diff options
Diffstat (limited to 'target/linux/ar71xx/base-files/lib/upgrade/allnet.sh')
| -rw-r--r-- | target/linux/ar71xx/base-files/lib/upgrade/allnet.sh | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/target/linux/ar71xx/base-files/lib/upgrade/allnet.sh b/target/linux/ar71xx/base-files/lib/upgrade/allnet.sh new file mode 100644 index 000000000..9a375ff19 --- /dev/null +++ b/target/linux/ar71xx/base-files/lib/upgrade/allnet.sh @@ -0,0 +1,160 @@ +# The U-Boot loader of the some Allnet devices requires image sizes and +# checksums to be provided in the U-Boot environment. +# In case the check fails during boot, a failsafe-system is started to provide +# a minimal web-interface for flashing a new firmware. + +# make sure we got uboot-envtools and fw_env.config copied over to the ramfs +platform_add_ramfs_ubootenv() { + [ -e /usr/sbin/fw_printenv ] && install_bin /usr/sbin/fw_printenv /usr/sbin/fw_setenv + [ -e /etc/fw_env.config ] && install_file /etc/fw_env.config +} +append sysupgrade_pre_upgrade platform_add_ramfs_ubootenv + +# determine size of the main firmware partition +platform_get_firmware_size() { + local dev size erasesize name + while read dev size erasesize name; do + name=${name#'"'}; name=${name%'"'} + case "$name" in + firmware) + printf "%d" "0x$size" + break + ;; + esac + done < /proc/mtd +} + +# get the first 4 bytes (magic) of a given file starting at offset in hex format +get_magic_long_at() { + dd if="$1" skip=$(( $CI_BLKSZ / 4 * $2 )) bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"' +} + +get_filesize() { + wc -c "$1" | while read image_size _n ; do echo $image_size ; break; done +} + +# scan through the update image pages until matching a magic +platform_get_offset() { + offsetcount=0 + magiclong="x" + if [ -n "$3" ]; then + offsetcount=$3 + fi + while magiclong=$( get_magic_long_at "$1" "$offsetcount" ) && [ -n "$magiclong" ]; do + case "$magiclong" in + "2705"*) + # U-Boot image magic + if [ "$2" = "uImage" ]; then + echo $offsetcount + return + fi + ;; + "68737173"|"73717368") + # SquashFS + if [ "$2" = "rootfs" ]; then + echo $offsetcount + return + fi + ;; + "deadc0de"|"19852003") + # JFFS2 empty page + if [ "$2" = "rootfs-data" ]; then + echo $offsetcount + return + fi + ;; + esac + offsetcount=$(( $offsetcount + 1 )) + done +} + +platform_check_image_allnet() { + local fw_printenv=/usr/sbin/fw_printenv + [ ! -n "$fw_printenv" -o ! -x "$fw_printenv" ] && { + echo "Please install uboot-envtools!" + return 1 + } + + [ ! -r "/etc/fw_env.config" ] && { + echo "/etc/fw_env.config is missing" + return 1 + } + + local image_size=$( get_filesize "$1" ) + local firmware_size=$( platform_get_firmware_size ) + [ $image_size -ge $firmware_size ] && + { + echo "upgrade image is too big (${image_size}b > ${firmware_size}b)" + } + + local vmlinux_blockoffset=$( platform_get_offset "$1" uImage ) + [ -z $vmlinux_blockoffset ] && { + echo "vmlinux-uImage not found" + return 1 + } + + local rootfs_blockoffset=$( platform_get_offset "$1" rootfs "$vmlinux_blockoffset" ) + [ -z $rootfs_blockoffset ] && { + echo "missing rootfs" + return 1 + } + + local data_blockoffset=$( platform_get_offset "$1" rootfs-data "$rootfs_blockoffset" ) + [ -z $data_blockoffset ] && { + echo "rootfs doesn't have JFFS2 end marker" + return 1 + } + + return 0 +} + +platform_do_upgrade_allnet() { + local firmware_base_addr=$( printf "%d" "$1" ) + local vmlinux_blockoffset=$( platform_get_offset "$2" uImage ) + if [ ! -n "$vmlinux_blockoffset" ]; then + echo "can't determine uImage offset" + return 1 + fi + local rootfs_blockoffset=$( platform_get_offset "$2" rootfs $(( $vmlinux_blockoffset + 1 )) ) + local vmlinux_offset=$(( $vmlinux_blockoffset * $CI_BLKSZ )) + local vmlinux_addr=$(( $firmware_base_addr + $vmlinux_offset )) + local vmlinux_hexaddr=0x$( printf "%08x" "$vmlinux_addr" ) + if [ ! -n "$rootfs_blockoffset" ]; then + echo "can't determine rootfs offset" + return 1 + fi + local rootfs_offset=$(( $rootfs_blockoffset * $CI_BLKSZ )) + local rootfs_addr=$(( $firmware_base_addr + $rootfs_offset )) + local rootfs_hexaddr=0x$( printf "%08x" "$rootfs_addr" ) + local vmlinux_blockcount=$(( $rootfs_blockoffset - $vmlinux_blockoffset )) + local vmlinux_size=$(( $rootfs_offset - $vmlinux_offset )) + local vmlinux_hexsize=0x$( printf "%08x" "$vmlinux_size" ) + local data_blockoffset=$( platform_get_offset "$2" rootfs-data $(( $rootfs_blockoffset + 1 )) ) + if [ ! -n "$data_blockoffset" ]; then + echo "can't determine rootfs size" + return 1 + fi + local data_offset=$(( $data_blockoffset * $CI_BLKSZ )) + local rootfs_blockcount=$(( $data_blockoffset - $rootfs_blockoffset )) + local rootfs_size=$(( $data_offset - $rootfs_offset )) + local rootfs_hexsize=0x$( printf "%08x" "$rootfs_size" ) + + local rootfs_md5=$( dd if="$2" bs=$CI_BLKSZ skip=$rootfs_blockoffset count=$rootfs_blockcount 2>/dev/null | md5sum -); rootfs_md5="${rootfs_md5%% *}" + local vmlinux_md5=$( dd if="$2" bs=$CI_BLKSZ skip=$vmlinux_blockoffset count=$vmlinux_blockcount 2>/dev/null | md5sum -); vmlinux_md5="${vmlinux_md5%% *}" + # this needs a recent version of uboot-envtools! + cat >/tmp/fw_env_upgrade <<EOF +vmlinux_start_addr $vmlinux_hexaddr +vmlinux_size $vmlinux_hexsize +vmlinux_checksum $vmlinux_md5 +rootfs_start_addr $rootfs_hexaddr +rootfs_size $rootfs_hexsize +rootfs_checksum $rootfs_md5 +bootcmd bootm $vmlinux_hexaddr +EOF + fw_setenv -s /tmp/fw_env_upgrade || { + echo "failed to update U-Boot environment" + return 1 + } + shift + default_do_upgrade "$@" +} |