| /* |
| * 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 /* Periodic interrupt */ |
| #define RTC_AF 0x20 /* Alarm interrupt */ |
| #define RTC_UF 0x10 /* Update interrupt for 1Hz RTC */ |
| |
| |
| #define RTC_MAX_FREQ 8192 |
| |
| |
| #endif /* _LINUX_RTC_H_ */ |
