mtd: rawnand: cortina_nand: Add Cortina CAxxxx SoC support

Add Cortina Access parallel Nand support for CAxxxx SOCs

Signed-off-by: Kate Liu <kate.liu@cortina-access.com>
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
CC: Tom Rini <trini@konsulko.com>
CC: Scott Wood <oss@buserror.net>
Reviewed-by: Tom Rini <trini@konsulko.com>

4 files changed, 1696 insertions, 0 deletions

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 3cf3b14f05b..ed151ee0a5c 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -321,6 +321,18 @@ config NAND_STM32_FMC2
 	  The controller supports a maximum 8k page size and supports
 	  a maximum 8-bit correction error per sector of 512 bytes.
 
+config CORTINA_NAND
+	bool "Support for NAND controller on Cortina-Access SoCs"
+	depends on CORTINA_PLATFORM
+	select SYS_NAND_SELF_INIT
+	select DM_MTD
+	imply CMD_NAND
+	help
+	  Enables support for NAND Flash chips on Coartina-Access SoCs platform
+	  This controller is found on Presidio/Venus SoCs.
+	  The controller supports a maximum 8k page size and supports
+	  a maximum 40-bit error correction per sector of 1024 bytes.
+
 comment "Generic NAND options"
 
 config SYS_NAND_BLOCK_SIZE
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index 24c51b6924a..f3f0e15a157 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_NAND_PLAT) += nand_plat.o
 obj-$(CONFIG_NAND_SUNXI) += sunxi_nand.o
 obj-$(CONFIG_NAND_ZYNQ) += zynq_nand.o
 obj-$(CONFIG_NAND_STM32_FMC2) += stm32_fmc2_nand.o
+obj-$(CONFIG_CORTINA_NAND) += cortina_nand.o
 
 else  # minimal SPL drivers
 
diff --git a/drivers/mtd/nand/raw/cortina_nand.c b/drivers/mtd/nand/raw/cortina_nand.c
new file mode 100644
index 00000000000..12bd1ded83f
--- /dev/null
+++ b/drivers/mtd/nand/raw/cortina_nand.c
@@ -0,0 +1,1390 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2020, Cortina Access Inc..
+ */
+
+#include <common.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/sizes.h>
+#include <log.h>
+#include <asm/io.h>
+#include <memalign.h>
+#include <nand.h>
+#include <dm/device_compat.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include <linux/errno.h>
+#include <asm/gpio.h>
+#include <fdtdec.h>
+#include <bouncebuf.h>
+#include <dm.h>
+#include "cortina_nand.h"
+
+static unsigned int *pread, *pwrite;
+
+static const struct udevice_id cortina_nand_dt_ids[] = {
+	{
+	 .compatible = "cortina,ca-nand",
+	 },
+	{ /* sentinel */ }
+};
+
+static struct nand_ecclayout eccoob;
+
+/* Information about an attached NAND chip */
+struct fdt_nand {
+	int enabled;		/* 1 to enable, 0 to disable */
+	s32 width;		/* bit width, must be 8 */
+	u32 nand_ecc_strength;
+};
+
+struct nand_drv {
+	u32 fifo_index;
+	struct nand_ctlr *reg;
+	struct dma_global *dma_glb;
+	struct dma_ssp *dma_nand;
+	struct tx_descriptor_t *tx_desc;
+	struct rx_descriptor_t *rx_desc;
+	struct fdt_nand config;
+	unsigned int flash_base;
+};
+
+struct ca_nand_info {
+	struct udevice *dev;
+	struct nand_drv nand_ctrl;
+	struct nand_chip nand_chip;
+};
+
+/**
+ * Wait for command completion
+ *
+ * @param reg	nand_ctlr structure
+ * @return
+ *	1 - Command completed
+ *	0 - Timeout
+ */
+static int nand_waitfor_cmd_completion(struct nand_ctlr *reg, unsigned int mask)
+{
+	unsigned int reg_v = 0;
+
+	if (readl_poll_timeout(&reg->flash_flash_access_start, reg_v,
+			       !(reg_v & mask), (FLASH_LONG_DELAY << 2))) {
+		pr_err("Nand CMD timeout!\n");
+		return 0;
+	}
+
+	return 1;
+}
+
+/**
+ * Read one byte from the chip
+ *
+ * @param mtd	MTD device structure
+ * @return	data byte
+ *
+ * Read function for 8bit bus-width
+ */
+static uint8_t read_byte(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info;
+	u8 ret_v;
+
+	info = (struct nand_drv *)nand_get_controller_data(chip);
+
+	clrsetbits_le32(&info->reg->flash_flash_access_start, GENMASK(31, 0),
+			NFLASH_GO | NFLASH_RD);
+
+	if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO))
+		printf("%s: Command timeout\n", __func__);
+
+	ret_v = readl(&info->reg->flash_nf_data) >> (8 * info->fifo_index++);
+	info->fifo_index %= 4;
+
+	return (uint8_t)ret_v;
+}
+
+/**
+ * Read len bytes from the chip into a buffer
+ *
+ * @param mtd	MTD device structure
+ * @param buf	buffer to store data to
+ * @param len	number of bytes to read
+ *
+ * Read function for 8bit bus-width
+ */
+static void read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+	int i;
+	unsigned int reg;
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+
+	for (i = 0; i < len; i++) {
+		clrsetbits_le32(&info->reg->flash_flash_access_start,
+				GENMASK(31, 0), NFLASH_GO | NFLASH_RD);
+
+		if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO))
+			printf("%s: Command timeout\n", __func__);
+
+		reg = readl(&info->reg->flash_nf_data) >>
+		    (8 * info->fifo_index++);
+		memcpy(buf + i, &reg, 1);
+		info->fifo_index %= 4;
+	}
+}
+
+/**
+ * Check READY pin status to see if it is ready or not
+ *
+ * @param mtd	MTD device structure
+ * @return
+ *	1 - ready
+ *	0 - not ready
+ */
+static int nand_dev_ready(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	int reg_val;
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+
+	reg_val = readl(&info->reg->flash_status);
+	if (reg_val & NFLASH_READY)
+		return 1;
+	else
+		return 0;
+}
+
+/* Dummy implementation: we don't support multiple chips */
+static void nand_select_chip(struct mtd_info *mtd, int chipnr)
+{
+	switch (chipnr) {
+	case -1:
+	case 0:
+		break;
+
+	default:
+		WARN_ON(chipnr);
+	}
+}
+
+int init_nand_dma(struct nand_chip *nand)
+{
+	int i;
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(nand);
+
+	setbits_le32(&info->dma_glb->dma_glb_dma_lso_ctrl, TX_DMA_ENABLE);
+	setbits_le32(&info->dma_glb->dma_glb_dma_ssp_rx_ctrl,
+		     TX_DMA_ENABLE | DMA_CHECK_OWNER);
+	setbits_le32(&info->dma_glb->dma_glb_dma_ssp_tx_ctrl,
+		     RX_DMA_ENABLE | DMA_CHECK_OWNER);
+
+	info->tx_desc = malloc_cache_aligned((sizeof(struct tx_descriptor_t) *
+					      CA_DMA_DESC_NUM));
+	info->rx_desc = malloc_cache_aligned((sizeof(struct rx_descriptor_t) *
+					      CA_DMA_DESC_NUM));
+
+	if (!info->rx_desc && info->tx_desc) {
+		printf("Fail to alloc DMA descript!\n");
+		kfree(info->tx_desc);
+		return -ENOMEM;
+	} else if (info->rx_desc && !info->tx_desc) {
+		printf("Fail to alloc DMA descript!\n");
+		kfree(info->tx_desc);
+		return -ENOMEM;
+	}
+
+	/* set RX DMA base address and depth */
+	clrsetbits_le32(&info->dma_nand->dma_q_rxq_base_depth,
+			GENMASK(31, 4), (uintptr_t)info->rx_desc);
+	clrsetbits_le32(&info->dma_nand->dma_q_rxq_base_depth,
+			GENMASK(3, 0), CA_DMA_DEPTH);
+
+	/* set TX DMA base address and depth */
+	clrsetbits_le32(&info->dma_nand->dma_q_txq_base_depth,
+			GENMASK(31, 4), (uintptr_t)info->tx_desc);
+	clrsetbits_le32(&info->dma_nand->dma_q_txq_base_depth,
+			GENMASK(3, 0), CA_DMA_DEPTH);
+
+	memset((unsigned char *)info->tx_desc, 0,
+	       (sizeof(struct tx_descriptor_t) * CA_DMA_DESC_NUM));
+	memset((unsigned char *)info->rx_desc, 0,
+	       (sizeof(struct rx_descriptor_t) * CA_DMA_DESC_NUM));
+
+	for (i = 0; i < CA_DMA_DESC_NUM; i++) {
+		/* set owner bit as SW */
+		info->tx_desc[i].own = 1;
+		/* enable Scatter-Gather memory copy */
+		info->tx_desc[i].sgm = 0x1;
+	}
+
+	return 0;
+}
+
+/**
+ * Send command to NAND device
+ *
+ * @param mtd		MTD device structure
+ * @param command	the command to be sent
+ * @param column	the column address for this command, -1 if none
+ * @param page_addr	the page address for this command, -1 if none
+ */
+static void ca_nand_command(struct mtd_info *mtd, unsigned int command,
+			    int column, int page_addr)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info;
+	unsigned int reg_v = 0;
+	u32 cmd = 0, cnt = 0, addr1 = 0, addr2 = 0;
+	int ret;
+
+	info = (struct nand_drv *)nand_get_controller_data(chip);
+	/*
+	 * Write out the command to the device.
