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