93 static int snd_timer_free(struct snd_timer *timer);
98 static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left);
105 							 struct snd_timer *timer)  in snd_timer_instance_new()  argument
122 	timeri->timer = timer;  in snd_timer_instance_new()
123 	if (timer && !try_module_get(timer->module)) {  in snd_timer_instance_new()
137 	struct snd_timer *timer = NULL;  in snd_timer_find()  local
139 	list_for_each_entry(timer, &snd_timer_list, device_list) {  in snd_timer_find()
140 		if (timer->tmr_class != tid->dev_class)  in snd_timer_find()
142 		if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD ||  in snd_timer_find()
143 		     timer->tmr_class == SNDRV_TIMER_CLASS_PCM) &&  in snd_timer_find()
144 		    (timer->card == NULL ||  in snd_timer_find()
145 		     timer->card->number != tid->card))  in snd_timer_find()
147 		if (timer->tmr_device != tid->device)  in snd_timer_find()
149 		if (timer->tmr_subdevice != tid->subdevice)  in snd_timer_find()
151 		return timer;  in snd_timer_find()
185 	struct snd_timer *timer;  in snd_timer_check_slave()  local
189 	list_for_each_entry(timer, &snd_timer_list, device_list) {  in snd_timer_check_slave()
190 		list_for_each_entry(master, &timer->open_list_head, open_list) {  in snd_timer_check_slave()
193 				if (master->timer->num_instances >=  in snd_timer_check_slave()
194 				    master->timer->max_instances)  in snd_timer_check_slave()
198 				master->timer->num_instances++;  in snd_timer_check_slave()
201 				slave->timer = master->timer;  in snd_timer_check_slave()
224 			if (master->timer->num_instances >=  in snd_timer_check_master()
225 			    master->timer->max_instances)  in snd_timer_check_master()
228 			master->timer->num_instances++;  in snd_timer_check_master()
230 			spin_lock(&master->timer->lock);  in snd_timer_check_master()
232 			slave->timer = master->timer;  in snd_timer_check_master()
236 			spin_unlock(&master->timer->lock);  in snd_timer_check_master()
253 	struct snd_timer *timer;  in snd_timer_open()  local
287 	timer = snd_timer_find(tid);  in snd_timer_open()
289 	if (!timer) {  in snd_timer_open()
293 		timer = snd_timer_find(tid);  in snd_timer_open()
296 	if (!timer) {  in snd_timer_open()
300 	if (!list_empty(&timer->open_list_head)) {  in snd_timer_open()
301 		timeri = list_entry(timer->open_list_head.next,  in snd_timer_open()
308 	if (timer->num_instances >= timer->max_instances) {  in snd_timer_open()
312 	timeri = snd_timer_instance_new(owner, timer);  in snd_timer_open()
318 	if (timer->card)  in snd_timer_open()
319 		get_device(&timer->card->card_dev);  in snd_timer_open()
323 	if (list_empty(&timer->open_list_head) && timer->hw.open) {  in snd_timer_open()
324 		int err = timer->hw.open(timer);  in snd_timer_open()
329 			if (timer->card)  in snd_timer_open()
330 				put_device(&timer->card->card_dev);  in snd_timer_open()
331 			module_put(timer->module);  in snd_timer_open()
337 	list_add_tail(&timeri->open_list, &timer->open_list_head);  in snd_timer_open()
338 	timer->num_instances++;  in snd_timer_open()
356 	struct snd_timer *timer = NULL;  in snd_timer_close_locked()  local
364 	timer = timeri->timer;  in snd_timer_close_locked()
365 	if (timer) {  in snd_timer_close_locked()
366 		timer->num_instances--;  in snd_timer_close_locked()
368 		spin_lock_irq(&timer->lock);  in snd_timer_close_locked()
370 			spin_unlock_irq(&timer->lock);  in snd_timer_close_locked()
372 			spin_lock_irq(&timer->lock);  in snd_timer_close_locked()
374 		spin_unlock_irq(&timer->lock);  in snd_timer_close_locked()
378 		spin_lock(&timer->lock);  in snd_timer_close_locked()
382 			timer->num_instances--;  in snd_timer_close_locked()
384 			slave->timer = NULL;  in snd_timer_close_locked()
388 		spin_unlock(&timer->lock);  in snd_timer_close_locked()
393 			timer = NULL;  in snd_timer_close_locked()
401 	if (timer) {  in snd_timer_close_locked()
402 		if (list_empty(&timer->open_list_head) && timer->hw.close)  in snd_timer_close_locked()
403 			timer->hw.close(timer);  in snd_timer_close_locked()
405 		if (timer->card)  in snd_timer_close_locked()
