p54u is a reverse engineered driver
for USB Prism54 SoftMAC wireless devices with
the ISL3880, ISL3886, and GW3887 chipsets.
It supports many of the USB adapters sold
nowadays.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
A race condition in data transmission was fixed along with USB IDs for the Inventel UR054G. UART PCI debugger support was added for version 1 devices. A code cleanup was made, PCI timings were improved, and changes changes were incorporated from patch 131 of the Linux driver.