-/*
- Physical organisation of data in NAND flash:
- metadata
- payload chunk 0 (may be empty)
- ecc for metadata + payload chunk 0
- payload chunk 1
- ecc for payload chunk 1
-...
- payload chunk n
- ecc for payload chunk n
- */
-
-static inline int calc_bb_offset(nand_info_t *mtd, struct mx6_fcb *fcb)
-{
- int bb_mark_offset;
- int chunk_data_size = fcb->ecc_blockn_size * 8;
- int chunk_ecc_size = (fcb->ecc_blockn_type << 1) * 13;
- int chunk_total_size = chunk_data_size + chunk_ecc_size;
- int bb_mark_chunk, bb_mark_chunk_offs;
-
- bb_mark_offset = (mtd->writesize - fcb->metadata_size) * 8;
- if (fcb->ecc_block0_size == 0)
- bb_mark_offset -= (fcb->ecc_block0_type << 1) * 13;
-
- bb_mark_chunk = bb_mark_offset / chunk_total_size;
- bb_mark_chunk_offs = bb_mark_offset - (bb_mark_chunk * chunk_total_size);
- if (bb_mark_chunk_offs > chunk_data_size) {
- printf("Unsupported ECC layout; BB mark resides in ECC data: %u\n",
- bb_mark_chunk_offs);
- return -EINVAL;
- }
- bb_mark_offset -= bb_mark_chunk * chunk_ecc_size;
- return bb_mark_offset;
-}
-