USB: teach "devices" file about Wireless and SuperSpeed USB

The /sys/kernel/debug/usb/devices file doesn't know about Wireless or
SuperSpeed USB.  This patch (as1416b) teaches it, and updates the
Documentation/usb/proc_sub_info.txt file accordingly.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
CC: David Vrabel <david.vrabel@csr.com>
CC: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Documentation/usb/proc_usb_info.txt

 /proc/bus/usb filesystem output
 ===============================
-(version 2003.05.30)
+(version 2010.09.13)
 
 
 The usbfs filesystem for USB devices is traditionally mounted at
 /proc/bus/usb.  It provides the /proc/bus/usb/devices file, as well as
 the /proc/bus/usb/BBB/DDD files.
 
+In many modern systems the usbfs filsystem isn't used at all.  Instead
+USB device nodes are created under /dev/usb/ or someplace similar.  The
+"devices" file is available in debugfs, typically as
+/sys/kernel/debug/usb/devices.
+
 
 **NOTE**: If /proc/bus/usb appears empty, and a host controller
 	  driver has been linked, then you need to mount the
@@ -106,7 +111,7 @@ Legend:
 
 Topology info:
 
-T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd
+T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd
 |   |      |      |       |       |      |        |        |__MaxChildren
 |   |      |      |       |       |      |        |__Device Speed in Mbps
 |   |      |      |       |       |      |__DeviceNumber
@@ -120,8 +125,13 @@ T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd
     Speed may be:
     	1.5	Mbit/s for low speed USB
 	12	Mbit/s for full speed USB
-	480	Mbit/s for high speed USB (added for USB 2.0)
+	480	Mbit/s for high speed USB (added for USB 2.0);
+		  also used for Wireless USB, which has no fixed speed
+	5000	Mbit/s for SuperSpeed USB (added for USB 3.0)
 
+    For reasons lost in the mists of time, the Port number is always
+    too low by 1.  For example, a device plugged into port 4 will
+    show up with "Port=03".
 
 Bandwidth info:
 B:  Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd

drivers/usb/core/devices.c

@@ -66,8 +66,8 @@
 #define ALLOW_SERIAL_NUMBER
 
 static const char *format_topo =
-/* T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd */
-"\nT:  Bus=%2.2d Lev=%2.2d Prnt=%2.2d Port=%2.2d Cnt=%2.2d Dev#=%3d Spd=%3s MxCh=%2d\n";
+/* T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd */
+"\nT:  Bus=%2.2d Lev=%2.2d Prnt=%2.2d Port=%2.2d Cnt=%2.2d Dev#=%3d Spd=%-4s MxCh=%2d\n";
 
 static const char *format_string_manufacturer =
 /* S:  Manufacturer=xxxx */
@@ -520,11 +520,14 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
 		speed = "1.5"; break;
 	case USB_SPEED_UNKNOWN:		/* usb 1.1 root hub code */
 	case USB_SPEED_FULL:
-		speed = "12 "; break;
+		speed = "12"; break;
+	case USB_SPEED_WIRELESS:	/* Wireless has no real fixed speed */
 	case USB_SPEED_HIGH:
 		speed = "480"; break;
+	case USB_SPEED_SUPER:
+		speed = "5000"; break;
 	default:
-		speed = "?? ";
+		speed = "??";
 	}
 	data_end = pages_start + sprintf(pages_start, format_topo,
 			bus->busnum, level, parent_devnum,