Merge with git://www.denx.de/git/u-boot.git

1 files changed, 1915 insertions, 0 deletions

diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
new file mode 100644
index 0000000..4f61e36
--- /dev/null
+++ b/drivers/mtd/cfi_flash.c
@@ -0,0 +1,1915 @@
+/*
+ * (C) Copyright 2002-2004
+ * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
+ *
+ * Copyright (C) 2003 Arabella Software Ltd.
+ * Yuli Barcohen <yuli@arabellasw.com>
+ *
+ * Copyright (C) 2004
+ * Ed Okerson
+ *
+ * Copyright (C) 2006
+ * Tolunay Orkun <listmember@orkun.us>
+ *
+ * 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
+ *
+ */
+
+/* The DEBUG define must be before common to enable debugging */
+/* #define DEBUG	*/
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <environment.h>
+#ifdef	CFG_FLASH_CFI_DRIVER
+
+/*
+ * This file implements a Common Flash Interface (CFI) driver for
+ * U-Boot.
+ *
+ * The width of the port and the width of the chips are determined at
+ * initialization.  These widths are used to calculate the address for
+ * access CFI data structures.
+ *
+ * References
+ * JEDEC Standard JESD68 - Common Flash Interface (CFI)
+ * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
+ * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
+ * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
+ * AMD CFI Specification, Release 2.0 December 1, 2001
+ * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
+ *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
+ *
+ * Define CFG_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
+ * reading and writing ... (yes there is such a Hardware).
+ */
+
+#ifndef CFG_FLASH_BANKS_LIST
+#define CFG_FLASH_BANKS_LIST { CFG_FLASH_BASE }
+#endif
+
+#define FLASH_CMD_CFI			0x98
+#define FLASH_CMD_READ_ID		0x90
+#define FLASH_CMD_RESET			0xff
+#define FLASH_CMD_BLOCK_ERASE		0x20
+#define FLASH_CMD_ERASE_CONFIRM		0xD0
+#define FLASH_CMD_WRITE			0x40
+#define FLASH_CMD_PROTECT		0x60
+#define FLASH_CMD_PROTECT_SET		0x01
+#define FLASH_CMD_PROTECT_CLEAR		0xD0
+#define FLASH_CMD_CLEAR_STATUS		0x50
+#define FLASH_CMD_WRITE_TO_BUFFER	0xE8
+#define FLASH_CMD_WRITE_BUFFER_CONFIRM	0xD0
+
+#define FLASH_STATUS_DONE		0x80
+#define FLASH_STATUS_ESS		0x40
+#define FLASH_STATUS_ECLBS		0x20
+#define FLASH_STATUS_PSLBS		0x10
+#define FLASH_STATUS_VPENS		0x08
+#define FLASH_STATUS_PSS		0x04
+#define FLASH_STATUS_DPS		0x02
+#define FLASH_STATUS_R			0x01
+#define FLASH_STATUS_PROTECT		0x01
+
+#define AMD_CMD_RESET			0xF0
+#define AMD_CMD_WRITE			0xA0
+#define AMD_CMD_ERASE_START		0x80
+#define AMD_CMD_ERASE_SECTOR		0x30
+#define AMD_CMD_UNLOCK_START		0xAA
+#define AMD_CMD_UNLOCK_ACK		0x55
+#define AMD_CMD_WRITE_TO_BUFFER		0x25
+#define AMD_CMD_WRITE_BUFFER_CONFIRM	0x29
+
+#define AMD_STATUS_TOGGLE		0x40
+#define AMD_STATUS_ERROR		0x20
+
+#define FLASH_OFFSET_MANUFACTURER_ID	0x00
+#define FLASH_OFFSET_DEVICE_ID		0x01
+#define FLASH_OFFSET_DEVICE_ID2		0x0E
+#define FLASH_OFFSET_DEVICE_ID3		0x0F
+#define FLASH_OFFSET_CFI		0x55
+#define FLASH_OFFSET_CFI_ALT		0x555
+#define FLASH_OFFSET_CFI_RESP		0x10
+#define FLASH_OFFSET_PRIMARY_VENDOR	0x13
+/* extended query table primary address */
+#define FLASH_OFFSET_EXT_QUERY_T_P_ADDR	0x15
+#define FLASH_OFFSET_WTOUT		0x1F
+#define FLASH_OFFSET_WBTOUT		0x20
+#define FLASH_OFFSET_ETOUT		0x21
+#define FLASH_OFFSET_CETOUT		0x22
+#define FLASH_OFFSET_WMAX_TOUT		0x23
+#define FLASH_OFFSET_WBMAX_TOUT		0x24
+#define FLASH_OFFSET_EMAX_TOUT		0x25
+#define FLASH_OFFSET_CEMAX_TOUT		0x26
+#define FLASH_OFFSET_SIZE		0x27
+#define FLASH_OFFSET_INTERFACE		0x28
+#define FLASH_OFFSET_BUFFER_SIZE	0x2A
+#define FLASH_OFFSET_NUM_ERASE_REGIONS	0x2C
+#define FLASH_OFFSET_ERASE_REGIONS	0x2D
+#define FLASH_OFFSET_PROTECT		0x02
+#define FLASH_OFFSET_USER_PROTECTION	0x85
+#define FLASH_OFFSET_INTEL_PROTECTION	0x81
+
+#define CFI_CMDSET_NONE			0
+#define CFI_CMDSET_INTEL_EXTENDED	1
+#define CFI_CMDSET_AMD_STANDARD		2
+#define CFI_CMDSET_INTEL_STANDARD	3
+#define CFI_CMDSET_AMD_EXTENDED		4
+#define CFI_CMDSET_MITSU_STANDARD	256
+#define CFI_CMDSET_MITSU_EXTENDED	257
+#define CFI_CMDSET_SST			258
+
+#ifdef CFG_FLASH_CFI_AMD_RESET /* needed for STM_ID_29W320DB on UC100 */
+# undef  FLASH_CMD_RESET
+# define FLASH_CMD_RESET	AMD_CMD_RESET /* use AMD-Reset instead */
+#endif
+
+typedef union {
+	unsigned char c;
+	unsigned short w;
+	unsigned long l;
+	unsigned long long ll;
+} cfiword_t;
+
+#define NUM_ERASE_REGIONS	4 /* max. number of erase regions */
+
+static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
+
+/* use CFG_MAX_FLASH_BANKS_DETECT if defined */
+#ifdef CFG_MAX_FLASH_BANKS_DETECT
+static ulong bank_base[CFG_MAX_FLASH_BANKS_DETECT] = CFG_FLASH_BANKS_LIST;
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS_DETECT];	/* FLASH chips info */
+#else
+static ulong bank_base[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS_LIST;
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];		/* FLASH chips info */
+#endif
+
+/*
+ * Check if chip width is defined. If not, start detecting with 8bit.
