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+.\" $OpenBSD: zyd.4,v 1.22 2007/05/24 02:49:57 cnst Exp $
+.\" $NetBSD: zyd.4,v 1.1 2007/06/09 11:20:55 kiyohara Exp $
+.\" $FreeBSD$
+.\"
+.\" Copyright (c) 1997, 1998, 1999
+.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\" This product includes software developed by Bill Paul.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+.\" THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd March 7, 2013
+.Dt ZYD 4
+.Os
+.Sh NAME
+.Nm zyd
+.Nd ZyDAS ZD1211/ZD1211B USB IEEE 802.11b/g wireless network device
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device ehci"
+.Cd "device uhci"
+.Cd "device ohci"
+.Cd "device usb"
+.Cd "device zyd"
+.Cd "device wlan"
+.Cd "device wlan_amrr"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+if_zyd_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for wireless network adapters based around
+the ZyDAS ZD1211 and ZD1211B USB chips.
+.Pp
+.Nm
+supports
+.Cm station
+and
+.Cm monitor
+mode operation.
+Only one virtual interface may be configured at any time.
+For more information on configuring this device, see
+.Xr ifconfig 8 .
+.Sh HARDWARE
+The following devices are known to be supported by the
+.Nm
+driver:
+.Pp
+.Bl -tag -width Ds -offset indent -compact
+.It 3COM 3CRUSB10075
+.It Acer WLAN-G-US1
+.It Airlink+ AWLL3025
+.It Airlink 101 AWLL3026
+.It AOpen 802.11g WL54
+.It Asus A9T integrated wireless
+.It Asus WL-159g
+.It Belkin F5D7050 v.4000
+.It Billion BiPAC 3011G
+.It Buffalo WLI-U2-KG54L
+.It CC&C WL-2203B
+.It DrayTek Vigor 550
+.It Edimax EW-7317UG
+.It Edimax EW-7317LDG
+.It Fiberline Networks WL-43OU
+.It iNexQ UR055g
+.It Linksys WUSBF54G
+.It Longshine LCS-8131G3
+.It MSI US54SE
+.It MyTek MWU-201 USB adapter
+.It Philips SNU5600
+.It Planet WL-U356
+.It Planex GW-US54GZ
+.It Planex GW-US54GZL
+.It Planex GW-US54Mini
+.It Safecom SWMULZ-5400
+.It Sagem XG 760A
+.It Sagem XG 76NA
+.It Sandberg Wireless G54 USB
+.It Sitecom WL-113
+.It SMC SMCWUSB-G
+.It Sweex wireless USB 54 Mbps
+.It Tekram/Siemens USB adapter
+.It Telegent TG54USB
+.It Trendnet TEW-424UB rev A
+.It Trendnet TEW-429UB
+.It TwinMOS G240
+.It Unicorn WL-54G
+.It US Robotics 5423
+.It X-Micro XWL-11GUZX
+.It Yakumo QuickWLAN USB
+.It Zonet ZEW2501
+.It ZyXEL ZyAIR G-202
+.It ZyXEL ZyAIR G-220
+.El
+.Sh EXAMPLES
+The following
+example configures zyd0 to join any BSS network using WEP key
+.Dq 0x1deadbeef1 ,
+channel 11:
+.Bd -literal -offset indent
+ifconfig wlan create wlandev zyd0 channel 11 \e
+    wepmode on wepkey 0x1deadbeef1 weptxkey 1 \e
+    inet 192.168.1.1 netmask 255.255.255.0
+.Ed
+.Pp
+Join an existing BSS network,
+.Dq my_net :
+.Bd -literal -offset indent
+ifconfig wlan create wlandev zyd0 192.168.0.2 \e
+    netmask 0xffffff00 ssid my_net
+.Ed
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "zyd%d: could not load firmware (error=%d)"
+An error occurred while attempting to upload the firmware to the onboard
+microcontroller unit.
+.It "zyd%d: could not send command (error=%s)"
+An attempt to send a command to the firmware failed.
+.It "zyd%d: sorry, radio %s is not supported yet"
+Support for the specified radio chip is not yet implemented in the driver.
+The device will not attach.
+.It "zyd%d: device version mismatch: 0x%x (only >= 43.30 supported)"
+Early revisions of the ZD1211 chipset are not supported by this driver.
+The device will not attach.
+.It "zyd%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.
+.El
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr netintro 4 ,
+.Xr usb 4 ,
+.Xr wlan 4 ,
+.Xr wlan_amrr 4 ,
+.Xr wlan_ccmp 4 ,
+.Xr wlan_tkip 4 ,
+.Xr wlan_wep 4 ,
+.Xr ifconfig 8 ,
+.Xr wpa_supplicant 8
+.Sh AUTHORS
+.An -nosplit
+The original
+.Nm
+driver was written by
+.An Florian Stoehr Aq ich@florian-stoehr.de ,
+.An Damien Bergamini Aq damien@openbsd.org ,
+and
+.An Jonathan Gray Aq jsg@openbsd.org .
+.Sh CAVEATS
+The
+.Nm
+driver does not support a lot of the functionality available in the hardware.
+More work is required to properly support the IBSS and power management
+features.