VAR-SOM-MX6 Ubuntu Flash From Net

VAR-SOM-MX6 - Ubuntu Linaro Alip-20151215 Flash your target from NET

Note:
Under construction!!! Under construction!!! Under construction!!!

Overview

Ubuntu Linaro Alip is pre built file system. For more information Ubuntu based Rootfs provided by Linaro. Variscite used linaro-vivid-alip-20151215-714 image added Vivante Graphic acceleration and compile the GStreamer with i.MX6 support.

Build Ubuntu Alip NFS is prerequisite step. Please make sure you run it and have a complete NFS build directory as described in the linked WIKI. Also make sure you target is booted from NFS.

The steps require to build an Bootable SDCARD:

1. Build Ubuntu Alip NFS.
2. Boot your Ubuntu Alip with TFTP and mount your file system over NFS.
3. Copy required file to your NFS directory
4. Format and partition the target eMMC
5. Install U-Boot and Linux Kernel images
6. Install the root file system
7. Deploy the kernel modules
8. Deploy the Wi-Fi modules and firmware

Format and partition the SCDARD

Use to find oout your SDCARD device.

$ dmesg 

change /dev/sdxxx with your real device in the following commands.
Delete the MBR on your SDCARD

$ cd ~/var-som-mx6-alip
$ sudo umount /dev/sdxxx*
$ sudo dd if=/dev/zero of=/dev/sdxxx bs=1K count=10
$ sync

Use fdisk to partition the SDCARD

$ sudo fdisk /dev/sdxxx
n
p
1
8192
24575
t
b
n
p
2
24576
<enter to select default last sector>
t
2
83
w
$ sync

Check:

$ sudo fdisk /dev/sdxxx
p
q
   Device Boot      Start         End      Blocks   Id  System
/dev/sde1            8192       24575        8192    b  W95 FAT32
/dev/sde2           24576     7862271     3918848   83  Linux

if you do "ls /dev/sdxxx*" you will get 2 /dev/sdxxx1 and /dev/sdxxx2. Use them in the following commands. Format:

$ mkfs.vfat /dev/sdxxx1 -nBOT-VARSOM
$ mkfs.ext4 /dev/sdxxx2 -Lrootfs
$ sync

Remove/Insert the SCDARD or just push the media icons to mount the new empty partitions.

Install U-Boot images

Note:
Make sure you built U-Boot for SD.

$ ~/var-som-mx6-alip/uboot-imx
$ sudo dd if=SPL of=/dev/sdxxx bs=1K seek=1; sync
$ sudo dd if=u-boot.img of=/dev/sdxxx bs=1K seek=69; sync

Copy the kernel image and device tree files

$ cd ~/var-som-mx6-alip/linux-2.6-imx
$ sudo cp arch/arm/boot/uImage /media/BOT-VARSOM/
$ sudo cp arch/arm/boot/dts/*var*.dtb /media/BOT-VARSOM/

Install the root file system

$ sudo tar xvf ~/Downloads/linaro-alip-20151215-v1.tar.bz2 -C /media/rootfs

Deploy the kernel modules

$ cd ~/var-som-mx6-alip/linux-2.6-imx
$ sudo make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules_install INSTALL_MOD_PATH=/media/rootfs/

Deploy the Wi-Fi modules and firmware

$ cd ~/var-som-mx6-alip/build-utilites
$ gedit setup-env
set:
export ROOTFS=/media/rootfs

$ ./sudo_build_wl18xx.sh modules
$ ./sudo_build_wl18xx.sh firmware
$ ./sudo_build_wl18xx.sh bt-firmware
$ sudo umount /dev/sdxxx*