Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* $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_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()

#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__ */