Root/
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 | #include <linux/types.h> |
16 | #include <linux/interrupt.h> |
17 | #include <uapi/linux/rtc.h> |
18 | |
19 | extern int rtc_month_days(unsigned int month, unsigned int year); |
20 | extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year); |
21 | extern int rtc_valid_tm(struct rtc_time *tm); |
22 | extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time); |
23 | extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm); |
24 | ktime_t rtc_tm_to_ktime(struct rtc_time tm); |
25 | struct rtc_time rtc_ktime_to_tm(ktime_t kt); |
26 | |
27 | |
28 | #include <linux/device.h> |
29 | #include <linux/seq_file.h> |
30 | #include <linux/cdev.h> |
31 | #include <linux/poll.h> |
32 | #include <linux/mutex.h> |
33 | #include <linux/timerqueue.h> |
34 | #include <linux/workqueue.h> |
35 | |
36 | extern struct class *rtc_class; |
37 | |
38 | /* |
39 | * For these RTC methods the device parameter is the physical device |
40 | * on whatever bus holds the hardware (I2C, Platform, SPI, etc), which |
41 | * was passed to rtc_device_register(). Its driver_data normally holds |
42 | * device state, including the rtc_device pointer for the RTC. |
43 | * |
44 | * Most of these methods are called with rtc_device.ops_lock held, |
45 | * through the rtc_*(struct rtc_device *, ...) calls. |
46 | * |
47 | * The (current) exceptions are mostly filesystem hooks: |
48 | * - the proc() hook for procfs |
49 | * - non-ioctl() chardev hooks: open(), release(), read_callback() |
50 | * |
51 | * REVISIT those periodic irq calls *do* have ops_lock when they're |
52 | * issued through ioctl() ... |
53 | */ |
54 | struct rtc_class_ops { |
55 | int (*open)(struct device *); |
56 | void (*release)(struct device *); |
57 | int (*ioctl)(struct device *, unsigned int, unsigned long); |
58 | int (*read_time)(struct device *, struct rtc_time *); |
59 | int (*set_time)(struct device *, struct rtc_time *); |
60 | int (*read_alarm)(struct device *, struct rtc_wkalrm *); |
61 | int (*set_alarm)(struct device *, struct rtc_wkalrm *); |
62 | int (*proc)(struct device *, struct seq_file *); |
63 | int (*set_mmss)(struct device *, unsigned long secs); |
64 | int (*read_callback)(struct device *, int data); |
65 | int (*alarm_irq_enable)(struct device *, unsigned int enabled); |
66 | }; |
67 | |
68 | #define RTC_DEVICE_NAME_SIZE 20 |
69 | typedef struct rtc_task { |
70 | void (*func)(void *private_data); |
71 | void *private_data; |
72 | } rtc_task_t; |
73 | |
74 | |
75 | struct rtc_timer { |
76 | struct rtc_task task; |
77 | struct timerqueue_node node; |
78 | ktime_t period; |
79 | int enabled; |
80 | }; |
81 | |
82 | |
83 | /* flags */ |
84 | #define RTC_DEV_BUSY 0 |
85 | |
86 | struct rtc_device |
87 | { |
88 | struct device dev; |
89 | struct module *owner; |
90 | |
91 | int id; |
92 | char name[RTC_DEVICE_NAME_SIZE]; |
93 | |
94 | const struct rtc_class_ops *ops; |
95 | struct mutex ops_lock; |
96 | |
97 | struct cdev char_dev; |
98 | unsigned long flags; |
99 | |
100 | unsigned long irq_data; |
101 | spinlock_t irq_lock; |
102 | wait_queue_head_t irq_queue; |
103 | struct fasync_struct *async_queue; |
104 | |
105 | struct rtc_task *irq_task; |
106 | spinlock_t irq_task_lock; |
107 | int irq_freq; |
108 | int max_user_freq; |
109 | |
110 | struct timerqueue_head timerqueue; |
111 | struct rtc_timer aie_timer; |
112 | struct rtc_timer uie_rtctimer; |
113 | struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */ |
114 | int pie_enabled; |
115 | struct work_struct irqwork; |
116 | /* Some hardware can't support UIE mode */ |
117 | int uie_unsupported; |
118 | |