+	 *
+	 * Only command NAND_CMD_RESET or NAND_CMD_READID will come
+	 * here before mtd->writesize is initialized.
+	 */
+
+	/* Emulate NAND_CMD_READOOB */
+	if (command == NAND_CMD_READOOB) {
+		assert(mtd->writesize != 0);
+		column += mtd->writesize;
+		command = NAND_CMD_READ0;
+	}
+
+	/* Reset FIFO before issue new command */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			ECC_RESET_ALL);
+	ret =
+	    readl_poll_timeout(&info->reg->flash_nf_ecc_reset, reg_v,
+			       !(reg_v & RESET_NFLASH_FIFO), FLASH_SHORT_DELAY);
+	if (ret) {
+		printf("FIFO reset timeout\n");
+		clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+				ECC_RESET_ALL);
+		udelay(10);
+	}
+
+	/* Reset FIFO index
+	 * Next read start from flash_nf_data[0]
+	 */
+	info->fifo_index = 0;
+
+	clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(11, 10),
+			NFLASH_REG_WIDTH_8);
+
+	/*
+	 * Program and erase have their own busy handlers
+	 * status and sequential in needs no delay
+	 */
+	switch (command) {
+	case NAND_CMD_READID:
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_READID);
+		/* 1 byte CMD cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0),
+				REG_CMD_COUNT_1TOGO);
+		/* 1 byte CMD cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4),
+				REG_ADDR_COUNT_1);
+		/* Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				REG_DATA_COUNT_DATA_4);
+		/* 0 OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				REG_OOB_COUNT_EMPTY);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				column & ADDR1_MASK2);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				0);
+
+		/* clear FLASH_NF_ACCESS */
+		clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0),
+				DISABLE_AUTO_RESET);
+
+		break;
+	case NAND_CMD_PARAM:
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_PARAM);
+		/* 1 byte CMD cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0),
+				REG_CMD_COUNT_1TOGO);
+		/* 1 byte ADDR cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4),
+				REG_ADDR_COUNT_1);
+		/* Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				(SZ_4K - 1) << 8);
+		/* 0 OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				REG_OOB_COUNT_EMPTY);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				column & ADDR1_MASK2);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				0);
+
+		break;
+	case NAND_CMD_READ0:
+		if (chip->chipsize < SZ_32M) {
+			cmd = NAND_CMD_READ0;
+			cnt = REG_CMD_COUNT_1TOGO | REG_ADDR_COUNT_3;
+			addr1 = (((page_addr & ADDR1_MASK0) << 8));
+			addr2 = ((page_addr & ADDR2_MASK0) >> 24);
+		} else if (chip->chipsize >= SZ_32M &&
+			   (chip->chipsize <= SZ_128M)) {
+			cmd = NAND_CMD_READ0;
+			cnt = REG_ADDR_COUNT_4;
+			if (mtd->writesize > (REG_DATA_COUNT_512_DATA >> 8)) {
+				cmd |= (NAND_CMD_READSTART << 8);
+				cnt |= REG_CMD_COUNT_2TOGO;
+			} else {
+				cnt |= REG_CMD_COUNT_1TOGO;
+			}
+			addr1 = ((page_addr << 16) | (column & ADDR1_MASK1));
+			addr2 = (page_addr >> 16);
+		} else {
+			cmd = NAND_CMD_READ0 | (NAND_CMD_READSTART << 8);
+			cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_5;
+			addr1 = ((page_addr << 16) | (column & ADDR1_MASK1));
+			addr2 = (page_addr >> 16);
+		}
+
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				cmd);
+		/* CMD & ADDR cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(7, 0), cnt);
+		/* Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				(mtd->writesize - 1) << 8);
+		/* OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				(mtd->oobsize - 1) << 22);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				addr1);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				addr2);
+
+		return;
+	case NAND_CMD_SEQIN:
+		if (chip->chipsize < SZ_32M) {
+			cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_3;
+			addr1 = (((page_addr & ADDR1_MASK0) << 8));
+			addr2 = ((page_addr & ADDR2_MASK0) >> 24);
+		} else if (chip->chipsize >= SZ_32M &&
+			   (chip->chipsize <= SZ_128M)) {
+			cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_4;
+			addr1 = ((page_addr << 16) | (column & ADDR1_MASK1));
+			addr2 = (page_addr >> 16);
+		} else {
+			cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_5;
+			addr1 = ((page_addr << 16) | (column & ADDR1_MASK1));
+			addr2 = (page_addr >> 16);
+		}
+
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_SEQIN | (NAND_CMD_PAGEPROG << 8));
+		/* CMD cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(7, 0), cnt);
+		/* Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				(mtd->writesize - 1) << 8);
+		/* OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				(mtd->oobsize - 1) << 22);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				addr1);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				addr2);
+
+		return;
+	case NAND_CMD_PAGEPROG:
+		return;
+	case NAND_CMD_ERASE1:
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_ERASE1 | (NAND_CMD_ERASE2 << 8));
+		/* 2 byte CMD cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0),
+				REG_CMD_COUNT_2TOGO);
+		/* 3 byte ADDR cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4),
+				REG_ADDR_COUNT_3);
+		/* 0 Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				REG_DATA_COUNT_EMPTY);
+		/* 0 OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				REG_OOB_COUNT_EMPTY);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				page_addr);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				0);
+
+		/* Issue command */
+		clrsetbits_le32(&info->reg->flash_flash_access_start,
+				GENMASK(31, 0), NFLASH_GO | NFLASH_RD);
+		break;
+	case NAND_CMD_ERASE2:
+		return;
+	case NAND_CMD_STATUS:
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_STATUS);
+		/* 1 byte CMD cycle */
+		clrbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0));
+		/* 0 byte Addr cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4),
+				REG_ADDR_COUNT_EMPTY);
+		/* 1 Data cycle */
+		clrbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8));
+		/* 0 OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				REG_OOB_COUNT_EMPTY);
+
+		break;
+	case NAND_CMD_RESET:
+		/* Command */
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_RESET);
+		/* 1 byte CMD cycle */
+		clrbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0));
