The blue LED is what other firmwares use for this device, and it's a lot
easier on the eyes than its shade of yellow, which implies an error
condition.
Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
[merge into existing $boardname:blue:status block]
Signed-off-by: Mathias Kresin <dev@kresin.me>
Acked-by: Piotr Dymacz <pepe2k@gmail.com>
Acked-by: Cezary Jackiewicz <cezary@eko.one.pl>
TP-Link Archer C20 v4 is a router with 5-port FE switch and
non-detachable antennas. It's based on MediaTek MT7628N+MT7610EN.
Specification:
- MediaTek MT7628N/N (580 Mhz)
- 64 MB of RAM
- 8 MB of FLASH
- 2T2R 2.4 GHz and 1T1R 5 GHz
- 5x 10/100 Mbps Ethernet
- 3x external, non-detachable antennas
- UART (J1) header on PCB (115200 8n1)
- 7x LED (GPIO-controlled*), 2x button, power input switch
* WAN LED in this devices is a dual-color, dual-leads type which isn't
(fully) supported by gpio-leds driver. This type of LED requires both
GPIOs state change at the same time to select color or turn it off.
For now, we support/use only the green part of the LED.
* MT7610EN ac chip isn't not supported by LEDE. Therefore 5Ghz won't
work.
Flash instruction:
The only way to flash LEDE image in ArcherC20v4 is to use
tftp recovery mode in U-Boot:
1. Configure PC with static IP 192.168.0.66/24 and tftp server.
2. Rename "openwrt-ramips-mt7628-ArcherC20v4-squashfs-tftp-recovery.bin"
to "tp_recovery.bin" and place it in tftp server directory.
3. Connect PC with one of LAN ports, press the reset button, power up
the router and keep button pressed for around 6-7 seconds, until
device starts downloading the file.
4. Router will download file from server, write it to flash and reboot.
Signed-off-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>
This changes device name from "TP-Link Archer C20" to "TP-Link Archer C20 v1"
because of TPLINK released new TP-Link Archer C20 v4. Additionally
migration to the generic board detection has been made.
Signed-off-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>
As long as we can't enforce image metadata, we need to use (platform)
image checks to have at least soem kind of validation.
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
ALFA Network AC1200RM is an AC1200 router, with 5-port FE switch and
USB 2.0 port. Device is based on MediaTek MT7620A + MT7612EN.
Specification:
- MT7620A (580 MHz)
- 64 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 5x 10/100 Mbps Ethernet with passive PoE output in WAN and LAN4
- 2T2R 2.4 GHz (MT7620A)
- 2T2R 5 GHz (MT7612EN)
- 1x USB 2.0
- 9x LED (8 driven by GPIO)
- 1x button (reset)
- DC jack for main power input (12-24 V)
- 2x UART, I2C, I2S and LED headers
Flash instruction (do it under U-Boot, using UART and TFTP server):
Select option "2: Load system code then write to Flash via TFTP" and
use "sysupgrade" image.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
There are 3 ethernet ports on Y1. LAN1 on port1, LAN2 on port0 and WAN on
port4.
Use a standalone switch configuration to match this and use the switch
trigger so that LAN LED could indicate the connetction status for both
lan ports correctly.
This patch also drop the internet led configuration, because there is a
WAN led for port4 and eth0.2 isn't always used as WAN.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Use a more appropriate compatible string. Fix the wireless led GPIO and
add the default wireless trigger. Use the wireless LED for boot state
indication as well.
Remove the GPIO pinmux for pins not exposed on the board.
Signed-off-by: Mathias Kresin <dev@kresin.me>
TP-Link TL-MR3420 v5 are simple N300 router with
5-port FE switch and non-detachable antennas.
Its very similar to TP-Link TL-WR841N V13.
