1.. SPDX-License-Identifier: GPL-2.0+
2
3U-Boot for Beelink GS-King-X (S922X)
4====================================
5
6The Shenzen AZW (Beelink) GS-King-X is based on the Amlogic W400 reference board with an
7S922X-H chip and the following specifications:
8
9- 4GB LPDDR4 RAM
10- 64GB eMMC storage
11- 10/100/1000 Base-T Ethernet
12- AP6356S Wireless (802.11 a/b/g/n/ac, BT 4.1)
13- HDMI 2.1 video
14- S/PDIF optical output
15- 2x ESS9018 audio DACs
16- 4x Ricor RT6862 audio amps
17- Analogue headphone output
18- 1x USB 2.0 OTG port
19- 3x USB 3.0 ports
20- IR receiver
21- 1x micro SD card slot (internal)
22- USB SATA controller with 2x 3.5" drive bays
23- 1x Power on/off button
24
25Beelink do not provide public schematics, but have been willing to share them with known
26distro developers to assist with development.
27
28U-Boot Compilation
29------------------
30
31.. code-block:: bash
32
33    $ export CROSS_COMPILE=aarch64-none-elf-
34    $ make beelink-gsking-x_defconfig
35    $ make
36
37U-Boot Signing with Pre-Built FIP repo
38--------------------------------------
39
40.. code-block:: bash
41
42    $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
43    $ cd amlogic-boot-fip
44    $ mkdir my-output-dir
45    $ ./build-fip.sh beelink-s922x /path/to/u-boot/u-boot.bin my-output-dir
46
47U-Boot Manual Signing
48---------------------
49
50Beelink released an Amlogic "SDK" dump in their forums but the U-Boot sources included
51result in 2GB RAM detected. The following FIPs were generated with newer sources and
52detect 4GB RAM: https://github.com/LibreELEC/amlogic-boot-fip/tree/master/beelink-s922x
53
54.. code-block:: bash
55
56    $ wget https://github.com/LibreELEC/amlogic-boot-fip/archive/master.zip
57    $ unzip master.zip
58    $ export FIPDIR=$PWD/amlogic-boot-fip/beelink-s922x
59
60Go back to the mainline U-Boot source tree then:
61
62.. code-block:: bash
63
64    $ mkdir fip
65    $ cp $FIPDIR/* fip/
66    $ cp u-boot.bin fip/bl33.bin
67
68    $ sh fip/blx_fix.sh \
69         fip/bl30.bin \
70         fip/zero_tmp \
71         fip/bl30_zero.bin \
72         fip/bl301.bin \
73         fip/bl301_zero.bin \
74         fip/bl30_new.bin \
75         bl30
76
77    $ sh fip/blx_fix.sh \
78         fip/bl2.bin \
79         fip/zero_tmp \
80         fip/bl2_zero.bin \
81         fip/acs.bin \
82         fip/bl21_zero.bin \
83         fip/bl2_new.bin \
84         bl2
85
86    $ fip/aml_encrypt_g12b --bl30sig --input fip/bl30_new.bin \
87                           --output fip/bl30_new.bin.g12a.enc \
88                           --level v3
89    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl30_new.bin.g12a.enc \
90                           --output fip/bl30_new.bin.enc \
91                           --level v3 --type bl30
92    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl31.img \
93                           --output fip/bl31.img.enc \
94                           --level v3 --type bl31
95    $ fip/aml_encrypt_g12b --bl3sig --input fip/bl33.bin --compress lz4 \
96                           --output fip/bl33.bin.enc \
97                           --level v3 --type bl33
98    $ fip/aml_encrypt_g12b --bl2sig --input fip/bl2_new.bin \
99                           --output fip/bl2.n.bin.sig
100    $ fip/aml_encrypt_g12b --bootmk \
101                           --output fip/u-boot.bin \
102                           --bl2 fip/bl2.n.bin.sig \
103                           --bl30 fip/bl30_new.bin.enc \
104                           --bl31 fip/bl31.img.enc \
105                           --bl33 fip/bl33.bin.enc \
106                           --ddrfw1 fip/ddr4_1d.fw \
107                           --ddrfw2 fip/ddr4_2d.fw \
108                           --ddrfw3 fip/ddr3_1d.fw \
109                           --ddrfw4 fip/piei.fw \
110                           --ddrfw5 fip/lpddr4_1d.fw \
111                           --ddrfw6 fip/lpddr4_2d.fw \
112                           --ddrfw7 fip/diag_lpddr4.fw \
113                           --ddrfw8 fip/aml_ddr.fw \
114                           --level v3
115
116Then write U-Boot to SD or eMMC with:
117
118.. code-block:: bash
119
120    $ DEV=/dev/boot_device
121    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
122    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440
123