[U-Boot] SPL variant of sunxi nand module

[Michael Nazzareno Trimarchi]

Hi

On Sun, Dec 23, 2018 at 4:46 PM Nikolai Zhubr <n-a-zhubr at yandex.ru> wrote:
>
> Hi again,
>
> 23.12.2018 16:29, I wrote:
> >  > U-Boot SPL 2019.01-rc2 (Dec 20 2018 - 16:30:46 +0300)
> >  > CPU: 912000000Hz, AXI/AHB/APB: 3/2/2
> >  > DRAM: 1024 MiB
> >  > Trying to boot from NAND
> >
>
> Ok, discovered a special SPL-only sunxi_nand_spl variant, added some
> debugging, so the detection is visible:
>
> In nand_detect_config(), start detection...
> Considering addr_cycles=5, page_size=2048
>   Considering ecc_size=1024, ecc_strength=0 failed(a).
> Considering addr_cycles=5, page_size=2048 rejected.
> Considering addr_cycles=5, page_size=4096
>   Considering ecc_size=1024, ecc_strength=3 failed(a).
> Considering addr_cycles=5, page_size=4096 rejected.
> Considering addr_cycles=5, page_size=8192
>   Considering ecc_size=1024, ecc_strength=4 good(b).
> Considering addr_cycles=5, page_size=8192 accepted.
>
> I'm almost 100% sure that correct config would be page_size=8192,
> ecc_size=1024, ecc_strength=40 (from nand chip identification structure
> for regular linux kernel)

That is an index on an array. Am I wrong? so the max is 74

Michael

>
> Now the detection routine in sunxi_nand_spl apparently comes up with a
> value of ecc_strength=4 instead... Why is that?

n - 1 using an index, if the code that I have is aligned so

Michael

>
>
> Thank you,
>
> Regards,
> Nikolai
>
>
> >
> >
> > Thank you,
> >
> > Regards,
> > Nikolai
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>
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