101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
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/* $NetBSD: max6900reg.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Steve C. Woodford for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_I2C_MAX6900REG_H_
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#define _DEV_I2C_MAX6900REG_H_
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/*
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* MAX6900 RTC I2C address:
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*
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* 101 0000
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*/
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#define MAX6900_ADDRMASK 0x7f
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#define MAX6900_ADDR 0x50
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/*
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* Command/Addresses
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*/
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#define MAX6900_CMD_WRITE 0x00
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#define MAX6900_CMD_READ 0x01
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#define MAX6900_REG_SECOND 0x80
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#define MAX6900_REG_MINUTE 0x82
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#define MAX6900_REG_HOUR 0x84
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#define MAX6900_REG_DATE 0x86
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#define MAX6900_REG_MONTH 0x88
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#define MAX6900_REG_DAY 0x8a
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#define MAX6900_REG_YEAR 0x8c
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#define MAX6900_REG_CONTROL 0x8e
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#define MAX6900_REG_CENTURY 0x92
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#define MAX6900_REG_CLK_BURST 0xbe
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#define MAX6900_REG_RAM(addr) ((addr << 1) + 0xc0)
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#define MAX6900_REG_RAM_BURST 0xfe
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/*
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* Burst Read/Write register layout
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*/
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#define MAX6900_BURST_SECOND 0
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#define MAX6900_BURST_MINUTE 1
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#define MAX6900_BURST_HOUR 2
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#define MAX6900_BURST_DATE 3
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#define MAX6900_BURST_MONTH 4
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#define MAX6900_BURST_WDAY 5
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#define MAX6900_BURST_YEAR 6
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#define MAX6900_BURST_CONTROL 7
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#define MAX6900_BURST_LEN 8
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/*
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* Register bits
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*/
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#define MAX6900_SECOND_MASK 0x7f
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#define MAX6900_MINUTE_MASK 0x7f
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#define MAX6900_HOUR_12HRS (1u << 7)
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#define MAX6900_HOUR_12MASK 0x1f
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#define MAX6900_HOUR_12HRS_PM (1u << 5)
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#define MAX6900_HOUR_24MASK 0x3f
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#define MAX6900_DATE_MASK 0x3f
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#define MAX6900_MONTH_MASK 0x1f
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#define MAX6900_CONTROL_WP (1u << 7)
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/*
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* NVRAM size
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*/
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#define MAX6900_RAM_BYTES 31
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#endif /* _DEV_I2C_MAX6900REG_H_ */
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