Remove legacy NAND and disk on chip code.

Legacy NAND had been scheduled for removal.  Any boards that use this
were already not building in the previous release due to an #error.

The disk on chip code in common/cmd_doc.c relies on legacy NAND,
and it has also been removed.  There is newer disk on chip code
in drivers/mtd/nand; someone with access to hardware and sufficient
time and motivation can try to get that working, but for now disk
on chip is not supported.

Signed-off-by: Scott Wood <scottwood@freescale.com>

2 files changed, 0 insertions, 1658 deletions

diff --git a/drivers/mtd/nand_legacy/Makefile b/drivers/mtd/nand_legacy/Makefile
deleted file mode 100644
index a1a9cc9..0000000
--- a/drivers/mtd/nand_legacy/Makefile
+++ /dev/null
@@ -1,48 +0,0 @@
-#
-# (C) Copyright 2006
-# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# See file CREDITS for list of people who contributed to this
-# project.
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
-# MA 02111-1307 USA
-#
-
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)libnand_legacy.a
-
-ifdef CONFIG_CMD_NAND
-COBJS-$(CONFIG_NAND_LEGACY)	:= nand_legacy.o
-endif
-
-COBJS	:= $(COBJS-y)
-SRCS	:= $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-
-all:	$(LIB)
-
-$(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
diff --git a/drivers/mtd/nand_legacy/nand_legacy.c b/drivers/mtd/nand_legacy/nand_legacy.c
deleted file mode 100644
index d9ae9c7..0000000
--- a/drivers/mtd/nand_legacy/nand_legacy.c
+++ /dev/null
@@ -1,1610 +0,0 @@
-/*
- * (C) 2006 Denx
- * Driver for NAND support, Rick Bronson
- * borrowed heavily from:
- * (c) 1999 Machine Vision Holdings, Inc.
- * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org>
- *
- * Added 16-bit nand support
- * (C) 2004 Texas Instruments
- */
-
-#include <common.h>
-#include <command.h>
-#include <malloc.h>
-#include <asm/io.h>
-#include <watchdog.h>
-#include <linux/mtd/nand_legacy.h>
-#include <linux/mtd/nand_ids.h>
-#include <jffs2/jffs2.h>
-
-#error Legacy NAND is deprecated.  Please convert to the current NAND interface.
-#error This code will be removed outright in the next release.
-
-#ifdef CONFIG_OMAP1510
-void archflashwp(void *archdata, int wp);
-#endif
-
-#define ROUND_DOWN(value,boundary)      ((value) & (~((boundary)-1)))
-
-#undef	PSYCHO_DEBUG
-#undef	NAND_DEBUG
-
-/* ****************** WARNING *********************
- * When ALLOW_ERASE_BAD_DEBUG is non-zero the erase command will
- * erase (or at least attempt to erase) blocks that are marked
- * bad. This can be very handy if you are _sure_ that the block
- * is OK, say because you marked a good block bad to test bad
- * block handling and you are done testing, or if you have
- * accidentally marked blocks bad.
- *
- * Erasing factory marked bad blocks is a _bad_ idea. If the
- * erase succeeds there is no reliable way to find them again,
- * and attempting to program or erase bad blocks can affect
- * the data in _other_ (good) blocks.
- */
-#define	 ALLOW_ERASE_BAD_DEBUG 0
-
-#define CONFIG_MTD_NAND_ECC  /* enable ECC */
-#define CONFIG_MTD_NAND_ECC_JFFS2
-
-/* bits for nand_legacy_rw() `cmd'; or together as needed */
-#define NANDRW_READ	0x01
-#define NANDRW_WRITE	0x00
-#define NANDRW_JFFS2	0x02
-#define NANDRW_JFFS2_SKIP	0x04
-
-
-/*
- * Exported variables etc.
- */
-
-/* Definition of the out of band configuration structure */
-struct nand_oob_config {
-	/* position of ECC bytes inside oob */
-	int ecc_pos[6];
-	/* position of  bad blk flag inside oob -1 = inactive */
-	int badblock_pos;
-	/* position of ECC valid flag inside oob -1 = inactive */
-	int eccvalid_pos;
-} oob_config = { {0}, 0, 0};
-
-struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE] = {{0}};
-
-int curr_device = -1; /* Current NAND Device */
-
-
-/*
- * Exported functionss
- */
-int nand_legacy_erase(struct nand_chip* nand, size_t ofs,
-		     size_t len, int clean);
-int nand_legacy_rw(struct nand_chip* nand, int cmd,
-		  size_t start, size_t len,
-		  size_t * retlen, u_char * buf);
-void nand_print(struct nand_chip *nand);
-void nand_print_bad(struct nand_chip *nand);
-int nand_read_oob(struct nand_chip* nand, size_t ofs, size_t len,
-		 size_t * retlen, u_char * buf);
-int nand_write_oob(struct nand_chip* nand, size_t ofs, size_t len,
-		 size_t * retlen, const u_char * buf);
-
-/*
- * Internals
- */
-static int NanD_WaitReady(struct nand_chip *nand, int ale_wait);
-static int nand_read_ecc(struct nand_chip *nand, size_t start, size_t len,
-		 size_t * retlen, u_char *buf, u_char *ecc_code);
-static int nand_write_ecc (struct nand_chip* nand, size_t to, size_t len,
-			   size_t * retlen, const u_char * buf,
-			   u_char * ecc_code);
-#ifdef CONFIG_MTD_NAND_ECC
-static int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-static void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
-#endif
-
-
-/*
- *
- * Function definitions
- *
- */
-
-/* returns 0 if block containing pos is OK:
- *		valid erase block and
- *		not marked bad, or no bad mark position is specified
- * returns 1 if marked bad or otherwise invalid
- */
-static int check_block (struct nand_chip *nand, unsigned long pos)
-{
-	size_t retlen;
-	uint8_t oob_data;
-	uint16_t oob_data16[6];
-	int page0 = pos & (-nand->erasesize);
-	int page1 = page0 + nand->oobblock;
-	int badpos = oob_config.badblock_pos;
-
-	if (pos >= nand->totlen)
-		return 1;
-
-	if (badpos < 0)
-		return 0;	/* no way to check, assume OK */
-
-	if (nand->bus16) {
-		if (nand_read_oob(nand, (page0 + 0), 12, &retlen, (uint8_t *)oob_data16)
-		    || (oob_data16[2] & 0xff00) != 0xff00)
-			return 1;
-		if (nand_read_oob(nand, (page1 + 0), 12, &retlen, (uint8_t *)oob_data16)
-		    || (oob_data16[2] & 0xff00) != 0xff00)
-			return 1;
-	} else {
-		/* Note - bad block marker can be on first or second page */
-		if (nand_read_oob(nand, page0 + badpos, 1, &retlen, (unsigned char *)&oob_data)
-		    || oob_data != 0xff
-		    || nand_read_oob (nand, page1 + badpos, 1, &retlen, (unsigned char *)&oob_data)
-		    || oob_data != 0xff)
-			return 1;
-	}
-
-	return 0;
-}
-
-/* print bad blocks in NAND flash */
-void nand_print_bad(struct nand_chip* nand)
-{
-	unsigned long pos;
-
-	for (pos = 0; pos < nand->totlen; pos += nand->erasesize) {
-		if (check_block(nand, pos))
-			printf(" 0x%8.8lx\n", pos);
-	}
-	puts("\n");
-}
-
-/* cmd: 0: NANDRW_WRITE			write, fail on bad block
- *	1: NANDRW_READ			read, fail on bad block
- *	2: NANDRW_WRITE | NANDRW_JFFS2	write, skip bad blocks
- *	3: NANDRW_READ | NANDRW_JFFS2	read, data all 0xff for bad blocks
- *      7: NANDRW_READ | NANDRW_JFFS2 | NANDRW_JFFS2_SKIP read, skip bad blocks
- */
-int nand_legacy_rw (struct nand_chip* nand, int cmd,
-		   size_t start, size_t len,
-		   size_t * retlen, u_char * buf)
-{
-	int ret = 0, n, total = 0;
-	char eccbuf[6];
-	/* eblk (once set) is the start of the erase block containing the
-	 * data being processed.