Specification:
- MT7628N/N (580 MHz)
- 64 MB of RAM (DDR2)
- 8 MB of FLASH
- 2T2R 2.4 GHz
- 5x 10/100 Mbps Ethernet
- 2x external, non-detachable antennas
- USB 2.0 Port
- UART (J1) header on PCB (115200 8n1)
- 8x LED, 2x button, power input switch
Flash instruction:
The only way to flash LEDE image in mr3420v5 is to use
tftp recovery mode in U-Boot:
1. Configure PC with static IP 192.168.0.225/24 and tftp server.
2. Rename "lede-ramips-mt7628-tplink_tl-mr3420-v5-squashfs-tftp-recovery.bin"
to "tp_recovery.bin" and place it in tftp server directory.
3. Connect PC with one of LAN ports, press the reset button, power up
the router and keep button pressed for around 6-7 seconds, until
device starts downloading the file.
4. Router will download file from server, write it to flash and reboot.
Signed-off-by: Henryk Heisig <hyniu@o2.pl>
Move common tplink image build code into own recipe. Include the common
parts instead of including a full build recipe and overwriting former set
varaibles.
Signed-off-by: Mathias Kresin <dev@kresin.me>
"PandoraBox" is not the name of the manufacturer, it's a firmware made by
the manufacturer actually. Their official English name is "D-Team".
PBR-M1 is the only one they use "PandoraBox" as a brand name. Their other
products are using "Newifi" as their trademark (including Y1 and Y1S which
used to be OEM products for Lenovo).
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Signed-off-by: Mathias Kresin <dev@kresin.me>
Previously Newifi D2 could only use PandoraBox M1's firmware.
It works fine, but LED GPIO is different.
As a result, a separated DTS file for this device should be implemented.
Hardware spec:
* CPU: MTK MT7621A
* RAM: 512MB
* ROM: 32MB SPI Flash
* WiFi: MTK MT7603+MT7612
* Button: 2 buttons (reset, wps)
* LED: 3 single-color LEDs (USB, WiFi 2.4GHz, WiFi 5GHz) &
2 dual-color LEDs (Power, Internet)
* Ethernet: 5 ports, 4 LAN + 1 WAN
Installation method:
Same as Newifi D1, users may need to request unlock code from the device
manufacturer. Otherwise, a SPI flash programmer may be necessary to get
the firmware flashed. After the device is unlocked, press and hold reset
button before power cable plugs in. Then go to http://192.168.1.1 to
upload and flash the firmware package.
Signed-off-by: Jackson Ming Hu <huming2207@gmail.com>
The VAR11N-300 is a tiny wireless-N device with a hardwired Ethernet
cable, one extra Ethernet port, and an internal antenna, based on the
MediaTek MT7620n chipset.
Specs:
- MT7620n WiSoC @ 600MHz
- 32 MB SDRAM
- 4 MB SPI flash
- 2T2R 2.4GHz WiFi-N
- 1 attached 10/100 Ethernet cable (LAN)
- 1 10/100 Ethernet port (WAN)
- 1 attached USB / barrel 5vdc power cable
- 5 LEDs (see notes below)
- 1 reset button
- 1 UART (3 pads on board)
Installation:
The stock firmware does not support uploading new firmware directly,
only checking the manufacturer's site for updates. This process may be
possible to spoof, but the update check uses some kind of homebrew
encryption that I didn't investigate. Instead, you can install via a
backdoor:
1. Set up a TFTP server to serve the firmware binary
(lede-ramips-mt7620-var11n-300-squashfs-sysupgrade.bin)
2. Factory reset the device by holding the reset button for a few
seconds.
3. Open the web interface (default IP: 192.168.253.254)
4. Log in with the "super admin" credentials: username `vonets`,
password `vonets26642519`.
5. On the "Operative Status" page, click the text "System Uptime", then
quickly click the uptime value.
6. If successful, an alert dialog will appear reading "Ated start", and
the device will now accept telnet connections. If the alert does not
appear, repeat step 5 until it works (the timing is a bit tricky).
