Difference between revisions of "VAR-SOM-MX6 Yocto GS R5"

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Line 119: Line 119:
 
<pre>$ tar xvf var_yocto_v5b1.tar.bz2
 
<pre>$ tar xvf var_yocto_v5b1.tar.bz2
 
$ variscite/install</pre>
 
$ variscite/install</pre>
{{note|Comment:<br/>This method will keep the git repositories. It will enable you to track Variscite and your changes.|info}}
+
{{note|Comment:<br/>This method will preserve the git repositories. It will enable you to track Variscite's changes, and your own.|info}}
  
 
= Setup and Customize your Yocto build =
 
= Setup and Customize your Yocto build =
Line 126: Line 126:
 
<pre>$ . ./setup-environment build_var
 
<pre>$ . ./setup-environment build_var
 
</pre>
 
</pre>
{{note|Comment:<br/>If you close your terminal and want to build Yocto you should change directory to ~var-som-mx6-dora-v3 and run the above command again. build_var is your build directory and all bitbake commands should run from it|info}}
+
{{note|Comment:<br/>If you close your terminal and wishto build Yocto again, you should change directory to ~/var-som-mx6-dora-v3 and run the above command again. build_var is your build directory and all bitbake commands should run from it|info}}
  
 
== local.conf customizations<br/> ==
 
== local.conf customizations<br/> ==
Line 136: Line 136:
  
 
=== Select VAR-SOM_MX6 SOM version<br/> ===
 
=== Select VAR-SOM_MX6 SOM version<br/> ===
 
+
One of:<br/>MACHINE&nbsp;??= 'varsomimx6q'   - VAR_SOM_MX6 Quad with 1GB DDR<br/>MACHINE&nbsp;??= 'varsomimx6q2'   - VAR_SOM_MX6 Quad 1.2MHz with 2GB DDR<br/>MACHINE&nbsp;??= 'varsomimx6dl'   - VAR_SOM_MX6 Dual Lite with 1GB DDR <br/>MACHINE&nbsp;??= 'varsomimx6solo' - VAR_SOM_MX6 Solo with 1GB DDR or 0.5 GB DDR
One of:<br/>MACHINE&nbsp;??= 'varsomimx6q'<br/>MACHINE&nbsp;??= 'varsomimx6q2'<br/>MACHINE&nbsp;??= 'varsomimx6dl'<br/>MACHINE&nbsp;??= 'varsomimx6solo'
 
  
 
=== Parallel build<br/> ===
 
=== Parallel build<br/> ===
Line 160: Line 159:
 
|-
 
|-
 
| var-image-test<br/>
 
| var-image-test<br/>
| Builds contents core-image-base plus Freescale test applications and multimedia components.<br/>
+
| Image contains core-image-base plus Freescale test applications and multimedia components.<br/>
 
|-
 
|-
 
| var-image-x11<br/>
 
| var-image-x11<br/>
| Builds contents of core-image-sato with Freescale test applications and multimedia with hardware accelerated X11<br/>
+
| Image contains core-image-sato with Freescale test applications and multimedia with hardware accelerated X11<br/>
 
|}
 
|}
  
The resulted images are in tmp/deploy/images/varsomimx6q.<br/>Looking at tmp/deploy/images/varsomimx6q you will find 6 main files that are linked to the actual file<br/>
+
The resulted images are locaated in tmp/deploy/images/varsomimx6q.<br/>Looking at tmp/deploy/images/varsomimx6q you will find 6 main files that are linked to the actual file<br/>
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 207: Line 206:
 
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som-ldo.dtb /media/rootfs/opt/images/imx6q-var-som-ldo.dtb
 
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som-ldo.dtb /media/rootfs/opt/images/imx6q-var-som-ldo.dtb
 
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som.dtb /media/rootfs/opt/images/imx6q-var-som.dtb
 
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som.dtb /media/rootfs/opt/images/imx6q-var-som.dtb
 +
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6dl-var-som.dtb /media/rootfs/opt/images/imx6sl-var-som.dtb
 +
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6sl-var-som.dtb /media/rootfs/opt/images/imx6dl-var-som.dtb
 
