linux.git/drivers/usb/core/sysfs.c, branch v2.6.24

USB: keep track of whether interface sysfs files exist

2007-11-28T21:58:35+00:00

This patch (as1009) solves the problem of multiple registrations for
USB sysfs files in a more satisfying way than the existing code.  It
simply adds a flag to keep track of whether or not the files have been
created; that way the files can be created or removed as needed.

Signed-off-by: Alan Stern

USB: Export URB statistics for powertop

2007-10-12T21:55:30+00:00

powertop currently tracks interrupts generated by uhci, ehci, and ohci,
but it has no way of telling which USB device to blame USB bus activity on.
This patch exports the number of URBs that are submitted for a given device.
Cat the file 'urbnum' in /sys/bus/usb/devices/.../

Signed-off-by: Sarah Sharp 
Signed-off-by: Greg Kroah-Hartman

usb: hook up device authorization to sysfs

2007-10-12T21:55:08+00:00

Makes it possible to control the authorization of USB devices through
sysfs's /sys/usb/devices/*/authorize.

Update: per Adrian Bunk's suggestion, make dev_attr_authorized_default static

Signed-off-by: Inaky Perez-Gonzalez 
Signed-off-by: Greg Kroah-Hartman

USB: add "descriptors" binary sysfs attribute

2007-07-20T00:46:04+00:00

This patch (as934) adds a new readonly binary sysfs attribute file
called "descriptors" for each USB device.  The attribute contains the
device descriptor followed by the raw descriptor entry (config plug
subsidiary descriptors) for the current configuration.

Having this information available in fixed-format binary makes life a
lot easier for user programs by avoiding the need to open, read, and
parse multiple sysfs text files.

The information in this attribute file is much like that in usbfs's
device file, but there are some significant differences:

	The 2-byte fields in the device descriptor are left in
	little-endian byte order, as they appear on the bus and
	in the kernel.

	Only one raw descriptor set is presented, that of the
	current configuration.

	Opening this file will not cause a suspended device to be
	autoresumed.

The last item in particular should be a big selling point for libusb,
which currently forces all USB devices to be resumed as it scans the
device tree.

Signed-off-by: Alan Stern 
Cc: Dave Mielke 
Signed-off-by: Greg Kroah-Hartman

USB: add IAD support to usbfs and sysfs

2007-07-12T23:34:40+00:00

USB_IAD: Adds support for USB Interface Association Descriptors.

This patch adds support to the USB host stack for parsing, storing, and
displaying Interface Association Descriptors. In /proc/bus/usb/devices
lines starting with A: show the fields in an IAD. In sysfs if an
interface on a USB device is referenced by an IAD the following files
will be added to the sysfs directory for that interface:
iad_bFirstInterface, iad_bInterfaceCount, iad_bFunctionClass, and
iad_bFunctionSubClass, iad_bFunctionProtocol

Signed-off-by: Craig W. Nadler 
Signed-off-by: Greg Kroah-Hartman

USB: add power/persist device attribute

2007-07-12T23:34:30+00:00

This patch (as920) adds an extra level of protection to the
USB-Persist facility.  Now it will apply by default only to hubs; for
all other devices the user must enable it explicitly by setting the
power/persist device attribute.

The disconnect_all_children() routine in hub.c has been removed and
its code placed inline.  This is the way it was originally as part of
hub_pre_reset(); the revised usage in hub_reset_resume() is
sufficiently different that the code can no longer be shared.
Likewise, mark_children_for_reset() is now inline as part of
hub_reset_resume().  The end result looks much cleaner than before.

The sysfs interface is updated to add the new attribute file, and
there are corresponding documentation updates.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: handle errors in power/level attribute

2007-05-23T06:45:50+00:00

This patch (as906) improves the error handling for the USB power/level
attribute file.  If an error occurs, the original power-level settings
will be restored.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: add "busnum" attribute for USB devices

2007-04-27T20:28:42+00:00

This patch (as903) adds a "busnum" sysfs attribute for USB devices.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: add power/level sysfs attribute

2007-04-27T20:28:37+00:00

This patch (as874) adds another piece to the user-visible part of the
USB autosuspend interface.  The new power/level sysfs attribute allows
users to force the device on (with autosuspend off), force the device
to sleep (with autoresume off), or return to normal automatic operation.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: Allow autosuspend delay to equal 0

2007-04-27T20:28:35+00:00

This patch (as867) adds an entry for the new power/autosuspend
attribute in Documentation/ABI/testing, and it changes the behavior of
the delay value.  Now a delay of 0 means to autosuspend as soon as
possible, and negative values will prevent autosuspend.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman