Lines Matching +full:timer +full:-
1 // SPDX-License-Identifier: GPL-2.0-or-later
17 #include <sound/timer.h>
37 MODULE_DESCRIPTION("ALSA timer interface");
45 MODULE_ALIAS("devname:snd/timer");
91 s32 tstamp_sec; /* Timestamp - last update */
103 s64 tstamp_sec; /* Timestamp - last update */
128 static int snd_timer_free(struct snd_timer *timer);
133 static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left);
136 * create a timer instance with the given owner string.
145 timeri->owner = kstrdup(owner, GFP_KERNEL); in snd_timer_instance_new()
146 if (! timeri->owner) { in snd_timer_instance_new()
150 INIT_LIST_HEAD(&timeri->open_list); in snd_timer_instance_new()
151 INIT_LIST_HEAD(&timeri->active_list); in snd_timer_instance_new()
152 INIT_LIST_HEAD(&timeri->ack_list); in snd_timer_instance_new()
153 INIT_LIST_HEAD(&timeri->slave_list_head); in snd_timer_instance_new()
154 INIT_LIST_HEAD(&timeri->slave_active_head); in snd_timer_instance_new()
163 if (timeri->private_free) in snd_timer_instance_free()
164 timeri->private_free(timeri); in snd_timer_instance_free()
165 kfree(timeri->owner); in snd_timer_instance_free()
172 * find a timer instance from the given timer id
176 struct snd_timer *timer; in snd_timer_find() local
178 list_for_each_entry(timer, &snd_timer_list, device_list) { in snd_timer_find()
179 if (timer->tmr_class != tid->dev_class) in snd_timer_find()
181 if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || in snd_timer_find()
182 timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && in snd_timer_find()
183 (timer->card == NULL || in snd_timer_find()
184 timer->card->number != tid->card)) in snd_timer_find()
186 if (timer->tmr_device != tid->device) in snd_timer_find()
188 if (timer->tmr_subdevice != tid->subdevice) in snd_timer_find()
190 return timer; in snd_timer_find()
199 switch (tid->dev_class) { in snd_timer_request()
201 if (tid->device < timer_limit) in snd_timer_request()
202 request_module("snd-timer-%i", tid->device); in snd_timer_request()
206 if (tid->card < snd_ecards_limit) in snd_timer_request()
207 request_module("snd-card-%i", tid->card); in snd_timer_request()
220 if (slave->slave_class != master->slave_class || in check_matching_master_slave()
221 slave->slave_id != master->slave_id) in check_matching_master_slave()
223 if (master->timer->num_instances >= master->timer->max_instances) in check_matching_master_slave()
224 return -EBUSY; in check_matching_master_slave()
225 list_move_tail(&slave->open_list, &master->slave_list_head); in check_matching_master_slave()
226 master->timer->num_instances++; in check_matching_master_slave()
228 spin_lock(&master->timer->lock); in check_matching_master_slave()
229 slave->master = master; in check_matching_master_slave()
230 slave->timer = master->timer; in check_matching_master_slave()
231 if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) in check_matching_master_slave()
232 list_add_tail(&slave->active_list, &master->slave_active_head); in check_matching_master_slave()
233 spin_unlock(&master->timer->lock); in check_matching_master_slave()
246 struct snd_timer *timer; in snd_timer_check_slave() local
251 list_for_each_entry(timer, &snd_timer_list, device_list) { in snd_timer_check_slave()
252 list_for_each_entry(master, &timer->open_list_head, open_list) { in snd_timer_check_slave()
286 * open a timer instance
293 struct snd_timer *timer; in snd_timer_open() local
298 if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { in snd_timer_open()
300 if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || in snd_timer_open()
301 tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { in snd_timer_open()
302 pr_debug("ALSA: timer: invalid slave class %i\n", in snd_timer_open()
303 tid->dev_sclass); in snd_timer_open()
304 err = -EINVAL; in snd_timer_open()
308 err = -EBUSY; in snd_timer_open()
311 timeri->slave_class = tid->dev_sclass; in snd_timer_open()
312 timeri->slave_id = tid->device; in snd_timer_open()
313 timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; in snd_timer_open()
314 list_add_tail(&timeri->open_list, &snd_timer_slave_list); in snd_timer_open()
321 timer = snd_timer_find(tid); in snd_timer_open()
323 if (!timer) { in snd_timer_open()
327 timer = snd_timer_find(tid); in snd_timer_open()
330 if (!timer) { in snd_timer_open()
331 err = -ENODEV; in snd_timer_open()
334 if (!list_empty(&timer->open_list_head)) { in snd_timer_open()
336 list_entry(timer->open_list_head.next, in snd_timer_open()
338 if (t->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { in snd_timer_open()
339 err = -EBUSY; in snd_timer_open()
343 if (timer->num_instances >= timer->max_instances) { in snd_timer_open()
344 err = -EBUSY; in snd_timer_open()
347 if (!try_module_get(timer->module)) { in snd_timer_open()
348 err = -EBUSY; in snd_timer_open()
352 if (timer->card) { in snd_timer_open()
353 get_device(&timer->card->card_dev); in snd_timer_open()
354 card_dev_to_put = &timer->card->card_dev; in snd_timer_open()
357 if (list_empty(&timer->open_list_head) && timer->hw.open) { in snd_timer_open()
358 err = timer->hw.open(timer); in snd_timer_open()
360 module_put(timer->module); in snd_timer_open()
365 timeri->timer = timer; in snd_timer_open()
366 timeri->slave_class = tid->dev_sclass; in snd_timer_open()
367 timeri->slave_id = slave_id; in snd_timer_open()
369 list_add_tail(&timeri->open_list, &timer->open_list_head); in snd_timer_open()
370 timer->num_instances++; in snd_timer_open()
386 * close a timer instance
392 struct snd_timer *timer = timeri->timer; in snd_timer_close_locked() local
395 if (timer) { in snd_timer_close_locked()
396 spin_lock_irq(&timer->lock); in snd_timer_close_locked()
397 timeri->flags |= SNDRV_TIMER_IFLG_DEAD; in snd_timer_close_locked()
398 spin_unlock_irq(&timer->lock); in snd_timer_close_locked()
401 if (!list_empty(&timeri->open_list)) { in snd_timer_close_locked()
402 list_del_init(&timeri->open_list); in snd_timer_close_locked()
403 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_close_locked()
404 num_slaves--; in snd_timer_close_locked()
407 /* force to stop the timer */ in snd_timer_close_locked()
410 if (timer) { in snd_timer_close_locked()
411 timer->num_instances--; in snd_timer_close_locked()
413 spin_lock_irq(&timer->lock); in snd_timer_close_locked()
414 while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { in snd_timer_close_locked()
415 spin_unlock_irq(&timer->lock); in snd_timer_close_locked()
417 spin_lock_irq(&timer->lock); in snd_timer_close_locked()
419 spin_unlock_irq(&timer->lock); in snd_timer_close_locked()
423 spin_lock(&timer->lock); in snd_timer_close_locked()
424 timeri->timer = NULL; in snd_timer_close_locked()
425 list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, in snd_timer_close_locked()
427 list_move_tail(&slave->open_list, &snd_timer_slave_list); in snd_timer_close_locked()
428 timer->num_instances--; in snd_timer_close_locked()
