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/* $OpenBSD: clock.c,v 1.5 2006/08/17 06:31:10 miod Exp $ */
/* $NetBSD: clock.c,v 1.3 1995/02/20 00:12:09 mycroft Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: Utah $Hdr: clock.c 1.18 91/01/21$
*
* @(#)clock.c 8.2 (Berkeley) 1/12/94
*/
#include <sys/param.h>
#include <lib/libsa/stand.h>
#include "samachdep.h"
#include "hilreg.h"
#include <hp300/hp300/clockreg.h>
extern void send_hil_cmd(struct hil_dev *, u_char, u_char *, u_char, u_char *);
static int month_days[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
u_char bbc_registers[13];
struct hil_dev *bbcaddr = (struct hil_dev *)BBCADDR;
int bbc_to_gmt(u_long *);
void read_bbc(void);
u_char read_bbc_reg(int);
time_t
getsecs()
{
static int bbcinited = 0;
u_long timbuf = 0;
if (!bbc_to_gmt(&timbuf) && !bbcinited)
printf("WARNING: bad date in battery clock\n");
bbcinited = 1;
/* Battery clock does not store usec's, so forget about it. */
return((time_t)timbuf);
}
int
bbc_to_gmt(u_long *timbuf)
{
int i;
u_long tmp;
int year, month, day, hour, min, sec;
read_bbc();
sec = bbc_to_decimal(1, 0);
min = bbc_to_decimal(3, 2);
/*
* Hours are different for some reason. Makes no sense really.
*/
hour = ((bbc_registers[5] & 0x03) * 10) + bbc_registers[4];
day = bbc_to_decimal(8, 7);
month = bbc_to_decimal(10, 9);
year = bbc_to_decimal(12, 11) + 1900;
range_test(hour, 0, 23);
range_test(day, 1, 31);
range_test(month, 1, 12);
range_test(year, STARTOFTIME, 2038); /* 2038 is the end of time. */
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) * 60 + sec;
*timbuf = tmp;
return(1);
}
void
read_bbc()
{
int i, read_okay;
read_okay = 0;
while (!read_okay) {
read_okay = 1;
for (i = 0; i <= NUM_BBC_REGS; i++)
bbc_registers[i] = read_bbc_reg(i);
for (i = 0; i <= NUM_BBC_REGS; i++)
if (bbc_registers[i] != read_bbc_reg(i))
read_okay = 0;
}
}
u_char
read_bbc_reg(int reg)
{
u_char data = reg;
if (bbcaddr) {
#if 0
send_hil_cmd(bbcaddr, BBC_SET_REG, &data, 1, NULL);
send_hil_cmd(bbcaddr, BBC_READ_REG, NULL, 0, &data);
#else
HILWAIT(bbcaddr);
bbcaddr->hil_cmd = BBC_SET_REG;
HILWAIT(bbcaddr);
bbcaddr->hil_data = data;
HILWAIT(bbcaddr);
bbcaddr->hil_cmd = BBC_READ_REG;
HILDATAWAIT(bbcaddr);
data = bbcaddr->hil_data;
#endif
}
return(data);
}
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