Merge tag 'usb-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB patches from Greg Kroah-Hartman:
 "Here's the big USB patch set for the 3.6-rc1 merge window.

  Lots of little changes in here, primarily for gadget controllers and
  drivers.  There's some scsi changes that I think also went in through
  the scsi tree, but they merge just fine.  All of these patches have
  been in the linux-next tree for a while now.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fix up trivial conflicts in include/scsi/scsi_device.h (same libata
conflict that Jeff had already encountered)

* tag 'usb-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (207 commits)
  usb: Add USB_QUIRK_RESET_RESUME for all Logitech UVC webcams
  usb: Add quirk detection based on interface information
  usb: s3c-hsotg: Add header file protection macros in s3c-hsotg.h
  USB: ehci-s5p: Add vbus setup function to the s5p ehci glue layer
  USB: add USB_VENDOR_AND_INTERFACE_INFO() macro
  USB: notify phy when root hub port connect change
  USB: remove 8 bytes of padding from usb_host_interface on 64 bit builds
  USB: option: add ZTE MF821D
  USB: sierra: QMI mode MC7710 moved to qcserial
  USB: qcserial: adding Sierra Wireless devices
  USB: qcserial: support generic Qualcomm serial ports
  USB: qcserial: make probe more flexible
  USB: qcserial: centralize probe exit path
  USB: qcserial: consolidate usb_set_interface calls
  USB: ehci-s5p: Add support for device tree
  USB: ohci-exynos: Add support for device tree
  USB: ehci-omap: fix compile failure(v1)
  usb: host: tegra: pass correct pointer in ehci_setup()
  USB: ehci-fsl: Update ifdef check to work on 64-bit ppc
  USB: serial: keyspan: Removed unrequired parentheses.
  ...

13 files changed, 433 insertions, 138 deletions

diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index 5c87db06b598..13fd1ddf742f 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -116,6 +116,16 @@ config FSL_USB2_OTG
 	help
 	  Enable this to support Freescale USB OTG transceiver.
 
+config USB_MXS_PHY
+	tristate "Freescale MXS USB PHY support"
+	depends on ARCH_MXC || ARCH_MXS
+	select STMP_DEVICE
+	select USB_OTG_UTILS
+	help
+	  Enable this to support the Freescale MXS USB PHY.
+
+	  MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x.
+
 config USB_MV_OTG
 	tristate "Marvell USB OTG support"
 	depends on USB_EHCI_MV && USB_MV_UDC && USB_SUSPEND
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
index 41aa5098b139..a844b8d35d14 100644
--- a/drivers/usb/otg/Makefile
+++ b/drivers/usb/otg/Makefile
@@ -20,4 +20,5 @@ obj-$(CONFIG_USB_MSM_OTG)	+= msm_otg.o
 obj-$(CONFIG_AB8500_USB)	+= ab8500-usb.o
 fsl_usb2_otg-objs		:= fsl_otg.o otg_fsm.o
 obj-$(CONFIG_FSL_USB2_OTG)	+= fsl_usb2_otg.o
+obj-$(CONFIG_USB_MXS_PHY)	+= mxs-phy.o
 obj-$(CONFIG_USB_MV_OTG)	+= mv_otg.o
diff --git a/drivers/usb/otg/ab8500-usb.c b/drivers/usb/otg/ab8500-usb.c
index a84af677dc59..ae8ad561f083 100644
--- a/drivers/usb/otg/ab8500-usb.c
+++ b/drivers/usb/otg/ab8500-usb.c
@@ -529,7 +529,7 @@ static int __devinit ab8500_usb_probe(struct platform_device *pdev)
 	if (err < 0)
 		goto fail0;
 
-	err = usb_set_transceiver(&ab->phy);
+	err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
 	if (err) {
 		dev_err(&pdev->dev, "Can't register transceiver\n");
 		goto fail1;
@@ -556,7 +556,7 @@ static int __devexit ab8500_usb_remove(struct platform_device *pdev)
 
 	cancel_work_sync(&ab->phy_dis_work);
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&ab->phy);
 
 	ab8500_usb_host_phy_dis(ab);
 	ab8500_usb_peri_phy_dis(ab);
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c
index be4a63e8302f..23c798cb2d7f 100644
--- a/drivers/usb/otg/fsl_otg.c
+++ b/drivers/usb/otg/fsl_otg.c
@@ -806,7 +806,7 @@ static int fsl_otg_conf(struct platform_device *pdev)
 	fsl_otg_dev = fsl_otg_tc;
 