406 			put_device(&timer->card->card_dev);  in snd_timer_close_locked()
407 		module_put(timer->module);  in snd_timer_close_locked()
430 static unsigned long snd_timer_hw_resolution(struct snd_timer *timer)  in snd_timer_hw_resolution()  argument
432 	if (timer->hw.c_resolution)  in snd_timer_hw_resolution()
433 		return timer->hw.c_resolution(timer);  in snd_timer_hw_resolution()
435 		return timer->hw.resolution;  in snd_timer_hw_resolution()
440 	struct snd_timer * timer;  in snd_timer_resolution()  local
446 	timer = timeri->timer;  in snd_timer_resolution()
447 	if (timer) {  in snd_timer_resolution()
448 		spin_lock_irqsave(&timer->lock, flags);  in snd_timer_resolution()
449 		ret = snd_timer_hw_resolution(timer);  in snd_timer_resolution()
450 		spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_resolution()
458 	struct snd_timer *timer = ti->timer;  in snd_timer_notify1()  local
470 	if (timer &&  in snd_timer_notify1()
473 		resolution = snd_timer_hw_resolution(timer);  in snd_timer_notify1()
478 	if (timer == NULL)  in snd_timer_notify1()
480 	if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)  in snd_timer_notify1()
491 	struct snd_timer *timer;  in snd_timer_start1()  local
495 	timer = timeri->timer;  in snd_timer_start1()
496 	if (!timer)  in snd_timer_start1()
499 	spin_lock_irqsave(&timer->lock, flags);  in snd_timer_start1()
500 	if (timer->card && timer->card->shutdown) {  in snd_timer_start1()
516 	list_move_tail(&timeri->active_list, &timer->active_list_head);  in snd_timer_start1()
517 	if (timer->running) {  in snd_timer_start1()
518 		if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)  in snd_timer_start1()
520 		timer->flags |= SNDRV_TIMER_FLG_RESCHED;  in snd_timer_start1()
525 			timer->sticks = ticks;  in snd_timer_start1()
526 		timer->hw.start(timer);  in snd_timer_start1()
528 		timer->running++;  in snd_timer_start1()
535 	spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_start1()
551 	if (timeri->master && timeri->timer) {  in snd_timer_start_slave()
552 		spin_lock(&timeri->timer->lock);  in snd_timer_start_slave()
557 		spin_unlock(&timeri->timer->lock);  in snd_timer_start_slave()
566 	struct snd_timer *timer;  in snd_timer_stop1()  local
570 	timer = timeri->timer;  in snd_timer_stop1()
571 	if (!timer)  in snd_timer_stop1()
573 	spin_lock_irqsave(&timer->lock, flags);  in snd_timer_stop1()
581 	if (timer->card && timer->card->shutdown)  in snd_timer_stop1()
588 	    !(--timer->running)) {  in snd_timer_stop1()
589 		timer->hw.stop(timer);  in snd_timer_stop1()
590 		if (timer->flags & SNDRV_TIMER_FLG_RESCHED) {  in snd_timer_stop1()
591 			timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;  in snd_timer_stop1()
592 			snd_timer_reschedule(timer, 0);  in snd_timer_stop1()
593 			if (timer->flags & SNDRV_TIMER_FLG_CHANGE) {  in snd_timer_stop1()
594 				timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;  in snd_timer_stop1()
595 				timer->hw.start(timer);  in snd_timer_stop1()
607 	spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_stop1()
622 	if (timeri->timer) {  in snd_timer_stop_slave()
623 		spin_lock(&timeri->timer->lock);  in snd_timer_stop_slave()
628 		spin_unlock(&timeri->timer->lock);  in snd_timer_stop_slave()
696 static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left)  in snd_timer_reschedule()  argument
701 	list_for_each_entry(ti, &timer->active_list_head, active_list) {  in snd_timer_reschedule()
705 			timer->running++;  in snd_timer_reschedule()
713 		timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;  in snd_timer_reschedule()
716 	if (ticks > timer->hw.ticks)  in snd_timer_reschedule()
717 		ticks = timer->hw.ticks;  in snd_timer_reschedule()
719 		timer->flags |= SNDRV_TIMER_FLG_CHANGE;  in snd_timer_reschedule()
720 	timer->sticks = ticks;  in snd_timer_reschedule()
729 	struct snd_timer *timer = (struct snd_timer *) arg;  in snd_timer_tasklet()  local
735 	if (timer->card && timer->card->shutdown)  in snd_timer_tasklet()
738 	spin_lock_irqsave(&timer->lock, flags);  in snd_timer_tasklet()
740 	while (!list_empty(&timer->sack_list_head)) {  in snd_timer_tasklet()
