diff options
| -rw-r--r-- | drivers/usb/gadget/udc/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/usb/gadget/udc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/usb/gadget/udc/amd5536udc.h | 14 | ||||
| -rw-r--r-- | drivers/usb/gadget/udc/snps_udc_core.c | 54 | ||||
| -rw-r--r-- | drivers/usb/gadget/udc/snps_udc_plat.c | 344 |
5 files changed, 409 insertions, 20 deletions
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 1c14c283cc47..e5d3ba9a8604 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -256,7 +256,7 @@ config USB_MV_U3D controller, which support super speed USB peripheral. config USB_SNP_CORE - depends on USB_AMD5536UDC + depends on (USB_AMD5536UDC || USB_SNP_UDC_PLAT) tristate help This enables core driver support for Synopsys USB 2.0 Device @@ -269,6 +269,20 @@ config USB_SNP_CORE This IP is different to the High Speed OTG IP that can be enabled by selecting USB_DWC2 or USB_DWC3 options. +config USB_SNP_UDC_PLAT + tristate "Synopsys USB 2.0 Device controller" + depends on (USB_GADGET && OF) + select USB_GADGET_DUALSPEED + select USB_SNP_CORE + default ARCH_BCM_IPROC + help + This adds Platform Device support for Synopsys Designware core + AHB subsystem USB2.0 Device Controller (UDC). + + This driver works with UDCs integrated into Broadcom's Northstar2 + and Cygnus SoCs. + + If unsure, say N. # # Controllers available in both integrated and discrete versions # diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile index 4f4fd626b9ff..ea9e1c7f1923 100644 --- a/drivers/usb/gadget/udc/Makefile +++ b/drivers/usb/gadget/udc/Makefile @@ -37,4 +37,5 @@ obj-$(CONFIG_USB_FOTG210_UDC) += fotg210-udc.o obj-$(CONFIG_USB_MV_U3D) += mv_u3d_core.o obj-$(CONFIG_USB_GR_UDC) += gr_udc.o obj-$(CONFIG_USB_GADGET_XILINX) += udc-xilinx.o +obj-$(CONFIG_USB_SNP_UDC_PLAT) += snps_udc_plat.o obj-$(CONFIG_USB_BDC_UDC) += bdc/ diff --git a/drivers/usb/gadget/udc/amd5536udc.h b/drivers/usb/gadget/udc/amd5536udc.h index 91aae23b7370..4fe22d432af2 100644 --- a/drivers/usb/gadget/udc/amd5536udc.h +++ b/drivers/usb/gadget/udc/amd5536udc.h @@ -16,6 +16,7 @@ /* debug control */ /* #define UDC_VERBOSE */ +#include <linux/extcon.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> @@ -28,6 +29,9 @@ #define UDC_HSA0_REV 1 #define UDC_HSB1_REV 2 +/* Broadcom chip rev. */ +#define UDC_BCM_REV 10 + /* * SETUP usb commands * needed, because some SETUP's are handled in hw, but must be passed to @@ -112,6 +116,7 @@ #define UDC_DEVCTL_BRLEN_MASK 0x00ff0000 #define UDC_DEVCTL_BRLEN_OFS 16 +#define UDC_DEVCTL_SRX_FLUSH 14 #define UDC_DEVCTL_CSR_DONE 13 #define UDC_DEVCTL_DEVNAK 12 #define UDC_DEVCTL_SD 10 @@ -564,7 +569,15 @@ struct udc { u16 cur_intf; u16 cur_alt; + /* for platform device and extcon support */ struct device *dev; + struct phy *udc_phy; + struct extcon_dev *edev; + struct extcon_specific_cable_nb extcon_nb; + struct notifier_block nb; + struct delayed_work drd_work; + struct workqueue_struct *drd_wq; + u32 conn_type; }; #define to_amd5536_udc(g) (container_of((g), struct udc, gadget)) @@ -580,6 +593,7 @@ int udc_enable_dev_setup_interrupts(struct udc *dev); int udc_mask_unused_interrupts(struct udc *dev); irqreturn_t udc_irq(int irq, void *pdev); void gadget_release(struct device *pdev); +void empty_req_queue(struct udc_ep *ep); void udc_basic_init(struct udc *dev); void free_dma_pools(struct udc *dev); int init_dma_pools(struct udc *dev); diff --git a/drivers/usb/gadget/udc/snps_udc_core.c b/drivers/usb/gadget/udc/snps_udc_core.c index d592f77da744..38a165dbf924 100644 --- a/drivers/usb/gadget/udc/snps_udc_core.c +++ b/drivers/usb/gadget/udc/snps_udc_core.c @@ -41,7 +41,6 @@ #include "amd5536udc.h" static void udc_tasklet_disconnect(unsigned long); -static void empty_req_queue(struct udc_ep *); static void udc_setup_endpoints(struct udc *dev); static void udc_soft_reset(struct udc *dev); static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep); @@ -1244,7 +1243,7 @@ finished: } /* Empty request queue of an endpoint; caller holds spinlock */ -static void empty_req_queue(struct udc_ep *ep) +void empty_req_queue(struct udc_ep *ep) { struct udc_request *req; @@ -1256,6 +1255,7 @@ static void empty_req_queue(struct udc_ep *ep) complete_req(ep, req, -ESHUTDOWN); } } +EXPORT_SYMBOL_GPL(empty_req_queue); /* Dequeues a request packet, called by gadget driver */ static int udc_dequeue(struct usb_ep *usbep, struct usb_request *usbreq) @@ -1623,6 +1623,9 @@ static void udc_setup_endpoints(struct udc *dev) /* Bringup after Connect event, initial bringup to be ready for ep0 events */ static void usb_connect(struct udc *dev) { + /* Return if already connected */ + if (dev->connected) + return; dev_info(dev->dev, "USB Connect\n"); @@ -1641,6 +1644,9 @@ static void usb_connect(struct udc *dev) */ static void usb_disconnect(struct udc *dev) { + /* Return if already disconnected */ + if (!dev->connected) + return; dev_info(dev->dev, "USB Disconnect\n"); @@ -1715,11 +1721,15 @@ static void udc_soft_reset(struct udc *dev) /* device int. status reset */ writel(UDC_DEV_MSK_DISABLE, &dev->regs->irqsts); - spin_lock_irqsave(&udc_irq_spinlock, flags); - writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); - readl(&dev->regs->cfg); - spin_unlock_irqrestore(&udc_irq_spinlock, flags); - + /* Don't do this for Broadcom UDC since this is a reserved + * bit. + */ + if (dev->chiprev != UDC_BCM_REV) { + spin_lock_irqsave(&udc_irq_spinlock, flags); + writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); + readl(&dev->regs->cfg); + spin_unlock_irqrestore(&udc_irq_spinlock, flags); + } } /* RDE timer callback to set RDE bit */ @@ -3171,21 +3181,27 @@ int udc_probe(struct udc *dev) dev_info(dev->dev, "%s\n", mod_desc); snprintf(tmp, sizeof(tmp), "%d", dev->irq); - dev_info(dev->dev, - "irq %s, pci mem %08lx, chip rev %02x(Geode5536 %s)\n", - tmp, dev->phys_addr, dev->chiprev, - (dev->chiprev == UDC_HSA0_REV) ? "A0" : "B1"); - strcpy(tmp, UDC_DRIVER_VERSION_STRING); - if (dev->chiprev == UDC_HSA0_REV) { - dev_err(dev->dev, "chip revision is A0; too old\n"); - retval = -ENODEV; - goto finished; + + /* Print this device info for AMD chips only*/ + if (dev->chiprev == UDC_HSA0_REV || + dev->chiprev == UDC_HSB1_REV) { + dev_info(dev->dev, "irq %s, pci mem %08lx, chip rev %02x(Geode5536 %s)\n", + tmp, dev->phys_addr, dev->chiprev, + (dev->chiprev == UDC_HSA0_REV) ? + "A0" : "B1"); + strcpy(tmp, UDC_DRIVER_VERSION_STRING); + if (dev->chiprev == UDC_HSA0_REV) { + dev_err(dev->dev, "chip revision is A0; too old\n"); + retval = -ENODEV; + goto finished; + } + dev_info(dev->dev, + "driver version: %s(for Geode5536 B1)\n", tmp); } - dev_info(dev->dev, - "driver version: %s(for Geode5536 B1)\n", tmp); + udc = dev; - retval = usb_add_gadget_udc_release(&udc->pdev->dev, &dev->gadget, + retval = usb_add_gadget_udc_release(udc->dev, &dev->gadget, gadget_release); if (retval) goto finished; diff --git a/drivers/usb/gadget/udc/snps_udc_plat.c b/drivers/usb/gadget/udc/snps_udc_plat.c new file mode 100644 index 000000000000..2e11f19e07ae --- /dev/null +++ b/drivers/usb/gadget/udc/snps_udc_plat.c @@ -0,0 +1,344 @@ +/* + * snps_udc_plat.c - Synopsys UDC Platform Driver + * + * Copyright (C) 2016 Broadcom + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/extcon.