From: Kuo-Jung Su <dant...@faraday-tech.com>
Faraday FTNANDC021 is a integrated NAND flash controller.
It use a build-in command table to abstract the underlying
NAND flash control logic.
For example:
Issuing a command 0x10 to FTNANDC021 would result in
a page write + a read status operation.
Signed-off-by: Kuo-Jung Su <dant...@faraday-tech.com>
CC: Scott Wood <scottw...@freescale.com>
---
Changes for v5:
- Update README for the description of CONFIG_SYS_FTNANDC021_TIMING.
- Drop redundant white space. (i.e. if (mtd->writesize >= ' '4096))
Changes for v4:
- Make it a separate patch, rather then a part of
Faraday A36x patch series
- Drop the faraday/nand.h to remove dependency to
Faraday A36x patch series.
- CONFIG_SYS_NAND_TIMING -> CONFIG_SYS_FTNANDC021_TIMING
- Remove non-ECC code.
- Implement private hwecc read/write_page functions
to get rid of .eccpos & .eccbytes.
- Use macro constants for timeout control
Changes for v3:
- Coding Style cleanup.
- Drop macros for wirtel()/readl(), call them directly.
- Always insert a blank line between declarations and code.
- Replace all the infinite wait loop with a timeout.
- Add '__iomem' to all the declaration of HW register pointers.
- Re-write this driver with ECC enabled and correct column address
handling for OOB read/write,
- Fix issuses addressed by Scott.
Changes for v2:
- Coding Style cleanup.
- Use readl(), writel(), clrsetbits_le32() to replace REG() macros.
- Use structure based hardware registers to replace the macro constants.
- Replace BIT() with BIT_MASK().
README | 6 +
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/ftnandc021.c | 607 +++++++++++++++++++++++++++++++++++++++++
include/faraday/ftnandc021.h | 146 ++++++++++
4 files changed, 760 insertions(+)
create mode 100644 drivers/mtd/nand/ftnandc021.c
create mode 100644 include/faraday/ftnandc021.h
diff --git a/README b/README
index 0d37d56..94c15e0 100644
--- a/README
+++ b/README
@@ -3879,6 +3879,12 @@ Low Level (hardware related) configuration options:
- drivers/mtd/nand/ndfc.c
- drivers/mtd/nand/mxc_nand.c
+- CONFIG_SYS_FTNANDC021_TIMING
+ This option specifies an array of customized timing parameters
+ for Faraday FTNANDC021 NAND flash controller.
+ e.g.
+ #define CONFIG_SYS_FTNANDC021_TIMING { 0x02240264, 0x42054209 }
+
- CONFIG_SYS_NDFC_EBC0_CFG
Sets the EBC0_CFG register for the NDFC. If not defined
a default value will be used.
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 35769c5..f6f89f0 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -63,6 +63,7 @@ COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
COBJS-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_nand.o
COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
COBJS-$(CONFIG_NAND_FSMC) += fsmc_nand.o
+COBJS-$(CONFIG_NAND_FTNANDC021) += ftnandc021.o
COBJS-$(CONFIG_NAND_JZ4740) += jz4740_nand.o
COBJS-$(CONFIG_NAND_KB9202) += kb9202_nand.o
COBJS-$(CONFIG_NAND_KIRKWOOD) += kirkwood_nand.o
diff --git a/drivers/mtd/nand/ftnandc021.c b/drivers/mtd/nand/ftnandc021.c
