Lines Matching +full:s3c6410 +full:- +full:rtc
1 /* drivers/rtc/rtc-s3c.c
14 * S3C2410/S3C2440/S3C24XX Internal RTC Driver
23 #include <linux/rtc.h>
33 #include "rtc-s3c.h"
37 struct rtc_device *rtc; member
76 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); in s3c_rtc_enable_clk()
78 if (info->clk_disabled) { in s3c_rtc_enable_clk()
79 ret = clk_enable(info->rtc_clk); in s3c_rtc_enable_clk()
83 if (info->data->needs_src_clk) { in s3c_rtc_enable_clk()
84 ret = clk_enable(info->rtc_src_clk); in s3c_rtc_enable_clk()
86 clk_disable(info->rtc_clk); in s3c_rtc_enable_clk()
90 info->clk_disabled = false; in s3c_rtc_enable_clk()
94 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); in s3c_rtc_enable_clk()
103 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); in s3c_rtc_disable_clk()
104 if (!info->clk_disabled) { in s3c_rtc_disable_clk()
105 if (info->data->needs_src_clk) in s3c_rtc_disable_clk()
106 clk_disable(info->rtc_src_clk); in s3c_rtc_disable_clk()
107 clk_disable(info->rtc_clk); in s3c_rtc_disable_clk()
108 info->clk_disabled = true; in s3c_rtc_disable_clk()
110 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); in s3c_rtc_disable_clk()
118 if (info->data->irq_handler) in s3c_rtc_tickirq()
119 info->data->irq_handler(info, S3C2410_INTP_TIC); in s3c_rtc_tickirq()
128 if (info->data->irq_handler) in s3c_rtc_alarmirq()
129 info->data->irq_handler(info, S3C2410_INTP_ALM); in s3c_rtc_alarmirq()
141 dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled); in s3c_rtc_setaie()
147 tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; in s3c_rtc_setaie()
152 writeb(tmp, info->base + S3C2410_RTCALM); in s3c_rtc_setaie()
167 /* Set RTC frequency */
173 return -EINVAL; in s3c_rtc_setfreq()
178 spin_lock_irq(&info->pie_lock); in s3c_rtc_setfreq()
180 if (info->data->set_freq) in s3c_rtc_setfreq()
181 info->data->set_freq(info, freq); in s3c_rtc_setfreq()
183 spin_unlock_irq(&info->pie_lock); in s3c_rtc_setfreq()
201 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN); in s3c_rtc_gettime()
202 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR); in s3c_rtc_gettime()
203 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE); in s3c_rtc_gettime()
204 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON); in s3c_rtc_gettime()
205 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR); in s3c_rtc_gettime()
206 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC); in s3c_rtc_gettime()
208 /* the only way to work out whether the system was mid-update in s3c_rtc_gettime()
210 * is zero, then we re-try the entire read in s3c_rtc_gettime()
213 if (rtc_tm->tm_sec == 0 && !have_retried) { in s3c_rtc_gettime()
218 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); in s3c_rtc_gettime()
219 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); in s3c_rtc_gettime()
220 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); in s3c_rtc_gettime()
221 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday); in s3c_rtc_gettime()
222 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon); in s3c_rtc_gettime()
223 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); in s3c_rtc_gettime()
227 rtc_tm->tm_year += 100; in s3c_rtc_gettime()
230 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, in s3c_rtc_gettime()
231 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); in s3c_rtc_gettime()
233 rtc_tm->tm_mon -= 1; in s3c_rtc_gettime()
241 int year = tm->tm_year - 100; in s3c_rtc_settime()
245 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, in s3c_rtc_settime()
246 tm->tm_hour, tm->tm_min, tm->tm_sec); in s3c_rtc_settime()
251 dev_err(dev, "rtc only supports 100 years\n"); in s3c_rtc_settime()
252 return -EINVAL; in s3c_rtc_settime()
259 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC); in s3c_rtc_settime()
260 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN); in s3c_rtc_settime()
261 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR); in s3c_rtc_settime()
