75 	 * call in cable->lock
79 	 * call in cable->lock
91 	 * call in cable->lock
93 	unsigned int (*pos_update)(struct loopback_cable *cable);
142 	struct loopback_cable *cable;  member
207 /* call in cable->lock */
228 /* call in cable->lock */
231 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_start()  local
237 	err = snd_timer_start(cable->snd_timer.instance, 1);  in loopback_snd_timer_start()
241 		 * of the same cable  in loopback_snd_timer_start()
248 			cable->snd_timer.id.card,  in loopback_snd_timer_start()
249 			cable->snd_timer.id.device,  in loopback_snd_timer_start()
250 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_start()
257 /* call in cable->lock */
266 /* call in cable->lock */
269 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_stop()  local
273 	if (cable->running ^ cable->pause)  in loopback_snd_timer_stop()
276 	err = snd_timer_stop(cable->snd_timer.instance);  in loopback_snd_timer_stop()
280 			cable->snd_timer.id.card,  in loopback_snd_timer_stop()
281 			cable->snd_timer.id.device,  in loopback_snd_timer_stop()
282 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_stop()
299 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_close_cable()  local
302 	if (!cable->snd_timer.instance)  in loopback_snd_timer_close_cable()
308 	 * cable->lock;  in loopback_snd_timer_close_cable()
310 	snd_timer_close(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
313 	cancel_work_sync(&cable->snd_timer.event_work);  in loopback_snd_timer_close_cable()
315 	snd_timer_instance_free(cable->snd_timer.instance);  in loopback_snd_timer_close_cable()
316 	memset(&cable->snd_timer, 0, sizeof(cable->snd_timer));  in loopback_snd_timer_close_cable()
321 static int loopback_check_format(struct loopback_cable *cable, int stream)  in loopback_check_format()  argument
328 	if (cable->valid != CABLE_VALID_BOTH) {  in loopback_check_format()
333 	runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
335 	cruntime = cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
345 		snd_pcm_stop(cable->streams[SNDRV_PCM_STREAM_CAPTURE]->  in loopback_check_format()
348 		runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->  in loopback_check_format()
350 		setup = get_setup(cable->streams[SNDRV_PCM_STREAM_PLAYBACK]);  in loopback_check_format()
351 		card = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->loopback->card;  in loopback_check_format()
382 	struct loopback_cable *cable = dpcm->cable;  in loopback_trigger()  local
387 		err = loopback_check_format(cable, substream->stream);  in loopback_trigger()
393 		spin_lock(&cable->lock);	  in loopback_trigger()
394 		cable->running |= stream;  in loopback_trigger()
395 		cable->pause &= ~stream;  in loopback_trigger()
396 		err = cable->ops->start(dpcm);  in loopback_trigger()
397 		spin_unlock(&cable->lock);  in loopback_trigger()
402 		spin_lock(&cable->lock);	  in loopback_trigger()
403 		cable->running &= ~stream;  in loopback_trigger()
404 		cable->pause &= ~stream;  in loopback_trigger()
405 		err = cable->ops->stop(dpcm);  in loopback_trigger()
406 		spin_unlock(&cable->lock);  in loopback_trigger()
412 		spin_lock(&cable->lock);	  in loopback_trigger()
413 		cable->pause |= stream;  in loopback_trigger()
414 		err = cable->ops->stop(dpcm);  in loopback_trigger()
415 		spin_unlock(&cable->lock);  in loopback_trigger()
421 		spin_lock(&cable->lock);  in loopback_trigger()
423 		cable->pause &= ~stream;  in loopback_trigger()
424 		err = cable->ops->start(dpcm);  in loopback_trigger()
425 		spin_unlock(&cable->lock);  in loopback_trigger()
439 	struct loopback_cable *cable = dpcm->cable;  in params_change()  local
441 	cable->hw.formats = pcm_format_to_bits(runtime->format);  in params_change()
442 	cable->hw.rate_min = runtime->rate;  in params_change()
443 	cable->hw.rate_max = runtime->rate;  in params_change()
444 	cable->hw.channels_min = runtime->channels;  in params_change()
445 	cable->hw.channels_max = runtime->channels;  in params_change()
447 	if (cable->snd_timer.instance) {  in params_change()
448 		cable->hw.period_bytes_min =  in params_change()
450 		cable->hw.period_bytes_max = cable->hw.period_bytes_min;  in params_change()
459 	struct loopback_cable *cable = dpcm->cable;  in loopback_prepare()  local
462 	if (cable->ops->stop_sync) {  in loopback_prepare()
