mtd: nand: diskonchip: switch to mtd_ooblayout_ops

Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index 547c100..a023ab9 100644 (file)
--- 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;