~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/rtc.h

Version: ~ [ linux-5.2-rc1 ] ~ [ linux-5.1.2 ] ~ [ linux-5.0.16 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.43 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.119 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.176 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.179 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.139 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.67 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 time64_t rtc_tm_to_time64(struct rtc_time *tm);
 23 extern void rtc_time64_to_tm(time64_t 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  * rtc_tm_sub - Return the difference in seconds.
 29  */
 30 static inline time64_t rtc_tm_sub(struct rtc_time *lhs, struct rtc_time *rhs)
 31 {
 32         return rtc_tm_to_time64(lhs) - rtc_tm_to_time64(rhs);
 33 }
 34 
 35 /**
 36  * Deprecated. Use rtc_time64_to_tm().
 37  */
 38 static inline void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
 39 {
 40         rtc_time64_to_tm(time, tm);
 41 }
 42 
 43 /**
 44  * Deprecated. Use rtc_tm_to_time64().
 45  */
 46 static inline int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
 47 {
 48         *time = rtc_tm_to_time64(tm);
 49 
 50         return 0;
 51 }
 52 
 53 #include <linux/device.h>
 54 #include <linux/seq_file.h>
 55 #include <linux/cdev.h>
 56 #include <linux/poll.h>
 57 #include <linux/mutex.h>
 58 #include <linux/timerqueue.h>
 59 #include <linux/workqueue.h>
 60 
 61 extern struct class *rtc_class;
 62 
 63 /*
 64  * For these RTC methods the device parameter is the physical device
 65  * on whatever bus holds the hardware (I2C, Platform, SPI, etc), which
 66  * was passed to rtc_device_register().  Its driver_data normally holds
 67  * device state, including the rtc_device pointer for the RTC.
 68  *
 69  * Most of these methods are called with rtc_device.ops_lock held,
 70  * through the rtc_*(struct rtc_device *, ...) calls.
 71  *
 72  * The (current) exceptions are mostly filesystem hooks:
 73  *   - the proc() hook for procfs
 74  *   - non-ioctl() chardev hooks:  open(), release(), read_callback()
 75  *
 76  * REVISIT those periodic irq calls *do* have ops_lock when they're
 77  * issued through ioctl() ...
 78  */
 79 struct rtc_class_ops {
 80         int (*open)(struct device *);
 81         void (*release)(struct device *);
 82         int (*ioctl)(struct device *, unsigned int, unsigned long);
 83         int (*read_time)(struct device *, struct rtc_time *);
 84         int (*set_time)(struct device *, struct rtc_time *);
 85         int (*read_alarm)(struct device *, struct rtc_wkalrm *);
 86         int (*set_alarm)(struct device *, struct rtc_wkalrm *);
 87         int (*proc)(struct device *, struct seq_file *);
 88         int (*set_mmss64)(struct device *, time64_t secs);
 89         int (*set_mmss)(struct device *, unsigned long secs);
 90         int (*read_callback)(struct device *, int data);
 91         int (*alarm_irq_enable)(struct device *, unsigned int enabled);
 92         int (*read_offset)(struct device *, long *offset);
 93         int (*set_offset)(struct device *, long offset);
 94 };
 95 
 96 #define RTC_DEVICE_NAME_SIZE 20
 97 typedef struct rtc_task {
 98         void (*func)(void *private_data);
 99         void *private_data;
100 } rtc_task_t;
101 
102 
103 struct rtc_timer {
104         struct rtc_task task;
105         struct timerqueue_node node;
106         ktime_t period;
107         int enabled;
108 };
109 
110 
111 /* flags */
112 #define RTC_DEV_BUSY 0
113 
114 struct rtc_device {
115         struct device dev;
116         struct module *owner;
117 
118         int id;
119         char name[RTC_DEVICE_NAME_SIZE];
120 
121         const struct rtc_class_ops *ops;
122         struct mutex ops_lock;
123 
124         struct cdev char_dev;
125         unsigned long flags;
126 
127         unsigned long irq_data;
128         spinlock_t irq_lock;
129         wait_queue_head_t irq_queue;
130         struct fasync_struct *async_queue;
131 
132         struct rtc_task *irq_task;
133         spinlock_t irq_task_lock;
134         int irq_freq;
135         int max_user_freq;
136 
137         struct timerqueue_head timerqueue;
138         struct rtc_timer aie_timer;
