sys/dev/i2c/max6900reg.h

   1 /*      $NetBSD: max6900reg.h,v 1.1.4.3 2004/09/21 13:27:46 skrll Exp $ */
   2
   3 /*
   4  * Copyright (c) 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Steve C. Woodford for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _DEV_I2C_MAX6900REG_H_
  39 #define _DEV_I2C_MAX6900REG_H_
  40
  41 /*
  42  * MAX6900 RTC I2C address:
  43  *
  44  *      101 0000
  45  */
  46 #define MAX6900_ADDRMASK                0x7f
  47 #define MAX6900_ADDR                    0x50
  48
  49 /*
  50  * Command/Addresses
  51  */
  52 #define MAX6900_CMD_WRITE               0x00
  53 #define MAX6900_CMD_READ                0x01
  54
  55 #define MAX6900_REG_SECOND              0x80
  56 #define MAX6900_REG_MINUTE              0x82
  57 #define MAX6900_REG_HOUR                0x84
  58 #define MAX6900_REG_DATE                0x86
  59 #define MAX6900_REG_MONTH               0x88
  60 #define MAX6900_REG_DAY                 0x8a
  61 #define MAX6900_REG_YEAR                0x8c
  62 #define MAX6900_REG_CONTROL             0x8e
  63 #define MAX6900_REG_CENTURY             0x92
  64 #define MAX6900_REG_CLK_BURST           0xbe
  65
  66 #define MAX6900_REG_RAM(addr)           ((addr << 1) + 0xc0)
  67 #define MAX6900_REG_RAM_BURST           0xfe
  68
  69 /*
  70  * Burst Read/Write register layout
  71  */
  72 #define MAX6900_BURST_SECOND            0
  73 #define MAX6900_BURST_MINUTE            1
  74 #define MAX6900_BURST_HOUR              2
  75 #define MAX6900_BURST_DATE              3
  76 #define MAX6900_BURST_MONTH             4
  77 #define MAX6900_BURST_WDAY              5
  78 #define MAX6900_BURST_YEAR              6
  79 #define MAX6900_BURST_CONTROL           7
  80 #define MAX6900_BURST_LEN               8
  81
  82 /*
  83  * Register bits
  84  */
  85 #define MAX6900_SECOND_MASK             0x7f
  86 #define MAX6900_MINUTE_MASK             0x7f
  87 #define MAX6900_HOUR_12HRS              (1u << 7)
  88 #define MAX6900_HOUR_12MASK             0x1f
  89 #define MAX6900_HOUR_12HRS_PM           (1u << 5)
  90 #define MAX6900_HOUR_24MASK             0x3f
  91 #define MAX6900_DATE_MASK               0x3f
  92 #define MAX6900_MONTH_MASK              0x1f
  93 #define MAX6900_CONTROL_WP              (1u << 7)
  94
  95 /*
  96  * NVRAM size
  97  */
  98 #define MAX6900_RAM_BYTES               31
  99
 100 #endif /* _DEV_I2C_MAX6900REG_H_ */