[people/ms/u-boot.git] / board / pcs440ep / flash.c

/*
 * (C) Copyright 2006
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/processor.h>

#ifndef CONFIG_SYS_FLASH_READ0
#define CONFIG_SYS_FLASH_READ0		0x0000	/* 0 is standard			*/
#define CONFIG_SYS_FLASH_READ1		0x0001	/* 1 is standard			*/
#define CONFIG_SYS_FLASH_READ2		0x0002	/* 2 is standard			*/
#endif

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

/*
 * Functions
 */
static int write_word(flash_info_t *info, ulong dest, ulong data);
static ulong flash_get_size(vu_long *addr, flash_info_t *info);

unsigned long flash_init(void)
{
	unsigned long size_b0, size_b1;
	int i;
	unsigned long base_b0, base_b1;

	/* Init: no FLASHes known */
	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */

	base_b0 = FLASH_BASE0_PRELIM;
	size_b0 = flash_get_size ((vu_long *) base_b0, &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);
	}

	base_b1 = FLASH_BASE1_PRELIM;
	size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);

	return (size_b0 + size_b1);
}

void flash_print_info(flash_info_t *info)
{
	int i;
	int k;
	int size;
	int 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;
	case FLASH_MAN_SST:	printf ("SST ");		break;
	case FLASH_MAN_STM:	printf ("ST Micro");		break;
	case FLASH_MAN_EXCEL:	printf ("Excel Semiconductor "); break;
	case FLASH_MAN_MX:	printf ("MXIC "); 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_AM040:	printf ("AM29LV040B (4 Mbit, uniform sector size)\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_AM320T:	printf ("AM29LV320T (32 M, top sector)\n");
		break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 M, bottom sector)\n");
		break;
	case FLASH_AMDL322T:	printf ("AM29DL322T (32 M, top sector)\n");
		break;
	case FLASH_AMDL322B:	printf ("AM29DL322B (32 M, bottom sector)\n");
		break;
	case FLASH_AMDL323T:	printf ("AM29DL323T (32 M, top sector)\n");
		break;
	case FLASH_AMDL323B:	printf ("AM29DL323B (32 M, bottom sector)\n");
		break;
	case FLASH_SST020:	printf ("SST39LF/VF020 (2 Mbit, uniform sector size)\n");
		break;
	case FLASH_SST040:	printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
		break;
	case STM_ID_M29W040B:	printf ("ST Micro M29W040B (4 Mbit, uniform sector size)\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) {
#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
		/*
		 * 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   ");
		/* print empty and read-only info */
		printf (" %08lX%s%s",
			info->start[i],
			erased ? " E" : "  ",
			info->protect[i] ? "RO " : "   ");
#else
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			info->protect[i] ? " (RO)" : "     ");
#endif

	}
	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;
	short n;
	volatile CONFIG_SYS_FLASH_WORD_SIZE value;
	ulong base = (ulong)addr;
	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)addr;

	/* Write auto select command: read Manufacturer ID */
	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;

	value = addr2[CONFIG_SYS_FLASH_READ0];

	switch (value) {
	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
		info->flash_id = FLASH_MAN_SST;
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
		info->flash_id = FLASH_MAN_STM;
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
		info->flash_id = FLASH_MAN_EXCEL;
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)MX_MANUFACT:
		info->flash_id = FLASH_MAN_MX;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

	value = addr2[CONFIG_SYS_FLASH_READ1];		/* device ID	*/

	switch (value) {
	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;				/* => 0.5 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;				/* => 0.5 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000;		/* => 0.5 MB	*/
		break;
	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_ID_M29W040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000; /* => 0,5 MB */
		break;

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;				/* => 2 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;				/* => 2 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
		info->flash_id += FLASH_AM320T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
		info->flash_id += FLASH_AM320B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
		info->flash_id += FLASH_AMDL322T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
		info->flash_id += FLASH_AMDL322B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
		info->flash_id += FLASH_AMDL323T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
		info->flash_id += FLASH_AMDL323B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF020:
		info->flash_id += FLASH_SST020;
		info->sector_count = 64;
		info->size = 0x00040000;
		break;				/* => 256 kB	*/

