board/tqc/tqm5200/cam5200_flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2006
  * 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 <mpc5xxx.h>
 #include <asm/processor.h>

 #if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH)

 #if 0
 #define DEBUGF(x...) printf(x)
 #else
 #define DEBUGF(x...)
 #endif

 #define swap16(x) __swab16(x)

 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips */

 /*
  * CAM5200 is a TQM5200B based board. Additionally it also features
  * a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
  * Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
  * 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
  * access to flash chip slightly more complicated as additional byte
  * swapping is necessary within each 16 bit wide flash 'word'.
  *
  * This driver's task is to handle both flash devices: 32 bit TQM5200B
  * flash chip and 16 bit NIOS cpu flash chip. In the below
  * flash_addr_table table we use least significant address bit to mark
  * 16 bit flash bank and two sets of routines *_32 and *_16 to handle
  * specifics of both flashes.
  */
 static unsigned long flash_addr_table[][CFG_MAX_FLASH_BANKS] = {
 	{CFG_BOOTCS_START, CFG_CS5_START | 1}
 };

 /*-----------------------------------------------------------------------
  * Functions
  */
 static int write_word(flash_info_t * info, ulong dest, ulong data);
 #ifdef CFG_FLASH_2ND_16BIT_DEV
 static int write_word_32(flash_info_t * info, ulong dest, ulong data);
 static int write_word_16(flash_info_t * info, ulong dest, ulong data);
 static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
 static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
 #endif

 void flash_print_info(flash_info_t * info)
 {
 	int i, k;
 	int size, erased;
 	volatile unsigned long *flash;

 	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;
 		default:
 			printf("Unknown Vendor ");
 			break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 		case FLASH_S29GL128N:
 			printf ("S29GL128N (256 Mbit, uniform sector size)\n");
 			break;
 		case FLASH_AM320B:
 			printf ("29LV320B (32 Mbit, bottom boot sect)\n");
 			break;
 		case FLASH_AM320T:
 			printf ("29LV320T (32 Mbit, top boot sect)\n");
 			break;
 		default:
 			printf("Unknown Chip Type\n");
 			break;
 	}

 	printf("  Size: %ld KB in %d Sectors\n",
 			info->size >> 10, info->sector_count);

 	printf("  Sector Start Addresses:");
 	for (i = 0; i < info->sector_count; ++i) {
 		/*
 		 * Check if whole sector is erased
 		 */
 		if (i != (info->sector_count - 1))
 			size = info->start[i + 1] - info->start[i];
 		else
 			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;
 			}
 		}

 		if ((i % 5) == 0)
 			printf("\n   ");

 		printf(" %08lX%s%s", info->start[i],
 				erased ? " E" : "  ",
 				info->protect[i] ? "RO " : "   ");
 	}
 	printf("\n");
 	return;
 }


 /*
  * The following code cannot be run from FLASH!
  */
 #ifdef CFG_FLASH_2ND_16BIT_DEV
 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 {

 	DEBUGF("get_size: FLASH ADDR %08lx\n", addr);

 	/* bit 0 used for big flash marking */
 	if ((ulong)addr & 0x1)
 		return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
 	else
 		return flash_get_size_32(addr, info);
 }

 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
 #else
 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 #endif
 {
 	short i;
 	CFG_FLASH_WORD_SIZE value;
 	ulong base = (ulong) addr;
 	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;

 	DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);

 	/* Write auto select command: read Manufacturer ID */
 	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 	udelay(1000);

 	value = addr2[0];
 	DEBUGF("FLASH MANUFACT: %x\n", value);

 	switch (value) {
 		case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 			info->flash_id = FLASH_MAN_AMD;
 			break;
 		default:
 			info->flash_id = FLASH_UNKNOWN;
 			info->sector_count = 0;
 			info->size = 0;
 			return (0);	/* no or unknown flash  */
 	}

 	value = addr2[1];	/* device ID            */
 	DEBUGF("\nFLASH DEVICEID: %x\n", value);

 	switch (value) {
 		case AMD_ID_MIRROR:
 			DEBUGF("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 					addr[14], addr[15]);
 			switch(addr[14]) {
 				case AMD_ID_GL128N_2:
 					if (addr[15] != AMD_ID_GL128N_3) {
 						DEBUGF("Chip: S29GL128N -> unknown\n");
 						info->flash_id = FLASH_UNKNOWN;
 					} else {
 						DEBUGF("Chip: S29GL128N\n");
 						info->flash_id += FLASH_S29GL128N;
 						info->sector_count = 128;
 						info->size = 0x02000000;
 					}
 					break;
 				default:
 					info->flash_id = FLASH_UNKNOWN;
 					return(0);
 			}
 			break;

 		default:
 			info->flash_id = FLASH_UNKNOWN;
 			return (0);	/* => no or unknown flash */
 	}

 	/* set up sector start address table */
 	for (i = 0; i < info->sector_count; i++)
 		info->start[i] = base + (i * 0x00040000);

 	/* 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 */
 		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);

 		info->protect[i] = addr2[2] & 1;
 	}

 	/* issue bank reset to return to read mode */
 	addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;

 	return (info->size);
 }

 static int wait_for_DQ7_32(flash_info_t * info, int sect)
 {
 	ulong start, now, last;
 	volatile CFG_FLASH_WORD_SIZE *addr =
 		(CFG_FLASH_WORD_SIZE *) (info->start[sect]);

 	start = get_timer(0);
 	last = start;
 	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 			(CFG_FLASH_WORD_SIZE) 0x00800080) {
 		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;
 		}
 	}
 	return 0;
 }

 #ifdef CFG_FLASH_2ND_16BIT_DEV
 int flash_erase(flash_info_t * info, int s_first, int s_last)
 {
 	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 		return flash_erase_16(info, s_first, s_last);
 	} else {
 		return flash_erase_32(info, s_first, s_last);
 	}
 }

 static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
 #else
 int flash_erase(flash_info_t * info, int s_first, int s_last)
 #endif
 {
 	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 	volatile CFG_FLASH_WORD_SIZE *addr2;
 	int flag, prot, sect, l_sect;

 	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;
 	}

 	if (info->flash_id == FLASH_UNKNOWN) {
 		printf("Can't erase unknown flash type - aborted\n");
 		return 1;
 	}

 	prot = 0;
 	for (sect = s_first; sect <= s_last; ++sect) {
 		if (info->protect[sect])
 			prot++;
 	}

 	if (prot)
 		printf("- Warning: %d protected sectors will not be erased!", prot);

 	printf("\n");

 	l_sect = -1;

 	/* 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 */
 			addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);

 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 			addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;	/* sector erase */

 			l_sect = sect;
 			/*
 			 * Wait for each sector to complete, it's more
 			 * reliable.  According to AMD Spec, you must
 			 * issue all erase commands within a specified
 			 * timeout.  This has been seen to fail, especially
 			 * if printf()s are included (for debug)!!
 			 */
 			wait_for_DQ7_32(info, sect);
 		}
 	}

 	/* re-enable interrupts if necessary */
 	if (flag)
 		enable_interrupts();

 	/* wait at least 80us - let's wait 1 ms */
 	udelay(1000);

 	/* reset to read mode */
 	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 	addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;	/* reset bank */

 	printf(" done\n");
 	return 0;
 }

 /*-----------------------------------------------------------------------
  * Copy memory to flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 {
 	ulong cp, wp, data;
 	int i, l, rc;

 	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));
 }

 /*-----------------------------------------------------------------------
  * Copy memory to flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 #ifdef CFG_FLASH_2ND_16BIT_DEV
 static int write_word(flash_info_t * info, ulong dest, ulong data)
 {
 	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 		return write_word_16(info, dest, data);
 	} else {
 		return write_word_32(info, dest, data);
 	}
 }

 static int write_word_32(flash_info_t * info, ulong dest, ulong data)
 #else
 static int write_word(flash_info_t * info, ulong dest, ulong data)
 #endif
 {
 	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 	ulong start;
 	int i, flag;

