openwrt/target/linux/ipq806x/patches/0150-mtd-nand-Add-Qualcomm-NAND-controller.patch

From d2981ca1343b837fc574c4e46806d041b258720d Mon Sep 17 00:00:00 2001
From: Andy Gross <agross@codeaurora.org>
Date: Mon, 16 Jun 2014 17:13:22 -0500
Subject: [PATCH 150/182] mtd: nand: Add Qualcomm NAND controller

This patch adds the Qualcomm NAND controller and required infrastructure.

Signed-off-by: Andy Gross <agross@codeaurora.org>
---
 drivers/mtd/nand/Kconfig        |   18 +
 drivers/mtd/nand/Makefile       |    2 +
 drivers/mtd/nand/qcom_adm_dma.c |  797 +++++
 drivers/mtd/nand/qcom_adm_dma.h |  268 ++
 drivers/mtd/nand/qcom_nand.c    | 7455 +++++++++++++++++++++++++++++++++++++++
 drivers/mtd/nand/qcom_nand.h    |  196 +
 6 files changed, 8736 insertions(+)
 create mode 100644 drivers/mtd/nand/qcom_adm_dma.c
 create mode 100644 drivers/mtd/nand/qcom_adm_dma.h
 create mode 100644 drivers/mtd/nand/qcom_nand.c
 create mode 100644 drivers/mtd/nand/qcom_nand.h

--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -510,4 +510,22 @@ config MTD_NAND_XWAY
 	  Enables support for NAND Flash chips on Lantiq XWAY SoCs. NAND is attached
 	  to the External Bus Unit (EBU).
 
+config MTD_QCOM_DMA
+	tristate "QCMO NAND DMA Support"
+	depends on ARCH_QCOM && MTD_QCOM_NAND
+	default n
+	help
+	  DMA support for QCOM NAND
+
+config MTD_QCOM_NAND
+	tristate "QCOM NAND Device Support"
+	depends on MTD && ARCH_QCOM
+	select CRC16
+	select BITREVERSE
+	select MTD_NAND_IDS
+	select MTD_QCOM_DMA
+	default y
+	help
+	  Support for some NAND chips connected to the QCOM NAND controller.
+
 endif # MTD_NAND
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -49,5 +49,7 @@ obj-$(CONFIG_MTD_NAND_JZ4740)		+= jz4740
 obj-$(CONFIG_MTD_NAND_GPMI_NAND)	+= gpmi-nand/
 obj-$(CONFIG_MTD_NAND_XWAY)		+= xway_nand.o
 obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH)	+= bcm47xxnflash/
+obj-$(CONFIG_MTD_QCOM_NAND)	+= qcom_nand.o
+obj-$(CONFIG_MTD_QCOM_DMA)	+= qcom_adm_dma.o
 
 nand-objs := nand_base.o nand_bbt.o
--- /dev/null
+++ b/drivers/mtd/nand/qcom_adm_dma.c
@@ -0,0 +1,797 @@
+/* * Copyright (c) 2012 The Linux Foundation. All rights reserved.* */
+/* linux/arch/arm/mach-msm/dma.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2008-2010, 2012 The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/reset-controller.h>
+#include "qcom_adm_dma.h"
+
+#define MODULE_NAME "msm_dmov"
+
+#define MSM_DMOV_CHANNEL_COUNT 16
+#define MSM_DMOV_CRCI_COUNT 16
+
+enum {
+	CLK_DIS,
+	CLK_TO_BE_DIS,
+	CLK_EN
+};
+
+struct msm_dmov_ci_conf {
+	int start;
+	int end;
+	int burst;
+};
+
+struct msm_dmov_crci_conf {
+	int sd;
+	int blk_size;
+};
+
+struct msm_dmov_chan_conf {
+	int sd;
+	int block;
+	int priority;
+};
+
+struct msm_dmov_conf {
+	void *base;
+	struct msm_dmov_crci_conf *crci_conf;
+	struct msm_dmov_chan_conf *chan_conf;
+	int channel_active;
+	int sd;
+	size_t sd_size;
+	struct list_head staged_commands[MSM_DMOV_CHANNEL_COUNT];
+	struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
+	struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
+	struct mutex lock;
+	spinlock_t list_lock;
+	unsigned int irq;
+	struct clk *clk;
+	struct clk *pclk;
+	struct clk *ebiclk;
+	unsigned int clk_ctl;
+	struct delayed_work work;
+	struct workqueue_struct *cmd_wq;
+
+	struct reset_control *adm_reset;
+	struct reset_control *pbus_reset;
+	struct reset_control *c0_reset;
+	struct reset_control *c1_reset;
+	struct reset_control *c2_reset;
+	
+};
+
+static void msm_dmov_clock_work(struct work_struct *);
+
+#define DMOV_CRCI_DEFAULT_CONF { .sd = 0, .blk_size = 0 }
+#define DMOV_CRCI_CONF(secd, blk) { .sd = secd, .blk_size = blk }
+
+static struct msm_dmov_crci_conf adm_crci_conf[] = {
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_CONF(0, 1),
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+	DMOV_CRCI_DEFAULT_CONF,
+};
+
+#define DMOV_CHANNEL_DEFAULT_CONF { .sd = 0, .block = 0, .priority = 1 }
+
+static struct msm_dmov_chan_conf adm_chan_conf[] = {
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+	DMOV_CHANNEL_DEFAULT_CONF,
+};
+
+#define DMOV_IRQ_TO_ADM(irq) 0
+
+static struct msm_dmov_conf dmov_conf[] = {
+	{
+		.crci_conf = adm_crci_conf,
+		.chan_conf = adm_chan_conf,
+		.lock = __MUTEX_INITIALIZER(dmov_conf[0].lock),
+		.list_lock = __SPIN_LOCK_UNLOCKED(dmov_list_lock),
+		.clk_ctl = CLK_EN,
+		.work = __DELAYED_WORK_INITIALIZER(dmov_conf[0].work,
+				msm_dmov_clock_work,0),
+	}
+};
+
+#define MSM_DMOV_ID_COUNT (MSM_DMOV_CHANNEL_COUNT * ARRAY_SIZE(dmov_conf))
+#define DMOV_REG(name, adm)    ((name) + (dmov_conf[adm].base) +\
+	(dmov_conf[adm].sd * dmov_conf[adm].sd_size))
+#define DMOV_ID_TO_ADM(id)   ((id) / MSM_DMOV_CHANNEL_COUNT)
+#define DMOV_ID_TO_CHAN(id)   ((id) % MSM_DMOV_CHANNEL_COUNT)
+#define DMOV_CHAN_ADM_TO_ID(ch, adm) ((ch) + (adm) * MSM_DMOV_CHANNEL_COUNT)
+
+enum {
+	MSM_DMOV_PRINT_ERRORS = 1,
+	MSM_DMOV_PRINT_IO = 2,
+	MSM_DMOV_PRINT_FLOW = 4
+};
+
+unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
+
+#define MSM_DMOV_DPRINTF(mask, format, args...) \
+	do { \
+		if ((mask) & msm_dmov_print_mask) \
+			printk(KERN_ERR format, args); \
+	} while (0)
+#define PRINT_ERROR(format, args...) \
+	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
+#define PRINT_IO(format, args...) \
+	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
+#define PRINT_FLOW(format, args...) \
+	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
+
+static int msm_dmov_clk_on(int adm)
+{
+	int ret;
+
+return 0;
+	ret = clk_prepare_enable(dmov_conf[adm].clk);
+	if (ret)
+		return ret;
+	if (dmov_conf[adm].pclk) {
+		ret = clk_prepare_enable(dmov_conf[adm].pclk);
+		if (ret) {
+			clk_disable_unprepare(dmov_conf[adm].clk);
+			return ret;
+		}
+	}
+	if (dmov_conf[adm].ebiclk) {
+		ret = clk_prepare_enable(dmov_conf[adm].ebiclk);
+		if (ret) {
+			if (dmov_conf[adm].pclk)
+				clk_disable_unprepare(dmov_conf[adm].pclk);
+			clk_disable_unprepare(dmov_conf[adm].clk);
+		}
+	}
+	return ret;
+}
+
+static void msm_dmov_clk_off(int adm)
+{
+#if 0
+	if (dmov_conf[adm].ebiclk)
+		clk_disable_unprepare(dmov_conf[adm].ebiclk);
+	if (dmov_conf[adm].pclk)
+		clk_disable_unprepare(dmov_conf[adm].pclk);
+	clk_disable_unprepare(dmov_conf[adm].clk);
+#endif
+}
+
+static void msm_dmov_clock_work(struct work_struct *work)
+{
+	struct msm_dmov_conf *conf =
+		container_of(to_delayed_work(work), struct msm_dmov_conf, work);
+	int adm = DMOV_IRQ_TO_ADM(conf->irq);
+	mutex_lock(&conf->lock);
+	if (conf->clk_ctl == CLK_TO_BE_DIS) {
+		BUG_ON(conf->channel_active);
+		msm_dmov_clk_off(adm);
+		conf->clk_ctl = CLK_DIS;
+	}
+	mutex_unlock(&conf->lock);
+}
+
+enum {
+	NOFLUSH = 0,
+	GRACEFUL,
+	NONGRACEFUL,
+};
+
+/* Caller must hold the list lock */
+static struct msm_dmov_cmd *start_ready_cmd(unsigned ch, int adm)
+{
+	struct msm_dmov_cmd *cmd;
+
+	if (list_empty(&dmov_conf[adm].ready_commands[ch])) {
+		return NULL;
+	}
+
+	cmd = list_entry(dmov_conf[adm].ready_commands[ch].next, typeof(*cmd),
+			 list);
+	list_del(&cmd->list);
+	if (cmd->exec_func)
+		cmd->exec_func(cmd);
+	list_add_tail(&cmd->list, &dmov_conf[adm].active_commands[ch]);
+	if (!dmov_conf[adm].channel_active) {
+		enable_irq(dmov_conf[adm].irq);
+	}
+	dmov_conf[adm].channel_active |= BIT(ch);
+	PRINT_IO("msm dmov enqueue command, %x, ch %d\n", cmd->cmdptr, ch);
+	writel_relaxed(cmd->cmdptr, DMOV_REG(DMOV_CMD_PTR(ch), adm));
+
+	return cmd;
+}
+
+static void msm_dmov_enqueue_cmd_ext_work(struct work_struct *work)
+{
+	struct msm_dmov_cmd *cmd =
+		container_of(work, struct msm_dmov_cmd, work);
+	unsigned id = cmd->id;
+	unsigned status;
+	unsigned long flags;
+	int adm = DMOV_ID_TO_ADM(id);
+	int ch = DMOV_ID_TO_CHAN(id);
+
+	mutex_lock(&dmov_conf[adm].lock);
+	if (dmov_conf[adm].clk_ctl == CLK_DIS) {
+		status = msm_dmov_clk_on(adm);
+		if (status != 0)
+			goto error;
+	}
+	dmov_conf[adm].clk_ctl = CLK_EN;
+
+	spin_lock_irqsave(&dmov_conf[adm].list_lock, flags);
+
+	cmd = list_entry(dmov_conf[adm].staged_commands[ch].next, typeof(*cmd),
+			 list);
+	list_del(&cmd->list);
+	list_add_tail(&cmd->list, &dmov_conf[adm].ready_commands[ch]);
+	status = readl_relaxed(DMOV_REG(DMOV_STATUS(ch), adm));
+	if (status & DMOV_STATUS_CMD_PTR_RDY) {
+		PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n",
+			id, status);
+		cmd = start_ready_cmd(ch, adm);
+		/*
+		 * We added something to the ready list, and still hold the
+		 * list lock. Thus, no need to check for cmd == NULL
+		 */
+		if (cmd->toflush) {
+			int flush = (cmd->toflush == GRACEFUL) ? 1 << 31 : 0;
+			writel_relaxed(flush, DMOV_REG(DMOV_FLUSH0(ch), adm));
+		}
+	} else {
+		cmd->toflush = 0;
+		if (list_empty(&dmov_conf[adm].active_commands[ch]) &&
+		    !list_empty(&dmov_conf[adm].ready_commands[ch]))
+			PRINT_ERROR("msm_dmov_enqueue_cmd_ext(%d), stalled, "
+				"status %x\n", id, status);
+		PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status "
+		    "%x\n", id, status);
+	}
+	if (!dmov_conf[adm].channel_active) {
+		dmov_conf[adm].clk_ctl = CLK_TO_BE_DIS;
+		schedule_delayed_work(&dmov_conf[adm].work, (HZ/10));
+	}
+	spin_unlock_irqrestore(&dmov_conf[adm].list_lock, flags);
+error:
+	mutex_unlock(&dmov_conf[adm].lock);
+}
+
+static void __msm_dmov_enqueue_cmd_ext(unsigned id, struct msm_dmov_cmd *cmd)
+{
+	int adm = DMOV_ID_TO_ADM(id);
+	int ch = DMOV_ID_TO_CHAN(id);
+	unsigned long flags;
+	cmd->id = id;
+	cmd->toflush = 0;
+
+	spin_lock_irqsave(&dmov_conf[adm].list_lock, flags);
+	list_add_tail(&cmd->list, &dmov_conf[adm].staged_commands[ch]);
+	spin_unlock_irqrestore(&dmov_conf[adm].list_lock, flags);
+
+	queue_work(dmov_conf[adm].cmd_wq, &cmd->work);
+}
+
+void msm_dmov_enqueue_cmd_ext(unsigned id, struct msm_dmov_cmd *cmd)
+{
+	INIT_WORK(&cmd->work, msm_dmov_enqueue_cmd_ext_work);
+	__msm_dmov_enqueue_cmd_ext(id, cmd);
+}
+EXPORT_SYMBOL(msm_dmov_enqueue_cmd_ext);
+
+void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
+{
+	/* Disable callback function (for backwards compatibility) */
+	cmd->exec_func = NULL;
+	INIT_WORK(&cmd->work, msm_dmov_enqueue_cmd_ext_work);
+	__msm_dmov_enqueue_cmd_ext(id, cmd);
+}
+EXPORT_SYMBOL(msm_dmov_enqueue_cmd);
+
+void msm_dmov_flush(unsigned int id, int graceful)
+{
+	unsigned long irq_flags;
+	int ch = DMOV_ID_TO_CHAN(id);
+	int adm = DMOV_ID_TO_ADM(id);
+	int flush = graceful ? DMOV_FLUSH_TYPE : 0;
+	struct msm_dmov_cmd *cmd;
+
+	spin_lock_irqsave(&dmov_conf[adm].list_lock, irq_flags);
+	/* XXX not checking if flush cmd sent already */
+	if (!list_empty(&dmov_conf[adm].active_commands[ch])) {
+		PRINT_IO("msm_dmov_flush(%d), send flush cmd\n", id);
+		writel_relaxed(flush, DMOV_REG(DMOV_FLUSH0(ch), adm));
+	}
+	list_for_each_entry(cmd, &dmov_conf[adm].staged_commands[ch], list)
+		cmd->toflush = graceful ? GRACEFUL : NONGRACEFUL;
+	/* spin_unlock_irqrestore has the necessary barrier */
+	spin_unlock_irqrestore(&dmov_conf[adm].list_lock, irq_flags);
+}
+EXPORT_SYMBOL(msm_dmov_flush);
+
+struct msm_dmov_exec_cmdptr_cmd {
+	struct msm_dmov_cmd dmov_cmd;
+	struct completion complete;
+	unsigned id;
+	unsigned int result;
+	struct msm_dmov_errdata err;
+};
+
+static void
+dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
+			       unsigned int result,
+			       struct msm_dmov_errdata *err)
+{
+	struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
+	cmd->result = result;
+	if (result != 0x80000002 && err)
+		memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));
+
+	complete(&cmd->complete);
+}
+
+int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
+{
+	struct msm_dmov_exec_cmdptr_cmd cmd;
+
+	PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);
+
+	cmd.dmov_cmd.cmdptr = cmdptr;
+	cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
+	cmd.dmov_cmd.exec_func = NULL;
+	cmd.id = id;
+	cmd.result = 0;
+	INIT_WORK_ONSTACK(&cmd.dmov_cmd.work, msm_dmov_enqueue_cmd_ext_work);
+	init_completion(&cmd.complete);
+
+	__msm_dmov_enqueue_cmd_ext(id, &cmd.dmov_cmd);
+	wait_for_completion_timeout(&cmd.complete, msecs_to_jiffies(1000));
+
+	if (cmd.result != 0x80000002) {
+		PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
+		PRINT_ERROR("dmov_exec_cmdptr(%d):  flush: %x %x %x %x\n",
+			id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
+		return -EIO;
+	}
+	PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
+	return 0;
+}
+EXPORT_SYMBOL(msm_dmov_exec_cmd);
+
+static void fill_errdata(struct msm_dmov_errdata *errdata, int ch, int adm)
+{
+	errdata->flush[0] = readl_relaxed(DMOV_REG(DMOV_FLUSH0(ch), adm));
+	errdata->flush[1] = readl_relaxed(DMOV_REG(DMOV_FLUSH1(ch), adm));
+	errdata->flush[2] = 0;
+	errdata->flush[3] = readl_relaxed(DMOV_REG(DMOV_FLUSH3(ch), adm));
+	errdata->flush[4] = readl_relaxed(DMOV_REG(DMOV_FLUSH4(ch), adm));
+	errdata->flush[5] = readl_relaxed(DMOV_REG(DMOV_FLUSH5(ch), adm));
+}
+
+static irqreturn_t msm_dmov_isr(int irq, void *dev_id)
+{
+        unsigned int int_status;
+	unsigned int mask;
+	unsigned int id;
+	unsigned int ch;
+	unsigned long irq_flags;
+	unsigned int ch_status;
+	unsigned int ch_result;
+	unsigned int valid = 0;
+	struct msm_dmov_cmd *cmd;
+	int adm = DMOV_IRQ_TO_ADM(irq);
+
+	mutex_lock(&dmov_conf[adm].lock);
+	/* read and clear isr */
+	int_status = readl_relaxed(DMOV_REG(DMOV_ISR, adm));
+	PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
+
+	spin_lock_irqsave(&dmov_conf[adm].list_lock, irq_flags);
+	while (int_status) {
+		mask = int_status & -int_status;
+		ch = fls(mask) - 1;
+		id = DMOV_CHAN_ADM_TO_ID(ch, adm);
+		PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
+		int_status &= ~mask;
+		ch_status = readl_relaxed(DMOV_REG(DMOV_STATUS(ch), adm));
+		if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
+			PRINT_FLOW("msm_datamover_irq_handler id %d, "
+				"result not valid %x\n", id, ch_status);
+			continue;
+		}
+		do {
+			valid = 1;
+			ch_result = readl_relaxed(DMOV_REG(DMOV_RSLT(ch), adm));
+			if (list_empty(&dmov_conf[adm].active_commands[ch])) {
+				PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
+					"with no active command, status %x, result %x\n",
+					id, ch_status, ch_result);
+				cmd = NULL;
+			} else {
+				cmd = list_entry(dmov_conf[adm].
+					active_commands[ch].next, typeof(*cmd),
+					list);
+			}
+			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
+			if (ch_result & DMOV_RSLT_DONE) {
+				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
+					id, ch_status);
+				PRINT_IO("msm_datamover_irq_handler id %d, got result "
+					"for %p, result %x\n", id, cmd, ch_result);
+				if (cmd) {
+					list_del(&cmd->list);
+					cmd->complete_func(cmd, ch_result, NULL);
+				}
+			}
+			if (ch_result & DMOV_RSLT_FLUSH) {
+				struct msm_dmov_errdata errdata;
+
+				fill_errdata(&errdata, ch, adm);
+				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+				PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
+				if (cmd) {
+					list_del(&cmd->list);
+					cmd->complete_func(cmd, ch_result, &errdata);
+				}
+			}
+			if (ch_result & DMOV_RSLT_ERROR) {
+				struct msm_dmov_errdata errdata;
+
+				fill_errdata(&errdata, ch, adm);
+
+				PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+				PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
+				if (cmd) {
+					list_del(&cmd->list);
+					cmd->complete_func(cmd, ch_result, &errdata);
+				}
+				/* this does not seem to work, once we get an error */
+				/* the datamover will no longer accept commands */
+				writel_relaxed(0, DMOV_REG(DMOV_FLUSH0(ch),
+					       adm));
+			}
+			rmb();
+			ch_status = readl_relaxed(DMOV_REG(DMOV_STATUS(ch),
+						  adm));
+			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+			if (ch_status & DMOV_STATUS_CMD_PTR_RDY)
+				start_ready_cmd(ch, adm);
+		} while (ch_status & DMOV_STATUS_RSLT_VALID);
+		if (list_empty(&dmov_conf[adm].active_commands[ch]) &&
+		    list_empty(&dmov_conf[adm].ready_commands[ch]))
+			dmov_conf[adm].channel_active &= ~(1U << ch);
+		PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+	}
+	spin_unlock_irqrestore(&dmov_conf[adm].list_lock, irq_flags);
+
+	if (!dmov_conf[adm].channel_active && valid) {
+		disable_irq_nosync(dmov_conf[adm].irq);
+		dmov_conf[adm].clk_ctl = CLK_TO_BE_DIS;
+		schedule_delayed_work(&dmov_conf[adm].work, (HZ/10));
+	}
+
+	mutex_unlock(&dmov_conf[adm].lock);
+
+	return valid ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int msm_dmov_suspend_late(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	int adm = (pdev->id >= 0) ? pdev->id : 0;
+	mutex_lock(&dmov_conf[adm].lock);
+	if (dmov_conf[adm].clk_ctl == CLK_TO_BE_DIS) {
+		BUG_ON(dmov_conf[adm].channel_active);
+		msm_dmov_clk_off(adm);
+		dmov_conf[adm].clk_ctl = CLK_DIS;
+	}
+	mutex_unlock(&dmov_conf[adm].lock);
+	return 0;
+}
+
+static int msm_dmov_runtime_suspend(struct device *dev)
+{
+	dev_dbg(dev, "pm_runtime: suspending...\n");
+	return 0;
+}
+
+static int msm_dmov_runtime_resume(struct device *dev)
+{
+	dev_dbg(dev, "pm_runtime: resuming...\n");
+	return 0;
+}
+
+static int msm_dmov_runtime_idle(struct device *dev)
+{
+	dev_dbg(dev, "pm_runtime: idling...\n");
+	return 0;
+}
+
+static struct dev_pm_ops msm_dmov_dev_pm_ops = {
+	.runtime_suspend = msm_dmov_runtime_suspend,
+	.runtime_resume = msm_dmov_runtime_resume,
+	.runtime_idle = msm_dmov_runtime_idle,
+	.suspend = msm_dmov_suspend_late,
+};
+
+static int msm_dmov_init_clocks(struct platform_device *pdev)
+{
+	int adm = (pdev->id >= 0) ? pdev->id : 0;
+	int ret;
+
+	dmov_conf[adm].clk = devm_clk_get(&pdev->dev, "core_clk");
+	if (IS_ERR(dmov_conf[adm].clk)) {
+		printk(KERN_ERR "%s: Error getting adm_clk\n", __func__);
+		dmov_conf[adm].clk = NULL;
+		return -ENOENT;
+	}
+
+	dmov_conf[adm].pclk = devm_clk_get(&pdev->dev, "iface_clk");
+	if (IS_ERR(dmov_conf[adm].pclk)) {
+		dmov_conf[adm].pclk = NULL;
+		/* pclk not present on all SoCs, don't bail on failure */
+	}
+
+	dmov_conf[adm].ebiclk = devm_clk_get(&pdev->dev, "mem_clk");
+	if (IS_ERR(dmov_conf[adm].ebiclk)) {
+		dmov_conf[adm].ebiclk = NULL;
+		/* ebiclk not present on all SoCs, don't bail on failure */
+	} else {
+		ret = clk_set_rate(dmov_conf[adm].ebiclk, 27000000);
+		if (ret)
+			return -ENOENT;
+	}
+
+	return 0;
+}
+
+static void config_datamover(int adm)
+{
+	int i;
+
+	/* Reset the ADM */
+	reset_control_assert(dmov_conf[adm].adm_reset);
+	reset_control_assert(dmov_conf[adm].c0_reset);
+	reset_control_assert(dmov_conf[adm].c1_reset);
+	reset_control_assert(dmov_conf[adm].c2_reset);
+
+	reset_control_deassert(dmov_conf[adm].c2_reset);
+	reset_control_deassert(dmov_conf[adm].c1_reset);
+	reset_control_deassert(dmov_conf[adm].c0_reset);
+	reset_control_deassert(dmov_conf[adm].adm_reset);
+
+	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
+		struct msm_dmov_chan_conf *chan_conf =
+			dmov_conf[adm].chan_conf;
+		unsigned conf;
+		/* Only configure scorpion channels */
+		if (chan_conf[i].sd <= 1) {
+			conf = readl_relaxed(DMOV_REG(DMOV_CONF(i), adm));
+			conf |= DMOV_CONF_MPU_DISABLE |
+				DMOV_CONF_PERM_MPU_CONF |
+				DMOV_CONF_FLUSH_RSLT_EN |
+				DMOV_CONF_FORCE_RSLT_EN |
+				DMOV_CONF_IRQ_EN |
+				DMOV_CONF_PRIORITY(chan_conf[i].priority);
+
+			conf &= ~DMOV_CONF_SD(7);
+			conf |= DMOV_CONF_SD(chan_conf[i].sd);
+			writel_relaxed(conf, DMOV_REG(DMOV_CONF(i), adm));
+		}
+	}
+
+	for (i = 0; i < MSM_DMOV_CRCI_COUNT; i++) {
+		writel_relaxed(DMOV_CRCI_CTL_RST,
+		       DMOV_REG(DMOV_CRCI_CTL(i), adm));
+	}
+
+	/* NAND CRCI Enable */
+	writel_relaxed(0, DMOV_REG(DMOV_CRCI_CTL(DMOV_NAND_CRCI_DATA), adm));
+	writel_relaxed(0, DMOV_REG(DMOV_CRCI_CTL(DMOV_NAND_CRCI_CMD), adm));
+
+	/* GSBI5 CRCI Enable */
+	writel_relaxed(0, DMOV_REG(DMOV_CRCI_CTL(DMOV_SPI_GSBI5_RX_CRCI), adm));
+	writel_relaxed(0, DMOV_REG(DMOV_CRCI_CTL(DMOV_SPI_GSBI5_TX_CRCI), adm));
+
+	writel_relaxed(DMOV_CI_CONF_RANGE_START(0x40) |	/* EBI1 */
+			DMOV_CI_CONF_RANGE_END(0xb0) |
+			DMOV_CI_CONF_MAX_BURST(0x8),
+		       DMOV_REG(DMOV_CI_CONF(0), adm));
+
+	writel_relaxed(DMOV_CI_CONF_RANGE_START(0x2a) |	/* IMEM */
+			DMOV_CI_CONF_RANGE_END(0x2c) |
+			DMOV_CI_CONF_MAX_BURST(0x8),
+		       DMOV_REG(DMOV_CI_CONF(1), adm));
+
+	writel_relaxed(DMOV_CI_CONF_RANGE_START(0x12) |	/* CPSS/SPS */
+			DMOV_CI_CONF_RANGE_END(0x28) |
+			DMOV_CI_CONF_MAX_BURST(0x8),
+		       DMOV_REG(DMOV_CI_CONF(2), adm));
+
+	writel_relaxed(DMOV_HI_GP_CTL_CORE_CLK_LP_EN | /* will disable LP */
+			DMOV_HI_GP_CTL_LP_CNT(0xf),
+		       DMOV_REG(DMOV_HI_GP_CTL, adm));
+
+}
+
+static int msm_dmov_probe(struct platform_device *pdev)
+{
+	
+        int adm = (pdev->id >= 0) ? pdev->id : 0;
+	int i;
+	int ret;
+	struct resource *irqres =
+		platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	struct resource *mres =
+		platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        dmov_conf[adm].sd=0;
+        dmov_conf[adm].sd_size=0x800;
+	   
+	dmov_conf[adm].irq = irqres->start;
+
+	dmov_conf[adm].base = devm_ioremap_resource(&pdev->dev, mres);
+	if (!dmov_conf[adm].base)
+		return -ENOMEM;
+
+	dmov_conf[adm].cmd_wq = alloc_ordered_workqueue("dmov%d_wq", 0, adm);
+	if (!dmov_conf[adm].cmd_wq) {
+		PRINT_ERROR("Couldn't allocate ADM%d workqueue.\n", adm);
+		return -ENOMEM;
+	}
+
+	/* get resets */
+	dmov_conf[adm].adm_reset = devm_reset_control_get(&pdev->dev, "adm");
+	if (IS_ERR(dmov_conf[adm].adm_reset)) {
+		dev_err(&pdev->dev, "failed to get adm reset\n");
+		ret = PTR_ERR(dmov_conf[adm].adm_reset);
+		goto out_wq;
+	}
+
+	dmov_conf[adm].pbus_reset = devm_reset_control_get(&pdev->dev, "pbus");
+	if (IS_ERR(dmov_conf[adm].pbus_reset)) {
+		dev_err(&pdev->dev, "failed to get pbus reset\n");
+		ret = PTR_ERR(dmov_conf[adm].pbus_reset);
+		goto out_wq;
+	}
+
+	dmov_conf[adm].c0_reset = devm_reset_control_get(&pdev->dev, "c0");
+	if (IS_ERR(dmov_conf[adm].c0_reset)) {
+		dev_err(&pdev->dev, "failed to get c0 reset\n");
+		ret = PTR_ERR(dmov_conf[adm].c0_reset);
+		goto out_wq;
+	}
+
+	dmov_conf[adm].c1_reset = devm_reset_control_get(&pdev->dev, "c1");
+	if (IS_ERR(dmov_conf[adm].c1_reset)) {
+		dev_err(&pdev->dev, "failed to get c1 reset\n");
+		ret = PTR_ERR(dmov_conf[adm].c1_reset);
+		goto out_wq;
+	}
+
+	dmov_conf[adm].c2_reset = devm_reset_control_get(&pdev->dev, "c2");
+	if (IS_ERR(dmov_conf[adm].c2_reset)) {
+		dev_err(&pdev->dev, "failed to get c2 reset\n");
+		ret = PTR_ERR(dmov_conf[adm].c2_reset);
+		goto out_wq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, dmov_conf[adm].irq, NULL,
+		msm_dmov_isr, IRQF_ONESHOT, "msmdatamover", NULL);
+
+	if (ret) {
+		PRINT_ERROR("Requesting ADM%d irq %d failed\n", adm,
+			dmov_conf[adm].irq);
+		goto out_wq;
+	}
+
+	disable_irq(dmov_conf[adm].irq);
+	ret = msm_dmov_init_clocks(pdev);
+	if (ret) {
+		PRINT_ERROR("Requesting ADM%d clocks failed\n", adm);
+		goto out_wq;
+	}
+	clk_prepare_enable(dmov_conf[adm].clk);
+	clk_prepare_enable(dmov_conf[adm].pclk);
+
+//	ret = msm_dmov_clk_on(adm);
+//	if (ret) {
+//		PRINT_ERROR("Enabling ADM%d clocks failed\n", adm);
+//		goto out_wq;
+//	}
+
+	config_datamover(adm);
+	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
+		INIT_LIST_HEAD(&dmov_conf[adm].staged_commands[i]);
+		INIT_LIST_HEAD(&dmov_conf[adm].ready_commands[i]);
+		INIT_LIST_HEAD(&dmov_conf[adm].active_commands[i]);
+
+		writel_relaxed(DMOV_RSLT_CONF_IRQ_EN
+		     | DMOV_RSLT_CONF_FORCE_FLUSH_RSLT,
+		     DMOV_REG(DMOV_RSLT_CONF(i), adm));
+	}
+	wmb();
+//	msm_dmov_clk_off(adm);
+	return ret;
+out_wq:
+	destroy_workqueue(dmov_conf[adm].cmd_wq);
+	return ret;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id adm_of_match[] = {
+        { .compatible = "qcom,adm", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, adm_of_match);
+#endif
+
+static struct platform_driver msm_dmov_driver = {
+	.probe = msm_dmov_probe,
+	.driver = {
+		.name = MODULE_NAME,
+		.owner = THIS_MODULE,
+                .of_match_table = adm_of_match,
+		.pm = &msm_dmov_dev_pm_ops,
+	},
+};
+
+/* static int __init */
+static int __init msm_init_datamover(void)
+{
+	int ret;
+	ret = platform_driver_register(&msm_dmov_driver);
+	if (ret)
+		return ret;
+	return 0;
+}
+arch_initcall(msm_init_datamover);
--- /dev/null
+++ b/drivers/mtd/nand/qcom_adm_dma.h
@@ -0,0 +1,268 @@
+/* * Copyright (c) 2012 The Linux Foundation. All rights reserved.* */
+/* linux/include/asm-arm/arch-msm/dma.h
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2008-2012, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __ASM_ARCH_MSM_DMA_H
+#define __ASM_ARCH_MSM_DMA_H
+#include <linux/list.h>
+
+struct msm_dmov_errdata {
+	uint32_t flush[6];
+};
+
+struct msm_dmov_cmd {
+	struct list_head list;
+	unsigned int cmdptr;
+	void (*complete_func)(struct msm_dmov_cmd *cmd,
+			      unsigned int result,
+			      struct msm_dmov_errdata *err);
+	void (*exec_func)(struct msm_dmov_cmd *cmd);
+	struct work_struct work;
+	unsigned id;    /* For internal use */
+	void *user;	/* Pointer for caller's reference */
+	u8 toflush;
+};
+
+struct msm_dmov_pdata {
+	int sd;
+	size_t sd_size;
+};
+
+void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);
+void msm_dmov_enqueue_cmd_ext(unsigned id, struct msm_dmov_cmd *cmd);
+void msm_dmov_flush(unsigned int id, int graceful);
+int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);
+
+#define DMOV_CRCIS_PER_CONF 10
+
+#define DMOV_ADDR(off, ch) ((off) + ((ch) << 2))
+
+#define DMOV_CMD_PTR(ch)      DMOV_ADDR(0x000, ch)
+#define DMOV_CMD_LIST         (0 << 29) /* does not work */
+#define DMOV_CMD_PTR_LIST     (1 << 29) /* works */
+#define DMOV_CMD_INPUT_CFG    (2 << 29) /* untested */
+#define DMOV_CMD_OUTPUT_CFG   (3 << 29) /* untested */
+#define DMOV_CMD_ADDR(addr)   ((addr) >> 3)
+
+#define DMOV_RSLT(ch)         DMOV_ADDR(0x040, ch)
+#define DMOV_RSLT_VALID       (1 << 31) /* 0 == host has empties result fifo */
+#define DMOV_RSLT_ERROR       (1 << 3)
+#define DMOV_RSLT_FLUSH       (1 << 2)
+#define DMOV_RSLT_DONE        (1 << 1)  /* top pointer done */
+#define DMOV_RSLT_USER        (1 << 0)  /* command with FR force result */
+
+#define DMOV_FLUSH0(ch)       DMOV_ADDR(0x080, ch)
+#define DMOV_FLUSH1(ch)       DMOV_ADDR(0x0C0, ch)
+#define DMOV_FLUSH2(ch)       DMOV_ADDR(0x100, ch)
+#define DMOV_FLUSH3(ch)       DMOV_ADDR(0x140, ch)
+#define DMOV_FLUSH4(ch)       DMOV_ADDR(0x180, ch)
+#define DMOV_FLUSH5(ch)       DMOV_ADDR(0x1C0, ch)
+#define DMOV_FLUSH_TYPE       (1 << 31)
+
+#define DMOV_STATUS(ch)       DMOV_ADDR(0x200, ch)
+#define DMOV_STATUS_RSLT_COUNT(n)    (((n) >> 29))
+#define DMOV_STATUS_CMD_COUNT(n)     (((n) >> 27) & 3)
+#define DMOV_STATUS_RSLT_VALID       (1 << 1)
+#define DMOV_STATUS_CMD_PTR_RDY      (1 << 0)
+
+#define DMOV_CONF(ch)         DMOV_ADDR(0x240, ch)
+#define DMOV_CONF_SD(sd)		(((sd & 4) << 11) | ((sd & 3) << 4))
+#define DMOV_CONF_OTHER_CH_BLK_MASK(m)	((m << 0x10) & 0xffff0000)
+#define DMOV_CONF_SHADOW_EN		(1 << 12)
+#define DMOV_CONF_MPU_DISABLE		(1 << 11)
+#define DMOV_CONF_PERM_MPU_CONF		(1 << 9)
+#define DMOV_CONF_FLUSH_RSLT_EN		(1 << 8)
+#define DMOV_CONF_IRQ_EN		(1 << 6)
+#define DMOV_CONF_FORCE_RSLT_EN		(1 << 7)
+#define DMOV_CONF_PRIORITY(n)		(n << 0)
+
+#define DMOV_DBG_ERR(ci)      DMOV_ADDR(0x280, ci)
+
+#define DMOV_RSLT_CONF(ch)    DMOV_ADDR(0x300, ch)
+#define DMOV_RSLT_CONF_FORCE_TOP_PTR_RSLT (1 << 2)
+#define DMOV_RSLT_CONF_FORCE_FLUSH_RSLT   (1 << 1)
+#define DMOV_RSLT_CONF_IRQ_EN             (1 << 0)
+
+#define DMOV_ISR              DMOV_ADDR(0x380, 0)
+
+#define DMOV_CI_CONF(ci)      DMOV_ADDR(0x390, ci)
+#define DMOV_CI_CONF_RANGE_END(n)      ((n) << 24)
+#define DMOV_CI_CONF_RANGE_START(n)    ((n) << 16)
+#define DMOV_CI_CONF_MAX_BURST(n)      ((n) << 0)
+
+#define DMOV_CI_DBG_ERR(ci)   DMOV_ADDR(0x3B0, ci)
+
+#define DMOV_CRCI_CONF0       DMOV_ADDR(0x3D0, 0)
+#define DMOV_CRCI_CONF0_CRCI9_SD	(2 << 0x1b)
+
+#define DMOV_CRCI_CONF1       DMOV_ADDR(0x3D4, 0)
+#define DMOV_CRCI_CONF0_SD(crci, sd) (sd << (crci*3))
+#define DMOV_CRCI_CONF1_SD(crci, sd) (sd << ((crci-DMOV_CRCIS_PER_CONF)*3))
+
+#define DMOV_HI_GP_CTL			DMOV_ADDR(0x3D8, 0)
+#define DMOV_HI_GP_CTL_CORE_CLK_LP_EN	(1 << 12)
+#define DMOV_HI_GP_CTL_LP_CNT(x)	(((x) & 0xf) << 8)
+#define DMOV_HI_GP_CTL_CI3_CLK_LP_EN	(1 << 7)
+#define DMOV_HI_GP_CTL_CI2_CLK_LP_EN	(1 << 6)
+#define DMOV_HI_GP_CTL_CI1_CLK_LP_EN	(1 << 5)
+#define DMOV_HI_GP_CTL_CI0_CLK_LP_EN	(1 << 4)
+
+#define DMOV_CRCI_CTL(crci)   DMOV_ADDR(0x400, crci)
+#define DMOV_CRCI_CTL_BLK_SZ(n)        ((n) << 0)
+#define DMOV_CRCI_CTL_RST              (1 << 17)
+#define DMOV_CRCI_MUX                  (1 << 18)
+
+/* channel assignments */
+
+/*
+ * Format of CRCI numbers: crci number + (muxsel << 4)
+ */
+
+#define DMOV_GP_CHAN           9
+
+#define DMOV_CE_IN_CHAN        0
+#define DMOV_CE_IN_CRCI        2
+
+#define DMOV_CE_OUT_CHAN       1
+#define DMOV_CE_OUT_CRCI       3
+
+#define DMOV_TSIF_CHAN         2
+#define DMOV_TSIF_CRCI         11
+
+#define DMOV_HSUART_GSBI6_TX_CHAN	7
+#define DMOV_HSUART_GSBI6_TX_CRCI	6
+
+#define DMOV_HSUART_GSBI6_RX_CHAN	8
+#define DMOV_HSUART_GSBI6_RX_CRCI	11
+
+#define DMOV_HSUART_GSBI8_TX_CHAN	7
+#define DMOV_HSUART_GSBI8_TX_CRCI	10
+
+#define DMOV_HSUART_GSBI8_RX_CHAN	8
+#define DMOV_HSUART_GSBI8_RX_CRCI	9
+
+#define DMOV_HSUART_GSBI9_TX_CHAN	4
+#define DMOV_HSUART_GSBI9_TX_CRCI	13
+
+#define DMOV_HSUART_GSBI9_RX_CHAN	3
+#define DMOV_HSUART_GSBI9_RX_CRCI	12
+
+#define DMOV_NAND_CHAN			3
+#define DMOV_NAND_CRCI_CMD		15
+#define DMOV_NAND_CRCI_DATA		3
+
+#define DMOV_SPI_GSBI5_RX_CRCI		9
+#define DMOV_SPI_GSBI5_TX_CRCI		10
+#define DMOV_SPI_GSBI5_RX_CHAN		6
+#define DMOV_SPI_GSBI5_TX_CHAN		5
+
+/* channels for APQ8064 */
+#define DMOV8064_CE_IN_CHAN        0
+#define DMOV8064_CE_IN_CRCI       14
+
+#define DMOV8064_CE_OUT_CHAN       1
+#define DMOV8064_CE_OUT_CRCI       15
+
+#define DMOV8064_TSIF_CHAN         2
+#define DMOV8064_TSIF_CRCI         1
+
+/* channels for APQ8064 SGLTE*/
+#define DMOV_APQ8064_HSUART_GSBI4_TX_CHAN	11
+#define DMOV_APQ8064_HSUART_GSBI4_TX_CRCI	8
+
+#define DMOV_APQ8064_HSUART_GSBI4_RX_CHAN	10
+#define DMOV_APQ8064_HSUART_GSBI4_RX_CRCI	7
+
+/* channels for MPQ8064 */
+#define DMOV_MPQ8064_HSUART_GSBI6_TX_CHAN	7
+#define DMOV_MPQ8064_HSUART_GSBI6_TX_CRCI	6
+
+#define DMOV_MPQ8064_HSUART_GSBI6_RX_CHAN	6
+#define DMOV_MPQ8064_HSUART_GSBI6_RX_CRCI	11
+
+#define DMOV_IPQ806X_HSUART_GSBI6_TX_CHAN	DMOV_MPQ8064_HSUART_GSBI6_TX_CHAN
+#define DMOV_IPQ806X_HSUART_GSBI6_TX_CRCI	DMOV_MPQ8064_HSUART_GSBI6_TX_CRCI
+
+#define DMOV_IPQ806X_HSUART_GSBI6_RX_CHAN	DMOV_MPQ8064_HSUART_GSBI6_RX_CHAN
+#define DMOV_IPQ806X_HSUART_GSBI6_RX_CRCI	DMOV_MPQ8064_HSUART_GSBI6_RX_CRCI
+
+/* no client rate control ifc (eg, ram) */
+#define DMOV_NONE_CRCI        0
+
+
+/* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
+ * is going to walk a list of 32bit pointers as described below.  Each
+ * pointer points to a *array* of dmov_s, etc structs.  The last pointer
+ * in the list is marked with CMD_PTR_LP.  The last struct in each array
+ * is marked with CMD_LC (see below).