463 		err = cable->ops->stop_sync(dpcm);  in loopback_prepare()
490 	if (!(cable->valid & ~(1 << substream->stream)) ||  in loopback_prepare()
494 	cable->valid |= 1 << substream->stream;  in loopback_prepare()
601 /* call in cable->lock */
603 		(struct loopback_cable *cable)  in loopback_jiffies_timer_pos_update()  argument
606 			cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_jiffies_timer_pos_update()
608 			cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_jiffies_timer_pos_update()
612 	running = cable->running ^ cable->pause;  in loopback_jiffies_timer_pos_update()
661 	spin_lock_irqsave(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
662 	if (loopback_jiffies_timer_pos_update(dpcm->cable) &  in loopback_jiffies_timer_function()
667 			spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
673 	spin_unlock_irqrestore(&dpcm->cable->lock, flags);  in loopback_jiffies_timer_function()
676 /* call in cable->lock */
682 		struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_check_resolution()  local
701 			cable->snd_timer.id.card,  in loopback_snd_timer_check_resolution()
702 			cable->snd_timer.id.device,  in loopback_snd_timer_check_resolution()
703 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_check_resolution()
710 static void loopback_snd_timer_period_elapsed(struct loopback_cable *cable,  in loopback_snd_timer_period_elapsed()  argument
720 	spin_lock_irqsave(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
721 	running = cable->running ^ cable->pause;  in loopback_snd_timer_period_elapsed()
724 		spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
728 	dpcm_play = cable->streams[SNDRV_PCM_STREAM_PLAYBACK];  in loopback_snd_timer_period_elapsed()
729 	dpcm_capt = cable->streams[SNDRV_PCM_STREAM_CAPTURE];  in loopback_snd_timer_period_elapsed()
735 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
756 			spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
779 	spin_unlock_irqrestore(&cable->lock, flags);  in loopback_snd_timer_period_elapsed()
791 	struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_function()  local
793 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_TICK,  in loopback_snd_timer_function()
799 	struct loopback_cable *cable;  in loopback_snd_timer_work()  local
801 	cable = container_of(work, struct loopback_cable, snd_timer.event_work);  in loopback_snd_timer_work()
802 	loopback_snd_timer_period_elapsed(cable, SNDRV_TIMER_EVENT_MSTOP, 0);  in loopback_snd_timer_work()
810 	/* Do not lock cable->lock here because timer->lock is already hold.  in loopback_snd_timer_event()
811 	 * There are other functions which first lock cable->lock and than  in loopback_snd_timer_event()
814 	 * spin_lock(&cable->lock)  in loopback_snd_timer_event()
823 		struct loopback_cable *cable = timeri->callback_data;  in loopback_snd_timer_event()  local
833 		schedule_work(&cable->snd_timer.event_work);  in loopback_snd_timer_event()
852 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_dpcm_info()  local
855 		    cable->snd_timer.id.card,  in loopback_snd_timer_dpcm_info()
856 		    cable->snd_timer.id.device,  in loopback_snd_timer_dpcm_info()
857 		    cable->snd_timer.id.subdevice);  in loopback_snd_timer_dpcm_info()
859 		    (cable->snd_timer.stream == SNDRV_PCM_STREAM_CAPTURE) ?  in loopback_snd_timer_dpcm_info()
869 	spin_lock(&dpcm->cable->lock);  in loopback_pointer()
870 	if (dpcm->cable->ops->pos_update)  in loopback_pointer()
871 		dpcm->cable->ops->pos_update(dpcm->cable);  in loopback_pointer()
873 	spin_unlock(&dpcm->cable->lock);  in loopback_pointer()
912 	struct loopback_cable *cable = dpcm->cable;  in loopback_hw_free()  local
915 	cable->valid &= ~(1 << substream->stream);  in loopback_hw_free()
932 	struct loopback_cable *cable = dpcm->cable;  in rule_format()  local
937 	m.bits[0] = (u_int32_t)cable->hw.formats;  in rule_format()
938 	m.bits[1] = (u_int32_t)(cable->hw.formats >> 32);  in rule_format()
947 	struct loopback_cable *cable = dpcm->cable;  in rule_rate()  local
951 	t.min = cable->hw.rate_min;  in rule_rate()
952 	t.max = cable->hw.rate_max;  in rule_rate()
963 	struct loopback_cable *cable = dpcm->cable;  in rule_channels()  local
967 	t.min = cable->hw.channels_min;  in rule_channels()
968 	t.max = cable->hw.channels_max;  in rule_channels()
