90 lines
2.1 KiB
C
90 lines
2.1 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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <mpc8xx.h>
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/*-----------------------------------------------------------------------
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* Process Hardware Information Block:
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*
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* If we boot on a system fresh from factory, check if the Hardware
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* Information Block exists and save the information it contains.
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*
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* The TQM8xxL / TQM82xx Hardware Information Block is defined as
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* follows:
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* - located in first flash bank
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* - starts at offset 0x0003FFC0
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* - size 0x00000040
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*
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* Internal structure:
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* - sequence of ASCII character strings
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* - fields separated by a single space character (0x20)
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* - last field terminated by NUL character (0x00)
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* - remaining space filled with NUL characters (0x00)
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*
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* Fields in Hardware Information Block:
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* 1) Module Type
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* 2) Serial Number
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* 3) First MAC Address
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* 4) Number of additional MAC addresses
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*/
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void load_sernum_ethaddr (void)
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{
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unsigned char *hwi;
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unsigned char serial [CONFIG_SYS_HWINFO_SIZE];
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unsigned char ethaddr[CONFIG_SYS_HWINFO_SIZE];
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unsigned short ih, is, ie, part;
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hwi = (unsigned char *)(CONFIG_SYS_FLASH_BASE + CONFIG_SYS_HWINFO_OFFSET);
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ih = is = ie = 0;
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if (*((unsigned long *)hwi) != (unsigned long)CONFIG_SYS_HWINFO_MAGIC) {
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return;
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}
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part = 1;
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/* copy serial # / MAC address */
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while ((hwi[ih] != '\0') && (ih < CONFIG_SYS_HWINFO_SIZE)) {
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if (hwi[ih] < ' ' || hwi[ih] > '~') { /* ASCII strings! */
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return;
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}
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switch (part) {
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default: /* Copy serial # */
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if (hwi[ih] == ' ') {
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++part;
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}
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serial[is++] = hwi[ih];
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break;
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case 3: /* Copy MAC address */
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if (hwi[ih] == ' ') {
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++part;
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break;
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}
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ethaddr[ie++] = hwi[ih];
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if ((ie % 3) == 2)
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ethaddr[ie++] = ':';
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break;
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}
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++ih;
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}
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serial[is] = '\0';
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if (ie && ethaddr[ie-1] == ':')
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--ie;
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ethaddr[ie] = '\0';
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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 ((char *)"serial#", (char *)serial);
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}
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if (getenv("ethaddr") == NULL) {
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setenv ((char *)"ethaddr", (char *)ethaddr);
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}
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}
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