* Code cleanup

* Patch by Sascha Hauer, 28 Jun:
  - add generic support for Motorola i.MX architecture
  - add support for mx1ads, mx1fs2 and scb9328 boards

* Patches by Marc Leeman, 23 Jul 2004:
  - Add define for the PCI/Memory Buffer Configuration Register
  - corrected comments in cpu/mpc824x/cpu_init.c

* Add support for multiple serial interfaces
  (for example to allow modem dial-in / dial-out)

1 files changed, 914 insertions, 0 deletions

diff --git a/board/mx1fs2/flash.c b/board/mx1fs2/flash.c
new file mode 100644
index 00000000000..3a79a9eb4b1
--- /dev/null
+++ b/board/mx1fs2/flash.c
@@ -0,0 +1,914 @@
+/*
+ * (C) 2000-2004 Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) 2003 August Hoeraendl, Logotronic GmbH
+ *
+ * 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
+ */
+
+#undef CONFIG_FLASH_16BIT
+
+#include <common.h>
+
+#if defined CFG_JFFS_CUSTOM_PART
+#include <jffs2/jffs2.h>
+#endif
+
+#define FLASH_BANK_SIZE MX1FS2_FLASH_BANK_SIZE
+#define MAIN_SECT_SIZE  MX1FS2_FLASH_SECT_SIZE
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips   */
+
+/*
+ * NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
+ *        has nothing to do with the flash chip being 8-bit or 16-bit.
+ */
+#ifdef CONFIG_FLASH_16BIT
+typedef unsigned short FLASH_PORT_WIDTH;
+typedef volatile unsigned short FLASH_PORT_WIDTHV;
+
+#define	FLASH_ID_MASK	0xFFFF
+#else
+typedef unsigned long FLASH_PORT_WIDTH;
+typedef volatile unsigned long FLASH_PORT_WIDTHV;
+
+#define	FLASH_ID_MASK	0xFFFFFFFF
+#endif
+
+#define FPW	FLASH_PORT_WIDTH
+#define FPWV	FLASH_PORT_WIDTHV
+
+#define ORMASK(size) ((-size) & OR_AM_MSK)
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+#if 0
+static ulong flash_get_size(FPWV * addr, flash_info_t * info);
+static void flash_get_offsets(ulong base, flash_info_t * info);
+#endif
+static void flash_reset(flash_info_t * info);
+static int write_word_intel(flash_info_t * info, FPWV * dest, FPW data);
+static int write_word_amd(flash_info_t * info, FPWV * dest, FPW data);
+#define write_word(in, de, da)   write_word_amd(in, de, da)
+#ifdef CFG_FLASH_PROTECTION
+static void flash_sync_real_protect(flash_info_t * info);
+#endif
+
+#if defined CFG_JFFS_CUSTOM_PART
+
+/**
+ * jffs2_part_info - get information about a JFFS2 partition
+ *
+ * @part_num: number of the partition you want to get info about
+ * @return:   struct part_info* in case of success, 0 if failure
+ */
+
+static struct part_info part;
+static int current_part = -1;
+
+struct part_info *
+jffs2_part_info(int part_num)
+{
+	void *jffs2_priv_saved = part.jffs2_priv;
+
+	printf("jffs2_part_info: part_num=%i\n", part_num);
+
+	if (current_part == part_num)
+		return &part;
+
+	/* rootfs                                                 */
+	if (part_num == 0) {
+		memset(&part, 0, sizeof (part));
+
+		part.offset = (char *) MX1FS2_JFFS2_PART0_START;
+		part.size = MX1FS2_JFFS2_PART0_SIZE;
+
+		/* Mark the struct as ready */
+		current_part = part_num;
+
+		printf("part.offset = 0x%08x\n", (unsigned int) part.offset);
+		printf("part.size   = 0x%08x\n", (unsigned int) part.size);
+	}
+
+	/* userfs                                    */
+	if (part_num == 1) {
+		memset(&part, 0, sizeof (part));
+
+		part.offset = (char *) MX1FS2_JFFS2_PART1_START;
+		part.size = MX1FS2_JFFS2_PART1_SIZE;
+
+		/* Mark the struct as ready */
+		current_part = part_num;
+
+		printf("part.offset = 0x%08x\n", (unsigned int) part.offset);
+		printf("part.size   = 0x%08x\n", (unsigned int) part.size);
+	}
+
+	if (current_part == part_num) {
+		part.usr_priv = &current_part;
+		part.jffs2_priv = jffs2_priv_saved;
+		return &part;
+	}
+
