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https://github.com/AsahiLinux/u-boot
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e9f9e50926
Improve documentation. Signed-off-by: Christian Hewitt <christianshewitt@gmail.com> Link: https://lore.kernel.org/r/20230320114609.930145-14-christianshewitt@gmail.com [narmstrong: fixed doc build] Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
120 lines
3.7 KiB
ReStructuredText
120 lines
3.7 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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U-Boot for LibreTech CC 'LePotato' (S905X)
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==========================================
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LibreTech CC is a Single Board Computer manufactured by Libre Computer Technology with
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the following specifications:
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v1:
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- Amlogic S905X ARM Cortex-A53 quad-core SoC @ 1.5GHz
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- ARM Mali 450 GPU
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- 2GB DDR3 SDRAM
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- 10/100 Ethernet
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- HDMI 2.0 4K/60Hz display
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- 40-pin GPIO header
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- 4 x USB 2.0 Host
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- eMMC, microSD
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- Infrared receiver
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- Jack for CVBS and Audio
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v2:
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- Added SPI NOR
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- Removed Jack
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Schematics are available on the manufacturer website.
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U-Boot Compilation
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------------------
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.. code-block:: bash
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$ export CROSS_COMPILE=aarch64-none-elf-
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$ make libretech-cc_defconfig
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$ make
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Use libretech-cc_v2_defconfig for v2.
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U-Boot Signing with Pre-Built FIP repo
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--------------------------------------
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.. code-block:: bash
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$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
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$ cd amlogic-boot-fip
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$ mkdir my-output-dir
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$ ./build-fip.sh lepotato /path/to/u-boot/u-boot.bin my-output-dir
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U-Boot Manual Signing
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---------------------
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Amlogic does not provide sources for the firmware and tools needed to create a bootloader
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image so it is necessary to obtain binaries from sources published by the board vendor:
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.. code-block:: bash
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$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
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$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
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$ tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
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$ tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
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$ 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:$PATH
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$ git clone https://github.com/BayLibre/u-boot.git -b libretech-cc amlogic-u-boot
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$ cd amlogic-u-boot
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$ make libretech_cc_defconfig
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$ make
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$ export FIPDIR=$PWD/fip
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Go back to the mainline U-Boot source tree then:
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.. code-block:: bash
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$ mkdir fip
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$ cp $FIPDIR/gxl/bl2.bin fip/
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$ cp $FIPDIR/gxl/acs.bin fip/
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$ cp $FIPDIR/gxl/bl21.bin fip/
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$ cp $FIPDIR/gxl/bl30.bin fip/
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$ cp $FIPDIR/gxl/bl301.bin fip/
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$ cp $FIPDIR/gxl/bl31.img fip/
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$ cp u-boot.bin fip/bl33.bin
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$ $FIPDIR/blx_fix.sh \
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fip/bl30.bin \
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fip/zero_tmp \
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fip/bl30_zero.bin \
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fip/bl301.bin \
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fip/bl301_zero.bin \
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fip/bl30_new.bin \
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bl30
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$ $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
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$ $FIPDIR/blx_fix.sh \
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fip/bl2_acs.bin \
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fip/zero_tmp \
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fip/bl2_zero.bin \
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fip/bl21.bin \
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fip/bl21_zero.bin \
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fip/bl2_new.bin \
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bl2
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$ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
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$ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
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$ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
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$ $FIPDIR/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
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$ $FIPDIR/gxl/aml_encrypt_gxl --bootmk \
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--output fip/u-boot.bin \
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--bl2 fip/bl2.n.bin.sig \
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--bl30 fip/bl30_new.bin.enc \
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--bl31 fip/bl31.img.enc \
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--bl33 fip/bl33.bin.enc
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Then write U-Boot to SD or eMMC with:
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.. code-block:: bash
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$ DEV=/dev/boot_device
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$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
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$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440
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