usb/6fire/pcm.c

192 static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
198 	struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
199 	struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
201 	u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off
228 			sub->dma_off++;
229 			sub->period_off++;
231 				sub->dma_off = 0;
239 static void usb6fire_pcm_playback(struct pcm_substream *sub,
245 	struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
246 	struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
247 	u32 *src = (u32 *) (alsa_rt->dma_area + sub->dma_off
276 			sub->dma_off++;
277 			sub->period_off++;
280 				sub->dma_off = 0;
291 	struct pcm_substream *sub;
315 	sub = &rt->capture;
316 	spin_lock_irqsave(&sub->lock, flags);
317 	if (sub->active) {
318 		usb6fire_pcm_capture(sub, in_urb);
319 		if (sub->period_off >= sub->instance->runtime->period_size) {
320 			sub->period_off %= sub->instance->runtime->period_size;
321 			spin_unlock_irqrestore(&sub->lock, flags);
322 			snd_pcm_period_elapsed(sub->instance);
324 			spin_unlock_irqrestore(&sub->lock, flags);
326 		spin_unlock_irqrestore(&sub->lock, flags);
340 	sub = &rt->playback;
341 	spin_lock_irqsave(&sub->lock, flags);
342 	if (sub->active) {
343 		usb6fire_pcm_playback(sub, out_urb);
344 		if (sub->period_off >= sub->instance->runtime->period_size) {
345 			sub->period_off %= sub->instance->runtime->period_size;
346 			spin_unlock_irqrestore(&sub->lock, flags);
347 			snd_pcm_period_elapsed(sub->instance);
349 			spin_unlock_irqrestore(&sub->lock, flags);
351 		spin_unlock_irqrestore(&sub->lock, flags);
389 	struct pcm_substream *sub = NULL;
402 		sub = &rt->playback;
407 		sub = &rt->capture;
410 	if (!sub) {
416 	sub->instance = alsa_sub;
417 	sub->active = false;
425 	struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
432 	if (sub) {
434 		spin_lock_irqsave(&sub->lock, flags);
435 		sub->instance = NULL;
436 		sub->active = false;
437 		spin_unlock_irqrestore(&sub->lock, flags);
452 	struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
458 	if (!sub)
462 	sub->dma_off = 0;
463 	sub->period_off = 0;
496 	struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
502 	if (!sub)
508 		spin_lock_irqsave(&sub->lock, flags);
509 		sub->active = true;
510 		spin_unlock_irqrestore(&sub->lock, flags);
515 		spin_lock_irqsave(&sub->lock, flags);
516 		sub->active = false;
517 		spin_unlock_irqrestore(&sub->lock, flags);
528 	struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
533 	if (rt->panic || !sub)
536 	spin_lock_irqsave(&sub->lock, flags);
537 	ret = sub->dma_off;
538 	spin_unlock_irqrestore(&sub->lock, flags);