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_gpio.h> +#include <linux/platform_device.h> +#include <linux/phy/phy.h> +#include <linux/module.h> +#include <linux/dmapool.h> +#include <linux/interrupt.h> +#include <linux/moduleparam.h> +#include "amd5536udc.h" + +/* description */ +#define UDC_MOD_DESCRIPTION "Synopsys UDC platform driver" + +void start_udc(struct udc *udc) +{ + if (udc->driver) { + dev_info(udc->dev, "Connecting...\n"); + udc_enable_dev_setup_interrupts(udc); + udc_basic_init(udc); + udc->connected = 1; + } +} + +void stop_udc(struct udc *udc) +{ + int tmp; + u32 reg; + + spin_lock(&udc->lock); + + /* Flush the receieve fifo */ + reg = readl(&udc->regs->ctl); + reg |= AMD_BIT(UDC_DEVCTL_SRX_FLUSH); + writel(reg, &udc->regs->ctl); + + reg = readl(&udc->regs->ctl); + reg &= ~(AMD_BIT(UDC_DEVCTL_SRX_FLUSH)); + writel(reg, &udc->regs->ctl); + dev_dbg(udc->dev, "ep rx queue flushed\n"); + + /* Mask interrupts. Required more so when the + * UDC is connected to a DRD phy. + */ + udc_mask_unused_interrupts(udc); + + /* Disconnect gadget driver */ + if (udc->driver) { + spin_unlock(&udc->lock); + udc->driver->disconnect(&udc->gadget); + spin_lock(&udc->lock); + + /* empty queues */ + for (tmp = 0; tmp < UDC_EP_NUM; tmp++) + empty_req_queue(&udc->ep[tmp]); + } + udc->connected = 0; + + spin_unlock(&udc->lock); + dev_info(udc->dev, "Device disconnected\n"); +} + +void udc_drd_work(struct work_struct *work) +{ + struct udc *udc; + + udc = container_of(to_delayed_work(work), + struct udc, drd_work); + + if (udc->conn_type) { + dev_dbg(udc->dev, "idle -> device\n"); + start_udc(udc); + } else { + dev_dbg(udc->dev, "device -> idle\n"); + stop_udc(udc); + } +} + +static int usbd_connect_notify(struct notifier_block *self, + unsigned long event, void *ptr) +{ + struct udc *udc = container_of(self, struct udc, nb); + + dev_dbg(udc->dev, "%s: event: %lu\n", __func__, event); + + udc->conn_type = event; + + schedule_delayed_work(&udc->drd_work, 0); + + return NOTIFY_OK; +} + +static int udc_plat_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct udc *udc; + int ret; + + udc = devm_kzalloc(dev, sizeof(*udc), GFP_KERNEL); + if (!udc) + return -ENOMEM; + + spin_lock_init(&udc->lock); + udc->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + udc->virt_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(udc->regs)) + return PTR_ERR(udc->regs); + + /* udc csr registers base */ + udc->csr = udc->virt_addr + UDC_CSR_ADDR; + + /* dev registers base */ + udc->regs = udc->virt_addr + UDC_DEVCFG_ADDR; + + /* ep registers base */ + udc->ep_regs = udc->virt_addr + UDC_EPREGS_ADDR; + + /* fifo's base */ + udc->rxfifo = (u32 __iomem *)(udc->virt_addr + UDC_RXFIFO_ADDR); + udc->txfifo = (u32 __iomem *)(udc->virt_addr + UDC_TXFIFO_ADDR); + + udc->phys_addr = (unsigned long)res->start; + + udc->irq = irq_of_parse_and_map(dev->of_node, 0); + if (udc->irq <= 0) { + dev_err(dev, "Can't parse and map interrupt\n"); + return -EINVAL; + } + + udc->udc_phy = devm_of_phy_get_by_index(dev, dev->of_node, 0); + if (IS_ERR(udc->udc_phy)) { + dev_err(dev, "Failed to obtain phy from device tree\n"); + return PTR_ERR(udc->udc_phy); + } + + ret = phy_init(udc->udc_phy); + if (ret) { + dev_err(dev, "UDC phy init failed"); + return ret; + } + + ret = phy_power_on(udc->udc_phy); + if (ret) { + dev_err(dev, "UDC phy power on failed"); + phy_exit(udc->udc_phy); + return ret; + } + + /* Register for extcon if supported */ + if (of_get_property(dev->of_node, "extcon", NULL)) { + udc->edev = extcon_get_edev_by_phandle(dev, 0); + if (IS_ERR(udc->edev)) { + if (PTR_ERR(udc->edev) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_err(dev, "Invalid