* Some code cleanup

* Patch by Josef Baumgartner, 10 Feb 2004:
  Fixes for Coldfire port

* Patch by Brad Kemp, 11 Feb 2004:
  Fix CFI flash driver problems

1 files changed, 534 insertions, 303 deletions

diff --git a/drivers/cfi_flash.c b/drivers/cfi_flash.c
index c4d7bff54..c6c2751d6 100644
--- a/drivers/cfi_flash.c
+++ b/drivers/cfi_flash.c
@@ -1,11 +1,15 @@
 /*
- * (C) Copyright 2002
+ * (C) Copyright 2002-2004
  * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
  *
  * Copyright (C) 2003 Arabella Software Ltd.
  * Yuli Barcohen <yuli@arabellasw.com>
  * Modified to work with AMD flashes
  *
+ * Copyright (C) 2004
+ * Ed Okerson
+ * Modified to work with little-endian systems.
+ *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
@@ -26,18 +30,22 @@
  *
  * History
  * 01/20/2004 - combined variants of original driver.
+ * 01/22/2004 - Write performance enhancements for parallel chips (Tolunay)
+ * 01/23/2004 - Support for x8/x16 chips (Rune Raknerud)
+ * 01/27/2004 - Little endian support Ed Okerson
  *
  * Tested Architectures
- * Port Width  Chip Width    # of banks    Flash Chip  Board
- * 32          16            1             23F128J3    seranoa/eagle
+ * Port Width  Chip Width    # of banks	   Flash Chip  Board
+ * 32	       16	     1		   23F128J3    seranoa/eagle
+ * 64	       16	     1		   23F128J3    seranoa/falcon
  *
  */
 
 /* The DEBUG define must be before common to enable debugging */
-#undef  DEBUG
+#undef	DEBUG
 #include <common.h>
 #include <asm/processor.h>
-#ifdef  CFG_FLASH_CFI_DRIVER
+#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.
@@ -59,6 +67,10 @@
  * Verify erase and program timeouts.
  */
 
+#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
@@ -69,8 +81,8 @@
 #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_CMD_WRITE_TO_BUFFER	0xE8
+#define FLASH_CMD_WRITE_BUFFER_CONFIRM	0xD0
 
 #define FLASH_STATUS_DONE		0x80
 #define FLASH_STATUS_ESS		0x40
@@ -92,35 +104,35 @@
 
 #define FLASH_OFFSET_CFI		0x55
 #define FLASH_OFFSET_CFI_RESP		0x10
-#define FLASH_OFFSET_PRIMARY_VENDOR     0x13
+#define FLASH_OFFSET_PRIMARY_VENDOR	0x13
 #define FLASH_OFFSET_WTOUT		0x1F
-#define FLASH_OFFSET_WBTOUT             0x20
+#define FLASH_OFFSET_WBTOUT		0x20
 #define FLASH_OFFSET_ETOUT		0x21
-#define FLASH_OFFSET_CETOUT             0x22
+#define FLASH_OFFSET_CETOUT		0x22
 #define FLASH_OFFSET_WMAX_TOUT		0x23
-#define FLASH_OFFSET_WBMAX_TOUT         0x24
+#define FLASH_OFFSET_WBMAX_TOUT		0x24
 #define FLASH_OFFSET_EMAX_TOUT		0x25
-#define FLASH_OFFSET_CEMAX_TOUT         0x26
+#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_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_OFFSET_USER_PROTECTION	0x85
+#define FLASH_OFFSET_INTEL_PROTECTION	0x81
 
