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AWI(4)

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NAME    [Toc]    [Back]

     awi -- AMD PCnetMobile IEEE 802.11 PCMCIA wireless network driver

SYNOPSIS    [Toc]    [Back]

     device awi

DESCRIPTION    [Toc]    [Back]

     The awi driver supports various IEEE 802.11 wireless cards which run AMD
     PCnetMobile firmware based on AMD 79c930 controller with Intersil (formerly
 Harris) PRISM radio chipset.  It 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.

     The driver works both in infrastructure mode and in adhoc (independent
     BSS) mode.

     In infrastructure mode, it communicates with an Access Point which serves
     as a link-layer bridge between an Ethernet and the wireless network.  An
     access point also provides roaming capability which allows wireless nodes
     to move between access points.

     In adhoc mode, it communicates peer to peer.  Though it is more efficient
     to communicate between wireless nodes, the coverage is limited spatially
     due to lack of roaming capability.

     In addition to these two modes in the IEEE 802.11 specification, the awi
     driver also supports a variant of adhoc mode out of spec for DS radio
     cards, which makes it possible to communicate with adhoc mode of wi(8)
     driver.  The NWID doesn't affect in this mode.

     For more information on configuring this device, see ifconfig(8) and
     ifmedia(4).

HARDWARE    [Toc]    [Back]

     Cards supported by the awi driver include:

	   BayStack 650   1Mbps Frequency Hopping PCCARD adapter

	   BayStack 660   2Mbps Direct Sequence PCCARD adapter

	   Icom SL-200	  2Mbps Direct Sequence PCCARD adapter

	   Melco WLI-PCM  2Mbps Direct Sequence PCCARD adapter

	   NEL SSMagic	  2Mbps Direct Sequence PCCARD adapter

	   Netwave AirSurfer Plus
			  1Mbps Frequency Hopping PCCARD adapter

	   Netwave AirSurfer Pro
			  2Mbps Direct Sequence PCCARD adapter

     The original Xircom Netwave AirSurfer is supported by the cnw(4) driver.

MEDIA SELECTION    [Toc]    [Back]

     The DS cards support DS1 and DS2 media types, while the FH cards support
     FH1 media type.  For each media type, adhoc mediaopt can be used to indicate
 the driver to operate in adhoc mode.	For DS radio cards,
     adhoc,flag0 mediaopt can be used for wi(4) compatible adhoc mode.

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.	Since
     by default, NetBSD only allocates 16kb of address space per PCMCIA controller,
 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
     memory available to the PCMCIA controller.

     awi0: failed to complete selftest (%s)  The device failed to complete its
     self test.

     awi0: synced with no-bssid at channel %d  The device is ready to relay
     traffic at specified channel.

     awi0: synced with %s ssid %s at channel %d  The device has successfully
     synchronized with at least one of the identified stations and is ready to
     relay traffic.

     awi0: associated with %s ssid %s channel %d signal %d  The device has
     successfully synchronized with the identified Access Point and is ready
     to relay traffic.

     awi0: authentication failed (reason %d)
     awi0: association failed (reason %d)  The access point refuses the association
 request from the device.

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

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

     awi0: failed to lock interrupt  The system was unable to obtain the lock
     to access shared memory.

     awi0: command %d failed %x  The device failed to complete the request
     from the system.

BUGS    [Toc]    [Back]

     Doesn't create IBSS itself.

SEE ALSO    [Toc]    [Back]

      
      
     arp(4), cnw(4), ifmedia(4), miibus(4), netintro(4), pcmcia(4), wi(4),
     ifconfig(8)

     Am79C930 PCnet Mobile Single-Chip Wireless LAN Media Access Controller,
     http://www.amd.com.

HISTORY    [Toc]    [Back]

     The awi device driver first appeared in NetBSD 1.5.

AUTHORS    [Toc]    [Back]

     The initial version of the awi driver was written by Bill Sommerfeld
     <sommerfeld@netbsd.org>.  Then the awi driver module was completely
     rewritten to support cards with DS phy and to support adhoc mode by
     Atsushi Onoe <onoe@netbsd.org>.


FreeBSD 5.2.1		       October 31, 1999 		 FreeBSD 5.2.1
[ Back ]
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