7. Telnet to the device using credentials "admin / admin"
8. Retrieve the firmware binary from the tftp server: `tftp -l lede.bin
-r lede-ramips-mt7620-var11n-300-squashfs-sysupgrade.bin -g
<tftp-server-ip>`
9. Write the firmware to flash: `mtd_write write lede.bin /dev/mtd4`
10. Reboot
Tested:
- LAN / WAN ethernet
- WiFi
- LAN / WAN / status LED GPIOs (see notes below)
- Reset button
- Sysupgrade
Notes:
LEDs:
The board has 5 LEDs - two green LEDs for LAN / WAN activity, one blue
LED for WiFi, and a pair of "status" LEDs connected to the same GPIO
(the blue LED lights when the GPIO is low, and the green when it's
high). I was unable to determine how to operate the WiFi LED, as it
does not appear to be controlled by a GPIO directly.
Recovery:
The default U-boot installation will only boot from flash due to a
missing environment block. I generated a valid 4KB env block using
U-boot's `fw_setenv` tool and wrote it to flash at 0x30000 using an
external programmer. After this, it was possible to enter the U-boot
commandline interface and download a new image via TFTP (`tftpboot
81b00000 <image-filename>`), but while I could boot this image
sucessfully (`bootm`), writing it to flash (`cp.linux`) just corrupted
the flash chip. The sysupgrade file can be written to flash at 0x50000
using an external programmer.
Signed-off-by: Andrew Crawley <acrawley@gmail.com>
Add a helper variable which contains the boardname separated from the
vendor name. It allows to switch to a device tree compatible string
based boardname, by keeping the $board:colour:function syntax in
scripts handling/adding config for LEDs.
Boards not using the device tree compatible string as based boardname
are unaffected by the change, since none of them uses a comma in the
boardname.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Use <manufacturer>_<modelname> as image name for board using the
devicetree compat string as boardname.
Replace the underline of the device define, to keep the SUPPORTED_DEVICES
in sync with a devicetree compat string based boardname.
Override the default SUPPORTED_DEVICES for board which are having an
userspace boardname with an underline.
Signed-off-by: Mathias Kresin <dev@kresin.me>
The LinkIt Smart 7688/LinkIt Smart 7688 Duo are identical beside the
extra ATmega32U4 - accessible via UART - on the the Duo.
Since all relevant hardware is identical, drop the Duo special handling
in userspace.
Signed-off-by: Mathias Kresin <dev@kresin.me>
If we need to set the initial output value to GPIOF_OUT_INIT_HIGH (1) to
enable something, the pin is ACTIVE_HIGH. The same applies to
GPIOF_OUT_INIT_LOW (0) and ACTIVE_LOW.
Signed-off-by: Mathias Kresin <dev@kresin.me>
This will avoid some conflicts when doing a git rebase or merge,
specially when adding support to a new device.
Signed-off-by: Luis Araneda <luaraneda@gmail.com>
[drop brcm47xx changes which rename the images]
Signed-off-by: Mathias Kresin <dev@kresin.me>
This is a variant of the MT7620N-based Asus routers.
Specifications:
- MT7620N (580 MHz)
- 32 MB RAM
- 8 MB Flash
- 5x 10/100Mbps Ethernet (built-in switch)
- 2.4 GHz WLAN
- 2x external, non-detachable antennas
- UART (J2) header on PCB (115200 8n1)
Flash instructions:
1. Configure PC with static IP 192.168.1.75/24
2. Connect PC with one of LAN ports, press the reset button, power up
the router and keep button pressed for around 6-7 seconds. All 4 LEDs will
start to blink, which is when the router will accept firmware files via TFTP.
No known limitations on firmware filenames, just send it with a TFTP client
to 192.168.1.1.
3. Router will download file from server, write it to flash and reboot.
Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
This commit adds missing the GPIO key used as reset button.
Nexx WT1520 has a GPIO key for factory reset, but it's not defined in
WT1520.dtsi and cannot use it.
Drop the UART (full) from the device tree source file, it was never
used for this board. Adjust the kernel bootargs accordingly.
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
[add note about dropped UART (full) to the commit message]
Signed-off-by: Mathias Kresin <dev@kresin.me>
Add pinmuxes defined by some board which are including the dtsi files
to the dtsi files itself. Allows to reduce duplication.
