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.. SPDX-License-Identifier: GPL-2.0+
U-Boot for ODROID-C2 (S905)
===========================
ODROID-C2 is a single board computer manufactured by Hardkernel with the following
specifications:
- Amlogic S905 ARM Cortex-A53 quad-core SoC @ 1.5GHz
- ARM Mali 450 GPU
- 2GB DDR3 SDRAM
- Gigabit Ethernet
- HDMI 2.0 4K/60Hz display
- 40-pin GPIO header
- 4 x USB 2.0 Host, 1 x USB OTG
- eMMC, microSD
- Infrared receiver
Schematics are available on the manufacturer website: https://wiki.odroid.com
U-Boot Compilation
------------------
.. code-block:: bash
$ export CROSS_COMPILE=aarch64-none-elf-
$ make odroid-c2_defconfig
$ make
U-Boot Signing with Pre-Built FIP repo
--------------------------------------
.. code-block:: bash
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh odroid-c2 /path/to/u-boot/u-boot.bin my-output-dir
U-Boot Manual Signing
---------------------
Amlogic does not provide sources for the firmware and tools needed to create a bootloader
image so it is necessary to obtain binaries from sources published by the board vendor:
.. code-block:: bash
$ DIR=odroid-c2
$ git clone --depth 1 https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01 $DIR
$ $DIR/fip/fip_create --bl30 $DIR/fip/gxb/bl30.bin \
--bl301 $DIR/fip/gxb/bl301.bin \
--bl31 $DIR/fip/gxb/bl31.bin \
--bl33 u-boot.bin \
$DIR/fip.bin
$ $DIR/fip/fip_create --dump $DIR/fip.bin
$ cat $DIR/fip/gxb/bl2.package $DIR/fip.bin > $DIR/boot_new.bin
$ $DIR/fip/gxb/aml_encrypt_gxb --bootsig \
--input $DIR/boot_new.bin \
--output $DIR/u-boot.img
$ dd if=$DIR/u-boot.img of=$DIR/u-boot.gxbb bs=512 skip=96
Then write U-Boot to SD or eMMC with:
.. code-block:: bash
$ DEV=/dev/your_boot_device
$ BL1=$DIR/sd_fuse/bl1.bin.hardkernel
$ dd if=$BL1 of=$DEV conv=fsync bs=1 count=442
$ dd if=$BL1 of=$DEV conv=fsync bs=512 skip=1 seek=1
$ dd if=$DIR/u-boot.gxbb of=$DEV conv=fsync bs=512 seek=97
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