Add dwc_otg driver

Signed-off-by: popcornmix <popcornmix@gmail.com>

drivers/usb/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_USB_U132_HCD)	+= host/
 obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
 obj-$(CONFIG_USB_HWA_HCD)	+= host/
 obj-$(CONFIG_USB_ISP1760_HCD)	+= host/
+obj-$(CONFIG_USB_DWCOTG)	+= host/
 obj-$(CONFIG_USB_IMX21_HCD)	+= host/
 obj-$(CONFIG_USB_FSL_MPH_DR_OF)	+= host/
 

drivers/usb/core/generic.c

@@ -149,6 +149,7 @@ int usb_choose_configuration(struct usb_device *udev)
 		dev_warn(&udev->dev,
 			"no configuration chosen from %d choice%s\n",
 			num_configs, plural(num_configs));
+		dev_warn(&udev->dev, "No support over %dmA\n", udev->bus_mA);
 	}
 	return i;
 }

drivers/usb/core/hub.c

@@ -1071,6 +1071,8 @@ static int hub_configure(struct usb_hub *hub,
 	INIT_WORK(&hub->tt.clear_work, hub_tt_work);
 	switch (hdev->descriptor.bDeviceProtocol) {
 		case 0:
+			dev_dbg(hub_dev, "TT with no hub-specific protocol - "
+				"no TT\n");
 			break;
 		case 1:
 			dev_dbg(hub_dev, "Single TT\n");
@@ -1087,6 +1089,7 @@ static int hub_configure(struct usb_hub *hub,
 			hub->tt.hub = hdev;
 			break;
 		case 3:
+			dev_dbg(hub_dev, "USB 3.0 hub - no TT\n");
 			/* USB 3.0 hubs don't have a TT */
 			break;
 		default:
@@ -1724,6 +1727,12 @@ static inline void announce_device(struct usb_device *udev) { }
 #endif
 
 #ifdef	CONFIG_USB_OTG
+
+static int enable_whitelist;
+module_param(enable_whitelist, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(enable_whitelist,
+		 "only recognize devices in OTG whitelist if true");
+
 #include "otg_whitelist.h"
 #endif
 
@@ -1778,9 +1787,15 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
 					dev_info(&udev->dev,
 						"can't set HNP mode: %d\n",
 						err);
+					dev_printk(KERN_CRIT, &udev->dev,
+						"Not Connected/Responding\n");
+
 					bus->b_hnp_enable = 0;
+				} else {
+					dev_info(&udev->dev,
+						"HNP Not Supported\n");
 				}
-			}
+                        }
 		}
 	}
 
@@ -1789,12 +1804,27 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
 		/* Maybe it can talk to us, though we can't talk to it.
 		 * (Includes HNP test device.)
 		 */
-		if (udev->bus->b_hnp_enable || udev->bus->is_b_host) {
+		if (udev->bus->b_hnp_enable || udev->bus->is_b_host ||
+		    udev->descriptor.idVendor == 0x1a0a) {
 			err = usb_port_suspend(udev, PMSG_SUSPEND);
-			if (err < 0)
+			if (err < 0) {
 				dev_dbg(&udev->dev, "HNP fail, %d\n", err);
+			} else {
+			    /* Return Connection Refused(ECONNREFUSED)
+			     * instead of No Device(ENODEV) so that the
+			     * retry loop in hub_port_connect_change() is
+			     * exited without disabling the port
+			     */
+			    err = -ECONNREFUSED;
+			    goto fail;
+			}
 		}
-		err = -ENOTSUPP;
+		//err = -ENOTSUPP;
+		/* Return Not Connected (ENOTCONN) instead of No
+		 * Device(ENODEV) so that the retry loop in
+		 * hub_port_connect_change() is exited
+		 */
+		err = -ENOTCONN;
 		goto fail;
 	}
 fail:
@@ -2377,8 +2407,8 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
 			status = 0;
 	} else {
 		/* device has up to 10 msec to fully suspend */
-		dev_dbg(&udev->dev, "usb %ssuspend\n",
-				(msg.event & PM_EVENT_AUTO ? "auto-" : ""));
+//		dev_dbg(&udev->dev, "usb %ssuspend\n",
+//				(msg.event & PM_EVENT_AUTO ? "auto-" : ""));
 		usb_set_device_state(udev, USB_STATE_SUSPENDED);
 		msleep(10);
 	}
@@ -2932,7 +2962,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 				buf->bMaxPacketSize0 = 0;
 				r = usb_control_msg(udev, usb_rcvaddr0pipe(),
 					USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
-					USB_DT_DEVICE << 8, 0,
+					USB_DT_DEVICE << 8,
+					//USB_DT_DEVICE << 64, // DWC patch suggestion!
+					0,
 					buf, GET_DESCRIPTOR_BUFSIZE,
 					initial_descriptor_timeout);
 				switch (buf->bMaxPacketSize0) {
@@ -3353,8 +3385,10 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
 		release_devnum(udev);
 		hub_free_dev(udev);
 		usb_put_dev(udev);
-		if ((status == -ENOTCONN) || (status == -ENOTSUPP))
-			break;
+		if (status == -ENOTCONN || status == -ENOTSUPP ||
+			status == -ECONNREFUSED)
+			// break; //DWC patch
+			return;
 	}
 	if (hub->hdev->parent ||
 			!hcd->driver->port_handed_over ||

