sound/soc/soc-generic-dmaengine-pcm.c

10 #include <sound/pcm.h>
28 static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,  in dmaengine_dma_dev()  argument
31 	if (!pcm->chan[substream->stream])  in dmaengine_dma_dev()
34 	return pcm->chan[substream->stream]->device->dev;  in dmaengine_dma_dev()
39  * @substream: PCM substream
80 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_hw_params()  local
90 	if (!pcm->config)  in dmaengine_pcm_hw_params()
93 		prepare_slave_config = pcm->config->prepare_slave_config;  in dmaengine_pcm_hw_params()
113 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_set_runtime_hwparams()  local
114 	struct device *dma_dev = dmaengine_dma_dev(pcm, substream);  in dmaengine_pcm_set_runtime_hwparams()
115 	struct dma_chan *chan = pcm->chan[substream->stream];  in dmaengine_pcm_set_runtime_hwparams()
125 	if (pcm->config && pcm->config->pcm_hardware)  in dmaengine_pcm_set_runtime_hwparams()
127 				pcm->config->pcm_hardware);  in dmaengine_pcm_set_runtime_hwparams()
141 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_RESIDUE)  in dmaengine_pcm_set_runtime_hwparams()
160 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_open()  local
161 	struct dma_chan *chan = pcm->chan[substream->stream];  in dmaengine_pcm_open()
188 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_compat_request_channel()  local
200 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])  in dmaengine_pcm_compat_request_channel()
201 		return pcm->chan[0];  in dmaengine_pcm_compat_request_channel()
203 	if (pcm->config && pcm->config->compat_request_channel)  in dmaengine_pcm_compat_request_channel()
204 		return pcm->config->compat_request_channel(rtd, substream);  in dmaengine_pcm_compat_request_channel()
206 	if (pcm->config)  in dmaengine_pcm_compat_request_channel()
207 		fn = pcm->config->compat_filter_fn;  in dmaengine_pcm_compat_request_channel()
234 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_new()  local
235 	const struct snd_dmaengine_pcm_config *config = pcm->config;  in dmaengine_pcm_new()
251 		substream = rtd->pcm->streams[i].substream;  in dmaengine_pcm_new()
255 		if (!pcm->chan[i] && config && config->chan_names[i])  in dmaengine_pcm_new()
256 			pcm->chan[i] = dma_request_slave_channel(dev,  in dmaengine_pcm_new()
259 		if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {  in dmaengine_pcm_new()
260 			pcm->chan[i] = dmaengine_pcm_compat_request_channel(  in dmaengine_pcm_new()
264 		if (!pcm->chan[i]) {  in dmaengine_pcm_new()
272 				dmaengine_dma_dev(pcm, substream),  in dmaengine_pcm_new()
276 		if (!dmaengine_pcm_can_report_residue(dev, pcm->chan[i]))  in dmaengine_pcm_new()
277 			pcm->flags |= SND_DMAENGINE_PCM_FLAG_NO_RESIDUE;  in dmaengine_pcm_new()
279 		if (rtd->pcm->streams[i].pcm->name[0] == '\0') {  in dmaengine_pcm_new()
280 			strscpy_pad(rtd->pcm->streams[i].pcm->name,  in dmaengine_pcm_new()
281 				    rtd->pcm->streams[i].pcm->id,  in dmaengine_pcm_new()
282 				    sizeof(rtd->pcm->streams[i].pcm->name));  in dmaengine_pcm_new()
293 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_pcm_pointer()  local
295 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_RESIDUE)  in dmaengine_pcm_pointer()
307 	struct dmaengine_pcm *pcm = soc_component_to_pcm(component);  in dmaengine_copy_user()  local
310 		       void *buf, unsigned long bytes) = pcm->config->process;  in dmaengine_copy_user()
361 static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,  in dmaengine_pcm_request_chan_of()  argument
368 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || (!dev->of_node &&  in dmaengine_pcm_request_chan_of()
385 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
400 			pcm->chan[i] = NULL;  in dmaengine_pcm_request_chan_of()
402 			pcm->chan[i] = chan;  in dmaengine_pcm_request_chan_of()
404 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
408 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_request_chan_of()
409 		pcm->chan[1] = pcm->chan[0];  in dmaengine_pcm_request_chan_of()
414 static void dmaengine_pcm_release_chan(struct dmaengine_pcm *pcm)  in dmaengine_pcm_release_chan()  argument
419 		if (!pcm->chan[i])  in dmaengine_pcm_release_chan()
421 		dma_release_channel(pcm->chan[i]);  in dmaengine_pcm_release_chan()
422 		if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX)  in dmaengine_pcm_release_chan()
428  * snd_dmaengine_pcm_register - Register a dmaengine based PCM device
429  * @dev: The parent device for the PCM device
430  * @config: Platform specific PCM configuration
437 	struct dmaengine_pcm *pcm;  in snd_dmaengine_pcm_register()  local
440 	pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);  in snd_dmaengine_pcm_register()
441 	if (!pcm)  in snd_dmaengine_pcm_register()
445 	pcm->component.debugfs_prefix = "dma";  in snd_dmaengine_pcm_register()
447 	pcm->config = config;  in snd_dmaengine_pcm_register()
448 	pcm->flags = flags;  in snd_dmaengine_pcm_register()
450 	ret = dmaengine_pcm_request_chan_of(pcm, dev, config);  in snd_dmaengine_pcm_register()
459 	ret = snd_soc_component_initialize(&pcm->component, driver, dev);  in snd_dmaengine_pcm_register()
463 	ret = snd_soc_add_component(&pcm->component, NULL, 0);  in snd_dmaengine_pcm_register()
470 	dmaengine_pcm_release_chan(pcm);  in snd_dmaengine_pcm_register()
471 	kfree(pcm);  in snd_dmaengine_pcm_register()
477  * snd_dmaengine_pcm_unregister - Removes a dmaengine based PCM device
478  * @dev: Parent device the PCM was register with
480  * Removes a dmaengine based PCM device previously registered with
486 	struct dmaengine_pcm *pcm;  in snd_dmaengine_pcm_unregister()  local
492 	pcm = soc_component_to_pcm(component);  in snd_dmaengine_pcm_unregister()
495 	dmaengine_pcm_release_chan(pcm);  in snd_dmaengine_pcm_unregister()
496 	kfree(pcm);  in snd_dmaengine_pcm_unregister()