10 #include <sound/pcm.h>
24 static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,  in dmaengine_dma_dev()  argument
27 	if (!pcm->chan[substream->stream])  in dmaengine_dma_dev()
30 	return pcm->chan[substream->stream]->device->dev;  in dmaengine_dma_dev()
35  * @substream: PCM substream
76 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_hw_params()  local
86 	if (!pcm->config)  in dmaengine_pcm_hw_params()
89 		prepare_slave_config = pcm->config->prepare_slave_config;  in dmaengine_pcm_hw_params()
109 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_set_runtime_hwparams()  local
110 	struct device *dma_dev = dmaengine_dma_dev(pcm, substream);  in dmaengine_pcm_set_runtime_hwparams()
111 	struct dma_chan *chan = pcm->chan[substream->stream];  in dmaengine_pcm_set_runtime_hwparams()
121 	if (pcm->config && pcm->config->pcm_hardware)  in dmaengine_pcm_set_runtime_hwparams()
123 				pcm->config->pcm_hardware);  in dmaengine_pcm_set_runtime_hwparams()
137 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_RESIDUE)  in dmaengine_pcm_set_runtime_hwparams()
156 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_open()  local
157 	struct dma_chan *chan = pcm->chan[substream->stream];  in dmaengine_pcm_open()
184 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_compat_request_channel()  local
196 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])  in dmaengine_pcm_compat_request_channel()
197 		return pcm->chan[0];  in dmaengine_pcm_compat_request_channel()
199 	if (pcm->config && pcm->config->compat_request_channel)  in dmaengine_pcm_compat_request_channel()
200 		return pcm->config->compat_request_channel(rtd, substream);  in dmaengine_pcm_compat_request_channel()
202 	if (pcm->config)  in dmaengine_pcm_compat_request_channel()
203 		fn = pcm->config->compat_filter_fn;  in dmaengine_pcm_compat_request_channel()
230 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_new()  local
231 	const struct snd_dmaengine_pcm_config *config = pcm->config;  in dmaengine_pcm_new()
247 		substream = rtd->pcm->streams[i].substream;  in dmaengine_pcm_new()
251 		if (!pcm->chan[i] && config && config->chan_names[i])  in dmaengine_pcm_new()
252 			pcm->chan[i] = dma_request_slave_channel(dev,  in dmaengine_pcm_new()
255 		if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {  in dmaengine_pcm_new()
256 			pcm->chan[i] = dmaengine_pcm_compat_request_channel(  in dmaengine_pcm_new()
260 		if (!pcm->chan[i]) {  in dmaengine_pcm_new()
268 				dmaengine_dma_dev(pcm, substream),  in dmaengine_pcm_new()
272 		if (!dmaengine_pcm_can_report_residue(dev, pcm->chan[i]))  in dmaengine_pcm_new()
273 			pcm->flags |= SND_DMAENGINE_PCM_FLAG_NO_RESIDUE;  in dmaengine_pcm_new()
275 		if (rtd->pcm->streams[i].pcm->name[0] == '\0') {  in dmaengine_pcm_new()
276 			strscpy_pad(rtd->pcm->streams[i].pcm->name,  in dmaengine_pcm_new()
277 				    rtd->pcm->streams[i].pcm->id,  in dmaengine_pcm_new()
278 				    sizeof(rtd->pcm->streams[i].pcm->name));  in dmaengine_pcm_new()
289 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_pointer()  local
291 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_RESIDUE)  in dmaengine_pcm_pointer()
303 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_copy_user()  local
306 		       void *buf, unsigned long bytes) = pcm->config->process;  in dmaengine_copy_user()
357 static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,  in dmaengine_pcm_request_chan_of()  argument
364 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || (!dev->of_node &&  in dmaengine_pcm_request_chan_of()
381 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
396 			pcm->chan[i] = NULL;  in dmaengine_pcm_request_chan_of()
398 			pcm->chan[i] = chan;  in dmaengine_pcm_request_chan_of()
400 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
404 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
405 		pcm->chan[1] = pcm->chan[0];  in dmaengine_pcm_request_chan_of()
410 static void dmaengine_pcm_release_chan(struct dmaengine_pcm *pcm)  in dmaengine_pcm_release_chan()  argument
415 		if (!pcm->chan[i])  in dmaengine_pcm_release_chan()
417 		dma_release_channel(pcm->chan[i]);  in dmaengine_pcm_release_chan()
418 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_release_chan()
424  * snd_dmaengine_pcm_register - Register a dmaengine based PCM device
425  * @dev: The parent device for the PCM device
426  * @config: Platform specific PCM configuration
433 	struct dmaengine_pcm *pcm;  in snd_dmaengine_pcm_register()  local
436 	pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);  in snd_dmaengine_pcm_register()
437 	if (!pcm)  in snd_dmaengine_pcm_register()
441 	pcm->component.debugfs_prefix = "dma";  in snd_dmaengine_pcm_register()
443 	pcm->config = config;  in snd_dmaengine_pcm_register()
444 	pcm->flags = flags;  in snd_dmaengine_pcm_register()
446 	ret = dmaengine_pcm_request_chan_of(pcm, dev, config);  in snd_dmaengine_pcm_register()
455 	ret = snd_soc_component_initialize(&pcm->component, driver, dev);  in snd_dmaengine_pcm_register()
459 	ret = snd_soc_add_component(&pcm->component, NULL, 0);  in snd_dmaengine_pcm_register()
466 	dmaengine_pcm_release_chan(pcm);  in snd_dmaengine_pcm_register()
467 	kfree(pcm);  in snd_dmaengine_pcm_register()
473  * snd_dmaengine_pcm_unregister - Removes a dmaengine based PCM device
474  * @dev: Parent device the PCM was register with
476  * Removes a dmaengine based PCM device previously registered with
482 	struct dmaengine_pcm *pcm;  in snd_dmaengine_pcm_unregister()  local
488 	pcm = soc_component_to_pcm(component);  in snd_dmaengine_pcm_unregister()
491 	dmaengine_pcm_release_chan(pcm);  in snd_dmaengine_pcm_unregister()
492 	kfree(pcm);  in snd_dmaengine_pcm_unregister()