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 :-) _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
