Andre Heider [Sun, 17 Jan 2021 07:38:53 +0000 (08:38 +0100)]
arm-trusted-firmware-mvebu: bump espressobin boards to CPU_1000_DDR_800
The cpufreq issue has been identified and a fix is in the process of beeing
upstreamed [0].
Bump the boards to the default 1000MHz so they can run at that frequency
once the fix is merged. Until then the boards are stuck at 800MHz (just
claiming to run 1000Hz, which is a lie).
The thermal zones kernel documentation is misleading, we cannot use more
than one sensor in a thermal zone node.
Furthermore the drivetemp driver for some reason it only catches one
sensor from the hard drives array (the first available).
In the Buffalo Linkstation LS421DE board there is also a sensor at the
ethernet phy chip that can also be monitored. Very useful to stop the fan
when there are no hard drives in the bays.
(It might be also possible to add the CPU sensor, but it requires kernel
patching for registering the sensor via device tree, using the function:
devm_thermal_zone_of_sensor_register)
Fix the thermal zones to use only one sensor per node and add the ethernet
phy sensor. Also adjust the hdd temperatures to be more conservative for
a mechanical hard drive.
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Brian Norris [Sat, 23 Jan 2021 23:08:00 +0000 (15:08 -0800)]
base-files: mount pstore if present
Pstore (persistent store) can be used to stash debug information (kernel
console, panics, ftrace) across reboots or crashes. If the filesystem is
present, mount it.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
INAGAKI Hiroshi [Fri, 11 Dec 2020 14:14:03 +0000 (23:14 +0900)]
build: add elecom-product-header for ELECOM devices
A header used in ELECOM WRC-300GHBK2-I and WRC-1750GHBK2-I/C is also
used in ELECOM WRC-2533GHBK-I, so split the code to generate the header
and move it to image-commands.mk to use from ramips target.
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com> Reviewed-by: Sungbo Eo <mans0n@gorani.run>
Calling netdev_reset_queue() from _stop() functions is causing sporadic kernel
panics on bcm63xx, which happen mainly on BCM6318 and BCM6328.
This reverts to the previous behaviour, which called netdev_reset_queue() from
_open() functions.
Marty Jones [Mon, 25 Jan 2021 17:37:56 +0000 (12:37 -0500)]
rockchip: fix SUPPORTED_DEVICES for Radxa ROCK Pi 4
This sets SUPPORTED_DEVICES to match the compatible in the DTS.
While at it, synchronize the capitalization in DEVICE_MODEL and
DTS model.
Signed-off-by: Marty Jones <mj8263788@gmail.com>
[commit title/message facelift, move variable in armv8.mk] Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
On a platform with many very different devices, like found on kirkwood,
the generic profile seems like a remnant of the past that does not
have a real use anymore.
Remove it to have one thing less to maintain.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Paul Spooren <mail@aparcar.org>
On a platform with many very different devices, like found on ipq806x,
the generic profile seems like a remnant of the past that does not
have a real use anymore.
Remove it to have one thing less to maintain.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Paul Spooren <mail@aparcar.org>
On a platform with many very different devices, like found on ipq40xx,
the generic profile seems like a remnant of the past that does not
have a real use anymore.
Remove it to have one thing less to maintain.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Paul Spooren <mail@aparcar.org>
On a platform with many very different devices, like found on ramips,
the generic profiles seem like remnants of the past that do not
have a real use anymore.
Remove them to have one thing less to maintain.
Actually, rt288x didn't have a default profile in the first place.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Paul Spooren <mail@aparcar.org>
On a platform with many very different devices, like found on ath79,
the generic profiles seem like remnants of the past that do not
have a real use anymore.
