target/linux/bcm53xx/base-files/lib/upgrade/platform.sh

   1 PART_NAME=firmware
   2
   3 # $(1): file to read magic from
   4 # $(2): offset in bytes
   5 get_magic_long_at() {
   6         dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
   7 }
   8
   9 platform_machine() {
  10         cat /proc/device-tree/compatible | tr '\0' '\t' | cut -f 1
  11 }
  12
  13 platform_flash_type() {
  14         # On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
  15         grep -q "\"rootfs\"" /proc/mtd && {
  16                 echo "serial"
  17                 return
  18         }
  19
  20         echo "nand"
  21 }
  22
  23 platform_expected_image() {
  24         local machine=$(platform_machine)
  25
  26         case "$machine" in
  27                 "dlink,dir-885l")       echo "seama wrgac42_dlink.2015_dir885l"; return;;
  28                 "netgear,r6250v1")      echo "chk U12H245T00_NETGEAR"; return;;
  29                 "netgear,r6300v2")      echo "chk U12H240T00_NETGEAR"; return;;
  30                 "netgear,r7000")        echo "chk U12H270T00_NETGEAR"; return;;
  31                 "netgear,r7900")        echo "chk U12H315T30_NETGEAR"; return;;
  32                 "netgear,r8000")        echo "chk U12H315T00_NETGEAR"; return;;
  33                 "netgear,r8500")        echo "chk U12H334T00_NETGEAR"; return;;
  34         esac
  35 }
  36
  37 platform_identify() {
  38         local magic
  39
  40         magic=$(get_magic_long "$1")
  41         case "$magic" in
  42                 "48445230")
  43                         echo "trx"
  44                         return
  45                         ;;
  46                 "2a23245e")
  47                         echo "chk"
  48                         return
  49                         ;;
  50                 "5ea3a417")
  51                         echo "seama"
  52                         return
  53                         ;;
  54         esac
  55
  56         magic=$(get_magic_long_at "$1" 14)
  57         [ "$magic" = "55324e44" ] && {
  58                 echo "cybertan"
  59                 return
  60         }
  61
  62         if osafeloader info "$1" > /dev/null; then
  63                 echo "safeloader"
  64                 return
  65         fi
  66
  67         echo "unknown"
  68 }
  69
  70 platform_check_image() {
  71         [ "$#" -gt 1 ] && return 1
  72
  73         local file_type=$(platform_identify "$1")
  74         local magic
  75         local error=0
  76
  77         case "$file_type" in
  78                 "chk")
  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 $board_id"
  84
  85                         [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
  86                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  87                                 error=1
  88                         }
  89
  90                         if ! otrx check "$1" -o "$header_len"; then
  91                                 echo "No valid TRX firmware in the CHK image"
  92                                 error=1
  93                         fi
  94                 ;;
  95                 "cybertan")
  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: $pattern"
  99
 100                         [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
 101                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
 102                                 error=1
 103                         }
 104
 105                         if ! otrx check "$1" -o 32; then
 106                                 echo "No valid TRX firmware in the CyberTAN image"
 107                                 error=1
 108                         fi
 109                 ;;
 110                 "safeloader")
 111                 ;;
 112                 "seama")
 113                         local img_signature=$(oseama info "$1" | grep "Meta entry:.*signature=" | sed "s/.*=//")
 114                         local dev_signature=$(platform_expected_image)
 115                         echo "Found Seama image with device signature: $img_signature"
 116
 117                         [ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
 118                                 echo "Firmware signature doesn't match device signature ($dev_signature)"
 119                                 error=1
 120                         }
 121
 122                         $(oseama info "$1" -e 0 | grep -q "Meta entry:.*type=firmware") || {
 123                                 echo "Seama container doesn't have firmware entity"
 124                                 error=1
 125                         }
 126                 ;;
 127                 "trx")
 128                         local expected=$(platform_expected_image)
 129
 130                         [ "$expected" == "safeloader" ] && {
 131                                 echo "This device expects SafeLoader format and may not work with TRX"
 132                                 error=1
 133                         }
 134
 135                         if ! otrx check "$1"; then
 136                                 echo "Invalid (corrupted?) TRX firmware"
 137                                 error=1
 138                         fi
 139                 ;;
 140                 *)
 141                         echo "Invalid image type. Please use only .trx files"
 142                         error=1
 143                 ;;
 144         esac
 145
 146         return $error
 147 }
 148
 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"
 153         local trx="$1"
 154         local offset="$2"
 155
 156         # Extract partitions from trx
 157         rm -fR $dir
 158         mkdir -p $dir
 159         otrx extract "$trx" \
 160                 ${offset:+-o $offset} \
 161                 -1 $dir/kernel \
 162                 -2 $dir/root
 163         [ $? -ne 0 ] && {
 164                 echo "Failed to extract TRX partitions."
 165                 return
 166         }
 167
 168         # Firmwares without UBI image should be flashed "normally"
 169         local root_type=$(identify $dir/root)
 170         [ "$root_type" != "ubi" ] && {
 171                 echo "Provided firmware doesn't use UBI for rootfs."
