GENMASK(15, 10)
+#define TRB_TYPE(p)		((p) << 10)
+#define TRB_FIELD_TO_TYPE(p)	(((p) & TRB_TYPE_BITMASK) >> 10)
+
+/* TRB type IDs */
+/* bulk, interrupt, isoc , and control data stage */
+#define TRB_NORMAL		1
+/* TRB for linking ring segments */
+#define TRB_LINK		6
+
+/* Cycle bit - indicates TRB ownership by driver or hw*/
+#define TRB_CYCLE		BIT(0)
+/*
+ * When set to '1', the device will toggle its interpretation of the Cycle bit
+ */
+#define TRB_TOGGLE		BIT(1)
+
+/*
+ * Short Packet (SP). OUT EPs at DMULT=1 only. Indicates if the TRB was
+ * processed while USB short packet was received. No more buffers defined by
+ * the TD will be used. DMA will automatically advance to next TD.
+ * - Shall be set to 0 by Software when putting TRB on the Transfer Ring
+ * - Shall be set to 1 by Controller when Short Packet condition for this TRB
+ *   is detected independent if ISP is set or not.
+ */
+#define TRB_SP			BIT(1)
+
+/* Interrupt on short packet*/
+#define TRB_ISP			BIT(2)
+/*Setting this bit enables FIFO DMA operation mode*/
+#define TRB_FIFO_MODE		BIT(3)
+/* Set PCIe no snoop attribute */
+#define TRB_CHAIN		BIT(4)
+/* Interrupt on completion */
+#define TRB_IOC			BIT(5)
+
+/* stream ID bitmasks. */
+#define TRB_STREAM_ID_BITMASK		GENMASK(31, 16)
+#define TRB_STREAM_ID(p)		((p) << 16)
+#define TRB_FIELD_TO_STREAMID(p)	(((p) & TRB_STREAM_ID_BITMASK) >> 16)
+
+/* Size of TD expressed in USB packets for HS/FS mode. */
+#define TRB_TDL_HS_SIZE(p)	(((p) << 16) & GENMASK(31, 16))
+#define TRB_TDL_HS_SIZE_GET(p)	(((p) & GENMASK(31, 16)) >> 16)
+
+/* transfer_len bitmasks. */
+#define TRB_LEN(p)		((p) & GENMASK(16, 0))
+
+/* Size of TD expressed in USB packets for SS mode. */
+#define TRB_TDL_SS_SIZE(p)	(((p) << 17) & GENMASK(23, 17))
+#define TRB_TDL_SS_SIZE_GET(p)	(((p) & GENMASK(23, 17)) >> 17)
+
+/* transfer_len bitmasks - bits 31:24 */
+#define TRB_BURST_LEN(p)	(((p) << 24) & GENMASK(31, 24))
+#define TRB_BURST_LEN_GET(p)	(((p) & GENMASK(31, 24)) >> 24)
+
+/* Data buffer pointer bitmasks*/
+#define TRB_BUFFER(p)		((p) & GENMASK(31, 0))
+
+/*-------------------------------------------------------------------------*/
+/* Driver numeric constants */
+
+/* Such declaration should be added to ch9.h */
+#define USB_DEVICE_MAX_ADDRESS		127
+
+/* Endpoint init values */
+#define CDNS3_EP_MAX_PACKET_LIMIT	1024
+#define CDNS3_EP_MAX_STREAMS		15
+#define CDNS3_EP0_MAX_PACKET_LIMIT	512
+
+/* All endpoints including EP0 */
+#define CDNS3_ENDPOINTS_MAX_COUNT	32
+#define CDNS3_EP_ZLP_BUF_SIZE		1024
+
+#define CDNS3_EP_BUF_SIZE		2	/* KB */
+#define CDNS3_EP_ISO_HS_MULT		3
+#define CDNS3_EP_ISO_SS_BURST		3
+#define CDNS3_MAX_NUM_DESCMISS_BUF	32
+#define CDNS3_DESCMIS_BUF_SIZE		2048	/* Bytes */
+#define CDNS3_WA2_NUM_BUFFERS		128
+/*-------------------------------------------------------------------------*/
+/* Used structs */
+
+struct cdns3_device;
+
+/**
+ * struct cdns3_endpoint - extended device side representation of USB endpoint.
+ * @endpoint: usb endpoint
+ * @pending_req_list: list of requests queuing on transfer ring.
+ * @deferred_req_list: list of requests waiting for queuing on transfer ring.
+ * @wa2_descmiss_req_list: list of requests internally allocated by driver.
+ * @trb_pool: transfer ring - array of transaction buffers
+ * @trb_pool_dma: dma address of transfer ring
+ * @cdns3_dev: device associated with this endpoint
+ * @name: a human readable name e.g. ep1out
+ * @flags: specify the current state of endpoint
+ * @descmis_req: internal transfer object used for getting data from on-chip
+ *     buffer. It can happen only if function driver doesn't send usb_request
+ *     object on time.
+ * @dir: endpoint direction
+ * @num: endpoint number (1 - 15)
+ * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
+ * @interval: interval between packets used for ISOC endpoint.
+ * @free_trbs: number of free TRBs in transfer ring
+ * @num_trbs: number of all TRBs in transfer ring
+ * @pcs: producer cycle state
+ * @ccs: consumer cycle state
+ * @enqueue: enqueue index in transfer ring
+ * @dequeue: dequeue index in transfer ring
+ * @trb_burst_size: number of burst used in trb.
+ */
+struct cdns3_endpoint {
+	struct usb_ep		endpoint;
+	struct list_head	pending_req_list;
+	struct list_head	deferred_req_list;
+	struct list_head	wa2_descmiss_req_list;
+	int			wa2_counter;
+
+	struct cdns3_trb	*trb_pool;
+	dma_addr_t		trb_pool_dma;
+
+	struct cdns3_device	*cdns3_dev;
+	char			name[20];
+
+#define EP_ENABLED		BIT(0)
+#define EP_STALLED		BIT(1)
+#define EP_STALL_PENDING	BIT(2)
+#define EP_WEDGE		BIT(3)
+#define EP_TRANSFER_STARTED	BIT(4)
+#define EP_UPDATE_EP_TRBADDR	BIT(5)
+#define EP_PENDING_REQUEST	BIT(6)
+#define EP_RING_FULL		BIT(7)
+#define EP_CLAIMED		BIT(8)
+#define EP_DEFERRED_DRDY	BIT(9)
+#define EP_QUIRK_ISO_OUT_EN	BIT(10)
+#define EP_QUIRK_END_TRANSFER	BIT(11)
+#define EP_QUIRK_EXTRA_BUF_DET	BIT(12)
+#define EP_QUIRK_EXTRA_BUF_EN	BIT(13)
+	u32			flags;
+
+	struct cdns3_request	*descmis_req;
+
+	u8			dir;
+	u8			num;
+	u8			type;
+	int			interval;
+
+	int			free_trbs;
+	int			num_trbs;
+	u8			pcs;
+	u8			ccs;
+	int			enqueue;
+	int			dequeue;
+	u8			trb_burst_size;
+
+	unsigned int		wa1_set:1;
+	struct cdns3_trb	*wa1_trb;
+	unsigned int		wa1_trb_index;
+	unsigned int		wa1_cycle_bit:1;
+};
+
+/**
+ * struct cdns3_aligned_buf - represent aligned buffer used for DMA transfer
+ * @buf: aligned to 8 bytes data buffer. Buffer address used in
+ *       TRB shall be aligned to 8.
+ * @dma: dma address
+ * @size: size of buffer
+ * @in_use: inform if this buffer is associated with usb_request
+ * @list: used to adding instance of this object to list
+ */
+struct cdns3_aligned_buf {
+	void			*buf;
+	dma_addr_t		dma;
+	u32			size;
+	int			in_use:1;
+	struct list_head	list;
+};
+
+/**
+ * struct cdns3_request - extended device side representation of usb_request
+ *                        object .
+ * @request: generic usb_request object describing single I/O request.
+ * @priv_ep: extended representation of usb_ep object
+ * @trb: the first TRB association with this request
+ * @start_trb: number of the first TRB in transfer ring
+ * @end_trb: number of the last TRB in transfer ring
+ * @aligned_buf: object holds information about aligned buffer associated whit
+ *               this endpoint
+ * @flags: flag specifying special usage of request
+ * @list: used by internally allocated request to add to wa2_descmiss_req_list.
+ */
+struct cdns3_request {
+	struct usb_request		request;
+	struct cdns3_endpoint		*priv_ep;
+	struct cdns3_trb		*trb;
+	int				start_trb;
+	int				end_trb;
+	struct cdns3_aligned_buf	*aligned_buf;
+#define REQUEST_PENDING			BIT(0)
+#define REQUEST_INTERNAL		BIT(1)
+#define REQUEST_INTERNAL_CH		BIT(2)
+#define REQUEST_ZLP			BIT(3)
+#define REQUEST_UNALIGNED		BIT(4)
+	u32				flags;
+	struct list_head		list;
+};
+
+#define to_cdns3_request(r) (container_of(r, struct cdns3_request, request))
+
+/*Stages used during enumeration process.*/
+#define CDNS3_SETUP_STAGE		0x0
+#define CDNS3_DATA_STAGE		0x1
+#define CDNS3_STATUS_STAGE		0x2
+
+/**
+ * struct cdns3_device - represent USB device.
+ * @dev: pointer to device structure associated whit this controller
+ * @sysdev: pointer to the DMA capable device
+ * @gadget: device side representation of the peripheral controller
+ * @gadget_driver: pointer to the gadget driver
+ * @dev_ver: device controller version.
+ * @lock: for synchronizing
+ * @regs: base address for device side registers
+ * @setup_buf: used while processing usb control requests
+ * @setup_dma: dma address for setup_buf
+ * @zlp_buf - zlp buffer
+ * @ep0_stage: ep0 stage during enumeration process.
+ * @ep0_data_dir: direction for control transfer
+ * @eps: array of pointers to all endpoints with exclusion ep0
+ * @aligned_buf_list: list of aligned buffers internally allocated by driver
+ * @aligned_buf_wq: workqueue freeing  no longer used aligned buf.
+ * @selected_ep: actually selected endpoint. It's used only to improve
+ *               performance.
+ * @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP.
+ * @u1_allowed: allow device transition to u1 state
+ * @u2_allowed: allow device transition to u2 state
+ * @is_selfpowered: device is self powered
+ * @setup_pending: setup packet is processing by gadget driver
+ * @hw_configured_flag: hardware endpoint configuration was set.
+ * @wake_up_flag: allow device to remote up the host
+ * @status_completion_no_call: indicate that driver is waiting for status s
+ *     stage completion. It's used in deferred SET_CONFIGURATION request.
+ * @onchip_buffers: number of available on-chip buffers.
+ * @onchip_used_size: actual size of on-chip memory assigned to endpoints.
+ * @pending_status_wq: workqueue handling status stage for deferred requests.
+ * @pending_status_request: request for which status stage was deferred
+ */
+struct cdns3_device {
+	struct device			*dev;
+	struct device			*sysdev;
+
+	struct usb_gadget		gadget;
+	struct usb_gadget_driver	*gadget_driver;
+
+#define CDNS_REVISION_V0		0x00024501
+#define CDNS_REVISION_V1		0x00024509
+	u32				dev_ver;
+
+	/* generic spin-lock for drivers */
+	spinlock_t			lock;
+
+	struct cdns3_usb_regs		__iomem *regs;
+
+	struct usb_ctrlrequest		*setup_buf;
+	dma_addr_t			setup_dma;
+	void				*zlp_buf;
+
+	u8				ep0_stage;
+	int				ep0_data_dir;
+
+	struct cdns3_endpoint		*eps[CDNS3_ENDPOINTS_MAX_COUNT];
+
+	struct list_head		aligned_buf_list;
+	struct work_struct		aligned_buf_wq;
+
+	u32				selected_ep;
+	u16				isoch_delay;
+
+	unsigned			wait_for_setup:1;
+	unsigned			u1_allowed:1;
+	unsigned			u2_allowed:1;
+	unsigned			is_selfpowered:1;
+	unsigned			setup_pending:1;
+	int				hw_configured_flag:1;
+	int				wake_up_flag:1;
+	unsigned			status_completion_no_call:1;
+	int				out_mem_is_allocated;
+
+	struct work_struct		pending_status_wq;
+	struct usb_request		*pending_status_request;
+
+	/*in KB */
+	u16				onchip_buffers;
+	u16				onchip_used_size;
+};
+
+void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
+dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
+				 struct cdns3_trb *trb);
+enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev);
+void cdns3_pending_setup_status_handler(struct work_struct *work);
+void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev);
+void cdns3_set_hw_configuration(struct cdns3_device *priv_dev);
+void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep);
+void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable);
+struct usb_request *cdns3_next_request(struct list_head *list);
+int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
+			  struct usb_request *request);
+void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm);
+int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep);
+u8 cdns3_ep_addr_to_index(u8 ep_addr);
+int cdns3_gadget_ep_set_wedge(struct usb_ep *ep);
+int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value);
+void __cdns3_gadget_ep_set_halt(struct cdns3_endpoint *priv_ep);
+int __cdns3_gadget_ep_clear_halt(struct cdns3_endpoint *priv_ep);
+struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
+						  gfp_t gfp_flags);
+void cdns3_gadget_ep_free_request(struct usb_ep *ep,
+				  struct usb_request *request);
+int cdns3_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request);
+void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
+			   struct cdns3_request *priv_req,
+			   int status);
+
+int cdns3_init_ep0(struct cdns3_device *priv_dev,
+		   struct cdns3_endpoint *priv_ep);
+void cdns3_ep0_config(struct cdns3_device *priv_dev);
+void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
+void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
+int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev);
+
+#endif /* __LINUX_CDNS3_GADGET */
diff --git a/drivers/usb/cdns3/host-export.h b/drivers/usb/cdns3/host-export.h
new file mode 100644
index 000000000000..b498a170b7e8
--- /dev/null
+++ b/drivers/usb/cdns3/host-export.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence USBSS DRD Driver - Host Export APIs
+ *
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Peter Chen <peter.chen@nxp.com>
+ */
+#ifndef __LINUX_CDNS3_HOST_EXPORT
+#define __LINUX_CDNS3_HOST_EXPORT
+
+#ifdef CONFIG_USB_CDNS3_HOST
+
+int cdns3_host_init(struct cdns3 *cdns);
+void cdns3_host_exit(struct cdns3 *cdns);
+
+#else
+
+static inline int cdns3_host_init(struct cdns3 *cdns)
+{
+	return -ENXIO;
+}
+
+static inline void cdns3_host_exit(struct cdns3 *cdns) { }
+
+#endif /* CONFIG_USB_CDNS3_HOST */
+
+#endif /* __LINUX_CDNS3_HOST_EXPORT */
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
new file mode 100644
index 000000000000..2733a8f71fcd
--- /dev/null
+++ b/drivers/usb/cdns3/host.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS DRD Driver - host side
+ *
+ * Copyright (C) 2018-2019 Cadence Design Systems.
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Peter Chen <peter.chen@nxp.com>
+ *          Pawel Laszczak <pawell@cadence.com>
+ */
+
+#include <linux/platform_device.h>
+#include "core.h"
+#include "drd.h"
+
+static int __cdns3_host_init(struct cdns3 *cdns)
+{
+	struct platform_device *xhci;
+	int ret;
+
+	cdns3_drd_switch_host(cdns, 1);
+
+	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+	if (!xhci) {
+		dev_err(cdns->dev, "couldn't allocate xHCI device\n");
+		return -ENOMEM;
+	}
+
+	xhci->dev.parent = cdns->dev;
+	cdns->host_dev = xhci;
+
+	ret = platform_device_add_resources(xhci, cdns->xhci_res,
+					    CDNS3_XHCI_RESOURCES_NUM);
+	if (ret) {
+		dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
+		goto err1;
+	}
+
+	ret = platform_device_add(xhci);
+	if (ret) {
+		dev_err(cdns->dev, "failed to register xHCI device\n");
+		goto err1;
+	}
+
+	return 0;
+err1:
+	platform_device_put(xhci);
+	return ret;
+}
+
+static void cdns3_host_exit(struct cdns3 *cdns)
+{
+	platform_device_unregister(cdns->host_dev);
+	cdns->host_dev = NULL;
+	cdns3_drd_switch_host(cdns, 0);
+}
+
+int cdns3_host_init(struct cdns3 *cdns)
+{
+	struct cdns3_role_driver *rdrv;
+
+	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
+	if (!rdrv)
+		return -ENOMEM;
+
+	rdrv->start	= __cdns3_host_init;
+	rdrv->stop	= cdns3_host_exit;
+	rdrv->state	= CDNS3_ROLE_STATE_INACTIVE;
+	rdrv->name	= "host";
+
+	cdns->roles[USB_ROLE_HOST] = rdrv;
+
+	return 0;
+}
diff --git a/drivers/usb/cdns3/trace.c b/drivers/usb/cdns3/trace.c
new file mode 100644
index 000000000000..459fa72d9c74
--- /dev/null
+++ b/drivers/usb/cdns3/trace.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USBSS device controller driver Trace Support
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#define CREATE_TRACE_POINTS
+#include "trace.h"
diff --git a/drivers/usb/cdns3/trace.h b/drivers/usb/cdns3/trace.h
new file mode 100644
index 000000000000..e92348c9b4d7
--- /dev/null
+++ b/drivers/usb/cdns3/trace.h
@@ -0,0 +1,493 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * USBSS device controller driver.
+ * Trace support header file.
+ *
+ * Copyright (C) 2018-2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cdns3
+
+#if !defined(__LINUX_CDNS3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
+#define __LINUX_CDNS3_TRACE
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+#include <asm/byteorder.h>
+#include <linux/usb/ch9.h>
+#include "core.h"
+#include "gadget.h"
+#include "debug.h"
+
+#define CDNS3_MSG_MAX	500
+
+TRACE_EVENT(cdns3_halt,
+	TP_PROTO(struct cdns3_endpoint *ep_priv, u8 halt, u8 flush),
+	TP_ARGS(ep_priv, halt, flush),
+	TP_STRUCT__entry(
+		__string(name, ep_priv->name)
+		__field(u8, halt)
+		__field(u8, flush)
+	),
+	TP_fast_assign(
+		__assign_str(name, ep_priv->name);
+		__entry->halt = halt;
+		__entry->flush = flush;
+	),
+	TP_printk("Halt %s for %s: %s", __entry->flush ? " and flush" : "",
+		  __get_str(name), __entry->halt ? "set" : "cleared")
+);
+
+TRACE_EVENT(cdns3_wa1,
+	TP_PROTO(struct cdns3_endpoint *ep_priv, char *msg),
+	TP_ARGS(ep_priv, msg),
+	TP_STRUCT__entry(
+		__string(ep_name, ep_priv->name)
+		__string(msg, msg)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name, ep_priv->name);
+		__assign_str(msg, msg);
+	),
+	TP_printk("WA1: %s %s", __get_str(ep_name), __get_str(msg))
+);
+
+TRACE_EVENT(cdns3_wa2,
+	TP_PROTO(struct cdns3_endpoint *ep_priv, char *msg),
+	TP_ARGS(ep_priv, msg),
+	TP_STRUCT__entry(
+		__string(ep_name, ep_priv->name)
+		__string(msg, msg)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name, ep_priv->name);
+		__assign_str(msg, msg);
+	),
+	TP_printk("WA2: %s %s", __get_str(ep_name), __get_str(msg))
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_doorbell,
+	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
+	TP_ARGS(ep_name, ep_trbaddr),
+	TP_STRUCT__entry(
+		__string(name, ep_name)
+		__field(u32, ep_trbaddr)
+	),
+	TP_fast_assign(
+		__assign_str(name, ep_name);
+		__entry->ep_trbaddr = ep_trbaddr;
+	),
+	TP_printk("%s, ep_trbaddr %08x", __get_str(name),
+		  __entry->ep_trbaddr)
+);
+
+DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_ep0,
+	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
+	TP_ARGS(ep_name, ep_trbaddr)
+);
+
+DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_epx,
+	TP_PROTO(const char *ep_name, u32 ep_trbaddr),
+	TP_ARGS(ep_name, ep_trbaddr)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_usb_irq,
+	TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
+	TP_ARGS(priv_dev, usb_ists),
+	TP_STRUCT__entry(
+		__field(enum usb_device_speed, speed)
+		__field(u32, usb_ists)
+		__dynamic_array(char, str, CDNS3_MSG_MAX)
+	),
+	TP_fast_assign(
+		__entry->speed = cdns3_get_speed(priv_dev);
+		__entry->usb_ists = usb_ists;
+	),
+	TP_printk("%s", cdns3_decode_usb_irq(__get_str(str), __entry->speed,
+					     __entry->usb_ists))
+);
+
+DEFINE_EVENT(cdns3_log_usb_irq, cdns3_usb_irq,
+	TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists),
+	TP_ARGS(priv_dev, usb_ists)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_epx_irq,
+	TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_dev, priv_ep),
+	TP_STRUCT__entry(
+		__string(ep_name, priv_ep->name)
+		__field(u32, ep_sts)
+		__field(u32, ep_traddr)
+		__dynamic_array(char, str, CDNS3_MSG_MAX)
+	),
+	TP_fast_assign(
+		__assign_str(ep_name, priv_ep->name);
+		__entry->ep_sts = readl(&priv_dev->regs->ep_sts);
+		__entry->ep_traddr = readl(&priv_dev->regs->ep_traddr);
+	),
+	TP_printk("%s, ep_traddr: %08x",
+		  cdns3_decode_epx_irq(__get_str(str),
+				       __get_str(ep_name),
+				       __entry->ep_sts),
+		  __entry->ep_traddr)
+);
+
+DEFINE_EVENT(cdns3_log_epx_irq, cdns3_epx_irq,
+	TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_dev, priv_ep)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_ep0_irq,
+	TP_PROTO(struct cdns3_device *priv_dev,  u32 ep_sts),
+	TP_ARGS(priv_dev, ep_sts),
+	TP_STRUCT__entry(
+		__field(int, ep_dir)
+		__field(u32, ep_sts)
+		__dynamic_array(char, str, CDNS3_MSG_MAX)
+	),
+	TP_fast_assign(
+		__entry->ep_dir = priv_dev->ep0_data_dir;
+		__entry->ep_sts = ep_sts;
+	),
+	TP_printk("%s", cdns3_decode_ep0_irq(__get_str(str),
+					     __entry->ep_dir,
+					     __entry->ep_sts))
+);
+
+DEFINE_EVENT(cdns3_log_ep0_irq, cdns3_ep0_irq,
+	TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts),
+	TP_ARGS(priv_dev, ep_sts)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_ctrl,
+	TP_PROTO(struct usb_ctrlrequest *ctrl),
+	TP_ARGS(ctrl),
+	TP_STRUCT__entry(
+		__field(u8, bRequestType)
+		__field(u8, bRequest)
+		__field(u16, wValue)
+		__field(u16, wIndex)
+		__field(u16, wLength)
+		__dynamic_array(char, str, CDNS3_MSG_MAX)
+	),
+	TP_fast_assign(
+		__entry->bRequestType = ctrl->bRequestType;
+		__entry->bRequest = ctrl->bRequest;
+		__entry->wValue = le16_to_cpu(ctrl->wValue);
+		__entry->wIndex = le16_to_cpu(ctrl->wIndex);
+		__entry->wLength = le16_to_cpu(ctrl->wLength);
+	),
+	TP_printk("%s", usb_decode_ctrl(__get_str(str), CDNS3_MSG_MAX,
+					__entry->bRequestType,
+					__entry->bRequest, __entry->wValue,
+					__entry->wIndex, __entry->wLength)
+	)
+);
+
+DEFINE_EVENT(cdns3_log_ctrl, cdns3_ctrl_req,
+	TP_PROTO(struct usb_ctrlrequest *ctrl),
+	TP_ARGS(ctrl)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_request,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req),
+	TP_STRUCT__entry(
+		__string(name, req->priv_ep->name)
+		__field(struct cdns3_request *, req)
+		__field(void *, buf)
+		__field(unsigned int, actual)
+		__field(unsigned int, length)
+		__field(int, status)
+		__field(int, zero)
+		__field(int, short_not_ok)
+		__field(int, no_interrupt)
+		__field(int, start_trb)
+		__field(int, end_trb)
+		__field(struct cdns3_trb *, start_trb_addr)
+		__field(int, flags)
+	),
+	TP_fast_assign(
+		__assign_str(name, req->priv_ep->name);
+		__entry->req = req;
+		__entry->buf = req->request.buf;
+		__entry->actual = req->request.actual;
+		__entry->length = req->request.length;
+		__entry->status = req->request.status;
+		__entry->zero = req->request.zero;
+		__entry->short_not_ok = req->request.short_not_ok;
+		__entry->no_interrupt = req->request.no_interrupt;
+		__entry->start_trb = req->start_trb;
+		__entry->end_trb = req->end_trb;
+		__entry->start_trb_addr = req->trb;
+		__entry->flags = req->flags;
+	),
+	TP_printk("%s: req: %p, req buff %p, length: %u/%u %s%s%s, status: %d,"
+		  " trb: [start:%d, end:%d: virt addr %pa], flags:%x ",
+		__get_str(name), __entry->req, __entry->buf, __entry->actual,
+		__entry->length,
+		__entry->zero ? "Z" : "z",
+		__entry->short_not_ok ? "S" : "s",
+		__entry->no_interrupt ? "I" : "i",
+		__entry->status,
+		__entry->start_trb,
+		__entry->end_trb,
+		__entry->start_trb_addr,
+		__entry->flags
+	)
+);
+
+DEFINE_EVENT(cdns3_log_request, cdns3_alloc_request,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(cdns3_log_request, cdns3_free_request,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(cdns3_log_request, cdns3_ep_queue,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(cdns3_log_request, cdns3_ep_dequeue,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(cdns3_log_request, cdns3_gadget_giveback,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+TRACE_EVENT(cdns3_ep0_queue,
+	TP_PROTO(struct cdns3_device *dev_priv, struct usb_request *request),
+	TP_ARGS(dev_priv, request),
+	TP_STRUCT__entry(
+		__field(int, dir)
+		__field(int, length)
+	),
+	TP_fast_assign(
+		__entry->dir = dev_priv->ep0_data_dir;
+		__entry->length = request->length;
+	),
+	TP_printk("Queue to ep0%s length: %u", __entry->dir ? "in" : "out",
+		  __entry->length)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_aligned_request,
+	TP_PROTO(struct cdns3_request *priv_req),
+	TP_ARGS(priv_req),
+	TP_STRUCT__entry(
+		__string(name, priv_req->priv_ep->name)
+		__field(struct usb_request *, req)
+		__field(void *, buf)
+		__field(dma_addr_t, dma)
+		__field(void *, aligned_buf)
+		__field(dma_addr_t, aligned_dma)
+		__field(u32, aligned_buf_size)
+	),
+	TP_fast_assign(
+		__assign_str(name, priv_req->priv_ep->name);
+		__entry->req = &priv_req->request;
+		__entry->buf = priv_req->request.buf;
+		__entry->dma = priv_req->request.dma;
+		__entry->aligned_buf = priv_req->aligned_buf->buf;
+		__entry->aligned_dma = priv_req->aligned_buf->dma;
+		__entry->aligned_buf_size = priv_req->aligned_buf->size;
+	),
+	TP_printk("%s: req: %p, req buf %p, dma %pad a_buf %p a_dma %pad, size %d",
+		__get_str(name), __entry->req, __entry->buf, &__entry->dma,
+		__entry->aligned_buf, &__entry->aligned_dma,
+		__entry->aligned_buf_size
+	)
+);
+
+DEFINE_EVENT(cdns3_log_aligned_request, cdns3_free_aligned_request,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DEFINE_EVENT(cdns3_log_aligned_request, cdns3_prepare_aligned_request,
+	TP_PROTO(struct cdns3_request *req),
+	TP_ARGS(req)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_trb,
+	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
+	TP_ARGS(priv_ep, trb),
+	TP_STRUCT__entry(
+		__string(name, priv_ep->name)
+		__field(struct cdns3_trb *, trb)
+		__field(u32, buffer)
+		__field(u32, length)
+		__field(u32, control)
+		__field(u32, type)
+	),
+	TP_fast_assign(
+		__assign_str(name, priv_ep->name);
+		__entry->trb = trb;
+		__entry->buffer = trb->buffer;
+		__entry->length = trb->length;
+		__entry->control = trb->control;
+		__entry->type = usb_endpoint_type(priv_ep->endpoint.desc);
+	),
+	TP_printk("%s: trb %p, dma buf: 0x%08x, size: %ld, burst: %d ctrl: 0x%08x (%s%s%s%s%s%s%s)",
+		__get_str(name), __entry->trb, __entry->buffer,
+		TRB_LEN(__entry->length),
+		(u8)TRB_BURST_LEN_GET(__entry->length),
+		__entry->control,
+		__entry->control & TRB_CYCLE ? "C=1, " : "C=0, ",
+		__entry->control & TRB_TOGGLE ? "T=1, " : "T=0, ",
+		__entry->control & TRB_ISP ? "ISP, " : "",
+		__entry->control & TRB_FIFO_MODE ? "FIFO, " : "",
+		__entry->control & TRB_CHAIN ? "CHAIN, " : "",
+		__entry->control & TRB_IOC ? "IOC, " : "",
+		TRB_FIELD_TO_TYPE(__entry->control) == TRB_NORMAL ? "Normal" : "LINK"
+	)
+);
+
+DEFINE_EVENT(cdns3_log_trb, cdns3_prepare_trb,
+	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
+	TP_ARGS(priv_ep, trb)
+);
+
+DEFINE_EVENT(cdns3_log_trb, cdns3_complete_trb,
+	TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb),
+	TP_ARGS(priv_ep, trb)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_ring,
+	TP_PROTO(struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_ep),
+	TP_STRUCT__entry(
+		__dynamic_array(u8, ring, TRB_RING_SIZE)
+		__dynamic_array(u8, priv_ep, sizeof(struct cdns3_endpoint))
+		__dynamic_array(char, buffer,
+				(TRBS_PER_SEGMENT * 65) + CDNS3_MSG_MAX)
+	),
+	TP_fast_assign(
+		memcpy(__get_dynamic_array(priv_ep), priv_ep,
+		       sizeof(struct cdns3_endpoint));
+		memcpy(__get_dynamic_array(ring), priv_ep->trb_pool,
+		       TRB_RING_SIZE);
+	),
+
+	TP_printk("%s",
+		  cdns3_dbg_ring((struct cdns3_endpoint *)__get_str(priv_ep),
+				 (struct cdns3_trb *)__get_str(ring),
+				 __get_str(buffer)))
+);
+
+DEFINE_EVENT(cdns3_log_ring, cdns3_ring,
+	TP_PROTO(struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_ep)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_ep,
+	TP_PROTO(struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_ep),
+	TP_STRUCT__entry(
+		__string(name, priv_ep->name)
+		__field(unsigned int, maxpacket)
+		__field(unsigned int, maxpacket_limit)
+		__field(unsigned int, max_streams)
+		__field(unsigned int, maxburst)
+		__field(unsigned int, flags)
+		__field(unsigned int, dir)
+		__field(u8, enqueue)
+		__field(u8, dequeue)
+	),
+	TP_fast_assign(
+		__assign_str(name, priv_ep->name);
+		__entry->maxpacket = priv_ep->endpoint.maxpacket;
+		__entry->maxpacket_limit = priv_ep->endpoint.maxpacket_limit;
+		__entry->max_streams = priv_ep->endpoint.max_streams;
+		__entry->maxburst = priv_ep->endpoint.maxburst;
+		__entry->flags = priv_ep->flags;
+		__entry->dir = priv_ep->dir;
+		__entry->enqueue = priv_ep->enqueue;
+		__entry->dequeue = priv_ep->dequeue;
+	),
+	TP_printk("%s: mps: %d/%d. streams: %d, burst: %d, enq idx: %d, "
+		  "deq idx: %d, flags %s%s%s%s%s%s%s%s, dir: %s",
+		__get_str(name), __entry->maxpacket,
+		__entry->maxpacket_limit, __entry->max_streams,
+		__entry->maxburst, __entry->enqueue,
+		__entry->dequeue,
+		__entry->flags & EP_ENABLED ? "EN | " : "",
+		__entry->flags & EP_STALLED ? "STALLED | " : "",
+		__entry->flags & EP_WEDGE ? "WEDGE | " : "",
+		__entry->flags & EP_TRANSFER_STARTED ? "STARTED | " : "",
+		__entry->flags & EP_UPDATE_EP_TRBADDR ? "UPD TRB | " : "",
+		__entry->flags & EP_PENDING_REQUEST ? "REQ PEN | " : "",
+		__entry->flags & EP_RING_FULL ? "RING FULL |" : "",
+		__entry->flags & EP_CLAIMED ?  "CLAIMED " : "",
+		__entry->dir ? "IN" : "OUT"
+	)
+);
+
+DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_enable,
+	TP_PROTO(struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_ep)
+);
+
+DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_disable,
+	TP_PROTO(struct cdns3_endpoint *priv_ep),
+	TP_ARGS(priv_ep)
+);
+
+DECLARE_EVENT_CLASS(cdns3_log_request_handled,
+	TP_PROTO(struct cdns3_request *priv_req, int current_index,
+		 int handled),
+	TP_ARGS(priv_req, current_index, handled),
+	TP_STRUCT__entry(
+		__field(struct cdns3_request *, priv_req)
+		__field(unsigned int, dma_position)
+		__field(unsigned int, handled)
+		__field(unsigned int, dequeue_idx)
+		__field(unsigned int, enqueue_idx)
+		__field(unsigned int, start_trb)
+		__field(unsigned int, end_trb)
+	),
+	TP_fast_assign(
+		__entry->priv_req = priv_req;
+		__entry->dma_position = current_index;
+		__entry->handled = handled;
+		__entry->dequeue_idx = priv_req->priv_ep->dequeue;
+		__entry->enqueue_idx = priv_req->priv_ep->enqueue;
+		__entry->start_trb = priv_req->start_trb;
+		__entry->end_trb = priv_req->end_trb;
+	),
+	TP_printk("Req: %p %s, DMA pos: %d, ep deq: %d, ep enq: %d,"
+		  " start trb: %d, end trb: %d",
+		__entry->priv_req,
+		__entry->handled ? "handled" : "not handled",
+		__entry->dma_position, __entry->dequeue_idx,
+		__entry->enqueue_idx, __entry->start_trb,
+		__entry->end_trb
+	)
+);
+
+DEFINE_EVENT(cdns3_log_request_handled, cdns3_request_handled,
+	TP_PROTO(struct cdns3_request *priv_req, int current_index,
+		 int handled),
+	TP_ARGS(priv_req, current_index, handled)
+);
+#endif /* __LINUX_CDNS3_TRACE */
+
+/* this part must be outside header guard */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+#include <trace/define_trace.h>
diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
index eb37ebfcb123..ae850b3fddf2 100644
--- a/drivers/usb/chipidea/Kconfig
+++ b/drivers/usb/chipidea/Kconfig
@@ -6,6 +6,7 @@ config USB_CHIPIDEA
 	select EXTCON
 	select RESET_CONTROLLER
 	select USB_ULPI_BUS
+	select USB_ROLE_SWITCH
 	help
 	  Say Y here if your system has a dual role high speed USB
 	  controller based on ChipIdea silicon IP. It supports:
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 6a2cc5cd0281..6911aef500e9 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -16,6 +16,7 @@
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg-fsm.h>
 #include <linux/usb/otg.h>
+#include <linux/usb/role.h>
 #include <linux/ulpi/interface.h>
 
 /******************************************************************************
@@ -217,6 +218,7 @@ struct ci_hdrc {
 	ktime_t				hr_timeouts[NUM_OTG_FSM_TIMERS];
 	unsigned			enabled_otg_timer_bits;
 	enum otg_fsm_timer		next_otg_timer;
+	struct usb_role_switch		*role_switch;
 	struct work_struct		work;
 	struct workqueue_struct		*wq;
 
@@ -290,6 +292,16 @@ static inline void ci_role_stop(struct ci_hdrc *ci)
 	ci->roles[role]->stop(ci);
 }
 
+static inline enum usb_role ci_role_to_usb_role(struct ci_hdrc *ci)
+{
+	if (ci->role == CI_ROLE_HOST)
+		return USB_ROLE_HOST;
+	else if (ci->role == CI_ROLE_GADGET && ci->vbus_active)
+		return USB_ROLE_DEVICE;
+	else
+		return USB_ROLE_NONE;
+}
+
 /**
  * hw_read_id_reg: reads from a identification register
  * @ci: the controller
diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index bb4645a8ca46..af648ba6544d 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -216,13 +216,13 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
 	ci->rcdev.ops = &ci_hdrc_msm_reset_ops;
 	ci->rcdev.of_node = pdev->dev.of_node;
 	ci->rcdev.nr_resets = 2;
-	ret = reset_controller_register(&ci->rcdev);
+	ret = devm_reset_controller_register(&pdev->dev, &ci->rcdev);
 	if (ret)
 		return ret;
 
 	ret = clk_prepare_enable(ci->fs_clk);
 	if (ret)
-		goto err_fs;
+		return ret;
 
 	reset_control_assert(reset);
 	usleep_range(10000, 12000);
@@ -232,7 +232,7 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
 
 	ret = clk_prepare_enable(ci->core_clk);
 	if (ret)
-		goto err_fs;
+		return ret;
 
 	ret = clk_prepare_enable(ci->iface_clk);
 	if (ret)
@@ -271,8 +271,6 @@ err_mux:
 	clk_disable_unprepare(ci->iface_clk);
 err_iface:
 	clk_disable_unprepare(ci->core_clk);
-err_fs:
-	reset_controller_unregister(&ci->rcdev);
 	return ret;
 }
 
@@ -284,7 +282,6 @@ static int ci_hdrc_msm_remove(struct platform_device *pdev)
 	ci_hdrc_remove_device(ci->ci);
 	clk_disable_unprepare(ci->iface_clk);
 	clk_disable_unprepare(ci->core_clk);
-	reset_controller_unregister(&ci->rcdev);
 
 	return 0;
 }
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 26062d610c20..98ee575ee500 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -600,6 +600,71 @@ static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
 	return NOTIFY_DONE;
 }
 
+static enum usb_role ci_usb_role_switch_get(struct device *dev)
+{
+	struct ci_hdrc *ci = dev_get_drvdata(dev);
+	enum usb_role role;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ci->lock, flags);
+	role = ci_role_to_usb_role(ci);
+	spin_unlock_irqrestore(&ci->lock, flags);
+
+	return role;
+}
+
+static int ci_usb_role_switch_set(struct device *dev, enum usb_role role)
+{
+	struct ci_hdrc *ci = dev_get_drvdata(dev);
+	struct ci_hdrc_cable *cable = NULL;
+	enum usb_role current_role = ci_role_to_usb_role(ci);
+	unsigned long flags;
+
+	if (current_role == role)
+		return 0;
+
+	pm_runtime_get_sync(ci->dev);
+	/* Stop current role */
+	spin_lock_irqsave(&ci->lock, flags);
+	if (current_role == USB_ROLE_DEVICE)
+		cable = &ci->platdata->vbus_extcon;
+	else if (current_role == USB_ROLE_HOST)
+		cable = &ci->platdata->id_extcon;
+
+	if (cable) {
+		cable->changed = true;
+		cable->connected = false;
+		ci_irq(ci->irq, ci);
+		spin_unlock_irqrestore(&ci->lock, flags);
+		if (ci->wq && role != USB_ROLE_NONE)
+			flush_workqueue(ci->wq);
+		spin_lock_irqsave(&ci->lock, flags);
+	}
+
+	cable = NULL;
+
+	/* Start target role */
+	if (role == USB_ROLE_DEVICE)
+		cable = &ci->platdata->vbus_extcon;
+	else if (role == USB_ROLE_HOST)
+		cable = &ci->platdata->id_extcon;
+
+	if (cable) {
+		cable->changed = true;
+		cable->connected = true;
+		ci_irq(ci->irq, ci);
+	}
+	spin_unlock_irqrestore(&ci->lock, flags);
+	pm_runtime_put_sync(ci->dev);
+
+	return 0;
+}
+
+static struct usb_role_switch_desc ci_role_switch = {
+	.set = ci_usb_role_switch_set,
+	.get = ci_usb_role_switch_get,
+};
+
 static int ci_get_platdata(struct device *dev,
 		struct ci_hdrc_platform_data *platdata)
 {
@@ -726,6 +791,9 @@ static int ci_get_platdata(struct device *dev,
 			cable->connected = false;
 	}
 
+	if (device_property_read_bool(dev, "usb-role-switch"))
+		ci_role_switch.fwnode = dev->fwnode;
+
 	platdata->pctl = devm_pinctrl_get(dev);
 	if (!IS_ERR(platdata->pctl)) {
 		struct pinctrl_state *p;
@@ -903,10 +971,7 @@ static struct attribute *ci_attrs[] = {
 	&dev_attr_role.attr,
 	NULL,
 };
-
-static const struct attribute_group ci_attr_group = {
-	.attrs = ci_attrs,
-};
+ATTRIBUTE_GROUPS(ci);
 
 static int ci_hdrc_probe(struct platform_device *pdev)
 {
@@ -1008,7 +1073,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 
 	ci->irq = platform_get_irq(pdev, 0);
 	if (ci->irq < 0) {
-		dev_err(dev, "missing IRQ\n");
 		ret = ci->irq;
 		goto deinit_phy;
 	}
@@ -1051,6 +1115,15 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		}
 	}
 
+	if (ci_role_switch.fwnode) {
+		ci->role_switch = usb_role_switch_register(dev,
+					&ci_role_switch);
+		if (IS_ERR(ci->role_switch)) {
+			ret = PTR_ERR(ci->role_switch);
+			goto deinit_otg;
+		}
+	}
+
 	if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
 		if (ci->is_otg) {
 			ci->role = ci_otg_role(ci);
@@ -1106,15 +1179,12 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 	device_set_wakeup_capable(&pdev->dev, true);
 	dbg_create_files(ci);
 
-	ret = sysfs_create_group(&dev->kobj, &ci_attr_group);
-	if (ret)
-		goto remove_debug;
-
 	return 0;
 
-remove_debug:
-	dbg_remove_files(ci);
 stop:
+	if (ci->role_switch)
+		usb_role_switch_unregister(ci->role_switch);
+deinit_otg:
 	if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
 		ci_hdrc_otg_destroy(ci);
 deinit_gadget:
@@ -1133,6 +1203,9 @@ static int ci_hdrc_remove(struct platform_device *pdev)
 {
 	struct ci_hdrc *ci = platform_get_drvdata(pdev);
 
+	if (ci->role_switch)
+		usb_role_switch_unregister(ci->role_switch);
+
 	if (ci->supports_runtime_pm) {
 		pm_runtime_get_sync(&pdev->dev);
 		pm_runtime_disable(&pdev->dev);
@@ -1140,7 +1213,6 @@ static int ci_hdrc_remove(struct platform_device *pdev)
 	}
 
 	dbg_remove_files(ci);
-	sysfs_remove_group(&ci->dev->kobj, &ci_attr_group);
 	ci_role_destroy(ci);
 	ci_hdrc_enter_lpm(ci, true);
 	ci_usb_phy_exit(ci);
@@ -1319,6 +1391,7 @@ static struct platform_driver ci_hdrc_driver = {
 	.driver	= {
 		.name	= "ci_hdrc",
 		.pm	= &ci_pm_ops,
+		.dev_groups = ci_groups,
 	},
 };
 
diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
index f25d4827fd49..fbfb02e05c97 100644
--- a/drivers/usb/chipidea/otg.c
+++ b/drivers/usb/chipidea/otg.c
@@ -35,7 +35,7 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
 	 * detection overwrite OTGSC register value
 	 */
 	cable = &ci->platdata->vbus_extcon;
-	if (!IS_ERR(cable->edev)) {
+	if (!IS_ERR(cable->edev) || ci->role_switch) {
 		if (cable->changed)
 			val |= OTGSC_BSVIS;
 		else
@@ -53,7 +53,7 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
 	}
 
 	cable = &ci->platdata->id_extcon;
-	if (!IS_ERR(cable->edev)) {
+	if (!IS_ERR(cable->edev) || ci->role_switch) {
 		if (cable->changed)
 			val |= OTGSC_IDIS;
 		else
@@ -83,7 +83,7 @@ void hw_write_otgsc(struct ci_hdrc *ci, u32 mask, u32 data)
 	struct ci_hdrc_cable *cable;
 
 	cable = &ci->platdata->vbus_extcon;
-	if (!IS_ERR(cable->edev)) {
+	if (!IS_ERR(cable->edev) || ci->role_switch) {
 		if (data & mask & OTGSC_BSVIS)
 			cable->changed = false;
 
@@ -97,7 +97,7 @@ void hw_write_otgsc(struct ci_hdrc *ci, u32 mask, u32 data)
 	}
 
 	cable = &ci->platdata->id_extcon;
-	if (!IS_ERR(cable->edev)) {
+	if (!IS_ERR(cable->edev) || ci->role_switch) {
 		if (data & mask & OTGSC_IDIS)
 			cable->changed = false;
 
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 67ad40b0a05b..8f18e7b6cadf 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1762,12 +1762,11 @@ static int ci_udc_start(struct usb_gadget *gadget,
 			 struct usb_gadget_driver *driver)
 {
 	struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
-	int retval = -ENOMEM;
+	int retval;
 
 	if (driver->disconnect == NULL)
 		return -EINVAL;
 
-
 	ci->ep0out->ep.desc = &ctrl_endpt_out_desc;
 	retval = usb_ep_enable(&ci->ep0out->ep);
 	if (retval)
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 407a7a6198a2..7fea4999d352 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -1082,6 +1082,12 @@ static ssize_t ieee1284_id_show(struct device *dev, struct device_attribute *att
 
 static DEVICE_ATTR_RO(ieee1284_id);
 
+static struct attribute *usblp_attrs[] = {
+	&dev_attr_ieee1284_id.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(usblp);
+
 static int usblp_probe(struct usb_interface *intf,
 		       const struct usb_device_id *id)
 {
@@ -1156,9 +1162,6 @@ static int usblp_probe(struct usb_interface *intf,
 
 	/* Retrieve and store the device ID string. */
 	usblp_cache_device_id_string(usblp);
-	retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id);
-	if (retval)
-		goto abort_intfdata;
 
 #ifdef DEBUG
 	usblp_check_status(usblp, 0);
@@ -1189,7 +1192,6 @@ static int usblp_probe(struct usb_interface *intf,
 
 abort_intfdata:
 	usb_set_intfdata(intf, NULL);
-	device_remove_file(&intf->dev, &dev_attr_ieee1284_id);
 abort:
 	kfree(usblp->readbuf);
 	kfree(usblp->statusbuf);
@@ -1360,8 +1362,6 @@ static void usblp_disconnect(struct usb_interface *intf)
 		BUG();
 	}
 
-	device_remove_file(&intf->dev, &dev_attr_ieee1284_id);
-
 	mutex_lock(&usblp_mutex);
 	mutex_lock(&usblp->mut);
 	usblp->present = 0;
@@ -1421,6 +1421,7 @@ static struct usb_driver usblp_driver = {
 	.suspend =	usblp_suspend,
 	.resume =	usblp_resume,
 	.id_table =	usblp_ids,
+	.dev_groups =	usblp_groups,
 	.supports_autosuspend =	1,
 };
 
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 36858ddd8d9b..dcd7066ffba2 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1836,17 +1836,14 @@ capability_attribute(device_capabilities);
 capability_attribute(usb488_interface_capabilities);
 capability_attribute(usb488_device_capabilities);
 
-static struct attribute *capability_attrs[] = {
+static struct attribute *usbtmc_attrs[] = {
 	&dev_attr_interface_capabilities.attr,
 	&dev_attr_device_capabilities.attr,
 	&dev_attr_usb488_interface_capabilities.attr,
 	&dev_attr_usb488_device_capabilities.attr,
 	NULL,
 };
-
-static const struct attribute_group capability_attr_grp = {
-	.attrs = capability_attrs,
-};
+ATTRIBUTE_GROUPS(usbtmc);
 
 static int usbtmc_ioctl_indicator_pulse(struct usbtmc_device_data *data)
 {
@@ -2386,9 +2383,6 @@ static int usbtmc_probe(struct usb_interface *intf,
 	retcode = get_capabilities(data);
 	if (retcode)
 		dev_err(&intf->dev, "can't read capabilities\n");
-	else
-		retcode = sysfs_create_group(&intf->dev.kobj,
-					     &capability_attr_grp);
 
 	if (data->iin_ep_present) {
 		/* allocate int urb */
@@ -2435,7 +2429,6 @@ static int usbtmc_probe(struct usb_interface *intf,
 	return 0;
 
 error_register:
-	sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp);
 	usbtmc_free_int(data);
 err_put:
 	kref_put(&data->kref, usbtmc_delete);
@@ -2448,7 +2441,6 @@ static void usbtmc_disconnect(struct usb_interface *intf)
 	struct list_head *elem;
 
 	usb_deregister_dev(intf, &usbtmc_class);
-	sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp);
 	mutex_lock(&data->io_mutex);
 	data->zombie = 1;
 	wake_up_interruptible_all(&data->waitq);
@@ -2554,6 +2546,7 @@ static struct usb_driver usbtmc_driver = {
 	.resume		= usbtmc_resume,
 	.pre_reset	= usbtmc_pre_reset,
 	.post_reset	= usbtmc_post_reset,
+	.dev_groups	= usbtmc_groups,
 };
 
 module_usb_driver(usbtmc_driver);
diff --git a/drivers/usb/common/Kconfig b/drivers/usb/common/Kconfig
new file mode 100644
index 000000000000..d611477aae41
--- /dev/null
+++ b/drivers/usb/common/Kconfig
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config USB_COMMON
+	tristate
+
+
+config USB_LED_TRIG
+	bool "USB LED Triggers"
+	depends on LEDS_CLASS && LEDS_TRIGGERS
+	select USB_COMMON
+	help
+	  This option adds LED triggers for USB host and/or gadget activity.
+
+	  Say Y here if you are working on a system with led-class supported
+	  LEDs and you want to use them as activity indicators for USB host or
+	  gadget.
+
+config USB_ULPI_BUS
+	tristate "USB ULPI PHY interface support"
+	select USB_COMMON
+	help
+	  UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
+	  USB 2.0 PHY interface. The ULPI specification defines a standard set
+	  of registers that can be used to detect the vendor and product which
+	  allows ULPI to be handled as a bus. This module is the driver for that
+	  bus.
+
+	  The ULPI interfaces (the buses) are registered by the drivers for USB
+	  controllers which support ULPI register access and have ULPI PHY
+	  attached to them. The ULPI PHY drivers themselves are normal PHY
+	  drivers.
+
+	  ULPI PHYs provide often functions such as ADP sensing/probing (OTG
+	  protocol) and USB charger detection.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called ulpi.
+
+config USB_CONN_GPIO
+	tristate "USB GPIO Based Connection Detection Driver"
+	depends on GPIOLIB
+	select USB_ROLE_SWITCH
+	help
+	  The driver supports USB role switch between host and device via GPIO
+	  based USB cable detection, used typically if an input GPIO is used
+	  to detect USB ID pin, and another input GPIO may be also used to detect
+	  Vbus pin at the same time, it also can be used to enable/disable
+	  device if an input GPIO is only used to detect Vbus pin.
+
+	  To compile the driver as a module, choose M here: the module will
+	  be called usb-conn-gpio.ko
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
index 0a7c45e85481..8ac4d21ef5c8 100644
--- a/drivers/usb/common/Makefile
+++ b/drivers/usb/common/Makefile
@@ -5,7 +5,9 @@
 
 obj-$(CONFIG_USB_COMMON)	  += usb-common.o
 usb-common-y			  += common.o
+usb-common-$(CONFIG_TRACING)	  += debug.o
 usb-common-$(CONFIG_USB_LED_TRIG) += led.o
 
+obj-$(CONFIG_USB_CONN_GPIO)	+= usb-conn-gpio.o
 obj-$(CONFIG_USB_OTG_FSM) += usb-otg-fsm.o
 obj-$(CONFIG_USB_ULPI_BUS)	+= ulpi.o
diff --git a/drivers/usb/common/debug.c b/drivers/usb/common/debug.c
new file mode 100644
index 000000000000..92a986aeaa5d
--- /dev/null
+++ b/drivers/usb/common/debug.c
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * Common USB debugging functions
+ *
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ */
+
+#include <linux/usb/ch9.h>
+
+static void usb_decode_get_status(__u8 bRequestType, __u16 wIndex,
+				  __u16 wLength, char *str, size_t size)
+{
+	switch (bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		snprintf(str, size, "Get Device Status(Length = %d)", wLength);
+		break;
+	case USB_RECIP_INTERFACE:
+		snprintf(str, size,
+			 "Get Interface Status(Intf = %d, Length = %d)",
+			 wIndex, wLength);
+		break;
+	case USB_RECIP_ENDPOINT:
+		snprintf(str, size, "Get Endpoint Status(ep%d%s)",
+			 wIndex & ~USB_DIR_IN,
+			 wIndex & USB_DIR_IN ? "in" : "out");
+		break;
+	}
+}
+
+static const char *usb_decode_device_feature(u16 wValue)
+{
+	switch (wValue) {
+	case USB_DEVICE_SELF_POWERED:
+		return "Self Powered";
+	case USB_DEVICE_REMOTE_WAKEUP:
+		return "Remote Wakeup";
+	case USB_DEVICE_TEST_MODE:
+		return "Test Mode";
+	case USB_DEVICE_U1_ENABLE:
+		return "U1 Enable";
+	case USB_DEVICE_U2_ENABLE:
+		return "U2 Enable";
+	case USB_DEVICE_LTM_ENABLE:
+		return "LTM Enable";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static const char *usb_decode_test_mode(u16 wIndex)
+{
+	switch (wIndex) {
+	case TEST_J:
+		return ": TEST_J";
+	case TEST_K:
+		return ": TEST_K";
+	case TEST_SE0_NAK:
+		return ": TEST_SE0_NAK";
+	case TEST_PACKET:
+		return ": TEST_PACKET";
+	case TEST_FORCE_EN:
+		return ": TEST_FORCE_EN";
+	default:
+		return ": UNKNOWN";
+	}
+}
+
+static void usb_decode_set_clear_feature(__u8 bRequestType,
+					 __u8 bRequest, __u16 wValue,
+					 __u16 wIndex, char *str, size_t size)
+{
+	switch (bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		snprintf(str, size, "%s Device Feature(%s%s)",
+			 bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+			 usb_decode_device_feature(wValue),
+			 wValue == USB_DEVICE_TEST_MODE ?
+			 usb_decode_test_mode(wIndex) : "");
+		break;
+	case USB_RECIP_INTERFACE:
+		snprintf(str, size, "%s Interface Feature(%s)",
+			 bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+			 wValue == USB_INTRF_FUNC_SUSPEND ?
+			 "Function Suspend" : "UNKNOWN");
+		break;
+	case USB_RECIP_ENDPOINT:
+		snprintf(str, size, "%s Endpoint Feature(%s ep%d%s)",
+			 bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+			 wValue == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN",
+			 wIndex & ~USB_DIR_IN,
+			 wIndex & USB_DIR_IN ? "in" : "out");
+		break;
+	}
+}
+
+static void usb_decode_set_address(__u16 wValue, char *str, size_t size)
+{
+	snprintf(str, size, "Set Address(Addr = %02x)", wValue);
+}
+
+static void usb_decode_get_set_descriptor(__u8 bRequestType, __u8 bRequest,
+					  __u16 wValue, __u16 wIndex,
+					  __u16 wLength, char *str, size_t size)
+{
+	char *s;
+
+	switch (wValue >> 8) {
+	case USB_DT_DEVICE:
+		s = "Device";
+		break;
+	case USB_DT_CONFIG:
+		s = "Configuration";
+		break;
+	case USB_DT_STRING:
+		s = "String";
+		break;
+	case USB_DT_INTERFACE:
+		s = "Interface";
+		break;
+	case USB_DT_ENDPOINT:
+		s = "Endpoint";
+		break;
+	case USB_DT_DEVICE_QUALIFIER:
+		s = "Device Qualifier";
+		break;
+	case USB_DT_OTHER_SPEED_CONFIG:
+		s = "Other Speed Config";
+		break;
+	case USB_DT_INTERFACE_POWER:
+		s = "Interface Power";
+		break;
+	case USB_DT_OTG:
+		s = "OTG";
+		break;
+	case USB_DT_DEBUG:
+		s = "Debug";
+		break;
+	case USB_DT_INTERFACE_ASSOCIATION:
+		s = "Interface Association";
+		break;
+	case USB_DT_BOS:
+		s = "BOS";
+		break;
+	case USB_DT_DEVICE_CAPABILITY:
+		s = "Device Capability";
+		break;
+	case USB_DT_PIPE_USAGE:
+		s = "Pipe Usage";
+		break;
+	case USB_DT_SS_ENDPOINT_COMP:
+		s = "SS Endpoint Companion";
+		break;
+	case USB_DT_SSP_ISOC_ENDPOINT_COMP:
+		s = "SSP Isochronous Endpoint Companion";
+		break;
+	default:
+		s = "UNKNOWN";
+		break;
+	}
+
+	snprintf(str, size, "%s %s Descriptor(Index = %d, Length = %d)",
+		bRequest == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
+		s, wValue & 0xff, wLength);
+}
+
+static void usb_decode_get_configuration(__u16 wLength, char *str, size_t size)
+{
+	snprintf(str, size, "Get Configuration(Length = %d)", wLength);
+}
+
+static void usb_decode_set_configuration(__u8 wValue, char *str, size_t size)
+{
+	snprintf(str, size, "Set Configuration(Config = %d)", wValue);
+}
+
+static void usb_decode_get_intf(__u16 wIndex, __u16 wLength, char *str,
+				size_t size)
+{
+	snprintf(str, size, "Get Interface(Intf = %d, Length = %d)",
+		 wIndex, wLength);
+}
+
+static void usb_decode_set_intf(__u8 wValue, __u16 wIndex, char *str,
+				size_t size)
+{
+	snprintf(str, size, "Set Interface(Intf = %d, Alt.Setting = %d)",
+		 wIndex, wValue);
+}
+
+static void usb_decode_synch_frame(__u16 wIndex, __u16 wLength,
+				   char *str, size_t size)
+{
+	snprintf(str, size, "Synch Frame(Endpoint = %d, Length = %d)",
+		 wIndex, wLength);
+}
+
+static void usb_decode_set_sel(__u16 wLength, char *str, size_t size)
+{
+	snprintf(str, size, "Set SEL(Length = %d)", wLength);
+}
+
+static void usb_decode_set_isoch_delay(__u8 wValue, char *str, size_t size)
+{
+	snprintf(str, size, "Set Isochronous Delay(Delay = %d ns)", wValue);
+}
+
+/**
+ * usb_decode_ctrl - returns a string representation of ctrl request
+ */
+const char *usb_decode_ctrl(char *str, size_t size, __u8 bRequestType,
+			    __u8 bRequest, __u16 wValue, __u16 wIndex,
+			    __u16 wLength)
+{
+	switch (bRequest) {
+	case USB_REQ_GET_STATUS:
+		usb_decode_get_status(bRequestType, wIndex, wLength, str, size);
+		break;
+	case USB_REQ_CLEAR_FEATURE:
+	case USB_REQ_SET_FEATURE:
+		usb_decode_set_clear_feature(bRequestType, bRequest, wValue,
+					     wIndex, str, size);
+		break;
+	case USB_REQ_SET_ADDRESS:
+		usb_decode_set_address(wValue, str, size);
+		break;
+	case USB_REQ_GET_DESCRIPTOR:
+	case USB_REQ_SET_DESCRIPTOR:
+		usb_decode_get_set_descriptor(bRequestType, bRequest, wValue,
+					      wIndex, wLength, str, size);
+		break;
+	case USB_REQ_GET_CONFIGURATION:
+		usb_decode_get_configuration(wLength, str, size);
+		break;
+	case USB_REQ_SET_CONFIGURATION:
+		usb_decode_set_configuration(wValue, str, size);
+		break;
+	case USB_REQ_GET_INTERFACE:
+		usb_decode_get_intf(wIndex, wLength, str, size);
+		break;
+	case USB_REQ_SET_INTERFACE:
+		usb_decode_set_intf(wValue, wIndex, str, size);
+		break;
+	case USB_REQ_SYNCH_FRAME:
+		usb_decode_synch_frame(wIndex, wLength, str, size);
+		break;
+	case USB_REQ_SET_SEL:
+		usb_decode_set_sel(wLength, str, size);
+		break;
+	case USB_REQ_SET_ISOCH_DELAY:
+		usb_decode_set_isoch_delay(wValue, str, size);
+		break;
+	default:
+		snprintf(str, size, "%02x %02x %02x %02x %02x %02x %02x %02x",
+			 bRequestType, bRequest,
+			 (u8)(cpu_to_le16(wValue) & 0xff),
+			 (u8)(cpu_to_le16(wValue) >> 8),
+			 (u8)(cpu_to_le16(wIndex) & 0xff),
+			 (u8)(cpu_to_le16(wIndex) >> 8),
+			 (u8)(cpu_to_le16(wLength) & 0xff),
+			 (u8)(cpu_to_le16(wLength) >> 8));
+	}
+
+	return str;
+}
+EXPORT_SYMBOL_GPL(usb_decode_ctrl);
diff --git a/drivers/usb/common/usb-conn-gpio.c b/drivers/usb/common/usb-conn-gpio.c
new file mode 100644
index 000000000000..87338f9eb5be
--- /dev/null
+++ b/drivers/usb/common/usb-conn-gpio.c
@@ -0,0 +1,284 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB GPIO Based Connection Detection Driver
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ *
+ * Some code borrowed from drivers/extcon/extcon-usb-gpio.c
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/role.h>
+
+#define USB_GPIO_DEB_MS		20	/* ms */
+#define USB_GPIO_DEB_US		((USB_GPIO_DEB_MS) * 1000)	/* us */
+
+#define USB_CONN_IRQF	\
+	(IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT)
+
+struct usb_conn_info {
+	struct device *dev;
+	struct usb_role_switch *role_sw;
+	enum usb_role last_role;
+	struct regulator *vbus;
+	struct delayed_work dw_det;
+	unsigned long debounce_jiffies;
+
+	struct gpio_desc *id_gpiod;
+	struct gpio_desc *vbus_gpiod;
+	int id_irq;
+	int vbus_irq;
+};
+
+/**
+ * "DEVICE" = VBUS and "HOST" = !ID, so we have:
+ * Both "DEVICE" and "HOST" can't be set as active at the same time
+ * so if "HOST" is active (i.e. ID is 0)  we keep "DEVICE" inactive
+ * even if VBUS is on.
+ *
+ *  Role          |   ID  |  VBUS
+ * ------------------------------------
+ *  [1] DEVICE    |   H   |   H
+ *  [2] NONE      |   H   |   L
+ *  [3] HOST      |   L   |   H
+ *  [4] HOST      |   L   |   L
+ *
+ * In case we have only one of these signals:
+ * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1
+ * - ID only - we want to distinguish between [1] and [4], so VBUS = ID
+ */
+static void usb_conn_detect_cable(struct work_struct *work)
+{
+	struct usb_conn_info *info;
+	enum usb_role role;
+	int id, vbus, ret;
+
+	info = container_of(to_delayed_work(work),
+			    struct usb_conn_info, dw_det);
+
+	/* check ID and VBUS */
+	id = info->id_gpiod ?
+		gpiod_get_value_cansleep(info->id_gpiod) : 1;
+	vbus = info->vbus_gpiod ?
+		gpiod_get_value_cansleep(info->vbus_gpiod) : id;
+
+	if (!id)
+		role = USB_ROLE_HOST;
+	else if (vbus)
+		role = USB_ROLE_DEVICE;
+	else
+		role = USB_ROLE_NONE;
+
+	dev_dbg(info->dev, "role %d/%d, gpios: id %d, vbus %d\n",
+		info->last_role, role, id, vbus);
+
+	if (info->last_role == role) {
+		dev_warn(info->dev, "repeated role: %d\n", role);
+		return;
+	}
+
+	if (info->last_role == USB_ROLE_HOST)
+		regulator_disable(info->vbus);
+
+	ret = usb_role_switch_set_role(info->role_sw, role);
+	if (ret)
+		dev_err(info->dev, "failed to set role: %d\n", ret);
+
+	if (role == USB_ROLE_HOST) {
+		ret = regulator_enable(info->vbus);
+		if (ret)
+			dev_err(info->dev, "enable vbus regulator failed\n");
+	}
+
+	info->last_role = role;
+
+	dev_dbg(info->dev, "vbus regulator is %s\n",
+		regulator_is_enabled(info->vbus) ? "enabled" : "disabled");
+}
+
+static void usb_conn_queue_dwork(struct usb_conn_info *info,
+				 unsigned long delay)
+{
+	queue_delayed_work(system_power_efficient_wq, &info->dw_det, delay);
+}
+
+static irqreturn_t usb_conn_isr(int irq, void *dev_id)
+{
+	struct usb_conn_info *info = dev_id;
+
+	usb_conn_queue_dwork(info, info->debounce_jiffies);
+
+	return IRQ_HANDLED;
+}
+
+static int usb_conn_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct usb_conn_info *info;
+	int ret = 0;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->dev = dev;
+	info->id_gpiod = devm_gpiod_get_optional(dev, "id", GPIOD_IN);
+	if (IS_ERR(info->id_gpiod))
+		return PTR_ERR(info->id_gpiod);
+
+	info->vbus_gpiod = devm_gpiod_get_optional(dev, "vbus", GPIOD_IN);
+	if (IS_ERR(info->vbus_gpiod))
+		return PTR_ERR(info->vbus_gpiod);
+
+	if (!info->id_gpiod && !info->vbus_gpiod) {
+		dev_err(dev, "failed to get gpios\n");
+		return -ENODEV;
+	}
+
+	if (info->id_gpiod)
+		ret = gpiod_set_debounce(info->id_gpiod, USB_GPIO_DEB_US);
+	if (!ret && info->vbus_gpiod)
+		ret = gpiod_set_debounce(info->vbus_gpiod, USB_GPIO_DEB_US);
+	if (ret < 0)
+		info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEB_MS);
+
+	INIT_DELAYED_WORK(&info->dw_det, usb_conn_detect_cable);
+
+	info->vbus = devm_regulator_get(dev, "vbus");
+	if (IS_ERR(info->vbus)) {
+		dev_err(dev, "failed to get vbus\n");
+		return PTR_ERR(info->vbus);
+	}
+
+	info->role_sw = usb_role_switch_get(dev);
+	if (IS_ERR(info->role_sw)) {
+		if (PTR_ERR(info->role_sw) != -EPROBE_DEFER)
+			dev_err(dev, "failed to get role switch\n");
+
+		return PTR_ERR(info->role_sw);
+	}
+
+	if (info->id_gpiod) {
+		info->id_irq = gpiod_to_irq(info->id_gpiod);
+		if (info->id_irq < 0) {
+			dev_err(dev, "failed to get ID IRQ\n");
+			ret = info->id_irq;
+			goto put_role_sw;
+		}
+
+		ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
+						usb_conn_isr, USB_CONN_IRQF,
+						pdev->name, info);
+		if (ret < 0) {
+			dev_err(dev, "failed to request ID IRQ\n");
+			goto put_role_sw;
+		}
+	}
+
+	if (info->vbus_gpiod) {
+		info->vbus_irq = gpiod_to_irq(info->vbus_gpiod);
+		if (info->vbus_irq < 0) {
+			dev_err(dev, "failed to get VBUS IRQ\n");
+			ret = info->vbus_irq;
+			goto put_role_sw;
+		}
+
+		ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
+						usb_conn_isr, USB_CONN_IRQF,
+						pdev->name, info);
+		if (ret < 0) {
+			dev_err(dev, "failed to request VBUS IRQ\n");
+			goto put_role_sw;
+		}
+	}
+
+	platform_set_drvdata(pdev, info);
+
+	/* Perform initial detection */
+	usb_conn_queue_dwork(info, 0);
+
+	return 0;
+
+put_role_sw:
+	usb_role_switch_put(info->role_sw);
+	return ret;
+}
+
+static int usb_conn_remove(struct platform_device *pdev)
+{
+	struct usb_conn_info *info = platform_get_drvdata(pdev);
+
+	cancel_delayed_work_sync(&info->dw_det);
+
+	if (info->last_role == USB_ROLE_HOST)
+		regulator_disable(info->vbus);
+
+	usb_role_switch_put(info->role_sw);
+
+	return 0;
+}
+
+static int __maybe_unused usb_conn_suspend(struct device *dev)
+{
+	struct usb_conn_info *info = dev_get_drvdata(dev);
+
+	if (info->id_gpiod)
+		disable_irq(info->id_irq);
+	if (info->vbus_gpiod)
+		disable_irq(info->vbus_irq);
+
+	pinctrl_pm_select_sleep_state(dev);
+
+	return 0;
+}
+
+static int __maybe_unused usb_conn_resume(struct device *dev)
+{
+	struct usb_conn_info *info = dev_get_drvdata(dev);
+
+	pinctrl_pm_select_default_state(dev);
+
+	if (info->id_gpiod)
+		enable_irq(info->id_irq);
+	if (info->vbus_gpiod)
+		enable_irq(info->vbus_irq);
+
+	usb_conn_queue_dwork(info, 0);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(usb_conn_pm_ops,
+			 usb_conn_suspend, usb_conn_resume);
+
+static const struct of_device_id usb_conn_dt_match[] = {
+	{ .compatible = "gpio-usb-b-connector", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, usb_conn_dt_match);
+
+static struct platform_driver usb_conn_driver = {
+	.probe		= usb_conn_probe,
+	.remove		= usb_conn_remove,
+	.driver		= {
+		.name	= "usb-conn-gpio",
+		.pm	= &usb_conn_pm_ops,
+		.of_match_table = usb_conn_dt_match,
+	},
+};
+
+module_platform_driver(usb_conn_driver);
+
+MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
+MODULE_DESCRIPTION("USB GPIO based connection detection driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 9d6cb709ca7b..151a74a54386 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -921,7 +921,7 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 	struct usb_bos_descriptor *bos;
 	struct usb_dev_cap_header *cap;
 	struct usb_ssp_cap_descriptor *ssp_cap;
-	unsigned char *buffer;
+	unsigned char *buffer, *buffer0;
 	int length, total_len, num, i, ssac;
 	__u8 cap_type;
 	int ret;
@@ -966,10 +966,12 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 			ret = -ENOMSG;
 		goto err;
 	}
+
+	buffer0 = buffer;
 	total_len -= length;
+	buffer += length;
 
 	for (i = 0; i < num; i++) {
-		buffer += length;
 		cap = (struct usb_dev_cap_header *)buffer;
 
 		if (total_len < sizeof(*cap) || total_len < cap->bLength) {
@@ -983,8 +985,6 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 			break;
 		}
 
-		total_len -= length;
-
 		if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
 			dev_warn(ddev, "descriptor type invalid, skip\n");
 			continue;
@@ -1019,7 +1019,11 @@ int usb_get_bos_descriptor(struct usb_device *dev)
 		default:
 			break;
 		}
+
+		total_len -= length;
+		buffer += length;
 	}
+	dev->bos->desc->wTotalLength = cpu_to_le16(buffer - buffer0);
 
 	return 0;
 
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index e3696601e43b..3f899552f6e3 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -44,10 +44,19 @@
 
 #include "usb.h"
 
+#ifdef CONFIG_PM
+#define MAYBE_CAP_SUSPEND	USBDEVFS_CAP_SUSPEND
+#else
+#define MAYBE_CAP_SUSPEND	0
+#endif
+
 #define USB_MAXBUS			64
 #define USB_DEVICE_MAX			(USB_MAXBUS * 128)
 #define USB_SG_SIZE			16384 /* split-size for large txs */
 
+/* Mutual exclusion for ps->list in resume vs. release and remove */
+static DEFINE_MUTEX(usbfs_mutex);
+
 struct usb_dev_state {
 	struct list_head list;      /* state list */
 	struct usb_device *dev;
@@ -57,14 +66,17 @@ struct usb_dev_state {
 	struct list_head async_completed;
 	struct list_head memory_list;
 	wait_queue_head_t wait;     /* wake up if a request completed */
+	wait_queue_head_t wait_for_resume;   /* wake up upon runtime resume */
 	unsigned int discsignr;
 	struct pid *disc_pid;
 	const struct cred *cred;
 	sigval_t disccontext;
 	unsigned long ifclaimed;
 	u32 disabled_bulk_eps;
-	bool privileges_dropped;
 	unsigned long interface_allowed_mask;
+	int not_yet_resumed;
+	bool suspend_allowed;
+	bool privileges_dropped;
 };
 
 struct usb_memory {
@@ -694,9 +706,7 @@ static void driver_disconnect(struct usb_interface *intf)
 	destroy_async_on_interface(ps, ifnum);
 }
 
-/* The following routines are merely placeholders.  There is no way
- * to inform a user task about suspend or resumes.
- */
+/* We don't care about suspend/resume of claimed interfaces */
 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
 {
 	return 0;
@@ -707,12 +717,32 @@ static int driver_resume(struct usb_interface *intf)
 	return 0;
 }
 
+/* The following routines apply to the entire device, not interfaces */
+void usbfs_notify_suspend(struct usb_device *udev)
+{
+	/* We don't need to handle this */
+}
+
+void usbfs_notify_resume(struct usb_device *udev)
+{
+	struct usb_dev_state *ps;
+
+	/* Protect against simultaneous remove or release */
+	mutex_lock(&usbfs_mutex);
+	list_for_each_entry(ps, &udev->filelist, list) {
+		WRITE_ONCE(ps->not_yet_resumed, 0);
+		wake_up_all(&ps->wait_for_resume);
+	}
+	mutex_unlock(&usbfs_mutex);
+}
+
 struct usb_driver usbfs_driver = {
 	.name =		"usbfs",
 	.probe =	driver_probe,
 	.disconnect =	driver_disconnect,
 	.suspend =	driver_suspend,
 	.resume =	driver_resume,
+	.supports_autosuspend = 1,
 };
 
 static int claimintf(struct usb_dev_state *ps, unsigned int ifnum)
@@ -991,9 +1021,12 @@ static int usbdev_open(struct inode *inode, struct file *file)
 	INIT_LIST_HEAD(&ps->async_completed);
 	INIT_LIST_HEAD(&ps->memory_list);
 	init_waitqueue_head(&ps->wait);
+	init_waitqueue_head(&ps->wait_for_resume);
 	ps->disc_pid = get_pid(task_pid(current));
 	ps->cred = get_current_cred();
 	smp_wmb();
+
+	/* Can't race with resume; the device is already active */
 	list_add_tail(&ps->list, &dev->filelist);
 	file->private_data = ps;
 	usb_unlock_device(dev);
@@ -1019,7 +1052,10 @@ static int usbdev_release(struct inode *inode, struct file *file)
 	usb_lock_device(dev);
 	usb_hub_release_all_ports(dev, ps);
 
+	/* Protect against simultaneous resume */
+	mutex_lock(&usbfs_mutex);
 	list_del_init(&ps->list);
+	mutex_unlock(&usbfs_mutex);
 
 	for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
 			ifnum++) {
@@ -1027,7 +1063,8 @@ static int usbdev_release(struct inode *inode, struct file *file)
 			releaseintf(ps, ifnum);
 	}
 	destroy_all_async(ps);
-	usb_autosuspend_device(dev);
+	if (!ps->suspend_allowed)
+		usb_autosuspend_device(dev);
 	usb_unlock_device(dev);
 	usb_put_dev(dev);
 	put_pid(ps->disc_pid);
@@ -1621,7 +1658,8 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
 	if (as->usbm)
 		num_sgs = 0;
 
-	u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
+	u += sizeof(struct async) + sizeof(struct urb) +
+	     (as->usbm ? 0 : uurb->buffer_length) +
 	     num_sgs * sizeof(struct scatterlist);
 	ret = usbfs_increase_memory_usage(u);
 	if (ret)
@@ -2273,7 +2311,8 @@ static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg)
 
 	caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
 			USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP |
-			USBDEVFS_CAP_DROP_PRIVILEGES | USBDEVFS_CAP_CONNINFO_EX;
+			USBDEVFS_CAP_DROP_PRIVILEGES |
+			USBDEVFS_CAP_CONNINFO_EX | MAYBE_CAP_SUSPEND;
 	if (!ps->dev->bus->no_stop_on_short)
 		caps |= USBDEVFS_CAP_BULK_CONTINUATION;
 	if (ps->dev->bus->sg_tablesize)
@@ -2376,6 +2415,47 @@ static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg)
 	return 0;
 }
 
+static int proc_forbid_suspend(struct usb_dev_state *ps)
+{
+	int ret = 0;
+
+	if (ps->suspend_allowed) {
+		ret = usb_autoresume_device(ps->dev);
+		if (ret == 0)
+			ps->suspend_allowed = false;
+		else if (ret != -ENODEV)
+			ret = -EIO;
+	}
+	return ret;
+}
+
+static int proc_allow_suspend(struct usb_dev_state *ps)
+{
+	if (!connected(ps))
+		return -ENODEV;
+
+	WRITE_ONCE(ps->not_yet_resumed, 1);
+	if (!ps->suspend_allowed) {
+		usb_autosuspend_device(ps->dev);
+		ps->suspend_allowed = true;
+	}
+	return 0;
+}
+
+static int proc_wait_for_resume(struct usb_dev_state *ps)
+{
+	int ret;
+
+	usb_unlock_device(ps->dev);
+	ret = wait_event_interruptible(ps->wait_for_resume,
+			READ_ONCE(ps->not_yet_resumed) == 0);
+	usb_lock_device(ps->dev);
+
+	if (ret != 0)
+		return -EINTR;
+	return proc_forbid_suspend(ps);
+}
+
 /*
  * NOTE:  All requests here that have interface numbers as parameters
  * are assuming that somehow the configuration has been prevented from
@@ -2570,6 +2650,15 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 	case USBDEVFS_GET_SPEED:
 		ret = ps->dev->speed;
 		break;
+	case USBDEVFS_FORBID_SUSPEND:
+		ret = proc_forbid_suspend(ps);
+		break;
+	case USBDEVFS_ALLOW_SUSPEND:
+		ret = proc_allow_suspend(ps);
+		break;
+	case USBDEVFS_WAIT_FOR_RESUME:
+		ret = proc_wait_for_resume(ps);
+		break;
 	}
 
 	/* Handle variable-length commands */
@@ -2643,15 +2732,20 @@ static void usbdev_remove(struct usb_device *udev)
 {
 	struct usb_dev_state *ps;
 
+	/* Protect against simultaneous resume */
+	mutex_lock(&usbfs_mutex);
 	while (!list_empty(&udev->filelist)) {
 		ps = list_entry(udev->filelist.next, struct usb_dev_state, list);
 		destroy_all_async(ps);
 		wake_up_all(&ps->wait);
+		WRITE_ONCE(ps->not_yet_resumed, 0);
+		wake_up_all(&ps->wait_for_resume);
 		list_del_init(&ps->list);
 		if (ps->discsignr)
 			kill_pid_usb_asyncio(ps->discsignr, EPIPE, ps->disccontext,
 					     ps->disc_pid, ps->cred);
 	}
+	mutex_unlock(&usbfs_mutex);
 }
 
 static int usbdev_notify(struct notifier_block *self,
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index ebcadaad89d1..2b27d232d7a7 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -892,6 +892,7 @@ int usb_register_device_driver(struct usb_device_driver *new_udriver,
 	new_udriver->drvwrap.driver.probe = usb_probe_device;
 	new_udriver->drvwrap.driver.remove = usb_unbind_device;
 	new_udriver->drvwrap.driver.owner = owner;
+	new_udriver->drvwrap.driver.dev_groups = new_udriver->dev_groups;
 
 	retval = driver_register(&new_udriver->drvwrap.driver);
 
@@ -954,6 +955,7 @@ int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
 	new_driver->drvwrap.driver.remove = usb_unbind_interface;
 	new_driver->drvwrap.driver.owner = owner;
 	new_driver->drvwrap.driver.mod_name = mod_name;
+	new_driver->drvwrap.driver.dev_groups = new_driver->dev_groups;
 	spin_lock_init(&new_driver->dynids.lock);
 	INIT_LIST_HEAD(&new_driver->dynids.list);
 
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 1ac9c1e5f773..38f8b3e31762 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -257,6 +257,8 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg)
 	else
 		rc = usb_port_suspend(udev, msg);
 
+	if (rc == 0)
+		usbfs_notify_suspend(udev);
 	return rc;
 }
 
@@ -273,6 +275,9 @@ static int generic_resume(struct usb_device *udev, pm_message_t msg)
 		rc = hcd_bus_resume(udev, msg);
 	else
 		rc = usb_port_resume(udev, msg);
+
+	if (rc == 0)
+		usbfs_notify_resume(udev);
 	return rc;
 }
 
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 7537681355f6..9e26b0143a59 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -393,8 +393,7 @@ static inline void powermac_set_asic(struct pci_dev *pci_dev, int enable)
 
 static int check_root_hub_suspended(struct device *dev)
 {
-	struct pci_dev		*pci_dev = to_pci_dev(dev);
-	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
+	struct usb_hcd		*hcd = dev_get_drvdata(dev);
 
 	if (HCD_RH_RUNNING(hcd)) {
 		dev_warn(dev, "Root hub is not suspended\n");
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 8592c0344fe8..f225eaa98ff8 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1249,9 +1249,6 @@ EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep);
  * To support host controllers with limited dma capabilities we provide dma
  * bounce buffers. This feature can be enabled by initializing
  * hcd->localmem_pool using usb_hcd_setup_local_mem().
- * For this to work properly the host controller code must first use the
- * function dma_declare_coherent_memory() to point out which memory area
- * that should be used for dma allocations.
  *
  * The initialized hcd->localmem_pool then tells the usb code to allocate all
  * data for dma using the genalloc API.
@@ -2191,6 +2188,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
 	hcd->state = HC_STATE_RESUMING;
 	status = hcd->driver->bus_resume(hcd);
 	clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags);
+	if (status == 0)
+		status = usb_phy_roothub_calibrate(hcd->phy_roothub);
+
 	if (status == 0) {
 		struct usb_device *udev;
 		int port1;
@@ -2454,7 +2454,6 @@ struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
 	hcd->self.controller = dev;
 	hcd->self.sysdev = sysdev;
 	hcd->self.bus_name = bus_name;
-	hcd->self.uses_dma = (sysdev->dma_mask != NULL);
 
 	timer_setup(&hcd->rh_timer, rh_timer_func, 0);
 #ifdef CONFIG_PM
@@ -2764,6 +2763,10 @@ int usb_add_hcd(struct usb_hcd *hcd,
 	}
 	hcd->rh_pollable = 1;
 
+	retval = usb_phy_roothub_calibrate(hcd->phy_roothub);
+	if (retval)
+		goto err_hcd_driver_setup;
+
 	/* NOTE: root hub and controller capabilities may not be the same */
 	if (device_can_wakeup(hcd->self.controller)
 			&& device_can_wakeup(&hcd->self.root_hub->dev))
diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c
index 7580493b867a..fb1588e7c282 100644
--- a/drivers/usb/core/phy.c
+++ b/drivers/usb/core/phy.c
@@ -151,6 +151,27 @@ err_out:
 }
 EXPORT_SYMBOL_GPL(usb_phy_roothub_set_mode);
 
+int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub)
+{
+	struct usb_phy_roothub *roothub_entry;
+	struct list_head *head;
+	int err;
+
+	if (!phy_roothub)
+		return 0;
+
+	head = &phy_roothub->list;
+
+	list_for_each_entry(roothub_entry, head, list) {
+		err = phy_calibrate(roothub_entry->phy);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_phy_roothub_calibrate);
+
 int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub)
 {
 	struct usb_phy_roothub *roothub_entry;
diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h
index dad564e2d2d4..20a267cd986b 100644
--- a/drivers/usb/core/phy.h
+++ b/drivers/usb/core/phy.h
@@ -18,6 +18,7 @@ int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub);
 
 int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub,
 			     enum phy_mode mode);
+int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub);
 int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub);
 void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub);
 
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index 1a06a4b5fbb1..bbbb35fa639f 100644
--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
@@ -285,6 +285,14 @@ static int usb_port_runtime_suspend(struct device *dev)
 }
 #endif
 
+static void usb_port_shutdown(struct device *dev)
+{
+	struct usb_port *port_dev = to_usb_port(dev);
+
+	if (port_dev->child)
+		usb_disable_usb2_hardware_lpm(port_dev->child);
+}
+
 static const struct dev_pm_ops usb_port_pm_ops = {
 #ifdef CONFIG_PM
 	.runtime_suspend =	usb_port_runtime_suspend,
@@ -301,6 +309,7 @@ struct device_type usb_port_device_type = {
 static struct device_driver usb_port_driver = {
 	.name = "usb",
 	.owner = THIS_MODULE,
+	.shutdown = usb_port_shutdown,
 };
 
 static int link_peers(struct usb_port *left, struct usb_port *right)
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 0ab8738047da..f16c26dc079d 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -933,228 +933,6 @@ void usb_free_coherent(struct usb_device *dev, size_t size, void *addr,
 }
 EXPORT_SYMBOL_GPL(usb_free_coherent);
 
-/**
- * usb_buffer_map - create DMA mapping(s) for an urb
- * @urb: urb whose transfer_buffer/setup_packet will be mapped
- *
- * URB_NO_TRANSFER_DMA_MAP is added to urb->transfer_flags if the operation
- * succeeds. If the device is connected to this system through a non-DMA
- * controller, this operation always succeeds.
- *
- * This call would normally be used for an urb which is reused, perhaps
- * as the target of a large periodic transfer, with usb_buffer_dmasync()
- * calls to synchronize memory and dma state.
- *
- * Reverse the effect of this call with usb_buffer_unmap().
- *
- * Return: Either %NULL (indicating no buffer could be mapped), or @urb.
- *
- */
-#if 0
-struct urb *usb_buffer_map(struct urb *urb)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!urb
-			|| !urb->dev
-			|| !(bus = urb->dev->bus)
-			|| !(controller = bus->sysdev))
-		return NULL;
-
-	if (controller->dma_mask) {
-		urb->transfer_dma = dma_map_single(controller,
-			urb->transfer_buffer, urb->transfer_buffer_length,
-			usb_pipein(urb->pipe)
-				? DMA_FROM_DEVICE : DMA_TO_DEVICE);
-	/* FIXME generic api broken like pci, can't report errors */
-	/* if (urb->transfer_dma == DMA_ADDR_INVALID) return 0; */
-	} else
-		urb->transfer_dma = ~0;
-	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-	return urb;
-}
-EXPORT_SYMBOL_GPL(usb_buffer_map);
-#endif  /*  0  */
-
-/* XXX DISABLED, no users currently.  If you wish to re-enable this
- * XXX please determine whether the sync is to transfer ownership of
- * XXX the buffer from device to cpu or vice verse, and thusly use the
- * XXX appropriate _for_{cpu,device}() method.  -DaveM
- */
-#if 0
-
-/**
- * usb_buffer_dmasync - synchronize DMA and CPU view of buffer(s)
- * @urb: urb whose transfer_buffer/setup_packet will be synchronized
- */
-void usb_buffer_dmasync(struct urb *urb)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!urb
-			|| !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
-			|| !urb->dev
-			|| !(bus = urb->dev->bus)
-			|| !(controller = bus->sysdev))
-		return;
-
-	if (controller->dma_mask) {
-		dma_sync_single_for_cpu(controller,
-			urb->transfer_dma, urb->transfer_buffer_length,
-			usb_pipein(urb->pipe)
-				? DMA_FROM_DEVICE : DMA_TO_DEVICE);
-		if (usb_pipecontrol(urb->pipe))
-			dma_sync_single_for_cpu(controller,
-					urb->setup_dma,
-					sizeof(struct usb_ctrlrequest),
-					DMA_TO_DEVICE);
-	}
-}
-EXPORT_SYMBOL_GPL(usb_buffer_dmasync);
-#endif
-
-/**
- * usb_buffer_unmap - free DMA mapping(s) for an urb
- * @urb: urb whose transfer_buffer will be unmapped
- *
- * Reverses the effect of usb_buffer_map().
- */
-#if 0
-void usb_buffer_unmap(struct urb *urb)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!urb
-			|| !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
-			|| !urb->dev
-			|| !(bus = urb->dev->bus)
-			|| !(controller = bus->sysdev))
-		return;
-
-	if (controller->dma_mask) {
-		dma_unmap_single(controller,
-			urb->transfer_dma, urb->transfer_buffer_length,
-			usb_pipein(urb->pipe)
-				? DMA_FROM_DEVICE : DMA_TO_DEVICE);
-	}
-	urb->transfer_flags &= ~URB_NO_TRANSFER_DMA_MAP;
-}
-EXPORT_SYMBOL_GPL(usb_buffer_unmap);
-#endif  /*  0  */
-
-#if 0
-/**
- * usb_buffer_map_sg - create scatterlist DMA mapping(s) for an endpoint
- * @dev: device to which the scatterlist will be mapped
- * @is_in: mapping transfer direction
- * @sg: the scatterlist to map
- * @nents: the number of entries in the scatterlist
- *
- * Return: Either < 0 (indicating no buffers could be mapped), or the
- * number of DMA mapping array entries in the scatterlist.
- *
- * Note:
- * The caller is responsible for placing the resulting DMA addresses from
- * the scatterlist into URB transfer buffer pointers, and for setting the
- * URB_NO_TRANSFER_DMA_MAP transfer flag in each of those URBs.
- *
- * Top I/O rates come from queuing URBs, instead of waiting for each one
- * to complete before starting the next I/O.   This is particularly easy
- * to do with scatterlists.  Just allocate and submit one URB for each DMA
- * mapping entry returned, stopping on the first error or when all succeed.
- * Better yet, use the usb_sg_*() calls, which do that (and more) for you.
- *
- * This call would normally be used when translating scatterlist requests,
- * rather than usb_buffer_map(), since on some hardware (with IOMMUs) it
- * may be able to coalesce mappings for improved I/O efficiency.
- *
- * Reverse the effect of this call with usb_buffer_unmap_sg().
- */
-int usb_buffer_map_sg(const struct usb_device *dev, int is_in,
-		      struct scatterlist *sg, int nents)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!dev
-			|| !(bus = dev->bus)
-			|| !(controller = bus->sysdev)
-			|| !controller->dma_mask)
-		return -EINVAL;
-
-	/* FIXME generic api broken like pci, can't report errors */
-	return dma_map_sg(controller, sg, nents,
-			is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE) ? : -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(usb_buffer_map_sg);
-#endif
-
-/* XXX DISABLED, no users currently.  If you wish to re-enable this
- * XXX please determine whether the sync is to transfer ownership of
- * XXX the buffer from device to cpu or vice verse, and thusly use the
- * XXX appropriate _for_{cpu,device}() method.  -DaveM
- */
-#if 0
-
-/**
- * usb_buffer_dmasync_sg - synchronize DMA and CPU view of scatterlist buffer(s)
- * @dev: device to which the scatterlist will be mapped
- * @is_in: mapping transfer direction
- * @sg: the scatterlist to synchronize
- * @n_hw_ents: the positive return value from usb_buffer_map_sg
- *
- * Use this when you are re-using a scatterlist's data buffers for
- * another USB request.
- */
-void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in,
-			   struct scatterlist *sg, int n_hw_ents)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!dev
-			|| !(bus = dev->bus)
-			|| !(controller = bus->sysdev)
-			|| !controller->dma_mask)
-		return;
-
-	dma_sync_sg_for_cpu(controller, sg, n_hw_ents,
-			    is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
-}
-EXPORT_SYMBOL_GPL(usb_buffer_dmasync_sg);
-#endif
-
-#if 0
-/**
- * usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist
- * @dev: device to which the scatterlist will be mapped
- * @is_in: mapping transfer direction
- * @sg: the scatterlist to unmap
- * @n_hw_ents: the positive return value from usb_buffer_map_sg
- *
- * Reverses the effect of usb_buffer_map_sg().
- */
-void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in,
-			 struct scatterlist *sg, int n_hw_ents)
-{
-	struct usb_bus		*bus;
-	struct device		*controller;
-
-	if (!dev
-			|| !(bus = dev->bus)
-			|| !(controller = bus->sysdev)
-			|| !controller->dma_mask)
-		return;
-
-	dma_unmap_sg(controller, sg, n_hw_ents,
-			is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
-}
-EXPORT_SYMBOL_GPL(usb_buffer_unmap_sg);
-#endif
-
 /*
  * Notifications of device and interface registration
  */
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 0c9fde5ad052..cf4783cf661a 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -95,6 +95,9 @@ extern int usb_runtime_idle(struct device *dev);
 extern int usb_enable_usb2_hardware_lpm(struct usb_device *udev);
 extern int usb_disable_usb2_hardware_lpm(struct usb_device *udev);
 
+extern void usbfs_notify_suspend(struct usb_device *udev);
+extern void usbfs_notify_resume(struct usb_device *udev);
+
 #else
 
 static inline int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index bff48a8a1984..6be10e496e10 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3224,14 +3224,15 @@ static void kill_all_requests(struct dwc2_hsotg *hsotg,
 			      struct dwc2_hsotg_ep *ep,
 			      int result)
 {
-	struct dwc2_hsotg_req *req, *treq;
 	unsigned int size;
 
 	ep->req = NULL;
 
-	list_for_each_entry_safe(req, treq, &ep->queue, queue)
-		dwc2_hsotg_complete_request(hsotg, ep, req,
-					    result);
+	while (!list_empty(&ep->queue)) {
+		struct dwc2_hsotg_req *req = get_ep_head(ep);
+
+		dwc2_hsotg_complete_request(hsotg, ep, req, result);
+	}
 
 	if (!hsotg->dedicated_fifos)
 		return;
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 111787a137ee..81afe553aa66 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5062,13 +5062,13 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 		dwc2_hc_driver.reset_device = dwc2_reset_device;
 	}
 
+	if (hsotg->params.host_dma)
+		dwc2_hc_driver.flags |= HCD_DMA;
+
 	hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
 	if (!hcd)
 		goto error1;
 
-	if (!hsotg->params.host_dma)
-		hcd->self.uses_dma = 0;
-
 	hcd->has_tt = 1;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 55f841a54015..31e090ac9f1e 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -404,10 +404,7 @@ static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
 		device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
 					 &p->g_np_tx_fifo_size);
 
-		num = device_property_read_u32_array(hsotg->dev,
-						     "g-tx-fifo-size",
-						     NULL, 0);
-
+		num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
 		if (num > 0) {
 			num = min(num, 15);
 			memset(p->g_tx_fifo_size, 0,
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 80fd3c6dcd1c..3c6ce09a6db5 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -407,10 +407,8 @@ static int dwc2_driver_probe(struct platform_device *dev)
 	spin_lock_init(&hsotg->lock);
 
 	hsotg->irq = platform_get_irq(dev, 0);
-	if (hsotg->irq < 0) {
-		dev_err(&dev->dev, "missing IRQ resource\n");
+	if (hsotg->irq < 0)
 		return hsotg->irq;
-	}
 
 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
 		hsotg->irq);
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c9bb93a2c81e..999ce5e84d3c 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -168,7 +168,6 @@ static void __dwc3_set_mode(struct work_struct *work)
 				otg_set_vbus(dwc->usb2_phy->otg, true);
 			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
 			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
-			phy_calibrate(dwc->usb2_generic_phy);
 		}
 		break;
 	case DWC3_GCTL_PRTCAP_DEVICE:
@@ -252,12 +251,25 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
 	reg |= DWC3_DCTL_CSFTRST;
 	dwc3_writel(dwc->regs, DWC3_DCTL, reg);
 
+	/*
+	 * For DWC_usb31 controller 1.90a and later, the DCTL.CSFRST bit
+	 * is cleared only after all the clocks are synchronized. This can
+	 * take a little more than 50ms. Set the polling rate at 20ms
+	 * for 10 times instead.
+	 */
+	if (dwc3_is_usb31(dwc) && dwc->revision >= DWC3_USB31_REVISION_190A)
+		retries = 10;
+
 	do {
 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 		if (!(reg & DWC3_DCTL_CSFTRST))
 			goto done;
 
-		udelay(1);
+		if (dwc3_is_usb31(dwc) &&
+		    dwc->revision >= DWC3_USB31_REVISION_190A)
+			msleep(20);
+		else
+			udelay(1);
 	} while (--retries);
 
 	phy_exit(dwc->usb3_generic_phy);
@@ -267,11 +279,11 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
 
 done:
 	/*
-	 * For DWC_usb31 controller, once DWC3_DCTL_CSFTRST bit is cleared,
-	 * we must wait at least 50ms before accessing the PHY domain
-	 * (synchronization delay). DWC_usb31 programming guide section 1.3.2.
+	 * For DWC_usb31 controller 1.80a and prior, once DCTL.CSFRST bit
+	 * is cleared, we must wait at least 50ms before accessing the PHY
+	 * domain (synchronization delay).
 	 */
-	if (dwc3_is_usb31(dwc))
+	if (dwc3_is_usb31(dwc) && dwc->revision <= DWC3_USB31_REVISION_180A)
 		msleep(50);
 
 	return 0;
@@ -686,8 +698,7 @@ static void dwc3_core_exit(struct dwc3 *dwc)
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
 	phy_power_off(dwc->usb2_generic_phy);
 	phy_power_off(dwc->usb3_generic_phy);
-	clk_bulk_disable(dwc->num_clks, dwc->clks);
-	clk_bulk_unprepare(dwc->num_clks, dwc->clks);
+	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
 	reset_control_assert(dwc->reset);
 }
 
@@ -813,8 +824,7 @@ static void dwc3_set_incr_burst_type(struct dwc3 *dwc)
 	 * result = 1, means INCRx burst mode supported.
 	 * result > 1, means undefined length burst mode supported.
 	 */
-	ntype = device_property_read_u32_array(dev,
-			"snps,incr-burst-type-adjustment", NULL, 0);
+	ntype = device_property_count_u32(dev, "snps,incr-burst-type-adjustment");
 	if (ntype <= 0)
 		return;
 
@@ -1166,7 +1176,6 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 				dev_err(dev, "failed to initialize host\n");
 			return ret;
 		}
-		phy_calibrate(dwc->usb2_generic_phy);
 		break;
 	case USB_DR_MODE_OTG:
 		INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
@@ -1310,8 +1319,7 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
 	dwc->tx_de_emphasis = tx_de_emphasis;
 
-	dwc->hird_threshold = hird_threshold
-		| (dwc->is_utmi_l1_suspend << 4);
+	dwc->hird_threshold = hird_threshold;
 
 	dwc->rx_thr_num_pkt_prd = rx_thr_num_pkt_prd;
 	dwc->rx_max_burst_prd = rx_max_burst_prd;
@@ -1436,7 +1444,7 @@ static int dwc3_probe(struct platform_device *pdev)
 	if (dev->of_node) {
 		dwc->num_clks = ARRAY_SIZE(dwc3_core_clks);
 
-		ret = clk_bulk_get(dev, dwc->num_clks, dwc->clks);
+		ret = devm_clk_bulk_get(dev, dwc->num_clks, dwc->clks);
 		if (ret == -EPROBE_DEFER)
 			return ret;
 		/*
@@ -1449,16 +1457,12 @@ static int dwc3_probe(struct platform_device *pdev)
 
 	ret = reset_control_deassert(dwc->reset);
 	if (ret)
-		goto put_clks;
+		return ret;
 
-	ret = clk_bulk_prepare(dwc->num_clks, dwc->clks);
+	ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
 	if (ret)
 		goto assert_reset;
 
-	ret = clk_bulk_enable(dwc->num_clks, dwc->clks);
-	if (ret)
-		goto unprepare_clks;
-
 	if (!dwc3_core_is_valid(dwc)) {
 		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
 		ret = -ENODEV;
@@ -1531,13 +1535,9 @@ err1:
 	pm_runtime_disable(&pdev->dev);
 
 disable_clks:
-	clk_bulk_disable(dwc->num_clks, dwc->clks);
-unprepare_clks:
-	clk_bulk_unprepare(dwc->num_clks, dwc->clks);
+	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
 assert_reset:
 	reset_control_assert(dwc->reset);
-put_clks:
-	clk_bulk_put(dwc->num_clks, dwc->clks);
 
 	return ret;
 }
@@ -1560,7 +1560,6 @@ static int dwc3_remove(struct platform_device *pdev)
 
 	dwc3_free_event_buffers(dwc);
 	dwc3_free_scratch_buffers(dwc);
-	clk_bulk_put(dwc->num_clks, dwc->clks);
 
 	return 0;
 }
@@ -1574,14 +1573,10 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 	if (ret)
 		return ret;
 
-	ret = clk_bulk_prepare(dwc->num_clks, dwc->clks);
+	ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
 	if (ret)
 		goto assert_reset;
 
-	ret = clk_bulk_enable(dwc->num_clks, dwc->clks);
-	if (ret)
-		goto unprepare_clks;
-
 	ret = dwc3_core_init(dwc);
 	if (ret)
 		goto disable_clks;
@@ -1589,9 +1584,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 	return 0;
 
 disable_clks:
-	clk_bulk_disable(dwc->num_clks, dwc->clks);
-unprepare_clks:
-	clk_bulk_unprepare(dwc->num_clks, dwc->clks);
+	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
 assert_reset:
 	reset_control_assert(dwc->reset);
 
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 3dd783b889cb..1c8b349379af 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1137,6 +1137,8 @@ struct dwc3 {
 #define DWC3_USB31_REVISION_120A	(0x3132302a | DWC3_REVISION_IS_DWC31)
 #define DWC3_USB31_REVISION_160A	(0x3136302a | DWC3_REVISION_IS_DWC31)
 #define DWC3_USB31_REVISION_170A	(0x3137302a | DWC3_REVISION_IS_DWC31)
+#define DWC3_USB31_REVISION_180A	(0x3138302a | DWC3_REVISION_IS_DWC31)
+#define DWC3_USB31_REVISION_190A	(0x3139302a | DWC3_REVISION_IS_DWC31)
 
 	u32			version_type;
 
diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 068259fdfb0c..9baabed87d61 100644
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -246,258 +246,6 @@ static inline const char *dwc3_gadget_event_string(char *str, size_t size,
 	return str;
 }
 
-static inline void dwc3_decode_get_status(__u8 t, __u16 i, __u16 l, char *str,
-		size_t size)
-{
-	switch (t & USB_RECIP_MASK) {
-	case USB_RECIP_DEVICE:
-		snprintf(str, size, "Get Device Status(Length = %d)", l);
-		break;
-	case USB_RECIP_INTERFACE:
-		snprintf(str, size, "Get Interface Status(Intf = %d, Length = %d)",
-				i, l);
-		break;
-	case USB_RECIP_ENDPOINT:
-		snprintf(str, size, "Get Endpoint Status(ep%d%s)",
-			i & ~USB_DIR_IN,
-			i & USB_DIR_IN ? "in" : "out");
-		break;
-	}
-}
-
-static inline void dwc3_decode_set_clear_feature(__u8 t, __u8 b, __u16 v,
-		__u16 i, char *str, size_t size)
-{
-	switch (t & USB_RECIP_MASK) {
-	case USB_RECIP_DEVICE:
-		snprintf(str, size, "%s Device Feature(%s%s)",
-			b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
-			({char *s;
-				switch (v) {
-				case USB_DEVICE_SELF_POWERED:
-					s = "Self Powered";
-					break;
-				case USB_DEVICE_REMOTE_WAKEUP:
-					s = "Remote Wakeup";
-					break;
-				case USB_DEVICE_TEST_MODE:
-					s = "Test Mode";
-					break;
-				case USB_DEVICE_U1_ENABLE:
-					s = "U1 Enable";
-					break;
-				case USB_DEVICE_U2_ENABLE:
-					s = "U2 Enable";
-					break;
-				case USB_DEVICE_LTM_ENABLE:
-					s = "LTM Enable";
-					break;
-				default:
-					s = "UNKNOWN";
-				} s; }),
-			v == USB_DEVICE_TEST_MODE ?
-			({ char *s;
-				switch (i) {
-				case TEST_J:
-					s = ": TEST_J";
-					break;
-				case TEST_K:
-					s = ": TEST_K";
-					break;
-				case TEST_SE0_NAK:
-					s = ": TEST_SE0_NAK";
-					break;
-				case TEST_PACKET:
-					s = ": TEST_PACKET";
-					break;
-				case TEST_FORCE_EN:
-					s = ": TEST_FORCE_EN";
-					break;
-				default:
-					s = ": UNKNOWN";
-				} s; }) : "");
-		break;
-	case USB_RECIP_INTERFACE:
-		snprintf(str, size, "%s Interface Feature(%s)",
-			b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
-			v == USB_INTRF_FUNC_SUSPEND ?
-			"Function Suspend" : "UNKNOWN");
-		break;
-	case USB_RECIP_ENDPOINT:
-		snprintf(str, size, "%s Endpoint Feature(%s ep%d%s)",
-			b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
-			v == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN",
-			i & ~USB_DIR_IN,
-			i & USB_DIR_IN ? "in" : "out");
-		break;
-	}
-}
-
-static inline void dwc3_decode_set_address(__u16 v, char *str, size_t size)
-{
-	snprintf(str, size, "Set Address(Addr = %02x)", v);
-}
-
-static inline void dwc3_decode_get_set_descriptor(__u8 t, __u8 b, __u16 v,
-		__u16 i, __u16 l, char *str, size_t size)
-{
-	snprintf(str, size, "%s %s Descriptor(Index = %d, Length = %d)",
-		b == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
-		({ char *s;
-			switch (v >> 8) {
-			case USB_DT_DEVICE:
-				s = "Device";
-				break;
-			case USB_DT_CONFIG:
-				s = "Configuration";
-				break;
-			case USB_DT_STRING:
-				s = "String";
-				break;
-			case USB_DT_INTERFACE:
-				s = "Interface";
-				break;
-			case USB_DT_ENDPOINT:
-				s = "Endpoint";
-				break;
-			case USB_DT_DEVICE_QUALIFIER:
-				s = "Device Qualifier";
-				break;
-			case USB_DT_OTHER_SPEED_CONFIG:
-				s = "Other Speed Config";
-				break;
-			case USB_DT_INTERFACE_POWER:
-				s = "Interface Power";
-				break;
-			case USB_DT_OTG:
-				s = "OTG";
-				break;
-			case USB_DT_DEBUG:
-				s = "Debug";
-				break;
-			case USB_DT_INTERFACE_ASSOCIATION:
-				s = "Interface Association";
-				break;
-			case USB_DT_BOS:
-				s = "BOS";
-				break;
-			case USB_DT_DEVICE_CAPABILITY:
-				s = "Device Capability";
-				break;
-			case USB_DT_PIPE_USAGE:
-				s = "Pipe Usage";
-				break;
-			case USB_DT_SS_ENDPOINT_COMP:
-				s = "SS Endpoint Companion";
-				break;
-			case USB_DT_SSP_ISOC_ENDPOINT_COMP:
-				s = "SSP Isochronous Endpoint Companion";
-				break;
-			default:
-				s = "UNKNOWN";
-				break;
-			} s; }), v & 0xff, l);
-}
-
-
-static inline void dwc3_decode_get_configuration(__u16 l, char *str,
-		size_t size)
-{
-	snprintf(str, size, "Get Configuration(Length = %d)", l);
-}
-
-static inline void dwc3_decode_set_configuration(__u8 v, char *str, size_t size)
-{
-	snprintf(str, size, "Set Configuration(Config = %d)", v);
-}
-
-static inline void dwc3_decode_get_intf(__u16 i, __u16 l, char *str,
-		size_t size)
-{
-	snprintf(str, size, "Get Interface(Intf = %d, Length = %d)", i, l);
-}
-
-static inline void dwc3_decode_set_intf(__u8 v, __u16 i, char *str, size_t size)
-{
-	snprintf(str, size, "Set Interface(Intf = %d, Alt.Setting = %d)", i, v);
-}
-
-static inline void dwc3_decode_synch_frame(__u16 i, __u16 l, char *str,
-		size_t size)
-{
-	snprintf(str, size, "Synch Frame(Endpoint = %d, Length = %d)", i, l);
-}
-
-static inline void dwc3_decode_set_sel(__u16 l, char *str, size_t size)
-{
-	snprintf(str, size, "Set SEL(Length = %d)", l);
-}
-
-static inline void dwc3_decode_set_isoch_delay(__u8 v, char *str, size_t size)
-{
-	snprintf(str, size, "Set Isochronous Delay(Delay = %d ns)", v);
-}
-
-/**
- * dwc3_decode_ctrl - returns a string represetion of ctrl request
- */
-static inline const char *dwc3_decode_ctrl(char *str, size_t size,
-		__u8 bRequestType, __u8 bRequest, __u16 wValue, __u16 wIndex,
-		__u16 wLength)
-{
-	switch (bRequest) {
-	case USB_REQ_GET_STATUS:
-		dwc3_decode_get_status(bRequestType, wIndex, wLength, str,
-				size);
-		break;
-	case USB_REQ_CLEAR_FEATURE:
-	case USB_REQ_SET_FEATURE:
-		dwc3_decode_set_clear_feature(bRequestType, bRequest, wValue,
-				wIndex, str, size);
-		break;
-	case USB_REQ_SET_ADDRESS:
-		dwc3_decode_set_address(wValue, str, size);
-		break;
-	case USB_REQ_GET_DESCRIPTOR:
-	case USB_REQ_SET_DESCRIPTOR:
-		dwc3_decode_get_set_descriptor(bRequestType, bRequest, wValue,
-				wIndex, wLength, str, size);
-		break;
-	case USB_REQ_GET_CONFIGURATION:
-		dwc3_decode_get_configuration(wLength, str, size);
-		break;
-	case USB_REQ_SET_CONFIGURATION:
-		dwc3_decode_set_configuration(wValue, str, size);
-		break;
-	case USB_REQ_GET_INTERFACE:
-		dwc3_decode_get_intf(wIndex, wLength, str, size);
-		break;
-	case USB_REQ_SET_INTERFACE:
-		dwc3_decode_set_intf(wValue, wIndex, str, size);
-		break;
-	case USB_REQ_SYNCH_FRAME:
-		dwc3_decode_synch_frame(wIndex, wLength, str, size);
-		break;
-	case USB_REQ_SET_SEL:
-		dwc3_decode_set_sel(wLength, str, size);
-		break;
-	case USB_REQ_SET_ISOCH_DELAY:
-		dwc3_decode_set_isoch_delay(wValue, str, size);
-		break;
-	default:
-		snprintf(str, size, "%02x %02x %02x %02x %02x %02x %02x %02x",
-			bRequestType, bRequest,
-			cpu_to_le16(wValue) & 0xff,
-			cpu_to_le16(wValue) >> 8,
-			cpu_to_le16(wIndex) & 0xff,
-			cpu_to_le16(wIndex) >> 8,
-			cpu_to_le16(wLength) & 0xff,
-			cpu_to_le16(wLength) >> 8);
-	}
-
-	return str;
-}
-
 /**
  * dwc3_ep_event_string - returns event name
  * @event: then event code
diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
index cbee5fb9b9fb..1e14a6f4884b 100644
--- a/drivers/usb/dwc3/dwc3-keystone.c
+++ b/drivers/usb/dwc3/dwc3-keystone.c
@@ -81,7 +81,6 @@ static int kdwc3_probe(struct platform_device *pdev)
 	struct device		*dev = &pdev->dev;
 	struct device_node	*node = pdev->dev.of_node;
 	struct dwc3_keystone	*kdwc;
-	struct resource		*res;
 	int			error, irq;
 
 	kdwc = devm_kzalloc(dev, sizeof(*kdwc), GFP_KERNEL);
@@ -92,8 +91,7 @@ static int kdwc3_probe(struct platform_device *pdev)
 
 	kdwc->dev = dev;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	kdwc->usbss = devm_ioremap_resource(dev, res);
+	kdwc->usbss = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(kdwc->usbss))
 		return PTR_ERR(kdwc->usbss);
 
@@ -112,7 +110,6 @@ static int kdwc3_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
-		dev_err(&pdev->dev, "missing irq\n");
 		error = irq;
 		goto err_irq;
 	}
diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
index bca7e92a10e9..8a3ec1a951fe 100644
--- a/drivers/usb/dwc3/dwc3-meson-g12a.c
+++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -386,7 +386,6 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 	struct device		*dev = &pdev->dev;
 	struct device_node	*np = dev->of_node;
 	void __iomem *base;
-	struct resource *res;
 	enum phy_mode otg_id;
 	int ret, i, irq;
 
@@ -394,8 +393,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
@@ -564,7 +562,13 @@ static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev)
 static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev)
 {
 	struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
-	int i;
+	int i, ret;
+
+	if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) {
+		ret = regulator_disable(priv->vbus);
+		if (ret)
+			return ret;
+	}
 
 	for (i = 0 ; i < PHY_COUNT ; ++i) {
 		phy_power_off(priv->phys[i]);
@@ -599,6 +603,12 @@ static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev)
 			return ret;
 	}
 
+       if (priv->vbus && priv->otg_phy_mode == PHY_MODE_USB_HOST) {
+               ret = regulator_enable(priv->vbus);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index ed8b86517675..8c3de2d258bf 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -14,7 +14,6 @@
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
-#include <linux/platform_data/dwc3-omap.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/ioport.h>
@@ -106,6 +105,12 @@
 #define USBOTGSS_UTMI_OTG_CTRL_SESSVALID	BIT(2)
 #define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID	BIT(1)
 
+enum dwc3_omap_utmi_mode {
+	DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
+	DWC3_OMAP_UTMI_MODE_HW,
+	DWC3_OMAP_UTMI_MODE_SW,
+};
+
 struct dwc3_omap {
 	struct device		*dev;
 
@@ -446,7 +451,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	struct device_node	*node = pdev->dev.of_node;
 
 	struct dwc3_omap	*omap;
-	struct resource		*res;
 	struct device		*dev = &pdev->dev;
 	struct regulator	*vbus_reg = NULL;
 
@@ -469,13 +473,10 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, omap);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "missing IRQ resource: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
index 16081383c401..c682420f25ca 100644
--- a/drivers/usb/dwc3/dwc3-st.c
+++ b/drivers/usb/dwc3/dwc3-st.c
@@ -255,24 +255,26 @@ static int st_dwc3_probe(struct platform_device *pdev)
 	if (!child) {
 		dev_err(&pdev->dev, "failed to find dwc3 core node\n");
 		ret = -ENODEV;
-		goto undo_softreset;
+		goto err_node_put;
 	}
 
 	/* Allocate and initialize the core */
 	ret = of_platform_populate(node, NULL, NULL, dev);
 	if (ret) {
 		dev_err(dev, "failed to add dwc3 core\n");
-		goto undo_softreset;
+		goto err_node_put;
 	}
 
 	child_pdev = of_find_device_by_node(child);
 	if (!child_pdev) {
 		dev_err(dev, "failed to find dwc3 core device\n");
 		ret = -ENODEV;
-		goto undo_softreset;
+		goto err_node_put;
 	}
 
 	dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);
+	of_node_put(child);
+	of_dev_put(child_pdev);
 
 	/*
 	 * Configure the USB port as device or host according to the static
@@ -292,6 +294,8 @@ static int st_dwc3_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, dwc3_data);
 	return 0;
 
+err_node_put:
+	of_node_put(child);
 undo_softreset:
 	reset_control_assert(dwc3_data->rstc_rst);
 undo_powerdown:
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 173f5329d3d9..8adb59f8e4f1 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2078,6 +2078,26 @@ static void dwc3_gadget_config_params(struct usb_gadget *g,
 {
 	struct dwc3		*dwc = gadget_to_dwc(g);
 
+	params->besl_baseline = USB_DEFAULT_BESL_UNSPECIFIED;
+	params->besl_deep = USB_DEFAULT_BESL_UNSPECIFIED;
+
+	/* Recommended BESL */
+	if (!dwc->dis_enblslpm_quirk) {
+		/*
+		 * If the recommended BESL baseline is 0 or if the BESL deep is
+		 * less than 2, Microsoft's Windows 10 host usb stack will issue
+		 * a usb reset immediately after it receives the extended BOS
+		 * descriptor and the enumeration will fail. To maintain
+		 * compatibility with the Windows' usb stack, let's set the
+		 * recommended BESL baseline to 1 and clamp the BESL deep to be
+		 * within 2 to 15.
+		 */
+		params->besl_baseline = 1;
+		if (dwc->is_utmi_l1_suspend)
+			params->besl_deep =
+				clamp_t(u8, dwc->hird_threshold, 2, 15);
+	}
+
 	/* U1 Device exit Latency */
 	if (dwc->dis_u1_entry_quirk)
 		params->bU1devExitLat = 0;
@@ -2868,7 +2888,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 		reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN);
 
-		reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold);
+		reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold |
+					    (dwc->is_utmi_l1_suspend << 4));
 
 		/*
 		 * When dwc3 revisions >= 2.40a, LPM Erratum is enabled and
@@ -3318,7 +3339,6 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	dwc->gadget.speed		= USB_SPEED_UNKNOWN;
 	dwc->gadget.sg_supported	= true;
 	dwc->gadget.name		= "dwc3-gadget";
-	dwc->gadget.is_otg		= dwc->dr_mode == USB_DR_MODE_OTG;
 	dwc->gadget.lpm_capable		= true;
 
 	/*
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index f55947294f7c..8deea8c91e03 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -85,7 +85,7 @@ int dwc3_host_init(struct dwc3 *dwc)
 						DWC3_XHCI_RESOURCES_NUM);
 	if (ret) {
 		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
-		goto err1;
+		goto err;
 	}
 
 	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
@@ -112,37 +112,23 @@ int dwc3_host_init(struct dwc3 *dwc)
 		ret = platform_device_add_properties(xhci, props);
 		if (ret) {
 			dev_err(dwc->dev, "failed to add properties to xHCI\n");
-			goto err1;
+			goto err;
 		}
 	}
 
-	phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
-			  dev_name(dwc->dev));
-	phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
-			  dev_name(dwc->dev));
-
 	ret = platform_device_add(xhci);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register xHCI device\n");
-		goto err2;
+		goto err;
 	}
 
 	return 0;
-err2:
-	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
-			  dev_name(dwc->dev));
-	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
-			  dev_name(dwc->dev));
-err1:
+err:
 	platform_device_put(xhci);
 	return ret;
 }
 
 void dwc3_host_exit(struct dwc3 *dwc)
 {
-	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
-			  dev_name(dwc->dev));
-	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
-			  dev_name(dwc->dev));
 	platform_device_unregister(dwc->xhci);
 }
diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h
index 818a63da1a44..9edff17111f7 100644
--- a/drivers/usb/dwc3/trace.h
+++ b/drivers/usb/dwc3/trace.h
@@ -86,7 +86,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ctrl,
 		__entry->wIndex = le16_to_cpu(ctrl->wIndex);
 		__entry->wLength = le16_to_cpu(ctrl->wLength);
 	),
-	TP_printk("%s", dwc3_decode_ctrl(__get_str(str), DWC3_MSG_MAX,
+	TP_printk("%s", usb_decode_ctrl(__get_str(str), DWC3_MSG_MAX,
 					__entry->bRequestType,
 					__entry->bRequest, __entry->wValue,
 					__entry->wIndex, __entry->wLength)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 76883ff4f5bb..d516e8d6cd7f 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -612,6 +612,7 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	struct usb_ext_cap_descriptor	*usb_ext;
 	struct usb_dcd_config_params	dcd_config_params;
 	struct usb_bos_descriptor	*bos = cdev->req->buf;
+	unsigned int			besl = 0;
 
 	bos->bLength = USB_DT_BOS_SIZE;
 	bos->bDescriptorType = USB_DT_BOS;
@@ -619,6 +620,29 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE);
 	bos->bNumDeviceCaps = 0;
 
+	/* Get Controller configuration */
+	if (cdev->gadget->ops->get_config_params) {
+		cdev->gadget->ops->get_config_params(cdev->gadget,
+						     &dcd_config_params);
+	} else {
+		dcd_config_params.besl_baseline =
+			USB_DEFAULT_BESL_UNSPECIFIED;
+		dcd_config_params.besl_deep =
+			USB_DEFAULT_BESL_UNSPECIFIED;
+		dcd_config_params.bU1devExitLat =
+			USB_DEFAULT_U1_DEV_EXIT_LAT;
+		dcd_config_params.bU2DevExitLat =
+			cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
+	}
+
+	if (dcd_config_params.besl_baseline != USB_DEFAULT_BESL_UNSPECIFIED)
+		besl = USB_BESL_BASELINE_VALID |
+			USB_SET_BESL_BASELINE(dcd_config_params.besl_baseline);
+
+	if (dcd_config_params.besl_deep != USB_DEFAULT_BESL_UNSPECIFIED)
+		besl |= USB_BESL_DEEP_VALID |
+			USB_SET_BESL_DEEP(dcd_config_params.besl_deep);
+
 	/*
 	 * A SuperSpeed device shall include the USB2.0 extension descriptor
 	 * and shall support LPM when operating in USB2.0 HS mode.
@@ -629,7 +653,8 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
 	usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
 	usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
-	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT);
+	usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT |
+					    USB_BESL_SUPPORT | besl);
 
 	/*
 	 * The Superspeed USB Capability descriptor shall be implemented by all
@@ -650,17 +675,6 @@ static int bos_desc(struct usb_composite_dev *cdev)
 						      USB_HIGH_SPEED_OPERATION |
 						      USB_5GBPS_OPERATION);
 		ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
-
-		/* Get Controller configuration */
-		if (cdev->gadget->ops->get_config_params) {
-			cdev->gadget->ops->get_config_params(cdev->gadget,
-				&dcd_config_params);
-		} else {
-			dcd_config_params.bU1devExitLat =
-				USB_DEFAULT_U1_DEV_EXIT_LAT;
-			dcd_config_params.bU2DevExitLat =
-				cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
-		}
 		ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
 		ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
 	}
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index db3628be38c0..90b134d5dca9 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -65,14 +65,16 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
 void ast_vhub_nuke(struct ast_vhub_ep *ep, int status)
 {
 	struct ast_vhub_req *req;
-
-	EPDBG(ep, "Nuking\n");
+	int count = 0;
 
 	/* Beware, lock will be dropped & req-acquired by done() */
 	while (!list_empty(&ep->queue)) {
 		req = list_first_entry(&ep->queue, struct ast_vhub_req, queue);
 		ast_vhub_done(ep, req, status);
+		count++;
 	}
+	if (count)
+		EPDBG(ep, "Nuked %d request(s)\n", count);
 }
 
 struct usb_request *ast_vhub_alloc_request(struct usb_ep *u_ep,
@@ -348,7 +350,6 @@ static int ast_vhub_probe(struct platform_device *pdev)
 	/* Find interrupt and install handler */
 	vhub->irq = platform_get_irq(pdev, 0);
 	if (vhub->irq < 0) {
-		dev_err(&pdev->dev, "Failed to get interrupt\n");
 		rc = vhub->irq;
 		goto err;
 	}
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index 6b1b16b17d7d..4008e7a51188 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -50,11 +50,14 @@ void ast_vhub_dev_irq(struct ast_vhub_dev *d)
 
 static void ast_vhub_dev_enable(struct ast_vhub_dev *d)
 {
-	u32 reg, hmsk;
+	u32 reg, hmsk, i;
 
 	if (d->enabled)
 		return;
 
+	/* Cleanup EP0 state */
+	ast_vhub_reset_ep0(d);
+
 	/* Enable device and its EP0 interrupts */
 	reg = VHUB_DEV_EN_ENABLE_PORT |
 		VHUB_DEV_EN_EP0_IN_ACK_IRQEN |
@@ -73,6 +76,19 @@ static void ast_vhub_dev_enable(struct ast_vhub_dev *d)
 	/* Set EP0 DMA buffer address */
 	writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA);
 
+	/* Clear stall on all EPs */
+	for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {
+		struct ast_vhub_ep *ep = d->epns[i];
+
+		if (ep && (ep->epn.stalled || ep->epn.wedged)) {
+			ep->epn.stalled = false;
+			ep->epn.wedged = false;
+			ast_vhub_update_epn_stall(ep);
+		}
+	}
+
+	/* Additional cleanups */
+	d->wakeup_en = false;
 	d->enabled = true;
 }
 
@@ -93,7 +109,6 @@ static void ast_vhub_dev_disable(struct ast_vhub_dev *d)
 	writel(0, d->regs + AST_VHUB_DEV_EN_CTRL);
 	d->gadget.speed = USB_SPEED_UNKNOWN;
 	d->enabled = false;
-	d->suspended = false;
 }
 
 static int ast_vhub_dev_feature(struct ast_vhub_dev *d,
@@ -201,14 +216,19 @@ int ast_vhub_std_dev_request(struct ast_vhub_ep *ep,
 	u16 wValue, wIndex;
 
 	/* No driver, we shouldn't be enabled ... */
-	if (!d->driver || !d->enabled || d->suspended) {
+	if (!d->driver || !d->enabled) {
 		EPDBG(ep,
-		      "Device is wrong state driver=%p enabled=%d"
-		      " suspended=%d\n",
-		      d->driver, d->enabled, d->suspended);
+		      "Device is wrong state driver=%p enabled=%d\n",
+		      d->driver, d->enabled);
 		return std_req_stall;
 	}
 
+	/*
+	 * Note: we used to reject/stall requests while suspended,
+	 * we don't do that anymore as we seem to have cases of
+	 * mass storage getting very upset.
+	 */
+
 	/* First packet, grab speed */
 	if (d->gadget.speed == USB_SPEED_UNKNOWN) {
 		d->gadget.speed = ep->vhub->speed;
@@ -449,8 +469,7 @@ static const struct usb_gadget_ops ast_vhub_udc_ops = {
 
 void ast_vhub_dev_suspend(struct ast_vhub_dev *d)
 {
-	d->suspended = true;
-	if (d->driver) {
+	if (d->driver && d->driver->suspend) {
 		spin_unlock(&d->vhub->lock);
 		d->driver->suspend(&d->gadget);
 		spin_lock(&d->vhub->lock);
@@ -459,8 +478,7 @@ void ast_vhub_dev_suspend(struct ast_vhub_dev *d)
 
 void ast_vhub_dev_resume(struct ast_vhub_dev *d)
 {
-	d->suspended = false;
-	if (d->driver) {
+	if (d->driver && d->driver->resume) {
 		spin_unlock(&d->vhub->lock);
 		d->driver->resume(&d->gadget);
 		spin_lock(&d->vhub->lock);
@@ -469,46 +487,28 @@ void ast_vhub_dev_resume(struct ast_vhub_dev *d)
 
 void ast_vhub_dev_reset(struct ast_vhub_dev *d)
 {
-	/*
-	 * If speed is not set, we enable the port. If it is,
-	 * send reset to the gadget and reset "speed".
-	 *
-	 * Speed is an indication that we have got the first
-	 * setup packet to the device.
-	 */
-	if (d->gadget.speed == USB_SPEED_UNKNOWN && !d->enabled) {
-		DDBG(d, "Reset at unknown speed of disabled device, enabling...\n");
-		ast_vhub_dev_enable(d);
-		d->suspended = false;
+	/* No driver, just disable the device and return */
+	if (!d->driver) {
+		ast_vhub_dev_disable(d);
+		return;
 	}
-	if (d->gadget.speed != USB_SPEED_UNKNOWN && d->driver) {
-		unsigned int i;
 
-		DDBG(d, "Reset at known speed of bound device, resetting...\n");
+	/* If the port isn't enabled, just enable it */
+	if (!d->enabled) {
+		DDBG(d, "Reset of disabled device, enabling...\n");
+		ast_vhub_dev_enable(d);
+	} else {
+		DDBG(d, "Reset of enabled device, resetting...\n");
 		spin_unlock(&d->vhub->lock);
-		d->driver->reset(&d->gadget);
+		usb_gadget_udc_reset(&d->gadget, d->driver);
 		spin_lock(&d->vhub->lock);
 
 		/*
-		 * Disable/re-enable HW, this will clear the address
+		 * Disable and maybe re-enable HW, this will clear the address
 		 * and speed setting.
 		 */
 		ast_vhub_dev_disable(d);
 		ast_vhub_dev_enable(d);
-
-		/* Clear stall on all EPs */
-		for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {
-			struct ast_vhub_ep *ep = d->epns[i];
-
-			if (ep && ep->epn.stalled) {
-				ep->epn.stalled = false;
-				ast_vhub_update_epn_stall(ep);
-			}
-		}
-
-		/* Additional cleanups */
-		d->wakeup_en = false;
-		d->suspended = false;
 	}
 }
 
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
index e2927fb083cf..022b777b85f8 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
@@ -105,18 +105,20 @@ void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep)
 	       (crq.bRequestType & USB_DIR_IN) ? "in" : "out",
 	       ep->ep0.state);
 
-	/* Check our state, cancel pending requests if needed */
-	if (ep->ep0.state != ep0_state_token) {
+	/*
+	 * Check our state, cancel pending requests if needed
+	 *
+	 * Note: Under some circumstances, we can get a new setup
+	 * packet while waiting for the stall ack, just accept it.
+	 *
+	 * In any case, a SETUP packet in wrong state should have
+	 * reset the HW state machine, so let's just log, nuke
+	 * requests, move on.
+	 */
+	if (ep->ep0.state != ep0_state_token &&
+	    ep->ep0.state != ep0_state_stall) {
 		EPDBG(ep, "wrong state\n");
 		ast_vhub_nuke(ep, -EIO);
-
-		/*
-		 * Accept the packet regardless, this seems to happen
-		 * when stalling a SETUP packet that has an OUT data
-		 * phase.
-		 */
-		ast_vhub_nuke(ep, 0);
-		goto stall;
 	}
 
 	/* Calculate next state for EP0 */
@@ -165,7 +167,7 @@ void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep)
  stall:
 	EPDBG(ep, "stalling\n");
 	writel(VHUB_EP0_CTRL_STALL, ep->ep0.ctlstat);
-	ep->ep0.state = ep0_state_status;
+	ep->ep0.state = ep0_state_stall;
 	ep->ep0.dir_in = false;
 	return;
 
@@ -299,8 +301,8 @@ void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack)
 		if ((ep->ep0.dir_in && (stat & VHUB_EP0_TX_BUFF_RDY)) ||
 		    (!ep->ep0.dir_in && (stat & VHUB_EP0_RX_BUFF_RDY)) ||
 		    (ep->ep0.dir_in != in_ack)) {
+			/* In that case, ignore interrupt */
 			dev_warn(dev, "irq state mismatch");
-			stall = true;
 			break;
 		}
 		/*
@@ -335,12 +337,22 @@ void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack)
 			dev_warn(dev, "status direction mismatch\n");
 			stall = true;
 		}
+		break;
+	case ep0_state_stall:
+		/*
+		 * There shouldn't be any request left, but nuke just in case
+		 * otherwise the stale request will block subsequent ones
+		 */
+		ast_vhub_nuke(ep, -EIO);
+		break;
 	}
 
-	/* Reset to token state */
-	ep->ep0.state = ep0_state_token;
-	if (stall)
+	/* Reset to token state or stall */
+	if (stall) {
 		writel(VHUB_EP0_CTRL_STALL, ep->ep0.ctlstat);
+		ep->ep0.state = ep0_state_stall;
+	} else
+		ep->ep0.state = ep0_state_token;
 }
 
 static int ast_vhub_ep0_queue(struct usb_ep* u_ep, struct usb_request *u_req,
@@ -367,7 +379,7 @@ static int ast_vhub_ep0_queue(struct usb_ep* u_ep, struct usb_request *u_req,
 		return -EINVAL;
 
 	/* Disabled device */
-	if (ep->dev && (!ep->dev->enabled || ep->dev->suspended))
+	if (ep->dev && !ep->dev->enabled)
 		return -ESHUTDOWN;
 
 	/* Data, no buffer and not internal ? */
@@ -390,8 +402,12 @@ static int ast_vhub_ep0_queue(struct usb_ep* u_ep, struct usb_request *u_req,
 	spin_lock_irqsave(&vhub->lock, flags);
 
 	/* EP0 can only support a single request at a time */
-	if (!list_empty(&ep->queue) || ep->ep0.state == ep0_state_token) {
+	if (!list_empty(&ep->queue) ||
+	    ep->ep0.state == ep0_state_token ||
+	    ep->ep0.state == ep0_state_stall) {
 		dev_warn(dev, "EP0: Request in wrong state\n");
+	        EPVDBG(ep, "EP0: list_empty=%d state=%d\n",
+		       list_empty(&ep->queue), ep->ep0.state);
 		spin_unlock_irqrestore(&vhub->lock, flags);
 		return -EBUSY;
 	}
@@ -459,6 +475,15 @@ static const struct usb_ep_ops ast_vhub_ep0_ops = {
 	.free_request	= ast_vhub_free_request,
 };
 
+void ast_vhub_reset_ep0(struct ast_vhub_dev *dev)
+{
+	struct ast_vhub_ep *ep = &dev->ep0;
+
+	ast_vhub_nuke(ep, -EIO);
+	ep->ep0.state = ep0_state_token;
+}
+
+
 void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep,
 		       struct ast_vhub_dev *dev)
 {
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 35941dc125f9..7475c74aa5c5 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -352,7 +352,7 @@ static int ast_vhub_epn_queue(struct usb_ep* u_ep, struct usb_request *u_req,
 
 	/* Endpoint enabled ? */
 	if (!ep->epn.enabled || !u_ep->desc || !ep->dev || !ep->d_idx ||
-	    !ep->dev->enabled || ep->dev->suspended) {
+	    !ep->dev->enabled) {
 		EPDBG(ep, "Enqueuing request on wrong or disabled EP\n");
 		return -ESHUTDOWN;
 	}
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index 7c040f56100e..19b3517e04c0 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -449,8 +449,15 @@ static void ast_vhub_change_port_stat(struct ast_vhub *vhub,
 		       USB_PORT_STAT_C_OVERCURRENT |
 		       USB_PORT_STAT_C_RESET |
 		       USB_PORT_STAT_C_L1;
-		p->change |= chg;
 
+		/*
+		 * We only set USB_PORT_STAT_C_ENABLE if we are disabling
+		 * the port as per USB spec, otherwise MacOS gets upset
+		 */
+		if (p->status & USB_PORT_STAT_ENABLE)
+			chg &= ~USB_PORT_STAT_C_ENABLE;
+
+		p->change = chg;
 		ast_vhub_update_hub_ep1(vhub, port);
 	}
 }
@@ -723,6 +730,12 @@ enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep,
 	case ClearPortFeature:
 		EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
 		return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue);
+	case ClearTTBuffer:
+	case ResetTT:
+	case StopTT:
+		return std_req_complete;
+	case GetTTState:
+		return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
 	default:
 		EPDBG(ep, "Unknown class request\n");
 	}
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
index 4ed03d33a5a9..761919e220d3 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
+++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
@@ -257,6 +257,7 @@ enum ep0_state {
 	ep0_state_token,
 	ep0_state_data,
 	ep0_state_status,
+	ep0_state_stall,
 };
 
 /*
@@ -353,7 +354,6 @@ struct ast_vhub_dev {
 	struct usb_gadget_driver	*driver;
 	bool				registered : 1;
 	bool				wakeup_en : 1;
-	bool				suspended : 1;
 	bool				enabled : 1;
 
 	/* Endpoint structures */
@@ -507,6 +507,7 @@ void ast_vhub_init_hw(struct ast_vhub *vhub);
 /* ep0.c */
 void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack);
 void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep);
+void ast_vhub_reset_ep0(struct ast_vhub_dev *dev);
 void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep,
 		       struct ast_vhub_dev *dev);
 int ast_vhub_reply(struct ast_vhub_ep *ep, char *ptr, int len);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 503d275bc4c4..86ffc8307864 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -327,6 +327,7 @@ static int usba_config_fifo_table(struct usba_udc *udc)
 	switch (fifo_mode) {
 	default:
 		fifo_mode = 0;
+		/* fall through */
 	case 0:
 		udc->fifo_cfg = NULL;
 		n = 0;
diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c
index c1fcc77403ea..97b16463f3ef 100644
--- a/drivers/usb/gadget/udc/bcm63xx_udc.c
+++ b/drivers/usb/gadget/udc/bcm63xx_udc.c
@@ -2328,10 +2328,8 @@ static int bcm63xx_udc_probe(struct platform_device *pdev)
 
 	/* IRQ resource #0: control interrupt (VBUS, speed, etc.) */
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "missing IRQ resource #0\n");
+	if (irq < 0)
 		goto out_uninit;
-	}
 	if (devm_request_irq(dev, irq, &bcm63xx_udc_ctrl_isr, 0,
 			     dev_name(dev), udc) < 0)
 		goto report_request_failure;
@@ -2339,10 +2337,8 @@ static int bcm63xx_udc_probe(struct platform_device *pdev)
 	/* IRQ resources #1-6: data interrupts for IUDMA channels 0-5 */
 	for (i = 0; i < BCM63XX_NUM_IUDMA; i++) {
 		irq = platform_get_irq(pdev, i + 1);
-		if (irq < 0) {
-			dev_err(dev, "missing IRQ resource #%d\n", i + 1);
+		if (irq < 0)
 			goto out_uninit;
-		}
 		if (devm_request_irq(dev, irq, &bcm63xx_udc_data_isr, 0,
 				     dev_name(dev), &udc->iudma[i]) < 0)
 			goto report_request_failure;
diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index ccbd1d34eb2a..cc4a16e253ac 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -515,10 +515,8 @@ static int bdc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "platform_get_irq failed:%d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 	spin_lock_init(&bdc->lock);
 	platform_set_drvdata(pdev, bdc);
 	bdc->irq = irq;
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 7cf34beb50df..92af8dc98c3d 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1143,7 +1143,7 @@ static int check_pending_gadget_drivers(struct usb_udc *udc)
 						dev_name(&udc->dev)) == 0) {
 			ret = udc_bind_to_driver(udc, driver);
 			if (ret != -EPROBE_DEFER)
-				list_del(&driver->pending);
+				list_del_init(&driver->pending);
 			break;
 		}
 
diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index 729e60e49564..7a0e9a58c2d8 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -2134,19 +2134,15 @@ static int gr_probe(struct platform_device *pdev)
 		return PTR_ERR(regs);
 
 	dev->irq = platform_get_irq(pdev, 0);
-	if (dev->irq <= 0) {
-		dev_err(dev->dev, "No irq found\n");
+	if (dev->irq <= 0)
 		return -ENODEV;
-	}
 
 	/* Some core configurations has separate irqs for IN and OUT events */
 	dev->irqi = platform_get_irq(pdev, 1);
 	if (dev->irqi > 0) {
 		dev->irqo = platform_get_irq(pdev, 2);
-		if (dev->irqo <= 0) {
-			dev_err(dev->dev, "Found irqi but not irqo\n");
+		if (dev->irqo <= 0)
 			return -ENODEV;
-		}
 	} else {
 		dev->irqi = 0;
 	}
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index c65aed3e84c7..b3e073fb88c6 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -741,7 +741,6 @@ static inline void udc_protocol_cmd_data_w(struct lpc32xx_udc *udc, u32 cmd,
  * response data */
 static u32 udc_protocol_cmd_r(struct lpc32xx_udc *udc, u32 cmd)
 {
-	u32 tmp;
 	int to = 1000;
 
 	/* Write a command and read data from the protocol engine */
@@ -751,7 +750,6 @@ static u32 udc_protocol_cmd_r(struct lpc32xx_udc *udc, u32 cmd)
 	/* Write command code */
 	udc_protocol_cmd_w(udc, cmd);
 
-	tmp = readl(USBD_DEVINTST(udc->udp_baseaddr));
 	while ((!(readl(USBD_DEVINTST(udc->udp_baseaddr)) & USBD_CDFULL))
 	       && (to > 0))
 		to--;
@@ -1991,7 +1989,7 @@ void udc_handle_eps(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep)
 /* DMA end of transfer completion */
 static void udc_handle_dma_ep(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep)
 {
-	u32 status, epstatus;
+	u32 status;
 	struct lpc32xx_request *req;
 	struct lpc32xx_usbd_dd_gad *dd;
 
@@ -2085,7 +2083,7 @@ static void udc_handle_dma_ep(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep)
 		if (udc_clearep_getsts(udc, ep->hwep_num) & EP_SEL_F) {
 			udc_clearep_getsts(udc, ep->hwep_num);
 			uda_enable_hwepint(udc, ep->hwep_num);
-			epstatus = udc_clearep_getsts(udc, ep->hwep_num);
+			udc_clearep_getsts(udc, ep->hwep_num);
 
 			/* Let the EP interrupt handle the ZLP */
 			return;
@@ -2197,7 +2195,7 @@ static void udc_handle_ep0_setup(struct lpc32xx_udc *udc)
 	struct lpc32xx_ep *ep, *ep0 = &udc->ep[0];
 	struct usb_ctrlrequest ctrlpkt;
 	int i, bytes;
-	u16 wIndex, wValue, wLength, reqtype, req, tmp;
+	u16 wIndex, wValue, reqtype, req, tmp;
 
 	/* Nuke previous transfers */
 	nuke(ep0, -EPROTO);
@@ -2213,7 +2211,6 @@ static void udc_handle_ep0_setup(struct lpc32xx_udc *udc)
 	/* Native endianness */
 	wIndex = le16_to_cpu(ctrlpkt.wIndex);
 	wValue = le16_to_cpu(ctrlpkt.wValue);
-	wLength = le16_to_cpu(ctrlpkt.wLength);
 	reqtype = le16_to_cpu(ctrlpkt.bRequestType);
 
 	/* Set direction of EP0 */
@@ -3060,11 +3057,8 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 	/* Get IRQs */
 	for (i = 0; i < 4; i++) {
 		udc->udp_irq[i] = platform_get_irq(pdev, i);
-		if (udc->udp_irq[i] < 0) {
-			dev_err(udc->dev,
-				"irq resource %d not available!\n", i);
+		if (udc->udp_irq[i] < 0)
 			return udc->udp_irq[i];
-		}
 	}
 
 	udc->udp_baseaddr = devm_ioremap_resource(dev, res);
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index b6bbe2e448ba..51efee21915f 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -2244,30 +2244,40 @@ static void usb_reinit_338x(struct net2280 *dev)
 	}
 
 	/* Hardware Defect and Workaround */
-	val = readl(&dev->ll_lfps_regs->ll_lfps_5);
+	val = readl(&dev->llregs->ll_lfps_5);
 	val &= ~(0xf << TIMER_LFPS_6US);
 	val |= 0x5 << TIMER_LFPS_6US;
-	writel(val, &dev->ll_lfps_regs->ll_lfps_5);
+	writel(val, &dev->llregs->ll_lfps_5);
 
-	val = readl(&dev->ll_lfps_regs->ll_lfps_6);
+	val = readl(&dev->llregs->ll_lfps_6);
 	val &= ~(0xffff << TIMER_LFPS_80US);
 	val |= 0x0100 << TIMER_LFPS_80US;
-	writel(val, &dev->ll_lfps_regs->ll_lfps_6);
+	writel(val, &dev->llregs->ll_lfps_6);
 
 	/*
 	 * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB
 	 * Hot Reset Exit Handshake may Fail in Specific Case using
 	 * Default Register Settings. Workaround for Enumeration test.
 	 */
-	val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2);
+	val = readl(&dev->llregs->ll_tsn_counters_2);
 	val &= ~(0x1f << HOT_TX_NORESET_TS2);
 	val |= 0x10 << HOT_TX_NORESET_TS2;
-	writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2);
+	writel(val, &dev->llregs->ll_tsn_counters_2);
 
-	val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3);
+	val = readl(&dev->llregs->ll_tsn_counters_3);
 	val &= ~(0x1f << HOT_RX_RESET_TS2);
 	val |= 0x3 << HOT_RX_RESET_TS2;
-	writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3);
+	writel(val, &dev->llregs->ll_tsn_counters_3);
+
+	/*
+	 * AB errata. Errata 11. Workaround for Default Duration of LFPS
+	 * Handshake Signaling for Device-Initiated U1 Exit is too short.
+	 * Without this, various enumeration failures observed with
+	 * modern superspeed hosts.
+	 */
+	val = readl(&dev->llregs->ll_lfps_timers_2);
+	writel((val & 0xffff0000) | LFPS_TIMERS_2_WORKAROUND_VALUE,
+	       &dev->llregs->ll_lfps_timers_2);
 
 	/*
 	 * Set Recovery Idle to Recover bit:
@@ -2276,10 +2286,10 @@ static void usb_reinit_338x(struct net2280 *dev)
 	 * - It is safe to set for all connection speeds; all chip revisions.
 	 * - R-M-W to leave other bits undisturbed.
 	 * - Reference PLX TT-7372
-	 */
-	val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit);
+	*/
+	val = readl(&dev->llregs->ll_tsn_chicken_bit);
 	val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW);
-	writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit);
+	writel(val, &dev->llregs->ll_tsn_chicken_bit);
 
 	INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
 
@@ -3669,12 +3679,6 @@ static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 							(base + 0x00b4);
 		dev->llregs = (struct usb338x_ll_regs __iomem *)
 							(base + 0x0700);
-		dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *)
-							(base + 0x0748);
-		dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *)
-							(base + 0x077c);
-		dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *)
-							(base + 0x079c);
 		dev->plregs = (struct usb338x_pl_regs __iomem *)
 							(base + 0x0800);
 		usbstat = readl(&dev->usb->usbstat);
diff --git a/drivers/usb/gadget/udc/net2280.h b/drivers/usb/gadget/udc/net2280.h
index b65a797544d7..85d3ca1698ba 100644
--- a/drivers/usb/gadget/udc/net2280.h
+++ b/drivers/usb/gadget/udc/net2280.h
@@ -178,9 +178,6 @@ struct net2280 {
 	struct net2280_dep_regs		__iomem *dep;
 	struct net2280_ep_regs		__iomem *epregs;
 	struct usb338x_ll_regs		__iomem *llregs;
-	struct usb338x_ll_lfps_regs	__iomem *ll_lfps_regs;
-	struct usb338x_ll_tsn_regs	__iomem *ll_tsn_regs;
-	struct usb338x_ll_chi_regs	__iomem *ll_chicken_reg;
 	struct usb338x_pl_regs		__iomem *plregs;
 
 	struct dma_pool			*requests;
diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index cded51f36fc1..265dab2bbfac 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -3046,8 +3046,7 @@ static void pch_udc_remove(struct pci_dev *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int pch_udc_suspend(struct device *d)
 {
-	struct pci_dev *pdev = to_pci_dev(d);
-	struct pch_udc_dev *dev = pci_get_drvdata(pdev);
+	struct pch_udc_dev *dev = dev_get_drvdata(d);
 
 	pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK);
 	pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 1f4c3fbd1df8..e098f16c01cb 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2744,10 +2744,8 @@ static int renesas_usb3_probe(struct platform_device *pdev)
 		priv = of_device_get_match_data(&pdev->dev);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
 	if (!usb3)
diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c
index 31c7c5587cf9..858993c73442 100644
--- a/drivers/usb/gadget/udc/s3c-hsudc.c
+++ b/drivers/usb/gadget/udc/s3c-hsudc.c
@@ -1311,10 +1311,8 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
 	s3c_hsudc_setup_ep(hsudc);
 
 	ret = platform_get_irq(pdev, 0);
-	if (ret < 0) {
-		dev_err(dev, "unable to obtain IRQ number\n");
+	if (ret < 0)
 		goto err_res;
-	}
 	hsudc->irq = ret;
 
 	ret = devm_request_irq(&pdev->dev, hsudc->irq, s3c_hsudc_irq, 0,
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index af3e63316ace..f82208fbc249 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -312,6 +312,7 @@ static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 	switch (idx) {
 	default:
 		idx = 0;
+		/* fall through */
 	case 0:
 		fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 		break;
@@ -416,6 +417,7 @@ static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 	switch (idx) {
 	default:
 		idx = 0;
+		/* fall through */
 	case 0:
 		fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 		break;
diff --git a/drivers/usb/gadget/udc/udc-xilinx.c b/drivers/usb/gadget/udc/udc-xilinx.c
index b1f4104d1283..29d8e5f8bb58 100644
--- a/drivers/usb/gadget/udc/udc-xilinx.c
+++ b/drivers/usb/gadget/udc/udc-xilinx.c
@@ -2074,10 +2074,8 @@ static int xudc_probe(struct platform_device *pdev)
 		return PTR_ERR(udc->addr);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "unable to get irq\n");
+	if (irq < 0)
 		return irq;
-	}
 	ret = devm_request_irq(&pdev->dev, irq, xudc_irq, 0,
 			       dev_name(&pdev->dev), udc);
 	if (ret < 0) {
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 73d233d3bf4d..79b2e79dddd0 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -287,12 +287,6 @@ config USB_EHCI_MV
 	  Dova, Armada 370 and Armada XP. See "Support for Marvell EBU
 	  on-chip EHCI USB controller" for those.
 
-config USB_W90X900_EHCI
-	tristate "W90X900(W90P910) EHCI support"
-	depends on ARCH_W90X900
-	---help---
-		Enables support for the W90X900 USB controller
-
 config USB_CNS3XXX_EHCI
 	bool "Cavium CNS3XXX EHCI Module (DEPRECATED)"
 	depends on ARCH_CNS3XXX
@@ -718,32 +712,6 @@ config USB_RENESAS_USBHS_HCD
 	  To compile this driver as a module, choose M here: the
 	  module will be called renesas-usbhs.
 
-config USB_WHCI_HCD
-	tristate "Wireless USB Host Controller Interface (WHCI) driver"
-	depends on USB_PCI && USB && UWB
-	select USB_WUSB
-	select UWB_WHCI
-	help
-	  A driver for PCI-based Wireless USB Host Controllers that are
-	  compliant with the WHCI specification.
-
-	  To compile this driver a module, choose M here: the module
-	  will be called "whci-hcd".
-
-config USB_HWA_HCD
-	tristate "Host Wire Adapter (HWA) driver"
-	depends on USB && UWB
-	select USB_WUSB
-	select UWB_HWA
-	help
-	  This driver enables you to connect Wireless USB devices to
-	  your system using a Host Wire Adaptor USB dongle. This is an
-	  UWB Radio Controller and WUSB Host Controller connected to
-	  your machine via USB (specified in WUSB1.0).
-
-	  To compile this driver a module, choose M here: the module
-	  will be called "hwa-hc".
-
 config USB_IMX21_HCD
        tristate "i.MX21 HCD support"
        depends on ARM && ARCH_MXC
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 84514f71ae44..b191361257cc 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -35,8 +35,6 @@ ifneq ($(CONFIG_DEBUG_FS),)
 	xhci-hcd-y		+= xhci-debugfs.o
 endif
 
-obj-$(CONFIG_USB_WHCI_HCD)	+= whci/
-
 obj-$(CONFIG_USB_PCI)	+= pci-quirks.o
 
 obj-$(CONFIG_USB_EHCI_HCD)	+= ehci-hcd.o
@@ -51,7 +49,6 @@ obj-$(CONFIG_USB_EHCI_HCD_STI)	+= ehci-st.o
 obj-$(CONFIG_USB_EHCI_EXYNOS)	+= ehci-exynos.o
 obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
 obj-$(CONFIG_USB_EHCI_TEGRA)	+= ehci-tegra.o
-obj-$(CONFIG_USB_W90X900_EHCI)	+= ehci-w90x900.o
 
 obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
 obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
@@ -82,7 +79,6 @@ obj-$(CONFIG_USB_SL811_HCD)	+= sl811-hcd.o
 obj-$(CONFIG_USB_SL811_CS)	+= sl811_cs.o
 obj-$(CONFIG_USB_U132_HCD)	+= u132-hcd.o
 obj-$(CONFIG_USB_R8A66597_HCD)	+= r8a66597-hcd.o
-obj-$(CONFIG_USB_HWA_HCD)	+= hwa-hc.o
 obj-$(CONFIG_USB_IMX21_HCD)	+= imx21-hcd.o
 obj-$(CONFIG_USB_FSL_USB2)	+= fsl-mph-dr-of.o
 obj-$(CONFIG_USB_EHCI_FSL)	+= fsl-mph-dr-of.o
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 3ba140ceaf52..e893467d659c 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -100,9 +100,6 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
-		dev_err(&pdev->dev,
-			"Found HC with no IRQ. Check %s setup!\n",
-			dev_name(&pdev->dev));
 		retval = -ENODEV;
 		goto fail_create_hcd;
 	}
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 3a29a1a8519c..01debfd03d4a 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -41,6 +41,7 @@ struct exynos_ehci_hcd {
 	struct clk *clk;
 	struct device_node *of_node;
 	struct phy *phy[PHY_NUMBER];
+	bool legacy_phy;
 };
 
 #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
@@ -50,10 +51,22 @@ static int exynos_ehci_get_phy(struct device *dev,
 {
 	struct device_node *child;
 	struct phy *phy;
-	int phy_number;
+	int phy_number, num_phys;
 	int ret;
 
 	/* Get PHYs for the controller */
+	num_phys = of_count_phandle_with_args(dev->of_node, "phys",
+					      "#phy-cells");
+	for (phy_number = 0; phy_number < num_phys; phy_number++) {
+		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);
+		if (IS_ERR(phy))
+			return PTR_ERR(phy);
+		exynos_ehci->phy[phy_number] = phy;
+	}
+	if (num_phys > 0)
+		return 0;
+
+	/* Get PHYs using legacy bindings */
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
 		if (ret) {
@@ -84,6 +97,7 @@ static int exynos_ehci_get_phy(struct device *dev,
 		}
 	}
 
+	exynos_ehci->legacy_phy = true;
 	return 0;
 }
 
@@ -205,11 +219,12 @@ static int exynos_ehci_probe(struct platform_device *pdev)
 	ehci->caps = hcd->regs;
 
 	/*
-	 * Workaround: reset of_node pointer to avoid conflict between Exynos
-	 * EHCI port subnodes and generic USB device bindings
+	 * Workaround: reset of_node pointer to avoid conflict between legacy
+	 * Exynos EHCI port subnodes and generic USB device bindings
 	 */
 	exynos_ehci->of_node = pdev->dev.of_node;
-	pdev->dev.of_node = NULL;
+	if (exynos_ehci->legacy_phy)
+		pdev->dev.of_node = NULL;
 
 	/* DMA burst Enable */
 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c
index 656b8c08efc8..a2c3b4ec8a8b 100644
--- a/drivers/usb/host/ehci-grlib.c
+++ b/drivers/usb/host/ehci-grlib.c
@@ -30,7 +30,7 @@ static const struct hc_driver ehci_grlib_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 9da7e22848c9..cf2b7ae93b7e 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1193,7 +1193,7 @@ static const struct hc_driver ehci_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			ehci_irq,
-	.flags =		HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 7d20296cbe9f..fc125b3d06e7 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -115,10 +115,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "EHCI irq failed: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	res =  platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(dev, res);
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 790acf3633e8..a319b1df3011 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -223,9 +223,6 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
-		dev_err(&pdev->dev,
-			"Found HC with no IRQ. Check %s setup!\n",
-			dev_name(&pdev->dev));
 		err = -ENODEV;
 		goto err;
 	}
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 4c306fb6b069..769749ca5961 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -145,10 +145,8 @@ static int ehci_platform_probe(struct platform_device *dev)
 	}
 
 	irq = platform_get_irq(dev, 0);
-	if (irq < 0) {
-		dev_err(&dev->dev, "no irq provided");
+	if (irq < 0)
 		return irq;
-	}
 
 	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
 			     dev_name(&dev->dev));
diff --git a/drivers/usb/host/ehci-pmcmsp.c b/drivers/usb/host/ehci-pmcmsp.c
index 46e160370d6e..a2b610dbedfc 100644
--- a/drivers/usb/host/ehci-pmcmsp.c
+++ b/drivers/usb/host/ehci-pmcmsp.c
@@ -250,7 +250,7 @@ static const struct hc_driver ehci_msp_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			ehci_irq,
-	.flags =		HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 576f7d79ad4e..6bbaee74f7e7 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -31,7 +31,7 @@ static const struct hc_driver ehci_ppc_of_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c
index 454d8c624a3f..fb52133c3557 100644
--- a/drivers/usb/host/ehci-ps3.c
+++ b/drivers/usb/host/ehci-ps3.c
@@ -59,7 +59,7 @@ static const struct hc_driver ps3_ehci_hc_driver = {
 	.product_desc		= "PS3 EHCI Host Controller",
 	.hcd_priv_size		= sizeof(struct ehci_hcd),
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 	.reset			= ps3_ehci_hc_reset,
 	.start			= ehci_run,
 	.stop			= ehci_stop,
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
index a9ee767952c1..2afde14dc425 100644
--- a/drivers/usb/host/ehci-sh.c
+++ b/drivers/usb/host/ehci-sh.c
@@ -33,7 +33,7 @@ static const struct hc_driver ehci_sh_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq				= ehci_irq,
-	.flags				= HCD_USB2 | HCD_MEMORY | HCD_BH,
+	.flags				= HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
@@ -85,9 +85,6 @@ static int ehci_hcd_sh_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
-		dev_err(&pdev->dev,
-			"Found HC with no IRQ. Check %s setup!\n",
-			dev_name(&pdev->dev));
 		ret = -ENODEV;
 		goto fail_create_hcd;
 	}
diff --git a/drivers/usb/host/ehci-st.c b/drivers/usb/host/ehci-st.c
index ccb4e611001d..f74433aac948 100644
--- a/drivers/usb/host/ehci-st.c
+++ b/drivers/usb/host/ehci-st.c
@@ -158,10 +158,8 @@ static int st_ehci_platform_probe(struct platform_device *dev)
 		return -ENODEV;
 
 	irq = platform_get_irq(dev, 0);
-	if (irq < 0) {
-		dev_err(&dev->dev, "no irq provided");
+	if (irq < 0)
 		return irq;
-	}
 	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	if (!res_mem) {
 		dev_err(&dev->dev, "no memory resource provided");
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
deleted file mode 100644
index 6d77ace1697b..000000000000
--- a/drivers/usb/host/ehci-w90x900.c
+++ /dev/null
@@ -1,130 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/driver/usb/host/ehci-w90x900.c
- *
- * Copyright (c) 2008 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-
-#include "ehci.h"
-
-/* enable phy0 and phy1 for w90p910 */
-#define	ENPHY		(0x01<<8)
-#define PHY0_CTR	(0xA4)
-#define PHY1_CTR	(0xA8)
-
-#define DRIVER_DESC "EHCI w90x900 driver"
-
-static const char hcd_name[] = "ehci-w90x900 ";
-
-static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
-
-static int ehci_w90x900_probe(struct platform_device *pdev)
-{
-	struct usb_hcd *hcd;
-	struct ehci_hcd *ehci;
-	struct resource *res;
-	int retval = 0, irq;
-	unsigned long val;
-
-	hcd = usb_create_hcd(&ehci_w90x900_hc_driver,
-			&pdev->dev, "w90x900 EHCI");
-	if (!hcd) {
-		retval = -ENOMEM;
-		goto err1;
-	}
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(hcd->regs)) {
-		retval = PTR_ERR(hcd->regs);
-		goto err2;
-	}
-	hcd->rsrc_start = res->start;
-	hcd->rsrc_len = resource_size(res);
-
-	ehci = hcd_to_ehci(hcd);
-	ehci->caps = hcd->regs;
-	ehci->regs = hcd->regs +
-		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
-
-	/* enable PHY 0,1,the regs only apply to w90p910
-	 *  0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
-	 *  w90p910 IC relative to ehci->regs.
-	 */
-	val = __raw_readl(ehci->regs+PHY0_CTR);
-	val |= ENPHY;
-	__raw_writel(val, ehci->regs+PHY0_CTR);
-
-	val = __raw_readl(ehci->regs+PHY1_CTR);
-	val |= ENPHY;
-	__raw_writel(val, ehci->regs+PHY1_CTR);
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		retval = irq;
-		goto err2;
-	}
-
-	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
-	if (retval != 0)
-		goto err2;
-
-	device_wakeup_enable(hcd->self.controller);
-	return retval;
-err2:
-	usb_put_hcd(hcd);
-err1:
-	return retval;
-}
-
-static int ehci_w90x900_remove(struct platform_device *pdev)
-{
-	struct usb_hcd *hcd = platform_get_drvdata(pdev);
-
-	usb_remove_hcd(hcd);
-	usb_put_hcd(hcd);
-
-	return 0;
-}
-
-static struct platform_driver ehci_hcd_w90x900_driver = {
-	.probe  = ehci_w90x900_probe,
-	.remove = ehci_w90x900_remove,
-	.driver = {
-		.name = "w90x900-ehci",
-	},
-};
-
-static int __init ehci_w90X900_init(void)
-{
-	if (usb_disabled())
-		return -ENODEV;
-
-	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
-
-	ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
-	return platform_driver_register(&ehci_hcd_w90x900_driver);
-}
-module_init(ehci_w90X900_init);
-
-static void __exit ehci_w90X900_cleanup(void)
-{
-	platform_driver_unregister(&ehci_hcd_w90x900_driver);
-}
-module_exit(ehci_w90X900_cleanup);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_ALIAS("platform:w90p910-ehci");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index d2a27578e440..67a6ee8cb5d8 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -66,7 +66,7 @@ static const struct hc_driver ehci_xilinx_of_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c
index 48fe9e6c2465..04733876c9c6 100644
--- a/drivers/usb/host/fhci-hcd.c
+++ b/drivers/usb/host/fhci-hcd.c
@@ -538,7 +538,7 @@ static const struct hc_driver fhci_driver = {
 
 	/* generic hardware linkage */
 	.irq = fhci_irq,
-	.flags = HCD_USB11 | HCD_MEMORY,
+	.flags = HCD_DMA | HCD_USB11 | HCD_MEMORY,
 
 	/* basic lifecycle operation */
 	.start = fhci_start,
diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index 0dbfa5c10703..9e0c98d6bdb0 100644
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -5508,7 +5508,7 @@ static const struct hc_driver fotg210_fotg210_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq			= fotg210_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
deleted file mode 100644
index 6968b9f2b76b..000000000000
--- a/drivers/usb/host/hwa-hc.c
+++ /dev/null
@@ -1,875 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Host Wire Adapter:
- * Driver glue, HWA-specific functions, bridges to WAHC and WUSBHC
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * The HWA driver is a simple layer that forwards requests to the WAHC
- * (Wire Adater Host Controller) or WUSBHC (Wireless USB Host
- * Controller) layers.
- *
- * Host Wire Adapter is the 'WUSB 1.0 standard' name for Wireless-USB
- * Host Controller that is connected to your system via USB (a USB
- * dongle that implements a USB host...). There is also a Device Wired
- * Adaptor, DWA (Wireless USB hub) that uses the same mechanism for
- * transferring data (it is after all a USB host connected via
- * Wireless USB), we have a common layer called Wire Adapter Host
- * Controller that does all the hard work. The WUSBHC (Wireless USB
- * Host Controller) is the part common to WUSB Host Controllers, the
- * HWA and the PCI-based one, that is implemented following the WHCI
- * spec. All these layers are implemented in ../wusbcore.
- *
- * The main functions are hwahc_op_urb_{en,de}queue(), that pass the
- * job of converting a URB to a Wire Adapter
- *
- * Entry points:
- *
- *   hwahc_driver_*()   Driver initialization, registration and
- *                      teardown.
- *
- *   hwahc_probe()	New device came up, create an instance for
- *                      it [from device enumeration].
- *
- *   hwahc_disconnect()	Remove device instance [from device
- *                      enumeration].
- *
- *   [__]hwahc_op_*()   Host-Wire-Adaptor specific functions for
- *                      starting/stopping/etc (some might be made also
- *                      DWA).
- */
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/workqueue.h>
-#include <linux/wait.h>
-#include <linux/completion.h>
-#include "../wusbcore/wa-hc.h"
-#include "../wusbcore/wusbhc.h"
-
-struct hwahc {
-	struct wusbhc wusbhc;	/* has to be 1st */
-	struct wahc wa;
-};
-
-/*
- * FIXME should be wusbhc
- *
- * NOTE: we need to cache the Cluster ID because later...there is no
- *       way to get it :)
- */
-static int __hwahc_set_cluster_id(struct hwahc *hwahc, u8 cluster_id)
-{
-	int result;
-	struct wusbhc *wusbhc = &hwahc->wusbhc;
-	struct wahc *wa = &hwahc->wa;
-	struct device *dev = &wa->usb_iface->dev;
-
-	result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_SET_CLUSTER_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			cluster_id,
-			wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0)
-		dev_err(dev, "Cannot set WUSB Cluster ID to 0x%02x: %d\n",
-			cluster_id, result);
-	else
-		wusbhc->cluster_id = cluster_id;
-	dev_info(dev, "Wireless USB Cluster ID set to 0x%02x\n", cluster_id);
-	return result;
-}
-
-static int __hwahc_op_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
-{
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-
-	return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_SET_NUM_DNTS,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			interval << 8 | slots,
-			wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-}
-
-/*
- * Reset a WUSB host controller and wait for it to complete doing it.
- *
- * @usb_hcd:	Pointer to WUSB Host Controller instance.
- *
- */
-static int hwahc_op_reset(struct usb_hcd *usb_hcd)
-{
-	int result;
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct device *dev = &hwahc->wa.usb_iface->dev;
-
-	mutex_lock(&wusbhc->mutex);
-	wa_nep_disarm(&hwahc->wa);
-	result = __wa_set_feature(&hwahc->wa, WA_RESET);
-	if (result < 0) {
-		dev_err(dev, "error commanding HC to reset: %d\n", result);
-		goto error_unlock;
-	}
-	result = __wa_wait_status(&hwahc->wa, WA_STATUS_RESETTING, 0);
-	if (result < 0) {
-		dev_err(dev, "error waiting for HC to reset: %d\n", result);
-		goto error_unlock;
-	}
-error_unlock:
-	mutex_unlock(&wusbhc->mutex);
-	return result;
-}
-
-/*
- * FIXME: break this function up
- */
-static int hwahc_op_start(struct usb_hcd *usb_hcd)
-{
-	u8 addr;
-	int result;
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	result = -ENOSPC;
-	mutex_lock(&wusbhc->mutex);
-	addr = wusb_cluster_id_get();
-	if (addr == 0)
-		goto error_cluster_id_get;
-	result = __hwahc_set_cluster_id(hwahc, addr);
-	if (result < 0)
-		goto error_set_cluster_id;
-
-	usb_hcd->uses_new_polling = 1;
-	set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
-	usb_hcd->state = HC_STATE_RUNNING;
-
-	/*
-	 * prevent USB core from suspending the root hub since
-	 * bus_suspend and bus_resume are not yet supported.
-	 */
-	pm_runtime_get_noresume(&usb_hcd->self.root_hub->dev);
-
-	result = 0;
-out:
-	mutex_unlock(&wusbhc->mutex);
-	return result;
-
-error_set_cluster_id:
-	wusb_cluster_id_put(addr);
-error_cluster_id_get:
-	goto out;
-
-}
-
-/*
- * No need to abort pipes, as when this is called, all the children
- * has been disconnected and that has done it [through
- * usb_disable_interface() -> usb_disable_endpoint() ->
- * hwahc_op_ep_disable() - >rpipe_ep_disable()].
- */
-static void hwahc_op_stop(struct usb_hcd *usb_hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-
-	mutex_lock(&wusbhc->mutex);
-	wusb_cluster_id_put(wusbhc->cluster_id);
-	mutex_unlock(&wusbhc->mutex);
-}
-
-static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-
-	/*
-	 * We cannot query the HWA for the WUSB time since that requires sending
-	 * a synchronous URB and this function can be called in_interrupt.
-	 * Instead, query the USB frame number for our parent and use that.
-	 */
-	return usb_get_current_frame_number(wa->usb_dev);
-}
-
-static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
-				gfp_t gfp)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	return wa_urb_enqueue(&hwahc->wa, urb->ep, urb, gfp);
-}
-
-static int hwahc_op_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb,
-				int status)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	return wa_urb_dequeue(&hwahc->wa, urb, status);
-}
-
-/*
- * Release resources allocated for an endpoint
- *
- * If there is an associated rpipe to this endpoint, go ahead and put it.
- */
-static void hwahc_op_endpoint_disable(struct usb_hcd *usb_hcd,
-				      struct usb_host_endpoint *ep)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	rpipe_ep_disable(&hwahc->wa, ep);
-}
-
-static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
-{
-	int result;
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct device *dev = &hwahc->wa.usb_iface->dev;
-
-	result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
-	if (result < 0) {
-		dev_err(dev, "error commanding HC to start: %d\n", result);
-		goto error_stop;
-	}
-	result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
-	if (result < 0) {
-		dev_err(dev, "error waiting for HC to start: %d\n", result);
-		goto error_stop;
-	}
-	result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
-	if (result < 0) {
-		dev_err(dev, "cannot listen to notifications: %d\n", result);
-		goto error_stop;
-	}
-	/*
-	 * If WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS is set,
-	 *  disable transfer notifications.
-	 */
-	if (hwahc->wa.quirks &
-		WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS) {
-		struct usb_host_interface *cur_altsetting =
-			hwahc->wa.usb_iface->cur_altsetting;
-
-		result = usb_control_msg(hwahc->wa.usb_dev,
-				usb_sndctrlpipe(hwahc->wa.usb_dev, 0),
-				WA_REQ_ALEREON_DISABLE_XFER_NOTIFICATIONS,
-				USB_DIR_OUT | USB_TYPE_VENDOR |
-					USB_RECIP_INTERFACE,
-				WA_REQ_ALEREON_FEATURE_SET,
-				cur_altsetting->desc.bInterfaceNumber,
-				NULL, 0,
-				USB_CTRL_SET_TIMEOUT);
-		/*
-		 * If we successfully sent the control message, start DTI here
-		 * because no transfer notifications will be received which is
-		 * where DTI is normally started.
-		 */
-		if (result == 0)
-			result = wa_dti_start(&hwahc->wa);
-		else
-			result = 0;	/* OK.  Continue normally. */
-
-		if (result < 0) {
-			dev_err(dev, "cannot start DTI: %d\n", result);
-			goto error_dti_start;
-		}
-	}
-
-	return result;
-
-error_dti_start:
-	wa_nep_disarm(&hwahc->wa);
-error_stop:
-	__wa_clear_feature(&hwahc->wa, WA_ENABLE);
-	return result;
-}
-
-static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc, int delay)
-{
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-	int ret;
-
-	ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			      WUSB_REQ_CHAN_STOP,
-			      USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			      delay * 1000,
-			      iface_no,
-			      NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (ret == 0)
-		msleep(delay);
-
-	wa_nep_disarm(&hwahc->wa);
-	__wa_stop(&hwahc->wa);
-}
-
-/*
- * Set the UWB MAS allocation for the WUSB cluster
- *
- * @stream_index: stream to use (-1 for cancelling the allocation)
- * @mas: mas bitmap to use
- */
-static int __hwahc_op_bwa_set(struct wusbhc *wusbhc, s8 stream_index,
-			      const struct uwb_mas_bm *mas)
-{
-	int result;
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	struct device *dev = &wa->usb_iface->dev;
-	u8 mas_le[UWB_NUM_MAS/8];
-
-	/* Set the stream index */
-	result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_SET_STREAM_IDX,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			stream_index,
-			wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Cannot set WUSB stream index: %d\n", result);
-		goto out;
-	}
-	uwb_mas_bm_copy_le(mas_le, mas);
-	/* Set the MAS allocation */
-	result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_SET_WUSB_MAS,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			mas_le, 32, USB_CTRL_SET_TIMEOUT);
-	if (result < 0)
-		dev_err(dev, "Cannot set WUSB MAS allocation: %d\n", result);
-out:
-	return result;
-}
-
-/*
- * Add an IE to the host's MMC
- *
- * @interval:    See WUSB1.0[8.5.3.1]
- * @repeat_cnt:  See WUSB1.0[8.5.3.1]
- * @handle:      See WUSB1.0[8.5.3.1]
- * @wuie:        Pointer to the header of the WUSB IE data to add.
- *               MUST BE allocated in a kmalloc buffer (no stack or
- *               vmalloc).
- *
- * NOTE: the format of the WUSB IEs for MMCs are different to the
- *       normal MBOA MAC IEs (IE Id + Length in MBOA MAC vs. Length +
- *       Id in WUSB IEs). Standards...you gotta love'em.
- */
-static int __hwahc_op_mmcie_add(struct wusbhc *wusbhc, u8 interval,
-				u8 repeat_cnt, u8 handle,
-				struct wuie_hdr *wuie)
-{
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-
-	return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_ADD_MMC_IE,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			interval << 8 | repeat_cnt,
-			handle << 8 | iface_no,
-			wuie, wuie->bLength, USB_CTRL_SET_TIMEOUT);
-}
-
-/*
- * Remove an IE to the host's MMC
- *
- * @handle:      See WUSB1.0[8.5.3.1]
- */
-static int __hwahc_op_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
-{
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-	return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_REMOVE_MMC_IE,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			0, handle << 8 | iface_no,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-}
-
-/*
- * Update device information for a given fake port
- *
- * @port_idx: Fake port to which device is connected (wusbhc index, not
- *            USB port number).
- */
-static int __hwahc_op_dev_info_set(struct wusbhc *wusbhc,
-				   struct wusb_dev *wusb_dev)
-{
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-	struct hwa_dev_info *dev_info;
-	int ret;
-
-	/* fill out the Device Info buffer and send it */
-	dev_info = kzalloc(sizeof(struct hwa_dev_info), GFP_KERNEL);
-	if (!dev_info)
-		return -ENOMEM;
-	uwb_mas_bm_copy_le(dev_info->bmDeviceAvailability,
-			   &wusb_dev->availability);
-	dev_info->bDeviceAddress = wusb_dev->addr;
-
-	/*
-	 * If the descriptors haven't been read yet, use a default PHY
-	 * rate of 53.3 Mbit/s only.  The correct value will be used
-	 * when this will be called again as part of the
-	 * authentication process (which occurs after the descriptors
-	 * have been read).
-	 */
-	if (wusb_dev->wusb_cap_descr)
-		dev_info->wPHYRates = wusb_dev->wusb_cap_descr->wPHYRates;
-	else
-		dev_info->wPHYRates = cpu_to_le16(USB_WIRELESS_PHY_53);
-
-	ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			WUSB_REQ_SET_DEV_INFO,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			0, wusb_dev->port_idx << 8 | iface_no,
-			dev_info, sizeof(struct hwa_dev_info),
-			USB_CTRL_SET_TIMEOUT);
-	kfree(dev_info);
-	return ret;
-}
-
-/*
- * Set host's idea of which encryption (and key) method to use when
- * talking to ad evice on a given port.
- *
- * If key is NULL, it means disable encryption for that "virtual port"
- * (used when we disconnect).
- */
-static int __hwahc_dev_set_key(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
-			       const void *key, size_t key_size,
-			       u8 key_idx)
-{
-	int result = -ENOMEM;
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-	struct usb_key_descriptor *keyd;
-	size_t keyd_len;
-
-	keyd_len = sizeof(*keyd) + key_size;
-	keyd = kzalloc(keyd_len, GFP_KERNEL);
-	if (keyd == NULL)
-		return -ENOMEM;
-
-	keyd->bLength = keyd_len;
-	keyd->bDescriptorType = USB_DT_KEY;
-	keyd->tTKID[0] = (tkid >>  0) & 0xff;
-	keyd->tTKID[1] = (tkid >>  8) & 0xff;
-	keyd->tTKID[2] = (tkid >> 16) & 0xff;
-	memcpy(keyd->bKeyData, key, key_size);
-
-	result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			USB_REQ_SET_DESCRIPTOR,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			USB_DT_KEY << 8 | key_idx,
-			port_idx << 8 | iface_no,
-			keyd, keyd_len, USB_CTRL_SET_TIMEOUT);
-
-	kzfree(keyd); /* clear keys etc. */
-	return result;
-}
-
-/*
- * Set host's idea of which encryption (and key) method to use when
- * talking to ad evice on a given port.
- *
- * If key is NULL, it means disable encryption for that "virtual port"
- * (used when we disconnect).
- */
-static int __hwahc_op_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
-			      const void *key, size_t key_size)
-{
-	int result = -ENOMEM;
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	struct wahc *wa = &hwahc->wa;
-	u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
-	u8 encryption_value;
-
-	/* Tell the host which key to use to talk to the device */
-	if (key) {
-		u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_PTK,
-					    WUSB_KEY_INDEX_ORIGINATOR_HOST);
-
-		result = __hwahc_dev_set_key(wusbhc, port_idx, tkid,
-					     key, key_size, key_idx);
-		if (result < 0)
-			goto error_set_key;
-		encryption_value = wusbhc->ccm1_etd->bEncryptionValue;
-	} else {
-		/* FIXME: this should come from wusbhc->etd[UNSECURE].value */
-		encryption_value = 0;
-	}
-
-	/* Set the encryption type for communicating with the device */
-	result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			USB_REQ_SET_ENCRYPTION,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			encryption_value, port_idx << 8 | iface_no,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0)
-		dev_err(wusbhc->dev, "Can't set host's WUSB encryption for "
-			"port index %u to %s (value %d): %d\n", port_idx,
-			wusb_et_name(wusbhc->ccm1_etd->bEncryptionType),
-			wusbhc->ccm1_etd->bEncryptionValue, result);
-error_set_key:
-	return result;
-}
-
-/*
- * Set host's GTK key
- */
-static int __hwahc_op_set_gtk(struct wusbhc *wusbhc, u32 tkid,
-			      const void *key, size_t key_size)
-{
-	u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_GTK,
-				    WUSB_KEY_INDEX_ORIGINATOR_HOST);
-
-	return __hwahc_dev_set_key(wusbhc, 0, tkid, key, key_size, key_idx);
-}
-
-/*
- * Get the Wire Adapter class-specific descriptor
- *
- * NOTE: this descriptor comes with the big bundled configuration
- *       descriptor that includes the interfaces' and endpoints', so
- *       we just look for it in the cached copy kept by the USB stack.
- *
- * NOTE2: We convert LE fields to CPU order.
- */
-static int wa_fill_descr(struct wahc *wa)
-{
-	int result;
-	struct device *dev = &wa->usb_iface->dev;
-	char *itr;
-	struct usb_device *usb_dev = wa->usb_dev;
-	struct usb_descriptor_header *hdr;
-	struct usb_wa_descriptor *wa_descr;
-	size_t itr_size, actconfig_idx;
-
-	actconfig_idx = (usb_dev->actconfig - usb_dev->config) /
-			sizeof(usb_dev->config[0]);
-	itr = usb_dev->rawdescriptors[actconfig_idx];
-	itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
-	while (itr_size >= sizeof(*hdr)) {
-		hdr = (struct usb_descriptor_header *) itr;
-		dev_dbg(dev, "Extra device descriptor: "
-			"type %02x/%u bytes @ %zu (%zu left)\n",
-			hdr->bDescriptorType, hdr->bLength,
-			(itr - usb_dev->rawdescriptors[actconfig_idx]),
-			itr_size);
-		if (hdr->bDescriptorType == USB_DT_WIRE_ADAPTER)
-			goto found;
-		itr += hdr->bLength;
-		itr_size -= hdr->bLength;
-	}
-	dev_err(dev, "cannot find Wire Adapter Class descriptor\n");
-	return -ENODEV;
-
-found:
-	result = -EINVAL;
-	if (hdr->bLength > itr_size) {	/* is it available? */
-		dev_err(dev, "incomplete Wire Adapter Class descriptor "
-			"(%zu bytes left, %u needed)\n",
-			itr_size, hdr->bLength);
-		goto error;
-	}
-	if (hdr->bLength < sizeof(*wa->wa_descr)) {
-		dev_err(dev, "short Wire Adapter Class descriptor\n");
-		goto error;
-	}
-	wa->wa_descr = wa_descr = (struct usb_wa_descriptor *) hdr;
-	if (le16_to_cpu(wa_descr->bcdWAVersion) > 0x0100)
-		dev_warn(dev, "Wire Adapter v%d.%d newer than groked v1.0\n",
-			 (le16_to_cpu(wa_descr->bcdWAVersion) & 0xff00) >> 8,
-			 le16_to_cpu(wa_descr->bcdWAVersion) & 0x00ff);
-	result = 0;
-error:
-	return result;
-}
-
-static const struct hc_driver hwahc_hc_driver = {
-	.description = "hwa-hcd",
-	.product_desc = "Wireless USB HWA host controller",
-	.hcd_priv_size = sizeof(struct hwahc) - sizeof(struct usb_hcd),
-	.irq = NULL,			/* FIXME */
-	.flags = HCD_USB25,
-	.reset = hwahc_op_reset,
-	.start = hwahc_op_start,
-	.stop = hwahc_op_stop,
-	.get_frame_number = hwahc_op_get_frame_number,
-	.urb_enqueue = hwahc_op_urb_enqueue,
-	.urb_dequeue = hwahc_op_urb_dequeue,
-	.endpoint_disable = hwahc_op_endpoint_disable,
-
-	.hub_status_data = wusbhc_rh_status_data,
-	.hub_control = wusbhc_rh_control,
-	.start_port_reset = wusbhc_rh_start_port_reset,
-};
-
-static int hwahc_security_create(struct hwahc *hwahc)
-{
-	int result;
-	struct wusbhc *wusbhc = &hwahc->wusbhc;
-	struct usb_device *usb_dev = hwahc->wa.usb_dev;
-	struct device *dev = &usb_dev->dev;
-	struct usb_security_descriptor *secd;
-	struct usb_encryption_descriptor *etd;
-	void *itr, *top;
-	size_t itr_size, needed, bytes;
-	u8 index;
-	char buf[64];
-
-	/* Find the host's security descriptors in the config descr bundle */
-	index = (usb_dev->actconfig - usb_dev->config) /
-		sizeof(usb_dev->config[0]);
-	itr = usb_dev->rawdescriptors[index];
-	itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
-	top = itr + itr_size;
-	result = __usb_get_extra_descriptor(usb_dev->rawdescriptors[index],
-			le16_to_cpu(usb_dev->actconfig->desc.wTotalLength),
-			USB_DT_SECURITY, (void **) &secd, sizeof(*secd));
-	if (result == -1) {
-		dev_warn(dev, "BUG? WUSB host has no security descriptors\n");
-		return 0;
-	}
-	needed = sizeof(*secd);
-	if (top - (void *)secd < needed) {
-		dev_err(dev, "BUG? Not enough data to process security "
-			"descriptor header (%zu bytes left vs %zu needed)\n",
-			top - (void *) secd, needed);
-		return 0;
-	}
-	needed = le16_to_cpu(secd->wTotalLength);
-	if (top - (void *)secd < needed) {
-		dev_err(dev, "BUG? Not enough data to process security "
-			"descriptors (%zu bytes left vs %zu needed)\n",
-			top - (void *) secd, needed);
-		return 0;
-	}
-	/* Walk over the sec descriptors and store CCM1's on wusbhc */
-	itr = (void *) secd + sizeof(*secd);
-	top = (void *) secd + le16_to_cpu(secd->wTotalLength);
-	index = 0;
-	bytes = 0;
-	while (itr < top) {
-		etd = itr;
-		if (top - itr < sizeof(*etd)) {
-			dev_err(dev, "BUG: bad host security descriptor; "
-				"not enough data (%zu vs %zu left)\n",
-				top - itr, sizeof(*etd));
-			break;
-		}
-		if (etd->bLength < sizeof(*etd)) {
-			dev_err(dev, "BUG: bad host encryption descriptor; "
-				"descriptor is too short "
-				"(%zu vs %zu needed)\n",
-				(size_t)etd->bLength, sizeof(*etd));
-			break;
-		}
-		itr += etd->bLength;
-		bytes += snprintf(buf + bytes, sizeof(buf) - bytes,
-				  "%s (0x%02x) ",
-				  wusb_et_name(etd->bEncryptionType),
-				  etd->bEncryptionValue);
-		wusbhc->ccm1_etd = etd;
-	}
-	dev_info(dev, "supported encryption types: %s\n", buf);
-	if (wusbhc->ccm1_etd == NULL) {
-		dev_err(dev, "E: host doesn't support CCM-1 crypto\n");
-		return 0;
-	}
-	/* Pretty print what we support */
-	return 0;
-}
-
-static void hwahc_security_release(struct hwahc *hwahc)
-{
-	/* nothing to do here so far... */
-}
-
-static int hwahc_create(struct hwahc *hwahc, struct usb_interface *iface,
-	kernel_ulong_t quirks)
-{
-	int result;
-	struct device *dev = &iface->dev;
-	struct wusbhc *wusbhc = &hwahc->wusbhc;
-	struct wahc *wa = &hwahc->wa;
-	struct usb_device *usb_dev = interface_to_usbdev(iface);
-
-	wa->usb_dev = usb_get_dev(usb_dev);	/* bind the USB device */
-	wa->usb_iface = usb_get_intf(iface);
-	wusbhc->dev = dev;
-	/* defer getting the uwb_rc handle until it is needed since it
-	 * may not have been registered by the hwa_rc driver yet. */
-	wusbhc->uwb_rc = NULL;
-	result = wa_fill_descr(wa);	/* Get the device descriptor */
-	if (result < 0)
-		goto error_fill_descriptor;
-	if (wa->wa_descr->bNumPorts > USB_MAXCHILDREN) {
-		dev_err(dev, "FIXME: USB_MAXCHILDREN too low for WUSB "
-			"adapter (%u ports)\n", wa->wa_descr->bNumPorts);
-		wusbhc->ports_max = USB_MAXCHILDREN;
-	} else {
-		wusbhc->ports_max = wa->wa_descr->bNumPorts;
-	}
-	wusbhc->mmcies_max = wa->wa_descr->bNumMMCIEs;
-	wusbhc->start = __hwahc_op_wusbhc_start;
-	wusbhc->stop = __hwahc_op_wusbhc_stop;
-	wusbhc->mmcie_add = __hwahc_op_mmcie_add;
-	wusbhc->mmcie_rm = __hwahc_op_mmcie_rm;
-	wusbhc->dev_info_set = __hwahc_op_dev_info_set;
-	wusbhc->bwa_set = __hwahc_op_bwa_set;
-	wusbhc->set_num_dnts = __hwahc_op_set_num_dnts;
-	wusbhc->set_ptk = __hwahc_op_set_ptk;
-	wusbhc->set_gtk = __hwahc_op_set_gtk;
-	result = hwahc_security_create(hwahc);
-	if (result < 0) {
-		dev_err(dev, "Can't initialize security: %d\n", result);
-		goto error_security_create;
-	}
-	wa->wusb = wusbhc;	/* FIXME: ugly, need to fix */
-	result = wusbhc_create(&hwahc->wusbhc);
-	if (result < 0) {
-		dev_err(dev, "Can't create WUSB HC structures: %d\n", result);
-		goto error_wusbhc_create;
-	}
-	result = wa_create(&hwahc->wa, iface, quirks);
-	if (result < 0)
-		goto error_wa_create;
-	return 0;
-
-error_wa_create:
-	wusbhc_destroy(&hwahc->wusbhc);
-error_wusbhc_create:
-	/* WA Descr fill allocs no resources */
-error_security_create:
-error_fill_descriptor:
-	usb_put_intf(iface);
-	usb_put_dev(usb_dev);
-	return result;
-}
-
-static void hwahc_destroy(struct hwahc *hwahc)
-{
-	struct wusbhc *wusbhc = &hwahc->wusbhc;
-
-	mutex_lock(&wusbhc->mutex);
-	__wa_destroy(&hwahc->wa);
-	wusbhc_destroy(&hwahc->wusbhc);
-	hwahc_security_release(hwahc);
-	hwahc->wusbhc.dev = NULL;
-	uwb_rc_put(wusbhc->uwb_rc);
-	usb_put_intf(hwahc->wa.usb_iface);
-	usb_put_dev(hwahc->wa.usb_dev);
-	mutex_unlock(&wusbhc->mutex);
-}
-
-static void hwahc_init(struct hwahc *hwahc)
-{
-	wa_init(&hwahc->wa);
-}
-
-static int hwahc_probe(struct usb_interface *usb_iface,
-		       const struct usb_device_id *id)
-{
-	int result;
-	struct usb_hcd *usb_hcd;
-	struct wusbhc *wusbhc;
-	struct hwahc *hwahc;
-	struct device *dev = &usb_iface->dev;
-
-	result = -ENOMEM;
-	usb_hcd = usb_create_hcd(&hwahc_hc_driver, &usb_iface->dev, "wusb-hwa");
-	if (usb_hcd == NULL) {
-		dev_err(dev, "unable to allocate instance\n");
-		goto error_alloc;
-	}
-	usb_hcd->wireless = 1;
-	usb_hcd->self.sg_tablesize = ~0;
-	wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	hwahc_init(hwahc);
-	result = hwahc_create(hwahc, usb_iface, id->driver_info);
-	if (result < 0) {
-		dev_err(dev, "Cannot initialize internals: %d\n", result);
-		goto error_hwahc_create;
-	}
-	result = usb_add_hcd(usb_hcd, 0, 0);
-	if (result < 0) {
-		dev_err(dev, "Cannot add HCD: %d\n", result);
-		goto error_add_hcd;
-	}
-	device_wakeup_enable(usb_hcd->self.controller);
-	result = wusbhc_b_create(&hwahc->wusbhc);
-	if (result < 0) {
-		dev_err(dev, "Cannot setup phase B of WUSBHC: %d\n", result);
-		goto error_wusbhc_b_create;
-	}
-	return 0;
-
-error_wusbhc_b_create:
-	usb_remove_hcd(usb_hcd);
-error_add_hcd:
-	hwahc_destroy(hwahc);
-error_hwahc_create:
-	usb_put_hcd(usb_hcd);
-error_alloc:
-	return result;
-}
-
-static void hwahc_disconnect(struct usb_interface *usb_iface)
-{
-	struct usb_hcd *usb_hcd;
-	struct wusbhc *wusbhc;
-	struct hwahc *hwahc;
-
-	usb_hcd = usb_get_intfdata(usb_iface);
-	wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	wusbhc_b_destroy(&hwahc->wusbhc);
-	usb_remove_hcd(usb_hcd);
-	hwahc_destroy(hwahc);
-	usb_put_hcd(usb_hcd);
-}
-
-static const struct usb_device_id hwahc_id_table[] = {
-	/* Alereon 5310 */
-	{ USB_DEVICE_AND_INTERFACE_INFO(0x13dc, 0x5310, 0xe0, 0x02, 0x01),
-	  .driver_info = WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC |
-		WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS },
-	/* Alereon 5611 */
-	{ USB_DEVICE_AND_INTERFACE_INFO(0x13dc, 0x5611, 0xe0, 0x02, 0x01),
-	  .driver_info = WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC |
-		WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS },
-	/* FIXME: use class labels for this */
-	{ USB_INTERFACE_INFO(0xe0, 0x02, 0x01), },
-	{},
-};
-MODULE_DEVICE_TABLE(usb, hwahc_id_table);
-
-static struct usb_driver hwahc_driver = {
-	.name =		"hwa-hc",
-	.probe =	hwahc_probe,
-	.disconnect =	hwahc_disconnect,
-	.id_table =	hwahc_id_table,
-};
-
-module_usb_driver(hwahc_driver);
-
-MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
-MODULE_DESCRIPTION("Host Wired Adapter USB Host Control Driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index 6e3dad19d369..5835f9966204 100644
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -1771,7 +1771,7 @@ static const struct hc_driver imx21_hc_driver = {
 	.product_desc = "IMX21 USB Host Controller",
 	.hcd_priv_size = sizeof(struct imx21),
 
-	.flags = HCD_USB11,
+	.flags = HCD_DMA | HCD_USB11,
 	.irq = imx21_irq,
 
 	.reset = imx21_hc_reset,
@@ -1836,10 +1836,8 @@ static int imx21_probe(struct platform_device *pdev)
 	if (!res)
 		return -ENODEV;
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	hcd = usb_create_hcd(&imx21_hc_driver,
 		&pdev->dev, dev_name(&pdev->dev));
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 74da136d322a..a87c0b26279e 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1581,12 +1581,6 @@ static int isp116x_probe(struct platform_device *pdev)
 	irq = ires->start;
 	irqflags = ires->flags & IRQF_TRIGGER_MASK;
 
-	if (pdev->dev.dma_mask) {
-		DBG("DMA not supported\n");
-		ret = -EINVAL;
-		goto err1;
-	}
-
 	if (!request_mem_region(addr->start, 2, hcd_name)) {
 		ret = -EBUSY;
 		goto err1;
diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index 28bf8bfb091e..96f8daa11f25 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -2645,11 +2645,6 @@ static int isp1362_probe(struct platform_device *pdev)
 	if (pdev->num_resources < 3)
 		return -ENODEV;
 
-	if (pdev->dev.dma_mask) {
-		DBG(1, "won't do DMA");
-		return -ENODEV;
-	}
-
 	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (!irq_res)
 		return -ENODEV;
diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c
index afa321ab55fc..8819f502b6a6 100644
--- a/drivers/usb/host/max3421-hcd.c
+++ b/drivers/usb/host/max3421-hcd.c
@@ -1800,21 +1800,6 @@ max3421_bus_resume(struct usb_hcd *hcd)
 	return -1;
 }
 
-/*
- * The SPI driver already takes care of DMA-mapping/unmapping, so no
- * reason to do it twice.
- */
-static int
-max3421_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
-{
-	return 0;
-}
-
-static void
-max3421_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
-{
-}
-
 static const struct hc_driver max3421_hcd_desc = {
 	.description =		"max3421",
 	.product_desc =		DRIVER_DESC,
@@ -1826,8 +1811,6 @@ static const struct hc_driver max3421_hcd_desc = {
 	.get_frame_number =	max3421_get_frame_number,
 	.urb_enqueue =		max3421_urb_enqueue,
 	.urb_dequeue =		max3421_urb_dequeue,
-	.map_urb_for_dma =	max3421_map_urb_for_dma,
-	.unmap_urb_for_dma =	max3421_unmap_urb_for_dma,
 	.endpoint_disable =	max3421_endpoint_disable,
 	.hub_status_data =	max3421_hub_status_data,
 	.hub_control =		max3421_hub_control,
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 905c6317e0c3..d5ce98e205c7 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -32,6 +32,7 @@ struct exynos_ohci_hcd {
 	struct clk *clk;
 	struct device_node *of_node;
 	struct phy *phy[PHY_NUMBER];
+	bool legacy_phy;
 };
 
 static int exynos_ohci_get_phy(struct device *dev,
@@ -39,10 +40,22 @@ static int exynos_ohci_get_phy(struct device *dev,
 {
 	struct device_node *child;
 	struct phy *phy;
-	int phy_number;
+	int phy_number, num_phys;
 	int ret;
 
 	/* Get PHYs for the controller */
+	num_phys = of_count_phandle_with_args(dev->of_node, "phys",
+					      "#phy-cells");
+	for (phy_number = 0; phy_number < num_phys; phy_number++) {
+		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);
+		if (IS_ERR(phy))
+			return PTR_ERR(phy);
+		exynos_ohci->phy[phy_number] = phy;
+	}
+	if (num_phys > 0)
+		return 0;
+
+	/* Get PHYs using legacy bindings */
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
 		if (ret) {
@@ -73,6 +86,7 @@ static int exynos_ohci_get_phy(struct device *dev,
 		}
 	}
 
+	exynos_ohci->legacy_phy = true;
 	return 0;
 }
 
@@ -172,11 +186,12 @@ static int exynos_ohci_probe(struct platform_device *pdev)
 	}
 
 	/*
-	 * Workaround: reset of_node pointer to avoid conflict between Exynos
-	 * OHCI port subnodes and generic USB device bindings
+	 * Workaround: reset of_node pointer to avoid conflict between legacy
+	 * Exynos OHCI port subnodes and generic USB device bindings
 	 */
 	exynos_ohci->of_node = pdev->dev.of_node;
-	pdev->dev.of_node = NULL;
+	if (exynos_ohci->legacy_phy)
+		pdev->dev.of_node = NULL;
 
 	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (err) {
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 1fe3deec35cf..4de91653a2c7 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1187,7 +1187,7 @@ static const struct hc_driver ohci_hc_driver = {
 	 * generic hardware linkage
 	*/
 	.irq =                  ohci_irq,
-	.flags =                HCD_MEMORY | HCD_USB11,
+	.flags =                HCD_MEMORY | HCD_DMA | HCD_USB11,
 
 	/*
 	* basic lifecycle operations
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 65a1c3fdc88c..7addfc2cbadc 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -111,10 +111,8 @@ static int ohci_platform_probe(struct platform_device *dev)
 		return err;
 
 	irq = platform_get_irq(dev, 0);
-	if (irq < 0) {
-		dev_err(&dev->dev, "no irq provided");
+	if (irq < 0)
 		return irq;
-	}
 
 	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 			dev_name(&dev->dev));
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 76a9b40b08f1..45f7cceb6df3 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -50,7 +50,7 @@ static const struct hc_driver ohci_ppc_of_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			ohci_irq,
-	.flags =		HCD_USB11 | HCD_MEMORY,
+	.flags =		HCD_USB11 | HCD_DMA | HCD_MEMORY,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ohci-ps3.c b/drivers/usb/host/ohci-ps3.c
index 395f9d3bc849..f77cd6af0ccf 100644
--- a/drivers/usb/host/ohci-ps3.c
+++ b/drivers/usb/host/ohci-ps3.c
@@ -46,7 +46,7 @@ static const struct hc_driver ps3_ohci_hc_driver = {
 	.product_desc		= "PS3 OHCI Host Controller",
 	.hcd_priv_size		= sizeof(struct ohci_hcd),
 	.irq			= ohci_irq,
-	.flags			= HCD_MEMORY | HCD_USB11,
+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB11,
 	.reset			= ps3_ohci_hc_reset,
 	.start			= ps3_ohci_hc_start,
 	.stop			= ohci_stop,
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 3e2474959735..7679fb583e41 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -148,7 +148,7 @@ static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *pxa_ohci, int mode)
 		uhcrhda |= RH_A_NPS;
 		break;
 	case PMM_GLOBAL_MODE:
-		uhcrhda &= ~(RH_A_NPS & RH_A_PSM);
+		uhcrhda &= ~(RH_A_NPS | RH_A_PSM);
 		break;
 	case PMM_PERPORT_MODE:
 		uhcrhda &= ~(RH_A_NPS);
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
index ebec9a7699e3..8e19a5eb5b62 100644
--- a/drivers/usb/host/ohci-sa1111.c
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -84,7 +84,7 @@ static const struct hc_driver ohci_sa1111_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			ohci_irq,
-	.flags =		HCD_USB11 | HCD_MEMORY,
+	.flags =		HCD_USB11 | HCD_DMA | HCD_MEMORY,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/ohci-st.c b/drivers/usb/host/ohci-st.c
index 638a92bd2cdc..ac796ccd93ef 100644
--- a/drivers/usb/host/ohci-st.c
+++ b/drivers/usb/host/ohci-st.c
@@ -138,10 +138,8 @@ static int st_ohci_platform_probe(struct platform_device *dev)
 		return -ENODEV;
 
 	irq = platform_get_irq(dev, 0);
-	if (irq < 0) {
-		dev_err(&dev->dev, "no irq provided");
+	if (irq < 0)
 		return irq;
-	}
 
 	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	if (!res_mem) {
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index d5a293a707b6..fb6f5e9ae5c6 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -97,10 +97,13 @@ static void tmio_stop_hc(struct platform_device *dev)
 	switch (ohci->num_ports) {
 		default:
 			dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports);
+			/* fall through */
 		case 3:
 			pm |= CCR_PM_USBPW3;
+			/* fall through */
 		case 2:
 			pm |= CCR_PM_USBPW2;
+			/* fall through */
 		case 1:
 			pm |= CCR_PM_USBPW1;
 	}
diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index 47c5515a9ce4..e67242e437ed 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -31,10 +31,449 @@
 #include <linux/irq.h>
 #include <linux/platform_device.h>
 
-#include "oxu210hp.h"
-
 #define DRIVER_VERSION "0.0.50"
 
