/* close callback */
static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream)
{
/* the hardware-specific codes will be here */
struct bcm2835_chip *chip;
struct snd_pcm_runtime *runtime;
struct bcm2835_alsa_stream *alsa_stream;
audio_info(" .. IN\n");
chip = snd_pcm_substream_chip(substream);
if (mutex_lock_interruptible(&chip->audio_mutex)) {
audio_error("Interrupted whilst waiting for lock\n");
return -EINTR;
}
runtime = substream->runtime;
alsa_stream = runtime->private_data;
audio_info("Alsa close\n");
/*
* Call stop if it's still running. This happens when app
* is force killed and we don't get a stop trigger.
*/
if (alsa_stream->running) {
int err;
err = bcm2835_audio_stop(alsa_stream);
alsa_stream->running = 0;
if (err)
audio_error(" Failed to STOP alsa device\n");
}
alsa_stream->period_size = 0;
alsa_stream->buffer_size = 0;
if (alsa_stream->open) {
alsa_stream->open = 0;
bcm2835_audio_close(alsa_stream);
}
if (alsa_stream->chip)
alsa_stream->chip->alsa_stream[alsa_stream->idx] = NULL;
/*
* Do not free up alsa_stream here, it will be freed up by
* runtime->private_free callback we registered in *_open above
*/
chip->opened &= ~(1 << substream->number);
mutex_unlock(&chip->audio_mutex);
audio_info(" .. OUT\n");
return 0;
}
/* close callback */
static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream)
{
/* the hardware-specific codes will be here */
struct snd_pcm_runtime *runtime = substream->runtime;
bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
audio_info(" .. IN\n");
audio_warning("Alsa close\n");
/*
* Call stop if it's still running. This happens when app
* is force killed and we don't get a stop trigger.
*/
if (alsa_stream->running) {
int err;
err = bcm2835_audio_stop(alsa_stream);
alsa_stream->running = 0;
if (err != 0)
audio_error(" Failed to STOP alsa device\n");
}
alsa_stream->period_size = 0;
alsa_stream->buffer_size = 0;
if (alsa_stream->open) {
alsa_stream->open = 0;
bcm2835_audio_close(alsa_stream);
}
if (alsa_stream->chip)
alsa_stream->chip->alsa_stream[alsa_stream->idx] = NULL;
/*
* Do not free up alsa_stream here, it will be freed up by
* runtime->private_free callback we registered in *_open above
*/
audio_info(" .. OUT\n");
return 0;
}
