Basic Requirements

ARM Cross Compiler
- Ubuntu (11.04 (Natty Narwhal) minimum): sudo apt-get install gcc-arm-linux-gnueabi
- Linaro: https://launchpad.net/linaro-toolchain-binaries
Bootloader
- Das U-Boot – the Universal Boot Loader http://www.denx.de/wiki/U-Boot
- Source – http://git.denx.de/?p=u-boot.git;a=summary
Linux Kernel
- Linus's Mainline tree: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=summary
- Freescale github bsp: https://github.com/Freescale
- Freescale bsp: http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/
ARM based rootfs
- Debian Squeeze: http://www.debian.org

Bootloader

Das U-Boot – the Universal Boot Loader http://www.denx.de/wiki/U-Boot

U-Boot Download:

Download U-Boot via git:

git clone git://git.denx.de/u-boot.git

cd u-boot/

git checkout v2012.10 -b tmp

U-Boot Patches:

wget https://raw.github.com/RobertCNelson/Bootloader-Builder/master/patches/v2012.10/0001-enable-bootz-support.patch

wget https://raw.github.com/RobertCNelson/Bootloader-Builder/master/patches/v2012.10/0002-imx-convert-to-uEnv.txt-n-fixes.patch

patch -p1 < 0001-enable-bootz-support.patch

patch -p1 < 0002-imx-convert-to-uEnv.txt-n-fixes.patch

U-Boot Configure and Build:

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- distclean

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- mx53loco_config

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-

Linux Kernel

Linux Build Script:

git clone git://github.com/RobertCNelson/imx-devel.git

cd imx-devel

For Mainline Freescales 2.6.35 bsp

git checkout origin/imx-bsp -b imx-bsp

For Mainline v3.4.x (currently no usb/video)

git checkout origin/v3.4.x-imx -b v3.4.x-imx

For Mainline v3.6.x using Device Tree's: (currently no usb/video/sata)

git checkout origin/v3.6.x-imx -b v3.6.x-imx

Run Build Script:

./build_kernel.sh

The kernel zImage and modules will be under the deploy directory.

Debian Squeeze 6.0.6 (armel based) Root File System

Default User: debian
Password: temppwd
Root User: root
Root Password: root

wget -c http://rcn-ee.net/deb/minfs/squeeze/debian-6.0.6-minimal-armel-2012-10-22.tar.xz

verify the image with:

md5sum debian-6.0.6-minimal-armel-2012-10-22.tar.xz

97a4717d95c72d3c9d931a39a3aa58c6  debian-6.0.6-minimal-armel-2012-10-22.tar.xz

Extract Image:

tar xJf debian-6.0.6-minimal-armel-2012-10-22.tar.xz

Debian Wheezy (snapshot) (armhf based) Root File System

Default User: debian
Password: temppwd
Root User: root
Root Password: root

wget -c http://rcn-ee.net/deb/minfs/wheezy/debian-wheezy-minimal-armhf-2012-10-22.tar.xz

verify the image with:

md5sum debian-wheezy-minimal-armhf-2012-10-22.tar.xz

ff409aa856b4b2ab86a6c8126a349926  debian-wheezy-minimal-armhf-2012-10-22.tar.xz

Extract Image:

tar xJf debian-wheezy-minimal-armhf-2012-10-22.tar.xz

Ubuntu 12.10 (Quantal) (armhf based) Root File System

Default User: ubuntu
Password: temppwd

wget -c http://rcn-ee.net/deb/minfs/quantal/ubuntu-12.10-minimal-armhf-2012-10-22.tar.xz

verify the image with:

md5sum ubuntu-12.10-minimal-armhf-2012-10-22.tar.xz

442c3a26af8e80ecf44ea470f5dcacd5  ubuntu-12.10-minimal-armhf-2012-10-22.tar.xz

Extract Image:

tar xJf ubuntu-12.10-minimal-armhf-2012-10-22.tar.xz

Setup microSD card

For these instruction, we are assuming: DISK=/dev/mmcblk0, "sudo fdisk -l" is useful for determining the device id..

export DISK=/dev/mmcblk0

Erase microSD card:

sudo parted --script ${DISK} mklabel msdos

Install U-Boot Bootloader:

sudo dd if=./u-boot/u-boot.imx of=${DISK} seek=1 bs=1024

Create Partition Layout:
boot: ext2, 50Mb in size, starting at 2Mb (to not overwrite the u-boot.imx file)
rootfs: ext3/4, rest of microSD card.

