Man page 9 : nand_read_page_hwecc_oob_first

nand_read_page_hwecc_oob_first - [REPLACEABLE] hw ecc, read oob first

int nand_read_page_hwecc_oob_first(struct mtd_info *  mtd , struct nand_chip *  chip , uint8_t *  buf , int  oob_required , int  page );

mtd
    mtd info structure

chip
    nand chip info structure

buf
    buffer to store read data

oob_required
    caller requires OOB data read to chip->oob_poi

page
    page number to read

Hardware ECC for large page chips, require OOB to be read first. For this ECC mode, the write_page method is re-used from ECC_HW. These methods read/write ECC from the OOB area, unlike the ECC_HW_SYNDROME support with multiple ECC steps, follows the « infix ECC » scheme and reads/writes ECC from the data area, by overwriting the NAND manufacturer bad block markings.

Thomas Gleixner <>
    Author.