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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 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 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 seen 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 was completely rewritten to support cards with DS phy and to support adhoc mode by Atsushi Onoe <onoe@netbsd.org>. FreeBSD 4.10 October 31, 1999 FreeBSD 4.10
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | MEDIA SELECTION | DIAGNOSTICS | BUGS | SEE ALSO | HISTORY | AUTHORS
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