Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 1325 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/mtd/nand/raw/arasan_nfc.c b/roms/u-boot/drivers/mtd/nand/raw/arasan_nfc.c
new file mode 100644
index 000000000..4621bfb03
--- /dev/null
+++ b/roms/u-boot/drivers/mtd/nand/raw/arasan_nfc.c
@@ -0,0 +1,1325 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Arasan NAND Flash Controller Driver
+ *
+ * Copyright (C) 2014 - 2015 Xilinx, Inc.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand_ecc.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <dm.h>
+#include <nand.h>
+
+struct nand_config {
+	u32 page;
+	bool on_die_ecc_enabled;
+};
+
+struct nand_drv {
+	struct nand_regs *reg;
+	struct nand_config config;
+};
+
+struct arasan_nand_info {
+	struct udevice *dev;
+	struct nand_drv nand_ctrl;
+	struct nand_chip nand_chip;
+};
+
+struct nand_regs {
+	u32 pkt_reg;
+	u32 memadr_reg1;
+	u32 memadr_reg2;
+	u32 cmd_reg;
+	u32 pgm_reg;
+	u32 intsts_enr;
+	u32 intsig_enr;
+	u32 intsts_reg;
+	u32 rdy_busy;
+	u32 cms_sysadr_reg;
+	u32 flash_sts_reg;
+	u32 tmg_reg;
+	u32 buf_dataport;
+	u32 ecc_reg;
+	u32 ecc_errcnt_reg;
+	u32 ecc_sprcmd_reg;
+	u32 errcnt_1bitreg;
+	u32 errcnt_2bitreg;
+	u32 errcnt_3bitreg;
+	u32 errcnt_4bitreg;
+	u32 dma_sysadr0_reg;
+	u32 dma_bufbdry_reg;
+	u32 cpu_rls_reg;
+	u32 errcnt_5bitreg;
+	u32 errcnt_6bitreg;
+	u32 errcnt_7bitreg;
+	u32 errcnt_8bitreg;
+	u32 data_if_reg;
+};
+
+struct arasan_nand_command_format {
+	u8 cmd1;
+	u8 cmd2;
+	u8 addr_cycles;
+	u32 pgm;
+};
+
+#define ONDIE_ECC_FEATURE_ADDR			0x90
+#define ENABLE_ONDIE_ECC			0x08
+
+#define ARASAN_PROG_RD_MASK			0x00000001
+#define ARASAN_PROG_BLK_ERS_MASK		0x00000004
+#define ARASAN_PROG_RD_ID_MASK			0x00000040
+#define ARASAN_PROG_RD_STS_MASK			0x00000008
+#define ARASAN_PROG_PG_PROG_MASK		0x00000010
+#define ARASAN_PROG_RD_PARAM_PG_MASK		0x00000080
+#define ARASAN_PROG_RST_MASK			0x00000100
+#define ARASAN_PROG_GET_FTRS_MASK		0x00000200
+#define ARASAN_PROG_SET_FTRS_MASK		0x00000400
+#define ARASAN_PROG_CHNG_ROWADR_END_MASK	0x00400000
+
+#define ARASAN_NAND_CMD_ECC_ON_MASK		0x80000000
+#define ARASAN_NAND_CMD_CMD12_MASK		0xFFFF
+#define ARASAN_NAND_CMD_PG_SIZE_MASK		0x3800000
+#define ARASAN_NAND_CMD_PG_SIZE_SHIFT		23
+#define ARASAN_NAND_CMD_CMD2_SHIFT		8
+#define ARASAN_NAND_CMD_ADDR_CYCL_MASK		0x70000000
+#define ARASAN_NAND_CMD_ADDR_CYCL_SHIFT		28
+
+#define ARASAN_NAND_MEM_ADDR1_PAGE_MASK		0xFFFF0000
+#define ARASAN_NAND_MEM_ADDR1_COL_MASK		0xFFFF
+#define ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT	16
+#define ARASAN_NAND_MEM_ADDR2_PAGE_MASK		0xFF
+#define ARASAN_NAND_MEM_ADDR2_CS_MASK		0xC0000000
+#define ARASAN_NAND_MEM_ADDR2_CS0_MASK         (0x3 << 30)
+#define ARASAN_NAND_MEM_ADDR2_CS1_MASK         (0x1 << 30)
+#define ARASAN_NAND_MEM_ADDR2_BCH_MASK		0xE000000
+#define ARASAN_NAND_MEM_ADDR2_BCH_SHIFT		25
+
+#define ARASAN_NAND_INT_STS_ERR_EN_MASK		0x10
+#define ARASAN_NAND_INT_STS_MUL_BIT_ERR_MASK	0x08
+#define ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK	0x02
+#define ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK	0x01
+#define ARASAN_NAND_INT_STS_XFR_CMPLT_MASK	0x04
+
+#define ARASAN_NAND_PKT_REG_PKT_CNT_MASK	0xFFF000
+#define ARASAN_NAND_PKT_REG_PKT_SIZE_MASK	0x7FF
+#define ARASAN_NAND_PKT_REG_PKT_CNT_SHFT	12
+
+#define ARASAN_NAND_ROW_ADDR_CYCL_MASK		0x0F
+#define ARASAN_NAND_COL_ADDR_CYCL_MASK		0xF0
+#define ARASAN_NAND_COL_ADDR_CYCL_SHIFT		4
+
+#define ARASAN_NAND_ECC_SIZE_SHIFT		16
+#define ARASAN_NAND_ECC_BCH_SHIFT		27
+
+#define ARASAN_NAND_PKTSIZE_1K			1024
+#define ARASAN_NAND_PKTSIZE_512			512
+
+#define ARASAN_NAND_POLL_TIMEOUT		1000000
+#define ARASAN_NAND_INVALID_ADDR_CYCL		0xFF
+
+#define ERR_ADDR_CYCLE				-1
+#define READ_BUFF_SIZE				0x4000
+
+static struct arasan_nand_command_format *curr_cmd;
+
+enum addr_cycles {
+	NAND_ADDR_CYCL_NONE,
+	NAND_ADDR_CYCL_ONE,
+	NAND_ADDR_CYCL_ROW,
+	NAND_ADDR_CYCL_COL,
+	NAND_ADDR_CYCL_BOTH,
+};
+
+static struct arasan_nand_command_format arasan_nand_commands[] = {
+	{NAND_CMD_READ0, NAND_CMD_READSTART, NAND_ADDR_CYCL_BOTH,
+	 ARASAN_PROG_RD_MASK},
+	{NAND_CMD_RNDOUT, NAND_CMD_RNDOUTSTART, NAND_ADDR_CYCL_COL,
+	 ARASAN_PROG_RD_MASK},
+	{NAND_CMD_READID, NAND_CMD_NONE, NAND_ADDR_CYCL_ONE,
+	 ARASAN_PROG_RD_ID_MASK},
