Intel(R) PRO/Wireless 2100 Driver for Linux in support of:
  
  Intel(R) PRO/Wireless 2100 Network Connection
  
  Copyright (C) 2003-2006, Intel Corporation
  
  README.ipw2100
  
  Version: git-1.1.5
  Date   : January 25, 2006
  
  Index
  -----------------------------------------------
  0. IMPORTANT INFORMATION BEFORE USING THIS DRIVER
  1. Introduction
  2. Release git-1.1.5 Current Features
  3. Command Line Parameters
  4. Sysfs Helper Files
  5. Radio Kill Switch
  6. Dynamic Firmware
  7. Power Management
  8. Support
  9. License
  
  
  0.   IMPORTANT INFORMATION BEFORE USING THIS DRIVER
  -----------------------------------------------
  
  Important Notice FOR ALL USERS OR DISTRIBUTORS!!!!
  
  Intel wireless LAN adapters are engineered, manufactured, tested, and
  quality checked to ensure that they meet all necessary local and
  governmental regulatory agency requirements for the regions that they
  are designated and/or marked to ship into. Since wireless LANs are
  generally unlicensed devices that share spectrum with radars,
  satellites, and other licensed and unlicensed devices, it is sometimes
  necessary to dynamically detect, avoid, and limit usage to avoid
  interference with these devices. In many instances Intel is required to
  provide test data to prove regional and local compliance to regional and
  governmental regulations before certification or approval to use the
  product is granted. Intel's wireless LAN's EEPROM, firmware, and
  software driver are designed to carefully control parameters that affect
  radio operation and to ensure electromagnetic compliance (EMC). These
  parameters include, without limitation, RF power, spectrum usage,
  channel scanning, and human exposure.
  
  For these reasons Intel cannot permit any manipulation by third parties
  of the software provided in binary format with the wireless WLAN
  adapters (e.g., the EEPROM and firmware). Furthermore, if you use any
  patches, utilities, or code with the Intel wireless LAN adapters that
  have been manipulated by an unauthorized party (i.e., patches,
  utilities, or code (including open source code modifications) which have
  not been validated by Intel), (i) you will be solely responsible for
  ensuring the regulatory compliance of the products, (ii) Intel will bear
  no liability, under any theory of liability for any issues associated
  with the modified products, including without limitation, claims under
  the warranty and/or issues arising from regulatory non-compliance, and
  (iii) Intel will not provide or be required to assist in providing
  support to any third parties for such modified products.
  
  Note: Many regulatory agencies consider Wireless LAN adapters to be
  modules, and accordingly, condition system-level regulatory approval
  upon receipt and review of test data documenting that the antennas and
  system configuration do not cause the EMC and radio operation to be
  non-compliant.
  
  The drivers available for download from SourceForge are provided as a
  part of a development project.  Conformance to local regulatory
  requirements is the responsibility of the individual developer.  As
  such, if you are interested in deploying or shipping a driver as part of
  solution intended to be used for purposes other than development, please
  obtain a tested driver from Intel Customer Support at:
  
  http://www.intel.com/support/wireless/sb/CS-006408.htm
  
  1. Introduction
  -----------------------------------------------
  
  This document provides a brief overview of the features supported by the 
  IPW2100 driver project.  The main project website, where the latest 
  development version of the driver can be found, is:
  
  	http://ipw2100.sourceforge.net
  
  There you can find the not only the latest releases, but also information about
  potential fixes and patches, as well as links to the development mailing list
  for the driver project.
  
  
  2. Release git-1.1.5 Current Supported Features
  -----------------------------------------------
  - Managed (BSS) and Ad-Hoc (IBSS)
  - WEP (shared key and open)
  - Wireless Tools support 
  - 802.1x (tested with XSupplicant 1.0.1)
  
  Enabled (but not supported) features:
  - Monitor/RFMon mode
  - WPA/WPA2
  
  The distinction between officially supported and enabled is a reflection
  on the amount of validation and interoperability testing that has been
  performed on a given feature.
  
  
  3. Command Line Parameters
  -----------------------------------------------
  
  If the driver is built as a module, the following optional parameters are used
  by entering them on the command line with the modprobe command using this
  syntax:
  
  	modprobe ipw2100 [<option>=<VAL1><,VAL2>...]
  
  For example, to disable the radio on driver loading, enter:
  
  	modprobe ipw2100 disable=1
  
  The ipw2100 driver supports the following module parameters:
  
  Name		Value		Example:
  debug		0x0-0xffffffff	debug=1024
  mode		0,1,2		mode=1   /* AdHoc */
  channel		int		channel=3 /* Only valid in AdHoc or Monitor */
  associate	boolean		associate=0 /* Do NOT auto associate */
  disable		boolean		disable=1 /* Do not power the HW */
  
  
  4. Sysfs Helper Files
  ---------------------------     
  -----------------------------------------------
  
  There are several ways to control the behavior of the driver.  Many of the 
  general capabilities are exposed through the Wireless Tools (iwconfig).  There
  are a few capabilities that are exposed through entries in the Linux Sysfs.
  
  
  ----- Driver Level ------
  For the driver level files, look in /sys/bus/pci/drivers/ipw2100/
  
    debug_level  
  	
  	This controls the same global as the 'debug' module parameter.  For 
          information on the various debugging levels available, run the 'dvals'
  	script found in the driver source directory.
  
