U-Boot for Khadas VIM3 (A311D)

Khadas VIM3 is a Single Board Computer manufactured by Shenzhen Wesion Technology Co. Ltd with the following specifications:

Amlogic A311D Arm Cortex-A53 dual-core + Cortex-A73 quad-core SoC

4GB LPDDR4 SDRAM

Gigabit Ethernet

HDMI 2.1 display

40-pin GPIO header

1 x USB 3.0 Host, 1 x USB 2.0 Host

eMMC, microSD

M.2

Infrared receiver

Schematics are available on the manufacturer website.

PCIe Setup

The on-board MCU can mux the PCIe/USB3.0 shared differential lines using a FUSB340TMX USB 3.1 SuperSpeed Data Switch between a USB3.0 Type-A connector and an M.2 Key M slot. The PHY driving these differential lines is shared between the USB3.0 controller and the PCIe Controller, thus only a single controller can use it.

To setup for PCIe run the following commands from U-Boot then power-cycle the board:

i2c dev i2c@5000
i2c mw 0x18 0x33 1

To revert to USB3.0 run the following commands from U-Boot then power-cycle the board:

i2c dev i2c@5000
i2c mw 0x18 0x33 0

U-Boot Compilation

$exportCROSS_COMPILE=aarch64-none-elf-
$makekhadas-vim3_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.shkhadas-vim3/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=vim3-u-boot
$gitclone--depth1https://github.com/khadas/u-boot.git-bkhadas-vims-v2015.01$DIR
$cdvim3-u-boot
$makekvim3_defconfig
$makeCROSS_COMPILE=aarch64-none-elf-
$exportUBOOTDIR=$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
$cp$UBOOTDIR/build/scp_task/bl301.binfip/
$cp$UBOOTDIR/build/board/khadas/kvim3/firmware/acs.binfip/
$cp$UBOOTDIR/fip/g12b/bl2.binfip/
$cp$UBOOTDIR/fip/g12b/bl30.binfip/
$cp$UBOOTDIR/fip/g12b/bl31.imgfip/
$cp$UBOOTDIR/fip/g12b/ddr3_1d.fwfip/
$cp$UBOOTDIR/fip/g12b/ddr4_1d.fwfip/
$cp$UBOOTDIR/fip/g12b/ddr4_2d.fwfip/
$cp$UBOOTDIR/fip/g12b/diag_lpddr4.fwfip/
$cp$UBOOTDIR/fip/g12b/lpddr3_1d.fwfip/
$cp$UBOOTDIR/fip/g12b/lpddr4_1d.fwfip/
$cp$UBOOTDIR/fip/g12b/lpddr4_2d.fwfip/
$cp$UBOOTDIR/fip/g12b/piei.fwfip/
$cp$UBOOTDIR/fip/g12b/aml_ddr.fwfip/
$cpu-boot.binfip/bl33.bin
$bashfip/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
$bashfip/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
$$UBOOTDIR/fip/g12b/aml_encrypt_g12b--bl30sig--inputfip/bl30_new.bin\
--outputfip/bl30_new.bin.g12a.enc\
--levelv3
$$UBOOTDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl30_new.bin.g12a.enc\
--outputfip/bl30_new.bin.enc\
--levelv3--typebl30
$$UBOOTDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl31.img\
--outputfip/bl31.img.enc\
--levelv3--typebl31
$$UBOOTDIR/fip/g12b/aml_encrypt_g12b--bl3sig--inputfip/bl33.bin--compresslz4\
--outputfip/bl33.bin.enc\
--levelv3--typebl33--compresslz4
$$UBOOTDIR/fip/g12b/aml_encrypt_g12b--bl2sig--inputfip/bl2_new.bin\
--outputfip/bl2.n.bin.sig
$$UBOOTDIR/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 U-Boot 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