+ */
+#ifndef CFG_FLASH_CFI_WIDTH
+#define CFG_FLASH_CFI_WIDTH	FLASH_CFI_8BIT
+#endif
+
+typedef unsigned long flash_sect_t;
+
+/* CFI standard query structure */
+struct cfi_qry {
+	u8	qry[3];
+	u16	p_id;
+	u16	p_adr;
+	u16	a_id;
+	u16	a_adr;
+	u8	vcc_min;
+	u8	vcc_max;
+	u8	vpp_min;
+	u8	vpp_max;
+	u8	word_write_timeout_typ;
+	u8	buf_write_timeout_typ;
+	u8	block_erase_timeout_typ;
+	u8	chip_erase_timeout_typ;
+	u8	word_write_timeout_max;
+	u8	buf_write_timeout_max;
+	u8	block_erase_timeout_max;
+	u8	chip_erase_timeout_max;
+	u8	dev_size;
+	u16	interface_desc;
+	u16	max_buf_write_size;
+	u8	num_erase_regions;
+	u32	erase_region_info[NUM_ERASE_REGIONS];
+} __attribute__((packed));
+
+struct cfi_pri_hdr {
+	u8	pri[3];
+	u8	major_version;
+	u8	minor_version;
+} __attribute__((packed));
+
+static void flash_write8(u8 value, void *addr)
+{
+	__raw_writeb(value, addr);
+}
+
+static void flash_write16(u16 value, void *addr)
+{
+	__raw_writew(value, addr);
+}
+
+static void flash_write32(u32 value, void *addr)
+{
+	__raw_writel(value, addr);
+}
+
+static void flash_write64(u64 value, void *addr)
+{
+	/* No architectures currently implement __raw_writeq() */
+	*(volatile u64 *)addr = value;
+}
+
+static u8 flash_read8(void *addr)
+{
+	return __raw_readb(addr);
+}
+
+static u16 flash_read16(void *addr)
+{
+	return __raw_readw(addr);
+}
+
+static u32 flash_read32(void *addr)
+{
+	return __raw_readl(addr);
+}
+
+static u64 flash_read64(void *addr)
+{
+	/* No architectures currently implement __raw_readq() */
+	return *(volatile u64 *)addr;
+}
+
+/*-----------------------------------------------------------------------
+ */
+#if defined(CFG_ENV_IS_IN_FLASH) || defined(CFG_ENV_ADDR_REDUND) || (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
+static flash_info_t *flash_get_info(ulong base)
+{
+	int i;
+	flash_info_t * info = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		info = & flash_info[i];
+		if (info->size && info->start[0] <= base &&
+		    base <= info->start[0] + info->size - 1)
+			break;
+	}
+
+	return i == CFG_MAX_FLASH_BANKS ? 0 : info;
+}
+#endif
+
+unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
+{
+	if (sect != (info->sector_count - 1))
+		return info->start[sect + 1] - info->start[sect];
+	else
+		return info->start[0] + info->size - info->start[sect];
+}
+
+/*-----------------------------------------------------------------------
+ * create an address based on the offset and the port width
+ */
+static inline void *
+flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
+{
+	unsigned int byte_offset = offset * info->portwidth;
+
+	return map_physmem(info->start[sect] + byte_offset,
+			flash_sector_size(info, sect) - byte_offset,
+			MAP_NOCACHE);
+}
+
+static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
+		unsigned int offset, void *addr)
+{
+	unsigned int byte_offset = offset * info->portwidth;
+
+	unmap_physmem(addr, flash_sector_size(info, sect) - byte_offset);
+}
+
+/*-----------------------------------------------------------------------
+ * make a proper sized command based on the port and chip widths
+ */
+static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
+{
+	int i;
+	uchar *cp = (uchar *) cmdbuf;
+
+#if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
+	for (i = info->portwidth; i > 0; i--)
+#else
+	for (i = 1; i <= info->portwidth; i++)
+#endif
+		*cp++ = (i & (info->chipwidth - 1)) ? '\0' : cmd;
+}
+
+#ifdef DEBUG
+/*-----------------------------------------------------------------------
+ * Debug support
+ */
+static void print_longlong (char *str, unsigned long long data)
+{
+	int i;
+	char *cp;
+
+	cp = (unsigned char *) &data;
+	for (i = 0; i < 8; i++)
+		sprintf (&str[i * 2], "%2.2x", *cp++);
+}
+
+static void flash_printqry (struct cfi_qry *qry)
+{
+	u8 *p = (u8 *)qry;
+	int x, y;
+
+	for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
+		debug("%02x : ", x);
+		for (y = 0; y < 16; y++)
+			debug("%2.2x ", p[x + y]);
+		debug(" ");
+		for (y = 0; y < 16; y++) {
+			unsigned char c = p[x + y];
+			if (c >= 0x20 && c <= 0x7e)
+				debug("%c", c);
+			else
+				debug(".");
+		}
+		debug("\n");
+	}
+}
+#endif
+
+
+/*-----------------------------------------------------------------------
+ * read a character at a port width address
+ */
+static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
+{
+	uchar *cp;
+	uchar retval;
+
+	cp = flash_map (info, 0, offset);
+#if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
+	retval = flash_read8(cp);
+#else
+	retval = flash_read8(cp + info->portwidth - 1);
+#endif
+	flash_unmap (info, 0, offset, cp);
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ * read a long word by picking the least significant byte of each maximum
+ * port size word. Swap for ppc format.
