Here is a list of open source Linux drivers that are already written, but are not included in the main Linux kernel.org tree for one reason or another. These are all possible projects that the Linux Driver Project developers could undertake to move the driver into the main kernel tree.

Note, please do not list closed source drivers here, or ones that contain some kind of licensing issue that prevents them from being merged into the Linux source tree due to a legal issue. If no open source driver exists for the same hardware, please add an entry on DriversNeeded if one does not already exist.

Firewire

• a list of out-of-tree FireWire drivers http://wiki.linux1394.org/Links/Software/OutOfTreeDrivers
• PCILynx driver needs to be ported to the new FireWire stack (code-named Juju).

Networking

Fixed Ethernet

• Agere Systems ET-131x PCI-E Ethernet Controller driver
• Chelsio TOE and RDMA support for Terminator 3 (T3) family Ethernet Adapter drivers S310E S320E S320X and R310E. Networking maintainers do not want support for this class of hardware in kernel. See http://service.chelsio.com/ and http://service.chelsio.com/site-bin/readme.cgi?FILE=linux/t3/README-cxgb3toe
• Solarflare Solarstorm SFC4000 Ethernet controller - apparently blocked on review
• Atheros Lan Driver (atl2) built into Asus eePC. Maintained by a Redhat Guy out of stream.

Wireless 802.11

• ACX wireless driver - Homepage: http://acx100.sourceforge.net/ Wiki: http://acx100.sourceforge.net/wiki/Main_Page. See also the kernel inclusion section in the project's wiki for some background information on the previous attempt to include the driver in the mainline kernel.
• D-Link DWL G122: driver written by RalinkTech? (RT2500USB? - does not work very well) , source: http://www.ralinktech.com/ralink/Home/Support/Linux.html .
• Realtek RTL8185 rtl-wifi, linux wireless mailing list in 2.6.25
• madwifi/ath5k http://madwifi.org/ (ath5k currently in wireless-2.6 tree)
• Wireless RNDIS (Broadcom 4320, other?) http://www.jooz.net/rndis/ in 2.6.25 (rndis_wlan)
• Intel PRO/Wireless 2200BG AP Driver for Linux http://sourceforge.net/projects/ipw2200-ap
• Prism2 USB dongles are not supported by the in-kernel driver, only by http://www.linux-wlan.com/linux-wlan/, see also: http://lists.linux-wlan.com/pipermail/linux-wlan-devel/2007-October/003724.html
• Atmel at76c50* in PCMCIA and PCI has a driver in-kernel, but it does not support WPA-CCMP (the SUITE_CIPHER_AES constant is there but unused); out-of-kernel drivers do support it, but they have been rotting since 2004. I at least thought it was worth mentioning.
• at76_usb - Linux driver for Atmel AT76C503? /AT76C505 based USB WLAN adapters http://at76c503a.berlios.de/. List of Atmel AT76C502? /3/5A based wireless USB devices is at http://at76c503a.berlios.de/devices.html
• 3Com 11 Mbps Wireless Lan Pc Card (3crwe62092a) as used in model WL-305 http://www.xs4all.nl/~bvermeul/swallow/ or http://sourceforge.net/projects/poldhu, These drivers I find are difficult to compile.

Controller Area Network (CAN, ISO 11898)

• pcan http://www.peak-system.com/linux/index.htm Peak-System Technik CAN interfaces (ISA, PC/104, parport, PCI, PCMCIA, USB, PC/104plus, embedded variants)
• lincan http://www.ocera.org/download/components/WP7/lincan-0.3.3.html

Misc

• iBurst http://sourceforge.net/projects/ibdriver http://en.wikipedia.org/wiki/Iburst
• mISDN http://www.misdn.org/
• The Zaptel drivers for the Digum telephony interfaces http://ftp.digium.com/pub/zaptel/
• Wanpipe drivers for Sangoma telephony hardware: http://wiki.sangoma.com/wanpipe-linux-drivers (very old version already in kernel?) contains binary-only blobs
• NDISWrapper http://ndiswrapper.sourceforge.net/ - implements Windows kernel API and NDIS API within Linux kernel. mostly acting as a compatibility layer to be able to load proprietary windows drivers when there is no Linux driver available. Not sure if any kernel developer want`s this in mainline at all, so it`s just being listed for completeness here.
• kclown_spy http://clownix.net/ This kernel module permits the display of real-time plots for bandwidth of tcp/udp connexions and for qdiscs monitoring.
• l7-filter http://l7-filter.sourceforge.net/ Linux layer 7 packet classifier
• Unicorn driver http://www.bewan.com/bewan/drivers/A1012-A1006-A904-A888-A983-0.9.3.tgz doesn't compile on 2.6.24. On 2.6.22 with patches form community it compiles but works unstable. Driver needs to be rewritten completely.
• Pulsar ADSL card http://sourceforge.net/projects/openadsl/
• IMQ http://www.linuximq.net/. IFB was added to mainline to provide similiar functionality as IMQ but didn't go all the way thus IMQ is still being used.

