From: Antti Palosaari <crope@iki.fi>
To: Jochen Friedrich <jochen@scram.de>
Cc: Roberto Ragusa <mail@robertoragusa.it>,
linux-dvb@linuxtv.org, linux-media@vger.kernel.org,
Manu Abraham <abraham.manu@gmail.com>
Subject: Re: [linux-dvb] MC44S803 frontend (it works)
Date: Sat, 10 Jan 2009 15:59:33 +0200 [thread overview]
Message-ID: <4968A9C5.7060708@iki.fi> (raw)
In-Reply-To: <496875BF.7060605@scram.de>
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
regards
Antti
--
http://palosaari.fi/
next prev parent reply other threads:[~2009-01-10 13:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-09 15:15 [linux-dvb] MC44S803 frontend (it works) Luís Silva
2009-01-09 16:15 ` Roberto Ragusa
2009-01-09 17:39 ` Jochen Friedrich
2009-01-09 18:22 ` Antti Palosaari
2009-01-10 10:17 ` Jochen Friedrich
2009-01-10 13:59 ` Antti Palosaari [this message]
2009-01-10 14:35 ` Jochen Friedrich
2009-01-09 18:25 ` Antti Palosaari
[not found] <4936FF66.3020109@robertoragusa.it>
2008-12-19 20:11 ` [linux-dvb] MC44S803 frontend Jochen Friedrich
2009-01-05 16:21 ` [linux-dvb] MC44S803 frontend (it works) Roberto Ragusa
2009-01-07 22:53 ` Detlef Rohde
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