Merge tag 'usb-for-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v4.2 merge window

- dwc2 adds hibernation support
- preparation for sunxi glue to musb driver
- new ULPI bus
- new ULPI PHY driver for TUSB1210
- musb patches to support multiple DMA engines on same binary
- support for R-Car E2 on renesas_usbhs

Signed-off-by: Felipe Balbi <balbi@ti.com>

65 files changed, 3397 insertions, 1265 deletions

diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
index ca2f8bd..6bbb3ec 100644
--- a/drivers/usb/common/Makefile
+++ b/drivers/usb/common/Makefile
@@ -7,3 +7,4 @@ usb-common-y			  += common.o
 usb-common-$(CONFIG_USB_LED_TRIG) += led.o
 
 obj-$(CONFIG_USB_OTG_FSM) += usb-otg-fsm.o
+obj-$(CONFIG_USB_ULPI_BUS)	+= ulpi.o
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
new file mode 100644
index 0000000..0e6f968
--- /dev/null
+++ b/drivers/usb/common/ulpi.c
@@ -0,0 +1,255 @@
+/**
+ * ulpi.c - USB ULPI PHY bus
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ulpi/interface.h>
+#include <linux/ulpi/driver.h>
+#include <linux/ulpi/regs.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+
+/* -------------------------------------------------------------------------- */
+
+int ulpi_read(struct ulpi *ulpi, u8 addr)
+{
+	return ulpi->ops->read(ulpi->ops, addr);
+}
+EXPORT_SYMBOL_GPL(ulpi_read);
+
+int ulpi_write(struct ulpi *ulpi, u8 addr, u8 val)
+{
+	return ulpi->ops->write(ulpi->ops, addr, val);
+}
+EXPORT_SYMBOL_GPL(ulpi_write);
+
+/* -------------------------------------------------------------------------- */
+
+static int ulpi_match(struct device *dev, struct device_driver *driver)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(driver);
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+	const struct ulpi_device_id *id;
+
+	for (id = drv->id_table; id->vendor; id++)
+		if (id->vendor == ulpi->id.vendor &&
+		    id->product == ulpi->id.product)
+			return 1;
+
+	return 0;
+}
+
+static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+
+	if (add_uevent_var(env, "MODALIAS=ulpi:v%04xp%04x",
+			   ulpi->id.vendor, ulpi->id.product))
+		return -ENOMEM;
+	return 0;
+}
+
+static int ulpi_probe(struct device *dev)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
+
+	return drv->probe(to_ulpi_dev(dev));
+}
+
+static int ulpi_remove(struct device *dev)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
+
+	if (drv->remove)
+		drv->remove(to_ulpi_dev(dev));
+
+	return 0;
+}
+
+static struct bus_type ulpi_bus = {
+	.name = "ulpi",
+	.match = ulpi_match,
+	.uevent = ulpi_uevent,
+	.probe = ulpi_probe,
+	.remove = ulpi_remove,
+};
+
+/* -------------------------------------------------------------------------- */
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+
+	return sprintf(buf, "ulpi:v%04xp%04x\n",
+		       ulpi->id.vendor, ulpi->id.product);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *ulpi_dev_attrs[] = {
+	&dev_attr_modalias.attr,
+	NULL
+};
+
+static struct attribute_group ulpi_dev_attr_group = {
+	.attrs = ulpi_dev_attrs,
+};
+
+static const struct attribute_group *ulpi_dev_attr_groups[] = {
+	&ulpi_dev_attr_group,
+	NULL
+};
+
+static void ulpi_dev_release(struct device *dev)
+{
+	kfree(to_ulpi_dev(dev));
+}
+
+static struct device_type ulpi_dev_type = {
+	.name = "ulpi_device",
+	.groups = ulpi_dev_attr_groups,
+	.release = ulpi_dev_release,
+};
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * ulpi_register_driver - register a driver with the ULPI bus
+ * @drv: driver being registered
+ *
+ * Registers a driver with the ULPI bus.
+ */
+int ulpi_register_driver(struct ulpi_driver *drv)
+{
+	if (!drv->probe)
+		return -EINVAL;
+
+	drv->driver.bus = &ulpi_bus;
+
+	return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(ulpi_register_driver);
+
+/**
+ * ulpi_unregister_driver - unregister a driver with the ULPI bus
+ * @drv: driver to unregister
+ *
+ * Unregisters a driver with the ULPI bus.
+ */
+void ulpi_unregister_driver(struct ulpi_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(ulpi_unregister_driver);
+
+/* -------------------------------------------------------------------------- */
+
+static int ulpi_register(struct device *dev, struct ulpi *ulpi)
+{
+	int ret;
+
+	/* Test the interface */
+	ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa);
+	if (ret < 0)
+		return ret;
+
+	ret = ulpi_read(ulpi, ULPI_SCRATCH);
+	if (ret < 0)
+		return ret;
+
+	if (ret != 0xaa)
+		return -ENODEV;
+
+	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);
+	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;
+
+	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
+	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
+
+	ulpi->dev.parent = dev;
+	ulpi->dev.bus = &ulpi_bus;
+	ulpi->dev.type = &ulpi_dev_type;
+	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
+
+	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
+
+	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
+
+	ret = device_register(&ulpi->dev);
+	if (ret)
+		return ret;
+
+	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
+		ulpi->id.vendor, ulpi->id.product);
+
+	return 0;
+}
+
+/**
+ * ulpi_register_interface - instantiate new ULPI device
+ * @dev: USB controller's device interface
+ * @ops: ULPI register access
+ *
+ * Allocates and registers a ULPI device and an interface for it. Called from
+ * the USB controller that provides the ULPI interface.
+ */
+struct ulpi *ulpi_register_interface(struct device *dev, struct ulpi_ops *ops)
+{
+	struct ulpi *ulpi;
+	int ret;
+
+	ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
+	if (!ulpi)
+		return ERR_PTR(-ENOMEM);
+
+	ulpi->ops = ops;
+	ops->dev = dev;
+
+	ret = ulpi_register(dev, ulpi);
+	if (ret) {
+		kfree(ulpi);
+		return ERR_PTR(ret);
+	}
+
+	return ulpi;
+}
+EXPORT_SYMBOL_GPL(ulpi_register_interface);
+
+/**
+ * ulpi_unregister_interface - unregister ULPI interface
+ * @intrf: struct ulpi_interface
+ *
+ * Unregisters a ULPI device and it's interface that was created with
+ * ulpi_create_interface().
+ */
+void ulpi_unregister_interface(struct ulpi *ulpi)
+{
+	device_unregister(&ulpi->dev);
+}
+EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
+
+/* -------------------------------------------------------------------------- */
+
+static int __init ulpi_init(void)
+{
+	return bus_register(&ulpi_bus);
+}
+module_init(ulpi_init);
+
+static void __exit ulpi_exit(void)
+{
+	bus_unregister(&ulpi_bus);
+}
+module_exit(ulpi_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("USB ULPI PHY bus");
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index cc0ced0..a99c89e 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -84,3 +84,23 @@ config USB_OTG_FSM
 	  Implements OTG Finite State Machine as specified in On-The-Go
 	  and Embedded Host Supplement to the USB Revision 2.0 Specification.
 
+config USB_ULPI_BUS
+	tristate "USB ULPI PHY interface support"
+	depends on USB_SUPPORT
+	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.
diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig
index 1bcb36a..fd95ba6 100644
--- a/drivers/usb/dwc2/Kconfig
+++ b/drivers/usb/dwc2/Kconfig
@@ -50,18 +50,10 @@ config USB_DWC2_DUAL_ROLE
 	  option requires USB_GADGET to be enabled.
 endchoice
 
-config USB_DWC2_PLATFORM
-	tristate "DWC2 Platform"
-	default USB_DWC2_HOST || USB_DWC2_PERIPHERAL
-        help
-          The Designware USB2.0 platform interface module for
-          controllers directly connected to the CPU.
-
 config USB_DWC2_PCI
 	tristate "DWC2 PCI"
 	depends on PCI
 	default n
-	select USB_DWC2_PLATFORM
 	select NOP_USB_XCEIV
 	help
 	  The Designware USB2.0 PCI interface module for controllers
diff --git a/drivers/usb/dwc2/Makefile b/drivers/usb/dwc2/Makefile
index f07b425..50fdaac 100644
--- a/drivers/usb/dwc2/Makefile
+++ b/drivers/usb/dwc2/Makefile
@@ -2,7 +2,7 @@ ccflags-$(CONFIG_USB_DWC2_DEBUG)	+= -DDEBUG
 ccflags-$(CONFIG_USB_DWC2_VERBOSE)	+= -DVERBOSE_DEBUG
 
 obj-$(CONFIG_USB_DWC2)			+= dwc2.o
-dwc2-y					:= core.o core_intr.o
+dwc2-y					:= core.o core_intr.o platform.o
 
 ifneq ($(filter y,$(CONFIG_USB_DWC2_HOST) $(CONFIG_USB_DWC2_DUAL_ROLE)),)
 	dwc2-y				+= hcd.o hcd_intr.o
@@ -13,6 +13,10 @@ ifneq ($(filter y,$(CONFIG_USB_DWC2_PERIPHERAL) $(CONFIG_USB_DWC2_DUAL_ROLE)),)
 	dwc2-y       			+= gadget.o
 endif
 
+ifneq ($(CONFIG_DEBUG_FS),)
+	dwc2-y				+= debugfs.o
+endif
+
 # NOTE: The previous s3c-hsotg peripheral mode only driver has been moved to
 # this location and renamed gadget.c. When building for dynamically linked
 # modules, dwc2.ko will get built for host mode, peripheral mode, and dual-role
@@ -21,6 +25,3 @@ endif
 
 obj-$(CONFIG_USB_DWC2_PCI)		+= dwc2_pci.o
 dwc2_pci-y				:= pci.o
-
-obj-$(CONFIG_USB_DWC2_PLATFORM)		+= dwc2_platform.o
-dwc2_platform-y				:= platform.o
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index d5197d4..e5b546f 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -56,6 +56,389 @@
 #include "core.h"
 #include "hcd.h"
 
+#if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+/**
+ * dwc2_backup_host_registers() - Backup controller host registers.
+ * When suspending usb bus, registers needs to be backuped
+ * if controller power is disabled once suspended.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hregs_backup *hr;
+	int i;
+
+	dev_dbg(hsotg->dev, "%s\n", __func__);
+
+	/* Backup Host regs */
+	hr = hsotg->hr_backup;
+	if (!hr) {
+		hr = devm_kzalloc(hsotg->dev, sizeof(*hr), GFP_KERNEL);
+		if (!hr) {
+			dev_err(hsotg->dev, "%s: can't allocate host regs\n",
+					__func__);
+			return -ENOMEM;
+		}
+
+		hsotg->hr_backup = hr;
+	}
+	hr->hcfg = readl(hsotg->regs + HCFG);
+	hr->haintmsk = readl(hsotg->regs + HAINTMSK);
+	for (i = 0; i < hsotg->core_params->host_channels; ++i)
+		hr->hcintmsk[i] = readl(hsotg->regs + HCINTMSK(i));
+
+	hr->hprt0 = readl(hsotg->regs + HPRT0);
+	hr->hfir = readl(hsotg->regs + HFIR);
+
+	return 0;
+}
+
+/**
+ * dwc2_restore_host_registers() - Restore controller host registers.
+ * When resuming usb bus, device registers needs to be restored
+ * if controller power were disabled.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_hregs_backup *hr;
+	int i;
+
+	dev_dbg(hsotg->dev, "%s\n", __func__);
+
+	/* Restore host regs */
+	hr = hsotg->hr_backup;
+	if (!hr) {
+		dev_err(hsotg->dev, "%s: no host registers to restore\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	writel(hr->hcfg, hsotg->regs + HCFG);
+	writel(hr->haintmsk, hsotg->regs + HAINTMSK);
+
+	for (i = 0; i < hsotg->core_params->host_channels; ++i)
+		writel(hr->hcintmsk[i], hsotg->regs + HCINTMSK(i));
+
+	writel(hr->hprt0, hsotg->regs + HPRT0);
+	writel(hr->hfir, hsotg->regs + HFIR);
+
+	return 0;
+}
+#else
+static inline int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+
+static inline int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+#endif
+
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+/**
+ * dwc2_backup_device_registers() - Backup controller device registers.
+ * When suspending usb bus, registers needs to be backuped
+ * if controller power is disabled once suspended.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_dregs_backup *dr;
+	int i;
+
+	dev_dbg(hsotg->dev, "%s\n", __func__);
+
+	/* Backup dev regs */
+	dr = hsotg->dr_backup;
+	if (!dr) {
+		dr = devm_kzalloc(hsotg->dev, sizeof(*dr), GFP_KERNEL);
+		if (!dr) {
+			dev_err(hsotg->dev, "%s: can't allocate device regs\n",
+					__func__);
+			return -ENOMEM;
+		}
+
+		hsotg->dr_backup = dr;
+	}
+
+	dr->dcfg = readl(hsotg->regs + DCFG);
+	dr->dctl = readl(hsotg->regs + DCTL);
+	dr->daintmsk = readl(hsotg->regs + DAINTMSK);
+	dr->diepmsk = readl(hsotg->regs + DIEPMSK);
+	dr->doepmsk = readl(hsotg->regs + DOEPMSK);
+
+	for (i = 0; i < hsotg->num_of_eps; i++) {
+		/* Backup IN EPs */
+		dr->diepctl[i] = readl(hsotg->regs + DIEPCTL(i));
+
+		/* Ensure DATA PID is correctly configured */
+		if (dr->diepctl[i] & DXEPCTL_DPID)
+			dr->diepctl[i] |= DXEPCTL_SETD1PID;
+		else
+			dr->diepctl[i] |= DXEPCTL_SETD0PID;
+
+		dr->dieptsiz[i] = readl(hsotg->regs + DIEPTSIZ(i));
+		dr->diepdma[i] = readl(hsotg->regs + DIEPDMA(i));
+
+		/* Backup OUT EPs */
+		dr->doepctl[i] = readl(hsotg->regs + DOEPCTL(i));
+
+		/* Ensure DATA PID is correctly configured */
+		if (dr->doepctl[i] & DXEPCTL_DPID)
+			dr->doepctl[i] |= DXEPCTL_SETD1PID;
+		else
+			dr->doepctl[i] |= DXEPCTL_SETD0PID;
+
+		dr->doeptsiz[i] = readl(hsotg->regs + DOEPTSIZ(i));
+		dr->doepdma[i] = readl(hsotg->regs + DOEPDMA(i));
+	}
+
+	return 0;
+}
+
+/**
+ * dwc2_restore_device_registers() - Restore controller device registers.
+ * When resuming usb bus, device registers needs to be restored
+ * if controller power were disabled.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_dregs_backup *dr;
+	u32 dctl;
+	int i;
+
+	dev_dbg(hsotg->dev, "%s\n", __func__);
+
+	/* Restore dev regs */
+	dr = hsotg->dr_backup;
+	if (!dr) {
+		dev_err(hsotg->dev, "%s: no device registers to restore\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	writel(dr->dcfg, hsotg->regs + DCFG);
+	writel(dr->dctl, hsotg->regs + DCTL);
+	writel(dr->daintmsk, hsotg->regs + DAINTMSK);
+	writel(dr->diepmsk, hsotg->regs + DIEPMSK);
+	writel(dr->doepmsk, hsotg->regs + DOEPMSK);
+
+	for (i = 0; i < hsotg->num_of_eps; i++) {
+		/* Restore IN EPs */
+		writel(dr->diepctl[i], hsotg->regs + DIEPCTL(i));
+		writel(dr->dieptsiz[i], hsotg->regs + DIEPTSIZ(i));
+		writel(dr->diepdma[i], hsotg->regs + DIEPDMA(i));
+
+		/* Restore OUT EPs */
+		writel(dr->doepctl[i], hsotg->regs + DOEPCTL(i));
+		writel(dr->doeptsiz[i], hsotg->regs + DOEPTSIZ(i));
+		writel(dr->doepdma[i], hsotg->regs + DOEPDMA(i));
+	}
+
+	/* Set the Power-On Programming done bit */
+	dctl = readl(hsotg->regs + DCTL);
+	dctl |= DCTL_PWRONPRGDONE;
+	writel(dctl, hsotg->regs + DCTL);
+
+	return 0;
+}
+#else
+static inline int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+
+static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+#endif
+
+/**
+ * dwc2_backup_global_registers() - Backup global controller registers.
+ * When suspending usb bus, registers needs to be backuped
+ * if controller power is disabled once suspended.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_backup_global_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_gregs_backup *gr;
+	int i;
+
+	/* Backup global regs */
+	gr = hsotg->gr_backup;
+	if (!gr) {
+		gr = devm_kzalloc(hsotg->dev, sizeof(*gr), GFP_KERNEL);
+		if (!gr) {
+			dev_err(hsotg->dev, "%s: can't allocate global regs\n",
+					__func__);
+			return -ENOMEM;
+		}
+
+		hsotg->gr_backup = gr;
+	}
+
+	gr->gotgctl = readl(hsotg->regs + GOTGCTL);
+	gr->gintmsk = readl(hsotg->regs + GINTMSK);
+	gr->gahbcfg = readl(hsotg->regs + GAHBCFG);
+	gr->gusbcfg = readl(hsotg->regs + GUSBCFG);
+	gr->grxfsiz = readl(hsotg->regs + GRXFSIZ);
+	gr->gnptxfsiz = readl(hsotg->regs + GNPTXFSIZ);
+	gr->hptxfsiz = readl(hsotg->regs + HPTXFSIZ);
+	gr->gdfifocfg = readl(hsotg->regs + GDFIFOCFG);
+	for (i = 0; i < MAX_EPS_CHANNELS; i++)
+		gr->dtxfsiz[i] = readl(hsotg->regs + DPTXFSIZN(i));
+
+	return 0;
+}
+
+/**
+ * dwc2_restore_global_registers() - Restore controller global registers.
+ * When resuming usb bus, device registers needs to be restored
+ * if controller power were disabled.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_gregs_backup *gr;
+	int i;
+
+	dev_dbg(hsotg->dev, "%s\n", __func__);
+
+	/* Restore global regs */
+	gr = hsotg->gr_backup;
+	if (!gr) {
+		dev_err(hsotg->dev, "%s: no global registers to restore\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	writel(0xffffffff, hsotg->regs + GINTSTS);
+	writel(gr->gotgctl, hsotg->regs + GOTGCTL);
+	writel(gr->gintmsk, hsotg->regs + GINTMSK);
+	writel(gr->gusbcfg, hsotg->regs + GUSBCFG);
+	writel(gr->gahbcfg, hsotg->regs + GAHBCFG);
+	writel(gr->grxfsiz, hsotg->regs + GRXFSIZ);
+	writel(gr->gnptxfsiz, hsotg->regs + GNPTXFSIZ);
+	writel(gr->hptxfsiz, hsotg->regs + HPTXFSIZ);
+	writel(gr->gdfifocfg, hsotg->regs + GDFIFOCFG);
+	for (i = 0; i < MAX_EPS_CHANNELS; i++)
+		writel(gr->dtxfsiz[i], hsotg->regs + DPTXFSIZN(i));
+
+	return 0;
+}
+
+/**
+ * dwc2_exit_hibernation() - Exit controller from Partial Power Down.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ * @restore: Controller registers need to be restored
+ */
+int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore)
+{
+	u32 pcgcctl;
+	int ret = 0;
+
+	if (!hsotg->core_params->hibernation)
+		return -ENOTSUPP;
+
+	pcgcctl = readl(hsotg->regs + PCGCTL);
+	pcgcctl &= ~PCGCTL_STOPPCLK;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+
+	pcgcctl = readl(hsotg->regs + PCGCTL);
+	pcgcctl &= ~PCGCTL_PWRCLMP;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+
+	pcgcctl = readl(hsotg->regs + PCGCTL);
+	pcgcctl &= ~PCGCTL_RSTPDWNMODULE;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+
+	udelay(100);
+	if (restore) {
+		ret = dwc2_restore_global_registers(hsotg);
+		if (ret) {
+			dev_err(hsotg->dev, "%s: failed to restore registers\n",
+					__func__);
+			return ret;
+		}
+		if (dwc2_is_host_mode(hsotg)) {
+			ret = dwc2_restore_host_registers(hsotg);
+			if (ret) {
+				dev_err(hsotg->dev, "%s: failed to restore host registers\n",
+						__func__);
+				return ret;
+			}
+		} else {
+			ret = dwc2_restore_device_registers(hsotg);
+			if (ret) {
+				dev_err(hsotg->dev, "%s: failed to restore device registers\n",
+						__func__);
+				return ret;
+			}
+		}
+	}
+
+	return ret;
+}
+
+/**
+ * dwc2_enter_hibernation() - Put controller in Partial Power Down.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg)
+{
+	u32 pcgcctl;
+	int ret = 0;
+
+	if (!hsotg->core_params->hibernation)
+		return -ENOTSUPP;
+
+	/* Backup all registers */
+	ret = dwc2_backup_global_registers(hsotg);
+	if (ret) {
+		dev_err(hsotg->dev, "%s: failed to backup global registers\n",
+				__func__);
+		return ret;
+	}
+
+	if (dwc2_is_host_mode(hsotg)) {
+		ret = dwc2_backup_host_registers(hsotg);
+		if (ret) {
+			dev_err(hsotg->dev, "%s: failed to backup host registers\n",
+					__func__);
+			return ret;
+		}
+	} else {
+		ret = dwc2_backup_device_registers(hsotg);
+		if (ret) {
+			dev_err(hsotg->dev, "%s: failed to backup device registers\n",
+					__func__);
+			return ret;
+		}
+	}
+
+	/* Put the controller in low power state */
+	pcgcctl = readl(hsotg->regs + PCGCTL);
+
+	pcgcctl |= PCGCTL_PWRCLMP;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+	ndelay(20);
+
+	pcgcctl |= PCGCTL_RSTPDWNMODULE;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+	ndelay(20);
+
+	pcgcctl |= PCGCTL_STOPPCLK;
+	writel(pcgcctl, hsotg->regs + PCGCTL);
+
+	return ret;
+}
+
 /**
  * dwc2_enable_common_interrupts() - Initializes the commmon interrupts,
  * used in both device and host modes
@@ -77,8 +460,10 @@ static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
 
 	if (hsotg->core_params->dma_enable <= 0)
 		intmsk |= GINTSTS_RXFLVL;
+	if (hsotg->core_params->external_id_pin_ctl <= 0)
+		intmsk |= GINTSTS_CONIDSTSCHNG;
 
-	intmsk |= GINTSTS_CONIDSTSCHNG | GINTSTS_WKUPINT | GINTSTS_USBSUSP |
+	intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP |
 		  GINTSTS_SESSREQINT;
 
 	writel(intmsk, hsotg->regs + GINTMSK);
@@ -2602,6 +2987,40 @@ static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
 	hsotg->core_params->uframe_sched = val;
 }
 
+static void dwc2_set_param_external_id_pin_ctl(struct dwc2_hsotg *hsotg,
+		int val)
+{
+	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+		if (val >= 0) {
+			dev_err(hsotg->dev,
+				"'%d' invalid for parameter external_id_pin_ctl\n",
+				val);
+			dev_err(hsotg->dev, "external_id_pin_ctl must be 0 or 1\n");
+		}
+		val = 0;
+		dev_dbg(hsotg->dev, "Setting external_id_pin_ctl to %d\n", val);
+	}
+
+	hsotg->core_params->external_id_pin_ctl = val;
+}
+
+static void dwc2_set_param_hibernation(struct dwc2_hsotg *hsotg,
+		int val)
+{
+	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+		if (val >= 0) {
+			dev_err(hsotg->dev,
+				"'%d' invalid for parameter hibernation\n",
+				val);
+			dev_err(hsotg->dev, "hibernation must be 0 or 1\n");
+		}
+		val = 0;
+		dev_dbg(hsotg->dev, "Setting hibernation to %d\n", val);
+	}
+
+	hsotg->core_params->hibernation = val;
+}
+
 /*
  * This function is called during module intialization to pass module parameters
  * for the DWC_otg core.
@@ -2646,6 +3065,8 @@ void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
 	dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
 	dwc2_set_param_otg_ver(hsotg, params->otg_ver);
 	dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
+	dwc2_set_param_external_id_pin_ctl(hsotg, params->external_id_pin_ctl);
+	dwc2_set_param_hibernation(hsotg, params->hibernation);
 }
 
 /**
@@ -2814,6 +3235,22 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
 	return 0;
 }
 
+/*
+ * Sets all parameters to the given value.
+ *
+ * Assumes that the dwc2_core_params struct contains only integers.
+ */
+void dwc2_set_all_params(struct dwc2_core_params *params, int value)
+{
+	int *p = (int *)params;
+	size_t size = sizeof(*params) / sizeof(*p);
+	int i;
+
+	for (i = 0; i < size; i++)
+		p[i] = value;
+}
+
+
 u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
 {
 	return hsotg->core_params->otg_ver == 1 ? 0x0200 : 0x0103;
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 836c012..53b8de0 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -331,6 +331,17 @@ enum dwc2_ep0_state {
  *                      by the driver and are ignored in this
  *                      configuration value.
  * @uframe_sched:       True to enable the microframe scheduler
+ * @external_id_pin_ctl: Specifies whether ID pin is handled externally.
+ *                      Disable CONIDSTSCHNG controller interrupt in such
+ *                      case.
+ *                      0 - No (default)
+ *                      1 - Yes
+ * @hibernation:	Specifies whether the controller support hibernation.
+ *			If hibernation is enabled, the controller will enter
+ *			hibernation in both peripheral and host mode when
+ *			needed.
+ *			0 - No (default)
+ *			1 - Yes
  *
  * The following parameters may be specified when starting the module. These
  * parameters define how the DWC_otg controller should be configured. A
@@ -368,6 +379,8 @@ struct dwc2_core_params {
 	int reload_ctl;
 	int ahbcfg;
 	int uframe_sched;
+	int external_id_pin_ctl;
+	int hibernation;
 };
 
 /**
@@ -452,6 +465,82 @@ struct dwc2_hw_params {
 #define DWC2_CTRL_BUFF_SIZE 8
 
 /**
+ * struct dwc2_gregs_backup - Holds global registers state before entering partial
+ * power down
+ * @gotgctl:		Backup of GOTGCTL register
+ * @gintmsk:		Backup of GINTMSK register
+ * @gahbcfg:		Backup of GAHBCFG register
+ * @gusbcfg:		Backup of GUSBCFG register
+ * @grxfsiz:		Backup of GRXFSIZ register
+ * @gnptxfsiz:		Backup of GNPTXFSIZ register
+ * @gi2cctl:		Backup of GI2CCTL register
+ * @hptxfsiz:		Backup of HPTXFSIZ register
+ * @gdfifocfg:		Backup of GDFIFOCFG register
+ * @dtxfsiz:		Backup of DTXFSIZ registers for each endpoint
+ * @gpwrdn:		Backup of GPWRDN register
+ */
+struct dwc2_gregs_backup {
+	u32 gotgctl;
+	u32 gintmsk;
+	u32 gahbcfg;
+	u32 gusbcfg;
+	u32 grxfsiz;
+	u32 gnptxfsiz;
+	u32 gi2cctl;
+	u32 hptxfsiz;
+	u32 pcgcctl;
+	u32 gdfifocfg;
+	u32 dtxfsiz[MAX_EPS_CHANNELS];
+	u32 gpwrdn;
+};
+
+/**
+ * struct  dwc2_dregs_backup - Holds device registers state before entering partial
+ * power down
+ * @dcfg:		Backup of DCFG register
+ * @dctl:		Backup of DCTL register
+ * @daintmsk:		Backup of DAINTMSK register
+ * @diepmsk:		Backup of DIEPMSK register
+ * @doepmsk:		Backup of DOEPMSK register
+ * @diepctl:		Backup of DIEPCTL register
+ * @dieptsiz:		Backup of DIEPTSIZ register
+ * @diepdma:		Backup of DIEPDMA register
+ * @doepctl:		Backup of DOEPCTL register
+ * @doeptsiz:		Backup of DOEPTSIZ register
+ * @doepdma:		Backup of DOEPDMA register
+ */
+struct dwc2_dregs_backup {
+	u32 dcfg;
+	u32 dctl;
+	u32 daintmsk;
+	u32 diepmsk;
+	u32 doepmsk;
+	u32 diepctl[MAX_EPS_CHANNELS];
+	u32 dieptsiz[MAX_EPS_CHANNELS];
+	u32 diepdma[MAX_EPS_CHANNELS];
+	u32 doepctl[MAX_EPS_CHANNELS];
+	u32 doeptsiz[MAX_EPS_CHANNELS];
+	u32 doepdma[MAX_EPS_CHANNELS];
+};
+
+/**
+ * struct  dwc2_hregs_backup - Holds host registers state before entering partial
+ * power down
+ * @hcfg:		Backup of HCFG register
+ * @haintmsk:		Backup of HAINTMSK register
+ * @hcintmsk:		Backup of HCINTMSK register
+ * @hptr0:		Backup of HPTR0 register
+ * @hfir:		Backup of HFIR register
+ */
+struct dwc2_hregs_backup {
+	u32 hcfg;
+	u32 haintmsk;
+	u32 hcintmsk[MAX_EPS_CHANNELS];
+	u32 hprt0;
+	u32 hfir;
+};
+
+/**
  * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic
  * and periodic schedules
  *
@@ -481,6 +570,9 @@ struct dwc2_hw_params {
  *                      interrupt
  * @wkp_timer:          Timer object for handling Wakeup Detected interrupt
  * @lx_state:           Lx state of connected device
+ * @gregs_backup: Backup of global registers during suspend
+ * @dregs_backup: Backup of device registers during suspend
+ * @hregs_backup: Backup of host registers during suspend
  *
  * These are for host mode:
  *
@@ -613,11 +705,12 @@ struct dwc2_hsotg {
 	struct work_struct wf_otg;
 	struct timer_list wkp_timer;
 	enum dwc2_lx_state lx_state;
+	struct dwc2_gregs_backup *gr_backup;
+	struct dwc2_dregs_backup *dr_backup;
+	struct dwc2_hregs_backup *hr_backup;
 
 	struct dentry *debug_root;
-	struct dentry *debug_file;
-	struct dentry *debug_testmode;
-	struct dentry *debug_fifo;
+	struct debugfs_regset32 *regset;
 
 	/* DWC OTG HW Release versions */
 #define DWC2_CORE_REV_2_71a	0x4f54271a
@@ -751,6 +844,8 @@ enum dwc2_halt_status {
  * and the DWC_otg controller
  */
 extern void dwc2_core_host_init(struct dwc2_hsotg *hsotg);
+extern int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg);
+extern int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore);
 
 /*
  * Host core Functions.
@@ -983,6 +1078,15 @@ extern void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val);
 
 extern void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val);
 