 	/* Store the otg transceiver */
-	status = usb_set_transceiver(&fsl_otg_tc->phy);
+	status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
 	if (status) {
 		pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
 		goto err;
@@ -824,7 +824,7 @@ err:
 int usb_otg_start(struct platform_device *pdev)
 {
 	struct fsl_otg *p_otg;
-	struct usb_phy *otg_trans = usb_get_transceiver();
+	struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
 	struct otg_fsm *fsm;
 	int status;
 	struct resource *res;
@@ -1134,7 +1134,7 @@ static int __devexit fsl_otg_remove(struct platform_device *pdev)
 {
 	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&fsl_otg_dev->phy);
 	free_irq(fsl_otg_dev->irq, fsl_otg_dev);
 
 	iounmap((void *)usb_dr_regs);
diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c
index bde6298a9693..a67ffe22179a 100644
--- a/drivers/usb/otg/gpio_vbus.c
+++ b/drivers/usb/otg/gpio_vbus.c
@@ -320,7 +320,7 @@ static int __init gpio_vbus_probe(struct platform_device *pdev)
 	}
 
 	/* only active when a gadget is registered */
-	err = usb_set_transceiver(&gpio_vbus->phy);
+	err = usb_add_phy(&gpio_vbus->phy, USB_PHY_TYPE_USB2);
 	if (err) {
 		dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
 			err);
@@ -354,7 +354,7 @@ static int __exit gpio_vbus_remove(struct platform_device *pdev)
 	cancel_delayed_work_sync(&gpio_vbus->work);
 	regulator_put(gpio_vbus->vbus_draw);
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&gpio_vbus->phy);
 
 	free_irq(gpio_vbus->irq, pdev);
 	if (gpio_is_valid(pdata->gpio_pullup))
diff --git a/drivers/usb/otg/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c
index e0558dfcfafc..575fc815c932 100644
--- a/drivers/usb/otg/isp1301_omap.c
+++ b/drivers/usb/otg/isp1301_omap.c
@@ -1336,9 +1336,6 @@ static int
 isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
 {
 	struct isp1301	*isp = container_of(otg->phy, struct isp1301, phy);
-#ifndef	CONFIG_USB_OTG
-	u32 l;
-#endif
 
 	if (!otg || isp != the_transceiver)
 		return -ENODEV;
@@ -1365,10 +1362,14 @@ isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
 	otg->gadget = gadget;
 	// FIXME update its refcount
 
-	l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
-	l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
-	l |= OTG_ID;
-	omap_writel(l, OTG_CTRL);
+	{
+		u32 l;
+
+		l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
+		l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
+		l |= OTG_ID;
+		omap_writel(l, OTG_CTRL);
+	}
 
 	power_up(isp);
 	isp->phy.state = OTG_STATE_B_IDLE;
@@ -1610,7 +1611,7 @@ isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
 #endif
 
-	status = usb_set_transceiver(&isp->phy);
+	status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
 	if (status < 0)
 		dev_err(&i2c->dev, "can't register transceiver, %d\n",
 			status);
@@ -1649,7 +1650,7 @@ subsys_initcall(isp_init);
 static void __exit isp_exit(void)
 {
 	if (the_transceiver)
-		usb_set_transceiver(NULL);
+		usb_remove_phy(&the_transceiver->phy);
 	i2c_del_driver(&isp1301_driver);
 }
 module_exit(isp_exit);
diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c
index 1d0347c247d1..9f5fc906041a 100644
--- a/drivers/usb/otg/msm_otg.c
+++ b/drivers/usb/otg/msm_otg.c
@@ -1555,9 +1555,9 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	phy->otg->set_host = msm_otg_set_host;
 	phy->otg->set_peripheral = msm_otg_set_peripheral;
 
-	ret = usb_set_transceiver(&motg->phy);
+	ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
 	if (ret) {
-		dev_err(&pdev->dev, "usb_set_transceiver failed\n");
+		dev_err(&pdev->dev, "usb_add_phy failed\n");
 		goto free_irq;
 	}
 
@@ -1624,7 +1624,7 @@ static int __devexit msm_otg_remove(struct platform_device *pdev)
 	device_init_wakeup(&pdev->dev, 0);
 	pm_runtime_disable(&pdev->dev);
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(phy);
 	free_irq(motg->irq, motg);
 
 	/*
diff --git a/drivers/usb/otg/mv_otg.c b/drivers/usb/otg/mv_otg.c
index 6cc6c3ffbb83..3f124e8f5792 100644
--- a/drivers/usb/otg/mv_otg.c
+++ b/drivers/usb/otg/mv_otg.c
@@ -690,7 +690,7 @@ int mv_otg_remove(struct platform_device *pdev)
 	for (clk_i = 0; clk_i <= mvotg->clknum; clk_i++)
 		clk_put(mvotg->clk[clk_i]);
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&mvotg->phy);
 	platform_set_drvdata(pdev, NULL);
 
 	kfree(mvotg->phy.otg);
@@ -853,7 +853,7 @@ static int mv_otg_probe(struct platform_device *pdev)
 		goto err_disable_clk;
 	}
 
