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 "$machine" in
  27                 "dlink,dir-885l")       echo "seama wrgac42_dlink.2015_dir885l"; return;;
  28                 "netgear,r6250v1")      echo "chk U12H245T00_NETGEAR"; return;;
  29                 "netgear,r6300v2")      echo "chk U12H240T00_NETGEAR"; return;;
  30                 "netgear,r7000")        echo "chk U12H270T00_NETGEAR"; return;;
  31                 "netgear,r7900")        echo "chk U12H315T30_NETGEAR"; return;;
  32                 "netgear,r8000")        echo "chk U12H315T00_NETGEAR"; return;;
  33                 "netgear,r8500")        echo "chk U12H334T00_NETGEAR"; return;;
  34                 "tplink,archer-c9-v1")  echo "safeloader"; return;;
  35         esac
  36 }
  37
  38 platform_identify() {
  39         local magic
  40
  41         magic=$(get_magic_long "$1")
  42         case "$magic" in
  43                 "48445230")
  44                         echo "trx"
  45                         return
  46                         ;;
  47                 "2a23245e")
  48                         echo "chk"
  49                         return
  50                         ;;
  51                 "5ea3a417")
  52                         echo "seama"
  53                         return
  54                         ;;
  55         esac
  56
  57         magic=$(get_magic_long_at "$1" 14)
  58         [ "$magic" = "55324e44" ] && {
  59                 echo "cybertan"
  60                 return
  61         }
  62
  63         if osafeloader info "$1" > /dev/null; then
  64                 echo "safeloader"
  65                 return
  66         fi
  67
  68         echo "unknown"
  69 }
  70
  71 platform_check_image() {
  72         [ "$#" -gt 1 ] && return 1
  73
  74         local file_type=$(platform_identify "$1")
  75         local magic
  76         local error=0
  77
  78         case "$file_type" in
  79                 "chk")
  80                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  81                         local board_id_len=$(($header_len - 40))
  82                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  83                         local dev_board_id=$(platform_expected_image)
  84                         echo "Found CHK image with device board_id $board_id"
  85
  86                         [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
  87                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  88                                 error=1
  89                         }
  90
  91                         if ! otrx check "$1" -o "$header_len"; then
  92                                 echo "No valid TRX firmware in the CHK image"
  93                                 error=1
  94                         fi
  95                 ;;
  96                 "cybertan")
  97                         local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  98                         local dev_pattern=$(platform_expected_image)
  99                         echo "Found CyberTAN image with device pattern: $pattern"
 100
 101                         [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
 102                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
 103                                 error=1
 104                         }
 105
 106                         if ! otrx check "$1" -o 32; then
 107                                 echo "No valid TRX firmware in the CyberTAN image"
 108                                 error=1
 109                         fi
 110                 ;;
 111                 "safeloader")
 112                 ;;
 113                 "seama")
 114                         local img_signature=$(oseama info "$1" | grep "Meta entry:.*signature=" | sed "s/.*=//")
 115                         local dev_signature=$(platform_expected_image)
 116                         echo "Found Seama image with device signature: $img_signature"
 117
 118                         [ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
 119                                 echo "Firmware signature doesn't match device signature ($dev_signature)"
 120                                 error=1
 121                         }
 122
 123                         $(oseama info "$1" -e 0 | grep -q "Meta entry:.*type=firmware") || {
 124                                 echo "Seama container doesn't have firmware entity"
 125                                 error=1
 126                         }
 127                 ;;
 128                 "trx")
 129                         local expected=$(platform_expected_image)
 130
 131                         [ "$expected" == "safeloader" ] && {
 132                                 echo "This device expects SafeLoader format and may not work with TRX"
 133                                 error=1
 134                         }
 135
 136                         if ! otrx check "$1"; then
 137                                 echo "Invalid (corrupted?) TRX firmware"
 138                                 error=1
 139                         fi
 140                 ;;
 141                 *)
 142                         echo "Invalid image type. Please use only .trx files"
 143                         error=1
 144                 ;;
 145         esac
 146
 147         return $error
 148 }
 149
 150 # $(1): image for upgrade (with possible extra header)
 151 # $(2): offset of trx in image
 152 platform_pre_upgrade_trx() {
 153         local dir="/tmp/sysupgrade-bcm53xx"
 154         local trx="$1"
 155         local offset="$2"
 156
 157         # Extract partitions from trx
 158         rm -fR $dir
 159         mkdir -p $dir
 160         otrx extract "$trx" \
 161                 ${offset:+-o $offset} \
 162                 -1 $dir/kernel \
 163                 -2 $dir/root
 164         [ $? -ne 0 ] && {
 165                 echo "Failed to extract TRX partitions."
 166                 return
 167         }
 168
 169         # Firmwares without UBI image should be flashed "normally"
 170         local root_type=$(identify $dir/root)
 171         [ "$root_type" != "ubi" ] && {
 172                 echo "Provided firmware doesn't use UBI for rootfs."
 173                 return
 174         }
 175
 176         # Prepare TRX file with just a kernel that will replace current one
 177         local linux_length=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
 178         [ -z "$linux_length" ] && {
 179                 echo "Unable to find \"linux\" partition size"
 180                 exit 1
 181         }
 182         linux_length=$((0x$linux_length))
 183         local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
 184         [ $kernel_length -gt $linux_length ] && {
 185                 echo "New kernel doesn't fit \"linux\" partition."
 186                 return
 187         }
 188         rm -f /tmp/null.bin
 189         rm -f /tmp/kernel.trx
 190         touch /tmp/null.bin
 191         otrx create /tmp/kernel.trx \
 192                 -f $dir/kernel -b $(($linux_length + 28)) \
 193                 -f /tmp/null.bin
 194         [ $? -ne 0 ] && {
 195                 echo "Failed to create simple TRX with new kernel."
