Goal

A script to run after the microSDHC has been partitioned properly for the gumstix overo to install the over-image of choice from a host system.

In the case that the script runs on the overo:

sudo install-overo-image-to-sdhc.sh /dev/mmcblk0

In the case that the script runs on another Linux box:

sudo install-overo-image-to-sdhc.sh /dev/sdf

Pre-Requisists

The host (server) system should have already run bitbake omap3-console-image
The microSDHC should have been partitioned appropriately

Script

install-overo-image-to-sdhc.env

There are quite a few variables here - more than just the card to install to.

/usr/local/bin/install-overo-image-to-sdhc.env:

# About the host system
USER=harry
HOST=192.168.1.20
PORT=22
export SCP_HOST="-P ${PORT} ${USER}@${HOST}"
export NET_CONF=/home/${USER}/Code/development/main/overo/etc/network/interfaces


# Where ~/overo-oe can be found
OE_PATH=/home/${USER}
export OVERO_PATH=${OE_PATH}/overo-oe/tmp/deploy/glibc/images/overo


# Boot options
KERNEL=''
FORMAT=tar.bz2
export MLO=${OVERO_PATH}/MLO-overo
export UBOOT=${OVERO_PATH}/u-boot-overo.bin
export UIMAGE=${OVERO_PATH}/uImage-${KERNEL}overo.bin
export ROOTFS=omap3-console-image-overo.${FORMAT}


# Create the environment for this script
export MNT=/mnt/overo_tmp


# NOTE /dev/shm is way faster but may not be available once the filesystem size is large
# TODO TMDIR should not be allowed to be MNT
# TODO this script should not run from MNT
export TMPDIR=/dev/shm

/usr/local/bin/install-overo-image-to-sdhc.sh:

#!/bin/bash
#http://www.gumstix.net/Setup-and-Programming/view/Overo-Setup-and-Programming/Creating-a-bootable-microSD-card/111.html

# set this script to exit at any point an operation returns failure
set -e

# Create the environment for this script
source install-overo-image-to-sdhc.env

DEV=$1
DEFAULT_DEV=/dev/mmcblk0
IS_OVERO=`cat /proc/cpuinfo | grep Overo || true`
IS_MMCBLK=`echo ${DEV} | grep /dev/mmcblk || true`

if [ ! -n "${DEV}" ]
then
  if [ -n "${IS_OVERO}" ]
  then
    echo "About to format (DESTROY data) ${DEFAULT_DEV}"
    DEV=${DEFAULT_DEV}
    echo "CTRL+C now if that's not what you wanted..."
    sleep 3
    echo "continuing..."
  else
    echo -n 'Usage: `'$0' /dev/MICRO_SDHC_BLOCK_DEVICE`'
    exit 1;
  fi
fi

# About the target system
# Matches mmcblk0p1 disk0s1 sdf1 - OpenEmbedded, Ubuntu, BSD
BOOT=${DEV}'*1'
ROOT=${DEV}'*2'


# Attempt to ensure that the disk is not in use
umount $DEV* 2>/dev/null || true
umount $DEV* 2>/dev/null || true

# Ready the mount point
umount $MNT || true
rm -rf $MNT
mkdir -p $MNT


# TODO this will fail due to -P
# TODO give overo units a sandboxed ssh key 
# or use curl to initiate a reverse connection
# ssh-copy-id $SCP_HOST

# Prepare FAT boot partition
# MLO *must* be installed first
mkfs.vfat -F 32 $BOOT -n FAT
mount $BOOT $MNT
scp $SCP_HOST:$MLO $MNT/MLO
scp $SCP_HOST:$UBOOT $MNT/u-boot.bin
scp $SCP_HOST:$UIMAGE $MNT/uImage
echo "sync-ing... this may take several seconds"
umount $MNT
umount $BOOT 2>/dev/null || true # overo auto-mounts in /media sometimes


# Prepare rootfs
mkfs.ext3 ${ROOT}
mount ${ROOT} /${MNT}
scp ${SCP_HOST}:${OVERO_PATH}/${ROOTFS} ${TMPDIR}/${ROOTFS}
tar xvjf ${TMPDIR}/${ROOTFS} -C $MNT #BAH! Takes forever!
rm ${TMPDIR}/${ROOTFS}


# Configure rootfs with any special sauce we might need
scp ${SCP_HOST}:${NET_CONF} ${MNT}/etc/network/
ln -s "/sbin/dhclient" ${MNT}/sbin/dhclient3 2>/dev/null || true
ln -s "/var/lib/dhcp" ${MNT}/var/lib/dhcp3 2>/dev/null || true


# sync and umount
echo "sync-ing... this may take several minutes"
umount $MNT
umount $ROOT 2>/dev/null || true


# Cleanup any mess we madermdir $MNT || true
#rm -rf $MNT

# sync and reboot!
sync
sync
#echo 1 > /proc/sys/kernel/sysrq

echo "copied sd card successfully"


# if the process fails, enter uboot and `run nandboot` to boot the nand rather than the sd card
# Kernel from NAND, RootFS from MMC
# setenv bootargs console=${console} mpurate=${mpurate} vram=${vram} omapfb.mode=dvi:${dvimode} omapfb.debug=y omapdss.def_disp=${defaultdisplay} root=${mmcroot} rootfstype=${mmcrootfstype}
# setenv bootargs console=${console} mpurate=${mpurate} vram=${vram} omapfb.mode=dvi:${dvimode} omapfb.debug=y omapdss.def_disp=${defaultdisplay} root=${mmcroot} rootfstype=${mmcrootfstype}
# nand read ${loadaddr} 280000 400000; bootm ${loadaddr}
# the first boot takes forever to load
# mixedboot=echo Kernel on nand, RootFS on mmc...; run mmcargs; nand read ${loadaddr} 280000 400000; bootm ${loadaddr}

Updated at 2010-07-30

[Home] Format MicroSDHC for Gumstix Overo

Goal

Pre-Requisists

Script

install-overo-image-to-sdhc.env