+	printf("jffs2_part_info: end of partition table\n");
+	return 0;
+}
+#endif				/* CFG_JFFS_CUSTOM_PART */
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+ulong
+flash_init(void)
+{
+	int i, j;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+		flash_info[i].flash_id =
+		    (FLASH_MAN_AMD & FLASH_VENDMASK) |
+		    (FLASH_AM640U & FLASH_TYPEMASK);
+		flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+		switch (i) {
+		case 0:
+			flashbase = MX1FS2_FLASH_BASE;
+			break;
+		default:
+			panic("configured too many flash banks!\n");
+			break;
+		}
+		for (j = 0; j < flash_info[i].sector_count; j++) {
+			flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE;
+		}
+		size += flash_info[i].size;
+	}
+
+	/* Protect monitor and environment sectors */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_FLASH_BASE,
+		      CFG_FLASH_BASE + _bss_start - _armboot_start,
+		      &flash_info[0]);
+
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_ENV_ADDR,
+		      CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+
+	return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void
+flash_reset(flash_info_t * info)
+{
+	FPWV *base = (FPWV *) (info->start[0]);
+
+	/* Put FLASH back in read mode */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+		*base = (FPW) 0x00FF00FF;	/* Intel Read Mode */
+	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
+		*base = (FPW) 0x00F000F0;	/* AMD Read Mode */
+}
+
+/*-----------------------------------------------------------------------
+ */
+#if 0
+static void
+flash_get_offsets(ulong base, flash_info_t * info)
+{
+	int i;
+
+	/* set up sector start address table */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL
+	    && (info->flash_id & FLASH_BTYPE)) {
+		int bootsect_size;	/* number of bytes/boot sector  */
+		int sect_size;	/* number of bytes/regular sector */
+
+		bootsect_size = 0x00002000 * (sizeof (FPW) / 2);
+		sect_size = 0x00010000 * (sizeof (FPW) / 2);
+
+		/* set sector offsets for bottom boot block type        */
+		for (i = 0; i < 8; ++i) {
+			info->start[i] = base + (i * bootsect_size);
+		}
+		for (i = 8; i < info->sector_count; i++) {
+			info->start[i] = base + ((i - 7) * sect_size);
+		}
+	} else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
+		   && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) {
+
+		int sect_size;	/* number of bytes/sector */
+
+		sect_size = 0x00010000 * (sizeof (FPW) / 2);
+
+		/* set up sector start address table (uniform sector type) */
+		for (i = 0; i < info->sector_count; i++)
+			info->start[i] = base + (i * sect_size);
+	}
+}
+#endif /* 0 */
+
+/*-----------------------------------------------------------------------
+ */
+
+void
+flash_print_info(flash_info_t * info)
+{
+	int i;
+	uchar *boottype;
+	uchar *bootletter;
+	uchar *fmt;
+	uchar botbootletter[] = "B";
+	uchar topbootletter[] = "T";
+	uchar botboottype[] = "bottom boot sector";
+	uchar topboottype[] = "top boot sector";
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:
+		printf("AMD ");
+		break;
+	case FLASH_MAN_BM:
+		printf("BRIGHT MICRO ");
+		break;
+	case FLASH_MAN_FUJ:
+		printf("FUJITSU ");
+		break;
+	case FLASH_MAN_SST:
+		printf("SST ");
+		break;
+	case FLASH_MAN_STM:
+		printf("STM ");
+		break;
+	case FLASH_MAN_INTEL:
+		printf("INTEL ");
+		break;
+	default:
+		printf("Unknown Vendor ");
+		break;
+	}
+
+	/* check for top or bottom boot, if it applies */
+	if (info->flash_id & FLASH_BTYPE) {
+		boottype = botboottype;
+		bootletter = botbootletter;
+	} else {
+		boottype = topboottype;
+		bootletter = topbootletter;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM640U:
+		fmt = "29LV641D (64 Mbit, uniform sectors)\n";
