[Buildroot] Flash for AT91RM9200

[Buildroot] Flash for AT91RM9200

[Joe]

Hi you all!

I'm looking for a NOR-Flash for a RM9200-based board, and i thought 
maybe some of you could give some hints or experiences.
Basically it should be 128MByte size, with larger drop-in replacements 
as a favorable option. As with all RM9200 parallel flash, must have CFI, 
and must be available in a non-BGA package.
For a first guess, i found the Spansion S29G128P - any experiences with 
that one? How well is it supported by the kernel, or are there any 
obvious caveats that i overlooked now?

Greetz, Joe

-- 
Sepp "ZaP" Holzmayr

please reply to: zentrale.at.work at gmail.com
"Never underestimate the bandwidth of a freight train full of DAT tapes. 
Only the round-trip is a little suboptimal."

[Buildroot] Flash for AT91RM9200

[Samuelsson, Ulf]

Hi you all!

I'm looking for a NOR-Flash for a RM9200-based board, and i thought 
maybe some of you could give some hints or experiences.
Basically it should be 128MByte size, with larger drop-in replacements 
as a favorable option. As with all RM9200 parallel flash, must have CFI, 
and must be available in a non-BGA package.
For a first guess, i found the Spansion S29G128P - any experiences with 
that one? How well is it supported by the kernel, or are there any 
obvious caveats that i overlooked now?

Greetz, Joe

=> The AT91RM9200 has 
     26 Adress pins (A0-A5)
     but A24 is nol  available.
     (See Errata)
     This gives you a 16 MB
     linear adressrange.
     Since A25 is available
     you can have 2 x 16 MB
     spaces with a 16 MB
     hole in between.

    However, I suspect that
    you only plan 128 Mbit
    and not 128 MByte
    and then this is not
    a problem
    
    If you are starting a design
    now,You should perhaps
    consider the AT91SAM9260
    or  the  AT91SAMG20
    

-- 
Sepp "ZaP" Holzmayr

please reply to: zentrale.at.work at gmail.com
"Never underestimate the bandwidth of a freight train full of DAT tapes. 
Only the round-trip is a little suboptimal."
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[Buildroot] Flash for AT91RM9200

[Joe]

Samuelsson, Ulf schrieb:
>     If you are starting a design
>     now,You should perhaps
>     consider the AT91SAM9260
>     or  the  AT91SAMG20

Thanks Ulf!

I know the RM9200 is more a One-of-a-kind design and has numerous errata..
but does this imply that it will be eventually discontinued in the near 
future? I'm not really on a new design, so changing CPUs would be really 
painful if necessary. But changing now is surely better than having to 
change fast in 6 months f.e., if the RM9200 is discontinued.
Do you maybe have some insight into the lifecycle of the RM9200 and can 
possibly shed some light on this?

Thanks very much, Joe

-- 
Sepp "ZaP" Holzmayr

please reply to: zentrale.at.work at gmail.com
"Never underestimate the bandwidth of a freight train full of DAT tapes. 
Only the round-trip is a little suboptimal."

[Buildroot] Flash for AT91RM9200

[Jorge S.]

Hi All:

Regarding to this FLASH/Dataflash stuff...

I'm now facing a new board desing based on the AT91SAM9260 or the AVR32, we
are still on very early stages of the design.

Our big doubts are those concerning the DataFlash and NAND/NOR flash
selection.

Since there are several of erratas on this CPUs,and a little bit confused.
Can you please Ulf clarify what is working and what is not?

I'm planning to use *ONLY* nor/nand flash, and *not* use the Dataflash
because we don't want to
get constrained by storage capacity. So if we can use a BIG flash there's no
need for a spi dataflash.

Is it possible to boot from nand (or nor) flash on the AVR32 and the
AT91SAMxxxx series? if yes, can you please
provide part numbers for known working chips?.

Thanks in advance.


