added boot script files to repository

1 files changed, 903 insertions, 0 deletions

diff --git a/u-boot/board/amirix/ap1000/flash.c b/u-boot/board/amirix/ap1000/flash.c
new file mode 100644
index 0000000..1e742e5
--- /dev/null
+++ b/u-boot/board/amirix/ap1000/flash.c
@@ -0,0 +1,903 @@
+/**
+ * @file flash.c
+ */
+
+/*
+ * (C) Copyright 2003
+ * AMIRIX Systems Inc.
+ *
+ * Originated from ppcboot-2.0.0/board/esd/cpci440/strataflash.c
+ *
+ * (C) Copyright 2002
+ * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
+ *
+ * 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 <common.h>
+#include <asm/processor.h>
+
+#undef  DEBUG_FLASH
+/*
+ * This file implements a Common Flash Interface (CFI) driver for ppcboot.
+ * 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.
+ * It has been tested on an Intel Strataflash implementation.
+ *
+ * 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
+ *
+ * TODO
+ * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
+ * Add support for other command sets Use the PRI and ALT to determine command set
+ * Verify erase and program timeouts.
+ */
+
+#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 FLASH_OFFSET_CFI        0x55
+#define FLASH_OFFSET_CFI_RESP       0x10
+#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 FLASH_MAN_CFI           0x01000000
+
+typedef union {
+	unsigned char c;
+	unsigned short w;
+	unsigned long l;
+} cfiword_t;
+
+typedef union {
+	unsigned char *cp;
+	unsigned short *wp;
+	unsigned long *lp;
+} cfiptr_t;
+
+#define NUM_ERASE_REGIONS 4
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];	/* info for FLASH chips    */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c);
+static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
+static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
+			     uchar cmd);
+static int flash_isequal (flash_info_t * info, int sect, uchar offset,
+			  uchar cmd);
+static int flash_isset (flash_info_t * info, int sect, uchar offset,
+			uchar cmd);
+static int flash_detect_cfi (flash_info_t * info);
+static ulong flash_get_size (ulong base, int banknum);
+static int flash_write_cfiword (flash_info_t * info, ulong dest,
+				cfiword_t cword);
+static int flash_full_status_check (flash_info_t * info, ulong sector,
+				    ulong tout, char *prompt);
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
+				  int len);
+#endif
+/*-----------------------------------------------------------------------
+ * create an address based on the offset and the port width
+ */
+uchar *flash_make_addr (flash_info_t * info, int sect, int offset)
+{
+	return ((uchar *) (info->start[sect] + (offset * info->chipwidth)));
+}
+
+/*-----------------------------------------------------------------------
+ * read a character at a port width address
+ */
+uchar flash_read_uchar (flash_info_t * info, uchar offset)
+{
+	if (info->portwidth == FLASH_CFI_8BIT) {
+		volatile uchar *cp;
+		uchar c;
+
+		cp = flash_make_addr (info, 0, offset);
+		c = *cp;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_uchar offset=%04x ptr=%08x c=%02x\n",
+			offset, (unsigned int) cp, c);
+#endif
+		return (c);
+
+	} else if (info->portwidth == FLASH_CFI_16BIT) {
+		volatile ushort *sp;
+		ushort s;
+		uchar c;
+
+		sp = (ushort *) flash_make_addr (info, 0, offset);
+		s = *sp;
+		c = (uchar) s;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_uchar offset=%04x ptr=%08x s=%04x c=%02x\n", offset, (unsigned int) sp, s, c);
+#endif
+		return (c);
+
+	}
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * read a short word by swapping for ppc format.
+ */
+ushort flash_read_ushort (flash_info_t * info, int sect, uchar offset)
+{
+	if (info->portwidth == FLASH_CFI_8BIT) {
+		volatile uchar *cp;
+		uchar c0, c1;
+		ushort s;
+
+		cp = flash_make_addr (info, 0, offset);
+		c1 = cp[2];
+		c0 = cp[0];
+		s = c1 << 8 | c0;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) cp, c1, c0, s);
+#endif
+		return (s);
+
+	} else if (info->portwidth == FLASH_CFI_16BIT) {
+		volatile ushort *sp;
+		ushort s;
+		uchar c0, c1;
+
+		sp = (ushort *) flash_make_addr (info, 0, offset);
+		s = *sp;
+		c1 = (uchar) sp[1];
+		c0 = (uchar) sp[0];
+		s = c1 << 8 | c0;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) sp, c1, c0, s);
+#endif
+		return (s);
+
+	}
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * read a long word by picking the least significant byte of each maiximum
+ * port size word. Swap for ppc format.