+ */
+#define CMD_PTR_ADDR(addr)  ((addr) >> 3)
+#define CMD_PTR_LP          (1 << 31) /* last pointer */
+#define CMD_PTR_PT          (3 << 29) /* ? */
+
+/* Single Item Mode */
+typedef struct {
+	unsigned cmd;
+	unsigned src;
+	unsigned dst;
+	unsigned len;
+} dmov_s;
+
+/* Scatter/Gather Mode */
+typedef struct {
+	unsigned cmd;
+	unsigned src_dscr;
+	unsigned dst_dscr;
+	unsigned _reserved;
+} dmov_sg;
+
+/* Box mode */
+typedef struct {
+	uint32_t cmd;
+	uint32_t src_row_addr;
+	uint32_t dst_row_addr;
+	uint32_t src_dst_len;
+	uint32_t num_rows;
+	uint32_t row_offset;
+} dmov_box;
+
+/* bits for the cmd field of the above structures */
+
+#define CMD_LC      (1 << 31)  /* last command */
+#define CMD_FR      (1 << 22)  /* force result -- does not work? */
+#define CMD_OCU     (1 << 21)  /* other channel unblock */
+#define CMD_OCB     (1 << 20)  /* other channel block */
+#define CMD_TCB     (1 << 19)  /* ? */
+#define CMD_DAH     (1 << 18)  /* destination address hold -- does not work?*/
+#define CMD_SAH     (1 << 17)  /* source address hold -- does not work? */
+
+#define CMD_MODE_SINGLE     (0 << 0) /* dmov_s structure used */
+#define CMD_MODE_SG         (1 << 0) /* untested */
+#define CMD_MODE_IND_SG     (2 << 0) /* untested */
+#define CMD_MODE_BOX        (3 << 0) /* untested */
+
+#define CMD_DST_SWAP_BYTES  (1 << 14) /* exchange each byte n with byte n+1 */
+#define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
+#define CMD_DST_SWAP_WORDS  (1 << 16) /* exchange each word n with word n+1 */
+
+#define CMD_SRC_SWAP_BYTES  (1 << 11) /* exchange each byte n with byte n+1 */
+#define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
+#define CMD_SRC_SWAP_WORDS  (1 << 13) /* exchange each word n with word n+1 */
+
+#define CMD_DST_CRCI(n)     (((n) & 15) << 7)
+#define CMD_SRC_CRCI(n)     (((n) & 15) << 3)
+
+#endif
--- /dev/null
+++ b/drivers/mtd/nand/qcom_nand.c
@@ -0,0 +1,7455 @@
+/*
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2008-2012, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/crc16.h>
+#include <linux/bitrev.h>
+#include <linux/clk.h>
+
+#include <asm/dma.h>
+#include <asm/mach/flash.h>
+
+#include "qcom_adm_dma.h"
+
+#include "qcom_nand.h"
+unsigned long msm_nand_phys = 0;
+unsigned long msm_nandc01_phys = 0;
+unsigned long msm_nandc10_phys = 0;
+unsigned long msm_nandc11_phys = 0;
+unsigned long ebi2_register_base = 0;
+static uint32_t dual_nand_ctlr_present;
+static uint32_t interleave_enable;
+static uint32_t enable_bch_ecc;
+static uint32_t boot_layout;
+
+
+#define MSM_NAND_DMA_BUFFER_SIZE SZ_8K
+#define MSM_NAND_DMA_BUFFER_SLOTS \
+	(MSM_NAND_DMA_BUFFER_SIZE / (sizeof(((atomic_t *)0)->counter) * 8))
+
+#define MSM_NAND_CFG0_RAW_ONFI_IDENTIFIER 0x88000800
+#define MSM_NAND_CFG0_RAW_ONFI_PARAM_INFO 0x88040000
+#define MSM_NAND_CFG1_RAW_ONFI_IDENTIFIER 0x0005045d
+#define MSM_NAND_CFG1_RAW_ONFI_PARAM_INFO 0x0005045d
+
+#define ONFI_IDENTIFIER_LENGTH 0x0004
+#define ONFI_PARAM_INFO_LENGTH 0x0200
+#define ONFI_PARAM_PAGE_LENGTH 0x0100
+
+#define ONFI_PARAMETER_PAGE_SIGNATURE 0x49464E4F
+
+#define FLASH_READ_ONFI_IDENTIFIER_COMMAND 0x90
+#define FLASH_READ_ONFI_IDENTIFIER_ADDRESS 0x20
+#define FLASH_READ_ONFI_PARAMETERS_COMMAND 0xEC
+#define FLASH_READ_ONFI_PARAMETERS_ADDRESS 0x00
+
+#define UD_SIZE_BYTES_MASK	(0x3FF << 9)
+#define SPARE_SIZE_BYTES_MASK	(0xF << 23)
+#define ECC_NUM_DATA_BYTES_MASK	(0x3FF << 16)
+
+#define VERBOSE 0
+
+struct msm_nand_chip {
+	struct device *dev;
+	wait_queue_head_t wait_queue;
+	atomic_t dma_buffer_busy;
+	unsigned dma_channel;
+	uint8_t *dma_buffer;
+	dma_addr_t dma_addr;
+	unsigned CFG0, CFG1, CFG0_RAW, CFG1_RAW;
+	uint32_t ecc_buf_cfg;
+	uint32_t ecc_bch_cfg;
+	uint32_t ecc_parity_bytes;
+	unsigned cw_size;
+	unsigned int uncorrectable_bit_mask;
+	unsigned int num_err_mask;
+};
+
+#define CFG1_WIDE_FLASH (1U << 1)
+
+/* TODO: move datamover code out */
+
+#define SRC_CRCI_NAND_CMD  CMD_SRC_CRCI(DMOV_NAND_CRCI_CMD)
+#define DST_CRCI_NAND_CMD  CMD_DST_CRCI(DMOV_NAND_CRCI_CMD)
+#define SRC_CRCI_NAND_DATA CMD_SRC_CRCI(DMOV_NAND_CRCI_DATA)
+#define DST_CRCI_NAND_DATA CMD_DST_CRCI(DMOV_NAND_CRCI_DATA)
+
+#define msm_virt_to_dma(chip, vaddr) \
+	((chip)->dma_addr + \
+	 ((uint8_t *)(vaddr) - (chip)->dma_buffer))
+
+/**
+ * msm_nand_oob_64 - oob info for 2KB page
+ */
+static struct nand_ecclayout msm_nand_oob_64 = {
+	.eccbytes	= 40,
+	.eccpos		= {
+		0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
+		10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+		20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+		46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
+		},
+	.oobavail	= 16,
+	.oobfree	= {
+		{30, 16},
+	}
+};
+
+/**
+ * msm_nand_oob_128 - oob info for 4KB page
+ */
+static struct nand_ecclayout msm_nand_oob_128 = {
+	.eccbytes	= 80,
+	.eccpos		= {
+		  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,
+		 10,  11,  12,  13,  14,  15,  16,  17,  18,  19,
+		 20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
+		 30,  31,  32,  33,  34,  35,  36,  37,  38,  39,
+		 40,  41,  42,  43,  44,  45,  46,  47,  48,  49,
+		 50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
+		 60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
+		102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
+		},
+	.oobavail	= 32,
+	.oobfree	= {
+		{70, 32},
+	}
+};
+
+/**
+ * msm_nand_oob_224 - oob info for 4KB page 8Bit interface
+ */
+static struct nand_ecclayout msm_nand_oob_224_x8 = {
+	.eccbytes	= 104,
+	.eccpos		= {
+		  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,
+		 13,  14,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,
+		 26,  27,  28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,
+		 39,  40,  41,  42,  43,  44,  45,  46,  47,  48,  49,  50,  51,
+		 52,  53,  54,  55,  56,  57,  58,  59,	 60,  61,  62,  63,  64,
+		 65,  66,  67,  68,  69,  70,  71,  72,  73,  74,  75,  76,  77,
+		 78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,  90,
+		123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135,
+		},
+	.oobavail	= 32,
+	.oobfree	= {
+		{91, 32},
+	}
+};
+
+/**
+ * msm_nand_oob_224 - oob info for 4KB page 16Bit interface
+ */
+static struct nand_ecclayout msm_nand_oob_224_x16 = {
+	.eccbytes	= 112,
+	.eccpos		= {
+	  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,
+	 14,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,
+	 28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,
+	 42,  43,  44,  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,
+	 56,  57,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
+	 70,  71,  72,  73,  74,  75,  76,  77,  78,  79,  80,  81,  82,  83,
+	 84,  85,  86,  87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,
+	130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
+	},
+	.oobavail	= 32,
+	.oobfree	= {
+		{98, 32},
+	}
+};
+
+/**
+ * msm_nand_oob_256 - oob info for 8KB page
+ */
+static struct nand_ecclayout msm_nand_oob_256 = {
+	.eccbytes 	= 160,
+	.eccpos 	= {
+		  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,
+		 10,  11,  12,  13,  14,  15,  16,  17,  18,  19,
+		 20,  21,  22,  23,  24,  25,  26,  27,  28,  29,
+		 30,  31,  32,  33,  34,  35,  36,  37,  38,  39,
+		 40,  41,  42,  43,  44,  45,  46,  47,  48,  49,
+		 50,  51,  52,  53,  54,  55,  56,  57,  58,  59,
+		 60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
+		 70,  71,  72,  73,  74,  75,  76,  77,  78,  79,
+		 80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
+		 90,  91,  92,  93,  94,  96,  97,  98 , 99, 100,
+		101, 102, 103, 104, 105, 106, 107, 108, 109, 110,
+		111, 112, 113, 114, 115, 116, 117, 118, 119, 120,
+		121, 122, 123, 124, 125, 126, 127, 128, 129, 130,
+		131, 132, 133, 134, 135, 136, 137, 138, 139, 140,
+		141, 142, 143, 144, 145, 146, 147, 148, 149, 150,
+		215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
+		},
+	.oobavail	= 64,
+	.oobfree	= {
+		{151, 64},
+	}
+};
+
+/**
+ * msm_onenand_oob_64 - oob info for large (2KB) page
+ */
+static struct nand_ecclayout msm_onenand_oob_64 = {
+	.eccbytes	= 20,
+	.eccpos		= {
+		8, 9, 10, 11, 12,
+		24, 25, 26, 27, 28,
+		40, 41, 42, 43, 44,
+		56, 57, 58, 59, 60,
+		},
+	.oobavail	= 20,
+	.oobfree	= {
+		{2, 3}, {14, 2}, {18, 3}, {30, 2},
+		{34, 3}, {46, 2}, {50, 3}, {62, 2}
+	}
+};
+
+static void *msm_nand_get_dma_buffer(struct msm_nand_chip *chip, size_t size)
+{
+	unsigned int bitmask, free_bitmask, old_bitmask;
+	unsigned int need_mask, current_need_mask;
+	int free_index;
+
+	need_mask = (1UL << DIV_ROUND_UP(size, MSM_NAND_DMA_BUFFER_SLOTS)) - 1;
+	bitmask = atomic_read(&chip->dma_buffer_busy);
+	free_bitmask = ~bitmask;
+	while (free_bitmask) {
+		free_index = __ffs(free_bitmask);
+		current_need_mask = need_mask << free_index;
+
+		if (size + free_index * MSM_NAND_DMA_BUFFER_SLOTS >=
+						 MSM_NAND_DMA_BUFFER_SIZE)
+			return NULL;
+
+		if ((bitmask & current_need_mask) == 0) {
+			old_bitmask =
+				atomic_cmpxchg(&chip->dma_buffer_busy,
+					       bitmask,
+					       bitmask | current_need_mask);
+			if (old_bitmask == bitmask)
+				return chip->dma_buffer +
+					free_index * MSM_NAND_DMA_BUFFER_SLOTS;
+			free_bitmask = 0; /* force return */
+		}
+		/* current free range was too small, clear all free bits */
+		/* below the top busy bit within current_need_mask */
+		free_bitmask &=
+			~(~0U >> (32 - fls(bitmask & current_need_mask)));
+	}
+
+	return NULL;
+}
+
+static void msm_nand_release_dma_buffer(struct msm_nand_chip *chip,
+					void *buffer, size_t size)
+{
+	int index;
+	unsigned int used_mask;
+
+	used_mask = (1UL << DIV_ROUND_UP(size, MSM_NAND_DMA_BUFFER_SLOTS)) - 1;
+	index = ((uint8_t *)buffer - chip->dma_buffer) /
+		MSM_NAND_DMA_BUFFER_SLOTS;
+	atomic_sub(used_mask << index, &chip->dma_buffer_busy);
+
+	wake_up(&chip->wait_queue);
+}
+
+
+unsigned flash_rd_reg(struct msm_nand_chip *chip, unsigned addr)
+{
+	struct {
+		dmov_s cmd;
+		unsigned cmdptr;
+		unsigned data;
+	} *dma_buffer;
+	unsigned rv;
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	dma_buffer->cmd.cmd = CMD_LC | CMD_OCB | CMD_OCU;
+	dma_buffer->cmd.src = addr;
+	dma_buffer->cmd.dst = msm_virt_to_dma(chip, &dma_buffer->data);
+	dma_buffer->cmd.len = 4;
+
+	dma_buffer->cmdptr =
+		(msm_virt_to_dma(chip, &dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+	dma_buffer->data = 0xeeeeeeee;
+
+	mb();
+	msm_dmov_exec_cmd(
+		chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	rv = dma_buffer->data;
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	return rv;
+}
+
+void flash_wr_reg(struct msm_nand_chip *chip, unsigned addr, unsigned val)
+{
+	struct {
+		dmov_s cmd;
+		unsigned cmdptr;
+		unsigned data;
+	} *dma_buffer;
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	dma_buffer->cmd.cmd = CMD_LC | CMD_OCB | CMD_OCU;
+	dma_buffer->cmd.src = msm_virt_to_dma(chip, &dma_buffer->data);
+	dma_buffer->cmd.dst = addr;
+	dma_buffer->cmd.len = 4;
+
+	dma_buffer->cmdptr =
+		(msm_virt_to_dma(chip, &dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+	dma_buffer->data = val;
+
+	mb();
+	msm_dmov_exec_cmd(
+		chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+}
+
+/*
+ * Allocates a bounce buffer, and stores the buffer address in
+ * variable pointed to by bounce_buf. bounce_buf should point to a
+ * stack variable, to avoid SMP issues.
+ */
+static int msm_nand_alloc_bounce(void *addr, size_t size,
+				 enum dma_data_direction dir,
+				 uint8_t **bounce_buf)
+{
+	if (bounce_buf == NULL) {
+		printk(KERN_ERR "not allocating bounce buffer\n");
+		return -EINVAL;
+	}
+
+	*bounce_buf = kmalloc(size, GFP_KERNEL | GFP_NOFS | GFP_DMA);
+	if (*bounce_buf == NULL) {
+		printk(KERN_ERR "error alloc bounce buffer %zu\n", size);
+		return -ENOMEM;
+	}
+
+	if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
+		memcpy(*bounce_buf, addr, size);
+
+	return 0;
+}
+
+/*
+ * Maps the user buffer for DMA. If the buffer is vmalloced and the
+ * buffer crosses a page boundary, then we kmalloc a bounce buffer and
+ * copy the data into it. The bounce buffer is stored in the variable
+ * pointed to by bounce_buf, for freeing up later on.  The bounce_buf
+ * should point to a stack variable, to avoid SMP issues.
+ */
+static dma_addr_t
+msm_nand_dma_map(struct device *dev, void *addr, size_t size,
+		 enum dma_data_direction dir, uint8_t **bounce_buf)
+{
+	int ret;
+	struct page *page;
+	unsigned long offset = (unsigned long)addr & ~PAGE_MASK;
+
+	if (virt_addr_valid(addr)) {
+		page = virt_to_page(addr);
+	} else {
+		if (size + offset > PAGE_SIZE) {
+			ret = msm_nand_alloc_bounce(addr, size, dir, bounce_buf);
+			if (ret < 0)
+				return DMA_ERROR_CODE;
+
+			offset = (unsigned long)*bounce_buf & ~PAGE_MASK;
+			page = virt_to_page(*bounce_buf);
+		} else {
+			page = vmalloc_to_page(addr);
+		}
+	}
+
+	return dma_map_page(dev, page, offset, size, dir);
+}
+
+static void msm_nand_dma_unmap(struct device *dev, dma_addr_t addr, size_t size,
+			       enum dma_data_direction dir,
+			       void *orig_buf, void *bounce_buf)
+{
+	dma_unmap_page(dev, addr, size, dir);
+
+	if (bounce_buf != NULL) {
+		if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
+			memcpy(orig_buf, bounce_buf, size);
+
+		kfree(bounce_buf);
+	}
+}
+
+uint32_t flash_read_id(struct msm_nand_chip *chip)
+{
+	struct {
+		dmov_s cmd[9];
+		unsigned cmdptr;
+		unsigned data[7];
+	} *dma_buffer;
+	uint32_t rv;
+	dmov_s *cmd;
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	dma_buffer->data[0] = 0 | 4;
+	dma_buffer->data[1] = MSM_NAND_CMD_FETCH_ID;
+	dma_buffer->data[2] = 1;
+	dma_buffer->data[3] = 0xeeeeeeee;
+	dma_buffer->data[4] = 0xeeeeeeee;
+	dma_buffer->data[5] = flash_rd_reg(chip, MSM_NAND_SFLASHC_BURST_CFG);
+	dma_buffer->data[6] = 0x00000000;
+	BUILD_BUG_ON(6 != ARRAY_SIZE(dma_buffer->data) - 1);
+
+	cmd = dma_buffer->cmd;
+
+	cmd->cmd = 0 | CMD_OCB;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[6]);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[6]);
+	cmd->dst = MSM_NAND_ADDR0;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[6]);
+	cmd->dst = MSM_NAND_ADDR1;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[0]);
+	cmd->dst = MSM_NAND_FLASH_CHIP_SELECT;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[1]);
+	cmd->dst = MSM_NAND_FLASH_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[2]);
+	cmd->dst = MSM_NAND_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_FLASH_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data[3]);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = MSM_NAND_READ_ID;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data[4]);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = CMD_OCU | CMD_LC;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data[5]);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->cmd) - 1);
+
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd) >> 3
+			) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	pr_info("status: %x\n", dma_buffer->data[3]);
+	pr_info("nandid: %x maker %02x device %02x\n",
+	       dma_buffer->data[4], dma_buffer->data[4] & 0xff,
+	       (dma_buffer->data[4] >> 8) & 0xff);
+	rv = dma_buffer->data[4];
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+	return rv;
+}
+
+struct flash_identification {
+	uint32_t flash_id;
+	uint32_t density;
+	uint32_t widebus;
+	uint32_t pagesize;
+	uint32_t blksize;
+	uint32_t oobsize;
+	uint32_t ecc_correctability;
+} supported_flash;
+
+uint16_t flash_onfi_crc_check(uint8_t *buffer, uint16_t count)
+{
+	int i;
+	uint16_t result;
+
+	for (i = 0; i < count; i++)
+		buffer[i] = bitrev8(buffer[i]);
+
+	result = bitrev16(crc16(bitrev16(0x4f4e), buffer, count));
+
+	for (i = 0; i < count; i++)
+		buffer[i] = bitrev8(buffer[i]);
+
+	return result;
+}
+
+static void flash_reset(struct msm_nand_chip *chip)
+{
+	struct {
+		dmov_s cmd[6];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t exec;
+			uint32_t flash_status;
+			uint32_t sflash_bcfg_orig;
+			uint32_t sflash_bcfg_mod;
+			uint32_t chip_select;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	dma_addr_t dma_cmd;
+	dma_addr_t dma_cmdptr;
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				      (chip, sizeof(*dma_buffer))));
+
+	dma_buffer->data.sflash_bcfg_orig
+		= flash_rd_reg(chip, MSM_NAND_SFLASHC_BURST_CFG);
+	dma_buffer->data.sflash_bcfg_mod = 0x00000000;
+	dma_buffer->data.chip_select = 4;
+	dma_buffer->data.cmd = MSM_NAND_CMD_RESET;
+	dma_buffer->data.exec = 1;
+	dma_buffer->data.flash_status = 0xeeeeeeee;
+
+	cmd = dma_buffer->cmd;
+
+	/* Put the Nand ctlr in Async mode and disable SFlash ctlr */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sflash_bcfg_mod);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.chip_select);
+	cmd->dst = MSM_NAND_FLASH_CHIP_SELECT;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on cmd ready, & write Reset command */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = MSM_NAND_FLASH_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = MSM_NAND_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_FLASH_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.flash_status);
+	cmd->len = 4;
+	cmd++;
+
+	/* Restore the SFLASH_BURST_CONFIG register */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sflash_bcfg_orig);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(6 != ARRAY_SIZE(dma_buffer->cmd));
+
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+	dma_cmd = msm_virt_to_dma(chip, dma_buffer->cmd);
+	dma_buffer->cmdptr = (dma_cmd >> 3) | CMD_PTR_LP;
+
+	mb();
+	dma_cmdptr = msm_virt_to_dma(chip, &dma_buffer->cmdptr);
+	msm_dmov_exec_cmd(chip->dma_channel,
+			  DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(dma_cmdptr));
+	mb();
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+}
+
+uint32_t flash_onfi_probe(struct msm_nand_chip *chip)
+{
+
+
+        	struct onfi_param_page {
+		uint32_t parameter_page_signature;
+		uint16_t revision_number;
+		uint16_t features_supported;
+		uint16_t optional_commands_supported;
+		uint8_t  reserved0[22];
+		uint8_t  device_manufacturer[12];
+		uint8_t  device_model[20];
+		uint8_t  jedec_manufacturer_id;
+		uint16_t date_code;
+		uint8_t  reserved1[13];
+		uint32_t number_of_data_bytes_per_page;
+		uint16_t number_of_spare_bytes_per_page;
+		uint32_t number_of_data_bytes_per_partial_page;
+		uint16_t number_of_spare_bytes_per_partial_page;
+		uint32_t number_of_pages_per_block;
+		uint32_t number_of_blocks_per_logical_unit;
+		uint8_t  number_of_logical_units;
+		uint8_t  number_of_address_cycles;
+		uint8_t  number_of_bits_per_cell;
+		uint16_t maximum_bad_blocks_per_logical_unit;
+		uint16_t block_endurance;
+		uint8_t  guaranteed_valid_begin_blocks;
+		uint16_t guaranteed_valid_begin_blocks_endurance;
+		uint8_t  number_of_programs_per_page;
+		uint8_t  partial_program_attributes;
+		uint8_t  number_of_bits_ecc_correctability;
+		uint8_t  number_of_interleaved_address_bits;
+		uint8_t  interleaved_operation_attributes;
+		uint8_t  reserved2[13];
+		uint8_t  io_pin_capacitance;
+		uint16_t timing_mode_support;
+		uint16_t program_cache_timing_mode_support;
+		uint16_t maximum_page_programming_time;
+		uint16_t maximum_block_erase_time;
+		uint16_t maximum_page_read_time;
+		uint16_t maximum_change_column_setup_time;
+		uint8_t  reserved3[23];
+		uint16_t vendor_specific_revision_number;
+		uint8_t  vendor_specific[88];
+		uint16_t integrity_crc;
+
+	} __attribute__((__packed__));
+
+	struct onfi_param_page *onfi_param_page_ptr;
+	uint8_t *onfi_identifier_buf = NULL;
+	uint8_t *onfi_param_info_buf = NULL;
+
+	struct {
+		dmov_s cmd[12];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t exec;
+			uint32_t flash_status;
+			uint32_t devcmd1_orig;
+			uint32_t devcmdvld_orig;
+			uint32_t devcmd1_mod;
+			uint32_t devcmdvld_mod;
+			uint32_t sflash_bcfg_orig;
+			uint32_t sflash_bcfg_mod;
+			uint32_t chip_select;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	unsigned page_address = 0;
+	int err = 0;
+	dma_addr_t dma_addr_param_info = 0;
+	dma_addr_t dma_addr_identifier = 0;
+	unsigned cmd_set_count = 2;
+	unsigned crc_chk_count = 0;
+
+	/*if (msm_nand_data.nr_parts) {
+		page_address = ((msm_nand_data.parts[0]).offset << 6);
+	} else {
+		pr_err("flash_onfi_probe: "
+				"No partition info available\n");
+		err = -EIO;
+		return err;
+	}*/
+
+	wait_event(chip->wait_queue, (onfi_identifier_buf =
+		msm_nand_get_dma_buffer(chip, ONFI_IDENTIFIER_LENGTH)));
+	dma_addr_identifier = msm_virt_to_dma(chip, onfi_identifier_buf);
+
+	wait_event(chip->wait_queue, (onfi_param_info_buf =
+		msm_nand_get_dma_buffer(chip, ONFI_PARAM_INFO_LENGTH)));
+	dma_addr_param_info = msm_virt_to_dma(chip, onfi_param_info_buf);
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	dma_buffer->data.sflash_bcfg_orig = flash_rd_reg
+				(chip, MSM_NAND_SFLASHC_BURST_CFG);
+	dma_buffer->data.devcmd1_orig = flash_rd_reg(chip, MSM_NAND_DEV_CMD1);
+	dma_buffer->data.devcmdvld_orig = flash_rd_reg(chip,
+						 MSM_NAND_DEV_CMD_VLD);
+	dma_buffer->data.chip_select = 4;
+
+	while (cmd_set_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		dma_buffer->data.devcmd1_mod = (dma_buffer->data.devcmd1_orig &
+				0xFFFFFF00) | (cmd_set_count
+				? FLASH_READ_ONFI_IDENTIFIER_COMMAND
+				: FLASH_READ_ONFI_PARAMETERS_COMMAND);
+		dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
+		dma_buffer->data.addr0 = (page_address << 16) | (cmd_set_count
+				? FLASH_READ_ONFI_IDENTIFIER_ADDRESS
+				: FLASH_READ_ONFI_PARAMETERS_ADDRESS);
+		dma_buffer->data.addr1 = (page_address >> 16) & 0xFF;
+		dma_buffer->data.cfg0 =	(cmd_set_count
+				? MSM_NAND_CFG0_RAW_ONFI_IDENTIFIER
+				: MSM_NAND_CFG0_RAW_ONFI_PARAM_INFO);
+		dma_buffer->data.cfg1 =	(cmd_set_count
+				? MSM_NAND_CFG1_RAW_ONFI_IDENTIFIER
+				: MSM_NAND_CFG1_RAW_ONFI_PARAM_INFO);
+		dma_buffer->data.sflash_bcfg_mod = 0x00000000;
+		dma_buffer->data.devcmdvld_mod = (dma_buffer->
+				data.devcmdvld_orig & 0xFFFFFFFE);
+		dma_buffer->data.exec = 1;
+		dma_buffer->data.flash_status = 0xeeeeeeee;
+
+		/* Put the Nand ctlr in Async mode and disable SFlash ctlr */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.sflash_bcfg_mod);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.chip_select);
+		cmd->dst = MSM_NAND_FLASH_CHIP_SELECT;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on cmd ready, & write CMD,ADDR0,ADDR1,CHIPSEL regs */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+		cmd->dst = MSM_NAND_FLASH_CMD;
+		cmd->len = 12;
+		cmd++;
+
+		/* Configure the CFG0 and CFG1 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.cfg0);
+		cmd->dst = MSM_NAND_DEV0_CFG0;
+		cmd->len = 8;
+		cmd++;
+
+		/* Configure the DEV_CMD_VLD register */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.devcmdvld_mod);
+		cmd->dst = MSM_NAND_DEV_CMD_VLD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Configure the DEV_CMD1 register */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.devcmd1_mod);
+		cmd->dst = MSM_NAND_DEV_CMD1;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.exec);
+		cmd->dst = MSM_NAND_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the two status registers */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_FLASH_STATUS;
+		cmd->dst = msm_virt_to_dma(chip,
+				&dma_buffer->data.flash_status);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read data block - valid only if status says success */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_FLASH_BUFFER;
+		cmd->dst = (cmd_set_count ? dma_addr_identifier :
+				dma_addr_param_info);
+		cmd->len = (cmd_set_count ? ONFI_IDENTIFIER_LENGTH :
+				ONFI_PARAM_INFO_LENGTH);
+		cmd++;
+
+		/* Restore the DEV_CMD1 register */
+		cmd->cmd = 0 ;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.devcmd1_orig);
+		cmd->dst = MSM_NAND_DEV_CMD1;
+		cmd->len = 4;
+		cmd++;
+
+		/* Restore the DEV_CMD_VLD register */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.devcmdvld_orig);
+		cmd->dst = MSM_NAND_DEV_CMD_VLD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Restore the SFLASH_BURST_CONFIG register */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.sflash_bcfg_orig);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		BUILD_BUG_ON(12 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+				>> 3) | CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+		mb();
+
+		/* Check for errors, protection violations etc */
+		if (dma_buffer->data.flash_status & 0x110) {
+			pr_info("MPU/OP error (0x%x) during "
+					"ONFI probe\n",
+					dma_buffer->data.flash_status);
+			err = -EIO;
+			break;
+		}
+
+		if (cmd_set_count) {
+			onfi_param_page_ptr = (struct onfi_param_page *)
+				(&(onfi_identifier_buf[0]));
+			if (onfi_param_page_ptr->parameter_page_signature !=
+					ONFI_PARAMETER_PAGE_SIGNATURE) {
+				pr_info("ONFI probe : Found a non"
+						"ONFI Compliant device \n");
+				err = -EIO;
+				break;
+			}
+		} else {
+			for (crc_chk_count = 0; crc_chk_count <
+					ONFI_PARAM_INFO_LENGTH
+					/ ONFI_PARAM_PAGE_LENGTH;
+					crc_chk_count++) {
+				onfi_param_page_ptr =
+					(struct onfi_param_page *)
+					(&(onfi_param_info_buf
+					[ONFI_PARAM_PAGE_LENGTH *
+					crc_chk_count]));
+				if (flash_onfi_crc_check(
+					(uint8_t *)onfi_param_page_ptr,
+					ONFI_PARAM_PAGE_LENGTH - 2) ==
+					onfi_param_page_ptr->integrity_crc) {
+					break;
+				}
+			}
+			if (crc_chk_count >= ONFI_PARAM_INFO_LENGTH
+					/ ONFI_PARAM_PAGE_LENGTH) {
+				pr_info("ONFI probe : CRC Check "
+						"failed on ONFI Parameter "
+						"data \n");
+				err = -EIO;
+				break;
+			} else {
+				supported_flash.flash_id =
+					flash_read_id(chip);
+				supported_flash.widebus  =
+					onfi_param_page_ptr->
+					features_supported & 0x01;
+				supported_flash.pagesize =
+					onfi_param_page_ptr->
+					number_of_data_bytes_per_page;
+				supported_flash.blksize  =
+					onfi_param_page_ptr->
+					number_of_pages_per_block *
+					supported_flash.pagesize;
+				supported_flash.oobsize  =
+					onfi_param_page_ptr->
+					number_of_spare_bytes_per_page;
+				supported_flash.density  =
+					onfi_param_page_ptr->
+					number_of_blocks_per_logical_unit
+					* supported_flash.blksize;
+				supported_flash.ecc_correctability =
+					onfi_param_page_ptr->
+					number_of_bits_ecc_correctability;
+
+				pr_info("ONFI probe : Found an ONFI "
+					"compliant device %s\n",
+					onfi_param_page_ptr->device_model);
+
+				/* Temporary hack for MT29F4G08ABC device.