-	retval = usb_set_transceiver(&mvotg->phy);
+	retval = usb_add_phy(&mvotg->phy, USB_PHY_TYPE_USB2);
 	if (retval < 0) {
 		dev_err(&pdev->dev, "can't register transceiver, %d\n",
 			retval);
@@ -880,7 +880,7 @@ static int mv_otg_probe(struct platform_device *pdev)
 	return 0;
 
 err_set_transceiver:
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&mvotg->phy);
 err_free_irq:
 	free_irq(mvotg->irq, mvotg);
 err_disable_clk:
diff --git a/drivers/usb/otg/mxs-phy.c b/drivers/usb/otg/mxs-phy.c
new file mode 100644
index 000000000000..c1a67cb8e244
--- /dev/null
+++ b/drivers/usb/otg/mxs-phy.c
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Marek Vasut <marex@denx.de>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/usb/otg.h>
+#include <linux/stmp_device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#define DRIVER_NAME "mxs_phy"
+
+#define HW_USBPHY_PWD				0x00
+#define HW_USBPHY_CTRL				0x30
+#define HW_USBPHY_CTRL_SET			0x34
+#define HW_USBPHY_CTRL_CLR			0x38
+
+#define BM_USBPHY_CTRL_SFTRST			BIT(31)
+#define BM_USBPHY_CTRL_CLKGATE			BIT(30)
+#define BM_USBPHY_CTRL_ENUTMILEVEL3		BIT(15)
+#define BM_USBPHY_CTRL_ENUTMILEVEL2		BIT(14)
+#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT	BIT(1)
+
+struct mxs_phy {
+	struct usb_phy phy;
+	struct clk *clk;
+};
+
+#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
+
+static void mxs_phy_hw_init(struct mxs_phy *mxs_phy)
+{
+	void __iomem *base = mxs_phy->phy.io_priv;
+
+	stmp_reset_block(base + HW_USBPHY_CTRL);
+
+	/* Power up the PHY */
+	writel_relaxed(0, base + HW_USBPHY_PWD);
+
+	/* enable FS/LS device */
+	writel_relaxed(BM_USBPHY_CTRL_ENUTMILEVEL2 |
+			BM_USBPHY_CTRL_ENUTMILEVEL3,
+			base + HW_USBPHY_CTRL_SET);
+}
+
+static int mxs_phy_init(struct usb_phy *phy)
+{
+	struct mxs_phy *mxs_phy = to_mxs_phy(phy);
+
+	clk_prepare_enable(mxs_phy->clk);
+	mxs_phy_hw_init(mxs_phy);
+
+	return 0;
+}
+
+static void mxs_phy_shutdown(struct usb_phy *phy)
+{
+	struct mxs_phy *mxs_phy = to_mxs_phy(phy);
+
+	writel_relaxed(BM_USBPHY_CTRL_CLKGATE,
+			phy->io_priv + HW_USBPHY_CTRL_SET);
+
+	clk_disable_unprepare(mxs_phy->clk);
+}
+
+static int mxs_phy_on_connect(struct usb_phy *phy, int port)
+{
+	dev_dbg(phy->dev, "Connect on port %d\n", port);
+
+	mxs_phy_hw_init(to_mxs_phy(phy));
+	writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
+			phy->io_priv + HW_USBPHY_CTRL_SET);
+
+	return 0;
+}
+
+static int mxs_phy_on_disconnect(struct usb_phy *phy, int port)
+{
+	dev_dbg(phy->dev, "Disconnect on port %d\n", port);
+
+	writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
+			phy->io_priv + HW_USBPHY_CTRL_CLR);
+
+	return 0;
+}
+
+static int mxs_phy_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	void __iomem *base;
+	struct clk *clk;
+	struct mxs_phy *mxs_phy;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "can't get device resources\n");
+		return -ENOENT;
+	}
+
+	base = devm_request_and_ioremap(&pdev->dev, res);
+	if (!base)
+		return -EBUSY;
+
+	clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev,
+			"can't get the clock, err=%ld", PTR_ERR(clk));
+		return PTR_ERR(clk);
+	}
+
+	mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL);
+	if (!mxs_phy) {
+		dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n");
+		return -ENOMEM;
+	}
+
+	mxs_phy->phy.io_priv		= base;
+	mxs_phy->phy.dev		= &pdev->dev;
+	mxs_phy->phy.label		= DRIVER_NAME;
+	mxs_phy->phy.init		= mxs_phy_init;
+	mxs_phy->phy.shutdown		= mxs_phy_shutdown;
+	mxs_phy->phy.notify_connect	= mxs_phy_on_connect;
+	mxs_phy->phy.notify_disconnect	= mxs_phy_on_disconnect;
+
+	ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier);
+
+	mxs_phy->clk = clk;
+
+	platform_set_drvdata(pdev, &mxs_phy->phy);
+
+	return 0;
+}
+
+static int __devexit mxs_phy_remove(struct platform_device *pdev)
+{
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static const struct of_device_id mxs_phy_dt_ids[] = {
+	{ .compatible = "fsl,imx23-usbphy", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
+
+static struct platform_driver mxs_phy_driver = {
+	.probe = mxs_phy_probe,
+	.remove = __devexit_p(mxs_phy_remove),
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner	= THIS_MODULE,
+		.of_match_table = mxs_phy_dt_ids,
+	 },
+};
+
+static int __init mxs_phy_module_init(void)
+{
+	return platform_driver_register(&mxs_phy_driver);
+}
+postcore_initcall(mxs_phy_module_init);
+
+static void __exit mxs_phy_module_exit(void)
+{
+	platform_driver_unregister(&mxs_phy_driver);
+}
+module_exit(mxs_phy_module_exit);
+
+MODULE_ALIAS("platform:mxs-usb-phy");
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
+MODULE_DESCRIPTION("Freescale MXS USB PHY driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
index 58b26df6afd1..803f958f4133 100644
--- a/drivers/usb/otg/nop-usb-xceiv.c
+++ b/drivers/usb/otg/nop-usb-xceiv.c
@@ -117,7 +117,7 @@ static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev)
 	nop->phy.otg->set_host		= nop_set_host;
 	nop->phy.otg->set_peripheral	= nop_set_peripheral;
 
