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 "$machine" in
  27                 "dlink,dir-885l")       echo "seama wrgac42_dlink.2015_dir885l"; return;;
  28                 "netgear,r6250v1")      echo "chk U12H245T00_NETGEAR"; return;;
  29                 "netgear,r6300v2")      echo "chk U12H240T00_NETGEAR"; return;;
  30                 "netgear,r7000")        echo "chk U12H270T00_NETGEAR"; return;;
  31                 "netgear,r8000")        echo "chk U12H315T00_NETGEAR"; return;;
  32                 "netgear,r8500")        echo "chk U12H334T00_NETGEAR"; return;;
  33         esac
  34 }
  35
  36 platform_identify() {
  37         local magic
  38
  39         magic=$(get_magic_long "$1")
  40         case "$magic" in
  41                 "48445230")
  42                         echo "trx"
  43                         return
  44                         ;;
  45                 "2a23245e")
  46                         echo "chk"
  47                         return
  48                         ;;
  49                 "5ea3a417")
  50                         echo "seama"
  51                         return
  52                         ;;
  53         esac
  54
  55         magic=$(get_magic_long_at "$1" 14)
  56         [ "$magic" = "55324e44" ] && {
  57                 echo "cybertan"
  58                 return
  59         }
  60
  61         echo "unknown"
  62 }
  63
  64 platform_check_image() {
  65         [ "$#" -gt 1 ] && return 1
  66
  67         local file_type=$(platform_identify "$1")
  68         local magic
  69         local error=0
  70
  71         case "$file_type" in
  72                 "chk")
  73                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  74                         local board_id_len=$(($header_len - 40))
  75                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  76                         local dev_board_id=$(platform_expected_image)
  77                         echo "Found CHK image with device board_id $board_id"
  78
  79                         [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
  80                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  81                                 error=1
  82                         }
  83
  84                         if ! otrx check "$1" -o "$header_len"; then
  85                                 echo "No valid TRX firmware in the CHK image"
  86                                 error=1
  87                         fi
  88                 ;;
  89                 "cybertan")
  90                         local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  91                         local dev_pattern=$(platform_expected_image)
  92                         echo "Found CyberTAN image with device pattern: $pattern"
  93
  94                         [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
  95                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
  96                                 error=1
  97                         }
  98
  99                         if ! otrx check "$1" -o 32; then
 100                                 echo "No valid TRX firmware in the CyberTAN image"
 101                                 error=1
 102                         fi
 103                 ;;
 104                 "seama")
 105                         local img_signature=$(oseama info "$1" | grep "Meta entry:.*signature=" | sed "s/.*=//")
 106                         local dev_signature=$(platform_expected_image)
 107                         echo "Found Seama image with device signature: $img_signature"
 108
 109                         [ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
 110                                 echo "Firmware signature doesn't match device signature ($dev_signature)"
 111                                 error=1
 112                         }
 113
 114                         $(oseama info "$1" -e 0 | grep -q "Meta entry:.*type=firmware") || {
 115                                 echo "Seama container doesn't have firmware entity"
 116                                 error=1
 117                         }
 118                 ;;
 119                 "trx")
 120                         if ! otrx check "$1"; then
 121                                 echo "Invalid (corrupted?) TRX firmware"
 122                                 error=1
 123                         fi
 124                 ;;
 125                 *)
 126                         echo "Invalid image type. Please use only .trx files"
 127                         error=1
 128                 ;;
 129         esac
 130
 131         return $error
 132 }
 133
 134 platform_pre_upgrade() {
 135         export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/bin/oseama /bin/sed"
 136
 137         local file_type=$(platform_identify "$1")
 138         local dir="/tmp/sysupgrade-bcm53xx"
 139         local trx="$1"
 140         local offset
 141
 142         [ "$(platform_flash_type)" != "nand" ] && return
 143
 144         # Find trx offset
 145         case "$file_type" in
 146                 "chk")          offset=$((0x$(get_magic_long_at "$1" 4)));;
 147                 "cybertan")     offset=32;;
 148                 "seama")        return;;
 149         esac
 150
 151         # Extract partitions from trx
 152         rm -fR $dir
 153         mkdir -p $dir
 154         otrx extract "$trx" \
 155                 ${offset:+-o $offset} \
 156                 -1 $dir/kernel \
 157                 -2 $dir/root
 158         [ $? -ne 0 ] && {
 159                 echo "Failed to extract TRX partitions."
