include/asm-cris/rtc.h

   1 /* $Id: rtc.h,v 1.7 2002/11/04 07:32:09 starvik Exp $ */
   2
   3 #ifndef __RTC_H__
   4 #define __RTC_H__
   5
   6
   7
   8 #ifdef CONFIG_ETRAX_DS1302
   9    /* Dallas DS1302 clock/calendar register numbers. */
  10 #  define RTC_SECONDS      0
  11 #  define RTC_MINUTES      1
  12 #  define RTC_HOURS        2
  13 #  define RTC_DAY_OF_MONTH 3
  14 #  define RTC_MONTH        4
  15 #  define RTC_WEEKDAY      5
  16 #  define RTC_YEAR         6
  17 #  define RTC_CONTROL      7
  18
  19    /* Bits in CONTROL register. */
  20 #  define RTC_CONTROL_WRITEPROTECT      0x80
  21 #  define RTC_TRICKLECHARGER            8
  22
  23   /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
  24 #  define RTC_TCR_PATTERN       0xA0    /* 1010xxxx */
  25 #  define RTC_TCR_1DIOD         0x04    /* xxxx01xx */
  26 #  define RTC_TCR_2DIOD         0x08    /* xxxx10xx */
  27 #  define RTC_TCR_DISABLED      0x00    /* xxxxxx00 Disabled */
  28 #  define RTC_TCR_2KOHM         0x01    /* xxxxxx01 2KOhm */
  29 #  define RTC_TCR_4KOHM         0x02    /* xxxxxx10 4kOhm */
  30 #  define RTC_TCR_8KOHM         0x03    /* xxxxxx11 8kOhm */
  31
  32 #elif defined(CONFIG_ETRAX_PCF8563)
  33    /* I2C bus slave registers. */
  34 #  define RTC_I2C_READ          0xa3
  35 #  define RTC_I2C_WRITE         0xa2
  36
  37    /* Phillips PCF8563 registers. */
  38 #  define RTC_CONTROL1          0x00            /* Control/Status register 1. */
  39 #  define RTC_CONTROL2          0x01            /* Control/Status register 2. */
  40 #  define RTC_CLOCKOUT_FREQ     0x0d            /* CLKOUT frequency. */
  41 #  define RTC_TIMER_CONTROL     0x0e            /* Timer control. */
  42 #  define RTC_TIMER_CNTDOWN     0x0f            /* Timer countdown. */
  43
  44    /* BCD encoded clock registers. */
  45 #  define RTC_SECONDS           0x02
  46 #  define RTC_MINUTES           0x03
  47 #  define RTC_HOURS             0x04
  48 #  define RTC_DAY_OF_MONTH      0x05
  49 #  define RTC_WEEKDAY           0x06    /* Not coded in BCD! */
  50 #  define RTC_MONTH             0x07
  51 #  define RTC_YEAR              0x08
  52 #  define RTC_MINUTE_ALARM      0x09
  53 #  define RTC_HOUR_ALARM        0x0a
  54 #  define RTC_DAY_ALARM         0x0b
  55 #  define RTC_WEEKDAY_ALARM 0x0c
  56
  57 #endif
  58
  59 #ifdef CONFIG_ETRAX_DS1302
  60 extern unsigned char ds1302_readreg(int reg);
  61 extern void ds1302_writereg(int reg, unsigned char val);
  62 extern int ds1302_init(void);
  63 #  define CMOS_READ(x) ds1302_readreg(x)
  64 #  define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
  65 #  define RTC_INIT() ds1302_init()
  66 #elif defined(CONFIG_ETRAX_PCF8563)
  67 extern unsigned char pcf8563_readreg(int reg);
  68 extern void pcf8563_writereg(int reg, unsigned char val);
  69 extern int pcf8563_init(void);
  70 #  define CMOS_READ(x) pcf8563_readreg(x)
  71 #  define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)
  72 #  define RTC_INIT() pcf8563_init()
  73 #else
  74   /* No RTC configured so we shouldn't try to access any. */
  75 #  define CMOS_READ(x) 42
  76 #  define CMOS_WRITE(x,y)
  77 #  define RTC_INIT() (-1)
  78 #endif
  79
  80 /*
  81  * The struct used to pass data via the following ioctl. Similar to the
  82  * struct tm in <time.h>, but it needs to be here so that the kernel
  83  * source is self contained, allowing cross-compiles, etc. etc.
  84  */
  85 struct rtc_time {
  86         int tm_sec;
  87         int tm_min;
  88         int tm_hour;
  89         int tm_mday;
  90         int tm_mon;
  91         int tm_year;
  92         int tm_wday;
  93         int tm_yday;
  94         int tm_isdst;
  95 };
  96
  97 /* ioctl() calls that are permitted to the /dev/rtc interface. */
  98 #define RTC_MAGIC 'p'
  99 #define RTC_RD_TIME             _IOR(RTC_MAGIC, 0x09, struct rtc_time)  /* Read RTC time. */
 100 #define RTC_SET_TIME            _IOW(RTC_MAGIC, 0x0a, struct rtc_time)  /* Set RTC time. */
 101 #define RTC_SET_CHARGE          _IOW(RTC_MAGIC, 0x0b, int)
 102 #define RTC_VLOW_RD     _IOR(RTC_MAGIC, 0x11, int)  /* Voltage Low detector */
 103 #define RTC_VLOW_SET    _IO(RTC_MAGIC, 0x12)        /* Clear voltage low information */
 104 #define RTC_MAX_IOCTL 0x12
 105
 106 #endif /* __RTC_H__ */