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