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  1. Jan 11, 2018
  3. Dec 12, 2017
  5. Dec 11, 2017
  7. Dec 08, 2017
  9. Oct 12, 2017
  11. Jun 19, 2017
    • Ruslan Bilovol's avatar
      usb: gadget: add f_uac1 variant based on a new u_audio api · 0591bc23
      Ruslan Bilovol authored 
      

This patch adds a new function 'f_uac1'
(f_uac1 with virtual "ALSA card") that
uses recently created u_audio API. Comparing
to legacy f_uac1 function implementation it
doesn't require any real Audio codec to be
present on the device. In f_uac1 audio
streams are simply sinked to and sourced
from a virtual ALSA sound card created
using u_audio API.

Legacy f_uac1 approach is to write audio
samples directly to existing ALSA sound
card

f_uac1 approach is more generic/flexible
one - create an ALSA sound card that
represents USB Audio function and allows to
be used by userspace application that
may choose to do whatever it wants with the
data received from the USB Host and choose
to provide whatever it wants as audio data
to the USB Host.

f_uac1 also has capture support (gadget->host)
thanks to easy implementation via u_audio.
By default, capture interface has 48000kHz/2ch
configuration, same as playback channel has.

f_uac1 descriptors naming convention
uses f_uac2 driver naming convention that
makes it more common and meaningful.

Comparing to f_uac1_legacy, the f_uac1 doesn't
have volume/mute functionality. This is because
the f_uac1 volume/mute feature unit was dummy
implementation since that driver creation (2009)
and never had any real volume control or mute
functionality, so there is no any difference
here.

Since f_uac1 functionality, exposed
interface to userspace (virtual ALSA card),
input parameters are so different comparing
to f_uac1_legacy, that there is no any
reason to keep them in the same file/module,
and separate function was created.

g_audio can be built using one of existing
UAC functions (f_uac1, f_uac1_legacy or f_uac2)

Signed-off-by: default avatarRuslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      0591bc23
    • Ruslan Bilovol's avatar
      usb: gadget: function: make current f_uac1 implementation legacy · d355339e
      Ruslan Bilovol authored 
      

Before introducing new f_uac1 function (with virtual
ALSA card) make current implementation legacy.

This includes renaming of existing files, some
variables, config options and documentation

Signed-off-by: default avatarRuslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      d355339e
  13. Jun 02, 2017
  15. May 17, 2017
    • Markus Heiser's avatar
      doc-rst: fixed kernel-doc directives in usb/typec.rst · 5383fae7
      Markus Heiser authored 
      

Even if this file is not yet included in any toctree, it is parsed by
Sphinx since it is named '.rst'. This patch fixes the following two
ERRORs from Sphinx build:

Documentation/usb/typec.rst:116: ERROR: Error in "kernel-doc" directive:
invalid option block.

.. kernel-doc:: drivers/usb/typec/typec.c
   :functions: typec_register_cable typec_unregister_cable typec_register_plug
   typec_unregister_plug

Documentation/usb/typec.rst:139: ERROR: Error in "kernel-doc" directive:
invalid option block.

.. kernel-doc:: drivers/usb/typec/typec.c
   :functions: typec_set_data_role typec_set_pwr_role typec_set_vconn_role
   typec_set_pwr_opmode

Signed-off-by: default avatarMarkus Heiser <markus.heiser@darmarit.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      5383fae7
  17. Apr 20, 2017
  19. Apr 11, 2017
  21. Mar 23, 2017
  23. Mar 21, 2017
  25. Jan 26, 2017
  27. Jan 24, 2017
    • Peter Chen's avatar
      usb: gadget: uac2: add req_number as parameter · e92b9d44
      Peter Chen authored 
      

There are only two requests for uac2, it may not be enough at high
loading system which usb interrupt handler can't be serviced on
time, then the data will be lost since it is isoc transfer for audio.

In this patch, we introduce a parameter for the number for usb request,
and the user can override it if current number for request is not enough
for his/her use case.

Besides, update this parameter for legacy audio gadget and documentation.

