/* $NetBSD: rtclock.c,v 1.1.1.1 1996/05/05 12:17:03 oki Exp $ */ /* * Copyright 1993, 1994 Masaru Oki * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Masaru Oki. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * X680x0 internal real time clock interface * alarm is not supported. */ #include #include #include #include #include #include #include #include #include static u_long rtgettod __P((void)); static int rtsettod __P((long)); /* * x68k/clock.c calls thru this vector, if it is set, to read * the realtime clock. */ u_long (*gettod) __P((void)); int (*settod)(); static volatile union rtc *rtc_addr = 0; int rtclockinit() { rtc_addr = &IODEVbase->io_rtc; if (rtgettod()) { gettod = rtgettod; settod = rtsettod; } else { return 0; } return 1; } static int month_days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; static u_long rtgettod() { register int i; register u_long tmp; int year, month, day, hour, min, sec; /* hold clock */ RTC_WRITE(rtc_addr, mode, RTC_HOLD_CLOCK); /* read it */ sec = RTC_REG(sec10) * 10 + RTC_REG(sec); min = RTC_REG(min10) * 10 + RTC_REG(min); hour = RTC_REG(hour10) * 10 + RTC_REG(hour); day = RTC_REG(day10) * 10 + RTC_REG(day); month = RTC_REG(mon10) * 10 + RTC_REG(mon); year = RTC_REG(year10) * 10 + RTC_REG(year) + 1980; /* let it run again.. */ RTC_WRITE(rtc_addr, mode, RTC_FREE_CLOCK); range_test(hour, 0, 23); range_test(day, 1, 31); range_test(month, 1, 12); range_test(year, STARTOFTIME, 2000); tmp = 0; for (i = STARTOFTIME; i < year; i++) tmp += days_in_year(i); if (leapyear(year) && month > FEBRUARY) tmp++; for (i = 1; i < month; i++) tmp += days_in_month(i); tmp += (day - 1); tmp = ((tmp * 24 + hour) * 60 + min + TIMEZONE) * 60 + sec; return tmp; } static int rtsettod (tim) long tim; { /* * I don't know if setting the clock is analogous * to reading it, I don't have demo-code for setting. * just give it a try.. */ register int i; register long hms, day; u_char sec1, sec2; u_char min1, min2; u_char hour1, hour2; u_char day1, day2; u_char mon1, mon2; u_char year1, year2; /* * there seem to be problems with the bitfield addressing * currently used.. */ if (!rtc_addr) return 0; tim -= (TIMEZONE * 60); /* prepare values to be written to clock */ day = tim / SECDAY; hms = tim % SECDAY; hour2 = hms / 3600; hour1 = hour2 / 10; hour2 %= 10; min2 = (hms % 3600) / 60; min1 = min2 / 10; min2 %= 10; sec2 = (hms % 3600) % 60; sec1 = sec2 / 10; sec2 %= 10; /* Number of years in days */ for (i = STARTOFTIME - 1980; day >= days_in_year(i); i++) day -= days_in_year(i); year1 = i / 10; year2 = i % 10; /* Number of months in days left */ if (leapyear(i)) days_in_month(FEBRUARY) = 29; for (i = 1; day >= days_in_month(i); i++) day -= days_in_month(i); days_in_month(FEBRUARY) = 28; mon1 = i / 10; mon2 = i % 10; /* Days are what is left over (+1) from all that. */ day ++; day1 = day / 10; day2 = day % 10; RTC_WRITE(rtc_addr, mode, RTC_HOLD_CLOCK); RTC_WRITE(rtc_addr, sec10, sec1); RTC_WRITE(rtc_addr, sec, sec2); RTC_WRITE(rtc_addr, min10, min1); RTC_WRITE(rtc_addr, min, min2); RTC_WRITE(rtc_addr, hour10, hour1); RTC_WRITE(rtc_addr, hour, hour2); RTC_WRITE(rtc_addr, day10, day1); RTC_WRITE(rtc_addr, day, day2); RTC_WRITE(rtc_addr, mon10, mon1); RTC_WRITE(rtc_addr, mon, mon2); RTC_WRITE(rtc_addr, year10, year1); RTC_WRITE(rtc_addr, year, year2); RTC_WRITE(rtc_addr, mode, RTC_FREE_CLOCK); return 1; }