201 lines
6.4 KiB
C
Executable File
201 lines
6.4 KiB
C
Executable File
/*
|
|
* Generic RTC interface.
|
|
* This version contains the part of the user interface to the Real Time Clock
|
|
* service. It is used with both the legacy mc146818 and also EFI
|
|
* Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
|
|
* from <linux/mc146818rtc.h> to this file for 2.4 kernels.
|
|
*
|
|
* Copyright (C) 1999 Hewlett-Packard Co.
|
|
* Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
|
|
*/
|
|
#ifndef _LINUX_RTC_H_
|
|
#define _LINUX_RTC_H_
|
|
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <uapi/linux/rtc.h>
|
|
|
|
extern int rtc_month_days(unsigned int month, unsigned int year);
|
|
extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year);
|
|
extern int rtc_valid_tm(struct rtc_time *tm);
|
|
extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time);
|
|
extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm);
|
|
ktime_t rtc_tm_to_ktime(struct rtc_time tm);
|
|
struct rtc_time rtc_ktime_to_tm(ktime_t kt);
|
|
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/timerqueue.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
extern struct class *rtc_class;
|
|
|
|
/*
|
|
* For these RTC methods the device parameter is the physical device
|
|
* on whatever bus holds the hardware (I2C, Platform, SPI, etc), which
|
|
* was passed to rtc_device_register(). Its driver_data normally holds
|
|
* device state, including the rtc_device pointer for the RTC.
|
|
*
|
|
* Most of these methods are called with rtc_device.ops_lock held,
|
|
* through the rtc_*(struct rtc_device *, ...) calls.
|
|
*
|
|
* The (current) exceptions are mostly filesystem hooks:
|
|
* - the proc() hook for procfs
|
|
* - non-ioctl() chardev hooks: open(), release(), read_callback()
|
|
*
|
|
* REVISIT those periodic irq calls *do* have ops_lock when they're
|
|
* issued through ioctl() ...
|
|
*/
|
|
struct rtc_class_ops {
|
|
int (*open)(struct device *);
|
|
void (*release)(struct device *);
|
|
int (*ioctl)(struct device *, unsigned int, unsigned long);
|
|
int (*read_time)(struct device *, struct rtc_time *);
|
|
int (*set_time)(struct device *, struct rtc_time *);
|
|
int (*read_alarm)(struct device *, struct rtc_wkalrm *);
|
|
int (*set_alarm)(struct device *, struct rtc_wkalrm *);
|
|
int (*proc)(struct device *, struct seq_file *);
|
|
int (*set_mmss)(struct device *, unsigned long secs);
|
|
int (*read_callback)(struct device *, int data);
|
|
int (*alarm_irq_enable)(struct device *, unsigned int enabled);
|
|
};
|
|
|
|
#define RTC_DEVICE_NAME_SIZE 20
|
|
typedef struct rtc_task {
|
|
void (*func)(void *private_data);
|
|
void *private_data;
|
|
} rtc_task_t;
|
|
|
|
|
|
struct rtc_timer {
|
|
struct rtc_task task;
|
|
struct timerqueue_node node;
|
|
ktime_t period;
|
|
int enabled;
|
|
};
|
|
|
|
|
|
/* flags */
|
|
#define RTC_DEV_BUSY 0
|
|
|
|
struct rtc_device
|
|
{
|
|
struct device dev;
|
|
struct module *owner;
|
|
|
|
int id;
|
|
char name[RTC_DEVICE_NAME_SIZE];
|
|
|
|
const struct rtc_class_ops *ops;
|
|
struct mutex ops_lock;
|
|
|
|
struct cdev char_dev;
|
|
unsigned long flags;
|
|
|
|
unsigned long irq_data;
|
|
spinlock_t irq_lock;
|
|
wait_queue_head_t irq_queue;
|
|
struct fasync_struct *async_queue;
|
|
|
|
struct rtc_task *irq_task;
|
|
spinlock_t irq_task_lock;
|
|
int irq_freq;
|
|
int max_user_freq;
|
|
|
|
struct timerqueue_head timerqueue;
|
|
struct rtc_timer aie_timer;
|
|
struct rtc_timer uie_rtctimer;
|
