141276b57e
Software I2C were using a very conservative value of udelay=16, meaning about 20Kbps. According with Philips I2C datasheet, the i2c should answer well for times at the order of 4.7 us. So, using udelay=5 should work for all devices. After this patch, the speed should be close to 66,67 Kbps, with the current kernel software bitbang, with 30/60 duty cycle. Anyway, added a new parameter (i2c_udelay) that would allow using conservative values, if eventually a hardware doesn't support the datasheet values. Thanks to Jean Delvare <khali@linux-fr.org> for pointing this improvement. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
183 lines
6.5 KiB
Plaintext
183 lines
6.5 KiB
Plaintext
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Note: "modinfo <module>" prints various informations about a kernel
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module, among them a complete and up-to-date list of insmod options.
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This list tends to be outdated because it is updated manually ...
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==========================================================================
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bttv.o
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the bt848/878 (grabber chip) driver
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insmod args:
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card=n card type, see CARDLIST for a list.
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tuner=n tuner type, see CARDLIST for a list.
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radio=0/1 card supports radio
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pll=0/1/2 pll settings
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0: don't use PLL
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1: 28 MHz crystal installed
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2: 35 MHz crystal installed
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triton1=0/1 for Triton1 (+others) compatibility
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vsfx=0/1 yet another chipset bug compatibility bit
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see README.quirks for details on these two.
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bigendian=n Set the endianness of the gfx framebuffer.
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Default is native endian.
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fieldnr=0/1 Count fields. Some TV descrambling software
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needs this, for others it only generates
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50 useless IRQs/sec. default is 0 (off).
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autoload=0/1 autoload helper modules (tuner, audio).
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default is 1 (on).
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bttv_verbose=0/1/2 verbose level (at insmod time, while
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looking at the hardware). default is 1.
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bttv_debug=0/1 debug messages (for capture).
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default is 0 (off).
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irq_debug=0/1 irq handler debug messages.
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default is 0 (off).
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gbuffers=2-32 number of capture buffers for mmap'ed capture.
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default is 4.
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gbufsize= size of capture buffers. default and
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maximum value is 0x208000 (~2MB)
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no_overlay=0 Enable overlay on broken hardware. There
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are some chipsets (SIS for example) which
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are known to have problems with the PCI DMA
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push used by bttv. bttv will disable overlay
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by default on this hardware to avoid crashes.
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With this insmod option you can override this.
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no_overlay=1 Disable overlay. It should be used by broken
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hardware that doesn't support PCI2PCI direct
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transfers.
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automute=0/1 Automatically mutes the sound if there is
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no TV signal, on by default. You might try
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to disable this if you have bad input signal
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quality which leading to unwanted sound
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dropouts.
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chroma_agc=0/1 AGC of chroma signal, off by default.
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adc_crush=0/1 Luminance ADC crush, on by default.
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i2c_udelay= Allow reduce I2C speed. Default is 5 usecs
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(meaning 66,67 Kbps). The default is the
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maximum supported speed by kernel bitbang
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algoritm. You may use lower numbers, if I2C
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messages are lost (16 is known to work on
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all supported cards).
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bttv_gpio=0/1
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gpiomask=
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audioall=
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audiomux=
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See Sound-FAQ for a detailed description.
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remap, card, radio and pll accept up to four comma-separated arguments
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(for multiple boards).
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tuner.o
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The tuner driver. You need this unless you want to use only
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with a camera or external tuner ...
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insmod args:
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debug=1 print some debug info to the syslog
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type=n type of the tuner chip. n as follows:
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see CARDLIST for a complete list.
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pal=[bdgil] select PAL variant (used for some tuners
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only, important for the audio carrier).
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tvmixer.o
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registers a mixer device for the TV card's volume/bass/treble
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controls (requires a i2c audio control chip like the msp3400).
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insmod args:
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debug=1 print some debug info to the syslog.
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devnr=n allocate device #n (0 == /dev/mixer,
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1 = /dev/mixer1, ...), default is to
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use the first free one.
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tvaudio.o
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new, experimental module which is supported to provide a single
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driver for all simple i2c audio control chips (tda/tea*).
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insmod args:
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tda8425 = 1 enable/disable the support for the
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tda9840 = 1 various chips.
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tda9850 = 1 The tea6300 can't be autodetected and is
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tda9855 = 1 therefore off by default, if you have
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tda9873 = 1 this one on your card (STB uses these)
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tda9874a = 1 you have to enable it explicitly.
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tea6300 = 0 The two tda985x chips use the same i2c
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tea6420 = 1 address and can't be disturgished from
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pic16c54 = 1 each other, you might have to disable
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the wrong one.
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debug = 1 print debug messages
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insmod args for tda9874a:
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tda9874a_SIF=1/2 select sound IF input pin (1 or 2)
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(default is pin 1)
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tda9874a_AMSEL=0/1 auto-mute select for NICAM (default=0)
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Please read note 3 below!
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tda9874a_STD=n select TV sound standard (0..8):
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0 - A2, B/G
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1 - A2, M (Korea)
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2 - A2, D/K (1)
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3 - A2, D/K (2)
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4 - A2, D/K (3)
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5 - NICAM, I
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6 - NICAM, B/G
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7 - NICAM, D/K (default)
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8 - NICAM, L
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Note 1: tda9874a supports both tda9874h (old) and tda9874a (new) chips.
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Note 2: tda9874h/a and tda9875 (which is supported separately by
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tda9875.o) use the same i2c address so both modules should not be
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used at the same time.
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Note 3: Using tda9874a_AMSEL option depends on your TV card design!
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AMSEL=0: auto-mute will switch between NICAM sound
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and the sound on 1st carrier (i.e. FM mono or AM).
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AMSEL=1: auto-mute will switch between NICAM sound
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and the analog mono input (MONOIN pin).
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If tda9874a decoder on your card has MONOIN pin not connected, then
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use only tda9874_AMSEL=0 or don't specify this option at all.
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For example:
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card=65 (FlyVideo 2000S) - set AMSEL=1 or AMSEL=0
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card=72 (Prolink PV-BT878P rev.9B) - set AMSEL=0 only
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msp3400.o
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The driver for the msp34xx sound processor chips. If you have a
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stereo card, you probably want to insmod this one.
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insmod args:
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debug=1/2 print some debug info to the syslog,
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2 is more verbose.
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simple=1 Use the "short programming" method. Newer
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msp34xx versions support this. You need this
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for dbx stereo. Default is on if supported by
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the chip.
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once=1 Don't check the TV-stations Audio mode
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every few seconds, but only once after
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channel switches.
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amsound=1 Audio carrier is AM/NICAM at 6.5 Mhz. This
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should improve things for french people, the
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carrier autoscan seems to work with FM only...
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tea6300.o - OBSOLETE (use tvaudio instead)
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The driver for the tea6300 fader chip. If you have a stereo
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card and the msp3400.o doesn't work, you might want to try this
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one. This chip is seen on most STB TV/FM cards (usually from
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Gateway OEM sold surplus on auction sites).
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insmod args:
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debug=1 print some debug info to the syslog.
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tda8425.o - OBSOLETE (use tvaudio instead)
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The driver for the tda8425 fader chip. This driver used to be
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part of bttv.c, so if your sound used to work but does not
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anymore, try loading this module.
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insmod args:
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debug=1 print some debug info to the syslog.
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tda985x.o - OBSOLETE (use tvaudio instead)
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The driver for the tda9850/55 audio chips.
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insmod args:
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debug=1 print some debug info to the syslog.
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chip=9850/9855 set the chip type.
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