Merge 3.1-rc4 into usb-next

This was done to resolve a conflict in this file:
	drivers/usb/host/xhci-ring.c

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/usb/dwc3.txt

@@ -0,0 +1,53 @@
+
+ TODO
+~~~~~~
+Please pick something while reading :)
+
+- Implement streaming support for BULK endpoints
+  Tatyana's patch "usb: Add streams support to the gadget framework"
+  introduces streaming support for the gadget driver.
+  Every usb_request has new field called stream_id which holds its id.
+  Every usb_ep has a field num_supported_strms which describes the max
+  number of streams supported (for this ep).
+  UAS is AFAIK the only gadget with streaming support.
+
+- Convert interrupt handler to per-ep-thread-irq
+
+  As it turns out some DWC3-commands ~1ms to complete. Currently we spin
+  until the command completes which is bad.
+
+  Implementation idea:
+  - dwc core implements a demultiplexing irq chip for interrupts per
+    endpoint. The interrupt numbers are allocated during probe and belong
+    to the device. If MSI provides per-endpoint interrupt this dummy
+    interrupt chip can be replaced with "real" interrupts.
+  - interrupts are requested / allocated on usb_ep_enable() and removed on
+    usb_ep_disable(). Worst case are 32 interrupts, the lower limit is two
+    for ep0/1.
+  - dwc3_send_gadget_ep_cmd() will sleep in wait_for_completion_timeout()
+    until the command completes.
+  - the interrupt handler is split into the following pieces:
+    - primary handler of the device
+      goes through every event and calls generic_handle_irq() for event
+      it. On return from generic_handle_irq() in acknowledges the event
+      counter so interrupt goes away (eventually).
+
+    - threaded handler of the device
+      none
+
+    - primary handler of the EP-interrupt
+      reads the event and tries to process it. Everything that requries
+      sleeping is handed over to the Thread. The event is saved in an
+      per-endpoint data-structure.
+      We probably have to pay attention not to process events once we
+      handed something to thread so we don't process event X prio Y
+      where X > Y.
+
+    - threaded handler of the EP-interrupt
+      handles the remaining EP work which might sleep such as waiting
+      for command completion.
+
+  Latency:
+   There should be no increase in latency since the interrupt-thread has a
+   high priority and will be run before an average task in user land
+   (except the user changed priorities).

MAINTAINERS

@@ -2139,6 +2139,14 @@ M:	Matthew Garrett <mjg59@srcf.ucam.org>
 S:	Maintained
 F:	drivers/platform/x86/dell-wmi.c
 
+DESIGNWARE USB3 DRD IP DRIVER
+M:	Felipe Balbi <balbi@ti.com>
+L:	linux-usb@vger.kernel.org
+L:	linux-omap@vger.kernel.org
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
+S:	Maintained
+F:	drivers/usb/dwc3/
+
 DEVICE NUMBER REGISTRY
 M:	Torben Mathiasen <device@lanana.org>
 W:	http://lanana.org/docs/device-list/index.html

arch/arm/mach-mmp/include/mach/pxa168.h

@@ -35,6 +35,13 @@ extern struct pxa_device_desc pxa168_device_fb;
 extern struct pxa_device_desc pxa168_device_keypad;
 extern struct pxa_device_desc pxa168_device_eth;
 
+struct pxa168_usb_pdata {
+	/* If NULL, default phy init routine for PXA168 would be called */
+	int (*phy_init)(void __iomem *usb_phy_reg_base);
+};
+/* pdata can be NULL */
+int __init pxa168_add_usb_host(struct pxa168_usb_pdata *pdata);
+
 static inline int pxa168_add_uart(int id)
 {
 	struct pxa_device_desc *d = NULL;

arch/arm/mach-mmp/pxa168.c

@@ -25,6 +25,9 @@
 #include <mach/dma.h>
 #include <mach/devices.h>
 #include <mach/mfp.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <mach/pxa168.h>
 
 #include "common.h"
 #include "clock.h"
@@ -83,6 +86,7 @@ static APBC_CLK(keypad, PXA168_KPC, 0, 32000);
 static APMU_CLK(nand, NAND, 0x19b, 156000000);
 static APMU_CLK(lcd, LCD, 0x7f, 312000000);
 static APMU_CLK(eth, ETH, 0x09, 0);
+static APMU_CLK(usb, USB, 0x12, 0);
 