+ */
+static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
+			      uint offset)
+{
+	uchar *addr;
+	ulong retval;
+
+#ifdef DEBUG
+	int x;
+#endif
+	addr = flash_map (info, sect, offset);
+
+#ifdef DEBUG
+	debug ("long addr is at %p info->portwidth = %d\n", addr,
+	       info->portwidth);
+	for (x = 0; x < 4 * info->portwidth; x++) {
+		debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
+	}
+#endif
+#if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
+	retval = ((flash_read8(addr) << 16) |
+		  (flash_read8(addr + info->portwidth) << 24) |
+		  (flash_read8(addr + 2 * info->portwidth)) |
+		  (flash_read8(addr + 3 * info->portwidth) << 8));
+#else
+	retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
+		  (flash_read8(addr + info->portwidth - 1) << 16) |
+		  (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
+		  (flash_read8(addr + 3 * info->portwidth - 1)));
+#endif
+	flash_unmap(info, sect, offset, addr);
+
+	return retval;
+}
+
+/*
+ * Write a proper sized command to the correct address
+ */
+static void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
+			     uint offset, uchar cmd)
+{
+
+	void *addr;
+	cfiword_t cword;
+
+	addr = flash_map (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
+		       cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		flash_write8(cword.c, addr);
+		break;
+	case FLASH_CFI_16BIT:
+		debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
+		       cmd, cword.w,
+		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		flash_write16(cword.w, addr);
+		break;
+	case FLASH_CFI_32BIT:
+		debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
+		       cmd, cword.l,
+		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		flash_write32(cword.l, addr);
+		break;
+	case FLASH_CFI_64BIT:
+#ifdef DEBUG
+		{
+			char str[20];
+
+			print_longlong (str, cword.ll);
+
+			debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
+			       addr, cmd, str,
+			       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		}
+#endif
+		flash_write64(cword.ll, addr);
+		break;
+	}
+
+	/* Ensure all the instructions are fully finished */
+	sync();
+
+	flash_unmap(info, sect, offset, addr);
+}
+
+static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
+{
+	flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
+	flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isequal (flash_info_t * info, flash_sect_t sect,
+			  uint offset, uchar cmd)
+{
+	void *addr;
+	cfiword_t cword;
+	int retval;
+
+	addr = flash_map (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+
+	debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		debug ("is= %x %x\n", flash_read8(addr), cword.c);
+		retval = (flash_read8(addr) == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
+		retval = (flash_read16(addr) == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		debug ("is= %8.8lx %8.8lx\n", flash_read32(addr), cword.l);
+		retval = (flash_read32(addr) == cword.l);
+		break;
+	case FLASH_CFI_64BIT:
+#ifdef DEBUG
+		{
+			char str1[20];
+			char str2[20];
+
+			print_longlong (str1, flash_read64(addr));
+			print_longlong (str2, cword.ll);
+			debug ("is= %s %s\n", str1, str2);
+		}
+#endif
+		retval = (flash_read64(addr) == cword.ll);
+		break;
+	default:
+		retval = 0;
+		break;
+	}
+	flash_unmap(info, sect, offset, addr);
+
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isset (flash_info_t * info, flash_sect_t sect,
+			uint offset, uchar cmd)
+{
+	void *addr;
+	cfiword_t cword;
+	int retval;
+
+	addr = flash_map (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		retval = ((flash_read8(addr) & cword.c) == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		retval = ((flash_read16(addr) & cword.w) == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		retval = ((flash_read32(addr) & cword.l) == cword.l);
+		break;
+	case FLASH_CFI_64BIT:
+		retval = ((flash_read64(addr) & cword.ll) == cword.ll);
+		break;
+	default:
+		retval = 0;
+		break;
+	}
+	flash_unmap(info, sect, offset, addr);
+
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_toggle (flash_info_t * info, flash_sect_t sect,
+			 uint offset, uchar cmd)
+{
+	void *addr;
+	cfiword_t cword;
+	int retval;
+
+	addr = flash_map (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		retval = ((flash_read8(addr) & cword.c) !=
+			  (flash_read8(addr) & cword.c));
+		break;
+	case FLASH_CFI_16BIT:
+		retval = ((flash_read16(addr) & cword.w) !=
+			  (flash_read16(addr) & cword.w));
+		break;
+	case FLASH_CFI_32BIT:
+		retval = ((flash_read32(addr) & cword.l) !=
+			  (flash_read32(addr) & cword.l));
+		break;
+	case FLASH_CFI_64BIT:
+		retval = ((flash_read64(addr) & cword.ll) !=
+			  (flash_read64(addr) & cword.ll));
+		break;
+	default:
+		retval = 0;
+		break;
+	}
+	flash_unmap(info, sect, offset, addr);
+
+	return retval;
+}
+
+/*
+ * flash_is_busy - check to see if the flash is busy
+ *
+ * This routine checks the status of the chip and returns true if the
+ * chip is busy.
+ */
+static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
+{
+	int retval;
+
+	switch (info->vendor) {
+	case CFI_CMDSET_INTEL_STANDARD:
+	case CFI_CMDSET_INTEL_EXTENDED:
+		retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
+		break;
+	case CFI_CMDSET_AMD_STANDARD:
+	case CFI_CMDSET_AMD_EXTENDED:
+#ifdef CONFIG_FLASH_CFI_LEGACY
+	case CFI_CMDSET_AMD_LEGACY:
+#endif
+		retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
+		break;
+	default:
+		retval = 0;
+	}
+	debug ("flash_is_busy: %d\n", retval);
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ *  wait for XSR.7 to be set. Time out with an error if it does not.
+ *  This routine does not set the flash to read-array mode.
+ */
+static int flash_status_check (flash_info_t * info, flash_sect_t sector,
+			       ulong tout, char *prompt)
+{
+	ulong start;
+
+#if CFG_HZ != 1000
+	tout *= CFG_HZ/1000;
+#endif
+
+	/* Wait for command completion */
+	start = get_timer (0);
+	while (flash_is_busy (info, sector)) {
+		if (get_timer (start) > tout) {
+			printf ("Flash %s timeout at address %lx data %lx\n",
+				prompt, info->start[sector],
+				flash_read_long (info, sector, 0));
+			flash_write_cmd (info, sector, 0, info->cmd_reset);
+			return ERR_TIMOUT;
+		}
+		udelay (1);		/* also triggers watchdog */
+	}
+	return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * Wait for XSR.7 to be set, if it times out print an error, otherwise
+ * do a full status check.
+ *
+ * This routine sets the flash to read-array mode.
+ */
+static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
+				    ulong tout, char *prompt)
+{
+	int retcode;
+
+	retcode = flash_status_check (info, sector, tout, prompt);
+	switch (info->vendor) {
+	case CFI_CMDSET_INTEL_EXTENDED:
+	case CFI_CMDSET_INTEL_STANDARD:
+		if ((retcode == ERR_OK)
+		    && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
+			retcode = ERR_INVAL;
+			printf ("Flash %s error at address %lx\n", prompt,
+				info->start[sector]);
+			if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
+					 FLASH_STATUS_PSLBS)) {
+				puts ("Command Sequence Error.\n");
+			} else if (flash_isset (info, sector, 0,
+						FLASH_STATUS_ECLBS)) {
+				puts ("Block Erase Error.\n");
+				retcode = ERR_NOT_ERASED;
+			} else if (flash_isset (info, sector, 0,
+						FLASH_STATUS_PSLBS)) {
+				puts ("Locking Error\n");