|
struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */
|
|
int pie_enabled;
|
|
struct work_struct irqwork;
|
|
/* Some hardware can't support UIE mode */
|
|
int uie_unsupported;
|
|
|
|
#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
|
|
struct work_struct uie_task;
|
|
struct timer_list uie_timer;
|
|
/* Those fields are protected by rtc->irq_lock */
|
|
unsigned int oldsecs;
|
|
unsigned int uie_irq_active:1;
|
|
unsigned int stop_uie_polling:1;
|
|
unsigned int uie_task_active:1;
|
|
unsigned int uie_timer_active:1;
|
|
#endif
|
|
};
|
|
#define to_rtc_device(d) container_of(d, struct rtc_device, dev)
|
|
|
|
extern struct rtc_device *rtc_device_register(const char *name,
|
|
struct device *dev,
|
|
const struct rtc_class_ops *ops,
|
|
struct module *owner);
|
|
extern struct rtc_device *devm_rtc_device_register(struct device *dev,
|
|
const char *name,
|
|
const struct rtc_class_ops *ops,
|
|
struct module *owner);
|
|
extern void rtc_device_unregister(struct rtc_device *rtc);
|
|
extern void devm_rtc_device_unregister(struct device *dev,
|
|
struct rtc_device *rtc);
|
|
|
|
extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm);
|
|
extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm);
|
|
extern int rtc_set_mmss(struct rtc_device *rtc, unsigned long secs);
|
|
extern int rtc_set_ntp_time(struct timespec now);
|
|
int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm);
|
|
extern int rtc_read_alarm(struct rtc_device *rtc,
|
|
struct rtc_wkalrm *alrm);
|
|
extern int rtc_set_alarm(struct rtc_device *rtc,
|
|
struct rtc_wkalrm *alrm);
|
|
extern int rtc_initialize_alarm(struct rtc_device *rtc,
|
|
struct rtc_wkalrm *alrm);
|
|
extern void rtc_update_irq(struct rtc_device *rtc,
|
|
unsigned long num, unsigned long events);
|
|
|
|
extern struct rtc_device *rtc_class_open(const char *name);
|
|
extern void rtc_class_close(struct rtc_device *rtc);
|
|
|
|
extern int rtc_irq_register(struct rtc_device *rtc,
|
|
struct rtc_task *task);
|
|
extern void rtc_irq_unregister(struct rtc_device *rtc,
|
|
struct rtc_task *task);
|
|
extern int rtc_irq_set_state(struct rtc_device *rtc,
|
|
struct rtc_task *task, int enabled);
|
|
extern int rtc_irq_set_freq(struct rtc_device *rtc,
|
|
struct rtc_task *task, int freq);
|
|
extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled);
|
|
extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled);
|
|
extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc,
|
|
unsigned int enabled);
|
|
|
|
void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode);
|
|
void rtc_aie_update_irq(void *private);
|
|
void rtc_uie_update_irq(void *private);
|
|
enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer);
|
|
|
|
int rtc_register(rtc_task_t *task);
|
|
int rtc_unregister(rtc_task_t *task);
|
|
int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg);
|
|
|
|
void rtc_timer_init(struct rtc_timer *timer, void (*f)(void* p), void* data);
|
|
int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer* timer,
|
|
ktime_t expires, ktime_t period);
|
|
int rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer* timer);
|
|
void rtc_timer_do_work(struct work_struct *work);
|
|
|
|
static inline bool is_leap_year(unsigned int year)
|
|
{
|
|
return (!(year % 4) && (year % 100)) || !(year % 400);
|
|
}
|
|
|
|
#ifdef CONFIG_RTC_HCTOSYS_DEVICE
|
|
extern int rtc_hctosys_ret;
|
|
#else
|
|
#define rtc_hctosys_ret -ENODEV
|
|
#endif
|
|
|
|
#endif /* _LINUX_RTC_H_ */
|