	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF040:
		info->flash_id += FLASH_SST040;
		info->sector_count = 128;
		info->size = 0x00080000;
		break;				/* => 512 kB	*/

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

	}

	/* set up sector start address table */
	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
	    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00001000);
	} else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00010000);
	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
		/* set sector offsets for bottom boot block type	*/
		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
			info->start[i] = base;
			base += 8 << 10;
		}
		while (i < info->sector_count) {	/* 64k regular sectors	*/
			info->start[i] = base;
			base += 64 << 10;
			++i;
		}
	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
		/* set sector offsets for top boot block type		*/
		base += info->size;
		i = info->sector_count;
		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/
			base -= 8 << 10;
			--i;
			info->start[i] = base;
		}
		while (i > 0) {			/* 64k regular sectors	*/
			base -= 64 << 10;
			--i;
			info->start[i] = base;
		}
	} else {
		if (info->flash_id & FLASH_BTYPE) {
			/* set sector offsets for bottom boot block type	*/
			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 {
			/* set sector offsets for top boot block type		*/
			i = info->sector_count - 1;
			info->start[i--] = base + info->size - 0x00004000;
			info->start[i--] = base + info->size - 0x00006000;
			info->start[i--] = base + info->size - 0x00008000;
			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 CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
		if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
			info->protect[i] = 0;
		else
			info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
		*addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
	}

	return (info->size);
}


int flash_erase(flash_info_t *info, int s_first, int s_last)
{
	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
	int flag, prot, sect, l_sect;
	ulong start, now, last;

	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!\n", prot);
	else
		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 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
			if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
				addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
				addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
				addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
				addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
				addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
				addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */

				/* re-enable interrupts if necessary */
				if (flag) {
					enable_interrupts();
					flag = 0;
				}

				/* data polling for D7 */
				start = get_timer (0);
				while ((addr2[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
				       (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
					if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
						return (1);
				}
			} else {
				if (sect == s_first) {
					addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
					addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
					addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
					addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
					addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
				}
				addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
			}
			l_sect = sect;
		}
	}

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

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

	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;

	start = get_timer (0);
	last  = start;
	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
	while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc ('.');
			last = now;
		}
	}

DONE:
	/* reset to read mode */
	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
	addr[0] = (CONFIG_SYS_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));
}

/*
 * 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)
{
	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
	volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
	volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)&data;
	ulong start;
	int flag;
	int i;

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

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

	for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
		addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
		addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
		addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_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] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
		       (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
				return (1);
		}
	}