741 		p = timer->sack_list_head.next;		/* get first item */  in snd_timer_tasklet()
752 		spin_unlock(&timer->lock);  in snd_timer_tasklet()
755 		spin_lock(&timer->lock);  in snd_timer_tasklet()
758 	spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_tasklet()
767 void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)  in snd_timer_interrupt()  argument
775 	if (timer == NULL)  in snd_timer_interrupt()
778 	if (timer->card && timer->card->shutdown)  in snd_timer_interrupt()
781 	spin_lock_irqsave(&timer->lock, flags);  in snd_timer_interrupt()
784 	resolution = snd_timer_hw_resolution(timer);  in snd_timer_interrupt()
791 	list_for_each_entry_safe(ti, tmp, &timer->active_list_head,  in snd_timer_interrupt()
807 			--timer->running;  in snd_timer_interrupt()
810 		if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||  in snd_timer_interrupt()
812 			ack_list_head = &timer->ack_list_head;  in snd_timer_interrupt()
814 			ack_list_head = &timer->sack_list_head;  in snd_timer_interrupt()
824 	if (timer->flags & SNDRV_TIMER_FLG_RESCHED)  in snd_timer_interrupt()
825 		snd_timer_reschedule(timer, timer->sticks);  in snd_timer_interrupt()
826 	if (timer->running) {  in snd_timer_interrupt()
827 		if (timer->hw.flags & SNDRV_TIMER_HW_STOP) {  in snd_timer_interrupt()
828 			timer->hw.stop(timer);  in snd_timer_interrupt()
829 			timer->flags |= SNDRV_TIMER_FLG_CHANGE;  in snd_timer_interrupt()
831 		if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) ||  in snd_timer_interrupt()
832 		    (timer->flags & SNDRV_TIMER_FLG_CHANGE)) {  in snd_timer_interrupt()
834 			timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;  in snd_timer_interrupt()
835 			timer->hw.start(timer);  in snd_timer_interrupt()
838 		timer->hw.stop(timer);  in snd_timer_interrupt()
842 	while (!list_empty(&timer->ack_list_head)) {  in snd_timer_interrupt()
843 		p = timer->ack_list_head.next;		/* get first item */  in snd_timer_interrupt()
853 		spin_unlock(&timer->lock);  in snd_timer_interrupt()
856 		spin_lock(&timer->lock);  in snd_timer_interrupt()
861 	use_tasklet = !list_empty(&timer->sack_list_head);  in snd_timer_interrupt()
862 	spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_interrupt()
865 		tasklet_schedule(&timer->task_queue);  in snd_timer_interrupt()
876 	struct snd_timer *timer;  in snd_timer_new()  local
893 	timer = kzalloc(sizeof(*timer), GFP_KERNEL);  in snd_timer_new()
894 	if (!timer)  in snd_timer_new()
896 	timer->tmr_class = tid->dev_class;  in snd_timer_new()
897 	timer->card = card;  in snd_timer_new()
898 	timer->tmr_device = tid->device;  in snd_timer_new()
899 	timer->tmr_subdevice = tid->subdevice;  in snd_timer_new()
901 		strlcpy(timer->id, id, sizeof(timer->id));  in snd_timer_new()
902 	timer->sticks = 1;  in snd_timer_new()
903 	INIT_LIST_HEAD(&timer->device_list);  in snd_timer_new()
904 	INIT_LIST_HEAD(&timer->open_list_head);  in snd_timer_new()
905 	INIT_LIST_HEAD(&timer->active_list_head);  in snd_timer_new()
906 	INIT_LIST_HEAD(&timer->ack_list_head);  in snd_timer_new()
907 	INIT_LIST_HEAD(&timer->sack_list_head);  in snd_timer_new()
908 	spin_lock_init(&timer->lock);  in snd_timer_new()
909 	tasklet_init(&timer->task_queue, snd_timer_tasklet,  in snd_timer_new()
910 		     (unsigned long)timer);  in snd_timer_new()
911 	timer->max_instances = 1000; /* default limit per timer */  in snd_timer_new()
913 		timer->module = card->module;  in snd_timer_new()
914 		err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops);  in snd_timer_new()
916 			snd_timer_free(timer);  in snd_timer_new()
921 		*rtimer = timer;  in snd_timer_new()
926 static int snd_timer_free(struct snd_timer *timer)  in snd_timer_free()  argument
928 	if (!timer)  in snd_timer_free()
932 	if (! list_empty(&timer->open_list_head)) {  in snd_timer_free()
935 		pr_warn("ALSA: timer %p is busy?\n", timer);  in snd_timer_free()
936 		list_for_each_safe(p, n, &timer->open_list_head) {  in snd_timer_free()
939 			ti->timer = NULL;  in snd_timer_free()
942 	list_del(&timer->device_list);  in snd_timer_free()
945 	if (timer->private_free)  in snd_timer_free()
