#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright (c) 2014-2016,2020-2021,2023-2024 Leah Rowe <leah@libreboot.org>
# Copyright (c) 2021-2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# Copyright (c) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# Copyright (c) 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
# Copyright (c) 2023 Riku Viitanen <riku.viitanen@protonmail.com>

set -u -e

. "include/lib.sh"

seavgabiosrom="elf/seabios/default/libgfxinit/vgabios.bin"
grub_background="background1280x800.png"
grubelf="elf/grub/grub.elf"
cfgsdir="config/coreboot"
picosrc="src/pico-serprog"
picosdk="src/pico-sdk"
stm32src="src/stm32-vserprog"

# Disable all payloads by default.
# target.cfg files have to specifically enable [a] payload(s)
pv="payload_uboot payload_grub_withseabios payload_seabios payload_memtest t"
pv="$pv payload_seabios_withgrub payload_seabios_grubonly payload_grub mt86bin"
v="romdir cbrom initmode displaymode cbcfg targetdir tree keymaps release"
v="$v grub_timeout ubdir board grub_scan_disk uboot_config"
eval "$(setvars "n" $pv serprog)"
eval "$(setvars "" $v boards _displaymode _payload _keyboard all targets \
    serprog_boards_dir)"

main()
{
	while [ $# -gt 0 ]; do
		case "$1" in
		list) x_ items config/coreboot; return 0 ;;
		serprog) serprog="y"; shift 1; break ;;
		-d) _displaymode="$2" ;;
		-p) _payload="$2" ;;
		-k) _keyboard="$2" ;;
		*)
			[ "$1" = "all" ] && all="y"
			boards="$1 $boards"
			shift && continue ;;
		esac
		shift 2
	done

	if [ "$serprog" = "y" ]; then
		handle_serprog $@; return 0
	else
		[ "$all" != "y" ] || boards="$(items config/coreboot)" || \
			$err "Cannot generate list of boards for building"
		for x in $boards; do
			[ -d "config/coreboot/$x/config" ] && \
				handle_coreboot_target "$x"; continue
		done
	fi

	x="directories"
	[ "$xbmk_release" = "y" ] && x="archives"

	[ -z "$targets" ] && $err "No ROM images were compiled"
	printf "\nROM images available in these %s:\n" "$x"
	eval "printf \"$targets\""
	printf "^^ ROM images available in these %s.\n\n" "$x"

	printf "DO NOT flash images from elf/ - please use bin/ instead.\n"
}

handle_serprog()
{
	[ -z "${1+x}" ] && $err "bad command. Check $projectname docs."
	[ "$1" != "rp2040" ] && [ "$1" != "stm32" ] && $err "bad command"
	if [ "$1" = "rp2040" ]; then
		serprog_boards_dir="$picosdk/src/boards/include/boards"
		[ -d "$picosrc" ] || x_ ./update trees -f "pico-serprog"
	elif [ "$1" = "stm32" ]; then
		serprog_boards_dir="$stm32src/boards"
		[ -d "$stm32src" ] || x_ ./update trees -f "stm32-vserprog"
	fi
	x_ mkdir -p "bin/serprog_$1"

	if [ $# -gt 1 ] && [ "$2" = "list" ]; then
		list_serprog_boards "$serprog_boards_dir"
		return 0
	elif [ $# -gt 1 ]; then
		build_${1}_rom "$2"
	else
		list_serprog_boards "$serprog_boards_dir" | \
			while read -r board; do
				build_${1}_rom "$board"
			done
	fi

	[ "$xbmk_release" = "y" ] && mkrom_tarball "bin/serprog_$1"; return 0
}

build_rp2040_rom()
{
	board="$1"
	printf "Building pico-serprog for %s\n" "$board"
	x_ cmake -DPICO_BOARD="$board" -DPICO_SDK_PATH="$picosdk" \
	    -B "$picosrc/build" "$picosrc"
	x_ cmake --build "$picosrc/build"
	x_ mv "$picosrc/build/pico_serprog.uf2" \
	   "bin/serprog_rp2040/serprog_$board.uf2"
	printf "output to bin/serprog_rp2040/serprog_%s.uf2\n" "$board"
}

build_stm32_rom()
{
	board="$1"
	printf "Building stm32-vserprog for %s\n" "$board"
	x_ make -C "$stm32src" libopencm3-just-make BOARD=$board
	x_ make -C "$stm32src" BOARD=$board
	x_ mv "$stm32src/stm32-vserprog.hex" \
	   "bin/serprog_stm32/serprog_$board.hex"
	printf "output to bin/serprog_stm32/serprog_%s.hex\n" "$board"
}

list_serprog_boards()
{
	basename -a -s .h "$1/"*.h || $err "$1: can't list boards"
}

