+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-
-Idea behind the dvb-usb-framework
-=================================
-
-.. note::
-
- #) This documentation is outdated. Please check at the DVB wiki
- at https://linuxtv.org/wiki for more updated info.
-
- #) **deprecated:** Newer DVB USB drivers should use the dvb-usb-v2 framework.
-
-In March 2005 I got the new Twinhan USB2.0 DVB-T device. They provided specs
-and a firmware.
-
-Quite keen I wanted to put the driver (with some quirks of course) into dibusb.
-After reading some specs and doing some USB snooping, it realized, that the
-dibusb-driver would be a complete mess afterwards. So I decided to do it in a
-different way: With the help of a dvb-usb-framework.
-
-The framework provides generic functions (mostly kernel API calls), such as:
-
-- Transport Stream URB handling in conjunction with dvb-demux-feed-control
- (bulk and isoc are supported)
-- registering the device for the DVB-API
-- registering an I2C-adapter if applicable
-- remote-control/input-device handling
-- firmware requesting and loading (currently just for the Cypress USB
- controllers)
-- other functions/methods which can be shared by several drivers (such as
- functions for bulk-control-commands)
-- TODO: a I2C-chunker. It creates device-specific chunks of register-accesses
- depending on length of a register and the number of values that can be
- multi-written and multi-read.
-
-The source code of the particular DVB USB devices does just the communication
-with the device via the bus. The connection between the DVB-API-functionality
-is done via callbacks, assigned in a static device-description (struct
-dvb_usb_device) each device-driver has to have.
-
-For an example have a look in drivers/media/usb/dvb-usb/vp7045*.
-
-Objective is to migrate all the usb-devices (dibusb, cinergyT2, maybe the
-ttusb; flexcop-usb already benefits from the generic flexcop-device) to use
-the dvb-usb-lib.
-
-TODO: dynamic enabling and disabling of the pid-filter in regard to number of
-feeds requested.
-
-Supported devices
------------------
-
-See the LinuxTV DVB Wiki at https://linuxtv.org for a complete list of
-cards/drivers/firmwares:
-https://linuxtv.org/wiki/index.php/DVB_USB
-
-0. History & News:
-
- 2005-06-30
-
- - added support for WideView WT-220U (Thanks to Steve Chang)
-
- 2005-05-30
-
- - added basic isochronous support to the dvb-usb-framework
- - added support for Conexant Hybrid reference design and Nebula
- DigiTV USB
-
- 2005-04-17
-
- - all dibusb devices ported to make use of the dvb-usb-framework
-
- 2005-04-02
-
- - re-enabled and improved remote control code.
-
- 2005-03-31
-
- - ported the Yakumo/Hama/Typhoon DVB-T USB2.0 device to dvb-usb.
-
- 2005-03-30
-
- - first commit of the dvb-usb-module based on the dibusb-source.
- First device is a new driver for the
- TwinhanDTV Alpha / MagicBox II USB2.0-only DVB-T device.
- - (change from dvb-dibusb to dvb-usb)
-
- 2005-03-28
-
- - added support for the AVerMedia AverTV DVB-T USB2.0 device
- (Thanks to Glen Harris and Jiun-Kuei Jung, AVerMedia)
-
- 2005-03-14
-
- - added support for the Typhoon/Yakumo/HAMA DVB-T mobile USB2.0
-
- 2005-02-11
-
- - added support for the KWorld/ADSTech Instant DVB-T USB2.0.
- Thanks a lot to Joachim von Caron
-
- 2005-02-02
- - added support for the Hauppauge Win-TV Nova-T USB2
-
- 2005-01-31
- - distorted streaming is gone for USB1.1 devices
-
- 2005-01-13
-
- - moved the mirrored pid_filter_table back to dvb-dibusb
- first almost working version for HanfTek UMT-010
- found out, that Yakumo/HAMA/Typhoon are predecessors of the HanfTek UMT-010
-
- 2005-01-10
-
- - refactoring completed, now everything is very delightful
-
- - tuner quirks for some weird devices (Artec T1 AN2235 device has sometimes a
- Panasonic Tuner assembled). Tunerprobing implemented.
- Thanks a lot to Gunnar Wittich.
-
- 2004-12-29
-
- - after several days of struggling around bug of no returning URBs fixed.
-
- 2004-12-26
-
- - refactored the dibusb-driver, split into separate files
- - i2c-probing enabled
-
- 2004-12-06
-
- - possibility for demod i2c-address probing
- - new usb IDs (Compro, Artec)
-
- 2004-11-23
-
- - merged changes from DiB3000MC_ver2.1
- - revised the debugging
- - possibility to deliver the complete TS for USB2.0
-
- 2004-11-21
-
- - first working version of the dib3000mc/p frontend driver.
-
- 2004-11-12
-
- - added additional remote control keys. Thanks to Uwe Hanke.
-
- 2004-11-07
-
- - added remote control support. Thanks to David Matthews.