 
 #define FLASH_MAN_CFI			0x01000000
 
-#define CFI_CMDSET_NONE             0
+#define CFI_CMDSET_NONE		    0
 #define CFI_CMDSET_INTEL_EXTENDED   1
-#define CFI_CMDSET_AMD_STANDARD     2
+#define CFI_CMDSET_AMD_STANDARD	    2
 #define CFI_CMDSET_INTEL_STANDARD   3
-#define CFI_CMDSET_AMD_EXTENDED     4
+#define CFI_CMDSET_AMD_EXTENDED	    4
 #define CFI_CMDSET_MITSU_STANDARD   256
 #define CFI_CMDSET_MITSU_EXTENDED   257
-#define CFI_CMDSET_SST              258
+#define CFI_CMDSET_SST		    258
 
 
 typedef union {
@@ -131,9 +143,9 @@ typedef union {
 } cfiword_t;
 
 typedef union {
-	volatile unsigned char  *cp;
+	volatile unsigned char *cp;
 	volatile unsigned short *wp;
-	volatile unsigned long  *lp;
+	volatile unsigned long *lp;
 	volatile unsigned long long *llp;
 } cfiptr_t;
 
@@ -141,7 +153,7 @@ typedef union {
 
 static ulong bank_base[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS_LIST;
 
-flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips	  */
 
 /*-----------------------------------------------------------------------
  * Functions
@@ -149,74 +161,157 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
 
 typedef unsigned long flash_sect_t;
 
-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, flash_sect_t sect, uint offset, uchar cmd);
-static void flash_unlock_seq(flash_info_t *info);
-static int flash_isequal(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-static int flash_isset(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-static int flash_toggle(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
-static int flash_detect_cfi(flash_info_t * info);
+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, flash_sect_t sect,
+			     uint offset, uchar cmd);
+static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect);
+static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset,
+			  uchar cmd);
+static int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset,
+			uchar cmd);
+static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint 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, flash_sect_t sector, ulong tout, char * prompt);
+static int flash_write_cfiword (flash_info_t * info, ulong dest,
+				cfiword_t cword);
+static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
+				    ulong tout, char *prompt);
 #ifdef CFG_FLASH_USE_BUFFER_WRITE
-static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len);
+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
+ */
+inline uchar *flash_make_addr (flash_info_t * info, flash_sect_t sect,
+			       uint offset)
+{
+	return ((uchar *) (info->start[sect] + (offset * info->portwidth)));
+}
+
 #ifdef DEBUG
-void print_longlong(char * str, unsigned long long data)
+/*-----------------------------------------------------------------------
+ * Debug support
+ */
+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++);
+
+	cp = (unsigned char *) &data;
+	for (i = 0; i < 8; i++)
+		sprintf (&str[i * 2], "%2.2x", *cp++);
 }
+static void flash_printqry (flash_info_t * info, flash_sect_t sect)
+{
+	cfiptr_t cptr;
+	int x, y;
+
+	for (x = 0; x < 0x40; x += 16 / info->portwidth) {
+		cptr.cp =
+			flash_make_addr (info, sect,
+					 x + FLASH_OFFSET_CFI_RESP);
+		debug ("%p : ", cptr.cp);
+		for (y = 0; y < 16; y++) {
+			debug ("%2.2x ", cptr.cp[y]);
+		}
+		debug (" ");
+		for (y = 0; y < 16; y++) {
+			if (cptr.cp[y] >= 0x20 && cptr.cp[y] <= 0x7e) {
+				debug ("%c", cptr.cp[y]);
+			} else {
+				debug (".");
+			}
+		}
+		debug ("\n");
+	}
+}
+
 #endif
 
 
 /*-----------------------------------------------------------------------
- * create an address based on the offset and the port width
- */
-inline uchar * flash_make_addr(flash_info_t * info, flash_sect_t sect, uint offset)
-{
-	return ((uchar *)(info->start[sect] + (offset * info->portwidth)));
-}
-/*-----------------------------------------------------------------------
  * read a character at a port width address
  */
-inline uchar flash_read_uchar(flash_info_t * info, uint offset)
+inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 {
 	uchar *cp;
-	cp = flash_make_addr(info, 0, offset);
+
+	cp = flash_make_addr (info, 0, offset);
+#if defined(__LITTLE_ENDIAN)
+	return (cp[0]);
+#else
 	return (cp[info->portwidth - 1]);
+#endif
 }
 
