[PATCH v2 4/4] mtd: rawnand: mtk: Add new nfc capability maximize_fdm_ecc

[Xiaolei Li]

For some MTK NAND chips, BootROM will access more than one byte
ECC protected FDM data, but now we fix ECC protected FDM byte as 1.
This will make some chips be failed to boot up.

This patch adds one new nfc capability maximize_fdm_ecc to maximize ECC
protected FDM bytes if it is true.

Signed-off-by: Xiaolei Li <xiaolei.li at mediatek.com>
---
 drivers/mtd/nand/raw/mtk_nand.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
 mode change 100644 => 100755 drivers/mtd/nand/raw/mtk_nand.c

diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
old mode 100644
new mode 100755
index 03a4df2..7025132
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -111,6 +111,7 @@ struct mtk_nfc_caps {
 	u8 pageformat_spare_shift;
 	u8 nfi_clk_div;
 	u8 max_sector;
+	bool maximize_fdm_ecc;
 };
 
 struct mtk_nfc_bad_mark_ctl {
@@ -1151,8 +1152,8 @@ static void mtk_nfc_set_fdm(struct mtk_nfc_fdm *fdm, struct mtd_info *mtd)
 	if (fdm->reg_size > NFI_FDM_MAX_SIZE)
 		fdm->reg_size = NFI_FDM_MAX_SIZE;
 
-	/* bad block mark storage */
-	fdm->ecc_size = 1;
+	/* Reserve at least one byte for bad mark */
+	fdm->ecc_size = nfc->caps->maximize_fdm_ecc ? fdm->reg_size : 1;
 }
 
 static void mtk_nfc_set_bad_mark_ctl(struct mtk_nfc_bad_mark_ctl *bm_ctl,
@@ -1413,6 +1414,7 @@ static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc)
 	.pageformat_spare_shift = 4,
 	.nfi_clk_div = 1,
 	.max_sector = 16,
+	.maximize_fdm_ecc = false,
 };
 
 static const struct mtk_nfc_caps mtk_nfc_caps_mt2712 = {
@@ -1423,6 +1425,7 @@ static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc)
 	.pageformat_spare_shift = 16,
 	.nfi_clk_div = 2,
 	.max_sector = 16,
+	.maximize_fdm_ecc = false,
 };
 
 static const struct mtk_nfc_caps mtk_nfc_caps_mt7622 = {
@@ -1433,6 +1436,7 @@ static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc)
 	.pageformat_spare_shift = 4,
 	.nfi_clk_div = 1,
 	.max_sector = 8,
+	.maximize_fdm_ecc = false,
 };
 
 static const struct of_device_id mtk_nfc_id_table[] = {
-- 
1.9.1