+				 * Since the device is not properly adhering
+				 * to ONFi specification it is reporting
+				 * as 16 bit device though it is 8 bit device!!!
+				 */
+				if (!strncmp(onfi_param_page_ptr->device_model,
+					"MT29F4G08ABC", 12))
+					supported_flash.widebus  = 0;
+			}
+		}
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+	msm_nand_release_dma_buffer(chip, onfi_param_info_buf,
+			ONFI_PARAM_INFO_LENGTH);
+	msm_nand_release_dma_buffer(chip, onfi_identifier_buf,
+			ONFI_IDENTIFIER_LENGTH);
+
+	return err;
+}
+
+static int msm_nand_read_oob(struct mtd_info *mtd, loff_t from,
+			     struct mtd_oob_ops *ops)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[8 * 5 + 2];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t eccbchcfg;
+			uint32_t exec;
+			uint32_t ecccfg;
+			struct {
+				uint32_t flash_status;
+				uint32_t buffer_status;
+			} result[8];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned n;
+	unsigned page = 0;
+	uint32_t oob_len;
+	uint32_t sectordatasize;
+	uint32_t sectoroobsize;
+	int err, pageerr, rawerr;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+	uint8_t *dat_bounce_buf = NULL;
+	uint8_t *oob_bounce_buf = NULL;
+	uint32_t oob_col = 0;
+	unsigned page_count;
+	unsigned pages_read = 0;
+	unsigned start_sector = 0;
+	uint32_t ecc_errors;
+	uint32_t total_ecc_errors = 0;
+	unsigned cwperpage;
+#if VERBOSE
+	pr_info("================================================="
+			"================\n");
+	pr_info("%s:\nfrom 0x%llx mode %d\ndatbuf 0x%p datlen 0x%x"
+			"\noobbuf 0x%p ooblen 0x%x\n",
+			__func__, from, ops->mode, ops->datbuf, ops->len,
+			ops->oobbuf, ops->ooblen);
+#endif
+
+	if (mtd->writesize == 2048)
+		page = from >> 11;
+
+	if (mtd->writesize == 4096)
+		page = from >> 12;
+
+	oob_len = ops->ooblen;
+	cwperpage = (mtd->writesize >> 9);
+
+	if (from & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported from, 0x%llx\n",
+		       __func__, from);
+		return -EINVAL;
+	}
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0) {
+			/* when ops->datbuf is NULL, ops->len can be ooblen */
+			pr_err("%s: unsupported ops->len, %d\n",
+			       __func__, ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if (ops->datbuf != NULL &&
+			(ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len,"
+				" %d for MTD_OPS_RAW\n", __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if (ops->mode != MTD_OPS_RAW && ops->ooblen != 0 && ops->ooboffs != 0) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n",
+		       __func__, ops->ooboffs);
+		return -EINVAL;
+	}
+
+	if (ops->oobbuf && !ops->datbuf && ops->mode == MTD_OPS_AUTO_OOB)
+		start_sector = cwperpage - 1;
+
+	if (ops->oobbuf && !ops->datbuf) {
+		page_count = ops->ooblen / ((ops->mode == MTD_OPS_AUTO_OOB) ?
+			mtd->oobavail : mtd->oobsize);
+		if ((page_count == 0) && (ops->ooblen))
+			page_count = 1;
+	} else if (ops->mode != MTD_OPS_RAW)
+		page_count = ops->len / mtd->writesize;
+	else
+		page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	if (ops->datbuf) {
+		data_dma_addr_curr = data_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->datbuf, ops->len,
+					 DMA_FROM_DEVICE, &dat_bounce_buf);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("msm_nand_read_oob: failed to get dma addr "
+			       "for %p\n", ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		memset(ops->oobbuf, 0xff, ops->ooblen);
+		oob_dma_addr_curr = oob_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->oobbuf,
+					 ops->ooblen, DMA_BIDIRECTIONAL,
+					 &oob_bounce_buf);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("msm_nand_read_oob: failed to get dma addr "
+			       "for %p\n", ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	oob_col = start_sector * chip->cw_size;
+	if (chip->CFG1 & CFG1_WIDE_FLASH)
+		oob_col >>= 1;
+
+	err = 0;
+	while (page_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		/* CMD / ADDR0 / ADDR1 / CHIPSEL program values */
+		if (ops->mode != MTD_OPS_RAW) {
+			dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ_ECC;
+			dma_buffer->data.cfg0 =
+			(chip->CFG0 & ~(7U << 6))
+				| (((cwperpage-1) - start_sector) << 6);
+			dma_buffer->data.cfg1 = chip->CFG1;
+			if (enable_bch_ecc)
+				dma_buffer->data.eccbchcfg = chip->ecc_bch_cfg;
+		} else {
+			dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
+			dma_buffer->data.cfg0 = (chip->CFG0_RAW
+					& ~(7U << 6)) | ((cwperpage-1) << 6);
+			dma_buffer->data.cfg1 = chip->CFG1_RAW |
+					(chip->CFG1 & CFG1_WIDE_FLASH);
+		}
+
+		dma_buffer->data.addr0 = (page << 16) | oob_col;
+		dma_buffer->data.addr1 = (page >> 16) & 0xff;
+		/* chipsel_0 + enable DM interface */
+		dma_buffer->data.chipsel = 0 | 4;
+
+
+		/* GO bit for the EXEC register */
+		dma_buffer->data.exec = 1;
+
+
+		BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->data.result));
+
+		for (n = start_sector; n < cwperpage; n++) {
+			/* flash + buffer status return words */
+			dma_buffer->data.result[n].flash_status = 0xeeeeeeee;
+			dma_buffer->data.result[n].buffer_status = 0xeeeeeeee;
+
+			/* block on cmd ready, then
+			 * write CMD / ADDR0 / ADDR1 / CHIPSEL
+			 * regs in a burst
+			 */
+			cmd->cmd = DST_CRCI_NAND_CMD;
+			cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+			cmd->dst = MSM_NAND_FLASH_CMD;
+			if (n == start_sector)
+				cmd->len = 16;
+			else
+				cmd->len = 4;
+			cmd++;
+
+			if (n == start_sector) {
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cfg0);
+				cmd->dst = MSM_NAND_DEV0_CFG0;
+				if (enable_bch_ecc)
+					cmd->len = 12;
+				else
+					cmd->len = 8;
+				cmd++;
+
+				dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.ecccfg);
+				cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
+				cmd->len = 4;
+				cmd++;
+			}
+
+			/* kick the execute register */
+			cmd->cmd = 0;
+			cmd->src =
+				msm_virt_to_dma(chip, &dma_buffer->data.exec);
+			cmd->dst = MSM_NAND_EXEC_CMD;
+			cmd->len = 4;
+			cmd++;
+
+			/* block on data ready, then
+			 * read the status register
+			 */
+			cmd->cmd = SRC_CRCI_NAND_DATA;
+			cmd->src = MSM_NAND_FLASH_STATUS;
+			cmd->dst = msm_virt_to_dma(chip,
+						   &dma_buffer->data.result[n]);
+			/* MSM_NAND_FLASH_STATUS + MSM_NAND_BUFFER_STATUS */
+			cmd->len = 8;
+			cmd++;
+
+			/* read data block
+			 * (only valid if status says success)
+			 */
+			if (ops->datbuf) {
+				if (ops->mode != MTD_OPS_RAW) {
+					if (!boot_layout)
+						sectordatasize = (n < (cwperpage - 1))
+							? 516 : (512 - ((cwperpage - 1) << 2));
+					else
+						sectordatasize = 512;
+				} else {
+					sectordatasize = chip->cw_size;
+				}
+
+				cmd->cmd = 0;
+				cmd->src = MSM_NAND_FLASH_BUFFER;
+				cmd->dst = data_dma_addr_curr;
+				data_dma_addr_curr += sectordatasize;
+				cmd->len = sectordatasize;
+				cmd++;
+			}
+
+			if (ops->oobbuf && (n == (cwperpage - 1)
+			     || ops->mode != MTD_OPS_AUTO_OOB)) {
+				cmd->cmd = 0;
+				if (n == (cwperpage - 1)) {
+					cmd->src = MSM_NAND_FLASH_BUFFER +
+						(512 - ((cwperpage - 1) << 2));
+					sectoroobsize = (cwperpage << 2);
+					if (ops->mode != MTD_OPS_AUTO_OOB)
+						sectoroobsize +=
+							chip->ecc_parity_bytes;
+				} else {
+					cmd->src = MSM_NAND_FLASH_BUFFER + 516;
+					sectoroobsize = chip->ecc_parity_bytes;
+				}
+
+				cmd->dst = oob_dma_addr_curr;
+				if (sectoroobsize < oob_len)
+					cmd->len = sectoroobsize;
+				else
+					cmd->len = oob_len;
+				oob_dma_addr_curr += cmd->len;
+				oob_len -= cmd->len;
+				if (cmd->len > 0)
+					cmd++;
+			}
+		}
+
+		BUILD_BUG_ON(8 * 5 + 2 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr =
+			(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3)
+			| CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+		mb();
+
+		/* if any of the writes failed (0x10), or there
+		 * was a protection violation (0x100), we lose
+		 */
+		pageerr = rawerr = 0;
+		for (n = start_sector; n < cwperpage; n++) {
+			if (dma_buffer->data.result[n].flash_status & 0x110) {
+				rawerr = -EIO;
+				break;
+			}
+		}
+		if (rawerr) {
+			if (ops->datbuf && ops->mode != MTD_OPS_RAW) {
+				uint8_t *datbuf = ops->datbuf +
+					pages_read * mtd->writesize;
+
+				dma_sync_single_for_cpu(chip->dev,
+					data_dma_addr_curr-mtd->writesize,
+					mtd->writesize, DMA_BIDIRECTIONAL);
+
+				for (n = 0; n < mtd->writesize; n++) {
+					/* empty blocks read 0x54 at
+					 * these offsets
+					 */
+					if ((n % 516 == 3 || n % 516 == 175)
+							&& datbuf[n] == 0x54)
+						datbuf[n] = 0xff;
+					if (datbuf[n] != 0xff) {
+						pageerr = rawerr;
+						break;
+					}
+				}
+
+				dma_sync_single_for_device(chip->dev,
+					data_dma_addr_curr-mtd->writesize,
+					mtd->writesize, DMA_BIDIRECTIONAL);
+
+			}
+			if (ops->oobbuf) {
+				dma_sync_single_for_cpu(chip->dev,
+				oob_dma_addr_curr - (ops->ooblen - oob_len),
+				ops->ooblen - oob_len, DMA_BIDIRECTIONAL);
+
+				for (n = 0; n < ops->ooblen; n++) {
+					if (ops->oobbuf[n] != 0xff) {
+						pageerr = rawerr;
+						break;
+					}
+				}
+
+				dma_sync_single_for_device(chip->dev,
+				oob_dma_addr_curr - (ops->ooblen - oob_len),
+				ops->ooblen - oob_len, DMA_BIDIRECTIONAL);
+			}
+		}
+		if (pageerr) {
+			for (n = start_sector; n < cwperpage; n++) {
+				if (dma_buffer->data.result[n].buffer_status &
+					chip->uncorrectable_bit_mask) {
+					/* not thread safe */
+					mtd->ecc_stats.failed++;
+					pageerr = -EBADMSG;
+					break;
+				}
+			}
+		}
+		if (!rawerr) { /* check for corretable errors */
+			for (n = start_sector; n < cwperpage; n++) {
+				ecc_errors =
+				(dma_buffer->data.result[n].buffer_status
+				 & chip->num_err_mask);
+				if (ecc_errors) {
+					total_ecc_errors += ecc_errors;
+					/* not thread safe */
+					mtd->ecc_stats.corrected += ecc_errors;
+					if (ecc_errors > 1)
+						pageerr = -EUCLEAN;
+				}
+			}
+		}
+		if (pageerr && (pageerr != -EUCLEAN || err == 0))
+			err = pageerr;
+
+#if VERBOSE
+		if (rawerr && !pageerr) {
+			pr_err("msm_nand_read_oob %llx %x %x empty page\n",
+			       (loff_t)page * mtd->writesize, ops->len,
+			       ops->ooblen);
+		} else {
+			for (n = start_sector; n < cwperpage; n++)
+				pr_info("flash_status[%d] = %x,\
+				buffr_status[%d] = %x\n",
+				n, dma_buffer->data.result[n].flash_status,
+				n, dma_buffer->data.result[n].buffer_status);
+		}
+#endif
+		if (err && err != -EUCLEAN && err != -EBADMSG)
+			break;
+		pages_read++;
+		page++;
+	}
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (ops->oobbuf) {
+		msm_nand_dma_unmap(chip->dev, oob_dma_addr,
+				   ops->ooblen, DMA_FROM_DEVICE,
+				   ops->oobbuf, oob_bounce_buf);
+	}
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf) {
+		msm_nand_dma_unmap(chip->dev, data_dma_addr,
+				   ops->len, DMA_BIDIRECTIONAL,
+				   ops->datbuf, dat_bounce_buf);
+	}
+
+	if (ops->mode != MTD_OPS_RAW)
+		ops->retlen = mtd->writesize * pages_read;
+	else
+		ops->retlen = (mtd->writesize +  mtd->oobsize) *
+							pages_read;
+	ops->oobretlen = ops->ooblen - oob_len;
+	if (err)
+		pr_err("msm_nand_read_oob %llx %x %x failed %d, corrected %d\n",
+		       from, ops->datbuf ? ops->len : 0, ops->ooblen, err,
+		       total_ecc_errors);
+#if VERBOSE
+	pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+			__func__, err, ops->retlen, ops->oobretlen);
+
+	pr_info("==================================================="
+			"==============\n");
+#endif
+	return err;
+}
+
+static int msm_nand_read_oob_dualnandc(struct mtd_info *mtd, loff_t from,
+			struct mtd_oob_ops *ops)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[16 * 6 + 20];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t nandc01_addr0;
+			uint32_t nandc10_addr0;
+			uint32_t nandc11_addr1;
+			uint32_t chipsel_cs0;
+			uint32_t chipsel_cs1;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t eccbchcfg;
+			uint32_t exec;
+			uint32_t ecccfg;
+			uint32_t ebi2_chip_select_cfg0;
+			uint32_t adm_mux_data_ack_req_nc01;
+			uint32_t adm_mux_cmd_ack_req_nc01;
+			uint32_t adm_mux_data_ack_req_nc10;
+			uint32_t adm_mux_cmd_ack_req_nc10;
+			uint32_t adm_default_mux;
+			uint32_t default_ebi2_chip_select_cfg0;
+			uint32_t nc10_flash_dev_cmd_vld;
+			uint32_t nc10_flash_dev_cmd1;
+			uint32_t nc10_flash_dev_cmd_vld_default;
+			uint32_t nc10_flash_dev_cmd1_default;
+			struct {
+				uint32_t flash_status;
+				uint32_t buffer_status;
+			} result[16];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned n;
+	unsigned page = 0;
+	uint32_t oob_len;
+	uint32_t sectordatasize;
+	uint32_t sectoroobsize;
+	int err, pageerr, rawerr;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+	uint32_t oob_col = 0;
+	unsigned page_count;
+	unsigned pages_read = 0;
+	unsigned start_sector = 0;
+	uint32_t ecc_errors;
+	uint32_t total_ecc_errors = 0;
+	unsigned cwperpage;
+	unsigned cw_offset = chip->cw_size;
+#if VERBOSE
+		pr_info("================================================="
+				"============\n");
+		pr_info("%s:\nfrom 0x%llx mode %d\ndatbuf 0x%p datlen 0x%x"
+				"\noobbuf 0x%p ooblen 0x%x\n\n",
+				__func__, from, ops->mode, ops->datbuf,
+				ops->len, ops->oobbuf, ops->ooblen);
+#endif
+
+	if (mtd->writesize == 2048)
+		page = from >> 11;
+
+	if (mtd->writesize == 4096)
+		page = from >> 12;
+
+	if (interleave_enable)
+		page = (from >> 1) >> 12;
+
+	oob_len = ops->ooblen;
+	cwperpage = (mtd->writesize >> 9);
+
+	if (from & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported from, 0x%llx\n",
+		       __func__, from);
+		return -EINVAL;
+	}
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0) {
+			pr_err("%s: unsupported ops->len, %d\n",
+			       __func__, ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if (ops->datbuf != NULL &&
+			(ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len,"
+				" %d for MTD_OPS_RAW\n", __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if (ops->mode != MTD_OPS_RAW && ops->ooblen != 0 && ops->ooboffs != 0) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n",
+		       __func__, ops->ooboffs);
+		return -EINVAL;
+	}
+
+	if (ops->oobbuf && !ops->datbuf && ops->mode == MTD_OPS_AUTO_OOB)
+		start_sector = cwperpage - 1;
+
+	if (ops->oobbuf && !ops->datbuf) {
+		page_count = ops->ooblen / ((ops->mode == MTD_OPS_AUTO_OOB) ?
+			mtd->oobavail : mtd->oobsize);
+		if ((page_count == 0) && (ops->ooblen))
+			page_count = 1;
+	} else if (ops->mode != MTD_OPS_RAW)
+		page_count = ops->len / mtd->writesize;
+	else
+		page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	if (ops->datbuf) {
+		data_dma_addr_curr = data_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->datbuf, ops->len,
+					 DMA_FROM_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("msm_nand_read_oob_dualnandc: "
+				"failed to get dma addr for %p\n",
+				ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		memset(ops->oobbuf, 0xff, ops->ooblen);
+		oob_dma_addr_curr = oob_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->oobbuf,
+					 ops->ooblen, DMA_BIDIRECTIONAL, NULL);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("msm_nand_read_oob_dualnandc: "
+				"failed to get dma addr for %p\n",
+				ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	oob_col = start_sector * chip->cw_size;
+	if (chip->CFG1 & CFG1_WIDE_FLASH) {
+		oob_col >>= 1;
+		cw_offset >>= 1;
+	}
+
+	err = 0;
+	while (page_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		if (ops->mode != MTD_OPS_RAW) {
+			dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ_ECC;
+			if (start_sector == (cwperpage - 1)) {
+				dma_buffer->data.cfg0 = (chip->CFG0 &
+							~(7U << 6));
+			} else {
+				dma_buffer->data.cfg0 = (chip->CFG0 &
+				~(7U << 6))
+				| (((cwperpage >> 1)-1) << 6);
+			}
+			dma_buffer->data.cfg1 = chip->CFG1;
+			if (enable_bch_ecc)
+				dma_buffer->data.eccbchcfg = chip->ecc_bch_cfg;
+		} else {
+			dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
+			dma_buffer->data.cfg0 = ((chip->CFG0_RAW &
+				~(7U << 6)) | ((((cwperpage >> 1)-1) << 6)));
+			dma_buffer->data.cfg1 = chip->CFG1_RAW |
+					(chip->CFG1 & CFG1_WIDE_FLASH);
+		}
+
+		if (!interleave_enable) {
+			if (start_sector == (cwperpage - 1)) {
+				dma_buffer->data.nandc10_addr0 =
+							(page << 16) | oob_col;
+				dma_buffer->data.nc10_flash_dev_cmd_vld = 0xD;
+				dma_buffer->data.nc10_flash_dev_cmd1 =
+								0xF00F3000;
+			} else {
+				dma_buffer->data.nandc01_addr0 = page << 16;
+				/* NC10 ADDR0 points to the next code word */
+				dma_buffer->data.nandc10_addr0 = (page << 16) |
+								cw_offset;
+				dma_buffer->data.nc10_flash_dev_cmd_vld = 0x1D;
+				dma_buffer->data.nc10_flash_dev_cmd1 =
+								0xF00FE005;
+			}
+		} else {
+			dma_buffer->data.nandc01_addr0 =
+			dma_buffer->data.nandc10_addr0 =
+						(page << 16) | oob_col;
+		}
+		/* ADDR1 */
+		dma_buffer->data.nandc11_addr1 = (page >> 16) & 0xff;
+
+		dma_buffer->data.adm_mux_data_ack_req_nc01 = 0x00000A3C;
+		dma_buffer->data.adm_mux_cmd_ack_req_nc01  = 0x0000053C;
+		dma_buffer->data.adm_mux_data_ack_req_nc10 = 0x00000F28;
+		dma_buffer->data.adm_mux_cmd_ack_req_nc10  = 0x00000F14;
+		dma_buffer->data.adm_default_mux = 0x00000FC0;
+		dma_buffer->data.nc10_flash_dev_cmd_vld_default = 0x1D;
+		dma_buffer->data.nc10_flash_dev_cmd1_default = 0xF00F3000;
+
+		dma_buffer->data.ebi2_chip_select_cfg0 = 0x00000805;
+		dma_buffer->data.default_ebi2_chip_select_cfg0 = 0x00000801;
+
+		/* chipsel_0 + enable DM interface */
+		dma_buffer->data.chipsel_cs0 = (1<<4) | 4;
+		/* chipsel_1 + enable DM interface */
+		dma_buffer->data.chipsel_cs1 = (1<<4) | 5;
+
+		/* GO bit for the EXEC register */
+		dma_buffer->data.exec = 1;
+
+		BUILD_BUG_ON(16 != ARRAY_SIZE(dma_buffer->data.result));
+
+		for (n = start_sector; n < cwperpage; n++) {
+			/* flash + buffer status return words */
+			dma_buffer->data.result[n].flash_status = 0xeeeeeeee;
+			dma_buffer->data.result[n].buffer_status = 0xeeeeeeee;
+
+			if (n == start_sector) {
+				if (!interleave_enable) {
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+						data.nc10_flash_dev_cmd_vld);
+					cmd->dst = NC10(MSM_NAND_DEV_CMD_VLD);
+					cmd->len = 4;
+					cmd++;
+
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nc10_flash_dev_cmd1);
+					cmd->dst = NC10(MSM_NAND_DEV_CMD1);
+					cmd->len = 4;
+					cmd++;
+
+					/* NC01, NC10 --> ADDR1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc11_addr1);
+					cmd->dst = NC11(MSM_NAND_ADDR1);
+					cmd->len = 8;
+					cmd++;
+
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cfg0);
+					cmd->dst = NC11(MSM_NAND_DEV0_CFG0);
+					if (enable_bch_ecc)
+						cmd->len = 12;
+					else
+						cmd->len = 8;
+					cmd++;
+				} else {
+					/* enable CS0 & CS1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+						data.ebi2_chip_select_cfg0);
+					cmd->dst = EBI2_CHIP_SELECT_CFG0;
+					cmd->len = 4;
+					cmd++;
+
+					/* NC01, NC10 --> ADDR1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc11_addr1);
+					cmd->dst = NC11(MSM_NAND_ADDR1);
+					cmd->len = 4;
+					cmd++;
+
+					/* Enable CS0 for NC01 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.chipsel_cs0);
+					cmd->dst =
+					NC01(MSM_NAND_FLASH_CHIP_SELECT);
+					cmd->len = 4;
+					cmd++;
+
+					/* Enable CS1 for NC10 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.chipsel_cs1);
+					cmd->dst =
+					NC10(MSM_NAND_FLASH_CHIP_SELECT);
+					cmd->len = 4;
+					cmd++;
+
+					/* config DEV0_CFG0 & CFG1 for CS0 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.cfg0);
+					cmd->dst = NC01(MSM_NAND_DEV0_CFG0);
+					cmd->len = 8;
+					cmd++;
+
+					/* config DEV1_CFG0 & CFG1 for CS1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.cfg0);
+					cmd->dst = NC10(MSM_NAND_DEV1_CFG0);
+					cmd->len = 8;
+					cmd++;
+				}
+
+				dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.ecccfg);
+				cmd->dst = NC11(MSM_NAND_EBI2_ECC_BUF_CFG);
+				cmd->len = 4;
+				cmd++;
+
+				/* if 'only' the last code word */
+				if (n == cwperpage - 1) {
+					/* MASK CMD ACK/REQ --> NC01 (0x53C)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+						data.adm_mux_cmd_ack_req_nc01);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* CMD */
+					cmd->cmd = DST_CRCI_NAND_CMD;
+					cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cmd);
+					cmd->dst = NC10(MSM_NAND_FLASH_CMD);
+					cmd->len = 4;
+					cmd++;
+
+					/* NC10 --> ADDR0 ( 0x0 ) */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc10_addr0);
+					cmd->dst = NC10(MSM_NAND_ADDR0);
+					cmd->len = 4;
+					cmd++;
+
+					/* kick the execute reg for NC10 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.exec);
+					cmd->dst = NC10(MSM_NAND_EXEC_CMD);
+					cmd->len = 4;
+					cmd++;
+
+					/* MASK DATA ACK/REQ --> NC01 (0xA3C)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.adm_mux_data_ack_req_nc01);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* block on data ready from NC10, then
+					 * read the status register
+					 */
+					cmd->cmd = SRC_CRCI_NAND_DATA;
+					cmd->src = NC10(MSM_NAND_FLASH_STATUS);
+					cmd->dst = msm_virt_to_dma(chip,
+						&dma_buffer->data.result[n]);
+					/* MSM_NAND_FLASH_STATUS +
+					 * MSM_NAND_BUFFER_STATUS
+					 */
+					cmd->len = 8;
+					cmd++;
+				} else {
+					/* NC01 --> ADDR0 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc01_addr0);
+					cmd->dst = NC01(MSM_NAND_ADDR0);
+					cmd->len = 4;
+					cmd++;
+
+					/* NC10 --> ADDR1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc10_addr0);
+					cmd->dst = NC10(MSM_NAND_ADDR0);
+					cmd->len = 4;
+					cmd++;
+
+					/* MASK CMD ACK/REQ --> NC10 (0xF14)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+						data.adm_mux_cmd_ack_req_nc10);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* CMD */
+					cmd->cmd = DST_CRCI_NAND_CMD;
+					cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cmd);
+					cmd->dst = NC01(MSM_NAND_FLASH_CMD);
+					cmd->len = 4;
+					cmd++;
+
+					/* kick the execute register for NC01*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						 &dma_buffer->data.exec);
+					cmd->dst = NC01(MSM_NAND_EXEC_CMD);
+					cmd->len = 4;
+					cmd++;
+				}
+			}
+
+			/* read data block
+			 * (only valid if status says success)
+			 */
+			if (ops->datbuf || (ops->oobbuf &&
+						 ops->mode != MTD_OPS_AUTO_OOB)) {
+				if (ops->mode != MTD_OPS_RAW)
+					sectordatasize = (n < (cwperpage - 1))
+					? 516 : (512 - ((cwperpage - 1) << 2));
+				else
+					sectordatasize = chip->cw_size;
+
+				if (n % 2 == 0) {
+					/* MASK DATA ACK/REQ --> NC10 (0xF28)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.adm_mux_data_ack_req_nc10);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* block on data ready from NC01, then
+					 * read the status register
+					 */
+					cmd->cmd = SRC_CRCI_NAND_DATA;
+					cmd->src = NC01(MSM_NAND_FLASH_STATUS);
+					cmd->dst = msm_virt_to_dma(chip,
+						&dma_buffer->data.result[n]);
+					/* MSM_NAND_FLASH_STATUS +
+					 * MSM_NAND_BUFFER_STATUS
+					 */
+					cmd->len = 8;
+					cmd++;
+
+					/* MASK CMD ACK/REQ --> NC01 (0x53C)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+						data.adm_mux_cmd_ack_req_nc01);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* CMD */
+					cmd->cmd = DST_CRCI_NAND_CMD;
+					cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cmd);
+					cmd->dst = NC10(MSM_NAND_FLASH_CMD);
+					cmd->len = 4;
+					cmd++;
+
+					/* kick the execute register for NC10 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.exec);
+					cmd->dst = NC10(MSM_NAND_EXEC_CMD);
+					cmd->len = 4;
+					cmd++;
+
+					/* Read only when there is data
+					 * buffer
+					 */
+					if (ops->datbuf) {
+						cmd->cmd = 0;
+						cmd->src =
+						NC01(MSM_NAND_FLASH_BUFFER);
+						cmd->dst = data_dma_addr_curr;
+						data_dma_addr_curr +=
+						sectordatasize;
+						cmd->len = sectordatasize;
+						cmd++;
+					}
+				} else {
+					/* MASK DATA ACK/REQ -->
+					 * NC01 (0xA3C)
+					 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.adm_mux_data_ack_req_nc01);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* block on data ready from NC10
+					 * then read the status register
+					 */
+					cmd->cmd = SRC_CRCI_NAND_DATA;
+					cmd->src =
+					NC10(MSM_NAND_FLASH_STATUS);
+					cmd->dst = msm_virt_to_dma(chip,
+					   &dma_buffer->data.result[n]);
+					/* MSM_NAND_FLASH_STATUS +
+					 * MSM_NAND_BUFFER_STATUS
+					 */
+					cmd->len = 8;
+					cmd++;
+					if (n != cwperpage - 1) {
+						/* MASK CMD ACK/REQ -->
+						 * NC10 (0xF14)
+						 */
+						cmd->cmd = 0;
+						cmd->src =
+						msm_virt_to_dma(chip,
+						&dma_buffer->
+						data.adm_mux_cmd_ack_req_nc10);
+						cmd->dst = EBI2_NAND_ADM_MUX;
+						cmd->len = 4;
+						cmd++;
+
+						/* CMD */
+						cmd->cmd = DST_CRCI_NAND_CMD;
+						cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cmd);
+						cmd->dst =
+						NC01(MSM_NAND_FLASH_CMD);
+						cmd->len = 4;
+						cmd++;
+
+						/* EXEC */
+						cmd->cmd = 0;
+						cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.exec);
+						cmd->dst =
+						NC01(MSM_NAND_EXEC_CMD);
+						cmd->len = 4;
+						cmd++;
+					}
+
+					/* Read only when there is data
+					 * buffer
+					 */
+					if (ops->datbuf) {
+						cmd->cmd = 0;
+						cmd->src =
+						NC10(MSM_NAND_FLASH_BUFFER);
+						cmd->dst = data_dma_addr_curr;
+						data_dma_addr_curr +=
+						sectordatasize;
+						cmd->len = sectordatasize;
+						cmd++;
+					}
+				}
+			}
+
+			if (ops->oobbuf && (n == (cwperpage - 1)
+			     || ops->mode != MTD_OPS_AUTO_OOB)) {
+				cmd->cmd = 0;
+				if (n == (cwperpage - 1)) {
+					/* Use NC10 for reading the
+					 * last codeword!!!
+					 */
+					cmd->src = NC10(MSM_NAND_FLASH_BUFFER) +
+						(512 - ((cwperpage - 1) << 2));
+					sectoroobsize = (cwperpage << 2);
+					if (ops->mode != MTD_OPS_AUTO_OOB)
+						sectoroobsize +=
+							chip->ecc_parity_bytes;
+				} else {
+					if (n % 2 == 0)
+						cmd->src =
+						NC01(MSM_NAND_FLASH_BUFFER)
+						+ 516;
+					else
+						cmd->src =
+						NC10(MSM_NAND_FLASH_BUFFER)
+						+ 516;
+					sectoroobsize = chip->ecc_parity_bytes;
+				}
+				cmd->dst = oob_dma_addr_curr;
+				if (sectoroobsize < oob_len)
+					cmd->len = sectoroobsize;
+				else
+					cmd->len = oob_len;
+				oob_dma_addr_curr += cmd->len;
+				oob_len -= cmd->len;
+				if (cmd->len > 0)
+					cmd++;
+			}
+		}
+		/* ADM --> Default mux state (0xFC0) */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_default_mux);
+		cmd->dst = EBI2_NAND_ADM_MUX;
+		cmd->len = 4;
+		cmd++;
+
+		if (!interleave_enable) {
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.nc10_flash_dev_cmd_vld_default);
+			cmd->dst = NC10(MSM_NAND_DEV_CMD_VLD);
+			cmd->len = 4;
+			cmd++;
+
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.nc10_flash_dev_cmd1_default);
+			cmd->dst = NC10(MSM_NAND_DEV_CMD1);
+			cmd->len = 4;
+			cmd++;
+		} else {
+			/* disable CS1 */
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.default_ebi2_chip_select_cfg0);
+			cmd->dst = EBI2_CHIP_SELECT_CFG0;
+			cmd->len = 4;
+			cmd++;
+		}
+
+		BUILD_BUG_ON(16 * 6 + 20 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr =
+			(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3)
+			| CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+		mb();
+
+		/* if any of the writes failed (0x10), or there
+		 * was a protection violation (0x100), we lose
+		 */
+		pageerr = rawerr = 0;
+		for (n = start_sector; n < cwperpage; n++) {
+			if (dma_buffer->data.result[n].flash_status & 0x110) {
+				rawerr = -EIO;
+				break;
+			}
+		}
+		if (rawerr) {
+			if (ops->datbuf && ops->mode != MTD_OPS_RAW) {
+				uint8_t *datbuf = ops->datbuf +
+					pages_read * mtd->writesize;
+
+				dma_sync_single_for_cpu(chip->dev,
+					data_dma_addr_curr-mtd->writesize,
+					mtd->writesize, DMA_BIDIRECTIONAL);
+
+				for (n = 0; n < mtd->writesize; n++) {
+					/* empty blocks read 0x54 at
+					 * these offsets
+					 */
+					if ((n % 516 == 3 || n % 516 == 175)
+							&& datbuf[n] == 0x54)
+						datbuf[n] = 0xff;
+					if (datbuf[n] != 0xff) {
+						pageerr = rawerr;
+						break;
+					}
+				}
+
+				dma_sync_single_for_device(chip->dev,
+					data_dma_addr_curr-mtd->writesize,
+					mtd->writesize, DMA_BIDIRECTIONAL);
+
+			}
+			if (ops->oobbuf) {
+				dma_sync_single_for_cpu(chip->dev,
+				oob_dma_addr_curr - (ops->ooblen - oob_len),
+				ops->ooblen - oob_len, DMA_BIDIRECTIONAL);
+
+				for (n = 0; n < ops->ooblen; n++) {
+					if (ops->oobbuf[n] != 0xff) {
+						pageerr = rawerr;
+						break;
+					}
+				}
+
+				dma_sync_single_for_device(chip->dev,
+				oob_dma_addr_curr - (ops->ooblen - oob_len),
+				ops->ooblen - oob_len, DMA_BIDIRECTIONAL);
+			}
+		}
+		if (pageerr) {
+			for (n = start_sector; n < cwperpage; n++) {
+				if (dma_buffer->data.result[n].buffer_status
+					& chip->uncorrectable_bit_mask) {
+					/* not thread safe */
+					mtd->ecc_stats.failed++;
+					pageerr = -EBADMSG;
+					break;
+				}
+			}
+		}
+		if (!rawerr) { /* check for corretable errors */
+			for (n = start_sector; n < cwperpage; n++) {
+				ecc_errors = dma_buffer->data.
+					result[n].buffer_status
+					& chip->num_err_mask;
+				if (ecc_errors) {
+					total_ecc_errors += ecc_errors;
+					/* not thread safe */
+					mtd->ecc_stats.corrected += ecc_errors;
+					if (ecc_errors > 1)
+						pageerr = -EUCLEAN;
+				}
+			}
+		}
+		if (pageerr && (pageerr != -EUCLEAN || err == 0))
+			err = pageerr;
+
+#if VERBOSE
+		if (rawerr && !pageerr) {
+			pr_err("msm_nand_read_oob_dualnandc "
+				"%llx %x %x empty page\n",
+			       (loff_t)page * mtd->writesize, ops->len,
+			       ops->ooblen);
+		} else {
+			for (n = start_sector; n < cwperpage; n++) {
+				if (n%2) {
+					pr_info("NC10: flash_status[%d] = %x, "
+					 "buffr_status[%d] = %x\n",
+					n, dma_buffer->
+						data.result[n].flash_status,
+					n, dma_buffer->
+						data.result[n].buffer_status);
+				} else {
+					pr_info("NC01: flash_status[%d] = %x, "
+					 "buffr_status[%d] = %x\n",
+					n, dma_buffer->
+						data.result[n].flash_status,
+					n, dma_buffer->
+						data.result[n].buffer_status);
+				}
+			}
+		}
+#endif
+		if (err && err != -EUCLEAN && err != -EBADMSG)
+			break;
+		pages_read++;
+		page++;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (ops->oobbuf) {
+		dma_unmap_page(chip->dev, oob_dma_addr,
+				 ops->ooblen, DMA_FROM_DEVICE);
+	}
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf) {
+		dma_unmap_page(chip->dev, data_dma_addr,
+				 ops->len, DMA_BIDIRECTIONAL);
+	}
+
+	if (ops->mode != MTD_OPS_RAW)
+		ops->retlen = mtd->writesize * pages_read;
+	else
+		ops->retlen = (mtd->writesize +  mtd->oobsize) *
+							pages_read;
+	ops->oobretlen = ops->ooblen - oob_len;
+	if (err)
+		pr_err("msm_nand_read_oob_dualnandc "
+			"%llx %x %x failed %d, corrected %d\n",
+			from, ops->datbuf ? ops->len : 0, ops->ooblen, err,
+			total_ecc_errors);
+#if VERBOSE
+	pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+			__func__, err, ops->retlen, ops->oobretlen);
+
+	pr_info("==================================================="
+			"==========\n");
+#endif
+	return err;
+}
+
+static int
+msm_nand_read(struct mtd_info *mtd, loff_t from, size_t len,
+	      size_t *retlen, u_char *buf)
+{
+	int ret;
+	struct mtd_ecc_stats stats;
+	struct mtd_oob_ops ops;
+	int (*read_oob)(struct mtd_info *, loff_t, struct mtd_oob_ops *);
+
+	if (!dual_nand_ctlr_present)
+		read_oob = msm_nand_read_oob;
+	else
+		read_oob = msm_nand_read_oob_dualnandc;
+
+	ops.mode = MTD_OPS_PLACE_OOB;
+	ops.retlen = 0;
+	ops.ooblen = 0;
+	ops.oobbuf = NULL;
+	ret = 0;
+	*retlen = 0;
+	stats = mtd->ecc_stats;
+
+	if ((from & (mtd->writesize - 1)) == 0 && len == mtd->writesize) {
+		/* reading a page on page boundary */
+		ops.len = len;
+		ops.datbuf = buf;
+		ret = read_oob(mtd, from, &ops);
+		*retlen = ops.retlen;
+	} else if (len > 0) {
+		/* reading any size on any offset. partial page is supported */
+		u8 *bounce_buf;
+		loff_t aligned_from;
+		loff_t offset;
+		size_t actual_len;
+
+		bounce_buf = kmalloc(mtd->writesize, GFP_KERNEL);
+		if (!bounce_buf) {
+			pr_err("%s: could not allocate memory\n", __func__);
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		ops.len = mtd->writesize;
+		offset = from & (mtd->writesize - 1);
+		aligned_from = from - offset;
+
+		for (;;) {
+			int no_copy;
+
+			actual_len = mtd->writesize - offset;
+			if (actual_len > len)
+				actual_len = len;
+
+			no_copy = (offset == 0 && actual_len == mtd->writesize);
+			ops.datbuf = (no_copy) ? buf : bounce_buf;
+
+			/*
+			 * MTD API requires that all the pages are to
+			 * be read even if uncorrectable or
+			 * correctable ECC errors occur.
+			 */
+			ret = read_oob(mtd, aligned_from, &ops);
+			if (ret == -EBADMSG || ret == -EUCLEAN)
+				ret = 0;
+
+			if (ret < 0)
+				break;
+
+			if (!no_copy)
+				memcpy(buf, bounce_buf + offset, actual_len);
+
+			len -= actual_len;
+			*retlen += actual_len;
+			if (len == 0)
+				break;
+
+			buf += actual_len;
+			offset = 0;
+			aligned_from += mtd->writesize;
+		}
+
+		kfree(bounce_buf);
+	}
+
+out:
+	if (ret)
+		return ret;
+
+	if (mtd->ecc_stats.failed - stats.failed)
+		return -EBADMSG;
+
+	if (mtd->ecc_stats.corrected - stats.corrected)
+		return -EUCLEAN;
+
+	return 0;
+}
+
+static int
+msm_nand_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops)
+{
+        struct msm_nand_chip *chip = mtd->priv;
+	struct {
+		dmov_s cmd[8 * 7 + 2];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t eccbchcfg;
+			uint32_t exec;
+			uint32_t ecccfg;
+			uint32_t clrfstatus;
+			uint32_t clrrstatus;
+			uint32_t flash_status[8];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned n;
+	unsigned page = 0;
+	uint32_t oob_len;
+	uint32_t sectordatawritesize;
+	int err = 0;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+	uint8_t *dat_bounce_buf = NULL;
+	uint8_t *oob_bounce_buf = NULL;
+	unsigned page_count;
+	unsigned pages_written = 0;
+	unsigned cwperpage;
+#if VERBOSE
+	pr_info("================================================="
+			"================\n");
+	pr_info("%s:\nto 0x%llx mode %d\ndatbuf 0x%p datlen 0x%x"
+			"\noobbuf 0x%p ooblen 0x%x\n",
+			__func__, to, ops->mode, ops->datbuf, ops->len,
+			ops->oobbuf, ops->ooblen);
+#endif
+
+	if (mtd->writesize == 2048)
+		page = to >> 11;
+
+	if (mtd->writesize == 4096)
+		page = to >> 12;
+
+	oob_len = ops->ooblen;
+	cwperpage = (mtd->writesize >> 9);
+
+	if (to & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported to, 0x%llx\n", __func__, to);
+		return -EINVAL;
+	}
+
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->ooblen != 0 && ops->mode != MTD_OPS_AUTO_OOB) {
+			pr_err("%s: unsupported ops->mode,%d\n",
+					 __func__, ops->mode);
+			return -EINVAL;
+		}
+		if ((ops->len % mtd->writesize) != 0) {
+			pr_err("%s: unsupported ops->len, %d\n",
+					__func__, ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if ((ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len, "
+				"%d for MTD_OPS_RAW mode\n",
+				 __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if (ops->datbuf == NULL) {
+		pr_err("%s: unsupported ops->datbuf == NULL\n", __func__);
+		return -EINVAL;
+	}
+	if (ops->mode != MTD_OPS_RAW && ops->ooblen != 0 && ops->ooboffs != 0) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n",
+		       __func__, ops->ooboffs);
+		return -EINVAL;
+	}
+
+	if (ops->datbuf) {
+		data_dma_addr_curr = data_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->datbuf,
+					 ops->len, DMA_TO_DEVICE,
+					 &dat_bounce_buf);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("msm_nand_write_oob: failed to get dma addr "
+			       "for %p\n", ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		oob_dma_addr_curr = oob_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->oobbuf,
+					 ops->ooblen, DMA_TO_DEVICE,
+					 &oob_bounce_buf);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("msm_nand_write_oob: failed to get dma addr "
+			       "for %p\n", ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+	if (ops->mode != MTD_OPS_RAW)
+		page_count = ops->len / mtd->writesize;
+	else
+		page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	wait_event(chip->wait_queue, (dma_buffer =
+			msm_nand_get_dma_buffer(chip, sizeof(*dma_buffer))));
+
+	while (page_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		if (ops->mode != MTD_OPS_RAW) {
+			dma_buffer->data.cfg0 = chip->CFG0;
+			dma_buffer->data.cfg1 = chip->CFG1;
+			if (enable_bch_ecc)
+				dma_buffer->data.eccbchcfg = chip->ecc_bch_cfg;
+		} else {
+			dma_buffer->data.cfg0 = (chip->CFG0_RAW &
+					~(7U << 6)) | ((cwperpage-1) << 6);
+			dma_buffer->data.cfg1 = chip->CFG1_RAW |
+						(chip->CFG1 & CFG1_WIDE_FLASH);
+		}
+
+		/* CMD / ADDR0 / ADDR1 / CHIPSEL program values */
+		dma_buffer->data.cmd = MSM_NAND_CMD_PRG_PAGE;
+		dma_buffer->data.addr0 = page << 16;
+		dma_buffer->data.addr1 = (page >> 16) & 0xff;
+		/* chipsel_0 + enable DM interface */
+		dma_buffer->data.chipsel = 0 | 4;
+
+
+		/* GO bit for the EXEC register */
+		dma_buffer->data.exec = 1;
+		dma_buffer->data.clrfstatus = 0x00000020;
+		dma_buffer->data.clrrstatus = 0x000000C0;
+
+		BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->data.flash_status));
+
+		for (n = 0; n < cwperpage ; n++) {
+			/* status return words */
+			dma_buffer->data.flash_status[n] = 0xeeeeeeee;
+			/* block on cmd ready, then
+			 * write CMD / ADDR0 / ADDR1 / CHIPSEL regs in a burst
+			 */
+			cmd->cmd = DST_CRCI_NAND_CMD;
+			cmd->src =
+				msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+			cmd->dst = MSM_NAND_FLASH_CMD;
+			if (n == 0)
+				cmd->len = 16;
+			else
+				cmd->len = 4;
+			cmd++;
+
+			if (n == 0) {
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+							&dma_buffer->data.cfg0);
+				cmd->dst = MSM_NAND_DEV0_CFG0;
+				if (enable_bch_ecc)
+					cmd->len = 12;
+				else
+					cmd->len = 8;
+				cmd++;
+
+				dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						 &dma_buffer->data.ecccfg);
+				cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
+				cmd->len = 4;
+				cmd++;
+			}
+
+			/* write data block */
+			if (ops->mode != MTD_OPS_RAW) {
+				if (!boot_layout)
+					sectordatawritesize = (n < (cwperpage - 1)) ?
+						516 : (512 - ((cwperpage - 1) << 2));
+				else
+					sectordatawritesize = 512;
+			} else {
+				sectordatawritesize = chip->cw_size;
+			}
+
+			cmd->cmd = 0;
+			cmd->src = data_dma_addr_curr;
+			data_dma_addr_curr += sectordatawritesize;
+			cmd->dst = MSM_NAND_FLASH_BUFFER;
+			cmd->len = sectordatawritesize;
+			cmd++;
+
+			if (ops->oobbuf) {
+				if (n == (cwperpage - 1)) {
+					cmd->cmd = 0;
+					cmd->src = oob_dma_addr_curr;
+					cmd->dst = MSM_NAND_FLASH_BUFFER +
+						(512 - ((cwperpage - 1) << 2));
+					if ((cwperpage << 2) < oob_len)
+						cmd->len = (cwperpage << 2);
+					else
+						cmd->len = oob_len;
+					oob_dma_addr_curr += cmd->len;
+					oob_len -= cmd->len;
+					if (cmd->len > 0)
+						cmd++;
+				}
+				if (ops->mode != MTD_OPS_AUTO_OOB) {
+					/* skip ecc bytes in oobbuf */
+					if (oob_len < chip->ecc_parity_bytes) {
+						oob_dma_addr_curr +=
+							chip->ecc_parity_bytes;
+						oob_len -=
+							chip->ecc_parity_bytes;
+					} else {
+						oob_dma_addr_curr += oob_len;
+						oob_len = 0;
+					}
+				}
+			}
+
+			/* kick the execute register */
+			cmd->cmd = 0;
+			cmd->src =
+				msm_virt_to_dma(chip, &dma_buffer->data.exec);
+			cmd->dst = MSM_NAND_EXEC_CMD;
+			cmd->len = 4;
+			cmd++;
+
+			/* block on data ready, then
+			 * read the status register
+			 */
+			cmd->cmd = SRC_CRCI_NAND_DATA;
+			cmd->src = MSM_NAND_FLASH_STATUS;
+			cmd->dst = msm_virt_to_dma(chip,
+					     &dma_buffer->data.flash_status[n]);
+			cmd->len = 4;
+			cmd++;
+
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.clrfstatus);
+			cmd->dst = MSM_NAND_FLASH_STATUS;
+			cmd->len = 4;
+			cmd++;
+
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.clrrstatus);
+			cmd->dst = MSM_NAND_READ_STATUS;
+			cmd->len = 4;
+			cmd++;
+
+		}
+
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+		BUILD_BUG_ON(8 * 7 + 2 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmdptr =
+			(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) |
+			CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(
+				msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+		mb();
+
+		/* if any of the writes failed (0x10), or there was a
+		 * protection violation (0x100), or the program success
+		 * bit (0x80) is unset, we lose
+		 */
+		err = 0;
+		for (n = 0; n < cwperpage; n++) {
+			if (dma_buffer->data.flash_status[n] & 0x110) {
+				err = -EIO;
+				break;
+			}
+			if (!(dma_buffer->data.flash_status[n] & 0x80)) {
+				err = -EIO;
+				break;
+			}
+		}
+
+#if VERBOSE
+		for (n = 0; n < cwperpage; n++)
+			pr_info("write pg %d: flash_status[%d] = %x\n", page,
+				n, dma_buffer->data.flash_status[n]);
+
+#endif
+		if (err)
+			break;
+		pages_written++;
+		page++;
+	}
+	if (ops->mode != MTD_OPS_RAW)
+		ops->retlen = mtd->writesize * pages_written;
+	else
+		ops->retlen = (mtd->writesize + mtd->oobsize) * pages_written;
+
+	ops->oobretlen = ops->ooblen - oob_len;
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (ops->oobbuf) {
+		msm_nand_dma_unmap(chip->dev, oob_dma_addr,
+				   ops->ooblen, DMA_TO_DEVICE,
+				   ops->oobbuf, oob_bounce_buf);
+	}
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf) {
+		msm_nand_dma_unmap(chip->dev, data_dma_addr, ops->len,
+				   DMA_TO_DEVICE, ops->datbuf,
+				   dat_bounce_buf);
+	}
+	if (err)
+		pr_err("msm_nand_write_oob %llx %x %x failed %d\n",
+		       to, ops->len, ops->ooblen, err);
+
+#if VERBOSE
+		pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+				__func__, err, ops->retlen, ops->oobretlen);
+
+		pr_info("==================================================="
+				"==============\n");
+#endif
+	return err;
+}
+
+static int
+msm_nand_write_oob_dualnandc(struct mtd_info *mtd, loff_t to,
+				struct mtd_oob_ops *ops)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+	struct {
+		dmov_s cmd[16 * 6 + 18];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t nandc01_addr0;
+			uint32_t nandc10_addr0;
+			uint32_t nandc11_addr1;
+			uint32_t chipsel_cs0;
+			uint32_t chipsel_cs1;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t eccbchcfg;
+			uint32_t exec;
+			uint32_t ecccfg;
+			uint32_t cfg0_nc01;
+			uint32_t ebi2_chip_select_cfg0;
+			uint32_t adm_mux_data_ack_req_nc01;
+			uint32_t adm_mux_cmd_ack_req_nc01;
+			uint32_t adm_mux_data_ack_req_nc10;
+			uint32_t adm_mux_cmd_ack_req_nc10;
+			uint32_t adm_default_mux;
+			uint32_t default_ebi2_chip_select_cfg0;
+			uint32_t nc01_flash_dev_cmd_vld;
+			uint32_t nc10_flash_dev_cmd0;
+			uint32_t nc01_flash_dev_cmd_vld_default;
+			uint32_t nc10_flash_dev_cmd0_default;
+			uint32_t flash_status[16];
+			uint32_t clrfstatus;
+			uint32_t clrrstatus;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned n;
+	unsigned page = 0;
+	uint32_t oob_len;
+	uint32_t sectordatawritesize;
+	int err = 0;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+	unsigned page_count;
+	unsigned pages_written = 0;
+	unsigned cwperpage;
+	unsigned cw_offset = chip->cw_size;
+#if VERBOSE
+		pr_info("================================================="
+				"============\n");
+		pr_info("%s:\nto 0x%llx mode %d\ndatbuf 0x%p datlen 0x%x"
+				"\noobbuf 0x%p ooblen 0x%x\n\n",
+				__func__, to, ops->mode, ops->datbuf, ops->len,
+				ops->oobbuf, ops->ooblen);
+#endif
+
+	if (mtd->writesize == 2048)
+		page = to >> 11;
+
+	if (mtd->writesize == 4096)
+		page = to >> 12;
+
+	if (interleave_enable)
+		page = (to >> 1) >> 12;
+
+	oob_len = ops->ooblen;
+	cwperpage = (mtd->writesize >> 9);
+
+	if (to & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported to, 0x%llx\n", __func__, to);
+		return -EINVAL;
+	}
+
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->ooblen != 0 && ops->mode != MTD_OPS_AUTO_OOB) {
+			pr_err("%s: unsupported ops->mode,%d\n",
+					 __func__, ops->mode);
+			return -EINVAL;
+		}
+		if ((ops->len % mtd->writesize) != 0) {
+			pr_err("%s: unsupported ops->len, %d\n",
+					__func__, ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if ((ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len, "
+				"%d for MTD_OPS_RAW mode\n",
+				 __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if (ops->datbuf == NULL) {
+		pr_err("%s: unsupported ops->datbuf == NULL\n", __func__);
+		return -EINVAL;
+	}
+
+	if (ops->mode != MTD_OPS_RAW && ops->ooblen != 0 && ops->ooboffs != 0) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n",
+		       __func__, ops->ooboffs);
+		return -EINVAL;
+	}
+
+	if (ops->datbuf) {
+		data_dma_addr_curr = data_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->datbuf,
+					 ops->len, DMA_TO_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("msm_nand_write_oob_dualnandc:"
+				"failed to get dma addr "
+			       "for %p\n", ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		oob_dma_addr_curr = oob_dma_addr =
+			msm_nand_dma_map(chip->dev, ops->oobbuf,
+					 ops->ooblen, DMA_TO_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("msm_nand_write_oob_dualnandc:"
+				"failed to get dma addr "
+			       "for %p\n", ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+	if (ops->mode != MTD_OPS_RAW)
+		page_count = ops->len / mtd->writesize;
+	else
+		page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	wait_event(chip->wait_queue, (dma_buffer =
+			msm_nand_get_dma_buffer(chip, sizeof(*dma_buffer))));
+
+	if (chip->CFG1 & CFG1_WIDE_FLASH)
+		cw_offset >>= 1;
+
+	dma_buffer->data.ebi2_chip_select_cfg0 = 0x00000805;
+	dma_buffer->data.adm_mux_data_ack_req_nc01 = 0x00000A3C;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc01  = 0x0000053C;
+	dma_buffer->data.adm_mux_data_ack_req_nc10 = 0x00000F28;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc10  = 0x00000F14;
+	dma_buffer->data.adm_default_mux = 0x00000FC0;
+	dma_buffer->data.default_ebi2_chip_select_cfg0 = 0x00000801;
+	dma_buffer->data.nc01_flash_dev_cmd_vld = 0x9;
+	dma_buffer->data.nc10_flash_dev_cmd0 = 0x1085D060;
+	dma_buffer->data.nc01_flash_dev_cmd_vld_default = 0x1D;
+	dma_buffer->data.nc10_flash_dev_cmd0_default = 0x1080D060;
+	dma_buffer->data.clrfstatus = 0x00000020;
+	dma_buffer->data.clrrstatus = 0x000000C0;
+
+	while (page_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		if (ops->mode != MTD_OPS_RAW) {
+			dma_buffer->data.cfg0 = ((chip->CFG0 & ~(7U << 6))
+				& ~(1 << 4)) | ((((cwperpage >> 1)-1)) << 6);
+			dma_buffer->data.cfg1 = chip->CFG1;
+			if (enable_bch_ecc)
+				dma_buffer->data.eccbchcfg = chip->ecc_bch_cfg;
+		} else {
+			dma_buffer->data.cfg0 = ((chip->CFG0_RAW &
+			~(7U << 6)) & ~(1 << 4)) | (((cwperpage >> 1)-1) << 6);
+			dma_buffer->data.cfg1 = chip->CFG1_RAW |
+					(chip->CFG1 & CFG1_WIDE_FLASH);
+		}
+
+		/* Disables the automatic issuing of the read
+		 * status command for first NAND controller.
+		 */
+		if (!interleave_enable)
+			dma_buffer->data.cfg0_nc01 = dma_buffer->data.cfg0
+							| (1 << 4);
+		else
+			dma_buffer->data.cfg0 |= (1 << 4);
+
+		dma_buffer->data.cmd = MSM_NAND_CMD_PRG_PAGE;
+		dma_buffer->data.chipsel_cs0 = (1<<4) | 4;
+		dma_buffer->data.chipsel_cs1 = (1<<4) | 5;
+
+		/* GO bit for the EXEC register */
+		dma_buffer->data.exec = 1;
+
+		if (!interleave_enable) {
+			dma_buffer->data.nandc01_addr0 = (page << 16) | 0x0;
+			/* NC10 ADDR0 points to the next code word */
+			dma_buffer->data.nandc10_addr0 =
+					(page << 16) | cw_offset;
+		} else {
+			dma_buffer->data.nandc01_addr0 =
+			dma_buffer->data.nandc10_addr0 = (page << 16) | 0x0;
+		}
+		/* ADDR1 */
+		dma_buffer->data.nandc11_addr1 = (page >> 16) & 0xff;
+
+		BUILD_BUG_ON(16 != ARRAY_SIZE(dma_buffer->data.flash_status));
+
+		for (n = 0; n < cwperpage; n++) {
+			/* status return words */
+			dma_buffer->data.flash_status[n] = 0xeeeeeeee;
+
+			if (n == 0) {
+				if (!interleave_enable) {
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.nc01_flash_dev_cmd_vld);
+					cmd->dst = NC01(MSM_NAND_DEV_CMD_VLD);
+					cmd->len = 4;
+					cmd++;
+
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nc10_flash_dev_cmd0);
+					cmd->dst = NC10(MSM_NAND_DEV_CMD0);
+					cmd->len = 4;
+					cmd++;
+
+					/* common settings for both NC01 & NC10
+					 * NC01, NC10 --> ADDR1 / CHIPSEL
+					 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc11_addr1);
+					cmd->dst = NC11(MSM_NAND_ADDR1);
+					cmd->len = 8;
+					cmd++;
+
+					/* Disables the automatic issue of the
+					 * read status command after the write
+					 * operation.
+					 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cfg0_nc01);
+					cmd->dst = NC01(MSM_NAND_DEV0_CFG0);
+					cmd->len = 4;
+					cmd++;
+
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cfg0);
+					cmd->dst = NC10(MSM_NAND_DEV0_CFG0);
+					cmd->len = 4;
+					cmd++;
+
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cfg1);
+					cmd->dst = NC11(MSM_NAND_DEV0_CFG1);
+					if (enable_bch_ecc)
+						cmd->len = 8;
+					else
+						cmd->len = 4;
+					cmd++;
+				} else {
+					/* enable CS1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.ebi2_chip_select_cfg0);
+					cmd->dst = EBI2_CHIP_SELECT_CFG0;
+					cmd->len = 4;
+					cmd++;
+
+					/* NC11 --> ADDR1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc11_addr1);
+					cmd->dst = NC11(MSM_NAND_ADDR1);
+					cmd->len = 4;
+					cmd++;
+
+					/* Enable CS0 for NC01 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.chipsel_cs0);
+					cmd->dst =
+					NC01(MSM_NAND_FLASH_CHIP_SELECT);
+					cmd->len = 4;
+					cmd++;
+
+					/* Enable CS1 for NC10 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.chipsel_cs1);
+					cmd->dst =
+					NC10(MSM_NAND_FLASH_CHIP_SELECT);
+					cmd->len = 4;
+					cmd++;
+
+					/* config DEV0_CFG0 & CFG1 for CS0 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cfg0);
+					cmd->dst = NC01(MSM_NAND_DEV0_CFG0);
+					cmd->len = 8;
+					cmd++;
+
+					/* config DEV1_CFG0 & CFG1 for CS1 */
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.cfg0);
+					cmd->dst = NC10(MSM_NAND_DEV1_CFG0);
+					cmd->len = 8;
+					cmd++;
+				}
+
+				dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.ecccfg);
+				cmd->dst = NC11(MSM_NAND_EBI2_ECC_BUF_CFG);
+				cmd->len = 4;
+				cmd++;
+
+				/* NC01 --> ADDR0 */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.nandc01_addr0);
+				cmd->dst = NC01(MSM_NAND_ADDR0);
+				cmd->len = 4;
+				cmd++;
+
+				/* NC10 --> ADDR0 */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.nandc10_addr0);
+				cmd->dst = NC10(MSM_NAND_ADDR0);
+				cmd->len = 4;
+				cmd++;
+			}
+
+			if (n % 2 == 0) {
+				/* MASK CMD ACK/REQ --> NC10 (0xF14)*/
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.adm_mux_cmd_ack_req_nc10);
+				cmd->dst = EBI2_NAND_ADM_MUX;
+				cmd->len = 4;
+				cmd++;
+
+				/* CMD */
+				cmd->cmd = DST_CRCI_NAND_CMD;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cmd);
+				cmd->dst = NC01(MSM_NAND_FLASH_CMD);
+				cmd->len = 4;
+				cmd++;
+			} else {
+				/* MASK CMD ACK/REQ --> NC01 (0x53C)*/
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.adm_mux_cmd_ack_req_nc01);
+				cmd->dst = EBI2_NAND_ADM_MUX;
+				cmd->len = 4;
+				cmd++;
+
+				/* CMD */
+				cmd->cmd = DST_CRCI_NAND_CMD;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.cmd);
+				cmd->dst = NC10(MSM_NAND_FLASH_CMD);
+				cmd->len = 4;
+				cmd++;
+			}
+
+			if (ops->mode != MTD_OPS_RAW)
+				sectordatawritesize = (n < (cwperpage - 1)) ?