-	 */
-	unsigned long eblk = ~0;	/* force mismatch on first pass */
-	unsigned long erasesize = nand->erasesize;
-
-	while (len) {
-		if ((start & (-erasesize)) != eblk) {
-			/* have crossed into new erase block, deal with
-			 * it if it is sure marked bad.
-			 */
-			eblk = start & (-erasesize); /* start of block */
-			if (check_block(nand, eblk)) {
-				if (cmd == (NANDRW_READ | NANDRW_JFFS2)) {
-					while (len > 0 &&
-					       start - eblk < erasesize) {
-						*(buf++) = 0xff;
-						++start;
-						++total;
-						--len;
-					}
-					continue;
-				} else if (cmd == (NANDRW_READ | NANDRW_JFFS2 | NANDRW_JFFS2_SKIP)) {
-					start += erasesize;
-					continue;
-				} else if (cmd == (NANDRW_WRITE | NANDRW_JFFS2)) {
-					/* skip bad block */
-					start += erasesize;
-					continue;
-				} else {
-					ret = 1;
-					break;
-				}
-			}
-		}
-		/* The ECC will not be calculated correctly if
-		   less than 512 is written or read */
-		/* Is request at least 512 bytes AND it starts on a proper boundry */
-		if((start != ROUND_DOWN(start, 0x200)) || (len < 0x200))
-			printf("Warning block writes should be at least 512 bytes and start on a 512 byte boundry\n");
-
-		if (cmd & NANDRW_READ) {
-			ret = nand_read_ecc(nand, start,
-					   min(len, eblk + erasesize - start),
-					   (size_t *)&n, (u_char*)buf, (u_char *)eccbuf);
-		} else {
-			ret = nand_write_ecc(nand, start,
-					    min(len, eblk + erasesize - start),
-					    (size_t *)&n, (u_char*)buf, (u_char *)eccbuf);
-		}
-
-		if (ret)
-			break;
-
-		start  += n;
-		buf   += n;
-		total += n;
-		len   -= n;
-	}
-	if (retlen)
-		*retlen = total;
-
-	return ret;
-}
-
-void nand_print(struct nand_chip *nand)
-{
-	if (nand->numchips > 1) {
-		printf("%s at 0x%lx,\n"
-		       "\t  %d chips %s, size %d MB, \n"
-		       "\t  total size %ld MB, sector size %ld kB\n",
-		       nand->name, nand->IO_ADDR, nand->numchips,
-		       nand->chips_name, 1 << (nand->chipshift - 20),
-		       nand->totlen >> 20, nand->erasesize >> 10);
-	}
-	else {
-		printf("%s at 0x%lx (", nand->chips_name, nand->IO_ADDR);
-		print_size(nand->totlen, ", ");
-		print_size(nand->erasesize, " sector)\n");
-	}
-}
-
-/* ------------------------------------------------------------------------- */
-
-static int NanD_WaitReady(struct nand_chip *nand, int ale_wait)
-{
-	/* This is inline, to optimise the common case, where it's ready instantly */
-	int ret = 0;
-
-#ifdef NAND_NO_RB	/* in config file, shorter delays currently wrap accesses */
-	if(ale_wait)
-		NAND_WAIT_READY(nand);	/* do the worst case 25us wait */
-	else
-		udelay(10);
-#else	/* has functional r/b signal */
-	NAND_WAIT_READY(nand);
-#endif
-	return ret;
-}
-
-/* NanD_Command: Send a flash command to the flash chip */
-
-static inline int NanD_Command(struct nand_chip *nand, unsigned char command)
-{
-	unsigned long nandptr = nand->IO_ADDR;
-
-	/* Assert the CLE (Command Latch Enable) line to the flash chip */
-	NAND_CTL_SETCLE(nandptr);
-
-	/* Send the command */
-	WRITE_NAND_COMMAND(command, nandptr);
-
-	/* Lower the CLE line */
-	NAND_CTL_CLRCLE(nandptr);
-
-#ifdef NAND_NO_RB
-	if(command == NAND_CMD_RESET){
-		u_char ret_val;
-		NanD_Command(nand, NAND_CMD_STATUS);
-		do {
-			ret_val = READ_NAND(nandptr);/* wait till ready */
-		} while((ret_val & 0x40) != 0x40);
-	}
-#endif
-	return NanD_WaitReady(nand, 0);
-}
-
-/* NanD_Address: Set the current address for the flash chip */
-
-static int NanD_Address(struct nand_chip *nand, int numbytes, unsigned long ofs)
-{
-	unsigned long nandptr;
-	int i;
-
-	nandptr = nand->IO_ADDR;
-
-	/* Assert the ALE (Address Latch Enable) line to the flash chip */
-	NAND_CTL_SETALE(nandptr);
-
-	/* Send the address */
-	/* Devices with 256-byte page are addressed as:
-	 * Column (bits 0-7), Page (bits 8-15, 16-23, 24-31)
-	 * there is no device on the market with page256
-	 * and more than 24 bits.
-	 * Devices with 512-byte page are addressed as:
-	 * Column (bits 0-7), Page (bits 9-16, 17-24, 25-31)
-	 * 25-31 is sent only if the chip support it.
-	 * bit 8 changes the read command to be sent
-	 * (NAND_CMD_READ0 or NAND_CMD_READ1).
