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2.1. Drivers and Modules

For your webcam to work you will need support for the connection and support for the actual camera hardware. Those who are already versed in kernels and modules and how to load them should skip to Section 2.2, which addresses support of the connection type. If you know your USB, IEEE 1394 or whatever bus you will be connecting your camera to is already configured and working, you should move on to the list of specific webcam hardware listed in Section 2.3.

Webcam drivers are usually available one of three ways: within the kernel, as a compilable stand alone module, or available as a pre-compiled (packaged) binary driver from your Linux distribution.

2.1.1. Module or In-Kernel?

As a rule, often the stock kernel, or working part of the operating system, of your initial installation may already have support for what you need. Your Linux distribution vendor has likely enabled the most common options already, including the bus, or connection type, and drivers for common camera models. The driver exists either as a loadable module or within the already running kernel.

An easy way to tell if the driver is enabled is to use the dmesg command piped into less (for easy paging) to look for an acknowledgement that it was loaded when your system started up:

...which may yield something like the following, depending on your hardware:

If you don't see it, the particular driver may exist as a loadable module. If you know what that module is named, try using find; in this example we are looking for the 'ibmcam' module:

Note that up until the 2.4 series modules had the suffix .o; for 2.6+ series kernels this was replaced with .ko.

You can get a list of all modules available by typing the following at the command line:

Where `uname -r`, surrounded by forward tick marks, is your kernel version number.The following output is an example of what you might find in a USBwebcam-ready kernel , where everything is loaded as a module (allbut the relevant lines have been edited for brevity):

Once you know which module your camera needs you can find out if it is already loaded by typing the following at the command line:

As shown by the prompt above, you will need to have root privilegesto do this.You should get output similar to the following:

Most stock kernels are compiled with kmod, which enabling automatic loading of necessary modules when the appropriate hardware is detected. It may not always do so, however, so if you don't have the particular module you're seeking loaded andyou think the module may be available, try loadingit manually with modprobe, as in the following using the ibmcam module as an example:

Drivers for specific webcam models, or links to project pages hosting code for drivers, are outlined in Section 2.3. The drivers are usually available one of three ways: within the kernel, as a compilable stand alone module, or available as a pre-compiled binary from your Linux distribution.

If the support for your driver is not found either enabled statically within the kernel or as a module, don't despair. Drivers for numerous models are in the Linux kernel source (available directly from kernel.org source code repository), or in code offered separately from the kernel that can be configured to work with your current setup as oulined in Section 2.1.2. If your webcam driver is available in the kernel source but not enabled as a module or otherwise in your default system, you can either recompile the kernel from the source code you have or obtain a new version of the kernel source, either pre-packaged by your Linux distributor or directly from the previous link (as a so-called 'vanilla' kernel).If you are unfamiliar with the prerequisites and procedure of compiling your own kernel, I direct you to the Kernel HOWTOfor more information.

2.1.2. Patching, Source-Only or Precompiled Binary?

You may find that your webcam is supported by only a kernel patch, by a source-only driver not requiring a kernel recompile, or you may even be lucky enough to have a distribution that makes a pre-compiled and packaged binary driver available for your computer's architecture. The procedure involved in the former is largely beyond the scope of this document and is probably best outlined in the documentation available on the web page of your particular model's driver found in Section 2.3. Some further more general documentation on these processes are, however, addressed in Section 5

2.2. Supporting the Connection Type2.2.1. USB Webcams

If you have a USB webcam, it is likely a Linux driver has been written for your device.There are two ways of supporting USB devices in Linux.One is the more traditional kernel support, and the other is throughlibusb.For at least one webcam category, the STV0680-based models, working libusb support is recommended, at least according to the Sourceforge page on the subject.

Unless you know your driver requires libusb support, you should probably stick with the more conventional in-kernel support for USB devices beginning in Section 2.2.1.2.

2.2.1.1. Libusb

Libusb is a library that allows access to the USB functions inLinux through userspace and without the need to enable kernel supportand insert modules. Most distributions, at this point, are offering libusb in their stablebranches (and some install it by default), so if you don't already havekernel support for USB devices, then you may only have to install thelibusb package in order to access your device.You must have USB device filesystem support enabled in your kernel,which most distributions do.To find out for sure, issue the following at the command line:

You should see (among others):

You may need to mount usbdevfs to enable it and see the devicefiles, which you can do at the command line with mount -tusbdevfs none /proc/bus/usb.Don't try to use libusb while your particular kernelwebcam support is enabled either statically or the module loaded; youcan only use one at at time.

