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.. SPDX-License-Identifier: GPL-2.0+
U-Boot for BananaPi CM4 with CM4IO (A311D)
==========================================
BPI-CM4 is a system-on-module board manufactured by Sinovoip. It follows the Raspberry Pi
CM4 interface specification but with a single HDMI port and a single DSI output:
- Amlogic A311D Arm Cortex-A53 dual-core + Cortex-A73 quad-core SoC
- 4GB DDR4 SDRAM
- 16GB eMMC
- NPU
- HDMI 2.1 display
- Gigabit Ethernet
- RTL8822CS WiFi (a/b/g/n/ac) + BT 5.0
BPI-CM4IO is a carrier board for the BPI-CM4 module with the following specification:
- CM4 interface
- HDMI interface
- MIPI CSI interface
- MIPI DSI interface
- Ethernet interface
- PCIe interface
- SD (micro)
- SIM (micro)
- 26-pin GPIO
- UART serial
- 1x USB-C (power)
- 2x USB 2.0
Schematics are available from the manufacturer: https://wiki.banana-pi.org/Banana_Pi_BPI-CM4
U-Boot Compilation
------------------
.. code-block:: bash
$ export CROSS_COMPILE=aarch64-none-elf-
$ make bananapi-cm4io_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 bananapi-cm4io /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
$ DIR=bananapi-cm4io
$ git clone --depth 1 https://github.com/Dangku/amlogic-u-boot.git -b khadas-g12b-v2015.01-m2s $DIR
$ cd $DIR
$ make bananapi_cm4_defconfig
$ make
$ export UBDIR=$PWD
Go back to the mainline U-Boot source tree then:
.. code-block:: bash
$ 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 $UBDIR/build/scp_task/bl301.bin fip/
$ cp $UBDIR/build/board/bananapi/bananpi_cm4/firmware/acs.bin fip/
$ cp $UBDIR/fip/g12a/bl2.bin fip/
$ cp $UBDIR/fip/g12a/bl30.bin fip/
$ cp $UBDIR/fip/g12a/bl31.img fip/
$ cp $UBDIR/fip/g12a/ddr3_1d.fw fip/
$ cp $UBDIR/fip/g12a/ddr4_1d.fw fip/
$ cp $UBDIR/fip/g12a/ddr4_2d.fw fip/
$ cp $UBDIR/fip/g12a/diag_lpddr4.fw fip/
$ cp $UBDIR/fip/g12a/lpddr3_1d.fw fip/
$ cp $UBDIR/fip/g12a/lpddr4_1d.fw fip/
$ cp $UBDIR/fip/g12a/lpddr4_2d.fw fip/
$ cp $UBDIR/fip/g12a/piei.fw fip/
$ cp $UBDIR/fip/g12a/aml_ddr.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
$ $UBDIR/fip/g12b/aml_encrypt_g12b --bl30sig --input fip/bl30_new.bin \
--output fip/bl30_new.bin.g12a.enc \
--level v3
$ $UBDIR/fip/g12b/aml_encrypt_g12b --bl3sig --input fip/bl30_new.bin.g12a.enc \
--output fip/bl30_new.bin.enc \
--level v3 --type bl30
$ $UBDIR/fip/g12b/aml_encrypt_g12b --bl3sig --input fip/bl31.img \
--output fip/bl31.img.enc \
--level v3 --type bl31
$ $UBDIR/fip/g12b/aml_encrypt_g12b --bl3sig --input fip/bl33.bin --compress lz4 \
--output fip/bl33.bin.enc \
--level v3 --type bl33 --compress lz4
$ $UBDIR/fip/g12b/aml_encrypt_g12b --bl2sig --input fip/bl2_new.bin \
--output fip/bl2.n.bin.sig
$ $UBDIR/fip/g12b/aml_encrypt_g12b --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 \
--ddrfw8 fip/aml_ddr.fw \
--ddrfw9 fip/lpddr3_1d.fw \
--level v3
Then write the image 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
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