.\" $NetBSD: dtviic.4,v 1.5 2011/08/31 07:04:49 jruoho Exp $
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.\" by Thomas Klausner.
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.Dd August 30, 2011
.Dt DTVIIC 4
.Os
.Sh NAME
.Nm dtviic ,
.Nm au8522 ,
.Nm cx24227 ,
.Nm lg3303 ,
.Nm mt2131 ,
.Nm nxt2k ,
.Nm zl10353 ,
.Nm tvpll ,
.Nm xc3028 ,
.Nm xc5k
.Nd Inter IC (I2C) modules for DTV
.Sh DESCRIPTION
The
.Nm
modules provide support for
.Xr dtv 4
devices.
The
.Nm
module group includes tuners, demodulators, and analog video decoders.
.Pp
The usual hardware structure consists of a host controller
(connected for instance via
.Xr usb 4
or
.Xr pci 4 )
that provides the data moving facilities (for the analog or
digital video streams) and an
.Xr iic 4
bus over which the other chips can be configured.
.Pp
For example, a typical
.Xr dtv 4
setup would look like this:
.Bl -enum -offset indent
.It
Initialize transport stream
.Pq Dv TS
port on the host controller.
.It
Configure the demodulator that
.Dq demodulates
the information from an intermediate frequency
.Pq Dv IF
that is provided to it by the associated tuner.
This step typically includes setting the desired
quadrature amplitude modulation
.Pq Dv QAM
and bandwidth, among other things.
.It
Configure the tuner.
Typically this step includes at least setting the frequency.
.It
Start TS transfer (using
.Dv DMA
transfers or
.Dv USB
high speed transfers).
.El
.Pp
The supported demodulators include:
.Bl -tag -width 10n -offset indent
.It Nm au8522
Auvitek AU8522 ATSC/QAM64/QAM256 demodulator
.It Nm cx24227
Conexant CX24227 ATSC/QAM64/QAM256 demodulator
.It Nm lg3303
LG LGDT3303 ATSC/QAM64/QAM256 demodulator
.It Nm mt2131
MicroTune MT2131 ATSC demodulator
.It Nm nxt2k
NxtWave Communications NXT2004 ATSC demodulator
.It Nm zl10353
Zarlink ZL10353 (Intel CE623x) COFDM/DVB-T demodulator
.El
.Pp
The supported tuners are:
.Bl -tag -width 10n -offset indent
.It Ic tvpll
Generic PLL-based tuners
.It Nm xc3028
XCeive XC3028 analog and digital tuner
.It Nm xc5k
Xceive XC5000 analog and digital tuner
.El
.Sh FILES
.Bl -bullet -offset indent
.It
.Pa dvb-fe-nxt2004.fw
needed by
.Nm nxt2k
.It
.Pa xc3028-v27.fw
or
.Pa xc3028L-v36.fw
(provided by
.Pa pkgsrc/sysutils/xc3028l-firmware )
needed by
.Nm xc3028
.It
.Pa dvb-fe-xc5000-1.6.114.fw
needed by
.Nm xc5k ,
provided by the
.Pa pkgsrc/sysutils/xc5k-firmware
.El
.Sh SEE ALSO
.Xr dtv 4 ,
.Xr iic 4 ,
.Xr module 7
.Sh HISTORY
The
.Nm
modules first appeared in
.Nx 6.0 .
.Sh AUTHORS
.An -nosplit
Authors include
.An Jared D. McNeill
.Aq jmcneill@NetBSD.org ,
.An Jonathan A. Kollasch
.Aq jakllsch@NetBSD.org ,
and
.An Jukka Ruohonen
.Aq jruohonen@iki.fi .