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 60 typedef 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 79 int cmos_read(int); 80 int cmos_write(int, int); 81 #endif /* _KERNEL */ 82 83 /* End of rtc.h */ 84