Hi,
Jon Povey a écrit :
But I can't seem to write it back properly using nandwrite.
Testing on another partition mtd6, If I do this:
nandwrite -r -s 0x20000 /dev/mtd6 ubl0.dump
then it seems my 64 bytes of "OOB" are skipped and I get a generated 24 bytes
of 0xFF spare and 40 bytes of generated ECC.
If I use --noecc --oob instead of -r, it looks like my 64 bytes of "OOB" does
get written, but then hardware ECC is getting written OVER THE TOP, i.e. the last 40
bytes have various bits 0 that should be 1 (but no 1s that should be 0)
I am looking through the nandwrite and drivers/mtd sources at the moment, but
would love to get a clue if someone can tell me
- Does MTD support what I'm trying to do from userland?
yes write in raw mode + MEMWRITEOOB. But you will need 2 number of program.
- If yes, could this be a bug in the DaVinci NAND driver?
- Or, is nandwrite supposed to support this? or do I need to modify it?
I don't know nandwrite
Matthieu.
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