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INSTALLING UBUNTU RARING TO OUYA
================================

This is tested on Debian Wheezy and adapted from https://github.com/kulve/tegra-debian

Note that these Ubuntu instructions use the *first* partition of the USB stick, unlike my Debian instructions.

*OUYA IS EASILY BRICKABLE. READ NO FURTHER*

That said, the goal is not to flash anything on Ouya. The kernel is booted from memory and Ubuntu from an USB stick or SD card.

The binaries mentioned in this readme can be found from http://tuomas.kulve.fi/tmp/ouya-ubuntu/ .

Distribution issues
-------------------
* Debian Wheezy: Segfault in OMX_UseEGLImage with XBMC.
* Debian Jessie: X.Org Video ABI 15, no driver.
* Ubuntu 12.04: Old.
* Ubuntu 12.10: Old.
* Ubuntu 13.04: Works.
* Ubuntu 13.10: X.Org Video ABI 14, rendering problems.
* Ubuntu 14.04: X.Org Video ABI 15, no driver.

Known issues
------------
* Not properly tested, so there is a bunch unknown issues.
* Low-power core doesn't work (kernel crash)
    * CPUfreq with ondemand governer works though.
* Gstreamer usually assumes xvimagesink as the video sink, but nvxvimagesink must be used.
    * Totem has moved to GStreamer 1.0 so no Tegra support anymore.
* Wifi firmware binaries not included, they need to be copied from the Android rootfs.

Setting up the rootfs
---------------------

### Prepare a USB stick ###

Partition an USB stick (I used SD card in a small USB reader) for EXT4. I recommend using at least 8GB stick.

Use `mkfs.ext4` to initialise the partition. If your system is properly set you shouldn't need sudo for that while you would need sudo to format your actual root partition.

### Mount the USB stick: ###

It is possible to create chroot to a directory and copy the contents later, or inside a loopback device and use dd. These instructions creates the chroot directly to the USB stick.

Change the sdX1 below to match your setup.

export TARGET=/mnt/rootfs
    sudo mkdir -p $TARGET
    sudo mount /dev/sdX1 $TARGET

### Extract base system packages to the USB stick: ###
    sudo debootstrap --verbose --arch armhf --foreign raring $TARGET http://ports.ubuntu.com/

### Prepare for chroot: ###
    sudo apt-get install qemu-user-static binfmt-support
    sudo cp /usr/bin/qemu-arm-static $TARGET/usr/bin
    sudo mkdir $TARGET/dev/pts
    sudo modprobe binfmt_misc
    sudo mount -t devpts devpts $TARGET/dev/pts
    sudo mount -t proc proc $TARGET/proc

### Finish the base system installation: ###
    sudo chroot $TARGET

You should see `I have no name!@hostname:/#`

/debootstrap/debootstrap --second-stage

At the end, you should see `I: Base system installed successfully.`

Configuring rootfs while still in chroot
----------------------------------------

### Setup sources.list: ###
    cat <<END > /etc/apt/sources.list
    deb http://ports.ubuntu.com/ raring main multiverse universe restricted
    deb-src http://ports.ubuntu.com/ raring main multiverse universe restricted
    END

apt-get update

### Configure language: ###
    export LANG=C
    apt-get install apt-utils dialog language-pack-en
    export LANG=en_GB.UTF-8

### Install some important stuff: ###
    apt-get install openssh-server wget curl ntp vim nano mc zip wireless-tools bluez rfkill

Hack around failing DBUS invoke:

ln -s /bin/true /usr/local/sbin/invoke-rc.d
    apt-get install dbus
    rm /usr/local/sbin/invoke-rc.d

### Configure ethernet with dhcp and set hostname: ###
    cat <<END > /etc/network/interfaces
    auto lo eth0
    iface lo inet loopback
    iface eth0 inet dhcp
    END

echo ouya > /etc/hostname

### Create filesystem mounts: ###

cat <<END > /etc/fstab
    # /etc/fstab: static file system information.
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    /dev/root      /               ext4    noatime,errors=remount-ro 0 1
    tmpfs          /tmp            tmpfs   defaults          0       0
    /.swap      none            swap    sw                0       0
    END

Optionally create 512M swap file:

dd if=/dev/zero of=/.swap bs=1M count=512
    mkswap /.swap

### Activate remote console: ###
    echo 'T0:2345:respawn:/sbin/getty -L ttyS0 115200 linux' >> /etc/inittab

### Set root passwd: ###
    passwd

### Add normal user with sudo rights: ###
    adduser ouya
    adduser ouya video
    adduser ouya audio
    adduser ouya plugdev
    adduser ouya sudo

### Install Slim login manager, XFCE: ###
    apt-get install xfce4 xfce4-goodies midori slim gstreamer0.10-plugins-good gstreamer0.10-alsa gnome-icon-theme-full

### Install Tegra 3 proprietary binaries and Ouya config files: ###
    dpkg -i tegra30-r16_*_armhf.deb

### Disable core hotplugging

vi /etc/init.d/ondemand

Change the options to match the following:

echo 1 >/sys/module/cpu_tegra3/parameters/no_lp
    echo 0 >/sys/module/cpu_tegra3/parameters/auto_hotplug
    echo 0 >/sys/module/cpuidle/parameters/lp2_in_idle

### Remove pulseaudio

apt-get purge gstreamer0.10-pulseaudio pulseaudio

### Finish up with the chroot: ###

Log out from the chroot and extract kernel modules to the target:

sudo mkdir -p $TARGET/lib/modules/
    sudo tar zxf modules-3.1.10-tk*.tar.gz -C $TARGET/lib/modules/

Kill any process started in the chroot (`lsof $TARGET`) and finally unmount the target:

sudo umount $TARGET

### Install adb and fastboot to the host Debian: ###
    sudo dpkg -i android-tools*deb

Booting Ouya
------------

### Reboot Ouya to fastboot: ###
    adb reboot-bootloader

### Boot Ouya with the kernel: ###
*WARNING: NEVER EVER FLASH THE KERNEL, JUST BOOT FROM RAM*

fastboot boot zImage-3.1.10-tk*

Wifi
----

The BCM firmware binaries may not be redistributable so they need to be copied from the Android rootfs after booting to Debian:

sudo mount -o ro /dev/mmcblk0p3 /mnt/
    sudo mkdir /lib/firmware/bcm4330/
    sudo cp /mnt/etc/nvram_4330.txt /lib/firmware/
    sudo cp /mnt/vendor/firmware/bcm4330/fw_bcmdhd.bin /lib/firmware/bcm4330/
    sudo cp /mnt/etc/firmware/bcm4330.hcd /lib/firmware/bcm4330/
    sudo umount /mnt

sudo modprobe bcmdhd

Bluetooth
---------

The following command should set up BT but I have not got it working yet:
    sudo brcm_patchram_plus --enable_hci --use_baudrate_for_download --scopcm=0,2,0,0,0,0,0,0,0,0  --baudrate 3000000 --patchram /lib/firmware/bcm4330/bcm4330.hcd --no2bytes --enable_lpm --tosleep=50000 /dev/ttyHS2 &

tegra-ubuntu

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