  	NOTE:  'debug_level' is only enabled if CONFIG_IPW2100_DEBUG is turn
  	       on.
  
  ----- Device Level ------
  For the device level files look in
  	
  	/sys/bus/pci/drivers/ipw2100/{PCI-ID}/
  
  For example:
  	/sys/bus/pci/drivers/ipw2100/0000:02:01.0
  
  For the device level files, see /sys/bus/pci/drivers/ipw2100:
  
    rf_kill
  	read - 
  	0 = RF kill not enabled (radio on)
  	1 = SW based RF kill active (radio off)
  	2 = HW based RF kill active (radio off)
  	3 = Both HW and SW RF kill active (radio off)
  	write -
  	0 = If SW based RF kill active, turn the radio back on
  	1 = If radio is on, activate SW based RF kill
  
  	NOTE: If you enable the SW based RF kill and then toggle the HW
    	based RF kill from ON -> OFF -> ON, the radio will NOT come back on
  
  
  5. Radio Kill Switch
  -----------------------------------------------
  Most laptops provide the ability for the user to physically disable the radio.
  Some vendors have implemented this as a physical switch that requires no
  software to turn the radio off and on.  On other laptops, however, the switch
  is controlled through a button being pressed and a software driver then making
  calls to turn the radio off and on.  This is referred to as a "software based
  RF kill switch"
  
  See the Sysfs helper file 'rf_kill' for determining the state of the RF switch
  on your system.
  
  
  6. Dynamic Firmware
  -----------------------------------------------
  As the firmware is licensed under a restricted use license, it can not be 
  included within the kernel sources.  To enable the IPW2100 you will need a 
  firmware image to load into the wireless NIC's processors.
  
  You can obtain these images from <http://ipw2100.sf.net/firmware.php>.
  
  See INSTALL for instructions on installing the firmware.
  
  
  7. Power Management
  -----------------------------------------------
  The IPW2100 supports the configuration of the Power Save Protocol 
  through a private wireless extension interface.  The IPW2100 supports 
  the following different modes:
  
  	off	No power management.  Radio is always on.
  	on	Automatic power management
  	1-5	Different levels of power management.  The higher the 
  		number the greater the power savings, but with an impact to 
  		packet latencies. 
  
  Power management works by powering down the radio after a certain 
  interval of time has passed where no packets are passed through the 
  radio.  Once powered down, the radio remains in that state for a given 
  period of time.  For higher power savings, the interval between last 
  packet processed to sleep is shorter and the sleep period is longer.
  
  When the radio is asleep, the access point sending data to the station 
  must buffer packets at the AP until the station wakes up and requests 
  any buffered packets.  If you have an AP that does not correctly support 
  the PSP protocol you may experience packet loss or very poor performance 
  while power management is enabled.  If this is the case, you will need 
  to try and find a firmware update for your AP, or disable power 
  management (via `iwconfig eth1 power off`)
  
  To configure the power level on the IPW2100 you use a combination of 
  iwconfig and iwpriv.  iwconfig is used to turn power management on, off, 
  and set it to auto.
  
  	iwconfig eth1 power off    Disables radio power down
  	iwconfig eth1 power on     Enables radio power management to 
  				   last set level (defaults to AUTO)
  	iwpriv eth1 set_power 0    Sets power level to AUTO and enables 
  				   power management if not previously 
  				   enabled.
  	iwpriv eth1 set_power 1-5  Set the power level as specified, 
  				   enabling power management if not 
  				   previously enabled.
  
  You can view the current power level setting via:
  	
  	iwpriv eth1 get_power
  
  It will return the current period or timeout that is configured as a string
  in the form of xxxx/yyyy (z) where xxxx is the timeout interval (amount of
  time after packet processing), yyyy is the period to sleep (amount of time to 
  wait before powering the radio and querying the access point for buffered
  packets), and z is the 'power level'.  If power management is turned off the
  xxxx/yyyy will be replaced with 'off' -- the level reported will be the active
  level if `iwconfig eth1 power on` is invoked.
  
  
  8. Support
  -----------------------------------------------
  
  For general development information and support,
  go to:
  	
      http://ipw2100.sf.net/
  
  The ipw2100 1.1.0 driver and firmware can be downloaded from:  
  
      http://support.intel.com
  
  For installation support on the ipw2100 1.1.0 driver on Linux kernels 
  2.6.8 or greater, email support is available from:  
  
      http://supportmail.intel.com
  
  9. License
  -----------------------------------------------
  
    Copyright(c) 2003 - 2006 Intel Corporation. All rights reserved.
  
    This program is free software; you can redistribute it and/or modify it 
    under the terms of the GNU General Public License (version 2) as 
    published by the Free Software Foundation.
    
    This program is distributed in the hope that it will be useful, but WITHOUT 
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
    more details.
    
    You should have received a copy of the GNU General Public License along with
    this program; if not, write to the Free Software Foundation, Inc., 59 
    Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    
    The full GNU General Public License is included in this distribution in the
    file called LICENSE.
    
    License Contact Information:
    James P. Ketrenos <ipw2100-admin@linux.intel.com>
    Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497