[PATCH] [34/98] USB: teach "devices" file about Wireless and SuperSpeed USB

Andi Kleen
2011-07-27T00:35:37Z

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

commit 834e2312e7a384877a876b0d34dffc3046c96bcb upstream.

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: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
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>
[Julien Blache: The original commit also added the correct speed for
USB_SPEED_WIRELESS, I removed it as it's not supported in 2.6.32.]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
Documentation/usb/proc_usb_info.txt | 36 +++++++++++++++++++++++-------------
drivers/usb/core/devices.c | 10 ++++++----
2 files changed, 29 insertions(+), 17 deletions(-)

Index: linux-2.6.35.y/Documentation/usb/proc_usb_info.txt
===================================================================
--- linux-2.6.35.y.orig/Documentation/usb/proc_usb_info.txt
+++ linux-2.6.35.y/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
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 h
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=
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

Index: linux-2.6.35.y/drivers/usb/core/devices.c
===================================================================
--- linux-2.6.35.y.orig/drivers/usb/core/devices.c
+++ linux-2.6.35.y/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 */
@@ -521,11 +521,13 @@ static ssize_t usb_device_dump(char __us
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_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,