orangepizero2/sun50iw9/legacy: implement pre_package_kernel_image hook to convert vmlinuz to uImage manually; fix legacy u-boot build

- sourceaddr `0x40008000` was found in Xunlong's legacy kernel source squashed into a huge commit. Thanks, Xunlong!
- bring `busybox` dependency with inline hook for legacy u-boot "unix2dos" which is essential

config/boards/orangepizero2.conf

@@ -12,15 +12,14 @@ PACKAGE_LIST_BOARD="rfkill bluetooth bluez bluez-tools"
 FORCE_BOOTSCRIPT_UPDATE="yes"
 
 function post_family_tweaks_bsp__orangepizero2_BSP() {
-    display_alert "Installing BSP firmware and fixups"
+	display_alert "Installing BSP firmware and fixups"
+	: "${destination:?}"
 
 	if [[ $BRANCH == legacy ]]; then
-
 		# Bluetooth for most of others (custom patchram is needed only in legacy)
 		install -m 755 $SRC/packages/bsp/rk3399/brcm_patchram_plus_rk3399 $destination/usr/bin
 		cp $SRC/packages/bsp/rk3399/rk3399-bluetooth.service $destination/lib/systemd/system/
-
 	fi
 
 	return 0
-}
+}

config/bootscripts/boot-sun50iw9.cmd

@@ -61,6 +61,7 @@ for overlay_file in ${user_overlays}; do
         fi
 done
 
+# Legacy uboot, requires uImage - see pre_package_kernel_image__orangepi_legacy_uImage_manual_conversion()
 load ${devtype} ${devnum} ${ramdisk_addr_r} ${prefix}uInitrd
 load ${devtype} ${devnum} ${kernel_addr_r} ${prefix}uImage
 

config/sources/families/sun50iw9.conf

@@ -16,12 +16,27 @@ case $BRANCH in
 
 	legacy)
 
+		# Legacy kernel
 		LINUXFAMILY=sun50iw9
 		KERNELSOURCE='https://github.com/orangepi-xunlong/linux-orangepi.git'
 		declare -g KERNEL_MAJOR_MINOR="4.9" # Major and minor versions of this kernel.
 		KERNELBRANCH="branch:orange-pi-4.9-sun50iw9"
 		KERNELPATCHDIR=${BOARDFAMILY}-${BRANCH}
 		KERNELDIR='linux-orangepi'
+		INITRD_ARCH=arm
+		ASOUND_STATE='asound.state.sun50iw9-legacy'
+
+		# This (legacy/vendor) kernel requires uImage manual conversion; do it via a 'pre_package_kernel_image' hook.
+		function pre_package_kernel_image__orangepi_legacy_uImage_manual_conversion() {
+			display_alert "Converting" "${BOARDFAMILY} - ${LINUXFAMILY} :: legacy :: uImage" "warn"
+			if [[ -z "${kernel_image_pre_package_path}" || ! -f "${kernel_image_pre_package_path}" ]]; then
+				exit_with_error "kernel_image_pre_package_path ('${kernel_image_pre_package_path}') is not set or does not exist"
+			fi
+			run_host_command_logged mkimage -A arm -O linux -T kernel -C none -a "'0x40008000'" -e "'0x40008000'" -n "'Linux kernel'" -d "${kernel_image_pre_package_path}" "${kernel_image_pre_package_path}.uImage.tmp"
+			run_host_command_logged mv -v "${kernel_image_pre_package_path}.uImage.tmp" "${kernel_image_pre_package_path}"
+		}
+
+		# Legacy u-boot
 		BOOTSOURCE='https://github.com/orangepi-xunlong/u-boot-orangepi.git'
 		BOOTBRANCH='branch:v2018.05-sun50iw9'
 		BOOTPATCHDIR="legacy"
@@ -34,9 +49,6 @@ case $BRANCH in
 		OFFSET=20
 		ATFSOURCE=""
 		ATF_COMPILE="no"
-		INITRD_ARCH=arm
-
-		ASOUND_STATE='asound.state.sun50iw9-legacy'
 
