DTVIIC(4) Device Drivers Manual DTVIIC(4)

dtviic, au8522, cx24227, lg3303, mt2131, nxt2k, zl10353, tvpll, xc3028, xc5k — Inter IC (I2C) modules for DTV

The dtviic modules provide support for dtv(4) devices. The dtviic module group includes tuners, demodulators, and analog video decoders.

The usual hardware structure consists of a host controller (connected for instance via usb(4) or pci(4)) that provides the data moving facilities (for the analog or digital video streams) and an iic(4) bus over which the other chips can be configured.

For example, a typical dtv(4) setup would look like this:

  1. Initialize transport stream (TS) port on the host controller.
  2. Configure the demodulator that “demodulates” the information from an intermediate frequency (IF) that is provided to it by the associated tuner. This step typically includes setting the desired quadrature amplitude modulation (QAM) and bandwidth, among other things.
  3. Configure the tuner. Typically this step includes at least setting the frequency.
  4. Start TS transfer (using DMA transfers or USB high speed transfers).

The supported demodulators include:

au8522
Auvitek AU8522 ATSC/QAM64/QAM256 demodulator
cx24227
Conexant CX24227 ATSC/QAM64/QAM256 demodulator
lg3303
LG LGDT3303 ATSC/QAM64/QAM256 demodulator
mt2131
MicroTune MT2131 ATSC demodulator
nxt2k
NxtWave Communications NXT2004 ATSC demodulator
zl10353
Zarlink ZL10353 (Intel CE623x) COFDM/DVB-T demodulator

The supported tuners are:

Generic PLL-based tuners
xc3028
XCeive XC3028 analog and digital tuner
xc5k
Xceive XC5000 analog and digital tuner

dtv(4), iic(4), module(7)

The dtviic modules first appeared in NetBSD 6.0.

Authors include Jared D. McNeill ⟨jmcneill@NetBSD.org⟩, Jonathan A. Kollasch ⟨jakllsch@NetBSD.org⟩, and Jukka Ruohonen ⟨jruohonen@iki.fi⟩.

August 30, 2011 NetBSD 11.0