[U-Boot] Question regarding FPGA firmware load in u-boot

[U-Boot] Question regarding FPGA firmware load in u-boot

[Dieter Kiermaier]

Hello List,

I want to boot a (Lattice) FPGA from u-boot by using Slave Serial 
configuration on a Marvell Kirkwood device.
As seen there is an (Xilinx and Altera) FPGA loader driver allready available 
in u-boot.
Please can somebody explain how I have to provide a FPGA bitstream
image to u-boot?
It seems I have to create a image with mkimage?
This image have to be loaded into ram and the address has to be provided to 
the load command?
Is there a maintainer for the FPGA code inside u-boot?
I'm willing to contribute some extensions for Lattice FPGAs if I'm successful!

Thanks to all,
Dieter

[U-Boot] Question regarding FPGA firmware load in u-boot

[André Schwarz]

Dieter,

On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> Hello List,
> 
> I want to boot a (Lattice) FPGA from u-boot by using Slave Serial 
> configuration on a Marvell Kirkwood device.

Should be no problem as long as you'll have access to GPIO.

> As seen there is an (Xilinx and Altera) FPGA loader driver allready available 
> in u-boot.
> Please can somebody explain how I have to provide a FPGA bitstream
> image to u-boot?

The easiest way is to reserve some unused flash sectors and use the
first sector's start adress as arg for "fpga load".

> It seems I have to create a image with mkimage?

no - Lattice specififc bitstream can be stored in raw format.
mkimage may be useful for update, but personally I prefer update via
dedicated linux mtd partition.

> This image have to be loaded into ram and the address has to be provided to 
> the load command?

Usually an FPGA is *very* board specific. I'd suggest to use flash and
create a corresponding mtd partition for linux, i.e. make it
maintainable.

> Is there a maintainer for the FPGA code inside u-boot?
> I'm willing to contribute some extensions for Lattice FPGAs if I'm successful!
excellent - all you'll need is the Lattice specific bit toggle sequence.

submitting a proper patch will surely do.


Regards,

Andr??

> 
> Thanks to all,
> Dieter
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot



MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner, Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[Dieter Kiermaier]

Andr??,

> Dieter,
>
> On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > Hello List,
> >
> > I want to boot a (Lattice) FPGA from u-boot by using Slave Serial
> > configuration on a Marvell Kirkwood device.
>
> Should be no problem as long as you'll have access to GPIO.

I'm working on it :)
But more likely I would have the SPI controller to do the serializing of the 
bitstream. But maybe this would be the second step.
>
> > As seen there is an (Xilinx and Altera) FPGA loader driver allready
> > available in u-boot.
> > Please can somebody explain how I have to provide a FPGA bitstream
> > image to u-boot?
>
> The easiest way is to reserve some unused flash sectors and use the
> first sector's start adress as arg for "fpga load".
>

I assume this will only work with NOR flash, right?
If I'm using NAND flash I have to copy the image to ram first?

> > It seems I have to create a image with mkimage?
>
> no - Lattice specififc bitstream can be stored in raw format.
> mkimage may be useful for update, but personally I prefer update via
> dedicated linux mtd partition.
>
> > This image have to be loaded into ram and the address has to be provided
> > to the load command?
>
> Usually an FPGA is *very* board specific. I'd suggest to use flash and
> create a corresponding mtd partition for linux, i.e. make it
> maintainable.
>
Seems to be a good way.
Is there a cmd in u-boot to read a file from a jffs2 filesystem inside a nand 
flash partition?

> > Is there a maintainer for the FPGA code inside u-boot?
> > I'm willing to contribute some extensions for Lattice FPGAs if I'm
> > successful!
>
> excellent - all you'll need is the Lattice specific bit toggle sequence.
>
> submitting a proper patch will surely do.
>
I'm trying to get an idea what place is the best to integrate the lattice 
architecture in to the fpga framework.
If I have any further questions - can I ask you again?

>
> Regards,
>
> Andr??

Many thanks for helping,
Dieter


>
> > Thanks to all,
> > Dieter
> > _______________________________________________
> > U-Boot mailing list
> > U-Boot at lists.denx.de
> > http://lists.denx.de/mailman/listinfo/u-boot
>
> MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
> Registergericht: Amtsgericht Stuttgart, HRB 271090
> Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[André Schwarz]

Dieter,

On Mon, 2009-06-22 at 08:19 +0200, Dieter Kiermaier wrote:
> Andr??,
> 
> > Dieter,
> >
> > On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > > Hello List,
> > >
> > > I want to boot a (Lattice) FPGA from u-boot by using Slave Serial
> > > configuration on a Marvell Kirkwood device.
> >
> > Should be no problem as long as you'll have access to GPIO.
> 
> I'm working on it :)
> But more likely I would have the SPI controller to do the serializing of the 
> bitstream. But maybe this would be the second step.

