473 lines
16 KiB
Plaintext
473 lines
16 KiB
Plaintext
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Intel(R) PRO/Wireless 2915ABG Driver for Linux in support of:
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Intel(R) PRO/Wireless 2200BG Network Connection
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Intel(R) PRO/Wireless 2915ABG Network Connection
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Note: The Intel(R) PRO/Wireless 2915ABG Driver for Linux and Intel(R)
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PRO/Wireless 2200BG Driver for Linux is a unified driver that works on
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both hardware adapters listed above. In this document the Intel(R)
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PRO/Wireless 2915ABG Driver for Linux will be used to reference the
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unified driver.
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Copyright (C) 2004-2006, Intel Corporation
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README.ipw2200
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Version: 1.1.2
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Date : March 30, 2006
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Index
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-----------------------------------------------
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0. IMPORTANT INFORMATION BEFORE USING THIS DRIVER
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1. Introduction
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1.1. Overview of features
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1.2. Module parameters
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1.3. Wireless Extension Private Methods
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1.4. Sysfs Helper Files
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1.5. Supported channels
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2. Ad-Hoc Networking
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3. Interacting with Wireless Tools
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3.1. iwconfig mode
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3.2. iwconfig sens
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4. About the Version Numbers
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5. Firmware installation
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6. Support
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7. License
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0. IMPORTANT INFORMATION BEFORE USING THIS DRIVER
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-----------------------------------------------
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Important Notice FOR ALL USERS OR DISTRIBUTORS!!!!
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Intel wireless LAN adapters are engineered, manufactured, tested, and
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quality checked to ensure that they meet all necessary local and
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governmental regulatory agency requirements for the regions that they
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are designated and/or marked to ship into. Since wireless LANs are
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generally unlicensed devices that share spectrum with radars,
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satellites, and other licensed and unlicensed devices, it is sometimes
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necessary to dynamically detect, avoid, and limit usage to avoid
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interference with these devices. In many instances Intel is required to
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provide test data to prove regional and local compliance to regional and
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governmental regulations before certification or approval to use the
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product is granted. Intel's wireless LAN's EEPROM, firmware, and
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software driver are designed to carefully control parameters that affect
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radio operation and to ensure electromagnetic compliance (EMC). These
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parameters include, without limitation, RF power, spectrum usage,
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channel scanning, and human exposure.
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For these reasons Intel cannot permit any manipulation by third parties
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of the software provided in binary format with the wireless WLAN
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adapters (e.g., the EEPROM and firmware). Furthermore, if you use any
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patches, utilities, or code with the Intel wireless LAN adapters that
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have been manipulated by an unauthorized party (i.e., patches,
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utilities, or code (including open source code modifications) which have
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not been validated by Intel), (i) you will be solely responsible for
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ensuring the regulatory compliance of the products, (ii) Intel will bear
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no liability, under any theory of liability for any issues associated
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with the modified products, including without limitation, claims under
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the warranty and/or issues arising from regulatory non-compliance, and
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(iii) Intel will not provide or be required to assist in providing
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support to any third parties for such modified products.
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Note: Many regulatory agencies consider Wireless LAN adapters to be
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modules, and accordingly, condition system-level regulatory approval
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upon receipt and review of test data documenting that the antennas and
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system configuration do not cause the EMC and radio operation to be
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non-compliant.
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The drivers available for download from SourceForge are provided as a
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part of a development project. Conformance to local regulatory
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requirements is the responsibility of the individual developer. As
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such, if you are interested in deploying or shipping a driver as part of
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solution intended to be used for purposes other than development, please
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obtain a tested driver from Intel Customer Support at:
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http://support.intel.com/support/notebook/sb/CS-006408.htm
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1. Introduction
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-----------------------------------------------
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The following sections attempt to provide a brief introduction to using
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the Intel(R) PRO/Wireless 2915ABG Driver for Linux.
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This document is not meant to be a comprehensive manual on
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understanding or using wireless technologies, but should be sufficient
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to get you moving without wires on Linux.
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For information on building and installing the driver, see the INSTALL
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file.
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1.1. Overview of Features
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-----------------------------------------------
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The current release (1.1.2) supports the following features:
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+ BSS mode (Infrastructure, Managed)
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+ IBSS mode (Ad-Hoc)
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+ WEP (OPEN and SHARED KEY mode)
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+ 802.1x EAP via wpa_supplicant and xsupplicant
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+ Wireless Extension support
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+ Full B and G rate support (2200 and 2915)
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+ Full A rate support (2915 only)
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+ Transmit power control
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+ S state support (ACPI suspend/resume)
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The following features are currently enabled, but not officially
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supported:
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+ WPA
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+ long/short preamble support
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+ Monitor mode (aka RFMon)
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The distinction between officially supported and enabled is a reflection
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on the amount of validation and interoperability testing that has been
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performed on a given feature.
