3 # $(1): file to read magic from
4 # $(2): offset in bytes
6 dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
10 cat /proc/device-tree/compatible | tr '\0' '\t' | cut -f 1
13 platform_flash_type() {
14 # On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
15 grep -q "\"rootfs\"" /proc/mtd && {
23 platform_expected_image() {
24 local machine=$(platform_machine)
27 "netgear,r6250v1") echo "chk U12H245T00_NETGEAR"; return;;
28 "netgear,r6300v2") echo "chk U12H240T00_NETGEAR"; return;;
29 "netgear,r8000") echo "chk U12H315T00_NETGEAR"; return;;
36 magic=$(get_magic_long "$1")
48 magic=$(get_magic_long_at "$1" 14)
49 [ "$magic" = "55324e44" ] && {
57 platform_check_image() {
58 [ "$#" -gt 1 ] && return 1
60 local file_type=$(platform_identify "$1")
66 local header_len=$((0x$(get_magic_long_at "$1" 4)))
67 local board_id_len=$(($header_len - 40))
68 local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
69 local dev_board_id=$(platform_expected_image)
70 echo "Found CHK image with device board_id $board_id"
72 [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
73 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
77 if ! otrx check "$1" -o "$header_len"; then
78 echo "No valid TRX firmware in the CHK image"
83 local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
84 local dev_pattern=$(platform_expected_image)
85 echo "Found CyberTAN image with device pattern: $pattern"
87 [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
88 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
92 if ! otrx check "$1" -o 32; then
93 echo "No valid TRX firmware in the CyberTAN image"
98 if ! otrx check "$1"; then
99 echo "Invalid (corrupted?) TRX firmware"
104 echo "Invalid image type. Please use only .trx files"
112 platform_extract_trx_from_chk() {
113 local header_len=$((0x$(get_magic_long_at "$1" 4)))
115 dd if="$1" of="$2" bs=$header_len skip=1
118 platform_extract_trx_from_cybertan() {
119 dd if="$1" of="$2" bs=32 skip=1
122 platform_pre_upgrade() {
123 local file_type=$(platform_identify "$1")
124 local dir="/tmp/sysupgrade-bcm53xx"
127 [ "$(platform_flash_type)" != "nand" ] && return
131 "chk") trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_chk "$1" "$trx";;
132 "cybertan") trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_cybertan "$1" "$trx";;
135 # Extract partitions from trx
138 otrx extract "$trx" \
142 # Firmwares without UBI image should be flashed "normally"
143 local root_type=$(identify $dir/root)
144 [ "$root_type" != "ubi" ] && {
145 echo "Provided firmware doesn't use UBI for rootfs."
149 # Prepare TRX file with just a kernel that will replace current one
150 local linux_length=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
151 [ -z "$linux_length" ] && {
152 echo "Unable to find \"linux\" partition size"
155 linux_length=$((0x$linux_length))
156 local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
157 [ $kernel_length -gt $linux_length ] && {
158 echo "New kernel doesn't fit \"linux\" partition."
162 rm -f /tmp/kernel.trx
164 otrx create /tmp/kernel.trx \
165 -f $dir/kernel -b $(($linux_length + 28)) \
168 # Prepare UBI image (drop unwanted extra blocks)
170 while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
171 ubi_length=$(($ubi_length + 131072))
173 dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
176 mtd write /tmp/kernel.trx firmware
177 nand_do_upgrade /tmp/root.ubi
180 platform_do_upgrade() {
181 local file_type=$(platform_identify "$1")
184 [ "$(platform_flash_type)" == "nand" ] && {
185 echo "Writing whole image to NAND flash. All erase counters will be lost."
189 "chk") trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_chk "$1" "$trx";;
190 "cybertan") trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_cybertan "$1" "$trx";;
194 default_do_upgrade "$trx" "$@"