1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* (C) Copyright 2010
* Heiko Schocher, DENX Software Engineering, hs@denx.de
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <i2c.h>
#include <rtc.h>
#define RTC_RV3029_CTRL_RESET 0x04
#define RTC_RV3029_CTRL_SYS_R (1 << 4)
#define RTC_RV3029_CLOCK_PAGE 0x08
#define RTC_RV3029_PAGE_LEN 7
#define RV3029C2_W_SECONDS 0x00
#define RV3029C2_W_MINUTES 0x01
#define RV3029C2_W_HOURS 0x02
#define RV3029C2_W_DATE 0x03
#define RV3029C2_W_DAYS 0x04
#define RV3029C2_W_MONTHS 0x05
#define RV3029C2_W_YEARS 0x06
#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */
#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */
int rtc_get( struct rtc_time *tmp )
{
int ret;
unsigned char buf[RTC_RV3029_PAGE_LEN];
ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \
RTC_RV3029_PAGE_LEN);
if (ret) {
printf("%s: error reading RTC: %x\n", __func__, ret);
return -1;
}
tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f);
tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f);
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) {
/* 12h format */
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f);
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM)
/* PM flag set */
tmp->tm_hour += 12;
} else
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f);
tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F );
tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F );
tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 );
/* RTC supports only years > 1999 */
tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000;
tmp->tm_yday = 0;
tmp->tm_isdst = 0;
#ifdef RTC_DEBUG
printf( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec );
#endif
return 0;
}
int rtc_set( struct rtc_time *tmp )
{
int ret;
unsigned char buf[RTC_RV3029_PAGE_LEN];
#ifdef RTC_DEBUG
printf( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
#endif
if (tmp->tm_year < 2000) {
printf("RTC: year %d < 2000 not possible\n", tmp->tm_year);
return -1;
}
buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec);
buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min);
buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour);
/* set 24h format */
buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24;
buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday);
buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday);
buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon);
tmp->tm_year -= 2000;
buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year);
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1,
buf, RTC_RV3029_PAGE_LEN);
/* give the RTC some time to update */
udelay(1000);
return 0;
}
void rtc_reset (void)
{
int ret;
unsigned char buf[RTC_RV3029_PAGE_LEN];
buf[0] = RTC_RV3029_CTRL_SYS_R;
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1,
buf, 1);
}
|
