From 8c1fd89a85f898384df02217c09c98c2f39b4832 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 21 Oct 2009 10:22:01 +0200
Subject: mxc_nand: cleanup eccoob descriptions

The original Freescale driver used to have eccoob descriptions like
this:

static struct nand_ecclayout nand_hw_eccoob_8 = {
	.eccbytes = 5,
	.eccpos = {6, 7, 8, 9, 10},
	.oobfree = {{0, 5}, {11, 5}}
};

static struct nand_ecclayout nand_hw_eccoob_16 = {
	.eccbytes = 5,
	.eccpos = {6, 7, 8, 9, 10},
	.oobfree = {{0, 6}, {12, 4}}
};

The former was used for 8bit flashes and the latter for 16bit flashes.
They honored the fact that the bad block marker on 8bit flashes is on byte 5
while on 16bit flashes it is on byte 11.
In the Kernel driver this was copied wrong and we ended up with two identical
descriptions.

Change it so that we have only one description which leaves byte 5 and byte
11 unspecified so that it won't be used by others.

Also, rename the descriptions to nand_hw_eccoob_smallpage and
nand_hw_eccoob_largepage so that it can't be confused with Nand chip bus
widths (what actually happened in this driver)

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 06c531485df9..2aae5a7ddbd1 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -129,19 +129,13 @@ struct mxc_nand_host {
 #define SPARE_SINGLEBIT_ERROR 0x1
 
 /* OOB placement block for use with hardware ecc generation */
-static struct nand_ecclayout nand_hw_eccoob_8 = {
+static struct nand_ecclayout nand_hw_eccoob_smallpage = {
 	.eccbytes = 5,
 	.eccpos = {6, 7, 8, 9, 10},
-	.oobfree = {{0, 5}, {11, 5}, }
+	.oobfree = {{0, 5}, {12, 4}, }
 };
 
-static struct nand_ecclayout nand_hw_eccoob_16 = {
-	.eccbytes = 5,
-	.eccpos = {6, 7, 8, 9, 10},
-	.oobfree = {{0, 5}, {11, 5}, }
-};
-
-static struct nand_ecclayout nand_hw_eccoob_64 = {
+static struct nand_ecclayout nand_hw_eccoob_largepage = {
 	.eccbytes = 20,
 	.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
 		   38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
@@ -940,7 +934,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	} else {
 		this->ecc.size = 512;
 		this->ecc.bytes = 3;
-		this->ecc.layout = &nand_hw_eccoob_8;
+		this->ecc.layout = &nand_hw_eccoob_smallpage;
 		this->ecc.mode = NAND_ECC_SOFT;
 		tmp = readw(host->regs + NFC_CONFIG1);
 		tmp &= ~NFC_ECC_EN;
@@ -964,7 +958,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	/* NAND bus width determines access funtions used by upper layer */
 	if (pdata->width == 2) {
 		this->options |= NAND_BUSWIDTH_16;
-		this->ecc.layout = &nand_hw_eccoob_16;
+		this->ecc.layout = &nand_hw_eccoob_smallpage;
 	}
 
 	/* first scan to find the device and get the page size */
@@ -978,20 +972,20 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	if (this->ecc.mode == NAND_ECC_HW) {
 		switch (mtd->oobsize) {
 		case 8:
-			this->ecc.layout = &nand_hw_eccoob_8;
+			this->ecc.layout = &nand_hw_eccoob_smallpage;
 			break;
 		case 16:
-			this->ecc.layout = &nand_hw_eccoob_16;
+			this->ecc.layout = &nand_hw_eccoob_smallpage;
 			break;
 		case 64:
-			this->ecc.layout = &nand_hw_eccoob_64;
+			this->ecc.layout = &nand_hw_eccoob_largepage;
 			break;
 		default:
 			/* page size not handled by HW ECC */
 			/* switching back to soft ECC */
 			this->ecc.size = 512;
 			this->ecc.bytes = 3;
-			this->ecc.layout = &nand_hw_eccoob_8;
+			this->ecc.layout = &nand_hw_eccoob_smallpage;
 			this->ecc.mode = NAND_ECC_SOFT;
 			this->ecc.calculate = NULL;
 			this->ecc.correct = NULL;
-- 
cgit v1.2.3


From 13e1add1073f55d5361e5357016b631efc03bff8 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 21 Oct 2009 10:39:05 +0200
Subject: mxc_nand: cleanup initialization

The oob layout was initialized several times. Instead, use
a smallpage layout by default and switch to a largepage
afterwards if necessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 72 ++++++++++++++-------------------------------
 1 file changed, 22 insertions(+), 50 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 2aae5a7ddbd1..dafa1f0e04db 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -921,45 +921,42 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	if (err)
 		goto eirq;
 
+	/* Reset NAND */
+	this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+	/* preset operation */
+	/* Unlock the internal RAM Buffer */
+	writew(0x2, host->regs + NFC_CONFIG);
+
+	/* Blocks to be unlocked */
+	writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
+	writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
+
+	/* Unlock Block Command for given address range */
+	writew(0x4, host->regs + NFC_WRPROT);
+
+	this->ecc.size = 512;
+	this->ecc.bytes = 3;
+	this->ecc.layout = &nand_hw_eccoob_smallpage;
+
 	if (pdata->hw_ecc) {
 		this->ecc.calculate = mxc_nand_calculate_ecc;
 		this->ecc.hwctl = mxc_nand_enable_hwecc;
 		this->ecc.correct = mxc_nand_correct_data;
 		this->ecc.mode = NAND_ECC_HW;
-		this->ecc.size = 512;
-		this->ecc.bytes = 3;
 		tmp = readw(host->regs + NFC_CONFIG1);
 		tmp |= NFC_ECC_EN;
 		writew(tmp, host->regs + NFC_CONFIG1);
 	} else {
-		this->ecc.size = 512;
-		this->ecc.bytes = 3;
-		this->ecc.layout = &nand_hw_eccoob_smallpage;
 		this->ecc.mode = NAND_ECC_SOFT;
 		tmp = readw(host->regs + NFC_CONFIG1);
 		tmp &= ~NFC_ECC_EN;
 		writew(tmp, host->regs + NFC_CONFIG1);
 	}
 
-	/* Reset NAND */
-	this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
-	/* preset operation */
-	/* Unlock the internal RAM Buffer */
-	writew(0x2, host->regs + NFC_CONFIG);
-
-	/* Blocks to be unlocked */
-	writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
-	writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
-
-	/* Unlock Block Command for given address range */
-	writew(0x4, host->regs + NFC_WRPROT);
-
 	/* NAND bus width determines access funtions used by upper layer */
-	if (pdata->width == 2) {
+	if (pdata->width == 2)
 		this->options |= NAND_BUSWIDTH_16;
-		this->ecc.layout = &nand_hw_eccoob_smallpage;
-	}
 
 	/* first scan to find the device and get the page size */
 	if (nand_scan_ident(mtd, 1)) {
@@ -967,34 +964,9 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto escan;
 	}
 
-	host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
-
-	if (this->ecc.mode == NAND_ECC_HW) {
-		switch (mtd->oobsize) {
-		case 8:
-			this->ecc.layout = &nand_hw_eccoob_smallpage;
-			break;
-		case 16:
-			this->ecc.layout = &nand_hw_eccoob_smallpage;
-			break;
-		case 64:
-			this->ecc.layout = &nand_hw_eccoob_largepage;
-			break;
-		default:
-			/* page size not handled by HW ECC */
-			/* switching back to soft ECC */
-			this->ecc.size = 512;
-			this->ecc.bytes = 3;
-			this->ecc.layout = &nand_hw_eccoob_smallpage;
-			this->ecc.mode = NAND_ECC_SOFT;
-			this->ecc.calculate = NULL;
-			this->ecc.correct = NULL;
-			this->ecc.hwctl = NULL;
-			tmp = readw(host->regs + NFC_CONFIG1);
-			tmp &= ~NFC_ECC_EN;
-			writew(tmp, host->regs + NFC_CONFIG1);
-			break;
-		}
+	if (mtd->writesize == 2048) {
+		host->pagesize_2k = 1;
+		this->ecc.layout = &nand_hw_eccoob_largepage;
 	}
 
