On Tuesday 12 December 2006 3:18 pm, Zhang Daniel wrote:
> Hi,
> Thanks Dave. Following is what I got by cat /proc/bus/usb/devices.
Darn, I forgot that nobody ever fixed the bug where it doesn't show
the active configuration. I append a patch (untested) that ought
to resolve that problem.
> The device is Logitech Pro 5000 webcam (one camera). The driver is
> uvcvideo. The application is luvcview. The command is ./luvcview -f yuv -s
> 640x480.
>
> Maybe Laurent (author of UVC driver) can join us also.
>
> I appreciate all the help.
>
> Daniel Zhang
>
> T: Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 8
> B: Alloc=616/800 us (77%), #Int= 0, #Iso= 5
> D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS= 8 #Cfgs= 1
> P: Vendor=0000 ProdID=0000 Rev= 2.06
> S: Manufacturer=Linux 2.6.13-15-smp ehci_hcd
This is a bit old, so it might help to try a newer kernel.
Also, to try a newer kernel with the experimental EHCI scheduling
patches Alan mentioned.
> S: Product=EHCI Host Controller
> S: SerialNumber=0000:00:1d.7
> C:* #Ifs= 1 Cfg#= 1 Atr=e0 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= 2 Ivl=256ms
>
> T: Bus=05 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 10 Spd=480 MxCh= 0
> D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
> P: Vendor=046d ProdID=08c5 Rev= 0.05
> C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=500mA
> I: If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=01 Prot=00 Driver=uvcvideo
> E: Ad=87(I) Atr=03(Int.) MxPS= 16 Ivl=16ms
> I: If#= 1 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> I: If#= 1 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 192 Ivl=125us
> I: If#= 1 Alt= 2 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 384 Ivl=125us
> I: If#= 1 Alt= 3 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 512 Ivl=125us
> I: If#= 1 Alt= 4 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 640 Ivl=125us
> I: If#= 1 Alt= 5 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 800 Ivl=125us
> I: If#= 1 Alt= 6 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS= 944 Ivl=125us
> I: If#= 1 Alt= 7 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS=1280 Ivl=125us
> I: If#= 1 Alt= 8 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS=1600 Ivl=125us
> I: If#= 1 Alt= 9 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS=1984 Ivl=125us
> I: If#= 1 Alt=10 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS=2688 Ivl=125us
> I: If#= 1 Alt=11 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=00 Driver=uvcvideo
> E: Ad=81(I) Atr=01(Isoc) MxPS=3060 Ivl=125us
I'd assume the problem case is when you're using one of those last
few settings ... probably the very last one, just shy of 30 MByte/sec.
> I: If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
> I: If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
> I: If#= 3 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
> E: Ad=86(I) Atr=05(Isoc) MxPS= 16 Ivl=1ms
> I: If#= 3 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
> E: Ad=86(I) Atr=05(Isoc) MxPS= 32 Ivl=1ms
> I: If#= 3 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
> E: Ad=86(I) Atr=05(Isoc) MxPS= 48 Ivl=1ms
>
Update /proc/bus/usb/devices output to report active altsettings.
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Index: g26/drivers/usb/core/devices.c
===================================================================
--- g26.orig/drivers/usb/core/devices.c 2006-12-07 23:00:34.000000000 -0800
+++ g26/drivers/usb/core/devices.c 2006-12-13 13:01:19.000000000 -0800
@@ -104,7 +104,7 @@ static const char *format_config =
static const char *format_iface =
/* I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=xxxx*/
- "I: If#=%2d Alt=%2d #EPs=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x Driver=%s\n";
+ "I:%c If#=%2d Alt=%2d #EPs=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x
Driver=%s\n";
static const char *format_endpt =
/* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */
@@ -242,15 +242,19 @@ static char *usb_dump_interface_descript
{
const struct usb_interface_descriptor *desc =
&intfc->altsetting[setno].desc;
const char *driver_name = "";
+ int active = 0;
if (start > end)
return start;
down_read(&usb_bus_type.subsys.rwsem);
- if (iface)
+ if (iface) {
driver_name = (iface->dev.driver
? iface->dev.driver->name
: "(none)");
+ active = (desc == &iface->cur_altsetting->desc);
+ }
start += sprintf(start, format_iface,
+ active ? '*' : ' ', /* mark active altsetting */
desc->bInterfaceNumber,
desc->bAlternateSetting,
desc->bNumEndpoints,
Index: g26/Documentation/usb/proc_usb_info.txt
===================================================================
--- g26.orig/Documentation/usb/proc_usb_info.txt 2006-08-04
10:29:50.000000000 -0700
+++ g26/Documentation/usb/proc_usb_info.txt 2006-12-13 13:00:05.000000000
-0800
@@ -213,15 +213,16 @@ C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA
Interface descriptor info (can be multiple per Config):
-I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
-| | | | | | | |__Driver name
-| | | | | | | or "(none)"
-| | | | | | |__InterfaceProtocol
-| | | | | |__InterfaceSubClass
-| | | | |__InterfaceClass
-| | | |__NumberOfEndpoints
-| | |__AlternateSettingNumber
-| |__InterfaceNumber
+I:* If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
+| | | | | | | | |__Driver name
+| | | | | | | | or "(none)"
+| | | | | | | |__InterfaceProtocol
+| | | | | | |__InterfaceSubClass
+| | | | | |__InterfaceClass
+| | | | |__NumberOfEndpoints
+| | | |__AlternateSettingNumber
+| | |__InterfaceNumber
+| |__ "*" indicates the active altsetting (others are " ")
|__Interface info tag
A given interface may have one or more "alternate" settings.
@@ -277,7 +278,7 @@ of the USB devices on a system's root hu
on how to do this.)
The Interface lines can be used to determine what driver is
-being used for each device.
+being used for each device, and which altsetting it activated.
The Configuration lines could be used to list maximum power
(in milliamps) that a system's USB devices are using.
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