summaryrefslogtreecommitdiff
path: root/drivers/usb/otg
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/otg')
-rw-r--r--drivers/usb/otg/Kconfig10
-rw-r--r--drivers/usb/otg/Makefile1
-rw-r--r--drivers/usb/otg/gpio_vbus.c42
-rw-r--r--drivers/usb/otg/nop-usb-xceiv.c180
-rw-r--r--drivers/usb/otg/twl4030-usb.c73
5 files changed, 285 insertions, 21 deletions
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index ee55b449ffde..aa884d072f0b 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -43,7 +43,7 @@ config ISP1301_OMAP
config TWL4030_USB
tristate "TWL4030 USB Transceiver Driver"
- depends on TWL4030_CORE
+ depends on TWL4030_CORE && REGULATOR_TWL4030
select USB_OTG_UTILS
help
Enable this to support the USB OTG transceiver on TWL4030
@@ -51,4 +51,12 @@ config TWL4030_USB
This transceiver supports high and full speed devices plus,
in host mode, low speed.
+config NOP_USB_XCEIV
+ tristate "NOP USB Transceiver Driver"
+ select USB_OTG_UTILS
+ help
+ this driver is to be used by all the usb transceiver which are either
+ built-in with usb ip or which are autonomous and doesn't require any
+ phy programming such as ISP1x04 etc.
+
endif # USB || OTG
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
index d73c7cf5e2f7..208167856529 100644
--- a/drivers/usb/otg/Makefile
+++ b/drivers/usb/otg/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_OTG_UTILS) += otg.o
obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
+obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG
ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
index 63a6036f04be..1c26c94513e9 100644
--- a/drivers/usb/otg/gpio_vbus.c
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -13,6 +13,7 @@
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
+#include <linux/workqueue.h>
#include <linux/regulator/consumer.h>
@@ -34,6 +35,7 @@ struct gpio_vbus_data {
struct regulator *vbus_draw;
int vbus_draw_enabled;
unsigned mA;
+ struct work_struct work;
};
@@ -76,24 +78,26 @@ static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA)
gpio_vbus->mA = mA;
}
-/* VBUS change IRQ handler */
-static irqreturn_t gpio_vbus_irq(int irq, void *data)
+static int is_vbus_powered(struct gpio_vbus_mach_info *pdata)
{
- struct platform_device *pdev = data;
- struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
- struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
- int gpio, vbus;
+ int vbus;
vbus = gpio_get_value(pdata->gpio_vbus);
if (pdata->gpio_vbus_inverted)
vbus = !vbus;
- dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n",
- vbus ? "supplied" : "inactive",
- gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none");
+ return vbus;
+}
+
+static void gpio_vbus_work(struct work_struct *work)
+{
+ struct gpio_vbus_data *gpio_vbus =
+ container_of(work, struct gpio_vbus_data, work);
+ struct gpio_vbus_mach_info *pdata = gpio_vbus->dev->platform_data;
+ int gpio;
if (!gpio_vbus->otg.gadget)
- return IRQ_HANDLED;
+ return;
/* Peripheral controllers which manage the pullup themselves won't have
* gpio_pullup configured here. If it's configured here, we'll do what
@@ -101,7 +105,7 @@ static irqreturn_t gpio_vbus_irq(int irq, void *data)
* that may complicate usb_gadget_{,dis}connect() support.
*/
gpio = pdata->gpio_pullup;
- if (vbus) {
+ if (is_vbus_powered(pdata)) {
gpio_vbus->otg.state = OTG_STATE_B_PERIPHERAL;
usb_gadget_vbus_connect(gpio_vbus->otg.gadget);
@@ -121,6 +125,21 @@ static irqreturn_t gpio_vbus_irq(int irq, void *data)
usb_gadget_vbus_disconnect(gpio_vbus->otg.gadget);
gpio_vbus->otg.state = OTG_STATE_B_IDLE;
}
+}
+
+/* VBUS change IRQ handler */
+static irqreturn_t gpio_vbus_irq(int irq, void *data)
+{
+ struct platform_device *pdev = data;
+ struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data;
+ struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
+
+ dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n",
+ is_vbus_powered(pdata) ? "supplied" : "inactive",
+ gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none");
+
+ if (gpio_vbus->otg.gadget)
+ schedule_work(&gpio_vbus->work);
return IRQ_HANDLED;
}
@@ -257,6 +276,7 @@ static int __init gpio_vbus_probe(struct platform_device *pdev)
irq, err);
goto err_irq;
}
+ INIT_WORK(&gpio_vbus->work, gpio_vbus_work);
/* only active when a gadget is registered */
err = otg_set_transceiver(&gpio_vbus->otg);
diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
new file mode 100644
index 000000000000..4b933f646f2e
--- /dev/null
+++ b/drivers/usb/otg/nop-usb-xceiv.c
@@ -0,0 +1,180 @@
+/*
+ * drivers/usb/otg/nop-usb-xceiv.c
+ *
+ * NOP USB transceiver for all USB transceiver which are either built-in
+ * into USB IP or which are mostly autonomous.