 	/* second phase scan */
-- 
cgit v1.2.3


From 06ecb04ac5c038248d2bcee92a2a4259f2acfa31 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Tue, 2 Jun 2009 11:37:53 +0200
Subject: mxc_nand: merge send_read_page and send_prog_page

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 54 +++++++++++----------------------------------
 1 file changed, 13 insertions(+), 41 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index dafa1f0e04db..8aa8a429e6b8 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -226,12 +226,10 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 	wait_op_done(host, TROP_US_DELAY, addr, islast);
 }
 
-/* This function requests the NANDFC to initate the transfer
- * of data currently in the NANDFC RAM buffer to the NAND device. */
-static void send_prog_page(struct mxc_nand_host *host, uint8_t buf_id,
-			int spare_only)
+static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
+			int spare_only, unsigned int ops)
 {
-	DEBUG(MTD_DEBUG_LEVEL3, "send_prog_page (%d)\n", spare_only);
+	DEBUG(MTD_DEBUG_LEVEL3, "send_page (%d)\n", spare_only);
 
 	/* NANDFC buffer 0 is used for page read/write */
 	writew(buf_id, host->regs + NFC_BUF_ADDR);
@@ -246,33 +244,7 @@ static void send_prog_page(struct mxc_nand_host *host, uint8_t buf_id,
 		writew(config1, host->regs + NFC_CONFIG1);
 	}
 
-	writew(NFC_INPUT, host->regs + NFC_CONFIG2);
-
-	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, spare_only, true);
-}
-
-/* Requests NANDFC to initated the transfer of data from the
- * NAND device into in the NANDFC ram buffer. */
-static void send_read_page(struct mxc_nand_host *host, uint8_t buf_id,
-		int spare_only)
-{
-	DEBUG(MTD_DEBUG_LEVEL3, "send_read_page (%d)\n", spare_only);
-
-	/* NANDFC buffer 0 is used for page read/write */
-	writew(buf_id, host->regs + NFC_BUF_ADDR);
-
-	/* Configure spare or page+spare access */
-	if (!host->pagesize_2k) {
-		uint32_t config1 = readw(host->regs + NFC_CONFIG1);
-		if (spare_only)
-			config1 |= NFC_SP_EN;
-		else
-			config1 &= ~NFC_SP_EN;
-		writew(config1, host->regs + NFC_CONFIG1);
-	}
-
-	writew(NFC_OUTPUT, host->regs + NFC_CONFIG2);
+	writew(ops, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
 	wait_op_done(host, TROP_US_DELAY, spare_only, true);
@@ -756,13 +728,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		break;
 
 	case NAND_CMD_PAGEPROG:
-		send_prog_page(host, 0, host->spare_only);
+		send_page(host, 0, host->spare_only, NFC_INPUT);
 
 		if (host->pagesize_2k) {
 			/* data in 4 areas datas */
-			send_prog_page(host, 1, host->spare_only);
-			send_prog_page(host, 2, host->spare_only);
-			send_prog_page(host, 3, host->spare_only);
+			send_page(host, 1, host->spare_only, NFC_INPUT);
+			send_page(host, 2, host->spare_only, NFC_INPUT);
+			send_page(host, 3, host->spare_only, NFC_INPUT);
 		}
 
 		break;
@@ -827,12 +799,12 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			/* send read confirm command */
 			send_cmd(host, NAND_CMD_READSTART, true);
 			/* read for each AREA */
-			send_read_page(host, 0, host->spare_only);
-			send_read_page(host, 1, host->spare_only);
-			send_read_page(host, 2, host->spare_only);
-			send_read_page(host, 3, host->spare_only);
+			send_page(host, 0, host->spare_only, NFC_OUTPUT);
+			send_page(host, 1, host->spare_only, NFC_OUTPUT);
+			send_page(host, 2, host->spare_only, NFC_OUTPUT);
+			send_page(host, 3, host->spare_only, NFC_OUTPUT);
 		} else
-			send_read_page(host, 0, host->spare_only);
+			send_page(host, 0, host->spare_only, NFC_OUTPUT);
 		break;
 
 	case NAND_CMD_READID:
-- 
cgit v1.2.3


From a3e65b64d5067f86b929eabde82f132b81437da8 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Tue, 2 Jun 2009 11:47:59 +0200
Subject: mxc_nand: introduce mxc_do_addr_cycle

This factors the address cycle to a seperate function. This
becomes useful in a later patch where we can simplify the
command processing by making use of this function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 87 ++++++++++++++++++++++++---------------------
 1 file changed, 47 insertions(+), 40 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 8aa8a429e6b8..325645c60488 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -658,6 +658,52 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
 	}
 }
 
+static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
+{
+	struct nand_chip *nand_chip = mtd->priv;
+	struct mxc_nand_host *host = nand_chip->priv;
+
+	/* Write out column address, if necessary */
+	if (column != -1) {
+		/*
+		 * MXC NANDFC can only perform full page+spare or
+		 * spare-only read/write.  When the upper layers
+		 * layers perform a read/write buf operation,
+		 * we will used the saved column adress to index into
+		 * the full page.
+		 */
+		send_addr(host, 0, page_addr == -1);
+		if (host->pagesize_2k)
+			/* another col addr cycle for 2k page */
+			send_addr(host, 0, false);
+	}
+
+	/* Write out page address, if necessary */
+	if (page_addr != -1) {
+		/* paddr_0 - p_addr_7 */
+		send_addr(host, (page_addr & 0xff), false);
+
+		if (host->pagesize_2k) {
+			if (mtd->size >= 0x10000000) {
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, false);
+				send_addr(host, (page_addr >> 16) & 0xff, true);
+			} else
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, true);
+		} else {
+			/* One more address cycle for higher density devices */
+			if (mtd->size >= 0x4000000) {
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, false);
+				send_addr(host, (page_addr >> 16) & 0xff, true);
+			} else
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, true);
+		}
+	}
+}
+
 /* Used by the upper layer to write command to NAND Flash for
  * different operations to be carried out on NAND Flash */
 static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
@@ -746,46 +792,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 
 	/* Write out the command to the device. */
 	send_cmd(host, command, useirq);
-
-	/* Write out column address, if necessary */
-	if (column != -1) {
-		/*
-		 * MXC NANDFC can only perform full page+spare or
-		 * spare-only read/write.  When the upper layers
-		 * layers perform a read/write buf operation,
-		 * we will used the saved column adress to index into
-		 * the full page.
-		 */
-		send_addr(host, 0, page_addr == -1);
-		if (host->pagesize_2k)
-			/* another col addr cycle for 2k page */
-			send_addr(host, 0, false);
-	}
-
-	/* Write out page address, if necessary */
-	if (page_addr != -1) {
-		/* paddr_0 - p_addr_7 */
-		send_addr(host, (page_addr & 0xff), false);
-
-		if (host->pagesize_2k) {
-			if (mtd->size >= 0x10000000) {
-				/* paddr_8 - paddr_15 */
-				send_addr(host, (page_addr >> 8) & 0xff, false);
-				send_addr(host, (page_addr >> 16) & 0xff, true);
-			} else
-				/* paddr_8 - paddr_15 */
-				send_addr(host, (page_addr >> 8) & 0xff, true);
-		} else {
-			/* One more address cycle for higher density devices */
-			if (mtd->size >= 0x4000000) {
-				/* paddr_8 - paddr_15 */
-				send_addr(host, (page_addr >> 8) & 0xff, false);
-				send_addr(host, (page_addr >> 16) & 0xff, true);
-			} else
-				/* paddr_8 - paddr_15 */
-				send_addr(host, (page_addr >> 8) & 0xff, true);
-		}
-	}
+	mxc_do_addr_cycle(mtd, column, page_addr);
 
 	/* Command post-processing step */
 	switch (command) {
-- 
cgit v1.2.3


From 624654917476c63287429e005173aa8629c92eac Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 15:57:20 +0200
Subject: mxc nand: remove debug param

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 325645c60488..f981a1f054d6 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -165,7 +165,7 @@ static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
  * complete by checking the INT bit of config2 register.
  */
 static void wait_op_done(struct mxc_nand_host *host, int max_retries,
-				uint16_t param, int useirq)
+				int useirq)
 {
 	uint32_t tmp;
 
