/* $Id: rtc.h,v 1.3 2001/03/21 09:56:31 magnusmn Exp $ */#ifndef RTC_H#define RTC_H#include <linux/config.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_ETRAX_DS1302#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/* conversions to and from the stupid RTC internal format */#define BCD_TO_BIN(x) x = (((x & 0xf0) >> 3) * 5 + (x & 0xf))#define BIN_TO_BCD(x) x = (x % 10) | ((x / 10) << 4) /* * The struct used to pass data via the following ioctl. Similar to the * struct tm in <time.h>, 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_RD_TIME	_IOR('p', 0x09, struct rtc_time) /* Read RTC time   */#define RTC_SET_TIME	_IOW('p', 0x0a, struct rtc_time) /* Set RTC time    */#define RTC_SET_CHARGE  _IOW('p', 0x0b, int) /* Set CHARGE mode    */#endif