nand: Merge changes from Linux nand driver

[backport from linux commit 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe]

This patch synchronizes the nand driver with the Linux 3.0 state.

Signed-off-by: Christian Hitz <christian.hitz@aizo.com>
Cc: Scott Wood <scottwood@freescale.com>
[scottwood@freescale.com: minor fixes]
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 309 insertions, 150 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 758b53fa29f..ed2640c3ef0 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -115,6 +115,35 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
 
 static int nand_wait(struct mtd_info *mtd, struct nand_chip *this);
 
+static int check_offs_len(struct mtd_info *mtd,
+					loff_t ofs, uint64_t len)
+{
+	struct nand_chip *chip = mtd->priv;
+	int ret = 0;
+
+	/* Start address must align on block boundary */
+	if (ofs & ((1 << chip->phys_erase_shift) - 1)) {
+		MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Unaligned address\n", __func__);
+		ret = -EINVAL;
+	}
+
+	/* Length must align on block boundary */
+	if (len & ((1 << chip->phys_erase_shift) - 1)) {
+		MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Length not block aligned\n",
+					__func__);
+		ret = -EINVAL;
+	}
+
+	/* Do not allow past end of device */
+	if (ofs + len > mtd->size) {
+		MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Past end of device\n",
+					__func__);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
 /**
  * nand_release_device - [GENERIC] release chip
  * @mtd:	MTD device structure
@@ -123,8 +152,10 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this);
  */
 static void nand_release_device(struct mtd_info *mtd)
 {
-	struct nand_chip *this = mtd->priv;
-	this->select_chip(mtd, -1);	/* De-select the NAND device */
+	struct nand_chip *chip = mtd->priv;
+
+	/* De-select the NAND device */
+	chip->select_chip(mtd, -1);
 }
 
 /**
@@ -316,6 +347,9 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
 	struct nand_chip *chip = mtd->priv;
 	u16 bad;
 
+	if (chip->options & NAND_BBT_SCANLASTPAGE)
+		ofs += mtd->erasesize - mtd->writesize;
+
 	page = (int)(ofs >> chip->page_shift) & chip->pagemask;
 
 	if (getchip) {
@@ -333,14 +367,18 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
 		bad = cpu_to_le16(chip->read_word(mtd));
 		if (chip->badblockpos & 0x1)
 			bad >>= 8;
-		if ((bad & 0xFF) != 0xff)
-			res = 1;
+		else
+			bad &= 0xFF;
 	} else {
 		chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page);
-		if (chip->read_byte(mtd) != 0xff)
-			res = 1;
+		bad = chip->read_byte(mtd);
 	}
 
+	if (likely(chip->badblockbits == 8))
+		res = bad != 0xFF;
+	else
+		res = hweight8(bad) < chip->badblockbits;
+
 	if (getchip)
 		nand_release_device(mtd);
 
@@ -359,7 +397,10 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
 {
 	struct nand_chip *chip = mtd->priv;
 	uint8_t buf[2] = { 0, 0 };
-	int block, ret;
+	int block, ret, i = 0;
+
+	if (chip->options & NAND_BBT_SCANLASTPAGE)
+		ofs += mtd->erasesize - mtd->writesize;
 
 	/* Get block number */
 	block = (int)(ofs >> chip->bbt_erase_shift);
@@ -370,17 +411,31 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
 	if (chip->options & NAND_USE_FLASH_BBT)
 		ret = nand_update_bbt(mtd, ofs);
 	else {
-		/* We write two bytes, so we dont have to mess with 16 bit
-		 * access
-		 */
 		nand_get_device(chip, mtd, FL_WRITING);
-		ofs += mtd->oobsize;
-		chip->ops.len = chip->ops.ooblen = 2;
-		chip->ops.datbuf = NULL;
-		chip->ops.oobbuf = buf;
-		chip->ops.ooboffs = chip->badblockpos & ~0x01;
 