new file mode 100644
index 0000000..213b67a
--- /dev/null
+++ b/drivers/mtd/nand/ftnandc021.c
@@ -0,0 +1,607 @@
+/*
+ * Faraday NAND Flash Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dant...@faraday-tech.com>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/unaligned.h>
+#include <nand.h>
+#include <malloc.h>
+
+#include <faraday/ftnandc021.h>
+
+#define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 2) /* 250 ms */
+#define CFG_RST_TIMEOUT CONFIG_SYS_HZ /* 1 sec reset timeout */
+#define CFG_PIO_TIMEOUT (CONFIG_SYS_HZ >> 3) /* 125 ms */
+
+struct ftnandc021_chip {
+ void __iomem *regs;
+ int alen;
+ int pgsz;
+ int bksz;
+
+ int col; /* current column address */
+ int page; /* current row address/page index */
+ int cmd; /* current NAND command code */
+ int cmd_hc; /* current FTNANDC021 command code */
+};
+
+static struct nand_ecclayout ftnandc021_ecclayout[] = {
+ { /* page size = 512 (oob size = 16) */
+ .oobfree = {
+ { 9, 3 },
+ }
+ },
+ { /* page size = 2048 (oob size = 64) */
+ .oobfree = {
+ { 9, 3 },
+ },
+ },
+ { /* page size = 4096 (oob size = 128) */
+ .oobfree = {
+ { 9, 7 },
+ },
+ },
+};
+
+static inline int ftnandc021_ckst(struct ftnandc021_chip *priv)
+{
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ uint32_t st = readl(®s->idr[1]);
+
+ if (st & NAND_STATUS_FAIL)
+ return -EIO;
+
+ if (!(st & NAND_STATUS_READY))
+ return -EBUSY;
+
+ if (!(st & NAND_STATUS_WP))
+ return -EIO;
+
+ return 0;
+}
+
+static inline int ftnandc021_wait(struct ftnandc021_chip *priv)
+{
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ char rc = 'c';
+ ulong ts;
+
+ for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
+ if (readl(®s->sr) & SR_ECC) {
+ rc = 'e';
+ break;
+ }
+ if (!(readl(®s->acr) & ACR_START)) {
+ rc = 0;
+ break;
+ }
+ }
+
+ switch (rc) {
+ case 'e':
+ printf("ftnandc021: ecc timeout, cmd_hc=%d\n",
+ priv->cmd_hc);
+ break;
+ case 'c':
+ printf("ftnandc021: cmd timeout, cmd_hc=%d\n",
+ priv->cmd_hc);
+ break;
+ default:
+ break;
+ }
+
+ return rc ? -ETIMEDOUT : 0;
+}
+
+static int ftnandc021_read_page(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page)
+{
+ /*
+ * OOB has been read at ftnandc021_cmdfunc(),
+ * so we don't have to handle it here.
+ */
+ chip->read_buf(mtd, buf, mtd->writesize);
+ return 0;
+}
+
+static void ftnandc021_write_page(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ /*
+ * OOB has been written at ftnandc021_cmdfunc(),
+ * so we don't have to handle it here.
+ */
+ chip->write_buf(mtd, buf, mtd->writesize);
+}
+
+static int ftnandc021_read_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page)
+{
+ printf("ftnandc021: read_page_raw is not supported\n");
+ return -EIO;
+}
+
+static void ftnandc021_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ printf("ftnandc021: write_page_raw is not supported\n");
+}
+
+static int ftnandc021_command(struct ftnandc021_chip *priv, uint32_t cmd)
+{
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ int ret = 0;
+
+ priv->cmd_hc = cmd;
+
