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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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
TsiChung Liew8e585f02007-06-18 13:50:13 -05006 */
7
8#include <common.h>
TsiChung Liew8e585f02007-06-18 13:50:13 -05009
Michal Simek871c18d2008-07-14 19:45:37 +020010#if defined(CONFIG_CMD_DATE)
TsiChung Liew8e585f02007-06-18 13:50:13 -050011
Wolfgang Denk3e66c072007-08-19 10:27:34 +020012#include <command.h>
13#include <rtc.h>
14#include <asm/immap.h>
15#include <asm/rtc.h>
16
TsiChung Liew8e585f02007-06-18 13:50:13 -050017#undef RTC_DEBUG
18
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020019#ifndef CONFIG_SYS_MCFRTC_BASE
TsiChung Liew8e585f02007-06-18 13:50:13 -050020#error RTC_BASE is not defined!
21#endif
22
23#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
24#define STARTOFTIME 1970
25
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030026int rtc_get(struct rtc_time *tmp)
TsiChung Liew8e585f02007-06-18 13:50:13 -050027{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020028 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -050029
30 int rtc_days, rtc_hrs, rtc_mins;
31 int tim;
32
33 rtc_days = rtc->days;
34 rtc_hrs = rtc->hourmin >> 8;
35 rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);
36
37 tim = (rtc_days * 24) + rtc_hrs;
38 tim = (tim * 60) + rtc_mins;
39 tim = (tim * 60) + rtc->seconds;
40
41 to_tm(tim, tmp);
42
43 tmp->tm_yday = 0;
44 tmp->tm_isdst = 0;
45
46#ifdef RTC_DEBUG
47 printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
48 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
49 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
50#endif
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030051
52 return 0;
TsiChung Liew8e585f02007-06-18 13:50:13 -050053}
54
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +020055int rtc_set(struct rtc_time *tmp)
TsiChung Liew8e585f02007-06-18 13:50:13 -050056{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020057 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -050058
59 static int month_days[12] = {
60 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
61 };
62 int days, i, months;
63
64 if (tmp->tm_year > 2037) {
65 printf("Unable to handle. Exceeding integer limitation!\n");
66 tmp->tm_year = 2027;
67 }
68#ifdef RTC_DEBUG
69 printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
70 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
71 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
72#endif
73
74 /* calculate days by years */
75 for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
76 days += 365 + isleap(i);
77 }
78
79 /* calculate days by months */
80 months = tmp->tm_mon - 1;
81 for (i = 0; i < months; i++) {
82 days += month_days[i];
83
84 if (i == 1)
85 days += isleap(i);
86 }
87
88 days += tmp->tm_mday - 1;
89
90 rtc->days = days;
91 rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min;
92 rtc->seconds = tmp->tm_sec;
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +020093
94 return 0;
TsiChung Liew8e585f02007-06-18 13:50:13 -050095}
96
97void rtc_reset(void)
98{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020099 volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
TsiChung Liew8e585f02007-06-18 13:50:13 -0500100
101 if ((rtc->cr & RTC_CR_EN) == 0) {
102 printf("real-time-clock was stopped. Now starting...\n");
103 rtc->cr |= RTC_CR_EN;
104 }
105
106 rtc->cr |= RTC_CR_SWR;
107}
108
TsiChungLiewab77bc52007-08-15 15:39:17 -0500109#endif /* CONFIG_MCFRTC && CONFIG_CMD_DATE */