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
  57 extern unsigned char ds1302_readreg(int reg);
  58 extern void ds1302_writereg(int reg, unsigned char val);
  59 extern 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)
  64 extern unsigned char pcf8563_readreg(int reg);
  65 extern void pcf8563_writereg(int reg, unsigned char val);
  66 extern 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  */
  82 struct 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__ */