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/*-
* Copyright (c) 2016 Michal Meloun <mmel@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <dev/ofw/ofw_bus.h>
#include "clock_if.h"
#include "as3722.h"
#define AS3722_RTC_START_YEAR 2000
int
as3722_rtc_gettime(device_t dev, struct timespec *ts)
{
struct as3722_softc *sc;
struct clocktime ct;
uint8_t buf[6];
int rv;
sc = device_get_softc(dev);
rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6);
if (rv != 0) {
device_printf(sc->dev, "Failed to read RTC data\n");
return (rv);
}
ct.nsec = 0;
ct.sec = bcd2bin(buf[0] & 0x7F);
ct.min = bcd2bin(buf[1] & 0x7F);
ct.hour = bcd2bin(buf[2] & 0x3F);
ct.day = bcd2bin(buf[3] & 0x3F);
ct.mon = bcd2bin(buf[4] & 0x1F);
ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR;
ct.dow = -1;
return clock_ct_to_ts(&ct, ts);
}
int
as3722_rtc_settime(device_t dev, struct timespec *ts)
{
struct as3722_softc *sc;
struct clocktime ct;
uint8_t buf[6];
int rv;
sc = device_get_softc(dev);
clock_ts_to_ct(ts, &ct);
if (ct.year < AS3722_RTC_START_YEAR)
return (EINVAL);
buf[0] = bin2bcd(ct.sec);
buf[1] = bin2bcd(ct.min);
buf[2] = bin2bcd(ct.hour);
buf[3] = bin2bcd(ct.day);
buf[4] = bin2bcd(ct.mon);
buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR);
rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6);
if (rv != 0) {
device_printf(sc->dev, "Failed to write RTC data\n");
return (rv);
}
return (0);
}
int
as3722_rtc_attach(struct as3722_softc *sc, phandle_t node)
{
int rv;
/* Enable RTC, set 24 hours mode and alarms */
rv = RM1(sc, AS3722_RTC_CONTROL,
AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE,
AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN);
if (rv < 0) {
device_printf(sc->dev, "Failed to initialize RTC controller\n");
return (ENXIO);
}
clock_register(sc->dev, 1000000);
return (0);
}
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