[U-Boot] NAND: bad block in whole chip

[Alemao]

Dont know if can be a hardware problem, cause NAND is found in localbus:

I just copy/paste nand_scan code (from nand_base.c) and try this:

With u-boot-1.1.4 + drivers from u-boot-1.3.4:

DDR RAM: 128 MB
FLASH: 16 MB
In:    serial
Out:   serial
Err:   serial
NAND:  64 MiB

=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00
=> nand scan

        Maf. ID: 0x20   -   Dev. ID: 0x76
=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00
=> nand scan

        Maf. ID: 0x20   -   Dev. ID: 0x76


Maf. ID: 0x20, Dev. ID: 0x76: the right nand, NAND512W3A2BN6E from STMICRO

And if I use another command like "nand bad", then I got just 0x00 in
all other "nand scan" commands.


Now with u-boot-1.1.4 + drivers from first upm release:

DDR RAM: 128 MB
FLASH: 16 MB
In:    serial
Out:   serial
Err:   serial
NAND:  64 MiB

=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00
=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00
=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00
=> nand scan

        Maf. ID: 0x00   -   Dev. ID: 0x00


0x00 in all tries.

Each version cause a different behavior, so not sure if can be hardware

Cheers,

--
Alemao
On Wed, Aug 13, 2008 at 11:44 AM, Stefan Roese <sr at denx.de> wrote:
> On Wednesday 13 August 2008, Alemao wrote:
>> Now i got all NAND stuffs from u-boot-1.3.4, including common/cmd_nand.c
>> and drivers/mtd/nand/*, but still the same problem.
>>
>> Other components of u-boot can influence NAND behavior?
>>
>> I saw some people with similar problem using "nand scrub", but im little
>> bit afraid with this command...
>
> Yes, you should be. Be careful with this command.
>
> Note that in all cases where I read all NAND blocks as bad, either the NAND
> driver had a problem or the hardware had a problem. Are you sure that the
> hardware is ok?
>
> Best regards,
> Stefan
>
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