Am 29.11.2012 03:15, schrieb Antti Palosaari: > 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. Do we know any devices with a "real" proprietary firmware ?? I'm not talking about custom USB ID, endpoint configuration and minor stuff like this... >>> >>> 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? > Seems like we have all we need, right ? A TDA18271 driver seems to be in place, what about the LGDT3305 demodulator ? I can try to put the puzzle together, but not before weekend. Matthew, stay tuned but be patient. ;) Regards, Frank > regards > Antti > -- 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