+ *
+ * Copyright (C) 2009 Texas Instruments Inc
+ * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Current status:
+ * this is to add "nop" transceiver for all those phy which is
+ * autonomous such as isp1504 etc.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/otg.h>
+
+struct nop_usb_xceiv {
+ struct otg_transceiver otg;
+ struct device *dev;
+};
+
+static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
+
+static struct platform_device nop_xceiv_device = {
+ .name = "nop_usb_xceiv",
+ .id = -1,
+ .dev = {
+ .dma_mask = &nop_xceiv_dmamask,
+ .coherent_dma_mask = DMA_32BIT_MASK,
+ .platform_data = NULL,
+ },
+};
+
+void usb_nop_xceiv_register(void)
+{
+ if (platform_device_register(&nop_xceiv_device) < 0) {
+ printk(KERN_ERR "Unable to register usb nop transceiver\n");
+ return;
+ }
+}
+
+void usb_nop_xceiv_unregister(void)
+{
+ platform_device_unregister(&nop_xceiv_device);
+}
+
+static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x)
+{
+ return container_of(x, struct nop_usb_xceiv, otg);
+}
+
+static int nop_set_suspend(struct otg_transceiver *x, int suspend)
+{
+ return 0;
+}
+
+static int nop_set_peripheral(struct otg_transceiver *x,
+ struct usb_gadget *gadget)
+{
+ struct nop_usb_xceiv *nop;
+
+ if (!x)
+ return -ENODEV;
+
+ nop = xceiv_to_nop(x);
+
+ if (!gadget) {
+ nop->otg.gadget = NULL;
+ return -ENODEV;
+ }
+
+ nop->otg.gadget = gadget;
+ nop->otg.state = OTG_STATE_B_IDLE;
+ return 0;
+}
+
+static int nop_set_host(struct otg_transceiver *x, struct usb_bus *host)
+{
+ struct nop_usb_xceiv *nop;
+
+ if (!x)
+ return -ENODEV;
+
+ nop = xceiv_to_nop(x);
+
+ if (!host) {
+ nop->otg.host = NULL;
+ return -ENODEV;
+ }
+
+ nop->otg.host = host;
+ return 0;
+}
+
+static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev)
+{
+ struct nop_usb_xceiv *nop;
+ int err;
+
+ nop = kzalloc(sizeof *nop, GFP_KERNEL);
+ if (!nop)
+ return -ENOMEM;
+
+ nop->dev = &pdev->dev;
+ nop->otg.dev = nop->dev;
+ nop->otg.label = "nop-xceiv";
+ nop->otg.state = OTG_STATE_UNDEFINED;
+ nop->otg.set_host = nop_set_host;
+ nop->otg.set_peripheral = nop_set_peripheral;
+ nop->otg.set_suspend = nop_set_suspend;
+
+ err = otg_set_transceiver(&nop->otg);
+ if (err) {
+ dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
+ err);
+ goto exit;
+ }
+
+ platform_set_drvdata(pdev, nop);
+
+ return 0;
+exit:
+ kfree(nop);
+ return err;
+}
+
+static int __devexit nop_usb_xceiv_remove(struct platform_device *pdev)
+{
+ struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
+
+ otg_set_transceiver(NULL);
+
+ platform_set_drvdata(pdev, NULL);
+ kfree(nop);
+
+ return 0;
+}
+
+static struct platform_driver nop_usb_xceiv_driver = {
+ .probe = nop_usb_xceiv_probe,
+ .remove = __devexit_p(nop_usb_xceiv_remove),
+ .driver = {
+ .name = "nop_usb_xceiv",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init nop_usb_xceiv_init(void)
+{
+ return platform_driver_register(&nop_usb_xceiv_driver);
+}
+subsys_initcall(nop_usb_xceiv_init);
+
+static void __exit nop_usb_xceiv_exit(void)
+{
+ platform_driver_unregister(&nop_usb_xceiv_driver);
+}
+module_exit(nop_usb_xceiv_exit);
+
+MODULE_ALIAS("platform:nop_usb_xceiv");
+MODULE_AUTHOR("Texas Instruments Inc");
+MODULE_DESCRIPTION("NOP USB Transceiver driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 416e4410be02..d9478d0e1c8b 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -34,6 +34,8 @@
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include <linux/i2c/twl4030.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
/* Register defines */
@@ -246,6 +248,11 @@ struct twl4030_usb {
struct otg_transceiver otg;
struct device *dev;
+ /* TWL4030 internal USB regulator supplies */
+ struct regulator *usb1v5;
+ struct regulator *usb1v8;
+ struct regulator *usb3v1;
+
/* for vbus reporting with irqs disabled */