+		break;
+	case FLASH_28F800C3B:
+	case FLASH_28F800C3T:
+		fmt = "28F800C3%s (8 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL800B:
+	case FLASH_INTEL800T:
+		fmt = "28F800B3%s (8 Mbit, %s)\n";
+		break;
+	case FLASH_28F160C3B:
+	case FLASH_28F160C3T:
+		fmt = "28F160C3%s (16 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL160B:
+	case FLASH_INTEL160T:
+		fmt = "28F160B3%s (16 Mbit, %s)\n";
+		break;
+	case FLASH_28F320C3B:
+	case FLASH_28F320C3T:
+		fmt = "28F320C3%s (32 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL320B:
+	case FLASH_INTEL320T:
+		fmt = "28F320B3%s (32 Mbit, %s)\n";
+		break;
+	case FLASH_28F640C3B:
+	case FLASH_28F640C3T:
+		fmt = "28F640C3%s (64 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL640B:
+	case FLASH_INTEL640T:
+		fmt = "28F640B3%s (64 Mbit, %s)\n";
+		break;
+	default:
+		fmt = "Unknown Chip Type\n";
+		break;
+	}
+
+	printf(fmt, bootletter, boottype);
+
+	printf("  Size: %ld MB in %d Sectors\n",
+	       info->size >> 20, info->sector_count);
+
+	printf("  Sector Start Addresses:");
+
+	for (i = 0; i < info->sector_count; ++i) {
+		if ((i % 5) == 0) {
+			printf("\n   ");
+		}
+
+		printf(" %08lX%s", info->start[i],
+		       info->protect[i] ? " (RO)" : "     ");
+	}
+
+	printf("\n");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+#if 0
+ulong
+flash_get_size(FPWV * addr, flash_info_t * info)
+{
+	/* Write auto select command: read Manufacturer ID */
+
+	/* Write auto select command sequence and test FLASH answer */
+	addr[0x0555] = (FPW) 0x00AA00AA;	/* for AMD, Intel ignores this */
+	addr[0x02AA] = (FPW) 0x00550055;	/* for AMD, Intel ignores this */
+	addr[0x0555] = (FPW) 0x00900090;	/* selects Intel or AMD */
+
+	/* The manufacturer codes are only 1 byte, so just use 1 byte.
+	 * This works for any bus width and any FLASH device width.
+	 */
+	switch (addr[0] & 0xff) {
+
+	case (uchar) AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+
+	case (uchar) INTEL_MANUFACT:
+		info->flash_id = FLASH_MAN_INTEL;
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		break;
+	}
+
+	/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
+	if (info->flash_id != FLASH_UNKNOWN)
+		switch (addr[1]) {
+
+		case (FPW) AMD_ID_LV640U:	/* 29LV640 and 29LV641 have same ID */
+			info->flash_id += FLASH_AM640U;
+			info->sector_count = 128;
+			info->size = 0x00800000 * (sizeof (FPW) / 2);
+			break;	/* => 8 or 16 MB        */
+
+		case (FPW) INTEL_ID_28F800C3B:
+			info->flash_id += FLASH_28F800C3B;
+			info->sector_count = 23;
+			info->size = 0x00100000 * (sizeof (FPW) / 2);
+			break;	/* => 1 or 2 MB         */
+
+		case (FPW) INTEL_ID_28F800B3B:
+			info->flash_id += FLASH_INTEL800B;
+			info->sector_count = 23;
+			info->size = 0x00100000 * (sizeof (FPW) / 2);
+			break;	/* => 1 or 2 MB         */
+
+		case (FPW) INTEL_ID_28F160C3B:
+			info->flash_id += FLASH_28F160C3B;
+			info->sector_count = 39;
+			info->size = 0x00200000 * (sizeof (FPW) / 2);
+			break;	/* => 2 or 4 MB         */
+
+		case (FPW) INTEL_ID_28F160B3B:
+			info->flash_id += FLASH_INTEL160B;
+			info->sector_count = 39;
+			info->size = 0x00200000 * (sizeof (FPW) / 2);
+			break;	/* => 2 or 4 MB         */
+
+		case (FPW) INTEL_ID_28F320C3B:
+			info->flash_id += FLASH_28F320C3B;
+			info->sector_count = 71;
+			info->size = 0x00400000 * (sizeof (FPW) / 2);
+			break;	/* => 4 or 8 MB         */
+
+		case (FPW) INTEL_ID_28F320B3B:
+			info->flash_id += FLASH_INTEL320B;
+			info->sector_count = 71;
+			info->size = 0x00400000 * (sizeof (FPW) / 2);
+			break;	/* => 4 or 8 MB         */
+
+		case (FPW) INTEL_ID_28F640C3B:
+			info->flash_id += FLASH_28F640C3B;
+			info->sector_count = 135;