 /* device and clock bindings */
 static struct clk_lookup pxa168_clkregs[] = {
@@ -104,6 +108,7 @@ static struct clk_lookup pxa168_clkregs[] = {
 	INIT_CLKREG(&clk_lcd, "pxa168-fb", NULL),
 	INIT_CLKREG(&clk_keypad, "pxa27x-keypad", NULL),
 	INIT_CLKREG(&clk_eth, "pxa168-eth", "MFUCLK"),
+	INIT_CLKREG(&clk_usb, "pxa168-ehci", "PXA168-USBCLK"),
 };
 
 static int __init pxa168_init(void)
@@ -169,3 +174,44 @@ PXA168_DEVICE(ssp5, "pxa168-ssp", 4, SSP5, 0xd4021000, 0x40, 60, 61);
 PXA168_DEVICE(fb, "pxa168-fb", -1, LCD, 0xd420b000, 0x1c8);
 PXA168_DEVICE(keypad, "pxa27x-keypad", -1, KEYPAD, 0xd4012000, 0x4c);
 PXA168_DEVICE(eth, "pxa168-eth", -1, MFU, 0xc0800000, 0x0fff);
+
+struct resource pxa168_usb_host_resources[] = {
+	/* USB Host conroller register base */
+	[0] = {
+		.start	= 0xd4209000,
+		.end	= 0xd4209000 + 0x200,
+		.flags	= IORESOURCE_MEM,
+		.name	= "pxa168-usb-host",
+	},
+	/* USB PHY register base */
+	[1] = {
+		.start	= 0xd4206000,
+		.end	= 0xd4206000 + 0xff,
+		.flags	= IORESOURCE_MEM,
+		.name	= "pxa168-usb-phy",
+	},
+	[2] = {
+		.start	= IRQ_PXA168_USB2,
+		.end	= IRQ_PXA168_USB2,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static u64 pxa168_usb_host_dmamask = DMA_BIT_MASK(32);
+struct platform_device pxa168_device_usb_host = {
+	.name = "pxa168-ehci",
+	.id   = -1,
+	.dev  = {
+		.dma_mask = &pxa168_usb_host_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+
+	.num_resources = ARRAY_SIZE(pxa168_usb_host_resources),
+	.resource      = pxa168_usb_host_resources,
+};
+
+int __init pxa168_add_usb_host(struct pxa168_usb_pdata *pdata)
+{
+	pxa168_device_usb_host.dev.platform_data = pdata;
+	return platform_device_register(&pxa168_device_usb_host);
+}

drivers/usb/Kconfig

@@ -69,6 +69,7 @@ config USB_ARCH_HAS_EHCI
 	default y if ARCH_MSM
 	default y if MICROBLAZE
 	default y if SPARC_LEON
+	default y if ARCH_MMP
 	default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
@@ -110,6 +111,8 @@ config USB
 
 source "drivers/usb/core/Kconfig"
 
+source "drivers/usb/dwc3/Kconfig"
+
 source "drivers/usb/mon/Kconfig"
 
 source "drivers/usb/wusbcore/Kconfig"

drivers/usb/Makefile

@@ -6,6 +6,8 @@
 
 obj-$(CONFIG_USB)		+= core/
 
+obj-$(CONFIG_USB_DWC3)		+= dwc3/
+
 obj-$(CONFIG_USB_MON)		+= mon/
 
 obj-$(CONFIG_PCI)		+= host/

drivers/usb/class/cdc-acm.c

@@ -1058,11 +1058,11 @@ static int acm_probe(struct usb_interface *intf,
 		goto alloc_fail;
 	}
 
-	ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
-	readsize = le16_to_cpu(epread->wMaxPacketSize) *
+	ctrlsize = usb_endpoint_maxp(epctrl);
+	readsize = usb_endpoint_maxp(epread) *
 				(quirks == SINGLE_RX_URB ? 1 : 2);
 	acm->combined_interfaces = combined_interfaces;
-	acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20;
+	acm->writesize = usb_endpoint_maxp(epwrite) * 20;
 	acm->control = control_interface;
 	acm->data = data_interface;
 	acm->minor = minor;

drivers/usb/class/cdc-wdm.c

@@ -682,7 +682,7 @@ static int wdm_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	if (!ep || !usb_endpoint_is_int_in(ep))
 		goto err;
 
