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=$2 bs=1 count=4 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
   7 }
   8
   9 platform_machine() {
  10         grep "machine" /proc/cpuinfo | sed "s/.*:[ \t]*//"
  11 }
  12
  13 platform_expected_chk_board_id() {
  14         local machine=$(platform_machine)
  15
  16         case "$machine" in
  17                 "Netgear WNDR4000")     echo "U12H181T00_NETGEAR"; return;;
  18         esac
  19 }
  20
  21 platform_expected_cybertan_pattern() {
  22         local machine=$(platform_machine)
  23
  24         case "$machine" in
  25                 "Linksys E1000 V2.1")   echo "E100"; return;;
  26         esac
  27 }
  28
  29 brcm47xx_identify() {
  30         local magic
  31
  32         magic=$(get_magic_long "$1")
  33         case "$magic" in
  34                 "48445230")
  35                         echo "trx"
  36                         return
  37                         ;;
  38                 "2a23245e")
  39                         echo "chk"
  40                         return
  41                         ;;
  42         esac
  43
  44         magic=$(get_magic_long_at "$1" 14)
  45         [ "$magic" = "55324e44" ] && {
  46                 echo "cybertan"
  47                 return
  48         }
  49
  50         echo "unknown"
  51 }
  52
  53 platform_check_image() {
  54         [ "$#" -gt 1 ] && return 1
  55
  56         local file_type=$(brcm47xx_identify "$1")
  57         local magic
  58
  59         case "$file_type" in
  60                 "chk")
  61                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  62                         local board_id_len=$(($header_len - 40))
  63                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  64                         local dev_board_id=$(platform_expected_chk_board_id)
  65                         echo "Found CHK image with device board_id $board_id"
  66
  67                         [ -n "$dev_board_id" -a "$board_id" != "$dev_board_id" ] && {
  68                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  69                                 return 1
  70                         }
  71
  72                         magic=$(get_magic_long_at "$1" "$header_len")
  73                         [ "$magic" != "48445230" ] && {
  74                                 echo "No valid TRX firmware in the CHK image"
  75                                 return 1
  76                         }
  77
  78                         return 0
  79                 ;;
  80                 "cybertan")
  81                         local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  82                         local dev_pattern=$(platform_expected_cybertan_pattern)
  83                         echo "Found CyberTAN image with device pattern: $pattern"
  84
  85                         [ -n "$dev_pattern" -a "$pattern" != "$dev_pattern" ] && {
  86                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
  87                                 return 1
  88                         }
  89
  90                         magic=$(get_magic_long_at "$1" 32)
  91                         [ "$magic" != "48445230" ] && {
  92                                 echo "No valid TRX firmware in the CyberTAN image"
  93                                 return 1
  94                         }
  95
  96                         return 0
  97                 ;;
  98                 "trx")
  99                         return 0
 100                 ;;
 101                 *)
 102                         echo "Invalid image type. Please use only .trx files"
 103                         return 1
 104                 ;;
 105         esac
 106 }
 107
 108 platform_do_upgrade_chk() {
 109         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 110         local trx="/tmp/$1.trx"
 111
 112         dd if="$1" of="$trx" bs=$header_len skip=1
 113         shift
 114         default_do_upgrade "$trx" "$@"
 115 }
 116
 117 platform_do_upgrade_cybertan() {
 118         local trx="/tmp/$1.trx"
 119
 120         dd if="$1" of="$trx" bs=32 skip=1
 121         shift
 122         default_do_upgrade "$trx" "$@"
 123 }
 124
 125 platform_do_upgrade() {
 126         local file_type=$(brcm47xx_identify "$1")
 127
 128         case "$file_type" in
 129                 "chk")          platform_do_upgrade_chk "$ARGV";;
 130                 "cybertan")     platform_do_upgrade_cybertan "$ARGV";;
 131                 *)              default_do_upgrade "$ARGV";;
 132         esac
 133 }