You are viewing an old version of this page. View the current version.

Compare with Current View Page History

Version 1 Next »

NOTE: Wouter Cloetens from LGI shared links and information on taking serial connection and flashing OpenWRT image

Hardware Information

Wi-Fi Extender Reference Targets

Serial Port Access

https://doc.turris.cz/doc/en/troubleshooting/serial_link#turris_omnia

Do not connect Vcc!

Flashing

The Omnia ships with TurrisOS preinstalled. This is an OpenWrt fork with the older Linux 4.4 kernel. It uses btrfs to manage the eMMC flash.

We do not use it in this mode. The RDK-B port is closer to the mainline OpenWrt port, which uses Linux 4.14, and a traditional partition table.

Reflashing procedure from TurrisOS:

  • upgrade through a "medkit" image through the use of a USB stick and pressing the reset button.
  • https://openwrt.org/toh/turris_cz.nic/turris_cz.nic_omnia is not entirely accurate, and cannot complete without access to the serial port, due to an error in the factory initialisation of the U-boot environment. Updated procedure:
    • Remove the casing. Connect a TTL serial interface, see "Serial Port Access" above.
    • Format a USB flash drive as ext2.

    • Download openwrt-18.06.2-mvebu-cortexa9-turris-omnia-sysupgrade.img.gz and omnia-medkit-openwrt-18.06.2-mvebu-cortexa9-turris-omnia-initramfs.tar.gz from http://downloads.openwrt.org/releases/18.06.2/targets/mvebu/cortexa9/ and copy both files to the root of the flash drive.

    • Disconnect other USB devices from the Omnia and connect the flash drive to either USB port. (I have only verified this with the USB port at the front).

    • Hold down the reset button (backside, bottom centre) and plug in the power cord. Wait until the fourth LED lights up (green), then release (before the 5th LED lights up).

    • Wait approximately 2 minutes for the Turris Omnia to flash itself with the temporary image, during which LEDs will change multiple times.

    • Either use the serial console, or connect a computer to a LAN port (LAN0 to LAN4) of the Turris Omnia with a DHCP client.
      From a computer:

      ssh root@192.168.1.1

      Then, from the ssh session or a serial console:

      mount /dev/sda1 /mnt
      sysupgrade /mnt/openwrt-18.06.2-mvebu-cortexa9-turris-omnia-sysupgrade.img.gz

    • Wait another minute for the final OpenWrt image to be flashed. The Turris Omnia will reboot itself and you can remove the flash drive.

    • At this point, the boot loader (U-boot) will fail to boot the image:

      U-boot: CRC error in environment, using default environment.


      This is due to a forgotten step during manufacturing; the default U-boot environment was never written. Correct this with these U-boot commands:

      env default -a
      saveenv

    • Reboot the device. You are now running stock OpenWrt 18.06.2.
  • Wouter Cloetens to provide an updated medkit image that fixes the U-boot environment, removing the need to open the casing and connect a serial port.

The eMMC disk is now regularly partitioned.

root@OpenWrt:~# fdisk /dev/mmcblk0
 
Welcome to fdisk (util-linux 2.32).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
 
Command (m for help): p
Disk /dev/mmcblk0: 7.3 GiB, 7818182656 bytes, 15269888 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x15344058
 
Device         Boot Start    End Sectors   Size Id Type
/dev/mmcblk0p1 *     2048  35327   33280  16.3M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      36864 561663  524800 256.3M 83 Linux

Create a new partition for RDK-B.

The devicetree database and the Linux kernel are in the FAT32 partition:

root@OpenWrt:~# mount /dev/mmcblk0p1 /mnt
root@OpenWrt:~# ls -l /mnt
-rwxr-xr-x    1 root     root         17353 Aug 17  2018 armada-385-turris-omnia.dtb
-rwxr-xr-x    1 root     root       2445072 Aug 17  2018 zImage

Copy the kernel in the FAT32 partition.

Reconfigure U-boot to boot from your kernel and root partition.

It is strongly recommend to keep the OpenWrt partition and kernel. If boot fails, it is easy to change the U-boot environment and boot back into OpenWrt.

