arch/m32r/include/asm/rtc.h

   1 #ifndef __RTC_H__
   2 #define __RTC_H__
   3
   4    /* Dallas DS1302 clock/calendar register numbers. */
   5 #  define RTC_SECONDS      0
   6 #  define RTC_MINUTES      1
   7 #  define RTC_HOURS        2
   8 #  define RTC_DAY_OF_MONTH 3
   9 #  define RTC_MONTH        4
  10 #  define RTC_WEEKDAY      5
  11 #  define RTC_YEAR         6
  12 #  define RTC_CONTROL      7
  13
  14    /* Bits in CONTROL register. */
  15 #  define RTC_CONTROL_WRITEPROTECT      0x80
  16 #  define RTC_TRICKLECHARGER            8
  17
  18   /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
  19 #  define RTC_TCR_PATTERN       0xA0    /* 1010xxxx */
  20 #  define RTC_TCR_1DIOD         0x04    /* xxxx01xx */
  21 #  define RTC_TCR_2DIOD         0x08    /* xxxx10xx */
  22 #  define RTC_TCR_DISABLED      0x00    /* xxxxxx00 Disabled */
  23 #  define RTC_TCR_2KOHM         0x01    /* xxxxxx01 2KOhm */
  24 #  define RTC_TCR_4KOHM         0x02    /* xxxxxx10 4kOhm */
  25 #  define RTC_TCR_8KOHM         0x03    /* xxxxxx11 8kOhm */
  26
  27 #ifdef CONFIG_DS1302
  28 extern unsigned char ds1302_readreg(int reg);
  29 extern void ds1302_writereg(int reg, unsigned char val);
  30 extern int ds1302_init(void);
  31 #  define CMOS_READ(x) ds1302_readreg(x)
  32 #  define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
  33 #  define RTC_INIT() ds1302_init()
  34 #else
  35   /* No RTC configured so we shouldn't try to access any. */
  36 #  define CMOS_READ(x) 42
  37 #  define CMOS_WRITE(x,y)
  38 #  define RTC_INIT() (-1)
  39 #endif
  40
  41 /*
  42  * The struct used to pass data via the following ioctl. Similar to the
  43  * struct tm in <time.h>, but it needs to be here so that the kernel
  44  * source is self contained, allowing cross-compiles, etc. etc.
  45  */
  46 struct rtc_time {
  47         int tm_sec;
  48         int tm_min;
  49         int tm_hour;
  50         int tm_mday;
  51         int tm_mon;
  52         int tm_year;
  53         int tm_wday;
  54         int tm_yday;
  55         int tm_isdst;
  56 };
  57
  58 /* ioctl() calls that are permitted to the /dev/rtc interface. */
  59 #define RTC_MAGIC 'p'
  60 #define RTC_RD_TIME             _IOR(RTC_MAGIC, 0x09, struct rtc_time)  /* Read RTC time. */
  61 #define RTC_SET_TIME            _IOW(RTC_MAGIC, 0x0a, struct rtc_time)  /* Set RTC time. */
  62 #define RTC_SET_CHARGE          _IOW(RTC_MAGIC, 0x0b, int)
  63 #define RTC_MAX_IOCTL 0x0b
  64
  65 #endif /* __RTC_H__ */