[OpenWrt-Devel] MI424WR Rev I Hynix NAND Error

[James Hilliard]

I wrote the image to flash using tftp from uboot, I'm having trouble
isolating the cause of the ECC errors, what I'm not sure of is if
there's a quirk with the Hynix NAND that the Eon NAND doesn't have.

It would appear that the Hynix and Eon NAND chips are used
interchangeably for this router model(this was tested on 2 of the same
model where that appears to be the only difference), the odd part is
that the Eon NAND works without issue so I would assume that the Hynix
NAND is sensitive to a particular setting that the Eon is not as the
stock firmware does not appear to differentiate any settings between
the two NAND chips from what I could tell by looking at the stock
source code.

We tried changing the chip-delay parameter in the openwrt dtsi file to
match the GPL source
https://github.com/jameshilliard/actiontec_opensrc_mi424wr-rev-i_fw-40-21-18/blob/34b1f338344ebd36543c9fbcb4870bb6f6914cb8/rg/vendor/marvell/feroceon/linux-2.6/arch/arm/mach-feroceon-kw2/nand.c#L211
but that didn't seem to resolve the issue.

Would you have any suggestions on what I should try next or how to
debug this further?

Are there any non-standard settings in the GPL source that stand out
as needing to be configured in openwrt for this NAND chip to function
correctly?

On Wed, Mar 4, 2015 at 10:00 AM, Conor O'Gorman <i at conorogorman.net> wrote:
> On 22/02/15 01:36, James Hilliard wrote:
>>
>> I've been trying to install OpenWRT on an Actiontec MI424WR Rev I,
>> however some variants of this router use a Hynix NAND chip that OpenWRT
>> doesn't seem to be able to access. There are other versions of this
>> router that use a Eon NAND chip that works fine. I've attached the full
>> boot-log. The stock firmware is the same for both NAND Chips.
>>
>
> You have nand ECC errors. The flash detection looks reasonable.
>
> You need to check the ECC handling mode ie. software, hardware, etc. And you
> may want to check how you wrote the image to flash.
>
> Conor
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel