Initial revision

1 files changed, 744 insertions, 0 deletions

diff --git a/board/etx094/flash.c b/board/etx094/flash.c
new file mode 100644
index 0000000000..b3c620e868
--- /dev/null
+++ b/board/etx094/flash.c
@@ -0,0 +1,744 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	unsigned long size_b0, size_b1;
+	int i;
+
+	/* Init: no FLASHes known */
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	/* Static FLASH Bank configuration here - FIXME XXX */
+
+	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+			size_b0, size_b0<<20);
+	}
+
+	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
+
+	if (size_b1 > size_b0) {
+		printf ("## ERROR: "
+			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
+			size_b1, size_b1<<20,
+			size_b0, size_b0<<20
+		);
+		flash_info[0].flash_id	= FLASH_UNKNOWN;
+		flash_info[1].flash_id	= FLASH_UNKNOWN;
+		flash_info[0].sector_count	= -1;
+		flash_info[1].sector_count	= -1;
+		flash_info[0].size		= 0;
+		flash_info[1].size		= 0;
+		return (0);
+	}
+
+	/* Remap FLASH according to real size */
+	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+#ifdef CONFIG_FLASH_16BIT
+	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16; /* 16 Bit data port */
+#else
+	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
+#endif
+
+	/* Re-do sizing to get full correct info */
+	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+#endif
+
+	if (size_b1) {
+		memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
+#ifdef CONFIG_FLASH_16BIT
+		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+				    BR_MS_GPCM | BR_V | BR_PS_16;
+#else
+		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+				    BR_MS_GPCM | BR_V;
+#endif
+
+		/* Re-do sizing to get full correct info */
+		size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
+					  &flash_info[1]);
+
+		flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+		/* monitor protection ON by default */
+		flash_protect(FLAG_PROTECT_SET,
+			      CFG_MONITOR_BASE,
+			      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+			      &flash_info[1]);
+#endif
+	} else {
+		memctl->memc_br1 = 0;		/* invalidate bank */
+
+		flash_info[1].flash_id = FLASH_UNKNOWN;
+		flash_info[1].sector_count = -1;
+	}
+
+	flash_info[0].size = size_b0;
+	flash_info[1].size = size_b1;
+
+	return (size_b0 + size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00002000);
+		}
+		return;
+	}
+
+	/* set up sector start address table */
+	if (info->flash_id & FLASH_BTYPE) {
+		/* set sector offsets for bottom boot block type	*/
+#ifdef CONFIG_FLASH_16BIT
+		info->start[0] = base + 0x00000000;
+		info->start[1] = base + 0x00004000;
+		info->start[2] = base + 0x00006000;
+		info->start[3] = base + 0x00008000;
+		for (i = 4; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00010000) - 0x00030000;
+#else
+		info->start[0] = base + 0x00000000;
+		info->start[1] = base + 0x00008000;
+		info->start[2] = base + 0x0000C000;
+		info->start[3] = base + 0x00010000;
+		for (i = 4; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00020000) - 0x00060000;
+#endif
+		}
+	} else {
+		/* set sector offsets for top boot block type		*/
+		i = info->sector_count - 1;
+		info->start[i--] = base + info->size - 0x00008000;
+		info->start[i--] = base + info->size - 0x0000C000;
+		info->start[i--] = base + info->size - 0x00010000;
+		for (; i >= 0; i--) {
+			info->start[i] = base + i * 0x00020000;
+		}
+	}
+
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info  (flash_info_t *info)
+{
+	int i;
+
+	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_FUJ:	printf ("FUJITSU ");		break;
+	case FLASH_MAN_SST:	printf ("SST ");		break;
+	case FLASH_MAN_STM:	printf ("STM ");		break;
+	default:		printf ("Unknown Vendor ");	break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
+				break;
+	case FLASH_SST200A:	printf ("39xF200A (2M = 128K x 16)\n");
+				break;
+	case FLASH_SST400A:	printf ("39xF400A (4M = 256K x 16)\n");
+				break;
+	case FLASH_SST800A:	printf ("39xF800A (8M = 512K x 16)\n");
+				break;
+	case FLASH_STM800AB:	printf ("M29W800AB (8M = 512K x 16)\n");
+				break;
+	default:		printf ("Unknown Chip Type\n");
+				break;
+	}
+
+	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");
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+	short i;
+	ulong value;
+	ulong base = (ulong)addr;
+
+	/* Write auto select command: read Manufacturer ID */
+#ifdef CONFIG_FLASH_16BIT
+	vu_short *s_addr = (vu_short*)addr;
+	s_addr[0x5555] = 0x00AA;
+	s_addr[0x2AAA] = 0x0055;
+	s_addr[0x5555] = 0x0090;
