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228 lines
7.1 KiB
228 lines
7.1 KiB
/* |
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* Generic RTC interface. |
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* This version contains the part of the user interface to the Real Time Clock |
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* service. It is used with both the legacy mc146818 and also EFI |
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* Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out |
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* from <linux/mc146818rtc.h> to this file for 2.4 kernels. |
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* |
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* Copyright (C) 1999 Hewlett-Packard Co. |
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* Copyright (C) 1999 Stephane Eranian <[email protected]> |
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*/ |
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#ifndef _LINUX_RTC_H_ |
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#define _LINUX_RTC_H_ |
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#include <linux/types.h> |
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#include <linux/interrupt.h> |
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#include <uapi/linux/rtc.h> |
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extern int rtc_month_days(unsigned int month, unsigned int year); |
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extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year); |
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extern int rtc_valid_tm(struct rtc_time *tm); |
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extern time64_t rtc_tm_to_time64(struct rtc_time *tm); |
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extern void rtc_time64_to_tm(time64_t time, struct rtc_time *tm); |
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ktime_t rtc_tm_to_ktime(struct rtc_time tm); |
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struct rtc_time rtc_ktime_to_tm(ktime_t kt); |
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/* |
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* rtc_tm_sub - Return the difference in seconds. |
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*/ |
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static inline time64_t rtc_tm_sub(struct rtc_time *lhs, struct rtc_time *rhs) |
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{ |
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return rtc_tm_to_time64(lhs) - rtc_tm_to_time64(rhs); |
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} |
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/** |
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* Deprecated. Use rtc_time64_to_tm(). |
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*/ |
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static inline void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) |
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{ |
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rtc_time64_to_tm(time, tm); |
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} |
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/** |
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* Deprecated. Use rtc_tm_to_time64(). |
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*/ |
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static inline int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) |
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{ |
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*time = rtc_tm_to_time64(tm); |
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return 0; |
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} |
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#include <linux/device.h> |
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#include <linux/seq_file.h> |
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#include <linux/cdev.h> |
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#include <linux/poll.h> |
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#include <linux/mutex.h> |
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#include <linux/timerqueue.h> |
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#include <linux/workqueue.h> |
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extern struct class *rtc_class; |
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/* |
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* For these RTC methods the device parameter is the physical device |
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* on whatever bus holds the hardware (I2C, Platform, SPI, etc), which |
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* was passed to rtc_device_register(). Its driver_data normally holds |
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* device state, including the rtc_device pointer for the RTC. |
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* |
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* Most of these methods are called with rtc_device.ops_lock held, |
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* through the rtc_*(struct rtc_device *, ...) calls. |
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* |
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* The (current) exceptions are mostly filesystem hooks: |
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* - the proc() hook for procfs |
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* - non-ioctl() chardev hooks: open(), release(), read_callback() |
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* |
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* REVISIT those periodic irq calls *do* have ops_lock when they're |
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* issued through ioctl() ... |
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*/ |
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struct rtc_class_ops { |
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int (*open)(struct device *); |
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void (*release)(struct device *); |
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int (*ioctl)(struct device *, unsigned int, unsigned long); |
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int (*read_time)(struct device *, struct rtc_time *); |
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int (*set_time)(struct device *, struct rtc_time *); |
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int (*read_alarm)(struct device *, struct rtc_wkalrm *); |
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int (*set_alarm)(struct device *, struct rtc_wkalrm *); |
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int (*proc)(struct device *, struct seq_file *); |
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int (*set_mmss64)(struct device *, time64_t secs); |
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int (*set_mmss)(struct device *, unsigned long secs); |
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int (*read_callback)(struct device *, int data); |
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int (*alarm_irq_enable)(struct device *, unsigned int enabled); |
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int (*read_offset)(struct device *, long *offset); |
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int (*set_offset)(struct device *, long offset); |
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}; |
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#define RTC_DEVICE_NAME_SIZE 20 |
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typedef struct rtc_task { |
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void (*func)(void *private_data); |
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void *private_data; |
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} rtc_task_t; |
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struct rtc_timer { |
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struct rtc_task task; |
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struct timerqueue_node node; |
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ktime_t period; |
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int enabled; |
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}; |
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/* flags */ |
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#define RTC_DEV_BUSY 0 |
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struct rtc_device { |
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struct device dev; |
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struct module *owner; |
