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AWI(4)		       FreeBSD Kernel Interfaces Manual			AWI(4)

NAME
     awi -- AMD	PCnetMobile IEEE 802.11	PCMCIA wireless	network	driver

SYNOPSIS
     device awi

DESCRIPTION
     The awi driver supports various IEEE 802.11 wireless cards	which run AMD
     PCnetMobile firmware based	on AMD 79c930 controller with Intersil (for-
     merly 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 node
     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 mode in IEEE 802.11 specification, the awi
     driver also supports a variant of adhoc mode out of spec for DS radio
     cards, which makes	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
     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
     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 indi-
     cate the driver to	operate	in adhoc mode.	For DS radio cards,
     adhoc,flag0 mediaopt can be used for wi(4)	compatible adhoc mode.

DIAGNOSTICS
     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/o-
     space only	access methods to read and write to the	shared memory.	Since
     by	default, NetBSD, only allocates	16kb of	address	space per PCMCIA con-
     troller, 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	asso-
     ciation request from the device.

     awi0: no recent beacons from %s; rescanning  The device has not heard a
     beacon from its currently associated Access Point recently, and is	look-
     ing 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
     Doesn't create IBSS itself.

SEE ALSO
     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
     The awi device driver first appeared in NetBSD 1.5.

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

FreeBSD	10.1		       October 31, 1999			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | MEDIA SELECTION | DIAGNOSTICS | BUGS | SEE ALSO | HISTORY | AUTHORS

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