-
- 2004-11-05
-
- - added support for a new devices (Grandtec/Avermedia/Artec)
- - merged my changes (for dib3000mb/dibusb) to the FE_REFACTORING, because it became HEAD
- - moved transfer control (pid filter, fifo control) from usb driver to frontend, it seems
- better settled there (added xfer_ops-struct)
- - created a common files for frontends (mc/p/mb)
-
- 2004-09-28
-
- - added support for a new device (Unknown, vendor ID is Hyper-Paltek)
-
- 2004-09-20
-
- - added support for a new device (Compro DVB-U2000), thanks
- to Amaury Demol for reporting
- - changed usb TS transfer method (several urbs, stopping transfer
- before setting a new pid)
-
- 2004-09-13
-
- - added support for a new device (Artec T1 USB TVBOX), thanks
- to Christian Motschke for reporting
-
- 2004-09-05
-
- - released the dibusb device and dib3000mb-frontend driver
- (old news for vp7041.c)
-
- 2004-07-15
-
- - found out, by accident, that the device has a TUA6010XS for PLL
-
- 2004-07-12
-
- - figured out, that the driver should also work with the
- CTS Portable (Chinese Television System)
-
- 2004-07-08
-
- - firmware-extraction-2.422-problem solved, driver is now working
- properly with firmware extracted from 2.422
- - #if for 2.6.4 (dvb), compile issue
- - changed firmware handling, see vp7041.txt sec 1.1
-
- 2004-07-02
-
- - some tuner modifications, v0.1, cleanups, first public
-
- 2004-06-28
-
- - now using the dvb_dmx_swfilter_packets, everything runs fine now
-
- 2004-06-27
-
- - able to watch and switching channels (pre-alpha)
- - no section filtering yet
-
- 2004-06-06
-
- - first TS received, but kernel oops :/
-
- 2004-05-14
-
- - firmware loader is working
-
- 2004-05-11
-
- - start writing the driver
-
-How to use?
------------
-
-Firmware
-~~~~~~~~
-
-Most of the USB drivers need to download a firmware to the device before start
-working.
-
-Have a look at the Wikipage for the DVB-USB-drivers to find out, which firmware
-you need for your device:
-
-https://linuxtv.org/wiki/index.php/DVB_USB
-
-Compiling
-~~~~~~~~~
-
-Since the driver is in the linux kernel, activating the driver in
-your favorite config-environment should sufficient. I recommend
-to compile the driver as module. Hotplug does the rest.
-
-If you use dvb-kernel enter the build-2.6 directory run 'make' and 'insmod.sh
-load' afterwards.
-
-Loading the drivers
-~~~~~~~~~~~~~~~~~~~
-
-Hotplug is able to load the driver, when it is needed (because you plugged
-in the device).
-
-If you want to enable debug output, you have to load the driver manually and
-from within the dvb-kernel cvs repository.
-
-first have a look, which debug level are available:
-
-.. code-block:: none
-
- # modinfo dvb-usb
- # modinfo dvb-usb-vp7045
-
- etc.
-
-.. code-block:: none
-
- modprobe dvb-usb debug=<level>
- modprobe dvb-usb-vp7045 debug=<level>
- etc.
-
-should do the trick.
-
-When the driver is loaded successfully, the firmware file was in
-the right place and the device is connected, the "Power"-LED should be
-turned on.
-
-At this point you should be able to start a dvb-capable application. I'm use
-(t|s)zap, mplayer and dvbscan to test the basics. VDR-xine provides the
-long-term test scenario.
-
-Known problems and bugs
------------------------
-
-- Don't remove the USB device while running an DVB application, your system
- will go crazy or die most likely.
-
-Adding support for devices
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-TODO
-
-USB1.1 Bandwidth limitation
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-A lot of the currently supported devices are USB1.1 and thus they have a
-maximum bandwidth of about 5-6 MBit/s when connected to a USB2.0 hub.
-This is not enough for receiving the complete transport stream of a
-DVB-T channel (which is about 16 MBit/s). Normally this is not a
-problem, if you only want to watch TV (this does not apply for HDTV),
-but watching a channel while recording another channel on the same
-frequency simply does not work very well. This applies to all USB1.1
-DVB-T devices, not just the dvb-usb-devices)
-
-The bug, where the TS is distorted by a heavy usage of the device is gone
-definitely. All dvb-usb-devices I was using (Twinhan, Kworld, DiBcom) are
-working like charm now with VDR. Sometimes I even was able to record a channel
-and watch another one.
-
-Comments
-~~~~~~~~
-
-Patches, comments and suggestions are very very welcome.
-
-3. Acknowledgements
--------------------
-
- Amaury Demol (Amaury.Demol@parrot.com) and Francois Kanounnikoff from DiBcom for
- providing specs, code and help, on which the dvb-dibusb, dib3000mb and
- dib3000mc are based.
-
- David Matthews for identifying a new device type (Artec T1 with AN2235)
- and for extending dibusb with remote control event handling. Thank you.
-
- Alex Woods for frequently answering question about usb and dvb
- stuff, a big thank you.
-
- Bernd Wagner for helping with huge bug reports and discussions.
-
- Gunnar Wittich and Joachim von Caron for their trust for providing
- root-shells on their machines to implement support for new devices.
-
- Allan Third and Michael Hutchinson for their help to write the Nebula
- digitv-driver.
-
- Glen Harris for bringing up, that there is a new dibusb-device and Jiun-Kuei
- Jung from AVerMedia who kindly provided a special firmware to get the device
- up and running in Linux.
-
- Jennifer Chen, Jeff and Jack from Twinhan for kindly supporting by
- writing the vp7045-driver.
-
- Steve Chang from WideView for providing information for new devices and
- firmware files.
-
- Michael Paxton for submitting remote control keymaps.
-
- Some guys on the linux-dvb mailing list for encouraging me.
-
- Peter Schildmann >peter.schildmann-nospam-at-web.de< for his
- user-level firmware loader, which saves a lot of time
- (when writing the vp7041 driver)
-
- Ulf Hermenau for helping me out with traditional chinese.
-
- André Smoktun and Christian Frömmel for supporting me with
- hardware and listening to my problems very patiently.
git.samba.org / sfrench / cifs-2.6.git / blobdiff