awi -- AMD PCnetMobile IEEE 802.11 PCMCIA wireless network driver
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
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
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.
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.
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
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
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.
Doesn't create IBSS itself.
arp(4), cnw(4), ifmedia(4), miibus(4), netintro(4), pcmcia(4), wi(4),
Am79C930 PCnet Mobile Single-Chip Wireless LAN Media Access Controller,
The awi device driver first appeared in NetBSD 1.5.
The initial version of the awi driver was written by Bill Sommerfeld
<email@example.com>. Then the awi driver module was completely
rewritten to support cards with DS phy and to support adhoc mode by
Atsushi Onoe <firstname.lastname@example.org>.
FreeBSD 5.2.1 October 31, 1999 FreeBSD 5.2.1 [ Back ]