[U-Boot] [PATCH v2 07/12] mtd: nand: add Faraday FTNANDC021 NAND controller support

Kuo-Jung Su
2013-04-18T09:25:34Z

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 <dantesu@faraday-tech.com>
CC: Scott Wood <scottwood@freescale.com>
---
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/ftnandc021.c | 544 +++++++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/ftnandc021.h | 132 ++++++++++
include/faraday/nand.h | 16 ++
4 files changed, 693 insertions(+)
create mode 100644 drivers/mtd/nand/ftnandc021.c
create mode 100644 drivers/mtd/nand/ftnandc021.h
create mode 100644 include/faraday/nand.h

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..58863dc
--- /dev/null
+++ b/drivers/mtd/nand/ftnandc021.c
@@ -0,0 +1,544 @@
+/*
+ * Faraday NAND Flash Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@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/io.h>
+#include <asm/unaligned.h>
+#include <nand.h>
+#include <malloc.h>
+
+#include "ftnandc021.h"
+
+/* common bitmask of nand flash status register */
+#define NAND_IOSTATUS_ERROR BIT_MASK(0)
+#define NAND_IOSTATUS_READY BIT_MASK(6)
+#define NAND_IOSTATUS_UNPROTCT BIT_MASK(7)
+
+struct ftnandc021_chip {
+ void *iobase;
+ uint32_t cmd;
+
+ uint32_t pgidx;
+
+ uint32_t off;
+ uint8_t buf[256];
+
+ uint32_t adrc; /* address cycle */
+ uint32_t pgsz; /* page size */
+ uint32_t bksz; /* block size */
+};
+
+/* Register access macros */
+#define NAND_READ(r) le32_to_cpu(readl(r))
+#define NAND_WRITE(v, r) writel(cpu_to_le32(v), r)
+#define NAND_SETBITS(m, r) setbits_le32(r, m)
+#define NAND_CLRBITS(m, r) clrbits_le32(r, m)
+
+static struct nand_ecclayout ftnandc021_oob_2k = {
+ .eccbytes = 24,
+ .eccpos = {
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63
+ },
+ .oobfree = {
+ {
+ .offset = 9,
+ .length = 3
+ }
+ }
+};
+
+static int
+ftnandc021_reset(struct nand_chip *chip)
+{
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs *regs = priv->iobase;
+ uint32_t bk = 2; /* 64 pages */
+ uint32_t pg = 1; /* 2k */
+ uint32_t ac = 2; /* 5 */
+
+#ifdef CONFIG_FTNANDC021_ACTIMING_1
+ NAND_WRITE(CONFIG_FTNANDC021_ACTIMING_1, &regs->atr[0]);
+#endif
+#ifdef CONFIG_FTNANDC021_ACTIMING_2
+ NAND_WRITE(CONFIG_FTNANDC021_ACTIMING_2, &regs->atr[1]);
+#endif
+
+ NAND_WRITE(0, &regs->ier);
+ NAND_WRITE(0, &regs->pir);
+ NAND_WRITE(0xff, &regs->bbiwr);
+ NAND_WRITE(0xffffffff, &regs->lsnwr);
+ NAND_WRITE(0xffffffff, &regs->crcwr);
+
+ if (chip->options & NAND_BUSWIDTH_16)
+ NAND_WRITE(FCR_SWCRC | FCR_IGNCRC | FCR_16BIT, &regs->fcr);
+ else
+ NAND_WRITE(FCR_SWCRC | FCR_IGNCRC, &regs->fcr);
+
+ /* chip reset */
+ NAND_WRITE(SRR_CHIP_RESET, &regs->srr);
+
+ /* wait until chip ready */
+ while (NAND_READ(&regs->srr) & SRR_CHIP_RESET)
+ ;
+
+ switch (priv->bksz / priv->pgsz) {
+ case 16:
+ bk = 0;
+ break;
+ case 32:
+ bk = 1;
+ break;
+ case 64:
+ bk = 2;
+ break;
+ case 128:
+ bk = 3;
+ break;
+ }
+
+ switch (priv->pgsz) {
+ case 512:
+ pg = 0;
+ break;
+ case 2048:
+ pg = 1;
+ break;
+ case 4096:
+ pg = 2;
+ break;
+ }
+
+ switch (priv->adrc) {
+ case 3:
+ ac = 0;
+ break;