handle_coreboot_target()
{
	eval "$(setvars "n" $pv) $(setvars "" $v)"
	grub_background="background1280x800.png"
	board="$1"

	configure_target
	[ "$board" = "$tree" ] && return 0
	[ "$xbmk_release" = "y" ] && [ "$release" = "n" ] && return 0

	build_payloads
	build_target_mainboard

	[ -d "bin/$board" ] || return 0
	[ "$xbmk_release" = "y" ] || targets="* bin/$board\n$targets"
	[ "$xbmk_release" = "y" ] && mkrom_tarball "bin/$board" && \
	    targets="* bin/${relname}_$board.tar.xz\n$targets"; return 0
}

configure_target()
{
	targetdir="$cfgsdir/$board"
	[ -f "$targetdir/target.cfg" ] || $err "$board: target.cfg missing"

	# Override the above defaults using target.cfg
	. "$targetdir/target.cfg"

	[ -z "$grub_scan_disk" ] && grub_scan_disk="both"
	[ "$grub_scan_disk" != "both" ] && [ "$grub_scan_disk" != "ata" ] && \
	    [ "$grub_scan_disk" != "ahci" ] && grub_scan_disk="both"

	[ -z "$tree" ] && $err "$board: tree not defined"

	[ "$payload_memtest" != "y" ] && payload_memtest="n"
	[ "$(uname -m)" = "x86_64" ] || payload_memtest="n"

	[ "$payload_grub_withseabios" = "y" ] && payload_grub="y"
	[ "$payload_grub_withseabios" = "y" ] && \
		eval "$(setvars "y" payload_seabios payload_seabios_withgrub)"
	[ "$payload_seabios_withgrub" = "y" ] && payload_seabios="y"
	[ "$payload_seabios_grubonly" = "y" ] && payload_seabios="y"
	[ "$payload_seabios_grubonly" = "y" ] && payload_seabios_withgrub="y"

	# The reverse logic must not be applied. If SeaBIOS-with-GRUB works,
	# that doesn't mean GRUB-with-SeaBIOS will, e.g. VGA ROM execution
	[ "$payload_grub" != "y" ] && [ "$payload_seabios" != "y" ] && \
	    [ "$payload_uboot" != "y" ] && $err "'$board' defines no payload"

	[ "$payload_uboot" != "n" ] && [ "$payload_uboot" != "y" ] && \
		payload_uboot="n"
	[ "$payload_uboot" = "y" ] && [ -z "$uboot_config" ] && \
		uboot_config="default"

	# Override all payload directives with cmdline args
	[ -z "$_payload" ] && return 0
	eval "$(setvars "n" payload_grub payload_memtest payload_seabios \
	    payload_seabios_withgrub payload_uboot payload_grub_withseabios \
	    payload_seabios_grubonly)"
	eval "payload_$_payload=y"
}

build_payloads()
{
	romdir="bin/$board"
	cbdir="src/coreboot/$board"
	[ "$board" = "$tree" ] || cbdir="src/coreboot/$tree"
	cbfstool="cbutils/$tree/cbfstool"
	cbrom="$cbdir/build/coreboot.rom"

	[ -f "$cbfstool" ] || x_ ./update trees -b coreboot utils $tree

	mt86bin="memtest86plus/build64/memtest.bin"
	[ "$payload_memtest" != "y" ] || [ -f "src/$mt86bin" ] || \
		x_ ./update trees -b memtest86plus

	[ "$payload_seabios" = "y" ] && x_ ./update trees -b seabios
	if [ "$payload_grub" = "y" ] || [ "$payload_seabios_withgrub" = "y" ] \
	    || [ "$payload_seabios_grubonly" = "y" ]; then build_grub_payload
	fi
	[ "$payload_uboot" = "y" ] && build_uboot_payload; return 0
}

build_grub_payload()
{
	x_ mkdir -p elf/grub

	for keymapfile in config/grub/keymap/*.gkb; do
		[ -f "$keymapfile" ] && keymaps="$keymaps $keymapfile"
	done
	[ -z "$_keyboard" ] || [ -f "$grubcfgsdir/keymap/$_keyboard.gkb" ] || \
		$err "build_grub_payload: $_keyboard layout not defined"
	[ -n "$_keyboard" ] && keymaps="$grubcfgsdir/keymap/$_keyboard.gkb"
	[ -f "$grubelf" ] && return 0
	[ -f "src/grub/grub-mkstandalone" ] || x_ ./update trees -b grub

	./src/grub/grub-mkstandalone --grub-mkimage="src/grub/grub-mkimage" \
	    -O i386-coreboot -o "elf/grub/grub.elf" -d "src/grub/grub-core/" \
	    --fonts= --themes= --locales=  --modules="$grub_modules" \
	    --install-modules="$grub_install_modules" \
	    "/boot/grub/grub.cfg=$grubcfgsdir/config/grub_memdisk.cfg" \
	    "/boot/grub/grub_default.cfg=$grubcfgsdir/config/grub.cfg" || \
	    $err "could not generate grub.elf"
}

build_uboot_payload()
{
	x_ ./update trees -b u-boot $board
	ubdir="elf/u-boot/$board/$uboot_config"
	ubootelf="$ubdir/u-boot.elf"
	[ ! -f "$ubootelf" ] && [ -f "$ubdir/u-boot" ] && \
		ubootelf="$ubdir/u-boot"
	[ -f "$ubootelf" ] || $err "$board: Can't find u-boot"; return 0
}

build_target_mainboard()
{
	x_ rm -Rf "$romdir"

	for x in "normal" "vgarom" "libgfxinit"; do
		initmode="$x"
		hmode="vesafb"
		[ "$initmode" = "vgarom" ] || hmode="corebootfb"
		modes="$hmode txtmode"
		[ -z "$_displaymode" ] || modes="$_displaymode"
		for y in $modes; do
			displaymode="$y"
			[ "$initmode" = "normal" ] && \
			    [ "$displaymode" != "txtmode" ] && continue
			cbcfg="$targetdir/config/${initmode}_$displaymode"
			[ "$initmode" = "normal" ] && cbcfg="${cbcfg%_*}"
			build_roms "$cbcfg"; x_ rm -f "$cbrom"
		done
	done
}

build_roms()
{
	cbcfg="$1"
	e "$cbcfg" f not && return 0

	x_ ./update trees -b coreboot $board

	_cbrom="elf/coreboot_nopayload_DO_NOT_FLASH"
	_cbrom="$_cbrom/$board/${initmode}_$displaymode"
	[ "$initmode" = "normal" ] && _cbrom="${_cbrom%"_$displaymode"}"
	_cbrom="$_cbrom/coreboot.rom"
	cbrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
	x_ cp "$_cbrom" "$cbrom"

	[ "$payload_memtest" != "y" ] || x_ "$cbfstool" "$cbrom" add-payload \
	    -f "src/$mt86bin" -n img/memtest -c lzma
	[ "$payload_seabios" = "y" ] && build_seabios_roms
	[ "$payload_grub" != "y" ] || x_ build_grub_roms "$cbrom" "grub"
	[ "$payload_uboot" = "y" ] || return 0
	x_ cp "$_cbrom" "$cbrom"
	build_uboot_roms
}

build_seabios_roms()
{
	if [ "$payload_seabios_withgrub" = "y" ]; then
		t="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
		x_ cp "$cbrom" "$t"
		x_ build_grub_roms "$t" "seabios_withgrub"
	else
		t="$(mkSeabiosRom "$cbrom" "fallback/payload")" || \
		    $err "build_seabios_roms: cannot build tmprom"
		newrom="$romdir/seabios_${board}_${initmode}_$displaymode"
		[ "$initmode" = "normal" ] && newrom="$romdir/seabios" \
			&& newrom="${newrom}_${board}_$initmode"
		x_ cprom "$t" "$newrom.rom"
	fi
	x_ rm -f "$t"
}

# Make separate ROM images with GRUB payload, for each supported keymap
build_grub_roms()
{
	tmprom="$1"
	payload1="$2" # allow values: grub, seabios, seabios_withgrub

	grub_cbfs="fallback/payload"
	if [ "$payload1" = "grub" ] && [ "$payload_grub_withseabios" = "y" ]
	then
		_tmpmvrom="$(mkSeabiosRom "$tmprom" "seabios.elf")" || \
		    $err "build_grub_roms 1 $board: can't build tmprom"
		x_ mv "$_tmpmvrom" "$tmprom"
	elif [ "$payload1" != "grub" ] && [ "$payload_seabios_withgrub" = "y" ]
	then
		grub_cbfs="img/grub2"
		_tmpmvrom="$(mkSeabiosRom "$tmprom" fallback/payload)" || \
		    $err "build_grub_roms 2 $board: can't build tmprom"
		x_ mv "$_tmpmvrom" "$tmprom"
	fi

	# we only need insert grub.elf once, for each coreboot config:
	x_ "$cbfstool" "$tmprom" add-payload -f "$grubelf" \
	    -n "$grub_cbfs" -c lzma

