Documentation/networking/README.ipw2200 - arm/linux - Git at Google


 Intel(R) PRO/Wireless 2915ABG Driver for Linux in support of:

 Intel(R) PRO/Wireless 2200BG Network Connection
 Intel(R) PRO/Wireless 2915ABG Network Connection

 Note: The Intel(R) PRO/Wireless 2915ABG Driver for Linux and Intel(R)
 PRO/Wireless 2200BG Driver for Linux is a unified driver that works on
 both hardware adapters listed above. In this document the Intel(R)
 PRO/Wireless 2915ABG Driver for Linux will be used to reference the
 unified driver.

 Copyright (C) 2004-2006, Intel Corporation

 README.ipw2200

 Version: 1.1.2
 Date   : March 30, 2006


 Index
 -----------------------------------------------
 0.   IMPORTANT INFORMATION BEFORE USING THIS DRIVER
 1.   Introduction
 1.1. Overview of features
 1.2. Module parameters
 1.3. Wireless Extension Private Methods
 1.4. Sysfs Helper Files
 1.5. Supported channels
 2.   Ad-Hoc Networking
 3.   Interacting with Wireless Tools
 3.1. iwconfig mode
 3.2. iwconfig sens
 4.   About the Version Numbers
 5.   Firmware installation
 6.   Support
 7.   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://support.intel.com


 1.   Introduction
 -----------------------------------------------
 The following sections attempt to provide a brief introduction to using
 the Intel(R) PRO/Wireless 2915ABG Driver for Linux.

 This document is not meant to be a comprehensive manual on
 understanding or using wireless technologies, but should be sufficient
 to get you moving without wires on Linux.

 For information on building and installing the driver, see the INSTALL
 file.


 1.1. Overview of Features
 -----------------------------------------------
 The current release (1.1.2) supports the following features:

 + BSS mode (Infrastructure, Managed)
 + IBSS mode (Ad-Hoc)
 + WEP (OPEN and SHARED KEY mode)
 + 802.1x EAP via wpa_supplicant and xsupplicant
 + Wireless Extension support
 + Full B and G rate support (2200 and 2915)
 + Full A rate support (2915 only)
 + Transmit power control
 + S state support (ACPI suspend/resume)

 The following features are currently enabled, but not officially
 supported:

 + WPA
 + long/short preamble support
 + Monitor mode (aka RFMon)

 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.


 1.2. Command Line Parameters
 -----------------------------------------------

 Like many modules used in the Linux kernel, the Intel(R) PRO/Wireless
 2915ABG Driver for Linux allows configuration options to be provided
 as module parameters.  The most common way to specify a module parameter
 is via the command line.

 The general form is:

 % modprobe ipw2200 parameter=value

 Where the supported parameter are:

   associate
 	Set to 0 to disable the auto scan-and-associate functionality of the
 	driver.  If disabled, the driver will not attempt to scan
 	for and associate to a network until it has been configured with
 	one or more properties for the target network, for example configuring
 	the network SSID.  Default is 0 (do not auto-associate)

 	Example: % modprobe ipw2200 associate=0

   auto_create
 	Set to 0 to disable the auto creation of an Ad-Hoc network
 	matching the channel and network name parameters provided.
 	Default is 1.

   channel
 	channel number for association.  The normal method for setting
         the channel would be to use the standard wireless tools
         (i.e. `iwconfig eth1 channel 10`), but it is useful sometimes
 	to set this while debugging.  Channel 0 means 'ANY'

   debug
 	If using a debug build, this is used to control the amount of debug
 	info is logged.  See the 'dvals' and 'load' script for more info on
 	how to use this (the dvals and load scripts are provided as part
 	of the ipw2200 development snapshot releases available from the
 	SourceForge project at http://ipw2200.sf.net)

   led
 	Can be used to turn on experimental LED code.
 	0 = Off, 1 = On.  Default is 0.

   mode
 	Can be used to set the default mode of the adapter.
 	0 = Managed, 1 = Ad-Hoc, 2 = Monitor


 1.3. Wireless Extension Private Methods
 -----------------------------------------------

 As an interface designed to handle generic hardware, there are certain
 capabilities not exposed through the normal Wireless Tool interface.  As
 such, a provision is provided for a driver to declare custom, or
 private, methods.  The Intel(R) PRO/Wireless 2915ABG Driver for Linux
 defines several of these to configure various settings.