979 	struct loopback_cable *cable = dpcm->cable;  in rule_period_bytes()  local
983 	t.min = cable->hw.period_bytes_min;  in rule_period_bytes()
984 	t.max = cable->hw.period_bytes_max;  in rule_period_bytes()
996 	struct loopback_cable *cable;  in free_cable()  local
998 	cable = loopback->cables[substream->number][dev];  in free_cable()
999 	if (!cable)  in free_cable()
1001 	if (cable->streams[!substream->stream]) {  in free_cable()
1003 		spin_lock_irq(&cable->lock);  in free_cable()
1004 		cable->streams[substream->stream] = NULL;  in free_cable()
1005 		spin_unlock_irq(&cable->lock);  in free_cable()
1009 		if (cable->ops && cable->ops->close_cable && dpcm)  in free_cable()
1010 			cable->ops->close_cable(dpcm);  in free_cable()
1011 		/* free the cable */  in free_cable()
1013 		kfree(cable);  in free_cable()
1103 	struct loopback_cable *cable = dpcm->cable;  in loopback_snd_timer_open()  local
1106 	 * per playback and capture subdevice (aka cable).  in loopback_snd_timer_open()
1108 	if (cable->snd_timer.instance)  in loopback_snd_timer_open()
1119 	cable->snd_timer.stream = dpcm->substream->stream;  in loopback_snd_timer_open()
1120 	cable->snd_timer.id = tid;  in loopback_snd_timer_open()
1137 	timeri->callback_data = (void *)cable;  in loopback_snd_timer_open()
1141 	INIT_WORK(&cable->snd_timer.event_work, loopback_snd_timer_work);  in loopback_snd_timer_open()
1145 	 * by the other device of the same cable.  in loopback_snd_timer_open()
1148 	 *	   Unlock cable->lock for snd_timer_close/open() call  in loopback_snd_timer_open()
1154 	err = snd_timer_open(timeri, &cable->snd_timer.id, current->pid);  in loopback_snd_timer_open()
1158 			cable->snd_timer.id.card,  in loopback_snd_timer_open()
1159 			cable->snd_timer.id.device,  in loopback_snd_timer_open()
1160 			cable->snd_timer.id.subdevice,  in loopback_snd_timer_open()
1166 	cable->snd_timer.instance = timeri;  in loopback_snd_timer_open()
1188 	struct loopback_cable *cable = NULL;  in loopback_open()  local
1201 	cable = loopback->cables[substream->number][dev];  in loopback_open()
1202 	if (!cable) {  in loopback_open()
1203 		cable = kzalloc(sizeof(*cable), GFP_KERNEL);  in loopback_open()
1204 		if (!cable) {  in loopback_open()
1208 		spin_lock_init(&cable->lock);  in loopback_open()
1209 		cable->hw = loopback_pcm_hardware;  in loopback_open()
1211 			cable->ops = &loopback_snd_timer_ops;  in loopback_open()
1213 			cable->ops = &loopback_jiffies_timer_ops;  in loopback_open()
1214 		loopback->cables[substream->number][dev] = cable;  in loopback_open()
1216 	dpcm->cable = cable;  in loopback_open()
1219 	if (cable->ops->open) {  in loopback_open()
1220 		err = cable->ops->open(dpcm);  in loopback_open()
1253 	if (cable->snd_timer.instance) {  in loopback_open()
1269 		runtime->hw = cable->hw;  in loopback_open()
1271 	spin_lock_irq(&cable->lock);  in loopback_open()
1272 	cable->streams[substream->stream] = dpcm;  in loopback_open()
1273 	spin_unlock_irq(&cable->lock);  in loopback_open()
1290 	if (dpcm->cable->ops->close_substream)  in loopback_close()
1291 		err = dpcm->cable->ops->close_substream(dpcm);  in loopback_close()
1412 	struct loopback_cable *cable;  in loopback_active_get()  local
1417 	cable = loopback->cables[kcontrol->id.subdevice][kcontrol->id.device ^ 1];  in loopback_active_get()
1418 	if (cable != NULL) {  in loopback_active_get()
1419 		unsigned int running = cable->running ^ cable->pause;  in loopback_active_get()
1616 	if (dpcm->cable->ops->dpcm_info)  in print_dpcm_info()
1617 		dpcm->cable->ops->dpcm_info(dpcm, buffer);  in print_dpcm_info()
1625 	struct loopback_cable *cable = loopback->cables[sub][num];  in print_substream_info()  local
1627 	snd_iprintf(buffer, "Cable %i substream %i:\n", num, sub);  in print_substream_info()
1628 	if (cable == NULL) {  in print_substream_info()
1632 	snd_iprintf(buffer, "  valid: %u\n", cable->valid);  in print_substream_info()
1633 	snd_iprintf(buffer, "  running: %u\n", cable->running);  in print_substream_info()
1634 	snd_iprintf(buffer, "  pause: %u\n", cable->pause);  in print_substream_info()
1635 	print_dpcm_info(buffer, cable->streams[0], "Playback");  in print_substream_info()
1636 	print_dpcm_info(buffer, cable->streams[1], "Capture");  in print_substream_info()
1657 	snprintf(name, sizeof(name), "cable#%d", cidx);  in loopback_cable_proc_new()