| .. SPDX-License-Identifier: GPL-2.0+ |
| |
| U-Boot for LibreTech-AC 'LaFrite' (S805X) |
| ========================================= |
| |
| LibreTech-AC aka 'LaFrite' is a Single Board Computer manufactured by Libre Computer |
| with the following specifications: |
| |
| - Amlogic S805X ARM Cortex-A53 quad-core SoC @ 1.2GHz |
| - ARM Mali 450 GPU |
| - 512MiB DDR4 SDRAM |
| - 10/100 Ethernet |
| - HDMI 2.0 4K/60Hz display |
| - 40-pin GPIO header |
| - 4 x USB 2.0 Host |
| - SPI NOR Flash |
| - Removable eMMC module |
| - Infrared receiver |
| |
| Schematics are available on the manufacturer website. |
| |
| U-Boot Compilation |
| ------------------ |
| |
| .. code-block:: bash |
| |
| $ export CROSS_COMPILE=aarch64-none-elf- |
| $ make libretech-ac_defconfig |
| $ make |
| |
| U-Boot Signing with Pre-Built FIP repo |
| -------------------------------------- |
| |
| .. code-block:: bash |
| |
| $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1 |
| $ cd amlogic-boot-fip |
| $ mkdir my-output-dir |
| $ ./build-fip.sh lafrite /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: |
| |
| .. code-block:: bash |
| |
| $ 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 libretech-ac amlogic-u-boot |
| $ cd amlogic-u-boot |
| $ wget https://raw.githubusercontent.com/BayLibre/u-boot/libretech-cc/fip/blx_fix.sh |
| $ make libretech_ac_defconfig |
| $ make |
| $ export UBOOTDIR=$PWD |
| |
| Download the latest Amlogic buildroot package and extract it: |
| |
| .. code-block:: bash |
| |
| $ wget http://openlinux2.amlogic.com:8000/ARM/filesystem/Linux_BSP/buildroot_openlinux_kernel_4.9_fbdev_20180418.tar.gz |
| $ tar xfz buildroot_openlinux_kernel_4.9_fbdev_20180418.tar.gz buildroot_openlinux_kernel_4.9_fbdev_20180418/bootloader |
| $ export BRDIR=$PWD/buildroot_openlinux_kernel_4.9_fbdev_20180418 |
| |
| Go back to the mainline U-Boot source tree then: |
| |
| .. code-block:: bash |
| |
| $ mkdir fip |
| |
| $ cp $UBOOTDIR/build/scp_task/bl301.bin fip/ |
| $ cp $UBOOTDIR/build/board/amlogic/libretech_ac/firmware/bl21.bin fip/ |
| $ cp $UBOOTDIR/build/board/amlogic/libretech_ac/firmware/acs.bin fip/ |
| $ cp $BRDIR/bootloader/uboot-repo/bl2/bin/gxl/bl2.bin fip/ |
| $ cp $BRDIR/bootloader/uboot-repo/bl30/bin/gxl/bl30.bin fip/ |
| $ cp $BRDIR/bootloader/uboot-repo/bl31/bin/gxl/bl31.img fip/ |
| $ cp u-boot.bin fip/bl33.bin |
| |
| $ sh $UBOOTDIR/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 |
| |
| $ $BRDIR/bootloader/uboot-repo/fip/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0 |
| |
| $ sh $UBOOTDIR/blx_fix.sh \ |
| fip/bl2_acs.bin \ |
| fip/zero_tmp \ |
| fip/bl2_zero.bin \ |
| fip/bl21.bin \ |
| fip/bl21_zero.bin \ |
| fip/bl2_new.bin \ |
| bl2 |
| |
| $ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin |
| $ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img |
| $ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin |
| $ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig |
| $ $BRDIR/bootloader/uboot-repo/fip/gxl/aml_encrypt_gxl --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 |
| |
| Then write U-Boot to USB or SPI-NOR with: |
| |
| .. code-block:: bash |
| |
| $ 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 |