	return (0);
}
Commit	Line	Data
a4c8d138 SR	1	/*
	2	* (C) Copyright 2006
	3	* Stefan Roese, DENX Software Engineering, sr@denx.de.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
a4c8d138 SR	6	*/
	7
	8	#include <common.h>
	9	#include <asm/processor.h>
	10
6d0f6bcf JCPV	11	#ifndef CONFIG_SYS_FLASH_READ0
	12	#define CONFIG_SYS_FLASH_READ0 0x0000 /* 0 is standard */
	13	#define CONFIG_SYS_FLASH_READ1 0x0001 /* 1 is standard */
	14	#define CONFIG_SYS_FLASH_READ2 0x0002 /* 2 is standard */
a4c8d138 SR	15	#endif
a4c8d138 SR	16
6d0f6bcf	17	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
a4c8d138 SR	18
	19	/*
	20	* Functions
	21	*/
	22	static int write_word(flash_info_t *info, ulong dest, ulong data);
	23	static ulong flash_get_size(vu_long addr, flash_info_t info);
	24
	25	unsigned long flash_init(void)
	26	{
	27	unsigned long size_b0, size_b1;
	28	int i;
	29	unsigned long base_b0, base_b1;
	30
	31	/* Init: no FLASHes known */
6d0f6bcf	32	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
a4c8d138 SR	33	flash_info[i].flash_id = FLASH_UNKNOWN;
	34	}
	35
	36	/* Static FLASH Bank configuration here - FIXME XXX */
	37
	38	base_b0 = FLASH_BASE0_PRELIM;
	39	size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
	40
	41	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	42	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	43	size_b0, size_b0 << 20);
	44	}
	45
	46	base_b1 = FLASH_BASE1_PRELIM;
	47	size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
	48
	49	return (size_b0 + size_b1);
	50	}
	51
	52	void flash_print_info(flash_info_t *info)
	53	{
	54	int i;
	55	int k;
	56	int size;
	57	int erased;
	58	volatile unsigned long *flash;
	59
	60	if (info->flash_id == FLASH_UNKNOWN) {
	61	printf ("missing or unknown FLASH type\n");
	62	return;
	63	}
	64
	65	switch (info->flash_id & FLASH_VENDMASK) {
	66	case FLASH_MAN_AMD: printf ("AMD "); break;
	67	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	68	case FLASH_MAN_SST: printf ("SST "); break;
96e1d75b	69	case FLASH_MAN_STM: printf ("ST Micro"); break;
a4c8d138	70	case FLASH_MAN_EXCEL: printf ("Excel Semiconductor "); break;
566a494f	71	case FLASH_MAN_MX: printf ("MXIC "); break;
a4c8d138 SR	72	default: printf ("Unknown Vendor "); break;
	73	}
	74
	75	switch (info->flash_id & FLASH_TYPEMASK) {
	76	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	77	break;
	78	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	79	break;
	80	case FLASH_AM040: printf ("AM29LV040B (4 Mbit, uniform sector size)\n");
	81	break;
	82	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	83	break;
	84	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	85	break;
	86	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	87	break;
	88	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	89	break;
	90	case FLASH_AM320T: printf ("AM29LV320T (32 M, top sector)\n");
	91	break;
	92	case FLASH_AM320B: printf ("AM29LV320B (32 M, bottom sector)\n");
	93	break;
	94	case FLASH_AMDL322T: printf ("AM29DL322T (32 M, top sector)\n");
	95	break;
	96	case FLASH_AMDL322B: printf ("AM29DL322B (32 M, bottom sector)\n");
	97	break;
	98	case FLASH_AMDL323T: printf ("AM29DL323T (32 M, top sector)\n");
	99	break;
	100	case FLASH_AMDL323B: printf ("AM29DL323B (32 M, bottom sector)\n");
	101	break;
	102	case FLASH_SST020: printf ("SST39LF/VF020 (2 Mbit, uniform sector size)\n");
	103	break;
	104	case FLASH_SST040: printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
	105	break;
96e1d75b HS	106	case STM_ID_M29W040B: printf ("ST Micro M29W040B (4 Mbit, uniform sector size)\n");
96e1d75b HS	107	break;
a4c8d138 SR	108	default: printf ("Unknown Chip Type\n");
	109	break;
	110	}
	111
	112	printf (" Size: %ld MB in %d Sectors\n",
	113	info->size >> 20, info->sector_count);
	114
	115	printf (" Sector Start Addresses:");
	116	for (i=0; i<info->sector_count; ++i) {
6d0f6bcf	117	#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
a4c8d138 SR	118	/*
	119	* Check if whole sector is erased
	120	*/
	121	if (i != (info->sector_count-1))