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1.2. Command Line Parameters
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-----------------------------------------------
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Like many modules used in the Linux kernel, the Intel(R) PRO/Wireless
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2915ABG Driver for Linux allows configuration options to be provided
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as module parameters. The most common way to specify a module parameter
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is via the command line.
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The general form is:
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% modprobe ipw2200 parameter=value
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Where the supported parameter are:
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associate
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Set to 0 to disable the auto scan-and-associate functionality of the
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driver. If disabled, the driver will not attempt to scan
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for and associate to a network until it has been configured with
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one or more properties for the target network, for example configuring
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the network SSID. Default is 0 (do not auto-associate)
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Example: % modprobe ipw2200 associate=0
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auto_create
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Set to 0 to disable the auto creation of an Ad-Hoc network
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matching the channel and network name parameters provided.
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Default is 1.
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channel
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channel number for association. The normal method for setting
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the channel would be to use the standard wireless tools
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(i.e. `iwconfig eth1 channel 10`), but it is useful sometimes
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to set this while debugging. Channel 0 means 'ANY'
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debug
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If using a debug build, this is used to control the amount of debug
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info is logged. See the 'dvals' and 'load' script for more info on
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how to use this (the dvals and load scripts are provided as part
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of the ipw2200 development snapshot releases available from the
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SourceForge project at http://ipw2200.sf.net)
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led
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Can be used to turn on experimental LED code.
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0 = Off, 1 = On. Default is 0.
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mode
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Can be used to set the default mode of the adapter.
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0 = Managed, 1 = Ad-Hoc, 2 = Monitor
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1.3. Wireless Extension Private Methods
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-----------------------------------------------
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As an interface designed to handle generic hardware, there are certain
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capabilities not exposed through the normal Wireless Tool interface. As
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such, a provision is provided for a driver to declare custom, or
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private, methods. The Intel(R) PRO/Wireless 2915ABG Driver for Linux
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defines several of these to configure various settings.
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The general form of using the private wireless methods is:
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% iwpriv $IFNAME method parameters
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Where $IFNAME is the interface name the device is registered with
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(typically eth1, customized via one of the various network interface
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name managers, such as ifrename)
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The supported private methods are:
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get_mode
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Can be used to report out which IEEE mode the driver is
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configured to support. Example:
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% iwpriv eth1 get_mode
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eth1 get_mode:802.11bg (6)
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set_mode
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Can be used to configure which IEEE mode the driver will
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support.
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Usage:
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% iwpriv eth1 set_mode {mode}
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Where {mode} is a number in the range 1-7:
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1 802.11a (2915 only)
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2 802.11b
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3 802.11ab (2915 only)
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4 802.11g
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5 802.11ag (2915 only)
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6 802.11bg
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7 802.11abg (2915 only)
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get_preamble
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Can be used to report configuration of preamble length.
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set_preamble
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Can be used to set the configuration of preamble length:
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Usage:
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% iwpriv eth1 set_preamble {mode}
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Where {mode} is one of:
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1 Long preamble only
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0 Auto (long or short based on connection)
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1.4. Sysfs Helper Files:
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-----------------------------------------------
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The Linux kernel provides a pseudo file system that can be used to
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access various components of the operating system. The Intel(R)
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PRO/Wireless 2915ABG Driver for Linux exposes several configuration
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parameters through this mechanism.
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An entry in the sysfs can support reading and/or writing. You can
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typically query the contents of a sysfs entry through the use of cat,
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and can set the contents via echo. For example:
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% cat /sys/bus/pci/drivers/ipw2200/debug_level
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Will report the current debug level of the driver's logging subsystem
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(only available if CONFIG_IPW2200_DEBUG was configured when the driver
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was built).
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You can set the debug level via:
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% echo $VALUE > /sys/bus/pci/drivers/ipw2200/debug_level
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Where $VALUE would be a number in the case of this sysfs entry. The
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input to sysfs files does not have to be a number. For example, the
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firmware loader used by hotplug utilizes sysfs entries for transfering
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the firmware image from user space into the driver.
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The Intel(R) PRO/Wireless 2915ABG Driver for Linux exposes sysfs entries
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at two levels -- driver level, which apply to all instances of the driver
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(in the event that there are more than one device installed) and device
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level, which applies only to the single specific instance.
