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