Bitbanging is not critical and works pretty fast.
You definitely have to control maximum frequency and observe errors
during load. If you'll use SPI make sure to disconnect the bus from the
FPGA and keep the config pins in a sane state.

> >
> > > As seen there is an (Xilinx and Altera) FPGA loader driver allready
> > > available in u-boot.
> > > Please can somebody explain how I have to provide a FPGA bitstream
> > > image to u-boot?
> >
> > The easiest way is to reserve some unused flash sectors and use the
> > first sector's start adress as arg for "fpga load".
> >
> 
> I assume this will only work with NOR flash, right?

I'm using NOR flash, but it will work with any adressable memory.

> If I'm using NAND flash I have to copy the image to ram first?

yes.

> 
> > > It seems I have to create a image with mkimage?

you can store e.g. fpga.bin as a single file inside jffs, read it and
load your fpga. 

> >
> > no - Lattice specififc bitstream can be stored in raw format.
> > mkimage may be useful for update, but personally I prefer update via
> > dedicated linux mtd partition.
> >
> > > This image have to be loaded into ram and the address has to be provided
> > > to the load command?
> >
> > Usually an FPGA is *very* board specific. I'd suggest to use flash and
> > create a corresponding mtd partition for linux, i.e. make it
> > maintainable.
> >

> Seems to be a good way.

yes - but not for jffs2 on NAND. You can use a plain binary file
instead.

> Is there a cmd in u-boot to read a file from a jffs2 filesystem inside a nand 
> flash partition?

Have a look at the end of common/cmd_jffs2.c : fsload is the one for
you.

> 
> > > Is there a maintainer for the FPGA code inside u-boot?
> > > I'm willing to contribute some extensions for Lattice FPGAs if I'm
> > > successful!
> >
> > excellent - all you'll need is the Lattice specific bit toggle sequence.
> >
> > submitting a proper patch will surely do.
> >
> I'm trying to get an idea what place is the best to integrate the lattice 
> architecture in to the fpga framework.
> If I have any further questions - can I ask you again?

of course, but since I'm a PowerPC user I can't tell anything specific
to ARM ...


Cheers,

Andr??
> 
> >
> > Regards,
> >
> > Andr??
> 
> Many thanks for helping,
> Dieter

> >
> > > Thanks to all,
> > > Dieter
> > > _______________________________________________
> > > U-Boot mailing list
> > > U-Boot at lists.denx.de
> > > http://lists.denx.de/mailman/listinfo/u-boot
> >
> > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > Hans-Joachim Reich
> 
> 



MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner, Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[Dieter Kiermaier]

Andr??,

> Dieter,
>
> On Mon, 2009-06-22 at 08:19 +0200, Dieter Kiermaier wrote:
> > Andr??,
> >
> > > Dieter,
> > >
> > > On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > > > Hello List,
> > > >
> > > > I want to boot a (Lattice) FPGA from u-boot by using Slave Serial
> > > > configuration on a Marvell Kirkwood device.
> > >
> > > Should be no problem as long as you'll have access to GPIO.
> >
> > I'm working on it :)
> > But more likely I would have the SPI controller to do the serializing of
> > the bitstream. But maybe this would be the second step.
>
> Bitbanging is not critical and works pretty fast.
> You definitely have to control maximum frequency and observe errors
> during load. If you'll use SPI make sure to disconnect the bus from the
> FPGA and keep the config pins in a sane state.
>
Do you have some time values how long your FPGA needs to boot by using 
bitbanging?

> > > > As seen there is an (Xilinx and Altera) FPGA loader driver allready
> > > > available in u-boot.
> > > > Please can somebody explain how I have to provide a FPGA bitstream
> > > > image to u-boot?
> > >
> > > The easiest way is to reserve some unused flash sectors and use the
> > > first sector's start adress as arg for "fpga load".
> >
> > I assume this will only work with NOR flash, right?
>
> I'm using NOR flash, but it will work with any adressable memory.
>
> > If I'm using NAND flash I have to copy the image to ram first?
>
> yes.
>
> > > > It seems I have to create a image with mkimage?
>
> you can store e.g. fpga.bin as a single file inside jffs, read it and
> load your fpga.
>
> > > no - Lattice specififc bitstream can be stored in raw format.
> > > mkimage may be useful for update, but personally I prefer update via
> > > dedicated linux mtd partition.
> > >
> > > > This image have to be loaded into ram and the address has to be
> > > > provided to the load command?
> > >
> > > Usually an FPGA is *very* board specific. I'd suggest to use flash and
> > > create a corresponding mtd partition for linux, i.e. make it
> > > maintainable.
> >
> > Seems to be a good way.
>
> yes - but not for jffs2 on NAND. You can use a plain binary file
> instead.
>
> > Is there a cmd in u-boot to read a file from a jffs2 filesystem inside a
> > nand flash partition?
>
> Have a look at the end of common/cmd_jffs2.c : fsload is the one for
> you.
>
Thanks for that link :)

