012e41a7a8
Don't enable the oscillator when it is found to be stopped at init time, just let the first setting of valid time start it. But still report a dead battery if it's stopped at init time. Don't force the chip into 24hr mode, just cope with whatever mode it is already in. Schedule the clock_settime() callbacks to align the RTC clock to top of second when setting it.
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*-
|
|
* Copyright (c) 2014-2015 Luiz Otavio O Souza <loos@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Maxim DS3231 RTC registers.
|
|
*/
|
|
|
|
#ifndef _DS3231REG_H_
|
|
#define _DS3231REG_H_
|
|
|
|
#define DS3231_SECS 0x00
|
|
#define DS3231_SECS_MASK 0x7f
|
|
#define DS3231_MINS 0x01
|
|
#define DS3231_MINS_MASK 0x7f
|
|
#define DS3231_HOUR 0x02
|
|
#define DS3231_HOUR_MASK_12HR 0x3f
|
|
#define DS3231_HOUR_MASK_24HR 0x1f
|
|
#define DS3231_HOUR_IS_PM 0x20
|
|
#define DS3231_HOUR_USE_AMPM 0x40
|
|
#define DS3231_WEEKDAY 0x03
|
|
#define DS3231_WEEKDAY_MASK 0x07
|
|
#define DS3231_DATE 0x04
|
|
#define DS3231_DATE_MASK 0x3f
|
|
#define DS3231_MONTH 0x05
|
|
#define DS3231_MONTH_MASK 0x1f
|
|
#define DS3231_C_MASK 0x80
|
|
#define DS3231_YEAR 0x06
|
|
#define DS3231_YEAR_MASK 0xff
|
|
#define DS3231_CONTROL 0x0e
|
|
#define DS3231_CTRL_EOSC (1 << 7)
|
|
#define DS3231_CTRL_BBSQW (1 << 6)
|
|
#define DS3231_CTRL_CONV (1 << 5)
|
|
#define DS3231_CTRL_RS2 (1 << 4)
|
|
#define DS3231_CTRL_RS1 (1 << 3)
|
|
#define DS3231_CTRL_RS_MASK (DS3231_CTRL_RS2 | DS3231_CTRL_RS1)
|
|
#define DS3231_CTRL_RS_SHIFT 3
|
|
#define DS3231_CTRL_INTCN (1 << 2)
|
|
#define DS3231_CTRL_A2IE (1 << 1)
|
|
#define DS3231_CTRL_A1IE (1 << 0)
|
|
#define DS3231_CTRL_MASK \
|
|
(DS3231_CTRL_EOSC | DS3231_CTRL_A1IE | DS3231_CTRL_A2IE)
|
|
#define DS3231_STATUS 0x0f
|
|
#define DS3231_STATUS_OSF (1 << 7)
|
|
#define DS3231_STATUS_EN32KHZ (1 << 3)
|
|
#define DS3231_STATUS_BUSY (1 << 2)
|
|
#define DS3231_STATUS_A2F (1 << 1)
|
|
#define DS3231_STATUS_A1F (1 << 0)
|
|
#define DS3231_TEMP 0x11
|
|
#define DS3231_TEMP_MASK 0xffc0
|
|
#define DS3231_0500C 0x80
|
|
#define DS3231_0250C 0x40
|
|
#define DS3231_MSB 0x8000
|
|
#define DS3231_NEG_BIT DS3231_MSB
|
|
#define TZ_ZEROC 2731
|
|
|
|
#endif /* _DS3231REG_H_ */
|