56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
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* ADMBoot specific prom routines
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*
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* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <asm/addrspace.h>
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#include <asm/byteorder.h>
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#include <asm/mach-adm5120/adm5120_defs.h>
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#include <prom/admboot.h>
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#include "prom_read.h"
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#define ADMBOOT_MAGIC_MAC_BASE 0x636D676D /* 'mgmc' */
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#define ADMBOOT_MAGIC_MAC_BASE_BR6104XX 0x31305348 /* 'HS01' */
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int __init admboot_get_mac_base(u32 offset, u32 len, u8 *mac)
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{
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u8 *cfg;
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int i;
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cfg = (u8 *) KSEG1ADDR(ADM5120_SRAM0_BASE + offset);
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for (i = 0; i < len; i += 4) {
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u32 magic;
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magic = prom_read_le32(cfg + i);
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if (magic == ADMBOOT_MAGIC_MAC_BASE) {
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int j;
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for (j = 0; j < 6; j++)
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mac[j] = cfg[i + 4 + j];
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return 0;
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}
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if (magic == ADMBOOT_MAGIC_MAC_BASE_BR6104XX) {
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int j;
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for (j = 0; j < 6; j++)
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mac[j] = cfg[i + 7 + j];
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return 0;
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}
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}
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return -ENXIO;
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}
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