arch/blackfin/mach-bf537/boards/eth_mac.c

   1 /*
   2  *  arch/blackfin/mach-bf537/board/eth_mac.c
   3  *
   4  *  Copyright (C) 2007 Analog Devices, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <linux/module.h>
  21 #include <asm/blackfin.h>
  22
  23 #if     defined(CONFIG_GENERIC_BOARD) \
  24         || defined(CONFIG_BFIN537_STAMP)
  25
  26 /*
  27  * Currently the MAC address is saved in Flash by U-Boot
  28  */
  29 #define FLASH_MAC       0x203f0000
  30
  31 void get_bf537_ether_addr(char *addr)
  32 {
  33         unsigned int flash_mac = (unsigned int) FLASH_MAC;
  34         *(u32 *)(&(addr[0])) = bfin_read32(flash_mac);
  35         flash_mac += 4;
  36         *(u16 *)(&(addr[4])) = bfin_read16(flash_mac);
  37 }
  38
  39 #else
  40
  41 /*
  42  * Provide MAC address function for other specific board setting
  43  */
  44 void get_bf537_ether_addr(char *addr)
  45 {
  46         printk(KERN_WARNING "%s: No valid Ethernet MAC address found\n",__FILE__);
  47 }
  48
  49 #endif
  50
  51 EXPORT_SYMBOL(get_bf537_ether_addr);