rndu4000, a linux kernel module to control lcd, leds and buttons of Netgear Readynas Ultra 4.

I have installed a fresh new debian on my Netgear Ready Nas Ultra 4 and the lcd panel keep lighting so i decided to rewrite the kernel module to control lcd, buttons and leds. Before you try it, i STRONGLY encourage you to unmount your raid. It work well on my nas, but well we never know.

Please note that i have nothing to do with Netgear.

This module have been reported working on others netgear readynas models, take a look at others nas section. Please notify me by opening an issue if you have runned it on other device than the rndu4000 and wanted to add it to the list.

Contents

1. Requirements
2. Build
3. Leds
4. Buttons
5. Lcd
6. Others nas

Requirements

Check your nas

root@nas:~# dmidecode --type 1
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
    Manufacturer: NETGEAR
    Product Name: ReadyNAS
    Version: 05/19/2010 ReadyNAS-NVX-V2 V1.8
    Serial Number:
    Wake-up Type: Power Switch
    SKU Number:
    Family

root@nas:~# lspci -d 0x8086:0x2918
00:1f.0 ISA bridge: Intel Corporation 82801IB (ICH9) LPC Interface Controller (rev 02)

root@nas:~# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 28
model name      : Intel(R) Atom(TM) CPU D410   @ 1.66GHz

Build

meson setup build
cd build
meson compile

or

cd src
make

Leds

Each led can be constrolled by the following sysfs files :

File	Description
/sys/devices/rndu4000/leds/backup	Led of the backup button
/sys/devices/rndu4000/leds/power	Led of power button
/sys/devices/rndu4000/leds/disk1	Led of disk 1
/sys/devices/rndu4000/leds/disk2	Led of disk 2
/sys/devices/rndu4000/leds/disk3	Led of disk 3
/sys/devices/rndu4000/leds/disk4	Led of disk 4

Acceptable values are :

Leds values

Value	Description
0	off
1	on
2	blink

Example

root@nas:~# echo 2 > /sys/devices/rndu4000/leds/backup
root@nas:~# cat /sys/devices/rndu4000/leds/backup
2

Lcd

Lcd panel is 16x2 characters.

File	Description
/sys/devices/rndu4000/lcd/backlight	Enable/Disable Backlight of lcd panel
/dev/lcd	Character device to write text on lcd

Escape commands

Command	Description
\e[2J	Clear the screen, return to home
\e[H	Set cursor position to 0,0
\e[LC	Set cursor visible
\e[Lc	Set cursor invisible
\e[LB	Enable cursor blink
\e[Lb	Disable cursor blink
\e[L+	Enable backlight
\e[L-	Disable backlight
\e[LD	Enable display
\e[Ld	Disable display

Example

root@nas:~# echo -en '\e[2JHello World !' > /dev/lcd

Buttons

Buttons can be configured to launch command

File	Description
/sys/devices/rndu4000/buttons/backup_cmdline	Command will be executed when backup button is pressed
/sys/devices/rndu4000/buttons/reset_cmdline	Command will be executed when reset button is pressed

Example

root@nas:~# echo -n 'logger "Button backup has been pressed"' > /sys/devices/rndu4000/buttons/backup_cmdline
root@nas:~# cat /sys/devices/rndu4000/buttons/backup_cmdline
logger "Button backup has been pressed"

Others nas

This module have been reported working on some others models of Netgear nas. Since i don't own them, i can't garanty the module will work.

Model	Url	Comment	Thanks to
RN314	https://github.com/psyrykh/readynas-rn314	Set LPC_DEVICE_ID to 0x3a18 in src/config.h	Pavel Syrykh