After banging my head against the wall for whole last saturnday, I
decided to share some info about ZD1211B wlan drivers.
I tried to purchase an adapter with zd1211 chipset, and chose A-LINK
WL54USB, but manufacturer had replaced chip with zd1211b. Fortunately
zd1211 drivers can be compiled with b-revision support and drivers are
seemingly working well, but they are very unrealiable. I get constant
RX-errors and packet loss is about 20%. If I ping the accesspoint,
connection may work fine for a while, but then all packets are lost for
about a minute or so. However, association to the accesspoint is never
lost. I used TS9-kernel and zd1211 drivers from version R83 that are
downloadable from http://sourceforge.net/projects/zd1211.
I finally give up with those drivers and tried Atheros (Zydas merged
with Atheros) official drivers, that are downloadable from
http://www.atheros.com/RD/downloads/download_ZD1211B.htm. Those drivers
work with TS9 kernel, only caveat is that you must copy div64.S file
from kernel directory, compile it and edit drivers makefile to link
resulting .o file in. Otherwise you get unresolved symbol error when
trying to load the module.
The official drivers seem to work very well. There are few things to
note, one is that restricted command to iwconfig doesn't work (in case
of a shared key accesspoint). You have to issue command "iwpriv eth1
set_auth 1". Read user guide from drivers download page, it contains
useful information about drivers usage.
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