+		/* 0 byte Addr cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4),
+				REG_ADDR_COUNT_EMPTY);
+		/* 0 Data cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8),
+				REG_DATA_COUNT_EMPTY);
+		/* 0 OOB cycle */
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22),
+				REG_OOB_COUNT_EMPTY);
+
+		/* addresses */
+		clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0),
+				column & ADDR1_MASK2);
+		clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0),
+				0);
+
+		/* Issue command */
+		clrsetbits_le32(&info->reg->flash_flash_access_start,
+				GENMASK(31, 0), NFLASH_GO | NFLASH_WT);
+
+		break;
+	case NAND_CMD_RNDOUT:
+	default:
+		printf("%s: Unsupported command %d\n", __func__, command);
+		return;
+	}
+
+	if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO))
+		printf("Command 0x%02X timeout\n", command);
+}
+
+/**
+ * Set up NAND bus width and page size
+ *
+ * @param info		nand_info structure
+ * @return 0 if ok, -1 on error
+ */
+static int set_bus_width_page_size(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+
+	if (info->config.width == SZ_8) {
+		clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0),
+				NFLASH_REG_WIDTH_8);
+	} else if (info->config.width == SZ_16) {
+		clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0),
+				NFLASH_REG_WIDTH_16);
+	} else {
+		debug("%s: Unsupported bus width %d\n", __func__,
+		      info->config.width);
+		return -1;
+	}
+
+	if (mtd->writesize == SZ_512) {
+		setbits_le32(&info->reg->flash_type, FLASH_TYPE_512);
+	} else if (mtd->writesize == SZ_2K) {
+		setbits_le32(&info->reg->flash_type, FLASH_TYPE_2K);
+	} else if (mtd->writesize == SZ_4K) {
+		setbits_le32(&info->reg->flash_type, FLASH_TYPE_4K);
+	} else if (mtd->writesize == SZ_8K) {
+		setbits_le32(&info->reg->flash_type, FLASH_TYPE_8K);
+	} else {
+		debug("%s: Unsupported page size %d\n", __func__,
+		      mtd->writesize);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int ca_do_bch_correction(struct nand_chip *chip,
+				unsigned int err_num, u8 *buff_ptr, int i)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	unsigned int reg_v, err_loc0, err_loc1;
+	int k, max_bitflips;
+
+	for (k = 0; k < (err_num + 1) / 2; k++) {
+		reg_v = readl(&info->reg->flash_nf_bch_error_loc01 + k);
+		err_loc0 = reg_v & BCH_ERR_LOC_MASK;
+		err_loc1 = (reg_v >> 16) & BCH_ERR_LOC_MASK;
+
+		if (err_loc0 / 8 < BCH_DATA_UNIT) {
+			printf("pdata[%x]:%x =>", ((i / chip->ecc.bytes) *
+				chip->ecc.size + ((reg_v & 0x1fff) >> 3)),
+				buff_ptr[(reg_v & 0x1fff) >> 3]);
+
+			buff_ptr[err_loc0 / 8] ^=
+				(1 << (reg_v & BCH_CORRECT_LOC_MASK));
+
+			printf("%x\n", buff_ptr[(reg_v & 0x1fff) >> 3]);
+
+			max_bitflips++;
+		}
+
+		if (((k + 1) * 2) <= err_num && ((err_loc1 / 8) <
+						 BCH_DATA_UNIT)) {
+			printf("pdata[%x]:%x =>", ((i / chip->ecc.bytes) *
+				chip->ecc.size + (((reg_v >> 16) & 0x1fff) >>
+				3)), buff_ptr[((reg_v >> 16) & 0x1fff) >> 3]);
+
+			buff_ptr[err_loc1 / 8] ^= (1 << ((reg_v >> 16) &
+						   BCH_CORRECT_LOC_MASK));
+
+			printf("%x\n", buff_ptr[((reg_v >> 16) & 0x1fff) >> 3]);
+
+			max_bitflips++;
+		}
+	}
+
+	return max_bitflips;
+}
+
+static int ca_do_bch_decode(struct mtd_info *mtd, struct nand_chip *chip,
+			    const u8 *buf, int page, unsigned int addr)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	unsigned int reg_v, err_num;
+	unsigned char *ecc_code = chip->buffers->ecccode;
+	unsigned char *ecc_end_pos;
+	int ret, i, j, k, n, step, eccsteps, max_bitflips = 0;
+	u8 *buff_ptr = (u8 *)buf;
+
+	for (i = 0; i < chip->ecc.total; i++)
+		ecc_code[i] = chip->oob_poi[eccoob.eccpos[i]];
+
+	for (i = 0, eccsteps = chip->ecc.steps; eccsteps;
+	     i += chip->ecc.bytes, eccsteps--) {
+		ecc_end_pos = ecc_code + chip->ecc.bytes;
+
+		for (j = 0, k = 0; j < chip->ecc.bytes; j += 4, k++) {
+			reg_v = 0;
+			for (n = 0; n < 4 && ecc_code != ecc_end_pos;
+			     ++n, ++ecc_code) {
+				reg_v |= *ecc_code << (8 * n);
+			}
+			clrsetbits_le32(&info->reg->flash_nf_bch_oob0 + k,
+					GENMASK(31, 0), reg_v);
+		}
+
+		/* Clear ECC buffer */
+		setbits_le32(&info->reg->flash_nf_ecc_reset, RESET_NFLASH_ECC);
+		ret = readl_poll_timeout(&info->reg->flash_nf_ecc_reset, reg_v,
+					 !(reg_v & RESET_NFLASH_ECC),
+					 FLASH_SHORT_DELAY);
+		if (ret)
+			pr_err("Reset ECC buffer fail\n");
+
+		clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(8, 8),
+				BCH_DISABLE);
+
+		/* Start BCH */
+		step = i / chip->ecc.bytes;
+		clrsetbits_le32(&info->reg->flash_nf_bch_control,
+				GENMASK(6, 4), step << 4);
+		setbits_le32(&info->reg->flash_nf_bch_control, BCH_ENABLE);
+		udelay(10);
+		setbits_le32(&info->reg->flash_nf_bch_control, BCH_COMPARE);
+
+		ret = readl_poll_timeout(&info->reg->flash_nf_bch_status, reg_v,
+					 (reg_v & BCH_DECO_DONE),
+					 FLASH_SHORT_DELAY);
+		if (ret)
+			pr_err("ECC Decode timeout\n");
+
+		/* Stop compare */
+		clrbits_le32(&info->reg->flash_nf_bch_control, BCH_COMPARE);
+
+		reg_v = readl(&info->reg->flash_nf_bch_status);
+		err_num = (reg_v >> 8) & BCH_ERR_NUM_MASK;
+		reg_v &= BCH_ERR_MASK;
+
+		/* Uncorrectable */
+		if (reg_v == BCH_UNCORRECTABLE) {
+			max_bitflips =
+			nand_check_erased_ecc_chunk(buff_ptr,
+						    chip->ecc.size,
+						    &chip->buffers->ecccode[i],
+						    chip->ecc.bytes,
+						    NULL, 0,
+						    chip->ecc.strength);
+
+			if (max_bitflips) {
+				mtd->ecc_stats.failed++;
+				pr_err("Uncorrectable error\n");
+				pr_err(" Page:%x  step:%d\n", page, step);
+
+				return -1;
+			}
+		} else if (reg_v == BCH_CORRECTABLE_ERR) {
+			printf("Correctable error(%x)!! addr:%lx\n",
+			       err_num, (unsigned long)addr - mtd->writesize);
+			printf("Dst buf: %p [ColSel:%x ]\n",
+			       buff_ptr + reg_v * BCH_DATA_UNIT, step);
+
+			max_bitflips =
+			   ca_do_bch_correction(chip, err_num, buff_ptr, i);
+		}
+
+		buff_ptr += BCH_DATA_UNIT;
+	}
+
+	/* Disable BCH */
+	clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(31, 0),
+			BCH_DISABLE);
+
+	return max_bitflips;
+}
+
+static int ca_do_bch_encode(struct mtd_info *mtd, struct nand_chip *chip,
+			    int page)
+{
+	struct nand_drv *info;
+	unsigned int reg_v;
+	int i, j, n, eccsteps, gen_index;
+
+	info = (struct nand_drv *)nand_get_controller_data(chip);
+
