[U-Boot] Nand dump and nand bad block disagree

[Scott Wood]

On 02/29/2012 04:34 PM, Mike Frysinger wrote:
> On Wednesday 29 February 2012 14:09:44 Scott Wood wrote:
>> On 02/29/2012 01:06 PM, Mike Frysinger wrote:
>>> On Wednesday 29 February 2012 04:02:39 jean-philippe francois wrote:
>>>> Le 29 février 2012 00:40, Scott Wood a écrit :
>>>>> Is this a 16-bit NAND?  If so, the first two bytes have to be 0xffff,
>>>>> unless the controller driver defines the bad block pattern differently.
>>>>
>>>> It is an 8 bit nand. The badblock patern can be redefined by the
>>>> controller driver to be different from the one in nand_base.c ? Do you
>>>> have an example of this ?
>>>
>>> look at the Blackfin nand driver (in u-boot and linux).  we have to
>>> override the badblock layout because our on-chip boot rom expects
>>> something other than what linux uses.
>>
>> But be careful when doing this -- it really should match what
>> manufacturers will write.
> 
> yep
> 
> on the Blackfin side, nothing to be done now.  the rom team didn't consult with 
> the linux team before implementing things, and these roms are fixed in the 
> processor, and they can't change now without breaking backwards compat.

Do you migrate the bad block markers to the new location prior to using
a chip?

-Scott