Markus Rechberger wrote: > On 8/2/07, Michael Krufky <mkrufky@xxxxxxxxxxx> wrote: >> MikeW wrote: >>> Markus Rechberger <mrechberger <at> gmail.com> writes: >>> >>>> Hi Mike, >>>> >>>> Can you shed some more light about the capabilities of the tuner you >>>> intend to add support for? >>>> >>>> regards, >>>> Markus >>> Example: >>> http://www.nxp.com/acrobat_download/literature/9397/75015475.pdf >>> >>> Regards, >>> MikeW >> Mike, >> >> I have already written a completely functional driver for the TDA18271 silicon. >> DVB-T has not yet been tested on it, but I doubt it will be any problem. I >> understand that you are working with the TDA18211 -- do you know how similar it >> is to the 18271? I haven't google'd the 18211 yet, but I'll take a look. >> >> I am currently working to refactor the tuning api between the dvb and v4l >> subsystems -- this is my reasoning for not having released my tda18271 code >> publicly, as of yet. It does work, however, and I have only tested it so far >> using analog broadcasts. The difference for tuning DVB-T is only some small >> changes to certain registers. >> >> Based on what I see in the pdf that you linked above, I wouldn't be surprised if >> the tda18211 featureset is merely a small subset of the tda18271, meant >> specifically for DVB-T. >> >> How much progress have you already made with your driver? >> >> I'd be happy to help you if you have any further questions... If the 18211 is >> indeed program compatible with the 18271, except for the limited featureset, >> then I'd hate to see somebody do double-work. >> >> Regards, >> >> Michael Krufky >> > > > As already mentioned in the IRC channel, following userspace library > adds support for multistandard/hybrid tuners which can do DVB and/or > analogue TV > > (code sample for a userspace tuner library) > http://mcentral.de/hg/~mrec/em28xx-userspace2/file/1ac5bacf3cfc/tuner/userspace/tuner-xc3028.c > > current features: > * it's easy to reuse tuners within v4l and dvb > * floating point calculations > * abstraction of the v4l and dvb framework, which helps reusing that > code for OSX lateron > * bugs will moreover crash the userspace client and leave the kernel > in a stable state > > of course there's still space for some additional features. > > this code is intended to be merged with linux 2.6.24. > A small userspace daemon will take care that the requested tuner > module gets loaded. > > The usuage of such userspace tuner is straightforward and similar like > the other DVB tuners. > > config.tunerid = /* tunerid */ > config.vendorid = /* vendorid */; > config.productid = /* productid */ > config.config = 0; /* configuration 1 in demod client, can match up > with vendor & productid */ > dvb_attach(tuner_stub_attach, dvb_dev->frontend, &dev->i2c_adap, NULL, > NULL, &config); > > A more accurate documentation about it will come ab later when I have > more time for that. > > p.s. > Mike I hope that's fine now :-) LOL, cool, Markus. For the record, to other readers, I emailed Markus privately asking him not to top-quote. I dont have much to say about Markus' new method -- I haven't had time to look into it yet, but it sounds like a nice idea. Meanwhile, i think that Mike, working on the 18211, might be better off working with me, as I have high suspicions that his silicon is a subset of the one I've already worked on. We'll see what happens. Cheers, Michael Krufky _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
