Linux support for OMAP 850

Linux support for OMAP 850

[sandeep lahane]

Hi

I think this might have been discussed here before but I couldn't
search/find any related topic on list (Is there any search tool for
this list? I couldn't find it), in case something relevant exists, any
pointers will be useful and apologies in advance if this causes
redundancy.

As far as I know, OMAP730 has Linux support but OMAP 850 doesn't.
OMAP850 can be considered as improved version of OMAP730 with few new
and/or enhanced features and some features have been dropped too.
After referring the manuals, I approximately know what are the
differences between these two processors. From  kernel (2.6.x) support
point of view I am figuring out what needs to be done to support
OMAP850, but I think this might have been done already. Any references
in this regard would be useful.
-- 

Regards,
Sandeep.

Re: Linux support for OMAP 850

[Trilok Soni]

On 2/19/07, sandeep lahane <sandeep.lahane@gmail.com> wrote:
> Hi
>
> I think this might have been discussed here before but I couldn't
> search/find any related topic on list (Is there any search tool for
> this list? I couldn't find it), in case something relevant exists, any
> pointers will be useful and apologies in advance if this causes
> redundancy.

google keywords: site:linux.omap.com OMAP850 support

First link:
http://linux.omap.com/pipermail/linux-omap-open-source/2006-April/006891.html

It has already been integrated into omap git tree. Please pull the
tree from http://source.mvista.com/git .


-- 
--Trilok Soni

Re: Linux support for OMAP 850

[sandeep lahane]

On 2/19/07, Trilok Soni <soni.trilok@gmail.com> wrote:
> On 2/19/07, sandeep lahane <sandeep.lahane@gmail.com> wrote:
> > Hi
> >
> > I think this might have been discussed here before but I couldn't
> > search/find any related topic on list (Is there any search tool for
> > this list? I couldn't find it), in case something relevant exists, any
> > pointers will be useful and apologies in advance if this causes
> > redundancy.
>
> google keywords: site:linux.omap.com OMAP850 support
>
> First link:
> http://linux.omap.com/pipermail/linux-omap-open-source/2006-April/006891.html
>
> It has already been integrated into omap git tree. Please pull the
> tree from http://source.mvista.com/git .
>
>
> --
> --Trilok Soni
>

Hi Trilok,

Thanks for the reply. I have not looked in to the code yet and just
trying to get the high level view of the things. I am listing my
observations and inferences, please correct me if I am wrong.


1. OMAP850 has got an optimized SRAM interface for better frame buffer
performance , which OMAP730 doesnt have.

-> We need to change the frame buffer driver accordingly.

2. The OMAP 3.2 core is optimized for DDR and DMA performances.

-> Modify corresponding drivers.

3. Camera driver has to be modified.

4. compactFlash interface has to be dropped.

5. GPIO driver to be modified.

6.External DMA request line has been added, support to be provided.

7.Traffic controller burst doubler feature added to OMAP 3.2 core
cache fill performance improvement etc (I am not very clear about
this)

8. Addition of DDR memory support to SDRAM (for delay locked loop
etc,not very clear)

Is there anything else we need to do to support OMAP850? Or more
precisely, what all has been changed in Linux for OMAP 730 to make it
work for OMAP850?

If anyone can list the high level subsystem changes made, it will be a
great starting point for me. Thanks again.

-- 

Regards,
Sandeep.

Re: Linux support for OMAP 850

[Trilok Soni]

On 2/19/07, sandeep lahane <sandeep.lahane@gmail.com> wrote:
> >
>
> Hi Trilok,
>
> Thanks for the reply. I have not looked in to the code yet and just
> trying to get the high level view of the things. I am listing my
> observations and inferences, please correct me if I am wrong.
>
>
> 1. OMAP850 has got an optimized SRAM interface for better frame buffer
> performance , which OMAP730 doesnt have.
>
> -> We need to change the frame buffer driver accordingly.
>
> 2. The OMAP 3.2 core is optimized for DDR and DMA performances.
>
> -> Modify corresponding drivers.
>
> 3. Camera driver has to be modified.
>
> 4. compactFlash interface has to be dropped.
>
> 5. GPIO driver to be modified.
>
> 6.External DMA request line has been added, support to be provided.
>
> 7.Traffic controller burst doubler feature added to OMAP 3.2 core
> cache fill performance improvement etc (I am not very clear about
> this)

Please follow board-fsample.c for example. As OMAP730 and 850 are very
much similar, cpu_is_omap7xx() stuff should work for your board. BTW,
are you working 850 based custom board or EVM?. Please read
Documentation/arm/omap/README. Most of the generic api/drivers stuff
in arch/arm/plat-omap/ and mach-omap1 should work for you.