> > > > Is there a maintainer for the FPGA code inside u-boot?
> > > > I'm willing to contribute some extensions for Lattice FPGAs if I'm
> > > > successful!
> > >
> > > excellent - all you'll need is the Lattice specific bit toggle
> > > sequence.
> > >
> > > submitting a proper patch will surely do.
> >
> > I'm trying to get an idea what place is the best to integrate the lattice
> > architecture in to the fpga framework.
> > If I have any further questions - can I ask you again?
>
> of course, but since I'm a PowerPC user I can't tell anything specific
> to ARM ...
>
Thanks again!

So I would try to bring it up and see what happens :)

Dieter

>
> Cheers,
>
> Andr??
>
> > > Regards,
> > >
> > > Andr??
> >
> > Many thanks for helping,
> > Dieter
> >
> > > > Thanks to all,
> > > > Dieter
> > > > _______________________________________________
> > > > U-Boot mailing list
> > > > U-Boot at lists.denx.de
> > > > http://lists.denx.de/mailman/listinfo/u-boot
> > >
> > > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > > Hans-Joachim Reich
>
> MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
> Registergericht: Amtsgericht Stuttgart, HRB 271090
> Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[André Schwarz]

On Mon, 2009-06-22 at 11:00 +0200, Dieter Kiermaier wrote:
> Andr??,
> 
> > Dieter,
> >
> > On Mon, 2009-06-22 at 08:19 +0200, Dieter Kiermaier wrote:
> > > Andr??,
> > >
> > > > Dieter,
> > > >
> > > > On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > > > > Hello List,
> > > > >
> > > > > I want to boot a (Lattice) FPGA from u-boot by using Slave Serial
> > > > > configuration on a Marvell Kirkwood device.
> > > >
> > > > Should be no problem as long as you'll have access to GPIO.
> > >
> > > I'm working on it :)
> > > But more likely I would have the SPI controller to do the serializing of
> > > the bitstream. But maybe this would be the second step.
> >
> > Bitbanging is not critical and works pretty fast.
> > You definitely have to control maximum frequency and observe errors
> > during load. If you'll use SPI make sure to disconnect the bus from the
> > FPGA and keep the config pins in a sane state.
> >
> Do you have some time values how long your FPGA needs to boot by using 
> bitbanging?

less than a second.

> 
> > > > > As seen there is an (Xilinx and Altera) FPGA loader driver allready
> > > > > available in u-boot.
> > > > > Please can somebody explain how I have to provide a FPGA bitstream
> > > > > image to u-boot?
> > > >
> > > > The easiest way is to reserve some unused flash sectors and use the
> > > > first sector's start adress as arg for "fpga load".
> > >
> > > I assume this will only work with NOR flash, right?
> >
> > I'm using NOR flash, but it will work with any adressable memory.
> >
> > > If I'm using NAND flash I have to copy the image to ram first?
> >
> > yes.
> >
> > > > > It seems I have to create a image with mkimage?
> >
> > you can store e.g. fpga.bin as a single file inside jffs, read it and
> > load your fpga.
> >
> > > > no - Lattice specififc bitstream can be stored in raw format.
> > > > mkimage may be useful for update, but personally I prefer update via
> > > > dedicated linux mtd partition.
> > > >
> > > > > This image have to be loaded into ram and the address has to be
> > > > > provided to the load command?
> > > >
> > > > Usually an FPGA is *very* board specific. I'd suggest to use flash and
> > > > create a corresponding mtd partition for linux, i.e. make it
> > > > maintainable.
> > >
> > > Seems to be a good way.
> >
> > yes - but not for jffs2 on NAND. You can use a plain binary file
> > instead.
> >
> > > Is there a cmd in u-boot to read a file from a jffs2 filesystem inside a
> > > nand flash partition?
> >
> > Have a look at the end of common/cmd_jffs2.c : fsload is the one for
> > you.
> >
> Thanks for that link :)
> 
> > > > > Is there a maintainer for the FPGA code inside u-boot?
> > > > > I'm willing to contribute some extensions for Lattice FPGAs if I'm
> > > > > successful!
> > > >
> > > > excellent - all you'll need is the Lattice specific bit toggle
> > > > sequence.
> > > >
> > > > submitting a proper patch will surely do.
> > >
> > > I'm trying to get an idea what place is the best to integrate the lattice
> > > architecture in to the fpga framework.
> > > If I have any further questions - can I ask you again?
> >
> > of course, but since I'm a PowerPC user I can't tell anything specific
> > to ARM ...
> >
> Thanks again!
> 
> So I would try to bring it up and see what happens :)

