1 /* 2 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. 3 * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 26 #if defined(CONFIG_CMD_DATE) 27 28 #include <command.h> 29 #include <rtc.h> 30 #include <asm/immap.h> 31 #include <asm/rtc.h> 32 33 #undef RTC_DEBUG 34 35 #ifndef CONFIG_SYS_MCFRTC_BASE 36 #error RTC_BASE is not defined! 37 #endif 38 39 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) 40 #define STARTOFTIME 1970 41 42 int rtc_get(struct rtc_time *tmp) 43 { 44 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); 45 46 int rtc_days, rtc_hrs, rtc_mins; 47 int tim; 48 49 rtc_days = rtc->days; 50 rtc_hrs = rtc->hourmin >> 8; 51 rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin); 52 53 tim = (rtc_days * 24) + rtc_hrs; 54 tim = (tim * 60) + rtc_mins; 55 tim = (tim * 60) + rtc->seconds; 56 57 to_tm(tim, tmp); 58 59 tmp->tm_yday = 0; 60 tmp->tm_isdst = 0; 61 62 #ifdef RTC_DEBUG 63 printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 64 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 65 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 66 #endif 67 68 return 0; 69 } 70 71 int rtc_set(struct rtc_time *tmp) 72 { 73 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); 74 75 static int month_days[12] = { 76 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 77 }; 78 int days, i, months; 79 80 if (tmp->tm_year > 2037) { 81 printf("Unable to handle. Exceeding integer limitation!\n"); 82 tmp->tm_year = 2027; 83 } 84 #ifdef RTC_DEBUG 85 printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 86 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 87 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 88 #endif 89 90 /* calculate days by years */ 91 for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) { 92 days += 365 + isleap(i); 93 } 94 95 /* calculate days by months */ 96 months = tmp->tm_mon - 1; 97 for (i = 0; i < months; i++) { 98 days += month_days[i]; 99 100 if (i == 1) 101 days += isleap(i); 102 } 103 104 days += tmp->tm_mday - 1; 105 106 rtc->days = days; 107 rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min; 108 rtc->seconds = tmp->tm_sec; 109 110 return 0; 111 } 112 113 void rtc_reset(void) 114 { 115 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE); 116 117 if ((rtc->cr & RTC_CR_EN) == 0) { 118 printf("real-time-clock was stopped. Now starting...\n"); 119 rtc->cr |= RTC_CR_EN; 120 } 121 122 rtc->cr |= RTC_CR_SWR; 123 } 124 125 #endif /* CONFIG_MCFRTC && CONFIG_CMD_DATE */ 126