Spent most of the afternoon working on my tool which generates the firmware images for the xc4000. Pulled in the code from the existing xc2028/3028 driver to load the scode/std firmware into the chip, but it seems to fail the i2c write with the DTV8 standard. Probably some issue with switching between direct/indirect mode.
Once that is done, we should be in reasonably good shape for the xc4000 driver (aside from a bunch of cleanup work). Will then have to get the dib7000p config setup at which point we can attempt to tune.
In other words, continuing to make forward progress…