946 		timer->private_free(timer);  in snd_timer_free()
947 	kfree(timer);  in snd_timer_free()
953 	struct snd_timer *timer = device->device_data;  in snd_timer_dev_free()  local
954 	return snd_timer_free(timer);  in snd_timer_dev_free()
959 	struct snd_timer *timer = dev->device_data;  in snd_timer_dev_register()  local
962 	if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop))  in snd_timer_dev_register()
964 	if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&  in snd_timer_dev_register()
965 	    !timer->hw.resolution && timer->hw.c_resolution == NULL)  in snd_timer_dev_register()
970 		if (timer1->tmr_class > timer->tmr_class)  in snd_timer_dev_register()
972 		if (timer1->tmr_class < timer->tmr_class)  in snd_timer_dev_register()
974 		if (timer1->card && timer->card) {  in snd_timer_dev_register()
975 			if (timer1->card->number > timer->card->number)  in snd_timer_dev_register()
977 			if (timer1->card->number < timer->card->number)  in snd_timer_dev_register()
980 		if (timer1->tmr_device > timer->tmr_device)  in snd_timer_dev_register()
982 		if (timer1->tmr_device < timer->tmr_device)  in snd_timer_dev_register()
984 		if (timer1->tmr_subdevice > timer->tmr_subdevice)  in snd_timer_dev_register()
986 		if (timer1->tmr_subdevice < timer->tmr_subdevice)  in snd_timer_dev_register()
992 	list_add_tail(&timer->device_list, &timer1->device_list);  in snd_timer_dev_register()
999 	struct snd_timer *timer = device->device_data;  in snd_timer_dev_disconnect()  local
1003 	list_del_init(&timer->device_list);  in snd_timer_dev_disconnect()
1005 	list_for_each_entry(ti, &timer->open_list_head, open_list) {  in snd_timer_dev_disconnect()
1013 void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp)  in snd_timer_notify()  argument
1019 	if (timer->card && timer->card->shutdown)  in snd_timer_notify()
1021 	if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))  in snd_timer_notify()
1026 	spin_lock_irqsave(&timer->lock, flags);  in snd_timer_notify()
1030 		resolution = snd_timer_hw_resolution(timer);  in snd_timer_notify()
1031 	list_for_each_entry(ti, &timer->active_list_head, active_list) {  in snd_timer_notify()
1038 	spin_unlock_irqrestore(&timer->lock, flags);  in snd_timer_notify()
1058 int snd_timer_global_free(struct snd_timer *timer)  in snd_timer_global_free()  argument
1060 	return snd_timer_free(timer);  in snd_timer_global_free()
1064 int snd_timer_global_register(struct snd_timer *timer)  in snd_timer_global_register()  argument
1069 	dev.device_data = timer;  in snd_timer_global_register()
1090 	struct snd_timer *timer = priv->snd_timer;  in snd_timer_s_function()  local
1094 	snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies);  in snd_timer_s_function()
1097 static int snd_timer_s_start(struct snd_timer * timer)  in snd_timer_s_start()  argument
1102 	priv = (struct snd_timer_system_private *) timer->private_data;  in snd_timer_s_start()
1104 	if (priv->correction > timer->sticks - 1) {  in snd_timer_s_start()
1105 		priv->correction -= timer->sticks - 1;  in snd_timer_s_start()
1108 		njiff += timer->sticks - priv->correction;  in snd_timer_s_start()
1116 static int snd_timer_s_stop(struct snd_timer * timer)  in snd_timer_s_stop()  argument
1121 	priv = (struct snd_timer_system_private *) timer->private_data;  in snd_timer_s_stop()
1125 		timer->sticks = priv->last_expires - jiff;  in snd_timer_s_stop()
1127 		timer->sticks = 1;  in snd_timer_s_stop()
1132 static int snd_timer_s_close(struct snd_timer *timer)  in snd_timer_s_close()  argument
1136 	priv = (struct snd_timer_system_private *)timer->private_data;  in snd_timer_s_close()
1151 static void snd_timer_free_system(struct snd_timer *timer)  in snd_timer_free_system()  argument
1153 	kfree(timer->private_data);  in snd_timer_free_system()
1158 	struct snd_timer *timer;  in snd_timer_register_system()  local
1162 	err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer);  in snd_timer_register_system()
1165 	strcpy(timer->name, "system timer");  in snd_timer_register_system()
1166 	timer->hw = snd_timer_system;  in snd_timer_register_system()
