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

$ 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.

$ 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:

$ 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:

$ 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