20 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer);
21 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer);
23 static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in __rtc_read_time()  argument
26 	if (!rtc->ops)  in __rtc_read_time()
28 	else if (!rtc->ops->read_time)  in __rtc_read_time()
32 		err = rtc->ops->read_time(rtc->dev.parent, tm);  in __rtc_read_time()
34 			dev_dbg(&rtc->dev, "read_time: fail to read: %d\n",  in __rtc_read_time()
41 			dev_dbg(&rtc->dev, "read_time: rtc_time isn't valid\n");  in __rtc_read_time()
46 int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_read_time()  argument
50 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_time()
54 	err = __rtc_read_time(rtc, tm);  in rtc_read_time()
55 	mutex_unlock(&rtc->ops_lock);  in rtc_read_time()
60 int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_set_time()  argument
68 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_time()
72 	if (!rtc->ops)  in rtc_set_time()
74 	else if (rtc->ops->set_time)  in rtc_set_time()
75 		err = rtc->ops->set_time(rtc->dev.parent, tm);  in rtc_set_time()
76 	else if (rtc->ops->set_mmss64) {  in rtc_set_time()
79 		err = rtc->ops->set_mmss64(rtc->dev.parent, secs64);  in rtc_set_time()
80 	} else if (rtc->ops->set_mmss) {  in rtc_set_time()
82 		err = rtc->ops->set_mmss(rtc->dev.parent, secs64);  in rtc_set_time()
86 	pm_stay_awake(rtc->dev.parent);  in rtc_set_time()
87 	mutex_unlock(&rtc->ops_lock);  in rtc_set_time()
89 	schedule_work(&rtc->irqwork);  in rtc_set_time()
94 static int rtc_read_alarm_internal(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_read_alarm_internal()  argument
98 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm_internal()
102 	if (rtc->ops == NULL)  in rtc_read_alarm_internal()
104 	else if (!rtc->ops->read_alarm)  in rtc_read_alarm_internal()
108 		err = rtc->ops->read_alarm(rtc->dev.parent, alarm);  in rtc_read_alarm_internal()
111 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm_internal()
115 int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_read_alarm()  argument
166 	err = rtc_read_time(rtc, &before);  in __rtc_read_alarm()
175 		err = rtc_read_alarm_internal(rtc, alarm);  in __rtc_read_alarm()
184 		err = rtc_read_time(rtc, &now);  in __rtc_read_alarm()
234 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "day");  in __rtc_read_alarm()
245 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month");  in __rtc_read_alarm()
260 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");  in __rtc_read_alarm()
268 		dev_warn(&rtc->dev, "alarm rollover not handled\n");  in __rtc_read_alarm()
275 		dev_warn(&rtc->dev, "invalid alarm value: %d-%d-%d %d:%d:%d\n",  in __rtc_read_alarm()
284 int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_read_alarm()  argument
288 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm()
291 	if (rtc->ops == NULL)  in rtc_read_alarm()
293 	else if (!rtc->ops->read_alarm)  in rtc_read_alarm()
297 		alarm->enabled = rtc->aie_timer.enabled;  in rtc_read_alarm()
298 		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);  in rtc_read_alarm()
300 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm()
306 static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_set_alarm()  argument
318 	err = __rtc_read_time(rtc, &tm);  in __rtc_set_alarm()
331 	if (!rtc->ops)  in __rtc_set_alarm()
333 	else if (!rtc->ops->set_alarm)  in __rtc_set_alarm()
336 		err = rtc->ops->set_alarm(rtc->dev.parent, alarm);  in __rtc_set_alarm()
341 int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_set_alarm()  argument
349 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_alarm()
352 	if (rtc->aie_timer.enabled)  in rtc_set_alarm()
353 		rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_set_alarm()
355 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);  in rtc_set_alarm()
356 	rtc->aie_timer.period = ktime_set(0, 0);  in rtc_set_alarm()
358 		err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_set_alarm()
360 	mutex_unlock(&rtc->ops_lock);  in rtc_set_alarm()
366 int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_initialize_alarm()  argument
375 	err = rtc_read_time(rtc, &now);  in rtc_initialize_alarm()
379 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_initialize_alarm()
383 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);  in rtc_initialize_alarm()
384 	rtc->aie_timer.period = ktime_set(0, 0);  in rtc_initialize_alarm()
388 			 rtc->aie_timer.node.expires.tv64)) {  in rtc_initialize_alarm()
