182 lines
3.6 KiB
C
182 lines
3.6 KiB
C
/*
|
|
* (C) Copyright 2001
|
|
* Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
|
|
*
|
|
* 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
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/io.h>
|
|
|
|
#define EEPROM_CAP 0x50000358
|
|
#define EEPROM_DATA 0x5000035c
|
|
|
|
|
|
unsigned int eepromReadLong(int offs)
|
|
{
|
|
unsigned int value;
|
|
unsigned short ret;
|
|
int count;
|
|
|
|
out_be16((void *)EEPROM_CAP, offs);
|
|
|
|
count = 0;
|
|
|
|
for (;;)
|
|
{
|
|
count++;
|
|
ret = in_be16((void *)EEPROM_CAP);
|
|
|
|
if ((ret & 0x8000) != 0)
|
|
break;
|
|
}
|
|
|
|
value = in_be32((void *)EEPROM_DATA);
|
|
|
|
return value;
|
|
}
|
|
|
|
|
|
unsigned char eepromReadByte(int offs)
|
|
{
|
|
unsigned int valueLong;
|
|
unsigned char *ptr;
|
|
|
|
valueLong = eepromReadLong(offs & ~3);
|
|
ptr = (unsigned char *)&valueLong;
|
|
|
|
return ptr[offs & 3];
|
|
}
|
|
|
|
|
|
void eepromWriteLong(int offs, unsigned int value)
|
|
{
|
|
unsigned short ret;
|
|
int count;
|
|
|
|
count = 0;
|
|
|
|
out_be32((void *)EEPROM_DATA, value);
|
|
out_be16((void *)EEPROM_CAP, 0x8000 + offs);
|
|
|
|
for (;;)
|
|
{
|
|
count++;
|
|
ret = in_be16((void *)EEPROM_CAP);
|
|
|
|
if ((ret & 0x8000) == 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void eepromWriteByte(int offs, unsigned char valueByte)
|
|
{
|
|
unsigned int valueLong;
|
|
unsigned char *ptr;
|
|
|
|
valueLong = eepromReadLong(offs & ~3);
|
|
ptr = (unsigned char *)&valueLong;
|
|
|
|
ptr[offs & 3] = valueByte;
|
|
|
|
eepromWriteLong(offs & ~3, valueLong);
|
|
}
|
|
|
|
|
|
void i2c_read (uchar *addr, int alen, uchar *buffer, int len)
|
|
{
|
|
int i;
|
|
int len2, ptr;
|
|
|
|
/* printf("\naddr=%x alen=%x buffer=%x len=%x", addr[0], addr[1], *(short *)addr, alen, buffer, len); /###* test-only */
|
|
|
|
ptr = *(short *)addr;
|
|
|
|
/*
|
|
* Read till lword boundary
|
|
*/
|
|
len2 = 4 - (*(short *)addr & 0x0003);
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
*buffer++ = eepromReadByte(ptr++);
|
|
}
|
|
|
|
/*
|
|
* Read all lwords
|
|
*/
|
|
len2 = (len - len2) >> 2;
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
*(unsigned int *)buffer = eepromReadLong(ptr);
|
|
buffer += 4;
|
|
ptr += 4;
|
|
}
|
|
|
|
/*
|
|
* Read last bytes
|
|
*/
|
|
len2 = (*(short *)addr + len) & 0x0003;
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
*buffer++ = eepromReadByte(ptr++);
|
|
}
|
|
}
|
|
|
|
void i2c_write (uchar *addr, int alen, uchar *buffer, int len)
|
|
{
|
|
int i;
|
|
int len2, ptr;
|
|
|
|
/* printf("\naddr=%x alen=%x buffer=%x len=%x", addr[0], addr[1], *(short *)addr, alen, buffer, len); /###* test-only */
|
|
|
|
ptr = *(short *)addr;
|
|
|
|
/*
|
|
* Write till lword boundary
|
|
*/
|
|
len2 = 4 - (*(short *)addr & 0x0003);
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
eepromWriteByte(ptr++, *buffer++);
|
|
}
|
|
|
|
/*
|
|
* Write all lwords
|
|
*/
|
|
len2 = (len - len2) >> 2;
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
eepromWriteLong(ptr, *(unsigned int *)buffer);
|
|
buffer += 4;
|
|
ptr += 4;
|
|
}
|
|
|
|
/*
|
|
* Write last bytes
|
|
*/
|
|
len2 = (*(short *)addr + len) & 0x0003;
|
|
for (i=0; i<len2; i++)
|
|
{
|
|
eepromWriteByte(ptr++, *buffer++);
|
|
}
|
|
}
|