NSLU2

http://www.andreabeggi.net/wp-content/53006-nslu2.jpg

Intro

• XScale processor from Intel (ARM) at 266MHz (133MHz before hacking...)
• 32Mb SDRAM
• 8Mb Flash
• 2 USB 2.0 ports

Links

• Description on wikipedia
• OpenSlug

Todo

• Mine came with
  • Server Name: LKG63472F
  • Version: V2.3RA5
• Connect USB printer?
• Install backuppc -> I tried but slug is really too slow for that :-(
• Connect Tuxdroid dongle

Debian

• Debian/NSLU2
• How to install Debian on NSLU2

Installation

To install, follow the howto, here are the big steps:

• Get Debian 4.0r0 firmware from http://www.slug-firmware.net/ and unzip it
• Power the NSLU2 and wait a bit (green light) before plugging it to the network if you've a DHCP, so the NSLU2 will choose itself IP 192.168.1.77, otherwise look to your DHCP server logs to find the IP attribution
• Go to the admin webpage, tab administration, login admin/admin
• Configure ALL network params if you don't have DHCP
• Go to the admin webpage, tab administration, login admin/admin, tab advanced, tab upgrade
• Upload di-nslu2.bin, start upgrade
• Wait for "upgrading ok" (5mins) -> wait for 3 bips (5-10mins)
• This is the last moment to plug an external USB mass-storage if you didn't do so yet
• Login via ssh installer@192.168.1.77 (or another IP got by DHCP...) pwd "install"
  • I did it from an xterm but exported term mode is pure console so it's better to login from a real text console otherwise the ncurses menu is a bit broken (but still usable)
• Start installation, manually load the following modules:
  • ext3-modules-2.6.18-4-ixp4xx-di
  • partman-auto
  • partman-ext3
  • scsi-core-modules-2.6.18-4-ixp4xx-di
  • usb-storage-modules-2.6.18-4-ixp4xx-di
• Whatever system you choose to partition your disk, be sure to have at least 128M of swap, I've set up 512M on my 400G drive.
• In total it took about 100 mins to complete
• If you need a console, start a second ssh connection and choose to obtain a shell
• On tasksel, I chose absolutely nothing, I prefer to take only what I need later

After first reboot

• dpkg --get-selections|wc -l

142

• du -hs /

179M

• dmesg:

Linux version 2.6.18-4-ixp4xx (Debian 2.6.18.dfsg.1-12) (waldi@debian.org) (gcc versi
on 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 Tue Mar 27 18:01:56 BST 2007
CPU: XScale-IXP42x Family [690541f1] revision 1 (ARMv5TE), cr=0000397f
Machine: Linksys NSLU2
Memory policy: ECC disabled, Data cache writeback
On node 0 totalpages: 8192
  DMA zone: 8192 pages, LIFO batch:1
CPU0: D VIVT undefined 5 cache
CPU0: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
CPU0: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
Built 1 zonelists.  Total pages: 8192
Kernel command line: console=ttyS0,115200 rtc-x1205.probe=0,0x6f noirqdebug
IRQ lockup detection disabled
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
Memory: 32MB = 32MB total
Memory: 25780KB available (1948K code, 496K data, 92K init)

Calibrating delay loop... 132.71 BogoMIPS (lpj=663552)
...

• hdparm -tT /dev/sda

/dev/sda:
Timing cached reads:    86 MB in  2.04 seconds =  42.20 MB/sec
Timing buffered disk reads:   28 MB in  3.12 seconds =   8.98 MB/sec

Tweaks

• Ok so our NSLU2 is well underclocked, let's restore its full speed following this howto

Calibrating delay loop... 266.24 BogoMIPS (lpj=1331200)

Much better :-)

/dev/sda:
Timing cached reads:    90 MB in  2.00 seconds =  44.98 MB/sec
Timing buffered disk reads:   32 MB in  3.03 seconds =  10.56 MB/sec

A bit better but nothing fantastic...

• Setup static network parameters
  • apt-get install resolvconf
  • edit /etc/network/interfaces

allow-hotplug eth0
iface eth0 inet static
   address 192.168.1.77
   netmask 255.255.255.0
   gateway 192.168.1.1
   dns-nameservers 192.168.1.2 192.168.1.1

• From /usr/share/doc/nslu2-utils/README.Debian:
  • sed -i 's/^FSCKFIX=.*$/FSCKFIX=yes/' /etc/default/rcS
  • sed -i 's/^BOOTLOGD_ENABLE=.*$/BOOTLOGD_ENABLE=yes/' /etc/default/bootlogd
  • Reorder the booting sequence to get ssh up earlier:

ls -l /etc/rcS.d/
S21resolvconf -> ../init.d/resolvconf
S22ifupdown -> ../init.d/ifupdown
S23networking -> ../init.d/networking
S23ssh -> ../init.d/ssh

• • By default the power button restarts the slug, change the call to shutdown in /etc/inittab:

ca:12345:ctrlaltdel:/sbin/shutdown -h now

Devel

Be prepared to do some native compilation...