@@ -194,8 +194,8 @@ static void wait_op_done(struct mxc_nand_host *host, int max_retries,
 			udelay(1);
 		}
 		if (max_retries < 0)
-			DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
-			      __func__, param);
+			DEBUG(MTD_DEBUG_LEVEL0, "%s: INT not set\n",
+			      __func__);
 	}
 }
 
@@ -209,7 +209,7 @@ static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
 	writew(NFC_CMD, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, cmd, useirq);
+	wait_op_done(host, TROP_US_DELAY, useirq);
 }
 
 /* This function sends an address (or partial address) to the
@@ -223,7 +223,7 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 	writew(NFC_ADDR, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, addr, islast);
+	wait_op_done(host, TROP_US_DELAY, islast);
 }
 
 static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
@@ -247,7 +247,7 @@ static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
 	writew(ops, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, spare_only, true);
+	wait_op_done(host, TROP_US_DELAY, true);
 }
 
 /* Request the NANDFC to perform a read of the NAND device ID. */
@@ -267,7 +267,7 @@ static void send_read_id(struct mxc_nand_host *host)
 	writew(NFC_ID, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, 0, true);
+	wait_op_done(host, TROP_US_DELAY, true);
 
 	if (this->options & NAND_BUSWIDTH_16) {
 		void __iomem *main_buf = host->regs + MAIN_AREA0;
@@ -303,7 +303,7 @@ static uint16_t get_dev_status(struct mxc_nand_host *host)
 	writew(NFC_STATUS, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, 0, true);
+	wait_op_done(host, TROP_US_DELAY, true);
 
 	/* Status is placed in first word of main buffer */
 	/* get status, then recovery area 1 data */
-- 
cgit v1.2.3


From a4ad57f8b320c9d89b7693be82e47347425db918 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 16:12:40 +0200
Subject: mxc nand: remove dead code

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index f981a1f054d6..1ffb854f989e 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -620,23 +620,6 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
 
-#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
-	if (chip > 0) {
-		DEBUG(MTD_DEBUG_LEVEL0,
-		      "ERROR:  Illegal chip select (chip = %d)\n", chip);
-		return;
-	}
-
-	if (chip == -1) {
-		writew(readw(host->regs + NFC_CONFIG1) & ~NFC_CE,
-				host->regs + NFC_CONFIG1);
-		return;
-	}
-
-	writew(readw(host->regs + NFC_CONFIG1) | NFC_CE,
-			host->regs + NFC_CONFIG1);
-#endif
-
 	switch (chip) {
 	case -1:
 		/* Disable the NFC clock */
-- 
cgit v1.2.3


From d970a0730ba5598b711d42bac287a17db5b6268a Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 16:16:01 +0200
Subject: mxc nand: use resource_size()

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 1ffb854f989e..8fcb33da8efc 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -865,7 +865,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto eres;
 	}
 
-	host->regs = ioremap(res->start, res->end - res->start + 1);
+	host->regs = ioremap(res->start, resource_size(res));
 	if (!host->regs) {
 		err = -ENOMEM;
 		goto eres;
-- 
cgit v1.2.3


From f8f9608d9b7a5b3349605284a4f3876e898413f1 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 17:12:26 +0200
Subject: mxc nand: use buffers

The NAND controller has some limitations how to access the
internal buffers. It only allows 32 bit accesses. The driver
used to work around this by having special alignment aware
copy routines.
We now copy the whole page to a buffer in memory and let the
access functions use this buffer. This simplifies the driver.
A bonnie++ test showed that this has no negative performance
impact on the driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 310 +++++++++++---------------------------------
 1 file changed, 77 insertions(+), 233 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 8fcb33da8efc..03d20086170b 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -107,15 +107,17 @@ struct mxc_nand_host {
 	struct device		*dev;
 
 	void __iomem		*regs;
-	int			spare_only;
 	int			status_request;
 	int			pagesize_2k;
-	uint16_t		col_addr;
 	struct clk		*clk;
 	int			clk_act;
 	int			irq;
 
 	wait_queue_head_t	irq_waitq;
+
+	uint8_t			*data_buf;
+	unsigned int		buf_start;
+	int			spare_len;
 };
 
 /* Define delays in microsec for NAND device operations */
@@ -227,23 +229,11 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 }
 
 static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
-			int spare_only, unsigned int ops)
+		unsigned int ops)
 {
-	DEBUG(MTD_DEBUG_LEVEL3, "send_page (%d)\n", spare_only);
-
 	/* NANDFC buffer 0 is used for page read/write */
 	writew(buf_id, host->regs + NFC_BUF_ADDR);
 
-	/* Configure spare or page+spare access */
-	if (!host->pagesize_2k) {
-		uint16_t config1 = readw(host->regs + NFC_CONFIG1);
-		if (spare_only)
-			config1 |= NFC_SP_EN;
-		else
-			config1 &= ~(NFC_SP_EN);
-		writew(config1, host->regs + NFC_CONFIG1);
-	}
-
 	writew(ops, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
@@ -278,6 +268,7 @@ static void send_read_id(struct mxc_nand_host *host)
 		writeb(readb(main_buf + 8), main_buf + 4);
 		writeb(readb(main_buf + 10), main_buf + 5);
 	}
+	memcpy(host->data_buf, host->regs + MAIN_AREA0, 16);
 }
 
 /* This function requests the NANDFC to perform a read of the
@@ -363,32 +354,14 @@ static u_char mxc_nand_read_byte(struct mtd_info *mtd)
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	uint8_t ret = 0;
-	uint16_t col, rd_word;
-	uint16_t __iomem *main_buf = host->regs + MAIN_AREA0;
-	uint16_t __iomem *spare_buf = host->regs + SPARE_AREA0;
+	uint8_t ret;
 
 	/* Check for status request */
 	if (host->status_request)
 		return get_dev_status(host) & 0xFF;
 
-	/* Get column for 16-bit access */
-	col = host->col_addr >> 1;
-
-	/* If we are accessing the spare region */
-	if (host->spare_only)
-		rd_word = readw(&spare_buf[col]);
-	else
-		rd_word = readw(&main_buf[col]);
-
-	/* Pick upper/lower byte of word from RAM buffer */
-	if (host->col_addr & 0x1)
-		ret = (rd_word >> 8) & 0xFF;
-	else
-		ret = rd_word & 0xFF;
-
-	/* Update saved column address */
-	host->col_addr++;
+	ret = *(uint8_t *)(host->data_buf + host->buf_start);
+	host->buf_start++;
 
 	return ret;
 }
@@ -397,33 +370,10 @@ static uint16_t mxc_nand_read_word(struct mtd_info *mtd)
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	uint16_t col, rd_word, ret;
-	uint16_t __iomem *p;
+	uint16_t ret;
 
-	DEBUG(MTD_DEBUG_LEVEL3,
-	      "mxc_nand_read_word(col = %d)\n", host->col_addr);
-
-	col = host->col_addr;
-	/* Adjust saved column address */
-	if (col < mtd->writesize && host->spare_only)
-		col += mtd->writesize;
-
-	if (col < mtd->writesize)
-		p = (host->regs + MAIN_AREA0) + (col >> 1);
-	else
-		p = (host->regs + SPARE_AREA0) + ((col - mtd->writesize) >> 1);
-
-	if (col & 1) {
-		rd_word = readw(p);
-		ret = (rd_word >> 8) & 0xff;
-		rd_word = readw(&p[1]);
-		ret |= (rd_word << 8) & 0xff00;
-
-	} else
-		ret = readw(p);
-
-	/* Update saved column address */
-	host->col_addr = col + 2;
+	ret = *(uint16_t *)(host->data_buf + host->buf_start);
+	host->buf_start += 2;
 
