From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wg0-f44.google.com ([74.125.82.44]:43070 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754053Ab2EDB1g (ORCPT ); Thu, 3 May 2012 21:27:36 -0400 Received: by wgbdr13 with SMTP id dr13so2262109wgb.1 for ; Thu, 03 May 2012 18:27:35 -0700 (PDT) Message-ID: <4FA33084.7050204@gmail.com> Date: Fri, 04 May 2012 03:27:32 +0200 From: poma MIME-Version: 1.0 To: linux-media@vger.kernel.org, gennarone@gmail.com Subject: Re: [PATCH v2] add support for DeLOCK-USB-2.0-DVB-T-Receiver-61744 References: <4F9E5D91.30503@gmail.com> <1335800374-22012-2-git-send-email-thomas.mair86@googlemail.com> <4F9F8752.40609@gmail.com> <4FA232CE.8010404@gmail.com> <4FA249DE.7000702@gmail.com> In-Reply-To: <4FA249DE.7000702@gmail.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: 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/ "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? 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*** regards, poma