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/* $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
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