mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
ff231db811
When adding the ID of a composite device dynamically to a driver, all hitherto unbound interfaces are bound to this driver regardless of their class, which may not be intended. The patch adds the option to tell the targeted interface class to a driver via the "new_id" attribute, in addition to the device ID. Also, it appends the ABI documentation accordingly. Example: $ echo "1234 2a2a ff" >/sys/bus/usb-serial/drivers/option1/new_id will bind only vendor-specific interfaces to the 3G driver. Signed-off-by: Josua Dietze <digidietze@draisberghof.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
185 lines
6.7 KiB
Plaintext
185 lines
6.7 KiB
Plaintext
What: /sys/bus/usb/devices/.../power/autosuspend
|
|
Date: March 2007
|
|
KernelVersion: 2.6.21
|
|
Contact: Alan Stern <stern@rowland.harvard.edu>
|
|
Description:
|
|
Each USB device directory will contain a file named
|
|
power/autosuspend. This file holds the time (in seconds)
|
|
the device must be idle before it will be autosuspended.
|
|
0 means the device will be autosuspended as soon as
|
|
possible. Negative values will prevent the device from
|
|
being autosuspended at all, and writing a negative value
|
|
will resume the device if it is already suspended.
|
|
|
|
The autosuspend delay for newly-created devices is set to
|
|
the value of the usbcore.autosuspend module parameter.
|
|
|
|
What: /sys/bus/usb/devices/.../power/persist
|
|
Date: May 2007
|
|
KernelVersion: 2.6.23
|
|
Contact: Alan Stern <stern@rowland.harvard.edu>
|
|
Description:
|
|
If CONFIG_USB_PERSIST is set, then each USB device directory
|
|
will contain a file named power/persist. The file holds a
|
|
boolean value (0 or 1) indicating whether or not the
|
|
"USB-Persist" facility is enabled for the device. Since the
|
|
facility is inherently dangerous, it is disabled by default
|
|
for all devices except hubs. For more information, see
|
|
Documentation/usb/persist.txt.
|
|
|
|
What: /sys/bus/usb/device/.../power/connected_duration
|
|
Date: January 2008
|
|
KernelVersion: 2.6.25
|
|
Contact: Sarah Sharp <sarah.a.sharp@intel.com>
|
|
Description:
|
|
If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file
|
|
is present. When read, it returns the total time (in msec)
|
|
that the USB device has been connected to the machine. This
|
|
file is read-only.
|
|
Users:
|
|
PowerTOP <power@bughost.org>
|
|
http://www.lesswatts.org/projects/powertop/
|
|
|
|
What: /sys/bus/usb/device/.../power/active_duration
|
|
Date: January 2008
|
|
KernelVersion: 2.6.25
|
|
Contact: Sarah Sharp <sarah.a.sharp@intel.com>
|
|
Description:
|
|
If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file
|
|
is present. When read, it returns the total time (in msec)
|
|
that the USB device has been active, i.e. not in a suspended
|
|
state. This file is read-only.
|
|
|
|
Tools can use this file and the connected_duration file to
|
|
compute the percentage of time that a device has been active.
|
|
For example,
|
|
echo $((100 * `cat active_duration` / `cat connected_duration`))
|
|
will give an integer percentage. Note that this does not
|
|
account for counter wrap.
|
|
Users:
|
|
PowerTOP <power@bughost.org>
|
|
http://www.lesswatts.org/projects/powertop/
|
|
|
|
What: /sys/bus/usb/device/<busnum>-<devnum>...:<config num>-<interface num>/supports_autosuspend
|
|
Date: January 2008
|
|
KernelVersion: 2.6.27
|
|
Contact: Sarah Sharp <sarah.a.sharp@intel.com>
|
|
Description:
|
|
When read, this file returns 1 if the interface driver
|
|
for this interface supports autosuspend. It also
|
|
returns 1 if no driver has claimed this interface, as an
|
|
unclaimed interface will not stop the device from being
|
|
autosuspended if all other interface drivers are idle.
|
|
The file returns 0 if autosuspend support has not been
|
|
added to the driver.
|
|
Users:
|
|
USB PM tool
|
|
git://git.moblin.org/users/sarah/usb-pm-tool/
|
|
|
|
What: /sys/bus/usb/device/.../authorized
|
|
Date: July 2008
|
|
KernelVersion: 2.6.26
|
|
Contact: David Vrabel <david.vrabel@csr.com>
|
|
Description:
|
|
Authorized devices are available for use by device
|
|
drivers, non-authorized one are not. By default, wired
|
|
USB devices are authorized.
