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

   1 #
   2 # Copyright (C) 2019 OpenWrt.org
   3 #
   4
   5 . /lib/functions.sh
   6
   7 iodata_mstc_prepare_fail() {
   8         echo "failed to check and prepare the environment, rebooting..."
   9         umount -a
  10         reboot -f
  11 }
  12
  13 # I-O DATA devices manufactured by MSTC (MitraStar Technology Corp.)
  14 # have two important flags:
  15 # - bootnum: switch between two os images
  16 #     use 1st image in OpenWrt
  17 # - debugflag: enable/disable debug
  18 #     users can interrupt Z-Loader for recovering the device if enabled
  19 #
  20 # parameters:
  21 # - $1: the offset of "debugflag"
  22 iodata_mstc_upgrade_prepare() {
  23         local persist_mtd="$(find_mtd_part persist)"
  24         local factory_mtd="$(find_mtd_part factory)"
  25         local dflag_offset="$1"
  26
  27         if [ -z "$dflag_offset" ]; then
  28                 echo 'no debugflag offset provided'
  29                 iodata_mstc_prepare_fail
  30         fi
  31
  32         if [ -z "$persist_mtd" -o -z "$factory_mtd" ]; then
  33                 echo 'cannot find mtd partition(s), "factory" or "persist"'
  34                 iodata_mstc_prepare_fail
  35         fi
  36
  37         local bootnum=$(hexdump -s 4 -n 1 -e '"%x"' ${persist_mtd})
  38         local debugflag=$(hexdump -s $((dflag_offset)) -n 1 -e '"%x"' ${factory_mtd})
  39
  40         if [ "$bootnum" != "1" -a "$bootnum" != "2" ]; then
  41                 echo "failed to get bootnum, please check the value at 0x4 in ${persist_mtd}"
  42                 iodata_mstc_prepare_fail
  43         fi
  44         if [ "$debugflag" != "0" -a "$debugflag" != "1" ]; then
  45                 echo "failed to get debugflag, please check the value at ${dflag_offset} in ${factory_mtd}"
  46                 iodata_mstc_prepare_fail
  47         fi
  48         echo "current: bootnum => ${bootnum}, debugflag => ${debugflag}"
  49
  50         if [ "$bootnum" = "2" ]; then
  51                 if ! (echo -ne "\x01" | dd bs=1 count=1 seek=4 conv=notrunc of=${persist_mtd} 2>/dev/null); then
  52                         echo "failed to set bootnum"
  53                         iodata_mstc_prepare_fail
  54                 fi
  55                 echo "### switch to 1st os-image on next boot ###"
  56         fi
  57         if [ "$debugflag" = "0" ]; then
  58                 if ! (echo -ne "\x01" | dd bs=1 count=1 seek=$((dflag_offset)) conv=notrunc of=${factory_mtd} 2>/dev/null); then
  59                         echo "failed to set debugflag"
  60                         iodata_mstc_prepare_fail
  61                 fi
  62                 echo "### enable debug ###"
  63         fi
  64 }