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USB: indicate active altsetting in proc/bus/usb/devices file 

Update /proc/bus/usb/devices output to report active altsettings.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2006-12-13 13:07:10 -08:00 committed by Greg Kroah-Hartman
parent 316547fdfa
commit 2360e4aa64
2 changed files with 17 additions and 12 deletions
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21
Documentation/usb/proc_usb_info.txt
View File

@ -213,15 +213,16 @@ C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA
Interface descriptor info (can be multiple per Config): Interface descriptor info (can be multiple per Config):
I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss I:* If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
| | | | | | | |__Driver name | | | | | | | | |__Driver name
| | | | | | | or "(none)" | | | | | | | | or "(none)"
| | | | | | |__InterfaceProtocol | | | | | | | |__InterfaceProtocol
| | | | | |__InterfaceSubClass | | | | | | |__InterfaceSubClass
| | | | |__InterfaceClass | | | | | |__InterfaceClass
| | | |__NumberOfEndpoints | | | | |__NumberOfEndpoints
| | |__AlternateSettingNumber | | | |__AlternateSettingNumber
| |__InterfaceNumber | | |__InterfaceNumber
| |__ "*" indicates the active altsetting (others are " ")
|__Interface info tag |__Interface info tag
A given interface may have one or more "alternate" settings. A given interface may have one or more "alternate" settings.
@ -277,7 +278,7 @@ of the USB devices on a system's root hub. (See more below
on how to do this.) on how to do this.)
The Interface lines can be used to determine what driver is 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 The Configuration lines could be used to list maximum power
(in milliamps) that a system's USB devices are using. (in milliamps) that a system's USB devices are using.

8
drivers/usb/core/devices.c
View File

@ -104,7 +104,7 @@ static const char *format_config =
static const char *format_iface = static const char *format_iface =
/* I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=xxxx*/ /* 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 = static const char *format_endpt =
/* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */ /* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */
@ -242,15 +242,19 @@ static char *usb_dump_interface_descriptor(char *start, char *end,
{ {
const struct usb_interface_descriptor *desc = &intfc->altsetting[setno].desc; const struct usb_interface_descriptor *desc = &intfc->altsetting[setno].desc;
const char *driver_name = ""; const char *driver_name = "";
int active = 0;
if (start > end) if (start > end)
return start; return start;
down_read(&usb_bus_type.subsys.rwsem); down_read(&usb_bus_type.subsys.rwsem);
if (iface) if (iface) {
driver_name = (iface->dev.driver driver_name = (iface->dev.driver
? iface->dev.driver->name ? iface->dev.driver->name
: "(none)"); : "(none)");
active = (desc == &iface->cur_altsetting->desc);
}
start += sprintf(start, format_iface, start += sprintf(start, format_iface,
active ? '*' : ' ', /* mark active altsetting */
desc->bInterfaceNumber, desc->bInterfaceNumber,
desc->bAlternateSetting, desc->bAlternateSetting,
desc->bNumEndpoints, desc->bNumEndpoints,