+	{NAND_CMD_STATUS, NAND_CMD_NONE, NAND_ADDR_CYCL_NONE,
+	 ARASAN_PROG_RD_STS_MASK},
+	{NAND_CMD_SEQIN, NAND_CMD_PAGEPROG, NAND_ADDR_CYCL_BOTH,
+	 ARASAN_PROG_PG_PROG_MASK},
+	{NAND_CMD_RNDIN, NAND_CMD_NONE, NAND_ADDR_CYCL_COL,
+	 ARASAN_PROG_CHNG_ROWADR_END_MASK},
+	{NAND_CMD_ERASE1, NAND_CMD_ERASE2, NAND_ADDR_CYCL_ROW,
+	 ARASAN_PROG_BLK_ERS_MASK},
+	{NAND_CMD_RESET, NAND_CMD_NONE, NAND_ADDR_CYCL_NONE,
+	 ARASAN_PROG_RST_MASK},
+	{NAND_CMD_PARAM, NAND_CMD_NONE, NAND_ADDR_CYCL_ONE,
+	 ARASAN_PROG_RD_PARAM_PG_MASK},
+	{NAND_CMD_GET_FEATURES, NAND_CMD_NONE, NAND_ADDR_CYCL_ONE,
+	 ARASAN_PROG_GET_FTRS_MASK},
+	{NAND_CMD_SET_FEATURES, NAND_CMD_NONE, NAND_ADDR_CYCL_ONE,
+	 ARASAN_PROG_SET_FTRS_MASK},
+	{NAND_CMD_NONE, NAND_CMD_NONE, NAND_ADDR_CYCL_NONE, 0},
+};
+
+struct arasan_ecc_matrix {
+	u32 pagesize;
+	u32 ecc_codeword_size;
+	u8 eccbits;
+	u8 bch;
+	u8 bchval;
+	u16 eccaddr;
+	u16 eccsize;
+};
+
+static const struct arasan_ecc_matrix ecc_matrix[] = {
+	{512, 512, 1, 0, 0, 0x20D, 0x3},
+	{512, 512, 4, 1, 3, 0x209, 0x7},
+	{512, 512, 8, 1, 2, 0x203, 0xD},
+	/*
+	 * 2K byte page
+	 */
+	{2048, 512, 1, 0, 0, 0x834, 0xC},
+	{2048, 512, 4, 1, 3, 0x826, 0x1A},
+	{2048, 512, 8, 1, 2, 0x80c, 0x34},
+	{2048, 512, 12, 1, 1, 0x822, 0x4E},
+	{2048, 512, 16, 1, 0, 0x808, 0x68},
+	{2048, 1024, 24, 1, 4, 0x81c, 0x54},
+	/*
+	 * 4K byte page
+	 */
+	{4096, 512, 1, 0, 0, 0x1068, 0x18},
+	{4096, 512, 4, 1, 3, 0x104c, 0x34},
+	{4096, 512, 8, 1, 2, 0x1018, 0x68},
+	{4096, 512, 12, 1, 1, 0x1044, 0x9C},
+	{4096, 512, 16, 1, 0, 0x1010, 0xD0},
+	{4096, 1024, 24, 1, 4, 0x1038, 0xA8},
+	/*
+	 * 8K byte page
+	 */
+	{8192, 512, 1, 0, 0, 0x20d0, 0x30},
+	{8192, 512, 4, 1, 3, 0x2098, 0x68},
+	{8192, 512, 8, 1, 2, 0x2030, 0xD0},
+	{8192, 512, 12, 1, 1, 0x2088, 0x138},
+	{8192, 512, 16, 1, 0, 0x2020, 0x1A0},
+	{8192, 1024, 24, 1, 4, 0x2070, 0x150},
+	/*
+	 * 16K byte page
+	 */
+	{16384, 512, 1, 0, 0, 0x4460, 0x60},
+	{16384, 512, 4, 1, 3, 0x43f0, 0xD0},
+	{16384, 512, 8, 1, 2, 0x4320, 0x1A0},
+	{16384, 512, 12, 1, 1, 0x4250, 0x270},
+	{16384, 512, 16, 1, 0, 0x4180, 0x340},
+	{16384, 1024, 24, 1, 4, 0x4220, 0x2A0}
+};
+
+static struct nand_ecclayout ondie_nand_oob_64 = {
+	.eccbytes = 32,
+
+	.eccpos = {
+		8, 9, 10, 11, 12, 13, 14, 15,
+		24, 25, 26, 27, 28, 29, 30, 31,
+		40, 41, 42, 43, 44, 45, 46, 47,
+		56, 57, 58, 59, 60, 61, 62, 63
+	},
+
+	.oobfree = {
+		{ .offset = 4, .length = 4 },
+		{ .offset = 20, .length = 4 },
+		{ .offset = 36, .length = 4 },
+		{ .offset = 52, .length = 4 }
+	}
+};
+
+/*
+ * bbt decriptors for chips with on-die ECC and
+ * chips with 64-byte OOB
+ */
+static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
+static u8 mirror_pattern[] = {'1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+	.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
+		NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+	.offs = 4,
+	.len = 4,
+	.veroffs = 20,
+	.maxblocks = 4,
+	.pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+	.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
+		NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+	.offs = 4,
+	.len = 4,
+	.veroffs = 20,
+	.maxblocks = 4,
+	.pattern = mirror_pattern
+};
+
+static u8 buf_data[READ_BUFF_SIZE];
+static u32 buf_index;
+
+static struct nand_ecclayout nand_oob;
+
+static void arasan_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+	struct nand_chip *nand_chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(nand_chip);
+	u32 reg_val;
+
+	reg_val = readl(&info->reg->memadr_reg2);
+	if (chip == 0) {
+		reg_val &= ~ARASAN_NAND_MEM_ADDR2_CS0_MASK;
+		writel(reg_val, &info->reg->memadr_reg2);
+	} else if (chip == 1) {
+		reg_val |= ARASAN_NAND_MEM_ADDR2_CS1_MASK;
+		writel(reg_val, &info->reg->memadr_reg2);
+	}
+}
+
+static void arasan_nand_enable_ecc(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val;
+
+	reg_val = readl(&info->reg->cmd_reg);
+	reg_val |= ARASAN_NAND_CMD_ECC_ON_MASK;
+
+	writel(reg_val, &info->reg->cmd_reg);
+}
+
+static u8 arasan_nand_get_addrcycle(struct mtd_info *mtd)
+{
+	u8 addrcycles;
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	switch (curr_cmd->addr_cycles) {
+	case NAND_ADDR_CYCL_NONE:
+		addrcycles = 0;
+		break;
+	case NAND_ADDR_CYCL_ONE:
+		addrcycles = 1;
+		break;