-	err = usb_set_transceiver(&nop->phy);
+	err = usb_add_phy(&nop->phy, USB_PHY_TYPE_USB2);
 	if (err) {
 		dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
 			err);
@@ -139,7 +139,7 @@ static int __devexit nop_usb_xceiv_remove(struct platform_device *pdev)
 {
 	struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
 
-	usb_set_transceiver(NULL);
+	usb_remove_phy(&nop->phy);
 
 	platform_set_drvdata(pdev, NULL);
 	kfree(nop->phy.otg);
diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c
index 801e597a1541..1bf60a22595c 100644
--- a/drivers/usb/otg/otg.c
+++ b/drivers/usb/otg/otg.c
@@ -11,60 +11,195 @@
 
 #include <linux/kernel.h>
 #include <linux/export.h>
+#include <linux/err.h>
 #include <linux/device.h>
+#include <linux/slab.h>
 
 #include <linux/usb/otg.h>
 
-static struct usb_phy *phy;
+static LIST_HEAD(phy_list);
+static DEFINE_SPINLOCK(phy_lock);
+
+static struct usb_phy *__usb_find_phy(struct list_head *list,
+	enum usb_phy_type type)
+{
+	struct usb_phy  *phy = NULL;
+
+	list_for_each_entry(phy, list, head) {
+		if (phy->type != type)
+			continue;
+
+		return phy;
+	}
+
+	return ERR_PTR(-ENODEV);
+}
+
+static void devm_usb_phy_release(struct device *dev, void *res)
+{
+	struct usb_phy *phy = *(struct usb_phy **)res;
+
+	usb_put_phy(phy);
+}
+
+static int devm_usb_phy_match(struct device *dev, void *res, void *match_data)
+{
+	return res == match_data;
+}
 