 The general form of using the private wireless methods is:

 	% iwpriv $IFNAME method parameters

 Where $IFNAME is the interface name the device is registered with
 (typically eth1, customized via one of the various network interface
 name managers, such as ifrename)

 The supported private methods are:

   get_mode
 	Can be used to report out which IEEE mode the driver is
 	configured to support.  Example:

 	% iwpriv eth1 get_mode
 	eth1	get_mode:802.11bg (6)

   set_mode
 	Can be used to configure which IEEE mode the driver will
 	support.

 	Usage:
 	% iwpriv eth1 set_mode {mode}
 	Where {mode} is a number in the range 1-7:
 	1	802.11a (2915 only)
 	2	802.11b
 	3	802.11ab (2915 only)
 	4	802.11g
 	5	802.11ag (2915 only)
 	6	802.11bg
 	7	802.11abg (2915 only)

   get_preamble
 	Can be used to report configuration of preamble length.

   set_preamble
 	Can be used to set the configuration of preamble length:

 	Usage:
 	% iwpriv eth1 set_preamble {mode}
 	Where {mode} is one of:
 	1	Long preamble only
 	0	Auto (long or short based on connection)


 1.4. Sysfs Helper Files:
 -----------------------------------------------

 The Linux kernel provides a pseudo file system that can be used to
 access various components of the operating system.  The Intel(R)
 PRO/Wireless 2915ABG Driver for Linux exposes several configuration
 parameters through this mechanism.

 An entry in the sysfs can support reading and/or writing.  You can
 typically query the contents of a sysfs entry through the use of cat,
 and can set the contents via echo.  For example:

 % cat /sys/bus/pci/drivers/ipw2200/debug_level

 Will report the current debug level of the driver's logging subsystem
 (only available if CONFIG_IPW2200_DEBUG was configured when the driver
 was built).

 You can set the debug level via:

 % echo $VALUE > /sys/bus/pci/drivers/ipw2200/debug_level

 Where $VALUE would be a number in the case of this sysfs entry.  The
 input to sysfs files does not have to be a number.  For example, the
 firmware loader used by hotplug utilizes sysfs entries for transfering
 the firmware image from user space into the driver.

 The Intel(R) PRO/Wireless 2915ABG Driver for Linux exposes sysfs entries
 at two levels -- driver level, which apply to all instances of the driver
 (in the event that there are more than one device installed) and device
 level, which applies only to the single specific instance.


 1.4.1 Driver Level Sysfs Helper Files
 -----------------------------------------------

 For the driver level files, look in /sys/bus/pci/drivers/ipw2200/

   debug_level

 	This controls the same global as the 'debug' module parameter


 1.4.2 Device Level Sysfs Helper Files
 -----------------------------------------------

 For the device level files, look in

 	/sys/bus/pci/drivers/ipw2200/{PCI-ID}/

 For example:
 	/sys/bus/pci/drivers/ipw2200/0000:02:01.0

 For the device level files, see /sys/bus/pci/drivers/ipw2200:

   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

   ucode
 	read-only access to the ucode version number

   led
 	read -
 	0 = LED code disabled
 	1 = LED code enabled
 	write -
 	0 = Disable LED code
 	1 = Enable LED code

 	NOTE: The LED code has been reported to hang some systems when
 	running ifconfig and is therefore disabled by default.


 1.5. Supported channels
 -----------------------------------------------

 Upon loading the Intel(R) PRO/Wireless 2915ABG Driver for Linux, a
 message stating the detected geography code and the number of 802.11
 channels supported by the card will be displayed in the log.

 The geography code corresponds to a regulatory domain as shown in the
 table below.

 					  Supported channels
 Code	Geography			802.11bg	802.11a

 ---	Restricted			11 	 	 0
 ZZF	Custom US/Canada		11	 	 8
 ZZD	Rest of World			13	 	 0
 ZZA	Custom USA & Europe & High	11		13
 ZZB	Custom NA & Europe    		11		13
 ZZC	Custom Japan			11	 	 4
 ZZM	Custom 				11	 	 0
 ZZE	Europe				13		19
 ZZJ	Custom Japan			14	 	 4
 ZZR	Rest of World			14	 	 0
 ZZH	High Band			13	 	 4
 ZZG	Custom Europe			13	 	 4
 ZZK	Europe 				13		24
 ZZL	Europe				11		13


 2.   Ad-Hoc Networking
 -----------------------------------------------

 When using a device in an Ad-Hoc network, it is useful to understand the
 sequence and requirements for the driver to be able to create, join, or
 merge networks.

 The following attempts to provide enough information so that you can
 have a consistent experience while using the driver as a member of an
 Ad-Hoc network.

 2.1. Joining an Ad-Hoc Network
 -----------------------------------------------

 The easiest way to get onto an Ad-Hoc network is to join one that
 already exists.