Signed-off-by: default avatarPeter Chen <peter.chen@nxp.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      e92b9d44
  29. Jun 23, 2016
  31. May 04, 2016
  33. Apr 15, 2016
  35. Apr 13, 2016
  37. Mar 05, 2016
    • Reilly Grant's avatar
      usb: devio: Add ioctl to disallow detaching kernel USB drivers. · d883f52e
      Reilly Grant authored 
      

The new USBDEVFS_DROP_PRIVILEGES ioctl allows a process to voluntarily
relinquish the ability to issue other ioctls that may interfere with
other processes and drivers that have claimed an interface on the
device.

This commit also includes a simple utility to be able to test the
ioctl, located at Documentation/usb/usbdevfs-drop-permissions.c

Example (with qemu-kvm's input device):

    $ lsusb
    ...
    Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd

    $ usb-devices
    ...
    C:  #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
    I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=02 Driver=usbhid

    $ sudo ./usbdevfs-drop-permissions /dev/bus/usb/001/002
    OK: privileges dropped!
    Available options:
    [0] Exit now
    [1] Reset device. Should fail if device is in use
    [2] Claim 4 interfaces. Should succeed where not in use
    [3] Narrow interface permission mask
    Which option shall I run?: 1
    ERROR: USBDEVFS_RESET failed! (1 - Operation not permitted)
    Which test shall I run next?: 2
    ERROR claiming if 0 (1 - Operation not permitted)
    ERROR claiming if 1 (1 - Operation not permitted)
    ERROR claiming if 2 (1 - Operation not permitted)
    ERROR claiming if 3 (1 - Operation not permitted)
    Which test shall I run next?: 0

After unbinding usbhid:

    $ usb-devices
    ...
    I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=02 Driver=(none)

    $ sudo ./usbdevfs-drop-permissions /dev/bus/usb/001/002
    ...
    Which option shall I run?: 2
    OK: claimed if 0
    ERROR claiming if 1 (1 - Operation not permitted)
    ERROR claiming if 2 (1 - Operation not permitted)
    ERROR claiming if 3 (1 - Operation not permitted)
    Which test shall I run next?: 1
    OK: USBDEVFS_RESET succeeded
    Which test shall I run next?: 0

After unbinding usbhid and restricting the mask:

    $ sudo ./usbdevfs-drop-permissions /dev/bus/usb/001/002
    ...
    Which option shall I run?: 3
    Insert new mask: 0
    OK: privileges dropped!
    Which test shall I run next?: 2
    ERROR claiming if 0 (1 - Operation not permitted)
    ERROR claiming if 1 (1 - Operation not permitted)
    ERROR claiming if 2 (1 - Operation not permitted)
    ERROR claiming if 3 (1 - Operation not permitted)

Signed-off-by: default avatarReilly Grant <reillyg@chromium.org>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarEmilio López <emilio.lopez@collabora.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d883f52e
  39. Mar 04, 2016
  41. Dec 24, 2015
  43. Dec 16, 2015
  45. Dec 15, 2015
  47. Dec 01, 2015
    • Lu Baolu's avatar
      usb: core: lpm: fix usb3_hardware_lpm sysfs node · bf5ce5bf
      Lu Baolu authored 
      

Commit 655fe4ef ("usbcore: add sysfs support to xHCI usb3
hardware LPM") introduced usb3_hardware_lpm sysfs node. This
doesn't show the correct status of USB3 U1 and U2 LPM status.

This patch fixes this by replacing usb3_hardware_lpm with two
nodes, usb3_hardware_lpm_u1 (for U1) and usb3_hardware_lpm_u2
(for U2), and recording the U1/U2 LPM status in right places.

This patch should be back-ported to kernels as old as 4.3,
that contains Commit 655fe4ef ("usbcore: add sysfs support
to xHCI usb3 hardware LPM").

Cc: stable@vger.kernel.org
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      bf5ce5bf
  49. Sep 22, 2015
  51. Aug 18, 2015
  53. Aug 14, 2015
  55. Jul 31, 2015
  57. Jul 22, 2015