$ sudo cp tmp/deploy/images/varsomimx6q/var-image-x11-varsomimx6q.ubi /media/rootfs/opt/images
 
$ sudo cp tmp/deploy/images/varsomimx6q/var-image-x11-varsomimx6q.ubi /media/rootfs/opt/images
 
$ sudo umount /media/rootfs
 
$ sudo umount /media/rootfs
Line 230: Line 231:
 
|}
 
|}
  
= U-Boot options<br/> =
+
= Next steps <br/> =
 +
In sections 1-6 we explained how to build Yocto for VAR-SOM-MX6. We explained the results for nand (UBI) and for sd-card.
 +
At this point you should have a bootable sd-card with UBI images on it. You should be able to boot from the sd-card using the boot select button and flash the nand.
 +
Next steps:
 +
* Build and deploy the compiler and tools.
 +
* Fetch u-boot and compile it out of Yocto tools.
 +
* Fetch Linux kernel and compile it out of Yocto tools.
 +
 
 +
= Toolchain =
 +
 
 +
Build the toolchain by:
 +
<pre>$ bitbake meta-ide-support
 +
$ bitbake meta-toolchain
 +
</pre>
 +
The output will be located at tmp/deploy/sdk/. On a 64 bit Ubuntu you will get:
  
By default all images are built for NAND-based U-Boot. If you want to change the setting to build SD-Card images, change the board file.
+
poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.sh.
  
under ~/var_yocto/sources/meta-fsl-arm-extra/conf/machine you will find Variscite board definitions.
+
Install the tools by running:
 +
<pre>$ tmp/deploy/sdk/poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh</pre>
 +
The toolchain name depend on your build machine and may change.
  
varsommx6q.conf<br/>varsommx6solo.conf<br/>varsommx6dual.conf
+
= Build U-Boot out of Yocto tree<br/> =
  
Edit you specifc board and change UBOOT_MACHINE according to the folowing table.
+
Get sources:
 +
<pre>$ cd ~/var-som-mx6-dora-v5
 +
$ git clone git://github.com/varigit/uboot-imx
 +
$ cd uboot-imx/
 +
$ git checkout -b imx_v2013.04_3.10.17_1.0.0_beta_var1 remotes/origin/imx_v2013.04_3.10.17_1.0.0_beta_var1
 +
</pre>
 +
Build u-boot:
 +
<pre>$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi:$PATH
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
 +
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- <Your config file from the table below>
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi-
 +
</pre>
 +
Flash u-boot to the sd-card:
 +
<pre>$ sudo dd if=u-boot.imx of=/dev/sdxxx bs=512 seek=2; sync
 +
</pre>
 +
In case of UBI copy it to the sd-card:
 +
<pre>$ sudo cp u-boot.imx /media/rootfs.opt/images
 +
</pre>
 +
Un mount the sdcard.
 +
 +
<pre>$ sudo umount /dev/sdxxx
 +
</pre>
 +
{{note|Comment:<br/>Replace /dev/sdxxx with the actual device name. Use dmesq to find the right one.|info}}
  
 +
== Avilable u-boot configurations ==
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 245: Line 285:
 
! scope="col" | Built for<br/>
 
! scope="col" | Built for<br/>
 
|-
 
|-
| mx6q_var_som_config<br/>
+
| vsmq_10m10g_sd_config<br/>
| VAR-SOM-MXQ/D 1GB DDR,&nbsp; boot from MMC<br/>
+
| VAR-SOM-MXQ/D 1GHz CPU 1GB DDR,&nbsp; boot from MMC<br/>
 
|-
 
|-
| mx6q_2g_var_som_config<br/>
+
| vsmq_12m20g_sd_config<br/>
| VAR-SOM-MXQ/D 2GB DDR,&nbsp; boot from MMC<br/>
+
| VAR-SOM-MXQ/D 1.2GHz CPU 2GB DDR,&nbsp; boot from MMC<br/>
 