-	 */
-
-	if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE)
-		WRITE_NAND_ADDRESS(ofs, nandptr);
-
-	ofs = ofs >> nand->page_shift;
-
-	if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) {
-		for (i = 0; i < nand->pageadrlen; i++, ofs = ofs >> 8) {
-			WRITE_NAND_ADDRESS(ofs, nandptr);
-		}
-	}
-
-	/* Lower the ALE line */
-	NAND_CTL_CLRALE(nandptr);
-
-	/* Wait for the chip to respond */
-	return NanD_WaitReady(nand, 1);
-}
-
-/* NanD_SelectChip: Select a given flash chip within the current floor */
-
-static inline int NanD_SelectChip(struct nand_chip *nand, int chip)
-{
-	/* Wait for it to be ready */
-	return NanD_WaitReady(nand, 0);
-}
-
-/* NanD_IdentChip: Identify a given NAND chip given {floor,chip} */
-
-static int NanD_IdentChip(struct nand_chip *nand, int floor, int chip)
-{
-	int mfr, id, i;
-
-	NAND_ENABLE_CE(nand);  /* set pin low */
-	/* Reset the chip */
-	if (NanD_Command(nand, NAND_CMD_RESET)) {
-#ifdef NAND_DEBUG
-		printf("NanD_Command (reset) for %d,%d returned true\n",
-		       floor, chip);
-#endif
-		NAND_DISABLE_CE(nand);  /* set pin high */
-		return 0;
-	}
-
-	/* Read the NAND chip ID: 1. Send ReadID command */
-	if (NanD_Command(nand, NAND_CMD_READID)) {
-#ifdef NAND_DEBUG
-		printf("NanD_Command (ReadID) for %d,%d returned true\n",
-		       floor, chip);
-#endif
-		NAND_DISABLE_CE(nand);  /* set pin high */
-		return 0;
-	}
-
-	/* Read the NAND chip ID: 2. Send address byte zero */
-	NanD_Address(nand, ADDR_COLUMN, 0);
-
-	/* Read the manufacturer and device id codes from the device */
-
-	mfr = READ_NAND(nand->IO_ADDR);
-
-	id = READ_NAND(nand->IO_ADDR);
-
-	NAND_DISABLE_CE(nand);  /* set pin high */
-
-#ifdef NAND_DEBUG
-	printf("NanD_Command (ReadID) got %x %x\n", mfr, id);
-#endif
-	if (mfr == 0xff || mfr == 0) {
-		/* No response - return failure */
-		return 0;
-	}
-
-	/* Check it's the same as the first chip we identified.
-	 * M-Systems say that any given nand_chip device should only
-	 * contain _one_ type of flash part, although that's not a
-	 * hardware restriction. */
-	if (nand->mfr) {
-		if (nand->mfr == mfr && nand->id == id) {
-			return 1;	/* This is another the same the first */
-		} else {
-			printf("Flash chip at floor %d, chip %d is different:\n",
-			       floor, chip);
-		}
-	}
-
-	/* Print and store the manufacturer and ID codes. */
-	for (i = 0; nand_flash_ids[i].name != NULL; i++) {
-		if (mfr == nand_flash_ids[i].manufacture_id &&
-		    id == nand_flash_ids[i].model_id) {
-#ifdef NAND_DEBUG
-			printf("Flash chip found:\n\t Manufacturer ID: 0x%2.2X, "
-			       "Chip ID: 0x%2.2X (%s)\n", mfr, id,
-			       nand_flash_ids[i].name);
-#endif
-			if (!nand->mfr) {
-				nand->mfr = mfr;
-				nand->id = id;
-				nand->chipshift =
-				    nand_flash_ids[i].chipshift;
-				nand->page256 = nand_flash_ids[i].page256;
-				nand->eccsize = 256;
-				if (nand->page256) {
-					nand->oobblock = 256;
-					nand->oobsize = 8;
-					nand->page_shift = 8;
-				} else {
-					nand->oobblock = 512;
-					nand->oobsize = 16;
-					nand->page_shift = 9;
-				}
-				nand->pageadrlen = nand_flash_ids[i].pageadrlen;
-				nand->erasesize  = nand_flash_ids[i].erasesize;
-				nand->chips_name = nand_flash_ids[i].name;
-				nand->bus16	 = nand_flash_ids[i].bus16;
-				return 1;
-			}
-			return 0;
-		}
-	}
-
-
-#ifdef NAND_DEBUG
-	/* We haven't fully identified the chip. Print as much as we know. */
-	printf("Unknown flash chip found: %2.2X %2.2X\n",
-	       id, mfr);
-#endif
-
-	return 0;
-}
-
-/* NanD_ScanChips: Find all NAND chips present in a nand_chip, and identify them */
-
-static void NanD_ScanChips(struct nand_chip *nand)
-{
-	int floor, chip;
-	int numchips[NAND_MAX_FLOORS];
-	int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
-	int ret = 1;
-
-	nand->numchips = 0;
-	nand->mfr = 0;
-	nand->id = 0;
-
-
-	/* For each floor, find the number of valid chips it contains */
-	for (floor = 0; floor < NAND_MAX_FLOORS; floor++) {
-		ret = 1;
-		numchips[floor] = 0;
-		for (chip = 0; chip < maxchips && ret != 0; chip++) {
-
-			ret = NanD_IdentChip(nand, floor, chip);
-			if (ret) {
-				numchips[floor]++;
-				nand->numchips++;
-			}
-		}
-	}
-
-	/* If there are none at all that we recognise, bail */
-	if (!nand->numchips) {
-#ifdef NAND_DEBUG
-		puts ("No NAND flash chips recognised.\n");
-#endif
-		return;
-	}
-
-	/* Allocate an array to hold the information for each chip */
-	nand->chips = malloc(sizeof(struct Nand) * nand->numchips);
-	if (!nand->chips) {
-		puts ("No memory for allocating chip info structures\n");
-		return;
-	}
-
-	ret = 0;
-
-	/* Fill out the chip array with {floor, chipno} for each
-	 * detected chip in the device. */
-	for (floor = 0; floor < NAND_MAX_FLOORS; floor++) {
-		for (chip = 0; chip < numchips[floor]; chip++) {
-			nand->chips[ret].floor = floor;
-			nand->chips[ret].chip = chip;
-			nand->chips[ret].curadr = 0;
-			nand->chips[ret].curmode = 0x50;
-			ret++;
-		}
-	}
-
-	/* Calculate and print the total size of the device */
-	nand->totlen = nand->numchips * (1 << nand->chipshift);
-
-#ifdef NAND_DEBUG
-	printf("%d flash chips found. Total nand_chip size: %ld MB\n",
-	       nand->numchips, nand->totlen >> 20);
-#endif
-}
-
-/* we need to be fast here, 1 us per read translates to 1 second per meg */
-static void NanD_ReadBuf (struct nand_chip *nand, u_char * data_buf, int cntr)
-{
-	unsigned long nandptr = nand->IO_ADDR;
-
-	NanD_Command (nand, NAND_CMD_READ0);
-
-	if (nand->bus16) {
-		u16 val;
-
-		while (cntr >= 16) {
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			cntr -= 16;
-		}
-
-		while (cntr > 0) {
-			val = READ_NAND (nandptr);
-			*data_buf++ = val & 0xff;
-			*data_buf++ = val >> 8;
-			cntr -= 2;
-		}
-	} else {
-		while (cntr >= 16) {
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			*data_buf++ = READ_NAND (nandptr);
-			cntr -= 16;
-		}
-
-		while (cntr > 0) {
-			*data_buf++ = READ_NAND (nandptr);
-			cntr--;
-		}
-	}
-}
-
-/*
- * NAND read with ECC
- */
-static int nand_read_ecc(struct nand_chip *nand, size_t start, size_t len,
-		 size_t * retlen, u_char *buf, u_char *ecc_code)
-{
-	int col, page;
-	int ecc_status = 0;
-#ifdef CONFIG_MTD_NAND_ECC
-	int j;
-	int ecc_failed = 0;
-	u_char *data_poi;
-	u_char ecc_calc[6];
-#endif
-
-	/* Do not allow reads past end of device */
-	if ((start + len) > nand->totlen) {
-		printf ("%s: Attempt read beyond end of device %x %x %x\n",
-			__FUNCTION__, (uint) start, (uint) len, (uint) nand->totlen);
-		*retlen = 0;
-		return -1;
-	}
-
-	/* First we calculate the starting page */
-	/*page = shr(start, nand->page_shift);*/
-	page = start >> nand->page_shift;
-
-	/* Get raw starting column */
-	col = start & (nand->oobblock - 1);
-
-	/* Initialize return value */
-	*retlen = 0;
-
-	/* Select the NAND device */
-	NAND_ENABLE_CE(nand);  /* set pin low */
-
-	/* Loop until all data read */
-	while (*retlen < len) {
-
-#ifdef CONFIG_MTD_NAND_ECC
-		/* Do we have this page in cache ? */
-		if (nand->cache_page == page)
-			goto readdata;
-		/* Send the read command */
-		NanD_Command(nand, NAND_CMD_READ0);
-		if (nand->bus16) {
-			NanD_Address(nand, ADDR_COLUMN_PAGE,
-				     (page << nand->page_shift) + (col >> 1));
-		} else {
-			NanD_Address(nand, ADDR_COLUMN_PAGE,
-				     (page << nand->page_shift) + col);
-		}
-
-		/* Read in a page + oob data */
-		NanD_ReadBuf(nand, nand->data_buf, nand->oobblock + nand->oobsize);
-
-		/* copy data into cache, for read out of cache and if ecc fails */
-		if (nand->data_cache) {
-			memcpy (nand->data_cache, nand->data_buf,
-				nand->oobblock + nand->oobsize);
-		}
-
-		/* Pick the ECC bytes out of the oob data */
-		for (j = 0; j < 6; j++) {
-			ecc_code[j] = nand->data_buf[(nand->oobblock + oob_config.ecc_pos[j])];
-		}
-
-		/* Calculate the ECC and verify it */
-		/* If block was not written with ECC, skip ECC */
-		if (oob_config.eccvalid_pos != -1 &&
-		    (nand->data_buf[nand->oobblock + oob_config.eccvalid_pos] & 0x0f) != 0x0f) {
-
-			nand_calculate_ecc (&nand->data_buf[0], &ecc_calc[0]);
-			switch (nand_correct_data (&nand->data_buf[0], &ecc_code[0], &ecc_calc[0])) {
-			case -1:
-				printf ("%s: Failed ECC read, page 0x%08x\n", __FUNCTION__, page);
-				ecc_failed++;
-				break;
-			case 1:
-			case 2:	/* transfer ECC corrected data to cache */
-				if (nand->data_cache)
-					memcpy (nand->data_cache, nand->data_buf, 256);
-				break;
-			}
-		}
-
-		if (oob_config.eccvalid_pos != -1 &&
-		    nand->oobblock == 512 && (nand->data_buf[nand->oobblock + oob_config.eccvalid_pos] & 0xf0) != 0xf0) {
-
-			nand_calculate_ecc (&nand->data_buf[256], &ecc_calc[3]);
-			switch (nand_correct_data (&nand->data_buf[256], &ecc_code[3], &ecc_calc[3])) {
-			case -1:
-				printf ("%s: Failed ECC read, page 0x%08x\n", __FUNCTION__, page);
-				ecc_failed++;
-				break;
-			case 1:
-			case 2:	/* transfer ECC corrected data to cache */
-				if (nand->data_cache)
-					memcpy (&nand->data_cache[256], &nand->data_buf[256], 256);
-				break;
-			}
-		}
-readdata:
-		/* Read the data from ECC data buffer into return buffer */
-		data_poi = (nand->data_cache) ? nand->data_cache : nand->data_buf;
-		data_poi += col;
-		if ((*retlen + (nand->oobblock - col)) >= len) {
-			memcpy (buf + *retlen, data_poi, len - *retlen);
-			*retlen = len;
-		} else {
-			memcpy (buf + *retlen, data_poi,  nand->oobblock - col);
-			*retlen += nand->oobblock - col;
-		}
-		/* Set cache page address, invalidate, if ecc_failed */
-		nand->cache_page = (nand->data_cache && !ecc_failed) ? page : -1;
-
-		ecc_status += ecc_failed;
-		ecc_failed = 0;
-
-#else
-		/* Send the read command */
-		NanD_Command(nand, NAND_CMD_READ0);
-		if (nand->bus16) {
-			NanD_Address(nand, ADDR_COLUMN_PAGE,
-				     (page << nand->page_shift) + (col >> 1));
-		} else {
-			NanD_Address(nand, ADDR_COLUMN_PAGE,
-				     (page << nand->page_shift) + col);
-		}
-
-		/* Read the data directly into the return buffer */
-		if ((*retlen + (nand->oobblock - col)) >= len) {
-			NanD_ReadBuf(nand, buf + *retlen, len - *retlen);
-			*retlen = len;
-			/* We're done */
-			continue;
-		} else {
-			NanD_ReadBuf(nand, buf + *retlen, nand->oobblock - col);
-			*retlen += nand->oobblock - col;
-			}
-#endif
-		/* For subsequent reads align to page boundary. */
-		col = 0;
-		/* Increment page address */
-		page++;
-	}
-
-	/* De-select the NAND device */
-	NAND_DISABLE_CE(nand);  /* set pin high */
-
-	/*
-	 * Return success, if no ECC failures, else -EIO
-	 * fs driver will take care of that, because
-	 * retlen == desired len and result == -EIO
-	 */
-	return ecc_status ? -1 : 0;
-}
-
-/*
- *	Nand_page_program function is used for write and writev !