 160                 return
 161         }
 162
 163         # Firmwares without UBI image should be flashed "normally"
 164         local root_type=$(identify $dir/root)
 165         [ "$root_type" != "ubi" ] && {
 166                 echo "Provided firmware doesn't use UBI for rootfs."
 167                 return
 168         }
 169
 170         # Prepare TRX file with just a kernel that will replace current one
 171         local linux_length=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
 172         [ -z "$linux_length" ] && {
 173                 echo "Unable to find \"linux\" partition size"
 174                 exit 1
 175         }
 176         linux_length=$((0x$linux_length))
 177         local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
 178         [ $kernel_length -gt $linux_length ] && {
 179                 echo "New kernel doesn't fit \"linux\" partition."
 180                 return
 181         }
 182         rm -f /tmp/null.bin
 183         rm -f /tmp/kernel.trx
 184         touch /tmp/null.bin
 185         otrx create /tmp/kernel.trx \
 186                 -f $dir/kernel -b $(($linux_length + 28)) \
 187                 -f /tmp/null.bin
 188         [ $? -ne 0 ] && {
 189                 echo "Failed to create simple TRX with new kernel."
 190                 return
 191         }
 192
 193         # Prepare UBI image (drop unwanted extra blocks)
 194         local ubi_length=0
 195         while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 196                 ubi_length=$(($ubi_length + 131072))
 197         done
 198         dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
 199         [ $? -ne 0 ] && {
 200                 echo "Failed to prepare new UBI image."
 201                 return
 202         }
 203
 204         # Flash
 205         mtd write /tmp/kernel.trx firmware
 206         nand_do_upgrade /tmp/root.ubi
 207 }
 208
 209 platform_trx_from_chk_cmd() {
 210         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 211
 212         echo -n dd bs=$header_len skip=1
 213 }
 214
 215 platform_trx_from_cybertan_cmd() {
 216         echo -n dd bs=32 skip=1
 217 }
 218
 219 platform_img_from_seama() {
 220         local dir="/tmp/sysupgrade-bcm53xx"
 221         local offset=$(oseama info "$1" -e 0 | grep "Entity offset:" | sed "s/.*:\s*//")
 222         local size=$(oseama info "$1" -e 0 | grep "Entity size:" | sed "s/.*:\s*//")
 223
 224         # Busybox doesn't support required iflag-s
 225         # echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
 226
 227         rm -fR $dir
 228         mkdir -p $dir
 229         dd if="$1" of=$dir/image-noheader.bin bs=$offset skip=1
 230         dd if=$dir/image-noheader.bin of=$dir/image-entity.bin bs=$size count=1
 231
 232         echo -n $dir/image-entity.bin
 233 }
 234
 235 platform_do_upgrade() {
 236         local file_type=$(platform_identify "$1")
 237         local trx="$1"
 238         local cmd=
 239
 240         [ "$(platform_flash_type)" == "nand" ] && {
 241                 echo "Writing whole image to NAND flash. All erase counters will be lost."
 242         }
 243
 244         case "$file_type" in
 245                 "chk")          cmd=$(platform_trx_from_chk_cmd "$trx");;
 246                 "cybertan")     cmd=$(platform_trx_from_cybertan_cmd "$trx");;
 247                 "seama")        trx=$(platform_img_from_seama "$trx");;
 248         esac
 249
 250         default_do_upgrade "$trx" "$cmd"
 251 }