23 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer);
24 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer);
26 static void rtc_add_offset(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_add_offset()  argument
30 	if (!rtc->offset_secs)  in rtc_add_offset()
41 	if ((rtc->start_secs > rtc->range_min && secs >= rtc->start_secs) ||  in rtc_add_offset()
42 	    (rtc->start_secs < rtc->range_min &&  in rtc_add_offset()
43 	     secs <= (rtc->start_secs + rtc->range_max - rtc->range_min)))  in rtc_add_offset()
46 	rtc_time64_to_tm(secs + rtc->offset_secs, tm);  in rtc_add_offset()
49 static void rtc_subtract_offset(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_subtract_offset()  argument
53 	if (!rtc->offset_secs)  in rtc_subtract_offset()
64 	if (secs >= rtc->range_min && secs <= rtc->range_max)  in rtc_subtract_offset()
67 	rtc_time64_to_tm(secs - rtc->offset_secs, tm);  in rtc_subtract_offset()
70 static int rtc_valid_range(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_valid_range()  argument
72 	if (rtc->range_min != rtc->range_max) {  in rtc_valid_range()
74 		time64_t range_min = rtc->set_start_time ? rtc->start_secs :  in rtc_valid_range()
75 			rtc->range_min;  in rtc_valid_range()
76 		time64_t range_max = rtc->set_start_time ?  in rtc_valid_range()
77 			(rtc->start_secs + rtc->range_max - rtc->range_min) :  in rtc_valid_range()
78 			rtc->range_max;  in rtc_valid_range()
87 static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in __rtc_read_time()  argument
90 	if (!rtc->ops)  in __rtc_read_time()
92 	else if (!rtc->ops->read_time)  in __rtc_read_time()
96 		err = rtc->ops->read_time(rtc->dev.parent, tm);  in __rtc_read_time()
98 			dev_dbg(&rtc->dev, "read_time: fail to read: %d\n",  in __rtc_read_time()
103 		rtc_add_offset(rtc, tm);  in __rtc_read_time()
107 			dev_dbg(&rtc->dev, "read_time: rtc_time isn't valid\n");  in __rtc_read_time()
112 int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_read_time()  argument
116 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_time()
120 	err = __rtc_read_time(rtc, tm);  in rtc_read_time()
121 	mutex_unlock(&rtc->ops_lock);  in rtc_read_time()
128 int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)  in rtc_set_time()  argument
136 	err = rtc_valid_range(rtc, tm);  in rtc_set_time()
140 	rtc_subtract_offset(rtc, tm);  in rtc_set_time()
142 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_time()
146 	if (!rtc->ops)  in rtc_set_time()
148 	else if (rtc->ops->set_time)  in rtc_set_time()
149 		err = rtc->ops->set_time(rtc->dev.parent, tm);  in rtc_set_time()
150 	else if (rtc->ops->set_mmss64) {  in rtc_set_time()
153 		err = rtc->ops->set_mmss64(rtc->dev.parent, secs64);  in rtc_set_time()
154 	} else if (rtc->ops->set_mmss) {  in rtc_set_time()
156 		err = rtc->ops->set_mmss(rtc->dev.parent, secs64);  in rtc_set_time()
160 	pm_stay_awake(rtc->dev.parent);  in rtc_set_time()
161 	mutex_unlock(&rtc->ops_lock);  in rtc_set_time()
163 	schedule_work(&rtc->irqwork);  in rtc_set_time()
170 static int rtc_read_alarm_internal(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_read_alarm_internal()  argument
174 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm_internal()
178 	if (rtc->ops == NULL)  in rtc_read_alarm_internal()
180 	else if (!rtc->ops->read_alarm)  in rtc_read_alarm_internal()
194 		err = rtc->ops->read_alarm(rtc->dev.parent, alarm);  in rtc_read_alarm_internal()
197 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm_internal()
203 int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_read_alarm()  argument