+	for (i = 0, n = 0, eccsteps = chip->ecc.steps; eccsteps;
+	     i += chip->ecc.bytes, eccsteps--, n++) {
+		gen_index = 0;
+		for (j = 0; j < chip->ecc.bytes; j += 4, gen_index++) {
+			reg_v =
+			    readl(&info->reg->flash_nf_bch_gen0_0 + gen_index +
+				  18 * n);
+			chip->oob_poi[eccoob.eccpos[i + j]] = reg_v & OOB_MASK;
+			chip->oob_poi[eccoob.eccpos[i + j + 1]] =
+			    (reg_v >> 8) & OOB_MASK;
+			chip->oob_poi[eccoob.eccpos[i + j + 2]] =
+			    (reg_v >> 16) & OOB_MASK;
+			chip->oob_poi[eccoob.eccpos[i + j + 3]] =
+			    (reg_v >> 24) & OOB_MASK;
+		}
+	}
+
+	/* Disable BCH */
+	clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(8, 8),
+			BCH_DISABLE);
+
+	return 0;
+}
+
+/**
+ * Page read/write function
+ *
+ * @param mtd		mtd info structure
+ * @param chip		nand chip info structure
+ * @param buf		data buffer
+ * @param page		page number
+ * @param with_ecc	1 to enable ECC, 0 to disable ECC
+ * @param is_writing	0 for read, 1 for write
+ * @return		0 when successfully completed
+ *			-ETIMEDOUT when command timeout
+ */
+static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip,
+			const u8 *buf, int page, int with_ecc, int is_writing)
+{
+	unsigned int reg_v, ext_addr, addr, dma_index;
+	struct tx_descriptor_t *tx_desc;
+	struct rx_descriptor_t *rx_desc;
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	/* reset ecc control */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			RESET_NFLASH_ECC);
+
+	/*  flash interrupt */
+	clrsetbits_le32(&info->reg->flash_flash_interrupt, GENMASK(0, 0),
+			REGIRQ_CLEAR);
+
+	/* reset ecc control */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			RESET_NFLASH_ECC);
+
+	/* Disable TXQ */
+	clrbits_le32(&info->dma_nand->dma_q_txq_control, GENMASK(0, 0));
+
+	/* Clear interrupt */
+	setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, GENMASK(0, 0));
+	setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, GENMASK(0, 0));
+
+	if (with_ecc == 1) {
+		switch (info->config.nand_ecc_strength) {
+		case ECC_STRENGTH_8:
+			reg_v = BCH_ERR_CAP_8;
+			break;
+		case ECC_STRENGTH_16:
+			reg_v = BCH_ERR_CAP_16;
+			break;
+		case ECC_STRENGTH_24:
+			reg_v = BCH_ERR_CAP_24;
+			break;
+		case ECC_STRENGTH_40:
+			reg_v = BCH_ERR_CAP_40;
+			break;
+		default:
+			reg_v = BCH_ERR_CAP_16;
+			break;
+		}
+		reg_v |= BCH_ENABLE;
+
+		/* BCH decode for flash read */
+		if (is_writing == 0)
+			reg_v |= BCH_DECODE;
+		clrsetbits_le32(&info->reg->flash_nf_bch_control,
+				GENMASK(31, 0), reg_v);
+	} else {
+		clrsetbits_le32(&info->reg->flash_nf_bch_control,
+				GENMASK(31, 0), 0);
+	}
+
+	/* Fill Extend address */
+	ext_addr = ((page << chip->page_shift) / EXT_ADDR_MASK);
+
+	clrsetbits_le32(&info->reg->flash_nf_access,
+			GENMASK(7, 0), (uintptr_t)ext_addr);
+
+	addr = (uintptr_t)((page << chip->page_shift) % EXT_ADDR_MASK);
+	addr = (uintptr_t)(addr + info->flash_base);
+
+	dma_index = readl(&info->dma_nand->dma_q_txq_wptr) & CA_DMA_Q_PTR_MASK;
+
+	tx_desc = info->tx_desc;
+	rx_desc = info->rx_desc;
+
+	/* TX/RX descriptor for page data */
+	tx_desc[dma_index].own = OWN_DMA;
+	tx_desc[dma_index].buf_len = mtd->writesize;
+	rx_desc[dma_index].own = OWN_DMA;
+	rx_desc[dma_index].buf_len = mtd->writesize;
+	if (is_writing == 0) {
+		tx_desc[dma_index].buf_adr = (uintptr_t)addr;
+		rx_desc[dma_index].buf_adr = (uintptr_t)(buf);
+	} else {
+		tx_desc[dma_index].buf_adr = (uintptr_t)buf;
+		rx_desc[dma_index].buf_adr = (uintptr_t)(addr);
+	}
+
+	dma_index++;
+	dma_index %= CA_DMA_DESC_NUM;
+
+	/* TX/RX descriptor for OOB area */
+	addr = (uintptr_t)(addr + mtd->writesize);
+	tx_desc[dma_index].own = OWN_DMA;
+	tx_desc[dma_index].buf_len = mtd->oobsize;
+	rx_desc[dma_index].own = OWN_DMA;
+	rx_desc[dma_index].buf_len = mtd->oobsize;
+	if (is_writing) {
+		tx_desc[dma_index].buf_adr = (uintptr_t)(chip->oob_poi);
+		rx_desc[dma_index].buf_adr = (uintptr_t)addr;
+	} else {
+		tx_desc[dma_index].buf_adr = (uintptr_t)addr;
+		rx_desc[dma_index].buf_adr = (uintptr_t)(chip->oob_poi);
+		dma_index++;
+		dma_index %= CA_DMA_DESC_NUM;
+	}
+
+	if (is_writing == 1) {
+		clrsetbits_le32(&info->reg->flash_fifo_control, GENMASK(1, 0),
+				FIFO_WRITE);
+	} else {
+		clrsetbits_le32(&info->reg->flash_fifo_control, GENMASK(1, 0),
+				FIFO_READ);
+	}
+
+	/* Start FIFO request */
+	clrsetbits_le32(&info->reg->flash_flash_access_start, GENMASK(2, 2),
+			NFLASH_FIFO_REQ);
+
+	/* Update DMA write pointer */
+	clrsetbits_le32(&info->dma_nand->dma_q_txq_wptr, GENMASK(12, 0),
+			dma_index);
+
+	/* Start DMA */
+	clrsetbits_le32(&info->dma_nand->dma_q_txq_control, GENMASK(0, 0),
+			TX_DMA_ENABLE);
+
+	/* Wait TX DMA done */
+	ret =
+	    readl_poll_timeout(&info->dma_nand->dma_q_txq_coal_interrupt,
+			       reg_v, (reg_v & 1), FLASH_LONG_DELAY);
+	if (ret) {
+		pr_err("TX DMA timeout\n");
+		return -ETIMEDOUT;
+	}
+	/* clear tx interrupt */
+	setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, 1);
+
+	/* Wait RX DMA done */
+	ret =
+	    readl_poll_timeout(&info->dma_nand->dma_q_rxq_coal_interrupt, reg_v,
+			       (reg_v & 1), FLASH_LONG_DELAY);
+	if (ret) {
+		pr_err("RX DMA timeout\n");
+		return -ETIMEDOUT;
+	}
+	/* clear rx interrupt */
+	setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, 1);
+
+	/* wait NAND CMD done */
+	if (is_writing == 0) {
+		if (!nand_waitfor_cmd_completion(info->reg, NFLASH_FIFO_REQ))
+			printf("%s: Command timeout\n", __func__);
+	}
+
+	/* Update DMA read pointer */
+	clrsetbits_le32(&info->dma_nand->dma_q_rxq_rptr, GENMASK(12, 0),
+			dma_index);
+
+	/* ECC correction */
+	if (with_ecc == 1) {
+		ret =
+		    readl_poll_timeout(&info->reg->flash_nf_bch_status,
+				       reg_v, (reg_v & BCH_GEN_DONE),
+				       FLASH_LONG_DELAY);
+
+		if (ret) {
+			pr_err("BCH_GEN timeout! flash_nf_bch_status=[0x%x]\n",
+			       reg_v);
+			return -ETIMEDOUT;
+		}
+
+		if (is_writing == 0)
+			ca_do_bch_decode(mtd, chip, buf, page, addr);
+		else
+			ca_do_bch_encode(mtd, chip, page);
+	}
+
+	if (is_writing) {
+		dma_index++;
+		dma_index %= CA_DMA_DESC_NUM;
+
+		/* Update DMA R/W pointer */
+		clrsetbits_le32(&info->dma_nand->dma_q_txq_wptr, GENMASK(12, 0),
+				dma_index);
+
+		/* Wait TX DMA done */
+		ret =
+		   readl_poll_timeout(&info->dma_nand->dma_q_txq_coal_interrupt,