 196                 return
 197         }
 198
 199         # Prepare UBI image (drop unwanted extra blocks)
 200         local ubi_length=0
 201         while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 202                 ubi_length=$(($ubi_length + 131072))
 203         done
 204         dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
 205         [ $? -ne 0 ] && {
 206                 echo "Failed to prepare new UBI image."
 207                 return
 208         }
 209
 210         # Flash
 211         mtd write /tmp/kernel.trx firmware
 212         nand_do_upgrade /tmp/root.ubi
 213 }
 214
 215 platform_pre_upgrade_seama() {
 216         local dir="/tmp/sysupgrade-bcm53xx"
 217         local seama="$1"
 218         local tmp
 219
 220         # Extract Seama entity from Seama seal
 221         rm -fR $dir
 222         mkdir -p $dir
 223         oseama extract "$seama" \
 224                 -e 0 \
 225                 -o $dir/seama.entity
 226         [ $? -ne 0 ] && {
 227                 echo "Failed to extract Seama entity."
 228                 return
 229         }
 230         local entity_size=$(wc -c $dir/seama.entity | cut -d ' ' -f 1)
 231
 232         local ubi_offset=0
 233         tmp=0
 234         while [ 1 ]; do
 235                 [ $tmp -ge $entity_size ] && break
 236                 [ "$(dd if=$dir/seama.entity skip=$tmp bs=1 count=4 2>/dev/null)" = "UBI#" ] && {
 237                         ubi_offset=$tmp
 238                         break
 239                 }
 240                 tmp=$(($tmp + 131072))
 241         done
 242         [ $ubi_offset -eq 0 ] && {
 243                 echo "Failed to find UBI in Seama entity."
 244                 return
 245         }
 246
 247         local ubi_length=0
 248         while [ "$(dd if=$dir/seama.entity skip=$(($ubi_offset + $ubi_length)) bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 249                 ubi_length=$(($ubi_length + 131072))
 250         done
 251
 252         dd if=$dir/seama.entity of=$dir/kernel.seama bs=131072 count=$(($ubi_offset / 131072)) 2>/dev/null
 253         dd if=$dir/seama.entity of=$dir/root.ubi bs=131072 skip=$(($ubi_offset / 131072)) count=$(($ubi_length / 131072)) 2>/dev/null
 254
 255         # Flash
 256         local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"\(kernel\|linux\)".*/\1/p' /proc/mtd)
 257         mtd write $dir/kernel.seama firmware
 258         mtd ${kernel_size:+-c 0x$kernel_size} fixseama firmware
 259         nand_do_upgrade $dir/root.ubi
 260 }
 261
 262 platform_pre_upgrade() {
 263         export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/bin/osafeloader /usr/bin/oseama /bin/sed"
 264
 265         local file_type=$(platform_identify "$1")
 266
 267         [ "$(platform_flash_type)" != "nand" ] && return
 268
 269         # Find trx offset
 270         case "$file_type" in
 271                 "chk")          platform_pre_upgrade_trx "$1" $((0x$(get_magic_long_at "$1" 4)));;
 272                 "cybertan")     platform_pre_upgrade_trx "$1" 32;;
 273                 "seama")        platform_pre_upgrade_seama "$1";;
 274                 "trx")          platform_pre_upgrade_trx "$1";;
 275         esac
 276 }
 277
 278 platform_trx_from_chk_cmd() {
 279         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 280
 281         echo -n dd bs=$header_len skip=1
 282 }
 283
 284 platform_trx_from_cybertan_cmd() {
 285         echo -n dd bs=32 skip=1
 286 }
 287
 288 platform_img_from_safeloader() {
 289         local dir="/tmp/sysupgrade-bcm53xx"
 290
 291         # Extract partitions from SafeLoader
 292         rm -fR $dir
 293         mkdir -p $dir
 294         osafeloader extract "$1" \
 295                 -p "os-image" \
 296                 -o $dir/os-image
 297         osafeloader extract "$1" \
 298                 -p "file-system" \
 299                 -o $dir/file-system
 300
 301         mtd write $dir/file-system rootfs
 302
 303         echo -n $dir/os-image
 304 }
 305
 306 platform_img_from_seama() {
 307         local dir="/tmp/sysupgrade-bcm53xx"
 308         local offset=$(oseama info "$1" -e 0 | grep "Entity offset:" | sed "s/.*:\s*//")
 309         local size=$(oseama info "$1" -e 0 | grep "Entity size:" | sed "s/.*:\s*//")
 310
 311         # Busybox doesn't support required iflag-s
 312         # echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
 313
 314         rm -fR $dir
 315         mkdir -p $dir
 316         dd if="$1" of=$dir/image-noheader.bin bs=$offset skip=1
 317         dd if=$dir/image-noheader.bin of=$dir/image-entity.bin bs=$size count=1
 318
 319         echo -n $dir/image-entity.bin
 320 }
 321
 322 platform_do_upgrade() {
 323         local file_type=$(platform_identify "$1")
 324         local trx="$1"
 325         local cmd=
 326
 327         [ "$(platform_flash_type)" == "nand" ] && {
 328                 echo "Writing whole image to NAND flash. All erase counters will be lost."
 329         }
 330
 331         case "$file_type" in
 332                 "chk")          cmd=$(platform_trx_from_chk_cmd "$trx");;
 333                 "cybertan")     cmd=$(platform_trx_from_cybertan_cmd "$trx");;
 334                 "safeloader")   trx=$(platform_img_from_safeloader "$trx");;
 335                 "seama")        trx=$(platform_img_from_seama "$trx");;
 336         esac
 337
 338         default_do_upgrade "$trx" "$cmd"
 339 }