+			info->size = 0x00800000 * (sizeof (FPW) / 2);
+			break;	/* => 8 or 16 MB        */
+
+		case (FPW) INTEL_ID_28F640B3B:
+			info->flash_id += FLASH_INTEL640B;
+			info->sector_count = 135;
+			info->size = 0x00800000 * (sizeof (FPW) / 2);
+			break;	/* => 8 or 16 MB        */
+
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			info->sector_count = 0;
+			info->size = 0;
+			return (0);	/* => no or unknown flash */
+		}
+
+	flash_get_offsets((ulong) addr, info);
+
+	/* Put FLASH back in read mode */
+	flash_reset(info);
+
+	return (info->size);
+}
+#endif /* 0 */
+
+#ifdef CFG_FLASH_PROTECTION
+/*-----------------------------------------------------------------------
+ */
+
+static void
+flash_sync_real_protect(flash_info_t * info)
+{
+	FPWV *addr = (FPWV *) (info->start[0]);
+	FPWV *sect;
+	int i;
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F800C3B:
+	case FLASH_28F800C3T:
+	case FLASH_28F160C3B:
+	case FLASH_28F160C3T:
+	case FLASH_28F320C3B:
+	case FLASH_28F320C3T:
+	case FLASH_28F640C3B:
+	case FLASH_28F640C3T:
+		/* check for protected sectors */
+		*addr = (FPW) 0x00900090;
+		for (i = 0; i < info->sector_count; i++) {
+			/* read sector protection at sector address, (A7 .. A0) = 0x02.
+			 * D0 = 1 for each device if protected.
+			 * If at least one device is protected the sector is marked
+			 * protected, but mixed protected and  unprotected devices
+			 * within a sector should never happen.
+			 */
+			sect = (FPWV *) (info->start[i]);
+			info->protect[i] =
+			    (sect[2] & (FPW) (0x00010001)) ? 1 : 0;
+		}
+
+		/* Put FLASH back in read mode */
+		flash_reset(info);
+		break;
+
+	case FLASH_AM640U:
+	default:
+		/* no hardware protect that we support */
+		break;
+	}
+}
+#endif
+
+/*-----------------------------------------------------------------------
+ */
+
+int
+flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+	FPWV *addr;
+	int flag, prot, sect;
+	int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
+	ulong start, now, last;
+	int rcode = 0;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		if (info->flash_id == FLASH_UNKNOWN) {
+			printf("- missing\n");
+		} else {
+			printf("- no sectors to erase\n");
+		}
+		return 1;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_INTEL800B:
+	case FLASH_INTEL160B:
+	case FLASH_INTEL320B:
+	case FLASH_INTEL640B:
+	case FLASH_28F800C3B:
+	case FLASH_28F160C3B:
+	case FLASH_28F320C3B:
+	case FLASH_28F640C3B:
+	case FLASH_AM640U:
+		break;
+	case FLASH_UNKNOWN:
+	default:
+		printf("Can't erase unknown flash type %08lx - aborted\n",
+		       info->flash_id);
+		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");
+	}
+
+	start = get_timer(0);
+	last = start;
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && rcode == 0; sect++) {
+
+		if (info->protect[sect] != 0)	/* protected, skip it */
+			continue;
+
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr = (FPWV *) (info->start[sect]);
+		if (intel) {
+			*addr = (FPW) 0x00500050;	/* clear status register */
+			*addr = (FPW) 0x00200020;	/* erase setup */
+			*addr = (FPW) 0x00D000D0;	/* erase confirm */
+		} else {
+			/* must be AMD style if not Intel */
+			FPWV *base;	/* first address in bank */
+
+			base = (FPWV *) (info->start[0]);
+			base[0x0555] = (FPW) 0x00AA00AA;	/* unlock */
+			base[0x02AA] = (FPW) 0x00550055;	/* unlock */
+			base[0x0555] = (FPW) 0x00800080;	/* erase mode */
+			base[0x0555] = (FPW) 0x00AA00AA;	/* unlock */
+			base[0x02AA] = (FPW) 0x00550055;	/* unlock */
+			*addr = (FPW) 0x00300030;	/* erase sector */
+		}
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* wait at least 50us for AMD, 80us for Intel.
