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git.ipfire.org Git - people/ms/u-boot.git/blob - rtc/mcfrtc.c
3 * Freescale Semiconductor Tsi-Chung.Liew@freescale.com
5 * See file CREDITS for list of people who contributed to this
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,
28 #include <asm/mcfrtc.h>
30 #if defined(CONFIG_MCFRTC) && (CONFIG_COMMANDS & CFG_CMD_DATE)
34 #ifndef CFG_MCFRTC_BASE
35 #error RTC_BASE is not defined!
38 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
39 #define STARTOFTIME 1970
41 void rtc_get(struct rtc_time
*tmp
)
43 volatile rtc_t
*rtc
= (rtc_t
*) (CFG_MCFRTC_BASE
);
45 int rtc_days
, rtc_hrs
, rtc_mins
;
49 rtc_hrs
= rtc
->hourmin
>> 8;
50 rtc_mins
= RTC_HOURMIN_MINUTES(rtc
->hourmin
);
52 tim
= (rtc_days
* 24) + rtc_hrs
;
53 tim
= (tim
* 60) + rtc_mins
;
54 tim
= (tim
* 60) + rtc
->seconds
;
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
);
68 void rtc_set(struct rtc_time
*tmp
)
70 volatile rtc_t
*rtc
= (rtc_t
*) (CFG_MCFRTC_BASE
);
72 static int month_days
[12] = {
73 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
77 if (tmp
->tm_year
> 2037) {
78 printf("Unable to handle. Exceeding integer limitation!\n");
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
);
87 /* calculate days by years */
88 for (i
= STARTOFTIME
, days
= 0; i
< tmp
->tm_year
; i
++) {
89 days
+= 365 + isleap(i
);
92 /* calculate days by months */
93 months
= tmp
->tm_mon
- 1;
94 for (i
= 0; i
< months
; i
++) {
95 days
+= month_days
[i
];
101 days
+= tmp
->tm_mday
- 1;
104 rtc
->hourmin
= (tmp
->tm_hour
<< 8) | tmp
->tm_min
;
105 rtc
->seconds
= tmp
->tm_sec
;
110 volatile rtc_t
*rtc
= (rtc_t
*) (CFG_MCFRTC_BASE
);
112 if ((rtc
->cr
& RTC_CR_EN
) == 0) {
113 printf("real-time-clock was stopped. Now starting...\n");
114 rtc
->cr
|= RTC_CR_EN
;
117 rtc
->cr
|= RTC_CR_SWR
;
120 #endif /* CONFIG_MCFRTC && CFG_CMD_DATE */