+ case 4:
+ ac = 1;
+ break;
+ case 5:
+ ac = 2;
+ break;
+ }
+
+ NAND_WRITE(MCR_ME(0) | MCR_32GB | (bk << 16) | (pg << 8) | (ac << 10),
+ &regs->mcr);
+
+ /* PIO mode */
+ NAND_WRITE(0, &regs->ior);
+
+ return 0;
+}
+
+static inline int
+ftnandc021_ckst(struct ftnandc021_chip *priv)
+{
+ struct ftnandc021_regs *regs = priv->iobase;
+ uint32_t st = NAND_READ(&regs->idr[1]);
+
+ if (st & NAND_IOSTATUS_ERROR)
+ return -NAND_IOSTATUS_ERROR;
+
+ if (!(st & NAND_IOSTATUS_READY))
+ return -NAND_IOSTATUS_READY;
+
+ if (!(st & NAND_IOSTATUS_UNPROTCT))
+ return -NAND_IOSTATUS_UNPROTCT;
+
+ return 0;
+}
+
+static inline int
+ftnandc021_wait(struct ftnandc021_chip *priv)
+{
+ struct ftnandc021_regs *regs = priv->iobase;
+ ulong ts;
+ int rc = -1;
+
+ for (ts = get_timer(0); get_timer(ts) < 200; ) {
+ if (!(NAND_READ(&regs->acr) & ACR_START)) {
+ rc = 0;
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static int
+ftnandc021_command(struct ftnandc021_chip *priv, uint32_t cmd)
+{
+ struct ftnandc021_regs *regs = priv->iobase;
+ int ret = 0;
+
+ NAND_WRITE(ACR_START | ACR_CMD(cmd), &regs->acr);
+
+ /*
+ * pgread : (We have queued data at the IO port)
+ * pgwrite : nand_ckst (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:
+ break;
+ case FTNANDC021_CMD_WRPG:
+ ret = ftnandc021_ckst(priv);
+ break;
+ case FTNANDC021_CMD_ERBLK:
+ case FTNANDC021_CMD_WROOB:
+ ret = ftnandc021_wait(priv) || ftnandc021_ckst(priv);
+ break;
+ default:
+ ret = ftnandc021_wait(priv);
+ }
+
+ return ret;
+}
+
+/*
+ * 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;
+ int ret = 1;
+
+ if (ftnandc021_wait(priv) || ftnandc021_ckst(priv))
+ ret = 0;
+
+ 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 *regs = priv->iobase;
+ uint32_t tmp;
+
+ /*
+ * Bad Block Information:
+ * 1. Large Page(2048, 4096): off=0, len=2
+ * 2. Small Page(512): off=5, len=1
+ */
+ buf[0] = NAND_READ(&regs->bbird) & 0xFF;
+ buf[1] = 0xFF;
+
+ tmp = NAND_READ(&regs->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 = NAND_READ(&regs->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 *regs = priv->iobase;
+ uint32_t tmp;
+
+ tmp = buf[0];
+ NAND_WRITE(tmp, &regs->bbiwr);
+
+ tmp = buf[8] | (buf[9] << 8);
+ if (mtd->writesize >= 4096)
+ tmp |= (buf[12] << 16) | (buf[13] << 24);
+ NAND_WRITE(tmp, &regs->crcwr);
+
+ tmp = buf[10] | (buf[11] << 8);
+ if (mtd->writesize >= 4096)
+ tmp |= (buf[14] << 16) | (buf[15] << 24);
+ NAND_WRITE(tmp, &regs->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 *regs = priv->iobase;
+ uint8_t ret = 0xff;
+
+ switch (priv->cmd) {
+ case NAND_CMD_READID:
+ case NAND_CMD_READOOB:
+ ret = priv->buf[priv->off % 256];
+ priv->off += 1;
+ break;
+ case NAND_CMD_STATUS:
+ ret = (uint8_t)(NAND_READ(&regs->idr[1]) & 0xff);
+ break;
+ default:
+ debug("ftnandc021_read_byte: unknown cmd(0x%02X)\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;
+
+ 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 *regs = priv->iobase;
+ ulong off;
+
+ /* oob read */
+ if (len <= mtd->oobsize) {
+ ftnandc021_read_oob(mtd, buf, len);
+ return;
+ }
+
