u-boot-imx/board/emk/common/vpd.c

/*
 * (C) Copyright 2003
 * Reinhard Meyer, EMK Elektronik GmbH, r.meyer@emk-elektronik.de
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>

/*****************************************************************************
 * read "factory" part of EEPROM and set some environment variables
 *****************************************************************************/
void read_factory_r (void)
{
	/* read 'factory' part of EEPROM */
	uchar buf[81];
	uchar *p;
	uint length;
	uint addr;
	uint len;

	/* get length first */
	addr = CONFIG_SYS_FACT_OFFSET;
	if (eeprom_read (CONFIG_SYS_I2C_FACT_ADDR, addr, buf, 2)) {
	  bailout:
		printf ("cannot read factory configuration\n");
		printf ("be sure to set ethaddr	yourself!\n");
		return;
	}
	length = buf[0] + (buf[1] << 8);
	addr += 2;

	/* sanity check */
	if (length < 20 || length > CONFIG_SYS_FACT_SIZE - 2)
		goto bailout;

	/* read lines */
	while (length > 0) {
		/* read one line */
		len = length > 80 ? 80 : length;
		if (eeprom_read (CONFIG_SYS_I2C_FACT_ADDR, addr, buf, len))
			goto bailout;
		/* mark end of buffer */
		buf[len] = 0;
		/* search end of line */
		for (p = buf; *p && *p != 0x0a; p++);
		if (!*p)
			goto bailout;
		*p++ = 0;
		/* advance to next line start */
		length -= p - buf;
		addr += p - buf;
		/*printf ("%s\n", buf); */
		/* search for our specific entry */
		if (!strncmp ((char *) buf, "[RLA/lan/Ethernet] ", 19)) {
			setenv ("ethaddr", (char *)(buf + 19));
		} else if (!strncmp ((char *) buf, "[BOARD/SERIAL] ", 15)) {
			setenv ("serial#", (char *)(buf + 15));
		} else if (!strncmp ((char *) buf, "[BOARD/TYPE] ", 13)) {
			setenv ("board_id", (char *)(buf + 13));
		}
	}
}