+	value = s_addr[0];
+	value = value|(value<<16);
+#else
+	addr[0x5555] = 0x00AA00AA;
+	addr[0x2AAA] = 0x00550055;
+	addr[0x5555] = 0x00900090;
+	value = addr[0];
+#endif
+
+	switch (value) {
+	case AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case FUJ_MANUFACT:
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	case SST_MANUFACT:
+		info->flash_id = FLASH_MAN_SST;
+		break;
+	case STM_MANUFACT:
+		info->flash_id = FLASH_MAN_STM;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* no or unknown flash	*/
+	}
+#ifdef CONFIG_FLASH_16BIT
+	value = s_addr[1];
+	value = value|(value<<16);
+#else
+	value = addr[1];			/* device ID		*/
+#endif
+
+	switch (value) {
+	case AMD_ID_LV400T:
+		info->flash_id += FLASH_AM400T;
+		info->sector_count = 11;
+		info->size = 0x00100000;
+		break;				/* => 1 MB		*/
+
+	case AMD_ID_LV400B:
+		info->flash_id += FLASH_AM400B;
+		info->sector_count = 11;
+		info->size = 0x00100000;
+		break;				/* => 1 MB		*/
+
+	case AMD_ID_LV800T:
+		info->flash_id += FLASH_AM800T;
+		info->sector_count = 19;
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+
+	case AMD_ID_LV800B:
+		info->flash_id += FLASH_AM800B;
+#ifdef CONFIG_FLASH_16BIT
+		info->sector_count = 19;
+		info->size = 0x00100000;	/* => 1 MB */
+#else
+		info->sector_count = 19;
+		info->size = 0x00200000;	/* => 2 MB	*/
+#endif
+		break;
+
+	case AMD_ID_LV160T:
+		info->flash_id += FLASH_AM160T;
+		info->sector_count = 35;
+		info->size = 0x00400000;
+		break;				/* => 4 MB		*/
+
+	case AMD_ID_LV160B:
+		info->flash_id += FLASH_AM160B;
+#ifdef CONFIG_FLASH_16BIT
+		info->sector_count = 35;
+		info->size = 0x00200000;	/* => 2 MB	*/
+#else
+		info->sector_count = 35;
+		info->size = 0x00400000;	/* => 4 MB	*/
+#endif
+
+		break;
+#if 0	/* enable when device IDs are available */
+	case AMD_ID_LV320T:
+		info->flash_id += FLASH_AM320T;
+		info->sector_count = 67;
+		info->size = 0x00800000;
+		break;				/* => 8 MB		*/
+
+	case AMD_ID_LV320B:
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 67;
+		info->size = 0x00800000;
+		break;				/* => 8 MB		*/
+#endif
+	case SST_ID_xF200A:
+		info->flash_id += FLASH_SST200A;
+		info->sector_count = 64;	/* 39xF200A ID ( 2M = 128K x 16	) */
+		info->size = 0x00080000;
+		break;
+	case SST_ID_xF400A:
+		info->flash_id += FLASH_SST400A;
+		info->sector_count = 128;	/* 39xF400A ID ( 4M = 256K x 16	) */
+		info->size = 0x00100000;
+		break;
+	case SST_ID_xF800A:
+		info->flash_id += FLASH_SST800A;
+		info->sector_count = 256;	/* 39xF800A ID ( 8M = 512K x 16	) */
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+	case STM_ID_x800AB:
+		info->flash_id += FLASH_STM800AB;
+		info->sector_count = 19;
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		return (0);			/* => no or unknown flash */
+
+	}
+
+	if (info->sector_count > CFG_MAX_FLASH_SECT) {
+		printf ("** ERROR: sector count %d > max (%d) **\n",
+			info->sector_count, CFG_MAX_FLASH_SECT);
+		info->sector_count = CFG_MAX_FLASH_SECT;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00002000);
+		}
+	} else {	/* AMD and Fujitsu types */
+		/* set up sector start address table */
+		if (info->flash_id & FLASH_BTYPE) {
+			/* set sector offsets for bottom boot block type	*/
+#ifdef CONFIG_FLASH_16BIT
+
+			info->start[0] = base + 0x00000000;
+			info->start[1] = base + 0x00004000;
+			info->start[2] = base + 0x00006000;
+			info->start[3] = base + 0x00008000;
+			for (i = 4; i < info->sector_count; i++) {
+				info->start[i] = base + (i * 0x00010000) - 0x00030000;
+#else
+			info->start[0] = base + 0x00000000;
+			info->start[1] = base + 0x00008000;
+			info->start[2] = base + 0x0000C000;
+			info->start[3] = base + 0x00010000;
+			for (i = 4; i < info->sector_count; i++) {
+				info->start[i] = base + (i * 0x00020000) - 0x00060000;
+#endif
+			}
+		} else {
+			/* set sector offsets for top boot block type		*/
+			i = info->sector_count - 1;
+			info->start[i--] = base + info->size - 0x00008000;
+			info->start[i--] = base + info->size - 0x0000C000;
+			info->start[i--] = base + info->size - 0x00010000;
+			for (; i >= 0; i--) {
+				info->start[i] = base + i * 0x00020000;
+			}
+		}
+
+		/* check for protected sectors */
+		for (i = 0; i < info->sector_count; i++) {
+			/* read sector protection at sector address:
+			 * (A7 .. A0) = 0x02
+			 * D0 = 1 if protected
+			 */
+#ifdef CONFIG_FLASH_16BIT
+			s_addr = (volatile unsigned short *)(info->start[i]);
+			info->protect[i] = s_addr[2] & 1;
+#else
+			addr = (volatile unsigned long *)(info->start[i]);
