The LS1021A Linux NAND driver provided with the QorIQ Linux SDK 2.0 does not provide raw read/write operations. E.g. the following command does not return the page data with bit flips but with the bit flips corrected:
nanddump -n -o -s 0 -l 4096 -f /tmp/page0-oob /dev/mtd1
and the following command re-calculates the ECCs in the OOB rather than writing the OOB provided in the file page0-oob-8f:
nandwrite -n -o -s 0x2ff000 /dev/mtd1 page0-oob-8f
Note: page0-oob-8f is page0-oob of the nanddump command but with 8 bit flips edited by an hex editor.