| .. SPDX-License-Identifier: GPL-2.0+ |
| |
| U-Boot for LibreTech CC 'LePotato' (S905X) |
| ========================================== |
| |
| LibreTech CC is a Single Board Computer manufactured by Libre Computer Technology with |
| the following specifications: |
| |
| v1: |
| |
| - Amlogic S905X ARM Cortex-A53 quad-core SoC @ 1.5GHz |
| - ARM Mali 450 GPU |
| - 2GB DDR3 SDRAM |
| - 10/100 Ethernet |
| - HDMI 2.0 4K/60Hz display |
| - 40-pin GPIO header |
| - 4 x USB 2.0 Host |
| - eMMC, microSD |
| - Infrared receiver |
| - Jack for CVBS and Audio |
| |
| v2: |
| |
| - Added SPI NOR |
| - Removed Jack |
| |
| Schematics are available on the manufacturer website. |
| |
| U-Boot Compilation |
| ------------------ |
| |
| .. code-block:: bash |
| |
| $ export CROSS_COMPILE=aarch64-none-elf- |
| $ make libretech-cc_defconfig |
| $ make |
| |
| Use libretech-cc_v2_defconfig for v2. |
| |
| 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 lepotato /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-cc amlogic-u-boot |
| $ cd amlogic-u-boot |
| $ make libretech_cc_defconfig |
| $ make |
| $ export FIPDIR=$PWD/fip |
| |
| Go back to the mainline U-Boot source tree then: |
| |
| .. code-block:: bash |
| |
| $ mkdir fip |
| |
| $ cp $FIPDIR/gxl/bl2.bin fip/ |
| $ cp $FIPDIR/gxl/acs.bin fip/ |
| $ cp $FIPDIR/gxl/bl21.bin fip/ |
| $ cp $FIPDIR/gxl/bl30.bin fip/ |
| $ cp $FIPDIR/gxl/bl301.bin fip/ |
| $ cp $FIPDIR/gxl/bl31.img fip/ |
| $ cp u-boot.bin fip/bl33.bin |
| |
| $ $FIPDIR/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 |
| |
| $ $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0 |
| |
| $ $FIPDIR/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 |
| |
| $ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin |
| $ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img |
| $ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin |
| $ $FIPDIR/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig |
| $ $FIPDIR/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 SD or eMMC 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 |
