[MTD] NAND remove write_byte/word function from nand_chip

The previous change of the command / hardware control allows to
remove the write_byte/word functions completely, as their only
user were nand_command and nand_command_lp.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

7 files changed, 14 insertions, 93 deletions

diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c
index c0e96860686..d7897dc6b3c 100644
--- a/drivers/mtd/nand/ams-delta.c
+++ b/drivers/mtd/nand/ams-delta.c
@@ -179,7 +179,6 @@ static int __init ams_delta_init(void)
 	this->IO_ADDR_R = (OMAP_MPUIO_BASE + OMAP_MPUIO_INPUT_LATCH);
 	this->IO_ADDR_W = (OMAP_MPUIO_BASE + OMAP_MPUIO_OUTPUT);
 	this->read_byte = ams_delta_read_byte;
-	this->write_byte = ams_delta_write_byte;
 	this->write_buf = ams_delta_write_buf;
 	this->read_buf = ams_delta_read_buf;
 	this->verify_buf = ams_delta_verify_buf;
diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
index 275453ea7a7..31228334da1 100644
--- a/drivers/mtd/nand/au1550nd.c
+++ b/drivers/mtd/nand/au1550nd.c
@@ -40,6 +40,7 @@
 static struct mtd_info *au1550_mtd = NULL;
 static void __iomem *p_nand;
 static int nand_width = 1;	/* default x8 */
+static void (*au1550_write_byte)(struct mtd_info *, u_char);
 
 /*
  * Define partitions for flash device
@@ -129,21 +130,6 @@ static u16 au_read_word(struct mtd_info *mtd)
 }
 
 /**
- * au_write_word -  write one word to the chip
- * @mtd:	MTD device structure
- * @word:	data word to write
- *
- *  write function for 16bit buswith without
- * endianess conversion
- */
-static void au_write_word(struct mtd_info *mtd, u16 word)
-{
-	struct nand_chip *this = mtd->priv;
-	writew(word, this->IO_ADDR_W);
-	au_sync();
-}
-
-/**
  * au_write_buf -  write buffer to chip
  * @mtd:	MTD device structure
  * @buf:	data buffer
@@ -379,9 +365,9 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
 			column -= 256;
 			readcmd = NAND_CMD_READ1;
 		}
-		this->write_byte(mtd, readcmd);
+		au1550_write_byte(mtd, readcmd);
 	}
-	this->write_byte(mtd, command);
+	au1550_write_byte(mtd, command);
 
 	/* Set ALE and clear CLE to start address cycle */
 	au1550_hwcontrol(mtd, NAND_CTL_CLRCLE);
@@ -394,10 +380,10 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
 			/* Adjust columns for 16 bit buswidth */
 			if (this->options & NAND_BUSWIDTH_16)
 				column >>= 1;
-			this->write_byte(mtd, column);
+			au1550_write_byte(mtd, column);
 		}
 		if (page_addr != -1) {
-			this->write_byte(mtd, (u8)(page_addr & 0xff));
+			au1550_write_byte(mtd, (u8)(page_addr & 0xff));
 
 			if (command == NAND_CMD_READ0 ||
 			    command == NAND_CMD_READ1 ||
@@ -415,11 +401,11 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
 				au1550_hwcontrol(mtd, NAND_CTL_SETNCE);
 			}
 
-			this->write_byte(mtd, (u8)(page_addr >> 8));
+			au1550_write_byte(mtd, (u8)(page_addr >> 8));
 
