00:06.0 Etherenet controller: Atheros Communications, inc. AR5212 902.11abc NIC (rev 01)
OK, you've got the Atheros chipset which madwifi is designed to use.
Distribution: slackware 9.1 i cant even find where to download madwifi... any help?
Their project page is here
. Its the first link if you google for madwifi. Like I said, madwifi is under construction and you'll probably have to use CVS to get the code.
If you do a little googling (like on Atheros linux driver) you'll find that Atheros themselve have been suggesting
madwifi as their official linux drivers for about a year now.
If I were in your shoes I'd be doing a bit of reading here at LQ on madwifi. There are quite a number of threads on the subject.