74 	 * call in cable->lock
78 	 * call in cable->lock
90 	 * call in cable->lock
92 	unsigned int (*pos_update)(struct loopback_cable *cable);
143 	struct loopback_cable *cable;  member
211 /* call in cable->lock */
232 /* call in cable->lock */
235 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_start()  local
241 	err = snd_timer_start(cable->snd_timer.instance, 1);  in loopback_snd_timer_start()
245 		 * of the same cable  in loopback_snd_timer_start()
252 			cable->snd_timer.id.card,  in loopback_snd_timer_start()
253 			cable->snd_timer.id.device,  in loopback_snd_timer_start()
254 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_start()
261 /* call in cable->lock */
270 /* call in cable->lock */
273 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_stop()  local
277 	if (cable->running ^ cable->pause)  in loopback_snd_timer_stop()
280 	err = snd_timer_stop(cable->snd_timer.instance);  in loopback_snd_timer_stop()
284 			cable->snd_timer.id.card,  in loopback_snd_timer_stop()
285 			cable->snd_timer.id.device,  in loopback_snd_timer_stop()
286 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_stop()
303 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_close_cable()  local
306 	if (!cable->snd_timer.instance)  in loopback_snd_timer_close_cable()
312 	 * cable->lock;  in loopback_snd_timer_close_cable()
314 	snd_timer_close(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
317 	cancel_work_sync(&cable->snd_timer.event_work);  in loopback_snd_timer_close_cable()
319 	snd_timer_instance_free(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
320 	memset(&cable->snd_timer, 0, sizeof(cable->snd_timer));  in loopback_snd_timer_close_cable()
336 static int loopback_check_format(struct loopback_cable *cable, int stream)  in loopback_check_format()  argument
343 	if (cable->valid != CABLE_VALID_BOTH) {  in loopback_check_format()
348 	runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
350 	cruntime = cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
362 		snd_pcm_stop(cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
365 		runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
367 		setup = get_setup(cable->streams[SNDRV_PCM_STREAM_PLAYBACK]);  in loopback_check_format()
368 		card = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->loopback->card;  in loopback_check_format()
405 	struct loopback_cable *cable = dpcm->cable;  in loopback_trigger()  local
410 		err = loopback_check_format(cable, substream->stream);  in loopback_trigger()
416 		spin_lock(&cable->lock);	  in loopback_trigger()
417 		cable->running |= stream;  in loopback_trigger()
418 		cable->pause &= ~stream;  in loopback_trigger()
419 		err = cable->ops->start(dpcm);  in loopback_trigger()
420 		spin_unlock(&cable->lock);  in loopback_trigger()
425 		spin_lock(&cable->lock);	  in loopback_trigger()
426 		cable->running &= ~stream;  in loopback_trigger()
427 		cable->pause &= ~stream;  in loopback_trigger()
428 		err = cable->ops->stop(dpcm);  in loopback_trigger()
429 		spin_unlock(&cable->lock);  in loopback_trigger()
435 		spin_lock(&cable->lock);	  in loopback_trigger()
436 		cable->pause |= stream;  in loopback_trigger()
437 		err = cable->ops->stop(dpcm);  in loopback_trigger()
438 		spin_unlock(&cable->lock);  in loopback_trigger()
444 		spin_lock(&cable->lock);  in loopback_trigger()
446 		cable->pause &= ~stream;  in loopback_trigger()
447 		err = cable->ops->start(dpcm);  in loopback_trigger()
448 		spin_unlock(&cable->lock);  in loopback_trigger()
462 	struct loopback_cable *cable = dpcm->cable;  in params_change()  local
464 	cable->hw.formats = pcm_format_to_bits(runtime->format);  in params_change()
465 	cable->hw.rate_min = runtime->rate;  in params_change()
466 	cable->hw.rate_max = runtime->rate;  in params_change()
467 	cable->hw.channels_min = runtime->channels;  in params_change()
468 	cable->hw.channels_max = runtime->channels;  in params_change()
470 	if (cable->snd_timer.instance) {  in params_change()
471 		cable->hw.period_bytes_min =  in params_change()
473 		cable->hw.period_bytes_max = cable->hw.period_bytes_min;  in params_change()
482 	struct loopback_cable *cable = dpcm->cable;  in loopback_prepare()  local
485 	if (cable->ops->stop_sync) {  in loopback_prepare()