+ */
+ulong flash_read_long (flash_info_t * info, int sect, uchar offset)
+{
+	if (info->portwidth == FLASH_CFI_8BIT) {
+		volatile uchar *cp;
+		uchar c0, c1, c2, c3;
+		ulong l;
+
+		cp = flash_make_addr (info, 0, offset);
+		c3 = cp[6];
+		c2 = cp[4];
+		c1 = cp[2];
+		c0 = cp[0];
+		l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) cp, c3, c2, c1, c0, l);
+#endif
+		return (l);
+
+	} else if (info->portwidth == FLASH_CFI_16BIT) {
+		volatile ushort *sp;
+		uchar c0, c1, c2, c3;
+		ulong l;
+
+		sp = (ushort *) flash_make_addr (info, 0, offset);
+		c3 = (uchar) sp[3];
+		c2 = (uchar) sp[2];
+		c1 = (uchar) sp[1];
+		c0 = (uchar) sp[0];
+		l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
+#ifdef DEBUG_FLASH
+		printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) sp, c3, c2, c1, c0, l);
+#endif
+		return (l);
+
+	}
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init (void)
+{
+	unsigned long size;
+
+	size = 0;
+
+	flash_info[0].flash_id = FLASH_UNKNOWN;
+	flash_info[0].portwidth = FLASH_CFI_16BIT;
+	flash_info[0].chipwidth = FLASH_CFI_16BIT;
+	size += flash_info[0].size = flash_get_size (CONFIG_SYS_PROGFLASH_BASE, 0);
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 1, flash_info[0].size, flash_info[0].size << 20);
+	};
+
+	flash_info[1].flash_id = FLASH_UNKNOWN;
+	flash_info[1].portwidth = FLASH_CFI_8BIT;
+	flash_info[1].chipwidth = FLASH_CFI_16BIT;
+	size += flash_info[1].size = flash_get_size (CONFIG_SYS_CONFFLASH_BASE, 1);
+	if (flash_info[1].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 2, flash_info[1].size, flash_info[1].size << 20);
+	};
+
+	return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int rcode = 0;
+	int prot;
+	int sect;
+
+	if (info->flash_id != FLASH_MAN_CFI) {
+		printf ("Can't erase unknown flash type - aborted\n");
+		return 1;
+	}
+	if ((s_first < 0) || (s_first > s_last)) {
+		printf ("- 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 {
+		printf ("\n");
+	}
+
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			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);
+
+			if (flash_full_status_check
+			    (info, sect, info->erase_blk_tout, "erase")) {
+				rcode = 1;
+			} else
+				printf (".");
+		}
+	}
+	printf (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	if (info->flash_id != FLASH_MAN_CFI) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	printf ("CFI conformant FLASH (x%d device in x%d mode)",
+		(info->chipwidth << 3), (info->portwidth << 3));
+	printf ("  Size: %ld MB in %d Sectors\n",
+		info->size >> 20, info->sector_count);
+	printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
+
+	printf ("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; ++i) {
+		if ((i % 5) == 0)
+			printf ("\n");
+		printf (" %08lX%5s",
+			info->start[i], info->protect[i] ? " (RO)" : " ");
+	}
+	printf ("\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;
+	ulong cp;
+	int aln;
+	cfiword_t cword;
+	int i, rc;
+
+	/* get lower aligned address */
+	wp = (addr & ~(info->portwidth - 1));
+
+	/* handle unaligned start */
+	if ((aln = addr - wp) != 0) {
+		cword.l = 0;
+		cp = wp;
+		for (i = 0; i < aln; ++i, ++cp)
+			flash_add_byte (info, &cword, (*(uchar *) cp));
+
+		for (; (i < info->portwidth) && (cnt > 0); i++) {
+			flash_add_byte (info, &cword, *src++);
+			cnt--;
+			cp++;
+		}
+		for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
+			flash_add_byte (info, &cword, (*(uchar *) cp));
+		if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
+			return rc;
+		wp = cp;
+	}
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+	while (cnt >= info->portwidth) {
+		i = info->buffer_size > cnt ? cnt : info->buffer_size;
+		if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
+			return rc;
+		wp += i;
+		src += i;
+		cnt -= i;
+	}
+#else
+	/* handle the aligned part */
+	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 /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	cword.l = 0;
+	for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
+		flash_add_byte (info, &cword, *src++);
+		--cnt;
+	}
+	for (; i < info->portwidth; ++i, ++cp) {
+		flash_add_byte (info, &cword, (*(uchar *) cp));
+	}
+
+	return flash_write_cfiword (info, wp, cword);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+		/* Intel's unprotect unprotects all locking */
+		if (prot == 0) {
+			int i;
+
+			for (i = 0; i < info->sector_count; i++) {
+				if (info->protect[i])
+					flash_real_protect (info, i, 1);
+			}
+		}
+	}
+
+	return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ *  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, ulong sector, ulong tout,
