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 void rtc_add_offset(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_add_offset()  argument
27 	if (!rtc->offset_secs)  in rtc_add_offset()
38 	if ((rtc->start_secs > rtc->range_min && secs >= rtc->start_secs) ||  in rtc_add_offset()
39 	    (rtc->start_secs < rtc->range_min &&  in rtc_add_offset()
40 	     secs <= (rtc->start_secs + rtc->range_max - rtc->range_min)))  in rtc_add_offset()
43 	rtc_time64_to_tm(secs + rtc->offset_secs, tm);  in rtc_add_offset()
46 static void rtc_subtract_offset(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_subtract_offset()  argument
50 	if (!rtc->offset_secs)  in rtc_subtract_offset()
61 	if (secs >= rtc->range_min && secs <= rtc->range_max)  in rtc_subtract_offset()
64 	rtc_time64_to_tm(secs - rtc->offset_secs, tm);  in rtc_subtract_offset()
67 static int rtc_valid_range(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_valid_range()  argument
69 	if (rtc->range_min != rtc->range_max) {  in rtc_valid_range()
71 		time64_t range_min = rtc->set_start_time ? rtc->start_secs :  in rtc_valid_range()
72 			rtc->range_min;  in rtc_valid_range()
73 		timeu64_t range_max = rtc->set_start_time ?  in rtc_valid_range()
74 			(rtc->start_secs + rtc->range_max - rtc->range_min) :  in rtc_valid_range()
75 			rtc->range_max;  in rtc_valid_range()
84 static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in __rtc_read_time()  argument
88 	if (!rtc->ops) {  in __rtc_read_time()
90 	} else if (!rtc->ops->read_time) {  in __rtc_read_time()
94 		err = rtc->ops->read_time(rtc->dev.parent, tm);  in __rtc_read_time()
96 			dev_dbg(&rtc->dev, "read_time: fail to read: %d\n",  in __rtc_read_time()
101 		rtc_add_offset(rtc, tm);  in __rtc_read_time()
105 			dev_dbg(&rtc->dev, "read_time: rtc_time isn't valid\n");  in __rtc_read_time()
110 int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_read_time()  argument
114 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_time()
118 	err = __rtc_read_time(rtc, tm);  in rtc_read_time()
119 	mutex_unlock(&rtc->ops_lock);  in rtc_read_time()
126 int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_set_time()  argument
134 	err = rtc_valid_range(rtc, tm);  in rtc_set_time()
138 	rtc_subtract_offset(rtc, tm);  in rtc_set_time()
141 	uie = rtc->uie_rtctimer.enabled || rtc->uie_irq_active;  in rtc_set_time()
143 	uie = rtc->uie_rtctimer.enabled;  in rtc_set_time()
146 		err = rtc_update_irq_enable(rtc, 0);  in rtc_set_time()
151 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_time()
155 	if (!rtc->ops)  in rtc_set_time()
157 	else if (rtc->ops->set_time)  in rtc_set_time()
158 		err = rtc->ops->set_time(rtc->dev.parent, tm);  in rtc_set_time()
162 	pm_stay_awake(rtc->dev.parent);  in rtc_set_time()
163 	mutex_unlock(&rtc->ops_lock);  in rtc_set_time()
165 	schedule_work(&rtc->irqwork);  in rtc_set_time()
168 		err = rtc_update_irq_enable(rtc, 1);  in rtc_set_time()
178 static int rtc_read_alarm_internal(struct rtc_device *rtc,  in rtc_read_alarm_internal()  argument
183 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm_internal()
187 	if (!rtc->ops) {  in rtc_read_alarm_internal()
189 	} else if (!test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops->read_alarm) {  in rtc_read_alarm_internal()
203 		err = rtc->ops->read_alarm(rtc->dev.parent, alarm);  in rtc_read_alarm_internal()
206 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm_internal()
212 int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_read_alarm()  argument
263 	err = rtc_read_time(rtc, &before);  in __rtc_read_alarm()
272 		err = rtc_read_alarm_internal(rtc, alarm);  in __rtc_read_alarm()
278 			rtc_add_offset(rtc, &alarm->time);  in __rtc_read_alarm()
283 		err = rtc_read_time(rtc, &now);  in __rtc_read_alarm()
339 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "day");  in __rtc_read_alarm()
350 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month");  in __rtc_read_alarm()
365 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");  in __rtc_read_alarm()
373 		dev_warn(&rtc->dev, "alarm rollover not handled\n");  in __rtc_read_alarm()
380 		dev_warn(&rtc->dev, "invalid alarm value: %ptR\n",  in __rtc_read_alarm()
386 int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_read_alarm()  argument
390 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm()
393 	if (!rtc->ops) {  in rtc_read_alarm()
395 	} else if (!test_bit(RTC_FEATURE_ALARM, rtc->features)) {  in rtc_read_alarm()
399 		alarm->enabled = rtc->aie_timer.enabled;  in rtc_read_alarm()
400 		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);  in rtc_read_alarm()
402 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm()
409 static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_set_alarm()  argument
422 	err = __rtc_read_time(rtc, &tm);  in __rtc_set_alarm()
436 	rtc_subtract_offset(rtc, &alarm->time);  in __rtc_set_alarm()
438 	if (!rtc->ops)  in __rtc_set_alarm()
440 	else if (!test_bit(RTC_FEATURE_ALARM, rtc->features))  in __rtc_set_alarm()
443 		err = rtc->ops->set_alarm(rtc->dev.parent, alarm);  in __rtc_set_alarm()
449 int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_set_alarm()  argument
454 	if (!rtc->ops)  in rtc_set_alarm()
456 	else if (!test_bit(RTC_FEATURE_ALARM, rtc->features))  in rtc_set_alarm()
463 	err = rtc_valid_range(rtc, &alarm->time);  in rtc_set_alarm()
467 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_alarm()
470 	if (rtc->aie_timer.enabled)  in rtc_set_alarm()
471 		rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_set_alarm()
478 	if (test_bit(RTC_FEATURE_ALARM_RES_MINUTE, rtc->features))  in rtc_set_alarm()
481 	rtc->aie_timer.node.expires = alarm_time;  in rtc_set_alarm()
482 	rtc->aie_timer.period = 0;  in rtc_set_alarm()
484 		err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_set_alarm()
486 	mutex_unlock(&rtc->ops_lock);  in rtc_set_alarm()
493 int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_initialize_alarm()  argument
502 	err = rtc_read_time(rtc, &now);  in rtc_initialize_alarm()
506 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_initialize_alarm()
510 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);  in rtc_initialize_alarm()
511 	rtc->aie_timer.period = 0;  in rtc_initialize_alarm()
515 			 rtc->aie_timer.node.expires)) {  in rtc_initialize_alarm()
516 		rtc->aie_timer.enabled = 1;  in rtc_initialize_alarm()
517 		timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node);  in rtc_initialize_alarm()
518 		trace_rtc_timer_enqueue(&rtc->aie_timer);  in rtc_initialize_alarm()
520 	mutex_unlock(&rtc->ops_lock);  in rtc_initialize_alarm()
525 int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_alarm_irq_enable()  argument
529 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_alarm_irq_enable()
533 	if (rtc->aie_timer.enabled != enabled) {  in rtc_alarm_irq_enable()
535 			err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
537 			rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
542 	else if (!rtc->ops)  in rtc_alarm_irq_enable()
544 	else if (!test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops->alarm_irq_enable)  in rtc_alarm_irq_enable()
547 		err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled);  in rtc_alarm_irq_enable()
549 	mutex_unlock(&rtc->ops_lock);  in rtc_alarm_irq_enable()
556 int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_update_irq_enable()  argument
560 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_update_irq_enable()
565 	if (enabled == 0 && rtc->uie_irq_active) {  in rtc_update_irq_enable()
566 		mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
567 		return rtc_dev_update_irq_enable_emul(rtc, 0);  in rtc_update_irq_enable()
571 	if (rtc->uie_rtctimer.enabled == enabled)  in rtc_update_irq_enable()
574 	if (!test_bit(RTC_FEATURE_UPDATE_INTERRUPT, rtc->features) ||  in rtc_update_irq_enable()
575 	    !test_bit(RTC_FEATURE_ALARM, rtc->features)) {  in rtc_update_irq_enable()
576 		mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
578 		return rtc_dev_update_irq_enable_emul(rtc, enabled);  in rtc_update_irq_enable()
588 		err = __rtc_read_time(rtc, &tm);  in rtc_update_irq_enable()
593 		rtc->uie_rtctimer.node.expires = ktime_add(now, onesec);  in rtc_update_irq_enable()
594 		rtc->uie_rtctimer.period = ktime_set(1, 0);  in rtc_update_irq_enable()
595 		err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
597 		rtc_timer_remove(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
601 	mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
617 void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)  in rtc_handle_legacy_irq()  argument
622 	spin_lock_irqsave(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
623 	rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF | mode);  in rtc_handle_legacy_irq()
624 	spin_unlock_irqrestore(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
626 	wake_up_interruptible(&rtc->irq_queue);  in rtc_handle_legacy_irq()
627 	kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);  in rtc_handle_legacy_irq()
636 void rtc_aie_update_irq(struct rtc_device *rtc)  in rtc_aie_update_irq()  argument
638 	rtc_handle_legacy_irq(rtc, 1, RTC_AF);  in rtc_aie_update_irq()
647 void rtc_uie_update_irq(struct rtc_device *rtc)  in rtc_uie_update_irq()  argument
649 	rtc_handle_legacy_irq(rtc, 1,  RTC_UF);  in rtc_uie_update_irq()
662 	struct rtc_device *rtc;  in rtc_pie_update_irq()  local
666 	rtc = container_of(timer, struct rtc_device, pie_timer);  in rtc_pie_update_irq()
668 	period = NSEC_PER_SEC / rtc->irq_freq;  in rtc_pie_update_irq()
671 	rtc_handle_legacy_irq(rtc, count, RTC_PF);  in rtc_pie_update_irq()
683 void rtc_update_irq(struct rtc_device *rtc,  in rtc_update_irq()  argument
686 	if (IS_ERR_OR_NULL(rtc))  in rtc_update_irq()
689 	pm_stay_awake(rtc->dev.parent);  in rtc_update_irq()
690 	schedule_work(&rtc->irqwork);  in rtc_update_irq()
697 	struct rtc_device *rtc = NULL;  in rtc_class_open()  local
701 		rtc = to_rtc_device(dev);  in rtc_class_open()
703 	if (rtc) {  in rtc_class_open()
704 		if (!try_module_get(rtc->owner)) {  in rtc_class_open()
706 			rtc = NULL;  in rtc_class_open()
710 	return rtc;  in rtc_class_open()
714 void rtc_class_close(struct rtc_device *rtc)  in rtc_class_close()  argument
716 	module_put(rtc->owner);  in rtc_class_close()
717 	put_device(&rtc->dev);  in rtc_class_close()
721 static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)  in rtc_update_hrtimer()  argument
733 	if (hrtimer_try_to_cancel(&rtc->pie_timer) < 0)  in rtc_update_hrtimer()
737 		ktime_t period = NSEC_PER_SEC / rtc->irq_freq;  in rtc_update_hrtimer()
739 		hrtimer_start(&rtc->pie_timer, period, HRTIMER_MODE_REL);  in rtc_update_hrtimer()
753 int rtc_irq_set_state(struct rtc_device *rtc, int enabled)  in rtc_irq_set_state()  argument
757 	while (rtc_update_hrtimer(rtc, enabled) < 0)  in rtc_irq_set_state()
760 	rtc->pie_enabled = enabled;  in rtc_irq_set_state()
775 int rtc_irq_set_freq(struct rtc_device *rtc, int freq)  in rtc_irq_set_freq()  argument
782 	rtc->irq_freq = freq;  in rtc_irq_set_freq()
783 	while (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0)  in rtc_irq_set_freq()
802 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_enqueue()  argument
804 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_enqueue()
809 	err = __rtc_read_time(rtc, &tm);  in rtc_timer_enqueue()
823 	timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
830 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_enqueue()
832 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_enqueue()
833 			schedule_work(&rtc->irqwork);  in rtc_timer_enqueue()
835 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
844 static void rtc_alarm_disable(struct rtc_device *rtc)  in rtc_alarm_disable()  argument
846 	if (!rtc->ops || !test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops->alarm_irq_enable)  in rtc_alarm_disable()
849 	rtc->ops->alarm_irq_enable(rtc->dev.parent, false);  in rtc_alarm_disable()
865 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_remove()  argument
867 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
869 	timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_remove()
876 		next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
878 			rtc_alarm_disable(rtc);  in rtc_timer_remove()
883 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_remove()
885 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_remove()
886 			schedule_work(&rtc->irqwork);  in rtc_timer_remove()
907 	struct rtc_device *rtc =  in rtc_timer_do_work()  local
910 	mutex_lock(&rtc->ops_lock);  in rtc_timer_do_work()
912 	__rtc_read_time(rtc, &tm);  in rtc_timer_do_work()
914 	while ((next = timerqueue_getnext(&rtc->timerqueue))) {  in rtc_timer_do_work()
920 		timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
924 			timer->func(timer->rtc);  in rtc_timer_do_work()
932 			timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
946 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_do_work()
954 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
957 			dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);  in rtc_timer_do_work()
961 		rtc_alarm_disable(rtc);  in rtc_timer_do_work()
964 	pm_relax(rtc->dev.parent);  in rtc_timer_do_work()
965 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_do_work()
976 		    struct rtc_device *rtc)  in rtc_timer_init()  argument
981 	timer->rtc = rtc;  in rtc_timer_init()
992 int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,  in rtc_timer_start()  argument
997 	mutex_lock(&rtc->ops_lock);  in rtc_timer_start()
999 		rtc_timer_remove(rtc, timer);  in rtc_timer_start()
1004 	ret = rtc_timer_enqueue(rtc, timer);  in rtc_timer_start()
1006 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_start()
1016 void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_cancel()  argument
1018 	mutex_lock(&rtc->ops_lock);  in rtc_timer_cancel()
1020 		rtc_timer_remove(rtc, timer);  in rtc_timer_cancel()
1021 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_cancel()
1035 int rtc_read_offset(struct rtc_device *rtc, long *offset)  in rtc_read_offset()  argument
1039 	if (!rtc->ops)  in rtc_read_offset()
1042 	if (!rtc->ops->read_offset)  in rtc_read_offset()
1045 	mutex_lock(&rtc->ops_lock);  in rtc_read_offset()
1046 	ret = rtc->ops->read_offset(rtc->dev.parent, offset);  in rtc_read_offset()
1047 	mutex_unlock(&rtc->ops_lock);  in rtc_read_offset()
1070 int rtc_set_offset(struct rtc_device *rtc, long offset)  in rtc_set_offset()  argument
1074 	if (!rtc->ops)  in rtc_set_offset()
1077 	if (!rtc->ops->set_offset)  in rtc_set_offset()
1080 	mutex_lock(&rtc->ops_lock);  in rtc_set_offset()
1081 	ret = rtc->ops->set_offset(rtc->dev.parent, offset);  in rtc_set_offset()
1082 	mutex_unlock(&rtc->ops_lock);  in rtc_set_offset()