486 		err = cable->ops->stop_sync(dpcm);  in loopback_prepare()
514 	if (!(cable->valid & ~(1 << substream->stream)) ||  in loopback_prepare()
518 	cable->valid |= 1 << substream->stream;  in loopback_prepare()
644 /* call in cable->lock */
646 		(struct loopback_cable *cable)  in loopback_jiffies_timer_pos_update()  argument
649 			cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_jiffies_timer_pos_update()
651 			cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_jiffies_timer_pos_update()
656 	running = cable->running ^ cable->pause;  in loopback_jiffies_timer_pos_update()
705 	spin_lock_irqsave(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
706 	if (loopback_jiffies_timer_pos_update(dpcm->cable) &  in loopback_jiffies_timer_function()
711 			spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
717 	spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
720 /* call in cable->lock */
726 		struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_check_resolution()  local
745 			cable->snd_timer.id.card,  in loopback_snd_timer_check_resolution()
746 			cable->snd_timer.id.device,  in loopback_snd_timer_check_resolution()
747 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_check_resolution()
754 static void loopback_snd_timer_period_elapsed(struct loopback_cable *cable,  in loopback_snd_timer_period_elapsed()  argument
764 	spin_lock_irqsave(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
765 	running = cable->running ^ cable->pause;  in loopback_snd_timer_period_elapsed()
768 		spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
772 	dpcm_play = cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_snd_timer_period_elapsed()
773 	dpcm_capt = cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_snd_timer_period_elapsed()
779 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
800 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
823 	spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
835 	struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_function()  local
837 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_TICK,  in loopback_snd_timer_function()
843 	struct loopback_cable *cable;  in loopback_snd_timer_work()  local
845 	cable = container_of(work, struct loopback_cable, snd_timer.event_work);  in loopback_snd_timer_work()
846 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_MSTOP, 0);  in loopback_snd_timer_work()
854 	/* Do not lock cable->lock here because timer->lock is already hold.  in loopback_snd_timer_event()
855 	 * There are other functions which first lock cable->lock and than  in loopback_snd_timer_event()
858 	 * spin_lock(&cable->lock)  in loopback_snd_timer_event()
867 		struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_event()  local
877 		schedule_work(&cable->snd_timer.event_work);  in loopback_snd_timer_event()
896 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_dpcm_info()  local
899 		    cable->snd_timer.id.card,  in loopback_snd_timer_dpcm_info()
900 		    cable->snd_timer.id.device,  in loopback_snd_timer_dpcm_info()
901 		    cable->snd_timer.id.subdevice);  in loopback_snd_timer_dpcm_info()
903 		    snd_pcm_direction_name(cable->snd_timer.stream));  in loopback_snd_timer_dpcm_info()
912 	spin_lock(&dpcm->cable->lock);  in loopback_pointer()
913 	if (dpcm->cable->ops->pos_update)  in loopback_pointer()
914 		dpcm->cable->ops->pos_update(dpcm->cable);  in loopback_pointer()
916 	spin_unlock(&dpcm->cable->lock);  in loopback_pointer()
958 	struct loopback_cable *cable = dpcm->cable;  in loopback_hw_free()  local
961 	cable->valid &= ~(1 << substream->stream);  in loopback_hw_free()
978 	struct loopback_cable *cable = dpcm->cable;  in rule_format()  local
983 	m.bits[0] = (u_int32_t)cable->hw.formats;  in rule_format()
984 	m.bits[1] = (u_int32_t)(cable->hw.formats >> 32);  in rule_format()
993 	struct loopback_cable *cable = dpcm->cable;  in rule_rate()  local
997 	t.min = cable->hw.rate_min;  in rule_rate()
998 	t.max = cable->hw.rate_max;  in rule_rate()
1009 	struct loopback_cable *cable = dpcm->cable;  in rule_channels()  local
1013 	t.min = cable->hw.channels_min;  in rule_channels()
1014 	t.max = cable->hw.channels_max;  in rule_channels()
1025 	struct loopback_cable *cable = dpcm->cable;  in rule_period_bytes()  local