+				      reg_v, (reg_v & 1), FLASH_LONG_DELAY);
+		if (ret) {
+			pr_err("TX DMA timeout\n");
+			return -ETIMEDOUT;
+		}
+		/* clear tx interrupt */
+		setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, 1);
+
+		/* Wait RX DMA done */
+		ret =
+		   readl_poll_timeout(&info->dma_nand->dma_q_rxq_coal_interrupt,
+				      reg_v, (reg_v & 1), FLASH_LONG_DELAY);
+		if (ret) {
+			pr_err("RX DMA timeout\n");
+			return -ETIMEDOUT;
+		}
+		/* clear rx interrupt */
+		setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, 1);
+
+		/* wait NAND CMD done */
+		if (!nand_waitfor_cmd_completion(info->reg, NFLASH_FIFO_REQ))
+			printf("%s: Command timeout\n", __func__);
+
+		/* Update DMA R/W pointer */
+		clrsetbits_le32(&info->dma_nand->dma_q_rxq_rptr, GENMASK(12, 0),
+				dma_index);
+	}
+
+	return 0;
+}
+
+/**
+ * Hardware ecc based page read function
+ *
+ * @param mtd	mtd info structure
+ * @param chip	nand chip info structure
+ * @param buf	buffer to store read data
+ * @param page	page number to read
+ * @return	0 when successfully completed
+ *		-ETIMEDOUT when command timeout
+ */
+static int nand_read_page_hwecc(struct mtd_info *mtd,
+				struct nand_chip *chip, uint8_t *buf,
+				int oob_required, int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	ret = nand_rw_page(mtd, chip, buf, page, 1, 0);
+	if (ret)
+		return ret;
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			ECC_RESET_ALL);
+
+	return 0;
+}
+
+/**
+ * Hardware ecc based page write function
+ *
+ * @param mtd	mtd info structure
+ * @param chip	nand chip info structure
+ * @param buf	data buffer
+ * @return	0 when successfully completed
+ *		-ETIMEDOUT when command timeout
+ */
+static int nand_write_page_hwecc(struct mtd_info *mtd,
+				 struct nand_chip *chip, const uint8_t *buf,
+				 int oob_required, int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	ret = nand_rw_page(mtd, chip, (uint8_t *)buf, page, 1, 1);
+	if (ret)
+		return ret;
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			ECC_RESET_ALL);
+
+	return 0;
+}
+
+/**
+ * Read raw page data without ecc
+ *
+ * @param mtd	mtd info structure
+ * @param chip	nand chip info structure
+ * @param buf	buffer to store read data
+ * @param page	page number to read
+ * @return	0 when successfully completed
+ *		-ETIMEDOUT when command timeout
+ */
+static int nand_read_page_raw(struct mtd_info *mtd,
+			      struct nand_chip *chip, uint8_t *buf,
+			      int oob_required, int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	ret = nand_rw_page(mtd, chip, buf, page, 0, 0);
+	if (ret)
+		return ret;
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			ECC_RESET_ALL);
+
+	return 0;
+}
+
+/**
+ * Raw page write function
+ *
+ * @param mtd	mtd info structure
+ * @param chip	nand chip info structure
+ * @param buf	data buffer
+ * @return	0 when successfully completed
+ *		-ETIMEDOUT when command timeout
+ */
+static int nand_write_page_raw(struct mtd_info *mtd,
+			       struct nand_chip *chip, const uint8_t *buf,
+			       int oob_required, int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	ret = nand_rw_page(mtd, chip, buf, page, 0, 1);
+	if (ret)
+		return ret;
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0),
+			ECC_RESET_ALL);
+
+	return 0;
+}
+
+/**
+ * OOB data read/write function
+ *
+ * @param mtd		mtd info structure
+ * @param chip		nand chip info structure
+ * @param page		page number to read
+ * @param with_ecc	1 to enable ECC, 0 to disable ECC
+ * @param is_writing	0 for read, 1 for write
+ * @return		0 when successfully completed
+ *			-ETIMEDOUT when command timeout
+ */
+static int nand_rw_oob(struct mtd_info *mtd, struct nand_chip *chip,
+		       int page, int with_ecc, int is_writing)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	u32 reg_val;
+	int rw_index;
+
+	if (is_writing) {
+		reg_val = NFLASH_GO | NFLASH_WT;
+		pwrite = (unsigned int *)chip->oob_poi;
+	} else {
+		reg_val = NFLASH_GO | NFLASH_RD;
+		pread = (unsigned int *)chip->oob_poi;
+	}
+
+	for (rw_index = 0; rw_index < mtd->oobsize / 4; rw_index++) {
+		clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0),
+				NFLASH_REG_WIDTH_32);
+		if (is_writing)
+			clrsetbits_le32(&info->reg->flash_nf_data,
+					GENMASK(31, 0), pwrite[rw_index]);
+
+		clrsetbits_le32(&info->reg->flash_flash_access_start,
+				GENMASK(11, 10), reg_val);
+
+		if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO))
+			printf("%s: Command timeout\n", __func__);
+
+		if (!is_writing)
+			pread[rw_index] = readl(&info->reg->flash_nf_data);
+	}
+	return 0;
+}
+
+/**
+ * OOB data read function
+ *
+ * @param mtd		mtd info structure
+ * @param chip		nand chip info structure
+ * @param page		page number to read
+ */
+static int nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+	if (mtd->writesize <= (REG_DATA_COUNT_512_DATA >> 8))
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(7, 0),
+				NAND_CMD_READOOB);
+	ret = nand_rw_oob(mtd, chip, page, 0, 0);
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset,
+			GENMASK(31, 0), ECC_RESET_ALL);
+
+	return ret;
+}
+
+/**
+ * OOB data write function
+ *
+ * @param mtd	mtd info structure
+ * @param chip	nand chip info structure
+ * @param page	page number to write
+ * @return	0 when successfully completed
+ *		-ETIMEDOUT when command timeout
+ */
+static int nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
+			  int page)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(chip);
+	int ret;
+
+	chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
+	if (mtd->writesize <= (REG_DATA_COUNT_512_DATA >> 8)) {
+		clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0),
+				NAND_CMD_READOOB | (NAND_CMD_SEQIN << 8) |
+				(NAND_CMD_PAGEPROG << 16));
+		clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0),
+				REG_CMD_COUNT_3TOGO);
+	}
+	ret = nand_rw_oob(mtd, chip, page, 1, 1);
+
+	/* Reset FIFO */
+	clrsetbits_le32(&info->reg->flash_nf_ecc_reset,
+			GENMASK(31, 0), ECC_RESET_ALL);
+
+	return ret;
+}
+
+/**
+ * Decode NAND parameters from the device tree
+ *
+ * @param dev		Driver model device
+ * @param config	Device tree NAND configuration
+ */
+static int fdt_decode_nand(struct udevice *dev, struct nand_drv *info)
+{
+	int ecc_strength;
+