 	/* Check if Flash is (sufficiently) erased */
 	if ((*((vu_long *)dest) & data) != data)
 		return (2);

 	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 		/* Disable interrupts which might cause a timeout here */
 		flag = disable_interrupts();

 		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 		addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;

 		dest2[i] = data2[i];

 		/* re-enable interrupts if necessary */
 		if (flag)
 			enable_interrupts();

 		/* data polling for D7 */
 		start = get_timer(0);
 		while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 				(data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {

 			if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 				return (1);
 		}
 	}

 	return (0);
 }

 #ifdef CFG_FLASH_2ND_16BIT_DEV

 #undef  CFG_FLASH_WORD_SIZE
 #define CFG_FLASH_WORD_SIZE unsigned short

 /*
  * The following code cannot be run from FLASH!
  */
 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
 {
 	short i;
 	CFG_FLASH_WORD_SIZE value;
 	ulong base = (ulong) addr;
 	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;

 	DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);

 	/* issue bank reset to return to read mode */
 	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;

 	/* Write auto select command: read Manufacturer ID */
 	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90009000;
 	udelay(1000);

 	value = swap16(addr2[0]);
 	DEBUGF("FLASH MANUFACT: %x\n", value);

 	switch (value) {
 		case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 			info->flash_id = FLASH_MAN_AMD;
 			break;
 		case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 			info->flash_id = FLASH_MAN_FUJ;
 			break;
 		default:
 			info->flash_id = FLASH_UNKNOWN;
 			info->sector_count = 0;
 			info->size = 0;
 			return (0);	/* no or unknown flash  */
 	}

 	value = swap16(addr2[1]);	/* device ID            */
 	DEBUGF("\nFLASH DEVICEID: %x\n", value);

 	switch (value) {
 		case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 			info->flash_id += FLASH_AM320B;
 			info->sector_count = 71;
 			info->size = 0x00400000;
 			break;	/* => 4 MB	*/
 		case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 			info->flash_id += FLASH_AM320T;
 			info->sector_count = 71;
 			info->size = 0x00400000;
 			break;	/* => 4 MB	*/
 		default:
 			info->flash_id = FLASH_UNKNOWN;
 			return (0);	/* => no or unknown flash */
 	}

 	if (info->flash_id & FLASH_BTYPE) {
 		/* set sector offsets for bottom boot block type        */
 		info->start[0] = base + 0x00000000;
 		info->start[1] = base + 0x00002000;
 		info->start[2] = base + 0x00004000;
 		info->start[3] = base + 0x00006000;
 		info->start[4] = base + 0x00008000;
 		info->start[5] = base + 0x0000a000;
 		info->start[6] = base + 0x0000c000;
 		info->start[7] = base + 0x0000e000;

 		for (i = 8; i < info->sector_count; i++)
 			info->start[i] = base + (i * 0x00010000) - 0x00070000;
 	} else {
 		/* set sector offsets for top boot block type           */
 		i = info->sector_count - 1;
 		info->start[i--] = base + info->size - 0x00002000;
 		info->start[i--] = base + info->size - 0x00004000;
 		info->start[i--] = base + info->size - 0x00006000;
 		info->start[i--] = base + info->size - 0x00008000;
 		info->start[i--] = base + info->size - 0x0000a000;
 		info->start[i--] = base + info->size - 0x0000c000;
 		info->start[i--] = base + info->size - 0x0000e000;

 		for (; i >= 0; i--)
 			info->start[i] = base + i * 0x00010000;
 	}

 	/* 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 */
 		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);

 		info->protect[i] = addr2[2] & 1;
 	}

 	/* issue bank reset to return to read mode */
 	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;

 	return (info->size);
 }

 static int wait_for_DQ7_16(flash_info_t * info, int sect)
 {
 	ulong start, now, last;
 	volatile CFG_FLASH_WORD_SIZE *addr =
 		(CFG_FLASH_WORD_SIZE *) (info->start[sect]);

 	start = get_timer(0);
 	last = start;
 	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
 			(CFG_FLASH_WORD_SIZE) 0x80008000) {
 		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;
 		}
 	}
 	return 0;
 }

 static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
 {
 	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 	volatile CFG_FLASH_WORD_SIZE *addr2;
 	int flag, prot, sect, l_sect;

 	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;
 	}

 	if (info->flash_id == FLASH_UNKNOWN) {
 		printf("Can't erase unknown flash type - aborted\n");
 		return 1;
 	}

 	prot = 0;
 	for (sect = s_first; sect <= s_last; ++sect) {
 		if (info->protect[sect])
 			prot++;
 	}

 	if (prot)
 		printf("- Warning: %d protected sectors will not be erased!",	prot);

 	printf("\n");

 	l_sect = -1;

 	/* 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 */
 			addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);

 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x80008000;
 			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 			addr2[0] = (CFG_FLASH_WORD_SIZE) 0x30003000;	/* sector erase */

 			l_sect = sect;
 			/*
 			 * Wait for each sector to complete, it's more
 			 * reliable.  According to AMD Spec, you must
 			 * issue all erase commands within a specified
 			 * timeout.  This has been seen to fail, especially
 			 * if printf()s are included (for debug)!!
 			 */
 			wait_for_DQ7_16(info, sect);
 		}
 	}

 	/* re-enable interrupts if necessary */
 	if (flag)
 		enable_interrupts();

 	/* wait at least 80us - let's wait 1 ms */
 	udelay(1000);

 	/* reset to read mode */
 	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 	addr[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;	/* reset bank */

 	printf(" done\n");
 	return 0;
 }

 static int write_word_16(flash_info_t * info, ulong dest, ulong data)
 {
 	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 	ulong start;
 	int i;

 	/* Check if Flash is (sufficiently) erased */
 	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 		if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
 			return (2);
 	}

 	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 		int flag;

 		/* Disable interrupts which might cause a timeout here */
 		flag = disable_interrupts();

 		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 		addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 		addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xA000A000;

 		dest2[i] = swap16(data2[i]);

 		/* re-enable interrupts if necessary */
 		if (flag)
 			enable_interrupts();

 		/* data polling for D7 */
 		start = get_timer(0);
 		while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
 				(swap16(data2[i]) & (CFG_FLASH_WORD_SIZE) 0x80008000)) {

 			if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 				return (1);
 			}
 		}
 	}

 	return (0);
 }
 #endif /* CFG_FLASH_2ND_16BIT_DEV */

 /*-----------------------------------------------------------------------
  * 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);

 /*-----------------------------------------------------------------------
  */

 unsigned long flash_init(void)
 {
 	unsigned long total_b = 0;
 	unsigned long size_b[CFG_MAX_FLASH_BANKS];
 	unsigned short index = 0;
 	int i;

 	DEBUGF("\n");
 	DEBUGF("FLASH: Index: %d\n", index);

 	/* Init: no FLASHes known */
 	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 		flash_info[i].flash_id = FLASH_UNKNOWN;
 		flash_info[i].sector_count = -1;
 		flash_info[i].size = 0;

 		/* check whether the address is 0 */
 		if (flash_addr_table[index][i] == 0)
 			continue;

 		/* call flash_get_size() to initialize sector address */
 		size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 				&flash_info[i]);

 		flash_info[i].size = size_b[i];

 		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 			printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 					i+1, size_b[i], size_b[i] << 20);
 			flash_info[i].sector_count = -1;
 			flash_info[i].size = 0;
 		}

 		/* Monitor protection ON by default */
 		(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
 				    CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
 				    &flash_info[i]);
 #if defined(CONFIG_ENV_IS_IN_FLASH)
 		(void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 				    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 				    &flash_info[i]);
 #if defined(CONFIG_ENV_ADDR_REDUND)
 		(void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 				    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 				    &flash_info[i]);
 #endif
 #endif
 		total_b += flash_info[i].size;
 	}

 	return total_b;
 }
 #endif /* if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH) */
	/*
	* (C) Copyright 2006
	* 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 <mpc5xxx.h>
	#include <asm/processor.h>

	#if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH)

	#if 0
	#define DEBUGF(x...) printf(x)
	#else
	#define DEBUGF(x...)
	#endif

	#define swap16(x) __swab16(x)

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */

	/*
	* CAM5200 is a TQM5200B based board. Additionally it also features
	* a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
	* Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
	* 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
	* access to flash chip slightly more complicated as additional byte
	* swapping is necessary within each 16 bit wide flash 'word'.
	*
	* This driver's task is to handle both flash devices: 32 bit TQM5200B
	* flash chip and 16 bit NIOS cpu flash chip. In the below
	* flash_addr_table table we use least significant address bit to mark
	* 16 bit flash bank and two sets of routines _32 and _16 to handle
	* specifics of both flashes.
	*/
	static unsigned long flash_addr_table[][CFG_MAX_FLASH_BANKS] = {
	{CFG_BOOTCS_START, CFG_CS5_START \| 1}
	};

	/*-----------------------------------------------------------------------
	* Functions
	*/
	static int write_word(flash_info_t * info, ulong dest, ulong data);
	#ifdef CFG_FLASH_2ND_16BIT_DEV
	static int write_word_32(flash_info_t * info, ulong dest, ulong data);
	static int write_word_16(flash_info_t * info, ulong dest, ulong data);
	static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
	static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
	static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
	static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
	#endif

	void flash_print_info(flash_info_t * info)
	{
	int i, k;
	int size, erased;
	volatile unsigned long *flash;

	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;
	default:
	printf("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_S29GL128N:
	printf ("S29GL128N (256 Mbit, uniform sector size)\n");
	break;
	case FLASH_AM320B:
	printf ("29LV320B (32 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM320T:
	printf ("29LV320T (32 Mbit, top boot sect)\n");
	break;
	default:
	printf("Unknown Chip Type\n");
	break;
	}

	printf(" Size: %ld KB in %d Sectors\n",
	info->size >> 10, info->sector_count);

	printf(" Sector Start Addresses:");
	for (i = 0; i < info->sector_count; ++i) {
	/*
	* Check if whole sector is erased
	*/
	if (i != (info->sector_count - 1))
	size = info->start[i + 1] - info->start[i];
	else
	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;
	}
	}

	if ((i % 5) == 0)
	printf("\n ");

	printf(" %08lX%s%s", info->start[i],
	erased ? " E" : " ",
	info->protect[i] ? "RO " : " ");
	}
	printf("\n");
	return;
	}


	/*
	* The following code cannot be run from FLASH!
	*/
	#ifdef CFG_FLASH_2ND_16BIT_DEV
	static ulong flash_get_size(vu_long * addr, flash_info_t * info)
	{

	DEBUGF("get_size: FLASH ADDR %08lx\n", addr);

	/* bit 0 used for big flash marking */
	if ((ulong)addr & 0x1)
	return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
	else
	return flash_get_size_32(addr, info);
	}

	static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
	#else
	static ulong flash_get_size(vu_long * addr, flash_info_t * info)
	#endif
	{
	short i;
	CFG_FLASH_WORD_SIZE value;
	ulong base = (ulong) addr;
	volatile CFG_FLASH_WORD_SIZE addr2 = (CFG_FLASH_WORD_SIZE ) addr;

	DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);

