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      1 /*	$NetBSD: em3027reg.h,v 1.1 2018/01/05 03:07:15 uwe Exp $ */
      2 /*
      3  * Copyright (c) 2018 Valery Ushakov
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 /*
     28  * EM Microelectronic EM3027 RTC
     29  */
     30 #ifndef _EM3027REG_H_
     31 #define _EM3027REG_H_
     32 
     33 #define EM3027_ADDR	0x56
     34 
     35 
     36 /*
     37  * Control Page: 0
     38  */
     39 #define EM3027_ONOFF		0x00
     40 #define   EM3027_ONOFF_CLKOUT		0x80	/* 0: IRQ, 1: CLK */
     41 #define   EM3027_ONOFF_SR		0x10	/* self-recovery */
     42 #define   EM3027_ONOFF_EEREF		0x08	/* EEPROM self-refresh */
     43 #define   EM3027_ONOFF_TR		0x04   	/* timer auto-reload */
     44 #define   EM3027_ONOFF_TI		0x02	/* timer */
     45 #define   EM3027_ONOFF_WA		0x01	/* watch */
     46 
     47 #define EM3027_IRQ_CTL		0x01
     48 #define EM3027_IRQ_FLAGS	0x02
     49 
     50 /* For both EM3027_IRQ_CTL and EM3027_IRQ_FLAGS */
     51 #define   EM3027_IRQ_SR			0x10	/* self-recovery */
     52 #define   EM3027_IRQ_V2			0x08	/* VLow2 */
     53 #define   EM3027_IRQ_V1			0x04	/* VLow1 */
     54 #define   EM3027_IRQ_TINT		0x02	/* timer */
     55 #define   EM3027_IRQ_AINT		0x01	/* alarm */
     56 
     57 #define EM3027_STATUS		0x03
     58 #define   EM3027_STATUS_EEBUSY		0x80	/* r/o: write or self-refresh */
     59 #define   EM3027_STATUS_POWER_ON	0x20
     60 #define   EM3027_STATUS_RESET		0x10	/* after reset or recovery */
     61 #define   EM3027_STATUS_VLOW2		0x08	/* voltage lost */
     62 #define   EM3027_STATUS_VLOW1		0x04	/* voltage low */
     63 
     64 /* Request system reset */
     65 #define EM3027_RESET		0x04
     66 #define   EM3027_RESET_SYSRES		0x10
     67 
     68 
     69 /*
     70  * Watch Page: 1
     71  */
     72 #define EM3027_WATCH_SEC	0x08	/* 0..59 */
     73 #define EM3027_WATCH_MIN	0x09	/* 0..59 */
     74 #define EM3027_WATCH_HOUR	0x0a	/* 0..23 or 1..12 */
     75 #define   EM3027_WATCH_HOUR_S12		0x40	/* select 12/24 hours */
     76 #define   EM3027_WATCH_HOUR_PM		0x20	/* am/pm if 12 hours */
     77 #define EM3027_WATCH_DAY	0x0b	/* 1..31 */
     78 #define EM3027_WATCH_WDAY	0x0c	/* 1..7 */
     79 #define EM3027_WATCH_MON	0x0d	/* 1..12 */
     80 #define EM3027_WATCH_YEAR	0x0e	/* 0..79 */
     81 
     82 
     83 /*
     84  * Alarm Page: 2
     85  *
     86  * Same format as watch registers except there's no S12 bit in the
     87  * hours register and the upper bit (EM3027_ALARM_ENABLE) in each
     88  * register selects it for comparison.
     89  */
     90 #define EM3027_ALARM_SEC	0x10
     91 #define EM3027_ALARM_MIN	0x11
     92 #define EM3027_ALARM_HOUR	0x12
     93 #define EM3027_ALARM_DATE	0x13
     94 #define EM3027_ALARM_DAYS	0x14
     95 #define EM3027_ALARM_MON	0x15
     96 #define EM3027_ALARM_YEAR	0x16
     97 
     98 /* MSB in each alarm register enables comparison */
     99 #define   EM3027_ALARM_ENABLE		0x80
    100 
    101 
    102 /*
    103  * Timer Page: 3
    104  */
    105 #define EM3027_TIMER_LO		0x18
    106 #define EM3027_TIMER_HI		0x19
    107 
    108 
    109 /*
    110  * Temperature Page: 4
    111  */
    112 #define EM3027_TEMP		0x20	/* -60..195C */
    113 #define   EM3027_TEMP_BASE		(-60)
    114 
    115 
    116 /*
    117  * EEPROM Control Page: 6
    118  */
    119 #define EM3027_EEPROM_CTL	0x30
    120 
    121 /* Trickle charger resistors */
    122 #define   EM3027_EEPROM_CHARGER_MASK	0xf0
    123 #define   EM3027_EEPROM_R80K		0x80
    124 #define   EM3027_EEPROM_R20K		0x40
    125 #define   EM3027_EEPROM_R5K		0x20
    126 #define   EM3027_EEPROM_R1_5K		0x10
    127 
    128 /* Frequency compensated for temperature (0x00 selects raw
    129    uncompensated 32768KHz */
    130 #define   EM3027_EEPROM_FREQ_MASK	0x0c
    131 #define   EM3027_EEPROM_FREQ_1HZ	0x0c
    132 #define   EM3027_EEPROM_FREQ_32HZ	0x08
    133 #define   EM3027_EEPROM_FREQ_1024HZ	0x04
    134 
    135 #define   EM3027_EEPROM_THERM_ENABLE	0x02
    136 #define   EM3027_EEPROM_THERM_PERIOD	0x01	/* 0: 1s, 1: 16s */
    137 
    138 #endif	/* _EM3027REG_H_ */
    139