-		ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+		/* Write to first two pages and to byte 1 and 6 if necessary.
+		 * If we write to more than one location, the first error
+		 * encountered quits the procedure. We write two bytes per
+		 * location, so we dont have to mess with 16 bit access.
+		 */
+		do {
+			chip->ops.len = chip->ops.ooblen = 2;
+			chip->ops.datbuf = NULL;
+			chip->ops.oobbuf = buf;
+			chip->ops.ooboffs = chip->badblockpos & ~0x01;
+
+			ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+
+			if (!ret && (chip->options & NAND_BBT_SCANBYTE1AND6)) {
+				chip->ops.ooboffs = NAND_SMALL_BADBLOCK_POS
+					& ~0x01;
+				ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+			}
+			i++;
+			ofs += mtd->writesize;
+		} while (!ret && (chip->options & NAND_BBT_SCAN2NDPAGE) &&
+				i < 2);
+
 		nand_release_device(mtd);
 	}
 	if (!ret)
@@ -399,6 +454,11 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
 static int nand_check_wp(struct mtd_info *mtd)
 {
 	struct nand_chip *chip = mtd->priv;
+
+	/* broken xD cards report WP despite being writable */
+	if (chip->options & NAND_BROKEN_XD)
+		return 0;
+
 	/* Check the WP bit */
 	chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 	return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
@@ -419,11 +479,6 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
 {
 	struct nand_chip *chip = mtd->priv;
 
-	if (!(chip->options & NAND_BBT_SCANNED)) {
-		chip->options |= NAND_BBT_SCANNED;
-		chip->scan_bbt(mtd);
-	}
-
 	if (!chip->bbt)
 		return chip->block_bad(mtd, ofs, getchip);
 
@@ -686,9 +741,10 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
  *
  * Get the device and lock it for exclusive access
  */
-static int nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state)
+static int
+nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
 {
-	this->state = new_state;
+	chip->state = new_state;
 	return 0;
 }
 
@@ -701,10 +757,10 @@ static int nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int ne
  * Erase can take up to 400ms and program up to 20ms according to
  * general NAND and SmartMedia specs
  */
-static int nand_wait(struct mtd_info *mtd, struct nand_chip *this)
+static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
 {
 	unsigned long	timeo;
-	int state = this->state;
+	int state = chip->state;
 	u32 time_start;
 
 	if (state == FL_ERASING)
@@ -712,10 +768,10 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this)
 	else
 		timeo = (CONFIG_SYS_HZ * 20) / 1000;
 
-	if ((state == FL_ERASING) && (this->options & NAND_IS_AND))
-		this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
+	if ((state == FL_ERASING) && (chip->options & NAND_IS_AND))
+		chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
 	else
-		this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
+		chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 
 	time_start = get_timer(0);
 
@@ -725,11 +781,11 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this)
 			return 0x01;
 		}
 
-		if (this->dev_ready) {
-			if (this->dev_ready(mtd))
+		if (chip->dev_ready) {
+			if (chip->dev_ready(mtd))
 				break;
 		} else {
-			if (this->read_byte(mtd) & NAND_STATUS_READY)
+			if (chip->read_byte(mtd) & NAND_STATUS_READY)
 				break;
 		}
 	}
@@ -739,7 +795,7 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this)
 		;
 #endif /*  PPCHAMELON_NAND_TIMER_HACK */
 
-	return this->read_byte(mtd);
+	return (int)chip->read_byte(mtd);
 }
 
 /**
@@ -860,6 +916,7 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
 	int data_col_addr, i, gaps = 0;
 	int datafrag_len, eccfrag_len, aligned_len, aligned_pos;
 	int busw = (chip->options & NAND_BUSWIDTH_16) ? 2 : 1;
+	int index = 0;
 
 	/* Column address wihin the page aligned to ECC size (256bytes). */
 	start_step = data_offs / chip->ecc.size;
@@ -898,26 +955,30 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
 	} else {
 		/* send the command to read the particular ecc bytes */
 		/* take care about buswidth alignment in read_buf */
-		aligned_pos = eccpos[start_step * chip->ecc.bytes] & ~(busw - 1);
+		index = start_step * chip->ecc.bytes;
+
+		aligned_pos = eccpos[index] & ~(busw - 1);
 		aligned_len = eccfrag_len;
-		if (eccpos[start_step * chip->ecc.bytes] & (busw - 1))
+		if (eccpos[index] & (busw - 1))
 			aligned_len++;
-		if (eccpos[(start_step + num_steps) * chip->ecc.bytes] & (busw - 1))
+		if (eccpos[index + (num_steps * chip->ecc.bytes)] & (busw - 1))
 			aligned_len++;
 
