cfq-iosched: tweak kick logic a bit more

[linux-block.git] / Documentation / isdn / README.gigaset

GigaSet 307x Device Driver
==========================

1.   Requirements
     ------------
1.1. Hardware
     --------
     This release supports the connection of the Gigaset 307x/417x family of
     ISDN DECT bases via Gigaset M101 Data, Gigaset M105 Data or direct USB
     connection. The following devices are reported to be compatible:

     Bases:
        Siemens Gigaset 3070/3075 isdn
        Siemens Gigaset 4170/4175 isdn
        Siemens Gigaset SX205/255
        Siemens Gigaset SX353
        T-Com Sinus 45 [AB] isdn
        T-Com Sinus 721X[A] [SE]
        Vox Chicago 390 ISDN (KPN Telecom)

     RS232 data boxes:
        Siemens Gigaset M101 Data
        T-Com Sinus 45 Data 1

     USB data boxes:
        Siemens Gigaset M105 Data
        Siemens Gigaset USB Adapter DECT
        T-Com Sinus 45 Data 2
        T-Com Sinus 721 data
        Chicago 390 USB (KPN)

     See also http://www.erbze.info/sinus_gigaset.htm and
              http://gigaset307x.sourceforge.net/

     We had also reports from users of Gigaset M105 who could use the drivers
     with SX 100 and CX 100 ISDN bases (only in unimodem mode, see section 2.4.)
     If you have another device that works with our driver, please let us know.

     Chances of getting an USB device to work are good if the output of
        lsusb
     at the command line contains one of the following:
        ID 0681:0001
        ID 0681:0002
        ID 0681:0009
        ID 0681:0021
        ID 0681:0022

1.2. Software
     --------
     The driver works with ISDN4linux and so can be used with any software
     which is able to use ISDN4linux for ISDN connections (voice or data).
     CAPI4Linux support is planned but not yet available.

     There are some user space tools available at
     http://sourceforge.net/projects/gigaset307x/
     which provide access to additional device specific functions like SMS,
     phonebook or call journal.


2.   How to use the driver
     ---------------------
2.1. Modules
     -------
     For the devices to work, the proper kernel modules have to be loaded.
     This normally happens automatically when the system detects the USB
     device (base, M105) or when the line discipline is attached (M101). It
     can also be triggered manually using the modprobe(8) command, for example
     for troubleshooting or to pass module parameters.

     The module ser_gigaset provides a serial line discipline N_GIGASET_M101
     which drives the device through the regular serial line driver. It must
     be attached to the serial line to which the M101 is connected with the
     ldattach(8) command (requires util-linux-ng release 2.14 or later), for
     example:
	 ldattach GIGASET_M101 /dev/ttyS1
     This will open the device file, attach the line discipline to it, and
     then sleep in the background, keeping the device open so that the line
     discipline remains active. To deactivate it, kill the daemon, for example
     with
	 killall ldattach
     before disconnecting the device. To have this happen automatically at
     system startup/shutdown on an LSB compatible system, create and activate
     an appropriate LSB startup script /etc/init.d/gigaset. (The init name
     'gigaset' is officially assigned to this project by LANANA.)
     Alternatively, just add the 'ldattach' command line to /etc/rc.local.

2.2. Device nodes for user space programs
     ------------------------------------
     The device can be accessed from user space (eg. by the user space tools
     mentioned in 1.2.) through the device nodes:

     - /dev/ttyGS0 for M101 (RS232 data boxes)
     - /dev/ttyGU0 for M105 (USB data boxes)
     - /dev/ttyGB0 for the base driver (direct USB connection)

     You can also select a "default device" which is used by the frontends when
     no device node is given as parameter, by creating a symlink /dev/ttyG to
     one of them, eg.:

        ln -s /dev/ttyGB0 /dev/ttyG

2.3. ISDN4linux
     ----------
     This is the "normal" mode of operation. After loading the module you can
     set up the ISDN system just as you'd do with any ISDN card.
     Your distribution should provide some configuration utility.
     If not, you can use some HOWTOs like
         http://www.linuxhaven.de/dlhp/HOWTO/DE-ISDN-HOWTO-5.html
     If this doesn't work, because you have some recent device like SX100 where
     debug output (see section 3.2.) shows something like this when dialing
         CMD Received: ERROR
         Available Params: 0
         Connection State: 0, Response: -1
         gigaset_process_response: resp_code -1 in ConState 0 !
         Timeout occurred
     you might need to use unimodem mode:

2.4. Unimodem mode
     -------------
     This is needed for some devices [e.g. SX100] as they have problems with
     the "normal" commands.