 	return ret;
 }
@@ -436,94 +386,14 @@ static void mxc_nand_write_buf(struct mtd_info *mtd,
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	int n, col, i = 0;
-
-	DEBUG(MTD_DEBUG_LEVEL3,
-	      "mxc_nand_write_buf(col = %d, len = %d)\n", host->col_addr,
-	      len);
-
-	col = host->col_addr;
-
-	/* Adjust saved column address */
-	if (col < mtd->writesize && host->spare_only)
-		col += mtd->writesize;
-
-	n = mtd->writesize + mtd->oobsize - col;
-	n = min(len, n);
-
-	DEBUG(MTD_DEBUG_LEVEL3,
-	      "%s:%d: col = %d, n = %d\n", __func__, __LINE__, col, n);
-
-	while (n) {
-		void __iomem *p;
-
-		if (col < mtd->writesize)
-			p = host->regs + MAIN_AREA0 + (col & ~3);
-		else
-			p = host->regs + SPARE_AREA0 -
-						mtd->writesize + (col & ~3);
-
-		DEBUG(MTD_DEBUG_LEVEL3, "%s:%d: p = %p\n", __func__,
-		      __LINE__, p);
-
-		if (((col | (int)&buf[i]) & 3) || n < 16) {
-			uint32_t data = 0;
-
-			if (col & 3 || n < 4)
-				data = readl(p);
-
-			switch (col & 3) {
-			case 0:
-				if (n) {
-					data = (data & 0xffffff00) |
-					    (buf[i++] << 0);
-					n--;
-					col++;
-				}
-			case 1:
-				if (n) {
-					data = (data & 0xffff00ff) |
-					    (buf[i++] << 8);
-					n--;
-					col++;
-				}
-			case 2:
-				if (n) {
-					data = (data & 0xff00ffff) |
-					    (buf[i++] << 16);
-					n--;
-					col++;
-				}
-			case 3:
-				if (n) {
-					data = (data & 0x00ffffff) |
-					    (buf[i++] << 24);
-					n--;
-					col++;
-				}
-			}
-
-			writel(data, p);
-		} else {
-			int m = mtd->writesize - col;
+	u16 col = host->buf_start;
+	int n = mtd->oobsize + mtd->writesize - col;
 
-			if (col >= mtd->writesize)
-				m += mtd->oobsize;
+	n = min(n, len);
 
-			m = min(n, m) & ~3;
+	memcpy(host->data_buf + col, buf, n);
 
-			DEBUG(MTD_DEBUG_LEVEL3,
-			      "%s:%d: n = %d, m = %d, i = %d, col = %d\n",
-			      __func__,  __LINE__, n, m, i, col);
-
-			memcpy(p, &buf[i], m);
-			col += m;
-			i += m;
-			n -= m;
-		}
-	}
-	/* Update saved column address */
-	host->col_addr = col;
+	host->buf_start += n;
 }
 
 /* Read the data buffer from the NAND Flash. To read the data from NAND
@@ -534,75 +404,14 @@ static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	int n, col, i = 0;
+	u16 col = host->buf_start;
+	int n = mtd->oobsize + mtd->writesize - col;
 
-	DEBUG(MTD_DEBUG_LEVEL3,
-	      "mxc_nand_read_buf(col = %d, len = %d)\n", host->col_addr, len);
-
-	col = host->col_addr;
-
-	/* Adjust saved column address */
-	if (col < mtd->writesize && host->spare_only)
-		col += mtd->writesize;
-
-	n = mtd->writesize + mtd->oobsize - col;
-	n = min(len, n);
-
-	while (n) {
-		void __iomem *p;
-
-		if (col < mtd->writesize)
-			p = host->regs + MAIN_AREA0 + (col & ~3);
-		else
-			p = host->regs + SPARE_AREA0 -
-					mtd->writesize + (col & ~3);
-
-		if (((col | (int)&buf[i]) & 3) || n < 16) {
-			uint32_t data;
-
-			data = readl(p);
-			switch (col & 3) {
-			case 0:
-				if (n) {
-					buf[i++] = (uint8_t) (data);
-					n--;
-					col++;
-				}
-			case 1:
-				if (n) {
-					buf[i++] = (uint8_t) (data >> 8);
-					n--;
-					col++;
-				}
-			case 2:
-				if (n) {
-					buf[i++] = (uint8_t) (data >> 16);
-					n--;
-					col++;
-				}
-			case 3:
-				if (n) {
-					buf[i++] = (uint8_t) (data >> 24);
-					n--;
-					col++;
-				}
-			}
-		} else {
-			int m = mtd->writesize - col;
+	n = min(n, len);
 
-			if (col >= mtd->writesize)
-				m += mtd->oobsize;
-
-			m = min(n, m) & ~3;
-			memcpy(&buf[i], p, m);
-			col += m;
-			i += m;
-			n -= m;
-		}
-	}
-	/* Update saved column address */
-	host->col_addr = col;
+	memcpy(buf, host->data_buf + col, len);
 
+	host->buf_start += len;
 }
 
 /* Used by the upper layer to verify the data in NAND Flash
@@ -641,6 +450,36 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
 	}
 }
 
+/*
+ * Function to transfer data to/from spare area.
+ */
+static void copy_spare(struct mtd_info *mtd, bool bfrom)
+{
+	struct nand_chip *this = mtd->priv;
+	struct mxc_nand_host *host = this->priv;
+	u16 i, j;
+	u16 n = mtd->writesize >> 9;
+	u8 *d = host->data_buf + mtd->writesize;
+	u8 *s = host->regs + SPARE_AREA0;
+	u16 t = host->spare_len;
+
+	j = (mtd->oobsize / n >> 1) << 1;
+
+	if (bfrom) {
+		for (i = 0; i < n - 1; i++)
+			memcpy(d + i * j, s + i * t, j);
+
+		/* the last section */
+		memcpy(d + i * j, s + i * t, mtd->oobsize - i * j);
+	} else {
+		for (i = 0; i < n - 1; i++)
+			memcpy(&s[i * t], &d[i * j], j);
+
+		/* the last section */
+		memcpy(&s[i * t], &d[i * j], mtd->oobsize - i * j);
+	}
+}
+
 static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
 {
 	struct nand_chip *nand_chip = mtd->priv;
@@ -707,19 +546,18 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	switch (command) {
 
 	case NAND_CMD_STATUS:
-		host->col_addr = 0;
+		host->buf_start = 0;
 		host->status_request = true;
 		break;
 
 	case NAND_CMD_READ0:
-		host->col_addr = column;
-		host->spare_only = false;
+		host->buf_start = column;
 		useirq = false;
 		break;
 
 	case NAND_CMD_READOOB:
-		host->col_addr = column;
-		host->spare_only = true;
+		host->buf_start = column + mtd->writesize;
+
 		useirq = false;
 		if (host->pagesize_2k)
 			command = NAND_CMD_READ0; /* only READ0 is valid */
@@ -739,15 +577,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 				mxc_nand_command(mtd, NAND_CMD_READ0, 0,
 						page_addr);
 
-			host->col_addr = column - mtd->writesize;
-			host->spare_only = true;
+			host->buf_start = column;
 
 			/* Set program pointer to spare region */
 			if (!host->pagesize_2k)
 				send_cmd(host, NAND_CMD_READOOB, false);
 		} else {
-			host->spare_only = false;
-			host->col_addr = column;
+			host->buf_start = column;
 
 			/* Set program pointer to page start */
 			if (!host->pagesize_2k)
@@ -757,13 +593,15 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		break;
 
 	case NAND_CMD_PAGEPROG:
-		send_page(host, 0, host->spare_only, NFC_INPUT);
+		memcpy(host->regs + MAIN_AREA0, host->data_buf, mtd->writesize);
+		copy_spare(mtd, false);
+		send_page(host, 0, NFC_INPUT);
 
 		if (host->pagesize_2k) {
 			/* data in 4 areas datas */
-			send_page(host, 1, host->spare_only, NFC_INPUT);
-			send_page(host, 2, host->spare_only, NFC_INPUT);
-			send_page(host, 3, host->spare_only, NFC_INPUT);
+			send_page(host, 1, NFC_INPUT);
+			send_page(host, 2, NFC_INPUT);
+			send_page(host, 3, NFC_INPUT);
 		}
 
 		break;
@@ -789,16 +627,18 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			/* send read confirm command */
 			send_cmd(host, NAND_CMD_READSTART, true);
 			/* read for each AREA */
-			send_page(host, 0, host->spare_only, NFC_OUTPUT);
-			send_page(host, 1, host->spare_only, NFC_OUTPUT);
-			send_page(host, 2, host->spare_only, NFC_OUTPUT);
-			send_page(host, 3, host->spare_only, NFC_OUTPUT);
+			send_page(host, 0, NFC_OUTPUT);
+			send_page(host, 1, NFC_OUTPUT);
+			send_page(host, 2, NFC_OUTPUT);
+			send_page(host, 3, NFC_OUTPUT);
 		} else
-			send_page(host, 0, host->spare_only, NFC_OUTPUT);
+			send_page(host, 0, NFC_OUTPUT);
+
+		memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
+		copy_spare(mtd, true);
 		break;
 
 	case NAND_CMD_READID:
-		host->col_addr = 0;
 		send_read_id(host);
 		break;
 