429 slave->master = NULL; in snd_timer_close_locked()
430 slave->timer = NULL; in snd_timer_close_locked()
431 list_del_init(&slave->ack_list); in snd_timer_close_locked()
432 list_del_init(&slave->active_list); in snd_timer_close_locked()
434 spin_unlock(&timer->lock); in snd_timer_close_locked()
437 /* slave doesn't need to release timer resources below */ in snd_timer_close_locked()
438 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_close_locked()
439 timer = NULL; in snd_timer_close_locked()
442 if (timer) { in snd_timer_close_locked()
443 if (list_empty(&timer->open_list_head) && timer->hw.close) in snd_timer_close_locked()
444 timer->hw.close(timer); in snd_timer_close_locked()
446 if (timer->card) in snd_timer_close_locked()
447 *card_devp_to_put = &timer->card->card_dev; in snd_timer_close_locked()
448 module_put(timer->module); in snd_timer_close_locked()
453 * close a timer instance
471 static unsigned long snd_timer_hw_resolution(struct snd_timer *timer) in snd_timer_hw_resolution() argument
473 if (timer->hw.c_resolution) in snd_timer_hw_resolution()
474 return timer->hw.c_resolution(timer); in snd_timer_hw_resolution()
476 return timer->hw.resolution; in snd_timer_hw_resolution()
481 struct snd_timer * timer; in snd_timer_resolution() local
487 timer = timeri->timer; in snd_timer_resolution()
488 if (timer) { in snd_timer_resolution()
489 spin_lock_irqsave(&timer->lock, flags); in snd_timer_resolution()
490 ret = snd_timer_hw_resolution(timer); in snd_timer_resolution()
491 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_resolution()
499 struct snd_timer *timer = ti->timer; in snd_timer_notify1() local
511 if (timer && in snd_timer_notify1()
514 resolution = snd_timer_hw_resolution(timer); in snd_timer_notify1()
515 if (ti->ccallback) in snd_timer_notify1()
516 ti->ccallback(ti, event, &tstamp, resolution); in snd_timer_notify1()
517 if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_notify1()
519 if (timer == NULL) in snd_timer_notify1()
521 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) in snd_timer_notify1()
524 list_for_each_entry(ts, &ti->slave_active_head, active_list) in snd_timer_notify1()
525 if (ts->ccallback) in snd_timer_notify1()
526 ts->ccallback(ts, event, &tstamp, resolution); in snd_timer_notify1()
529 /* start/continue a master timer */
533 struct snd_timer *timer; in snd_timer_start1() local
537 timer = timeri->timer; in snd_timer_start1()
538 if (!timer) in snd_timer_start1()
539 return -EINVAL; in snd_timer_start1()
541 spin_lock_irqsave(&timer->lock, flags); in snd_timer_start1()
542 if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { in snd_timer_start1()
543 result = -EINVAL; in snd_timer_start1()
546 if (timer->card && timer->card->shutdown) { in snd_timer_start1()
547 result = -ENODEV; in snd_timer_start1()
550 if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | in snd_timer_start1()
552 result = -EBUSY; in snd_timer_start1()
557 timeri->ticks = timeri->cticks = ticks; in snd_timer_start1()
558 else if (!timeri->cticks) in snd_timer_start1()
559 timeri->cticks = 1; in snd_timer_start1()
560 timeri->pticks = 0; in snd_timer_start1()
562 list_move_tail(&timeri->active_list, &timer->active_list_head); in snd_timer_start1()
563 if (timer->running) { in snd_timer_start1()
564 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) in snd_timer_start1()
566 timer->flags |= SNDRV_TIMER_FLG_RESCHED; in snd_timer_start1()
567 timeri->flags |= SNDRV_TIMER_IFLG_START; in snd_timer_start1()
571 timer->sticks = ticks; in snd_timer_start1()
572 timer->hw.start(timer); in snd_timer_start1()
574 timer->running++; in snd_timer_start1()
575 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; in snd_timer_start1()
581 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_start1()
585 /* start/continue a slave timer */
593 if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { in snd_timer_start_slave()
594 err = -EINVAL; in snd_timer_start_slave()
597 if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { in snd_timer_start_slave()
598 err = -EBUSY; in snd_timer_start_slave()
601 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; in snd_timer_start_slave()
602 if (timeri->master && timeri->timer) { in snd_timer_start_slave()
603 spin_lock(&timeri->timer->lock); in snd_timer_start_slave()
604 list_add_tail(&timeri->active_list, in snd_timer_start_slave()
605 &timeri->master->slave_active_head); in snd_timer_start_slave()
608 spin_unlock(&timeri->timer->lock); in snd_timer_start_slave()
616 /* stop/pause a master timer */
619 struct snd_timer *timer; in snd_timer_stop1() local
623 timer = timeri->timer; in snd_timer_stop1()
624 if (!timer) in snd_timer_stop1()
625 return -EINVAL; in snd_timer_stop1()
626 spin_lock_irqsave(&timer->lock, flags); in snd_timer_stop1()
627 list_del_init(&timeri->ack_list); in snd_timer_stop1()
628 list_del_init(&timeri->active_list); in snd_timer_stop1()
629 if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | in snd_timer_stop1()
631 result = -EBUSY; in snd_timer_stop1()
634 if (timer->card && timer->card->shutdown) in snd_timer_stop1()
637 timeri->cticks = timeri->ticks; in snd_timer_stop1()
638 timeri->pticks = 0; in snd_timer_stop1()
640 if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && in snd_timer_stop1()
641 !(--timer->running)) { in snd_timer_stop1()
642 timer->hw.stop(timer); in snd_timer_stop1()
643 if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { in snd_timer_stop1()
644 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; in snd_timer_stop1()
645 snd_timer_reschedule(timer, 0); in snd_timer_stop1()
646 if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { in snd_timer_stop1()
647 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; in snd_timer_stop1()
648 timer->hw.start(timer); in snd_timer_stop1()
652 timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); in snd_timer_stop1()
654 timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; in snd_timer_stop1()
656 timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; in snd_timer_stop1()
660 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_stop1()
664 /* stop/pause a slave timer */
671 running = timeri->flags & SNDRV_TIMER_IFLG_RUNNING; in snd_timer_stop_slave()
672 timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; in snd_timer_stop_slave()
673 if (timeri->timer) { in snd_timer_stop_slave()
674 spin_lock(&timeri->timer->lock); in snd_timer_stop_slave()
675 list_del_init(&timeri->ack_list); in snd_timer_stop_slave()
676 list_del_init(&timeri->active_list); in snd_timer_stop_slave()
680 spin_unlock(&timeri->timer->lock); in snd_timer_stop_slave()
683 return running ? 0 : -EBUSY; in snd_timer_stop_slave()
687 * start the timer instance
692 return -EINVAL; in snd_timer_start()
693 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_start()
701 * stop the timer instance.