Signed-off-by: Mathias Kresin <dev@kresin.me>
According to the datasheet the REFCLK pin is shared with GPIO#37 and
the PERST pin is shared with GPIO#36.
While at it fix a typo inside the pinmux setup code. The function is called
refclk and not reclk.
Update device tree source files accordingly.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Add kmod-sound-core, it is a dependency of kmod-sound-mt7620 and will
not be autoselected.
Remove kmod-i2c-core, it will be autoselected by kmod-i2c-ralink.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Setting the pins of the UARTF group to GPIO+I2S at the time the I2C
driver loads is to late for the wps GPIO button.
The gpio-keys driver fails to load since the pin used by the wps button
is not yet set to GPIO. The wps button with the rfkill keycode is
essential for this wireless only board.
Add the missing sound and I2C kernel modules corresponding to the
device nodes.
Signed-off-by: Mathias Kresin <dev@kresin.me>
This is a variant of the ZBT WG3526 with a few minor modifications.
The wifi chips are swapped, and there is no GPIO controllable status
LED. There is also no SATA port.
Specifications:
- MT7621AT (880 MHz)
- 512 MB RAM
- 16 MB Flash (SPI NOR)
- 5x 1Gbps Ethernet (built-in switch)
- MT7612E 802.11ac 5 GHz WLAN
- MT7603E 802.11n 2.4 GHz WLAN
Signed-off-by: Felix Fietkau <nbd@nbd.name>
UniElec U7628-01 is a router platform board based on MediaTek MT7628AN.
The device has the following specifications:
- MT7628AN (580MHz)
- 64/128/256 MB of RAM (DDR2)
- 8/16 MB of flash (SPI NOR)
- 5x 10/100 Mbps Ethernet (MT7628 built-in switch)
- 1x 2T2R 2.4 GHz Wi-Fi (MT7628)
- 1x miniPCIe slot (with PCIe and USB 2.0 buses)
- 1x miniSIM slot
- 1x microSD slot
- 1x USB 2.0 port
- 7x single-color LEDs (GPIO-controlled)
- 1x bi-color LED (green GPIO-controlled, red -> LED_WLAN# in miniPCIe)
- 1x reset button
- 1x UART header (4-pins)
- 1x SDXC/GPIO header (10-pins, connected with microSD slot)
- 1x DC jack for main power (12 V)
The following has been tested and is working:
- Ethernet switch
- miniPCIe slot (tested with modem and Wi-Fi card)
- miniSIM slot
- sysupgrade
- reset button
- USB 2.0 port*
Due to a missing driver (MMC over GPIO) this is not supported:
- microSD card reader
* Warning:
USB buses in miniPCIe and regular A-type socket are connected together,
without any proper analog switch or USB HUB.
Installation:
This board might come with a different firmware versions (MediaTek SDK,
PandoraBox, Padavan, etc.). If your board comes with PandoraBox, you can
install LEDE using sysupgrade. Just SSH to the router and perform forced
sysupgrade (due to a board name mismatch). The default IP of this board
should be: 192.168.1.1 and username/password: root/admin. In case of a
different firmware, you can use web based recovery described below.
Use the following command to perform the sysupgrade (for the 128MB
RAM/16MB flash version):
sysupgrade -n -F lede-ramips-mt76x8-u7628-01-128M-16M-squashfs-sysupgrade.bin
Recovery:
This board contains a Chinese, closed-source bootloader called Breed
(Boot and Recovery Environment for Embedded Devices). Breed supports web
recovery and to enter it, you keep the reset button pressed for around
5 seconds during boot. Your machine will be assigned an IP through DHCP
and the router will use IP address 192.168.1.1. The recovery website is
in Chinese, but is easy to use. Click on the second item in the list to
access the recovery page, then the second item on the next page is where
you select the firmware. In order to start the recovery, you click the
button at the bottom.
