#!/bin/bash
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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# Script that unpacks a firmware image (in .fd format) into its component
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# pieces. Only outputs firmware A and B data, vblocks and the GBB.
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# The mosys tool must be in the system path.
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# Abort on error
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set -e
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# Check arguments
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if [ $# -ne 1 ] ; then
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echo "Usage: $0 src_fd"
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echo "Outputs firmware.gbb, firmware[A|B].[data|vblock]"
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exit 1
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fi
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# Make sure the tools we need are available.
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type -P mosys &>/dev/null || \
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{ echo "mosys tool not found."; exit 1; }
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src_fd=$1
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# Grab GBB Area offset and size
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match_str="GBB Area"
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line=$(mosys -f -k eeprom map $1 | grep "$match_str")
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offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
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let gbb_offset="$offset"
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size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
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let gbb_size="$size"
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# Grab Firmware A and B offset and size
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for i in "A" "B"
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do
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match_str="$i Key"
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line=$(mosys -f -k eeprom map $1 | grep "$match_str")
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offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
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eval let \
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fw${i}_vblock_offset="$offset"
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size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
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eval let \
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fw${i}_vblock_size="$size"
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match_str="$i Data"
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line=$(mosys -f -k eeprom map $1 | grep "$match_str")
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offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
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eval let \
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fw${i}_offset="$offset"
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size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
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eval let \
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fw${i}_size="$size"
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done
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echo "Extracting GBB"
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dd if="${src_fd}" of="firmware.gbb" skip="${gbb_offset}" bs=1 \
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count="${gbb_size}"
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echo "Extracting Firmware data and vblock(s)"
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dd if="${src_fd}" of="firmwareA.data" skip="${fwA_offset}" bs=1 \
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count="${fwA_size}"
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dd if="${src_fd}" of="firmwareA.vblock" skip="${fwA_vblock_offset}" bs=1 \
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count="${fwA_vblock_size}"
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dd if="${src_fd}" of="firmwareB.data" skip="${fwB_offset}" bs=1 \
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count="${fwB_size}"
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dd if="${src_fd}" of="firmwareB.vblock" skip="${fwB_vblock_offset}" bs=1 \
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count="${fwB_vblock_size}"
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