	# we only need insert background.png once, for each coreboot config:
	if [ "$displaymode" = "vesafb" ] || \
	    [ "$displaymode" = "corebootfb" ]; then
		backgroundfile="config/grub/background/$grub_background"
		"$cbfstool" "$tmprom" add -f "$backgroundfile" -n \
		    background.png -t raw || $err "!bg, $backgroundfile"
	fi

	tmpcfg="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
	printf "set grub_scan_disk=\"%s\"\n" "$grub_scan_disk" > "$tmpcfg" || \
	    $err "set grub_scandisk, $grub_scan_disk, $tmpcfg"
	[ "$grub_scan_disk" = "both" ] || \
	    x_ "$cbfstool" "$tmprom" add -f "$tmpcfg" -n scan.cfg -t raw
	printf "set timeout=%s\n" "$grub_timeout" > "$tmpcfg" || \
	    $err "set timeout, $grub_timeout, $tmpcfg"
	[ -z "$grub_timeout" ] || x_ "$cbfstool" "$tmprom" add \
	    -f "$tmpcfg" -n timeout.cfg -t raw
	x_ rm -f "$tmpcfg"

	for keymapfile in $keymaps; do
		[ -f "$keymapfile" ] || continue
		keymap="${keymapfile##*/}"
		keymap="${keymap%.gkb}"

		tmpgrubrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
		x_ cp "$tmprom" "$tmpgrubrom"
		x_ "$cbfstool" "$tmpgrubrom" add -f "$keymapfile" \
		    -n keymap.gkb -t raw

		newrom="$romdir/${payload1}_${board}_${initmode}_"
		newrom="$newrom${displaymode}_$keymap.rom"
		[ "$initmode" = "normal" ] && newrom="$romdir/${payload1}_" \
		    && newrom="$newrom${board}_${initmode}_$keymap.rom"
		x_ cprom "$tmpgrubrom" "$newrom"
		if [ "$payload_seabios_grubonly" = "y" ]; then
			x_ "$cbfstool" "$tmpgrubrom" add \
			    -f "config/grub/bootorder" -n bootorder -t raw
			x_ cprom "$tmpgrubrom" "${newrom%.rom}_grubfirst.rom"
			x_ "$cbfstool" "$tmpgrubrom" add-int -i 0 \
			    -n etc/show-boot-menu
			x_ cprom "$tmpgrubrom" "${newrom%.rom}_grubonly.rom"
		fi
		x_ rm -f "$tmpgrubrom"
	done
}

# make a rom in /tmp/ and then print the path of that ROM
mkSeabiosRom() {
	_cbrom="$1" # rom to insert seabios in. will not be touched
		# (a tmpfile will be made instead)
	_seabios_cbfs_path="$2" # e.g. fallback/payload
	_seabioself="elf/seabios/default/$initmode/bios.bin.elf"
	tmprom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"

	x_ cp "$_cbrom" "$tmprom"
	x_ "$cbfstool" "$tmprom" add-payload -f "$_seabioself" \
	    -n "$_seabios_cbfs_path" -c lzma
	x_ "$cbfstool" "$tmprom" add-int -i 3000 -n etc/ps2-keyboard-spinup

	z="2"; [ "$initmode" = "vgarom" ] && z="0"
	x_ "$cbfstool" "$tmprom" add-int -i $z -n etc/pci-optionrom-exec
	x_ "$cbfstool" "$tmprom" add-int -i 0 -n etc/optionroms-checksum
	[ "$initmode" != "libgfxinit" ] || x_ "$cbfstool" "$tmprom" add -f \
	    "$seavgabiosrom" -n vgaroms/seavgabios.bin -t raw

	printf "%s\n" "$tmprom"
}

build_uboot_roms()
{
	tmprom="$(mkUbootRom "$cbrom" "fallback/payload")" || \
	    $err "build_uboot_roms $board: could not create tmprom"
	newrom="$romdir/uboot_payload_${board}_${initmode}_$displaymode.rom"
	x_ cprom "$tmprom" "$newrom"
	x_ rm -f "$tmprom"
}

# make a rom in /tmp/ and then print the path of that ROM
mkUbootRom() {
	_cbrom="$1"
	_uboot_cbfs_path="$2"

	_ubdir="elf/u-boot/$board/$uboot_config"
	_ubootelf="$_ubdir/u-boot.elf"
	[ -f "$_ubootelf" ] || _ubootelf="$_ubdir/u-boot"
	[ -f "$_ubootelf" ] || $err "mkUbootRom: $board: cant find u-boot"

	tmprom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"

	x_ cp "$_cbrom" "$tmprom"
	x_ "$cbfstool" "$tmprom" add-payload -f "$_ubootelf" \
	    -n "$_uboot_cbfs_path" -c lzma

	printf "%s\n" "$tmprom"
}

cprom()
{
	printf "Creating target image: %s\n" "$2"

	x_ mkdir -p "${2%/*}"
	x_ cp "$1" "$2"
}

main $@