static void snd_bcm2835_pcm_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, size_t bytes)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
void *src = (void *) (substream->runtime->dma_area + rec->sw_data);
int err;
err = bcm2835_audio_write(alsa_stream, bytes, src);
if (err)
audio_error(" Failed to transfer to alsa device (%d)\n", err);
}
static int snd_bcm2835_pcm_copy(struct snd_pcm_substream *substream,
int channel, snd_pcm_uframes_t pos, void *src,
snd_pcm_uframes_t count)
{
int ret;
struct snd_pcm_runtime *runtime = substream->runtime;
bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
audio_info(" .. IN\n");
audio_debug("copy.......... (%d) hwptr=%d appl=%d pos=%d\n",
frames_to_bytes(runtime, count), frames_to_bytes(runtime,
runtime->
status->
hw_ptr),
frames_to_bytes(runtime, runtime->control->appl_ptr),
alsa_stream->pos);
ret =
bcm2835_audio_write(alsa_stream, frames_to_bytes(runtime, count),
src);
audio_info(" .. OUT\n");
return ret;
}