262 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE); in s3c_rtc_settime()
263 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON); in s3c_rtc_settime()
264 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR); in s3c_rtc_settime()
274 struct rtc_time *alm_tm = &alrm->time; in s3c_rtc_getalarm()
282 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC); in s3c_rtc_getalarm()
283 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN); in s3c_rtc_getalarm()
284 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR); in s3c_rtc_getalarm()
285 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON); in s3c_rtc_getalarm()
286 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE); in s3c_rtc_getalarm()
287 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR); in s3c_rtc_getalarm()
289 alm_en = readb(info->base + S3C2410_RTCALM); in s3c_rtc_getalarm()
293 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; in s3c_rtc_getalarm()
297 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday, in s3c_rtc_getalarm()
298 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec); in s3c_rtc_getalarm()
302 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec); in s3c_rtc_getalarm()
305 alm_tm->tm_min = bcd2bin(alm_tm->tm_min); in s3c_rtc_getalarm()
308 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour); in s3c_rtc_getalarm()
311 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday); in s3c_rtc_getalarm()
314 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon); in s3c_rtc_getalarm()
315 alm_tm->tm_mon -= 1; in s3c_rtc_getalarm()
319 alm_tm->tm_year = bcd2bin(alm_tm->tm_year); in s3c_rtc_getalarm()
327 struct rtc_time *tm = &alrm->time; in s3c_rtc_setalarm()
332 alrm->enabled, in s3c_rtc_setalarm()
333 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, in s3c_rtc_setalarm()
334 tm->tm_hour, tm->tm_min, tm->tm_sec); in s3c_rtc_setalarm()
340 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; in s3c_rtc_setalarm()
341 writeb(0x00, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
343 if (tm->tm_sec < 60 && tm->tm_sec >= 0) { in s3c_rtc_setalarm()
345 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC); in s3c_rtc_setalarm()
348 if (tm->tm_min < 60 && tm->tm_min >= 0) { in s3c_rtc_setalarm()
350 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN); in s3c_rtc_setalarm()
353 if (tm->tm_hour < 24 && tm->tm_hour >= 0) { in s3c_rtc_setalarm()
355 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR); in s3c_rtc_setalarm()
358 if (tm->tm_mon < 12 && tm->tm_mon >= 0) { in s3c_rtc_setalarm()
360 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON); in s3c_rtc_setalarm()
363 if (tm->tm_mday <= 31 && tm->tm_mday >= 1) { in s3c_rtc_setalarm()
365 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE); in s3c_rtc_setalarm()
370 writeb(alrm_en, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
374 s3c_rtc_setaie(dev, alrm->enabled); in s3c_rtc_setalarm()
388 if (info->data->enable_tick) in s3c_rtc_proc()
389 info->data->enable_tick(info, seq); in s3c_rtc_proc()
409 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
410 /* re-enable the device, and check it is ok */ in s3c24xx_rtc_enable()
412 dev_info(info->dev, "rtc disabled, re-enabling\n"); in s3c24xx_rtc_enable()
414 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
415 writew(tmp | S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
419 dev_info(info->dev, "removing RTCCON_CNTSEL\n"); in s3c24xx_rtc_enable()
421 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
423 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
427 dev_info(info->dev, "removing RTCCON_CLKRST\n"); in s3c24xx_rtc_enable()
429 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
431 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
439 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
441 writew(con, info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
443 con = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
445 writeb(con, info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