 /*-----------------------------------------------------------------------
  * read a short word by swapping for ppc format.
  */
-ushort flash_read_ushort(flash_info_t * info, flash_sect_t sect,  uint offset)
+ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint offset)
 {
-    uchar * addr;
+	uchar *addr;
+	ushort retval;
 
-    addr = flash_make_addr(info, sect, offset);
-    return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]);
+#ifdef DEBUG
+	int x;
+#endif
+	addr = flash_make_addr (info, sect, offset);
 
+#ifdef DEBUG
+	debug ("ushort addr is at %p info->portwidth = %d\n", addr,
+	       info->portwidth);
+	for (x = 0; x < 2 * info->portwidth; x++) {
+		debug ("addr[%x] = 0x%x\n", x, addr[x]);
+	}
+#endif
+#if defined(__LITTLE_ENDIAN)
+	retval = ((addr[(info->portwidth)] << 8) | addr[0]);
+#else
+	retval = ((addr[(2 * info->portwidth) - 1] << 8) |
+		  addr[info->portwidth - 1]);
+#endif
+
+	debug ("retval = 0x%x\n", retval);
+	return retval;
 }
 
 /*-----------------------------------------------------------------------
  * 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, flash_sect_t sect,  uint offset)
+ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
 {
-    uchar * addr;
 
-    addr = flash_make_addr(info, sect, offset);
-    return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) |
-	    (addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]);
+	uchar *addr;
+	ulong retval;
+
+#ifdef DEBUG
+	int x;
+#endif
+	addr = flash_make_addr (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, addr[x]);
+	}
+#endif
+#if defined(__LITTLE_ENDIAN)
+	retval = (addr[0] << 16) | (addr[(info->portwidth)] << 24) |
+		(addr[(2 * info->portwidth)]) | (addr[(3 * info->portwidth)]
+						 << 8);
+#else
+	retval = (addr[(2 * info->portwidth) - 1] << 24) |
+		(addr[(info->portwidth) - 1] << 16) |
+		(addr[(4 * info->portwidth) - 1] << 8) |
+		addr[(3 * info->portwidth) - 1];
+#endif
+	return retval;
 }
 
 /*-----------------------------------------------------------------------
@@ -227,21 +322,20 @@ unsigned long flash_init (void)
 	int i;
 
 	/* Init: no FLASHes known */
-	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 		flash_info[i].flash_id = FLASH_UNKNOWN;
-		size += flash_info[i].size = flash_get_size(bank_base[i], i);
+		size += flash_info[i].size = flash_get_size (bank_base[i], i);
 		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
-			printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
-				i, flash_info[i].size, flash_info[i].size << 20);
+			printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, flash_info[i].size, flash_info[i].size << 20);
 		}
 	}
 
 	/* 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_info[0]);
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_MONITOR_BASE,
+		       CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+		       &flash_info[0]);
 #endif
 
 	return (size);
@@ -249,13 +343,13 @@ unsigned long flash_init (void)
 
 /*-----------------------------------------------------------------------
  */
-int flash_erase (flash_info_t *info, int s_first, int s_last)
+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) {
+	if (info->flash_id != FLASH_MAN_CFI) {
 		printf ("Can't erase unknown flash type - aborted\n");
 		return 1;
 	}
@@ -265,44 +359,50 @@ int flash_erase (flash_info_t *info, int s_first, int s_last)
 	}
 
 	prot = 0;
-	for (sect=s_first; sect<=s_last; ++sect) {
+	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);
+		printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 	} else {
 		printf ("\n");
 	}
 
 
-	for (sect = s_first; sect<=s_last; sect++) {
+	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) { /* not protected */
-			switch(info->vendor) {
+			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);
+				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);
-				flash_write_cmd(info, sect, 0x555, AMD_CMD_ERASE_START);
-				flash_unlock_seq(info);
-				flash_write_cmd(info, sect, 0, AMD_CMD_ERASE_SECTOR);
+				flash_unlock_seq (info, sect);
+				flash_write_cmd (info, sect, 0x555,
+						 AMD_CMD_ERASE_START);
+				flash_unlock_seq (info, sect);
+				flash_write_cmd (info, sect, 0,
+						 AMD_CMD_ERASE_SECTOR);
 				break;
 			default:
-				debug("Unkown flash vendor %d\n", info->vendor);
+				debug ("Unkown flash vendor %d\n",
+				       info->vendor);
 				break;
 			}
 
