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                 "trx") return 0;;
  40                 *)
  41                         echo "Invalid image type. Please use only .trx files"
  42                         return 1
  43                 ;;
  44         esac
  45 }
  46
  47 # use default for platform_do_upgrade()