linux-kernel - [PATCH v4 3/5] mtd: rawnand: Add write_oob hook in nand_chip

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Date:   Mon, 18 May 2020 15:59:41 +0200
From:   Bean Huo <huobean@...il.com>
To:     miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        s.hauer@...gutronix.de, boris.brezillon@...labora.com,
        derosier@...il.com
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        huobean@...il.com, Bean Huo <beanhuo@...ron.com>
Subject: [PATCH v4 3/5] mtd: rawnand: Add write_oob hook in nand_chip_ops

From: Bean Huo <beanhuo@...ron.com>

Break the function nand_write_oob() into two functions, and one of them
is named nand_write_oob_nand(), which will be assigned to new added hook
write_oob by default. The hook write_oob will be overwritten in the NAND
vendor lower-level driver if needed.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Signed-off-by: Bean Huo <beanhuo@...ron.com>
---
 drivers/mtd/nand/raw/internals.h | 3 ++-
 drivers/mtd/nand/raw/nand_base.c | 9 +++++++++
 include/linux/mtd/rawnand.h      | 3 +++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h
index 03866b0aadea..94d300a207ac 100644
--- a/drivers/mtd/nand/raw/internals.h
+++ b/drivers/mtd/nand/raw/internals.h
@@ -99,7 +99,8 @@ int nand_read_param_page_op(struct nand_chip *chip, u8 page, void *buf,
 void nand_decode_ext_id(struct nand_chip *chip);
 void panic_nand_wait(struct nand_chip *chip, unsigned long timeo);
 void sanitize_string(uint8_t *s, size_t len);
-
+int nand_write_oob_nand(struct nand_chip *chip, loff_t to,
+			 struct mtd_oob_ops *ops);
 static inline bool nand_has_exec_op(struct nand_chip *chip)
 {
 	if (!chip->controller || !chip->controller->ops ||
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index e90b7ae878e2..09ee490c08a9 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4267,6 +4267,13 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to,
 			  struct mtd_oob_ops *ops)
 {
 	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	return chip->ops.write_oob(chip, to, ops);
+}
+
+int nand_write_oob_nand(struct nand_chip *chip, loff_t to,
+			struct mtd_oob_ops *ops)
+{
 	int ret;
 
 	ops->retlen = 0;
@@ -4573,6 +4580,8 @@ static void nand_set_defaults(struct nand_chip *chip)
 
 	if (!chip->buf_align)
 		chip->buf_align = 1;
+
+	chip->ops.write_oob = nand_write_oob_nand;
 }
 
 /* Sanitize ONFI strings so we can safely print them */
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index df3d4b3ef2f6..3d75e50e5b75 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1035,6 +1035,7 @@ struct nand_legacy {
  *			setting the read-retry mode. Mostly needed for MLC NAND.
  * @pre_erase:		[FLASHSPECIFIC] prepare a physical erase block
  * @post_erase:		[FLASHSPECIFIC] physical block erase post
+ * @write_oob:		[REPLACEABLE] Raw NAND write operation
  */
 struct nand_chip_ops {
 	int (*suspend)(struct nand_chip *chip);
@@ -1044,6 +1045,8 @@ struct nand_chip_ops {
 	int (*setup_read_retry)(struct nand_chip *chip, int retry_mode);
 	int (*pre_erase)(struct nand_chip *chip, u32 eraseblock);
 	int (*post_erase)(struct nand_chip *chip, u32 eraseblock);
+	int (*write_oob)(struct nand_chip *chip, loff_t to,
+			 struct mtd_oob_ops *ops);
 };
 
 /**
-- 
2.17.1