/* $Id: rtc.h,v 1.7 2002/11/04 07:32:09 starvik Exp $ */ #ifndef __RTC_H__#define __RTC_H__   #ifdef CONFIG_ETRAX_DS1302   /* 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 */ #elif defined(CONFIG_ETRAX_PCF8563)   /* I2C bus slave registers. */#  define RTC_I2C_READ		0xa3#  define RTC_I2C_WRITE		0xa2    /* Phillips PCF8563 registers. */#  define RTC_CONTROL1		0x00		/* Control/Status register 1. */#  define RTC_CONTROL2		0x01		/* Control/Status register 2. */#  define RTC_CLOCKOUT_FREQ	0x0d		/* CLKOUT frequency. */#  define RTC_TIMER_CONTROL	0x0e		/* Timer control. */#  define RTC_TIMER_CNTDOWN	0x0f		/* Timer countdown. */    /* BCD encoded clock registers. */#  define RTC_SECONDS		0x02#  define RTC_MINUTES		0x03#  define RTC_HOURS		0x04#  define RTC_DAY_OF_MONTH	0x05#  define RTC_WEEKDAY		0x06	/* Not coded in BCD! */#  define RTC_MONTH		0x07#  define RTC_YEAR		0x08#  define RTC_MINUTE_ALARM	0x09#  define RTC_HOUR_ALARM	0x0a#  define RTC_DAY_ALARM		0x0b#  define RTC_WEEKDAY_ALARM 0x0c #endif #ifdef CONFIG_ETRAX_DS1302extern 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()#elif defined(CONFIG_ETRAX_PCF8563)extern unsigned char pcf8563_readreg(int reg);extern void pcf8563_writereg(int reg, unsigned char val);extern int pcf8563_init(void);#  define CMOS_READ(x) pcf8563_readreg(x)#  define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)#  define RTC_INIT() pcf8563_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 <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_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_VLOW_RD     _IOR(RTC_MAGIC, 0x11, int)  /* Voltage Low detector */#define RTC_VLOW_SET    _IO(RTC_MAGIC, 0x12)        /* Clear voltage low information */#define RTC_MAX_IOCTL 0x12 #endif /* __RTC_H__ */