     If you have installed the command line tool gigacontr, you can enter
     unimodem mode using
         gigacontr --mode unimodem
     You can switch back using
         gigacontr --mode isdn

     You can also load the driver using e.g.
         modprobe usb_gigaset startmode=0
     to prevent the driver from starting in "isdn4linux mode".

     In this mode the device works like a modem connected to a serial port
     (the /dev/ttyGU0, ... mentioned above) which understands the commands
         ATZ                 init, reset
             => OK or ERROR
         ATD
         ATDT                dial
             => OK, CONNECT,
                BUSY,
                NO DIAL TONE,
                NO CARRIER,
                NO ANSWER
         <pause>+++<pause>   change to command mode when connected
         ATH                 hangup

     You can use some configuration tool of your distribution to configure this
     "modem" or configure pppd/wvdial manually. There are some example ppp
     configuration files and chat scripts in the gigaset-VERSION/ppp directory
     in the driver packages from http://sourceforge.net/projects/gigaset307x/.
     Please note that the USB drivers are not able to change the state of the
     control lines (the M105 driver can be configured to use some undocumented
     control requests, if you really need the control lines, though). This means
     you must use "Stupid Mode" if you are using wvdial or you should use the
     nocrtscts option of pppd.
     You must also assure that the ppp_async module is loaded with the parameter
     flag_time=0. You can do this e.g. by adding a line like

        options ppp_async flag_time=0

     to /etc/modprobe.conf. If your distribution has some local module
     configuration file like /etc/modprobe.conf.local,
     using that should be preferred.

2.5. Call-ID (CID) mode
     ------------------
     Call-IDs are numbers used to tag commands to, and responses from, the
     Gigaset base in order to support the simultaneous handling of multiple
     ISDN calls. Their use can be enabled ("CID mode") or disabled ("Unimodem
     mode"). Without Call-IDs (in Unimodem mode), only a very limited set of
     functions is available. It allows outgoing data connections only, but
     does not signal incoming calls or other base events.

     DECT cordless data devices (M10x) permanently occupy the cordless
     connection to the base while Call-IDs are activated. As the Gigaset
     bases only support one DECT data connection at a time, this prevents
     other DECT cordless data devices from accessing the base.

     During active operation, the driver switches to the necessary mode
     automatically. However, for the reasons above, the mode chosen when
     the device is not in use (idle) can be selected by the user.
     - If you want to receive incoming calls, you can use the default
       settings (CID mode).
     - If you have several DECT data devices (M10x) which you want to use
       in turn, select Unimodem mode by passing the parameter "cidmode=0" to
       the driver ("modprobe usb_gigaset cidmode=0" or modprobe.conf).

     If you want both of these at once, you are out of luck.

     You can also use /sys/class/tty/ttyGxy/cidmode for changing the CID mode
     setting (ttyGxy is ttyGU0 or ttyGB0).

2.6. M105 Undocumented USB Requests
     ------------------------------

     The Gigaset M105 USB data box understands a couple of useful, but
     undocumented USB commands. These requests are not used in normal
     operation (for wireless access to the base), but are needed for access
     to the M105's own configuration mode (registration to the base, baudrate
     and line format settings, device status queries) via the gigacontr
     utility. Their use is controlled by the kernel configuration option
     "Support for undocumented USB requests" (CONFIG_GIGASET_UNDOCREQ). If you
     encounter error code -ENOTTY when trying to use some features of the
     M105, try setting that option to "y" via 'make {x,menu}config' and
     recompiling the driver.