+extern void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
+				const struct dwc2_core_params *params);
+
+extern void dwc2_set_all_params(struct dwc2_core_params *params, int value);
+
+extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
+
+
+
 /*
  * Dump core registers and SPRAM
  */
@@ -1005,6 +1109,8 @@ extern void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
 		bool reset);
 extern void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg);
 extern void s3c_hsotg_disconnect(struct dwc2_hsotg *dwc2);
+extern int s3c_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode);
+#define dwc2_is_device_connected(hsotg) (hsotg->connected)
 #else
 static inline int s3c_hsotg_remove(struct dwc2_hsotg *dwc2)
 { return 0; }
@@ -1018,6 +1124,10 @@ static inline void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
 		bool reset) {}
 static inline void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg) {}
 static inline void s3c_hsotg_disconnect(struct dwc2_hsotg *dwc2) {}
+static inline int s3c_hsotg_set_test_mode(struct dwc2_hsotg *hsotg,
+							int testmode)
+{ return 0; }
+#define dwc2_is_device_connected(hsotg) (0)
 #endif
 
 #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
@@ -1025,14 +1135,12 @@ extern int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg);
 extern void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg);
 extern void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
 #else
-static inline void dwc2_set_all_params(struct dwc2_core_params *params, int value) {}
 static inline int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
 { return 0; }
 static inline void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg) {}
 static inline void dwc2_hcd_start(struct dwc2_hsotg *hsotg) {}
 static inline void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) {}
-static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
-				const struct dwc2_core_params *params)
+static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 { return 0; }
 #endif
 
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 6cf0478..927be1e 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -334,6 +334,7 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
  */
 static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 {
+	int ret;
 	dev_dbg(hsotg->dev, "++Resume or Remote Wakeup Detected Interrupt++\n");
 	dev_dbg(hsotg->dev, "%s lxstate = %d\n", __func__, hsotg->lx_state);
 
@@ -345,6 +346,11 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 			/* Clear Remote Wakeup Signaling */
 			dctl &= ~DCTL_RMTWKUPSIG;
 			writel(dctl, hsotg->regs + DCTL);
+			ret = dwc2_exit_hibernation(hsotg, true);
+			if (ret && (ret != -ENOTSUPP))
+				dev_err(hsotg->dev, "exit hibernation failed\n");
+
+			call_gadget(hsotg, resume);
 		}
 		/* Change to L0 state */
 		hsotg->lx_state = DWC2_L0;
@@ -397,6 +403,7 @@ static void dwc2_handle_disconnect_intr(struct dwc2_hsotg *hsotg)
 static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 {
 	u32 dsts;
+	int ret;
 
 	dev_dbg(hsotg->dev, "USB SUSPEND\n");
 
@@ -411,10 +418,43 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 			"DSTS.Suspend Status=%d HWCFG4.Power Optimize=%d\n",
 			!!(dsts & DSTS_SUSPSTS),
 			hsotg->hw_params.power_optimized);
+		if ((dsts & DSTS_SUSPSTS) && hsotg->hw_params.power_optimized) {
+			/* Ignore suspend request before enumeration */
+			if (!dwc2_is_device_connected(hsotg)) {
+				dev_dbg(hsotg->dev,
+						"ignore suspend request before enumeration\n");
+				goto clear_int;
+			}
+
+			ret = dwc2_enter_hibernation(hsotg);
+			if (ret) {
+				if (ret != -ENOTSUPP)
+					dev_err(hsotg->dev,
+							"enter hibernation failed\n");
+				goto skip_power_saving;
+			}
+
+			udelay(100);
+
+			/* Ask phy to be suspended */
+			if (!IS_ERR_OR_NULL(hsotg->uphy))
+				usb_phy_set_suspend(hsotg->uphy, true);
+skip_power_saving:
+			/*
+			 * Change to L2 (suspend) state before releasing
+			 * spinlock
+			 */
+			hsotg->lx_state = DWC2_L2;
+
+			/* Call gadget suspend callback */
+			call_gadget(hsotg, suspend);
+		}
 	} else {
 		if (hsotg->op_state == OTG_STATE_A_PERIPHERAL) {
 			dev_dbg(hsotg->dev, "a_peripheral->a_host\n");
 
+			/* Change to L2 (suspend) state */
+			hsotg->lx_state = DWC2_L2;
 			/* Clear the a_peripheral flag, back to a_host */
 			spin_unlock(&hsotg->lock);
 			dwc2_hcd_start(hsotg);
@@ -423,9 +463,7 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 		}
 	}
 
-	/* Change to L2 (suspend) state */
-	hsotg->lx_state = DWC2_L2;
-
+clear_int:
 	/* Clear interrupt */
 	writel(GINTSTS_USBSUSP, hsotg->regs + GINTSTS);
 }
@@ -522,4 +560,3 @@ out:
 	spin_unlock(&hsotg->lock);
 	return retval;
 }
-EXPORT_SYMBOL_GPL(dwc2_handle_common_intr);
diff --git a/drivers/usb/dwc2/debug.h b/drivers/usb/dwc2/debug.h
new file mode 100644
index 0000000..12dbd1d
--- /dev/null
+++ b/drivers/usb/dwc2/debug.h
@@ -0,0 +1,27 @@
+/**
+ * debug.h - Designware USB2 DRD controller debug header
+ *
+ * Copyright (C) 2015 Intel Corporation
+ * Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include "core.h"
+
+#ifdef CONFIG_DEBUG_FS
+extern int dwc2_debugfs_init(struct dwc2_hsotg *);
+extern void dwc2_debugfs_exit(struct dwc2_hsotg *);
+#else
+static inline int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
+{  return 0;  }
+static inline void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg)
+{  }
+#endif
diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c
new file mode 100644
index 0000000..ef2ee3d
--- /dev/null
+++ b/drivers/usb/dwc2/debugfs.c
@@ -0,0 +1,771 @@
+/**
+ * debugfs.c - Designware USB2 DRD controller debugfs
+ *
+ * Copyright (C) 2015 Intel Corporation
+ * Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+#include "core.h"
+#include "debug.h"
+
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+/**
+ * testmode_write - debugfs: change usb test mode
+ * @seq: The seq file to write to.
+ * @v: Unused parameter.
+ *
+ * This debugfs entry modify the current usb test mode.
+ */
+static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t
+		count, loff_t *ppos)
+{
+	struct seq_file		*s = file->private_data;
+	struct dwc2_hsotg	*hsotg = s->private;
+	unsigned long		flags;
+	u32			testmode = 0;
+	char			buf[32];
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (!strncmp(buf, "test_j", 6))
+		testmode = TEST_J;
+	else if (!strncmp(buf, "test_k", 6))
+		testmode = TEST_K;
+	else if (!strncmp(buf, "test_se0_nak", 12))
+		testmode = TEST_SE0_NAK;
+	else if (!strncmp(buf, "test_packet", 11))
+		testmode = TEST_PACKET;
+	else if (!strncmp(buf, "test_force_enable", 17))
+		testmode = TEST_FORCE_EN;
+	else
+		testmode = 0;
+
+	spin_lock_irqsave(&hsotg->lock, flags);
+	s3c_hsotg_set_test_mode(hsotg, testmode);
+	spin_unlock_irqrestore(&hsotg->lock, flags);
+	return count;
+}
+
+/**
+ * testmode_show - debugfs: show usb test mode state
+ * @seq: The seq file to write to.
+ * @v: Unused parameter.
+ *
+ * This debugfs entry shows which usb test mode is currently enabled.
+ */
+static int testmode_show(struct seq_file *s, void *unused)
+{
+	struct dwc2_hsotg *hsotg = s->private;
+	unsigned long flags;
+	int dctl;
+
+	spin_lock_irqsave(&hsotg->lock, flags);
+	dctl = readl(hsotg->regs + DCTL);
+	dctl &= DCTL_TSTCTL_MASK;
+	dctl >>= DCTL_TSTCTL_SHIFT;
+	spin_unlock_irqrestore(&hsotg->lock, flags);
+
+	switch (dctl) {
+	case 0:
+		seq_puts(s, "no test\n");
+		break;
+	case TEST_J:
+		seq_puts(s, "test_j\n");
+		break;
+	case TEST_K:
+		seq_puts(s, "test_k\n");
+		break;
+	case TEST_SE0_NAK:
+		seq_puts(s, "test_se0_nak\n");
+		break;
+	case TEST_PACKET:
+		seq_puts(s, "test_packet\n");
+		break;
+	case TEST_FORCE_EN:
+		seq_puts(s, "test_force_enable\n");
+		break;
+	default:
+		seq_printf(s, "UNKNOWN %d\n", dctl);
+	}
+
+	return 0;
+}
+
+static int testmode_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, testmode_show, inode->i_private);
+}
+
+static const struct file_operations testmode_fops = {
+	.owner		= THIS_MODULE,
+	.open		= testmode_open,
+	.write		= testmode_write,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/**
+ * state_show - debugfs: show overall driver and device state.
+ * @seq: The seq file to write to.
+ * @v: Unused parameter.
+ *
+ * This debugfs entry shows the overall state of the hardware and
+ * some general information about each of the endpoints available
+ * to the system.
+ */
+static int state_show(struct seq_file *seq, void *v)
+{
+	struct dwc2_hsotg *hsotg = seq->private;
+	void __iomem *regs = hsotg->regs;
+	int idx;
+
+	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
+		 readl(regs + DCFG),
+		 readl(regs + DCTL),
+		 readl(regs + DSTS));
+
+	seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
+		   readl(regs + DIEPMSK), readl(regs + DOEPMSK));
+
+	seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
+		   readl(regs + GINTMSK),
+		   readl(regs + GINTSTS));
+
+	seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
+		   readl(regs + DAINTMSK),
+		   readl(regs + DAINT));
+
+	seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
+		   readl(regs + GNPTXSTS),
+		   readl(regs + GRXSTSR));
+
+	seq_puts(seq, "\nEndpoint status:\n");
+
+	for (idx = 0; idx < hsotg->num_of_eps; idx++) {
+		u32 in, out;
+
+		in = readl(regs + DIEPCTL(idx));
+		out = readl(regs + DOEPCTL(idx));
+
+		seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
+			   idx, in, out);
+
+		in = readl(regs + DIEPTSIZ(idx));
+		out = readl(regs + DOEPTSIZ(idx));
+
+		seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
+			   in, out);
+
+		seq_puts(seq, "\n");
+	}
+
+	return 0;
+}
+
+static int state_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, state_show, inode->i_private);
+}
+
+static const struct file_operations state_fops = {
+	.owner		= THIS_MODULE,
+	.open		= state_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/**
+ * fifo_show - debugfs: show the fifo information
+ * @seq: The seq_file to write data to.
+ * @v: Unused parameter.
+ *
+ * Show the FIFO information for the overall fifo and all the
+ * periodic transmission FIFOs.
+ */
+static int fifo_show(struct seq_file *seq, void *v)
+{
+	struct dwc2_hsotg *hsotg = seq->private;
+	void __iomem *regs = hsotg->regs;
+	u32 val;
+	int idx;
+
+	seq_puts(seq, "Non-periodic FIFOs:\n");
+	seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + GRXFSIZ));
+
+	val = readl(regs + GNPTXFSIZ);
+	seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
+		   val >> FIFOSIZE_DEPTH_SHIFT,
+		   val & FIFOSIZE_DEPTH_MASK);
+
+	seq_puts(seq, "\nPeriodic TXFIFOs:\n");
+
+	for (idx = 1; idx < hsotg->num_of_eps; idx++) {
+		val = readl(regs + DPTXFSIZN(idx));
+
+		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
+			   val >> FIFOSIZE_DEPTH_SHIFT,
+			   val & FIFOSIZE_STARTADDR_MASK);
+	}
+
+	return 0;
+}
+
+static int fifo_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fifo_show, inode->i_private);
+}
+
+static const struct file_operations fifo_fops = {
+	.owner		= THIS_MODULE,
+	.open		= fifo_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static const char *decode_direction(int is_in)
+{
+	return is_in ? "in" : "out";
+}
+
+/**
+ * ep_show - debugfs: show the state of an endpoint.
+ * @seq: The seq_file to write data to.
+ * @v: Unused parameter.
+ *
+ * This debugfs entry shows the state of the given endpoint (one is
+ * registered for each available).
+ */
+static int ep_show(struct seq_file *seq, void *v)
+{
+	struct s3c_hsotg_ep *ep = seq->private;
+	struct dwc2_hsotg *hsotg = ep->parent;
+	struct s3c_hsotg_req *req;
+	void __iomem *regs = hsotg->regs;
+	int index = ep->index;
+	int show_limit = 15;
+	unsigned long flags;
+
+	seq_printf(seq, "Endpoint index %d, named %s,  dir %s:\n",
+		   ep->index, ep->ep.name, decode_direction(ep->dir_in));
+
+	/* first show the register state */
+
+	seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
+		   readl(regs + DIEPCTL(index)),
+		   readl(regs + DOEPCTL(index)));
+
+	seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
+		   readl(regs + DIEPDMA(index)),
+		   readl(regs + DOEPDMA(index)));
+
+	seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
+		   readl(regs + DIEPINT(index)),
+		   readl(regs + DOEPINT(index)));
+
+	seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
+		   readl(regs + DIEPTSIZ(index)),
+		   readl(regs + DOEPTSIZ(index)));
+
+	seq_puts(seq, "\n");
+	seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
+	seq_printf(seq, "total_data=%ld\n", ep->total_data);
+
+	seq_printf(seq, "request list (%p,%p):\n",
+		   ep->queue.next, ep->queue.prev);
+
+	spin_lock_irqsave(&hsotg->lock, flags);
+
+	list_for_each_entry(req, &ep->queue, queue) {
+		if (--show_limit < 0) {
+			seq_puts(seq, "not showing more requests...\n");
+			break;
+		}
+
+		seq_printf(seq, "%c req %p: %d bytes @%p, ",
+			   req == ep->req ? '*' : ' ',
+			   req, req->req.length, req->req.buf);
+		seq_printf(seq, "%d done, res %d\n",
+			   req->req.actual, req->req.status);
+	}
+
+	spin_unlock_irqrestore(&hsotg->lock, flags);
+
+	return 0;
+}
+
+static int ep_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ep_show, inode->i_private);
+}
+
+static const struct file_operations ep_fops = {
+	.owner		= THIS_MODULE,
+	.open		= ep_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/**
+ * s3c_hsotg_create_debug - create debugfs directory and files
+ * @hsotg: The driver state
+ *
+ * Create the debugfs files to allow the user to get information
+ * about the state of the system. The directory name is created
+ * with the same name as the device itself, in case we end up
+ * with multiple blocks in future systems.
+ */
+static void s3c_hsotg_create_debug(struct dwc2_hsotg *hsotg)
+{
+	struct dentry *root;
+	struct dentry *file;
+	unsigned epidx;
+
+	root = hsotg->debug_root;
+
+	/* create general state file */
+
+	file = debugfs_create_file("state", S_IRUGO, root, hsotg, &state_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
+
+	file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, hsotg,
+							&testmode_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create testmode\n",
+				__func__);
+
+	file = debugfs_create_file("fifo", S_IRUGO, root, hsotg, &fifo_fops);
+	if (IS_ERR(file))
+		dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
+
+	/* Create one file for each out endpoint */
+	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
+		struct s3c_hsotg_ep *ep;
+
+		ep = hsotg->eps_out[epidx];
+		if (ep) {
+			file = debugfs_create_file(ep->name, S_IRUGO,
+							  root, ep, &ep_fops);
+			if (IS_ERR(file))
+				dev_err(hsotg->dev, "failed to create %s debug file\n",
+					ep->name);
+		}
+	}
+	/* Create one file for each in endpoint. EP0 is handled with out eps */
+	for (epidx = 1; epidx < hsotg->num_of_eps; epidx++) {
+		struct s3c_hsotg_ep *ep;
+
+		ep = hsotg->eps_in[epidx];
+		if (ep) {
+			file = debugfs_create_file(ep->name, S_IRUGO,
+							  root, ep, &ep_fops);
+			if (IS_ERR(file))
+				dev_err(hsotg->dev, "failed to create %s debug file\n",
+					ep->name);
+		}
+	}
+}
+#else
+static inline void s3c_hsotg_create_debug(struct dwc2_hsotg *hsotg) {}
+#endif
+
+/* s3c_hsotg_delete_debug is removed as cleanup in done in dwc2_debugfs_exit */
+
+#define dump_register(nm)	\
+{				\
+	.name	= #nm,		\
+	.offset	= nm,		\
+}
+
+static const struct debugfs_reg32 dwc2_regs[] = {
+	/*
+	 * Accessing registers like this can trigger mode mismatch interrupt.
+	 * However, according to dwc2 databook, the register access, in this
+	 * case, is completed on the processor bus but is ignored by the core
+	 * and does not affect its operation.
+	 */
+	dump_register(GOTGCTL),
+	dump_register(GOTGINT),
+	dump_register(GAHBCFG),
+	dump_register(GUSBCFG),
+	dump_register(GRSTCTL),
+	dump_register(GINTSTS),
+	dump_register(GINTMSK),
+	dump_register(GRXSTSR),
+	dump_register(GRXSTSP),
+	dump_register(GRXFSIZ),
+	dump_register(GNPTXFSIZ),
+	dump_register(GNPTXSTS),
+	dump_register(GI2CCTL),
+	dump_register(GPVNDCTL),
+	dump_register(GGPIO),
+	dump_register(GUID),
+	dump_register(GSNPSID),
+	dump_register(GHWCFG1),
+	dump_register(GHWCFG2),
+	dump_register(GHWCFG3),
+	dump_register(GHWCFG4),
+	dump_register(GLPMCFG),
+	dump_register(GPWRDN),
+	dump_register(GDFIFOCFG),
+	dump_register(ADPCTL),
+	dump_register(HPTXFSIZ),
+	dump_register(DPTXFSIZN(1)),
+	dump_register(DPTXFSIZN(2)),
+	dump_register(DPTXFSIZN(3)),
+	dump_register(DPTXFSIZN(4)),
+	dump_register(DPTXFSIZN(5)),
+	dump_register(DPTXFSIZN(6)),
+	dump_register(DPTXFSIZN(7)),
+	dump_register(DPTXFSIZN(8)),
+	dump_register(DPTXFSIZN(9)),
+	dump_register(DPTXFSIZN(10)),
+	dump_register(DPTXFSIZN(11)),
+	dump_register(DPTXFSIZN(12)),
+	dump_register(DPTXFSIZN(13)),
+	dump_register(DPTXFSIZN(14)),
+	dump_register(DPTXFSIZN(15)),
+	dump_register(DCFG),
+	dump_register(DCTL),
+	dump_register(DSTS),
+	dump_register(DIEPMSK),
+	dump_register(DOEPMSK),
+	dump_register(DAINT),
+	dump_register(DAINTMSK),
+	dump_register(DTKNQR1),
+	dump_register(DTKNQR2),
+	dump_register(DTKNQR3),
+	dump_register(DTKNQR4),
+	dump_register(DVBUSDIS),
+	dump_register(DVBUSPULSE),
+	dump_register(DIEPCTL(0)),
+	dump_register(DIEPCTL(1)),
+	dump_register(DIEPCTL(2)),
+	dump_register(DIEPCTL(3)),
+	dump_register(DIEPCTL(4)),
+	dump_register(DIEPCTL(5)),
+	dump_register(DIEPCTL(6)),
+	dump_register(DIEPCTL(7)),
+	dump_register(DIEPCTL(8)),
+	dump_register(DIEPCTL(9)),
+	dump_register(DIEPCTL(10)),
+	dump_register(DIEPCTL(11)),
+	dump_register(DIEPCTL(12)),
+	dump_register(DIEPCTL(13)),
+	dump_register(DIEPCTL(14)),
+	dump_register(DIEPCTL(15)),
+	dump_register(DOEPCTL(0)),
+	dump_register(DOEPCTL(1)),
+	dump_register(DOEPCTL(2)),
+	dump_register(DOEPCTL(3)),
+	dump_register(DOEPCTL(4)),
+	dump_register(DOEPCTL(5)),
+	dump_register(DOEPCTL(6)),
+	dump_register(DOEPCTL(7)),
+	dump_register(DOEPCTL(8)),
+	dump_register(DOEPCTL(9)),
+	dump_register(DOEPCTL(10)),
+	dump_register(DOEPCTL(11)),
+	dump_register(DOEPCTL(12)),
+	dump_register(DOEPCTL(13)),
+	dump_register(DOEPCTL(14)),
+	dump_register(DOEPCTL(15)),
+	dump_register(DIEPINT(0)),
+	dump_register(DIEPINT(1)),
+	dump_register(DIEPINT(2)),
+	dump_register(DIEPINT(3)),
+	dump_register(DIEPINT(4)),
+	dump_register(DIEPINT(5)),
+	dump_register(DIEPINT(6)),
+	dump_register(DIEPINT(7)),
+	dump_register(DIEPINT(8)),
+	dump_register(DIEPINT(9)),
+	dump_register(DIEPINT(10)),
+	dump_register(DIEPINT(11)),
+	dump_register(DIEPINT(12)),
+	dump_register(DIEPINT(13)),
+	dump_register(DIEPINT(14)),
+	dump_register(DIEPINT(15)),
+	dump_register(DOEPINT(0)),
+	dump_register(DOEPINT(1)),
+	dump_register(DOEPINT(2)),
+	dump_register(DOEPINT(3)),
+	dump_register(DOEPINT(4)),
+	dump_register(DOEPINT(5)),
+	dump_register(DOEPINT(6)),
+	dump_register(DOEPINT(7)),
+	dump_register(DOEPINT(8)),
+	dump_register(DOEPINT(9)),
+	dump_register(DOEPINT(10)),
+	dump_register(DOEPINT(11)),
+	dump_register(DOEPINT(12)),
+	dump_register(DOEPINT(13)),
+	dump_register(DOEPINT(14)),
+	dump_register(DOEPINT(15)),
+	dump_register(DIEPTSIZ(0)),
+	dump_register(DIEPTSIZ(1)),
+	dump_register(DIEPTSIZ(2)),
+	dump_register(DIEPTSIZ(3)),
+	dump_register(DIEPTSIZ(4)),
+	dump_register(DIEPTSIZ(5)),
+	dump_register(DIEPTSIZ(6)),
+	dump_register(DIEPTSIZ(7)),
+	dump_register(DIEPTSIZ(8)),
+	dump_register(DIEPTSIZ(9)),
+	dump_register(DIEPTSIZ(10)),
+	dump_register(DIEPTSIZ(11)),
+	dump_register(DIEPTSIZ(12)),
+	dump_register(DIEPTSIZ(13)),
+	dump_register(DIEPTSIZ(14)),
+	dump_register(DIEPTSIZ(15)),
+	dump_register(DOEPTSIZ(0)),
+	dump_register(DOEPTSIZ(1)),
+	dump_register(DOEPTSIZ(2)),
+	dump_register(DOEPTSIZ(3)),
+	dump_register(DOEPTSIZ(4)),
+	dump_register(DOEPTSIZ(5)),
+	dump_register(DOEPTSIZ(6)),
+	dump_register(DOEPTSIZ(7)),
+	dump_register(DOEPTSIZ(8)),
+	dump_register(DOEPTSIZ(9)),
+	dump_register(DOEPTSIZ(10)),
+	dump_register(DOEPTSIZ(11)),
+	dump_register(DOEPTSIZ(12)),
+	dump_register(DOEPTSIZ(13)),
+	dump_register(DOEPTSIZ(14)),
+	dump_register(DOEPTSIZ(15)),
+	dump_register(DIEPDMA(0)),
+	dump_register(DIEPDMA(1)),
+	dump_register(DIEPDMA(2)),
+	dump_register(DIEPDMA(3)),
+	dump_register(DIEPDMA(4)),
+	dump_register(DIEPDMA(5)),
+	dump_register(DIEPDMA(6)),
+	dump_register(DIEPDMA(7)),
+	dump_register(DIEPDMA(8)),
+	dump_register(DIEPDMA(9)),
+	dump_register(DIEPDMA(10)),
+	dump_register(DIEPDMA(11)),
+	dump_register(DIEPDMA(12)),
+	dump_register(DIEPDMA(13)),
+	dump_register(DIEPDMA(14)),
+	dump_register(DIEPDMA(15)),
+	dump_register(DOEPDMA(0)),
+	dump_register(DOEPDMA(1)),
+	dump_register(DOEPDMA(2)),
+	dump_register(DOEPDMA(3)),
+	dump_register(DOEPDMA(4)),
+	dump_register(DOEPDMA(5)),
+	dump_register(DOEPDMA(6)),
+	dump_register(DOEPDMA(7)),
+	dump_register(DOEPDMA(8)),
+	dump_register(DOEPDMA(9)),
+	dump_register(DOEPDMA(10)),
+	dump_register(DOEPDMA(11)),
+	dump_register(DOEPDMA(12)),
+	dump_register(DOEPDMA(13)),
+	dump_register(DOEPDMA(14)),
+	dump_register(DOEPDMA(15)),
+	dump_register(DTXFSTS(0)),
+	dump_register(DTXFSTS(1)),
+	dump_register(DTXFSTS(2)),
+	dump_register(DTXFSTS(3)),
+	dump_register(DTXFSTS(4)),
+	dump_register(DTXFSTS(5)),
+	dump_register(DTXFSTS(6)),
+	dump_register(DTXFSTS(7)),
+	dump_register(DTXFSTS(8)),
+	dump_register(DTXFSTS(9)),
+	dump_register(DTXFSTS(10)),
+	dump_register(DTXFSTS(11)),
+	dump_register(DTXFSTS(12)),
+	dump_register(DTXFSTS(13)),
+	dump_register(DTXFSTS(14)),
+	dump_register(DTXFSTS(15)),
+	dump_register(PCGCTL),
+	dump_register(HCFG),
+	dump_register(HFIR),
+	dump_register(HFNUM),
+	dump_register(HPTXSTS),
+	dump_register(HAINT),
+	dump_register(HAINTMSK),
+	dump_register(HFLBADDR),
+	dump_register(HPRT0),
+	dump_register(HCCHAR(0)),
+	dump_register(HCCHAR(1)),
+	dump_register(HCCHAR(2)),
+	dump_register(HCCHAR(3)),
+	dump_register(HCCHAR(4)),
+	dump_register(HCCHAR(5)),
+	dump_register(HCCHAR(6)),
+	dump_register(HCCHAR(7)),
+	dump_register(HCCHAR(8)),
+	dump_register(HCCHAR(9)),
+	dump_register(HCCHAR(10)),
+	dump_register(HCCHAR(11)),
+	dump_register(HCCHAR(12)),
+	dump_register(HCCHAR(13)),
+	dump_register(HCCHAR(14)),
+	dump_register(HCCHAR(15)),
+	dump_register(HCSPLT(0)),
+	dump_register(HCSPLT(1)),
+	dump_register(HCSPLT(2)),
+	dump_register(HCSPLT(3)),
+	dump_register(HCSPLT(4)),
+	dump_register(HCSPLT(5)),
+	dump_register(HCSPLT(6)),
+	dump_register(HCSPLT(7)),
+	dump_register(HCSPLT(8)),
+	dump_register(HCSPLT(9)),
+	dump_register(HCSPLT(10)),
+	dump_register(HCSPLT(11)),
+	dump_register(HCSPLT(12)),
+	dump_register(HCSPLT(13)),
+	dump_register(HCSPLT(14)),
+	dump_register(HCSPLT(15)),
+	dump_register(HCINT(0)),
+	dump_register(HCINT(1)),
+	dump_register(HCINT(2)),
+	dump_register(HCINT(3)),
+	dump_register(HCINT(4)),
+	dump_register(HCINT(5)),
+	dump_register(HCINT(6)),
+	dump_register(HCINT(7)),
+	dump_register(HCINT(8)),
+	dump_register(HCINT(9)),
+	dump_register(HCINT(10)),
+	dump_register(HCINT(11)),
+	dump_register(HCINT(12)),
+	dump_register(HCINT(13)),
+	dump_register(HCINT(14)),
+	dump_register(HCINT(15)),
+	dump_register(HCINTMSK(0)),
+	dump_register(HCINTMSK(1)),
+	dump_register(HCINTMSK(2)),
+	dump_register(HCINTMSK(3)),
+	dump_register(HCINTMSK(4)),
+	dump_register(HCINTMSK(5)),
+	dump_register(HCINTMSK(6)),
+	dump_register(HCINTMSK(7)),
+	dump_register(HCINTMSK(8)),
+	dump_register(HCINTMSK(9)),
+	dump_register(HCINTMSK(10)),
+	dump_register(HCINTMSK(11)),
+	dump_register(HCINTMSK(12)),
+	dump_register(HCINTMSK(13)),
+	dump_register(HCINTMSK(14)),
+	dump_register(HCINTMSK(15)),
+	dump_register(HCTSIZ(0)),
+	dump_register(HCTSIZ(1)),
+	dump_register(HCTSIZ(2)),
+	dump_register(HCTSIZ(3)),
+	dump_register(HCTSIZ(4)),
+	dump_register(HCTSIZ(5)),
+	dump_register(HCTSIZ(6)),
+	dump_register(HCTSIZ(7)),
+	dump_register(HCTSIZ(8)),
+	dump_register(HCTSIZ(9)),
+	dump_register(HCTSIZ(10)),
+	dump_register(HCTSIZ(11)),
+	dump_register(HCTSIZ(12)),
+	dump_register(HCTSIZ(13)),
+	dump_register(HCTSIZ(14)),
+	dump_register(HCTSIZ(15)),
+	dump_register(HCDMA(0)),
+	dump_register(HCDMA(1)),
+	dump_register(HCDMA(2)),
+	dump_register(HCDMA(3)),
+	dump_register(HCDMA(4)),
+	dump_register(HCDMA(5)),
+	dump_register(HCDMA(6)),
+	dump_register(HCDMA(7)),
+	dump_register(HCDMA(8)),
+	dump_register(HCDMA(9)),
+	dump_register(HCDMA(10)),
+	dump_register(HCDMA(11)),
+	dump_register(HCDMA(12)),
+	dump_register(HCDMA(13)),
+	dump_register(HCDMA(14)),
+	dump_register(HCDMA(15)),
+	dump_register(HCDMAB(0)),
+	dump_register(HCDMAB(1)),
+	dump_register(HCDMAB(2)),
+	dump_register(HCDMAB(3)),
+	dump_register(HCDMAB(4)),
+	dump_register(HCDMAB(5)),
+	dump_register(HCDMAB(6)),
+	dump_register(HCDMAB(7)),
+	dump_register(HCDMAB(8)),
+	dump_register(HCDMAB(9)),
+	dump_register(HCDMAB(10)),
+	dump_register(HCDMAB(11)),
+	dump_register(HCDMAB(12)),
+	dump_register(HCDMAB(13)),
+	dump_register(HCDMAB(14)),
+	dump_register(HCDMAB(15)),
+};
+
+int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
+{
+	int			ret;
+	struct dentry		*file;
+
+	hsotg->debug_root = debugfs_create_dir(dev_name(hsotg->dev), NULL);
+	if (!hsotg->debug_root) {
+		ret = -ENOMEM;
+		goto err0;
+	}
+
+	/* Add gadget debugfs nodes */
+	s3c_hsotg_create_debug(hsotg);
+
+	hsotg->regset = devm_kzalloc(hsotg->dev, sizeof(*hsotg->regset),
+								GFP_KERNEL);
+	if (!hsotg->regset) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
+	hsotg->regset->regs = dwc2_regs;
+	hsotg->regset->nregs = ARRAY_SIZE(dwc2_regs);
+	hsotg->regset->base = hsotg->regs;
+
+	file = debugfs_create_regset32("regdump", S_IRUGO, hsotg->debug_root,
+								hsotg->regset);
+	if (!file) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
+	return 0;
+err1:
+	debugfs_remove_recursive(hsotg->debug_root);
+err0:
+	return ret;
+}
+
+void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg)
+{
+	debugfs_remove_recursive(hsotg->debug_root);
+	hsotg->debug_root = NULL;
+}
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 6a30887..4d47b7c 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -20,7 +20,6 @@
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
-#include <linux/debugfs.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
 #include <linux/delay.h>
@@ -35,7 +34,6 @@
 #include <linux/usb/gadget.h>
 #include <linux/usb/phy.h>
 #include <linux/platform_data/s3c-hsotg.h>
-#include <linux/uaccess.h>
 