@@ -824,10 +664,14 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	int err = 0, nr_parts = 0;
 
 	/* Allocate memory for MTD device structure and private data */
-	host = kzalloc(sizeof(struct mxc_nand_host), GFP_KERNEL);
+	host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE +
+			NAND_MAX_OOBSIZE, GFP_KERNEL);
 	if (!host)
 		return -ENOMEM;
 
+	host->data_buf = (uint8_t *)(host + 1);
+	host->spare_len = 16;
+
 	host->dev = &pdev->dev;
 	/* structures must be linked */
 	this = &host->nand;
-- 
cgit v1.2.3


From 89121a6bfecf4bd81b360fa1b3ae8875ed3e4a71 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 17:18:01 +0200
Subject: mxc nand: simplify command processing

Instead of having two switch/case with other operations
in between, use only one switch/case

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 81 ++++++++++++++++++++-------------------------
 1 file changed, 35 insertions(+), 46 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 03d20086170b..67ddc35ca7bc 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -533,7 +533,6 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 {
 	struct nand_chip *nand_chip = mtd->priv;
 	struct mxc_nand_host *host = nand_chip->priv;
-	int useirq = true;
 
 	DEBUG(MTD_DEBUG_LEVEL3,
 	      "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
@@ -548,19 +547,37 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	case NAND_CMD_STATUS:
 		host->buf_start = 0;
 		host->status_request = true;
-		break;
 
-	case NAND_CMD_READ0:
-		host->buf_start = column;
-		useirq = false;
+		send_cmd(host, command, true);
+		mxc_do_addr_cycle(mtd, column, page_addr);
 		break;
 
+	case NAND_CMD_READ0:
 	case NAND_CMD_READOOB:
-		host->buf_start = column + mtd->writesize;
+		if (command == NAND_CMD_READ0)
+			host->buf_start = column;
+		else
+			host->buf_start = column + mtd->writesize;
 
-		useirq = false;
 		if (host->pagesize_2k)
 			command = NAND_CMD_READ0; /* only READ0 is valid */
+
+		send_cmd(host, command, false);
+		mxc_do_addr_cycle(mtd, column, page_addr);
+
+		if (host->pagesize_2k) {
+			/* send read confirm command */
+			send_cmd(host, NAND_CMD_READSTART, true);
+			/* read for each AREA */
+			send_page(host, 0, NFC_OUTPUT);
+			send_page(host, 1, NFC_OUTPUT);
+			send_page(host, 2, NFC_OUTPUT);
+			send_page(host, 3, NFC_OUTPUT);
+		} else
+			send_page(host, 0, NFC_OUTPUT);
+
+		memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
+		copy_spare(mtd, true);
 		break;
 
 	case NAND_CMD_SEQIN:
@@ -589,7 +606,9 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			if (!host->pagesize_2k)
 				send_cmd(host, NAND_CMD_READ0, false);
 		}
-		useirq = false;
+
+		send_cmd(host, command, false);
+		mxc_do_addr_cycle(mtd, column, page_addr);
 		break;
 
 	case NAND_CMD_PAGEPROG:
@@ -604,51 +623,21 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			send_page(host, 3, NFC_INPUT);
 		}
 
-		break;
-
-	case NAND_CMD_ERASE1:
-		useirq = false;
-		break;
-	}
-
-	/* Write out the command to the device. */
-	send_cmd(host, command, useirq);
-	mxc_do_addr_cycle(mtd, column, page_addr);
-
-	/* Command post-processing step */
-	switch (command) {
-
-	case NAND_CMD_RESET:
-		break;
-
-	case NAND_CMD_READOOB:
-	case NAND_CMD_READ0:
-		if (host->pagesize_2k) {
-			/* send read confirm command */
-			send_cmd(host, NAND_CMD_READSTART, true);
-			/* read for each AREA */
-			send_page(host, 0, NFC_OUTPUT);
-			send_page(host, 1, NFC_OUTPUT);
-			send_page(host, 2, NFC_OUTPUT);
-			send_page(host, 3, NFC_OUTPUT);
-		} else
-			send_page(host, 0, NFC_OUTPUT);
-
-		memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
-		copy_spare(mtd, true);
+		send_cmd(host, command, true);
+		mxc_do_addr_cycle(mtd, column, page_addr);
 		break;
 
 	case NAND_CMD_READID:
+		send_cmd(host, command, true);
+		mxc_do_addr_cycle(mtd, column, page_addr);
 		send_read_id(host);
 		break;
 
-	case NAND_CMD_PAGEPROG:
-		break;
-
-	case NAND_CMD_STATUS:
-		break;
-
+	case NAND_CMD_ERASE1:
 	case NAND_CMD_ERASE2:
+		send_cmd(host, command, false);
+		mxc_do_addr_cycle(mtd, column, page_addr);
+
 		break;
 	}
 }
-- 
cgit v1.2.3


From c5d23f1bf384e4a17bc4a014313a4157c015a820 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 4 Jun 2009 17:25:53 +0200
Subject: mxc nand: modify send_page to send all pages, not only one

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 45 ++++++++++++++++++++-------------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 67ddc35ca7bc..1131ad126fd2 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -228,16 +228,25 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 	wait_op_done(host, TROP_US_DELAY, islast);
 }
 
-static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
-		unsigned int ops)
+static void send_page(struct mxc_nand_host *host, unsigned int ops)
 {
-	/* NANDFC buffer 0 is used for page read/write */
-	writew(buf_id, host->regs + NFC_BUF_ADDR);
+	int bufs, i;
 
-	writew(ops, host->regs + NFC_CONFIG2);
+	if (host->pagesize_2k)
+		bufs = 4;
+	else
+		bufs = 1;
 
-	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, true);
+	for (i = 0; i < bufs; i++) {
+
+		/* NANDFC buffer 0 is used for page read/write */
+		writew(i, host->regs + NFC_BUF_ADDR);
+
+		writew(ops, host->regs + NFC_CONFIG2);
+
+		/* Wait for operation to complete */
+		wait_op_done(host, TROP_US_DELAY, true);
+	}
 }
 
 /* Request the NANDFC to perform a read of the NAND device ID. */
@@ -565,16 +574,10 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		send_cmd(host, command, false);
 		mxc_do_addr_cycle(mtd, column, page_addr);
 
-		if (host->pagesize_2k) {
-			/* send read confirm command */
+		if (host->pagesize_2k)
 			send_cmd(host, NAND_CMD_READSTART, true);
-			/* read for each AREA */
-			send_page(host, 0, NFC_OUTPUT);
-			send_page(host, 1, NFC_OUTPUT);
-			send_page(host, 2, NFC_OUTPUT);
-			send_page(host, 3, NFC_OUTPUT);
-		} else
-			send_page(host, 0, NFC_OUTPUT);
+
+		send_page(host, NFC_OUTPUT);
 
 		memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
 		copy_spare(mtd, true);
@@ -614,15 +617,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	case NAND_CMD_PAGEPROG:
 		memcpy(host->regs + MAIN_AREA0, host->data_buf, mtd->writesize);
 		copy_spare(mtd, false);
-		send_page(host, 0, NFC_INPUT);
-
-		if (host->pagesize_2k) {
-			/* data in 4 areas datas */
-			send_page(host, 1, NFC_INPUT);
-			send_page(host, 2, NFC_INPUT);
-			send_page(host, 3, NFC_INPUT);
-		}
-
+		send_page(host, NFC_INPUT);
 		send_cmd(host, command, true);
 		mxc_do_addr_cycle(mtd, column, page_addr);
 		break;
-- 
cgit v1.2.3


