1 .. SPDX-License-Identifier: GPL-2.0
3 How to get the bt8xx cards working
4 ==================================
6 Authors: Richard Walker,
15 This documentation is outdated. Please check at the DVB wiki
16 at https://linuxtv.org/wiki for more updated info.
21 This class of cards has a bt878a as the PCI interface, and require the bttv driver
22 for accessing the i2c bus and the gpio pins of the bt8xx chipset.
23 Please see Documentation/media/dvb-drivers/cards.rst => o Cards based on the Conexant Bt8xx PCI bridge:
25 Compiling kernel please enable:
27 #) ``Device drivers`` => ``Multimedia devices`` => ``Video For Linux`` => ``Enable Video for Linux API 1 (DEPRECATED)``
28 #) ``Device drivers`` => ``Multimedia devices`` => ``Video For Linux`` => ``Video Capture Adapters`` => ``BT848 Video For Linux``
29 #) ``Device drivers`` => ``Multimedia devices`` => ``Digital Video Broadcasting Devices`` => ``DVB for Linux`` ``DVB Core Support`` ``Bt8xx based PCI Cards``
31 Please use the following options with care as deselection of drivers which are in fact necessary may result in DVB devices that cannot be tuned due to lack of driver support:
32 You can save RAM by deselecting every frontend module that your DVB card does not need.
34 First please remove the static dependency of DVB card drivers on all frontend modules for all possible card variants by enabling:
36 #) ``Device drivers`` => ``Multimedia devices`` => ``Digital Video Broadcasting Devices`` => ``DVB for Linux`` ``DVB Core Support`` ``Load and attach frontend modules as needed``
38 If you know the frontend driver that your card needs please enable:
40 #) ``Device drivers`` => ``Multimedia devices`` => ``Digital Video Broadcasting Devices`` => ``DVB for Linux`` ``DVB Core Support`` ``Customise DVB Frontends`` => ``Customise the frontend modules to build``
42 Then please select your card-specific frontend module.
47 Regular case: If the bttv driver detects a bt8xx-based DVB card, all frontend and backend modules will be loaded automatically.
49 - Old TwinHan DST cards or clones with or without CA slot and not containing an Eeprom.
50 People running udev please see Documentation/media/dvb-drivers/udev.rst.
52 In the following cases overriding the PCI type detection for dvb-bt8xx might be necessary:
54 Running TwinHan and Clones
55 ~~~~~~~~~~~~~~~~~~~~~~~~~~
59 $ modprobe bttv card=113
62 Useful parameters for verbosity level and debugging the dst module:
66 verbose=0: messages are disabled
67 1: only error messages are displayed
68 2: notifications are displayed
69 3: other useful messages are displayed
71 dst_addons=0: card is a free to air (FTA) card only
72 0x20: card has a conditional access slot for scrambled channels
74 The autodetected values are determined by the cards' "response string".
75 In your logs see f. ex.: dst_get_device_id: Recognize [DSTMCI].
76 For bug reports please send in a complete log with verbose=4 activated.
77 Please also see Documentation/media/dvb-drivers/ci.rst.
79 Running multiple cards
80 ~~~~~~~~~~~~~~~~~~~~~~
82 Examples of card ID's:
87 Nebula Electronics Digi TV: 104
88 pcHDTV HD-2000 TV: 112
89 Twinhan DST and clones: 113
90 Avermedia AverTV DVB-T 771: 123
91 Avermedia AverTV DVB-T 761: 124
92 DViCO FusionHDTV DVB-T Lite: 128
93 DViCO FusionHDTV 5 Lite: 135
97 The order of the card ID should be uprising:
103 $ modprobe bttv card=113 card=135
105 For a full list of card ID's please see Documentation/media/v4l-drivers/bttv-cardlist.rst.
106 In case of further problems please subscribe and send questions to the mailing list: linux-dvb@linuxtv.org.
108 Probing the cards with broken PCI subsystem ID
109 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
111 There are some TwinHan cards that the EEPROM has become corrupted for some
112 reason. The cards do not have correct PCI subsystem ID. But we can force
113 probing the cards with broken PCI subsystem ID
117 $ echo 109e 0878 $subvendor $subdevice > \
118 /sys/bus/pci/drivers/bt878/new_id
122 109e: PCI_VENDOR_ID_BROOKTREE
123 0878: PCI_DEVICE_ID_BROOKTREE_878