[linux-dvb] MC44S803 frontend (it works)

Antti Palosaari crope at iki.fi
Sat Jan 10 14:59:33 CET 2009

Jochen Friedrich wrote:
> Hi Antti,
>> Could you explain for changes af9015_i2c_xfer() done? Is it for case I2C 
>> READ coming from MC44S803 but tuner does not implement read at all? Is 
>> it really needed?
> Yes. Currently, MC44S803 uses a READ in mc44s80x_get_devid() to check the ID register.
> According to the spec from freescale, a READ needs to be a seperate I2c transaction,
> because the STOP bit is used to latch the address registers. That's the reason why a
> dedicated READ support is needed (most other tuners use a WRITE / READ combined I2c
> transaction instead).

OK. Maybe comment to the code is required, but I can add it. I am 
willing to see, if you have, usb-sniffs for tuner read and write.

>> Maybe I can move MC44S803 and needed AF9015 changes to my devel tree at 
>> linuxtv.org... But that does not change problem that tuner is not still 
>> in v4l-dvb-master nor coming for Kernel before Manu will pull it.
> Unfortunately, i didn't see any comments from Manu yet...

we will waiting...

> Thanks,
> Jochen


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