78 	 * call in cable->lock
82 	 * call in cable->lock
94 	 * call in cable->lock
96 	unsigned int (*pos_update)(struct loopback_cable *cable);
145 	struct loopback_cable *cable;  member
226 /* call in cable->lock */
247 /* call in cable->lock */
250 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_start()  local
256 	err = snd_timer_start(cable->snd_timer.instance, 1);  in loopback_snd_timer_start()
260 		 * of the same cable  in loopback_snd_timer_start()
267 			cable->snd_timer.id.card,  in loopback_snd_timer_start()
268 			cable->snd_timer.id.device,  in loopback_snd_timer_start()
269 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_start()
276 /* call in cable->lock */
285 /* call in cable->lock */
288 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_stop()  local
292 	if (cable->running ^ cable->pause)  in loopback_snd_timer_stop()
295 	err = snd_timer_stop(cable->snd_timer.instance);  in loopback_snd_timer_stop()
299 			cable->snd_timer.id.card,  in loopback_snd_timer_stop()
300 			cable->snd_timer.id.device,  in loopback_snd_timer_stop()
301 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_stop()
318 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_close_cable()  local
321 	if (!cable->snd_timer.instance)  in loopback_snd_timer_close_cable()
327 	 * cable->lock;  in loopback_snd_timer_close_cable()
329 	snd_timer_close(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
332 	cancel_work_sync(&cable->snd_timer.event_work);  in loopback_snd_timer_close_cable()
334 	snd_timer_instance_free(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
335 	memset(&cable->snd_timer, 0, sizeof(cable->snd_timer));  in loopback_snd_timer_close_cable()
340 static int loopback_check_format(struct loopback_cable *cable, int stream)  in loopback_check_format()  argument
347 	if (cable->valid != CABLE_VALID_BOTH) {  in loopback_check_format()
352 	runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
354 	cruntime = cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
364 		snd_pcm_stop(cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
367 		runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
369 		setup = get_setup(cable->streams[SNDRV_PCM_STREAM_PLAYBACK]);  in loopback_check_format()
370 		card = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->loopback->card;  in loopback_check_format()
401 	struct loopback_cable *cable = dpcm->cable;  in loopback_trigger()  local
406 		err = loopback_check_format(cable, substream->stream);  in loopback_trigger()
412 		spin_lock(&cable->lock);	  in loopback_trigger()
413 		cable->running |= stream;  in loopback_trigger()
414 		cable->pause &= ~stream;  in loopback_trigger()
415 		err = cable->ops->start(dpcm);  in loopback_trigger()
416 		spin_unlock(&cable->lock);  in loopback_trigger()
421 		spin_lock(&cable->lock);	  in loopback_trigger()
422 		cable->running &= ~stream;  in loopback_trigger()
423 		cable->pause &= ~stream;  in loopback_trigger()
424 		err = cable->ops->stop(dpcm);  in loopback_trigger()
425 		spin_unlock(&cable->lock);  in loopback_trigger()
431 		spin_lock(&cable->lock);	  in loopback_trigger()
432 		cable->pause |= stream;  in loopback_trigger()
433 		err = cable->ops->stop(dpcm);  in loopback_trigger()
434 		spin_unlock(&cable->lock);  in loopback_trigger()
440 		spin_lock(&cable->lock);  in loopback_trigger()
442 		cable->pause &= ~stream;  in loopback_trigger()
443 		err = cable->ops->start(dpcm);  in loopback_trigger()
444 		spin_unlock(&cable->lock);  in loopback_trigger()
458 	struct loopback_cable *cable = dpcm->cable;  in params_change()  local
460 	cable->hw.formats = pcm_format_to_bits(runtime->format);  in params_change()
461 	cable->hw.rate_min = runtime->rate;  in params_change()
462 	cable->hw.rate_max = runtime->rate;  in params_change()
463 	cable->hw.channels_min = runtime->channels;  in params_change()
464 	cable->hw.channels_max = runtime->channels;  in params_change()
466 	if (cable->snd_timer.instance) {  in params_change()
467 		cable->hw.period_bytes_min =  in params_change()
469 		cable->hw.period_bytes_max = cable->hw.period_bytes_min;  in params_change()
478 	struct loopback_cable *cable = dpcm->cable;  in loopback_prepare()  local
481 	if (cable->ops->stop_sync) {  in loopback_prepare()
