1.. SPDX-License-Identifier: GPL-2.0+
2
3U-Boot for ODROID-C2 (S905)
4===========================
5
6ODROID-C2 is a single board computer manufactured by Hardkernel with the following
7specifications:
8
9 - Amlogic S905 ARM Cortex-A53 quad-core SoC @ 1.5GHz
10 - ARM Mali 450 GPU
11 - 2GB DDR3 SDRAM
12 - Gigabit Ethernet
13 - HDMI 2.0 4K/60Hz display
14 - 40-pin GPIO header
15 - 4 x USB 2.0 Host, 1 x USB OTG
16 - eMMC, microSD
17 - Infrared receiver
18
19Schematics are available on the manufacturer website: https://wiki.odroid.com
20
21U-Boot Compilation
22------------------
23
24.. code-block:: bash
25
26    $ export CROSS_COMPILE=aarch64-none-elf-
27    $ make odroid-c2_defconfig
28    $ make
29
30U-Boot Signing with Pre-Built FIP repo
31--------------------------------------
32
33.. code-block:: bash
34
35    $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
36    $ cd amlogic-boot-fip
37    $ mkdir my-output-dir
38    $ ./build-fip.sh odroid-c2 /path/to/u-boot/u-boot.bin my-output-dir
39
40U-Boot Manual Signing
41---------------------
42
43Amlogic does not provide sources for the firmware and tools needed to create a bootloader
44image so it is necessary to obtain binaries from sources published by the board vendor:
45
46.. code-block:: bash
47
48    $ DIR=odroid-c2
49    $ git clone --depth 1 https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01 $DIR
50
51    $ $DIR/fip/fip_create --bl30  $DIR/fip/gxb/bl30.bin \
52                          --bl301 $DIR/fip/gxb/bl301.bin \
53                          --bl31  $DIR/fip/gxb/bl31.bin \
54                          --bl33  u-boot.bin \
55                          $DIR/fip.bin
56
57    $ $DIR/fip/fip_create --dump $DIR/fip.bin
58    $ cat $DIR/fip/gxb/bl2.package $DIR/fip.bin > $DIR/boot_new.bin
59    $ $DIR/fip/gxb/aml_encrypt_gxb --bootsig \
60                                   --input $DIR/boot_new.bin \
61                                   --output $DIR/u-boot.img
62    $ dd if=$DIR/u-boot.img of=$DIR/u-boot.gxbb bs=512 skip=96
63
64Then write U-Boot to SD or eMMC with:
65
66.. code-block:: bash
67
68    $ DEV=/dev/your_boot_device
69    $ BL1=$DIR/sd_fuse/bl1.bin.hardkernel
70    $ dd if=$BL1 of=$DEV conv=fsync bs=1 count=442
71    $ dd if=$BL1 of=$DEV conv=fsync bs=512 skip=1 seek=1
72    $ dd if=$DIR/u-boot.gxbb of=$DEV conv=fsync bs=512 seek=97
73