+#define OXU_DEVICEID			0x00
+	#define OXU_REV_MASK		0xffff0000
+	#define OXU_REV_SHIFT		16
+	#define OXU_REV_2100		0x2100
+	#define OXU_BO_SHIFT		8
+	#define OXU_BO_MASK		(0x3 << OXU_BO_SHIFT)
+	#define OXU_MAJ_REV_SHIFT	4
+	#define OXU_MAJ_REV_MASK	(0xf << OXU_MAJ_REV_SHIFT)
+	#define OXU_MIN_REV_SHIFT	0
+	#define OXU_MIN_REV_MASK	(0xf << OXU_MIN_REV_SHIFT)
+#define OXU_HOSTIFCONFIG		0x04
+#define OXU_SOFTRESET			0x08
+	#define OXU_SRESET		(1 << 0)
+
+#define OXU_PIOBURSTREADCTRL		0x0C
+
+#define OXU_CHIPIRQSTATUS		0x10
+#define OXU_CHIPIRQEN_SET		0x14
+#define OXU_CHIPIRQEN_CLR		0x18
+	#define OXU_USBSPHLPWUI		0x00000080
+	#define OXU_USBOTGLPWUI		0x00000040
+	#define OXU_USBSPHI		0x00000002
+	#define OXU_USBOTGI		0x00000001
+
+#define OXU_CLKCTRL_SET			0x1C
+	#define OXU_SYSCLKEN		0x00000008
+	#define OXU_USBSPHCLKEN		0x00000002
+	#define OXU_USBOTGCLKEN		0x00000001
+
+#define OXU_ASO				0x68
+	#define OXU_SPHPOEN		0x00000100
+	#define OXU_OVRCCURPUPDEN	0x00000800
+	#define OXU_ASO_OP		(1 << 10)
+	#define OXU_COMPARATOR		0x000004000
+
+#define OXU_USBMODE			0x1A8
+	#define OXU_VBPS		0x00000020
+	#define OXU_ES_LITTLE		0x00000000
+	#define OXU_CM_HOST_ONLY	0x00000003
+
+/*
+ * Proper EHCI structs & defines
+ */
+
+/* Magic numbers that can affect system performance */
+#define EHCI_TUNE_CERR		3	/* 0-3 qtd retries; 0 == don't stop */
+#define EHCI_TUNE_RL_HS		4	/* nak throttle; see 4.9 */
+#define EHCI_TUNE_RL_TT		0
+#define EHCI_TUNE_MULT_HS	1	/* 1-3 transactions/uframe; 4.10.3 */
+#define EHCI_TUNE_MULT_TT	1
+#define EHCI_TUNE_FLS		2	/* (small) 256 frame schedule */
+
+struct oxu_hcd;
+
+/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
+
+/* Section 2.2 Host Controller Capability Registers */
+struct ehci_caps {
+	/* these fields are specified as 8 and 16 bit registers,
+	 * but some hosts can't perform 8 or 16 bit PCI accesses.
+	 */
+	u32		hc_capbase;
+#define HC_LENGTH(p)		(((p)>>00)&0x00ff)	/* bits 7:0 */
+#define HC_VERSION(p)		(((p)>>16)&0xffff)	/* bits 31:16 */
+	u32		hcs_params;     /* HCSPARAMS - offset 0x4 */
+#define HCS_DEBUG_PORT(p)	(((p)>>20)&0xf)	/* bits 23:20, debug port? */
+#define HCS_INDICATOR(p)	((p)&(1 << 16))	/* true: has port indicators */
+#define HCS_N_CC(p)		(((p)>>12)&0xf)	/* bits 15:12, #companion HCs */
+#define HCS_N_PCC(p)		(((p)>>8)&0xf)	/* bits 11:8, ports per CC */
+#define HCS_PORTROUTED(p)	((p)&(1 << 7))	/* true: port routing */
+#define HCS_PPC(p)		((p)&(1 << 4))	/* true: port power control */
+#define HCS_N_PORTS(p)		(((p)>>0)&0xf)	/* bits 3:0, ports on HC */
+
+	u32		hcc_params;      /* HCCPARAMS - offset 0x8 */
+#define HCC_EXT_CAPS(p)		(((p)>>8)&0xff)	/* for pci extended caps */
+#define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
+#define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
+#define HCC_CANPARK(p)		((p)&(1 << 2))  /* true: can park on async qh */
+#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1))  /* true: periodic_size changes*/
+#define HCC_64BIT_ADDR(p)       ((p)&(1))       /* true: can use 64-bit addr */
+	u8		portroute[8];	 /* nibbles for routing - offset 0xC */
+} __packed;
+
+
+/* Section 2.3 Host Controller Operational Registers */
+struct ehci_regs {
+	/* USBCMD: offset 0x00 */
+	u32		command;
+/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
+#define CMD_PARK	(1<<11)		/* enable "park" on async qh */
+#define CMD_PARK_CNT(c)	(((c)>>8)&3)	/* how many transfers to park for */
+#define CMD_LRESET	(1<<7)		/* partial reset (no ports, etc) */
+#define CMD_IAAD	(1<<6)		/* "doorbell" interrupt async advance */
+#define CMD_ASE		(1<<5)		/* async schedule enable */
+#define CMD_PSE		(1<<4)		/* periodic schedule enable */
+/* 3:2 is periodic frame list size */
+#define CMD_RESET	(1<<1)		/* reset HC not bus */
+#define CMD_RUN		(1<<0)		/* start/stop HC */
+
+	/* USBSTS: offset 0x04 */
+	u32		status;
+#define STS_ASS		(1<<15)		/* Async Schedule Status */
+#define STS_PSS		(1<<14)		/* Periodic Schedule Status */
+#define STS_RECL	(1<<13)		/* Reclamation */
+#define STS_HALT	(1<<12)		/* Not running (any reason) */
+/* some bits reserved */
+	/* these STS_* flags are also intr_enable bits (USBINTR) */
+#define STS_IAA		(1<<5)		/* Interrupted on async advance */
+#define STS_FATAL	(1<<4)		/* such as some PCI access errors */
+#define STS_FLR		(1<<3)		/* frame list rolled over */
+#define STS_PCD		(1<<2)		/* port change detect */
+#define STS_ERR		(1<<1)		/* "error" completion (overflow, ...) */
+#define STS_INT		(1<<0)		/* "normal" completion (short, ...) */
+
+#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
+
+	/* USBINTR: offset 0x08 */
+	u32		intr_enable;
+
+	/* FRINDEX: offset 0x0C */
+	u32		frame_index;	/* current microframe number */
+	/* CTRLDSSEGMENT: offset 0x10 */
+	u32		segment;	/* address bits 63:32 if needed */
+	/* PERIODICLISTBASE: offset 0x14 */
+	u32		frame_list;	/* points to periodic list */
+	/* ASYNCLISTADDR: offset 0x18 */
+	u32		async_next;	/* address of next async queue head */
+
+	u32		reserved[9];
+
+	/* CONFIGFLAG: offset 0x40 */
+	u32		configured_flag;
+#define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */
+
+	/* PORTSC: offset 0x44 */
+	u32		port_status[0];	/* up to N_PORTS */
+/* 31:23 reserved */
+#define PORT_WKOC_E	(1<<22)		/* wake on overcurrent (enable) */
+#define PORT_WKDISC_E	(1<<21)		/* wake on disconnect (enable) */
+#define PORT_WKCONN_E	(1<<20)		/* wake on connect (enable) */
+/* 19:16 for port testing */
+#define PORT_LED_OFF	(0<<14)
+#define PORT_LED_AMBER	(1<<14)
+#define PORT_LED_GREEN	(2<<14)
+#define PORT_LED_MASK	(3<<14)
+#define PORT_OWNER	(1<<13)		/* true: companion hc owns this port */
+#define PORT_POWER	(1<<12)		/* true: has power (see PPC) */
+#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10))	/* USB 1.1 device */
+/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
+/* 9 reserved */
+#define PORT_RESET	(1<<8)		/* reset port */
+#define PORT_SUSPEND	(1<<7)		/* suspend port */
+#define PORT_RESUME	(1<<6)		/* resume it */
+#define PORT_OCC	(1<<5)		/* over current change */
+#define PORT_OC		(1<<4)		/* over current active */
+#define PORT_PEC	(1<<3)		/* port enable change */
+#define PORT_PE		(1<<2)		/* port enable */
+#define PORT_CSC	(1<<1)		/* connect status change */
+#define PORT_CONNECT	(1<<0)		/* device connected */
+#define PORT_RWC_BITS   (PORT_CSC | PORT_PEC | PORT_OCC)
+} __packed;
+
+/* Appendix C, Debug port ... intended for use with special "debug devices"
+ * that can help if there's no serial console.  (nonstandard enumeration.)
+ */
+struct ehci_dbg_port {
+	u32	control;
+#define DBGP_OWNER	(1<<30)
+#define DBGP_ENABLED	(1<<28)
+#define DBGP_DONE	(1<<16)
+#define DBGP_INUSE	(1<<10)
+#define DBGP_ERRCODE(x)	(((x)>>7)&0x07)
+#	define DBGP_ERR_BAD	1
+#	define DBGP_ERR_SIGNAL	2
+#define DBGP_ERROR	(1<<6)
+#define DBGP_GO		(1<<5)
+#define DBGP_OUT	(1<<4)
+#define DBGP_LEN(x)	(((x)>>0)&0x0f)
+	u32	pids;
+#define DBGP_PID_GET(x)		(((x)>>16)&0xff)
+#define DBGP_PID_SET(data, tok)	(((data)<<8)|(tok))
+	u32	data03;
+	u32	data47;
+	u32	address;
+#define DBGP_EPADDR(dev, ep)	(((dev)<<8)|(ep))
+} __packed;
+
+#define	QTD_NEXT(dma)	cpu_to_le32((u32)dma)
+
+/*
+ * EHCI Specification 0.95 Section 3.5
+ * QTD: describe data transfer components (buffer, direction, ...)
+ * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
+ *
+ * These are associated only with "QH" (Queue Head) structures,
+ * used with control, bulk, and interrupt transfers.
+ */
+struct ehci_qtd {
+	/* first part defined by EHCI spec */
+	__le32			hw_next;		/* see EHCI 3.5.1 */
+	__le32			hw_alt_next;		/* see EHCI 3.5.2 */
+	__le32			hw_token;		/* see EHCI 3.5.3 */
+#define	QTD_TOGGLE	(1 << 31)	/* data toggle */
+#define	QTD_LENGTH(tok)	(((tok)>>16) & 0x7fff)
+#define	QTD_IOC		(1 << 15)	/* interrupt on complete */
+#define	QTD_CERR(tok)	(((tok)>>10) & 0x3)
+#define	QTD_PID(tok)	(((tok)>>8) & 0x3)
+#define	QTD_STS_ACTIVE	(1 << 7)	/* HC may execute this */
+#define	QTD_STS_HALT	(1 << 6)	/* halted on error */
+#define	QTD_STS_DBE	(1 << 5)	/* data buffer error (in HC) */
+#define	QTD_STS_BABBLE	(1 << 4)	/* device was babbling (qtd halted) */
+#define	QTD_STS_XACT	(1 << 3)	/* device gave illegal response */
+#define	QTD_STS_MMF	(1 << 2)	/* incomplete split transaction */
+#define	QTD_STS_STS	(1 << 1)	/* split transaction state */
+#define	QTD_STS_PING	(1 << 0)	/* issue PING? */
+	__le32			hw_buf[5];		/* see EHCI 3.5.4 */
+	__le32			hw_buf_hi[5];		/* Appendix B */
+
+	/* the rest is HCD-private */
+	dma_addr_t		qtd_dma;		/* qtd address */
+	struct list_head	qtd_list;		/* sw qtd list */
+	struct urb		*urb;			/* qtd's urb */
+	size_t			length;			/* length of buffer */
+
+	u32			qtd_buffer_len;
+	void			*buffer;
+	dma_addr_t		buffer_dma;
+	void			*transfer_buffer;
+	void			*transfer_dma;
+} __aligned(32);
+
+/* mask NakCnt+T in qh->hw_alt_next */
+#define QTD_MASK cpu_to_le32 (~0x1f)
+
+#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
+
+/* Type tag from {qh, itd, sitd, fstn}->hw_next */
+#define Q_NEXT_TYPE(dma) ((dma) & cpu_to_le32 (3 << 1))
+
+/* values for that type tag */
+#define Q_TYPE_QH	cpu_to_le32 (1 << 1)
+
+/* next async queue entry, or pointer to interrupt/periodic QH */
+#define	QH_NEXT(dma)	(cpu_to_le32(((u32)dma)&~0x01f)|Q_TYPE_QH)
+
+/* for periodic/async schedules and qtd lists, mark end of list */
+#define	EHCI_LIST_END	cpu_to_le32(1) /* "null pointer" to hw */
+
+/*
+ * Entries in periodic shadow table are pointers to one of four kinds
+ * of data structure.  That's dictated by the hardware; a type tag is
+ * encoded in the low bits of the hardware's periodic schedule.  Use
+ * Q_NEXT_TYPE to get the tag.
+ *
+ * For entries in the async schedule, the type tag always says "qh".
+ */
+union ehci_shadow {
+	struct ehci_qh		*qh;		/* Q_TYPE_QH */
+	__le32			*hw_next;	/* (all types) */
+	void			*ptr;
+};
+
+/*
+ * EHCI Specification 0.95 Section 3.6
+ * QH: describes control/bulk/interrupt endpoints
+ * See Fig 3-7 "Queue Head Structure Layout".
+ *
+ * These appear in both the async and (for interrupt) periodic schedules.
+ */
+
+struct ehci_qh {
+	/* first part defined by EHCI spec */
+	__le32			hw_next;	 /* see EHCI 3.6.1 */
+	__le32			hw_info1;	/* see EHCI 3.6.2 */
+#define	QH_HEAD		0x00008000
+	__le32			hw_info2;	/* see EHCI 3.6.2 */
+#define	QH_SMASK	0x000000ff
+#define	QH_CMASK	0x0000ff00
+#define	QH_HUBADDR	0x007f0000
+#define	QH_HUBPORT	0x3f800000
+#define	QH_MULT		0xc0000000
+	__le32			hw_current;	 /* qtd list - see EHCI 3.6.4 */
+
+	/* qtd overlay (hardware parts of a struct ehci_qtd) */
+	__le32			hw_qtd_next;
+	__le32			hw_alt_next;
+	__le32			hw_token;
+	__le32			hw_buf[5];
+	__le32			hw_buf_hi[5];
+
+	/* the rest is HCD-private */
+	dma_addr_t		qh_dma;		/* address of qh */
+	union ehci_shadow	qh_next;	/* ptr to qh; or periodic */
+	struct list_head	qtd_list;	/* sw qtd list */
+	struct ehci_qtd		*dummy;
+	struct ehci_qh		*reclaim;	/* next to reclaim */
+
+	struct oxu_hcd		*oxu;
+	struct kref		kref;
+	unsigned int		stamp;
+
+	u8			qh_state;
+#define	QH_STATE_LINKED		1		/* HC sees this */
+#define	QH_STATE_UNLINK		2		/* HC may still see this */
+#define	QH_STATE_IDLE		3		/* HC doesn't see this */
+#define	QH_STATE_UNLINK_WAIT	4		/* LINKED and on reclaim q */
+#define	QH_STATE_COMPLETING	5		/* don't touch token.HALT */
+
+	/* periodic schedule info */
+	u8			usecs;		/* intr bandwidth */
+	u8			gap_uf;		/* uframes split/csplit gap */
+	u8			c_usecs;	/* ... split completion bw */
+	u16			tt_usecs;	/* tt downstream bandwidth */
+	unsigned short		period;		/* polling interval */
+	unsigned short		start;		/* where polling starts */
+#define NO_FRAME ((unsigned short)~0)			/* pick new start */
+	struct usb_device	*dev;		/* access to TT */
+} __aligned(32);
+
+/*
+ * Proper OXU210HP structs
+ */
+
+#define OXU_OTG_CORE_OFFSET	0x00400
+#define OXU_OTG_CAP_OFFSET	(OXU_OTG_CORE_OFFSET + 0x100)
+#define OXU_SPH_CORE_OFFSET	0x00800
+#define OXU_SPH_CAP_OFFSET	(OXU_SPH_CORE_OFFSET + 0x100)
+
+#define OXU_OTG_MEM		0xE000
+#define OXU_SPH_MEM		0x16000
+
+/* Only how many elements & element structure are specifies here. */
+/* 2 host controllers are enabled - total size <= 28 kbytes */
+#define	DEFAULT_I_TDPS		1024
+#define QHEAD_NUM		16
+#define QTD_NUM			32
+#define SITD_NUM		8
+#define MURB_NUM		8
+
+#define BUFFER_NUM		8
+#define BUFFER_SIZE		512
+
+struct oxu_info {
+	struct usb_hcd *hcd[2];
+};
+
+struct oxu_buf {
+	u8			buffer[BUFFER_SIZE];
+} __aligned(BUFFER_SIZE);
+
+struct oxu_onchip_mem {
+	struct oxu_buf		db_pool[BUFFER_NUM];
+
+	u32			frame_list[DEFAULT_I_TDPS];
+	struct ehci_qh		qh_pool[QHEAD_NUM];
+	struct ehci_qtd		qtd_pool[QTD_NUM];
+} __aligned(4 << 10);
+
+#define	EHCI_MAX_ROOT_PORTS	15		/* see HCS_N_PORTS */
+
+struct oxu_murb {
+	struct urb		urb;
+	struct urb		*main;
+	u8			last;
+};
+
+struct oxu_hcd {				/* one per controller */
+	unsigned int		is_otg:1;
+
+	u8			qh_used[QHEAD_NUM];
+	u8			qtd_used[QTD_NUM];
+	u8			db_used[BUFFER_NUM];
+	u8			murb_used[MURB_NUM];
+
+	struct oxu_onchip_mem	__iomem *mem;
+	spinlock_t		mem_lock;
+
+	struct timer_list	urb_timer;
+
+	struct ehci_caps __iomem *caps;
+	struct ehci_regs __iomem *regs;
+
+	u32			hcs_params;	/* cached register copy */
+	spinlock_t		lock;
+
+	/* async schedule support */
+	struct ehci_qh		*async;
+	struct ehci_qh		*reclaim;
+	unsigned int		reclaim_ready:1;
+	unsigned int		scanning:1;
+
+	/* periodic schedule support */
+	unsigned int		periodic_size;
+	__le32			*periodic;	/* hw periodic table */
+	dma_addr_t		periodic_dma;
+	unsigned int		i_thresh;	/* uframes HC might cache */
+
+	union ehci_shadow	*pshadow;	/* mirror hw periodic table */
+	int			next_uframe;	/* scan periodic, start here */
+	unsigned int		periodic_sched;	/* periodic activity count */
+
+	/* per root hub port */
+	unsigned long		reset_done[EHCI_MAX_ROOT_PORTS];
+	/* bit vectors (one bit per port) */
+	unsigned long		bus_suspended;	/* which ports were
+						 * already suspended at the
+						 * start of a bus suspend
+						 */
+	unsigned long		companion_ports;/* which ports are dedicated
+						 * to the companion controller
+						 */
+
+	struct timer_list	watchdog;
+	unsigned long		actions;
+	unsigned int		stamp;
+	unsigned long		next_statechange;
+	u32			command;
+
+	/* SILICON QUIRKS */
+	struct list_head	urb_list;	/* this is the head to urb
+						 * queue that didn't get enough
+						 * resources
+						 */
+	struct oxu_murb		*murb_pool;	/* murb per split big urb */
+	unsigned int		urb_len;
+
+	u8			sbrn;		/* packed release number */
+};
+
+#define EHCI_IAA_JIFFIES	(HZ/100)	/* arbitrary; ~10 msec */
+#define EHCI_IO_JIFFIES		(HZ/10)		/* io watchdog > irq_thresh */
+#define EHCI_ASYNC_JIFFIES      (HZ/20)		/* async idle timeout */
+#define EHCI_SHRINK_JIFFIES     (HZ/200)	/* async qh unlink delay */
+
+enum ehci_timer_action {
+	TIMER_IO_WATCHDOG,
+	TIMER_IAA_WATCHDOG,
+	TIMER_ASYNC_SHRINK,
+	TIMER_ASYNC_OFF,
+};
+
 /*
  * Main defines
  */
@@ -2649,9 +3088,6 @@ static int oxu_reset(struct usb_hcd *hcd)
 	INIT_LIST_HEAD(&oxu->urb_list);
 	oxu->urb_len = 0;
 
-	/* FIMXE */
-	hcd->self.controller->dma_mask = NULL;
-
 	if (oxu->is_otg) {
 		oxu->caps = hcd->regs + OXU_OTG_CAP_OFFSET;
 		oxu->regs = hcd->regs + OXU_OTG_CAP_OFFSET + \
diff --git a/drivers/usb/host/oxu210hp.h b/drivers/usb/host/oxu210hp.h
deleted file mode 100644
index 437044147862..000000000000
--- a/drivers/usb/host/oxu210hp.h
+++ /dev/null
@@ -1,448 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Host interface registers
- */
-
-#define OXU_DEVICEID			0x00
-	#define OXU_REV_MASK		0xffff0000
-	#define OXU_REV_SHIFT		16
-	#define OXU_REV_2100		0x2100
-	#define OXU_BO_SHIFT		8
-	#define OXU_BO_MASK		(0x3 << OXU_BO_SHIFT)
-	#define OXU_MAJ_REV_SHIFT	4
-	#define OXU_MAJ_REV_MASK	(0xf << OXU_MAJ_REV_SHIFT)
-	#define OXU_MIN_REV_SHIFT	0
-	#define OXU_MIN_REV_MASK	(0xf << OXU_MIN_REV_SHIFT)
-#define OXU_HOSTIFCONFIG		0x04
-#define OXU_SOFTRESET			0x08
-	#define OXU_SRESET		(1 << 0)
-
-#define OXU_PIOBURSTREADCTRL		0x0C
-
-#define OXU_CHIPIRQSTATUS		0x10
-#define OXU_CHIPIRQEN_SET		0x14
-#define OXU_CHIPIRQEN_CLR		0x18
-	#define OXU_USBSPHLPWUI		0x00000080
-	#define OXU_USBOTGLPWUI		0x00000040
-	#define OXU_USBSPHI		0x00000002
-	#define OXU_USBOTGI		0x00000001
-
-#define OXU_CLKCTRL_SET			0x1C
-	#define OXU_SYSCLKEN		0x00000008
-	#define OXU_USBSPHCLKEN		0x00000002
-	#define OXU_USBOTGCLKEN		0x00000001
-
-#define OXU_ASO				0x68
-	#define OXU_SPHPOEN		0x00000100
-	#define OXU_OVRCCURPUPDEN	0x00000800
-	#define OXU_ASO_OP		(1 << 10)
-	#define OXU_COMPARATOR		0x000004000
-
-#define OXU_USBMODE			0x1A8
-	#define OXU_VBPS		0x00000020
-	#define OXU_ES_LITTLE		0x00000000
-	#define OXU_CM_HOST_ONLY	0x00000003
-
-/*
- * Proper EHCI structs & defines
- */
-
-/* Magic numbers that can affect system performance */
-#define EHCI_TUNE_CERR		3	/* 0-3 qtd retries; 0 == don't stop */
-#define EHCI_TUNE_RL_HS		4	/* nak throttle; see 4.9 */
-#define EHCI_TUNE_RL_TT		0
-#define EHCI_TUNE_MULT_HS	1	/* 1-3 transactions/uframe; 4.10.3 */
-#define EHCI_TUNE_MULT_TT	1
-#define EHCI_TUNE_FLS		2	/* (small) 256 frame schedule */
-
-struct oxu_hcd;
-
-/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
-
-/* Section 2.2 Host Controller Capability Registers */
-struct ehci_caps {
-	/* these fields are specified as 8 and 16 bit registers,
-	 * but some hosts can't perform 8 or 16 bit PCI accesses.
-	 */
-	u32		hc_capbase;
-#define HC_LENGTH(p)		(((p)>>00)&0x00ff)	/* bits 7:0 */
-#define HC_VERSION(p)		(((p)>>16)&0xffff)	/* bits 31:16 */
-	u32		hcs_params;     /* HCSPARAMS - offset 0x4 */
-#define HCS_DEBUG_PORT(p)	(((p)>>20)&0xf)	/* bits 23:20, debug port? */
-#define HCS_INDICATOR(p)	((p)&(1 << 16))	/* true: has port indicators */
-#define HCS_N_CC(p)		(((p)>>12)&0xf)	/* bits 15:12, #companion HCs */
-#define HCS_N_PCC(p)		(((p)>>8)&0xf)	/* bits 11:8, ports per CC */
-#define HCS_PORTROUTED(p)	((p)&(1 << 7))	/* true: port routing */
-#define HCS_PPC(p)		((p)&(1 << 4))	/* true: port power control */
-#define HCS_N_PORTS(p)		(((p)>>0)&0xf)	/* bits 3:0, ports on HC */
-
-	u32		hcc_params;      /* HCCPARAMS - offset 0x8 */
-#define HCC_EXT_CAPS(p)		(((p)>>8)&0xff)	/* for pci extended caps */
-#define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
-#define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
-#define HCC_CANPARK(p)		((p)&(1 << 2))  /* true: can park on async qh */
-#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1))  /* true: periodic_size changes*/
-#define HCC_64BIT_ADDR(p)       ((p)&(1))       /* true: can use 64-bit addr */
-	u8		portroute[8];	 /* nibbles for routing - offset 0xC */
-} __attribute__ ((packed));
-
-
-/* Section 2.3 Host Controller Operational Registers */
-struct ehci_regs {
-	/* USBCMD: offset 0x00 */
-	u32		command;
-/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
-#define CMD_PARK	(1<<11)		/* enable "park" on async qh */
-#define CMD_PARK_CNT(c)	(((c)>>8)&3)	/* how many transfers to park for */
-#define CMD_LRESET	(1<<7)		/* partial reset (no ports, etc) */
-#define CMD_IAAD	(1<<6)		/* "doorbell" interrupt async advance */
-#define CMD_ASE		(1<<5)		/* async schedule enable */
-#define CMD_PSE		(1<<4)		/* periodic schedule enable */
-/* 3:2 is periodic frame list size */
-#define CMD_RESET	(1<<1)		/* reset HC not bus */
-#define CMD_RUN		(1<<0)		/* start/stop HC */
-
-	/* USBSTS: offset 0x04 */
-	u32		status;
-#define STS_ASS		(1<<15)		/* Async Schedule Status */
-#define STS_PSS		(1<<14)		/* Periodic Schedule Status */
-#define STS_RECL	(1<<13)		/* Reclamation */
-#define STS_HALT	(1<<12)		/* Not running (any reason) */
-/* some bits reserved */
-	/* these STS_* flags are also intr_enable bits (USBINTR) */
-#define STS_IAA		(1<<5)		/* Interrupted on async advance */
-#define STS_FATAL	(1<<4)		/* such as some PCI access errors */
-#define STS_FLR		(1<<3)		/* frame list rolled over */
-#define STS_PCD		(1<<2)		/* port change detect */
-#define STS_ERR		(1<<1)		/* "error" completion (overflow, ...) */
-#define STS_INT		(1<<0)		/* "normal" completion (short, ...) */
-
-#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
-
-	/* USBINTR: offset 0x08 */
-	u32		intr_enable;
-
-	/* FRINDEX: offset 0x0C */
-	u32		frame_index;	/* current microframe number */
-	/* CTRLDSSEGMENT: offset 0x10 */
-	u32		segment;	/* address bits 63:32 if needed */
-	/* PERIODICLISTBASE: offset 0x14 */
-	u32		frame_list;	/* points to periodic list */
-	/* ASYNCLISTADDR: offset 0x18 */
-	u32		async_next;	/* address of next async queue head */
-
-	u32		reserved[9];
-
-	/* CONFIGFLAG: offset 0x40 */
-	u32		configured_flag;
-#define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */
-
-	/* PORTSC: offset 0x44 */
-	u32		port_status[0];	/* up to N_PORTS */
-/* 31:23 reserved */
-#define PORT_WKOC_E	(1<<22)		/* wake on overcurrent (enable) */
-#define PORT_WKDISC_E	(1<<21)		/* wake on disconnect (enable) */
-#define PORT_WKCONN_E	(1<<20)		/* wake on connect (enable) */
-/* 19:16 for port testing */
-#define PORT_LED_OFF	(0<<14)
-#define PORT_LED_AMBER	(1<<14)
-#define PORT_LED_GREEN	(2<<14)
-#define PORT_LED_MASK	(3<<14)
-#define PORT_OWNER	(1<<13)		/* true: companion hc owns this port */
-#define PORT_POWER	(1<<12)		/* true: has power (see PPC) */
-#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10))	/* USB 1.1 device */
-/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
-/* 9 reserved */
-#define PORT_RESET	(1<<8)		/* reset port */
-#define PORT_SUSPEND	(1<<7)		/* suspend port */
-#define PORT_RESUME	(1<<6)		/* resume it */
-#define PORT_OCC	(1<<5)		/* over current change */
-#define PORT_OC		(1<<4)		/* over current active */
-#define PORT_PEC	(1<<3)		/* port enable change */
-#define PORT_PE		(1<<2)		/* port enable */
-#define PORT_CSC	(1<<1)		/* connect status change */
-#define PORT_CONNECT	(1<<0)		/* device connected */
-#define PORT_RWC_BITS   (PORT_CSC | PORT_PEC | PORT_OCC)
-} __attribute__ ((packed));
-
-/* Appendix C, Debug port ... intended for use with special "debug devices"
- * that can help if there's no serial console.  (nonstandard enumeration.)
- */
-struct ehci_dbg_port {
-	u32	control;
-#define DBGP_OWNER	(1<<30)
-#define DBGP_ENABLED	(1<<28)
-#define DBGP_DONE	(1<<16)
-#define DBGP_INUSE	(1<<10)
-#define DBGP_ERRCODE(x)	(((x)>>7)&0x07)
-#	define DBGP_ERR_BAD	1
-#	define DBGP_ERR_SIGNAL	2
-#define DBGP_ERROR	(1<<6)
-#define DBGP_GO		(1<<5)
-#define DBGP_OUT	(1<<4)
-#define DBGP_LEN(x)	(((x)>>0)&0x0f)
-	u32	pids;
-#define DBGP_PID_GET(x)		(((x)>>16)&0xff)
-#define DBGP_PID_SET(data, tok)	(((data)<<8)|(tok))
-	u32	data03;
-	u32	data47;
-	u32	address;
-#define DBGP_EPADDR(dev, ep)	(((dev)<<8)|(ep))
-} __attribute__ ((packed));
-
-
-#define	QTD_NEXT(dma)	cpu_to_le32((u32)dma)
-
-/*
- * EHCI Specification 0.95 Section 3.5
- * QTD: describe data transfer components (buffer, direction, ...)
- * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
- *
- * These are associated only with "QH" (Queue Head) structures,
- * used with control, bulk, and interrupt transfers.
- */
-struct ehci_qtd {
-	/* first part defined by EHCI spec */
-	__le32			hw_next;		/* see EHCI 3.5.1 */
-	__le32			hw_alt_next;		/* see EHCI 3.5.2 */
-	__le32			hw_token;		/* see EHCI 3.5.3 */
-#define	QTD_TOGGLE	(1 << 31)	/* data toggle */
-#define	QTD_LENGTH(tok)	(((tok)>>16) & 0x7fff)
-#define	QTD_IOC		(1 << 15)	/* interrupt on complete */
-#define	QTD_CERR(tok)	(((tok)>>10) & 0x3)
-#define	QTD_PID(tok)	(((tok)>>8) & 0x3)
-#define	QTD_STS_ACTIVE	(1 << 7)	/* HC may execute this */
-#define	QTD_STS_HALT	(1 << 6)	/* halted on error */
-#define	QTD_STS_DBE	(1 << 5)	/* data buffer error (in HC) */
-#define	QTD_STS_BABBLE	(1 << 4)	/* device was babbling (qtd halted) */
-#define	QTD_STS_XACT	(1 << 3)	/* device gave illegal response */
-#define	QTD_STS_MMF	(1 << 2)	/* incomplete split transaction */
-#define	QTD_STS_STS	(1 << 1)	/* split transaction state */
-#define	QTD_STS_PING	(1 << 0)	/* issue PING? */
-	__le32			hw_buf[5];		/* see EHCI 3.5.4 */
-	__le32			hw_buf_hi[5];		/* Appendix B */
-
-	/* the rest is HCD-private */
-	dma_addr_t		qtd_dma;		/* qtd address */
-	struct list_head	qtd_list;		/* sw qtd list */
-	struct urb		*urb;			/* qtd's urb */
-	size_t			length;			/* length of buffer */
-
-	u32			qtd_buffer_len;
-	void			*buffer;
-	dma_addr_t		buffer_dma;
-	void			*transfer_buffer;
-	void			*transfer_dma;
-} __attribute__ ((aligned(32)));
-
-/* mask NakCnt+T in qh->hw_alt_next */
-#define QTD_MASK cpu_to_le32 (~0x1f)
-
-#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
-
-/* Type tag from {qh, itd, sitd, fstn}->hw_next */
-#define Q_NEXT_TYPE(dma) ((dma) & cpu_to_le32 (3 << 1))
-
-/* values for that type tag */
-#define Q_TYPE_QH	cpu_to_le32 (1 << 1)
-
-/* next async queue entry, or pointer to interrupt/periodic QH */
-#define	QH_NEXT(dma)	(cpu_to_le32(((u32)dma)&~0x01f)|Q_TYPE_QH)
-
-/* for periodic/async schedules and qtd lists, mark end of list */
-#define	EHCI_LIST_END	cpu_to_le32(1) /* "null pointer" to hw */
-
-/*
- * Entries in periodic shadow table are pointers to one of four kinds
- * of data structure.  That's dictated by the hardware; a type tag is
- * encoded in the low bits of the hardware's periodic schedule.  Use
- * Q_NEXT_TYPE to get the tag.
- *
- * For entries in the async schedule, the type tag always says "qh".
- */
-union ehci_shadow {
-	struct ehci_qh		*qh;		/* Q_TYPE_QH */
-	__le32			*hw_next;	/* (all types) */
-	void			*ptr;
-};
-
-/*
- * EHCI Specification 0.95 Section 3.6
- * QH: describes control/bulk/interrupt endpoints
- * See Fig 3-7 "Queue Head Structure Layout".
- *
- * These appear in both the async and (for interrupt) periodic schedules.
- */
-
-struct ehci_qh {
-	/* first part defined by EHCI spec */
-	__le32			hw_next;	 /* see EHCI 3.6.1 */
-	__le32			hw_info1;	/* see EHCI 3.6.2 */
-#define	QH_HEAD		0x00008000
-	__le32			hw_info2;	/* see EHCI 3.6.2 */
-#define	QH_SMASK	0x000000ff
-#define	QH_CMASK	0x0000ff00
-#define	QH_HUBADDR	0x007f0000
-#define	QH_HUBPORT	0x3f800000
-#define	QH_MULT		0xc0000000
-	__le32			hw_current;	 /* qtd list - see EHCI 3.6.4 */
-
-	/* qtd overlay (hardware parts of a struct ehci_qtd) */
-	__le32			hw_qtd_next;
-	__le32			hw_alt_next;
-	__le32			hw_token;
-	__le32			hw_buf[5];
-	__le32			hw_buf_hi[5];
-
-	/* the rest is HCD-private */
-	dma_addr_t		qh_dma;		/* address of qh */
-	union ehci_shadow	qh_next;	/* ptr to qh; or periodic */
-	struct list_head	qtd_list;	/* sw qtd list */
-	struct ehci_qtd		*dummy;
-	struct ehci_qh		*reclaim;	/* next to reclaim */
-
-	struct oxu_hcd		*oxu;
-	struct kref		kref;
-	unsigned		stamp;
-
-	u8			qh_state;
-#define	QH_STATE_LINKED		1		/* HC sees this */
-#define	QH_STATE_UNLINK		2		/* HC may still see this */
-#define	QH_STATE_IDLE		3		/* HC doesn't see this */
-#define	QH_STATE_UNLINK_WAIT	4		/* LINKED and on reclaim q */
-#define	QH_STATE_COMPLETING	5		/* don't touch token.HALT */
-
-	/* periodic schedule info */
-	u8			usecs;		/* intr bandwidth */
-	u8			gap_uf;		/* uframes split/csplit gap */
-	u8			c_usecs;	/* ... split completion bw */
-	u16			tt_usecs;	/* tt downstream bandwidth */
-	unsigned short		period;		/* polling interval */
-	unsigned short		start;		/* where polling starts */
-#define NO_FRAME ((unsigned short)~0)			/* pick new start */
-	struct usb_device	*dev;		/* access to TT */
-} __attribute__ ((aligned(32)));
-
-/*
- * Proper OXU210HP structs
- */
-
-#define OXU_OTG_CORE_OFFSET	0x00400
-#define OXU_OTG_CAP_OFFSET	(OXU_OTG_CORE_OFFSET + 0x100)
-#define OXU_SPH_CORE_OFFSET	0x00800
-#define OXU_SPH_CAP_OFFSET	(OXU_SPH_CORE_OFFSET + 0x100)
-
-#define OXU_OTG_MEM		0xE000
-#define OXU_SPH_MEM		0x16000
-
-/* Only how many elements & element structure are specifies here. */
-/* 2 host controllers are enabled - total size <= 28 kbytes */
-#define	DEFAULT_I_TDPS		1024
-#define QHEAD_NUM		16
-#define QTD_NUM			32
-#define SITD_NUM		8
-#define MURB_NUM		8
-
-#define BUFFER_NUM		8
-#define BUFFER_SIZE		512
-
-struct oxu_info {
-	struct usb_hcd *hcd[2];
-};
-
-struct oxu_buf {
-	u8			buffer[BUFFER_SIZE];
-} __attribute__ ((aligned(BUFFER_SIZE)));
-
-struct oxu_onchip_mem {
-	struct oxu_buf		db_pool[BUFFER_NUM];
-
-	u32			frame_list[DEFAULT_I_TDPS];
-	struct ehci_qh		qh_pool[QHEAD_NUM];
-	struct ehci_qtd		qtd_pool[QTD_NUM];
-} __attribute__ ((aligned(4 << 10)));
-
-#define	EHCI_MAX_ROOT_PORTS	15		/* see HCS_N_PORTS */
-
-struct oxu_murb {
-	struct urb		urb;
-	struct urb		*main;
-	u8			last;
-};
-
-struct oxu_hcd {				/* one per controller */
-	unsigned int		is_otg:1;
-
-	u8			qh_used[QHEAD_NUM];
-	u8			qtd_used[QTD_NUM];
-	u8			db_used[BUFFER_NUM];
-	u8			murb_used[MURB_NUM];
-
-	struct oxu_onchip_mem	__iomem *mem;
-	spinlock_t		mem_lock;
-
-	struct timer_list	urb_timer;
-
-	struct ehci_caps __iomem *caps;
-	struct ehci_regs __iomem *regs;
-
-	__u32			hcs_params;	/* cached register copy */
-	spinlock_t		lock;
-
-	/* async schedule support */
-	struct ehci_qh		*async;
-	struct ehci_qh		*reclaim;
-	unsigned		reclaim_ready:1;
-	unsigned		scanning:1;
-
-	/* periodic schedule support */
-	unsigned		periodic_size;
-	__le32			*periodic;	/* hw periodic table */
-	dma_addr_t		periodic_dma;
-	unsigned		i_thresh;	/* uframes HC might cache */
-
-	union ehci_shadow	*pshadow;	/* mirror hw periodic table */
-	int			next_uframe;	/* scan periodic, start here */
-	unsigned		periodic_sched;	/* periodic activity count */
-
-	/* per root hub port */
-	unsigned long		reset_done[EHCI_MAX_ROOT_PORTS];
-	/* bit vectors (one bit per port) */
-	unsigned long		bus_suspended;	/* which ports were
-						 * already suspended at the
-						 * start of a bus suspend
-						 */
-	unsigned long		companion_ports;/* which ports are dedicated
-						 * to the companion controller
-						 */
-
-	struct timer_list	watchdog;
-	unsigned long		actions;
-	unsigned		stamp;
-	unsigned long		next_statechange;
-	u32			command;
-
-	/* SILICON QUIRKS */
-	struct list_head	urb_list;	/* this is the head to urb
-						 * queue that didn't get enough
-						 * resources
-						 */
-	struct oxu_murb		*murb_pool;	/* murb per split big urb */
-	unsigned urb_len;
-
-	u8			sbrn;		/* packed release number */
-};
-
-#define EHCI_IAA_JIFFIES	(HZ/100)	/* arbitrary; ~10 msec */
-#define EHCI_IO_JIFFIES	 	(HZ/10)		/* io watchdog > irq_thresh */
-#define EHCI_ASYNC_JIFFIES      (HZ/20)		/* async idle timeout */
-#define EHCI_SHRINK_JIFFIES     (HZ/200)	/* async qh unlink delay */
-
-enum ehci_timer_action {
-	TIMER_IO_WATCHDOG,
-	TIMER_IAA_WATCHDOG,
-	TIMER_ASYNC_SHRINK,
-	TIMER_ASYNC_OFF,
-};
-
-#include <linux/oxu210hp.h>
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 42668aeca57c..0c03ac6b0213 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -2411,12 +2411,6 @@ static int r8a66597_probe(struct platform_device *pdev)
 	if (usb_disabled())
 		return -ENODEV;
 
-	if (pdev->dev.dma_mask) {
-		ret = -EINVAL;
-		dev_err(&pdev->dev, "dma not supported\n");
-		goto clean_up;
-	}
-
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		ret = -ENODEV;
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 5b061e599948..72a34a1eb618 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -1632,12 +1632,6 @@ sl811h_probe(struct platform_device *dev)
 	irq = ires->start;
 	irqflags = ires->flags & IRQF_TRIGGER_MASK;
 
-	/* refuse to confuse usbcore */
-	if (dev->dev.dma_mask) {
-		dev_dbg(&dev->dev, "no we won't dma\n");
-		return -EINVAL;
-	}
-
 	/* the chip may be wired for either kind of addressing */
 	addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	data = platform_get_resource(dev, IORESOURCE_MEM, 1);
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 400c40bc43a6..4efee34f154f 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -3077,8 +3077,6 @@ static int u132_probe(struct platform_device *pdev)
 	retval = ftdi_read_pcimem(pdev, roothub.a, &rh_a);
 	if (retval)
 		return retval;
-	if (pdev->dev.dma_mask)
-		return -EINVAL;
 
 	hcd = usb_create_hcd(&u132_hc_driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
diff --git a/drivers/usb/host/uhci-grlib.c b/drivers/usb/host/uhci-grlib.c
index 2103b1ed0f8f..0a201a73b196 100644
--- a/drivers/usb/host/uhci-grlib.c
+++ b/drivers/usb/host/uhci-grlib.c
@@ -63,7 +63,7 @@ static const struct hc_driver uhci_grlib_hc_driver = {
 
 	/* Generic hardware linkage */
 	.irq =			uhci_irq,
-	.flags =		HCD_MEMORY | HCD_USB11,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB11,
 
 	/* Basic lifecycle operations */
 	.reset =		uhci_grlib_init,
diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c
index 0dd944277c99..0fa3d72bae26 100644
--- a/drivers/usb/host/uhci-pci.c
+++ b/drivers/usb/host/uhci-pci.c
@@ -261,7 +261,7 @@ static const struct hc_driver uhci_driver = {
 
 	/* Generic hardware linkage */
 	.irq =			uhci_irq,
-	.flags =		HCD_USB11,
+	.flags =		HCD_DMA | HCD_USB11,
 
 	/* Basic lifecycle operations */
 	.reset =		uhci_pci_init,
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index 89700e26fb29..70dbd95c3f06 100644
--- a/drivers/usb/host/uhci-platform.c
+++ b/drivers/usb/host/uhci-platform.c
@@ -41,7 +41,7 @@ static const struct hc_driver uhci_platform_hc_driver = {
 
 	/* Generic hardware linkage */
 	.irq =			uhci_irq,
-	.flags =		HCD_MEMORY | HCD_USB11,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB11,
 
 	/* Basic lifecycle operations */
 	.reset =		uhci_platform_init,
diff --git a/drivers/usb/host/whci/Makefile b/drivers/usb/host/whci/Makefile
deleted file mode 100644
index 859d20079df6..000000000000
--- a/drivers/usb/host/whci/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_USB_WHCI_HCD) += whci-hcd.o
-
-whci-hcd-y := \
-	asl.o	\
-	debug.o \
-	hcd.o	\
-	hw.o	\
-	init.o	\
-	int.o	\
-	pzl.o	\
-	qset.o	\
-	wusb.o
diff --git a/drivers/usb/host/whci/asl.c b/drivers/usb/host/whci/asl.c
deleted file mode 100644
index 276fb34c8efd..000000000000
--- a/drivers/usb/host/whci/asl.c
+++ /dev/null
@@ -1,376 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) asynchronous schedule management.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/dma-mapping.h>
-#include <linux/uwb/umc.h>
-#include <linux/usb.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-static void qset_get_next_prev(struct whc *whc, struct whc_qset *qset,
-			       struct whc_qset **next, struct whc_qset **prev)
-{
-	struct list_head *n, *p;
-
-	BUG_ON(list_empty(&whc->async_list));
-
-	n = qset->list_node.next;
-	if (n == &whc->async_list)
-		n = n->next;
-	p = qset->list_node.prev;
-	if (p == &whc->async_list)
-		p = p->prev;
-
-	*next = container_of(n, struct whc_qset, list_node);
-	*prev = container_of(p, struct whc_qset, list_node);
-
-}
-
-static void asl_qset_insert_begin(struct whc *whc, struct whc_qset *qset)
-{
-	list_move(&qset->list_node, &whc->async_list);
-	qset->in_sw_list = true;
-}
-
-static void asl_qset_insert(struct whc *whc, struct whc_qset *qset)
-{
-	struct whc_qset *next, *prev;
-
-	qset_clear(whc, qset);
-
-	/* Link into ASL. */
-	qset_get_next_prev(whc, qset, &next, &prev);
-	whc_qset_set_link_ptr(&qset->qh.link, next->qset_dma);
-	whc_qset_set_link_ptr(&prev->qh.link, qset->qset_dma);
-	qset->in_hw_list = true;
-}
-
-static void asl_qset_remove(struct whc *whc, struct whc_qset *qset)
-{
-	struct whc_qset *prev, *next;
-
-	qset_get_next_prev(whc, qset, &next, &prev);
-
-	list_move(&qset->list_node, &whc->async_removed_list);
-	qset->in_sw_list = false;
-
-	/*
-	 * No more qsets in the ASL?  The caller must stop the ASL as
-	 * it's no longer valid.
-	 */
-	if (list_empty(&whc->async_list))
-		return;
-
-	/* Remove from ASL. */
-	whc_qset_set_link_ptr(&prev->qh.link, next->qset_dma);
-	qset->in_hw_list = false;
-}
-
-/**
- * process_qset - process any recently inactivated or halted qTDs in a
- * qset.
- *
- * After inactive qTDs are removed, new qTDs can be added if the
- * urb queue still contains URBs.
- *
- * Returns any additional WUSBCMD bits for the ASL sync command (i.e.,
- * WUSBCMD_ASYNC_QSET_RM if a halted qset was removed).
- */
-static uint32_t process_qset(struct whc *whc, struct whc_qset *qset)
-{
-	enum whc_update update = 0;
-	uint32_t status = 0;
-
-	while (qset->ntds) {
-		struct whc_qtd *td;
-
-		td = &qset->qtd[qset->td_start];
-		status = le32_to_cpu(td->status);
-
-		/*
-		 * Nothing to do with a still active qTD.
-		 */
-		if (status & QTD_STS_ACTIVE)
-			break;
-
-		if (status & QTD_STS_HALTED) {
-			/* Ug, an error. */
-			process_halted_qtd(whc, qset, td);
-			/* A halted qTD always triggers an update
-			   because the qset was either removed or
-			   reactivated. */
-			update |= WHC_UPDATE_UPDATED;
-			goto done;
-		}
-
-		/* Mmm, a completed qTD. */
-		process_inactive_qtd(whc, qset, td);
-	}
-
-	if (!qset->remove)
-		update |= qset_add_qtds(whc, qset);
-
-done:
-	/*
-	 * Remove this qset from the ASL if requested, but only if has
-	 * no qTDs.
-	 */
-	if (qset->remove && qset->ntds == 0) {
-		asl_qset_remove(whc, qset);
-		update |= WHC_UPDATE_REMOVED;
-	}
-	return update;
-}
-
-void asl_start(struct whc *whc)
-{
-	struct whc_qset *qset;
-
-	qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
-
-	le_writeq(qset->qset_dma | QH_LINK_NTDS(8), whc->base + WUSBASYNCLISTADDR);
-
-	whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, WUSBCMD_ASYNC_EN);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
-		      WUSBSTS_ASYNC_SCHED, WUSBSTS_ASYNC_SCHED,
-		      1000, "start ASL");
-}
-
-void asl_stop(struct whc *whc)
-{
-	whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, 0);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
-		      WUSBSTS_ASYNC_SCHED, 0,
-		      1000, "stop ASL");
-}
-
-/**
- * asl_update - request an ASL update and wait for the hardware to be synced
- * @whc: the WHCI HC
- * @wusbcmd: WUSBCMD value to start the update.
- *
- * If the WUSB HC is inactive (i.e., the ASL is stopped) then the
- * update must be skipped as the hardware may not respond to update
- * requests.
- */
-void asl_update(struct whc *whc, uint32_t wusbcmd)
-{
-	struct wusbhc *wusbhc = &whc->wusbhc;
-	long t;
-
-	mutex_lock(&wusbhc->mutex);
-	if (wusbhc->active) {
-		whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
-		t = wait_event_timeout(
-			whc->async_list_wq,
-			(le_readl(whc->base + WUSBCMD) & WUSBCMD_ASYNC_UPDATED) == 0,
-			msecs_to_jiffies(1000));
-		if (t == 0)
-			whc_hw_error(whc, "ASL update timeout");
-	}
-	mutex_unlock(&wusbhc->mutex);
-}
-
-/**
- * scan_async_work - scan the ASL for qsets to process.
- *
- * Process each qset in the ASL in turn and then signal the WHC that
- * the ASL has been updated.
- *
- * Then start, stop or update the asynchronous schedule as required.
- */
-void scan_async_work(struct work_struct *work)
-{
-	struct whc *whc = container_of(work, struct whc, async_work);
-	struct whc_qset *qset, *t;
-	enum whc_update update = 0;
-
-	spin_lock_irq(&whc->lock);
-
-	/*
-	 * Transerve the software list backwards so new qsets can be
-	 * safely inserted into the ASL without making it non-circular.
-	 */
-	list_for_each_entry_safe_reverse(qset, t, &whc->async_list, list_node) {
-		if (!qset->in_hw_list) {
-			asl_qset_insert(whc, qset);
-			update |= WHC_UPDATE_ADDED;
-		}
-
-		update |= process_qset(whc, qset);
-	}
-
-	spin_unlock_irq(&whc->lock);
-
-	if (update) {
-		uint32_t wusbcmd = WUSBCMD_ASYNC_UPDATED | WUSBCMD_ASYNC_SYNCED_DB;
-		if (update & WHC_UPDATE_REMOVED)
-			wusbcmd |= WUSBCMD_ASYNC_QSET_RM;
-		asl_update(whc, wusbcmd);
-	}
-
-	/*
-	 * Now that the ASL is updated, complete the removal of any
-	 * removed qsets.
-	 *
-	 * If the qset was to be reset, do so and reinsert it into the
-	 * ASL if it has pending transfers.
-	 */
-	spin_lock_irq(&whc->lock);
-
-	list_for_each_entry_safe(qset, t, &whc->async_removed_list, list_node) {
-		qset_remove_complete(whc, qset);
-		if (qset->reset) {
-			qset_reset(whc, qset);
-			if (!list_empty(&qset->stds)) {
-				asl_qset_insert_begin(whc, qset);
-				queue_work(whc->workqueue, &whc->async_work);
-			}
-		}
-	}
-
-	spin_unlock_irq(&whc->lock);
-}
-
-/**
- * asl_urb_enqueue - queue an URB onto the asynchronous list (ASL).
- * @whc: the WHCI host controller
- * @urb: the URB to enqueue
- * @mem_flags: flags for any memory allocations
- *
- * The qset for the endpoint is obtained and the urb queued on to it.
- *
- * Work is scheduled to update the hardware's view of the ASL.
- */
-int asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
-{
-	struct whc_qset *qset;
-	int err;
-	unsigned long flags;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
-	if (err < 0) {
-		spin_unlock_irqrestore(&whc->lock, flags);
-		return err;
-	}
-
-	qset = get_qset(whc, urb, GFP_ATOMIC);
-	if (qset == NULL)
-		err = -ENOMEM;
-	else
-		err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
-	if (!err) {
-		if (!qset->in_sw_list && !qset->remove)
-			asl_qset_insert_begin(whc, qset);
-	} else
-		usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb);
-
-	spin_unlock_irqrestore(&whc->lock, flags);
-
-	if (!err)
-		queue_work(whc->workqueue, &whc->async_work);
-
-	return err;
-}
-
-/**
- * asl_urb_dequeue - remove an URB (qset) from the async list.
- * @whc: the WHCI host controller
- * @urb: the URB to dequeue
- * @status: the current status of the URB
- *
- * URBs that do yet have qTDs can simply be removed from the software
- * queue, otherwise the qset must be removed from the ASL so the qTDs
- * can be removed.
- */
-int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
-{
-	struct whc_urb *wurb = urb->hcpriv;
-	struct whc_qset *qset = wurb->qset;
-	struct whc_std *std, *t;
-	bool has_qtd = false;
-	int ret;
-	unsigned long flags;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
-	if (ret < 0)
-		goto out;
-
-	list_for_each_entry_safe(std, t, &qset->stds, list_node) {
-		if (std->urb == urb) {
-			if (std->qtd)
-				has_qtd = true;
-			qset_free_std(whc, std);
-		} else
-			std->qtd = NULL; /* so this std is re-added when the qset is */
-	}
-
-	if (has_qtd) {
-		asl_qset_remove(whc, qset);
-		wurb->status = status;
-		wurb->is_async = true;
-		queue_work(whc->workqueue, &wurb->dequeue_work);
-	} else
-		qset_remove_urb(whc, qset, urb, status);
-out:
-	spin_unlock_irqrestore(&whc->lock, flags);
-
-	return ret;
-}
-
-/**
- * asl_qset_delete - delete a qset from the ASL
- */
-void asl_qset_delete(struct whc *whc, struct whc_qset *qset)
-{
-	qset->remove = 1;
-	queue_work(whc->workqueue, &whc->async_work);
-	qset_delete(whc, qset);
-}
-
-/**
- * asl_init - initialize the asynchronous schedule list
- *
- * A dummy qset with no qTDs is added to the ASL to simplify removing
- * qsets (no need to stop the ASL when the last qset is removed).
- */
-int asl_init(struct whc *whc)
-{
-	struct whc_qset *qset;
-
-	qset = qset_alloc(whc, GFP_KERNEL);
-	if (qset == NULL)
-		return -ENOMEM;
-
-	asl_qset_insert_begin(whc, qset);
-	asl_qset_insert(whc, qset);
-
-	return 0;
-}
-
-/**
- * asl_clean_up - free ASL resources
- *
- * The ASL is stopped and empty except for the dummy qset.
- */
-void asl_clean_up(struct whc *whc)
-{
-	struct whc_qset *qset;
-
-	if (!list_empty(&whc->async_list)) {
-		qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
-		list_del(&qset->list_node);
-		qset_free(whc, qset);
-	}
-}
diff --git a/drivers/usb/host/whci/debug.c b/drivers/usb/host/whci/debug.c
deleted file mode 100644
index 8ddfe3f1f693..000000000000
--- a/drivers/usb/host/whci/debug.c
+++ /dev/null
@@ -1,153 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) debug.
- *
- * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
- */
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/export.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-struct whc_dbg {
-	struct dentry *di_f;
-	struct dentry *asl_f;
-	struct dentry *pzl_f;
-};
-
-static void qset_print(struct seq_file *s, struct whc_qset *qset)
-{
-	static const char *qh_type[] = {
-		"ctrl", "isoc", "bulk", "intr", "rsvd", "rsvd", "rsvd", "lpintr", };
-	struct whc_std *std;
-	struct urb *urb = NULL;
-	int i;
-
-	seq_printf(s, "qset %08x", (u32)qset->qset_dma);
-	if (&qset->list_node == qset->whc->async_list.prev) {
-		seq_printf(s, " (dummy)\n");
-	} else {
-		seq_printf(s, " ep%d%s-%s maxpkt: %d\n",
-			   qset->qh.info1 & 0x0f,
-			   (qset->qh.info1 >> 4) & 0x1 ? "in" : "out",
-			   qh_type[(qset->qh.info1 >> 5) & 0x7],
-			   (qset->qh.info1 >> 16) & 0xffff);
-	}
-	seq_printf(s, "  -> %08x\n", (u32)qset->qh.link);
-	seq_printf(s, "  info: %08x %08x %08x\n",
-		   qset->qh.info1, qset->qh.info2,  qset->qh.info3);
-	seq_printf(s, "  sts: %04x errs: %d curwin: %08x\n",
-		   qset->qh.status, qset->qh.err_count, qset->qh.cur_window);
-	seq_printf(s, "  TD: sts: %08x opts: %08x\n",
-		   qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
-
-	for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
-		seq_printf(s, "  %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
-			i == qset->td_start ? 'S' : ' ',
-			i == qset->td_end ? 'E' : ' ',
-			i, qset->qtd[i].status, qset->qtd[i].options,
-			(u32)qset->qtd[i].page_list_ptr);
-	}
-	seq_printf(s, "  ntds: %d\n", qset->ntds);
-	list_for_each_entry(std, &qset->stds, list_node) {
-		if (urb != std->urb) {
-			urb = std->urb;
-			seq_printf(s, "  urb %p transferred: %d bytes\n", urb,
-				urb->actual_length);
-		}
-		if (std->qtd)
-			seq_printf(s, "    sTD[%td]: %zu bytes @ %08x\n",
-				std->qtd - &qset->qtd[0],
-				std->len, std->num_pointers ?
-				(u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
-		else
-			seq_printf(s, "    sTD[-]: %zd bytes @ %08x\n",
-				std->len, std->num_pointers ?
-				(u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
-	}
-}
-
-static int di_show(struct seq_file *s, void *p)
-{
-	struct whc *whc = s->private;
-	int d;
-
-	for (d = 0; d < whc->n_devices; d++) {
-		struct di_buf_entry *di = &whc->di_buf[d];
-
-		seq_printf(s, "DI[%d]\n", d);
-		seq_printf(s, "  availability: %*pb\n",
-			   UWB_NUM_MAS, (unsigned long *)di->availability_info);
-		seq_printf(s, "  %c%c key idx: %d dev addr: %d\n",
-			   (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
-			   (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
-			   (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
-			   (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
-	}
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(di);
-
-static int asl_show(struct seq_file *s, void *p)
-{
-	struct whc *whc = s->private;
-	struct whc_qset *qset;
-
-	list_for_each_entry(qset, &whc->async_list, list_node) {
-		qset_print(s, qset);
-	}
-
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(asl);
-
-static int pzl_show(struct seq_file *s, void *p)
-{
-	struct whc *whc = s->private;
-	struct whc_qset *qset;
-	int period;
-
-	for (period = 0; period < 5; period++) {
-		seq_printf(s, "Period %d\n", period);
-		list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
-			qset_print(s, qset);
-		}
-	}
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(pzl);
-
-void whc_dbg_init(struct whc *whc)
-{
-	if (whc->wusbhc.pal.debugfs_dir == NULL)
-		return;
-
-	whc->dbg = kzalloc(sizeof(struct whc_dbg), GFP_KERNEL);
-	if (whc->dbg == NULL)
-		return;
-
-	whc->dbg->di_f = debugfs_create_file("di", 0444,
-					      whc->wusbhc.pal.debugfs_dir, whc,
-					      &di_fops);
-	whc->dbg->asl_f = debugfs_create_file("asl", 0444,
-					      whc->wusbhc.pal.debugfs_dir, whc,
-					      &asl_fops);
-	whc->dbg->pzl_f = debugfs_create_file("pzl", 0444,
-					      whc->wusbhc.pal.debugfs_dir, whc,
-					      &pzl_fops);
-}
-
-void whc_dbg_clean_up(struct whc *whc)
-{
-	if (whc->dbg) {
-		debugfs_remove(whc->dbg->pzl_f);
-		debugfs_remove(whc->dbg->asl_f);
-		debugfs_remove(whc->dbg->di_f);
-		kfree(whc->dbg);
-	}
-}
diff --git a/drivers/usb/host/whci/hcd.c b/drivers/usb/host/whci/hcd.c
deleted file mode 100644
index 8af9dcfea127..000000000000
--- a/drivers/usb/host/whci/hcd.c
+++ /dev/null
@@ -1,356 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) driver.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/uwb/umc.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-/*
- * One time initialization.
- *
- * Nothing to do here.
- */
-static int whc_reset(struct usb_hcd *usb_hcd)
-{
-	return 0;
-}
-
-/*
- * Start the wireless host controller.
- *
- * Start device notification.
- *
- * Put hc into run state, set DNTS parameters.
- */
-static int whc_start(struct usb_hcd *usb_hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u8 bcid;
-	int ret;
-
-	mutex_lock(&wusbhc->mutex);
-
-	le_writel(WUSBINTR_GEN_CMD_DONE
-		  | WUSBINTR_HOST_ERR
-		  | WUSBINTR_ASYNC_SCHED_SYNCED
-		  | WUSBINTR_DNTS_INT
-		  | WUSBINTR_ERR_INT
-		  | WUSBINTR_INT,
-		  whc->base + WUSBINTR);
-
-	/* set cluster ID */
-	bcid = wusb_cluster_id_get();
-	ret = whc_set_cluster_id(whc, bcid);
-	if (ret < 0)
-		goto out;
-	wusbhc->cluster_id = bcid;
-
-	/* start HC */
-	whc_write_wusbcmd(whc, WUSBCMD_RUN, WUSBCMD_RUN);
-
-	usb_hcd->uses_new_polling = 1;
-	set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
-	usb_hcd->state = HC_STATE_RUNNING;
-
-out:
-	mutex_unlock(&wusbhc->mutex);
-	return ret;
-}
-
-
-/*
- * Stop the wireless host controller.
- *
- * Stop device notification.
- *
- * Wait for pending transfer to stop? Put hc into stop state?
- */
-static void whc_stop(struct usb_hcd *usb_hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-
-	mutex_lock(&wusbhc->mutex);
-
-	/* stop HC */
-	le_writel(0, whc->base + WUSBINTR);
-	whc_write_wusbcmd(whc, WUSBCMD_RUN, 0);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
-		      WUSBSTS_HCHALTED, WUSBSTS_HCHALTED,
-		      100, "HC to halt");
-
-	wusb_cluster_id_put(wusbhc->cluster_id);
-
-	mutex_unlock(&wusbhc->mutex);
-}
-
-static int whc_get_frame_number(struct usb_hcd *usb_hcd)
-{
-	/* Frame numbers are not applicable to WUSB. */
-	return -ENOSYS;
-}
-
-
-/*
- * Queue an URB to the ASL or PZL
- */
-static int whc_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
-			   gfp_t mem_flags)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	int ret;
-
-	switch (usb_pipetype(urb->pipe)) {
-	case PIPE_INTERRUPT:
-		ret = pzl_urb_enqueue(whc, urb, mem_flags);
-		break;
-	case PIPE_ISOCHRONOUS:
-		dev_err(&whc->umc->dev, "isochronous transfers unsupported\n");
-		ret = -ENOTSUPP;
-		break;
-	case PIPE_CONTROL:
-	case PIPE_BULK:
-	default:
-		ret = asl_urb_enqueue(whc, urb, mem_flags);
-		break;
-	}
-
-	return ret;
-}
-
-/*
- * Remove a queued URB from the ASL or PZL.
- */
-static int whc_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb, int status)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	int ret;
-
-	switch (usb_pipetype(urb->pipe)) {
-	case PIPE_INTERRUPT:
-		ret = pzl_urb_dequeue(whc, urb, status);
-		break;
-	case PIPE_ISOCHRONOUS:
-		ret = -ENOTSUPP;
-		break;
-	case PIPE_CONTROL:
-	case PIPE_BULK:
-	default:
-		ret = asl_urb_dequeue(whc, urb, status);
-		break;
-	}
-
-	return ret;
-}
-
-/*
- * Wait for all URBs to the endpoint to be completed, then delete the
- * qset.
- */
-static void whc_endpoint_disable(struct usb_hcd *usb_hcd,
-				 struct usb_host_endpoint *ep)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	struct whc_qset *qset;
-
-	qset = ep->hcpriv;
-	if (qset) {
-		ep->hcpriv = NULL;
-		if (usb_endpoint_xfer_bulk(&ep->desc)
-		    || usb_endpoint_xfer_control(&ep->desc))
-			asl_qset_delete(whc, qset);
-		else
-			pzl_qset_delete(whc, qset);
-	}
-}
-
-static void whc_endpoint_reset(struct usb_hcd *usb_hcd,
-			       struct usb_host_endpoint *ep)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	struct whc_qset *qset;
-	unsigned long flags;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	qset = ep->hcpriv;
-	if (qset) {
-		qset->remove = 1;
-		qset->reset = 1;
-
-		if (usb_endpoint_xfer_bulk(&ep->desc)
-		    || usb_endpoint_xfer_control(&ep->desc))
-			queue_work(whc->workqueue, &whc->async_work);
-		else
-			queue_work(whc->workqueue, &whc->periodic_work);
-	}
-
-	spin_unlock_irqrestore(&whc->lock, flags);
-}
-
-
-static const struct hc_driver whc_hc_driver = {
-	.description = "whci-hcd",
-	.product_desc = "Wireless host controller",
-	.hcd_priv_size = sizeof(struct whc) - sizeof(struct usb_hcd),
-	.irq = whc_int_handler,
-	.flags = HCD_USB2,
-
-	.reset = whc_reset,
-	.start = whc_start,
-	.stop = whc_stop,
-	.get_frame_number = whc_get_frame_number,
-	.urb_enqueue = whc_urb_enqueue,
-	.urb_dequeue = whc_urb_dequeue,
-	.endpoint_disable = whc_endpoint_disable,
-	.endpoint_reset = whc_endpoint_reset,
-
-	.hub_status_data = wusbhc_rh_status_data,
-	.hub_control = wusbhc_rh_control,
-	.start_port_reset = wusbhc_rh_start_port_reset,
-};
-
-static int whc_probe(struct umc_dev *umc)
-{
-	int ret;
-	struct usb_hcd *usb_hcd;
-	struct wusbhc *wusbhc;
-	struct whc *whc;
-	struct device *dev = &umc->dev;
-
-	usb_hcd = usb_create_hcd(&whc_hc_driver, dev, "whci");
-	if (usb_hcd == NULL) {
-		dev_err(dev, "unable to create hcd\n");
-		return -ENOMEM;
-	}
-
-	usb_hcd->wireless = 1;
-	usb_hcd->self.sg_tablesize = 2048; /* somewhat arbitrary */
-
-	wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	whc = wusbhc_to_whc(wusbhc);
-	whc->umc = umc;
-
-	ret = whc_init(whc);
-	if (ret)
-		goto error_whc_init;
-
-	wusbhc->dev = dev;
-	wusbhc->uwb_rc = uwb_rc_get_by_grandpa(umc->dev.parent);
-	if (!wusbhc->uwb_rc) {
-		ret = -ENODEV;
-		dev_err(dev, "cannot get radio controller\n");
-		goto error_uwb_rc;
-	}
-
-	if (whc->n_devices > USB_MAXCHILDREN) {
-		dev_warn(dev, "USB_MAXCHILDREN too low for WUSB adapter (%u ports)\n",
-			 whc->n_devices);
-		wusbhc->ports_max = USB_MAXCHILDREN;
-	} else
-		wusbhc->ports_max = whc->n_devices;
-	wusbhc->mmcies_max      = whc->n_mmc_ies;
-	wusbhc->start           = whc_wusbhc_start;
-	wusbhc->stop            = whc_wusbhc_stop;
-	wusbhc->mmcie_add       = whc_mmcie_add;
-	wusbhc->mmcie_rm        = whc_mmcie_rm;
-	wusbhc->dev_info_set    = whc_dev_info_set;
-	wusbhc->bwa_set         = whc_bwa_set;
-	wusbhc->set_num_dnts    = whc_set_num_dnts;
-	wusbhc->set_ptk         = whc_set_ptk;
-	wusbhc->set_gtk         = whc_set_gtk;
-
-	ret = wusbhc_create(wusbhc);
-	if (ret)
-		goto error_wusbhc_create;
-
-	ret = usb_add_hcd(usb_hcd, whc->umc->irq, IRQF_SHARED);
-	if (ret) {
-		dev_err(dev, "cannot add HCD: %d\n", ret);
-		goto error_usb_add_hcd;
-	}
-	device_wakeup_enable(usb_hcd->self.controller);
-
-	ret = wusbhc_b_create(wusbhc);
-	if (ret) {
-		dev_err(dev, "WUSBHC phase B setup failed: %d\n", ret);
-		goto error_wusbhc_b_create;
-	}
-
-	whc_dbg_init(whc);
-
-	return 0;
-
-error_wusbhc_b_create:
-	usb_remove_hcd(usb_hcd);
-error_usb_add_hcd:
-	wusbhc_destroy(wusbhc);
-error_wusbhc_create:
-	uwb_rc_put(wusbhc->uwb_rc);
-error_uwb_rc:
-	whc_clean_up(whc);
-error_whc_init:
-	usb_put_hcd(usb_hcd);
-	return ret;
-}
-
-
-static void whc_remove(struct umc_dev *umc)
-{
-	struct usb_hcd *usb_hcd = dev_get_drvdata(&umc->dev);
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-
-	if (usb_hcd) {
-		whc_dbg_clean_up(whc);
-		wusbhc_b_destroy(wusbhc);
-		usb_remove_hcd(usb_hcd);
-		wusbhc_destroy(wusbhc);
-		uwb_rc_put(wusbhc->uwb_rc);
-		whc_clean_up(whc);
-		usb_put_hcd(usb_hcd);
-	}
-}
-
-static struct umc_driver whci_hc_driver = {
-	.name =		"whci-hcd",
-	.cap_id =       UMC_CAP_ID_WHCI_WUSB_HC,
-	.probe =	whc_probe,
-	.remove =	whc_remove,
-};
-
-static int __init whci_hc_driver_init(void)
-{
-	return umc_driver_register(&whci_hc_driver);
-}
-module_init(whci_hc_driver_init);
-
-static void __exit whci_hc_driver_exit(void)
-{
-	umc_driver_unregister(&whci_hc_driver);
-}
-module_exit(whci_hc_driver_exit);
-
-/* PCI device ID's that we handle (so it gets loaded) */
-static struct pci_device_id __used whci_hcd_id_table[] = {
-	{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
-	{ /* empty last entry */ }
-};
-MODULE_DEVICE_TABLE(pci, whci_hcd_id_table);
-
-MODULE_DESCRIPTION("WHCI Wireless USB host controller driver");
-MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
-MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/whci/hw.c b/drivers/usb/host/whci/hw.c
deleted file mode 100644
index 22b3b7f7419d..000000000000
--- a/drivers/usb/host/whci/hw.c
+++ /dev/null
@@ -1,93 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) hardware access helpers.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/dma-mapping.h>
-#include <linux/uwb/umc.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val)
-{
-	unsigned long flags;
-	u32 cmd;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	cmd = le_readl(whc->base + WUSBCMD);
-	cmd = (cmd & ~mask) | val;
-	le_writel(cmd, whc->base + WUSBCMD);
-
-	spin_unlock_irqrestore(&whc->lock, flags);
-}
-
-/**
- * whc_do_gencmd - start a generic command via the WUSBGENCMDSTS register
- * @whc:    the WHCI HC
- * @cmd:    command to start.
- * @params: parameters for the command (the WUSBGENCMDPARAMS register value).
- * @addr:   pointer to any data for the command (may be NULL).
- * @len:    length of the data (if any).
- */
-int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len)
-{
-	unsigned long flags;
-	dma_addr_t dma_addr;
-	int t;
-	int ret = 0;
-
-	mutex_lock(&whc->mutex);
-
-	/* Wait for previous command to complete. */
-	t = wait_event_timeout(whc->cmd_wq,
-			       (le_readl(whc->base + WUSBGENCMDSTS) & WUSBGENCMDSTS_ACTIVE) == 0,
-			       WHC_GENCMD_TIMEOUT_MS);
-	if (t == 0) {
-		dev_err(&whc->umc->dev, "generic command timeout (%04x/%04x)\n",
-			le_readl(whc->base + WUSBGENCMDSTS),
-			le_readl(whc->base + WUSBGENCMDPARAMS));
-		ret = -ETIMEDOUT;
-		goto out;
-	}
-
-	if (addr) {
-		memcpy(whc->gen_cmd_buf, addr, len);
-		dma_addr = whc->gen_cmd_buf_dma;
-	} else
-		dma_addr = 0;
-
-	/* Poke registers to start cmd. */
-	spin_lock_irqsave(&whc->lock, flags);
-
-	le_writel(params, whc->base + WUSBGENCMDPARAMS);
-	le_writeq(dma_addr, whc->base + WUSBGENADDR);
-
-	le_writel(WUSBGENCMDSTS_ACTIVE | WUSBGENCMDSTS_IOC | cmd,
-		  whc->base + WUSBGENCMDSTS);
-
-	spin_unlock_irqrestore(&whc->lock, flags);
-out:
-	mutex_unlock(&whc->mutex);
-
-	return ret;
-}
-
-/**
- * whc_hw_error - recover from a hardware error
- * @whc:    the WHCI HC that broke.
- * @reason: a description of the failure.
- *
- * Recover from broken hardware with a full reset.
- */
-void whc_hw_error(struct whc *whc, const char *reason)
-{
-	struct wusbhc *wusbhc = &whc->wusbhc;
-
-	dev_err(&whc->umc->dev, "hardware error: %s\n", reason);
-	wusbhc_reset_all(wusbhc);
-}
diff --git a/drivers/usb/host/whci/init.c b/drivers/usb/host/whci/init.c
deleted file mode 100644
index 82416973f773..000000000000
--- a/drivers/usb/host/whci/init.c
+++ /dev/null
@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) initialization.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/dma-mapping.h>
-#include <linux/uwb/umc.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-/*
- * Reset the host controller.
- */
-static void whc_hw_reset(struct whc *whc)
-{
-	le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0,
-		      100, "reset");
-}
-
-static void whc_hw_init_di_buf(struct whc *whc)
-{
-	int d;
-
-	/* Disable all entries in the Device Information buffer. */
-	for (d = 0; d < whc->n_devices; d++)
-		whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE;
-
-	le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR);
-}
-
-static void whc_hw_init_dn_buf(struct whc *whc)
-{
-	/* Clear the Device Notification buffer to ensure the V (valid)
-	 * bits are clear.  */
-	memset(whc->dn_buf, 0, 4096);
-
-	le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR);
-}
-
-int whc_init(struct whc *whc)
-{
-	u32 whcsparams;
-	int ret, i;
-	resource_size_t start, len;
-
-	spin_lock_init(&whc->lock);
-	mutex_init(&whc->mutex);
-	init_waitqueue_head(&whc->cmd_wq);
-	init_waitqueue_head(&whc->async_list_wq);
-	init_waitqueue_head(&whc->periodic_list_wq);
-	whc->workqueue = alloc_ordered_workqueue(dev_name(&whc->umc->dev), 0);
-	if (whc->workqueue == NULL) {
-		ret = -ENOMEM;
-		goto error;
-	}
-	INIT_WORK(&whc->dn_work, whc_dn_work);
-
-	INIT_WORK(&whc->async_work, scan_async_work);
-	INIT_LIST_HEAD(&whc->async_list);
-	INIT_LIST_HEAD(&whc->async_removed_list);
-
-	INIT_WORK(&whc->periodic_work, scan_periodic_work);
-	for (i = 0; i < 5; i++)
-		INIT_LIST_HEAD(&whc->periodic_list[i]);
-	INIT_LIST_HEAD(&whc->periodic_removed_list);
-
-	/* Map HC registers. */
-	start = whc->umc->resource.start;
-	len   = whc->umc->resource.end - start + 1;
-	if (!request_mem_region(start, len, "whci-hc")) {
-		dev_err(&whc->umc->dev, "can't request HC region\n");
-		ret = -EBUSY;
-		goto error;
-	}
-	whc->base_phys = start;
-	whc->base = ioremap(start, len);
-	if (!whc->base) {
-		dev_err(&whc->umc->dev, "ioremap\n");
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	whc_hw_reset(whc);
-
-	/* Read maximum number of devices, keys and MMC IEs. */
-	whcsparams = le_readl(whc->base + WHCSPARAMS);
-	whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams);
-	whc->n_keys    = WHCSPARAMS_TO_N_KEYS(whcsparams);
-	whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams);
-
-	dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n",
-		whc->n_devices, whc->n_keys, whc->n_mmc_ies);
-
-	whc->qset_pool = dma_pool_create("qset", &whc->umc->dev,
-					 sizeof(struct whc_qset), 64, 0);
-	if (whc->qset_pool == NULL) {
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	ret = asl_init(whc);
-	if (ret < 0)
-		goto error;
-	ret = pzl_init(whc);
-	if (ret < 0)
-		goto error;
-
-	/* Allocate and initialize a buffer for generic commands, the
-	   Device Information buffer, and the Device Notification
-	   buffer. */
-
-	whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
-					      &whc->gen_cmd_buf_dma, GFP_KERNEL);
-	if (whc->gen_cmd_buf == NULL) {
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	whc->dn_buf = dma_alloc_coherent(&whc->umc->dev,
-					 sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
-					 &whc->dn_buf_dma, GFP_KERNEL);
-	if (!whc->dn_buf) {
-		ret = -ENOMEM;
-		goto error;
-	}
-	whc_hw_init_dn_buf(whc);
-
-	whc->di_buf = dma_alloc_coherent(&whc->umc->dev,
-					 sizeof(struct di_buf_entry) * whc->n_devices,
-					 &whc->di_buf_dma, GFP_KERNEL);
-	if (!whc->di_buf) {
-		ret = -ENOMEM;
-		goto error;
-	}
-	whc_hw_init_di_buf(whc);
-
-	return 0;
-
-error:
-	whc_clean_up(whc);
-	return ret;
-}
-
-void whc_clean_up(struct whc *whc)
-{
-	resource_size_t len;
-
-	if (whc->di_buf)
-		dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices,
-				  whc->di_buf, whc->di_buf_dma);
-	if (whc->dn_buf)
-		dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
-				  whc->dn_buf, whc->dn_buf_dma);
-	if (whc->gen_cmd_buf)
-		dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
-				  whc->gen_cmd_buf, whc->gen_cmd_buf_dma);
-
-	pzl_clean_up(whc);
-	asl_clean_up(whc);
-
-	dma_pool_destroy(whc->qset_pool);
-
-	len   = resource_size(&whc->umc->resource);
-	if (whc->base)
-		iounmap(whc->base);
-	if (whc->base_phys)
-		release_mem_region(whc->base_phys, len);
-
-	if (whc->workqueue)
-		destroy_workqueue(whc->workqueue);
-}
diff --git a/drivers/usb/host/whci/int.c b/drivers/usb/host/whci/int.c
deleted file mode 100644
index 7e4ad1b8f3e3..000000000000
--- a/drivers/usb/host/whci/int.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) interrupt handling.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/uwb/umc.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-static void transfer_done(struct whc *whc)
-{
-	queue_work(whc->workqueue, &whc->async_work);
-	queue_work(whc->workqueue, &whc->periodic_work);
-}
-
-irqreturn_t whc_int_handler(struct usb_hcd *hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u32 sts;
-
-	sts = le_readl(whc->base + WUSBSTS);
-	if (!(sts & WUSBSTS_INT_MASK))
-		return IRQ_NONE;
-	le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
-
-	if (sts & WUSBSTS_GEN_CMD_DONE)
-		wake_up(&whc->cmd_wq);
-
-	if (sts & WUSBSTS_HOST_ERR)
-		dev_err(&whc->umc->dev, "FIXME: host system error\n");
-
-	if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
-		wake_up(&whc->async_list_wq);
-
-	if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
-		wake_up(&whc->periodic_list_wq);
-
-	if (sts & WUSBSTS_DNTS_INT)
-		queue_work(whc->workqueue, &whc->dn_work);
-
-	/*
-	 * A transfer completed (see [WHCI] section 4.7.1.2 for when
-	 * this occurs).
-	 */
-	if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
-		transfer_done(whc);
-
-	return IRQ_HANDLED;
-}
-
-static int process_dn_buf(struct whc *whc)
-{
-	struct wusbhc *wusbhc = &whc->wusbhc;
-	struct dn_buf_entry *dn;
-	int processed = 0;
-
-	for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
-		if (dn->status & WHC_DN_STATUS_VALID) {
-			wusbhc_handle_dn(wusbhc, dn->src_addr,
-					 (struct wusb_dn_hdr *)dn->dn_data,
-					 dn->msg_size);
-			dn->status &= ~WHC_DN_STATUS_VALID;
-			processed++;
-		}
-	}
-	return processed;
-}
-
-void whc_dn_work(struct work_struct *work)
-{
-	struct whc *whc = container_of(work, struct whc, dn_work);
-	int processed;
-
-	do {
-		processed = process_dn_buf(whc);
-	} while (processed);
-}
diff --git a/drivers/usb/host/whci/pzl.c b/drivers/usb/host/whci/pzl.c
deleted file mode 100644
index ef52aeb02fde..000000000000
--- a/drivers/usb/host/whci/pzl.c
+++ /dev/null
@@ -1,404 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) periodic schedule management.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/dma-mapping.h>
-#include <linux/uwb/umc.h>
-#include <linux/usb.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-static void update_pzl_pointers(struct whc *whc, int period, u64 addr)
-{
-	switch (period) {
-	case 0:
-		whc_qset_set_link_ptr(&whc->pz_list[0], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[2], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[4], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[6], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[8], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[10], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[12], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[14], addr);
-		break;
-	case 1:
-		whc_qset_set_link_ptr(&whc->pz_list[1], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[5], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[9], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[13], addr);
-		break;
-	case 2:
-		whc_qset_set_link_ptr(&whc->pz_list[3], addr);
-		whc_qset_set_link_ptr(&whc->pz_list[11], addr);
-		break;
-	case 3:
-		whc_qset_set_link_ptr(&whc->pz_list[7], addr);
-		break;
-	case 4:
-		whc_qset_set_link_ptr(&whc->pz_list[15], addr);
-		break;
-	}
-}
-
-/*
- * Return the 'period' to use for this qset.  The minimum interval for
- * the endpoint is used so whatever urbs are submitted the device is
- * polled often enough.
- */
-static int qset_get_period(struct whc *whc, struct whc_qset *qset)
-{
-	uint8_t bInterval = qset->ep->desc.bInterval;
-
-	if (bInterval < 6)
-		bInterval = 6;
-	if (bInterval > 10)
-		bInterval = 10;
-	return bInterval - 6;
-}
-
-static void qset_insert_in_sw_list(struct whc *whc, struct whc_qset *qset)
-{
-	int period;
-
-	period = qset_get_period(whc, qset);
-
-	qset_clear(whc, qset);
-	list_move(&qset->list_node, &whc->periodic_list[period]);
-	qset->in_sw_list = true;
-}
-
-static void pzl_qset_remove(struct whc *whc, struct whc_qset *qset)
-{
-	list_move(&qset->list_node, &whc->periodic_removed_list);
-	qset->in_hw_list = false;
-	qset->in_sw_list = false;
-}
-
-/**
- * pzl_process_qset - process any recently inactivated or halted qTDs
- * in a qset.
- *
- * After inactive qTDs are removed, new qTDs can be added if the
- * urb queue still contains URBs.
- *
- * Returns the schedule updates required.
- */
-static enum whc_update pzl_process_qset(struct whc *whc, struct whc_qset *qset)
-{
-	enum whc_update update = 0;
-	uint32_t status = 0;
-
-	while (qset->ntds) {
-		struct whc_qtd *td;
-
-		td = &qset->qtd[qset->td_start];
-		status = le32_to_cpu(td->status);
-
-		/*
-		 * Nothing to do with a still active qTD.
-		 */
-		if (status & QTD_STS_ACTIVE)
-			break;
-
-		if (status & QTD_STS_HALTED) {
-			/* Ug, an error. */
-			process_halted_qtd(whc, qset, td);
-			/* A halted qTD always triggers an update
-			   because the qset was either removed or
-			   reactivated. */
-			update |= WHC_UPDATE_UPDATED;
-			goto done;
-		}
-
-		/* Mmm, a completed qTD. */
-		process_inactive_qtd(whc, qset, td);
-	}
-
-	if (!qset->remove)
-		update |= qset_add_qtds(whc, qset);
-
-done:
-	/*
-	 * If there are no qTDs in this qset, remove it from the PZL.
-	 */
-	if (qset->remove && qset->ntds == 0) {
-		pzl_qset_remove(whc, qset);
-		update |= WHC_UPDATE_REMOVED;
-	}
-
-	return update;
-}
-
-/**
- * pzl_start - start the periodic schedule
- * @whc: the WHCI host controller
- *
- * The PZL must be valid (e.g., all entries in the list should have
- * the T bit set).
- */
-void pzl_start(struct whc *whc)
-{
-	le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
-
-	whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, WUSBCMD_PERIODIC_EN);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
-		      WUSBSTS_PERIODIC_SCHED, WUSBSTS_PERIODIC_SCHED,
-		      1000, "start PZL");
-}
-
-/**
- * pzl_stop - stop the periodic schedule
- * @whc: the WHCI host controller
- */
-void pzl_stop(struct whc *whc)
-{
-	whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, 0);
-	whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
-		      WUSBSTS_PERIODIC_SCHED, 0,
-		      1000, "stop PZL");
-}
-
-/**
- * pzl_update - request a PZL update and wait for the hardware to be synced
- * @whc: the WHCI HC
- * @wusbcmd: WUSBCMD value to start the update.
- *
- * If the WUSB HC is inactive (i.e., the PZL is stopped) then the
- * update must be skipped as the hardware may not respond to update
- * requests.
- */
-void pzl_update(struct whc *whc, uint32_t wusbcmd)
-{
-	struct wusbhc *wusbhc = &whc->wusbhc;
-	long t;
-
-	mutex_lock(&wusbhc->mutex);
-	if (wusbhc->active) {
-		whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
-		t = wait_event_timeout(
-			whc->periodic_list_wq,
-			(le_readl(whc->base + WUSBCMD) & WUSBCMD_PERIODIC_UPDATED) == 0,
-			msecs_to_jiffies(1000));
-		if (t == 0)
-			whc_hw_error(whc, "PZL update timeout");
-	}
-	mutex_unlock(&wusbhc->mutex);
-}
-
-static void update_pzl_hw_view(struct whc *whc)
-{
-	struct whc_qset *qset, *t;
-	int period;
-	u64 tmp_qh = 0;
-
-	for (period = 0; period < 5; period++) {
-		list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
-			whc_qset_set_link_ptr(&qset->qh.link, tmp_qh);
-			tmp_qh = qset->qset_dma;
-			qset->in_hw_list = true;
-		}
-		update_pzl_pointers(whc, period, tmp_qh);
-	}
-}
-
-/**
- * scan_periodic_work - scan the PZL for qsets to process.
- *
- * Process each qset in the PZL in turn and then signal the WHC that
- * the PZL has been updated.
- *
- * Then start, stop or update the periodic schedule as required.
- */
-void scan_periodic_work(struct work_struct *work)
-{
-	struct whc *whc = container_of(work, struct whc, periodic_work);
-	struct whc_qset *qset, *t;
-	enum whc_update update = 0;
-	int period;
-
-	spin_lock_irq(&whc->lock);
-
-	for (period = 4; period >= 0; period--) {
-		list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
-			if (!qset->in_hw_list)
-				update |= WHC_UPDATE_ADDED;
-			update |= pzl_process_qset(whc, qset);
-		}
-	}
-
-	if (update & (WHC_UPDATE_ADDED | WHC_UPDATE_REMOVED))
-		update_pzl_hw_view(whc);
-
-	spin_unlock_irq(&whc->lock);
-
-	if (update) {
-		uint32_t wusbcmd = WUSBCMD_PERIODIC_UPDATED | WUSBCMD_PERIODIC_SYNCED_DB;
-		if (update & WHC_UPDATE_REMOVED)
-			wusbcmd |= WUSBCMD_PERIODIC_QSET_RM;
-		pzl_update(whc, wusbcmd);
-	}
-
-	/*
-	 * Now that the PZL is updated, complete the removal of any
-	 * removed qsets.
-	 *
-	 * If the qset was to be reset, do so and reinsert it into the
-	 * PZL if it has pending transfers.
-	 */
-	spin_lock_irq(&whc->lock);
-
-	list_for_each_entry_safe(qset, t, &whc->periodic_removed_list, list_node) {
-		qset_remove_complete(whc, qset);
-		if (qset->reset) {
-			qset_reset(whc, qset);
-			if (!list_empty(&qset->stds)) {
-				qset_insert_in_sw_list(whc, qset);
-				queue_work(whc->workqueue, &whc->periodic_work);
-			}
-		}
-	}
-
-	spin_unlock_irq(&whc->lock);
-}
-
-/**
- * pzl_urb_enqueue - queue an URB onto the periodic list (PZL)
- * @whc: the WHCI host controller
- * @urb: the URB to enqueue
- * @mem_flags: flags for any memory allocations
- *
- * The qset for the endpoint is obtained and the urb queued on to it.
- *
- * Work is scheduled to update the hardware's view of the PZL.
- */
-int pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
-{
-	struct whc_qset *qset;
-	int err;
-	unsigned long flags;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
-	if (err < 0) {
-		spin_unlock_irqrestore(&whc->lock, flags);
-		return err;
-	}
-
-	qset = get_qset(whc, urb, GFP_ATOMIC);
-	if (qset == NULL)
-		err = -ENOMEM;
-	else
-		err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
-	if (!err) {
-		if (!qset->in_sw_list && !qset->remove)
-			qset_insert_in_sw_list(whc, qset);
-	} else
-		usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb);
-
-	spin_unlock_irqrestore(&whc->lock, flags);
-
-	if (!err)
-		queue_work(whc->workqueue, &whc->periodic_work);
-
-	return err;
-}
-
-/**
- * pzl_urb_dequeue - remove an URB (qset) from the periodic list
- * @whc: the WHCI host controller
- * @urb: the URB to dequeue
- * @status: the current status of the URB
- *
- * URBs that do yet have qTDs can simply be removed from the software
- * queue, otherwise the qset must be removed so the qTDs can be safely
- * removed.
- */
-int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
-{
-	struct whc_urb *wurb = urb->hcpriv;
-	struct whc_qset *qset = wurb->qset;
-	struct whc_std *std, *t;
-	bool has_qtd = false;
-	int ret;
-	unsigned long flags;
-
-	spin_lock_irqsave(&whc->lock, flags);
-
-	ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
-	if (ret < 0)
-		goto out;
-
-	list_for_each_entry_safe(std, t, &qset->stds, list_node) {
-		if (std->urb == urb) {
-			if (std->qtd)
-				has_qtd = true;
-			qset_free_std(whc, std);
-		} else
-			std->qtd = NULL; /* so this std is re-added when the qset is */
-	}
-
-	if (has_qtd) {
-		pzl_qset_remove(whc, qset);
-		update_pzl_hw_view(whc);
-		wurb->status = status;
-		wurb->is_async = false;
-		queue_work(whc->workqueue, &wurb->dequeue_work);
-	} else
-		qset_remove_urb(whc, qset, urb, status);
-out:
-	spin_unlock_irqrestore(&whc->lock, flags);
-
-	return ret;
-}
-
-/**
- * pzl_qset_delete - delete a qset from the PZL
- */
-void pzl_qset_delete(struct whc *whc, struct whc_qset *qset)
-{
-	qset->remove = 1;
-	queue_work(whc->workqueue, &whc->periodic_work);
-	qset_delete(whc, qset);
-}
-
-/**
- * pzl_init - initialize the periodic zone list
- * @whc: the WHCI host controller
- */
-int pzl_init(struct whc *whc)
-{
-	int i;
-
-	whc->pz_list = dma_alloc_coherent(&whc->umc->dev, sizeof(u64) * 16,
-					  &whc->pz_list_dma, GFP_KERNEL);
-	if (whc->pz_list == NULL)
-		return -ENOMEM;
-
-	/* Set T bit on all elements in PZL. */
-	for (i = 0; i < 16; i++)
-		whc->pz_list[i] = cpu_to_le64(QH_LINK_NTDS(8) | QH_LINK_T);
-
-	le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
-
-	return 0;
-}
-
-/**
- * pzl_clean_up - free PZL resources
- * @whc: the WHCI host controller
- *
- * The PZL is stopped and empty.
- */
-void pzl_clean_up(struct whc *whc)
-{
-	if (whc->pz_list)
-		dma_free_coherent(&whc->umc->dev,  sizeof(u64) * 16, whc->pz_list,
-				  whc->pz_list_dma);
-}
diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
deleted file mode 100644
index 925166a207aa..000000000000
--- a/drivers/usb/host/whci/qset.c
+++ /dev/null
@@ -1,831 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) qset management.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/dma-mapping.h>
-#include <linux/slab.h>
-#include <linux/uwb/umc.h>
-#include <linux/usb.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags)
-{
-	struct whc_qset *qset;
-	dma_addr_t dma;
-
-	qset = dma_pool_zalloc(whc->qset_pool, mem_flags, &dma);
-	if (qset == NULL)
-		return NULL;
-
-	qset->qset_dma = dma;
-	qset->whc = whc;
-
-	INIT_LIST_HEAD(&qset->list_node);
-	INIT_LIST_HEAD(&qset->stds);
-
-	return qset;
-}
-
-/**
- * qset_fill_qh - fill the static endpoint state in a qset's QHead
- * @qset: the qset whose QH needs initializing with static endpoint
- *        state
- * @urb:  an urb for a transfer to this endpoint
- */
-static void qset_fill_qh(struct whc *whc, struct whc_qset *qset, struct urb *urb)
-{
-	struct usb_device *usb_dev = urb->dev;
-	struct wusb_dev *wusb_dev = usb_dev->wusb_dev;
-	struct usb_wireless_ep_comp_descriptor *epcd;
-	bool is_out;
-	uint8_t phy_rate;
-
-	is_out = usb_pipeout(urb->pipe);
-
-	qset->max_packet = le16_to_cpu(urb->ep->desc.wMaxPacketSize);
-
-	epcd = (struct usb_wireless_ep_comp_descriptor *)qset->ep->extra;
-	if (epcd) {
-		qset->max_seq = epcd->bMaxSequence;
-		qset->max_burst = epcd->bMaxBurst;
-	} else {
-		qset->max_seq = 2;
-		qset->max_burst = 1;
-	}
-
-	/*
-	 * Initial PHY rate is 53.3 Mbit/s for control endpoints or
-	 * the maximum supported by the device for other endpoints
-	 * (unless limited by the user).
-	 */
-	if (usb_pipecontrol(urb->pipe))
-		phy_rate = UWB_PHY_RATE_53;
-	else {
-		uint16_t phy_rates;
-
-		phy_rates = le16_to_cpu(wusb_dev->wusb_cap_descr->wPHYRates);
-		phy_rate = fls(phy_rates) - 1;
-		if (phy_rate > whc->wusbhc.phy_rate)
-			phy_rate = whc->wusbhc.phy_rate;
-	}
-
-	qset->qh.info1 = cpu_to_le32(
-		QH_INFO1_EP(usb_pipeendpoint(urb->pipe))
-		| (is_out ? QH_INFO1_DIR_OUT : QH_INFO1_DIR_IN)
-		| usb_pipe_to_qh_type(urb->pipe)
-		| QH_INFO1_DEV_INFO_IDX(wusb_port_no_to_idx(usb_dev->portnum))
-		| QH_INFO1_MAX_PKT_LEN(qset->max_packet)
-		);
-	qset->qh.info2 = cpu_to_le32(
-		QH_INFO2_BURST(qset->max_burst)
-		| QH_INFO2_DBP(0)
-		| QH_INFO2_MAX_COUNT(3)
-		| QH_INFO2_MAX_RETRY(3)
-		| QH_INFO2_MAX_SEQ(qset->max_seq - 1)
-		);
-	/* FIXME: where can we obtain these Tx parameters from?  Why
-	 * doesn't the chip know what Tx power to use? It knows the Rx
-	 * strength and can presumably guess the Tx power required
-	 * from that? */
-	qset->qh.info3 = cpu_to_le32(
-		QH_INFO3_TX_RATE(phy_rate)
-		| QH_INFO3_TX_PWR(0) /* 0 == max power */
-		);
-
-	qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1);
-}
-
-/**
- * qset_clear - clear fields in a qset so it may be reinserted into a
- * schedule.
- *
- * The sequence number and current window are not cleared (see
- * qset_reset()).
- */
-void qset_clear(struct whc *whc, struct whc_qset *qset)
-{
-	qset->td_start = qset->td_end = qset->ntds = 0;
-
-	qset->qh.link = cpu_to_le64(QH_LINK_NTDS(8) | QH_LINK_T);
-	qset->qh.status = qset->qh.status & QH_STATUS_SEQ_MASK;
-	qset->qh.err_count = 0;
-	qset->qh.scratch[0] = 0;
-	qset->qh.scratch[1] = 0;
-	qset->qh.scratch[2] = 0;
-
-	memset(&qset->qh.overlay, 0, sizeof(qset->qh.overlay));
-
-	init_completion(&qset->remove_complete);
-}
-
-/**
- * qset_reset - reset endpoint state in a qset.
- *
- * Clears the sequence number and current window.  This qset must not
- * be in the ASL or PZL.
- */
-void qset_reset(struct whc *whc, struct whc_qset *qset)
-{
-	qset->reset = 0;
-
-	qset->qh.status &= ~QH_STATUS_SEQ_MASK;
-	qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1);
-}
-
-/**
- * get_qset - get the qset for an async endpoint
- *
- * A new qset is created if one does not already exist.
- */
-struct whc_qset *get_qset(struct whc *whc, struct urb *urb,
-				 gfp_t mem_flags)
-{
-	struct whc_qset *qset;
-
-	qset = urb->ep->hcpriv;
-	if (qset == NULL) {
-		qset = qset_alloc(whc, mem_flags);
-		if (qset == NULL)
-			return NULL;
-
-		qset->ep = urb->ep;
-		urb->ep->hcpriv = qset;
-		qset_fill_qh(whc, qset, urb);
-	}
-	return qset;
-}
-
-void qset_remove_complete(struct whc *whc, struct whc_qset *qset)
-{
-	qset->remove = 0;
-	list_del_init(&qset->list_node);
-	complete(&qset->remove_complete);
-}
-
-/**
- * qset_add_qtds - add qTDs for an URB to a qset
- *
- * Returns true if the list (ASL/PZL) must be updated because (for a
- * WHCI 0.95 controller) an activated qTD was pointed to be iCur.
- */
-enum whc_update qset_add_qtds(struct whc *whc, struct whc_qset *qset)
-{
-	struct whc_std *std;
-	enum whc_update update = 0;
-
-	list_for_each_entry(std, &qset->stds, list_node) {
-		struct whc_qtd *qtd;
-		uint32_t status;
-
-		if (qset->ntds >= WHCI_QSET_TD_MAX
-		    || (qset->pause_after_urb && std->urb != qset->pause_after_urb))
-			break;
-
-		if (std->qtd)
-			continue; /* already has a qTD */
-
-		qtd = std->qtd = &qset->qtd[qset->td_end];
-
-		/* Fill in setup bytes for control transfers. */
-		if (usb_pipecontrol(std->urb->pipe))
-			memcpy(qtd->setup, std->urb->setup_packet, 8);
-
-		status = QTD_STS_ACTIVE | QTD_STS_LEN(std->len);
-
-		if (whc_std_last(std) && usb_pipeout(std->urb->pipe))
-			status |= QTD_STS_LAST_PKT;
-
-		/*
-		 * For an IN transfer the iAlt field should be set so
-		 * the h/w will automatically advance to the next
-		 * transfer. However, if there are 8 or more TDs
-		 * remaining in this transfer then iAlt cannot be set
-		 * as it could point to somewhere in this transfer.
-		 */
-		if (std->ntds_remaining < WHCI_QSET_TD_MAX) {
-			int ialt;
-			ialt = (qset->td_end + std->ntds_remaining) % WHCI_QSET_TD_MAX;
-			status |= QTD_STS_IALT(ialt);
-		} else if (usb_pipein(std->urb->pipe))
-			qset->pause_after_urb = std->urb;
-
-		if (std->num_pointers)
-			qtd->options = cpu_to_le32(QTD_OPT_IOC);
-		else
-			qtd->options = cpu_to_le32(QTD_OPT_IOC | QTD_OPT_SMALL);
-		qtd->page_list_ptr = cpu_to_le64(std->dma_addr);
-
-		qtd->status = cpu_to_le32(status);
-
-		if (QH_STATUS_TO_ICUR(qset->qh.status) == qset->td_end)
-			update = WHC_UPDATE_UPDATED;
-
-		if (++qset->td_end >= WHCI_QSET_TD_MAX)
-			qset->td_end = 0;
-		qset->ntds++;
-	}
-
-	return update;
-}
-
-/**
- * qset_remove_qtd - remove the first qTD from a qset.
- *
- * The qTD might be still active (if it's part of a IN URB that
- * resulted in a short read) so ensure it's deactivated.
- */
-static void qset_remove_qtd(struct whc *whc, struct whc_qset *qset)
-{
-	qset->qtd[qset->td_start].status = 0;
-
-	if (++qset->td_start >= WHCI_QSET_TD_MAX)
-		qset->td_start = 0;
-	qset->ntds--;
-}
-
-static void qset_copy_bounce_to_sg(struct whc *whc, struct whc_std *std)
-{
-	struct scatterlist *sg;
-	void *bounce;
-	size_t remaining, offset;
-
-	bounce = std->bounce_buf;
-	remaining = std->len;
-
-	sg = std->bounce_sg;
-	offset = std->bounce_offset;
-
-	while (remaining) {
-		size_t len;
-
-		len = min(sg->length - offset, remaining);
-		memcpy(sg_virt(sg) + offset, bounce, len);
-
-		bounce += len;
-		remaining -= len;
-
-		offset += len;
-		if (offset >= sg->length) {
-			sg = sg_next(sg);
-			offset = 0;
-		}
-	}
-
-}
-
-/**
- * qset_free_std - remove an sTD and free it.
- * @whc: the WHCI host controller
- * @std: the sTD to remove and free.
- */
-void qset_free_std(struct whc *whc, struct whc_std *std)
-{
-	list_del(&std->list_node);
-	if (std->bounce_buf) {
-		bool is_out = usb_pipeout(std->urb->pipe);
-		dma_addr_t dma_addr;
-
-		if (std->num_pointers)
-			dma_addr = le64_to_cpu(std->pl_virt[0].buf_ptr);
-		else
-			dma_addr = std->dma_addr;
-
-		dma_unmap_single(whc->wusbhc.dev, dma_addr,
-				 std->len, is_out ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		if (!is_out)
-			qset_copy_bounce_to_sg(whc, std);
-		kfree(std->bounce_buf);
-	}
-	if (std->pl_virt) {
-		if (!dma_mapping_error(whc->wusbhc.dev, std->dma_addr))
-			dma_unmap_single(whc->wusbhc.dev, std->dma_addr,
-					 std->num_pointers * sizeof(struct whc_page_list_entry),
-					 DMA_TO_DEVICE);
-		kfree(std->pl_virt);
-		std->pl_virt = NULL;
-	}
-	kfree(std);
-}
-
-/**
- * qset_remove_qtds - remove an URB's qTDs (and sTDs).
- */
-static void qset_remove_qtds(struct whc *whc, struct whc_qset *qset,
-			     struct urb *urb)
-{
-	struct whc_std *std, *t;
-
-	list_for_each_entry_safe(std, t, &qset->stds, list_node) {
-		if (std->urb != urb)
-			break;
-		if (std->qtd != NULL)
-			qset_remove_qtd(whc, qset);
-		qset_free_std(whc, std);
-	}
-}
-
-/**
- * qset_free_stds - free any remaining sTDs for an URB.
- */
-static void qset_free_stds(struct whc_qset *qset, struct urb *urb)
-{
-	struct whc_std *std, *t;
-
-	list_for_each_entry_safe(std, t, &qset->stds, list_node) {
-		if (std->urb == urb)
-			qset_free_std(qset->whc, std);
-	}
-}
-
-static int qset_fill_page_list(struct whc *whc, struct whc_std *std, gfp_t mem_flags)
-{
-	dma_addr_t dma_addr = std->dma_addr;
-	dma_addr_t sp, ep;
-	size_t pl_len;
-	int p;
-
-	/* Short buffers don't need a page list. */
-	if (std->len <= WHCI_PAGE_SIZE) {
-		std->num_pointers = 0;
-		return 0;
-	}
-
-	sp = dma_addr & ~(WHCI_PAGE_SIZE-1);
-	ep = dma_addr + std->len;
-	std->num_pointers = DIV_ROUND_UP(ep - sp, WHCI_PAGE_SIZE);
-
-	pl_len = std->num_pointers * sizeof(struct whc_page_list_entry);
-	std->pl_virt = kmalloc(pl_len, mem_flags);
-	if (std->pl_virt == NULL)
-		return -ENOMEM;
-	std->dma_addr = dma_map_single(whc->wusbhc.dev, std->pl_virt, pl_len, DMA_TO_DEVICE);
-	if (dma_mapping_error(whc->wusbhc.dev, std->dma_addr)) {
-		kfree(std->pl_virt);
-		return -EFAULT;
-	}
-
-	for (p = 0; p < std->num_pointers; p++) {
-		std->pl_virt[p].buf_ptr = cpu_to_le64(dma_addr);
-		dma_addr = (dma_addr + WHCI_PAGE_SIZE) & ~(WHCI_PAGE_SIZE-1);
-	}
-
-	return 0;
-}
-
-/**
- * urb_dequeue_work - executes asl/pzl update and gives back the urb to the system.
- */
-static void urb_dequeue_work(struct work_struct *work)
-{
-	struct whc_urb *wurb = container_of(work, struct whc_urb, dequeue_work);
-	struct whc_qset *qset = wurb->qset;
-	struct whc *whc = qset->whc;
-	unsigned long flags;
-
-	if (wurb->is_async)
-		asl_update(whc, WUSBCMD_ASYNC_UPDATED
-			   | WUSBCMD_ASYNC_SYNCED_DB
-			   | WUSBCMD_ASYNC_QSET_RM);
-	else
-		pzl_update(whc, WUSBCMD_PERIODIC_UPDATED
-			   | WUSBCMD_PERIODIC_SYNCED_DB
-			   | WUSBCMD_PERIODIC_QSET_RM);
-
-	spin_lock_irqsave(&whc->lock, flags);
-	qset_remove_urb(whc, qset, wurb->urb, wurb->status);
-	spin_unlock_irqrestore(&whc->lock, flags);
-}
-
-static struct whc_std *qset_new_std(struct whc *whc, struct whc_qset *qset,
-				    struct urb *urb, gfp_t mem_flags)
-{
-	struct whc_std *std;
-
-	std = kzalloc(sizeof(struct whc_std), mem_flags);
-	if (std == NULL)
-		return NULL;
-
-	std->urb = urb;
-	std->qtd = NULL;
-
-	INIT_LIST_HEAD(&std->list_node);
-	list_add_tail(&std->list_node, &qset->stds);
-
-	return std;
-}
-
-static int qset_add_urb_sg(struct whc *whc, struct whc_qset *qset, struct urb *urb,
-			   gfp_t mem_flags)
-{
-	size_t remaining;
-	struct scatterlist *sg;
-	int i;
-	int ntds = 0;
-	struct whc_std *std = NULL;
-	struct whc_page_list_entry *new_pl_virt;
-	dma_addr_t prev_end = 0;
-	size_t pl_len;
-	int p = 0;
-
-	remaining = urb->transfer_buffer_length;
-
-	for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
-		dma_addr_t dma_addr;
-		size_t dma_remaining;
-		dma_addr_t sp, ep;
-		int num_pointers;
-
-		if (remaining == 0) {
-			break;
-		}
-
-		dma_addr = sg_dma_address(sg);
-		dma_remaining = min_t(size_t, sg_dma_len(sg), remaining);
-
-		while (dma_remaining) {
-			size_t dma_len;
-
-			/*
-			 * We can use the previous std (if it exists) provided that:
-			 * - the previous one ended on a page boundary.
-			 * - the current one begins on a page boundary.
-			 * - the previous one isn't full.
-			 *
-			 * If a new std is needed but the previous one
-			 * was not a whole number of packets then this
-			 * sg list cannot be mapped onto multiple
-			 * qTDs.  Return an error and let the caller
-			 * sort it out.
-			 */
-			if (!std
-			    || (prev_end & (WHCI_PAGE_SIZE-1))
-			    || (dma_addr & (WHCI_PAGE_SIZE-1))
-			    || std->len + WHCI_PAGE_SIZE > QTD_MAX_XFER_SIZE) {
-				if (std && std->len % qset->max_packet != 0)
-					return -EINVAL;
-				std = qset_new_std(whc, qset, urb, mem_flags);
-				if (std == NULL) {
-					return -ENOMEM;
-				}
-				ntds++;
-				p = 0;
-			}
-
-			dma_len = dma_remaining;
-
-			/*
-			 * If the remainder of this element doesn't
-			 * fit in a single qTD, limit the qTD to a
-			 * whole number of packets.  This allows the
-			 * remainder to go into the next qTD.
-			 */
-			if (std->len + dma_len > QTD_MAX_XFER_SIZE) {
-				dma_len = (QTD_MAX_XFER_SIZE / qset->max_packet)
-					* qset->max_packet - std->len;
-			}
-
-			std->len += dma_len;
-			std->ntds_remaining = -1; /* filled in later */
-
-			sp = dma_addr & ~(WHCI_PAGE_SIZE-1);
-			ep = dma_addr + dma_len;
-			num_pointers = DIV_ROUND_UP(ep - sp, WHCI_PAGE_SIZE);
-			std->num_pointers += num_pointers;
-
-			pl_len = std->num_pointers * sizeof(struct whc_page_list_entry);
-
-			new_pl_virt = krealloc(std->pl_virt, pl_len, mem_flags);
-			if (new_pl_virt == NULL) {
-				kfree(std->pl_virt);
-				std->pl_virt = NULL;
-				return -ENOMEM;
-			}
-			std->pl_virt = new_pl_virt;
-
-			for (;p < std->num_pointers; p++) {
-				std->pl_virt[p].buf_ptr = cpu_to_le64(dma_addr);
-				dma_addr = (dma_addr + WHCI_PAGE_SIZE) & ~(WHCI_PAGE_SIZE-1);
-			}
-
-			prev_end = dma_addr = ep;
-			dma_remaining -= dma_len;
-			remaining -= dma_len;
-		}
-	}
-
-	/* Now the number of stds is know, go back and fill in
-	   std->ntds_remaining. */
-	list_for_each_entry(std, &qset->stds, list_node) {
-		if (std->ntds_remaining == -1) {
-			pl_len = std->num_pointers * sizeof(struct whc_page_list_entry);
-			std->dma_addr = dma_map_single(whc->wusbhc.dev, std->pl_virt,
-						       pl_len, DMA_TO_DEVICE);
-			if (dma_mapping_error(whc->wusbhc.dev, std->dma_addr))
-				return -EFAULT;
-			std->ntds_remaining = ntds--;
-		}
-	}
-	return 0;
-}
-
-/**
- * qset_add_urb_sg_linearize - add an urb with sg list, copying the data
- *
- * If the URB contains an sg list whose elements cannot be directly
- * mapped to qTDs then the data must be transferred via bounce
- * buffers.
- */
-static int qset_add_urb_sg_linearize(struct whc *whc, struct whc_qset *qset,
-				     struct urb *urb, gfp_t mem_flags)
-{
-	bool is_out = usb_pipeout(urb->pipe);
-	size_t max_std_len;
-	size_t remaining;
-	int ntds = 0;
-	struct whc_std *std = NULL;
-	void *bounce = NULL;
-	struct scatterlist *sg;
-	int i;
-
-	/* limit maximum bounce buffer to 16 * 3.5 KiB ~= 28 k */
-	max_std_len = qset->max_burst * qset->max_packet;
-
-	remaining = urb->transfer_buffer_length;
-
-	for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
-		size_t len;
-		size_t sg_remaining;
-		void *orig;
-
-		if (remaining == 0) {
-			break;
-		}
-
-		sg_remaining = min_t(size_t, remaining, sg->length);
-		orig = sg_virt(sg);
-
-		while (sg_remaining) {
-			if (!std || std->len == max_std_len) {
-				std = qset_new_std(whc, qset, urb, mem_flags);
-				if (std == NULL)
-					return -ENOMEM;
-				std->bounce_buf = kmalloc(max_std_len, mem_flags);
-				if (std->bounce_buf == NULL)
-					return -ENOMEM;
-				std->bounce_sg = sg;
-				std->bounce_offset = orig - sg_virt(sg);
-				bounce = std->bounce_buf;
-				ntds++;
-			}
-
-			len = min(sg_remaining, max_std_len - std->len);
-
-			if (is_out)
-				memcpy(bounce, orig, len);
-
-			std->len += len;
-			std->ntds_remaining = -1; /* filled in later */
-
-			bounce += len;
-			orig += len;
-			sg_remaining -= len;
-			remaining -= len;
-		}
-	}
-
-	/*
-	 * For each of the new sTDs, map the bounce buffers, create
-	 * page lists (if necessary), and fill in std->ntds_remaining.
-	 */
-	list_for_each_entry(std, &qset->stds, list_node) {
-		if (std->ntds_remaining != -1)
-			continue;
-
-		std->dma_addr = dma_map_single(&whc->umc->dev, std->bounce_buf, std->len,
-					       is_out ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		if (dma_mapping_error(&whc->umc->dev, std->dma_addr))
-			return -EFAULT;
-
-		if (qset_fill_page_list(whc, std, mem_flags) < 0)
-			return -ENOMEM;
-
-		std->ntds_remaining = ntds--;
-	}
-
-	return 0;
-}
-
-/**
- * qset_add_urb - add an urb to the qset's queue.
- *
- * The URB is chopped into sTDs, one for each qTD that will required.
- * At least one qTD (and sTD) is required even if the transfer has no
- * data (e.g., for some control transfers).
- */
-int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb,
-	gfp_t mem_flags)
-{
-	struct whc_urb *wurb;
-	int remaining = urb->transfer_buffer_length;
-	u64 transfer_dma = urb->transfer_dma;
-	int ntds_remaining;
-	int ret;
-
-	wurb = kzalloc(sizeof(struct whc_urb), mem_flags);
-	if (wurb == NULL)
-		goto err_no_mem;
-	urb->hcpriv = wurb;
-	wurb->qset = qset;
-	wurb->urb = urb;
-	INIT_WORK(&wurb->dequeue_work, urb_dequeue_work);
-
-	if (urb->num_sgs) {
-		ret = qset_add_urb_sg(whc, qset, urb, mem_flags);
-		if (ret == -EINVAL) {
-			qset_free_stds(qset, urb);
-			ret = qset_add_urb_sg_linearize(whc, qset, urb, mem_flags);
-		}
-		if (ret < 0)
-			goto err_no_mem;
-		return 0;
-	}
-
-	ntds_remaining = DIV_ROUND_UP(remaining, QTD_MAX_XFER_SIZE);
-	if (ntds_remaining == 0)
-		ntds_remaining = 1;
-
-	while (ntds_remaining) {
-		struct whc_std *std;
-		size_t std_len;
-
-		std_len = remaining;
-		if (std_len > QTD_MAX_XFER_SIZE)
-			std_len = QTD_MAX_XFER_SIZE;
-
-		std = qset_new_std(whc, qset, urb, mem_flags);
-		if (std == NULL)
-			goto err_no_mem;
-
-		std->dma_addr = transfer_dma;
-		std->len = std_len;
-		std->ntds_remaining = ntds_remaining;
-
-		if (qset_fill_page_list(whc, std, mem_flags) < 0)
-			goto err_no_mem;
-
-		ntds_remaining--;
-		remaining -= std_len;
-		transfer_dma += std_len;
-	}
-
-	return 0;
-
-err_no_mem:
-	qset_free_stds(qset, urb);
-	return -ENOMEM;
-}
-
-/**
- * qset_remove_urb - remove an URB from the urb queue.
- *
- * The URB is returned to the USB subsystem.
- */
-void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
-			    struct urb *urb, int status)
-{
-	struct wusbhc *wusbhc = &whc->wusbhc;
-	struct whc_urb *wurb = urb->hcpriv;
-
-	usb_hcd_unlink_urb_from_ep(&wusbhc->usb_hcd, urb);
-	/* Drop the lock as urb->complete() may enqueue another urb. */
-	spin_unlock(&whc->lock);
-	wusbhc_giveback_urb(wusbhc, urb, status);
-	spin_lock(&whc->lock);
-
-	kfree(wurb);
-}
-
-/**
- * get_urb_status_from_qtd - get the completed urb status from qTD status
- * @urb:    completed urb
- * @status: qTD status
- */
-static int get_urb_status_from_qtd(struct urb *urb, u32 status)
-{
-	if (status & QTD_STS_HALTED) {
-		if (status & QTD_STS_DBE)
-			return usb_pipein(urb->pipe) ? -ENOSR : -ECOMM;
-		else if (status & QTD_STS_BABBLE)
-			return -EOVERFLOW;
-		else if (status & QTD_STS_RCE)
-			return -ETIME;
-		return -EPIPE;
-	}
-	if (usb_pipein(urb->pipe)
-	    && (urb->transfer_flags & URB_SHORT_NOT_OK)
-	    && urb->actual_length < urb->transfer_buffer_length)
-		return -EREMOTEIO;
-	return 0;
-}
-
-/**
- * process_inactive_qtd - process an inactive (but not halted) qTD.
- *
- * Update the urb with the transfer bytes from the qTD, if the urb is
- * completely transferred or (in the case of an IN only) the LPF is
- * set, then the transfer is complete and the urb should be returned
- * to the system.
- */
-void process_inactive_qtd(struct whc *whc, struct whc_qset *qset,
-				 struct whc_qtd *qtd)
-{
-	struct whc_std *std = list_first_entry(&qset->stds, struct whc_std, list_node);
-	struct urb *urb = std->urb;
-	uint32_t status;
-	bool complete;
-
-	status = le32_to_cpu(qtd->status);
-
-	urb->actual_length += std->len - QTD_STS_TO_LEN(status);
-
-	if (usb_pipein(urb->pipe) && (status & QTD_STS_LAST_PKT))
-		complete = true;
-	else
-		complete = whc_std_last(std);
-
-	qset_remove_qtd(whc, qset);
-	qset_free_std(whc, std);
-
-	/*
-	 * Transfers for this URB are complete?  Then return it to the
-	 * USB subsystem.
-	 */
-	if (complete) {
-		qset_remove_qtds(whc, qset, urb);
-		qset_remove_urb(whc, qset, urb, get_urb_status_from_qtd(urb, status));
-
-		/*
-		 * If iAlt isn't valid then the hardware didn't
-		 * advance iCur. Adjust the start and end pointers to
-		 * match iCur.
-		 */
-		if (!(status & QTD_STS_IALT_VALID))
-			qset->td_start = qset->td_end
-				= QH_STATUS_TO_ICUR(le16_to_cpu(qset->qh.status));
-		qset->pause_after_urb = NULL;
-	}
-}
-
-/**
- * process_halted_qtd - process a qset with a halted qtd
- *
- * Remove all the qTDs for the failed URB and return the failed URB to
- * the USB subsystem.  Then remove all other qTDs so the qset can be
- * removed.
- *
- * FIXME: this is the point where rate adaptation can be done.  If a
- * transfer failed because it exceeded the maximum number of retries
- * then it could be reactivated with a slower rate without having to
- * remove the qset.
- */
-void process_halted_qtd(struct whc *whc, struct whc_qset *qset,
-			       struct whc_qtd *qtd)
-{
-	struct whc_std *std = list_first_entry(&qset->stds, struct whc_std, list_node);
-	struct urb *urb = std->urb;
-	int urb_status;
-
-	urb_status = get_urb_status_from_qtd(urb, le32_to_cpu(qtd->status));
-
-	qset_remove_qtds(whc, qset, urb);
-	qset_remove_urb(whc, qset, urb, urb_status);
-
-	list_for_each_entry(std, &qset->stds, list_node) {
-		if (qset->ntds == 0)
-			break;
-		qset_remove_qtd(whc, qset);
-		std->qtd = NULL;
-	}
-
-	qset->remove = 1;
-}
-
-void qset_free(struct whc *whc, struct whc_qset *qset)
-{
-	dma_pool_free(whc->qset_pool, qset, qset->qset_dma);
-}
-
-/**
- * qset_delete - wait for a qset to be unused, then free it.
- */
-void qset_delete(struct whc *whc, struct whc_qset *qset)
-{
-	wait_for_completion(&qset->remove_complete);
-	qset_free(whc, qset);
-}
diff --git a/drivers/usb/host/whci/whcd.h b/drivers/usb/host/whci/whcd.h
deleted file mode 100644
index 139476997e7c..000000000000
--- a/drivers/usb/host/whci/whcd.h
+++ /dev/null
@@ -1,202 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) private header.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#ifndef __WHCD_H
-#define __WHCD_H
-
-#include <linux/uwb/whci.h>
-#include <linux/uwb/umc.h>
-#include <linux/workqueue.h>
-
-#include "whci-hc.h"
-
-/* Generic command timeout. */
-#define WHC_GENCMD_TIMEOUT_MS 100
-
-struct whc_dbg;
-
-struct whc {
-	struct wusbhc wusbhc;
-	struct umc_dev *umc;
-
-	resource_size_t base_phys;
-	void __iomem *base;
-	int irq;
-
-	u8 n_devices;
-	u8 n_keys;
-	u8 n_mmc_ies;
-
-	u64 *pz_list;
-	struct dn_buf_entry *dn_buf;
-	struct di_buf_entry *di_buf;
-	dma_addr_t pz_list_dma;
-	dma_addr_t dn_buf_dma;
-	dma_addr_t di_buf_dma;
-
-	spinlock_t   lock;
-	struct mutex mutex;
-
-	void *            gen_cmd_buf;
-	dma_addr_t        gen_cmd_buf_dma;
-	wait_queue_head_t cmd_wq;
-
-	struct workqueue_struct *workqueue;
-	struct work_struct       dn_work;
-
-	struct dma_pool *qset_pool;
-
-	struct list_head async_list;
-	struct list_head async_removed_list;
-	wait_queue_head_t async_list_wq;
-	struct work_struct async_work;
-
-	struct list_head periodic_list[5];
-	struct list_head periodic_removed_list;
-	wait_queue_head_t periodic_list_wq;
-	struct work_struct periodic_work;
-
-	struct whc_dbg *dbg;
-};
-
-#define wusbhc_to_whc(w) (container_of((w), struct whc, wusbhc))
-
-/**
- * struct whc_std - a software TD.
- * @urb: the URB this sTD is for.
- * @offset: start of the URB's data for this TD.
- * @len: the length of data in the associated TD.
- * @ntds_remaining: number of TDs (starting from this one) in this transfer.
- *
- * @bounce_buf: a bounce buffer if the std was from an urb with a sg
- * list that could not be mapped to qTDs directly.
- * @bounce_sg: the first scatterlist element bounce_buf is for.
- * @bounce_offset: the offset into bounce_sg for the start of bounce_buf.
- *
- * Queued URBs may require more TDs than are available in a qset so we
- * use a list of these "software TDs" (sTDs) to hold per-TD data.
- */
-struct whc_std {
-	struct urb *urb;
-	size_t len;
-	int    ntds_remaining;
-	struct whc_qtd *qtd;
-
-	struct list_head list_node;
-	int num_pointers;
-	dma_addr_t dma_addr;
-	struct whc_page_list_entry *pl_virt;
-
-	void *bounce_buf;
-	struct scatterlist *bounce_sg;
-	unsigned bounce_offset;
-};
-
-/**
- * struct whc_urb - per URB host controller structure.
- * @urb: the URB this struct is for.
- * @qset: the qset associated to the URB.
- * @dequeue_work: the work to remove the URB when dequeued.
- * @is_async: the URB belongs to async sheduler or not.
- * @status: the status to be returned when calling wusbhc_giveback_urb.
- */
-struct whc_urb {
-	struct urb *urb;
-	struct whc_qset *qset;
-	struct work_struct dequeue_work;
-	bool is_async;
-	int status;
-};
-
-/**
- * whc_std_last - is this sTD the URB's last?
- * @std: the sTD to check.
- */
-static inline bool whc_std_last(struct whc_std *std)
-{
-	return std->ntds_remaining <= 1;
-}
-
-enum whc_update {
-	WHC_UPDATE_ADDED   = 0x01,
-	WHC_UPDATE_REMOVED = 0x02,
-	WHC_UPDATE_UPDATED = 0x04,
-};
-
-/* init.c */
-int whc_init(struct whc *whc);
-void whc_clean_up(struct whc *whc);
-
-/* hw.c */
-void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val);
-int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len);
-void whc_hw_error(struct whc *whc, const char *reason);
-
-/* wusb.c */
-int whc_wusbhc_start(struct wusbhc *wusbhc);
-void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay);
-int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
-		  u8 handle, struct wuie_hdr *wuie);
-int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle);
-int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm);
-int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev);
-int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots);
-int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
-		const void *ptk, size_t key_size);
-int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
-		const void *gtk, size_t key_size);
-int whc_set_cluster_id(struct whc *whc, u8 bcid);
-
-/* int.c */
-irqreturn_t whc_int_handler(struct usb_hcd *hcd);
-void whc_dn_work(struct work_struct *work);
-
-/* asl.c */
-void asl_start(struct whc *whc);
-void asl_stop(struct whc *whc);
-int  asl_init(struct whc *whc);
-void asl_clean_up(struct whc *whc);
-int  asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
-int  asl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
-void asl_qset_delete(struct whc *whc, struct whc_qset *qset);
-void scan_async_work(struct work_struct *work);
-
-/* pzl.c */
-int  pzl_init(struct whc *whc);
-void pzl_clean_up(struct whc *whc);
-void pzl_start(struct whc *whc);
-void pzl_stop(struct whc *whc);
-int  pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
-int  pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
-void pzl_qset_delete(struct whc *whc, struct whc_qset *qset);
-void scan_periodic_work(struct work_struct *work);
-
-/* qset.c */
-struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags);
-void qset_free(struct whc *whc, struct whc_qset *qset);
-struct whc_qset *get_qset(struct whc *whc, struct urb *urb, gfp_t mem_flags);
-void qset_delete(struct whc *whc, struct whc_qset *qset);
-void qset_clear(struct whc *whc, struct whc_qset *qset);
-void qset_reset(struct whc *whc, struct whc_qset *qset);
-int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb,
-		 gfp_t mem_flags);
-void qset_free_std(struct whc *whc, struct whc_std *std);
-void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
-			    struct urb *urb, int status);
-void process_halted_qtd(struct whc *whc, struct whc_qset *qset,
-			       struct whc_qtd *qtd);
-void process_inactive_qtd(struct whc *whc, struct whc_qset *qset,
-				 struct whc_qtd *qtd);
-enum whc_update qset_add_qtds(struct whc *whc, struct whc_qset *qset);
-void qset_remove_complete(struct whc *whc, struct whc_qset *qset);
-void pzl_update(struct whc *whc, uint32_t wusbcmd);
-void asl_update(struct whc *whc, uint32_t wusbcmd);
-
-/* debug.c */
-void whc_dbg_init(struct whc *whc);
-void whc_dbg_clean_up(struct whc *whc);
-
-#endif /* #ifndef __WHCD_H */
diff --git a/drivers/usb/host/whci/whci-hc.h b/drivers/usb/host/whci/whci-hc.h
deleted file mode 100644
index 5a86a57a80cc..000000000000
--- a/drivers/usb/host/whci/whci-hc.h
+++ /dev/null
@@ -1,401 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) data structures.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#ifndef _WHCI_WHCI_HC_H
-#define _WHCI_WHCI_HC_H
-
-#include <linux/list.h>
-
-/**
- * WHCI_PAGE_SIZE - page size use by WHCI
- *
- * WHCI assumes that host system uses pages of 4096 octets.
- */
-#define WHCI_PAGE_SIZE 4096
-
-
-/**
- * QTD_MAX_TXFER_SIZE - max number of bytes to transfer with a single
- * qtd.
- *
- * This is 2^20 - 1.
- */
-#define QTD_MAX_XFER_SIZE 1048575
-
-
-/**
- * struct whc_qtd - Queue Element Transfer Descriptors (qTD)
- *
- * This describes the data for a bulk, control or interrupt transfer.
- *
- * [WHCI] section 3.2.4
- */
-struct whc_qtd {
-	__le32 status; /*< remaining transfer len and transfer status */
-	__le32 options;
-	__le64 page_list_ptr; /*< physical pointer to data buffer page list*/
-	__u8   setup[8];      /*< setup data for control transfers */
-} __attribute__((packed));
-
-#define QTD_STS_ACTIVE     (1 << 31)  /* enable execution of transaction */
-#define QTD_STS_HALTED     (1 << 30)  /* transfer halted */
-#define QTD_STS_DBE        (1 << 29)  /* data buffer error */
-#define QTD_STS_BABBLE     (1 << 28)  /* babble detected */
-#define QTD_STS_RCE        (1 << 27)  /* retry count exceeded */
-#define QTD_STS_LAST_PKT   (1 << 26)  /* set Last Packet Flag in WUSB header */
-#define QTD_STS_INACTIVE   (1 << 25)  /* queue set is marked inactive */
-#define QTD_STS_IALT_VALID (1 << 23)                          /* iAlt field is valid */
-#define QTD_STS_IALT(i)    (QTD_STS_IALT_VALID | ((i) << 20)) /* iAlt field */
-#define QTD_STS_LEN(l)     ((l) << 0) /* transfer length */
-#define QTD_STS_TO_LEN(s)  ((s) & 0x000fffff)
-
-#define QTD_OPT_IOC      (1 << 1) /* page_list_ptr points to buffer directly */
-#define QTD_OPT_SMALL    (1 << 0) /* interrupt on complete */
-
-/**
- * struct whc_itd - Isochronous Queue Element Transfer Descriptors (iTD)
- *
- * This describes the data and other parameters for an isochronous
- * transfer.
- *
- * [WHCI] section 3.2.5
- */
-struct whc_itd {
-	__le16 presentation_time;    /*< presentation time for OUT transfers */
-	__u8   num_segments;         /*< number of data segments in segment list */
-	__u8   status;               /*< command execution status */
-	__le32 options;              /*< misc transfer options */
-	__le64 page_list_ptr;        /*< physical pointer to data buffer page list */
-	__le64 seg_list_ptr;         /*< physical pointer to segment list */
-} __attribute__((packed));
-
-#define ITD_STS_ACTIVE   (1 << 7) /* enable execution of transaction */
-#define ITD_STS_DBE      (1 << 5) /* data buffer error */
-#define ITD_STS_BABBLE   (1 << 4) /* babble detected */
-#define ITD_STS_INACTIVE (1 << 1) /* queue set is marked inactive */
-
-#define ITD_OPT_IOC      (1 << 1) /* interrupt on complete */
-#define ITD_OPT_SMALL    (1 << 0) /* page_list_ptr points to buffer directly */
-
-/**
- * Page list entry.
- *
- * A TD's page list must contain sufficient page list entries for the
- * total data length in the TD.
- *
- * [WHCI] section 3.2.4.3
- */
-struct whc_page_list_entry {
-	__le64 buf_ptr; /*< physical pointer to buffer */
-} __attribute__((packed));
-
-/**
- * struct whc_seg_list_entry - Segment list entry.
- *
- * Describes a portion of the data buffer described in the containing
- * qTD's page list.
- *
- * seg_ptr = qtd->page_list_ptr[qtd->seg_list_ptr[seg].idx].buf_ptr
- *           + qtd->seg_list_ptr[seg].offset;
- *
- * Segments can't cross page boundries.
- *
- * [WHCI] section 3.2.5.5
- */
-struct whc_seg_list_entry {
-	__le16 len;    /*< segment length */
-	__u8   idx;    /*< index into page list */
-	__u8   status; /*< segment status */
-	__le16 offset; /*< 12 bit offset into page */
-} __attribute__((packed));
-
-/**
- * struct whc_qhead - endpoint and status information for a qset.
- *
- * [WHCI] section 3.2.6
- */
-struct whc_qhead {
-	__le64 link; /*< next qset in list */
-	__le32 info1;
-	__le32 info2;
-	__le32 info3;
-	__le16 status;
-	__le16 err_count;  /*< transaction error count */
-	__le32 cur_window;
-	__le32 scratch[3]; /*< h/w scratch area */
-	union {
-		struct whc_qtd qtd;
-		struct whc_itd itd;
-	} overlay;
-} __attribute__((packed));
-
-#define QH_LINK_PTR_MASK (~0x03Full)
-#define QH_LINK_PTR(ptr) ((ptr) & QH_LINK_PTR_MASK)
-#define QH_LINK_IQS      (1 << 4) /* isochronous queue set */
-#define QH_LINK_NTDS(n)  (((n) - 1) << 1) /* number of TDs in queue set */
-#define QH_LINK_T        (1 << 0) /* last queue set in periodic schedule list */
-
-#define QH_INFO1_EP(e)           ((e) << 0)  /* endpoint number */
-#define QH_INFO1_DIR_IN          (1 << 4)    /* IN transfer */
-#define QH_INFO1_DIR_OUT         (0 << 4)    /* OUT transfer */
-#define QH_INFO1_TR_TYPE_CTRL    (0x0 << 5)  /* control transfer */
-#define QH_INFO1_TR_TYPE_ISOC    (0x1 << 5)  /* isochronous transfer */
-#define QH_INFO1_TR_TYPE_BULK    (0x2 << 5)  /* bulk transfer */
-#define QH_INFO1_TR_TYPE_INT     (0x3 << 5)  /* interrupt */
-#define QH_INFO1_TR_TYPE_LP_INT  (0x7 << 5)  /* low power interrupt */
-#define QH_INFO1_DEV_INFO_IDX(i) ((i) << 8)  /* index into device info buffer */
-#define QH_INFO1_SET_INACTIVE    (1 << 15)   /* set inactive after transfer */
-#define QH_INFO1_MAX_PKT_LEN(l)  ((l) << 16) /* maximum packet length */
-
-#define QH_INFO2_BURST(b)        ((b) << 0)  /* maximum burst length */
-#define QH_INFO2_DBP(p)          ((p) << 5)  /* data burst policy (see [WUSB] table 5-7) */
-#define QH_INFO2_MAX_COUNT(c)    ((c) << 8)  /* max isoc/int pkts per zone */
-#define QH_INFO2_RQS             (1 << 15)   /* reactivate queue set */
-#define QH_INFO2_MAX_RETRY(r)    ((r) << 16) /* maximum transaction retries */
-#define QH_INFO2_MAX_SEQ(s)      ((s) << 20) /* maximum sequence number */
-#define QH_INFO3_MAX_DELAY(d)    ((d) << 0)  /* maximum stream delay in 125 us units (isoc only) */
-#define QH_INFO3_INTERVAL(i)     ((i) << 16) /* segment interval in 125 us units (isoc only) */
-
-#define QH_INFO3_TX_RATE(r)      ((r) << 24) /* PHY rate (see [ECMA-368] section 10.3.1.1) */
-#define QH_INFO3_TX_PWR(p)       ((p) << 29) /* transmit power (see [WUSB] section 5.2.1.2) */
-
-#define QH_STATUS_FLOW_CTRL      (1 << 15)
-#define QH_STATUS_ICUR(i)        ((i) << 5)
-#define QH_STATUS_TO_ICUR(s)     (((s) >> 5) & 0x7)
-#define QH_STATUS_SEQ_MASK       0x1f
-
-/**
- * usb_pipe_to_qh_type - USB core pipe type to QH transfer type
- *
- * Returns the QH type field for a USB core pipe type.
- */
-static inline unsigned usb_pipe_to_qh_type(unsigned pipe)
-{
-	static const unsigned type[] = {
-		[PIPE_ISOCHRONOUS] = QH_INFO1_TR_TYPE_ISOC,
-		[PIPE_INTERRUPT]   = QH_INFO1_TR_TYPE_INT,
-		[PIPE_CONTROL]     = QH_INFO1_TR_TYPE_CTRL,
-		[PIPE_BULK]        = QH_INFO1_TR_TYPE_BULK,
-	};
-	return type[usb_pipetype(pipe)];
-}
-
-/**
- * Maxiumum number of TDs in a qset.
- */
-#define WHCI_QSET_TD_MAX 8
-
-/**
- * struct whc_qset - WUSB data transfers to a specific endpoint
- * @qh: the QHead of this qset
- * @qtd: up to 8 qTDs (for qsets for control, bulk and interrupt
- * transfers)
- * @itd: up to 8 iTDs (for qsets for isochronous transfers)
- * @qset_dma: DMA address for this qset
- * @whc: WHCI HC this qset is for
- * @ep: endpoint
- * @stds: list of sTDs queued to this qset
- * @ntds: number of qTDs queued (not necessarily the same as nTDs
- * field in the QH)
- * @td_start: index of the first qTD in the list
- * @td_end: index of next free qTD in the list (provided
- *          ntds < WHCI_QSET_TD_MAX)
- *
- * Queue Sets (qsets) are added to the asynchronous schedule list
- * (ASL) or the periodic zone list (PZL).
- *
- * qsets may contain up to 8 TDs (either qTDs or iTDs as appropriate).
- * Each TD may refer to at most 1 MiB of data. If a single transfer
- * has > 8MiB of data, TDs can be reused as they are completed since
- * the TD list is used as a circular buffer.  Similarly, several
- * (smaller) transfers may be queued in a qset.
- *
- * WHCI controllers may cache portions of the qsets in the ASL and
- * PZL, requiring the WHCD to inform the WHC that the lists have been
- * updated (fields changed or qsets inserted or removed).  For safe
- * insertion and removal of qsets from the lists the schedule must be
- * stopped to avoid races in updating the QH link pointers.
- *
- * Since the HC is free to execute qsets in any order, all transfers
- * to an endpoint should use the same qset to ensure transfers are
- * executed in the order they're submitted.
- *
- * [WHCI] section 3.2.3
- */
-struct whc_qset {
-	struct whc_qhead qh;
-	union {
-		struct whc_qtd qtd[WHCI_QSET_TD_MAX];
-		struct whc_itd itd[WHCI_QSET_TD_MAX];
-	};
-
-	/* private data for WHCD */
-	dma_addr_t qset_dma;
-	struct whc *whc;
-	struct usb_host_endpoint *ep;
-	struct list_head stds;
-	int ntds;
-	int td_start;
-	int td_end;
-	struct list_head list_node;
-	unsigned in_sw_list:1;
-	unsigned in_hw_list:1;
-	unsigned remove:1;
-	unsigned reset:1;
-	struct urb *pause_after_urb;
-	struct completion remove_complete;
-	uint16_t max_packet;
-	uint8_t max_burst;
-	uint8_t max_seq;
-};
-
-static inline void whc_qset_set_link_ptr(u64 *ptr, u64 target)
-{
-	if (target)
-		*ptr = (*ptr & ~(QH_LINK_PTR_MASK | QH_LINK_T)) | QH_LINK_PTR(target);
-	else
-		*ptr = QH_LINK_T;
-}
-
-/**
- * struct di_buf_entry - Device Information (DI) buffer entry.
- *
- * There's one of these per connected device.
- */
-struct di_buf_entry {
-	__le32 availability_info[8]; /*< MAS availability information, one MAS per bit */
-	__le32 addr_sec_info;        /*< addressing and security info */
-	__le32 reserved[7];
-} __attribute__((packed));
-
-#define WHC_DI_SECURE           (1 << 31)
-#define WHC_DI_DISABLE          (1 << 30)
-#define WHC_DI_KEY_IDX(k)       ((k) << 8)
-#define WHC_DI_KEY_IDX_MASK     0x0000ff00
-#define WHC_DI_DEV_ADDR(a)      ((a) << 0)
-#define WHC_DI_DEV_ADDR_MASK    0x000000ff
-
-/**
- * struct dn_buf_entry - Device Notification (DN) buffer entry.
- *
- * [WHCI] section 3.2.8
- */
-struct dn_buf_entry {
-	__u8   msg_size;    /*< number of octets of valid DN data */
-	__u8   reserved1;
-	__u8   src_addr;    /*< source address */
-	__u8   status;      /*< buffer entry status */
-	__le32 tkid;        /*< TKID for source device, valid if secure bit is set */
-	__u8   dn_data[56]; /*< up to 56 octets of DN data */
-} __attribute__((packed));
-
-#define WHC_DN_STATUS_VALID  (1 << 7) /* buffer entry is valid */
-#define WHC_DN_STATUS_SECURE (1 << 6) /* notification received using secure frame */
-
-#define WHC_N_DN_ENTRIES (4096 / sizeof(struct dn_buf_entry))
-
-/* The Add MMC IE WUSB Generic Command may take up to 256 bytes of
-   data. [WHCI] section 2.4.7. */
-#define WHC_GEN_CMD_DATA_LEN 256
-
-/*
- * HC registers.
- *
- * [WHCI] section 2.4
- */
-
-#define WHCIVERSION          0x00
-
-#define WHCSPARAMS           0x04
-#  define WHCSPARAMS_TO_N_MMC_IES(p) (((p) >> 16) & 0xff)
-#  define WHCSPARAMS_TO_N_KEYS(p)    (((p) >> 8) & 0xff)
-#  define WHCSPARAMS_TO_N_DEVICES(p) (((p) >> 0) & 0x7f)
-
-#define WUSBCMD              0x08
-#  define WUSBCMD_BCID(b)            ((b) << 16)
-#  define WUSBCMD_BCID_MASK          (0xff << 16)
-#  define WUSBCMD_ASYNC_QSET_RM      (1 << 12)
-#  define WUSBCMD_PERIODIC_QSET_RM   (1 << 11)
-#  define WUSBCMD_WUSBSI(s)          ((s) << 8)
-#  define WUSBCMD_WUSBSI_MASK        (0x7 << 8)
-#  define WUSBCMD_ASYNC_SYNCED_DB    (1 << 7)
-#  define WUSBCMD_PERIODIC_SYNCED_DB (1 << 6)
-#  define WUSBCMD_ASYNC_UPDATED      (1 << 5)
-#  define WUSBCMD_PERIODIC_UPDATED   (1 << 4)
-#  define WUSBCMD_ASYNC_EN           (1 << 3)
-#  define WUSBCMD_PERIODIC_EN        (1 << 2)
-#  define WUSBCMD_WHCRESET           (1 << 1)
-#  define WUSBCMD_RUN                (1 << 0)
-
-#define WUSBSTS              0x0c
-#  define WUSBSTS_ASYNC_SCHED             (1 << 15)
-#  define WUSBSTS_PERIODIC_SCHED          (1 << 14)
-#  define WUSBSTS_DNTS_SCHED              (1 << 13)
-#  define WUSBSTS_HCHALTED                (1 << 12)
-#  define WUSBSTS_GEN_CMD_DONE            (1 << 9)
-#  define WUSBSTS_CHAN_TIME_ROLLOVER      (1 << 8)
-#  define WUSBSTS_DNTS_OVERFLOW           (1 << 7)
-#  define WUSBSTS_BPST_ADJUSTMENT_CHANGED (1 << 6)
-#  define WUSBSTS_HOST_ERR                (1 << 5)
-#  define WUSBSTS_ASYNC_SCHED_SYNCED      (1 << 4)
-#  define WUSBSTS_PERIODIC_SCHED_SYNCED   (1 << 3)
-#  define WUSBSTS_DNTS_INT                (1 << 2)
-#  define WUSBSTS_ERR_INT                 (1 << 1)
-#  define WUSBSTS_INT                     (1 << 0)
-#  define WUSBSTS_INT_MASK                0x3ff
-
-#define WUSBINTR             0x10
-#  define WUSBINTR_GEN_CMD_DONE             (1 << 9)
-#  define WUSBINTR_CHAN_TIME_ROLLOVER       (1 << 8)
-#  define WUSBINTR_DNTS_OVERFLOW            (1 << 7)
-#  define WUSBINTR_BPST_ADJUSTMENT_CHANGED  (1 << 6)
-#  define WUSBINTR_HOST_ERR                 (1 << 5)
-#  define WUSBINTR_ASYNC_SCHED_SYNCED       (1 << 4)
-#  define WUSBINTR_PERIODIC_SCHED_SYNCED    (1 << 3)
-#  define WUSBINTR_DNTS_INT                 (1 << 2)
-#  define WUSBINTR_ERR_INT                  (1 << 1)
-#  define WUSBINTR_INT                      (1 << 0)
-#  define WUSBINTR_ALL 0x3ff
-
-#define WUSBGENCMDSTS        0x14
-#  define WUSBGENCMDSTS_ACTIVE (1 << 31)
-#  define WUSBGENCMDSTS_ERROR  (1 << 24)
-#  define WUSBGENCMDSTS_IOC    (1 << 23)
-#  define WUSBGENCMDSTS_MMCIE_ADD 0x01
-#  define WUSBGENCMDSTS_MMCIE_RM  0x02
-#  define WUSBGENCMDSTS_SET_MAS   0x03
-#  define WUSBGENCMDSTS_CHAN_STOP 0x04
-#  define WUSBGENCMDSTS_RWP_EN    0x05
-
-#define WUSBGENCMDPARAMS     0x18
-#define WUSBGENADDR          0x20
-#define WUSBASYNCLISTADDR    0x28
-#define WUSBDNTSBUFADDR      0x30
-#define WUSBDEVICEINFOADDR   0x38
-
-#define WUSBSETSECKEYCMD     0x40
-#  define WUSBSETSECKEYCMD_SET    (1 << 31)
-#  define WUSBSETSECKEYCMD_ERASE  (1 << 30)
-#  define WUSBSETSECKEYCMD_GTK    (1 << 8)
-#  define WUSBSETSECKEYCMD_IDX(i) ((i) << 0)
-
-#define WUSBTKID             0x44
-#define WUSBSECKEY           0x48
-#define WUSBPERIODICLISTBASE 0x58
-#define WUSBMASINDEX         0x60
-
-#define WUSBDNTSCTRL         0x64
-#  define WUSBDNTSCTRL_ACTIVE      (1 << 31)
-#  define WUSBDNTSCTRL_INTERVAL(i) ((i) << 8)
-#  define WUSBDNTSCTRL_SLOTS(s)    ((s) << 0)
-
-#define WUSBTIME             0x68
-#  define WUSBTIME_CHANNEL_TIME_MASK 0x00ffffff
-
-#define WUSBBPST             0x6c
-#define WUSBDIBUPDATED       0x70
-
-#endif /* #ifndef _WHCI_WHCI_HC_H */
diff --git a/drivers/usb/host/whci/wusb.c b/drivers/usb/host/whci/wusb.c
deleted file mode 100644
index 8a4d805ff63a..000000000000
--- a/drivers/usb/host/whci/wusb.c
+++ /dev/null
@@ -1,210 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless Host Controller (WHC) WUSB operations.
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/uwb/umc.h>
-
-#include "../../wusbcore/wusbhc.h"
-
-#include "whcd.h"
-
-static int whc_update_di(struct whc *whc, int idx)
-{
-	int offset = idx / 32;
-	u32 bit = 1 << (idx % 32);
-
-	le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
-
-	return whci_wait_for(&whc->umc->dev,
-			     whc->base + WUSBDIBUPDATED + offset, bit, 0,
-			     100, "DI update");
-}
-
-/*
- * WHCI starts MMCs based on there being a valid GTK so these need
- * only start/stop the asynchronous and periodic schedules and send a
- * channel stop command.
- */
-
-int whc_wusbhc_start(struct wusbhc *wusbhc)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-
-	asl_start(whc);
-	pzl_start(whc);
-
-	return 0;
-}
-
-void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u32 stop_time, now_time;
-	int ret;
-
-	pzl_stop(whc);
-	asl_stop(whc);
-
-	now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
-	stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
-	ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
-	if (ret == 0)
-		msleep(delay);
-}
-
-int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
-		  u8 handle, struct wuie_hdr *wuie)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u32 params;
-
-	params = (interval << 24)
-		| (repeat_cnt << 16)
-		| (wuie->bLength << 8)
-		| handle;
-
-	return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
-}
-
-int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u32 params;
-
-	params = handle;
-
-	return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
-}
-
-int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-
-	if (stream_index >= 0)
-		whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
-
-	return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
-}
-
-int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	int idx = wusb_dev->port_idx;
-	struct di_buf_entry *di = &whc->di_buf[idx];
-	int ret;
-
-	mutex_lock(&whc->mutex);
-
-	uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
-	di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
-	di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
-
-	ret = whc_update_di(whc, idx);
-
-	mutex_unlock(&whc->mutex);
-
-	return ret;
-}
-
-/*
- * Set the number of Device Notification Time Slots (DNTS) and enable
- * device notifications.
- */
-int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	u32 dntsctrl;
-
-	dntsctrl = WUSBDNTSCTRL_ACTIVE
-		| WUSBDNTSCTRL_INTERVAL(interval)
-		| WUSBDNTSCTRL_SLOTS(slots);
-
-	le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
-
-	return 0;
-}
-
-static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
-		       const void *key, size_t key_size, bool is_gtk)
-{
-	uint32_t setkeycmd;
-	uint32_t seckey[4];
-	int i;
-	int ret;
-
-	memcpy(seckey, key, key_size);
-	setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
-	if (is_gtk)
-		setkeycmd |= WUSBSETSECKEYCMD_GTK;
-
-	le_writel(tkid, whc->base + WUSBTKID);
-	for (i = 0; i < 4; i++)
-		le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
-	le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
-
-	ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
-			    WUSBSETSECKEYCMD_SET, 0, 100, "set key");
-
-	return ret;
-}
-
-/**
- * whc_set_ptk - set the PTK to use for a device.
- *
- * The index into the key table for this PTK is the same as the
- * device's port index.
- */
-int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
-		const void *ptk, size_t key_size)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	struct di_buf_entry *di = &whc->di_buf[port_idx];
-	int ret;
-
-	mutex_lock(&whc->mutex);
-
-	if (ptk) {
-		ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
-		if (ret)
-			goto out;
-
-		di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
-		di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
-	} else
-		di->addr_sec_info &= ~WHC_DI_SECURE;
-
-	ret = whc_update_di(whc, port_idx);
-out:
-	mutex_unlock(&whc->mutex);
-	return ret;
-}
-
-/**
- * whc_set_gtk - set the GTK for subsequent broadcast packets
- *
- * The GTK is stored in the last entry in the key table (the previous
- * N_DEVICES entries are for the per-device PTKs).
- */
-int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
-		const void *gtk, size_t key_size)
-{
-	struct whc *whc = wusbhc_to_whc(wusbhc);
-	int ret;
-
-	mutex_lock(&whc->mutex);
-
-	ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
-
-	mutex_unlock(&whc->mutex);
-
-	return ret;
-}
-
-int whc_set_cluster_id(struct whc *whc, u8 bcid)
-{
-	whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
-	return 0;
-}
diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c
index 52e32644a4b2..93e2cca5262d 100644
--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -22,7 +22,6 @@ dbc_dma_alloc_coherent(struct xhci_hcd *xhci, size_t size,
 
