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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 { | |
304228e2 AV |
37 | unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */ |
38 | unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */ | |
1da177e4 LT |
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 | ||
0c86edc0 AZ |
94 | /* interrupt flags */ |
95 | #define RTC_IRQF 0x80 /* any of the following is active */ | |
96 | #define RTC_PF 0x40 | |
97 | #define RTC_AF 0x20 | |
98 | #define RTC_UF 0x10 | |
99 | ||
1da177e4 LT |
100 | #ifdef __KERNEL__ |
101 | ||
4024ce5e JK |
102 | #include <linux/interrupt.h> |
103 | ||
c58411e9 | 104 | extern int rtc_month_days(unsigned int month, unsigned int year); |
8232212e | 105 | extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year); |
c58411e9 AZ |
106 | extern int rtc_valid_tm(struct rtc_time *tm); |
107 | extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time); | |
108 | extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm); | |
109 | ||
0c86edc0 AZ |
110 | #include <linux/device.h> |
111 | #include <linux/seq_file.h> | |
112 | #include <linux/cdev.h> | |
113 | #include <linux/poll.h> | |
114 | #include <linux/mutex.h> | |
115 | ||
116 | extern struct class *rtc_class; | |
117 | ||
118 | struct rtc_class_ops { | |
119 | int (*open)(struct device *); | |
120 | void (*release)(struct device *); | |
121 | int (*ioctl)(struct device *, unsigned int, unsigned long); | |
122 | int (*read_time)(struct device *, struct rtc_time *); | |
123 | int (*set_time)(struct device *, struct rtc_time *); | |
124 | int (*read_alarm)(struct device *, struct rtc_wkalrm *); | |
125 | int (*set_alarm)(struct device *, struct rtc_wkalrm *); | |
126 | int (*proc)(struct device *, struct seq_file *); | |
127 | int (*set_mmss)(struct device *, unsigned long secs); | |
128 | int (*irq_set_state)(struct device *, int enabled); | |
129 | int (*irq_set_freq)(struct device *, int freq); | |
130 | int (*read_callback)(struct device *, int data); | |
131 | }; | |
132 | ||
133 | #define RTC_DEVICE_NAME_SIZE 20 | |
134 | struct rtc_task; | |
135 | ||
136 | struct rtc_device | |
137 | { | |
138 | struct class_device class_dev; | |
139 | struct module *owner; | |
140 | ||
141 | int id; | |
142 | char name[RTC_DEVICE_NAME_SIZE]; | |
143 | ||
ff8371ac | 144 | const struct rtc_class_ops *ops; |
0c86edc0 AZ |
145 | struct mutex ops_lock; |
146 | ||
147 | struct class_device *rtc_dev; | |
148 | struct cdev char_dev; | |
149 | struct mutex char_lock; | |
150 | ||
151 | unsigned long irq_data; | |
152 | spinlock_t irq_lock; | |
153 | wait_queue_head_t irq_queue; | |
154 | struct fasync_struct *async_queue; | |
155 | ||
156 | struct rtc_task *irq_task; | |
157 | spinlock_t irq_task_lock; | |
158 | int irq_freq; | |
110d693d | 159 | int max_user_freq; |
655066c3 AN |
160 | #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL |
161 | struct work_struct uie_task; | |
162 | struct timer_list uie_timer; | |
163 | /* Those fields are protected by rtc->irq_lock */ | |
164 | unsigned int oldsecs; | |
165 | unsigned int irq_active:1; | |
166 | unsigned int stop_uie_polling:1; | |
167 | unsigned int uie_task_active:1; | |
168 | unsigned int uie_timer_active:1; | |
169 | #endif | |
0c86edc0 AZ |
170 | }; |
171 | #define to_rtc_device(d) container_of(d, struct rtc_device, class_dev) | |
172 | ||
173 | extern struct rtc_device *rtc_device_register(const char *name, | |
174 | struct device *dev, | |
ff8371ac | 175 | const struct rtc_class_ops *ops, |
0c86edc0 AZ |
176 | struct module *owner); |
177 | extern void rtc_device_unregister(struct rtc_device *rdev); | |
178 | extern int rtc_interface_register(struct class_interface *intf); | |
179 | ||
180 | extern int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm); | |
181 | extern int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm); | |
182 | extern int rtc_set_mmss(struct class_device *class_dev, unsigned long secs); | |
183 | extern int rtc_read_alarm(struct class_device *class_dev, | |
184 | struct rtc_wkalrm *alrm); | |
185 | extern int rtc_set_alarm(struct class_device *class_dev, | |
186 | struct rtc_wkalrm *alrm); | |
187 | extern void rtc_update_irq(struct class_device *class_dev, | |
188 | unsigned long num, unsigned long events); | |
189 | ||
190 | extern struct class_device *rtc_class_open(char *name); | |
191 | extern void rtc_class_close(struct class_device *class_dev); | |
192 | ||
193 | extern int rtc_irq_register(struct class_device *class_dev, | |
194 | struct rtc_task *task); | |
195 | extern void rtc_irq_unregister(struct class_device *class_dev, | |
196 | struct rtc_task *task); | |
197 | extern int rtc_irq_set_state(struct class_device *class_dev, | |
198 | struct rtc_task *task, int enabled); | |
199 | extern int rtc_irq_set_freq(struct class_device *class_dev, | |
200 | struct rtc_task *task, int freq); | |
201 | ||
1da177e4 LT |
202 | typedef struct rtc_task { |
203 | void (*func)(void *private_data); | |
204 | void *private_data; | |
205 | } rtc_task_t; | |
206 | ||
207 | int rtc_register(rtc_task_t *task); | |
208 | int rtc_unregister(rtc_task_t *task); | |
209 | int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg); | |
210 | void rtc_get_rtc_time(struct rtc_time *rtc_tm); | |
2a10e0b2 | 211 | irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs); |
1da177e4 LT |
212 | |
213 | #endif /* __KERNEL__ */ | |
214 | ||
215 | #endif /* _LINUX_RTC_H_ */ |