LXR linux/arch/cris/include/asm/rtc.h

   1
   2#ifndef __RTC_H__
   3#define __RTC_H__
   4
   5#ifdef CONFIG_ETRAX_DS1302
   6   /* Dallas DS1302 clock/calendar register numbers. */
   7#  define RTC_SECONDS      0
   8#  define RTC_MINUTES      1
   9#  define RTC_HOURS        2
  10#  define RTC_DAY_OF_MONTH 3
  11#  define RTC_MONTH        4
  12#  define RTC_WEEKDAY      5
  13#  define RTC_YEAR         6
  14#  define RTC_CONTROL      7
  15
  16   /* Bits in CONTROL register. */
  17#  define RTC_CONTROL_WRITEPROTECT      0x80
  18#  define RTC_TRICKLECHARGER            8
  19
  20  /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
  21#  define RTC_TCR_PATTERN       0xA0    /* 1010xxxx */
  22#  define RTC_TCR_1DIOD         0x04    /* xxxx01xx */
  23#  define RTC_TCR_2DIOD         0x08    /* xxxx10xx */
  24#  define RTC_TCR_DISABLED      0x00    /* xxxxxx00 Disabled */
  25#  define RTC_TCR_2KOHM         0x01    /* xxxxxx01 2KOhm */
  26#  define RTC_TCR_4KOHM         0x02    /* xxxxxx10 4kOhm */
  27#  define RTC_TCR_8KOHM         0x03    /* xxxxxx11 8kOhm */
  28
  29#elif defined(CONFIG_ETRAX_PCF8563)
  30   /* I2C bus slave registers. */
  31#  define RTC_I2C_READ          0xa3
  32#  define RTC_I2C_WRITE         0xa2
  33
  34   /* Phillips PCF8563 registers. */
  35#  define RTC_CONTROL1          0x00            /* Control/Status register 1. */
  36#  define RTC_CONTROL2          0x01            /* Control/Status register 2. */
  37#  define RTC_CLOCKOUT_FREQ     0x0d            /* CLKOUT frequency. */
  38#  define RTC_TIMER_CONTROL     0x0e            /* Timer control. */
  39#  define RTC_TIMER_CNTDOWN     0x0f            /* Timer countdown. */
  40
  41   /* BCD encoded clock registers. */
  42#  define RTC_SECONDS           0x02
  43#  define RTC_MINUTES           0x03
  44#  define RTC_HOURS             0x04
  45#  define RTC_DAY_OF_MONTH      0x05
  46#  define RTC_WEEKDAY           0x06    /* Not coded in BCD! */
  47#  define RTC_MONTH             0x07
  48#  define RTC_YEAR              0x08
  49#  define RTC_MINUTE_ALARM      0x09
  50#  define RTC_HOUR_ALARM        0x0a
  51#  define RTC_DAY_ALARM         0x0b
  52#  define RTC_WEEKDAY_ALARM 0x0c
  53
  54#endif
  55
  56#ifdef CONFIG_ETRAX_DS1302
  57extern unsigned char ds1302_readreg(int reg);
  58extern void ds1302_writereg(int reg, unsigned char val);
  59extern int ds1302_init(void);
  60#  define CMOS_READ(x) ds1302_readreg(x)
  61#  define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
  62#  define RTC_INIT() ds1302_init()
  63#elif defined(CONFIG_ETRAX_PCF8563)
  64extern unsigned char pcf8563_readreg(int reg);
  65extern void pcf8563_writereg(int reg, unsigned char val);
  66extern int pcf8563_init(void);
  67#  define CMOS_READ(x) pcf8563_readreg(x)
  68#  define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)
  69#  define RTC_INIT() pcf8563_init()
  70#else
  71  /* No RTC configured so we shouldn't try to access any. */
  72#  define CMOS_READ(x) 42
  73#  define CMOS_WRITE(x,y)
  74#  define RTC_INIT() (-1)
  75#endif
  76
  77/*
  78 * The struct used to pass data via the following ioctl. Similar to the
  79 * struct tm in <time.h>, but it needs to be here so that the kernel
  80 * source is self contained, allowing cross-compiles, etc. etc.
  81 */
  82struct rtc_time {
  83        int tm_sec;
  84        int tm_min;
  85        int tm_hour;
  86        int tm_mday;
  87        int tm_mon;
  88        int tm_year;
  89        int tm_wday;
  90        int tm_yday;
  91        int tm_isdst;
  92};
  93
  94/* ioctl() calls that are permitted to the /dev/rtc interface. */
  95#define RTC_MAGIC 'p'
  96/* Read RTC time. */
  97#define RTC_RD_TIME             _IOR(RTC_MAGIC, 0x09, struct rtc_time)
  98/* Set RTC time. */
  99#define RTC_SET_TIME            _IOW(RTC_MAGIC, 0x0a, struct rtc_time)
 100#define RTC_SET_CHARGE          _IOW(RTC_MAGIC, 0x0b, int)
 101/* Voltage low detector */
 102#define RTC_VL_READ             _IOR(RTC_MAGIC, 0x13, int)
 103/* Clear voltage low information */
 104#define RTC_VL_CLR              _IO(RTC_MAGIC, 0x14)
 105#define RTC_MAX_IOCTL 0x14
 106
 107#endif /* __RTC_H__ */
 108