-		chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize + aligned_pos, -1);
+		chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
+					mtd->writesize + aligned_pos, -1);
 		chip->read_buf(mtd, &chip->oob_poi[aligned_pos], aligned_len);
 	}
 
 	for (i = 0; i < eccfrag_len; i++)
-		chip->buffers->ecccode[i] = chip->oob_poi[eccpos[i + start_step * chip->ecc.bytes]];
+		chip->buffers->ecccode[i] = chip->oob_poi[eccpos[i + index]];
 
 	p = bufpoi + data_col_addr;
 	for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) {
 		int stat;
 
-		stat = chip->ecc.correct(mtd, p, &chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]);
-		if (stat == -1)
+		stat = chip->ecc.correct(mtd, p,
+			&chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]);
+		if (stat < 0)
 			mtd->ecc_stats.failed++;
 		else
 			mtd->ecc_stats.corrected += stat;
@@ -1142,6 +1203,9 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 	int ret = 0;
 	uint32_t readlen = ops->len;
 	uint32_t oobreadlen = ops->ooblen;
+	uint32_t max_oobsize = ops->mode == MTD_OOB_AUTO ?
+		mtd->oobavail : mtd->oobsize;
+
 	uint8_t *bufpoi, *oob, *buf;
 
 	stats = mtd->ecc_stats;
@@ -1187,7 +1251,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 
 			/* Transfer not aligned data */
 			if (!aligned) {
-				if (!NAND_SUBPAGE_READ(chip) && !oob)
+				if (!NAND_SUBPAGE_READ(chip) && !oob &&
+				    !(mtd->ecc_stats.failed - stats.failed))
 					chip->pagebuf = realpage;
 				memcpy(buf, chip->buffers->databuf + col, bytes);
 			}
@@ -1195,18 +1260,14 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 			buf += bytes;
 
 			if (unlikely(oob)) {
-				/* Raw mode does data:oob:data:oob */
-				if (ops->mode != MTD_OOB_RAW) {
-					int toread = min(oobreadlen,
-						chip->ecc.layout->oobavail);
-					if (toread) {
-						oob = nand_transfer_oob(chip,
-							oob, ops, toread);
-						oobreadlen -= toread;
-					}
-				} else
-					buf = nand_transfer_oob(chip,
-						buf, ops, mtd->oobsize);
+
+				int toread = min(oobreadlen, max_oobsize);
+
+				if (toread) {
+					oob = nand_transfer_oob(chip,
+						oob, ops, toread);
+					oobreadlen -= toread;
+				}
 			}
 
 			if (!(chip->options & NAND_NO_READRDY)) {
@@ -1793,13 +1854,12 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
  * nand_fill_oob - [Internal] Transfer client buffer to oob
  * @chip:	nand chip structure
  * @oob:	oob data buffer
+ * @len:	oob data write length
  * @ops:	oob ops structure
  */
-static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
-				  struct mtd_oob_ops *ops)
+static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, size_t len,
+						struct mtd_oob_ops *ops)
 {
-	size_t len = ops->ooblen;
-
 	switch (ops->mode) {
 
 	case MTD_OOB_PLACE:
@@ -1838,7 +1898,7 @@ static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
 	return NULL;
 }
 
-#define NOTALIGNED(x)	(x & (chip->subpagesize - 1)) != 0
+#define NOTALIGNED(x)	((x & (chip->subpagesize - 1)) != 0)
 
