Initial commit

target/linux/ramips/mt7621/base-files/lib/upgrade/dna.sh

@@ -0,0 +1,44 @@
+#
+# Copyright (C) 2023 Mauri Sandberg
+#
+
+# The vendor UBI is split in volumes 0-3. Volumes 0 and 1 contain U-Boot
+# environments env1 and env2, respectively. The vendor root file systems
+# are in volumes 2 (rootfs_0) and 3 (rootfs_1). Drop the two roots and
+# explicitly use rootfs_0 as a boot partition that contains the dtb and the
+# OpenWrt kernel. This is because the vendor U-Boot expects to find them there.
+# Then continue upgrade with the default method - a SquashFS rootfs will be
+# installed and the rest of UBI will be used as an overlay.
+
+# The 'kernel' inside the sysupgrage.tar is an UBIFS image that contains
+# /boot/dtb and /boot/kernel. The 'root' is an OpenWrt SquashFS root
+
+. /lib/functions.sh
+. /lib/upgrade/nand.sh
+
+dna_do_upgrade () {
+	tar -xaf $1
+
+	# get the size of the new bootfs
+	local _bootfs_size=$(wc -c < ./sysupgrade-dna_valokuitu-plus-ex400/kernel)
+	[ -n "$_bootfs_size" -a "$_bootfs_size" -gt "0" ] || nand_do_upgrade_failed
+
+	# remove existing rootfses and recreate rootfs_0
+	ubirmvol /dev/ubi0 --name=rootfs_0 > /dev/null 2>&1
+	ubirmvol /dev/ubi0 --name=rootfs_1 > /dev/null 2>&1
+	ubirmvol /dev/ubi0 --name=rootfs > /dev/null 2>&1
+	ubirmvol /dev/ubi0 --name=rootfs_data > /dev/null 2>&1
+	ubimkvol /dev/ubi0 --type=static --size=${_bootfs_size} --name=rootfs_0
+
+	# update the rootfs_0 contents
+	local _kern_ubivol=$( nand_find_volume "ubi0" "rootfs_0" )
+	ubiupdatevol /dev/${_kern_ubivol} sysupgrade-dna_valokuitu-plus-ex400/kernel
+
+	fw_setenv root_vol rootfs_0
+	fw_setenv boot_cnt_primary 0
+	fw_setenv boot_cnt_alt 0
+
+	# proceed to upgrade the default way
+	CI_KERNPART=none
+	nand_do_upgrade "$1"
+}