 /**
- * usb_get_transceiver - find the (single) USB transceiver
+ * devm_usb_get_phy - find the USB PHY
+ * @dev - device that requests this phy
+ * @type - the type of the phy the controller requires
  *
- * Returns the transceiver driver, after getting a refcount to it; or
- * null if there is no such transceiver.  The caller is responsible for
- * calling usb_put_transceiver() to release that count.
+ * Gets the phy using usb_get_phy(), and associates a device with it using
+ * devres. On driver detach, release function is invoked on the devres data,
+ * then, devres data is freed.
  *
  * For use by USB host and peripheral drivers.
  */
-struct usb_phy *usb_get_transceiver(void)
+struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type)
 {
-	if (phy)
-		get_device(phy->dev);
+	struct usb_phy **ptr, *phy;
+
+	ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return NULL;
+
+	phy = usb_get_phy(type);
+	if (!IS_ERR(phy)) {
+		*ptr = phy;
+		devres_add(dev, ptr);
+	} else
+		devres_free(ptr);
+
+	return phy;
+}
+EXPORT_SYMBOL(devm_usb_get_phy);
+
+/**
+ * usb_get_phy - find the USB PHY
+ * @type - the type of the phy the controller requires
+ *
+ * Returns the phy driver, after getting a refcount to it; or
+ * -ENODEV if there is no such phy.  The caller is responsible for
+ * calling usb_put_phy() to release that count.
+ *
+ * For use by USB host and peripheral drivers.
+ */
+struct usb_phy *usb_get_phy(enum usb_phy_type type)
+{
+	struct usb_phy	*phy = NULL;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&phy_lock, flags);
+
+	phy = __usb_find_phy(&phy_list, type);
+	if (IS_ERR(phy)) {
+		pr_err("unable to find transceiver of type %s\n",
+			usb_phy_type_string(type));
+		goto err0;
+	}
+
+	get_device(phy->dev);
+
+err0:
+	spin_unlock_irqrestore(&phy_lock, flags);
+
 	return phy;
 }
-EXPORT_SYMBOL(usb_get_transceiver);
+EXPORT_SYMBOL(usb_get_phy);
+
+/**
+ * devm_usb_put_phy - release the USB PHY
+ * @dev - device that wants to release this phy
+ * @phy - the phy returned by devm_usb_get_phy()
+ *
+ * destroys the devres associated with this phy and invokes usb_put_phy
+ * to release the phy.
+ *
+ * For use by USB host and peripheral drivers.
+ */
+void devm_usb_put_phy(struct device *dev, struct usb_phy *phy)
+{
+	int r;
+
+	r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy);
+	dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
+}
+EXPORT_SYMBOL(devm_usb_put_phy);
 
 /**
- * usb_put_transceiver - release the (single) USB transceiver
- * @x: the transceiver returned by usb_get_transceiver()
+ * usb_put_phy - release the USB PHY
+ * @x: the phy returned by usb_get_phy()
  *
- * Releases a refcount the caller received from usb_get_transceiver().
+ * Releases a refcount the caller received from usb_get_phy().
  *
  * For use by USB host and peripheral drivers.
  */
-void usb_put_transceiver(struct usb_phy *x)
+void usb_put_phy(struct usb_phy *x)
 {
 	if (x)
 		put_device(x->dev);
 }
-EXPORT_SYMBOL(usb_put_transceiver);
+EXPORT_SYMBOL(usb_put_phy);
 
 /**
- * usb_set_transceiver - declare the (single) USB transceiver
- * @x: the USB transceiver to be used; or NULL
+ * usb_add_phy - declare the USB PHY
+ * @x: the USB phy to be used; or NULL
+ * @type - the type of this PHY
  *
- * This call is exclusively for use by transceiver drivers, which
+ * This call is exclusively for use by phy drivers, which
  * coordinate the activities of drivers for host and peripheral
  * controllers, and in some cases for VBUS current regulation.
  */
-int usb_set_transceiver(struct usb_phy *x)
+int usb_add_phy(struct usb_phy *x, enum usb_phy_type type)
+{
+	int		ret = 0;
+	unsigned long	flags;
+	struct usb_phy	*phy;
+
+	if (x && x->type != USB_PHY_TYPE_UNDEFINED) {
+		dev_err(x->dev, "not accepting initialized PHY %s\n", x->label);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&phy_lock, flags);
+
+	list_for_each_entry(phy, &phy_list, head) {
+		if (phy->type == type) {
+			ret = -EBUSY;
+			dev_err(x->dev, "transceiver type %s already exists\n",
+						usb_phy_type_string(type));
+			goto out;
+		}
+	}
+
+	x->type = type;
+	list_add_tail(&x->head, &phy_list);
+
+out:
+	spin_unlock_irqrestore(&phy_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(usb_add_phy);
+
+/**
+ * usb_remove_phy - remove the OTG PHY
+ * @x: the USB OTG PHY to be removed;
+ *
+ * This reverts the effects of usb_add_phy
+ */
+void usb_remove_phy(struct usb_phy *x)
 {
-	if (phy && x)
-		return -EBUSY;
-	phy = x;
-	return 0;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&phy_lock, flags);
+	if (x)
+		list_del(&x->head);
+	spin_unlock_irqrestore(&phy_lock, flags);
 }
-EXPORT_SYMBOL(usb_set_transceiver);
+EXPORT_SYMBOL(usb_remove_phy);
 
 const char *otg_state_string(enum usb_otg_state state)
 {
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index c4a86da858e2..523cad5bfea9 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -33,11 +33,11 @@
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/usb/otg.h>
+#include <linux/usb/musb-omap.h>
 #include <linux/usb/ulpi.h>
 #include <linux/i2c/twl.h>
 #include <linux/regulator/consumer.h>
 #include <linux/err.h>
-#include <linux/notifier.h>
 #include <linux/slab.h>
 