+			       char *prompt)
+{
+	ulong start;
+
+	/* Wait for command completion */
+	start = get_timer (0);
+	while (!flash_isset (info, sector, 0, FLASH_STATUS_DONE)) {
+		if (get_timer (start) > info->erase_blk_tout) {
+			printf ("Flash %s timeout at address %lx\n", prompt,
+				info->start[sector]);
+			flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
+			return ERR_TIMOUT;
+		}
+	}
+	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, ulong sector,
+				    ulong tout, char *prompt)
+{
+	int retcode;
+
+	retcode = flash_status_check (info, sector, tout, prompt);
+	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)) {
+			printf ("Command Sequence Error.\n");
+		} else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
+			printf ("Block Erase Error.\n");
+			retcode = ERR_NOT_ERASED;
+		} else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
+			printf ("Locking Error\n");
+		}
+		if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
+			printf ("Block locked.\n");
+			retcode = ERR_PROTECTED;
+		}
+		if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
+			printf ("Vpp Low Error.\n");
+	}
+	flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
+	return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
+{
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		cword->c = c;
+		break;
+	case FLASH_CFI_16BIT:
+		cword->w = (cword->w << 8) | c;
+		break;
+	case FLASH_CFI_32BIT:
+		cword->l = (cword->l << 8) | c;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ * 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;
+
+	/* for(i=0; i< info->portwidth; i++) */
+	/*  *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd; */
+	if (info->portwidth == FLASH_CFI_8BIT
+	    && info->chipwidth == FLASH_CFI_16BIT) {
+		cp[0] = cmd;
+	} else if (info->portwidth == FLASH_CFI_16BIT
+		   && info->chipwidth == FLASH_CFI_16BIT) {
+		cp[0] = '\0';
+		cp[1] = cmd;
+	};
+}
+
+/*
+ * Write a proper sized command to the correct address
+ */
+static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
+			     uchar cmd)
+{
+
+	volatile cfiptr_t addr;
+	cfiword_t cword;
+
+	addr.cp = flash_make_addr (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		*addr.cp = cword.c;
+		break;
+	case FLASH_CFI_16BIT:
+		*addr.wp = cword.w;
+		break;
+	case FLASH_CFI_32BIT:
+		*addr.lp = cword.l;
+		break;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isequal (flash_info_t * info, int sect, uchar offset,
+			  uchar cmd)
+{
+	cfiptr_t cptr;
+	cfiword_t cword;
+	int retval;
+
+	cptr.cp = flash_make_addr (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		retval = (cptr.cp[0] == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		retval = (cptr.wp[0] == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		retval = (cptr.lp[0] == cword.l);
+		break;
+	default:
+		retval = 0;
+		break;
+	}
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isset (flash_info_t * info, int sect, uchar offset,
+			uchar cmd)
+{
+	cfiptr_t cptr;
+	cfiword_t cword;
+	int retval;
+
+	cptr.cp = flash_make_addr (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		retval = ((cptr.cp[0] & cword.c) == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		retval = ((cptr.wp[0] & cword.w) == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		retval = ((cptr.lp[0] & cword.l) == cword.l);
+		break;
+	default:
+		retval = 0;
+		break;
+	}
+	return retval;
+}
+
+/*-----------------------------------------------------------------------
+ * detect if flash is compatible with the Common Flash Interface (CFI)
+ * http://www.jedec.org/download/search/jesd68.pdf
+ *
+*/
+static int flash_detect_cfi (flash_info_t * info)
+{
+
+#if 0
+	for (info->portwidth = FLASH_CFI_8BIT;
+	     info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) {
+		for (info->chipwidth = FLASH_CFI_BY8;
+		     info->chipwidth <= info->portwidth;
+		     info->chipwidth <<= 1) {
+			flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
+			flash_write_cmd (info, 0, FLASH_OFFSET_CFI,
+					 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'))
+				return 1;
+		}
+	}
+#endif
+	flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
+	flash_write_cmd (info, 0, FLASH_OFFSET_CFI, 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')) {
+		return 1;
+	} else {
+		return 0;
+	};
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ *
+ */
+static ulong flash_get_size (ulong base, int banknum)
+{
+	flash_info_t *info = &flash_info[banknum];
+	int i, j;
+	int sect_cnt;
+	unsigned long sector;
+	unsigned long tmp;
+	int size_ratio;
+	uchar num_erase_regions;
+	int erase_region_size;
