101 lines
2.1 KiB
C
101 lines
2.1 KiB
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
|
|
|
|
#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;
|
|
}
|