• apt-get install build-essential

Tuxdroid

Basics

• apt-get install subversion libusb-dev libglib2.0-dev ipython
• mkdir /home/tuxdroid; cd /home/tuxdroid
• svn co http://svn.tuxisalive.com tuxdroid-svn
• cd tuxdroid-svn/daemon/trunk
• make
• mkdir -p /opt/tuxdroid/api
• ln -s /home/tuxdroid/tuxdroid-svn/software /opt/tuxdroid/api/python
• mkdir -p /opt/tuxdroid/bin
• ln -s /home/tuxdroid/tuxdroid-svn/daemon/trunk/tuxdaemon /opt/tuxdroid/bin
• ln -s /opt/tuxdroid/bin/tuxdaemon /usr/local/bin/tuxdaemon
• echo -e "#/bin/bash\npython -i /opt/tuxdroid/api/python/tux.py" > /opt/tuxdroid/bin/tuxsh
• chmod 755 /opt/tuxdroid/bin/tuxsh
• ln -s /opt/tuxdroid/bin/tuxsh /usr/local/bin/tuxsh

Flashing tools

• cd /home/tuxdroid
• cd tuxdroid-svn/firmware/tuxup/trunk/
• make
• ln -s /home/tuxdroid/tuxdroid-svn/firmware/tuxup/trunk/tuxup /opt/tuxdroid/bin
• ln -s /opt/tuxdroid/bin/tuxup /usr/local/bin/tuxup
• wget http://belnet.dl.sourceforge.net/sourceforge/dfu-programmer/dfu-programmer-0.4.0.tar.gz
• tar xzf dfu-programmer-0.4.0.tar.gz
• cd dfu-programmer-0.4.0
• ./configure
• make
• ln -s /home/tuxdroid/dfu-programmer-0.4.0/src/dfu-programmer /usr/local/bin
• apt-get install gcc-avr avr-libc gdb-avr libsvn-dev
• wget http://svnwcrev.tigris.org/files/documents/3444/29110/svnwcrev-0.1.tar.gz
• tar -xzf svnwcrev-0.1.tar.gz
• cd svnwcrev-0.1
• sed 's/apr-0/apr-1.0/' config_mk.template > config.mk
• make
• ln -s /home/tuxdroid/svnwcrev-0.1/svnwcrev /usr/local/bin/

Audio

• apt-get install alsa-utils mpg321
• cat /proc/asound/cards

0 [Droid          ]: USB-Audio - Tux Droid
                     Kysoh Tux Droid at usb-0000:00:01.0-1, full speed

• with a more recent firmware you get:

0 [default        ]: USB-Audio - TUX RF DONGLE
                     C2ME BELGIUM TUX RF DONGLE  at usb-0000:00:01.0-1, full speed

For oss layer:

• modprobe snd_pcm_oss
• modprobe snd_mixer_oss

Webradio

Status

• compiling tuxdaemon OK
• running tuxdaemon FAIL
  • USB part seems ok (displays tux events properly) but not TCP part, seems not to be listening on port
• compiling tuxup OK
• compiling dfu-programmer OK
• compiling svncrev OK
• compiling tuxcore tuxaudio OK
• flashing tuxcore.hex tuxcore.eep tuxaudio.hex tuxaudio.eep OK
• sound PARTLY
  • ALSA and OSS-emulation layers are up
  • the sound is quite hashed and lot of "alsa underrun" msgs, slightly better results through oss than alsa
  • recording at 8000 Hz mono is very poor (played on host)
  • playing at 8000 Hz mono is poor (recorded on host)
  • madplay -b8 -R8000 ...mp3 is correct

Misc

Boot diagnostics

From /usr/share/doc/nslu2-utils/README.Debian but in case of problems I prefer to have the text here :-)

Some of the led states during boot include:
- Cycling down all the leds from top to bottom: The APEX boot loader.
- Amber status led: Initramfs is running, mounting root filesystem.
- Disk 1 on, status slowly switching between amber and green: Root
  filesystem mounted, system booting.
- Disk 1 on, status green, with fast double amber flashes: System is booted
  and running. The frequency of the amber flashes indicates the system's
  one minute load average; faster flashes denote higher load.
- Disk 1 on, status quickly flashing between black/green and black/amber.
  Single user mode. Again the flash interval denotes load.
- Disk 1 on, status slowly switching beteween amber and red: Shutdown in
  progress.

tests

apt-get install locales
apache2-mpm-prefork - Traditional model for Apache HTTPD 2.1
apache2-mpm-worker - High speed threaded model for Apache HTTPD 2.1