1 /* $NetBSD: clock.c,v 1.1 1997/02/04 03:52:15 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 41 * 42 * @(#)clock.c 8.2 (Berkeley) 1/12/94 43 */ 44 45 #include <sys/param.h> 46 47 #include <hp300/dev/hilreg.h> 48 #include <hp300/hp300/clockreg.h> 49 50 #include <hp300/stand/common/samachdep.h> 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 u_char read_bbc_reg(); 58 struct hil_dev *bbcaddr = BBCADDR; 59 60 getsecs() 61 { 62 static int bbcinited = 0; 63 u_long timbuf = 0; 64 65 if (!bbc_to_gmt(&timbuf) && !bbcinited) 66 printf("WARNING: bad date in battery clock\n"); 67 bbcinited = 1; 68 69 /* Battery clock does not store usec's, so forget about it. */ 70 return(timbuf); 71 } 72 73 74 bbc_to_gmt(timbuf) 75 u_long *timbuf; 76 { 77 register int i; 78 register u_long tmp; 79 int year, month, day, hour, min, sec; 80 81 read_bbc(); 82 83 sec = bbc_to_decimal(1, 0); 84 min = bbc_to_decimal(3, 2); 85 86 /* 87 * Hours are different for some reason. Makes no sense really. 88 */ 89 hour = ((bbc_registers[5] & 0x03) * 10) + bbc_registers[4]; 90 day = bbc_to_decimal(8, 7); 91 month = bbc_to_decimal(10, 9); 92 year = bbc_to_decimal(12, 11) + 1900; 93 94 range_test(hour, 0, 23); 95 range_test(day, 1, 31); 96 range_test(month, 1, 12); 97 range_test(year, STARTOFTIME, 2000); 98 99 tmp = 0; 100 101 for (i = STARTOFTIME; i < year; i++) 102 tmp += days_in_year(i); 103 if (leapyear(year) && month > FEBRUARY) 104 tmp++; 105 106 for (i = 1; i < month; i++) 107 tmp += days_in_month(i); 108 109 tmp += (day - 1); 110 tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec; 111 112 *timbuf = tmp; 113 return(1); 114 } 115 116 read_bbc() 117 { 118 register int i, read_okay; 119 120 read_okay = 0; 121 while (!read_okay) { 122 read_okay = 1; 123 for (i = 0; i <= NUM_BBC_REGS; i++) 124 bbc_registers[i] = read_bbc_reg(i); 125 for (i = 0; i <= NUM_BBC_REGS; i++) 126 if (bbc_registers[i] != read_bbc_reg(i)) 127 read_okay = 0; 128 } 129 } 130 131 u_char 132 read_bbc_reg(reg) 133 int reg; 134 { 135 u_char data = reg; 136 137 if (bbcaddr) { 138 #if 0 139 send_hil_cmd(bbcaddr, BBC_SET_REG, &data, 1, NULL); 140 send_hil_cmd(bbcaddr, BBC_READ_REG, NULL, 0, &data); 141 #else 142 HILWAIT(bbcaddr); 143 bbcaddr->hil_cmd = BBC_SET_REG; 144 HILWAIT(bbcaddr); 145 bbcaddr->hil_data = data; 146 HILWAIT(bbcaddr); 147 bbcaddr->hil_cmd = BBC_READ_REG; 148 HILDATAWAIT(bbcaddr); 149 data = bbcaddr->hil_data; 150 #endif 151 } 152 return(data); 153 } 154