-			if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) {
+			if (flash_full_status_check
+			    (info, sect, info->erase_blk_tout, "erase")) {
 				rcode = 1;
 			} else
-				printf(".");
+				printf (".");
 		}
 	}
 	printf (" done\n");
@@ -311,7 +411,7 @@ int flash_erase (flash_info_t *info, int s_first, int s_last)
 
 /*-----------------------------------------------------------------------
  */
-void flash_print_info  (flash_info_t *info)
+void flash_print_info (flash_info_t * info)
 {
 	int i;
 
@@ -320,15 +420,14 @@ void flash_print_info  (flash_info_t *info)
 		return;
 	}
 
-	printf("CFI conformant FLASH (%d x %d)",
-	       (info->portwidth	 << 3 ), (info->chipwidth  << 3 ));
+	printf ("CFI conformant FLASH (%d x %d)",
+		(info->portwidth << 3), (info->chipwidth << 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 (" 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) {
+	for (i = 0; i < info->sector_count; ++i) {
 #ifdef CFG_FLASH_EMPTY_INFO
 		int k;
 		int size;
@@ -338,21 +437,19 @@ void flash_print_info  (flash_info_t *info)
 		/*
 		 * Check if whole sector is erased
 		 */
-		if (i != (info->sector_count-1))
-		  size = info->start[i+1] - info->start[i];
+		if (i != (info->sector_count - 1))
+			size = info->start[i + 1] - info->start[i];
 		else
-		  size = info->start[0] + info->size - info->start[i];
+			size = info->start[0] + info->size - info->start[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;
-		      }
-		  }
+		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;
+			}
+		}
 
 		if ((i % 5) == 0)
 			printf ("\n");
@@ -365,8 +462,7 @@ void flash_print_info  (flash_info_t *info)
 		if ((i % 5) == 0)
 			printf ("\n   ");
 		printf (" %08lX%s",
-			info->start[i],
-			info->protect[i] ? " (RO)" : "     ");
+			info->start[i], info->protect[i] ? " (RO)" : "	   ");
 #endif
 	}
 	printf ("\n");
@@ -379,7 +475,7 @@ void flash_print_info  (flash_info_t *info)
  * 1 - write timeout
  * 2 - Flash not erased
  */
-int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 {
 	ulong wp;
 	ulong cp;
@@ -387,45 +483,69 @@ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 	cfiword_t cword;
 	int i, rc;
 
+#ifdef CFG_FLASH_USE_BUFFER_WRITE
+	int buffered_size;
+#endif
+	int x8mode = 0;
+
+	/* special handling of 16 bit devices in 8 bit mode */
+	if ((info->interface == FLASH_CFI_X8X16)
+	    && (info->chipwidth == FLASH_CFI_BY8)) {
+		switch (info->vendor) {
+		case CFI_CMDSET_INTEL_STANDARD:
+		case CFI_CMDSET_INTEL_EXTENDED:
+			x8mode = info->portwidth;
+			info->portwidth >>= 1;	/* XXX - Need to test on x9/x16 in parallel. */
+			/*info->portwidth = FLASH_CFI_8BIT; */ /* XXX - Need to test on x9/x16 in parallel. */
+			break;
+		case CFI_CMDSET_AMD_STANDARD:
+		case CFI_CMDSET_AMD_EXTENDED:
+		default:
+			break;
+		}
+	}
+	/* get lower aligned address */
 	/* get lower aligned address */
 	wp = (addr & ~(info->portwidth - 1));
 
 	/* handle unaligned start */
-	if((aln = addr - wp) != 0) {
+	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 = 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++);
+		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)
+		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;
 	}
 