Storage

• Oracle ASMLib Kernel Driver http://oss.oracle.com/projects/oracleasm/

ATA

• Promise Technology "SuperTRAK" SX6000 ATA Raid controller -- There is a driver for 2.4 kernels at http://www.promise.com/support/file/Driver/1_st6000src_1.34.zip but it hasn't been updated since 2003 and does not work in 2.6 kernels.
• Promise Technology "FastTRAK" SX4000 ATA Raid controller -- There is a partial source driver for 2.4 kernels at http://www.promise.com/upload/Support/Driver/5_ftsrc-b25.tgz but like the SX6000 driver it also has not been updated since 2003 and will not build for 2.6 kernels.
• Areca SATA and PATA raid controllers -- Please help them get their code into the main tree, they really want to! ftp://ftp.areca.com.tw/RaidCards/AP_Drivers/Linux/
• Highpoint RocketRAID? 3xxx ATA RAID controller -- There is a driver for 2.6 kernels at http://www.highpoint-tech.com/USA/bios_rr3520.htm#opensourcedriver. I have not tested this driver, but it is properly GPLd without any nasty binary surprises.

Card Readers

• O2Micro OZ711MS1/!OZ711MP1 controller, a card reader for MMC/SD/MS Pro, more info, driver for pre-2.6.17-series kernel
• sdricoh_cs mmc/sd-cardreader http://sdricohcs.sourceforge.net/
• Neuros SD/MMC card readers (davinci.c, dm320_mmc.c, itomap2430_hsmmc.c, omap24xx_mmc.c, omap2430_hsmmc.c, etc). http://www.google.com/search?hl=en&lr=&q=+site%3Asvn.neurostechnology.com+mmc&btnG=Search

SCSI

• Accusys scsi raid driver http://uwsg.iu.edu/hypermail/linux/kernel/0710.2/2783.html
• Feral QLogic Combined Target/Initiator driver http://www.feral.com/isp.html
• ATARI SCSI (ACSI)1, 2 need to be ported from 2.4 kernel
• AEC-671X SCSI adapter driver (atp870u), was working in 2.4 kernel, broken in 2.6.
• ppSCSI, drivers for various parallel-port-to-SCSI chips, so your parallel-port-connected device shows up as a SCSI device. 2.6 version here: http://penguin-breeder.org/kernel/download/
• vscsihba - Virtual SCSI HBA Project http://vscsihba.aboo.org/
• cdemu-vhba - emulates SCSI HBA for cdemu project http://sourceforge.net/mailarchive/forum.php?thread_name=4661CC59.4030909%40email.si&forum_name=cdemu-devel

iSCSI

• iscsitarget "iSCSI Enterprise Target". Note that the [[FAQ says that "Kernel patches are not necessary.", but this does not mean that kernel modules do not exist. The FAQ answer seems to exist to contrast iscsitarget against the older project it forked from, which required a patch to the kernel itself in addition to modules it supplied.
• iSCSI-SCST http://scst.sourceforge.net - a forked version of IET (iSCSI Enterprise Target) - bugfixes, performance improvements and new features (pass-through support for tape drives etc.).
• Note: both of these probably are hard to sell, since stgt was merged upstream in kernel 2.6.20.

Tape

• lin_tape driver for IBM scsi/fc tape drives and libraries, open-source rewrite of the older proprietary IBMtape driver
• FTape driver, 1, 2
• HP Colorado Trakker tape driver

Disk encryption

• TrueCrypt for Linux
• loop-AES (uncooperative with kernel developers)
• BestCrypt for Linux (incompatible license?)

USB

• USB device sharing system over IP network
• Driver for spcp8x5 USB to serial adaptor. Used in ACT Solutions HomePro? /Zwave controller ZCU201.

