IoTGateway/BSP/Linux/APQ8016/BSP User Guide V1

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Getting Started

Package Content

An official build release consists of the following contents. We take V1.050 for RSB-4760 as example.

Filename Usage
4760LIV1050_sd_install.img.gz Installation SD card image
4760LIV1050_2017-05-19_misc.tgz Kernel, DTS & kernel modules
4760LIV1050_2017-05-19.tgz Image binaries (boot image & rootfs)
4760LIV1050_2017-05-19.csv Official build information
4760LBV1050_2017-05-19_sdk.tgz SDK installer
4760LBV1050_2017-05-19.tgz BSP source code, including bootloader binaries
*.md5, log.tgz & *.log MD5 checksum & Log files

Conventions

${BSP_HOME}: home directory of the BSP

${BDIR} : build directory (e.g. build/)

${MACHINE} : available target boards list below

rsb-4760 / epc-r4761

${DISTRO} : Linux distribution

rpb / rpb-wayland

${RPB-IMAGES} : meta-rpb provides the following images

rpb-console-image / rpb-desktop-image / rpb-minimal-image / rpb-qt5-image / rpb-weston-image

Build Environment on Host

Currently, we adopt Docker as build environment.

You can get the latest version of advrisc/u14.04-410clbv1 Docker image for developing Qualcomm APQ8016 projects.

If you don't know much about Docker, please refer to IoTGateway/Docker for details.

BSP

BSP Source

You have two methods to put BSP into Docker container.

[1] Download BSP from GitHub

The oe-rpb-manifest @GitHub is our manifest repository for Qualcomm APQ8016 projects. You can use repo init & repo sync to get the entire BSP we put on GitHub.

Create your own BSP folder first.

$ mkdir ${BSP_HOME}
$ cd ${BSP_HOME}

To get the latest version of meta-advantech layer, you can do this.

$ repo init -u https://github.com/ADVANTECH-Corp/oe-rpb-manifest.git -b morty -m 17.06.xml

To get an official release version, you can assign a specific xml, e.g. 410cLBV1060.xml. (Note: This XML does not exist yet. Just an example.)

$ repo init -u https://github.com/ADVANTECH-Corp/oe-rpb-manifest.git -b morty -m 410cLBV1060.xml

Finally, pull down the BSP by running

$ repo sync

Checking the steps in oe-rpb-manifest for details.

[2] Copy BSP tarball into Container

The BSP tarball file can be found in BSP & Image Binaries field in OS Support List.

You can use docker cp to do this.

// Copy BSP source code into container
$ docker cp 410cLBV1050_2017-05-19.tgz <your container id>:/home/adv

Or Use docker run with -v options to enable data volume. Then, you are able to put the BSP into the data volume folder.

For example, you can put the BSP into /home/root/workspace folder.

$ docker run -it --name docker_test -v /home/root/workspace:/home/adv/BSP advrisc/u14.04-410clbv1:20170605/bin/bash

BSP Content

The descriptions of some important folders in BSP are listed below:

bitbake/  : Yocto build command

bootloader/ : Bootloader binaries including of CDT, SBL, RPM, LK, etc.

layers/ : Sources for meta-layers

        meta-96boards/ : meta layer of 96Boards definitions

        meta-advantech/ ':' meta layer by Advantech

        meta-qcom/ : meta layer for APQ8016 configurations

        meta-rpb/ : meta layer for RPB distro

setup-environment : to set up build environment for Yocto

Naming Rule

The tarball/prebuilt image name consists of the model name followed by "LB" or "LI" plus version number and released date.

For example, BSP file name: 410cLBV1050_2017-05-19.tgz

Which "410c" means Dragonboard410c which a demo board for APQ8016 we use

 "LB" is acronym of Linux BSP,

           "V1050" stands for Version 1.050.

Another example, Yocto image name: 4760LIV1040_2017-04-20.tgz

which "4760" stands for RSB-4760

          "LI" is acronym for prebuilt Linux Image.

