1/* $NetBSD: rtc.h,v 1.2 2009/03/14 14:45:55 dsl Exp $ */
2
3/*
4 * Copyright (c) 1994 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Brini.
21 * 4. The name of the company nor the name of the author may be used to
22 * endorse or promote products derived from this software without specific
23 * prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * 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 * RiscBSD kernel project
38 *
39 * rtc.h
40 *
41 * Header file for RTC / CMOS stuff
42 *
43 * Created : 13/10/94
44 * Updated : 15/07/2000
45 *
46 * Based of kate/display/iiccontrol.c
47 */
48
49/*
50 * IIC addresses for RTC chip
51 * Two PCF8583 chips are supported on the IIC bus
52 */
53
54#define IIC_PCF8583_MASK 0xfc
55#define IIC_PCF8583_ADDR 0xa0
56
57#define RTC_Write (IIC_PCF8583_ADDR | IIC_WRITE)
58#define RTC_Read (IIC_PCF8583_ADDR | IIC_READ)
59
60typedef struct {
61 u_char rtc_micro;
62 u_char rtc_centi;
63 u_char rtc_sec;
64 u_char rtc_min;
65 u_char rtc_hour;
66 u_char rtc_day;
67 u_char rtc_mon;
68 u_char rtc_year;
69 u_char rtc_cen;
70} rtc_t;
71
72#define RTC_ADDR_CHECKSUM 0x3f
73#define RTC_ADDR_BOOTOPTS 0x90
74#define RTC_ADDR_REBOOTCNT 0x91
75#define RTC_ADDR_YEAR 0xc0
76#define RTC_ADDR_CENT 0xc1
77
78#ifdef _KERNEL
79int cmos_read(int);
80int cmos_write(int, int);
81#endif /* _KERNEL */
82
83/* End of rtc.h */