1 U-Boot for LibreTech AC
2 =======================
4 LibreTech AC is a single board computer manufactured by Libre Technology
5 with the following specifications:
7 - Amlogic S805X ARM Cortex-A53 quad-core SoC @ 1.2GHz
11 - HDMI 2.0 4K/60Hz display
17 Schematics are available on the manufacturer website.
19 Currently the U-Boot port supports the following devices:
28 > export CROSS_COMPILE=aarch64-none-elf-
29 > make libretech-ac_defconfig
35 Amlogic doesn't provide sources for the firmware and for tools needed
36 to create the bootloader image, so it is necessary to obtain them from
37 the git tree published by the board vendor:
39 > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
40 > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
41 > tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
42 > tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
43 > export PATH=$PWD/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux/bin:$PWD/gcc-linaro-arm-none-eabi-4.8-2013.11_linux/bin:$PATH
44 > git clone https://github.com/BayLibre/u-boot.git -b libretech-ac amlogic-u-boot
46 > wget https://raw.githubusercontent.com/BayLibre/u-boot/libretech-cc/fip/blx_fix.sh
47 > make libretech_ac_defconfig
49 > export UBOOTDIR=$PWD
51 Download the latest Amlogic Buildroot package, and extract it :
52 > wget http://openlinux2.amlogic.com:8000/ARM/filesystem/Linux_BSP/buildroot_openlinux_kernel_4.9_fbdev_20180418.tar.gz
53 > tar xfz buildroot_openlinux_kernel_4.9_fbdev_20180418.tar.gz buildroot_openlinux_kernel_4.9_fbdev_20180418/bootloader
54 > export BRDIR=$PWD/buildroot_openlinux_kernel_4.9_fbdev_20180418
56 Go back to mainline U-Boot source tree then :
59 > cp $UBOOTDIR/build/scp_task/bl301.bin fip/
60 > cp $UBOOTDIR/build/board/amlogic/libretech_ac/firmware/bl21.bin fip/
61 > cp $UBOOTDIR/build/board/amlogic/libretech_ac/firmware/acs.bin fip/
62 > cp $BRDIR/bootloader/uboot-repo/bl2/bin/gxl/bl2.bin fip/
63 > cp $BRDIR/bootloader/uboot-repo/bl30/bin/gxl/bl30.bin fip/
64 > cp $BRDIR/bootloader/uboot-repo/bl31/bin/gxl/bl31.img fip/
65 > cp u-boot.bin fip/bl33.bin
67 > sh $UBOOTDIR/blx_fix.sh \
76 > $BRDIR/bootloader/uboot-repo/fip/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
78 > sh $UBOOTDIR/blx_fix.sh \
87 > $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
88 > $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
89 > $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
90 > $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
91 > $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bootmk \
92 --output fip/u-boot.bin \
93 --bl2 fip/bl2.n.bin.sig \
94 --bl30 fip/bl30_new.bin.enc \
95 --bl31 fip/bl31.img.enc \
96 --bl33 fip/bl33.bin.enc
98 and then write the image to SD with:
100 > DEV=/dev/your_sd_device
101 > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
102 > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444