| /* |
| * 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/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 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 *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); |
| |
| 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_ */ |