UPGT(4) BSD Kernel Interfaces Manual UPGT(4)
upgt -- Conexant/Intersil PrismGT SoftMAC USB IEEE 802.11b/g wireless network device
upgt* at uhub? port ?
The upgt driver supports the USB 2.0 Conexant/Intersil PrismGT series wireless adapters
based on the GW3887 chipset.
These are the modes the upgt driver can operate in:
BSS mode Also known as infrastructure mode, this is used when associating with an
access point, through which all traffic passes. This mode is the default.
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.
The upgt driver can be configured to use Wired Equivalent Privacy (WEP) or Wi-Fi Protected
Access (WPA-PSK and WPA2-PSK). WPA is the de facto encryption standard for wireless net-
works. It is strongly recommended that WEP not be used as the sole mechanism to secure
wireless communication, due to serious weaknesses in it. The upgt driver relies on the
software 802.11 stack for both encryption and decryption of data frames.
The upgt driver can be configured at runtime with ifconfig(8) or on boot with
The driver needs a firmware file which is loaded when an interface is brought up:
Currently these firmware files can not be included in NetBSD base system. Please download
these files and put them into the above firmware directory.
A tar archive file that includes upgt-gw3887 firmware can be found at:
The following adapters should work:
Belkin F5D7050 (version 1000)
Cohiba Proto Board
D-Link DWL-G120 Cohiba
D-Link DWL-G122 rev A2
FSC Connect2Air E-5400 USB D1700
Gigaset USB Adapter 54
Linksys WUSB54G ver 2
SMC EZ ConnectG SMC2862W-G
Spinnaker Proto Board
Thomson SpeedTouch 121g
Willcom / Sharp WS003SH/WS004SH smart phone internal wireless LAN
The following ifconfig.if(5) example configures upgt0 to join whatever network is available
on boot, using WEP key ``0x1deadbeef1'', channel 11, obtaining an IP address using
ssid 'my network' nwkey 0x1deadbeef1 chan 11
Join an existing BSS network, ``my_net'':
# ifconfig upgt0 192.168.1.1 netmask 0xffffff00 nwid my_net
arp(4), ifmedia(4), intro(4), netintro(4), usb(4), ifconfig.if(5), ifconfig(8)
The upgt driver first appeared in OpenBSD 4.3. It was ported to NetBSD by FUKAUMI Naoki and
first appeared in NetBSD 6.0.
The upgt driver was written by Marcus Glocker <firstname.lastname@example.org>.
The hardware specification was reverse engineered by the people at http://www.prism54.org/.
The upgt driver just supports the USB 2.0 devices (GW3887 chipset) but not the USB 1.0
devices containing the NET2280, ISL3880, and ISL3886 chipsets. Some further efforts would
be necessary to add USB 1.0 support to the driver.
BSD July 4, 2010 BSD