3  * tegra_pcm.c - Tegra PCM driver
21 #include <sound/pcm.h>
106 			"dmaengine pcm open failed with err %d (%s)\n", ret,  in tegra_pcm_open()
204 	return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,  in tegra_pcm_mmap()
216 static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream,  in tegra_pcm_preallocate_dma_buffer()  argument
219 	struct snd_pcm_substream *substream = pcm->streams[stream].substream;  in tegra_pcm_preallocate_dma_buffer()
222 	buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL);  in tegra_pcm_preallocate_dma_buffer()
228 	buf->dev.dev = pcm->card->dev;  in tegra_pcm_preallocate_dma_buffer()
234 static void tegra_pcm_deallocate_dma_buffer(struct snd_pcm *pcm, int stream)  in tegra_pcm_deallocate_dma_buffer()  argument
239 	substream = pcm->streams[stream].substream;  in tegra_pcm_deallocate_dma_buffer()
247 	dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr);  in tegra_pcm_deallocate_dma_buffer()
255 	struct snd_pcm *pcm = rtd->pcm;  in tegra_pcm_dma_allocate()  local
266 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {  in tegra_pcm_dma_allocate()
267 		ret = tegra_pcm_preallocate_dma_buffer(pcm,  in tegra_pcm_dma_allocate()
273 	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {  in tegra_pcm_dma_allocate()
274 		ret = tegra_pcm_preallocate_dma_buffer(pcm,  in tegra_pcm_dma_allocate()
283 	tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);  in tegra_pcm_dma_allocate()
296 			struct snd_pcm *pcm)  in tegra_pcm_destruct()  argument
298 	tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);  in tegra_pcm_destruct()
299 	tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);  in tegra_pcm_destruct()
304 MODULE_DESCRIPTION("Tegra PCM ASoC driver");