|-
 
|-
| mx6d_0_5g_var_som<br/>
+
| vsmd_10m05g_sd_config<br/>
| VAR-SOM-MXD 0.5GB DDR,&nbsp; boot from MMC<br/>
+
| VAR-SOM-MXD 1GHz CPU 0.5GB DDR,&nbsp; boot from MMC<br/>
 
|-
 
|-
| mx6dl_var_som_config<br/>
+
| vsmdl_10m10g_sd_config<br/>
| VAR-SOM-MXDL, 1.0 GB DDR &nbsp;&nbsp;&nbsp; boot from MMC<br/>
+
| VAR-SOM-MXDL, 1GHz CPU 1.0 GB DDR &nbsp;&nbsp;&nbsp; boot from MMC<br/>
 
|-
 
|-
| mx6solo_var_som_config<br/>
+
| vsms_10m10g_sd_config<br/>
| VAR-SOM-MXSolo, 0.5 or 1.0 GB DDR boot from MMC<br/>
+
| VAR-SOM-MXSolo, 1GHz CPU 0.5 or 1.0 GB DDR boot from MMC<br/>
 
|-
 
|-
| mx6q_var_som_nand_config<br/>
+
| vsmq_10m10g_nand_config<br/>
| VAR-SOM-MXQ/D,&nbsp; boot from NAND<br/>
+
| VAR-SOM-MXQ/D 1GHz CPU 1GB DDR,&nbsp; boot from NAND<br/>
 
|-
 
|-
| mx6q_2g_var_som_nand_config<br/>
+
| vsmq_12m20g_nand_config<br/>
| VAR-SOM-MXQ/D 2GB DDR,&nbsp; boot from NAND<br/>
+
| VAR-SOM-MXQ/D 1.2GHz CPU 2GB DDR,&nbsp; boot from NAND<br/>
 
|-
 
|-
| mx6d_0_5g_var_nand_som<br/>
+
| vsmd_10m05g_nand_som<br/>
| VAR-SOM-MXD 0.5GB DDR,&nbsp; boot from NAND<br/>
+
| VAR-SOM-MXD 1GHz CPU 0.5GB DDR,&nbsp; boot from NAND<br/>
 
|-
 
|-
| mx6dl_var_som_nand_config<br/>
+
| vsmdl_10m10g_nand_config<br/>
| VAR-SOM-MXDL,1.0 GB DDR &nbsp;&nbsp;&nbsp; boot from NAND<br/>
+
| VAR-SOM-MXDL,1GHz CPU 1.0 GB DDR &nbsp;&nbsp;&nbsp; boot from NAND<br/>
 
|-
 
|-
| mx6solo_var_som_nand_config<br/>
+
| vsms_10m10g_nand_config<br/>
| VAR-SOM-MXSolo, 0.5 or 1.0 GB DDR boot from NAND<br/>
+
| VAR-SOM-MXSolo, 1GHz CPU 0.5 or 1.0 GB DDR boot from NAND<br/>
 
|}
 
|}
 
= Toolchain =
 
 
Build the toolchain by:
 
<pre>$ bitbake meta-ide-support
 
$ bitbake meta-toolchain
 
</pre>
 
The output will be located at tmp/deploy/sdk/. On a 64 bit Ubuntu you will get:
 
 
poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.sh.
 
 
Install the tools by running:
 
<pre>$ tmp/deploy/sdk/poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh</pre>
 
The toolchain name depend on your build machine and may change.
 