+	info->reg = (struct nand_ctlr *)dev_read_addr(dev);
+	info->dma_glb = (struct dma_global *)dev_read_addr_index(dev, 1);
+	info->dma_nand = (struct dma_ssp *)dev_read_addr_index(dev, 2);
+	info->config.enabled = dev_read_enabled(dev);
+	ecc_strength = dev_read_u32_default(dev, "nand-ecc-strength", 16);
+	info->flash_base =
+	    dev_read_u32_default(dev, "nand_flash_base_addr", NAND_BASE_ADDR);
+
+	switch (ecc_strength) {
+	case ECC_STRENGTH_8:
+		info->config.nand_ecc_strength = ECC_STRENGTH_8;
+		break;
+	case ECC_STRENGTH_16:
+		info->config.nand_ecc_strength = ECC_STRENGTH_16;
+		break;
+	case ECC_STRENGTH_24:
+		info->config.nand_ecc_strength = ECC_STRENGTH_24;
+		break;
+	case ECC_STRENGTH_40:
+		info->config.nand_ecc_strength = ECC_STRENGTH_40;
+		break;
+	default:
+		info->config.nand_ecc_strength = ECC_STRENGTH_16;
+	}
+
+	return 0;
+}
+
+/**
+ * config flash type
+ *
+ * @param chip	nand chip info structure
+ */
+static void nand_config_flash_type(struct nand_chip *nand)
+{
+	struct nand_drv *info =
+	    (struct nand_drv *)nand_get_controller_data(nand);
+	struct mtd_info *mtd = nand_to_mtd(nand);
+
+	switch (mtd->writesize) {
+	case WRITE_SIZE_512:
+		clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0),
+				FLASH_PIN | FLASH_TYPE_512);
+		break;
+	case WRITE_SIZE_2048:
+		clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0),
+				FLASH_PIN | FLASH_TYPE_2K);
+		break;
+	case WRITE_SIZE_4096:
+		clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0),
+				FLASH_PIN | FLASH_TYPE_4K);
+		break;
+	case WRITE_SIZE_8192:
+		clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0),
+				FLASH_PIN | FLASH_TYPE_8K);
+		break;
+	default:
+		pr_err("Unsupported page size(0x%x)!", nand->ecc.size);
+	}
+}
+
+/**
+ * config oob layout
+ *
+ * @param chip  nand chip info structure
+ * @return	0 when successfully completed
+ *		-EINVAL when ECC bytes exceed OOB size
+ */
+static int nand_config_oob_layout(struct nand_chip *nand)
+{
+	int i, ecc_start_offset;
+	struct mtd_info *mtd = nand_to_mtd(nand);
+
+	/* Calculate byte count for ECC */
+	eccoob.eccbytes = mtd->writesize / nand->ecc.size * nand->ecc.bytes;
+
+	if (mtd->oobsize < eccoob.eccbytes) {
+		pr_err("Spare area(%d) too small for BCH%d\n", nand->ecc.bytes,
+		       nand->ecc.strength / 8);
+		pr_err("page_sz: %d\n", nand->ecc.size);
+		pr_err("oob_sz: %d\n", nand->ecc.bytes);
+		return -EINVAL;
+	}
+
+	/* Update OOB layout */
+	ecc_start_offset = mtd->oobsize - eccoob.eccbytes;
+	memset(eccoob.eccpos, 0, sizeof(eccoob.eccpos));
+	for (i = 0; i < eccoob.eccbytes; ++i)
+		eccoob.eccpos[i] = i + ecc_start_offset;
+
+	/* Unused spare area
+	 * OOB[0] is bad block marker.
+	 * Extra two byte is reserved as
+	 * erase marker just right before ECC code.
+	 */
+	eccoob.oobavail = nand->ecc.bytes - eccoob.eccbytes - 2;
+	eccoob.oobfree[0].offset = 2;
+	eccoob.oobfree[0].length =
+	    mtd->oobsize - eccoob.eccbytes - eccoob.oobfree[0].offset - 1;
+
+	return 0;
+}
+
+static int ca_nand_probe(struct udevice *dev)
+{
+	struct ca_nand_info *ca_nand = dev_get_priv(dev);
+	struct nand_chip *nand = &ca_nand->nand_chip;
+	struct nand_drv *info = &ca_nand->nand_ctrl;
+	struct fdt_nand *config = &info->config;
+	struct mtd_info *our_mtd;
+	int ret;
+
+	if (fdt_decode_nand(dev, info)) {
+		printf("Could not decode nand-flash in device tree\n");
+		return -1;
+	}
+	if (!config->enabled)
+		return -1;
+
+	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.layout = &eccoob;
+
+	nand->cmdfunc = ca_nand_command;
+	nand->read_byte = read_byte;
+	nand->read_buf = read_buf;
+	nand->ecc.read_page = nand_read_page_hwecc;
+	nand->ecc.write_page = nand_write_page_hwecc;
+	nand->ecc.read_page_raw = nand_read_page_raw;
+	nand->ecc.write_page_raw = nand_write_page_raw;
+	nand->ecc.read_oob = nand_read_oob;
+	nand->ecc.write_oob = nand_write_oob;
+	nand->ecc.strength = config->nand_ecc_strength;
+	nand->select_chip = nand_select_chip;
+	nand->dev_ready = nand_dev_ready;
+	nand_set_controller_data(nand, &ca_nand->nand_ctrl);
+
+	/* Disable subpage writes as we do not provide ecc->hwctl */
+	nand->options |= NAND_NO_SUBPAGE_WRITE | NAND_SKIP_BBTSCAN;
+
+	/* Configure flash type as P-NAND */
+	clrsetbits_le32(&info->reg->flash_type, FLASH_PIN,
+			FLASH_TYPE_4K | FLASH_SIZE_436OOB);
+	config->width = FLASH_WIDTH;
+
+	our_mtd = nand_to_mtd(nand);
+	ret = nand_scan_ident(our_mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL);
+	if (ret)
+		return ret;
+
+	nand->ecc.size = BCH_DATA_UNIT;
+	nand->ecc.bytes = BCH_GF_PARAM_M * (nand->ecc.strength / 8);
+
+	/* Reconfig flash type according to ONFI */
+	nand_config_flash_type(nand);
+
+	ret = set_bus_width_page_size(our_mtd);
+	if (ret)
+		return ret;
+
+	/* Set the bad block position */
+	nand->badblockpos =
+	    our_mtd->writesize >
+	    512 ? NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
+
+	/* Arrange OOB layout */
+	ret = nand_config_oob_layout(nand);
+	if (ret)
+		return ret;
+
+	/* Init DMA descriptor ring */
+	ret = init_nand_dma(nand);
+	if (ret)
+		return ret;
+
+	ret = nand_scan_tail(our_mtd);
+	if (ret)
+		return ret;
+
+	ret = nand_register(0, our_mtd);
+	if (ret) {
+		dev_err(dev, "Failed to register MTD: %d\n", ret);
+		return ret;
+	}
+
+	ret = set_bus_width_page_size(our_mtd);
+	if (ret)
+		return ret;
+
+	printf("P-NAND    : %s\n", our_mtd->name);
+	printf("Chip  Size: %lldMB\n", nand->chipsize / (1024 * 1024));
+	printf("Block Size: %dKB\n", our_mtd->erasesize / 1024);
+	printf("Page  Size: %dB\n", our_mtd->writesize);
+	printf("OOB   Size: %dB\n", our_mtd->oobsize);
+
+	return 0;
+}
+
+U_BOOT_DRIVER(cortina_nand) = {
+	.name = "CA-PNAND",
+	.id = UCLASS_MTD,
+	.of_match = cortina_nand_dt_ids,
+	.probe = ca_nand_probe,
+	.priv_auto = sizeof(struct ca_nand_info),
+};
+
+void board_nand_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_MTD,
+					  DM_DRIVER_GET(cortina_nand), &dev);
+	if (ret && ret != -ENODEV)
+		pr_err("Failed to initialize %s. (error %d)\n", dev->name, ret);
+}
diff --git a/drivers/mtd/nand/raw/cortina_nand.h b/drivers/mtd/nand/raw/cortina_nand.h
new file mode 100644
index 00000000000..1e3e3bfd055
--- /dev/null
+++ b/drivers/mtd/nand/raw/cortina_nand.h
@@ -0,0 +1,293 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2020 Cortina Access Inc..