yes - to get it done quickly I'd recommend to add a new Lattice device
family. Please create e.g. drivers/fpga/lattice.c and lattice_ecp3.c
(matching your device) according to the xilinx and altera templates.
It will integrate into common/cmd_fpga.c smoothly.

GPIO accessor functions have to be defined inside the board specific
code. If you definitely want to use spi please do it there, i.e. *not*
in the general code unless this is useful for all boards.

You can have a look at board/matrix_vision/mvbc_p/fpga.c+h

Regards,

Andr??

> 
> Dieter
> 
> >
> > Cheers,
> >
> > Andr??
> >
> > > > Regards,
> > > >
> > > > Andr??
> > >
> > > Many thanks for helping,
> > > Dieter
> > >
> > > > > Thanks to all,
> > > > > Dieter
> > > > > _______________________________________________
> > > > > U-Boot mailing list
> > > > > U-Boot at lists.denx.de
> > > > > http://lists.denx.de/mailman/listinfo/u-boot
> > > >
> > > > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > > > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > > > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > > > Hans-Joachim Reich
> >
> > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > Hans-Joachim Reich
> 
> 



MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
Registergericht: Amtsgericht Stuttgart, HRB 271090
Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner, Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[Dieter Kiermaier]

Am Montag 22 Juni 2009 11:17:34 schrieb Andr?? Schwarz:
> On Mon, 2009-06-22 at 11:00 +0200, Dieter Kiermaier wrote:
> > Andr??,
> >
> > > Dieter,
> > >
> > > On Mon, 2009-06-22 at 08:19 +0200, Dieter Kiermaier wrote:
> > > > Andr??,
> > > >
> > > > > Dieter,
> > > > >
> > > > > On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > > > > > Hello List,
> > > > > >
> > > > > > I want to boot a (Lattice) FPGA from u-boot by using Slave Serial
> > > > > > configuration on a Marvell Kirkwood device.
> > > > >
> > > > > Should be no problem as long as you'll have access to GPIO.
> > > >
> > > > I'm working on it :)
> > > > But more likely I would have the SPI controller to do the serializing
> > > > of the bitstream. But maybe this would be the second step.
> > >
> > > Bitbanging is not critical and works pretty fast.
> > > You definitely have to control maximum frequency and observe errors
> > > during load. If you'll use SPI make sure to disconnect the bus from the
> > > FPGA and keep the config pins in a sane state.
> >
> > Do you have some time values how long your FPGA needs to boot by using
> > bitbanging?
>
> less than a second.
>
Thats fine!

