From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.kapsi.fi ([217.30.184.167]:38961 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754705Ab2K2CPp (ORCPT ); Wed, 28 Nov 2012 21:15:45 -0500 Message-ID: <50B6C530.4010701@iki.fi> Date: Thu, 29 Nov 2012 04:15:12 +0200 From: Antti Palosaari MIME-Version: 1.0 To: Matthew Gyurgyik CC: =?ISO-8859-1?Q?Frank_Sch=E4fer?= , linux-media@vger.kernel.org Subject: Re: em28xx: msi Digivox ATSC board id [0db0:8810] References: <50B5779A.9090807@pyther.net> <50B67851.2010808@googlemail.com> <50B69037.3080205@pyther.net> <50B6967C.9070801@iki.fi> <50B6C2DF.4020509@pyther.net> In-Reply-To: <50B6C2DF.4020509@pyther.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On 11/29/2012 04:05 AM, Matthew Gyurgyik wrote: > On 11/28/2012 05:55 PM, Antti Palosaari wrote: >> >> Very, very, good pics and sniffs!! >> >> >> From the sniff you could see I2C addresses >> 50 (a0 >> 1) eeprom >> 0e (1c >> 1) demod >> 60 (c0 >> 1) tuner >> >> >> EM2874, USB-bridge, clocked at 12MHz, crystal on other side of PCB. >> There is also 32k serial eeprom for EM2874. This large serial eeprom >> means (very likely) it uses custom firmware which is downloaded from >> the eeprom. >> >> LGDT3305, demodulator, clocked at 25MHz. Serial TS used between EM2874 >> and LGDT3305. >> >> TDA18271HDC2 is tuner, clocked at 16MHz. Traditional IF used between >> tuner and demod. >> >> IR receiver is near antenna, which is a little bit long wires to >> connect to the EM2874, looks weird but no harm. >> >> >> Main GPIO sequence is that one: >> 000255: 000006 ms 000990 ms c0 00 00 00 80 00 01 00 <<< ff >> 000256: 000004 ms 000994 ms 40 00 00 00 80 00 01 00 >>> fe >> 000257: 000006 ms 001000 ms c0 00 00 00 80 00 01 00 <<< fe >> 000258: 000004 ms 001004 ms 40 00 00 00 80 00 01 00 >>> be >> 000259: 000139 ms 001143 ms c0 00 00 00 80 00 01 00 <<< be >> 000260: 000005 ms 001148 ms 40 00 00 00 80 00 01 00 >>> fe >> >> There is some more GPIOs later, just test with trial and error to find >> out all GPIOs. >> >> Making that device working should be quite easy! There is a little >> change for proprietary firmware for EM2874 which does some nasty >> things, but that is very very unlikely. >> >> regards >> Antti > > Thanks for the information. That is way over my head. Is there same > basic reading someone could recommend so I can start to understand the > basics of all this? > > In the mean time, I'm willing to do any testing necessary. > Maybe I could give hour or two for that if you could make tests I ask? If someone else would like to hack with it, I am very happy too. Frank? regards Antti -- http://palosaari.fi/