+					516 : (512 - ((cwperpage - 1) << 2));
+			else
+				sectordatawritesize = chip->cw_size;
+
+			cmd->cmd = 0;
+			cmd->src = data_dma_addr_curr;
+			data_dma_addr_curr += sectordatawritesize;
+
+			if (n % 2 == 0)
+				cmd->dst = NC01(MSM_NAND_FLASH_BUFFER);
+			else
+				cmd->dst = NC10(MSM_NAND_FLASH_BUFFER);
+			cmd->len = sectordatawritesize;
+			cmd++;
+
+			if (ops->oobbuf) {
+				if (n == (cwperpage - 1)) {
+					cmd->cmd = 0;
+					cmd->src = oob_dma_addr_curr;
+					cmd->dst = NC10(MSM_NAND_FLASH_BUFFER) +
+						(512 - ((cwperpage - 1) << 2));
+					if ((cwperpage << 2) < oob_len)
+						cmd->len = (cwperpage << 2);
+					else
+						cmd->len = oob_len;
+					oob_dma_addr_curr += cmd->len;
+					oob_len -= cmd->len;
+					if (cmd->len > 0)
+						cmd++;
+				}
+				if (ops->mode != MTD_OPS_AUTO_OOB) {
+					/* skip ecc bytes in oobbuf */
+					if (oob_len < chip->ecc_parity_bytes) {
+						oob_dma_addr_curr +=
+							chip->ecc_parity_bytes;
+						oob_len -=
+							chip->ecc_parity_bytes;
+					} else {
+						oob_dma_addr_curr += oob_len;
+						oob_len = 0;
+					}
+				}
+			}
+
+			if (n % 2 == 0) {
+				if (n != 0) {
+					/* MASK DATA ACK/REQ --> NC01 (0xA3C)*/
+					cmd->cmd = 0;
+					cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->
+					data.adm_mux_data_ack_req_nc01);
+					cmd->dst = EBI2_NAND_ADM_MUX;
+					cmd->len = 4;
+					cmd++;
+
+					/* block on data ready from NC10, then
+					* read the status register
+					*/
+					cmd->cmd = SRC_CRCI_NAND_DATA;
+					cmd->src = NC10(MSM_NAND_FLASH_STATUS);
+					cmd->dst = msm_virt_to_dma(chip,
+					&dma_buffer->data.flash_status[n-1]);
+					cmd->len = 4;
+					cmd++;
+				}
+				/* kick the NC01 execute register */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.exec);
+				cmd->dst = NC01(MSM_NAND_EXEC_CMD);
+				cmd->len = 4;
+				cmd++;
+			} else {
+				/* MASK DATA ACK/REQ --> NC10 (0xF28)*/
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.adm_mux_data_ack_req_nc10);
+				cmd->dst = EBI2_NAND_ADM_MUX;
+				cmd->len = 4;
+				cmd++;
+
+				/* block on data ready from NC01, then
+				 * read the status register
+				 */
+				cmd->cmd = SRC_CRCI_NAND_DATA;
+				cmd->src = NC01(MSM_NAND_FLASH_STATUS);
+				cmd->dst = msm_virt_to_dma(chip,
+				&dma_buffer->data.flash_status[n-1]);
+				cmd->len = 4;
+				cmd++;
+
+				/* kick the execute register */
+				cmd->cmd = 0;
+				cmd->src =
+				msm_virt_to_dma(chip, &dma_buffer->data.exec);
+				cmd->dst = NC10(MSM_NAND_EXEC_CMD);
+				cmd->len = 4;
+				cmd++;
+			}
+		}
+
+		/* MASK DATA ACK/REQ --> NC01 (0xA3C)*/
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.adm_mux_data_ack_req_nc01);
+		cmd->dst = EBI2_NAND_ADM_MUX;
+		cmd->len = 4;
+		cmd++;
+
+		/* we should process outstanding request */
+		/* block on data ready, then
+		 * read the status register
+		 */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = NC10(MSM_NAND_FLASH_STATUS);
+		cmd->dst = msm_virt_to_dma(chip,
+			     &dma_buffer->data.flash_status[n-1]);
+		cmd->len = 4;
+		cmd++;
+
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrfstatus);
+		cmd->dst = NC11(MSM_NAND_FLASH_STATUS);
+		cmd->len = 4;
+		cmd++;
+
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrrstatus);
+		cmd->dst = NC11(MSM_NAND_READ_STATUS);
+		cmd->len = 4;
+		cmd++;
+
+		/* MASK DATA ACK/REQ --> NC01 (0xFC0)*/
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip,
+				&dma_buffer->data.adm_default_mux);
+		cmd->dst = EBI2_NAND_ADM_MUX;
+		cmd->len = 4;
+		cmd++;
+
+		if (!interleave_enable) {
+			/* setting to defalut values back */
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.nc01_flash_dev_cmd_vld_default);
+			cmd->dst = NC01(MSM_NAND_DEV_CMD_VLD);
+			cmd->len = 4;
+			cmd++;
+
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.nc10_flash_dev_cmd0_default);
+			cmd->dst = NC10(MSM_NAND_DEV_CMD0);
+			cmd->len = 4;
+			cmd++;
+		} else {
+			/* disable CS1 */
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.default_ebi2_chip_select_cfg0);
+			cmd->dst = EBI2_CHIP_SELECT_CFG0;
+			cmd->len = 4;
+			cmd++;
+		}
+
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+		BUILD_BUG_ON(16 * 6 + 18 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmdptr =
+		((msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP);
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(
+				msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+		mb();
+
+		/* if any of the writes failed (0x10), or there was a
+		 * protection violation (0x100), or the program success
+		 * bit (0x80) is unset, we lose
+		 */
+		err = 0;
+		for (n = 0; n < cwperpage; n++) {
+			if (dma_buffer->data.flash_status[n] & 0x110) {
+				err = -EIO;
+				break;
+			}
+			if (!(dma_buffer->data.flash_status[n] & 0x80)) {
+				err = -EIO;
+				break;
+			}
+		}
+		/* check for flash status busy for the last codeword */
+		if (!interleave_enable)
+			if (!(dma_buffer->data.flash_status[cwperpage - 1]
+								& 0x20)) {
+				err = -EIO;
+				break;
+			}
+#if VERBOSE
+	for (n = 0; n < cwperpage; n++) {
+		if (n%2) {
+			pr_info("NC10: write pg %d: flash_status[%d] = %x\n",
+				page, n, dma_buffer->data.flash_status[n]);
+		} else {
+			pr_info("NC01: write pg %d: flash_status[%d] = %x\n",
+				page, n, dma_buffer->data.flash_status[n]);
+		}
+	}
+#endif
+		if (err)
+			break;
+		pages_written++;
+		page++;
+	}
+	if (ops->mode != MTD_OPS_RAW)
+		ops->retlen = mtd->writesize * pages_written;
+	else
+		ops->retlen = (mtd->writesize + mtd->oobsize) * pages_written;
+
+	ops->oobretlen = ops->ooblen - oob_len;
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (ops->oobbuf)
+		dma_unmap_page(chip->dev, oob_dma_addr,
+				 ops->ooblen, DMA_TO_DEVICE);
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf)
+		dma_unmap_page(chip->dev, data_dma_addr, ops->len,
+				DMA_TO_DEVICE);
+	if (err)
+		pr_err("msm_nand_write_oob_dualnandc %llx %x %x failed %d\n",
+		       to, ops->len, ops->ooblen, err);
+
+#if VERBOSE
+	pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+			__func__, err, ops->retlen, ops->oobretlen);
+
+	pr_info("==================================================="
+			"==========\n");
+#endif
+	return err;
+}
+
+static int msm_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
+			  size_t *retlen, const u_char *buf)
+{
+        int ret;
+	struct mtd_oob_ops ops;
+	int (*write_oob)(struct mtd_info *, loff_t, struct mtd_oob_ops *);
+
+	if (!dual_nand_ctlr_present)
+		write_oob = msm_nand_write_oob;
+	else
+		write_oob = msm_nand_write_oob_dualnandc;
+
+	ops.mode = MTD_OPS_PLACE_OOB;
+	ops.retlen = 0;
+	ops.ooblen = 0;
+	ops.oobbuf = NULL;
+	ret = 0;
+	*retlen = 0;
+
+	if (!virt_addr_valid(buf) &&
+	    ((to | len) & (mtd->writesize - 1)) == 0 &&
+	    ((unsigned long) buf & ~PAGE_MASK) + len > PAGE_SIZE) {
+		/*
+		 * Handle writing of large size write buffer in vmalloc
+		 * address space that does not fit in an MMU page.
+		 * The destination address must be on page boundary,
+		 * and the size must be multiple of NAND page size.
+		 * Writing partial page is not supported.
+		 */
+		ops.len = mtd->writesize;
+
+		for (;;) {
+			ops.datbuf = (uint8_t *) buf;
+
+			ret = write_oob(mtd, to, &ops);
+			if (ret < 0)
+				break;
+
+			len -= mtd->writesize;
+			*retlen += mtd->writesize;
+			if (len == 0)
+				break;
+
+			buf += mtd->writesize;
+			to += mtd->writesize;
+		}
+	} else {
+		ops.len = len;
+		ops.datbuf = (uint8_t *) buf;
+		ret = write_oob(mtd, to, &ops);
+		*retlen = ops.retlen;
+	}
+
+	return ret;
+}
+
+static int
+msm_nand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	int err;
+	struct msm_nand_chip *chip = mtd->priv;
+	struct {
+		dmov_s cmd[6];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t exec;
+			uint32_t flash_status;
+			uint32_t clrfstatus;
+			uint32_t clrrstatus;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned page = 0;
+
+	if (mtd->writesize == 2048)
+		page = instr->addr >> 11;
+
+	if (mtd->writesize == 4096)
+		page = instr->addr >> 12;
+
+	if (instr->addr & (mtd->erasesize - 1)) {
+		pr_err("%s: unsupported erase address, 0x%llx\n",
+		       __func__, instr->addr);
+		return -EINVAL;
+	}
+	if (instr->len != mtd->erasesize) {
+		pr_err("%s: unsupported erase len, %lld\n",
+		       __func__, instr->len);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	cmd = dma_buffer->cmd;
+
+	dma_buffer->data.cmd = MSM_NAND_CMD_BLOCK_ERASE;
+	dma_buffer->data.addr0 = page;
+	dma_buffer->data.addr1 = 0;
+	dma_buffer->data.chipsel = 0 | 4;
+	dma_buffer->data.exec = 1;
+	dma_buffer->data.flash_status = 0xeeeeeeee;
+	dma_buffer->data.cfg0 = chip->CFG0 & (~(7 << 6));  /* CW_PER_PAGE = 0 */
+	dma_buffer->data.cfg1 = chip->CFG1;
+	dma_buffer->data.clrfstatus = 0x00000020;
+	dma_buffer->data.clrrstatus = 0x000000C0;
+
+	cmd->cmd = DST_CRCI_NAND_CMD | CMD_OCB;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = MSM_NAND_FLASH_CMD;
+	cmd->len = 16;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = MSM_NAND_DEV0_CFG0;
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = MSM_NAND_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_FLASH_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.flash_status);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrfstatus);
+	cmd->dst = MSM_NAND_FLASH_STATUS;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = CMD_OCU | CMD_LC;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrrstatus);
+	cmd->dst = MSM_NAND_READ_STATUS;
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(5 != ARRAY_SIZE(dma_buffer->cmd) - 1);
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmdptr =
+		(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(
+		chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	/* we fail if there was an operation error, a mpu error, or the
+	 * erase success bit was not set.
+	 */
+
+	if (dma_buffer->data.flash_status & 0x110 ||
+			!(dma_buffer->data.flash_status & 0x80))
+		err = -EIO;
+	else
+		err = 0;
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+	if (err) {
+		pr_err("%s: erase failed, 0x%llx\n", __func__, instr->addr);
+		instr->fail_addr = instr->addr;
+		instr->state = MTD_ERASE_FAILED;
+	} else {
+		instr->state = MTD_ERASE_DONE;
+		instr->fail_addr = 0xffffffff;
+		mtd_erase_callback(instr);
+	}
+	return err;
+}
+
+static int
+msm_nand_erase_dualnandc(struct mtd_info *mtd, struct erase_info *instr)
+{
+	int err;
+	struct msm_nand_chip *chip = mtd->priv;
+	struct {
+		dmov_s cmd[18];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel_cs0;
+			uint32_t chipsel_cs1;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t exec;
+			uint32_t ecccfg;
+			uint32_t ebi2_chip_select_cfg0;
+			uint32_t adm_mux_data_ack_req_nc01;
+			uint32_t adm_mux_cmd_ack_req_nc01;
+			uint32_t adm_mux_data_ack_req_nc10;
+			uint32_t adm_mux_cmd_ack_req_nc10;
+			uint32_t adm_default_mux;
+			uint32_t default_ebi2_chip_select_cfg0;
+			uint32_t nc01_flash_dev_cmd0;
+			uint32_t nc01_flash_dev_cmd0_default;
+			uint32_t flash_status[2];
+			uint32_t clrfstatus;
+			uint32_t clrrstatus;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	unsigned page = 0;
+
+	if (mtd->writesize == 2048)
+		page = instr->addr >> 11;
+
+	if (mtd->writesize == 4096)
+		page = instr->addr >> 12;
+
+	if (mtd->writesize == 8192)
+		page = (instr->addr >> 1) >> 12;
+
+	if (instr->addr & (mtd->erasesize - 1)) {
+		pr_err("%s: unsupported erase address, 0x%llx\n",
+		       __func__, instr->addr);
+		return -EINVAL;
+	}
+	if (instr->len != mtd->erasesize) {
+		pr_err("%s: unsupported erase len, %lld\n",
+		       __func__, instr->len);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue,
+		   (dma_buffer = msm_nand_get_dma_buffer(
+			    chip, sizeof(*dma_buffer))));
+
+	cmd = dma_buffer->cmd;
+
+	dma_buffer->data.cmd = MSM_NAND_CMD_BLOCK_ERASE;
+	dma_buffer->data.addr0 = page;
+	dma_buffer->data.addr1 = 0;
+	dma_buffer->data.chipsel_cs0 = (1<<4) | 4;
+	dma_buffer->data.chipsel_cs1 = (1<<4) | 5;
+	dma_buffer->data.exec = 1;
+	dma_buffer->data.flash_status[0] = 0xeeeeeeee;
+	dma_buffer->data.flash_status[1] = 0xeeeeeeee;
+	dma_buffer->data.cfg0 = chip->CFG0 & (~(7 << 6));  /* CW_PER_PAGE = 0 */
+	dma_buffer->data.cfg1 = chip->CFG1;
+	dma_buffer->data.clrfstatus = 0x00000020;
+	dma_buffer->data.clrrstatus = 0x000000C0;
+
+	dma_buffer->data.ebi2_chip_select_cfg0 = 0x00000805;
+	dma_buffer->data.adm_mux_data_ack_req_nc01 = 0x00000A3C;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc01  = 0x0000053C;
+	dma_buffer->data.adm_mux_data_ack_req_nc10 = 0x00000F28;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc10  = 0x00000F14;
+	dma_buffer->data.adm_default_mux = 0x00000FC0;
+	dma_buffer->data.default_ebi2_chip_select_cfg0 = 0x00000801;
+
+	/* enable CS1 */
+	cmd->cmd = 0 | CMD_OCB;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.ebi2_chip_select_cfg0);
+	cmd->dst = EBI2_CHIP_SELECT_CFG0;
+	cmd->len = 4;
+	cmd++;
+
+	/* erase CS0 block now !!! */
+	/* 0xF14 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_mux_cmd_ack_req_nc10);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = NC01(MSM_NAND_FLASH_CMD);
+	cmd->len = 16;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = NC01(MSM_NAND_DEV0_CFG0);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = NC01(MSM_NAND_EXEC_CMD);
+	cmd->len = 4;
+	cmd++;
+
+	/* 0xF28 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_mux_data_ack_req_nc10);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = NC01(MSM_NAND_FLASH_STATUS);
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.flash_status[0]);
+	cmd->len = 4;
+	cmd++;
+
+	/* erase CS1 block now !!! */
+	/* 0x53C */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			       &dma_buffer->data.adm_mux_cmd_ack_req_nc01);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = NC10(MSM_NAND_FLASH_CMD);
+	cmd->len = 12;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.chipsel_cs1);
+	cmd->dst = NC10(MSM_NAND_FLASH_CHIP_SELECT);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = NC10(MSM_NAND_DEV1_CFG0);
+	cmd->len = 8;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = NC10(MSM_NAND_EXEC_CMD);
+	cmd->len = 4;
+	cmd++;
+
+	/* 0xA3C */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			     &dma_buffer->data.adm_mux_data_ack_req_nc01);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = NC10(MSM_NAND_FLASH_STATUS);
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.flash_status[1]);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrfstatus);
+	cmd->dst = NC11(MSM_NAND_FLASH_STATUS);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.clrrstatus);
+	cmd->dst = NC11(MSM_NAND_READ_STATUS);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_default_mux);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	/* disable CS1 */
+	cmd->cmd = CMD_OCU | CMD_LC;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.default_ebi2_chip_select_cfg0);
+	cmd->dst = EBI2_CHIP_SELECT_CFG0;
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(17 != ARRAY_SIZE(dma_buffer->cmd) - 1);
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+
+	dma_buffer->cmdptr =
+		(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(
+		chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	/* we fail if there was an operation error, a mpu error, or the
+	 * erase success bit was not set.
+	 */
+
+	if (dma_buffer->data.flash_status[0] & 0x110 ||
+			!(dma_buffer->data.flash_status[0] & 0x80) ||
+			dma_buffer->data.flash_status[1] & 0x110 ||
+			!(dma_buffer->data.flash_status[1] & 0x80))
+		err = -EIO;
+	else
+		err = 0;
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+	if (err) {
+		pr_err("%s: erase failed, 0x%llx\n", __func__, instr->addr);
+		instr->fail_addr = instr->addr;
+		instr->state = MTD_ERASE_FAILED;
+	} else {
+		instr->state = MTD_ERASE_DONE;
+		instr->fail_addr = 0xffffffff;
+		mtd_erase_callback(instr);
+	}
+	return err;
+}
+
+static int
+msm_nand_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+	int ret;
+	struct {
+		dmov_s cmd[5];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t eccbchcfg;
+			uint32_t exec;
+			uint32_t ecccfg;
+			struct {
+				uint32_t flash_status;
+				uint32_t buffer_status;
+			} result;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	uint8_t *buf;
+	unsigned page = 0;
+	unsigned cwperpage;
+
+	if (mtd->writesize == 2048)
+		page = ofs >> 11;
+
+	if (mtd->writesize == 4096)
+		page = ofs >> 12;
+
+	cwperpage = (mtd->writesize >> 9);
+
+	/* Check for invalid offset */
+	if (ofs > mtd->size)
+		return -EINVAL;
+	if (ofs & (mtd->erasesize - 1)) {
+		pr_err("%s: unsupported block address, 0x%x\n",
+			 __func__, (uint32_t)ofs);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue,
+		(dma_buffer = msm_nand_get_dma_buffer(chip ,
+					 sizeof(*dma_buffer) + 4)));
+	buf = (uint8_t *)dma_buffer + sizeof(*dma_buffer);
+
+	/* Read 4 bytes starting from the bad block marker location
+	 * in the last code word of the page
+	 */
+
+	cmd = dma_buffer->cmd;
+
+	dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
+	dma_buffer->data.cfg0 = chip->CFG0_RAW & ~(7U << 6);
+	dma_buffer->data.cfg1 = chip->CFG1_RAW |
+				(chip->CFG1 & CFG1_WIDE_FLASH);
+	if (enable_bch_ecc)
+		dma_buffer->data.eccbchcfg = chip->ecc_bch_cfg;
+
+	if (chip->CFG1 & CFG1_WIDE_FLASH)
+		dma_buffer->data.addr0 = (page << 16) |
+			((chip->cw_size * (cwperpage-1)) >> 1);
+	else
+		dma_buffer->data.addr0 = (page << 16) |
+			(chip->cw_size * (cwperpage-1));
+
+	dma_buffer->data.addr1 = (page >> 16) & 0xff;
+	dma_buffer->data.chipsel = 0 | 4;
+
+	dma_buffer->data.exec = 1;
+
+	dma_buffer->data.result.flash_status = 0xeeeeeeee;
+	dma_buffer->data.result.buffer_status = 0xeeeeeeee;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = MSM_NAND_FLASH_CMD;
+	cmd->len = 16;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = MSM_NAND_DEV0_CFG0;
+	if (enable_bch_ecc)
+		cmd->len = 12;
+	else
+		cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = MSM_NAND_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_FLASH_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.result);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = MSM_NAND_FLASH_BUFFER +
+	(mtd->writesize - (chip->cw_size * (cwperpage-1)));
+	cmd->dst = msm_virt_to_dma(chip, buf);
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(5 != ARRAY_SIZE(dma_buffer->cmd));
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip,
+				dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	ret = 0;
+	if (dma_buffer->data.result.flash_status & 0x110)
+		ret = -EIO;
+
+	if (!ret) {
+		/* Check for bad block marker byte */
+		if (chip->CFG1 & CFG1_WIDE_FLASH) {
+			if (buf[0] != 0xFF || buf[1] != 0xFF)
+				ret = 1;
+		} else {
+			if (buf[0] != 0xFF)
+				ret = 1;
+		}
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer) + 4);
+	return ret;
+}
+
+static int
+msm_nand_block_isbad_dualnandc(struct mtd_info *mtd, loff_t ofs)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+	int ret;
+	struct {
+		dmov_s cmd[18];
+		unsigned cmdptr;
+		struct {
+			uint32_t cmd;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t chipsel_cs0;
+			uint32_t chipsel_cs1;
+			uint32_t cfg0;
+			uint32_t cfg1;
+			uint32_t exec;
+			uint32_t ecccfg;
+			uint32_t ebi2_chip_select_cfg0;
+			uint32_t adm_mux_data_ack_req_nc01;
+			uint32_t adm_mux_cmd_ack_req_nc01;
+			uint32_t adm_mux_data_ack_req_nc10;
+			uint32_t adm_mux_cmd_ack_req_nc10;
+			uint32_t adm_default_mux;
+			uint32_t default_ebi2_chip_select_cfg0;
+			struct {
+				uint32_t flash_status;
+				uint32_t buffer_status;
+			} result[2];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+	uint8_t *buf01;
+	uint8_t *buf10;
+	unsigned page = 0;
+	unsigned cwperpage;
+
+	if (mtd->writesize == 2048)
+		page = ofs >> 11;
+
+	if (mtd->writesize == 4096)
+		page = ofs >> 12;
+
+	if (mtd->writesize == 8192)
+		page = (ofs >> 1) >> 12;
+
+	cwperpage = ((mtd->writesize >> 1) >> 9);
+
+	/* Check for invalid offset */
+	if (ofs > mtd->size)
+		return -EINVAL;
+	if (ofs & (mtd->erasesize - 1)) {
+		pr_err("%s: unsupported block address, 0x%x\n",
+			 __func__, (uint32_t)ofs);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue,
+		(dma_buffer = msm_nand_get_dma_buffer(chip ,
+					 sizeof(*dma_buffer) + 8)));
+	buf01 = (uint8_t *)dma_buffer + sizeof(*dma_buffer);
+	buf10 = buf01 + 4;
+
+	/* Read 4 bytes starting from the bad block marker location
+	 * in the last code word of the page
+	 */
+	cmd = dma_buffer->cmd;
+
+	dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
+	dma_buffer->data.cfg0 = chip->CFG0_RAW & ~(7U << 6);
+	dma_buffer->data.cfg1 = chip->CFG1_RAW |
+				(chip->CFG1 & CFG1_WIDE_FLASH);
+
+	if (chip->CFG1 & CFG1_WIDE_FLASH)
+		dma_buffer->data.addr0 = (page << 16) |
+			((528*(cwperpage-1)) >> 1);
+	else
+		dma_buffer->data.addr0 = (page << 16) |
+			(528*(cwperpage-1));
+
+	dma_buffer->data.addr1 = (page >> 16) & 0xff;
+	dma_buffer->data.chipsel_cs0 = (1<<4) | 4;
+	dma_buffer->data.chipsel_cs1 = (1<<4) | 5;
+
+	dma_buffer->data.exec = 1;
+
+	dma_buffer->data.result[0].flash_status = 0xeeeeeeee;
+	dma_buffer->data.result[0].buffer_status = 0xeeeeeeee;
+	dma_buffer->data.result[1].flash_status = 0xeeeeeeee;
+	dma_buffer->data.result[1].buffer_status = 0xeeeeeeee;
+
+	dma_buffer->data.ebi2_chip_select_cfg0 = 0x00000805;
+	dma_buffer->data.adm_mux_data_ack_req_nc01 = 0x00000A3C;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc01  = 0x0000053C;
+	dma_buffer->data.adm_mux_data_ack_req_nc10 = 0x00000F28;
+	dma_buffer->data.adm_mux_cmd_ack_req_nc10  = 0x00000F14;
+	dma_buffer->data.adm_default_mux = 0x00000FC0;
+	dma_buffer->data.default_ebi2_chip_select_cfg0 = 0x00000801;
+
+	/* Reading last code word from NC01 */
+	/* enable CS1 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.ebi2_chip_select_cfg0);
+	cmd->dst = EBI2_CHIP_SELECT_CFG0;
+	cmd->len = 4;
+	cmd++;
+
+	/* 0xF14 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_mux_cmd_ack_req_nc10);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = NC01(MSM_NAND_FLASH_CMD);
+	cmd->len = 16;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = NC01(MSM_NAND_DEV0_CFG0);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = NC01(MSM_NAND_EXEC_CMD);
+	cmd->len = 4;
+	cmd++;
+
+	/* 0xF28 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_mux_data_ack_req_nc10);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = NC01(MSM_NAND_FLASH_STATUS);
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.result[0]);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = NC01(MSM_NAND_FLASH_BUFFER) + ((mtd->writesize >> 1) -
+							(528*(cwperpage-1)));
+	cmd->dst = msm_virt_to_dma(chip, buf01);
+	cmd->len = 4;
+	cmd++;
+
+	/* Reading last code word from NC10 */
+	/* 0x53C */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+	&dma_buffer->data.adm_mux_cmd_ack_req_nc01);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = NC10(MSM_NAND_FLASH_CMD);
+	cmd->len = 12;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.chipsel_cs1);
+	cmd->dst = NC10(MSM_NAND_FLASH_CHIP_SELECT);
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
+	cmd->dst = NC10(MSM_NAND_DEV1_CFG0);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = NC10(MSM_NAND_EXEC_CMD);
+	cmd->len = 4;
+	cmd++;
+
+	/* A3C */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_mux_data_ack_req_nc01);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = NC10(MSM_NAND_FLASH_STATUS);
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.result[1]);
+	cmd->len = 8;
+	cmd++;
+
+	cmd->cmd = 0;
+	cmd->src = NC10(MSM_NAND_FLASH_BUFFER) + ((mtd->writesize >> 1) -
+							(528*(cwperpage-1)));
+	cmd->dst = msm_virt_to_dma(chip, buf10);
+	cmd->len = 4;
+	cmd++;
+
+	/* FC0 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.adm_default_mux);
+	cmd->dst = EBI2_NAND_ADM_MUX;
+	cmd->len = 4;
+	cmd++;
+
+	/* disble CS1 */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip,
+			&dma_buffer->data.ebi2_chip_select_cfg0);
+	cmd->dst = EBI2_CHIP_SELECT_CFG0;
+	cmd->len = 4;
+	cmd++;
+
+	BUILD_BUG_ON(18 != ARRAY_SIZE(dma_buffer->cmd));
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip,
+				dma_buffer->cmd) >> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST |
+		DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
+	mb();
+
+	ret = 0;
+	if ((dma_buffer->data.result[0].flash_status & 0x110) ||
+			(dma_buffer->data.result[1].flash_status & 0x110))
+		ret = -EIO;
+
+	if (!ret) {
+		/* Check for bad block marker byte for NC01 & NC10 */
+		if (chip->CFG1 & CFG1_WIDE_FLASH) {
+			if ((buf01[0] != 0xFF || buf01[1] != 0xFF) ||
+				(buf10[0] != 0xFF || buf10[1] != 0xFF))
+				ret = 1;
+		} else {
+			if (buf01[0] != 0xFF || buf10[0] != 0xFF)
+				ret = 1;
+		}
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer) + 8);
+	return ret;
+}
+
+static int
+msm_nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct mtd_oob_ops ops;
+	int ret;
+	uint8_t *buf;
+
+	/* Check for invalid offset */
+	if (ofs > mtd->size)
+		return -EINVAL;
+	if (ofs & (mtd->erasesize - 1)) {
+		pr_err("%s: unsupported block address, 0x%x\n",
+				 __func__, (uint32_t)ofs);
+		return -EINVAL;
+	}
+
+	/*
+	Write all 0s to the first page
+	This will set the BB marker to 0
+	*/
+	buf = page_address(ZERO_PAGE());
+
+	ops.mode = MTD_OPS_RAW;
+	ops.len = mtd->writesize + mtd->oobsize;
+	ops.retlen = 0;
+	ops.ooblen = 0;
+	ops.datbuf = buf;
+	ops.oobbuf = NULL;
+	if (!interleave_enable)
+		ret =  msm_nand_write_oob(mtd, ofs, &ops);
+	else
+		ret = msm_nand_write_oob_dualnandc(mtd, ofs, &ops);
+
+	return ret;
+}
+
+/**
+ * msm_nand_suspend - [MTD Interface] Suspend the msm_nand flash
+ * @param mtd		MTD device structure
+ */
+static int msm_nand_suspend(struct mtd_info *mtd)
+{
+	return 0;
+}
+
+/**
+ * msm_nand_resume - [MTD Interface] Resume the msm_nand flash
+ * @param mtd		MTD device structure
+ */
+static void msm_nand_resume(struct mtd_info *mtd)
+{
+}
+
+struct onenand_information {
+	uint16_t manufacturer_id;
+	uint16_t device_id;
+	uint16_t version_id;
+	uint16_t data_buf_size;
+	uint16_t boot_buf_size;
+	uint16_t num_of_buffers;
+	uint16_t technology;
+};
+
+static struct onenand_information onenand_info;
+static uint32_t nand_sfcmd_mode;
+
+uint32_t flash_onenand_probe(struct msm_nand_chip *chip)
+{
+               struct {
+		dmov_s cmd[7];
+		unsigned cmdptr;
+		struct {
+			uint32_t bcfg;
+			uint32_t cmd;
+			uint32_t exec;
+			uint32_t status;
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+	uint32_t initialsflashcmd = 0;
+
+	initialsflashcmd = flash_rd_reg(chip, MSM_NAND_SFLASHC_CMD);
+
+	if ((initialsflashcmd & 0x10) == 0x10)
+		nand_sfcmd_mode = MSM_NAND_SFCMD_ASYNC;
+	else
+		nand_sfcmd_mode = MSM_NAND_SFCMD_BURST;
+
+	printk(KERN_INFO "SFLASHC Async Mode bit: %x \n", nand_sfcmd_mode);
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	cmd = dma_buffer->cmd;
+
+	dma_buffer->data.bcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+	dma_buffer->data.cmd = SFLASH_PREPCMD(7, 0, 0,
+						MSM_NAND_SFCMD_DATXS,
+						nand_sfcmd_mode,
+						MSM_NAND_SFCMD_REGRD);
+	dma_buffer->data.exec = 1;
+	dma_buffer->data.status = CLEAN_DATA_32;
+	dma_buffer->data.addr0 = (ONENAND_DEVICE_ID << 16) |
+						(ONENAND_MANUFACTURER_ID);
+	dma_buffer->data.addr1 = (ONENAND_DATA_BUFFER_SIZE << 16) |
+						(ONENAND_VERSION_ID);
+	dma_buffer->data.addr2 = (ONENAND_AMOUNT_OF_BUFFERS << 16) |
+						(ONENAND_BOOT_BUFFER_SIZE);
+	dma_buffer->data.addr3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_TECHNOLOGY << 0);
+	dma_buffer->data.data0 = CLEAN_DATA_32;
+	dma_buffer->data.data1 = CLEAN_DATA_32;
+	dma_buffer->data.data2 = CLEAN_DATA_32;
+	dma_buffer->data.data3 = CLEAN_DATA_32;
+
+	/* Enable and configure the SFlash controller */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.bcfg);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on cmd ready and write CMD register */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
+	cmd->dst = MSM_NAND_SFLASHC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Configure the ADDR0 and ADDR1 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+	cmd->dst = MSM_NAND_ADDR0;
+	cmd->len = 8;
+	cmd++;
+
+	/* Configure the ADDR2 and ADDR3 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+	cmd->dst = MSM_NAND_ADDR2;
+	cmd->len = 8;
+	cmd++;
+
+	/* Kick the execute command */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
+	cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on data ready, and read the two status registers */
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_SFLASHC_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.status);
+	cmd->len = 4;
+	cmd++;
+
+	/* Read data registers - valid only if status says success */
+	cmd->cmd = 0;
+	cmd->src = MSM_NAND_GENP_REG0;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+	cmd->len = 16;
+	cmd++;
+
+	BUILD_BUG_ON(7 != ARRAY_SIZE(dma_buffer->cmd));
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+			>> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST
+			| DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+	mb();
+
+	/* Check for errors, protection violations etc */
+	if (dma_buffer->data.status & 0x110) {
+		pr_info("%s: MPU/OP error"
+				"(0x%x) during Onenand probe\n",
+				__func__, dma_buffer->data.status);
+		err = -EIO;
+	} else {
+
+		onenand_info.manufacturer_id =
+			(dma_buffer->data.data0 >> 0) & 0x0000FFFF;
+		onenand_info.device_id =
+			(dma_buffer->data.data0 >> 16) & 0x0000FFFF;
+		onenand_info.version_id =
+			(dma_buffer->data.data1 >> 0) & 0x0000FFFF;
+		onenand_info.data_buf_size =
+			(dma_buffer->data.data1 >> 16) & 0x0000FFFF;
+		onenand_info.boot_buf_size =
+			(dma_buffer->data.data2 >> 0) & 0x0000FFFF;
+		onenand_info.num_of_buffers =
+			(dma_buffer->data.data2 >> 16) & 0x0000FFFF;
+		onenand_info.technology =
+			(dma_buffer->data.data3 >> 0) & 0x0000FFFF;
+
+
+		pr_info("======================================="
+				"==========================\n");
+
+		pr_info("%s: manufacturer_id = 0x%x\n"
+				, __func__, onenand_info.manufacturer_id);
+		pr_info("%s: device_id = 0x%x\n"
+				, __func__, onenand_info.device_id);
+		pr_info("%s: version_id = 0x%x\n"
+				, __func__, onenand_info.version_id);
+		pr_info("%s: data_buf_size = 0x%x\n"
+				, __func__, onenand_info.data_buf_size);
+		pr_info("%s: boot_buf_size = 0x%x\n"
+				, __func__, onenand_info.boot_buf_size);
+		pr_info("%s: num_of_buffers = 0x%x\n"
+				, __func__, onenand_info.num_of_buffers);
+		pr_info("%s: technology = 0x%x\n"
+				, __func__, onenand_info.technology);
+
+		pr_info("======================================="
+				"==========================\n");
+
+		if ((onenand_info.manufacturer_id != 0x00EC)
+			|| ((onenand_info.device_id & 0x0040) != 0x0040)
+			|| (onenand_info.data_buf_size != 0x0800)
+			|| (onenand_info.boot_buf_size != 0x0200)
+			|| (onenand_info.num_of_buffers != 0x0201)
+			|| (onenand_info.technology != 0)) {
+
+			pr_info("%s: Detected an unsupported device\n"
+				, __func__);
+			err = -EIO;
+		}
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	return err;
+}
+
+int msm_onenand_read_oob(struct mtd_info *mtd,
+		loff_t from, struct mtd_oob_ops *ops)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[53];
+		unsigned cmdptr;
+		struct {
+			uint32_t sfbcfg;
+			uint32_t sfcmd[9];
+			uint32_t sfexec;
+			uint32_t sfstat[9];
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+			uint32_t macro[5];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+	int i;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+
+	loff_t from_curr = 0;
+	unsigned page_count;
+	unsigned pages_read = 0;
+
+	uint16_t onenand_startaddr1;
+	uint16_t onenand_startaddr8;
+	uint16_t onenand_startaddr2;
+	uint16_t onenand_startbuffer;
+	uint16_t onenand_sysconfig1;
+	uint16_t controller_status;
+	uint16_t interrupt_status;
+	uint16_t ecc_status;
+#if VERBOSE
+	pr_info("================================================="
+			"================\n");
+	pr_info("%s: from 0x%llx mode %d \ndatbuf 0x%p datlen 0x%x"
+			"\noobbuf 0x%p ooblen 0x%x\n",
+			__func__, from, ops->mode, ops->datbuf, ops->len,
+			ops->oobbuf, ops->ooblen);
+#endif
+	if (!mtd) {
+		pr_err("%s: invalid mtd pointer, 0x%x\n", __func__,
+				(uint32_t)mtd);
+		return -EINVAL;
+	}
+	if (from & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported from, 0x%llx\n", __func__,
+				from);
+		return -EINVAL;
+	}
+
+	if ((ops->mode != MTD_OPS_PLACE_OOB) && (ops->mode != MTD_OPS_AUTO_OOB) &&
+			(ops->mode != MTD_OPS_RAW)) {
+		pr_err("%s: unsupported ops->mode, %d\n", __func__,
+				ops->mode);
+		return -EINVAL;
+	}
+
+	if (((ops->datbuf == NULL) || (ops->len == 0)) &&
+			((ops->oobbuf == NULL) || (ops->ooblen == 0))) {
+		pr_err("%s: incorrect ops fields - nothing to do\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if ((ops->datbuf != NULL) && (ops->len == 0)) {
+		pr_err("%s: data buffer passed but length 0\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if ((ops->oobbuf != NULL) && (ops->ooblen == 0)) {
+		pr_err("%s: oob buffer passed but length 0\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0) {
+			/* when ops->datbuf is NULL, ops->len can be ooblen */
+			pr_err("%s: unsupported ops->len, %d\n", __func__,
+					ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if (ops->datbuf != NULL &&
+			(ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len,"
+				" %d for MTD_OPS_RAW\n", __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if ((ops->mode == MTD_OPS_RAW) && (ops->oobbuf)) {
+		pr_err("%s: unsupported operation, oobbuf pointer "
+				"passed in for RAW mode, %x\n", __func__,
+				(uint32_t)ops->oobbuf);
+		return -EINVAL;
+	}
+
+	if (ops->oobbuf && !ops->datbuf) {
+		page_count = ops->ooblen / ((ops->mode == MTD_OPS_AUTO_OOB) ?
