Sequoia NAND

Sequoia NAND

[Steve Heflin]

I don't see where the new powerpc architecture and drivers/mtd/nand 
contains support for the NAND chip on the Sequoia platform.  We have 
a Linux 2.6.14 kit where Montavista has a driver in "sequoia_nand.c" 
which interfaces with the NAND device via NAND Flash Control registers:
    struct ppc440ep_ndfc_regs *sequoia_ndfc;
where:
    struct ppc440ep_ndfc_regs {
         uint cmd;
         uint addr;
         uint data;
         uint reserved1;
         uint ecc0;
         uint ecc1;
         uint ecc2;
         uint ecc3;
         uint ecc4;
         uint ecc5;
         uint ecc6;
         uint ecc7;
         uint b0cr;
         uint b1cr;
         uint b2cr;
         uint b3cr;
         uint cr;
         uint sr;
         uint hwctl;
         uint reserved2;
         uint revid;
};

Is the Sequoia's NAND Flash Controller supported in the current Linux-2.6.25?

thanks,
Steve

Re: Sequoia NAND

[Josh Boyer]

On Sun, 17 Feb 2008 06:39:43 -0500
Steve Heflin <sheflin@newagemicro.com> wrote:

> I don't see where the new powerpc architecture and drivers/mtd/nand 
> contains support for the NAND chip on the Sequoia platform.  We have 

It's not.

> Is the Sequoia's NAND Flash Controller supported in the current Linux-2.6.25?

No.

There are a couple different patches floating around for it, all of
which need work.  The driver is drivers/mtd/nand/ndfc.c and work needs
to be done to parse a device tree and present the proper platform
devices so that driver will work.  Stefan has something like this
somewhere, I've just been lax in getting it into my tree.

Too late for .25, but I have 4 boards that use this now so I'll be a
bit more interested in getting it into .26.

josh

Re: Sequoia NAND - others missing?

[Steve Heflin]

Are there other devices (beside the NAND Flash Controller) that exist 
on the AMCC-440EPx chip and are not supported by the current 
Linux-2.6.25 ARCH=powerpc?

thanks for your help,
Steve

At 08:18 AM 2/17/2008, Josh Boyer wrote:
>On Sun, 17 Feb 2008 06:39:43 -0500
>Steve Heflin <sheflin@newagemicro.com> wrote:
>
> > I don't see where the new powerpc architecture and drivers/mtd/nand
> > contains support for the NAND chip on the Sequoia platform.  We have
>
>It's not.
>
> > Is the Sequoia's NAND Flash Controller supported in the current 
> Linux-2.6.25?
>
>No.
>
>There are a couple different patches floating around for it, all of
>which need work.  The driver is drivers/mtd/nand/ndfc.c and work needs
>to be done to parse a device tree and present the proper platform
>devices so that driver will work.  Stefan has something like this
>somewhere, I've just been lax in getting it into my tree.
>
>Too late for .25, but I have 4 boards that use this now so I'll be a
>bit more interested in getting it into .26.
>
>josh

Re: Sequoia NAND - others missing?

[Steve Heflin]

Are there other devices (beside the NAND Flash Controller) that exist 
on the AMCC-440EPx chip and are not supported by the current 
Linux-2.6.25 ARCH=powerpc?

thanks for your help,
Steve

At 08:18 AM 2/17/2008, Josh Boyer wrote:
>On Sun, 17 Feb 2008 06:39:43 -0500
>Steve Heflin <sheflin@newagemicro.com> wrote:
>
> > I don't see where the new powerpc architecture and drivers/mtd/nand
> > contains support for the NAND chip on the Sequoia platform.  We have
>
>It's not.
>
> > Is the Sequoia's NAND Flash Controller supported in the current 
> Linux-2.6.25?
>
>No.
>
>There are a couple different patches floating around for it, all of
>which need work.  The driver is drivers/mtd/nand/ndfc.c and work needs
>to be done to parse a device tree and present the proper platform
>devices so that driver will work.  Stefan has something like this
>somewhere, I've just been lax in getting it into my tree.
>
>Too late for .25, but I have 4 boards that use this now so I'll be a
>bit more interested in getting it into .26.
>
>josh

Re: Sequoia NAND - others missing?

[Josh Boyer]

On Sun, 17 Feb 2008 10:27:22 -0500
Steve Heflin <sheflin@newagemicro.com> wrote:

> Are there other devices (beside the NAND Flash Controller) that exist 
> on the AMCC-440EPx chip and are not supported by the current 
> Linux-2.6.25 ARCH=powerpc?

i2c, GPIO, the security stuff (if your version has that), and GPT.
Thought GPT has never really been supported in any kernel that I
remember.

Patches for i2c and GPIO are floating around somewhere I think.  Just
need to get them polished up and device-tree compliant.

josh

Re: Sequoia NAND - others missing?

[Steve Heflin]

Looking at the "arch/ppc/platforms/4xx/sequoia.c" from 2.6.14 
MontaVista, I also see ECC error handling, a Serial RTC device, UART4 
to UART11. It doesn't look like those are supported in the current 
"arch/powerpc/platforms/44x/sequoia" ?

Regarding the nftd NAND driver, I see a device table hookup in 
"arch/powerpc/platforms/44x/warp-nand.c".  Am I right in saying that 
file is a perfect template from which to generate sequoia-nand.c ?

thanks,
Steve


At 03:56 PM 2/17/2008, you wrote:
>On Sun, 17 Feb 2008 10:27:22 -0500
>Steve Heflin <sheflin@newagemicro.com> wrote:
>
> > Are there other devices (beside the NAND Flash Controller) that exist
> > on the AMCC-440EPx chip and are not supported by the current
> > Linux-2.6.25 ARCH=powerpc?
>
>i2c, GPIO, the security stuff (if your version has that), and GPT.
>Thought GPT has never really been supported in any kernel that I
>remember.
>
>Patches for i2c and GPIO are floating around somewhere I think.  Just
>need to get them polished up and device-tree compliant.
>
>josh
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