+	case NAND_ADDR_CYCL_ROW:
+		addrcycles = chip->onfi_params.addr_cycles &
+			     ARASAN_NAND_ROW_ADDR_CYCL_MASK;
+		break;
+	case NAND_ADDR_CYCL_COL:
+		addrcycles = (chip->onfi_params.addr_cycles &
+			      ARASAN_NAND_COL_ADDR_CYCL_MASK) >>
+			      ARASAN_NAND_COL_ADDR_CYCL_SHIFT;
+		break;
+	case NAND_ADDR_CYCL_BOTH:
+		addrcycles = chip->onfi_params.addr_cycles &
+			     ARASAN_NAND_ROW_ADDR_CYCL_MASK;
+		addrcycles += (chip->onfi_params.addr_cycles &
+			       ARASAN_NAND_COL_ADDR_CYCL_MASK) >>
+			       ARASAN_NAND_COL_ADDR_CYCL_SHIFT;
+		break;
+	default:
+		addrcycles = ARASAN_NAND_INVALID_ADDR_CYCL;
+		break;
+	}
+	return addrcycles;
+}
+
+static int arasan_nand_read_page(struct mtd_info *mtd, u8 *buf, u32 size)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	struct nand_config *nand = &info->config;
+	u32 reg_val, i, pktsize, pktnum;
+	u32 *bufptr = (u32 *)buf;
+	u32 timeout;
+	u32  rdcount = 0;
+	u8 addr_cycles;
+
+	if (chip->ecc_step_ds >= ARASAN_NAND_PKTSIZE_1K)
+		pktsize = ARASAN_NAND_PKTSIZE_1K;
+	else
+		pktsize = ARASAN_NAND_PKTSIZE_512;
+
+	if (size % pktsize)
+		pktnum = size/pktsize + 1;
+	else
+		pktnum = size/pktsize;
+
+	reg_val = readl(&info->reg->intsts_enr);
+	reg_val |= ARASAN_NAND_INT_STS_ERR_EN_MASK |
+		   ARASAN_NAND_INT_STS_MUL_BIT_ERR_MASK;
+	writel(reg_val, &info->reg->intsts_enr);
+
+	reg_val = readl(&info->reg->pkt_reg);
+	reg_val &= ~(ARASAN_NAND_PKT_REG_PKT_CNT_MASK |
+		     ARASAN_NAND_PKT_REG_PKT_SIZE_MASK);
+	reg_val |= (pktnum << ARASAN_NAND_PKT_REG_PKT_CNT_SHFT) |
+		    pktsize;
+	writel(reg_val, &info->reg->pkt_reg);
+
+	if (!nand->on_die_ecc_enabled) {
+		arasan_nand_enable_ecc(mtd);
+		addr_cycles = arasan_nand_get_addrcycle(mtd);
+		if (addr_cycles == ARASAN_NAND_INVALID_ADDR_CYCL)
+			return ERR_ADDR_CYCLE;
+
+		writel((NAND_CMD_RNDOUTSTART << ARASAN_NAND_CMD_CMD2_SHIFT) |
+		       NAND_CMD_RNDOUT | (addr_cycles <<
+		       ARASAN_NAND_CMD_ADDR_CYCL_SHIFT),
+		       &info->reg->ecc_sprcmd_reg);
+	}
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (rdcount < pktnum) {
+		timeout = ARASAN_NAND_POLL_TIMEOUT;
+		while (!(readl(&info->reg->intsts_reg) &
+			ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK) && timeout) {
+			udelay(1);
+			timeout--;
+		}
+		if (!timeout) {
+			puts("arasan_read_page: timedout:Buff RDY\n");
+			return -ETIMEDOUT;
+		}
+
+		rdcount++;
+
+		if (pktnum == rdcount) {
+			reg_val = readl(&info->reg->intsts_enr);
+			reg_val |= ARASAN_NAND_INT_STS_XFR_CMPLT_MASK;
+			writel(reg_val, &info->reg->intsts_enr);
+		} else {
+			reg_val = readl(&info->reg->intsts_enr);
+			writel(reg_val | ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+			       &info->reg->intsts_enr);
+		}
+		reg_val = readl(&info->reg->intsts_reg);
+		writel(reg_val | ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+		       &info->reg->intsts_reg);
+
+		for (i = 0; i < pktsize/4; i++)
+			bufptr[i] = readl(&info->reg->buf_dataport);
+
+
+		bufptr += pktsize/4;
+
+		if (rdcount >= pktnum)
+			break;
+
+		writel(ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+		       &info->reg->intsts_enr);
+	}
+
+	timeout = ARASAN_NAND_POLL_TIMEOUT;
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+	if (!timeout) {
+		puts("arasan rd_page timedout:Xfer CMPLT\n");
+		return -ETIMEDOUT;
+	}
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+
+	if (!nand->on_die_ecc_enabled) {
+		if (readl(&info->reg->intsts_reg) &
+		    ARASAN_NAND_INT_STS_MUL_BIT_ERR_MASK) {
+			printf("arasan rd_page:sbiterror\n");
+			return -1;
+		}
+
+		if (readl(&info->reg->intsts_reg) &
+		    ARASAN_NAND_INT_STS_ERR_EN_MASK) {
+			mtd->ecc_stats.failed++;
+			printf("arasan rd_page:multibiterror\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static int arasan_nand_read_page_hwecc(struct mtd_info *mtd,
+		struct nand_chip *chip, u8 *buf, int oob_required, int page)
+{
+	int status;
+
+	status = arasan_nand_read_page(mtd, buf, (mtd->writesize));
+
+	if (oob_required)
+		chip->ecc.read_oob(mtd, chip, page);
+
+	return status;
+}
+
+static void arasan_nand_fill_tx(struct mtd_info *mtd, const u8 *buf, int len)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 __iomem *nand = &info->reg->buf_dataport;
+
+	if (((unsigned long)buf & 0x3) != 0) {
