new iwn(4) driver for Intel Wireless WiFi Link 4965AGN.

no support for 802.11n functions yet (need work in net80211(9) first).
committed over my 4965AGN, with only 2 of 3 antennas plugged :-)

needs a firmware that is not freely redistributable (see man page).

ok deraadt@

2 files changed, 261 insertions, 2 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index f38d6cb0134..8746c8f6e3a 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.424 2007/09/04 20:19:24 deraadt Exp $
+#	$OpenBSD: Makefile,v 1.425 2007/09/06 16:37:03 damien Exp $
 
 MAN=	aac.4 ac97.4 acphy.4 \
 	acpi.4 acpiac.4 acpibat.4 acpibtn.4 acpicpu.4 acpidock.4 \
@@ -23,7 +23,7 @@ MAN=	aac.4 ac97.4 acphy.4 \
 	ichiic.4 ichwdt.4 icmp.4 icmp6.4 icsphy.4 ifmedia.4 \
 	iha.4 iic.4 inet.4 inet6.4 inphy.4 iop.4 iophy.4 ioprbs.4 \
 	iopsp.4 ip.4 ip6.4 ipcomp.4 ipgphy.4 ipmi.4 ips.4 ipsec.4 ipw.4 \
-	isa.4 isagpio.4 isapnp.4 ises.4 isp.4 it.4 iwi.4 ixgb.4 \
+	isa.4 isagpio.4 isapnp.4 ises.4 isp.4 it.4 iwi.4 iwn.4 ixgb.4 \
 	jmb.4 \
 	ksyms.4 kue.4 lc.4 lge.4 lkm.4 lm.4 \
 	lmc.4 lmenv.4 lmn.4 lmtemp.4 lo.4 lofn.4 lpt.4 lxtphy.4 luphy.4 \
diff --git a/share/man/man4/iwn.4 b/share/man/man4/iwn.4
new file mode 100644
index 00000000000..85d90698715
--- /dev/null
+++ b/share/man/man4/iwn.4
@@ -0,0 +1,259 @@
+.\" $OpenBSD: iwn.4,v 1.1 2007/09/06 16:37:03 damien Exp $
+.\"
+.\" Copyright (c) 2007
+.\"	Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: September 6 2007 $
+.Os
+.Dt IWN 4
+.Sh NAME
+.Nm iwn
+.Nd Intel Wireless WiFi Link 4965AGN IEEE 802.11a/b/g/Draft-N wireless network device
+.Sh SYNOPSIS
+.Cd "iwn* at pci?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for
+.Tn Intel
+Wireless Wi-Fi Link 4965AGN Mini PCI Express network adapters.
+.Pp
+These are the modes the
+.Nm
+driver can operate in:
+.Bl -tag -width "IBSS-masterXX"
+.It BSS mode
+Also known as
+.Em infrastructure
+mode, this is used when associating with an access point, through
+which all traffic passes.
+This mode is the default.
+.It monitor mode
+In this mode the driver is able to receive packets without
+associating with an access point.
+This disables the internal receive filter and enables the card to
+capture packets from networks which it wouldn't normally have access to,
+or to scan for access points.
+.El
+.Pp
+.Nm
+supports software WEP.
+Wired Equivalent Privacy (WEP) is the de facto encryption standard
+for wireless networks.
+It can be typically configured in one of three modes:
+no encryption; 40-bit encryption; or 104-bit encryption.
+Unfortunately, due to serious weaknesses in WEP protocol
+it is strongly recommended that it not be used as the
+sole mechanism to secure wireless communication.
+WEP is not enabled by default.
+.Pp
+The device has one temperature sensor in degC.
+Sensor data is updated every 500 milliseconds.
+.Sh CONFIGURATION
+The
+.Nm
+driver can be configured at runtime with
+.Xr ifconfig 8
+or on boot with
+.Xr hostname.if 5
+using the following parameters:
+.Bl -tag -width Ds
+.It Cm bssid Ar bssid
+Set the desired BSSID.
+.It Fl bssid
+Unset the desired BSSID.
+The interface will automatically select a BSSID in this mode, which is
+the default.
+.It Cm chan Ar n
+Set the channel (radio frequency) to be used by the driver based on
+the given channel ID
+.Ar n .
+.It Fl chan
+Unset the desired channel to be used by the driver.
+The driver will automatically select a channel in this mode, which is
+the default.
+.It Cm media Ar media
+The
+.Nm
+driver supports the following
+.Ar media
+types:
+.Pp
+.Bl -tag -width autoselect -compact
+.It Cm autoselect
+Enable autoselection of the media type and options.
+.El
+.It Cm mediaopt Ar opts
+The
+.Nm
+driver supports the following media options:
+.Pp
+.Bl -tag -width monitor -compact
+.It Cm monitor
+Select monitor mode.
+.El
+.It Fl mediaopt Ar opts
+Disable the specified media options on the driver and return it to the
+default mode of operation (BSS).
+.It Cm mode Ar mode
+The
+.Nm
+driver supports the following modes:
+.Pp
+.Bl -tag -width 11b -compact
+.It Cm 11a
+Force 802.11a operation.
+.It Cm 11b
+Force 802.11b operation.
