AN(4) BSD Programmer's Manual AN(4)NAMEan - Aironet Communications 4500/4800 wireless network adapter driver
SYNOPSIS
an0 at pcmcia?
an0 at pnp?
an0 at isa? port P irq N
DESCRIPTION
The an driver provides support for Aironet Communications 4500 and 4800
PC Card wireless network adapters. This includes the ISA, PCI and PCMCIA
varieties. The 4500 series adapters operate at 1 and 2Mbps while the
4800 series can operate at 1, 2, 5.5 and 11Mbps. The ISA, PCI and PCMCIA
devices are all based on the same core PCMCIA modules and all have the
same programming interface, the ISA and PCI cards appear to the host as
normal ISA and PCI devices and no not require any PCCARD support.
When the ISA device is used it is recommended that it be set for Plug-n-
Play mode. If pnp mode is not used the the kernel must be informed of
the i/o port base and irq as set by the dip switches. The possible port
values P are 0x140, 0x180, 0x300 and 0x340. The possible IRQ values N
are 5, 7, 9, 10, 11, 12, 14 and 15.
All host/device interaction with the Aironet cards is via programmed I/O.
The Aironet devices support 802.11 and 802.3 frames, power management,
BSS (infrastructure) and IBSS (ad-hoc) operation modes. The an driver en-
capsulates all IP and ARP traffic as 802.11 frames, however it can re-
ceive either 802.11 or 802.3 frames. Transmit speed is selectable between
1Mbps, 2Mbps, 5.5Mbps, 11Mbps or "auto" (the NIC automatically chooses
the best speed).
By default, the an driver configures the Aironet card for infrastructure
operation with no SSID. The driver may be put into ad-hoc mode via the
ifconfig(8) utility.
For more information on configuring this device, see ifconfig(8) and
ancontrol(8).
DIAGNOSTICS
an%d: init failed The Aironet card failed to come ready after an ini-
tialization command was issued.
an%d: failed to allocate %d bytes on NIC The driver was unable to allo-
cate memory for transmit frames in the NIC's on-board RAM.
an%d: device timeout The Aironet card failed to generate an interrupt to
acknowledge a transmit command.
SEE ALSOarp(4), netintro(4), ifconfig(8), ancontrol(8)HISTORY
The an device driver first appeared in FreeBSD 3.0. It was extensively
modified for use in BSD/OS, first appearing in 4.2 release.
AUTHOR
The an driver was written by Bill Paul <wpaul@ee.columbia.edu>.
It was modified for use in BSD/OS by Paul Borman <prb@bsdi.com>.
June 22, 2000 1