linux/sound/usb
Manuel Reinhardt a634090a0f ALSA: usb-audio: Add quirk for MOTU MicroBook II
Add an entry to the quirks-table to for usb-audio to recognize the
Microbook II (although it only exposes vendor interfaces). A simple boot
quirk is also implemented to set up the sample rate and  make sure that
no audio urbs are sent before the device is ready.

This patch only provides audio playback and capture at 96kHz sample
rate. Notice the following shortcomings:

- The sample rate is currently hardcoded to 96k although the device also
  supports 48k and 44.1k.

- The various mixer controls of the MicroBook are not made available.

- The keep-iface control should be on by default because the device
  shuts down whenever the altsetting is reset which is usually unwanted.
  (I don't know the best way to do this)

- The communication format used by the MicroBook for sample rate setting
  and also other setup has been reverse engineered by looking at the
  usbmon output while running the windows driver through virtualbox. In
  this patch the first byte of every message is set to \0 while in the
  observed communications the first byte acts as a "message-counter"
  increasing its value with every message sent. Leaving it at \0 does
  not seem to affect the device.

Signed-off-by: Manuel Reinhardt <manuel.rhdt@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-02-28 22:23:11 +01:00
..
6fire ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
bcd2000 sound updates for 4.15-rc1 2017-11-14 18:01:46 -08:00
caiaq ALSA: caiaq: Add fall-through annotation 2018-10-12 09:31:26 +02:00
hiface ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
line6 Merge branch 'topic/pcm-device-suspend' into for-next 2019-01-18 17:37:21 +01:00
misc ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
usx2y ALSA: usb: Drop superfluous PCM preallocation error checks 2019-02-06 10:29:42 +01:00
Kconfig ALSA: us122l: enable compile testing 2017-05-15 11:02:14 +02:00
Makefile ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
card.c Merge branch 'topic/pcm-device-suspend' into for-next 2019-01-18 17:37:21 +01:00
card.h ALSA: usb-audio: Expose sample resolution through proc interface 2019-02-18 09:36:09 +01:00
clock.c ALSA: usb-audio: Allow changing from a bad sample rate 2018-07-19 08:44:46 +02:00
clock.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
endpoint.c ALSA: usb-audio: remove redundant pointer 'urb' 2018-08-01 14:00:32 +02:00
endpoint.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
format.c ALSA: usb-audio: Expose sample resolution through proc interface 2019-02-18 09:36:09 +01:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c ALSA: usb-audio: correct speed checking 2016-05-08 11:42:04 +02:00
helper.h ALSA: usb-audio: Drop superfluous ifndef 2018-05-24 11:19:42 +02:00
midi.c ALSA: rawmidi: A lightweight function to discard pending bytes 2018-10-04 20:13:17 +02:00
midi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer.c ALSA: usb: Clean up with new procfs helpers 2019-02-06 18:11:57 +01:00
mixer.h ALSA: usb-audio: Declare the common variable in header file 2018-07-26 08:32:00 +02:00
mixer_maps.c ALSA: usb: add UAC3 BADD profiles support 2018-05-13 08:54:35 +02:00
mixer_quirks.c ALSA: usb: Clean up with new procfs helpers 2019-02-06 18:11:57 +01:00
mixer_quirks.h ALSA: usb-audio: Initialize Dell Dock playback volumes 2018-05-02 16:02:32 +02:00
mixer_scarlett.c ALSA: usb-audio: Clean up mixer element list traverse 2018-05-03 12:35:19 +02:00
mixer_scarlett.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_us16x08.c ALSA: usb: Avoid VLA in mixer_us16x08.c 2017-05-31 08:46:19 +02:00
mixer_us16x08.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm.c ALSA: usb-audio: Add quirk for MOTU MicroBook II 2019-02-28 22:23:11 +01:00
pcm.h ALSA: usb-audio: Add UAC3 Power Domains to suspend/resume 2018-07-31 15:01:36 +02:00
power.c ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
power.h ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
proc.c ALSA: usb-audio: Expose sample resolution through proc interface 2019-02-18 09:36:09 +01:00
proc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks-table.h ALSA: usb-audio: Add quirk for MOTU MicroBook II 2019-02-28 22:23:11 +01:00
quirks.c ALSA: usb-audio: Add quirk for MOTU MicroBook II 2019-02-28 22:23:11 +01:00
quirks.h ALSA: usb-audio: move audioformat quirks to quirks.c 2018-03-19 17:00:12 +01:00
stream.c ALSA: usb-audio: Always check descriptor sizes in parser code 2019-01-07 11:10:17 +01:00
stream.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbaudio.h ALSA: usb-audio: Allow non-vmalloc buffer for PCM buffers 2018-05-29 10:01:54 +02:00