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#!/usr/bin/env sh

# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-License-Identifier: GPL-3.0-only

Fail(){
	if [ ! -z ${@+x} ]; then
		printf "\nERROR: ${@}\n"
	fi

	cat <<- EOF
	USAGE: ./blobutil inject -r [/path/to/rom] -b [boardname] -m [macaddress]
	Example: ./blobutil inject -r x230_12mb.rom -b x230_12mb

	Adding a macadress to the gbe is optional.
	If the [-m] parameter is left blank, the gbe will not be touched.

	Type './blobutil inject listboards' to get a list of valid boards
	EOF

	exit 1
}

Modify_gbe(){
	printf "changing mac address in gbe to ${new_mac}\n"
	_gbe_location=${CONFIG_GBE_BIN_PATH#../../}

	if [ ! -f util/nvmutil/nvm ]; then
		make -C util/nvmutil || Fail 'failed to build nvmutil'
	fi

	_gbe_tmp=$(mktemp -t gbeXXXX.bin)
	cp ${_gbe_location} ${_gbe_tmp}
	./util/nvmutil/nvm ${_gbe_tmp} setmac ${new_mac} || Fail 'failed to modify mac address\nmake sure the mac address in the correct format'
	
	./coreboot/default/util/ifdtool/ifdtool -i GbE:${_gbe_tmp} ${rom} -O ${rom} || exit 1

	rm ${_gbe_tmp}
}

listboards() {
	for boarddir in resources/coreboot/*; do
		if [ ! -d "${boarddir}" ]; then continue; fi
		board="${boarddir##resources/coreboot/}"
		board="${board%/}"
		printf '%s\n' "${board##*/}"
	done
}

# This function tries to determine the board from the filename of the rom.
# It will only succeed if the filename is not changed from the build/download
Detect_board(){
	filename=$(basename ${rom})
	case ${filename} in
		grub_*)
		board=$(echo "${filename}" | cut -d '_' -f2-3)
		;;
		seabios_withgrub_*)
		board=$(echo "${filename}" | cut -d '_' -f3-4)
		;;
		*)
		return 1
	esac	

	if [ -d "resources/coreboot/${board}/" ]; then
		printf '%s\n' "${board}"
	else
		return 1
	fi
}

Patch(){
set -- "resources/coreboot/${board}/config/*"
. ${1} 2>/dev/null
. "resources/coreboot/${board}/board.cfg"

	if [ "$CONFIG_HAVE_MRC" = "y" ]; then
		printf 'adding mrc\n'
		./coreboot/default/util/cbfstool/cbfstool ${rom} add -f mrc/haswell/mrc.bin -n mrc.bin -t mrc || exit 1
	fi

	if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
		_me_location=${CONFIG_ME_BIN_PATH#../../}
		printf 'adding intel management engine\n'
		./coreboot/default/util/ifdtool/ifdtool -i me:${_me_location} ${rom} -O ${rom} || exit 1
	fi

	if [ "${modifygbe}" = "true" ]; then
		Modify_gbe
	fi
}

if [ "${1}" = "listboards" ]; then
	listboards
	exit 0
fi

# Implementing parameter parsing now so more options can be added later
while getopts r:b:m: option
do 
    case "${option}"
        in
        r)rom=${OPTARG};;
	b)board=${OPTARG};;
	m)
		modifygbe=true
		new_mac=${OPTARG}
		;;
    esac
done

if [ -z ${rom+x} ]; then
	Fail 'no rom specified'
elif [ ! -f "${rom}" ]; then
	Fail "${rom} is not a valid path"
elif [ -z ${board+x} ]; then
	board=$(Detect_board) || \
	Fail 'no board specified'
fi

if [ ! -d "resources/coreboot/${board}/" ]; then
	Fail "board ${board} not found"
fi

if [ ! -d coreboot/default ]; then
	printf "downloading coreboot\n"
	./download coreboot default
fi

if [ ! -f "coreboot/default/util/ifdtool/ifdtool" ]; then
printf "building ifdtool from coreboot\n"
	./build module cbutils default || Fail 'could not build ifdtool'
fi

if [ ! -f "coreboot/default/util/cbfstool/cbfstool" ]; then
printf "building cbfstool from coreboot\n"
./build module cbutils default || Fail 'could not build cbfstool'
fi

./blobutil download ${board} && Patch