- */
-static int nand_write_page (struct nand_chip *nand,
-			    int page, int col, int last, u_char * ecc_code)
-{
-
-	int i;
-	unsigned long nandptr = nand->IO_ADDR;
-
-#ifdef CONFIG_MTD_NAND_ECC
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-	int ecc_bytes = (nand->oobblock == 512) ? 6 : 3;
-#endif
-#endif
-	/* pad oob area */
-	for (i = nand->oobblock; i < nand->oobblock + nand->oobsize; i++)
-		nand->data_buf[i] = 0xff;
-
-#ifdef CONFIG_MTD_NAND_ECC
-	/* Zero out the ECC array */
-	for (i = 0; i < 6; i++)
-		ecc_code[i] = 0x00;
-
-	/* Read back previous written data, if col > 0 */
-	if (col) {
-		NanD_Command (nand, NAND_CMD_READ0);
-		if (nand->bus16) {
-			NanD_Address (nand, ADDR_COLUMN_PAGE,
-				      (page << nand->page_shift) + (col >> 1));
-		} else {
-			NanD_Address (nand, ADDR_COLUMN_PAGE,
-				      (page << nand->page_shift) + col);
-		}
-
-		if (nand->bus16) {
-			u16 val;
-
-			for (i = 0; i < col; i += 2) {
-				val = READ_NAND (nandptr);
-				nand->data_buf[i] = val & 0xff;
-				nand->data_buf[i + 1] = val >> 8;
-			}
-		} else {
-			for (i = 0; i < col; i++)
-				nand->data_buf[i] = READ_NAND (nandptr);
-		}
-	}
-
-	/* Calculate and write the ECC if we have enough data */
-	if ((col < nand->eccsize) && (last >= nand->eccsize)) {
-		nand_calculate_ecc (&nand->data_buf[0], &(ecc_code[0]));
-		for (i = 0; i < 3; i++) {
-			nand->data_buf[(nand->oobblock +
-					oob_config.ecc_pos[i])] = ecc_code[i];
-		}
-		if (oob_config.eccvalid_pos != -1) {
-			nand->data_buf[nand->oobblock +
-				       oob_config.eccvalid_pos] = 0xf0;
-		}
-	}
-
-	/* Calculate and write the second ECC if we have enough data */
-	if ((nand->oobblock == 512) && (last == nand->oobblock)) {
-		nand_calculate_ecc (&nand->data_buf[256], &(ecc_code[3]));
-		for (i = 3; i < 6; i++) {
-			nand->data_buf[(nand->oobblock +
-					oob_config.ecc_pos[i])] = ecc_code[i];
-		}
-		if (oob_config.eccvalid_pos != -1) {
-			nand->data_buf[nand->oobblock +
-				       oob_config.eccvalid_pos] &= 0x0f;
-		}
-	}
-#endif
-	/* Prepad for partial page programming !!! */
-	for (i = 0; i < col; i++)
-		nand->data_buf[i] = 0xff;
-
-	/* Postpad for partial page programming !!! oob is already padded */
-	for (i = last; i < nand->oobblock; i++)
-		nand->data_buf[i] = 0xff;
-
-	/* Send command to begin auto page programming */
-	NanD_Command (nand, NAND_CMD_READ0);
-	NanD_Command (nand, NAND_CMD_SEQIN);
-	if (nand->bus16) {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + (col >> 1));
-	} else {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + col);
-	}
-
-	/* Write out complete page of data */
-	if (nand->bus16) {
-		for (i = 0; i < (nand->oobblock + nand->oobsize); i += 2) {
-			WRITE_NAND (nand->data_buf[i] +
-				    (nand->data_buf[i + 1] << 8),
-				    nand->IO_ADDR);
-		}
-	} else {
-		for (i = 0; i < (nand->oobblock + nand->oobsize); i++)
-			WRITE_NAND (nand->data_buf[i], nand->IO_ADDR);
-	}
-
-	/* Send command to actually program the data */
-	NanD_Command (nand, NAND_CMD_PAGEPROG);
-	NanD_Command (nand, NAND_CMD_STATUS);
-#ifdef NAND_NO_RB
-	{
-		u_char ret_val;
-
-		do {
-			ret_val = READ_NAND (nandptr);	/* wait till ready */
-		} while ((ret_val & 0x40) != 0x40);
-	}
-#endif
-	/* See if device thinks it succeeded */
-	if (READ_NAND (nand->IO_ADDR) & 0x01) {
-		printf ("%s: Failed write, page 0x%08x, ", __FUNCTION__,
-			page);
-		return -1;
-	}
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-	/*
-	 * The NAND device assumes that it is always writing to
-	 * a cleanly erased page. Hence, it performs its internal
-	 * write verification only on bits that transitioned from
-	 * 1 to 0. The device does NOT verify the whole page on a
-	 * byte by byte basis. It is possible that the page was
-	 * not completely erased or the page is becoming unusable
-	 * due to wear. The read with ECC would catch the error
-	 * later when the ECC page check fails, but we would rather
-	 * catch it early in the page write stage. Better to write
-	 * no data than invalid data.
-	 */
-
-	/* Send command to read back the page */
-	if (col < nand->eccsize)
-		NanD_Command (nand, NAND_CMD_READ0);
-	else
-		NanD_Command (nand, NAND_CMD_READ1);
-	if (nand->bus16) {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + (col >> 1));
-	} else {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + col);
-	}
-
-	/* Loop through and verify the data */
-	if (nand->bus16) {
-		for (i = col; i < last; i = +2) {
-			if ((nand->data_buf[i] +
-			     (nand->data_buf[i + 1] << 8)) != READ_NAND (nand->IO_ADDR)) {
-				printf ("%s: Failed write verify, page 0x%08x ",
-					__FUNCTION__, page);
-				return -1;
-			}
-		}
-	} else {
-		for (i = col; i < last; i++) {
-			if (nand->data_buf[i] != READ_NAND (nand->IO_ADDR)) {
-				printf ("%s: Failed write verify, page 0x%08x ",
-					__FUNCTION__, page);
-				return -1;
-			}
-		}
-	}
-
-#ifdef CONFIG_MTD_NAND_ECC
-	/*
-	 * We also want to check that the ECC bytes wrote
-	 * correctly for the same reasons stated above.
-	 */
-	NanD_Command (nand, NAND_CMD_READOOB);
-	if (nand->bus16) {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + (col >> 1));
-	} else {
-		NanD_Address (nand, ADDR_COLUMN_PAGE,
-			      (page << nand->page_shift) + col);
-	}
-	if (nand->bus16) {
-		for (i = 0; i < nand->oobsize; i += 2) {
-			u16 val;
-
-			val = READ_NAND (nand->IO_ADDR);
-			nand->data_buf[i] = val & 0xff;
-			nand->data_buf[i + 1] = val >> 8;
-		}
-	} else {
-		for (i = 0; i < nand->oobsize; i++) {
-			nand->data_buf[i] = READ_NAND (nand->IO_ADDR);
-		}
-	}
-	for (i = 0; i < ecc_bytes; i++) {
-		if ((nand->data_buf[(oob_config.ecc_pos[i])] != ecc_code[i]) && ecc_code[i]) {
-			printf ("%s: Failed ECC write "
-				"verify, page 0x%08x, "
-				"%6i bytes were succesful\n",
-				__FUNCTION__, page, i);
-			return -1;
-		}
-	}
-#endif	/* CONFIG_MTD_NAND_ECC */
-#endif	/* CONFIG_MTD_NAND_VERIFY_WRITE */
-	return 0;
-}
-
-static int nand_write_ecc (struct nand_chip* nand, size_t to, size_t len,
-			   size_t * retlen, const u_char * buf, u_char * ecc_code)
-{
-	int i, page, col, cnt, ret = 0;
-
-	/* Do not allow write past end of device */
-	if ((to + len) > nand->totlen) {
-		printf ("%s: Attempt to write past end of page\n", __FUNCTION__);
-		return -1;
-	}
-
-	/* Shift to get page */
-	page = ((int) to) >> nand->page_shift;
-
-	/* Get the starting column */
-	col = to & (nand->oobblock - 1);
-
-	/* Initialize return length value */
-	*retlen = 0;
-
-	/* Select the NAND device */
-#ifdef CONFIG_OMAP1510
-	archflashwp(0,0);
-#endif
-#ifdef CONFIG_SYS_NAND_WP
-	NAND_WP_OFF();
-#endif
-
-	NAND_ENABLE_CE(nand);  /* set pin low */
-
-	/* Check the WP bit */
-	NanD_Command(nand, NAND_CMD_STATUS);
-	if (!(READ_NAND(nand->IO_ADDR) & 0x80)) {
-		printf ("%s: Device is write protected!!!\n", __FUNCTION__);
-		ret = -1;
-		goto out;
-	}
-
-	/* Loop until all data is written */
-	while (*retlen < len) {
-		/* Invalidate cache, if we write to this page */
-		if (nand->cache_page == page)
-			nand->cache_page = -1;
-
-		/* Write data into buffer */
-		if ((col + len) >= nand->oobblock) {
-			for (i = col, cnt = 0; i < nand->oobblock; i++, cnt++) {
-				nand->data_buf[i] = buf[(*retlen + cnt)];
-			}
-		} else {
-			for (i = col, cnt = 0; cnt < (len - *retlen); i++, cnt++) {
-				nand->data_buf[i] = buf[(*retlen + cnt)];
-			}
-		}
-		/* We use the same function for write and writev !) */
-		ret = nand_write_page (nand, page, col, i, ecc_code);
-		if (ret)
-			goto out;
-
-		/* Next data start at page boundary */
-		col = 0;
-
-		/* Update written bytes count */
-		*retlen += cnt;
-
-		/* Increment page address */
-		page++;
-	}
-
-	/* Return happy */
-	*retlen = len;
-
-out:
-	/* De-select the NAND device */
-	NAND_DISABLE_CE(nand);  /* set pin high */
-#ifdef CONFIG_OMAP1510
-	archflashwp(0,1);
-#endif
-#ifdef CONFIG_SYS_NAND_WP
-	NAND_WP_ON();
-#endif
-
-	return ret;
-}
-
-/* read from the 16 bytes of oob data that correspond to a 512 byte
- * page or 2 256-byte pages.
