.. SPDX-License-Identifier: GPL-2.0+

U-Boot for Beelink GT-King
==========================

The Shenzen AZW (Beelink) GT-King is based on the Amlogic W400 reference
board with an S922X-H chip.

- 4GB LPDDR4 RAM
- 64GB eMMC storage
- 10/100/1000 Base-T Ethernet
- AP6356S Wireless (802.11 a/b/g/n/ac, BT 4.1)
- HDMI 2.1 video
- S/PDIF optical output
- Analogue audio output
- 1x USB 2.0 port
- 2x USB 3.0 ports
- IR receiver
- 1x micro SD card slot

Beelink do not provide public schematics, but have been willing
to share them with known distro developers on request.

U-Boot compilation
------------------

.. code-block:: bash

    $ export CROSS_COMPILE=aarch64-none-elf-
    $ make beelink-gtking_defconfig
    $ make

Image creation
--------------

Amlogic does not provide sources for the firmware and for tools needed
to create the bootloader image. Beelink have provided the Amlogic "SDK"
in their forums, but the u-boot sources included result in 2GB RAM being
detected. The following FIPs were generated with newer private sources
and give correct (4GB) RAM detection:

https://github.com/LibreELEC/amlogic-boot-fip/tree/master/beelink-s922x

NB: Beelink use a common board config for GT-King, GT-King Pro and the
GS-King-X model, hence the "beelink-s922x" name.

.. code-block:: bash

    $ wget https://github.com/LibreELEC/amlogic-boot-fip/archive/master.zip
    $ unzip master.zip
    $ export FIPDIR=$PWD/amlogic-boot-fip/beelink-s922x

Go back to the mainline U-Boot source tree then:

.. code-block:: bash

    $ mkdir fip
    $ cp $FIPDIR/* fip/
    $ cp u-boot.bin fip/bl33.bin

    $ sh fip/blx_fix.sh \
    	fip/bl30.bin \
    	fip/zero_tmp \
    	fip/bl30_zero.bin \
    	fip/bl301.bin \
    	fip/bl301_zero.bin \
    	fip/bl30_new.bin \
    	bl30

    $ sh fip/blx_fix.sh \
    	fip/bl2.bin \
    	fip/zero_tmp \
    	fip/bl2_zero.bin \
    	fip/acs.bin \
    	fip/bl21_zero.bin \
    	fip/bl2_new.bin \
    	bl2

    $ fip/aml_encrypt_g12b --bl30sig --input fip/bl30_new.bin \
    				--output fip/bl30_new.bin.g12a.enc \
    				--level v3
    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl30_new.bin.g12a.enc \
    				--output fip/bl30_new.bin.enc \
    				--level v3 --type bl30
    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl31.img \
    				--output fip/bl31.img.enc \
    				--level v3 --type bl31
    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl33.bin --compress lz4 \
    				--output fip/bl33.bin.enc \
    				--level v3 --type bl33
    $ fip/aml_encrypt_g12b --bl2sig --input fip/bl2_new.bin \
    				--output fip/bl2.n.bin.sig
    $ fip/aml_encrypt_g12b --bootmk \
    		--output fip/u-boot.bin \
    		--bl2 fip/bl2.n.bin.sig \
    		--bl30 fip/bl30_new.bin.enc \
    		--bl31 fip/bl31.img.enc \
    		--bl33 fip/bl33.bin.enc \
    		--ddrfw1 fip/ddr4_1d.fw \
    		--ddrfw2 fip/ddr4_2d.fw \
    		--ddrfw3 fip/ddr3_1d.fw \
    		--ddrfw4 fip/piei.fw \
    		--ddrfw5 fip/lpddr4_1d.fw \
    		--ddrfw6 fip/lpddr4_2d.fw \
    		--ddrfw7 fip/diag_lpddr4.fw \
    		--ddrfw8 fip/aml_ddr.fw \
    		--level v3

and then write the image to SD with:

.. code-block:: bash

    $ DEV=/dev/your_sd_device
    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444