261 static bool hiface_pcm_playback(struct pcm_substream *sub, struct pcm_urb *urb)  in hiface_pcm_playback()  argument
263 	struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;  in hiface_pcm_playback()
270 	pcm_buffer_size = snd_pcm_lib_buffer_bytes(sub->instance);  in hiface_pcm_playback()
272 	if (sub->dma_off + PCM_PACKET_SIZE <= pcm_buffer_size) {  in hiface_pcm_playback()
275 			 (unsigned int) sub->dma_off);  in hiface_pcm_playback()
277 		source = alsa_rt->dma_area + sub->dma_off;  in hiface_pcm_playback()
285 			 (unsigned int) sub->dma_off);  in hiface_pcm_playback()
287 		len = pcm_buffer_size - sub->dma_off;  in hiface_pcm_playback()
289 		source = alsa_rt->dma_area + sub->dma_off;  in hiface_pcm_playback()
296 	sub->dma_off += PCM_PACKET_SIZE;  in hiface_pcm_playback()
297 	if (sub->dma_off >= pcm_buffer_size)  in hiface_pcm_playback()
298 		sub->dma_off -= pcm_buffer_size;  in hiface_pcm_playback()
300 	sub->period_off += PCM_PACKET_SIZE;  in hiface_pcm_playback()
301 	if (sub->period_off >= alsa_rt->period_size) {  in hiface_pcm_playback()
302 		sub->period_off %= alsa_rt->period_size;  in hiface_pcm_playback()
312 	struct pcm_substream *sub;  in hiface_pcm_out_urb_handler()  local
333 	sub = &rt->playback;  in hiface_pcm_out_urb_handler()
334 	spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_out_urb_handler()
335 	if (sub->active)  in hiface_pcm_out_urb_handler()
336 		do_period_elapsed = hiface_pcm_playback(sub, out_urb);  in hiface_pcm_out_urb_handler()
340 	spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_out_urb_handler()
343 		snd_pcm_period_elapsed(sub->instance);  in hiface_pcm_out_urb_handler()
358 	struct pcm_substream *sub = NULL;  in hiface_pcm_open()  local
369 		sub = &rt->playback;  in hiface_pcm_open()
371 	if (!sub) {  in hiface_pcm_open()
392 	sub->instance = alsa_sub;  in hiface_pcm_open()
393 	sub->active = false;  in hiface_pcm_open()
401 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_close()  local
408 	if (sub) {  in hiface_pcm_close()
412 		spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_close()
413 		sub->instance = NULL;  in hiface_pcm_close()
414 		sub->active = false;  in hiface_pcm_close()
415 		spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_close()
437 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_prepare()  local
443 	if (!sub)  in hiface_pcm_prepare()
448 	sub->dma_off = 0;  in hiface_pcm_prepare()
449 	sub->period_off = 0;  in hiface_pcm_prepare()
470 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_trigger()  local
475 	if (!sub)  in hiface_pcm_trigger()
481 		spin_lock_irq(&sub->lock);  in hiface_pcm_trigger()
482 		sub->active = true;  in hiface_pcm_trigger()
483 		spin_unlock_irq(&sub->lock);  in hiface_pcm_trigger()
488 		spin_lock_irq(&sub->lock);  in hiface_pcm_trigger()
489 		sub->active = false;  in hiface_pcm_trigger()
490 		spin_unlock_irq(&sub->lock);  in hiface_pcm_trigger()
500 	struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);  in hiface_pcm_pointer()  local
505 	if (rt->panic || !sub)  in hiface_pcm_pointer()
508 	spin_lock_irqsave(&sub->lock, flags);  in hiface_pcm_pointer()
509 	dma_offset = sub->dma_off;  in hiface_pcm_pointer()
510 	spin_unlock_irqrestore(&sub->lock, flags);  in hiface_pcm_pointer()