- */
-int nand_read_oob(struct nand_chip* nand, size_t ofs, size_t len,
-			 size_t * retlen, u_char * buf)
-{
-	int len256 = 0;
-	struct Nand *mychip;
-	int ret = 0;
-
-	mychip = &nand->chips[ofs >> nand->chipshift];
-
-	/* update address for 2M x 8bit devices. OOB starts on the second */
-	/* page to maintain compatibility with nand_read_ecc. */
-	if (nand->page256) {
-		if (!(ofs & 0x8))
-			ofs += 0x100;
-		else
-			ofs -= 0x8;
-	}
-
-	NAND_ENABLE_CE(nand);  /* set pin low */
-	NanD_Command(nand, NAND_CMD_READOOB);
-	if (nand->bus16) {
-		NanD_Address(nand, ADDR_COLUMN_PAGE,
-			     ((ofs >> nand->page_shift) << nand->page_shift) +
-				((ofs & (nand->oobblock - 1)) >> 1));
-	} else {
-		NanD_Address(nand, ADDR_COLUMN_PAGE, ofs);
-	}
-
-	/* treat crossing 8-byte OOB data for 2M x 8bit devices */
-	/* Note: datasheet says it should automaticaly wrap to the */
-	/*       next OOB block, but it didn't work here. mf.      */
-	if (nand->page256 && ofs + len > (ofs | 0x7) + 1) {
-		len256 = (ofs | 0x7) + 1 - ofs;
-		NanD_ReadBuf(nand, buf, len256);
-
-		NanD_Command(nand, NAND_CMD_READOOB);
-		NanD_Address(nand, ADDR_COLUMN_PAGE, ofs & (~0x1ff));
-	}
-
-	NanD_ReadBuf(nand, &buf[len256], len - len256);
-
-	*retlen = len;
-	/* Reading the full OOB data drops us off of the end of the page,
-	 * causing the flash device to go into busy mode, so we need
-	 * to wait until ready 11.4.1 and Toshiba TC58256FT nands */
-
-	ret = NanD_WaitReady(nand, 1);
-	NAND_DISABLE_CE(nand);  /* set pin high */
-
-	return ret;
-
-}
-
-/* write to the 16 bytes of oob data that correspond to a 512 byte
- * page or 2 256-byte pages.
- */
-int nand_write_oob(struct nand_chip* nand, size_t ofs, size_t len,
-		  size_t * retlen, const u_char * buf)
-{
-	int len256 = 0;
-	int i;
-	unsigned long nandptr = nand->IO_ADDR;
-
-#ifdef PSYCHO_DEBUG
-	printf("nand_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n",
-	       (long)ofs, len, buf[0], buf[1], buf[2], buf[3],
-	       buf[8], buf[9], buf[14],buf[15]);
-#endif
-
-	NAND_ENABLE_CE(nand);  /* set pin low to enable chip */
-
-	/* Reset the chip */
-	NanD_Command(nand, NAND_CMD_RESET);
-
-	/* issue the Read2 command to set the pointer to the Spare Data Area. */
-	NanD_Command(nand, NAND_CMD_READOOB);
-	if (nand->bus16) {
-		NanD_Address(nand, ADDR_COLUMN_PAGE,
-			     ((ofs >> nand->page_shift) << nand->page_shift) +
-				((ofs & (nand->oobblock - 1)) >> 1));
-	} else {
-		NanD_Address(nand, ADDR_COLUMN_PAGE, ofs);
-	}
-
-	/* update address for 2M x 8bit devices. OOB starts on the second */
-	/* page to maintain compatibility with nand_read_ecc. */
-	if (nand->page256) {
-		if (!(ofs & 0x8))
-			ofs += 0x100;
-		else
-			ofs -= 0x8;
-	}
-
-	/* issue the Serial Data In command to initial the Page Program process */
-	NanD_Command(nand, NAND_CMD_SEQIN);
-	if (nand->bus16) {
-		NanD_Address(nand, ADDR_COLUMN_PAGE,
-			     ((ofs >> nand->page_shift) << nand->page_shift) +
-				((ofs & (nand->oobblock - 1)) >> 1));
-	} else {
-		NanD_Address(nand, ADDR_COLUMN_PAGE, ofs);
-	}
-
-	/* treat crossing 8-byte OOB data for 2M x 8bit devices */
-	/* Note: datasheet says it should automaticaly wrap to the */
-	/*       next OOB block, but it didn't work here. mf.      */
-	if (nand->page256 && ofs + len > (ofs | 0x7) + 1) {
-		len256 = (ofs | 0x7) + 1 - ofs;
-		for (i = 0; i < len256; i++)
-			WRITE_NAND(buf[i], nandptr);
-
-		NanD_Command(nand, NAND_CMD_PAGEPROG);
-		NanD_Command(nand, NAND_CMD_STATUS);
-#ifdef NAND_NO_RB
-		{ u_char ret_val;
-			do {
-				ret_val = READ_NAND(nandptr); /* wait till ready */
-			} while ((ret_val & 0x40) != 0x40);
-		}
-#endif
-		if (READ_NAND(nandptr) & 1) {
-			puts ("Error programming oob data\n");
-			/* There was an error */
-			NAND_DISABLE_CE(nand);  /* set pin high */
-			*retlen = 0;
-			return -1;
-		}
-		NanD_Command(nand, NAND_CMD_SEQIN);
-		NanD_Address(nand, ADDR_COLUMN_PAGE, ofs & (~0x1ff));
-	}
-
-	if (nand->bus16) {
-		for (i = len256; i < len; i += 2) {
-			WRITE_NAND(buf[i] + (buf[i+1] << 8), nandptr);
-		}
-	} else {
-		for (i = len256; i < len; i++)
-			WRITE_NAND(buf[i], nandptr);
-	}
-
-	NanD_Command(nand, NAND_CMD_PAGEPROG);
-	NanD_Command(nand, NAND_CMD_STATUS);
-#ifdef NAND_NO_RB
-	{	u_char ret_val;
-		do {
-			ret_val = READ_NAND(nandptr); /* wait till ready */
-		} while ((ret_val & 0x40) != 0x40);
-	}
-#endif
-	if (READ_NAND(nandptr) & 1) {
-		puts ("Error programming oob data\n");
-		/* There was an error */
-		NAND_DISABLE_CE(nand);  /* set pin high */
-		*retlen = 0;
-		return -1;
-	}
-
-	NAND_DISABLE_CE(nand);  /* set pin high */
-	*retlen = len;
-	return 0;
-
-}
-
-int nand_legacy_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean)
-{
-	/* This is defined as a structure so it will work on any system
-	 * using native endian jffs2 (the default).