 /* Register defines */
@@ -159,7 +159,7 @@ struct twl4030_usb {
 	enum twl4030_usb_mode	usb_mode;
 
 	int			irq;
-	u8			linkstat;
+	enum omap_musb_vbus_id_status linkstat;
 	bool			vbus_supplied;
 	u8			asleep;
 	bool			irq_enabled;
@@ -246,11 +246,11 @@ twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
 
 /*-------------------------------------------------------------------------*/
 
-static enum usb_phy_events twl4030_usb_linkstat(struct twl4030_usb *twl)
+static enum omap_musb_vbus_id_status
+	twl4030_usb_linkstat(struct twl4030_usb *twl)
 {
 	int	status;
-	int	linkstat = USB_EVENT_NONE;
-	struct usb_otg *otg = twl->phy.otg;
+	enum omap_musb_vbus_id_status linkstat = OMAP_MUSB_UNKNOWN;
 
 	twl->vbus_supplied = false;
 
@@ -273,30 +273,23 @@ static enum usb_phy_events twl4030_usb_linkstat(struct twl4030_usb *twl)
                         twl->vbus_supplied = true;
 
 		if (status & BIT(2))
-			linkstat = USB_EVENT_ID;
+			linkstat = OMAP_MUSB_ID_GROUND;
 		else
-			linkstat = USB_EVENT_VBUS;
-	} else
-		linkstat = USB_EVENT_NONE;
+			linkstat = OMAP_MUSB_VBUS_VALID;
+	} else {
+		if (twl->linkstat != OMAP_MUSB_UNKNOWN)
+			linkstat = OMAP_MUSB_VBUS_OFF;
+	}
 
 	dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
 			status, status, linkstat);
 
-	twl->phy.last_event = linkstat;
-
 	/* REVISIT this assumes host and peripheral controllers
 	 * are registered, and that both are active...
 	 */
 
 	spin_lock_irq(&twl->lock);
 	twl->linkstat = linkstat;
-	if (linkstat == USB_EVENT_ID) {
-		otg->default_a = true;
-		twl->phy.state = OTG_STATE_A_IDLE;
-	} else {
-		otg->default_a = false;
-		twl->phy.state = OTG_STATE_B_IDLE;
-	}
 	spin_unlock_irq(&twl->lock);
 
 	return linkstat;
@@ -501,10 +494,10 @@ static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
 static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
 {
 	struct twl4030_usb *twl = _twl;
-	int status;
+	enum omap_musb_vbus_id_status status;
 
 	status = twl4030_usb_linkstat(twl);
-	if (status >= 0) {
+	if (status > 0) {
 		/* FIXME add a set_power() method so that B-devices can
 		 * configure the charger appropriately.  It's not always
 		 * correct to consume VBUS power, and how much current to
@@ -516,13 +509,13 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
 		 * USB_LINK_VBUS state.  musb_hdrc won't care until it
 		 * starts to handle softconnect right.
 		 */
-		if (status == USB_EVENT_NONE)
+		if (status == OMAP_MUSB_VBUS_OFF ||
+				status == OMAP_MUSB_ID_FLOAT)
 			twl4030_phy_suspend(twl, 0);
 		else
 			twl4030_phy_resume(twl);
 
-		atomic_notifier_call_chain(&twl->phy.notifier, status,
-				twl->phy.otg->gadget);
+		omap_musb_mailbox(twl->linkstat);
 	}
 	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
 
@@ -531,11 +524,12 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
 
 static void twl4030_usb_phy_init(struct twl4030_usb *twl)
 {
-	int status;
+	enum omap_musb_vbus_id_status status;
 
 	status = twl4030_usb_linkstat(twl);
-	if (status >= 0) {
-		if (status == USB_EVENT_NONE) {
+	if (status > 0) {
+		if (status == OMAP_MUSB_VBUS_OFF ||
+				status == OMAP_MUSB_ID_FLOAT) {
 			__twl4030_phy_power(twl, 0);
 			twl->asleep = 1;
 		} else {
@@ -543,8 +537,7 @@ static void twl4030_usb_phy_init(struct twl4030_usb *twl)
 			twl->asleep = 0;
 		}
 