  
 
= Build Linux out of Yocto tree<br/> =
 
= Build Linux out of Yocto tree<br/> =
 
+
Get sources:
Prepare the Linux kernel
+
<pre>$ cd ~/var-som-mx6-dora-v5/
<pre>$ bitbake -c cleansstate linux-variscite
+
$ git clone git://github.com/varigit/linux-2.6-imx.git
$ bitbake -c devshell linux-variscite </pre>
+
$ cd linux-2.6-imx/
This will open a new shell at ...tmp/work/varsommx6q-poky-linux-gnueabi/linux-variscite/3.0.35-r0/git#
+
$ git checkout -b imx_3.10.17_1.0.0_ga_beta_var2 remotes/origin/imx_3.10.17_1.0.0_ga_beta_var2
 
+
</pre>  
Copy the Linux kernel to a new folder
 
<pre>$ mkdir ~/var-som-mx6-dora-v4/linux-imx
 
$ cp -a * ~/var-som-mx6-dora-v4/linux-imx
 
$ exit
 
</pre>
 
change dir into the new Linux kernel folder
 
<pre>$ cd ~/var-som-mx6-dora-v4/linux-imx
 
</pre>
 
Set the tools path:
 
<pre>$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi:$PATH
 
</pre>
 
Clean the Linux kernel:
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
 
</pre>
 
Configure the Linux kernel:
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- var_som_mx6_defconfig
 
</pre>
 
Change configuration if required:
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- menuconfig
 
</pre>
 
 
Build the Linux kernel:
 
Build the Linux kernel:
<pre>$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- uImage
+
<pre>$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi:$PATH
 +
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
 +
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx_v7_var_defconfig
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- uImage
 
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules
 
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules
 +
Build the device tree
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6dl-var-som.dtb
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som.dtb
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som-ldo.dtb
 +
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6sl-var-som.dtb
 
</pre>
 
</pre>
The best practice of testing the new Linux kernel is using TFTP&NFS. Described in the apendix.
+
Copy the uImage and device tree to the sd-card boot partition or to the opt/image in order to be flashed to the nand.
<pre>$ cp arch/arm/boot/uImage /tftpboot
+
Copy modules to the sd-card
</pre>
+
<pre>$ sudo make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules_install INSTALL_MOD_PATH=/media/rootfs/
Install the Linux modules into the rootfs file system
 
<pre>$ sudo make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules_install INSTALL_MOD_PATH=../rootfs
 
</pre>
 
= Build U-Boot out of Yocto tree<br/> =
 
 
 
Prepare the U-Boot boot loader
 
<pre>$ bitbake -c cleansstate u-boot-variscite
 
$ bitbake -c devshell u-boot-variscite </pre>
 
This will open a new shell at ...tmp/work/varsommx6q-poky-linux-gnueabi/linux-variscite/3.0.35-r0/git#
 
 
 
Copy the U-Boot boot loader to a new folder
 
<pre>$ mkdir ~/var-som-mx6-dora-v4/uboot-imx
 
$ cp -a * ~/var-som-mx6-dora-v4/uboot-imx
 
$ exit
 
</pre>
 
change dir into the new u-boot folder
 
<pre>$ cd ~/var-som-mx6-dora-v4/uboot-imx</pre>
 
set the tools path if required
 
<pre>$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi:$PATH
 
</pre>
 
Clean the U-Boot
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
 
</pre>
 
Configure the U-Boot boot loader
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mx6q_var_som_nand_config
 
</pre>
 
Build the U-Boot boot loader
 
<pre>$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi-
 
</pre>
 
Use our NAND-recovery sd-card to burn your u-boot to the NAND-Flash.
 
 
 
In case you build an sd-card version use
 
<pre>sudo dd if=u-boot.bin of=/dev/mmcblk0 bs=512 seek=2 skip=2 conv=fsync
 
</pre>
 
Set the /dev/mmcblk0 according to you host sd-card device.
 
 
 
= Creating a recovery SD-Card =
 
 
 
{{note|Comment:<br/> we use Ubuntu 12.04 mount convention and a laptop media name. "/media/var_som_mx6_rf" and "/dev/mmcblk0" are widely used in this section.<br>You should be aware of this and change the media name to you host machine name.|info}}
 
 
 
Create a new folder:
 
<pre>$ mkdir ~/my_recovery_sd
 
$ cd ~/my_recovery_sd
 
</pre>
 
Insert Variscite recovery SD-Card version 19 into your host machine.
 
