OpenWrt – Blame information for rev 4

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4 office 1 #!/bin/sh
2 #
3 # Copyright (C) 2012 OpenWrt.org
4 #
5  
6 . /lib/functions.sh
7 . /lib/ar71xx.sh
8  
9 get_magic_at() {
10 local mtddev=$1
11 local pos=$2
12 dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
13 }
14  
15 dir825b_is_caldata_valid() {
16 local mtddev=$1
17 local magic
18  
19 magic=$(get_magic_at $mtddev 4096)
20 [ "$magic" != "a55a" ] && return 0
21  
22 magic=$(get_magic_at $mtddev 20480)
23 [ "$magic" != "a55a" ] && return 0
24  
25 return 1
26 }
27  
28 dir825b_copy_caldata() {
29 local cal_src=$1
30 local cal_dst=$2
31 local mtd_src
32 local mtd_dst
33 local md5_src
34 local md5_dst
35  
36 mtd_src=$(find_mtd_part $cal_src)
37 [ -z "$mtd_src" ] && {
38 echo "no $cal_src partition found"
39 return 1
40 }
41  
42 mtd_dst=$(find_mtd_part $cal_dst)
43 [ -z "$mtd_dst" ] && {
44 echo "no $cal_dst partition found"
45 return 1
46 }
47  
48 dir825b_is_caldata_valid "$mtd_src" && {
49 echo "no valid calibration data found in $cal_src"
50 return 1
51 }
52  
53 dir825b_is_caldata_valid "$mtd_dst" && {
54 echo "Copying calibration data from $cal_src to $cal_dst..."
55 dd if="$mtd_src" 2>/dev/null | mtd -q -q write - "$cal_dst"
56 }
57  
58 md5_src=$(md5sum "$mtd_src") && md5_src="${md5_src%% *}"
59 md5_dst=$(md5sum "$mtd_dst") && md5_dst="${md5_dst%% *}"
60  
61 [ "$md5_src" != "$md5_dst" ] && {
62 echo "calibration data mismatch $cal_src:$md5_src $cal_dst:$md5_dst"
63 return 1
64 }
65  
66 return 0
67 }
68  
69 dir825b_do_upgrade_combined() {
70 local fw_part=$1
71 local fw_file=$2
72 local fw_mtd=$(find_mtd_part $fw_part)
73 local fw_length=0x$(dd if="$fw_file" bs=2 skip=1 count=4 2>/dev/null)
74 local fw_blocks=$(($fw_length / 65536))
75  
76 if [ -n "$fw_mtd" ] && [ ${fw_blocks:-0} -gt 0 ]; then
77 local append=""
78 [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
79  
80 sync
81 dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \
82 mtd $append write - "$fw_part"
83 fi
84 }
85  
86 dir825b_check_image() {
87 local magic="$(get_magic_long "$1")"
88 local fw_mtd=$(find_mtd_part "firmware_orig")
89  
90 case "$magic" in
91 "27051956")
92 ;;
93 "43493030")
94 local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
95 local md5_chk=$(dd if="$1" bs=64k skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
96 local fw_len=$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
97 local fw_part_len=$(mtd_get_part_size "firmware")
98  
99 if [ -z "$fw_mtd" ]; then
100 ask_bool 0 "Do you have a backup of the caldata partition?" || {
101 echo "Warning, please make sure that you have a backup of the caldata partition."
102 echo "Once you have that, use 'sysupgrade -i' for upgrading to the 'fat' firmware."
103 return 1
104 }
105 fi
106  
107 if [ -z "$md5_img" -o -z "$md5_chk" ]; then
108 echo "Unable to get image checksums. Maybe you are using a streamed image?"
109 return 1
110 fi
111  
112 if [ "$md5_img" != "$md5_chk" ]; then
113 echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
114 return 1
115 fi
116  
117 fw_len=$((0x$fw_len))
118 fw_part_len=${fw_part_len:-0}
119  
120 if [ $fw_part_len -lt $fw_len ]; then
121 echo "The upgrade image is too big (size:$fw_len available:$fw_part_len)"
122 return 1
123 fi
124 ;;
125 *)
126 echo "Unsupported image format."
127 return 1
128 ;;
129 esac
130  
131 return 0
132 }
133  
134 platform_do_upgrade_dir825b() {
135 local magic="$(get_magic_long "$1")"
136 local fw_mtd=$(find_mtd_part "firmware_orig")
137  
138 case "$magic" in
139 "27051956")
140 if [ -n "$fw_mtd" ]; then
141 # restore calibration data before downgrading to
142 # the normal image
143 dir825b_copy_caldata "caldata" "caldata_orig" || {
144 echo "unable to restore calibration data"
145 exit 1
146 }
147 PART_NAME="firmware_orig"
148 else
149 PART_NAME="firmware"
150 fi
151 default_do_upgrade "$ARGV"
152 ;;
153 "43493030")
154 if [ -z "$fw_mtd" ]; then
155 # backup calibration data before upgrading to the
156 # fat image
157 dir825b_copy_caldata "caldata" "caldata_copy" || {
158 echo "unable to backup calibration data"
159 exit 1
160 }
161 fi
162 dir825b_do_upgrade_combined "firmware" "$ARGV"
163 ;;
164 esac
165 }