1169 		snd_timer_free(timer);  in snd_timer_register_system()
1172 	priv->snd_timer = timer;  in snd_timer_register_system()
1174 	timer->private_data = priv;  in snd_timer_register_system()
1175 	timer->private_free = snd_timer_free_system;  in snd_timer_register_system()
1176 	return snd_timer_global_register(timer);  in snd_timer_register_system()
1187 	struct snd_timer *timer;  in snd_timer_proc_read()  local
1191 	list_for_each_entry(timer, &snd_timer_list, device_list) {  in snd_timer_proc_read()
1192 		if (timer->card && timer->card->shutdown)  in snd_timer_proc_read()
1194 		switch (timer->tmr_class) {  in snd_timer_proc_read()
1196 			snd_iprintf(buffer, "G%i: ", timer->tmr_device);  in snd_timer_proc_read()
1200 				    timer->card->number, timer->tmr_device);  in snd_timer_proc_read()
1203 			snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number,  in snd_timer_proc_read()
1204 				    timer->tmr_device, timer->tmr_subdevice);  in snd_timer_proc_read()
1207 			snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class,  in snd_timer_proc_read()
1208 				    timer->card ? timer->card->number : -1,  in snd_timer_proc_read()
1209 				    timer->tmr_device, timer->tmr_subdevice);  in snd_timer_proc_read()
1211 		snd_iprintf(buffer, "%s :", timer->name);  in snd_timer_proc_read()
1212 		if (timer->hw.resolution)  in snd_timer_proc_read()
1214 				    timer->hw.resolution / 1000,  in snd_timer_proc_read()
1215 				    timer->hw.resolution % 1000,  in snd_timer_proc_read()
1216 				    timer->hw.ticks);  in snd_timer_proc_read()
1217 		if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)  in snd_timer_proc_read()
1220 		list_for_each_entry(ti, &timer->open_list_head, open_list)  in snd_timer_proc_read()
1474 static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer)  in snd_timer_user_copy_id()  argument
1476 	id->dev_class = timer->tmr_class;  in snd_timer_user_copy_id()
1478 	id->card = timer->card ? timer->card->number : -1;  in snd_timer_user_copy_id()
1479 	id->device = timer->tmr_device;  in snd_timer_user_copy_id()
1480 	id->subdevice = timer->tmr_subdevice;  in snd_timer_user_copy_id()
1486 	struct snd_timer *timer;  in snd_timer_user_next_device()  local
1496 			timer = list_entry(snd_timer_list.next,  in snd_timer_user_next_device()
1498 			snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1505 				timer = list_entry(p, struct snd_timer, device_list);  in snd_timer_user_next_device()
1506 				if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) {  in snd_timer_user_next_device()
1507 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1510 				if (timer->tmr_device >= id.device) {  in snd_timer_user_next_device()
1511 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1533 				timer = list_entry(p, struct snd_timer, device_list);  in snd_timer_user_next_device()
1534 				if (timer->tmr_class > id.dev_class) {  in snd_timer_user_next_device()
1535 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1538 				if (timer->tmr_class < id.dev_class)  in snd_timer_user_next_device()
1540 				if (timer->card->number > id.card) {  in snd_timer_user_next_device()
1541 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1544 				if (timer->card->number < id.card)  in snd_timer_user_next_device()
1546 				if (timer->tmr_device > id.device) {  in snd_timer_user_next_device()
1547 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1550 				if (timer->tmr_device < id.device)  in snd_timer_user_next_device()
1552 				if (timer->tmr_subdevice > id.subdevice) {  in snd_timer_user_next_device()
1553 					snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1556 				if (timer->tmr_subdevice < id.subdevice)  in snd_timer_user_next_device()
1558 				snd_timer_user_copy_id(&id, timer);  in snd_timer_user_next_device()
1732 	t = tu->timeri->timer;  in snd_timer_user_info()
1762 	t = tu->timeri->timer;  in snd_timer_user_params()
2124 	struct snd_timer *timer, *n;  in snd_timer_free_all()  local
2126 	list_for_each_entry_safe(timer, n, &snd_timer_list, device_list)  in snd_timer_free_all()
2127 		snd_timer_free(timer);  in snd_timer_free_all()