3.   Troubleshooting
     ---------------
3.1. Solutions to frequently reported problems
     -----------------------------------------
     Problem:
        You have a slow provider and isdn4linux gives up dialing too early.
     Solution:
        Load the isdn module using the dialtimeout option. You can do this e.g.
        by adding a line like

           options isdn dialtimeout=15

        to /etc/modprobe.conf. If your distribution has some local module
        configuration file like /etc/modprobe.conf.local,
        using that should be preferred.

     Problem:
        Your isdn script aborts with a message about isdnlog.
     Solution:
        Try deactivating (or commenting out) isdnlog. This driver does not
        support it.

     Problem:
        You have two or more DECT data adapters (M101/M105) and only the
        first one you turn on works.
     Solution:
        Select Unimodem mode for all DECT data adapters. (see section 2.4.)

     Problem:
        You want to configure your USB DECT data adapter (M105) but gigacontr
        reports an error: "/dev/ttyGU0: Inappropriate ioctl for device".
     Solution:
        Recompile the usb_gigaset driver with the kernel configuration option
        CONFIG_GIGASET_UNDOCREQ set to 'y'. (see section 2.6.)

3.2. Telling the driver to provide more information
     ----------------------------------------------
     Building the driver with the "Gigaset debugging" kernel configuration
     option (CONFIG_GIGASET_DEBUG) gives it the ability to produce additional
     information useful for debugging.

     You can control the amount of debugging information the driver produces by
     writing an appropriate value to /sys/module/gigaset/parameters/debug, e.g.
        echo 0 > /sys/module/gigaset/parameters/debug
     switches off debugging output completely,
        echo 0x10a020 > /sys/module/gigaset/parameters/debug
     enables the standard set of debugging output messages. These values are
     bit patterns where every bit controls a certain type of debugging output.
     See the constants DEBUG_* in the source file gigaset.h for details.

     The initial value can be set using the debug parameter when loading the
     module "gigaset", e.g. by adding a line
        options gigaset debug=0
     to /etc/modprobe.conf, ...

     Generated debugging information can be found
     - as output of the command
         dmesg
     - in system log files written by your syslog daemon, usually
       in /var/log/, e.g. /var/log/messages.

3.3. Reporting problems and bugs
     ---------------------------
     If you can't solve problems with the driver on your own, feel free to
     use one of the forums, bug trackers, or mailing lists on
         http://sourceforge.net/projects/gigaset307x
     or write an electronic mail to the maintainers.

     Try to provide as much information as possible, such as
     - distribution
     - kernel version (uname -r)
     - gcc version (gcc --version)
     - hardware architecture (uname -m, ...)
     - type and firmware version of your device (base and wireless module,
       if any)
     - output of "lsusb -v" (if using an USB device)
     - error messages
     - relevant system log messages (it would help if you activate debug
       output as described in 3.2.)

     For help with general configuration problems not specific to our driver,
     such as isdn4linux and network configuration issues, please refer to the
     appropriate forums and newsgroups.

3.4. Reporting problem solutions
     ---------------------------
     If you solved a problem with our drivers, wrote startup scripts for your
     distribution, ... feel free to contact us (using one of the places
     mentioned in 3.3.). We'd like to add scripts, hints, documentation
     to the driver and/or the project web page.


4.   Links, other software
     ---------------------
     - Sourceforge project developing this driver and associated tools
         http://sourceforge.net/projects/gigaset307x
     - Yahoo! Group on the Siemens Gigaset family of devices
         http://de.groups.yahoo.com/group/Siemens-Gigaset
     - Siemens Gigaset/T-Sinus compatibility table
         http://www.erbze.info/sinus_gigaset.htm


5.   Credits
     -------
     Thanks to

     Karsten Keil
        for his help with isdn4linux
     Deti Fliegl
        for his base driver code
     Dennis Dietrich
        for his kernel 2.6 patches
     Andreas Rummel
        for his work and logs to get unimodem mode working
     Andreas Degert
        for his logs and patches to get cx 100 working
     Dietrich Feist
        for his generous donation of one M105 and two M101 cordless adapters
     Christoph Schweers
        for his generous donation of a M34 device

     and all the other people who sent logs and other information.