	122	size = info->start[i+1] - info->start[i];
	123	else
	124	size = info->start[0] + info->size - info->start[i];
	125	erased = 1;
	126	flash = (volatile unsigned long *)info->start[i];
2fd9eb50	127	size = size >> 2; /* divide by 4 for longword access */
a4c8d138 SR	128	for (k=0; k<size; k++) {
	129	if (*flash++ != 0xffffffff) {
	130	erased = 0;
	131	break;
	132	}
	133	}
	134
	135	if ((i % 5) == 0)
	136	printf ("\n ");
	137	/* print empty and read-only info */
	138	printf (" %08lX%s%s",
	139	info->start[i],
	140	erased ? " E" : " ",
	141	info->protect[i] ? "RO " : " ");
	142	#else
	143	if ((i % 5) == 0)
	144	printf ("\n ");
	145	printf (" %08lX%s",
	146	info->start[i],
	147	info->protect[i] ? " (RO)" : " ");
	148	#endif
	149
	150	}
	151	printf ("\n");
	152	return;
	153	}
	154
	155	/*
	156	* The following code cannot be run from FLASH!
	157	*/
	158	static ulong flash_get_size(vu_long addr, flash_info_t info)
	159	{
	160	short i;
	161	short n;
6d0f6bcf	162	volatile CONFIG_SYS_FLASH_WORD_SIZE value;
a4c8d138	163	ulong base = (ulong)addr;
6d0f6bcf	164	volatile CONFIG_SYS_FLASH_WORD_SIZE addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE )addr;
a4c8d138 SR	165
a4c8d138 SR	166	/* Write auto select command: read Manufacturer ID */
6d0f6bcf JCPV	167	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	168	addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	169	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
a4c8d138	170
6d0f6bcf	171	value = addr2[CONFIG_SYS_FLASH_READ0];
a4c8d138 SR	172
a4c8d138 SR	173	switch (value) {
6d0f6bcf	174	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
a4c8d138 SR	175	info->flash_id = FLASH_MAN_AMD;
a4c8d138 SR	176	break;
6d0f6bcf	177	case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
a4c8d138 SR	178	info->flash_id = FLASH_MAN_FUJ;
a4c8d138 SR	179	break;
6d0f6bcf	180	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
a4c8d138 SR	181	info->flash_id = FLASH_MAN_SST;
a4c8d138 SR	182	break;
6d0f6bcf	183	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
96e1d75b HS	184	info->flash_id = FLASH_MAN_STM;
96e1d75b HS	185	break;
6d0f6bcf	186	case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
a4c8d138 SR	187	info->flash_id = FLASH_MAN_EXCEL;
a4c8d138 SR	188	break;
6d0f6bcf	189	case (CONFIG_SYS_FLASH_WORD_SIZE)MX_MANUFACT:
566a494f HS	190	info->flash_id = FLASH_MAN_MX;
566a494f HS	191	break;
a4c8d138 SR	192	default:
	193	info->flash_id = FLASH_UNKNOWN;
	194	info->sector_count = 0;
	195	info->size = 0;
	196	return (0); /* no or unknown flash */
	197	}
	198
6d0f6bcf	199	value = addr2[CONFIG_SYS_FLASH_READ1]; /* device ID */
a4c8d138 SR	200
a4c8d138 SR	201	switch (value) {
6d0f6bcf	202	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
a4c8d138 SR	203	info->flash_id += FLASH_AM400T;
	204	info->sector_count = 11;
	205	info->size = 0x00080000;
2fd9eb50	206	break; /* => 0.5 MB */
a4c8d138	207
6d0f6bcf	208	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
a4c8d138 SR	209	info->flash_id += FLASH_AM400B;
	210	info->sector_count = 11;
	211	info->size = 0x00080000;
2fd9eb50	212	break; /* => 0.5 MB */
a4c8d138	213
6d0f6bcf	214	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV040B:
2fd9eb50 WD	215	info->flash_id += FLASH_AM040;
	216	info->sector_count = 8;
	217	info->size = 0x0080000; /* => 0.5 MB */
	218	break;
6d0f6bcf	219	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_ID_M29W040B:
96e1d75b HS	220	info->flash_id += FLASH_AM040;
	221	info->sector_count = 8;
	222	info->size = 0x0080000; /* => 0,5 MB */
	223	break;
a4c8d138	224
6d0f6bcf	225	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
a4c8d138 SR	226	info->flash_id += FLASH_AM800T;
	227	info->sector_count = 19;
	228	info->size = 0x00100000;
2fd9eb50	229	break; /* => 1 MB */
a4c8d138	230
6d0f6bcf	231	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
a4c8d138 SR	232	info->flash_id += FLASH_AM800B;
	233	info->sector_count = 19;
	234	info->size = 0x00100000;
2fd9eb50	235	break; /* => 1 MB */
a4c8d138	236
