[U-Boot] NAND read error on Sequoia

[Wolfgang Denk]

Dear Stefan Roese,

In message <200912090709.18420.sr at denx.de> you wrote:
> 
> [Added Scott to Cc]
> 
> On Tuesday 08 December 2009 23:03:28 Wolfgang Denk wrote:
> > it seems there is a problem with NAND on Sequoia:
> > 
> > 	U-Boot 2009.11-rc2 (Dec 08 2009 - 22:52:34)
> > 	...
> > 	NAND:  32 MiB
> > 	...
> > 	=> nand read 200000 0 2000000
> > 
> > 	NAND read: device 0 whole chip
> > 	Attempt to read outside the flash area
> > 	 33554432 bytes read: ERROR
> > 
> > As you can see, I try to read the whole device (32 MB), which is
> > actually detectd correctly ("device 0 whole chip"), but then is
> > misinterpreted ("outside the flash area").
> 
> I don't think that this is a Sequoia (4xx NDFC) specific problem. My first  
> idea was that this is caused because of bad blocks. Bad blocks are skipped 
> upon read, but "nand read" still wants to read 32MByte in total. Which is not 
> possible when bad blocks are available.
> 
> But this is not the case here. I just verified this on sequoia (most likely 
> the one you used). No bad blocks here. And it still fails. Reading with one 
> block (block size 16k) less seems to be ok though:
> 
> => nand read 200000 0 1ffc000
> 
> NAND read: device 0 offset 0x0, size 0x1ffc000
>  33538048 bytes read: OK
> 
> And just reading the last block also doesn't work:
> 
> => nand read 200000 1ffc000 4000
> 
> NAND read: device 0 offset 0x1ffc000, size 0x4000
> Attempt to read outside the flash area
>  16384 bytes read: ERROR
> 
> Not sure why this is the case. Perhaps an "off by one" error? Scott do you 
> have an idea?

Any progress on this?

Best regards,

Wolfgang Denk

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