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 "dlink,dir-885l") echo "seama wrgac42_dlink.2015_dir885l"; return;;
28 "netgear,r6250v1") echo "chk U12H245T00_NETGEAR"; return;;
29 "netgear,r6300v2") echo "chk U12H240T00_NETGEAR"; return;;
30 "netgear,r7000") echo "chk U12H270T00_NETGEAR"; return;;
31 "netgear,r7900") echo "chk U12H315T30_NETGEAR"; return;;
32 "netgear,r8000") echo "chk U12H315T00_NETGEAR"; return;;
33 "netgear,r8500") echo "chk U12H334T00_NETGEAR"; return;;
40 magic
=$
(get_magic_long
"$1")
56 magic
=$
(get_magic_long_at
"$1" 14)
57 [ "$magic" = "55324e44" ] && {
62 if osafeloader info
"$1" > /dev
/null
; then
70 platform_check_image
() {
71 [ "$#" -gt 1 ] && return 1
73 local file_type
=$
(platform_identify
"$1")
79 local header_len
=$
((0x$
(get_magic_long_at
"$1" 4)))
80 local board_id_len
=$
(($header_len - 40))
81 local board_id
=$
(dd if="$1" skip
=40 bs
=1 count
=$board_id_len 2>/dev
/null |
hexdump -v -e '1/1 "%c"')
82 local dev_board_id
=$
(platform_expected_image
)
83 echo "Found CHK image with device board_id $board_id"
85 [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
86 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
90 if ! otrx check
"$1" -o "$header_len"; then
91 echo "No valid TRX firmware in the CHK image"
96 local pattern
=$
(dd if="$1" bs
=1 count
=4 2>/dev
/null |
hexdump -v -e '1/1 "%c"')
97 local dev_pattern
=$
(platform_expected_image
)
98 echo "Found CyberTAN image with device pattern: $pattern"
100 [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
101 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
105 if ! otrx check
"$1" -o 32; then
106 echo "No valid TRX firmware in the CyberTAN image"
113 local img_signature
=$
(oseama info
"$1" |
grep "Meta entry:.*signature=" |
sed "s/.*=//")
114 local dev_signature
=$
(platform_expected_image
)
115 echo "Found Seama image with device signature: $img_signature"
117 [ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
118 echo "Firmware signature doesn't match device signature ($dev_signature)"
122 $
(oseama info
"$1" -e 0 |
grep -q "Meta entry:.*type=firmware") ||
{
123 echo "Seama container doesn't have firmware entity"
128 local expected
=$
(platform_expected_image
)
130 [ "$expected" == "safeloader" ] && {
131 echo "This device expects SafeLoader format and may not work with TRX"
135 if ! otrx check
"$1"; then
136 echo "Invalid (corrupted?) TRX firmware"
141 echo "Invalid image type. Please use only .trx files"
149 # $(1): image for upgrade (with possible extra header)
150 # $(2): offset of trx in image
151 platform_pre_upgrade_trx
() {
152 local dir
="/tmp/sysupgrade-bcm53xx"
156 # Extract partitions from trx
159 otrx extract
"$trx" \
160 ${offset:+-o $offset} \
164 echo "Failed to extract TRX partitions."
168 # Firmwares without UBI image should be flashed "normally"
169 local root_type
=$
(identify
$dir/root
)
170 [ "$root_type" != "ubi" ] && {
171 echo "Provided firmware doesn't use UBI for rootfs."
175 # Prepare TRX file with just a kernel that will replace current one
176 local linux_length
=$
(grep "\"linux\"" /proc
/mtd |
sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
177 [ -z "$linux_length" ] && {
178 echo "Unable to find \"linux\" partition size"
181 linux_length
=$
((0x
$linux_length))
182 local kernel_length
=$
(wc -c $dir/kernel | cut
-d ' ' -f 1)
183 [ $kernel_length -gt $linux_length ] && {
184 echo "New kernel doesn't fit \"linux\" partition."
188 rm -f /tmp
/kernel.trx
190 otrx create
/tmp
/kernel.trx \
191 -f $dir/kernel
-b $
(($linux_length + 28)) \
194 echo "Failed to create simple TRX with new kernel."
198 # Prepare UBI image (drop unwanted extra blocks)
200 while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
201 ubi_length
=$
(($ubi_length + 131072))
203 dd if=$dir/root of
=/tmp
/root.ubi bs
=131072 count
=$
((ubi_length
/ 131072)) 2>/dev
/null
205 echo "Failed to prepare new UBI image."