703 * do not call this from the timer callback!
707 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_stop()
719 /* timer can continue only after pause */ in snd_timer_continue()
720 if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) in snd_timer_continue()
721 return -EINVAL; in snd_timer_continue()
723 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_continue()
735 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) in snd_timer_pause()
743 * reschedule the timer
746 * when the scheduling ticks is changed set CHANGE flag to reprogram the timer.
748 static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) in snd_timer_reschedule() argument
753 list_for_each_entry(ti, &timer->active_list_head, active_list) { in snd_timer_reschedule()
754 if (ti->flags & SNDRV_TIMER_IFLG_START) { in snd_timer_reschedule()
755 ti->flags &= ~SNDRV_TIMER_IFLG_START; in snd_timer_reschedule()
756 ti->flags |= SNDRV_TIMER_IFLG_RUNNING; in snd_timer_reschedule()
757 timer->running++; in snd_timer_reschedule()
759 if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { in snd_timer_reschedule()
760 if (ticks > ti->cticks) in snd_timer_reschedule()
761 ticks = ti->cticks; in snd_timer_reschedule()
765 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; in snd_timer_reschedule()
768 if (ticks > timer->hw.ticks) in snd_timer_reschedule()
769 ticks = timer->hw.ticks; in snd_timer_reschedule()
771 timer->flags |= SNDRV_TIMER_FLG_CHANGE; in snd_timer_reschedule()
772 timer->sticks = ticks; in snd_timer_reschedule()
775 /* call callbacks in timer ack list */
776 static void snd_timer_process_callbacks(struct snd_timer *timer, in snd_timer_process_callbacks() argument
787 list_del_init(&ti->ack_list); in snd_timer_process_callbacks()
789 if (!(ti->flags & SNDRV_TIMER_IFLG_DEAD)) { in snd_timer_process_callbacks()
790 ticks = ti->pticks; in snd_timer_process_callbacks()
791 ti->pticks = 0; in snd_timer_process_callbacks()
792 resolution = ti->resolution; in snd_timer_process_callbacks()
793 ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; in snd_timer_process_callbacks()
794 spin_unlock(&timer->lock); in snd_timer_process_callbacks()
795 if (ti->callback) in snd_timer_process_callbacks()
796 ti->callback(ti, resolution, ticks); in snd_timer_process_callbacks()
797 spin_lock(&timer->lock); in snd_timer_process_callbacks()
798 ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; in snd_timer_process_callbacks()
804 static void snd_timer_clear_callbacks(struct snd_timer *timer, in snd_timer_clear_callbacks() argument
809 spin_lock_irqsave(&timer->lock, flags); in snd_timer_clear_callbacks()
811 list_del_init(head->next); in snd_timer_clear_callbacks()
812 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_clear_callbacks()
816 * timer work
821 struct snd_timer *timer = container_of(work, struct snd_timer, task_work); in snd_timer_work() local
824 if (timer->card && timer->card->shutdown) { in snd_timer_work()
825 snd_timer_clear_callbacks(timer, &timer->sack_list_head); in snd_timer_work()
829 spin_lock_irqsave(&timer->lock, flags); in snd_timer_work()
830 snd_timer_process_callbacks(timer, &timer->sack_list_head); in snd_timer_work()
831 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_work()
835 * timer interrupt
837 * ticks_left is usually equal to timer->sticks.
840 void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) in snd_timer_interrupt() argument
848 if (timer == NULL) in snd_timer_interrupt()
851 if (timer->card && timer->card->shutdown) { in snd_timer_interrupt()
852 snd_timer_clear_callbacks(timer, &timer->ack_list_head); in snd_timer_interrupt()
856 spin_lock_irqsave(&timer->lock, flags); in snd_timer_interrupt()
859 resolution = snd_timer_hw_resolution(timer); in snd_timer_interrupt()
866 list_for_each_entry_safe(ti, tmp, &timer->active_list_head, in snd_timer_interrupt()
868 if (ti->flags & SNDRV_TIMER_IFLG_DEAD) in snd_timer_interrupt()
870 if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) in snd_timer_interrupt()
872 ti->pticks += ticks_left; in snd_timer_interrupt()
873 ti->resolution = resolution; in snd_timer_interrupt()
874 if (ti->cticks < ticks_left) in snd_timer_interrupt()
875 ti->cticks = 0; in snd_timer_interrupt()
877 ti->cticks -= ticks_left; in snd_timer_interrupt()
878 if (ti->cticks) /* not expired */ in snd_timer_interrupt()
880 if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { in snd_timer_interrupt()
881 ti->cticks = ti->ticks; in snd_timer_interrupt()
883 ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; in snd_timer_interrupt()
884 --timer->running; in snd_timer_interrupt()
885 list_del_init(&ti->active_list); in snd_timer_interrupt()
887 if ((timer->hw.flags & SNDRV_TIMER_HW_WORK) || in snd_timer_interrupt()
888 (ti->flags & SNDRV_TIMER_IFLG_FAST)) in snd_timer_interrupt()
889 ack_list_head = &timer->ack_list_head; in snd_timer_interrupt()
891 ack_list_head = &timer->sack_list_head; in snd_timer_interrupt()
892 if (list_empty(&ti->ack_list)) in snd_timer_interrupt()
893 list_add_tail(&ti->ack_list, ack_list_head); in snd_timer_interrupt()
894 list_for_each_entry(ts, &ti->slave_active_head, active_list) { in snd_timer_interrupt()
895 ts->pticks = ti->pticks; in snd_timer_interrupt()
896 ts->resolution = resolution; in snd_timer_interrupt()
897 if (list_empty(&ts->ack_list)) in snd_timer_interrupt()
898 list_add_tail(&ts->ack_list, ack_list_head); in snd_timer_interrupt()
901 if (timer->flags & SNDRV_TIMER_FLG_RESCHED) in snd_timer_interrupt()
902 snd_timer_reschedule(timer, timer->sticks); in snd_timer_interrupt()
903 if (timer->running) { in snd_timer_interrupt()
904 if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { in snd_timer_interrupt()
905 timer->hw.stop(timer); in snd_timer_interrupt()
906 timer->flags |= SNDRV_TIMER_FLG_CHANGE; in snd_timer_interrupt()
908 if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || in snd_timer_interrupt()
909 (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { in snd_timer_interrupt()
910 /* restart timer */ in snd_timer_interrupt()
911 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; in snd_timer_interrupt()
