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.
For simplified usage, pleaser refer to Pre-Generated FIP file set with codename beelink-s922x
$ 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