+	/* handle the aligned part */
 #ifdef CFG_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)
+	buffered_size = (info->portwidth / info->chipwidth);
+	buffered_size *= info->buffer_size;
+	while (cnt >= info->portwidth) {
+		i = buffered_size > cnt ? cnt : buffered_size;
+		if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
 			return rc;
 		wp += i;
 		src += i;
-		cnt -=i;
+		cnt -= i;
 	}
 #else
-	/* handle the aligned part */
-	while(cnt >= info->portwidth) {
+	while (cnt >= info->portwidth) {
 		cword.l = 0;
-		for(i = 0; i < info->portwidth; i++) {
-			flash_add_byte(info, &cword, *src++);
+		for (i = 0; i < info->portwidth; i++) {
+			flash_add_byte (info, &cword, *src++);
 		}
-		if((rc = flash_write_cfiword(info, wp, cword)) != 0)
+		if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 			return rc;
 		wp += info->portwidth;
 		cnt -= info->portwidth;
@@ -439,154 +559,184 @@ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 	 * 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++);
+	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));
+	for (; i < info->portwidth; ++i, ++cp) {
+		flash_add_byte (info, &cword, (*(uchar *) cp));
 	}
 
-	return flash_write_cfiword(info, wp, cword);
+	/* special handling of 16 bit devices in 8 bit mode */
+	if (x8mode) {
+		info->portwidth = x8mode;;
+	}
+	return flash_write_cfiword (info, wp, cword);
 }
 
 /*-----------------------------------------------------------------------
  */
 #ifdef CFG_FLASH_PROTECTION
 
-int flash_real_protect(flash_info_t *info, long sector, int prot)
+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);
+	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);
+		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) {
+	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) {
+		if (prot == 0) {
 			flash_sect_t i;
-			for(i = 0 ; i<info->sector_count; i++) {
-				if(info->protect[i])
-					flash_real_protect(info, i, 1);
+
+			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)
+void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
+			     int len)
 {
-	uchar * src;
-	uchar * dst;
+	uchar *src;
+	uchar *dst;
 
 	dst = buffer;
-	src = flash_make_addr(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, FLASH_CMD_RESET);
+	src = flash_make_addr (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, FLASH_CMD_RESET);
 }
+
 /*
  * 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)
+void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
+				int len)
 {
-	uchar * src;
+	uchar *src;
 
-	src = flash_make_addr(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, FLASH_CMD_RESET);
+	src = flash_make_addr (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, FLASH_CMD_RESET);
 }
 
 #endif /* CFG_FLASH_PROTECTION */
 
-static int flash_poll_status(flash_info_t * info, flash_sect_t sect)
+/*
+ * 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) {
+
+	switch (info->vendor) {
 	case CFI_CMDSET_INTEL_STANDARD:
 	case CFI_CMDSET_INTEL_EXTENDED:
-		retval = !flash_isset(info, sect, 0, FLASH_STATUS_DONE);
+		retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 		break;
 	case CFI_CMDSET_AMD_STANDARD:
 	case CFI_CMDSET_AMD_EXTENDED:
-		retval =  flash_toggle(info, sect, 0, AMD_STATUS_TOGGLE);
+		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)
+static int flash_status_check (flash_info_t * info, flash_sect_t sector,
+			       ulong tout, char *prompt)
 {
 	ulong start;
 