390 		rtc->aie_timer.enabled = 1;  in rtc_initialize_alarm()
391 		timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node);  in rtc_initialize_alarm()
393 	mutex_unlock(&rtc->ops_lock);  in rtc_initialize_alarm()
400 int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_alarm_irq_enable()  argument
402 	int err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_alarm_irq_enable()
406 	if (rtc->aie_timer.enabled != enabled) {  in rtc_alarm_irq_enable()
408 			err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
410 			rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
415 	else if (!rtc->ops)  in rtc_alarm_irq_enable()
417 	else if (!rtc->ops->alarm_irq_enable)  in rtc_alarm_irq_enable()
420 		err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled);  in rtc_alarm_irq_enable()
422 	mutex_unlock(&rtc->ops_lock);  in rtc_alarm_irq_enable()
427 int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_update_irq_enable()  argument
429 	int err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_update_irq_enable()
434 	if (enabled == 0 && rtc->uie_irq_active) {  in rtc_update_irq_enable()
435 		mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
436 		return rtc_dev_update_irq_enable_emul(rtc, 0);  in rtc_update_irq_enable()
440 	if (rtc->uie_rtctimer.enabled == enabled)  in rtc_update_irq_enable()
443 	if (rtc->uie_unsupported) {  in rtc_update_irq_enable()
452 		__rtc_read_time(rtc, &tm);  in rtc_update_irq_enable()
455 		rtc->uie_rtctimer.node.expires = ktime_add(now, onesec);  in rtc_update_irq_enable()
456 		rtc->uie_rtctimer.period = ktime_set(1, 0);  in rtc_update_irq_enable()
457 		err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
459 		rtc_timer_remove(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
462 	mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
471 		err = rtc_dev_update_irq_enable_emul(rtc, enabled);  in rtc_update_irq_enable()
488 void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)  in rtc_handle_legacy_irq()  argument
493 	spin_lock_irqsave(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
494 	rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode);  in rtc_handle_legacy_irq()
495 	spin_unlock_irqrestore(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
498 	spin_lock_irqsave(&rtc->irq_task_lock, flags);  in rtc_handle_legacy_irq()
499 	if (rtc->irq_task)  in rtc_handle_legacy_irq()
500 		rtc->irq_task->func(rtc->irq_task->private_data);  in rtc_handle_legacy_irq()
501 	spin_unlock_irqrestore(&rtc->irq_task_lock, flags);  in rtc_handle_legacy_irq()
503 	wake_up_interruptible(&rtc->irq_queue);  in rtc_handle_legacy_irq()
504 	kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);  in rtc_handle_legacy_irq()
516 	struct rtc_device *rtc = (struct rtc_device *)private;  in rtc_aie_update_irq()  local
517 	rtc_handle_legacy_irq(rtc, 1, RTC_AF);  in rtc_aie_update_irq()
529 	struct rtc_device *rtc = (struct rtc_device *)private;  in rtc_uie_update_irq()  local
530 	rtc_handle_legacy_irq(rtc, 1,  RTC_UF);  in rtc_uie_update_irq()
544 	struct rtc_device *rtc;  in rtc_pie_update_irq()  local
547 	rtc = container_of(timer, struct rtc_device, pie_timer);  in rtc_pie_update_irq()
549 	period = ktime_set(0, NSEC_PER_SEC/rtc->irq_freq);  in rtc_pie_update_irq()
552 	rtc_handle_legacy_irq(rtc, count, RTC_PF);  in rtc_pie_update_irq()
564 void rtc_update_irq(struct rtc_device *rtc,  in rtc_update_irq()  argument
567 	if (IS_ERR_OR_NULL(rtc))  in rtc_update_irq()
570 	pm_stay_awake(rtc->dev.parent);  in rtc_update_irq()
571 	schedule_work(&rtc->irqwork);  in rtc_update_irq()
587 	struct rtc_device *rtc = NULL;  in rtc_class_open()  local
591 		rtc = to_rtc_device(dev);  in rtc_class_open()
593 	if (rtc) {  in rtc_class_open()
594 		if (!try_module_get(rtc->owner)) {  in rtc_class_open()
596 			rtc = NULL;  in rtc_class_open()
600 	return rtc;  in rtc_class_open()
604 void rtc_class_close(struct rtc_device *rtc)  in rtc_class_close()  argument
606 	module_put(rtc->owner);  in rtc_class_close()
607 	put_device(&rtc->dev);  in rtc_class_close()
611 int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task)  in rtc_irq_register()  argument
619 	if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))  in rtc_irq_register()
622 	spin_lock_irq(&rtc->irq_task_lock);  in rtc_irq_register()
623 	if (rtc->irq_task == NULL) {  in rtc_irq_register()
624 		rtc->irq_task = task;  in rtc_irq_register()
627 	spin_unlock_irq(&rtc->irq_task_lock);  in rtc_irq_register()
629 	clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);  in rtc_irq_register()