912 timer->hw.start(timer); in snd_timer_interrupt()
915 timer->hw.stop(timer); in snd_timer_interrupt()
919 snd_timer_process_callbacks(timer, &timer->ack_list_head); in snd_timer_interrupt()
922 use_work = !list_empty(&timer->sack_list_head); in snd_timer_interrupt()
923 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_interrupt()
926 queue_work(system_highpri_wq, &timer->task_work); in snd_timer_interrupt()
937 struct snd_timer *timer; in snd_timer_new() local
946 return -EINVAL; in snd_timer_new()
947 if (tid->dev_class == SNDRV_TIMER_CLASS_CARD || in snd_timer_new()
948 tid->dev_class == SNDRV_TIMER_CLASS_PCM) { in snd_timer_new()
950 return -EINVAL; in snd_timer_new()
954 timer = kzalloc(sizeof(*timer), GFP_KERNEL); in snd_timer_new()
955 if (!timer) in snd_timer_new()
956 return -ENOMEM; in snd_timer_new()
957 timer->tmr_class = tid->dev_class; in snd_timer_new()
958 timer->card = card; in snd_timer_new()
959 timer->tmr_device = tid->device; in snd_timer_new()
960 timer->tmr_subdevice = tid->subdevice; in snd_timer_new()
962 strscpy(timer->id, id, sizeof(timer->id)); in snd_timer_new()
963 timer->sticks = 1; in snd_timer_new()
964 INIT_LIST_HEAD(&timer->device_list); in snd_timer_new()
965 INIT_LIST_HEAD(&timer->open_list_head); in snd_timer_new()
966 INIT_LIST_HEAD(&timer->active_list_head); in snd_timer_new()
967 INIT_LIST_HEAD(&timer->ack_list_head); in snd_timer_new()
968 INIT_LIST_HEAD(&timer->sack_list_head); in snd_timer_new()
969 spin_lock_init(&timer->lock); in snd_timer_new()
970 INIT_WORK(&timer->task_work, snd_timer_work); in snd_timer_new()
971 timer->max_instances = 1000; /* default limit per timer */ in snd_timer_new()
973 timer->module = card->module; in snd_timer_new()
974 err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); in snd_timer_new()
976 snd_timer_free(timer); in snd_timer_new()
981 *rtimer = timer; in snd_timer_new()
986 static int snd_timer_free(struct snd_timer *timer) in snd_timer_free() argument
988 if (!timer) in snd_timer_free()
992 if (! list_empty(&timer->open_list_head)) { in snd_timer_free()
995 pr_warn("ALSA: timer %p is busy?\n", timer); in snd_timer_free()
996 list_for_each_safe(p, n, &timer->open_list_head) { in snd_timer_free()
999 ti->timer = NULL; in snd_timer_free()
1002 list_del(&timer->device_list); in snd_timer_free()
1005 if (timer->private_free) in snd_timer_free()
1006 timer->private_free(timer); in snd_timer_free()
1007 kfree(timer); in snd_timer_free()
1013 struct snd_timer *timer = device->device_data; in snd_timer_dev_free() local
1014 return snd_timer_free(timer); in snd_timer_dev_free()
1019 struct snd_timer *timer = dev->device_data; in snd_timer_dev_register() local
1022 if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) in snd_timer_dev_register()
1023 return -ENXIO; in snd_timer_dev_register()
1024 if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && in snd_timer_dev_register()
1025 !timer->hw.resolution && timer->hw.c_resolution == NULL) in snd_timer_dev_register()
1026 return -EINVAL; in snd_timer_dev_register()
1030 if (timer1->tmr_class > timer->tmr_class) in snd_timer_dev_register()
1032 if (timer1->tmr_class < timer->tmr_class) in snd_timer_dev_register()
1034 if (timer1->card && timer->card) { in snd_timer_dev_register()
1035 if (timer1->card->number > timer->card->number) in snd_timer_dev_register()
1037 if (timer1->card->number < timer->card->number) in snd_timer_dev_register()
1040 if (timer1->tmr_device > timer->tmr_device) in snd_timer_dev_register()
1042 if (timer1->tmr_device < timer->tmr_device) in snd_timer_dev_register()
1044 if (timer1->tmr_subdevice > timer->tmr_subdevice) in snd_timer_dev_register()
1046 if (timer1->tmr_subdevice < timer->tmr_subdevice) in snd_timer_dev_register()
1050 return -EBUSY; in snd_timer_dev_register()
1052 list_add_tail(&timer->device_list, &timer1->device_list); in snd_timer_dev_register()
1059 struct snd_timer *timer = device->device_data; in snd_timer_dev_disconnect() local
1063 list_del_init(&timer->device_list); in snd_timer_dev_disconnect()
1065 list_for_each_entry(ti, &timer->open_list_head, open_list) { in snd_timer_dev_disconnect()
1066 if (ti->disconnect) in snd_timer_dev_disconnect()
1067 ti->disconnect(ti); in snd_timer_dev_disconnect()
1073 void snd_timer_notify(struct snd_timer *timer, int event, struct timespec64 *tstamp) in snd_timer_notify() argument
1079 if (timer->card && timer->card->shutdown) in snd_timer_notify()
1081 if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) in snd_timer_notify()
1086 spin_lock_irqsave(&timer->lock, flags); in snd_timer_notify()
1090 resolution = snd_timer_hw_resolution(timer); in snd_timer_notify()
1091 list_for_each_entry(ti, &timer->active_list_head, active_list) { in snd_timer_notify()
1092 if (ti->ccallback) in snd_timer_notify()
1093 ti->ccallback(ti, event, tstamp, resolution); in snd_timer_notify()
1094 list_for_each_entry(ts, &ti->slave_active_head, active_list) in snd_timer_notify()
1095 if (ts->ccallback) in snd_timer_notify()
1096 ts->ccallback(ts, event, tstamp, resolution); in snd_timer_notify()
1098 spin_unlock_irqrestore(&timer->lock, flags); in snd_timer_notify()
1111 tid.card = -1; in snd_timer_global_new()
1118 int snd_timer_global_free(struct snd_timer *timer) in snd_timer_global_free() argument
1120 return snd_timer_free(timer); in snd_timer_global_free()
1124 int snd_timer_global_register(struct snd_timer *timer) in snd_timer_global_register() argument
1129 dev.device_data = timer; in snd_timer_global_register()
1135 * System timer
1150 struct snd_timer *timer = priv->snd_timer; in snd_timer_s_function() local
1152 if (time_after(jiff, priv->last_expires)) in snd_timer_s_function()
1153 priv->correction += (long)jiff - (long)priv->last_expires; in snd_timer_s_function()
1154 snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); in snd_timer_s_function()
1157 static int snd_timer_s_start(struct snd_timer * timer) in snd_timer_s_start() argument
1162 priv = (struct snd_timer_system_private *) timer->private_data; in snd_timer_s_start()
1163 njiff = (priv->last_jiffies = jiffies); in snd_timer_s_start()
