mtd: rawnand: Use the ECC framework OOB layouts

No need to have our own in the raw NAND core.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-18-miquel.raynal@bootlin.com

1 files changed, 9 insertions, 165 deletions

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 2c102aeecdc1..4b41de520d0d 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -46,166 +46,6 @@
 
 #include "internals.h"
 
-/* Define default oob placement schemes for large and small page devices */
-static int nand_ooblayout_ecc_sp(struct mtd_info *mtd, int section,
-				 struct mtd_oob_region *oobregion)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-
-	if (section > 1)
-		return -ERANGE;
-
-	if (!section) {
-		oobregion->offset = 0;
-		if (mtd->oobsize == 16)
-			oobregion->length = 4;
-		else
-			oobregion->length = 3;
-	} else {
-		if (mtd->oobsize == 8)
-			return -ERANGE;
-
-		oobregion->offset = 6;
-		oobregion->length = ecc->total - 4;
-	}
-
-	return 0;
-}
-
-static int nand_ooblayout_free_sp(struct mtd_info *mtd, int section,
-				  struct mtd_oob_region *oobregion)
-{
-	if (section > 1)
-		return -ERANGE;
-
-	if (mtd->oobsize == 16) {
-		if (section)
-			return -ERANGE;
-
-		oobregion->length = 8;
-		oobregion->offset = 8;
-	} else {
-		oobregion->length = 2;
-		if (!section)
-			oobregion->offset = 3;
-		else
-			oobregion->offset = 6;
-	}
-
-	return 0;
-}
-
-const struct mtd_ooblayout_ops nand_ooblayout_sp_ops = {
-	.ecc = nand_ooblayout_ecc_sp,
-	.free = nand_ooblayout_free_sp,
-};
-EXPORT_SYMBOL_GPL(nand_ooblayout_sp_ops);
-
-static int nand_ooblayout_ecc_lp(struct mtd_info *mtd, int section,
-				 struct mtd_oob_region *oobregion)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-
-	if (section || !ecc->total)
-		return -ERANGE;
-
-	oobregion->length = ecc->total;
-	oobregion->offset = mtd->oobsize - oobregion->length;
-
-	return 0;
-}
-
-static int nand_ooblayout_free_lp(struct mtd_info *mtd, int section,
-				  struct mtd_oob_region *oobregion)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-
-	if (section)
-		return -ERANGE;
-
-	oobregion->length = mtd->oobsize - ecc->total - 2;
-	oobregion->offset = 2;
-
-	return 0;
-}
-
-const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
-	.ecc = nand_ooblayout_ecc_lp,
-	.free = nand_ooblayout_free_lp,
-};
-EXPORT_SYMBOL_GPL(nand_ooblayout_lp_ops);
-
-/*
- * Support the old "large page" layout used for 1-bit Hamming ECC where ECC
- * are placed at a fixed offset.
- */
-static int nand_ooblayout_ecc_lp_hamming(struct mtd_info *mtd, int section,
-					 struct mtd_oob_region *oobregion)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-
-	if (section)
-		return -ERANGE;
-
-	switch (mtd->oobsize) {
-	case 64:
-		oobregion->offset = 40;
-		break;
-	case 128:
-		oobregion->offset = 80;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	oobregion->length = ecc->total;
-	if (oobregion->offset + oobregion->length > mtd->oobsize)
-		return -ERANGE;
-
-	return 0;
-}
-
-static int nand_ooblayout_free_lp_hamming(struct mtd_info *mtd, int section,
-					  struct mtd_oob_region *oobregion)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-	int ecc_offset = 0;
-
-	if (section < 0 || section > 1)
-		return -ERANGE;
-
-	switch (mtd->oobsize) {
-	case 64:
-		ecc_offset = 40;
-		break;
-	case 128:
-		ecc_offset = 80;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if (section == 0) {
-		oobregion->offset = 2;
-		oobregion->length = ecc_offset - 2;
-	} else {
-		oobregion->offset = ecc_offset + ecc->total;
-		oobregion->length = mtd->oobsize - oobregion->offset;
-	}
-
-	return 0;
-}
-
-static const struct mtd_ooblayout_ops nand_ooblayout_lp_hamming_ops = {
-	.ecc = nand_ooblayout_ecc_lp_hamming,
-	.free = nand_ooblayout_free_lp_hamming,
-};
-
 static int nand_pairing_dist3_get_info(struct mtd_info *mtd, int page,
 				       struct mtd_pairing_info *info)
 {
@@ -5372,7 +5212,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 				return -EINVAL;
 			}
 
-			mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+			mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 
 		}
 
@@ -5381,7 +5221,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 		 * used, otherwise we don't know how many bytes can really be
 		 * used.
 		 */
-		if (mtd->ooblayout == &nand_ooblayout_lp_ops &&
+		if (mtd->ooblayout == nand_get_large_page_ooblayout() &&
 		    ecc->options & NAND_ECC_MAXIMIZE) {
 			int steps, bytes;
 
@@ -5783,11 +5623,12 @@ static int nand_scan_tail(struct nand_chip *chip)
 		switch (mtd->oobsize) {
 		case 8:
 		case 16:
-			mtd_set_ooblayout(mtd, &nand_ooblayout_sp_ops);
+			mtd_set_ooblayout(mtd, nand_get_small_page_ooblayout());
 			break;
 		case 64:
 		case 128:
-			mtd_set_ooblayout(mtd, &nand_ooblayout_lp_hamming_ops);
+			mtd_set_ooblayout(mtd,
+					  nand_get_large_page_hamming_ooblayout());
 			break;
 		default:
 			/*
@@ -5799,7 +5640,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			 */
 			if (ecc->engine_type == NAND_ECC_ENGINE_TYPE_NONE) {
 				mtd_set_ooblayout(mtd,
-						&nand_ooblayout_lp_ops);
+						  nand_get_large_page_ooblayout());
 				break;
 			}
 
@@ -5954,7 +5795,10 @@ static int nand_scan_tail(struct nand_chip *chip)
 		ret = -EINVAL;
 		goto err_nand_manuf_cleanup;
 	}
+
 	ecc->total = ecc->steps * ecc->bytes;
+	chip->base.ecc.ctx.total = ecc->total;
+
 	if (ecc->total > mtd->oobsize) {
 		WARN(1, "Total number of ECC bytes exceeded oobsize\n");
 		ret = -EINVAL;