On Aug 14, 2009, at 1:12 AM, Thomas Fjellstrom wrote:
On Thu August 13 2009, Jarod Wilson wrote:
On Aug 13, 2009, at 12:53 AM, Thomas Fjellstrom wrote:
I stupidly bought the KWorld UB435-Q usb ATSC tuner thinking it was
supported
under linux, and it turns out it isn't. I'm wondering what it would
take to
get it supported. It seems like all of the main chips it uses are
supported,
but the glue code is missing.
I have some C (10 years) programming experience, and have wanted to
contribute
to the linux kernel for quite a while, now I have a good excuse ;)
Would anyone be willing to point me in the right direction?
The UB435-Q is a rebadge of the revision B 340U, which is an em2870
bridge, lgdt3304 demodulator and an nxp tda18271hd/c2 tuner. Its got
the same device ID and everything. I've got a rev A 340U, the only
difference being that it has an nxp tda18271hd/c1 tuner (also same
device ID). I *had* it working just fine until the stick up and died
on me, before I could push the code for merge, but its still floating
about. It wasn't quite working with a c2 device, but that could have
been a device problem (these are quite franky, cheap and poorly made
devices, imo). It could also be that the code ate both sticks and
will
pickle yours as well.
With that caveat emptor, here's where the tree that should at least
get you 95% of the way there with that stick resides:
http://www.kernellabs.com/hg/~mkrufky/lgdt3304-3/
The last two patches are the relevant ones. They add lgdt3304 demod
support to the lgdt3305 driver (because the current lgdt3304 driver
is, um, lacking) and then add the bits to wire up the stick.
Hi, thanks for the tips. I've applied the last two patches to v4l
"tip", a few
hunks failed, but I managed to apply them by hand, though possibly not
correctly as I can't seem to find a program that thinks the /dev/
video0 device
that pops up is valid. One app claims there is no input on /dev/
video0, and
others just get "select timeouts" and such (also errors regarding
formats and
whatnot).
These sticks are digital-only. Its a driver shortcoming that the
*analog* /dev/video0 device is being created. You need to be hitting /
dev/dvb/adapterX/*, not /dev/video0. See http://linuxtv.org/wiki/index.php/Testing_your_DVB_device
--
Jarod Wilson
jarod@xxxxxxxxxxxx
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