635 void rtc_irq_unregister(struct rtc_device *rtc, struct rtc_task *task)  in rtc_irq_unregister()  argument
637 	spin_lock_irq(&rtc->irq_task_lock);  in rtc_irq_unregister()
638 	if (rtc->irq_task == task)  in rtc_irq_unregister()
639 		rtc->irq_task = NULL;  in rtc_irq_unregister()
640 	spin_unlock_irq(&rtc->irq_task_lock);  in rtc_irq_unregister()
644 static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)  in rtc_update_hrtimer()  argument
656 	if (hrtimer_try_to_cancel(&rtc->pie_timer) < 0)  in rtc_update_hrtimer()
660 		ktime_t period = ktime_set(0, NSEC_PER_SEC / rtc->irq_freq);  in rtc_update_hrtimer()
662 		hrtimer_start(&rtc->pie_timer, period, HRTIMER_MODE_REL);  in rtc_update_hrtimer()
677 int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled)  in rtc_irq_set_state()  argument
683 	spin_lock_irqsave(&rtc->irq_task_lock, flags);  in rtc_irq_set_state()
684 	if (rtc->irq_task != NULL && task == NULL)  in rtc_irq_set_state()
686 	else if (rtc->irq_task != task)  in rtc_irq_set_state()
689 		if (rtc_update_hrtimer(rtc, enabled) < 0) {  in rtc_irq_set_state()
690 			spin_unlock_irqrestore(&rtc->irq_task_lock, flags);  in rtc_irq_set_state()
694 		rtc->pie_enabled = enabled;  in rtc_irq_set_state()
696 	spin_unlock_irqrestore(&rtc->irq_task_lock, flags);  in rtc_irq_set_state()
711 int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq)  in rtc_irq_set_freq()  argument
719 	spin_lock_irqsave(&rtc->irq_task_lock, flags);  in rtc_irq_set_freq()
720 	if (rtc->irq_task != NULL && task == NULL)  in rtc_irq_set_freq()
722 	else if (rtc->irq_task != task)  in rtc_irq_set_freq()
725 		rtc->irq_freq = freq;  in rtc_irq_set_freq()
726 		if (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) {  in rtc_irq_set_freq()
727 			spin_unlock_irqrestore(&rtc->irq_task_lock, flags);  in rtc_irq_set_freq()
732 	spin_unlock_irqrestore(&rtc->irq_task_lock, flags);  in rtc_irq_set_freq()
749 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_enqueue()  argument
752 	timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
753 	if (&timer->node == timerqueue_getnext(&rtc->timerqueue)) {  in rtc_timer_enqueue()
758 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_enqueue()
760 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_enqueue()
761 			schedule_work(&rtc->irqwork);  in rtc_timer_enqueue()
763 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
771 static void rtc_alarm_disable(struct rtc_device *rtc)  in rtc_alarm_disable()  argument
773 	if (!rtc->ops || !rtc->ops->alarm_irq_enable)  in rtc_alarm_disable()
776 	rtc->ops->alarm_irq_enable(rtc->dev.parent, false);  in rtc_alarm_disable()
791 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_remove()  argument
793 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
794 	timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_remove()
799 		next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
801 			rtc_alarm_disable(rtc);  in rtc_timer_remove()
806 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_remove()
808 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_remove()
809 			schedule_work(&rtc->irqwork);  in rtc_timer_remove()
831 	struct rtc_device *rtc =  in rtc_timer_do_work()  local
834 	mutex_lock(&rtc->ops_lock);  in rtc_timer_do_work()
836 	__rtc_read_time(rtc, &tm);  in rtc_timer_do_work()
838 	while ((next = timerqueue_getnext(&rtc->timerqueue))) {  in rtc_timer_do_work()
844 		timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
854 			timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
867 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_do_work()
875 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
877 			dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);  in rtc_timer_do_work()
881 		rtc_alarm_disable(rtc);  in rtc_timer_do_work()
883 	pm_relax(rtc->dev.parent);  in rtc_timer_do_work()
884 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_do_work()
911 int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,  in rtc_timer_start()  argument
915 	mutex_lock(&rtc->ops_lock);  in rtc_timer_start()
917 		rtc_timer_remove(rtc, timer);  in rtc_timer_start()
922 	ret = rtc_timer_enqueue(rtc, timer);  in rtc_timer_start()
924 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_start()
934 void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_cancel()  argument
936 	mutex_lock(&rtc->ops_lock);  in rtc_timer_cancel()
938 		rtc_timer_remove(rtc, timer);  in rtc_timer_cancel()
939 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_cancel()