You can obtain the libusb package in .rpm,.tgz or .deb format from yourLinux distribution.

2.2.1.2. Linux Kernel USB Support

Kernel support is required for USB webcam support if not usinglibusb (outlined above).

For 2.2 and 2.4 series kernels, your USB webcam may require the module usbvideoto function. This is not required in the 2.6+ series.

For generic USB bus support in Linux, you will need USB subsystemsupport in your kernel, whether usb-ohci, usb-ehci, or whatever flavorof USB driver your system prefers.USB subsystem support has been present in the Linux kernel since thelate 2.2 series.For a more in-depth discussion of USB support in general, I direct you tothe Linux-usb project site.If you want to find out which modules are loaded, at the command lineor in an xterm, type the following:

As shown by the prompt above, you will need to have root privilegesto do this.You should get output similar to the following:

If you don't have the particular module you're seeking loaded andyou think the module may be available, try loadingit directly (using the usb ibmcam module as an example):

...at which point you should see something like thefollowing:

By placing the entry ibmcam (for example) in/etc/modules (note that this varies by distribution),you can have the module load at boot-time automatically.You can then confirm the module was loaded by checking the syslog or inthe boot-time record with dmesg | less), where youshould see an entry such as the following:

2.2.2. IEEE 1394 (Firewire™,i.Link™)

IEEE 1394 webcams require an IEEE 1394 PCI card or an IEEE 1394bus port on your mainboard.The IEEE interface has been supported in Linux since the early 2.4-serieskernel.If you are lucky enough to own such a device, generic informationon support of the IEEE 1394 bus in Linux can be found at www.linux1394.org.If you have a kernel older than 2.4.2, you will need topatch your kernel with one of the patches found on this pagematched to your kernel version.In addition, you will require libraw1394.The previously referenced linux1394.org site has a great installationguide.

The IEEE1394Digital Camera List, by Damien Douxchamps, offers an outstandingsummary of the capabilities of IEEE 1394 cameras as well as the currentstatus of support for individual models.

2.2.3. Generic Parallel Port Support for Parport Webcams

For 2.2 and 2.4 kernel systems, parallel-port support must beenabled statically or as a module (stock kernels usually have thisenabled by default).You may want to read moregeneric info about parallel-port device support under the Linuxkernel before starting this process.To find out for sure if the module parport is loaded,you can check the dmesg file or use lsmod as outlined above.Using dmesg | less, you should see (among many otherlines) the following:

If you are compiling your own kernel, enable 'Parallel Portsupport'.You should enable 'IEEE 1284 transfer modes', and if you have x86 typearchitecture, you should also enable 'PC-style hardware'.

If modprobe returns an error when you attempt to load the module,note that you may need to determine and supply the hardware address wheninvoking modprobe.The most common address is 0x378 for an x86 system; 0x278 and 0x3BC areother possibilities for integrated or ISA parallel ports.Add-in PCI parallel ports may have unusual base addresses.You can also arrange multiple devices with either the parport_pc orparport_arc modules, though that topic is beyond the scope of thisdocument.

WARNING: Be sure you have the correct address beforeentering this information at the command line or else your machine maybecome unstable, crash or otherwise implode.

Your parallel port should be set to preferably 'EPP'mode, or alternatively ECP/EPP.'Bidirectional' (also known as 'BPP' or'PS/2') may work, albeit much more slowly.'Unidirectional' mode is unsuitable for scanning.The above setting can usually be accessed through your BIOS menu, atleast on x86 systems.

2.3. Specific Webcam Models

Note that this information is frequently changing.The Linux-USBDevice Overview site is a great place to look if you have aUSB webcam.Also, you will want to check for your model's homepage at http://www.exploits.org/v4l/.The information compiled below on specific webcam models is from thesame source, so you may find more up-to-date information through theprevious link.If you can't find an entry for your particular hardware, you can findlinks to resources on how to write your own driver!

It is important to note that if your camera isn't listed,the easiest way to find out if your camera is supported is to find outwhat chipset is used in its manufacture.

This information is usually present in the specifications published inyour webcam's manual or on the manufacturer's website.

If you can't find your camera model listedand aren't sure what chipset your camera is made with,you should consider searching and/or subscribing to thevideo4linux-list mailing list hosted by Redhat.