> > > > > > As seen there is an (Xilinx and Altera) FPGA loader driver
> > > > > > allready available in u-boot.
> > > > > > Please can somebody explain how I have to provide a FPGA
> > > > > > bitstream image to u-boot?
> > > > >
> > > > > The easiest way is to reserve some unused flash sectors and use the
> > > > > first sector's start adress as arg for "fpga load".
> > > >
> > > > I assume this will only work with NOR flash, right?
> > >
> > > I'm using NOR flash, but it will work with any adressable memory.
> > >
> > > > If I'm using NAND flash I have to copy the image to ram first?
> > >
> > > yes.
> > >
> > > > > > It seems I have to create a image with mkimage?
> > >
> > > you can store e.g. fpga.bin as a single file inside jffs, read it and
> > > load your fpga.
> > >
> > > > > no - Lattice specififc bitstream can be stored in raw format.
> > > > > mkimage may be useful for update, but personally I prefer update
> > > > > via dedicated linux mtd partition.
> > > > >
> > > > > > This image have to be loaded into ram and the address has to be
> > > > > > provided to the load command?
> > > > >
> > > > > Usually an FPGA is *very* board specific. I'd suggest to use flash
> > > > > and create a corresponding mtd partition for linux, i.e. make it
> > > > > maintainable.
> > > >
> > > > Seems to be a good way.
> > >
> > > yes - but not for jffs2 on NAND. You can use a plain binary file
> > > instead.
> > >
> > > > Is there a cmd in u-boot to read a file from a jffs2 filesystem
> > > > inside a nand flash partition?
> > >
> > > Have a look at the end of common/cmd_jffs2.c : fsload is the one for
> > > you.
> >
> > Thanks for that link :)
> >
> > > > > > Is there a maintainer for the FPGA code inside u-boot?
> > > > > > I'm willing to contribute some extensions for Lattice FPGAs if
> > > > > > I'm successful!
> > > > >
> > > > > excellent - all you'll need is the Lattice specific bit toggle
> > > > > sequence.
> > > > >
> > > > > submitting a proper patch will surely do.
> > > >
> > > > I'm trying to get an idea what place is the best to integrate the
> > > > lattice architecture in to the fpga framework.
> > > > If I have any further questions - can I ask you again?
> > >
> > > of course, but since I'm a PowerPC user I can't tell anything specific
> > > to ARM ...
> >
> > Thanks again!
> >
> > So I would try to bring it up and see what happens :)
>
> yes - to get it done quickly I'd recommend to add a new Lattice device
> family. Please create e.g. drivers/fpga/lattice.c and lattice_ecp3.c
> (matching your device) according to the xilinx and altera templates.
> It will integrate into common/cmd_fpga.c smoothly.
>
> GPIO accessor functions have to be defined inside the board specific
> code. If you definitely want to use spi please do it there, i.e. *not*
> in the general code unless this is useful for all boards.
>
> You can have a look at board/matrix_vision/mvbc_p/fpga.c+h
>

Ahh, thats what I want to hear. This will save much time to figure  it all 
out.
Sorry, but I'm a newbie compared with all these experts here. So what is clear 
for everybody isn't clear for me (at least until now...)
But hopefully this becomes better :)

Many thanks!
Cheers,
Dieter


> Regards,
>
> Andr??
>
> > Dieter
> >
> > > Cheers,
> > >
> > > Andr??
> > >
> > > > > Regards,
> > > > >
> > > > > Andr??
> > > >
> > > > Many thanks for helping,
> > > > Dieter
> > > >
> > > > > > Thanks to all,
> > > > > > Dieter
> > > > > > _______________________________________________
> > > > > > U-Boot mailing list
> > > > > > U-Boot at lists.denx.de
> > > > > > http://lists.denx.de/mailman/listinfo/u-boot
> > > > >
> > > > > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > > > > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > > > > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > > > > Hans-Joachim Reich
> > >
> > > MATRIX VISION GmbH, Talstrae 16, DE-71570 Oppenweiler
> > > Registergericht: Amtsgericht Stuttgart, HRB 271090
> > > Geschftsfhrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> > > Hans-Joachim Reich
>
> MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler
> Registergericht: Amtsgericht Stuttgart, HRB 271090
> Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner,
> Hans-Joachim Reich

[U-Boot] Question regarding FPGA firmware load in u-boot

[Dieter Kiermaier]

Prafulla,


> > -----Original Message-----
> > From: u-boot-bounces at lists.denx.de
> > [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Dieter Kiermaier
> > Sent: Monday, June 22, 2009 2:30 PM
> > To: Andr? Schwarz
> > Cc: u-boot at lists.denx.de
> > Subject: Re: [U-Boot] Question regarding FPGA firmware load in u-boot
> >
> > Andr?,
> >
> > > Dieter,
> > >
> > > On Mon, 2009-06-22 at 08:19 +0200, Dieter Kiermaier wrote:
> > > > Andr?,
> > > >
> > > > > Dieter,
> > > > >
> > > > > On Fri, 2009-06-19 at 17:46 +0200, Dieter Kiermaier wrote:
> > > > > > Hello List,
> > > > > >
> > > > > > I want to boot a (Lattice) FPGA from u-boot by using Slave
> > > > > > Serial configuration on a Marvell Kirkwood device.
> > > > >
> > > > > Should be no problem as long as you'll have access to GPIO.
> > > >
> > > > I'm working on it :)
> > > > But more likely I would have the SPI controller to do the
> > > > serializing of the bitstream. But maybe this would be the
> >
> > second step.
>
> Hi
> Pls see my patch, hopefully this is useful for you
> http://lists.denx.de/pipermail/u-boot/2009-June/053605.html

Thanks for pointing to it.
But as I tried to explain, the common SPI driver is useless for my board due 
to the kirkwood pin multiplexing. Thats why I asked for a TDM module based 
SPI driver in the past.
(Please see my comment on the openplug wiki from today morning for a more 
detailed explanation)

Dieter


> Regards..
> Prafulla . .