+			}
+			if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
+				puts ("Block locked.\n");
+				retcode = ERR_PROTECTED;
+			}
+			if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
+				puts ("Vpp Low Error.\n");
+		}
+		flash_write_cmd (info, sector, 0, info->cmd_reset);
+		break;
+	default:
+		break;
+	}
+	return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
+{
+#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
+	unsigned short	w;
+	unsigned int	l;
+	unsigned long long ll;
+#endif
+
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		cword->c = c;
+		break;
+	case FLASH_CFI_16BIT:
+#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
+		w = c;
+		w <<= 8;
+		cword->w = (cword->w >> 8) | w;
+#else
+		cword->w = (cword->w << 8) | c;
+#endif
+		break;
+	case FLASH_CFI_32BIT:
+#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
+		l = c;
+		l <<= 24;
+		cword->l = (cword->l >> 8) | l;
+#else
+		cword->l = (cword->l << 8) | c;
+#endif
+		break;
+	case FLASH_CFI_64BIT:
+#if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
+		ll = c;
+		ll <<= 56;
+		cword->ll = (cword->ll >> 8) | ll;
+#else
+		cword->ll = (cword->ll << 8) | c;
+#endif
+		break;
+	}
+}
+
+/* loop through the sectors from the highest address when the passed
+ * address is greater or equal to the sector address we have a match
+ */
+static flash_sect_t find_sector (flash_info_t * info, ulong addr)
+{
+	flash_sect_t sector;
+
+	for (sector = info->sector_count - 1; sector >= 0; sector--) {
+		if (addr >= info->start[sector])
+			break;
+	}
+	return sector;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_write_cfiword (flash_info_t * info, ulong dest,
+				cfiword_t cword)
+{
+	void *dstaddr;
+	int flag;
+
+	dstaddr = map_physmem(dest, info->portwidth, MAP_NOCACHE);
+
+	/* Check if Flash is (sufficiently) erased */
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
+		break;
+	case FLASH_CFI_64BIT:
+		flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
+		break;
+	default:
+		flag = 0;
+		break;
+	}
+	if (!flag) {
+		unmap_physmem(dstaddr, info->portwidth);
+		return ERR_NOT_ERASED;
+	}
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	switch (info->vendor) {
+	case CFI_CMDSET_INTEL_EXTENDED:
+	case CFI_CMDSET_INTEL_STANDARD:
+		flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
+		flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
+		break;
+	case CFI_CMDSET_AMD_EXTENDED:
+	case CFI_CMDSET_AMD_STANDARD:
+#ifdef CONFIG_FLASH_CFI_LEGACY
+	case CFI_CMDSET_AMD_LEGACY:
+#endif
+		flash_unlock_seq (info, 0);
+		flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
+		break;
+	}
+
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		flash_write8(cword.c, dstaddr);
+		break;
+	case FLASH_CFI_16BIT:
+		flash_write16(cword.w, dstaddr);
+		break;
+	case FLASH_CFI_32BIT:
+		flash_write32(cword.l, dstaddr);
+		break;
+	case FLASH_CFI_64BIT:
+		flash_write64(cword.ll, dstaddr);
+		break;
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts ();
+
+	unmap_physmem(dstaddr, info->portwidth);
+
+	return flash_full_status_check (info, find_sector (info, dest),
+					info->write_tout, "write");
+}
+
+#ifdef CFG_FLASH_USE_BUFFER_WRITE
+
+static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
+				  int len)
+{
+	flash_sect_t sector;
+	int cnt;
+	int retcode;
+	void *src = cp;
+	void *dst = map_physmem(dest, len, MAP_NOCACHE);
+	void *dst2 = dst;
+	int flag = 0;
+
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		cnt = len;
+		break;
+	case FLASH_CFI_16BIT:
+		cnt = len >> 1;
+		break;
+	case FLASH_CFI_32BIT:
+		cnt = len >> 2;
+		break;
+	case FLASH_CFI_64BIT:
+		cnt = len >> 3;
+		break;
+	default:
+		retcode = ERR_INVAL;
+		goto out_unmap;
+	}
+
+	while ((cnt-- > 0) && (flag == 0)) {
+		switch (info->portwidth) {
+		case FLASH_CFI_8BIT:
+			flag = ((flash_read8(dst2) & flash_read8(src)) ==
+				flash_read8(src));
+			src += 1, dst2 += 1;
+			break;
+		case FLASH_CFI_16BIT:
+			flag = ((flash_read16(dst2) & flash_read16(src)) ==
+				flash_read16(src));
+			src += 2, dst2 += 2;
+			break;
+		case FLASH_CFI_32BIT:
+			flag = ((flash_read32(dst2) & flash_read32(src)) ==
+				flash_read32(src));
+			src += 4, dst2 += 4;
+			break;
+		case FLASH_CFI_64BIT:
+			flag = ((flash_read64(dst2) & flash_read64(src)) ==
+				flash_read64(src));
+			src += 8, dst2 += 8;
+			break;
+		}
+	}
+	if (!flag) {
+		retcode = ERR_NOT_ERASED;
+		goto out_unmap;
+	}
+
+	src = cp;
+	sector = find_sector (info, dest);
+
+	switch (info->vendor) {
+	case CFI_CMDSET_INTEL_STANDARD:
+	case CFI_CMDSET_INTEL_EXTENDED:
+		flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+		flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
+		retcode = flash_status_check (info, sector,
+					      info->buffer_write_tout,
+					      "write to buffer");
+		if (retcode == ERR_OK) {
+			/* reduce the number of loops by the width of
+			 * the port */
+			switch (info->portwidth) {
+			case FLASH_CFI_8BIT:
+				cnt = len;
+				break;
+			case FLASH_CFI_16BIT:
+				cnt = len >> 1;
+				break;
+			case FLASH_CFI_32BIT:
+				cnt = len >> 2;
+				break;
+			case FLASH_CFI_64BIT:
+				cnt = len >> 3;
+				break;
+			default:
+				retcode = ERR_INVAL;
+				goto out_unmap;
+			}
+			flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
+			while (cnt-- > 0) {
+				switch (info->portwidth) {
+				case FLASH_CFI_8BIT:
+					flash_write8(flash_read8(src), dst);
+					src += 1, dst += 1;
+					break;
+				case FLASH_CFI_16BIT:
+					flash_write16(flash_read16(src), dst);
+					src += 2, dst += 2;
+					break;
+				case FLASH_CFI_32BIT:
+					flash_write32(flash_read32(src), dst);
+					src += 4, dst += 4;
+					break;
+				case FLASH_CFI_64BIT:
+					flash_write64(flash_read64(src), dst);
+					src += 8, dst += 8;
+					break;
+				default:
+					retcode = ERR_INVAL;
+					goto out_unmap;
+				}
+			}
+			flash_write_cmd (info, sector, 0,
+					 FLASH_CMD_WRITE_BUFFER_CONFIRM);
+			retcode = flash_full_status_check (
+				info, sector, info->buffer_write_tout,
+				"buffer write");
+		}
+
+		break;
+
+	case CFI_CMDSET_AMD_STANDARD:
+	case CFI_CMDSET_AMD_EXTENDED:
+		flash_unlock_seq(info,0);
+		flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_TO_BUFFER);
+
+		switch (info->portwidth) {
+		case FLASH_CFI_8BIT:
+			cnt = len;
+			flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
+			while (cnt-- > 0) {
+				flash_write8(flash_read8(src), dst);
+				src += 1, dst += 1;
+			}
+			break;
+		case FLASH_CFI_16BIT:
+			cnt = len >> 1;
+			flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
+			while (cnt-- > 0) {
+				flash_write16(flash_read16(src), dst);
+				src += 2, dst += 2;
+			}
+			break;
+		case FLASH_CFI_32BIT:
+			cnt = len >> 2;
+			flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
+			while (cnt-- > 0) {
+				flash_write32(flash_read32(src), dst);
+				src += 4, dst += 4;
+			}
+			break;
+		case FLASH_CFI_64BIT:
+			cnt = len >> 3;
+			flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
+			while (cnt-- > 0) {
+				flash_write64(flash_read64(src), dst);
+				src += 8, dst += 8;
+			}
+			break;
+		default:
+			retcode = ERR_INVAL;
+			goto out_unmap;
+		}
+
+		flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
+		retcode = flash_full_status_check (info, sector,
+						   info->buffer_write_tout,
