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 * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out 6 * from <linux/mc146818rtc.h> to this file for 2.4 kernels. 7 * 8 * Copyright (C) 1999 Hewlett-Packard Co. 9 * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com> 10 */ 11#ifndef _LINUX_RTC_H_ 12#define _LINUX_RTC_H_ 13 14/* 15 * The struct used to pass data via the following ioctl. Similar to the 16 * struct tm in <time.h>, but it needs to be here so that the kernel 17 * source is self contained, allowing cross-compiles, etc. etc. 18 */ 19 20struct rtc_time { 21 int tm_sec; 22 int tm_min; 23 int tm_hour; 24 int tm_mday; 25 int tm_mon; 26 int tm_year; 27 int tm_wday; 28 int tm_yday; 29 int tm_isdst; 30}; 31 32/* 33 * This data structure is inspired by the EFI (v0.92) wakeup 34 * alarm API. 35 */ 36struct rtc_wkalrm { 37 unsigned char enabled; /* 0 = alarm disable, 1 = alarm disabled */ 38 unsigned char pending; /* 0 = alarm pending, 1 = alarm not pending */ 39 struct rtc_time time; /* time the alarm is set to */ 40}; 41 42 43/* 44 * ioctl calls that are permitted to the /dev/rtc interface, if 45 * CONFIG_RTC/CONFIG_EFI_RTC was enabled. 46 */ 47 48#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */ 49#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */ 50#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */ 51#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */ 52#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */ 53#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */ 54#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */ 55#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */ 56 57#define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */ 58#define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */ 59#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */ 60#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */ 61#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */ 62#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */ 63#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */ 64#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */ 65 66#define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/ 67#define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/ 68 69#endif /* _LINUX_RTC_H_ */ 70