[U-Boot] Incorrect Chip ID for Micrel Nand Flash on AT91SAM9260 board

[U-Boot] Incorrect Chip ID for Micrel Nand Flash on AT91SAM9260 board

[Kevin Greer]

Hello,

I am working with a custom board based on the Atmel at91sam9260 arm
processor with a Micrel 2 Gb Nand flash chip (mt29f2g08aadwp).  However,
when u-boot starts it reports the wrong Chip ID (0x01 instead of 0xda) and
then I start getting Bad eraseblock messages during the rest of the boot
process.  The strange thing is that when I debug the board using a JTAG it
gets the correct Chip ID and boots properly.  I am hoping that someone else
might have run into a similar problem, or might have an idea of how to
proceed.

Thanks,
   Kevin

[U-Boot] Incorrect Chip ID for Micrel Nand Flash on AT91SAM9260 board

[Eric BENARD]

Hi Kevin,

Kevin Greer a ?crit :
> I am working with a custom board based on the Atmel at91sam9260 arm
> processor with a Micrel 2 Gb Nand flash chip (mt29f2g08aadwp).  However,
> when u-boot starts it reports the wrong Chip ID (0x01 instead of 0xda) and
> then I start getting Bad eraseblock messages during the rest of the boot
> process.  The strange thing is that when I debug the board using a JTAG it
> gets the correct Chip ID and boots properly.  I am hoping that someone else
> might have run into a similar problem, or might have an idea of how to
> proceed.
> 
try sending a reset command to the nand before getting the ID, this 
should solve the problem.

Eric