6d0f6bcf	237	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
a4c8d138 SR	238	info->flash_id += FLASH_AM160T;
	239	info->sector_count = 35;
	240	info->size = 0x00200000;
2fd9eb50	241	break; /* => 2 MB */
a4c8d138	242
6d0f6bcf	243	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
a4c8d138 SR	244	info->flash_id += FLASH_AM160B;
	245	info->sector_count = 35;
	246	info->size = 0x00200000;
2fd9eb50	247	break; /* => 2 MB */
a4c8d138	248
6d0f6bcf	249	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
a4c8d138 SR	250	info->flash_id += FLASH_AM320T;
a4c8d138 SR	251	info->sector_count = 71;
2fd9eb50 WD	252	info->size = 0x00400000;
2fd9eb50 WD	253	break; /* => 4 MB */
a4c8d138	254
6d0f6bcf	255	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
a4c8d138 SR	256	info->flash_id += FLASH_AM320B;
a4c8d138 SR	257	info->sector_count = 71;
2fd9eb50 WD	258	info->size = 0x00400000;
2fd9eb50 WD	259	break; /* => 4 MB */
a4c8d138	260
6d0f6bcf	261	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
a4c8d138 SR	262	info->flash_id += FLASH_AMDL322T;
a4c8d138 SR	263	info->sector_count = 71;
2fd9eb50 WD	264	info->size = 0x00400000;
2fd9eb50 WD	265	break; /* => 4 MB */
a4c8d138	266
6d0f6bcf	267	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
a4c8d138 SR	268	info->flash_id += FLASH_AMDL322B;
a4c8d138 SR	269	info->sector_count = 71;
2fd9eb50 WD	270	info->size = 0x00400000;
2fd9eb50 WD	271	break; /* => 4 MB */
a4c8d138	272
6d0f6bcf	273	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
a4c8d138 SR	274	info->flash_id += FLASH_AMDL323T;
a4c8d138 SR	275	info->sector_count = 71;
2fd9eb50 WD	276	info->size = 0x00400000;
2fd9eb50 WD	277	break; /* => 4 MB */
a4c8d138	278
6d0f6bcf	279	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
a4c8d138 SR	280	info->flash_id += FLASH_AMDL323B;
a4c8d138 SR	281	info->sector_count = 71;
2fd9eb50 WD	282	info->size = 0x00400000;
2fd9eb50 WD	283	break; /* => 4 MB */
a4c8d138	284
6d0f6bcf	285	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF020:
a4c8d138 SR	286	info->flash_id += FLASH_SST020;
	287	info->sector_count = 64;
	288	info->size = 0x00040000;
2fd9eb50	289	break; /* => 256 kB */
a4c8d138	290
6d0f6bcf	291	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF040:
a4c8d138 SR	292	info->flash_id += FLASH_SST040;
	293	info->sector_count = 128;
	294	info->size = 0x00080000;
2fd9eb50	295	break; /* => 512 kB */
a4c8d138 SR	296
	297	default:
	298	info->flash_id = FLASH_UNKNOWN;
	299	return (0); /* => no or unknown flash */
	300
	301	}
	302
	303	/* set up sector start address table */
	304	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) \|\|
	305	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
	306	for (i = 0; i < info->sector_count; i++)
	307	info->start[i] = base + (i * 0x00001000);
	308	} else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
	309	for (i = 0; i < info->sector_count; i++)
	310	info->start[i] = base + (i * 0x00010000);
	311	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) \|\|
	312	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) \|\|
	313	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) \|\|
	314	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
	315	/* set sector offsets for bottom boot block type */
	316	for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
	317	info->start[i] = base;
	318	base += 8 << 10;
	319	}
	320	while (i < info->sector_count) { /* 64k regular sectors */
	321	info->start[i] = base;
	322	base += 64 << 10;
	323	++i;
	324	}
	325	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) \|\|
	326	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) \|\|
	327	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) \|\|
	328	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
	329	/* set sector offsets for top boot block type */
	330	base += info->size;
	331	i = info->sector_count;
	332	for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
	333	base -= 8 << 10;
	334	--i;
	335	info->start[i] = base;
	336	}
	337	while (i > 0) { /* 64k regular sectors */
