230 lines
5.5 KiB
C
230 lines
5.5 KiB
C
/*
|
|
* (C) Copyright 2003
|
|
*
|
|
* 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 DS12887 RTC
|
|
*/
|
|
|
|
#undef RTC_DEBUG
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <config.h>
|
|
#include <rtc.h>
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
#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_CONTROL_A 0x0A
|
|
#define RTC_CONTROL_B 0x0B
|
|
#define RTC_CONTROL_C 0x0C
|
|
#define RTC_CONTROL_D 0x0D
|
|
|
|
#define RTC_CA_UIP 0x80
|
|
#define RTC_CB_DM 0x04
|
|
#define RTC_CB_24_12 0x02
|
|
#define RTC_CB_SET 0x80
|
|
|
|
#if defined(CONFIG_ATC)
|
|
|
|
static uchar rtc_read (uchar reg)
|
|
{
|
|
uchar val;
|
|
|
|
*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
|
|
__asm__ __volatile__ ("sync");
|
|
|
|
val = *(volatile unsigned char*)(RTC_PORT_DATA);
|
|
return (val);
|
|
}
|
|
|
|
static void rtc_write (uchar reg, uchar val)
|
|
{
|
|
*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
|
|
__asm__ __volatile__ ("sync");
|
|
|
|
*(volatile unsigned char*)(RTC_PORT_DATA) = val;
|
|
__asm__ __volatile__ ("sync");
|
|
}
|
|
|
|
#else
|
|
# error Board specific rtc access functions should be supplied
|
|
#endif
|
|
|
|
int rtc_get (struct rtc_time *tmp)
|
|
{
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
|
|
/* check if rtc is available for access */
|
|
while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP)
|
|
;
|
|
|
|
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: %d; mon: %d; mday: %d; wday: %d; "
|
|
"hr: %d; min: %d; sec: %d\n",
|
|
year, mon, mday, wday, hour, min, sec );
|
|
|
|
printf ( "Alarms: hour: %02x min: %02x sec: %02x\n",
|
|
rtc_read (RTC_HOURS_ALARM),
|
|
rtc_read (RTC_MINUTES_ALARM),
|
|
rtc_read (RTC_SECONDS_ALARM) );
|
|
#endif
|
|
|
|
if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
|
|
{ /* Information is in BCD format */
|
|
printf(" Get: Convert BSD to BIN\n");
|
|
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);
|
|
}
|
|
else
|
|
{
|
|
tmp->tm_sec = sec & 0x7F;
|
|
tmp->tm_min = min & 0x7F;
|
|
tmp->tm_hour = hour & 0x3F;
|
|
tmp->tm_mday = mday & 0x3F;
|
|
tmp->tm_mon = mon & 0x1F;
|
|
tmp->tm_year = year;
|
|
tmp->tm_wday = 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)
|
|
{
|
|
uchar save_ctrl_b;
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
|
|
#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
|
|
|
|
if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
|
|
{ /* Information is in BCD format */
|
|
year = bin2bcd(tmp->tm_year % 100);
|
|
mon = bin2bcd(tmp->tm_mon);
|
|
wday = bin2bcd(tmp->tm_wday);
|
|
mday = bin2bcd(tmp->tm_mday);
|
|
hour = bin2bcd(tmp->tm_hour);
|
|
min = bin2bcd(tmp->tm_min);
|
|
sec = bin2bcd(tmp->tm_sec);
|
|
}
|
|
else
|
|
{
|
|
year = tmp->tm_year % 100;
|
|
mon = tmp->tm_mon;
|
|
wday = tmp->tm_wday;
|
|
mday = tmp->tm_mday;
|
|
hour = tmp->tm_hour;
|
|
min = tmp->tm_min;
|
|
sec = tmp->tm_sec;
|
|
}
|
|
|
|
/* disables the RTC to update the regs */
|
|
save_ctrl_b = rtc_read(RTC_CONTROL_B);
|
|
save_ctrl_b |= RTC_CB_SET;
|
|
rtc_write(RTC_CONTROL_B, save_ctrl_b);
|
|
|
|
rtc_write (RTC_YEAR, year);
|
|
rtc_write (RTC_MONTH, mon);
|
|
rtc_write (RTC_DAY_OF_WEEK, wday);
|
|
rtc_write (RTC_DATE_OF_MONTH, mday);
|
|
rtc_write (RTC_HOURS, hour);
|
|
rtc_write (RTC_MINUTES, min);
|
|
rtc_write (RTC_SECONDS, sec);
|
|
|
|
/* enables the RTC to update the regs */
|
|
save_ctrl_b &= ~RTC_CB_SET;
|
|
rtc_write(RTC_CONTROL_B, save_ctrl_b);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
struct rtc_time tmp;
|
|
uchar ctrl_rg;
|
|
|
|
ctrl_rg = RTC_CB_SET;
|
|
rtc_write(RTC_CONTROL_B,ctrl_rg);
|
|
|
|
tmp.tm_year = 1970 % 100;
|
|
tmp.tm_mon = 1;
|
|
tmp.tm_mday= 1;
|
|
tmp.tm_hour = 0;
|
|
tmp.tm_min = 0;
|
|
tmp.tm_sec = 0;
|
|
|
|
#ifdef RTC_DEBUG
|
|
printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n",
|
|
tmp.tm_year, tmp.tm_mon, tmp.tm_mday,
|
|
tmp.tm_hour, tmp.tm_min, tmp.tm_sec);
|
|
#endif
|
|
|
|
ctrl_rg = RTC_CB_SET | RTC_CB_24_12 | RTC_CB_DM;
|
|
rtc_write(RTC_CONTROL_B,ctrl_rg);
|
|
rtc_set(&tmp);
|
|
|
|
rtc_write(RTC_HOURS_ALARM, 0),
|
|
rtc_write(RTC_MINUTES_ALARM, 0),
|
|
rtc_write(RTC_SECONDS_ALARM, 0);
|
|
|
|
ctrl_rg = RTC_CB_24_12 | RTC_CB_DM;
|
|
rtc_write(RTC_CONTROL_B,ctrl_rg);
|
|
}
|
|
|
|
#endif
|