Remove them to have one thing less to maintain.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Paul Spooren <mail@aparcar.org>
Felix Fietkau [Wed, 27 Jan 2021 19:54:34 +0000 (20:54 +0100)]
mt76: update to the latest version
65abbcd9f6fb mt76: usb: process URBs with status EPROTO properly 3199ef5fa35e mt76: mt7615: set mcu country code in mt7615_mcu_set_channel_domain() 5c86d5bb079b mt76: mt7915: Remove unneeded semicolon 3f546330b59d mt76: mt7915: support TxBF for DBDC 032ad7e02545 mt76: mt7615: unify init work cc3f23d1e654 mt76: mt7915: bring up the WA event rx queue for band1 fa3d334a0e22 mt76: fix crash on tearing down ext phy c4c9c402d14a mt76: mt7915: fix vif sta index for DBDC eca2f0ec0d4c mt76: mt7915: fix command id for txbf action c828124ef9a5 mt76: mt7915: add support for using a secondary PCIe link for gen1 dbaf0f4679f3 mt76: mt7915: make vif index per adapter instead of per band fb3e5ce1eb00 mt76: move vif_mask back from mt76_phy to mt76_dev be2bea66d6e3 mt76: mt7915: detect wrong nss eeprom parameter on dbdc cards 8dc5d4a0da7c Revert "mt76: mt7915: fix vif sta index for DBDC" 8c796a33781c mt76: mt7915: only set int1 when using the second hif 4eb5caaf6cc1 mt76: reduce q->lock hold time 0714890bf0fd mt76: mt7615: reduce VHT maximum MPDU length 2f85aa5cbc62 mt76: mt7915: avoid writes to MT_PCIE_RECOG_ID when not using gen1 devices 8696919d9aae mt76: dma: fix a possible memory leak in mt76_add_fragment()
Paul Spooren [Wed, 27 Jan 2021 03:16:36 +0000 (17:16 -1000)]
rules: fix COMMITCOUNT logic
The newly added $(COMMITCOUNT) variable was wrongly increased by plus
one. The addition should have been only added to $(AUTORELEASE) as
OpenWrt traditionally starts counting at one rather than zero.
$(AUTORELEASE) counts the commits since the last bump, which is zero on
the version bump commit itself.
This commit increases $(AUTORELEASE) by one while leaving $(COMMITCOUNT)
as is.
The base-files package is the only package using $(COMMITCOUNT) so far
and requires a pseudo commit to keep the PKG_RELEASE correct. A non
functional change (Copyright bump) is done in the next commit.
Jeffrey Elms [Wed, 27 Jan 2021 02:28:14 +0000 (18:28 -0800)]
px5g-wolfssl: Fix certificate signature
Certificate signature algorithm was being set after call to
`wc_MakeCert`, resulting in a mismatch between specified signature in
certificate and the actual signature type.
Signed-off-by: Jeffrey Elms <jeff@wolfssl.com>
[fix commit subject, use COMMITCOUNT] Signed-off-by: Paul Spooren <mail@aparcar.org>
Rosen Penev [Thu, 21 Jan 2021 04:51:45 +0000 (20:51 -0800)]
toolchain/libstdcpp: disable dual ABI and default to new
GCC 5.1 changed the std::string ABI in order to properly support C++11.
For compatibility with libraries compiled with the older ABI, that is,
linking between old-abi.so and new-abi.bin, both ABIs are enabled. In
terms of OpenWrt, all packages are compiled with the same toolchain,
which means these issues do not need to be handled.
Most importantly, this results in a significant size reduction of
libstdpp:
Birger Koblitz [Thu, 21 Jan 2021 14:16:24 +0000 (15:16 +0100)]
realtek: add API for the hw tables of RTL83XX/93XX SoCs
Add a table API that has per accss register locking and uses
register description information to handle all table access
through a single set of api calls.
Birger Koblitz [Thu, 21 Jan 2021 13:29:52 +0000 (14:29 +0100)]
realtek: add QoS and rate control
This adds support for identifying QoS information in packets
and use this and rate control information to submit to multiple
egress queues. The ethernet driver is also made to support
2 egress and up to 32 egress queues.
Birger Koblitz [Thu, 21 Jan 2021 20:38:27 +0000 (21:38 +0100)]
realtek: add support for the RTL9300 timer
this adds support for the SoC timer of the RTL9300 chips, it
provides 6 independent timer/counters, of which the first one
is used as a clocksource and the second one as event timer.
