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[dragonfly.git] / sys / bus / isa / rtc.h
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1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)rtc.h 7.1 (Berkeley) 5/12/91
37 * $FreeBSD: src/sys/isa/rtc.h,v 1.12 1999/08/28 00:46:01 peter Exp $
1de703da 38 * $DragonFly: src/sys/bus/isa/rtc.h,v 1.2 2003/06/17 04:28:40 dillon Exp $
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39 */
40
41#ifndef _I386_ISA_RTC_H_
42#define _I386_ISA_RTC_H_ 1
43
44/*
45 * MC146818 RTC Register locations
46 */
47
48#define RTC_SEC 0x00 /* seconds */
49#define RTC_SECALRM 0x01 /* seconds alarm */
50#define RTC_MIN 0x02 /* minutes */
51#define RTC_MINALRM 0x03 /* minutes alarm */
52#define RTC_HRS 0x04 /* hours */
53#define RTC_HRSALRM 0x05 /* hours alarm */
54#define RTC_WDAY 0x06 /* week day */
55#define RTC_DAY 0x07 /* day of month */
56#define RTC_MONTH 0x08 /* month of year */
57#define RTC_YEAR 0x09 /* month of year */
58
59#define RTC_STATUSA 0x0a /* status register A */
60#define RTCSA_TUP 0x80 /* time update, don't look now */
61#define RTCSA_RESET 0x70 /* reset divider */
62#define RTCSA_DIVIDER 0x20 /* divider correct for 32768 Hz */
63#define RTCSA_8192 0x03 /* 8192 Hz interrupt */
64#define RTCSA_4096 0x04
65#define RTCSA_2048 0x05
66#define RTCSA_1024 0x06 /* default for profiling */
67#define RTCSA_PROF RTCSA_1024
68#define RTC_PROFRATE 1024
69#define RTCSA_512 0x07
70#define RTCSA_256 0x08
71#define RTCSA_128 0x09
72#define RTCSA_NOPROF RTCSA_128
73#define RTC_NOPROFRATE 128
74#define RTCSA_64 0x0a
75#define RTCSA_32 0x0b /* 32 Hz interrupt */
76
77#define RTC_STATUSB 0x0b /* status register B */
78#define RTCSB_DST 0x01 /* USA Daylight Savings Time enable */
79#define RTCSB_24HR 0x02 /* 0 = 12 hours, 1 = 24 hours */
80#define RTCSB_BCD 0x04 /* 0 = BCD, 1 = Binary coded time */
81#define RTCSB_SQWE 0x08 /* 1 = output sqare wave at SQW pin */
82#define RTCSB_UINTR 0x10 /* 1 = enable update-ended interrupt */
83#define RTCSB_AINTR 0x20 /* 1 = enable alarm interrupt */
84#define RTCSB_PINTR 0x40 /* 1 = enable periodic clock interrupt */
85#define RTCSB_HALT 0x80 /* stop clock updates */
86
87#define RTC_INTR 0x0c /* status register C (R) interrupt source */
88#define RTCIR_UPDATE 0x10 /* update intr */
89#define RTCIR_ALARM 0x20 /* alarm intr */
90#define RTCIR_PERIOD 0x40 /* periodic intr */
91#define RTCIR_INT 0x80 /* interrupt output signal */
92
93#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */
94#define RTCSD_PWR 0x80 /* clock power OK */
95
96#define RTC_DIAG 0x0e /* status register E - bios diagnostic */
97#define RTCDG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time"
98
99#define RTC_RESET 0x0f /* status register F - reset code byte */
100#define RTCRS_RST 0x00 /* normal reset */
101#define RTCRS_LOAD 0x04 /* load system */
102
103#define RTC_FDISKETTE 0x10 /* diskette drive type in upper/lower nibble */
104#define RTCFDT_NONE 0 /* none present */
105#define RTCFDT_360K 0x10 /* 360K */
106#define RTCFDT_12M 0x20 /* 1.2M */
107#define RTCFDT_720K 0x30 /* 720K */
108#define RTCFDT_144M 0x40 /* 1.44M */
109#define RTCFDT_288M_1 0x50 /* 2.88M, some BIOSes */
110#define RTCFDT_288M 0x60 /* 2.88M */
111
112#define RTC_BASELO 0x15 /* low byte of basemem size */
113#define RTC_BASEHI 0x16 /* high byte of basemem size */
114#define RTC_EXTLO 0x17 /* low byte of extended mem size */
115#define RTC_EXTHI 0x18 /* low byte of extended mem size */
116
117#define RTC_CENTURY 0x32 /* current century */
118#endif /* _I386_ISA_RTC_H_ */