Hi poma, thanks for the very interesting links. Il 04/05/2012 03:27, poma ha scritto: > On 05/03/2012 11:03 AM, Gianluca Gennari wrote: >> Hi poma, >> I have a 0BDA:2838 (Easycap EZTV646) and a 0BDA:2832 (no name 20x20mm >> mini DVB-T stick) and both are based on the E4000 tuner, which is not >> supported in the kernel at the moment. >> I have no idea if there are sticks with the same USB PID and the fc0012 >> tuner. > > OK, second one - no name device is "Realtek RTL2832U reference design"**. > > First one: > Once upon a time there was a "EasyCAP"� > "After while crocodile!" > �and "EzCAP" was born. > http://szforwardvideo.en.alibaba.com/aboutus.html > Obviously Easycap EZTV646 != EzCAP EzTV646 > http://www.reddit.com/r/RTLSDR/comments/s6ddo/rtlsdr_compatibility_list_v2_work_in_progress/ > ezcap EzTV646 0BDA:2838 RTL2832U/FC0012 Some revisions may have the E4000* > http://i.imgur.com/mFD1X.jpg > (Generic) 0BDa:2838 RTL2832U/E4000* > � > And, in addition: > http://sdr.osmocom.org/trac/wiki/rtl-sdr > 0x0bda 0x2832 all of them Generic RTL2832U (e.g. hama nano)** > 0x0bda 0x2838 E4000 ezcap USB 2.0 DVB-T/DAB/FM dongle > � > Maybe? > https://sites.google.com/site/myrtlsdr/ That's it. Opening the device enclosure, I can read this on the PCB: "EzTV668 1.0" and it looks identical to the picture posted there. > "EzCap EZTV646 has got RTL2832U/FC0012. However rtl-sdr must be tweaked > to force FC0012 tuner because it has the same PID as EZTV668 (PID: > 0x2838) so running it whithout a tweak will select Elonics E4000 tuner. > Works, not so good at filtering." > � > Conclusion: > At least two devices share same vid/pid with different tuners - fc0012 > vs e4000. > How to resolve this from a drivers perspective in a proper way? This is not a big problem: the rtl2832 driver should read the tuner type from an internal register and load the proper module (or exit with an error message if the tuner is unsupported). > Beside, > there is GPL'ed 'e4k' tuner source code aka 'e4000 improved'*** (Elonics > E4000) > by Harald Welte > http://cgit.osmocom.org/cgit/osmo-sdr/tree/firmware/src/tuner_e4k.c > http://sdr.osmocom.org/trac/ > http://sdr.osmocom.org/trac/wiki/rtl-sdr > http://wiki.spench.net/wiki/RTL2832U*** Very nice. So we should ask Harald Welte if he is willing to have his driver merged in the kernel. > regards, > poma > Regards, Gianluca -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