Birger Koblitz [Thu, 21 Jan 2021 13:11:35 +0000 (14:11 +0100)]
realtek: add support for the RTL8390 and RTL9300 SoC IRQs
This adds support for the RTL8390 and RTL9300 SoCs
it also cleans up unnecessary definitions in mach-rtl83xx.h
and moves definitions relevant for irq routing to irq.h
Append a device specific version trailer used by the stock
firmware upgrade application to validate firmwares.
The trailer contains a list of ZyXEL firmware version
numbers, which includes a four letter hardware identifier.
The stock web UI requires that the current hardware matches
one of the listed versions, and that the version number is
larger than a model specific minimum value. The minimum
version varies between V1.00 and V2.60 for the currently
known GS1900 models. The number is not used anywhere else
to our knowlege, and has no direct relation to the version
info in the u-image header. We can therefore use an
arbitrary value larger than V2.60.
The stock firmware upgrade application will only load and
flash the part of the file specified in the u-image header,
regardless of file size. It can therefore not be used to
flash images with an appended rootfs. There is therefore no
need to include the trailer in other images than the
initramfs. This prevents accidentally bricking by attempts
to flash other images from the stock web UI.
Stock images support all models in the series, listing
all of them in the version trailer. OpenWrt provide model
specific images. We therefore only list the single supported
hardware identifier for each image. This eliminates the risk
of flashing the wrong OpenWrt image from stock web UI.
OpenWrt can be installed from stock firmware in two steps:
1) flash OpenWrt initramfs image from stock web gui
2) boot OpenWrt and sysupgrade to a squasfs image
The OpenWrt squashfs image depends on a static partition
map in the DTS. It can only be installed to the "firmware"
partition. This partition is labeled "RUNTIME1" in u-boot
and in stock firmware, and is referred to as "image 0" in
the stock flash management tool. The OpenWrt initramfs
can be installed and run from either partitions. But if
you want to keep stock irmware in the spare system partition,
then you must make sure stock firmware is installed to the
"RUNTIME2" partition referred to as "image 1" in the stock
web UI. And the initial OpenWrt initramfs must be flashed
to "RUNTIME1"/"image 0".
The stock flash management application supports direct
selection of both which partition to flash and which
partition to boot next. This allows software controlled
"dual-boot" between OpenWrt and stock firmware, without
using console access to u-boot. u-boot use the "bootpartition"
variable stored in the second u-boot environment to select
which of the two system partitions to boot. This variable
is set by the stock flash management application, by direct
user input. It can also be set in OpenWrt using e.g
fw_setsys bootpartition 1
to select "RUNTIME2"/"image 1" as default, assuming a
stock firmware version is installed in that partition.
Bjørn Mork [Sat, 23 Jan 2021 10:08:11 +0000 (11:08 +0100)]
realtek: use vendor-specific magic for ZyXEL
The stock firmware of the ZyXEL GS1900 series use a non-standard
u-image magic. This is not enforced by the stock u-boot, which is
why we could boot images with the default magic. The flash
management application of the stock firmware will however verify
the magic, and refuse any image with another value.
Convert to vendor-specific value to get flash management support
in stock firmware, including the ability to upgrade to OpenWrt
directly from stock web UI.
dnsmasq v2.83 has a bug in handling duplicate queries which means it may
try to reply using the incorrect network socket. This is especially
noticeable in dual stack environments where replies may be mis-directed to
IPv4 addresses on an IPv6 socket or IPv6 addresses on an IPv4 socket.
This results in system log spam such as:
dnsmasq[16020]: failed to send packet: Network unreachable
dnsmasq[16020]: failed to send packet: Address family not supported by protocol
dnsmasq v2.84test3 resolves these issues.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
x86 uses append-metadata, but only for signing and not for the
metadata itself.
Since recently SUPPORTED_DEVICES was assigned with a global value
and is not empty anymore, append-metadata will now actually put
metadata into x86 images. This breaks sysupgrade on x86.
To fix it for the moment, let's just empty SUPPORTED_DEVICES for
this target again.
In the long term, one should either not add metadata to the images
if it is not desired, and/or remove the unintended fwtool check.
Fixes: f52081bcf938 ("treewide: provide global default for SUPPORTED_DEVICES") Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
MAC addresses are labeled as ETH, 2.4G, and 5GHz
Only one Vendor MAC address in flash
eth0 ETH *:a2 art 0x0
phy1 2.4G *:a3 ---
phy0 5GHz *:a4 ---
**Serial Access:**
the RX line on the board for UART is shorted to ground by resistor R176
therefore it must be removed to use the console
but it is not necessary to remove to view boot log
optionally, R175 can be replaced with a solder bridge short
the resistors R175 and R176 are next to the UART RX pin at J10
**Installation:**
2 ways to flash factory.bin from OEM:
Method 1: Firmware upgrade page:
OEM webpage at 192.168.1.1
username and password "admin"
Navigate to "Firmware Upgrade" page from left pane
Click Browse and select the factory.bin image
Upload and verify checksum
Click Continue to confirm and wait 3 minutes
Method 2: Serial to load Failsafe webpage:
After connecting to serial console and rebooting...
Interrupt uboot with any key pressed rapidly
execute `run failsafe_boot` OR `bootm 0x9fd70000`
wait a minute
connect to ethernet and navigate to
"192.168.1.1/index.htm"
Select the factory.bin image and upload
wait about 3 minutes
**Return to OEM:**
If you have a serial cable, see Serial Failsafe instructions
otherwise, uboot-env can be used to make uboot load the failsafe image
*DISCLAIMER*
The Failsafe image is unique to Engenius boards.
If the failsafe image is missing or damaged this will brick the device
DO NOT downgrade to ar71xx this way, it can cause kernel loop or halt
ssh into openwrt and run
`fw_setenv rootfs_checksum 0`
reboot, wait 3 minutes
connect to ethernet and navigate to 192.168.1.1/index.htm
select OEM firmware image from Engenius and click upgrade
**TFTP recovery:**
Requires serial console, reset button does nothing
rename initramfs to 'vmlinux-art-ramdisk'
make available on TFTP server at 192.168.1.101
power board, interrupt boot
execute tftpboot and bootm 0x81000000
NOTE: TFTP is not reliable due to bugged bootloader
set MTU to 600 and try many times
**Format of OEM firmware image:**
The OEM software of EAP1200H is a heavily modified version
of Openwrt Kamikaze. One of the many modifications
is to the sysupgrade program. Image verification is performed
simply by the successful ungzip and untar of the supplied file
and name check and header verification of the resulting contents.
To form a factory.bin that is accepted by OEM Openwrt build,
the kernel and rootfs must have specific names...
and begin with the respective headers (uImage, squashfs).
Then the files must be tarballed and gzipped.
The resulting binary is actually a tar.gz file in disguise.
This can be verified by using binwalk on the OEM firmware images,
ungzipping then untaring.
Newer EnGenius software requires more checks but their script
includes a way to skip them, otherwise the tar must include
a text file with the version and md5sums in a deprecated format.
The OEM upgrade script is at /etc/fwupgrade.sh.
OKLI kernel loader is required because the OEM software
expects the kernel to be no greater than 1536k
and the factory.bin upgrade procedure would otherwise
overwrite part of the kernel when writing rootfs.
Note on PLL-data cells:
The default PLL register values will not work
because of the external AR8035 switch between
the SOC and the ethernet port.
For QCA955x series, the PLL registers for eth0 and eth1
can be see in the DTSI as 0x28 and 0x48 respectively.
Therefore the PLL registers can be read from uboot
for each link speed after attempting tftpboot
or another network action using that link speed
with `md 0x18050028 1` and `md 0x18050048 1`.
The clock delay required for RGMII can be applied
at the PHY side, using the at803x driver `phy-mode`.
Therefore the PLL registers for GMAC0
do not need the bits for delay on the MAC side.
This is possible due to fixes in at803x driver
since Linux 5.1 and 5.3
treewide: provide global default for SUPPORTED_DEVICES
The majority of our targets provide a default value for the variable
SUPPORTED_DEVICES, which is used in images to check against the
compatible on a running device:
SUPPORTED_DEVICES := $(subst _,$(comma),$(1))
At the moment, this is implemented in the Device/Default block of
the individual targets or even subtargets. However, since we
standardized device names and compatible in the recent past, almost
all targets are following the same scheme now:
The equal redundant definitions are a symptom of this process.
Consequently, this patch moves the definition to image.mk making it
a global default. For the few targets not using the scheme above,
SUPPORTED_DEVICES will be defined to a different value in
Device/Default anyway, overwriting the default. In other words:
This change is supposed to be cosmetic.
This can be used as a global measure to get the current compatible
with: $(firstword $(SUPPORTED_DEVICES))
(Though this is not precisely an achievement of this commit.)
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Paul Spooren [Sat, 2 Jan 2021 00:18:32 +0000 (14:18 -1000)]
base-files: use $(COMMITCOUNT) in PKG_RELEASE
The newly added `$(COMMITCOUNT)` varialbe allows automatic versioning
based on the number of Git commits of a package. Replace *tedious to
bump* and *merge conflict causing* `PKG_RELEASE` and replace it with
`$(COMMITCOUNT)`.
Paul Spooren [Sat, 2 Jan 2021 00:02:12 +0000 (14:02 -1000)]
rules: add AUTORELEASE and COMMITCOUNT variables
The lack of bumped PKG_RELEASE variables is a recurring theme on the
mailing list and in GitHub comments. This costs precious review time,
a rare good within the OpenWrt project.
Instead of relying on a manually set PKG_RELEASE this commit adds a
`commitcount` function that uses the number of Git commits to determine
the release. The function is called via the variables `$(AUTORELEASE)`
or `$(COMMITCOUNT)`. The `PKG_RELEASE` variable can be set to either of
the two.
- $(AUTORELEASE):
Release is automagically set to the number of commits since the last
commit containing either ": update to " or ": bump to ".
Bjørn Mork [Wed, 20 Jan 2021 17:36:52 +0000 (18:36 +0100)]
kernel: mtdsplit_uimage: add "openwrt, offset" and "openwrt, partition-magic"
Some devices prepend a standard U-Boot Image with a vendor specific
header, having its own magic. Adding two new properties will support
validation of such images, including the additional magic.
The only difference between the "openwrt,okli" and the generic
parser is the magic. Set this in device tree for all affected
devices and remove the "openwrt,okli" parser.
Tested-by: Michael Pratt <mcpratt@protonmail.com> # EAP300 v2, ENS202EXT and ENH202 Signed-off-by: Bjørn Mork <bjorn@mork.no>
Rafał Miłecki [Wed, 20 Jan 2021 15:49:26 +0000 (16:49 +0100)]
kernel: add parser finding rootfs after CFE bootfs
It's required for BCM4908. It cannot use "bcm-wfi-fw" parser because
that one requires *two* JFFS2 partitions which is untested / unsupported
on the BCM4908 architecture. With a single JFFS2 partition "bcm-wfi-fw"
parser will:
1. Fail to find "vmlinux.lz" as it doesn't follow "1-openwrt" file
2. Create partitions that don't precisely match bootfs layout
The new parser is described in details in the MTD_SPLIT_CFE_BOOTFS
symbol help message.
Rafał Miłecki [Thu, 21 Jan 2021 12:04:45 +0000 (13:04 +0100)]
firmware-utils: bcm4908asus: tool inserting Asus tail into BCM4908 image
Asus looks for an extra data at the end of BCM4908 image, right before
the BCM4908 tail. It needs to be properly filled to make Asus accept
firmware image.
This tool constructs such a tail, writes it and updates CRC32 in BCM4908
tail accordingly.
Sync ethernet driver code with upstream Linux kernel:
-Reduce xmit_more code changes.
-Combine rx cleanup code into a function.
-Convert to build_skb.
-Improve rx loop by optimizing loop tracking.
https://lore.kernel.org/netdev/20210106144208.1935-1-liew.s.piaw@gmail.com/ Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
[Amend commit description, move patches to the top since they are going to be
upstreamed] Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Hamming ECC devices do not cover OOB data, as opposed to BCH ECC devices.