 
 
Copy the recovery folder from the SD-Card into your local folder:
 
<pre>$ sudo cp -a /media/var_mx6_<x>/opt/recovery ./
 
$ sudo cp /media/var_mx6_<x>/sbin/nand-recovery.sh ./
 
 
</pre>
 
</pre>
Update your local folder with the files you created during the Yocto build:
 
<pre>$ sudo cp ~/var-som-mx6-dora-v4/build_mx6q/tmp/deploy/images/varsommx6q/fsl-image-gui-varsommx6q.ubi recovery/Yocto/rootfs.ubi.img
 
$ sudo cp ~/var-som-mx6-dora-v4/build_mx6q/tmp/deploy/images/varsommx6q/fsl-image-gui-varsommx6q.tar.bz2 recovery/Yocto/rootfs.tar.bz2
 
$ sudo cp ~/var-som-mx6-dora-v4/build_mx6q/tmp/deploy/images/varsommx6q/uImage recovery/Yocto/uImage
 
$ sudo cp ~/var-som-mx6-dora-v4/build_mx6q/tmp/deploy/images/varsommx6q/u-boot.bin recovery/Yocto/u-boot.bin
 
</pre>
 
Copy the SD-Card image from your Yocto build folder to the local recovery folder:
 
<pre>$ sudo cp ~/var-som-mx6-dora-v4/build_mx6q/tmp/deploy/images/varsommx6dual/fsl-image-gui-varsommx6dual.sdcard ./
 
</pre>
 
Build U-Boot for SD-Card. Follow the "Build U-Boot out of Yocto tree" section.
 
 
Configure U-Boot with:
 
<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mx6q_var_som_config
 
</pre>
 
Build U-Boot:
 
<pre>$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi-
 
</pre>
 
Copy U-Boot from your U-Boot build folder to the local recovery folder:
 
<pre>$ cp u-boot.bin ~/my_recovery_sd
 
</pre>
 
From ~/my_recovery_sd folder
 
 
Unmount your SD-Card.
 
 
Build the SD-Card. First flash the SD-Card image and U-Boot.
 
<pre>$ sudo dd if=fsl-image-gui-varsommx6q.sdcard of=/dev/mmcblk0 bs=1M
 
$ sudo dd if=u-boot.bin of=/dev/mmcblk0 bs=512 seek=2 skip=2 conv=fsync
 
$ sync
 
</pre>
 
Set the SD-Card label:
 
<pre>$ Sudo apt-get install gparted
 
$ sudo gparted
 
Set the label to var_som_mx6_rf
 
</pre>
 
Mount the SD-Card. You can simply remove it and inster it again to your host machine.
 
 
Copy all files from the recovery folder on your host machibe into the SD-Card:
 
<pre>$ sudo cp -a recovery/ /media/var_som_mx6_rf/opt/
 
$ sudo cp nand-recovery.sh /media/var_som_mx6_rf/sbin/
 
$ sudo rm /media/var_som_mx6_rf/var/lib/alsa/asound.state
 
</pre>
 
If you want you can back up your new SD-Card image:
 
 
Un mount the SD-Card
 
<pre>$ sudo dd of=mx6qd-som-nand-recovery-sd.v19.img if=/dev/mmcblk0 bs=1M </pre>
 
{{note|Comment:<br/>I used "/dev/mmcblk0" as the SD-Card device name. You should replace it with your own SD-Card device name.|info}}
 
  
 
= Useful Bitbake commands =
 
= Useful Bitbake commands =

Latest revision as of 10:19, 23 July 2014

VAR-SOM-MX6 - Yocto fsl-L3.10.17_1.0.0 Dora R5 Beta1

1 Introduction

  • This Yocto Dora release is based on Freescale fsl-L3.10.17_1.0.0GA release.
  • Linux kernel: linux-imx_3.10.17_1.0.0_ga.
  • Uboot: u-boot-imx-2013.04.
  • Yocto Dora: Based on fsl-L3.10.17_1.0.0_iMX6qdls Freescale release (previous versions were based on the community release). Yocto Dora was re-structured as most of Variscite support code is located in meta-variscite folder.