 /**
  * nand_do_write_ops - [Internal] NAND write with ECC
@@ -1854,6 +1914,11 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
 	int chipnr, realpage, page, blockmask, column;
 	struct nand_chip *chip = mtd->priv;
 	uint32_t writelen = ops->len;
+
+	uint32_t oobwritelen = ops->ooblen;
+	uint32_t oobmaxlen = ops->mode == MTD_OOB_AUTO ?
+				mtd->oobavail : mtd->oobsize;
+
 	uint8_t *oob = ops->oobbuf;
 	uint8_t *buf = ops->datbuf;
 	int ret, subpage;
@@ -1890,6 +1955,10 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
 	if (likely(!oob))
 		memset(chip->oob_poi, 0xff, mtd->oobsize);
 
+	/* Don't allow multipage oob writes with offset */
+	if (oob && ops->ooboffs && (ops->ooboffs + ops->ooblen > oobmaxlen))
+		return -EINVAL;
+
 	while (1) {
 		WATCHDOG_RESET();
 
@@ -1907,8 +1976,11 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
 			wbuf = chip->buffers->databuf;
 		}
 
-		if (unlikely(oob))
-			oob = nand_fill_oob(chip, oob, ops);
+		if (unlikely(oob)) {
+			size_t len = min(oobwritelen, oobmaxlen);
+			oob = nand_fill_oob(chip, oob, len, ops);
+			oobwritelen -= len;
+		}
 
 		ret = chip->write_page(mtd, chip, wbuf, page, cached,
 				       (ops->mode == MTD_OOB_RAW));
@@ -2043,7 +2115,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
 		chip->pagebuf = -1;
 
 	memset(chip->oob_poi, 0xff, mtd->oobsize);
-	nand_fill_oob(chip, ops->oobbuf, ops);
+	nand_fill_oob(chip, ops->oobbuf, ops->ooblen, ops);
 	status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
 	memset(chip->oob_poi, 0xff, mtd->oobsize);
 
@@ -2166,27 +2238,10 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
 				__func__, (unsigned long long)instr->addr,
 				(unsigned long long)instr->len);
 
-	/* Start address must align on block boundary */
-	if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) {
-		MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
+	if (check_offs_len(mtd, instr->addr, instr->len))
 		return -EINVAL;
-	}
 
-	/* Length must align on block boundary */
-	if (instr->len & ((1 << chip->phys_erase_shift) - 1)) {
-		MTDDEBUG (MTD_DEBUG_LEVEL0,
-			  "nand_erase: Length not block aligned\n");
-		return -EINVAL;
-	}
-
-	/* Do not allow erase past end of device */
-	if ((instr->len + instr->addr) > mtd->size) {
-		MTDDEBUG (MTD_DEBUG_LEVEL0,
-			  "nand_erase: Erase past end of device\n");
-		return -EINVAL;
-	}
-
-	instr->fail_addr = 0xffffffff;
+	instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
 
 	/* Grab the lock and see if the device is available */
 	nand_get_device(chip, mtd, FL_ERASING);
@@ -2371,7 +2426,8 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
 	struct nand_chip *chip = mtd->priv;
 	int ret;
 
-	if ((ret = nand_block_isbad(mtd, ofs))) {
+	ret = nand_block_isbad(mtd, ofs);
+	if (ret) {
 		/* If it was bad already, return success and do nothing. */
 		if (ret > 0)
 			return 0;
@@ -2444,6 +2500,7 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
 	int i;
 	int val;
 
+	/* try ONFI for unknow chip or LP */
 	chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1);
 	if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' ||
 		chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I')
@@ -2486,7 +2543,6 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
 
 	if (!mtd->name)
 		mtd->name = p->model;
-
 	mtd->writesize = le32_to_cpu(p->byte_per_page);
 	mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
 	mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
@@ -2495,6 +2551,10 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
 	if (le16_to_cpu(p->features) & 1)
 		*busw = NAND_BUSWIDTH_16;
 
+	chip->options &= ~NAND_CHIPOPTIONS_MSK;
+	chip->options |= (NAND_NO_READRDY |
+			NAND_NO_AUTOINCR) & NAND_CHIPOPTIONS_MSK;
+
 	return 1;
 }
 #else
@@ -2506,41 +2566,6 @@ static inline int nand_flash_detect_onfi(struct mtd_info *mtd,
 }
 #endif
 