+		 * Let's wait 1 ms.
+		 */
+		udelay(1000);
+
+		while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
+			if ((now = get_timer(0)) - start > CFG_FLASH_ERASE_TOUT) {
+				printf("Timeout\n");
+
+				if (intel) {
+					/* suspend erase        */
+					*addr = (FPW) 0x00B000B0;
+				}
+
+				flash_reset(info);	/* reset to read mode */
+				rcode = 1;	/* failed */
+				break;
+			}
+
+			/* show that we're waiting */
+			if ((now - last) > 1000) {	/* every second */
+				putc('.');
+				last = now;
+			}
+		}
+
+		flash_reset(info);	/* reset to read mode   */
+	}
+
+	printf(" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int
+bad_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	FPW data = 0;		/* 16 or 32 bit word, matches flash bus width on MPC8XX */
+	int bytes;		/* number of bytes to program in current word         */
+	int left;		/* number of bytes left to program                    */
+	int i, res;
+
+	for (left = cnt, res = 0;
+	     left > 0 && res == 0;
+	     addr += sizeof (data), left -= sizeof (data) - bytes) {
+
+		bytes = addr & (sizeof (data) - 1);
+		addr &= ~(sizeof (data) - 1);
+
+		/* combine source and destination data so can program
+		 * an entire word of 16 or 32 bits
+		 */
+		for (i = 0; i < sizeof (data); i++) {
+			data <<= 8;
+			if (i < bytes || i - bytes >= left)
+				data += *((uchar *) addr + i);
+			else
+				data += *src++;
+		}
+
+		/* write one word to the flash */
+		switch (info->flash_id & FLASH_VENDMASK) {
+		case FLASH_MAN_AMD:
+			res = write_word_amd(info, (FPWV *) addr, data);
+			break;
+		case FLASH_MAN_INTEL:
+			res = write_word_intel(info, (FPWV *) addr, data);
+			break;
+		default:
+			/* unknown flash type, error! */
+			printf("missing or unknown FLASH type\n");
+			res = 1;	/* not really a timeout, but gives error */
+			break;
+		}
+	}
+
+	return (res);
+}
+
+/**
+ * write_buf: - Copy memory to flash.
+ *
+ * @param info:
+ * @param src:	source of copy transaction
+ * @param addr:	where to copy to
+ * @param cnt: 	number of bytes to copy
+ *
+ * @return	error code
+ */
+
+int
+write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	FPW data;
+	int l;
+	int i, rc;
+
+	wp = (addr & ~1);	/* get lower word aligned address */
+
+	/* handle unaligned start bytes */
+	if ((l = addr - wp) != 0) {
+		data = 0;
+		for (i = 0, cp = wp; i < l; ++i, ++cp) {
+			data = (data >> 8) | (*(uchar *) cp << 8);
+		}
+		for (; i < 2 && cnt > 0; ++i) {
+			data = (data >> 8) | (*src++ << 8);
+			--cnt;
+			++cp;
+		}
+		for (; cnt == 0 && i < 2; ++i, ++cp) {
+			data = (data >> 8) | (*(uchar *) cp << 8);
+		}
+
+		if ((rc = write_word(info, (FPWV *)wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 2;
+	}
+
+	/* handle word aligned part */
+	while (cnt >= 2) {
+		/* data = *((vushort*)src); */
+		data = *((FPW *) src);
+		if ((rc = write_word(info, (FPWV *)wp, data)) != 0) {
+			return (rc);
+		}
+		src += sizeof (FPW);
+		wp += sizeof (FPW);
+		cnt -= sizeof (FPW);
+	}
+
+	if (cnt == 0)
+		return ERR_OK;
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
+		data = (data >> 8) | (*src++ << 8);
+		--cnt;
+	}
+	for (; i < 2; ++i, ++cp) {
+		data = (data >> 8) | (*(uchar *) cp << 8);
+	}
+
+	return write_word(info, (FPWV *)wp, data);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for AMD FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int
+write_word_amd(flash_info_t * info, FPWV * dest, FPW data)
+{
+	ulong start;
+	int flag;
+	int res = 0;		/* result, assume success       */
+	FPWV *base;		/* first address in flash bank  */
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*dest & data) != data) {
+		return (2);