482 		err = cable->ops->stop_sync(dpcm);  in loopback_prepare()
509 	if (!(cable->valid & ~(1 << substream->stream)) ||  in loopback_prepare()
513 	cable->valid |= 1 << substream->stream;  in loopback_prepare()
620 /* call in cable->lock */
622 		(struct loopback_cable *cable)  in loopback_jiffies_timer_pos_update()  argument
625 			cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_jiffies_timer_pos_update()
627 			cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_jiffies_timer_pos_update()
632 	running = cable->running ^ cable->pause;  in loopback_jiffies_timer_pos_update()
681 	spin_lock_irqsave(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
682 	if (loopback_jiffies_timer_pos_update(dpcm->cable) &  in loopback_jiffies_timer_function()
687 			spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
693 	spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
696 /* call in cable->lock */
702 		struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_check_resolution()  local
721 			cable->snd_timer.id.card,  in loopback_snd_timer_check_resolution()
722 			cable->snd_timer.id.device,  in loopback_snd_timer_check_resolution()
723 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_check_resolution()
730 static void loopback_snd_timer_period_elapsed(struct loopback_cable *cable,  in loopback_snd_timer_period_elapsed()  argument
740 	spin_lock_irqsave(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
741 	running = cable->running ^ cable->pause;  in loopback_snd_timer_period_elapsed()
744 		spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
748 	dpcm_play = cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_snd_timer_period_elapsed()
749 	dpcm_capt = cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_snd_timer_period_elapsed()
755 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
776 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
799 	spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
811 	struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_function()  local
813 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_TICK,  in loopback_snd_timer_function()
819 	struct loopback_cable *cable;  in loopback_snd_timer_work()  local
821 	cable = container_of(work, struct loopback_cable, snd_timer.event_work);  in loopback_snd_timer_work()
822 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_MSTOP, 0);  in loopback_snd_timer_work()
830 	/* Do not lock cable->lock here because timer->lock is already hold.  in loopback_snd_timer_event()
831 	 * There are other functions which first lock cable->lock and than  in loopback_snd_timer_event()
834 	 * spin_lock(&cable->lock)  in loopback_snd_timer_event()
843 		struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_event()  local
853 		schedule_work(&cable->snd_timer.event_work);  in loopback_snd_timer_event()
872 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_dpcm_info()  local
875 		    cable->snd_timer.id.card,  in loopback_snd_timer_dpcm_info()
876 		    cable->snd_timer.id.device,  in loopback_snd_timer_dpcm_info()
877 		    cable->snd_timer.id.subdevice);  in loopback_snd_timer_dpcm_info()
879 		    (cable->snd_timer.stream == SNDRV_PCM_STREAM_CAPTURE) ?  in loopback_snd_timer_dpcm_info()
889 	spin_lock(&dpcm->cable->lock);  in loopback_pointer()
890 	if (dpcm->cable->ops->pos_update)  in loopback_pointer()
891 		dpcm->cable->ops->pos_update(dpcm->cable);  in loopback_pointer()
893 	spin_unlock(&dpcm->cable->lock);  in loopback_pointer()
932 	struct loopback_cable *cable = dpcm->cable;  in loopback_hw_free()  local
935 	cable->valid &= ~(1 << substream->stream);  in loopback_hw_free()
952 	struct loopback_cable *cable = dpcm->cable;  in rule_format()  local
957 	m.bits[0] = (u_int32_t)cable->hw.formats;  in rule_format()
958 	m.bits[1] = (u_int32_t)(cable->hw.formats >> 32);  in rule_format()
967 	struct loopback_cable *cable = dpcm->cable;  in rule_rate()  local
971 	t.min = cable->hw.rate_min;  in rule_rate()
972 	t.max = cable->hw.rate_max;  in rule_rate()
983 	struct loopback_cable *cable = dpcm->cable;  in rule_channels()  local
987 	t.min = cable->hw.channels_min;  in rule_channels()
988 	t.max = cable->hw.channels_max;  in rule_channels()
999 	struct loopback_cable *cable = dpcm->cable;  in rule_period_bytes()  local
