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         echo "unknown"
  63 }
  64
  65 platform_check_image() {
  66         [ "$#" -gt 1 ] && return 1
  67
  68         local file_type=$(platform_identify "$1")
  69         local magic
  70         local error=0
  71
  72         case "$file_type" in
  73                 "chk")
  74                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  75                         local board_id_len=$(($header_len - 40))
  76                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  77                         local dev_board_id=$(platform_expected_image)
  78                         echo "Found CHK image with device board_id $board_id"
  79
  80                         [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
  81                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  82                                 error=1
  83                         }
  84
  85                         if ! otrx check "$1" -o "$header_len"; then
  86                                 echo "No valid TRX firmware in the CHK image"
  87                                 error=1
  88                         fi
  89                 ;;
  90                 "cybertan")
  91                         local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  92                         local dev_pattern=$(platform_expected_image)
  93                         echo "Found CyberTAN image with device pattern: $pattern"
  94
  95                         [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
  96                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
  97                                 error=1
  98                         }
  99
 100                         if ! otrx check "$1" -o 32; then
 101                                 echo "No valid TRX firmware in the CyberTAN image"
 102                                 error=1
 103                         fi
 104                 ;;
 105                 "seama")
 106                         local img_signature=$(oseama info "$1" | grep "Meta entry:.*signature=" | sed "s/.*=//")
 107                         local dev_signature=$(platform_expected_image)
 108                         echo "Found Seama image with device signature: $img_signature"
 109
 110                         [ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
 111                                 echo "Firmware signature doesn't match device signature ($dev_signature)"
 112                                 error=1
 113                         }
 114
 115                         $(oseama info "$1" -e 0 | grep -q "Meta entry:.*type=firmware") || {
 116                                 echo "Seama container doesn't have firmware entity"
 117                                 error=1
 118                         }
 119                 ;;
 120                 "trx")
 121                         if ! otrx check "$1"; then
 122                                 echo "Invalid (corrupted?) TRX firmware"
 123                                 error=1
 124                         fi
 125                 ;;
 126                 *)
 127                         echo "Invalid image type. Please use only .trx files"
 128                         error=1
 129                 ;;
 130         esac
 131
 132         return $error
 133 }
 134
 135 platform_pre_upgrade() {
 136         export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/bin/oseama /bin/sed"
 137
 138         local file_type=$(platform_identify "$1")
 139         local dir="/tmp/sysupgrade-bcm53xx"
 140         local trx="$1"
 141         local offset
 142
 143         [ "$(platform_flash_type)" != "nand" ] && return
 144
 145         # Find trx offset
 146         case "$file_type" in
 147                 "chk")          offset=$((0x$(get_magic_long_at "$1" 4)));;
 148                 "cybertan")     offset=32;;
 149                 "seama")        return;;
 150         esac
 151
 152         # Extract partitions from trx
 153         rm -fR $dir
 154         mkdir -p $dir
 155         otrx extract "$trx" \
 156                 ${offset:+-o $offset} \
 157                 -1 $dir/kernel \
 158                 -2 $dir/root
 159         [ $? -ne 0 ] && {
 160                 echo "Failed to extract TRX partitions."
 161                 return
 162         }
 163
 164         # Firmwares without UBI image should be flashed "normally"
 165         local root_type=$(identify $dir/root)
 166         [ "$root_type" != "ubi" ] && {
 167                 echo "Provided firmware doesn't use UBI for rootfs."
 168                 return
 169         }
 170
 171         # Prepare TRX file with just a kernel that will replace current one
 172         local linux_length=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
 173         [ -z "$linux_length" ] && {
 174                 echo "Unable to find \"linux\" partition size"
 175                 exit 1
 176         }
 177         linux_length=$((0x$linux_length))
 178         local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
 179         [ $kernel_length -gt $linux_length ] && {
 180                 echo "New kernel doesn't fit \"linux\" partition."
 181                 return
 182         }
 183         rm -f /tmp/null.bin
 184         rm -f /tmp/kernel.trx
 185         touch /tmp/null.bin
 186         otrx create /tmp/kernel.trx \
 187                 -f $dir/kernel -b $(($linux_length + 28)) \
 188                 -f /tmp/null.bin
 189         [ $? -ne 0 ] && {
 190                 echo "Failed to create simple TRX with new kernel."
 191                 return
 192         }
 193
 194         # Prepare UBI image (drop unwanted extra blocks)
 195         local ubi_length=0
 196         while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 197                 ubi_length=$(($ubi_length + 131072))
 198         done
 199         dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
 200         [ $? -ne 0 ] && {
 201                 echo "Failed to prepare new UBI image."
 202                 return
 203         }
 204
 205         # Flash
 206         mtd write /tmp/kernel.trx firmware
 207         nand_do_upgrade /tmp/root.ubi
 208 }
 209
 210 platform_trx_from_chk_cmd() {
 211         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 212
 213         echo -n dd bs=$header_len skip=1
 214 }
 215
 216 platform_trx_from_cybertan_cmd() {
 217         echo -n dd bs=32 skip=1
 218 }
 219
 220 platform_img_from_seama() {
 221         local dir="/tmp/sysupgrade-bcm53xx"
 222         local offset=$(oseama info "$1" -e 0 | grep "Entity offset:" | sed "s/.*:\s*//")
 223         local size=$(oseama info "$1" -e 0 | grep "Entity size:" | sed "s/.*:\s*//")
 224
 225         # Busybox doesn't support required iflag-s
 226         # echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
 227
 228         rm -fR $dir
 229         mkdir -p $dir
 230         dd if="$1" of=$dir/image-noheader.bin bs=$offset skip=1
 231         dd if=$dir/image-noheader.bin of=$dir/image-entity.bin bs=$size count=1
 232
 233         echo -n $dir/image-entity.bin
 234 }
 235
 236 platform_do_upgrade() {
 237         local file_type=$(platform_identify "$1")
 238         local trx="$1"
 239         local cmd=
 240
 241         [ "$(platform_flash_type)" == "nand" ] && {
 242                 echo "Writing whole image to NAND flash. All erase counters will be lost."
 243         }
 244
 245         case "$file_type" in
 246                 "chk")          cmd=$(platform_trx_from_chk_cmd "$trx");;
 247                 "cybertan")     cmd=$(platform_trx_from_cybertan_cmd "$trx");;
 248                 "seama")        trx=$(platform_img_from_seama "$trx");;
 249         esac
 250
 251         default_do_upgrade "$trx" "$cmd"
 252 }