Patch by TsiChung Liew, 23 Sep 2004:

- add support for MPC8220 CPU
- Add support for Alaska and Yukon boards

1 files changed, 807 insertions, 0 deletions

diff --git a/board/alaska/flash.c b/board/alaska/flash.c
new file mode 100644
index 0000000..48c9472
--- /dev/null
+++ b/board/alaska/flash.c
@@ -0,0 +1,807 @@
+/*
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2001-2004
+ * 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 <linux/byteorder/swab.h>
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips    */
+
+/* Board support for 1 or 2 flash devices */
+#define FLASH_PORT_WIDTH8
+
+typedef unsigned char FLASH_PORT_WIDTH;
+typedef volatile unsigned char FLASH_PORT_WIDTHV;
+
+#define SWAP(x)         (x)
+
+/* Intel-compatible flash ID */
+#define INTEL_COMPAT    0x89
+#define INTEL_ALT       0xB0
+
+/* Intel-compatible flash commands */
+#define INTEL_PROGRAM   0x10
+#define INTEL_ERASE     0x20
+#define INTEL_CLEAR     0x50
+#define INTEL_LOCKBIT   0x60
+#define INTEL_PROTECT   0x01
+#define INTEL_STATUS    0x70
+#define INTEL_READID    0x90
+#define INTEL_CONFIRM   0xD0
+#define INTEL_RESET     0xFF
+
+/* Intel-compatible flash status bits */
+#define INTEL_FINISHED  0x80
+#define INTEL_OK        0x80
+
+#define FPW             FLASH_PORT_WIDTH
+#define FPWV            FLASH_PORT_WIDTHV
+
+#define FLASH_CYCLE1    0x0555
+#define FLASH_CYCLE2    0x02aa
+
+#define WR_BLOCK        0x20
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (FPW * addr, flash_info_t * info);
+static int write_data (flash_info_t * info, ulong dest, FPW data);
+static int write_data_block (flash_info_t * info, ulong src, ulong dest);
+static int write_word_amd (flash_info_t * info, FPWV * dest, FPW data);
+static void flash_get_offsets (ulong base, flash_info_t * info);
+void inline spin_wheel (void);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	int i;
+	ulong size = 0;
+	ulong fsize = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		memset (&flash_info[i], 0, sizeof (flash_info_t));
+
+		switch (i) {
+		case 0:
+			flash_get_size ((FPW *) CFG_FLASH1_BASE,
+					&flash_info[i]);
+			flash_get_offsets (CFG_FLASH1_BASE, &flash_info[i]);
+			break;
+		case 1:
+			flash_get_size ((FPW *) CFG_FLASH1_BASE,
+					&flash_info[i]);
+			fsize = CFG_FLASH1_BASE + flash_info[i - 1].size;
+			flash_get_offsets (fsize, &flash_info[i]);
+			break;
+		case 2:
+			flash_get_size ((FPW *) CFG_FLASH0_BASE,
+					&flash_info[i]);
+			flash_get_offsets (CFG_FLASH0_BASE, &flash_info[i]);
+			break;
+		case 3:
+			flash_get_size ((FPW *) CFG_FLASH0_BASE,
+					&flash_info[i]);
+			fsize = CFG_FLASH0_BASE + flash_info[i - 1].size;
+			flash_get_offsets (fsize, &flash_info[i]);
+			break;
+		default:
+			panic ("configured to many flash banks!\n");
+			break;
+		}
+		size += flash_info[i].size;
+	}
+
+	/* Protect monitor and environment sectors
+	 */
+#if defined (CFG_AMD_BOOT)
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_MONITOR_BASE,
+		       CFG_MONITOR_BASE + monitor_flash_len - 1,
+		       &flash_info[2]);
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_INTEL_BASE,
+		       CFG_INTEL_BASE + monitor_flash_len - 1,
+		       &flash_info[1]);
+#else
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_MONITOR_BASE,
+		       CFG_MONITOR_BASE + monitor_flash_len - 1,
+		       &flash_info[3]);
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_AMD_BASE,
+		       CFG_AMD_BASE + monitor_flash_len - 1, &flash_info[0]);
+#endif
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV1_ADDR,
+		       CFG_ENV1_ADDR + CFG_ENV1_SIZE - 1, &flash_info[1]);
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV_ADDR,