452 con = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
455 writew(con, info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
462 s3c_rtc_setaie(info->dev, 0); in s3c_rtc_remove()
464 if (info->data->needs_src_clk) in s3c_rtc_remove()
465 clk_unprepare(info->rtc_src_clk); in s3c_rtc_remove()
466 clk_unprepare(info->rtc_clk); in s3c_rtc_remove()
477 match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node); in s3c_rtc_get_data()
478 return match->data; in s3c_rtc_get_data()
488 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); in s3c_rtc_probe()
490 return -ENOMEM; in s3c_rtc_probe()
493 info->irq_tick = platform_get_irq(pdev, 1); in s3c_rtc_probe()
494 if (info->irq_tick < 0) { in s3c_rtc_probe()
495 dev_err(&pdev->dev, "no irq for rtc tick\n"); in s3c_rtc_probe()
496 return info->irq_tick; in s3c_rtc_probe()
499 info->dev = &pdev->dev; in s3c_rtc_probe()
500 info->data = s3c_rtc_get_data(pdev); in s3c_rtc_probe()
501 if (!info->data) { in s3c_rtc_probe()
502 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n"); in s3c_rtc_probe()
503 return -EINVAL; in s3c_rtc_probe()
505 spin_lock_init(&info->pie_lock); in s3c_rtc_probe()
506 spin_lock_init(&info->alarm_clk_lock); in s3c_rtc_probe()
510 info->irq_alarm = platform_get_irq(pdev, 0); in s3c_rtc_probe()
511 if (info->irq_alarm < 0) { in s3c_rtc_probe()
512 dev_err(&pdev->dev, "no irq for alarm\n"); in s3c_rtc_probe()
513 return info->irq_alarm; in s3c_rtc_probe()
516 dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n", in s3c_rtc_probe()
517 info->irq_tick, info->irq_alarm); in s3c_rtc_probe()
521 info->base = devm_ioremap_resource(&pdev->dev, res); in s3c_rtc_probe()
522 if (IS_ERR(info->base)) in s3c_rtc_probe()
523 return PTR_ERR(info->base); in s3c_rtc_probe()
525 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); in s3c_rtc_probe()
526 if (IS_ERR(info->rtc_clk)) { in s3c_rtc_probe()
527 ret = PTR_ERR(info->rtc_clk); in s3c_rtc_probe()
528 if (ret != -EPROBE_DEFER) in s3c_rtc_probe()
529 dev_err(&pdev->dev, "failed to find rtc clock\n"); in s3c_rtc_probe()
531 dev_dbg(&pdev->dev, "probe deferred due to missing rtc clk\n"); in s3c_rtc_probe()
534 ret = clk_prepare_enable(info->rtc_clk); in s3c_rtc_probe()
538 if (info->data->needs_src_clk) { in s3c_rtc_probe()
539 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src"); in s3c_rtc_probe()
540 if (IS_ERR(info->rtc_src_clk)) { in s3c_rtc_probe()
541 ret = PTR_ERR(info->rtc_src_clk); in s3c_rtc_probe()
542 if (ret != -EPROBE_DEFER) in s3c_rtc_probe()
543 dev_err(&pdev->dev, in s3c_rtc_probe()
544 "failed to find rtc source clock\n"); in s3c_rtc_probe()
546 dev_dbg(&pdev->dev, in s3c_rtc_probe()
547 "probe deferred due to missing rtc src clk\n"); in s3c_rtc_probe()
550 ret = clk_prepare_enable(info->rtc_src_clk); in s3c_rtc_probe()
556 if (info->data->enable) in s3c_rtc_probe()
557 info->data->enable(info); in s3c_rtc_probe()
559 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", in s3c_rtc_probe()
560 readw(info->base + S3C2410_RTCCON)); in s3c_rtc_probe()
562 device_init_wakeup(&pdev->dev, 1); in s3c_rtc_probe()
564 /* Check RTC Time */ in s3c_rtc_probe()
565 if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) { in s3c_rtc_probe()
573 s3c_rtc_settime(&pdev->dev, &rtc_tm); in s3c_rtc_probe()
575 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); in s3c_rtc_probe()
578 /* register RTC and exit */ in s3c_rtc_probe()
579 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, in s3c_rtc_probe()
581 if (IS_ERR(info->rtc)) { in s3c_rtc_probe()
582 dev_err(&pdev->dev, "cannot attach rtc\n"); in s3c_rtc_probe()
583 ret = PTR_ERR(info->rtc); in s3c_rtc_probe()
587 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq, in s3c_rtc_probe()
588 0, "s3c2410-rtc alarm", info); in s3c_rtc_probe()
590 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret); in s3c_rtc_probe()
594 ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq, in s3c_rtc_probe()