+			mtd->oobavail : mtd->oobsize);
+		if ((page_count == 0) && (ops->ooblen))
+			page_count = 1;
+	} else if (ops->mode != MTD_OPS_RAW)
+			page_count = ops->len / mtd->writesize;
+		else
+			page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	if ((ops->mode == MTD_OPS_PLACE_OOB) && (ops->oobbuf != NULL)) {
+		if (page_count * mtd->oobsize > ops->ooblen) {
+			pr_err("%s: unsupported ops->ooblen for "
+				"PLACE, %d\n", __func__, ops->ooblen);
+			return -EINVAL;
+		}
+	}
+
+	if ((ops->mode == MTD_OPS_PLACE_OOB) && (ops->ooblen != 0) &&
+							(ops->ooboffs != 0)) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n", __func__,
+				ops->ooboffs);
+		return -EINVAL;
+	}
+
+	if (ops->datbuf) {
+		memset(ops->datbuf, 0x55, ops->len);
+		data_dma_addr_curr = data_dma_addr = msm_nand_dma_map(chip->dev,
+				ops->datbuf, ops->len, DMA_FROM_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("%s: failed to get dma addr for %p\n",
+					__func__, ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		memset(ops->oobbuf, 0x55, ops->ooblen);
+		oob_dma_addr_curr = oob_dma_addr = msm_nand_dma_map(chip->dev,
+				ops->oobbuf, ops->ooblen, DMA_FROM_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("%s: failed to get dma addr for %p\n",
+					__func__, ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	from_curr = from;
+
+	while (page_count-- > 0) {
+
+		cmd = dma_buffer->cmd;
+
+		if ((onenand_info.device_id & ONENAND_DEVICE_IS_DDP)
+			&& (from_curr >= (mtd->size>>1))) { /* DDP Device */
+				onenand_startaddr1 = DEVICE_FLASHCORE_1 |
+					(((uint32_t)(from_curr-(mtd->size>>1))
+					/ mtd->erasesize));
+				onenand_startaddr2 = DEVICE_BUFFERRAM_1;
+		} else {
+				onenand_startaddr1 = DEVICE_FLASHCORE_0 |
+				((uint32_t)from_curr / mtd->erasesize) ;
+				onenand_startaddr2 = DEVICE_BUFFERRAM_0;
+		}
+
+		onenand_startaddr8 = (((uint32_t)from_curr &
+				(mtd->erasesize - 1)) / mtd->writesize) << 2;
+		onenand_startbuffer = DATARAM0_0 << 8;
+		onenand_sysconfig1 = (ops->mode == MTD_OPS_RAW) ?
+			ONENAND_SYSCFG1_ECCDIS(nand_sfcmd_mode) :
+			ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode);
+
+		dma_buffer->data.sfbcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+		dma_buffer->data.sfcmd[0] =  SFLASH_PREPCMD(7, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfcmd[1] =  SFLASH_PREPCMD(0, 0, 32,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_INTHI);
+		dma_buffer->data.sfcmd[2] =  SFLASH_PREPCMD(3, 7, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGRD);
+		dma_buffer->data.sfcmd[3] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATRD);
+		dma_buffer->data.sfcmd[4] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATRD);
+		dma_buffer->data.sfcmd[5] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATRD);
+		dma_buffer->data.sfcmd[6] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATRD);
+		dma_buffer->data.sfcmd[7] =  SFLASH_PREPCMD(32, 0, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATRD);
+		dma_buffer->data.sfcmd[8] =  SFLASH_PREPCMD(4, 10, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfexec = 1;
+		dma_buffer->data.sfstat[0] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[1] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[2] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[3] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[4] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[5] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[6] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[7] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[8] = CLEAN_DATA_32;
+		dma_buffer->data.addr0 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr1 = (ONENAND_START_ADDRESS_8 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.addr2 = (ONENAND_START_BUFFER << 16) |
+						(ONENAND_START_ADDRESS_2);
+		dma_buffer->data.addr3 = (ONENAND_ECC_STATUS << 16) |
+						(ONENAND_COMMAND);
+		dma_buffer->data.addr4 = (ONENAND_CONTROLLER_STATUS << 16) |
+						(ONENAND_INTERRUPT_STATUS);
+		dma_buffer->data.addr5 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr6 = (ONENAND_START_ADDRESS_3 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.data0 = (ONENAND_CLRINTR << 16) |
+						(onenand_sysconfig1);
+		dma_buffer->data.data1 = (onenand_startaddr8 << 16) |
+						(onenand_startaddr1);
+		dma_buffer->data.data2 = (onenand_startbuffer << 16) |
+						(onenand_startaddr2);
+		dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_CMDLOADSPARE);
+		dma_buffer->data.data4 = (CLEAN_DATA_16 << 16) |
+						(CLEAN_DATA_16);
+		dma_buffer->data.data5 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data6 = (ONENAND_STARTADDR3_RES << 16) |
+						(ONENAND_STARTADDR1_RES);
+		dma_buffer->data.macro[0] = 0x0200;
+		dma_buffer->data.macro[1] = 0x0300;
+		dma_buffer->data.macro[2] = 0x0400;
+		dma_buffer->data.macro[3] = 0x0500;
+		dma_buffer->data.macro[4] = 0x8010;
+
+		/*************************************************************/
+		/* Write necessary address registers in the onenand device   */
+		/*************************************************************/
+
+		/* Enable and configure the SFlash controller */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfbcfg);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[0]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the ADDR0 and ADDR1 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+		cmd->dst = MSM_NAND_ADDR0;
+		cmd->len = 8;
+		cmd++;
+
+		/* Write the ADDR2 ADDR3 ADDR4 ADDR5 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+		cmd->dst = MSM_NAND_ADDR2;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the ADDR6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr6);
+		cmd->dst = MSM_NAND_ADDR6;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the GENP0, GENP1, GENP2, GENP3 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+		cmd->dst = MSM_NAND_GENP_REG0;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the FLASH_DEV_CMD4,5,6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->dst = MSM_NAND_DEV_CMD4;
+		cmd->len = 12;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[0]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Wait for the interrupt from the Onenand device controller */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[1]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[1]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Read necessary status registers from the onenand device   */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[2]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[2]);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the GENP3 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_GENP_REG3;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data3);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the DEVCMD4 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_DEV_CMD4;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Read the data ram area from the onenand buffer ram        */
+		/*************************************************************/
+
+		if (ops->datbuf) {
+
+			dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+							(ONENAND_CMDLOAD);
+
+			for (i = 0; i < 4; i++) {
+
+				/* Block on cmd ready and write CMD register */
+				cmd->cmd = DST_CRCI_NAND_CMD;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfcmd[3+i]);
+				cmd->dst = MSM_NAND_SFLASHC_CMD;
+				cmd->len = 4;
+				cmd++;
+
+				/* Write the MACRO1 register */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.macro[i]);
+				cmd->dst = MSM_NAND_MACRO1_REG;
+				cmd->len = 4;
+				cmd++;
+
+				/* Kick the execute command */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfexec);
+				cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+				cmd->len = 4;
+				cmd++;
+
+				/* Block on data rdy, & read status register */
+				cmd->cmd = SRC_CRCI_NAND_DATA;
+				cmd->src = MSM_NAND_SFLASHC_STATUS;
+				cmd->dst = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfstat[3+i]);
+				cmd->len = 4;
+				cmd++;
+
+				/* Transfer nand ctlr buf contents to usr buf */
+				cmd->cmd = 0;
+				cmd->src = MSM_NAND_FLASH_BUFFER;
+				cmd->dst = data_dma_addr_curr;
+				cmd->len = 512;
+				data_dma_addr_curr += 512;
+				cmd++;
+			}
+		}
+
+		if ((ops->oobbuf) || (ops->mode == MTD_OPS_RAW)) {
+
+			/* Block on cmd ready and write CMD register */
+			cmd->cmd = DST_CRCI_NAND_CMD;
+			cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.sfcmd[7]);
+			cmd->dst = MSM_NAND_SFLASHC_CMD;
+			cmd->len = 4;
+			cmd++;
+
+			/* Write the MACRO1 register */
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.macro[4]);
+			cmd->dst = MSM_NAND_MACRO1_REG;
+			cmd->len = 4;
+			cmd++;
+
+			/* Kick the execute command */
+			cmd->cmd = 0;
+			cmd->src = msm_virt_to_dma(chip,
+					&dma_buffer->data.sfexec);
+			cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+			cmd->len = 4;
+			cmd++;
+
+			/* Block on data ready, and read status register */
+			cmd->cmd = SRC_CRCI_NAND_DATA;
+			cmd->src = MSM_NAND_SFLASHC_STATUS;
+			cmd->dst = msm_virt_to_dma(chip,
+					&dma_buffer->data.sfstat[7]);
+			cmd->len = 4;
+			cmd++;
+
+			/* Transfer nand ctlr buffer contents into usr buf */
+			if (ops->mode == MTD_OPS_AUTO_OOB) {
+				for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) {
+					cmd->cmd = 0;
+					cmd->src = MSM_NAND_FLASH_BUFFER +
+					mtd->ecclayout->oobfree[i].offset;
+					cmd->dst = oob_dma_addr_curr;
+					cmd->len =
+					mtd->ecclayout->oobfree[i].length;
+					oob_dma_addr_curr +=
+					mtd->ecclayout->oobfree[i].length;
+					cmd++;
+				}
+			}
+			if (ops->mode == MTD_OPS_PLACE_OOB) {
+					cmd->cmd = 0;
+					cmd->src = MSM_NAND_FLASH_BUFFER;
+					cmd->dst = oob_dma_addr_curr;
+					cmd->len = mtd->oobsize;
+					oob_dma_addr_curr += mtd->oobsize;
+					cmd++;
+			}
+			if (ops->mode == MTD_OPS_RAW) {
+					cmd->cmd = 0;
+					cmd->src = MSM_NAND_FLASH_BUFFER;
+					cmd->dst = data_dma_addr_curr;
+					cmd->len = mtd->oobsize;
+					data_dma_addr_curr += mtd->oobsize;
+					cmd++;
+			}
+		}
+
+		/*************************************************************/
+		/* Restore the necessary registers to proper values          */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[8]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[8]);
+		cmd->len = 4;
+		cmd++;
+
+
+		BUILD_BUG_ON(53 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+				>> 3) | CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+				&dma_buffer->cmdptr)));
+		mb();
+
+		ecc_status = (dma_buffer->data.data3 >> 16) &
+							0x0000FFFF;
+		interrupt_status = (dma_buffer->data.data4 >> 0) &
+							0x0000FFFF;
+		controller_status = (dma_buffer->data.data4 >> 16) &
+							0x0000FFFF;
+
+#if VERBOSE
+		pr_info("\n%s: sflash status %x %x %x %x %x %x %x"
+				"%x %x\n", __func__,
+					dma_buffer->data.sfstat[0],
+					dma_buffer->data.sfstat[1],
+					dma_buffer->data.sfstat[2],
+					dma_buffer->data.sfstat[3],
+					dma_buffer->data.sfstat[4],
+					dma_buffer->data.sfstat[5],
+					dma_buffer->data.sfstat[6],
+					dma_buffer->data.sfstat[7],
+					dma_buffer->data.sfstat[8]);
+
+		pr_info("%s: controller_status = %x\n", __func__,
+					controller_status);
+		pr_info("%s: interrupt_status = %x\n", __func__,
+					interrupt_status);
+		pr_info("%s: ecc_status = %x\n", __func__,
+					ecc_status);
+#endif
+		/* Check for errors, protection violations etc */
+		if ((controller_status != 0)
+				|| (dma_buffer->data.sfstat[0] & 0x110)
+				|| (dma_buffer->data.sfstat[1] & 0x110)
+				|| (dma_buffer->data.sfstat[2] & 0x110)
+				|| (dma_buffer->data.sfstat[8] & 0x110)
+				|| ((dma_buffer->data.sfstat[3] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[4] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[5] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[6] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[7] & 0x110) &&
+								((ops->oobbuf)
+					|| (ops->mode == MTD_OPS_RAW)))) {
+			pr_info("%s: ECC/MPU/OP error\n", __func__);
+			err = -EIO;
+		}
+
+		if (err)
+			break;
+		pages_read++;
+		from_curr += mtd->writesize;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (ops->oobbuf) {
+		dma_unmap_page(chip->dev, oob_dma_addr, ops->ooblen,
+				DMA_FROM_DEVICE);
+	}
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf) {
+		dma_unmap_page(chip->dev, data_dma_addr, ops->len,
+				DMA_FROM_DEVICE);
+	}
+
+	if (err) {
+		pr_err("%s: %llx %x %x failed\n", __func__, from_curr,
+				ops->datbuf ? ops->len : 0, ops->ooblen);
+	} else {
+		ops->retlen = ops->oobretlen = 0;
+		if (ops->datbuf != NULL) {
+			if (ops->mode != MTD_OPS_RAW)
+				ops->retlen = mtd->writesize * pages_read;
+			else
+				ops->retlen = (mtd->writesize +  mtd->oobsize)
+							* pages_read;
+		}
+		if (ops->oobbuf != NULL) {
+			if (ops->mode == MTD_OPS_AUTO_OOB)
+				ops->oobretlen = mtd->oobavail * pages_read;
+			else
+				ops->oobretlen = mtd->oobsize * pages_read;
+		}
+	}
+
+#if VERBOSE
+	pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+			__func__, err, ops->retlen, ops->oobretlen);
+
+	pr_info("==================================================="
+			"==============\n");
+#endif
+	return err;
+}
+
+int msm_onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
+		size_t *retlen, u_char *buf)
+{
+	int ret;
+	struct mtd_oob_ops ops;
+
+	ops.mode = MTD_OPS_PLACE_OOB;
+	ops.datbuf = buf;
+	ops.len = len;
+	ops.retlen = 0;
+	ops.oobbuf = NULL;
+	ops.ooblen = 0;
+	ops.oobretlen = 0;
+	ret =  msm_onenand_read_oob(mtd, from, &ops);
+	*retlen = ops.retlen;
+
+	return ret;
+}
+
+static int msm_onenand_write_oob(struct mtd_info *mtd, loff_t to,
+		struct mtd_oob_ops *ops)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[53];
+		unsigned cmdptr;
+		struct {
+			uint32_t sfbcfg;
+			uint32_t sfcmd[10];
+			uint32_t sfexec;
+			uint32_t sfstat[10];
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+			uint32_t macro[5];
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+	int i, j, k;
+	dma_addr_t data_dma_addr = 0;
+	dma_addr_t oob_dma_addr = 0;
+	dma_addr_t init_dma_addr = 0;
+	dma_addr_t data_dma_addr_curr = 0;
+	dma_addr_t oob_dma_addr_curr = 0;
+	uint8_t *init_spare_bytes;
+
+	loff_t to_curr = 0;
+	unsigned page_count;
+	unsigned pages_written = 0;
+
+	uint16_t onenand_startaddr1;
+	uint16_t onenand_startaddr8;
+	uint16_t onenand_startaddr2;
+	uint16_t onenand_startbuffer;
+	uint16_t onenand_sysconfig1;
+
+	uint16_t controller_status;
+	uint16_t interrupt_status;
+	uint16_t ecc_status;
+
+#if VERBOSE
+	pr_info("================================================="
+			"================\n");
+	pr_info("%s: to 0x%llx mode %d \ndatbuf 0x%p datlen 0x%x"
+			"\noobbuf 0x%p ooblen 0x%x\n",
+			__func__, to, ops->mode, ops->datbuf, ops->len,
+			ops->oobbuf, ops->ooblen);
+#endif
+	if (!mtd) {
+		pr_err("%s: invalid mtd pointer, 0x%x\n", __func__,
+				(uint32_t)mtd);
+		return -EINVAL;
+	}
+	if (to & (mtd->writesize - 1)) {
+		pr_err("%s: unsupported to, 0x%llx\n", __func__, to);
+		return -EINVAL;
+	}
+
+	if ((ops->mode != MTD_OPS_PLACE_OOB) && (ops->mode != MTD_OPS_AUTO_OOB) &&
+			(ops->mode != MTD_OPS_RAW)) {
+		pr_err("%s: unsupported ops->mode, %d\n", __func__,
+				ops->mode);
+		return -EINVAL;
+	}
+
+	if (((ops->datbuf == NULL) || (ops->len == 0)) &&
+			((ops->oobbuf == NULL) || (ops->ooblen == 0))) {
+		pr_err("%s: incorrect ops fields - nothing to do\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if ((ops->datbuf != NULL) && (ops->len == 0)) {
+		pr_err("%s: data buffer passed but length 0\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if ((ops->oobbuf != NULL) && (ops->ooblen == 0)) {
+		pr_err("%s: oob buffer passed but length 0\n",
+				__func__);
+		return -EINVAL;
+	}
+
+	if (ops->mode != MTD_OPS_RAW) {
+		if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0) {
+			/* when ops->datbuf is NULL, ops->len can be ooblen */
+			pr_err("%s: unsupported ops->len, %d\n", __func__,
+					ops->len);
+			return -EINVAL;
+		}
+	} else {
+		if (ops->datbuf != NULL &&
+			(ops->len % (mtd->writesize + mtd->oobsize)) != 0) {
+			pr_err("%s: unsupported ops->len,"
+				" %d for MTD_OPS_RAW\n", __func__, ops->len);
+			return -EINVAL;
+		}
+	}
+
+	if ((ops->mode == MTD_OPS_RAW) && (ops->oobbuf)) {
+		pr_err("%s: unsupported operation, oobbuf pointer "
+				"passed in for RAW mode, %x\n", __func__,
+				(uint32_t)ops->oobbuf);
+		return -EINVAL;
+	}
+
+	if (ops->oobbuf && !ops->datbuf) {
+		page_count = ops->ooblen / ((ops->mode == MTD_OPS_AUTO_OOB) ?
+			mtd->oobavail : mtd->oobsize);
+		if ((page_count == 0) && (ops->ooblen))
+			page_count = 1;
+	} else if (ops->mode != MTD_OPS_RAW)
+			page_count = ops->len / mtd->writesize;
+		else
+			page_count = ops->len / (mtd->writesize + mtd->oobsize);
+
+	if ((ops->mode == MTD_OPS_AUTO_OOB) && (ops->oobbuf != NULL)) {
+		if (page_count > 1) {
+			pr_err("%s: unsupported ops->ooblen for"
+				"AUTO, %d\n", __func__, ops->ooblen);
+			return -EINVAL;
+		}
+	}
+
+	if ((ops->mode == MTD_OPS_PLACE_OOB) && (ops->oobbuf != NULL)) {
+		if (page_count * mtd->oobsize > ops->ooblen) {
+			pr_err("%s: unsupported ops->ooblen for"
+				"PLACE,	%d\n", __func__, ops->ooblen);
+			return -EINVAL;
+		}
+	}
+
+	if ((ops->mode == MTD_OPS_PLACE_OOB) && (ops->ooblen != 0) &&
+						(ops->ooboffs != 0)) {
+		pr_err("%s: unsupported ops->ooboffs, %d\n",
+				__func__, ops->ooboffs);
+		return -EINVAL;
+	}
+
+	init_spare_bytes = kmalloc(64, GFP_KERNEL);
+	if (!init_spare_bytes) {
+		pr_err("%s: failed to alloc init_spare_bytes buffer\n",
+				__func__);
+		return -ENOMEM;
+	}
+	for (i = 0; i < 64; i++)
+		init_spare_bytes[i] = 0xFF;
+
+	if ((ops->oobbuf) && (ops->mode == MTD_OPS_AUTO_OOB)) {
+		for (i = 0, k = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++)
+			for (j = 0; j < mtd->ecclayout->oobfree[i].length;
+					j++) {
+				init_spare_bytes[j +
+					mtd->ecclayout->oobfree[i].offset]
+						= (ops->oobbuf)[k];
+				k++;
+			}
+	}
+
+	if (ops->datbuf) {
+		data_dma_addr_curr = data_dma_addr = msm_nand_dma_map(chip->dev,
+				ops->datbuf, ops->len, DMA_TO_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, data_dma_addr)) {
+			pr_err("%s: failed to get dma addr for %p\n",
+					__func__, ops->datbuf);
+			return -EIO;
+		}
+	}
+	if (ops->oobbuf) {
+		oob_dma_addr_curr = oob_dma_addr = msm_nand_dma_map(chip->dev,
+				ops->oobbuf, ops->ooblen, DMA_TO_DEVICE, NULL);
+		if (dma_mapping_error(chip->dev, oob_dma_addr)) {
+			pr_err("%s: failed to get dma addr for %p\n",
+					__func__, ops->oobbuf);
+			err = -EIO;
+			goto err_dma_map_oobbuf_failed;
+		}
+	}
+
+	init_dma_addr = msm_nand_dma_map(chip->dev, init_spare_bytes, 64,
+					 DMA_TO_DEVICE, NULL);
+	if (dma_mapping_error(chip->dev, init_dma_addr)) {
+		pr_err("%s: failed to get dma addr for %p\n",
+				__func__, init_spare_bytes);
+		err = -EIO;
+		goto err_dma_map_initbuf_failed;
+	}
+
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	to_curr = to;
+
+	while (page_count-- > 0) {
+		cmd = dma_buffer->cmd;
+
+		if ((onenand_info.device_id & ONENAND_DEVICE_IS_DDP)
+			&& (to_curr >= (mtd->size>>1))) { /* DDP Device */
+				onenand_startaddr1 = DEVICE_FLASHCORE_1 |
+					(((uint32_t)(to_curr-(mtd->size>>1))
+					/ mtd->erasesize));
+				onenand_startaddr2 = DEVICE_BUFFERRAM_1;
+		} else {
+				onenand_startaddr1 = DEVICE_FLASHCORE_0 |
+					((uint32_t)to_curr / mtd->erasesize) ;
+				onenand_startaddr2 = DEVICE_BUFFERRAM_0;
+		}
+
+		onenand_startaddr8 = (((uint32_t)to_curr &
+				(mtd->erasesize - 1)) / mtd->writesize) << 2;
+		onenand_startbuffer = DATARAM0_0 << 8;
+		onenand_sysconfig1 = (ops->mode == MTD_OPS_RAW) ?
