RN314, a linux kernel module to control lcd, leds and buttons of Netgear Readynas RN314.

I have installed a fresh new debian on my Netgear Ready RN314 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.

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 0x8086:0x3a18
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/rn314/leds/backup	Led of the backup button
/sys/devices/rn314/leds/power	Led of power button
/sys/devices/rn314/leds/disk1	Led of disk 1
/sys/devices/rn314/leds/disk2	Led of disk 2
/sys/devices/rn314/leds/disk3	Led of disk 3
/sys/devices/rn314/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/rn314/leds/backup
root@nas:~# cat /sys/devices/rn314/leds/backup
2
root@nas:~#

Lcd

Lcd panel is 16x2 characters.

File	Description
/sys/devices/rn314/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/rn314/buttons/backup_cmdline	Command will be executed when backup button is pressed
/sys/devices/rn314/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/rn314/buttons/backup_cmdline
root@nas:~# cat /sys/devices/rn314/buttons/backup_cmdline
logger "Button backup has been pressed"