+ */
+
+/* Cortina NAND definition */
+#define NAND_BASE_ADDR		0xE0000000
+#define BCH_GF_PARAM_M		14
+#define BCH_DATA_UNIT		1024
+#define FLASH_SHORT_DELAY	100
+#define FLASH_LONG_DELAY	1000
+#define FLASH_WIDTH		16
+#define BBT_PAGE_MASK		0xffffff3f
+#define WRITE_SIZE_512		512
+#define WRITE_SIZE_2048		2048
+#define WRITE_SIZE_4096		4096
+#define WRITE_SIZE_8192		8192
+#define ECC_STRENGTH_8		8
+#define ECC_STRENGTH_16		16
+#define ECC_STRENGTH_24		24
+#define ECC_STRENGTH_40		40
+#define EMPTY_PAGE		0xff
+#define ADDR1_MASK0		0x00ffffff
+#define ADDR2_MASK0		0xff000000
+#define ADDR1_MASK1		0xffff
+#define ADDR1_MASK2		0xff
+#define OOB_MASK		0xff
+#define EXT_ADDR_MASK		0x8000000
+
+/* Status bits */
+#define NAND_STATUS_FAIL	0x01
+#define NAND_STATUS_FAIL_N1	0x02
+#define NAND_STATUS_TRUE_READY	0x20
+#define NAND_STATUS_READY	0x40
+#define NAND_STATUS_WP		0x80
+
+/* Bit field in FLAS_TYPE */
+#define FLASH_PIN			BIT(15)
+#define FLASH_TYPE_512			0x4000
+#define FLASH_TYPE_2K			0x5000
+#define FLASH_TYPE_4K			0x6000
+#define FLASH_TYPE_8K			0x7000
+#define FLASH_SIZE_CONFIGURABLEOOB	(0x0 << 9)
+#define FLASH_SIZE_400OOB		(0x1 << 9)
+#define FLASH_SIZE_436OOB		(0x2 << 9)
+#define FLASH_SIZE_640OOB		(0x3 << 9)
+
+/* Bit field in FLASH_STATUS */
+#define NFLASH_READY	BIT(26)
+
+/* Bit field in FLASH_NF_ACCESS */
+#define NFLASH_ENABLE_ALTERNATIVE	(0x0 << 15)
+#define AUTO_RESET			BIT(16)
+#define DISABLE_AUTO_RESET		(0x0 << 16)
+#define NFLASH_REG_WIDTH_RESERVED	(0x3 << 10)
+#define NFLASH_REG_WIDTH_32		(0x2 << 10)
+#define NFLASH_REG_WIDTH_16		(0x1 << 10)
+#define NFLASH_REG_WIDTH_8		(0x0 << 10)
+
+/* Bit field in FLASH_NF_COUNT */
+#define REG_CMD_COUNT_EMPTY		0x3
+#define REG_CMD_COUNT_3TOGO		0x2
+#define REG_CMD_COUNT_2TOGO		0x1
+#define REG_CMD_COUNT_1TOGO		0x0
+#define REG_ADDR_COUNT_EMPTY		(0x7 << 4)
+#define REG_ADDR_COUNT_5		(0x4 << 4)
+#define REG_ADDR_COUNT_4		(0x3 << 4)
+#define REG_ADDR_COUNT_3		(0x2 << 4)
+#define REG_ADDR_COUNT_2		(0x1 << 4)
+#define REG_ADDR_COUNT_1		(0x0 << 4)
+#define REG_DATA_COUNT_EMPTY		(0x3fff << 8)
+#define REG_DATA_COUNT_512_DATA		(0x1FF << 8)
+#define REG_DATA_COUNT_2k_DATA		(0x7FF << 8)
+#define REG_DATA_COUNT_4k_DATA		(0xFFF << 8)
+#define REG_DATA_COUNT_DATA_1		(0x0 << 8)
+#define REG_DATA_COUNT_DATA_2		(0x1 << 8)
+#define REG_DATA_COUNT_DATA_3		(0x2 << 8)
+#define REG_DATA_COUNT_DATA_4		(0x3 << 8)
+#define REG_DATA_COUNT_DATA_5		(0x4 << 8)
+#define REG_DATA_COUNT_DATA_6		(0x5 << 8)
+#define REG_DATA_COUNT_DATA_7		(0x6 << 8)
+#define REG_DATA_COUNT_DATA_8		(0x7 << 8)
+#define REG_OOB_COUNT_EMPTY		(0x3ff << 22)
+
+/* Bit field in FLASH_FLASH_ACCESS_START */
+#define NFLASH_GO		BIT(0)
+#define NFLASH_FIFO_REQ		BIT(2)
+#define NFLASH_RD		BIT(13)
+#define NFLASH_WT		(BIT(12) | BIT(13))
+
+/* Bit field in FLASH_NF_ECC_RESET */
+#define RESET_NFLASH_RESET	BIT(2)
+#define RESET_NFLASH_FIFO	BIT(1)
+#define RESET_NFLASH_ECC	BIT(0)
+#define ECC_RESET_ALL \
+	RESET_NFLASH_RESET | RESET_NFLASH_FIFO | RESET_NFLASH_ECC
+
+/* Bit field in FLASH_NF_ECC_CONTROL */
+#define ENABLE_ECC_GENERATION	BIT(8)
+#define DISABLE_ECC_GENERATION	(0 << 8)
+
+/* Flash FIFO control */
+#define FIFO_READ		2
+#define FIFO_WRITE		3
+
+/* NFLASH INTERRUPT */
+#define REGIRQ_CLEAR		BIT(0)
+#define F_ADDR_ERR		2
+
+/* BCH ECC field definition */
+#define BCH_COMPARE		BIT(0)
+#define	BCH_ENABLE		BIT(8)
+#define	BCH_DISABLE		(0 << 8)
+#define	BCH_DECODE		BIT(1)
+#define	BCH_ENCODE		(0 << 1)
+#define BCH_DECO_DONE		BIT(30)
+#define BCH_GEN_DONE		BIT(31)
+#define	BCH_UNCORRECTABLE	0x3
+#define	BCH_CORRECTABLE_ERR	0x2
+#define	BCH_NO_ERR		0x1
+#define	BCH_BUSY		0x0
+#define BCH_ERR_MASK		0x3
+#define BCH_ERR_NUM_MASK	0x3F
+#define BCH_ERR_LOC_MASK	0x3FFF
+#define BCH_CORRECT_LOC_MASK	0x7
+#define BCH_ERR_CAP_8		(0x0 << 9)
+#define BCH_ERR_CAP_16		(0x1 << 9)
+#define BCH_ERR_CAP_24		(0x2 << 9)
+#define BCH_ERR_CAP_40		(0x3 << 9)
+
+#define BCH_GF_PARAM_M		14
+
+struct nand_ctlr {
+	/* Cortina NAND controller register */
+	u32 flash_id;
+	u32 flash_timeout;
+	u32 flash_status;
+	u32 flash_type;
+	u32 flash_flash_access_start;
+	u32 flash_flash_interrupt;
+	u32 flash_flash_mask;
+	u32 flash_fifo_control;
+	u32 flash_fifo_status;
+	u32 flash_fifo_address;
+	u32 flash_fifo_match_address;
+	u32 flash_fifo_data;
+	u32 flash_sf_access;
+	u32 flash_sf_ext_access;
+	u32 flash_sf_address;
+	u32 flash_sf_data;
+	u32 flash_sf_timing;
+	u32 resv[3];
+	u32 flash_pf_access;		// offset 0x050
+	u32 flash_pf_timing;
+	u32 resv1[2];
+	u32 flash_nf_access;		// offset 0x060
+	u32 flash_nf_count;
+	u32 flash_nf_command;
+	u32 flash_nf_address_1;
+	u32 flash_nf_address_2;
+	u32 flash_nf_data;
+	u32 flash_nf_timing;
+	u32 flash_nf_ecc_status;
+	u32 flash_nf_ecc_control;
+	u32 flash_nf_ecc_oob;
+	u32 flash_nf_ecc_gen0;
+	u32 resv3[15];
+	u32 flash_nf_ecc_reset;		// offset 0x0c8
+	u32 flash_nf_bch_control;
+	u32 flash_nf_bch_status;
+	u32 flash_nf_bch_error_loc01;
+	u32 resv4[19];
+	u32 flash_nf_bch_oob0;		// offset 0x124
+	u32 resv5[17];
+	u32 flash_nf_bch_gen0_0;	// offset 0x16c
+};
+
+/* Definition for DMA bitfield */
+#define TX_DMA_ENABLE	BIT(0)
+#define RX_DMA_ENABLE	BIT(0)
+#define DMA_CHECK_OWNER	BIT(1)
+#define OWN_DMA			0
+#define OWN_CPU			1
+
+#define CA_DMA_DEPTH	3
+#define CA_DMA_DESC_NUM	(BIT(0) << CA_DMA_DEPTH)
+#define CA_DMA_Q_PTR_MASK	0x1fff
+
+struct dma_q_base_depth_t {
+	u32 depth		:  4 ; /* bits 3:0 */
+	u32 base		: 28 ; /* bits 31:4 */
+};
+
+struct tx_descriptor_t {
+	unsigned int buf_adr; /* Buff addr */
+	unsigned int buf_adr_hi	:  8 ; /* bits 7:0 */
+	unsigned int buf_len	:  16 ;  /* bits 23:8 */
+	unsigned int sgm	:  1 ;  /* bits 24 */
+	unsigned int rsrvd	:  6 ;  /* bits 30:25 */
+	unsigned int own	:  1 ;  /* bits 31:31 */
+};
+
+struct rx_descriptor_t {
+	unsigned int buf_adr; /* Buff addr */
+	unsigned int buf_adr_hi	:  8 ; /* bits 7:0 */
+	unsigned int buf_len	: 16 ;  /* bits 23:8 */
+	unsigned int rsrvd	:  7 ;  /* bits 30:24 */
+	unsigned int own	:  1 ;  /* bits 31:31 */
+};
+
+struct dma_global {
+	u32 dma_glb_dma_lso_ctrl;
+	u32 dma_glb_lso_interrupt;
+	u32 dma_glb_lso_intenable;
+	u32 dma_glb_dma_lso_vlan_tag_type0;
+	u32 dma_glb_dma_lso_vlan_tag_type1;
+	u32 dma_glb_dma_lso_axi_user_sel0;
+	u32 dma_glb_axi_user_pat0;
+	u32 dma_glb_axi_user_pat1;
+	u32 dma_glb_axi_user_pat2;
+	u32 dma_glb_axi_user_pat3;
+	u32 dma_glb_fast_reg_pe0;
+	u32 dma_glb_fast_reg_pe1;
+	u32 dma_glb_dma_lso_tx_fdes_addr0;
+	u32 dma_glb_dma_lso_tx_fdes_addr1;
+	u32 dma_glb_dma_lso_tx_cdes_addr0;
+	u32 dma_glb_dma_lso_tx_cdes_addr1;
+	u32 dma_glb_dma_lso_tx_des_word0;
+	u32 dma_glb_dma_lso_tx_des_word1;
+	u32 dma_glb_dma_lso_lso_para_word0;
+	u32 dma_glb_dma_lso_lso_para_word1;
+	u32 dma_glb_dma_lso_debug0;
+	u32 dma_glb_dma_lso_debug1;
+	u32 dma_glb_dma_lso_debug2;
+	u32 dma_glb_dma_lso_spare0;
+	u32 dma_glb_dma_lso_spare1;
+	u32 dma_glb_dma_ssp_rx_ctrl;
+	u32 dma_glb_dma_ssp_tx_ctrl;
+	u32 dma_glb_dma_ssp_axi_user_sel0;
+	u32 dma_glb_dma_ssp_axi_user_sel1;
+	u32 dma_glb_dma_ssp_rx_fdes_addr0;
+	u32 dma_glb_dma_ssp_rx_fdes_addr1;
+	u32 dma_glb_dma_ssp_rx_cdes_addr0;
+	u32 dma_glb_dma_ssp_rx_cdes_addr1;
+	u32 dma_glb_dma_ssp_rx_des_word0;
+	u32 dma_glb_dma_ssp_rx_des_word1;
+	u32 dma_glb_dma_ssp_tx_fdes_addr0;
+	u32 dma_glb_dma_ssp_tx_fdes_addr1;
+	u32 dma_glb_dma_ssp_tx_cdes_addr0;
+	u32 dma_glb_dma_ssp_tx_cdes_addr1;
+	u32 dma_glb_dma_ssp_tx_des_word0;
+	u32 dma_glb_dma_ssp_tx_des_word1;
+	u32 dma_glb_dma_ssp_debug0;
+	u32 dma_glb_dma_ssp_debug1;
+	u32 dma_glb_dma_ssp_debug2;
+	u32 dma_glb_dma_ssp_spare0;
+	u32 dma_glb_dma_ssp_spare1;
+};
+
+struct dma_ssp {
+	u32 dma_q_rxq_control;
+	u32 dma_q_rxq_base_depth;
+	u32 dma_q_rxq_base;
+	u32 dma_q_rxq_wptr;
+	u32 dma_q_rxq_rptr;
+	u32 dma_q_rxq_pktcnt;
+	u32 dma_q_txq_control;
+	u32 dma_q_txq_base_depth;
+	u32 dma_q_txq_base;
+	u32 dma_q_txq_wptr;
+	u32 dma_q_txq_rptr;
+	u32 dma_q_txq_pktcnt;
+	u32 dma_q_rxq_interrupt;
+	u32 dma_q_rxq_intenable;
+	u32 dma_q_txq_interrupt;
+	u32 dma_q_txq_intenable;
+	u32 dma_q_rxq_misc_interrupt;
+	u32 dma_q_rxq_misc_intenable;
+	u32 dma_q_txq_misc_interrupt;
+	u32 dma_q_txq_misc_intenable;
+	u32 dma_q_rxq_coal_interrupt;
+	u32 dma_q_rxq_coal_intenable;
+	u32 dma_q_txq_coal_interrupt;
+	u32 dma_q_txq_coal_intenable;
+	u32 dma_q_rxq_frag_buff_addr0;
+	u32 dma_q_rxq_frag_buff_addr1;
+	u32 dma_q_rxq_frag_buff_size;
+	u32 dma_q_txq_frag_buff_addr0;
+	u32 dma_q_txq_frag_buff_addr1;
+	u32 dma_q_txq_frag_buff_size;
+	u32 dma_q_dma_spare_0;
+	u32 dma_q_dma_spare_1;
+};