+						   "buffer write");
+		break;
+
+	default:
+		debug ("Unknown Command Set\n");
+		retcode = ERR_INVAL;
+		break;
+	}
+
+out_unmap:
+	unmap_physmem(dst, len);
+	return retcode;
+}
+#endif /* CFG_FLASH_USE_BUFFER_WRITE */
+
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int rcode = 0;
+	int prot;
+	flash_sect_t sect;
+
+	if (info->flash_id != FLASH_MAN_CFI) {
+		puts ("Can't erase unknown flash type - aborted\n");
+		return 1;
+	}
+	if ((s_first < 0) || (s_first > s_last)) {
+		puts ("- no sectors to erase\n");
+		return 1;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+	if (prot) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		putc ('\n');
+	}
+
+
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) { /* not protected */
+			switch (info->vendor) {
+			case CFI_CMDSET_INTEL_STANDARD:
+			case CFI_CMDSET_INTEL_EXTENDED:
+				flash_write_cmd (info, sect, 0,
+						 FLASH_CMD_CLEAR_STATUS);
+				flash_write_cmd (info, sect, 0,
+						 FLASH_CMD_BLOCK_ERASE);
+				flash_write_cmd (info, sect, 0,
+						 FLASH_CMD_ERASE_CONFIRM);
+				break;
+			case CFI_CMDSET_AMD_STANDARD:
+			case CFI_CMDSET_AMD_EXTENDED:
+				flash_unlock_seq (info, sect);
+				flash_write_cmd (info, sect,
+						info->addr_unlock1,
+						AMD_CMD_ERASE_START);
+				flash_unlock_seq (info, sect);
+				flash_write_cmd (info, sect, 0,
+						 AMD_CMD_ERASE_SECTOR);
+				break;
+#ifdef CONFIG_FLASH_CFI_LEGACY
+			case CFI_CMDSET_AMD_LEGACY:
+				flash_unlock_seq (info, 0);
+				flash_write_cmd (info, 0, info->addr_unlock1,
+						AMD_CMD_ERASE_START);
+				flash_unlock_seq (info, 0);
+				flash_write_cmd (info, sect, 0,
+						AMD_CMD_ERASE_SECTOR);
+				break;
+#endif
+			default:
+				debug ("Unkown flash vendor %d\n",
+				       info->vendor);
+				break;
+			}
+
+			if (flash_full_status_check
+			    (info, sect, info->erase_blk_tout, "erase")) {
+				rcode = 1;
+			} else
+				putc ('.');
+		}
+	}
+	puts (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	if (info->flash_id != FLASH_MAN_CFI) {
+		puts ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	printf ("%s FLASH (%d x %d)",
+		info->name,
+		(info->portwidth << 3), (info->chipwidth << 3));
+	if (info->size < 1024*1024)
+		printf ("  Size: %ld kB in %d Sectors\n",
+			info->size >> 10, info->sector_count);
+	else
+		printf ("  Size: %ld MB in %d Sectors\n",
+			info->size >> 20, info->sector_count);
+	printf ("  ");
+	switch (info->vendor) {
+		case CFI_CMDSET_INTEL_STANDARD:
+			printf ("Intel Standard");
+			break;
+		case CFI_CMDSET_INTEL_EXTENDED:
+			printf ("Intel Extended");
+			break;
+		case CFI_CMDSET_AMD_STANDARD:
+			printf ("AMD Standard");
+			break;
+		case CFI_CMDSET_AMD_EXTENDED:
+			printf ("AMD Extended");
+			break;
+#ifdef CONFIG_FLASH_CFI_LEGACY
+		case CFI_CMDSET_AMD_LEGACY:
+			printf ("AMD Legacy");
+			break;
+#endif
+		default:
+			printf ("Unknown (%d)", info->vendor);
+			break;
+	}
+	printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X",
+		info->manufacturer_id, info->device_id);
+	if (info->device_id == 0x7E) {
+		printf("%04X", info->device_id2);
+	}
+	printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
+		info->erase_blk_tout,
+		info->write_tout);
+	if (info->buffer_size > 1) {
+		printf ("  Buffer write timeout: %ld ms, "
+			"buffer size: %d bytes\n",
+		info->buffer_write_tout,
+		info->buffer_size);
+	}
+
+	puts ("\n  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; ++i) {
+		if ((i % 5) == 0)
+			printf ("\n");
+#ifdef CFG_FLASH_EMPTY_INFO
+		int k;
+		int size;
+		int erased;
+		volatile unsigned long *flash;
+
+		/*
+		 * Check if whole sector is erased
+		 */
+		size = flash_sector_size(info, i);
+		erased = 1;
+		flash = (volatile unsigned long *) info->start[i];
+		size = size >> 2;	/* divide by 4 for longword access */
+		for (k = 0; k < size; k++) {
+			if (*flash++ != 0xffffffff) {
+				erased = 0;
+				break;
+			}
+		}
+
+		/* print empty and read-only info */
+		printf ("  %08lX %c %s ",
+			info->start[i],
+			erased ? 'E' : ' ',
+			info->protect[i] ? "RO" : "  ");
+#else	/* ! CFG_FLASH_EMPTY_INFO */
+		printf ("  %08lX   %s ",
+			info->start[i],
+			info->protect[i] ? "RO" : "  ");
+#endif
+	}
+	putc ('\n');
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong wp;
+	uchar *p;
+	int aln;
+	cfiword_t cword;
+	int i, rc;
+
+#ifdef CFG_FLASH_USE_BUFFER_WRITE
+	int buffered_size;
+#endif
+	/* get lower aligned address */
+	wp = (addr & ~(info->portwidth - 1));
+
+	/* handle unaligned start */
+	if ((aln = addr - wp) != 0) {
+		cword.l = 0;
+		p = map_physmem(wp, info->portwidth, MAP_NOCACHE);
+		for (i = 0; i < aln; ++i)
+			flash_add_byte (info, &cword, flash_read8(p + i));
+
+		for (; (i < info->portwidth) && (cnt > 0); i++) {
+			flash_add_byte (info, &cword, *src++);
+			cnt--;
+		}
+		for (; (cnt == 0) && (i < info->portwidth); ++i)
+			flash_add_byte (info, &cword, flash_read8(p + i));
+
+		rc = flash_write_cfiword (info, wp, cword);
+		unmap_physmem(p, info->portwidth);
+		if (rc != 0)
+			return rc;
+
+		wp += i;
+	}
+
+	/* handle the aligned part */
+#ifdef CFG_FLASH_USE_BUFFER_WRITE
+	buffered_size = (info->portwidth / info->chipwidth);
+	buffered_size *= info->buffer_size;
+	while (cnt >= info->portwidth) {
+		/* prohibit buffer write when buffer_size is 1 */
+		if (info->buffer_size == 1) {
+			cword.l = 0;
+			for (i = 0; i < info->portwidth; i++)
+				flash_add_byte (info, &cword, *src++);
+			if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
+				return rc;
+			wp += info->portwidth;
+			cnt -= info->portwidth;
+			continue;
+		}
+
+		/* write buffer until next buffered_size aligned boundary */
+		i = buffered_size - (wp % buffered_size);
+		if (i > cnt)
+			i = cnt;
+		if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
+			return rc;
+		i -= i & (info->portwidth - 1);
+		wp += i;
+		src += i;
+		cnt -= i;
+	}
+#else
+	while (cnt >= info->portwidth) {
+		cword.l = 0;
+		for (i = 0; i < info->portwidth; i++) {
+			flash_add_byte (info, &cword, *src++);
+		}
+		if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
+			return rc;
+		wp += info->portwidth;
+		cnt -= info->portwidth;
+	}
+#endif /* CFG_FLASH_USE_BUFFER_WRITE */
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	cword.l = 0;
+	p = map_physmem(wp, info->portwidth, MAP_NOCACHE);
+	for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
+		flash_add_byte (info, &cword, *src++);
+		--cnt;
+	}
+	for (; i < info->portwidth; ++i)
+		flash_add_byte (info, &cword, flash_read8(p + i));
+	unmap_physmem(p, info->portwidth);
+
+	return flash_write_cfiword (info, wp, cword);
+}
+
+/*-----------------------------------------------------------------------
+ */
+#ifdef CFG_FLASH_PROTECTION
+
+int flash_real_protect (flash_info_t * info, long sector, int prot)
+{
+	int retcode = 0;
+
+	flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+	flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
+	if (prot)
+		flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
+	else
+		flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
+
+	if ((retcode =
+	     flash_full_status_check (info, sector, info->erase_blk_tout,
+				      prot ? "protect" : "unprotect")) == 0) {
+
+		info->protect[sector] = prot;
+
+		/*
+		 * On some of Intel's flash chips (marked via legacy_unlock)
+		 * unprotect unprotects all locking.
+		 */
+		if ((prot == 0) && (info->legacy_unlock)) {
+			flash_sect_t i;
+
+			for (i = 0; i < info->sector_count; i++) {
+				if (info->protect[i])
+					flash_real_protect (info, i, 1);
+			}
+		}
+	}
+	return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ * flash_read_user_serial - read the OneTimeProgramming cells
+ */
+void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
+			     int len)
+{
+	uchar *src;
+	uchar *dst;
+
+	dst = buffer;
+	src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
+	flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
+	memcpy (dst, src + offset, len);
+	flash_write_cmd (info, 0, 0, info->cmd_reset);
+	flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
+}
+
+/*
+ * flash_read_factory_serial - read the device Id from the protection area
+ */
+void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
+				int len)
+{
+	uchar *src;
+
+	src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
+	flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
+	memcpy (buffer, src + offset, len);
+	flash_write_cmd (info, 0, 0, info->cmd_reset);
+	flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
+}
+
+#endif /* CFG_FLASH_PROTECTION */
+
+/*-----------------------------------------------------------------------
+ * Reverse the order of the erase regions in the CFI QRY structure.
+ * This is needed for chips that are either a) correctly detected as
+ * top-boot, or b) buggy.
+ */
+static void cfi_reverse_geometry(struct cfi_qry *qry)
+{
+	unsigned int i, j;
+	u32 tmp;
+
+	for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
+		tmp = qry->erase_region_info[i];
+		qry->erase_region_info[i] = qry->erase_region_info[j];
+		qry->erase_region_info[j] = tmp;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ * read jedec ids from device and set corresponding fields in info struct
+ *
+ * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
+ *
+ */
+static void cmdset_intel_read_jedec_ids(flash_info_t *info)
+{
+	flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
+	flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
+	udelay(1000); /* some flash are slow to respond */
+	info->manufacturer_id = flash_read_uchar (info,
+					FLASH_OFFSET_MANUFACTURER_ID);
+	info->device_id = flash_read_uchar (info,
+					FLASH_OFFSET_DEVICE_ID);
+	flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
+}
+
+static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
+{
+	info->cmd_reset = FLASH_CMD_RESET;
+
+	cmdset_intel_read_jedec_ids(info);
+	flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
+
+#ifdef CFG_FLASH_PROTECTION
+	/* read legacy lock/unlock bit from intel flash */
+	if (info->ext_addr) {
+		info->legacy_unlock = flash_read_uchar (info,
+				info->ext_addr + 5) & 0x08;
+	}
+#endif
+
+	return 0;
+}
+
+static void cmdset_amd_read_jedec_ids(flash_info_t *info)
+{
+	flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
+	flash_unlock_seq(info, 0);
+	flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
+	udelay(1000); /* some flash are slow to respond */
+	info->manufacturer_id = flash_read_uchar (info,
+					FLASH_OFFSET_MANUFACTURER_ID);
+	info->device_id = flash_read_uchar (info,
+					FLASH_OFFSET_DEVICE_ID);
+	if (info->device_id == 0x7E) {
+		/* AMD 3-byte (expanded) device ids */
+		info->device_id2 = flash_read_uchar (info,
+					FLASH_OFFSET_DEVICE_ID2);
+		info->device_id2 <<= 8;
+		info->device_id2 |= flash_read_uchar (info,
+					FLASH_OFFSET_DEVICE_ID3);
+	}
+	flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
+}
+
+static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
+{
+	info->cmd_reset = AMD_CMD_RESET;
+
+	cmdset_amd_read_jedec_ids(info);
+	flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
+
+	return 0;
+}
+
+#ifdef CONFIG_FLASH_CFI_LEGACY
+static void flash_read_jedec_ids (flash_info_t * info)
+{
+	info->manufacturer_id = 0;
+	info->device_id       = 0;
+	info->device_id2      = 0;
+
+	switch (info->vendor) {
+	case CFI_CMDSET_INTEL_STANDARD:
+	case CFI_CMDSET_INTEL_EXTENDED:
+		flash_read_jedec_ids_intel(info);
+		break;
+	case CFI_CMDSET_AMD_STANDARD:
+	case CFI_CMDSET_AMD_EXTENDED:
+		flash_read_jedec_ids_amd(info);
+		break;
+	default:
+		break;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ * Call board code to request info about non-CFI flash.
+ * board_flash_get_legacy needs to fill in at least:
+ * info->portwidth, info->chipwidth and info->interface for Jedec probing.
