vc04_services/bcm2835-audio/bcm2835-pcm.c

55 	struct snd_pcm_substream *substream = alsa_stream->substream;
62 		snd_pcm_stream_lock(substream);
63 		snd_pcm_stop(substream,
67 		snd_pcm_stream_unlock(substream);
80 		snd_pcm_period_elapsed(substream);
85 static int snd_bcm2835_playback_open_generic(struct snd_pcm_substream *substream, int spdif)
87 	struct bcm2835_chip *chip = snd_pcm_substream_chip(substream);
88 	struct snd_pcm_runtime *runtime = substream->runtime;
94 	idx = substream->number;
105 			"substream(%d) device doesn't exist max(%d) substreams allowed\n",
119 	alsa_stream->substream = substream;
157 static int snd_bcm2835_playback_open(struct snd_pcm_substream *substream)
159 	return snd_bcm2835_playback_open_generic(substream, 0);
162 static int snd_bcm2835_playback_spdif_open(struct snd_pcm_substream *substream)
164 	return snd_bcm2835_playback_open_generic(substream, 1);
167 static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream)
173 	chip = snd_pcm_substream_chip(substream);
175 	runtime = substream->runtime;
188 	chip->opened &= ~(1 << substream->number);
195 static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream)
197 	struct bcm2835_chip *chip = snd_pcm_substream_chip(substream);
198 	struct snd_pcm_runtime *runtime = substream->runtime;
222 		snd_pcm_lib_buffer_bytes(substream);
224 	alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream);
225 	alsa_stream->period_size = snd_pcm_lib_period_bytes(substream);
234 static void snd_bcm2835_pcm_transfer(struct snd_pcm_substream *substream,
237 	struct snd_pcm_runtime *runtime = substream->runtime;
239 	void *src = (void *)(substream->runtime->dma_area + rec->sw_data);
244 static int snd_bcm2835_pcm_ack(struct snd_pcm_substream *substream)
246 	struct snd_pcm_runtime *runtime = substream->runtime;
250 	return snd_pcm_indirect_playback_transfer(substream, pcm_indirect,
255 static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
257 	struct snd_pcm_runtime *runtime = substream->runtime;
275 snd_bcm2835_pcm_pointer(struct snd_pcm_substream *substream)
277 	struct snd_pcm_runtime *runtime = substream->runtime;
298 	return snd_pcm_indirect_playback_pointer(substream,