spinlock_t lock;
@@ -434,6 +441,18 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on)
pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
if (on) {
+ regulator_enable(twl->usb3v1);
+ regulator_enable(twl->usb1v8);
+ /*
+ * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
+ * in twl4030) resets the VUSB_DEDICATED2 register. This reset
+ * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
+ * SLEEP. We work around this by clearing the bit after usv3v1
+ * is re-activated. This ensures that VUSB3V1 is really active.
+ */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0,
+ VUSB_DEDICATED2);
+ regulator_enable(twl->usb1v5);
pwr &= ~PHY_PWR_PHYPWD;
WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
twl4030_usb_write(twl, PHY_CLK_CTRL,
@@ -443,6 +462,9 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on)
} else {
pwr |= PHY_PWR_PHYPWD;
WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+ regulator_disable(twl->usb1v5);
+ regulator_disable(twl->usb1v8);
+ regulator_disable(twl->usb3v1);
}
}
@@ -468,7 +490,7 @@ static void twl4030_phy_resume(struct twl4030_usb *twl)
twl->asleep = 0;
}
-static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
+static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
{
/* Enable writing to power configuration registers */
twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
@@ -480,20 +502,45 @@ static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
/* input to VUSB3V1 LDO is from VBAT, not VBUS */
twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
- /* turn on 3.1V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB3V1_DEV_GRP);
+ /* Initialize 3.1V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
+
+ twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
+ if (IS_ERR(twl->usb3v1))
+ return -ENODEV;
+
twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
- /* turn on 1.5V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V5_DEV_GRP);
+ /* Initialize 1.5V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
+
+ twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
+ if (IS_ERR(twl->usb1v5))
+ goto fail1;
+
twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
- /* turn on 1.8V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V8_DEV_GRP);
+ /* Initialize 1.8V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
+
+ twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
+ if (IS_ERR(twl->usb1v8))
+ goto fail2;
+
twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
/* disable access to power configuration registers */
twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
+
+ return 0;
+
+fail2:
+ regulator_put(twl->usb1v5);
+ twl->usb1v5 = NULL;
+fail1:
+ regulator_put(twl->usb3v1);
+ twl->usb3v1 = NULL;
+ return -ENODEV;
}
static ssize_t twl4030_usb_vbus_show(struct device *dev,
@@ -598,7 +645,7 @@ static int __init twl4030_usb_probe(struct platform_device *pdev)
{
struct twl4030_usb_data *pdata = pdev->dev.platform_data;
struct twl4030_usb *twl;
- int status;
+ int status, err;
if (!pdata) {
dev_dbg(&pdev->dev, "platform_data not available\n");
@@ -622,7 +669,12 @@ static int __init twl4030_usb_probe(struct platform_device *pdev)
/* init spinlock for workqueue */
spin_lock_init(&twl->lock);
- twl4030_usb_ldo_init(twl);
+ err = twl4030_usb_ldo_init(twl);
+ if (err) {
+ dev_err(&pdev->dev, "ldo init failed\n");
+ kfree(twl);
+ return err;
+ }
otg_set_transceiver(&twl->otg);
platform_set_drvdata(pdev, twl);
@@ -688,6 +740,9 @@ static int __exit twl4030_usb_remove(struct platform_device *pdev)
twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
twl4030_phy_power(twl, 0);
+ regulator_put(twl->usb1v5);
+ regulator_put(twl->usb1v8);
+ regulator_put(twl->usb3v1);
kfree(twl);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 10:28:22 +0300