154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/* $NetBSD: clock.c,v 1.1 1997/02/04 03:52:15 thorpej Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: clock.c 1.18 91/01/21$
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*
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* @(#)clock.c 8.2 (Berkeley) 1/12/94
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*/
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#include <sys/param.h>
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#include <hp300/dev/hilreg.h>
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#include <hp300/hp300/clockreg.h>
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#include <hp300/stand/common/samachdep.h>
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static int month_days[12] = {
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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u_char bbc_registers[13];
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u_char read_bbc_reg();
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struct hil_dev *bbcaddr = BBCADDR;
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getsecs()
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{
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static int bbcinited = 0;
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u_long timbuf = 0;
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if (!bbc_to_gmt(&timbuf) && !bbcinited)
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printf("WARNING: bad date in battery clock\n");
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bbcinited = 1;
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/* Battery clock does not store usec's, so forget about it. */
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return(timbuf);
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}
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bbc_to_gmt(timbuf)
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u_long *timbuf;
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{
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register int i;
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register u_long tmp;
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int year, month, day, hour, min, sec;
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read_bbc();
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sec = bbc_to_decimal(1, 0);
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min = bbc_to_decimal(3, 2);
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/*
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* Hours are different for some reason. Makes no sense really.
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*/
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hour = ((bbc_registers[5] & 0x03) * 10) + bbc_registers[4];
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day = bbc_to_decimal(8, 7);
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month = bbc_to_decimal(10, 9);
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year = bbc_to_decimal(12, 11) + 1900;
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range_test(hour, 0, 23);
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range_test(day, 1, 31);
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range_test(month, 1, 12);
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range_test(year, STARTOFTIME, 2000);
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tmp = 0;
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for (i = STARTOFTIME; i < year; i++)
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tmp += days_in_year(i);
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if (leapyear(year) && month > FEBRUARY)
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tmp++;
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for (i = 1; i < month; i++)
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tmp += days_in_month(i);
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tmp += (day - 1);
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tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec;
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*timbuf = tmp;
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return(1);
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}
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read_bbc()
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{
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register int i, read_okay;
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read_okay = 0;
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while (!read_okay) {
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read_okay = 1;
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for (i = 0; i <= NUM_BBC_REGS; i++)
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bbc_registers[i] = read_bbc_reg(i);
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for (i = 0; i <= NUM_BBC_REGS; i++)
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if (bbc_registers[i] != read_bbc_reg(i))
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read_okay = 0;
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}
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}
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u_char
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read_bbc_reg(reg)
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int reg;
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{
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u_char data = reg;
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if (bbcaddr) {
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#if 0
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send_hil_cmd(bbcaddr, BBC_SET_REG, &data, 1, NULL);
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send_hil_cmd(bbcaddr, BBC_READ_REG, NULL, 0, &data);
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#else
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HILWAIT(bbcaddr);
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bbcaddr->hil_cmd = BBC_SET_REG;
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HILWAIT(bbcaddr);
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bbcaddr->hil_data = data;
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HILWAIT(bbcaddr);
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bbcaddr->hil_cmd = BBC_READ_REG;
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HILDATAWAIT(bbcaddr);
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data = bbcaddr->hil_data;
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#endif
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}
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return(data);
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}
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