-static void nand_flash_detect_non_onfi(struct mtd_info *mtd,
-					struct nand_chip *chip,
-					const struct nand_flash_dev *type,
-					int *busw)
-{
-	/* Newer devices have all the information in additional id bytes */
-	if (!type->pagesize) {
-		int extid;
-		/* The 3rd id byte holds MLC / multichip data */
-		chip->cellinfo = chip->read_byte(mtd);
-		/* The 4th id byte is the important one */
-		extid = chip->read_byte(mtd);
-		/* Calc pagesize */
-		mtd->writesize = 1024 << (extid & 0x3);
-		extid >>= 2;
-		/* Calc oobsize */
-		mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9);
-		extid >>= 2;
-		/* Calc blocksize. Blocksize is multiples of 64KiB */
-		mtd->erasesize = (64 * 1024) << (extid & 0x03);
-		extid >>= 2;
-		/* Get buswidth information */
-		*busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
-
-	} else {
-		/*
-		 * Old devices have chip data hardcoded in the device id table
-		 */
-		mtd->erasesize = type->erasesize;
-		mtd->writesize = type->pagesize;
-		mtd->oobsize = mtd->writesize / 32;
-		*busw = type->options & NAND_BUSWIDTH_16;
-	}
-}
-
 /*
  * Get the flash and manufacturer id and lookup if the type is supported
  */
@@ -2550,8 +2575,9 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 						  int *maf_id, int *dev_id,
 						  const struct nand_flash_dev *type)
 {
-	int ret, maf_idx;
-	int tmp_id, tmp_manf;
+	int i, maf_idx;
+	u8 id_data[8];
+	int ret;
 
 	/* Select the device */
 	chip->select_chip(mtd, 0);
@@ -2577,15 +2603,13 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 
 	chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
 
-	/* Read manufacturer and device IDs */
-
-	tmp_manf = chip->read_byte(mtd);
-	tmp_id = chip->read_byte(mtd);
+	for (i = 0; i < 2; i++)
+		id_data[i] = chip->read_byte(mtd);
 
-	if (tmp_manf != *maf_id || tmp_id != *dev_id) {
+	if (id_data[0] != *maf_id || id_data[1] != *dev_id) {
 		printk(KERN_INFO "%s: second ID read did not match "
 		       "%02x,%02x against %02x,%02x\n", __func__,
-		       *maf_id, *dev_id, tmp_manf, tmp_id);
+		       *maf_id, *dev_id, id_data[0], id_data[1]);
 		return ERR_PTR(-ENODEV);
 	}
 
@@ -2596,30 +2620,121 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 		if (*dev_id == type->id)
 			break;
 
-	if (!type->name) {
-		/* supress warning if there is no nand */
-		if (*maf_id != 0x00 && *maf_id != 0xff &&
-		    *dev_id  != 0x00 && *dev_id  != 0xff)
-			printk(KERN_INFO "%s: unknown NAND device: "
-				"Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
-				__func__, *maf_id, *dev_id);
-		return ERR_PTR(-ENODEV);
+	chip->onfi_version = 0;
+	if (!type->name || !type->pagesize) {
+		/* Check is chip is ONFI compliant */
+		ret = nand_flash_detect_onfi(mtd, chip, &busw);
+		if (ret)
+			goto ident_done;
 	}
 
+	chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
+
+	/* Read entire ID string */
+
+	for (i = 0; i < 8; i++)
+		id_data[i] = chip->read_byte(mtd);
+
+	if (!type->name)
+		return ERR_PTR(-ENODEV);
+
 	if (!mtd->name)
 		mtd->name = type->name;
 
 	chip->chipsize = (uint64_t)type->chipsize << 20;
-	chip->onfi_version = 0;
 
