/* $Id: rtc.h,v 1.1.1.1 2004/03/25 04:29:22 hitoshiy Exp $ */ #ifndef __RTC_H__ #define __RTC_H__ /* Dallas DS1302 clock/calendar register numbers. */ # define RTC_SECONDS 0 # define RTC_MINUTES 1 # define RTC_HOURS 2 # define RTC_DAY_OF_MONTH 3 # define RTC_MONTH 4 # define RTC_WEEKDAY 5 # define RTC_YEAR 6 # define RTC_CONTROL 7 /* Bits in CONTROL register. */ # define RTC_CONTROL_WRITEPROTECT 0x80 # define RTC_TRICKLECHARGER 8 /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */ # define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */ # define RTC_TCR_1DIOD 0x04 /* xxxx01xx */ # define RTC_TCR_2DIOD 0x08 /* xxxx10xx */ # define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */ # define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */ # define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */ # define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */ #ifdef CONFIG_DS1302 extern unsigned char ds1302_readreg(int reg); extern void ds1302_writereg(int reg, unsigned char val); extern int ds1302_init(void); # define CMOS_READ(x) ds1302_readreg(x) # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val) # define RTC_INIT() ds1302_init() #else /* No RTC configured so we shouldn't try to access any. */ # define CMOS_READ(x) 42 # define CMOS_WRITE(x,y) # define RTC_INIT() (-1) #endif /* * The struct used to pass data via the following ioctl. Similar to the * struct tm in , but it needs to be here so that the kernel * source is self contained, allowing cross-compiles, etc. etc. */ struct rtc_time { int tm_sec; int tm_min; int tm_hour; int tm_mday; int tm_mon; int tm_year; int tm_wday; int tm_yday; int tm_isdst; }; /* ioctl() calls that are permitted to the /dev/rtc interface. */ #define RTC_MAGIC 'p' #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */ #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */ #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int) #define RTC_MAX_IOCTL 0x0b #endif /* __RTC_H__ */