 	vaddr = dma_alloc_coherent(xhci_to_hcd(xhci)->self.sysdev,
 				   size, dma_handle, flags);
-	memset(vaddr, 0, size);
 	return vaddr;
 }
 
diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index aff79ff5aba4..be726c791323 100644
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -139,14 +139,14 @@ xhci_dbc_alloc_requests(struct dbc_ep *dep, struct list_head *head,
 	struct dbc_request	*req;
 
 	for (i = 0; i < DBC_QUEUE_SIZE; i++) {
-		req = dbc_alloc_request(dep, GFP_ATOMIC);
+		req = dbc_alloc_request(dep, GFP_KERNEL);
 		if (!req)
 			break;
 
 		req->length = DBC_MAX_PACKET;
 		req->buf = kmalloc(req->length, GFP_KERNEL);
 		if (!req->buf) {
-			xhci_dbc_free_req(dep, req);
+			dbc_free_request(dep, req);
 			break;
 		}
 
diff --git a/drivers/usb/host/xhci-ext-caps.c b/drivers/usb/host/xhci-ext-caps.c
index 399113f9fc5c..f498160df969 100644
--- a/drivers/usb/host/xhci-ext-caps.c
+++ b/drivers/usb/host/xhci-ext-caps.c
@@ -6,11 +6,20 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/pci.h>
 #include "xhci.h"
 
 #define USB_SW_DRV_NAME		"intel_xhci_usb_sw"
 #define USB_SW_RESOURCE_SIZE	0x400
 
+#define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI	0x22b5
+
+static const struct property_entry role_switch_props[] = {
+	PROPERTY_ENTRY_BOOL("sw_switch_disable"),
+	{},
+};
+
 static void xhci_intel_unregister_pdev(void *arg)
 {
 	platform_device_unregister(arg);
@@ -21,6 +30,7 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset)
 	struct usb_hcd *hcd = xhci_to_hcd(xhci);
 	struct device *dev = hcd->self.controller;
 	struct platform_device *pdev;
+	struct pci_dev *pci = to_pci_dev(dev);
 	struct resource	res = { 0, };
 	int ret;
 
@@ -43,6 +53,14 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset)
 		return ret;
 	}
 
+	if (pci->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) {
+		ret = platform_device_add_properties(pdev, role_switch_props);
+		if (ret) {
+			dev_err(dev, "failed to register device properties\n");
+			return ret;
+		}
+	}
+
 	pdev->dev.parent = dev;
 
 	ret = platform_device_add(pdev);
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 3abe70ff1b1e..b7d23c438756 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1149,7 +1149,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			}
 			port_li = readl(ports[wIndex]->addr + PORTLI);
 			status = xhci_get_ext_port_status(temp, port_li);
-			put_unaligned_le32(cpu_to_le32(status), &buf[4]);
+			put_unaligned_le32(status, &buf[4]);
 		}
 		break;
 	case SetPortFeature:
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index cf5e17962179..e16eda6e2b8b 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2399,7 +2399,6 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 			flags);
 	if (!xhci->dcbaa)
 		goto fail;
-	memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa));
 	xhci->dcbaa->dma = dma;
 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 			"// Device context base array address = 0x%llx (DMA), %p (virt)",
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 026fe18972d3..b18a6baef204 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -216,6 +216,10 @@ static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
 		return PTR_ERR(mtk->sys_clk);
 	}
 
+	mtk->xhci_clk = devm_clk_get_optional(dev, "xhci_ck");
+	if (IS_ERR(mtk->xhci_clk))
+		return PTR_ERR(mtk->xhci_clk);
+
 	mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck");
 	if (IS_ERR(mtk->ref_clk))
 		return PTR_ERR(mtk->ref_clk);
@@ -244,6 +248,12 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 		goto sys_clk_err;
 	}
 
+	ret = clk_prepare_enable(mtk->xhci_clk);
+	if (ret) {
+		dev_err(mtk->dev, "failed to enable xhci_clk\n");
+		goto xhci_clk_err;
+	}
+
 	ret = clk_prepare_enable(mtk->mcu_clk);
 	if (ret) {
 		dev_err(mtk->dev, "failed to enable mcu_clk\n");
@@ -261,6 +271,8 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 dma_clk_err:
 	clk_disable_unprepare(mtk->mcu_clk);
 mcu_clk_err:
+	clk_disable_unprepare(mtk->xhci_clk);
+xhci_clk_err:
 	clk_disable_unprepare(mtk->sys_clk);
 sys_clk_err:
 	clk_disable_unprepare(mtk->ref_clk);
@@ -272,6 +284,7 @@ static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
 {
 	clk_disable_unprepare(mtk->dma_clk);
 	clk_disable_unprepare(mtk->mcu_clk);
+	clk_disable_unprepare(mtk->xhci_clk);
 	clk_disable_unprepare(mtk->sys_clk);
 	clk_disable_unprepare(mtk->ref_clk);
 }
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index 8be8c5f7ff62..5ac458b7d2e0 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -139,6 +139,7 @@ struct xhci_hcd_mtk {
 	struct regulator *vusb33;
 	struct regulator *vbus;
 	struct clk *sys_clk;	/* sys and mac clock */
+	struct clk *xhci_clk;
 	struct clk *ref_clk;
 	struct clk *mcu_clk;
 	struct clk *dma_clk;
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 998241f5fce3..d90cd5ec09cf 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -66,12 +66,14 @@ static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
 
 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
+	struct xhci_plat_priv *priv = xhci_to_priv(xhci);
+
 	/*
 	 * As of now platform drivers don't provide MSI support so we ensure
 	 * here that the generic code does not try to make a pci_dev from our
 	 * dev struct in order to setup MSI
 	 */
-	xhci->quirks |= XHCI_PLAT;
+	xhci->quirks |= XHCI_PLAT | priv->quirks;
 }
 
 /* called during probe() after chip reset completes */
@@ -103,17 +105,11 @@ static const struct xhci_plat_priv xhci_plat_marvell_armada3700 = {
 };
 
 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
-	.init_quirk = xhci_rcar_init_quirk,
-	.plat_start = xhci_rcar_start,
-	.resume_quirk = xhci_rcar_resume_quirk,
+	SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V1)
 };
 
 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3,
-	.init_quirk = xhci_rcar_init_quirk,
-	.plat_start = xhci_rcar_start,
-	.resume_quirk = xhci_rcar_resume_quirk,
+	SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3)
 };
 
 static const struct of_device_id usb_xhci_of_match[] = {
@@ -307,7 +303,6 @@ static int xhci_plat_probe(struct platform_device *pdev)
 		ret = usb_phy_init(hcd->usb_phy);
 		if (ret)
 			goto put_usb3_hcd;
-		hcd->skip_phy_initialization = 1;
 	}
 
 	hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index ae29f22ff5bd..5681723fc9cd 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -12,10 +12,12 @@
 
 struct xhci_plat_priv {
 	const char *firmware_name;
+	unsigned long long quirks;
 	void (*plat_start)(struct usb_hcd *);
 	int (*init_quirk)(struct usb_hcd *);
 	int (*resume_quirk)(struct usb_hcd *);
 };
 
 #define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
+#define xhci_to_priv(x) ((struct xhci_plat_priv *)(x)->priv)
 #endif	/* _XHCI_PLAT_H */
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 2b0ccd150209..c1025d321a41 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -107,15 +107,6 @@ static int xhci_rcar_is_gen2(struct device *dev)
 		of_device_is_compatible(node, "renesas,rcar-gen2-xhci");
 }
 
-static int xhci_rcar_is_gen3(struct device *dev)
-{
-	struct device_node *node = dev->of_node;
-
-	return of_device_is_compatible(node, "renesas,xhci-r8a7795") ||
-		of_device_is_compatible(node, "renesas,xhci-r8a7796") ||
-		of_device_is_compatible(node, "renesas,rcar-gen3-xhci");
-}
-
 void xhci_rcar_start(struct usb_hcd *hcd)
 {
 	u32 temp;
@@ -226,32 +217,13 @@ static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd)
 /* This function needs to initialize a "phy" of usb before */
 int xhci_rcar_init_quirk(struct usb_hcd *hcd)
 {
-	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-
 	/* If hcd->regs is NULL, we don't just call the following function */
 	if (!hcd->regs)
 		return 0;
 
-	/*
-	 * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
-	 * to 1. However, these SoCs don't support 64-bit address memory
-	 * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
-	 * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
-	 * xhci_gen_setup().
-	 *
-	 * And, since the firmware/internal CPU control the USBSTS.STS_HALT
-	 * and the process speed is down when the roothub port enters U3,
-	 * long delay for the handshake of STS_HALT is neeed in xhci_suspend().
-	 */
-	if (xhci_rcar_is_gen2(hcd->self.controller) ||
-			xhci_rcar_is_gen3(hcd->self.controller)) {
-		xhci->quirks |= XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND;
-	}
-
 	if (!xhci_rcar_wait_for_pll_active(hcd))
 		return -ETIMEDOUT;
 
-	xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 	return xhci_rcar_download_firmware(hcd);
 }
 
diff --git a/drivers/usb/host/xhci-rcar.h b/drivers/usb/host/xhci-rcar.h
index 804b6ab4246f..012744a63a49 100644
--- a/drivers/usb/host/xhci-rcar.h
+++ b/drivers/usb/host/xhci-rcar.h
@@ -31,4 +31,25 @@ static inline int xhci_rcar_resume_quirk(struct usb_hcd *hcd)
 	return 0;
 }
 #endif
+
+/*
+ * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
+ * to 1. However, these SoCs don't support 64-bit address memory
+ * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
+ * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
+ * xhci_gen_setup() by using the XHCI_NO_64BIT_SUPPORT quirk.
+ *
+ * And, since the firmware/internal CPU control the USBSTS.STS_HALT
+ * and the process speed is down when the roothub port enters U3,
+ * long delay for the handshake of STS_HALT is neeed in xhci_suspend()
+ * by using the XHCI_SLOW_SUSPEND quirk.
+ */
+#define SET_XHCI_PLAT_PRIV_FOR_RCAR(firmware)				\
+	.firmware_name = firmware,					\
+	.quirks = XHCI_NO_64BIT_SUPPORT | XHCI_TRUST_TX_LENGTH |	\
+		  XHCI_SLOW_SUSPEND,					\
+	.init_quirk = xhci_rcar_init_quirk,				\
+	.plat_start = xhci_rcar_start,					\
+	.resume_quirk = xhci_rcar_resume_quirk,
+
 #endif /* _XHCI_RCAR_H */
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 03d1e552769b..500865975687 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3814,7 +3814,6 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
 		virt_dev->eps[i].ep_state &= ~EP_STOP_CMD_PENDING;
 		del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
 	}
-	xhci_debugfs_remove_slot(xhci, udev->slot_id);
 	virt_dev->udev = NULL;
 	ret = xhci_disable_slot(xhci, udev->slot_id);
 	if (ret)
@@ -3832,6 +3831,8 @@ int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id)
 	if (!command)
 		return -ENOMEM;
 
+	xhci_debugfs_remove_slot(xhci, slot_id);
+
 	spin_lock_irqsave(&xhci->lock, flags);
 	/* Don't disable the slot if the host controller is dead. */
 	state = readl(&xhci->op_regs->status);
@@ -5217,7 +5218,7 @@ static const struct hc_driver xhci_hc_driver = {
 	 * generic hardware linkage
 	 */
 	.irq =			xhci_irq,
-	.flags =		HCD_MEMORY | HCD_USB3 | HCD_SHARED,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB3 | HCD_SHARED,
 
 	/*
 	 * basic lifecycle operations
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index f5c41448d067..f9f88626a57a 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -2337,12 +2337,13 @@ static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
 		break;
 	case TRB_RESET_EP:
 		sprintf(str,
-			"%s: ctx %08x%08x slot %d ep %d flags %c",
+			"%s: ctx %08x%08x slot %d ep %d flags %c:%c",
 			xhci_trb_type_string(type),
 			field1, field0,
 			TRB_TO_SLOT_ID(field3),
 			/* Macro decrements 1, maybe it shouldn't?!? */
 			TRB_TO_EP_INDEX(field3) + 1,
+			field3 & TRB_TSP ? 'T' : 't',
 			field3 & TRB_CYCLE ? 'C' : 'c');
 		break;
 	case TRB_STOP_RING:
diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c
index 55b94fd10331..fdeb4cf97cc5 100644
--- a/drivers/usb/isp1760/isp1760-core.c
+++ b/drivers/usb/isp1760/isp1760-core.c
@@ -120,9 +120,6 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
 	    (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || udc_disabled))
 		return -ENODEV;
 
-	/* prevent usb-core allocating DMA pages */
-	dev->dma_mask = NULL;
-
 	isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
 	if (!isp)
 		return -ENOMEM;
diff --git a/drivers/usb/isp1760/isp1760-if.c b/drivers/usb/isp1760/isp1760-if.c
index 241a00d75027..07cc82ff327c 100644
--- a/drivers/usb/isp1760/isp1760-if.c
+++ b/drivers/usb/isp1760/isp1760-if.c
@@ -139,7 +139,6 @@ static int isp1761_pci_probe(struct pci_dev *dev,
 
 	pci_set_master(dev);
 
-	dev->dev.dma_mask = NULL;
 	ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev,
 			       devflags);
 	if (ret < 0)
diff --git a/drivers/usb/misc/cypress_cy7c63.c b/drivers/usb/misc/cypress_cy7c63.c
index 9d780b77314b..14faec51d7a5 100644
--- a/drivers/usb/misc/cypress_cy7c63.c
+++ b/drivers/usb/misc/cypress_cy7c63.c
@@ -183,6 +183,7 @@ static ssize_t port0_show(struct device *dev,
 {
 	return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
 }
+static DEVICE_ATTR_RW(port0);
 
 /* attribute callback handler (read) */
 static ssize_t port1_show(struct device *dev,
@@ -190,11 +191,14 @@ static ssize_t port1_show(struct device *dev,
 {
 	return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
 }
-
-static DEVICE_ATTR_RW(port0);
-
 static DEVICE_ATTR_RW(port1);
 
+static struct attribute *cypress_attrs[] = {
+	&dev_attr_port0.attr,
+	&dev_attr_port1.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(cypress);
 
 static int cypress_probe(struct usb_interface *interface,
 			 const struct usb_device_id *id)
@@ -212,26 +216,11 @@ static int cypress_probe(struct usb_interface *interface,
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(interface, dev);
 
-	/* create device attribute files */
-	retval = device_create_file(&interface->dev, &dev_attr_port0);
-	if (retval)
-		goto error;
-	retval = device_create_file(&interface->dev, &dev_attr_port1);
-	if (retval)
-		goto error;
-
 	/* let the user know that the device is now attached */
 	dev_info(&interface->dev,
 		 "Cypress CY7C63xxx device now attached\n");
 	return 0;
 
-error:
-	device_remove_file(&interface->dev, &dev_attr_port0);
-	device_remove_file(&interface->dev, &dev_attr_port1);
-	usb_set_intfdata(interface, NULL);
-	usb_put_dev(dev->udev);
-	kfree(dev);
-
 error_mem:
 	return retval;
 }
@@ -242,9 +231,6 @@ static void cypress_disconnect(struct usb_interface *interface)
 
 	dev = usb_get_intfdata(interface);
 
-	/* remove device attribute files */
-	device_remove_file(&interface->dev, &dev_attr_port0);
-	device_remove_file(&interface->dev, &dev_attr_port1);
 	/* the intfdata can be set to NULL only after the
 	 * device files have been removed */
 	usb_set_intfdata(interface, NULL);
@@ -262,6 +248,7 @@ static struct usb_driver cypress_driver = {
 	.probe = cypress_probe,
 	.disconnect = cypress_disconnect,
 	.id_table = cypress_table,
+	.dev_groups = cypress_groups,
 };
 
 module_usb_driver(cypress_driver);
diff --git a/drivers/usb/misc/cytherm.c b/drivers/usb/misc/cytherm.c
index 8b15ab5e1450..3e3802aaefa3 100644
--- a/drivers/usb/misc/cytherm.c
+++ b/drivers/usb/misc/cytherm.c
@@ -36,20 +36,6 @@ struct usb_cytherm {
 };
 
 
-/* local function prototypes */
-static int cytherm_probe(struct usb_interface *interface, 
-			 const struct usb_device_id *id);
-static void cytherm_disconnect(struct usb_interface *interface);
-
-
-/* usb specific object needed to register this driver with the usb subsystem */
-static struct usb_driver cytherm_driver = {
-	.name =		"cytherm",
-	.probe =	cytherm_probe,
-	.disconnect =	cytherm_disconnect,
-	.id_table =	id_table,
-};
-
 /* Vendor requests */
 /* They all operate on one byte at a time */
 #define PING       0x00
@@ -304,6 +290,15 @@ static ssize_t port1_store(struct device *dev, struct device_attribute *attr, co
 }
 static DEVICE_ATTR_RW(port1);
 
+static struct attribute *cytherm_attrs[] = {
+	&dev_attr_brightness.attr,
+	&dev_attr_temp.attr,
+	&dev_attr_button.attr,
+	&dev_attr_port0.attr,
+	&dev_attr_port1.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(cytherm);
 
 static int cytherm_probe(struct usb_interface *interface, 
 			 const struct usb_device_id *id)
@@ -322,34 +317,10 @@ static int cytherm_probe(struct usb_interface *interface,
 
 	dev->brightness = 0xFF;
 
-	retval = device_create_file(&interface->dev, &dev_attr_brightness);
-	if (retval)
-		goto error;
-	retval = device_create_file(&interface->dev, &dev_attr_temp);
-	if (retval)
-		goto error;
-	retval = device_create_file(&interface->dev, &dev_attr_button);
-	if (retval)
-		goto error;
-	retval = device_create_file(&interface->dev, &dev_attr_port0);
-	if (retval)
-		goto error;
-	retval = device_create_file(&interface->dev, &dev_attr_port1);
-	if (retval)
-		goto error;
-
 	dev_info (&interface->dev,
 		  "Cypress thermometer device now attached\n");
 	return 0;
-error:
-	device_remove_file(&interface->dev, &dev_attr_brightness);
-	device_remove_file(&interface->dev, &dev_attr_temp);
-	device_remove_file(&interface->dev, &dev_attr_button);
-	device_remove_file(&interface->dev, &dev_attr_port0);
-	device_remove_file(&interface->dev, &dev_attr_port1);
-	usb_set_intfdata (interface, NULL);
-	usb_put_dev(dev->udev);
-	kfree(dev);
+
 error_mem:
 	return retval;
 }
@@ -360,12 +331,6 @@ static void cytherm_disconnect(struct usb_interface *interface)
 
 	dev = usb_get_intfdata (interface);
 
-	device_remove_file(&interface->dev, &dev_attr_brightness);
-	device_remove_file(&interface->dev, &dev_attr_temp);
-	device_remove_file(&interface->dev, &dev_attr_button);
-	device_remove_file(&interface->dev, &dev_attr_port0);
-	device_remove_file(&interface->dev, &dev_attr_port1);
-
 	/* first remove the files, then NULL the pointer */
 	usb_set_intfdata (interface, NULL);
 
@@ -376,6 +341,15 @@ static void cytherm_disconnect(struct usb_interface *interface)
 	dev_info(&interface->dev, "Cypress thermometer now disconnected\n");
 }
 
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver cytherm_driver = {
+	.name =		"cytherm",
+	.probe =	cytherm_probe,
+	.disconnect =	cytherm_disconnect,
+	.id_table =	id_table,
+	.dev_groups =	cytherm_groups,
+};
+
 module_usb_driver(cytherm_driver);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index e5c03c6d16e9..407fe7570f3b 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -310,7 +310,7 @@ static ssize_t enable_compliance_store(struct device *dev,
 }
 static DEVICE_ATTR_WO(enable_compliance);
 
-static struct attribute *lvs_attributes[] = {
+static struct attribute *lvs_attrs[] = {
 	&dev_attr_get_dev_desc.attr,
 	&dev_attr_u1_timeout.attr,
 	&dev_attr_u2_timeout.attr,
@@ -321,10 +321,7 @@ static struct attribute *lvs_attributes[] = {
 	&dev_attr_enable_compliance.attr,
 	NULL
 };
-
-static const struct attribute_group lvs_attr_group = {
-	.attrs = lvs_attributes,
-};
+ATTRIBUTE_GROUPS(lvs);
 
 static void lvs_rh_work(struct work_struct *work)
 {
@@ -439,12 +436,6 @@ static int lvs_rh_probe(struct usb_interface *intf,
 
 	INIT_WORK(&lvs->rh_work, lvs_rh_work);
 
-	ret = sysfs_create_group(&intf->dev.kobj, &lvs_attr_group);
-	if (ret < 0) {
-		dev_err(&intf->dev, "Failed to create sysfs node %d\n", ret);
-		goto free_urb;
-	}
-
 	pipe = usb_rcvintpipe(hdev, endpoint->bEndpointAddress);
 	maxp = usb_maxpacket(hdev, pipe, usb_pipeout(pipe));
 	usb_fill_int_urb(lvs->urb, hdev, pipe, &lvs->buffer[0], maxp,
@@ -453,13 +444,11 @@ static int lvs_rh_probe(struct usb_interface *intf,
 	ret = usb_submit_urb(lvs->urb, GFP_KERNEL);
 	if (ret < 0) {
 		dev_err(&intf->dev, "couldn't submit lvs urb %d\n", ret);
-		goto sysfs_remove;
+		goto free_urb;
 	}
 
 	return ret;
 
-sysfs_remove:
-	sysfs_remove_group(&intf->dev.kobj, &lvs_attr_group);
 free_urb:
 	usb_free_urb(lvs->urb);
 	return ret;
@@ -469,7 +458,6 @@ static void lvs_rh_disconnect(struct usb_interface *intf)
 {
 	struct lvs_rh *lvs = usb_get_intfdata(intf);
 
-	sysfs_remove_group(&intf->dev.kobj, &lvs_attr_group);
 	usb_poison_urb(lvs->urb); /* used in scheduled work */
 	flush_work(&lvs->rh_work);
 	usb_free_urb(lvs->urb);
@@ -479,6 +467,7 @@ static struct usb_driver lvs_driver = {
 	.name =		"lvs",
 	.probe =	lvs_rh_probe,
 	.disconnect =	lvs_rh_disconnect,
+	.dev_groups =	lvs_groups,
 };
 
 module_usb_driver(lvs_driver);
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index a32d61a79ab8..30cae5e1954d 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -51,7 +51,6 @@ struct rio_usb_data {
         char *obuf, *ibuf;              /* transfer buffers */
         char bulk_in_ep, bulk_out_ep;   /* Endpoint assignments */
         wait_queue_head_t wait_q;       /* for timeouts */
-	struct mutex lock;          /* general race avoidance */
 };
 
 static DEFINE_MUTEX(rio500_mutex);
@@ -63,10 +62,8 @@ static int open_rio(struct inode *inode, struct file *file)
 
 	/* against disconnect() */
 	mutex_lock(&rio500_mutex);
-	mutex_lock(&(rio->lock));
 
 	if (rio->isopen || !rio->present) {
-		mutex_unlock(&(rio->lock));
 		mutex_unlock(&rio500_mutex);
 		return -EBUSY;
 	}
@@ -74,7 +71,6 @@ static int open_rio(struct inode *inode, struct file *file)
 
 	init_waitqueue_head(&rio->wait_q);
 
-	mutex_unlock(&(rio->lock));
 
 	dev_info(&rio->rio_dev->dev, "Rio opened.\n");
 	mutex_unlock(&rio500_mutex);
@@ -88,7 +84,6 @@ static int close_rio(struct inode *inode, struct file *file)
 
 	/* against disconnect() */
 	mutex_lock(&rio500_mutex);
-	mutex_lock(&(rio->lock));
 
 	rio->isopen = 0;
 	if (!rio->present) {
@@ -100,7 +95,6 @@ static int close_rio(struct inode *inode, struct file *file)
 	} else {
 		dev_info(&rio->rio_dev->dev, "Rio closed.\n");
 	}
-	mutex_unlock(&(rio->lock));
 	mutex_unlock(&rio500_mutex);
 	return 0;
 }
@@ -115,7 +109,7 @@ static long ioctl_rio(struct file *file, unsigned int cmd, unsigned long arg)
 	int retries;
 	int retval=0;
 
-	mutex_lock(&(rio->lock));
+	mutex_lock(&rio500_mutex);
         /* Sanity check to make sure rio is connected, powered, etc */
         if (rio->present == 0 || rio->rio_dev == NULL) {
 		retval = -ENODEV;
@@ -259,7 +253,7 @@ static long ioctl_rio(struct file *file, unsigned int cmd, unsigned long arg)
 
 
 err_out:
-	mutex_unlock(&(rio->lock));
+	mutex_unlock(&rio500_mutex);
 	return retval;
 }
 
@@ -279,12 +273,12 @@ write_rio(struct file *file, const char __user *buffer,
 	int errn = 0;
 	int intr;
 
-	intr = mutex_lock_interruptible(&(rio->lock));
+	intr = mutex_lock_interruptible(&rio500_mutex);
 	if (intr)
 		return -EINTR;
         /* Sanity check to make sure rio is connected, powered, etc */
         if (rio->present == 0 || rio->rio_dev == NULL) {
-		mutex_unlock(&(rio->lock));
+		mutex_unlock(&rio500_mutex);
 		return -ENODEV;
 	}
 
@@ -307,7 +301,7 @@ write_rio(struct file *file, const char __user *buffer,
 				goto error;
 			}
 			if (signal_pending(current)) {
-				mutex_unlock(&(rio->lock));
+				mutex_unlock(&rio500_mutex);
 				return bytes_written ? bytes_written : -EINTR;
 			}
 
@@ -345,12 +339,12 @@ write_rio(struct file *file, const char __user *buffer,
 		buffer += copy_size;
 	} while (count > 0);
 
-	mutex_unlock(&(rio->lock));
+	mutex_unlock(&rio500_mutex);
 
 	return bytes_written ? bytes_written : -EIO;
 
 error:
-	mutex_unlock(&(rio->lock));
+	mutex_unlock(&rio500_mutex);
 	return errn;
 }
 
@@ -367,12 +361,12 @@ read_rio(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
 	char *ibuf;
 	int intr;
 
-	intr = mutex_lock_interruptible(&(rio->lock));
+	intr = mutex_lock_interruptible(&rio500_mutex);
 	if (intr)
 		return -EINTR;
 	/* Sanity check to make sure rio is connected, powered, etc */
         if (rio->present == 0 || rio->rio_dev == NULL) {
-		mutex_unlock(&(rio->lock));
+		mutex_unlock(&rio500_mutex);
 		return -ENODEV;
 	}
 
@@ -383,11 +377,11 @@ read_rio(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
 
 	while (count > 0) {
 		if (signal_pending(current)) {
-			mutex_unlock(&(rio->lock));
+			mutex_unlock(&rio500_mutex);
 			return read_count ? read_count : -EINTR;
 		}
 		if (!rio->rio_dev) {
-			mutex_unlock(&(rio->lock));
+			mutex_unlock(&rio500_mutex);
 			return -ENODEV;
 		}
 		this_read = (count >= IBUF_SIZE) ? IBUF_SIZE : count;
@@ -405,7 +399,7 @@ read_rio(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
 			count = this_read = partial;
 		} else if (result == -ETIMEDOUT || result == 15) {	/* FIXME: 15 ??? */
 			if (!maxretry--) {
-				mutex_unlock(&(rio->lock));
+				mutex_unlock(&rio500_mutex);
 				dev_err(&rio->rio_dev->dev,
 					"read_rio: maxretry timeout\n");
 				return -ETIME;
@@ -415,19 +409,19 @@ read_rio(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
 			finish_wait(&rio->wait_q, &wait);
 			continue;
 		} else if (result != -EREMOTEIO) {
-			mutex_unlock(&(rio->lock));
+			mutex_unlock(&rio500_mutex);
 			dev_err(&rio->rio_dev->dev,
 				"Read Whoops - result:%d partial:%u this_read:%u\n",
 				result, partial, this_read);
 			return -EIO;
 		} else {
-			mutex_unlock(&(rio->lock));
+			mutex_unlock(&rio500_mutex);
 			return (0);
 		}
 
 		if (this_read) {
 			if (copy_to_user(buffer, ibuf, this_read)) {
-				mutex_unlock(&(rio->lock));
+				mutex_unlock(&rio500_mutex);
 				return -EFAULT;
 			}
 			count -= this_read;
@@ -435,7 +429,7 @@ read_rio(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
 			buffer += this_read;
 		}
 	}
-	mutex_unlock(&(rio->lock));
+	mutex_unlock(&rio500_mutex);
 	return read_count;
 }
 
@@ -460,53 +454,55 @@ static int probe_rio(struct usb_interface *intf,
 {
 	struct usb_device *dev = interface_to_usbdev(intf);
 	struct rio_usb_data *rio = &rio_instance;
-	int retval = 0;
+	int retval = -ENOMEM;
+	char *ibuf, *obuf;
 
-	mutex_lock(&rio500_mutex);
 	if (rio->present) {
 		dev_info(&intf->dev, "Second USB Rio at address %d refused\n", dev->devnum);
-		retval = -EBUSY;
-		goto bail_out;
-	} else {
-		dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum);
+		return -EBUSY;
 	}
+	dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum);
 
-	retval = usb_register_dev(intf, &usb_rio_class);
-	if (retval) {
-		dev_err(&dev->dev,
-			"Not able to get a minor for this device.\n");
-		retval = -ENOMEM;
-		goto bail_out;
-	}
-
-	rio->rio_dev = dev;
-
-	if (!(rio->obuf = kmalloc(OBUF_SIZE, GFP_KERNEL))) {
+	obuf = kmalloc(OBUF_SIZE, GFP_KERNEL);
+	if (!obuf) {
 		dev_err(&dev->dev,
 			"probe_rio: Not enough memory for the output buffer\n");
-		usb_deregister_dev(intf, &usb_rio_class);
-		retval = -ENOMEM;
-		goto bail_out;
+		goto err_obuf;
 	}
-	dev_dbg(&intf->dev, "obuf address:%p\n", rio->obuf);
+	dev_dbg(&intf->dev, "obuf address: %p\n", obuf);
 
-	if (!(rio->ibuf = kmalloc(IBUF_SIZE, GFP_KERNEL))) {
+	ibuf = kmalloc(IBUF_SIZE, GFP_KERNEL);
+	if (!ibuf) {
 		dev_err(&dev->dev,
 			"probe_rio: Not enough memory for the input buffer\n");
-		usb_deregister_dev(intf, &usb_rio_class);
-		kfree(rio->obuf);
-		retval = -ENOMEM;
-		goto bail_out;
+		goto err_ibuf;
 	}
-	dev_dbg(&intf->dev, "ibuf address:%p\n", rio->ibuf);
-
-	mutex_init(&(rio->lock));
+	dev_dbg(&intf->dev, "ibuf address: %p\n", ibuf);
 
-	usb_set_intfdata (intf, rio);
+	mutex_lock(&rio500_mutex);
+	rio->rio_dev = dev;
+	rio->ibuf = ibuf;
+	rio->obuf = obuf;
 	rio->present = 1;
-bail_out:
 	mutex_unlock(&rio500_mutex);
 
+	retval = usb_register_dev(intf, &usb_rio_class);
+	if (retval) {
+		dev_err(&dev->dev,
+			"Not able to get a minor for this device.\n");
+		goto err_register;
+	}
+
+	usb_set_intfdata(intf, rio);
+	return retval;
+
+ err_register:
+	mutex_lock(&rio500_mutex);
+	rio->present = 0;
+	mutex_unlock(&rio500_mutex);
+ err_ibuf:
+	kfree(obuf);
+ err_obuf:
 	return retval;
 }
 
@@ -515,16 +511,14 @@ static void disconnect_rio(struct usb_interface *intf)
 	struct rio_usb_data *rio = usb_get_intfdata (intf);
 
 	usb_set_intfdata (intf, NULL);
-	mutex_lock(&rio500_mutex);
 	if (rio) {
 		usb_deregister_dev(intf, &usb_rio_class);
 
-		mutex_lock(&(rio->lock));
+		mutex_lock(&rio500_mutex);
 		if (rio->isopen) {
 			rio->isopen = 0;
 			/* better let it finish - the release will do whats needed */
 			rio->rio_dev = NULL;
-			mutex_unlock(&(rio->lock));
 			mutex_unlock(&rio500_mutex);
 			return;
 		}
@@ -534,9 +528,8 @@ static void disconnect_rio(struct usb_interface *intf)
 		dev_info(&intf->dev, "USB Rio disconnected.\n");
 
 		rio->present = 0;
-		mutex_unlock(&(rio->lock));
+		mutex_unlock(&rio500_mutex);
 	}
-	mutex_unlock(&rio500_mutex);
 }
 
 static const struct usb_device_id rio_table[] = {
diff --git a/drivers/usb/misc/trancevibrator.c b/drivers/usb/misc/trancevibrator.c
index ac357ce2d1a6..a3dfc77578ea 100644
--- a/drivers/usb/misc/trancevibrator.c
+++ b/drivers/usb/misc/trancevibrator.c
@@ -71,9 +71,14 @@ static ssize_t speed_store(struct device *dev, struct device_attribute *attr,
 	}
 	return count;
 }
-
 static DEVICE_ATTR_RW(speed);
 
+static struct attribute *tv_attrs[] = {
+	&dev_attr_speed.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(tv);
+
 static int tv_probe(struct usb_interface *interface,
 		    const struct usb_device_id *id)
 {
@@ -89,15 +94,9 @@ static int tv_probe(struct usb_interface *interface,
 
 	dev->udev = usb_get_dev(udev);
 	usb_set_intfdata(interface, dev);
-	retval = device_create_file(&interface->dev, &dev_attr_speed);
-	if (retval)
-		goto error_create_file;
 
 	return 0;
 
-error_create_file:
-	usb_put_dev(udev);
-	usb_set_intfdata(interface, NULL);
 error:
 	kfree(dev);
 	return retval;
@@ -108,7 +107,6 @@ static void tv_disconnect(struct usb_interface *interface)
 	struct trancevibrator *dev;
 
 	dev = usb_get_intfdata (interface);
-	device_remove_file(&interface->dev, &dev_attr_speed);
 	usb_set_intfdata(interface, NULL);
 	usb_put_dev(dev->udev);
 	kfree(dev);
@@ -120,6 +118,7 @@ static struct usb_driver tv_driver = {
 	.probe =	tv_probe,
 	.disconnect =	tv_disconnect,
 	.id_table =	id_table,
+	.dev_groups =	tv_groups,
 };
 
 module_usb_driver(tv_driver);
diff --git a/drivers/usb/misc/usbsevseg.c b/drivers/usb/misc/usbsevseg.c
index 1923d5b6d9c9..551074f5b7ad 100644
--- a/drivers/usb/misc/usbsevseg.c
+++ b/drivers/usb/misc/usbsevseg.c
@@ -316,7 +316,7 @@ MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
 MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
 MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);
 
-static struct attribute *dev_attrs[] = {
+static struct attribute *sevseg_attrs[] = {
 	&dev_attr_powered.attr,
 	&dev_attr_text.attr,
 	&dev_attr_textmode.attr,
@@ -325,10 +325,7 @@ static struct attribute *dev_attrs[] = {
 	&dev_attr_mode_lsb.attr,
 	NULL
 };
-
-static const struct attribute_group dev_attr_grp = {
-	.attrs = dev_attrs,
-};
+ATTRIBUTE_GROUPS(sevseg);
 
 static int sevseg_probe(struct usb_interface *interface,
 	const struct usb_device_id *id)
@@ -354,17 +351,9 @@ static int sevseg_probe(struct usb_interface *interface,
 	mydev->mode_msb = 0x06; /* 6 characters */
 	mydev->mode_lsb = 0x3f; /* scanmode for 6 chars */
 
-	rc = sysfs_create_group(&interface->dev.kobj, &dev_attr_grp);
-	if (rc)
-		goto error;
-
 	dev_info(&interface->dev, "USB 7 Segment device now attached\n");
 	return 0;
 
-error:
-	usb_set_intfdata(interface, NULL);
-	usb_put_dev(mydev->udev);
-	kfree(mydev);
 error_mem:
 	return rc;
 }
@@ -374,7 +363,6 @@ static void sevseg_disconnect(struct usb_interface *interface)
 	struct usb_sevsegdev *mydev;
 
 	mydev = usb_get_intfdata(interface);
-	sysfs_remove_group(&interface->dev.kobj, &dev_attr_grp);
 	usb_set_intfdata(interface, NULL);
 	usb_put_dev(mydev->udev);
 	kfree(mydev);
@@ -423,6 +411,7 @@ static struct usb_driver sevseg_driver = {
 	.resume =	sevseg_resume,
 	.reset_resume =	sevseg_reset_resume,
 	.id_table =	id_table,
+	.dev_groups =	sevseg_groups,
 	.supports_autosuspend = 1,
 };
 
diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig
index 928c2cd6fc00..bf98fd36341d 100644
--- a/drivers/usb/mtu3/Kconfig
+++ b/drivers/usb/mtu3/Kconfig
@@ -44,6 +44,7 @@ config USB_MTU3_DUAL_ROLE
 	bool "Dual Role mode"
 	depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3))
 	depends on (EXTCON=y || EXTCON=USB_MTU3)
+	select USB_ROLE_SWITCH
 	help
 	  This is the default mode of working of MTU3 controller where
 	  both host and gadget features are enabled.
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index 76ecf12fdf62..6087be236a35 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -199,6 +199,9 @@ struct mtu3_gpd_ring {
 * @id_nb : notifier for iddig(idpin) detection
 * @id_work : work of iddig detection notifier
 * @id_event : event of iddig detecion notifier
+* @role_sw : use USB Role Switch to support dual-role switch, can't use
+*		extcon at the same time, and extcon is deprecated.
+* @role_sw_used : true when the USB Role Switch is used.
 * @is_u3_drd: whether port0 supports usb3.0 dual-role device or not
 * @manual_drd_enabled: it's true when supports dual-role device by debugfs
 *		to switch host/device modes depending on user input.
@@ -212,6 +215,8 @@ struct otg_switch_mtk {
 	struct notifier_block id_nb;
 	struct work_struct id_work;
 	unsigned long id_event;
+	struct usb_role_switch *role_sw;
+	bool role_sw_used;
 	bool is_u3_drd;
 	bool manual_drd_enabled;
 };
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index f8bd1d57e795..c3d5c1206eec 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -835,10 +835,8 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 		return -ENOMEM;
 
 	mtu->irq = platform_get_irq(pdev, 0);
-	if (mtu->irq < 0) {
-		dev_err(dev, "fail to get irq number\n");
+	if (mtu->irq < 0)
 		return mtu->irq;
-	}
 	dev_info(dev, "irq %d\n", mtu->irq);
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac");
diff --git a/drivers/usb/mtu3/mtu3_debugfs.c b/drivers/usb/mtu3/mtu3_debugfs.c
index 62c57ddc554e..c96e5dab0a48 100644
--- a/drivers/usb/mtu3/mtu3_debugfs.c
+++ b/drivers/usb/mtu3/mtu3_debugfs.c
@@ -453,9 +453,9 @@ static ssize_t ssusb_mode_write(struct file *file, const char __user *ubuf,
 		return -EFAULT;
 
 	if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
-		ssusb_mode_manual_switch(ssusb, 1);
+		ssusb_mode_switch(ssusb, 1);
 	} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
-		ssusb_mode_manual_switch(ssusb, 0);
+		ssusb_mode_switch(ssusb, 0);
 	} else {
 		dev_err(ssusb->dev, "wrong or duplicated setting\n");
 		return -EINVAL;
diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c
index 5fcb71af875a..08e18448e8b8 100644
--- a/drivers/usb/mtu3/mtu3_dr.c
+++ b/drivers/usb/mtu3/mtu3_dr.c
@@ -7,6 +7,8 @@
  * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
  */
 
+#include <linux/usb/role.h>
+
 #include "mtu3.h"
 #include "mtu3_dr.h"
 #include "mtu3_debug.h"
@@ -280,7 +282,7 @@ static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx)
  * This is useful in special cases, such as uses TYPE-A receptacle but also
  * wants to support dual-role mode.
  */
-void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
+void ssusb_mode_switch(struct ssusb_mtk *ssusb, int to_host)
 {
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
 
@@ -318,6 +320,47 @@ void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 	mtu3_writel(ssusb->ippc_base, SSUSB_U2_CTRL(0), value);
 }
 
+static int ssusb_role_sw_set(struct device *dev, enum usb_role role)
+{
+	struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
+	bool to_host = false;
+
+	if (role == USB_ROLE_HOST)
+		to_host = true;
+
+	if (to_host ^ ssusb->is_host)
+		ssusb_mode_switch(ssusb, to_host);
+
+	return 0;
+}
+
+static enum usb_role ssusb_role_sw_get(struct device *dev)
+{
+	struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
+	enum usb_role role;
+
+	role = ssusb->is_host ? USB_ROLE_HOST : USB_ROLE_DEVICE;
+
+	return role;
+}
+
+static int ssusb_role_sw_register(struct otg_switch_mtk *otg_sx)
+{
+	struct usb_role_switch_desc role_sx_desc = { 0 };
+	struct ssusb_mtk *ssusb =
+		container_of(otg_sx, struct ssusb_mtk, otg_switch);
+
+	if (!otg_sx->role_sw_used)
+		return 0;
+
+	role_sx_desc.set = ssusb_role_sw_set;
+	role_sx_desc.get = ssusb_role_sw_get;
+	role_sx_desc.fwnode = dev_fwnode(ssusb->dev);
+	otg_sx->role_sw = usb_role_switch_register(ssusb->dev, &role_sx_desc);
+
+	return PTR_ERR_OR_ZERO(otg_sx->role_sw);
+}
+
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
 {
 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
@@ -328,6 +371,8 @@ int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
 
 	if (otg_sx->manual_drd_enabled)
 		ssusb_dr_debugfs_init(ssusb);
+	else if (otg_sx->role_sw_used)
+		ret = ssusb_role_sw_register(otg_sx);
 	else
 		ret = ssusb_extcon_register(otg_sx);
 
@@ -340,4 +385,5 @@ void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
 
 	cancel_work_sync(&otg_sx->id_work);
 	cancel_work_sync(&otg_sx->vbus_work);
+	usb_role_switch_unregister(otg_sx->role_sw);
 }
diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h
index ba6fe357ce29..5e58c4dbd54a 100644
--- a/drivers/usb/mtu3/mtu3_dr.h
+++ b/drivers/usb/mtu3/mtu3_dr.h
@@ -71,7 +71,7 @@ static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
 #if IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb);
 void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb);
-void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host);
+void ssusb_mode_switch(struct ssusb_mtk *ssusb, int to_host);
 int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on);
 void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 			  enum mtu3_dr_force_mode mode);
@@ -86,8 +86,8 @@ static inline int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
 static inline void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
 {}
 
-static inline void
-ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host) {}
+static inline void ssusb_mode_switch(struct ssusb_mtk *ssusb, int to_host)
+{}
 
 static inline int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
 {
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index fd0f6c5dfbc1..9c256ea3cdf5 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -299,8 +299,9 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 	otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd");
 	otg_sx->manual_drd_enabled =
 		of_property_read_bool(node, "enable-manual-drd");
+	otg_sx->role_sw_used = of_property_read_bool(node, "usb-role-switch");
 
-	if (of_property_read_bool(node, "extcon")) {
+	if (!otg_sx->role_sw_used && of_property_read_bool(node, "extcon")) {
 		otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0);
 		if (IS_ERR(otg_sx->edev)) {
 			dev_err(ssusb->dev, "couldn't get extcon device\n");
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 9f5a4819a744..bd63450af76a 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1721,7 +1721,7 @@ mode_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct musb *musb = dev_to_musb(dev);
 	unsigned long flags;
-	int ret = -EINVAL;
+	int ret;
 
 	spin_lock_irqsave(&musb->lock, flags);
 	ret = sprintf(buf, "%s\n", usb_otg_state_string(musb->xceiv->otg->state));
@@ -1829,16 +1829,13 @@ static ssize_t srp_store(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_WO(srp);
 
-static struct attribute *musb_attributes[] = {
+static struct attribute *musb_attrs[] = {
 	&dev_attr_mode.attr,
 	&dev_attr_vbus.attr,
 	&dev_attr_srp.attr,
 	NULL
 };
-
-static const struct attribute_group musb_attr_group = {
-	.attrs = musb_attributes,
-};
+ATTRIBUTE_GROUPS(musb);
 
 #define MUSB_QUIRK_B_INVALID_VBUS_91	(MUSB_DEVCTL_BDEVICE | \
 					 (2 << MUSB_DEVCTL_VBUS_SHIFT) | \
@@ -2038,10 +2035,6 @@ static void musb_free(struct musb *musb)
 	 * cleanup after everything's been de-activated.
 	 */
 
-#ifdef CONFIG_SYSFS
-	sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
-#endif
-
 	if (musb->nIrq >= 0) {
 		if (musb->irq_wake)
 			disable_irq_wake(musb->nIrq);
@@ -2390,22 +2383,12 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 
 	musb_init_debugfs(musb);
 
-	status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
-	if (status)
-		goto fail5;
-
 	musb->is_initialized = 1;
 	pm_runtime_mark_last_busy(musb->controller);
 	pm_runtime_put_autosuspend(musb->controller);
 
 	return 0;
 
-fail5:
-	musb_exit_debugfs(musb);
-
-	musb_gadget_cleanup(musb);
-	musb_host_cleanup(musb);
-
 fail3:
 	cancel_delayed_work_sync(&musb->irq_work);
 	cancel_delayed_work_sync(&musb->finish_resume_work);
@@ -2798,6 +2781,7 @@ static struct platform_driver musb_driver = {
 		.name		= (char *)musb_driver_name,
 		.bus		= &platform_bus_type,
 		.pm		= MUSB_DEV_PM_OPS,
+		.dev_groups	= musb_groups,
 	},
 	.probe		= musb_probe,
 	.remove		= musb_remove,
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index eb308ec35c66..5a44b70372d9 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -2689,7 +2689,7 @@ static const struct hc_driver musb_hc_driver = {
 	.description		= "musb-hcd",
 	.product_desc		= "MUSB HDRC host driver",
 	.hcd_priv_size		= sizeof(struct musb *),
-	.flags			= HCD_USB2 | HCD_MEMORY,
+	.flags			= HCD_USB2 | HCD_DMA | HCD_MEMORY,
 
 	/* not using irq handler or reset hooks from usbcore, since
 	 * those must be shared with peripheral code for OTG configs
diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index aaf363f19714..4bb4b1d42f32 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -330,6 +330,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
 	switch (lsts) {
 	case USB_LINK_ACA_RID_B_8505:
 		event = UX500_MUSB_RIDB;
+		/* Fall through */
 	case USB_LINK_NOT_CONFIGURED_8505:
 	case USB_LINK_RESERVED0_8505:
 	case USB_LINK_RESERVED1_8505:
@@ -350,6 +351,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
 
 	case USB_LINK_ACA_RID_C_NM_8505:
 		event = UX500_MUSB_RIDC;
+		/* Fall through */
 	case USB_LINK_STD_HOST_NC_8505:
 	case USB_LINK_STD_HOST_C_NS_8505:
 	case USB_LINK_STD_HOST_C_S_8505:
@@ -368,6 +370,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
 	case USB_LINK_ACA_RID_A_8505:
 	case USB_LINK_ACA_DOCK_CHGR_8505:
 		event = UX500_MUSB_RIDA;
+		/* Fall through */
 	case USB_LINK_HM_IDGND_8505:
 		if (ab->mode == USB_IDLE) {
 			ab->mode = USB_HOST;
@@ -422,6 +425,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
 	switch (lsts) {
 	case USB_LINK_ACA_RID_B_8500:
 		event = UX500_MUSB_RIDB;
+		/* Fall through */
 	case USB_LINK_NOT_CONFIGURED_8500:
 	case USB_LINK_NOT_VALID_LINK_8500:
 		ab->mode = USB_IDLE;
@@ -438,6 +442,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
 	case USB_LINK_ACA_RID_C_HS_8500:
 	case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
 		event = UX500_MUSB_RIDC;
+		/* Fall through */
 	case USB_LINK_STD_HOST_NC_8500:
 	case USB_LINK_STD_HOST_C_NS_8500:
 	case USB_LINK_STD_HOST_C_S_8500:
@@ -457,6 +462,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
 
 	case USB_LINK_ACA_RID_A_8500:
 		event = UX500_MUSB_RIDA;
+		/* Fall through */
 	case USB_LINK_HM_IDGND_8500:
 		if (ab->mode == USB_IDLE) {
 			ab->mode = USB_HOST;
@@ -712,10 +718,8 @@ static int ab8500_usb_irq_setup(struct platform_device *pdev,
 
 	if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) {
 		irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
-		if (irq < 0) {
-			dev_err(&pdev->dev, "Link status irq not found\n");
+		if (irq < 0)
 			return irq;
-		}
 		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 				ab8500_usb_link_status_irq,
 				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
@@ -728,10 +732,8 @@ static int ab8500_usb_irq_setup(struct platform_device *pdev,
 
 	if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) {
 		irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
-		if (irq < 0) {
-			dev_err(&pdev->dev, "ID fall irq not found\n");
+		if (irq < 0)
 			return irq;
-		}
 		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 				ab8500_usb_disconnect_irq,
 				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
@@ -744,10 +746,8 @@ static int ab8500_usb_irq_setup(struct platform_device *pdev,
 
 	if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) {
 		irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
-		if (irq < 0) {
-			dev_err(&pdev->dev, "VBUS fall irq not found\n");
+		if (irq < 0)
 			return irq;
-		}
 		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 				ab8500_usb_disconnect_irq,
 				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index f7c96d209eda..b451f4695f3f 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -65,7 +65,7 @@ struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
 
 static struct list_head active_timers;
 
-static struct fsl_otg_config fsl_otg_initdata = {
+static const struct fsl_otg_config fsl_otg_initdata = {
 	.otg_port = 1,
 };
 
@@ -1043,6 +1043,11 @@ static ssize_t show_fsl_usb2_otg_state(struct device *dev,
 
 static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
 
+static struct attribute *fsl_otg_attrs[] = {
+	&dev_attr_fsl_usb2_otg_state.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(fsl_otg);
 
