169 lines
4.6 KiB
C
169 lines
4.6 KiB
C
/*
|
|
* (C) Copyright 2001
|
|
* Denis Peter MPL AG Switzerland. d.peter@mpl.ch
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* Date & Time support for the MC146818 (PIXX4) RTC
|
|
*/
|
|
|
|
/*#define DEBUG*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <rtc.h>
|
|
|
|
#ifdef __I386__
|
|
#include <asm/io.h>
|
|
#define in8(p) inb(p)
|
|
#define out8(p, v) outb(v, p)
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
static uchar rtc_read (uchar reg);
|
|
static void rtc_write (uchar reg, uchar val);
|
|
|
|
#define RTC_PORT_MC146818 CONFIG_SYS_ISA_IO_BASE_ADDRESS + 0x70
|
|
#define RTC_SECONDS 0x00
|
|
#define RTC_SECONDS_ALARM 0x01
|
|
#define RTC_MINUTES 0x02
|
|
#define RTC_MINUTES_ALARM 0x03
|
|
#define RTC_HOURS 0x04
|
|
#define RTC_HOURS_ALARM 0x05
|
|
#define RTC_DAY_OF_WEEK 0x06
|
|
#define RTC_DATE_OF_MONTH 0x07
|
|
#define RTC_MONTH 0x08
|
|
#define RTC_YEAR 0x09
|
|
#define RTC_CONFIG_A 0x0A
|
|
#define RTC_CONFIG_B 0x0B
|
|
#define RTC_CONFIG_C 0x0C
|
|
#define RTC_CONFIG_D 0x0D
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int rtc_get (struct rtc_time *tmp)
|
|
{
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
/* here check if rtc can be accessed */
|
|
while((rtc_read(RTC_CONFIG_A)&0x80)==0x80);
|
|
sec = rtc_read (RTC_SECONDS);
|
|
min = rtc_read (RTC_MINUTES);
|
|
hour = rtc_read (RTC_HOURS);
|
|
mday = rtc_read (RTC_DATE_OF_MONTH);
|
|
wday = rtc_read (RTC_DAY_OF_WEEK);
|
|
mon = rtc_read (RTC_MONTH);
|
|
year = rtc_read (RTC_YEAR);
|
|
#ifdef RTC_DEBUG
|
|
printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
|
|
"hr: %02x min: %02x sec: %02x\n",
|
|
year, mon, mday, wday,
|
|
hour, min, sec );
|
|
printf ( "Alarms: month: %02x hour: %02x min: %02x sec: %02x\n",
|
|
rtc_read (RTC_CONFIG_D) & 0x3F,
|
|
rtc_read (RTC_HOURS_ALARM),
|
|
rtc_read (RTC_MINUTES_ALARM),
|
|
rtc_read (RTC_SECONDS_ALARM) );
|
|
#endif
|
|
tmp->tm_sec = bcd2bin (sec & 0x7F);
|
|
tmp->tm_min = bcd2bin (min & 0x7F);
|
|
tmp->tm_hour = bcd2bin (hour & 0x3F);
|
|
tmp->tm_mday = bcd2bin (mday & 0x3F);
|
|
tmp->tm_mon = bcd2bin (mon & 0x1F);
|
|
tmp->tm_year = bcd2bin (year);
|
|
tmp->tm_wday = bcd2bin (wday & 0x07);
|
|
if(tmp->tm_year<70)
|
|
tmp->tm_year+=2000;
|
|
else
|
|
tmp->tm_year+=1900;
|
|
tmp->tm_yday = 0;
|
|
tmp->tm_isdst= 0;
|
|
#ifdef RTC_DEBUG
|
|
printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set (struct rtc_time *tmp)
|
|
{
|
|
#ifdef RTC_DEBUG
|
|
printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
#endif
|
|
rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */
|
|
|
|
rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
|
|
rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
|
|
rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
|
|
rtc_write (RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday));
|
|
rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
|
|
rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
|
|
rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
|
|
rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */
|
|
rtc_write(RTC_CONFIG_A,0x20); /* Normal OP */
|
|
rtc_write(RTC_CONFIG_B,0x00);
|
|
rtc_write(RTC_CONFIG_B,0x00);
|
|
rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR
|
|
/*
|
|
* use direct memory access
|
|
*/
|
|
static uchar rtc_read (uchar reg)
|
|
{
|
|
return(in8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg));
|
|
}
|
|
|
|
static void rtc_write (uchar reg, uchar val)
|
|
{
|
|
out8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg, val);
|
|
}
|
|
#else
|
|
static uchar rtc_read (uchar reg)
|
|
{
|
|
out8(RTC_PORT_MC146818,reg);
|
|
return(in8(RTC_PORT_MC146818+1));
|
|
}
|
|
|
|
static void rtc_write (uchar reg, uchar val)
|
|
{
|
|
out8(RTC_PORT_MC146818,reg);
|
|
out8(RTC_PORT_MC146818+1,val);
|
|
}
|
|
#endif
|
|
|
|
#endif
|