#!/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"
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="$pv payload_seabios_withgrub payload_seabios_grubonly payload_grub mt86bin"
v="romdir cbrom initmode displaymode cbcfg targetdir tree release ubootelf"
v="$v grub_timeout board grub_scan_disk uboot_config grubtree grubelf"
eval "$(setvars "n" $pv)"
eval "$(setvars "" $v boards targets serprog_boards_dir)"

main()
{
	while [ $# -gt 0 ]; do
		[ "$1" = "list" ] && eval "x_ ls -1 config/coreboot; return 0"
		[ "$1" = "serprog" ] && shift && eval "mkserprog $@; return 0"
		[ "$1" = "all" ] && shift && continue
		boards="$1 $boards"; shift 1
	done

	[ -n "$boards" ] || boards="$(ls -1 config/coreboot)" || \
		$err "Cannot generate list of boards for building"
	for x in $boards; do
		[ -d "config/coreboot/$x/config" ] && configure_target "$x" \
		    && build_payloads && build_board && [ -d "bin/$board" ] \
		    && targets="$targets, $x"; continue
	done

	[ -z "$targets" ] && $err "No ROM images were compiled"
	printf "Check these ROM directories in bin/: %s\n" "${targets#, }"
	printf "DO NOT flash images from elf/ - please use bin/ instead.\n"
}

mkserprog()
{
	[ -z "${1+x}" ] && badcmd
	[ "$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 ]; then
		[ "$2" = "list" ] && serlist "$serprog_boards_dir" && return 0
		[ "$2" = "list" ] || build_${1}_rom "$2"
	else
		serlist "$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()
{
	x_ cmake -DPICO_BOARD="$1" -DPICO_SDK_PATH="$picosdk" \
	    -B "$picosrc/build" "$picosrc"
	x_ cmake --build "$picosrc/build"
	x_ mv "$picosrc/build/pico_serprog.uf2" \
	   "bin/serprog_rp2040/serprog_$1.uf2"
	printf "output to bin/serprog_rp2040/serprog_%s.uf2\n" "$1"
}

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

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

configure_target()
{
	eval "$(setvars "n" $pv) $(setvars "" $v)"
	board="$1"

	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="nvme ahci ata"

	[ -n "$grubtree" ] || grubtree="default"
	grubelf="elf/grub/$grubtree/payload/grub.elf"

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

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

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

	# 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"

	[ "$xbmk_release" = "y" ] && [ "$release" = "n" ] && return 1
	[ "$board" = "$tree" ] && return 1; return 0
}

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

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

	mt86bin="elf/memtest86plus/memtest.bin"
	[ "$payload_memtest" != "y" ] || [ -f "$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
		[ -f "$grubelf" ] || x_ ./update trees -b grub $grubtree
	fi
	[ "$payload_uboot" = "y" ] && build_uboot_payload; return 0
}

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

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

	for x in "normal" "vgarom" "libgfxinit"; do
		initmode="$x"
		hmode="vesafb"
		[ "$initmode" = "vgarom" ] || hmode="corebootfb"
		modes="$hmode txtmode"
		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"

	[ "$payload_memtest" != "y" ] || cbfs "$cbrom" "$mt86bin" img/memtest
	[ "$payload_seabios" = "y" ] && build_seabios_roms
	[ "$payload_grub" != "y" ] || build_grub_roms "$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"
		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
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:
	cbfs "$tmprom" "$grubelf" "$grub_cbfs"

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

	newrom="$romdir/${payload1}_${board}_${initmode}_$displaymode.rom"
	[ "$initmode" = "normal" ] && newrom="$romdir/${payload1}_" \
	    && newrom="$newrom${board}_$initmode.rom"
	x_ cprom "$tmprom" "$newrom"
	if [ "$payload_seabios_withgrub" = "y" ] && \
	    [ "$payload1" != "grub" ]; then
		cbfs "$tmprom" "$grubdata/bootorder" bootorder raw
		x_ cprom "$tmprom" "${newrom%.rom}_grubfirst.rom"
		if [ "$payload_seabios_grubonly" = "y" ]; then
			x_ "$cbfstool" "$tmprom" add-int -i 0 \
			    -n etc/show-boot-menu
			x_ cprom "$tmprom" "${newrom%.rom}_grubonly.rom"
		fi
	fi
}

# 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"
	cbfs "$tmprom" "$_seabioself" "$_seabios_cbfs_path"
	x_ "$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" ] || cbfs "$tmprom" "$seavgabiosrom" \
	    vgaroms/seavgabios.bin 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"

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

	x_ cp "$_cbrom" "$tmprom"
	cbfs "$tmprom" "$ubootelf" "$_uboot_cbfs_path"

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

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

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

main $@