+		if (((unsigned long)buf & 0x1) != 0) {
+			if (len) {
+				writeb(*buf, nand);
+				buf += 1;
+				len--;
+			}
+		}
+
+		if (((unsigned long)buf & 0x3) != 0) {
+			if (len >= 2) {
+				writew(*(u16 *)buf, nand);
+				buf += 2;
+				len -= 2;
+			}
+		}
+	}
+
+	while (len >= 4) {
+		writel(*(u32 *)buf, nand);
+		buf += 4;
+		len -= 4;
+	}
+
+	if (len) {
+		if (len >= 2) {
+			writew(*(u16 *)buf, nand);
+			buf += 2;
+			len -= 2;
+		}
+
+		if (len)
+			writeb(*buf, nand);
+	}
+}
+
+static int arasan_nand_write_page_hwecc(struct mtd_info *mtd,
+		struct nand_chip *chip, const u8 *buf, int oob_required,
+		int page)
+{
+	struct nand_drv *info = nand_get_controller_data(chip);
+	struct nand_config *nand = &info->config;
+	u32 reg_val, i, pktsize, pktnum;
+	const u32 *bufptr = (const u32 *)buf;
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+	u32 size = mtd->writesize;
+	u32 rdcount = 0;
+	u8 column_addr_cycles;
+
+	if (chip->ecc_step_ds >= ARASAN_NAND_PKTSIZE_1K)
+		pktsize = ARASAN_NAND_PKTSIZE_1K;
+	else
+		pktsize = ARASAN_NAND_PKTSIZE_512;
+
+	if (size % pktsize)
+		pktnum = size/pktsize + 1;
+	else
+		pktnum = size/pktsize;
+
+	reg_val = readl(&info->reg->pkt_reg);
+	reg_val &= ~(ARASAN_NAND_PKT_REG_PKT_CNT_MASK |
+		     ARASAN_NAND_PKT_REG_PKT_SIZE_MASK);
+	reg_val |= (pktnum << ARASAN_NAND_PKT_REG_PKT_CNT_SHFT) | pktsize;
+	writel(reg_val, &info->reg->pkt_reg);
+
+	if (!nand->on_die_ecc_enabled) {
+		arasan_nand_enable_ecc(mtd);
+		column_addr_cycles = (chip->onfi_params.addr_cycles &
+				      ARASAN_NAND_COL_ADDR_CYCL_MASK) >>
+				      ARASAN_NAND_COL_ADDR_CYCL_SHIFT;
+		writel((NAND_CMD_RNDIN | (column_addr_cycles << 28)),
+		       &info->reg->ecc_sprcmd_reg);
+	}
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (rdcount < pktnum) {
+		timeout = ARASAN_NAND_POLL_TIMEOUT;
+		while (!(readl(&info->reg->intsts_reg) &
+			ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK) && timeout) {
+			udelay(1);
+			timeout--;
+		}
+
+		if (!timeout) {
+			puts("arasan_write_page: timedout:Buff RDY\n");
+			return -ETIMEDOUT;
+		}
+
+		rdcount++;
+
+		if (pktnum == rdcount) {
+			reg_val = readl(&info->reg->intsts_enr);
+			reg_val |= ARASAN_NAND_INT_STS_XFR_CMPLT_MASK;
+			writel(reg_val, &info->reg->intsts_enr);
+		} else {
+			reg_val = readl(&info->reg->intsts_enr);
+			writel(reg_val | ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+			       &info->reg->intsts_enr);
+		}
+
+		reg_val = readl(&info->reg->intsts_reg);
+		writel(reg_val | ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+		       &info->reg->intsts_reg);
+
+		for (i = 0; i < pktsize/4; i++)
+			writel(bufptr[i], &info->reg->buf_dataport);
+
+		bufptr += pktsize/4;
+
+		if (rdcount >= pktnum)
+			break;
+
+		writel(ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+		       &info->reg->intsts_enr);
+	}
+
+	timeout = ARASAN_NAND_POLL_TIMEOUT;
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+	if (!timeout) {
+		puts("arasan write_page timedout:Xfer CMPLT\n");
+		return -ETIMEDOUT;
+	}
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+
+	if (oob_required)
+		chip->ecc.write_oob(mtd, chip, nand->page);
+
+	return 0;
+}
+
+static int arasan_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
+				int page)
+{
+	chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+	chip->read_buf(mtd, chip->oob_poi, (mtd->oobsize));
+
+	return 0;
+}
+
+static int arasan_nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
+				 int page)
+{
+	int status = 0;
+	const u8 *buf = chip->oob_poi;
+
+	chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
+	chip->write_buf(mtd, buf, mtd->oobsize);
+
+	return status;
+}
+
+static int arasan_nand_reset(struct mtd_info *mtd,
+			     struct arasan_nand_command_format *curr_cmd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+	u32 cmd_reg = 0;
+
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	cmd_reg = readl(&info->reg->cmd_reg);
+	cmd_reg &= ~ARASAN_NAND_CMD_CMD12_MASK;
+
+	cmd_reg |= curr_cmd->cmd1 |
+		  (curr_cmd->cmd2 << ARASAN_NAND_CMD_CMD2_SHIFT);
+	writel(cmd_reg, &info->reg->cmd_reg);
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+	if (!timeout) {
+		printf("ERROR:%s timedout\n", __func__);
+		return -ETIMEDOUT;
+	}
+
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+
