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// 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
#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;
}
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