595 0, "s3c2410-rtc tick", info); in s3c_rtc_probe()
597 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret); in s3c_rtc_probe()
601 if (info->data->select_tick_clk) in s3c_rtc_probe()
602 info->data->select_tick_clk(info); in s3c_rtc_probe()
609 if (info->data->disable) in s3c_rtc_probe()
610 info->data->disable(info); in s3c_rtc_probe()
612 if (info->data->needs_src_clk) in s3c_rtc_probe()
613 clk_disable_unprepare(info->rtc_src_clk); in s3c_rtc_probe()
615 clk_disable_unprepare(info->rtc_clk); in s3c_rtc_probe()
632 if (info->data->save_tick_cnt) in s3c_rtc_suspend()
633 info->data->save_tick_cnt(info); in s3c_rtc_suspend()
635 if (info->data->disable) in s3c_rtc_suspend()
636 info->data->disable(info); in s3c_rtc_suspend()
638 if (device_may_wakeup(dev) && !info->wake_en) { in s3c_rtc_suspend()
639 if (enable_irq_wake(info->irq_alarm) == 0) in s3c_rtc_suspend()
640 info->wake_en = true; in s3c_rtc_suspend()
652 if (info->data->enable) in s3c_rtc_resume()
653 info->data->enable(info); in s3c_rtc_resume()
655 if (info->data->restore_tick_cnt) in s3c_rtc_resume()
656 info->data->restore_tick_cnt(info); in s3c_rtc_resume()
660 if (device_may_wakeup(dev) && info->wake_en) { in s3c_rtc_resume()
661 disable_irq_wake(info->irq_alarm); in s3c_rtc_resume()
662 info->wake_en = false; in s3c_rtc_resume()
672 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c24xx_rtc_irq()
677 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c6410_rtc_irq()
678 writeb(mask, info->base + S3C2410_INTP); in s3c6410_rtc_irq()
686 tmp = readb(info->base + S3C2410_TICNT); in s3c2410_rtc_setfreq()
689 val = (info->rtc->max_user_freq / freq) - 1; in s3c2410_rtc_setfreq()
692 writel(tmp, info->base + S3C2410_TICNT); in s3c2410_rtc_setfreq()
700 tmp = readb(info->base + S3C2410_TICNT); in s3c2416_rtc_setfreq()
703 val = (info->rtc->max_user_freq / freq) - 1; in s3c2416_rtc_setfreq()
706 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); in s3c2416_rtc_setfreq()
708 writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2); in s3c2416_rtc_setfreq()
710 writel(tmp, info->base + S3C2410_TICNT); in s3c2416_rtc_setfreq()
718 tmp = readb(info->base + S3C2410_TICNT); in s3c2443_rtc_setfreq()
721 val = (info->rtc->max_user_freq / freq) - 1; in s3c2443_rtc_setfreq()
724 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); in s3c2443_rtc_setfreq()
726 writel(tmp, info->base + S3C2410_TICNT); in s3c2443_rtc_setfreq()
733 val = (info->rtc->max_user_freq / freq) - 1; in s3c6410_rtc_setfreq()
734 writel(val, info->base + S3C2410_TICNT); in s3c6410_rtc_setfreq()
741 ticnt = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_enable_tick()
751 con = readw(info->base + S3C2410_RTCCON); in s3c2416_rtc_select_tick_clk()
753 writew(con, info->base + S3C2410_RTCCON); in s3c2416_rtc_select_tick_clk()
760 ticnt = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_enable_tick()
768 info->ticnt_save = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_save_tick_cnt()
773 writeb(info->ticnt_save, info->base + S3C2410_TICNT); in s3c24xx_rtc_restore_tick_cnt()
778 info->ticnt_en_save = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_save_tick_cnt()
779 info->ticnt_en_save &= S3C64XX_RTCCON_TICEN; in s3c6410_rtc_save_tick_cnt()
780 info->ticnt_save = readl(info->base + S3C2410_TICNT); in s3c6410_rtc_save_tick_cnt()
787 writel(info->ticnt_save, info->base + S3C2410_TICNT); in s3c6410_rtc_restore_tick_cnt()
788 if (info->ticnt_en_save) { in s3c6410_rtc_restore_tick_cnt()
789 con = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_restore_tick_cnt()
790 writew(con | info->ticnt_en_save, info->base + S3C2410_RTCCON); in s3c6410_rtc_restore_tick_cnt()
843 .compatible = "samsung,s3c2410-rtc",
846 .compatible = "samsung,s3c2416-rtc",
849 .compatible = "samsung,s3c2443-rtc",
852 .compatible = "samsung,s3c6410-rtc",
855 .compatible = "samsung,exynos3250-rtc",
866 .name = "s3c-rtc",
873 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
876 MODULE_ALIAS("platform:s3c2410-rtc");