+			ONENAND_SYSCFG1_ECCDIS(nand_sfcmd_mode) :
+			ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode);
+
+		dma_buffer->data.sfbcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+		dma_buffer->data.sfcmd[0] =  SFLASH_PREPCMD(6, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfcmd[1] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATWR);
+		dma_buffer->data.sfcmd[2] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATWR);
+		dma_buffer->data.sfcmd[3] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATWR);
+		dma_buffer->data.sfcmd[4] =  SFLASH_PREPCMD(256, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATWR);
+		dma_buffer->data.sfcmd[5] =  SFLASH_PREPCMD(32, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_DATWR);
+		dma_buffer->data.sfcmd[6] =  SFLASH_PREPCMD(1, 6, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfcmd[7] =  SFLASH_PREPCMD(0, 0, 32,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_INTHI);
+		dma_buffer->data.sfcmd[8] =  SFLASH_PREPCMD(3, 7, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGRD);
+		dma_buffer->data.sfcmd[9] =  SFLASH_PREPCMD(4, 10, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfexec = 1;
+		dma_buffer->data.sfstat[0] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[1] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[2] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[3] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[4] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[5] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[6] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[7] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[8] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[9] = CLEAN_DATA_32;
+		dma_buffer->data.addr0 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr1 = (ONENAND_START_ADDRESS_8 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.addr2 = (ONENAND_START_BUFFER << 16) |
+						(ONENAND_START_ADDRESS_2);
+		dma_buffer->data.addr3 = (ONENAND_ECC_STATUS << 16) |
+						(ONENAND_COMMAND);
+		dma_buffer->data.addr4 = (ONENAND_CONTROLLER_STATUS << 16) |
+						(ONENAND_INTERRUPT_STATUS);
+		dma_buffer->data.addr5 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr6 = (ONENAND_START_ADDRESS_3 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.data0 = (ONENAND_CLRINTR << 16) |
+						(onenand_sysconfig1);
+		dma_buffer->data.data1 = (onenand_startaddr8 << 16) |
+						(onenand_startaddr1);
+		dma_buffer->data.data2 = (onenand_startbuffer << 16) |
+						(onenand_startaddr2);
+		dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_CMDPROGSPARE);
+		dma_buffer->data.data4 = (CLEAN_DATA_16 << 16) |
+						(CLEAN_DATA_16);
+		dma_buffer->data.data5 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data6 = (ONENAND_STARTADDR3_RES << 16) |
+						(ONENAND_STARTADDR1_RES);
+		dma_buffer->data.macro[0] = 0x0200;
+		dma_buffer->data.macro[1] = 0x0300;
+		dma_buffer->data.macro[2] = 0x0400;
+		dma_buffer->data.macro[3] = 0x0500;
+		dma_buffer->data.macro[4] = 0x8010;
+
+
+		/*************************************************************/
+		/* Write necessary address registers in the onenand device   */
+		/*************************************************************/
+
+		/* Enable and configure the SFlash controller */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfbcfg);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[0]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the ADDR0 and ADDR1 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+		cmd->dst = MSM_NAND_ADDR0;
+		cmd->len = 8;
+		cmd++;
+
+		/* Write the ADDR2 ADDR3 ADDR4 ADDR5 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+		cmd->dst = MSM_NAND_ADDR2;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the ADDR6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr6);
+		cmd->dst = MSM_NAND_ADDR6;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the GENP0, GENP1, GENP2, GENP3 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+		cmd->dst = MSM_NAND_GENP_REG0;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the FLASH_DEV_CMD4,5,6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->dst = MSM_NAND_DEV_CMD4;
+		cmd->len = 12;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[0]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Write the data ram area in the onenand buffer ram         */
+		/*************************************************************/
+
+		if (ops->datbuf) {
+			dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+							(ONENAND_CMDPROG);
+
+			for (i = 0; i < 4; i++) {
+
+				/* Block on cmd ready and write CMD register */
+				cmd->cmd = DST_CRCI_NAND_CMD;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfcmd[1+i]);
+				cmd->dst = MSM_NAND_SFLASHC_CMD;
+				cmd->len = 4;
+				cmd++;
+
+				/* Trnsfr usr buf contents to nand ctlr buf */
+				cmd->cmd = 0;
+				cmd->src = data_dma_addr_curr;
+				cmd->dst = MSM_NAND_FLASH_BUFFER;
+				cmd->len = 512;
+				data_dma_addr_curr += 512;
+				cmd++;
+
+				/* Write the MACRO1 register */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.macro[i]);
+				cmd->dst = MSM_NAND_MACRO1_REG;
+				cmd->len = 4;
+				cmd++;
+
+				/* Kick the execute command */
+				cmd->cmd = 0;
+				cmd->src = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfexec);
+				cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+				cmd->len = 4;
+				cmd++;
+
+				/* Block on data rdy, & read status register */
+				cmd->cmd = SRC_CRCI_NAND_DATA;
+				cmd->src = MSM_NAND_SFLASHC_STATUS;
+				cmd->dst = msm_virt_to_dma(chip,
+						&dma_buffer->data.sfstat[1+i]);
+				cmd->len = 4;
+				cmd++;
+
+			}
+		}
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[5]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		if ((ops->oobbuf) || (ops->mode == MTD_OPS_RAW)) {
+
+			/* Transfer user buf contents into nand ctlr buffer */
+			if (ops->mode == MTD_OPS_AUTO_OOB) {
+				cmd->cmd = 0;
+				cmd->src = init_dma_addr;
+				cmd->dst = MSM_NAND_FLASH_BUFFER;
+				cmd->len = mtd->oobsize;
+				cmd++;
+			}
+			if (ops->mode == MTD_OPS_PLACE_OOB) {
+				cmd->cmd = 0;
+				cmd->src = oob_dma_addr_curr;
+				cmd->dst = MSM_NAND_FLASH_BUFFER;
+				cmd->len = mtd->oobsize;
+				oob_dma_addr_curr += mtd->oobsize;
+				cmd++;
+			}
+			if (ops->mode == MTD_OPS_RAW) {
+				cmd->cmd = 0;
+				cmd->src = data_dma_addr_curr;
+				cmd->dst = MSM_NAND_FLASH_BUFFER;
+				cmd->len = mtd->oobsize;
+				data_dma_addr_curr += mtd->oobsize;
+				cmd++;
+			}
+		} else {
+				cmd->cmd = 0;
+				cmd->src = init_dma_addr;
+				cmd->dst = MSM_NAND_FLASH_BUFFER;
+				cmd->len = mtd->oobsize;
+				cmd++;
+		}
+
+		/* Write the MACRO1 register */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.macro[4]);
+		cmd->dst = MSM_NAND_MACRO1_REG;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[5]);
+		cmd->len = 4;
+		cmd++;
+
+		/*********************************************************/
+		/* Issuing write command                                 */
+		/*********************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[6]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[6]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Wait for the interrupt from the Onenand device controller */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[7]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[7]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Read necessary status registers from the onenand device   */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[8]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[8]);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the GENP3 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_GENP_REG3;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data3);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the DEVCMD4 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_DEV_CMD4;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Restore the necessary registers to proper values          */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[9]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[9]);
+		cmd->len = 4;
+		cmd++;
+
+
+		BUILD_BUG_ON(53 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+				>> 3) | CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+				&dma_buffer->cmdptr)));
+		mb();
+
+		ecc_status = (dma_buffer->data.data3 >> 16) & 0x0000FFFF;
+		interrupt_status = (dma_buffer->data.data4 >> 0)&0x0000FFFF;
+		controller_status = (dma_buffer->data.data4 >> 16)&0x0000FFFF;
+
+#if VERBOSE
+		pr_info("\n%s: sflash status %x %x %x %x %x %x %x"
+				" %x %x %x\n", __func__,
+					dma_buffer->data.sfstat[0],
+					dma_buffer->data.sfstat[1],
+					dma_buffer->data.sfstat[2],
+					dma_buffer->data.sfstat[3],
+					dma_buffer->data.sfstat[4],
+					dma_buffer->data.sfstat[5],
+					dma_buffer->data.sfstat[6],
+					dma_buffer->data.sfstat[7],
+					dma_buffer->data.sfstat[8],
+					dma_buffer->data.sfstat[9]);
+
+		pr_info("%s: controller_status = %x\n", __func__,
+					controller_status);
+		pr_info("%s: interrupt_status = %x\n", __func__,
+					interrupt_status);
+		pr_info("%s: ecc_status = %x\n", __func__,
+					ecc_status);
+#endif
+		/* Check for errors, protection violations etc */
+		if ((controller_status != 0)
+				|| (dma_buffer->data.sfstat[0] & 0x110)
+				|| (dma_buffer->data.sfstat[6] & 0x110)
+				|| (dma_buffer->data.sfstat[7] & 0x110)
+				|| (dma_buffer->data.sfstat[8] & 0x110)
+				|| (dma_buffer->data.sfstat[9] & 0x110)
+				|| ((dma_buffer->data.sfstat[1] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[2] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[3] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[4] & 0x110) &&
+								(ops->datbuf))
+				|| ((dma_buffer->data.sfstat[5] & 0x110) &&
+								((ops->oobbuf)
+					|| (ops->mode == MTD_OPS_RAW)))) {
+			pr_info("%s: ECC/MPU/OP error\n", __func__);
+			err = -EIO;
+		}
+
+		if (err)
+			break;
+		pages_written++;
+		to_curr += mtd->writesize;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	dma_unmap_page(chip->dev, init_dma_addr, 64, DMA_TO_DEVICE);
+
+err_dma_map_initbuf_failed:
+	if (ops->oobbuf) {
+		dma_unmap_page(chip->dev, oob_dma_addr, ops->ooblen,
+							DMA_TO_DEVICE);
+	}
+err_dma_map_oobbuf_failed:
+	if (ops->datbuf) {
+		dma_unmap_page(chip->dev, data_dma_addr, ops->len,
+							DMA_TO_DEVICE);
+	}
+
+	if (err) {
+		pr_err("%s: %llx %x %x failed\n", __func__, to_curr,
+				ops->datbuf ? ops->len : 0, ops->ooblen);
+	} else {
+		ops->retlen = ops->oobretlen = 0;
+		if (ops->datbuf != NULL) {
+			if (ops->mode != MTD_OPS_RAW)
+				ops->retlen = mtd->writesize * pages_written;
+			else
+				ops->retlen = (mtd->writesize +  mtd->oobsize)
+							* pages_written;
+		}
+		if (ops->oobbuf != NULL) {
+			if (ops->mode == MTD_OPS_AUTO_OOB)
+				ops->oobretlen = mtd->oobavail * pages_written;
+			else
+				ops->oobretlen = mtd->oobsize * pages_written;
+		}
+	}
+
+#if VERBOSE
+	pr_info("\n%s: ret %d, retlen %d oobretlen %d\n",
+			__func__, err, ops->retlen, ops->oobretlen);
+
+	pr_info("================================================="
+			"================\n");
+#endif
+	kfree(init_spare_bytes);
+	return err;
+}
+
+static int msm_onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
+		size_t *retlen, const u_char *buf)
+{
+	int ret;
+	struct mtd_oob_ops ops;
+
+	ops.mode = MTD_OPS_PLACE_OOB;
+	ops.datbuf = (uint8_t *)buf;
+	ops.len = len;
+	ops.retlen = 0;
+	ops.oobbuf = NULL;
+	ops.ooblen = 0;
+	ops.oobretlen = 0;
+	ret =  msm_onenand_write_oob(mtd, to, &ops);
+	*retlen = ops.retlen;
+
+	return ret;
+}
+
+static int msm_onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[20];
+		unsigned cmdptr;
+		struct {
+			uint32_t sfbcfg;
+			uint32_t sfcmd[4];
+			uint32_t sfexec;
+			uint32_t sfstat[4];
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+
+	uint16_t onenand_startaddr1;
+	uint16_t onenand_startaddr8;
+	uint16_t onenand_startaddr2;
+	uint16_t onenand_startbuffer;
+
+	uint16_t controller_status;
+	uint16_t interrupt_status;
+	uint16_t ecc_status;
+
+	uint64_t temp;
+
+#if VERBOSE
+	pr_info("================================================="
+			"================\n");
+	pr_info("%s: addr 0x%llx len 0x%llx\n",
+			__func__, instr->addr, instr->len);
+#endif
+	if (instr->addr & (mtd->erasesize - 1)) {
+		pr_err("%s: Unsupported erase address, 0x%llx\n",
+				__func__, instr->addr);
+		return -EINVAL;
+	}
+	if (instr->len != mtd->erasesize) {
+		pr_err("%s: Unsupported erase len, %lld\n",
+				__func__, instr->len);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	cmd = dma_buffer->cmd;
+
+	temp = instr->addr;
+
+	if ((onenand_info.device_id & ONENAND_DEVICE_IS_DDP)
+		&& (temp >= (mtd->size>>1))) { /* DDP Device */
+			onenand_startaddr1 = DEVICE_FLASHCORE_1 |
+				(((uint32_t)(temp-(mtd->size>>1))
+						/ mtd->erasesize));
+			onenand_startaddr2 = DEVICE_BUFFERRAM_1;
+	} else {
+		onenand_startaddr1 = DEVICE_FLASHCORE_0 |
+			((uint32_t)temp / mtd->erasesize) ;
+		onenand_startaddr2 = DEVICE_BUFFERRAM_0;
+	}
+
+	onenand_startaddr8 = 0x0000;
+	onenand_startbuffer = DATARAM0_0 << 8;
+
+	dma_buffer->data.sfbcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+	dma_buffer->data.sfcmd[0] = SFLASH_PREPCMD(7, 0, 0,
+						MSM_NAND_SFCMD_CMDXS,
+						nand_sfcmd_mode,
+						MSM_NAND_SFCMD_REGWR);
+	dma_buffer->data.sfcmd[1] = SFLASH_PREPCMD(0, 0, 32,
+						MSM_NAND_SFCMD_CMDXS,
+						nand_sfcmd_mode,
+						MSM_NAND_SFCMD_INTHI);
+	dma_buffer->data.sfcmd[2] = SFLASH_PREPCMD(3, 7, 0,
+						MSM_NAND_SFCMD_DATXS,
+						nand_sfcmd_mode,
+						MSM_NAND_SFCMD_REGRD);
+	dma_buffer->data.sfcmd[3] = SFLASH_PREPCMD(4, 10, 0,
+						MSM_NAND_SFCMD_CMDXS,
+						nand_sfcmd_mode,
+						MSM_NAND_SFCMD_REGWR);
+	dma_buffer->data.sfexec = 1;
+	dma_buffer->data.sfstat[0] = CLEAN_DATA_32;
+	dma_buffer->data.sfstat[1] = CLEAN_DATA_32;
+	dma_buffer->data.sfstat[2] = CLEAN_DATA_32;
+	dma_buffer->data.sfstat[3] = CLEAN_DATA_32;
+	dma_buffer->data.addr0 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+	dma_buffer->data.addr1 = (ONENAND_START_ADDRESS_8 << 16) |
+						(ONENAND_START_ADDRESS_1);
+	dma_buffer->data.addr2 = (ONENAND_START_BUFFER << 16) |
+						(ONENAND_START_ADDRESS_2);
+	dma_buffer->data.addr3 = (ONENAND_ECC_STATUS << 16) |
+						(ONENAND_COMMAND);
+	dma_buffer->data.addr4 = (ONENAND_CONTROLLER_STATUS << 16) |
+						(ONENAND_INTERRUPT_STATUS);
+	dma_buffer->data.addr5 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+	dma_buffer->data.addr6 = (ONENAND_START_ADDRESS_3 << 16) |
+						(ONENAND_START_ADDRESS_1);
+	dma_buffer->data.data0 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+	dma_buffer->data.data1 = (onenand_startaddr8 << 16) |
+						(onenand_startaddr1);
+	dma_buffer->data.data2 = (onenand_startbuffer << 16) |
+						(onenand_startaddr2);
+	dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_CMDERAS);
+	dma_buffer->data.data4 = (CLEAN_DATA_16 << 16) |
+						(CLEAN_DATA_16);
+	dma_buffer->data.data5 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+	dma_buffer->data.data6 = (ONENAND_STARTADDR3_RES << 16) |
+						(ONENAND_STARTADDR1_RES);
+
+	/***************************************************************/
+	/* Write the necessary address registers in the onenand device */
+	/***************************************************************/
+
+	/* Enable and configure the SFlash controller */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfbcfg);
+	cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on cmd ready and write CMD register */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[0]);
+	cmd->dst = MSM_NAND_SFLASHC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Write the ADDR0 and ADDR1 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+	cmd->dst = MSM_NAND_ADDR0;
+	cmd->len = 8;
+	cmd++;
+
+	/* Write the ADDR2 ADDR3 ADDR4 ADDR5 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+	cmd->dst = MSM_NAND_ADDR2;
+	cmd->len = 16;
+	cmd++;
+
+	/* Write the ADDR6 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr6);
+	cmd->dst = MSM_NAND_ADDR6;
+	cmd->len = 4;
+	cmd++;
+
+	/* Write the GENP0, GENP1, GENP2, GENP3, GENP4 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+	cmd->dst = MSM_NAND_GENP_REG0;
+	cmd->len = 16;
+	cmd++;
+
+	/* Write the FLASH_DEV_CMD4,5,6 registers */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+	cmd->dst = MSM_NAND_DEV_CMD4;
+	cmd->len = 12;
+	cmd++;
+
+	/* Kick the execute command */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+	cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on data ready, and read the status register */
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_SFLASHC_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[0]);
+	cmd->len = 4;
+	cmd++;
+
+	/***************************************************************/
+	/* Wait for the interrupt from the Onenand device controller   */
+	/***************************************************************/
+
+	/* Block on cmd ready and write CMD register */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[1]);
+	cmd->dst = MSM_NAND_SFLASHC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Kick the execute command */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+	cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on data ready, and read the status register */
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_SFLASHC_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[1]);
+	cmd->len = 4;
+	cmd++;
+
+	/***************************************************************/
+	/* Read the necessary status registers from the onenand device */
+	/***************************************************************/
+
+	/* Block on cmd ready and write CMD register */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[2]);
+	cmd->dst = MSM_NAND_SFLASHC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Kick the execute command */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+	cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on data ready, and read the status register */
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_SFLASHC_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[2]);
+	cmd->len = 4;
+	cmd++;
+
+	/* Read the GENP3 register */
+	cmd->cmd = 0;
+	cmd->src = MSM_NAND_GENP_REG3;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data3);
+	cmd->len = 4;
+	cmd++;
+
+	/* Read the DEVCMD4 register */
+	cmd->cmd = 0;
+	cmd->src = MSM_NAND_DEV_CMD4;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+	cmd->len = 4;
+	cmd++;
+
+	/***************************************************************/
+	/* Restore the necessary registers to proper values            */
+	/***************************************************************/
+
+	/* Block on cmd ready and write CMD register */
+	cmd->cmd = DST_CRCI_NAND_CMD;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[3]);
+	cmd->dst = MSM_NAND_SFLASHC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Kick the execute command */
+	cmd->cmd = 0;
+	cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+	cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+	cmd->len = 4;
+	cmd++;
+
+	/* Block on data ready, and read the status register */
+	cmd->cmd = SRC_CRCI_NAND_DATA;
+	cmd->src = MSM_NAND_SFLASHC_STATUS;
+	cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[3]);
+	cmd->len = 4;
+	cmd++;
+
+
+	BUILD_BUG_ON(20 != ARRAY_SIZE(dma_buffer->cmd));
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+			>> 3) | CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST
+			| DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+	mb();
+
+	ecc_status = (dma_buffer->data.data3 >> 16) & 0x0000FFFF;
+	interrupt_status = (dma_buffer->data.data4 >> 0) & 0x0000FFFF;
+	controller_status = (dma_buffer->data.data4 >> 16) & 0x0000FFFF;
+
+#if VERBOSE
+	pr_info("\n%s: sflash status %x %x %x %x\n", __func__,
+				dma_buffer->data.sfstat[0],
+				dma_buffer->data.sfstat[1],
+				dma_buffer->data.sfstat[2],
+				dma_buffer->data.sfstat[3]);
+
+	pr_info("%s: controller_status = %x\n", __func__,
+				controller_status);
+	pr_info("%s: interrupt_status = %x\n", __func__,
+				interrupt_status);
+	pr_info("%s: ecc_status = %x\n", __func__,
+				ecc_status);
+#endif
+	/* Check for errors, protection violations etc */
+	if ((controller_status != 0)
+			|| (dma_buffer->data.sfstat[0] & 0x110)
+			|| (dma_buffer->data.sfstat[1] & 0x110)
+			|| (dma_buffer->data.sfstat[2] & 0x110)
+			|| (dma_buffer->data.sfstat[3] & 0x110)) {
+		pr_err("%s: ECC/MPU/OP error\n", __func__);
+		err = -EIO;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+	if (err) {
+		pr_err("%s: Erase failed, 0x%llx\n", __func__,
+				instr->addr);
+		instr->fail_addr = instr->addr;
+		instr->state = MTD_ERASE_FAILED;
+	} else {
+		instr->state = MTD_ERASE_DONE;
+		instr->fail_addr = 0xffffffff;
+		mtd_erase_callback(instr);
+	}
+
+#if VERBOSE
+	pr_info("\n%s: ret %d\n", __func__, err);
+	pr_info("===================================================="
+			"=============\n");
+#endif
+	return err;
+}
+
+static int msm_onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct mtd_oob_ops ops;
+	int rval, i;
+	int ret = 0;
+	uint8_t *buffer;
+	uint8_t *oobptr;
+
+	if ((ofs > mtd->size) || (ofs & (mtd->erasesize - 1))) {
+		pr_err("%s: unsupported block address, 0x%x\n",
+			 __func__, (uint32_t)ofs);
+		return -EINVAL;
+	}
+
+	buffer = kmalloc(2112, GFP_KERNEL|GFP_DMA);
+	if (buffer == 0) {
+		pr_err("%s: Could not kmalloc for buffer\n",
+				__func__);
+		return -ENOMEM;
+	}
+
+	memset(buffer, 0x00, 2112);
+	oobptr = &(buffer[2048]);
+
+	ops.mode = MTD_OPS_RAW;
+	ops.len = 2112;
+	ops.retlen = 0;
+	ops.ooblen = 0;
+	ops.oobretlen = 0;
+	ops.ooboffs = 0;
+	ops.datbuf = buffer;
+	ops.oobbuf = NULL;
+
+	for (i = 0; i < 2; i++) {
+		ofs = ofs + i*mtd->writesize;
+		rval = msm_onenand_read_oob(mtd, ofs, &ops);
+		if (rval) {
+			pr_err("%s: Error in reading bad blk info\n",
+					__func__);
+			ret = rval;
+			break;
+		}
+		if ((oobptr[0] != 0xFF) || (oobptr[1] != 0xFF) ||
+		    (oobptr[16] != 0xFF) || (oobptr[17] != 0xFF) ||
+		    (oobptr[32] != 0xFF) || (oobptr[33] != 0xFF) ||
+		    (oobptr[48] != 0xFF) || (oobptr[49] != 0xFF)
+		   ) {
+			ret = 1;
+			break;
+		}
+	}
+
+	kfree(buffer);
+
+#if VERBOSE
+	if (ret == 1)
+		pr_info("%s : Block containing 0x%x is bad\n",
+				__func__, (unsigned int)ofs);
+#endif
+	return ret;
+}
+
+static int msm_onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct mtd_oob_ops ops;
+	int rval, i;
+	int ret = 0;
+	uint8_t *buffer;
+
+	if ((ofs > mtd->size) || (ofs & (mtd->erasesize - 1))) {
+		pr_err("%s: unsupported block address, 0x%x\n",
+			 __func__, (uint32_t)ofs);
+		return -EINVAL;
+	}
+
+	buffer = page_address(ZERO_PAGE());
+
+	ops.mode = MTD_OPS_RAW;
+	ops.len = 2112;
+	ops.retlen = 0;
+	ops.ooblen = 0;
+	ops.oobretlen = 0;
+	ops.ooboffs = 0;
+	ops.datbuf = buffer;
+	ops.oobbuf = NULL;
+
+	for (i = 0; i < 2; i++) {
+		ofs = ofs + i*mtd->writesize;
+		rval = msm_onenand_write_oob(mtd, ofs, &ops);
+		if (rval) {
+			pr_err("%s: Error in writing bad blk info\n",
+					__func__);
+			ret = rval;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int msm_onenand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[20];
+		unsigned cmdptr;
+		struct {
+			uint32_t sfbcfg;
+			uint32_t sfcmd[4];
+			uint32_t sfexec;
+			uint32_t sfstat[4];
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+
+	uint16_t onenand_startaddr1;
+	uint16_t onenand_startaddr8;
+	uint16_t onenand_startaddr2;
+	uint16_t onenand_startblock;
+
+	uint16_t controller_status;
+	uint16_t interrupt_status;
+	uint16_t write_prot_status;
+
+	uint64_t start_ofs;
+
+#if VERBOSE
+	pr_info("===================================================="
+			"=============\n");
+	pr_info("%s: ofs 0x%llx len %lld\n", __func__, ofs, len);
+#endif
+	/* 'ofs' & 'len' should align to block size */
+	if (ofs&(mtd->erasesize - 1)) {
+		pr_err("%s: Unsupported ofs address, 0x%llx\n",
+				__func__, ofs);
+		return -EINVAL;
+	}
+
+	if (len&(mtd->erasesize - 1)) {
+		pr_err("%s: Unsupported len, %lld\n",
+				__func__, len);
+		return -EINVAL;
+	}
+
+	if (ofs+len > mtd->size) {
+		pr_err("%s: Maximum chip size exceeded\n", __func__);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	for (start_ofs = ofs; ofs < start_ofs+len; ofs = ofs+mtd->erasesize) {
+#if VERBOSE
+		pr_info("%s: ofs 0x%llx len %lld\n", __func__, ofs, len);
+#endif
+
+		cmd = dma_buffer->cmd;
+		if ((onenand_info.device_id & ONENAND_DEVICE_IS_DDP)
+			&& (ofs >= (mtd->size>>1))) { /* DDP Device */
+			onenand_startaddr1 = DEVICE_FLASHCORE_1 |
+				(((uint32_t)(ofs - (mtd->size>>1))
+						/ mtd->erasesize));
+			onenand_startaddr2 = DEVICE_BUFFERRAM_1;
+			onenand_startblock = ((uint32_t)(ofs - (mtd->size>>1))
+						/ mtd->erasesize);
+		} else {
+			onenand_startaddr1 = DEVICE_FLASHCORE_0 |
+					((uint32_t)ofs / mtd->erasesize) ;
+			onenand_startaddr2 = DEVICE_BUFFERRAM_0;
+			onenand_startblock = ((uint32_t)ofs
+						/ mtd->erasesize);
+		}
+
+		onenand_startaddr8 = 0x0000;
+		dma_buffer->data.sfbcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+		dma_buffer->data.sfcmd[0] = SFLASH_PREPCMD(7, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfcmd[1] = SFLASH_PREPCMD(0, 0, 32,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_INTHI);
+		dma_buffer->data.sfcmd[2] = SFLASH_PREPCMD(3, 7, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGRD);
+		dma_buffer->data.sfcmd[3] = SFLASH_PREPCMD(4, 10, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfexec = 1;
+		dma_buffer->data.sfstat[0] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[1] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[2] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[3] = CLEAN_DATA_32;
+		dma_buffer->data.addr0 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr1 = (ONENAND_START_ADDRESS_8 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.addr2 = (ONENAND_START_BLOCK_ADDRESS << 16) |
+						(ONENAND_START_ADDRESS_2);
+		dma_buffer->data.addr3 = (ONENAND_WRITE_PROT_STATUS << 16) |
+						(ONENAND_COMMAND);
+		dma_buffer->data.addr4 = (ONENAND_CONTROLLER_STATUS << 16) |
+						(ONENAND_INTERRUPT_STATUS);
+		dma_buffer->data.addr5 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr6 = (ONENAND_START_ADDRESS_3 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.data0 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data1 = (onenand_startaddr8 << 16) |
+						(onenand_startaddr1);
+		dma_buffer->data.data2 = (onenand_startblock << 16) |
+						(onenand_startaddr2);
+		dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_CMD_UNLOCK);
+		dma_buffer->data.data4 = (CLEAN_DATA_16 << 16) |
+						(CLEAN_DATA_16);
+		dma_buffer->data.data5 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data6 = (ONENAND_STARTADDR3_RES << 16) |
+						(ONENAND_STARTADDR1_RES);
+
+		/*************************************************************/
+		/* Write the necessary address reg in the onenand device     */
+		/*************************************************************/
+
+		/* Enable and configure the SFlash controller */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfbcfg);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[0]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the ADDR0 and ADDR1 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+		cmd->dst = MSM_NAND_ADDR0;
+		cmd->len = 8;
+		cmd++;
+
+		/* Write the ADDR2 ADDR3 ADDR4 ADDR5 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+		cmd->dst = MSM_NAND_ADDR2;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the ADDR6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr6);
+		cmd->dst = MSM_NAND_ADDR6;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the GENP0, GENP1, GENP2, GENP3, GENP4 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+		cmd->dst = MSM_NAND_GENP_REG0;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the FLASH_DEV_CMD4,5,6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->dst = MSM_NAND_DEV_CMD4;
+		cmd->len = 12;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[0]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Wait for the interrupt from the Onenand device controller */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[1]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[1]);
+		cmd->len = 4;
+		cmd++;
+
+		/*********************************************************/
+		/* Read the necessary status reg from the onenand device */
+		/*********************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[2]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[2]);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the GENP3 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_GENP_REG3;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data3);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the DEVCMD4 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_DEV_CMD4;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->len = 4;
+		cmd++;
+
+		/************************************************************/
+		/* Restore the necessary registers to proper values         */
+		/************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[3]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[3]);
+		cmd->len = 4;
+		cmd++;
+
+
+		BUILD_BUG_ON(20 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+				>> 3) | CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+				&dma_buffer->cmdptr)));
+		mb();
+
+		write_prot_status = (dma_buffer->data.data3 >> 16) & 0x0000FFFF;
+		interrupt_status = (dma_buffer->data.data4 >> 0) & 0x0000FFFF;
+		controller_status = (dma_buffer->data.data4 >> 16) & 0x0000FFFF;
+
+#if VERBOSE
+		pr_info("\n%s: sflash status %x %x %x %x\n", __func__,
+					dma_buffer->data.sfstat[0],
+					dma_buffer->data.sfstat[1],
+					dma_buffer->data.sfstat[2],
+					dma_buffer->data.sfstat[3]);
+
+		pr_info("%s: controller_status = %x\n", __func__,
+					controller_status);
+		pr_info("%s: interrupt_status = %x\n", __func__,
+					interrupt_status);
+		pr_info("%s: write_prot_status = %x\n", __func__,
+					write_prot_status);
+#endif
+		/* Check for errors, protection violations etc */
+		if ((controller_status != 0)
+				|| (dma_buffer->data.sfstat[0] & 0x110)
+				|| (dma_buffer->data.sfstat[1] & 0x110)
+				|| (dma_buffer->data.sfstat[2] & 0x110)
+				|| (dma_buffer->data.sfstat[3] & 0x110)) {
+			pr_err("%s: ECC/MPU/OP error\n", __func__);
+			err = -EIO;
+		}
+
+		if (!(write_prot_status & ONENAND_WP_US)) {
+			pr_err("%s: Unexpected status ofs = 0x%llx,"
+				"wp_status = %x\n",
+				__func__, ofs, write_prot_status);
+			err = -EIO;
+		}
+
+		if (err)
+			break;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+#if VERBOSE
+	pr_info("\n%s: ret %d\n", __func__, err);
+	pr_info("===================================================="
+			"=============\n");
+#endif
+	return err;
+}
+
+static int msm_onenand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[20];
+		unsigned cmdptr;
+		struct {
+			uint32_t sfbcfg;
+			uint32_t sfcmd[4];
+			uint32_t sfexec;
+			uint32_t sfstat[4];
+			uint32_t addr0;
+			uint32_t addr1;
+			uint32_t addr2;
+			uint32_t addr3;
+			uint32_t addr4;
+			uint32_t addr5;
+			uint32_t addr6;
+			uint32_t data0;
+			uint32_t data1;
+			uint32_t data2;
+			uint32_t data3;
+			uint32_t data4;
+			uint32_t data5;
+			uint32_t data6;
+		} data;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	int err = 0;
+
+	uint16_t onenand_startaddr1;
+	uint16_t onenand_startaddr8;
+	uint16_t onenand_startaddr2;
+	uint16_t onenand_startblock;
+
+	uint16_t controller_status;
+	uint16_t interrupt_status;
+	uint16_t write_prot_status;
+
+	uint64_t start_ofs;
+
+#if VERBOSE
+	pr_info("===================================================="
+			"=============\n");
+	pr_info("%s: ofs 0x%llx len %lld\n", __func__, ofs, len);
+#endif
+	/* 'ofs' & 'len' should align to block size */
+	if (ofs&(mtd->erasesize - 1)) {
+		pr_err("%s: Unsupported ofs address, 0x%llx\n",
+				__func__, ofs);
+		return -EINVAL;
+	}
+
+	if (len&(mtd->erasesize - 1)) {
+		pr_err("%s: Unsupported len, %lld\n",
+				__func__, len);
+		return -EINVAL;
+	}
+
+	if (ofs+len > mtd->size) {
+		pr_err("%s: Maximum chip size exceeded\n", __func__);
+		return -EINVAL;
+	}
+
+	wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer
+				(chip, sizeof(*dma_buffer))));
+
+	for (start_ofs = ofs; ofs < start_ofs+len; ofs = ofs+mtd->erasesize) {
+#if VERBOSE
+		pr_info("%s: ofs 0x%llx len %lld\n", __func__, ofs, len);
+#endif
+
+		cmd = dma_buffer->cmd;
+		if ((onenand_info.device_id & ONENAND_DEVICE_IS_DDP)
+			&& (ofs >= (mtd->size>>1))) { /* DDP Device */
+			onenand_startaddr1 = DEVICE_FLASHCORE_1 |
+				(((uint32_t)(ofs - (mtd->size>>1))
+						/ mtd->erasesize));
+			onenand_startaddr2 = DEVICE_BUFFERRAM_1;
+			onenand_startblock = ((uint32_t)(ofs - (mtd->size>>1))
+						/ mtd->erasesize);
+		} else {
+			onenand_startaddr1 = DEVICE_FLASHCORE_0 |
+					((uint32_t)ofs / mtd->erasesize) ;
+			onenand_startaddr2 = DEVICE_BUFFERRAM_0;
+			onenand_startblock = ((uint32_t)ofs
+						/ mtd->erasesize);
+		}
+
+		onenand_startaddr8 = 0x0000;
+		dma_buffer->data.sfbcfg = SFLASH_BCFG |
+					(nand_sfcmd_mode ? 0 : (1 << 24));
+		dma_buffer->data.sfcmd[0] = SFLASH_PREPCMD(7, 0, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfcmd[1] = SFLASH_PREPCMD(0, 0, 32,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_INTHI);
+		dma_buffer->data.sfcmd[2] = SFLASH_PREPCMD(3, 7, 0,
+							MSM_NAND_SFCMD_DATXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGRD);
+		dma_buffer->data.sfcmd[3] = SFLASH_PREPCMD(4, 10, 0,
+							MSM_NAND_SFCMD_CMDXS,
+							nand_sfcmd_mode,
+							MSM_NAND_SFCMD_REGWR);
+		dma_buffer->data.sfexec = 1;
+		dma_buffer->data.sfstat[0] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[1] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[2] = CLEAN_DATA_32;
+		dma_buffer->data.sfstat[3] = CLEAN_DATA_32;
+		dma_buffer->data.addr0 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr1 = (ONENAND_START_ADDRESS_8 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.addr2 = (ONENAND_START_BLOCK_ADDRESS << 16) |
+						(ONENAND_START_ADDRESS_2);
+		dma_buffer->data.addr3 = (ONENAND_WRITE_PROT_STATUS << 16) |
+						(ONENAND_COMMAND);
+		dma_buffer->data.addr4 = (ONENAND_CONTROLLER_STATUS << 16) |
+						(ONENAND_INTERRUPT_STATUS);
+		dma_buffer->data.addr5 = (ONENAND_INTERRUPT_STATUS << 16) |
+						(ONENAND_SYSTEM_CONFIG_1);
+		dma_buffer->data.addr6 = (ONENAND_START_ADDRESS_3 << 16) |
+						(ONENAND_START_ADDRESS_1);
+		dma_buffer->data.data0 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data1 = (onenand_startaddr8 << 16) |
+						(onenand_startaddr1);
+		dma_buffer->data.data2 = (onenand_startblock << 16) |
+						(onenand_startaddr2);
+		dma_buffer->data.data3 = (CLEAN_DATA_16 << 16) |
+						(ONENAND_CMD_LOCK);
+		dma_buffer->data.data4 = (CLEAN_DATA_16 << 16) |
+						(CLEAN_DATA_16);
+		dma_buffer->data.data5 = (ONENAND_CLRINTR << 16) |
+				(ONENAND_SYSCFG1_ECCENA(nand_sfcmd_mode));
+		dma_buffer->data.data6 = (ONENAND_STARTADDR3_RES << 16) |
+						(ONENAND_STARTADDR1_RES);
+
+		/*************************************************************/
+		/* Write the necessary address reg in the onenand device     */
+		/*************************************************************/
+
+		/* Enable and configure the SFlash controller */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfbcfg);
+		cmd->dst = MSM_NAND_SFLASHC_BURST_CFG;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[0]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the ADDR0 and ADDR1 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr0);
+		cmd->dst = MSM_NAND_ADDR0;
+		cmd->len = 8;
+		cmd++;
+
+		/* Write the ADDR2 ADDR3 ADDR4 ADDR5 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr2);
+		cmd->dst = MSM_NAND_ADDR2;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the ADDR6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.addr6);
+		cmd->dst = MSM_NAND_ADDR6;
+		cmd->len = 4;
+		cmd++;
+
+		/* Write the GENP0, GENP1, GENP2, GENP3, GENP4 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data0);
+		cmd->dst = MSM_NAND_GENP_REG0;
+		cmd->len = 16;
+		cmd++;
+
+		/* Write the FLASH_DEV_CMD4,5,6 registers */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->dst = MSM_NAND_DEV_CMD4;
+		cmd->len = 12;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[0]);
+		cmd->len = 4;
+		cmd++;
+
+		/*************************************************************/
+		/* Wait for the interrupt from the Onenand device controller */
+		/*************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[1]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[1]);
+		cmd->len = 4;
+		cmd++;
+
+		/*********************************************************/
+		/* Read the necessary status reg from the onenand device */
+		/*********************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[2]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[2]);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the GENP3 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_GENP_REG3;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data3);
+		cmd->len = 4;
+		cmd++;
+
+		/* Read the DEVCMD4 register */
+		cmd->cmd = 0;
+		cmd->src = MSM_NAND_DEV_CMD4;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.data4);
+		cmd->len = 4;
+		cmd++;
+
+		/************************************************************/
+		/* Restore the necessary registers to proper values         */
+		/************************************************************/
+
+		/* Block on cmd ready and write CMD register */
+		cmd->cmd = DST_CRCI_NAND_CMD;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfcmd[3]);
+		cmd->dst = MSM_NAND_SFLASHC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Kick the execute command */
+		cmd->cmd = 0;
+		cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.sfexec);
+		cmd->dst = MSM_NAND_SFLASHC_EXEC_CMD;
+		cmd->len = 4;
+		cmd++;
+
+		/* Block on data ready, and read the status register */
+		cmd->cmd = SRC_CRCI_NAND_DATA;
+		cmd->src = MSM_NAND_SFLASHC_STATUS;
+		cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.sfstat[3]);
+		cmd->len = 4;
+		cmd++;
+
+
+		BUILD_BUG_ON(20 != ARRAY_SIZE(dma_buffer->cmd));
+		BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+		dma_buffer->cmd[0].cmd |= CMD_OCB;
+		cmd[-1].cmd |= CMD_OCU | CMD_LC;
+
+		dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd)
+				>> 3) | CMD_PTR_LP;
+
+		mb();
+		msm_dmov_exec_cmd(chip->dma_channel,
+			DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+				&dma_buffer->cmdptr)));
+		mb();
+
+		write_prot_status = (dma_buffer->data.data3 >> 16) & 0x0000FFFF;
+		interrupt_status = (dma_buffer->data.data4 >> 0) & 0x0000FFFF;
+		controller_status = (dma_buffer->data.data4 >> 16) & 0x0000FFFF;
+
+#if VERBOSE
+		pr_info("\n%s: sflash status %x %x %x %x\n", __func__,
+					dma_buffer->data.sfstat[0],
+					dma_buffer->data.sfstat[1],
+					dma_buffer->data.sfstat[2],
+					dma_buffer->data.sfstat[3]);
+
+		pr_info("%s: controller_status = %x\n", __func__,
+					controller_status);
+		pr_info("%s: interrupt_status = %x\n", __func__,
+					interrupt_status);
+		pr_info("%s: write_prot_status = %x\n", __func__,
+					write_prot_status);
+#endif
+		/* Check for errors, protection violations etc */
+		if ((controller_status != 0)
+				|| (dma_buffer->data.sfstat[0] & 0x110)
+				|| (dma_buffer->data.sfstat[1] & 0x110)
+				|| (dma_buffer->data.sfstat[2] & 0x110)
+				|| (dma_buffer->data.sfstat[3] & 0x110)) {
+			pr_err("%s: ECC/MPU/OP error\n", __func__);
+			err = -EIO;
+		}
+
+		if (!(write_prot_status & ONENAND_WP_LS)) {
+			pr_err("%s: Unexpected status ofs = 0x%llx,"
+				"wp_status = %x\n",
+				__func__, ofs, write_prot_status);
+			err = -EIO;
+		}
+
+		if (err)
+			break;
+	}
+
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+
+#if VERBOSE
+	pr_info("\n%s: ret %d\n", __func__, err);
+	pr_info("===================================================="
+			"=============\n");
+#endif
+	return err;
+}
+
+static int msm_onenand_suspend(struct mtd_info *mtd)
+{
+	return 0;
+}
+
+static void msm_onenand_resume(struct mtd_info *mtd)
+{
+}
+
+int msm_onenand_scan(struct mtd_info *mtd, int maxchips)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	/* Probe and check whether onenand device is present */
+	if (flash_onenand_probe(chip))
+		return -ENODEV;
+
+	mtd->size = 0x1000000 << ((onenand_info.device_id & 0xF0) >> 4);
+	mtd->writesize = onenand_info.data_buf_size;
+	mtd->oobsize = mtd->writesize >> 5;
+	mtd->erasesize = mtd->writesize << 6;
+	mtd->oobavail = msm_onenand_oob_64.oobavail;
+	mtd->ecclayout = &msm_onenand_oob_64;
+
+	mtd->type = MTD_NANDFLASH;
+	mtd->flags = MTD_CAP_NANDFLASH;
+	mtd->_erase = msm_onenand_erase;
+	mtd->_point = NULL;
+	mtd->_unpoint = NULL;
+	mtd->_read = msm_onenand_read;
+	mtd->_write = msm_onenand_write;
+	mtd->_read_oob = msm_onenand_read_oob;
+	mtd->_write_oob = msm_onenand_write_oob;
+	mtd->_lock = msm_onenand_lock;
+	mtd->_unlock = msm_onenand_unlock;
+	mtd->_suspend = msm_onenand_suspend;
+	mtd->_resume = msm_onenand_resume;
+	mtd->_block_isbad = msm_onenand_block_isbad;
+	mtd->_block_markbad = msm_onenand_block_markbad;
+	mtd->owner = THIS_MODULE;
+
+	pr_info("Found a supported onenand device\n");
+
+	return 0;
+}
+
+static const unsigned int bch_sup_cntrl[] = {
+	0x307, /* MSM7x2xA */
+	0x4030, /* MDM 9x15 */
+};
+
+static inline bool msm_nand_has_bch_ecc_engine(unsigned int hw_id)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bch_sup_cntrl); i++) {
+		if (hw_id == bch_sup_cntrl[i])
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * msm_nand_scan - [msm_nand Interface] Scan for the msm_nand device
+ * @param mtd		MTD device structure
+ * @param maxchips	Number of chips to scan for
+ *
+ * This fills out all the not initialized function pointers
+ * with the defaults.