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int id; |
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char name[RTC_DEVICE_NAME_SIZE]; |
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const struct rtc_class_ops *ops; |
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struct mutex ops_lock; |
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struct cdev char_dev; |
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unsigned long flags; |
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unsigned long irq_data; |
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spinlock_t irq_lock; |
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wait_queue_head_t irq_queue; |
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struct fasync_struct *async_queue; |
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struct rtc_task *irq_task; |
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spinlock_t irq_task_lock; |
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int irq_freq; |
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int max_user_freq; |
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struct timerqueue_head timerqueue; |
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struct rtc_timer aie_timer; |
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struct rtc_timer uie_rtctimer; |
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struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */ |
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int pie_enabled; |
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struct work_struct irqwork; |
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/* Some hardware can't support UIE mode */ |
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int uie_unsupported; |
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#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL |
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struct work_struct uie_task; |
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struct timer_list uie_timer; |
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/* Those fields are protected by rtc->irq_lock */ |
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unsigned int oldsecs; |
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unsigned int uie_irq_active:1; |
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unsigned int stop_uie_polling:1; |
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unsigned int uie_task_active:1; |
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unsigned int uie_timer_active:1; |
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#endif |
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}; |
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#define to_rtc_device(d) container_of(d, struct rtc_device, dev) |
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extern struct rtc_device *rtc_device_register(const char *name, |
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struct device *dev, |
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const struct rtc_class_ops *ops, |
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struct module *owner); |
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extern struct rtc_device *devm_rtc_device_register(struct device *dev, |
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const char *name, |
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const struct rtc_class_ops *ops, |
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struct module *owner); |
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extern void rtc_device_unregister(struct rtc_device *rtc); |
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extern void devm_rtc_device_unregister(struct device *dev, |
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struct rtc_device *rtc); |
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extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm); |
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extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm); |
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extern int rtc_set_ntp_time(struct timespec64 now); |
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int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm); |
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extern int rtc_read_alarm(struct rtc_device *rtc, |
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struct rtc_wkalrm *alrm); |
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extern int rtc_set_alarm(struct rtc_device *rtc, |
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struct rtc_wkalrm *alrm); |
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extern int rtc_initialize_alarm(struct rtc_device *rtc, |
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struct rtc_wkalrm *alrm); |
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extern void rtc_update_irq(struct rtc_device *rtc, |
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unsigned long num, unsigned long events); |
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extern struct rtc_device *rtc_class_open(const char *name); |
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extern void rtc_class_close(struct rtc_device *rtc); |
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extern int rtc_irq_register(struct rtc_device *rtc, |
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struct rtc_task *task); |
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extern void rtc_irq_unregister(struct rtc_device *rtc, |
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struct rtc_task *task); |
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extern int rtc_irq_set_state(struct rtc_device *rtc, |
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struct rtc_task *task, int enabled); |
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extern int rtc_irq_set_freq(struct rtc_device *rtc, |
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struct rtc_task *task, int freq); |
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extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled); |
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extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled); |
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extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, |
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unsigned int enabled); |
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void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode); |
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void rtc_aie_update_irq(void *private); |
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void rtc_uie_update_irq(void *private); |
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enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer); |
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int rtc_register(rtc_task_t *task); |
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int rtc_unregister(rtc_task_t *task); |
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int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg); |
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void rtc_timer_init(struct rtc_timer *timer, void (*f)(void *p), void *data); |
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int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer, |
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ktime_t expires, ktime_t period); |
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void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer); |
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int rtc_read_offset(struct rtc_device *rtc, long *offset); |
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int rtc_set_offset(struct rtc_device *rtc, long offset); |
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void rtc_timer_do_work(struct work_struct *work); |
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static inline bool is_leap_year(unsigned int year) |
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{ |
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return (!(year % 4) && (year % 100)) || !(year % 400); |
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} |
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#ifdef CONFIG_RTC_HCTOSYS_DEVICE |
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extern int rtc_hctosys_ret; |
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#else |
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#define rtc_hctosys_ret -ENODEV |
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#endif |
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#endif /* _LINUX_RTC_H_ */
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