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1da177e4 LT |
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 | * Data structure to control PLL correction some better RTC feature | |
44 | * pll_value is used to get or set current value of correction, | |
45 | * the rest of the struct is used to query HW capabilities. | |
46 | * This is modeled after the RTC used in Q40/Q60 computers but | |
47 | * should be sufficiently flexible for other devices | |
48 | * | |
49 | * +ve pll_value means clock will run faster by | |
50 | * pll_value*pll_posmult/pll_clock | |
51 | * -ve pll_value means clock will run slower by | |
52 | * pll_value*pll_negmult/pll_clock | |
53 | */ | |
54 | ||
55 | struct rtc_pll_info { | |
56 | int pll_ctrl; /* placeholder for fancier control */ | |
57 | int pll_value; /* get/set correction value */ | |
58 | int pll_max; /* max +ve (faster) adjustment value */ | |
59 | int pll_min; /* max -ve (slower) adjustment value */ | |
60 | int pll_posmult; /* factor for +ve correction */ | |
61 | int pll_negmult; /* factor for -ve correction */ | |
62 | long pll_clock; /* base PLL frequency */ | |
63 | }; | |
64 | ||
65 | /* | |
66 | * ioctl calls that are permitted to the /dev/rtc interface, if | |
67 | * any of the RTC drivers are enabled. | |
68 | */ | |
69 | ||
70 | #define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */ | |
71 | #define RTC_AIE_OFF _IO('p', 0x02) /* ... off */ | |
72 | #define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */ | |
73 | #define RTC_UIE_OFF _IO('p', 0x04) /* ... off */ | |
74 | #define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */ | |
75 | #define RTC_PIE_OFF _IO('p', 0x06) /* ... off */ | |
76 | #define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */ | |
77 | #define RTC_WIE_OFF _IO('p', 0x10) /* ... off */ | |
78 | ||
79 | #define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */ | |
80 | #define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */ | |
81 | #define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */ | |
82 | #define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */ | |
83 | #define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */ | |
84 | #define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */ | |
85 | #define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */ | |
86 | #define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */ | |
87 | ||
88 | #define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/ | |
89 | #define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/ | |
90 | ||
91 | #define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */ | |
92 | #define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */ | |
93 | ||
94 | #ifdef __KERNEL__ | |
95 | ||
96 | typedef struct rtc_task { | |
97 | void (*func)(void *private_data); | |
98 | void *private_data; | |
99 | } rtc_task_t; | |
100 | ||
101 | int rtc_register(rtc_task_t *task); | |
102 | int rtc_unregister(rtc_task_t *task); | |
103 | int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg); | |
104 | void rtc_get_rtc_time(struct rtc_time *rtc_tm); | |
105 | ||
106 | #endif /* __KERNEL__ */ | |
107 | ||
108 | #endif /* _LINUX_RTC_H_ */ |