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TsiChung Liew8e585f02007-06-18 13:50:13 -05001/*
TsiChungLiew5cdc07c2007-07-05 23:31:25 -05002 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
3 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
TsiChung Liew8e585f02007-06-18 13:50:13 -05004 *
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>
TsiChung Liew8e585f02007-06-18 13:50:13 -050025
Michal Simek871c18d2008-07-14 19:45:37 +020026#if defined(CONFIG_CMD_DATE)
TsiChung Liew8e585f02007-06-18 13:50:13 -050027
Wolfgang Denk3e66c072007-08-19 10:27:34 +020028#include <command.h>
29#include <rtc.h>
30#include <asm/immap.h>
31#include <asm/rtc.h>
32
TsiChung Liew8e585f02007-06-18 13:50:13 -050033#undef RTC_DEBUG
34
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020035#ifndef CONFIG_SYS_MCFRTC_BASE
TsiChung Liew8e585f02007-06-18 13:50:13 -050036#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
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030042int rtc_get(struct rtc_time *tmp)
TsiChung Liew8e585f02007-06-18 13:50:13 -050043{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020044 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -050045
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
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030067
68 return 0;
TsiChung Liew8e585f02007-06-18 13:50:13 -050069}
70
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +020071int rtc_set(struct rtc_time *tmp)
TsiChung Liew8e585f02007-06-18 13:50:13 -050072{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020073 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -050074
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;
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +0200109
110 return 0;
TsiChung Liew8e585f02007-06-18 13:50:13 -0500111}
112
113void rtc_reset(void)
114{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200115 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -0500116
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
TsiChungLiewab77bc52007-08-15 15:39:17 -0500125#endif /* CONFIG_MCFRTC && CONFIG_CMD_DATE */