+	return 0;
+}
+
+static u8 arasan_nand_page(struct mtd_info *mtd)
+{
+	u8 page_val = 0;
+
+	switch (mtd->writesize) {
+	case 512:
+		page_val = 0;
+		break;
+	case 2048:
+		page_val = 1;
+		break;
+	case 4096:
+		page_val = 2;
+		break;
+	case 8192:
+		page_val = 3;
+		break;
+	case 16384:
+		page_val = 4;
+		break;
+	case 1024:
+		page_val = 5;
+		break;
+	default:
+		printf("%s:Pagesize>16K\n", __func__);
+		break;
+	}
+
+	return page_val;
+}
+
+static int arasan_nand_send_wrcmd(struct arasan_nand_command_format *curr_cmd,
+			int column, int page_addr, struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val, page;
+	u8 page_val, addr_cycles;
+
+	writel(ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->cmd_reg);
+	reg_val &= ~ARASAN_NAND_CMD_CMD12_MASK;
+	reg_val |= curr_cmd->cmd1 |
+		   (curr_cmd->cmd2 << ARASAN_NAND_CMD_CMD2_SHIFT);
+	if (curr_cmd->cmd1 == NAND_CMD_SEQIN) {
+		reg_val &= ~ARASAN_NAND_CMD_PG_SIZE_MASK;
+		page_val = arasan_nand_page(mtd);
+		reg_val |= (page_val << ARASAN_NAND_CMD_PG_SIZE_SHIFT);
+	}
+
+	reg_val &= ~ARASAN_NAND_CMD_ADDR_CYCL_MASK;
+	addr_cycles = arasan_nand_get_addrcycle(mtd);
+
+	if (addr_cycles == ARASAN_NAND_INVALID_ADDR_CYCL)
+		return ERR_ADDR_CYCLE;
+
+	reg_val |= (addr_cycles <<
+		   ARASAN_NAND_CMD_ADDR_CYCL_SHIFT);
+	writel(reg_val, &info->reg->cmd_reg);
+
+	if (page_addr == -1)
+		page_addr = 0;
+
+	page = (page_addr << ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT) &
+		ARASAN_NAND_MEM_ADDR1_PAGE_MASK;
+	column &= ARASAN_NAND_MEM_ADDR1_COL_MASK;
+	writel(page | column, &info->reg->memadr_reg1);
+
+	reg_val = readl(&info->reg->memadr_reg2);
+	reg_val &= ~ARASAN_NAND_MEM_ADDR2_PAGE_MASK;
+	reg_val |= (page_addr >> ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT);
+	writel(reg_val, &info->reg->memadr_reg2);
+
+	return 0;
+}
+
+static void arasan_nand_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val;
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+
+	reg_val = readl(&info->reg->pkt_reg);
+	reg_val &= ~(ARASAN_NAND_PKT_REG_PKT_CNT_MASK |
+		     ARASAN_NAND_PKT_REG_PKT_SIZE_MASK);
+
+	reg_val |= (1 << ARASAN_NAND_PKT_REG_PKT_CNT_SHFT) | len;
+	writel(reg_val, &info->reg->pkt_reg);
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+
+	if (!timeout)
+		puts("ERROR:arasan_nand_write_buf timedout:Buff RDY\n");
+
+	reg_val = readl(&info->reg->intsts_enr);
+	reg_val |= ARASAN_NAND_INT_STS_XFR_CMPLT_MASK;
+	writel(reg_val, &info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_BUF_WR_RDY_MASK,
+	       &info->reg->intsts_reg);
+
+	arasan_nand_fill_tx(mtd, buf, len);
+
+	timeout = ARASAN_NAND_POLL_TIMEOUT;
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+	if (!timeout)
+		puts("ERROR:arasan_nand_write_buf timedout:Xfer CMPLT\n");
+
+	writel(readl(&info->reg->intsts_enr) |
+	       ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	writel(readl(&info->reg->intsts_reg) |
+	       ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+}
+
+static int arasan_nand_erase(struct arasan_nand_command_format *curr_cmd,
+			      int column, int page_addr, struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val, page;
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+	u8 row_addr_cycles;
+
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->cmd_reg);
+	reg_val &= ~ARASAN_NAND_CMD_CMD12_MASK;
+	reg_val |= curr_cmd->cmd1 |
+		   (curr_cmd->cmd2 << ARASAN_NAND_CMD_CMD2_SHIFT);
+	row_addr_cycles = arasan_nand_get_addrcycle(mtd);
+
+	if (row_addr_cycles == ARASAN_NAND_INVALID_ADDR_CYCL)
+		return ERR_ADDR_CYCLE;
+
+	reg_val &= ~ARASAN_NAND_CMD_ADDR_CYCL_MASK;
+	reg_val |= (row_addr_cycles <<
+		    ARASAN_NAND_CMD_ADDR_CYCL_SHIFT);
+
+	writel(reg_val, &info->reg->cmd_reg);
+
+	page = (page_addr >> ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT) &
+		ARASAN_NAND_MEM_ADDR1_COL_MASK;
+	column = page_addr & ARASAN_NAND_MEM_ADDR1_COL_MASK;
+	writel(column | (page << ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT),
+	       &info->reg->memadr_reg1);
+
+	reg_val = readl(&info->reg->memadr_reg2);
+	reg_val &= ~ARASAN_NAND_MEM_ADDR2_PAGE_MASK;
+	reg_val |= (page_addr >> ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT);
+	writel(reg_val, &info->reg->memadr_reg2);