1164 if (priv->correction > timer->sticks - 1) { in snd_timer_s_start()
1165 priv->correction -= timer->sticks - 1; in snd_timer_s_start()
1168 njiff += timer->sticks - priv->correction; in snd_timer_s_start()
1169 priv->correction = 0; in snd_timer_s_start()
1171 priv->last_expires = njiff; in snd_timer_s_start()
1172 mod_timer(&priv->tlist, njiff); in snd_timer_s_start()
1176 static int snd_timer_s_stop(struct snd_timer * timer) in snd_timer_s_stop() argument
1181 priv = (struct snd_timer_system_private *) timer->private_data; in snd_timer_s_stop()
1182 del_timer(&priv->tlist); in snd_timer_s_stop()
1184 if (time_before(jiff, priv->last_expires)) in snd_timer_s_stop()
1185 timer->sticks = priv->last_expires - jiff; in snd_timer_s_stop()
1187 timer->sticks = 1; in snd_timer_s_stop()
1188 priv->correction = 0; in snd_timer_s_stop()
1192 static int snd_timer_s_close(struct snd_timer *timer) in snd_timer_s_close() argument
1196 priv = (struct snd_timer_system_private *)timer->private_data; in snd_timer_s_close()
1197 del_timer_sync(&priv->tlist); in snd_timer_s_close()
1211 static void snd_timer_free_system(struct snd_timer *timer) in snd_timer_free_system() argument
1213 kfree(timer->private_data); in snd_timer_free_system()
1218 struct snd_timer *timer; in snd_timer_register_system() local
1222 err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); in snd_timer_register_system()
1225 strcpy(timer->name, "system timer"); in snd_timer_register_system()
1226 timer->hw = snd_timer_system; in snd_timer_register_system()
1229 snd_timer_free(timer); in snd_timer_register_system()
1230 return -ENOMEM; in snd_timer_register_system()
1232 priv->snd_timer = timer; in snd_timer_register_system()
1233 timer_setup(&priv->tlist, snd_timer_s_function, 0); in snd_timer_register_system()
1234 timer->private_data = priv; in snd_timer_register_system()
1235 timer->private_free = snd_timer_free_system; in snd_timer_register_system()
1236 return snd_timer_global_register(timer); in snd_timer_register_system()
1247 struct snd_timer *timer; in snd_timer_proc_read() local
1252 list_for_each_entry(timer, &snd_timer_list, device_list) { in snd_timer_proc_read()
1253 if (timer->card && timer->card->shutdown) in snd_timer_proc_read()
1255 switch (timer->tmr_class) { in snd_timer_proc_read()
1257 snd_iprintf(buffer, "G%i: ", timer->tmr_device); in snd_timer_proc_read()
1260 snd_iprintf(buffer, "C%i-%i: ", in snd_timer_proc_read()
1261 timer->card->number, timer->tmr_device); in snd_timer_proc_read()
1264 snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, in snd_timer_proc_read()
1265 timer->tmr_device, timer->tmr_subdevice); in snd_timer_proc_read()
1268 snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, in snd_timer_proc_read()
1269 timer->card ? timer->card->number : -1, in snd_timer_proc_read()
1270 timer->tmr_device, timer->tmr_subdevice); in snd_timer_proc_read()
1272 snd_iprintf(buffer, "%s :", timer->name); in snd_timer_proc_read()
1273 spin_lock_irq(&timer->lock); in snd_timer_proc_read()
1274 resolution = snd_timer_hw_resolution(timer); in snd_timer_proc_read()
1275 spin_unlock_irq(&timer->lock); in snd_timer_proc_read()
1280 timer->hw.ticks); in snd_timer_proc_read()
1281 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) in snd_timer_proc_read()
1284 list_for_each_entry(ti, &timer->open_list_head, open_list) in snd_timer_proc_read()
1286 ti->owner ? ti->owner : "unknown", in snd_timer_proc_read()
1287 (ti->flags & (SNDRV_TIMER_IFLG_START | in snd_timer_proc_read()
1302 entry->c.text.read = snd_timer_proc_read; in snd_timer_proc_init()
1328 struct snd_timer_user *tu = timeri->callback_data; in snd_timer_user_interrupt()
1332 spin_lock(&tu->qlock); in snd_timer_user_interrupt()
1333 if (tu->qused > 0) { in snd_timer_user_interrupt()
1334 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; in snd_timer_user_interrupt()
1335 r = &tu->queue[prev]; in snd_timer_user_interrupt()
1336 if (r->resolution == resolution) { in snd_timer_user_interrupt()
1337 r->ticks += ticks; in snd_timer_user_interrupt()
1341 if (tu->qused >= tu->queue_size) { in snd_timer_user_interrupt()
1342 tu->overrun++; in snd_timer_user_interrupt()
1344 r = &tu->queue[tu->qtail++]; in snd_timer_user_interrupt()
1345 tu->qtail %= tu->queue_size; in snd_timer_user_interrupt()
1346 r->resolution = resolution; in snd_timer_user_interrupt()
1347 r->ticks = ticks; in snd_timer_user_interrupt()
1348 tu->qused++; in snd_timer_user_interrupt()
1351 spin_unlock(&tu->qlock); in snd_timer_user_interrupt()
1352 snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); in snd_timer_user_interrupt()
1353 wake_up(&tu->qchange_sleep); in snd_timer_user_interrupt()
1359 if (tu->qused >= tu->queue_size) { in snd_timer_user_append_to_tqueue()
1360 tu->overrun++; in snd_timer_user_append_to_tqueue()
1362 memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); in snd_timer_user_append_to_tqueue()
1363 tu->qtail %= tu->queue_size; in snd_timer_user_append_to_tqueue()
1364 tu->qused++; in snd_timer_user_append_to_tqueue()
1373 struct snd_timer_user *tu = timeri->callback_data; in snd_timer_user_ccallback()
1379 tu->tstamp = *tstamp; in snd_timer_user_ccallback()
1380 if ((tu->filter & (1 << event)) == 0 || !tu->tread) in snd_timer_user_ccallback()
1384 r1.tstamp_sec = tstamp->tv_sec; in snd_timer_user_ccallback()
1385 r1.tstamp_nsec = tstamp->tv_nsec; in snd_timer_user_ccallback()
1387 spin_lock_irqsave(&tu->qlock, flags); in snd_timer_user_ccallback()
1389 spin_unlock_irqrestore(&tu->qlock, flags); in snd_timer_user_ccallback()
1390 snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); in snd_timer_user_ccallback()
1391 wake_up(&tu->qchange_sleep); in snd_timer_user_ccallback()
1396 struct snd_timer_user *tu = timeri->callback_data; in snd_timer_user_disconnect()
1398 tu->disconnected = true; in snd_timer_user_disconnect()
1399 wake_up(&tu->qchange_sleep); in snd_timer_user_disconnect()
1406 struct snd_timer_user *tu = timeri->callback_data; in snd_timer_user_tinterrupt()
1413 spin_lock(&tu->qlock); in snd_timer_user_tinterrupt()
1414 if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | in snd_timer_user_tinterrupt()
