[34-longterm 122/196] USB: teach "devices" file about Wireless and SuperSpeed USB

[Paul Gortmaker <paul.gortmaker@windriver.com>]

From: Alan Stern <stern@rowland.harvard.edu>

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.
                   -------------------

commit 834e2312e7a384877a876b0d34dffc3046c96bcb upstream.

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: Alan Stern <stern@rowland.harvard.edu>
CC: David Vrabel <david.vrabel@csr.com>
CC: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
 Documentation/usb/proc_usb_info.txt |   34 ++++++++++++++++++++++------------
 drivers/usb/core/devices.c          |   11 +++++++----
 2 files changed, 29 insertions(+), 16 deletions(-)

diff --git a/Documentation/usb/proc_usb_info.txt b/Documentation/usb/proc_usb_info.txt
index fafcd47..afe596d 100644
--- a/Documentation/usb/proc_usb_info.txt
+++ b/Documentation/usb/proc_usb_info.txt
@@ -1,12 +1,17 @@
 /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
@@ -106,8 +111,8 @@ Legend:
 
 Topology info:
 
-T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=ddd MxCh=dd
-|   |      |      |       |       |      |        |       |__MaxChildren
+T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd
+|   |      |      |       |       |      |        |        |__MaxChildren
 |   |      |      |       |       |      |        |__Device Speed in Mbps
 |   |      |      |       |       |      |__DeviceNumber
 |   |      |      |       |       |__Count of devices at this level
@@ -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
@@ -291,7 +301,7 @@ Here's an example, from a system which has a UHCI root hub,
 an external hub connected to the root hub, and a mouse and
 a serial converter connected to the external hub.
 
-T:  Bus=00 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
+T:  Bus=00 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 2
 B:  Alloc= 28/900 us ( 3%), #Int=  2, #Iso=  0
 D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
 P:  Vendor=0000 ProdID=0000 Rev= 0.00
@@ -301,21 +311,21 @@ C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
 I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
 E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
 
-T:  Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 4
+T:  Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 4
 D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
 P:  Vendor=0451 ProdID=1446 Rev= 1.00
 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
 I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
 E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=255ms
 
-T:  Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  3 Spd=1.5 MxCh= 0
+T:  Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  3 Spd=1.5  MxCh= 0
 D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
 P:  Vendor=04b4 ProdID=0001 Rev= 0.00
 C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
 I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=mouse
 E:  Ad=81(I) Atr=03(Int.) MxPS=   3 Ivl= 10ms
 
-T:  Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#=  4 Spd=12  MxCh= 0
+T:  Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#=  4 Spd=12   MxCh= 0
 D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
 P:  Vendor=0565 ProdID=0001 Rev= 1.08
 S:  Manufacturer=Peracom Networks, Inc.
@@ -330,12 +340,12 @@ E:  Ad=82(I) Atr=03(Int.) MxPS=   8 Ivl=  8ms
 Selecting only the "T:" and "I:" lines from this (for example, by using
 "procusb ti"), we have:
 
-T:  Bus=00 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
-T:  Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 4
+T:  Bus=00 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 2
+T:  Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 4
 I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
-T:  Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  3 Spd=1.5 MxCh= 0
+T:  Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  3 Spd=1.5  MxCh= 0
 I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=mouse
-T:  Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#=  4 Spd=12  MxCh= 0
+T:  Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#=  4 Spd=12   MxCh= 0
 I:  If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=serial
 
 
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 7013296..0ce4230 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -65,8 +65,8 @@
 #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 */
@@ -518,11 +518,14 @@ 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,
-- 
1.7.9.3