|
|
|
|
Certified Wireless USB devices are not authorized
|
|
initially and should be (by writing 1) after the
|
|
device has been authenticated.
|
|
|
|
What: /sys/bus/usb/device/.../wusb_cdid
|
|
Date: July 2008
|
|
KernelVersion: 2.6.27
|
|
Contact: David Vrabel <david.vrabel@csr.com>
|
|
Description:
|
|
For Certified Wireless USB devices only.
|
|
|
|
A devices's CDID, as 16 space-separated hex octets.
|
|
|
|
What: /sys/bus/usb/device/.../wusb_ck
|
|
Date: July 2008
|
|
KernelVersion: 2.6.27
|
|
Contact: David Vrabel <david.vrabel@csr.com>
|
|
Description:
|
|
For Certified Wireless USB devices only.
|
|
|
|
Write the device's connection key (CK) to start the
|
|
authentication of the device. The CK is 16
|
|
space-separated hex octets.
|
|
|
|
What: /sys/bus/usb/device/.../wusb_disconnect
|
|
Date: July 2008
|
|
KernelVersion: 2.6.27
|
|
Contact: David Vrabel <david.vrabel@csr.com>
|
|
Description:
|
|
For Certified Wireless USB devices only.
|
|
|
|
Write a 1 to force the device to disconnect
|
|
(equivalent to unplugging a wired USB device).
|
|
|
|
What: /sys/bus/usb/drivers/.../new_id
|
|
Date: October 2011
|
|
Contact: linux-usb@vger.kernel.org
|
|
Description:
|
|
Writing a device ID to this file will attempt to
|
|
dynamically add a new device ID to a USB device driver.
|
|
This may allow the driver to support more hardware than
|
|
was included in the driver's static device ID support
|
|
table at compile time. The format for the device ID is:
|
|
idVendor idProduct bInterfaceClass.
|
|
The vendor ID and device ID fields are required, the
|
|
interface class is optional.
|
|
Upon successfully adding an ID, the driver will probe
|
|
for the device and attempt to bind to it. For example:
|
|
# echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id
|
|
|
|
What: /sys/bus/usb-serial/drivers/.../new_id
|
|
Date: October 2011
|
|
Contact: linux-usb@vger.kernel.org
|
|
Description:
|
|
For serial USB drivers, this attribute appears under the
|
|
extra bus folder "usb-serial" in sysfs; apart from that
|
|
difference, all descriptions from the entry
|
|
"/sys/bus/usb/drivers/.../new_id" apply.
|
|
|
|
What: /sys/bus/usb/drivers/.../remove_id
|
|
Date: November 2009
|
|
Contact: CHENG Renquan <rqcheng@smu.edu.sg>
|
|
Description:
|
|
Writing a device ID to this file will remove an ID
|
|
that was dynamically added via the new_id sysfs entry.
|
|
The format for the device ID is:
|
|
idVendor idProduct. After successfully
|
|
removing an ID, the driver will no longer support the
|
|
device. This is useful to ensure auto probing won't
|
|
match the driver to the device. For example:
|
|
# echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id
|
|
|
|
What: /sys/bus/usb/device/.../avoid_reset_quirk
|
|
Date: December 2009
|
|
Contact: Oliver Neukum <oliver@neukum.org>
|
|
Description:
|
|
Writing 1 to this file tells the kernel that this
|
|
device will morph into another mode when it is reset.
|
|
Drivers will not use reset for error handling for
|
|
such devices.
|
|
Users:
|
|
usb_modeswitch
|
|
|
|
What: /sys/bus/usb/devices/.../power/usb2_hardware_lpm
|
|
Date: September 2011
|
|
Contact: Andiry Xu <andiry.xu@amd.com>
|
|
Description:
|
|
If CONFIG_USB_SUSPEND is set and a USB 2.0 lpm-capable device
|
|
is plugged in to a xHCI host which support link PM, it will
|
|
perform a LPM test; if the test is passed and host supports
|
|
USB2 hardware LPM (xHCI 1.0 feature), USB2 hardware LPM will
|
|
be enabled for the device and the USB device directory will
|
|
contain a file named power/usb2_hardware_lpm. The file holds
|
|
a string value (enable or disable) indicating whether or not
|
|
USB2 hardware LPM is enabled for the device. Developer can
|
|
write y/Y/1 or n/N/0 to the file to enable/disable the
|
|
feature.
|