	/* Write auto select command: read Manufacturer ID */
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
	udelay(1000);

	value = addr2[0];
	DEBUGF("FLASH MANUFACT: %x\n", value);

	switch (value) {
	case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0); /* no or unknown flash */
	}

	value = addr2[1]; /* device ID */
	DEBUGF("\nFLASH DEVICEID: %x\n", value);

	switch (value) {
	case AMD_ID_MIRROR:
	DEBUGF("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
	addr[14], addr[15]);
	switch(addr[14]) {
	case AMD_ID_GL128N_2:
	if (addr[15] != AMD_ID_GL128N_3) {
	DEBUGF("Chip: S29GL128N -> unknown\n");
	info->flash_id = FLASH_UNKNOWN;
	} else {
	DEBUGF("Chip: S29GL128N\n");
	info->flash_id += FLASH_S29GL128N;
	info->sector_count = 128;
	info->size = 0x02000000;
	}
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	return(0);
	}
	break;

	default:
	info->flash_id = FLASH_UNKNOWN;
	return (0); /* => no or unknown flash */
	}

	/* set up sector start address table */
	for (i = 0; i < info->sector_count; i++)
	info->start[i] = base + (i * 0x00040000);

	/* 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 */
	addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);

	info->protect[i] = addr2[2] & 1;
	}

	/* issue bank reset to return to read mode */
	addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;

	return (info->size);
	}

	static int wait_for_DQ7_32(flash_info_t * info, int sect)
	{
	ulong start, now, last;
	volatile CFG_FLASH_WORD_SIZE *addr =
	(CFG_FLASH_WORD_SIZE *) (info->start[sect]);

	start = get_timer(0);
	last = start;
	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
	(CFG_FLASH_WORD_SIZE) 0x00800080) {
	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;
	}
	}
	return 0;
	}

	#ifdef CFG_FLASH_2ND_16BIT_DEV
	int flash_erase(flash_info_t * info, int s_first, int s_last)
	{
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
	return flash_erase_16(info, s_first, s_last);
	} else {
	return flash_erase_32(info, s_first, s_last);
	}
	}

	static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
	#else
	int flash_erase(flash_info_t * info, int s_first, int s_last)
	#endif
	{
	volatile CFG_FLASH_WORD_SIZE addr = (CFG_FLASH_WORD_SIZE ) (info->start[0]);
	volatile CFG_FLASH_WORD_SIZE *addr2;
	int flag, prot, sect, l_sect;

	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;
	}

	if (info->flash_id == FLASH_UNKNOWN) {
	printf("Can't erase unknown flash type - aborted\n");
	return 1;
	}

	prot = 0;
	for (sect = s_first; sect <= s_last; ++sect) {
	if (info->protect[sect])
	prot++;
	}

	if (prot)
	printf("- Warning: %d protected sectors will not be erased!", prot);

	printf("\n");

	l_sect = -1;

	/* 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 */
	addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);

	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
	addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
	addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
	addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030; /* sector erase */

	l_sect = sect;
	/*
	* Wait for each sector to complete, it's more
	* reliable. According to AMD Spec, you must
	* issue all erase commands within a specified
	* timeout. This has been seen to fail, especially
	* if printf()s are included (for debug)!!
	*/
	wait_for_DQ7_32(info, sect);
	}
	}

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay(1000);

	/* reset to read mode */
	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
	addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */

	printf(" done\n");
	return 0;
	}

	/*-----------------------------------------------------------------------
	* Copy memory to flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	{
	ulong cp, wp, data;
	int i, l, rc;

	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));
	}

	/*-----------------------------------------------------------------------
	* Copy memory to flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	#ifdef CFG_FLASH_2ND_16BIT_DEV
	static int write_word(flash_info_t * info, ulong dest, ulong data)
	{
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
	return write_word_16(info, dest, data);
	} else {
	return write_word_32(info, dest, data);
	}
	}

	static int write_word_32(flash_info_t * info, ulong dest, ulong data)
	#else
	static int write_word(flash_info_t * info, ulong dest, ulong data)
	#endif
	{
	volatile CFG_FLASH_WORD_SIZE addr2 = (CFG_FLASH_WORD_SIZE ) (info->start[0]);
	volatile CFG_FLASH_WORD_SIZE dest2 = (CFG_FLASH_WORD_SIZE ) dest;
	volatile CFG_FLASH_WORD_SIZE data2 = (CFG_FLASH_WORD_SIZE ) & data;
	ulong start;
	int i, flag;

	/* Check if Flash is (sufficiently) erased */
	if ((((vu_long )dest) & data) != data)
	return (2);

	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;

	dest2[i] = data2[i];

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* data polling for D7 */
	start = get_timer(0);
	while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
	(data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {

	if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
	return (1);
	}
	}

	return (0);
	}

	#ifdef CFG_FLASH_2ND_16BIT_DEV

	#undef CFG_FLASH_WORD_SIZE
	#define CFG_FLASH_WORD_SIZE unsigned short

	/*
	* The following code cannot be run from FLASH!
	*/
	static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
	{
	short i;
	CFG_FLASH_WORD_SIZE value;
	ulong base = (ulong) addr;
	volatile CFG_FLASH_WORD_SIZE addr2 = (CFG_FLASH_WORD_SIZE ) addr;

	DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);

	/* issue bank reset to return to read mode */
	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;

	/* Write auto select command: read Manufacturer ID */
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90009000;
	udelay(1000);

	value = swap16(addr2[0]);
	DEBUGF("FLASH MANUFACT: %x\n", value);

	switch (value) {
	case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	break;
	case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
	info->flash_id = FLASH_MAN_FUJ;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0); /* no or unknown flash */
	}

	value = swap16(addr2[1]); /* device ID */
	DEBUGF("\nFLASH DEVICEID: %x\n", value);

	switch (value) {
	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
	info->flash_id += FLASH_AM320B;
	info->sector_count = 71;
	info->size = 0x00400000;
	break; /* => 4 MB */
	case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
	info->flash_id += FLASH_AM320T;
	info->sector_count = 71;
	info->size = 0x00400000;
	break; /* => 4 MB */
	default:
	info->flash_id = FLASH_UNKNOWN;
	return (0); /* => no or unknown flash */
	}

	if (info->flash_id & FLASH_BTYPE) {
	/* set sector offsets for bottom boot block type */
	info->start[0] = base + 0x00000000;
	info->start[1] = base + 0x00002000;
	info->start[2] = base + 0x00004000;
	info->start[3] = base + 0x00006000;
	info->start[4] = base + 0x00008000;
	info->start[5] = base + 0x0000a000;
	info->start[6] = base + 0x0000c000;
	info->start[7] = base + 0x0000e000;

	for (i = 8; i < info->sector_count; i++)
	info->start[i] = base + (i * 0x00010000) - 0x00070000;
	} else {
	/* set sector offsets for top boot block type */
	i = info->sector_count - 1;
	info->start[i--] = base + info->size - 0x00002000;
	info->start[i--] = base + info->size - 0x00004000;
	info->start[i--] = base + info->size - 0x00006000;
	info->start[i--] = base + info->size - 0x00008000;
	info->start[i--] = base + info->size - 0x0000a000;
	info->start[i--] = base + info->size - 0x0000c000;
	info->start[i--] = base + info->size - 0x0000e000;

	for (; i >= 0; i--)
	info->start[i] = base + i * 0x00010000;
	}

	/* 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 */
	addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);

	info->protect[i] = addr2[2] & 1;
	}

	/* issue bank reset to return to read mode */
	addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;

	return (info->size);
	}

	static int wait_for_DQ7_16(flash_info_t * info, int sect)
	{
	ulong start, now, last;
	volatile CFG_FLASH_WORD_SIZE *addr =
	(CFG_FLASH_WORD_SIZE *) (info->start[sect]);

	start = get_timer(0);
	last = start;
	while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
	(CFG_FLASH_WORD_SIZE) 0x80008000) {
	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;
	}
	}
	return 0;
	}

	static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
	{
	volatile CFG_FLASH_WORD_SIZE addr = (CFG_FLASH_WORD_SIZE ) (info->start[0]);
	volatile CFG_FLASH_WORD_SIZE *addr2;
	int flag, prot, sect, l_sect;

	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;
	}

	if (info->flash_id == FLASH_UNKNOWN) {
	printf("Can't erase unknown flash type - aborted\n");
	return 1;
	}

	prot = 0;
	for (sect = s_first; sect <= s_last; ++sect) {
	if (info->protect[sect])
	prot++;
	}

	if (prot)
	printf("- Warning: %d protected sectors will not be erased!", prot);

	printf("\n");

	l_sect = -1;

	/* 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 */
	addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);

	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
	addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x80008000;
	addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
	addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
	addr2[0] = (CFG_FLASH_WORD_SIZE) 0x30003000; /* sector erase */

	l_sect = sect;
	/*
	* Wait for each sector to complete, it's more
	* reliable. According to AMD Spec, you must
	* issue all erase commands within a specified
	* timeout. This has been seen to fail, especially
	* if printf()s are included (for debug)!!
	*/
	wait_for_DQ7_16(info, sect);
	}
	}

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay(1000);

	/* reset to read mode */
	addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
	addr[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000; /* reset bank */

	printf(" done\n");
	return 0;
	}

	static int write_word_16(flash_info_t * info, ulong dest, ulong data)
	{
	volatile CFG_FLASH_WORD_SIZE addr2 = (CFG_FLASH_WORD_SIZE ) (info->start[0]);
	volatile CFG_FLASH_WORD_SIZE dest2 = (CFG_FLASH_WORD_SIZE ) dest;
	volatile CFG_FLASH_WORD_SIZE data2 = (CFG_FLASH_WORD_SIZE ) & data;
	ulong start;
	int i;

	/* Check if Flash is (sufficiently) erased */
	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
	if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
	return (2);
	}

	for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
	int flag;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
	addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
	addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xA000A000;

	dest2[i] = swap16(data2[i]);

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* data polling for D7 */
	start = get_timer(0);
	while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
	(swap16(data2[i]) & (CFG_FLASH_WORD_SIZE) 0x80008000)) {

	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	}

	return (0);
	}
	#endif /* CFG_FLASH_2ND_16BIT_DEV */

	/*-----------------------------------------------------------------------
	* 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);

	/*-----------------------------------------------------------------------
	*/

	unsigned long flash_init(void)
	{
	unsigned long total_b = 0;
	unsigned long size_b[CFG_MAX_FLASH_BANKS];
	unsigned short index = 0;
	int i;

	DEBUGF("\n");
	DEBUGF("FLASH: Index: %d\n", index);

	/* Init: no FLASHes known */
	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	flash_info[i].sector_count = -1;
	flash_info[i].size = 0;

	/* check whether the address is 0 */
	if (flash_addr_table[index][i] == 0)
	continue;

	/* call flash_get_size() to initialize sector address */
	size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
	&flash_info[i]);

	flash_info[i].size = size_b[i];

	if (flash_info[i].flash_id == FLASH_UNKNOWN) {
	printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
	i+1, size_b[i], size_b[i] << 20);
	flash_info[i].sector_count = -1;
	flash_info[i].size = 0;
	}

	/* Monitor protection ON by default */
	(void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
	CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
	&flash_info[i]);
	#if defined(CONFIG_ENV_IS_IN_FLASH)
	(void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
	CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
	&flash_info[i]);
	#if defined(CONFIG_ENV_ADDR_REDUND)
	(void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
	CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
	&flash_info[i]);
	#endif
	#endif
	total_b += flash_info[i].size;
	}

	return total_b;
	}
	#endif /* if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH) */