+			info->protect[i] = addr[2] & 1;
+#endif
+		}
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+#ifdef CONFIG_FLASH_16BIT
+		s_addr = (volatile unsigned short *)(info->start[0]);
+		*s_addr = 0x00F0;	/* reset bank */
+#else
+		addr = (volatile unsigned long *)info->start[0];
+		*addr = 0x00F000F0;	/* reset bank */
+#endif
+
+	}
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	vu_long *addr = (vu_long*)(info->start[0]);
+	int flag, prot, sect;
+	ulong start, now, last;
+#ifdef CONFIG_FLASH_16BIT
+	vu_short *s_addr = (vu_short*)addr;
+#endif
+
+	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;
+	}
+/*#ifndef CONFIG_FLASH_16BIT
+	ulong type;
+	type = (info->flash_id & FLASH_VENDMASK);
+	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
+		printf ("Can't erase unknown flash type %08lx - aborted\n",
+			info->flash_id);
+		return;
+	}
+#endif*/
+	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; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+#ifdef CONFIG_FLASH_16BIT
+			vu_short *s_sect_addr = (vu_short*)(info->start[sect]);
+#else
+			vu_long	*sect_addr = (vu_long*)(info->start[sect]);
+#endif
+			/* Disable interrupts which might cause a timeout here */
+			flag = disable_interrupts();
+
+#ifdef CONFIG_FLASH_16BIT
+
+			/*printf("\ns_sect_addr=%x",s_sect_addr);*/
+			s_addr[0x5555] = 0x00AA;
+			s_addr[0x2AAA] = 0x0055;
+			s_addr[0x5555] = 0x0080;
+			s_addr[0x5555] = 0x00AA;
+			s_addr[0x2AAA] = 0x0055;
+			s_sect_addr[0] = 0x0030;
+#else
+			addr[0x5555] = 0x00AA00AA;
+			addr[0x2AAA] = 0x00550055;
+			addr[0x5555] = 0x00800080;
+			addr[0x5555] = 0x00AA00AA;
+			addr[0x2AAA] = 0x00550055;
+			sect_addr[0] = 0x00300030;
+#endif
+			/* re-enable interrupts if necessary */
+			if (flag)
+				enable_interrupts();
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+#ifdef CONFIG_FLASH_16BIT
+			while ((s_sect_addr[0] & 0x0080) != 0x0080) {
+#else
+			while ((sect_addr[0] & 0x00800080) != 0x00800080) {
+#endif
+				if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					return 1;
+				}
+				/* show that we're waiting */
+				if ((now - last) > 1000) {	/* every second */
+					putc ('.');
+					last = now;
+				}
+			}
+		}
+	}
+
+	/* reset to read mode */
+	addr = (volatile unsigned long *)info->start[0];
+#ifdef CONFIG_FLASH_16BIT
+	s_addr[0] = 0x00F0;	/* reset bank */
+#else
+	addr[0] = 0x00F000F0;	/* reset bank */
+#endif
+
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+
+	wp = (addr & ~3);	/* 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);
+		}
+		for (; i<4 && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<4; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 4;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 4) {
+		data = 0;
+		for (i=0; i<4; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp  += 4;
+		cnt -= 4;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i<4; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+	}
+
+	return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+	vu_long *addr = (vu_long*)(info->start[0]);
+
+#ifdef CONFIG_FLASH_16BIT
+	vu_short high_data;
+	vu_short low_data;
+	vu_short *s_addr = (vu_short*)addr;
+#endif
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_long *)dest) & data) != data) {
+		return (2);
+	}
+
+#ifdef CONFIG_FLASH_16BIT
+	/* Write the 16 higher-bits */
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	high_data = ((data>>16) & 0x0000ffff);
+
+	s_addr[0x5555] = 0x00AA;
+	s_addr[0x2AAA] = 0x0055;
+	s_addr[0x5555] = 0x00A0;
+
+	*((vu_short *)dest) = high_data;
+
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* data polling for D7 */
+	start = get_timer (0);
+	while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			return (1);
+		}
+	}
+
+
+	/* Write the 16 lower-bits */
+#endif
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+#ifdef CONFIG_FLASH_16BIT
+	dest += 0x2;
+	low_data = (data & 0x0000ffff);
+
+	s_addr[0x5555] = 0x00AA;
+	s_addr[0x2AAA] = 0x0055;
+	s_addr[0x5555] = 0x00A0;
+	*((vu_short *)dest) = low_data;
+
+#else
+	addr[0x5555] = 0x00AA00AA;
+	addr[0x2AAA] = 0x00550055;
+	addr[0x5555] = 0x00A000A0;
+	*((vu_long *)dest) = data;
+#endif
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* data polling for D7 */
+	start = get_timer (0);
+
+#ifdef CONFIG_FLASH_16BIT
+	while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {
+#else
+	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
+#endif
+
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			return (1);
+		}
+	}
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */