include/linux/rtc.h

   1 /*
   2  * Generic RTC interface.
   3  * This version contains the part of the user interface to the Real Time Clock
   4  * service. It is used with both the legacy mc146818 and also  EFI
   5  *
   6  * Copyright (C) 1999 Hewlett-Packard Co.
   7  * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
   8  */
   9 #ifndef _LINUX_RTC_H
  10 #define _LINUX_RTC_H_
  11
  12 /*
  13  * The struct used to pass data via the following ioctl. Similar to the
  14  * struct tm in <time.h>, but it needs to be here so that the kernel
  15  * source is self contained, allowing cross-compiles, etc. etc.
  16  */
  17
  18 struct rtc_time {
  19         int tm_sec;
  20         int tm_min;
  21         int tm_hour;
  22         int tm_mday;
  23         int tm_mon;
  24         int tm_year;
  25         int tm_wday;
  26         int tm_yday;
  27         int tm_isdst;
  28 };
  29
  30 /*
  31  * This data structure is inspired by the EFI (v0.92) wakeup
  32  * alarm API.
  33  */
  34 struct rtc_wkalrm {
  35         unsigned char enabled;  /* 0 = alarm disable, 1 = alarm disabled */
  36         unsigned char pending;  /* 0 = alarm pending, 1 = alarm not pending */
  37         struct rtc_time time;   /* time the alarm is set to */
  38 };
  39
  40
  41 /*
  42  * ioctl calls that are permitted to the /dev/rtc interface, if
  43  * CONFIG_RTC/CONFIG_EFI_RTC was enabled.
  44  */
  45
  46 #define RTC_AIE_ON      _IO('p', 0x01)  /* Alarm int. enable on         */
  47 #define RTC_AIE_OFF     _IO('p', 0x02)  /* ... off                      */
  48 #define RTC_UIE_ON      _IO('p', 0x03)  /* Update int. enable on        */
  49 #define RTC_UIE_OFF     _IO('p', 0x04)  /* ... off                      */
  50 #define RTC_PIE_ON      _IO('p', 0x05)  /* Periodic int. enable on      */
  51 #define RTC_PIE_OFF     _IO('p', 0x06)  /* ... off                      */
  52 #define RTC_WIE_ON      _IO('p', 0x0f)  /* Watchdog int. enable on      */
  53 #define RTC_WIE_OFF     _IO('p', 0x10)  /* ... off                      */
  54
  55 #define RTC_ALM_SET     _IOW('p', 0x07, struct rtc_time) /* Set alarm time  */
  56 #define RTC_ALM_READ    _IOR('p', 0x08, struct rtc_time) /* Read alarm time */
  57 #define RTC_RD_TIME     _IOR('p', 0x09, struct rtc_time) /* Read RTC time   */
  58 #define RTC_SET_TIME    _IOW('p', 0x0a, struct rtc_time) /* Set RTC time    */
  59 #define RTC_IRQP_READ   _IOR('p', 0x0b, unsigned long)   /* Read IRQ rate   */
  60 #define RTC_IRQP_SET    _IOW('p', 0x0c, unsigned long)   /* Set IRQ rate    */
  61 #define RTC_EPOCH_READ  _IOR('p', 0x0d, unsigned long)   /* Read epoch      */
  62 #define RTC_EPOCH_SET   _IOW('p', 0x0e, unsigned long)   /* Set epoch       */
  63
  64 #define RTC_WKALM_SET   _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/
  65 #define RTC_WKALM_RD    _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/
  66
  67 #endif /* _LINUX_RTC_H_ */