 2.2. Creating an Ad-Hoc Network
 -----------------------------------------------

 An Ad-Hoc networks is created using the syntax of the Wireless tool.

 For Example:
 iwconfig eth1 mode ad-hoc essid testing channel 2

 2.3. Merging Ad-Hoc Networks
 -----------------------------------------------


 3.  Interaction with Wireless Tools
 -----------------------------------------------

 3.1 iwconfig mode
 -----------------------------------------------

 When configuring the mode of the adapter, all run-time configured parameters
 are reset to the value used when the module was loaded.  This includes
 channels, rates, ESSID, etc.

 3.2 iwconfig sens
 -----------------------------------------------

 The 'iwconfig ethX sens XX' command will not set the signal sensitivity
 threshold, as described in iwconfig documentation, but rather the number
 of consecutive missed beacons that will trigger handover, i.e. roaming
 to another access point. At the same time, it will set the disassociation
 threshold to 3 times the given value.


 4.   About the Version Numbers
 -----------------------------------------------

 Due to the nature of open source development projects, there are
 frequently changes being incorporated that have not gone through
 a complete validation process.  These changes are incorporated into
 development snapshot releases.

 Releases are numbered with a three level scheme:

 	major.minor.development

 Any version where the 'development' portion is 0 (for example
 1.0.0, 1.1.0, etc.) indicates a stable version that will be made
 available for kernel inclusion.

 Any version where the 'development' portion is not a 0 (for
 example 1.0.1, 1.1.5, etc.) indicates a development version that is
 being made available for testing and cutting edge users.  The stability
 and functionality of the development releases are not know.  We make
 efforts to try and keep all snapshots reasonably stable, but due to the
 frequency of their release, and the desire to get those releases
 available as quickly as possible, unknown anomalies should be expected.

 The major version number will be incremented when significant changes
 are made to the driver.  Currently, there are no major changes planned.

 5.  Firmware installation
 ----------------------------------------------

 The driver requires a firmware image, download it and extract the
 files under /lib/firmware (or wherever your hotplug's firmware.agent
 will look for firmware files)

 The firmware can be downloaded from the following URL:

     http://ipw2200.sf.net/


 6.  Support
 -----------------------------------------------

 For direct support of the 1.0.0 version, you can contact
 http://supportmail.intel.com, or you can use the open source project
 support.

 For general information and support, go to:

     http://ipw2200.sf.net/


 7.  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.

   Contact Information:
   James P. Ketrenos <ipw2100-admin@linux.intel.com>
   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

	Intel(R) PRO/Wireless 2915ABG Driver for Linux in support of:

	Intel(R) PRO/Wireless 2200BG Network Connection
	Intel(R) PRO/Wireless 2915ABG Network Connection

	Note: The Intel(R) PRO/Wireless 2915ABG Driver for Linux and Intel(R)
	PRO/Wireless 2200BG Driver for Linux is a unified driver that works on
	both hardware adapters listed above. In this document the Intel(R)
	PRO/Wireless 2915ABG Driver for Linux will be used to reference the
	unified driver.

	Copyright (C) 2004-2006, Intel Corporation

	README.ipw2200

	Version: 1.1.2
	Date : March 30, 2006


	Index
	-----------------------------------------------
	0. IMPORTANT INFORMATION BEFORE USING THIS DRIVER
	1. Introduction
	1.1. Overview of features
	1.2. Module parameters
	1.3. Wireless Extension Private Methods
	1.4. Sysfs Helper Files
	1.5. Supported channels
	2. Ad-Hoc Networking
	3. Interacting with Wireless Tools
	3.1. iwconfig mode
	3.2. iwconfig sens
	4. About the Version Numbers
	5. Firmware installation
	6. Support
	7. 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://support.intel.com


	1. Introduction
	-----------------------------------------------
	The following sections attempt to provide a brief introduction to using
	the Intel(R) PRO/Wireless 2915ABG Driver for Linux.

	This document is not meant to be a comprehensive manual on
	understanding or using wireless technologies, but should be sufficient
	to get you moving without wires on Linux.

	For information on building and installing the driver, see the INSTALL
	file.


	1.1. Overview of Features
	-----------------------------------------------
	The current release (1.1.2) supports the following features:

	+ BSS mode (Infrastructure, Managed)
	+ IBSS mode (Ad-Hoc)
	+ WEP (OPEN and SHARED KEY mode)
	+ 802.1x EAP via wpa_supplicant and xsupplicant
	+ Wireless Extension support
	+ Full B and G rate support (2200 and 2915)
	+ Full A rate support (2915 only)
	+ Transmit power control
	+ S state support (ACPI suspend/resume)

	The following features are currently enabled, but not officially
	supported:

	+ WPA
	+ long/short preamble support
	+ Monitor mode (aka RFMon)

	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.



