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1 | /* |
2 | * (C) Copyright 2007 | |
3 | * Freescale Semiconductor 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 | #include <command.h> | |
26 | #include <rtc.h> | |
27 | ||
28 | #include <asm/mcfrtc.h> | |
29 | ||
30 | #if defined(CONFIG_MCFRTC) && (CONFIG_COMMANDS & CFG_CMD_DATE) | |
31 | ||
32 | #undef RTC_DEBUG | |
33 | ||
34 | #ifndef CFG_MCFRTC_BASE | |
35 | #error RTC_BASE is not defined! | |
36 | #endif | |
37 | ||
38 | #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) | |
39 | #define STARTOFTIME 1970 | |
40 | ||
41 | void rtc_get(struct rtc_time *tmp) | |
42 | { | |
43 | volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE); | |
44 | ||
45 | int rtc_days, rtc_hrs, rtc_mins; | |
46 | int tim; | |
47 | ||
48 | rtc_days = rtc->days; | |
49 | rtc_hrs = rtc->hourmin >> 8; | |
50 | rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin); | |
51 | ||
52 | tim = (rtc_days * 24) + rtc_hrs; | |
53 | tim = (tim * 60) + rtc_mins; | |
54 | tim = (tim * 60) + rtc->seconds; | |
55 | ||
56 | to_tm(tim, tmp); | |
57 | ||
58 | tmp->tm_yday = 0; | |
59 | tmp->tm_isdst = 0; | |
60 | ||
61 | #ifdef RTC_DEBUG | |
62 | printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", | |
63 | tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, | |
64 | tmp->tm_hour, tmp->tm_min, tmp->tm_sec); | |
65 | #endif | |
66 | } | |
67 | ||
68 | void rtc_set(struct rtc_time *tmp) | |
69 | { | |
70 | volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE); | |
71 | ||
72 | static int month_days[12] = { | |
73 | 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 | |
74 | }; | |
75 | int days, i, months; | |
76 | ||
77 | if (tmp->tm_year > 2037) { | |
78 | printf("Unable to handle. Exceeding integer limitation!\n"); | |
79 | tmp->tm_year = 2027; | |
80 | } | |
81 | #ifdef RTC_DEBUG | |
82 | printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", | |
83 | tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, | |
84 | tmp->tm_hour, tmp->tm_min, tmp->tm_sec); | |
85 | #endif | |
86 | ||
87 | /* calculate days by years */ | |
88 | for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) { | |
89 | days += 365 + isleap(i); | |
90 | } | |
91 | ||
92 | /* calculate days by months */ | |
93 | months = tmp->tm_mon - 1; | |
94 | for (i = 0; i < months; i++) { | |
95 | days += month_days[i]; | |
96 | ||
97 | if (i == 1) | |
98 | days += isleap(i); | |
99 | } | |
100 | ||
101 | days += tmp->tm_mday - 1; | |
102 | ||
103 | rtc->days = days; | |
104 | rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min; | |
105 | rtc->seconds = tmp->tm_sec; | |
106 | } | |
107 | ||
108 | void rtc_reset(void) | |
109 | { | |
110 | volatile rtc_t *rtc = (rtc_t *) (CFG_MCFRTC_BASE); | |
111 | ||
112 | if ((rtc->cr & RTC_CR_EN) == 0) { | |
113 | printf("real-time-clock was stopped. Now starting...\n"); | |
114 | rtc->cr |= RTC_CR_EN; | |
115 | } | |
116 | ||
117 | rtc->cr |= RTC_CR_SWR; | |
118 | } | |
119 | ||
120 | #endif /* CONFIG_MCFRTC && CFG_CMD_DATE */ |