NAME

     wpi — Intel 3945ABG Wireless LAN IEEE 802.11 driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           device wpi
           device wpifw
           device pci
           device wlan
           device wlan_amrr
           device firmware

     Alternatively, to load the driver as a module at boot time, place the following line in
     loader.conf(5):

           if_wpi_load="YES"

DESCRIPTION

     The wpi driver provides support for the Intel 3945ABG Wireless network adapter.  The driver
     supports station, adhoc, adhoc-demo, hostap, and monitor mode operation.  Only one virtual
     interface may be configured at any time.

     The wpi 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
     networks.  It is strongly recommended that WEP not be used as the sole mechanism to secure
     wireless communication, due to serious weaknesses in it.  The wpi driver offloads both
     encryption and decryption of data frames to the hardware for the CCMP cipher.

     This driver requires the firmware built with the wpifw 4 module to work.

     The wpi driver can be configured at runtime with ifconfig(8).

FILES

     /usr/share/doc/legal/intel_wpi.LICENSE  wpi firmware license

EXAMPLES

     Join an existing BSS network (i.e., connect to an access point):

           ifconfig wlan0 create wlandev wpi0 inet 192.168.0.20 \
               netmask 0xffffff00

     Join a specific BSS network with network name “my_net”:

           ifconfig wlan0 create wlandev wpi0 ssid my_net up

     Join a specific BSS network with 64-bit WEP encryption:

           ifconfig wlan0 create wlandev wpi0 ssid my_net \
                   wepmode on wepkey 0x1234567890 weptxkey 1 up

     Create an IBSS network with 128-bit WEP encryption on the channel 4:

           ifconfig wlan0 create wlandev wpi0 wlanmode adhoc ssid my_net \
                   wepmode on wepkey 0x01020304050607080910111213 weptxkey 1 \
                   channel 4

     Join/create an 802.11b IBSS network with network name “my_net”:

           ifconfig wlan0 create wlandev wpi0 wlanmode adhoc
           ifconfig wlan0 inet 192.168.0.22 netmask 0xffffff00 ssid my_net \
                   mode 11b

     Create an 802.11g host-based access point:

           ifconfig wlan0 create wlandev wpi0 wlanmode hostap
           ifconfig wlan0 inet 192.168.0.10 netmask 0xffffff00 ssid my_ap \
                   mode 11g

DIAGNOSTICS

     wpi%d: could not load firmware image '%s'  The driver failed to load the firmware image
     using the firmware(9) subsystem.  Verify the wpifw(4) firmware module is installed.

     wpi%d: %s: timeout waiting for adapter to initialize, error %d  The onboard microcontroller
     failed to initialize in time.  This should not happen.

     wpi%d: %s: could not load boot firmware  An attempt to upload the boot firmware image to the
     onboard microcontroller failed.  This should not happen.

     wpi%d: device timeout  A frame dispatched to the hardware for transmission did not complete
     in time.  The driver will reset the hardware and continue.  This should not happen.

     wpi%d: scan timeout  Firmware scan command response was not received in time.  The driver
     will reset the hardware and continue.  This should not happen.

     wpi%d: fatal firmware error  The onboard microcontroller crashed for some reason.  The
     driver will reset the hardware and continue.  This should not happen.

     wpi%d: RF switch: radio disabled  The hardware switch controlling the radio is currently
     turned off.  Data transmission is not possible in this state.

     wpi%d: can't map mem space  The driver was unable to map the device registers into the host
     address space.  This should not happen.

     wpi%d: can't map interrupt  The driver was unable to allocate an IRQ for the device
     interrupt.  This should not happen.

     wpi%d: can't establish interrupt, error %d  The driver was unable to install the device
     interrupt handler.  This should not happen.

     wpi%d: %s: bus_dmamap_load failed, error %d  The driver was unable to map newly allocated
     mbuf to device visible address space.  Contents of currently received frame will be lost.
     This should not happen.

SEE ALSO

     pci(4), wlan(4), wlan_amrr(4), wlan_ccmp(4), wlan_tkip(4), wlan_wep(4), wlan_xauth(4),
     wpifw(4), hostapd(8), ifconfig(8), wpa_supplicant(8)

AUTHORS

     The original wpi driver was written for OpenBSD by Damien Bergamini
     <damien.bergamini@free.fr>.  Benjamin Close <benjsc@FreeBSD.org> ported wpi to FreeBSD.

CAVEATS

     Hostap mode is not directly supported by the device; it is implemented through IBSS mode (as
     a result, DFS/passive channels are not available in this mode).

     Powersave may be unstable on some networks (results in occasional 'wpi%d: device timeout'
     messages); you can try to disable it to improve device stability.