target/linux/brcm47xx/base-files/lib/upgrade/platform.sh

   1 PART_NAME=firmware
   2
   3 # $(1): file to read magic from
   4 # $(2): offset in bytes
   5 get_magic_long_at() {
   6         dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
   7 }
   8
   9 brcm47xx_identify() {
  10         local magic
  11
  12         magic=$(get_magic_long "$1")
  13         case "$magic" in
  14                 "48445230")
  15                         echo "trx"
  16                         return
  17                         ;;
  18                 "2a23245e")
  19                         echo "chk"
  20                         return
  21                         ;;
  22         esac
  23
  24         magic=$(get_magic_long_at "$1" 14)
  25         [ "$magic" = "55324e44" ] && {
  26                 echo "cybertan"
  27                 return
  28         }
  29
  30         echo "unknown"
  31 }
  32
  33 platform_check_image() {
  34         [ "$#" -gt 1 ] && return 1
  35
  36         local file_type=$(brcm47xx_identify "$1")
  37
  38         case "$file_type" in
  39                 "chk")
  40                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  41                         local board_id_len=$(($header_len - 40))
  42                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  43                         echo "Found CHK image with device board_id $board_id"
  44                         echo "Flashing CHK images in unsupported. Please use only .trx files."
  45                         return 1
  46                 ;;
  47                 "cybertan")
  48                         local magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  49                         echo "Found CyberTAN image with device magic: $magic"
  50                         echo "Flashing CyberTAN images in unsupported. Please use only .trx files."
  51                         return 1
  52                 ;;
  53                 "trx")
  54                         return 0
  55                 ;;
  56                 *)
  57                         echo "Invalid image type. Please use only .trx files"
  58                         return 1
  59                 ;;
  60         esac
  61 }
  62
  63 # use default for platform_do_upgrade()