210 mtd
write /tmp
/kernel.trx firmware
211 nand_do_upgrade
/tmp
/root.ubi
214 platform_pre_upgrade_seama
() {
215 local dir
="/tmp/sysupgrade-bcm53xx"
219 # Extract Seama entity from Seama seal
222 oseama extract
"$seama" \
226 echo "Failed to extract Seama entity."
229 local entity_size
=$
(wc -c $dir/seama.entity | cut
-d ' ' -f 1)
234 [ $tmp -ge $entity_size ] && break
235 [ "$(dd if=$dir/seama.entity skip=$tmp bs=1 count=4 2>/dev/null)" = "UBI#" ] && {
239 tmp
=$
(($tmp + 131072))
241 [ $ubi_offset -eq 0 ] && {
242 echo "Failed to find UBI in Seama entity."
247 while [ "$(dd if=$dir/seama.entity skip=$(($ubi_offset + $ubi_length)) bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
248 ubi_length
=$
(($ubi_length + 131072))
251 dd if=$dir/seama.entity of
=$dir/kernel.seama bs
=131072 count
=$
(($ubi_offset / 131072)) 2>/dev
/null
252 dd if=$dir/seama.entity of
=$dir/root.ubi bs
=131072 skip
=$
(($ubi_offset / 131072)) count
=$
(($ubi_length / 131072)) 2>/dev
/null
255 local kernel_size
=$
(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"\(kernel\|linux\)".*/\1/p' /proc
/mtd
)
256 mtd
write $dir/kernel.seama firmware
257 mtd
${kernel_size:+-c 0x$kernel_size} fixseama firmware
258 nand_do_upgrade
$dir/root.ubi
261 platform_pre_upgrade
() {
262 export RAMFS_COPY_BIN
="${RAMFS_COPY_BIN} /usr/bin/osafeloader /usr/bin/oseama /bin/sed"
264 local file_type
=$
(platform_identify
"$1")
266 [ "$(platform_flash_type)" != "nand" ] && return
270 "chk") platform_pre_upgrade_trx
"$1" $
((0x$
(get_magic_long_at
"$1" 4)));;
271 "cybertan") platform_pre_upgrade_trx
"$1" 32;;
272 "seama") platform_pre_upgrade_seama
"$1";;
273 "trx") platform_pre_upgrade_trx
"$1";;
277 platform_trx_from_chk_cmd
() {
278 local header_len
=$
((0x$
(get_magic_long_at
"$1" 4)))
280 echo -n dd bs
=$header_len skip
=1
283 platform_trx_from_cybertan_cmd
() {
284 echo -n dd bs
=32 skip
=1
287 platform_img_from_safeloader
() {
288 local dir
="/tmp/sysupgrade-bcm53xx"
290 # Extract partitions from SafeLoader
293 osafeloader extract
"$1" \
296 osafeloader extract
"$1" \
300 mtd
write $dir/file-system rootfs
302 echo -n $dir/os-image
305 platform_img_from_seama
() {
306 local dir
="/tmp/sysupgrade-bcm53xx"
307 local offset
=$
(oseama info
"$1" -e 0 |
grep "Entity offset:" |
sed "s/.*:\s*//")
308 local size
=$
(oseama info
"$1" -e 0 |
grep "Entity size:" |
sed "s/.*:\s*//")
310 # Busybox doesn't support required iflag-s
311 # echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
315 dd if="$1" of
=$dir/image-noheader.bin bs
=$offset skip
=1
316 dd if=$dir/image-noheader.bin of
=$dir/image-entity.bin bs
=$size count
=1
318 echo -n $dir/image-entity.bin
321 platform_do_upgrade
() {
322 local file_type
=$
(platform_identify
"$1")
326 [ "$(platform_flash_type)" == "nand" ] && {
327 echo "Writing whole image to NAND flash. All erase counters will be lost."
331 "chk") cmd
=$
(platform_trx_from_chk_cmd
"$trx");;
332 "cybertan") cmd
=$
(platform_trx_from_cybertan_cmd
"$trx");;
333 "safeloader") trx
=$
(platform_img_from_safeloader
"$trx");;
334 "seama") trx
=$
(platform_img_from_seama
"$trx");;
337 default_do_upgrade
"$trx" "$cmd"