	338	base -= 64 << 10;
	339	--i;
	340	info->start[i] = base;
	341	}
	342	} else {
	343	if (info->flash_id & FLASH_BTYPE) {
	344	/* set sector offsets for bottom boot block type */
	345	info->start[0] = base + 0x00000000;
	346	info->start[1] = base + 0x00004000;
	347	info->start[2] = base + 0x00006000;
	348	info->start[3] = base + 0x00008000;
	349	for (i = 4; i < info->sector_count; i++) {
	350	info->start[i] = base + (i * 0x00010000) - 0x00030000;
	351	}
	352	} else {
	353	/* set sector offsets for top boot block type */
	354	i = info->sector_count - 1;
	355	info->start[i--] = base + info->size - 0x00004000;
	356	info->start[i--] = base + info->size - 0x00006000;
	357	info->start[i--] = base + info->size - 0x00008000;
	358	for (; i >= 0; i--) {
	359	info->start[i] = base + i * 0x00010000;
360	}
361	}
362	}
363
364	/* check for protected sectors */
365	for (i = 0; i < info->sector_count; i++) {
366	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
367	/* D0 = 1 if protected */
6d0f6bcf	368	addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
a4c8d138 SR	369	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
	370	info->protect[i] = 0;
	371	else
6d0f6bcf	372	info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
a4c8d138 SR	373	}
	374
	375	/*
	376	* Prevent writes to uninitialized FLASH.
	377	*/
	378	if (info->flash_id != FLASH_UNKNOWN) {
6d0f6bcf JCPV	379	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
6d0f6bcf JCPV	380	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; / reset bank */
a4c8d138 SR	381	}
	382
	383	return (info->size);
	384	}
	385
	386
	387	int flash_erase(flash_info_t *info, int s_first, int s_last)
	388	{
6d0f6bcf JCPV	389	volatile CONFIG_SYS_FLASH_WORD_SIZE addr = (CONFIG_SYS_FLASH_WORD_SIZE )(info->start[0]);
6d0f6bcf JCPV	390	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
a4c8d138 SR	391	int flag, prot, sect, l_sect;
	392	ulong start, now, last;
	393
	394	if ((s_first < 0) \|\| (s_first > s_last)) {
	395	if (info->flash_id == FLASH_UNKNOWN)
	396	printf ("- missing\n");
	397	else
	398	printf ("- no sectors to erase\n");
	399	return 1;
	400	}
	401
	402	if (info->flash_id == FLASH_UNKNOWN) {
	403	printf ("Can't erase unknown flash type - aborted\n");
	404	return 1;
	405	}
	406
	407	prot = 0;
	408	for (sect=s_first; sect<=s_last; ++sect)
	409	if (info->protect[sect])
	410	prot++;
	411
	412	if (prot)
	413	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	414	else
	415	printf ("\n");
	416
	417	l_sect = -1;
	418
	419	/* Disable interrupts which might cause a timeout here */
	420	flag = disable_interrupts();
	421
	422	/* Start erase on unprotected sectors */
	423	for (sect = s_first; sect<=s_last; sect++) {
	424	if (info->protect[sect] == 0) { /* not protected */
6d0f6bcf	425	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
a4c8d138	426	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
6d0f6bcf JCPV	427	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	428	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	429	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
	430	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	431	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	432	addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030; /* sector erase */
a4c8d138 SR	433
	434	/* re-enable interrupts if necessary */
	435	if (flag) {
	436	enable_interrupts();
	437	flag = 0;
	438	}
	439
	440	/* data polling for D7 */
	441	start = get_timer (0);
6d0f6bcf JCPV	442	while ((addr2[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
	443	(CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
	444	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
a4c8d138 SR	445	return (1);
	446	}
	447	} else {
	448	if (sect == s_first) {
6d0f6bcf JCPV	449	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	450	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	451	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
	452	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	453	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