Flashing RDKB image(A Yocto Project based Distro)

Follow instruction from wiki page(https://wiki.rdkcentral.com/display/RDK/Wifi-Extender+Yocto+Build+Instructions) to make yocto's RDK-B image from yocto workspace in your PC.

Boot into openwrt based linux system in turris omnia board. Its downlink interface will have 192.168.1.1 IP address and have it connected to your PC.

Check whether 'fdisk' command is available in openwrt system. if it is not present, follow below steps to have 'fdisk' command.

root@OpenWrt:~# opkg update
root@OpenWrt:~# opkg install fdisk

Create one primary partition for zImage. Create another extended partition for holding logical partitions for rootfs and /nvram.

root@OpenWrt:/# fdisk /dev/mmcblk0
 
Welcome to fdisk (util-linux 2.28.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
 
 
Command (m for help): p
Disk /dev/mmcblk0: 7.3 GiB, 7818182656 bytes, 15269888 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x15488508
 
Device         Boot Start    End Sectors   Size Id Type
/dev/mmcblk0p1 *     2048  35327   33280  16.3M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      36864 561663  524800 256.3M 83 Linux
 
Command (m for help): n
Partition type
   p   primary (2 primary, 0 extended, 2 free)
   e   extended (container for logical partitions)
Select (default p):
 
Using default response p.
Partition number (3,4, default 3):
First sector (35328-15269887, default 563200):
Last sector, +sectors or +size{K,M,G,T,P} (563200-15269887, default 15269887): 596479
 
Created a new partition 3 of type 'Linux' and of size 16.3 MiB.
 
Command (m for help): n
Partition type
   p   primary (3 primary, 0 extended, 1 free)
   e   extended (container for logical partitions)
Select (default e):
 
Using default response e.
Selected partition 4
First sector (35328-15269887, default 598016):
Last sector, +sectors or +size{K,M,G,T,P} (598016-15269887, default 15269887):
 
Created a new partition 4 of type 'Extended' and of size 7 GiB.
 
Command (m for help): n
All primary partitions are in use.
Adding logical partition 5
First sector (600064-15269887, default 600064):
Last sector, +sectors or +size{K,M,G,T,P} (600064-15269887, default 15269887): 1124865
 
Created a new partition 5 of type 'Linux' and of size 256.3 MiB.
 
Command (m for help): n
All primary partitions are in use.
Adding logical partition 6
First sector (1126914-15269887, default 1128448):
Last sector, +sectors or +size{K,M,G,T,P} (1128448-15269887, default 15269887): 1259520
 
Created a new partition 6 of type 'Linux' and of size 64 MiB.
 
Command (m for help): p
Disk /dev/mmcblk0: 7.3 GiB, 7818182656 bytes, 15269888 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x15488508
 
Device         Boot   Start      End  Sectors   Size Id Type
/dev/mmcblk0p1 *       2048    35327    33280  16.3M  c W95 FAT32 (LBA)
/dev/mmcblk0p2        36864   561663   524800 256.3M 83 Linux
/dev/mmcblk0p3       563200   596479    33280  16.3M 83 Linux
/dev/mmcblk0p4       598016 15269887 14671872     7G  5 Extended
/dev/mmcblk0p5       600064  1124865   524802 256.3M 83 Linux
/dev/mmcblk0p6      1128448  1259520   131073    64M 83 Linux
 
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Resource busy
 
The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).
 
root@OpenWrt:/# reboot


After reboot, format /dev/mmcblk0p3, /dev/mmcblk0p5 and /dev/mmcblk0p6 as ext2 partitions.


root@OpenWrt:/# mkfs.ext2  /dev/mmcblk0p3
mke2fs 1.44.1 (24-Mar-2018)
/dev/mmcblk0p3 contains a ext2 file system
        last mounted on /mnt on Fri Aug  9 13:56:55 2019
Proceed anyway? (y,N) y
Discarding device blocks: done                           
Creating filesystem with 16640 1k blocks and 4176 inodes
Filesystem UUID: 1b53ea80-b120-4072-a87e-9e68092ed311
Superblock backups stored on blocks:
        8193
 
