~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/firewire/bebob/bebob_yamaha_terratec.c

Version: ~ [ linux-5.7-rc7 ] ~ [ linux-5.6.14 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.42 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.124 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.181 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.224 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.224 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.84 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * bebob_yamaha.c - a part of driver for BeBoB based devices
  3  *
  4  * Copyright (c) 2013-2014 Takashi Sakamoto
  5  *
  6  * Licensed under the terms of the GNU General Public License, version 2.
  7  */
  8 
  9 #include "./bebob.h"
 10 
 11 /*
 12  * NOTE:
 13  * Yamaha GO44 is not designed to be used as stand-alone mixer. So any streams
 14  * must be accompanied. If changing the state, a LED on the device starts to
 15  * blink and its sync status is false. In this state, the device sounds nothing
 16  * even if streaming. To start streaming at the current sampling rate is only
 17  * way to recover this state. GO46 is better for stand-alone mixer.
 18  *
 19  * Both of them have a capability to change its sampling rate up to 192.0kHz.
 20  * At 192.0kHz, the device reports 4 PCM-in, 1 MIDI-in, 6 PCM-out, 1 MIDI-out.
 21  * But Yamaha's driver reduce 2 PCM-in, 1 MIDI-in, 2 PCM-out, 1 MIDI-out to use
 22  * 'Extended Stream Format Information Command - Single Request' in 'Additional
 23  * AVC commands' defined by BridgeCo.
 24  * This ALSA driver don't do this because a bit tiresome. Then isochronous
 25  * streaming with many asynchronous transactions brings sounds with noises.
 26  * Unfortunately current 'ffado-mixer' generated many asynchronous transaction
 27  * to observe device's state, mainly check cmp connection and signal format. I
 28  * recommend users to close ffado-mixer at 192.0kHz if mixer is needless.
 29  *
 30  * Terratec PHASE 24 FW and PHASE X24 FW are internally the same as
 31  * Yamaha GO 44 and GO 46. Yamaha and Terratec had cooperated for these models.
 32  */
 33 
 34 static const enum snd_bebob_clock_type clk_src_types[] = {
 35         SND_BEBOB_CLOCK_TYPE_INTERNAL,
 36         SND_BEBOB_CLOCK_TYPE_EXTERNAL,  /* S/PDIF */
 37 };
 38 static int
 39 clk_src_get(struct snd_bebob *bebob, unsigned int *id)
 40 {
 41         int err;
 42 
 43         err = avc_audio_get_selector(bebob->unit, 0, 4, id);
 44         if (err < 0)
 45                 return err;
 46 
 47         if (*id >= ARRAY_SIZE(clk_src_types))
 48                 return -EIO;
 49 
 50         return 0;
 51 }
 52 static const struct snd_bebob_clock_spec clock_spec = {
 53         .num    = ARRAY_SIZE(clk_src_types),
 54         .types  = clk_src_types,
 55         .get    = &clk_src_get,
 56 };
 57 static const struct snd_bebob_rate_spec rate_spec = {
 58         .get    = &snd_bebob_stream_get_rate,
 59         .set    = &snd_bebob_stream_set_rate,
 60 };
 61 const struct snd_bebob_spec yamaha_terratec_spec = {
 62         .clock  = &clock_spec,
 63         .rate   = &rate_spec,
 64         .meter  = NULL
 65 };
 66 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp