[U-Boot] Is anyone working on NAND support for Armada-XP?

[U-Boot] Is anyone working on NAND support for Armada-XP?

[Chris Packham]

Hi,

I find myself in need of a NAND flash controller.

I could probably massage the one from Marvell's bootloader into shape
which actually appears to be based on the pxa3xx_nand.c driver from
Linux. It appears that there was some effort put into adding a pxa3xx
driver a while back[1] but that thread appears to end with the patch
being dropped.

Is there anything more current that I could nudge along? Or should I
just start with porting Marvell's one.

Thanks,
Chris
--
[1] - http://lists.denx.de/pipermail/u-boot/2010-July/073610.html

[U-Boot] Is anyone working on NAND support for Armada-XP?

[Marek Vasut]

On Tuesday, February 24, 2015 at 06:18:00 AM, Chris Packham wrote:
> Hi,

Hi,

> I find myself in need of a NAND flash controller.
> 
> I could probably massage the one from Marvell's bootloader into shape
> which actually appears to be based on the pxa3xx_nand.c driver from
> Linux. It appears that there was some effort put into adding a pxa3xx
> driver a while back[1] but that thread appears to end with the patch
> being dropped.

Yeah, I never got to fixing it proper in the end.

> Is there anything more current that I could nudge along? Or should I
> just start with porting Marvell's one.

Maybe you should just start porting the PXA3xx one from Linux ? That
one is the highest quality right now to my knowledge.

Best regards,
Marek Vasut

[U-Boot] Is anyone working on NAND support for Armada-XP?

[Chris Packham]

On Wed, Feb 25, 2015 at 8:43 AM, Marek Vasut <marex@denx.de> wrote:
> On Tuesday, February 24, 2015 at 06:18:00 AM, Chris Packham wrote:
>> Hi,
>
> Hi,
>
>> I find myself in need of a NAND flash controller.
>>
>> I could probably massage the one from Marvell's bootloader into shape
>> which actually appears to be based on the pxa3xx_nand.c driver from
>> Linux. It appears that there was some effort put into adding a pxa3xx
>> driver a while back[1] but that thread appears to end with the patch
>> being dropped.
>
> Yeah, I never got to fixing it proper in the end.

Was the old attempt a port or an implementation from scratch?

>> Is there anything more current that I could nudge along? Or should I
>> just start with porting Marvell's one.
>
> Maybe you should just start porting the PXA3xx one from Linux ? That
> one is the highest quality right now to my knowledge.

Any idea of of how close to "the u-boot way" the Linux driver is? I
haven't started looking at it yet.

I might need to do something expedient for my needs right now and come
back to doing a proper port later. The Marvell one is at least
implemented for u-boot, albeit v2013.01 and with their horrible USP
style. But if the port from Linux is relatively trivial it might be
easier to do than to catch the Marvell code up with 2 years of u-boot
development.

[U-Boot] Is anyone working on NAND support for Armada-XP?

[Marek Vasut]

On Tuesday, February 24, 2015 at 09:03:15 PM, Chris Packham wrote:
> On Wed, Feb 25, 2015 at 8:43 AM, Marek Vasut <marex@denx.de> wrote:
> > On Tuesday, February 24, 2015 at 06:18:00 AM, Chris Packham wrote:
> >> Hi,
> > 
> > Hi,
> > 
> >> I find myself in need of a NAND flash controller.
> >> 
> >> I could probably massage the one from Marvell's bootloader into shape
> >> which actually appears to be based on the pxa3xx_nand.c driver from
> >> Linux. It appears that there was some effort put into adding a pxa3xx
> >> driver a while back[1] but that thread appears to end with the patch
> >> being dropped.
> > 
> > Yeah, I never got to fixing it proper in the end.
> 
> Was the old attempt a port or an implementation from scratch?

The one from OpenPXA was a port of the PXA3xx NAND driver from Linux.
It was done by Igor Grinberg to my knowledge.

> >> Is there anything more current that I could nudge along? Or should I
> >> just start with porting Marvell's one.
> > 
> > Maybe you should just start porting the PXA3xx one from Linux ? That
> > one is the highest quality right now to my knowledge.
> 
> Any idea of of how close to "the u-boot way" the Linux driver is? I
> haven't started looking at it yet.

The MTD subsystem in U-Boot is imported from Linux and periodically synced.
This task should be pretty easy.

> I might need to do something expedient for my needs right now and come
> back to doing a proper port later. The Marvell one is at least
> implemented for u-boot, albeit v2013.01 and with their horrible USP
> style. But if the port from Linux is relatively trivial it might be
> easier to do than to catch the Marvell code up with 2 years of u-boot
> development.

Well, I can understand why you'd like to avoid Marvell BSP all right ;-)

Best regards,
Marek Vasut