target/linux/mvebu/cortexa72/base-files/lib/upgrade/emmc-puzzle.sh

   1 platform_do_upgrade_emmc() {
   2         local board=$(board_name)
   3         local diskdev partdev
   4
   5         export_bootdevice && export_partdevice diskdev 0 || {
   6                 v "Unable to determine upgrade device"
   7                 return 1
   8         }
   9         sync
  10         if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
  11                 get_partitions "/dev/$diskdev" bootdisk
  12                 v "Extract boot sector from the image"
  13                 get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b
  14                 get_partitions /tmp/image.bs image
  15         fi
  16
  17         #iterate over each partition from the image and write it to the boot disk
  18         while read part start size; do
  19                 if export_partdevice partdev $part; then
  20                         if [ "$partdev" = "mmcblk0p2" ]; then
  21                                 v "Writing image mmcblk0p3 for /dev/$partdev  $start $size"
  22                                 get_image_dd "$1" of="/dev/mmcblk0p3" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
  23                         elif [ "$partdev" = "mmcblk0p1" ]; then
  24                                 v "Writing image mmcblk0p1 for /dev/$partdev $start $size"
  25                                 get_image_dd "$1" of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
  26                         fi
  27                 else
  28                         v "Unable to find partition $part device, skipped."
  29                 fi
  30         done < /tmp/partmap.image
  31
  32         v "Writing new UUID to /dev/$diskdev..."
  33         get_image_dd "$1" of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
  34
  35         sleep 1
  36 }