Allocating group tables: done                           
Writing inode tables: done                           
Writing superblocks and filesystem accounting information: done
 
root@OpenWrt:/# mkfs.ext2  /dev/mmcblk0p5
mke2fs 1.44.1 (24-Mar-2018)
/dev/mmcblk0p5 contains a ext2 file system
        last mounted on / on Fri Aug  9 13:57:53 2019
Proceed anyway? (y,N) y
Discarding device blocks: done                           
Creating filesystem with 262145 1k blocks and 65792 inodes
Filesystem UUID: 14219ea9-3584-4d61-adb4-8370dd73b5cc
Superblock backups stored on blocks:
        8193, 24577, 40961, 57345, 73729, 204801, 221185
 
Allocating group tables: done                           
Writing inode tables: done                           
Writing superblocks and filesystem accounting information: done
 
root@OpenWrt:/# mkfs.ext2  /dev/mmcblk0p6
mke2fs 1.44.1 (24-Mar-2018)
/dev/mmcblk0p6 contains a ext2 file system
        last mounted on /nvram on Fri Aug  9 13:59:29 2019
Proceed anyway? (y,N) y
Discarding device blocks: done                           
Creating filesystem with 65536 1k blocks and 16384 inodes
Filesystem UUID: df6ac518-0a1a-432a-a921-d6958307340a
Superblock backups stored on blocks:
        8193, 24577, 40961, 57345
 
Allocating group tables: done                           
Writing inode tables: done                           
Writing superblocks and filesystem accounting information: done

Copy zImage, dtb and a rootfs tar file from yocto workspace to turris omnia(whose IP is 192.168.1.1).
(in your PC)

$ scp <yocto_workspace>build-turris/tmp/deploy/images/turris/zImage root@192.168.1.1:/tmp
$ scp <yocto_workspace>build-turris/tmp/deploy/images/turris/zImage-armada-385-turris-omnia.dtb root@192.168.1.1:/tmp/armada-385-turris-omnia.dtb
$ scp <yocto_workspace>build-turris/tmp/deploy/images/turris/rdkb-generic-broadband-image_default_<image-timestamp>.rootfs.tar.gz root@192.168.1.1:/tmp/


(in turris omnia)

root@OpenWrt:~# mount /dev/mmcblk0p3 /mnt
root@OpenWrt:~# mv /tmp/zImage /mnt
root@OpenWrt:~# mv /tmp/armada-385-turris-omnia.dtb /mnt
root@OpenWrt:~# umount /mnt
root@OpenWrt:~# mount /dev/mmcblk0p5 /mnt
root@OpenWrt:~# tar -xzf /tmp/rdkb-generic-broadband-image_default_<image-timestamp>.rootfs.tar.gz -C /mnt
root@OpenWrt:~# umount /mnt
root@OpenWrt:~# reboot


Press enter while turris omnia reboots to get u-boot prompt. Then type following u-boot commands for booting yocto based RDKB image instead of openwrt image.

=> env set yocto_bootargs earlyprintk console=ttyS0,115200 root=/dev/mmcblk0p5 rootfstype=ext2 rw rootwait
=> env set yocto_mmcload setenv bootargs \"\$yocto_bootargs cfg80211.freg=\$regdomain\"\; ext2load mmc 0:3 0x01000000 zImage\; ext2load mmc 0:3 0x02000000 armada-385-turris-omnia.dtb
=> env set mmcboot run yocto_mmcload \|\| run openwrt_mmcload \|\| run factory_mmcload\; bootz 0x01000000 - 0x02000000
=> saveenv
=> reset


Now, Turris Omnia will boot with Yocto based RDKB image.

NOTE: To fallback to openwrt OS, enter following u-boot commands.

=> env set mmcboot run openwrt_mmcload \|\| run factory_mmcload\; bootz 0x01000000 - 0x02000000
=> saveenv
=> reset



  • No labels

DISCLAIMER: Please note that the use of the RDK Wiki is subject to its Privacy Policy & Terms of Use. In addition, this Wiki may be accessed by all RDK licensees and their contractors.