a4c8d138	454	}
6d0f6bcf	455	addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030; /* sector erase */
a4c8d138 SR	456	}
	457	l_sect = sect;
	458	}
	459	}
	460
	461	/* re-enable interrupts if necessary */
	462	if (flag)
	463	enable_interrupts();
	464
	465	/* wait at least 80us - let's wait 1 ms */
	466	udelay (1000);
	467
	468	/*
	469	* We wait for the last triggered sector
	470	*/
	471	if (l_sect < 0)
	472	goto DONE;
	473
	474	start = get_timer (0);
	475	last = start;
6d0f6bcf JCPV	476	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
	477	while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
	478	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
a4c8d138 SR	479	printf ("Timeout\n");
	480	return 1;
	481	}
	482	/* show that we're waiting */
	483	if ((now - last) > 1000) { /* every second */
	484	putc ('.');
	485	last = now;
	486	}
	487	}
	488
	489	DONE:
	490	/* reset to read mode */
6d0f6bcf JCPV	491	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
6d0f6bcf JCPV	492	addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
a4c8d138 SR	493
	494	printf (" done\n");
	495	return 0;
	496	}
	497
	498	/*
	499	* Copy memory to flash, returns:
	500	* 0 - OK
	501	* 1 - write timeout
	502	* 2 - Flash not erased
	503	*/
	504	int write_buff(flash_info_t info, uchar src, ulong addr, ulong cnt)
	505	{
	506	ulong cp, wp, data;
	507	int i, l, rc;
	508
	509	wp = (addr & ~3); /* get lower word aligned address */
	510
	511	/*
	512	* handle unaligned start bytes
	513	*/
	514	if ((l = addr - wp) != 0) {
	515	data = 0;
	516	for (i=0, cp=wp; i<l; ++i, ++cp) {
	517	data = (data << 8) \| ((uchar )cp);
	518	}
	519	for (; i<4 && cnt>0; ++i) {
	520	data = (data << 8) \| *src++;
	521	--cnt;
	522	++cp;
	523	}
	524	for (; cnt==0 && i<4; ++i, ++cp) {
	525	data = (data << 8) \| ((uchar )cp);
	526	}
	527
	528	if ((rc = write_word(info, wp, data)) != 0) {
	529	return (rc);
	530	}
	531	wp += 4;
	532	}
	533
	534	/*
	535	* handle word aligned part
	536	*/
	537	while (cnt >= 4) {
	538	data = 0;
	539	for (i=0; i<4; ++i)
	540	data = (data << 8) \| *src++;
	541	if ((rc = write_word(info, wp, data)) != 0)
	542	return (rc);
	543	wp += 4;
	544	cnt -= 4;
	545	}
	546
	547	if (cnt == 0)
	548	return (0);
	549
	550	/*
	551	* handle unaligned tail bytes
	552	*/
	553	data = 0;
	554	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	555	data = (data << 8) \| *src++;
	556	--cnt;
557	}
558	for (; i<4; ++i, ++cp)
559	data = (data << 8) \| ((uchar )cp);
560
561	return (write_word(info, wp, data));
562	}
563
564	/*
565	* Write a word to Flash, returns:
566	* 0 - OK
567	* 1 - write timeout
568	* 2 - Flash not erased
569	*/
570	static int write_word(flash_info_t *info, ulong dest, ulong data)
571	{
6d0f6bcf JCPV	572	volatile CONFIG_SYS_FLASH_WORD_SIZE addr2 = (CONFIG_SYS_FLASH_WORD_SIZE )(info->start[0]);
	573	volatile CONFIG_SYS_FLASH_WORD_SIZE dest2 = (CONFIG_SYS_FLASH_WORD_SIZE )dest;
	574	volatile CONFIG_SYS_FLASH_WORD_SIZE data2 = (CONFIG_SYS_FLASH_WORD_SIZE )&data;
a4c8d138 SR	575	ulong start;
	576	int flag;
	577	int i;
	578
	579	/* Check if Flash is (sufficiently) erased */
	580	if ((((vu_long )dest) & data) != data)
	581	return (2);
	582
	583	/* Disable interrupts which might cause a timeout here */
	584	flag = disable_interrupts();
	585
6d0f6bcf JCPV	586	for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
	587	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	588	addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	589	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
a4c8d138 SR	590
	591	dest2[i] = data2[i];
	592
	593	/* re-enable interrupts if necessary */
	594	if (flag)
	595	enable_interrupts();
	596
	597	/* data polling for D7 */
	598	start = get_timer (0);
6d0f6bcf JCPV	599	while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
	600	(data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
	601	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
a4c8d138 SR	602	return (1);
	603	}
	604	}
	605
	606	return (0);
	607	}