+ writel(ACR_START | ACR_CMD(cmd), ®s->acr);
+
+ /*
+ * pgread : (We have queued data at the IO port)
+ * pgwrite : (We have queued data at the IO port)
+ * bkerase : nand_wait + nand_ckst
+ * oobwr : nand_wait + nand_ckst
+ * otherwise : nand_wait
+ */
+ switch (cmd) {
+ case FTNANDC021_CMD_RDPG:
+ case FTNANDC021_CMD_WRPG:
+ break;
+ case FTNANDC021_CMD_ERBLK:
+ case FTNANDC021_CMD_WROOB:
+ ret = ftnandc021_wait(priv) || ftnandc021_ckst(priv);
+ break;
+ default:
+ ret = ftnandc021_wait(priv);
+ }
+
+ return ret;
+}
+
+static int ftnandc021_reset(struct nand_chip *chip)
+{
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ uint32_t ts, bk, pg, ac, mask;
+#ifdef CONFIG_SYS_FTNANDC021_TIMING
+ uint32_t timing[] = CONFIG_SYS_FTNANDC021_TIMING;
+
+ writel(timing[0], ®s->atr[0]);
+ writel(timing[1], ®s->atr[1]);
+#endif
+
+ writel(0, ®s->ier);
+ writel(0, ®s->pir);
+ writel(0xff, ®s->bbiwr);
+ writel(0xffffffff, ®s->lsnwr);
+ writel(0xffffffff, ®s->crcwr);
+
+ if (chip->options & NAND_BUSWIDTH_16)
+ writel(FCR_SWCRC | FCR_IGNCRC | FCR_16BIT, ®s->fcr);
+ else
+ writel(FCR_SWCRC | FCR_IGNCRC, ®s->fcr);
+
+ /* chip reset */
+ mask = SRR_CHIP_RESET | SRR_ECC_EN;
+ writel(mask, ®s->srr);
+ for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
+ if (readl(®s->srr) & SRR_CHIP_RESET)
+ continue;
+ break;
+ }
+ if (readl(®s->srr) & SRR_CHIP_RESET) {
+ printf("ftnandc021: reset failed\n");
+ return -ENXIO;
+ }
+
+ /* sanity check on page size */
+ if (priv->pgsz != 512 && priv->pgsz != 2048 && priv->pgsz != 4096) {
+ printf("ftnandc021: invalid page size=%d\n", priv->pgsz);
+ return -EINVAL;
+ }
+
+ bk = ffs(priv->bksz / priv->pgsz) - 5;
+ pg = (priv->pgsz < 2048) ? 0 : (ffs(priv->pgsz) - 11);
+ ac = priv->alen - 3;
+
+ writel(MCR_ME(0) | MCR_32GB | (bk << 16) | (pg << 8) | (ac << 10),
+ ®s->mcr);
+
+ /* IO mode = PIO */
+ writel(0, ®s->bcr);
+
+ /* ECC mode */
+ chip->ecc.layout = ftnandc021_ecclayout + pg;
+ chip->ecc.size = priv->pgsz;
+ chip->ecc.steps = 1;
+ chip->ecc.read_page = ftnandc021_read_page;
+ chip->ecc.write_page = ftnandc021_write_page;
+ chip->ecc.read_page_raw = ftnandc021_read_page_raw;
+ chip->ecc.write_page_raw = ftnandc021_write_page_raw;
+ chip->ecc.mode = NAND_ECC_HW;
+
+ /* reset the attached flash */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RESET))
+ return -ENXIO;
+
+ return 0;
+}
+
+/*
+ * Check hardware register for wait status. Returns 1 if device is ready,
+ * 0 if it is still busy.
+ */
+static int ftnandc021_dev_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ int ret = 1;
+
+ if (ftnandc021_wait(priv))
+ ret = 0;
+ else if (!(readl(®s->sr) & SR_READY))
+ ret = 0;
+
+ return ret;
+}
+
+static int ftnandc021_pio_wait(struct ftnandc021_chip *priv)
+{
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ int ret = -ETIMEDOUT;
+ uint32_t ts;
+
+ for (ts = get_timer(0); get_timer(ts) < CFG_PIO_TIMEOUT; ) {
+ if (!(readl(®s->ior) & IOR_READY))
+ continue;
+ ret = 0;
+ break;
+ }
+
+ if (ret)
+ printf("ftnandc021: pio timeout\n");
+
