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