+ * The flash ID is read and the mtd/chip structures are
+ * filled with the appropriate values.
+ */
+int msm_nand_scan(struct mtd_info *mtd, int maxchips)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+	uint32_t flash_id = 0, i, mtd_writesize;
+	uint8_t dev_found = 0;
+	uint8_t wide_bus;
+	uint32_t manid;
+	uint32_t devid;
+	uint32_t devcfg;
+	struct nand_flash_dev *flashdev = NULL;
+	struct nand_manufacturers  *flashman = NULL;
+	unsigned int hw_id;
+
+	/*
+	 * Some Spansion parts, like the S34MS04G2, requires that the
+	 * NAND Flash be reset before issuing an ONFI probe.
+	 */
+	flash_reset(chip);
+
+	/* Probe the Flash device for ONFI compliance */
+	if (!flash_onfi_probe(chip)) {
+		dev_found = 1;
+	} else {
+		/* Read the Flash ID from the Nand Flash Device */
+		flash_id = flash_read_id(chip);
+		manid = flash_id & 0xFF;
+		devid = (flash_id >> 8) & 0xFF;
+		devcfg = (flash_id >> 24) & 0xFF;
+
+		for (i = 0; !flashman && nand_manuf_ids[i].id; ++i)
+			if (nand_manuf_ids[i].id == manid)
+				flashman = &nand_manuf_ids[i];
+		for (i = 0; !flashdev && nand_flash_ids[i].id; ++i)
+			if (nand_flash_ids[i].id == devid)
+				flashdev = &nand_flash_ids[i];
+		if (!flashdev || !flashman) {
+			pr_err("ERROR: unknown nand device manuf=%x devid=%x\n",
+				manid, devid);
+			return -ENOENT;
+		} else
+			dev_found = 1;
+
+		if (!flashdev->pagesize) {
+			supported_flash.flash_id = flash_id;
+			supported_flash.density = flashdev->chipsize << 20;
+			supported_flash.widebus = devcfg & (1 << 6) ? 1 : 0;
+			supported_flash.pagesize = 1024 << (devcfg & 0x3);
+			supported_flash.blksize = (64 * 1024) <<
+							((devcfg >> 4) & 0x3);
+			supported_flash.oobsize = (8 << ((devcfg >> 2) & 0x3)) *
+				(supported_flash.pagesize >> 9);
+
+			if ((supported_flash.oobsize > 64) &&
+				(supported_flash.pagesize == 2048)) {
+				pr_info("msm_nand: Found a 2K page device with"
+					" %d oobsize - changing oobsize to 64 "
+					"bytes.\n", supported_flash.oobsize);
+				supported_flash.oobsize = 64;
+			}
+		} else {
+			supported_flash.flash_id = flash_id;
+			supported_flash.density = flashdev->chipsize << 20;
+			supported_flash.widebus = flashdev->options &
+					 NAND_BUSWIDTH_16 ? 1 : 0;
+			supported_flash.pagesize = flashdev->pagesize;
+			supported_flash.blksize = flashdev->erasesize;
+			supported_flash.oobsize = flashdev->pagesize >> 5;
+		}
+	}
+
+	if (dev_found) {
+		(!interleave_enable) ? (i = 1) : (i = 2);
+		wide_bus       = supported_flash.widebus;
+		mtd->size      = supported_flash.density  * i;
+		mtd->writesize = supported_flash.pagesize * i;
+		mtd->oobsize   = supported_flash.oobsize  * i;
+		mtd->erasesize = supported_flash.blksize  * i;
+		mtd->writebufsize = mtd->writesize;
+
+		if (!interleave_enable)
+			mtd_writesize = mtd->writesize;
+		else
+			mtd_writesize = mtd->writesize >> 1;
+
+		/* Check whether controller and NAND device support 8bit ECC*/
+		hw_id = flash_rd_reg(chip, MSM_NAND_HW_INFO);
+		if (msm_nand_has_bch_ecc_engine(hw_id)
+				&& (supported_flash.ecc_correctability >= 8)) {
+			pr_info("Found supported NAND device for %dbit ECC\n",
+					supported_flash.ecc_correctability);
+			enable_bch_ecc = 1;
+		} else {
+			pr_info("Found a supported NAND device\n");
+		}
+		pr_info("NAND Controller ID : 0x%x\n", hw_id);
+		pr_info("NAND Device ID  : 0x%x\n", supported_flash.flash_id);
+		pr_info("Buswidth : %d Bits\n", (wide_bus) ? 16 : 8);
+		pr_info("Density  : %lld MByte\n", (mtd->size>>20));
+		pr_info("Pagesize : %d Bytes\n", mtd->writesize);
+		pr_info("Erasesize: %d Bytes\n", mtd->erasesize);
+		pr_info("Oobsize  : %d Bytes\n", mtd->oobsize);
+	} else {
+		pr_err("Unsupported Nand,Id: 0x%x \n", flash_id);
+		return -ENODEV;
+	}
+
+	/* Size of each codeword is 532Bytes incase of 8bit BCH ECC*/
+	chip->cw_size = enable_bch_ecc ? 532 : 528;
+	chip->CFG0 = (((mtd_writesize >> 9)-1) << 6) /* 4/8 cw/pg for 2/4k */
+		|  (516 <<  9)  /* 516 user data bytes */
+		|   (10 << 19)  /* 10 parity bytes */
+		|    (5 << 27)  /* 5 address cycles */
+		|    (0 << 30)  /* Do not read status before data */
+		|    (1 << 31)  /* Send read cmd */
+		/* 0 spare bytes for 16 bit nand or 1/2 spare bytes for 8 bit */
+		| (wide_bus ? 0 << 23 : (enable_bch_ecc ? 2 << 23 : 1 << 23));
+
+	chip->CFG1 = (0 <<  0)  /* Enable ecc */
+		|    (7 <<  2)  /* 8 recovery cycles */
+		|    (0 <<  5)  /* Allow CS deassertion */
+		/* Bad block marker location */
+		|  ((mtd_writesize - (chip->cw_size * (
+					(mtd_writesize >> 9) - 1)) + 1) <<  6)
+		|    (0 << 16)  /* Bad block in user data area */
+		|    (2 << 17)  /* 6 cycle tWB/tRB */
+		| ((wide_bus) ? CFG1_WIDE_FLASH : 0); /* Wide flash bit */
+
+	chip->ecc_buf_cfg = 0x203;
+	chip->CFG0_RAW = 0xA80420C0;
+	chip->CFG1_RAW = 0x5045D;
+
+	if (enable_bch_ecc) {
+		chip->CFG1 |= (1 << 27); /* Enable BCH engine */
+		chip->ecc_bch_cfg = (0 << 0) /* Enable ECC*/
+			|   (0 << 1) /* Enable/Disable SW reset of ECC engine */
+			|   (1 << 4) /* 8bit ecc*/
+			|   ((wide_bus) ? (14 << 8) : (13 << 8))/*parity bytes*/
+			|   (516 << 16) /* 516 user data bytes */
+			|   (1 << 30); /* Turn on ECC engine clocks always */
+		chip->CFG0_RAW = 0xA80428C0; /* CW size is increased to 532B */
+	}
+
+	/*
+	 * For 4bit RS ECC (default ECC), parity bytes = 10 (for x8 and x16 I/O)
+	 * For 8bit BCH ECC, parity bytes = 13 (x8) or 14 (x16 I/O).
+	 */
+	chip->ecc_parity_bytes = enable_bch_ecc ? (wide_bus ? 14 : 13) : 10;
+
+	pr_info("CFG0 Init  : 0x%08x\n", chip->CFG0);
+	pr_info("CFG1 Init  : 0x%08x\n", chip->CFG1);
+	pr_info("ECCBUFCFG  : 0x%08x\n", chip->ecc_buf_cfg);
+
+	if (mtd->oobsize == 64) {
+		mtd->oobavail = msm_nand_oob_64.oobavail;
+		mtd->ecclayout = &msm_nand_oob_64;
+	} else if (mtd->oobsize == 128) {
+		mtd->oobavail = msm_nand_oob_128.oobavail;
+		mtd->ecclayout = &msm_nand_oob_128;
+	} else if (mtd->oobsize == 224) {
+		mtd->oobavail = wide_bus ? msm_nand_oob_224_x16.oobavail :
+			msm_nand_oob_224_x8.oobavail;
+		mtd->ecclayout = wide_bus ? &msm_nand_oob_224_x16 :
+			&msm_nand_oob_224_x8;
+	} else if (mtd->oobsize == 256) {
+		mtd->oobavail = msm_nand_oob_256.oobavail;
+		mtd->ecclayout = &msm_nand_oob_256;
+	} else {
+		pr_err("Unsupported Nand, oobsize: 0x%x \n",
+		       mtd->oobsize);
+		return -ENODEV;
+	}
+
+	/* Fill in remaining MTD driver data */
+	mtd->type = MTD_NANDFLASH;
+	mtd->flags = MTD_CAP_NANDFLASH;
+	/* mtd->ecctype = MTD_ECC_SW; */
+	mtd->_erase = msm_nand_erase;
+	mtd->_block_isbad = msm_nand_block_isbad;
+	mtd->_block_markbad = msm_nand_block_markbad;
+	mtd->_point = NULL;
+	mtd->_unpoint = NULL;
+	mtd->_read = msm_nand_read;
+	mtd->_write = msm_nand_write;
+	mtd->_read_oob  = msm_nand_read_oob;
+	mtd->_write_oob = msm_nand_write_oob;
+	if (dual_nand_ctlr_present) {
+		mtd->_read_oob = msm_nand_read_oob_dualnandc;
+		mtd->_write_oob = msm_nand_write_oob_dualnandc;
+		if (interleave_enable) {
+			mtd->_erase = msm_nand_erase_dualnandc;
+			mtd->_block_isbad = msm_nand_block_isbad_dualnandc;
+		}
+	}
+
+	/* mtd->sync = msm_nand_sync; */
+	mtd->_lock = NULL;
+	/* mtd->_unlock = msm_nand_unlock; */
+	mtd->_suspend = msm_nand_suspend;
+	mtd->_resume = msm_nand_resume;
+	mtd->owner = THIS_MODULE;
+
+	/* Unlock whole block */
+	/* msm_nand_unlock_all(mtd); */
+
+	/* return this->scan_bbt(mtd); */
+	return 0;
+}
+EXPORT_SYMBOL_GPL(msm_nand_scan);
+
+/**
+ * msm_nand_release - [msm_nand Interface] Free resources held by the msm_nand device
+ * @param mtd		MTD device structure
+ */
+void msm_nand_release(struct mtd_info *mtd)
+{
+	/* struct msm_nand_chip *this = mtd->priv; */
+
+	/* Deregister the device */
+	mtd_device_unregister(mtd);
+}
+EXPORT_SYMBOL_GPL(msm_nand_release);
+
+struct msm_nand_info {
+	struct mtd_info		mtd;
+	struct mtd_partition	*parts;
+	struct msm_nand_chip	msm_nand;
+};
+
+/* duplicating the NC01 XFR contents to NC10 */
+static int msm_nand_nc10_xfr_settings(struct mtd_info *mtd)
+{
+	struct msm_nand_chip *chip = mtd->priv;
+
+	struct {
+		dmov_s cmd[2];
+		unsigned cmdptr;
+	} *dma_buffer;
+	dmov_s *cmd;
+
+	wait_event(chip->wait_queue,
+		(dma_buffer = msm_nand_get_dma_buffer(
+				chip, sizeof(*dma_buffer))));
+
+	cmd = dma_buffer->cmd;
+
+	/* Copying XFR register contents from NC01 --> NC10 */
+	cmd->cmd = 0;
+	cmd->src = NC01(MSM_NAND_XFR_STEP1);
+	cmd->dst = NC10(MSM_NAND_XFR_STEP1);
+	cmd->len = 28;
+	cmd++;
+
+	BUILD_BUG_ON(2 != ARRAY_SIZE(dma_buffer->cmd));
+	BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
+	dma_buffer->cmd[0].cmd |= CMD_OCB;
+	cmd[-1].cmd |= CMD_OCU | CMD_LC;
+	dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd) >> 3)
+				| CMD_PTR_LP;
+
+	mb();
+	msm_dmov_exec_cmd(chip->dma_channel, DMOV_CMD_PTR_LIST
+			| DMOV_CMD_ADDR(msm_virt_to_dma(chip,
+			&dma_buffer->cmdptr)));
+	mb();
+	msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
+	return 0;
+}
+
+static ssize_t boot_layout_show(struct device *dev,
+                                  struct device_attribute *attr,
+                                  char *buf)
+{
+	return sprintf(buf, "%d\n", boot_layout);
+}
+
+static ssize_t boot_layout_store(struct device *dev,
+                                   struct device_attribute *attr,
+                                   const char *buf, size_t n)
+{
+	struct msm_nand_info *info = dev_get_drvdata(dev);
+	struct msm_nand_chip *chip = info->mtd.priv;
+	unsigned int ud_size;
+	unsigned int spare_size;
+	unsigned int ecc_num_data_bytes;
+
+	sscanf(buf, "%d", &boot_layout);
+
+	ud_size = boot_layout? 512: 516;
+	spare_size = boot_layout? (chip->cw_size -
+					(chip->ecc_parity_bytes+ 1+ ud_size)):
+					(enable_bch_ecc ? 2 : 1);
+	ecc_num_data_bytes = boot_layout? 512: 516;
+
+	chip->CFG0 = (chip->CFG0 & ~SPARE_SIZE_BYTES_MASK);
+	chip->CFG0 |= (spare_size << 23);
+
+	chip->CFG0 = (chip->CFG0 & ~UD_SIZE_BYTES_MASK);
+	chip->CFG0 |= (ud_size << 9);
+
+	chip->ecc_buf_cfg = (chip->ecc_buf_cfg & ~ECC_NUM_DATA_BYTES_MASK)
+				| (ecc_num_data_bytes << 16);
+
+	return n;
+}
+
+static const DEVICE_ATTR(boot_layout, 0644, boot_layout_show, boot_layout_store);
+
+static int msm_nand_probe(struct platform_device *pdev)
+
+{
+        struct msm_nand_info *info;
+	struct resource *res;
+	int err;
+	struct mtd_part_parser_data ppdata = {};
+
+
+	res = platform_get_resource(pdev,
+					IORESOURCE_MEM, 0);
+	if (!res || !res->start) {
+		pr_err("%s: msm_nand_phys resource invalid/absent\n",
+				__func__);
+		return -ENODEV;
+	}
+	msm_nand_phys = res->start;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(struct msm_nand_info), GFP_KERNEL);
+	if (!info) {
+		pr_err("%s: No memory for msm_nand_info\n", __func__);
+		return -ENOMEM;
+	}
+
+	info->msm_nand.dev = &pdev->dev;
+
+	init_waitqueue_head(&info->msm_nand.wait_queue);
+
+	info->msm_nand.dma_channel = 3;
+	pr_info("%s: dmac 0x%x\n", __func__, info->msm_nand.dma_channel);
+
+	/* this currently fails if dev is passed in */
+	info->msm_nand.dma_buffer =
+		dma_alloc_coherent(/*dev*/ NULL, MSM_NAND_DMA_BUFFER_SIZE,
+				&info->msm_nand.dma_addr, GFP_KERNEL);
+	if (info->msm_nand.dma_buffer == NULL) {
+		pr_err("%s: No memory for msm_nand.dma_buffer\n", __func__);
+		err = -ENOMEM;
+		goto out_free_info;
+	}
+
+	pr_info("%s: allocated dma buffer at %p, dma_addr %x\n",
+		__func__, info->msm_nand.dma_buffer, info->msm_nand.dma_addr);
+
+	/* Let default be VERSION_1 for backward compatibility */
+	info->msm_nand.uncorrectable_bit_mask = BIT(8);
+	info->msm_nand.num_err_mask = 0x1F;
+
+	info->mtd.name = dev_name(&pdev->dev);
+	info->mtd.priv = &info->msm_nand;
+	info->mtd.owner = THIS_MODULE;
+
+	/* config ebi2_cfg register only for ping pong mode!!! */
+	if (!interleave_enable && dual_nand_ctlr_present)
+		flash_wr_reg(&info->msm_nand, EBI2_CFG_REG, 0x4010080);
+
+	if (dual_nand_ctlr_present)
+		msm_nand_nc10_xfr_settings(&info->mtd);
+
+	if (msm_nand_scan(&info->mtd, 1))
+		if (msm_onenand_scan(&info->mtd, 1)) {
+			pr_err("%s: No nand device found\n", __func__);
+			err = -ENXIO;
+			goto out_free_dma_buffer;
+		}
+
+	flash_wr_reg(&info->msm_nand, MSM_NAND_DEV_CMD_VLD,
+				DEV_CMD_VLD_SEQ_READ_START_VLD |
+				DEV_CMD_VLD_ERASE_START_VLD |
+				DEV_CMD_VLD_WRITE_START_VLD |
+				DEV_CMD_VLD_READ_START_VLD);
+
+	ppdata.of_node = pdev->dev.of_node;
+	err = mtd_device_parse_register(&info->mtd, NULL, &ppdata, NULL, 0);
+
+	if (err < 0) {
+		pr_err("%s: mtd_device_parse_register failed with err=%d\n",
+				__func__, err);
+		goto out_free_dma_buffer;
+	}
+
+	err = sysfs_create_file(&pdev->dev.kobj, &dev_attr_boot_layout.attr);
+	if (err)
+		goto out_free_dma_buffer;
+
+	dev_set_drvdata(&pdev->dev, info);
+
+	return 0;
+
+out_free_dma_buffer:
+	dma_free_coherent(NULL, MSM_NAND_DMA_BUFFER_SIZE,
+			info->msm_nand.dma_buffer,
+			info->msm_nand.dma_addr);
+out_free_info:
+	return err;
+}
+
+static int msm_nand_remove(struct platform_device *pdev)
+{
+	struct msm_nand_info *info = dev_get_drvdata(&pdev->dev);
+
+	dev_set_drvdata(&pdev->dev, NULL);
+
+	if (info) {
+		msm_nand_release(&info->mtd);
+		dma_free_coherent(NULL, MSM_NAND_DMA_BUFFER_SIZE,
+				  info->msm_nand.dma_buffer,
+				  info->msm_nand.dma_addr);
+	}
+
+	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_boot_layout.attr);
+
+	return 0;
+}
+
+
+#ifdef CONFIG_OF
+static const struct of_device_id msm_nand_of_match[] = {
+        { .compatible = "qcom,qcom_nand", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, msm_nand_of_match);
+#endif
+
+
+static struct platform_driver msm_nand_driver = {
+	.probe		= msm_nand_probe,
+	.remove		= msm_nand_remove,
+	.driver = {
+		.name		= "qcom_nand",
+		.owner		= THIS_MODULE,
+                .of_match_table = msm_nand_of_match,
+	}
+};
+
+
+module_platform_driver(msm_nand_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("msm_nand flash driver code");
--- /dev/null
+++ b/drivers/mtd/nand/qcom_nand.h
@@ -0,0 +1,196 @@
+/* drivers/mtd/devices/msm_nand.h
+ *
+ * Copyright (c) 2008-2011, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DRIVERS_MTD_DEVICES_MSM_NAND_H
+#define __DRIVERS_MTD_DEVICES_MSM_NAND_H
+
+extern unsigned long msm_nand_phys;
+extern unsigned long msm_nandc01_phys;
+extern unsigned long msm_nandc10_phys;
+extern unsigned long msm_nandc11_phys;
+extern unsigned long ebi2_register_base;
+
+#define NC01(X) ((X) + msm_nandc01_phys - msm_nand_phys)
+#define NC10(X) ((X) + msm_nandc10_phys - msm_nand_phys)
+#define NC11(X) ((X) + msm_nandc11_phys - msm_nand_phys)
+
+#define MSM_NAND_REG(off) (msm_nand_phys + (off))
+
+#define MSM_NAND_FLASH_CMD            MSM_NAND_REG(0x0000)
+#define MSM_NAND_ADDR0                MSM_NAND_REG(0x0004)
+#define MSM_NAND_ADDR1                MSM_NAND_REG(0x0008)
+#define MSM_NAND_FLASH_CHIP_SELECT    MSM_NAND_REG(0x000C)
+#define MSM_NAND_EXEC_CMD             MSM_NAND_REG(0x0010)
+#define MSM_NAND_FLASH_STATUS         MSM_NAND_REG(0x0014)
+#define MSM_NAND_BUFFER_STATUS        MSM_NAND_REG(0x0018)
+#define MSM_NAND_SFLASHC_STATUS       MSM_NAND_REG(0x001C)
+#define MSM_NAND_DEV0_CFG0            MSM_NAND_REG(0x0020)
+#define MSM_NAND_DEV0_CFG1            MSM_NAND_REG(0x0024)
+#define MSM_NAND_DEV0_ECC_CFG	      MSM_NAND_REG(0x0028)
+#define MSM_NAND_DEV1_ECC_CFG	      MSM_NAND_REG(0x002C)
+#define MSM_NAND_DEV1_CFG0            MSM_NAND_REG(0x0030)
+#define MSM_NAND_DEV1_CFG1            MSM_NAND_REG(0x0034)
+#define MSM_NAND_SFLASHC_CMD          MSM_NAND_REG(0x0038)
+#define MSM_NAND_SFLASHC_EXEC_CMD     MSM_NAND_REG(0x003C)
+#define MSM_NAND_READ_ID              MSM_NAND_REG(0x0040)
+#define MSM_NAND_READ_STATUS          MSM_NAND_REG(0x0044)
+#define MSM_NAND_CONFIG_DATA          MSM_NAND_REG(0x0050)
+#define MSM_NAND_CONFIG               MSM_NAND_REG(0x0054)
+#define MSM_NAND_CONFIG_MODE          MSM_NAND_REG(0x0058)
+#define MSM_NAND_CONFIG_STATUS        MSM_NAND_REG(0x0060)
+#define MSM_NAND_MACRO1_REG           MSM_NAND_REG(0x0064)
+#define MSM_NAND_XFR_STEP1            MSM_NAND_REG(0x0070)
+#define MSM_NAND_XFR_STEP2            MSM_NAND_REG(0x0074)
+#define MSM_NAND_XFR_STEP3            MSM_NAND_REG(0x0078)
+#define MSM_NAND_XFR_STEP4            MSM_NAND_REG(0x007C)
+#define MSM_NAND_XFR_STEP5            MSM_NAND_REG(0x0080)
+#define MSM_NAND_XFR_STEP6            MSM_NAND_REG(0x0084)
+#define MSM_NAND_XFR_STEP7            MSM_NAND_REG(0x0088)
+#define MSM_NAND_GENP_REG0            MSM_NAND_REG(0x0090)
+#define MSM_NAND_GENP_REG1            MSM_NAND_REG(0x0094)
+#define MSM_NAND_GENP_REG2            MSM_NAND_REG(0x0098)
+#define MSM_NAND_GENP_REG3            MSM_NAND_REG(0x009C)
+#define MSM_NAND_DEV_CMD0             MSM_NAND_REG(0x00A0)
+#define MSM_NAND_DEV_CMD1             MSM_NAND_REG(0x00A4)
+#define MSM_NAND_DEV_CMD2             MSM_NAND_REG(0x00A8)
+#define MSM_NAND_DEV_CMD_VLD          MSM_NAND_REG(0x00AC)
+#define DEV_CMD_VLD_SEQ_READ_START_VLD		0x10
+#define DEV_CMD_VLD_ERASE_START_VLD		0x8
+#define DEV_CMD_VLD_WRITE_START_VLD		0x4
+#define DEV_CMD_VLD_READ_STOP_VLD		0x2
+#define DEV_CMD_VLD_READ_START_VLD		0x1
+
+#define MSM_NAND_EBI2_MISR_SIG_REG    MSM_NAND_REG(0x00B0)
+#define MSM_NAND_ADDR2                MSM_NAND_REG(0x00C0)
+#define MSM_NAND_ADDR3                MSM_NAND_REG(0x00C4)
+#define MSM_NAND_ADDR4                MSM_NAND_REG(0x00C8)
+#define MSM_NAND_ADDR5                MSM_NAND_REG(0x00CC)
+#define MSM_NAND_DEV_CMD3             MSM_NAND_REG(0x00D0)
+#define MSM_NAND_DEV_CMD4             MSM_NAND_REG(0x00D4)
+#define MSM_NAND_DEV_CMD5             MSM_NAND_REG(0x00D8)
+#define MSM_NAND_DEV_CMD6             MSM_NAND_REG(0x00DC)
+#define MSM_NAND_SFLASHC_BURST_CFG    MSM_NAND_REG(0x00E0)
+#define MSM_NAND_ADDR6                MSM_NAND_REG(0x00E4)
+#define MSM_NAND_EBI2_ECC_BUF_CFG     MSM_NAND_REG(0x00F0)
+#define MSM_NAND_HW_INFO	      MSM_NAND_REG(0x00FC)
+#define MSM_NAND_FLASH_BUFFER         MSM_NAND_REG(0x0100)
+
+/* device commands */
+
+#define MSM_NAND_CMD_SOFT_RESET         0x01
+#define MSM_NAND_CMD_PAGE_READ          0x32
+#define MSM_NAND_CMD_PAGE_READ_ECC      0x33
+#define MSM_NAND_CMD_PAGE_READ_ALL      0x34
+#define MSM_NAND_CMD_SEQ_PAGE_READ      0x15
+#define MSM_NAND_CMD_PRG_PAGE           0x36
+#define MSM_NAND_CMD_PRG_PAGE_ECC       0x37
+#define MSM_NAND_CMD_PRG_PAGE_ALL       0x39
+#define MSM_NAND_CMD_BLOCK_ERASE        0x3A
+#define MSM_NAND_CMD_FETCH_ID           0x0B
+#define MSM_NAND_CMD_STATUS             0x0C
+#define MSM_NAND_CMD_RESET              0x0D
+
+/* Sflash Commands */
+
+#define MSM_NAND_SFCMD_DATXS            0x0
+#define MSM_NAND_SFCMD_CMDXS            0x1
+#define MSM_NAND_SFCMD_BURST            0x0
+#define MSM_NAND_SFCMD_ASYNC            0x1
+#define MSM_NAND_SFCMD_ABORT            0x1
+#define MSM_NAND_SFCMD_REGRD            0x2
+#define MSM_NAND_SFCMD_REGWR            0x3
+#define MSM_NAND_SFCMD_INTLO            0x4
+#define MSM_NAND_SFCMD_INTHI            0x5
+#define MSM_NAND_SFCMD_DATRD            0x6
+#define MSM_NAND_SFCMD_DATWR            0x7
+
+#define SFLASH_PREPCMD(numxfr, offval, delval, trnstp, mode, opcode) \
+	((numxfr<<20)|(offval<<12)|(delval<<6)|(trnstp<<5)|(mode<<4)|opcode)
+
+#define SFLASH_BCFG			0x20100327
+
+/* Onenand addresses */
+
+#define ONENAND_MANUFACTURER_ID		0xF000
+#define ONENAND_DEVICE_ID		0xF001
+#define ONENAND_VERSION_ID		0xF002
+#define ONENAND_DATA_BUFFER_SIZE	0xF003
+#define ONENAND_BOOT_BUFFER_SIZE	0xF004
+#define ONENAND_AMOUNT_OF_BUFFERS	0xF005
+#define ONENAND_TECHNOLOGY		0xF006
+#define ONENAND_START_ADDRESS_1		0xF100
+#define ONENAND_START_ADDRESS_2		0xF101
+#define ONENAND_START_ADDRESS_3		0xF102
+#define ONENAND_START_ADDRESS_4		0xF103
+#define ONENAND_START_ADDRESS_5		0xF104
+#define ONENAND_START_ADDRESS_6		0xF105
+#define ONENAND_START_ADDRESS_7		0xF106
+#define ONENAND_START_ADDRESS_8		0xF107
+#define ONENAND_START_BUFFER		0xF200
+#define ONENAND_COMMAND			0xF220
+#define ONENAND_SYSTEM_CONFIG_1		0xF221
+#define ONENAND_SYSTEM_CONFIG_2		0xF222
+#define ONENAND_CONTROLLER_STATUS	0xF240
+#define ONENAND_INTERRUPT_STATUS	0xF241
+#define ONENAND_START_BLOCK_ADDRESS	0xF24C
+#define ONENAND_WRITE_PROT_STATUS	0xF24E
+#define ONENAND_ECC_STATUS		0xFF00
+#define ONENAND_ECC_ERRPOS_MAIN0	0xFF01
+#define ONENAND_ECC_ERRPOS_SPARE0	0xFF02
+#define ONENAND_ECC_ERRPOS_MAIN1	0xFF03
+#define ONENAND_ECC_ERRPOS_SPARE1	0xFF04
+#define ONENAND_ECC_ERRPOS_MAIN2	0xFF05
+#define ONENAND_ECC_ERRPOS_SPARE2	0xFF06
+#define ONENAND_ECC_ERRPOS_MAIN3	0xFF07
+#define ONENAND_ECC_ERRPOS_SPARE3	0xFF08
+
+/* Onenand commands */
+#define ONENAND_WP_US                   (1 << 2)
+#define ONENAND_WP_LS                   (1 << 1)
+
+#define ONENAND_CMDLOAD			0x0000
+#define ONENAND_CMDLOADSPARE		0x0013
+#define ONENAND_CMDPROG			0x0080
+#define ONENAND_CMDPROGSPARE		0x001A
+#define ONENAND_CMDERAS			0x0094
+#define ONENAND_CMD_UNLOCK              0x0023
+#define ONENAND_CMD_LOCK                0x002A
+
+#define ONENAND_SYSCFG1_ECCENA(mode)	(0x40E0 | (mode ? 0 : 0x8002))
+#define ONENAND_SYSCFG1_ECCDIS(mode)	(0x41E0 | (mode ? 0 : 0x8002))
+
+#define ONENAND_CLRINTR			0x0000
+#define ONENAND_STARTADDR1_RES		0x07FF
+#define ONENAND_STARTADDR3_RES		0x07FF
+
+#define DATARAM0_0			0x8
+#define DEVICE_FLASHCORE_0              (0 << 15)
+#define DEVICE_FLASHCORE_1              (1 << 15)
+#define DEVICE_BUFFERRAM_0              (0 << 15)
+#define DEVICE_BUFFERRAM_1              (1 << 15)
+#define ONENAND_DEVICE_IS_DDP		(1 << 3)
+
+#define CLEAN_DATA_16			0xFFFF
+#define CLEAN_DATA_32			0xFFFFFFFF
+
+#define EBI2_REG(off)   		(ebi2_register_base + (off))
+#define EBI2_CHIP_SELECT_CFG0           EBI2_REG(0x0000)
+#define EBI2_CFG_REG		       	EBI2_REG(0x0004)
+#define EBI2_NAND_ADM_MUX       	EBI2_REG(0x005C)
+
+extern struct flash_platform_data msm_nand_data;
+
+#endif