 #include "core.h"
 #include "hw.h"
@@ -792,6 +790,13 @@ static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 		ep->name, req, req->length, req->buf, req->no_interrupt,
 		req->zero, req->short_not_ok);
 
+	/* Prevent new request submission when controller is suspended */
+	if (hs->lx_state == DWC2_L2) {
+		dev_dbg(hs->dev, "%s: don't submit request while suspended\n",
+				__func__);
+		return -EAGAIN;
+	}
+
 	/* initialise status of the request */
 	INIT_LIST_HEAD(&hs_req->queue);
 	req->actual = 0;
@@ -894,7 +899,7 @@ static struct s3c_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
  * @testmode: requested usb test mode
  * Enable usb Test Mode requested by the Host.
  */
-static int s3c_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode)
+int s3c_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode)
 {
 	int dctl = readl(hsotg->regs + DCTL);
 
@@ -2185,7 +2190,6 @@ void s3c_hsotg_disconnect(struct dwc2_hsotg *hsotg)
 
 	call_gadget(hsotg, disconnect);
 }
-EXPORT_SYMBOL_GPL(s3c_hsotg_disconnect);
 
 /**
  * s3c_hsotg_irq_fifoempty - TX FIFO empty interrupt handler
@@ -2310,8 +2314,9 @@ void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 	writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT |
 		GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF |
 		GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST |
-		GINTSTS_ENUMDONE | GINTSTS_OTGINT |
-		GINTSTS_USBSUSP | GINTSTS_WKUPINT,
+		GINTSTS_RESETDET | GINTSTS_ENUMDONE |
+		GINTSTS_OTGINT | GINTSTS_USBSUSP |
+		GINTSTS_WKUPINT,
 		hsotg->regs + GINTMSK);
 
 	if (using_dma(hsotg))
@@ -2477,7 +2482,19 @@ irq_retry:
 		}
 	}
 
-	if (gintsts & GINTSTS_USBRST) {
+	if (gintsts & GINTSTS_RESETDET) {
+		dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__);
+
+		writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS);
+
+		/* This event must be used only if controller is suspended */
+		if (hsotg->lx_state == DWC2_L2) {
+			dwc2_exit_hibernation(hsotg, true);
+			hsotg->lx_state = DWC2_L0;
+		}
+	}
+
+	if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) {
 
 		u32 usb_status = readl(hsotg->regs + GOTGCTL);
 
@@ -2497,6 +2514,7 @@ irq_retry:
 				kill_all_requests(hsotg, hsotg->eps_out[0],
 							  -ECONNRESET);
 
+				hsotg->lx_state = DWC2_L0;
 				s3c_hsotg_core_init_disconnected(hsotg, true);
 			}
 		}
@@ -2745,7 +2763,7 @@ error:
  * s3c_hsotg_ep_disable - disable given endpoint
  * @ep: The endpoint to disable.
  */
-static int s3c_hsotg_ep_disable_force(struct usb_ep *ep, bool force)
+static int s3c_hsotg_ep_disable(struct usb_ep *ep)
 {
 	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
 	struct dwc2_hsotg *hsotg = hs_ep->parent;
@@ -2788,10 +2806,6 @@ static int s3c_hsotg_ep_disable_force(struct usb_ep *ep, bool force)
 	return 0;
 }
 
-static int s3c_hsotg_ep_disable(struct usb_ep *ep)
-{
-	return s3c_hsotg_ep_disable_force(ep, false);
-}
 /**
  * on_list - check request is on the given endpoint
  * @ep: The endpoint to check.
@@ -3187,6 +3201,14 @@ static int s3c_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
 	spin_lock_irqsave(&hsotg->lock, flags);
 
 	if (is_active) {
+		/*
+		 * If controller is hibernated, it must exit from hibernation
+		 * before being initialized
+		 */
+		if (hsotg->lx_state == DWC2_L2) {
+			dwc2_exit_hibernation(hsotg, false);
+			hsotg->lx_state = DWC2_L0;
+		}
 		/* Kill any ep0 requests as controller will be reinitialized */
 		kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
 		s3c_hsotg_core_init_disconnected(hsotg, false);
@@ -3391,404 +3413,6 @@ static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg)
 #endif
 }
 
-/**
- * testmode_write - debugfs: change usb test mode
- * @seq: The seq file to write to.
- * @v: Unused parameter.
- *
- * This debugfs entry modify the current usb test mode.
- */
-static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t
-		count, loff_t *ppos)
-{
-	struct seq_file		*s = file->private_data;
-	struct dwc2_hsotg	*hsotg = s->private;
-	unsigned long		flags;
-	u32			testmode = 0;
-	char			buf[32];
-
-	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
-		return -EFAULT;
-
-	if (!strncmp(buf, "test_j", 6))
-		testmode = TEST_J;
-	else if (!strncmp(buf, "test_k", 6))
-		testmode = TEST_K;
-	else if (!strncmp(buf, "test_se0_nak", 12))
-		testmode = TEST_SE0_NAK;
-	else if (!strncmp(buf, "test_packet", 11))
-		testmode = TEST_PACKET;
-	else if (!strncmp(buf, "test_force_enable", 17))
-		testmode = TEST_FORCE_EN;
-	else
-		testmode = 0;
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	s3c_hsotg_set_test_mode(hsotg, testmode);
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-	return count;
-}
-
-/**
- * testmode_show - debugfs: show usb test mode state
- * @seq: The seq file to write to.
- * @v: Unused parameter.
- *
- * This debugfs entry shows which usb test mode is currently enabled.
- */
-static int testmode_show(struct seq_file *s, void *unused)
-{
-	struct dwc2_hsotg *hsotg = s->private;
-	unsigned long flags;
-	int dctl;
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	dctl = readl(hsotg->regs + DCTL);
-	dctl &= DCTL_TSTCTL_MASK;
-	dctl >>= DCTL_TSTCTL_SHIFT;
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	switch (dctl) {
-	case 0:
-		seq_puts(s, "no test\n");
-		break;
-	case TEST_J:
-		seq_puts(s, "test_j\n");
-		break;
-	case TEST_K:
-		seq_puts(s, "test_k\n");
-		break;
-	case TEST_SE0_NAK:
-		seq_puts(s, "test_se0_nak\n");
-		break;
-	case TEST_PACKET:
-		seq_puts(s, "test_packet\n");
-		break;
-	case TEST_FORCE_EN:
-		seq_puts(s, "test_force_enable\n");
-		break;
-	default:
-		seq_printf(s, "UNKNOWN %d\n", dctl);
-	}
-
-	return 0;
-}
-
-static int testmode_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, testmode_show, inode->i_private);
-}
-
-static const struct file_operations testmode_fops = {
-	.owner		= THIS_MODULE,
-	.open		= testmode_open,
-	.write		= testmode_write,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/**
- * state_show - debugfs: show overall driver and device state.
- * @seq: The seq file to write to.
- * @v: Unused parameter.
- *
- * This debugfs entry shows the overall state of the hardware and
- * some general information about each of the endpoints available
- * to the system.
- */
-static int state_show(struct seq_file *seq, void *v)
-{
-	struct dwc2_hsotg *hsotg = seq->private;
-	void __iomem *regs = hsotg->regs;
-	int idx;
-
-	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
-		 readl(regs + DCFG),
-		 readl(regs + DCTL),
-		 readl(regs + DSTS));
-
-	seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
-		   readl(regs + DIEPMSK), readl(regs + DOEPMSK));
-
-	seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
-		   readl(regs + GINTMSK),
-		   readl(regs + GINTSTS));
-
-	seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
-		   readl(regs + DAINTMSK),
-		   readl(regs + DAINT));
-
-	seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
-		   readl(regs + GNPTXSTS),
-		   readl(regs + GRXSTSR));
-
-	seq_puts(seq, "\nEndpoint status:\n");
-
-	for (idx = 0; idx < hsotg->num_of_eps; idx++) {
-		u32 in, out;
-
-		in = readl(regs + DIEPCTL(idx));
-		out = readl(regs + DOEPCTL(idx));
-
-		seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
-			   idx, in, out);
-
-		in = readl(regs + DIEPTSIZ(idx));
-		out = readl(regs + DOEPTSIZ(idx));
-
-		seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
-			   in, out);
-
-		seq_puts(seq, "\n");
-	}
-
-	return 0;
-}
-
-static int state_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, state_show, inode->i_private);
-}
-
-static const struct file_operations state_fops = {
-	.owner		= THIS_MODULE,
-	.open		= state_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/**
- * fifo_show - debugfs: show the fifo information
- * @seq: The seq_file to write data to.
- * @v: Unused parameter.
- *
- * Show the FIFO information for the overall fifo and all the
- * periodic transmission FIFOs.
- */
-static int fifo_show(struct seq_file *seq, void *v)
-{
-	struct dwc2_hsotg *hsotg = seq->private;
-	void __iomem *regs = hsotg->regs;
-	u32 val;
-	int idx;
-
-	seq_puts(seq, "Non-periodic FIFOs:\n");
-	seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + GRXFSIZ));
-
-	val = readl(regs + GNPTXFSIZ);
-	seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
-		   val >> FIFOSIZE_DEPTH_SHIFT,
-		   val & FIFOSIZE_DEPTH_MASK);
-
-	seq_puts(seq, "\nPeriodic TXFIFOs:\n");
-
-	for (idx = 1; idx < hsotg->num_of_eps; idx++) {
-		val = readl(regs + DPTXFSIZN(idx));
-
-		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
-			   val >> FIFOSIZE_DEPTH_SHIFT,
-			   val & FIFOSIZE_STARTADDR_MASK);
-	}
-
-	return 0;
-}
-
-static int fifo_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, fifo_show, inode->i_private);
-}
-
-static const struct file_operations fifo_fops = {
-	.owner		= THIS_MODULE,
-	.open		= fifo_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-
-static const char *decode_direction(int is_in)
-{
-	return is_in ? "in" : "out";
-}
-
-/**
- * ep_show - debugfs: show the state of an endpoint.
- * @seq: The seq_file to write data to.
- * @v: Unused parameter.
- *
- * This debugfs entry shows the state of the given endpoint (one is
- * registered for each available).
- */
-static int ep_show(struct seq_file *seq, void *v)
-{
-	struct s3c_hsotg_ep *ep = seq->private;
-	struct dwc2_hsotg *hsotg = ep->parent;
-	struct s3c_hsotg_req *req;
-	void __iomem *regs = hsotg->regs;
-	int index = ep->index;
-	int show_limit = 15;
-	unsigned long flags;
-
-	seq_printf(seq, "Endpoint index %d, named %s,  dir %s:\n",
-		   ep->index, ep->ep.name, decode_direction(ep->dir_in));
-
-	/* first show the register state */
-
-	seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
-		   readl(regs + DIEPCTL(index)),
-		   readl(regs + DOEPCTL(index)));
-
-	seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
-		   readl(regs + DIEPDMA(index)),
-		   readl(regs + DOEPDMA(index)));
-
-	seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
-		   readl(regs + DIEPINT(index)),
-		   readl(regs + DOEPINT(index)));
-
-	seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
-		   readl(regs + DIEPTSIZ(index)),
-		   readl(regs + DOEPTSIZ(index)));
-
-	seq_puts(seq, "\n");
-	seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
-	seq_printf(seq, "total_data=%ld\n", ep->total_data);
-
-	seq_printf(seq, "request list (%p,%p):\n",
-		   ep->queue.next, ep->queue.prev);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-
-	list_for_each_entry(req, &ep->queue, queue) {
-		if (--show_limit < 0) {
-			seq_puts(seq, "not showing more requests...\n");
-			break;
-		}
-
-		seq_printf(seq, "%c req %p: %d bytes @%p, ",
-			   req == ep->req ? '*' : ' ',
-			   req, req->req.length, req->req.buf);
-		seq_printf(seq, "%d done, res %d\n",
-			   req->req.actual, req->req.status);
-	}
-
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	return 0;
-}
-
-static int ep_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ep_show, inode->i_private);
-}
-
-static const struct file_operations ep_fops = {
-	.owner		= THIS_MODULE,
-	.open		= ep_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/**
- * s3c_hsotg_create_debug - create debugfs directory and files
- * @hsotg: The driver state
- *
- * Create the debugfs files to allow the user to get information
- * about the state of the system. The directory name is created
- * with the same name as the device itself, in case we end up
- * with multiple blocks in future systems.
- */
-static void s3c_hsotg_create_debug(struct dwc2_hsotg *hsotg)
-{
-	struct dentry *root;
-	unsigned epidx;
-
-	root = debugfs_create_dir(dev_name(hsotg->dev), NULL);
-	hsotg->debug_root = root;
-	if (IS_ERR(root)) {
-		dev_err(hsotg->dev, "cannot create debug root\n");
-		return;
-	}
-
-	/* create general state file */
-
-	hsotg->debug_file = debugfs_create_file("state", S_IRUGO, root,
-						hsotg, &state_fops);
-
-	if (IS_ERR(hsotg->debug_file))
-		dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
-
-	hsotg->debug_testmode = debugfs_create_file("testmode",
-					S_IRUGO | S_IWUSR, root,
-					hsotg, &testmode_fops);
-
-	if (IS_ERR(hsotg->debug_testmode))
-		dev_err(hsotg->dev, "%s: failed to create testmode\n",
-				__func__);
-
-	hsotg->debug_fifo = debugfs_create_file("fifo", S_IRUGO, root,
-						hsotg, &fifo_fops);
-
-	if (IS_ERR(hsotg->debug_fifo))
-		dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
-
-	/* Create one file for each out endpoint */
-	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
-		struct s3c_hsotg_ep *ep;
-
-		ep = hsotg->eps_out[epidx];
-		if (ep) {
-			ep->debugfs = debugfs_create_file(ep->name, S_IRUGO,
-							  root, ep, &ep_fops);
-
-			if (IS_ERR(ep->debugfs))
-				dev_err(hsotg->dev, "failed to create %s debug file\n",
-					ep->name);
-		}
-	}
-	/* Create one file for each in endpoint. EP0 is handled with out eps */
-	for (epidx = 1; epidx < hsotg->num_of_eps; epidx++) {
-		struct s3c_hsotg_ep *ep;
-
-		ep = hsotg->eps_in[epidx];
-		if (ep) {
-			ep->debugfs = debugfs_create_file(ep->name, S_IRUGO,
-							  root, ep, &ep_fops);
-
-			if (IS_ERR(ep->debugfs))
-				dev_err(hsotg->dev, "failed to create %s debug file\n",
-					ep->name);
-		}
-	}
-}
-
-/**
- * s3c_hsotg_delete_debug - cleanup debugfs entries
- * @hsotg: The driver state
- *
- * Cleanup (remove) the debugfs files for use on module exit.
- */
-static void s3c_hsotg_delete_debug(struct dwc2_hsotg *hsotg)
-{
-	unsigned epidx;
-
-	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
-		if (hsotg->eps_in[epidx])
-			debugfs_remove(hsotg->eps_in[epidx]->debugfs);
-		if (hsotg->eps_out[epidx])
-			debugfs_remove(hsotg->eps_out[epidx]->debugfs);
-	}
-
-	debugfs_remove(hsotg->debug_file);
-	debugfs_remove(hsotg->debug_testmode);
-	debugfs_remove(hsotg->debug_fifo);
-	debugfs_remove(hsotg->debug_root);
-}
-
 #ifdef CONFIG_OF
 static void s3c_hsotg_of_probe(struct dwc2_hsotg *hsotg)
 {
@@ -3896,6 +3520,8 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 	hsotg->gadget.max_speed = USB_SPEED_HIGH;
 	hsotg->gadget.ops = &s3c_hsotg_gadget_ops;
 	hsotg->gadget.name = dev_name(dev);
+	if (hsotg->dr_mode == USB_DR_MODE_OTG)
+		hsotg->gadget.is_otg = 1;
 
 	/* reset the system */
 
@@ -4028,8 +3654,6 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 	if (ret)
 		goto err_supplies;
 
-	s3c_hsotg_create_debug(hsotg);
-
 	s3c_hsotg_dump(hsotg);
 
 	return 0;
@@ -4041,7 +3665,6 @@ err_clk:
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(dwc2_gadget_init);
 
 /**
  * s3c_hsotg_remove - remove function for hsotg driver
@@ -4050,18 +3673,19 @@ EXPORT_SYMBOL_GPL(dwc2_gadget_init);
 int s3c_hsotg_remove(struct dwc2_hsotg *hsotg)
 {
 	usb_del_gadget_udc(&hsotg->gadget);
-	s3c_hsotg_delete_debug(hsotg);
 	clk_disable_unprepare(hsotg->clk);
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(s3c_hsotg_remove);
 
 int s3c_hsotg_suspend(struct dwc2_hsotg *hsotg)
 {
 	unsigned long flags;
 	int ret = 0;
 
+	if (hsotg->lx_state != DWC2_L0)
+		return ret;
+
 	mutex_lock(&hsotg->init_mutex);
 
 	if (hsotg->driver) {
@@ -4095,13 +3719,15 @@ int s3c_hsotg_suspend(struct dwc2_hsotg *hsotg)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(s3c_hsotg_suspend);
 
 int s3c_hsotg_resume(struct dwc2_hsotg *hsotg)
 {
 	unsigned long flags;
 	int ret = 0;
 
+	if (hsotg->lx_state == DWC2_L2)
+		return ret;
+
 	mutex_lock(&hsotg->init_mutex);
 
 	if (hsotg->driver) {
@@ -4124,4 +3750,3 @@ int s3c_hsotg_resume(struct dwc2_hsotg *hsotg)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(s3c_hsotg_resume);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index fbbbac2..b10377c 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -357,12 +357,12 @@ void dwc2_hcd_stop(struct dwc2_hsotg *hsotg)
 	writel(0, hsotg->regs + HPRT0);
 }
 
+/* Caller must hold driver lock */
 static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
 				struct dwc2_hcd_urb *urb, void **ep_handle,
 				gfp_t mem_flags)
 {
 	struct dwc2_qtd *qtd;
-	unsigned long flags;
 	u32 intr_mask;
 	int retval;
 	int dev_speed;
@@ -413,11 +413,9 @@ static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
 			 */
 			return 0;
 
-		spin_lock_irqsave(&hsotg->lock, flags);
 		tr_type = dwc2_hcd_select_transactions(hsotg);
 		if (tr_type != DWC2_TRANSACTION_NONE)
 			dwc2_hcd_queue_transactions(hsotg, tr_type);
-		spin_unlock_irqrestore(&hsotg->lock, flags);
 	}
 
 	return 0;
@@ -721,9 +719,7 @@ static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 			/* 3072 = 3 max-size Isoc packets */
 			buf_size = 3072;
 
-		qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size,
-						      &qh->dw_align_buf_dma,
-						      GFP_ATOMIC);
+		qh->dw_align_buf = kmalloc(buf_size, GFP_ATOMIC | GFP_DMA);
 		if (!qh->dw_align_buf)
 			return -ENOMEM;
 		qh->dw_align_buf_size = buf_size;
@@ -748,6 +744,15 @@ static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 		}
 	}
 
+	qh->dw_align_buf_dma = dma_map_single(hsotg->dev,
+			qh->dw_align_buf, qh->dw_align_buf_size,
+			chan->ep_is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+	if (dma_mapping_error(hsotg->dev, qh->dw_align_buf_dma)) {
+		dev_err(hsotg->dev, "can't map align_buf\n");
+		chan->align_buf = 0;
+		return -EINVAL;
+	}
+
 	chan->align_buf = qh->dw_align_buf_dma;
 	return 0;
 }
@@ -1774,6 +1779,15 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			/* Not supported */
 			break;
 
+		case USB_PORT_FEAT_TEST:
+			hprt0 = dwc2_read_hprt0(hsotg);
+			dev_dbg(hsotg->dev,
+				"SetPortFeature - USB_PORT_FEAT_TEST\n");
+			hprt0 &= ~HPRT0_TSTCTL_MASK;
+			hprt0 |= (windex >> 8) << HPRT0_TSTCTL_SHIFT;
+			writel(hprt0, hsotg->regs + HPRT0);
+			break;
+
 		default:
 			retval = -EINVAL;
 			dev_err(hsotg->dev,
@@ -2313,6 +2327,22 @@ static void _dwc2_hcd_stop(struct usb_hcd *hcd)
 	usleep_range(1000, 3000);
 }
 
+static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
+{
+	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+	hsotg->lx_state = DWC2_L2;
+	return 0;
+}
+
+static int _dwc2_hcd_resume(struct usb_hcd *hcd)
+{
+	struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+	hsotg->lx_state = DWC2_L0;
+	return 0;
+}
+
 /* Returns the current frame number */
 static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd)
 {
@@ -2468,7 +2498,7 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 				"%s: unaligned transfer with no transfer_buffer",
 				__func__);
 			retval = -EINVAL;
-			goto fail1;
+			goto fail0;
 		}
 	}
 
@@ -2496,7 +2526,6 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 
 	spin_lock_irqsave(&hsotg->lock, flags);
 	retval = usb_hcd_link_urb_to_ep(hcd, urb);
-	spin_unlock_irqrestore(&hsotg->lock, flags);
 	if (retval)
 		goto fail1;
 
@@ -2505,22 +2534,22 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 		goto fail2;
 
 	if (alloc_bandwidth) {
-		spin_lock_irqsave(&hsotg->lock, flags);
 		dwc2_allocate_bus_bandwidth(hcd,
 				dwc2_hcd_get_ep_bandwidth(hsotg, ep),
 				urb);
-		spin_unlock_irqrestore(&hsotg->lock, flags);
 	}
 
+	spin_unlock_irqrestore(&hsotg->lock, flags);
+
 	return 0;
 
 fail2:
-	spin_lock_irqsave(&hsotg->lock, flags);
 	dwc2_urb->priv = NULL;
 	usb_hcd_unlink_urb_from_ep(hcd, urb);
-	spin_unlock_irqrestore(&hsotg->lock, flags);
 fail1:
+	spin_unlock_irqrestore(&hsotg->lock, flags);
 	urb->hcpriv = NULL;
+fail0:
 	kfree(dwc2_urb);
 
 	return retval;
@@ -2683,6 +2712,9 @@ static struct hc_driver dwc2_hc_driver = {
 	.hub_status_data = _dwc2_hcd_hub_status_data,
 	.hub_control = _dwc2_hcd_hub_control,
 	.clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete,
+
+	.bus_suspend = _dwc2_hcd_suspend,
+	.bus_resume = _dwc2_hcd_resume,
 };
 
 /*
@@ -2748,8 +2780,6 @@ static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
 		destroy_workqueue(hsotg->wq_otg);
 	}
 
-	kfree(hsotg->core_params);
-	hsotg->core_params = NULL;
 	del_timer(&hsotg->wkp_timer);
 }
 
@@ -2762,29 +2792,12 @@ static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
 }
 
 /*
- * Sets all parameters to the given value.
- *
- * Assumes that the dwc2_core_params struct contains only integers.
- */
-void dwc2_set_all_params(struct dwc2_core_params *params, int value)
-{
-	int *p = (int *)params;
-	size_t size = sizeof(*params) / sizeof(*p);
-	int i;
-
-	for (i = 0; i < size; i++)
-		p[i] = value;
-}
-EXPORT_SYMBOL_GPL(dwc2_set_all_params);
-
-/*
  * Initializes the HCD. This function allocates memory for and initializes the
  * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the
  * USB bus with the core and calls the hc_driver->start() function. It returns
  * a negative error on failure.
  */
-int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
-		  const struct dwc2_core_params *params)
+int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq)
 {
 	struct usb_hcd *hcd;
 	struct dwc2_host_chan *channel;
@@ -2797,12 +2810,6 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 
 	dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
 
-	/* Detect config values from hardware */
-	retval = dwc2_get_hwparams(hsotg);
-
-	if (retval)
-		return retval;
-
 	retval = -ENOMEM;
 
 	hcfg = readl(hsotg->regs + HCFG);
@@ -2821,15 +2828,6 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 	hsotg->last_frame_num = HFNUM_MAX_FRNUM;
 #endif
 
-	hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL);
-	if (!hsotg->core_params)
-		goto error1;
-
-	dwc2_set_all_params(hsotg->core_params, -1);
-
-	/* Validate parameter values */
-	dwc2_set_parameters(hsotg, params);
-
 	/* Check if the bus driver or platform code has setup a dma_mask */
 	if (hsotg->core_params->dma_enable > 0 &&
 	    hsotg->dev->dma_mask == NULL) {
@@ -2947,6 +2945,9 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 	/* Don't support SG list at this point */
 	hcd->self.sg_tablesize = 0;
 
+	if (!IS_ERR_OR_NULL(hsotg->uphy))
+		otg_set_host(hsotg->uphy->otg, &hcd->self);
+
 	/*
 	 * Finish generic HCD initialization and start the HCD. This function
 	 * allocates the DMA buffer pool, registers the USB bus, requests the
@@ -2979,7 +2980,6 @@ error1:
 	dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval);
 	return retval;
 }
-EXPORT_SYMBOL_GPL(dwc2_hcd_init);
 
 /*
  * Removes the HCD.
@@ -3000,6 +3000,9 @@ void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
 		return;
 	}
 
+	if (!IS_ERR_OR_NULL(hsotg->uphy))
+		otg_set_host(hsotg->uphy->otg, NULL);
+
 	usb_remove_hcd(hcd);
 	hsotg->priv = NULL;
 	dwc2_hcd_release(hsotg);
@@ -3010,4 +3013,3 @@ void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
 	kfree(hsotg->frame_num_array);
 #endif
 }
-EXPORT_SYMBOL_GPL(dwc2_hcd_remove);
diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h
index e69a843..7b5841c 100644
--- a/drivers/usb/dwc2/hcd.h
+++ b/drivers/usb/dwc2/hcd.h
@@ -451,13 +451,8 @@ static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe)
 	return !dwc2_hcd_is_pipe_in(pipe);
 }
 
-extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
-			 const struct dwc2_core_params *params);
+extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq);
 extern void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
-extern void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
-				const struct dwc2_core_params *params);
-extern void dwc2_set_all_params(struct dwc2_core_params *params, int value);
-extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
 
 /* Transaction Execution Functions */
 extern enum dwc2_transaction_type dwc2_hcd_select_transactions(
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
index 551ba87..4cc95df 100644
--- a/drivers/usb/dwc2/hcd_intr.c
+++ b/drivers/usb/dwc2/hcd_intr.c
@@ -350,6 +350,9 @@ static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
 		dev_vdbg(hsotg->dev,
 			 "--Port Interrupt HPRT0=0x%08x Port Connect Detected--\n",
 			 hprt0);
+		if (hsotg->lx_state != DWC2_L0)
+			usb_hcd_resume_root_hub(hsotg->priv);
+
 		hsotg->flags.b.port_connect_status_change = 1;
 		hsotg->flags.b.port_connect_status = 1;
 		hprt0_modify |= HPRT0_CONNDET;
@@ -463,10 +466,15 @@ static int dwc2_update_urb_state(struct dwc2_hsotg *hsotg,
 	}
 
 	/* Non DWORD-aligned buffer case handling */
-	if (chan->align_buf && xfer_length && chan->ep_is_in) {
+	if (chan->align_buf && xfer_length) {
 		dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
-		memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
-		       xfer_length);
+		dma_unmap_single(hsotg->dev, chan->qh->dw_align_buf_dma,
+				chan->qh->dw_align_buf_size,
+				chan->ep_is_in ?
+				DMA_FROM_DEVICE : DMA_TO_DEVICE);
+		if (chan->ep_is_in)
+			memcpy(urb->buf + urb->actual_length,
+					chan->qh->dw_align_buf, xfer_length);
 	}
 
 	dev_vdbg(hsotg->dev, "urb->actual_length=%d xfer_length=%d\n",
@@ -552,13 +560,18 @@ static enum dwc2_halt_status dwc2_update_isoc_urb_state(
 					chan, chnum, qtd, halt_status, NULL);
 
 		/* Non DWORD-aligned buffer case handling */
-		if (chan->align_buf && frame_desc->actual_length &&
-		    chan->ep_is_in) {
+		if (chan->align_buf && frame_desc->actual_length) {
 			dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
 				 __func__);
-			memcpy(urb->buf + frame_desc->offset +
-			       qtd->isoc_split_offset, chan->qh->dw_align_buf,
-			       frame_desc->actual_length);
+			dma_unmap_single(hsotg->dev, chan->qh->dw_align_buf_dma,
+					chan->qh->dw_align_buf_size,
+					chan->ep_is_in ?
+					DMA_FROM_DEVICE : DMA_TO_DEVICE);
+			if (chan->ep_is_in)
+				memcpy(urb->buf + frame_desc->offset +
+					qtd->isoc_split_offset,
+					chan->qh->dw_align_buf,
+					frame_desc->actual_length);
 		}
 		break;
 	case DWC2_HC_XFER_FRAME_OVERRUN:
@@ -581,13 +594,18 @@ static enum dwc2_halt_status dwc2_update_isoc_urb_state(
 					chan, chnum, qtd, halt_status, NULL);
 
 		/* Non DWORD-aligned buffer case handling */
-		if (chan->align_buf && frame_desc->actual_length &&
-		    chan->ep_is_in) {
+		if (chan->align_buf && frame_desc->actual_length) {
 			dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
 				 __func__);
-			memcpy(urb->buf + frame_desc->offset +
-			       qtd->isoc_split_offset, chan->qh->dw_align_buf,
-			       frame_desc->actual_length);
+			dma_unmap_single(hsotg->dev, chan->qh->dw_align_buf_dma,
+					chan->qh->dw_align_buf_size,
+					chan->ep_is_in ?
+					DMA_FROM_DEVICE : DMA_TO_DEVICE);
+			if (chan->ep_is_in)
+				memcpy(urb->buf + frame_desc->offset +
+					qtd->isoc_split_offset,
+					chan->qh->dw_align_buf,
+					frame_desc->actual_length);
 		}
 