2.3.1. 3com HomeConnect PC Digital Webcam

This driver is supported with the kernel patch located atthe homeconnectusbproject web page.It may require a kernel recompile after patching depending on yourkernel version.

2.3.2. CPiA based Webcams

Please see the projecthome page for up-to-date information.This chipset has been used in the manufacture of both USB and parallelport webcams including the following:

Aiptek HyperVcam Fun USB (non-OV511 based)

Creative Video Blaster WebCam II USB and parallel-port

CVideo-Mail Express parallel-port

Digicom Galileo USB and Digicom Galileo Plus

Dynalink Digital Camera

Ezonics EZCam (not Pro or Plus)

I-View NetView NV200M

Microtek EyeStar USB

Pace Color Video Camera USB

SuperCam WonderEye

TCE Netcam 310 USB

Terracam USB (non-OV511 based or Terracam Pro)

Trust SpaceC@m Lite USB and SpaceC@m 100

Utopia USB Camera

ZoomCam USB and parallel-port

2.3.3. SE401, SE402 and EP800 based USB webcams

Thisproject is a work in progress.The drivers and other useful information areavailable at the project homepage located here.As of writing this, it is necessary to patch and recompile your kernelin order to obtain support for these models.The driver supports the following:

SE401 chipset via the 'se401' driver:

Aox SE401 camera

Philips PCVC665 USB VGA webcam 'Vesta Fun'

Kensington VideoCAM PC Camera (Models 67014-67017)

SE402 and EP 800 chipsets via the 'epcam' driver

Spypen Actor

Rimax Slim Multicam

Concord Eye-Q Easy

Creative PD1001

Chicony DC-100

Endpoints SE402 and EP800

2.3.4. OmniVision based Webcams

This category includes amultitude of webcam and video-capture devices manufactured by Omnivision,including the OV511(+), OV518(+), OV6620, OV6630, OV7610, and OV7620AE.The project homepage is here.Supported models include:

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Aiptek HyperVcam Home and Mobile

Amitech AWK-300

I-view NetView NV300M

TEVion MD9308

Intel Me2Cam

Dlink DSB C100, C300

Hawking Tech. UC-110, UC-300 and UC-310

Puretek PT-6007

Alpha Vision Tech AlphaCam SE model AC-520

Creative Labs WebCam model PD1001 with OV518 chipset

Creative Labs WebCam 3, WebCam Go, Webcam Go Plus

Elecom UCAM-C1C20

Elta WEBCam 8211 PCC

Ezonics EZPhone Cam

Philips ToUCam XS (old version with OV518)

LG Electronics LPC-UM10

Lifeview various USB Life TV models

Genius VideoCam Express

AverMedia Intercam Elite

Maxxtro Cam22U

MediaForte MV300, PC Vision 300

Terratec TerraCam PRO and some TerraCam models

OmniVision (except those with OV519)

TRENDNet TV-PC301

Trust Sp@ceC@m USB

Lifetec LT9388

BestBuy EasyCam U

Maxell Maxcam

TCE NetCam 310u

Medion MD9388

Webeye 2000B

Suma eON

Prochips PCA-3100

Ezonics EZ USB Cam II (the OV511+ models)

Waytech I-Pac VIC-30

Zoom Telephonics ZoomCam III USB (model 1598)

2.3.5. Logitech (formerly Connectix) QuickcamSupport

The QuickCam VC USB and parallel port modelwebcams are supported by the driver offered here.A kernel patch and recompile are necessary for support of this model.

The Quickcam driver is represented by two different projects that offer two different flavorsof driver for certain Quickcam models, both of which are stand-alonedrivers that do not require a kernel patch or recompile.The qce-ga and qc-usbdrivers support the following models:

Logitech (earlier models of) Quickcam Express

Quickcam Web

Legocam

Dexxa Webcam

Labtec Webcam

The qc-usb driver is more experimental but reportedly works betteron some models such as the Quickcam Web. Also, I have recieved correspondence that newer versions of the Logitech Quickcam Express no longer work with the above drivers; instead this page offers an experimental driver that claims to support the newer model.

Note to Redhat users: The qce-ga driver doesn't compile properly using themodified kernel source provided in Redhat 9, but a fix is available here.

Some Logitech camera models are supported by the Philips driverin Section 2.3.8.

