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MLC NANDs have more bit flips that SLC. When looking for bad block marker we have a lot of false positive if we check for the whole byte. To avoid this tolerate a few (4 here) bit flips for byte.
Reset NAND before write protect check.
For MLC NAND, paired page issue is now a common known issue. This patch is just for master node cannot be recovered while there will two pages be dameged in one single master block.
These patches aim to solve MLC NAND paired page power loss issue by adding a bakvol (backup volume) module in UBI layer. 70 series and 80 series families.
If the bitflips num over mtd->bitflip_threshold the mtd_read_oob will return -EUCLEAN and tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR. Then we will call yaffs_handle_chunk_error.
S805 Flash Translation Layer patch install package for chipset vendors only.
General low-level driver for legacy Numonyx very large page SLC NAND. Download the technical note for this driver here.
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