On Thu, Apr 3, 2008 at 2:26 PM, Samuelsson, Ulf <ulf.samuelsson@atmel.com>
wrote:

>
>
> Hi you all!
>
> I'm looking for a NOR-Flash for a RM9200-based board, and i thought
> maybe some of you could give some hints or experiences.
> Basically it should be 128MByte size, with larger drop-in replacements
> as a favorable option. As with all RM9200 parallel flash, must have CFI,
> and must be available in a non-BGA package.
> For a first guess, i found the Spansion S29G128P - any experiences with
> that one? How well is it supported by the kernel, or are there any
> obvious caveats that i overlooked now?
>
> Greetz, Joe
>
> > The AT91RM9200 has
>     26 Adress pins (A0-A5)
>     but A24 is nol  available.
>     (See Errata)
>     This gives you a 16 MB
>     linear adressrange.
>     Since A25 is available
>     you can have 2 x 16 MB
>     spaces with a 16 MB
>     hole in between.
>
>    However, I suspect that
>    you only plan 128 Mbit
>    and not 128 MByte
>    and then this is not
>    a problem
>
>    If you are starting a design
>    now,You should perhaps
>    consider the AT91SAM9260
>    or  the  AT91SAMG20
>
>
> --
> Sepp "ZaP" Holzmayr
>
> please reply to: zentrale.at.work at gmail.com
> "Never underestimate the bandwidth of a freight train full of DAT tapes.
> Only the round-trip is a little suboptimal."
> _______________________________________________
> buildroot mailing list
> buildroot at uclibc.org
> http://busybox.net/mailman/listinfo/buildroot
>
>
>
> _______________________________________________
> buildroot mailing list
> buildroot at uclibc.org
> http://busybox.net/mailman/listinfo/buildroot
>
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[Buildroot] Flash for AT91RM9200

[Hans-Christian Egtvedt]

On Fri, 2008-04-04 at 13:52 +0200, Jorge S. wrote:

<cut need for only one large flash device>

> Is it possible to boot from nand (or nor) flash on the AVR32 and the
> AT91SAMxxxx series? if yes, can you please
> provide part numbers for known working chips?.
> 

AVR32 AP700X supports boot from NOR flash only, and is limited by a 64
MB size of chip select 0 on the external bus interface.

AFAIK Atmel NOR flashes, some ST NOR flashes and Spansion NOR flashes
are supported. If you drop avr32 at atmel.com an email you will probably
get a known to work list.

I have seen board with AP7000 and 2 x 64 MB NOR flash working (-:

-- 
With kind regards,
Hans-Christian Egtvedt, Applications Engineer

[Buildroot] Flash for AT91RM9200

[Jorge S.]

Hi Hans:

Thanks for your urgent reply.

What do you think about a combo solution?

- SPI Dataflash for booting
- Some at least 128 MiB Flash for rootfs...

Any known problem on the AVR32 world with big nand flashes?

On Fri, Apr 4, 2008 at 2:14 PM, Hans-Christian Egtvedt <
hans-christian.egtvedt@atmel.com> wrote:

> On Fri, 2008-04-04 at 13:52 +0200, Jorge S. wrote:
>
> <cut need for only one large flash device>
>
> > Is it possible to boot from nand (or nor) flash on the AVR32 and the
> > AT91SAMxxxx series? if yes, can you please
> > provide part numbers for known working chips?.
> >
>
> AVR32 AP700X supports boot from NOR flash only, and is limited by a 64
> MB size of chip select 0 on the external bus interface.
>
> AFAIK Atmel NOR flashes, some ST NOR flashes and Spansion NOR flashes
> are supported. If you drop avr32 at atmel.com an email you will probably
> get a known to work list.
>
> I have seen board with AP7000 and 2 x 64 MB NOR flash working (-:
>
> --
> With kind regards,
> Hans-Christian Egtvedt, Applications Engineer
>
>
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[Buildroot] Flash for AT91RM9200

[Hans-Christian Egtvedt]

On Fri, 2008-04-04 at 14:54 +0200, Jorge S. wrote:
> Hi Hans:
> 
> Thanks for your urgent reply. 
> 
> What do you think about a combo solution? 
> 
> - SPI Dataflash for booting

Does not work for AVR32 devices, AVR32 AP700X only supports booting from
NOR flash. Will be changed in future devices though.

> - Some at least 128 MiB Flash for rootfs...
> 

Seems sane, depends on your application. I guess GUI with tons of
graphics?

> Any known problem on the AVR32 world with big nand flashes? 
> 

I have heard one report on 2 GB NAND device being slow to mount, but
that may be kernel JFFS2 related and/or extreme slow once when writing
cleanmarkers problem.

Others report 1 GB being fast and nifty.

PS! I only work with AVR32 products, so I have little knowledge about
the ARM line. I guess Ulf can fill in the missing spots.


-- 
With kind regards,
Hans-Christian Egtvedt, Applications Engineer