board/tqm8xx/load_sernum_ethaddr.c

   1 /*
   2  * (C) Copyright 2000, 2001, 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <mpc8xx.h>
  26
  27 /*-----------------------------------------------------------------------
  28  * Process Hardware Information Block:
  29  *
  30  * If we boot on a system fresh from factory, check if the Hardware
  31  * Information Block exists and save the information it contains.
  32  *
  33  * The TQM8xxL / TQM82xx Hardware Information Block is defined as
  34  * follows:
  35  * - located in first flash bank
  36  * - starts at offset 0x0003FFC0
  37  * - size 0x00000040
  38  *
  39  * Internal structure:
  40  * - sequence of ASCII character strings
  41  * - fields separated by a single space character (0x20)
  42  * - last field terminated by NUL character (0x00)
  43  * - remaining space filled with NUL characters (0x00)
  44  *
  45  * Fields in Hardware Information Block:
  46  * 1) Module Type
  47  * 2) Serial Number
  48  * 3) First MAC Address
  49  * 4) Number of additional MAC addresses
  50  */
  51
  52 void load_sernum_ethaddr (void)
  53 {
  54         unsigned char *hwi;
  55         unsigned char  serial [CFG_HWINFO_SIZE];
  56         unsigned char  ethaddr[CFG_HWINFO_SIZE];
  57         unsigned short ih, is, ie, part;
  58
  59         hwi = (unsigned char *)(CFG_FLASH_BASE + CFG_HWINFO_OFFSET);
  60         ih = is = ie = 0;
  61
  62         if (*((unsigned long *)hwi) != (unsigned long)CFG_HWINFO_MAGIC) {
  63                 return;
  64         }
  65
  66         part = 1;
  67
  68         /* copy serial # / MAC address */
  69         while ((hwi[ih] != '\0') && (ih < CFG_HWINFO_SIZE)) {
  70                 if (hwi[ih] < ' ' || hwi[ih] > '~') { /* ASCII strings! */
  71                         return;
  72                 }
  73                 switch (part) {
  74                 default:                /* Copy serial # */
  75                         if (hwi[ih] == ' ') {
  76                                 ++part;
  77                         }
  78                         serial[is++] = hwi[ih];
  79                         break;
  80                 case 3:                 /* Copy MAC address */
  81                         if (hwi[ih] == ' ') {
  82                                 ++part;
  83                                 break;
  84                         }
  85                         ethaddr[ie++] = hwi[ih];
  86                         if ((ie % 3) == 2)
  87                                 ethaddr[ie++] = ':';
  88                         break;
  89                 }
  90                 ++ih;
  91         }
  92         serial[is]  = '\0';
  93         if (ie && ethaddr[ie-1] == ':')
  94                 --ie;
  95         ethaddr[ie] = '\0';
  96
  97         /* set serial# and ethaddr if not yet defined */
  98         if (getenv("serial#") == NULL) {
  99                 setenv ((char *)"serial#", (char *)serial);
 100         }
 101
 102         if (getenv("ethaddr") == NULL) {
 103                 setenv ((char *)"ethaddr", (char *)ethaddr);
 104         }
 105 }