 	/* Wait for command completion */
 	start = get_timer (0);
-	while (flash_poll_status(info, sector)) {
-		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, info->cmd_reset);
+	while (flash_is_busy (info, sector)) {
+		if (get_timer (start) > info->erase_blk_tout * CFG_HZ) {
+			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;
 		}
 	}
 	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)
+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) {
+
+	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)) {
+		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");
+			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");
+			} 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");
+			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);
+		flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
 		break;
 	default:
 		break;
 	}
 	return retcode;
 }
+
 /*-----------------------------------------------------------------------
  */
-static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c)
+static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 {
-	switch(info->portwidth) {
+	switch (info->portwidth) {
 	case FLASH_CFI_8BIT:
 		cword->c = c;
 		break;
@@ -606,47 +756,64 @@ static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar 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)
+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 defined(__LITTLE_ENDIAN)
+	ushort stmp;
+#endif
+	uchar *cp = (uchar *) cmdbuf;
+
+	for (i = 0; i < info->portwidth; i++)
+		*cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd;
+#if defined(__LITTLE_ENDIAN)
+	if (info->portwidth == 2) {
+		stmp = *(ushort *) cmdbuf;
+		*(ushort *) cmdbuf = swab16 (stmp);
+	}
+#endif
 }
 
 /*
  * 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)
+static void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
+			     uint 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) {
+
+	addr.cp = flash_make_addr (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.cp, cmd, cword.c,
-		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+		debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr.cp, cmd,
+		       cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 		*addr.cp = cword.c;
 		break;
 	case FLASH_CFI_16BIT:
-		debug("fwc addr %p cmd %x %4.4x 16bit x %d bit\n",addr.wp, cmd, cword.w,
+		debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr.wp,
+		       cmd, cword.w,
 		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 		*addr.wp = cword.w;
 		break;
 	case FLASH_CFI_32BIT:
-		debug("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n",addr.lp, cmd, cword.l,
+		debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr.lp,
+		       cmd, cword.l,
 		       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 		*addr.lp = cword.l;
 		break;
 	case FLASH_CFI_64BIT:
 #ifdef DEBUG
-	        {
+		{
 			char str[20];
-			print_longlong(str, cword.ll);
 
-			printf("fwc addr %p cmd %x %s 64 bit x %d bit\n",addr.llp, cmd, str,
+			print_longlong (str, cword.ll);
+
+			debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
+			       addr.llp, cmd, str,
 			       info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 		}
 #endif
@@ -655,43 +822,47 @@ static void flash_write_cmd(flash_info_t * info, flash_sect_t sect, uint offset,
 	}
 }
 
-static void flash_unlock_seq(flash_info_t *info)
+static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 {
-	flash_write_cmd(info, 0, 0x555, 0xAA);
-	flash_write_cmd(info, 0, 0x2AA, 0x55);
+	flash_write_cmd (info, sect, 0x555, 0xAA);
+	flash_write_cmd (info, sect, 0x2AA, 0x55);
 }
+
 /*-----------------------------------------------------------------------
  */
-static int flash_isequal(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint 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);
 
-	debug("is= cmd %x(%c) addr %p ", cmd,cmd, cptr.cp);
-	switch(info->portwidth) {
+	cptr.cp = flash_make_addr (info, sect, offset);
+	flash_make_cmd (info, cmd, &cword);
+
+	debug ("is= cmd %x(%c) addr %p ", cmd, cmd, cptr.cp);
+	switch (info->portwidth) {
 	case FLASH_CFI_8BIT:
-		debug("is= %x %x\n", cptr.cp[0], cword.c);
+		debug ("is= %x %x\n", cptr.cp[0], cword.c);
 		retval = (cptr.cp[0] == cword.c);
 		break;
 	case FLASH_CFI_16BIT:
-		debug("is= %4.4x %4.4x\n", cptr.wp[0], cword.w);
+		debug ("is= %4.4x %4.4x\n", cptr.wp[0], cword.w);
 		retval = (cptr.wp[0] == cword.w);
 		break;
 	case FLASH_CFI_32BIT:
-		debug("is= %8.8lx %8.8lx\n", cptr.lp[0], cword.l);
+		debug ("is= %8.8lx %8.8lx\n", cptr.lp[0], cword.l);
 		retval = (cptr.lp[0] == cword.l);
 		break;
 	case FLASH_CFI_64BIT:
 #ifdef DEBUG
-	        {
+		{
 			char str1[20];
 			char str2[20];
-			print_longlong(str1, cptr.llp[0]);
-			print_longlong(str2, cword.ll);
-			printf("is= %s %s\n", str1, str2);
+
+			print_longlong (str1, cptr.llp[0]);
+			print_longlong (str2, cword.ll);
+			debug ("is= %s %s\n", str1, str2);
 		}
 #endif
 		retval = (cptr.llp[0] == cword.ll);
@@ -702,16 +873,19 @@ static int flash_isequal(flash_info_t * info, flash_sect_t sect, uint offset, uc
 	}
 	return retval;
 }
+
 /*-----------------------------------------------------------------------
  */
-static int flash_isset(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+static int flash_isset (flash_info_t * info, flash_sect_t sect, uint 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) {
+
+	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;
@@ -723,6 +897,7 @@ static int flash_isset(flash_info_t * info, flash_sect_t sect, uint offset, ucha
 		break;
 	case FLASH_CFI_64BIT:
 		retval = ((cptr.llp[0] & cword.ll) == cword.ll);
+		break;
 	default:
 		retval = 0;
 		break;
@@ -732,14 +907,16 @@ static int flash_isset(flash_info_t * info, flash_sect_t sect, uint offset, ucha
 