 /* Char driver interface to control some OTG input */
 
@@ -1132,10 +1137,6 @@ static int fsl_otg_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
-	if (ret)
-		dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
-
 	return ret;
 }
 
@@ -1152,8 +1153,6 @@ static int fsl_otg_remove(struct platform_device *pdev)
 	kfree(fsl_otg_dev->phy.otg);
 	kfree(fsl_otg_dev);
 
-	device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
-
 	unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
 
 	if (pdata->exit)
@@ -1168,6 +1167,7 @@ struct platform_driver fsl_otg_driver = {
 	.driver = {
 		.name = driver_name,
 		.owner = THIS_MODULE,
+		.dev_groups = fsl_otg_groups,
 	},
 };
 
diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c
index cf7ecdc9a9d4..06b47f1028b3 100644
--- a/drivers/usb/phy/phy-mv-usb.c
+++ b/drivers/usb/phy/phy-mv-usb.c
@@ -641,12 +641,15 @@ static const struct attribute_group inputs_attr_group = {
 	.attrs = inputs_attrs,
 };
 
+static const struct attribute_group *mv_otg_groups[] = {
+	&inputs_attr_group,
+	NULL,
+};
+
 static int mv_otg_remove(struct platform_device *pdev)
 {
 	struct mv_otg *mvotg = platform_get_drvdata(pdev);
 
-	sysfs_remove_group(&mvotg->pdev->dev.kobj, &inputs_attr_group);
-
 	if (mvotg->qwork) {
 		flush_workqueue(mvotg->qwork);
 		destroy_workqueue(mvotg->qwork);
@@ -809,13 +812,6 @@ static int mv_otg_probe(struct platform_device *pdev)
 		goto err_disable_clk;
 	}
 
-	retval = sysfs_create_group(&pdev->dev.kobj, &inputs_attr_group);
-	if (retval < 0) {
-		dev_dbg(&pdev->dev,
-			"Can't register sysfs attr group: %d\n", retval);
-		goto err_remove_phy;
-	}
-
 	spin_lock_init(&mvotg->wq_lock);
 	if (spin_trylock(&mvotg->wq_lock)) {
 		mv_otg_run_state_machine(mvotg, 2 * HZ);
@@ -828,8 +824,6 @@ static int mv_otg_probe(struct platform_device *pdev)
 
 	return 0;
 
-err_remove_phy:
-	usb_remove_phy(&mvotg->phy);
 err_disable_clk:
 	mv_otg_disable_internal(mvotg);
 err_destroy_workqueue:
@@ -883,6 +877,7 @@ static struct platform_driver mv_otg_driver = {
 	.remove = mv_otg_remove,
 	.driver = {
 		   .name = driver_name,
+		   .dev_groups = mv_otg_groups,
 		   },
 #ifdef CONFIG_PM
 	.suspend = mv_otg_suspend,
diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index 0981abc3d1ad..baebb1f5a973 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -312,15 +312,12 @@ static ssize_t otg_mode_store(struct device *device,
 }
 static DEVICE_ATTR_RW(otg_mode);
 
-static struct attribute *tahvo_attributes[] = {
+static struct attribute *tahvo_attrs[] = {
 	&dev_attr_vbus.attr,
 	&dev_attr_otg_mode.attr,
 	NULL
 };
-
-static const struct attribute_group tahvo_attr_group = {
-	.attrs = tahvo_attributes,
-};
+ATTRIBUTE_GROUPS(tahvo);
 
 static int tahvo_usb_probe(struct platform_device *pdev)
 {
@@ -406,17 +403,8 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 		goto err_remove_phy;
 	}
 
-	/* Attributes */
-	ret = sysfs_create_group(&pdev->dev.kobj, &tahvo_attr_group);
-	if (ret) {
-		dev_err(&pdev->dev, "cannot create sysfs group: %d\n", ret);
-		goto err_free_irq;
-	}
-
 	return 0;
 
-err_free_irq:
-	free_irq(tu->irq, tu);
 err_remove_phy:
 	usb_remove_phy(&tu->phy);
 err_disable_clk:
@@ -430,7 +418,6 @@ static int tahvo_usb_remove(struct platform_device *pdev)
 {
 	struct tahvo_usb *tu = platform_get_drvdata(pdev);
 
-	sysfs_remove_group(&pdev->dev.kobj, &tahvo_attr_group);
 	free_irq(tu->irq, tu);
 	usb_remove_phy(&tu->phy);
 	if (!IS_ERR(tu->ick))
@@ -444,6 +431,7 @@ static struct platform_driver tahvo_usb_driver = {
 	.remove		= tahvo_usb_remove,
 	.driver		= {
 		.name	= "tahvo-usb",
+		.dev_groups = tahvo_groups,
 	},
 };
 module_platform_driver(tahvo_usb_driver);
diff --git a/drivers/usb/phy/phy-twl6030-usb.c b/drivers/usb/phy/phy-twl6030-usb.c
index dade34d70419..bfebf1f2e991 100644
--- a/drivers/usb/phy/phy-twl6030-usb.c
+++ b/drivers/usb/phy/phy-twl6030-usb.c
@@ -196,6 +196,12 @@ static ssize_t vbus_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(vbus);
 
+static struct attribute *twl6030_attrs[] = {
+	&dev_attr_vbus.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(twl6030);
+
 static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
 {
 	struct twl6030_usb *twl = _twl;
@@ -361,8 +367,6 @@ static int twl6030_usb_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, twl);
-	if (device_create_file(&pdev->dev, &dev_attr_vbus))
-		dev_warn(&pdev->dev, "could not create sysfs file\n");
 
 	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
 	INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work);
@@ -373,7 +377,6 @@ static int twl6030_usb_probe(struct platform_device *pdev)
 	if (status < 0) {
 		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
 			twl->irq1, status);
-		device_remove_file(twl->dev, &dev_attr_vbus);
 		return status;
 	}
 
@@ -384,7 +387,6 @@ static int twl6030_usb_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
 			twl->irq2, status);
 		free_irq(twl->irq1, twl);
-		device_remove_file(twl->dev, &dev_attr_vbus);
 		return status;
 	}
 
@@ -408,7 +410,6 @@ static int twl6030_usb_remove(struct platform_device *pdev)
 	free_irq(twl->irq1, twl);
 	free_irq(twl->irq2, twl);
 	regulator_put(twl->usb3v3);
-	device_remove_file(twl->dev, &dev_attr_vbus);
 	cancel_work_sync(&twl->set_vbus_work);
 
 	return 0;
@@ -426,6 +427,7 @@ static struct platform_driver twl6030_usb_driver = {
 	.driver		= {
 		.name	= "twl6030_usb",
 		.of_match_table = of_match_ptr(twl6030_usb_id_table),
+		.dev_groups = twl6030_groups,
 	},
 };
 
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
index ddd3be48f948..ae54221011c3 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -1283,7 +1283,7 @@ static const struct hc_driver usbhsh_driver = {
 	/*
 	 * generic hardware linkage
 	 */
-	.flags =		HCD_USB2,
+	.flags =		HCD_DMA | HCD_USB2,
 
 	.start =		usbhsh_host_start,
 	.stop =			usbhsh_host_stop,
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c
index 0526efbc4922..94b4e7db2b94 100644
--- a/drivers/usb/roles/class.c
+++ b/drivers/usb/roles/class.c
@@ -102,6 +102,19 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
 	return dev ? to_role_switch(dev) : ERR_PTR(-EPROBE_DEFER);
 }
 
+static struct usb_role_switch *
+usb_role_switch_is_parent(struct fwnode_handle *fwnode)
+{
+	struct fwnode_handle *parent = fwnode_get_parent(fwnode);
+	struct device *dev;
+
+	if (!parent || !fwnode_property_present(parent, "usb-role-switch"))
+		return NULL;
+
+	dev = class_find_device_by_fwnode(role_class, parent);
+	return dev ? to_role_switch(dev) : ERR_PTR(-EPROBE_DEFER);
+}
+
 /**
  * usb_role_switch_get - Find USB role switch linked with the caller
  * @dev: The caller device
@@ -113,8 +126,10 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev)
 {
 	struct usb_role_switch *sw;
 
-	sw = device_connection_find_match(dev, "usb-role-switch", NULL,
-					  usb_role_switch_match);
+	sw = usb_role_switch_is_parent(dev_fwnode(dev));
+	if (!sw)
+		sw = device_connection_find_match(dev, "usb-role-switch", NULL,
+						  usb_role_switch_match);
 
 	if (!IS_ERR_OR_NULL(sw))
 		WARN_ON(!try_module_get(sw->dev.parent->driver->owner));
@@ -124,6 +139,28 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev)
 EXPORT_SYMBOL_GPL(usb_role_switch_get);
 
 /**
+ * fwnode_usb_role_switch_get - Find USB role switch linked with the caller
+ * @fwnode: The caller device node
+ *
+ * This is similar to the usb_role_switch_get() function above, but it searches
+ * the switch using fwnode instead of device entry.
+ */
+struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *fwnode)
+{
+	struct usb_role_switch *sw;
+
+	sw = usb_role_switch_is_parent(fwnode);
+	if (!sw)
+		sw = fwnode_connection_find_match(fwnode, "usb-role-switch",
+						  NULL, usb_role_switch_match);
+	if (!IS_ERR_OR_NULL(sw))
+		WARN_ON(!try_module_get(sw->dev.parent->driver->owner));
+
+	return sw;
+}
+EXPORT_SYMBOL_GPL(fwnode_usb_role_switch_get);
+
+/**
  * usb_role_switch_put - Release handle to a switch
  * @sw: USB Role Switch
  *
diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c
index 7325a84dd1c8..409851306e99 100644
--- a/drivers/usb/roles/intel-xhci-usb-role-switch.c
+++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/property.h>
 #include <linux/usb/role.h>
 
 /* register definition */
@@ -26,6 +27,12 @@
 #define SW_VBUS_VALID			BIT(24)
 #define SW_IDPIN_EN			BIT(21)
 #define SW_IDPIN			BIT(20)
+#define SW_SWITCH_EN			BIT(16)
+
+#define DRD_CONFIG_DYNAMIC		0
+#define DRD_CONFIG_STATIC_HOST		1
+#define DRD_CONFIG_STATIC_DEVICE	2
+#define DRD_CONFIG_MASK			3
 
 #define DUAL_ROLE_CFG1			0x6c
 #define HOST_MODE			BIT(29)
@@ -37,6 +44,7 @@
 struct intel_xhci_usb_data {
 	struct usb_role_switch *role_sw;
 	void __iomem *base;
+	bool enable_sw_switch;
 };
 
 static const struct software_node intel_xhci_usb_node = {
@@ -49,6 +57,7 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role)
 	unsigned long timeout;
 	acpi_status status;
 	u32 glk, val;
+	u32 drd_config = DRD_CONFIG_DYNAMIC;
 
 	/*
 	 * On many CHT devices ACPI event (_AEI) handlers read / modify /
@@ -63,24 +72,35 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role)
 
 	pm_runtime_get_sync(dev);
 
-	/* Set idpin value as requested */
+	/*
+	 * Set idpin value as requested.
+	 * Since some devices rely on firmware setting DRD_CONFIG and
+	 * SW_SWITCH_EN bits to be zero for role switch,
+	 * do not set these bits for those devices.
+	 */
 	val = readl(data->base + DUAL_ROLE_CFG0);
 	switch (role) {
 	case USB_ROLE_NONE:
 		val |= SW_IDPIN;
 		val &= ~SW_VBUS_VALID;
+		drd_config = DRD_CONFIG_DYNAMIC;
 		break;
 	case USB_ROLE_HOST:
 		val &= ~SW_IDPIN;
 		val &= ~SW_VBUS_VALID;
+		drd_config = DRD_CONFIG_STATIC_HOST;
 		break;
 	case USB_ROLE_DEVICE:
 		val |= SW_IDPIN;
 		val |= SW_VBUS_VALID;
+		drd_config = DRD_CONFIG_STATIC_DEVICE;
 		break;
 	}
 	val |= SW_IDPIN_EN;
-
+	if (data->enable_sw_switch) {
+		val &= ~DRD_CONFIG_MASK;
+		val |= SW_SWITCH_EN | drd_config;
+	}
 	writel(val, data->base + DUAL_ROLE_CFG0);
 
 	acpi_release_global_lock(glk);
@@ -156,6 +176,9 @@ static int intel_xhci_usb_probe(struct platform_device *pdev)
 	sw_desc.allow_userspace_control = true,
 	sw_desc.fwnode = software_node_fwnode(&intel_xhci_usb_node);
 
+	data->enable_sw_switch = !device_property_read_bool(dev,
+						"sw_switch_disable");
+
 	data->role_sw = usb_role_switch_register(dev, &sw_desc);
 	if (IS_ERR(data->role_sw)) {
 		fwnode_handle_put(sw_desc.fwnode);
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 4b3a049561f3..f0688c44b04c 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -2023,6 +2023,46 @@ static int ftdi_read_eeprom(struct usb_serial *serial, void *dst, u16 addr,
 	return 0;
 }
 
+static int ftdi_gpio_init_ft232h(struct usb_serial_port *port)
+{
+	struct ftdi_private *priv = usb_get_serial_port_data(port);
+	u16 cbus_config;
+	u8 *buf;
+	int ret;
+	int i;
+
+	buf = kmalloc(4, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = ftdi_read_eeprom(port->serial, buf, 0x1a, 4);
+	if (ret < 0)
+		goto out_free;
+
+	/*
+	 * FT232H CBUS Memory Map
+	 *
+	 * 0x1a: X- (upper nibble -> AC5)
+	 * 0x1b: -X (lower nibble -> AC6)
+	 * 0x1c: XX (upper nibble -> AC9 | lower nibble -> AC8)
+	 */
+	cbus_config = buf[2] << 8 | (buf[1] & 0xf) << 4 | (buf[0] & 0xf0) >> 4;
+
+	priv->gc.ngpio = 4;
+	priv->gpio_altfunc = 0xff;
+
+	for (i = 0; i < priv->gc.ngpio; ++i) {
+		if ((cbus_config & 0xf) == FTDI_FTX_CBUS_MUX_GPIO)
+			priv->gpio_altfunc &= ~BIT(i);
+		cbus_config >>= 4;
+	}
+
+out_free:
+	kfree(buf);
+
+	return ret;
+}
+
 static int ftdi_gpio_init_ft232r(struct usb_serial_port *port)
 {
 	struct ftdi_private *priv = usb_get_serial_port_data(port);
@@ -2098,6 +2138,9 @@ static int ftdi_gpio_init(struct usb_serial_port *port)
 	int result;
 
 	switch (priv->chip_type) {
+	case FT232H:
+		result = ftdi_gpio_init_ft232h(port);
+		break;
 	case FT232RL:
 		result = ftdi_gpio_init_ft232r(port);
 		break;
diff --git a/drivers/usb/storage/debug.h b/drivers/usb/storage/debug.h
index 6d64f342f587..16ce06039a4d 100644
--- a/drivers/usb/storage/debug.h
+++ b/drivers/usb/storage/debug.h
@@ -29,8 +29,6 @@
 
 #include <linux/kernel.h>
 
-#define USB_STORAGE "usb-storage: "
-
 #ifdef CONFIG_USB_STORAGE_DEBUG
 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
 void usb_stor_show_sense(const struct us_data *us, unsigned char key,
diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
index 2b474d60b4db..28e1128d53a4 100644
--- a/drivers/usb/storage/isd200.c
+++ b/drivers/usb/storage/isd200.c
@@ -1511,7 +1511,7 @@ static int isd200_Initialization(struct us_data *us)
 
 static void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
 {
-	int sendToTransport = 1, orig_bufflen;
+	int sendToTransport, orig_bufflen;
 	union ata_cdb ataCdb;
 
 	/* Make sure driver was initialized */
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 05b80211290d..6737fab94959 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -40,6 +40,7 @@
 #include <scsi/scsi_eh.h>
 
 #include "usb.h"
+#include <linux/usb/hcd.h>
 #include "scsiglue.h"
 #include "debug.h"
 #include "transport.h"
@@ -141,11 +142,10 @@ static int slave_configure(struct scsi_device *sdev)
 
 	/*
 	 * Some USB host controllers can't do DMA; they have to use PIO.
-	 * They indicate this by setting their dma_mask to NULL.  For
-	 * such controllers we need to make sure the block layer sets
+	 * For such controllers we need to make sure the block layer sets
 	 * up bounce buffers in addressable memory.
 	 */
-	if (!us->pusb_dev->bus->controller->dma_mask)
+	if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)))
 		blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH);
 
 	/*
@@ -379,7 +379,7 @@ static int queuecommand_lck(struct scsi_cmnd *srb,
 
 	/* check for state-transition errors */
 	if (us->srb != NULL) {
-		printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n",
+		printk(KERN_ERR "usb-storage: Error in %s: us->srb = %p\n",
 			__func__, us->srb);
 		return SCSI_MLQUEUE_HOST_BUSY;
 	}
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
index 89d9193bd1cf..895e2418de53 100644
--- a/drivers/usb/typec/Kconfig
+++ b/drivers/usb/typec/Kconfig
@@ -53,6 +53,7 @@ source "drivers/usb/typec/ucsi/Kconfig"
 config TYPEC_TPS6598X
 	tristate "TI TPS6598x USB Power Delivery controller driver"
 	depends on I2C
+	select REGMAP_I2C
 	help
 	  Say Y or M here if your system has TI TPS65982 or TPS65983 USB Power
 	  Delivery controller.
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index 61b7bc58dd81..57907f26f681 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -215,7 +215,7 @@ static void *typec_mux_match(struct device_connection *con, int ep, void *data)
 	}
 
 	/* Alternate Mode muxes */
-	nval = fwnode_property_read_u16_array(con->fwnode, "svid", NULL, 0);
+	nval = fwnode_property_count_u16(con->fwnode, "svid");
 	if (nval <= 0)
 		return NULL;
 
diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c
index c524088246ee..ed8655c6af8c 100644
--- a/drivers/usb/typec/tcpm/fusb302.c
+++ b/drivers/usb/typec/tcpm/fusb302.c
@@ -26,6 +26,7 @@
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/types.h>
+#include <linux/usb.h>
 #include <linux/usb/typec.h>
 #include <linux/usb/tcpm.h>
 #include <linux/usb/pd.h>
@@ -75,7 +76,6 @@ struct fusb302_chip {
 	struct i2c_client *i2c_client;
 	struct tcpm_port *tcpm_port;
 	struct tcpc_dev tcpc_dev;
-	struct tcpc_config tcpc_config;
 
 	struct regulator *vbus;
 
@@ -207,23 +207,19 @@ static int fusb302_debug_show(struct seq_file *s, void *v)
 }
 DEFINE_SHOW_ATTRIBUTE(fusb302_debug);
 
-static struct dentry *rootdir;
-
 static void fusb302_debugfs_init(struct fusb302_chip *chip)
 {
-	mutex_init(&chip->logbuffer_lock);
-	if (!rootdir)
-		rootdir = debugfs_create_dir("fusb302", NULL);
+	char name[NAME_MAX];
 
-	chip->dentry = debugfs_create_file(dev_name(chip->dev),
-					   S_IFREG | 0444, rootdir,
+	mutex_init(&chip->logbuffer_lock);
+	snprintf(name, NAME_MAX, "fusb302-%s", dev_name(chip->dev));
+	chip->dentry = debugfs_create_file(name, S_IFREG | 0444, usb_debug_root,
 					   chip, &fusb302_debug_fops);
 }
 
 static void fusb302_debugfs_exit(struct fusb302_chip *chip)
 {
 	debugfs_remove(chip->dentry);
-	debugfs_remove(rootdir);
 }
 
 #else
@@ -1110,23 +1106,6 @@ done:
 	mutex_unlock(&chip->lock);
 }
 
-#define PDO_FIXED_FLAGS \
-	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
-
-static const u32 src_pdo[] = {
-	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
-};
-
-static const struct tcpc_config fusb302_tcpc_config = {
-	.src_pdo = src_pdo,
-	.nr_src_pdo = ARRAY_SIZE(src_pdo),
-	.operating_snk_mw = 2500,
-	.type = TYPEC_PORT_DRP,
-	.data = TYPEC_PORT_DRD,
-	.default_role = TYPEC_SINK,
-	.alt_modes = NULL,
-};
-
 static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
 {
 	fusb302_tcpc_dev->init = tcpm_init;
@@ -1670,27 +1649,36 @@ static int init_gpio(struct fusb302_chip *chip)
 	return 0;
 }
 
-static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip)
-{
-	struct device *dev = chip->dev;
-	u32 max_uv, max_ua;
+#define PDO_FIXED_FLAGS \
+	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
 
-	chip->snk_pdo[0] = PDO_FIXED(5000, 400, PDO_FIXED_FLAGS);
+static const u32 src_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS)
+};
 
-	/*
-	 * As max_snk_ma/mv/mw is not needed for tcpc_config,
-	 * those settings should be passed in via sink PDO, so
-	 * "fcs, max-sink-*" properties will be deprecated, to
-	 * perserve compatibility with existing users of them,
-	 * we read those properties to convert them to be a var
-	 * PDO.
-	 */
-	if (device_property_read_u32(dev, "fcs,max-sink-microvolt", &max_uv) ||
-		device_property_read_u32(dev, "fcs,max-sink-microamp", &max_ua))
-		return 1;
+static const u32 snk_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS)
+};
+
+static const struct property_entry port_props[] = {
+	PROPERTY_ENTRY_STRING("data-role", "dual"),
+	PROPERTY_ENTRY_STRING("power-role", "dual"),
+	PROPERTY_ENTRY_STRING("try-power-role", "sink"),
+	PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo),
+	PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo),
+	PROPERTY_ENTRY_U32("op-sink-microwatt", 2500),
+	{ }
+};
 
-	chip->snk_pdo[1] = PDO_VAR(5000, max_uv / 1000, max_ua / 1000);
-	return 2;
+static struct fwnode_handle *fusb302_fwnode_get(struct device *dev)
+{
+	struct fwnode_handle *fwnode;
+
+	fwnode = device_get_named_child_node(dev, "connector");
+	if (!fwnode)
+		fwnode = fwnode_create_software_node(port_props, NULL);
+
+	return fwnode;
 }
 
 static int fusb302_probe(struct i2c_client *client,
@@ -1701,7 +1689,6 @@ static int fusb302_probe(struct i2c_client *client,
 	struct device *dev = &client->dev;
 	const char *name;
 	int ret = 0;
-	u32 v;
 
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
 		dev_err(&client->dev,
@@ -1714,20 +1701,8 @@ static int fusb302_probe(struct i2c_client *client,
 
 	chip->i2c_client = client;
 	chip->dev = &client->dev;
-	chip->tcpc_config = fusb302_tcpc_config;
-	chip->tcpc_dev.config = &chip->tcpc_config;
 	mutex_init(&chip->lock);
 
-	chip->tcpc_dev.fwnode =
-		device_get_named_child_node(dev, "connector");
-
-	if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v))
-		chip->tcpc_config.operating_snk_mw = v / 1000;
-
-	/* Composite sink PDO */
-	chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip);
-	chip->tcpc_config.snk_pdo = chip->snk_pdo;
-
 	/*
 	 * Devicetree platforms should get extcon via phandle (not yet
 	 * supported). On ACPI platforms, we get the name from a device prop.
@@ -1753,6 +1728,7 @@ static int fusb302_probe(struct i2c_client *client,
 	INIT_WORK(&chip->irq_work, fusb302_irq_work);
 	INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work);
 	init_tcpc_dev(&chip->tcpc_dev);
+	fusb302_debugfs_init(chip);
 
 	if (client->irq) {
 		chip->gpio_int_n_irq = client->irq;
@@ -1762,8 +1738,15 @@ static int fusb302_probe(struct i2c_client *client,
 			goto destroy_workqueue;
 	}
 
+	chip->tcpc_dev.fwnode = fusb302_fwnode_get(dev);
+	if (IS_ERR(chip->tcpc_dev.fwnode)) {
+		ret = PTR_ERR(chip->tcpc_dev.fwnode);
+		goto destroy_workqueue;
+	}
+
 	chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev);
 	if (IS_ERR(chip->tcpm_port)) {
+		fwnode_handle_put(chip->tcpc_dev.fwnode);
 		ret = PTR_ERR(chip->tcpm_port);
 		if (ret != -EPROBE_DEFER)
 			dev_err(dev, "cannot register tcpm port, ret=%d", ret);
@@ -1778,14 +1761,15 @@ static int fusb302_probe(struct i2c_client *client,
 		goto tcpm_unregister_port;
 	}
 	enable_irq_wake(chip->gpio_int_n_irq);
-	fusb302_debugfs_init(chip);
 	i2c_set_clientdata(client, chip);
 
 	return ret;
 
 tcpm_unregister_port:
 	tcpm_unregister_port(chip->tcpm_port);
+	fwnode_handle_put(chip->tcpc_dev.fwnode);
 destroy_workqueue:
+	fusb302_debugfs_exit(chip);
 	destroy_workqueue(chip->wq);
 
 	return ret;
@@ -1800,6 +1784,7 @@ static int fusb302_remove(struct i2c_client *client)
 	cancel_work_sync(&chip->irq_work);
 	cancel_delayed_work_sync(&chip->bc_lvl_handler);
 	tcpm_unregister_port(chip->tcpm_port);
+	fwnode_handle_put(chip->tcpc_dev.fwnode);
 	destroy_workqueue(chip->wq);
 	fusb302_debugfs_exit(chip);
 
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index bcfdb55fd198..96562744101c 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -19,6 +19,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
+#include <linux/usb.h>
 #include <linux/usb/pd.h>
 #include <linux/usb/pd_ado.h>
 #include <linux/usb/pd_bdo.h>
@@ -571,17 +572,13 @@ static int tcpm_debug_show(struct seq_file *s, void *v)
 }
 DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
 
-static struct dentry *rootdir;
-
 static void tcpm_debugfs_init(struct tcpm_port *port)
 {
-	mutex_init(&port->logbuffer_lock);
-	/* /sys/kernel/debug/tcpm/usbcX */
-	if (!rootdir)
-		rootdir = debugfs_create_dir("tcpm", NULL);
+	char name[NAME_MAX];
 
-	port->dentry = debugfs_create_file(dev_name(port->dev),
-					   S_IFREG | 0444, rootdir,
+	mutex_init(&port->logbuffer_lock);
+	snprintf(name, NAME_MAX, "tcpm-%s", dev_name(port->dev));
+	port->dentry = debugfs_create_file(name, S_IFREG | 0444, usb_debug_root,
 					   port, &tcpm_debug_fops);
 }
 
@@ -597,10 +594,6 @@ static void tcpm_debugfs_exit(struct tcpm_port *port)
 	mutex_unlock(&port->logbuffer_lock);
 
 	debugfs_remove(port->dentry);
-	if (list_empty(&rootdir->d_subdirs)) {
-		debugfs_remove(rootdir);
-		rootdir = NULL;
-	}
 }
 
 #else
@@ -4434,8 +4427,7 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
 		goto sink;
 
 	/* Get source pdos */
-	ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
-					     NULL, 0);
+	ret = fwnode_property_count_u32(fwnode, "source-pdos");
 	if (ret <= 0)
 		return -EINVAL;
 
@@ -4459,8 +4451,7 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
 		return -EINVAL;
 sink:
 	/* Get sink pdos */
-	ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
-					     NULL, 0);
+	ret = fwnode_property_count_u32(fwnode, "sink-pdos");
 	if (ret <= 0)
 		return -EINVAL;
 
diff --git a/drivers/usb/typec/tcpm/wcove.c b/drivers/usb/typec/tcpm/wcove.c
index 6b317c150bdd..edc271da14f4 100644
--- a/drivers/usb/typec/tcpm/wcove.c
+++ b/drivers/usb/typec/tcpm/wcove.c
@@ -617,10 +617,8 @@ static int wcove_typec_probe(struct platform_device *pdev)
 	wcove->regmap = pmic->regmap;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+	if (irq < 0)
 		return irq;
-	}
 
 	irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr, irq);
 	if (irq < 0)
diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index 8e9f8fba55af..907e20e1a71e 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -1104,14 +1104,11 @@ static ssize_t do_flash_store(struct device *dev,
 
 static DEVICE_ATTR_WO(do_flash);
 
-static struct attribute *ucsi_ccg_sysfs_attrs[] = {
+static struct attribute *ucsi_ccg_attrs[] = {
 	&dev_attr_do_flash.attr,
 	NULL,
 };
-
-static struct attribute_group ucsi_ccg_attr_group = {
-	.attrs = ucsi_ccg_sysfs_attrs,
-};
+ATTRIBUTE_GROUPS(ucsi_ccg);
 
 static int ucsi_ccg_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
@@ -1189,10 +1186,6 @@ static int ucsi_ccg_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, uc);
 
-	status = sysfs_create_group(&uc->dev->kobj, &ucsi_ccg_attr_group);
-	if (status)
-		dev_err(uc->dev, "cannot create sysfs group: %d\n", status);
-
 	pm_runtime_set_active(uc->dev);
 	pm_runtime_enable(uc->dev);
 	pm_runtime_idle(uc->dev);
@@ -1209,7 +1202,6 @@ static int ucsi_ccg_remove(struct i2c_client *client)
 	ucsi_unregister_ppm(uc->ucsi);
 	pm_runtime_disable(uc->dev);
 	free_irq(uc->irq, uc);
-	sysfs_remove_group(&uc->dev->kobj, &ucsi_ccg_attr_group);
 
 	return 0;
 }
@@ -1270,6 +1262,7 @@ static struct i2c_driver ucsi_ccg_driver = {
 	.driver = {
 		.name = "ucsi_ccg",
 		.pm = &ucsi_ccg_pm,
+		.dev_groups = ucsi_ccg_groups,
 	},
 	.probe = ucsi_ccg_probe,
 	.remove = ucsi_ccg_remove,
diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index f101347e3ea3..c31d17d05810 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -35,9 +35,11 @@ MODULE_DEVICE_TABLE(usb, skel_table);
 
 /* our private defines. if this grows any larger, use your own .h file */
 #define MAX_TRANSFER		(PAGE_SIZE - 512)
-/* MAX_TRANSFER is chosen so that the VM is not stressed by
-   allocations > PAGE_SIZE and the number of packets in a page
-   is an integer 512 is the largest possible packet on EHCI */
+/*
+ * MAX_TRANSFER is chosen so that the VM is not stressed by
+ * allocations > PAGE_SIZE and the number of packets in a page
+ * is an integer 512 is the largest possible packet on EHCI
+ */
 #define WRITES_IN_FLIGHT	8
 /* arbitrarily chosen */
 
diff --git a/drivers/usb/usbip/stub.h b/drivers/usb/usbip/stub.h
index 35618ceb2791..d11270560c24 100644
--- a/drivers/usb/usbip/stub.h
+++ b/drivers/usb/usbip/stub.h
@@ -52,7 +52,11 @@ struct stub_priv {
 	unsigned long seqnum;
 	struct list_head list;
 	struct stub_device *sdev;
-	struct urb *urb;
+	struct urb **urbs;
+	struct scatterlist *sgl;
+	int num_urbs;
+	int completed_urbs;
+	int urb_status;
 
 	int unlinking;
 };
@@ -86,6 +90,7 @@ extern struct usb_device_driver stub_driver;
 struct bus_id_priv *get_busid_priv(const char *busid);
 void put_busid_priv(struct bus_id_priv *bid);
 int del_match_busid(char *busid);
+void stub_free_priv_and_urb(struct stub_priv *priv);
 void stub_device_cleanup_urbs(struct stub_device *sdev);
 
 /* stub_rx.c */
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index 7931e6cecc70..2305d425e6c9 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -106,38 +106,13 @@ err:
 }
 static DEVICE_ATTR_WO(usbip_sockfd);
 
-static int stub_add_files(struct device *dev)
-{
-	int err = 0;
-
-	err = device_create_file(dev, &dev_attr_usbip_status);
-	if (err)
-		goto err_status;
-
-	err = device_create_file(dev, &dev_attr_usbip_sockfd);
-	if (err)
-		goto err_sockfd;
-
-	err = device_create_file(dev, &dev_attr_usbip_debug);
-	if (err)
-		goto err_debug;
-
-	return 0;
-
-err_debug:
-	device_remove_file(dev, &dev_attr_usbip_sockfd);
-err_sockfd:
-	device_remove_file(dev, &dev_attr_usbip_status);
-err_status:
-	return err;
-}
-
-static void stub_remove_files(struct device *dev)
-{
-	device_remove_file(dev, &dev_attr_usbip_status);
-	device_remove_file(dev, &dev_attr_usbip_sockfd);
-	device_remove_file(dev, &dev_attr_usbip_debug);
-}
+static struct attribute *usbip_attrs[] = {
+	&dev_attr_usbip_status.attr,
+	&dev_attr_usbip_sockfd.attr,
+	&dev_attr_usbip_debug.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(usbip);
 
 static void stub_shutdown_connection(struct usbip_device *ud)
 {
@@ -379,17 +354,8 @@ static int stub_probe(struct usb_device *udev)
 		goto err_port;
 	}
 
-	rc = stub_add_files(&udev->dev);
-	if (rc) {
-		dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
-		goto err_files;
-	}
-
 	return 0;
 
-err_files:
-	usb_hub_release_port(udev->parent, udev->portnum,
-			     (struct usb_dev_state *) udev);
 err_port:
 	dev_set_drvdata(&udev->dev, NULL);
 	usb_put_dev(udev);
@@ -457,7 +423,6 @@ static void stub_disconnect(struct usb_device *udev)
 	/*
 	 * NOTE: rx/tx threads are invoked for each usb_device.
 	 */
-	stub_remove_files(&udev->dev);
 
 	/* release port */
 	rc = usb_hub_release_port(udev->parent, udev->portnum,
@@ -526,4 +491,5 @@ struct usb_device_driver stub_driver = {
 	.resume		= stub_resume,
 #endif
 	.supports_autosuspend	=	0,
+	.dev_groups	= usbip_groups,
 };
diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c
index 2e4bfccd4bfc..c1c0bbc9f8b1 100644
--- a/drivers/usb/usbip/stub_main.c
+++ b/drivers/usb/usbip/stub_main.c
@@ -6,6 +6,7 @@
 #include <linux/string.h>
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/scatterlist.h>
 
 #include "usbip_common.h"
 #include "stub.h"
@@ -281,13 +282,49 @@ static struct stub_priv *stub_priv_pop_from_listhead(struct list_head *listhead)
 	struct stub_priv *priv, *tmp;
 
 	list_for_each_entry_safe(priv, tmp, listhead, list) {
-		list_del(&priv->list);
+		list_del_init(&priv->list);
 		return priv;
 	}
 
 	return NULL;
 }
 
+void stub_free_priv_and_urb(struct stub_priv *priv)
+{
+	struct urb *urb;
+	int i;
+
+	for (i = 0; i < priv->num_urbs; i++) {
+		urb = priv->urbs[i];
+
+		if (!urb)
+			return;
+
+		kfree(urb->setup_packet);
+		urb->setup_packet = NULL;
+
+
+		if (urb->transfer_buffer && !priv->sgl) {
+			kfree(urb->transfer_buffer);
+			urb->transfer_buffer = NULL;
+		}
+
+		if (urb->num_sgs) {
+			sgl_free(urb->sg);
+			urb->sg = NULL;
+			urb->num_sgs = 0;
+		}
+
+		usb_free_urb(urb);
+	}
+	if (!list_empty(&priv->list))
+		list_del(&priv->list);
+	if (priv->sgl)
+		sgl_free(priv->sgl);
+	kfree(priv->urbs);
+	kmem_cache_free(stub_priv_cache, priv);
+}
+
 static struct stub_priv *stub_priv_pop(struct stub_device *sdev)
 {
 	unsigned long flags;
@@ -314,25 +351,15 @@ done:
 void stub_device_cleanup_urbs(struct stub_device *sdev)
 {
 	struct stub_priv *priv;
-	struct urb *urb;
+	int i;
 
 	dev_dbg(&sdev->udev->dev, "Stub device cleaning up urbs\n");
 
 	while ((priv = stub_priv_pop(sdev))) {
-		urb = priv->urb;
-		dev_dbg(&sdev->udev->dev, "free urb seqnum %lu\n",
-			priv->seqnum);
-		usb_kill_urb(urb);
-
-		kmem_cache_free(stub_priv_cache, priv);
+		for (i = 0; i < priv->num_urbs; i++)
+			usb_kill_urb(priv->urbs[i]);
 
-		kfree(urb->transfer_buffer);
-		urb->transfer_buffer = NULL;
-
-		kfree(urb->setup_packet);
-		urb->setup_packet = NULL;
-
-		usb_free_urb(urb);
+		stub_free_priv_and_urb(priv);
 	}
 }
 
diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
index b0a855acafa3..66edfeea68fe 100644
--- a/drivers/usb/usbip/stub_rx.c
+++ b/drivers/usb/usbip/stub_rx.c
@@ -7,6 +7,7 @@
 #include <linux/kthread.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
+#include <linux/scatterlist.h>
 
 #include "usbip_common.h"
 #include "stub.h"
@@ -201,7 +202,7 @@ static void tweak_special_requests(struct urb *urb)
 static int stub_recv_cmd_unlink(struct stub_device *sdev,
 				struct usbip_header *pdu)
 {
-	int ret;
+	int ret, i;
 	unsigned long flags;
 	struct stub_priv *priv;
 
@@ -246,12 +247,14 @@ static int stub_recv_cmd_unlink(struct stub_device *sdev,
 		 * so a driver in a client host will know the failure
 		 * of the unlink request ?
 		 */
-		ret = usb_unlink_urb(priv->urb);
-		if (ret != -EINPROGRESS)
-			dev_err(&priv->urb->dev->dev,
-				"failed to unlink a urb # %lu, ret %d\n",
-				priv->seqnum, ret);
-
+		for (i = priv->completed_urbs; i < priv->num_urbs; i++) {
+			ret = usb_unlink_urb(priv->urbs[i]);
+			if (ret != -EINPROGRESS)
+				dev_err(&priv->urbs[i]->dev->dev,
+					"failed to unlink %d/%d urb of seqnum %lu, ret %d\n",
+					i + 1, priv->num_urbs,
+					priv->seqnum, ret);
+		}
 		return 0;
 	}
 
@@ -433,14 +436,36 @@ static void masking_bogus_flags(struct urb *urb)
 	urb->transfer_flags &= allowed;
 }
 
+static int stub_recv_xbuff(struct usbip_device *ud, struct stub_priv *priv)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < priv->num_urbs; i++) {
+		ret = usbip_recv_xbuff(ud, priv->urbs[i]);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
 static void stub_recv_cmd_submit(struct stub_device *sdev,
 				 struct usbip_header *pdu)
 {
-	int ret;
 	struct stub_priv *priv;
 	struct usbip_device *ud = &sdev->ud;
 	struct usb_device *udev = sdev->udev;
+	struct scatterlist *sgl = NULL, *sg;
+	void *buffer = NULL;
+	unsigned long long buf_len;
+	int nents;
+	int num_urbs = 1;
 	int pipe = get_pipe(sdev, pdu);
+	int use_sg = pdu->u.cmd_submit.transfer_flags & URB_DMA_MAP_SG;
+	int support_sg = 1;
+	int np = 0;
+	int ret, i;
 
 	if (pipe == -1)
 		return;
@@ -449,76 +474,139 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
 	if (!priv)
 		return;
 
-	/* setup a urb */
-	if (usb_pipeisoc(pipe))
-		priv->urb = usb_alloc_urb(pdu->u.cmd_submit.number_of_packets,
-					  GFP_KERNEL);
-	else
-		priv->urb = usb_alloc_urb(0, GFP_KERNEL);
+	buf_len = (unsigned long long)pdu->u.cmd_submit.transfer_buffer_length;
 
-	if (!priv->urb) {
-		usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
-		return;
+	/* allocate urb transfer buffer, if needed */
+	if (buf_len) {
+		if (use_sg) {
+			sgl = sgl_alloc(buf_len, GFP_KERNEL, &nents);
+			if (!sgl)
+				goto err_malloc;
+		} else {
+			buffer = kzalloc(buf_len, GFP_KERNEL);
+			if (!buffer)
+				goto err_malloc;
+		}
 	}
 
-	/* allocate urb transfer buffer, if needed */
-	if (pdu->u.cmd_submit.transfer_buffer_length > 0) {
-		priv->urb->transfer_buffer =
-			kzalloc(pdu->u.cmd_submit.transfer_buffer_length,
-				GFP_KERNEL);
-		if (!priv->urb->transfer_buffer) {
+	/* Check if the server's HCD supports SG */
+	if (use_sg && !udev->bus->sg_tablesize) {
+		/*
+		 * If the server's HCD doesn't support SG, break a single SG
+		 * request into several URBs and map each SG list entry to
+		 * corresponding URB buffer. The previously allocated SG
+		 * list is stored in priv->sgl (If the server's HCD support SG,
+		 * SG list is stored only in urb->sg) and it is used as an
+		 * indicator that the server split single SG request into
+		 * several URBs. Later, priv->sgl is used by stub_complete() and
+		 * stub_send_ret_submit() to reassemble the divied URBs.
+		 */
+		support_sg = 0;
+		num_urbs = nents;
+		priv->completed_urbs = 0;
+		pdu->u.cmd_submit.transfer_flags &= ~URB_DMA_MAP_SG;
+	}
+
+	/* allocate urb array */
+	priv->num_urbs = num_urbs;
+	priv->urbs = kmalloc_array(num_urbs, sizeof(*priv->urbs), GFP_KERNEL);
+	if (!priv->urbs)
+		goto err_urbs;
+
+	/* setup a urb */
+	if (support_sg) {
+		if (usb_pipeisoc(pipe))
+			np = pdu->u.cmd_submit.number_of_packets;
+
+		priv->urbs[0] = usb_alloc_urb(np, GFP_KERNEL);
+		if (!priv->urbs[0])
+			goto err_urb;
+
+		if (buf_len) {
+			if (use_sg) {
+				priv->urbs[0]->sg = sgl;
+				priv->urbs[0]->num_sgs = nents;
+				priv->urbs[0]->transfer_buffer = NULL;
+			} else {
+				priv->urbs[0]->transfer_buffer = buffer;
+			}
+		}
+
+		/* copy urb setup packet */
+		priv->urbs[0]->setup_packet = kmemdup(&pdu->u.cmd_submit.setup,
+					8, GFP_KERNEL);
+		if (!priv->urbs[0]->setup_packet) {
 			usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
 			return;
 		}
-	}
 
-	/* copy urb setup packet */
-	priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
-					  GFP_KERNEL);
-	if (!priv->urb->setup_packet) {
-		dev_err(&udev->dev, "allocate setup_packet\n");
-		usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
-		return;
+		usbip_pack_pdu(pdu, priv->urbs[0], USBIP_CMD_SUBMIT, 0);
+	} else {
+		for_each_sg(sgl, sg, nents, i) {
+			priv->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
+			/* The URBs which is previously allocated will be freed
+			 * in stub_device_cleanup_urbs() if error occurs.
+			 */
+			if (!priv->urbs[i])
+				goto err_urb;
+
+			usbip_pack_pdu(pdu, priv->urbs[i], USBIP_CMD_SUBMIT, 0);
+			priv->urbs[i]->transfer_buffer = sg_virt(sg);
+			priv->urbs[i]->transfer_buffer_length = sg->length;
+		}
+		priv->sgl = sgl;
 	}
 
-	/* set other members from the base header of pdu */
-	priv->urb->context                = (void *) priv;
-	priv->urb->dev                    = udev;
-	priv->urb->pipe                   = pipe;
-	priv->urb->complete               = stub_complete;
+	for (i = 0; i < num_urbs; i++) {
+		/* set other members from the base header of pdu */
+		priv->urbs[i]->context = (void *) priv;
+		priv->urbs[i]->dev = udev;
+		priv->urbs[i]->pipe = pipe;
+		priv->urbs[i]->complete = stub_complete;
 
-	usbip_pack_pdu(pdu, priv->urb, USBIP_CMD_SUBMIT, 0);
+		/* no need to submit an intercepted request, but harmless? */
+		tweak_special_requests(priv->urbs[i]);
 
+		masking_bogus_flags(priv->urbs[i]);
+	}
 
-	if (usbip_recv_xbuff(ud, priv->urb) < 0)
+	if (stub_recv_xbuff(ud, priv) < 0)
 		return;
 
-	if (usbip_recv_iso(ud, priv->urb) < 0)
+	if (usbip_recv_iso(ud, priv->urbs[0]) < 0)
 		return;
 
-	/* no need to submit an intercepted request, but harmless? */
-	tweak_special_requests(priv->urb);
-
-	masking_bogus_flags(priv->urb);
 	/* urb is now ready to submit */
-	ret = usb_submit_urb(priv->urb, GFP_KERNEL);
-
-	if (ret == 0)
-		usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
-				  pdu->base.seqnum);
-	else {
-		dev_err(&udev->dev, "submit_urb error, %d\n", ret);
-		usbip_dump_header(pdu);
-		usbip_dump_urb(priv->urb);
-
-		/*
-		 * Pessimistic.
-		 * This connection will be discarded.
-		 */
-		usbip_event_add(ud, SDEV_EVENT_ERROR_SUBMIT);
+	for (i = 0; i < priv->num_urbs; i++) {
+		ret = usb_submit_urb(priv->urbs[i], GFP_KERNEL);
+
+		if (ret == 0)
+			usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
+					pdu->base.seqnum);
+		else {
+			dev_err(&udev->dev, "submit_urb error, %d\n", ret);
+			usbip_dump_header(pdu);
+			usbip_dump_urb(priv->urbs[i]);
+
+			/*
+			 * Pessimistic.
+			 * This connection will be discarded.
+			 */
+			usbip_event_add(ud, SDEV_EVENT_ERROR_SUBMIT);
+			break;
+		}
 	}
 
 	usbip_dbg_stub_rx("Leave\n");
+	return;
+
+err_urb:
+	kfree(priv->urbs);
+err_urbs:
+	kfree(buffer);
+	sgl_free(sgl);
+err_malloc:
+	usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
 }
 
 /* recv a pdu */
diff --git a/drivers/usb/usbip/stub_tx.c b/drivers/usb/usbip/stub_tx.c
index f0ec41a50cbc..36010a82b359 100644
--- a/drivers/usb/usbip/stub_tx.c
+++ b/drivers/usb/usbip/stub_tx.c
@@ -5,25 +5,11 @@
 
 #include <linux/kthread.h>
 #include <linux/socket.h>
+#include <linux/scatterlist.h>
 
 #include "usbip_common.h"
 #include "stub.h"
 
-static void stub_free_priv_and_urb(struct stub_priv *priv)
-{
-	struct urb *urb = priv->urb;
-
-	kfree(urb->setup_packet);
-	urb->setup_packet = NULL;
-
-	kfree(urb->transfer_buffer);
-	urb->transfer_buffer = NULL;
-
-	list_del(&priv->list);
-	kmem_cache_free(stub_priv_cache, priv);
-	usb_free_urb(urb);
-}
-
 /* be in spin_lock_irqsave(&sdev->priv_lock, flags) */
 void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
 			     __u32 status)
@@ -85,6 +71,22 @@ void stub_complete(struct urb *urb)
 		break;
 	}
 
+	/*
+	 * If the server breaks single SG request into the several URBs, the
+	 * URBs must be reassembled before sending completed URB to the vhci.
+	 * Don't wake up the tx thread until all the URBs are completed.
+	 */
+	if (priv->sgl) {
+		priv->completed_urbs++;
+
+		/* Only save the first error status */
+		if (urb->status && !priv->urb_status)
+			priv->urb_status = urb->status;
+
+		if (priv->completed_urbs < priv->num_urbs)
+			return;
+	}
+
 	/* link a urb to the queue of tx. */
 	spin_lock_irqsave(&sdev->priv_lock, flags);
 	if (sdev->ud.tcp_socket == NULL) {
@@ -156,18 +158,22 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 	size_t total_size = 0;
 
 	while ((priv = dequeue_from_priv_tx(sdev)) != NULL) {
-		int ret;
-		struct urb *urb = priv->urb;
+		struct urb *urb = priv->urbs[0];
 		struct usbip_header pdu_header;
 		struct usbip_iso_packet_descriptor *iso_buffer = NULL;
 		struct kvec *iov = NULL;
+		struct scatterlist *sg;
+		u32 actual_length = 0;
 		int iovnum = 0;
+		int ret;
+		int i;
 
 		txsize = 0;
 		memset(&pdu_header, 0, sizeof(pdu_header));
 		memset(&msg, 0, sizeof(msg));
 
-		if (urb->actual_length > 0 && !urb->transfer_buffer) {
+		if (urb->actual_length > 0 && !urb->transfer_buffer &&
+		   !urb->num_sgs) {
 			dev_err(&sdev->udev->dev,
 				"urb: actual_length %d transfer_buffer null\n",
 				urb->actual_length);
@@ -176,6 +182,11 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 
 		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
 			iovnum = 2 + urb->number_of_packets;
+		else if (usb_pipein(urb->pipe) && urb->actual_length > 0 &&
+			urb->num_sgs)
+			iovnum = 1 + urb->num_sgs;
+		else if (usb_pipein(urb->pipe) && priv->sgl)
+			iovnum = 1 + priv->num_urbs;
 		else
 			iovnum = 2;
 
@@ -192,6 +203,15 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 		setup_ret_submit_pdu(&pdu_header, urb);
 		usbip_dbg_stub_tx("setup txdata seqnum: %d\n",
 				  pdu_header.base.seqnum);
+
+		if (priv->sgl) {
+			for (i = 0; i < priv->num_urbs; i++)
+				actual_length += priv->urbs[i]->actual_length;
+
+			pdu_header.u.ret_submit.status = priv->urb_status;
+			pdu_header.u.ret_submit.actual_length = actual_length;
+		}
+
 		usbip_header_correct_endian(&pdu_header, 1);
 
 		iov[iovnum].iov_base = &pdu_header;
@@ -200,12 +220,47 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 		txsize += sizeof(pdu_header);
 
 		/* 2. setup transfer buffer */
-		if (usb_pipein(urb->pipe) &&
+		if (usb_pipein(urb->pipe) && priv->sgl) {
+			/* If the server split a single SG request into several
+			 * URBs because the server's HCD doesn't support SG,
+			 * reassemble the split URB buffers into a single
+			 * return command.
+			 */
+			for (i = 0; i < priv->num_urbs; i++) {
+				iov[iovnum].iov_base =
+					priv->urbs[i]->transfer_buffer;
+				iov[iovnum].iov_len =
+					priv->urbs[i]->actual_length;
+				iovnum++;
+			}
+			txsize += actual_length;
+		} else if (usb_pipein(urb->pipe) &&
 		    usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS &&
 		    urb->actual_length > 0) {
-			iov[iovnum].iov_base = urb->transfer_buffer;
-			iov[iovnum].iov_len  = urb->actual_length;
-			iovnum++;
+			if (urb->num_sgs) {
+				unsigned int copy = urb->actual_length;
+				int size;
+
+				for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+					if (copy == 0)
+						break;
+
+					if (copy < sg->length)
+						size = copy;
+					else
+						size = sg->length;
+
+					iov[iovnum].iov_base = sg_virt(sg);
+					iov[iovnum].iov_len = size;
+
+					iovnum++;
+					copy -= size;
+				}
+			} else {
+				iov[iovnum].iov_base = urb->transfer_buffer;
+				iov[iovnum].iov_len  = urb->actual_length;
+				iovnum++;
+			}
 			txsize += urb->actual_length;
 		} else if (usb_pipein(urb->pipe) &&
 			   usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
diff --git a/drivers/usb/usbip/usbip_common.c b/drivers/usb/usbip/usbip_common.c
index 45da3e01c7b0..6532d68e8808 100644
--- a/drivers/usb/usbip/usbip_common.c
+++ b/drivers/usb/usbip/usbip_common.c
@@ -680,8 +680,12 @@ EXPORT_SYMBOL_GPL(usbip_pad_iso);
 /* some members of urb must be substituted before. */
 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
 {
-	int ret;
+	struct scatterlist *sg;
+	int ret = 0;
+	int recv;
 	int size;
+	int copy;
+	int i;
 
 	if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
 		/* the direction of urb must be OUT. */
@@ -701,29 +705,48 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
 	if (!(size > 0))
 		return 0;
 
-	if (size > urb->transfer_buffer_length) {
+	if (size > urb->transfer_buffer_length)
 		/* should not happen, probably malicious packet */
-		if (ud->side == USBIP_STUB) {
-			usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
-			return 0;
-		} else {
-			usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
-			return -EPIPE;
-		}
-	}
+		goto error;
 
-	ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
-	if (ret != size) {
-		dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
-		if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
-			usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
-		} else {
-			usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
-			return -EPIPE;
+	if (urb->num_sgs) {
+		copy = size;
+		for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+			int recv_size;
+
+			if (copy < sg->length)
+				recv_size = copy;
+			else
+				recv_size = sg->length;
+
+			recv = usbip_recv(ud->tcp_socket, sg_virt(sg),
+						recv_size);
+
+			if (recv != recv_size)
+				goto error;
+
+			copy -= recv;
+			ret += recv;
 		}
+
+		if (ret != size)
+			goto error;
+	} else {
+		ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
+		if (ret != size)
+			goto error;
 	}
 
 	return ret;
+
+error:
+	dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
+	if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC)
+		usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+	else
+		usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+
+	return -EPIPE;
 }
 EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
 
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 000ab7225717..585a84d319bd 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -697,7 +697,8 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
 	}
 	vdev = &vhci_hcd->vdev[portnum-1];
 
-	if (!urb->transfer_buffer && urb->transfer_buffer_length) {
+	if (!urb->transfer_buffer && !urb->num_sgs &&
+	     urb->transfer_buffer_length) {
 		dev_dbg(dev, "Null URB transfer buffer\n");
 		return -EINVAL;
 	}
@@ -1143,6 +1144,15 @@ static int vhci_setup(struct usb_hcd *hcd)
 		hcd->speed = HCD_USB3;
 		hcd->self.root_hub->speed = USB_SPEED_SUPER;
 	}
+
+	/*
+	 * Support SG.
+	 * sg_tablesize is an arbitrary value to alleviate memory pressure
+	 * on the host.
+	 */
+	hcd->self.sg_tablesize = 32;
+	hcd->self.no_sg_constraint = 1;
+
 	return 0;
 }
 
diff --git a/drivers/usb/usbip/vhci_rx.c b/drivers/usb/usbip/vhci_rx.c
index 44cd64518925..33f8972ba842 100644
--- a/drivers/usb/usbip/vhci_rx.c
+++ b/drivers/usb/usbip/vhci_rx.c
@@ -90,6 +90,9 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
 	if (usbip_dbg_flag_vhci_rx)
 		usbip_dump_urb(urb);
 
+	if (urb->num_sgs)
+		urb->transfer_flags &= ~URB_DMA_MAP_SG;
+
 	usbip_dbg_vhci_rx("now giveback urb %u\n", pdu->base.seqnum);
 
 	spin_lock_irqsave(&vhci->lock, flags);
diff --git a/drivers/usb/usbip/vhci_tx.c b/drivers/usb/usbip/vhci_tx.c
index 2fa26d0578d7..c3803785f6ef 100644
--- a/drivers/usb/usbip/vhci_tx.c
+++ b/drivers/usb/usbip/vhci_tx.c
@@ -5,6 +5,7 @@
 
 #include <linux/kthread.h>
 #include <linux/slab.h>
+#include <linux/scatterlist.h>
 
 #include "usbip_common.h"
 #include "vhci.h"
@@ -50,19 +51,23 @@ static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
 
 static int vhci_send_cmd_submit(struct vhci_device *vdev)
 {
+	struct usbip_iso_packet_descriptor *iso_buffer = NULL;
 	struct vhci_priv *priv = NULL;
+	struct scatterlist *sg;
 
 	struct msghdr msg;
-	struct kvec iov[3];
+	struct kvec *iov;
 	size_t txsize;
 
 	size_t total_size = 0;
+	int iovnum;
+	int err = -ENOMEM;
+	int i;
 
 	while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
 		int ret;
 		struct urb *urb = priv->urb;
 		struct usbip_header pdu_header;
-		struct usbip_iso_packet_descriptor *iso_buffer = NULL;
 
 		txsize = 0;
 		memset(&pdu_header, 0, sizeof(pdu_header));
@@ -72,18 +77,45 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)
 		usbip_dbg_vhci_tx("setup txdata urb seqnum %lu\n",
 				  priv->seqnum);
 
+		if (urb->num_sgs && usb_pipeout(urb->pipe))
+			iovnum = 2 + urb->num_sgs;
+		else
+			iovnum = 3;
+
+		iov = kcalloc(iovnum, sizeof(*iov), GFP_KERNEL);
+		if (!iov) {
+			usbip_event_add(&vdev->ud, SDEV_EVENT_ERROR_MALLOC);
+			return -ENOMEM;
+		}
+
+		if (urb->num_sgs)
+			urb->transfer_flags |= URB_DMA_MAP_SG;
+
 		/* 1. setup usbip_header */
 		setup_cmd_submit_pdu(&pdu_header, urb);
 		usbip_header_correct_endian(&pdu_header, 1);
+		iovnum = 0;
 
-		iov[0].iov_base = &pdu_header;
-		iov[0].iov_len  = sizeof(pdu_header);
+		iov[iovnum].iov_base = &pdu_header;
+		iov[iovnum].iov_len  = sizeof(pdu_header);
 		txsize += sizeof(pdu_header);
+		iovnum++;
 
 		/* 2. setup transfer buffer */
 		if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
-			iov[1].iov_base = urb->transfer_buffer;
-			iov[1].iov_len  = urb->transfer_buffer_length;
+			if (urb->num_sgs &&
+				      !usb_endpoint_xfer_isoc(&urb->ep->desc)) {
+				for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+					iov[iovnum].iov_base = sg_virt(sg);
+					iov[iovnum].iov_len = sg->length;
+					iovnum++;
+				}
+			} else {
+				iov[iovnum].iov_base = urb->transfer_buffer;
+				iov[iovnum].iov_len  =
+						urb->transfer_buffer_length;
+				iovnum++;
+			}
 			txsize += urb->transfer_buffer_length;
 		}
 
@@ -95,23 +127,26 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)
 			if (!iso_buffer) {
 				usbip_event_add(&vdev->ud,
 						SDEV_EVENT_ERROR_MALLOC);
-				return -1;
+				goto err_iso_buffer;
 			}
 
-			iov[2].iov_base = iso_buffer;
-			iov[2].iov_len  = len;
+			iov[iovnum].iov_base = iso_buffer;
+			iov[iovnum].iov_len  = len;
+			iovnum++;
 			txsize += len;
 		}
 
-		ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
+		ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, iovnum,
+				     txsize);
 		if (ret != txsize) {
 			pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
 			       txsize);
-			kfree(iso_buffer);
 			usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
-			return -1;
+			err = -EPIPE;
+			goto err_tx;
 		}
 
+		kfree(iov);
 		kfree(iso_buffer);
 		usbip_dbg_vhci_tx("send txdata\n");
 
@@ -119,6 +154,13 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)
 	}
 
 	return total_size;
+
+err_tx:
+	kfree(iso_buffer);
+err_iso_buffer:
+	kfree(iov);
+
+	return err;
 }
 
 static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
diff --git a/drivers/usb/usbip/vudc.h b/drivers/usb/usbip/vudc.h
index cf968192e59f..1bd4bc005829 100644
--- a/drivers/usb/usbip/vudc.h
+++ b/drivers/usb/usbip/vudc.h
@@ -115,7 +115,7 @@ struct vudc_device {
 	struct list_head dev_entry;
 };
 
-extern const struct attribute_group vudc_attr_group;
+extern const struct attribute_group *vudc_groups[];
 
 /* visible everywhere */
 
diff --git a/drivers/usb/usbip/vudc_dev.c b/drivers/usb/usbip/vudc_dev.c
index a72c17ff1c6a..c8eeabdd9b56 100644
--- a/drivers/usb/usbip/vudc_dev.c
+++ b/drivers/usb/usbip/vudc_dev.c
@@ -616,18 +616,10 @@ int vudc_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto err_add_udc;
 
-	ret = sysfs_create_group(&pdev->dev.kobj, &vudc_attr_group);
-	if (ret) {
-		dev_err(&udc->pdev->dev, "create sysfs files\n");
-		goto err_sysfs;
-	}
-
 	platform_set_drvdata(pdev, udc);
 
 	return ret;
 
-err_sysfs:
-	usb_del_gadget_udc(&udc->gadget);
 err_add_udc:
 	cleanup_vudc_hw(udc);
 err_init_vudc_hw:
@@ -640,7 +632,6 @@ int vudc_remove(struct platform_device *pdev)
 {
 	struct vudc *udc = platform_get_drvdata(pdev);
 
-	sysfs_remove_group(&pdev->dev.kobj, &vudc_attr_group);
 	usb_del_gadget_udc(&udc->gadget);
 	cleanup_vudc_hw(udc);
 	kfree(udc);
diff --git a/drivers/usb/usbip/vudc_main.c b/drivers/usb/usbip/vudc_main.c
index 390733e6937e..678faa82598c 100644
--- a/drivers/usb/usbip/vudc_main.c
+++ b/drivers/usb/usbip/vudc_main.c
@@ -22,6 +22,7 @@ static struct platform_driver vudc_driver = {
 	.remove		= vudc_remove,
 	.driver		= {
 		.name	= GADGET_NAME,
+		.dev_groups = vudc_groups,
 	},
 };
 
diff --git a/drivers/usb/usbip/vudc_sysfs.c b/drivers/usb/usbip/vudc_sysfs.c
index 6dcd3ff655c3..100f680c572a 100644
--- a/drivers/usb/usbip/vudc_sysfs.c
+++ b/drivers/usb/usbip/vudc_sysfs.c
@@ -215,7 +215,12 @@ static struct bin_attribute *dev_bin_attrs[] = {
 	NULL,
 };
 
