mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-07 10:43:47 +09:00
92b50ffef9
The environment is the canonical storage location of the mac address, so we're killing off the global data location and moving everything to querying the env directly. Also rename load_sernum_ethaddr() to misc_init_r() so we don't need to handle this board specially in common ARM code. Signed-off-by: Mike Frysinger <vapier@gentoo.org> CC: Ben Warren <biggerbadderben@gmail.com>
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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* (C) Copyright 2000, 2001, 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2005
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* Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#include <common.h>
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#define I2C_CHIP 0x50 /* I2C bus address of onboard EEPROM */
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#define I2C_ALEN 1 /* length of EEPROM addresses in bytes */
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#define I2C_OFFSET 0x0 /* start address of manufacturere data block
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* in EEPROM */
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/* 64 Byte manufacturer data block in EEPROM */
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struct manufacturer_data {
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unsigned int serial_number; /* serial number (0...999999) */
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unsigned short hardware; /* hardware version (e.g. V1.02) */
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unsigned short manuf_date; /* manufacture date (e.g. 25/02) */
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unsigned char name[20]; /* device name (in CHIP.INI) */
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unsigned char macadr[6]; /* MAC address */
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signed char a_kal[4]; /* calibration value for U */
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signed char i_kal[4]; /* calibration value for I */
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unsigned char reserve[18]; /* reserved */
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unsigned short save_nr; /* save count */
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unsigned short chksum; /* checksum */
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};
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int i2c_read (unsigned char chip, unsigned int addr, int alen,
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unsigned char *buffer, int len);
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/*-----------------------------------------------------------------------
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* Process manufacturer data block in EEPROM:
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*
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* If we boot on a system fresh from factory, check if the manufacturer data
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* in the EEPROM is valid and save some information it contains.
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*
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* CMC manufacturer data is defined as follows:
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*
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* - located in the onboard EEPROM
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* - starts at offset 0x0
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* - size 0x00000040
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*
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* Internal structure: see struct definition
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*/
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void misc_init_r(void)
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{
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struct manufacturer_data data;
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char serial [9];
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unsigned short chksum;
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unsigned char *p;
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unsigned short i;
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#if !defined(CONFIG_HARD_I2C) && !defined(CONFIG_SOFT_I2C)
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#error you must define some I2C support (CONFIG_HARD_I2C or CONFIG_SOFT_I2C)
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#endif
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if (i2c_read(I2C_CHIP, I2C_OFFSET, I2C_ALEN, (unsigned char *)&data,
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sizeof(data)) != 0) {
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puts ("Error reading manufacturer data from EEPROM\n");
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return;
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}
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/* check if manufacturer data block is valid */
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p = (unsigned char *)&data;
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chksum = 0;
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for (i = 0; i < (sizeof(data) - sizeof(data.chksum)); i++)
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chksum += *p++;
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debug ("checksum of manufacturer data block: %#.4x\n", chksum);
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if (chksum != data.chksum) {
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puts ("Error: manufacturer data block has invalid checksum\n");
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return;
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}
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/* copy serial number */
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sprintf (serial, "%d", data.serial_number);
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/* set serial# and ethaddr if not yet defined */
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if (getenv("serial#") == NULL) {
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setenv ("serial#", serial);
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}
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if (getenv("ethaddr") == NULL) {
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eth_setenv_enetaddr("ethaddr", data.macadr);
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}
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}
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