CROSS_FLAGS = ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

all: pine64-pinephone.img.xz pine64-pinetab.img.xz


pine64-pinephone.img: fat-pine64-pinephone.img u-boot-sunxi-with-spl.bin
	rm -f $@
	truncate --size 50M $@
	parted -s $@ mktable msdos
	parted -s $@ mkpart primary fat32 2048s 100%
	parted -s $@ set 1 boot on
	dd if=u-boot-sunxi-with-spl.bin of=$@ bs=8k seek=1
	dd if=fat-$@ of=$@ seek=1024 bs=1k

fat-pine64-pinephone.img: initramfs-pine64-pinephone.gz kernel-sunxi.gz pine64-pinephone.scr dtbs/sunxi/sun50i-a64-pinephone.dtb
	@echo "MKFS  $@"
	@rm -f $@
	@truncate --size 40M $@
	@mkfs.fat -F32 $@
	
	@mcopy -i $@ kernel-sunxi.gz ::Image.gz
	@mcopy -i $@ dtbs/sunxi/sun50i-a64-pinephone.dtb ::sun50i-a64-pinephone.dtb
	@mcopy -i $@ initramfs-pine64-pinephone.gz ::initramfs.gz
	@mcopy -i $@ pine64-pinephone.scr ::boot.scr

pine64-pinetab.img: fat-pine64-pinetab.img u-boot-sunxi-with-spl.bin
	rm -f $@
	truncate --size 50M $@
	parted -s $@ mktable msdos
	parted -s $@ mkpart primary fat32 2048s 100%
	parted -s $@ set 1 boot on
	dd if=u-boot-sunxi-with-spl.bin of=$@ bs=8k seek=1
	dd if=fat-$@ of=$@ seek=1024 bs=1k

fat-pine64-pinetab.img: initramfs-pine64-pinetab.gz kernel-sunxi.gz pine64-pinetab.scr dtbs/sunxi/sun50i-a64-pinetab.dtb
	@echo "MKFS  $@"
	@rm -f $@
	@truncate --size 40M $@
	@mkfs.fat -F32 $@
	
	@mcopy -i $@ kernel-sunxi.gz ::Image.gz
	@mcopy -i $@ dtbs/sunxi/sun50i-a64-pinetab.dtb ::sun50i-a64-pinetab.dtb
	@mcopy -i $@ initramfs-pine64-pinetab.gz ::initramfs.gz
	@mcopy -i $@ pine64-pinetab.scr ::boot.scr

%.img.xz: %.img
	@echo "XZ    $@"
	@xz -c $< > $@

initramfs/bin/busybox: src/busybox src/busybox_config
	@echo "MAKE  $@"
	@mkdir -p build/busybox
	@cp src/busybox_config build/busybox/.config
	@$(MAKE) -C src/busybox O=../../build/busybox $(CROSS_FLAGS)
	@cp build/busybox/busybox initramfs/bin/busybox
	
splash/%.ppm.gz: splash/%.ppm
	@echo "GZ    $@"
	@gzip < $< > $@
	
initramfs-%.cpio: initramfs/bin/busybox initramfs/init initramfs/init_functions.sh splash/%.ppm.gz splash/%-error.ppm.gz
	@echo "CPIO  $@"
	@rm -rf initramfs-$*
	@cp -r initramfs initramfs-$*
	@cp src/info-$*.sh initramfs-$*/info.sh
	@cp splash/$*.ppm.gz initramfs-$*/splash.ppm.gz
	@cp splash/$*-error.ppm.gz initramfs-$*/error.ppm.gz
	@cp src/info-$*.sh initramfs-$*/info.sh
	@cd initramfs-$*; find . | cpio -H newc -o > ../$@
	
initramfs-%.gz: initramfs-%.cpio
	@echo "GZ    $@"
	@gzip < $< > $@
	
kernel-sunxi.gz: src/linux_config
	@echo "MAKE  $@"
	@mkdir -p build/linux-sunxi
	@mkdir -p dtbs/sunxi
	@cp src/linux_config build/linux-sunxi/.config
	@$(MAKE) -C src/linux O=../../build/linux-sunxi $(CROSS_FLAGS) olddefconfig
	@$(MAKE) -C src/linux O=../../build/linux-sunxi $(CROSS_FLAGS)
	@cp build/linux-sunxi/arch/arm64/boot/Image.gz $@
	@cp build/linux-sunxi/arch/arm64/boot/dts/allwinner/*.dtb dtbs/sunxi/

%.scr: src/%.txt
	@echo "MKIMG $@"
	@mkimage -A arm -O linux -T script -C none -n "U-Boot boot script" -d $< $@
	
u-boot-sunxi-with-spl.bin:
	@echo "WGET  $@"
	@wget http://dl-cdn.alpinelinux.org/alpine/edge/main/aarch64/u-boot-pine64-2020.01-r0.apk
	@tar -xvf u-boot-pine64-2020.01-r0.apk usr/share/u-boot/pine64-lts/u-boot-sunxi-with-spl.bin --strip-components 4
	


.PHONY: clean cleanfast

cleanfast:
	@rm -rvf build
	@rm -rvf initramfs-*/
	@rm -vf *.img
	@rm -vf *.img.xz
	@rm -vf *.apk
	@rm -vf *.bin
	@rm -vf *.cpio
	@rm -vf *.gz
	@rm -vf *.scr
	@rm -vf splash/*.gz

clean: cleanfast
	@rm -vf kernel*.gz
	@rm -vf initramfs/bin/busybox
	@rm -vrf dtbs