-	desc->wMaxPacketSize = le16_to_cpu(ep->wMaxPacketSize);
+	desc->wMaxPacketSize = usb_endpoint_maxp(ep);
 	desc->bMaxPacketSize0 = udev->descriptor.bMaxPacketSize0;
 
 	desc->orq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);

drivers/usb/class/usbtmc.c

@@ -186,8 +186,7 @@ static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data)
 	for (n = 0; n < current_setting->desc.bNumEndpoints; n++)
 		if (current_setting->endpoint[n].desc.bEndpointAddress ==
 			data->bulk_in)
-			max_size = le16_to_cpu(current_setting->endpoint[n].
-						desc.wMaxPacketSize);
+			max_size = usb_endpoint_maxp(&current_setting->endpoint[n].desc);
 
 	if (max_size == 0) {
 		dev_err(dev, "Couldn't get wMaxPacketSize\n");
@@ -636,7 +635,7 @@ static int usbtmc_ioctl_clear(struct usbtmc_device_data *data)
 	for (n = 0; n < current_setting->desc.bNumEndpoints; n++) {
 		desc = &current_setting->endpoint[n].desc;
 		if (desc->bEndpointAddress == data->bulk_in)
-			max_size = le16_to_cpu(desc->wMaxPacketSize);
+			max_size = usb_endpoint_maxp(desc);
 	}
 
 	if (max_size == 0) {

drivers/usb/core/config.c

@@ -124,9 +124,9 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
 
 	if (usb_endpoint_xfer_isoc(&ep->desc))
 		max_tx = (desc->bMaxBurst + 1) * (desc->bmAttributes + 1) *
-			le16_to_cpu(ep->desc.wMaxPacketSize);
+			usb_endpoint_maxp(&ep->desc);
 	else if (usb_endpoint_xfer_int(&ep->desc))
-		max_tx = le16_to_cpu(ep->desc.wMaxPacketSize) *
+		max_tx = usb_endpoint_maxp(&ep->desc) *
 			(desc->bMaxBurst + 1);
 	else
 		max_tx = 999999;
@@ -241,7 +241,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
 		    cfgno, inum, asnum, d->bEndpointAddress);
 		endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT;
 		endpoint->desc.bInterval = 1;
-		if (le16_to_cpu(endpoint->desc.wMaxPacketSize) > 8)
+		if (usb_endpoint_maxp(&endpoint->desc) > 8)
 			endpoint->desc.wMaxPacketSize = cpu_to_le16(8);
 	}
 
@@ -254,7 +254,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
 			&& usb_endpoint_xfer_bulk(d)) {
 		unsigned maxp;
 
-		maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize) & 0x07ff;
+		maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
 		if (maxp != 512)
 			dev_warn(ddev, "config %d interface %d altsetting %d "
 				"bulk endpoint 0x%X has invalid maxpacket %d\n",

drivers/usb/core/devices.c

@@ -190,7 +190,7 @@ static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end,
 	dir = usb_endpoint_dir_in(desc) ? 'I' : 'O';
 
 	if (speed == USB_SPEED_HIGH) {
-		switch (le16_to_cpu(desc->wMaxPacketSize) & (0x03 << 11)) {
+		switch (usb_endpoint_maxp(desc) & (0x03 << 11)) {
 		case 1 << 11:
 			bandwidth = 2; break;
 		case 2 << 11:
@@ -240,7 +240,7 @@ static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end,
 
 	start += sprintf(start, format_endpt, desc->bEndpointAddress, dir,
 			 desc->bmAttributes, type,
-			 (le16_to_cpu(desc->wMaxPacketSize) & 0x07ff) *
+			 (usb_endpoint_maxp(desc) & 0x07ff) *
 			 bandwidth,
 			 interval, unit);
 	return start;

drivers/usb/core/endpoint.c

@@ -56,7 +56,7 @@ static ssize_t show_ep_wMaxPacketSize(struct device *dev,
 {
 	struct ep_device *ep = to_ep_device(dev);
 	return sprintf(buf, "%04x\n",
-			le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff);
+		        usb_endpoint_maxp(ep->desc) & 0x07ff);
 }
 static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);
 

drivers/usb/core/hub.c

@@ -1636,11 +1636,6 @@ void usb_disconnect(struct usb_device **pdev)
 	int			i;
 	struct usb_hcd		*hcd = bus_to_hcd(udev->bus);
 