1416 spin_unlock(&tu->qlock); in snd_timer_user_tinterrupt()
1419 if (tu->last_resolution != resolution || ticks > 0) { in snd_timer_user_tinterrupt()
1425 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && in snd_timer_user_tinterrupt()
1426 tu->last_resolution != resolution) { in snd_timer_user_tinterrupt()
1432 tu->last_resolution = resolution; in snd_timer_user_tinterrupt()
1435 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) in snd_timer_user_tinterrupt()
1439 if (tu->qused > 0) { in snd_timer_user_tinterrupt()
1440 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; in snd_timer_user_tinterrupt()
1441 r = &tu->tqueue[prev]; in snd_timer_user_tinterrupt()
1442 if (r->event == SNDRV_TIMER_EVENT_TICK) { in snd_timer_user_tinterrupt()
1443 r->tstamp_sec = tstamp.tv_sec; in snd_timer_user_tinterrupt()
1444 r->tstamp_nsec = tstamp.tv_nsec; in snd_timer_user_tinterrupt()
1445 r->val += ticks; in snd_timer_user_tinterrupt()
1457 spin_unlock(&tu->qlock); in snd_timer_user_tinterrupt()
1460 snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); in snd_timer_user_tinterrupt()
1461 wake_up(&tu->qchange_sleep); in snd_timer_user_tinterrupt()
1469 if (tu->tread) { in realloc_user_queue()
1472 return -ENOMEM; in realloc_user_queue()
1476 return -ENOMEM; in realloc_user_queue()
1479 spin_lock_irq(&tu->qlock); in realloc_user_queue()
1480 kfree(tu->queue); in realloc_user_queue()
1481 kfree(tu->tqueue); in realloc_user_queue()
1482 tu->queue_size = size; in realloc_user_queue()
1483 tu->queue = queue; in realloc_user_queue()
1484 tu->tqueue = tqueue; in realloc_user_queue()
1485 tu->qhead = tu->qtail = tu->qused = 0; in realloc_user_queue()
1486 spin_unlock_irq(&tu->qlock); in realloc_user_queue()
1502 return -ENOMEM; in snd_timer_user_open()
1503 spin_lock_init(&tu->qlock); in snd_timer_user_open()
1504 init_waitqueue_head(&tu->qchange_sleep); in snd_timer_user_open()
1505 mutex_init(&tu->ioctl_lock); in snd_timer_user_open()
1506 tu->ticks = 1; in snd_timer_user_open()
1509 return -ENOMEM; in snd_timer_user_open()
1511 file->private_data = tu; in snd_timer_user_open()
1519 if (file->private_data) { in snd_timer_user_release()
1520 tu = file->private_data; in snd_timer_user_release()
1521 file->private_data = NULL; in snd_timer_user_release()
1522 mutex_lock(&tu->ioctl_lock); in snd_timer_user_release()
1523 if (tu->timeri) { in snd_timer_user_release()
1524 snd_timer_close(tu->timeri); in snd_timer_user_release()
1525 snd_timer_instance_free(tu->timeri); in snd_timer_user_release()
1527 mutex_unlock(&tu->ioctl_lock); in snd_timer_user_release()
1528 snd_fasync_free(tu->fasync); in snd_timer_user_release()
1529 kfree(tu->queue); in snd_timer_user_release()
1530 kfree(tu->tqueue); in snd_timer_user_release()
1538 id->dev_class = SNDRV_TIMER_CLASS_NONE; in snd_timer_user_zero_id()
1539 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; in snd_timer_user_zero_id()
1540 id->card = -1; in snd_timer_user_zero_id()
1541 id->device = -1; in snd_timer_user_zero_id()
1542 id->subdevice = -1; in snd_timer_user_zero_id()
1545 static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) in snd_timer_user_copy_id() argument
1547 id->dev_class = timer->tmr_class; in snd_timer_user_copy_id()
1548 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; in snd_timer_user_copy_id()
1549 id->card = timer->card ? timer->card->number : -1; in snd_timer_user_copy_id()
1550 id->device = timer->tmr_device; in snd_timer_user_copy_id()
1551 id->subdevice = timer->tmr_subdevice; in snd_timer_user_copy_id()
1557 struct snd_timer *timer; in snd_timer_user_next_device() local
1561 return -EFAULT; in snd_timer_user_next_device()
1567 timer = list_entry(snd_timer_list.next, in snd_timer_user_next_device()
1569 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1576 timer = list_entry(p, struct snd_timer, device_list); in snd_timer_user_next_device()
1577 if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { in snd_timer_user_next_device()
1578 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1581 if (timer->tmr_device >= id.device) { in snd_timer_user_next_device()
1582 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1604 timer = list_entry(p, struct snd_timer, device_list); in snd_timer_user_next_device()
1605 if (timer->tmr_class > id.dev_class) { in snd_timer_user_next_device()
1606 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1609 if (timer->tmr_class < id.dev_class) in snd_timer_user_next_device()
1611 if (timer->card->number > id.card) { in snd_timer_user_next_device()
1612 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1615 if (timer->card->number < id.card) in snd_timer_user_next_device()
1617 if (timer->tmr_device > id.device) { in snd_timer_user_next_device()
1618 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1621 if (timer->tmr_device < id.device) in snd_timer_user_next_device()
1623 if (timer->tmr_subdevice > id.subdevice) { in snd_timer_user_next_device()
1624 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1627 if (timer->tmr_subdevice < id.subdevice) in snd_timer_user_next_device()
1629 snd_timer_user_copy_id(&id, timer); in snd_timer_user_next_device()
1641 return -EFAULT; in snd_timer_user_next_device()
1658 tid = ginfo->tid; in snd_timer_user_ginfo()
1660 ginfo->tid = tid; in snd_timer_user_ginfo()
1664 ginfo->card = t->card ? t->card->number : -1; in snd_timer_user_ginfo()
1665 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) in snd_timer_user_ginfo()
1666 ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; in snd_timer_user_ginfo()
1667 strscpy(ginfo->id, t->id, sizeof(ginfo->id)); in snd_timer_user_ginfo()
1668 strscpy(ginfo->name, t->name, sizeof(ginfo->name)); in snd_timer_user_ginfo()
1669 spin_lock_irq(&t->lock); in snd_timer_user_ginfo()
1670 ginfo->resolution = snd_timer_hw_resolution(t); in snd_timer_user_ginfo()
1671 spin_unlock_irq(&t->lock); in snd_timer_user_ginfo()
1672 if (t->hw.resolution_min > 0) { in snd_timer_user_ginfo()
1673 ginfo->resolution_min = t->hw.resolution_min; in snd_timer_user_ginfo()
1674 ginfo->resolution_max = t->hw.resolution_max; in snd_timer_user_ginfo()
