As pointed out by batFINGER, if you're using 14.x and ndiswrapper won't work (in my case with AirLink101 AWLH 3025 which uses Texas Instruments ACX 111 chipset), the instructions at https://wiki.debian.org/acx may work for you. Worked first time for me on Ubuntu 14.04 64 bit.
As suggested by Ravan, perhaps that link will one day disappear, so here's an overview:
acx-mac80211 is an experimental, reverse-engineered, out-of-tree Linux kernel driver for wireless LAN devices based on Texas Instruments ACX100/TNETW1100, ACX111/TNETW1130, ACX100USB and TNETW1450 chipsets. It is developed by the acx100 project.
To list your PCI network devices use
lspci -nn | grep Network
To list your USB network devices use
PCI: 104C:8400 Texas Instruments ACX 100 22Mbps Wireless Interface
PCI: 104C:8401 Texas Instruments ACX 100 22Mbps Wireless Interface
PCI: 104C:9066 Texas Instruments ACX 111 54Mbps Wireless Interface
USB: 0451:60C5 Texas Instruments, Inc. (Device name unknown)
USB: 057C:5601 AVM GmbH AVM Fritz!WLAN [Texas Instruments TNETW1450]
USB: 057C:6201 AVM GmbH AVM Fritz!WLAN v1.1 [Texas Instruments TNETW1450]
USB: 07B8:B21A AboCom Systems Inc WUG2400 802.11g Wireless Adapter [Texas Instruments TNETW1450]
USB: 0CDE:0017 Z-Com (Device name unknown)
USB: 2001:3B00 D-Link Corp. AirPlus DWL-120+ Wireless Adapter [Texas Instruments ACX100USB]
USB: 2001:3B01 D-Link Corp. WLAN Boot Device
This driver supports the WPA and WPA2 security protocols. Non-free firmware is required for device operation.
Install the firmware
For ACX 100, specific firmware is needed.
To install all firmware versions for ACX 111, use:
$ sudo suAlternate installation methods are described within the repository's INSTALL file.
# for i in "" c16 c17 r16 r17 ; do wget -P /lib/firmware http://acx100.erley.org/fw/acx111_188.8.131.52/tiacx111$i ; done
To install firmware for ACX100USB use:
# wget -P /lib/firmware http://acx100.erley.org/fw/acx100_1.0.9-USB/tiacx100usbc0D
To install firmware for TNETW1450 use:
# wget -P /lib/firmware http://acx100.erley.org/fw/acx111_184.108.40.206-USB/tiacx111usbc1B
Installing the driver
Driver installation can be automated with DKMS.
Check out the repo:
$ git clone git://git.code.sf.net/p/acx100/acx-mac80211 acx100-acx-mac80211
Move to correct location
$ sudo su
# mv acx100-acx-mac80211 /usr/src/acx-mac80211-git
Add acx-mac80211-git to the tree for building and installing:
# dkms add -m acx-mac80211 -v git
Build and install the acx-mac80211 module:
# dkms build -m acx-mac80211 -v git
# dkms install -m acx-mac80211 -v git
Load the module:
# modprobe acx-mac80211
If necessary, connect the device to your system.
Configure your wireless interface as appropriate.
Alternate installation methods are described within the repository's INSTALL file.