uboot-mt623x/drivers/rtc/s3c44b0_rtc.c

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/*
* (C) Copyright 2004
* DAVE Srl
* http://www.dave-tech.it
* http://www.wawnet.biz
* mailto:info@wawnet.biz
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* S3C44B0 CPU specific code
*/
#include <common.h>
#include <command.h>
#include <asm/hardware.h>
#include <rtc.h>
#include <bcd.h>
int rtc_get (struct rtc_time* tm)
{
RTCCON |= 1;
tm->tm_year = BCD2BIN(BCDYEAR);
tm->tm_mon = BCD2BIN(BCDMON);
tm->tm_wday = BCD2BIN(BCDDATE);
tm->tm_mday = BCD2BIN(BCDDAY);
tm->tm_hour = BCD2BIN(BCDHOUR);
tm->tm_min = BCD2BIN(BCDMIN);
tm->tm_sec = BCD2BIN(BCDSEC);
if (tm->tm_sec==0) {
/* we have to re-read the rtc data because of the "one second deviation" problem */
/* see RTC datasheet for more info about it */
tm->tm_year = BCD2BIN(BCDYEAR);
tm->tm_mon = BCD2BIN(BCDMON);
tm->tm_mday = BCD2BIN(BCDDAY);
tm->tm_wday = BCD2BIN(BCDDATE);
tm->tm_hour = BCD2BIN(BCDHOUR);
tm->tm_min = BCD2BIN(BCDMIN);
tm->tm_sec = BCD2BIN(BCDSEC);
}
RTCCON &= ~1;
if(tm->tm_year >= 70)
tm->tm_year += 1900;
else
tm->tm_year += 2000;
return 0;
}
int rtc_set (struct rtc_time* tm)
{
if(tm->tm_year < 2000)
tm->tm_year -= 1900;
else
tm->tm_year -= 2000;
RTCCON |= 1;
BCDYEAR = BIN2BCD(tm->tm_year);
BCDMON = BIN2BCD(tm->tm_mon);
BCDDAY = BIN2BCD(tm->tm_mday);
BCDDATE = BIN2BCD(tm->tm_wday);
BCDHOUR = BIN2BCD(tm->tm_hour);
BCDMIN = BIN2BCD(tm->tm_min);
BCDSEC = BIN2BCD(tm->tm_sec);
RTCCON &= 1;
return 0;
}
void rtc_reset (void)
{
RTCCON |= 1;
BCDYEAR = 0;
BCDMON = 0;
BCDDAY = 0;
BCDDATE = 0;
BCDHOUR = 0;
BCDMIN = 0;
BCDSEC = 0;
RTCCON &= 1;
}