1676 list_for_each(p, &t->open_list_head) { in snd_timer_user_ginfo()
1677 ginfo->clients++; in snd_timer_user_ginfo()
1680 err = -ENODEV; in snd_timer_user_ginfo()
1684 err = -EFAULT; in snd_timer_user_ginfo()
1695 t = snd_timer_find(&gparams->tid); in timer_set_gparams()
1697 err = -ENODEV; in timer_set_gparams()
1700 if (!list_empty(&t->open_list_head)) { in timer_set_gparams()
1701 err = -EBUSY; in timer_set_gparams()
1704 if (!t->hw.set_period) { in timer_set_gparams()
1705 err = -ENOSYS; in timer_set_gparams()
1708 err = t->hw.set_period(t, gparams->period_num, gparams->period_den); in timer_set_gparams()
1720 return -EFAULT; in snd_timer_user_gparams()
1733 return -EFAULT; in snd_timer_user_gstatus()
1740 spin_lock_irq(&t->lock); in snd_timer_user_gstatus()
1742 if (t->hw.precise_resolution) { in snd_timer_user_gstatus()
1743 t->hw.precise_resolution(t, &gstatus.resolution_num, in snd_timer_user_gstatus()
1749 spin_unlock_irq(&t->lock); in snd_timer_user_gstatus()
1751 err = -ENODEV; in snd_timer_user_gstatus()
1755 err = -EFAULT; in snd_timer_user_gstatus()
1767 tu = file->private_data; in snd_timer_user_tselect()
1768 if (tu->timeri) { in snd_timer_user_tselect()
1769 snd_timer_close(tu->timeri); in snd_timer_user_tselect()
1770 snd_timer_instance_free(tu->timeri); in snd_timer_user_tselect()
1771 tu->timeri = NULL; in snd_timer_user_tselect()
1774 err = -EFAULT; in snd_timer_user_tselect()
1777 sprintf(str, "application %i", current->pid); in snd_timer_user_tselect()
1780 tu->timeri = snd_timer_instance_new(str); in snd_timer_user_tselect()
1781 if (!tu->timeri) { in snd_timer_user_tselect()
1782 err = -ENOMEM; in snd_timer_user_tselect()
1786 tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; in snd_timer_user_tselect()
1787 tu->timeri->callback = tu->tread in snd_timer_user_tselect()
1789 tu->timeri->ccallback = snd_timer_user_ccallback; in snd_timer_user_tselect()
1790 tu->timeri->callback_data = (void *)tu; in snd_timer_user_tselect()
1791 tu->timeri->disconnect = snd_timer_user_disconnect; in snd_timer_user_tselect()
1793 err = snd_timer_open(tu->timeri, &tselect.id, current->pid); in snd_timer_user_tselect()
1795 snd_timer_instance_free(tu->timeri); in snd_timer_user_tselect()
1796 tu->timeri = NULL; in snd_timer_user_tselect()
1811 tu = file->private_data; in snd_timer_user_info()
1812 if (!tu->timeri) in snd_timer_user_info()
1813 return -EBADFD; in snd_timer_user_info()
1814 t = tu->timeri->timer; in snd_timer_user_info()
1816 return -EBADFD; in snd_timer_user_info()
1820 return -ENOMEM; in snd_timer_user_info()
1821 info->card = t->card ? t->card->number : -1; in snd_timer_user_info()
1822 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) in snd_timer_user_info()
1823 info->flags |= SNDRV_TIMER_FLG_SLAVE; in snd_timer_user_info()
1824 strscpy(info->id, t->id, sizeof(info->id)); in snd_timer_user_info()
1825 strscpy(info->name, t->name, sizeof(info->name)); in snd_timer_user_info()
1826 spin_lock_irq(&t->lock); in snd_timer_user_info()
1827 info->resolution = snd_timer_hw_resolution(t); in snd_timer_user_info()
1828 spin_unlock_irq(&t->lock); in snd_timer_user_info()
1830 err = -EFAULT; in snd_timer_user_info()
1843 tu = file->private_data; in snd_timer_user_params()
1844 if (!tu->timeri) in snd_timer_user_params()
1845 return -EBADFD; in snd_timer_user_params()
1846 t = tu->timeri->timer; in snd_timer_user_params()
1848 return -EBADFD; in snd_timer_user_params()
1850 return -EFAULT; in snd_timer_user_params()
1851 if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { in snd_timer_user_params()
1855 err = -EINVAL; in snd_timer_user_params()
1860 resolution = snd_timer_resolution(tu->timeri); in snd_timer_user_params()
1863 err = -EINVAL; in snd_timer_user_params()
1869 err = -EINVAL; in snd_timer_user_params()
1886 err = -EINVAL; in snd_timer_user_params()
1889 snd_timer_stop(tu->timeri); in snd_timer_user_params()
1890 spin_lock_irq(&t->lock); in snd_timer_user_params()
1891 tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| in snd_timer_user_params()
1895 tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; in snd_timer_user_params()
1897 tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; in snd_timer_user_params()
1899 tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; in snd_timer_user_params()
1900 spin_unlock_irq(&t->lock); in snd_timer_user_params()
1902 (unsigned int)tu->queue_size != params.queue_size) { in snd_timer_user_params()
1907 spin_lock_irq(&tu->qlock); in snd_timer_user_params()
1908 tu->qhead = tu->qtail = tu->qused = 0; in snd_timer_user_params()
1909 if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { in snd_timer_user_params()
1910 if (tu->tread) { in snd_timer_user_params()
1919 struct snd_timer_read *r = &tu->queue[0]; in snd_timer_user_params()
1920 r->resolution = 0; in snd_timer_user_params()
1921 r->ticks = 0; in snd_timer_user_params()
1922 tu->qused++; in snd_timer_user_params()
1923 tu->qtail++; in snd_timer_user_params()
1926 tu->filter = params.filter; in snd_timer_user_params()
1927 tu->ticks = params.ticks; in snd_timer_user_params()
1928 spin_unlock_irq(&tu->qlock); in snd_timer_user_params()
1932 return -EFAULT; in snd_timer_user_params()
1942 tu = file->private_data; in snd_timer_user_status32()
1943 if (!tu->timeri) in snd_timer_user_status32()
1944 return -EBADFD; in snd_timer_user_status32()
1946 status.tstamp_sec = tu->tstamp.tv_sec; in snd_timer_user_status32()
1947 status.tstamp_nsec = tu->tstamp.tv_nsec; in snd_timer_user_status32()
1948 status.resolution = snd_timer_resolution(tu->timeri); in snd_timer_user_status32()
1949 status.lost = tu->timeri->lost; in snd_timer_user_status32()
1950 status.overrun = tu->overrun; in snd_timer_user_status32()
1951 spin_lock_irq(&tu->qlock); in snd_timer_user_status32()
1952 status.queue = tu->qused; in snd_timer_user_status32()
1953 spin_unlock_irq(&tu->qlock); in snd_timer_user_status32()
1955 return -EFAULT; in snd_timer_user_status32()
1965 tu = file->private_data; in snd_timer_user_status64()
1966 if (!tu->timeri) in snd_timer_user_status64()
1967 return -EBADFD; in snd_timer_user_status64()
