2  * rtc-mrst.c: Driver for Moorestown virtual RTC
19  * This driver is based upon drivers/rtc/rtc-cmos.c
27  *  * Alarm function is also limited to hr/min/sec.
41 #include <asm/intel-mid.h>
78  * driver chose to use 1972 (1970 is UNIX time start point) as the base,
79  * and does the translation at read/write time.
82  * make it consistent in leap year setting for both vrtc and low-level
85  * year will be parsed as 1960 which is not a valid UNIX time and will
88 static int mrst_read_time(struct device *dev, struct rtc_time *time)  in mrst_read_time()  argument
96 	time->tm_sec = vrtc_cmos_read(RTC_SECONDS);  in mrst_read_time()
97 	time->tm_min = vrtc_cmos_read(RTC_MINUTES);  in mrst_read_time()
98 	time->tm_hour = vrtc_cmos_read(RTC_HOURS);  in mrst_read_time()
99 	time->tm_mday = vrtc_cmos_read(RTC_DAY_OF_MONTH);  in mrst_read_time()
100 	time->tm_mon = vrtc_cmos_read(RTC_MONTH);  in mrst_read_time()
101 	time->tm_year = vrtc_cmos_read(RTC_YEAR);  in mrst_read_time()
105 	time->tm_year += 72;  in mrst_read_time()
106 	time->tm_mon--;  in mrst_read_time()
110 static int mrst_set_time(struct device *dev, struct rtc_time *time)  in mrst_set_time()  argument
114 	unsigned char mon, day, hrs, min, sec;  in mrst_set_time()  local
117 	yrs = time->tm_year;  in mrst_set_time()
118 	mon = time->tm_mon + 1;   /* tm_mon starts at zero */  in mrst_set_time()
119 	day = time->tm_mday;  in mrst_set_time()
120 	hrs = time->tm_hour;  in mrst_set_time()
121 	min = time->tm_min;  in mrst_set_time()
122 	sec = time->tm_sec;  in mrst_set_time()
125 		return -EINVAL;  in mrst_set_time()
126 	yrs -= 72;  in mrst_set_time()
135 	vrtc_cmos_write(sec, RTC_SECONDS);  in mrst_set_time()
148 	if (mrst->irq <= 0)  in mrst_read_alarm()
149 		return -EIO;  in mrst_read_alarm()
153 	t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM);  in mrst_read_alarm()
154 	t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM);  in mrst_read_alarm()
155 	t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM);  in mrst_read_alarm()
160 	t->enabled = !!(rtc_control & RTC_AIE);  in mrst_read_alarm()
161 	t->pending = 0;  in mrst_read_alarm()
177 		rtc_update_irq(mrst->rtc, 1, rtc_intr);  in mrst_checkintr()
210 	unsigned char hrs, min, sec;  in mrst_set_alarm()  local
213 	if (!mrst->irq)  in mrst_set_alarm()
214 		return -EIO;  in mrst_set_alarm()
216 	hrs = t->time.tm_hour;  in mrst_set_alarm()
217 	min = t->time.tm_min;  in mrst_set_alarm()
218 	sec = t->time.tm_sec;  in mrst_set_alarm()
227 	vrtc_cmos_write(sec, RTC_SECONDS_ALARM);  in mrst_set_alarm()
236 	if (t->enabled)  in mrst_set_alarm()
244 /* Currently, the vRTC doesn't support UIE ON/OFF */
276 		   (rtc_control & RTC_PIE) ? "on" : "off",  in mrst_procfs()
277 		   (rtc_control & RTC_AIE) ? "on" : "off");  in mrst_procfs()
326 		return -EBUSY;  in vrtc_mrst_do_probe()
329 		return -ENODEV;  in vrtc_mrst_do_probe()
331 	iomem = devm_request_mem_region(dev, iomem->start, resource_size(iomem),  in vrtc_mrst_do_probe()
335 		return -EBUSY;  in vrtc_mrst_do_probe()
346 	mrst_rtc.rtc->ops = &mrst_rtc_ops;  in vrtc_mrst_do_probe()
348 	rename_region(iomem, dev_name(&mrst_rtc.rtc->dev));  in vrtc_mrst_do_probe()
356 		dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n");  in vrtc_mrst_do_probe()
360 					  0, dev_name(&mrst_rtc.rtc->dev),  in vrtc_mrst_do_probe()
378 	dev_err(dev, "rtc-mrst: unable to initialise\n");  in vrtc_mrst_do_probe()
395 	mrst->rtc = NULL;  in rtc_mrst_do_remove()
396 	mrst->dev = NULL;  in rtc_mrst_do_remove()
407 	mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL);  in mrst_suspend()
423 		mrst->enabled_wake = 1;  in mrst_suspend()
424 		enable_irq_wake(mrst->irq);  in mrst_suspend()
427 	dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n",  in mrst_suspend()
435  * We want RTC alarms to wake us from the deep power saving state
445 	unsigned char tmp = mrst->suspend_ctrl;  in mrst_resume()
447 	/* Re-enable any irqs previously active */  in mrst_resume()
451 		if (mrst->enabled_wake) {  in mrst_resume()
452 			disable_irq_wake(mrst->irq);  in mrst_resume()
453 			mrst->enabled_wake = 0;  in mrst_resume()
465 			rtc_update_irq(mrst->rtc, 1, mask);  in mrst_resume()
471 	dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp);  in mrst_resume()
484 	return -ENOSYS;  in mrst_poweroff()
491 	return vrtc_mrst_do_probe(&pdev->dev,  in vrtc_mrst_platform_probe()
498 	rtc_mrst_do_remove(&pdev->dev);  in vrtc_mrst_platform_remove()
504 	if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev))  in vrtc_mrst_platform_shutdown()