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- /*
- * 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 */
- #define RTC_SET_RESOLUTION _IOW('p', 0x13, unsigned long) /* Set Timer resolution */
- #define RTC_GET_RESOLUTION _IOR('p', 0x14, unsigned long) /* Set Timer resolution */
- /* 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/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);
- extern void rtc_merge_alarm(struct rtc_time *now, struct rtc_time *alarm);
- #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;
- 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);
- };
- #define RTC_DEVICE_NAME_SIZE 20
- struct rtc_task;
- struct rtc_device
- {
- struct class_device class_dev;
- struct module *owner;
- int id;
- char name[RTC_DEVICE_NAME_SIZE];
- const struct rtc_class_ops *ops;
- struct mutex ops_lock;
- struct class_device *rtc_dev;
- struct cdev char_dev;
- struct mutex char_lock;
- 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 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, class_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 *rdev);
- extern int rtc_interface_register(struct class_interface *intf);
- extern int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm);
- extern int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm);
- extern int rtc_set_mmss(struct class_device *class_dev, unsigned long secs);
- extern int rtc_read_alarm(struct class_device *class_dev,
- struct rtc_wkalrm *alrm);
- extern int rtc_set_alarm(struct class_device *class_dev,
- struct rtc_wkalrm *alrm);
- extern void rtc_update_irq(struct class_device *class_dev,
- unsigned long num, unsigned long events);
- extern struct class_device *rtc_class_open(char *name);
- extern void rtc_class_close(struct class_device *class_dev);
- extern int rtc_irq_register(struct class_device *class_dev,
- struct rtc_task *task);
- extern void rtc_irq_unregister(struct class_device *class_dev,
- struct rtc_task *task);
- extern int rtc_irq_set_state(struct class_device *class_dev,
- struct rtc_task *task, int enabled);
- extern int rtc_irq_set_freq(struct class_device *class_dev,
- struct rtc_task *task, int freq);
- 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);
- void rtc_get_rtc_time(struct rtc_time *rtc_tm);
- irqreturn_t rtc_interrupt(int irq, void *dev_id);
- #endif /* __KERNEL__ */
- #endif /* _LINUX_RTC_H_ */
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