139         struct rtc_timer uie_rtctimer;
140         struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */
141         int pie_enabled;
142         struct work_struct irqwork;
143         /* Some hardware can't support UIE mode */
144         int uie_unsupported;
145 
146 #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
147         struct work_struct uie_task;
148         struct timer_list uie_timer;
149         /* Those fields are protected by rtc->irq_lock */
150         unsigned int oldsecs;
151         unsigned int uie_irq_active:1;
152         unsigned int stop_uie_polling:1;
153         unsigned int uie_task_active:1;
154         unsigned int uie_timer_active:1;
155 #endif
156 };
157 #define to_rtc_device(d) container_of(d, struct rtc_device, dev)
158 
159 extern struct rtc_device *rtc_device_register(const char *name,
160                                         struct device *dev,
161                                         const struct rtc_class_ops *ops,
162                                         struct module *owner);
163 extern struct rtc_device *devm_rtc_device_register(struct device *dev,
164                                         const char *name,
165                                         const struct rtc_class_ops *ops,
166                                         struct module *owner);
167 extern void rtc_device_unregister(struct rtc_device *rtc);
168 extern void devm_rtc_device_unregister(struct device *dev,
169                                         struct rtc_device *rtc);
170 
171 extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm);
172 extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm);
173 extern int rtc_set_ntp_time(struct timespec64 now);
174 int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm);
175 extern int rtc_read_alarm(struct rtc_device *rtc,
176                         struct rtc_wkalrm *alrm);
177 extern int rtc_set_alarm(struct rtc_device *rtc,
178                                 struct rtc_wkalrm *alrm);
179 extern int rtc_initialize_alarm(struct rtc_device *rtc,
180                                 struct rtc_wkalrm *alrm);
181 extern void rtc_update_irq(struct rtc_device *rtc,
182                         unsigned long num, unsigned long events);
183 
184 extern struct rtc_device *rtc_class_open(const char *name);
185 extern void rtc_class_close(struct rtc_device *rtc);
186 
187 extern int rtc_irq_register(struct rtc_device *rtc,
188                                 struct rtc_task *task);
189 extern void rtc_irq_unregister(struct rtc_device *rtc,
190                                 struct rtc_task *task);
191 extern int rtc_irq_set_state(struct rtc_device *rtc,
192                                 struct rtc_task *task, int enabled);
193 extern int rtc_irq_set_freq(struct rtc_device *rtc,
194                                 struct rtc_task *task, int freq);
195 extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled);
196 extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled);
197 extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc,
198                                                 unsigned int enabled);
199 
200 void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode);
201 void rtc_aie_update_irq(void *private);
202 void rtc_uie_update_irq(void *private);
203 enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer);
204 
205 int rtc_register(rtc_task_t *task);
206 int rtc_unregister(rtc_task_t *task);
207 int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg);
208 
209 void rtc_timer_init(struct rtc_timer *timer, void (*f)(void *p), void *data);
210 int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,
211                     ktime_t expires, ktime_t period);
212 void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer);
213 int rtc_read_offset(struct rtc_device *rtc, long *offset);
214 int rtc_set_offset(struct rtc_device *rtc, long offset);
215 void rtc_timer_do_work(struct work_struct *work);
216 
217 static inline bool is_leap_year(unsigned int year)
218 {
219         return (!(year % 4) && (year % 100)) || !(year % 400);
220 }
221 
222 #ifdef CONFIG_RTC_HCTOSYS_DEVICE
223 extern int rtc_hctosys_ret;
224 #else
225 #define rtc_hctosys_ret -ENODEV
226 #endif
227 
228 #endif /* _LINUX_RTC_H_ */
229 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp