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irattach(8) irattach(8)
NAME
irattach — binds the Linux-IrDA stack to a IrDA port
SYNOPSIS
irattach [<dev>] [-s] [-d dongle] [-v] [-h]
DESCRIPTION
irattach binds the Linux-IrDA stack to an IrDA port. It configures the low level of
the Linux-IrDA stack in the kernel. This step is usually necessary before you (or
applications) can use the higher layer of the IrDA stack.
The irattach command loads the necessary Linux-IrDA driver, which configures the
IrDA hardware, and configures the IrDA stack to operate on the new IrDA port. Mul-
tiple IrDA ports can be activated through multiple irattach commands.
irattach by default uses the irtty driver which connects to the Linux TTY subsystem
and use the standard Linux serial driver. This works well for most machines and
configurations, but limits the baud rate to 115200bps (IrDA SIR mode). The mode of
operation will work with most FIR hardware (as found in laptops - they provide
serial emulation) and most serial dongles (provided the proper dongle type is spec-
ified), making it a safe choice. However, USB dongles and a few FIR hardware don’t
support serial emulation and can’t be used with the irtty driver.
irattach can also use one of the Linux FIR drivers (including USB dongle drivers)
instead of the irtty driver. Most FIR drivers require proper configuration of mod-
ule parameters (this is documented below). FIR drivers allow you to use higher baud
rates (generally up to 4Mbps). In general, Linux FIR support is not as stable and
mature, due to lack of time and documentation.
irattach must be run as root or installed setuid root, as it requires root privi-
leges. If you have compiled the IrDA stack as modules (recommended), then you will
need to edit the /etc/modules.conf file. See the Infrared-HOWTO for details.
OPTIONS
<dev> : this is the name of a TTY, an IrDA interface or IrDA driver. irattach
decides to use the irtty driver or one of the FIR drivers based on this argument.
· TTY name : this is the serial port to be configured using the irtty driver,
such as /dev/ttyS0. irattach will use the irtty driver, so only SIR will be
available. You need to check your serial configuration or BIOS to know which
serial port is the IrDA port that need to be passed to irattach.
· interface name : this is the device name of an IrDA interface, such as irda0.
irattach will use one of the FIR drivers (including USB dongle drivers). The
selected FIR driver must be loaded prior to the call to irattach, or the
proper alias for the device name must be set in /etc/modules.conf.
· module name : this is the name of an FIR driver module, such as nsc-ircc (see
list below). All new IrDA interfaces created after loading the module will be
configured, so this won’t work if the module is already loaded. This feature
is still experimental.
-s : starts discovery of remote IrDA devices (note that the form "-s 1" is no
longer supported)
-v : shows version information (this happens, when no option is given, too)
-h : shows help information.
-d dongle : attaches an additional dongle driver to the IrDA port.
You need a dongle driver if you have an infrared device that connects to your com-
puter’s serial port (normal 9-pin serial port connector). These devices are called
dongles, and can currently be used by any SIR driver (IrTTY or irport). This
option is not compatible with FIR drivers, and only works with the irtty and irport
drivers.
The currently known (serial) dongles are:
· esi Extended Systems JetEye PC ESI-9680
· tekram Tekram IrMate IR-210B dongle
· actisys ACTiSYS IR-220L dongle
· actisys+ ACTiSYS IR-220L+ dongle
· girbil Greenwich GIrBIL dongle
· litelink Parallax LiteLink dongle & Extended Systems JetEye PC ESI-9680B
· airport N.N.
· old_belkin Belkin (old) SmartBeam dongle or any dongle only capable of 9600
bauds
· ep7211 IR port driver for the Cirrus Logic EP7211 processor (ARM based)
· mcp2120 Dongles based on the MCP2120 (Microchip)
· act200l ACTiSYS Ir-200L dongles
· ma600 Mobile Action ma600 dongles
FIR DRIVER MODULES
If you are one of the lucky people which have a FIR chipset or USB dongle that is
supported by one of the Linux-IrDA drivers, you can use irattach with the interface
name of the IrDA port to configure. You will need to configure /etc/conf.modules
appropriately, with at least an alias of irda0 to the driver name, or load the
driver manually beforehand.
You don’t strictly need to use irattach with FIR drivers, you can use modprobe to
load the driver, ifconfig to bring up the interface and set the various sysctl by
hand, but irattach offer a convenient way to do it.
Of course, you need to know which FIR driver applies to your hardware. You may use
findchip to get information about the FIR chip. If this doesn’t help, the Infrared-
HOWTO shows other means to retrieve these data.
Also, you often need to configure the Linux-serial driver to ignore the IrDA port,
otherwise both drivers will conflict. This can usually be done with setserial
/dev/ttySx uart none.
The currently known FIR drivers are:
· ali-ircc ALi FIR Controller Driver for ALi M5123 (options: io, irq, dma).
This driver supports SIR, MIR and FIR (4Mbps) speeds. This chipset is used
by e.g.:
The ALi M5123 FIR Controller is embedded in ALi M1543C, M1535, M1535D,
M1535+, M1535D South Bridge.
· irda-usb IrDA-USB device driver, for USB devices/dongles that comply with the
official IrDA-USB class specification. Note: USB 2.0 is not yet tested.
(options: qos_mtt_bits int, description "Minimum Turn Time"). This is used,
for e.g.:
ACTiSYS ACT-IR2000U
KC Technology KC-180
Extended Systems XTNDAccess ESI-9685
Note that there is another USB driver for those devices called ir-usb
which is NOT compatible with the IrDA stack and conflict with irda-usb.
Because it always loads first, you have to remove ir-usb completely.
Devices based on the SigmaTel chip are not not compliant with the IrDA-
USB class specification and therfore not supported by this driver.
· nsc-ircc NSC IrDA device driver (options: io, irq, dma, dongle_id,
qos_mtt_bits). This chipset is used by e.g.:
IBM ThinkPad dongle_id=0x09
HP OmniBook 6000 dongle_id=0x08
· sa1100_ir Infrared driver for devices based on the StrongARM SA1100 embedded
microprocessor (options: power_level, tx_lpm). This driver may support FIR
on devices that can do it. This chipset is used by e.g.:
Samsung YOPY, COMPAQ iPAQ, SHARP Zaurus SL5000/5500
· smc-ircc SMC IrCC controller driver (options: ircc_dma, ircc_irq). This
chipset is used by e.g.:
Fujitsu-Siemens Lifebook 635t Sony PCG-505TX
· w83977af_ir Winbond W83977AF IrDA device driver (options: io, irq,
qos_mtt_bits). This chipset is used by e.g.:
Corel NetWinder
· toshoboe Toshiba OBOE IrDA device driver, supports Toshiba Type-O IR chipset.
(options: max_baud). This chipset is used by e.g.:
Toshiba Libretto 100CT., and many more old Toshiba laptops.
· donauboe is a new version of toshoboe and has better FIR support and compa-
bility with the Donauoboe chip http://libxg.free.fr/lib-irda.html (options:
..). This chipset is used by e.g.:
Toshiba Libretto 100CT., Tecra 8100, Portege 7020 and many more Toshiba
laptops.
· vlsi_ir VLSI 82C147 SIR/MIR/FIR device driver This chipset is used by e.g.:
HP Omnibook 800
(options: ..).
· clksrc int, description "clock input source selection"
· ringsize int array (min = 1, max = 2), description "tx, rx ring
descriptor size"
· sirpulse int, description "sir pulse width tuning"
· mtt_bits int, description "IrLAP bitfield representing min-turn-
time"
EXAMPLES
Attach the IrDA stack to the second serial port (integrated IrDA port using serial
emulation) and start discovery:
· irattach /dev/ttyS1 -s
Attach the IrDA stack to the first serial port where you have an external ACTiSYS
serial dongle and start discovery:
· irattach /dev/ttyS0 -d actisys+ -s
Attach the IrDA stack to the first IrDA-USB dongle and start discovery:
· modprobe irda-usb ; irattach irda0 -s
Attach the IrDA stack to the NSC FIR (4Mbps) device driver on a Thinkpad laptop:
· modprobe nsc-ircc dongle_id=0x9 ; irattach irda0 -s.
Attach the IrDA stack to the NSC FIR (4Mbps) device driver on a Thinkpad laptop:
· irattach irda0 -s.
This assume that you have added the following entries to /etc/conf.mod-
ules:
options nsc-ircc dongle_id=0x09
alias irda0 nsc-ircc
CAVEATS
The following hints are a very short introduction into the configuration of
Linux/IrDA. If this doesn’t help read the Linux/IrDA-Tutorial and/or the Infrared-
HOWTO . Before configuring Linux/IrDA make sure whether you want to configure SIR
or FIR. It’s recommended to try SIR first, unless your device is not compatible
with SIR (for example USB dongles).
To get the SIR "serial" device have a look into the BIOS. Then run dmesg | grep tty
to get a survey of tty devices supported by your machine. Now try to choose the
one, which is probably the IrDA device and use irattach /dev/ttySx -s.
If you don’t succeed with SIR (which seems a rare case) you may try FIR. First look
up the BIOS. Then run findchip to get information about the IrDA controller chip.
Use setserial /dev/ttySx uart none to avoid conflicts with the serial driver.
Note: don’t use setserial if you configure SIR. Now you may use irattach.
Finally irdadump should show at least your computer itself. If it doesn’t start at
the beginning.
This man page deal only with the low level of the IrDA stack (IrDA ports and IrDA
drivers). After this step is done, you usually need to setup your favorite applica-
tion to access the high level IrDA stack (via IrCOMM, IrLPT, IrNET, IrLAN or
IrSOCK), which is documented elsewhere.
This man page doesn’t document the usage of the irport driver. The irport driver
support the same hardware as the irtty driver, but is configured like a FIR driver.
DIAGNOSTICS
This section currently contains the raw error messages from source code only.
"ioctl(TIOCGETD): %m"
"irattach: tty: set_disc(%d): %s"
"tcsetattr: %m"
"Failed to open %s: %m"
"Couldn’t get device fd flags: %m"
"Couldn’t set device to non-blocking mode: %m"
BUGS
N.N.
SEE ALSO
irattach(8), irdaping(8), irdadump(8), findchip(8), irpsion5(8), modprobe(8)
Linux/IrDA Project http://irda.sourceforge.net -*- Linux/IrDA-Tutorial
http://www.hpl.hp.com/personal/Jean_Tourrilhes/IrDA/index.html -*- Infrared-HOWTO
http://tuxmobil.org/howtos.html -*- Infrared-Hardware-Survey http://tuxmo-
bil.org/ir_misc.html
AUTHOR
This manual page is written by Werner Heuser wehe AT tuxmobil.org. It is based on the
READMEs from irda-utils by the Linux/IrDA Project and the Linux/IrDA-Tutorial. It
was subsequently updated and modified by Jean Tourrilhes jt AT hpl.com.
COPYRIGHT
Copyright (c) 2001 Werner Heuser Copyright (c) 2002 Jean Tourrilhes
Permission is granted to copy, distribute and/or modify this document under the
terms of the GNU Free Documentation License (GFDL), Version 1.1 or any later ver-
sion published by the Free Software Foundation; with no Invariant Sections, no
Front-Cover Texts and no Back-Cover Texts.
irattach(8)
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On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
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