254 	err = rtc_read_time(rtc, &before);  in __rtc_read_alarm()
263 		err = rtc_read_alarm_internal(rtc, alarm);  in __rtc_read_alarm()
269 			rtc_add_offset(rtc, &alarm->time);  in __rtc_read_alarm()
274 		err = rtc_read_time(rtc, &now);  in __rtc_read_alarm()
331 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "day");  in __rtc_read_alarm()
342 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month");  in __rtc_read_alarm()
357 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");  in __rtc_read_alarm()
365 		dev_warn(&rtc->dev, "alarm rollover not handled\n");  in __rtc_read_alarm()
372 		dev_warn(&rtc->dev, "invalid alarm value: %d-%d-%d %d:%d:%d\n",  in __rtc_read_alarm()
381 int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_read_alarm()  argument
385 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_read_alarm()
388 	if (rtc->ops == NULL)  in rtc_read_alarm()
390 	else if (!rtc->ops->read_alarm)  in rtc_read_alarm()
394 		alarm->enabled = rtc->aie_timer.enabled;  in rtc_read_alarm()
395 		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);  in rtc_read_alarm()
397 	mutex_unlock(&rtc->ops_lock);  in rtc_read_alarm()
404 static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in __rtc_set_alarm()  argument
417 	err = __rtc_read_time(rtc, &tm);  in __rtc_set_alarm()
430 	rtc_subtract_offset(rtc, &alarm->time);  in __rtc_set_alarm()
432 	if (!rtc->ops)  in __rtc_set_alarm()
434 	else if (!rtc->ops->set_alarm)  in __rtc_set_alarm()
437 		err = rtc->ops->set_alarm(rtc->dev.parent, alarm);  in __rtc_set_alarm()
443 int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_set_alarm()  argument
447 	if (!rtc->ops)  in rtc_set_alarm()
449 	else if (!rtc->ops->set_alarm)  in rtc_set_alarm()
456 	err = rtc_valid_range(rtc, &alarm->time);  in rtc_set_alarm()
460 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_set_alarm()
463 	if (rtc->aie_timer.enabled)  in rtc_set_alarm()
464 		rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_set_alarm()
466 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);  in rtc_set_alarm()
467 	rtc->aie_timer.period = 0;  in rtc_set_alarm()
469 		err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_set_alarm()
471 	mutex_unlock(&rtc->ops_lock);  in rtc_set_alarm()
478 int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)  in rtc_initialize_alarm()  argument
487 	err = rtc_read_time(rtc, &now);  in rtc_initialize_alarm()
491 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_initialize_alarm()
495 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);  in rtc_initialize_alarm()
496 	rtc->aie_timer.period = 0;  in rtc_initialize_alarm()
500 			 rtc->aie_timer.node.expires)) {  in rtc_initialize_alarm()
502 		rtc->aie_timer.enabled = 1;  in rtc_initialize_alarm()
503 		timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node);  in rtc_initialize_alarm()
504 		trace_rtc_timer_enqueue(&rtc->aie_timer);  in rtc_initialize_alarm()
506 	mutex_unlock(&rtc->ops_lock);  in rtc_initialize_alarm()
511 int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_alarm_irq_enable()  argument
513 	int err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_alarm_irq_enable()
517 	if (rtc->aie_timer.enabled != enabled) {  in rtc_alarm_irq_enable()
519 			err = rtc_timer_enqueue(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
521 			rtc_timer_remove(rtc, &rtc->aie_timer);  in rtc_alarm_irq_enable()
526 	else if (!rtc->ops)  in rtc_alarm_irq_enable()
528 	else if (!rtc->ops->alarm_irq_enable)  in rtc_alarm_irq_enable()
531 		err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled);  in rtc_alarm_irq_enable()