+ return ret;
+}
+
+static void ftnandc021_read_oob(struct mtd_info *mtd,
+ uint8_t *buf, int len)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ uint32_t tmp;
+
+ memset(buf, 0xff, len);
+
+ /* bad block */
+ buf[chip->badblockpos] = readl(®s->bbird) & 0xff;
+
+ /* data */
+ tmp = readl(®s->crcrd);
+ buf[8] = (tmp >> 0) & 0xff;
+ buf[9] = (tmp >> 8) & 0xff;
+ if (mtd->writesize >= 4096) {
+ buf[12] = (tmp >> 16) & 0xff;
+ buf[13] = (tmp >> 24) & 0xff;
+ }
+
+ tmp = readl(®s->lsnrd);
+ buf[10] = (tmp >> 0) & 0xff;
+ buf[11] = (tmp >> 8) & 0xff;
+ if (mtd->writesize >= 4096) {
+ buf[14] = (tmp >> 16) & 0xff;
+ buf[15] = (tmp >> 24) & 0xff;
+ }
+}
+
+static void ftnandc021_write_oob(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ uint32_t tmp;
+
+ /* bad block */
+ tmp = buf[chip->badblockpos];
+ writel(tmp, ®s->bbiwr);
+
+ /* mark it as 'not blank' */
+ tmp = 'W' | (buf[9] << 8);
+ if (mtd->writesize >= 4096)
+ tmp |= (buf[12] << 16) | (buf[13] << 24);
+ writel(tmp, ®s->crcwr);
+
+ tmp = buf[10] | (buf[11] << 8);
+ if (mtd->writesize >= 4096)
+ tmp |= (buf[14] << 16) | (buf[15] << 24);
+ writel(tmp, ®s->lsnwr);
+}
+
+static uint8_t ftnandc021_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ uint8_t ret = 0xff;
+
+ switch (priv->cmd) {
+ case NAND_CMD_READID:
+ if (priv->col < 8) {
+ uint32_t idx = priv->col >> 2;
+ uint32_t pos = priv->col & 0x3;
+ uint32_t tmp = readl(®s->idr[idx]);
+
+ ret = (uint8_t)(tmp >> (pos << 3));
+ priv->col += 1;
+ }
+ break;
+ case NAND_CMD_STATUS:
+ ret = (uint8_t)(readl(®s->idr[1]) & 0xff);
+ break;
+ default:
+ printf("ftnandc021: unknown cmd=0x%x in read_byte\n",
+ priv->cmd);
+ break;
+ }
+
+ return ret;
+}
+
+static uint16_t ftnandc021_read_word(struct mtd_info *mtd)
+{
+ uint16_t ret = 0xffff;
+ uint8_t *buf = (uint8_t *)&ret;
+
+ /* LSB format */
+ buf[0] = ftnandc021_read_byte(mtd);
+ buf[1] = ftnandc021_read_byte(mtd);
+
+ return ret;
+}
+
+/**
+ * Read data from NAND controller into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ */
+static void ftnandc021_read_buf(struct mtd_info *mtd,
+ uint8_t *buf, int len)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ int off;
+
+ if (priv->col >= mtd->writesize)
+ return;
+
+ if (priv->cmd == NAND_CMD_READOOB)
+ BUG(); /* should never happen */
+
+ /* skip if it's a blank page */
+ if (chip->oob_poi[8] != 'W') {
+ memset(buf, 0xff, len);
+ return;
+ }
+
+ off = 0;
+ while (off < len && priv->col < mtd->writesize) {
+ ftnandc021_pio_wait(priv);
+ *(uint32_t *)(buf + off) = readl(®s->dr);
+ priv->col += 4;
+ off += 4;
+ }
+
+ ftnandc021_wait(priv);
+}
+
+/**
+ * Write buffer to NAND controller
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ */
+static void ftnandc021_write_buf(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+ int off;
+
+ /*
+ * FTNANDC021 HW design issues:
+ *
+ * 1. OOB data must be set before issuing write command,
+ * so it's too late to do it right here
+ * 2. Only after command issued, the data register
+ * could accept data.
