1 files changed, 108 insertions, 0 deletions

diff --git a/include/linux/rtc.h b/include/linux/rtc.h
new file mode 100644
index 000000000000..e1aaf1fac8e0
--- /dev/null
+++ b/include/linux/rtc.h
@@ -0,0 +1,108 @@
+/*
+ * 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 disable, 1 = alarm disabled */
+        unsigned char pending;  /* 0 = alarm pending, 1 = alarm not 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 */
+
+#ifdef __KERNEL__
+
+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);
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_RTC_H_ */