 			/* One more address cycle for devices > 32MiB */
 			if (this->chipsize > (32 << 20))
-				this->write_byte(mtd, (u8)((page_addr >> 16) & 0x0f));
+				au1550_write_byte(mtd, (u8)((page_addr >> 16) & 0x0f));
 		}
 		/* Latch in address */
 		au1550_hwcontrol(mtd, NAND_CTL_CLRALE);
@@ -597,8 +583,7 @@ static int __init au1xxx_nand_init(void)
 		this->options |= NAND_BUSWIDTH_16;
 
 	this->read_byte = (!nand_width) ? au_read_byte16 : au_read_byte;
-	this->write_byte = (!nand_width) ? au_write_byte16 : au_write_byte;
-	this->write_word = au_write_word;
+	au1550_write_byte = (!nand_width) ? au_write_byte16 : au_write_byte;
 	this->read_word = au_read_word;
 	this->write_buf = (!nand_width) ? au_write_buf16 : au_write_buf;
 	this->read_buf = (!nand_width) ? au_read_buf16 : au_read_buf;
diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c
index cd3d7eb132f..1e0348ae325 100644
--- a/drivers/mtd/nand/cs553x_nand.c
+++ b/drivers/mtd/nand/cs553x_nand.c
@@ -220,7 +220,6 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 	this->cmd_ctrl = cs553x_hwcontrol;
 	this->dev_ready = cs553x_device_ready;
 	this->read_byte = cs553x_read_byte;
-	this->write_byte = cs553x_write_byte;
 	this->read_buf = cs553x_read_buf;
 	this->write_buf = cs553x_write_buf;
 
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index e4bb6b429f8..2ec9080e2b1 100644
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -717,8 +717,12 @@ static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd,
 		/* 11.4.3 -- 4 NOPs after CSDNControl write */
 		DoC_Delay(doc, 4);
 	}
-	if (cmd != NAND_CMD_NONE)
-		this->write_byte(mtd, cmd);
+	if (cmd != NAND_CMD_NONE) {
+		if (DoC_is_2000(doc))
+			doc2000_write_byte(mtd, cmd);
+		else
+			doc2001_write_byte(mtd, cmd);
+	}
 }
 
 static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr)
@@ -1435,7 +1439,6 @@ static inline int __init doc2000_init(struct mtd_info *mtd)
 	struct nand_chip *this = mtd->priv;
 	struct doc_priv *doc = this->priv;
 
-	this->write_byte = doc2000_write_byte;
 	this->read_byte = doc2000_read_byte;
 	this->write_buf = doc2000_writebuf;
 	this->read_buf = doc2000_readbuf;
@@ -1453,7 +1456,6 @@ static inline int __init doc2001_init(struct mtd_info *mtd)
 	struct nand_chip *this = mtd->priv;
 	struct doc_priv *doc = this->priv;
 
-	this->write_byte = doc2001_write_byte;
 	this->read_byte = doc2001_read_byte;
 	this->write_buf = doc2001_writebuf;
 	this->read_buf = doc2001_readbuf;
@@ -1485,7 +1487,6 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd)
 	struct nand_chip *this = mtd->priv;
 	struct doc_priv *doc = this->priv;
 
-	this->write_byte = NULL;
 	this->read_byte = doc2001plus_read_byte;
 	this->write_buf = doc2001plus_writebuf;
 	this->read_buf = doc2001plus_readbuf;
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index f6997fb77b9..4f387c8388d 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -198,19 +198,6 @@ static uint8_t nand_read_byte(struct mtd_info *mtd)
 }
 
 /**
- * nand_write_byte - [DEFAULT] write one byte to the chip
- * @mtd:	MTD device structure
- * @byte:	pointer to data byte to write
- *
- * Default write function for 8it buswith
- */
-static void nand_write_byte(struct mtd_info *mtd, uint8_t byte)
-{
-	struct nand_chip *this = mtd->priv;
-	writeb(byte, this->IO_ADDR_W);
-}
-
-/**
  * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip
  * @mtd:	MTD device structure
  *
@@ -224,20 +211,6 @@ static uint8_t nand_read_byte16(struct mtd_info *mtd)
 }
 
 /**
- * nand_write_byte16 - [DEFAULT] write one byte endianess aware to the chip
- * @mtd:	MTD device structure
- * @byte:	pointer to data byte to write
- *
- * Default write function for 16bit buswith with
- * endianess conversion
- */
-static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte)
-{
-	struct nand_chip *this = mtd->priv;
-	writew(le16_to_cpu((u16) byte), this->IO_ADDR_W);
-}
-
-/**
  * nand_read_word - [DEFAULT] read one word from the chip
  * @mtd:	MTD device structure
  *
@@ -251,20 +224,6 @@ static u16 nand_read_word(struct mtd_info *mtd)
 }
 
