Hardware:
=========

* CPU STx7108, 32-bit kernel
  6 x PTI interface (used first four - 0-3)
      (appears something like programmable transfer interface or so)
* Demodulators 2x STV0900 (dual)
* 2x STV6120 tuners (dual)
* 2x LNBH24 - Dual LNB supply and control IC with step-up and I2C interface

I2C address map:
================

0x10 - LNBH24 #1 / section A : cfg write
0x11 - LNBH24 #1 / section A : diagnostic read
0x12 - LNBH24 #1 / section B : cfg write
0x13 - LNBH24 #1 / section B : diagnostic read
0x14 - LNBH24 #2 / section A : cfg write
0x15 - LNBH24 #2 / section A : diagnostic read
0x16 - LNBH24 #2 / section B : cfg write
0x17 - LNBH24 #2 / section B : diagnostic read

0xc0 - STV6120 #1 / write
0xc1 - STV6120 #1 / read
0xc6 - STV6120 #2 / write
0xc7 - STV6120 #2 / read

0xd0 - STV0900 #1 - write
0xd1 - STV0900 #1 - read
0xd2 - STV0900 #2 - write
0xd3 - STV0900 #3 - read

I2C access
==========

All chips are on the first I2C bus accessible through /dev/i2c-0. You may
look to tools/axehelper.c - i2c_scan routine. Note that linux i2c address is
without the read/write bit (so (0xd0 >> 1) = 0x68).