U-boot

U-boot

U-boot must be cross-compiled on an x86 Linux PC.

Toolchain

Click one of the site to download toolchain to build U-boot.

Once the download is done, extract the tarball to /opt/toolchains/.

$ sudo mkdir -p /opt/toolchains
$ sudo tar xvf gcc-linaro-aarch64-none-elf-4.9-2014.09_linux.tar.xz -C /opt/toolchains/

In order to add the toolchain path to PATH, paste below lines to $HOME/.bashrc.

export ARCH=arm
export CROSS_COMPILE=aarch64-none-elf-
export PATH=/opt/toolchains/gcc-linaro-aarch64-none-elf-4.9-2014.09_linux/bin/:$PATH

You can apply the change if you login again or import to apply this change, login again or evaluate $HOME/.bashrc with source command.

$ source ~/.bashrc

You can check if the toolchain installed above works properly while checking the version of toolchain. If you can find gcc version 4.9.2 20140904 (prerelease) at the end of the line, the toolchain is well installed.

$ aarch64-none-elf-gcc -v
Using built-in specs.
COLLECT_GCC=aarch64-none-elf-gcc
COLLECT_LTO_WRAPPER=/opt/toolchains/gcc-linaro-aarch64-none-elf-4.9-2014.09_linux/bin/../libexec/gcc/aarch64-none-elf/4.9.2/lto-wrapper
Target: aarch64-none-elf
Configured with: /cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/src/gcc-linaro-4.9-2014.09/configure --build=i686-build_pc-linux-gnu --host=i686-build_pc-linux-gnu --target=aarch64-none-elf --prefix=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/install --with-local-prefix=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/install/aarch64-none-elf --without-headers --with-newlib --enable-threads=no --disable-shared --with-pkgversion='crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09' --with-bugurl=https://bugs.launchpad.net/gcc-linaro --with-arch=armv8-a --disable-__cxa_atexit --with-gmp=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --with-mpfr=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --with-mpc=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --with-isl=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --with-cloog=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --with-libelf=/cbuild/slaves/oorts/crosstool-ng/builds/aarch64-none-elf-linux/.build/aarch64-none-elf/build/static --enable-lto --enable-linker-build-id --disable-libmudflap --disable-libgomp --disable-libssp --disable-libstdcxx-pch --enable-multiarch --disable-multilib --enable-languages=c,c++,fortran
Thread model: single
gcc version 4.9.2 20140904 (prerelease) (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09)

Checkout & compile

You can checkout U-boot source tree from Hardkernel's Github.

$ git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01

Before you compile U-boot, you must configure for ODROID-C2 with following command.

$ cd u-boot
$ make odroidc2_config

And finally you can compile U-boot.

$ make

Installation

The bootloader for ODROID-C2 is consisted with two part, 1st stage bootloader + U-boot. You can find u-boot.bin once you compile U-boot, as well as bl1.bin.hardkernel in the directory sd_fuse/. Both binaries must be installed in a card (eMMC or MicroSD).

The 1st stage bootloader, bl1.bin.hardkernel, is provided as prebuilt binary only.
The u-boot binary needs to be signed. This is done by an x86-64 executable, aml_encrypt_gxb, which is shipped with the u-boot source; source for aml_encrypt_gxb is not available..

Installation to blank card

We provide the script, sd_fuse/sd_fusing.sh, this helps you to install the bootloader into your blank card eMMC or MicroSD.

Insert your card to USB card reader and attach to USB host port of your desktop.
Check the device path of your USB card reader.
Install the bootloader binaries using sd_fuse/sd_fusing.sh.

$ cd sd_fuse
$ ./sd_fusing.sh <device/path/of/your/card>

You can download and install the latest version of binaries as following.

Click the following site to download the boot loader of final release version

$ tar zxvf c2_boot_xxx_release.tar.gz
$ cd c2_boot_xxx_release
$ ./sd_fusing.sh <device/path/of/your/card>

Installation using fastboot

If you can boot your ODROID-C2 already and want to install a new u-boot.bin built by you. Fastboot helps you to install a u-boot.bin into your board.

$ sudo fastboot flash bootloader sd_fuse/u-boot.bin

If installation is done, you care reboot your ODROID-C2 with fastboot.

$ sudo fastboot reboot

Installation from Linux on C2

You can also install U-boot from Linux with dd command. After building U-boot, copy u-boot.bin into your ODROID-C2. Then do the command below in order to flash your U-boot image to MicroSD or eMMC.

$ sudo dd if=u-boot.bin of=/dev/mmcblk0 bs=512 seek=97
$ sudo sync

You must use the u-boot.bin binary under the folder, “u-boot/sd_fuse/u-boot.bin”

Update from Linux on ODROID-C2 board using u-boot package

On ODROID-C2 ubuntu, you can update U-boot with the latest released one using apt-get install command.

$ sudo apt-get install u-boot

TFTP

HOST-PC

NOTE: This step is Ubuntu 14.04 example.

Install the package:

$ sudo apt-get install tftpd-hpa

Edit config file as follows:

$ sudo vi /etc/default/tftpd-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftpboot"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="-s -c -l"

Create TFTP folder:

sudo mkdir /tftpboot
sudo chmod -R 777 /tftpboot
sudo chown -R nobody /tftpboot

Restart the app to apply new configuration:

sudo service tftpd-hpa restart

Copy Image, meson64_odroidc2.dtb and uInitrd files to /tftpboot directory.

U-Boot

Assumptions:

TFTP server IP address: 192.168.0.2
ODROID-C2 IP address: 192.168.0.3

Set the tftp server & board ip address:

odroidc2# setenv serverip 192.168.0.2
odroidc2# setenv ipaddr 192.168.0.3

Download images using tftp:

odroidc2# tftp 0x1000000 meson64_odroidc2.dtb
odroidc2# tftp 0x11000000 Image
odroidc2# tftp 0x13000000 uInitrd

Booting:

odroidc2# setenv condev "console=ttyS0,115200n8 console=tty0"
odroidc2# setenv m "1080p60hz"
odroidc2# setenv m_bpp "32"
odroidc2# setenv bootargs "root=UUID=e139ce78-9841-40fe-8823-96a304a09859 rootwait rw ${condev} no_console_suspend hdmimode=${m} m_bpp=${m_bpp} fsck.fix=yes"
odroidc2# booti 0x11000000 0x13000000 0x1000000

How to build u-boot with bl301 firmware

Because of the issue of build failure on any platform other than x86-64 and support of buildroot, we've separated bl301 firmware source code from u-boot repository.

In the path, u-boot/fip/gxb/, there is a pre-built bl301.bin binary of the latest version, so you can build just u-boot without a re-build bl301 process.

If you want to modify and update bl301-related source codes by yourself, please refer to the following.

Checkout and Merge

You can checkout bl301 firmware source tree from Hardkernel's Github.

$ git clone https://github.com/hardkernel/u-boot_firmware.git -b odroidc2-bl301

You should merge bl301 with u-boot before build it.

$ git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01
$ git clone https://github.com/hardkernel/u-boot_firmware.git -b odroidc2-bl301

$ cd u-boot

$ git remote add u-boot_firmware ../u-boot_firmware/
$ git fetch u-boot_firmware 
$ git merge --no-commit u-boot_firmware/odroidc2-bl301

Toolchain for bl301

bl301.bin source code needs a toolchain, arm-none-eabi-. Click one of the site to download toolchain to build U-boot.

Download