 172                 return
 173         }
 174
 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 "$linux_length" ] && {
 178                 echo "Unable to find \"linux\" partition size"
 179                 exit 1
 180         }
 181         linux_length=$((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."
 185                 return
 186         }
 187         rm -f /tmp/null.bin
 188         rm -f /tmp/kernel.trx
 189         touch /tmp/null.bin
 190         otrx create /tmp/kernel.trx \
 191                 -f $dir/kernel -b $(($linux_length + 28)) \
 192                 -f /tmp/null.bin
 193         [ $? -ne 0 ] && {
 194                 echo "Failed to create simple TRX with new kernel."
 195                 return
 196         }
 197
 198         # Prepare UBI image (drop unwanted extra blocks)
 199         local ubi_length=0
 200         while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 201                 ubi_length=$(($ubi_length + 131072))
 202         done
 203         dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
 204         [ $? -ne 0 ] && {
 205                 echo "Failed to prepare new UBI image."
 206                 return
 207         }
 208
 209         # Flash
 210         mtd write /tmp/kernel.trx firmware
 211         nand_do_upgrade /tmp/root.ubi
 212 }
 213
 214 platform_pre_upgrade_seama() {
 215         local dir="/tmp/sysupgrade-bcm53xx"
 216         local seama="$1"
 217         local tmp
 218
 219         # Extract Seama entity from Seama seal
 220         rm -fR $dir
 221         mkdir -p $dir
 222         oseama extract "$seama" \
 223                 -e 0 \
 224                 -o $dir/seama.entity
 225         [ $? -ne 0 ] && {
 226                 echo "Failed to extract Seama entity."
 227                 return
 228         }
 229         local entity_size=$(wc -c $dir/seama.entity | cut -d ' ' -f 1)
 230
 231         local ubi_offset=0
 232         tmp=0
 233         while [ 1 ]; do
 234                 [ $tmp -ge $entity_size ] && break
 235                 [ "$(dd if=$dir/seama.entity skip=$tmp bs=1 count=4 2>/dev/null)" = "UBI#" ] && {
 236                         ubi_offset=$tmp
 237                         break
 238                 }
 239                 tmp=$(($tmp + 131072))
 240         done
 241         [ $ubi_offset -eq 0 ] && {
 242                 echo "Failed to find UBI in Seama entity."
 243                 return
 244         }
 245
 246         local ubi_length=0
 247         while [ "$(dd if=$dir/seama.entity skip=$(($ubi_offset + $ubi_length)) bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 248                 ubi_length=$(($ubi_length + 131072))
 249         done
 250
 251         dd if=$dir/seama.entity of=$dir/kernel.seama bs=131072 count=$(($ubi_offset / 131072)) 2>/dev/null
 252         dd if=$dir/seama.entity of=$dir/root.ubi bs=131072 skip=$(($ubi_offset / 131072)) count=$(($ubi_length / 131072)) 2>/dev/null
 253
 254         # Flash
 255         local kernel_size=$(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 $dir/root.ubi
 259 }
 260
 261 platform_pre_upgrade() {
 262         export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/bin/osafeloader /usr/bin/oseama /bin/sed"
 263
 264         local file_type=$(platform_identify "$1")
 265
 266         [ "$(platform_flash_type)" != "nand" ] && return
 267
 268         # Find trx offset
 269         case "$file_type" in
 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 "$1";;
 274         esac
 275 }
 276
 277 platform_trx_from_chk_cmd() {
 278         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 279
 280         echo -n dd bs=$header_len skip=1
 281 }
 282
 283 platform_trx_from_cybertan_cmd() {
 284         echo -n dd bs=32 skip=1
 285 }
 286
 287 platform_img_from_safeloader() {
 288         local dir="/tmp/sysupgrade-bcm53xx"
 289
 290         # Extract partitions from SafeLoader
 291         rm -fR $dir
 292         mkdir -p $dir
 293         osafeloader extract "$1" \
 294                 -p "os-image" \
 295                 -o $dir/os-image
 296         osafeloader extract "$1" \
 297                 -p "file-system" \
 298                 -o $dir/file-system
 299
 300         mtd write $dir/file-system rootfs
 301
 302         echo -n $dir/os-image
 303 }
 304
 305 platform_img_from_seama() {
 306         local dir="/tmp/sysupgrade-bcm53xx"
 307         local offset=$(oseama info "$1" -e 0 | grep "Entity offset:" | sed "s/.*:\s*//")
 308         local size=$(oseama info "$1" -e 0 | grep "Entity size:" | sed "s/.*:\s*//")
 309
 310         # Busybox doesn't support required iflag-s
 311         # echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
 312
 313         rm -fR $dir
 314         mkdir -p $dir
 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
 317
 318         echo -n $dir/image-entity.bin
 319 }
 320
 321 platform_do_upgrade() {
 322         local file_type=$(platform_identify "$1")
 323         local trx="$1"
 324         local cmd=
 325
 326         [ "$(platform_flash_type)" == "nand" ] && {
 327                 echo "Writing whole image to NAND flash. All erase counters will be lost."
 328         }
 329
 330         case "$file_type" in
 331                 "chk")          cmd=$(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 "$trx");;
 335         esac
 336
 337         default_do_upgrade "$trx" "$cmd"
 338 }