Annotation of sys/arch/hp300/stand/uboot/clock.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: clock.c,v 1.5 2006/08/17 06:31:10 miod Exp $ */
! 2: /* $NetBSD: clock.c,v 1.3 1995/02/20 00:12:09 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1988 University of Utah.
! 6: * Copyright (c) 1982, 1990, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * the Systems Programming Group of the University of Utah Computer
! 11: * Science Department.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * from: Utah $Hdr: clock.c 1.18 91/01/21$
! 38: *
! 39: * @(#)clock.c 8.2 (Berkeley) 1/12/94
! 40: */
! 41:
! 42: #include <sys/param.h>
! 43:
! 44: #include <lib/libsa/stand.h>
! 45:
! 46: #include "samachdep.h"
! 47: #include "hilreg.h"
! 48: #include <hp300/hp300/clockreg.h>
! 49:
! 50: extern void send_hil_cmd(struct hil_dev *, u_char, u_char *, u_char, u_char *);
! 51:
! 52: static int month_days[12] = {
! 53: 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
! 54: };
! 55:
! 56: u_char bbc_registers[13];
! 57: struct hil_dev *bbcaddr = (struct hil_dev *)BBCADDR;
! 58:
! 59: int bbc_to_gmt(u_long *);
! 60: void read_bbc(void);
! 61: u_char read_bbc_reg(int);
! 62:
! 63: time_t
! 64: getsecs()
! 65: {
! 66: static int bbcinited = 0;
! 67: u_long timbuf = 0;
! 68:
! 69: if (!bbc_to_gmt(&timbuf) && !bbcinited)
! 70: printf("WARNING: bad date in battery clock\n");
! 71: bbcinited = 1;
! 72:
! 73: /* Battery clock does not store usec's, so forget about it. */
! 74: return((time_t)timbuf);
! 75: }
! 76:
! 77: int
! 78: bbc_to_gmt(u_long *timbuf)
! 79: {
! 80: int i;
! 81: u_long tmp;
! 82: int year, month, day, hour, min, sec;
! 83:
! 84: read_bbc();
! 85:
! 86: sec = bbc_to_decimal(1, 0);
! 87: min = bbc_to_decimal(3, 2);
! 88:
! 89: /*
! 90: * Hours are different for some reason. Makes no sense really.
! 91: */
! 92: hour = ((bbc_registers[5] & 0x03) * 10) + bbc_registers[4];
! 93: day = bbc_to_decimal(8, 7);
! 94: month = bbc_to_decimal(10, 9);
! 95: year = bbc_to_decimal(12, 11) + 1900;
! 96:
! 97: range_test(hour, 0, 23);
! 98: range_test(day, 1, 31);
! 99: range_test(month, 1, 12);
! 100: range_test(year, STARTOFTIME, 2038); /* 2038 is the end of time. */
! 101:
! 102: tmp = 0;
! 103:
! 104: for (i = STARTOFTIME; i < year; i++)
! 105: tmp += days_in_year(i);
! 106: if (leapyear(year) && month > FEBRUARY)
! 107: tmp++;
! 108:
! 109: for (i = 1; i < month; i++)
! 110: tmp += days_in_month(i);
! 111:
! 112: tmp += (day - 1);
! 113: tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec;
! 114:
! 115: *timbuf = tmp;
! 116: return(1);
! 117: }
! 118:
! 119: void
! 120: read_bbc()
! 121: {
! 122: int i, read_okay;
! 123:
! 124: read_okay = 0;
! 125: while (!read_okay) {
! 126: read_okay = 1;
! 127: for (i = 0; i <= NUM_BBC_REGS; i++)
! 128: bbc_registers[i] = read_bbc_reg(i);
! 129: for (i = 0; i <= NUM_BBC_REGS; i++)
! 130: if (bbc_registers[i] != read_bbc_reg(i))
! 131: read_okay = 0;
! 132: }
! 133: }
! 134:
! 135: u_char
! 136: read_bbc_reg(int reg)
! 137: {
! 138: u_char data = reg;
! 139:
! 140: if (bbcaddr) {
! 141: #if 0
! 142: send_hil_cmd(bbcaddr, BBC_SET_REG, &data, 1, NULL);
! 143: send_hil_cmd(bbcaddr, BBC_READ_REG, NULL, 0, &data);
! 144: #else
! 145: HILWAIT(bbcaddr);
! 146: bbcaddr->hil_cmd = BBC_SET_REG;
! 147: HILWAIT(bbcaddr);
! 148: bbcaddr->hil_data = data;
! 149: HILWAIT(bbcaddr);
! 150: bbcaddr->hil_cmd = BBC_READ_REG;
! 151: HILDATAWAIT(bbcaddr);
! 152: data = bbcaddr->hil_data;
! 153: #endif
! 154: }
! 155: return(data);
! 156: }
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