+ */
+ if (priv->col >= mtd->writesize)
+ return;
+
+ for (off = 0; off < len && priv->col < mtd->writesize; ) {
+ ftnandc021_pio_wait(priv);
+ writel(*(uint32_t *)(buf + off), ®s->dr);
+ priv->col += 4;
+ off += 4;
+ }
+
+ ftnandc021_wait(priv);
+}
+
+/**
+ * Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ */
+static int ftnandc021_verify_buf(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ int ret = 0;
+ uint8_t *tmp;
+
+ len = min_t(int, len, mtd->writesize);
+ tmp = malloc(mtd->writesize);
+
+ if (!tmp) {
+ printf("ftnandc021: out of memory\n");
+ return -ENOMEM;
+ } else {
+ ftnandc021_read_buf(mtd, tmp, len);
+ if (memcmp(tmp, buf, len))
+ ret = -EINVAL;
+ }
+
+ free(tmp);
+ return ret;
+}
+
+static void ftnandc021_cmdfunc(struct mtd_info *mtd,
+ unsigned cmd, int col, int page)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs __iomem *regs = priv->regs;
+
+ priv->cmd = cmd;
+ priv->col = col;
+ priv->page = page;
+
+ switch (cmd) {
+ case NAND_CMD_READID: /* 0x90 */
+ priv->col = 0;
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDID))
+ printf("ftnandc021: RDID failed.\n");
+ break;
+
+ case NAND_CMD_READOOB: /* 0x50 */
+ priv->col = mtd->writesize;
+ /* fall-through */
+ case NAND_CMD_READ0: /* 0x00 */
+ writel(page, ®s->pir);
+ writel(1, ®s->pcr);
+ /* fetch oob to check if it's a blank page */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDOOB)) {
+ printf("ftnandc021: RDOOB failed.\n");
+ break;
+ }
+ ftnandc021_read_oob(mtd, chip->oob_poi, mtd->oobsize);
+ /* skip if we don't need page data */
+ if (priv->col >= mtd->writesize)
+ break;
+ /* skip if it's a blank page */
+ if (chip->oob_poi[8] != 'W') {
+ debug("ftnandc021: skip page %d\n", page);
+ break;
+ }
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDPG))
+ printf("ftnandc021: RDPG failed.\n");
+ break;
+
+ case NAND_CMD_ERASE1: /* 0x60 */
+ writel(page, ®s->pir);
+ writel(1, ®s->pcr);
+ break;
+
+ case NAND_CMD_ERASE2: /* 0xD0 */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_ERBLK))
+ printf("ftnandc021: ERBLK failed\n");
+ break;
+
+ case NAND_CMD_STATUS: /* 0x70 */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDST))
+ printf("ftnandc021: RDST failed\n");
+ break;
+
+ case NAND_CMD_SEQIN: /* 0x80 (Write Stage 1.) */
+ writel(page, ®s->pir);
+ writel(1, ®s->pcr);
+ /* OOB data must be set before issuing command */
+ ftnandc021_write_oob(mtd, chip->oob_poi, mtd->oobsize);
+ priv->cmd_hc = (priv->col >= mtd->writesize)
+ ? FTNANDC021_CMD_WROOB : FTNANDC021_CMD_WRPG;
+ if (ftnandc021_command(priv, priv->cmd_hc))
+ printf("ftnandc021: CMD_HC=%d failed\n", priv->cmd_hc);
+ break;
+
+ case NAND_CMD_PAGEPROG: /* 0x10 (Write Stage 2.) */
+ /* nothing needs to be done */
+ break;
+
+ case NAND_CMD_RESET: /* 0xFF */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RESET))
+ printf("ftnandc021: RESET failed.\n");
+ break;
+
+ default:
+ printf("ftnandc021: unknown cmd=0x%x\n", cmd);
+ }
+}
+
+/**
+ * hardware specific access to control-lines
+ * @mtd: MTD device structure
+ * @cmd: command to device
+ * @ctrl:
+ * NAND_NCE: bit 0 -> don't care
+ * NAND_CLE: bit 1 -> Command Latch
+ * NAND_ALE: bit 2 -> Address Latch
+ *
+ * NOTE: boards may use different bits for these!!
+ */
+static void ftnandc021_hwcontrol(struct mtd_info *mtd,
+ int cmd, unsigned int ctrl)
+{
+ /* nothing needs to be done */
+}
+
+int ftnandc021_init(struct nand_chip *chip, uint32_t iobase, int alen)
+{
+ struct ftnandc021_chip *priv;
+
+ priv = calloc(1, sizeof(struct ftnandc021_chip));
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regs = (void __iomem *)iobase;
+ priv->pgsz = 1 << chip->page_shift;
+ priv->bksz = 1 << chip->phys_erase_shift;
+ priv->alen = alen;
+
+ chip->priv = priv;
+
+ debug("ftnandc021: pg=%dK, bk=%dK, alen=%d\n",
+ priv->pgsz, priv->bksz, priv->alen);
+
+ /* hardware reset */
+ if (ftnandc021_reset(chip))
+ return -EINVAL;
+
+ /* hwcontrol always must be implemented */
+ chip->cmd_ctrl = ftnandc021_hwcontrol;
+ chip->cmdfunc = ftnandc021_cmdfunc;
+ chip->dev_ready = ftnandc021_dev_ready;
+ chip->chip_delay = 0;
+
+ chip->read_byte = ftnandc021_read_byte;
+ chip->read_word = ftnandc021_read_word;
+ chip->read_buf = ftnandc021_read_buf;
+ chip->write_buf = ftnandc021_write_buf;
+ chip->verify_buf = ftnandc021_verify_buf;
+
+ return 0;
+}
diff --git a/include/faraday/ftnandc021.h b/include/faraday/ftnandc021.h
new file mode 100644
index 0000000..c70e91e
--- /dev/null
+++ b/include/faraday/ftnandc021.h
@@ -0,0 +1,146 @@
+/*
+ * Faraday NAND Flash Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dant...@faraday-tech.com>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+ */
+
+#ifndef __FTNANDC021_H
+#define __FTNANDC021_H
+
+/* NANDC control registers */
+struct ftnandc021_regs {
+ /* 0x000 ~ 0x0fc */
+ uint32_t ecc_pr[4];/* ECC Parity Register */
+ uint32_t ecc_sr; /* ECC Status Register */
+ uint32_t rsvd0[59];
+
+ /* 0x100 ~ 0x1fc */
+ uint32_t sr; /* Status Register */
+ uint32_t acr; /* Access Control Register */
+ uint32_t fcr; /* Flow Control Register */
+ uint32_t pir; /* Page Index Register */
+ uint32_t mcr; /* Memory Configuration Register */
+ uint32_t atr[2]; /* AC Timing Register */
+ uint32_t rsvd1[1];
+ uint32_t idr[2]; /* Device ID Register */
+ uint32_t ier; /* Interrupt Enable Register */
+ uint32_t iscr; /* Interrupt Status Clear Register */
+ uint32_t rsvd2[4];
+ uint32_t bbiwr; /* Bad Block Info Write */
+ uint32_t lsn; /* LSN Initialize */
+ uint32_t crcwr; /* LSN CRC Write */
+ uint32_t lsnwr; /* LSN Write */
+ uint32_t bbird; /* Bad Block Info Read */
+ uint32_t lsnrd; /* LSN Read */
+ uint32_t crcrd; /* CRC Read */
+ uint32_t rsvd3[41];
+
+ /* 0x200 ~ 0x2fc */
+ uint32_t rsvd4[1];
+ uint32_t icr; /* BMC Interrupt Control Register */
+ uint32_t ior; /* BMC PIO Status Register */
+ uint32_t bcr; /* BMC Burst Control Register */
+ uint32_t rsvd5[60];
+
+ /* 0x300 ~ 0x3fc */
+ uint32_t dr; /* MLC Data Register */
+ uint32_t isr; /* MLC Interrupt Status Register */
+ uint32_t pcr; /* Page Count Register */
+ uint32_t srr; /* MLC Software Reset Register */
+ uint32_t rsvd7[58];
+ uint32_t revr; /* Revision Register */
+ uint32_t cfgr; /* Configuration Register */
+};
+
+/* ECC Status Register */
+#define ECC_SR_CERR (1 << 3) /* correction error */
+#define ECC_SR_ERR (1 << 2) /* ecc error */
+#define ECC_SR_DEC (1 << 1) /* ecc decode finished */
+#define ECC_SR_ENC (1 << 0) /* ecc encode finished */
+