+ */
+static int flash_detect_legacy(ulong base, int banknum)
+{
+	flash_info_t *info = &flash_info[banknum];
+
+	if (board_flash_get_legacy(base, banknum, info)) {
+		/* board code may have filled info completely. If not, we
+		   use JEDEC ID probing. */
+		if (!info->vendor) {
+			int modes[] = {
+				CFI_CMDSET_AMD_STANDARD,
+				CFI_CMDSET_INTEL_STANDARD
+			};
+			int i;
+
+			for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
+				info->vendor = modes[i];
+				info->start[0] = base;
+				if (info->portwidth == FLASH_CFI_8BIT
+					&& info->interface == FLASH_CFI_X8X16) {
+					info->addr_unlock1 = 0x2AAA;
+					info->addr_unlock2 = 0x5555;
+				} else {
+					info->addr_unlock1 = 0x5555;
+					info->addr_unlock2 = 0x2AAA;
+				}
+				flash_read_jedec_ids(info);
+				debug("JEDEC PROBE: ID %x %x %x\n",
+						info->manufacturer_id,
+						info->device_id,
+						info->device_id2);
+				if (jedec_flash_match(info, base))
+					break;
+			}
+		}
+
+		switch(info->vendor) {
+		case CFI_CMDSET_INTEL_STANDARD:
+		case CFI_CMDSET_INTEL_EXTENDED:
+			info->cmd_reset = FLASH_CMD_RESET;
+			break;
+		case CFI_CMDSET_AMD_STANDARD:
+		case CFI_CMDSET_AMD_EXTENDED:
+		case CFI_CMDSET_AMD_LEGACY:
+			info->cmd_reset = AMD_CMD_RESET;
+			break;
+		}
+		info->flash_id = FLASH_MAN_CFI;
+		return 1;
+	}
+	return 0; /* use CFI */
+}
+#else
+static inline int flash_detect_legacy(ulong base, int banknum)
+{
+	return 0; /* use CFI */
+}
+#endif
+
+/*-----------------------------------------------------------------------
+ * detect if flash is compatible with the Common Flash Interface (CFI)
+ * http://www.jedec.org/download/search/jesd68.pdf
+ */
+static void flash_read_cfi (flash_info_t *info, void *buf,
+		unsigned int start, size_t len)
+{
+	u8 *p = buf;
+	unsigned int i;
+
+	for (i = 0; i < len; i++)
+		p[i] = flash_read_uchar(info, start + i);
+}
+
+static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
+{
+	int cfi_offset;
+
+	flash_write_cmd (info, 0, 0, info->cmd_reset);
+	for (cfi_offset=0;
+	     cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
+	     cfi_offset++) {
+		flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
+				 FLASH_CMD_CFI);
+		if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
+		    && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
+		    && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
+			flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
+					sizeof(struct cfi_qry));
+			info->interface	= le16_to_cpu(qry->interface_desc);
+
+			info->cfi_offset = flash_offset_cfi[cfi_offset];
+			debug ("device interface is %d\n",
+			       info->interface);
+			debug ("found port %d chip %d ",
+			       info->portwidth, info->chipwidth);
+			debug ("port %d bits chip %d bits\n",
+			       info->portwidth << CFI_FLASH_SHIFT_WIDTH,
+			       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+
+			/* calculate command offsets as in the Linux driver */
+			info->addr_unlock1 = 0x555;
+			info->addr_unlock2 = 0x2aa;
+
+			/*
+			 * modify the unlock address if we are
+			 * in compatibility mode
+			 */
+			if (	/* x8/x16 in x8 mode */
+				((info->chipwidth == FLASH_CFI_BY8) &&
+					(info->interface == FLASH_CFI_X8X16)) ||
+				/* x16/x32 in x16 mode */
+				((info->chipwidth == FLASH_CFI_BY16) &&
+					(info->interface == FLASH_CFI_X16X32)))
+			{
+				info->addr_unlock1 = 0xaaa;
+				info->addr_unlock2 = 0x555;
+			}
+
+			info->name = "CFI conformant";
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
+{
+	debug ("flash detect cfi\n");
+
+	for (info->portwidth = CFG_FLASH_CFI_WIDTH;
+	     info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
+		for (info->chipwidth = FLASH_CFI_BY8;
+		     info->chipwidth <= info->portwidth;
+		     info->chipwidth <<= 1)
+			if (__flash_detect_cfi(info, qry))
+				return 1;
+	}
+	debug ("not found\n");
+	return 0;
+}
+
+/*
+ * Manufacturer-specific quirks. Add workarounds for geometry
+ * reversal, etc. here.
+ */
+static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
+{
+	/* check if flash geometry needs reversal */
+	if (qry->num_erase_regions > 1) {
+		/* reverse geometry if top boot part */
+		if (info->cfi_version < 0x3131) {
+			/* CFI < 1.1, try to guess from device id */
+			if ((info->device_id & 0x80) != 0)
+				cfi_reverse_geometry(qry);
+		} else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
+			/* CFI >= 1.1, deduct from top/bottom flag */
+			/* note: ext_addr is valid since cfi_version > 0 */
+			cfi_reverse_geometry(qry);
+		}
+	}
+}
+
+static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
+{
+	int reverse_geometry = 0;
+
+	/* Check the "top boot" bit in the PRI */
+	if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
+		reverse_geometry = 1;
+
+	/* AT49BV6416(T) list the erase regions in the wrong order.
+	 * However, the device ID is identical with the non-broken
+	 * AT49BV642D since u-boot only reads the low byte (they
+	 * differ in the high byte.) So leave out this fixup for now.
+	 */
+#if 0
+	if (info->device_id == 0xd6 || info->device_id == 0xd2)
+		reverse_geometry = !reverse_geometry;
+#endif
+
+	if (reverse_geometry)
+		cfi_reverse_geometry(qry);
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ *
+ */
+ulong flash_get_size (ulong base, int banknum)
+{
+	flash_info_t *info = &flash_info[banknum];
+	int i, j;
+	flash_sect_t sect_cnt;
+	unsigned long sector;
+	unsigned long tmp;
+	int size_ratio;
+	uchar num_erase_regions;
+	int erase_region_size;
+	int erase_region_count;
+	struct cfi_qry qry;
+
+	info->ext_addr = 0;
+	info->cfi_version = 0;
+#ifdef CFG_FLASH_PROTECTION
+	info->legacy_unlock = 0;
+#endif
+
+	info->start[0] = base;
+
+	if (flash_detect_cfi (info, &qry)) {
+		info->vendor = le16_to_cpu(qry.p_id);
+		info->ext_addr = le16_to_cpu(qry.p_adr);
+		num_erase_regions = qry.num_erase_regions;
+
+		if (info->ext_addr) {
+			info->cfi_version = (ushort) flash_read_uchar (info,
+						info->ext_addr + 3) << 8;
+			info->cfi_version |= (ushort) flash_read_uchar (info,
+						info->ext_addr + 4);
+		}
+
+#ifdef DEBUG
+		flash_printqry (&qry);
+#endif
+
+		switch (info->vendor) {
+		case CFI_CMDSET_INTEL_STANDARD:
+		case CFI_CMDSET_INTEL_EXTENDED:
+			cmdset_intel_init(info, &qry);
+			break;
+		case CFI_CMDSET_AMD_STANDARD:
+		case CFI_CMDSET_AMD_EXTENDED:
+			cmdset_amd_init(info, &qry);
+			break;
+		default:
+			printf("CFI: Unknown command set 0x%x\n",
+					info->vendor);
+			/*
+			 * Unfortunately, this means we don't know how
+			 * to get the chip back to Read mode. Might
+			 * as well try an Intel-style reset...
