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
20 struct 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 */
36 struct 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
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