 		/* Skip whole frame */
@@ -923,6 +941,8 @@ static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg,
 
 	if (chan->align_buf) {
 		dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
+		dma_unmap_single(hsotg->dev, chan->qh->dw_align_buf_dma,
+				chan->qh->dw_align_buf_size, DMA_FROM_DEVICE);
 		memcpy(qtd->urb->buf + frame_desc->offset +
 		       qtd->isoc_split_offset, chan->qh->dw_align_buf, len);
 	}
@@ -1152,8 +1172,14 @@ static void dwc2_update_urb_state_abn(struct dwc2_hsotg *hsotg,
 	/* Non DWORD-aligned buffer case handling */
 	if (chan->align_buf && xfer_length && chan->ep_is_in) {
 		dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
-		memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
-		       xfer_length);
+		dma_unmap_single(hsotg->dev, chan->qh->dw_align_buf_dma,
+				chan->qh->dw_align_buf_size,
+				chan->ep_is_in ?
+				DMA_FROM_DEVICE : DMA_TO_DEVICE);
+		if (chan->ep_is_in)
+			memcpy(urb->buf + urb->actual_length,
+					chan->qh->dw_align_buf,
+					xfer_length);
 	}
 
 	urb->actual_length += xfer_length;
@@ -1182,6 +1208,16 @@ static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg,
 			     struct dwc2_host_chan *chan, int chnum,
 			     struct dwc2_qtd *qtd)
 {
+	if (!qtd) {
+		dev_dbg(hsotg->dev, "%s: qtd is NULL\n", __func__);
+		return;
+	}
+
+	if (!qtd->urb) {
+		dev_dbg(hsotg->dev, "%s: qtd->urb is NULL\n", __func__);
+		return;
+	}
+
 	if (dbg_hc(chan))
 		dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n",
 			 chnum);
diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c
index bb97838..9b5c362 100644
--- a/drivers/usb/dwc2/hcd_queue.c
+++ b/drivers/usb/dwc2/hcd_queue.c
@@ -229,11 +229,13 @@ static struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
  */
 void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
 {
-	if (hsotg->core_params->dma_desc_enable > 0)
+	if (hsotg->core_params->dma_desc_enable > 0) {
 		dwc2_hcd_qh_free_ddma(hsotg, qh);
-	else if (qh->dw_align_buf)
-		dma_free_coherent(hsotg->dev, qh->dw_align_buf_size,
-				  qh->dw_align_buf, qh->dw_align_buf_dma);
+	} else {
+		/* kfree(NULL) is safe */
+		kfree(qh->dw_align_buf);
+		qh->dw_align_buf_dma = (dma_addr_t)0;
+	}
 	kfree(qh);
 }
 
@@ -761,6 +763,7 @@ void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
 
 /**
  * dwc2_hcd_qtd_add() - Adds a QTD to the QTD-list of a QH
+ *			Caller must hold driver lock.
  *
  * @hsotg:        The DWC HCD structure
  * @qtd:          The QTD to add
@@ -777,7 +780,6 @@ int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
 		     struct dwc2_qh **qh, gfp_t mem_flags)
 {
 	struct dwc2_hcd_urb *urb = qtd->urb;
-	unsigned long flags;
 	int allocated = 0;
 	int retval;
 
@@ -792,15 +794,12 @@ int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
 		allocated = 1;
 	}
 
-	spin_lock_irqsave(&hsotg->lock, flags);
-
 	retval = dwc2_hcd_qh_add(hsotg, *qh);
 	if (retval)
 		goto fail;
 
 	qtd->qh = *qh;
 	list_add_tail(&qtd->qtd_list_entry, &(*qh)->qtd_list);
-	spin_unlock_irqrestore(&hsotg->lock, flags);
 
 	return 0;
 
@@ -817,10 +816,7 @@ fail:
 					 qtd_list_entry)
 			dwc2_hcd_qtd_unlink_and_free(hsotg, qtd2, qh_tmp);
 
-		spin_unlock_irqrestore(&hsotg->lock, flags);
 		dwc2_hcd_qh_free(hsotg, qh_tmp);
-	} else {
-		spin_unlock_irqrestore(&hsotg->lock, flags);
 	}
 
 	return retval;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 185663e..9093530 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -47,6 +47,7 @@
 
 #include "core.h"
 #include "hcd.h"
+#include "debug.h"
 
 static const char dwc2_driver_name[] = "dwc2";
 
@@ -76,6 +77,8 @@ static const struct dwc2_core_params params_bcm2835 = {
 	.reload_ctl			= 0,
 	.ahbcfg				= 0x10,
 	.uframe_sched			= 0,
+	.external_id_pin_ctl		= -1,
+	.hibernation			= -1,
 };
 
 static const struct dwc2_core_params params_rk3066 = {
@@ -104,6 +107,8 @@ static const struct dwc2_core_params params_rk3066 = {
 	.reload_ctl			= -1,
 	.ahbcfg				= 0x7, /* INCR16 */
 	.uframe_sched			= -1,
+	.external_id_pin_ctl		= -1,
+	.hibernation			= -1,
 };
 
 /**
@@ -121,6 +126,7 @@ static int dwc2_driver_remove(struct platform_device *dev)
 {
 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
 
+	dwc2_debugfs_exit(hsotg);
 	if (hsotg->hcd_enabled)
 		dwc2_hcd_remove(hsotg);
 	if (hsotg->gadget_enabled)
@@ -237,6 +243,21 @@ static int dwc2_driver_probe(struct platform_device *dev)
 	spin_lock_init(&hsotg->lock);
 	mutex_init(&hsotg->init_mutex);
 
+	/* Detect config values from hardware */
+	retval = dwc2_get_hwparams(hsotg);
+	if (retval)
+		return retval;
+
+	hsotg->core_params = devm_kzalloc(&dev->dev,
+				sizeof(*hsotg->core_params), GFP_KERNEL);
+	if (!hsotg->core_params)
+		return -ENOMEM;
+
+	dwc2_set_all_params(hsotg->core_params, -1);
+
+	/* Validate parameter values */
+	dwc2_set_parameters(hsotg, params);
+
 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {
 		retval = dwc2_gadget_init(hsotg, irq);
 		if (retval)
@@ -245,7 +266,7 @@ static int dwc2_driver_probe(struct platform_device *dev)
 	}
 
 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
-		retval = dwc2_hcd_init(hsotg, irq, params);
+		retval = dwc2_hcd_init(hsotg, irq);
 		if (retval) {
 			if (hsotg->gadget_enabled)
 				s3c_hsotg_remove(hsotg);
@@ -256,6 +277,8 @@ static int dwc2_driver_probe(struct platform_device *dev)
 
 	platform_set_drvdata(dev, hsotg);
 
+	dwc2_debugfs_init(hsotg);
+
 	return retval;
 }
 
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 827c4f8..473bfaa 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -11,6 +11,13 @@ config USB_DWC3
 
 if USB_DWC3
 
+config USB_DWC3_ULPI
+	bool "Register ULPI PHY Interface"
+	depends on USB_ULPI_BUS=y || USB_ULPI_BUS=USB_DWC3
+	help
+	  Select this if you have ULPI type PHY attached to your DWC3
+	  controller.
+
 choice
 	bool "DWC3 Mode Selection"
 	default USB_DWC3_DUAL_ROLE if (USB && USB_GADGET)
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 46172f4..c7076e3 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -15,6 +15,10 @@ ifneq ($(filter y,$(CONFIG_USB_DWC3_GADGET) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
 	dwc3-y				+= gadget.o ep0.o
 endif
 
+ifneq ($(CONFIG_USB_DWC3_ULPI),)
+	dwc3-y				+= ulpi.o
+endif
+
 ifneq ($(CONFIG_DEBUG_FS),)
 	dwc3-y				+= debugfs.o
 endif
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 2bbab3d..5c110d8 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -117,6 +117,33 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
 }
 
 /**
+ * dwc3_soft_reset - Issue soft reset
+ * @dwc: Pointer to our controller context structure
+ */
+static int dwc3_soft_reset(struct dwc3 *dwc)
+{
+	unsigned long timeout;
+	u32 reg;
+
+	timeout = jiffies + msecs_to_jiffies(500);
+	dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
+	do {
+		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+		if (!(reg & DWC3_DCTL_CSFTRST))
+			break;
+
+		if (time_after(jiffies, timeout)) {
+			dev_err(dwc->dev, "Reset Timed Out\n");
+			return -ETIMEDOUT;
+		}
+
+		cpu_relax();
+	} while (true);
+
+	return 0;
+}
+
+/**
  * dwc3_free_one_event_buffer - Frees one event buffer
  * @dwc: Pointer to our controller context structure
  * @evt: Pointer to event buffer to be freed
@@ -367,10 +394,15 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc)
 /**
  * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
  * @dwc: Pointer to our controller context structure
+ *
+ * Returns 0 on success. The USB PHY interfaces are configured but not
+ * initialized. The PHY interfaces and the PHYs get initialized together with
+ * the core in dwc3_core_init.
  */
-static void dwc3_phy_setup(struct dwc3 *dwc)
+static int dwc3_phy_setup(struct dwc3 *dwc)
 {
 	u32 reg;
+	int ret;
 
 	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
 
@@ -409,10 +441,41 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
 
 	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
 
-	mdelay(100);
-
 	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
 
+	/* Select the HS PHY interface */
+	switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
+	case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
+		if (!strncmp(dwc->hsphy_interface, "utmi", 4)) {
+			reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
+			break;
+		} else if (!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
+			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
+			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+		} else {
+			dev_warn(dwc->dev, "HSPHY Interface not defined\n");
+
+			/* Relying on default value. */
+			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
+				break;
+		}
+		/* FALLTHROUGH */
+	case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
+		/* Making sure the interface and PHY are operational */
+		ret = dwc3_soft_reset(dwc);
+		if (ret)
+			return ret;
+
+		udelay(1);
+
+		ret = dwc3_ulpi_init(dwc);
+		if (ret)
+			return ret;
+		/* FALLTHROUGH */
+	default:
+		break;
+	}
+
 	/*
 	 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
 	 * '0' during coreConsultant configuration. So default value will
@@ -427,7 +490,7 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
 
 	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
 
-	mdelay(100);
+	return 0;
 }
 
 /**
@@ -438,7 +501,6 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
  */
 static int dwc3_core_init(struct dwc3 *dwc)
 {
-	unsigned long		timeout;
 	u32			hwparams4 = dwc->hwparams.hwparams4;
 	u32			reg;
 	int			ret;
@@ -466,21 +528,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	}
 
 	/* issue device SoftReset too */
-	timeout = jiffies + msecs_to_jiffies(500);
-	dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
-	do {
-		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
-		if (!(reg & DWC3_DCTL_CSFTRST))
-			break;
-
-		if (time_after(jiffies, timeout)) {
-			dev_err(dwc->dev, "Reset Timed Out\n");
-			ret = -ETIMEDOUT;
-			goto err0;
-		}
-
-		cpu_relax();
-	} while (true);
+	ret = dwc3_soft_reset(dwc);
+	if (ret)
+		goto err0;
 
 	ret = dwc3_core_soft_reset(dwc);
 	if (ret)
@@ -555,8 +605,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
 
 	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
 
-	dwc3_phy_setup(dwc);
-
 	ret = dwc3_alloc_scratch_buffers(dwc);
 	if (ret)
 		goto err1;
@@ -836,6 +884,8 @@ static int dwc3_probe(struct platform_device *pdev)
 				"snps,tx_de_emphasis_quirk");
 		of_property_read_u8(node, "snps,tx_de_emphasis",
 				&tx_de_emphasis);
+		of_property_read_string(node, "snps,hsphy_interface",
+					&dwc->hsphy_interface);
 	} else if (pdata) {
 		dwc->maximum_speed = pdata->maximum_speed;
 		dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@@ -863,6 +913,8 @@ static int dwc3_probe(struct platform_device *pdev)
 		dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
 		if (pdata->tx_de_emphasis)
 			tx_de_emphasis = pdata->tx_de_emphasis;
+
+		dwc->hsphy_interface = pdata->hsphy_interface;
 	}
 
 	/* default to superspeed if no maximum_speed passed */
@@ -875,12 +927,18 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc->hird_threshold = hird_threshold
 		| (dwc->is_utmi_l1_suspend << 4);
 
+	platform_set_drvdata(pdev, dwc);
+	dwc3_cache_hwparams(dwc);
+
+	ret = dwc3_phy_setup(dwc);
+	if (ret)
+		goto err0;
+
 	ret = dwc3_core_get_phy(dwc);
 	if (ret)
 		goto err0;
 
 	spin_lock_init(&dwc->lock);
-	platform_set_drvdata(pdev, dwc);
 
 	if (!dev->dma_mask) {
 		dev->dma_mask = dev->parent->dma_mask;
@@ -892,8 +950,6 @@ static int dwc3_probe(struct platform_device *pdev)
 	pm_runtime_get_sync(dev);
 	pm_runtime_forbid(dev);
 
-	dwc3_cache_hwparams(dwc);
-
 	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
 	if (ret) {
 		dev_err(dwc->dev, "failed to allocate event buffers\n");
@@ -964,6 +1020,7 @@ err2:
 
 err1:
 	dwc3_free_event_buffers(dwc);
+	dwc3_ulpi_exit(dwc);
 
 err0:
 	/*
@@ -999,6 +1056,7 @@ static int dwc3_remove(struct platform_device *pdev)
 	phy_power_off(dwc->usb3_generic_phy);
 
 	dwc3_core_exit(dwc);
+	dwc3_ulpi_exit(dwc);
 
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index fdab715..d70da20 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -30,6 +30,7 @@
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg.h>
+#include <linux/ulpi/interface.h>
 
 #include <linux/phy/phy.h>
 
@@ -173,6 +174,15 @@
 /* Global USB2 PHY Configuration Register */
 #define DWC3_GUSB2PHYCFG_PHYSOFTRST	(1 << 31)
 #define DWC3_GUSB2PHYCFG_SUSPHY		(1 << 6)
+#define DWC3_GUSB2PHYCFG_ULPI_UTMI	(1 << 4)
+
+/* Global USB2 PHY Vendor Control Register */
+#define DWC3_GUSB2PHYACC_NEWREGREQ	(1 << 25)
+#define DWC3_GUSB2PHYACC_BUSY		(1 << 23)
+#define DWC3_GUSB2PHYACC_WRITE		(1 << 22)
+#define DWC3_GUSB2PHYACC_ADDR(n)	(n << 16)
+#define DWC3_GUSB2PHYACC_EXTEND_ADDR(n)	(n << 8)
+#define DWC3_GUSB2PHYACC_DATA(n)	(n & 0xff)
 
 /* Global USB3 PIPE Control Register */
 #define DWC3_GUSB3PIPECTL_PHYSOFTRST	(1 << 31)
@@ -652,6 +662,7 @@ struct dwc3_scratchpad_array {
  * @usb3_phy: pointer to USB3 PHY
  * @usb2_generic_phy: pointer to USB2 PHY
  * @usb3_generic_phy: pointer to USB3 PHY
+ * @ulpi: pointer to ulpi interface
  * @dcfg: saved contents of DCFG register
  * @gctl: saved contents of GCTL register
  * @isoch_delay: wValue from Set Isochronous Delay request;
@@ -673,6 +684,7 @@ struct dwc3_scratchpad_array {
  * @test_mode_nr: test feature selector
  * @lpm_nyet_threshold: LPM NYET response threshold
  * @hird_threshold: HIRD threshold
+ * @hsphy_interface: "utmi" or "ulpi"
  * @delayed_status: true when gadget driver asks for delayed status
  * @ep0_bounced: true when we used bounce buffer
  * @ep0_expect_in: true when we expect a DATA IN transfer
@@ -739,6 +751,8 @@ struct dwc3 {
 	struct phy		*usb2_generic_phy;
 	struct phy		*usb3_generic_phy;
 
+	struct ulpi		*ulpi;
+
 	void __iomem		*regs;
 	size_t			regs_size;
 
@@ -800,6 +814,8 @@ struct dwc3 {
 	u8			lpm_nyet_threshold;
 	u8			hird_threshold;
 
+	const char		*hsphy_interface;
+
 	unsigned		delayed_status:1;
 	unsigned		ep0_bounced:1;
 	unsigned		ep0_expect_in:1;
@@ -1035,4 +1051,14 @@ static inline int dwc3_gadget_resume(struct dwc3 *dwc)
 }
 #endif /* !IS_ENABLED(CONFIG_USB_DWC3_HOST) */
 
+#if IS_ENABLED(CONFIG_USB_DWC3_ULPI)
+int dwc3_ulpi_init(struct dwc3 *dwc);
+void dwc3_ulpi_exit(struct dwc3 *dwc);
+#else
+static inline int dwc3_ulpi_init(struct dwc3 *dwc)
+{ return 0; }
+static inline void dwc3_ulpi_exit(struct dwc3 *dwc)
+{ }
+#endif
+
 #endif /* __DRIVERS_USB_DWC3_CORE_H */
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index b773fb5..27e4fc8 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -21,6 +21,8 @@
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/acpi.h>
 
 #include "platform_data.h"
 
@@ -31,6 +33,15 @@
 #define PCI_DEVICE_ID_INTEL_SPTLP	0x9d30
 #define PCI_DEVICE_ID_INTEL_SPTH	0xa130
 
+static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
+static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
+
+static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
+	{ "reset-gpios", &reset_gpios, 1 },
+	{ "cs-gpios", &cs_gpios, 1 },
+	{ },
+};
+
 static int dwc3_pci_quirks(struct pci_dev *pdev)
 {
 	if (pdev->vendor == PCI_VENDOR_ID_AMD &&
@@ -65,6 +76,30 @@ static int dwc3_pci_quirks(struct pci_dev *pdev)
 						sizeof(pdata));
 	}
 
+	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
+	    pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
+		struct gpio_desc *gpio;
+
+		acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
+					  acpi_dwc3_byt_gpios);
+
+		/* These GPIOs will turn on the USB2 PHY */
+		gpio = gpiod_get(&pdev->dev, "cs");
+		if (!IS_ERR(gpio)) {
+			gpiod_direction_output(gpio, 0);
+			gpiod_set_value_cansleep(gpio, 1);
+			gpiod_put(gpio);
+		}
+
+		gpio = gpiod_get(&pdev->dev, "reset");
+		if (!IS_ERR(gpio)) {
+			gpiod_direction_output(gpio, 0);
+			gpiod_set_value_cansleep(gpio, 1);
+			gpiod_put(gpio);
+			usleep_range(10000, 11000);
+		}
+	}
+
 	return 0;
 }
 
@@ -128,6 +163,7 @@ err:
 
 static void dwc3_pci_remove(struct pci_dev *pci)
 {
+	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
 	platform_device_unregister(pci_get_drvdata(pci));
 }
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 8946c32..333a7c0 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -291,6 +291,8 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
 			dwc3_trace(trace_dwc3_gadget,
 					"Command Complete --> %d",
 					DWC3_DGCMD_STATUS(reg));
+			if (DWC3_DGCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}
 
@@ -328,6 +330,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
 			dwc3_trace(trace_dwc3_gadget,
 					"Command Complete --> %d",
 					DWC3_DEPCMD_STATUS(reg));
+			if (DWC3_DEPCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}
 
@@ -1902,12 +1906,16 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
 {
 	unsigned		status = 0;
 	int			clean_busy;
+	u32			is_xfer_complete;
+
+	is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE);
 
 	if (event->status & DEPEVT_STATUS_BUSERR)
 		status = -ECONNRESET;
 
 	clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status);
-	if (clean_busy)
+	if (clean_busy && (is_xfer_complete ||
+				usb_endpoint_xfer_isoc(dep->endpoint.desc)))
 		dep->flags &= ~DWC3_EP_BUSY;
 
 	/*
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index a2bd464..d3614ec 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -45,4 +45,6 @@ struct dwc3_platform_data {
 
 	unsigned tx_de_emphasis_quirk:1;
 	unsigned tx_de_emphasis:2;
+
+	const char *hsphy_interface;
 };
diff --git a/drivers/usb/dwc3/ulpi.c b/drivers/usb/dwc3/ulpi.c
new file mode 100644
index 0000000..ec004c6
--- /dev/null
+++ b/drivers/usb/dwc3/ulpi.c
@@ -0,0 +1,91 @@
+/**
+ * ulpi.c - DesignWare USB3 Controller's ULPI PHY interface
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ulpi/regs.h>
+
+#include "core.h"
+#include "io.h"
+
+#define DWC3_ULPI_ADDR(a) \
+		((a >= ULPI_EXT_VENDOR_SPECIFIC) ? \
+		DWC3_GUSB2PHYACC_ADDR(ULPI_ACCESS_EXTENDED) | \
+		DWC3_GUSB2PHYACC_EXTEND_ADDR(a) : DWC3_GUSB2PHYACC_ADDR(a))
+
+static int dwc3_ulpi_busyloop(struct dwc3 *dwc)
+{
+	unsigned count = 1000;
+	u32 reg;
+
+	while (count--) {
+		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));
+		if (!(reg & DWC3_GUSB2PHYACC_BUSY))
+			return 0;
+		cpu_relax();
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int dwc3_ulpi_read(struct ulpi_ops *ops, u8 addr)
+{
+	struct dwc3 *dwc = dev_get_drvdata(ops->dev);
+	u32 reg;
+	int ret;
+
+	reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr);
+	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);
+
+	ret = dwc3_ulpi_busyloop(dwc);
+	if (ret)
+		return ret;
+
+	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));
+
+	return DWC3_GUSB2PHYACC_DATA(reg);
+}
+
+static int dwc3_ulpi_write(struct ulpi_ops *ops, u8 addr, u8 val)
+{
+	struct dwc3 *dwc = dev_get_drvdata(ops->dev);
+	u32 reg;
+
+	reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr);
+	reg |= DWC3_GUSB2PHYACC_WRITE | val;
+	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);
+
+	return dwc3_ulpi_busyloop(dwc);
+}
+
+static struct ulpi_ops dwc3_ulpi_ops = {
+	.read = dwc3_ulpi_read,
+	.write = dwc3_ulpi_write,
+};
+
+int dwc3_ulpi_init(struct dwc3 *dwc)
+{
+	/* Register the interface */
+	dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi_ops);
+	if (IS_ERR(dwc->ulpi)) {
+		dev_err(dwc->dev, "failed to register ULPI interface");
+		return PTR_ERR(dwc->ulpi);
+	}
+
+	return 0;
+}
+
+void dwc3_ulpi_exit(struct dwc3 *dwc)
+{
+	if (dwc->ulpi) {
+		ulpi_unregister_interface(dwc->ulpi);
+		dwc->ulpi = NULL;
+	}
+}
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 0567cca..919cdfd 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -258,15 +258,25 @@ struct usb_ep *usb_ep_autoconfig_ss(
 	/* First, apply chip-specific "best usage" knowledge.
 	 * This might make a good usb_gadget_ops hook ...
 	 */
-	if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
-		/* ep-e, ep-f are PIO with only 64 byte fifos */
-		ep = find_ep (gadget, "ep-e");
-		if (ep && ep_matches(gadget, ep, desc, ep_comp))
-			goto found_ep;
-		ep = find_ep (gadget, "ep-f");
+	if (gadget_is_net2280(gadget)) {
+		char name[8];
+
+		if (type == USB_ENDPOINT_XFER_INT) {
+			/* ep-e, ep-f are PIO with only 64 byte fifos */
+			ep = find_ep(gadget, "ep-e");
+			if (ep && ep_matches(gadget, ep, desc, ep_comp))
+				goto found_ep;
+			ep = find_ep(gadget, "ep-f");
+			if (ep && ep_matches(gadget, ep, desc, ep_comp))
+				goto found_ep;
+		}
+
+		/* USB3380: use same address for usb and hardware endpoints */
+		snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc),
+				usb_endpoint_dir_in(desc) ? "in" : "out");
+		ep = find_ep(gadget, name);
 		if (ep && ep_matches(gadget, ep, desc, ep_comp))
 			goto found_ep;
-
 	} else if (gadget_is_goku (gadget)) {
 		if (USB_ENDPOINT_XFER_INT == type) {
 			/* single buffering is enough */
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 6bdb570..e455eee 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -3433,6 +3433,7 @@ done:
 static void ffs_closed(struct ffs_data *ffs)
 {
 	struct ffs_dev *ffs_obj;
+	struct f_fs_opts *opts;
 
 	ENTER();
 	ffs_dev_lock();
@@ -3446,8 +3447,13 @@ static void ffs_closed(struct ffs_data *ffs)
 	if (ffs_obj->ffs_closed_callback)
 		ffs_obj->ffs_closed_callback(ffs);
 
-	if (!ffs_obj->opts || ffs_obj->opts->no_configfs
-	    || !ffs_obj->opts->func_inst.group.cg_item.ci_parent)
+	if (ffs_obj->opts)
+		opts = ffs_obj->opts;
+	else
+		goto done;
+
+	if (opts->no_configfs || !opts->func_inst.group.cg_item.ci_parent
+	    || !atomic_read(&opts->func_inst.group.cg_item.ci_kref.refcount))
 		goto done;
 
 	unregister_gadget_item(ffs_obj->opts->
diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index 829edf8..32985da 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -76,7 +76,7 @@ struct f_rndis {
 	u8				ethaddr[ETH_ALEN];
 	u32				vendorID;
 	const char			*manufacturer;
-	int				config;
+	struct rndis_params		*params;
 
 	struct usb_ep			*notify;
 	struct usb_request		*notify_req;
@@ -453,7 +453,7 @@ static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
 
 	/* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
 //	spin_lock(&dev->lock);
-	status = rndis_msg_parser(rndis->config, (u8 *) req->buf);
+	status = rndis_msg_parser(rndis->params, (u8 *) req->buf);
 	if (status < 0)
 		pr_err("RNDIS command error %d, %d/%d\n",
 			status, req->actual, req->length);
@@ -499,12 +499,12 @@ rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 			u32 n;
 
 			/* return the result */
-			buf = rndis_get_next_response(rndis->config, &n);
+			buf = rndis_get_next_response(rndis->params, &n);
 			if (buf) {
 				memcpy(req->buf, buf, n);
 				req->complete = rndis_response_complete;
 				req->context = rndis;
-				rndis_free_response(rndis->config, buf);
+				rndis_free_response(rndis->params, buf);
 				value = n;
 			}
 			/* else stalls ... spec says to avoid that */
@@ -597,7 +597,7 @@ static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		if (IS_ERR(net))
 			return PTR_ERR(net);
 
-		rndis_set_param_dev(rndis->config, net,
+		rndis_set_param_dev(rndis->params, net,
 				&rndis->port.cdc_filter);
 	} else
 		goto fail;
@@ -617,7 +617,7 @@ static void rndis_disable(struct usb_function *f)
 
 	DBG(cdev, "rndis deactivated\n");
 
-	rndis_uninit(rndis->config);
+	rndis_uninit(rndis->params);
 	gether_disconnect(&rndis->port);
 
 	usb_ep_disable(rndis->notify);
@@ -640,9 +640,9 @@ static void rndis_open(struct gether *geth)
 
 	DBG(cdev, "%s\n", __func__);
 
-	rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3,
+	rndis_set_param_medium(rndis->params, RNDIS_MEDIUM_802_3,
 				bitrate(cdev->gadget) / 100);
-	rndis_signal_connect(rndis->config);
+	rndis_signal_connect(rndis->params);
 }
 
 static void rndis_close(struct gether *geth)
@@ -651,8 +651,8 @@ static void rndis_close(struct gether *geth)
 
 	DBG(geth->func.config->cdev, "%s\n", __func__);
 
-	rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
-	rndis_signal_disconnect(rndis->config);
+	rndis_set_param_medium(rndis->params, RNDIS_MEDIUM_802_3, 0);
+	rndis_signal_disconnect(rndis->params);
 }
 
 /*-------------------------------------------------------------------------*/
@@ -796,11 +796,11 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 	rndis->port.open = rndis_open;
 	rndis->port.close = rndis_close;
 
-	rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
-	rndis_set_host_mac(rndis->config, rndis->ethaddr);
+	rndis_set_param_medium(rndis->params, RNDIS_MEDIUM_802_3, 0);
+	rndis_set_host_mac(rndis->params, rndis->ethaddr);
 
 	if (rndis->manufacturer && rndis->vendorID &&
-			rndis_set_param_vendor(rndis->config, rndis->vendorID,
+			rndis_set_param_vendor(rndis->params, rndis->vendorID,
 					       rndis->manufacturer)) {
 		status = -EINVAL;
 		goto fail_free_descs;
@@ -944,7 +944,7 @@ static void rndis_free(struct usb_function *f)
 	struct f_rndis_opts *opts;
 
 	rndis = func_to_rndis(f);
-	rndis_deregister(rndis->config);
+	rndis_deregister(rndis->params);
 	opts = container_of(f->fi, struct f_rndis_opts, func_inst);
 	kfree(rndis);
 	mutex_lock(&opts->lock);
@@ -968,7 +968,7 @@ static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
 {
 	struct f_rndis	*rndis;
 	struct f_rndis_opts *opts;
-	int status;
+	struct rndis_params *params;
 
 	/* allocate and initialize one new instance */
 	rndis = kzalloc(sizeof(*rndis), GFP_KERNEL);
@@ -1002,36 +1002,16 @@ static struct usb_function *rndis_alloc(struct usb_function_instance *fi)
 	rndis->port.func.disable = rndis_disable;
 	rndis->port.func.free_func = rndis_free;
 
-	status = rndis_register(rndis_response_available, rndis);
-	if (status < 0) {
+	params = rndis_register(rndis_response_available, rndis);
+	if (IS_ERR(params)) {
 		kfree(rndis);
-		return ERR_PTR(status);
+		return ERR_CAST(params);
 	}
-	rndis->config = status;
+	rndis->params = params;
 
 	return &rndis->port.func;
 }
 
-DECLARE_USB_FUNCTION(rndis, rndis_alloc_inst, rndis_alloc);
-
-static int __init rndis_mod_init(void)
-{
-	int ret;
-
-	ret = rndis_init();
-	if (ret)
-		return ret;
-
-	return usb_function_register(&rndisusb_func);
-}
-module_init(rndis_mod_init);
-
-static void __exit rndis_mod_exit(void)
-{
-	usb_function_unregister(&rndisusb_func);
-	rndis_exit();
-}
-module_exit(rndis_mod_exit);
-
+DECLARE_USB_FUNCTION_INIT(rndis, rndis_alloc_inst, rndis_alloc);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c
index 95d2324..70d3917 100644
--- a/drivers/usb/gadget/function/rndis.c
+++ b/drivers/usb/gadget/function/rndis.c
@@ -25,6 +25,7 @@
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
+#include <linux/idr.h>
 #include <linux/list.h>
 #include <linux/proc_fs.h>
 #include <linux/slab.h>
@@ -57,17 +58,26 @@ MODULE_PARM_DESC (rndis_debug, "enable debugging");
 #define rndis_debug		0
 #endif
 
-#define RNDIS_MAX_CONFIGS	1
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
 
+#define	NAME_TEMPLATE "driver/rndis-%03d"
 
-static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+static DEFINE_IDA(rndis_ida);
 
 /* Driver Version */
 static const __le32 rndis_driver_version = cpu_to_le32(1);
 
 /* Function Prototypes */
-static rndis_resp_t *rndis_add_response(int configNr, u32 length);
+static rndis_resp_t *rndis_add_response(struct rndis_params *params,
+					u32 length);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static const struct file_operations rndis_proc_fops;
 
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
 
 /* supported OIDs */
 static const u32 oid_supported_list[] =
@@ -160,7 +170,7 @@ static const u32 oid_supported_list[] =
 
 
 /* NDIS Functions */
-static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
+static int gen_ndis_query_resp(struct rndis_params *params, u32 OID, u8 *buf,
 			       unsigned buf_len, rndis_resp_t *r)
 {
 	int retval = -ENOTSUPP;
@@ -192,7 +202,7 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	outbuf = (__le32 *)&resp[1];
 	resp->InformationBufferOffset = cpu_to_le32(16);
 
