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/*
* Mikrotik's RouterBOOT specific prom routines
*
* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/module.h>
#include <linux/routerboot.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/mach-adm5120/adm5120_defs.h>
#include <prom/routerboot.h>
#include "prom_read.h"
struct rb_hard_settings rb_hs;
static int rb_found;
static int __init routerboot_load_hs(u8 *buf, u16 buflen)
{
u16 id, len;
memset(&rb_hs, 0, sizeof(rb_hs));
if (buflen < 4)
return -1;
if (prom_read_le32(buf) != RB_MAGIC_HARD)
return -1;
/* skip magic value */
buf += 4;
buflen -= 4;
while (buflen > 2) {
id = prom_read_le16(buf);
buf += 2;
buflen -= 2;
if (id == RB_ID_TERMINATOR || buflen < 2)
break;
len = prom_read_le16(buf);
buf += 2;
buflen -= 2;
if (buflen < len)
break;
switch (id) {
case RB_ID_BIOS_VERSION:
rb_hs.bios_ver = (char *)buf;
break;
case RB_ID_BOARD_NAME:
rb_hs.name = (char *)buf;
break;
case RB_ID_MEMORY_SIZE:
rb_hs.mem_size = prom_read_le32(buf);
break;
case RB_ID_MAC_ADDRESS_COUNT:
rb_hs.mac_count = prom_read_le32(buf);
break;
case RB_ID_MAC_ADDRESS_PACK:
if ((len / RB_MAC_SIZE) > 0)
rb_hs.mac_base = buf;
break;
}
buf += len;
buflen -= len;
}
return 0;
}
#define RB_BS_OFFS 0x14
#define RB_OFFS_MAX (128*1024)
int __init routerboot_present(void)
{
struct rb_bios_settings *bs;
u8 *base;
u32 off, len;
if (rb_found)
goto out;
base = (u8 *)KSEG1ADDR(ADM5120_SRAM0_BASE);
bs = (struct rb_bios_settings *)(base + RB_BS_OFFS);
off = prom_read_le32(&bs->hs_offs);
len = prom_read_le32(&bs->hs_size);
if (off > RB_OFFS_MAX)
goto out;
if (routerboot_load_hs(base+off, len) != 0)
goto out;
rb_found = 1;
out:
return rb_found;
}
char *routerboot_get_boardname(void)
{
if (rb_found == 0)
return NULL;
return rb_hs.name;
}
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