| 1 | #!/bin/sh |
| 2 | # |
| 3 | # Copyright (C) 2012 OpenWrt.org |
| 4 | # |
| 5 | |
| 6 | . /lib/functions.sh |
| 7 | . /lib/ar71xx.sh |
| 8 | |
| 9 | get_mtd_part_size() { |
| 10 | local part_name=$1 |
| 11 | local first dev size erasesize name |
| 12 | while read dev size erasesize name; do |
| 13 | name=${name#'"'}; name=${name%'"'} |
| 14 | if [ "$name" = "$part_name" ]; then |
| 15 | echo $((0x$size)) |
| 16 | break |
| 17 | fi |
| 18 | done < /proc/mtd |
| 19 | } |
| 20 | |
| 21 | get_magic_at() { |
| 22 | local mtddev=$1 |
| 23 | local pos=$2 |
| 24 | dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"' |
| 25 | } |
| 26 | |
| 27 | dir825b_is_caldata_valid() { |
| 28 | local mtddev=$1 |
| 29 | local magic |
| 30 | |
| 31 | magic=$(get_magic_at $mtddev 4096) |
| 32 | [ "$magic" != "a55a" ] && return 0 |
| 33 | |
| 34 | magic=$(get_magic_at $mtddev 20480) |
| 35 | [ "$magic" != "a55a" ] && return 0 |
| 36 | |
| 37 | return 1 |
| 38 | } |
| 39 | |
| 40 | dir825b_copy_caldata() { |
| 41 | local cal_src=$1 |
| 42 | local cal_dst=$2 |
| 43 | local mtd_src |
| 44 | local mtd_dst |
| 45 | local md5_src |
| 46 | local md5_dst |
| 47 | |
| 48 | mtd_src=$(find_mtd_part $cal_src) |
| 49 | [ -z "$mtd_src" ] && { |
| 50 | echo "no $cal_src partition found" |
| 51 | return 1 |
| 52 | } |
| 53 | |
| 54 | mtd_dst=$(find_mtd_part $cal_dst) |
| 55 | [ -z "$mtd_dst" ] && { |
| 56 | echo "no $cal_dst partition found" |
| 57 | return 1 |
| 58 | } |
| 59 | |
| 60 | dir825b_is_caldata_valid "$mtd_src" && { |
| 61 | echo "no valid calibration data found in $cal_src" |
| 62 | return 1 |
| 63 | } |
| 64 | |
| 65 | dir825b_is_caldata_valid "$mtd_dst" && { |
| 66 | echo "Copying calibration data from $cal_src to $cal_dst..." |
| 67 | dd if="$mtd_src" 2>/dev/null | mtd -q -q write - "$cal_dst" |
| 68 | } |
| 69 | |
| 70 | md5_src=$(md5sum "$mtd_src") && md5_src="${md5_src%% *}" |
| 71 | md5_dst=$(md5sum "$mtd_dst") && md5_dst="${md5_dst%% *}" |
| 72 | |
| 73 | [ "$md5_src" != "$md5_dst" ] && { |
| 74 | echo "calibration data mismatch $cal_src:$md5_src $cal_dst:$md5_dst" |
| 75 | return 1 |
| 76 | } |
| 77 | |
| 78 | return 0 |
| 79 | } |
| 80 | |
| 81 | dir825b_do_upgrade_combined() { |
| 82 | local fw_part=$1 |
| 83 | local fw_file=$2 |
| 84 | local fw_mtd=$(find_mtd_part $fw_part) |
| 85 | local fw_length=0x$(dd if="$fw_file" bs=2 skip=1 count=4 2>/dev/null) |
| 86 | local fw_blocks=$(($fw_length / 65536)) |
| 87 | |
| 88 | if [ -n "$fw_mtd" ] && [ ${fw_blocks:-0} -gt 0 ]; then |
| 89 | local append="" |
| 90 | [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR" |
| 91 | |
| 92 | sync |
| 93 | dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \ |
| 94 | mtd $append write - "$fw_part" |
| 95 | fi |
| 96 | } |
| 97 | |
| 98 | dir825b_check_image() { |
| 99 | local magic="$(get_magic_long "$1")" |
| 100 | local fw_mtd=$(find_mtd_part "firmware_orig") |
| 101 | |
| 102 | case "$magic" in |
| 103 | "27051956") |
| 104 | ;; |
| 105 | "43493030") |
| 106 | local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null) |
| 107 | local md5_chk=$(dd if="$1" bs=64k skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}" |
| 108 | local fw_len=$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null) |
| 109 | local fw_part_len=$(get_mtd_part_size "firmware") |
| 110 | |
| 111 | if [ -z "$fw_mtd" ]; then |
| 112 | ask_bool 0 "Do you have a backup of the caldata partition?" || { |
| 113 | echo "Warning, please make sure that you have a backup of the caldata partition." |
| 114 | echo "Once you have that, use 'sysupgrade -i' for upgrading to the 'fat' firmware." |
| 115 | return 1 |
| 116 | } |
| 117 | fi |
| 118 | |
| 119 | if [ -z "$md5_img" -o -z "$md5_chk" ]; then |
| 120 | echo "Unable to get image checksums. Maybe you are using a streamed image?" |
| 121 | return 1 |
| 122 | fi |
| 123 | |
| 124 | if [ "$md5_img" != "$md5_chk" ]; then |
| 125 | echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)" |
| 126 | return 1 |
| 127 | fi |
| 128 | |
| 129 | fw_len=$((0x$fw_len)) |
| 130 | fw_part_len=${fw_part_len:-0} |
| 131 | |
| 132 | if [ $fw_part_len -lt $fw_len ]; then |
| 133 | echo "The upgrade image is too big (size:$fw_len available:$fw_part_len)" |
| 134 | return 1 |
| 135 | fi |
| 136 | ;; |
| 137 | *) |
| 138 | echo "Unsupported image format." |
| 139 | return 1 |
| 140 | ;; |
| 141 | esac |
| 142 | |
| 143 | return 0 |
| 144 | } |
| 145 | |
| 146 | platform_do_upgrade_dir825b() { |
| 147 | local magic="$(get_magic_long "$1")" |
| 148 | local fw_mtd=$(find_mtd_part "firmware_orig") |
| 149 | |
| 150 | case "$magic" in |
| 151 | "27051956") |
| 152 | if [ -n "$fw_mtd" ]; then |
| 153 | # restore calibration data before downgrading to |
| 154 | # the normal image |
| 155 | dir825b_copy_caldata "caldata" "caldata_orig" || { |
| 156 | echo "unable to restore calibration data" |
| 157 | exit 1 |
| 158 | } |
| 159 | PART_NAME="firmware_orig" |
| 160 | else |
| 161 | PART_NAME="firmware" |
| 162 | fi |
| 163 | default_do_upgrade "$ARGV" |
| 164 | ;; |
| 165 | "43493030") |
| 166 | if [ -z "$fw_mtd" ]; then |
| 167 | # backup calibration data before upgrading to the |
| 168 | # fat image |
| 169 | dir825b_copy_caldata "caldata" "caldata_copy" || { |
| 170 | echo "unable to backup calibration data" |
| 171 | exit 1 |
| 172 | } |
| 173 | fi |
| 174 | dir825b_do_upgrade_combined "firmware" "$ARGV" |
| 175 | ;; |
| 176 | esac |
| 177 | } |
| 178 | |