533 	mutex_unlock(&rtc->ops_lock);  in rtc_alarm_irq_enable()
540 int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)  in rtc_update_irq_enable()  argument
542 	int err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_update_irq_enable()
547 	if (enabled == 0 && rtc->uie_irq_active) {  in rtc_update_irq_enable()
548 		mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
549 		return rtc_dev_update_irq_enable_emul(rtc, 0);  in rtc_update_irq_enable()
553 	if (rtc->uie_rtctimer.enabled == enabled)  in rtc_update_irq_enable()
556 	if (rtc->uie_unsupported) {  in rtc_update_irq_enable()
565 		__rtc_read_time(rtc, &tm);  in rtc_update_irq_enable()
568 		rtc->uie_rtctimer.node.expires = ktime_add(now, onesec);  in rtc_update_irq_enable()
569 		rtc->uie_rtctimer.period = ktime_set(1, 0);  in rtc_update_irq_enable()
570 		err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
572 		rtc_timer_remove(rtc, &rtc->uie_rtctimer);  in rtc_update_irq_enable()
575 	mutex_unlock(&rtc->ops_lock);  in rtc_update_irq_enable()
584 		err = rtc_dev_update_irq_enable_emul(rtc, enabled);  in rtc_update_irq_enable()
601 void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)  in rtc_handle_legacy_irq()  argument
606 	spin_lock_irqsave(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
607 	rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode);  in rtc_handle_legacy_irq()
608 	spin_unlock_irqrestore(&rtc->irq_lock, flags);  in rtc_handle_legacy_irq()
610 	wake_up_interruptible(&rtc->irq_queue);  in rtc_handle_legacy_irq()
611 	kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);  in rtc_handle_legacy_irq()
623 	struct rtc_device *rtc = (struct rtc_device *)private;  in rtc_aie_update_irq()  local
624 	rtc_handle_legacy_irq(rtc, 1, RTC_AF);  in rtc_aie_update_irq()
636 	struct rtc_device *rtc = (struct rtc_device *)private;  in rtc_uie_update_irq()  local
637 	rtc_handle_legacy_irq(rtc, 1,  RTC_UF);  in rtc_uie_update_irq()
651 	struct rtc_device *rtc;  in rtc_pie_update_irq()  local
654 	rtc = container_of(timer, struct rtc_device, pie_timer);  in rtc_pie_update_irq()
656 	period = NSEC_PER_SEC / rtc->irq_freq;  in rtc_pie_update_irq()
659 	rtc_handle_legacy_irq(rtc, count, RTC_PF);  in rtc_pie_update_irq()
671 void rtc_update_irq(struct rtc_device *rtc,  in rtc_update_irq()  argument
674 	if (IS_ERR_OR_NULL(rtc))  in rtc_update_irq()
677 	pm_stay_awake(rtc->dev.parent);  in rtc_update_irq()
678 	schedule_work(&rtc->irqwork);  in rtc_update_irq()
694 	struct rtc_device *rtc = NULL;  in rtc_class_open()  local
698 		rtc = to_rtc_device(dev);  in rtc_class_open()
700 	if (rtc) {  in rtc_class_open()
701 		if (!try_module_get(rtc->owner)) {  in rtc_class_open()
703 			rtc = NULL;  in rtc_class_open()
707 	return rtc;  in rtc_class_open()
711 void rtc_class_close(struct rtc_device *rtc)  in rtc_class_close()  argument
713 	module_put(rtc->owner);  in rtc_class_close()
714 	put_device(&rtc->dev);  in rtc_class_close()
718 static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)  in rtc_update_hrtimer()  argument
730 	if (hrtimer_try_to_cancel(&rtc->pie_timer) < 0)  in rtc_update_hrtimer()
734 		ktime_t period = NSEC_PER_SEC / rtc->irq_freq;  in rtc_update_hrtimer()
736 		hrtimer_start(&rtc->pie_timer, period, HRTIMER_MODE_REL);  in rtc_update_hrtimer()
751 int rtc_irq_set_state(struct rtc_device *rtc, int enabled)  in rtc_irq_set_state()  argument
755 	while (rtc_update_hrtimer(rtc, enabled) < 0)  in rtc_irq_set_state()
758 	rtc->pie_enabled = enabled;  in rtc_irq_set_state()
774 int rtc_irq_set_freq(struct rtc_device *rtc, int freq)  in rtc_irq_set_freq()  argument