Mount the Boot & Root File System Partitions:

v3.4.x "uEnv.txt" boot script

Create U-Boot "uEnv.txt" boot script: (nano uEnv.txt)

uEnv.txt

initrd_high=0xffffffff

fdt_high=0xffffffff

console=ttymxc0,115200

mmcroot=/dev/mmcblk0p2 ro

mmcrootfstype=ext4 rootwait fixrtc

optargs=console=tty0

video=mxcdi1fb:1280x720M@60

mmc_load_image=ext2load mmc 0:1 0x70010000 zImage

mmc_load_initrd=ext2load mmc 0:1 0x72000000 initrd.img; setenv initrd_size ${filesize}

mmc_load_dtb=ext2load mmc 0:1 0x71ff0000 /dtbs/${dtb_file}

mmcargs=setenv bootargs console=${console} ${optargs} root=${mmcroot} rootfstype=${mmcrootfstype} ${video}

#Just: zImage

xyz_mmcboot=run mmc_load_image; echo Booting from mmc ...

loaduimage=run xyz_mmcboot; run mmcargs; bootz 0x70010000

#zImage and initrd

#xyz_mmcboot=run mmc_load_image; run mmc_load_initrd; echo Booting from mmc ...

#loaduimage=run xyz_mmcboot; run mmcargs; bootz 0x70010000 0x72000000:${initrd_size}

Device Tree "uEnv.txt" boot script v3.6.x

Create U-Boot "uEnv.txt" boot script: (nano uEnv.txt)

uEnv.txt

initrd_high=0xffffffff

fdt_high=0xffffffff

console=ttymxc0,115200

mmcroot=/dev/mmcblk0p2 ro

mmcrootfstype=ext4 rootwait fixrtc

optargs=console=tty0

video=mxcdi1fb:1280x720M@60

mmc_load_image=ext2load mmc 0:1 0x70010000 zImage

mmc_load_initrd=ext2load mmc 0:1 0x72000000 initrd.img; setenv initrd_size ${filesize}

mmc_load_dtb=ext2load mmc 0:1 0x71ff0000 /dtbs/${dtb_file}

mmcargs=setenv bootargs console=${console} ${optargs} root=${mmcroot} rootfstype=${mmcrootfstype} ${video}

#Just: zImage

xyz_mmcboot=run mmc_load_image; run mmc_load_dtb; echo Booting from mmc ...

loaduimage=run xyz_mmcboot; run mmcargs; bootz 0x70010000 - 0x71ff0000

#zImage and initrd

#xyz_mmcboot=run mmc_load_image; run mmc_load_initrd; run mmc_load_dtb; echo Booting from mmc ...

#loaduimage=run xyz_mmcboot; run mmcargs; bootz 0x70010000 0x72000000:${initrd_size} 0x71ff0000

Copy uEnv.txt to the boot partition:

sudo cp -v ./uEnv.txt /media/boot/

Copy Kernel zImage:

sudo cp -v ./imx-devel/deploy/3.6.6-imx2.zImage /media/boot/zImage

Copy Kernel dtbs (Device Tree (v3.6.x++)):

sudo mkdir -p /media/boot/dtbs/

sudo tar xfv ./imx-devel/deploy/3.6.6-imx2-dtbs.tar.gz -C /media/boot/dtbs/

Copy Root File System:

sudo tar xfvp ./*-*-minimal-arm*-*/armel-rootfs-*.tar -C /media/rootfs/

Copy Kernel modules:

sudo tar xfv ./imx-devel/deploy/3.6.6-imx2-modules.tar.gz -C /media/rootfs/

Tweak "/etc/fstab", the defaults should work for most boards:

sudo nano /media/rootfs/etc/fstab

Edit:

/etc/fstab

/dev/mmcblk0p2   /           auto   errors=remount-ro   0   1

/dev/mmcblk0p1   /boot/uboot auto   defaults            0   0

if /dev/mmcblk0p1 is ext2, change last line:

/dev/mmcblk0p1   /boot/uboot auto   defaults            0   2

Enable Networking on Bootup:

Note: Boards without ethernet interfaces will have delays on bootup.

sudo nano /media/rootfs/etc/network/interfaces

From: (uncomment)

/etc/network/interfaces

#auto eth0

#iface eth0 inet dhcp

To:

/etc/network/interfaces

auto eth0

iface eth0 inet dhcp

Enable Serial Login:

Debian:

sudo nano /media/rootfs/etc/inittab

edit last line:

/etc/inittab

from: T2:23:respawn:/sbin/getty -L  115200 vt102

to: T2:23:respawn:/sbin/getty -L ttymxc0 115200 vt102

Ubuntu:

sudo nano /media/rootfs/etc/init/serial.conf

Add:

/etc/init/serial.conf

start on stopped rc RUNLEVEL=[2345]

stop on runlevel [!2345]

respawn

exec /sbin/getty 115200 ttymxc0

Remove microSD card:

sync

sudo umount /media/boot

sudo umount /media/rootfs

i.MX53 Bootloaders

Basic Requirements

Bootloader

U-Boot Download:

U-Boot Patches:

U-Boot Configure and Build:

Linux Kernel

Linux Build Script:

Debian Squeeze 6.0.6 (armel based) Root File System

Debian Wheezy (snapshot) (armhf based) Root File System

Ubuntu 12.10 (Quantal) (armhf based) Root File System

Setup microSD card

v3.4.x "uEnv.txt" boot script

Device Tree "uEnv.txt" boot script v3.6.x

Enable Networking on Bootup:

Enable Serial Login:

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