+		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[3]);
+
+	return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_AMD) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * PHYS_AMD_SECT_SIZE);
+			info->protect[i] = 0;
+		}
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * PHYS_INTEL_SECT_SIZE);
+			info->protect[i] = 0;
+		}
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_INTEL:
+		printf ("INTEL ");
+		break;
+	case FLASH_MAN_AMD:
+		printf ("AMD ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F128J3A:
+		printf ("28F128J3A\n");
+		break;
+
+	case FLASH_AM040:
+		printf ("AMD29F040B\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 (FPW * addr, flash_info_t * info)
+{
+	FPWV value;
+	static int amd = 0;
+
+	/* Write auto select command: read Manufacturer ID */
+	/* Write auto select command sequence and test FLASH answer */
+	addr[FLASH_CYCLE1] = (FPW) 0x00AA00AA;	/* for AMD, Intel ignores this */
+	__asm__ ("sync");
+	addr[FLASH_CYCLE2] = (FPW) 0x00550055;	/* for AMD, Intel ignores this */
+	__asm__ ("sync");
+	addr[FLASH_CYCLE1] = (FPW) 0x00900090;	/* selects Intel or AMD */
+	__asm__ ("sync");
+
+	udelay (100);
+
+	switch (addr[0] & 0xff) {
+
+	case (uchar) AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		value = addr[1];
+		break;
+
+	case (uchar) INTEL_MANUFACT:
+		info->flash_id = FLASH_MAN_INTEL;
+		value = addr[2];
+		break;
+
+	default:
+		printf ("unknown\n");
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
+		return (0);	/* no or unknown flash  */
+	}
+
+	switch (value) {
+
+	case (FPW) INTEL_ID_28F128J3A:
+		info->flash_id += FLASH_28F128J3A;
+		info->sector_count = 64;
+		info->size = 0x00800000;	/* => 16 MB     */
+		break;
+
+	case (FPW) AMD_ID_LV040B:
+		info->flash_id += FLASH_AM040;
+		if (amd == 0) {
+			info->sector_count = 7;
+			info->size = 0x00070000;	/* => 448 KB     */
+			amd = 1;
+		} else {
+			/* for Environment settings */
+			info->sector_count = 1;
+			info->size = PHYS_AMD_SECT_SIZE;	/* => 64 KB     */
+			amd = 0;
+		}
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		break;
+	}
+
+	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 (value == (FPW) INTEL_ID_28F128J3A)
+		addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
+	else
+		addr[0] = (FPW) 0x00F000F0;	/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	ulong type, start, last;
+	int rcode = 0, intel = 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;
+	}
+
+	type = (info->flash_id & FLASH_VENDMASK);
+	if ((type != FLASH_MAN_INTEL)) {
+		type = (info->flash_id & FLASH_VENDMASK);
+		if ((type != FLASH_MAN_AMD)) {
+			printf ("Can't erase unknown flash type %08lx - aborted\n",
+				info->flash_id);
+			return 1;
+		}
+	}
+
+	if (type == FLASH_MAN_INTEL)
+		intel = 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;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			FPWV *addr = (FPWV *) (info->start[sect]);
+			FPW status;
+
+			printf ("Erasing sector %2d ... ", sect);
+
+			/* arm simple, non interrupt dependent timer */
+			start = get_timer (0);
+
+			if (intel) {
+				*addr = (FPW) 0x00500050;	/* clear status register */
+				*addr = (FPW) 0x00200020;	/* erase setup */
+				*addr = (FPW) 0x00D000D0;	/* erase confirm */
+			} else {
+				FPWV *base;	/* first address in bank */
+
+				base = (FPWV *) (CFG_AMD_BASE);
+				base[FLASH_CYCLE1] = (FPW) 0x00AA00AA;	/* unlock */
+				base[FLASH_CYCLE2] = (FPW) 0x00550055;	/* unlock */
+				base[FLASH_CYCLE1] = (FPW) 0x00800080;	/* erase mode */
+				base[FLASH_CYCLE1] = (FPW) 0x00AA00AA;	/* unlock */
+				base[FLASH_CYCLE2] = (FPW) 0x00550055;	/* unlock */
+				*addr = (FPW) 0x00300030;	/* erase sector */
+			}
+
+			while (((status =