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+	if (!timeout) {
+		printf("ERROR:%s timedout:Xfer CMPLT\n", __func__);
+		return -ETIMEDOUT;
+	}
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+
+	return 0;
+}
+
+static int arasan_nand_read_status(struct arasan_nand_command_format *curr_cmd,
+				int column, int page_addr, struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val;
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+	u8 addr_cycles;
+
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->cmd_reg);
+	reg_val &= ~ARASAN_NAND_CMD_CMD12_MASK;
+	reg_val |= curr_cmd->cmd1 |
+		   (curr_cmd->cmd2 << ARASAN_NAND_CMD_CMD2_SHIFT);
+	addr_cycles = arasan_nand_get_addrcycle(mtd);
+
+	if (addr_cycles == ARASAN_NAND_INVALID_ADDR_CYCL)
+		return ERR_ADDR_CYCLE;
+
+	reg_val &= ~ARASAN_NAND_CMD_ADDR_CYCL_MASK;
+	reg_val |= (addr_cycles <<
+		    ARASAN_NAND_CMD_ADDR_CYCL_SHIFT);
+
+	writel(reg_val, &info->reg->cmd_reg);
+
+	reg_val = readl(&info->reg->pkt_reg);
+	reg_val &= ~(ARASAN_NAND_PKT_REG_PKT_CNT_MASK |
+		     ARASAN_NAND_PKT_REG_PKT_SIZE_MASK);
+	reg_val |= (1 << ARASAN_NAND_PKT_REG_PKT_CNT_SHFT) | 1;
+	writel(reg_val, &info->reg->pkt_reg);
+
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+
+	if (!timeout) {
+		printf("ERROR:%s: timedout:Xfer CMPLT\n", __func__);
+		return -ETIMEDOUT;
+	}
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+
+	return 0;
+}
+
+static int arasan_nand_send_rdcmd(struct arasan_nand_command_format *curr_cmd,
+			       int column, int page_addr, struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val, addr_cycles, page;
+	u8 page_val;
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+	       &info->reg->intsts_enr);
+
+	reg_val = readl(&info->reg->cmd_reg);
+	reg_val &= ~ARASAN_NAND_CMD_CMD12_MASK;
+	reg_val |= curr_cmd->cmd1 |
+		   (curr_cmd->cmd2 << ARASAN_NAND_CMD_CMD2_SHIFT);
+
+	if (curr_cmd->cmd1 == NAND_CMD_RNDOUT ||
+	    curr_cmd->cmd1 == NAND_CMD_READ0) {
+		reg_val &= ~ARASAN_NAND_CMD_PG_SIZE_MASK;
+		page_val = arasan_nand_page(mtd);
+		reg_val |= (page_val << ARASAN_NAND_CMD_PG_SIZE_SHIFT);
+	}
+
+	reg_val &= ~ARASAN_NAND_CMD_ECC_ON_MASK;
+
+	reg_val &= ~ARASAN_NAND_CMD_ADDR_CYCL_MASK;
+
+	addr_cycles = arasan_nand_get_addrcycle(mtd);
+
+	if (addr_cycles == ARASAN_NAND_INVALID_ADDR_CYCL)
+		return ERR_ADDR_CYCLE;
+
+	reg_val |= (addr_cycles << 28);
+	writel(reg_val, &info->reg->cmd_reg);
+
+	if (page_addr == -1)
+		page_addr = 0;
+
+	page = (page_addr << ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT) &
+		ARASAN_NAND_MEM_ADDR1_PAGE_MASK;
+	column &= ARASAN_NAND_MEM_ADDR1_COL_MASK;
+	writel(page | column, &info->reg->memadr_reg1);
+
+	reg_val = readl(&info->reg->memadr_reg2);
+	reg_val &= ~ARASAN_NAND_MEM_ADDR2_PAGE_MASK;
+	reg_val |= (page_addr >> ARASAN_NAND_MEM_ADDR1_PAGE_SHIFT);
+	writel(reg_val, &info->reg->memadr_reg2);
+
+	buf_index = 0;
+
+	return 0;
+}
+
+static void arasan_nand_read_buf(struct mtd_info *mtd, u8 *buf, int size)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 reg_val, i;
+	u32 *bufptr = (u32 *)buf;
+	u32 timeout = ARASAN_NAND_POLL_TIMEOUT;
+
+	reg_val = readl(&info->reg->pkt_reg);
+	reg_val &= ~(ARASAN_NAND_PKT_REG_PKT_CNT_MASK |
+		     ARASAN_NAND_PKT_REG_PKT_SIZE_MASK);
+	reg_val |= (1 << ARASAN_NAND_PKT_REG_PKT_CNT_SHFT) | size;
+	writel(reg_val, &info->reg->pkt_reg);
+
+	writel(curr_cmd->pgm, &info->reg->pgm_reg);
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+
+	if (!timeout)
+		puts("ERROR:arasan_nand_read_buf timedout:Buff RDY\n");
+
+	reg_val = readl(&info->reg->intsts_enr);
+	reg_val |= ARASAN_NAND_INT_STS_XFR_CMPLT_MASK;
+	writel(reg_val, &info->reg->intsts_enr);
+
+	writel(reg_val | ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_BUF_RD_RDY_MASK,
+	       &info->reg->intsts_reg);
+
+	buf_index = 0;
+	for (i = 0; i < size / 4; i++)
+		bufptr[i] = readl(&info->reg->buf_dataport);
+
+	if (size & 0x03)
+		bufptr[i] = readl(&info->reg->buf_dataport);
+
+	timeout = ARASAN_NAND_POLL_TIMEOUT;
+
+	while (!(readl(&info->reg->intsts_reg) &
+		ARASAN_NAND_INT_STS_XFR_CMPLT_MASK) && timeout) {
+		udelay(1);
+		timeout--;
+	}
+
+	if (!timeout)
+		puts("ERROR:arasan_nand_read_buf timedout:Xfer CMPLT\n");
+
+	reg_val = readl(&info->reg->intsts_enr);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+	reg_val = readl(&info->reg->intsts_reg);