2 Supported hardware and features

Feature
Description
Board support
VAR-DVK-MX6,VAR-SOM-MX6
CPU

i.MX6 Quad
i.MX6 Dual
i.MX6 Dual lite
i.MX6 Solo

Software platform

Yocto Dora release.
Freescale release version 4.1
Meta freescale community release for Dora

Nand Recovery
NAND Flash size support
0.5,1.0,2.0,4.0 GB
DDR size support configuration
Solo:0.5,1.0 GB DualLite: 1.0GB Dual: 0.5,1.0GB Quad: 1.0,2.0 GB
SD-Card
+
Ethernet
10/100/1000 Mbps Ethernet
WLAN
802.11 b/g/n
Bluetooth
4.0
CAN bus
+
I2C
+
SPI
+
USB host
+
USB OTG
Device only. Host will be supported on next release
Uarts
x3, up to 3.6 Mbps. Minicom avilable to use with the port
RTC
+
Display HDMI 720P,1080P LVDS0 (On board LVDS to RGB bridge, EVK supports 800x480 resolution) LVDS1 external display
Audio Line IN/ Line out
Camera ov5640 camera sensor. CB402 board can be purchased separately
SATA +

Variscite Yocto Dora release 2 for Freescale i.MX6 version 4.1.

3 Installing required packages

Follow the link below and install all the required packages on your machine.

www.yoctoproject.org/docs/latest/yocto-project-qs/yocto-project-qs.html

For example, if your building machine is an Ubuntu machine:

sudo apt-get install gawk wget git-core diffstat unzip texinfo build-essential chrpath libsdl1.2-dev xterm

Variscite Yocto build is tested with Ubuntu 12.04 lts.

4 Get Yocto Dora for i.MX6 with Variscite VAR-SOM-MX6 support

Use  "repo" to fetch Yocto and apply Variscite's patches for the BSP support.

Install the `repo` utility:

$ mkdir ~/bin (this step may not be needed if the bin folder already exists)
$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$ chmod a+x ~/bin/repo
Add the following line to the .bashrc file to ensure that the ~/bin folder is in your PATH variable
$ export PATH=~/bin:$PATH
NOTE:
we uploaded as a reference the repo we used.

Clone Yocto Dora from github.

$ cd ~
$ mkdir var-som-mx6-dora-v5
$ cd var-som-mx6-dora-v5
$ git config --global user.name "Your Name"
$ git config --global user.email "Your Email"
$ repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-3.10.17-1.0.0_ga
$ repo sync

Download var_yocto_v5b1.tar.bz2 from Variscite's FTP.

$ tar xvf var_yocto_v5b1.tar.bz2
$ variscite/install
Comment:
This method will preserve the git repositories. It will enable you to track Variscite's changes, and your own.

5 Setup and Customize your Yocto build

Setup the environment and use build_var folder

$ . ./setup-environment build_var
Comment:
If you close your terminal and wishto build Yocto again, you should change directory to ~/var-som-mx6-dora-v3 and run the above command again. build_var is your build directory and all bitbake commands should run from it

5.1 local.conf customizations

Edit you local.conf file:

$ gedit conf/local.conf 

Change your SOM version, parallel build and download directory:

5.1.1 Select VAR-SOM_MX6 SOM version

One of:
MACHINE ??= 'varsomimx6q' - VAR_SOM_MX6 Quad with 1GB DDR
MACHINE ??= 'varsomimx6q2' - VAR_SOM_MX6 Quad 1.2MHz with 2GB DDR
MACHINE ??= 'varsomimx6dl' - VAR_SOM_MX6 Dual Lite with 1GB DDR
MACHINE ??= 'varsomimx6solo' - VAR_SOM_MX6 Solo with 1GB DDR or 0.5 GB DDR

5.1.2 Parallel build

Set the build parameters to fully utilize your host machine BB_NUMBER_THREADS = '4'
PARALLEL_MAKE = '-j 6' BB_NUMBER_THREADS should be your host machine's number of threads minus 2 or same. PARALLEL_MAKE should be the number of threads your host machine has plus two.

