Waiming Mak wrote:
> 
> Hi All,
> 
> Any one know the current status of this ? I know
> Orinoco has PCI version support, but I can NOT find
> anything for USB. Sorry if someone already ask this
> question.
Lots of people have asked the question. 

Basically there are three options for USB to 802.11 adapters.
Option 1. USB to PCMCIA adapter, with a PCMCIA card (almost always a Prism II
family device) plugged into it. Used by Agere Systems Orinoco USB Client, and
by Compaq (WL215 seems to be same device). No current support in Linux (and
no-one actively working it AFAIK, although a few people have asked for
support). The best way to do this would be to make a USB to PCMCIA bridge
driver (a peer with yenta socket, for example), and then use the orinoco
driver that Dave Gibson maintains in the kernel. The USB to PCMCIA adapter is
known to be based on a Cypress EZ-USB (maybe FX?) device that probably needs
firmware downloads. Supporting this device would need access to the specs on
the USB protocol used by the firmware. I asked Cypress for the specs, they
said it wasn't their design.

Option 2. USB interface to the existing Prism II (and II.5) MAC. No
commercially available device is known to use this. There is a Linux driver
(ftp://ftp.linux-wlan.org/pub/linux-wlan-ng/linux-wlan-ng-0.1.11-usbonly.tar.gz)
- I haven't looked at it. 

Option 3. USB interface to the Atmel AT76C503A MAC. Used by Dlink (DWL-120)
and Linksys (not the same design). Open source Linux driver in work, currently
only the firmware download works (from userspace), and some simple status
reporting, although I am planning to work on it in the next month. There is a
binary driver being developed by Atmel, although I haven't tried it yet. 

HTH

Brad

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