/* * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #if defined(CONFIG_MCFRTC) && defined(CONFIG_CMD_DATE) #include <command.h> #include <rtc.h> #include <asm/immap.h> #include <asm/rtc.h> #undef RTC_DEBUG #ifndef CFG_MCFRTC_BASE #error RTC_BASE is not defined! #endif #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) #define STARTOFTIME 1970 void rtc_get(struct rtc_time *tmp) { volatile rtc_t *rtc = (rtc_t *) (CFG_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; 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 } void rtc_set(struct rtc_time *tmp) { volatile rtc_t *rtc = (rtc_t *) (CFG_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; } void rtc_reset(void) { volatile rtc_t *rtc = (rtc_t *) (CFG_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; } #endif /* CONFIG_MCFRTC && CONFIG_CMD_DATE */