42 static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,  in nuc900_dma_hw_params()  argument
45 	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));  in nuc900_dma_hw_params()
48 static void nuc900_update_dma_register(struct snd_pcm_substream *substream)  in nuc900_update_dma_register()  argument
50 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_update_dma_register()
54 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in nuc900_update_dma_register()
66 static void nuc900_dma_start(struct snd_pcm_substream *substream)  in nuc900_dma_start()  argument
68 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_start()
77 static void nuc900_dma_stop(struct snd_pcm_substream *substream)  in nuc900_dma_stop()  argument
79 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_stop()
90 	struct snd_pcm_substream *substream = dev_id;  in nuc900_dma_interrupt()  local
91 	struct nuc900_audio *nuc900_audio = substream->runtime->private_data;  in nuc900_dma_interrupt()
134 	snd_pcm_period_elapsed(substream);  in nuc900_dma_interrupt()
139 static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)  in nuc900_dma_hw_free()  argument
141 	snd_pcm_lib_free_pages(substream);  in nuc900_dma_hw_free()
145 static int nuc900_dma_prepare(struct snd_pcm_substream *substream)  in nuc900_dma_prepare()  argument
147 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_prepare()
154 	nuc900_update_dma_register(substream);  in nuc900_dma_prepare()
160 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in nuc900_dma_prepare()
170 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in nuc900_dma_prepare()
183 static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)  in nuc900_dma_trigger()  argument
190 		nuc900_dma_start(substream);  in nuc900_dma_trigger()
195 		nuc900_dma_stop(substream);  in nuc900_dma_trigger()
206 static int nuc900_dma_getposition(struct snd_pcm_substream *substream,  in nuc900_dma_getposition()  argument
209 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_getposition()
221 static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)  in nuc900_dma_pointer()  argument
223 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_pointer()
227 	nuc900_dma_getposition(substream, &src, &dst);  in nuc900_dma_pointer()
229 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)  in nuc900_dma_pointer()
234 	return bytes_to_frames(substream->runtime, res);  in nuc900_dma_pointer()
237 static int nuc900_dma_open(struct snd_pcm_substream *substream)  in nuc900_dma_open()  argument
239 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_open()
242 	snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);  in nuc900_dma_open()
247 			0, "nuc900-dma", substream))  in nuc900_dma_open()
255 static int nuc900_dma_close(struct snd_pcm_substream *substream)  in nuc900_dma_close()  argument
257 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_close()
260 	free_irq(nuc900_audio->irq_num, substream);  in nuc900_dma_close()
265 static int nuc900_dma_mmap(struct snd_pcm_substream *substream,  in nuc900_dma_mmap()  argument
268 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_mmap()
270 	return dma_mmap_writecombine(substream->pcm->card->dev, vma,  in nuc900_dma_mmap()