1029 	t.min = cable->hw.period_bytes_min;  in rule_period_bytes()
1030 	t.max = cable->hw.period_bytes_max;  in rule_period_bytes()
1042 	struct loopback_cable *cable;  in free_cable()  local
1044 	cable = loopback->cables[substream->number][dev];  in free_cable()
1045 	if (!cable)  in free_cable()
1047 	if (cable->streams[!substream->stream]) {  in free_cable()
1049 		spin_lock_irq(&cable->lock);  in free_cable()
1050 		cable->streams[substream->stream] = NULL;  in free_cable()
1051 		spin_unlock_irq(&cable->lock);  in free_cable()
1055 		if (cable->ops && cable->ops->close_cable && dpcm)  in free_cable()
1056 			cable->ops->close_cable(dpcm);  in free_cable()
1057 		/* free the cable */  in free_cable()
1059 		kfree(cable);  in free_cable()
1151 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_open()  local
1154 	 * per playback and capture subdevice (aka cable).  in loopback_snd_timer_open()
1156 	if (cable->snd_timer.instance)  in loopback_snd_timer_open()
1167 	cable->snd_timer.stream = dpcm->substream->stream;  in loopback_snd_timer_open()
1168 	cable->snd_timer.id = tid;  in loopback_snd_timer_open()
1185 	timeri->callback_data = (void *)cable;  in loopback_snd_timer_open()
1189 	INIT_WORK(&cable->snd_timer.event_work, loopback_snd_timer_work);  in loopback_snd_timer_open()
1193 	 * by the other device of the same cable.  in loopback_snd_timer_open()
1196 	 *	   Unlock cable->lock for snd_timer_close/open() call  in loopback_snd_timer_open()
1202 	err = snd_timer_open(timeri, &cable->snd_timer.id, current->pid);  in loopback_snd_timer_open()
1206 			cable->snd_timer.id.card,  in loopback_snd_timer_open()
1207 			cable->snd_timer.id.device,  in loopback_snd_timer_open()
1208 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_open()
1214 	cable->snd_timer.instance = timeri;  in loopback_snd_timer_open()
1236 	struct loopback_cable *cable = NULL;  in loopback_open()  local
1249 	cable = loopback->cables[substream->number][dev];  in loopback_open()
1250 	if (!cable) {  in loopback_open()
1251 		cable = kzalloc(sizeof(*cable), GFP_KERNEL);  in loopback_open()
1252 		if (!cable) {  in loopback_open()
1256 		spin_lock_init(&cable->lock);  in loopback_open()
1257 		cable->hw = loopback_pcm_hardware;  in loopback_open()
1259 			cable->ops = &loopback_snd_timer_ops;  in loopback_open()
1261 			cable->ops = &loopback_jiffies_timer_ops;  in loopback_open()
1262 		loopback->cables[substream->number][dev] = cable;  in loopback_open()
1264 	dpcm->cable = cable;  in loopback_open()
1267 	if (cable->ops->open) {  in loopback_open()
1268 		err = cable->ops->open(dpcm);  in loopback_open()
1301 	if (cable->snd_timer.instance) {  in loopback_open()
1317 		runtime->hw = cable->hw;  in loopback_open()
1319 	spin_lock_irq(&cable->lock);  in loopback_open()
1320 	cable->streams[substream->stream] = dpcm;  in loopback_open()
1321 	spin_unlock_irq(&cable->lock);  in loopback_open()
1338 	if (dpcm->cable->ops->close_substream)  in loopback_close()
1339 		err = dpcm->cable->ops->close_substream(dpcm);  in loopback_close()
1460 	struct loopback_cable *cable;  in loopback_active_get()  local
1465 	cable = loopback->cables[kcontrol->id.subdevice][kcontrol->id.device ^ 1];  in loopback_active_get()
1466 	if (cable != NULL) {  in loopback_active_get()
1467 		unsigned int running = cable->running ^ cable->pause;  in loopback_active_get()
1704 	if (dpcm->cable->ops->dpcm_info)  in print_dpcm_info()
1705 		dpcm->cable->ops->dpcm_info(dpcm, buffer);  in print_dpcm_info()
1713 	struct loopback_cable *cable = loopback->cables[sub][num];  in print_substream_info()  local
1715 	snd_iprintf(buffer, "Cable %i substream %i:\n", num, sub);  in print_substream_info()
1716 	if (cable == NULL) {  in print_substream_info()
1720 	snd_iprintf(buffer, "  valid: %u\n", cable->valid);  in print_substream_info()
1721 	snd_iprintf(buffer, "  running: %u\n", cable->running);  in print_substream_info()
1722 	snd_iprintf(buffer, "  pause: %u\n", cable->pause);  in print_substream_info()
1723 	print_dpcm_info(buffer, cable->streams[0], "Playback");  in print_substream_info()
1724 	print_dpcm_info(buffer, cable->streams[1], "Capture");  in print_substream_info()
1745 	snprintf(name, sizeof(name), "cable#%d", cidx);  in loopback_cable_proc_new()