 		# this overrides the one in sunxi64_common.inc
 		function write_uboot_platform() {
@@ -56,6 +68,12 @@ case $BRANCH in
 		;;
 esac
 
+# This build requires busybox (and dos2unix)
+function add_host_dependencies__sunxi_add_32_bit_c_compiler() {
+	display_alert "Adding busybox dep" "for ${BOARD} bootloader compile" "debug"
+	declare -g EXTRA_BUILD_DEPS="${EXTRA_BUILD_DEPS} busybox"
+}
+
 function family_tweaks_s() {
 	if [[ -f $SDCARD/lib/systemd/system/aw859a-bluetooth.service ]]; then
 		# Enable Bluetooth
@@ -82,18 +100,45 @@ function family_tweaks_bsp() {
 function uboot_custom_postprocess() {
 	if [[ ${BRANCH} == legacy ]]; then
 		display_alert "Post-processing U-Boot" "$BOARD - $BRANCH" "info"
-		run_host_command_logged cp -pv ${SRC}/packages/pack-uboot/${BOARDFAMILY}/bin/* . -r
+		# "Vendor" code (by Igor) is at https://raw.githubusercontent.com/orangepi-xunlong/orangepi-build/main/external/config/sources/families/sun50iw9.conf
+
+		run_host_command_logged rm -rfv dts/*.dts sys_config ${BOARD}-u-boot.dtb
+
+		run_host_command_logged cp -rpv ${SRC}/packages/pack-uboot/${BOARDFAMILY}/bin/* .
+
 		run_host_command_logged cp -pv sys_config/sys_config_${BOARD}.fex sys_config.fex
 		run_host_command_logged cp -pv u-boot.bin u-boot.fex
+
+		# [[ ${BOARD} =~ orangepizero2-b|orangepizero2-lts ]] && run_host_command_logged mv -v boot0_sdcard_new.fex boot0_sdcard.fex # From vendor code, they have multiple of those boards
+
+		# make u-boot dtb
 		run_host_command_logged dtc -p 2048 -W no-unit_address_vs_reg -@ -O dtb -o ${BOARD}-u-boot.dtb -b 0 dts/${BOARD}-u-boot.dts
+		[[ ! -f "${BOARD}-u-boot.dtb" ]] && exit_with_error "dts compilation failed for ${BOARD}-u-boot.dtb"
+
+		run_host_command_logged busybox unix2dos sys_config.fex
+
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/script sys_config.fex
 		run_host_command_logged cp -pv ${BOARD}-u-boot.dtb sunxi.fex
+
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/update_dtb sunxi.fex 4096
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/update_boot0 boot0_sdcard.fex sys_config.bin SDMMC_CARD
-		# @TODO: rpardini: this looks wrong
+
+		# rpardini: this looks wrong, but isn't. look at vendor code.
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/update_uboot -no_merge u-boot.fex sys_config.bin
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/update_uboot -no_merge u-boot.bin sys_config.bin
+
+		#pack boot package
+		run_host_command_logged busybox unix2dos boot_package.cfg
 		run_host_command_logged $SRC/packages/pack-uboot/${BOARDFAMILY}/tools/dragonsecboot -pack boot_package.cfg
+
+		# From vendor code, we never had this.
+		#if [[ ${MERGE_UBOOT} == yes ]]; then
+		#	display_alert "Merge u-boot" "u-boot-${BOARD}-merged.bin" "info"
+		#	dd if=/dev/zero of=u-boot-${BOARD}-merged.bin bs=1M count=20 > /dev/null 2>&1
+		#	dd if=boot0_sdcard.fex of=u-boot-${BOARD}-merged.bin bs=8k seek=1 conv=fsync > /dev/null 2>&1
+		#	dd if=boot_package.fex of=u-boot-${BOARD}-merged.bin bs=8k seek=2050 conv=fsync > /dev/null 2>&1
+		#	mv u-boot-${BOARD}-merged.bin ${DEB_STORAGE}/u-boot/
+		#fi
 	fi
 
 	return 0