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      1 /*	$NetBSD: rtc.h,v 1.10 2012/11/14 13:36:02 rkujawa Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Christian E. Hopps
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Christian E. Hopps.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  *
     32  * information on A3000 clock from Holger Emden.
     33  */
     34 #ifndef _RTCVAR_H_
     35 #define _RTCVAR_H_
     36 
     37 /* this is a hook set by a clock driver for the configured realtime clock,
     38    returning plain current unix-time */
     39 
     40 extern int (*ugettod)(struct timeval *);
     41 extern int (*usettod)(struct timeval *);
     42 
     43 struct rtclock3000 {
     44 	u_int  :28, second2:4;	/* 0x03  lower digit */
     45 	u_int  :28, second1:4;	/* 0x07  upper digit */
     46 	u_int  :28, minute2:4;	/* 0x0b  lower digit */
     47 	u_int  :28, minute1:4;	/* 0x0f  upper digit */
     48 	u_int  :28, hour2:4;	/* 0x13  lower digit */
     49 	u_int  :28, hour1:4;	/* 0x17  upper digit */
     50 	u_int  :28, weekday:4;	/* 0x1b */
     51 	u_int  :28, day2:4;	/* 0x1f  lower digit */
     52 	u_int  :28, day1:4;	/* 0x23  upper digit */
     53 	u_int  :28, month2:4;	/* 0x27  lower digit */
     54 	u_int  :28, month1:4;	/* 0x2b  upper digit */
     55 	u_int  :28, year2:4;	/* 0x2f  lower digit */
     56 	u_int  :28, year1:4;	/* 0x33  upper digit */
     57 	u_int  :28, control1:4;	/* 0x37  control-byte 1 */
     58 	u_int  :28, control2:4;	/* 0x3b  control-byte 2 */
     59 	u_int  :28, control3:4;	/* 0x3f  control-byte 3 */
     60 };
     61 
     62 #define A3CONTROL1_HOLD_CLOCK	0
     63 #define A3CONTROL1_FREE_CLOCK	9
     64 
     65 /* mode1 registers used by us */
     66 #define leapyear year2
     67 
     68 #define A3BBC_SET_REG 	0xe0
     69 #define A3BBC_WRITE_REG	0xc2
     70 #define A3BBC_READ_REG	0xc3
     71 #define A3NUM_BBC_REGS	12
     72 
     73 /*
     74  * Our clock starts at 1/1/1970, but counts the years from 1900.
     75  */
     76 #define	STARTOFTIME	1970
     77 #define	CLOCK_BASE_YEAR	1900
     78 
     79 #endif /* _RTCVAR_H_ */
     80