Commit 5c4fa2eea0d68764766b5996baa5508f64f1f64b
Committed by
Wolfgang Denk
1 parent
466f0137e8
Exists in
master
and in
54 other branches
rtc: add support for Micro Crystal RV-3029-C2 RTC
Signed-off-by: Heiko Schocher <hs@denx.de>
Showing 2 changed files with 125 additions and 0 deletions Side-by-side Diff
drivers/rtc/Makefile
... | ... | @@ -60,6 +60,7 @@ |
60 | 60 | COBJS-$(CONFIG_RTC_PT7C4338) += pt7c4338.o |
61 | 61 | COBJS-$(CONFIG_RTC_RS5C372A) += rs5c372.o |
62 | 62 | COBJS-$(CONFIG_RTC_RTC4543) += rtc4543.o |
63 | +COBJS-$(CONFIG_RTC_RV3029) += rv3029.o | |
63 | 64 | COBJS-$(CONFIG_RTC_RX8025) += rx8025.o |
64 | 65 | COBJS-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o |
65 | 66 | COBJS-$(CONFIG_RTC_S3C44B0) += s3c44b0_rtc.o |
drivers/rtc/rv3029.c
1 | +/* | |
2 | + * (C) Copyright 2010 | |
3 | + * Heiko Schocher, DENX Software Engineering, hs@denx.de | |
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 | +#include <common.h> | |
24 | +#include <command.h> | |
25 | +#include <i2c.h> | |
26 | +#include <rtc.h> | |
27 | + | |
28 | +#define RTC_RV3029_CTRL_RESET 0x04 | |
29 | +#define RTC_RV3029_CTRL_SYS_R (1 << 4) | |
30 | + | |
31 | +#define RTC_RV3029_CLOCK_PAGE 0x08 | |
32 | +#define RTC_RV3029_PAGE_LEN 7 | |
33 | + | |
34 | +#define RV3029C2_W_SECONDS 0x00 | |
35 | +#define RV3029C2_W_MINUTES 0x01 | |
36 | +#define RV3029C2_W_HOURS 0x02 | |
37 | +#define RV3029C2_W_DATE 0x03 | |
38 | +#define RV3029C2_W_DAYS 0x04 | |
39 | +#define RV3029C2_W_MONTHS 0x05 | |
40 | +#define RV3029C2_W_YEARS 0x06 | |
41 | + | |
42 | +#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */ | |
43 | +#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */ | |
44 | + | |
45 | +int rtc_get( struct rtc_time *tmp ) | |
46 | +{ | |
47 | + int ret; | |
48 | + unsigned char buf[RTC_RV3029_PAGE_LEN]; | |
49 | + | |
50 | + ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \ | |
51 | + RTC_RV3029_PAGE_LEN); | |
52 | + if (ret) { | |
53 | + printf("%s: error reading RTC: %x\n", __func__, ret); | |
54 | + return -1; | |
55 | + } | |
56 | + tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f); | |
57 | + tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f); | |
58 | + if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) { | |
59 | + /* 12h format */ | |
60 | + tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f); | |
61 | + if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM) | |
62 | + /* PM flag set */ | |
63 | + tmp->tm_hour += 12; | |
64 | + } else | |
65 | + tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f); | |
66 | + | |
67 | + tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F ); | |
68 | + tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F ); | |
69 | + tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 ); | |
70 | + /* RTC supports only years > 1999 */ | |
71 | + tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000; | |
72 | + tmp->tm_yday = 0; | |
73 | + tmp->tm_isdst = 0; | |
74 | + | |
75 | +#ifdef RTC_DEBUG | |
76 | + printf( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", | |
77 | + tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, | |
78 | + tmp->tm_hour, tmp->tm_min, tmp->tm_sec ); | |
79 | + | |
80 | +#endif | |
81 | + return 0; | |
82 | +} | |
83 | + | |
84 | +int rtc_set( struct rtc_time *tmp ) | |
85 | +{ | |
86 | + int ret; | |
87 | + unsigned char buf[RTC_RV3029_PAGE_LEN]; | |
88 | +#ifdef RTC_DEBUG | |
89 | + printf( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", | |
90 | + tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, | |
91 | + tmp->tm_hour, tmp->tm_min, tmp->tm_sec); | |
92 | +#endif | |
93 | + | |
94 | + if (tmp->tm_year < 2000) { | |
95 | + printf("RTC: year %d < 2000 not possible\n", tmp->tm_year); | |
96 | + return -1; | |
97 | + } | |
98 | + buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec); | |
99 | + buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min); | |
100 | + buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour); | |
101 | + /* set 24h format */ | |
102 | + buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24; | |
103 | + buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday); | |
104 | + buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday); | |
105 | + buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon); | |
106 | + tmp->tm_year -= 2000; | |
107 | + buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year); | |
108 | + ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, | |
109 | + buf, RTC_RV3029_PAGE_LEN); | |
110 | + | |
111 | + /* give the RTC some time to update */ | |
112 | + udelay(1000); | |
113 | + return 0; | |
114 | +} | |
115 | + | |
116 | +void rtc_reset (void) | |
117 | +{ | |
118 | + int ret; | |
119 | + unsigned char buf[RTC_RV3029_PAGE_LEN]; | |
120 | + | |
121 | + buf[0] = RTC_RV3029_CTRL_SYS_R; | |
122 | + ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1, | |
123 | + buf, 1); | |
124 | +} |