5.1.3 Download directory.

Recommended to save download time and space. DL_DIR = "/home/<uname>/yocto_dl"

6 Build your image

$ bitbake var-image-x11 

Other image build options:

image name
description
core-image-base
A console-only image that fully supports the target device hardware.
var-image-test
Image contains core-image-base plus Freescale test applications and multimedia components.
var-image-x11
Image contains core-image-sato with Freescale test applications and multimedia with hardware accelerated X11

The resulted images are locaated in tmp/deploy/images/varsomimx6q.
Looking at tmp/deploy/images/varsomimx6q you will find 6 main files that are linked to the actual file

Image Name
How to use
var-image-x11-varsomimx6q.ext3
Not in Use
var-image-x11-varsomimx6q.sdcard

Flash into SD-card and use boot select to boot from.

$ sudo dd if=tmp/deploy/images/varsomimx6q/var-image-x11-varsomimx6q.sdcard of=/dev/devxxx bs=1024k

Build u-boot out of tree for mmc as explained below and

$ sudo dd if=u-boot.imx of=/dev/devxxx bs=512 seek=2; sync

devxxx = mmcblk0 or sdX. Do dmesg after you insert an SD-Card into your build system to figure out the device name

Comment:
Use "$ sudo gparted /dev/devxxx"
  • Lable the second partition and call it "rootfs".
  • Increase the second partition to include all avilable sd-card space.
var-image-x11-varsomimx6q.tar.bz2

Used to create an NFS root file system on the host.

$ sudo mkdir ../rootfs
$ sudo rm -rf ../rootfs/*
$ sudo tar xvf tmp/deploy/images/varsomimx6q/var-image-x11-varsomimx6q.tar.bz2 -C ../rootfs

See apendix for setting an NFS server

var-image-x11-varsomimx6q.ubi

Use the sdcard created above. Copy the file into it and use the folwing commands to flash them into nand.
Coping files (mount the sd-card created above first):

$ sudo mkdir /media/rootfs/opt/images
$ sudo cp tmp/deploy/images/varsomimx6q/u-boot.imx /media/rootfs/opt/images
$ sudo cp tmp/deploy/images/varsomimx6q/uImage     /media/rootfs/opt/images
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som-ldo.dtb /media/rootfs/opt/images/imx6q-var-som-ldo.dtb
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6q-var-som.dtb /media/rootfs/opt/images/imx6q-var-som.dtb
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6dl-var-som.dtb /media/rootfs/opt/images/imx6sl-var-som.dtb
$ sudo cp tmp/deploy/images/varsomimx6q/uImage-imx6sl-var-som.dtb /media/rootfs/opt/images/imx6dl-var-som.dtb
$ sudo cp tmp/deploy/images/varsomimx6q/var-image-x11-varsomimx6q.ubi /media/rootfs/opt/images
$ sudo umount /media/rootfs
$ sudo umount /media/BOT_varsomi

Flashing on target:

$ flash_eraseall /dev/mtd0
$ kobs-ng init -x /opt/images/u-boot.imx  --search_exponent=1 -v
$ nandwrite -p /dev/mtd0 -s 0x1e0000 /opt/images/imx6q-var-som.dtb 
$ flash_eraseall /dev/mtd2
$ nandwrite -p /dev/mtd2 /opt/images/uImage
$ flash_eraseall /dev/mtd3
$ ubiformat /dev/mtd3 -f /opt/images/var-image-x11-varsomimx6q.ubi -s 2048 -O 2048
uImage
u-boot.imx


7 Next steps

In sections 1-6 we explained how to build Yocto for VAR-SOM-MX6. We explained the results for nand (UBI) and for sd-card. At this point you should have a bootable sd-card with UBI images on it. You should be able to boot from the sd-card using the boot select button and flash the nand. Next steps:

  • Build and deploy the compiler and tools.
  • Fetch u-boot and compile it out of Yocto tools.
  • Fetch Linux kernel and compile it out of Yocto tools.

