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         [ "$#" -gt 1 ] && return 1
  59
  60         local file_type=$(platform_identify "$1")
  61         local magic
  62         local error=0
  63
  64         case "$file_type" in
  65                 "chk")
  66                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  67                         local board_id_len=$(($header_len - 40))
  68                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  69                         local dev_board_id=$(platform_expected_image)
  70                         echo "Found CHK image with device board_id $board_id"
  71
  72                         [ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
  73                                 echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
  74                                 error=1
  75                         }
  76
  77                         if ! otrx check "$1" -o "$header_len"; then
  78                                 echo "No valid TRX firmware in the CHK image"
  79                                 error=1
  80                         fi
  81                 ;;
  82                 "cybertan")
  83                         local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  84                         local dev_pattern=$(platform_expected_image)
  85                         echo "Found CyberTAN image with device pattern: $pattern"
  86
  87                         [ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
  88                                 echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
  89                                 error=1
  90                         }
  91
  92                         if ! otrx check "$1" -o 32; then
  93                                 echo "No valid TRX firmware in the CyberTAN image"
  94                                 error=1
  95                         fi
  96                 ;;
  97                 "trx")
  98                         if ! otrx check "$1"; then
  99                                 echo "Invalid (corrupted?) TRX firmware"
 100                                 error=1
 101                         fi
 102                 ;;
 103                 *)
 104                         echo "Invalid image type. Please use only .trx files"
 105                         error=1
 106                 ;;
 107         esac
 108
 109         return $error
 110 }
 111
 112 platform_extract_trx_from_chk() {
 113         local header_len=$((0x$(get_magic_long_at "$1" 4)))
 114
 115         dd if="$1" of="$2" bs=$header_len skip=1
 116 }
 117
 118 platform_extract_trx_from_cybertan() {
 119         dd if="$1" of="$2" bs=32 skip=1
 120 }
 121
 122 platform_pre_upgrade() {
 123         local file_type=$(platform_identify "$1")
 124         local dir="/tmp/sysupgrade-bcm53xx"
 125         local trx="$1"
 126         local offset
 127
 128         [ "$(platform_flash_type)" != "nand" ] && return
 129
 130         # Find trx offset
 131         case "$file_type" in
 132                 "chk")          offset=$((0x$(get_magic_long_at "$1" 4)));;
 133                 "cybertan")     offset=32;;
 134         esac
 135
 136         # Extract partitions from trx
 137         rm -fR $dir
 138         mkdir -p $dir
 139         otrx extract "$trx" \
 140                 ${offset:+-o $offset} \
 141                 -1 $dir/kernel \
 142                 -2 $dir/root
 143
 144         # Firmwares without UBI image should be flashed "normally"
 145         local root_type=$(identify $dir/root)
 146         [ "$root_type" != "ubi" ] && {
 147                 echo "Provided firmware doesn't use UBI for rootfs."
 148                 return
 149         }
 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$linux_length))
 158         local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
 159         [ $kernel_length -gt $linux_length ] && {
 160                 echo "New kernel doesn't fit \"linux\" partition."
 161                 return
 162         }
 163         rm -f /tmp/null.bin
 164         rm -f /tmp/kernel.trx
 165         touch /tmp/null.bin
 166         otrx create /tmp/kernel.trx \
 167                 -f $dir/kernel -b $(($linux_length + 28)) \
 168                 -f /tmp/null.bin
 169
 170         # Prepare UBI image (drop unwanted extra blocks)
 171         local ubi_length=0
 172         while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
 173                 ubi_length=$(($ubi_length + 131072))
 174         done
 175         dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
 176
 177         # Flash
 178         mtd write /tmp/kernel.trx firmware
 179         nand_do_upgrade /tmp/root.ubi
 180 }
 181
 182 platform_do_upgrade() {
 183         local file_type=$(platform_identify "$1")
 184         local trx="$1"
 185
 186         [ "$(platform_flash_type)" == "nand" ] && {
 187                 echo "Writing whole image to NAND flash. All erase counters will be lost."
 188         }
 189
 190         case "$file_type" in
 191                 "chk")          trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_chk "$1" "$trx";;
 192                 "cybertan")     trx="/tmp/$(basename $1).trx"; platform_extract_trx_from_cybertan "$1" "$trx";;
 193         esac
 194
 195         shift
 196         default_do_upgrade "$trx" "$@"
 197 }