-const struct attribute_group vudc_attr_group = {
+static const struct attribute_group vudc_attr_group = {
 	.attrs = dev_attrs,
 	.bin_attrs = dev_bin_attrs,
 };
+
+const struct attribute_group *vudc_groups[] = {
+	&vudc_attr_group,
+	NULL,
+};
diff --git a/drivers/usb/wusbcore/Kconfig b/drivers/usb/wusbcore/Kconfig
deleted file mode 100644
index abc0f361021f..000000000000
--- a/drivers/usb/wusbcore/Kconfig
+++ /dev/null
@@ -1,38 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Wireless USB Core configuration
-#
-config USB_WUSB
-	tristate "Enable Wireless USB extensions"
-	depends on UWB
-	select CRYPTO
-	select CRYPTO_AES
-	select CRYPTO_CCM
-	help
-	  Enable the host-side support for Wireless USB.
-
-          To compile this support select Y (built in). It is safe to
-	  select even if you don't have the hardware.
-
-config USB_WUSB_CBAF
-	tristate "Support WUSB Cable Based Association (CBA)"
-	depends on USB
-	help
-	  Some WUSB devices support Cable Based Association. It's used to
-	  enable the secure communication between the host and the
-	  device.
-
-	  Enable this option if your WUSB device must to be connected
-	  via wired USB before establishing a wireless link.
-
-	  It is safe to select even if you don't have a compatible
-	  hardware.
-
-config USB_WUSB_CBAF_DEBUG
-	bool "Enable CBA debug messages"
-	depends on USB_WUSB_CBAF
-	help
-	  Say Y here if you want the CBA to produce a bunch of debug messages
-	  to the system log. Select this if you are having a problem with
-	  CBA support and want to see more of what is going on.
-
diff --git a/drivers/usb/wusbcore/Makefile b/drivers/usb/wusbcore/Makefile
deleted file mode 100644
index d604ccdd916f..000000000000
--- a/drivers/usb/wusbcore/Makefile
+++ /dev/null
@@ -1,26 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_USB_WUSB_CBAF_DEBUG) := -DDEBUG
-
-obj-$(CONFIG_USB_WUSB)		+= wusbcore.o
-obj-$(CONFIG_USB_HWA_HCD)	+= wusb-wa.o
-obj-$(CONFIG_USB_WUSB_CBAF)	+= wusb-cbaf.o
-
-
-wusbcore-y :=		\
-	crypto.o	\
-	devconnect.o	\
-	dev-sysfs.o	\
-	mmc.o		\
-	pal.o		\
-	rh.o		\
-	reservation.o	\
-	security.o	\
-	wusbhc.o
-
-wusb-cbaf-y := cbaf.o
-
-wusb-wa-y :=		\
-	wa-hc.o		\
-	wa-nep.o	\
-	wa-rpipe.o	\
-	wa-xfer.o
diff --git a/drivers/usb/wusbcore/cbaf.c b/drivers/usb/wusbcore/cbaf.c
deleted file mode 100644
index af77064c7456..000000000000
--- a/drivers/usb/wusbcore/cbaf.c
+++ /dev/null
@@ -1,645 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB - Cable Based Association
- *
- *
- * Copyright (C) 2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
- *
- * WUSB devices have to be paired (associated in WUSB lingo) so
- * that they can connect to the system.
- *
- * One way of pairing is using CBA-Cable Based Association. First
- * time you plug the device with a cable, association is done between
- * host and device and subsequent times, you can connect wirelessly
- * without having to associate again. That's the idea.
- *
- * This driver does nothing Earth shattering. It just provides an
- * interface to chat with the wire-connected device so we can get a
- * CDID (device ID) that might have been previously associated to a
- * CHID (host ID) and to set up a new <CHID,CDID,CK> triplet
- * (connection context), with the CK being the secret, or connection
- * key. This is the pairing data.
- *
- * When a device with the CBA capability connects, the probe routine
- * just creates a bunch of sysfs files that a user space enumeration
- * manager uses to allow it to connect wirelessly to the system or not.
- *
- * The process goes like this:
- *
- * 1. Device plugs, cbaf is loaded, notifications happen.
- *
- * 2. The connection manager (CM) sees a device with CBAF capability
- *    (the wusb_chid etc. files in /sys/devices/blah/OURDEVICE).
- *
- * 3. The CM writes the host name, supported band groups, and the CHID
- *    (host ID) into the wusb_host_name, wusb_host_band_groups and
- *    wusb_chid files. These get sent to the device and the CDID (if
- *    any) for this host is requested.
- *
- * 4. The CM can verify that the device's supported band groups
- *    (wusb_device_band_groups) are compatible with the host.
- *
- * 5. The CM reads the wusb_cdid file.
- *
- * 6. The CM looks up its database
- *
- * 6.1 If it has a matching CHID,CDID entry, the device has been
- *     authorized before (paired) and nothing further needs to be
- *     done.
- *
- * 6.2 If the CDID is zero (or the CM doesn't find a matching CDID in
- *     its database), the device is assumed to be not known.  The CM
- *     may associate the host with device by: writing a randomly
- *     generated CDID to wusb_cdid and then a random CK to wusb_ck
- *     (this uploads the new CC to the device).
- *
- *     CMD may choose to prompt the user before associating with a new
- *     device.
- *
- * 7. Device is unplugged.
- *
- * When the device tries to connect wirelessly, it will present its
- * CDID to the WUSB host controller.  The CM will query the
- * database. If the CHID/CDID pair found, it will (with a 4-way
- * handshake) challenge the device to demonstrate it has the CK secret
- * key (from our database) without actually exchanging it. Once
- * satisfied, crypto keys are derived from the CK, the device is
- * connected and all communication is encrypted.
- *
- * References:
- *   [WUSB-AM] Association Models Supplement to the Certified Wireless
- *             Universal Serial Bus Specification, version 1.0.
- */
-#include <linux/module.h>
-#include <linux/ctype.h>
-#include <linux/usb.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/uwb.h>
-#include <linux/usb/wusb.h>
-#include <linux/usb/association.h>
-
-#define CBA_NAME_LEN 0x40 /* [WUSB-AM] table 4-7 */
-
-/* An instance of a Cable-Based-Association-Framework device */
-struct cbaf {
-	struct usb_device *usb_dev;
-	struct usb_interface *usb_iface;
-	void *buffer;
-	size_t buffer_size;
-
-	struct wusb_ckhdid chid;
-	char host_name[CBA_NAME_LEN];
-	u16 host_band_groups;
-
-	struct wusb_ckhdid cdid;
-	char device_name[CBA_NAME_LEN];
-	u16 device_band_groups;
-
-	struct wusb_ckhdid ck;
-};
-
-/*
- * Verify that a CBAF USB-interface has what we need
- *
- * According to [WUSB-AM], CBA devices should provide at least two
- * interfaces:
- *  - RETRIEVE_HOST_INFO
- *  - ASSOCIATE
- *
- * If the device doesn't provide these interfaces, we do not know how
- * to deal with it.
- */
-static int cbaf_check(struct cbaf *cbaf)
-{
-	int result;
-	struct device *dev = &cbaf->usb_iface->dev;
-	struct wusb_cbaf_assoc_info *assoc_info;
-	struct wusb_cbaf_assoc_request *assoc_request;
-	size_t assoc_size;
-	void *itr, *top;
-	int ar_rhi = 0, ar_assoc = 0;
-
-	result = usb_control_msg(
-		cbaf->usb_dev, usb_rcvctrlpipe(cbaf->usb_dev, 0),
-		CBAF_REQ_GET_ASSOCIATION_INFORMATION,
-		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		0, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-		cbaf->buffer, cbaf->buffer_size, USB_CTRL_GET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Cannot get available association types: %d\n",
-			result);
-		return result;
-	}
-
-	assoc_info = cbaf->buffer;
-	if (result < sizeof(*assoc_info)) {
-		dev_err(dev, "Not enough data to decode association info "
-			"header (%zu vs %zu bytes required)\n",
-			(size_t)result, sizeof(*assoc_info));
-		return result;
-	}
-
-	assoc_size = le16_to_cpu(assoc_info->Length);
-	if (result < assoc_size) {
-		dev_err(dev, "Not enough data to decode association info "
-			"(%zu vs %zu bytes required)\n",
-			(size_t)assoc_size, sizeof(*assoc_info));
-		return result;
-	}
-	/*
-	 * From now on, we just verify, but won't error out unless we
-	 * don't find the AR_TYPE_WUSB_{RETRIEVE_HOST_INFO,ASSOCIATE}
-	 * types.
-	 */
-	itr = cbaf->buffer + sizeof(*assoc_info);
-	top = cbaf->buffer + assoc_size;
-	dev_dbg(dev, "Found %u association requests (%zu bytes)\n",
-		 assoc_info->NumAssociationRequests, assoc_size);
-
-	while (itr < top) {
-		u16 ar_type, ar_subtype;
-		u32 ar_size;
-		const char *ar_name;
-
-		assoc_request = itr;
-
-		if (top - itr < sizeof(*assoc_request)) {
-			dev_err(dev, "Not enough data to decode association "
-				"request (%zu vs %zu bytes needed)\n",
-				top - itr, sizeof(*assoc_request));
-			break;
-		}
-
-		ar_type = le16_to_cpu(assoc_request->AssociationTypeId);
-		ar_subtype = le16_to_cpu(assoc_request->AssociationSubTypeId);
-		ar_size = le32_to_cpu(assoc_request->AssociationTypeInfoSize);
-		ar_name = "unknown";
-
-		switch (ar_type) {
-		case AR_TYPE_WUSB:
-			/* Verify we have what is mandated by [WUSB-AM]. */
-			switch (ar_subtype) {
-			case AR_TYPE_WUSB_RETRIEVE_HOST_INFO:
-				ar_name = "RETRIEVE_HOST_INFO";
-				ar_rhi = 1;
-				break;
-			case AR_TYPE_WUSB_ASSOCIATE:
-				/* send assoc data */
-				ar_name = "ASSOCIATE";
-				ar_assoc = 1;
-				break;
-			}
-			break;
-		}
-
-		dev_dbg(dev, "Association request #%02u: 0x%04x/%04x "
-			 "(%zu bytes): %s\n",
-			 assoc_request->AssociationDataIndex, ar_type,
-			 ar_subtype, (size_t)ar_size, ar_name);
-
-		itr += sizeof(*assoc_request);
-	}
-
-	if (!ar_rhi) {
-		dev_err(dev, "Missing RETRIEVE_HOST_INFO association "
-			"request\n");
-		return -EINVAL;
-	}
-	if (!ar_assoc) {
-		dev_err(dev, "Missing ASSOCIATE association request\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static const struct wusb_cbaf_host_info cbaf_host_info_defaults = {
-	.AssociationTypeId_hdr    = WUSB_AR_AssociationTypeId,
-	.AssociationTypeId	  = cpu_to_le16(AR_TYPE_WUSB),
-	.AssociationSubTypeId_hdr = WUSB_AR_AssociationSubTypeId,
-	.AssociationSubTypeId = cpu_to_le16(AR_TYPE_WUSB_RETRIEVE_HOST_INFO),
-	.CHID_hdr                 = WUSB_AR_CHID,
-	.LangID_hdr               = WUSB_AR_LangID,
-	.HostFriendlyName_hdr     = WUSB_AR_HostFriendlyName,
-};
-
-/* Send WUSB host information (CHID and name) to a CBAF device */
-static int cbaf_send_host_info(struct cbaf *cbaf)
-{
-	struct wusb_cbaf_host_info *hi;
-	size_t name_len;
-	size_t hi_size;
-
-	hi = cbaf->buffer;
-	memset(hi, 0, sizeof(*hi));
-	*hi = cbaf_host_info_defaults;
-	hi->CHID = cbaf->chid;
-	hi->LangID = 0;	/* FIXME: I guess... */
-	strlcpy(hi->HostFriendlyName, cbaf->host_name, CBA_NAME_LEN);
-	name_len = strlen(cbaf->host_name);
-	hi->HostFriendlyName_hdr.len = cpu_to_le16(name_len);
-	hi_size = sizeof(*hi) + name_len;
-
-	return usb_control_msg(cbaf->usb_dev,
-			usb_sndctrlpipe(cbaf->usb_dev, 0),
-			CBAF_REQ_SET_ASSOCIATION_RESPONSE,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			0x0101,
-			cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			hi, hi_size, USB_CTRL_SET_TIMEOUT);
-}
-
-/*
- * Get device's information (CDID) associated to CHID
- *
- * The device will return it's information (CDID, name, bandgroups)
- * associated to the CHID we have set before, or 0 CDID and default
- * name and bandgroup if no CHID set or unknown.
- */
-static int cbaf_cdid_get(struct cbaf *cbaf)
-{
-	int result;
-	struct device *dev = &cbaf->usb_iface->dev;
-	struct wusb_cbaf_device_info *di;
-	size_t needed;
-
-	di = cbaf->buffer;
-	result = usb_control_msg(
-		cbaf->usb_dev, usb_rcvctrlpipe(cbaf->usb_dev, 0),
-		CBAF_REQ_GET_ASSOCIATION_REQUEST,
-		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		0x0200, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-		di, cbaf->buffer_size, USB_CTRL_GET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Cannot request device information: %d\n",
-			result);
-		return result;
-	}
-
-	needed = result < sizeof(*di) ? sizeof(*di) : le32_to_cpu(di->Length);
-	if (result < needed) {
-		dev_err(dev, "Not enough data in DEVICE_INFO reply (%zu vs "
-			"%zu bytes needed)\n", (size_t)result, needed);
-		return -ENOENT;
-	}
-
-	strlcpy(cbaf->device_name, di->DeviceFriendlyName, CBA_NAME_LEN);
-	cbaf->cdid = di->CDID;
-	cbaf->device_band_groups = le16_to_cpu(di->BandGroups);
-
-	return 0;
-}
-
-static ssize_t cbaf_wusb_chid_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return sprintf(buf, "%16ph\n", cbaf->chid.data);
-}
-
-static ssize_t cbaf_wusb_chid_store(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf, size_t size)
-{
-	ssize_t result;
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	result = sscanf(buf,
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx",
-			&cbaf->chid.data[0] , &cbaf->chid.data[1],
-			&cbaf->chid.data[2] , &cbaf->chid.data[3],
-			&cbaf->chid.data[4] , &cbaf->chid.data[5],
-			&cbaf->chid.data[6] , &cbaf->chid.data[7],
-			&cbaf->chid.data[8] , &cbaf->chid.data[9],
-			&cbaf->chid.data[10], &cbaf->chid.data[11],
-			&cbaf->chid.data[12], &cbaf->chid.data[13],
-			&cbaf->chid.data[14], &cbaf->chid.data[15]);
-
-	if (result != 16)
-		return -EINVAL;
-
-	result = cbaf_send_host_info(cbaf);
-	if (result < 0)
-		return result;
-	result = cbaf_cdid_get(cbaf);
-	if (result < 0)
-		return result;
-	return size;
-}
-static DEVICE_ATTR(wusb_chid, 0600, cbaf_wusb_chid_show, cbaf_wusb_chid_store);
-
-static ssize_t cbaf_wusb_host_name_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return scnprintf(buf, PAGE_SIZE, "%s\n", cbaf->host_name);
-}
-
-static ssize_t cbaf_wusb_host_name_store(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf, size_t size)
-{
-	ssize_t result;
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	result = sscanf(buf, "%63s", cbaf->host_name);
-	if (result != 1)
-		return -EINVAL;
-
-	return size;
-}
-static DEVICE_ATTR(wusb_host_name, 0600, cbaf_wusb_host_name_show,
-					 cbaf_wusb_host_name_store);
-
-static ssize_t cbaf_wusb_host_band_groups_show(struct device *dev,
-					       struct device_attribute *attr,
-					       char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return scnprintf(buf, PAGE_SIZE, "0x%04x\n", cbaf->host_band_groups);
-}
-
-static ssize_t cbaf_wusb_host_band_groups_store(struct device *dev,
-						struct device_attribute *attr,
-						const char *buf, size_t size)
-{
-	ssize_t result;
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-	u16 band_groups = 0;
-
-	result = sscanf(buf, "%04hx", &band_groups);
-	if (result != 1)
-		return -EINVAL;
-
-	cbaf->host_band_groups = band_groups;
-
-	return size;
-}
-
-static DEVICE_ATTR(wusb_host_band_groups, 0600,
-		   cbaf_wusb_host_band_groups_show,
-		   cbaf_wusb_host_band_groups_store);
-
-static const struct wusb_cbaf_device_info cbaf_device_info_defaults = {
-	.Length_hdr               = WUSB_AR_Length,
-	.CDID_hdr                 = WUSB_AR_CDID,
-	.BandGroups_hdr           = WUSB_AR_BandGroups,
-	.LangID_hdr               = WUSB_AR_LangID,
-	.DeviceFriendlyName_hdr   = WUSB_AR_DeviceFriendlyName,
-};
-
-static ssize_t cbaf_wusb_cdid_show(struct device *dev,
-				   struct device_attribute *attr, char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return sprintf(buf, "%16ph\n", cbaf->cdid.data);
-}
-
-static ssize_t cbaf_wusb_cdid_store(struct device *dev,
-				struct device_attribute *attr,
-				const char *buf, size_t size)
-{
-	ssize_t result;
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-	struct wusb_ckhdid cdid;
-
-	result = sscanf(buf,
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx",
-			&cdid.data[0] , &cdid.data[1],
-			&cdid.data[2] , &cdid.data[3],
-			&cdid.data[4] , &cdid.data[5],
-			&cdid.data[6] , &cdid.data[7],
-			&cdid.data[8] , &cdid.data[9],
-			&cdid.data[10], &cdid.data[11],
-			&cdid.data[12], &cdid.data[13],
-			&cdid.data[14], &cdid.data[15]);
-	if (result != 16)
-		return -EINVAL;
-
-	cbaf->cdid = cdid;
-
-	return size;
-}
-static DEVICE_ATTR(wusb_cdid, 0600, cbaf_wusb_cdid_show, cbaf_wusb_cdid_store);
-
-static ssize_t cbaf_wusb_device_band_groups_show(struct device *dev,
-						 struct device_attribute *attr,
-						 char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return scnprintf(buf, PAGE_SIZE, "0x%04x\n", cbaf->device_band_groups);
-}
-
-static DEVICE_ATTR(wusb_device_band_groups, 0600,
-		   cbaf_wusb_device_band_groups_show,
-		   NULL);
-
-static ssize_t cbaf_wusb_device_name_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	return scnprintf(buf, PAGE_SIZE, "%s\n", cbaf->device_name);
-}
-static DEVICE_ATTR(wusb_device_name, 0600, cbaf_wusb_device_name_show, NULL);
-
-static const struct wusb_cbaf_cc_data cbaf_cc_data_defaults = {
-	.AssociationTypeId_hdr    = WUSB_AR_AssociationTypeId,
-	.AssociationTypeId	  = cpu_to_le16(AR_TYPE_WUSB),
-	.AssociationSubTypeId_hdr = WUSB_AR_AssociationSubTypeId,
-	.AssociationSubTypeId     = cpu_to_le16(AR_TYPE_WUSB_ASSOCIATE),
-	.Length_hdr               = WUSB_AR_Length,
-	.Length		= cpu_to_le32(sizeof(struct wusb_cbaf_cc_data)),
-	.ConnectionContext_hdr    = WUSB_AR_ConnectionContext,
-	.BandGroups_hdr           = WUSB_AR_BandGroups,
-};
-
-static const struct wusb_cbaf_cc_data_fail cbaf_cc_data_fail_defaults = {
-	.AssociationTypeId_hdr    = WUSB_AR_AssociationTypeId,
-	.AssociationSubTypeId_hdr = WUSB_AR_AssociationSubTypeId,
-	.Length_hdr               = WUSB_AR_Length,
-	.AssociationStatus_hdr    = WUSB_AR_AssociationStatus,
-};
-
-/*
- * Send a new CC to the device.
- */
-static int cbaf_cc_upload(struct cbaf *cbaf)
-{
-	int result;
-	struct device *dev = &cbaf->usb_iface->dev;
-	struct wusb_cbaf_cc_data *ccd;
-
-	ccd =  cbaf->buffer;
-	*ccd = cbaf_cc_data_defaults;
-	ccd->CHID = cbaf->chid;
-	ccd->CDID = cbaf->cdid;
-	ccd->CK = cbaf->ck;
-	ccd->BandGroups = cpu_to_le16(cbaf->host_band_groups);
-
-	dev_dbg(dev, "Trying to upload CC:\n");
-	dev_dbg(dev, "  CHID       %16ph\n", ccd->CHID.data);
-	dev_dbg(dev, "  CDID       %16ph\n", ccd->CDID.data);
-	dev_dbg(dev, "  Bandgroups 0x%04x\n", cbaf->host_band_groups);
-
-	result = usb_control_msg(
-		cbaf->usb_dev, usb_sndctrlpipe(cbaf->usb_dev, 0),
-		CBAF_REQ_SET_ASSOCIATION_RESPONSE,
-		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		0x0201, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-		ccd, sizeof(*ccd), USB_CTRL_SET_TIMEOUT);
-
-	return result;
-}
-
-static ssize_t cbaf_wusb_ck_store(struct device *dev,
-				  struct device_attribute *attr,
-				  const char *buf, size_t size)
-{
-	ssize_t result;
-	struct usb_interface *iface = to_usb_interface(dev);
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-
-	result = sscanf(buf,
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx",
-			&cbaf->ck.data[0] , &cbaf->ck.data[1],
-			&cbaf->ck.data[2] , &cbaf->ck.data[3],
-			&cbaf->ck.data[4] , &cbaf->ck.data[5],
-			&cbaf->ck.data[6] , &cbaf->ck.data[7],
-			&cbaf->ck.data[8] , &cbaf->ck.data[9],
-			&cbaf->ck.data[10], &cbaf->ck.data[11],
-			&cbaf->ck.data[12], &cbaf->ck.data[13],
-			&cbaf->ck.data[14], &cbaf->ck.data[15]);
-	if (result != 16)
-		return -EINVAL;
-
-	result = cbaf_cc_upload(cbaf);
-	if (result < 0)
-		return result;
-
-	return size;
-}
-static DEVICE_ATTR(wusb_ck, 0600, NULL, cbaf_wusb_ck_store);
-
-static struct attribute *cbaf_dev_attrs[] = {
-	&dev_attr_wusb_host_name.attr,
-	&dev_attr_wusb_host_band_groups.attr,
-	&dev_attr_wusb_chid.attr,
-	&dev_attr_wusb_cdid.attr,
-	&dev_attr_wusb_device_name.attr,
-	&dev_attr_wusb_device_band_groups.attr,
-	&dev_attr_wusb_ck.attr,
-	NULL,
-};
-
-static const struct attribute_group cbaf_dev_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = cbaf_dev_attrs,
-};
-
-static int cbaf_probe(struct usb_interface *iface,
-		      const struct usb_device_id *id)
-{
-	struct cbaf *cbaf;
-	struct device *dev = &iface->dev;
-	int result = -ENOMEM;
-
-	cbaf = kzalloc(sizeof(*cbaf), GFP_KERNEL);
-	if (cbaf == NULL)
-		goto error_kzalloc;
-	cbaf->buffer = kmalloc(512, GFP_KERNEL);
-	if (cbaf->buffer == NULL)
-		goto error_kmalloc_buffer;
-
-	cbaf->buffer_size = 512;
-	cbaf->usb_dev = usb_get_dev(interface_to_usbdev(iface));
-	cbaf->usb_iface = usb_get_intf(iface);
-	result = cbaf_check(cbaf);
-	if (result < 0) {
-		dev_err(dev, "This device is not WUSB-CBAF compliant and is not supported yet.\n");
-		goto error_check;
-	}
-
-	result = sysfs_create_group(&dev->kobj, &cbaf_dev_attr_group);
-	if (result < 0) {
-		dev_err(dev, "Can't register sysfs attr group: %d\n", result);
-		goto error_create_group;
-	}
-	usb_set_intfdata(iface, cbaf);
-	return 0;
-
-error_create_group:
-error_check:
-	usb_put_intf(iface);
-	usb_put_dev(cbaf->usb_dev);
-	kfree(cbaf->buffer);
-error_kmalloc_buffer:
-	kfree(cbaf);
-error_kzalloc:
-	return result;
-}
-
-static void cbaf_disconnect(struct usb_interface *iface)
-{
-	struct cbaf *cbaf = usb_get_intfdata(iface);
-	struct device *dev = &iface->dev;
-	sysfs_remove_group(&dev->kobj, &cbaf_dev_attr_group);
-	usb_set_intfdata(iface, NULL);
-	usb_put_intf(iface);
-	usb_put_dev(cbaf->usb_dev);
-	kfree(cbaf->buffer);
-	/* paranoia: clean up crypto keys */
-	kzfree(cbaf);
-}
-
-static const struct usb_device_id cbaf_id_table[] = {
-	{ USB_INTERFACE_INFO(0xef, 0x03, 0x01), },
-	{ },
-};
-MODULE_DEVICE_TABLE(usb, cbaf_id_table);
-
-static struct usb_driver cbaf_driver = {
-	.name =		"wusb-cbaf",
-	.id_table =	cbaf_id_table,
-	.probe =	cbaf_probe,
-	.disconnect =	cbaf_disconnect,
-};
-
-module_usb_driver(cbaf_driver);
-
-MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
-MODULE_DESCRIPTION("Wireless USB Cable Based Association");
-MODULE_LICENSE("GPL");
diff --git a/drivers/usb/wusbcore/crypto.c b/drivers/usb/wusbcore/crypto.c
deleted file mode 100644
index 9ee66483ee54..000000000000
--- a/drivers/usb/wusbcore/crypto.c
+++ /dev/null
@@ -1,441 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Ultra Wide Band
- * AES-128 CCM Encryption
- *
- * Copyright (C) 2007 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * We don't do any encryption here; we use the Linux Kernel's AES-128
- * crypto modules to construct keys and payload blocks in a way
- * defined by WUSB1.0[6]. Check the erratas, as typos are are patched
- * there.
- *
- * Thanks a zillion to John Keys for his help and clarifications over
- * the designed-by-a-committee text.
- *
- * So the idea is that there is this basic Pseudo-Random-Function
- * defined in WUSB1.0[6.5] which is the core of everything. It works
- * by tweaking some blocks, AES crypting them and then xoring
- * something else with them (this seems to be called CBC(AES) -- can
- * you tell I know jack about crypto?). So we just funnel it into the
- * Linux Crypto API.
- *
- * We leave a crypto test module so we can verify that vectors match,
- * every now and then.
- *
- * Block size: 16 bytes -- AES seems to do things in 'block sizes'. I
- *             am learning a lot...
- *
- *             Conveniently, some data structures that need to be
- *             funneled through AES are...16 bytes in size!
- */
-
-#include <crypto/aes.h>
-#include <crypto/algapi.h>
-#include <crypto/hash.h>
-#include <crypto/skcipher.h>
-#include <linux/crypto.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/uwb.h>
-#include <linux/slab.h>
-#include <linux/usb/wusb.h>
-#include <linux/scatterlist.h>
-
-static int debug_crypto_verify;
-
-module_param(debug_crypto_verify, int, 0);
-MODULE_PARM_DESC(debug_crypto_verify, "verify the key generation algorithms");
-
-static void wusb_key_dump(const void *buf, size_t len)
-{
-	print_hex_dump(KERN_ERR, "  ", DUMP_PREFIX_OFFSET, 16, 1,
-		       buf, len, 0);
-}
-
-/*
- * Block of data, as understood by AES-CCM
- *
- * The code assumes this structure is nothing but a 16 byte array
- * (packed in a struct to avoid common mess ups that I usually do with
- * arrays and enforcing type checking).
- */
-struct aes_ccm_block {
-	u8 data[16];
-} __attribute__((packed));
-
-/*
- * Counter-mode Blocks (WUSB1.0[6.4])
- *
- * According to CCM (or so it seems), for the purpose of calculating
- * the MIC, the message is broken in N counter-mode blocks, B0, B1,
- * ... BN.
- *
- * B0 contains flags, the CCM nonce and l(m).
- *
- * B1 contains l(a), the MAC header, the encryption offset and padding.
- *
- * If EO is nonzero, additional blocks are built from payload bytes
- * until EO is exhausted (FIXME: padding to 16 bytes, I guess). The
- * padding is not xmitted.
- */
-
-/* WUSB1.0[T6.4] */
-struct aes_ccm_b0 {
-	u8 flags;	/* 0x59, per CCM spec */
-	struct aes_ccm_nonce ccm_nonce;
-	__be16 lm;
-} __attribute__((packed));
-
-/* WUSB1.0[T6.5] */
-struct aes_ccm_b1 {
-	__be16 la;
-	u8 mac_header[10];
-	__le16 eo;
-	u8 security_reserved;	/* This is always zero */
-	u8 padding;		/* 0 */
-} __attribute__((packed));
-
-/*
- * Encryption Blocks (WUSB1.0[6.4.4])
- *
- * CCM uses Ax blocks to generate a keystream with which the MIC and
- * the message's payload are encoded. A0 always encrypts/decrypts the
- * MIC. Ax (x>0) are used for the successive payload blocks.
- *
- * The x is the counter, and is increased for each block.
- */
-struct aes_ccm_a {
-	u8 flags;	/* 0x01, per CCM spec */
-	struct aes_ccm_nonce ccm_nonce;
-	__be16 counter;	/* Value of x */
-} __attribute__((packed));
-
-/* Scratch space for MAC calculations. */
-struct wusb_mac_scratch {
-	struct aes_ccm_b0 b0;
-	struct aes_ccm_b1 b1;
-	struct aes_ccm_a ax;
-};
-
-/*
- * CC-MAC function WUSB1.0[6.5]
- *
- * Take a data string and produce the encrypted CBC Counter-mode MIC
- *
- * Note the names for most function arguments are made to (more or
- * less) match those used in the pseudo-function definition given in
- * WUSB1.0[6.5].
- *
- * @tfm_cbc: CBC(AES) blkcipher handle (initialized)
- *
- * @tfm_aes: AES cipher handle (initialized)
- *
- * @mic: buffer for placing the computed MIC (Message Integrity
- *       Code). This is exactly 8 bytes, and we expect the buffer to
- *       be at least eight bytes in length.
- *
- * @key: 128 bit symmetric key
- *
- * @n: CCM nonce
- *
- * @a: ASCII string, 14 bytes long (I guess zero padded if needed;
- *     we use exactly 14 bytes).
- *
- * @b: data stream to be processed
- *
- * @blen: size of b...
- *
- * Still not very clear how this is done, but looks like this: we
- * create block B0 (as WUSB1.0[6.5] says), then we AES-crypt it with
- * @key. We bytewise xor B0 with B1 (1) and AES-crypt that. Then we
- * take the payload and divide it in blocks (16 bytes), xor them with
- * the previous crypto result (16 bytes) and crypt it, repeat the next
- * block with the output of the previous one, rinse wash. So we use
- * the CBC-MAC(AES) shash, that does precisely that. The IV (Initial
- * Vector) is 16 bytes and is set to zero, so
- *
- * (1) Created as 6.5 says, again, using as l(a) 'Blen + 14', and
- *     using the 14 bytes of @a to fill up
- *     b1.{mac_header,e0,security_reserved,padding}.
- *
- * NOTE: The definition of l(a) in WUSB1.0[6.5] vs the definition of
- *       l(m) is orthogonal, they bear no relationship, so it is not
- *       in conflict with the parameter's relation that
- *       WUSB1.0[6.4.2]) defines.
- *
- * NOTE: WUSB1.0[A.1]: Host Nonce is missing a nibble? (1e); fixed in
- *       first errata released on 2005/07.
- *
- * NOTE: we need to clean IV to zero at each invocation to make sure
- *       we start with a fresh empty Initial Vector, so that the CBC
- *       works ok.
- *
- * NOTE: blen is not aligned to a block size, we'll pad zeros, that's
- *       what sg[4] is for. Maybe there is a smarter way to do this.
- */
-static int wusb_ccm_mac(struct crypto_shash *tfm_cbcmac,
-			struct wusb_mac_scratch *scratch,
-			void *mic,
-			const struct aes_ccm_nonce *n,
-			const struct aes_ccm_label *a, const void *b,
-			size_t blen)
-{
-	SHASH_DESC_ON_STACK(desc, tfm_cbcmac);
-	u8 iv[AES_BLOCK_SIZE];
-
-	/*
-	 * These checks should be compile time optimized out
-	 * ensure @a fills b1's mac_header and following fields
-	 */
-	BUILD_BUG_ON(sizeof(*a) != sizeof(scratch->b1) - sizeof(scratch->b1.la));
-	BUILD_BUG_ON(sizeof(scratch->b0) != sizeof(struct aes_ccm_block));
-	BUILD_BUG_ON(sizeof(scratch->b1) != sizeof(struct aes_ccm_block));
-	BUILD_BUG_ON(sizeof(scratch->ax) != sizeof(struct aes_ccm_block));
-
-	/* Setup B0 */
-	scratch->b0.flags = 0x59;	/* Format B0 */
-	scratch->b0.ccm_nonce = *n;
-	scratch->b0.lm = cpu_to_be16(0);	/* WUSB1.0[6.5] sez l(m) is 0 */
-
-	/* Setup B1
-	 *
-	 * The WUSB spec is anything but clear! WUSB1.0[6.5]
-	 * says that to initialize B1 from A with 'l(a) = blen +
-	 * 14'--after clarification, it means to use A's contents
-	 * for MAC Header, EO, sec reserved and padding.
-	 */
-	scratch->b1.la = cpu_to_be16(blen + 14);
-	memcpy(&scratch->b1.mac_header, a, sizeof(*a));
-
-	desc->tfm = tfm_cbcmac;
-	crypto_shash_init(desc);
-	crypto_shash_update(desc, (u8 *)&scratch->b0, sizeof(scratch->b0) +
-						      sizeof(scratch->b1));
-	crypto_shash_finup(desc, b, blen, iv);
-
-	/* Now we crypt the MIC Tag (*iv) with Ax -- values per WUSB1.0[6.5]
-	 * The procedure is to AES crypt the A0 block and XOR the MIC
-	 * Tag against it; we only do the first 8 bytes and place it
-	 * directly in the destination buffer.
-	 */
-	scratch->ax.flags = 0x01;		/* as per WUSB 1.0 spec */
-	scratch->ax.ccm_nonce = *n;
-	scratch->ax.counter = 0;
-
-	/* reuse the CBC-MAC transform to perform the single block encryption */
-	crypto_shash_digest(desc, (u8 *)&scratch->ax, sizeof(scratch->ax),
-			    (u8 *)&scratch->ax);
-
-	crypto_xor_cpy(mic, (u8 *)&scratch->ax, iv, 8);
-
-	return 8;
-}
-
-/*
- * WUSB Pseudo Random Function (WUSB1.0[6.5])
- *
- * @b: buffer to the source data; cannot be a global or const local
- *     (will confuse the scatterlists)
- */
-ssize_t wusb_prf(void *out, size_t out_size,
-		 const u8 key[16], const struct aes_ccm_nonce *_n,
-		 const struct aes_ccm_label *a,
-		 const void *b, size_t blen, size_t len)
-{
-	ssize_t result, bytes = 0, bitr;
-	struct aes_ccm_nonce n = *_n;
-	struct crypto_shash *tfm_cbcmac;
-	struct wusb_mac_scratch scratch;
-	u64 sfn = 0;
-	__le64 sfn_le;
-
-	tfm_cbcmac = crypto_alloc_shash("cbcmac(aes)", 0, 0);
-	if (IS_ERR(tfm_cbcmac)) {
-		result = PTR_ERR(tfm_cbcmac);
-		printk(KERN_ERR "E: can't load CBCMAC-AES: %d\n", (int)result);
-		goto error_alloc_cbcmac;
-	}
-
-	result = crypto_shash_setkey(tfm_cbcmac, key, AES_BLOCK_SIZE);
-	if (result < 0) {
-		printk(KERN_ERR "E: can't set CBCMAC-AES key: %d\n", (int)result);
-		goto error_setkey_cbcmac;
-	}
-
-	for (bitr = 0; bitr < (len + 63) / 64; bitr++) {
-		sfn_le = cpu_to_le64(sfn++);
-		memcpy(&n.sfn, &sfn_le, sizeof(n.sfn));	/* n.sfn++... */
-		result = wusb_ccm_mac(tfm_cbcmac, &scratch, out + bytes,
-				      &n, a, b, blen);
-		if (result < 0)
-			goto error_ccm_mac;
-		bytes += result;
-	}
-	result = bytes;
-
-error_ccm_mac:
-error_setkey_cbcmac:
-	crypto_free_shash(tfm_cbcmac);
-error_alloc_cbcmac:
-	return result;
-}
-
-/* WUSB1.0[A.2] test vectors */
-static const u8 stv_hsmic_key[16] = {
-	0x4b, 0x79, 0xa3, 0xcf, 0xe5, 0x53, 0x23, 0x9d,
-	0xd7, 0xc1, 0x6d, 0x1c, 0x2d, 0xab, 0x6d, 0x3f
-};
-
-static const struct aes_ccm_nonce stv_hsmic_n = {
-	.sfn = { 0 },
-	.tkid = { 0x76, 0x98, 0x01,  },
-	.dest_addr = { .data = { 0xbe, 0x00 } },
-		.src_addr = { .data = { 0x76, 0x98 } },
-};
-
-/*
- * Out-of-band MIC Generation verification code
- *
- */
-static int wusb_oob_mic_verify(void)
-{
-	int result;
-	u8 mic[8];
-	/* WUSB1.0[A.2] test vectors */
-	static const struct usb_handshake stv_hsmic_hs = {
-		.bMessageNumber = 2,
-		.bStatus 	= 00,
-		.tTKID 		= { 0x76, 0x98, 0x01 },
-		.bReserved 	= 00,
-		.CDID 		= { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
-				    0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
-				    0x3c, 0x3d, 0x3e, 0x3f },
-		.nonce	 	= { 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
-				    0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
-				    0x2c, 0x2d, 0x2e, 0x2f },
-		.MIC	 	= { 0x75, 0x6a, 0x97, 0x51, 0x0c, 0x8c,
-				    0x14, 0x7b },
-	};
-	size_t hs_size;
-
-	result = wusb_oob_mic(mic, stv_hsmic_key, &stv_hsmic_n, &stv_hsmic_hs);
-	if (result < 0)
-		printk(KERN_ERR "E: WUSB OOB MIC test: failed: %d\n", result);
-	else if (memcmp(stv_hsmic_hs.MIC, mic, sizeof(mic))) {
-		printk(KERN_ERR "E: OOB MIC test: "
-		       "mismatch between MIC result and WUSB1.0[A2]\n");
-		hs_size = sizeof(stv_hsmic_hs) - sizeof(stv_hsmic_hs.MIC);
-		printk(KERN_ERR "E: Handshake2 in: (%zu bytes)\n", hs_size);
-		wusb_key_dump(&stv_hsmic_hs, hs_size);
-		printk(KERN_ERR "E: CCM Nonce in: (%zu bytes)\n",
-		       sizeof(stv_hsmic_n));
-		wusb_key_dump(&stv_hsmic_n, sizeof(stv_hsmic_n));
-		printk(KERN_ERR "E: MIC out:\n");
-		wusb_key_dump(mic, sizeof(mic));
-		printk(KERN_ERR "E: MIC out (from WUSB1.0[A.2]):\n");
-		wusb_key_dump(stv_hsmic_hs.MIC, sizeof(stv_hsmic_hs.MIC));
-		result = -EINVAL;
-	} else
-		result = 0;
-	return result;
-}
-
-/*
- * Test vectors for Key derivation
- *
- * These come from WUSB1.0[6.5.1], the vectors in WUSB1.0[A.1]
- * (errata corrected in 2005/07).
- */
-static const u8 stv_key_a1[16] __attribute__ ((__aligned__(4))) = {
-	0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87,
-	0x78, 0x69, 0x5a, 0x4b, 0x3c, 0x2d, 0x1e, 0x0f
-};
-
-static const struct aes_ccm_nonce stv_keydvt_n_a1 = {
-	.sfn = { 0 },
-	.tkid = { 0x76, 0x98, 0x01,  },
-	.dest_addr = { .data = { 0xbe, 0x00 } },
-	.src_addr = { .data = { 0x76, 0x98 } },
-};
-
-static const struct wusb_keydvt_out stv_keydvt_out_a1 = {
-	.kck = {
-		0x4b, 0x79, 0xa3, 0xcf, 0xe5, 0x53, 0x23, 0x9d,
-		0xd7, 0xc1, 0x6d, 0x1c, 0x2d, 0xab, 0x6d, 0x3f
-	},
-	.ptk = {
-		0xc8, 0x70, 0x62, 0x82, 0xb6, 0x7c, 0xe9, 0x06,
-		0x7b, 0xc5, 0x25, 0x69, 0xf2, 0x36, 0x61, 0x2d
-	}
-};
-
-/*
- * Performa a test to make sure we match the vectors defined in
- * WUSB1.0[A.1](Errata2006/12)
- */
-static int wusb_key_derive_verify(void)
-{
-	int result = 0;
-	struct wusb_keydvt_out keydvt_out;
-	/* These come from WUSB1.0[A.1] + 2006/12 errata */
-	static const struct wusb_keydvt_in stv_keydvt_in_a1 = {
-		.hnonce = {
-			0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
-			0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
-		},
-		.dnonce = {
-			0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
-			0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f
-		}
-	};
-
-	result = wusb_key_derive(&keydvt_out, stv_key_a1, &stv_keydvt_n_a1,
-				 &stv_keydvt_in_a1);
-	if (result < 0)
-		printk(KERN_ERR "E: WUSB key derivation test: "
-		       "derivation failed: %d\n", result);
-	if (memcmp(&stv_keydvt_out_a1, &keydvt_out, sizeof(keydvt_out))) {
-		printk(KERN_ERR "E: WUSB key derivation test: "
-		       "mismatch between key derivation result "
-		       "and WUSB1.0[A1] Errata 2006/12\n");
-		printk(KERN_ERR "E: keydvt in: key\n");
-		wusb_key_dump(stv_key_a1, sizeof(stv_key_a1));
-		printk(KERN_ERR "E: keydvt in: nonce\n");
-		wusb_key_dump(&stv_keydvt_n_a1, sizeof(stv_keydvt_n_a1));
-		printk(KERN_ERR "E: keydvt in: hnonce & dnonce\n");
-		wusb_key_dump(&stv_keydvt_in_a1, sizeof(stv_keydvt_in_a1));
-		printk(KERN_ERR "E: keydvt out: KCK\n");
-		wusb_key_dump(&keydvt_out.kck, sizeof(keydvt_out.kck));
-		printk(KERN_ERR "E: keydvt out: PTK\n");
-		wusb_key_dump(&keydvt_out.ptk, sizeof(keydvt_out.ptk));
-		result = -EINVAL;
-	} else
-		result = 0;
-	return result;
-}
-
-/*
- * Initialize crypto system
- *
- * FIXME: we do nothing now, other than verifying. Later on we'll
- * cache the encryption stuff, so that's why we have a separate init.
- */
-int wusb_crypto_init(void)
-{
-	int result;
-
-	if (debug_crypto_verify) {
-		result = wusb_key_derive_verify();
-		if (result < 0)
-			return result;
-		return wusb_oob_mic_verify();
-	}
-	return 0;
-}
-
-void wusb_crypto_exit(void)
-{
-	/* FIXME: free cached crypto transforms */
-}
diff --git a/drivers/usb/wusbcore/dev-sysfs.c b/drivers/usb/wusbcore/dev-sysfs.c
deleted file mode 100644
index 67b0a4c412b2..000000000000
--- a/drivers/usb/wusbcore/dev-sysfs.c
+++ /dev/null
@@ -1,124 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB devices
- * sysfs bindings
- *
- * Copyright (C) 2007 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * Get them out of the way...
- */
-
-#include <linux/jiffies.h>
-#include <linux/ctype.h>
-#include <linux/workqueue.h>
-#include "wusbhc.h"
-
-static ssize_t wusb_disconnect_store(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t size)
-{
-	struct usb_device *usb_dev;
-	struct wusbhc *wusbhc;
-	unsigned command;
-	u8 port_idx;
-
-	if (sscanf(buf, "%u", &command) != 1)
-		return -EINVAL;
-	if (command == 0)
-		return size;
-	usb_dev = to_usb_device(dev);
-	wusbhc = wusbhc_get_by_usb_dev(usb_dev);
-	if (wusbhc == NULL)
-		return -ENODEV;
-
-	mutex_lock(&wusbhc->mutex);
-	port_idx = wusb_port_no_to_idx(usb_dev->portnum);
-	__wusbhc_dev_disable(wusbhc, port_idx);
-	mutex_unlock(&wusbhc->mutex);
-	wusbhc_put(wusbhc);
-	return size;
-}
-static DEVICE_ATTR_WO(wusb_disconnect);
-
-static ssize_t wusb_cdid_show(struct device *dev,
-			      struct device_attribute *attr, char *buf)
-{
-	ssize_t result;
-	struct wusb_dev *wusb_dev;
-
-	wusb_dev = wusb_dev_get_by_usb_dev(to_usb_device(dev));
-	if (wusb_dev == NULL)
-		return -ENODEV;
-	result = sprintf(buf, "%16ph\n", wusb_dev->cdid.data);
-	wusb_dev_put(wusb_dev);
-	return result;
-}
-static DEVICE_ATTR_RO(wusb_cdid);
-
-static ssize_t wusb_ck_store(struct device *dev,
-			     struct device_attribute *attr,
-			     const char *buf, size_t size)
-{
-	int result;
-	struct usb_device *usb_dev;
-	struct wusbhc *wusbhc;
-	struct wusb_ckhdid ck;
-
-	result = sscanf(buf,
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx\n",
-			&ck.data[0] , &ck.data[1],
-			&ck.data[2] , &ck.data[3],
-			&ck.data[4] , &ck.data[5],
-			&ck.data[6] , &ck.data[7],
-			&ck.data[8] , &ck.data[9],
-			&ck.data[10], &ck.data[11],
-			&ck.data[12], &ck.data[13],
-			&ck.data[14], &ck.data[15]);
-	if (result != 16)
-		return -EINVAL;
-
-	usb_dev = to_usb_device(dev);
-	wusbhc = wusbhc_get_by_usb_dev(usb_dev);
-	if (wusbhc == NULL)
-		return -ENODEV;
-	result = wusb_dev_4way_handshake(wusbhc, usb_dev->wusb_dev, &ck);
-	memzero_explicit(&ck, sizeof(ck));
-	wusbhc_put(wusbhc);
-	return result < 0 ? result : size;
-}
-static DEVICE_ATTR_WO(wusb_ck);
-
-static struct attribute *wusb_dev_attrs[] = {
-		&dev_attr_wusb_disconnect.attr,
-		&dev_attr_wusb_cdid.attr,
-		&dev_attr_wusb_ck.attr,
-		NULL,
-};
-
-static const struct attribute_group wusb_dev_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = wusb_dev_attrs,
-};
-
-int wusb_dev_sysfs_add(struct wusbhc *wusbhc, struct usb_device *usb_dev,
-		       struct wusb_dev *wusb_dev)
-{
-	int result = sysfs_create_group(&usb_dev->dev.kobj,
-					&wusb_dev_attr_group);
-	struct device *dev = &usb_dev->dev;
-	if (result < 0)
-		dev_err(dev, "Cannot register WUSB-dev attributes: %d\n",
-			result);
-	return result;
-}
-
-void wusb_dev_sysfs_rm(struct wusb_dev *wusb_dev)
-{
-	struct usb_device *usb_dev = wusb_dev->usb_dev;
-	if (usb_dev)
-		sysfs_remove_group(&usb_dev->dev.kobj, &wusb_dev_attr_group);
-}
diff --git a/drivers/usb/wusbcore/devconnect.c b/drivers/usb/wusbcore/devconnect.c
deleted file mode 100644
index a93837d57d53..000000000000
--- a/drivers/usb/wusbcore/devconnect.c
+++ /dev/null
@@ -1,1085 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB Wire Adapter: Control/Data Streaming Interface (WUSB[8])
- * Device Connect handling
- *
- * Copyright (C) 2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * FIXME: docs
- * FIXME: this file needs to be broken up, it's grown too big
- *
- *
- * WUSB1.0[7.1, 7.5.1, ]
- *
- * WUSB device connection is kind of messy. Some background:
- *
- *     When a device wants to connect it scans the UWB radio channels
- *     looking for a WUSB Channel; a WUSB channel is defined by MMCs
- *     (Micro Managed Commands or something like that) [see
- *     Design-overview for more on this] .
- *
- * So, device scans the radio, finds MMCs and thus a host and checks
- * when the next DNTS is. It sends a Device Notification Connect
- * (DN_Connect); the host picks it up (through nep.c and notif.c, ends
- * up in wusb_devconnect_ack(), which creates a wusb_dev structure in
- * wusbhc->port[port_number].wusb_dev), assigns an unauth address
- * to the device (this means from 0x80 to 0xfe) and sends, in the MMC
- * a Connect Ack Information Element (ConnAck IE).
- *
- * So now the device now has a WUSB address. From now on, we use
- * that to talk to it in the RPipes.
- *
- * ASSUMPTIONS:
- *
- *  - We use the the as device address the port number where it is
- *    connected (port 0 doesn't exist). For unauth, it is 128 + that.
- *
- * ROADMAP:
- *
- *   This file contains the logic for doing that--entry points:
- *
- *   wusb_devconnect_ack()      Ack a device until _acked() called.
- *                              Called by notif.c:wusb_handle_dn_connect()
- *                              when a DN_Connect is received.
- *
- *     wusb_devconnect_acked()  Ack done, release resources.
- *
- *   wusb_handle_dn_alive()     Called by notif.c:wusb_handle_dn()
- *                              for processing a DN_Alive pong from a device.
- *
- *   wusb_handle_dn_disconnect()Called by notif.c:wusb_handle_dn() to
- *                              process a disconenct request from a
- *                              device.
- *
- *   __wusb_dev_disable()       Called by rh.c:wusbhc_rh_clear_port_feat() when
- *                              disabling a port.
- *
- *   wusb_devconnect_create()   Called when creating the host by
- *                              lc.c:wusbhc_create().
- *
- *   wusb_devconnect_destroy()  Cleanup called removing the host. Called
- *                              by lc.c:wusbhc_destroy().
- *
- *   Each Wireless USB host maintains a list of DN_Connect requests
- *   (actually we maintain a list of pending Connect Acks, the
- *   wusbhc->ca_list).
- *
- * LIFE CYCLE OF port->wusb_dev
- *
- *   Before the @wusbhc structure put()s the reference it owns for
- *   port->wusb_dev [and clean the wusb_dev pointer], it needs to
- *   lock @wusbhc->mutex.
- */
-
-#include <linux/jiffies.h>
-#include <linux/ctype.h>
-#include <linux/slab.h>
-#include <linux/workqueue.h>
-#include <linux/export.h>
-#include "wusbhc.h"
-
-static void wusbhc_devconnect_acked_work(struct work_struct *work);
-
-static void wusb_dev_free(struct wusb_dev *wusb_dev)
-{
-	kfree(wusb_dev);
-}
-
-static struct wusb_dev *wusb_dev_alloc(struct wusbhc *wusbhc)
-{
-	struct wusb_dev *wusb_dev;
-
-	wusb_dev = kzalloc(sizeof(*wusb_dev), GFP_KERNEL);
-	if (wusb_dev == NULL)
-		goto err;
-
-	wusb_dev->wusbhc = wusbhc;
-
-	INIT_WORK(&wusb_dev->devconnect_acked_work, wusbhc_devconnect_acked_work);
-
-	return wusb_dev;
-err:
-	wusb_dev_free(wusb_dev);
-	return NULL;
-}
-
-
-/*
- * Using the Connect-Ack list, fill out the @wusbhc Connect-Ack WUSB IE
- * properly so that it can be added to the MMC.
- *
- * We just get the @wusbhc->ca_list and fill out the first four ones or
- * less (per-spec WUSB1.0[7.5, before T7-38). If the ConnectAck WUSB
- * IE is not allocated, we alloc it.
- *
- * @wusbhc->mutex must be taken
- */
-static void wusbhc_fill_cack_ie(struct wusbhc *wusbhc)
-{
-	unsigned cnt;
-	struct wusb_dev *dev_itr;
-	struct wuie_connect_ack *cack_ie;
-
-	cack_ie = &wusbhc->cack_ie;
-	cnt = 0;
-	list_for_each_entry(dev_itr, &wusbhc->cack_list, cack_node) {
-		cack_ie->blk[cnt].CDID = dev_itr->cdid;
-		cack_ie->blk[cnt].bDeviceAddress = dev_itr->addr;
-		if (++cnt >= WUIE_ELT_MAX)
-			break;
-	}
-	cack_ie->hdr.bLength = sizeof(cack_ie->hdr)
-		+ cnt * sizeof(cack_ie->blk[0]);
-}
-
-/*
- * Register a new device that wants to connect
- *
- * A new device wants to connect, so we add it to the Connect-Ack
- * list. We give it an address in the unauthorized range (bit 8 set);
- * user space will have to drive authorization further on.
- *
- * @dev_addr: address to use for the device (which is also the port
- *            number).
- *
- * @wusbhc->mutex must be taken
- */
-static struct wusb_dev *wusbhc_cack_add(struct wusbhc *wusbhc,
-					struct wusb_dn_connect *dnc,
-					const char *pr_cdid, u8 port_idx)
-{
-	struct device *dev = wusbhc->dev;
-	struct wusb_dev *wusb_dev;
-	int new_connection = wusb_dn_connect_new_connection(dnc);
-	u8 dev_addr;
-	int result;
-
-	/* Is it registered already? */
-	list_for_each_entry(wusb_dev, &wusbhc->cack_list, cack_node)
-		if (!memcmp(&wusb_dev->cdid, &dnc->CDID,
-			    sizeof(wusb_dev->cdid)))
-			return wusb_dev;
-	/* We don't have it, create an entry, register it */
-	wusb_dev = wusb_dev_alloc(wusbhc);
-	if (wusb_dev == NULL)
-		return NULL;
-	wusb_dev_init(wusb_dev);
-	wusb_dev->cdid = dnc->CDID;
-	wusb_dev->port_idx = port_idx;
-
-	/*
-	 * Devices are always available within the cluster reservation
-	 * and since the hardware will take the intersection of the
-	 * per-device availability and the cluster reservation, the
-	 * per-device availability can simply be set to always
-	 * available.
-	 */
-	bitmap_fill(wusb_dev->availability.bm, UWB_NUM_MAS);
-
-	/* FIXME: handle reconnects instead of assuming connects are
-	   always new. */
-	if (1 && new_connection == 0)
-		new_connection = 1;
-	if (new_connection) {
-		dev_addr = (port_idx + 2) | WUSB_DEV_ADDR_UNAUTH;
-
-		dev_info(dev, "Connecting new WUSB device to address %u, "
-			"port %u\n", dev_addr, port_idx);
-
-		result = wusb_set_dev_addr(wusbhc, wusb_dev, dev_addr);
-		if (result < 0)
-			return NULL;
-	}
-	wusb_dev->entry_ts = jiffies;
-	list_add_tail(&wusb_dev->cack_node, &wusbhc->cack_list);
-	wusbhc->cack_count++;
-	wusbhc_fill_cack_ie(wusbhc);
-
-	return wusb_dev;
-}
-
-/*
- * Remove a Connect-Ack context entry from the HCs view
- *
- * @wusbhc->mutex must be taken
- */
-static void wusbhc_cack_rm(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	list_del_init(&wusb_dev->cack_node);
-	wusbhc->cack_count--;
-	wusbhc_fill_cack_ie(wusbhc);
-}
-
-/*
- * @wusbhc->mutex must be taken */
-static
-void wusbhc_devconnect_acked(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	wusbhc_cack_rm(wusbhc, wusb_dev);
-	if (wusbhc->cack_count)
-		wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr);
-	else
-		wusbhc_mmcie_rm(wusbhc, &wusbhc->cack_ie.hdr);
-}
-
-static void wusbhc_devconnect_acked_work(struct work_struct *work)
-{
-	struct wusb_dev *wusb_dev = container_of(work, struct wusb_dev,
-						 devconnect_acked_work);
-	struct wusbhc *wusbhc = wusb_dev->wusbhc;
-
-	mutex_lock(&wusbhc->mutex);
-	wusbhc_devconnect_acked(wusbhc, wusb_dev);
-	mutex_unlock(&wusbhc->mutex);
-
-	wusb_dev_put(wusb_dev);
-}
-
-/*
- * Ack a device for connection
- *
- * FIXME: docs
- *
- * @pr_cdid:	Printable CDID...hex Use @dnc->cdid for the real deal.
- *
- * So we get the connect ack IE (may have been allocated already),
- * find an empty connect block, an empty virtual port, create an
- * address with it (see below), make it an unauth addr [bit 7 set] and
- * set the MMC.
- *
- * Addresses: because WUSB hosts have no downstream hubs, we can do a
- *            1:1 mapping between 'port number' and device
- *            address. This simplifies many things, as during this
- *            initial connect phase the USB stack has no knowledge of
- *            the device and hasn't assigned an address yet--we know
- *            USB's choose_address() will use the same heuristics we
- *            use here, so we can assume which address will be assigned.
- *
- *            USB stack always assigns address 1 to the root hub, so
- *            to the port number we add 2 (thus virtual port #0 is
- *            addr #2).
- *
- * @wusbhc shall be referenced
- */
-static
-void wusbhc_devconnect_ack(struct wusbhc *wusbhc, struct wusb_dn_connect *dnc,
-			   const char *pr_cdid)
-{
-	int result;
-	struct device *dev = wusbhc->dev;
-	struct wusb_dev *wusb_dev;
-	struct wusb_port *port;
-	unsigned idx;
-
-	mutex_lock(&wusbhc->mutex);
-
-	/* Check we are not handling it already */
-	for (idx = 0; idx < wusbhc->ports_max; idx++) {
-		port = wusb_port_by_idx(wusbhc, idx);
-		if (port->wusb_dev
-		    && memcmp(&dnc->CDID, &port->wusb_dev->cdid, sizeof(dnc->CDID)) == 0)
-			goto error_unlock;
-	}
-	/* Look up those fake ports we have for a free one */
-	for (idx = 0; idx < wusbhc->ports_max; idx++) {
-		port = wusb_port_by_idx(wusbhc, idx);
-		if ((port->status & USB_PORT_STAT_POWER)
-		    && !(port->status & USB_PORT_STAT_CONNECTION))
-			break;
-	}
-	if (idx >= wusbhc->ports_max) {
-		dev_err(dev, "Host controller can't connect more devices "
-			"(%u already connected); device %s rejected\n",
-			wusbhc->ports_max, pr_cdid);
-		/* NOTE: we could send a WUIE_Disconnect here, but we haven't
-		 *       event acked, so the device will eventually timeout the
-		 *       connection, right? */
-		goto error_unlock;
-	}
-
-	/* Make sure we are using no crypto on that "virtual port" */
-	wusbhc->set_ptk(wusbhc, idx, 0, NULL, 0);
-
-	/* Grab a filled in Connect-Ack context, fill out the
-	 * Connect-Ack Wireless USB IE, set the MMC */
-	wusb_dev = wusbhc_cack_add(wusbhc, dnc, pr_cdid, idx);
-	if (wusb_dev == NULL)
-		goto error_unlock;
-	result = wusbhc_mmcie_set(wusbhc, 0, 0, &wusbhc->cack_ie.hdr);
-	if (result < 0)
-		goto error_unlock;
-	/* Give the device at least 2ms (WUSB1.0[7.5.1p3]), let's do
-	 * three for a good measure */
-	msleep(3);
-	port->wusb_dev = wusb_dev;
-	port->status |= USB_PORT_STAT_CONNECTION;
-	port->change |= USB_PORT_STAT_C_CONNECTION;
-	/* Now the port status changed to connected; hub_wq will
-	 * pick the change up and try to reset the port to bring it to
-	 * the enabled state--so this process returns up to the stack
-	 * and it calls back into wusbhc_rh_port_reset().
-	 */
-error_unlock:
-	mutex_unlock(&wusbhc->mutex);
-	return;
-
-}
-
-/*
- * Disconnect a Wireless USB device from its fake port
- *
- * Marks the port as disconnected so that hub_wq can pick up the change
- * and drops our knowledge about the device.
- *
- * Assumes there is a device connected
- *
- * @port_index: zero based port number
- *
- * NOTE: @wusbhc->mutex is locked
- *
- * WARNING: From here it is not very safe to access anything hanging off
- *	    wusb_dev
- */
-static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc,
-				    struct wusb_port *port)
-{
-	struct wusb_dev *wusb_dev = port->wusb_dev;
-
-	port->status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE
-			  | USB_PORT_STAT_SUSPEND | USB_PORT_STAT_RESET
-			  | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED);
-	port->change |= USB_PORT_STAT_C_CONNECTION | USB_PORT_STAT_C_ENABLE;
-	if (wusb_dev) {
-		dev_dbg(wusbhc->dev, "disconnecting device from port %d\n", wusb_dev->port_idx);
-		if (!list_empty(&wusb_dev->cack_node))
-			list_del_init(&wusb_dev->cack_node);
-		/* For the one in cack_add() */
-		wusb_dev_put(wusb_dev);
-	}
-	port->wusb_dev = NULL;
-
-	/* After a device disconnects, change the GTK (see [WUSB]
-	 * section 6.2.11.2). */
-	if (wusbhc->active)
-		wusbhc_gtk_rekey(wusbhc);
-
-	/* The Wireless USB part has forgotten about the device already; now
-	 * hub_wq's timer will pick up the disconnection and remove the USB
-	 * device from the system
-	 */
-}
-
-/*
- * Refresh the list of keep alives to emit in the MMC
- *
- * We only publish the first four devices that have a coming timeout
- * condition. Then when we are done processing those, we go for the
- * next ones. We ignore the ones that have timed out already (they'll
- * be purged).
- *
- * This might cause the first devices to timeout the last devices in
- * the port array...FIXME: come up with a better algorithm?
- *
- * Note we can't do much about MMC's ops errors; we hope next refresh
- * will kind of handle it.
- *
- * NOTE: @wusbhc->mutex is locked
- */
-static void __wusbhc_keep_alive(struct wusbhc *wusbhc)
-{
-	struct device *dev = wusbhc->dev;
-	unsigned cnt;
-	struct wusb_dev *wusb_dev;
-	struct wusb_port *wusb_port;
-	struct wuie_keep_alive *ie = &wusbhc->keep_alive_ie;
-	unsigned keep_alives, old_keep_alives;
-
-	old_keep_alives = ie->hdr.bLength - sizeof(ie->hdr);
-	keep_alives = 0;
-	for (cnt = 0;
-	     keep_alives < WUIE_ELT_MAX && cnt < wusbhc->ports_max;
-	     cnt++) {
-		unsigned tt = msecs_to_jiffies(wusbhc->trust_timeout);
-
-		wusb_port = wusb_port_by_idx(wusbhc, cnt);
-		wusb_dev = wusb_port->wusb_dev;
-
-		if (wusb_dev == NULL)
-			continue;
-		if (wusb_dev->usb_dev == NULL)
-			continue;
-
-		if (time_after(jiffies, wusb_dev->entry_ts + tt)) {
-			dev_err(dev, "KEEPALIVE: device %u timed out\n",
-				wusb_dev->addr);
-			__wusbhc_dev_disconnect(wusbhc, wusb_port);
-		} else if (time_after(jiffies, wusb_dev->entry_ts + tt/3)) {
-			/* Approaching timeout cut off, need to refresh */
-			ie->bDeviceAddress[keep_alives++] = wusb_dev->addr;
-		}
-	}
-	if (keep_alives & 0x1)	/* pad to even number ([WUSB] section 7.5.9) */
-		ie->bDeviceAddress[keep_alives++] = 0x7f;
-	ie->hdr.bLength = sizeof(ie->hdr) +
-		keep_alives*sizeof(ie->bDeviceAddress[0]);
-	if (keep_alives > 0)
-		wusbhc_mmcie_set(wusbhc, 10, 5, &ie->hdr);
-	else if (old_keep_alives != 0)
-		wusbhc_mmcie_rm(wusbhc, &ie->hdr);
-}
-
-/*
- * Do a run through all devices checking for timeouts
- */
-static void wusbhc_keep_alive_run(struct work_struct *ws)
-{
-	struct delayed_work *dw = to_delayed_work(ws);
-	struct wusbhc *wusbhc =	container_of(dw, struct wusbhc, keep_alive_timer);
-
-	mutex_lock(&wusbhc->mutex);
-	__wusbhc_keep_alive(wusbhc);
-	mutex_unlock(&wusbhc->mutex);
-
-	queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
-			   msecs_to_jiffies(wusbhc->trust_timeout / 2));
-}
-
-/*
- * Find the wusb_dev from its device address.
- *
- * The device can be found directly from the address (see
- * wusb_cack_add() for where the device address is set to port_idx
- * +2), except when the address is zero.
- */
-static struct wusb_dev *wusbhc_find_dev_by_addr(struct wusbhc *wusbhc, u8 addr)
-{
-	int p;
-
-	if (addr == 0xff) /* unconnected */
-		return NULL;
-
-	if (addr > 0) {
-		int port = (addr & ~0x80) - 2;
-		if (port < 0 || port >= wusbhc->ports_max)
-			return NULL;
-		return wusb_port_by_idx(wusbhc, port)->wusb_dev;
-	}
-
-	/* Look for the device with address 0. */
-	for (p = 0; p < wusbhc->ports_max; p++) {
-		struct wusb_dev *wusb_dev = wusb_port_by_idx(wusbhc, p)->wusb_dev;
-		if (wusb_dev && wusb_dev->addr == addr)
-			return wusb_dev;
-	}
-	return NULL;
-}
-
-/*
- * Handle a DN_Alive notification (WUSB1.0[7.6.1])
- *
- * This just updates the device activity timestamp and then refreshes
- * the keep alive IE.
- *
- * @wusbhc shall be referenced and unlocked
- */
-static void wusbhc_handle_dn_alive(struct wusbhc *wusbhc, u8 srcaddr)
-{
-	struct wusb_dev *wusb_dev;
-
-	mutex_lock(&wusbhc->mutex);
-	wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr);
-	if (wusb_dev == NULL) {
-		dev_dbg(wusbhc->dev, "ignoring DN_Alive from unconnected device %02x\n",
-			srcaddr);
-	} else {
-		wusb_dev->entry_ts = jiffies;
-		__wusbhc_keep_alive(wusbhc);
-	}
-	mutex_unlock(&wusbhc->mutex);
-}
-
-/*
- * Handle a DN_Connect notification (WUSB1.0[7.6.1])
- *
- * @wusbhc
- * @pkt_hdr
- * @size:    Size of the buffer where the notification resides; if the
- *           notification data suggests there should be more data than
- *           available, an error will be signaled and the whole buffer
- *           consumed.
- *
- * @wusbhc->mutex shall be held
- */
-static void wusbhc_handle_dn_connect(struct wusbhc *wusbhc,
-				     struct wusb_dn_hdr *dn_hdr,
-				     size_t size)
-{
-	struct device *dev = wusbhc->dev;
-	struct wusb_dn_connect *dnc;
-	char pr_cdid[WUSB_CKHDID_STRSIZE];
-	static const char *beacon_behaviour[] = {
-		"reserved",
-		"self-beacon",
-		"directed-beacon",
-		"no-beacon"
-	};
-
-	if (size < sizeof(*dnc)) {
-		dev_err(dev, "DN CONNECT: short notification (%zu < %zu)\n",
-			size, sizeof(*dnc));
-		return;
-	}
-
-	dnc = container_of(dn_hdr, struct wusb_dn_connect, hdr);
-	sprintf(pr_cdid, "%16ph", dnc->CDID.data);
-	dev_info(dev, "DN CONNECT: device %s @ %x (%s) wants to %s\n",
-		 pr_cdid,
-		 wusb_dn_connect_prev_dev_addr(dnc),
-		 beacon_behaviour[wusb_dn_connect_beacon_behavior(dnc)],
-		 wusb_dn_connect_new_connection(dnc) ? "connect" : "reconnect");
-	/* ACK the connect */
-	wusbhc_devconnect_ack(wusbhc, dnc, pr_cdid);
-}
-
-/*
- * Handle a DN_Disconnect notification (WUSB1.0[7.6.1])
- *
- * Device is going down -- do the disconnect.
- *
- * @wusbhc shall be referenced and unlocked
- */
-static void wusbhc_handle_dn_disconnect(struct wusbhc *wusbhc, u8 srcaddr)
-{
-	struct device *dev = wusbhc->dev;
-	struct wusb_dev *wusb_dev;
-
-	mutex_lock(&wusbhc->mutex);
-	wusb_dev = wusbhc_find_dev_by_addr(wusbhc, srcaddr);
-	if (wusb_dev == NULL) {
-		dev_dbg(dev, "ignoring DN DISCONNECT from unconnected device %02x\n",
-			srcaddr);
-	} else {
-		dev_info(dev, "DN DISCONNECT: device 0x%02x going down\n",
-			wusb_dev->addr);
-		__wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc,
-			wusb_dev->port_idx));
-	}
-	mutex_unlock(&wusbhc->mutex);
-}
-
-/*
- * Handle a Device Notification coming a host
- *
- * The Device Notification comes from a host (HWA, DWA or WHCI)
- * wrapped in a set of headers. Somebody else has peeled off those
- * headers for us and we just get one Device Notifications.
- *
- * Invalid DNs (e.g., too short) are discarded.
- *
- * @wusbhc shall be referenced
- *
- * FIXMES:
- *  - implement priorities as in WUSB1.0[Table 7-55]?
- */
-void wusbhc_handle_dn(struct wusbhc *wusbhc, u8 srcaddr,
-		      struct wusb_dn_hdr *dn_hdr, size_t size)
-{
-	struct device *dev = wusbhc->dev;
-
-	if (size < sizeof(struct wusb_dn_hdr)) {
-		dev_err(dev, "DN data shorter than DN header (%d < %d)\n",
-			(int)size, (int)sizeof(struct wusb_dn_hdr));
-		return;
-	}
-	switch (dn_hdr->bType) {
-	case WUSB_DN_CONNECT:
-		wusbhc_handle_dn_connect(wusbhc, dn_hdr, size);
-		break;
-	case WUSB_DN_ALIVE:
-		wusbhc_handle_dn_alive(wusbhc, srcaddr);
-		break;
-	case WUSB_DN_DISCONNECT:
-		wusbhc_handle_dn_disconnect(wusbhc, srcaddr);
-		break;
-	case WUSB_DN_MASAVAILCHANGED:
-	case WUSB_DN_RWAKE:
-	case WUSB_DN_SLEEP:
-		/* FIXME: handle these DNs. */
-		break;
-	case WUSB_DN_EPRDY:
-		/* The hardware handles these. */
-		break;
-	default:
-		dev_warn(dev, "unknown DN %u (%d octets) from %u\n",
-			 dn_hdr->bType, (int)size, srcaddr);
-	}
-}
-EXPORT_SYMBOL_GPL(wusbhc_handle_dn);
-
-/*
- * Disconnect a WUSB device from a the cluster
- *
- * @wusbhc
- * @port     Fake port where the device is (wusbhc index, not USB port number).
- *
- * In Wireless USB, a disconnect is basically telling the device he is
- * being disconnected and forgetting about him.
- *
- * We send the device a Device Disconnect IE (WUSB1.0[7.5.11]) for 100
- * ms and then keep going.
- *
- * We don't do much in case of error; we always pretend we disabled
- * the port and disconnected the device. If physically the request
- * didn't get there (many things can fail in the way there), the stack
- * will reject the device's communication attempts.
- *
- * @wusbhc should be refcounted and locked
- */
-void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port_idx)
-{
-	int result;
-	struct device *dev = wusbhc->dev;
-	struct wusb_dev *wusb_dev;
-	struct wuie_disconnect *ie;
-
-	wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev;
-	if (wusb_dev == NULL) {
-		/* reset no device? ignore */
-		dev_dbg(dev, "DISCONNECT: no device at port %u, ignoring\n",
-			port_idx);
-		return;
-	}
-	__wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx));
-
-	ie = kzalloc(sizeof(*ie), GFP_KERNEL);
-	if (ie == NULL)
-		return;
-	ie->hdr.bLength = sizeof(*ie);
-	ie->hdr.bIEIdentifier = WUIE_ID_DEVICE_DISCONNECT;
-	ie->bDeviceAddress = wusb_dev->addr;
-	result = wusbhc_mmcie_set(wusbhc, 0, 0, &ie->hdr);
-	if (result < 0)
-		dev_err(dev, "DISCONNECT: can't set MMC: %d\n", result);
-	else {
-		/* At least 6 MMCs, assuming at least 1 MMC per zone. */
-		msleep(7*4);
-		wusbhc_mmcie_rm(wusbhc, &ie->hdr);
-	}
-	kfree(ie);
-}
-
-/*
- * Walk over the BOS descriptor, verify and grok it
- *
- * @usb_dev: referenced
- * @wusb_dev: referenced and unlocked
- *
- * The BOS descriptor is defined at WUSB1.0[7.4.1], and it defines a
- * "flexible" way to wrap all kinds of descriptors inside an standard
- * descriptor (wonder why they didn't use normal descriptors,
- * btw). Not like they lack code.
- *
- * At the end we go to look for the WUSB Device Capabilities
- * (WUSB1.0[7.4.1.1]) that is wrapped in a device capability descriptor
- * that is part of the BOS descriptor set. That tells us what does the
- * device support (dual role, beacon type, UWB PHY rates).
- */
-static int wusb_dev_bos_grok(struct usb_device *usb_dev,
-			     struct wusb_dev *wusb_dev,
-			     struct usb_bos_descriptor *bos, size_t desc_size)
-{
-	ssize_t result;
-	struct device *dev = &usb_dev->dev;
-	void *itr, *top;
-
-	/* Walk over BOS capabilities, verify them */
-	itr = (void *)bos + sizeof(*bos);
-	top = itr + desc_size - sizeof(*bos);
-	while (itr < top) {
-		struct usb_dev_cap_header *cap_hdr = itr;
-		size_t cap_size;
-		u8 cap_type;
-		if (top - itr < sizeof(*cap_hdr)) {
-			dev_err(dev, "Device BUG? premature end of BOS header "
-				"data [offset 0x%02x]: only %zu bytes left\n",
-				(int)(itr - (void *)bos), top - itr);
-			result = -ENOSPC;
-			goto error_bad_cap;
-		}
-		cap_size = cap_hdr->bLength;
-		cap_type = cap_hdr->bDevCapabilityType;
-		if (cap_size == 0)
-			break;
-		if (cap_size > top - itr) {
-			dev_err(dev, "Device BUG? premature end of BOS data "
-				"[offset 0x%02x cap %02x %zu bytes]: "
-				"only %zu bytes left\n",
-				(int)(itr - (void *)bos),
-				cap_type, cap_size, top - itr);
-			result = -EBADF;
-			goto error_bad_cap;
-		}
-		switch (cap_type) {
-		case USB_CAP_TYPE_WIRELESS_USB:
-			if (cap_size != sizeof(*wusb_dev->wusb_cap_descr))
-				dev_err(dev, "Device BUG? WUSB Capability "
-					"descriptor is %zu bytes vs %zu "
-					"needed\n", cap_size,
-					sizeof(*wusb_dev->wusb_cap_descr));
-			else
-				wusb_dev->wusb_cap_descr = itr;
-			break;
-		default:
-			dev_err(dev, "BUG? Unknown BOS capability 0x%02x "
-				"(%zu bytes) at offset 0x%02x\n", cap_type,
-				cap_size, (int)(itr - (void *)bos));
-		}
-		itr += cap_size;
-	}
-	result = 0;
-error_bad_cap:
-	return result;
-}
-
-/*
- * Add information from the BOS descriptors to the device
- *
- * @usb_dev: referenced
- * @wusb_dev: referenced and unlocked
- *
- * So what we do is we alloc a space for the BOS descriptor of 64
- * bytes; read the first four bytes which include the wTotalLength
- * field (WUSB1.0[T7-26]) and if it fits in those 64 bytes, read the
- * whole thing. If not we realloc to that size.
- *
- * Then we call the groking function, that will fill up
- * wusb_dev->wusb_cap_descr, which is what we'll need later on.
- */
-static int wusb_dev_bos_add(struct usb_device *usb_dev,
-			    struct wusb_dev *wusb_dev)
-{
-	ssize_t result;
-	struct device *dev = &usb_dev->dev;
-	struct usb_bos_descriptor *bos;
-	size_t alloc_size = 32, desc_size = 4;
-
-	bos = kmalloc(alloc_size, GFP_KERNEL);
-	if (bos == NULL)
-		return -ENOMEM;
-	result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size);
-	if (result < 4) {
-		dev_err(dev, "Can't get BOS descriptor or too short: %zd\n",
-			result);
-		goto error_get_descriptor;
-	}
-	desc_size = le16_to_cpu(bos->wTotalLength);
-	if (desc_size >= alloc_size) {
-		kfree(bos);
-		alloc_size = desc_size;
-		bos = kmalloc(alloc_size, GFP_KERNEL);
-		if (bos == NULL)
-			return -ENOMEM;
-	}
-	result = usb_get_descriptor(usb_dev, USB_DT_BOS, 0, bos, desc_size);
-	if (result < 0 || result != desc_size) {
-		dev_err(dev, "Can't get  BOS descriptor or too short (need "
-			"%zu bytes): %zd\n", desc_size, result);
-		goto error_get_descriptor;
-	}
-	if (result < sizeof(*bos)
-	    || le16_to_cpu(bos->wTotalLength) != desc_size) {
-		dev_err(dev, "Can't get  BOS descriptor or too short (need "
-			"%zu bytes): %zd\n", desc_size, result);
-		goto error_get_descriptor;
-	}
-
-	result = wusb_dev_bos_grok(usb_dev, wusb_dev, bos, result);
-	if (result < 0)
-		goto error_bad_bos;
-	wusb_dev->bos = bos;
-	return 0;
-
-error_bad_bos:
-error_get_descriptor:
-	kfree(bos);
-	wusb_dev->wusb_cap_descr = NULL;
-	return result;
-}
-
-static void wusb_dev_bos_rm(struct wusb_dev *wusb_dev)
-{
-	kfree(wusb_dev->bos);
-	wusb_dev->wusb_cap_descr = NULL;
-};
-
-/*
- * USB stack's device addition Notifier Callback
- *
- * Called from drivers/usb/core/hub.c when a new device is added; we
- * use this hook to perform certain WUSB specific setup work on the
- * new device. As well, it is the first time we can connect the
- * wusb_dev and the usb_dev. So we note it down in wusb_dev and take a
- * reference that we'll drop.
- *
- * First we need to determine if the device is a WUSB device (else we
- * ignore it). For that we use the speed setting (USB_SPEED_WIRELESS)
- * [FIXME: maybe we'd need something more definitive]. If so, we track
- * it's usb_busd and from there, the WUSB HC.
- *
- * Because all WUSB HCs are contained in a 'struct wusbhc', voila, we
- * get the wusbhc for the device.
- *
- * We have a reference on @usb_dev (as we are called at the end of its
- * enumeration).
- *
- * NOTE: @usb_dev locked
- */
-static void wusb_dev_add_ncb(struct usb_device *usb_dev)
-{
-	int result = 0;
-	struct wusb_dev *wusb_dev;
-	struct wusbhc *wusbhc;
-	struct device *dev = &usb_dev->dev;
-	u8 port_idx;
-
-	if (usb_dev->wusb == 0 || usb_dev->devnum == 1)
-		return;		/* skip non wusb and wusb RHs */
-
-	usb_set_device_state(usb_dev, USB_STATE_UNAUTHENTICATED);
-
-	wusbhc = wusbhc_get_by_usb_dev(usb_dev);
-	if (wusbhc == NULL)
-		goto error_nodev;
-	mutex_lock(&wusbhc->mutex);
-	wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev);
-	port_idx = wusb_port_no_to_idx(usb_dev->portnum);
-	mutex_unlock(&wusbhc->mutex);
-	if (wusb_dev == NULL)
-		goto error_nodev;
-	wusb_dev->usb_dev = usb_get_dev(usb_dev);
-	usb_dev->wusb_dev = wusb_dev_get(wusb_dev);
-	result = wusb_dev_sec_add(wusbhc, usb_dev, wusb_dev);
-	if (result < 0) {
-		dev_err(dev, "Cannot enable security: %d\n", result);
-		goto error_sec_add;
-	}
-	/* Now query the device for it's BOS and attach it to wusb_dev */
-	result = wusb_dev_bos_add(usb_dev, wusb_dev);
-	if (result < 0) {
-		dev_err(dev, "Cannot get BOS descriptors: %d\n", result);
-		goto error_bos_add;
-	}
-	result = wusb_dev_sysfs_add(wusbhc, usb_dev, wusb_dev);
-	if (result < 0)
-		goto error_add_sysfs;
-out:
-	wusb_dev_put(wusb_dev);
-	wusbhc_put(wusbhc);
-error_nodev:
-	return;
-
-error_add_sysfs:
-	wusb_dev_bos_rm(wusb_dev);
-error_bos_add:
-	wusb_dev_sec_rm(wusb_dev);
-error_sec_add:
-	mutex_lock(&wusbhc->mutex);
-	__wusbhc_dev_disconnect(wusbhc, wusb_port_by_idx(wusbhc, port_idx));
-	mutex_unlock(&wusbhc->mutex);
-	goto out;
-}
-
-/*
- * Undo all the steps done at connection by the notifier callback
- *
- * NOTE: @usb_dev locked
- */
-static void wusb_dev_rm_ncb(struct usb_device *usb_dev)
-{
-	struct wusb_dev *wusb_dev = usb_dev->wusb_dev;
-
-	if (usb_dev->wusb == 0 || usb_dev->devnum == 1)
-		return;		/* skip non wusb and wusb RHs */
-
-	wusb_dev_sysfs_rm(wusb_dev);
-	wusb_dev_bos_rm(wusb_dev);
-	wusb_dev_sec_rm(wusb_dev);
-	wusb_dev->usb_dev = NULL;
-	usb_dev->wusb_dev = NULL;
-	wusb_dev_put(wusb_dev);
-	usb_put_dev(usb_dev);
-}
-
-/*
- * Handle notifications from the USB stack (notifier call back)
- *
- * This is called when the USB stack does a
- * usb_{bus,device}_{add,remove}() so we can do WUSB specific
- * handling. It is called with [for the case of
- * USB_DEVICE_{ADD,REMOVE} with the usb_dev locked.
- */
-int wusb_usb_ncb(struct notifier_block *nb, unsigned long val,
-		 void *priv)
-{
-	int result = NOTIFY_OK;
-
-	switch (val) {
-	case USB_DEVICE_ADD:
-		wusb_dev_add_ncb(priv);
-		break;
-	case USB_DEVICE_REMOVE:
-		wusb_dev_rm_ncb(priv);
-		break;
-	case USB_BUS_ADD:
-		/* ignore (for now) */
-	case USB_BUS_REMOVE:
-		break;
-	default:
-		WARN_ON(1);
-		result = NOTIFY_BAD;
-	}
-	return result;
-}
-
-/*
- * Return a referenced wusb_dev given a @wusbhc and @usb_dev
- */
-struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *wusbhc,
-					   struct usb_device *usb_dev)
-{
-	struct wusb_dev *wusb_dev;
-	u8 port_idx;
-
-	port_idx = wusb_port_no_to_idx(usb_dev->portnum);
-	BUG_ON(port_idx > wusbhc->ports_max);
-	wusb_dev = wusb_port_by_idx(wusbhc, port_idx)->wusb_dev;
-	if (wusb_dev != NULL)		/* ops, device is gone */
-		wusb_dev_get(wusb_dev);
-	return wusb_dev;
-}
-EXPORT_SYMBOL_GPL(__wusb_dev_get_by_usb_dev);
-
-void wusb_dev_destroy(struct kref *_wusb_dev)
-{
-	struct wusb_dev *wusb_dev = container_of(_wusb_dev, struct wusb_dev, refcnt);
-
-	list_del_init(&wusb_dev->cack_node);
-	wusb_dev_free(wusb_dev);
-}
-EXPORT_SYMBOL_GPL(wusb_dev_destroy);
-
-/*
- * Create all the device connect handling infrastructure
- *
- * This is basically the device info array, Connect Acknowledgement
- * (cack) lists, keep-alive timers (and delayed work thread).
- */
-int wusbhc_devconnect_create(struct wusbhc *wusbhc)
-{
-	wusbhc->keep_alive_ie.hdr.bIEIdentifier = WUIE_ID_KEEP_ALIVE;
-	wusbhc->keep_alive_ie.hdr.bLength = sizeof(wusbhc->keep_alive_ie.hdr);
-	INIT_DELAYED_WORK(&wusbhc->keep_alive_timer, wusbhc_keep_alive_run);
-
-	wusbhc->cack_ie.hdr.bIEIdentifier = WUIE_ID_CONNECTACK;
-	wusbhc->cack_ie.hdr.bLength = sizeof(wusbhc->cack_ie.hdr);
-	INIT_LIST_HEAD(&wusbhc->cack_list);
-
-	return 0;
-}
-
-/*
- * Release all resources taken by the devconnect stuff
- */
-void wusbhc_devconnect_destroy(struct wusbhc *wusbhc)
-{
-	/* no op */
-}
-
-/*
- * wusbhc_devconnect_start - start accepting device connections
- * @wusbhc: the WUSB HC
- *
- * Sets the Host Info IE to accept all new connections.
- *
- * FIXME: This also enables the keep alives but this is not necessary
- * until there are connected and authenticated devices.
- */
-int wusbhc_devconnect_start(struct wusbhc *wusbhc)
-{
-	struct device *dev = wusbhc->dev;
-	struct wuie_host_info *hi;
-	int result;
-
-	hi = kzalloc(sizeof(*hi), GFP_KERNEL);
-	if (hi == NULL)
-		return -ENOMEM;
-
-	hi->hdr.bLength       = sizeof(*hi);
-	hi->hdr.bIEIdentifier = WUIE_ID_HOST_INFO;
-	hi->attributes        = cpu_to_le16((wusbhc->rsv->stream << 3) | WUIE_HI_CAP_ALL);
-	hi->CHID              = wusbhc->chid;
-	result = wusbhc_mmcie_set(wusbhc, 0, 0, &hi->hdr);
-	if (result < 0) {
-		dev_err(dev, "Cannot add Host Info MMCIE: %d\n", result);
-		goto error_mmcie_set;
-	}
-	wusbhc->wuie_host_info = hi;
-
-	queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
-			   msecs_to_jiffies(wusbhc->trust_timeout / 2));
-
-	return 0;
-
-error_mmcie_set:
-	kfree(hi);
-	return result;
-}
-
-/*
- * wusbhc_devconnect_stop - stop managing connected devices
- * @wusbhc: the WUSB HC
- *
- * Disconnects any devices still connected, stops the keep alives and
- * removes the Host Info IE.
- */
-void wusbhc_devconnect_stop(struct wusbhc *wusbhc)
-{
-	int i;
-
-	mutex_lock(&wusbhc->mutex);
-	for (i = 0; i < wusbhc->ports_max; i++) {
-		if (wusbhc->port[i].wusb_dev)
-			__wusbhc_dev_disconnect(wusbhc, &wusbhc->port[i]);
-	}
-	mutex_unlock(&wusbhc->mutex);
-
-	cancel_delayed_work_sync(&wusbhc->keep_alive_timer);
-	wusbhc_mmcie_rm(wusbhc, &wusbhc->wuie_host_info->hdr);
-	kfree(wusbhc->wuie_host_info);
-	wusbhc->wuie_host_info = NULL;
-}
-
-/*
- * wusb_set_dev_addr - set the WUSB device address used by the host
- * @wusbhc: the WUSB HC the device is connect to
- * @wusb_dev: the WUSB device
- * @addr: new device address
- */
-int wusb_set_dev_addr(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev, u8 addr)
-{
-	int result;
-
-	wusb_dev->addr = addr;
-	result = wusbhc->dev_info_set(wusbhc, wusb_dev);
-	if (result < 0)
-		dev_err(wusbhc->dev, "device %d: failed to set device "
-			"address\n", wusb_dev->port_idx);
-	else
-		dev_info(wusbhc->dev, "device %d: %s addr %u\n",
-			 wusb_dev->port_idx,
-			 (addr & WUSB_DEV_ADDR_UNAUTH) ? "unauth" : "auth",
-			 wusb_dev->addr);
-
-	return result;
-}
diff --git a/drivers/usb/wusbcore/mmc.c b/drivers/usb/wusbcore/mmc.c
deleted file mode 100644
index acce0d551eb2..000000000000
--- a/drivers/usb/wusbcore/mmc.c
+++ /dev/null
@@ -1,303 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB Wire Adapter: Control/Data Streaming Interface (WUSB[8])
- * MMC (Microscheduled Management Command) handling
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * WUIEs and MMC IEs...well, they are almost the same at the end. MMC
- * IEs are Wireless USB IEs that go into the MMC period...[what is
- * that? look in Design-overview.txt].
- *
- *
- * This is a simple subsystem to keep track of which IEs are being
- * sent by the host in the MMC period.
- *
- * For each WUIE we ask to send, we keep it in an array, so we can
- * request its removal later, or replace the content. They are tracked
- * by pointer, so be sure to use the same pointer if you want to
- * remove it or update the contents.
- *
- * FIXME:
- *  - add timers that autoremove intervalled IEs?
- */
-#include <linux/usb/wusb.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include "wusbhc.h"
-
-/* Initialize the MMCIEs handling mechanism */
-int wusbhc_mmcie_create(struct wusbhc *wusbhc)
-{
-	u8 mmcies = wusbhc->mmcies_max;
-	wusbhc->mmcie = kcalloc(mmcies, sizeof(wusbhc->mmcie[0]), GFP_KERNEL);
-	if (wusbhc->mmcie == NULL)
-		return -ENOMEM;
-	mutex_init(&wusbhc->mmcie_mutex);
-	return 0;
-}
-
-/* Release resources used by the MMCIEs handling mechanism */
-void wusbhc_mmcie_destroy(struct wusbhc *wusbhc)
-{
-	kfree(wusbhc->mmcie);
-}
-
-/*
- * Add or replace an MMC Wireless USB IE.
- *
- * @interval:    See WUSB1.0[8.5.3.1]
- * @repeat_cnt:  See WUSB1.0[8.5.3.1]
- * @handle:      See WUSB1.0[8.5.3.1]
- * @wuie:        Pointer to the header of the WUSB IE data to add.
- *               MUST BE allocated in a kmalloc buffer (no stack or
- *               vmalloc).
- *               THE CALLER ALWAYS OWNS THE POINTER (we don't free it
- *               on remove, we just forget about it).
- * @returns:     0 if ok, < 0 errno code on error.
- *
- * Goes over the *whole* @wusbhc->mmcie array looking for (a) the
- * first free spot and (b) if @wuie is already in the array (aka:
- * transmitted in the MMCs) the spot were it is.
- *
- * If present, we "overwrite it" (update).
- *
- *
- * NOTE: Need special ordering rules -- see below WUSB1.0 Table 7-38.
- *       The host uses the handle as the 'sort' index. We
- *       allocate the last one always for the WUIE_ID_HOST_INFO, and
- *       the rest, first come first serve in inverse order.
- *
- *       Host software must make sure that it adds the other IEs in
- *       the right order... the host hardware is responsible for
- *       placing the WCTA IEs in the right place with the other IEs
- *       set by host software.
- *
- * NOTE: we can access wusbhc->wa_descr without locking because it is
- *       read only.
- */
-int wusbhc_mmcie_set(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
-		     struct wuie_hdr *wuie)
-{
-	int result = -ENOBUFS;
-	unsigned handle, itr;
-
-	/* Search a handle, taking into account the ordering */
-	mutex_lock(&wusbhc->mmcie_mutex);
-	switch (wuie->bIEIdentifier) {
-	case WUIE_ID_HOST_INFO:
-		/* Always last */
-		handle = wusbhc->mmcies_max - 1;
-		break;
-	case WUIE_ID_ISOCH_DISCARD:
-		dev_err(wusbhc->dev, "Special ordering case for WUIE ID 0x%x "
-			"unimplemented\n", wuie->bIEIdentifier);
-		result = -ENOSYS;
-		goto error_unlock;
-	default:
-		/* search for it or find the last empty slot */
-		handle = ~0;
-		for (itr = 0; itr < wusbhc->mmcies_max - 1; itr++) {
-			if (wusbhc->mmcie[itr] == wuie) {
-				handle = itr;
-				break;
-			}
-			if (wusbhc->mmcie[itr] == NULL)
-				handle = itr;
-		}
-		if (handle == ~0)
-			goto error_unlock;
-	}
-	result = (wusbhc->mmcie_add)(wusbhc, interval, repeat_cnt, handle,
-				     wuie);
-	if (result >= 0)
-		wusbhc->mmcie[handle] = wuie;
-error_unlock:
-	mutex_unlock(&wusbhc->mmcie_mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_mmcie_set);
-
-/*
- * Remove an MMC IE previously added with wusbhc_mmcie_set()
- *
- * @wuie	Pointer used to add the WUIE
- */
-void wusbhc_mmcie_rm(struct wusbhc *wusbhc, struct wuie_hdr *wuie)
-{
-	int result;
-	unsigned handle, itr;
-
-	mutex_lock(&wusbhc->mmcie_mutex);
-	for (itr = 0; itr < wusbhc->mmcies_max; itr++) {
-		if (wusbhc->mmcie[itr] == wuie) {
-			handle = itr;
-			goto found;
-		}
-	}
-	mutex_unlock(&wusbhc->mmcie_mutex);
-	return;
-
-found:
-	result = (wusbhc->mmcie_rm)(wusbhc, handle);
-	if (result == 0)
-		wusbhc->mmcie[itr] = NULL;
-	mutex_unlock(&wusbhc->mmcie_mutex);
-}
-EXPORT_SYMBOL_GPL(wusbhc_mmcie_rm);
-
-static int wusbhc_mmc_start(struct wusbhc *wusbhc)
-{
-	int ret;
-
-	mutex_lock(&wusbhc->mutex);
-	ret = wusbhc->start(wusbhc);
-	if (ret >= 0)
-		wusbhc->active = 1;
-	mutex_unlock(&wusbhc->mutex);
-
-	return ret;
-}
-
-static void wusbhc_mmc_stop(struct wusbhc *wusbhc)
-{
-	mutex_lock(&wusbhc->mutex);
-	wusbhc->active = 0;
-	wusbhc->stop(wusbhc, WUSB_CHANNEL_STOP_DELAY_MS);
-	mutex_unlock(&wusbhc->mutex);
-}
-
-/*
- * wusbhc_start - start transmitting MMCs and accepting connections
- * @wusbhc: the HC to start
- *
- * Establishes a cluster reservation, enables device connections, and
- * starts MMCs with appropriate DNTS parameters.
- */
-int wusbhc_start(struct wusbhc *wusbhc)
-{
-	int result;
-	struct device *dev = wusbhc->dev;
-
-	WARN_ON(wusbhc->wuie_host_info != NULL);
-	BUG_ON(wusbhc->uwb_rc == NULL);
-
-	result = wusbhc_rsv_establish(wusbhc);
-	if (result < 0) {
-		dev_err(dev, "cannot establish cluster reservation: %d\n",
-			result);
-		goto error_rsv_establish;
-	}
-
-	result = wusbhc_devconnect_start(wusbhc);
-	if (result < 0) {
-		dev_err(dev, "error enabling device connections: %d\n",
-			result);
-		goto error_devconnect_start;
-	}
-
-	result = wusbhc_sec_start(wusbhc);
-	if (result < 0) {
-		dev_err(dev, "error starting security in the HC: %d\n",
-			result);
-		goto error_sec_start;
-	}
-
-	result = wusbhc->set_num_dnts(wusbhc, wusbhc->dnts_interval,
-		wusbhc->dnts_num_slots);
-	if (result < 0) {
-		dev_err(dev, "Cannot set DNTS parameters: %d\n", result);
-		goto error_set_num_dnts;
-	}
-	result = wusbhc_mmc_start(wusbhc);
-	if (result < 0) {
-		dev_err(dev, "error starting wusbch: %d\n", result);
-		goto error_wusbhc_start;
-	}
-
-	return 0;
-
-error_wusbhc_start:
-	wusbhc_sec_stop(wusbhc);
-error_set_num_dnts:
-error_sec_start:
-	wusbhc_devconnect_stop(wusbhc);
-error_devconnect_start:
-	wusbhc_rsv_terminate(wusbhc);
-error_rsv_establish:
-	return result;
-}
-
-/*
- * wusbhc_stop - stop transmitting MMCs
- * @wusbhc: the HC to stop
- *
- * Stops the WUSB channel and removes the cluster reservation.
- */
-void wusbhc_stop(struct wusbhc *wusbhc)
-{
-	wusbhc_mmc_stop(wusbhc);
-	wusbhc_sec_stop(wusbhc);
-	wusbhc_devconnect_stop(wusbhc);
-	wusbhc_rsv_terminate(wusbhc);
-}
-
-/*
- * Set/reset/update a new CHID
- *
- * Depending on the previous state of the MMCs, start, stop or change
- * the sent MMC. This effectively switches the host controller on and
- * off (radio wise).
- */
-int wusbhc_chid_set(struct wusbhc *wusbhc, const struct wusb_ckhdid *chid)
-{
-	int result = 0;
-
-	if (memcmp(chid, &wusb_ckhdid_zero, sizeof(*chid)) == 0)
-		chid = NULL;
-
-	mutex_lock(&wusbhc->mutex);
-	if (chid) {
-		if (wusbhc->active) {
-			mutex_unlock(&wusbhc->mutex);
-			return -EBUSY;
-		}
-		wusbhc->chid = *chid;
-	}
-
-	/* register with UWB if we haven't already since we are about to start
-	    the radio. */
-	if ((chid) && (wusbhc->uwb_rc == NULL)) {
-		wusbhc->uwb_rc = uwb_rc_get_by_grandpa(wusbhc->dev->parent);
-		if (wusbhc->uwb_rc == NULL) {
-			result = -ENODEV;
-			dev_err(wusbhc->dev,
-				"Cannot get associated UWB Host Controller\n");
-			goto error_rc_get;
-		}
-
-		result = wusbhc_pal_register(wusbhc);
-		if (result < 0) {
-			dev_err(wusbhc->dev, "Cannot register as a UWB PAL\n");
-			goto error_pal_register;
-		}
-	}
-	mutex_unlock(&wusbhc->mutex);
-
-	if (chid)
-		result = uwb_radio_start(&wusbhc->pal);
-	else if (wusbhc->uwb_rc)
-		uwb_radio_stop(&wusbhc->pal);
-
-	return result;
-
-error_pal_register:
-	uwb_rc_put(wusbhc->uwb_rc);
-	wusbhc->uwb_rc = NULL;
-error_rc_get:
-	mutex_unlock(&wusbhc->mutex);
-
-	return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_chid_set);
diff --git a/drivers/usb/wusbcore/pal.c b/drivers/usb/wusbcore/pal.c
deleted file mode 100644
index 30f569131471..000000000000
--- a/drivers/usb/wusbcore/pal.c
+++ /dev/null
@@ -1,45 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * UWB Protocol Adaptation Layer (PAL) glue.
- *
- * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
- */
-#include "wusbhc.h"
-
-static void wusbhc_channel_changed(struct uwb_pal *pal, int channel)
-{
-	struct wusbhc *wusbhc = container_of(pal, struct wusbhc, pal);
-
-	dev_dbg(wusbhc->dev, "%s: channel = %d\n", __func__, channel);
-	if (channel < 0)
-		wusbhc_stop(wusbhc);
-	else
-		wusbhc_start(wusbhc);
-}
-
-/**
- * wusbhc_pal_register - register the WUSB HC as a UWB PAL
- * @wusbhc: the WUSB HC
- */
-int wusbhc_pal_register(struct wusbhc *wusbhc)
-{
-	uwb_pal_init(&wusbhc->pal);
-
-	wusbhc->pal.name   = "wusbhc";
-	wusbhc->pal.device = wusbhc->usb_hcd.self.controller;
-	wusbhc->pal.rc     = wusbhc->uwb_rc;
-	wusbhc->pal.channel_changed = wusbhc_channel_changed;
-
-	return uwb_pal_register(&wusbhc->pal);
-}
-
-/**
- * wusbhc_pal_unregister - unregister the WUSB HC as a UWB PAL
- * @wusbhc: the WUSB HC
- */
-void wusbhc_pal_unregister(struct wusbhc *wusbhc)
-{
-	if (wusbhc->uwb_rc)
-		uwb_pal_unregister(&wusbhc->pal);
-}
diff --git a/drivers/usb/wusbcore/reservation.c b/drivers/usb/wusbcore/reservation.c
deleted file mode 100644
index 6dcfc6825f55..000000000000
--- a/drivers/usb/wusbcore/reservation.c
+++ /dev/null
@@ -1,110 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB cluster reservation management
- *
- * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- */
-#include <linux/kernel.h>
-#include <linux/uwb.h>
-
-#include "wusbhc.h"
-
-/*
- * WUSB cluster reservations are multicast reservations with the
- * broadcast cluster ID (BCID) as the target DevAddr.
- *
- * FIXME: consider adjusting the reservation depending on what devices
- * are attached.
- */
-
-static int wusbhc_bwa_set(struct wusbhc *wusbhc, u8 stream,
-	const struct uwb_mas_bm *mas)
-{
-	if (mas == NULL)
-		mas = &uwb_mas_bm_zero;
-	return wusbhc->bwa_set(wusbhc, stream, mas);
-}
-
-/**
- * wusbhc_rsv_complete_cb - WUSB HC reservation complete callback
- * @rsv:    the reservation
- *
- * Either set or clear the HC's view of the reservation.
- *
- * FIXME: when a reservation is denied the HC should be stopped.
- */
-static void wusbhc_rsv_complete_cb(struct uwb_rsv *rsv)
-{
-	struct wusbhc *wusbhc = rsv->pal_priv;
-	struct device *dev = wusbhc->dev;
-	struct uwb_mas_bm mas;
-
-	dev_dbg(dev, "%s: state = %d\n", __func__, rsv->state);
-	switch (rsv->state) {
-	case UWB_RSV_STATE_O_ESTABLISHED:
-		uwb_rsv_get_usable_mas(rsv, &mas);
-		dev_dbg(dev, "established reservation: %*pb\n",
-			UWB_NUM_MAS, mas.bm);
-		wusbhc_bwa_set(wusbhc, rsv->stream, &mas);
-		break;
-	case UWB_RSV_STATE_NONE:
-		dev_dbg(dev, "removed reservation\n");
-		wusbhc_bwa_set(wusbhc, 0, NULL);
-		break;
-	default:
-		dev_dbg(dev, "unexpected reservation state: %d\n", rsv->state);
-		break;
-	}
-}
-
-
-/**
- * wusbhc_rsv_establish - establish a reservation for the cluster
- * @wusbhc: the WUSB HC requesting a bandwidth reservation
- */
-int wusbhc_rsv_establish(struct wusbhc *wusbhc)
-{
-	struct uwb_rc *rc = wusbhc->uwb_rc;
-	struct uwb_rsv *rsv;
-	struct uwb_dev_addr bcid;
-	int ret;
-
-	if (rc == NULL)
-		return -ENODEV;
-
-	rsv = uwb_rsv_create(rc, wusbhc_rsv_complete_cb, wusbhc);
-	if (rsv == NULL)
-		return -ENOMEM;
-
-	bcid.data[0] = wusbhc->cluster_id;
-	bcid.data[1] = 0;
-
-	rsv->target.type = UWB_RSV_TARGET_DEVADDR;
-	rsv->target.devaddr = bcid;
-	rsv->type = UWB_DRP_TYPE_PRIVATE;
-	rsv->max_mas = 256; /* try to get as much as possible */
-	rsv->min_mas = 15;  /* one MAS per zone */
-	rsv->max_interval = 1; /* max latency is one zone */
-	rsv->is_multicast = true;
-
-	ret = uwb_rsv_establish(rsv);
-	if (ret == 0)
-		wusbhc->rsv = rsv;
-	else
-		uwb_rsv_destroy(rsv);
-	return ret;
-}
-
-
-/**
- * wusbhc_rsv_terminate - terminate the cluster reservation
- * @wusbhc: the WUSB host whose reservation is to be terminated
- */
-void wusbhc_rsv_terminate(struct wusbhc *wusbhc)
-{
-	if (wusbhc->rsv) {
-		uwb_rsv_terminate(wusbhc->rsv);
-		uwb_rsv_destroy(wusbhc->rsv);
-		wusbhc->rsv = NULL;
-	}
-}
diff --git a/drivers/usb/wusbcore/rh.c b/drivers/usb/wusbcore/rh.c
deleted file mode 100644
index 20c08cd9dcbf..000000000000
--- a/drivers/usb/wusbcore/rh.c
+++ /dev/null
@@ -1,426 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * Root Hub operations
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * We fake a root hub that has fake ports (as many as simultaneous
- * devices the Wireless USB Host Controller can deal with). For each
- * port we keep an state in @wusbhc->port[index] identical to the one
- * specified in the USB2.0[ch11] spec and some extra device
- * information that complements the one in 'struct usb_device' (as
- * this lacs a hcpriv pointer).
- *
- * Note this is common to WHCI and HWA host controllers.
- *
- * Through here we enable most of the state changes that the USB stack
- * will use to connect or disconnect devices. We need to do some
- * forced adaptation of Wireless USB device states vs. wired:
- *
- *        USB:                 WUSB:
- *
- * Port   Powered-off          port slot n/a
- *        Powered-on           port slot available
- *        Disconnected         port slot available
- *        Connected            port slot assigned device
- *        		       device sent DN_Connect
- *                             device was authenticated
- *        Enabled              device is authenticated, transitioned
- *                             from unauth -> auth -> default address
- *                             -> enabled
- *        Reset                disconnect
- *        Disable              disconnect
- *
- * This maps the standard USB port states with the WUSB device states
- * so we can fake ports without having to modify the USB stack.
- *
- * FIXME: this process will change in the future
- *
- *
- * ENTRY POINTS
- *
- * Our entry points into here are, as in hcd.c, the USB stack root hub
- * ops defined in the usb_hcd struct:
- *
- * wusbhc_rh_status_data()	Provide hub and port status data bitmap
- *
- * wusbhc_rh_control()          Execution of all the major requests
- *                              you can do to a hub (Set|Clear
- *                              features, get descriptors, status, etc).
- *
- * wusbhc_rh_[suspend|resume]() That
- *
- * wusbhc_rh_start_port_reset() ??? unimplemented
- */
-#include <linux/slab.h>
-#include <linux/export.h>
-#include "wusbhc.h"
-
-/*
- * Reset a fake port
- *
- * Using a Reset Device IE is too heavyweight as it causes the device
- * to enter the UnConnected state and leave the cluster, this can mean
- * that when the device reconnects it is connected to a different fake
- * port.
- *
- * Instead, reset authenticated devices with a SetAddress(0), followed
- * by a SetAddresss(AuthAddr).
- *
- * For unauthenticated devices just pretend to reset but do nothing.
- * If the device initialization continues to fail it will eventually
- * time out after TrustTimeout and enter the UnConnected state.
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Supposedly we are the only thread accesing @wusbhc->port; in any
- * case, maybe we should move the mutex locking from
- * wusbhc_devconnect_auth() to here.
- *
- * @port_idx refers to the wusbhc's port index, not the USB port number
- */
-static int wusbhc_rh_port_reset(struct wusbhc *wusbhc, u8 port_idx)
-{
-	int result = 0;
-	struct wusb_port *port = wusb_port_by_idx(wusbhc, port_idx);
-	struct wusb_dev *wusb_dev = port->wusb_dev;
-
-	if (wusb_dev == NULL)
-		return -ENOTCONN;
-
-	port->status |= USB_PORT_STAT_RESET;
-	port->change |= USB_PORT_STAT_C_RESET;
-
-	if (wusb_dev->addr & WUSB_DEV_ADDR_UNAUTH)
-		result = 0;
-	else
-		result = wusb_dev_update_address(wusbhc, wusb_dev);
-
-	port->status &= ~USB_PORT_STAT_RESET;
-	port->status |= USB_PORT_STAT_ENABLE;
-	port->change |= USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_ENABLE;	
-
-	return result;
-}
-
-/*
- * Return the hub change status bitmap
- *
- * The bits in the change status bitmap are cleared when a
- * ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4].
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * WARNING!! This gets called from atomic context; we cannot get the
- *           mutex--the only race condition we can find is some bit
- *           changing just after we copy it, which shouldn't be too
- *           big of a problem [and we can't make it an spinlock
- *           because other parts need to take it and sleep] .
- *
- *           @usb_hcd is refcounted, so it won't disappear under us
- *           and before killing a host, the polling of the root hub
- *           would be stopped anyway.
- */
-int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	size_t cnt, size, bits_set = 0;
-
-	/* WE DON'T LOCK, see comment */
-	/* round up to bytes.  Hub bit is bit 0 so add 1. */
-	size = DIV_ROUND_UP(wusbhc->ports_max + 1, 8);
-
-	/* clear the output buffer. */
-	memset(_buf, 0, size);
-	/* set the bit for each changed port. */
-	for (cnt = 0; cnt < wusbhc->ports_max; cnt++) {
-
-		if (wusb_port_by_idx(wusbhc, cnt)->change) {
-			const int bitpos = cnt+1;
-
-			_buf[bitpos/8] |= (1 << (bitpos % 8));
-			bits_set++;
-		}
-	}
-
-	return bits_set ? size : 0;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_status_data);
-
-/*
- * Return the hub's descriptor
- *
- * NOTE: almost cut and paste from ehci-hub.c
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked
- */
-static int wusbhc_rh_get_hub_descr(struct wusbhc *wusbhc, u16 wValue,
-				   u16 wIndex,
-				   struct usb_hub_descriptor *descr,
-				   u16 wLength)
-{
-	u16 temp = 1 + (wusbhc->ports_max / 8);
-	u8 length = 7 + 2 * temp;
-
-	if (wLength < length)
-		return -ENOSPC;
-	descr->bDescLength = 7 + 2 * temp;
-	descr->bDescriptorType = USB_DT_HUB; /* HUB type */
-	descr->bNbrPorts = wusbhc->ports_max;
-	descr->wHubCharacteristics = cpu_to_le16(
-		HUB_CHAR_COMMON_LPSM	/* All ports power at once */
-		| 0x00			/* not part of compound device */
-		| HUB_CHAR_NO_OCPM	/* No overcurrent protection */
-		| 0x00			/* 8 FS think time FIXME ?? */
-		| 0x00);		/* No port indicators */
-	descr->bPwrOn2PwrGood = 0;
-	descr->bHubContrCurrent = 0;
-	/* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
-	memset(&descr->u.hs.DeviceRemovable[0], 0, temp);
-	memset(&descr->u.hs.DeviceRemovable[temp], 0xff, temp);
-	return 0;
-}
-
-/*
- * Clear a hub feature
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Nothing to do, so no locking needed ;)
- */
-static int wusbhc_rh_clear_hub_feat(struct wusbhc *wusbhc, u16 feature)
-{
-	int result;
-
-	switch (feature) {
-	case C_HUB_LOCAL_POWER:
-		/* FIXME: maybe plug bit 0 to the power input status,
-		 * if any?
-		 * see wusbhc_rh_get_hub_status() */
-	case C_HUB_OVER_CURRENT:
-		result = 0;
-		break;
-	default:
-		result = -EPIPE;
-	}
-	return result;
-}
-
-/*
- * Return hub status (it is always zero...)
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Nothing to do, so no locking needed ;)
- */
-static int wusbhc_rh_get_hub_status(struct wusbhc *wusbhc, u32 *buf,
-				    u16 wLength)
-{
-	/* FIXME: maybe plug bit 0 to the power input status (if any)? */
-	*buf = 0;
-	return 0;
-}
-
-/*
- * Set a port feature
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_set_port_feat(struct wusbhc *wusbhc, u16 feature,
-				   u8 selector, u8 port_idx)
-{
-	struct device *dev = wusbhc->dev;
-
-	if (port_idx > wusbhc->ports_max)
-		return -EINVAL;
-
-	switch (feature) {
-		/* According to USB2.0[11.24.2.13]p2, these features
-		 * are not required to be implemented. */
-	case USB_PORT_FEAT_C_OVER_CURRENT:
-	case USB_PORT_FEAT_C_ENABLE:
-	case USB_PORT_FEAT_C_SUSPEND:
-	case USB_PORT_FEAT_C_CONNECTION:
-	case USB_PORT_FEAT_C_RESET:
-		return 0;
-	case USB_PORT_FEAT_POWER:
-		/* No such thing, but we fake it works */
-		mutex_lock(&wusbhc->mutex);
-		wusb_port_by_idx(wusbhc, port_idx)->status |= USB_PORT_STAT_POWER;
-		mutex_unlock(&wusbhc->mutex);
-		return 0;
-	case USB_PORT_FEAT_RESET:
-		return wusbhc_rh_port_reset(wusbhc, port_idx);
-	case USB_PORT_FEAT_ENABLE:
-	case USB_PORT_FEAT_SUSPEND:
-		dev_err(dev, "(port_idx %d) set feat %d/%d UNIMPLEMENTED\n",
-			port_idx, feature, selector);
-		return -ENOSYS;
-	default:
-		dev_err(dev, "(port_idx %d) set feat %d/%d UNKNOWN\n",
-			port_idx, feature, selector);
-		return -EPIPE;
-	}
-
-	return 0;
-}
-
-/*
