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#
# Copyright (C) 2019 OpenWrt.org
#
. /lib/functions.sh
iodata_mstc_prepare_fail() {
echo "failed to check and prepare the environment, rebooting..."
umount -a
reboot -f
}
# I-O DATA devices manufactured by MSTC (MitraStar Technology Corp.)
# have two important flags:
# - bootnum: switch between two os images
# use 1st image in OpenWrt
# - debugflag: enable/disable debug
# users can interrupt Z-Loader for recovering the device if enabled
#
# parameters:
# - $1: the offset of "debugflag"
iodata_mstc_upgrade_prepare() {
local persist_mtd="$(find_mtd_part persist)"
local factory_mtd="$(find_mtd_part factory)"
local dflag_offset="$1"
if [ -z "$dflag_offset" ]; then
echo 'no debugflag offset provided'
iodata_mstc_prepare_fail
fi
if [ -z "$persist_mtd" ] || [ -z "$factory_mtd" ]; then
echo 'cannot find mtd partition(s), "factory" or "persist"'
iodata_mstc_prepare_fail
fi
local bootnum=$(hexdump -s 4 -n 1 -e '"%x"' ${persist_mtd})
local debugflag=$(hexdump -s $((dflag_offset)) -n 1 -e '"%x"' ${factory_mtd})
if [ "$bootnum" != "1" ] && [ "$bootnum" != "2" ]; then
echo "failed to get bootnum, please check the value at 0x4 in ${persist_mtd}"
iodata_mstc_prepare_fail
fi
if [ "$debugflag" != "0" ] && [ "$debugflag" != "1" ]; then
echo "failed to get debugflag, please check the value at ${dflag_offset} in ${factory_mtd}"
iodata_mstc_prepare_fail
fi
echo "current: bootnum => ${bootnum}, debugflag => ${debugflag}"
if [ "$bootnum" = "2" ]; then
if ! (echo -ne "\x01" | dd bs=1 count=1 seek=4 conv=notrunc of=${persist_mtd} 2>/dev/null); then
echo "failed to set bootnum"
iodata_mstc_prepare_fail
fi
echo "### switch to 1st os-image on next boot ###"
fi
if [ "$debugflag" = "0" ]; then
if ! (echo -ne "\x01" | dd bs=1 count=1 seek=$((dflag_offset)) conv=notrunc of=${factory_mtd} 2>/dev/null); then
echo "failed to set debugflag"
iodata_mstc_prepare_fail
fi
echo "### enable debug ###"
fi
}
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