+			 */
+			flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
+			return 0;
+		}
+
+		/* Do manufacturer-specific fixups */
+		switch (info->manufacturer_id) {
+		case 0x0001:
+			flash_fixup_amd(info, &qry);
+			break;
+		case 0x001f:
+			flash_fixup_atmel(info, &qry);
+			break;
+		}
+
+		debug ("manufacturer is %d\n", info->vendor);
+		debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
+		debug ("device id is 0x%x\n", info->device_id);
+		debug ("device id2 is 0x%x\n", info->device_id2);
+		debug ("cfi version is 0x%04x\n", info->cfi_version);
+
+		size_ratio = info->portwidth / info->chipwidth;
+		/* if the chip is x8/x16 reduce the ratio by half */
+		if ((info->interface == FLASH_CFI_X8X16)
+		    && (info->chipwidth == FLASH_CFI_BY8)) {
+			size_ratio >>= 1;
+		}
+		debug ("size_ratio %d port %d bits chip %d bits\n",
+		       size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
+		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		debug ("found %d erase regions\n", num_erase_regions);
+		sect_cnt = 0;
+		sector = base;
+		for (i = 0; i < num_erase_regions; i++) {
+			if (i > NUM_ERASE_REGIONS) {
+				printf ("%d erase regions found, only %d used\n",
+					num_erase_regions, NUM_ERASE_REGIONS);
+				break;
+			}
+
+			tmp = le32_to_cpu(qry.erase_region_info[i]);
+			debug("erase region %u: 0x%08lx\n", i, tmp);
+
+			erase_region_count = (tmp & 0xffff) + 1;
+			tmp >>= 16;
+			erase_region_size =
+				(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
+			debug ("erase_region_count = %d erase_region_size = %d\n",
+				erase_region_count, erase_region_size);
+			for (j = 0; j < erase_region_count; j++) {
+				if (sect_cnt >= CFG_MAX_FLASH_SECT) {
+					printf("ERROR: too many flash sectors\n");
+					break;
+				}
+				info->start[sect_cnt] = sector;
+				sector += (erase_region_size * size_ratio);
+
+				/*
+				 * Only read protection status from
+				 * supported devices (intel...)
+				 */
+				switch (info->vendor) {
+				case CFI_CMDSET_INTEL_EXTENDED:
+				case CFI_CMDSET_INTEL_STANDARD:
+					info->protect[sect_cnt] =
+						flash_isset (info, sect_cnt,
+							     FLASH_OFFSET_PROTECT,
+							     FLASH_STATUS_PROTECT);
+					break;
+				default:
+					/* default: not protected */
+					info->protect[sect_cnt] = 0;
+				}
+
+				sect_cnt++;
+			}
+		}
+
+		info->sector_count = sect_cnt;
+		info->size = 1 << qry.dev_size;
+		/* multiply the size by the number of chips */
+		info->size *= size_ratio;
+		info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
+		tmp = 1 << qry.block_erase_timeout_typ;
+		info->erase_blk_tout = tmp *
+			(1 << qry.block_erase_timeout_max);
+		tmp = (1 << qry.buf_write_timeout_typ) *
+			(1 << qry.buf_write_timeout_max);
+
+		/* round up when converting to ms */
+		info->buffer_write_tout = (tmp + 999) / 1000;
+		tmp = (1 << qry.word_write_timeout_typ) *
+			(1 << qry.word_write_timeout_max);
+		/* round up when converting to ms */
+		info->write_tout = (tmp + 999) / 1000;
+		info->flash_id = FLASH_MAN_CFI;
+		if ((info->interface == FLASH_CFI_X8X16) &&
+		    (info->chipwidth == FLASH_CFI_BY8)) {
+			/* XXX - Need to test on x8/x16 in parallel. */
+			info->portwidth >>= 1;
+		}
+	}
+
+	flash_write_cmd (info, 0, 0, info->cmd_reset);
+	return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init (void)
+{
+	unsigned long size = 0;
+	int i;
+
+#ifdef CFG_FLASH_PROTECTION
+	char *s = getenv("unlock");
+#endif
+
+	/* Init: no FLASHes known */
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+
+		if (!flash_detect_legacy (bank_base[i], i))
+			flash_get_size (bank_base[i], i);
+		size += flash_info[i].size;
+		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+#ifndef CFG_FLASH_QUIET_TEST
+			printf ("## Unknown FLASH on Bank %d "
+				"- Size = 0x%08lx = %ld MB\n",
+				i+1, flash_info[i].size,
+				flash_info[i].size << 20);
+#endif /* CFG_FLASH_QUIET_TEST */
+		}
+#ifdef CFG_FLASH_PROTECTION
+		else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
+			/*
+			 * Only the U-Boot image and it's environment
+			 * is protected, all other sectors are
+			 * unprotected (unlocked) if flash hardware
+			 * protection is used (CFG_FLASH_PROTECTION)
+			 * and the environment variable "unlock" is
+			 * set to "yes".
+			 */
+			if (flash_info[i].legacy_unlock) {
+				int k;
+
+				/*
+				 * Disable legacy_unlock temporarily,
+				 * since flash_real_protect would
+				 * relock all other sectors again
+				 * otherwise.
+				 */
+				flash_info[i].legacy_unlock = 0;
+
+				/*
+				 * Legacy unlocking (e.g. Intel J3) ->
+				 * unlock only one sector. This will
+				 * unlock all sectors.
+				 */
+				flash_real_protect (&flash_info[i], 0, 0);
+
+				flash_info[i].legacy_unlock = 1;
+
+				/*
+				 * Manually mark other sectors as
+				 * unlocked (unprotected)
+				 */
+				for (k = 1; k < flash_info[i].sector_count; k++)
+					flash_info[i].protect[k] = 0;
+			} else {
+				/*
+				 * No legancy unlocking -> unlock all sectors
+				 */
+				flash_protect (FLAG_PROTECT_CLEAR,
+					       flash_info[i].start[0],
+					       flash_info[i].start[0]
+					       + flash_info[i].size - 1,
+					       &flash_info[i]);
+			}
+		}
+#endif /* CFG_FLASH_PROTECTION */
+	}
+
+	/* Monitor protection ON by default */
+#if (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_MONITOR_BASE,
+		       CFG_MONITOR_BASE + monitor_flash_len  - 1,
+		       flash_get_info(CFG_MONITOR_BASE));
+#endif
+
+	/* Environment protection ON by default */
+#ifdef CFG_ENV_IS_IN_FLASH
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV_ADDR,
+		       CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
+		       flash_get_info(CFG_ENV_ADDR));
+#endif
+
+	/* Redundant environment protection ON by default */
+#ifdef CFG_ENV_ADDR_REDUND
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV_ADDR_REDUND,
+		       CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
+		       flash_get_info(CFG_ENV_ADDR_REDUND));
+#endif
+	return (size);
+}
+
+#endif /* CFG_FLASH_CFI */