board/freescale/imx28evk/create-boot-sd.sh

   1 #!/bin/sh
   2
   3 set -u
   4 set -e
   5
   6 PROGNAME=$(basename $0)
   7
   8 usage()
   9 {
  10     echo "Create an SD card that boots on an i.MX28 EVK board."
  11     echo
  12     echo "Note: all data on the the card will be completely deleted!"
  13     echo "Use with care!"
  14     echo "Superuser permissions may be required to write to the device."
  15     echo
  16     echo "Usage: ${PROGNAME} <sd_block_device>"
  17     echo "Arguments:"
  18     echo "  <sd_block_device>     The device to be written to"
  19     echo
  20     echo "Example: ${PROGNAME} /dev/mmcblk0"
  21     echo
  22 }
  23
  24 if [ $# -ne 1 ]; then
  25     usage
  26     exit 1
  27 fi
  28
  29 if [ $(id -u) -ne 0 ]; then
  30     echo "${PROGNAME} must be run as root"
  31     exit 1
  32 fi
  33
  34 DEV=${1}
  35
  36 # The partition name prefix depends on the device name:
  37 # - /dev/sde -> /dev/sde1
  38 # - /dev/mmcblk0 -> /dev/mmcblk0p1
  39 if echo ${DEV}|grep -q mmcblk ; then
  40     PART="p"
  41 else
  42     PART=""
  43 fi
  44
  45 PART1=${DEV}${PART}1
  46 PART2=${DEV}${PART}2
  47 PART3=${DEV}${PART}3
  48
  49 # Unmount the partitions if mounted
  50 umount ${PART1} || true
  51 umount ${PART2} || true
  52 umount ${PART3} || true
  53
  54 # First, clear the card
  55 dd if=/dev/zero of=${DEV} bs=1M count=20
  56
  57 sync
  58
  59 # Partition the card.
  60 # SD layout for i.MX28 boot:
  61 # - Special partition type 53 at sector 2048, containing an SD-SB-encapsulated u-boot
  62 # - FAT partition containing zImage
  63 # - ext2/3 partition formatted as ext2 or ext3, containing the root filesystem.
  64 sfdisk --force -u S ${DEV} <<EOF
  65 2048,2000,53
  66 4048,16000,b
  67 20048,,L
  68 EOF
  69
  70 sync
  71
  72 # Copy the bootloader at offset 2048
  73 # (We need to skip the partition table in the .sd, too.)
  74 dd if=output/images/u-boot.sd of=${DEV}1 bs=1M
  75
  76 # Prepare a temp dir for mounting partitions
  77 TMPDIR=$(mktemp -d)
  78
  79 # FAT partition: kernel
  80 mkfs.vfat ${PART2}
  81 mount ${PART2} ${TMPDIR}
  82 cp output/images/*Image ${TMPDIR}/
  83 cp output/images/*.dtb  ${TMPDIR}/ || true
  84 sync
  85 umount ${TMPDIR}
  86
  87 # ext2 partition: root filesystem
  88 mkfs.ext2 ${PART3}
  89 mount ${PART3} ${TMPDIR}
  90 tar -C ${TMPDIR}/ -xf output/images/rootfs.tar
  91 sync
  92 umount ${TMPDIR}
  93
  94 # Cleanup
  95 rmdir ${TMPDIR}
  96 sync
  97 echo Done