1003 	t.min = cable->hw.period_bytes_min;  in rule_period_bytes()
1004 	t.max = cable->hw.period_bytes_max;  in rule_period_bytes()
1016 	struct loopback_cable *cable;  in free_cable()  local
1018 	cable = loopback->cables[substream->number][dev];  in free_cable()
1019 	if (!cable)  in free_cable()
1021 	if (cable->streams[!substream->stream]) {  in free_cable()
1023 		spin_lock_irq(&cable->lock);  in free_cable()
1024 		cable->streams[substream->stream] = NULL;  in free_cable()
1025 		spin_unlock_irq(&cable->lock);  in free_cable()
1029 		if (cable->ops && cable->ops->close_cable && dpcm)  in free_cable()
1030 			cable->ops->close_cable(dpcm);  in free_cable()
1031 		/* free the cable */  in free_cable()
1033 		kfree(cable);  in free_cable()
1123 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_open()  local
1126 	 * per playback and capture subdevice (aka cable).  in loopback_snd_timer_open()
1128 	if (cable->snd_timer.instance)  in loopback_snd_timer_open()
1139 	cable->snd_timer.stream = dpcm->substream->stream;  in loopback_snd_timer_open()
1140 	cable->snd_timer.id = tid;  in loopback_snd_timer_open()
1157 	timeri->callback_data = (void *)cable;  in loopback_snd_timer_open()
1161 	INIT_WORK(&cable->snd_timer.event_work, loopback_snd_timer_work);  in loopback_snd_timer_open()
1165 	 * by the other device of the same cable.  in loopback_snd_timer_open()
1168 	 *	   Unlock cable->lock for snd_timer_close/open() call  in loopback_snd_timer_open()
1174 	err = snd_timer_open(timeri, &cable->snd_timer.id, current->pid);  in loopback_snd_timer_open()
1178 			cable->snd_timer.id.card,  in loopback_snd_timer_open()
1179 			cable->snd_timer.id.device,  in loopback_snd_timer_open()
1180 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_open()
1186 	cable->snd_timer.instance = timeri;  in loopback_snd_timer_open()
1208 	struct loopback_cable *cable = NULL;  in loopback_open()  local
1221 	cable = loopback->cables[substream->number][dev];  in loopback_open()
1222 	if (!cable) {  in loopback_open()
1223 		cable = kzalloc(sizeof(*cable), GFP_KERNEL);  in loopback_open()
1224 		if (!cable) {  in loopback_open()
1228 		spin_lock_init(&cable->lock);  in loopback_open()
1229 		cable->hw = loopback_pcm_hardware;  in loopback_open()
1231 			cable->ops = &loopback_snd_timer_ops;  in loopback_open()
1233 			cable->ops = &loopback_jiffies_timer_ops;  in loopback_open()
1234 		loopback->cables[substream->number][dev] = cable;  in loopback_open()
1236 	dpcm->cable = cable;  in loopback_open()
1239 	if (cable->ops->open) {  in loopback_open()
1240 		err = cable->ops->open(dpcm);  in loopback_open()
1273 	if (cable->snd_timer.instance) {  in loopback_open()
1289 		runtime->hw = cable->hw;  in loopback_open()
1291 	spin_lock_irq(&cable->lock);  in loopback_open()
1292 	cable->streams[substream->stream] = dpcm;  in loopback_open()
1293 	spin_unlock_irq(&cable->lock);  in loopback_open()
1310 	if (dpcm->cable->ops->close_substream)  in loopback_close()
1311 		err = dpcm->cable->ops->close_substream(dpcm);  in loopback_close()
1432 	struct loopback_cable *cable;  in loopback_active_get()  local
1437 	cable = loopback->cables[kcontrol->id.subdevice][kcontrol->id.device ^ 1];  in loopback_active_get()
1438 	if (cable != NULL) {  in loopback_active_get()
1439 		unsigned int running = cable->running ^ cable->pause;  in loopback_active_get()
1641 	if (dpcm->cable->ops->dpcm_info)  in print_dpcm_info()
1642 		dpcm->cable->ops->dpcm_info(dpcm, buffer);  in print_dpcm_info()
1650 	struct loopback_cable *cable = loopback->cables[sub][num];  in print_substream_info()  local
1652 	snd_iprintf(buffer, "Cable %i substream %i:\n", num, sub);  in print_substream_info()
1653 	if (cable == NULL) {  in print_substream_info()
1657 	snd_iprintf(buffer, "  valid: %u\n", cable->valid);  in print_substream_info()
1658 	snd_iprintf(buffer, "  running: %u\n", cable->running);  in print_substream_info()
1659 	snd_iprintf(buffer, "  pause: %u\n", cable->pause);  in print_substream_info()
1660 	print_dpcm_info(buffer, cable->streams[0], "Playback");  in print_substream_info()
1661 	print_dpcm_info(buffer, cable->streams[1], "Capture");  in print_substream_info()
1682 	snprintf(name, sizeof(name), "cable#%d", cidx);  in loopback_cable_proc_new()