Hi Boris,

2016-11-30 17:17 GMT+09:00 Boris Brezillon <boris.brezil...@free-electrons.com>:

>> [3]
>> Fix raw and oob callbacks.
>> I asked in another thread,
>> the current driver just puts the physically accessed OOB data
>> into oob_poi, which is not a collection of ECC data.
>> Raw write/read() are wrong as well.
> That's all good things too.
>> After fixing those, enable BBT scan by removing the following flag:
>>     /* skip the scan for now until we have OOB read and write support */
>>     chip->options |= NAND_SKIP_BBTSCAN;
> Hm, here you have a problem. The layout you described replaces BBMs by
> payload data, thus preventing the BBM scan approach (or at least, it
> won't work with factory BBMs).

As I answered in another mail, the Denali IP expects BBMs
at the beginning of each OOB area (standard location).
They are protected from the ECC engine.

I just did not mention the BBM-reserved area
to make the story simpler.

So, after fixing oob read/write functions,
the driver will be able to enable BBT-scanning.

Best Regards
Masahiro Yamada

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