-	 */
-	static struct jffs2_unknown_node clean_marker = {
-		JFFS2_MAGIC_BITMASK,
-		JFFS2_NODETYPE_CLEANMARKER,
-		8		/* 8 bytes in this node */
-	};
-	unsigned long nandptr;
-	struct Nand *mychip;
-	int ret = 0;
-
-	if (ofs & (nand->erasesize-1) || len & (nand->erasesize-1)) {
-		printf ("Offset and size must be sector aligned, erasesize = %d\n",
-			(int) nand->erasesize);
-		return -1;
-	}
-
-	nandptr = nand->IO_ADDR;
-
-	/* Select the NAND device */
-#ifdef CONFIG_OMAP1510
-	archflashwp(0,0);
-#endif
-#ifdef CONFIG_SYS_NAND_WP
-	NAND_WP_OFF();
-#endif
-    NAND_ENABLE_CE(nand);  /* set pin low */
-
-	/* Check the WP bit */
-	NanD_Command(nand, NAND_CMD_STATUS);
-	if (!(READ_NAND(nand->IO_ADDR) & 0x80)) {
-		printf ("nand_write_ecc: Device is write protected!!!\n");
-		ret = -1;
-		goto out;
-	}
-
-	/* Check the WP bit */
-	NanD_Command(nand, NAND_CMD_STATUS);
-	if (!(READ_NAND(nand->IO_ADDR) & 0x80)) {
-		printf ("%s: Device is write protected!!!\n", __FUNCTION__);
-		ret = -1;
-		goto out;
-	}
-
-	/* FIXME: Do nand in the background. Use timers or schedule_task() */
-	while(len) {
-		/*mychip = &nand->chips[shr(ofs, nand->chipshift)];*/
-		mychip = &nand->chips[ofs >> nand->chipshift];
-
-		/* always check for bad block first, genuine bad blocks
-		 * should _never_  be erased.
-		 */
-		if (ALLOW_ERASE_BAD_DEBUG || !check_block(nand, ofs)) {
-			/* Select the NAND device */
-			NAND_ENABLE_CE(nand);  /* set pin low */
-
-			NanD_Command(nand, NAND_CMD_ERASE1);
-			NanD_Address(nand, ADDR_PAGE, ofs);
-			NanD_Command(nand, NAND_CMD_ERASE2);
-
-			NanD_Command(nand, NAND_CMD_STATUS);
-
-#ifdef NAND_NO_RB
-			{	u_char ret_val;
-				do {
-					ret_val = READ_NAND(nandptr); /* wait till ready */
-				} while ((ret_val & 0x40) != 0x40);
-			}
-#endif
-			if (READ_NAND(nandptr) & 1) {
-				printf ("%s: Error erasing at 0x%lx\n",
-					__FUNCTION__, (long)ofs);
-				/* There was an error */
-				ret = -1;
-				goto out;
-			}
-			if (clean) {
-				int n;	/* return value not used */
-				int p, l;
-
-				/* clean marker position and size depend
-				 * on the page size, since 256 byte pages
-				 * only have 8 bytes of oob data
-				 */
-				if (nand->page256) {
-					p = NAND_JFFS2_OOB8_FSDAPOS;
-					l = NAND_JFFS2_OOB8_FSDALEN;
-				} else {
-					p = NAND_JFFS2_OOB16_FSDAPOS;
-					l = NAND_JFFS2_OOB16_FSDALEN;
-				}
-
-				ret = nand_write_oob(nand, ofs + p, l, (size_t *)&n,
-						     (u_char *)&clean_marker);
-				/* quit here if write failed */
-				if (ret)
-					goto out;
-			}
-		}
-		ofs += nand->erasesize;
-		len -= nand->erasesize;
-	}
-
-out:
-	/* De-select the NAND device */
-	NAND_DISABLE_CE(nand);  /* set pin high */
-#ifdef CONFIG_OMAP1510
-	archflashwp(0,1);
-#endif
-#ifdef CONFIG_SYS_NAND_WP
-	NAND_WP_ON();
-#endif
-
-	return ret;
-}
-
-
-static inline int nandcheck(unsigned long potential, unsigned long physadr)
-{
-	return 0;
-}
-
-unsigned long nand_probe(unsigned long physadr)
-{
-	struct nand_chip *nand = NULL;
-	int i = 0, ChipID = 1;
-
-#ifdef CONFIG_MTD_NAND_ECC_JFFS2
-	oob_config.ecc_pos[0] = NAND_JFFS2_OOB_ECCPOS0;
-	oob_config.ecc_pos[1] = NAND_JFFS2_OOB_ECCPOS1;
-	oob_config.ecc_pos[2] = NAND_JFFS2_OOB_ECCPOS2;
-	oob_config.ecc_pos[3] = NAND_JFFS2_OOB_ECCPOS3;
-	oob_config.ecc_pos[4] = NAND_JFFS2_OOB_ECCPOS4;
-	oob_config.ecc_pos[5] = NAND_JFFS2_OOB_ECCPOS5;
-	oob_config.eccvalid_pos = 4;
-#else
-	oob_config.ecc_pos[0] = NAND_NOOB_ECCPOS0;
-	oob_config.ecc_pos[1] = NAND_NOOB_ECCPOS1;
-	oob_config.ecc_pos[2] = NAND_NOOB_ECCPOS2;
-	oob_config.ecc_pos[3] = NAND_NOOB_ECCPOS3;
-	oob_config.ecc_pos[4] = NAND_NOOB_ECCPOS4;
-	oob_config.ecc_pos[5] = NAND_NOOB_ECCPOS5;
-	oob_config.eccvalid_pos = NAND_NOOB_ECCVPOS;
-#endif
-	oob_config.badblock_pos = 5;
-
-	for (i=0; i<CONFIG_SYS_MAX_NAND_DEVICE; i++) {
-		if (nand_dev_desc[i].ChipID == NAND_ChipID_UNKNOWN) {
-			nand = &nand_dev_desc[i];
-			break;
-		}
-	}
-	if (!nand)
-		return (0);
-
-	memset((char *)nand, 0, sizeof(struct nand_chip));
-
-	nand->IO_ADDR = physadr;
-	nand->cache_page = -1;  /* init the cache page */
-	NanD_ScanChips(nand);
-
-	if (nand->totlen == 0) {
-		/* no chips found, clean up and quit */
-		memset((char *)nand, 0, sizeof(struct nand_chip));
-		nand->ChipID = NAND_ChipID_UNKNOWN;
-		return (0);
-	}
-
-	nand->ChipID = ChipID;
-	if (curr_device == -1)
-		curr_device = i;
-
-	nand->data_buf = malloc (nand->oobblock + nand->oobsize);
-	if (!nand->data_buf) {
-		puts ("Cannot allocate memory for data structures.\n");
-		return (0);
-	}
-
-	return (nand->totlen);
-}
-
-#ifdef CONFIG_MTD_NAND_ECC
-/*
- * Pre-calculated 256-way 1 byte column parity
- */
-static const u_char nand_ecc_precalc_table[] = {
-	0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
-	0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
-	0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
-	0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
-	0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
