/*      $NetBSD: ds1687reg.h,v 1.1 2002/02/10 12:26:01 chris Exp $      */

/*
 * Copyright (c) 1998 Mark Brinicombe.
 * Copyright (c) 1998 Causality Limited.
 * All rights reserved.
 *
 * Written by Mark Brinicombe, Causality Limited
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Mark Brinicombe
 *      for the NetBSD Project.
 * 4. The name of the company nor the name of the author may be used to
 *    endorse or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#define RTC_ADDR                0x72
#define RTC_ADDR_REG            0x00
#define RTC_DATA_REG            0x01

#define RTC_SECONDS             0x00
#define RTC_SECONDS_ALARM       0x01
#define RTC_MINUTES             0x02
#define RTC_MINUTES_ALARM       0x03
#define RTC_HOURS               0x04
#define RTC_HOURS_ALARM         0x05
#define RTC_DAYOFWEEK           0x06
#define RTC_DAYOFMONTH          0x07
#define RTC_MONTH               0x08
#define RTC_YEAR                0x09

#define RTC_REG_A               0x0a
#define  RTC_REG_A_UIP          0x80    /* Update In Progress */
#define  RTC_REG_A_DV2          0x40    /* Countdown CHain */
#define  RTC_REG_A_DV1          0x20    /* Oscillator Enable */
#define  RTC_REG_A_DV0          0x10    /* Bank Select */
#define  RTC_REG_A_BANK_MASK    RTC_REG_A_DV0
#define  RTC_REG_A_BANK1        RTC_REG_A_DV0
#define  RTC_REG_A_BANK0        0x00
#define  RTC_REG_A_RS_MASK      0x0f    /* Rate select mask */
#define  RTC_REG_A_RS_NONE      0x00
#define  RTC_REG_A_RS_256HZ_1   0x01
#define  RTC_REG_A_RS_128HZ_1   0x02
#define  RTC_REG_A_RS_8192HZ    0x03
#define  RTC_REG_A_RS_4096HZ    0x04
#define  RTC_REG_A_RS_2048HZ    0x05
#define  RTC_REG_A_RS_1024HZ    0x06
#define  RTC_REG_A_RS_512HZ     0x07
#define  RTC_REG_A_RS_256HZ     0x08
#define  RTC_REG_A_RS_128HZ     0x09
#define  RTC_REG_A_RS_64HZ      0x0A
#define  RTC_REG_A_RS_32HZ      0x0B
#define  RTC_REG_A_RS_16HZ      0x0C
#define  RTC_REG_A_RS_8HZ       0x0D
#define  RTC_REG_A_RS_4HZ       0x0E
#define  RTC_REG_A_RS_2HZ       0x0F

#define RTC_REG_B               0x0b
#define  RTC_REG_B_SET          0x80    /* Inhibit update */
#define  RTC_REG_B_PIE          0x40    /* Periodic Interrupt Enable */
#define  RTC_REG_B_AIE          0x20    /* Alarm Interrupt Enable */
#define  RTC_REG_B_UIE          0x10    /* Updated Ended Interrupt Enable */
#define  RTC_REG_B_SQWE         0x08    /* Square Wave Enable */
#define  RTC_REG_B_DM           0x04    /* Data Mode */
#define  RTC_REG_B_BINARY       RTC_REG_B_DM
#define  RTC_REG_B_BCD          0
#define  RTC_REG_B_24_12        0x02    /* Hour format */
#define  RTC_REG_B_24_HOUR      RTC_REG_B_24_12
#define  RTC_REG_B_12_HOUR      0
#define  RTC_REG_B_DSE          0x01    /* Daylight Savings Enable */

#define RTC_REG_C               0x0c
#define  RTC_REG_C_IRQF         0x80    /* Interrupt Request Flag */
#define  RTC_REG_C_PF           0x40    /* Periodic Interrupt Flag */
#define  RTC_REG_C_AF           0x20    /* Alarm Interrupt Flag */
#define  RTC_REG_C_UF           0x10    /* Update Ended Flags */

#define RTC_REG_D               0x0d
#define  RTC_REG_D_VRT          0x80    /* Valid RAM and Time */

#define RTC_PC_RAM_START        0x0e
#define RTC_PC_RAM_SIZE         50

#define RTC_BANK0_RAM_START     0x40
#define RTC_BANK0_RAM_SIZE      0x40

#define RTC_MODEL               0x40
#define RTC_SERIAL_1            0x41
#define RTC_SERIAL_2            0x42
#define RTC_SERIAL_3            0x43
#define RTC_SERIAL_4            0x44
#define RTC_SERIAL_5            0x45
#define RTC_SERIAL_6            0x46
#define RTC_CRC                 0x47
#define RTC_CENTURY             0x48
#define RTC_DATE_ALARM          0x49
#define RTC_REG_4A              0x4a
#define  RTC_REG_4A_VRT2        0x80
#define  RTC_REG_4A_INCR        0x40
#define  RTC_REG_4A_PAB         0x08
#define  RTC_REG_4A_RF          0x04
#define RTC_REG_4B              0x4b
#define RTC_EXT_RAM_ADDRESS     0x50
#define RTC_EXT_RAM_DATA        0x53
#define RTC_EXT_RAM_START       0x00
#define RTC_EXT_RAM_SIZE        0x80