-	net = rndis_per_dev_params[configNr].dev;
+	net = params->dev;
 	stats = dev_get_stats(net, &temp);
 
 	switch (OID) {
@@ -225,7 +235,7 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_GEN_MEDIA_SUPPORTED:
 		pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
-		*outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
+		*outbuf = cpu_to_le32(params->medium);
 		retval = 0;
 		break;
 
@@ -233,16 +243,15 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	case RNDIS_OID_GEN_MEDIA_IN_USE:
 		pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
 		/* one medium, one transport... (maybe you do it better) */
-		*outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
+		*outbuf = cpu_to_le32(params->medium);
 		retval = 0;
 		break;
 
 	/* mandatory */
 	case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
 		pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
-		if (rndis_per_dev_params[configNr].dev) {
-			*outbuf = cpu_to_le32(
-				rndis_per_dev_params[configNr].dev->mtu);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
 			retval = 0;
 		}
 		break;
@@ -251,21 +260,18 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	case RNDIS_OID_GEN_LINK_SPEED:
 		if (rndis_debug > 1)
 			pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
-		if (rndis_per_dev_params[configNr].media_state
-				== RNDIS_MEDIA_STATE_DISCONNECTED)
+		if (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED)
 			*outbuf = cpu_to_le32(0);
 		else
-			*outbuf = cpu_to_le32(
-				rndis_per_dev_params[configNr].speed);
+			*outbuf = cpu_to_le32(params->speed);
 		retval = 0;
 		break;
 
 	/* mandatory */
 	case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
 		pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
-		if (rndis_per_dev_params[configNr].dev) {
-			*outbuf = cpu_to_le32(
-				rndis_per_dev_params[configNr].dev->mtu);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
 			retval = 0;
 		}
 		break;
@@ -273,9 +279,8 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
 		pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
-		if (rndis_per_dev_params[configNr].dev) {
-			*outbuf = cpu_to_le32(
-				rndis_per_dev_params[configNr].dev->mtu);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
 			retval = 0;
 		}
 		break;
@@ -283,20 +288,16 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_GEN_VENDOR_ID:
 		pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
-		*outbuf = cpu_to_le32(
-			rndis_per_dev_params[configNr].vendorID);
+		*outbuf = cpu_to_le32(params->vendorID);
 		retval = 0;
 		break;
 
 	/* mandatory */
 	case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
 		pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
-		if (rndis_per_dev_params[configNr].vendorDescr) {
-			length = strlen(rndis_per_dev_params[configNr].
-					vendorDescr);
-			memcpy(outbuf,
-				rndis_per_dev_params[configNr].vendorDescr,
-				length);
+		if (params->vendorDescr) {
+			length = strlen(params->vendorDescr);
+			memcpy(outbuf, params->vendorDescr, length);
 		} else {
 			outbuf[0] = 0;
 		}
@@ -313,7 +314,7 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
 		pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
-		*outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
+		*outbuf = cpu_to_le32(*params->filter);
 		retval = 0;
 		break;
 
@@ -328,8 +329,7 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
 		if (rndis_debug > 1)
 			pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
-		*outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
-						.media_state);
+		*outbuf = cpu_to_le32(params->media_state);
 		retval = 0;
 		break;
 
@@ -409,11 +409,9 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_802_3_PERMANENT_ADDRESS:
 		pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
-		if (rndis_per_dev_params[configNr].dev) {
+		if (params->dev) {
 			length = ETH_ALEN;
-			memcpy(outbuf,
-				rndis_per_dev_params[configNr].host_mac,
-				length);
+			memcpy(outbuf, params->host_mac, length);
 			retval = 0;
 		}
 		break;
@@ -421,11 +419,9 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	/* mandatory */
 	case RNDIS_OID_802_3_CURRENT_ADDRESS:
 		pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
-		if (rndis_per_dev_params[configNr].dev) {
+		if (params->dev) {
 			length = ETH_ALEN;
-			memcpy(outbuf,
-				rndis_per_dev_params [configNr].host_mac,
-				length);
+			memcpy(outbuf, params->host_mac, length);
 			retval = 0;
 		}
 		break;
@@ -490,12 +486,11 @@ static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
 	return retval;
 }
 
-static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
-			     rndis_resp_t *r)
+static int gen_ndis_set_resp(struct rndis_params *params, u32 OID,
+			     u8 *buf, u32 buf_len, rndis_resp_t *r)
 {
 	rndis_set_cmplt_type *resp;
 	int i, retval = -ENOTSUPP;
-	struct rndis_params *params;
 
 	if (!r)
 		return -ENOMEM;
@@ -514,7 +509,6 @@ static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
 		}
 	}
 
-	params = &rndis_per_dev_params[configNr];
 	switch (OID) {
 	case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
 
@@ -563,16 +557,16 @@ static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
  * Response Functions
  */
 
-static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
+static int rndis_init_response(struct rndis_params *params,
+			       rndis_init_msg_type *buf)
 {
 	rndis_init_cmplt_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
 	if (!params->dev)
 		return -ENOTSUPP;
 
-	r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
+	r = rndis_add_response(params, sizeof(rndis_init_cmplt_type));
 	if (!r)
 		return -ENOMEM;
 	resp = (rndis_init_cmplt_type *)r->buf;
@@ -599,11 +593,11 @@ static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
 	return 0;
 }
 
-static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
+static int rndis_query_response(struct rndis_params *params,
+				rndis_query_msg_type *buf)
 {
 	rndis_query_cmplt_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
 	/* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
 	if (!params->dev)
@@ -615,7 +609,7 @@ static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
 	 * rndis_query_cmplt_type followed by data.
 	 * oid_supported_list is the largest data reply
 	 */
-	r = rndis_add_response(configNr,
+	r = rndis_add_response(params,
 		sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
 	if (!r)
 		return -ENOMEM;
@@ -624,7 +618,7 @@ static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
 	resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
 	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 
-	if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
+	if (gen_ndis_query_resp(params, le32_to_cpu(buf->OID),
 			le32_to_cpu(buf->InformationBufferOffset)
 					+ 8 + (u8 *)buf,
 			le32_to_cpu(buf->InformationBufferLength),
@@ -641,14 +635,14 @@ static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
 	return 0;
 }
 
-static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
+static int rndis_set_response(struct rndis_params *params,
+			      rndis_set_msg_type *buf)
 {
 	u32 BufLength, BufOffset;
 	rndis_set_cmplt_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
-	r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
+	r = rndis_add_response(params, sizeof(rndis_set_cmplt_type));
 	if (!r)
 		return -ENOMEM;
 	resp = (rndis_set_cmplt_type *)r->buf;
@@ -671,7 +665,7 @@ static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
 	resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
 	resp->MessageLength = cpu_to_le32(16);
 	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
-	if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
+	if (gen_ndis_set_resp(params, le32_to_cpu(buf->OID),
 			((u8 *)buf) + 8 + BufOffset, BufLength, r))
 		resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
 	else
@@ -681,13 +675,13 @@ static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
 	return 0;
 }
 
-static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
+static int rndis_reset_response(struct rndis_params *params,
+				rndis_reset_msg_type *buf)
 {
 	rndis_reset_cmplt_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
-	r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
+	r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type));
 	if (!r)
 		return -ENOMEM;
 	resp = (rndis_reset_cmplt_type *)r->buf;
@@ -702,16 +696,15 @@ static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
 	return 0;
 }
 
-static int rndis_keepalive_response(int configNr,
+static int rndis_keepalive_response(struct rndis_params *params,
 				    rndis_keepalive_msg_type *buf)
 {
 	rndis_keepalive_cmplt_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
 	/* host "should" check only in RNDIS_DATA_INITIALIZED state */
 
-	r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
+	r = rndis_add_response(params, sizeof(rndis_keepalive_cmplt_type));
 	if (!r)
 		return -ENOMEM;
 	resp = (rndis_keepalive_cmplt_type *)r->buf;
@@ -729,17 +722,15 @@ static int rndis_keepalive_response(int configNr,
 /*
  * Device to Host Comunication
  */
-static int rndis_indicate_status_msg(int configNr, u32 status)
+static int rndis_indicate_status_msg(struct rndis_params *params, u32 status)
 {
 	rndis_indicate_status_msg_type *resp;
 	rndis_resp_t *r;
-	struct rndis_params *params = rndis_per_dev_params + configNr;
 
 	if (params->state == RNDIS_UNINITIALIZED)
 		return -ENOTSUPP;
 
-	r = rndis_add_response(configNr,
-				sizeof(rndis_indicate_status_msg_type));
+	r = rndis_add_response(params, sizeof(rndis_indicate_status_msg_type));
 	if (!r)
 		return -ENOMEM;
 	resp = (rndis_indicate_status_msg_type *)r->buf;
@@ -754,53 +745,48 @@ static int rndis_indicate_status_msg(int configNr, u32 status)
 	return 0;
 }
 
-int rndis_signal_connect(int configNr)
+int rndis_signal_connect(struct rndis_params *params)
 {
-	rndis_per_dev_params[configNr].media_state
-			= RNDIS_MEDIA_STATE_CONNECTED;
-	return rndis_indicate_status_msg(configNr,
-					  RNDIS_STATUS_MEDIA_CONNECT);
+	params->media_state = RNDIS_MEDIA_STATE_CONNECTED;
+	return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_CONNECT);
 }
 EXPORT_SYMBOL_GPL(rndis_signal_connect);
 
-int rndis_signal_disconnect(int configNr)
+int rndis_signal_disconnect(struct rndis_params *params)
 {
-	rndis_per_dev_params[configNr].media_state
-			= RNDIS_MEDIA_STATE_DISCONNECTED;
-	return rndis_indicate_status_msg(configNr,
-					  RNDIS_STATUS_MEDIA_DISCONNECT);
+	params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
+	return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_DISCONNECT);
 }
 EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
 
-void rndis_uninit(int configNr)
+void rndis_uninit(struct rndis_params *params)
 {
 	u8 *buf;
 	u32 length;
 
-	if (configNr >= RNDIS_MAX_CONFIGS)
+	if (!params)
 		return;
-	rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
+	params->state = RNDIS_UNINITIALIZED;
 
 	/* drain the response queue */
-	while ((buf = rndis_get_next_response(configNr, &length)))
-		rndis_free_response(configNr, buf);
+	while ((buf = rndis_get_next_response(params, &length)))
+		rndis_free_response(params, buf);
 }
 EXPORT_SYMBOL_GPL(rndis_uninit);
 
-void rndis_set_host_mac(int configNr, const u8 *addr)
+void rndis_set_host_mac(struct rndis_params *params, const u8 *addr)
 {
-	rndis_per_dev_params[configNr].host_mac = addr;
+	params->host_mac = addr;
 }
 EXPORT_SYMBOL_GPL(rndis_set_host_mac);
 
 /*
  * Message Parser
  */
-int rndis_msg_parser(u8 configNr, u8 *buf)
+int rndis_msg_parser(struct rndis_params *params, u8 *buf)
 {
 	u32 MsgType, MsgLength;
 	__le32 *tmp;
-	struct rndis_params *params;
 
 	if (!buf)
 		return -ENOMEM;
@@ -809,9 +795,8 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 	MsgType   = get_unaligned_le32(tmp++);
 	MsgLength = get_unaligned_le32(tmp++);
 
-	if (configNr >= RNDIS_MAX_CONFIGS)
+	if (!params)
 		return -ENOTSUPP;
-	params = &rndis_per_dev_params[configNr];
 
 	/* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
 	 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
@@ -824,8 +809,7 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 		pr_debug("%s: RNDIS_MSG_INIT\n",
 			__func__);
 		params->state = RNDIS_INITIALIZED;
-		return rndis_init_response(configNr,
-					(rndis_init_msg_type *)buf);
+		return rndis_init_response(params, (rndis_init_msg_type *)buf);
 
 	case RNDIS_MSG_HALT:
 		pr_debug("%s: RNDIS_MSG_HALT\n",
@@ -838,17 +822,16 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 		return 0;
 
 	case RNDIS_MSG_QUERY:
-		return rndis_query_response(configNr,
+		return rndis_query_response(params,
 					(rndis_query_msg_type *)buf);
 
 	case RNDIS_MSG_SET:
-		return rndis_set_response(configNr,
-					(rndis_set_msg_type *)buf);
+		return rndis_set_response(params, (rndis_set_msg_type *)buf);
 
 	case RNDIS_MSG_RESET:
 		pr_debug("%s: RNDIS_MSG_RESET\n",
 			__func__);
-		return rndis_reset_response(configNr,
+		return rndis_reset_response(params,
 					(rndis_reset_msg_type *)buf);
 
 	case RNDIS_MSG_KEEPALIVE:
@@ -856,7 +839,7 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 		if (rndis_debug > 1)
 			pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
 				__func__);
-		return rndis_keepalive_response(configNr,
+		return rndis_keepalive_response(params,
 						 (rndis_keepalive_msg_type *)
 						 buf);
 
@@ -876,71 +859,131 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 }
 EXPORT_SYMBOL_GPL(rndis_msg_parser);
 
-int rndis_register(void (*resp_avail)(void *v), void *v)
+static inline int rndis_get_nr(void)
 {
-	u8 i;
+	return ida_simple_get(&rndis_ida, 0, 0, GFP_KERNEL);
+}
+
+static inline void rndis_put_nr(int nr)
+{
+	ida_simple_remove(&rndis_ida, nr);
+}
+
+struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v)
+{
+	struct rndis_params *params;
+	int i;
 
 	if (!resp_avail)
-		return -EINVAL;
+		return ERR_PTR(-EINVAL);
+
+	i = rndis_get_nr();
+	if (i < 0) {
+		pr_debug("failed\n");
+
+		return ERR_PTR(-ENODEV);
+	}
+
+	params = kzalloc(sizeof(*params), GFP_KERNEL);
+	if (!params) {
+		rndis_put_nr(i);
 
-	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
-		if (!rndis_per_dev_params[i].used) {
-			rndis_per_dev_params[i].used = 1;
-			rndis_per_dev_params[i].resp_avail = resp_avail;
-			rndis_per_dev_params[i].v = v;
-			pr_debug("%s: configNr = %d\n", __func__, i);
-			return i;
+		return ERR_PTR(-ENOMEM);
+	}
+
+#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
+	{
+		struct proc_dir_entry *proc_entry;
+		char name[20];
+
+		sprintf(name, NAME_TEMPLATE, i);
+		proc_entry = proc_create_data(name, 0660, NULL,
+					      &rndis_proc_fops, params);
+		if (!proc_entry) {
+			kfree(params);
+			rndis_put_nr(i);
+
+			return ERR_PTR(-EIO);
 		}
 	}
-	pr_debug("failed\n");
+#endif
+
+	params->confignr = i;
+	params->used = 1;
+	params->state = RNDIS_UNINITIALIZED;
+	params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
+	params->resp_avail = resp_avail;
+	params->v = v;
+	INIT_LIST_HEAD(&(params->resp_queue));
+	pr_debug("%s: configNr = %d\n", __func__, i);
 
-	return -ENODEV;
+	return params;
 }
 EXPORT_SYMBOL_GPL(rndis_register);
 
-void rndis_deregister(int configNr)
+void rndis_deregister(struct rndis_params *params)
 {
+	int i;
+
 	pr_debug("%s:\n", __func__);
 
-	if (configNr >= RNDIS_MAX_CONFIGS) return;
-	rndis_per_dev_params[configNr].used = 0;
+	if (!params)
+		return;
+
+	i = params->confignr;
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+	{
+		char name[20];
+
+		sprintf(name, NAME_TEMPLATE, i);
+		remove_proc_entry(name, NULL);
+	}
+#endif
+
+	kfree(params);
+	rndis_put_nr(i);
 }
 EXPORT_SYMBOL_GPL(rndis_deregister);
-
-int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
+int rndis_set_param_dev(struct rndis_params *params, struct net_device *dev,
+			u16 *cdc_filter)
 {
 	pr_debug("%s:\n", __func__);
 	if (!dev)
 		return -EINVAL;
-	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+	if (!params)
+		return -1;
 
-	rndis_per_dev_params[configNr].dev = dev;
-	rndis_per_dev_params[configNr].filter = cdc_filter;
+	params->dev = dev;
+	params->filter = cdc_filter;
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rndis_set_param_dev);
 
-int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
+int rndis_set_param_vendor(struct rndis_params *params, u32 vendorID,
+			   const char *vendorDescr)
 {
 	pr_debug("%s:\n", __func__);
 	if (!vendorDescr) return -1;
-	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+	if (!params)
+		return -1;
 
-	rndis_per_dev_params[configNr].vendorID = vendorID;
-	rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
+	params->vendorID = vendorID;
+	params->vendorDescr = vendorDescr;
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
 
-int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
+int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed)
 {
 	pr_debug("%s: %u %u\n", __func__, medium, speed);
-	if (configNr >= RNDIS_MAX_CONFIGS) return -1;
+	if (!params)
+		return -1;
 
-	rndis_per_dev_params[configNr].medium = medium;
-	rndis_per_dev_params[configNr].speed = speed;
+	params->medium = medium;
+	params->speed = speed;
 
 	return 0;
 }
@@ -961,13 +1004,12 @@ void rndis_add_hdr(struct sk_buff *skb)
 }
 EXPORT_SYMBOL_GPL(rndis_add_hdr);
 
-void rndis_free_response(int configNr, u8 *buf)
+void rndis_free_response(struct rndis_params *params, u8 *buf)
 {
 	rndis_resp_t *r;
 	struct list_head *act, *tmp;
 
-	list_for_each_safe(act, tmp,
-			&(rndis_per_dev_params[configNr].resp_queue))
+	list_for_each_safe(act, tmp, &(params->resp_queue))
 	{
 		r = list_entry(act, rndis_resp_t, list);
 		if (r && r->buf == buf) {
@@ -978,15 +1020,14 @@ void rndis_free_response(int configNr, u8 *buf)
 }
 EXPORT_SYMBOL_GPL(rndis_free_response);
 
-u8 *rndis_get_next_response(int configNr, u32 *length)
+u8 *rndis_get_next_response(struct rndis_params *params, u32 *length)
 {
 	rndis_resp_t *r;
 	struct list_head *act, *tmp;
 
 	if (!length) return NULL;
 
-	list_for_each_safe(act, tmp,
-			&(rndis_per_dev_params[configNr].resp_queue))
+	list_for_each_safe(act, tmp, &(params->resp_queue))
 	{
 		r = list_entry(act, rndis_resp_t, list);
 		if (!r->send) {
@@ -1000,7 +1041,7 @@ u8 *rndis_get_next_response(int configNr, u32 *length)
 }
 EXPORT_SYMBOL_GPL(rndis_get_next_response);
 
-static rndis_resp_t *rndis_add_response(int configNr, u32 length)
+static rndis_resp_t *rndis_add_response(struct rndis_params *params, u32 length)
 {
 	rndis_resp_t *r;
 
@@ -1012,8 +1053,7 @@ static rndis_resp_t *rndis_add_response(int configNr, u32 length)
 	r->length = length;
 	r->send = 0;
 
-	list_add_tail(&r->list,
-		&(rndis_per_dev_params[configNr].resp_queue));
+	list_add_tail(&r->list, &(params->resp_queue));
 	return r;
 }
 
@@ -1103,11 +1143,11 @@ static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
 			break;
 		case 'C':
 		case 'c':
-			rndis_signal_connect(p->confignr);
+			rndis_signal_connect(p);
 			break;
 		case 'D':
 		case 'd':
-			rndis_signal_disconnect(p->confignr);
+			rndis_signal_disconnect(p);
 			break;
 		default:
 			if (fl_speed) p->speed = speed;
@@ -1137,54 +1177,4 @@ static const struct file_operations rndis_proc_fops = {
 
 #define	NAME_TEMPLATE "driver/rndis-%03d"
 
-static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
-
 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
-
-
-int rndis_init(void)
-{
-	u8 i;
-
-	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
-#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
-		char name [20];
-
-		sprintf(name, NAME_TEMPLATE, i);
-		rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
-					&rndis_proc_fops,
-					(void *)(rndis_per_dev_params + i));
-		if (!rndis_connect_state[i]) {
-			pr_debug("%s: remove entries", __func__);
-			while (i) {
-				sprintf(name, NAME_TEMPLATE, --i);
-				remove_proc_entry(name, NULL);
-			}
-			pr_debug("\n");
-			return -EIO;
-		}
-#endif
-		rndis_per_dev_params[i].confignr = i;
-		rndis_per_dev_params[i].used = 0;
-		rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
-		rndis_per_dev_params[i].media_state
-				= RNDIS_MEDIA_STATE_DISCONNECTED;
-		INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
-	}
-
-	return 0;
-}
-
-void rndis_exit(void)
-{
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-	u8 i;
-	char name[20];
-
-	for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
-		sprintf(name, NAME_TEMPLATE, i);
-		remove_proc_entry(name, NULL);
-	}
-#endif
-}
-
diff --git a/drivers/usb/gadget/function/rndis.h b/drivers/usb/gadget/function/rndis.h
index 0f4abb4..ef92eb6 100644
--- a/drivers/usb/gadget/function/rndis.h
+++ b/drivers/usb/gadget/function/rndis.h
@@ -177,7 +177,7 @@ typedef struct rndis_resp_t
 
 typedef struct rndis_params
 {
-	u8			confignr;
+	int			confignr;
 	u8			used;
 	u16			saved_filter;
 	enum rndis_state	state;
@@ -197,24 +197,25 @@ typedef struct rndis_params
 } rndis_params;
 
 /* RNDIS Message parser and other useless functions */
-int  rndis_msg_parser (u8 configNr, u8 *buf);
-int  rndis_register(void (*resp_avail)(void *v), void *v);
-void rndis_deregister (int configNr);
-int  rndis_set_param_dev (u8 configNr, struct net_device *dev,
+int  rndis_msg_parser(struct rndis_params *params, u8 *buf);
+struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v);
+void rndis_deregister(struct rndis_params *params);
+int  rndis_set_param_dev(struct rndis_params *params, struct net_device *dev,
 			 u16 *cdc_filter);
-int  rndis_set_param_vendor (u8 configNr, u32 vendorID,
+int  rndis_set_param_vendor(struct rndis_params *params, u32 vendorID,
 			    const char *vendorDescr);
-int  rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
-void rndis_add_hdr (struct sk_buff *skb);
+int  rndis_set_param_medium(struct rndis_params *params, u32 medium,
+			     u32 speed);
+void rndis_add_hdr(struct sk_buff *skb);
 int rndis_rm_hdr(struct gether *port, struct sk_buff *skb,
 			struct sk_buff_head *list);
-u8   *rndis_get_next_response (int configNr, u32 *length);
-void rndis_free_response (int configNr, u8 *buf);
-
-void rndis_uninit (int configNr);
-int  rndis_signal_connect (int configNr);
-int  rndis_signal_disconnect (int configNr);
-int  rndis_state (int configNr);
-extern void rndis_set_host_mac (int configNr, const u8 *addr);
+u8   *rndis_get_next_response(struct rndis_params *params, u32 *length);
+void rndis_free_response(struct rndis_params *params, u8 *buf);
+
+void rndis_uninit(struct rndis_params *params);
+int  rndis_signal_connect(struct rndis_params *params);
+int  rndis_signal_disconnect(struct rndis_params *params);
+int  rndis_state(struct rndis_params *params);
+extern void rndis_set_host_mac(struct rndis_params *params, const u8 *addr);
 
 #endif  /* _LINUX_RNDIS_H */
diff --git a/drivers/usb/gadget/function/u_rndis.h b/drivers/usb/gadget/function/u_rndis.h
index e902aa4..4eafd50 100644
--- a/drivers/usb/gadget/function/u_rndis.h
+++ b/drivers/usb/gadget/function/u_rndis.h
@@ -39,8 +39,6 @@ struct f_rndis_opts {
 	int				refcnt;
 };
 
-int rndis_init(void);
-void rndis_exit(void);
 void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net);
 
 #endif /* U_RNDIS_H */
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index ebe409b..7d3bb62 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -56,7 +56,6 @@ struct uvc_event
 #include <linux/usb/composite.h>
 #include <linux/usb/gadget.h>
 #include <linux/videodev2.h>
-#include <linux/version.h>
 #include <media/v4l2-fh.h>
 #include <media/v4l2-device.h>
 
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 351d485..4095cce 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -704,8 +704,8 @@ static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
 	unsigned long flags;
 	int ret;
 
-	DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
-		ep->ep.name, req->req.length, req->req.dma,
+	DBG(DBG_DMA, "%s: req l/%u d/%pad %c%c%c\n",
+		ep->ep.name, req->req.length, &req->req.dma,
 		req->req.zero ? 'Z' : 'z',
 		req->req.short_not_ok ? 'S' : 's',
 		req->req.no_interrupt ? 'I' : 'i');
@@ -2203,7 +2203,7 @@ static int usba_udc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int usba_udc_suspend(struct device *dev)
 {
 	struct usba_udc *udc = dev_get_drvdata(dev);
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 9871b90..2bee912 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -123,6 +123,11 @@ static char *type_string(u8 bmAttributes)
 #define valid_bit	cpu_to_le32(BIT(VALID_BIT))
 #define dma_done_ie	cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE))
 
+static void ep_clear_seqnum(struct net2280_ep *ep);
+static void stop_activity(struct net2280 *dev,
+					struct usb_gadget_driver *driver);
+static void ep0_start(struct net2280 *dev);
+
 /*-------------------------------------------------------------------------*/
 static inline void enable_pciirqenb(struct net2280_ep *ep)
 {
@@ -142,7 +147,9 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 {
 	struct net2280		*dev;
 	struct net2280_ep	*ep;
-	u32			max, tmp;
+	u32			max;
+	u32 tmp = 0;
+	u32 type;
 	unsigned long		flags;
 	static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 };
 	int ret = 0;
@@ -198,15 +205,29 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 
 	/* set type, direction, address; reset fifo counters */
 	writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
-	tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
-	if (tmp == USB_ENDPOINT_XFER_INT) {
+
+	if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) {
+		tmp = readl(&ep->cfg->ep_cfg);
+		/* If USB ep number doesn't match hardware ep number */
+		if ((tmp & 0xf) != usb_endpoint_num(desc)) {
+			ret = -EINVAL;
+			spin_unlock_irqrestore(&dev->lock, flags);
+			goto print_err;
+		}
+		if (ep->is_in)
+			tmp &= ~USB3380_EP_CFG_MASK_IN;
+		else
+			tmp &= ~USB3380_EP_CFG_MASK_OUT;
+	}
+	type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
+	if (type == USB_ENDPOINT_XFER_INT) {
 		/* erratum 0105 workaround prevents hs NYET */
 		if (dev->chiprev == 0100 &&
 				dev->gadget.speed == USB_SPEED_HIGH &&
 				!(desc->bEndpointAddress & USB_DIR_IN))
 			writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE),
 				&ep->regs->ep_rsp);
-	} else if (tmp == USB_ENDPOINT_XFER_BULK) {
+	} else if (type == USB_ENDPOINT_XFER_BULK) {
 		/* catch some particularly blatant driver bugs */
 		if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) ||
 		    (dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
@@ -216,10 +237,10 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 			goto print_err;
 		}
 	}
-	ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC);
+	ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC);
 	/* Enable this endpoint */
 	if (dev->quirks & PLX_LEGACY) {
-		tmp <<= ENDPOINT_TYPE;
+		tmp |= type << ENDPOINT_TYPE;
 		tmp |= desc->bEndpointAddress;
 		/* default full fifo lines */
 		tmp |= (4 << ENDPOINT_BYTE_COUNT);
@@ -228,17 +249,17 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	} else {
 		/* In Legacy mode, only OUT endpoints are used */
 		if (dev->enhanced_mode && ep->is_in) {
-			tmp <<= IN_ENDPOINT_TYPE;
+			tmp |= type << IN_ENDPOINT_TYPE;
 			tmp |= BIT(IN_ENDPOINT_ENABLE);
-			/* Not applicable to Legacy */
-			tmp |= BIT(ENDPOINT_DIRECTION);
 		} else {
-			tmp <<= OUT_ENDPOINT_TYPE;
+			tmp |= type << OUT_ENDPOINT_TYPE;
 			tmp |= BIT(OUT_ENDPOINT_ENABLE);
 			tmp |= (ep->is_in << ENDPOINT_DIRECTION);
 		}
 
-		tmp |= usb_endpoint_num(desc);
+		tmp |= (4 << ENDPOINT_BYTE_COUNT);
+		if (!dev->enhanced_mode)
+			tmp |= usb_endpoint_num(desc);
 		tmp |= (ep->ep.maxburst << MAX_BURST_SIZE);
 	}
 
@@ -256,6 +277,8 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 			BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
 	}
 
+	if (dev->quirks & PLX_SUPERSPEED)
+		ep_clear_seqnum(ep);
 	writel(tmp, &ep->cfg->ep_cfg);
 
 	/* enable irqs */
@@ -441,6 +464,13 @@ static void ep_reset_338x(struct net2280_regs __iomem *regs,
 	       BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
 	       BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
 	       BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat);
+
+	tmp = readl(&ep->cfg->ep_cfg);
+	if (ep->is_in)
+		tmp &= ~USB3380_EP_CFG_MASK_IN;
+	else
+		tmp &= ~USB3380_EP_CFG_MASK_OUT;
+	writel(tmp, &ep->cfg->ep_cfg);
 }
 
 static void nuke(struct net2280_ep *);
@@ -1468,11 +1498,14 @@ static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
 	spin_lock_irqsave(&dev->lock, flags);
 	tmp = readl(&dev->usb->usbctl);
 	dev->softconnect = (is_on != 0);
-	if (is_on)
-		tmp |= BIT(USB_DETECT_ENABLE);
-	else
-		tmp &= ~BIT(USB_DETECT_ENABLE);
-	writel(tmp, &dev->usb->usbctl);
+	if (is_on) {
+		ep0_start(dev);
+		writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
+	} else {
+		writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
+		stop_activity(dev, dev->driver);
+	}
+
 	spin_unlock_irqrestore(&dev->lock, flags);
 
 	return 0;
@@ -1860,8 +1893,8 @@ static void defect7374_enable_data_eps_zero(struct net2280 *dev)
 	tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) |
 			(2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) |
 			((dev->enhanced_mode) ?
-			 BIT(OUT_ENDPOINT_ENABLE) : BIT(ENDPOINT_ENABLE)) |
-			BIT(IN_ENDPOINT_ENABLE));
+			 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) :
+			 BIT(ENDPOINT_ENABLE)));
 
 	for (i = 1; i < 5; i++)
 		writel(tmp, &dev->ep[i].cfg->ep_cfg);
@@ -1975,9 +2008,15 @@ static void usb_reset_338x(struct net2280 *dev)
 	/* clear old dma and irq state */
 	for (tmp = 0; tmp < 4; tmp++) {
 		struct net2280_ep *ep = &dev->ep[tmp + 1];
+		struct net2280_dma_regs __iomem *dma;
 
