U-Boot for BananaPi M2S (A311D & S922X)

BananaPi BPI-M2S ships is a Single Board Computer manufactured by Sinovoip that ships in two variants with Amlogic S922X or A311D SoC and the following common specification:

16GB eMMC
HDMI 2.1a video
2x 10/100/1000 Base-T Ethernet (1x RTL8211F, 1x RTL811H)
2x USB 2.0 ports
2x Status LED’s (green/blue)
1x Power/Reset button
1x micro SD card slot
40-pin GPIO header
PWM fan header
UART header

The S992X variant has: - 2GB LPDDR4 RAM

The A311D variant has:

4GB LPDDR4 RAM
NPU (5.0 TOPS)
MIPI DSI header
MIPI CSI header

An optional RTL8822CS SDIO WiFi/BT mezzanine is available for both board variants.

Schematics are available from the manufacturer: https://wiki.banana-pi.org/Banana_Pi_BPI-M2S

U-Boot Compilation

$exportCROSS_COMPILE=aarch64-none-elf-
$makebananapi-m2s_defconfig
$make

U-Boot Signing with Pre-Built FIP repo

$gitclonehttps://github.com/LibreELEC/amlogic-boot-fip--depth=1
$cdamlogic-boot-fip
$mkdirmy-output-dir
$./build-fip.shbananapi-m2s/path/to/u-boot/u-boot.binmy-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:

$wgethttps://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$wgethttps://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$tarxvfJgcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$tarxvfJgcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$exportPATH=$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-m2s
$gitclone--depth1https://github.com/Dangku/amlogic-u-boot.git-bkhadas-g12b-v2015.01-m2s$DIR
$cd$DIR
$makebananapi_m2s_defconfig
$make
$exportUBDIR=$PWD

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

$mkdirfip
$wgethttps://github.com/BayLibre/u-boot/releases/download/v2017.11-libretech-cc/blx_fix_g12a.sh-Ofip/blx_fix.sh
$cp$UBDIR/build/scp_task/bl301.binfip/
$cp$UBDIR/build/board/bananapi/bananpi_m2s/firmware/acs.binfip/
$cp$UBDIR/fip/g12a/bl2.binfip/
$cp$UBDIR/fip/g12a/bl30.binfip/
$cp$UBDIR/fip/g12a/bl31.imgfip/
$cp$UBDIR/fip/g12a/ddr3_1d.fwfip/
$cp$UBDIR/fip/g12a/ddr4_1d.fwfip/
$cp$UBDIR/fip/g12a/ddr4_2d.fwfip/
$cp$UBDIR/fip/g12a/diag_lpddr4.fwfip/
$cp$UBDIR/fip/g12a/lpddr3_1d.fwfip/
$cp$UBDIR/fip/g12a/lpddr4_1d.fwfip/
$cp$UBDIR/fip/g12a/lpddr4_2d.fwfip/
$cp$UBDIR/fip/g12a/piei.fwfip/
$cp$UBDIR/fip/g12a/aml_ddr.fwfip/
$cpu-boot.binfip/bl33.bin
$shfip/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
$shfip/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
$$UBDIR/fip/g12b/aml_encrypt_g12b--bl30sig--inputfip/bl30_new.bin\
--outputfip/bl30_new.bin.g12a.enc\
--levelv3
$$UBDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl30_new.bin.g12a.enc\
--outputfip/bl30_new.bin.enc\
--levelv3--typebl30
$$UBDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl31.img\
--outputfip/bl31.img.enc\
--levelv3--typebl31
$$UBDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl33.bin--compresslz4\
--outputfip/bl33.bin.enc\
--levelv3--typebl33--compresslz4
$$UBDIR/fip/g12b/aml_encrypt_g12b--bl2sig--inputfip/bl2_new.bin\
--outputfip/bl2.n.bin.sig
$$UBDIR/fip/g12b/aml_encrypt_g12b--bootmk\
--outputfip/u-boot.bin\
--bl2fip/bl2.n.bin.sig\
--bl30fip/bl30_new.bin.enc\
--bl31fip/bl31.img.enc\
--bl33fip/bl33.bin.enc\
--ddrfw1fip/ddr4_1d.fw\
--ddrfw2fip/ddr4_2d.fw\
--ddrfw3fip/ddr3_1d.fw\
--ddrfw4fip/piei.fw\
--ddrfw5fip/lpddr4_1d.fw\
--ddrfw6fip/lpddr4_2d.fw\
--ddrfw7fip/diag_lpddr4.fw\
--ddrfw8fip/aml_ddr.fw\
--ddrfw9fip/lpddr3_1d.fw\
--levelv3

Then write the image to SD or eMMC with:

$DEV=/dev/boot_device
$ddif=fip/u-boot.bin.sd.binof=$DEVconv=fsync,notruncbs=512skip=1seek=1
$ddif=fip/u-boot.bin.sd.binof=$DEVconv=fsync,notruncbs=1count=440