-	0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
-	0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
-	0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
-	0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
-	0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
-	0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
-	0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
-	0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
-	0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
-	0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
-	0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
-	0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
-	0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
-	0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
-	0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
-	0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
-	0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
-	0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
-	0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
-	0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
-	0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
-	0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
-	0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
-	0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
-	0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
-	0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
-	0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
-};
-
-
-/*
- * Creates non-inverted ECC code from line parity
- */
-static void nand_trans_result(u_char reg2, u_char reg3,
-	u_char *ecc_code)
-{
-	u_char a, b, i, tmp1, tmp2;
-
-	/* Initialize variables */
-	a = b = 0x80;
-	tmp1 = tmp2 = 0;
-
-	/* Calculate first ECC byte */
-	for (i = 0; i < 4; i++) {
-		if (reg3 & a)		/* LP15,13,11,9 --> ecc_code[0] */
-			tmp1 |= b;
-		b >>= 1;
-		if (reg2 & a)		/* LP14,12,10,8 --> ecc_code[0] */
-			tmp1 |= b;
-		b >>= 1;
-		a >>= 1;
-	}
-
-	/* Calculate second ECC byte */
-	b = 0x80;
-	for (i = 0; i < 4; i++) {
-		if (reg3 & a)		/* LP7,5,3,1 --> ecc_code[1] */
-			tmp2 |= b;
-		b >>= 1;
-		if (reg2 & a)		/* LP6,4,2,0 --> ecc_code[1] */
-			tmp2 |= b;
-		b >>= 1;
-		a >>= 1;
-	}
-
-	/* Store two of the ECC bytes */
-	ecc_code[0] = tmp1;
-	ecc_code[1] = tmp2;
-}
-
-/*
- * Calculate 3 byte ECC code for 256 byte block
- */
-static void nand_calculate_ecc (const u_char *dat, u_char *ecc_code)
-{
-	u_char idx, reg1, reg3;
-	int j;
-
-	/* Initialize variables */
-	reg1 = reg3 = 0;
-	ecc_code[0] = ecc_code[1] = ecc_code[2] = 0;
-
-	/* Build up column parity */
-	for(j = 0; j < 256; j++) {
-
-		/* Get CP0 - CP5 from table */
-		idx = nand_ecc_precalc_table[dat[j]];
-		reg1 ^= idx;
-
-		/* All bit XOR = 1 ? */
-		if (idx & 0x40) {
-			reg3 ^= (u_char) j;
-		}
-	}
-
-	/* Create non-inverted ECC code from line parity */
-	nand_trans_result((reg1 & 0x40) ? ~reg3 : reg3, reg3, ecc_code);
-
-	/* Calculate final ECC code */
-	ecc_code[0] = ~ecc_code[0];
-	ecc_code[1] = ~ecc_code[1];
-	ecc_code[2] = ((~reg1) << 2) | 0x03;
-}
-
-/*
- * Detect and correct a 1 bit error for 256 byte block
- */
-static int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc)
-{
-	u_char a, b, c, d1, d2, d3, add, bit, i;
-
-	/* Do error detection */
-	d1 = calc_ecc[0] ^ read_ecc[0];
-	d2 = calc_ecc[1] ^ read_ecc[1];
-	d3 = calc_ecc[2] ^ read_ecc[2];
-
-	if ((d1 | d2 | d3) == 0) {
-		/* No errors */
-		return 0;
-	} else {
-		a = (d1 ^ (d1 >> 1)) & 0x55;
-		b = (d2 ^ (d2 >> 1)) & 0x55;
-		c = (d3 ^ (d3 >> 1)) & 0x54;
-
-		/* Found and will correct single bit error in the data */
-		if ((a == 0x55) && (b == 0x55) && (c == 0x54)) {
-			c = 0x80;
-			add = 0;
-			a = 0x80;
-			for (i=0; i<4; i++) {
-				if (d1 & c)
-					add |= a;
-				c >>= 2;
-				a >>= 1;
-			}
-			c = 0x80;
-			for (i=0; i<4; i++) {
-				if (d2 & c)
-					add |= a;
-				c >>= 2;
-				a >>= 1;
-			}
-			bit = 0;
-			b = 0x04;
-			c = 0x80;
-			for (i=0; i<3; i++) {
-				if (d3 & c)
-					bit |= b;
-				c >>= 2;
-				b >>= 1;
-			}
-			b = 0x01;
-			a = dat[add];
-			a ^= (b << bit);
-			dat[add] = a;
-			return 1;
-		}
-		else {
-			i = 0;
-			while (d1) {
-				if (d1 & 0x01)
-					++i;
-				d1 >>= 1;
-			}
-			while (d2) {
-				if (d2 & 0x01)
-					++i;
-				d2 >>= 1;
-			}
-			while (d3) {
-				if (d3 & 0x01)
-					++i;
-				d3 >>= 1;
-			}
-			if (i == 1) {
-				/* ECC Code Error Correction */
-				read_ecc[0] = calc_ecc[0];
-				read_ecc[1] = calc_ecc[1];
-				read_ecc[2] = calc_ecc[2];
-				return 2;
-			}
-			else {
-				/* Uncorrectable Error */
-				return -1;
-			}
-		}
-	}
-
-	/* Should never happen */
-	return -1;
-}
-
-#endif
-
-#ifdef CONFIG_JFFS2_NAND
-int read_jffs2_nand(size_t start, size_t len,
-		size_t * retlen, u_char * buf, int nanddev)
-{
-	return nand_legacy_rw(nand_dev_desc + nanddev, NANDRW_READ | NANDRW_JFFS2,
-			start, len, retlen, buf);
-}
-#endif /* CONFIG_JFFS2_NAND */