-		if (ep->dma)
+		if (ep->dma) {
 			abort_dma(ep);
+		} else {
+			dma = &dev->dma[tmp];
+			writel(BIT(DMA_ABORT), &dma->dmastat);
+			writel(0, &dma->dmactl);
+		}
 	}
 
 	writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1);
@@ -2065,6 +2104,12 @@ static void usb_reinit_338x(struct net2280 *dev)
 
 		if (dev->enhanced_mode) {
 			ep->cfg = &dev->epregs[ne[i]];
+			/*
+			 * Set USB endpoint number, hardware allows same number
+			 * in both directions.
+			 */
+			 if (i > 0 && i < 5)
+				writel(ne[i], &ep->cfg->ep_cfg);
 			ep->regs = (struct net2280_ep_regs __iomem *)
 				(((void __iomem *)&dev->epregs[ne[i]]) +
 				ep_reg_addr[i]);
@@ -2874,6 +2919,26 @@ next_endpoints3:
 	return;
 }
 
+static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0)
+{
+	u32 index;
+	u32 bit;
+
+	for (index = 0; index < ARRAY_SIZE(ep_bit); index++) {
+		bit = BIT(ep_bit[index]);
+
+		if (!stat0)
+			break;
+
+		if (!(stat0 & bit))
+			continue;
+
+		stat0 &= ~bit;
+
+		handle_ep_small(&dev->ep[index]);
+	}
+}
+
 static void handle_stat0_irqs(struct net2280 *dev, u32 stat)
 {
 	struct net2280_ep	*ep;
@@ -3098,20 +3163,31 @@ do_stall:
 #undef	w_length
 
 next_endpoints:
-	/* endpoint data irq ? */
-	scratch = stat & 0x7f;
-	stat &= ~0x7f;
-	for (num = 0; scratch; num++) {
-		u32		t;
-
-		/* do this endpoint's FIFO and queue need tending? */
-		t = BIT(num);
-		if ((scratch & t) == 0)
-			continue;
-		scratch ^= t;
+	if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) {
+		u32 mask = (BIT(ENDPOINT_0_INTERRUPT) |
+			USB3380_IRQSTAT0_EP_INTR_MASK_IN |
+			USB3380_IRQSTAT0_EP_INTR_MASK_OUT);
+
+		if (stat & mask) {
+			usb338x_handle_ep_intr(dev, stat & mask);
+			stat &= ~mask;
+		}
+	} else {
+		/* endpoint data irq ? */
+		scratch = stat & 0x7f;
+		stat &= ~0x7f;
+		for (num = 0; scratch; num++) {
+			u32		t;
+
+			/* do this endpoint's FIFO and queue need tending? */
+			t = BIT(num);
+			if ((scratch & t) == 0)
+				continue;
+			scratch ^= t;
 
-		ep = &dev->ep[num];
-		handle_ep_small(ep);
+			ep = &dev->ep[num];
+			handle_ep_small(ep);
+		}
 	}
 
 	if (stat)
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index b808951..2979575 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -92,40 +92,38 @@ static struct s3c2410_udc_mach_info *udc_info;
 
 static uint32_t s3c2410_ticks = 0;
 
-static int dprintk(int level, const char *fmt, ...)
+__printf(2, 3)
+static void dprintk(int level, const char *fmt, ...)
 {
-	static char printk_buf[1024];
 	static long prevticks;
 	static int invocation;
+	struct va_format vaf;
 	va_list args;
-	int len;
 
 	if (level > USB_S3C2410_DEBUG_LEVEL)
-		return 0;
+		return;
+
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
 
 	if (s3c2410_ticks != prevticks) {
 		prevticks = s3c2410_ticks;
 		invocation = 0;
 	}
 
-	len = scnprintf(printk_buf,
-			sizeof(printk_buf), "%1lu.%02d USB: ",
-			prevticks, invocation++);
+	pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
 
-	va_start(args, fmt);
-	len = vscnprintf(printk_buf+len,
-			sizeof(printk_buf)-len, fmt, args);
 	va_end(args);
-
-	pr_debug("%s", printk_buf);
-	return len;
 }
 #else
-static int dprintk(int level, const char *fmt, ...)
+__printf(2, 3)
+static void dprintk(int level, const char *fmt, ...)
 {
-	return 0;
 }
 #endif
+
 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 {
 	u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 220fd4d..c41fe58 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -438,11 +438,15 @@ static void am35x_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 }
 
 static const struct musb_platform_ops am35x_ops = {
-	.quirks		= MUSB_INDEXED_EP,
+	.quirks		= MUSB_DMA_INVENTRA | MUSB_INDEXED_EP,
 	.init		= am35x_musb_init,
 	.exit		= am35x_musb_exit,
 
 	.read_fifo	= am35x_read_fifo,
+#ifdef CONFIG_USB_INVENTRA_DMA
+	.dma_init	= musbhs_dma_controller_create,
+	.dma_exit	= musbhs_dma_controller_destroy,
+#endif
 	.enable		= am35x_musb_enable,
 	.disable	= am35x_musb_disable,
 
@@ -565,7 +569,7 @@ static int am35x_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int am35x_suspend(struct device *dev)
 {
 	struct am35x_glue	*glue = dev_get_drvdata(dev);
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 6123b74..310238c 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -465,6 +465,7 @@ static int bfin_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops bfin_ops = {
+	.quirks		= MUSB_DMA_INVENTRA,
 	.init		= bfin_musb_init,
 	.exit		= bfin_musb_exit,
 
@@ -477,6 +478,10 @@ static const struct musb_platform_ops bfin_ops = {
 	.fifo_mode	= 2,
 	.read_fifo	= bfin_read_fifo,
 	.write_fifo	= bfin_write_fifo,
+#ifdef CONFIG_USB_INVENTRA_DMA
+	.dma_init	= musbhs_dma_controller_create,
+	.dma_exit	= musbhs_dma_controller_destroy,
+#endif
 	.enable		= bfin_musb_enable,
 	.disable	= bfin_musb_disable,
 
diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index 904fb85..cc13410 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -1297,7 +1297,8 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
 EXPORT_SYMBOL_GPL(cppi_interrupt);
 
 /* Instantiate a software object representing a DMA controller. */
-struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *mregs)
+struct dma_controller *
+cppi_dma_controller_create(struct musb *musb, void __iomem *mregs)
 {
 	struct cppi		*controller;
 	struct device		*dev = musb->controller;
@@ -1334,7 +1335,7 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *mr
 	if (irq > 0) {
 		if (request_irq(irq, cppi_interrupt, 0, "cppi-dma", musb)) {
 			dev_err(dev, "request_irq %d failed!\n", irq);
-			dma_controller_destroy(&controller->controller);
+			musb_dma_controller_destroy(&controller->controller);
 			return NULL;
 		}
 		controller->irq = irq;
@@ -1343,11 +1344,12 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *mr
 	cppi_controller_start(controller);
 	return &controller->controller;
 }
+EXPORT_SYMBOL_GPL(cppi_dma_controller_create);
 
 /*
  *  Destroy a previously-instantiated DMA controller.
  */
-void dma_controller_destroy(struct dma_controller *c)
+void cppi_dma_controller_destroy(struct dma_controller *c)
 {
 	struct cppi	*cppi;
 
@@ -1363,6 +1365,7 @@ void dma_controller_destroy(struct dma_controller *c)
 
 	kfree(cppi);
 }
+EXPORT_SYMBOL_GPL(cppi_dma_controller_destroy);
 
 /*
  * Context: controller irqlocked, endpoint selected
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 9a9c82a..b03d3b8 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -458,11 +458,15 @@ static int da8xx_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops da8xx_ops = {
-	.quirks		= MUSB_INDEXED_EP,
+	.quirks		= MUSB_DMA_CPPI | MUSB_INDEXED_EP,
 	.init		= da8xx_musb_init,
 	.exit		= da8xx_musb_exit,
 
 	.fifo_mode	= 2,
+#ifdef CONFIG_USB_TI_CPPI_DMA
+	.dma_init	= cppi_dma_controller_create,
+	.dma_exit	= cppi_dma_controller_destroy,
+#endif
 	.enable		= da8xx_musb_enable,
 	.disable	= da8xx_musb_disable,
 
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 3c1d9b2..cee61a5 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -284,7 +284,7 @@ static irqreturn_t davinci_musb_interrupt(int irq, void *__hci)
 	 * mask, state, "vector", and EOI registers.
 	 */
 	cppi = container_of(musb->dma_controller, struct cppi, controller);
-	if (is_cppi_enabled() && musb->dma_controller && !cppi->irq)
+	if (is_cppi_enabled(musb) && musb->dma_controller && !cppi->irq)
 		retval = cppi_interrupt(irq, __hci);
 
 	/* ack and handle non-CPPI interrupts */
@@ -491,9 +491,14 @@ static int davinci_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops davinci_ops = {
+	.quirks		= MUSB_DMA_CPPI,
 	.init		= davinci_musb_init,
 	.exit		= davinci_musb_exit,
 
+#ifdef CONFIG_USB_TI_CPPI_DMA
+	.dma_init	= cppi_dma_controller_create,
+	.dma_exit	= cppi_dma_controller_destroy,
+#endif
 	.enable		= davinci_musb_enable,
 	.disable	= davinci_musb_disable,
 
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
index bb7b263..5e5a8fa 100644
--- a/drivers/usb/musb/jz4740.c
+++ b/drivers/usb/musb/jz4740.c
@@ -105,8 +105,12 @@ static int jz4740_musb_exit(struct musb *musb)
 	return 0;
 }
 
+/*
+ * DMA has not been confirmed to work with CONFIG_USB_INVENTRA_DMA,
+ * so let's not set up the dma function pointers yet.
+ */
 static const struct musb_platform_ops jz4740_musb_ops = {
-	.quirks		= MUSB_INDEXED_EP,
+	.quirks		= MUSB_DMA_INVENTRA | MUSB_INDEXED_EP,
 	.fifo_mode	= 2,
 	.init		= jz4740_musb_init,
 	.exit		= jz4740_musb_exit,
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 3789b08..d878aee 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -251,6 +251,11 @@ static u32 musb_indexed_ep_offset(u8 epnum, u16 offset)
 	return 0x10 + offset;
 }
 
+static u32 musb_default_busctl_offset(u8 epnum, u16 offset)
+{
+	return 0x80 + (0x08 * epnum) + offset;
+}
+
 static u8 musb_default_readb(const void __iomem *addr, unsigned offset)
 {
 	return __raw_readb(addr + offset);
@@ -309,7 +314,7 @@ static void musb_default_write_fifo(struct musb_hw_ep *hw_ep, u16 len,
 				index += len & ~0x03;
 			}
 			if (len & 0x02) {
-				musb_writew(fifo, 0, *(u16 *)&src[index]);
+				__raw_writew(*(u16 *)&src[index], fifo);
 				index += 2;
 			}
 		} else {
@@ -319,7 +324,7 @@ static void musb_default_write_fifo(struct musb_hw_ep *hw_ep, u16 len,
 			}
 		}
 		if (len & 0x01)
-			musb_writeb(fifo, 0, src[index]);
+			__raw_writeb(src[index], fifo);
 	} else  {
 		/* byte aligned */
 		iowrite8_rep(fifo, src, len);
@@ -351,7 +356,7 @@ static void musb_default_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 				index = len & ~0x03;
 			}
 			if (len & 0x02) {
-				*(u16 *)&dst[index] = musb_readw(fifo, 0);
+				*(u16 *)&dst[index] = __raw_readw(fifo);
 				index += 2;
 			}
 		} else {
@@ -361,7 +366,7 @@ static void musb_default_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 			}
 		}
 		if (len & 0x01)
-			dst[index] = musb_readb(fifo, 0);
+			dst[index] = __raw_readb(fifo);
 	} else  {
 		/* byte aligned */
 		ioread8_rep(fifo, dst, len);
@@ -389,6 +394,15 @@ EXPORT_SYMBOL_GPL(musb_readl);
 void (*musb_writel)(void __iomem *addr, unsigned offset, u32 data);
 EXPORT_SYMBOL_GPL(musb_writel);
 
+#ifndef CONFIG_MUSB_PIO_ONLY
+struct dma_controller *
+(*musb_dma_controller_create)(struct musb *musb, void __iomem *base);
+EXPORT_SYMBOL(musb_dma_controller_create);
+
+void (*musb_dma_controller_destroy)(struct dma_controller *c);
+EXPORT_SYMBOL(musb_dma_controller_destroy);
+#endif
+
 /*
  * New style IO functions
  */
@@ -1535,7 +1549,6 @@ static int musb_core_init(u16 musb_type, struct musb *musb)
 #endif
 
 		hw_ep->regs = musb->io.ep_offset(i, 0) + mbase;
-		hw_ep->target_regs = musb_read_target_reg_base(i, mbase);
 		hw_ep->rx_reinit = 1;
 		hw_ep->tx_reinit = 1;
 
@@ -1658,15 +1671,13 @@ void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
 	/* called with controller lock already held */
 
 	if (!epnum) {
-#ifndef CONFIG_USB_TUSB_OMAP_DMA
-		if (!is_cppi_enabled()) {
+		if (!is_cppi_enabled(musb)) {
 			/* endpoint 0 */
 			if (is_host_active(musb))
 				musb_h_ep0_irq(musb);
 			else
 				musb_g_ep0_irq(musb);
 		}
-#endif
 	} else {
 		/* endpoints 1..15 */
 		if (transmit) {
@@ -2021,13 +2032,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	if (musb->ops->quirks)
 		musb->io.quirks = musb->ops->quirks;
 
-	/* At least tusb6010 has it's own offsets.. */
-	if (musb->ops->ep_offset)
-		musb->io.ep_offset = musb->ops->ep_offset;
-	if (musb->ops->ep_select)
-		musb->io.ep_select = musb->ops->ep_select;
-
-	/* ..and some devices use indexed offset or flat offset */
+	/* Set default ep access to indexed offset or flat offset ops */
 	if (musb->io.quirks & MUSB_INDEXED_EP) {
 		musb->io.ep_offset = musb_indexed_ep_offset;
 		musb->io.ep_select = musb_indexed_ep_select;
@@ -2035,6 +2040,11 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 		musb->io.ep_offset = musb_flat_ep_offset;
 		musb->io.ep_select = musb_flat_ep_select;
 	}
+	/* And override them with platform specific ops if specified. */
+	if (musb->ops->ep_offset)
+		musb->io.ep_offset = musb->ops->ep_offset;
+	if (musb->ops->ep_select)
+		musb->io.ep_select = musb->ops->ep_select;
 
 	if (musb->ops->fifo_mode)
 		fifo_mode = musb->ops->fifo_mode;
@@ -2046,6 +2056,11 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	else
 		musb->io.fifo_offset = musb_default_fifo_offset;
 
+	if (musb->ops->busctl_offset)
+		musb->io.busctl_offset = musb->ops->busctl_offset;
+	else
+		musb->io.busctl_offset = musb_default_busctl_offset;
+
 	if (musb->ops->readb)
 		musb_readb = musb->ops->readb;
 	if (musb->ops->writeb)
@@ -2059,6 +2074,15 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	if (musb->ops->writel)
 		musb_writel = musb->ops->writel;
 
+#ifndef CONFIG_MUSB_PIO_ONLY
+	if (!musb->ops->dma_init || !musb->ops->dma_exit) {
+		dev_err(dev, "DMA controller not set\n");
+		goto fail2;
+	}
+	musb_dma_controller_create = musb->ops->dma_init;
+	musb_dma_controller_destroy = musb->ops->dma_exit;
+#endif
+
 	if (musb->ops->read_fifo)
 		musb->io.read_fifo = musb->ops->read_fifo;
 	else
@@ -2078,7 +2102,8 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	pm_runtime_get_sync(musb->controller);
 
 	if (use_dma && dev->dma_mask) {
-		musb->dma_controller = dma_controller_create(musb, musb->mregs);
+		musb->dma_controller =
+			musb_dma_controller_create(musb, musb->mregs);
 		if (IS_ERR(musb->dma_controller)) {
 			status = PTR_ERR(musb->dma_controller);
 			goto fail2_5;
@@ -2189,7 +2214,7 @@ fail3:
 	cancel_delayed_work_sync(&musb->finish_resume_work);
 	cancel_delayed_work_sync(&musb->deassert_reset_work);
 	if (musb->dma_controller)
-		dma_controller_destroy(musb->dma_controller);
+		musb_dma_controller_destroy(musb->dma_controller);
 fail2_5:
 	pm_runtime_put_sync(musb->controller);
 
@@ -2248,7 +2273,7 @@ static int musb_remove(struct platform_device *pdev)
 	musb_shutdown(pdev);
 
 	if (musb->dma_controller)
-		dma_controller_destroy(musb->dma_controller);
+		musb_dma_controller_destroy(musb->dma_controller);
 
 	cancel_work_sync(&musb->irq_work);
 	cancel_delayed_work_sync(&musb->finish_resume_work);
@@ -2316,18 +2341,18 @@ static void musb_save_context(struct musb *musb)
 			musb_readb(epio, MUSB_RXINTERVAL);
 
 		musb->context.index_regs[i].txfunaddr =
-			musb_read_txfunaddr(musb_base, i);
+			musb_read_txfunaddr(musb, i);
 		musb->context.index_regs[i].txhubaddr =
-			musb_read_txhubaddr(musb_base, i);
+			musb_read_txhubaddr(musb, i);
 		musb->context.index_regs[i].txhubport =
-			musb_read_txhubport(musb_base, i);
+			musb_read_txhubport(musb, i);
 
 		musb->context.index_regs[i].rxfunaddr =
-			musb_read_rxfunaddr(musb_base, i);
+			musb_read_rxfunaddr(musb, i);
 		musb->context.index_regs[i].rxhubaddr =
-			musb_read_rxhubaddr(musb_base, i);
+			musb_read_rxhubaddr(musb, i);
 		musb->context.index_regs[i].rxhubport =
-			musb_read_rxhubport(musb_base, i);
+			musb_read_rxhubport(musb, i);
 	}
 }
 
@@ -2335,7 +2360,6 @@ static void musb_restore_context(struct musb *musb)
 {
 	int i;
 	void __iomem *musb_base = musb->mregs;
-	void __iomem *ep_target_regs;
 	void __iomem *epio;
 	u8 power;
 
@@ -2396,21 +2420,18 @@ static void musb_restore_context(struct musb *musb)
 		musb_writeb(epio, MUSB_RXINTERVAL,
 
 				musb->context.index_regs[i].rxinterval);
-		musb_write_txfunaddr(musb_base, i,
+		musb_write_txfunaddr(musb, i,
 				musb->context.index_regs[i].txfunaddr);
-		musb_write_txhubaddr(musb_base, i,
+		musb_write_txhubaddr(musb, i,
 				musb->context.index_regs[i].txhubaddr);
-		musb_write_txhubport(musb_base, i,
+		musb_write_txhubport(musb, i,
 				musb->context.index_regs[i].txhubport);
 
-		ep_target_regs =
-			musb_read_target_reg_base(i, musb_base);
-
-		musb_write_rxfunaddr(ep_target_regs,
+		musb_write_rxfunaddr(musb, i,
 				musb->context.index_regs[i].rxfunaddr);
-		musb_write_rxhubaddr(ep_target_regs,
+		musb_write_rxhubaddr(musb, i,
 				musb->context.index_regs[i].rxhubaddr);
-		musb_write_rxhubport(ep_target_regs,
+		musb_write_rxhubport(musb, i,
 				musb->context.index_regs[i].rxhubport);
 	}
 	musb_writeb(musb_base, MUSB_INDEX, musb->context.index);
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 3877249..4b886d0 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -67,7 +67,6 @@ struct musb_ep;
 #include "musb_dma.h"
 
 #include "musb_io.h"
-#include "musb_regs.h"
 
 #include "musb_gadget.h"
 #include <linux/usb/hcd.h>
@@ -157,6 +156,8 @@ struct musb_io;
  * @writel:	write 32 bits
  * @read_fifo:	reads the fifo
  * @write_fifo:	writes to fifo
+ * @dma_init:	platform specific dma init function
+ * @dma_exit:	platform specific dma exit function
  * @init:	turns on clocks, sets up platform-specific registers, etc
  * @exit:	undoes @init
  * @set_mode:	forcefully changes operating mode
@@ -165,6 +166,8 @@ struct musb_io;
  * @vbus_status: returns vbus status if possible
  * @set_vbus:	forces vbus status
  * @adjust_channel_params: pre check for standard dma channel_program func
+ * @pre_root_reset_end: called before the root usb port reset flag gets cleared
+ * @post_root_reset_end: called after the root usb port reset flag gets cleared
  */
 struct musb_platform_ops {
 
@@ -187,6 +190,7 @@ struct musb_platform_ops {
 	void	(*ep_select)(void __iomem *mbase, u8 epnum);
 	u16	fifo_mode;
 	u32	(*fifo_offset)(u8 epnum);
+	u32	(*busctl_offset)(u8 epnum, u16 offset);
 	u8	(*readb)(const void __iomem *addr, unsigned offset);
 	void	(*writeb)(void __iomem *addr, unsigned offset, u8 data);
 	u16	(*readw)(const void __iomem *addr, unsigned offset);
@@ -195,6 +199,9 @@ struct musb_platform_ops {
 	void	(*writel)(void __iomem *addr, unsigned offset, u32 data);
 	void	(*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
 	void	(*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
+	struct dma_controller *
+		(*dma_init) (struct musb *musb, void __iomem *base);
+	void	(*dma_exit)(struct dma_controller *c);
 	int	(*set_mode)(struct musb *musb, u8 mode);
 	void	(*try_idle)(struct musb *musb, unsigned long timeout);
 	int	(*recover)(struct musb *musb);
@@ -205,6 +212,8 @@ struct musb_platform_ops {
 	int	(*adjust_channel_params)(struct dma_channel *channel,
 				u16 packet_sz, u8 *mode,
 				dma_addr_t *dma_addr, u32 *len);
+	void	(*pre_root_reset_end)(struct musb *musb);
+	void	(*post_root_reset_end)(struct musb *musb);
 };
 
 /*
@@ -241,8 +250,6 @@ struct musb_hw_ep {
 	void __iomem		*fifo_sync_va;
 #endif
 
-	void __iomem		*target_regs;
-
 	/* currently scheduled peripheral endpoint */
 	struct musb_qh		*in_qh;
 	struct musb_qh		*out_qh;
@@ -437,6 +444,9 @@ struct musb {
 #endif
 };
 
+/* This must be included after struct musb is defined */
+#include "musb_regs.h"
+
 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 {
 	return container_of(g, struct musb, g);
@@ -590,4 +600,16 @@ static inline int musb_platform_exit(struct musb *musb)
 	return musb->ops->exit(musb);
 }
 
+static inline void musb_platform_pre_root_reset_end(struct musb *musb)
+{
+	if (musb->ops->pre_root_reset_end)
+		musb->ops->pre_root_reset_end(musb);
+}
+
+static inline void musb_platform_post_root_reset_end(struct musb *musb)
+{
+	if (musb->ops->post_root_reset_end)
+		musb->ops->post_root_reset_end(musb);
+}
+
 #endif	/* __MUSB_CORE_H__ */
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 8bd8c5e..4d1b44c 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -678,7 +678,7 @@ err:
 	return ret;
 }
 
-void dma_controller_destroy(struct dma_controller *c)
+void cppi41_dma_controller_destroy(struct dma_controller *c)
 {
 	struct cppi41_dma_controller *controller = container_of(c,
 			struct cppi41_dma_controller, controller);
@@ -687,9 +687,10 @@ void dma_controller_destroy(struct dma_controller *c)
 	cppi41_dma_controller_stop(controller);
 	kfree(controller);
 }
+EXPORT_SYMBOL_GPL(cppi41_dma_controller_destroy);
 
-struct dma_controller *dma_controller_create(struct musb *musb,
-					void __iomem *base)
+struct dma_controller *
+cppi41_dma_controller_create(struct musb *musb, void __iomem *base)
 {
 	struct cppi41_dma_controller *controller;
 	int ret = 0;
@@ -726,3 +727,4 @@ kzalloc_fail:
 		return ERR_PTR(ret);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(cppi41_dma_controller_create);
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 78a283e..9b22d94 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -191,9 +191,16 @@ static ssize_t musb_test_mode_write(struct file *file,
 {
 	struct seq_file		*s = file->private_data;
 	struct musb		*musb = s->private;
-	u8			test = 0;
+	u8			test;
 	char			buf[18];
 
+	test = musb_readb(musb->mregs, MUSB_TESTMODE);
+	if (test) {
+		dev_err(musb->controller, "Error: test mode is already set. "
+			"Please do USB Bus Reset to start a new test.\n");
+		return count;
+	}
+
 	memset(buf, 0x00, sizeof(buf));
 
 	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
@@ -238,6 +245,90 @@ static const struct file_operations musb_test_mode_fops = {
 	.release		= single_release,
 };
 
+static int musb_softconnect_show(struct seq_file *s, void *unused)
+{
+	struct musb	*musb = s->private;
+	u8		reg;
+	int		connect;
+
+	switch (musb->xceiv->otg->state) {
+	case OTG_STATE_A_HOST:
+	case OTG_STATE_A_WAIT_BCON:
+		reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+		connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;
+		break;
+	default:
+		connect = -1;
+	}
+
+	seq_printf(s, "%d\n", connect);
+
+	return 0;
+}
+
+static int musb_softconnect_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, musb_softconnect_show, inode->i_private);
+}
+
+static ssize_t musb_softconnect_write(struct file *file,
+		const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	struct seq_file		*s = file->private_data;
+	struct musb		*musb = s->private;
+	char			buf[2];
+	u8			reg;
+
+	memset(buf, 0x00, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (!strncmp(buf, "0", 1)) {
+		switch (musb->xceiv->otg->state) {
+		case OTG_STATE_A_HOST:
+			musb_root_disconnect(musb);
+			reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+			reg &= ~MUSB_DEVCTL_SESSION;
+			musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
+			break;
+		default:
+			break;
+		}
+	} else if (!strncmp(buf, "1", 1)) {
+		switch (musb->xceiv->otg->state) {
+		case OTG_STATE_A_WAIT_BCON:
+			/*
+			 * musb_save_context() called in musb_runtime_suspend()
+			 * might cache devctl with SESSION bit cleared during
+			 * soft-disconnect, so specifically set SESSION bit
+			 * here to preserve it for musb_runtime_resume().
+			 */
+			musb->context.devctl |= MUSB_DEVCTL_SESSION;
+			reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+			reg |= MUSB_DEVCTL_SESSION;
+			musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
+			break;
+		default:
+			break;
+		}
+	}
+
+	return count;
+}
+
+/*
+ * In host mode, connect/disconnect the bus without physically
+ * remove the devices.
+ */
+static const struct file_operations musb_softconnect_fops = {
+	.open			= musb_softconnect_open,
+	.write			= musb_softconnect_write,
+	.read			= seq_read,
+	.llseek			= seq_lseek,
+	.release		= single_release,
+};
+
 int musb_init_debugfs(struct musb *musb)
 {
 	struct dentry		*root;
@@ -264,6 +355,13 @@ int musb_init_debugfs(struct musb *musb)
 		goto err1;
 	}
 
+	file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR,
+			root, musb, &musb_softconnect_fops);
+	if (!file) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
 	musb->debugfs_root = root;
 
 	return 0;
diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h
index 1d44faa..46357e1 100644
--- a/drivers/usb/musb/musb_dma.h
+++ b/drivers/usb/musb/musb_dma.h
@@ -68,16 +68,41 @@ struct musb_hw_ep;
 #define	is_dma_capable()	(1)
 #endif
 
-#if defined(CONFIG_USB_TI_CPPI_DMA) || defined(CONFIG_USB_TI_CPPI41_DMA)
-#define	is_cppi_enabled()	1
+#ifdef CONFIG_USB_UX500_DMA
+#define musb_dma_ux500(musb)		(musb->io.quirks & MUSB_DMA_UX500)
+#else
+#define musb_dma_ux500(musb)		0
+#endif
+
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+#define musb_dma_cppi41(musb)		(musb->io.quirks & MUSB_DMA_CPPI41)
+#else
+#define musb_dma_cppi41(musb)		0
+#endif
+
+#ifdef CONFIG_USB_TI_CPPI_DMA
+#define musb_dma_cppi(musb)		(musb->io.quirks & MUSB_DMA_CPPI)
 #else
-#define	is_cppi_enabled()	0
+#define musb_dma_cppi(musb)		0
 #endif
 
 #ifdef CONFIG_USB_TUSB_OMAP_DMA
-#define tusb_dma_omap()			1
+#define tusb_dma_omap(musb)		(musb->io.quirks & MUSB_DMA_TUSB_OMAP)
+#else
+#define tusb_dma_omap(musb)		0
+#endif
+
+#ifdef CONFIG_USB_INVENTRA_DMA
+#define musb_dma_inventra(musb)		(musb->io.quirks & MUSB_DMA_INVENTRA)
 #else
-#define tusb_dma_omap()			0
+#define musb_dma_inventra(musb)		0
+#endif
+
+#if defined(CONFIG_USB_TI_CPPI_DMA) || defined(CONFIG_USB_TI_CPPI41_DMA)
+#define	is_cppi_enabled(musb)		\
+	(musb_dma_cppi(musb) || musb_dma_cppi41(musb))
+#else
+#define	is_cppi_enabled(musb)	0
 #endif
 
 /* Anomaly 05000456 - USB Receive Interrupt Is Not Generated in DMA Mode 1
@@ -177,19 +202,41 @@ struct dma_controller {
 extern void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit);
 
 #ifdef CONFIG_MUSB_PIO_ONLY
-static inline struct dma_controller *dma_controller_create(struct musb *m,
-		void __iomem *io)
+static inline struct dma_controller *
+musb_dma_controller_create(struct musb *m, void __iomem *io)
 {
 	return NULL;
 }
 
-static inline void dma_controller_destroy(struct dma_controller *d) { }
+static inline void musb_dma_controller_destroy(struct dma_controller *d) { }
 
 #else
 
-extern struct dma_controller *dma_controller_create(struct musb *, void __iomem *);
+extern struct dma_controller *
+(*musb_dma_controller_create)(struct musb *, void __iomem *);
 
-extern void dma_controller_destroy(struct dma_controller *);
+extern void (*musb_dma_controller_destroy)(struct dma_controller *);
 #endif
 
+/* Platform specific DMA functions */
+extern struct dma_controller *
+musbhs_dma_controller_create(struct musb *musb, void __iomem *base);
+extern void musbhs_dma_controller_destroy(struct dma_controller *c);
+
+extern struct dma_controller *
+tusb_dma_controller_create(struct musb *musb, void __iomem *base);
+extern void tusb_dma_controller_destroy(struct dma_controller *c);
+
+extern struct dma_controller *
+cppi_dma_controller_create(struct musb *musb, void __iomem *base);
+extern void cppi_dma_controller_destroy(struct dma_controller *c);
+
+extern struct dma_controller *
+cppi41_dma_controller_create(struct musb *musb, void __iomem *base);
+extern void cppi41_dma_controller_destroy(struct dma_controller *c);
+
+extern struct dma_controller *
+ux500_dma_controller_create(struct musb *musb, void __iomem *base);
+extern void ux500_dma_controller_destroy(struct dma_controller *c);
+
 #endif	/* __MUSB_DMA_H__ */
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 65d931a..1334a3d 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -634,10 +634,14 @@ static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 }
 
 static struct musb_platform_ops dsps_ops = {
-	.quirks		= MUSB_INDEXED_EP,
+	.quirks		= MUSB_DMA_CPPI41 | MUSB_INDEXED_EP,
 	.init		= dsps_musb_init,
 	.exit		= dsps_musb_exit,
 