1969 status.tstamp_sec = tu->tstamp.tv_sec; in snd_timer_user_status64()
1970 status.tstamp_nsec = tu->tstamp.tv_nsec; in snd_timer_user_status64()
1971 status.resolution = snd_timer_resolution(tu->timeri); in snd_timer_user_status64()
1972 status.lost = tu->timeri->lost; in snd_timer_user_status64()
1973 status.overrun = tu->overrun; in snd_timer_user_status64()
1974 spin_lock_irq(&tu->qlock); in snd_timer_user_status64()
1975 status.queue = tu->qused; in snd_timer_user_status64()
1976 spin_unlock_irq(&tu->qlock); in snd_timer_user_status64()
1978 return -EFAULT; in snd_timer_user_status64()
1987 tu = file->private_data; in snd_timer_user_start()
1988 if (!tu->timeri) in snd_timer_user_start()
1989 return -EBADFD; in snd_timer_user_start()
1990 snd_timer_stop(tu->timeri); in snd_timer_user_start()
1991 tu->timeri->lost = 0; in snd_timer_user_start()
1992 tu->last_resolution = 0; in snd_timer_user_start()
1993 err = snd_timer_start(tu->timeri, tu->ticks); in snd_timer_user_start()
2004 tu = file->private_data; in snd_timer_user_stop()
2005 if (!tu->timeri) in snd_timer_user_stop()
2006 return -EBADFD; in snd_timer_user_stop()
2007 err = snd_timer_stop(tu->timeri); in snd_timer_user_stop()
2018 tu = file->private_data; in snd_timer_user_continue()
2019 if (!tu->timeri) in snd_timer_user_continue()
2020 return -EBADFD; in snd_timer_user_continue()
2021 /* start timer instead of continue if it's not used before */ in snd_timer_user_continue()
2022 if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) in snd_timer_user_continue()
2024 tu->timeri->lost = 0; in snd_timer_user_continue()
2025 err = snd_timer_continue(tu->timeri); in snd_timer_user_continue()
2036 tu = file->private_data; in snd_timer_user_pause()
2037 if (!tu->timeri) in snd_timer_user_pause()
2038 return -EBADFD; in snd_timer_user_pause()
2039 err = snd_timer_pause(tu->timeri); in snd_timer_user_pause()
2051 if (tu->timeri) /* too late */ in snd_timer_user_tread()
2052 return -EBUSY; in snd_timer_user_tread()
2054 return -EFAULT; in snd_timer_user_tread()
2056 old_tread = tu->tread; in snd_timer_user_tread()
2059 tu->tread = TREAD_FORMAT_NONE; in snd_timer_user_tread()
2062 tu->tread = TREAD_FORMAT_TIME64; in snd_timer_user_tread()
2064 tu->tread = TREAD_FORMAT_TIME32; in snd_timer_user_tread()
2066 if (tu->tread != old_tread && in snd_timer_user_tread()
2067 realloc_user_queue(tu, tu->queue_size) < 0) { in snd_timer_user_tread()
2068 tu->tread = old_tread; in snd_timer_user_tread()
2069 return -ENOMEM; in snd_timer_user_tread()
2089 tu = file->private_data; in __snd_timer_user_ioctl()
2092 return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; in __snd_timer_user_ioctl()
2127 return -ENOTTY; in __snd_timer_user_ioctl()
2133 struct snd_timer_user *tu = file->private_data; in snd_timer_user_ioctl()
2136 mutex_lock(&tu->ioctl_lock); in snd_timer_user_ioctl()
2138 mutex_unlock(&tu->ioctl_lock); in snd_timer_user_ioctl()
2146 tu = file->private_data; in snd_timer_user_fasync()
2147 return snd_fasync_helper(fd, file, on, &tu->fasync); in snd_timer_user_fasync()
2160 tu = file->private_data; in snd_timer_user_read()
2161 switch (tu->tread) { in snd_timer_user_read()
2173 return -ENOTSUPP; in snd_timer_user_read()
2176 mutex_lock(&tu->ioctl_lock); in snd_timer_user_read()
2177 spin_lock_irq(&tu->qlock); in snd_timer_user_read()
2178 while ((long)count - result >= unit) { in snd_timer_user_read()
2179 while (!tu->qused) { in snd_timer_user_read()
2182 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { in snd_timer_user_read()
2183 err = -EAGAIN; in snd_timer_user_read()
2189 add_wait_queue(&tu->qchange_sleep, &wait); in snd_timer_user_read()
2191 spin_unlock_irq(&tu->qlock); in snd_timer_user_read()
2192 mutex_unlock(&tu->ioctl_lock); in snd_timer_user_read()
2194 mutex_lock(&tu->ioctl_lock); in snd_timer_user_read()
2195 spin_lock_irq(&tu->qlock); in snd_timer_user_read()
2197 remove_wait_queue(&tu->qchange_sleep, &wait); in snd_timer_user_read()
2199 if (tu->disconnected) { in snd_timer_user_read()
2200 err = -ENODEV; in snd_timer_user_read()
2204 err = -ERESTARTSYS; in snd_timer_user_read()
2209 qhead = tu->qhead++; in snd_timer_user_read()
2210 tu->qhead %= tu->queue_size; in snd_timer_user_read()
2211 tu->qused--; in snd_timer_user_read()
2212 spin_unlock_irq(&tu->qlock); in snd_timer_user_read()
2214 tread = &tu->tqueue[qhead]; in snd_timer_user_read()
2216 switch (tu->tread) { in snd_timer_user_read()
2220 err = -EFAULT; in snd_timer_user_read()
2225 .event = tread->event, in snd_timer_user_read()
2226 .tstamp_sec = tread->tstamp_sec, in snd_timer_user_read()
2227 .tstamp_nsec = tread->tstamp_nsec, in snd_timer_user_read()
2228 .val = tread->val, in snd_timer_user_read()
2232 err = -EFAULT; in snd_timer_user_read()
2235 if (copy_to_user(buffer, &tu->queue[qhead], in snd_timer_user_read()
2237 err = -EFAULT; in snd_timer_user_read()
2240 err = -ENOTSUPP; in snd_timer_user_read()
2244 spin_lock_irq(&tu->qlock); in snd_timer_user_read()
2251 spin_unlock_irq(&tu->qlock); in snd_timer_user_read()
2252 mutex_unlock(&tu->ioctl_lock); in snd_timer_user_read()
2261 tu = file->private_data; in snd_timer_user_poll()
2263 poll_wait(file, &tu->qchange_sleep, wait); in snd_timer_user_poll()
2266 spin_lock_irq(&tu->qlock); in snd_timer_user_poll()
2267 if (tu->qused) in snd_timer_user_poll()
2269 if (tu->disconnected) in snd_timer_user_poll()
2271 spin_unlock_irq(&tu->qlock); in snd_timer_user_poll()
2295 /* unregister the system timer */
2298 struct snd_timer *timer, *n; in snd_timer_free_all() local
2300 list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) in snd_timer_free_all()
2301 snd_timer_free(timer); in snd_timer_free_all()
2317 dev_set_name(timer_dev, "timer"); in alsa_timer_init()
2320 snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, in alsa_timer_init()
2321 "system timer"); in alsa_timer_init()
2326 pr_err("ALSA: unable to register system timer (%i)\n", err); in alsa_timer_init()
2333 pr_err("ALSA: unable to register timer device (%i)\n", err); in alsa_timer_init()
2353 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); in alsa_timer_exit()