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
13set -e
14
15# Check arguments
16if [ $# -ne 1 ] ; then
17  echo "Usage: $0 src_fd"
18  echo "Outputs firmware.gbb, firmware[A|B].[data|vblock]"
19  exit 1
20fi
21
22# Make sure the tools we need are available.
23type -P mosys &>/dev/null || \
24  { echo "mosys tool not found."; exit 1; }
25
26src_fd=$1
27
28# Grab GBB Area offset and size
29match_str="GBB Area"
30line=$(mosys -f -k eeprom map $1 | grep "$match_str")
31offset="$(echo $line | sed -e 's/.*area_offset=\"\([a-f0-9x]*\)\".*/\1/')"
32let gbb_offset="$offset"
33size="$(echo $line | sed -e 's/.*area_size=\"\([a-f0-9x]*\)\".*/\1/')"
34let gbb_size="$size"
35
36# Grab Firmware A and B offset and size
37for i in "A" "B"
38do
39  match_str="$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"
56done
57
58echo "Extracting GBB"
59dd if="${src_fd}" of="firmware.gbb" skip="${gbb_offset}" bs=1 \
60  count="${gbb_size}"
61echo "Extracting Firmware data and vblock(s)"
62dd if="${src_fd}" of="firmwareA.data" skip="${fwA_offset}" bs=1 \
63  count="${fwA_size}"
64dd if="${src_fd}" of="firmwareA.vblock" skip="${fwA_vblock_offset}" bs=1 \
65  count="${fwA_vblock_size}"
66dd if="${src_fd}" of="firmwareB.data" skip="${fwB_offset}" bs=1 \
67  count="${fwB_size}"
68dd if="${src_fd}" of="firmwareB.vblock" skip="${fwB_vblock_offset}" bs=1 \
69  count="${fwB_vblock_size}"
70