linux/Documentation/video4linux/bttv/README
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   2Release notes for bttv
   3======================
   4
   5You'll need at least these config options for bttv:
   6        CONFIG_I2C=m
   7        CONFIG_I2C_ALGOBIT=m
   8        CONFIG_VIDEO_DEV=m
   9
  10The latest bttv version is available from http://bytesex.org/bttv/
  11
  12
  13Make bttv work with your card
  14-----------------------------
  15
  16Just try "modprobe bttv" and see if that works.
  17
  18If it doesn't bttv likely could not autodetect your card and needs some
  19insmod options.  The most important insmod option for bttv is "card=n"
  20to select the correct card type.  If you get video but no sound you've
  21very likely specified the wrong (or no) card type.  A list of supported
  22cards is in CARDLIST.bttv
  23
  24If bttv takes very long to load (happens sometimes with the cheap
  25cards which have no tuner), try adding this to your modules.conf:
  26        options i2c-algo-bit bit_test=1
  27
  28For the WinTV/PVR you need one firmware file from the driver CD:
  29hcwamc.rbf.  The file is in the pvr45xxx.exe archive (self-extracting
  30zip file, unzip can unpack it).  Put it into the /etc/pvr directory or
  31use the firm_altera=<path> insmod option to point the driver to the
  32location of the file.
  33
  34If your card isn't listed in CARDLIST.bttv or if you have trouble making
  35audio work, you should read the Sound-FAQ.
  36
  37
  38Autodetecting cards
  39-------------------
  40
  41bttv uses the PCI Subsystem ID to autodetect the card type.  lspci lists
  42the Subsystem ID in the second line, looks like this:
  43
  4400:0a.0 Multimedia video controller: Brooktree Corporation Bt878 (rev 02)
  45        Subsystem: Hauppauge computer works Inc. WinTV/GO
  46        Flags: bus master, medium devsel, latency 32, IRQ 5
  47        Memory at e2000000 (32-bit, prefetchable) [size=4K]
  48
  49only bt878-based cards can have a subsystem ID (which does not mean
  50that every card really has one).  bt848 cards can't have a Subsystem
  51ID and therefore can't be autodetected.  There is a list with the ID's
  52in bttv-cards.c (in case you are intrested or want to mail patches
  53with updates).
  54
  55
  56Still doesn't work?
  57-------------------
  58
  59I do NOT have a lab with 30+ different grabber boards and a
  60PAL/NTSC/SECAM test signal generator at home, so I often can't
  61reproduce your problems.  This makes debugging very difficult for me.
  62If you have some knowledge and spare time, please try to fix this
  63yourself (patches very welcome of course...)  You know: The linux
  64slogan is "Do it yourself".
  65
  66There is a mailing list: linux-media@vger.kernel.org
  67http://vger.kernel.org/vger-lists.html#linux-media
  68
  69If you have trouble with some specific TV card, try to ask there
  70instead of mailing me directly.  The chance that someone with the
  71same card listens there is much higher...
  72
  73For problems with sound:  There are a lot of different systems used
  74for TV sound all over the world.  And there are also different chips
  75which decode the audio signal.  Reports about sound problems ("stereo
  76does'nt work") are pretty useless unless you include some details
  77about your hardware and the TV sound scheme used in your country (or
  78at least the country you are living in).
  79
  80
  81Finally: If you mail some patches for bttv around the world (to
  82linux-kernel/Alan/Linus/...), please Cc: me.
  83
  84
  85Have fun with bttv,
  86
  87  Gerd
  88
  89--
  90Gerd Knorr <kraxel@bytesex.org>
  91
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