Pre-built Images

In LIV tarball file, you can get binary images. For example,

boot-Image--4.4-r0-rsb-4760-20170426102349-52.img : Boot Image

rpb-desktop-image-rsb-4760-20170426102349-52.rootfs.img : Root filesystem

 

In BSP tarball file, you can see a zip file in bootloader/ folder. It is bootloader binary images.

advantech_bootloader_emmc_linux-72/

        cdt_1.1_MT52L256M32D1PF.bin : DDR CDT parameters

        emmc_appsboot.mbn : Little Kernel (LK) responsible to load Linux kernel

        flashall : Shell script to flash bootloader binaries

        gpt_both0.bin : GPT partition table

        hyp.mbn : Trust Zone / QHEE

        rpm.mbn : Resource and Power Management (RPM)

        sbl1.mbn : Secondary Boot Loader (SBL)

        tz.mbn : Trust Zone / QSEE

Build Instructions

Create New Build Environment

To create one new build environment, perform following commands in terminal console:

$ cd ${BSP_HOME}
$ MACHINE=${MACHINE} DISTRO=${DISTRO} source setup-environment ${BDIR}

You need to read and accept the EULA. Press "Y"

Load Existed Build Environment

To continue an existed build environment, perform following commands in terminal console:

$ cd ${BSP_HOME}
$ source setup-environment ${BDIR}

Build Images

To build the desktop image, run

$ bitbake rpb-desktop-image

Build Linux Kernel

To build kernel only, run

$ bitbake linux-linaro-qcomlt

Build Toolchain Installer

To build SDK toolchain installer, perform following commands in terminal console:

$ bitbake ${RPB-IMAGES} -c populate_sdk

Build Bootloader

To build & sign LK bootloader, run

$ cd ${BSP_HOME}
$ cd bootloader/lk
$ make -j4 msm8916 EMMC_BOOT=1 TOOLCHAIN_PREFIX=../toolchain/bin/arm-eabi-

$ mv ./build-msm8916/emmc_appsboot.mbn ./build-msm8916/emmc_appsboot_unsigned.mbn
$ ../signlk/signlk.sh -i=./build-msm8916/emmc_appsboot_unsigned.mbn -o=./build-msm8916/emmc_appsboot.mbn -d

Flash Pre-built Images

We provide two ways to flash pre-built images, Fastboot & Installation SD Card.

Fastboot Tool

By default, we use fastboot utility to flash images into on-board eMMC. On Ubuntu, you can get the package by this way.

$ sudo apt-get install android-tools-fastboot

To download the images, the target device must be booted into fastboot mode.

There are 2 ways to do this.

1. Boot from rescue sdcard

  • Download the rescue image from here. It will be named like advantech_sdcard_rescue-<version>.zip.
  • Flash the rescue image into a sdcard. Then, insert the sdcard and boot from it. You will enter the fastboot mode by default.

2. Hold volume down key when booting

  • While holding down volume down key, power on the target device.
  • After a few seconds, release Vol down key. Then, it will enter fastboot mode as well.
  • You can only do this, when bootloader is already flashed on your target device.

Once you enter fastboot mode, you can plug a USB cable from host to target device. To verify the fastboot connection, you can run:

$ sudo fastboot devices

Bootloader

Besides, you also need the bootloader packages from here, it will be named something like advantech_bootloader_emmc_linux-<version>.zip.

Unzip the file and run the flashall script to update bootloader.

Flash into eMMC

At the end of any successful build you will end up with the following artifacts.

  • ${RPB-IMAGES}-${MACHINE}.ext4.gz and
  • boot-${MACHINE}.img

If your ${RPB-IMAGES} is rpb-desktop-image and ${MACHINE} is rsb-4760, the images will be rpb-desktop-image-rsb-4760.ext4.gz and boot-rsb-4760.img respectively.

You can use fastboot to flash them as well.

$ fastboot flash boot boot-${MACHINE}.img

Because fastboot supports sparse image, you have to transform the rootfs image before flashing.