+	writel(reg_val | ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_reg);
+}
+
+static u8 arasan_nand_read_byte(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	u32 size;
+	u8 val;
+	struct nand_onfi_params *p;
+
+	if (buf_index == 0) {
+		p = &chip->onfi_params;
+		if (curr_cmd->cmd1 == NAND_CMD_READID)
+			size = 4;
+		else if (curr_cmd->cmd1 == NAND_CMD_PARAM)
+			size = sizeof(struct nand_onfi_params);
+		else if (curr_cmd->cmd1 == NAND_CMD_RNDOUT)
+			size = le16_to_cpu(p->ext_param_page_length) * 16;
+		else if (curr_cmd->cmd1 == NAND_CMD_GET_FEATURES)
+			size = 4;
+		else if (curr_cmd->cmd1 == NAND_CMD_STATUS)
+			return readb(&info->reg->flash_sts_reg);
+		else
+			size = 8;
+		chip->read_buf(mtd, &buf_data[0], size);
+	}
+
+	val = *(&buf_data[0] + buf_index);
+	buf_index++;
+
+	return val;
+}
+
+static void arasan_nand_cmd_function(struct mtd_info *mtd, unsigned int command,
+				     int column, int page_addr)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(chip);
+	struct nand_config *nand = &info->config;
+	u32 i, ret = 0;
+
+	curr_cmd = NULL;
+	writel(ARASAN_NAND_INT_STS_XFR_CMPLT_MASK,
+	       &info->reg->intsts_enr);
+
+	if ((command == NAND_CMD_READOOB) &&
+	    (mtd->writesize > 512)) {
+		column += mtd->writesize;
+		command = NAND_CMD_READ0;
+	}
+
+	/* Get the command format */
+	for (i = 0; (arasan_nand_commands[i].cmd1 != NAND_CMD_NONE ||
+		     arasan_nand_commands[i].cmd2 != NAND_CMD_NONE); i++) {
+		if (command == arasan_nand_commands[i].cmd1) {
+			curr_cmd = &arasan_nand_commands[i];
+			break;
+		}
+	}
+
+	if (curr_cmd == NULL) {
+		printf("Unsupported Command; 0x%x\n", command);
+		return;
+	}
+
+	if (curr_cmd->cmd1 == NAND_CMD_RESET)
+		ret = arasan_nand_reset(mtd, curr_cmd);
+
+	if ((curr_cmd->cmd1 == NAND_CMD_READID) ||
+	    (curr_cmd->cmd1 == NAND_CMD_PARAM) ||
+	    (curr_cmd->cmd1 == NAND_CMD_RNDOUT) ||
+	    (curr_cmd->cmd1 == NAND_CMD_GET_FEATURES) ||
+	    (curr_cmd->cmd1 == NAND_CMD_READ0))
+		ret = arasan_nand_send_rdcmd(curr_cmd, column, page_addr, mtd);
+
+	if ((curr_cmd->cmd1 == NAND_CMD_SET_FEATURES) ||
+	    (curr_cmd->cmd1 == NAND_CMD_SEQIN)) {
+		nand->page = page_addr;
+		ret = arasan_nand_send_wrcmd(curr_cmd, column, page_addr, mtd);
+	}
+
+	if (curr_cmd->cmd1 == NAND_CMD_ERASE1)
+		ret = arasan_nand_erase(curr_cmd, column, page_addr, mtd);
+
+	if (curr_cmd->cmd1 == NAND_CMD_STATUS)
+		ret = arasan_nand_read_status(curr_cmd, column, page_addr, mtd);
+
+	if (ret != 0)
+		printf("ERROR:%s:command:0x%x\n", __func__, curr_cmd->cmd1);
+}
+
+static void arasan_check_ondie(struct mtd_info *mtd)
+{
+	struct nand_chip *nand_chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(nand_chip);
+	struct nand_config *nand = &info->config;
+	u8 maf_id, dev_id;
+	u8 get_feature[4];
+	u8 set_feature[4] = {ENABLE_ONDIE_ECC, 0x00, 0x00, 0x00};
+	u32 i;
+
+	nand_chip->select_chip(mtd, 0);
+
+	/* Send the command for reading device ID */
+	nand_chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+	nand_chip->cmdfunc(mtd, NAND_CMD_READID, 0, -1);
+
+	/* Read manufacturer and device IDs */
+	maf_id = nand_chip->read_byte(mtd);
+	dev_id = nand_chip->read_byte(mtd);
+
+	if ((maf_id == NAND_MFR_MICRON) &&
+	    ((dev_id == 0xf1) || (dev_id == 0xa1) || (dev_id == 0xb1) ||
+	     (dev_id == 0xaa) || (dev_id == 0xba) || (dev_id == 0xda) ||
+	     (dev_id == 0xca) || (dev_id == 0xac) || (dev_id == 0xbc) ||
+	     (dev_id == 0xdc) || (dev_id == 0xcc) || (dev_id == 0xa3) ||
+	     (dev_id == 0xb3) || (dev_id == 0xd3) || (dev_id == 0xc3))) {
+		nand_chip->cmdfunc(mtd, NAND_CMD_SET_FEATURES,
+				   ONDIE_ECC_FEATURE_ADDR, -1);
+
+		nand_chip->write_buf(mtd, &set_feature[0], 4);
+		nand_chip->cmdfunc(mtd, NAND_CMD_GET_FEATURES,
+				   ONDIE_ECC_FEATURE_ADDR, -1);
+
+		for (i = 0; i < 4; i++)
+			get_feature[i] = nand_chip->read_byte(mtd);
+
+		if (get_feature[0] & ENABLE_ONDIE_ECC) {
+			nand->on_die_ecc_enabled = true;
+			printf("On-DIE ECC Enabled\n");
+		} else {
+			printf("%s: Unable to enable OnDie ECC\n", __func__);
+		}
+
+		/* Use the BBT pattern descriptors */
+		nand_chip->bbt_td = &bbt_main_descr;
+		nand_chip->bbt_md = &bbt_mirror_descr;
+	}
+}
+
+static int arasan_nand_ecc_init(struct mtd_info *mtd)