- * Clear a port feature...
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_clear_port_feat(struct wusbhc *wusbhc, u16 feature,
-				     u8 selector, u8 port_idx)
-{
-	int result = 0;
-	struct device *dev = wusbhc->dev;
-
-	if (port_idx > wusbhc->ports_max)
-		return -EINVAL;
-
-	mutex_lock(&wusbhc->mutex);
-	switch (feature) {
-	case USB_PORT_FEAT_POWER:	/* fake port always on */
-		/* According to USB2.0[11.24.2.7.1.4], no need to implement? */
-	case USB_PORT_FEAT_C_OVER_CURRENT:
-		break;
-	case USB_PORT_FEAT_C_RESET:
-		wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_RESET;
-		break;
-	case USB_PORT_FEAT_C_CONNECTION:
-		wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_CONNECTION;
-		break;
-	case USB_PORT_FEAT_ENABLE:
-		__wusbhc_dev_disable(wusbhc, port_idx);
-		break;
-	case USB_PORT_FEAT_C_ENABLE:
-		wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_ENABLE;
-		break;
-	case USB_PORT_FEAT_SUSPEND:
-	case USB_PORT_FEAT_C_SUSPEND:
-		dev_err(dev, "(port_idx %d) Clear feat %d/%d UNIMPLEMENTED\n",
-			port_idx, feature, selector);
-		result = -ENOSYS;
-		break;
-	default:
-		dev_err(dev, "(port_idx %d) Clear feat %d/%d UNKNOWN\n",
-			port_idx, feature, selector);
-		result = -EPIPE;
-		break;
-	}
-	mutex_unlock(&wusbhc->mutex);
-
-	return result;
-}
-
-/*
- * Return the port's status
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_get_port_status(struct wusbhc *wusbhc, u16 port_idx,
-				     u32 *_buf, u16 wLength)
-{
-	__le16 *buf = (__le16 *)_buf;
-
-	if (port_idx > wusbhc->ports_max)
-		return -EINVAL;
-
-	mutex_lock(&wusbhc->mutex);
-	buf[0] = cpu_to_le16(wusb_port_by_idx(wusbhc, port_idx)->status);
-	buf[1] = cpu_to_le16(wusb_port_by_idx(wusbhc, port_idx)->change);
-	mutex_unlock(&wusbhc->mutex);
-
-	return 0;
-}
-
-/*
- * Entry point for Root Hub operations
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-int wusbhc_rh_control(struct usb_hcd *usb_hcd, u16 reqntype, u16 wValue,
-		      u16 wIndex, char *buf, u16 wLength)
-{
-	int result = -ENOSYS;
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-
-	switch (reqntype) {
-	case GetHubDescriptor:
-		result = wusbhc_rh_get_hub_descr(
-			wusbhc, wValue, wIndex,
-			(struct usb_hub_descriptor *) buf, wLength);
-		break;
-	case ClearHubFeature:
-		result = wusbhc_rh_clear_hub_feat(wusbhc, wValue);
-		break;
-	case GetHubStatus:
-		result = wusbhc_rh_get_hub_status(wusbhc, (u32 *)buf, wLength);
-		break;
-
-	case SetPortFeature:
-		result = wusbhc_rh_set_port_feat(wusbhc, wValue, wIndex >> 8,
-						 (wIndex & 0xff) - 1);
-		break;
-	case ClearPortFeature:
-		result = wusbhc_rh_clear_port_feat(wusbhc, wValue, wIndex >> 8,
-						   (wIndex & 0xff) - 1);
-		break;
-	case GetPortStatus:
-		result = wusbhc_rh_get_port_status(wusbhc, wIndex - 1,
-						   (u32 *)buf, wLength);
-		break;
-
-	case SetHubFeature:
-	default:
-		dev_err(wusbhc->dev, "%s (%p [%p], %x, %x, %x, %p, %x) "
-			"UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc, reqntype,
-			wValue, wIndex, buf, wLength);
-		/* dump_stack(); */
-		result = -ENOSYS;
-	}
-	return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_control);
-
-int wusbhc_rh_start_port_reset(struct usb_hcd *usb_hcd, unsigned port_idx)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	dev_err(wusbhc->dev, "%s (%p [%p], port_idx %u) UNIMPLEMENTED\n",
-		__func__, usb_hcd, wusbhc, port_idx);
-	WARN_ON(1);
-	return -ENOSYS;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_start_port_reset);
-
-static void wusb_port_init(struct wusb_port *port)
-{
-	port->status |= USB_PORT_STAT_HIGH_SPEED;
-}
-
-/*
- * Alloc fake port specific fields and status.
- */
-int wusbhc_rh_create(struct wusbhc *wusbhc)
-{
-	int result = -ENOMEM;
-	size_t port_size, itr;
-	port_size = wusbhc->ports_max * sizeof(wusbhc->port[0]);
-	wusbhc->port = kzalloc(port_size, GFP_KERNEL);
-	if (wusbhc->port == NULL)
-		goto error_port_alloc;
-	for (itr = 0; itr < wusbhc->ports_max; itr++)
-		wusb_port_init(&wusbhc->port[itr]);
-	result = 0;
-error_port_alloc:
-	return result;
-}
-
-void wusbhc_rh_destroy(struct wusbhc *wusbhc)
-{
-	kfree(wusbhc->port);
-}
diff --git a/drivers/usb/wusbcore/security.c b/drivers/usb/wusbcore/security.c
deleted file mode 100644
index 14ac8c98ac9e..000000000000
--- a/drivers/usb/wusbcore/security.c
+++ /dev/null
@@ -1,599 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * Security support: encryption enablement, etc
- *
- * Copyright (C) 2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * FIXME: docs
- */
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/usb/ch9.h>
-#include <linux/random.h>
-#include <linux/export.h>
-#include "wusbhc.h"
-#include <asm/unaligned.h>
-
-static void wusbhc_gtk_rekey_work(struct work_struct *work);
-
-int wusbhc_sec_create(struct wusbhc *wusbhc)
-{
-	/*
-	 * WQ is singlethread because we need to serialize rekey operations.
-	 * Use a separate workqueue for security operations instead of the
-	 * wusbd workqueue because security operations may need to communicate
-	 * directly with downstream wireless devices using synchronous URBs.
-	 * If a device is not responding, this could block other host
-	 * controller operations.
-	 */
-	wusbhc->wq_security = create_singlethread_workqueue("wusbd_security");
-	if (wusbhc->wq_security == NULL) {
-		pr_err("WUSB-core: Cannot create wusbd_security workqueue\n");
-		return -ENOMEM;
-	}
-
-	wusbhc->gtk.descr.bLength = sizeof(wusbhc->gtk.descr) +
-		sizeof(wusbhc->gtk.data);
-	wusbhc->gtk.descr.bDescriptorType = USB_DT_KEY;
-	wusbhc->gtk.descr.bReserved = 0;
-	wusbhc->gtk_index = 0;
-
-	INIT_WORK(&wusbhc->gtk_rekey_work, wusbhc_gtk_rekey_work);
-
-	return 0;
-}
-
-
-/* Called when the HC is destroyed */
-void wusbhc_sec_destroy(struct wusbhc *wusbhc)
-{
-	destroy_workqueue(wusbhc->wq_security);
-}
-
-
-/**
- * wusbhc_next_tkid - generate a new, currently unused, TKID
- * @wusbhc:   the WUSB host controller
- * @wusb_dev: the device whose PTK the TKID is for
- *            (or NULL for a TKID for a GTK)
- *
- * The generated TKID consists of two parts: the device's authenticated
- * address (or 0 or a GTK); and an incrementing number.  This ensures
- * that TKIDs cannot be shared between devices and by the time the
- * incrementing number wraps around the older TKIDs will no longer be
- * in use (a maximum of two keys may be active at any one time).
- */
-static u32 wusbhc_next_tkid(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	u32 *tkid;
-	u32 addr;
-
-	if (wusb_dev == NULL) {
-		tkid = &wusbhc->gtk_tkid;
-		addr = 0;
-	} else {
-		tkid = &wusb_port_by_idx(wusbhc, wusb_dev->port_idx)->ptk_tkid;
-		addr = wusb_dev->addr & 0x7f;
-	}
-
-	*tkid = (addr << 8) | ((*tkid + 1) & 0xff);
-
-	return *tkid;
-}
-
-static void wusbhc_generate_gtk(struct wusbhc *wusbhc)
-{
-	const size_t key_size = sizeof(wusbhc->gtk.data);
-	u32 tkid;
-
-	tkid = wusbhc_next_tkid(wusbhc, NULL);
-
-	wusbhc->gtk.descr.tTKID[0] = (tkid >>  0) & 0xff;
-	wusbhc->gtk.descr.tTKID[1] = (tkid >>  8) & 0xff;
-	wusbhc->gtk.descr.tTKID[2] = (tkid >> 16) & 0xff;
-
-	get_random_bytes(wusbhc->gtk.descr.bKeyData, key_size);
-}
-
-/**
- * wusbhc_sec_start - start the security management process
- * @wusbhc: the WUSB host controller
- *
- * Generate and set an initial GTK on the host controller.
- *
- * Called when the HC is started.
- */
-int wusbhc_sec_start(struct wusbhc *wusbhc)
-{
-	const size_t key_size = sizeof(wusbhc->gtk.data);
-	int result;
-
-	wusbhc_generate_gtk(wusbhc);
-
-	result = wusbhc->set_gtk(wusbhc, wusbhc->gtk_tkid,
-				&wusbhc->gtk.descr.bKeyData, key_size);
-	if (result < 0)
-		dev_err(wusbhc->dev, "cannot set GTK for the host: %d\n",
-			result);
-
-	return result;
-}
-
-/**
- * wusbhc_sec_stop - stop the security management process
- * @wusbhc: the WUSB host controller
- *
- * Wait for any pending GTK rekeys to stop.
- */
-void wusbhc_sec_stop(struct wusbhc *wusbhc)
-{
-	cancel_work_sync(&wusbhc->gtk_rekey_work);
-}
-
-
-/** @returns encryption type name */
-const char *wusb_et_name(u8 x)
-{
-	switch (x) {
-	case USB_ENC_TYPE_UNSECURE:	return "unsecure";
-	case USB_ENC_TYPE_WIRED:	return "wired";
-	case USB_ENC_TYPE_CCM_1:	return "CCM-1";
-	case USB_ENC_TYPE_RSA_1:	return "RSA-1";
-	default:			return "unknown";
-	}
-}
-EXPORT_SYMBOL_GPL(wusb_et_name);
-
-/*
- * Set the device encryption method
- *
- * We tell the device which encryption method to use; we do this when
- * setting up the device's security.
- */
-static int wusb_dev_set_encryption(struct usb_device *usb_dev, int value)
-{
-	int result;
-	struct device *dev = &usb_dev->dev;
-	struct wusb_dev *wusb_dev = usb_dev->wusb_dev;
-
-	if (value) {
-		value = wusb_dev->ccm1_etd.bEncryptionValue;
-	} else {
-		/* FIXME: should be wusb_dev->etd[UNSECURE].bEncryptionValue */
-		value = 0;
-	}
-	/* Set device's */
-	result = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
-			USB_REQ_SET_ENCRYPTION,
-			USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-			value, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0)
-		dev_err(dev, "Can't set device's WUSB encryption to "
-			"%s (value %d): %d\n",
-			wusb_et_name(wusb_dev->ccm1_etd.bEncryptionType),
-			wusb_dev->ccm1_etd.bEncryptionValue,  result);
-	return result;
-}
-
-/*
- * Set the GTK to be used by a device.
- *
- * The device must be authenticated.
- */
-static int wusb_dev_set_gtk(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	struct usb_device *usb_dev = wusb_dev->usb_dev;
-	u8 key_index = wusb_key_index(wusbhc->gtk_index,
-		WUSB_KEY_INDEX_TYPE_GTK, WUSB_KEY_INDEX_ORIGINATOR_HOST);
-
-	return usb_control_msg(
-		usb_dev, usb_sndctrlpipe(usb_dev, 0),
-		USB_REQ_SET_DESCRIPTOR,
-		USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-		USB_DT_KEY << 8 | key_index, 0,
-		&wusbhc->gtk.descr, wusbhc->gtk.descr.bLength,
-		USB_CTRL_SET_TIMEOUT);
-}
-
-
-/* FIXME: prototype for adding security */
-int wusb_dev_sec_add(struct wusbhc *wusbhc,
-		     struct usb_device *usb_dev, struct wusb_dev *wusb_dev)
-{
-	int result, bytes, secd_size;
-	struct device *dev = &usb_dev->dev;
-	struct usb_security_descriptor *secd, *new_secd;
-	const struct usb_encryption_descriptor *etd, *ccm1_etd = NULL;
-	const void *itr, *top;
-	char buf[64];
-
-	secd = kmalloc(sizeof(*secd), GFP_KERNEL);
-	if (secd == NULL) {
-		result = -ENOMEM;
-		goto out;
-	}
-
-	result = usb_get_descriptor(usb_dev, USB_DT_SECURITY,
-				    0, secd, sizeof(*secd));
-	if (result < (int)sizeof(*secd)) {
-		dev_err(dev, "Can't read security descriptor or "
-			"not enough data: %d\n", result);
-		goto out;
-	}
-	secd_size = le16_to_cpu(secd->wTotalLength);
-	new_secd = krealloc(secd, secd_size, GFP_KERNEL);
-	if (new_secd == NULL) {
-		dev_err(dev,
-			"Can't allocate space for security descriptors\n");
-		result = -ENOMEM;
-		goto out;
-	}
-	secd = new_secd;
-	result = usb_get_descriptor(usb_dev, USB_DT_SECURITY,
-				    0, secd, secd_size);
-	if (result < secd_size) {
-		dev_err(dev, "Can't read security descriptor or "
-			"not enough data: %d\n", result);
-		goto out;
-	}
-	bytes = 0;
-	itr = &secd[1];
-	top = (void *)secd + result;
-	while (itr < top) {
-		etd = itr;
-		if (top - itr < sizeof(*etd)) {
-			dev_err(dev, "BUG: bad device security descriptor; "
-				"not enough data (%zu vs %zu bytes left)\n",
-				top - itr, sizeof(*etd));
-			break;
-		}
-		if (etd->bLength < sizeof(*etd)) {
-			dev_err(dev, "BUG: bad device encryption descriptor; "
-				"descriptor is too short "
-				"(%u vs %zu needed)\n",
-				etd->bLength, sizeof(*etd));
-			break;
-		}
-		itr += etd->bLength;
-		bytes += snprintf(buf + bytes, sizeof(buf) - bytes,
-				  "%s (0x%02x/%02x) ",
-				  wusb_et_name(etd->bEncryptionType),
-				  etd->bEncryptionValue, etd->bAuthKeyIndex);
-		if (etd->bEncryptionType == USB_ENC_TYPE_CCM_1)
-			ccm1_etd = etd;
-	}
-	/* This code only supports CCM1 as of now. */
-	/* FIXME: user has to choose which sec mode to use?
-	 * In theory we want CCM */
-	if (ccm1_etd == NULL) {
-		dev_err(dev, "WUSB device doesn't support CCM1 encryption, "
-			"can't use!\n");
-		result = -EINVAL;
-		goto out;
-	}
-	wusb_dev->ccm1_etd = *ccm1_etd;
-	dev_dbg(dev, "supported encryption: %s; using %s (0x%02x/%02x)\n",
-		buf, wusb_et_name(ccm1_etd->bEncryptionType),
-		ccm1_etd->bEncryptionValue, ccm1_etd->bAuthKeyIndex);
-	result = 0;
-out:
-	kfree(secd);
-	return result;
-}
-
-void wusb_dev_sec_rm(struct wusb_dev *wusb_dev)
-{
-	/* Nothing so far */
-}
-
-/**
- * Update the address of an unauthenticated WUSB device
- *
- * Once we have successfully authenticated, we take it to addr0 state
- * and then to a normal address.
- *
- * Before the device's address (as known by it) was usb_dev->devnum |
- * 0x80 (unauthenticated address). With this we update it to usb_dev->devnum.
- */
-int wusb_dev_update_address(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
-{
-	int result = -ENOMEM;
-	struct usb_device *usb_dev = wusb_dev->usb_dev;
-	struct device *dev = &usb_dev->dev;
-	u8 new_address = wusb_dev->addr & 0x7F;
-
-	/* Set address 0 */
-	result = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
-			USB_REQ_SET_ADDRESS,
-			USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-			 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "auth failed: can't set address 0: %d\n",
-			result);
-		goto error_addr0;
-	}
-	result = wusb_set_dev_addr(wusbhc, wusb_dev, 0);
-	if (result < 0)
-		goto error_addr0;
-	usb_set_device_state(usb_dev, USB_STATE_DEFAULT);
-	usb_ep0_reinit(usb_dev);
-
-	/* Set new (authenticated) address. */
-	result = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
-			USB_REQ_SET_ADDRESS,
-			USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-			new_address, 0, NULL, 0,
-			USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "auth failed: can't set address %u: %d\n",
-			new_address, result);
-		goto error_addr;
-	}
-	result = wusb_set_dev_addr(wusbhc, wusb_dev, new_address);
-	if (result < 0)
-		goto error_addr;
-	usb_set_device_state(usb_dev, USB_STATE_ADDRESS);
-	usb_ep0_reinit(usb_dev);
-	usb_dev->authenticated = 1;
-error_addr:
-error_addr0:
-	return result;
-}
-
-/*
- *
- *
- */
-/* FIXME: split and cleanup */
-int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
-			    struct wusb_ckhdid *ck)
-{
-	int result = -ENOMEM;
-	struct usb_device *usb_dev = wusb_dev->usb_dev;
-	struct device *dev = &usb_dev->dev;
-	u32 tkid;
-	struct usb_handshake *hs;
-	struct aes_ccm_nonce ccm_n;
-	u8 mic[8];
-	struct wusb_keydvt_in keydvt_in;
-	struct wusb_keydvt_out keydvt_out;
-
-	hs = kcalloc(3, sizeof(hs[0]), GFP_KERNEL);
-	if (!hs)
-		goto error_kzalloc;
-
-	/* We need to turn encryption before beginning the 4way
-	 * hshake (WUSB1.0[.3.2.2]) */
-	result = wusb_dev_set_encryption(usb_dev, 1);
-	if (result < 0)
-		goto error_dev_set_encryption;
-
-	tkid = wusbhc_next_tkid(wusbhc, wusb_dev);
-
-	hs[0].bMessageNumber = 1;
-	hs[0].bStatus = 0;
-	put_unaligned_le32(tkid, hs[0].tTKID);
-	hs[0].bReserved = 0;
-	memcpy(hs[0].CDID, &wusb_dev->cdid, sizeof(hs[0].CDID));
-	get_random_bytes(&hs[0].nonce, sizeof(hs[0].nonce));
-	memset(hs[0].MIC, 0, sizeof(hs[0].MIC)); /* Per WUSB1.0[T7-22] */
-
-	result = usb_control_msg(
-		usb_dev, usb_sndctrlpipe(usb_dev, 0),
-		USB_REQ_SET_HANDSHAKE,
-		USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-		1, 0, &hs[0], sizeof(hs[0]), USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Handshake1: request failed: %d\n", result);
-		goto error_hs1;
-	}
-
-	/* Handshake 2, from the device -- need to verify fields */
-	result = usb_control_msg(
-		usb_dev, usb_rcvctrlpipe(usb_dev, 0),
-		USB_REQ_GET_HANDSHAKE,
-		USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-		2, 0, &hs[1], sizeof(hs[1]), USB_CTRL_GET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Handshake2: request failed: %d\n", result);
-		goto error_hs2;
-	}
-
-	result = -EINVAL;
-	if (hs[1].bMessageNumber != 2) {
-		dev_err(dev, "Handshake2 failed: bad message number %u\n",
-			hs[1].bMessageNumber);
-		goto error_hs2;
-	}
-	if (hs[1].bStatus != 0) {
-		dev_err(dev, "Handshake2 failed: bad status %u\n",
-			hs[1].bStatus);
-		goto error_hs2;
-	}
-	if (memcmp(hs[0].tTKID, hs[1].tTKID, sizeof(hs[0].tTKID))) {
-		dev_err(dev, "Handshake2 failed: TKID mismatch "
-			"(#1 0x%02x%02x%02x vs #2 0x%02x%02x%02x)\n",
-			hs[0].tTKID[0], hs[0].tTKID[1], hs[0].tTKID[2],
-			hs[1].tTKID[0], hs[1].tTKID[1], hs[1].tTKID[2]);
-		goto error_hs2;
-	}
-	if (memcmp(hs[0].CDID, hs[1].CDID, sizeof(hs[0].CDID))) {
-		dev_err(dev, "Handshake2 failed: CDID mismatch\n");
-		goto error_hs2;
-	}
-
-	/* Setup the CCM nonce */
-	memset(&ccm_n.sfn, 0, sizeof(ccm_n.sfn)); /* Per WUSB1.0[6.5.2] */
-	put_unaligned_le32(tkid, ccm_n.tkid);
-	ccm_n.src_addr = wusbhc->uwb_rc->uwb_dev.dev_addr;
-	ccm_n.dest_addr.data[0] = wusb_dev->addr;
-	ccm_n.dest_addr.data[1] = 0;
-
-	/* Derive the KCK and PTK from CK, the CCM, H and D nonces */
-	memcpy(keydvt_in.hnonce, hs[0].nonce, sizeof(keydvt_in.hnonce));
-	memcpy(keydvt_in.dnonce, hs[1].nonce, sizeof(keydvt_in.dnonce));
-	result = wusb_key_derive(&keydvt_out, ck->data, &ccm_n, &keydvt_in);
-	if (result < 0) {
-		dev_err(dev, "Handshake2 failed: cannot derive keys: %d\n",
-			result);
-		goto error_hs2;
-	}
-
-	/* Compute MIC and verify it */
-	result = wusb_oob_mic(mic, keydvt_out.kck, &ccm_n, &hs[1]);
-	if (result < 0) {
-		dev_err(dev, "Handshake2 failed: cannot compute MIC: %d\n",
-			result);
-		goto error_hs2;
-	}
-
-	if (memcmp(hs[1].MIC, mic, sizeof(hs[1].MIC))) {
-		dev_err(dev, "Handshake2 failed: MIC mismatch\n");
-		goto error_hs2;
-	}
-
-	/* Send Handshake3 */
-	hs[2].bMessageNumber = 3;
-	hs[2].bStatus = 0;
-	put_unaligned_le32(tkid, hs[2].tTKID);
-	hs[2].bReserved = 0;
-	memcpy(hs[2].CDID, &wusb_dev->cdid, sizeof(hs[2].CDID));
-	memcpy(hs[2].nonce, hs[0].nonce, sizeof(hs[2].nonce));
-	result = wusb_oob_mic(hs[2].MIC, keydvt_out.kck, &ccm_n, &hs[2]);
-	if (result < 0) {
-		dev_err(dev, "Handshake3 failed: cannot compute MIC: %d\n",
-			result);
-		goto error_hs2;
-	}
-
-	result = usb_control_msg(
-		usb_dev, usb_sndctrlpipe(usb_dev, 0),
-		USB_REQ_SET_HANDSHAKE,
-		USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
-		3, 0, &hs[2], sizeof(hs[2]), USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "Handshake3: request failed: %d\n", result);
-		goto error_hs3;
-	}
-
-	result = wusbhc->set_ptk(wusbhc, wusb_dev->port_idx, tkid,
-				 keydvt_out.ptk, sizeof(keydvt_out.ptk));
-	if (result < 0)
-		goto error_wusbhc_set_ptk;
-
-	result = wusb_dev_set_gtk(wusbhc, wusb_dev);
-	if (result < 0) {
-		dev_err(dev, "Set GTK for device: request failed: %d\n",
-			result);
-		goto error_wusbhc_set_gtk;
-	}
-
-	/* Update the device's address from unauth to auth */
-	if (usb_dev->authenticated == 0) {
-		result = wusb_dev_update_address(wusbhc, wusb_dev);
-		if (result < 0)
-			goto error_dev_update_address;
-	}
-	result = 0;
-	dev_info(dev, "device authenticated\n");
-
-error_dev_update_address:
-error_wusbhc_set_gtk:
-error_wusbhc_set_ptk:
-error_hs3:
-error_hs2:
-error_hs1:
-	memset(hs, 0, 3*sizeof(hs[0]));
-	memzero_explicit(&keydvt_out, sizeof(keydvt_out));
-	memzero_explicit(&keydvt_in, sizeof(keydvt_in));
-	memzero_explicit(&ccm_n, sizeof(ccm_n));
-	memzero_explicit(mic, sizeof(mic));
-	if (result < 0)
-		wusb_dev_set_encryption(usb_dev, 0);
-error_dev_set_encryption:
-	kfree(hs);
-error_kzalloc:
-	return result;
-}
-
-/*
- * Once all connected and authenticated devices have received the new
- * GTK, switch the host to using it.
- */
-static void wusbhc_gtk_rekey_work(struct work_struct *work)
-{
-	struct wusbhc *wusbhc = container_of(work,
-					struct wusbhc, gtk_rekey_work);
-	size_t key_size = sizeof(wusbhc->gtk.data);
-	int port_idx;
-	struct wusb_dev *wusb_dev, *wusb_dev_next;
-	LIST_HEAD(rekey_list);
-
-	mutex_lock(&wusbhc->mutex);
-	/* generate the new key */
-	wusbhc_generate_gtk(wusbhc);
-	/* roll the gtk index. */
-	wusbhc->gtk_index = (wusbhc->gtk_index + 1) % (WUSB_KEY_INDEX_MAX + 1);
-	/*
-	 * Save all connected devices on a list while holding wusbhc->mutex and
-	 * take a reference to each one.  Then submit the set key request to
-	 * them after releasing the lock in order to avoid a deadlock.
-	 */
-	for (port_idx = 0; port_idx < wusbhc->ports_max; port_idx++) {
-		wusb_dev = wusbhc->port[port_idx].wusb_dev;
-		if (!wusb_dev || !wusb_dev->usb_dev
-			|| !wusb_dev->usb_dev->authenticated)
-			continue;
-
-		wusb_dev_get(wusb_dev);
-		list_add_tail(&wusb_dev->rekey_node, &rekey_list);
-	}
-	mutex_unlock(&wusbhc->mutex);
-
-	/* Submit the rekey requests without holding wusbhc->mutex. */
-	list_for_each_entry_safe(wusb_dev, wusb_dev_next, &rekey_list,
-		rekey_node) {
-		list_del_init(&wusb_dev->rekey_node);
-		dev_dbg(&wusb_dev->usb_dev->dev,
-			"%s: rekey device at port %d\n",
-			__func__, wusb_dev->port_idx);
-
-		if (wusb_dev_set_gtk(wusbhc, wusb_dev) < 0) {
-			dev_err(&wusb_dev->usb_dev->dev,
-				"%s: rekey device at port %d failed\n",
-				__func__, wusb_dev->port_idx);
-		}
-		wusb_dev_put(wusb_dev);
-	}
-
-	/* Switch the host controller to use the new GTK. */
-	mutex_lock(&wusbhc->mutex);
-	wusbhc->set_gtk(wusbhc, wusbhc->gtk_tkid,
-		&wusbhc->gtk.descr.bKeyData, key_size);
-	mutex_unlock(&wusbhc->mutex);
-}
-
-/**
- * wusbhc_gtk_rekey - generate and distribute a new GTK
- * @wusbhc: the WUSB host controller
- *
- * Generate a new GTK and distribute it to all connected and
- * authenticated devices.  When all devices have the new GTK, the host
- * starts using it.
- *
- * This must be called after every device disconnect (see [WUSB]
- * section 6.2.11.2).
- */
-void wusbhc_gtk_rekey(struct wusbhc *wusbhc)
-{
-	/*
-	 * We need to submit a URB to the downstream WUSB devices in order to
-	 * change the group key.  This can't be done while holding the
-	 * wusbhc->mutex since that is also taken in the urb_enqueue routine
-	 * and will cause a deadlock.  Instead, queue a work item to do
-	 * it when the lock is not held
-	 */
-	queue_work(wusbhc->wq_security, &wusbhc->gtk_rekey_work);
-}
diff --git a/drivers/usb/wusbcore/wa-hc.c b/drivers/usb/wusbcore/wa-hc.c
deleted file mode 100644
index 6827075fb8a1..000000000000
--- a/drivers/usb/wusbcore/wa-hc.c
+++ /dev/null
@@ -1,88 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wire Adapter Host Controller Driver
- * Common items to HWA and DWA based HCDs
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * FIXME: docs
- */
-#include <linux/slab.h>
-#include <linux/module.h>
-#include "wusbhc.h"
-#include "wa-hc.h"
-
-/**
- * Assumes
- *
- * wa->usb_dev and wa->usb_iface initialized and refcounted,
- * wa->wa_descr initialized.
- */
-int wa_create(struct wahc *wa, struct usb_interface *iface,
-	kernel_ulong_t quirks)
-{
-	int result;
-	struct device *dev = &iface->dev;
-
-	if (iface->cur_altsetting->desc.bNumEndpoints < 3)
-		return -ENODEV;
-
-	result = wa_rpipes_create(wa);
-	if (result < 0)
-		goto error_rpipes_create;
-	wa->quirks = quirks;
-	/* Fill up Data Transfer EP pointers */
-	wa->dti_epd = &iface->cur_altsetting->endpoint[1].desc;
-	wa->dto_epd = &iface->cur_altsetting->endpoint[2].desc;
-	wa->dti_buf_size = usb_endpoint_maxp(wa->dti_epd);
-	wa->dti_buf = kmalloc(wa->dti_buf_size, GFP_KERNEL);
-	if (wa->dti_buf == NULL) {
-		result = -ENOMEM;
-		goto error_dti_buf_alloc;
-	}
-	result = wa_nep_create(wa, iface);
-	if (result < 0) {
-		dev_err(dev, "WA-CDS: can't initialize notif endpoint: %d\n",
-			result);
-		goto error_nep_create;
-	}
-	return 0;
-
-error_nep_create:
-	kfree(wa->dti_buf);
-error_dti_buf_alloc:
-	wa_rpipes_destroy(wa);
-error_rpipes_create:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wa_create);
-
-
-void __wa_destroy(struct wahc *wa)
-{
-	if (wa->dti_urb) {
-		usb_kill_urb(wa->dti_urb);
-		usb_put_urb(wa->dti_urb);
-	}
-	kfree(wa->dti_buf);
-	wa_nep_destroy(wa);
-	wa_rpipes_destroy(wa);
-}
-EXPORT_SYMBOL_GPL(__wa_destroy);
-
-/**
- * wa_reset_all - reset the WA device
- * @wa: the WA to be reset
- *
- * For HWAs the radio controller and all other PALs are also reset.
- */
-void wa_reset_all(struct wahc *wa)
-{
-	/* FIXME: assuming HWA. */
-	wusbhc_reset_all(wa->wusb);
-}
-
-MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
-MODULE_DESCRIPTION("Wireless USB Wire Adapter core");
-MODULE_LICENSE("GPL");
diff --git a/drivers/usb/wusbcore/wa-hc.h b/drivers/usb/wusbcore/wa-hc.h
deleted file mode 100644
index ec90fff21deb..000000000000
--- a/drivers/usb/wusbcore/wa-hc.h
+++ /dev/null
@@ -1,467 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * HWA Host Controller Driver
- * Wire Adapter Control/Data Streaming Iface (WUSB1.0[8])
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * This driver implements a USB Host Controller (struct usb_hcd) for a
- * Wireless USB Host Controller based on the Wireless USB 1.0
- * Host-Wire-Adapter specification (in layman terms, a USB-dongle that
- * implements a Wireless USB host).
- *
- * Check out the Design-overview.txt file in the source documentation
- * for other details on the implementation.
- *
- * Main blocks:
- *
- *  driver     glue with the driver API, workqueue daemon
- *
- *  lc         RC instance life cycle management (create, destroy...)
- *
- *  hcd        glue with the USB API Host Controller Interface API.
- *
- *  nep        Notification EndPoint management: collect notifications
- *             and queue them with the workqueue daemon.
- *
- *             Handle notifications as coming from the NEP. Sends them
- *             off others to their respective modules (eg: connect,
- *             disconnect and reset go to devconnect).
- *
- *  rpipe      Remote Pipe management; rpipe is what we use to write
- *             to an endpoint on a WUSB device that is connected to a
- *             HWA RC.
- *
- *  xfer       Transfer management -- this is all the code that gets a
- *             buffer and pushes it to a device (or viceversa). *
- *
- * Some day a lot of this code will be shared between this driver and
- * the drivers for DWA (xfer, rpipe).
- *
- * All starts at driver.c:hwahc_probe(), when one of this guys is
- * connected. hwahc_disconnect() stops it.
- *
- * During operation, the main driver is devices connecting or
- * disconnecting. They cause the HWA RC to send notifications into
- * nep.c:hwahc_nep_cb() that will dispatch them to
- * notif.c:wa_notif_dispatch(). From there they will fan to cause
- * device connects, disconnects, etc.
- *
- * Note much of the activity is difficult to follow. For example a
- * device connect goes to devconnect, which will cause the "fake" root
- * hub port to show a connect and stop there. Then hub_wq will notice
- * and call into the rh.c:hwahc_rc_port_reset() code to authenticate
- * the device (and this might require user intervention) and enable
- * the port.
- *
- * We also have a timer workqueue going from devconnect.c that
- * schedules in hwahc_devconnect_create().
- *
- * The rest of the traffic is in the usual entry points of a USB HCD,
- * which are hooked up in driver.c:hwahc_rc_driver, and defined in
- * hcd.c.
- */
-
-#ifndef __HWAHC_INTERNAL_H__
-#define __HWAHC_INTERNAL_H__
-
-#include <linux/completion.h>
-#include <linux/usb.h>
-#include <linux/mutex.h>
-#include <linux/spinlock.h>
-#include <linux/uwb.h>
-#include <linux/usb/wusb.h>
-#include <linux/usb/wusb-wa.h>
-
-struct wusbhc;
-struct wahc;
-extern void wa_urb_enqueue_run(struct work_struct *ws);
-extern void wa_process_errored_transfers_run(struct work_struct *ws);
-
-/**
- * RPipe instance
- *
- * @descr's fields are kept in LE, as we need to send it back and
- * forth.
- *
- * @wa is referenced when set
- *
- * @segs_available is the number of requests segments that still can
- *                 be submitted to the controller without overloading
- *                 it. It is initialized to descr->wRequests when
- *                 aiming.
- *
- * A rpipe supports a max of descr->wRequests at the same time; before
- * submitting seg_lock has to be taken. If segs_avail > 0, then we can
- * submit; if not, we have to queue them.
- */
-struct wa_rpipe {
-	struct kref refcnt;
-	struct usb_rpipe_descriptor descr;
-	struct usb_host_endpoint *ep;
-	struct wahc *wa;
-	spinlock_t seg_lock;
-	struct list_head seg_list;
-	struct list_head list_node;
-	atomic_t segs_available;
-	u8 buffer[1];	/* For reads/writes on USB */
-};
-
-
-enum wa_dti_state {
-	WA_DTI_TRANSFER_RESULT_PENDING,
-	WA_DTI_ISOC_PACKET_STATUS_PENDING,
-	WA_DTI_BUF_IN_DATA_PENDING
-};
-
-enum wa_quirks {
-	/*
-	 * The Alereon HWA expects the data frames in isochronous transfer
-	 * requests to be concatenated and not sent as separate packets.
-	 */
-	WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC	= 0x01,
-	/*
-	 * The Alereon HWA can be instructed to not send transfer notifications
-	 * as an optimization.
-	 */
-	WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS	= 0x02,
-};
-
-enum wa_vendor_specific_requests {
-	WA_REQ_ALEREON_DISABLE_XFER_NOTIFICATIONS = 0x4C,
-	WA_REQ_ALEREON_FEATURE_SET = 0x01,
-	WA_REQ_ALEREON_FEATURE_CLEAR = 0x00,
-};
-
-#define WA_MAX_BUF_IN_URBS	4
-/**
- * Instance of a HWA Host Controller
- *
- * Except where a more specific lock/mutex applies or atomic, all
- * fields protected by @mutex.
- *
- * @wa_descr  Can be accessed without locking because it is in
- *            the same area where the device descriptors were
- *            read, so it is guaranteed to exist unmodified while
- *            the device exists.
- *
- *            Endianess has been converted to CPU's.
- *
- * @nep_* can be accessed without locking as its processing is
- *        serialized; we submit a NEP URB and it comes to
- *        hwahc_nep_cb(), which won't issue another URB until it is
- *        done processing it.
- *
- * @xfer_list:
- *
- *   List of active transfers to verify existence from a xfer id
- *   gotten from the xfer result message. Can't use urb->list because
- *   it goes by endpoint, and we don't know the endpoint at the time
- *   when we get the xfer result message. We can't really rely on the
- *   pointer (will have to change for 64 bits) as the xfer id is 32 bits.
- *
- * @xfer_delayed_list:   List of transfers that need to be started
- *                       (with a workqueue, because they were
- *                       submitted from an atomic context).
- *
- * FIXME: this needs to be layered up: a wusbhc layer (for sharing
- *        commonalities with WHCI), a wa layer (for sharing
- *        commonalities with DWA-RC).
- */
-struct wahc {
-	struct usb_device *usb_dev;
-	struct usb_interface *usb_iface;
-
-	/* HC to deliver notifications */
-	union {
-		struct wusbhc *wusb;
-		struct dwahc *dwa;
-	};
-
-	const struct usb_endpoint_descriptor *dto_epd, *dti_epd;
-	const struct usb_wa_descriptor *wa_descr;
-
-	struct urb *nep_urb;		/* Notification EndPoint [lockless] */
-	struct edc nep_edc;
-	void *nep_buffer;
-	size_t nep_buffer_size;
-
-	atomic_t notifs_queued;
-
-	u16 rpipes;
-	unsigned long *rpipe_bm;	/* rpipe usage bitmap */
-	struct list_head rpipe_delayed_list;	/* delayed RPIPES. */
-	spinlock_t rpipe_lock;	/* protect rpipe_bm and delayed list */
-	struct mutex rpipe_mutex;	/* assigning resources to endpoints */
-
-	/*
-	 * dti_state is used to track the state of the dti_urb. When dti_state
-	 * is WA_DTI_ISOC_PACKET_STATUS_PENDING, dti_isoc_xfer_in_progress and
-	 * dti_isoc_xfer_seg identify which xfer the incoming isoc packet
-	 * status refers to.
-	 */
-	enum wa_dti_state dti_state;
-	u32 dti_isoc_xfer_in_progress;
-	u8  dti_isoc_xfer_seg;
-	struct urb *dti_urb;		/* URB for reading xfer results */
-					/* URBs for reading data in */
-	struct urb buf_in_urbs[WA_MAX_BUF_IN_URBS];
-	int active_buf_in_urbs;		/* number of buf_in_urbs active. */
-	struct edc dti_edc;		/* DTI error density counter */
-	void *dti_buf;
-	size_t dti_buf_size;
-
-	unsigned long dto_in_use;	/* protect dto endoint serialization */
-
-	s32 status;			/* For reading status */
-
-	struct list_head xfer_list;
-	struct list_head xfer_delayed_list;
-	struct list_head xfer_errored_list;
-	/*
-	 * lock for the above xfer lists.  Can be taken while a xfer->lock is
-	 * held but not in the reverse order.
-	 */
-	spinlock_t xfer_list_lock;
-	struct work_struct xfer_enqueue_work;
-	struct work_struct xfer_error_work;
-	atomic_t xfer_id_count;
-
-	kernel_ulong_t	quirks;
-};
-
-
-extern int wa_create(struct wahc *wa, struct usb_interface *iface,
-	kernel_ulong_t);
-extern void __wa_destroy(struct wahc *wa);
-extern int wa_dti_start(struct wahc *wa);
-void wa_reset_all(struct wahc *wa);
-
-
-/* Miscellaneous constants */
-enum {
-	/** Max number of EPROTO errors we tolerate on the NEP in a
-	 * period of time */
-	HWAHC_EPROTO_MAX = 16,
-	/** Period of time for EPROTO errors (in jiffies) */
-	HWAHC_EPROTO_PERIOD = 4 * HZ,
-};
-
-
-/* Notification endpoint handling */
-extern int wa_nep_create(struct wahc *, struct usb_interface *);
-extern void wa_nep_destroy(struct wahc *);
-
-static inline int wa_nep_arm(struct wahc *wa, gfp_t gfp_mask)
-{
-	struct urb *urb = wa->nep_urb;
-	urb->transfer_buffer = wa->nep_buffer;
-	urb->transfer_buffer_length = wa->nep_buffer_size;
-	return usb_submit_urb(urb, gfp_mask);
-}
-
-static inline void wa_nep_disarm(struct wahc *wa)
-{
-	usb_kill_urb(wa->nep_urb);
-}
-
-
-/* RPipes */
-static inline void wa_rpipe_init(struct wahc *wa)
-{
-	INIT_LIST_HEAD(&wa->rpipe_delayed_list);
-	spin_lock_init(&wa->rpipe_lock);
-	mutex_init(&wa->rpipe_mutex);
-}
-
-static inline void wa_init(struct wahc *wa)
-{
-	int index;
-
-	edc_init(&wa->nep_edc);
-	atomic_set(&wa->notifs_queued, 0);
-	wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING;
-	wa_rpipe_init(wa);
-	edc_init(&wa->dti_edc);
-	INIT_LIST_HEAD(&wa->xfer_list);
-	INIT_LIST_HEAD(&wa->xfer_delayed_list);
-	INIT_LIST_HEAD(&wa->xfer_errored_list);
-	spin_lock_init(&wa->xfer_list_lock);
-	INIT_WORK(&wa->xfer_enqueue_work, wa_urb_enqueue_run);
-	INIT_WORK(&wa->xfer_error_work, wa_process_errored_transfers_run);
-	wa->dto_in_use = 0;
-	atomic_set(&wa->xfer_id_count, 1);
-	/* init the buf in URBs */
-	for (index = 0; index < WA_MAX_BUF_IN_URBS; ++index)
-		usb_init_urb(&(wa->buf_in_urbs[index]));
-	wa->active_buf_in_urbs = 0;
-}
-
-/**
- * Destroy a pipe (when refcount drops to zero)
- *
- * Assumes it has been moved to the "QUIESCING" state.
- */
-struct wa_xfer;
-extern void rpipe_destroy(struct kref *_rpipe);
-static inline
-void __rpipe_get(struct wa_rpipe *rpipe)
-{
-	kref_get(&rpipe->refcnt);
-}
-extern int rpipe_get_by_ep(struct wahc *, struct usb_host_endpoint *,
-			   struct urb *, gfp_t);
-static inline void rpipe_put(struct wa_rpipe *rpipe)
-{
-	kref_put(&rpipe->refcnt, rpipe_destroy);
-
-}
-extern void rpipe_ep_disable(struct wahc *, struct usb_host_endpoint *);
-extern void rpipe_clear_feature_stalled(struct wahc *,
-			struct usb_host_endpoint *);
-extern int wa_rpipes_create(struct wahc *);
-extern void wa_rpipes_destroy(struct wahc *);
-static inline void rpipe_avail_dec(struct wa_rpipe *rpipe)
-{
-	atomic_dec(&rpipe->segs_available);
-}
-
-/**
- * Returns true if the rpipe is ready to submit more segments.
- */
-static inline int rpipe_avail_inc(struct wa_rpipe *rpipe)
-{
-	return atomic_inc_return(&rpipe->segs_available) > 0
-		&& !list_empty(&rpipe->seg_list);
-}
-
-
-/* Transferring data */
-extern int wa_urb_enqueue(struct wahc *, struct usb_host_endpoint *,
-			  struct urb *, gfp_t);
-extern int wa_urb_dequeue(struct wahc *, struct urb *, int);
-extern void wa_handle_notif_xfer(struct wahc *, struct wa_notif_hdr *);
-
-
-/* Misc
- *
- * FIXME: Refcounting for the actual @hwahc object is not correct; I
- *        mean, this should be refcounting on the HCD underneath, but
- *        it is not. In any case, the semantics for HCD refcounting
- *        are *weird*...on refcount reaching zero it just frees
- *        it...no RC specific function is called...unless I miss
- *        something.
- *
- * FIXME: has to go away in favour of a 'struct' hcd based solution
- */
-static inline struct wahc *wa_get(struct wahc *wa)
-{
-	usb_get_intf(wa->usb_iface);
-	return wa;
-}
-
-static inline void wa_put(struct wahc *wa)
-{
-	usb_put_intf(wa->usb_iface);
-}
-
-
-static inline int __wa_feature(struct wahc *wa, unsigned op, u16 feature)
-{
-	return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			op ? USB_REQ_SET_FEATURE : USB_REQ_CLEAR_FEATURE,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			feature,
-			wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-}
-
-
-static inline int __wa_set_feature(struct wahc *wa, u16 feature)
-{
-	return  __wa_feature(wa, 1, feature);
-}
-
-
-static inline int __wa_clear_feature(struct wahc *wa, u16 feature)
-{
-	return __wa_feature(wa, 0, feature);
-}
-
-
-/**
- * Return the status of a Wire Adapter
- *
- * @wa:		Wire Adapter instance
- * @returns     < 0 errno code on error, or status bitmap as described
- *              in WUSB1.0[8.3.1.6].
- *
- * NOTE: need malloc, some arches don't take USB from the stack
- */
-static inline
-s32 __wa_get_status(struct wahc *wa)
-{
-	s32 result;
-	result = usb_control_msg(
-		wa->usb_dev, usb_rcvctrlpipe(wa->usb_dev, 0),
-		USB_REQ_GET_STATUS,
-		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-		&wa->status, sizeof(wa->status), USB_CTRL_GET_TIMEOUT);
-	if (result >= 0)
-		result = wa->status;
-	return result;
-}
-
-
-/**
- * Waits until the Wire Adapter's status matches @mask/@value
- *
- * @wa:		Wire Adapter instance.
- * @returns     < 0 errno code on error, otherwise status.
- *
- * Loop until the WAs status matches the mask and value (status & mask
- * == value). Timeout if it doesn't happen.
- *
- * FIXME: is there an official specification on how long status
- *        changes can take?
- */
-static inline s32 __wa_wait_status(struct wahc *wa, u32 mask, u32 value)
-{
-	s32 result;
-	unsigned loops = 10;
-	do {
-		msleep(50);
-		result = __wa_get_status(wa);
-		if ((result & mask) == value)
-			break;
-		if (loops-- == 0) {
-			result = -ETIMEDOUT;
-			break;
-		}
-	} while (result >= 0);
-	return result;
-}
-
-
-/** Command @hwahc to stop, @returns 0 if ok, < 0 errno code on error */
-static inline int __wa_stop(struct wahc *wa)
-{
-	int result;
-	struct device *dev = &wa->usb_iface->dev;
-
-	result = __wa_clear_feature(wa, WA_ENABLE);
-	if (result < 0 && result != -ENODEV) {
-		dev_err(dev, "error commanding HC to stop: %d\n", result);
-		goto out;
-	}
-	result = __wa_wait_status(wa, WA_ENABLE, 0);
-	if (result < 0 && result != -ENODEV)
-		dev_err(dev, "error waiting for HC to stop: %d\n", result);
-out:
-	return 0;
-}
-
-
-#endif /* #ifndef __HWAHC_INTERNAL_H__ */
diff --git a/drivers/usb/wusbcore/wa-nep.c b/drivers/usb/wusbcore/wa-nep.c
deleted file mode 100644
index 5f0656db5482..000000000000
--- a/drivers/usb/wusbcore/wa-nep.c
+++ /dev/null
@@ -1,289 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB Wire Adapter: Control/Data Streaming Interface (WUSB[8])
- * Notification EndPoint support
- *
- * Copyright (C) 2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * This part takes care of getting the notification from the hw
- * only and dispatching through wusbwad into
- * wa_notif_dispatch. Handling is done there.
- *
- * WA notifications are limited in size; most of them are three or
- * four bytes long, and the longest is the HWA Device Notification,
- * which would not exceed 38 bytes (DNs are limited in payload to 32
- * bytes plus 3 bytes header (WUSB1.0[7.6p2]), plus 3 bytes HWA
- * header (WUSB1.0[8.5.4.2]).
- *
- * It is not clear if more than one Device Notification can be packed
- * in a HWA Notification, I assume no because of the wording in
- * WUSB1.0[8.5.4.2]. In any case, the bigger any notification could
- * get is 256 bytes (as the bLength field is a byte).
- *
- * So what we do is we have this buffer and read into it; when a
- * notification arrives we schedule work to a specific, single thread
- * workqueue (so notifications are serialized) and copy the
- * notification data. After scheduling the work, we rearm the read from
- * the notification endpoint.
- *
- * Entry points here are:
- *
- * wa_nep_[create|destroy]()   To initialize/release this subsystem
- *
- * wa_nep_cb()                 Callback for the notification
- *                                endpoint; when data is ready, this
- *                                does the dispatching.
- */
-#include <linux/workqueue.h>
-#include <linux/ctype.h>
-#include <linux/slab.h>
-
-#include "wa-hc.h"
-#include "wusbhc.h"
-
-/* Structure for queueing notifications to the workqueue */
-struct wa_notif_work {
-	struct work_struct work;
-	struct wahc *wa;
-	size_t size;
-	u8 data[];
-};
-
-/*
- * Process incoming notifications from the WA's Notification EndPoint
- * [the wuswad daemon, basically]
- *
- * @_nw:	Pointer to a descriptor which has the pointer to the
- *		@wa, the size of the buffer and the work queue
- *		structure (so we can free all when done).
- * @returns     0 if ok, < 0 errno code on error.
- *
- * All notifications follow the same format; they need to start with a
- * 'struct wa_notif_hdr' header, so it is easy to parse through
- * them. We just break the buffer in individual notifications (the
- * standard doesn't say if it can be done or is forbidden, so we are
- * cautious) and dispatch each.
- *
- * So the handling layers are is:
- *
- *   WA specific notification (from NEP)
- *      Device Notification Received -> wa_handle_notif_dn()
- *        WUSB Device notification generic handling
- *      BPST Adjustment -> wa_handle_notif_bpst_adj()
- *      ... -> ...
- *
- * @wa has to be referenced
- */
-static void wa_notif_dispatch(struct work_struct *ws)
-{
-	void *itr;
-	u8 missing = 0;
-	struct wa_notif_work *nw = container_of(ws, struct wa_notif_work,
-						work);
-	struct wahc *wa = nw->wa;
-	struct wa_notif_hdr *notif_hdr;
-	size_t size;
-
-	struct device *dev = &wa->usb_iface->dev;
-
-#if 0
-	/* FIXME: need to check for this??? */
-	if (usb_hcd->state == HC_STATE_QUIESCING)	/* Going down? */
-		goto out;				/* screw it */
-#endif
-	atomic_dec(&wa->notifs_queued);		/* Throttling ctl */
-	size = nw->size;
-	itr = nw->data;
-
-	while (size) {
-		if (size < sizeof(*notif_hdr)) {
-			missing = sizeof(*notif_hdr) - size;
-			goto exhausted_buffer;
-		}
-		notif_hdr = itr;
-		if (size < notif_hdr->bLength)
-			goto exhausted_buffer;
-		itr += notif_hdr->bLength;
-		size -= notif_hdr->bLength;
-		/* Dispatch the notification [don't use itr or size!] */
-		switch (notif_hdr->bNotifyType) {
-		case HWA_NOTIF_DN: {
-			struct hwa_notif_dn *hwa_dn;
-			hwa_dn = container_of(notif_hdr, struct hwa_notif_dn,
-					      hdr);
-			wusbhc_handle_dn(wa->wusb, hwa_dn->bSourceDeviceAddr,
-					 hwa_dn->dndata,
-					 notif_hdr->bLength - sizeof(*hwa_dn));
-			break;
-		}
-		case WA_NOTIF_TRANSFER:
-			wa_handle_notif_xfer(wa, notif_hdr);
-			break;
-		case HWA_NOTIF_BPST_ADJ:
-			break; /* no action needed for BPST ADJ. */
-		case DWA_NOTIF_RWAKE:
-		case DWA_NOTIF_PORTSTATUS:
-			/* FIXME: unimplemented WA NOTIFs */
-			/* fallthru */
-		default:
-			dev_err(dev, "HWA: unknown notification 0x%x, "
-				"%zu bytes; discarding\n",
-				notif_hdr->bNotifyType,
-				(size_t)notif_hdr->bLength);
-			break;
-		}
-	}
-out:
-	wa_put(wa);
-	kfree(nw);
-	return;
-
-	/* THIS SHOULD NOT HAPPEN
-	 *
-	 * Buffer exahusted with partial data remaining; just warn and
-	 * discard the data, as this should not happen.
-	 */
-exhausted_buffer:
-	dev_warn(dev, "HWA: device sent short notification, "
-		 "%d bytes missing; discarding %d bytes.\n",
-		 missing, (int)size);
-	goto out;
-}
-
-/*
- * Deliver incoming WA notifications to the wusbwa workqueue
- *
- * @wa:	Pointer the Wire Adapter Controller Data Streaming
- *              instance (part of an 'struct usb_hcd').
- * @size:       Size of the received buffer
- * @returns     0 if ok, < 0 errno code on error.
- *
- * The input buffer is @wa->nep_buffer, with @size bytes
- * (guaranteed to fit in the allocated space,
- * @wa->nep_buffer_size).
- */
-static int wa_nep_queue(struct wahc *wa, size_t size)
-{
-	int result = 0;
-	struct device *dev = &wa->usb_iface->dev;
-	struct wa_notif_work *nw;
-
-	/* dev_fnstart(dev, "(wa %p, size %zu)\n", wa, size); */
-	BUG_ON(size > wa->nep_buffer_size);
-	if (size == 0)
-		goto out;
-	if (atomic_read(&wa->notifs_queued) > 200) {
-		if (printk_ratelimit())
-			dev_err(dev, "Too many notifications queued, "
-				"throttling back\n");
-		goto out;
-	}
-	nw = kzalloc(sizeof(*nw) + size, GFP_ATOMIC);
-	if (nw == NULL) {
-		if (printk_ratelimit())
-			dev_err(dev, "No memory to queue notification\n");
-		result = -ENOMEM;
-		goto out;
-	}
-	INIT_WORK(&nw->work, wa_notif_dispatch);
-	nw->wa = wa_get(wa);
-	nw->size = size;
-	memcpy(nw->data, wa->nep_buffer, size);
-	atomic_inc(&wa->notifs_queued);		/* Throttling ctl */
-	queue_work(wusbd, &nw->work);
-out:
-	/* dev_fnend(dev, "(wa %p, size %zu) = result\n", wa, size, result); */
-	return result;
-}
-
-/*
- * Callback for the notification event endpoint
- *
- * Check's that everything is fine and then passes the data to be
- * queued to the workqueue.
- */
-static void wa_nep_cb(struct urb *urb)
-{
-	int result;
-	struct wahc *wa = urb->context;
-	struct device *dev = &wa->usb_iface->dev;
-
-	switch (result = urb->status) {
-	case 0:
-		result = wa_nep_queue(wa, urb->actual_length);
-		if (result < 0)
-			dev_err(dev, "NEP: unable to process notification(s): "
-				"%d\n", result);
-		break;
-	case -ECONNRESET:	/* Not an error, but a controlled situation; */
-	case -ENOENT:		/* (we killed the URB)...so, no broadcast */
-	case -ESHUTDOWN:
-		dev_dbg(dev, "NEP: going down %d\n", urb->status);
-		goto out;
-	default:	/* On general errors, we retry unless it gets ugly */
-		if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "NEP: URB max acceptable errors "
-				"exceeded, resetting device\n");
-			wa_reset_all(wa);
-			goto out;
-		}
-		dev_err(dev, "NEP: URB error %d\n", urb->status);
-	}
-	result = wa_nep_arm(wa, GFP_ATOMIC);
-	if (result < 0) {
-		dev_err(dev, "NEP: cannot submit URB: %d\n", result);
-		wa_reset_all(wa);
-	}
-out:
-	return;
-}
-
-/*
- * Initialize @wa's notification and event's endpoint stuff
- *
- * This includes the allocating the read buffer, the context ID
- * allocation bitmap, the URB and submitting the URB.
- */
-int wa_nep_create(struct wahc *wa, struct usb_interface *iface)
-{
-	int result;
-	struct usb_endpoint_descriptor *epd;
-	struct usb_device *usb_dev = interface_to_usbdev(iface);
-	struct device *dev = &iface->dev;
-
-	edc_init(&wa->nep_edc);
-	epd = &iface->cur_altsetting->endpoint[0].desc;
-	wa->nep_buffer_size = 1024;
-	wa->nep_buffer = kmalloc(wa->nep_buffer_size, GFP_KERNEL);
-	if (!wa->nep_buffer)
-		goto error_nep_buffer;
-	wa->nep_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (wa->nep_urb == NULL)
-		goto error_urb_alloc;
-	usb_fill_int_urb(wa->nep_urb, usb_dev,
-			 usb_rcvintpipe(usb_dev, epd->bEndpointAddress),
-			 wa->nep_buffer, wa->nep_buffer_size,
-			 wa_nep_cb, wa, epd->bInterval);
-	result = wa_nep_arm(wa, GFP_KERNEL);
-	if (result < 0) {
-		dev_err(dev, "Cannot submit notification URB: %d\n", result);
-		goto error_nep_arm;
-	}
-	return 0;
-
-error_nep_arm:
-	usb_free_urb(wa->nep_urb);
-error_urb_alloc:
-	kfree(wa->nep_buffer);
-error_nep_buffer:
-	return -ENOMEM;
-}
-
-void wa_nep_destroy(struct wahc *wa)
-{
-	wa_nep_disarm(wa);
-	usb_free_urb(wa->nep_urb);
-	kfree(wa->nep_buffer);
-}
diff --git a/drivers/usb/wusbcore/wa-rpipe.c b/drivers/usb/wusbcore/wa-rpipe.c
deleted file mode 100644
index a5734cbcd5ad..000000000000
--- a/drivers/usb/wusbcore/wa-rpipe.c
+++ /dev/null
@@ -1,539 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB Wire Adapter
- * rpipe management
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * FIXME: docs
- *
- * RPIPE
- *
- *   Targeted at different downstream endpoints
- *
- *   Descriptor: use to config the remote pipe.
- *
- *   The number of blocks could be dynamic (wBlocks in descriptor is
- *   0)--need to schedule them then.
- *
- * Each bit in wa->rpipe_bm represents if an rpipe is being used or
- * not. Rpipes are represented with a 'struct wa_rpipe' that is
- * attached to the hcpriv member of a 'struct usb_host_endpoint'.
- *
- * When you need to xfer data to an endpoint, you get an rpipe for it
- * with wa_ep_rpipe_get(), which gives you a reference to the rpipe
- * and keeps a single one (the first one) with the endpoint. When you
- * are done transferring, you drop that reference. At the end the
- * rpipe is always allocated and bound to the endpoint. There it might
- * be recycled when not used.
- *
- * Addresses:
- *
- *  We use a 1:1 mapping mechanism between port address (0 based
- *  index, actually) and the address. The USB stack knows about this.
- *
- *  USB Stack port number    4 (1 based)
- *  WUSB code port index     3 (0 based)
- *  USB Address             5 (2 based -- 0 is for default, 1 for root hub)
- *
- *  Now, because we don't use the concept as default address exactly
- *  like the (wired) USB code does, we need to kind of skip it. So we
- *  never take addresses from the urb->pipe, but from the
- *  urb->dev->devnum, to make sure that we always have the right
- *  destination address.
- */
-#include <linux/atomic.h>
-#include <linux/bitmap.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-
-#include "wusbhc.h"
-#include "wa-hc.h"
-
-static int __rpipe_get_descr(struct wahc *wa,
-			     struct usb_rpipe_descriptor *descr, u16 index)
-{
-	ssize_t result;
-	struct device *dev = &wa->usb_iface->dev;
-
-	/* Get the RPIPE descriptor -- we cannot use the usb_get_descriptor()
-	 * function because the arguments are different.
-	 */
-	result = usb_control_msg(
-		wa->usb_dev, usb_rcvctrlpipe(wa->usb_dev, 0),
-		USB_REQ_GET_DESCRIPTOR,
-		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_RPIPE,
-		USB_DT_RPIPE<<8, index, descr, sizeof(*descr),
-		USB_CTRL_GET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "rpipe %u: get descriptor failed: %d\n",
-			index, (int)result);
-		goto error;
-	}
-	if (result < sizeof(*descr)) {
-		dev_err(dev, "rpipe %u: got short descriptor "
-			"(%zd vs %zd bytes needed)\n",
-			index, result, sizeof(*descr));
-		result = -EINVAL;
-		goto error;
-	}
-	result = 0;
-
-error:
-	return result;
-}
-
-/*
- *
- * The descriptor is assumed to be properly initialized (ie: you got
- * it through __rpipe_get_descr()).
- */
-static int __rpipe_set_descr(struct wahc *wa,
-			     struct usb_rpipe_descriptor *descr, u16 index)
-{
-	ssize_t result;
-	struct device *dev = &wa->usb_iface->dev;
-
-	/* we cannot use the usb_get_descriptor() function because the
-	 * arguments are different.
-	 */
-	result = usb_control_msg(
-		wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-		USB_REQ_SET_DESCRIPTOR,
-		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_RPIPE,
-		USB_DT_RPIPE<<8, index, descr, sizeof(*descr),
-		USB_CTRL_SET_TIMEOUT);
-	if (result < 0) {
-		dev_err(dev, "rpipe %u: set descriptor failed: %d\n",
-			index, (int)result);
-		goto error;
-	}
-	if (result < sizeof(*descr)) {
-		dev_err(dev, "rpipe %u: sent short descriptor "
-			"(%zd vs %zd bytes required)\n",
-			index, result, sizeof(*descr));
-		result = -EINVAL;
-		goto error;
-	}
-	result = 0;
-
-error:
-	return result;
-
-}
-
-static void rpipe_init(struct wa_rpipe *rpipe)
-{
-	kref_init(&rpipe->refcnt);
-	spin_lock_init(&rpipe->seg_lock);
-	INIT_LIST_HEAD(&rpipe->seg_list);
-	INIT_LIST_HEAD(&rpipe->list_node);
-}
-
-static unsigned rpipe_get_idx(struct wahc *wa, unsigned rpipe_idx)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&wa->rpipe_lock, flags);
-	rpipe_idx = find_next_zero_bit(wa->rpipe_bm, wa->rpipes, rpipe_idx);
-	if (rpipe_idx < wa->rpipes)
-		set_bit(rpipe_idx, wa->rpipe_bm);
-	spin_unlock_irqrestore(&wa->rpipe_lock, flags);
-
-	return rpipe_idx;
-}
-
-static void rpipe_put_idx(struct wahc *wa, unsigned rpipe_idx)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&wa->rpipe_lock, flags);
-	clear_bit(rpipe_idx, wa->rpipe_bm);
-	spin_unlock_irqrestore(&wa->rpipe_lock, flags);
-}
-
-void rpipe_destroy(struct kref *_rpipe)
-{
-	struct wa_rpipe *rpipe = container_of(_rpipe, struct wa_rpipe, refcnt);
-	u8 index = le16_to_cpu(rpipe->descr.wRPipeIndex);
-
-	if (rpipe->ep)
-		rpipe->ep->hcpriv = NULL;
-	rpipe_put_idx(rpipe->wa, index);
-	wa_put(rpipe->wa);
-	kfree(rpipe);
-}
-EXPORT_SYMBOL_GPL(rpipe_destroy);
-
-/*
- * Locate an idle rpipe, create an structure for it and return it
- *
- * @wa	  is referenced and unlocked
- * @crs   enum rpipe_attr, required endpoint characteristics
- *
- * The rpipe can be used only sequentially (not in parallel).
- *
- * The rpipe is moved into the "ready" state.
- */
-static int rpipe_get_idle(struct wa_rpipe **prpipe, struct wahc *wa, u8 crs,
-			  gfp_t gfp)
-{
-	int result;
-	unsigned rpipe_idx;
-	struct wa_rpipe *rpipe;
-	struct device *dev = &wa->usb_iface->dev;
-
-	rpipe = kzalloc(sizeof(*rpipe), gfp);
-	if (rpipe == NULL)
-		return -ENOMEM;
-	rpipe_init(rpipe);
-
-	/* Look for an idle pipe */
-	for (rpipe_idx = 0; rpipe_idx < wa->rpipes; rpipe_idx++) {
-		rpipe_idx = rpipe_get_idx(wa, rpipe_idx);
-		if (rpipe_idx >= wa->rpipes)	/* no more pipes :( */
-			break;
-		result =  __rpipe_get_descr(wa, &rpipe->descr, rpipe_idx);
-		if (result < 0)
-			dev_err(dev, "Can't get descriptor for rpipe %u: %d\n",
-				rpipe_idx, result);
-		else if ((rpipe->descr.bmCharacteristics & crs) != 0)
-			goto found;
-		rpipe_put_idx(wa, rpipe_idx);
-	}
-	*prpipe = NULL;
-	kfree(rpipe);
-	return -ENXIO;
-
-found:
-	set_bit(rpipe_idx, wa->rpipe_bm);
-	rpipe->wa = wa_get(wa);
-	*prpipe = rpipe;
-	return 0;
-}
-
-static int __rpipe_reset(struct wahc *wa, unsigned index)
-{
-	int result;
-	struct device *dev = &wa->usb_iface->dev;
-
-	result = usb_control_msg(
-		wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-		USB_REQ_RPIPE_RESET,
-		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_RPIPE,
-		0, index, NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (result < 0)
-		dev_err(dev, "rpipe %u: reset failed: %d\n",
-			index, result);
-	return result;
-}
-
-/*
- * Fake companion descriptor for ep0
- *
- * See WUSB1.0[7.4.4], most of this is zero for bulk/int/ctl
- */
-static struct usb_wireless_ep_comp_descriptor epc0 = {
-	.bLength = sizeof(epc0),
-	.bDescriptorType = USB_DT_WIRELESS_ENDPOINT_COMP,
-	.bMaxBurst = 1,
-	.bMaxSequence = 2,
-};
-
-/*
- * Look for EP companion descriptor
- *
- * Get there, look for Inara in the endpoint's extra descriptors
- */
-static struct usb_wireless_ep_comp_descriptor *rpipe_epc_find(
-		struct device *dev, struct usb_host_endpoint *ep)
-{
-	void *itr;
-	size_t itr_size;
-	struct usb_descriptor_header *hdr;
-	struct usb_wireless_ep_comp_descriptor *epcd;
-
-	if (ep->desc.bEndpointAddress == 0) {
-		epcd = &epc0;
-		goto out;
-	}
-	itr = ep->extra;
-	itr_size = ep->extralen;
-	epcd = NULL;
-	while (itr_size > 0) {
-		if (itr_size < sizeof(*hdr)) {
-			dev_err(dev, "HW Bug? ep 0x%02x: extra descriptors "
-				"at offset %zu: only %zu bytes left\n",
-				ep->desc.bEndpointAddress,
-				itr - (void *) ep->extra, itr_size);
-			break;
-		}
-		hdr = itr;
-		if (hdr->bDescriptorType == USB_DT_WIRELESS_ENDPOINT_COMP) {
-			epcd = itr;
-			break;
-		}
-		if (hdr->bLength > itr_size) {
-			dev_err(dev, "HW Bug? ep 0x%02x: extra descriptor "
-				"at offset %zu (type 0x%02x) "
-				"length %d but only %zu bytes left\n",
-				ep->desc.bEndpointAddress,
-				itr - (void *) ep->extra, hdr->bDescriptorType,
-				hdr->bLength, itr_size);
-			break;
-		}
-		itr += hdr->bLength;
-		itr_size -= hdr->bLength;
-	}
-out:
-	return epcd;
-}
-
-/*
- * Aim an rpipe to its device & endpoint destination
- *
- * Make sure we change the address to unauthenticated if the device
- * is WUSB and it is not authenticated.
- */
-static int rpipe_aim(struct wa_rpipe *rpipe, struct wahc *wa,
-		     struct usb_host_endpoint *ep, struct urb *urb, gfp_t gfp)
-{
-	int result = -ENOMSG;	/* better code for lack of companion? */
-	struct device *dev = &wa->usb_iface->dev;
-	struct usb_device *usb_dev = urb->dev;
-	struct usb_wireless_ep_comp_descriptor *epcd;
-	u32 ack_window, epcd_max_sequence;
-	u8 unauth;
-
-	epcd = rpipe_epc_find(dev, ep);
-	if (epcd == NULL) {
-		dev_err(dev, "ep 0x%02x: can't find companion descriptor\n",
-			ep->desc.bEndpointAddress);
-		goto error;
-	}
-	unauth = usb_dev->wusb && !usb_dev->authenticated ? 0x80 : 0;
-	__rpipe_reset(wa, le16_to_cpu(rpipe->descr.wRPipeIndex));
-	atomic_set(&rpipe->segs_available,
-		le16_to_cpu(rpipe->descr.wRequests));
-	/* FIXME: block allocation system; request with queuing and timeout */
-	/* FIXME: compute so seg_size > ep->maxpktsize */
-	rpipe->descr.wBlocks = cpu_to_le16(16);		/* given */
-	/* ep0 maxpktsize is 0x200 (WUSB1.0[4.8.1]) */
-	if (usb_endpoint_xfer_isoc(&ep->desc))
-		rpipe->descr.wMaxPacketSize = epcd->wOverTheAirPacketSize;
-	else
-		rpipe->descr.wMaxPacketSize = ep->desc.wMaxPacketSize;
-
-	rpipe->descr.hwa_bMaxBurst = max(min_t(unsigned int,
-				epcd->bMaxBurst, 16U), 1U);
-	rpipe->descr.hwa_bDeviceInfoIndex =
-			wusb_port_no_to_idx(urb->dev->portnum);
-	/* FIXME: use maximum speed as supported or recommended by device */
-	rpipe->descr.bSpeed = usb_pipeendpoint(urb->pipe) == 0 ?
-		UWB_PHY_RATE_53 : UWB_PHY_RATE_200;
-
-	dev_dbg(dev, "addr %u (0x%02x) rpipe #%u ep# %u speed %d\n",
-		urb->dev->devnum, urb->dev->devnum | unauth,
-		le16_to_cpu(rpipe->descr.wRPipeIndex),
-		usb_pipeendpoint(urb->pipe), rpipe->descr.bSpeed);
-
-	rpipe->descr.hwa_reserved = 0;
-
-	rpipe->descr.bEndpointAddress = ep->desc.bEndpointAddress;
-	/* FIXME: bDataSequence */
-	rpipe->descr.bDataSequence = 0;
-
-	/* start with base window of hwa_bMaxBurst bits starting at 0. */
-	ack_window = 0xFFFFFFFF >> (32 - rpipe->descr.hwa_bMaxBurst);
-	rpipe->descr.dwCurrentWindow = cpu_to_le32(ack_window);
-	epcd_max_sequence = max(min_t(unsigned int,
-			epcd->bMaxSequence, 32U), 2U);
-	rpipe->descr.bMaxDataSequence = epcd_max_sequence - 1;
-	rpipe->descr.bInterval = ep->desc.bInterval;
-	if (usb_endpoint_xfer_isoc(&ep->desc))
-		rpipe->descr.bOverTheAirInterval = epcd->bOverTheAirInterval;
-	else
-		rpipe->descr.bOverTheAirInterval = 0;	/* 0 if not isoc */
-	/* FIXME: xmit power & preamble blah blah */
-	rpipe->descr.bmAttribute = (ep->desc.bmAttributes &
-					USB_ENDPOINT_XFERTYPE_MASK);
-	/* rpipe->descr.bmCharacteristics RO */
-	rpipe->descr.bmRetryOptions = (wa->wusb->retry_count & 0xF);
-	/* FIXME: use for assessing link quality? */
-	rpipe->descr.wNumTransactionErrors = 0;
-	result = __rpipe_set_descr(wa, &rpipe->descr,
-				   le16_to_cpu(rpipe->descr.wRPipeIndex));
-	if (result < 0) {
-		dev_err(dev, "Cannot aim rpipe: %d\n", result);
-		goto error;
-	}
-	result = 0;
-error:
-	return result;
-}
-
-/*
- * Check an aimed rpipe to make sure it points to where we want
- *
- * We use bit 19 of the Linux USB pipe bitmap for unauth vs auth
- * space; when it is like that, we or 0x80 to make an unauth address.
- */
-static int rpipe_check_aim(const struct wa_rpipe *rpipe, const struct wahc *wa,
-			   const struct usb_host_endpoint *ep,
-			   const struct urb *urb, gfp_t gfp)
-{
-	int result = 0;
-	struct device *dev = &wa->usb_iface->dev;
-	u8 portnum = wusb_port_no_to_idx(urb->dev->portnum);
-
-#define AIM_CHECK(rdf, val, text)					\
-	do {								\
-		if (rpipe->descr.rdf != (val)) {			\
-			dev_err(dev,					\
-				"rpipe aim discrepancy: " #rdf " " text "\n", \
-				rpipe->descr.rdf, (val));		\
-			result = -EINVAL;				\
-			WARN_ON(1);					\
-		}							\
-	} while (0)
-	AIM_CHECK(hwa_bDeviceInfoIndex, portnum, "(%u vs %u)");
-	AIM_CHECK(bSpeed, usb_pipeendpoint(urb->pipe) == 0 ?
-			UWB_PHY_RATE_53 : UWB_PHY_RATE_200,
-		  "(%u vs %u)");
-	AIM_CHECK(bEndpointAddress, ep->desc.bEndpointAddress, "(%u vs %u)");
-	AIM_CHECK(bInterval, ep->desc.bInterval, "(%u vs %u)");
-	AIM_CHECK(bmAttribute, ep->desc.bmAttributes & 0x03, "(%u vs %u)");
-#undef AIM_CHECK
-	return result;
-}
-
-#ifndef CONFIG_BUG
-#define CONFIG_BUG 0
-#endif
-
-/*
- * Make sure there is an rpipe allocated for an endpoint
- *
- * If already allocated, we just refcount it; if not, we get an
- * idle one, aim it to the right location and take it.
- *
- * Attaches to ep->hcpriv and rpipe->ep to ep.
- */
-int rpipe_get_by_ep(struct wahc *wa, struct usb_host_endpoint *ep,
-		    struct urb *urb, gfp_t gfp)
-{
-	int result = 0;
-	struct device *dev = &wa->usb_iface->dev;
-	struct wa_rpipe *rpipe;
-	u8 eptype;
-
-	mutex_lock(&wa->rpipe_mutex);
-	rpipe = ep->hcpriv;
-	if (rpipe != NULL) {
-		if (CONFIG_BUG == 1) {
-			result = rpipe_check_aim(rpipe, wa, ep, urb, gfp);
-			if (result < 0)
-				goto error;
-		}
-		__rpipe_get(rpipe);
-		dev_dbg(dev, "ep 0x%02x: reusing rpipe %u\n",
-			ep->desc.bEndpointAddress,
-			le16_to_cpu(rpipe->descr.wRPipeIndex));
-	} else {
-		/* hmm, assign idle rpipe, aim it */
-		result = -ENOBUFS;
-		eptype = ep->desc.bmAttributes & 0x03;
-		result = rpipe_get_idle(&rpipe, wa, 1 << eptype, gfp);
-		if (result < 0)
-			goto error;
-		result = rpipe_aim(rpipe, wa, ep, urb, gfp);
-		if (result < 0) {
-			rpipe_put(rpipe);
-			goto error;
-		}
-		ep->hcpriv = rpipe;
-		rpipe->ep = ep;
-		__rpipe_get(rpipe);	/* for caching into ep->hcpriv */
-		dev_dbg(dev, "ep 0x%02x: using rpipe %u\n",
-			ep->desc.bEndpointAddress,
-			le16_to_cpu(rpipe->descr.wRPipeIndex));
-	}
-error:
-	mutex_unlock(&wa->rpipe_mutex);
-	return result;
-}
-
-/*
- * Allocate the bitmap for each rpipe.
- */
-int wa_rpipes_create(struct wahc *wa)
-{
-	wa->rpipes = le16_to_cpu(wa->wa_descr->wNumRPipes);
-	wa->rpipe_bm = bitmap_zalloc(wa->rpipes, GFP_KERNEL);
-	if (wa->rpipe_bm == NULL)
-		return -ENOMEM;
-	return 0;
-}
-
-void wa_rpipes_destroy(struct wahc *wa)
-{
-	struct device *dev = &wa->usb_iface->dev;
-
-	if (!bitmap_empty(wa->rpipe_bm, wa->rpipes)) {
-		WARN_ON(1);
-		dev_err(dev, "BUG: pipes not released on exit: %*pb\n",
-			wa->rpipes, wa->rpipe_bm);
-	}
-	bitmap_free(wa->rpipe_bm);
-}
-
-/*
- * Release resources allocated for an endpoint
- *
- * If there is an associated rpipe to this endpoint, Abort any pending
- * transfers and put it. If the rpipe ends up being destroyed,
- * __rpipe_destroy() will cleanup ep->hcpriv.
- *
- * This is called before calling hcd->stop(), so you don't need to do
- * anything else in there.
- */
-void rpipe_ep_disable(struct wahc *wa, struct usb_host_endpoint *ep)
-{
-	struct wa_rpipe *rpipe;
-
-	mutex_lock(&wa->rpipe_mutex);
-	rpipe = ep->hcpriv;
-	if (rpipe != NULL) {
-		u16 index = le16_to_cpu(rpipe->descr.wRPipeIndex);
-
-		usb_control_msg(
-			wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			USB_REQ_RPIPE_ABORT,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_RPIPE,
-			0, index, NULL, 0, USB_CTRL_SET_TIMEOUT);
-		rpipe_put(rpipe);
-	}
-	mutex_unlock(&wa->rpipe_mutex);
-}
-EXPORT_SYMBOL_GPL(rpipe_ep_disable);
-
-/* Clear the stalled status of an RPIPE. */
-void rpipe_clear_feature_stalled(struct wahc *wa, struct usb_host_endpoint *ep)
-{
-	struct wa_rpipe *rpipe;
-
-	mutex_lock(&wa->rpipe_mutex);
-	rpipe = ep->hcpriv;
-	if (rpipe != NULL) {
-		u16 index = le16_to_cpu(rpipe->descr.wRPipeIndex);
-
-		usb_control_msg(
-			wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
-			USB_REQ_CLEAR_FEATURE,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_RPIPE,
-			RPIPE_STALL, index, NULL, 0, USB_CTRL_SET_TIMEOUT);
-	}
-	mutex_unlock(&wa->rpipe_mutex);
-}
-EXPORT_SYMBOL_GPL(rpipe_clear_feature_stalled);
diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
deleted file mode 100644
index abf88cea37bb..000000000000
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ /dev/null
@@ -1,2927 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * WUSB Wire Adapter
- * Data transfer and URB enqueing
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * How transfers work: get a buffer, break it up in segments (segment
- * size is a multiple of the maxpacket size). For each segment issue a
- * segment request (struct wa_xfer_*), then send the data buffer if
- * out or nothing if in (all over the DTO endpoint).
- *
- * For each submitted segment request, a notification will come over
- * the NEP endpoint and a transfer result (struct xfer_result) will
- * arrive in the DTI URB. Read it, get the xfer ID, see if there is
- * data coming (inbound transfer), schedule a read and handle it.
- *
- * Sounds simple, it is a pain to implement.
- *
- *
- * ENTRY POINTS
- *
- *   FIXME
- *
- * LIFE CYCLE / STATE DIAGRAM
- *
- *   FIXME
- *
- * THIS CODE IS DISGUSTING
- *
- *   Warned you are; it's my second try and still not happy with it.
- *
- * NOTES:
- *
- *   - No iso
- *
- *   - Supports DMA xfers, control, bulk and maybe interrupt
- *
- *   - Does not recycle unused rpipes
- *
- *     An rpipe is assigned to an endpoint the first time it is used,
- *     and then it's there, assigned, until the endpoint is disabled
- *     (destroyed [{h,d}wahc_op_ep_disable()]. The assignment of the
- *     rpipe to the endpoint is done under the wa->rpipe_sem semaphore
- *     (should be a mutex).
- *
- *     Two methods it could be done:
- *
- *     (a) set up a timer every time an rpipe's use count drops to 1
- *         (which means unused) or when a transfer ends. Reset the
- *         timer when a xfer is queued. If the timer expires, release
- *         the rpipe [see rpipe_ep_disable()].
- *
- *     (b) when looking for free rpipes to attach [rpipe_get_by_ep()],
- *         when none are found go over the list, check their endpoint
- *         and their activity record (if no last-xfer-done-ts in the
- *         last x seconds) take it
- *
- *     However, due to the fact that we have a set of limited
- *     resources (max-segments-at-the-same-time per xfer,
- *     xfers-per-ripe, blocks-per-rpipe, rpipes-per-host), at the end
- *     we are going to have to rebuild all this based on an scheduler,
- *     to where we have a list of transactions to do and based on the
- *     availability of the different required components (blocks,
- *     rpipes, segment slots, etc), we go scheduling them. Painful.
- */
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/hash.h>
-#include <linux/ratelimit.h>
-#include <linux/export.h>
-#include <linux/scatterlist.h>
-
-#include "wa-hc.h"
-#include "wusbhc.h"
-
-enum {
-	/* [WUSB] section 8.3.3 allocates 7 bits for the segment index. */
-	WA_SEGS_MAX = 128,
-};
-
-enum wa_seg_status {
-	WA_SEG_NOTREADY,
-	WA_SEG_READY,
-	WA_SEG_DELAYED,
-	WA_SEG_SUBMITTED,
-	WA_SEG_PENDING,
-	WA_SEG_DTI_PENDING,
-	WA_SEG_DONE,
-	WA_SEG_ERROR,
-	WA_SEG_ABORTED,
-};
-
-static void wa_xfer_delayed_run(struct wa_rpipe *);
-static int __wa_xfer_delayed_run(struct wa_rpipe *rpipe, int *dto_waiting);
-
-/*
- * Life cycle governed by 'struct urb' (the refcount of the struct is
- * that of the 'struct urb' and usb_free_urb() would free the whole
- * struct).
- */
-struct wa_seg {
-	struct urb tr_urb;		/* transfer request urb. */
-	struct urb *isoc_pack_desc_urb;	/* for isoc packet descriptor. */
-	struct urb *dto_urb;		/* for data output. */
-	struct list_head list_node;	/* for rpipe->req_list */
-	struct wa_xfer *xfer;		/* out xfer */
-	u8 index;			/* which segment we are */
-	int isoc_frame_count;	/* number of isoc frames in this segment. */
-	int isoc_frame_offset;	/* starting frame offset in the xfer URB. */
-	/* Isoc frame that the current transfer buffer corresponds to. */
-	int isoc_frame_index;
-	int isoc_size;	/* size of all isoc frames sent by this seg. */
-	enum wa_seg_status status;
-	ssize_t result;			/* bytes xfered or error */
-	struct wa_xfer_hdr xfer_hdr;
-};
-
-static inline void wa_seg_init(struct wa_seg *seg)
-{
-	usb_init_urb(&seg->tr_urb);
-
-	/* set the remaining memory to 0. */
-	memset(((void *)seg) + sizeof(seg->tr_urb), 0,
-		sizeof(*seg) - sizeof(seg->tr_urb));
-}
-
-/*
- * Protected by xfer->lock
- *
- */
-struct wa_xfer {
-	struct kref refcnt;
-	struct list_head list_node;
-	spinlock_t lock;
-	u32 id;
-
-	struct wahc *wa;		/* Wire adapter we are plugged to */
-	struct usb_host_endpoint *ep;
-	struct urb *urb;		/* URB we are transferring for */
-	struct wa_seg **seg;		/* transfer segments */
-	u8 segs, segs_submitted, segs_done;
-	unsigned is_inbound:1;
-	unsigned is_dma:1;
-	size_t seg_size;
-	int result;
-
-	gfp_t gfp;			/* allocation mask */
-
-	struct wusb_dev *wusb_dev;	/* for activity timestamps */
-};
-
-static void __wa_populate_dto_urb_isoc(struct wa_xfer *xfer,
-	struct wa_seg *seg, int curr_iso_frame);
-static void wa_complete_remaining_xfer_segs(struct wa_xfer *xfer,
-		int starting_index, enum wa_seg_status status);
-
-static inline void wa_xfer_init(struct wa_xfer *xfer)
-{
-	kref_init(&xfer->refcnt);
-	INIT_LIST_HEAD(&xfer->list_node);
-	spin_lock_init(&xfer->lock);
-}
-
-/*
- * Destroy a transfer structure
- *
- * Note that freeing xfer->seg[cnt]->tr_urb will free the containing
- * xfer->seg[cnt] memory that was allocated by __wa_xfer_setup_segs.
- */
-static void wa_xfer_destroy(struct kref *_xfer)
-{
-	struct wa_xfer *xfer = container_of(_xfer, struct wa_xfer, refcnt);
-	if (xfer->seg) {
-		unsigned cnt;
-		for (cnt = 0; cnt < xfer->segs; cnt++) {
-			struct wa_seg *seg = xfer->seg[cnt];
-			if (seg) {
-				usb_free_urb(seg->isoc_pack_desc_urb);
-				if (seg->dto_urb) {
-					kfree(seg->dto_urb->sg);
-					usb_free_urb(seg->dto_urb);
-				}
-				usb_free_urb(&seg->tr_urb);
-			}
-		}
-		kfree(xfer->seg);
-	}
-	kfree(xfer);
-}
-
-static void wa_xfer_get(struct wa_xfer *xfer)
-{
-	kref_get(&xfer->refcnt);
-}
-
-static void wa_xfer_put(struct wa_xfer *xfer)
-{
-	kref_put(&xfer->refcnt, wa_xfer_destroy);
-}
-
-/*
- * Try to get exclusive access to the DTO endpoint resource.  Return true
- * if successful.
- */
-static inline int __wa_dto_try_get(struct wahc *wa)
-{
-	return (test_and_set_bit(0, &wa->dto_in_use) == 0);
-}
-
-/* Release the DTO endpoint resource. */
-static inline void __wa_dto_put(struct wahc *wa)
-{
-	clear_bit_unlock(0, &wa->dto_in_use);
-}
-
-/* Service RPIPEs that are waiting on the DTO resource. */
-static void wa_check_for_delayed_rpipes(struct wahc *wa)
-{
-	unsigned long flags;
-	int dto_waiting = 0;
-	struct wa_rpipe *rpipe;
-
-	spin_lock_irqsave(&wa->rpipe_lock, flags);
-	while (!list_empty(&wa->rpipe_delayed_list) && !dto_waiting) {
-		rpipe = list_first_entry(&wa->rpipe_delayed_list,
-				struct wa_rpipe, list_node);
-		__wa_xfer_delayed_run(rpipe, &dto_waiting);
-		/* remove this RPIPE from the list if it is not waiting. */
-		if (!dto_waiting) {
-			pr_debug("%s: RPIPE %d serviced and removed from delayed list.\n",
-				__func__,
-				le16_to_cpu(rpipe->descr.wRPipeIndex));
-			list_del_init(&rpipe->list_node);
-		}
-	}
-	spin_unlock_irqrestore(&wa->rpipe_lock, flags);
-}
-
-/* add this RPIPE to the end of the delayed RPIPE list. */
-static void wa_add_delayed_rpipe(struct wahc *wa, struct wa_rpipe *rpipe)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&wa->rpipe_lock, flags);
-	/* add rpipe to the list if it is not already on it. */
-	if (list_empty(&rpipe->list_node)) {
-		pr_debug("%s: adding RPIPE %d to the delayed list.\n",
-			__func__, le16_to_cpu(rpipe->descr.wRPipeIndex));
-		list_add_tail(&rpipe->list_node, &wa->rpipe_delayed_list);
-	}
-	spin_unlock_irqrestore(&wa->rpipe_lock, flags);
-}
-
-/*
- * xfer is referenced
- *
- * xfer->lock has to be unlocked
- *
- * We take xfer->lock for setting the result; this is a barrier
- * against drivers/usb/core/hcd.c:unlink1() being called after we call
- * usb_hcd_giveback_urb() and wa_urb_dequeue() trying to get a
- * reference to the transfer.
- */
-static void wa_xfer_giveback(struct wa_xfer *xfer)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&xfer->wa->xfer_list_lock, flags);
-	list_del_init(&xfer->list_node);
-	usb_hcd_unlink_urb_from_ep(&(xfer->wa->wusb->usb_hcd), xfer->urb);
-	spin_unlock_irqrestore(&xfer->wa->xfer_list_lock, flags);
-	/* FIXME: segmentation broken -- kills DWA */
-	wusbhc_giveback_urb(xfer->wa->wusb, xfer->urb, xfer->result);
-	wa_put(xfer->wa);
-	wa_xfer_put(xfer);
-}
-
-/*
- * xfer is referenced
- *
- * xfer->lock has to be unlocked
- */
-static void wa_xfer_completion(struct wa_xfer *xfer)
-{
-	if (xfer->wusb_dev)
-		wusb_dev_put(xfer->wusb_dev);
-	rpipe_put(xfer->ep->hcpriv);
-	wa_xfer_giveback(xfer);
-}
-
-/*
- * Initialize a transfer's ID
- *
- * We need to use a sequential number; if we use the pointer or the
- * hash of the pointer, it can repeat over sequential transfers and
- * then it will confuse the HWA....wonder why in hell they put a 32
- * bit handle in there then.
- */
-static void wa_xfer_id_init(struct wa_xfer *xfer)
-{
-	xfer->id = atomic_add_return(1, &xfer->wa->xfer_id_count);
-}
-
-/* Return the xfer's ID. */
-static inline u32 wa_xfer_id(struct wa_xfer *xfer)
-{
-	return xfer->id;
-}
-
-/* Return the xfer's ID in transport format (little endian). */
-static inline __le32 wa_xfer_id_le32(struct wa_xfer *xfer)
-{
-	return cpu_to_le32(xfer->id);
-}
-
-/*
- * If transfer is done, wrap it up and return true
- *
- * xfer->lock has to be locked
- */
-static unsigned __wa_xfer_is_done(struct wa_xfer *xfer)
-{
-	struct device *dev = &xfer->wa->usb_iface->dev;
-	unsigned result, cnt;
-	struct wa_seg *seg;
-	struct urb *urb = xfer->urb;
-	unsigned found_short = 0;
-
-	result = xfer->segs_done == xfer->segs_submitted;
-	if (result == 0)
-		goto out;
-	urb->actual_length = 0;
-	for (cnt = 0; cnt < xfer->segs; cnt++) {
-		seg = xfer->seg[cnt];
-		switch (seg->status) {
-		case WA_SEG_DONE:
-			if (found_short && seg->result > 0) {
-				dev_dbg(dev, "xfer %p ID %08X#%u: bad short segments (%zu)\n",
-					xfer, wa_xfer_id(xfer), cnt,
-					seg->result);
-				urb->status = -EINVAL;
-				goto out;
-			}
-			urb->actual_length += seg->result;
-			if (!(usb_pipeisoc(xfer->urb->pipe))
-				&& seg->result < xfer->seg_size
-			    && cnt != xfer->segs-1)
-				found_short = 1;
-			dev_dbg(dev, "xfer %p ID %08X#%u: DONE short %d "
-				"result %zu urb->actual_length %d\n",
-				xfer, wa_xfer_id(xfer), seg->index, found_short,
-				seg->result, urb->actual_length);
-			break;
-		case WA_SEG_ERROR:
-			xfer->result = seg->result;
-			dev_dbg(dev, "xfer %p ID %08X#%u: ERROR result %zi(0x%08zX)\n",
-				xfer, wa_xfer_id(xfer), seg->index, seg->result,
-				seg->result);
-			goto out;
-		case WA_SEG_ABORTED:
-			xfer->result = seg->result;
-			dev_dbg(dev, "xfer %p ID %08X#%u: ABORTED result %zi(0x%08zX)\n",
-				xfer, wa_xfer_id(xfer), seg->index, seg->result,
-				seg->result);
-			goto out;
-		default:
-			dev_warn(dev, "xfer %p ID %08X#%u: is_done bad state %d\n",
-				 xfer, wa_xfer_id(xfer), cnt, seg->status);
-			xfer->result = -EINVAL;
-			goto out;
-		}
-	}
-	xfer->result = 0;
-out:
-	return result;
-}
-
-/*
- * Mark the given segment as done.  Return true if this completes the xfer.
- * This should only be called for segs that have been submitted to an RPIPE.
- * Delayed segs are not marked as submitted so they do not need to be marked
- * as done when cleaning up.
- *
- * xfer->lock has to be locked
- */
-static unsigned __wa_xfer_mark_seg_as_done(struct wa_xfer *xfer,
-	struct wa_seg *seg, enum wa_seg_status status)
-{
-	seg->status = status;
-	xfer->segs_done++;
-
-	/* check for done. */
-	return __wa_xfer_is_done(xfer);
-}
-
-/*
- * Search for a transfer list ID on the HCD's URB list
- *
- * For 32 bit architectures, we use the pointer itself; for 64 bits, a
- * 32-bit hash of the pointer.
- *
- * @returns NULL if not found.
- */
-static struct wa_xfer *wa_xfer_get_by_id(struct wahc *wa, u32 id)
-{
-	unsigned long flags;
-	struct wa_xfer *xfer_itr;
-	spin_lock_irqsave(&wa->xfer_list_lock, flags);
-	list_for_each_entry(xfer_itr, &wa->xfer_list, list_node) {
-		if (id == xfer_itr->id) {
-			wa_xfer_get(xfer_itr);
-			goto out;
-		}
-	}
-	xfer_itr = NULL;
-out:
-	spin_unlock_irqrestore(&wa->xfer_list_lock, flags);
-	return xfer_itr;
-}
-
-struct wa_xfer_abort_buffer {
-	struct urb urb;
-	struct wahc *wa;
-	struct wa_xfer_abort cmd;
-};
-
-static void __wa_xfer_abort_cb(struct urb *urb)
-{
-	struct wa_xfer_abort_buffer *b = urb->context;
-	struct wahc *wa = b->wa;
-
-	/*
-	 * If the abort request URB failed, then the HWA did not get the abort
-	 * command.  Forcibly clean up the xfer without waiting for a Transfer
-	 * Result from the HWA.
-	 */
-	if (urb->status < 0) {
-		struct wa_xfer *xfer;
-		struct device *dev = &wa->usb_iface->dev;
-
-		xfer = wa_xfer_get_by_id(wa, le32_to_cpu(b->cmd.dwTransferID));
-		dev_err(dev, "%s: Transfer Abort request failed. result: %d\n",
-			__func__, urb->status);
-		if (xfer) {
-			unsigned long flags;
-			int done, seg_index = 0;
-			struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-
-			dev_err(dev, "%s: cleaning up xfer %p ID 0x%08X.\n",
-				__func__, xfer, wa_xfer_id(xfer));
-			spin_lock_irqsave(&xfer->lock, flags);
-			/* skip done segs. */
-			while (seg_index < xfer->segs) {
-				struct wa_seg *seg = xfer->seg[seg_index];
-
-				if ((seg->status == WA_SEG_DONE) ||
-					(seg->status == WA_SEG_ERROR)) {
-					++seg_index;
-				} else {
-					break;
-				}
-			}
-			/* mark remaining segs as aborted. */
-			wa_complete_remaining_xfer_segs(xfer, seg_index,
-				WA_SEG_ABORTED);
-			done = __wa_xfer_is_done(xfer);
-			spin_unlock_irqrestore(&xfer->lock, flags);
-			if (done)
-				wa_xfer_completion(xfer);
-			wa_xfer_delayed_run(rpipe);
-			wa_xfer_put(xfer);
-		} else {
-			dev_err(dev, "%s: xfer ID 0x%08X already gone.\n",
-				 __func__, le32_to_cpu(b->cmd.dwTransferID));
-		}
-	}
-
-	wa_put(wa);	/* taken in __wa_xfer_abort */
-	usb_put_urb(&b->urb);
-}
-
-/*
- * Aborts an ongoing transaction
- *
- * Assumes the transfer is referenced and locked and in a submitted
- * state (mainly that there is an endpoint/rpipe assigned).
- *
- * The callback (see above) does nothing but freeing up the data by
- * putting the URB. Because the URB is allocated at the head of the
- * struct, the whole space we allocated is kfreed. *
- */
-static int __wa_xfer_abort(struct wa_xfer *xfer)
-{
-	int result = -ENOMEM;
-	struct device *dev = &xfer->wa->usb_iface->dev;
-	struct wa_xfer_abort_buffer *b;
-	struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-
-	b = kmalloc(sizeof(*b), GFP_ATOMIC);
-	if (b == NULL)
-		goto error_kmalloc;
-	b->cmd.bLength =  sizeof(b->cmd);
-	b->cmd.bRequestType = WA_XFER_ABORT;
-	b->cmd.wRPipe = rpipe->descr.wRPipeIndex;
-	b->cmd.dwTransferID = wa_xfer_id_le32(xfer);
-	b->wa = wa_get(xfer->wa);
-
-	usb_init_urb(&b->urb);
-	usb_fill_bulk_urb(&b->urb, xfer->wa->usb_dev,
-		usb_sndbulkpipe(xfer->wa->usb_dev,
-				xfer->wa->dto_epd->bEndpointAddress),
-		&b->cmd, sizeof(b->cmd), __wa_xfer_abort_cb, b);
-	result = usb_submit_urb(&b->urb, GFP_ATOMIC);
-	if (result < 0)
-		goto error_submit;
-	return result;				/* callback frees! */
-
-
-error_submit:
-	wa_put(xfer->wa);
-	if (printk_ratelimit())
-		dev_err(dev, "xfer %p: Can't submit abort request: %d\n",
-			xfer, result);
-	kfree(b);
-error_kmalloc:
-	return result;
-
-}
-
-/*
- * Calculate the number of isoc frames starting from isoc_frame_offset
- * that will fit a in transfer segment.
- */
-static int __wa_seg_calculate_isoc_frame_count(struct wa_xfer *xfer,
-	int isoc_frame_offset, int *total_size)
-{
-	int segment_size = 0, frame_count = 0;
-	int index = isoc_frame_offset;
-	struct usb_iso_packet_descriptor *iso_frame_desc =
-		xfer->urb->iso_frame_desc;
-
-	while ((index < xfer->urb->number_of_packets)
-		&& ((segment_size + iso_frame_desc[index].length)
-				<= xfer->seg_size)) {
-		/*
-		 * For Alereon HWA devices, only include an isoc frame in an
-		 * out segment if it is physically contiguous with the previous
-		 * frame.  This is required because those devices expect
-		 * the isoc frames to be sent as a single USB transaction as
-		 * opposed to one transaction per frame with standard HWA.
-		 */
-		if ((xfer->wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC)
-			&& (xfer->is_inbound == 0)
-			&& (index > isoc_frame_offset)
-			&& ((iso_frame_desc[index - 1].offset +
-				iso_frame_desc[index - 1].length) !=
-				iso_frame_desc[index].offset))
-			break;
-
-		/* this frame fits. count it. */
-		++frame_count;
-		segment_size += iso_frame_desc[index].length;
-
-		/* move to the next isoc frame. */
-		++index;
-	}
-
-	*total_size = segment_size;
-	return frame_count;
-}
-
-/*
- *
- * @returns < 0 on error, transfer segment request size if ok
- */
-static ssize_t __wa_xfer_setup_sizes(struct wa_xfer *xfer,
-				     enum wa_xfer_type *pxfer_type)
-{
-	ssize_t result;
-	struct device *dev = &xfer->wa->usb_iface->dev;
-	size_t maxpktsize;
-	struct urb *urb = xfer->urb;
-	struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-
-	switch (rpipe->descr.bmAttribute & 0x3) {
-	case USB_ENDPOINT_XFER_CONTROL:
-		*pxfer_type = WA_XFER_TYPE_CTL;
-		result = sizeof(struct wa_xfer_ctl);
-		break;
-	case USB_ENDPOINT_XFER_INT:
-	case USB_ENDPOINT_XFER_BULK:
-		*pxfer_type = WA_XFER_TYPE_BI;
-		result = sizeof(struct wa_xfer_bi);
-		break;
-	case USB_ENDPOINT_XFER_ISOC:
-		*pxfer_type = WA_XFER_TYPE_ISO;
-		result = sizeof(struct wa_xfer_hwaiso);
-		break;
-	default:
-		/* never happens */
-		BUG();
-		result = -EINVAL;	/* shut gcc up */
-	}
-	xfer->is_inbound = urb->pipe & USB_DIR_IN ? 1 : 0;
-	xfer->is_dma = urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? 1 : 0;
-
-	maxpktsize = le16_to_cpu(rpipe->descr.wMaxPacketSize);
-	xfer->seg_size = le16_to_cpu(rpipe->descr.wBlocks)
-		* 1 << (xfer->wa->wa_descr->bRPipeBlockSize - 1);
-	/* Compute the segment size and make sure it is a multiple of
-	 * the maxpktsize (WUSB1.0[8.3.3.1])...not really too much of
-	 * a check (FIXME) */
-	if (xfer->seg_size < maxpktsize) {
-		dev_err(dev,
-			"HW BUG? seg_size %zu smaller than maxpktsize %zu\n",
-			xfer->seg_size, maxpktsize);
-		result = -EINVAL;
-		goto error;
-	}
-	xfer->seg_size = (xfer->seg_size / maxpktsize) * maxpktsize;
-	if ((rpipe->descr.bmAttribute & 0x3) == USB_ENDPOINT_XFER_ISOC) {
-		int index = 0;
-
-		xfer->segs = 0;
-		/*
-		 * loop over urb->number_of_packets to determine how many
-		 * xfer segments will be needed to send the isoc frames.
-		 */
-		while (index < urb->number_of_packets) {
-			int seg_size; /* don't care. */
-			index += __wa_seg_calculate_isoc_frame_count(xfer,
-					index, &seg_size);
-			++xfer->segs;
-		}
-	} else {
-		xfer->segs = DIV_ROUND_UP(urb->transfer_buffer_length,
-						xfer->seg_size);
-		if (xfer->segs == 0 && *pxfer_type == WA_XFER_TYPE_CTL)
-			xfer->segs = 1;
-	}
-
-	if (xfer->segs > WA_SEGS_MAX) {
-		dev_err(dev, "BUG? oops, number of segments %zu bigger than %d\n",
-			(urb->transfer_buffer_length/xfer->seg_size),
-			WA_SEGS_MAX);
-		result = -EINVAL;
-		goto error;
-	}
-error:
-	return result;
-}
-
-static void __wa_setup_isoc_packet_descr(
-		struct wa_xfer_packet_info_hwaiso *packet_desc,
-		struct wa_xfer *xfer,
-		struct wa_seg *seg) {
-	struct usb_iso_packet_descriptor *iso_frame_desc =
-		xfer->urb->iso_frame_desc;
-	int frame_index;
-
-	/* populate isoc packet descriptor. */
-	packet_desc->bPacketType = WA_XFER_ISO_PACKET_INFO;
-	packet_desc->wLength = cpu_to_le16(struct_size(packet_desc,
-					   PacketLength,
-					   seg->isoc_frame_count));
-	for (frame_index = 0; frame_index < seg->isoc_frame_count;
-		++frame_index) {
-		int offset_index = frame_index + seg->isoc_frame_offset;
-		packet_desc->PacketLength[frame_index] =
-			cpu_to_le16(iso_frame_desc[offset_index].length);
-	}
-}
-
-
-/* Fill in the common request header and xfer-type specific data. */
-static void __wa_xfer_setup_hdr0(struct wa_xfer *xfer,
-				 struct wa_xfer_hdr *xfer_hdr0,
-				 enum wa_xfer_type xfer_type,
-				 size_t xfer_hdr_size)
-{
-	struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-	struct wa_seg *seg = xfer->seg[0];
-
-	xfer_hdr0 = &seg->xfer_hdr;
-	xfer_hdr0->bLength = xfer_hdr_size;
-	xfer_hdr0->bRequestType = xfer_type;
-	xfer_hdr0->wRPipe = rpipe->descr.wRPipeIndex;
-	xfer_hdr0->dwTransferID = wa_xfer_id_le32(xfer);
-	xfer_hdr0->bTransferSegment = 0;
-	switch (xfer_type) {
-	case WA_XFER_TYPE_CTL: {
-		struct wa_xfer_ctl *xfer_ctl =
-			container_of(xfer_hdr0, struct wa_xfer_ctl, hdr);
-		xfer_ctl->bmAttribute = xfer->is_inbound ? 1 : 0;
-		memcpy(&xfer_ctl->baSetupData, xfer->urb->setup_packet,
-		       sizeof(xfer_ctl->baSetupData));
-		break;
-	}
-	case WA_XFER_TYPE_BI:
-		break;
-	case WA_XFER_TYPE_ISO: {
-		struct wa_xfer_hwaiso *xfer_iso =
-			container_of(xfer_hdr0, struct wa_xfer_hwaiso, hdr);
-		struct wa_xfer_packet_info_hwaiso *packet_desc =
-			((void *)xfer_iso) + xfer_hdr_size;
-
-		/* populate the isoc section of the transfer request. */
-		xfer_iso->dwNumOfPackets = cpu_to_le32(seg->isoc_frame_count);
-		/* populate isoc packet descriptor. */
-		__wa_setup_isoc_packet_descr(packet_desc, xfer, seg);
-		break;
-	}
-	default:
-		BUG();
-	};
-}
-
-/*
- * Callback for the OUT data phase of the segment request
- *
- * Check wa_seg_tr_cb(); most comments also apply here because this
- * function does almost the same thing and they work closely
- * together.
- *
- * If the seg request has failed but this DTO phase has succeeded,
- * wa_seg_tr_cb() has already failed the segment and moved the
- * status to WA_SEG_ERROR, so this will go through 'case 0' and
- * effectively do nothing.
- */
-static void wa_seg_dto_cb(struct urb *urb)
-{
-	struct wa_seg *seg = urb->context;
-	struct wa_xfer *xfer = seg->xfer;
-	struct wahc *wa;
-	struct device *dev;
-	struct wa_rpipe *rpipe;
-	unsigned long flags;
-	unsigned rpipe_ready = 0;
-	int data_send_done = 1, release_dto = 0, holding_dto = 0;
-	u8 done = 0;
-	int result;
-
-	/* free the sg if it was used. */
-	kfree(urb->sg);
-	urb->sg = NULL;
-
-	spin_lock_irqsave(&xfer->lock, flags);
-	wa = xfer->wa;
-	dev = &wa->usb_iface->dev;
-	if (usb_pipeisoc(xfer->urb->pipe)) {
-		/* Alereon HWA sends all isoc frames in a single transfer. */
-		if (wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC)
-			seg->isoc_frame_index += seg->isoc_frame_count;
-		else
-			seg->isoc_frame_index += 1;
-		if (seg->isoc_frame_index < seg->isoc_frame_count) {
-			data_send_done = 0;
-			holding_dto = 1; /* checked in error cases. */
-			/*
-			 * if this is the last isoc frame of the segment, we
-			 * can release DTO after sending this frame.
-			 */
-			if ((seg->isoc_frame_index + 1) >=
-				seg->isoc_frame_count)
-				release_dto = 1;
-		}
-		dev_dbg(dev, "xfer 0x%08X#%u: isoc frame = %d, holding_dto = %d, release_dto = %d.\n",
-			wa_xfer_id(xfer), seg->index, seg->isoc_frame_index,
-			holding_dto, release_dto);
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-
-	switch (urb->status) {
-	case 0:
-		spin_lock_irqsave(&xfer->lock, flags);
-		seg->result += urb->actual_length;
-		if (data_send_done) {
-			dev_dbg(dev, "xfer 0x%08X#%u: data out done (%zu bytes)\n",
-				wa_xfer_id(xfer), seg->index, seg->result);
-			if (seg->status < WA_SEG_PENDING)
-				seg->status = WA_SEG_PENDING;
-		} else {
-			/* should only hit this for isoc xfers. */
-			/*
-			 * Populate the dto URB with the next isoc frame buffer,
-			 * send the URB and release DTO if we no longer need it.
-			 */
-			 __wa_populate_dto_urb_isoc(xfer, seg,
-				seg->isoc_frame_offset + seg->isoc_frame_index);
-
-			/* resubmit the URB with the next isoc frame. */
-			/* take a ref on resubmit. */
-			wa_xfer_get(xfer);
-			result = usb_submit_urb(seg->dto_urb, GFP_ATOMIC);
-			if (result < 0) {
-				dev_err(dev, "xfer 0x%08X#%u: DTO submit failed: %d\n",
-				       wa_xfer_id(xfer), seg->index, result);
-				spin_unlock_irqrestore(&xfer->lock, flags);
-				goto error_dto_submit;
-			}
-		}
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (release_dto) {
-			__wa_dto_put(wa);
-			wa_check_for_delayed_rpipes(wa);
-		}
-		break;
-	case -ECONNRESET:	/* URB unlinked; no need to do anything */
-	case -ENOENT:		/* as it was done by the who unlinked us */
-		if (holding_dto) {
-			__wa_dto_put(wa);
-			wa_check_for_delayed_rpipes(wa);
-		}
-		break;
-	default:		/* Other errors ... */
-		dev_err(dev, "xfer 0x%08X#%u: data out error %d\n",
-			wa_xfer_id(xfer), seg->index, urb->status);
-		goto error_default;
-	}
-
-	/* taken when this URB was submitted. */
-	wa_xfer_put(xfer);
-	return;
-
-error_dto_submit:
-	/* taken on resubmit attempt. */
-	wa_xfer_put(xfer);
-error_default:
-	spin_lock_irqsave(&xfer->lock, flags);
-	rpipe = xfer->ep->hcpriv;
-	if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS,
-		    EDC_ERROR_TIMEFRAME)){
-		dev_err(dev, "DTO: URB max acceptable errors exceeded, resetting device\n");
-		wa_reset_all(wa);
-	}
-	if (seg->status != WA_SEG_ERROR) {
-		seg->result = urb->status;
-		__wa_xfer_abort(xfer);
-		rpipe_ready = rpipe_avail_inc(rpipe);
-		done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_ERROR);
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	if (holding_dto) {
-		__wa_dto_put(wa);
-		wa_check_for_delayed_rpipes(wa);
-	}
-	if (done)
-		wa_xfer_completion(xfer);
-	if (rpipe_ready)
-		wa_xfer_delayed_run(rpipe);
-	/* taken when this URB was submitted. */
-	wa_xfer_put(xfer);
-}
-
-/*
- * Callback for the isoc packet descriptor phase of the segment request
- *
- * Check wa_seg_tr_cb(); most comments also apply here because this
- * function does almost the same thing and they work closely
- * together.
- *
- * If the seg request has failed but this phase has succeeded,
- * wa_seg_tr_cb() has already failed the segment and moved the
- * status to WA_SEG_ERROR, so this will go through 'case 0' and
- * effectively do nothing.
- */
-static void wa_seg_iso_pack_desc_cb(struct urb *urb)
-{
-	struct wa_seg *seg = urb->context;
-	struct wa_xfer *xfer = seg->xfer;
-	struct wahc *wa;
-	struct device *dev;
-	struct wa_rpipe *rpipe;
-	unsigned long flags;
-	unsigned rpipe_ready = 0;
-	u8 done = 0;
-
-	switch (urb->status) {
-	case 0:
-		spin_lock_irqsave(&xfer->lock, flags);
-		wa = xfer->wa;
-		dev = &wa->usb_iface->dev;
-		dev_dbg(dev, "iso xfer %08X#%u: packet descriptor done\n",
-			wa_xfer_id(xfer), seg->index);
-		if (xfer->is_inbound && seg->status < WA_SEG_PENDING)
-			seg->status = WA_SEG_PENDING;
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		break;
-	case -ECONNRESET:	/* URB unlinked; no need to do anything */
-	case -ENOENT:		/* as it was done by the who unlinked us */
-		break;
-	default:		/* Other errors ... */
-		spin_lock_irqsave(&xfer->lock, flags);
-		wa = xfer->wa;
-		dev = &wa->usb_iface->dev;
-		rpipe = xfer->ep->hcpriv;
-		pr_err_ratelimited("iso xfer %08X#%u: packet descriptor error %d\n",
-				wa_xfer_id(xfer), seg->index, urb->status);
-		if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)){
-			dev_err(dev, "iso xfer: URB max acceptable errors exceeded, resetting device\n");
-			wa_reset_all(wa);
-		}
-		if (seg->status != WA_SEG_ERROR) {
-			usb_unlink_urb(seg->dto_urb);
-			seg->result = urb->status;
-			__wa_xfer_abort(xfer);
-			rpipe_ready = rpipe_avail_inc(rpipe);
-			done = __wa_xfer_mark_seg_as_done(xfer, seg,
-					WA_SEG_ERROR);
-		}
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (done)
-			wa_xfer_completion(xfer);
-		if (rpipe_ready)
-			wa_xfer_delayed_run(rpipe);
-	}
-	/* taken when this URB was submitted. */
-	wa_xfer_put(xfer);
-}
-
-/*
- * Callback for the segment request
- *
- * If successful transition state (unless already transitioned or
- * outbound transfer); otherwise, take a note of the error, mark this
- * segment done and try completion.
- *
- * Note we don't access until we are sure that the transfer hasn't
- * been cancelled (ECONNRESET, ENOENT), which could mean that
- * seg->xfer could be already gone.
- *
- * We have to check before setting the status to WA_SEG_PENDING
- * because sometimes the xfer result callback arrives before this
- * callback (geeeeeeze), so it might happen that we are already in
- * another state. As well, we don't set it if the transfer is not inbound,
- * as in that case, wa_seg_dto_cb will do it when the OUT data phase
- * finishes.
- */
-static void wa_seg_tr_cb(struct urb *urb)
-{
-	struct wa_seg *seg = urb->context;
-	struct wa_xfer *xfer = seg->xfer;
-	struct wahc *wa;
-	struct device *dev;
-	struct wa_rpipe *rpipe;
-	unsigned long flags;
-	unsigned rpipe_ready;
-	u8 done = 0;
-
-	switch (urb->status) {
-	case 0:
-		spin_lock_irqsave(&xfer->lock, flags);
-		wa = xfer->wa;
-		dev = &wa->usb_iface->dev;
-		dev_dbg(dev, "xfer %p ID 0x%08X#%u: request done\n",