$ gunzip ${RPB-IMAGES}-${MACHINE}.ext4.gz
$ ext2simg -v ${RPB-IMAGES}-${MACHINE}.ext4 ${RPB-IMAGES}-${MACHINE}.img
$ fastboot flash rootfs ${RPB-IMAGES}-${MACHINE}.img

Installation SDCard

1. Download specific sd_install.img.gz into SD card, e.g. 4760LIV1100_sd_install.img.gz or 4760DIV1060_2017-07-21_sd_installer.img.gz

2. Boot from installation SD card, and Click "Install"

Debian installation 

RTENOTITLE

Yocto installation 


Install_1

3. Select "Yes" to flash all partitions

Install_2

4. Waiting for process finished

Install_3

5. Finish and Reboot

Install_4

Customization

Set Up SDK

Create Debian Images

In this section, we will show you how to generate a Debian image based on the same Yocto kernel.

Customize the kernel source code

In Yocto BSP, you can build kernel easily. To learn how to build kernel, you can refer to oe-rpb-manifest.

Then, we need three output files in your build artifacts.

  • Kernel image (Image-MACHINE.bin)
  • DTS image (dt-Image-MACHINE.img)
  • Modules (modules-MACHINE.tgz)

Now you need to create a valid boot image with your own kernel build.

On your host PC, we need to install the following tools:

$ git clone git://codeaurora.org/quic/kernel/skales

To create the boot image, you also need a ramdisk image, and you can get one from the 96Boards release:

$ wget https://builds.96boards.org/snapshots/dragonboard410c/linaro/debian/227/initrd.img-4.9.21-linaro-lt-qcom

The tool mkbootimg is a standalone application that will process all files and create the boot image that can then be booted on the target board, or flash into the on-board eMMC. The boot image also contains the kernel bootargs, which can be changed as needed in the next command:

$ ./skales/mkbootimg --kernel Image-MACHINE.bin \
                   --ramdisk initrd.img-4.9.21-linaro-lt-qcom \
                   --output boot-MACHINE-debian.img \
                   --dt dt-Image-MACHINE.img \
                   --pagesize 2048 \
                   --base 0x80000000 \
                   --cmdline "root=/dev/disk/by-partlabel/rootfs rw rootwait console=ttyMSM0,115200n8"

After this step, you will get a boot image for Debian called boot-MACHINE-debian.img.

Revise Debian Rootfs

Basically, we can adopt Linaro's Debian rootfs directly with a little modifications for kernel modules. First, you can get the Debian rootfs from the 96Boards release:

$ wget https://builds.96boards.org/snapshots/dragonboard410c/linaro/debian/227/linaro-stretch-alip-qcom-snapdragon-arm64-20170427-227.img.gz

Second, unzip the file and transform it from sparse image to raw image.

$ gunzip linaro-stretch-alip-qcom-snapdragon-arm64-20170427-227.img.gz
$ simg2img linaro-stretch-alip-qcom-snapdragon-arm64-20170427-227.img rootfs.raw

Then, you are able to mount the raw rootfs, and update with your kernel modules.

$ sudo mount -o loop rootfs.raw /mnt
$ sudo rm -rf /mnt/lib/modules/

// Copy firmware & modules into /lib
$ tar zxf modules-MACHINE.tgz
$ sudo cp -a lib/* /mnt/lib
$ sudo umount /mnt

Finally, make the rootfs into sparse image.

$ ext2simg -v rootfs.raw linaro-stretch-alip-qcom-snapdragon-arm64-20170427-227-MACHINE.img

Flash Debian Images

Now, you have both boot & rootfs images. You can easily flash them into eMMC via fastboot utility.

$ sudo fastboot erase boot
$ sudo fastboot flash boot boot-MACHINE-debian.img
$ sudo fastboot erase rootfs
$ sudo fastboot flash rootfs linaro-stretch-alip-qcom-snapdragon-arm64-20170427-227-MACHINE.img

Note: After booting up, you have an important thing to do! You have to generate modules.dep and map files.

$ depmod -a

After reboot, the Debian system should work well!