+/* Status Register */
+#define SR_BLANK (1 << 7) /* blanking check failed */
+#define SR_ECC (1 << 6) /* ecc timeout */
+#define SR_STS (1 << 4) /* status error */
+#define SR_CRC (1 << 3) /* crc error */
+#define SR_CMD (1 << 2) /* command finished */
+#define SR_READY (1 << 1) /* chip ready/busy */
+#define SR_ENA (1 << 0) /* chip enabled */
+
+/* Access Control Register */
+#define ACR_CMD(x) (((x) & 0x1f) << 8) /* command code */
+#define ACR_START (1 << 7) /* command start */
+
+/* Flow Control Register */
+#define FCR_SWCRC (1 << 8) /* CRC controlled by Software */
+#define FCR_IGNCRC (1 << 7) /* Bypass/Ignore CRC checking */
+#define FCR_16BIT (1 << 4) /* 16 bit data bus */
+#define FCR_WPROT (1 << 3) /* write protected */
+#define FCR_NOSC (1 << 2) /* bypass status check error */
+#define FCR_MICRON (1 << 1) /* Micron 2-plane command */
+#define FCR_NOBC (1 << 0) /* skip blanking check error */
+
+/* Interrupt Enable Register */
+#define IER_ENA (1 << 7) /* interrupt enabled */
+#define IER_ECC (1 << 3) /* ecc error timeout */
+#define IER_STS (1 << 2) /* status error */
+#define IER_CRC (1 << 1) /* crc error */
+#define IER_CMD (1 << 0) /* command finished */
+
+/* BMC PIO Status Register */
+#define IOR_READY (1 << 0) /* PIO ready */
+
+/* MLC Software Reset Register */
+#define SRR_ECC_EN (1 << 8) /* ECC enabled */
+#define SRR_NANDC_RESET (1 << 2) /* NANDC reset */
+#define SRR_BMC_RESET (1 << 1) /* BMC reset */
+#define SRR_ECC_RESET (1 << 0) /* ECC reset */
+#define SRR_CHIP_RESET (SRR_NANDC_RESET | SRR_BMC_RESET | SRR_ECC_RESET)
+
+/* Memory Configuration Register */
+#define MCR_BS16P (0 << 16) /* page count per block */
+#define MCR_BS32P (1 << 16)
+#define MCR_BS64P (2 << 16)
+#define MCR_BS128P (3 << 16)
+#define MCR_1PLANE (0 << 14) /* memory architecture */
+#define MCR_2PLANE (1 << 14)
+#define MCR_SERIAL (0 << 12) /* interleaving: off, 2 flash, 4 flash */
+#define MCR_IL2 (1 << 12)
+#define MCR_IL4 (2 << 12)
+#define MCR_ALEN3 (0 << 10) /* address length */
+#define MCR_ALEN4 (1 << 10)
+#define MCR_ALEN5 (2 << 10)
+#define MCR_PS512 (0 << 8) /* size per page (bytes) */
+#define MCR_PS2048 (1 << 8)
+#define MCR_PS4096 (2 << 8)
+#define MCR_16MB (0 << 4) /* flash size */
+#define MCR_32MB (1 << 4)
+#define MCR_64MB (2 << 4)
+#define MCR_128MB (3 << 4)
+#define MCR_256MB (4 << 4)
+#define MCR_512MB (5 << 4)
+#define MCR_1GB (6 << 4)
+#define MCR_2GB (7 << 4)
+#define MCR_4GB (8 << 4)
+#define MCR_8GB (9 << 4)
+#define MCR_16GB (10 << 4)
+#define MCR_32GB (11 << 4)
+#define MCR_ME(n) (1 << (n)) /* module enable, 0 <= n <= 3 */
+
+/* FTNANDC021 built-in command set */
+#define FTNANDC021_CMD_RDID 0x01 /* read id */
+#define FTNANDC021_CMD_RESET 0x02 /* reset flash */
+#define FTNANDC021_CMD_RDST 0x04 /* read status */
+#define FTNANDC021_CMD_RDPG 0x05 /* read page (data + oob) */
+#define FTNANDC021_CMD_RDOOB 0x06 /* read oob */
+#define FTNANDC021_CMD_WRPG 0x10 /* write page (data + oob) */
+#define FTNANDC021_CMD_ERBLK 0x11 /* erase block */
+#define FTNANDC021_CMD_WROOB 0x13 /* write oob */
+
+int ftnandc021_init(struct nand_chip *chip, uint32_t iobase, int alen);
+
+#endif /* EOF */
--
1.7.9.5
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