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+	.dma_init	= cppi41_dma_controller_create,
+	.dma_exit	= cppi41_dma_controller_destroy,
+#endif
 	.enable		= dsps_musb_enable,
 	.disable	= dsps_musb_disable,
 
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 4c481cd..625d482f 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -366,7 +366,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
 		}
 
 #endif
-		if (is_cppi_enabled()) {
+		if (is_cppi_enabled(musb)) {
 			/* program endpoint CSR first, then setup DMA */
 			csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY);
 			csr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE |
@@ -402,7 +402,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
 				musb_writew(epio, MUSB_TXCSR, csr);
 				/* invariant: prequest->buf is non-null */
 			}
-		} else if (tusb_dma_omap())
+		} else if (tusb_dma_omap(musb))
 			use_dma = use_dma && c->channel_program(
 					musb_ep->dma, musb_ep->packet_sz,
 					request->zero,
@@ -489,6 +489,7 @@ void musb_g_tx(struct musb *musb, u8 epnum)
 
 	if (request) {
 		u8	is_dma = 0;
+		bool	short_packet = false;
 
 		if (dma && (csr & MUSB_TXCSR_DMAENAB)) {
 			is_dma = 1;
@@ -507,15 +508,18 @@ void musb_g_tx(struct musb *musb, u8 epnum)
 		 * First, maybe a terminating short packet. Some DMA
 		 * engines might handle this by themselves.
 		 */
-		if ((request->zero && request->length
+		if ((request->zero && request->length)
 			&& (request->length % musb_ep->packet_sz == 0)
 			&& (request->actual == request->length))
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
-			|| (is_dma && (!dma->desired_mode ||
+				short_packet = true;
+
+		if ((musb_dma_inventra(musb) || musb_dma_ux500(musb)) &&
+			(is_dma && (!dma->desired_mode ||
 				(request->actual &
-					(musb_ep->packet_sz - 1))))
-#endif
-		) {
+					(musb_ep->packet_sz - 1)))))
+				short_packet = true;
+
+		if (short_packet) {
 			/*
 			 * On DMA completion, FIFO may not be
 			 * available yet...
@@ -595,7 +599,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
 		return;
 	}
 
-	if (is_cppi_enabled() && is_buffer_mapped(req)) {
+	if (is_cppi_enabled(musb) && is_buffer_mapped(req)) {
 		struct dma_controller	*c = musb->dma_controller;
 		struct dma_channel	*channel = musb_ep->dma;
 
@@ -772,7 +776,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
 			fifo_count = min_t(unsigned, len, fifo_count);
 
 #ifdef	CONFIG_USB_TUSB_OMAP_DMA
-			if (tusb_dma_omap() && is_buffer_mapped(req)) {
+			if (tusb_dma_omap(musb) && is_buffer_mapped(req)) {
 				struct dma_controller *c = musb->dma_controller;
 				struct dma_channel *channel = musb_ep->dma;
 				u32 dma_addr = request->dma + request->actual;
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index e1fb5d8..26c65e6 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -181,7 +181,7 @@ static inline void musb_h_tx_dma_start(struct musb_hw_ep *ep)
 	/* NOTE: no locks here; caller should lock and select EP */
 	txcsr = musb_readw(ep->regs, MUSB_TXCSR);
 	txcsr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_H_WZC_BITS;
-	if (is_cppi_enabled())
+	if (is_cppi_enabled(ep->musb))
 		txcsr |= MUSB_TXCSR_DMAMODE;
 	musb_writew(ep->regs, MUSB_TXCSR, txcsr);
 }
@@ -294,7 +294,7 @@ start:
 
 		if (!hw_ep->tx_channel)
 			musb_h_tx_start(hw_ep);
-		else if (is_cppi_enabled() || tusb_dma_omap())
+		else if (is_cppi_enabled(musb) || tusb_dma_omap(musb))
 			musb_h_tx_dma_start(hw_ep);
 	}
 }
@@ -555,8 +555,9 @@ musb_host_packet_rx(struct musb *musb, struct urb *urb, u8 epnum, u8 iso_err)
  * the busy/not-empty tests are basically paranoia.
  */
 static void
-musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep)
+musb_rx_reinit(struct musb *musb, struct musb_qh *qh, u8 epnum)
 {
+	struct musb_hw_ep *ep = musb->endpoints + epnum;
 	u16	csr;
 
 	/* NOTE:  we know the "rx" fifo reinit never triggers for ep0.
@@ -594,10 +595,9 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep)
 
 	/* target addr and (for multipoint) hub addr/port */
 	if (musb->is_multipoint) {
-		musb_write_rxfunaddr(ep->target_regs, qh->addr_reg);
-		musb_write_rxhubaddr(ep->target_regs, qh->h_addr_reg);
-		musb_write_rxhubport(ep->target_regs, qh->h_port_reg);
-
+		musb_write_rxfunaddr(musb, epnum, qh->addr_reg);
+		musb_write_rxhubaddr(musb, epnum, qh->h_addr_reg);
+		musb_write_rxhubport(musb, epnum, qh->h_port_reg);
 	} else
 		musb_writeb(musb->mregs, MUSB_FADDR, qh->addr_reg);
 
@@ -617,23 +617,22 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep)
 	ep->rx_reinit = 0;
 }
 
-static bool musb_tx_dma_program(struct dma_controller *dma,
+static int musb_tx_dma_set_mode_mentor(struct dma_controller *dma,
 		struct musb_hw_ep *hw_ep, struct musb_qh *qh,
-		struct urb *urb, u32 offset, u32 length)
+		struct urb *urb, u32 offset,
+		u32 *length, u8 *mode)
 {
 	struct dma_channel	*channel = hw_ep->tx_channel;
 	void __iomem		*epio = hw_ep->regs;
 	u16			pkt_size = qh->maxpacket;
 	u16			csr;
-	u8			mode;
 
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
-	if (length > channel->max_len)
-		length = channel->max_len;
+	if (*length > channel->max_len)
+		*length = channel->max_len;
 
 	csr = musb_readw(epio, MUSB_TXCSR);
-	if (length > pkt_size) {
-		mode = 1;
+	if (*length > pkt_size) {
+		*mode = 1;
 		csr |= MUSB_TXCSR_DMAMODE | MUSB_TXCSR_DMAENAB;
 		/* autoset shouldn't be set in high bandwidth */
 		/*
@@ -649,15 +648,28 @@ static bool musb_tx_dma_program(struct dma_controller *dma,
 					can_bulk_split(hw_ep->musb, qh->type)))
 			csr |= MUSB_TXCSR_AUTOSET;
 	} else {
-		mode = 0;
+		*mode = 0;
 		csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAMODE);
 		csr |= MUSB_TXCSR_DMAENAB; /* against programmer's guide */
 	}
 	channel->desired_mode = mode;
 	musb_writew(epio, MUSB_TXCSR, csr);
-#else
-	if (!is_cppi_enabled() && !tusb_dma_omap())
-		return false;
+
+	return 0;
+}
+
+static int musb_tx_dma_set_mode_cppi_tusb(struct dma_controller *dma,
+					  struct musb_hw_ep *hw_ep,
+					  struct musb_qh *qh,
+					  struct urb *urb,
+					  u32 offset,
+					  u32 *length,
+					  u8 *mode)
+{
+	struct dma_channel *channel = hw_ep->tx_channel;
+
+	if (!is_cppi_enabled(hw_ep->musb) && !tusb_dma_omap(hw_ep->musb))
+		return -ENODEV;
 
 	channel->actual_len = 0;
 
@@ -665,8 +677,28 @@ static bool musb_tx_dma_program(struct dma_controller *dma,
 	 * TX uses "RNDIS" mode automatically but needs help
 	 * to identify the zero-length-final-packet case.
 	 */
-	mode = (urb->transfer_flags & URB_ZERO_PACKET) ? 1 : 0;
-#endif
+	*mode = (urb->transfer_flags & URB_ZERO_PACKET) ? 1 : 0;
+
+	return 0;
+}
+
+static bool musb_tx_dma_program(struct dma_controller *dma,
+		struct musb_hw_ep *hw_ep, struct musb_qh *qh,
+		struct urb *urb, u32 offset, u32 length)
+{
+	struct dma_channel	*channel = hw_ep->tx_channel;
+	u16			pkt_size = qh->maxpacket;
+	u8			mode;
+	int			res;
+
+	if (musb_dma_inventra(hw_ep->musb) || musb_dma_ux500(hw_ep->musb))
+		res = musb_tx_dma_set_mode_mentor(dma, hw_ep, qh, urb,
+						 offset, &length, &mode);
+	else
+		res = musb_tx_dma_set_mode_cppi_tusb(dma, hw_ep, qh, urb,
+						     offset, &length, &mode);
+	if (res)
+		return false;
 
 	qh->segsize = length;
 
@@ -678,6 +710,9 @@ static bool musb_tx_dma_program(struct dma_controller *dma,
 
 	if (!dma->channel_program(channel, pkt_size, mode,
 			urb->transfer_dma + offset, length)) {
+		void __iomem *epio = hw_ep->regs;
+		u16 csr;
+
 		dma->channel_release(channel);
 		hw_ep->tx_channel = NULL;
 
@@ -801,9 +836,9 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
 
 		/* target addr and (for multipoint) hub addr/port */
 		if (musb->is_multipoint) {
-			musb_write_txfunaddr(mbase, epnum, qh->addr_reg);
-			musb_write_txhubaddr(mbase, epnum, qh->h_addr_reg);
-			musb_write_txhubport(mbase, epnum, qh->h_port_reg);
+			musb_write_txfunaddr(musb, epnum, qh->addr_reg);
+			musb_write_txhubaddr(musb, epnum, qh->h_addr_reg);
+			musb_write_txhubport(musb, epnum, qh->h_port_reg);
 /* FIXME if !epnum, do the same for RX ... */
 		} else
 			musb_writeb(mbase, MUSB_FADDR, qh->addr_reg);
@@ -875,7 +910,7 @@ finish:
 		u16	csr;
 
 		if (hw_ep->rx_reinit) {
-			musb_rx_reinit(musb, qh, hw_ep);
+			musb_rx_reinit(musb, qh, epnum);
 
 			/* init new state: toggle and NYET, maybe DMA later */
 			if (usb_gettoggle(urb->dev, qh->epnum, 0))
@@ -901,7 +936,7 @@ finish:
 
 		/* kick things off */
 
-		if ((is_cppi_enabled() || tusb_dma_omap()) && dma_channel) {
+		if ((is_cppi_enabled(musb) || tusb_dma_omap(musb)) && dma_channel) {
 			/* Candidate for DMA */
 			dma_channel->actual_len = 0L;
 			qh->segsize = len;
@@ -1441,7 +1476,7 @@ done:
 	} else if ((usb_pipeisoc(pipe) || transfer_pending) && dma) {
 		if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
 				offset, length)) {
-			if (is_cppi_enabled() || tusb_dma_omap())
+			if (is_cppi_enabled(musb) || tusb_dma_omap(musb))
 				musb_h_tx_dma_start(hw_ep);
 			return;
 		}
@@ -1498,9 +1533,47 @@ done:
 			MUSB_TXCSR_H_WZC_BITS | MUSB_TXCSR_TXPKTRDY);
 }
 
+#ifdef CONFIG_USB_TI_CPPI41_DMA
+/* Seems to set up ISO for cppi41 and not advance len. See commit c57c41d */
+static int musb_rx_dma_iso_cppi41(struct dma_controller *dma,
+				  struct musb_hw_ep *hw_ep,
+				  struct musb_qh *qh,
+				  struct urb *urb,
+				  size_t len)
+{
+	struct dma_channel *channel = hw_ep->tx_channel;
+	void __iomem *epio = hw_ep->regs;
+	dma_addr_t *buf;
+	u32 length, res;
+	u16 val;
 
-#ifdef CONFIG_USB_INVENTRA_DMA
+	buf = (void *)urb->iso_frame_desc[qh->iso_idx].offset +
+		(u32)urb->transfer_dma;
+
+	length = urb->iso_frame_desc[qh->iso_idx].length;
+
+	val = musb_readw(epio, MUSB_RXCSR);
+	val |= MUSB_RXCSR_DMAENAB;
+	musb_writew(hw_ep->regs, MUSB_RXCSR, val);
+
+	res = dma->channel_program(channel, qh->maxpacket, 0,
+				   (u32)buf, length);
+
+	return res;
+}
+#else
+static inline int musb_rx_dma_iso_cppi41(struct dma_controller *dma,
+					 struct musb_hw_ep *hw_ep,
+					 struct musb_qh *qh,
+					 struct urb *urb,
+					 size_t len)
+{
+	return false;
+}
+#endif
 
+#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
+	defined(CONFIG_USB_TI_CPPI41_DMA)
 /* Host side RX (IN) using Mentor DMA works as follows:
 	submit_urb ->
 		- if queue was empty, ProgramEndpoint
@@ -1535,7 +1608,194 @@ done:
  *	thus be a great candidate for using mode 1 ... for all but the
  *	last packet of one URB's transfer.
  */
+static int musb_rx_dma_inventra_cppi41(struct dma_controller *dma,
+				       struct musb_hw_ep *hw_ep,
+				       struct musb_qh *qh,
+				       struct urb *urb,
+				       size_t len)
+{
+	struct dma_channel *channel = hw_ep->rx_channel;
+	void __iomem *epio = hw_ep->regs;
+	u16 val;
+	int pipe;
+	bool done;
+
+	pipe = urb->pipe;
+
+	if (usb_pipeisoc(pipe)) {
+		struct usb_iso_packet_descriptor *d;
+
+		d = urb->iso_frame_desc + qh->iso_idx;
+		d->actual_length = len;
+
+		/* even if there was an error, we did the dma
+		 * for iso_frame_desc->length
+		 */
+		if (d->status != -EILSEQ && d->status != -EOVERFLOW)
+			d->status = 0;
+
+		if (++qh->iso_idx >= urb->number_of_packets) {
+			done = true;
+		} else {
+			/* REVISIT: Why ignore return value here? */
+			if (musb_dma_cppi41(hw_ep->musb))
+				done = musb_rx_dma_iso_cppi41(dma, hw_ep, qh,
+							      urb, len);
+			done = false;
+		}
+
+	} else  {
+		/* done if urb buffer is full or short packet is recd */
+		done = (urb->actual_length + len >=
+			urb->transfer_buffer_length
+			|| channel->actual_len < qh->maxpacket
+			|| channel->rx_packet_done);
+	}
+
+	/* send IN token for next packet, without AUTOREQ */
+	if (!done) {
+		val = musb_readw(epio, MUSB_RXCSR);
+		val |= MUSB_RXCSR_H_REQPKT;
+		musb_writew(epio, MUSB_RXCSR, MUSB_RXCSR_H_WZC_BITS | val);
+	}
+
+	return done;
+}
+
+/* Disadvantage of using mode 1:
+ *	It's basically usable only for mass storage class; essentially all
+ *	other protocols also terminate transfers on short packets.
+ *
+ * Details:
+ *	An extra IN token is sent at the end of the transfer (due to AUTOREQ)
+ *	If you try to use mode 1 for (transfer_buffer_length - 512), and try
+ *	to use the extra IN token to grab the last packet using mode 0, then
+ *	the problem is that you cannot be sure when the device will send the
+ *	last packet and RxPktRdy set. Sometimes the packet is recd too soon
+ *	such that it gets lost when RxCSR is re-set at the end of the mode 1
+ *	transfer, while sometimes it is recd just a little late so that if you
+ *	try to configure for mode 0 soon after the mode 1 transfer is
+ *	completed, you will find rxcount 0. Okay, so you might think why not
+ *	wait for an interrupt when the pkt is recd. Well, you won't get any!
+ */
+static int musb_rx_dma_in_inventra_cppi41(struct dma_controller *dma,
+					  struct musb_hw_ep *hw_ep,
+					  struct musb_qh *qh,
+					  struct urb *urb,
+					  size_t len,
+					  u8 iso_err)
+{
+	struct musb *musb = hw_ep->musb;
+	void __iomem *epio = hw_ep->regs;
+	struct dma_channel *channel = hw_ep->rx_channel;
+	u16 rx_count, val;
+	int length, pipe, done;
+	dma_addr_t buf;
+
+	rx_count = musb_readw(epio, MUSB_RXCOUNT);
+	pipe = urb->pipe;
+
+	if (usb_pipeisoc(pipe)) {
+		int d_status = 0;
+		struct usb_iso_packet_descriptor *d;
+
+		d = urb->iso_frame_desc + qh->iso_idx;
+
+		if (iso_err) {
+			d_status = -EILSEQ;
+			urb->error_count++;
+		}
+		if (rx_count > d->length) {
+			if (d_status == 0) {
+				d_status = -EOVERFLOW;
+				urb->error_count++;
+			}
+			dev_dbg(musb->controller, "** OVERFLOW %d into %d\n",
+				rx_count, d->length);
+
+			length = d->length;
+		} else
+			length = rx_count;
+		d->status = d_status;
+		buf = urb->transfer_dma + d->offset;
+	} else {
+		length = rx_count;
+		buf = urb->transfer_dma + urb->actual_length;
+	}
 
+	channel->desired_mode = 0;
+#ifdef USE_MODE1
+	/* because of the issue below, mode 1 will
+	 * only rarely behave with correct semantics.
+	 */
+	if ((urb->transfer_flags & URB_SHORT_NOT_OK)
+	    && (urb->transfer_buffer_length - urb->actual_length)
+	    > qh->maxpacket)
+		channel->desired_mode = 1;
+	if (rx_count < hw_ep->max_packet_sz_rx) {
+		length = rx_count;
+		channel->desired_mode = 0;
+	} else {
+		length = urb->transfer_buffer_length;
+	}
+#endif
+
+	/* See comments above on disadvantages of using mode 1 */
+	val = musb_readw(epio, MUSB_RXCSR);
+	val &= ~MUSB_RXCSR_H_REQPKT;
+
+	if (channel->desired_mode == 0)
+		val &= ~MUSB_RXCSR_H_AUTOREQ;
+	else
+		val |= MUSB_RXCSR_H_AUTOREQ;
+	val |= MUSB_RXCSR_DMAENAB;
+
+	/* autoclear shouldn't be set in high bandwidth */
+	if (qh->hb_mult == 1)
+		val |= MUSB_RXCSR_AUTOCLEAR;
+
+	musb_writew(epio, MUSB_RXCSR, MUSB_RXCSR_H_WZC_BITS | val);
+
+	/* REVISIT if when actual_length != 0,
+	 * transfer_buffer_length needs to be
+	 * adjusted first...
+	 */
+	done = dma->channel_program(channel, qh->maxpacket,
+				   channel->desired_mode,
+				   buf, length);
+
+	if (!done) {
+		dma->channel_release(channel);
+		hw_ep->rx_channel = NULL;
+		channel = NULL;
+		val = musb_readw(epio, MUSB_RXCSR);
+		val &= ~(MUSB_RXCSR_DMAENAB
+			 | MUSB_RXCSR_H_AUTOREQ
+			 | MUSB_RXCSR_AUTOCLEAR);
+		musb_writew(epio, MUSB_RXCSR, val);
+	}
+
+	return done;
+}
+#else
+static inline int musb_rx_dma_inventra_cppi41(struct dma_controller *dma,
+					      struct musb_hw_ep *hw_ep,
+					      struct musb_qh *qh,
+					      struct urb *urb,
+					      size_t len)
+{
+	return false;
+}
+
+static inline int musb_rx_dma_in_inventra_cppi41(struct dma_controller *dma,
+						 struct musb_hw_ep *hw_ep,
+						 struct musb_qh *qh,
+						 struct urb *urb,
+						 size_t len,
+						 u8 iso_err)
+{
+	return false;
+}
 #endif
 
 /*
@@ -1546,6 +1806,7 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 {
 	struct urb		*urb;
 	struct musb_hw_ep	*hw_ep = musb->endpoints + epnum;
+	struct dma_controller	*c = musb->dma_controller;
 	void __iomem		*epio = hw_ep->regs;
 	struct musb_qh		*qh = hw_ep->in_qh;
 	size_t			xfer_len;
@@ -1661,9 +1922,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 	 */
 
 	/* FIXME this is _way_ too much in-line logic for Mentor DMA */
-
-#if !defined(CONFIG_USB_INVENTRA_DMA) && !defined(CONFIG_USB_UX500_DMA)
-	if (rx_csr & MUSB_RXCSR_H_REQPKT)  {
+	if (!musb_dma_inventra(musb) && !musb_dma_ux500(musb) &&
+	    (rx_csr & MUSB_RXCSR_H_REQPKT)) {
 		/* REVISIT this happened for a while on some short reads...
 		 * the cleanup still needs investigation... looks bad...
 		 * and also duplicates dma cleanup code above ... plus,
@@ -1684,7 +1944,7 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 		musb_writew(epio, MUSB_RXCSR,
 				MUSB_RXCSR_H_WZC_BITS | rx_csr);
 	}
-#endif
+
 	if (dma && (rx_csr & MUSB_RXCSR_DMAENAB)) {
 		xfer_len = dma->actual_len;
 
@@ -1694,67 +1954,18 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 			| MUSB_RXCSR_RXPKTRDY);
 		musb_writew(hw_ep->regs, MUSB_RXCSR, val);
 
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
-	defined(CONFIG_USB_TI_CPPI41_DMA)
-		if (usb_pipeisoc(pipe)) {
-			struct usb_iso_packet_descriptor *d;
-
-			d = urb->iso_frame_desc + qh->iso_idx;
-			d->actual_length = xfer_len;
-
-			/* even if there was an error, we did the dma
-			 * for iso_frame_desc->length
-			 */
-			if (d->status != -EILSEQ && d->status != -EOVERFLOW)
-				d->status = 0;
-
-			if (++qh->iso_idx >= urb->number_of_packets) {
-				done = true;
-			} else {
-#if defined(CONFIG_USB_TI_CPPI41_DMA)
-				struct dma_controller   *c;
-				dma_addr_t *buf;
-				u32 length, ret;
-
-				c = musb->dma_controller;
-				buf = (void *)
-					urb->iso_frame_desc[qh->iso_idx].offset
-					+ (u32)urb->transfer_dma;
-
-				length =
-					urb->iso_frame_desc[qh->iso_idx].length;
-
-				val |= MUSB_RXCSR_DMAENAB;
-				musb_writew(hw_ep->regs, MUSB_RXCSR, val);
-
-				ret = c->channel_program(dma, qh->maxpacket,
-						0, (u32) buf, length);
-#endif
-				done = false;
-			}
-
-		} else  {
-			/* done if urb buffer is full or short packet is recd */
-			done = (urb->actual_length + xfer_len >=
-					urb->transfer_buffer_length
-				|| dma->actual_len < qh->maxpacket
-				|| dma->rx_packet_done);
-		}
-
-		/* send IN token for next packet, without AUTOREQ */
-		if (!done) {
-			val |= MUSB_RXCSR_H_REQPKT;
-			musb_writew(epio, MUSB_RXCSR,
-				MUSB_RXCSR_H_WZC_BITS | val);
+		if (musb_dma_inventra(musb) || musb_dma_ux500(musb) ||
+		    musb_dma_cppi41(musb)) {
+			    done = musb_rx_dma_inventra_cppi41(c, hw_ep, qh, urb, xfer_len);
+			    dev_dbg(hw_ep->musb->controller,
+				    "ep %d dma %s, rxcsr %04x, rxcount %d\n",
+				    epnum, done ? "off" : "reset",
+				    musb_readw(epio, MUSB_RXCSR),
+				    musb_readw(epio, MUSB_RXCOUNT));
+		} else {
+			done = true;
 		}
 
-		dev_dbg(musb->controller, "ep %d dma %s, rxcsr %04x, rxcount %d\n", epnum,
-			done ? "off" : "reset",
-			musb_readw(epio, MUSB_RXCSR),
-			musb_readw(epio, MUSB_RXCOUNT));
-#else
-		done = true;
-#endif
 	} else if (urb->status == -EINPROGRESS) {
 		/* if no errors, be sure a packet is ready for unloading */
 		if (unlikely(!(rx_csr & MUSB_RXCSR_RXPKTRDY))) {
@@ -1772,126 +1983,24 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 		}
 
 		/* we are expecting IN packets */
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
-	defined(CONFIG_USB_TI_CPPI41_DMA)
-		if (dma) {
-			struct dma_controller	*c;
-			u16			rx_count;
-			int			ret, length;
-			dma_addr_t		buf;
-
-			rx_count = musb_readw(epio, MUSB_RXCOUNT);
-
-			dev_dbg(musb->controller, "RX%d count %d, buffer 0x%llx len %d/%d\n",
-					epnum, rx_count,
-					(unsigned long long) urb->transfer_dma
-					+ urb->actual_length,
-					qh->offset,
-					urb->transfer_buffer_length);
-
-			c = musb->dma_controller;
-
-			if (usb_pipeisoc(pipe)) {
-				int d_status = 0;
-				struct usb_iso_packet_descriptor *d;
-
-				d = urb->iso_frame_desc + qh->iso_idx;
-
-				if (iso_err) {
-					d_status = -EILSEQ;
-					urb->error_count++;
-				}
-				if (rx_count > d->length) {
-					if (d_status == 0) {
-						d_status = -EOVERFLOW;
-						urb->error_count++;
-					}
-					dev_dbg(musb->controller, "** OVERFLOW %d into %d\n",\
-					    rx_count, d->length);
-
-					length = d->length;
-				} else
-					length = rx_count;
-				d->status = d_status;
-				buf = urb->transfer_dma + d->offset;
-			} else {
-				length = rx_count;
-				buf = urb->transfer_dma +
-						urb->actual_length;
-			}
-
-			dma->desired_mode = 0;
-#ifdef USE_MODE1
-			/* because of the issue below, mode 1 will
-			 * only rarely behave with correct semantics.
-			 */
-			if ((urb->transfer_flags &
-						URB_SHORT_NOT_OK)
-				&& (urb->transfer_buffer_length -
-						urb->actual_length)
-					> qh->maxpacket)
-				dma->desired_mode = 1;
-			if (rx_count < hw_ep->max_packet_sz_rx) {
-				length = rx_count;
-				dma->desired_mode = 0;
-			} else {
-				length = urb->transfer_buffer_length;
-			}
-#endif
-
-/* Disadvantage of using mode 1:
- *	It's basically usable only for mass storage class; essentially all
- *	other protocols also terminate transfers on short packets.
- *
- * Details:
- *	An extra IN token is sent at the end of the transfer (due to AUTOREQ)
- *	If you try to use mode 1 for (transfer_buffer_length - 512), and try
- *	to use the extra IN token to grab the last packet using mode 0, then
- *	the problem is that you cannot be sure when the device will send the
- *	last packet and RxPktRdy set. Sometimes the packet is recd too soon
- *	such that it gets lost when RxCSR is re-set at the end of the mode 1
- *	transfer, while sometimes it is recd just a little late so that if you
- *	try to configure for mode 0 soon after the mode 1 transfer is
- *	completed, you will find rxcount 0. Okay, so you might think why not
- *	wait for an interrupt when the pkt is recd. Well, you won't get any!
- */
-
-			val = musb_readw(epio, MUSB_RXCSR);
-			val &= ~MUSB_RXCSR_H_REQPKT;
-
-			if (dma->desired_mode == 0)
-				val &= ~MUSB_RXCSR_H_AUTOREQ;
+		if ((musb_dma_inventra(musb) || musb_dma_ux500(musb) ||
+		    musb_dma_cppi41(musb)) && dma) {
+			dev_dbg(hw_ep->musb->controller,
+				"RX%d count %d, buffer 0x%llx len %d/%d\n",
+				epnum, musb_readw(epio, MUSB_RXCOUNT),
+				(unsigned long long) urb->transfer_dma
+				+ urb->actual_length,
+				qh->offset,
+				urb->transfer_buffer_length);
+
+			done = musb_rx_dma_in_inventra_cppi41(c, hw_ep, qh,
+							      urb, xfer_len,
+							      iso_err);
+			if (done)
+				goto finish;
 			else
-				val |= MUSB_RXCSR_H_AUTOREQ;
-			val |= MUSB_RXCSR_DMAENAB;
-
-			/* autoclear shouldn't be set in high bandwidth */
-			if (qh->hb_mult == 1)
-				val |= MUSB_RXCSR_AUTOCLEAR;
-
-			musb_writew(epio, MUSB_RXCSR,
-				MUSB_RXCSR_H_WZC_BITS | val);
-
-			/* REVISIT if when actual_length != 0,
-			 * transfer_buffer_length needs to be
-			 * adjusted first...
-			 */
-			ret = c->channel_program(
-				dma, qh->maxpacket,
-				dma->desired_mode, buf, length);
-
-			if (!ret) {
-				c->channel_release(dma);
-				hw_ep->rx_channel = NULL;
-				dma = NULL;
-				val = musb_readw(epio, MUSB_RXCSR);
-				val &= ~(MUSB_RXCSR_DMAENAB
-					| MUSB_RXCSR_H_AUTOREQ
-					| MUSB_RXCSR_AUTOCLEAR);
-				musb_writew(epio, MUSB_RXCSR, val);
-			}
+				dev_err(musb->controller, "error: rx_dma failed\n");
 		}
-#endif	/* Mentor DMA */
 
 		if (!dma) {
 			unsigned int received_len;
diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h
index 8a57a6f..17a80ae 100644
--- a/drivers/usb/musb/musb_io.h
+++ b/drivers/usb/musb/musb_io.h
@@ -47,6 +47,7 @@
  * @fifo_offset: platform specific function to get fifo offset
  * @read_fifo:	platform specific function to read fifo
  * @write_fifo:	platform specific function to write fifo
+ * @busctl_offset: platform specific function to get busctl offset
  */
 struct musb_io {
 	u32	quirks;
@@ -55,6 +56,7 @@ struct musb_io {
 	u32	(*fifo_offset)(u8 epnum);
 	void	(*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
 	void	(*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
+	u32	(*busctl_offset)(u8 epnum, u16 offset);
 };
 
 /* Do not add new entries here, add them the struct musb_io instead */
diff --git a/drivers/usb/musb/musb_regs.h b/drivers/usb/musb/musb_regs.h
index 11f0be0..cff5bcf 100644
--- a/drivers/usb/musb/musb_regs.h
+++ b/drivers/usb/musb/musb_regs.h
@@ -300,9 +300,6 @@
 #define MUSB_RXHUBADDR		0x06
 #define MUSB_RXHUBPORT		0x07
 
-#define MUSB_BUSCTL_OFFSET(_epnum, _offset) \
-	(0x80 + (8*(_epnum)) + (_offset))
-
 static inline void musb_write_txfifosz(void __iomem *mbase, u8 c_size)
 {
 	musb_writeb(mbase, MUSB_TXFIFOSZ, c_size);
@@ -364,78 +361,84 @@ static inline u16 musb_read_hwvers(void __iomem *mbase)
 	return musb_readw(mbase, MUSB_HWVERS);
 }
 