+{
+	struct nand_chip *nand_chip = mtd_to_nand(mtd);
+	struct nand_drv *info = nand_get_controller_data(nand_chip);
+	int found = -1;
+	u32 regval, eccpos_start, i, eccaddr;
+
+	for (i = 0; i < ARRAY_SIZE(ecc_matrix); i++) {
+		if ((ecc_matrix[i].pagesize == mtd->writesize) &&
+		    (ecc_matrix[i].ecc_codeword_size >=
+		     nand_chip->ecc_step_ds)) {
+			if (ecc_matrix[i].eccbits >=
+			    nand_chip->ecc_strength_ds) {
+				found = i;
+				break;
+			}
+			found = i;
+		}
+	}
+
+	if (found < 0)
+		return 1;
+
+	eccaddr = mtd->writesize + mtd->oobsize -
+		  ecc_matrix[found].eccsize;
+
+	regval = eccaddr |
+		 (ecc_matrix[found].eccsize << ARASAN_NAND_ECC_SIZE_SHIFT) |
+		 (ecc_matrix[found].bch << ARASAN_NAND_ECC_BCH_SHIFT);
+	writel(regval, &info->reg->ecc_reg);
+
+	if (ecc_matrix[found].bch) {
+		regval = readl(&info->reg->memadr_reg2);
+		regval &= ~ARASAN_NAND_MEM_ADDR2_BCH_MASK;
+		regval |= (ecc_matrix[found].bchval <<
+			   ARASAN_NAND_MEM_ADDR2_BCH_SHIFT);
+		writel(regval, &info->reg->memadr_reg2);
+	}
+
+	nand_oob.eccbytes = ecc_matrix[found].eccsize;
+	eccpos_start = mtd->oobsize - nand_oob.eccbytes;
+
+	for (i = 0; i < nand_oob.eccbytes; i++)
+		nand_oob.eccpos[i] = eccpos_start + i;
+
+	nand_oob.oobfree[0].offset = 2;
+	nand_oob.oobfree[0].length = eccpos_start - 2;
+
+	nand_chip->ecc.size = ecc_matrix[found].ecc_codeword_size;
+	nand_chip->ecc.strength = ecc_matrix[found].eccbits;
+	nand_chip->ecc.bytes = ecc_matrix[found].eccsize;
+	nand_chip->ecc.layout = &nand_oob;
+
+	return 0;
+}
+
+static int arasan_probe(struct udevice *dev)
+{
+	struct arasan_nand_info *arasan = dev_get_priv(dev);
+	struct nand_chip *nand_chip = &arasan->nand_chip;
+	struct nand_drv *info = &arasan->nand_ctrl;
+	struct nand_config *nand = &info->config;
+	struct mtd_info *mtd;
+	int err = -1;
+
+	info->reg = (struct nand_regs *)dev_read_addr(dev);
+	mtd = nand_to_mtd(nand_chip);
+	nand_set_controller_data(nand_chip, &arasan->nand_ctrl);
+
+#ifdef CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
+	nand_chip->options |= NAND_NO_SUBPAGE_WRITE;
+#endif
+
+	/* Set the driver entry points for MTD */
+	nand_chip->cmdfunc = arasan_nand_cmd_function;
+	nand_chip->select_chip = arasan_nand_select_chip;
+	nand_chip->read_byte = arasan_nand_read_byte;
+
+	/* Buffer read/write routines */
+	nand_chip->read_buf = arasan_nand_read_buf;
+	nand_chip->write_buf = arasan_nand_write_buf;
+	nand_chip->bbt_options = NAND_BBT_USE_FLASH;
+
+	writel(0x0, &info->reg->cmd_reg);
+	writel(0x0, &info->reg->pgm_reg);
+
+	/* first scan to find the device and get the page size */
+	if (nand_scan_ident(mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL)) {
+		printf("%s: nand_scan_ident failed\n", __func__);
+		goto fail;
+	}
+
+	nand_chip->ecc.mode = NAND_ECC_HW;
+	nand_chip->ecc.hwctl = NULL;
+	nand_chip->ecc.read_page = arasan_nand_read_page_hwecc;
+	nand_chip->ecc.write_page = arasan_nand_write_page_hwecc;
+	nand_chip->ecc.read_oob = arasan_nand_read_oob;
+	nand_chip->ecc.write_oob = arasan_nand_write_oob;
+
+	arasan_check_ondie(mtd);
+
+	/*
+	 * If on die supported, then give priority to on-die ecc and use
+	 * it instead of controller ecc.
+	 */
+	if (nand->on_die_ecc_enabled) {
+		nand_chip->ecc.strength = 1;
+		nand_chip->ecc.size = mtd->writesize;
+		nand_chip->ecc.bytes = 0;
+		nand_chip->ecc.layout = &ondie_nand_oob_64;
+	} else {
+		if (arasan_nand_ecc_init(mtd)) {
+			printf("%s: nand_ecc_init failed\n", __func__);
+			goto fail;
+		}
+	}
+
+	if (nand_scan_tail(mtd)) {
+		printf("%s: nand_scan_tail failed\n", __func__);
+		goto fail;
+	}
+
+	if (nand_register(0, mtd)) {
+		printf("Nand Register Fail\n");
+		goto fail;
+	}
+
+	return 0;
+fail:
+	free(nand);
+	return err;
+}
+
+static const struct udevice_id arasan_nand_dt_ids[] = {
+	{.compatible = "arasan,nfc-v3p10",},
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(arasan_nand) = {
+	.name = "arasan_nand",
+	.id = UCLASS_MTD,
+	.of_match = arasan_nand_dt_ids,
+	.probe = arasan_probe,
+	.priv_auto	= sizeof(struct arasan_nand_info),
+};
+
+void board_nand_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_MTD,
+					  DM_DRIVER_GET(arasan_nand), &dev);
+	if (ret && ret != -ENODEV)
+		pr_err("Failed to initialize %s. (error %d)\n", dev->name, ret);
+}