[RFC PATCH v5 4/6] mtd: rawnand: meson: use macro for OOB area

[Arseniy Krasnov]

This replaces constants and same patterns for OOB handling with special
macroses.

Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
---
 drivers/mtd/nand/raw/meson_nand.c | 33 ++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index e42c28be02f3..23a73268421b 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -108,6 +108,9 @@
 
 #define PER_INFO_BYTE		8
 
+#define NFC_USER_BYTES		2
+#define NFC_OOB_PER_ECC(nand)	((nand)->ecc.bytes + NFC_USER_BYTES)
+
 struct meson_nfc_nand_chip {
 	struct list_head node;
 	struct nand_chip nand;
@@ -339,7 +342,7 @@ static u8 *meson_nfc_oob_ptr(struct nand_chip *nand, int i)
 	struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand);
 	int len;
 
-	len = nand->ecc.size * (i + 1) + (nand->ecc.bytes + 2) * i;
+	len = nand->ecc.size * (i + 1) + NFC_OOB_PER_ECC(nand) * i;
 
 	return meson_chip->data_buf + len;
 }
@@ -350,7 +353,7 @@ static u8 *meson_nfc_data_ptr(struct nand_chip *nand, int i)
 	int len, temp;
 
 	temp = nand->ecc.size + nand->ecc.bytes;
-	len = (temp + 2) * i;
+	len = (temp + NFC_USER_BYTES) * i;
 
 	return meson_chip->data_buf + len;
 }
@@ -364,7 +367,7 @@ static void meson_nfc_get_data_oob(struct nand_chip *nand,
 	u8 *dsrc, *osrc;
 	u8 *oobtail;
 
-	oob_len = nand->ecc.bytes + 2;
+	oob_len = NFC_OOB_PER_ECC(nand);
 	for (i = 0; i < nand->ecc.steps; i++) {
 		if (buf) {
 			dsrc = meson_nfc_data_ptr(nand, i);
@@ -393,7 +396,7 @@ static void meson_nfc_set_data_oob(struct nand_chip *nand,
 	u8 *dsrc, *osrc;
 	u8 *oobtail;
 
-	oob_len = nand->ecc.bytes + 2;
+	oob_len = NFC_OOB_PER_ECC(nand);
 	for (i = 0; i < nand->ecc.steps; i++) {
 		if (buf) {
 			dsrc = meson_nfc_data_ptr(nand, i);
@@ -452,7 +455,7 @@ static void meson_nfc_set_user_byte(struct nand_chip *nand, u8 *oob_buf)
 	__le64 *info;
 	int i, count;
 
-	for (i = 0, count = 0; i < nand->ecc.steps; i++, count += (nand->ecc.bytes + 2)) {
+	for (i = 0, count = 0; i < nand->ecc.steps; i++, count += NFC_OOB_PER_ECC(nand)) {
 		info = &meson_chip->info_buf[i];
 		*info |= oob_buf[count];
 		*info |= oob_buf[count + 1] << 8;
@@ -465,7 +468,7 @@ static void meson_nfc_get_user_byte(struct nand_chip *nand, u8 *oob_buf)
 	__le64 *info;
 	int i, count;
 
-	for (i = 0, count = 0; i < nand->ecc.steps; i++, count += (nand->ecc.bytes + 2)) {
+	for (i = 0, count = 0; i < nand->ecc.steps; i++, count += NFC_OOB_PER_ECC(nand)) {
 		info = &meson_chip->info_buf[i];
 		oob_buf[count] = *info;
 		oob_buf[count + 1] = *info >> 8;
@@ -661,7 +664,7 @@ static u32 meson_nfc_oob_free_bytes(struct nand_chip *nand)
 {
 	struct mtd_info *mtd = nand_to_mtd(nand);
 
-	return mtd->oobsize - nand->ecc.steps * (nand->ecc.bytes + 2);
+	return mtd->oobsize - nand->ecc.steps * NFC_OOB_PER_ECC(nand);
 }
 
 static int meson_nfc_write_oob(struct nand_chip *nand, int page)
@@ -712,11 +715,11 @@ static int meson_nfc_read_oob(struct nand_chip *nand, int page)
 	/* Read ECC codes and user bytes. */
 	for (i = 0; i < nand->ecc.steps; i++) {
 		u32 ecc_offs = nand->ecc.size * (i + 1) +
-			       (nand->ecc.bytes + 2) * i;
+			       NFC_OOB_PER_ECC(nand) * i;
 
 		ret = nand_change_read_column_op(nand, ecc_offs,
-						 oob_buf + i * (nand->ecc.bytes + 2),
-						 (nand->ecc.bytes + 2), false);
+						 oob_buf + i * NFC_OOB_PER_ECC(nand),
+						 NFC_OOB_PER_ECC(nand), false);
 		if (ret)
 			return ret;
 	}
@@ -918,12 +921,14 @@ static int meson_nfc_read_page_hwecc(struct nand_chip *nand, u8 *buf,
 
 		for (i = 0; i < nand->ecc.steps ; i++) {
 			u8 *data = buf + i * ecc->size;
-			u8 *oob = nand->oob_poi + i * (ecc->bytes + 2);
+			u8 *oob = nand->oob_poi + i * NFC_OOB_PER_ECC(nand);
 
 			if (correct_bitmap & BIT_ULL(i))
 				continue;
+
 			ret = nand_check_erased_ecc_chunk(data,	ecc->size,
-							  oob, ecc->bytes + 2,
+							  oob,
+							  NFC_OOB_PER_ECC(nand),
 							  NULL, 0,
 							  ecc->strength);
 			if (ret < 0) {
@@ -1073,7 +1078,7 @@ static int meson_ooblayout_ecc(struct mtd_info *mtd, int section,
 	if (section >= nand->ecc.steps)
 		return -ERANGE;
 
-	oobregion->offset =  2 + (section * (2 + nand->ecc.bytes));
+	oobregion->offset = NFC_USER_BYTES + (section * NFC_OOB_PER_ECC(nand));
 	oobregion->length = nand->ecc.bytes;
 
 	return 0;
@@ -1091,7 +1096,7 @@ static int meson_ooblayout_free(struct mtd_info *mtd, int section,
 	/* Split rest of OOB area (not covered by ECC engine) per each
 	 * ECC section. This will be OOB data available to user.
 	 */
-	oobregion->offset = (section + nand->ecc.steps) * (2 + nand->ecc.bytes);
+	oobregion->offset = (section + nand->ecc.steps) * NFC_OOB_PER_ECC(nand);
 	oobregion->length = oob_bytes / nand->ecc.steps;
 
 	return 0;
-- 
2.35.0