Build u-boot flash/erase image

.gitignore

@@ -4,3 +4,5 @@
 /tmp/
 /sunxi-tools/
 /bootloaders/
+/*.img
+/*.img.xz

Makefile

@@ -8,6 +8,7 @@ include Makefile.atf.mk
 include Makefile.uboot.mk
 include Makefile.tools.mk
 include Makefile.sopine.mk
+include Makefile.blobs.mk
 
 bootloaders:
 	mkdir -p $@
@@ -21,4 +22,6 @@ bootloaders/sopine_baseboard-uboot.bin: tmp/u-boot-sopine_baseboard/u-boot-with-
 .PHONY: image-bootloaders
 image-bootloaders: \
 	bootloaders/pine64_plus-uboot.bin \
-	bootloaders/sopine_baseboard-uboot.bin
+	bootloaders/sopine_baseboard-uboot.bin \
+	u-boot-sopine-flash-spi.img.xz \
+	u-boot-sopine-erase-spi.img.xz \

Makefile.blobs.mk

@@ -0,0 +1,17 @@
+tmp/u-boot/%/boot.scr: blobs/%.cmd
+	mkdir -p $$(dirname $@)
+	mkimage -C none -A arm -T script -d $< $@
+
+tmp/u-boot/%/boot.img: tmp/u-boot/%/boot.scr
+	dd if=/dev/zero of=$@ bs=1M count=2
+	mkfs.vfat -n "u-boot-script" $@
+	mcopy -sm -i $@ $< ::
+
+u-boot-sopine-%.img: tmp/u-boot-sopine_baseboard/u-boot-with-spl.bin tmp/u-boot/%/boot.img
+	rm -f $@.tmp
+	dd if=$(word 2,$^) of=$@.tmp seek=8192 conv=notrunc status=none
+	parted -s $@.tmp mklabel msdos
+	parted -s $@.tmp unit s mkpart primary fat16 8192 100%
+	parted -s $@.tmp set 1 boot on
+	dd if=$(word 1,$^) of=$@.tmp seek=16 conv=notrunc status=none
+	mv "$@.tmp" $@

Makefile.tools.mk

@@ -3,3 +3,9 @@ sunxi-tools:
 
 sunxi-tools/sunxi-fel: sunxi-tools
 	make -C sunxi-tools
+
+%.img.xz: %.img
+	pxz -f -3 $<
+
+clean:
+	rm -rf tmp/ bootloaders/

blobs/erase-spi.cmd

@@ -0,0 +1,7 @@
+# erase flash
+sf probe
+
+echo erasing flash...
+sf erase 0 3e8000
+
+echo done

blobs/flash-spi.cmd

@@ -0,0 +1,15 @@
+# first read existing loader
+sf probe
+
+echo reading flash...
+${devtype} read ${kernel_addr_r} 10 1f40;
+
+# erase flash
+echo erasing flash...
+sf erase 0 3e8000
+
+# write flash
+echo writing flash...
+sf write ${kernel_addr_r} 0 3e8000
+
+echo done