Therefore, disabling ECC for all devices is preventing BCH devices from
correctly reading and writing the OOB data.
UART Serial
[o] TX
[o] GND
[o] RX
[ ] VCC - Do not connect it
MAC addresses as verified by OEM firmware:
use address source
LAN *:c2 factory 0xe000 (label)
WAN *:c3 factory 0xe006
2g *:c4 factory 0x0000
5g *:c5 factory 0x8000
Flashing instructions:
1.Create a simple http server (nginx etc)
2.set uart enable
To enable writing to the console, you must reset to factory settings
Then you see uboot boot, press the keyboard 4 button (enter uboot command line)
If it is not successful, repeat the above operation of restoring the factory settings.
After entering the uboot command line, type:
setenv uart_en 1
saveenv
boot
3.use shell in uart
cd /tmp
wget http://"your_computer_ip:80"/openwrt-ramips-mt7621-xiaomi_mir4-squashfs-kernel1.bin
wget http://"your_computer_ip:80"/openwrt-ramips-mt7621-xiaomi_mir4-squashfs-rootfs0.bin
mtd write openwrt-ramips-mt7621-xiaomi_mir4-squashfs-kernel1.bin kernel1
mtd write openwrt-ramips-mt7621-xiaomi_mir4-squashfs-rootfs0.bin rootfs0
nvram set flag_try_sys1_failed=1
nvram commit
reboot
4.login to the router http://192.168.1.1/
Installation via Software exploit
Find the instructions in the https://github.com/acecilia/OpenWRTInvasion
Signed-off-by: Dmytro Oz <sequentiality@gmail.com>
[commit message facelift, rebase onto shared DTSI/common device
definition, bump uboot-envtools] Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Robert Marko [Thu, 21 Jan 2021 12:08:57 +0000 (13:08 +0100)]
ipq40xx: fix boards being shown twice
Since generic images have been split to their own
Makefile boards are showing up twice in menuconfig
as $(eval $(call BuildImage)) was not dropped from
the new generic.mk.
Hence $(eval $(call BuildImage)) was being called
twice.
So, lets simply drop it from generic.mk.
Fixes: 378c7ff28210 ("ipq40xx: split generic images into own file") Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Rafał Miłecki [Thu, 21 Jan 2021 08:14:20 +0000 (09:14 +0100)]
bcm4908: set console in the CONFIG_CMDLINE
procd doesn't work with just serial specified in the DT (using chosen &
stdout-path). It requires tty device to be explicitly specified in the
cmdline.
Sven Eckelmann [Mon, 23 Nov 2020 12:41:34 +0000 (13:41 +0100)]
ath79: Add support for OpenMesh MR1750 v2
Device specifications:
======================
* Qualcomm/Atheros QCA9558 ver 1 rev 0
* 720/600/240 MHz (CPU/DDR/AHB)
* 128 MB of RAM
* 16 MB of SPI NOR flash
- 2x 7 MB available; but one of the 7 MB regions is the recovery image
* 3T3R 2.4 GHz Wi-Fi (11n)
* 3T3R 5 GHz Wi-Fi (11ac)
* 6x GPIO-LEDs (2x wifi, 2x status, 1x lan, 1x power)
* 1x GPIO-button (reset)
* external h/w watchdog (enabled by default))
* TTL pins are on board (arrow points to VCC, then follows: GND, TX, RX)
* 1x ethernet
- AR8035 ethernet PHY (RGMII)
- 10/100/1000 Mbps Ethernet
- 802.3af POE
- used as LAN interface
* 12-24V 1A DC
* internal antennas
Flashing instructions:
======================
Various methods can be used to install the actual image on the flash.
Two easy ones are:
ap51-flash
----------
The tool ap51-flash (https://github.com/ap51-flash/ap51-flash) should be
used to transfer the image to the u-boot when the device boots up.
initramfs from TFTP
-------------------
The serial console must be used to access the u-boot shell during bootup.
It can then be used to first boot up the initramfs image from a TFTP server
(here with the IP 192.168.1.21):
projects / thirdparty / openwrt.git / log
