1 /* 2 * Common defines/structures/etc... for applets that need to work with the RTC. 3 * 4 * Licensed under GPLv2 or later, see file LICENSE in this source tree. 5 */ 6 7 #ifndef BB_RTC_H 8 #define BB_RTC_H 1 9 10 #include "libbb.h" 11 12 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN 13 14 #if ENABLE_FEATURE_HWCLOCK_ADJTIME_FHS 15 # define ADJTIME_PATH "/var/lib/hwclock/adjtime" 16 #else 17 # define ADJTIME_PATH "/etc/adjtime" 18 #endif 19 20 int rtc_adjtime_is_utc(void) FAST_FUNC; 21 int rtc_xopen(const char **default_rtc, int flags) FAST_FUNC; 22 void rtc_read_tm(struct tm *ptm, int fd) FAST_FUNC; 23 time_t rtc_tm2time(struct tm *ptm, int utc) FAST_FUNC; 24 25 26 /* 27 * Everything below this point has been copied from linux/rtc.h 28 * to eliminate the kernel header dependency 29 */ 30 31 struct linux_rtc_time { 32 int tm_sec; 33 int tm_min; 34 int tm_hour; 35 int tm_mday; 36 int tm_mon; 37 int tm_year; 38 int tm_wday; 39 int tm_yday; 40 int tm_isdst; 41 }; 42 43 struct linux_rtc_wkalrm { 44 unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */ 45 unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */ 46 struct linux_rtc_time time; /* time the alarm is set to */ 47 }; 48 49 /* 50 * ioctl calls that are permitted to the /dev/rtc interface, if 51 * any of the RTC drivers are enabled. 52 */ 53 #define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */ 54 #define RTC_AIE_OFF _IO('p', 0x02) /* ... off */ 55 #define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */ 56 #define RTC_UIE_OFF _IO('p', 0x04) /* ... off */ 57 #define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */ 58 #define RTC_PIE_OFF _IO('p', 0x06) /* ... off */ 59 #define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */ 60 #define RTC_WIE_OFF _IO('p', 0x10) /* ... off */ 61 62 #define RTC_ALM_SET _IOW('p', 0x07, struct linux_rtc_time) /* Set alarm time */ 63 #define RTC_ALM_READ _IOR('p', 0x08, struct linux_rtc_time) /* Read alarm time */ 64 #define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */ 65 #define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */ 66 #define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */ 67 #define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */ 68 #define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */ 69 #define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */ 70 71 #define RTC_WKALM_SET _IOW('p', 0x0f, struct linux_rtc_wkalrm)/* Set wakeup alarm*/ 72 #define RTC_WKALM_RD _IOR('p', 0x10, struct linux_rtc_wkalrm)/* Get wakeup alarm*/ 73 74 /* interrupt flags */ 75 #define RTC_IRQF 0x80 /* any of the following is active */ 76 #define RTC_PF 0x40 77 #define RTC_AF 0x20 78 #define RTC_UF 0x10 79 80 POP_SAVED_FUNCTION_VISIBILITY 81 82 #endif 83