board/trizepsiv/eeprom.c

   1 /*
   2  * (C) Copyright 2007
   3  * Stefano Babic, DENX Software Engineering, sbabic@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 <command.h>
  26
  27 extern u16 read_srom_word(int);
  28 extern void write_srom_word(int offset, u16 val);
  29
  30 static int do_read_dm9000_eeprom ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) {
  31         int i;
  32
  33         for (i=0; i < 0x40; i++) {
  34                 if (!(i % 0x10))
  35                         printf("\n%08lx:", i);
  36                 printf(" %04x", read_srom_word(i));
  37         }
  38         printf ("\n");
  39         return (0);
  40 }
  41
  42 static int do_write_dm9000_eeprom ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) {
  43         int offset,value;
  44
  45         if (argc < 4) {
  46                 cmd_usage(cmdtp);
  47                 return 1;
  48         }
  49
  50         offset=simple_strtoul(argv[2],NULL,16);
  51         value=simple_strtoul(argv[3],NULL,16);
  52         if (offset > 0x40) {
  53                 printf("Wrong offset : 0x%x\n",offset);
  54                 cmd_usage(cmdtp);
  55                 return 1;
  56         }
  57         write_srom_word(offset, value);
  58         return (0);
  59 }
  60
  61 int do_dm9000_eeprom ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) {
  62         if (argc < 2) {
  63                 cmd_usage(cmdtp);
  64                 return 1;
  65         }
  66
  67         if (strcmp (argv[1],"read") == 0) {
  68                 return (do_read_dm9000_eeprom(cmdtp,flag,argc,argv));
  69         } else if (strcmp (argv[1],"write") == 0) {
  70                 return (do_write_dm9000_eeprom(cmdtp,flag,argc,argv));
  71         } else {
  72                 cmd_usage(cmdtp);
  73                 return 1;
  74         }
  75 }
  76
  77 U_BOOT_CMD(
  78         dm9000ee,4,1,do_dm9000_eeprom,
  79         "dm9000ee- Read/Write eeprom connected to Ethernet Controller\n",
  80         "\ndm9000ee write <word offset> <value> \n"
  81         "\tdm9000ee read \n"
  82         "\tword:\t\t00-02 : MAC Address\n"
  83         "\t\t\t03-07 : DM9000 Configuration\n"
  84         "\t\t\t08-63 : User data\n");