8 Toolchain

Build the toolchain by:

$ bitbake meta-ide-support
$ bitbake meta-toolchain

The output will be located at tmp/deploy/sdk/. On a 64 bit Ubuntu you will get:

poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.sh.

Install the tools by running:

$ tmp/deploy/sdk/poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh

The toolchain name depend on your build machine and may change.

9 Build U-Boot out of Yocto tree

Get sources:

$ cd ~/var-som-mx6-dora-v5
$ git clone git://github.com/varigit/uboot-imx
$ cd uboot-imx/
$ git checkout -b imx_v2013.04_3.10.17_1.0.0_beta_var1 remotes/origin/imx_v2013.04_3.10.17_1.0.0_beta_var1

Build u-boot:

$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi:$PATH
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- <Your config file from the table below>
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi-

Flash u-boot to the sd-card:

$ sudo dd if=u-boot.imx of=/dev/sdxxx bs=512 seek=2; sync

In case of UBI copy it to the sd-card:

$ sudo cp u-boot.imx /media/rootfs.opt/images

Un mount the sdcard.

$ sudo umount /dev/sdxxx
Comment:
Replace /dev/sdxxx with the actual device name. Use dmesq to find the right one.

9.1 Avilable u-boot configurations

Definition
Built for
vsmq_10m10g_sd_config
VAR-SOM-MXQ/D 1GHz CPU 1GB DDR,  boot from MMC
vsmq_12m20g_sd_config
VAR-SOM-MXQ/D 1.2GHz CPU 2GB DDR,  boot from MMC
vsmd_10m05g_sd_config
VAR-SOM-MXD 1GHz CPU 0.5GB DDR,  boot from MMC
vsmdl_10m10g_sd_config
VAR-SOM-MXDL, 1GHz CPU 1.0 GB DDR     boot from MMC
vsms_10m10g_sd_config
VAR-SOM-MXSolo, 1GHz CPU 0.5 or 1.0 GB DDR boot from MMC
vsmq_10m10g_nand_config
VAR-SOM-MXQ/D 1GHz CPU 1GB DDR,  boot from NAND
vsmq_12m20g_nand_config
VAR-SOM-MXQ/D 1.2GHz CPU 2GB DDR,  boot from NAND
vsmd_10m05g_nand_som
VAR-SOM-MXD 1GHz CPU 0.5GB DDR,  boot from NAND
vsmdl_10m10g_nand_config
VAR-SOM-MXDL,1GHz CPU 1.0 GB DDR     boot from NAND
vsms_10m10g_nand_config
VAR-SOM-MXSolo, 1GHz CPU 0.5 or 1.0 GB DDR boot from NAND

10 Build Linux out of Yocto tree

Get sources:

$ cd ~/var-som-mx6-dora-v5/
$ git clone git://github.com/varigit/linux-2.6-imx.git
$ cd linux-2.6-imx/
$ git checkout -b imx_3.10.17_1.0.0_ga_beta_var2 remotes/origin/imx_3.10.17_1.0.0_ga_beta_var2

Build the Linux kernel:

$ export PATH=/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin:/opt/poky/1.5.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi:$PATH
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- mrproper
$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx_v7_var_defconfig
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- uImage
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules
Build the device tree
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6dl-var-som.dtb
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som.dtb
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som-ldo.dtb
$ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6sl-var-som.dtb

Copy the uImage and device tree to the sd-card boot partition or to the opt/image in order to be flashed to the nand. Copy modules to the sd-card

$ sudo make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- modules_install INSTALL_MOD_PATH=/media/rootfs/

11 Useful Bitbake commands

Bitbake Cheat Sheet

Useful bitbake commands

i.MX Yocto Project: ltib versus bitbake