/* * include/asm-parisc/rtc.h * * Copyright 2002 Randolph CHung <tausq@debian.org> * * Based on: include/asm-ppc/rtc.h and the genrtc driver in the * 2.4 parisc linux tree */ #ifndef __ASM_RTC_H__ #define __ASM_RTC_H__ #ifdef __KERNEL__ #include <linux/rtc.h> #include <asm/pdc.h> #define SECS_PER_HOUR (60 * 60) #define SECS_PER_DAY (SECS_PER_HOUR * 24) #define RTC_PIE 0x40 /* periodic interrupt enable */ #define RTC_AIE 0x20 /* alarm interrupt enable */ #define RTC_UIE 0x10 /* update-finished interrupt enable */ #define RTC_BATT_BAD 0x100 /* battery bad */ /* some dummy definitions */ #define RTC_SQWE 0x08 /* enable square-wave output */ #define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */ #define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */ #define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */ # define __isleap(year) \ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) /* How many days come before each month (0-12). */ static const unsigned short int __mon_yday[2][13] = { /* Normal years. */ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, /* Leap years. */ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } }; static inline unsigned int get_rtc_time(struct rtc_time *wtime) { struct pdc_tod tod_data; long int days, rem, y; const unsigned short int *ip; if(pdc_tod_read(&tod_data) < 0) return RTC_24H | RTC_BATT_BAD; // most of the remainder of this function is: // Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc. // This was originally a part of the GNU C Library. // It is distributed under the GPL, and was swiped from offtime.c days = tod_data.tod_sec / SECS_PER_DAY; rem = tod_data.tod_sec % SECS_PER_DAY; wtime->tm_hour = rem / SECS_PER_HOUR; rem %= SECS_PER_HOUR; wtime->tm_min = rem / 60; wtime->tm_sec = rem % 60; y = 1970; #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) while (days < 0 || days >= (__isleap (y) ? 366 : 365)) { /* Guess a corrected year, assuming 365 days per year. */ long int yg = y + days / 365 - (days % 365 < 0); /* Adjust DAYS and Y to match the guessed year. */ days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1) - LEAPS_THRU_END_OF (y - 1)); y = yg; } wtime->tm_year = y - 1900; ip = __mon_yday[__isleap(y)]; for (y = 11; days < (long int) ip[y]; --y) continue; days -= ip[y]; wtime->tm_mon = y; wtime->tm_mday = days + 1; return RTC_24H; } static int set_rtc_time(struct rtc_time *wtime) { u_int32_t secs; secs = mktime(wtime->tm_year + 1900, wtime->tm_mon + 1, wtime->tm_mday, wtime->tm_hour, wtime->tm_min, wtime->tm_sec); if(pdc_tod_set(secs, 0) < 0) return -1; else return 0; } static inline unsigned int get_rtc_ss(void) { struct rtc_time h; get_rtc_time(&h); return h.tm_sec; } static inline int get_rtc_pll(struct rtc_pll_info *pll) { return -EINVAL; } static inline int set_rtc_pll(struct rtc_pll_info *pll) { return -EINVAL; } #endif /* __KERNEL__ */ #endif /* __ASM_RTC_H__ */