[flashrom] Erase error with hardware sequencing

Stefan Tauner stefan.tauner at student.tuwien.ac.at
Tue Mar 27 02:38:32 CEST 2012


On Tue, 27 Mar 2012 05:16:45 +0530
narayanan best <narayananbest at gmail.com> wrote:

>  Thanks for pointing out layout option. But it still accepts 16MB image as
> argument.

true, but it will only "use" the part that is needed to fill the
address range defined by the layout file. so this should be already
sufficient for you?

>   Is there a way where i can select the second chip and give only 8MB image
> file ?.

not without patches. there is a patch to specify a file per layout
image: http://patchwork.coreboot.org/patch/3486/

> 
> Just curious:
> 
>   How to select the SPI flash chip using CS on ICH9 ? ICH9 doc states that
> CS can used to select the chip but
>   didn't have enough information on how to program CS.
> 
>   Is hwseq only solution for accessing multiple chips ?.

afaik hwseq is the only option because there is no (publicly
documented?) access to any register that allows to toggle CS by the
host software. we have studied all public and some non-public intel
documents to no avail.
-- 
Kind regards/Mit freundlichen Grüßen, Stefan Tauner




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