First get basic kernel with serial port driver working, then think of
adding other drivers like camera.

-- 
--Trilok Soni

Re: Linux support for OMAP 850

[sandeep lahane]

On 2/19/07, Trilok Soni <soni.trilok@gmail.com> wrote:
> On 2/19/07, sandeep lahane <sandeep.lahane@gmail.com> wrote:
> > >
> >
> > Hi Trilok,
> >
> > Thanks for the reply. I have not looked in to the code yet and just
> > trying to get the high level view of the things. I am listing my
> > observations and inferences, please correct me if I am wrong.
> >
> >
> > 1. OMAP850 has got an optimized SRAM interface for better frame buffer
> > performance , which OMAP730 doesnt have.
> >
> > -> We need to change the frame buffer driver accordingly.
> >
> > 2. The OMAP 3.2 core is optimized for DDR and DMA performances.
> >
> > -> Modify corresponding drivers.
> >
> > 3. Camera driver has to be modified.
> >
> > 4. compactFlash interface has to be dropped.
> >
> > 5. GPIO driver to be modified.
> >
> > 6.External DMA request line has been added, support to be provided.
> >
> > 7.Traffic controller burst doubler feature added to OMAP 3.2 core
> > cache fill performance improvement etc (I am not very clear about
> > this)
>
> Please follow board-fsample.c for example. As OMAP730 and 850 are very
> much similar, cpu_is_omap7xx() stuff should work for your board. BTW,
> are you working 850 based custom board or EVM?. Please read
> Documentation/arm/omap/README. Most of the generic api/drivers stuff
> in arch/arm/plat-omap/ and mach-omap1 should work for you.
>
> First get basic kernel with serial port driver working, then think of
> adding other drivers like camera.
>
> --
> --Trilok Soni
>


I am working on OMAP 850 based custom board. I think in this case,
apart from most of the generic drivers which might work (since 850 and
730 are similar), I might need to do some board specific stuff too.
-- 

Regards,
Sandeep.

Re: Linux support for OMAP 850

[Trilok Soni]

Sandeep,

On 2/20/07, sandeep lahane <sandeep.lahane@gmail.com> wrote:
> I am working on OMAP 850 based custom board. I think in this case,
> apart from most of the generic drivers which might work (since 850 and
> 730 are similar), I might need to do some board specific stuff too.

Correct. You can leave most of the muxing/specific to your board like
initializations into your bootloader. Hope you have bootloader already
running on that custom board.

-- 
--Trilok Soni

RE: Linux support for OMAP 850

[Omap 850]

please see:

http://linwizard.sourceforge.net/

and

http://omap850.om.funpic.de/downloads/wizard/readme

and

http://webtomware.rhoen.de/linwizard/




sandeep lahane <sandeep.lahane@gmail.com> schrieb: Hi

I think this might have been discussed here before but I couldn't
search/find any related topic on list (Is there any search tool for
this list? I couldn't find it), in case something relevant exists, any
pointers will be useful and apologies in advance if this causes
redundancy.

As far as I know, OMAP730 has Linux support but OMAP 850 doesn't.
OMAP850 can be considered as improved version of OMAP730 with few new
and/or enhanced features and some features have been dropped too.
After referring the manuals, I approximately know what are the
differences between these two processors. From  kernel (2.6.x) support
point of view I am figuring out what needs to be done to support
OMAP850, but I think this might have been done already. Any references
in this regard would be useful.
-- 

Regards,
Sandeep.
_______________________________________________
Linux-omap-open-source mailing list
Linux-omap-open-source@linux.omap.com
http://linux.omap.com/mailman/listinfo/linux-omap-open-source


 		
---------------------------------
Was ist Glück? Schlafen Fische überhaupt? Die Antworten gibt’s auf Yahoo! Clever.