/*
 *  $Id$
 *
 *  Compex's MyLoader specific prom routines
 *
 *  Copyright (C) 2007 OpenWrt.org
 *  Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the
 *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA  02110-1301, USA.
 */

#include <linux/types.h>
#include <linux/autoconf.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>

#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/byteorder.h>

#include <adm5120_defs.h>
#include <prom/myloader.h>
#include "prom_read.h"

#define SYS_PARAMS_ADDR		KSEG1ADDR(ADM5120_SRAM0_BASE+0x0F000)
#define BOARD_PARAMS_ADDR	KSEG1ADDR(ADM5120_SRAM0_BASE+0x0F800)
#define PART_TABLE_ADDR		KSEG1ADDR(ADM5120_SRAM0_BASE+0x10000)

static int myloader_found;

struct myloader_info myloader_info;

int __init myloader_present(void)
{
	struct mylo_system_params *sysp;
	struct mylo_board_params *boardp;
	struct mylo_partition_table *parts;

	if (myloader_found)
		goto out;

	sysp = (struct mylo_system_params *)(SYS_PARAMS_ADDR);
	boardp = (struct mylo_board_params *)(BOARD_PARAMS_ADDR);
	parts = (struct mylo_partition_table *)(PART_TABLE_ADDR);

	/* Check for some magic numbers */
	if ((le32_to_cpu(sysp->magic) != MYLO_MAGIC_SYS_PARAMS) ||
	   (le32_to_cpu(boardp->magic) != MYLO_MAGIC_BOARD_PARAMS) ||
	   (le32_to_cpu(parts->magic) != MYLO_MAGIC_PARTITIONS))
		goto out;

	myloader_info.vid = le32_to_cpu(sysp->vid);
	myloader_info.did = le32_to_cpu(sysp->did);
	myloader_info.svid = le32_to_cpu(sysp->svid);
	myloader_info.sdid = le32_to_cpu(sysp->sdid);

	myloader_found = 1;

out:
	return myloader_found;
}