/* 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;
}
/* Stop and release duplex streams */
void line6_pcm_release(struct snd_line6_pcm *line6pcm, int type)
{
struct line6_pcm_stream *pstr;
int dir;
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++)
line6_stream_stop(line6pcm, dir, type);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
line6_buffer_release(line6pcm, pstr, type);
}
mutex_unlock(&line6pcm->state_mutex);
}