 /**
- * nand_write_word - [DEFAULT] write one word to the chip
- * @mtd:	MTD device structure
- * @word:	data word to write
- *
- * Default write function for 16bit buswith without
- * endianess conversion
- */
-static void nand_write_word(struct mtd_info *mtd, u16 word)
-{
-	struct nand_chip *this = mtd->priv;
-	writew(word, this->IO_ADDR_W);
-}
-
-/**
  * nand_select_chip - [DEFAULT] control CE line
  * @mtd:	MTD device structure
  * @chip:	chipnumber to select, -1 for deselect
@@ -2200,12 +2159,8 @@ static void nand_set_defaults(struct nand_chip *this, int busw)
 
 	if (!this->select_chip)
 		this->select_chip = nand_select_chip;
-	if (!this->write_byte)
-		this->write_byte = busw ? nand_write_byte16 : nand_write_byte;
 	if (!this->read_byte)
 		this->read_byte = busw ? nand_read_byte16 : nand_read_byte;
-	if (!this->write_word)
-		this->write_word = nand_write_word;
 	if (!this->read_word)
 		this->read_word = nand_read_word;
 	if (!this->block_bad)
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index ecf727b32de..ebd64abc8be 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -1327,17 +1327,6 @@ ns_nand_read_word(struct mtd_info *mtd)
 }
 
 static void
-ns_nand_write_word(struct mtd_info *mtd, uint16_t word)
-{
-	struct nand_chip *chip = (struct nand_chip *)mtd->priv;
-
-	NS_DBG("write_word\n");
-
-	chip->write_byte(mtd, word & 0xFF);
-	chip->write_byte(mtd, word >> 8);
-}
-
-static void
 ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
 {
         struct nandsim *ns = (struct nandsim *)((struct nand_chip *)mtd->priv)->priv;
@@ -1467,11 +1456,9 @@ static int __init ns_init_module(void)
 	chip->cmd_ctrl	 = ns_hwcontrol;
 	chip->read_byte  = ns_nand_read_byte;
 	chip->dev_ready  = ns_device_ready;
-	chip->write_byte = ns_nand_write_byte;
 	chip->write_buf  = ns_nand_write_buf;
 	chip->read_buf   = ns_nand_read_buf;
 	chip->verify_buf = ns_nand_verify_buf;
-	chip->write_word = ns_nand_write_word;
 	chip->read_word  = ns_nand_read_word;
 	chip->ecc.mode   = NAND_ECC_SOFT;
 	chip->options   |= NAND_SKIP_BBTSCAN;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index e9a93526315..2c0fb638046 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -253,9 +253,7 @@ struct nand_ecc_ctrl {
  * @IO_ADDR_R:		[BOARDSPECIFIC] address to read the 8 I/O lines of the flash device
  * @IO_ADDR_W:		[BOARDSPECIFIC] address to write the 8 I/O lines of the flash device
  * @read_byte:		[REPLACEABLE] read one byte from the chip
- * @write_byte:		[REPLACEABLE] write one byte to the chip
  * @read_word:		[REPLACEABLE] read one word from the chip
- * @write_word:		[REPLACEABLE] write one word to the chip
  * @write_buf:		[REPLACEABLE] write data from the buffer to the chip
  * @read_buf:		[REPLACEABLE] read data from the chip into the buffer
  * @verify_buf:		[REPLACEABLE] verify buffer contents against the chip data
@@ -307,10 +305,7 @@ struct nand_chip {
 	void  __iomem	*IO_ADDR_W;
 
 	uint8_t		(*read_byte)(struct mtd_info *mtd);
-	void		(*write_byte)(struct mtd_info *mtd, uint8_t byte);
 	u16		(*read_word)(struct mtd_info *mtd);
-	void		(*write_word)(struct mtd_info *mtd, u16 word);
-
 	void		(*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
 	void		(*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
 	int		(*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);