From 0e60c7c4015f051ff921e6c30844f31e17f8ad95 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 5 Jun 2009 10:55:32 +0200
Subject: mxc_nand: remove unused defines

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 1131ad126fd2..ab6db698cbd8 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -122,13 +122,6 @@ struct mxc_nand_host {
 
 /* Define delays in microsec for NAND device operations */
 #define TROP_US_DELAY   2000
-/* Macros to get byte and bit positions of ECC */
-#define COLPOS(x)  ((x) >> 3)
-#define BITPOS(x) ((x) & 0xf)
-
-/* Define single bit Error positions in Main & Spare area */
-#define MAIN_SINGLEBIT_ERROR 0x4
-#define SPARE_SINGLEBIT_ERROR 0x1
 
 /* OOB placement block for use with hardware ecc generation */
 static struct nand_ecclayout nand_hw_eccoob_smallpage = {
-- 
cgit v1.2.3


From c6de7e1bb8d6e1b3ae318bf9fbe84557d7c8baec Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Mon, 5 Oct 2009 11:14:35 +0200
Subject: mxc_nand: Make main/spare areas runtime configurable

The main/spare areas are on different addresses on later versions
of the controller, so make them configurable.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 42 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index ab6db698cbd8..c84fd6c35496 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -52,18 +52,6 @@
 #define NFC_CONFIG1		0xE1A
 #define NFC_CONFIG2		0xE1C
 
-/* Addresses for NFC RAM BUFFER Main area 0 */
-#define MAIN_AREA0		0x000
-#define MAIN_AREA1		0x200
-#define MAIN_AREA2		0x400
-#define MAIN_AREA3		0x600
-
-/* Addresses for NFC SPARE BUFFER Spare area 0 */
-#define SPARE_AREA0		0x800
-#define SPARE_AREA1		0x810
-#define SPARE_AREA2		0x820
-#define SPARE_AREA3		0x830
-
 /* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
  * for Command operation */
 #define NFC_CMD            0x1
@@ -106,6 +94,11 @@ struct mxc_nand_host {
 	struct mtd_partition	*parts;
 	struct device		*dev;
 
+	void			*spare0;
+	void			*main_area0;
+	void			*main_area1;
+
+	void __iomem		*base;
 	void __iomem		*regs;
 	int			status_request;
 	int			pagesize_2k;
@@ -262,7 +255,7 @@ static void send_read_id(struct mxc_nand_host *host)
 	wait_op_done(host, TROP_US_DELAY, true);
 
 	if (this->options & NAND_BUSWIDTH_16) {
-		void __iomem *main_buf = host->regs + MAIN_AREA0;
+		void __iomem *main_buf = host->main_area0;
 		/* compress the ID info */
 		writeb(readb(main_buf + 2), main_buf + 1);
 		writeb(readb(main_buf + 4), main_buf + 2);
@@ -270,14 +263,14 @@ static void send_read_id(struct mxc_nand_host *host)
 		writeb(readb(main_buf + 8), main_buf + 4);
 		writeb(readb(main_buf + 10), main_buf + 5);
 	}
-	memcpy(host->data_buf, host->regs + MAIN_AREA0, 16);
+	memcpy(host->data_buf, host->main_area0, 16);
 }
 
 /* This function requests the NANDFC to perform a read of the
  * NAND device status and returns the current status. */
 static uint16_t get_dev_status(struct mxc_nand_host *host)
 {
-	void __iomem *main_buf = host->regs + MAIN_AREA1;
+	void __iomem *main_buf = host->main_area1;
 	uint32_t store;
 	uint16_t ret, tmp;
 	/* Issue status request to NAND device */
@@ -462,7 +455,7 @@ static void copy_spare(struct mtd_info *mtd, bool bfrom)
 	u16 i, j;
 	u16 n = mtd->writesize >> 9;
 	u8 *d = host->data_buf + mtd->writesize;
-	u8 *s = host->regs + SPARE_AREA0;
+	u8 *s = host->spare0;
 	u16 t = host->spare_len;
 
 	j = (mtd->oobsize / n >> 1) << 1;
@@ -572,7 +565,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 
 		send_page(host, NFC_OUTPUT);
 
-		memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
+		memcpy(host->data_buf, host->main_area0, mtd->writesize);
 		copy_spare(mtd, true);
 		break;
 
@@ -608,7 +601,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		break;
 
 	case NAND_CMD_PAGEPROG:
-		memcpy(host->regs + MAIN_AREA0, host->data_buf, mtd->writesize);
+		memcpy(host->main_area0, host->data_buf, mtd->writesize);
 		copy_spare(mtd, false);
 		send_page(host, NFC_INPUT);
 		send_cmd(host, command, true);
@@ -686,12 +679,17 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto eres;
 	}
 
-	host->regs = ioremap(res->start, resource_size(res));
-	if (!host->regs) {
+	host->base = ioremap(res->start, resource_size(res));
+	if (!host->base) {
 		err = -ENOMEM;
 		goto eres;
 	}
 
+	host->regs = host->base;
+	host->main_area0 = host->base;
+	host->main_area1 = host->base + 0x200;
+	host->spare0 = host->base + 0x800;
+
 	tmp = readw(host->regs + NFC_CONFIG1);
 	tmp |= NFC_INT_MSK;
 	writew(tmp, host->regs + NFC_CONFIG1);
@@ -778,7 +776,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 escan:
 	free_irq(host->irq, host);
 eirq:
-	iounmap(host->regs);
+	iounmap(host->base);
 eres:
 	clk_put(host->clk);
 eclk:
@@ -797,7 +795,7 @@ static int __exit mxcnd_remove(struct platform_device *pdev)
 
 	nand_release(&host->mtd);
 	free_irq(host->irq, host);
-	iounmap(host->regs);
+	iounmap(host->base);
 	kfree(host);
 
 	return 0;
-- 
cgit v1.2.3


From 2d69c7fadd8580a7cea3ae0caa90a1c2a92ab021 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Mon, 5 Oct 2009 11:24:02 +0200
Subject: mxc_nand: Get rid of pagesize_2k flag

Later versions of this controller also allow 4k pagesize,
so use mtd->writesize instead of a flag.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index c84fd6c35496..09b9aab6823d 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -101,7 +101,6 @@ struct mxc_nand_host {
 	void __iomem		*base;
 	void __iomem		*regs;
 	int			status_request;
-	int			pagesize_2k;
 	struct clk		*clk;
 	int			clk_act;
 	int			irq;
@@ -214,11 +213,13 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 	wait_op_done(host, TROP_US_DELAY, islast);
 }
 
-static void send_page(struct mxc_nand_host *host, unsigned int ops)
+static void send_page(struct mtd_info *mtd, unsigned int ops)
 {
+	struct nand_chip *nand_chip = mtd->priv;
+	struct mxc_nand_host *host = nand_chip->priv;
 	int bufs, i;
 
-	if (host->pagesize_2k)
+	if (mtd->writesize > 512)
 		bufs = 4;
 	else
 		bufs = 1;
@@ -490,7 +491,7 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
 		 * the full page.
 		 */
 		send_addr(host, 0, page_addr == -1);
-		if (host->pagesize_2k)
+		if (mtd->writesize > 512)
 			/* another col addr cycle for 2k page */
 			send_addr(host, 0, false);
 	}
@@ -500,7 +501,7 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
 		/* paddr_0 - p_addr_7 */
 		send_addr(host, (page_addr & 0xff), false);
 
-		if (host->pagesize_2k) {
+		if (mtd->writesize > 512) {
 			if (mtd->size >= 0x10000000) {
 				/* paddr_8 - paddr_15 */
 				send_addr(host, (page_addr >> 8) & 0xff, false);
@@ -554,16 +555,16 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		else
 			host->buf_start = column + mtd->writesize;
 
-		if (host->pagesize_2k)
+		if (mtd->writesize > 512)
 			command = NAND_CMD_READ0; /* only READ0 is valid */
 
 		send_cmd(host, command, false);
 		mxc_do_addr_cycle(mtd, column, page_addr);
 