drivers/usb/core/message.c

@@ -1836,6 +1836,85 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 	if (cp->string == NULL &&
 			!(dev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
 		cp->string = usb_cache_string(dev, cp->desc.iConfiguration);
+/* Uncomment this define to enable the HS Electrical Test support */
+#define DWC_HS_ELECT_TST 1
+#ifdef DWC_HS_ELECT_TST
+		/* Here we implement the HS Electrical Test support. The
+		 * tester uses a vendor ID of 0x1A0A to indicate we should
+		 * run a special test sequence. The product ID tells us
+		 * which sequence to run. We invoke the test sequence by
+		 * sending a non-standard SetFeature command to our root
+		 * hub port. Our dwc_otg_hcd_hub_control() routine will
+		 * recognize the command and perform the desired test
+		 * sequence.
+		 */
+		if (dev->descriptor.idVendor == 0x1A0A) {
+			/* HSOTG Electrical Test */
+			dev_warn(&dev->dev, "VID from HSOTG Electrical Test Fixture\n");
+
+			if (dev->bus && dev->bus->root_hub) {
+				struct usb_device *hdev = dev->bus->root_hub;
+				dev_warn(&dev->dev, "Got PID 0x%x\n", dev->descriptor.idProduct);
+
+				switch (dev->descriptor.idProduct) {
+				case 0x0101:	/* TEST_SE0_NAK */
+					dev_warn(&dev->dev, "TEST_SE0_NAK\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x300, NULL, 0, HZ);
+					break;
+
+				case 0x0102:	/* TEST_J */
+					dev_warn(&dev->dev, "TEST_J\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x100, NULL, 0, HZ);
+					break;
+
+				case 0x0103:	/* TEST_K */
+					dev_warn(&dev->dev, "TEST_K\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x200, NULL, 0, HZ);
+					break;
+
+				case 0x0104:	/* TEST_PACKET */
+					dev_warn(&dev->dev, "TEST_PACKET\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x400, NULL, 0, HZ);
+					break;
+
+				case 0x0105:	/* TEST_FORCE_ENABLE */
+					dev_warn(&dev->dev, "TEST_FORCE_ENABLE\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x500, NULL, 0, HZ);
+					break;
+
+				case 0x0106:	/* HS_HOST_PORT_SUSPEND_RESUME */
+					dev_warn(&dev->dev, "HS_HOST_PORT_SUSPEND_RESUME\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x600, NULL, 0, 40 * HZ);
+					break;
+
+				case 0x0107:	/* SINGLE_STEP_GET_DEVICE_DESCRIPTOR setup */
+					dev_warn(&dev->dev, "SINGLE_STEP_GET_DEVICE_DESCRIPTOR setup\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x700, NULL, 0, 40 * HZ);
+					break;
+
+				case 0x0108:	/* SINGLE_STEP_GET_DEVICE_DESCRIPTOR execute */
+					dev_warn(&dev->dev, "SINGLE_STEP_GET_DEVICE_DESCRIPTOR execute\n");
+					usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+							USB_REQ_SET_FEATURE, USB_RT_PORT,
+							USB_PORT_FEAT_TEST, 0x800, NULL, 0, 40 * HZ);
+				}
+			}
+		}
+#endif /* DWC_HS_ELECT_TST */
 
 	/* Now that all the interfaces are set up, register them
 	 * to trigger binding of drivers to interfaces.  probe()