U-Boot for Amlogic SEI610 (S905X3)

SEI610 is a customer board manufactured by SEI Robotics with the following specification:

  • Amlogic S905X3 ARM Cortex-A55 quad-core SoC

  • 2GB DDR4 SDRAM

  • 10/100 Ethernet (Internal PHY)

  • 1x USB 3.0 Host

  • 1x USB Type-C DRD

  • 1x FTDI USB Serial Debug Interface

  • eMMC

  • SDcard

  • Infrared receiver

  • SDIO WiFi Module

U-Boot Compilation

$ export CROSS_COMPILE=aarch64-none-elf-
$ make sei610_defconfig
$ make

U-Boot Signing with Pre-Built FIP repo

$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh sei610 /path/to/u-boot/u-boot.bin my-output-dir

U-Boot Manual Signing

Amlogic does not provide sources for the firmware and tools needed to create a bootloader image so it is necessary to obtain binaries from sources published by the board vendor:

$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$ tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$ tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$ 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
$ git clone https://github.com/BayLibre/u-boot.git -b buildroot-openlinux-4.9-g12a-201904 amlogic-u-boot
$ cd amlogic-u-boot
$ make sm1_ac200_v1_defconfig
$ make
$ export UBOOTDIR=$PWD

Download the latest Amlogic buildroot package and extract it:

$ wget http://openlinux2.amlogic.com:8000/ARM/filesystem/buildroot-openlinux-A113-201901.tgz
$ tar xfz buildroot-openlinux-A113-201901.tgz buildroot-openlinux-A113-201901/bootloader
$ export BRDIR=$PWD/buildroot-openlinux-A113-201901
$ export FIPDIR=$BRDIR/bootloader/uboot-repo/fip

Go back to the mainline U-Boot source tree then:

$ mkdir fip

$ wget https://github.com/BayLibre/u-boot/releases/download/v2017.11-libretech-cc/blx_fix_g12a.sh -O fip/blx_fix.sh
$ cp $UBOOTDIR/build/scp_task/bl301.bin fip/
$ cp $UBOOTDIR/build/board/amlogic/g12a_u200_v1/firmware/acs.bin fip/
$ cp $BRDIR/bootloader/uboot-repo/bl2/bin/g12a/bl2.bin fip/
$ cp $BRDIR/bootloader/uboot-repo/bl30/bin/g12a/bl30.bin fip/
$ cp $BRDIR/bootloader/uboot-repo/bl31_1.3/bin/g12a/bl31.img fip/
$ cp $FIPDIR/g12a/ddr3_1d.fw fip/
$ cp $FIPDIR/g12a/ddr4_1d.fw fip/
$ cp $FIPDIR/g12a/ddr4_2d.fw fip/
$ cp $FIPDIR/g12a/diag_lpddr4.fw fip/
$ cp $FIPDIR/g12a/lpddr4_1d.fw fip/
$ cp $FIPDIR/g12a/lpddr4_2d.fw fip/
$ cp $FIPDIR/g12a/piei.fw 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

$ $FIPDIR/g12a/aml_encrypt_g12a --bl30sig --input fip/bl30_new.bin \
                                          --output fip/bl30_new.bin.g12a.enc \
                                          --level v3
$ $FIPDIR/g12a/aml_encrypt_g12a --bl3sig --input fip/bl30_new.bin.g12a.enc \
                                         --output fip/bl30_new.bin.enc \
                                         --level v3 --type bl30
$ $FIPDIR/g12a/aml_encrypt_g12a --bl3sig --input fip/bl31.img \
                                         --output fip/bl31.img.enc \
                                         --level v3 --type bl31
$ $FIPDIR/g12a/aml_encrypt_g12a --bl3sig --input fip/bl33.bin --compress lz4 \
                                         --output fip/bl33.bin.enc \
                                         --level v3 --type bl33
$ $FIPDIR/g12a/aml_encrypt_g12a --bl2sig --input fip/bl2_new.bin \
                                         --output fip/bl2.n.bin.sig
$ $FIPDIR/g12a/aml_encrypt_g12a --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 \
                                --level v3

Then write U-Boot to SD or eMMC with:

$ DEV=/dev/boot_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=440