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#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-only
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>

. "include/err.sh"
. "include/option.sh"

nvmutil="util/nvmutil/nvm"

eval "$(setvars "" archive rom modifygbe nukemode release new_mac)"

main()
{
	[ $# -lt 1 ] && err "No options specified."
	if [ "${1}" = "listboards" ]; then
		items config/coreboot || :
		exit 0
	fi

	archive="${1}"

	while getopts n:r:b:m: option; do
		case "${option}" in
		n) nukemode="${OPTARG}" ;;
		r) rom=${OPTARG} ;;
		b) board=${OPTARG} ;;
		m) modifygbe=true
		   new_mac=${OPTARG} ;;
		*) : ;;
		esac
	done

	check_board
	build_dependencies
	inject_vendorfiles
	[ "${nukemode}" = "nuke" ] && return 0
	printf "Friendly reminder (this is *not* an error message):\n"
	printf "Please always ensure that the files were inserted correctly.\n"
}

check_board()
{
	failcheck="n"
	check_release "${archive}" || failcheck="y"
	if [ "${failcheck}" = "y" ]; then
		[ -f "${rom}" ] || \
			err "check_board: \"${rom}\" is not a valid path"
		[ -z "${rom+x}" ] && \
			err "check_board: no rom specified"
		[ -n "${board+x}" ] || \
			board=$(detect_board "${rom}")
	else
		release="y"
		board=$(detect_board "${archive}")
	fi

	boarddir="${cbcfgsdir}/${board}"
	[ -d "${boarddir}" ] && return 0
	err "check_board: board ${board} not found"
}

check_release()
{
	[ -f "${archive}" ] || return 1
	[ "${archive##*.}" = "xz" ] || return 1
	printf "%s\n" "Release archive ${archive} detected"
}

# 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()
{
	path="${1}"
	filename=$(basename "${path}")
	case ${filename} in
	grub_*)
		board=$(echo "${filename}" | cut -d '_' -f2-3) ;;
	seabios_withgrub_*)
		board=$(echo "${filename}" | cut -d '_' -f3-4) ;;
	*.tar.xz)
		_stripped_prefix=${filename#*_}
		board="${_stripped_prefix%.tar.xz}" ;;
	*)
		err "detect_board $filename: could not detect board type"
	esac	
	[ -d "${boarddir}/" ] || \
		err "detect_board: dir, ${boarddir}, doesn't exist"
	printf "%s\n" "${board}"
}

build_dependencies()
{
	[ -d "${cbdir}" ] || x_ ./update trees -f coreboot default
	if [ ! -f "${cbfstool}" ] || [ ! -f "${ifdtool}" ]; then
		x_ ./update trees -b coreboot utils default
	fi
	[ -z "${new_mac}" ] || [ -f "${nvmutil}" ] || x_ make -C util/nvmutil
	[ "${nukemode}" = "nuke" ] && return 0
	x_ ./vendor download ${board}
}

inject_vendorfiles()
{
	if [ "${release}" != "y" ]; then
		patch_rom "${rom}"
		return 0
	fi
	printf "patching release images\n"
	patch_release_roms
}

patch_release_roms()
{
	_tmpdir="tmp/romdir"
	remkdir "${_tmpdir}"
	tar -xf "${archive}" -C "${_tmpdir}" || \
	    err "patch_release_roms: !tar -xf \"${archive}\" -C \"${_tmpdir}\""

	for x in "${_tmpdir}"/bin/*/*.rom ; do
		printf "patching rom: %s\n" "$x"
		patch_rom "${x}"
	done

	(
	x_ cd "${_tmpdir}/bin/"* # TODO: very dodgy, re-write accordingly

	# NOTE: For compatibility with older rom releases, defer to sha1
	[ "${nukemode}" = "nuke" ] || sha512sum --status -c vendorhashes || \
	    sha1sum --status -c vendorhashes || sha512sum --status -c \
	    blobhashes || sha1sum --status -c blobhashes || \
	    err "patch_release_roms: ROMs did not match expected hashes"
	) || err "can't verify vendor hashes"

	if [ "${modifygbe}" = "true" ]; then
		for x in "${_tmpdir}"/bin/*/*.rom ; do
			modify_gbe "${x}"
		done
	fi

