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 "$1")
  37         local magic
  38
  39         case "$file_type" in
  40                 "chk")
  41                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  42                         local board_id_len=$(($header_len - 40))
  43                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  44                         echo "Found CHK image with device board_id $board_id"
  45
  46                         magic=$(get_magic_long_at "$1" "$header_len")
  47                         [ "$magic" != "48445230" ] && {
  48                                 echo "No valid TRX firmware in the CHK image"
  49                                 return 1
  50                         }
  51
  52                         echo "Flashing CHK images in unsupported. Please use only .trx files."
  53                         return 1
  54                 ;;
  55                 "cybertan")
  56                         magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  57                         echo "Found CyberTAN image with device magic: $magic"
  58
  59                         magic=$(get_magic_long_at "$1" 32)
  60                         [ "$magic" != "48445230" ] && {
  61                                 echo "No valid TRX firmware in the CyberTAN image"
  62                                 return 1
  63                         }
  64
  65                         echo "Flashing CyberTAN images in unsupported. Please use only .trx files."
  66                         return 1
  67                 ;;
  68                 "trx")
  69                         return 0
  70                 ;;
  71                 *)
  72                         echo "Invalid image type. Please use only .trx files"
  73                         return 1
  74                 ;;
  75         esac
  76 }
  77
  78 # use default for platform_do_upgrade()