-	if (!udev) {
-		pr_debug ("%s nodev\n", __func__);
-		return;
-	}
-
 	/* mark the device as inactive, so any further urb submissions for
 	 * this device (and any of its children) will fail immediately.
 	 * this quiesces everything except pending urbs.
@@ -3023,7 +3018,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 		i = 512;
 	else
 		i = udev->descriptor.bMaxPacketSize0;
-	if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
+	if (usb_endpoint_maxp(&udev->ep0.desc) != i) {
 		if (udev->speed == USB_SPEED_LOW ||
 				!(i == 8 || i == 16 || i == 32 || i == 64)) {
 			dev_err(&udev->dev, "Invalid ep0 maxpacket: %d\n", i);

drivers/usb/core/urb.c

@@ -350,7 +350,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
 			dev->state < USB_STATE_CONFIGURED)
 		return -ENODEV;
 
-	max = le16_to_cpu(ep->desc.wMaxPacketSize);
+	max = usb_endpoint_maxp(&ep->desc);
 	if (max <= 0) {
 		dev_dbg(&dev->dev,
 			"bogus endpoint ep%d%s in %s (bad maxpacket %d)\n",

drivers/usb/dwc3/Kconfig

@@ -0,0 +1,25 @@
+config USB_DWC3
+	tristate "DesignWare USB3 DRD Core Support"
+	depends on (USB || USB_GADGET)
+	select USB_OTG_UTILS
+	help
+	  Say Y or M here if your system has a Dual Role SuperSpeed
+	  USB controller based on the DesignWare USB3 IP Core.
+
+	  If you choose to build this driver is a dynamically linked
+	  module, the module will be called dwc3.ko.
+
+if USB_DWC3
+
+config USB_DWC3_DEBUG
+	bool "Enable Debugging Messages"
+	help
+	  Say Y here to enable debugging messages on DWC3 Driver.
+
+config USB_DWC3_VERBOSE
+	bool "Enable Verbose Debugging Messages"
+	depends on USB_DWC3_DEBUG
+	help
+	  Say Y here to enable verbose debugging messages on DWC3 Driver.
+
+endif

drivers/usb/dwc3/Makefile

@@ -0,0 +1,36 @@
+ccflags-$(CONFIG_USB_DWC3_DEBUG)	:= -DDEBUG
+ccflags-$(CONFIG_USB_DWC3_VERBOSE)	+= -DVERBOSE_DEBUG
+
+obj-$(CONFIG_USB_DWC3)			+= dwc3.o
+
+dwc3-y					:= core.o
+
+ifneq ($(CONFIG_USB_GADGET_DWC3),)
+	dwc3-y				+= gadget.o ep0.o
+endif
+
+ifneq ($(CONFIG_DEBUG_FS),)
+	dwc3-y				+= debugfs.o
+endif
+
+##
+# Platform-specific glue layers go here
+#
+# NOTICE: Make sure your glue layer doesn't depend on anything
+# which is arch-specific and that it compiles on all situations.
+#
+# We want to keep this requirement in order to be able to compile
+# the entire driver (with all its glue layers) on several architectures
+# and make sure it compiles fine. This will also help with allmodconfig
+# and allyesconfig builds.
+#
+# The only exception is the PCI glue layer, but that's only because
+# PCI doesn't provide nops if CONFIG_PCI isn't enabled.
+##
+
+obj-$(CONFIG_USB_DWC3)		+= dwc3-omap.o
+
+ifneq ($(CONFIG_PCI),)
+	obj-$(CONFIG_USB_DWC3)		+= dwc3-pci.o
+endif
+