Video Input

Web Cams

• another webcam driver http://qce-ga.sourceforge.net/
• Divio NW802 and related (various cameras, various chipsets). SF project very infrequently updated
• Logitech Trash.MainQuickCam Express driver for several Trash.MainQuickCam webcams, see http://sourceforge.net/projects/qce-ga/. Note that the website is out of date with the SF.net Project pages.
• webcam driver http://mxhaard.free.fr/spca5xx.html (an awful lot of common webcams) was not merged because it does JPEG decoding in kernel space. needs to be ported to Video4Linux 2 API?
• WisChip (now Micronas) go7007 chipset for various video capture devices including the Plextor ConvertX series of USB devices. A GPL'd driver exists, originally written by WisChip, but it is no longer maintained and needs to be worked into mainline. See: http://oss.wischip.com/ and http://nikosapi.org/wiki/index.php/WIS_Go7007_Linux_driver.
• linux-uvc http://linux-uvc.berlios.de/ Implements the USB-UVC standard, works with a huge number of (new) webcams; Is not included due to problems with the V4L2 specs.
• Ricoh Webcam Ry5u870: 05ca:1830, 05ca:1832, 05ca:1833, 05ca:1834, 05ca:1835, 05ca:1836, 05ca:1870, 05ca:1810. There is a working driver http://avilella.googlepages.com/r5u870-0.10.0.tgz but needs to be incorporated in the mainstream kernel.
• Webcams with the ALI M5603C? and M5602 chipset. There is a driver, but it doesn't work quite well, and I think it would need some love: http://sourceforge.net/projects/m560x-driver/. These chipsets are used in some built-in webcams.
• Syntek DC-1125 driver aka stk11xx. Not merged yet due to problems with bayer conversion and scaling not seperated to v4l.

V4L

• V4L driver for Matrox Marvel G200-TV and G400-TV
• RivaTV: Enables video-in TV tuners that come with NVIDIA graphics cards.

Video Output

• device3dfx kernel driver for Voodoo boards svn://sf.net/projects/glide
• mga_vid driver for Matrox cards
• radeonfb ATOM BIOS parser and support for newer cards http://lwn.net/Articles/215965/ http://thread.gmane.org/gmane.linux.kernel/530781
• DXR3 & Hollywood plus Mpeg2 Decoder card http://dxr3.sf.net/
• radeonlcd http://fdd.com/software/radeon/

Audio

• hardsid driver http://hardsid.sourceforge.net/

Input Devices

• acer hotkey driver http://www.cakey.de/acerhk/ (Does not work on x86-64 because it calls 32 bit protected mode BIOS routines; it can't be ported to libx86 because this can currently only make 16 bit real mode BIOS calls)
• ATI Remote Wonder Plus http://mythtv.wbond.net/remote_wonder_plus_linux/
• Creative DXR2 http://sourceforge.net/projects/dxr2 (only works on linux-2.4)
• panasonic hotkey driver http://www.da-cha.jp/letsnote
• lirc http://www.lirc.org and the lirc drivers for Hauppauge cards at http://ivtvdriver.org
• Synaptics USB driver for cPad and other USB touchpads
• wacom driver http://linuxwacom.sourceforge.net/

Multiport Serial Devices

• Digi RealPort (dgrp) ethernet-connected multiport console/serial servers ... out-of-tree driver since 1999.
• (dgap) Digi AccelePort? C/X, XEM, Xr and EPC/X driver
• (dgdm) Digi AccelePort? RAS and XP driver
• (dgnc) Digi Neo and ClassicBoard? driver
• espx driver - Equinox/Avocent ESP-series serial-over-ip devices
• eqnx/sst driver - Equinox/Avocent SST multiport serial driver

Filesystems

• cloop "compressed loop" driver
• OMFS, the "optimized MPEG fIlesytem"; used on the Rio Karma and ReplayTV. http://linux-karma.sf.net/. Note, there is now a project to implement this in FUSE: http://repo.or.cz/w/omfs_fuse.git
• squashfs http://squashfs.sf.net/
• reiser4
• NILFS http://www.nilfs.org/
• btrfs http://oss.oracle.com/projects/btrfs/
• unionfs http://www.am-utils.org/project-unionfs.html Not in mainline yet, but part of andrew morton`s -mm tree.
• YAFFS NAND flash filesystem

Network Block Devices

• DRBD
• Enhanced Network Block Device (enbd)
• GNBD
• vblade-kernel for exporting blockdevices via AoE? (ATA Over Ethernet)
• kvblade ditto, but different implementation

LSM (Linux Security Modules)

