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NAME    [Toc]    [Back]

     awi - BayStack 650 IEEE  802.11FH  PCMCIA  wireless  network

SYNOPSIS    [Toc]    [Back]

     awi* at pcmcia? function ?

DESCRIPTION    [Toc]    [Back]

     The  awi driver provides support for wireless adapters based
upon the AMD
     802.11 PCnet Mobile firmware.  This includes  the  following

           Bay Networks BayStack 650
           Bay Networks BayStack 660
           Bay Network AirSurfer Pro
           AMD Am79C930
           Icom SL-200
           Nokia C020
           Farallon Communications SkyLINE Wireless
           Zoom Air-4000

     The  PCnet  Mobile  design  is  based  on an AMD 79c930 controller, which provides
 access to 32kb of memory shared between the controller
and the
     host.   All host/device interaction is via this shared memory, which can
     be accessed either via PCMCIA memory  space  or  I/O  space.
The awi driver
     encapsulates  all  IP  and  ARP  traffic  as  802.11 frames.
Transmit speed is
     fixed at 1Mbps.

     The driver currently only works in infrastructure mode, communicating
     with an Access Point which serves as a link-layer bridge between an Ethernet
 and the wireless network.

     This card seems to take between 5 and 20  seconds  after  it
has been
     brought   up   to   synchronize  with  an  AP.   When  using
dhclient(8) to automatically
 configure an address on this card, it may  be  advisable to delay
     the  invocation  of  dhclient for about 10 seconds after the
card is brought
     up using ifconfig(8).

DIAGNOSTICS    [Toc]    [Back]

     awi0: unable to allocate memory space; using i/o only  Indicates that the
     driver  was  not able to allocate 32kb of PCMCIA bus address
space into
     which to map the device; the driver will use  the  (slightly
slower) i/ospace
  only  access  methods to read and write to the shared
memory.  This
     message is in some sense to be expected and should not be  a
cause for
     alarm.  See pcmcia(4) for information on how to increase the
     available to the PCMCIA controller.

     awi0: selftest failed (code %x)  The device failed  to  pass
its internal

     awi0:  device failed to complete selftest (code %x)  The device failed to
     complete its self test within 5 seconds.

     awi0: device timeout
     awi0: timeout waiting for  command  completion   The  device
failed to generate
 an interrupt to acknowledge a command.

     awi0: transmit timeout  The device failed to generate an interrupt to acknowledge
 a transmitted packet.

     awi0: large frame truncated  The system handed the driver  a
packet which
     was too large to transmit in one piece.

     awi0:  device  enable failed  The system was unable to power
on the card.

     awi0: associated with %s, SSID: %s  The device has  successfully synchronized
 with the identified Access Point and is ready to relay

     awi0: no recent beacon from %s; rescanning  The  device  has
not heard a
     beacon  from its currently associated Access Point recently,
and is looking
 for a new Access Point.

     awi0: received deauth  The Access Point the  card  was  most
recently associated
 with has forgotten about us.

SEE ALSO    [Toc]    [Back]

     arp(4),  ifmedia(4), intro(4), netintro(4), pcmcia(4), hostname.if(5),

     Am79C930 PCnet Mobile Single-Chip Wireless LAN Media  Access

HISTORY    [Toc]    [Back]

     The awi device driver first appeared in OpenBSD 2.7.

AUTHORS    [Toc]    [Back]

     The  awi  driver  was  written  by  Bill Sommerfeld <sommerfeld@netbsd.org> and
     ported to OpenBSD by
     Angelos D. Keromytis <angelos@dsl.cis.upenn.edu>

BUGS    [Toc]    [Back]

     Doesn't support ad-hoc mode or WEP.  Round trip  times  seem
higher than
     what one might expect.

OpenBSD      3.6                          March      20,     2004
[ Back ]
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