/* common PCM trigger callback */
int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
struct snd_pcm_substream *s;
int err;
clear_bit(LINE6_FLAG_PREPARED, &line6pcm->flags);
snd_pcm_group_for_each_entry(s, substream) {
if (s->pcm->card != substream->pcm->card)
continue;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
if (s->stream == SNDRV_PCM_STREAM_CAPTURE &&
(line6pcm->line6->properties->capabilities &
LINE6_CAP_IN_NEEDS_OUT)) {
err = line6_stream_start(line6pcm, SNDRV_PCM_STREAM_PLAYBACK,
LINE6_STREAM_CAPTURE_HELPER);
if (err < 0)
return err;
}
err = line6_stream_start(line6pcm, s->stream,
LINE6_STREAM_PCM);
if (err < 0)
return err;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
if (s->stream == SNDRV_PCM_STREAM_CAPTURE &&
(line6pcm->line6->properties->capabilities &
LINE6_CAP_IN_NEEDS_OUT)) {
line6_stream_stop(line6pcm, SNDRV_PCM_STREAM_PLAYBACK,
LINE6_STREAM_CAPTURE_HELPER);
}
line6_stream_stop(line6pcm, s->stream,
LINE6_STREAM_PCM);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -EINVAL;
set_bit(LINE6_FLAG_PAUSE_PLAYBACK, &line6pcm->flags);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -EINVAL;
clear_bit(LINE6_FLAG_PAUSE_PLAYBACK, &line6pcm->flags);
break;
default:
return -EINVAL;
}
}
return 0;
}
/* Acquire and start duplex streams:
* type is either LINE6_STREAM_IMPULSE or LINE6_STREAM_MONITOR
*/
int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type)
{
struct line6_pcm_stream *pstr;
int ret = 0, dir;
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
ret = line6_buffer_acquire(line6pcm, pstr, type);
if (ret < 0)
goto error;
if (!pstr->running)
line6_wait_clear_audio_urbs(line6pcm, pstr);
}
for (dir = 0; dir < 2; dir++) {
ret = line6_stream_start(line6pcm, dir, type);
if (ret < 0)
goto error;
}
error:
mutex_unlock(&line6pcm->state_mutex);
if (ret < 0)
line6_pcm_release(line6pcm, type);
return ret;
}
/* Acquire and optionally start duplex streams:
* type is either LINE6_STREAM_IMPULSE or LINE6_STREAM_MONITOR
*/
int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type, bool start)
{
struct line6_pcm_stream *pstr;
int ret = 0, dir;
/* TODO: We should assert SNDRV_PCM_STREAM_PLAYBACK/CAPTURE == 0/1 */
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
ret = line6_buffer_acquire(line6pcm, pstr, dir, type);
if (ret < 0)
goto error;
if (!pstr->running)
line6_wait_clear_audio_urbs(line6pcm, pstr);
}
if (start) {
for (dir = 0; dir < 2; dir++) {
ret = line6_stream_start(line6pcm, dir, type);
if (ret < 0)
goto error;
}
}
error:
mutex_unlock(&line6pcm->state_mutex);
if (ret < 0)
line6_pcm_release(line6pcm, type);
return ret;
}