781 	rtc->irq_freq = freq;  in rtc_irq_set_freq()
782 	while (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0)  in rtc_irq_set_freq()
801 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_enqueue()  argument
803 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_enqueue()
808 	__rtc_read_time(rtc, &tm);  in rtc_timer_enqueue()
818 	timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
825 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_enqueue()
827 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_enqueue()
828 			schedule_work(&rtc->irqwork);  in rtc_timer_enqueue()
830 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_enqueue()
839 static void rtc_alarm_disable(struct rtc_device *rtc)  in rtc_alarm_disable()  argument
841 	if (!rtc->ops || !rtc->ops->alarm_irq_enable)  in rtc_alarm_disable()
844 	rtc->ops->alarm_irq_enable(rtc->dev.parent, false);  in rtc_alarm_disable()
860 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_remove()  argument
862 	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
863 	timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_remove()
869 		next = timerqueue_getnext(&rtc->timerqueue);  in rtc_timer_remove()
871 			rtc_alarm_disable(rtc);  in rtc_timer_remove()
876 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_remove()
878 			pm_stay_awake(rtc->dev.parent);  in rtc_timer_remove()
879 			schedule_work(&rtc->irqwork);  in rtc_timer_remove()
901 	struct rtc_device *rtc =  in rtc_timer_do_work()  local
904 	mutex_lock(&rtc->ops_lock);  in rtc_timer_do_work()
906 	__rtc_read_time(rtc, &tm);  in rtc_timer_do_work()
908 	while ((next = timerqueue_getnext(&rtc->timerqueue))) {  in rtc_timer_do_work()
914 		timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
926 			timerqueue_add(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
940 		err = __rtc_set_alarm(rtc, &alarm);  in rtc_timer_do_work()
948 			timerqueue_del(&rtc->timerqueue, &timer->node);  in rtc_timer_do_work()
951 			dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);  in rtc_timer_do_work()
955 		rtc_alarm_disable(rtc);  in rtc_timer_do_work()
957 	pm_relax(rtc->dev.parent);  in rtc_timer_do_work()
958 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_do_work()
985 int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,  in rtc_timer_start()  argument
989 	mutex_lock(&rtc->ops_lock);  in rtc_timer_start()
991 		rtc_timer_remove(rtc, timer);  in rtc_timer_start()
996 	ret = rtc_timer_enqueue(rtc, timer);  in rtc_timer_start()
998 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_start()
1008 void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer)  in rtc_timer_cancel()  argument
1010 	mutex_lock(&rtc->ops_lock);  in rtc_timer_cancel()
1012 		rtc_timer_remove(rtc, timer);  in rtc_timer_cancel()
1013 	mutex_unlock(&rtc->ops_lock);  in rtc_timer_cancel()
1027 int rtc_read_offset(struct rtc_device *rtc, long *offset)  in rtc_read_offset()  argument
1031 	if (!rtc->ops)  in rtc_read_offset()
1034 	if (!rtc->ops->read_offset)  in rtc_read_offset()
1037 	mutex_lock(&rtc->ops_lock);  in rtc_read_offset()
1038 	ret = rtc->ops->read_offset(rtc->dev.parent, offset);  in rtc_read_offset()
1039 	mutex_unlock(&rtc->ops_lock);  in rtc_read_offset()
1062 int rtc_set_offset(struct rtc_device *rtc, long offset)  in rtc_set_offset()  argument
1066 	if (!rtc->ops)  in rtc_set_offset()
1069 	if (!rtc->ops->set_offset)  in rtc_set_offset()
1072 	mutex_lock(&rtc->ops_lock);  in rtc_set_offset()
1073 	ret = rtc->ops->set_offset(rtc->dev.parent, offset);  in rtc_set_offset()
1074 	mutex_unlock(&rtc->ops_lock);  in rtc_set_offset()