Annotation of sys/arch/hp300/stand/uboot/clock.c, Revision 1.1.1.1
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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