On 04/13/2012 01:12 PM, Timo Ketola wrote:
On 13.04.2012 20:19, Scott Wood wrote:
On 04/13/2012 06:20 AM, Timo Ketola wrote:
First two bytes of the first OOB of erase block are reserved for factory bad block marking, usually.
Signed-off-by: Timo Ketolatimo@exertus.fi
drivers/mtd/nand/mxc_nand.c | 35 +++++++++++++++++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-)
So what happened before? The default is at offset 8, which doesn't conflict with the bad block marker. It seems the actual issue is a conflict with ECC?
You seem to be right. I think I was badly confused with the kernel behaviour.
It looks like Linux wants the BBT to be at offset zero. Is there any plan to fix that? The two really should match...
What about 8-bit small page support, in which case the bad block marker is at offset 5?
What about putting into the block
#if defined(MXC_NFC_V1) #ifndef CONFIG_SYS_NAND_LARGEPAGE
defines for pattern and version offsets and use them in bbt_*_descr initializations?
Sure.
Or should they be in board configuration file?
I don't think it belongs in the board config file (unless there's existing behavior that has to be matched for compatibility on a specific board).
-Scott