 /*-----------------------------------------------------------------------
  */
-static int flash_toggle(flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
+static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint 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) {
+
+	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) != (cptr.cp[0] & cword.c));
 		break;
@@ -750,7 +927,8 @@ static int flash_toggle(flash_info_t * info, flash_sect_t sect, uint offset, uch
 		retval = ((cptr.lp[0] & cword.l) != (cptr.lp[0] & cword.l));
 		break;
 	case FLASH_CFI_64BIT:
-		retval = ((cptr.llp[0] & cword.ll) != (cptr.llp[0] & cword.ll));
+		retval = ((cptr.llp[0] & cword.ll) !=
+			  (cptr.llp[0] & cword.ll));
 		break;
 	default:
 		retval = 0;
@@ -764,55 +942,71 @@ static int flash_toggle(flash_info_t * info, flash_sect_t sect, uint offset, uch
  * http://www.jedec.org/download/search/jesd68.pdf
  *
 */
-static int flash_detect_cfi(flash_info_t * info)
+static int flash_detect_cfi (flash_info_t * info)
 {
+	debug ("flash detect cfi\n");
 
-    puts("flash detect cfi\n");
-
-	for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_64BIT;
-	    info->portwidth <<= 1) {
-	  /*		for(info->chipwidth = info->portwidth;
-			info->chipwidth > 0;
-			info->chipwidth >>= 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')) {
-				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);
+	for (info->portwidth = FLASH_CFI_8BIT;
+	     info->portwidth <= FLASH_CFI_64BIT; 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')) {
+				info->interface =
+					flash_read_ushort (info, 0,
+							   FLASH_OFFSET_INTERFACE);
+				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);
 				return 1;
 			}
 		}
 	}
-	puts("not found\n");
+	debug ("not found\n");
 	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];
+	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;
+	int erase_region_size;
+	int erase_region_count;
 
 	info->start[0] = base;
 
-	if(flash_detect_cfi(info)){
-		info->vendor = flash_read_ushort(info, 0, FLASH_OFFSET_PRIMARY_VENDOR);
-		switch(info->vendor) {
+	if (flash_detect_cfi (info)) {
+		info->vendor =
+			flash_read_ushort (info, 0,
+					   FLASH_OFFSET_PRIMARY_VENDOR);
+#ifdef DEBUG
+		flash_printqry (info, 0);
+#endif
+		switch (info->vendor) {
 		case CFI_CMDSET_INTEL_STANDARD:
 		case CFI_CMDSET_INTEL_EXTENDED:
 		default:
@@ -824,65 +1018,95 @@ static ulong flash_get_size (ulong base, int banknum)
 			break;
 		}
 
