3  * RTC class driver for "CMOS RTC":  PCs, ACPI, etc
10  * The original "cmos clock" chip was an MC146818 chip, now obsolete.
253 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_read_alarm()  local
257 	if (!is_valid_irq(cmos->irq))  in cmos_read_alarm()
270 	if (cmos->day_alrm) {  in cmos_read_alarm()
272 		t->time.tm_mday = CMOS_READ(cmos->day_alrm) & 0x3f;  in cmos_read_alarm()
276 		if (cmos->mon_alrm) {  in cmos_read_alarm()
277 			t->time.tm_mon = CMOS_READ(cmos->mon_alrm);  in cmos_read_alarm()
300 		if (cmos->day_alrm) {  in cmos_read_alarm()
306 			if (cmos->mon_alrm) {  in cmos_read_alarm()
321 static void cmos_checkintr(struct cmos_rtc *cmos, unsigned char rtc_control)  in cmos_checkintr()  argument
335 		rtc_update_irq(cmos->rtc, 1, rtc_intr);  in cmos_checkintr()
338 static void cmos_irq_enable(struct cmos_rtc *cmos, unsigned char mask)  in cmos_irq_enable()  argument
346 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_enable()
354 		if (cmos->wake_on)  in cmos_irq_enable()
355 			cmos->wake_on(cmos->dev);  in cmos_irq_enable()
358 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_enable()
361 static void cmos_irq_disable(struct cmos_rtc *cmos, unsigned char mask)  in cmos_irq_disable()  argument
372 		if (cmos->wake_off)  in cmos_irq_disable()
373 			cmos->wake_off(cmos->dev);  in cmos_irq_disable()
376 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_disable()
381 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_validate_alarm()  local
386 	if (!cmos->day_alrm) {  in cmos_validate_alarm()
398 	} else if (!cmos->mon_alrm) {  in cmos_validate_alarm()
448 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_set_alarm()  local
453 	if (!is_valid_irq(cmos->irq))  in cmos_set_alarm()
479 	cmos_irq_disable(cmos, RTC_AIE);  in cmos_set_alarm()
487 	if (cmos->day_alrm) {  in cmos_set_alarm()
488 		CMOS_WRITE(mday, cmos->day_alrm);  in cmos_set_alarm()
489 		if (cmos->mon_alrm)  in cmos_set_alarm()
490 			CMOS_WRITE(mon, cmos->mon_alrm);  in cmos_set_alarm()
503 		cmos_irq_enable(cmos, RTC_AIE);  in cmos_set_alarm()
507 	cmos->alarm_expires = rtc_tm_to_time64(&t->time);  in cmos_set_alarm()
514 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_alarm_irq_enable()  local
520 		cmos_irq_enable(cmos, RTC_AIE);  in cmos_alarm_irq_enable()
522 		cmos_irq_disable(cmos, RTC_AIE);  in cmos_alarm_irq_enable()
532 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_procfs()  local
558 		   cmos->rtc->irq_freq,  in cmos_procfs()
617 	struct cmos_rtc	*cmos = priv;  in cmos_nvram_write()  local
630 		if (off == cmos->day_alrm  in cmos_nvram_write()
631 				|| off == cmos->mon_alrm  in cmos_nvram_write()
632 				|| off == cmos->century)  in cmos_nvram_write()
809 		/* force periodic irq to CMOS reset default of 1024Hz;  in cmos_do_probe()
910 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_do_remove()  local
913 	cmos_do_shutdown(cmos->irq);  in cmos_do_remove()
915 	if (is_valid_irq(cmos->irq)) {  in cmos_do_remove()
916 		free_irq(cmos->irq, cmos->rtc);  in cmos_do_remove()
921 	cmos->rtc = NULL;  in cmos_do_remove()
923 	ports = cmos->iomem;  in cmos_do_remove()
928 	cmos->iomem = NULL;  in cmos_do_remove()
930 	cmos->dev = NULL;  in cmos_do_remove()
935 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_aie_poweroff()  local
941 	if (!cmos->alarm_expires)  in cmos_aie_poweroff()
964 	if (cmos->alarm_expires == t_now + 1) {  in cmos_aie_poweroff()
971 	} else if (cmos->alarm_expires > t_now + 1) {  in cmos_aie_poweroff()
980 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_suspend()  local
985 	cmos->suspend_ctrl = tmp = CMOS_READ(RTC_CONTROL);  in cmos_suspend()
997 		cmos_checkintr(cmos, tmp);  in cmos_suspend()
1002 		cmos->enabled_wake = 1;  in cmos_suspend()
1003 		if (cmos->wake_on)  in cmos_suspend()
1004 			cmos->wake_on(dev);  in cmos_suspend()
1006 			enable_irq_wake(cmos->irq);  in cmos_suspend()
1009 	memset(&cmos->saved_wkalrm, 0, sizeof(struct rtc_wkalrm));  in cmos_suspend()
1010 	cmos_read_alarm(dev, &cmos->saved_wkalrm);  in cmos_suspend()
1035 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_check_wkalrm()  local
1043 	if (!(cmos->suspend_ctrl & RTC_AIE))  in cmos_check_wkalrm()
1053 	if (t_now >= cmos->alarm_expires && cmos_use_acpi_alarm()) {  in cmos_check_wkalrm()
1054 		cmos_interrupt(0, (void *)cmos->rtc);  in cmos_check_wkalrm()
1061 	t_saved_expires = rtc_tm_to_time64(&cmos->saved_wkalrm.time);  in cmos_check_wkalrm()
1063 	    cmos->saved_wkalrm.enabled != current_alarm.enabled) {  in cmos_check_wkalrm()
1064 		cmos_set_alarm(dev, &cmos->saved_wkalrm);  in cmos_check_wkalrm()
1073 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_resume()  local
1076 	if (cmos->enabled_wake && !cmos_use_acpi_alarm()) {  in cmos_resume()
1077 		if (cmos->wake_off)  in cmos_resume()
1078 			cmos->wake_off(dev);  in cmos_resume()
1080 			disable_irq_wake(cmos->irq);  in cmos_resume()
1081 		cmos->enabled_wake = 0;  in cmos_resume()
1088 	tmp = cmos->suspend_ctrl;  in cmos_resume()
1089 	cmos->suspend_ctrl = 0;  in cmos_resume()
1110 			rtc_update_irq(cmos->rtc, 1, mask);  in cmos_resume()
1129 /* On non-x86 systems, a "CMOS" RTC lives most naturally on platform_bus.
1144 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in rtc_handler()  local
1156 		cmos_interrupt(0, (void *)cmos->rtc);  in rtc_handler()
1166 			rtc_update_irq(cmos->rtc, 1, rtc_intr);  in rtc_handler()
1221 /* Every ACPI platform has a mc146818 compatible "cmos rtc".  Here we find
1263 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_check_acpi_rtc_status()  local
1278 		rtc_update_irq(cmos->rtc, 1, mask);  in cmos_check_acpi_rtc_status()
1330 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_pnp_shutdown()  local
1339 	cmos_do_shutdown(cmos->irq);  in cmos_pnp_shutdown()
1428 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_platform_shutdown()  local
1437 	cmos_do_shutdown(cmos->irq);  in cmos_platform_shutdown()
1499 MODULE_DESCRIPTION("Driver for PC-style 'CMOS' RTCs");