3  * RTC class driver for "CMOS RTC":  PCs, ACPI, etc
10  * The original "cmos clock" chip was an MC146818 chip, now obsolete.
247 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_read_alarm()  local
251 	if (!is_valid_irq(cmos->irq))  in cmos_read_alarm()
264 	if (cmos->day_alrm) {  in cmos_read_alarm()
266 		t->time.tm_mday = CMOS_READ(cmos->day_alrm) & 0x3f;  in cmos_read_alarm()
270 		if (cmos->mon_alrm) {  in cmos_read_alarm()
271 			t->time.tm_mon = CMOS_READ(cmos->mon_alrm);  in cmos_read_alarm()
294 		if (cmos->day_alrm) {  in cmos_read_alarm()
300 			if (cmos->mon_alrm) {  in cmos_read_alarm()
315 static void cmos_checkintr(struct cmos_rtc *cmos, unsigned char rtc_control)  in cmos_checkintr()  argument
329 		rtc_update_irq(cmos->rtc, 1, rtc_intr);  in cmos_checkintr()
332 static void cmos_irq_enable(struct cmos_rtc *cmos, unsigned char mask)  in cmos_irq_enable()  argument
340 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_enable()
348 		if (cmos->wake_on)  in cmos_irq_enable()
349 			cmos->wake_on(cmos->dev);  in cmos_irq_enable()
352 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_enable()
355 static void cmos_irq_disable(struct cmos_rtc *cmos, unsigned char mask)  in cmos_irq_disable()  argument
366 		if (cmos->wake_off)  in cmos_irq_disable()
367 			cmos->wake_off(cmos->dev);  in cmos_irq_disable()
370 	cmos_checkintr(cmos, rtc_control);  in cmos_irq_disable()
375 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_validate_alarm()  local
380 	if (!cmos->day_alrm) {  in cmos_validate_alarm()
392 	} else if (!cmos->mon_alrm) {  in cmos_validate_alarm()
442 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_set_alarm()  local
447 	if (!is_valid_irq(cmos->irq))  in cmos_set_alarm()
473 	cmos_irq_disable(cmos, RTC_AIE);  in cmos_set_alarm()
481 	if (cmos->day_alrm) {  in cmos_set_alarm()
482 		CMOS_WRITE(mday, cmos->day_alrm);  in cmos_set_alarm()
483 		if (cmos->mon_alrm)  in cmos_set_alarm()
484 			CMOS_WRITE(mon, cmos->mon_alrm);  in cmos_set_alarm()
497 		cmos_irq_enable(cmos, RTC_AIE);  in cmos_set_alarm()
501 	cmos->alarm_expires = rtc_tm_to_time64(&t->time);  in cmos_set_alarm()
508 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_alarm_irq_enable()  local
514 		cmos_irq_enable(cmos, RTC_AIE);  in cmos_alarm_irq_enable()
516 		cmos_irq_disable(cmos, RTC_AIE);  in cmos_alarm_irq_enable()
526 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_procfs()  local
552 		   cmos->rtc->irq_freq,  in cmos_procfs()
605 	struct cmos_rtc	*cmos = priv;  in cmos_nvram_write()  local
618 		if (off == cmos->day_alrm  in cmos_nvram_write()
619 				|| off == cmos->mon_alrm  in cmos_nvram_write()
620 				|| off == cmos->century)  in cmos_nvram_write()
804 		/* force periodic irq to CMOS reset default of 1024Hz;  in cmos_do_probe()
906 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_do_remove()  local
909 	cmos_do_shutdown(cmos->irq);  in cmos_do_remove()
911 	if (is_valid_irq(cmos->irq)) {  in cmos_do_remove()
912 		free_irq(cmos->irq, cmos->rtc);  in cmos_do_remove()
917 	cmos->rtc = NULL;  in cmos_do_remove()
919 	ports = cmos->iomem;  in cmos_do_remove()
924 	cmos->iomem = NULL;  in cmos_do_remove()
926 	cmos->dev = NULL;  in cmos_do_remove()
931 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_aie_poweroff()  local
937 	if (!cmos->alarm_expires)  in cmos_aie_poweroff()
960 	if (cmos->alarm_expires == t_now + 1) {  in cmos_aie_poweroff()
967 	} else if (cmos->alarm_expires > t_now + 1) {  in cmos_aie_poweroff()
976 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_suspend()  local
981 	cmos->suspend_ctrl = tmp = CMOS_READ(RTC_CONTROL);  in cmos_suspend()
993 		cmos_checkintr(cmos, tmp);  in cmos_suspend()
998 		cmos->enabled_wake = 1;  in cmos_suspend()
999 		if (cmos->wake_on)  in cmos_suspend()
1000 			cmos->wake_on(dev);  in cmos_suspend()
1002 			enable_irq_wake(cmos->irq);  in cmos_suspend()
1005 	memset(&cmos->saved_wkalrm, 0, sizeof(struct rtc_wkalrm));  in cmos_suspend()
1006 	cmos_read_alarm(dev, &cmos->saved_wkalrm);  in cmos_suspend()
1031 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_check_wkalrm()  local
1039 	if (!(cmos->suspend_ctrl & RTC_AIE))  in cmos_check_wkalrm()
1049 	if (t_now >= cmos->alarm_expires && cmos_use_acpi_alarm()) {  in cmos_check_wkalrm()
1051 		cmos_interrupt(0, (void *)cmos->rtc);  in cmos_check_wkalrm()
1059 	t_saved_expires = rtc_tm_to_time64(&cmos->saved_wkalrm.time);  in cmos_check_wkalrm()
1061 	    cmos->saved_wkalrm.enabled != current_alarm.enabled) {  in cmos_check_wkalrm()
1062 		cmos_set_alarm(dev, &cmos->saved_wkalrm);  in cmos_check_wkalrm()
1071 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_resume()  local
1074 	if (cmos->enabled_wake && !cmos_use_acpi_alarm()) {  in cmos_resume()
1075 		if (cmos->wake_off)  in cmos_resume()
1076 			cmos->wake_off(dev);  in cmos_resume()
1078 			disable_irq_wake(cmos->irq);  in cmos_resume()
1079 		cmos->enabled_wake = 0;  in cmos_resume()
1086 	tmp = cmos->suspend_ctrl;  in cmos_resume()
1087 	cmos->suspend_ctrl = 0;  in cmos_resume()
1108 			rtc_update_irq(cmos->rtc, 1, mask);  in cmos_resume()
1127 /* On non-x86 systems, a "CMOS" RTC lives most naturally on platform_bus.
1142 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in rtc_handler()  local
1154 		cmos_interrupt(0, (void *)cmos->rtc);  in rtc_handler()
1164 			rtc_update_irq(cmos->rtc, 1, rtc_intr);  in rtc_handler()
1219 /* Every ACPI platform has a mc146818 compatible "cmos rtc".  Here we find
1261 	struct cmos_rtc *cmos = dev_get_drvdata(dev);  in cmos_check_acpi_rtc_status()  local
1276 		rtc_update_irq(cmos->rtc, 1, mask);  in cmos_check_acpi_rtc_status()
1328 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_pnp_shutdown()  local
1337 	cmos_do_shutdown(cmos->irq);  in cmos_pnp_shutdown()
1426 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);  in cmos_platform_shutdown()  local
1435 	cmos_do_shutdown(cmos->irq);  in cmos_platform_shutdown()
1497 MODULE_DESCRIPTION("Driver for PC-style 'CMOS' RTCs");