LXR linux/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
  28extern unsigned char ds1302_readreg(int reg);
  29extern void ds1302_writereg(int reg, unsigned char val);
  30extern 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 */
  46struct 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__ */
  66