[Gta04-owner] FM Transceiver - split frequency?

[Belisko Marek]

Hi Andreas,

any update in FM area? In previous email you mention about McBSP1 patch
but in your diff I cannot see any McBSP changes. Thanks

On Thu, Apr 19, 2012 at 11:21 PM, Belisko Marek <marek.belisko at gmail.com> wrote:
> On Thu, Apr 12, 2012 at 11:16 PM, Andreas Kemnade <andreas at kemnade.info> wrote:
>> Hi,
>>
>> On Thu, 2012-04-12 at 09:57 +0200, Andreas Kemnade wrote:
>>> Hi,
>>>
>>> On Wed, 11 Apr 2012 23:53:47 +0200
>>> Belisko Marek <marek.belisko at gmail.com> wrote:
>>>
>>> > > About the driver. the status is:
>>> > > I can play audio data into the si4721. It arrives at the right pin.
>>> > > Clock comes from the SoC and looks sane.
>>> > Is there any driver available for that? I plan to work on FM receiver.
>>> >
>>> I have a userspace program to initialize the si4721 using /dev/i2c-2.
>>> Thhat seems to work according to the RSSI values I get. I have an unfinished
>>> patch for the 3.2 kernel for initializing McBSP1 accordingly. I'll
>>> send the diff this evening, so you can help debugging.
>>>
>> the userspace program is at:
>> http://misc.andi.de1.cc/si4721.c
>>
>> The kernel diff is attached (of course not cleaned up yet).
> I can't compile attached diff with Neils 3.3 kernel. I got following
> errors (fixes are in attachment):
> sound/soc/codecs/si47xx.c:54:29: error: conflicting types for
> ‘soc_codec_dev_si47xx’
> sound/soc/codecs/si47xx.h:29:36: note: previous declaration of
> ‘soc_codec_dev_si47xx’ was here
>
> sound/soc/omap/gta04-fm.c:113:15: error: variable ‘gta04_fm_devdata’
> has initializer but incomplete type
> sound/soc/omap/gta04-fm.c:114:2: error: unknown field ‘card’ specified
> in initializer
> sound/soc/omap/gta04-fm.c:114:2: warning: excess elements in struct
> initializer [enabled by default]
> sound/soc/omap/gta04-fm.c:114:2: warning: (near initialization for
> ‘gta04_fm_devdata’) [enabled by default]
> sound/soc/omap/gta04-fm.c:115:2: error: unknown field ‘codec_dev’
> specified in initializer
> sound/soc/omap/gta04-fm.c:115:2: warning: excess elements in struct
> initializer [enabled by default]
> sound/soc/omap/gta04-fm.c:115:2: warning: (near initialization for
> ‘gta04_fm_devdata’) [enabled by default]
> sound/soc/omap/gta04-fm.c:116:2: error: unknown field ‘codec_data’
> specified in initializer
> sound/soc/omap/gta04-fm.c:116:2: warning: excess elements in struct
> initializer [enabled by default]
> sound/soc/omap/gta04-fm.c:116:2: warning: (near initialization for
> ‘gta04_fm_devdata’) [enabled by default]
> sound/soc/omap/gta04-fm.c:113:30: warning: ‘gta04_fm_devdata’ defined
> but not used [-Wunused-variable]
>
>> arecord -D default:CARD=gta04fm
>> should as far as I understand (clock has to come from the SoC) it should
>> spit out data even if the si4721 is not correctly configured.
>> But it does not. We should check the registers if there
>> waits data to be collected and dma ist just not working.
>>
>> Just one hint if you read datasheets and drivers: The chip family seems
>> to have different firmware versions, so that for older chips there
>> are chips which have a totally different interface and newer ones. For
>> the si4721 itself the problem seems not to exist. But a generic si47xx
>> driver made for older ones will not work.
>> Of course the userspace program should be merged with some driver in the
>> kernel.
>>
>> Greetings
>> Andreas Kemnade
>>
>> _______________________________________________
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>> Gta04-owner at goldelico.com
>> http://lists.goldelico.com/mailman/listinfo/gta04-owner
>>
>
> regards,
>
> marek
>
> --
> as simple and primitive as possible
> -------------------------------------------------
> Marek Belisko - OPEN-NANDRA
> Freelance Developer
>
> Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
> Tel: +421 915 052 184
> skype: marekwhite
> twitter: #opennandra
> web: http://open-nandra.com

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
twitter: #opennandra
web: http://open-nandra.com