SDXC/GPIO header (J3):
1. SDXC_D3 / I2C_SCLK
2. SDXC_D2 / I2C_SD
3. SDXC_D1 / I2S_DI
4. SDXC_D0 / I2S_WS
5. SDXC_CMD / I2S_CLK
6. SDXC_CLK / GPIO0
7. SDXC_CD / UART_RXD1
8. UART_TXD1
9. 3V3
10. GND
Other notes:
1. The board is available with different amounts of RAM and flash. We
have only added support for the 128/16 MB configuration, as that seems
to be the default. However, all the required infrastructure is in place
for making support for the other configurations easy.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
UniElec U7621-06 is a router platform board based on MediaTek MT7621AT.
The device has the following specifications:
- MT7621AT (880 MHz)
- 256/512 MB of RAM (DDR3)
- 8/16/32/64 MB of FLASH (SPI NOR)
- 5x 1 Gbps Ethernet (MT7621 built-in switch)
- 1x ASMedia ASM1061 (for mSATA and SATA)
- 2x miniPCIe slots (PCIe bus only)
- 1x mSATA slot (with USB 2.0 bus for modem)
- 1x SATA
- 1x miniSIM slot
- 1x microSD slot
- 1x USB 3.0
- 12x LEDs (3 GPIO-controlled)
- 1x reset button
- 1x UART header (4-pins)
- 1x GPIO header (30-pins)
- 1x FPC connector for LEDs (20-pin, 0.5 mm pitch)
- 1x DC jack for main power (12 V)
The following has been tested and is working:
- Ethernet switch
- miniPCIe slots (tested with Wi-Fi cards)
- mSATA slot (tested with modem and mSATA drive)
- miniSIM slot
- sysupgrade
- reset button
- microSD slot
Installation:
This board might come with a different firmware versions (MediaTek SDK,
PandoraBox, Padavan, etc.). If your board comes with PandoraBox, you can
install LEDE using sysupgrade. Just SSH to the router and perform forced
sysupgrade (due to a board name mismatch). The default IP of this board
should be: 192.168.1.1 and username/password: root/admin. In case of a
different firmware, you can use web based recovery described below.
Use the following command to perform the sysupgrade (for the 256MB
RAM/16MB flash version):
sysupgrade -n -F lede-ramips-mt7621-u7621-06-256M-16M-squashfs-sysupgrade.bin
Recovery:
This board contains a Chinese, closed-source bootloader called Breed
(Boot and Recovery Environment for Embedded Devices). Breed supports web
recovery and to enter it, you keep the reset button pressed for around
5 seconds during boot. Your machine will be assigned an IP through DHCP
and the router will use IP address 192.168.1.1. The recovery website is
in Chinese, but is easy to use. Click on the second item in the list to
access the recovery page, then the second item on the next page is where
you select the firmware. In order to start the recovery, you click the
button at the bottom.
LEDs list (top row, left to right):
- LED_WWAN# (connected with pin 42 in LTE/mSATA slot)
- Power (connected directly to 3V3)
- CTS2_N (GPIO10, configured as "status" LED)
- TXD2 (GPIO11, configured as "led4", without default trigger)
- RXD2 (GPIO12, configured as "led5", without default trigger)
- LED_WLAN# (connected with pin 44 in wifi0 slot)
LEDs list (bottom row, left to right):
- ESW_P0_LED_0
- ESW_P1_LED_0
- ESW_P2_LED_0
- ESW_P3_LED_0
- ESW_P4_LED_0
- LED_WLAN# (connected with pin 44 in wifi1 slot)
Other notes:
1. The board is available with different amounts of RAM and flash. We
have only added support for the 256/16 MB configuration, as that seems
to be the default. However, all the required infrastructure is in place
for making support for the other configurations easy.
2. The manufacturer offers five different wireless cards with MediaTek
chipsets, based on MT76x2, MT7603 and MT7615. Images of the board all
show that the miniPCIe slots are dedicated to specific Wi-Fi cards.
However, the slots are generic.
3. All boards we got access to had the same EEPROM content. The default
firmware reads the Ethernet MAC from offset 0xe000 in factory partition.