119 | #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL |
120 | struct work_struct uie_task; |
121 | struct timer_list uie_timer; |
122 | /* Those fields are protected by rtc->irq_lock */ |
123 | unsigned int oldsecs; |
124 | unsigned int uie_irq_active:1; |
125 | unsigned int stop_uie_polling:1; |
126 | unsigned int uie_task_active:1; |
127 | unsigned int uie_timer_active:1; |
128 | #endif |
129 | }; |
130 | #define to_rtc_device(d) container_of(d, struct rtc_device, dev) |
131 | |
132 | extern struct rtc_device *rtc_device_register(const char *name, |
133 | struct device *dev, |
134 | const struct rtc_class_ops *ops, |
135 | struct module *owner); |
136 | extern struct rtc_device *devm_rtc_device_register(struct device *dev, |
137 | const char *name, |
138 | const struct rtc_class_ops *ops, |
139 | struct module *owner); |
140 | extern void rtc_device_unregister(struct rtc_device *rtc); |
141 | extern void devm_rtc_device_unregister(struct device *dev, |
142 | struct rtc_device *rtc); |
143 | |
144 | extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm); |
145 | extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm); |
146 | extern int rtc_set_mmss(struct rtc_device *rtc, unsigned long secs); |
147 | extern int rtc_set_ntp_time(struct timespec now); |
148 | int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm); |
149 | extern int rtc_read_alarm(struct rtc_device *rtc, |
150 | struct rtc_wkalrm *alrm); |
151 | extern int rtc_set_alarm(struct rtc_device *rtc, |
152 | struct rtc_wkalrm *alrm); |
153 | extern int rtc_initialize_alarm(struct rtc_device *rtc, |
154 | struct rtc_wkalrm *alrm); |
155 | extern void rtc_update_irq(struct rtc_device *rtc, |
156 | unsigned long num, unsigned long events); |
157 | |
158 | extern struct rtc_device *rtc_class_open(const char *name); |
159 | extern void rtc_class_close(struct rtc_device *rtc); |
160 | |
161 | extern int rtc_irq_register(struct rtc_device *rtc, |
162 | struct rtc_task *task); |
163 | extern void rtc_irq_unregister(struct rtc_device *rtc, |
164 | struct rtc_task *task); |
165 | extern int rtc_irq_set_state(struct rtc_device *rtc, |
166 | struct rtc_task *task, int enabled); |
167 | extern int rtc_irq_set_freq(struct rtc_device *rtc, |
168 | struct rtc_task *task, int freq); |
169 | extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled); |
170 | extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled); |
171 | extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, |
172 | unsigned int enabled); |
173 | |
174 | void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode); |
175 | void rtc_aie_update_irq(void *private); |
176 | void rtc_uie_update_irq(void *private); |
177 | enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer); |
178 | |
179 | int rtc_register(rtc_task_t *task); |
180 | int rtc_unregister(rtc_task_t *task); |
181 | int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg); |
182 | |
183 | void rtc_timer_init(struct rtc_timer *timer, void (*f)(void* p), void* data); |
184 | int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer* timer, |
185 | ktime_t expires, ktime_t period); |
186 | int rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer* timer); |
187 | void rtc_timer_do_work(struct work_struct *work); |
188 | |
189 | static inline bool is_leap_year(unsigned int year) |
190 | { |
191 | return (!(year % 4) && (year % 100)) || !(year % 400); |
192 | } |
193 | |
194 | #ifdef CONFIG_RTC_HCTOSYS_DEVICE |
195 | extern int rtc_hctosys_ret; |
196 | #else |
197 | #define rtc_hctosys_ret -ENODEV |
198 | #endif |
199 | |
200 | #endif /* _LINUX_RTC_H_ */ |
201 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9