+.It Cm 11g
+Force 802.11g operation.
+.El
+.It Cm nwid Ar id
+Set the network ID.
+The
+.Ar id
+can either be any text string up to 32 characters in length,
+or a series of hexadecimal digits up to 64 digits.
+An empty
+.Ar id
+string allows the interface to connect to any available access points.
+By default the
+.Nm
+driver uses an empty string.
+Note that network ID is synonymous with Extended Service Set ID (ESSID).
+.It Fl nwid
+Set the network ID to the empty string to allow the interface to connect
+to any available access point.
+.It Cm nwkey Ar key
+Enable WEP encryption using the specified
+.Ar key .
+The
+.Ar key
+can either be a string, a series of hexadecimal digits (preceded by
+.Sq 0x ) ,
+or a set of keys of the form
+.Dq n:k1,k2,k3,k4 ,
+where
+.Sq n
+specifies which of the keys will be used for transmitted packets,
+and the four keys,
+.Dq k1
+through
+.Dq k4 ,
+are configured as WEP keys.
+If a set of keys is specified, a comma
+.Pq Sq \&,
+within the key must be escaped with a backslash.
+Note that if multiple keys are used, their order must be the same within
+the network.
+.Nm
+is capable of using both 40-bit (5 characters or 10 hexadecimal digits)
+or 104-bit (13 characters or 26 hexadecimal digits) keys.
+.It Fl nwkey
+Disable WEP encryption.
+This is the default mode of operation.
+.El
+.Sh FILES
+The driver needs at least version 4.44.1.18 of the following firmware file,
+which is loaded when an interface is brought up:
+.Pp
+.Bl -tag -width Ds -offset indent -compact
+.It Pa /etc/firmware/iwn-4965agn
+.El
+.Pp
+This firmware file is not free because Intel refuses to grant
+distribution rights without contractual obligations.
+As a result, even though
+.Ox
+includes the driver, the firmware file cannot be included and
+users have to download this file on their own.
+The official person to state your views to about this issue is
+majid.awad@intel.com.
+.Pp
+A prepackaged version of the firmware, designed to be used with
+.Xr pkg_add 1 ,
+can be found at:
+.Pp
+.Pa http://damien.bergamini.free.fr/packages/openbsd/iwn-firmware-4.44.1.18.tgz
+.Sh EXAMPLES
+The following
+.Xr hostname.if 5
+example configures iwn0 to join whatever network is available on boot,
+using WEP key
+.Dq 0x1deadbeef1 ,
+channel 11, obtaining an IP address using DHCP:
+.Bd -literal -offset indent
+dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11
+.Ed
+.Pp
+Configure iwn0 for WEP, using hex key
+.Dq 0x1deadbeef1 :
+.Bd -literal -offset indent
+# ifconfig iwn0 nwkey 0x1deadbeef1
+.Ed
+.Pp
+Return iwn0 to its default settings:
+.Bd -literal -offset indent
+# ifconfig iwn0 -bssid -chan media autoselect \e
+	nwid "" -nwkey
+.Ed
+.Pp
+Join an existing BSS network,
+.Dq my_net :
+.Bd -literal -offset indent
+# ifconfig iwn0 192.168.1.1 netmask 0xffffff00 nwid my_net
+.Ed
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "iwn%d: device timeout"
+A frame dispatched to the hardware for transmission did not complete in time.
+The driver will reset the hardware.
+This should not happen.
+.It "iwn%d: fatal firmware error"
+For some reason, the firmware crashed.
+The driver will reset the hardware.
+This should not happen.
+.It "iwn%d: radio is disabled by hardware switch"
+The radio transmitter is off and thus no packet can go out.
+The driver will reset the hardware.
+Make sure the laptop radio switch is on.
+.It "iwn%d: error %d, could not read firmware %s"
+For some reason, the driver was unable to read the firmware image from the
+filesystem.
+The file might be missing or corrupted.
+.It "iwn%d: firmware file too short: %d bytes"
+The firmware image is corrupted and can't be loaded into the adapter.
+.It "iwn%d: could not load firmware"
+An attempt to load the firmware into the adapter failed.
+The driver will reset the hardware.
+.El
+.Sh SEE ALSO
+.Xr pkg_add 1 ,
+.Xr arp 4 ,
+.Xr ifmedia 4 ,
+.Xr intro 4 ,
+.Xr netintro 4 ,
+.Xr pci 4 ,
+.Xr hostname.if 5 ,
+.Xr ifconfig 8
+.Rs
+.%T The IPW Web Page
+.%O http://damien.bergamini.free.fr/ipw/
+.Re
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Damien Bergamini Aq damien@openbsd.org .