-static inline void __iomem *musb_read_target_reg_base(u8 i, void __iomem *mbase)
-{
-	return (MUSB_BUSCTL_OFFSET(i, 0) + mbase);
-}
-
-static inline void musb_write_rxfunaddr(void __iomem *ep_target_regs,
+static inline void musb_write_rxfunaddr(struct musb *musb, u8 epnum,
 		u8 qh_addr_reg)
 {
-	musb_writeb(ep_target_regs, MUSB_RXFUNCADDR, qh_addr_reg);
+	musb_writeb(musb->mregs,
+		    musb->io.busctl_offset(epnum, MUSB_RXFUNCADDR),
+		    qh_addr_reg);
 }
 
-static inline void musb_write_rxhubaddr(void __iomem *ep_target_regs,
+static inline void musb_write_rxhubaddr(struct musb *musb, u8 epnum,
 		u8 qh_h_addr_reg)
 {
-	musb_writeb(ep_target_regs, MUSB_RXHUBADDR, qh_h_addr_reg);
+	musb_writeb(musb->mregs, musb->io.busctl_offset(epnum, MUSB_RXHUBADDR),
+			qh_h_addr_reg);
 }
 
-static inline void musb_write_rxhubport(void __iomem *ep_target_regs,
+static inline void musb_write_rxhubport(struct musb *musb, u8 epnum,
 		u8 qh_h_port_reg)
 {
-	musb_writeb(ep_target_regs, MUSB_RXHUBPORT, qh_h_port_reg);
+	musb_writeb(musb->mregs, musb->io.busctl_offset(epnum, MUSB_RXHUBPORT),
+			qh_h_port_reg);
 }
 
-static inline void  musb_write_txfunaddr(void __iomem *mbase, u8 epnum,
+static inline void musb_write_txfunaddr(struct musb *musb, u8 epnum,
 		u8 qh_addr_reg)
 {
-	musb_writeb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXFUNCADDR),
-			qh_addr_reg);
+	musb_writeb(musb->mregs,
+		    musb->io.busctl_offset(epnum, MUSB_TXFUNCADDR),
+		    qh_addr_reg);
 }
 
-static inline void  musb_write_txhubaddr(void __iomem *mbase, u8 epnum,
+static inline void musb_write_txhubaddr(struct musb *musb, u8 epnum,
 		u8 qh_addr_reg)
 {
-	musb_writeb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXHUBADDR),
+	musb_writeb(musb->mregs, musb->io.busctl_offset(epnum, MUSB_TXHUBADDR),
 			qh_addr_reg);
 }
 
-static inline void  musb_write_txhubport(void __iomem *mbase, u8 epnum,
+static inline void musb_write_txhubport(struct musb *musb, u8 epnum,
 		u8 qh_h_port_reg)
 {
-	musb_writeb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXHUBPORT),
+	musb_writeb(musb->mregs, musb->io.busctl_offset(epnum, MUSB_TXHUBPORT),
 			qh_h_port_reg);
 }
 
-static inline u8 musb_read_rxfunaddr(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_rxfunaddr(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_RXFUNCADDR));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_RXFUNCADDR));
 }
 
-static inline u8 musb_read_rxhubaddr(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_rxhubaddr(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_RXHUBADDR));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_RXHUBADDR));
 }
 
-static inline u8 musb_read_rxhubport(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_rxhubport(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_RXHUBPORT));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_RXHUBPORT));
 }
 
-static inline u8  musb_read_txfunaddr(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_txfunaddr(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXFUNCADDR));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_TXFUNCADDR));
 }
 
-static inline u8  musb_read_txhubaddr(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_txhubaddr(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXHUBADDR));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_TXHUBADDR));
 }
 
-static inline u8  musb_read_txhubport(void __iomem *mbase, u8 epnum)
+static inline u8 musb_read_txhubport(struct musb *musb, u8 epnum)
 {
-	return musb_readb(mbase, MUSB_BUSCTL_OFFSET(epnum, MUSB_TXHUBPORT));
+	return musb_readb(musb->mregs,
+			  musb->io.busctl_offset(epnum, MUSB_TXHUBPORT));
 }
 
 #else /* CONFIG_BLACKFIN */
@@ -556,22 +559,17 @@ static inline u16 musb_read_hwvers(void __iomem *mbase)
 	return MUSB_HWVERS_1900;
 }
 
-static inline void __iomem *musb_read_target_reg_base(u8 i, void __iomem *mbase)
-{
-	return NULL;
-}
-
-static inline void musb_write_rxfunaddr(void __iomem *ep_target_regs,
+static inline void musb_write_rxfunaddr(void __iomem *mbase, u8 epnum,
 		u8 qh_addr_req)
 {
 }
 
-static inline void musb_write_rxhubaddr(void __iomem *ep_target_regs,
+static inline void musb_write_rxhubaddr(void __iomem *mbase, u8 epnum,
 		u8 qh_h_addr_reg)
 {
 }
 
-static inline void musb_write_rxhubport(void __iomem *ep_target_regs,
+static inline void musb_write_rxhubport(void __iomem *mbase, u8 epnum,
 		u8 qh_h_port_reg)
 {
 }
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index 86c4b53..30842bc 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -195,8 +195,10 @@ void musb_port_reset(struct musb *musb, bool do_reset)
 				      msecs_to_jiffies(50));
 	} else {
 		dev_dbg(musb->controller, "root port reset stopped\n");
+		musb_platform_pre_root_reset_end(musb);
 		musb_writeb(mbase, MUSB_POWER,
 				power & ~MUSB_POWER_RESET);
+		musb_platform_post_root_reset_end(musb);
 
 		power = musb_readb(mbase, MUSB_POWER);
 		if (power & MUSB_POWER_HSMODE) {
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index ab7ec09..7539c31 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -357,7 +357,7 @@ done:
 	return retval;
 }
 
-void dma_controller_destroy(struct dma_controller *c)
+void musbhs_dma_controller_destroy(struct dma_controller *c)
 {
 	struct musb_dma_controller *controller = container_of(c,
 			struct musb_dma_controller, controller);
@@ -369,8 +369,10 @@ void dma_controller_destroy(struct dma_controller *c)
 
 	kfree(controller);
 }
+EXPORT_SYMBOL_GPL(musbhs_dma_controller_destroy);
 
-struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *base)
+struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
+						    void __iomem *base)
 {
 	struct musb_dma_controller *controller;
 	struct device *dev = musb->controller;
@@ -398,7 +400,7 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *ba
 	if (request_irq(irq, dma_controller_irq, 0,
 			dev_name(musb->controller), &controller->controller)) {
 		dev_err(dev, "request_irq %d failed!\n", irq);
-		dma_controller_destroy(&controller->controller);
+		musb_dma_controller_destroy(&controller->controller);
 
 		return NULL;
 	}
@@ -407,3 +409,4 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *ba
 
 	return &controller->controller;
 }
+EXPORT_SYMBOL_GPL(musbhs_dma_controller_create);
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index cc752d8..70f2b8a 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -493,6 +493,11 @@ static int omap2430_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops omap2430_ops = {
+	.quirks		= MUSB_DMA_INVENTRA,
+#ifdef CONFIG_USB_INVENTRA_DMA
+	.dma_init	= musbhs_dma_controller_create,
+	.dma_exit	= musbhs_dma_controller_destroy,
+#endif
 	.init		= omap2430_musb_init,
 	.exit		= omap2430_musb_exit,
 
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 3a5ffd5..df7c9f4 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -890,7 +890,7 @@ static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
 
 		dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
 		real_dma_src = ~real_dma_src & dma_src;
-		if (tusb_dma_omap() && real_dma_src) {
+		if (tusb_dma_omap(musb) && real_dma_src) {
 			int	tx_source = (real_dma_src & 0xffff);
 			int	i;
 
@@ -1181,7 +1181,7 @@ static int tusb_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops tusb_ops = {
-	.quirks		= MUSB_IN_TUSB,
+	.quirks		= MUSB_DMA_TUSB_OMAP | MUSB_IN_TUSB,
 	.init		= tusb_musb_init,
 	.exit		= tusb_musb_exit,
 
@@ -1192,6 +1192,10 @@ static const struct musb_platform_ops tusb_ops = {
 	.writeb		= tusb_writeb,
 	.read_fifo	= tusb_read_fifo,
 	.write_fifo	= tusb_write_fifo,
+#ifdef CONFIG_USB_TUSB_OMAP_DMA
+	.dma_init	= tusb_dma_controller_create,
+	.dma_exit	= tusb_dma_controller_destroy,
+#endif
 	.enable		= tusb_musb_enable,
 	.disable	= tusb_musb_disable,
 
diff --git a/drivers/usb/musb/tusb6010.h b/drivers/usb/musb/tusb6010.h
index aec86c8..72cdad2 100644
--- a/drivers/usb/musb/tusb6010.h
+++ b/drivers/usb/musb/tusb6010.h
@@ -12,12 +12,6 @@
 #ifndef __TUSB6010_H__
 #define __TUSB6010_H__
 
-#ifdef CONFIG_USB_TUSB_OMAP_DMA
-#define tusb_dma_omap()			1
-#else
-#define tusb_dma_omap()			0
-#endif
-
 /* VLYNQ control register. 32-bit at offset 0x000 */
 #define TUSB_VLYNQ_CTRL			0x004
 
diff --git a/drivers/usb/musb/tusb6010_omap.c b/drivers/usb/musb/tusb6010_omap.c
index 3ce152c..4c82077 100644
--- a/drivers/usb/musb/tusb6010_omap.c
+++ b/drivers/usb/musb/tusb6010_omap.c
@@ -625,7 +625,7 @@ static void tusb_omap_dma_release(struct dma_channel *channel)
 	channel = NULL;
 }
 
-void dma_controller_destroy(struct dma_controller *c)
+void tusb_dma_controller_destroy(struct dma_controller *c)
 {
 	struct tusb_omap_dma	*tusb_dma;
 	int			i;
@@ -644,8 +644,10 @@ void dma_controller_destroy(struct dma_controller *c)
 
 	kfree(tusb_dma);
 }
+EXPORT_SYMBOL_GPL(tusb_dma_controller_destroy);
 
-struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *base)
+struct dma_controller *
+tusb_dma_controller_create(struct musb *musb, void __iomem *base)
 {
 	void __iomem		*tbase = musb->ctrl_base;
 	struct tusb_omap_dma	*tusb_dma;
@@ -701,7 +703,8 @@ struct dma_controller *dma_controller_create(struct musb *musb, void __iomem *ba
 	return &tusb_dma->controller;
 
 cleanup:
-	dma_controller_destroy(&tusb_dma->controller);
+	musb_dma_controller_destroy(&tusb_dma->controller);
 out:
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(tusb_dma_controller_create);
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
index abf7272..39168fe 100644
--- a/drivers/usb/musb/ux500.c
+++ b/drivers/usb/musb/ux500.c
@@ -188,7 +188,11 @@ static int ux500_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops ux500_ops = {
-	.quirks		= MUSB_INDEXED_EP,
+	.quirks		= MUSB_DMA_UX500 | MUSB_INDEXED_EP,
+#ifdef CONFIG_USB_UX500_DMA
+	.dma_init	= ux500_dma_controller_create,
+	.dma_exit	= ux500_dma_controller_destroy,
+#endif
 	.init		= ux500_musb_init,
 	.exit		= ux500_musb_exit,
 	.fifo_mode	= 5,
@@ -338,7 +342,7 @@ static int ux500_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int ux500_suspend(struct device *dev)
 {
 	struct ux500_glue	*glue = dev_get_drvdata(dev);
diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index e93845c..d0b6a1c 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -359,7 +359,7 @@ static int ux500_dma_controller_start(struct ux500_dma_controller *controller)
 	return 0;
 }
 
-void dma_controller_destroy(struct dma_controller *c)
+void ux500_dma_controller_destroy(struct dma_controller *c)
 {
 	struct ux500_dma_controller *controller = container_of(c,
 			struct ux500_dma_controller, controller);
@@ -367,9 +367,10 @@ void dma_controller_destroy(struct dma_controller *c)
 	ux500_dma_controller_stop(controller);
 	kfree(controller);
 }
+EXPORT_SYMBOL_GPL(ux500_dma_controller_destroy);
 
-struct dma_controller *dma_controller_create(struct musb *musb,
-					void __iomem *base)
+struct dma_controller *
+ux500_dma_controller_create(struct musb *musb, void __iomem *base)
 {
 	struct ux500_dma_controller *controller;
 	struct platform_device *pdev = to_platform_device(musb->controller);
@@ -407,3 +408,4 @@ plat_get_fail:
 kzalloc_fail:
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(ux500_dma_controller_create);
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 3cd3bee..869c0cfcad 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -91,7 +91,7 @@ config TWL6030_USB
 
 config USB_GPIO_VBUS
 	tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
-	depends on GPIOLIB
+	depends on GPIOLIB || COMPILE_TEST
 	select USB_PHY
 	help
 	  Provides simple GPIO VBUS sensing for controllers with an
@@ -141,6 +141,7 @@ config USB_MSM_OTG
 	tristate "Qualcomm on-chip USB OTG controller support"
 	depends on (USB || USB_GADGET) && (ARCH_QCOM || COMPILE_TEST)
 	depends on RESET_CONTROLLER
+	depends on EXTCON
 	select USB_PHY
 	help
 	  Enable this to support the USB OTG transceiver on Qualcomm chips. It
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index c9156be..00c49bb 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -240,8 +240,14 @@ static void ulpi_init(struct msm_otg *motg)
 static int msm_phy_notify_disconnect(struct usb_phy *phy,
 				   enum usb_device_speed speed)
 {
+	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
 	int val;
 
+	if (motg->manual_pullup) {
+		val = ULPI_MISC_A_VBUSVLDEXT | ULPI_MISC_A_VBUSVLDEXTSEL;
+		usb_phy_io_write(phy, val, ULPI_CLR(ULPI_MISC_A));
+	}
+
 	/*
 	 * Put the transceiver in non-driving mode. Otherwise host
 	 * may not detect soft-disconnection.
@@ -422,6 +428,24 @@ static int msm_phy_init(struct usb_phy *phy)
 		ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_FALL);
 	}
 
+	if (motg->manual_pullup) {
+		val = ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT;
+		ulpi_write(phy, val, ULPI_SET(ULPI_MISC_A));
+
+		val = readl(USB_GENCONFIG_2);
+		val |= GENCONFIG_2_SESS_VLD_CTRL_EN;
+		writel(val, USB_GENCONFIG_2);
+
+		val = readl(USB_USBCMD);
+		val |= USBCMD_SESS_VLD_CTRL;
+		writel(val, USB_USBCMD);
+
+		val = ulpi_read(phy, ULPI_FUNC_CTRL);
+		val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
+		val |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
+		ulpi_write(phy, val, ULPI_FUNC_CTRL);
+	}
+
 	if (motg->phy_number)
 		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
 
@@ -1436,9 +1460,42 @@ static const struct of_device_id msm_otg_dt_match[] = {
 };
 MODULE_DEVICE_TABLE(of, msm_otg_dt_match);
 
+static int msm_otg_vbus_notifier(struct notifier_block *nb, unsigned long event,
+				void *ptr)
+{
+	struct msm_usb_cable *vbus = container_of(nb, struct msm_usb_cable, nb);
+	struct msm_otg *motg = container_of(vbus, struct msm_otg, vbus);
+
+	if (event)
+		set_bit(B_SESS_VLD, &motg->inputs);
+	else
+		clear_bit(B_SESS_VLD, &motg->inputs);
+
+	schedule_work(&motg->sm_work);
+
+	return NOTIFY_DONE;
+}
+
+static int msm_otg_id_notifier(struct notifier_block *nb, unsigned long event,
+				void *ptr)
+{
+	struct msm_usb_cable *id = container_of(nb, struct msm_usb_cable, nb);
+	struct msm_otg *motg = container_of(id, struct msm_otg, id);
+
+	if (event)
+		clear_bit(ID, &motg->inputs);
+	else
+		set_bit(ID, &motg->inputs);
+
+	schedule_work(&motg->sm_work);
+
+	return NOTIFY_DONE;
+}
+
 static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 {
 	struct msm_otg_platform_data *pdata;
+	struct extcon_dev *ext_id, *ext_vbus;
 	const struct of_device_id *id;
 	struct device_node *node = pdev->dev.of_node;
 	struct property *prop;
@@ -1487,6 +1544,54 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 		motg->vdd_levels[VDD_LEVEL_MAX] = tmp[VDD_LEVEL_MAX];
 	}
 
+	motg->manual_pullup = of_property_read_bool(node, "qcom,manual-pullup");
+
+	ext_id = ERR_PTR(-ENODEV);
+	ext_vbus = ERR_PTR(-ENODEV);
+	if (of_property_read_bool(node, "extcon")) {
+
+		/* Each one of them is not mandatory */
+		ext_vbus = extcon_get_edev_by_phandle(&pdev->dev, 0);
+		if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
+			return PTR_ERR(ext_vbus);
+
+		ext_id = extcon_get_edev_by_phandle(&pdev->dev, 1);
+		if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
+			return PTR_ERR(ext_id);
+	}
+
+	if (!IS_ERR(ext_vbus)) {
+		motg->vbus.nb.notifier_call = msm_otg_vbus_notifier;
+		ret = extcon_register_interest(&motg->vbus.conn, ext_vbus->name,
+					       "USB", &motg->vbus.nb);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "register VBUS notifier failed\n");
+			return ret;
+		}
+
+		ret = extcon_get_cable_state(ext_vbus, "USB");
+		if (ret)
+			set_bit(B_SESS_VLD, &motg->inputs);
+		else
+			clear_bit(B_SESS_VLD, &motg->inputs);
+	}
+
+	if (!IS_ERR(ext_id)) {
+		motg->id.nb.notifier_call = msm_otg_id_notifier;
+		ret = extcon_register_interest(&motg->id.conn, ext_id->name,
+					       "USB-HOST", &motg->id.nb);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "register ID notifier failed\n");
+			return ret;
+		}
+
+		ret = extcon_get_cable_state(ext_id, "USB-HOST");
+		if (ret)
+			clear_bit(ID, &motg->inputs);
+		else
+			set_bit(ID, &motg->inputs);
+	}
+
 	prop = of_find_property(node, "qcom,phy-init-sequence", &len);
 	if (!prop || !len)
 		return 0;
@@ -1700,6 +1805,11 @@ static int msm_otg_remove(struct platform_device *pdev)
 	if (phy->otg->host || phy->otg->gadget)
 		return -EBUSY;
 
+	if (motg->id.conn.edev)
+		extcon_unregister_interest(&motg->id.conn);
+	if (motg->vbus.conn.edev)
+		extcon_unregister_interest(&motg->vbus.conn);
+
 	msm_otg_debugfs_cleanup();
 	cancel_delayed_work_sync(&motg->chg_work);
 	cancel_work_sync(&motg->sm_work);
diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index d1cd6b5..98f75d28 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -22,6 +22,11 @@ static LIST_HEAD(phy_list);
 static LIST_HEAD(phy_bind_list);
 static DEFINE_SPINLOCK(phy_lock);
 
+struct phy_devm {
+	struct usb_phy *phy;
+	struct notifier_block *nb;
+};
+
 static struct usb_phy *__usb_find_phy(struct list_head *list,
 	enum usb_phy_type type)
 {
@@ -79,6 +84,15 @@ static void devm_usb_phy_release(struct device *dev, void *res)
 	usb_put_phy(phy);
 }
 
+static void devm_usb_phy_release2(struct device *dev, void *_res)
+{
+	struct phy_devm *res = _res;
+
+	if (res->nb)
+		usb_unregister_notifier(res->phy, res->nb);
+	usb_put_phy(res->phy);
+}
+
 static int devm_usb_phy_match(struct device *dev, void *res, void *match_data)
 {
 	struct usb_phy **phy = res;
@@ -153,40 +167,30 @@ err0:
 EXPORT_SYMBOL_GPL(usb_get_phy);
 
 /**
- * devm_usb_get_phy_by_phandle - find the USB PHY by phandle
+ * devm_usb_get_phy_by_node - find the USB PHY by device_node
  * @dev - device that requests this phy
- * @phandle - name of the property holding the phy phandle value
- * @index - the index of the phy
+ * @node - the device_node for the phy device.
+ * @nb - a notifier_block to register with the phy.
  *
- * Returns the phy driver associated with the given phandle value,
+ * Returns the phy driver associated with the given device_node,
  * after getting a refcount to it, -ENODEV if there is no such phy or
- * -EPROBE_DEFER if there is a phandle to the phy, but the device is
- * not yet loaded. While at that, it also associates the device with
+ * -EPROBE_DEFER if the device is not yet loaded. While at that, it
+ * also associates the device with
  * the phy 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.
+ * For use by peripheral drivers for devices related to a phy,
+ * such as a charger.
  */
-struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
-	const char *phandle, u8 index)
+struct  usb_phy *devm_usb_get_phy_by_node(struct device *dev,
+					  struct device_node *node,
+					  struct notifier_block *nb)
 {
-	struct usb_phy	*phy = ERR_PTR(-ENOMEM), **ptr;
+	struct usb_phy	*phy = ERR_PTR(-ENOMEM);
+	struct phy_devm	*ptr;
 	unsigned long	flags;
-	struct device_node *node;
 
-	if (!dev->of_node) {
-		dev_dbg(dev, "device does not have a device node entry\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	node = of_parse_phandle(dev->of_node, phandle, index);
-	if (!node) {
-		dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle,
-			dev->of_node->full_name);
-		return ERR_PTR(-ENODEV);
-	}
-
-	ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL);
+	ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL);
 	if (!ptr) {
 		dev_dbg(dev, "failed to allocate memory for devres\n");
 		goto err0;
@@ -205,8 +209,10 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
 		devres_free(ptr);
 		goto err1;
 	}
-
-	*ptr = phy;
+	if (nb)
+		usb_register_notifier(phy, nb);
+	ptr->phy = phy;
+	ptr->nb = nb;
 	devres_add(dev, ptr);
 
 	get_device(phy->dev);
@@ -215,10 +221,47 @@ err1:
 	spin_unlock_irqrestore(&phy_lock, flags);
 
 err0:
-	of_node_put(node);
 
 	return phy;
 }
+EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node);
+
+/**
+ * devm_usb_get_phy_by_phandle - find the USB PHY by phandle
+ * @dev - device that requests this phy
+ * @phandle - name of the property holding the phy phandle value
+ * @index - the index of the phy
+ *
+ * Returns the phy driver associated with the given phandle value,
+ * after getting a refcount to it, -ENODEV if there is no such phy or
+ * -EPROBE_DEFER if there is a phandle to the phy, but the device is
+ * not yet loaded. While at that, it also associates the device with
+ * the phy 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 *devm_usb_get_phy_by_phandle(struct device *dev,
+	const char *phandle, u8 index)
+{
+	struct device_node *node;
+	struct usb_phy	*phy;
+
+	if (!dev->of_node) {
+		dev_dbg(dev, "device does not have a device node entry\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	node = of_parse_phandle(dev->of_node, phandle, index);
+	if (!node) {
+		dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle,
+			dev->of_node->full_name);
+		return ERR_PTR(-ENODEV);
+	}
+	phy = devm_usb_get_phy_by_node(dev, node, NULL);
+	of_node_put(node);
+	return phy;
+}
 EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle);
 
 /**
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 0f7e850..e8bf408 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -466,11 +466,15 @@ static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 static const struct of_device_id usbhs_of_match[] = {
 	{
 		.compatible = "renesas,usbhs-r8a7790",
-		.data = (void *)USBHS_TYPE_R8A7790,
+		.data = (void *)USBHS_TYPE_RCAR_GEN2,
 	},
 	{
 		.compatible = "renesas,usbhs-r8a7791",
-		.data = (void *)USBHS_TYPE_R8A7791,
+		.data = (void *)USBHS_TYPE_RCAR_GEN2,
+	},
+	{
+		.compatible = "renesas,usbhs-r8a7794",
+		.data = (void *)USBHS_TYPE_RCAR_GEN2,
 	},
 	{ },
 };
@@ -497,14 +501,8 @@ static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 	if (gpio > 0)
 		dparam->enable_gpio = gpio;
 
-	switch (dparam->type) {
-	case USBHS_TYPE_R8A7790:
-	case USBHS_TYPE_R8A7791:
+	if (dparam->type == USBHS_TYPE_RCAR_GEN2)
 		dparam->has_usb_dmac = 1;
-		break;
-	default:
-		break;
-	}
 
 	return info;
 }
@@ -559,8 +557,7 @@ static int usbhs_probe(struct platform_device *pdev)
 	       sizeof(struct renesas_usbhs_driver_param));
 
 	switch (priv->dparam.type) {
-	case USBHS_TYPE_R8A7790:
-	case USBHS_TYPE_R8A7791:
+	case USBHS_TYPE_RCAR_GEN2:
 		priv->pfunc = usbhs_rcar2_ops;
 		if (!priv->dparam.pipe_type) {
 			priv->dparam.pipe_type = usbhsc_new_pipe_type;
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index fa126a2..c0f5c65 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -1239,15 +1239,21 @@ static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo,
 {
 	char name[16];
 
-	snprintf(name, sizeof(name), "tx%d", channel);
-	fifo->tx_chan = dma_request_slave_channel_reason(dev, name);
-	if (IS_ERR(fifo->tx_chan))
-		fifo->tx_chan = NULL;
-
-	snprintf(name, sizeof(name), "rx%d", channel);
-	fifo->rx_chan = dma_request_slave_channel_reason(dev, name);
-	if (IS_ERR(fifo->rx_chan))
-		fifo->rx_chan = NULL;
+	/*
+	 * To avoid complex handing for DnFIFOs, the driver uses each
+	 * DnFIFO as TX or RX direction (not bi-direction).
+	 * So, the driver uses odd channels for TX, even channels for RX.
+	 */
+	snprintf(name, sizeof(name), "ch%d", channel);
+	if (channel & 1) {
+		fifo->tx_chan = dma_request_slave_channel_reason(dev, name);
+		if (IS_ERR(fifo->tx_chan))
+			fifo->tx_chan = NULL;
+	} else {
+		fifo->rx_chan = dma_request_slave_channel_reason(dev, name);
+		if (IS_ERR(fifo->rx_chan))
+			fifo->rx_chan = NULL;
+	}
 }
 
 static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo,
diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h
index 04d3f8a..c7d9b86 100644
--- a/drivers/usb/renesas_usbhs/fifo.h
+++ b/drivers/usb/renesas_usbhs/fifo.h
@@ -44,10 +44,11 @@ struct usbhs_fifo_info {
 	struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
 };
 #define usbhsf_get_dnfifo(p, n)	(&((p)->fifo_info.dfifo[n]))
-#define usbhs_for_each_dfifo(priv, dfifo, i)				\
-	for ((i) = 0, dfifo = usbhsf_get_dnfifo(priv, (i));		\
-	     ((i) < USBHS_MAX_NUM_DFIFO);				\
-	     (i)++, dfifo = usbhsf_get_dnfifo(priv, (i)))
+#define usbhs_for_each_dfifo(priv, dfifo, i)			\
+	for ((i) = 0;						\
+	     ((i) < USBHS_MAX_NUM_DFIFO) &&			\
+		     ((dfifo) = usbhsf_get_dnfifo(priv, (i)));	\
+	     (i)++)
 
 struct usbhs_pkt_handle;
 struct usbhs_pkt {
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c
index 9a705b1..d4be5d5 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -218,10 +218,14 @@ static int usbhs_status_get_each_irq(struct usbhs_priv *priv,
 	/********************  spin lock ********************/
 	usbhs_lock(priv, flags);
 	state->intsts0 = usbhs_read(priv, INTSTS0);
-	state->intsts1 = usbhs_read(priv, INTSTS1);
-
 	intenb0 = usbhs_read(priv, INTENB0);
-	intenb1 = usbhs_read(priv, INTENB1);
+
+	if (usbhs_mod_is_host(priv)) {
+		state->intsts1 = usbhs_read(priv, INTSTS1);
+		intenb1 = usbhs_read(priv, INTENB1);
+	} else {
+		state->intsts1 = intenb1 = 0;
+	}
 
 	/* mask */
 	if (mod) {
@@ -275,7 +279,8 @@ static irqreturn_t usbhs_interrupt(int irq, void *data)
 	 *	   - Function :: VALID bit should 0
 	 */
 	usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
-	usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
+	if (usbhs_mod_is_host(priv))
+		usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
 
 	usbhs_write(priv, BRDYSTS, ~irq_state.brdysts);
 	usbhs_write(priv, NRDYSTS, ~irq_state.nrdysts);
@@ -303,19 +308,20 @@ static irqreturn_t usbhs_interrupt(int irq, void *data)
 	if (irq_state.intsts0 & BRDY)
 		usbhs_mod_call(priv, irq_ready, priv, &irq_state);
 
-	/* INTSTS1 */
-	if (irq_state.intsts1 & ATTCH)
-		usbhs_mod_call(priv, irq_attch, priv, &irq_state);
-
-	if (irq_state.intsts1 & DTCH)
-		usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
+	if (usbhs_mod_is_host(priv)) {
+		/* INTSTS1 */
+		if (irq_state.intsts1 & ATTCH)
+			usbhs_mod_call(priv, irq_attch, priv, &irq_state);
 
-	if (irq_state.intsts1 & SIGN)
-		usbhs_mod_call(priv, irq_sign, priv, &irq_state);
+		if (irq_state.intsts1 & DTCH)
+			usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
 
-	if (irq_state.intsts1 & SACK)
-		usbhs_mod_call(priv, irq_sack, priv, &irq_state);
+		if (irq_state.intsts1 & SIGN)
+			usbhs_mod_call(priv, irq_sign, priv, &irq_state);
 
+		if (irq_state.intsts1 & SACK)
+			usbhs_mod_call(priv, irq_sack, priv, &irq_state);
+	}
 	return IRQ_HANDLED;
 }
 
@@ -334,7 +340,8 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
 	 *  - update INTSTS0
 	 */
 	usbhs_write(priv, INTENB0, 0);
-	usbhs_write(priv, INTENB1, 0);
+	if (usbhs_mod_is_host(priv))
+		usbhs_write(priv, INTENB1, 0);
 
 	usbhs_write(priv, BEMPENB, 0);
 	usbhs_write(priv, BRDYENB, 0);
@@ -368,25 +375,27 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
 			intenb0 |= BRDYE;
 		}
 
-		/*
-		 * INTSTS1
-		 */
-		if (mod->irq_attch)
-			intenb1 |= ATTCHE;
+		if (usbhs_mod_is_host(priv)) {
+			/*
+			 * INTSTS1
+			 */
+			if (mod->irq_attch)
+				intenb1 |= ATTCHE;
 
-		if (mod->irq_dtch)
-			intenb1 |= DTCHE;
+			if (mod->irq_dtch)
+				intenb1 |= DTCHE;
 
-		if (mod->irq_sign)
-			intenb1 |= SIGNE;
+			if (mod->irq_sign)
+				intenb1 |= SIGNE;
 
-		if (mod->irq_sack)
-			intenb1 |= SACKE;
+			if (mod->irq_sack)
+				intenb1 |= SACKE;
+		}
 	}
 
 	if (intenb0)
 		usbhs_write(priv, INTENB0, intenb0);
 
-	if (intenb1)
+	if (usbhs_mod_is_host(priv) && intenb1)
 		usbhs_write(priv, INTENB1, intenb1);
 }