/* common PCM hw_params callback */
int snd_line6_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
int ret;
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
struct line6_pcm_stream *pstr = get_stream(line6pcm, substream->stream);
mutex_lock(&line6pcm->state_mutex);
ret = line6_buffer_acquire(line6pcm, pstr, substream->stream,
LINE6_STREAM_PCM);
if (ret < 0)
goto error;
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
if (ret < 0) {
line6_buffer_release(line6pcm, pstr, LINE6_STREAM_PCM);
goto error;
}
pstr->period = params_period_bytes(hw_params);
error:
mutex_unlock(&line6pcm->state_mutex);
return ret;
}
/* common PCM hw_free callback */
int snd_line6_hw_free(struct snd_pcm_substream *substream)
{
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
struct line6_pcm_stream *pstr = get_stream(line6pcm, substream->stream);
mutex_lock(&line6pcm->state_mutex);
line6_buffer_release(line6pcm, pstr, LINE6_STREAM_PCM);
mutex_unlock(&line6pcm->state_mutex);
return snd_pcm_lib_free_pages(substream);
}
/* 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);
}