This offset only contains 0xffs, so a random MAC will be generated on
every boot of the router. There is a valid MAC stored at offset 0xe006
and this MAC is shown as the WAN MAC in the bootloader. However, it is
the same on all boards we have checked. Based on information provided
by the vendor, all boards sold in small quantities are considered more
as samples for development purposes.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
TP-Link TL-WR840N v5 is simple N300 router with 5-port FE switch and
non-detachable antennas, based on MediaTek MT7628NN (aka MT7628N) WiSoC.
Specification:
- MT7628N/N (580 MHz)
- 64 MB of RAM (DDR2)
- 4 MB of FLASH
- 2T2R 2.4 GHz
- 5x 10/100 Mbps Ethernet
- 2x external, non-detachable antennas
- UART (J1) header on PCB (115200 8n1)
- 1x LED (GPIO-controlled), 1x button
* LED in TL-WR840N v5 is a dual-color, dual-leads type which isn't
(fully) supported by gpio-leds driver. This type of LED requires both
GPIOs state change at the same time to select color or turn it off.
For now, we support/use only the green part of the LED.
Orange LED is registered so you can later use it for your own purposes.
Flash instruction:
Unlike TL-WR840N v4 flashing through WEB UI works in v5.
1. Download lede-ramips-mt76x8-tl-wr840n-v5-squashfs-sysupgrade.bin image.
2. Go to 192.168.0.1
3. Flash the sysupgrade image through Firmware upgrade section of WEB UI.
4. Wait until green LED stops flashing and use the router.
Notes:
TFTP recovery is broken since TP-Link reused bootloader code for v4 and
that does not take into account only 4 MB of flash and bricks the device.
So do not use TFTP Recovery or you will have to rewrite SPI flash.
They fixed it in later GPL code,but it is unknown which version of
bootloader you have.
After manually compiling and flashing bootloader from GPL sources TFTP
recovery works properly.
Signed-off-by: Robert Marko <robimarko@gmail.com>
Some targets need 4K sectors for small flash chips (e.g. some
routerboards, where the entire chip is just one "erase block"), whereas
on other devices 4K sectors lead to horrible flash erase/write
performance.
Set the default limit in the generic kernel configuration to 4 MiB to
ensure that all new platforms don't use 4K sectors for bigger flash
chips. On all existing targets use 16 MiB for now to avoid regressions.
They will be changed individually in follow-up commits.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
On some devices the flash chip needs to be in 3-byte addressing mode during
reboot, otherwise the boot loader will fail to start.
This mode however does not allow regular reads/writes onto the upper 16M
half. W25Q256 has separate read commands for reading from >16M, however
it does not have any separate write commands.
This patch changes the code to leave the chip in 3-byte mode most of the
time and only switch during erase/write cycles that go to >16M
addresses.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Remove the ephy-pins from the ethernet device tree node. The ephy-pins
are useed to controll the ePHY LEDs and this board doesn't have these.
Instead one of the ePHY pins is used in GPIO mode to control the WAN
LED.
Use the switch LED trigger to control the WAN LED. Move the power LED
handling to diag.sh to show the boot status via this LED.
Add the missing kernel packages for USB and microSD card reader to the
default package selection.
Fix the maximum image size value. The board has a 32MByte flash chip.
Fixes: FS#1055
Signed-off-by: Edmunt Pienkowsky <roed@onet.eu>
[make the commit message more verbose, remove GPIO pinmux for pins not
used as GPIOs]
Signed-off-by: Mathias Kresin <dev@kresin.me>
Remove reference to pinmux group "wdt rst" on EW1200, ZBT-WG2626 and
ZBT-WG3526 devices. "wdt rst" is a pinmux function and not a pinmux
group.
Fixes the following error message during boot:
rt2880-pinmux pinctrl: invalid group "wdt rst" for function "gpio"
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
That device does not have a USB port. It as the same board as the
WT3020-8M, but without soldered USB port port. Also the case lacks the
opening for the port.
Reported-by: Alberto Bursi <alberto.bursi@outlook.it>
Signed-off-by: Mathias Kresin <dev@kresin.me>
the nexx wt3020-8M has a usb 2.0 port,
add usb 2.0 support packages to its default package list.
Signed-off-by: Alberto Bursi <alberto.bursi@outlook.it>