-	ret = nand_flash_detect_onfi(mtd, chip, &busw);
-	if (!ret)
-		nand_flash_detect_non_onfi(mtd, chip, type, &busw);
+	if (!type->pagesize && chip->init_size) {
+		/* set the pagesize, oobsize, erasesize by the driver*/
+		busw = chip->init_size(mtd, chip, id_data);
+	} else if (!type->pagesize) {
+		int extid;
+		/* The 3rd id byte holds MLC / multichip data */
+		chip->cellinfo = id_data[2];
+		/* The 4th id byte is the important one */
+		extid = id_data[3];
+
+		/*
+		 * Field definitions are in the following datasheets:
+		 * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32)
+		 * New style   (6 byte ID): Samsung K9GBG08U0M (p.40)
+		 *
+		 * Check for wraparound + Samsung ID + nonzero 6th byte
+		 * to decide what to do.
+		 */
+		if (id_data[0] == id_data[6] && id_data[1] == id_data[7] &&
+				id_data[0] == NAND_MFR_SAMSUNG &&
+				(chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
+				id_data[5] != 0x00) {
+			/* Calc pagesize */
+			mtd->writesize = 2048 << (extid & 0x03);
+			extid >>= 2;
+			/* Calc oobsize */
+			switch (extid & 0x03) {
+			case 1:
+				mtd->oobsize = 128;
+				break;
+			case 2:
+				mtd->oobsize = 218;
+				break;
+			case 3:
+				mtd->oobsize = 400;
+				break;
+			default:
+				mtd->oobsize = 436;
+				break;
+			}
+			extid >>= 2;
+			/* Calc blocksize */
+			mtd->erasesize = (128 * 1024) <<
+				(((extid >> 1) & 0x04) | (extid & 0x03));
+			busw = 0;
+		} else {
+			/* Calc pagesize */
+			mtd->writesize = 1024 << (extid & 0x03);
+			extid >>= 2;
+			/* Calc oobsize */
+			mtd->oobsize = (8 << (extid & 0x01)) *
+				(mtd->writesize >> 9);
+			extid >>= 2;
+			/* Calc blocksize. Blocksize is multiples of 64KiB */
+			mtd->erasesize = (64 * 1024) << (extid & 0x03);
+			extid >>= 2;
+			/* Get buswidth information */
+			busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
+		}
+	} else {
+		/*
+		 * Old devices have chip data hardcoded in the device id table
+		 */
+		mtd->erasesize = type->erasesize;
+		mtd->writesize = type->pagesize;
+		mtd->oobsize = mtd->writesize / 32;
+		busw = type->options & NAND_BUSWIDTH_16;
 
+		/*
+		 * Check for Spansion/AMD ID + repeating 5th, 6th byte since
+		 * some Spansion chips have erasesize that conflicts with size
+		 * listed in nand_ids table
+		 * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39)
+		 */
+		if (*maf_id == NAND_MFR_AMD && id_data[4] != 0x00 &&
+				id_data[5] == 0x00 && id_data[6] == 0x00 &&
+				id_data[7] == 0x00 && mtd->writesize == 512) {
+			mtd->erasesize = 128 * 1024;
+			mtd->erasesize <<= ((id_data[3] & 0x03) << 1);
+		}
+	}
 	/* Get chip options, preserve non chip based options */
 	chip->options &= ~NAND_CHIPOPTIONS_MSK;
 	chip->options |= type->options & NAND_CHIPOPTIONS_MSK;
 
+	/* Check if chip is a not a samsung device. Do not clear the
+	 * options for chips which are not having an extended id.
+	 */
+	if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
+		chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
+ident_done:
+
 	/*
 	 * Set chip as a default. Board drivers can override it, if necessary
 	 */
@@ -2654,18 +2769,48 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 		ffs(mtd->erasesize) - 1;
 	if (chip->chipsize & 0xffffffff)
 		chip->chip_shift = ffs((unsigned)chip->chipsize) - 1;
-	else
-		chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32)) + 31;
+	else {
+		chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32));
+		chip->chip_shift += 32 - 1;
+	}
+
+	chip->badblockbits = 8;
 
 	/* Set the bad block position */
-	chip->badblockpos = mtd->writesize > 512 ?
-		NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
+	if (mtd->writesize > 512 || (busw & NAND_BUSWIDTH_16))
+		chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
+	else
+		chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
 
