sunxi: add sysupgrade support

Enalbe builtin support for FAT filesystem as we need to mount boot
partition to store sysupgrade.tgz there

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/target/linux/sunxi/base-files/lib/upgrade/platform.sh b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000000..f2cd970d42
--- /dev/null
+++ b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,67 @@
+platform_check_image() {
+	true
+}
+
+platform_copy_config() {
+	local partdev
+
+	if export_partdevice partdev -1; then
+		mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
+		cp -af "$CONF_TAR" /mnt/
+		umount /mnt
+	fi
+}
+
+platform_do_upgrade() {
+	local diskdev partdev ibs diff
+
+	if export_bootdevice && export_partdevice diskdev -2; then
+		sync
+		if [ "$SAVE_PARTITIONS" = "1" ]; then
+			get_partitions "/dev/$diskdev" bootdisk
+
+			#get block size
+			if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then
+				ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")"
+			else
+				ibs=512
+			fi
+
+			#extract the boot sector from the image
+			get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
+
+			get_partitions /tmp/image.bs image
+
+			#compare tables
+			diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+			if [ -n "$diff" ]; then
+				echo "Partition layout is changed.  Full image will be written."
+				ask_bool 0 "Abort" && exit
+
+				get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+				return 0
+			fi
+
+			#write uboot image
+			get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 conv=notrunc
+			#iterate over each partition from the image and write it to the boot disk
+			while read part start size; do
+				part="$(($part - 2))"
+				if export_partdevice partdev $part; then
+					echo "Writing image to /dev/$partdev..."
+					get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync
+				else
+					echo "Unable to find partition $part device, skipped."
+				fi
+			done < /tmp/partmap.image
+
+			#copy partition uuid
+			echo "Writing new UUID to /dev/$diskdev..."
+			get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
+		else
+			get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+		fi
+
+		sleep 1
+	fi
+}