+	int erase_region_count;
+
+	info->start[0] = base;
+
+	if (flash_detect_cfi (info)) {
+#ifdef DEBUG_FLASH
+		printf ("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth);	/* test-only */
+#endif
+		size_ratio = 1;	/* info->portwidth / info->chipwidth; */
+		num_erase_regions =
+			flash_read_uchar (info,
+					  FLASH_OFFSET_NUM_ERASE_REGIONS);
+#ifdef DEBUG_FLASH
+		printf ("found %d erase regions\n", num_erase_regions);
+#endif
+		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 = flash_read_long (info, 0,
+					       FLASH_OFFSET_ERASE_REGIONS);
+			erase_region_count = (tmp & 0xffff) + 1;
+			tmp >>= 16;
+			erase_region_size =
+				(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
+			for (j = 0; j < erase_region_count; j++) {
+				info->start[sect_cnt] = sector;
+				sector += (erase_region_size * size_ratio);
+				info->protect[sect_cnt] =
+					flash_isset (info, sect_cnt,
+						     FLASH_OFFSET_PROTECT,
+						     FLASH_STATUS_PROTECT);
+				sect_cnt++;
+			}
+		}
+
+		info->sector_count = sect_cnt;
+		/* multiply the size by the number of chips */
+		info->size =
+			(1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) *
+			size_ratio;
+		info->buffer_size =
+			(1 <<
+			 flash_read_ushort (info, 0,
+					    FLASH_OFFSET_BUFFER_SIZE));
+		tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
+		info->erase_blk_tout =
+			(tmp *
+			 (1 <<
+			  flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
+		tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT);
+		info->buffer_write_tout =
+			(tmp *
+			 (1 <<
+			  flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT)));
+		tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT);
+		info->write_tout =
+			(tmp *
+			 (1 <<
+			  flash_read_uchar (info,
+					    FLASH_OFFSET_WMAX_TOUT))) / 1000;
+		info->flash_id = FLASH_MAN_CFI;
+	}
+
+	flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
+	return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_write_cfiword (flash_info_t * info, ulong dest,
+				cfiword_t cword)
+{
+
+	cfiptr_t ctladdr;
+	cfiptr_t cptr;
+	int flag;
+
+	ctladdr.cp = flash_make_addr (info, 0, 0);
+	cptr.cp = (uchar *) dest;
+
+	/* Check if Flash is (sufficiently) erased */
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		flag = ((cptr.cp[0] & cword.c) == cword.c);
+		break;
+	case FLASH_CFI_16BIT:
+		flag = ((cptr.wp[0] & cword.w) == cword.w);
+		break;
+	case FLASH_CFI_32BIT:
+		flag = ((cptr.lp[0] & cword.l) == cword.l);
+		break;
+	default:
+		return 2;
+	}
+	if (!flag)
+		return 2;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
+	flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
+
+	switch (info->portwidth) {
+	case FLASH_CFI_8BIT:
+		cptr.cp[0] = cword.c;
+		break;
+	case FLASH_CFI_16BIT:
+		cptr.wp[0] = cword.w;
+		break;
+	case FLASH_CFI_32BIT:
+		cptr.lp[0] = cword.l;
+		break;
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts ();
+
+	return flash_full_status_check (info, 0, info->write_tout, "write");
+}
+
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+
+/* 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 int find_sector (flash_info_t * info, ulong addr)
+{
+	int sector;
+
+	for (sector = info->sector_count - 1; sector >= 0; sector--) {
+		if (addr >= info->start[sector])
+			break;
+	}
+	return sector;
+}
+
+static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
+				  int len)
+{
+
+	int sector;
+	int cnt;
+	int retcode;
+	volatile cfiptr_t src;
+	volatile cfiptr_t dst;
+
+	src.cp = cp;
+	dst.cp = (uchar *) dest;
+	sector = find_sector (info, dest);
+	flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+	flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
+	if ((retcode =
+	     flash_status_check (info, sector, info->buffer_write_tout,
+				 "write to buffer")) == ERR_OK) {
+		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;
+		default:
+			return ERR_INVAL;
+			break;
+		}
+		flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
+		while (cnt-- > 0) {
+			switch (info->portwidth) {
+			case FLASH_CFI_8BIT:
+				*dst.cp++ = *src.cp++;
+				break;
+			case FLASH_CFI_16BIT:
+				*dst.wp++ = *src.wp++;
+				break;
+			case FLASH_CFI_32BIT:
+				*dst.lp++ = *src.lp++;
+				break;
+			default:
+				return ERR_INVAL;
+				break;
+			}
+		}
+		flash_write_cmd (info, sector, 0,
+				 FLASH_CMD_WRITE_BUFFER_CONFIRM);
+		retcode =
+			flash_full_status_check (info, sector,
+						 info->buffer_write_tout,
+						 "buffer write");
+	}
+	flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+	return retcode;
+}
+#endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */