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

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
 * TsiChung Liew ([email protected])
 */

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

#undef RTC_DEBUG

#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 ([email protected])
8e585f02 TL	5	*/
8e585f02 TL	6
8e585f02 TL	7	#include <command.h>
8e585f02 TL	8	#include <rtc.h>
5cdc07c7 TL	9	#include <asm/immap.h>
5cdc07c7 TL	10	#include <asm/rtc.h>
8e585f02	11
8e585f02 TL	12	#undef RTC_DEBUG
8e585f02 TL	13
8e585f02 TL	14	#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) \|\| ((y) % 400) == 0)
	15	#define STARTOFTIME 1970
	16
b73a19e1	17	int rtc_get(struct rtc_time *tmp)
8e585f02	18	{
6d0f6bcf	19	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	20
	21	int rtc_days, rtc_hrs, rtc_mins;
	22	int tim;
	23
	24	rtc_days = rtc->days;
	25	rtc_hrs = rtc->hourmin >> 8;
	26	rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);
	27
	28	tim = (rtc_days * 24) + rtc_hrs;
	29	tim = (tim * 60) + rtc_mins;
	30	tim = (tim * 60) + rtc->seconds;
	31
9f9276c3	32	rtc_to_tm(tim, tmp);
8e585f02 TL	33
	34	tmp->tm_yday = 0;
	35	tmp->tm_isdst = 0;
	36
	37	#ifdef RTC_DEBUG
	38	printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	39	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	40	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	41	#endif
b73a19e1 YT	42
b73a19e1 YT	43	return 0;
8e585f02 TL	44	}
8e585f02 TL	45
d1e23194	46	int rtc_set(struct rtc_time *tmp)
8e585f02	47	{
6d0f6bcf	48	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	49
	50	static int month_days[12] = {
	51	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
	52	};
	53	int days, i, months;
	54
	55	if (tmp->tm_year > 2037) {
	56	printf("Unable to handle. Exceeding integer limitation!\n");
	57	tmp->tm_year = 2027;
	58	}
	59	#ifdef RTC_DEBUG
	60	printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	61	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	62	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	63	#endif
	64
	65	/* calculate days by years */
	66	for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
	67	days += 365 + isleap(i);
	68	}
	69
	70	/* calculate days by months */
	71	months = tmp->tm_mon - 1;
	72	for (i = 0; i < months; i++) {
	73	days += month_days[i];
	74
	75	if (i == 1)
	76	days += isleap(i);
	77	}
	78
	79	days += tmp->tm_mday - 1;
	80
	81	rtc->days = days;
	82	rtc->hourmin = (tmp->tm_hour << 8) \| tmp->tm_min;
	83	rtc->seconds = tmp->tm_sec;
d1e23194 JCPV	84
d1e23194 JCPV	85	return 0;
8e585f02 TL	86	}
	87
	88	void rtc_reset(void)
	89	{
6d0f6bcf	90	volatile rtc_t rtc = (rtc_t ) (CONFIG_SYS_MCFRTC_BASE);
8e585f02 TL	91
	92	if ((rtc->cr & RTC_CR_EN) == 0) {
	93	printf("real-time-clock was stopped. Now starting...\n");
	94	rtc->cr \|= RTC_CR_EN;
	95	}
	96
	97	rtc->cr \|= RTC_CR_SWR;
	98	}