1.. SPDX-License-Identifier: GPL-2.0+
2
3U-Boot for JetHub J80
4======================
5
6JetHome Jethub H1 (http://jethome.ru/jethub-h1) is a home automation
7controller manufactured by JetHome with the following specifications:
8
9 - Amlogic S905W (ARM Cortex-A53) quad-core up to 1.5GHz
10 - No video out
11 - 1GB DDR3
12 - 8/16GB eMMC flash
13 - 2 x USB 2.0
14 - 1 x 10/100Mbps ethernet
15 - SDIO WiFi / Bluetooth RTL8822CS IEEE 802.11a/b/g/n/ac, Bluetooth 5.0.
16 - TI CC2538 + CC2592 Zigbee Wireless Module with up to 20dBm output
17   power and Zigbee 3.0 support.
18 - MicroSD 2.x/3.x/4.x DS/HS cards.
19 - 1 x gpio LED
20 - ADC user Button
21 - DC source 5V microUSB
22 - Square plastic case
23
24U-Boot compilation
25------------------
26
27.. code-block:: bash
28
29    $ export CROSS_COMPILE=aarch64-none-elf-
30    $ make jethub_j80_defconfig
31    $ make
32
33Image creation
34--------------
35
36Amlogic doesn't provide sources for the firmware and for tools needed
37to create the bootloader image, so it is necessary to obtain binaries
38from the git tree published by the board vendor:
39
40.. code-block:: bash
41
42    $ git clone https://github.com/jethome-ru/jethub-aml-tools jethub-u-boot
43    $ cd jethub-u-boot
44    $ export FIPDIR=$PWD
45
46Go back to mainline U-Boot source tree then :
47
48.. code-block:: bash
49
50    $ mkdir fip
51
52    $ cp $FIPDIR/j80/bl2.bin fip/
53    $ cp $FIPDIR/j80/acs.bin fip/
54    $ cp $FIPDIR/j80/bl21.bin fip/
55    $ cp $FIPDIR/j80/bl30.bin fip/
56    $ cp $FIPDIR/j80/bl301.bin fip/
57    $ cp $FIPDIR/j80/bl31.img fip/
58    $ cp u-boot.bin fip/bl33.bin
59
60    $ $FIPDIR/blx_fix.sh \
61        fip/bl30.bin \
62        fip/zero_tmp \
63        fip/bl30_zero.bin \
64        fip/bl301.bin \
65        fip/bl301_zero.bin \
66        fip/bl30_new.bin \
67        bl30
68
69    $ python $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
70
71    $ $FIPDIR/blx_fix.sh \
72        fip/bl2_acs.bin \
73        fip/zero_tmp \
74        fip/bl2_zero.bin \
75        fip/bl21.bin \
76        fip/bl21_zero.bin \
77        fip/bl2_new.bin \
78        bl2
79
80    $ $FIPDIR/j80/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
81    $ $FIPDIR/j80/aml_encrypt_gxl --bl3enc --input fip/bl31.img
82    $ $FIPDIR/j80/aml_encrypt_gxl --bl3enc --input fip/bl33.bin --compress lz4
83    $ $FIPDIR/j80/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
84    $ $FIPDIR/j80/aml_encrypt_gxl --bootmk \
85                --output fip/u-boot.bin \
86                --bl2 fip/bl2.n.bin.sig \
87                --bl30 fip/bl30_new.bin.enc \
88                --bl31 fip/bl31.img.enc \
89                --bl33 fip/bl33.bin.enc
90
91and then write the image to SD/eMMC with:
92
93.. code-block:: bash
94
95    $ DEV=/dev/your_sd_device
96    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
97    $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444
98