-		atomic_notifier_call_chain(&twl->phy.notifier, status,
-				twl->phy.otg->gadget);
+		omap_musb_mailbox(twl->linkstat);
 	}
 	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
 }
@@ -598,21 +591,20 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	twl = kzalloc(sizeof *twl, GFP_KERNEL);
+	twl = devm_kzalloc(&pdev->dev, sizeof *twl, GFP_KERNEL);
 	if (!twl)
 		return -ENOMEM;
 
-	otg = kzalloc(sizeof *otg, GFP_KERNEL);
-	if (!otg) {
-		kfree(twl);
+	otg = devm_kzalloc(&pdev->dev, sizeof *otg, GFP_KERNEL);
+	if (!otg)
 		return -ENOMEM;
-	}
 
 	twl->dev		= &pdev->dev;
 	twl->irq		= platform_get_irq(pdev, 0);
 	twl->usb_mode		= pdata->usb_mode;
 	twl->vbus_supplied	= false;
 	twl->asleep		= 1;
+	twl->linkstat		= OMAP_MUSB_UNKNOWN;
 
 	twl->phy.dev		= twl->dev;
 	twl->phy.label		= "twl4030";
@@ -629,18 +621,14 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 	err = twl4030_usb_ldo_init(twl);
 	if (err) {
 		dev_err(&pdev->dev, "ldo init failed\n");
-		kfree(otg);
-		kfree(twl);
 		return err;
 	}
-	usb_set_transceiver(&twl->phy);
+	usb_add_phy(&twl->phy, USB_PHY_TYPE_USB2);
 
 	platform_set_drvdata(pdev, twl);
 	if (device_create_file(&pdev->dev, &dev_attr_vbus))
 		dev_warn(&pdev->dev, "could not create sysfs file\n");
 
-	ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
-
 	/* Our job is to use irqs and status from the power module
 	 * to keep the transceiver disabled when nothing's connected.
 	 *
@@ -651,13 +639,11 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 	 */
 	twl->irq_enabled = true;
 	status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq,
-			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
-			"twl4030_usb", twl);
+			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+			IRQF_ONESHOT, "twl4030_usb", twl);
 	if (status < 0) {
 		dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
 			twl->irq, status);
-		kfree(otg);
-		kfree(twl);
 		return status;
 	}
 
@@ -701,9 +687,6 @@ static int __exit twl4030_usb_remove(struct platform_device *pdev)
 	regulator_put(twl->usb1v8);
 	regulator_put(twl->usb3v1);
 
-	kfree(twl->phy.otg);
-	kfree(twl);
-
 	return 0;
 }
 
diff --git a/drivers/usb/otg/twl6030-usb.c b/drivers/usb/otg/twl6030-usb.c
index 0eabb049b6a9..6907d8df7a27 100644
--- a/drivers/usb/otg/twl6030-usb.c
+++ b/drivers/usb/otg/twl6030-usb.c
@@ -26,10 +26,10 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/usb/otg.h>
+#include <linux/usb/musb-omap.h>
 #include <linux/i2c/twl.h>
 #include <linux/regulator/consumer.h>
 #include <linux/err.h>
-#include <linux/notifier.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 
@@ -100,7 +100,7 @@ struct twl6030_usb {
 
 	int			irq1;
 	int			irq2;
-	u8			linkstat;
+	enum omap_musb_vbus_id_status linkstat;
 	u8			asleep;
 	bool			irq_enabled;
 	bool			vbus_enable;
@@ -147,7 +147,7 @@ static int twl6030_phy_init(struct usb_phy *x)
 	dev  = twl->dev;
 	pdata = dev->platform_data;
 
-	if (twl->linkstat == USB_EVENT_ID)
+	if (twl->linkstat == OMAP_MUSB_ID_GROUND)
 		pdata->phy_power(twl->dev, 1, 1);
 	else
 		pdata->phy_power(twl->dev, 0, 1);
@@ -235,13 +235,13 @@ static ssize_t twl6030_usb_vbus_show(struct device *dev,
 	spin_lock_irqsave(&twl->lock, flags);
 
 	switch (twl->linkstat) {
-	case USB_EVENT_VBUS:
+	case OMAP_MUSB_VBUS_VALID:
 	       ret = snprintf(buf, PAGE_SIZE, "vbus\n");
 	       break;
-	case USB_EVENT_ID:
+	case OMAP_MUSB_ID_GROUND:
 	       ret = snprintf(buf, PAGE_SIZE, "id\n");
 	       break;
-	case USB_EVENT_NONE:
+	case OMAP_MUSB_VBUS_OFF:
 	       ret = snprintf(buf, PAGE_SIZE, "none\n");
 	       break;
 	default:
@@ -256,8 +256,7 @@ static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
 static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
 {
 	struct twl6030_usb *twl = _twl;
-	struct usb_otg *otg = twl->phy.otg;
-	int status;
+	enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
 	u8 vbus_state, hw_state;
 