+				 *addr) & (FPW) 0x00800080) !=
+			       (FPW) 0x00800080) {
+				if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					if (intel) {
+						*addr = (FPW) 0x00B000B0;	/* suspend erase     */
+						*addr = (FPW) 0x00FF00FF;	/* reset to read mode */
+					} else
+						*addr = (FPW) 0x00F000F0;	/* reset to read mode */
+
+					rcode = 1;
+					break;
+				}
+			}
+
+			if (intel) {
+				*addr = (FPW) 0x00500050;	/* clear status register cmd.   */
+				*addr = (FPW) 0x00FF00FF;	/* resest to read mode          */
+			} else
+				*addr = (FPW) 0x00F000F0;	/* reset to read mode */
+
+			printf (" done\n");
+		}
+	}
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:
+	    {
+		FPW data = 0;	/* 16 or 32 bit word, matches flash bus width */
+		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++;
+			}
+
+			res = write_word_amd (info, (FPWV *) addr,
+					      data);
+		}
+		return res;
+	    }		/* case FLASH_MAN_AMD */
+
+	case FLASH_MAN_INTEL:
+	    {
+		ulong cp, wp;
+		FPW data;
+		int count, i, l, rc, port_width;
+
+		/* get lower word aligned address */
+		wp = addr;
+		port_width = 1;
+
+		/*
+		 * 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 < port_width && cnt > 0; ++i) {
+				data = (data << 8) | *src++;
+				--cnt;
+				++cp;
+			}
+
+			for (; cnt == 0 && i < port_width; ++i, ++cp)
+				data = (data << 8) | (*(uchar *) cp);
+
+			if ((rc =
+			     write_data (info, wp, SWAP (data))) != 0)
+				return (rc);
+			wp += port_width;
+		}
+
+		if (cnt > WR_BLOCK) {
+			/*
+			 * handle word aligned part
+			 */
+			count = 0;
+			while (cnt >= WR_BLOCK) {
+
+				if ((rc =
+				     write_data_block (info,
+						       (ulong) src,
+						       wp)) != 0)
+					return (rc);
+
+				wp += WR_BLOCK;
+				src += WR_BLOCK;
+				cnt -= WR_BLOCK;
+
+				if (count++ > 0x800) {
+					spin_wheel ();
+					count = 0;
+				}
+			}
+		}
+
+		if (cnt < WR_BLOCK) {
+			/*
+			 * handle word aligned part
+			 */
+			count = 0;
+			while (cnt >= port_width) {
+				data = 0;
+				for (i = 0; i < port_width; ++i)
+					data = (data << 8) | *src++;
+
+				if ((rc =
+				     write_data (info, wp,
+						 SWAP (data))) != 0)
+					return (rc);
+
+				wp += port_width;
+				cnt -= port_width;
+				if (count++ > 0x800) {
+					spin_wheel ();
+					count = 0;
+				}
+			}
+		}
+
+		if (cnt == 0)
+			return (0);
+
+		/*
+		 * handle unaligned tail bytes
+		 */
+		data = 0;
+		for (i = 0, cp = wp; i < port_width && cnt > 0;
+		     ++i, ++cp) {
+			data = (data << 8) | *src++;
+			--cnt;
+		}
+
+		for (; i < port_width; ++i, ++cp)
+			data = (data << 8) | (*(uchar *) cp);
+
+		return (write_data (info, wp, SWAP (data)));
+	    }		/* case FLASH_MAN_INTEL */
+
+	}			/* switch */
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t * info, ulong dest, FPW data)
+{
+	FPWV *addr = (FPWV *) dest;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*addr & data) != data) {
+		printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	*addr = (FPW) 0x00400040;	/* write setup */
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	start = get_timer (0);
+
+	/* wait while polling the status register */
+	while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data_block (flash_info_t * info, ulong src, ulong dest)
+{
+	FPWV *srcaddr = (FPWV *) src;
+	FPWV *dstaddr = (FPWV *) dest;
+	ulong start;
+	int flag, i;
+
+	/* Check if Flash is (sufficiently) erased */
+	for (i = 0; i < WR_BLOCK; i++)
+		if ((*dstaddr++ & 0xff) != 0xff) {
+			printf ("not erased at %08lx (%lx)\n",
+				(ulong) dstaddr, *dstaddr);
+			return (2);
+		}
+
+	dstaddr = (FPWV *) dest;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	*dstaddr = (FPW) 0x00e800e8;	/* write block setup */