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1.4.1 Driver Level Sysfs Helper Files
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-----------------------------------------------
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For the driver level files, look in /sys/bus/pci/drivers/ipw2200/
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debug_level
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This controls the same global as the 'debug' module parameter
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1.4.2 Device Level Sysfs Helper Files
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-----------------------------------------------
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For the device level files, look in
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/sys/bus/pci/drivers/ipw2200/{PCI-ID}/
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For example:
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/sys/bus/pci/drivers/ipw2200/0000:02:01.0
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For the device level files, see /sys/bus/pci/drivers/ipw2200:
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rf_kill
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read -
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0 = RF kill not enabled (radio on)
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1 = SW based RF kill active (radio off)
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2 = HW based RF kill active (radio off)
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3 = Both HW and SW RF kill active (radio off)
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write -
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0 = If SW based RF kill active, turn the radio back on
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1 = If radio is on, activate SW based RF kill
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NOTE: If you enable the SW based RF kill and then toggle the HW
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based RF kill from ON -> OFF -> ON, the radio will NOT come back on
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ucode
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read-only access to the ucode version number
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led
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read -
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0 = LED code disabled
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1 = LED code enabled
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write -
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0 = Disable LED code
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1 = Enable LED code
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NOTE: The LED code has been reported to hang some systems when
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running ifconfig and is therefore disabled by default.
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1.5. Supported channels
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-----------------------------------------------
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Upon loading the Intel(R) PRO/Wireless 2915ABG Driver for Linux, a
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message stating the detected geography code and the number of 802.11
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channels supported by the card will be displayed in the log.
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The geography code corresponds to a regulatory domain as shown in the
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table below.
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Supported channels
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Code Geography 802.11bg 802.11a
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--- Restricted 11 0
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ZZF Custom US/Canada 11 8
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ZZD Rest of World 13 0
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ZZA Custom USA & Europe & High 11 13
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ZZB Custom NA & Europe 11 13
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ZZC Custom Japan 11 4
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ZZM Custom 11 0
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ZZE Europe 13 19
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ZZJ Custom Japan 14 4
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ZZR Rest of World 14 0
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ZZH High Band 13 4
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ZZG Custom Europe 13 4
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ZZK Europe 13 24
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ZZL Europe 11 13
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2. Ad-Hoc Networking
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-----------------------------------------------
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When using a device in an Ad-Hoc network, it is useful to understand the
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sequence and requirements for the driver to be able to create, join, or
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merge networks.
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The following attempts to provide enough information so that you can
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have a consistent experience while using the driver as a member of an
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Ad-Hoc network.
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2.1. Joining an Ad-Hoc Network
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-----------------------------------------------
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The easiest way to get onto an Ad-Hoc network is to join one that
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already exists.
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2.2. Creating an Ad-Hoc Network
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-----------------------------------------------
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An Ad-Hoc networks is created using the syntax of the Wireless tool.
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For Example:
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iwconfig eth1 mode ad-hoc essid testing channel 2
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2.3. Merging Ad-Hoc Networks
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3. Interaction with Wireless Tools
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-----------------------------------------------
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3.1 iwconfig mode
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-----------------------------------------------
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When configuring the mode of the adapter, all run-time configured parameters
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are reset to the value used when the module was loaded. This includes
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channels, rates, ESSID, etc.
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3.2 iwconfig sens
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-----------------------------------------------
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The 'iwconfig ethX sens XX' command will not set the signal sensitivity
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threshold, as described in iwconfig documentation, but rather the number
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of consecutive missed beacons that will trigger handover, i.e. roaming
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to another access point. At the same time, it will set the disassociation
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threshold to 3 times the given value.
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4. About the Version Numbers
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-----------------------------------------------
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Due to the nature of open source development projects, there are
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frequently changes being incorporated that have not gone through
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a complete validation process. These changes are incorporated into
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development snapshot releases.
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Releases are numbered with a three level scheme:
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major.minor.development
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Any version where the 'development' portion is 0 (for example
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1.0.0, 1.1.0, etc.) indicates a stable version that will be made
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available for kernel inclusion.
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Any version where the 'development' portion is not a 0 (for
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example 1.0.1, 1.1.5, etc.) indicates a development version that is
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being made available for testing and cutting edge users. The stability
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and functionality of the development releases are not know. We make
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efforts to try and keep all snapshots reasonably stable, but due to the
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frequency of their release, and the desire to get those releases
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available as quickly as possible, unknown anomalies should be expected.
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The major version number will be incremented when significant changes
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are made to the driver. Currently, there are no major changes planned.
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5. Firmware installation
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----------------------------------------------
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The driver requires a firmware image, download it and extract the
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files under /lib/firmware (or wherever your hotplug's firmware.agent
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will look for firmware files)
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The firmware can be downloaded from the following URL:
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http://ipw2200.sf.net/
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6. Support
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-----------------------------------------------
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For direct support of the 1.0.0 version, you can contact
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http://supportmail.intel.com, or you can use the open source project
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support.
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For general information and support, go to:
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http://ipw2200.sf.net/
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7. License
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-----------------------------------------------
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Copyright(c) 2003 - 2006 Intel Corporation. All rights reserved.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59
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Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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The full GNU General Public License is included in this distribution in the
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file called LICENSE.
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Contact Information:
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James P. Ketrenos <ipw2100-admin@linux.intel.com>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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