Added driverfs support for the USB subsystem.

drivers/usb/hcd/ehci-hcd.c

@@ -277,7 +277,7 @@ static int ehci_start (struct usb_hcd *hcd)
 	 */
 	usb_connect (udev);
 	udev->speed = USB_SPEED_HIGH;
-	if (usb_new_device (udev) != 0) {
+	if (usb_register_root_hub (udev, &ehci->hcd.pdev->dev) != 0) {
 		if (hcd->state == USB_STATE_RUNNING)
 			ehci_ready (ehci);
 		while (readl (&ehci->regs->status) & (STS_ASS | STS_PSS))

drivers/usb/hcd/ohci-hcd.c

@@ -469,7 +469,7 @@ static int hc_start (struct ohci_hcd *ohci)
 
 	usb_connect (udev);
 	udev->speed = USB_SPEED_FULL;
-	if (usb_new_device (udev) != 0) {
+	if (usb_register_root_hub (udev, &ohci->hcd.pdev->dev) != 0) {
 		usb_free_dev (udev); 
 		ohci->disabled = 1;
 // FIXME cleanup

drivers/usb/hub.c

@@ -721,6 +721,20 @@ static void usb_hub_port_connect_change(struct usb_hub *hubstate, int port,
 		info("new USB device on bus %d path %s, assigned address %d",
 			dev->bus->busnum, dev->devpath, dev->devnum);
 
+		/* put the device in the global device tree */
+		dev->dev.parent = &dev->parent->dev;
+		sprintf (&dev->dev.name[0], "USB device %04x:%04x",
+			 dev->descriptor.idVendor,
+			 dev->descriptor.idProduct);
+		/* find the number of the port this device is connected to */
+		sprintf (&dev->dev.bus_id[0], "unknown_port_%03d", dev->devnum);
+		for (i = 0; i < USB_MAXCHILDREN; ++i) {
+			if (dev->parent->children[i] == dev) {
+				sprintf (&dev->dev.bus_id[0], "%02d", i);
+				break;
+			}
+		}
+
 		/* Run it through the hoops (find a driver, etc) */
 		if (!usb_new_device(dev))
 			goto done;

drivers/usb/uhci.c

@@ -2842,7 +2842,7 @@ static int alloc_uhci(struct pci_dev *dev, unsigned int io_addr, unsigned int io
 
 	usb_connect(uhci->rh.dev);
 
-	if (usb_new_device(uhci->rh.dev) != 0) {
+	if (usb_register_root_hub(uhci->rh.dev, &dev->dev) != 0) {
 		err("unable to start root hub");
 		retval = -ENOMEM;
 		goto err_start_root_hub;

drivers/usb/usb-ohci.c

@@ -2231,7 +2231,7 @@ static int hc_start (ohci_t * ohci)
 	dev = usb_to_ohci (usb_dev);
 	ohci->bus->root_hub = usb_dev;
 	usb_connect (usb_dev);
-	if (usb_new_device (usb_dev) != 0) {
+	if (usb_register_root_hub (usb_dev, &ohci->ohci_dev->dev) != 0) {
 		usb_free_dev (usb_dev); 
 		ohci->disabled = 1;
 		return -ENODEV;

drivers/usb/usb-uhci.c

@@ -2907,7 +2907,7 @@ _static int __init uhci_start_usb (uhci_t *s)
 	s->bus->root_hub = usb_dev;
 	usb_connect (usb_dev);
 
-	if (usb_new_device (usb_dev) != 0) {
+	if (usb_register_root_hub (usb_dev, &s->uhci_pci->dev) != 0) {
 		usb_free_dev (usb_dev);
 		return -1;
 	}

drivers/usb/usb.c

@@ -980,8 +980,16 @@ static void usb_find_drivers(struct usb_device *dev)
 	unsigned claimed = 0;
 
