[thirdparty/u-boot.git] / drivers / rtc / mcfrtc.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
 */

#include <common.h>

#include <command.h>
#include <rtc.h>
#include <asm/immap.h>
#include <asm/rtc.h>

#undef RTC_DEBUG

#ifndef CONFIG_SYS_MCFRTC_BASE
#error RTC_BASE is not defined!
#endif

#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
#define	STARTOFTIME		1970

int rtc_get(struct rtc_time *tmp)
{
	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);

	int rtc_days, rtc_hrs, rtc_mins;
	int tim;

	rtc_days = rtc->days;
	rtc_hrs = rtc->hourmin >> 8;
	rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);

	tim = (rtc_days * 24) + rtc_hrs;
	tim = (tim * 60) + rtc_mins;
	tim = (tim * 60) + rtc->seconds;

	rtc_to_tm(tim, tmp);

	tmp->tm_yday = 0;
	tmp->tm_isdst = 0;

#ifdef RTC_DEBUG
	printf("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
	       tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	       tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
#endif

	return 0;
}

int rtc_set(struct rtc_time *tmp)
{
	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);

	static int month_days[12] = {
		31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
	};
	int days, i, months;

	if (tmp->tm_year > 2037) {
		printf("Unable to handle. Exceeding integer limitation!\n");
		tmp->tm_year = 2027;
	}
#ifdef RTC_DEBUG
	printf("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
	       tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	       tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
#endif

	/* calculate days by years */
	for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
		days += 365 + isleap(i);
	}

	/* calculate days by months */
	months = tmp->tm_mon - 1;
	for (i = 0; i < months; i++) {
		days += month_days[i];

		if (i == 1)
			days += isleap(i);
	}

	days += tmp->tm_mday - 1;

	rtc->days = days;
	rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min;
	rtc->seconds = tmp->tm_sec;

	return 0;
}

void rtc_reset(void)
{
	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);

	if ((rtc->cr & RTC_CR_EN) == 0) {
		printf("real-time-clock was stopped. Now starting...\n");
		rtc->cr |= RTC_CR_EN;
	}

	rtc->cr |= RTC_CR_SWR;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
8e585f02	2	/*
5cdc07c7 TL	3	* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
5cdc07c7 TL	4	* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8e585f02 TL	5	*/
	6
	7	#include <common.h>
3e66c078	8
8e585f02 TL	9	#include <command.h>
8e585f02 TL	10	#include <rtc.h>
5cdc07c7 TL	11	#include <asm/immap.h>
5cdc07c7 TL	12	#include <asm/rtc.h>
8e585f02	13
8e585f02 TL	14	#undef RTC_DEBUG
8e585f02 TL	15
6d0f6bcf	16	#ifndef CONFIG_SYS_MCFRTC_BASE
8e585f02 TL	17	#error RTC_BASE is not defined!
	18	#endif
	19
	20	#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) \|\| ((y) % 400) == 0)
	21	#define STARTOFTIME 1970
	22
b73a19e1	23	int rtc_get(struct rtc_time *tmp)
8e585f02	24	{
6d0f6bcf	25	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	26
	27	int rtc_days, rtc_hrs, rtc_mins;
	28	int tim;
	29
	30	rtc_days = rtc->days;
	31	rtc_hrs = rtc->hourmin >> 8;
	32	rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);
	33
	34	tim = (rtc_days * 24) + rtc_hrs;
	35	tim = (tim * 60) + rtc_mins;
	36	tim = (tim * 60) + rtc->seconds;
	37
9f9276c3	38	rtc_to_tm(tim, tmp);
8e585f02 TL	39
	40	tmp->tm_yday = 0;
	41	tmp->tm_isdst = 0;
	42
	43	#ifdef RTC_DEBUG
	44	printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	45	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	46	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	47	#endif
b73a19e1 YT	48
b73a19e1 YT	49	return 0;
8e585f02 TL	50	}
8e585f02 TL	51
d1e23194	52	int rtc_set(struct rtc_time *tmp)
8e585f02	53	{
6d0f6bcf	54	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	55
	56	static int month_days[12] = {
	57	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
	58	};
	59	int days, i, months;
	60
	61	if (tmp->tm_year > 2037) {
	62	printf("Unable to handle. Exceeding integer limitation!\n");
	63	tmp->tm_year = 2027;
	64	}
	65	#ifdef RTC_DEBUG
	66	printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	67	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	68	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	69	#endif
	70
	71	/* calculate days by years */
	72	for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
	73	days += 365 + isleap(i);
	74	}
	75
	76	/* calculate days by months */
	77	months = tmp->tm_mon - 1;
	78	for (i = 0; i < months; i++) {
	79	days += month_days[i];
	80
	81	if (i == 1)
	82	days += isleap(i);
	83	}
	84
	85	days += tmp->tm_mday - 1;
	86
	87	rtc->days = days;
	88	rtc->hourmin = (tmp->tm_hour << 8) \| tmp->tm_min;
	89	rtc->seconds = tmp->tm_sec;
d1e23194 JCPV	90
d1e23194 JCPV	91	return 0;
8e585f02 TL	92	}
	93
	94	void rtc_reset(void)
	95	{
6d0f6bcf	96	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	97
	98	if ((rtc->cr & RTC_CR_EN) == 0) {
	99	printf("real-time-clock was stopped. Now starting...\n");
	100	rtc->cr \|= RTC_CR_EN;
	101	}
	102
	103	rtc->cr \|= RTC_CR_SWR;
	104	}