-		if (host->pagesize_2k)
+		if (mtd->writesize > 512)
 			send_cmd(host, NAND_CMD_READSTART, true);
 
-		send_page(host, NFC_OUTPUT);
+		send_page(mtd, NFC_OUTPUT);
 
 		memcpy(host->data_buf, host->main_area0, mtd->writesize);
 		copy_spare(mtd, true);
@@ -578,7 +579,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			 * pointer to spare area, we must write the whole page
 			 * including OOB together.
 			 */
-			if (host->pagesize_2k)
+			if (mtd->writesize > 512)
 				/* call ourself to read a page */
 				mxc_nand_command(mtd, NAND_CMD_READ0, 0,
 						page_addr);
@@ -586,13 +587,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 			host->buf_start = column;
 
 			/* Set program pointer to spare region */
-			if (!host->pagesize_2k)
+			if (mtd->writesize == 512)
 				send_cmd(host, NAND_CMD_READOOB, false);
 		} else {
 			host->buf_start = column;
 
 			/* Set program pointer to page start */
-			if (!host->pagesize_2k)
+			if (mtd->writesize == 512)
 				send_cmd(host, NAND_CMD_READ0, false);
 		}
 
@@ -603,7 +604,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	case NAND_CMD_PAGEPROG:
 		memcpy(host->main_area0, host->data_buf, mtd->writesize);
 		copy_spare(mtd, false);
-		send_page(host, NFC_INPUT);
+		send_page(mtd, NFC_INPUT);
 		send_cmd(host, command, true);
 		mxc_do_addr_cycle(mtd, column, page_addr);
 		break;
@@ -745,10 +746,8 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto escan;
 	}
 
-	if (mtd->writesize == 2048) {
-		host->pagesize_2k = 1;
+	if (mtd->writesize == 2048)
 		this->ecc.layout = &nand_hw_eccoob_largepage;
-	}
 
 	/* second phase scan */
 	if (nand_scan_tail(mtd)) {
-- 
cgit v1.2.3


From 9467114ef43c971f0ae8aee3729d412125a2f432 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Mon, 5 Oct 2009 12:14:21 +0200
Subject: mxc_nand: Add NFC V2 support

The v2 version of this controller is used on i.MX35/25 SoCs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 81 +++++++++++++++++++++++++++++++++++++--------
 1 file changed, 68 insertions(+), 13 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 09b9aab6823d..4a696820d6d4 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -33,9 +33,13 @@
 
 #include <asm/mach/flash.h>
 #include <mach/mxc_nand.h>
+#include <mach/hardware.h>
 
 #define DRIVER_NAME "mxc_nand"
 
+#define nfc_is_v21()		(cpu_is_mx25() || cpu_is_mx35())
+#define nfc_is_v1()		(cpu_is_mx31() || cpu_is_mx27())
+
 /* Addresses for NFC registers */
 #define NFC_BUF_SIZE		0xE00
 #define NFC_BUF_ADDR		0xE04
@@ -46,8 +50,10 @@
 #define NFC_RSLTMAIN_AREA	0xE0E
 #define NFC_RSLTSPARE_AREA	0xE10
 #define NFC_WRPROT		0xE12
-#define NFC_UNLOCKSTART_BLKADDR	0xE14
-#define NFC_UNLOCKEND_BLKADDR	0xE16
+#define NFC_V1_UNLOCKSTART_BLKADDR	0xe14
+#define NFC_V1_UNLOCKEND_BLKADDR	0xe16
+#define NFC_V21_UNLOCKSTART_BLKADDR	0xe20
+#define NFC_V21_UNLOCKEND_BLKADDR	0xe22
 #define NFC_NF_WRPRST		0xE18
 #define NFC_CONFIG1		0xE1A
 #define NFC_CONFIG2		0xE1C
@@ -116,19 +122,47 @@ struct mxc_nand_host {
 #define TROP_US_DELAY   2000
 
 /* OOB placement block for use with hardware ecc generation */
-static struct nand_ecclayout nand_hw_eccoob_smallpage = {
+static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
 	.eccbytes = 5,
 	.eccpos = {6, 7, 8, 9, 10},
 	.oobfree = {{0, 5}, {12, 4}, }
 };
 
-static struct nand_ecclayout nand_hw_eccoob_largepage = {
+static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
 	.eccbytes = 20,
 	.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
 		   38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
 	.oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
 };
 
+/* OOB description for 512 byte pages with 16 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
+	.eccbytes = 1 * 9,
+	.eccpos = {
+		 7,  8,  9, 10, 11, 12, 13, 14, 15
+	},
+	.oobfree = {
+		{.offset = 0, .length = 5}
+	}
+};
+
+/* OOB description for 2048 byte pages with 64 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
+	.eccbytes = 4 * 9,
+	.eccpos = {
+		 7,  8,  9, 10, 11, 12, 13, 14, 15,
+		23, 24, 25, 26, 27, 28, 29, 30, 31,
+		39, 40, 41, 42, 43, 44, 45, 46, 47,
+		55, 56, 57, 58, 59, 60, 61, 62, 63
+	},
+	.oobfree = {
+		{.offset = 2, .length = 4},
+		{.offset = 16, .length = 7},
+		{.offset = 32, .length = 7},
+		{.offset = 48, .length = 7}
+	}
+};
+
 #ifdef CONFIG_MTD_PARTITIONS
 static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
 #endif
@@ -219,7 +253,7 @@ static void send_page(struct mtd_info *mtd, unsigned int ops)
 	struct mxc_nand_host *host = nand_chip->priv;
 	int bufs, i;
 
-	if (mtd->writesize > 512)
+	if (nfc_is_v1() && mtd->writesize > 512)
 		bufs = 4;
 	else
 		bufs = 1;
@@ -613,6 +647,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		send_cmd(host, command, true);
 		mxc_do_addr_cycle(mtd, column, page_addr);
 		send_read_id(host);
+		host->buf_start = column;
 		break;
 
 	case NAND_CMD_ERASE1:
@@ -633,6 +668,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	struct resource *res;
 	uint16_t tmp;
 	int err = 0, nr_parts = 0;
+	struct nand_ecclayout *oob_smallpage, *oob_largepage;
 
 	/* Allocate memory for MTD device structure and private data */
 	host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE +
@@ -641,7 +677,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	host->data_buf = (uint8_t *)(host + 1);
-	host->spare_len = 16;
 
 	host->dev = &pdev->dev;
 	/* structures must be linked */
@@ -686,10 +721,23 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto eres;
 	}
 
-	host->regs = host->base;
 	host->main_area0 = host->base;
 	host->main_area1 = host->base + 0x200;
-	host->spare0 = host->base + 0x800;
+
+	if (nfc_is_v21()) {
+		host->regs = host->base + 0x1000;
+		host->spare0 = host->base + 0x1000;
+		host->spare_len = 64;
+		oob_smallpage = &nandv2_hw_eccoob_smallpage;
+		oob_largepage = &nandv2_hw_eccoob_largepage;
+	} else if (nfc_is_v1()) {
+		host->regs = host->base;
+		host->spare0 = host->base + 0x800;
+		host->spare_len = 16;
+		oob_smallpage = &nandv1_hw_eccoob_smallpage;
+		oob_largepage = &nandv1_hw_eccoob_largepage;
+	} else
+		BUG();
 
 	tmp = readw(host->regs + NFC_CONFIG1);
 	tmp |= NFC_INT_MSK;
@@ -711,15 +759,22 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	writew(0x2, host->regs + NFC_CONFIG);
 
 	/* Blocks to be unlocked */
-	writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
-	writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
+	if (nfc_is_v21()) {
+		writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
+	        writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
+		this->ecc.bytes = 9;
+	} else if (nfc_is_v1()) {
+		writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
+	        writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
+		this->ecc.bytes = 3;
+	} else
+		BUG();
 
