DTVIIC(4)

💅 DTVIIC(4) — like, the I2C modules for DTV, bestie

okay so this is the DTVIIC(4) page from the Kernel Interfaces Manual — yes it's a section 4 one, we love that for us 🫶

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✨ NAME ✨

dtviic, au8522, cx24227, lg3303, mt2131, nxt2k, zl10353, tvpll, xc3028, xc5k — the Inter IC (I2C) modules for DTV, aka the whole little friend group 💖

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🌸 DESCRIPTION 🌸

So the dtviic modules are the ones that provide support for dtv(4) devices. The dtviic module group is literally a squad of tuners, demodulators, and analog video decoders. No cap. 👑

The usual hardware structure is: a host controller (connected, like, for instance via usb(4) or pci(4)) that provides the data moving facilities — for the analog or digital video streams — plus an iic(4) bus over which all the other chips get configured. That's the vibe check. 🦋

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:

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

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🍓 FILES 🍓

the firmware files, bestie, they're literally required 📁✨

• dvb-fe-nxt2004.fw needed by nxt2k
• xc3028-v27.fw or xc3028L-v36.fw (provided by pkgsrc/sysutils/xc3028l-firmware) needed by xc3028
• dvb-fe-xc5000-1.6.114.fw needed by xc5k, provided by the pkgsrc/sysutils/xc5k-firmware

ngl, if you're missing these, your device is gonna be giving absolutely nothing 😭 go install the firmware.

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🧚 SEE ALSO 🧚

dtv(4), iic(4), module(7) — go read those too, iykyk 💜

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⭐ HISTORY ⭐

The dtviic modules first appeared in NetBSD 6.0. iconic behavior honestly 🌈

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👑 AUTHORS 👑

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

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and that's the whole page, bestie — this one's a Debian page, dated August 30, 2011, sitting pretty as DTVIIC(4) 💅 periodt 🌟