Contents: [Dobrica Pavlinušić's random unstructured stuff]
• Dobrica Pavlinušić's random unstructured stuff (documentation) 
• Dobrica Pavlinušić's random unstructured stuff (reset modes) 
• Dobrica Pavlinušić's random unstructured stuff (vlan) 
• Dobrica Pavlinušić's random unstructured stuff (GPIO pinout) 
• Dobrica Pavlinušić's random unstructured stuff (PWM same on all pins) 
• Dobrica Pavlinušić's random unstructured stuff (Debian) 
• Dobrica Pavlinušić's random unstructured stuff (u‑boot problem) 
• Dobrica Pavlinušić's random unstructured stuff (rescue image) 
• Dobrica Pavlinušić's random unstructured stuff (update from shell) 

documentation
• https://www.turris.cz/doc/en/start 
reset modes
https://www.turris.cz/doc/en/howto/omnia_factory_reset 
Available reset modes:
1 LED: Standard (re)boot
 2 LEDs: Rollback to latest snapshot
 3 LEDs: Rollback to factory reset
 4 LEDs: Re‑flash router from flash drive
 5 LEDs or more: Boot to rescue shell
vlan
• https://www.turris.cz/doc/en/howto/vlan_settings_omnia 
GPIO pinout

PWM same on all pins
• https://forum.turris.cz/t/gpio‑documentation/2869/5 
Debian
• https://github.com/tmshlvck/omnia‑debian/wiki 
• https://wiki.debian.org/InstallingDebianOn/TurrisOmnia 
root@turris:/mnt/tmp# wget http://aule.elfove.cz/~brill/omnia-debian/omnia-medkit-20170330.tar.gz

# boot into rescue mode

root@(none):~# mount /dev/mmcblk0p1 /target/

root@(none):~# btrfs subvolume create /target/@debian

watchdog will timeout, but you will eventually have subvolume visible from u‑boot (which is not case if you just create subvolume from Turris OS
root@turris:/# btrfs sub create @debian
Create subvolume './@debian'

root@turris:/# cd /@debian
root@turris:/@debian# tar xf /mnt/tmp/omnia-medkit-20170330.tar.gz 
root@turris:/@debian# btrfs fi df .
System, single: total=32.00MiB, used=4.00KiB
Data+Metadata, single: total=3.68GiB, used=2.25GiB
GlobalReserve, single: total=48.00MiB, used=0.00B

root@turris:/@debian# vi etc/network/interfaces
auto br0
iface br0 inet static
        bridge_ports wlan0 eth0 eth2
        address 192.168.3.254
        netmask 255.255.255.0
        gateway 192.168.3.1
root@turris:~# echo b > /proc/sysrq-trigger
[54760.278340] sysrq: SysRq : Resetting
[54760.282039] CPU1: stopping
   
U-Boot SPL 2015.10-rc2 (Aug 18 2016 - 20:43:35)
High speed PHY - Version: 2.0
SERDES0 card detect: NONE
   
Initialize Turris board topology
Detected Device ID 6820
board SerDes lanes topology details:
 | Lane #  | Speed |  Type       |
 --------------------------------
 |   0    |  5   |  PCIe0       |
 |   1    |  5   |  USB3 HOST0  |
 |   2    |  5   |  PCIe1       |
 |   3    |  5   |  USB3 HOST1  |
 |   4    |  5   |  PCIe2       |
 |   5    |  0   |  SGMII2      |
 --------------------------------
poll_op_execute: TIMEOUT
PCIe, Idx 0: detected no link
PCIe, Idx 1: detected no link
PCIe, Idx 2: detected no link
High speed PHY - Ended Successfully
DDR3 Training Sequence - Ver TIP-1.29.0
Memory config in EEPROM: 0x01
DDR3 Training Sequence - Switching XBAR Window to FastPath Window
DDR3 Training Sequence - Ended Successfully

U-Boot 2015.10-rc2 (Aug 18 2016 - 20:43:35 +0200), Build: jenkins-omnia-master-23
   
SoC:   MV88F6820-A0
       Watchdog enabled
I2C:   ready
SPI:   ready
DRAM:  1 GiB (ECC not enabled)
Enabling Armada 385 watchdog.
Disabling MCU startup watchdog.
Regdomain set to **
MMC:   mv_sdh: 0
SF: Detected S25FL164K with page size 256 Bytes, erase size 64 KiB, total 8 MiB
*** Warning - bad CRC, using default environment
   
Model: Marvell Armada 385 GP
Board: Turris Omnia SN: 0000000B0000B8E5
Regdomain set to **
SCSI:  MVEBU SATA INIT
SATA link 0 timeout.
SATA link 1 timeout.
AHCI 0001.0000 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
flags: 64bit ncq led only pmp fbss pio slum part sxs
Net:   neta2
Hit any key to stop autoboot:  0
=> 

=> setenv debbootargs earlyprintk console=ttyS0,115200 rootfstype=btrfs rootwait root=/dev/mmcblk0p1 rootflags=subvol=@debian,commit=5 rw
=> setenv debboot 'setenv bootargs "$debbootargs cfg80211.freg=$regdomain"; btrload mmc 0 0x01000000 boot/vmlinuz @debian; btrload mmc 0 0x02000000 boot/dtb @debian; btrload mmc 0 0x03000000 boot/initrd.img @debian; bootz 0x01000000 0x03000000:$filesize 0x02000000'
=> saveenv
Saving Environment to SPI Flash...
SF: Detected S25FL164K with page size 256 Bytes, erase size 64 KiB, total 8 MiB
Erasing SPI flash...Writing to SPI flash...done