+ /* page read */
+ for (off = 0; len > 0; len -= 4, off += 4) {
+ while (!(NAND_READ(&regs->ior) & IOR_READY))
+ ;
+ *(uint32_t *)(buf + off) = NAND_READ(&regs->dr);
+ }
+
+ if (ftnandc021_wait(priv))
+ printf("ftnandc021_read_buf: cmd(0x%x) timeout\n", priv->cmd);
+}
+
+/**
+ * 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 *regs = priv->iobase;
+ ulong off;
+
+ /* 1. oob write */
+ if (len <= mtd->oobsize)
+ return;
+
+ /* 2. page write */
+ for (off = 0; len > 0; len -= 4, off += 4) {
+ while (!(NAND_READ(&regs->ior) & IOR_READY))
+ ;
+ NAND_WRITE(*(uint32_t *)(buf + off), &regs->dr);
+ }
+
+ /* 3. wait until command finish */
+ if (ftnandc021_wait(priv))
+ printf("ftnandc021_write_buf: write fail\n");
+}
+
+/**
+ * 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 rc = 0;
+ uint8_t *tmp;
+
+ len = min_t(int, len, mtd->writesize);
+ tmp = malloc(mtd->writesize);
+
+ if (!tmp) {
+ printf("ftnandc021_verify_buf: out of memory\n");
+ return -1;
+ } else {
+ ftnandc021_read_buf(mtd, tmp, len);
+ if (memcmp(tmp, buf, len))
+ rc = -2;
+ }
+
+ free(tmp);
+ return rc;
+}
+
+static void
+ftnandc021_cmdfunc(struct mtd_info *mtd, unsigned cmd, int column, int pgidx)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct ftnandc021_chip *priv = chip->priv;
+ struct ftnandc021_regs *regs = priv->iobase;
+
+ priv->cmd = cmd;
+ priv->pgidx = pgidx;
+
+ switch (cmd) {
+ case NAND_CMD_READID: /* 0x90 */
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDID)) {
+ printf("ftnandc021: RDID failed.\n");
+ } else {
+ put_unaligned_le32(NAND_READ(&regs->idr[0]),
+ priv->buf);
+ put_unaligned_le32(NAND_READ(&regs->idr[1]),
+ priv->buf + 4);
+ priv->off = 0;
+ }
+ break;
+
+ case NAND_CMD_READ0: /* 0x00 */
+ NAND_WRITE(pgidx, &regs->pir);
+ NAND_WRITE(1, &regs->pcr);
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDPG))
+ printf("ftnandc021: RDPG failed.\n");
+ break;
+
+ case NAND_CMD_READOOB: /* 0x50 */
+ NAND_WRITE(pgidx, &regs->pir);
+ NAND_WRITE(1, &regs->pcr);
+ if (ftnandc021_command(priv, FTNANDC021_CMD_RDOOB)) {
+ printf("ftnandc021: RDOOB failed.\n");
+ } else {
+ ftnandc021_read_oob(mtd, priv->buf, mtd->oobsize);
+ priv->off = 0;
+ }
+ break;
+
+ case NAND_CMD_ERASE1: /* 0x60 */
+ NAND_WRITE(pgidx, &regs->pir);
+ NAND_WRITE(1, &regs->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.) */
+ NAND_WRITE(pgidx, &regs->pir);
+ NAND_WRITE(1, &regs->pcr);
+
+ ftnandc021_write_oob(mtd, chip->oob_poi, mtd->writesize);
+ if (column >= mtd->writesize) {
+ if (ftnandc021_command(priv, FTNANDC021_CMD_WROOB))
+ printf("ftnandc021: WROOB failed\n");
+ } else {
+ if (ftnandc021_command(priv, FTNANDC021_CMD_WRPG))
+ printf("ftnandc021: WRPG failed\n");
+ }
+ break;
+
+ case NAND_CMD_PAGEPROG: /* 0x10 (Write Stage 2.) */
+ 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)
+{
+}
+
+int
+ftnandc021_probe(struct nand_chip *chip)
+{
+ struct ftnandc021_chip *priv;
+
+ priv = malloc(sizeof(struct ftnandc021_chip));
+ if (!priv)
+ return -1;
+
+ memset(priv, 0, sizeof(*priv));
+ priv->iobase = (void *)CONFIG_NAND_FTNANDC021_BASE;
