250 строки
8.3 KiB
C
250 строки
8.3 KiB
C
/*
|
|
* 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_
|
|
|
|
/*
|
|
* The struct used to pass data via the following ioctl. Similar to the
|
|
* struct tm in <time.h>, but it needs to be here so that the kernel
|
|
* source is self contained, allowing cross-compiles, etc. etc.
|
|
*/
|
|
|
|
struct rtc_time {
|
|
int tm_sec;
|
|
int tm_min;
|
|
int tm_hour;
|
|
int tm_mday;
|
|
int tm_mon;
|
|
int tm_year;
|
|
int tm_wday;
|
|
int tm_yday;
|
|
int tm_isdst;
|
|
};
|
|
|
|
/*
|
|
* This data structure is inspired by the EFI (v0.92) wakeup
|
|
* alarm API.
|
|
*/
|
|
struct rtc_wkalrm {
|
|
unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */
|
|
unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */
|
|
struct rtc_time time; /* time the alarm is set to */
|
|
};
|
|
|
|
/*
|
|
* Data structure to control PLL correction some better RTC feature
|
|
* pll_value is used to get or set current value of correction,
|
|
* the rest of the struct is used to query HW capabilities.
|
|
* This is modeled after the RTC used in Q40/Q60 computers but
|
|
* should be sufficiently flexible for other devices
|
|
*
|
|
* +ve pll_value means clock will run faster by
|
|
* pll_value*pll_posmult/pll_clock
|
|
* -ve pll_value means clock will run slower by
|
|
* pll_value*pll_negmult/pll_clock
|
|
*/
|
|
|
|
struct rtc_pll_info {
|
|
int pll_ctrl; /* placeholder for fancier control */
|
|
int pll_value; /* get/set correction value */
|
|
int pll_max; /* max +ve (faster) adjustment value */
|
|
int pll_min; /* max -ve (slower) adjustment value */
|
|
int pll_posmult; /* factor for +ve correction */
|
|
int pll_negmult; /* factor for -ve correction */
|
|
long pll_clock; /* base PLL frequency */
|
|
};
|
|
|
|
/*
|
|
* ioctl calls that are permitted to the /dev/rtc interface, if
|
|
* any of the RTC drivers are enabled.
|
|
*/
|
|
|
|
#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */
|
|
#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */
|
|
#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
|
|
#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
|
|
#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */
|
|
#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */
|
|
#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */
|
|
#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */
|
|
|
|
#define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */
|
|
#define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */
|
|
#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */
|
|
#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */
|
|
#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */
|
|
#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */
|
|
#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */
|
|
#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */
|
|
|
|
#define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/
|
|
#define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/
|
|
|
|
#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
|
|
#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
|
|
|
|
/* interrupt flags */
|
|
#define RTC_IRQF 0x80 /* any of the following is active */
|
|
#define RTC_PF 0x40
|
|
#define RTC_AF 0x20
|
|
#define RTC_UF 0x10
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.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);
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/mutex.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()
|
|
* - periodic irq calls: irq_set_state(), irq_set_freq()
|
|
*
|
|
* 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 (*irq_set_state)(struct device *, int enabled);
|
|
int (*irq_set_freq)(struct device *, int freq);
|
|
int (*read_callback)(struct device *, int data);
|
|
int (*alarm_irq_enable)(struct device *, unsigned int enabled);
|
|
int (*update_irq_enable)(struct device *, unsigned int enabled);
|
|
};
|
|
|
|
#define RTC_DEVICE_NAME_SIZE 20
|
|
struct rtc_task;
|
|
|
|
/* 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;
|
|
#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 void rtc_device_unregister(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_read_alarm(struct rtc_device *rtc,
|
|
struct rtc_wkalrm *alrm);
|
|
extern int rtc_set_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(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);
|
|
|
|
typedef struct rtc_task {
|
|
void (*func)(void *private_data);
|
|
void *private_data;
|
|
} rtc_task_t;
|
|
|
|
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);
|
|
|
|
static inline bool is_leap_year(unsigned int year)
|
|
{
|
|
return (!(year % 4) && (year % 100)) || !(year % 400);
|
|
}
|
|
|
|
#ifdef CONFIG_RTC_HCTOSYS
|
|
extern int rtc_hctosys_ret;
|
|
#else
|
|
#define rtc_hctosys_ret -ENODEV
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_RTC_H_ */
|