mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-29 08:01:08 +00:00
113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/*
|
|
* (C) Copyright 2000, 2001, 2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* (C) Copyright 2005
|
|
* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/* #define DEBUG */
|
|
|
|
#include <common.h>
|
|
#include <net.h>
|
|
|
|
#define I2C_CHIP 0x50 /* I2C bus address of onboard EEPROM */
|
|
#define I2C_ALEN 1 /* length of EEPROM addresses in bytes */
|
|
#define I2C_OFFSET 0x0 /* start address of manufacturere data block
|
|
* in EEPROM */
|
|
|
|
/* 64 Byte manufacturer data block in EEPROM */
|
|
struct manufacturer_data {
|
|
unsigned int serial_number; /* serial number (0...999999) */
|
|
unsigned short hardware; /* hardware version (e.g. V1.02) */
|
|
unsigned short manuf_date; /* manufacture date (e.g. 25/02) */
|
|
unsigned char name[20]; /* device name (in CHIP.INI) */
|
|
unsigned char macadr[6]; /* MAC address */
|
|
signed char a_kal[4]; /* calibration value for U */
|
|
signed char i_kal[4]; /* calibration value for I */
|
|
unsigned char reserve[18]; /* reserved */
|
|
unsigned short save_nr; /* save count */
|
|
unsigned short chksum; /* checksum */
|
|
};
|
|
|
|
|
|
int i2c_read (unsigned char chip, unsigned int addr, int alen,
|
|
unsigned char *buffer, int len);
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Process manufacturer data block in EEPROM:
|
|
*
|
|
* If we boot on a system fresh from factory, check if the manufacturer data
|
|
* in the EEPROM is valid and save some information it contains.
|
|
*
|
|
* CMC manufacturer data is defined as follows:
|
|
*
|
|
* - located in the onboard EEPROM
|
|
* - starts at offset 0x0
|
|
* - size 0x00000040
|
|
*
|
|
* Internal structure: see struct definition
|
|
*/
|
|
|
|
int misc_init_r(void)
|
|
{
|
|
struct manufacturer_data data;
|
|
char serial [9];
|
|
unsigned short chksum;
|
|
unsigned char *p;
|
|
unsigned short i;
|
|
|
|
#if !defined(CONFIG_HARD_I2C) && !defined(CONFIG_SOFT_I2C)
|
|
#error you must define some I2C support (CONFIG_HARD_I2C or CONFIG_SOFT_I2C)
|
|
#endif
|
|
if (i2c_read(I2C_CHIP, I2C_OFFSET, I2C_ALEN, (unsigned char *)&data,
|
|
sizeof(data)) != 0) {
|
|
puts ("Error reading manufacturer data from EEPROM\n");
|
|
return -1;
|
|
}
|
|
|
|
/* check if manufacturer data block is valid */
|
|
p = (unsigned char *)&data;
|
|
chksum = 0;
|
|
for (i = 0; i < (sizeof(data) - sizeof(data.chksum)); i++)
|
|
chksum += *p++;
|
|
|
|
debug ("checksum of manufacturer data block: %#.4x\n", chksum);
|
|
|
|
if (chksum != data.chksum) {
|
|
puts ("Error: manufacturer data block has invalid checksum\n");
|
|
return -1;
|
|
}
|
|
|
|
/* copy serial number */
|
|
sprintf (serial, "%d", data.serial_number);
|
|
|
|
/* set serial# and ethaddr if not yet defined */
|
|
if (getenv("serial#") == NULL) {
|
|
setenv ("serial#", serial);
|
|
}
|
|
|
|
if (getenv("ethaddr") == NULL) {
|
|
eth_setenv_enetaddr("ethaddr", data.macadr);
|
|
}
|
|
|
|
return 0;
|
|
}
|