=> setenv defbootcmd "$bootcmd"
=> setenv debbootcmd 'i2c dev 1; i2c read 0x2a 0x9 1 0x00FFFFF0; setexpr.b rescue *0x00FFFFF0; if test $rescue -ge 2; then echo BOOT RESCUE; run rescueboot; else if test $rescue -ge 1; then echo BOOT eMMC TurrisOS FS; run mmcboot; else echo BOOT eMMC Debian FS; run debboot; fi; fi'
=> setenv bootcmd "$debbootcmd"
=> saveenv
Saving Environment to SPI Flash...
Erasing SPI flash...Writing to SPI flash...done

u‑boot problem
Kernel image @ 0x1000000 [ 0x000000 - 0x332588 ]
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid

https://docs.turris.cz/hw/omnia/serial‑boot/#u‑boot 
update u‑boot
=> dhcp
neta2:1 is connected to neta2.  Reconnecting to neta2
neta2 Waiting for PHY auto negotiation to complete............ done
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
*** Unhandled DHCP Option in OFFER/ACK: 208
*** Unhandled DHCP Option in OFFER/ACK: 208
DHCP client bound to address 192.168.4.113 (5583 ms)
*** Warning: no boot file name; using 'C0A80471.img'
Using neta2 device
TFTP from server 192.168.4.1; our IP address is 192.168.4.113
Filename 'C0A80471.img'.
Load address: 0x800000
Loading: *
TFTP error: 'file /var/tftp/C0A80471.img not found' (1)
Not retrying...
=> tftpboot 0x1000000 uboot-turris-omnia-spl.kwb
Using neta2 device
TFTP from server 192.168.4.1; our IP address is 192.168.4.113
Filename 'uboot-turris-omnia-spl.kwb'.
Load address: 0x1000000
Loading: #####################################
         2.6 MiB/s
done
Bytes transferred = 534240 (826e0 hex)
=> sf probe
SF: Detected S25FL164K with page size 256 Bytes, erase size 64 KiB, total 8 MiB
=> sf update 0x1000000 0 $filesize
device 0 offset 0x0, size 0x826e0
534240 bytes written, 0 bytes skipped in 10.563s, speed 51765 B/s

fix default variables and boot from mmc (I did 4 leds rescue before)
env default -a
saveenv
run mmcboot

rescue image
root@x230:/var/tftp# wget https://repo.turris.cz/hbs/omnia/packages/turrispackages/rescue-image_3.4-1_arm_cortex-a9_vfpv3-d16.ipk
root@x230:/var/tftp# mkdir tmp
root@x230:/var/tftp# cd tmp/
root@x230:/var/tftp/tmp# tar xvf ../rescue-image_3.4-1_arm_cortex-a9_vfpv3-d16.ipk
./debian-binary
./data.tar.gz
./control.tar.gz
root@x230:/var/tftp/tmp# tar xvf data.tar.gz
./
./usr/
./usr/share/
./usr/share/rescue-image/
./usr/share/rescue-image/image.fit
./usr/share/rescue-image/image.fit.lzma
root@x230:/var/tftp/tmp# cp usr/share/rescue-image/image.fit.lzma ../

now flash new rescue
=> tftpboot ${kernel_addr_r} image.fit.lzma
Using neta2 device
TFTP from server 192.168.4.1; our IP address is 192.168.4.113
Filename 'image.fit.lzma'.
Load address: 0x800000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ###########################
         2.4 MiB/s
done
Bytes transferred = 6115919 (5d524f hex)

=> sf probe
SF: Detected S25FL164K with page size 256 Bytes, erase size 64 KiB, total 8 MiB
=> sf update ${kernel_addr_r} 0x00100000 ${filesize}
device 0 offset 0x5d524f, size 0x22adb1
SPI flash failed in erase step

update from shell
opkg install u-boot-omnia
opkg install rescue-image

root@turris:~# nor-update -d
Verifying /dev/mtd0 against /usr/share/omnia/uboot-devel ...
a107291f748c9b3d9d96dd718e3e471a - /dev/mtd0
15b3b8e4100351677e85b983ef659921 - /usr/share/omnia/uboot-devel
Failed
Unlocking /dev/mtd0 ...
Erasing /dev/mtd0 ...

Writing from /usr/share/omnia/uboot-devel to /dev/mtd0 ...
Verifying /dev/mtd1 against /usr/share/rescue-image/image.fit.lzma ...
1ea91207d0fbd4479bb4c8b4a3957371 - /dev/mtd1
82194bc8fc95193cc3f3491a047b0c88 - /usr/share/rescue-image/image.fit.lzma
Failed
Unlocking /dev/mtd1 ...
Erasing /dev/mtd1 ...

Writing from /usr/share/rescue-image/image.fit.lzma to /dev/mtd1 ...

This will make route unbootable :‑(
Reflash router via usb https://docs.turris.cz/hw/omnia/rescue‑modes/#re‑flash‑router