or missing extcon\n"); + ret = PTR_ERR(udc->edev); + goto exit_phy; + } + + udc->nb.notifier_call = usbd_connect_notify; + ret = extcon_register_notifier(udc->edev, EXTCON_USB, + &udc->nb); + if (ret < 0) { + dev_err(dev, "Can't register extcon device\n"); + goto exit_phy; + } + + ret = extcon_get_cable_state_(udc->edev, EXTCON_USB); + if (ret < 0) { + dev_err(dev, "Can't get cable state\n"); + goto exit_extcon; + } else if (ret) { + udc->conn_type = ret; + } + INIT_DELAYED_WORK(&udc->drd_work, udc_drd_work); + } + + /* init dma pools */ + if (use_dma) { + ret = init_dma_pools(udc); + if (ret != 0) + goto exit_extcon; + } + + ret = devm_request_irq(dev, udc->irq, udc_irq, IRQF_SHARED, + "snps-udc", udc); + if (ret < 0) { + dev_err(dev, "Request irq %d failed for UDC\n", udc->irq); + goto exit_dma; + } + + platform_set_drvdata(pdev, udc); + udc->chiprev = UDC_BCM_REV; + + if (udc_probe(udc)) { + ret = -ENODEV; + goto exit_dma; + } + dev_info(dev, "Synopsys UDC platform driver probe successful\n"); + + return 0; + +exit_dma: + if (use_dma) + free_dma_pools(udc); +exit_extcon: + if (udc->edev) + extcon_unregister_notifier(udc->edev, EXTCON_USB, &udc->nb); +exit_phy: + if (udc->udc_phy) { + phy_power_off(udc->udc_phy); + phy_exit(udc->udc_phy); + } + return ret; +} + +static int udc_plat_remove(struct platform_device *pdev) +{ + struct udc *dev; + + dev = platform_get_drvdata(pdev); + + usb_del_gadget_udc(&dev->gadget); + /* gadget driver must not be registered */ + if (WARN_ON(dev->driver)) + return 0; + + /* dma pool cleanup */ + free_dma_pools(dev); + + udc_remove(dev); + + platform_set_drvdata(pdev, NULL); + + if (dev->drd_wq) { + flush_workqueue(dev->drd_wq); + destroy_workqueue(dev->drd_wq); + } + + phy_power_off(dev->udc_phy); + phy_exit(dev->udc_phy); + extcon_unregister_notifier(dev->edev, EXTCON_USB, &dev->nb); + + dev_info(&pdev->dev, "Synopsys UDC platform driver removed\n"); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int udc_plat_suspend(struct device *dev) +{ + struct udc *udc; + + udc = dev_get_drvdata(dev); + stop_udc(udc); + + if (extcon_get_cable_state_(udc->edev, EXTCON_USB) > 0) { + dev_dbg(udc->dev, "device -> idle\n"); + stop_udc(udc); + } + phy_power_off(udc->udc_phy); + phy_exit(udc->udc_phy); + + return 0; +} + +static int udc_plat_resume(struct device *dev) +{ + struct udc *udc; + int ret; + + udc = dev_get_drvdata(dev); + + ret = phy_init(udc->udc_phy); + if (ret) { + dev_err(udc->dev, "UDC phy init failure"); + return ret; + } + + ret = phy_power_on(udc->udc_phy); + if (ret) { + dev_err(udc->dev, "UDC phy power on failure"); + phy_exit(udc->udc_phy); + return ret; + } + + if (extcon_get_cable_state_(udc->edev, EXTCON_USB) > 0) { + dev_dbg(udc->dev, "idle -> device\n"); + start_udc(udc); + } + + return 0; +} +static const struct dev_pm_ops udc_plat_pm_ops = { + .suspend = udc_plat_suspend, + .resume = udc_plat_resume, +}; +#endif + +#if defined(CONFIG_OF) +static const struct of_device_id of_udc_match[] = { + { .compatible = "brcm,ns2-udc", }, + { .compatible = "brcm,cygnus-udc", }, + { .compatible = "brcm,iproc-udc", }, + { } +}; +MODULE_DEVICE_TABLE(of, of_udc_match); +#endif + +static struct platform_driver udc_plat_driver = { + .probe = udc_plat_probe, + .remove = udc_plat_remove, + .driver = { + .name = "snps-udc-plat", + .of_match_table = of_match_ptr(of_udc_match), +#ifdef CONFIG_PM_SLEEP + .pm = &udc_plat_pm_ops, +#endif + }, +}; +module_platform_driver(udc_plat_driver); + +MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION); +MODULE_AUTHOR("Broadcom"); +MODULE_LICENSE("GPL v2"); |