	[ -d bin/release ] || x_ mkdir -p bin/release
	x_ mv "${_tmpdir}"/bin/* bin/release/

	printf "Success! Your ROMs are in bin/release\n"

	x_ rm -Rf "${_tmpdir}"
}

patch_rom()
{
	rom="${1}"

	check_defconfig "$boarddir" && err "patch_rom $boarddir: no configs"

	set -- "${boarddir}/config/"*
	. "${1}" 2>/dev/null

	[ "$CONFIG_HAVE_MRC" = "y" ] && \
		inject "mrc.bin" "${CONFIG_MRC_FILE}" "mrc" "0xfffa0000"
	[ "${CONFIG_HAVE_ME_BIN}" = "y" ] && \
		inject "IFD" "${CONFIG_ME_BIN_PATH}" "me"
	[ "${CONFIG_KBC1126_FIRMWARE}" = "y" ] && \
		inject "ecfw1.bin" "$CONFIG_KBC1126_FW1" "raw" \
		    "${CONFIG_KBC1126_FW1_OFFSET}" && \
		inject "ecfw2.bin" "$CONFIG_KBC1126_FW2" "raw" \
		    "${CONFIG_KBC1126_FW2_OFFSET}"
	[ -n "$CONFIG_VGA_BIOS_FILE" ] && [ -n "$CONFIG_VGA_BIOS_ID" ] && \
		inject "pci${CONFIG_VGA_BIOS_ID}.rom" \
		    "${CONFIG_VGA_BIOS_FILE}" "optionrom"
	[ "${CONFIG_INCLUDE_SMSC_SCH5545_EC_FW}" = "y" ] && \
	    [ -n "${CONFIG_SMSC_SCH5545_EC_FW_FILE}" ] && \
		inject "sch5545_ecfw.bin" "$CONFIG_SMSC_SCH5545_EC_FW_FILE" raw
	[ "${modifygbe}" = "true" ] && ! [ "${release}" = "y" ] && \
		inject "IFD" "${CONFIG_GBE_BIN_PATH}" "GbE"

	printf "ROM image successfully patched: %s\n" "${rom}"
}

inject()
{
	[ $# -lt 3 ] && \
		err "inject $@, $rom: usage: inject name path type (offset)"

	eval "$(setvars "" cbfsname _dest _t _offset)"
	cbfsname="${1}"
	_dest="${2##*../}"
	_t="${3}"
	[ $# -gt 3 ] && _offset="-b ${4}" && [ -z "${4}" ] && \
	    err "inject $@, $rom: offset passed, but empty (not defined)"

	[ -z "${_dest}" ] && err "inject $@, ${rom}: empty destination path"
	[ ! -f "${_dest}" ] && [ "${nukemode}" != "nuke" ] && \
		err "inject_${dl_type}: file missing, ${_dest}"

	[ "$nukemode" = "nuke" ] || \
		printf "Inserting %s/%s into file: %s\n" \
		    "${cbfsname}" "${_t}" "$rom"

	if [ "${_t}" = "GbE" ]; then
		x_ mkdir -p tmp
		cp "${_dest}" "tmp/gbe.bin" || \
		    err "inject: !cp \"${_dest}\" \"tmp/gbe.bin\""
		_dest="tmp/gbe.bin"
		"${nvmutil}" "${_dest}" setmac "${new_mac}" || \
		    err "inject ${_dest}: can't change mac address"
	fi
	if [ "${cbfsname}" = "IFD" ]; then
		if [ "${nukemode}" != "nuke" ]; then
			"${ifdtool}" -i ${_t}:${_dest} "${rom}" -O "$rom" || \
			    err "inject: can't insert $_t ($dest) into $rom"
		else
			"${ifdtool}" --nuke ${_t} "${rom}" -O "${rom}" || \
			    err "inject ${rom}: can't nuke ${_t} in IFD"
		fi
	else
		if [ "${nukemode}" != "nuke" ]; then
			"${cbfstool}" "${rom}" add -f "${_dest}" \
			    -n "${cbfsname}" -t ${_t} ${_offset} || \
			    err "inject $rom: can't insert $_t file $_dest"
		else
			"${cbfstool}" "${rom}" remove -n "${cbfsname}" || \
			    err "inject $rom: can't remove ${cbfsname}"
		fi

	fi
}

usage()
{
	cat <<- EOF
	USAGE: ./vendor inject -r [rom path] -b [boardname] -m [macaddress]
	Example: ./vendor 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 './vendor inject listboards' to get a list of valid boards
	EOF
}

main $@