 	for (ifnum = 0; ifnum < dev->actconfig->bNumInterfaces; ifnum++) {
+		struct usb_interface *interface = &dev->actconfig->interface[ifnum];
+		
+		/* register this interface with driverfs */
+		interface->dev.parent = &dev->dev;
+		sprintf (&interface->dev.bus_id[0], "%03d", ifnum);
+		sprintf (&interface->dev.name[0], "figure out some name...");
+		device_register (&interface->dev);
+
 		/* if this interface hasn't already been claimed */
-		if (!usb_interface_claimed(dev->actconfig->interface + ifnum)) {
+		if (!usb_interface_claimed(interface)) {
 			if (usb_find_interface_driver(dev, ifnum))
 				rejected++;
 			else
@@ -1969,8 +1977,10 @@ void usb_disconnect(struct usb_device **pdev)
 				if (driver->owner)
 					__MOD_DEC_USE_COUNT(driver->owner);
 				/* if driver->disconnect didn't release the interface */
-				if (interface->driver)
+				if (interface->driver) {
+					put_device (&interface->dev);
 					usb_driver_release_interface(driver, interface);
+				}
 			}
 		}
 	}
@@ -1989,6 +1999,7 @@ void usb_disconnect(struct usb_device **pdev)
 	if (dev->devnum > 0) {
 		clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
 		usbfs_remove_device(dev);
+		put_device(&dev->dev);
 	}
 
 	/* Free up the device itself */
@@ -2715,6 +2726,11 @@ int usb_new_device(struct usb_device *dev)
 		usb_show_string(dev, "SerialNumber", dev->descriptor.iSerialNumber);
 #endif
 
+	/* register this device in the driverfs tree */
+	err = device_register (&dev->dev);
+	if (err)
+		return err;
+
 	/* now that the basic setup is over, add a /proc/bus/usb entry */
 	usbfs_add_device(dev);
 
@@ -2727,6 +2743,29 @@ int usb_new_device(struct usb_device *dev)
 	return 0;
 }
 
+/**
+ * usb_register_root_hub - called by a usb host controller to register the root hub device in the system
+ * @usb_dev: the usb root hub device to be registered.
+ * @parent_dev: the parent device of this root hub.
+ *
+ * The USB host controller calls this function to register the root hub
+ * properly with the USB subsystem.  It sets up the device properly in
+ * the driverfs tree, and then calls usb_new_device() to register the
+ * usb device.
+ */
+int usb_register_root_hub (struct usb_device *usb_dev, struct device *parent_dev)
+{
+	int retval;
+
+	usb_dev->dev.parent = parent_dev;
+	strcpy (&usb_dev->dev.name[0], "usb_name");
+	strcpy (&usb_dev->dev.bus_id[0], "usb_bus");
+	retval = usb_new_device (usb_dev);
+	if (retval)
+		put_device (&usb_dev->dev);
+	return retval;
+}
+
 static int usb_open(struct inode * inode, struct file * file)
 {
 	int minor = minor(inode->i_rdev);
@@ -2832,6 +2871,7 @@ EXPORT_SYMBOL(usb_alloc_bus);
 EXPORT_SYMBOL(usb_free_bus);
 EXPORT_SYMBOL(usb_register_bus);
 EXPORT_SYMBOL(usb_deregister_bus);
+EXPORT_SYMBOL(usb_register_root_hub);
 EXPORT_SYMBOL(usb_alloc_dev);
 EXPORT_SYMBOL(usb_free_dev);
 EXPORT_SYMBOL(usb_inc_dev_use);

include/linux/usb.h

 #ifndef __LINUX_USB_H
 #define __LINUX_USB_H
 
+#include <linux/device.h>
+
 /* USB constants */
 
 /*
@@ -260,6 +262,7 @@ struct usb_interface {
 	int max_altsetting;             /* total memory allocated */
  
 	struct usb_driver *driver;	/* driver */
+	struct device dev;		/* interface specific device info */
 	void *private_data;
 };
 
@@ -945,6 +948,7 @@ extern struct usb_bus *usb_alloc_bus(struct usb_operations *);
 extern void usb_free_bus(struct usb_bus *);
 extern void usb_register_bus(struct usb_bus *);
 extern void usb_deregister_bus(struct usb_bus *);
+extern int usb_register_root_hub(struct usb_device *usb_dev, struct device *parent_dev);
 
 extern int usb_check_bandwidth (struct usb_device *dev, struct urb *urb);
 extern void usb_claim_bandwidth (struct usb_device *dev, struct urb *urb,
@@ -1041,6 +1045,8 @@ struct usb_device {
 	struct usb_device *parent;
 	struct usb_bus *bus;		/* Bus we're part of */
 
+	struct device dev;		/* Generic device interface */
+
 	struct usb_device_descriptor descriptor;/* Descriptor */
 	struct usb_config_descriptor *config;	/* All of the configs */
 	struct usb_config_descriptor *actconfig;/* the active configuration */