+ priv->adrc = (unsigned int)chip->priv;
+ priv->pgsz = 1 << chip->page_shift;
+ priv->bksz = 1 << chip->phys_erase_shift;
+
+ chip->priv = priv;
+ 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;
+
+ chip->ecc.mode = NAND_ECC_NONE;
+ chip->ecc.layout = &ftnandc021_oob_2k;
+
+ chip->options |= NAND_NO_AUTOINCR;
+
+ ftnandc021_reset(chip);
+
+ debug("ftnandc021: pg=%dK, bk=%dK, adrc=%d\n",
+ priv->pgsz >> 10, priv->bksz >> 10, priv->adrc);
+
+ return 0;
+}
diff --git a/drivers/mtd/nand/ftnandc021.h b/drivers/mtd/nand/ftnandc021.h
new file mode 100644
index 0000000..b8274c8
--- /dev/null
+++ b/drivers/mtd/nand/ftnandc021.h
@@ -0,0 +1,132 @@
+/*
+ * Faraday NAND Flash Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@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 lsnwr; /* LSN Write */
+ uint32_t crcwr; /* LSN CRC Write */
+ uint32_t lsni; /* LSN Initialize */
+ 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 */
+};
+
+/* bit mask */
+#define SR_BLANK BIT_MASK(7) /* blanking check failed */
+#define SR_ECC BIT_MASK(6) /* ecc failed */
+#define SR_STS BIT_MASK(4) /* status error */
+#define SR_CRC BIT_MASK(3) /* crc error */
+#define SR_CMD BIT_MASK(2) /* command finished */
+#define SR_BUSY BIT_MASK(1) /* chip busy */
+#define SR_ENA BIT_MASK(0) /* chip enabled */
+
+#define ACR_CMD(x) (((x) & 0x1f) << 8) /* command code */
+#define ACR_START BIT_MASK(7) /* command start */
+
+#define FCR_SWCRC BIT_MASK(8) /* CRC controlled by Software */
+#define FCR_IGNCRC BIT_MASK(7) /* Bypass/Ignore CRC checking */
+#define FCR_16BIT BIT_MASK(4) /* 16 bit data bus */
+#define FCR_WPROT BIT_MASK(3) /* write protected */
+#define FCR_NOSC BIT_MASK(2) /* bypass status check error */
+#define FCR_MICRON BIT_MASK(1) /* Micron 2-plane command */
+#define FCR_NOBC BIT_MASK(0) /* skip blanking check error */
+
+#define IER_ENA BIT_MASK(7) /* interrupt enabled */
+#define IER_ECC BIT_MASK(3) /* ecc error timeout */
+#define IER_STS BIT_MASK(2) /* status error */
+#define IER_CRC BIT_MASK(1) /* crc error */
+#define IER_CMD BIT_MASK(0) /* command finished */
+
+#define IOR_READY BIT_MASK(0) /* PIO ready */
+
+#define SRR_ECC_ENABLED BIT_MASK(8) /* ECC enabled */
+#define SRR_NANDC_RESET BIT_MASK(2) /* NANDC reset */
+#define SRR_BMC_RESET BIT_MASK(1) /* BMC reset */
+#define SRR_ECC_RESET BIT_MASK(0) /* ECC reset */
+#define SRR_CHIP_RESET (SRR_NANDC_RESET | SRR_BMC_RESET | SRR_ECC_RESET)
+
+#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 integrated command set */
+#define FTNANDC021_CMD_RDID 0x01 /* read id */
+#define FTNANDC021_CMD_RESET 0x02
+#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 */
+
+#endif
diff --git a/include/faraday/nand.h b/include/faraday/nand.h
new file mode 100644
index 0000000..6d8efb2
--- /dev/null
+++ b/include/faraday/nand.h
@@ -0,0 +1,16 @@
+/*
+ * Faraday NAND Flash Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@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 _FARADAY_NAND_H
+#define _FARADAY_NAND_H
+
+int ftnandc021_probe(struct nand_chip *chip);
+
+#endif /* _FARADAY_NAND_H */
--
1.7.9.5