diff options
| -rw-r--r-- | drivers/mtd/nand/diskonchip.c | 60 |
1 files changed, 45 insertions, 15 deletions
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index 547c1002941d..a023ab9e9cbf 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -950,20 +950,50 @@ static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, //u_char mydatabuf[528]; -/* The strange out-of-order .oobfree list below is a (possibly unneeded) - * attempt to retain compatibility. It used to read: - * .oobfree = { {8, 8} } - * Since that leaves two bytes unusable, it was changed. But the following - * scheme might affect existing jffs2 installs by moving the cleanmarker: - * .oobfree = { {6, 10} } - * jffs2 seems to handle the above gracefully, but the current scheme seems - * safer. The only problem with it is that any code that parses oobfree must - * be able to handle out-of-order segments. - */ -static struct nand_ecclayout doc200x_oobinfo = { - .eccbytes = 6, - .eccpos = {0, 1, 2, 3, 4, 5}, - .oobfree = {{8, 8}, {6, 2}} +static int doc200x_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section) + return -ERANGE; + + oobregion->offset = 0; + oobregion->length = 6; + + return 0; +} + +static int doc200x_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 1) + return -ERANGE; + + /* + * The strange out-of-order free bytes definition is a (possibly + * unneeded) attempt to retain compatibility. It used to read: + * .oobfree = { {8, 8} } + * Since that leaves two bytes unusable, it was changed. But the + * following scheme might affect existing jffs2 installs by moving the + * cleanmarker: + * .oobfree = { {6, 10} } + * jffs2 seems to handle the above gracefully, but the current scheme + * seems safer. The only problem with it is that any code retrieving + * free bytes position must be able to handle out-of-order segments. + */ + if (!section) { + oobregion->offset = 8; + oobregion->length = 8; + } else { + oobregion->offset = 6; + oobregion->length = 2; + } + + return 0; +} + +static const struct mtd_ooblayout_ops doc200x_ooblayout_ops = { + .ecc = doc200x_ooblayout_ecc, + .free = doc200x_ooblayout_free, }; /* Find the (I)NFTL Media Header, and optionally also the mirror media header. @@ -1537,6 +1567,7 @@ static int __init doc_probe(unsigned long physadr) nand->bbt_md = nand->bbt_td + 1; mtd->owner = THIS_MODULE; + mtd_set_ooblayout(mtd, &doc200x_ooblayout_ops); nand_set_controller_data(nand, doc); nand->select_chip = doc200x_select_chip; @@ -1548,7 +1579,6 @@ static int __init doc_probe(unsigned long physadr) nand->ecc.calculate = doc200x_calculate_ecc; nand->ecc.correct = doc200x_correct_data; - nand->ecc.layout = &doc200x_oobinfo; nand->ecc.mode = NAND_ECC_HW_SYNDROME; nand->ecc.size = 512; nand->ecc.bytes = 6; |