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1da177e4 LT |
1 | /* $Id: rtc.h,v 1.1.1.1 2004/03/25 04:29:22 hitoshiy Exp $ */ |
2 | ||
3 | #ifndef __RTC_H__ | |
4 | #define __RTC_H__ | |
5 | ||
6 | ||
7 | #include <linux/config.h> | |
8 | ||
9 | /* Dallas DS1302 clock/calendar register numbers. */ | |
10 | # define RTC_SECONDS 0 | |
11 | # define RTC_MINUTES 1 | |
12 | # define RTC_HOURS 2 | |
13 | # define RTC_DAY_OF_MONTH 3 | |
14 | # define RTC_MONTH 4 | |
15 | # define RTC_WEEKDAY 5 | |
16 | # define RTC_YEAR 6 | |
17 | # define RTC_CONTROL 7 | |
18 | ||
19 | /* Bits in CONTROL register. */ | |
20 | # define RTC_CONTROL_WRITEPROTECT 0x80 | |
21 | # define RTC_TRICKLECHARGER 8 | |
22 | ||
23 | /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */ | |
24 | # define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */ | |
25 | # define RTC_TCR_1DIOD 0x04 /* xxxx01xx */ | |
26 | # define RTC_TCR_2DIOD 0x08 /* xxxx10xx */ | |
27 | # define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */ | |
28 | # define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */ | |
29 | # define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */ | |
30 | # define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */ | |
31 | ||
32 | #ifdef CONFIG_DS1302 | |
33 | extern unsigned char ds1302_readreg(int reg); | |
34 | extern void ds1302_writereg(int reg, unsigned char val); | |
35 | extern int ds1302_init(void); | |
36 | # define CMOS_READ(x) ds1302_readreg(x) | |
37 | # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val) | |
38 | # define RTC_INIT() ds1302_init() | |
39 | #else | |
40 | /* No RTC configured so we shouldn't try to access any. */ | |
41 | # define CMOS_READ(x) 42 | |
42 | # define CMOS_WRITE(x,y) | |
43 | # define RTC_INIT() (-1) | |
44 | #endif | |
45 | ||
46 | /* | |
47 | * The struct used to pass data via the following ioctl. Similar to the | |
48 | * struct tm in <time.h>, but it needs to be here so that the kernel | |
49 | * source is self contained, allowing cross-compiles, etc. etc. | |
50 | */ | |
51 | struct rtc_time { | |
52 | int tm_sec; | |
53 | int tm_min; | |
54 | int tm_hour; | |
55 | int tm_mday; | |
56 | int tm_mon; | |
57 | int tm_year; | |
58 | int tm_wday; | |
59 | int tm_yday; | |
60 | int tm_isdst; | |
61 | }; | |
62 | ||
63 | /* ioctl() calls that are permitted to the /dev/rtc interface. */ | |
64 | #define RTC_MAGIC 'p' | |
65 | #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */ | |
66 | #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */ | |
67 | #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int) | |
68 | #define RTC_MAX_IOCTL 0x0b | |
69 | ||
70 | #endif /* __RTC_H__ */ |