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104 lines
2.2 KiB
104 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2004-2007 Freescale Semiconductor, Inc. |
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* TsiChung Liew ([email protected]) |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <rtc.h> |
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#include <asm/immap.h> |
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#include <asm/rtc.h> |
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#undef RTC_DEBUG |
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#ifndef CONFIG_SYS_MCFRTC_BASE |
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#error RTC_BASE is not defined! |
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#endif |
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#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) |
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#define STARTOFTIME 1970 |
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int rtc_get(struct rtc_time *tmp) |
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{ |
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volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); |
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int rtc_days, rtc_hrs, rtc_mins; |
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int tim; |
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rtc_days = rtc->days; |
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rtc_hrs = rtc->hourmin >> 8; |
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rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin); |
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tim = (rtc_days * 24) + rtc_hrs; |
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tim = (tim * 60) + rtc_mins; |
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tim = (tim * 60) + rtc->seconds; |
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rtc_to_tm(tim, tmp); |
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tmp->tm_yday = 0; |
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tmp->tm_isdst = 0; |
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#ifdef RTC_DEBUG |
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printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", |
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, |
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec); |
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#endif |
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return 0; |
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} |
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int rtc_set(struct rtc_time *tmp) |
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{ |
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volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); |
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static int month_days[12] = { |
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
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}; |
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int days, i, months; |
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if (tmp->tm_year > 2037) { |
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printf("Unable to handle. Exceeding integer limitation!\n"); |
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tmp->tm_year = 2027; |
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} |
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#ifdef RTC_DEBUG |
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printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", |
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, |
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec); |
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#endif |
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/* calculate days by years */ |
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for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) { |
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days += 365 + isleap(i); |
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} |
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/* calculate days by months */ |
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months = tmp->tm_mon - 1; |
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for (i = 0; i < months; i++) { |
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days += month_days[i]; |
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if (i == 1) |
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days += isleap(i); |
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} |
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days += tmp->tm_mday - 1; |
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rtc->days = days; |
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rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min; |
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rtc->seconds = tmp->tm_sec; |
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return 0; |
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} |
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void rtc_reset(void) |
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{ |
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volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); |
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if ((rtc->cr & RTC_CR_EN) == 0) { |
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printf("real-time-clock was stopped. Now starting...\n"); |
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rtc->cr |= RTC_CR_EN; |
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} |
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rtc->cr |= RTC_CR_SWR; |
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}
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