45 static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,  in nuc900_dma_hw_params()  argument
48 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_hw_params()
53 	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));  in nuc900_dma_hw_params()
59 	nuc900_audio->substream = substream;  in nuc900_dma_hw_params()
60 	nuc900_audio->dma_addr[substream->stream] = runtime->dma_addr;  in nuc900_dma_hw_params()
61 	nuc900_audio->buffersize[substream->stream] =  in nuc900_dma_hw_params()
69 static void nuc900_update_dma_register(struct snd_pcm_substream *substream,  in nuc900_update_dma_register()  argument
72 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_update_dma_register()
76 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in nuc900_update_dma_register()
88 static void nuc900_dma_start(struct snd_pcm_substream *substream)  in nuc900_dma_start()  argument
90 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_start()
99 static void nuc900_dma_stop(struct snd_pcm_substream *substream)  in nuc900_dma_stop()  argument
101 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_stop()
112 	struct snd_pcm_substream *substream = dev_id;  in nuc900_dma_interrupt()  local
113 	struct nuc900_audio *nuc900_audio = substream->runtime->private_data;  in nuc900_dma_interrupt()
156 	snd_pcm_period_elapsed(substream);  in nuc900_dma_interrupt()
161 static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)  in nuc900_dma_hw_free()  argument
163 	snd_pcm_lib_free_pages(substream);  in nuc900_dma_hw_free()
167 static int nuc900_dma_prepare(struct snd_pcm_substream *substream)  in nuc900_dma_prepare()  argument
169 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_prepare()
176 	nuc900_update_dma_register(substream,  in nuc900_dma_prepare()
177 				nuc900_audio->dma_addr[substream->stream],  in nuc900_dma_prepare()
178 				nuc900_audio->buffersize[substream->stream]);  in nuc900_dma_prepare()
184 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {  in nuc900_dma_prepare()
194 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in nuc900_dma_prepare()
207 static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)  in nuc900_dma_trigger()  argument
214 		nuc900_dma_start(substream);  in nuc900_dma_trigger()
219 		nuc900_dma_stop(substream);  in nuc900_dma_trigger()
230 static int nuc900_dma_getposition(struct snd_pcm_substream *substream,  in nuc900_dma_getposition()  argument
233 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_getposition()
245 static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)  in nuc900_dma_pointer()  argument
247 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_pointer()
251 	nuc900_dma_getposition(substream, &src, &dst);  in nuc900_dma_pointer()
253 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)  in nuc900_dma_pointer()
258 	return bytes_to_frames(substream->runtime, res);  in nuc900_dma_pointer()
261 static int nuc900_dma_open(struct snd_pcm_substream *substream)  in nuc900_dma_open()  argument
263 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_open()
266 	snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);  in nuc900_dma_open()
271 			0, "nuc900-dma", substream))  in nuc900_dma_open()
279 static int nuc900_dma_close(struct snd_pcm_substream *substream)  in nuc900_dma_close()  argument
281 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_close()
284 	free_irq(nuc900_audio->irq_num, substream);  in nuc900_dma_close()
289 static int nuc900_dma_mmap(struct snd_pcm_substream *substream,  in nuc900_dma_mmap()  argument
292 	struct snd_pcm_runtime *runtime = substream->runtime;  in nuc900_dma_mmap()
294 	return dma_mmap_writecombine(substream->pcm->card->dev, vma,  in nuc900_dma_mmap()