	1.2. Command Line Parameters
	-----------------------------------------------

	Like many modules used in the Linux kernel, the Intel(R) PRO/Wireless
	2915ABG Driver for Linux allows configuration options to be provided
	as module parameters. The most common way to specify a module parameter
	is via the command line.

	The general form is:

	% modprobe ipw2200 parameter=value

	Where the supported parameter are:

	associate
	Set to 0 to disable the auto scan-and-associate functionality of the
	driver. If disabled, the driver will not attempt to scan
	for and associate to a network until it has been configured with
	one or more properties for the target network, for example configuring
	the network SSID. Default is 0 (do not auto-associate)

	Example: % modprobe ipw2200 associate=0

	auto_create
	Set to 0 to disable the auto creation of an Ad-Hoc network
	matching the channel and network name parameters provided.
	Default is 1.

	channel
	channel number for association. The normal method for setting
	the channel would be to use the standard wireless tools
	(i.e. `iwconfig eth1 channel 10`), but it is useful sometimes
	to set this while debugging. Channel 0 means 'ANY'

	debug
	If using a debug build, this is used to control the amount of debug
	info is logged. See the 'dvals' and 'load' script for more info on
	how to use this (the dvals and load scripts are provided as part
	of the ipw2200 development snapshot releases available from the
	SourceForge project at http://ipw2200.sf.net)

	led
	Can be used to turn on experimental LED code.
	0 = Off, 1 = On. Default is 0.

	mode
	Can be used to set the default mode of the adapter.
	0 = Managed, 1 = Ad-Hoc, 2 = Monitor


	1.3. Wireless Extension Private Methods
	-----------------------------------------------

	As an interface designed to handle generic hardware, there are certain
	capabilities not exposed through the normal Wireless Tool interface. As
	such, a provision is provided for a driver to declare custom, or
	private, methods. The Intel(R) PRO/Wireless 2915ABG Driver for Linux
	defines several of these to configure various settings.

	The general form of using the private wireless methods is:

	% iwpriv $IFNAME method parameters

	Where $IFNAME is the interface name the device is registered with
	(typically eth1, customized via one of the various network interface
	name managers, such as ifrename)

	The supported private methods are:

	get_mode
	Can be used to report out which IEEE mode the driver is
	configured to support. Example:

	% iwpriv eth1 get_mode
	eth1 get_mode:802.11bg (6)

	set_mode
	Can be used to configure which IEEE mode the driver will
	support.

	Usage:
	% iwpriv eth1 set_mode {mode}
	Where {mode} is a number in the range 1-7:
	1 802.11a (2915 only)
	2 802.11b
	3 802.11ab (2915 only)
	4 802.11g
	5 802.11ag (2915 only)
	6 802.11bg
	7 802.11abg (2915 only)

	get_preamble
	Can be used to report configuration of preamble length.

	set_preamble
	Can be used to set the configuration of preamble length:

	Usage:
	% iwpriv eth1 set_preamble {mode}
	Where {mode} is one of:
	1 Long preamble only
	0 Auto (long or short based on connection)


	1.4. Sysfs Helper Files:
	-----------------------------------------------

	The Linux kernel provides a pseudo file system that can be used to
	access various components of the operating system. The Intel(R)
	PRO/Wireless 2915ABG Driver for Linux exposes several configuration
	parameters through this mechanism.

	An entry in the sysfs can support reading and/or writing. You can
	typically query the contents of a sysfs entry through the use of cat,
	and can set the contents via echo. For example:

	% cat /sys/bus/pci/drivers/ipw2200/debug_level

	Will report the current debug level of the driver's logging subsystem
	(only available if CONFIG_IPW2200_DEBUG was configured when the driver
	was built).

	You can set the debug level via:

	% echo $VALUE > /sys/bus/pci/drivers/ipw2200/debug_level

	Where $VALUE would be a number in the case of this sysfs entry. The
	input to sysfs files does not have to be a number. For example, the
	firmware loader used by hotplug utilizes sysfs entries for transfering
	the firmware image from user space into the driver.

	The Intel(R) PRO/Wireless 2915ABG Driver for Linux exposes sysfs entries
	at two levels -- driver level, which apply to all instances of the driver
	(in the event that there are more than one device installed) and device
	level, which applies only to the single specific instance.