-		debug("manufacturer is %d\n", info->vendor);
+		debug ("manufacturer is %d\n", info->vendor);
 		size_ratio = info->portwidth / info->chipwidth;
-		num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS);
-		debug("size_ration %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);
+		/* 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;
+		}
+		num_erase_regions =
+			flash_read_uchar (info,
+					  FLASH_OFFSET_NUM_ERASE_REGIONS);
+		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);
+		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 + i*4);
-			erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128;
+			tmp = flash_read_long (info, 0,
+					       FLASH_OFFSET_ERASE_REGIONS +
+					       i * 4);
+			erase_region_size =
+				(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
 			tmp >>= 16;
-			erase_region_count = (tmp & 0xffff) +1;
-			for(j = 0; j< erase_region_count; j++) {
+			erase_region_count = (tmp & 0xffff) + 1;
+			printf ("erase_region_count = %d erase_region_size = %d\n", erase_region_count, erase_region_size);
+			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);
+				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->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);
+	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)
+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;
+	ctladdr.cp = flash_make_addr (info, 0, 0);
+	cptr.cp = (uchar *) dest;
 
 
 	/* Check if Flash is (sufficiently) erased */
-	switch(info->portwidth) {
+	switch (info->portwidth) {
 	case FLASH_CFI_8BIT:
 		flag = ((cptr.cp[0] & cword.c) == cword.c);
 		break;
@@ -890,7 +1114,7 @@ static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
 		flag = ((cptr.wp[0] & cword.w) == cword.w);
 		break;
 	case FLASH_CFI_32BIT:
-		flag = ((cptr.lp[0] & cword.l)	== cword.l);
+		flag = ((cptr.lp[0] & cword.l) == cword.l);
 		break;
 	case FLASH_CFI_64BIT:
 		flag = ((cptr.lp[0] & cword.ll) == cword.ll);
@@ -898,26 +1122,26 @@ static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
 	default:
 		return 2;
 	}
-	if(!flag)
+	if (!flag)
 		return 2;
 
 	/* Disable interrupts which might cause a timeout here */
-	flag = disable_interrupts();
+	flag = disable_interrupts ();
 
-	switch(info->vendor) {
+	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);
+		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:
-		flash_unlock_seq(info);
-		flash_write_cmd(info, 0, 0x555, AMD_CMD_WRITE);
+		flash_unlock_seq (info, 0);
+		flash_write_cmd (info, 0, 0x555, AMD_CMD_WRITE);
 		break;
 	}
 
-	switch(info->portwidth) {
+	switch (info->portwidth) {
 	case FLASH_CFI_8BIT:
 		cptr.cp[0] = cword.c;
 		break;
@@ -933,10 +1157,10 @@ static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
 	}
 
 	/* re-enable interrupts if necessary */
-	if(flag)
-		enable_interrupts();
+	if (flag)
+		enable_interrupts ();
 
-	return flash_full_status_check(info, 0, info->write_tout, "write");
+	return flash_full_status_check (info, 0, info->write_tout, "write");
 }
 
 #ifdef CFG_FLASH_USE_BUFFER_WRITE
@@ -945,17 +1169,19 @@ static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
  * 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)
+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])
+
+	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)
+static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
+				  int len)
 {
 	flash_sect_t sector;
 	int cnt;
@@ -964,13 +1190,15 @@ static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, in
 	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) {
+	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) {
+		/* reduce the number of loops by the width of the port	*/
+		switch (info->portwidth) {
 		case FLASH_CFI_8BIT:
 			cnt = len;
 			break;
@@ -987,9 +1215,9 @@ static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, in
 			return ERR_INVAL;
 			break;
 		}
-		flash_write_cmd(info, sector, 0, (uchar)cnt-1);
-		while(cnt-- > 0) {
-			switch(info->portwidth) {
+		flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
+		while (cnt-- > 0) {
+			switch (info->portwidth) {
 			case FLASH_CFI_8BIT:
 				*dst.cp++ = *src.cp++;
 				break;
@@ -1007,11 +1235,14 @@ static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, in
 				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_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);
+	flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 	return retcode;
 }
 #endif /* CFG_USE_FLASH_BUFFER_WRITE */