+
+	/* arm simple, non interrupt dependent timer */
+	start = get_timer (0);
+
+	/* wait while polling the status register */
+	while ((*dstaddr & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			*dstaddr = (FPW) 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*dstaddr = (FPW) 0x001f001f;	/* write 32 to buffer */
+	for (i = 0; i < WR_BLOCK; i++)
+		*dstaddr++ = *srcaddr++;
+
+	dstaddr -= 1;
+	*dstaddr = (FPW) 0x00d000d0;	/* write 32 to buffer */
+
+	/* arm simple, non interrupt dependent timer */
+	start = get_timer (0);
+
+	/* wait while polling the status register */
+	while ((*dstaddr & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			*dstaddr = (FPW) 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*dstaddr = (FPW) 0x00FF00FF;	/* restore read mode */
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * 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 *) (CFG_AMD_BASE);
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	base[FLASH_CYCLE1] = (FPW) 0x00AA00AA;	/* unlock */
+	base[FLASH_CYCLE2] = (FPW) 0x00550055;	/* unlock */
+	base[FLASH_CYCLE1] = (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 (start) > CFG_FLASH_WRITE_TOUT) {
+			*dest = (FPW) 0x00F000F0;	/* reset bank */
+			res = 1;
+		}
+	}
+
+	return (res);
+}
+
+void inline spin_wheel (void)
+{
+	static int p = 0;
+	static char w[] = "\\/-";
+
+	printf ("\010%c", w[p]);
+	(++p == 3) ? (p = 0) : 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Set/Clear sector's lock bit, returns:
+ * 0 - OK
+ * 1 - Error (timeout, voltage problems, etc.)
+ */
+int flash_real_protect (flash_info_t * info, long sector, int prot)
+{
+	ulong start;
+	int i;
+	int rc = 0;
+	FPWV *addr = (FPWV *) (info->start[sector]);
+	int flag = disable_interrupts ();
+
+	/*
+	 * 29F040B AMD flash does not support software protection/unprotection,
+	 * the only way to protect the AMD flash is marked it as prot bit.
+	 * This flash only support hardware protection, by supply or not supply
+	 * 12vpp to the flash
+	 */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
+		info->protect[sector] = prot;
+
+		return 0;
+	}
+
+	*addr = INTEL_CLEAR;	/* Clear status register    */
+	if (prot) {		/* Set sector lock bit      */
+		*addr = INTEL_LOCKBIT;	/* Sector lock bit          */
+		*addr = INTEL_PROTECT;	/* set                      */
+	} else {		/* Clear sector lock bit    */
+		*addr = INTEL_LOCKBIT;	/* All sectors lock bits    */
+		*addr = INTEL_CONFIRM;	/* clear                    */
+	}
+
+	start = get_timer (0);
+
+	while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+		if (get_timer (start) > CFG_FLASH_UNLOCK_TOUT) {
+			printf ("Flash lock bit operation timed out\n");
+			rc = 1;
+			break;
+		}
+	}
+
+	if (*addr != INTEL_OK) {
+		printf ("Flash lock bit operation failed at %08X, CSR=%08X\n",
+			(uint) addr, (uint) * addr);
+		rc = 1;
+	}
+
+	if (!rc)
+		info->protect[sector] = prot;
+
+	/*
+	 * Clear lock bit command clears all sectors lock bits, so
+	 * we have to restore lock bits of protected sectors.
+	 */
+	if (!prot) {
+		for (i = 0; i < info->sector_count; i++) {
+			if (info->protect[i]) {
+				start = get_timer (0);
+				addr = (FPWV *) (info->start[i]);
+				*addr = INTEL_LOCKBIT;	/* Sector lock bit  */
+				*addr = INTEL_PROTECT;	/* set              */
+				while ((*addr & INTEL_FINISHED) !=
+				       INTEL_FINISHED) {
+					if (get_timer (start) >
+					    CFG_FLASH_UNLOCK_TOUT) {
+						printf ("Flash lock bit operation timed out\n");
+						rc = 1;
+						break;
+					}
+				}
+			}
+		}
+	}
+
+	if (flag)
+		enable_interrupts ();
+
+	*addr = INTEL_RESET;	/* Reset to read array mode */
+
+	return rc;
+}