MINI2440: Removed unneeded dependency
[u-boot-openmoko/mini2440.git] / drivers / rtc / mcfrtc.c
blobd235d10f28fceca8c767b2a848bdf211339fde30
1 /*
2 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
3 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
5 * See file CREDITS for list of people who contributed to this
6 * project.
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.
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.
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
24 #include <common.h>
26 #if defined(CONFIG_MCFRTC) && defined(CONFIG_CMD_DATE)
28 #include <command.h>
29 #include <rtc.h>
30 #include <asm/immap.h>
31 #include <asm/rtc.h>
33 #undef RTC_DEBUG
35 #ifndef CFG_MCFRTC_BASE
36 #error RTC_BASE is not defined!
37 #endif
39 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
40 #define STARTOFTIME 1970
42 int rtc_get(struct rtc_time *tmp)
44 volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE);
46 int rtc_days, rtc_hrs, rtc_mins;
47 int tim;
49 rtc_days = rtc->days;
50 rtc_hrs = rtc->hourmin >> 8;
51 rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);
53 tim = (rtc_days * 24) + rtc_hrs;
54 tim = (tim * 60) + rtc_mins;
55 tim = (tim * 60) + rtc->seconds;
57 to_tm(tim, tmp);
59 tmp->tm_yday = 0;
60 tmp->tm_isdst = 0;
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
68 return 0;
71 void rtc_set(struct rtc_time *tmp)
73 volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE);
75 static int month_days[12] = {
76 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
78 int days, i, months;
80 if (tmp->tm_year > 2037) {
81 printf("Unable to handle. Exceeding integer limitation!\n");
82 tmp->tm_year = 2027;
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
90 /* calculate days by years */
91 for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
92 days += 365 + isleap(i);
95 /* calculate days by months */
96 months = tmp->tm_mon - 1;
97 for (i = 0; i < months; i++) {
98 days += month_days[i];
100 if (i == 1)
101 days += isleap(i);
104 days += tmp->tm_mday - 1;
106 rtc->days = days;
107 rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min;
108 rtc->seconds = tmp->tm_sec;
111 void rtc_reset(void)
113 volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE);
115 if ((rtc->cr & RTC_CR_EN) == 0) {
116 printf("real-time-clock was stopped. Now starting...\n");
117 rtc->cr |= RTC_CR_EN;
120 rtc->cr |= RTC_CR_SWR;
123 #endif /* CONFIG_MCFRTC && CONFIG_CMD_DATE */