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      1 #!/bin/bash
      2 
      3 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
      4 # Use of this source code is governed by a BSD-style license that can be
      5 # found in the LICENSE file.
      6 
      7 # Script that unpacks a firmware image (in .fd format) into its component
      8 # pieces. Only outputs firmware A and B data, vblocks and the GBB.
      9 
     10 # The mosys tool must be in the system path.
     11 
     12 # Abort on error
     13 set -e
     14 
     15 # Check arguments
     16 if [ $# -ne 1 ] ; then
     17   echo "Usage: $0 src_fd"
     18   echo "Outputs firmware.gbb, firmware[A|B].[data|vblock]"
     19   exit 1
     20 fi
     21 
     22 # Make sure the tools we need are available.
     23 type -P mosys &>/dev/null || \
     24   { echo "mosys tool not found."; exit 1; }
     25 
     26 src_fd=$1
     27 
     28 # Grab GBB Area offset and size
     29 match_str="GBB Area"
     30 line=$(mosys -f -k eeprom map $1 | grep "$match_str")
     31 offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
     32 let gbb_offset="$offset"
     33 size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
     34 let gbb_size="$size"
     35 
     36 # Grab Firmware A and B offset and size
     37 for i in "A" "B"
     38 do
     39   match_str="$i Key"
     40   line=$(mosys -f -k eeprom map $1 | grep "$match_str")
     41   offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
     42   eval let \
     43     fw${i}_vblock_offset="$offset"
     44   size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
     45   eval let \
     46     fw${i}_vblock_size="$size"
     47 
     48   match_str="$i Data"
     49   line=$(mosys -f -k eeprom map $1 | grep "$match_str")
     50   offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
     51   eval let \
     52     fw${i}_offset="$offset"
     53   size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
     54   eval let \
     55     fw${i}_size="$size"
     56 done
     57 
     58 echo "Extracting GBB"
     59 dd if="${src_fd}" of="firmware.gbb" skip="${gbb_offset}" bs=1 \
     60   count="${gbb_size}"
     61 echo "Extracting Firmware data and vblock(s)"
     62 dd if="${src_fd}" of="firmwareA.data" skip="${fwA_offset}" bs=1 \
     63   count="${fwA_size}"
     64 dd if="${src_fd}" of="firmwareA.vblock" skip="${fwA_vblock_offset}" bs=1 \
     65   count="${fwA_vblock_size}"
     66 dd if="${src_fd}" of="firmwareB.data" skip="${fwB_offset}" bs=1 \
     67   count="${fwB_size}"
     68 dd if="${src_fd}" of="firmwareB.vblock" skip="${fwB_vblock_offset}" bs=1 \
     69   count="${fwB_vblock_size}"
     70