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