 	/* Unlock Block Command for given address range */
 	writew(0x4, host->regs + NFC_WRPROT);
 
 	this->ecc.size = 512;
-	this->ecc.bytes = 3;
-	this->ecc.layout = &nand_hw_eccoob_smallpage;
+	this->ecc.layout = oob_smallpage;
 
 	if (pdata->hw_ecc) {
 		this->ecc.calculate = mxc_nand_calculate_ecc;
@@ -747,7 +802,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	}
 
 	if (mtd->writesize == 2048)
-		this->ecc.layout = &nand_hw_eccoob_largepage;
+		this->ecc.layout = oob_largepage;
 
 	/* second phase scan */
 	if (nand_scan_tail(mtd)) {
-- 
cgit v1.2.3


From f06368f7d15f6fc323ba0c71aec67b9b2dd5614a Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Mon, 5 Oct 2009 17:18:42 +0200
Subject: mxc_nand: disable sp_en bit only once

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 4a696820d6d4..2e3f3fbcd67c 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -274,16 +274,10 @@ static void send_page(struct mtd_info *mtd, unsigned int ops)
 static void send_read_id(struct mxc_nand_host *host)
 {
 	struct nand_chip *this = &host->nand;
-	uint16_t tmp;
 
 	/* NANDFC buffer 0 is used for device ID output */
 	writew(0x0, host->regs + NFC_BUF_ADDR);
 
-	/* Read ID into main buffer */
-	tmp = readw(host->regs + NFC_CONFIG1);
-	tmp &= ~NFC_SP_EN;
-	writew(tmp, host->regs + NFC_CONFIG1);
-
 	writew(NFC_ID, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
@@ -307,7 +301,7 @@ static uint16_t get_dev_status(struct mxc_nand_host *host)
 {
 	void __iomem *main_buf = host->main_area1;
 	uint32_t store;
-	uint16_t ret, tmp;
+	uint16_t ret;
 	/* Issue status request to NAND device */
 
 	/* store the main area1 first word, later do recovery */
@@ -316,11 +310,6 @@ static uint16_t get_dev_status(struct mxc_nand_host *host)
 	 * corruption of read/write buffer on status requests. */
 	writew(1, host->regs + NFC_BUF_ADDR);
 
-	/* Read status into main buffer */
-	tmp = readw(host->regs + NFC_CONFIG1);
-	tmp &= ~NFC_SP_EN;
-	writew(tmp, host->regs + NFC_CONFIG1);
-
 	writew(NFC_STATUS, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
@@ -739,8 +728,10 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	} else
 		BUG();
 
+	/* disable interrupt and spare enable */
 	tmp = readw(host->regs + NFC_CONFIG1);
 	tmp |= NFC_INT_MSK;
+	tmp &= ~NFC_SP_EN;
 	writew(tmp, host->regs + NFC_CONFIG1);
 
 	init_waitqueue_head(&host->irq_waitq);
-- 
cgit v1.2.3


From f1372055df21734f042f12ab92852e9d350be8d0 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 21 Oct 2009 14:25:27 +0200
Subject: mxc_nand: Allow flash based bbt

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/plat-mxc/include/mach/mxc_nand.h |  3 ++-
 drivers/mtd/nand/mxc_nand.c               | 34 +++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/arch/arm/plat-mxc/include/mach/mxc_nand.h b/arch/arm/plat-mxc/include/mach/mxc_nand.h
index 2b972df22d12..5d2d21d414e0 100644
--- a/arch/arm/plat-mxc/include/mach/mxc_nand.h
+++ b/arch/arm/plat-mxc/include/mach/mxc_nand.h
@@ -22,6 +22,7 @@
 
 struct mxc_nand_platform_data {
 	int width;	/* data bus width in bytes */
-	int hw_ecc;	/* 0 if supress hardware ECC */
+	int hw_ecc:1;	/* 0 if supress hardware ECC */
+	int flash_bbt:1; /* set to 1 to use a flash based bbt */
 };
 #endif /* __ASM_ARCH_NAND_H */
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 2e3f3fbcd67c..044a57483027 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -648,6 +648,33 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	}
 }
 
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+	.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+	    | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+	.offs = 0,
+	.len = 4,
+	.veroffs = 4,
+	.maxblocks = 4,
+	.pattern = bbt_pattern,
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+	.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+	    | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+	.offs = 0,
+	.len = 4,
+	.veroffs = 4,
+	.maxblocks = 4,
+	.pattern = mirror_pattern,
+};
+
 static int __init mxcnd_probe(struct platform_device *pdev)
 {
 	struct nand_chip *this;
@@ -786,6 +813,13 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	if (pdata->width == 2)
 		this->options |= NAND_BUSWIDTH_16;
 
+	if (pdata->flash_bbt) {
+		this->bbt_td = &bbt_main_descr;
+		this->bbt_md = &bbt_mirror_descr;
+		/* update flash based bbt */
+		this->options |= NAND_USE_FLASH_BBT;
+	}
+
 	/* first scan to find the device and get the page size */
 	if (nand_scan_ident(mtd, 1)) {
 		err = -ENXIO;
-- 
cgit v1.2.3


From c110eaf4659efcb110de2d7c90878240be5a13fa Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 21 Oct 2009 16:01:02 +0200
Subject: mxc_nand: remove TROP_US_DELAY

wait_op_done is only called with the same timeout, so
code the timeout into the function itself.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 044a57483027..30eeb4c65528 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -118,9 +118,6 @@ struct mxc_nand_host {
 	int			spare_len;
 };
 
-/* Define delays in microsec for NAND device operations */
-#define TROP_US_DELAY   2000
-
 /* OOB placement block for use with hardware ecc generation */
 static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
 	.eccbytes = 5,
@@ -185,10 +182,10 @@ static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
 /* This function polls the NANDFC to wait for the basic operation to
  * complete by checking the INT bit of config2 register.
  */
-static void wait_op_done(struct mxc_nand_host *host, int max_retries,
-				int useirq)
+static void wait_op_done(struct mxc_nand_host *host, int useirq)
 {
 	uint32_t tmp;
+	int max_retries = 2000;
 
 	if (useirq) {
 		if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
@@ -230,7 +227,7 @@ static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
 	writew(NFC_CMD, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, useirq);
+	wait_op_done(host, useirq);
 }
 
 /* This function sends an address (or partial address) to the
@@ -244,7 +241,7 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
 	writew(NFC_ADDR, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, islast);
+	wait_op_done(host, islast);
 }
 
 static void send_page(struct mtd_info *mtd, unsigned int ops)
@@ -266,7 +263,7 @@ static void send_page(struct mtd_info *mtd, unsigned int ops)
 		writew(ops, host->regs + NFC_CONFIG2);
 
 		/* Wait for operation to complete */
-		wait_op_done(host, TROP_US_DELAY, true);
+		wait_op_done(host, true);
 	}
 }
 
@@ -281,7 +278,7 @@ static void send_read_id(struct mxc_nand_host *host)
 	writew(NFC_ID, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, true);
+	wait_op_done(host, true);
 
 	if (this->options & NAND_BUSWIDTH_16) {
 		void __iomem *main_buf = host->main_area0;
@@ -313,7 +310,7 @@ static uint16_t get_dev_status(struct mxc_nand_host *host)
 	writew(NFC_STATUS, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-	wait_op_done(host, TROP_US_DELAY, true);
+	wait_op_done(host, true);
 
 	/* Status is placed in first word of main buffer */
 	/* get status, then recovery area 1 data */
-- 
cgit v1.2.3


From 1fbff0a6e975a986032881f139b806c23680f823 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 21 Oct 2009 16:06:27 +0200
Subject: mxc_nand: use DRIVER_NAME where appropriate

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 30eeb4c65528..53e94121c26f 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -698,7 +698,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	mtd->priv = this;
 	mtd->owner = THIS_MODULE;
 	mtd->dev.parent = &pdev->dev;
-	mtd->name = "mxc_nand";
+	mtd->name = DRIVER_NAME;
 
 	/* 50 us command delay time */
 	this->chip_delay = 5;
@@ -762,7 +762,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 
 	host->irq = platform_get_irq(pdev, 0);
 
-	err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host);
+	err = request_irq(host->irq, mxc_nfc_irq, 0, DRIVER_NAME, host);
 	if (err)
 		goto eirq;
 
-- 
cgit v1.2.3