2.3.6. ICM532 Based Webcams

One driver for this chipset, homepage here, is now merged into the 2.6 kernel source; the other is (per the developer's own description) experimental and available here. Either or both claim to support the following models:

IC-Media Corp Pencam

Newer versions of the Logitech Quickcam Express

Newer versions of the Labtec Webcam

Biolux 654 microscope

Ezonics EZCam USB II (uvt8532)

Ezonics EZCam USB III

TerraCam USB

Stick Webcam

Mini WebCam

Tucan PenCam

Che-ez! Webbie

SNAKE EYE SI-8480/8481

PC CAM CP03

WEB Camera PBC0006

Clipcam

2.3.7. NW802 Based Webcams

This chipset, manufactured by DIVIO, is supported by the driverfound here.The models supported include the following:

BTC SurfCam CMOS300k

Mustek WCam 300

Logitech QuickCam Pro USB (the earlier 'dark focus ring' model)

2.3.8. Philips USB Webcams

Because of the expiration of the Non-Disclosure-Agreement between Philips Corporation and the former maintainer of the pwc driver, the previous kernel support for Philips PWC-chip-based webcams has been removed. Luckily a new, still experimental driver that does not require a proprietary module is under development. The old site, with a discussion of the change, can be seen at http://www.smcc.demon.nl/webcam/; the new driver is maintained at saillard.org with more information at the PWC Documentation Project.

Philips models supported by the above include the following.

PCA645VC

PCA646VC

PCVC675K Vesta, Vesta Pro and Vesta Scan

PCVC720K/40 ToUCam XS, ToUCam Fun, ToUCam Pro and ToUCam Scan

Askey VC010

Creative Labs Webcam 5, Pro Ex

Logitech 3000 and 4000 Pro, Notebook Pro, and Zoom

Samsung MPC-C10 and MPC-C30

Sotec Afina Eye

Visionite VCS UM100 and UC300

2.3.9. SPCA50X USB Camera Linux Driver

Information regarding this chipset can be found here, and is under heavy development and includes partial or complete support for the following models:

Kodak DVC-325 and EZ200

Creative PC-CAM 300, 600, 750

Genius VideoCAM Express V2

Micro Innovation IC 200/IC 150

Logitech ClickSmart 310, 420, 510, 820 and Cordless models

Logitech Pocket750

Benq DC 1016, 1300, 1500, 3410

Flexcam 100

Aiptek MegaCam, [1.3 Megapixel] Mini PenCam and PocketCam 1.3M Smart

Finet Technology Palmpix DC-85

Pure DigitalDakota

3Com Home Connect lite

Megapix V4

Mustek gSmart: Mini, Mini2, Mini3, LCD 2, LCD 3

Digital Dream Enigma 1.3, Epsilon 1.3

Maxwell Compact Pc PM3

Jenoptik models

Minton S-Cam F5

D-Link DSC-350

Trust FamilyC@m 300 Movie

Aiptek Pocket DV, PocketDVII, DV3100+, mini PenCam 2, PocketCam 3M, Pencam SD 2, Pocket DV3500

Amitech Drivere

Hama Sightcam 100

Micro Innovations IC50C, IC400c

FlyCam USB100

Arowana USB Camera 300 K

Intel Easy PC Camera, CS120 (Easy PC Share), PC Camera Pro (CS431), Pocket PC Camera (CS630)

Grandtec V.cap

Sigma-Apo Petcam

2.3.10. STV0680 based Models

The USB version of webcams made with this chipset are supported bythe 2.4.18 and above kernel with the stv680.o module.Alternatively, you can obtain the source from the project homepage.This driver supports models including the Aiptek Pencam and the NisisQuickpix 2.

If you have a serial version, the main oneof which is the Scan e-Studio, you should go here.

2.3.11. Winbond w9966cf

This is a driver for the parallel-port interface that supportsthe Philips SAA7111 CCD-control chip as found on the Lifeview FlycamSUPRA webcam. It is included in the late 2.4 kernel series and laterunder the heading 'video4linux' support.The homepage for this project is here.

2.3.12. Xirlink C-it™ HDCS-1000based Webcams

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This driver is for the USB webcams manufactured by Xirlink, IBM(PC Camera) and Veo Stingray model webcams.Support has been in the Linux kernel USB section since 2.2.12.The homepage is at http://www.linux-usb.org/ibmcam.

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