#!/bin/bash

#  ich9macchange script: uses ich9gen to change the MAC address on GM45/GS45 machines.
#
#	Copyright (C) 2014, 2015 Francis Rowe <info@gluglug.org.uk>
#
#    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 3 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, see <http://www.gnu.org/licenses/>.
#

set -u -e -v

arch="unknown"
if [ $(uname -i) = "i686" ] || [ $(uname -m) = "i686" ]; then
	arch="i686"
elif [ $(uname -i) = "x86_64" ] || [ $(uname -m) = "x86_64" ]; then
	arch="x86_64"
elif [ $(uname -i) = "armv7l" ] || [ $(uname -m) = "armv7l" ]; then
	arch="armv7l"
else
	echo "This script must be run on an i686, x86_64 or armv7l host."
	exit 1
fi

if (( $# != 3 )); then
	echo "Usage: ./ich9macchange path/to/ich9libreboot.rom XX:XX:XX:XX:XX:XX romsize"
	echo "'romsize' is a number in MiB. Example: 8"
	echo "(XX replaced with hex from your desired MAC address)"
	exit 1
fi
rompath=$1
macaddress=$2
romsize=$3

if [ ! -f "$rompath" ]; then
	echo "ich9macchange: ROM image specified not found."
	exit 1
fi
if [ "$romsize" != "8" ]; then
	if [ "$3" != "4" ]; then
		echo "Invalid ROM size specified. It must be 4 or 8."
		exit 1
	fi
fi

./ich9deblob/$arch/ich9gen --macaddress $macaddress

dd if=ich9fdgbe_"$romsize"m.bin of="$rompath" bs=1 count=12k conv=notrunc

rm -f ich9fdgbe_4m.bin
rm -f ich9fdgbe_8m.bin
rm -f mkgbe.c
rm -f mkgbe.h