-	/* Check if chip is a not a samsung device. Do not clear the
-	 * options for chips which are not having an extended id.
+	/*
+	 * Bad block marker is stored in the last page of each block
+	 * on Samsung and Hynix MLC devices; stored in first two pages
+	 * of each block on Micron devices with 2KiB pages and on
+	 * SLC Samsung, Hynix, Toshiba and AMD/Spansion. All others scan
+	 * only the first page.
 	 */
-	if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
-		chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
+	if ((chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
+			(*maf_id == NAND_MFR_SAMSUNG ||
+			 *maf_id == NAND_MFR_HYNIX))
+		chip->options |= NAND_BBT_SCANLASTPAGE;
+	else if ((!(chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
+				(*maf_id == NAND_MFR_SAMSUNG ||
+				 *maf_id == NAND_MFR_HYNIX ||
+				 *maf_id == NAND_MFR_TOSHIBA ||
+				 *maf_id == NAND_MFR_AMD)) ||
+			(mtd->writesize == 2048 &&
+			 *maf_id == NAND_MFR_MICRON))
+		chip->options |= NAND_BBT_SCAN2NDPAGE;
+
+	/*
+	 * Numonyx/ST 2K pages, x8 bus use BOTH byte 1 and 6
+	 */
+	if (!(busw & NAND_BUSWIDTH_16) &&
+			*maf_id == NAND_MFR_STMICRO &&
+			mtd->writesize == 2048) {
+		chip->options |= NAND_BBT_SCANBYTE1AND6;
+		chip->badblockpos = 0;
+	}
 
 	/* Check for AND chips with 4 page planes */
 	if (chip->options & NAND_4PAGE_ARRAY)
@@ -2677,9 +2822,15 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 	if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
 		chip->cmdfunc = nand_command_lp;
 
+	/* TODO onfi flash name */
 	MTDDEBUG (MTD_DEBUG_LEVEL0, "NAND device: Manufacturer ID:"
-		  " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, *dev_id,
-		  nand_manuf_ids[maf_idx].name, type->name);
+		" 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, *dev_id,
+		nand_manuf_ids[maf_idx].name,
+#ifdef CONFIG_SYS_NAND_ONFI_DETECTION
+		chip->onfi_version ? chip->onfi_params.model : type->name);
+#else
+		type->name);
+#endif
 
 	return type;
 }
@@ -2865,7 +3016,8 @@ int nand_scan_tail(struct mtd_info *mtd)
 		chip->ecc.write_page_raw = nand_write_page_raw;
 		chip->ecc.read_oob = nand_read_oob_std;
 		chip->ecc.write_oob = nand_write_oob_std;
-		chip->ecc.size = 256;
+		if (!chip->ecc.size)
+			chip->ecc.size = 256;
 		chip->ecc.bytes = 3;
 		break;
 
@@ -2973,7 +3125,8 @@ int nand_scan_tail(struct mtd_info *mtd)
 
 	/* Fill in remaining MTD driver data */
 	mtd->type = MTD_NANDFLASH;
-	mtd->flags = MTD_CAP_NANDFLASH;
+	mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM :
+						MTD_CAP_NANDFLASH;
 	mtd->erase = nand_erase;
 	mtd->point = NULL;
 	mtd->unpoint = NULL;
@@ -2992,9 +3145,10 @@ int nand_scan_tail(struct mtd_info *mtd)
 
 	/* Check, if we should skip the bad block table scan */
 	if (chip->options & NAND_SKIP_BBTSCAN)
-		chip->options |= NAND_BBT_SCANNED;
+		return 0;
 
-	return 0;
+	/* Build bad block table */
+	return chip->scan_bbt(mtd);
 }
 
 /**
@@ -3039,4 +3193,9 @@ void nand_release(struct mtd_info *mtd)
 	kfree(chip->bbt);
 	if (!(chip->options & NAND_OWN_BUFFERS))
 		kfree(chip->buffers);
+
+	/* Free bad block descriptor memory */
+	if (chip->badblock_pattern && chip->badblock_pattern->options
+			& NAND_BBT_DYNAMICSTRUCT)
+		kfree(chip->badblock_pattern);
 }