 	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
@@ -268,22 +267,18 @@ static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
 		if (vbus_state & VBUS_DET) {
 			regulator_enable(twl->usb3v3);
 			twl->asleep = 1;
-			status = USB_EVENT_VBUS;
-			otg->default_a = false;
-			twl->phy.state = OTG_STATE_B_IDLE;
+			status = OMAP_MUSB_VBUS_VALID;
 			twl->linkstat = status;
-			twl->phy.last_event = status;
-			atomic_notifier_call_chain(&twl->phy.notifier,
-						status, otg->gadget);
+			omap_musb_mailbox(status);
 		} else {
-			status = USB_EVENT_NONE;
-			twl->linkstat = status;
-			twl->phy.last_event = status;
-			atomic_notifier_call_chain(&twl->phy.notifier,
-						status, otg->gadget);
-			if (twl->asleep) {
-				regulator_disable(twl->usb3v3);
-				twl->asleep = 0;
+			if (twl->linkstat != OMAP_MUSB_UNKNOWN) {
+				status = OMAP_MUSB_VBUS_OFF;
+				twl->linkstat = status;
+				omap_musb_mailbox(status);
+				if (twl->asleep) {
+					regulator_disable(twl->usb3v3);
+					twl->asleep = 0;
+				}
 			}
 		}
 	}
@@ -295,8 +290,7 @@ static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
 static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
 {
 	struct twl6030_usb *twl = _twl;
-	struct usb_otg *otg = twl->phy.otg;
-	int status = USB_EVENT_NONE;
+	enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN;
 	u8 hw_state;
 
 	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
@@ -307,13 +301,9 @@ static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
 		twl->asleep = 1;
 		twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
 		twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
-		status = USB_EVENT_ID;
-		otg->default_a = true;
-		twl->phy.state = OTG_STATE_A_IDLE;
+		status = OMAP_MUSB_ID_GROUND;
 		twl->linkstat = status;
-		twl->phy.last_event = status;
-		atomic_notifier_call_chain(&twl->phy.notifier, status,
-							otg->gadget);
+		omap_musb_mailbox(status);
 	} else  {
 		twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
 		twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
@@ -402,20 +392,19 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	pdata = dev->platform_data;
 
-	twl = kzalloc(sizeof *twl, GFP_KERNEL);
+	twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL);
 	if (!twl)
 		return -ENOMEM;
 
-	otg = kzalloc(sizeof *otg, GFP_KERNEL);
-	if (!otg) {
-		kfree(twl);
+	otg = devm_kzalloc(dev, sizeof *otg, GFP_KERNEL);
+	if (!otg)
 		return -ENOMEM;
-	}
 
 	twl->dev		= &pdev->dev;
 	twl->irq1		= platform_get_irq(pdev, 0);
 	twl->irq2		= platform_get_irq(pdev, 1);
 	twl->features		= pdata->features;
+	twl->linkstat		= OMAP_MUSB_UNKNOWN;
 
 	twl->phy.dev		= twl->dev;
 	twl->phy.label		= "twl6030";
@@ -436,18 +425,14 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
 	err = twl6030_usb_ldo_init(twl);
 	if (err) {
 		dev_err(&pdev->dev, "ldo init failed\n");
-		kfree(otg);
-		kfree(twl);
 		return err;
 	}
-	usb_set_transceiver(&twl->phy);
+	usb_add_phy(&twl->phy, USB_PHY_TYPE_USB2);
 
 	platform_set_drvdata(pdev, twl);
 	if (device_create_file(&pdev->dev, &dev_attr_vbus))
 		dev_warn(&pdev->dev, "could not create sysfs file\n");
 
-	ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
-
 	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
 
 	twl->irq_enabled = true;
@@ -458,8 +443,6 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
 			twl->irq1, status);
 		device_remove_file(twl->dev, &dev_attr_vbus);
-		kfree(otg);
-		kfree(twl);
 		return status;
 	}
 
@@ -471,8 +454,6 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
 			twl->irq2, status);
 		free_irq(twl->irq1, twl);
 		device_remove_file(twl->dev, &dev_attr_vbus);
-		kfree(otg);
-		kfree(twl);
 		return status;
 	}
 
@@ -503,8 +484,6 @@ static int __exit twl6030_usb_remove(struct platform_device *pdev)
 	pdata->phy_exit(twl->dev);
 	device_remove_file(twl->dev, &dev_attr_vbus);
 	cancel_work_sync(&twl->set_vbus_work);
-	kfree(twl->phy.otg);
-	kfree(twl);
 
 	return 0;
 }