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NetBSD 6.1.5 - man page for awi (netbsd section 4)

AWI(4)				   BSD Kernel Interfaces Manual 			   AWI(4)

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

SYNOPSIS
     awi*     at pcmcia? function ?

DESCRIPTION
     The awi driver supports various IEEE 802.11 wireless cards that run AMD PCnetMobile firmware
     based on the AMD 79c930 controller with the 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 accomplished via this shared memory, which can be accessed either
     via PCMCIA or I/O memory spaces.  The awi driver encapsulates all IP and ARP traffic in
     802.11 frames.

     The driver works both in infrastructure mode and in ad-hoc (independent BSS) mode.

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

     In ad-hoc mode, the device communicates peer to peer.  Although it is more efficient to com-
     municate between wireless nodes, the coverage is limited spatially due to the lack of roam-
     ing capability.

     In addition to these two modes in the IEEE 802.11 specification, the awi driver also sup-
     ports a variant of ad-hoc mode outside of the spec for DS radio cards.  This makes it possi-
     ble to communicate with the WaveLAN ad-hoc mode of wi(4) driver.  The NWID has no effect in
     this mode.

     Another mode added to the awi driver can be used with old Melco access points with 2Mbps
     cards.  This mode actually uses the IEEE 802.11 ad-hoc mode with encapsulation of raw Ether-
     net packets (including headers) in 802.11 frames.

     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
	   Nokia C020 WLAN
			  2Mbps Direct Sequence PCCARD adapter
	   Farallon SkyLINE
			  2Mbps Direct Sequence PCCARD adapter
	   Zoom Air Model 4000

     The original Xircom Netwave AirSurfer is supported by the cnw(4) driver, and the PRISM-II
     cards are supported by the wi(4) driver.

MEDIA SELECTION
     In addition to default Auto media type, the DS cards support DS1 and DS2 media types, while
     the FH cards support the FH1 media type.  For each media type, the adhoc mediaopt can be
     used to indicate to the driver to operate in ad-hoc mode.	The flag0 mediaopt should be used
     only with old access points, which operate in IBSS mode.  For DS radio cards, the
     adhoc,flag0 mediaopt can be used for wi(4) compatible WaveLAN ad-hoc mode.

DIAGNOSTICS
     awi0: no suitable CIS info found  The device cannot be mapped due to a resource conflict.
     Or, the device failed to initialize its firmware.

     awi0: failed to complete selftest (%s)  The device failed to complete its self test.  In
     some circumstances, resetting device after power on fails.  Re-inserting the card or setting
     the interface up and then down again (using ifconfig(8)) may also be helpful.

     awi0: transmit timeout  The device failed to generate an interrupt to acknowledge a trans-
     mitted 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.

SEE ALSO
     arp(4), cnw(4), ifmedia(4), netintro(4), pcmcia(4), wi(4), ifconfig(8), wiconfig(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>.  It was then completely rewritten to support cards with the DS phy
     and ad-hoc mode by
     Atsushi Onoe <onoe@NetBSD.org>.

BSD					 January 2, 2006				      BSD


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