• AppArmor? http://opensuse.org/Apparmor/
• Dakuzo http://www.dazuko.org/
• LIDS http://www.lids.org/
• MultiADM? http://jengelh.hopto.org/p/multiadm/
• SMACK Simplified Mandatory Access Control Kernel http://kerneltrap.org/Linux/Simplified_Mandatory_Access_Control_Kernel
• TOMOYO Linux http://tomoyo.sourceforge.jp/
• TALPA http://sourceforge.net/projects/talpa/ Intercepts file accesses and allows userspace daemons to vet them. Part of Sophos security products. Please mind discussion thread at http://marc.info/?l=linux-kernel&m=119625408226843&w=2

Virtualization

• kqemu driver http://fabrice.bellard.free.fr/qemu/
• VirtualBox virtualization drivers
• various VMware drivers as part of the open-vm-tools package

Architectures

• Linux/98 project: Linux for the PC-98 NEC architecture 1, 2
• NEC Osprey board (vr4181) 1
• Linux Tiny patchset to minimize memory footprint and enable booting on embedded and old i386 devices (maintained by Sony)
• http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/jbglaw/vax-linux.git;a=summary Vax port

Data acquisition / custom device control

• comedi http://www.comedi.org/ - "The Comedi project develops open-source drivers, tools, and libraries for data acquisition."
• dmx4linux http://llg.cubic.org/dmx4linux/ (like midi, but for lighting)
• GPIB/IEEE488 USB Controller, model NI GPIB-USB-HS by National Instruments. http://linux-gpib.sourceforge.net/
• linuxclc http://sourceforge.net/projects/linuxclc/ - "This is a Linux 2.4 driver for ISA, PC-104 and serial Indramat CLC cards for SERCOS motion control."
• camac http://www.ifh.de/~ole/camac/ Wiener CC-16 ISA-CAMAC, Jorway J73A? SCSI-CAMAC controllers, and a few others
• ccp http://psux1.kek.jp/~kohama/ccp/ccp.html CAMAC, TKO and Fastbus driver for Hoshin CCP-IBM(ISA) controller
• camdrv http://www.awa.tohoku.ac.jp/%7Esanshiro/kinoko/camdrv/index.html CAMAC driver for CC/7700-PCI,CC/7700-ISA,CC/7000-ISA,CCP (PCI/ISA),CCP (PCI-2703A)
• k2927/k2915/acc_unidaq http://www.elc.nias.ac.jp/~daq/software/ drivers for various KineticSystems? CAMAC cards

VME

• SIS1100/SIS3100 PCI to VME interface (VME is a bus architecture popular in high-end physics labs and mission-critical systems) - the existing Linux source can be found at http://www.struck.de/linux1100.htm
• vmedrv is a device driver for Linux 2.x for the PCI-VME bus adapter Model 616/617/618/620 manufactured by SBS Technologies (Bit3).

Test/development cards

• ex10 ex10_i2c ex10_spi Modules for Amfeltec eX10 PCI Extender, GPL, included on accompanying cd only.

Uncategorised

• Catweasel Advanced Floppy Controller driver http://www.soundtracker.org/raw/cwfloppy/
• Catweasel i/o device drivers... driver for the joystick/mice/keyboard parts (sid part is covered by compatible hardsid, see Audio section), see above for the floppy controller part http://llg.cubic.org/cw/
• omnibook kernel driver http://sourceforge.net/projects/omnibook
• Experimental Toshiba ACPI Driver (needed for Toshset to control fan speeds, LCD brightness, etc.) http://memebeam.org/toys/ExperimentalToshibaAcpiDriver
• parallel port hardware http://www-stud.ims.uni-stuttgart.de/~voegelas/pcf.html
• speakup http://www.linux-speakup.org/
• Texas Instruments UltraMedia? Firmware Loader http://penguin-breeder.org/kernel
• PJB100 mp3 player http://openpjb.sourceforge.net/ with patches for recent kernels appearing at http://tech.groups.yahoo.com/group/PJB100-mp3/
• grsecurity, gadmin and PAX http://grsecurity.org/
• ATOP process counters http://www.atcomputing.nl/Tools/atop/kernpatch.html
• LTTng http://ltt.polymtl.ca/
• uloop - kernel driver for implementing loopdevice in userspace. http://aufs.cvs.sourceforge.net/aufs/aufs/sample/uloop/00readme.txt?view=log
• dm-userspace - similar to uloop, but different, device-mapper-style implementation. http://wiki.xensource.com/xenwiki/DmUserspace
• cowloop - copy-on-write loop driver to be used on top of any other block driver. http://www.atcomputing.nl/Tools/cowloop/
• DENX tree for various embedded architectures: http://www.denx.de/en/Software/GIT