target/linux/ar71xx/base-files/lib/upgrade/allnet.sh

   1 # The U-Boot loader of the some Allnet devices requires image sizes and
   2 # checksums to be provided in the U-Boot environment.
   3 # In case the check fails during boot, a failsafe-system is started to provide
   4 # a minimal web-interface for flashing a new firmware.
   5
   6 # create /var/lock for the lock "fw_setenv.lock" of fw_setenv
   7 # the rest is copied using ar71xx's RAMFS_COPY_BIN and RAMFS_COPY_DATA
   8 platform_add_ramfs_ubootenv()
   9 {
  10         mkdir -p $RAM_ROOT/var/lock
  11 }
  12 append sysupgrade_pre_upgrade platform_add_ramfs_ubootenv
  13
  14 # determine size of the main firmware partition
  15 platform_get_firmware_size() {
  16         local dev size erasesize name
  17         while read dev size erasesize name; do
  18                 name=${name#'"'}; name=${name%'"'}
  19                 case "$name" in
  20                         firmware)
  21                                 printf "%d" "0x$size"
  22                                 break
  23                         ;;
  24                 esac
  25         done < /proc/mtd
  26 }
  27
  28 # get the first 4 bytes (magic) of a given file starting at offset in hex format
  29 get_magic_long_at() {
  30         dd if="$1" skip=$(( $CI_BLKSZ / 4 * $2 )) bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
  31 }
  32
  33 get_filesize() {
  34         wc -c "$1" | while read image_size _n ; do echo $image_size ; break; done
  35 }
  36
  37 # scan through the update image pages until matching a magic
  38 platform_get_offset() {
  39         offsetcount=0
  40         magiclong="x"
  41         if [ -n "$3" ]; then
  42                 offsetcount=$3
  43         fi
  44         while magiclong=$( get_magic_long_at "$1" "$offsetcount" ) && [ -n "$magiclong" ]; do
  45                 case "$magiclong" in
  46                         "2705"*)
  47                                 # U-Boot image magic
  48                                 if [ "$2" = "uImage" ]; then
  49                                         echo $offsetcount
  50                                         return
  51                                 fi
  52                         ;;
  53                         "68737173"|"73717368")
  54                                 # SquashFS
  55                                 if [ "$2" = "rootfs" ]; then
  56                                         echo $offsetcount
  57                                         return
  58                                 fi
  59                         ;;
  60                         "deadc0de"|"19852003")
  61                                 # JFFS2 empty page
  62                                 if [ "$2" = "rootfs-data" ]; then
  63                                         echo $offsetcount
  64                                         return
  65                                 fi
  66                         ;;
  67                 esac
  68                 offsetcount=$(( $offsetcount + 1 ))
  69         done
  70 }
  71
  72 platform_check_image_allnet() {
  73         local fw_printenv=/usr/sbin/fw_printenv
  74         [ ! -n "$fw_printenv" -o ! -x "$fw_printenv" ] && {
  75                 echo "Please install uboot-envtools!"
  76                 return 1
  77         }
  78
  79         [ ! -r "/etc/fw_env.config" ] && {
  80                 echo "/etc/fw_env.config is missing"
  81                 return 1
  82         }
  83
  84         local image_size=$( get_filesize "$1" )
  85         local firmware_size=$( platform_get_firmware_size )
  86         [ $image_size -ge $firmware_size ] &&
  87         {
  88                 echo "upgrade image is too big (${image_size}b > ${firmware_size}b)"
  89         }
  90
  91         local vmlinux_blockoffset=$( platform_get_offset "$1" uImage )
  92         [ -z $vmlinux_blockoffset ] && {
  93                 echo "vmlinux-uImage not found"
  94                 return 1
  95         }
  96
  97         local rootfs_blockoffset=$( platform_get_offset "$1" rootfs "$vmlinux_blockoffset" )
  98         [ -z $rootfs_blockoffset ] && {
  99                 echo "missing rootfs"
 100                 return 1
 101         }
 102
 103         local data_blockoffset=$( platform_get_offset "$1" rootfs-data "$rootfs_blockoffset" )
 104         [ -z $data_blockoffset ] && {
 105                 echo "rootfs doesn't have JFFS2 end marker"
 106                 return 1
 107         }
 108
 109         return 0
 110 }
 111
 112 platform_do_upgrade_allnet() {
 113         local firmware_base_addr=$( printf "%d" "$1" )
 114         local vmlinux_blockoffset=$( platform_get_offset "$2" uImage )
 115         if [ ! -n "$vmlinux_blockoffset" ]; then
 116                 echo "can't determine uImage offset"
 117                 return 1
 118         fi
 119         local rootfs_blockoffset=$( platform_get_offset "$2" rootfs $(( $vmlinux_blockoffset + 1 )) )
 120         local vmlinux_offset=$(( $vmlinux_blockoffset * $CI_BLKSZ ))
 121         local vmlinux_addr=$(( $firmware_base_addr + $vmlinux_offset ))
 122         local vmlinux_hexaddr=0x$( printf "%08x" "$vmlinux_addr" )
 123         if [ ! -n "$rootfs_blockoffset" ]; then
 124                 echo "can't determine rootfs offset"
 125                 return 1
 126         fi
 127         local rootfs_offset=$(( $rootfs_blockoffset * $CI_BLKSZ ))
 128         local rootfs_addr=$(( $firmware_base_addr + $rootfs_offset ))
 129         local rootfs_hexaddr=0x$( printf "%08x" "$rootfs_addr" )
 130         local vmlinux_blockcount=$(( $rootfs_blockoffset - $vmlinux_blockoffset ))
 131         local vmlinux_size=$(( $rootfs_offset - $vmlinux_offset ))
 132         local vmlinux_hexsize=0x$( printf "%08x" "$vmlinux_size" )
 133         local data_blockoffset=$( platform_get_offset "$2" rootfs-data $(( $rootfs_blockoffset + 1 )) )
 134         if [ ! -n "$data_blockoffset" ]; then
 135                 echo "can't determine rootfs size"
 136                 return 1
 137         fi
 138         local data_offset=$(( $data_blockoffset * $CI_BLKSZ ))
 139         local rootfs_blockcount=$(( $data_blockoffset - $rootfs_blockoffset ))
 140         local rootfs_size=$(( $data_offset - $rootfs_offset ))
 141         local rootfs_hexsize=0x$( printf "%08x" "$rootfs_size" )
 142
 143         local rootfs_md5=$( dd if="$2" bs=$CI_BLKSZ skip=$rootfs_blockoffset count=$rootfs_blockcount 2>/dev/null | md5sum -); rootfs_md5="${rootfs_md5%% *}"
 144         local vmlinux_md5=$( dd if="$2" bs=$CI_BLKSZ skip=$vmlinux_blockoffset count=$vmlinux_blockcount 2>/dev/null | md5sum -); vmlinux_md5="${vmlinux_md5%% *}"
 145         # this needs a recent version of uboot-envtools!
 146         cat >/tmp/fw_env_upgrade <<EOF
 147 vmlinux_start_addr $vmlinux_hexaddr
 148 vmlinux_size $vmlinux_hexsize
 149 vmlinux_checksum $vmlinux_md5
 150 rootfs_start_addr $rootfs_hexaddr
 151 rootfs_size $rootfs_hexsize
 152 rootfs_checksum $rootfs_md5
 153 bootcmd bootm $vmlinux_hexaddr
 154 EOF
 155         fw_setenv -s /tmp/fw_env_upgrade || {
 156                 echo "failed to update U-Boot environment"
 157                 return 1
 158         }
 159         shift
 160         default_do_upgrade "$@"
 161 }