	1.4.1 Driver Level Sysfs Helper Files
	-----------------------------------------------

	For the driver level files, look in /sys/bus/pci/drivers/ipw2200/

	debug_level

	This controls the same global as the 'debug' module parameter



	1.4.2 Device Level Sysfs Helper Files
	-----------------------------------------------

	For the device level files, look in

	/sys/bus/pci/drivers/ipw2200/{PCI-ID}/

	For example:
	/sys/bus/pci/drivers/ipw2200/0000:02:01.0

	For the device level files, see /sys/bus/pci/drivers/ipw2200:

	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

	ucode
	read-only access to the ucode version number

	led
	read -
	0 = LED code disabled
	1 = LED code enabled
	write -
	0 = Disable LED code
	1 = Enable LED code

	NOTE: The LED code has been reported to hang some systems when
	running ifconfig and is therefore disabled by default.


	1.5. Supported channels
	-----------------------------------------------

	Upon loading the Intel(R) PRO/Wireless 2915ABG Driver for Linux, a
	message stating the detected geography code and the number of 802.11
	channels supported by the card will be displayed in the log.

	The geography code corresponds to a regulatory domain as shown in the
	table below.

	Supported channels
	Code Geography 802.11bg 802.11a

	--- Restricted 11 0
	ZZF Custom US/Canada 11 8
	ZZD Rest of World 13 0
	ZZA Custom USA & Europe & High 11 13
	ZZB Custom NA & Europe 11 13
	ZZC Custom Japan 11 4
	ZZM Custom 11 0
	ZZE Europe 13 19
	ZZJ Custom Japan 14 4
	ZZR Rest of World 14 0
	ZZH High Band 13 4
	ZZG Custom Europe 13 4
	ZZK Europe 13 24
	ZZL Europe 11 13


	2. Ad-Hoc Networking
	-----------------------------------------------

	When using a device in an Ad-Hoc network, it is useful to understand the
	sequence and requirements for the driver to be able to create, join, or
	merge networks.

	The following attempts to provide enough information so that you can
	have a consistent experience while using the driver as a member of an
	Ad-Hoc network.

	2.1. Joining an Ad-Hoc Network
	-----------------------------------------------

	The easiest way to get onto an Ad-Hoc network is to join one that
	already exists.

	2.2. Creating an Ad-Hoc Network
	-----------------------------------------------

	An Ad-Hoc networks is created using the syntax of the Wireless tool.

	For Example:
	iwconfig eth1 mode ad-hoc essid testing channel 2

	2.3. Merging Ad-Hoc Networks
	-----------------------------------------------


	3. Interaction with Wireless Tools
	-----------------------------------------------

	3.1 iwconfig mode
	-----------------------------------------------

	When configuring the mode of the adapter, all run-time configured parameters
	are reset to the value used when the module was loaded. This includes
	channels, rates, ESSID, etc.

	3.2 iwconfig sens
	-----------------------------------------------

	The 'iwconfig ethX sens XX' command will not set the signal sensitivity
	threshold, as described in iwconfig documentation, but rather the number
	of consecutive missed beacons that will trigger handover, i.e. roaming
	to another access point. At the same time, it will set the disassociation
	threshold to 3 times the given value.


	4. About the Version Numbers
	-----------------------------------------------

	Due to the nature of open source development projects, there are
	frequently changes being incorporated that have not gone through
	a complete validation process. These changes are incorporated into
	development snapshot releases.

	Releases are numbered with a three level scheme:

	major.minor.development

	Any version where the 'development' portion is 0 (for example
	1.0.0, 1.1.0, etc.) indicates a stable version that will be made
	available for kernel inclusion.

	Any version where the 'development' portion is not a 0 (for
	example 1.0.1, 1.1.5, etc.) indicates a development version that is
	being made available for testing and cutting edge users. The stability
	and functionality of the development releases are not know. We make
	efforts to try and keep all snapshots reasonably stable, but due to the
	frequency of their release, and the desire to get those releases
	available as quickly as possible, unknown anomalies should be expected.

	The major version number will be incremented when significant changes
	are made to the driver. Currently, there are no major changes planned.

	5. Firmware installation
	----------------------------------------------

	The driver requires a firmware image, download it and extract the
	files under /lib/firmware (or wherever your hotplug's firmware.agent
	will look for firmware files)

	The firmware can be downloaded from the following URL:

	http://ipw2200.sf.net/


	6. Support
	-----------------------------------------------

	For direct support of the 1.0.0 version, you can contact
	http://supportmail.intel.com, or you can use the open source project
	support.

	For general information and support, go to:

	http://ipw2200.sf.net/


	7. 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.

	Contact Information:
	James P. Ketrenos <ipw2100-admin@linux.intel.com>
	Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497