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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "i2c.h"
#include "rtc.h"
#include "kernel.h"
#include "system.h"
#include "i2c-pp.h"
#include <stdbool.h>
/* RTC registers */
#define RTC_CTRL1 0x00
#define RTC_CTRL2 0x01
/* Control 2 register flags */
#define RTC_TF 0x04
#define RTC_AF 0x08
void rtc_init(void)
{
unsigned char tmp;
int rv;
/* initialize Control 1 register */
tmp = 0;
pp_i2c_send(0x51, RTC_CTRL1,tmp);
/* read value of the Control 2 register - we'll need it to preserve alarm and timer interrupt assertion flags */
rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
/* clear alarm and timer interrupts */
tmp &= (RTC_TF | RTC_AF);
pp_i2c_send(0x51, RTC_CTRL2,tmp);
}
int rtc_read_datetime(unsigned char* buf)
{
unsigned char tmp;
int read;
/*RTC_E8564's slave address is 0x51*/
read = i2c_readbytes(0x51,0x02,7,buf);
/* swap wday and mday to be compatible with
* get_time() from firmware/common/timefuncs.c */
tmp=buf[3];
buf[3]=buf[4];
buf[4]=tmp;
return read;
}
int rtc_write_datetime(unsigned char* buf)
{
int i;
unsigned char tmp;
/* swap wday and mday to be compatible with
* set_time() in firmware/common/timefuncs.c */
tmp=buf[3];
buf[3]=buf[4];
buf[4]=tmp;
for (i=0;i<7;i++){
pp_i2c_send(0x51, 0x02+i,buf[i]);
}
return 1;
}
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