-			xfer, wa_xfer_id(xfer), seg->index);
-		if (xfer->is_inbound &&
-			seg->status < WA_SEG_PENDING &&
-			!(usb_pipeisoc(xfer->urb->pipe)))
-			seg->status = WA_SEG_PENDING;
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		break;
-	case -ECONNRESET:	/* URB unlinked; no need to do anything */
-	case -ENOENT:		/* as it was done by the who unlinked us */
-		break;
-	default:		/* Other errors ... */
-		spin_lock_irqsave(&xfer->lock, flags);
-		wa = xfer->wa;
-		dev = &wa->usb_iface->dev;
-		rpipe = xfer->ep->hcpriv;
-		if (printk_ratelimit())
-			dev_err(dev, "xfer %p ID 0x%08X#%u: request error %d\n",
-				xfer, wa_xfer_id(xfer), seg->index,
-				urb->status);
-		if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)){
-			dev_err(dev, "DTO: URB max acceptable errors "
-				"exceeded, resetting device\n");
-			wa_reset_all(wa);
-		}
-		usb_unlink_urb(seg->isoc_pack_desc_urb);
-		usb_unlink_urb(seg->dto_urb);
-		seg->result = urb->status;
-		__wa_xfer_abort(xfer);
-		rpipe_ready = rpipe_avail_inc(rpipe);
-		done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_ERROR);
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (done)
-			wa_xfer_completion(xfer);
-		if (rpipe_ready)
-			wa_xfer_delayed_run(rpipe);
-	}
-	/* taken when this URB was submitted. */
-	wa_xfer_put(xfer);
-}
-
-/*
- * Allocate an SG list to store bytes_to_transfer bytes and copy the
- * subset of the in_sg that matches the buffer subset
- * we are about to transfer.
- */
-static struct scatterlist *wa_xfer_create_subset_sg(struct scatterlist *in_sg,
-	const unsigned int bytes_transferred,
-	const unsigned int bytes_to_transfer, int *out_num_sgs)
-{
-	struct scatterlist *out_sg;
-	unsigned int bytes_processed = 0, offset_into_current_page_data = 0,
-		nents;
-	struct scatterlist *current_xfer_sg = in_sg;
-	struct scatterlist *current_seg_sg, *last_seg_sg;
-
-	/* skip previously transferred pages. */
-	while ((current_xfer_sg) &&
-			(bytes_processed < bytes_transferred)) {
-		bytes_processed += current_xfer_sg->length;
-
-		/* advance the sg if current segment starts on or past the
-			next page. */
-		if (bytes_processed <= bytes_transferred)
-			current_xfer_sg = sg_next(current_xfer_sg);
-	}
-
-	/* the data for the current segment starts in current_xfer_sg.
-		calculate the offset. */
-	if (bytes_processed > bytes_transferred) {
-		offset_into_current_page_data = current_xfer_sg->length -
-			(bytes_processed - bytes_transferred);
-	}
-
-	/* calculate the number of pages needed by this segment. */
-	nents = DIV_ROUND_UP((bytes_to_transfer +
-		offset_into_current_page_data +
-		current_xfer_sg->offset),
-		PAGE_SIZE);
-
-	out_sg = kmalloc((sizeof(struct scatterlist) * nents), GFP_ATOMIC);
-	if (out_sg) {
-		sg_init_table(out_sg, nents);
-
-		/* copy the portion of the incoming SG that correlates to the
-		 * data to be transferred by this segment to the segment SG. */
-		last_seg_sg = current_seg_sg = out_sg;
-		bytes_processed = 0;
-
-		/* reset nents and calculate the actual number of sg entries
-			needed. */
-		nents = 0;
-		while ((bytes_processed < bytes_to_transfer) &&
-				current_seg_sg && current_xfer_sg) {
-			unsigned int page_len = min((current_xfer_sg->length -
-				offset_into_current_page_data),
-				(bytes_to_transfer - bytes_processed));
-
-			sg_set_page(current_seg_sg, sg_page(current_xfer_sg),
-				page_len,
-				current_xfer_sg->offset +
-				offset_into_current_page_data);
-
-			bytes_processed += page_len;
-
-			last_seg_sg = current_seg_sg;
-			current_seg_sg = sg_next(current_seg_sg);
-			current_xfer_sg = sg_next(current_xfer_sg);
-
-			/* only the first page may require additional offset. */
-			offset_into_current_page_data = 0;
-			nents++;
-		}
-
-		/* update num_sgs and terminate the list since we may have
-		 *  concatenated pages. */
-		sg_mark_end(last_seg_sg);
-		*out_num_sgs = nents;
-	}
-
-	return out_sg;
-}
-
-/*
- * Populate DMA buffer info for the isoc dto urb.
- */
-static void __wa_populate_dto_urb_isoc(struct wa_xfer *xfer,
-	struct wa_seg *seg, int curr_iso_frame)
-{
-	seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-	seg->dto_urb->sg = NULL;
-	seg->dto_urb->num_sgs = 0;
-	/* dto urb buffer address pulled from iso_frame_desc. */
-	seg->dto_urb->transfer_dma = xfer->urb->transfer_dma +
-		xfer->urb->iso_frame_desc[curr_iso_frame].offset;
-	/* The Alereon HWA sends a single URB with all isoc segs. */
-	if (xfer->wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC)
-		seg->dto_urb->transfer_buffer_length = seg->isoc_size;
-	else
-		seg->dto_urb->transfer_buffer_length =
-			xfer->urb->iso_frame_desc[curr_iso_frame].length;
-}
-
-/*
- * Populate buffer ptr and size, DMA buffer or SG list for the dto urb.
- */
-static int __wa_populate_dto_urb(struct wa_xfer *xfer,
-	struct wa_seg *seg, size_t buf_itr_offset, size_t buf_itr_size)
-{
-	int result = 0;
-
-	if (xfer->is_dma) {
-		seg->dto_urb->transfer_dma =
-			xfer->urb->transfer_dma + buf_itr_offset;
-		seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-		seg->dto_urb->sg = NULL;
-		seg->dto_urb->num_sgs = 0;
-	} else {
-		/* do buffer or SG processing. */
-		seg->dto_urb->transfer_flags &=
-			~URB_NO_TRANSFER_DMA_MAP;
-		/* this should always be 0 before a resubmit. */
-		seg->dto_urb->num_mapped_sgs = 0;
-
-		if (xfer->urb->transfer_buffer) {
-			seg->dto_urb->transfer_buffer =
-				xfer->urb->transfer_buffer +
-				buf_itr_offset;
-			seg->dto_urb->sg = NULL;
-			seg->dto_urb->num_sgs = 0;
-		} else {
-			seg->dto_urb->transfer_buffer = NULL;
-
-			/*
-			 * allocate an SG list to store seg_size bytes
-			 * and copy the subset of the xfer->urb->sg that
-			 * matches the buffer subset we are about to
-			 * read.
-			 */
-			seg->dto_urb->sg = wa_xfer_create_subset_sg(
-				xfer->urb->sg,
-				buf_itr_offset, buf_itr_size,
-				&(seg->dto_urb->num_sgs));
-			if (!(seg->dto_urb->sg))
-				result = -ENOMEM;
-		}
-	}
-	seg->dto_urb->transfer_buffer_length = buf_itr_size;
-
-	return result;
-}
-
-/*
- * Allocate the segs array and initialize each of them
- *
- * The segments are freed by wa_xfer_destroy() when the xfer use count
- * drops to zero; however, because each segment is given the same life
- * cycle as the USB URB it contains, it is actually freed by
- * usb_put_urb() on the contained USB URB (twisted, eh?).
- */
-static int __wa_xfer_setup_segs(struct wa_xfer *xfer, size_t xfer_hdr_size)
-{
-	int result, cnt, isoc_frame_offset = 0;
-	size_t alloc_size = sizeof(*xfer->seg[0])
-		- sizeof(xfer->seg[0]->xfer_hdr) + xfer_hdr_size;
-	struct usb_device *usb_dev = xfer->wa->usb_dev;
-	const struct usb_endpoint_descriptor *dto_epd = xfer->wa->dto_epd;
-	struct wa_seg *seg;
-	size_t buf_itr, buf_size, buf_itr_size;
-
-	result = -ENOMEM;
-	xfer->seg = kcalloc(xfer->segs, sizeof(xfer->seg[0]), GFP_ATOMIC);
-	if (xfer->seg == NULL)
-		goto error_segs_kzalloc;
-	buf_itr = 0;
-	buf_size = xfer->urb->transfer_buffer_length;
-	for (cnt = 0; cnt < xfer->segs; cnt++) {
-		size_t iso_pkt_descr_size = 0;
-		int seg_isoc_frame_count = 0, seg_isoc_size = 0;
-
-		/*
-		 * Adjust the size of the segment object to contain space for
-		 * the isoc packet descriptor buffer.
-		 */
-		if (usb_pipeisoc(xfer->urb->pipe)) {
-			seg_isoc_frame_count =
-				__wa_seg_calculate_isoc_frame_count(xfer,
-					isoc_frame_offset, &seg_isoc_size);
-
-			iso_pkt_descr_size =
-				sizeof(struct wa_xfer_packet_info_hwaiso) +
-				(seg_isoc_frame_count * sizeof(__le16));
-		}
-		result = -ENOMEM;
-		seg = xfer->seg[cnt] = kmalloc(alloc_size + iso_pkt_descr_size,
-						GFP_ATOMIC);
-		if (seg == NULL)
-			goto error_seg_kmalloc;
-		wa_seg_init(seg);
-		seg->xfer = xfer;
-		seg->index = cnt;
-		usb_fill_bulk_urb(&seg->tr_urb, usb_dev,
-				  usb_sndbulkpipe(usb_dev,
-						  dto_epd->bEndpointAddress),
-				  &seg->xfer_hdr, xfer_hdr_size,
-				  wa_seg_tr_cb, seg);
-		buf_itr_size = min(buf_size, xfer->seg_size);
-
-		if (usb_pipeisoc(xfer->urb->pipe)) {
-			seg->isoc_frame_count = seg_isoc_frame_count;
-			seg->isoc_frame_offset = isoc_frame_offset;
-			seg->isoc_size = seg_isoc_size;
-			/* iso packet descriptor. */
-			seg->isoc_pack_desc_urb =
-					usb_alloc_urb(0, GFP_ATOMIC);
-			if (seg->isoc_pack_desc_urb == NULL)
-				goto error_iso_pack_desc_alloc;
-			/*
-			 * The buffer for the isoc packet descriptor starts
-			 * after the transfer request header in the
-			 * segment object memory buffer.
-			 */
-			usb_fill_bulk_urb(
-				seg->isoc_pack_desc_urb, usb_dev,
-				usb_sndbulkpipe(usb_dev,
-					dto_epd->bEndpointAddress),
-				(void *)(&seg->xfer_hdr) +
-					xfer_hdr_size,
-				iso_pkt_descr_size,
-				wa_seg_iso_pack_desc_cb, seg);
-
-			/* adjust starting frame offset for next seg. */
-			isoc_frame_offset += seg_isoc_frame_count;
-		}
-
-		if (xfer->is_inbound == 0 && buf_size > 0) {
-			/* outbound data. */
-			seg->dto_urb = usb_alloc_urb(0, GFP_ATOMIC);
-			if (seg->dto_urb == NULL)
-				goto error_dto_alloc;
-			usb_fill_bulk_urb(
-				seg->dto_urb, usb_dev,
-				usb_sndbulkpipe(usb_dev,
-						dto_epd->bEndpointAddress),
-				NULL, 0, wa_seg_dto_cb, seg);
-
-			if (usb_pipeisoc(xfer->urb->pipe)) {
-				/*
-				 * Fill in the xfer buffer information for the
-				 * first isoc frame.  Subsequent frames in this
-				 * segment will be filled in and sent from the
-				 * DTO completion routine, if needed.
-				 */
-				__wa_populate_dto_urb_isoc(xfer, seg,
-					seg->isoc_frame_offset);
-			} else {
-				/* fill in the xfer buffer information. */
-				result = __wa_populate_dto_urb(xfer, seg,
-							buf_itr, buf_itr_size);
-				if (result < 0)
-					goto error_seg_outbound_populate;
-
-				buf_itr += buf_itr_size;
-				buf_size -= buf_itr_size;
-			}
-		}
-		seg->status = WA_SEG_READY;
-	}
-	return 0;
-
-	/*
-	 * Free the memory for the current segment which failed to init.
-	 * Use the fact that cnt is left at were it failed.  The remaining
-	 * segments will be cleaned up by wa_xfer_destroy.
-	 */
-error_seg_outbound_populate:
-	usb_free_urb(xfer->seg[cnt]->dto_urb);
-error_dto_alloc:
-	usb_free_urb(xfer->seg[cnt]->isoc_pack_desc_urb);
-error_iso_pack_desc_alloc:
-	kfree(xfer->seg[cnt]);
-	xfer->seg[cnt] = NULL;
-error_seg_kmalloc:
-error_segs_kzalloc:
-	return result;
-}
-
-/*
- * Allocates all the stuff needed to submit a transfer
- *
- * Breaks the whole data buffer in a list of segments, each one has a
- * structure allocated to it and linked in xfer->seg[index]
- *
- * FIXME: merge setup_segs() and the last part of this function, no
- *        need to do two for loops when we could run everything in a
- *        single one
- */
-static int __wa_xfer_setup(struct wa_xfer *xfer, struct urb *urb)
-{
-	int result;
-	struct device *dev = &xfer->wa->usb_iface->dev;
-	enum wa_xfer_type xfer_type = 0; /* shut up GCC */
-	size_t xfer_hdr_size, cnt, transfer_size;
-	struct wa_xfer_hdr *xfer_hdr0, *xfer_hdr;
-
-	result = __wa_xfer_setup_sizes(xfer, &xfer_type);
-	if (result < 0)
-		goto error_setup_sizes;
-	xfer_hdr_size = result;
-	result = __wa_xfer_setup_segs(xfer, xfer_hdr_size);
-	if (result < 0) {
-		dev_err(dev, "xfer %p: Failed to allocate %d segments: %d\n",
-			xfer, xfer->segs, result);
-		goto error_setup_segs;
-	}
-	/* Fill the first header */
-	xfer_hdr0 = &xfer->seg[0]->xfer_hdr;
-	wa_xfer_id_init(xfer);
-	__wa_xfer_setup_hdr0(xfer, xfer_hdr0, xfer_type, xfer_hdr_size);
-
-	/* Fill remaining headers */
-	xfer_hdr = xfer_hdr0;
-	if (xfer_type == WA_XFER_TYPE_ISO) {
-		xfer_hdr0->dwTransferLength =
-			cpu_to_le32(xfer->seg[0]->isoc_size);
-		for (cnt = 1; cnt < xfer->segs; cnt++) {
-			struct wa_xfer_packet_info_hwaiso *packet_desc;
-			struct wa_seg *seg = xfer->seg[cnt];
-			struct wa_xfer_hwaiso *xfer_iso;
-
-			xfer_hdr = &seg->xfer_hdr;
-			xfer_iso = container_of(xfer_hdr,
-						struct wa_xfer_hwaiso, hdr);
-			packet_desc = ((void *)xfer_hdr) + xfer_hdr_size;
-			/*
-			 * Copy values from the 0th header. Segment specific
-			 * values are set below.
-			 */
-			memcpy(xfer_hdr, xfer_hdr0, xfer_hdr_size);
-			xfer_hdr->bTransferSegment = cnt;
-			xfer_hdr->dwTransferLength =
-				cpu_to_le32(seg->isoc_size);
-			xfer_iso->dwNumOfPackets =
-					cpu_to_le32(seg->isoc_frame_count);
-			__wa_setup_isoc_packet_descr(packet_desc, xfer, seg);
-			seg->status = WA_SEG_READY;
-		}
-	} else {
-		transfer_size = urb->transfer_buffer_length;
-		xfer_hdr0->dwTransferLength = transfer_size > xfer->seg_size ?
-			cpu_to_le32(xfer->seg_size) :
-			cpu_to_le32(transfer_size);
-		transfer_size -=  xfer->seg_size;
-		for (cnt = 1; cnt < xfer->segs; cnt++) {
-			xfer_hdr = &xfer->seg[cnt]->xfer_hdr;
-			memcpy(xfer_hdr, xfer_hdr0, xfer_hdr_size);
-			xfer_hdr->bTransferSegment = cnt;
-			xfer_hdr->dwTransferLength =
-				transfer_size > xfer->seg_size ?
-					cpu_to_le32(xfer->seg_size)
-					: cpu_to_le32(transfer_size);
-			xfer->seg[cnt]->status = WA_SEG_READY;
-			transfer_size -=  xfer->seg_size;
-		}
-	}
-	xfer_hdr->bTransferSegment |= 0x80;	/* this is the last segment */
-	result = 0;
-error_setup_segs:
-error_setup_sizes:
-	return result;
-}
-
-/*
- *
- *
- * rpipe->seg_lock is held!
- */
-static int __wa_seg_submit(struct wa_rpipe *rpipe, struct wa_xfer *xfer,
-			   struct wa_seg *seg, int *dto_done)
-{
-	int result;
-
-	/* default to done unless we encounter a multi-frame isoc segment. */
-	*dto_done = 1;
-
-	/*
-	 * Take a ref for each segment urb so the xfer cannot disappear until
-	 * all of the callbacks run.
-	 */
-	wa_xfer_get(xfer);
-	/* submit the transfer request. */
-	seg->status = WA_SEG_SUBMITTED;
-	result = usb_submit_urb(&seg->tr_urb, GFP_ATOMIC);
-	if (result < 0) {
-		pr_err("%s: xfer %p#%u: REQ submit failed: %d\n",
-		       __func__, xfer, seg->index, result);
-		wa_xfer_put(xfer);
-		goto error_tr_submit;
-	}
-	/* submit the isoc packet descriptor if present. */
-	if (seg->isoc_pack_desc_urb) {
-		wa_xfer_get(xfer);
-		result = usb_submit_urb(seg->isoc_pack_desc_urb, GFP_ATOMIC);
-		seg->isoc_frame_index = 0;
-		if (result < 0) {
-			pr_err("%s: xfer %p#%u: ISO packet descriptor submit failed: %d\n",
-			       __func__, xfer, seg->index, result);
-			wa_xfer_put(xfer);
-			goto error_iso_pack_desc_submit;
-		}
-	}
-	/* submit the out data if this is an out request. */
-	if (seg->dto_urb) {
-		struct wahc *wa = xfer->wa;
-		wa_xfer_get(xfer);
-		result = usb_submit_urb(seg->dto_urb, GFP_ATOMIC);
-		if (result < 0) {
-			pr_err("%s: xfer %p#%u: DTO submit failed: %d\n",
-			       __func__, xfer, seg->index, result);
-			wa_xfer_put(xfer);
-			goto error_dto_submit;
-		}
-		/*
-		 * If this segment contains more than one isoc frame, hold
-		 * onto the dto resource until we send all frames.
-		 * Only applies to non-Alereon devices.
-		 */
-		if (((wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC) == 0)
-			&& (seg->isoc_frame_count > 1))
-			*dto_done = 0;
-	}
-	rpipe_avail_dec(rpipe);
-	return 0;
-
-error_dto_submit:
-	usb_unlink_urb(seg->isoc_pack_desc_urb);
-error_iso_pack_desc_submit:
-	usb_unlink_urb(&seg->tr_urb);
-error_tr_submit:
-	seg->status = WA_SEG_ERROR;
-	seg->result = result;
-	*dto_done = 1;
-	return result;
-}
-
-/*
- * Execute more queued request segments until the maximum concurrent allowed.
- * Return true if the DTO resource was acquired and released.
- *
- * The ugly unlock/lock sequence on the error path is needed as the
- * xfer->lock normally nests the seg_lock and not viceversa.
- */
-static int __wa_xfer_delayed_run(struct wa_rpipe *rpipe, int *dto_waiting)
-{
-	int result, dto_acquired = 0, dto_done = 0;
-	struct device *dev = &rpipe->wa->usb_iface->dev;
-	struct wa_seg *seg;
-	struct wa_xfer *xfer;
-	unsigned long flags;
-
-	*dto_waiting = 0;
-
-	spin_lock_irqsave(&rpipe->seg_lock, flags);
-	while (atomic_read(&rpipe->segs_available) > 0
-	      && !list_empty(&rpipe->seg_list)
-	      && (dto_acquired = __wa_dto_try_get(rpipe->wa))) {
-		seg = list_first_entry(&(rpipe->seg_list), struct wa_seg,
-				 list_node);
-		list_del(&seg->list_node);
-		xfer = seg->xfer;
-		/*
-		 * Get a reference to the xfer in case the callbacks for the
-		 * URBs submitted by __wa_seg_submit attempt to complete
-		 * the xfer before this function completes.
-		 */
-		wa_xfer_get(xfer);
-		result = __wa_seg_submit(rpipe, xfer, seg, &dto_done);
-		/* release the dto resource if this RPIPE is done with it. */
-		if (dto_done)
-			__wa_dto_put(rpipe->wa);
-		dev_dbg(dev, "xfer %p ID %08X#%u submitted from delayed [%d segments available] %d\n",
-			xfer, wa_xfer_id(xfer), seg->index,
-			atomic_read(&rpipe->segs_available), result);
-		if (unlikely(result < 0)) {
-			int done;
-
-			spin_unlock_irqrestore(&rpipe->seg_lock, flags);
-			spin_lock_irqsave(&xfer->lock, flags);
-			__wa_xfer_abort(xfer);
-			/*
-			 * This seg was marked as submitted when it was put on
-			 * the RPIPE seg_list.  Mark it done.
-			 */
-			xfer->segs_done++;
-			done = __wa_xfer_is_done(xfer);
-			spin_unlock_irqrestore(&xfer->lock, flags);
-			if (done)
-				wa_xfer_completion(xfer);
-			spin_lock_irqsave(&rpipe->seg_lock, flags);
-		}
-		wa_xfer_put(xfer);
-	}
-	/*
-	 * Mark this RPIPE as waiting if dto was not acquired, there are
-	 * delayed segs and no active transfers to wake us up later.
-	 */
-	if (!dto_acquired && !list_empty(&rpipe->seg_list)
-		&& (atomic_read(&rpipe->segs_available) ==
-			le16_to_cpu(rpipe->descr.wRequests)))
-		*dto_waiting = 1;
-
-	spin_unlock_irqrestore(&rpipe->seg_lock, flags);
-
-	return dto_done;
-}
-
-static void wa_xfer_delayed_run(struct wa_rpipe *rpipe)
-{
-	int dto_waiting;
-	int dto_done = __wa_xfer_delayed_run(rpipe, &dto_waiting);
-
-	/*
-	 * If this RPIPE is waiting on the DTO resource, add it to the tail of
-	 * the waiting list.
-	 * Otherwise, if the WA DTO resource was acquired and released by
-	 *  __wa_xfer_delayed_run, another RPIPE may have attempted to acquire
-	 * DTO and failed during that time.  Check the delayed list and process
-	 * any waiters.  Start searching from the next RPIPE index.
-	 */
-	if (dto_waiting)
-		wa_add_delayed_rpipe(rpipe->wa, rpipe);
-	else if (dto_done)
-		wa_check_for_delayed_rpipes(rpipe->wa);
-}
-
-/*
- *
- * xfer->lock is taken
- *
- * On failure submitting we just stop submitting and return error;
- * wa_urb_enqueue_b() will execute the completion path
- */
-static int __wa_xfer_submit(struct wa_xfer *xfer)
-{
-	int result, dto_acquired = 0, dto_done = 0, dto_waiting = 0;
-	struct wahc *wa = xfer->wa;
-	struct device *dev = &wa->usb_iface->dev;
-	unsigned cnt;
-	struct wa_seg *seg;
-	unsigned long flags;
-	struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-	size_t maxrequests = le16_to_cpu(rpipe->descr.wRequests);
-	u8 available;
-	u8 empty;
-
-	spin_lock_irqsave(&wa->xfer_list_lock, flags);
-	list_add_tail(&xfer->list_node, &wa->xfer_list);
-	spin_unlock_irqrestore(&wa->xfer_list_lock, flags);
-
-	BUG_ON(atomic_read(&rpipe->segs_available) > maxrequests);
-	result = 0;
-	spin_lock_irqsave(&rpipe->seg_lock, flags);
-	for (cnt = 0; cnt < xfer->segs; cnt++) {
-		int delay_seg = 1;
-
-		available = atomic_read(&rpipe->segs_available);
-		empty = list_empty(&rpipe->seg_list);
-		seg = xfer->seg[cnt];
-		if (available && empty) {
-			/*
-			 * Only attempt to acquire DTO if we have a segment
-			 * to send.
-			 */
-			dto_acquired = __wa_dto_try_get(rpipe->wa);
-			if (dto_acquired) {
-				delay_seg = 0;
-				result = __wa_seg_submit(rpipe, xfer, seg,
-							&dto_done);
-				dev_dbg(dev, "xfer %p ID 0x%08X#%u: available %u empty %u submitted\n",
-					xfer, wa_xfer_id(xfer), cnt, available,
-					empty);
-				if (dto_done)
-					__wa_dto_put(rpipe->wa);
-
-				if (result < 0) {
-					__wa_xfer_abort(xfer);
-					goto error_seg_submit;
-				}
-			}
-		}
-
-		if (delay_seg) {
-			dev_dbg(dev, "xfer %p ID 0x%08X#%u: available %u empty %u delayed\n",
-				xfer, wa_xfer_id(xfer), cnt, available,  empty);
-			seg->status = WA_SEG_DELAYED;
-			list_add_tail(&seg->list_node, &rpipe->seg_list);
-		}
-		xfer->segs_submitted++;
-	}
-error_seg_submit:
-	/*
-	 * Mark this RPIPE as waiting if dto was not acquired, there are
-	 * delayed segs and no active transfers to wake us up later.
-	 */
-	if (!dto_acquired && !list_empty(&rpipe->seg_list)
-		&& (atomic_read(&rpipe->segs_available) ==
-			le16_to_cpu(rpipe->descr.wRequests)))
-		dto_waiting = 1;
-	spin_unlock_irqrestore(&rpipe->seg_lock, flags);
-
-	if (dto_waiting)
-		wa_add_delayed_rpipe(rpipe->wa, rpipe);
-	else if (dto_done)
-		wa_check_for_delayed_rpipes(rpipe->wa);
-
-	return result;
-}
-
-/*
- * Second part of a URB/transfer enqueuement
- *
- * Assumes this comes from wa_urb_enqueue() [maybe through
- * wa_urb_enqueue_run()]. At this point:
- *
- * xfer->wa	filled and refcounted
- * xfer->ep	filled with rpipe refcounted if
- *              delayed == 0
- * xfer->urb 	filled and refcounted (this is the case when called
- *              from wa_urb_enqueue() as we come from usb_submit_urb()
- *              and when called by wa_urb_enqueue_run(), as we took an
- *              extra ref dropped by _run() after we return).
- * xfer->gfp	filled
- *
- * If we fail at __wa_xfer_submit(), then we just check if we are done
- * and if so, we run the completion procedure. However, if we are not
- * yet done, we do nothing and wait for the completion handlers from
- * the submitted URBs or from the xfer-result path to kick in. If xfer
- * result never kicks in, the xfer will timeout from the USB code and
- * dequeue() will be called.
- */
-static int wa_urb_enqueue_b(struct wa_xfer *xfer)
-{
-	int result;
-	unsigned long flags;
-	struct urb *urb = xfer->urb;
-	struct wahc *wa = xfer->wa;
-	struct wusbhc *wusbhc = wa->wusb;
-	struct wusb_dev *wusb_dev;
-	unsigned done;
-
-	result = rpipe_get_by_ep(wa, xfer->ep, urb, xfer->gfp);
-	if (result < 0) {
-		pr_err("%s: error_rpipe_get\n", __func__);
-		goto error_rpipe_get;
-	}
-	result = -ENODEV;
-	/* FIXME: segmentation broken -- kills DWA */
-	mutex_lock(&wusbhc->mutex);		/* get a WUSB dev */
-	if (urb->dev == NULL) {
-		mutex_unlock(&wusbhc->mutex);
-		pr_err("%s: error usb dev gone\n", __func__);
-		goto error_dev_gone;
-	}
-	wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev);
-	if (wusb_dev == NULL) {
-		mutex_unlock(&wusbhc->mutex);
-		dev_err(&(urb->dev->dev), "%s: error wusb dev gone\n",
-			__func__);
-		goto error_dev_gone;
-	}
-	mutex_unlock(&wusbhc->mutex);
-
-	spin_lock_irqsave(&xfer->lock, flags);
-	xfer->wusb_dev = wusb_dev;
-	result = urb->status;
-	if (urb->status != -EINPROGRESS) {
-		dev_err(&(urb->dev->dev), "%s: error_dequeued\n", __func__);
-		goto error_dequeued;
-	}
-
-	result = __wa_xfer_setup(xfer, urb);
-	if (result < 0) {
-		dev_err(&(urb->dev->dev), "%s: error_xfer_setup\n", __func__);
-		goto error_xfer_setup;
-	}
-	/*
-	 * Get a xfer reference since __wa_xfer_submit starts asynchronous
-	 * operations that may try to complete the xfer before this function
-	 * exits.
-	 */
-	wa_xfer_get(xfer);
-	result = __wa_xfer_submit(xfer);
-	if (result < 0) {
-		dev_err(&(urb->dev->dev), "%s: error_xfer_submit\n", __func__);
-		goto error_xfer_submit;
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	wa_xfer_put(xfer);
-	return 0;
-
-	/*
-	 * this is basically wa_xfer_completion() broken up wa_xfer_giveback()
-	 * does a wa_xfer_put() that will call wa_xfer_destroy() and undo
-	 * setup().
-	 */
-error_xfer_setup:
-error_dequeued:
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	/* FIXME: segmentation broken, kills DWA */
-	if (wusb_dev)
-		wusb_dev_put(wusb_dev);
-error_dev_gone:
-	rpipe_put(xfer->ep->hcpriv);
-error_rpipe_get:
-	xfer->result = result;
-	return result;
-
-error_xfer_submit:
-	done = __wa_xfer_is_done(xfer);
-	xfer->result = result;
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	if (done)
-		wa_xfer_completion(xfer);
-	wa_xfer_put(xfer);
-	/* return success since the completion routine will run. */
-	return 0;
-}
-
-/*
- * Execute the delayed transfers in the Wire Adapter @wa
- *
- * We need to be careful here, as dequeue() could be called in the
- * middle.  That's why we do the whole thing under the
- * wa->xfer_list_lock. If dequeue() jumps in, it first locks xfer->lock
- * and then checks the list -- so as we would be acquiring in inverse
- * order, we move the delayed list to a separate list while locked and then
- * submit them without the list lock held.
- */
-void wa_urb_enqueue_run(struct work_struct *ws)
-{
-	struct wahc *wa = container_of(ws, struct wahc, xfer_enqueue_work);
-	struct wa_xfer *xfer, *next;
-	struct urb *urb;
-	LIST_HEAD(tmp_list);
-
-	/* Create a copy of the wa->xfer_delayed_list while holding the lock */
-	spin_lock_irq(&wa->xfer_list_lock);
-	list_cut_position(&tmp_list, &wa->xfer_delayed_list,
-			wa->xfer_delayed_list.prev);
-	spin_unlock_irq(&wa->xfer_list_lock);
-
-	/*
-	 * enqueue from temp list without list lock held since wa_urb_enqueue_b
-	 * can take xfer->lock as well as lock mutexes.
-	 */
-	list_for_each_entry_safe(xfer, next, &tmp_list, list_node) {
-		list_del_init(&xfer->list_node);
-
-		urb = xfer->urb;
-		if (wa_urb_enqueue_b(xfer) < 0)
-			wa_xfer_giveback(xfer);
-		usb_put_urb(urb);	/* taken when queuing */
-	}
-}
-EXPORT_SYMBOL_GPL(wa_urb_enqueue_run);
-
-/*
- * Process the errored transfers on the Wire Adapter outside of interrupt.
- */
-void wa_process_errored_transfers_run(struct work_struct *ws)
-{
-	struct wahc *wa = container_of(ws, struct wahc, xfer_error_work);
-	struct wa_xfer *xfer, *next;
-	LIST_HEAD(tmp_list);
-
-	pr_info("%s: Run delayed STALL processing.\n", __func__);
-
-	/* Create a copy of the wa->xfer_errored_list while holding the lock */
-	spin_lock_irq(&wa->xfer_list_lock);
-	list_cut_position(&tmp_list, &wa->xfer_errored_list,
-			wa->xfer_errored_list.prev);
-	spin_unlock_irq(&wa->xfer_list_lock);
-
-	/*
-	 * run rpipe_clear_feature_stalled from temp list without list lock
-	 * held.
-	 */
-	list_for_each_entry_safe(xfer, next, &tmp_list, list_node) {
-		struct usb_host_endpoint *ep;
-		unsigned long flags;
-		struct wa_rpipe *rpipe;
-
-		spin_lock_irqsave(&xfer->lock, flags);
-		ep = xfer->ep;
-		rpipe = ep->hcpriv;
-		spin_unlock_irqrestore(&xfer->lock, flags);
-
-		/* clear RPIPE feature stalled without holding a lock. */
-		rpipe_clear_feature_stalled(wa, ep);
-
-		/* complete the xfer. This removes it from the tmp list. */
-		wa_xfer_completion(xfer);
-
-		/* check for work. */
-		wa_xfer_delayed_run(rpipe);
-	}
-}
-EXPORT_SYMBOL_GPL(wa_process_errored_transfers_run);
-
-/*
- * Submit a transfer to the Wire Adapter in a delayed way
- *
- * The process of enqueuing involves possible sleeps() [see
- * enqueue_b(), for the rpipe_get() and the mutex_lock()]. If we are
- * in an atomic section, we defer the enqueue_b() call--else we call direct.
- *
- * @urb: We own a reference to it done by the HCI Linux USB stack that
- *       will be given up by calling usb_hcd_giveback_urb() or by
- *       returning error from this function -> ergo we don't have to
- *       refcount it.
- */
-int wa_urb_enqueue(struct wahc *wa, struct usb_host_endpoint *ep,
-		   struct urb *urb, gfp_t gfp)
-{
-	int result;
-	struct device *dev = &wa->usb_iface->dev;
-	struct wa_xfer *xfer;
-	unsigned long my_flags;
-	unsigned cant_sleep = irqs_disabled() | in_atomic();
-
-	if ((urb->transfer_buffer == NULL)
-	    && (urb->sg == NULL)
-	    && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
-	    && urb->transfer_buffer_length != 0) {
-		dev_err(dev, "BUG? urb %p: NULL xfer buffer & NODMA\n", urb);
-		dump_stack();
-	}
-
-	spin_lock_irqsave(&wa->xfer_list_lock, my_flags);
-	result = usb_hcd_link_urb_to_ep(&(wa->wusb->usb_hcd), urb);
-	spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags);
-	if (result < 0)
-		goto error_link_urb;
-
-	result = -ENOMEM;
-	xfer = kzalloc(sizeof(*xfer), gfp);
-	if (xfer == NULL)
-		goto error_kmalloc;
-
-	result = -ENOENT;
-	if (urb->status != -EINPROGRESS)	/* cancelled */
-		goto error_dequeued;		/* before starting? */
-	wa_xfer_init(xfer);
-	xfer->wa = wa_get(wa);
-	xfer->urb = urb;
-	xfer->gfp = gfp;
-	xfer->ep = ep;
-	urb->hcpriv = xfer;
-
-	dev_dbg(dev, "xfer %p urb %p pipe 0x%02x [%d bytes] %s %s %s\n",
-		xfer, urb, urb->pipe, urb->transfer_buffer_length,
-		urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? "dma" : "nodma",
-		urb->pipe & USB_DIR_IN ? "inbound" : "outbound",
-		cant_sleep ? "deferred" : "inline");
-
-	if (cant_sleep) {
-		usb_get_urb(urb);
-		spin_lock_irqsave(&wa->xfer_list_lock, my_flags);
-		list_add_tail(&xfer->list_node, &wa->xfer_delayed_list);
-		spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags);
-		queue_work(wusbd, &wa->xfer_enqueue_work);
-	} else {
-		result = wa_urb_enqueue_b(xfer);
-		if (result < 0) {
-			/*
-			 * URB submit/enqueue failed.  Clean up, return an
-			 * error and do not run the callback.  This avoids
-			 * an infinite submit/complete loop.
-			 */
-			dev_err(dev, "%s: URB enqueue failed: %d\n",
-			   __func__, result);
-			wa_put(xfer->wa);
-			wa_xfer_put(xfer);
-			spin_lock_irqsave(&wa->xfer_list_lock, my_flags);
-			usb_hcd_unlink_urb_from_ep(&(wa->wusb->usb_hcd), urb);
-			spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags);
-			return result;
-		}
-	}
-	return 0;
-
-error_dequeued:
-	kfree(xfer);
-error_kmalloc:
-	spin_lock_irqsave(&wa->xfer_list_lock, my_flags);
-	usb_hcd_unlink_urb_from_ep(&(wa->wusb->usb_hcd), urb);
-	spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags);
-error_link_urb:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wa_urb_enqueue);
-
-/*
- * Dequeue a URB and make sure uwb_hcd_giveback_urb() [completion
- * handler] is called.
- *
- * Until a transfer goes successfully through wa_urb_enqueue() it
- * needs to be dequeued with completion calling; when stuck in delayed
- * or before wa_xfer_setup() is called, we need to do completion.
- *
- *  not setup  If there is no hcpriv yet, that means that that enqueue
- *             still had no time to set the xfer up. Because
- *             urb->status should be other than -EINPROGRESS,
- *             enqueue() will catch that and bail out.
- *
- * If the transfer has gone through setup, we just need to clean it
- * up. If it has gone through submit(), we have to abort it [with an
- * asynch request] and then make sure we cancel each segment.
- *
- */
-int wa_urb_dequeue(struct wahc *wa, struct urb *urb, int status)
-{
-	unsigned long flags;
-	struct wa_xfer *xfer;
-	struct wa_seg *seg;
-	struct wa_rpipe *rpipe;
-	unsigned cnt, done = 0, xfer_abort_pending;
-	unsigned rpipe_ready = 0;
-	int result;
-
-	/* check if it is safe to unlink. */
-	spin_lock_irqsave(&wa->xfer_list_lock, flags);
-	result = usb_hcd_check_unlink_urb(&(wa->wusb->usb_hcd), urb, status);
-	if ((result == 0) && urb->hcpriv) {
-		/*
-		 * Get a xfer ref to prevent a race with wa_xfer_giveback
-		 * cleaning up the xfer while we are working with it.
-		 */
-		wa_xfer_get(urb->hcpriv);
-	}
-	spin_unlock_irqrestore(&wa->xfer_list_lock, flags);
-	if (result)
-		return result;
-
-	xfer = urb->hcpriv;
-	if (xfer == NULL)
-		return -ENOENT;
-	spin_lock_irqsave(&xfer->lock, flags);
-	pr_debug("%s: DEQUEUE xfer id 0x%08X\n", __func__, wa_xfer_id(xfer));
-	rpipe = xfer->ep->hcpriv;
-	if (rpipe == NULL) {
-		pr_debug("%s: xfer %p id 0x%08X has no RPIPE.  %s",
-			__func__, xfer, wa_xfer_id(xfer),
-			"Probably already aborted.\n" );
-		result = -ENOENT;
-		goto out_unlock;
-	}
-	/*
-	 * Check for done to avoid racing with wa_xfer_giveback and completing
-	 * twice.
-	 */
-	if (__wa_xfer_is_done(xfer)) {
-		pr_debug("%s: xfer %p id 0x%08X already done.\n", __func__,
-			xfer, wa_xfer_id(xfer));
-		result = -ENOENT;
-		goto out_unlock;
-	}
-	/* Check the delayed list -> if there, release and complete */
-	spin_lock(&wa->xfer_list_lock);
-	if (!list_empty(&xfer->list_node) && xfer->seg == NULL)
-		goto dequeue_delayed;
-	spin_unlock(&wa->xfer_list_lock);
-	if (xfer->seg == NULL)  	/* still hasn't reached */
-		goto out_unlock;	/* setup(), enqueue_b() completes */
-	/* Ok, the xfer is in flight already, it's been setup and submitted.*/
-	xfer_abort_pending = __wa_xfer_abort(xfer) >= 0;
-	/*
-	 * grab the rpipe->seg_lock here to prevent racing with
-	 * __wa_xfer_delayed_run.
-	 */
-	spin_lock(&rpipe->seg_lock);
-	for (cnt = 0; cnt < xfer->segs; cnt++) {
-		seg = xfer->seg[cnt];
-		pr_debug("%s: xfer id 0x%08X#%d status = %d\n",
-			__func__, wa_xfer_id(xfer), cnt, seg->status);
-		switch (seg->status) {
-		case WA_SEG_NOTREADY:
-		case WA_SEG_READY:
-			printk(KERN_ERR "xfer %p#%u: dequeue bad state %u\n",
-			       xfer, cnt, seg->status);
-			WARN_ON(1);
-			break;
-		case WA_SEG_DELAYED:
-			/*
-			 * delete from rpipe delayed list.  If no segments on
-			 * this xfer have been submitted, __wa_xfer_is_done will
-			 * trigger a giveback below.  Otherwise, the submitted
-			 * segments will be completed in the DTI interrupt.
-			 */
-			seg->status = WA_SEG_ABORTED;
-			seg->result = -ENOENT;
-			list_del(&seg->list_node);
-			xfer->segs_done++;
-			break;
-		case WA_SEG_DONE:
-		case WA_SEG_ERROR:
-		case WA_SEG_ABORTED:
-			break;
-			/*
-			 * The buf_in data for a segment in the
-			 * WA_SEG_DTI_PENDING state is actively being read.
-			 * Let wa_buf_in_cb handle it since it will be called
-			 * and will increment xfer->segs_done.  Cleaning up
-			 * here could cause wa_buf_in_cb to access the xfer
-			 * after it has been completed/freed.
-			 */
-		case WA_SEG_DTI_PENDING:
-			break;
-			/*
-			 * In the states below, the HWA device already knows
-			 * about the transfer.  If an abort request was sent,
-			 * allow the HWA to process it and wait for the
-			 * results.  Otherwise, the DTI state and seg completed
-			 * counts can get out of sync.
-			 */
-		case WA_SEG_SUBMITTED:
-		case WA_SEG_PENDING:
-			/*
-			 * Check if the abort was successfully sent.  This could
-			 * be false if the HWA has been removed but we haven't
-			 * gotten the disconnect notification yet.
-			 */
-			if (!xfer_abort_pending) {
-				seg->status = WA_SEG_ABORTED;
-				rpipe_ready = rpipe_avail_inc(rpipe);
-				xfer->segs_done++;
-			}
-			break;
-		}
-	}
-	spin_unlock(&rpipe->seg_lock);
-	xfer->result = urb->status;	/* -ENOENT or -ECONNRESET */
-	done = __wa_xfer_is_done(xfer);
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	if (done)
-		wa_xfer_completion(xfer);
-	if (rpipe_ready)
-		wa_xfer_delayed_run(rpipe);
-	wa_xfer_put(xfer);
-	return result;
-
-out_unlock:
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	wa_xfer_put(xfer);
-	return result;
-
-dequeue_delayed:
-	list_del_init(&xfer->list_node);
-	spin_unlock(&wa->xfer_list_lock);
-	xfer->result = urb->status;
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	wa_xfer_giveback(xfer);
-	wa_xfer_put(xfer);
-	usb_put_urb(urb);		/* we got a ref in enqueue() */
-	return 0;
-}
-EXPORT_SYMBOL_GPL(wa_urb_dequeue);
-
-/*
- * Translation from WA status codes (WUSB1.0 Table 8.15) to errno
- * codes
- *
- * Positive errno values are internal inconsistencies and should be
- * flagged louder. Negative are to be passed up to the user in the
- * normal way.
- *
- * @status: USB WA status code -- high two bits are stripped.
- */
-static int wa_xfer_status_to_errno(u8 status)
-{
-	int errno;
-	u8 real_status = status;
-	static int xlat[] = {
-		[WA_XFER_STATUS_SUCCESS] = 		0,
-		[WA_XFER_STATUS_HALTED] = 		-EPIPE,
-		[WA_XFER_STATUS_DATA_BUFFER_ERROR] = 	-ENOBUFS,
-		[WA_XFER_STATUS_BABBLE] = 		-EOVERFLOW,
-		[WA_XFER_RESERVED] = 			EINVAL,
-		[WA_XFER_STATUS_NOT_FOUND] =		0,
-		[WA_XFER_STATUS_INSUFFICIENT_RESOURCE] = -ENOMEM,
-		[WA_XFER_STATUS_TRANSACTION_ERROR] = 	-EILSEQ,
-		[WA_XFER_STATUS_ABORTED] =		-ENOENT,
-		[WA_XFER_STATUS_RPIPE_NOT_READY] = 	EINVAL,
-		[WA_XFER_INVALID_FORMAT] = 		EINVAL,
-		[WA_XFER_UNEXPECTED_SEGMENT_NUMBER] = 	EINVAL,
-		[WA_XFER_STATUS_RPIPE_TYPE_MISMATCH] = 	EINVAL,
-	};
-	status &= 0x3f;
-
-	if (status == 0)
-		return 0;
-	if (status >= ARRAY_SIZE(xlat)) {
-		printk_ratelimited(KERN_ERR "%s(): BUG? "
-			       "Unknown WA transfer status 0x%02x\n",
-			       __func__, real_status);
-		return -EINVAL;
-	}
-	errno = xlat[status];
-	if (unlikely(errno > 0)) {
-		printk_ratelimited(KERN_ERR "%s(): BUG? "
-			       "Inconsistent WA status: 0x%02x\n",
-			       __func__, real_status);
-		errno = -errno;
-	}
-	return errno;
-}
-
-/*
- * If a last segment flag and/or a transfer result error is encountered,
- * no other segment transfer results will be returned from the device.
- * Mark the remaining submitted or pending xfers as completed so that
- * the xfer will complete cleanly.
- *
- * xfer->lock must be held
- *
- */
-static void wa_complete_remaining_xfer_segs(struct wa_xfer *xfer,
-		int starting_index, enum wa_seg_status status)
-{
-	int index;
-	struct wa_rpipe *rpipe = xfer->ep->hcpriv;
-
-	for (index = starting_index; index < xfer->segs_submitted; index++) {
-		struct wa_seg *current_seg = xfer->seg[index];
-
-		BUG_ON(current_seg == NULL);
-
-		switch (current_seg->status) {
-		case WA_SEG_SUBMITTED:
-		case WA_SEG_PENDING:
-		case WA_SEG_DTI_PENDING:
-			rpipe_avail_inc(rpipe);
-		/*
-		 * do not increment RPIPE avail for the WA_SEG_DELAYED case
-		 * since it has not been submitted to the RPIPE.
-		 */
-		/* fall through */
-		case WA_SEG_DELAYED:
-			xfer->segs_done++;
-			current_seg->status = status;
-			break;
-		case WA_SEG_ABORTED:
-			break;
-		default:
-			WARN(1, "%s: xfer 0x%08X#%d. bad seg status = %d\n",
-				__func__, wa_xfer_id(xfer), index,
-				current_seg->status);
-			break;
-		}
-	}
-}
-
-/* Populate the given urb based on the current isoc transfer state. */
-static int __wa_populate_buf_in_urb_isoc(struct wahc *wa,
-	struct urb *buf_in_urb, struct wa_xfer *xfer, struct wa_seg *seg)
-{
-	int urb_start_frame = seg->isoc_frame_index + seg->isoc_frame_offset;
-	int seg_index, total_len = 0, urb_frame_index = urb_start_frame;
-	struct usb_iso_packet_descriptor *iso_frame_desc =
-						xfer->urb->iso_frame_desc;
-	const int dti_packet_size = usb_endpoint_maxp(wa->dti_epd);
-	int next_frame_contiguous;
-	struct usb_iso_packet_descriptor *iso_frame;
-
-	BUG_ON(buf_in_urb->status == -EINPROGRESS);
-
-	/*
-	 * If the current frame actual_length is contiguous with the next frame
-	 * and actual_length is a multiple of the DTI endpoint max packet size,
-	 * combine the current frame with the next frame in a single URB.  This
-	 * reduces the number of URBs that must be submitted in that case.
-	 */
-	seg_index = seg->isoc_frame_index;
-	do {
-		next_frame_contiguous = 0;
-
-		iso_frame = &iso_frame_desc[urb_frame_index];
-		total_len += iso_frame->actual_length;
-		++urb_frame_index;
-		++seg_index;
-
-		if (seg_index < seg->isoc_frame_count) {
-			struct usb_iso_packet_descriptor *next_iso_frame;
-
-			next_iso_frame = &iso_frame_desc[urb_frame_index];
-
-			if ((iso_frame->offset + iso_frame->actual_length) ==
-				next_iso_frame->offset)
-				next_frame_contiguous = 1;
-		}
-	} while (next_frame_contiguous
-			&& ((iso_frame->actual_length % dti_packet_size) == 0));
-
-	/* this should always be 0 before a resubmit. */
-	buf_in_urb->num_mapped_sgs	= 0;
-	buf_in_urb->transfer_dma = xfer->urb->transfer_dma +
-		iso_frame_desc[urb_start_frame].offset;
-	buf_in_urb->transfer_buffer_length = total_len;
-	buf_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-	buf_in_urb->transfer_buffer = NULL;
-	buf_in_urb->sg = NULL;
-	buf_in_urb->num_sgs = 0;
-	buf_in_urb->context = seg;
-
-	/* return the number of frames included in this URB. */
-	return seg_index - seg->isoc_frame_index;
-}
-
-/* Populate the given urb based on the current transfer state. */
-static int wa_populate_buf_in_urb(struct urb *buf_in_urb, struct wa_xfer *xfer,
-	unsigned int seg_idx, unsigned int bytes_transferred)
-{
-	int result = 0;
-	struct wa_seg *seg = xfer->seg[seg_idx];
-
-	BUG_ON(buf_in_urb->status == -EINPROGRESS);
-	/* this should always be 0 before a resubmit. */
-	buf_in_urb->num_mapped_sgs	= 0;
-
-	if (xfer->is_dma) {
-		buf_in_urb->transfer_dma = xfer->urb->transfer_dma
-			+ (seg_idx * xfer->seg_size);
-		buf_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-		buf_in_urb->transfer_buffer = NULL;
-		buf_in_urb->sg = NULL;
-		buf_in_urb->num_sgs = 0;
-	} else {
-		/* do buffer or SG processing. */
-		buf_in_urb->transfer_flags &= ~URB_NO_TRANSFER_DMA_MAP;
-
-		if (xfer->urb->transfer_buffer) {
-			buf_in_urb->transfer_buffer =
-				xfer->urb->transfer_buffer
-				+ (seg_idx * xfer->seg_size);
-			buf_in_urb->sg = NULL;
-			buf_in_urb->num_sgs = 0;
-		} else {
-			/* allocate an SG list to store seg_size bytes
-				and copy the subset of the xfer->urb->sg
-				that matches the buffer subset we are
-				about to read. */
-			buf_in_urb->sg = wa_xfer_create_subset_sg(
-				xfer->urb->sg,
-				seg_idx * xfer->seg_size,
-				bytes_transferred,
-				&(buf_in_urb->num_sgs));
-
-			if (!(buf_in_urb->sg)) {
-				buf_in_urb->num_sgs	= 0;
-				result = -ENOMEM;
-			}
-			buf_in_urb->transfer_buffer = NULL;
-		}
-	}
-	buf_in_urb->transfer_buffer_length = bytes_transferred;
-	buf_in_urb->context = seg;
-
-	return result;
-}
-
-/*
- * Process a xfer result completion message
- *
- * inbound transfers: need to schedule a buf_in_urb read
- *
- * FIXME: this function needs to be broken up in parts
- */
-static void wa_xfer_result_chew(struct wahc *wa, struct wa_xfer *xfer,
-		struct wa_xfer_result *xfer_result)
-{
-	int result;
-	struct device *dev = &wa->usb_iface->dev;
-	unsigned long flags;
-	unsigned int seg_idx;
-	struct wa_seg *seg;
-	struct wa_rpipe *rpipe;
-	unsigned done = 0;
-	u8 usb_status;
-	unsigned rpipe_ready = 0;
-	unsigned bytes_transferred = le32_to_cpu(xfer_result->dwTransferLength);
-	struct urb *buf_in_urb = &(wa->buf_in_urbs[0]);
-
-	spin_lock_irqsave(&xfer->lock, flags);
-	seg_idx = xfer_result->bTransferSegment & 0x7f;
-	if (unlikely(seg_idx >= xfer->segs))
-		goto error_bad_seg;
-	seg = xfer->seg[seg_idx];
-	rpipe = xfer->ep->hcpriv;
-	usb_status = xfer_result->bTransferStatus;
-	dev_dbg(dev, "xfer %p ID 0x%08X#%u: bTransferStatus 0x%02x (seg status %u)\n",
-		xfer, wa_xfer_id(xfer), seg_idx, usb_status, seg->status);
-	if (seg->status == WA_SEG_ABORTED
-	    || seg->status == WA_SEG_ERROR)	/* already handled */
-		goto segment_aborted;
-	if (seg->status == WA_SEG_SUBMITTED)	/* ops, got here */
-		seg->status = WA_SEG_PENDING;	/* before wa_seg{_dto}_cb() */
-	if (seg->status != WA_SEG_PENDING) {
-		if (printk_ratelimit())
-			dev_err(dev, "xfer %p#%u: Bad segment state %u\n",
-				xfer, seg_idx, seg->status);
-		seg->status = WA_SEG_PENDING;	/* workaround/"fix" it */
-	}
-	if (usb_status & 0x80) {
-		seg->result = wa_xfer_status_to_errno(usb_status);
-		dev_err(dev, "DTI: xfer %p 0x%08X:#%u failed (0x%02x)\n",
-			xfer, xfer->id, seg->index, usb_status);
-		seg->status = ((usb_status & 0x7F) == WA_XFER_STATUS_ABORTED) ?
-			WA_SEG_ABORTED : WA_SEG_ERROR;
-		goto error_complete;
-	}
-	/* FIXME: we ignore warnings, tally them for stats */
-	if (usb_status & 0x40) 		/* Warning?... */
-		usb_status = 0;		/* ... pass */
-	/*
-	 * If the last segment bit is set, complete the remaining segments.
-	 * When the current segment is completed, either in wa_buf_in_cb for
-	 * transfers with data or below for no data, the xfer will complete.
-	 */
-	if (xfer_result->bTransferSegment & 0x80)
-		wa_complete_remaining_xfer_segs(xfer, seg->index + 1,
-			WA_SEG_DONE);
-	if (usb_pipeisoc(xfer->urb->pipe)
-		&& (le32_to_cpu(xfer_result->dwNumOfPackets) > 0)) {
-		/* set up WA state to read the isoc packet status next. */
-		wa->dti_isoc_xfer_in_progress = wa_xfer_id(xfer);
-		wa->dti_isoc_xfer_seg = seg_idx;
-		wa->dti_state = WA_DTI_ISOC_PACKET_STATUS_PENDING;
-	} else if (xfer->is_inbound && !usb_pipeisoc(xfer->urb->pipe)
-			&& (bytes_transferred > 0)) {
-		/* IN data phase: read to buffer */
-		seg->status = WA_SEG_DTI_PENDING;
-		result = wa_populate_buf_in_urb(buf_in_urb, xfer, seg_idx,
-			bytes_transferred);
-		if (result < 0)
-			goto error_buf_in_populate;
-		++(wa->active_buf_in_urbs);
-		result = usb_submit_urb(buf_in_urb, GFP_ATOMIC);
-		if (result < 0) {
-			--(wa->active_buf_in_urbs);
-			goto error_submit_buf_in;
-		}
-	} else {
-		/* OUT data phase or no data, complete it -- */
-		seg->result = bytes_transferred;
-		rpipe_ready = rpipe_avail_inc(rpipe);
-		done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_DONE);
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	if (done)
-		wa_xfer_completion(xfer);
-	if (rpipe_ready)
-		wa_xfer_delayed_run(rpipe);
-	return;
-
-error_submit_buf_in:
-	if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
-		dev_err(dev, "DTI: URB max acceptable errors "
-			"exceeded, resetting device\n");
-		wa_reset_all(wa);
-	}
-	if (printk_ratelimit())
-		dev_err(dev, "xfer %p#%u: can't submit DTI data phase: %d\n",
-			xfer, seg_idx, result);
-	seg->result = result;
-	kfree(buf_in_urb->sg);
-	buf_in_urb->sg = NULL;
-error_buf_in_populate:
-	__wa_xfer_abort(xfer);
-	seg->status = WA_SEG_ERROR;
-error_complete:
-	xfer->segs_done++;
-	rpipe_ready = rpipe_avail_inc(rpipe);
-	wa_complete_remaining_xfer_segs(xfer, seg->index + 1, seg->status);
-	done = __wa_xfer_is_done(xfer);
-	/*
-	 * queue work item to clear STALL for control endpoints.
-	 * Otherwise, let endpoint_reset take care of it.
-	 */
-	if (((usb_status & 0x3f) == WA_XFER_STATUS_HALTED) &&
-		usb_endpoint_xfer_control(&xfer->ep->desc) &&
-		done) {
-
-		dev_info(dev, "Control EP stall.  Queue delayed work.\n");
-		spin_lock(&wa->xfer_list_lock);
-		/* move xfer from xfer_list to xfer_errored_list. */
-		list_move_tail(&xfer->list_node, &wa->xfer_errored_list);
-		spin_unlock(&wa->xfer_list_lock);
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		queue_work(wusbd, &wa->xfer_error_work);
-	} else {
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (done)
-			wa_xfer_completion(xfer);
-		if (rpipe_ready)
-			wa_xfer_delayed_run(rpipe);
-	}
-
-	return;
-
-error_bad_seg:
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	wa_urb_dequeue(wa, xfer->urb, -ENOENT);
-	if (printk_ratelimit())
-		dev_err(dev, "xfer %p#%u: bad segment\n", xfer, seg_idx);
-	if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
-		dev_err(dev, "DTI: URB max acceptable errors "
-			"exceeded, resetting device\n");
-		wa_reset_all(wa);
-	}
-	return;
-
-segment_aborted:
-	/* nothing to do, as the aborter did the completion */
-	spin_unlock_irqrestore(&xfer->lock, flags);
-}
-
-/*
- * Process a isochronous packet status message
- *
- * inbound transfers: need to schedule a buf_in_urb read
- */
-static int wa_process_iso_packet_status(struct wahc *wa, struct urb *urb)
-{
-	struct device *dev = &wa->usb_iface->dev;
-	struct wa_xfer_packet_status_hwaiso *packet_status;
-	struct wa_xfer_packet_status_len_hwaiso *status_array;
-	struct wa_xfer *xfer;
-	unsigned long flags;
-	struct wa_seg *seg;
-	struct wa_rpipe *rpipe;
-	unsigned done = 0, dti_busy = 0, data_frame_count = 0, seg_index;
-	unsigned first_frame_index = 0, rpipe_ready = 0;
-	size_t expected_size;
-
-	/* We have a xfer result buffer; check it */
-	dev_dbg(dev, "DTI: isoc packet status %d bytes at %p\n",
-		urb->actual_length, urb->transfer_buffer);
-	packet_status = (struct wa_xfer_packet_status_hwaiso *)(wa->dti_buf);
-	if (packet_status->bPacketType != WA_XFER_ISO_PACKET_STATUS) {
-		dev_err(dev, "DTI Error: isoc packet status--bad type 0x%02x\n",
-			packet_status->bPacketType);
-		goto error_parse_buffer;
-	}
-	xfer = wa_xfer_get_by_id(wa, wa->dti_isoc_xfer_in_progress);
-	if (xfer == NULL) {
-		dev_err(dev, "DTI Error: isoc packet status--unknown xfer 0x%08x\n",
-			wa->dti_isoc_xfer_in_progress);
-		goto error_parse_buffer;
-	}
-	spin_lock_irqsave(&xfer->lock, flags);
-	if (unlikely(wa->dti_isoc_xfer_seg >= xfer->segs))
-		goto error_bad_seg;
-	seg = xfer->seg[wa->dti_isoc_xfer_seg];
-	rpipe = xfer->ep->hcpriv;
-	expected_size = struct_size(packet_status, PacketStatus,
-				    seg->isoc_frame_count);
-	if (urb->actual_length != expected_size) {
-		dev_err(dev, "DTI Error: isoc packet status--bad urb length (%d bytes vs %zu needed)\n",
-			urb->actual_length, expected_size);
-		goto error_bad_seg;
-	}
-	if (le16_to_cpu(packet_status->wLength) != expected_size) {
-		dev_err(dev, "DTI Error: isoc packet status--bad length %u\n",
-			le16_to_cpu(packet_status->wLength));
-		goto error_bad_seg;
-	}
-	/* write isoc packet status and lengths back to the xfer urb. */
-	status_array = packet_status->PacketStatus;
-	xfer->urb->start_frame =
-		wa->wusb->usb_hcd.driver->get_frame_number(&wa->wusb->usb_hcd);
-	for (seg_index = 0; seg_index < seg->isoc_frame_count; ++seg_index) {
-		struct usb_iso_packet_descriptor *iso_frame_desc =
-			xfer->urb->iso_frame_desc;
-		const int xfer_frame_index =
-			seg->isoc_frame_offset + seg_index;
-
-		iso_frame_desc[xfer_frame_index].status =
-			wa_xfer_status_to_errno(
-			le16_to_cpu(status_array[seg_index].PacketStatus));
-		iso_frame_desc[xfer_frame_index].actual_length =
-			le16_to_cpu(status_array[seg_index].PacketLength);
-		/* track the number of frames successfully transferred. */
-		if (iso_frame_desc[xfer_frame_index].actual_length > 0) {
-			/* save the starting frame index for buf_in_urb. */
-			if (!data_frame_count)
-				first_frame_index = seg_index;
-			++data_frame_count;
-		}
-	}
-
-	if (xfer->is_inbound && data_frame_count) {
-		int result, total_frames_read = 0, urb_index = 0;
-		struct urb *buf_in_urb;
-
-		/* IN data phase: read to buffer */
-		seg->status = WA_SEG_DTI_PENDING;
-
-		/* start with the first frame with data. */
-		seg->isoc_frame_index = first_frame_index;
-		/* submit up to WA_MAX_BUF_IN_URBS read URBs. */
-		do {
-			int urb_frame_index, urb_frame_count;
-			struct usb_iso_packet_descriptor *iso_frame_desc;
-
-			buf_in_urb = &(wa->buf_in_urbs[urb_index]);
-			urb_frame_count = __wa_populate_buf_in_urb_isoc(wa,
-				buf_in_urb, xfer, seg);
-			/* advance frame index to start of next read URB. */
-			seg->isoc_frame_index += urb_frame_count;
-			total_frames_read += urb_frame_count;
-
-			++(wa->active_buf_in_urbs);
-			result = usb_submit_urb(buf_in_urb, GFP_ATOMIC);
-
-			/* skip 0-byte frames. */
-			urb_frame_index =
-				seg->isoc_frame_offset + seg->isoc_frame_index;
-			iso_frame_desc =
-				&(xfer->urb->iso_frame_desc[urb_frame_index]);
-			while ((seg->isoc_frame_index <
-						seg->isoc_frame_count) &&
-				 (iso_frame_desc->actual_length == 0)) {
-				++(seg->isoc_frame_index);
-				++iso_frame_desc;
-			}
-			++urb_index;
-
-		} while ((result == 0) && (urb_index < WA_MAX_BUF_IN_URBS)
-				&& (seg->isoc_frame_index <
-						seg->isoc_frame_count));
-
-		if (result < 0) {
-			--(wa->active_buf_in_urbs);
-			dev_err(dev, "DTI Error: Could not submit buf in URB (%d)",
-				result);
-			wa_reset_all(wa);
-		} else if (data_frame_count > total_frames_read)
-			/* If we need to read more frames, set DTI busy. */
-			dti_busy = 1;
-	} else {
-		/* OUT transfer or no more IN data, complete it -- */
-		rpipe_ready = rpipe_avail_inc(rpipe);
-		done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_DONE);
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	if (dti_busy)
-		wa->dti_state = WA_DTI_BUF_IN_DATA_PENDING;
-	else
-		wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING;
-	if (done)
-		wa_xfer_completion(xfer);
-	if (rpipe_ready)
-		wa_xfer_delayed_run(rpipe);
-	wa_xfer_put(xfer);
-	return dti_busy;
-
-error_bad_seg:
-	spin_unlock_irqrestore(&xfer->lock, flags);
-	wa_xfer_put(xfer);
-error_parse_buffer:
-	return dti_busy;
-}
-
-/*
- * Callback for the IN data phase
- *
- * If successful transition state; otherwise, take a note of the
- * error, mark this segment done and try completion.
- *
- * Note we don't access until we are sure that the transfer hasn't
- * been cancelled (ECONNRESET, ENOENT), which could mean that
- * seg->xfer could be already gone.
- */
-static void wa_buf_in_cb(struct urb *urb)
-{
-	struct wa_seg *seg = urb->context;
-	struct wa_xfer *xfer = seg->xfer;
-	struct wahc *wa;
-	struct device *dev;
-	struct wa_rpipe *rpipe;
-	unsigned rpipe_ready = 0, isoc_data_frame_count = 0;
-	unsigned long flags;
-	int resubmit_dti = 0, active_buf_in_urbs;
-	u8 done = 0;
-
-	/* free the sg if it was used. */
-	kfree(urb->sg);
-	urb->sg = NULL;
-
-	spin_lock_irqsave(&xfer->lock, flags);
-	wa = xfer->wa;
-	dev = &wa->usb_iface->dev;
-	--(wa->active_buf_in_urbs);
-	active_buf_in_urbs = wa->active_buf_in_urbs;
-	rpipe = xfer->ep->hcpriv;
-
-	if (usb_pipeisoc(xfer->urb->pipe)) {
-		struct usb_iso_packet_descriptor *iso_frame_desc =
-			xfer->urb->iso_frame_desc;
-		int	seg_index;
-
-		/*
-		 * Find the next isoc frame with data and count how many
-		 * frames with data remain.
-		 */
-		seg_index = seg->isoc_frame_index;
-		while (seg_index < seg->isoc_frame_count) {
-			const int urb_frame_index =
-				seg->isoc_frame_offset + seg_index;
-
-			if (iso_frame_desc[urb_frame_index].actual_length > 0) {
-				/* save the index of the next frame with data */
-				if (!isoc_data_frame_count)
-					seg->isoc_frame_index = seg_index;
-				++isoc_data_frame_count;
-			}
-			++seg_index;
-		}
-	}
-	spin_unlock_irqrestore(&xfer->lock, flags);
-
-	switch (urb->status) {
-	case 0:
-		spin_lock_irqsave(&xfer->lock, flags);
-
-		seg->result += urb->actual_length;
-		if (isoc_data_frame_count > 0) {
-			int result, urb_frame_count;
-
-			/* submit a read URB for the next frame with data. */
-			urb_frame_count = __wa_populate_buf_in_urb_isoc(wa, urb,
-				 xfer, seg);
-			/* advance index to start of next read URB. */
-			seg->isoc_frame_index += urb_frame_count;
-			++(wa->active_buf_in_urbs);
-			result = usb_submit_urb(urb, GFP_ATOMIC);
-			if (result < 0) {
-				--(wa->active_buf_in_urbs);
-				dev_err(dev, "DTI Error: Could not submit buf in URB (%d)",
-					result);
-				wa_reset_all(wa);
-			}
-			/*
-			 * If we are in this callback and
-			 * isoc_data_frame_count > 0, it means that the dti_urb
-			 * submission was delayed in wa_dti_cb.  Once
-			 * we submit the last buf_in_urb, we can submit the
-			 * delayed dti_urb.
-			 */
-			  resubmit_dti = (isoc_data_frame_count ==
-							urb_frame_count);
-		} else if (active_buf_in_urbs == 0) {
-			dev_dbg(dev,
-				"xfer %p 0x%08X#%u: data in done (%zu bytes)\n",
-				xfer, wa_xfer_id(xfer), seg->index,
-				seg->result);
-			rpipe_ready = rpipe_avail_inc(rpipe);
-			done = __wa_xfer_mark_seg_as_done(xfer, seg,
-					WA_SEG_DONE);
-		}
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (done)
-			wa_xfer_completion(xfer);
-		if (rpipe_ready)
-			wa_xfer_delayed_run(rpipe);
-		break;
-	case -ECONNRESET:	/* URB unlinked; no need to do anything */
-	case -ENOENT:		/* as it was done by the who unlinked us */
-		break;
-	default:		/* Other errors ... */
-		/*
-		 * Error on data buf read.  Only resubmit DTI if it hasn't
-		 * already been done by previously hitting this error or by a
-		 * successful completion of the previous buf_in_urb.
-		 */
-		resubmit_dti = wa->dti_state != WA_DTI_TRANSFER_RESULT_PENDING;
-		spin_lock_irqsave(&xfer->lock, flags);
-		if (printk_ratelimit())
-			dev_err(dev, "xfer %p 0x%08X#%u: data in error %d\n",
-				xfer, wa_xfer_id(xfer), seg->index,
-				urb->status);
-		if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)){
-			dev_err(dev, "DTO: URB max acceptable errors "
-				"exceeded, resetting device\n");
-			wa_reset_all(wa);
-		}
-		seg->result = urb->status;
-		rpipe_ready = rpipe_avail_inc(rpipe);
-		if (active_buf_in_urbs == 0)
-			done = __wa_xfer_mark_seg_as_done(xfer, seg,
-				WA_SEG_ERROR);
-		else
-			__wa_xfer_abort(xfer);
-		spin_unlock_irqrestore(&xfer->lock, flags);
-		if (done)
-			wa_xfer_completion(xfer);
-		if (rpipe_ready)
-			wa_xfer_delayed_run(rpipe);
-	}
-
-	if (resubmit_dti) {
-		int result;
-
-		wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING;
-
-		result = usb_submit_urb(wa->dti_urb, GFP_ATOMIC);
-		if (result < 0) {
-			dev_err(dev, "DTI Error: Could not submit DTI URB (%d)\n",
-				result);
-			wa_reset_all(wa);
-		}
-	}
-}
-
-/*
- * Handle an incoming transfer result buffer
- *
- * Given a transfer result buffer, it completes the transfer (possibly
- * scheduling and buffer in read) and then resubmits the DTI URB for a
- * new transfer result read.
- *
- *
- * The xfer_result DTI URB state machine
- *
- * States: OFF | RXR (Read-Xfer-Result) | RBI (Read-Buffer-In)
- *
- * We start in OFF mode, the first xfer_result notification [through
- * wa_handle_notif_xfer()] moves us to RXR by posting the DTI-URB to
- * read.
- *
- * We receive a buffer -- if it is not a xfer_result, we complain and
- * repost the DTI-URB. If it is a xfer_result then do the xfer seg
- * request accounting. If it is an IN segment, we move to RBI and post
- * a BUF-IN-URB to the right buffer. The BUF-IN-URB callback will
- * repost the DTI-URB and move to RXR state. if there was no IN
- * segment, it will repost the DTI-URB.
- *
- * We go back to OFF when we detect a ENOENT or ESHUTDOWN (or too many
- * errors) in the URBs.
- */
-static void wa_dti_cb(struct urb *urb)
-{
-	int result, dti_busy = 0;
-	struct wahc *wa = urb->context;
-	struct device *dev = &wa->usb_iface->dev;
-	u32 xfer_id;
-	u8 usb_status;
-
-	BUG_ON(wa->dti_urb != urb);
-	switch (wa->dti_urb->status) {
-	case 0:
-		if (wa->dti_state == WA_DTI_TRANSFER_RESULT_PENDING) {
-			struct wa_xfer_result *xfer_result;
-			struct wa_xfer *xfer;
-
-			/* We have a xfer result buffer; check it */
-			dev_dbg(dev, "DTI: xfer result %d bytes at %p\n",
-				urb->actual_length, urb->transfer_buffer);
-			if (urb->actual_length != sizeof(*xfer_result)) {
-				dev_err(dev, "DTI Error: xfer result--bad size xfer result (%d bytes vs %zu needed)\n",
-					urb->actual_length,
-					sizeof(*xfer_result));
-				break;
-			}
-			xfer_result = (struct wa_xfer_result *)(wa->dti_buf);
-			if (xfer_result->hdr.bLength != sizeof(*xfer_result)) {
-				dev_err(dev, "DTI Error: xfer result--bad header length %u\n",
-					xfer_result->hdr.bLength);
-				break;
-			}
-			if (xfer_result->hdr.bNotifyType != WA_XFER_RESULT) {
-				dev_err(dev, "DTI Error: xfer result--bad header type 0x%02x\n",
-					xfer_result->hdr.bNotifyType);
-				break;
-			}
-			xfer_id = le32_to_cpu(xfer_result->dwTransferID);
-			usb_status = xfer_result->bTransferStatus & 0x3f;
-			if (usb_status == WA_XFER_STATUS_NOT_FOUND) {
-				/* taken care of already */
-				dev_dbg(dev, "%s: xfer 0x%08X#%u not found.\n",
-					__func__, xfer_id,
-					xfer_result->bTransferSegment & 0x7f);
-				break;
-			}
-			xfer = wa_xfer_get_by_id(wa, xfer_id);
-			if (xfer == NULL) {
-				/* FIXME: transaction not found. */
-				dev_err(dev, "DTI Error: xfer result--unknown xfer 0x%08x (status 0x%02x)\n",
-					xfer_id, usb_status);
-				break;
-			}
-			wa_xfer_result_chew(wa, xfer, xfer_result);
-			wa_xfer_put(xfer);
-		} else if (wa->dti_state == WA_DTI_ISOC_PACKET_STATUS_PENDING) {
-			dti_busy = wa_process_iso_packet_status(wa, urb);
-		} else {
-			dev_err(dev, "DTI Error: unexpected EP state = %d\n",
-				wa->dti_state);
-		}
-		break;
-	case -ENOENT:		/* (we killed the URB)...so, no broadcast */
-	case -ESHUTDOWN:	/* going away! */
-		dev_dbg(dev, "DTI: going down! %d\n", urb->status);
-		goto out;
-	default:
-		/* Unknown error */
-		if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "DTI: URB max acceptable errors "
-				"exceeded, resetting device\n");
-			wa_reset_all(wa);
-			goto out;
-		}
-		if (printk_ratelimit())
-			dev_err(dev, "DTI: URB error %d\n", urb->status);
-		break;
-	}
-
-	/* Resubmit the DTI URB if we are not busy processing isoc in frames. */
-	if (!dti_busy) {
-		result = usb_submit_urb(wa->dti_urb, GFP_ATOMIC);
-		if (result < 0) {
-			dev_err(dev, "DTI Error: Could not submit DTI URB (%d)\n",
-				result);
-			wa_reset_all(wa);
-		}
-	}
-out:
-	return;
-}
-
-/*
- * Initialize the DTI URB for reading transfer result notifications and also
- * the buffer-in URB, for reading buffers. Then we just submit the DTI URB.
- */
-int wa_dti_start(struct wahc *wa)
-{
-	const struct usb_endpoint_descriptor *dti_epd = wa->dti_epd;
-	struct device *dev = &wa->usb_iface->dev;
-	int result = -ENOMEM, index;
-
-	if (wa->dti_urb != NULL)	/* DTI URB already started */
-		goto out;
-
-	wa->dti_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (wa->dti_urb == NULL)
-		goto error_dti_urb_alloc;
-	usb_fill_bulk_urb(
-		wa->dti_urb, wa->usb_dev,
-		usb_rcvbulkpipe(wa->usb_dev, 0x80 | dti_epd->bEndpointAddress),
-		wa->dti_buf, wa->dti_buf_size,
-		wa_dti_cb, wa);
-
-	/* init the buf in URBs */
-	for (index = 0; index < WA_MAX_BUF_IN_URBS; ++index) {
-		usb_fill_bulk_urb(
-			&(wa->buf_in_urbs[index]), wa->usb_dev,
-			usb_rcvbulkpipe(wa->usb_dev,
-				0x80 | dti_epd->bEndpointAddress),
-			NULL, 0, wa_buf_in_cb, wa);
-	}
-	result = usb_submit_urb(wa->dti_urb, GFP_KERNEL);
-	if (result < 0) {
-		dev_err(dev, "DTI Error: Could not submit DTI URB (%d) resetting\n",
-			result);
-		goto error_dti_urb_submit;
-	}
-out:
-	return 0;
-
-error_dti_urb_submit:
-	usb_put_urb(wa->dti_urb);
-	wa->dti_urb = NULL;
-error_dti_urb_alloc:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wa_dti_start);
-/*
- * Transfer complete notification
- *
- * Called from the notif.c code. We get a notification on EP2 saying
- * that some endpoint has some transfer result data available. We are
- * about to read it.
- *
- * To speed up things, we always have a URB reading the DTI URB; we
- * don't really set it up and start it until the first xfer complete
- * notification arrives, which is what we do here.
- *
- * Follow up in wa_dti_cb(), as that's where the whole state
- * machine starts.
- *
- * @wa shall be referenced
- */
-void wa_handle_notif_xfer(struct wahc *wa, struct wa_notif_hdr *notif_hdr)
-{
-	struct device *dev = &wa->usb_iface->dev;
-	struct wa_notif_xfer *notif_xfer;
-	const struct usb_endpoint_descriptor *dti_epd = wa->dti_epd;
-
-	notif_xfer = container_of(notif_hdr, struct wa_notif_xfer, hdr);
-	BUG_ON(notif_hdr->bNotifyType != WA_NOTIF_TRANSFER);
-
-	if ((0x80 | notif_xfer->bEndpoint) != dti_epd->bEndpointAddress) {
-		/* FIXME: hardcoded limitation, adapt */
-		dev_err(dev, "BUG: DTI ep is %u, not %u (hack me)\n",
-			notif_xfer->bEndpoint, dti_epd->bEndpointAddress);
-		goto error;
-	}
-
-	/* attempt to start the DTI ep processing. */
-	if (wa_dti_start(wa) < 0)
-		goto error;
-
-	return;
-
-error:
-	wa_reset_all(wa);
-}
diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c
deleted file mode 100644
index d0b404d258e8..000000000000
--- a/drivers/usb/wusbcore/wusbhc.c
+++ /dev/null
@@ -1,490 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * sysfs glue, wusbcore module support and life cycle management
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * Creation/destruction of wusbhc is split in two parts; that that
- * doesn't require the HCD to be added (wusbhc_{create,destroy}) and
- * the one that requires (phase B, wusbhc_b_{create,destroy}).
- *
- * This is so because usb_add_hcd() will start the HC, and thus, all
- * the HC specific stuff has to be already initialized (like sysfs
- * thingies).
- */
-#include <linux/device.h>
-#include <linux/module.h>
-#include "wusbhc.h"
-
-/**
- * Extract the wusbhc that corresponds to a USB Host Controller class device
- *
- * WARNING! Apply only if @dev is that of a
- *          wusbhc.usb_hcd.self->class_dev; otherwise, you loose.
- */
-static struct wusbhc *usbhc_dev_to_wusbhc(struct device *dev)
-{
-	struct usb_bus *usb_bus = dev_get_drvdata(dev);
-	struct usb_hcd *usb_hcd = bus_to_hcd(usb_bus);
-	return usb_hcd_to_wusbhc(usb_hcd);
-}
-
-/*
- * Show & store the current WUSB trust timeout
- *
- * We don't do locking--it is an 'atomic' value.
- *
- * The units that we store/show are always MILLISECONDS. However, the
- * value of trust_timeout is jiffies.
- */
-static ssize_t wusb_trust_timeout_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-
-	return scnprintf(buf, PAGE_SIZE, "%u\n", wusbhc->trust_timeout);
-}
-
-static ssize_t wusb_trust_timeout_store(struct device *dev,
-					struct device_attribute *attr,
-					const char *buf, size_t size)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	ssize_t result = -ENOSYS;
-	unsigned trust_timeout;
-
-	result = sscanf(buf, "%u", &trust_timeout);
-	if (result != 1) {
-		result = -EINVAL;
-		goto out;
-	}
-	wusbhc->trust_timeout = min_t(unsigned, trust_timeout, 500);
-	cancel_delayed_work(&wusbhc->keep_alive_timer);
-	flush_workqueue(wusbd);
-	queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
-			   msecs_to_jiffies(wusbhc->trust_timeout / 2));
-out:
-	return result < 0 ? result : size;
-}
-static DEVICE_ATTR_RW(wusb_trust_timeout);
-
-/*
- * Show the current WUSB CHID.
- */
-static ssize_t wusb_chid_show(struct device *dev,
-			      struct device_attribute *attr, char *buf)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	const struct wusb_ckhdid *chid;
-
-	if (wusbhc->wuie_host_info != NULL)
-		chid = &wusbhc->wuie_host_info->CHID;
-	else
-		chid = &wusb_ckhdid_zero;
-
-	return sprintf(buf, "%16ph\n", chid->data);
-}
-
-/*
- * Store a new CHID.
- *
- * - Write an all zeros CHID and it will stop the controller
- * - Write a non-zero CHID and it will start it.
- *
- * See wusbhc_chid_set() for more info.
- */
-static ssize_t wusb_chid_store(struct device *dev,
-			       struct device_attribute *attr,
-			       const char *buf, size_t size)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	struct wusb_ckhdid chid;
-	ssize_t result;
-
-	result = sscanf(buf,
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx\n",
-			&chid.data[0] , &chid.data[1] ,
-			&chid.data[2] , &chid.data[3] ,
-			&chid.data[4] , &chid.data[5] ,
-			&chid.data[6] , &chid.data[7] ,
-			&chid.data[8] , &chid.data[9] ,
-			&chid.data[10], &chid.data[11],
-			&chid.data[12], &chid.data[13],
-			&chid.data[14], &chid.data[15]);
-	if (result != 16) {
-		dev_err(dev, "Unrecognized CHID (need 16 8-bit hex digits): "
-			"%d\n", (int)result);
-		return -EINVAL;
-	}
-	result = wusbhc_chid_set(wusbhc, &chid);
-	return result < 0 ? result : size;
-}
-static DEVICE_ATTR_RW(wusb_chid);
-
-
-static ssize_t wusb_phy_rate_show(struct device *dev,
-				  struct device_attribute *attr,
-				  char *buf)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-
-	return sprintf(buf, "%d\n", wusbhc->phy_rate);
-}
-
-static ssize_t wusb_phy_rate_store(struct device *dev,
-				   struct device_attribute *attr,
-				   const char *buf, size_t size)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	uint8_t phy_rate;
-	ssize_t result;
-
-	result = sscanf(buf, "%hhu", &phy_rate);
-	if (result != 1)
-		return -EINVAL;
-	if (phy_rate >= UWB_PHY_RATE_INVALID)
-		return -EINVAL;
-
-	wusbhc->phy_rate = phy_rate;
-	return size;
-}
-static DEVICE_ATTR_RW(wusb_phy_rate);
-
-static ssize_t wusb_dnts_show(struct device *dev,
-				  struct device_attribute *attr,
-				  char *buf)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-
-	return sprintf(buf, "num slots: %d\ninterval: %dms\n",
-			wusbhc->dnts_num_slots, wusbhc->dnts_interval);
-}
-
-static ssize_t wusb_dnts_store(struct device *dev,
-				   struct device_attribute *attr,
-				   const char *buf, size_t size)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	uint8_t num_slots, interval;
-	ssize_t result;
-
-	result = sscanf(buf, "%hhu %hhu", &num_slots, &interval);
-
-	if (result != 2)
-		return -EINVAL;
-
-	wusbhc->dnts_num_slots = num_slots;
-	wusbhc->dnts_interval = interval;
-
-	return size;
-}
-static DEVICE_ATTR_RW(wusb_dnts);
-
-static ssize_t wusb_retry_count_show(struct device *dev,
-				  struct device_attribute *attr,
-				  char *buf)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-
-	return sprintf(buf, "%d\n", wusbhc->retry_count);
-}
-
-static ssize_t wusb_retry_count_store(struct device *dev,
-				   struct device_attribute *attr,
-				   const char *buf, size_t size)
-{
-	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
-	uint8_t retry_count;
-	ssize_t result;
-
-	result = sscanf(buf, "%hhu", &retry_count);
-
-	if (result != 1)
-		return -EINVAL;
-
-	wusbhc->retry_count = max_t(uint8_t, retry_count,
-					WUSB_RETRY_COUNT_MAX);
-
-	return size;
-}
-static DEVICE_ATTR_RW(wusb_retry_count);
-
-/* Group all the WUSBHC attributes */
-static struct attribute *wusbhc_attrs[] = {
-		&dev_attr_wusb_trust_timeout.attr,
-		&dev_attr_wusb_chid.attr,
-		&dev_attr_wusb_phy_rate.attr,
-		&dev_attr_wusb_dnts.attr,
-		&dev_attr_wusb_retry_count.attr,
-		NULL,
-};
-
-static const struct attribute_group wusbhc_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = wusbhc_attrs,
-};
-
-/*
- * Create a wusbhc instance
- *
- * NOTEs:
- *
- *  - assumes *wusbhc has been zeroed and wusbhc->usb_hcd has been
- *    initialized but not added.
- *
- *  - fill out ports_max, mmcies_max and mmcie_{add,rm} before calling.
- *
- *  - fill out wusbhc->uwb_rc and refcount it before calling
- *  - fill out the wusbhc->sec_modes array
- */
-int wusbhc_create(struct wusbhc *wusbhc)
-{
-	int result = 0;
-
-	/* set defaults.  These can be overwritten using sysfs attributes. */
-	wusbhc->trust_timeout = WUSB_TRUST_TIMEOUT_MS;
-	wusbhc->phy_rate = UWB_PHY_RATE_INVALID - 1;
-	wusbhc->dnts_num_slots = 4;
-	wusbhc->dnts_interval = 2;
-	wusbhc->retry_count = WUSB_RETRY_COUNT_INFINITE;
-
-	mutex_init(&wusbhc->mutex);
-	result = wusbhc_mmcie_create(wusbhc);
-	if (result < 0)
-		goto error_mmcie_create;
-	result = wusbhc_devconnect_create(wusbhc);
-	if (result < 0)
-		goto error_devconnect_create;
-	result = wusbhc_rh_create(wusbhc);
-	if (result < 0)
-		goto error_rh_create;
-	result = wusbhc_sec_create(wusbhc);
-	if (result < 0)
-		goto error_sec_create;
-	return 0;
-
-error_sec_create:
-	wusbhc_rh_destroy(wusbhc);
-error_rh_create:
-	wusbhc_devconnect_destroy(wusbhc);
-error_devconnect_create:
-	wusbhc_mmcie_destroy(wusbhc);
-error_mmcie_create:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_create);
-
-static inline struct kobject *wusbhc_kobj(struct wusbhc *wusbhc)
-{
-	return &wusbhc->usb_hcd.self.controller->kobj;
-}
-
-/*
- * Phase B of a wusbhc instance creation
- *
- * Creates fields that depend on wusbhc->usb_hcd having been
- * added. This is where we create the sysfs files in
- * /sys/class/usb_host/usb_hostX/.
- *
- * NOTE: Assumes wusbhc->usb_hcd has been already added by the upper
- *       layer (hwahc or whci)
- */
-int wusbhc_b_create(struct wusbhc *wusbhc)
-{
-	int result = 0;
-	struct device *dev = wusbhc->usb_hcd.self.controller;
-
-	result = sysfs_create_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
-	if (result < 0) {
-		dev_err(dev, "Cannot register WUSBHC attributes: %d\n",
-			result);
-		goto error_create_attr_group;
-	}
-
-	return 0;
-error_create_attr_group:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_b_create);
-
-void wusbhc_b_destroy(struct wusbhc *wusbhc)
-{
-	wusbhc_pal_unregister(wusbhc);
-	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
-}
-EXPORT_SYMBOL_GPL(wusbhc_b_destroy);
-
-void wusbhc_destroy(struct wusbhc *wusbhc)
-{
-	wusbhc_sec_destroy(wusbhc);
-	wusbhc_rh_destroy(wusbhc);
-	wusbhc_devconnect_destroy(wusbhc);
-	wusbhc_mmcie_destroy(wusbhc);
-}
-EXPORT_SYMBOL_GPL(wusbhc_destroy);
-
-struct workqueue_struct *wusbd;
-EXPORT_SYMBOL_GPL(wusbd);
-
-/*
- * WUSB Cluster ID allocation map
- *
- * Each WUSB bus in a channel is identified with a Cluster Id in the
- * unauth address pace (WUSB1.0[4.3]). We take the range 0xe0 to 0xff
- * (that's space for 31 WUSB controllers, as 0xff can't be taken). We
- * start taking from 0xff, 0xfe, 0xfd... (hence the += or -= 0xff).
- *
- * For each one we taken, we pin it in the bitap
- */
-#define CLUSTER_IDS 32
-static DECLARE_BITMAP(wusb_cluster_id_table, CLUSTER_IDS);
-static DEFINE_SPINLOCK(wusb_cluster_ids_lock);
-
-/*
- * Get a WUSB Cluster ID
- *
- * Need to release with wusb_cluster_id_put() when done w/ it.
- */
-/* FIXME: coordinate with the choose_addres() from the USB stack */
-/* we want to leave the top of the 128 range for cluster addresses and
- * the bottom for device addresses (as we map them one on one with
- * ports). */
-u8 wusb_cluster_id_get(void)
-{
-	u8 id;
-	spin_lock(&wusb_cluster_ids_lock);
-	id = find_first_zero_bit(wusb_cluster_id_table, CLUSTER_IDS);
-	if (id >= CLUSTER_IDS) {
-		id = 0;
-		goto out;
-	}
-	set_bit(id, wusb_cluster_id_table);
-	id = (u8) 0xff - id;
-out:
-	spin_unlock(&wusb_cluster_ids_lock);
-	return id;
-
-}
-EXPORT_SYMBOL_GPL(wusb_cluster_id_get);
-
-/*
- * Release a WUSB Cluster ID
- *
- * Obtained it with wusb_cluster_id_get()
- */
-void wusb_cluster_id_put(u8 id)
-{
-	id = 0xff - id;
-	BUG_ON(id >= CLUSTER_IDS);
-	spin_lock(&wusb_cluster_ids_lock);
-	WARN_ON(!test_bit(id, wusb_cluster_id_table));
-	clear_bit(id, wusb_cluster_id_table);
-	spin_unlock(&wusb_cluster_ids_lock);
-}
-EXPORT_SYMBOL_GPL(wusb_cluster_id_put);
-
-/**
- * wusbhc_giveback_urb - return an URB to the USB core
- * @wusbhc: the host controller the URB is from.
- * @urb:    the URB.
- * @status: the URB's status.
- *
- * Return an URB to the USB core doing some additional WUSB specific
- * processing.
- *
- *  - After a successful transfer, update the trust timeout timestamp
- *    for the WUSB device.
- *
- *  - [WUSB] sections 4.13 and 7.5.1 specify the stop retransmission
- *    condition for the WCONNECTACK_IE is that the host has observed
- *    the associated device responding to a control transfer.
- */
-void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb, int status)
-{
-	struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc,
-					urb->dev);
-
-	if (status == 0 && wusb_dev) {
-		wusb_dev->entry_ts = jiffies;
-
-		/* wusbhc_devconnect_acked() can't be called from
-		   atomic context so defer it to a work queue. */
-		if (!list_empty(&wusb_dev->cack_node))
-			queue_work(wusbd, &wusb_dev->devconnect_acked_work);
-		else
-			wusb_dev_put(wusb_dev);
-	}
-
-	usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status);
-}
-EXPORT_SYMBOL_GPL(wusbhc_giveback_urb);
-
-/**
- * wusbhc_reset_all - reset the HC hardware
- * @wusbhc: the host controller to reset.
- *
- * Request a full hardware reset of the chip.  This will also reset
- * the radio controller and any other PALs.
- */
-void wusbhc_reset_all(struct wusbhc *wusbhc)
-{
-	if (wusbhc->uwb_rc)
-		uwb_rc_reset_all(wusbhc->uwb_rc);
-}
-EXPORT_SYMBOL_GPL(wusbhc_reset_all);
-
-static struct notifier_block wusb_usb_notifier = {
-	.notifier_call = wusb_usb_ncb,
-	.priority = INT_MAX	/* Need to be called first of all */
-};
-
-static int __init wusbcore_init(void)
-{
-	int result;
-	result = wusb_crypto_init();
-	if (result < 0)
-		goto error_crypto_init;
-	/* WQ is singlethread because we need to serialize notifications */
-	wusbd = create_singlethread_workqueue("wusbd");
-	if (wusbd == NULL) {
-		result = -ENOMEM;
-		printk(KERN_ERR "WUSB-core: Cannot create wusbd workqueue\n");
-		goto error_wusbd_create;
-	}
-	usb_register_notify(&wusb_usb_notifier);
-	bitmap_zero(wusb_cluster_id_table, CLUSTER_IDS);
-	set_bit(0, wusb_cluster_id_table);	/* reserve Cluster ID 0xff */
-	return 0;
-
-error_wusbd_create:
-	wusb_crypto_exit();
-error_crypto_init:
-	return result;
-
-}
-module_init(wusbcore_init);
-
-static void __exit wusbcore_exit(void)
-{
-	clear_bit(0, wusb_cluster_id_table);
-	if (!bitmap_empty(wusb_cluster_id_table, CLUSTER_IDS)) {
-		printk(KERN_ERR "BUG: WUSB Cluster IDs not released on exit: %*pb\n",
-		       CLUSTER_IDS, wusb_cluster_id_table);
-		WARN_ON(1);
-	}
-	usb_unregister_notify(&wusb_usb_notifier);
-	destroy_workqueue(wusbd);
-	wusb_crypto_exit();
-}
-module_exit(wusbcore_exit);
-
-MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
-MODULE_DESCRIPTION("Wireless USB core");
-MODULE_LICENSE("GPL");
diff --git a/drivers/usb/wusbcore/wusbhc.h b/drivers/usb/wusbcore/wusbhc.h
deleted file mode 100644
index 7681d796ca5b..000000000000
--- a/drivers/usb/wusbcore/wusbhc.h
+++ /dev/null
@@ -1,487 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * Common infrastructure for WHCI and HWA WUSB-HC drivers
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * This driver implements parts common to all Wireless USB Host
- * Controllers (struct wusbhc, embedding a struct usb_hcd) and is used
- * by:
- *
- *   - hwahc: HWA, USB-dongle that implements a Wireless USB host
- *     controller, (Wireless USB 1.0 Host-Wire-Adapter specification).
- *
- *   - whci: WHCI, a PCI card with a wireless host controller
- *     (Wireless Host Controller Interface 1.0 specification).
- *
- * Check out the Design-overview.txt file in the source documentation
- * for other details on the implementation.
- *
- * Main blocks:
- *
- *  rh         Root Hub emulation (part of the HCD glue)
- *
- *  devconnect Handle all the issues related to device connection,
- *             authentication, disconnection, timeout, reseting,
- *             keepalives, etc.
- *
- *  mmc        MMC IE broadcasting handling
- *
- * A host controller driver just initializes its stuff and as part of
- * that, creates a 'struct wusbhc' instance that handles all the
- * common WUSB mechanisms. Links in the function ops that are specific
- * to it and then registers the host controller. Ready to run.
- */
-
-#ifndef __WUSBHC_H__
-#define __WUSBHC_H__
-
-#include <linux/usb.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/kref.h>
-#include <linux/workqueue.h>
-#include <linux/usb/hcd.h>
-#include <linux/uwb.h>
-#include <linux/usb/wusb.h>
-
-/*
- * Time from a WUSB channel stop request to the last transmitted MMC.
- *
- * This needs to be > 4.096 ms in case no MMCs can be transmitted in
- * zone 0.
- */
-#define WUSB_CHANNEL_STOP_DELAY_MS 8
-#define WUSB_RETRY_COUNT_MAX 15
-#define WUSB_RETRY_COUNT_INFINITE 0
-
-/**
- * Wireless USB device
- *
- * Describe a WUSB device connected to the cluster. This struct
- * belongs to the 'struct wusb_port' it is attached to and it is
- * responsible for putting and clearing the pointer to it.
- *
- * Note this "complements" the 'struct usb_device' that the usb_hcd
- * keeps for each connected USB device. However, it extends some
- * information that is not available (there is no hcpriv ptr in it!)
- * *and* most importantly, it's life cycle is different. It is created
- * as soon as we get a DN_Connect (connect request notification) from
- * the device through the WUSB host controller; the USB stack doesn't
- * create the device until we authenticate it. FIXME: this will
- * change.
- *
- * @bos:    This is allocated when the BOS descriptors are read from
- *          the device and freed upon the wusb_dev struct dying.
- * @wusb_cap_descr: points into @bos, and has been verified to be size
- *                  safe.
- */
-struct wusb_dev {
-	struct kref refcnt;
-	struct wusbhc *wusbhc;
-	struct list_head cack_node;	/* Connect-Ack list */
-	struct list_head rekey_node;	/* GTK rekey list */
-	u8 port_idx;
-	u8 addr;
-	u8 beacon_type:4;
-	struct usb_encryption_descriptor ccm1_etd;
-	struct wusb_ckhdid cdid;
-	unsigned long entry_ts;
-	struct usb_bos_descriptor *bos;
-	struct usb_wireless_cap_descriptor *wusb_cap_descr;
-	struct uwb_mas_bm availability;
-	struct work_struct devconnect_acked_work;
-	struct usb_device *usb_dev;
-};
-
-#define WUSB_DEV_ADDR_UNAUTH 0x80
-
-static inline void wusb_dev_init(struct wusb_dev *wusb_dev)
-{
-	kref_init(&wusb_dev->refcnt);
-	/* no need to init the cack_node */
-}
-
-extern void wusb_dev_destroy(struct kref *_wusb_dev);
-
-static inline struct wusb_dev *wusb_dev_get(struct wusb_dev *wusb_dev)
-{
-	kref_get(&wusb_dev->refcnt);
-	return wusb_dev;
-}
-
-static inline void wusb_dev_put(struct wusb_dev *wusb_dev)
-{
-	kref_put(&wusb_dev->refcnt, wusb_dev_destroy);
-}
-
-/**
- * Wireless USB Host Controller root hub "fake" ports
- * (state and device information)
- *
- * Wireless USB is wireless, so there are no ports; but we
- * fake'em. Each RC can connect a max of devices at the same time
- * (given in the Wireless Adapter descriptor, bNumPorts or WHCI's
- * caps), referred to in wusbhc->ports_max.
- *
- * See rh.c for more information.
- *
- * The @status and @change use the same bits as in USB2.0[11.24.2.7],
- * so we don't have to do much when getting the port's status.
- *
- * WUSB1.0[7.1], USB2.0[11.24.2.7.1,fig 11-10],
- * include/linux/usb_ch9.h (#define USB_PORT_STAT_*)
- */
-struct wusb_port {
-	u16 status;
-	u16 change;
-	struct wusb_dev *wusb_dev;	/* connected device's info */
-	u32 ptk_tkid;
-};
-
-/**
- * WUSB Host Controller specifics
- *
- * All fields that are common to all Wireless USB controller types
- * (HWA and WHCI) are grouped here. Host Controller
- * functions/operations that only deal with general Wireless USB HC
- * issues use this data type to refer to the host.
- *
- * @usb_hcd	   Instantiation of a USB host controller
- *                 (initialized by upper layer [HWA=HC or WHCI].
- *
- * @dev		   Device that implements this; initialized by the
- *                 upper layer (HWA-HC, WHCI...); this device should
- *                 have a refcount.
- *
- * @trust_timeout  After this time without hearing for device
- *                 activity, we consider the device gone and we have to
- *                 re-authenticate.
- *
- *                 Can be accessed w/o locking--however, read to a
- *                 local variable then use.
- *
- * @chid           WUSB Cluster Host ID: this is supposed to be a
- *                 unique value that doesn't change across reboots (so
- *                 that your devices do not require re-association).
- *
- *                 Read/Write protected by @mutex
- *
- * @dev_info       This array has ports_max elements. It is used to
- *                 give the HC information about the WUSB devices (see
- *                 'struct wusb_dev_info').
- *
- *	           For HWA we need to allocate it in heap; for WHCI it
- *                 needs to be permanently mapped, so we keep it for
- *                 both and make it easy. Call wusbhc->dev_info_set()
- *                 to update an entry.
- *
- * @ports_max	   Number of simultaneous device connections (fake
- *                 ports) this HC will take. Read-only.
- *
- * @port	   Array of port status for each fake root port. Guaranteed to
- *                 always be the same length during device existence
- *                 [this allows for some unlocked but referenced reading].
- *
- * @mmcies_max	   Max number of Information Elements this HC can send
- *                 in its MMC. Read-only.
- *
- * @start          Start the WUSB channel.
- *
- * @stop           Stop the WUSB channel after the specified number of
- *                 milliseconds.  Channel Stop IEs should be transmitted
- *                 as required by [WUSB] 4.16.2.1.
- *
- * @mmcie_add	   HC specific operation (WHCI or HWA) for adding an
- *                 MMCIE.
- *
- * @mmcie_rm	   HC specific operation (WHCI or HWA) for removing an
- *                 MMCIE.
- *
- * @set_ptk:       Set the PTK and enable encryption for a device. Or, if
- *                 the supplied key is NULL, disable encryption for that
- *                 device.
- *
- * @set_gtk:       Set the GTK to be used for all future broadcast packets
- *                 (i.e., MMCs).  With some hardware, setting the GTK may start
- *                 MMC transmission.
- *
- * NOTE:
- *
- *  - If wusb_dev->usb_dev is not NULL, then usb_dev is valid
- *    (wusb_dev has a refcount on it). Likewise, if usb_dev->wusb_dev
- *    is not NULL, usb_dev->wusb_dev is valid (usb_dev keeps a
- *    refcount on it).
- *
- *    Most of the times when you need to use it, it will be non-NULL,
- *    so there is no real need to check for it (wusb_dev will
- *    disappear before usb_dev).
- *
- *  - The following fields need to be filled out before calling
- *    wusbhc_create(): ports_max, mmcies_max, mmcie_{add,rm}.
- *
- *  - there is no wusbhc_init() method, we do everything in
- *    wusbhc_create().
- *
- *  - Creation is done in two phases, wusbhc_create() and
- *    wusbhc_create_b(); b are the parts that need to be called after
- *    calling usb_hcd_add(&wusbhc->usb_hcd).
- */
-struct wusbhc {
-	struct usb_hcd usb_hcd;		/* HAS TO BE 1st */
-	struct device *dev;
-	struct uwb_rc *uwb_rc;
-	struct uwb_pal pal;
-
-	unsigned trust_timeout;			/* in jiffies */
-	struct wusb_ckhdid chid;
-	uint8_t phy_rate;
-	uint8_t dnts_num_slots;
-	uint8_t dnts_interval;
-	uint8_t retry_count;
-	struct wuie_host_info *wuie_host_info;
-
-	struct mutex mutex;			/* locks everything else */
-	u16 cluster_id;				/* Wireless USB Cluster ID */
-	struct wusb_port *port;			/* Fake port status handling */
-	struct wusb_dev_info *dev_info;		/* for Set Device Info mgmt */
-	u8 ports_max;
-	unsigned active:1;			/* currently xmit'ing MMCs */
-	struct wuie_keep_alive keep_alive_ie;	/* protected by mutex */
-	struct delayed_work keep_alive_timer;
-	struct list_head cack_list;		/* Connect acknowledging */
-	size_t cack_count;			/* protected by 'mutex' */
-	struct wuie_connect_ack cack_ie;
-	struct uwb_rsv *rsv;		/* cluster bandwidth reservation */
-
-	struct mutex mmcie_mutex;		/* MMC WUIE handling */
-	struct wuie_hdr **mmcie;		/* WUIE array */
-	u8 mmcies_max;
-	/* FIXME: make wusbhc_ops? */
-	int (*start)(struct wusbhc *wusbhc);
-	void (*stop)(struct wusbhc *wusbhc, int delay);
-	int (*mmcie_add)(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
-			 u8 handle, struct wuie_hdr *wuie);
-	int (*mmcie_rm)(struct wusbhc *wusbhc, u8 handle);
-	int (*dev_info_set)(struct wusbhc *, struct wusb_dev *wusb_dev);
-	int (*bwa_set)(struct wusbhc *wusbhc, s8 stream_index,
-		       const struct uwb_mas_bm *);
-	int (*set_ptk)(struct wusbhc *wusbhc, u8 port_idx,
-		       u32 tkid, const void *key, size_t key_size);
-	int (*set_gtk)(struct wusbhc *wusbhc,
-		       u32 tkid, const void *key, size_t key_size);
-	int (*set_num_dnts)(struct wusbhc *wusbhc, u8 interval, u8 slots);
-
-	struct {
-		struct usb_key_descriptor descr;
-		u8 data[16];				/* GTK key data */
-	} __attribute__((packed)) gtk;
-	u8 gtk_index;
-	u32 gtk_tkid;
-
-	/* workqueue for WUSB security related tasks. */
-	struct workqueue_struct *wq_security;
-	struct work_struct gtk_rekey_work;
-
-	struct usb_encryption_descriptor *ccm1_etd;
-};
-
-#define usb_hcd_to_wusbhc(u) container_of((u), struct wusbhc, usb_hcd)
-
-
-extern int wusbhc_create(struct wusbhc *);
-extern int wusbhc_b_create(struct wusbhc *);
-extern void wusbhc_b_destroy(struct wusbhc *);
-extern void wusbhc_destroy(struct wusbhc *);
-extern int wusb_dev_sysfs_add(struct wusbhc *, struct usb_device *,
-			      struct wusb_dev *);
-extern void wusb_dev_sysfs_rm(struct wusb_dev *);
-extern int wusbhc_sec_create(struct wusbhc *);
-extern int wusbhc_sec_start(struct wusbhc *);
-extern void wusbhc_sec_stop(struct wusbhc *);
-extern void wusbhc_sec_destroy(struct wusbhc *);
-extern void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb,
-				int status);
-void wusbhc_reset_all(struct wusbhc *wusbhc);
-
-int wusbhc_pal_register(struct wusbhc *wusbhc);
-void wusbhc_pal_unregister(struct wusbhc *wusbhc);
-
-/*
- * Return @usb_dev's @usb_hcd (properly referenced) or NULL if gone
- *
- * @usb_dev: USB device, UNLOCKED and referenced (or otherwise, safe ptr)
- *
- * This is a safe assumption as @usb_dev->bus is referenced all the
- * time during the @usb_dev life cycle.
- */
-static inline
-struct usb_hcd *usb_hcd_get_by_usb_dev(struct usb_device *usb_dev)
-{
-	struct usb_hcd *usb_hcd;
-	usb_hcd = bus_to_hcd(usb_dev->bus);
-	return usb_get_hcd(usb_hcd);
-}
-
-/*
- * Increment the reference count on a wusbhc.
- *
- * @wusbhc's life cycle is identical to that of the underlying usb_hcd.
- */
-static inline struct wusbhc *wusbhc_get(struct wusbhc *wusbhc)
-{
-	return usb_get_hcd(&wusbhc->usb_hcd) ? wusbhc : NULL;
-}
-
-/*
- * Return the wusbhc associated to a @usb_dev
- *
- * @usb_dev: USB device, UNLOCKED and referenced (or otherwise, safe ptr)
- *
- * @returns: wusbhc for @usb_dev; NULL if the @usb_dev is being torn down.
- *           WARNING: referenced at the usb_hcd level, unlocked
- *
- * FIXME: move offline
- */
-static inline struct wusbhc *wusbhc_get_by_usb_dev(struct usb_device *usb_dev)
-{
-	struct wusbhc *wusbhc = NULL;
-	struct usb_hcd *usb_hcd;
-	if (usb_dev->devnum > 1 && !usb_dev->wusb) {
-		/* but root hubs */
-		dev_err(&usb_dev->dev, "devnum %d wusb %d\n", usb_dev->devnum,
-			usb_dev->wusb);
-		BUG_ON(usb_dev->devnum > 1 && !usb_dev->wusb);
-	}
-	usb_hcd = usb_hcd_get_by_usb_dev(usb_dev);
-	if (usb_hcd == NULL)
-		return NULL;
-	BUG_ON(usb_hcd->wireless == 0);
-	return wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-}
-
-
-static inline void wusbhc_put(struct wusbhc *wusbhc)
-{
-	usb_put_hcd(&wusbhc->usb_hcd);
-}
-
-int wusbhc_start(struct wusbhc *wusbhc);
-void wusbhc_stop(struct wusbhc *wusbhc);
-extern int wusbhc_chid_set(struct wusbhc *, const struct wusb_ckhdid *);
-
-/* Device connect handling */
-extern int wusbhc_devconnect_create(struct wusbhc *);
-extern void wusbhc_devconnect_destroy(struct wusbhc *);
-extern int wusbhc_devconnect_start(struct wusbhc *wusbhc);
-extern void wusbhc_devconnect_stop(struct wusbhc *wusbhc);
-extern void wusbhc_handle_dn(struct wusbhc *, u8 srcaddr,
-			     struct wusb_dn_hdr *dn_hdr, size_t size);
-extern void __wusbhc_dev_disable(struct wusbhc *wusbhc, u8 port);
-extern int wusb_usb_ncb(struct notifier_block *nb, unsigned long val,
-			void *priv);
-extern int wusb_set_dev_addr(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
-			     u8 addr);
-
-/* Wireless USB fake Root Hub methods */
-extern int wusbhc_rh_create(struct wusbhc *);
-extern void wusbhc_rh_destroy(struct wusbhc *);
-
-extern int wusbhc_rh_status_data(struct usb_hcd *, char *);
-extern int wusbhc_rh_control(struct usb_hcd *, u16, u16, u16, char *, u16);
-extern int wusbhc_rh_start_port_reset(struct usb_hcd *, unsigned);
-
-/* MMC handling */
-extern int wusbhc_mmcie_create(struct wusbhc *);
-extern void wusbhc_mmcie_destroy(struct wusbhc *);
-extern int wusbhc_mmcie_set(struct wusbhc *, u8 interval, u8 repeat_cnt,
-			    struct wuie_hdr *);
-extern void wusbhc_mmcie_rm(struct wusbhc *, struct wuie_hdr *);
-
-/* Bandwidth reservation */
-int wusbhc_rsv_establish(struct wusbhc *wusbhc);
-void wusbhc_rsv_terminate(struct wusbhc *wusbhc);
-
-/*
- * I've always said
- * I wanted a wedding in a church...
- *
- * but lately I've been thinking about
- * the Botanical Gardens.
- *
- * We could do it by the tulips.
- * It'll be beautiful
- *
- * --Security!
- */
-extern int wusb_dev_sec_add(struct wusbhc *, struct usb_device *,
-				struct wusb_dev *);
-extern void wusb_dev_sec_rm(struct wusb_dev *) ;
-extern int wusb_dev_4way_handshake(struct wusbhc *, struct wusb_dev *,
-				   struct wusb_ckhdid *ck);
-void wusbhc_gtk_rekey(struct wusbhc *wusbhc);
-int wusb_dev_update_address(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev);
-
-
-/* WUSB Cluster ID handling */
-extern u8 wusb_cluster_id_get(void);
-extern void wusb_cluster_id_put(u8);
-
-/*
- * wusb_port_by_idx - return the port associated to a zero-based port index
- *
- * NOTE: valid without locking as long as wusbhc is referenced (as the
- *       number of ports doesn't change). The data pointed to has to
- *       be verified though :)
- */
-static inline struct wusb_port *wusb_port_by_idx(struct wusbhc *wusbhc,
-						 u8 port_idx)
-{
-	return &wusbhc->port[port_idx];
-}
-
-/*
- * wusb_port_no_to_idx - Convert port number (per usb_dev->portnum) to
- * a port_idx.
- *
- * USB stack USB ports are 1 based!!
- *
- * NOTE: only valid for WUSB devices!!!
- */
-static inline u8 wusb_port_no_to_idx(u8 port_no)
-{
-	return port_no - 1;
-}
-
-extern struct wusb_dev *__wusb_dev_get_by_usb_dev(struct wusbhc *,
-						  struct usb_device *);
-
-/*
- * Return a referenced wusb_dev given a @usb_dev
- *
- * Returns NULL if the usb_dev is being torn down.
- *
- * FIXME: move offline
- */
-static inline
-struct wusb_dev *wusb_dev_get_by_usb_dev(struct usb_device *usb_dev)
-{
-	struct wusbhc *wusbhc;
-	struct wusb_dev *wusb_dev;
-	wusbhc = wusbhc_get_by_usb_dev(usb_dev);
-	if (wusbhc == NULL)
-		return NULL;
-	mutex_lock(&wusbhc->mutex);
-	wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, usb_dev);
-	mutex_unlock(&wusbhc->mutex);
-	wusbhc_put(wusbhc);
-	return wusb_dev;
-}
-
-/* Misc */
-
-extern struct workqueue_struct *wusbd;
-#endif /* #ifndef __WUSBHC_H__ */