+	}
+
+	base = (FPWV *) (info->start[0]);
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	base[0x0555] = (FPW) 0x00AA00AA;	/* unlock */
+	base[0x02AA] = (FPW) 0x00550055;	/* unlock */
+	base[0x0555] = (FPW) 0x00A000A0;	/* selects program mode */
+
+	*dest = data;		/* start programming the data   */
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	start = get_timer(0);
+
+	/* data polling for D7 */
+	while (res == 0
+	       && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
+		if (get_timer(0) - start > CFG_FLASH_WRITE_TOUT) {
+			*dest = (FPW) 0x00F000F0;	/* reset bank */
+			printf("SHA timeout\n");
+			res = 1;
+		}
+	}
+
+	return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for Intel FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int
+write_word_intel(flash_info_t * info, FPWV * dest, FPW data)
+{
+	ulong start;
+	int flag;
+	int res = 0;		/* result, assume success       */
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*dest & data) != data) {
+		return (2);
+	}
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	*dest = (FPW) 0x00500050;	/* clear status register        */
+	*dest = (FPW) 0x00FF00FF;	/* make sure in read mode       */
+	*dest = (FPW) 0x00400040;	/* program setup                */
+
+	*dest = data;		/* start programming the data   */
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	start = get_timer(0);
+
+	while (res == 0 && (*dest & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			*dest = (FPW) 0x00B000B0;	/* Suspend program      */
+			res = 1;
+		}
+	}
+
+	if (res == 0 && (*dest & (FPW) 0x00100010))
+		res = 1;	/* write failed, time out error is close enough */
+
+	*dest = (FPW) 0x00500050;	/* clear status register        */
+	*dest = (FPW) 0x00FF00FF;	/* make sure in read mode       */
+
+	return (res);
+}
+
+#ifdef CFG_FLASH_PROTECTION
+/*-----------------------------------------------------------------------
+ */
+int
+flash_real_protect(flash_info_t * info, long sector, int prot)
+{
+	int rcode = 0;		/* assume success */
+	FPWV *addr;		/* address of sector */
+	FPW value;
+
+	addr = (FPWV *) (info->start[sector]);
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F800C3B:
+	case FLASH_28F800C3T:
+	case FLASH_28F160C3B:
+	case FLASH_28F160C3T:
+	case FLASH_28F320C3B:
+	case FLASH_28F320C3T:
+	case FLASH_28F640C3B:
+	case FLASH_28F640C3T:
+		flash_reset(info);	/* make sure in read mode */
+		*addr = (FPW) 0x00600060L;	/* lock command setup */
+		if (prot)
+			*addr = (FPW) 0x00010001L;	/* lock sector */
+		else
+			*addr = (FPW) 0x00D000D0L;	/* unlock sector */
+		flash_reset(info);	/* reset to read mode */
+
+		/* now see if it really is locked/unlocked as requested */
+		*addr = (FPW) 0x00900090;
+		/* read sector protection at sector address, (A7 .. A0) = 0x02.
+		 * D0 = 1 for each device if protected.
+		 * If at least one device is protected the sector is marked
+		 * protected, but return failure. Mixed protected and
+		 * unprotected devices within a sector should never happen.
+		 */
+		value = addr[2] & (FPW) 0x00010001;
+		if (value == 0)
+			info->protect[sector] = 0;
+		else if (value == (FPW) 0x00010001)
+			info->protect[sector] = 1;
+		else {
+			/* error, mixed protected and unprotected */
+			rcode = 1;
+			info->protect[sector] = 1;
+		}
+		if (info->protect[sector] != prot)
+			rcode = 1;	/* failed to protect/unprotect as requested */
+
+		/* reload all protection bits from hardware for now */
+		flash_sync_real_protect(info);
+		break;
+
+	case FLASH_AM640U:
+	default:
+		/* no hardware protect that we support */
+		info->protect[sector] = prot;
+		break;
+	}
+
+	return rcode;
+}
+#endif