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

/*
 * (C) Copyright 2006
 * Stefan Roese, DENX Software Engineering, sr@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 <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	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <asm/processor.h>
	26
6d0f6bcf JCPV	27	#ifndef CONFIG_SYS_FLASH_READ0
	28	#define CONFIG_SYS_FLASH_READ0 0x0000 /* 0 is standard */
	29	#define CONFIG_SYS_FLASH_READ1 0x0001 /* 1 is standard */
	30	#define CONFIG_SYS_FLASH_READ2 0x0002 /* 2 is standard */
a4c8d138 SR	31	#endif
a4c8d138 SR	32
6d0f6bcf	33	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
a4c8d138 SR	34
	35	/*
	36	* Functions
	37	*/
	38	static int write_word(flash_info_t *info, ulong dest, ulong data);
	39	static ulong flash_get_size(vu_long addr, flash_info_t info);
	40
	41	unsigned long flash_init(void)
	42	{
	43	unsigned long size_b0, size_b1;
	44	int i;
	45	unsigned long base_b0, base_b1;
	46
	47	/* Init: no FLASHes known */
6d0f6bcf	48	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
a4c8d138 SR	49	flash_info[i].flash_id = FLASH_UNKNOWN;
	50	}
	51
	52	/* Static FLASH Bank configuration here - FIXME XXX */
	53
	54	base_b0 = FLASH_BASE0_PRELIM;
	55	size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
	56
	57	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	58	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	59	size_b0, size_b0 << 20);
	60	}
	61
	62	base_b1 = FLASH_BASE1_PRELIM;
	63	size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
	64
	65	return (size_b0 + size_b1);
	66	}
	67
	68	void flash_print_info(flash_info_t *info)
	69	{
	70	int i;
	71	int k;
	72	int size;
	73	int erased;
	74	volatile unsigned long *flash;
	75
	76	if (info->flash_id == FLASH_UNKNOWN) {
	77	printf ("missing or unknown FLASH type\n");
	78	return;
	79	}
	80
	81	switch (info->flash_id & FLASH_VENDMASK) {
	82	case FLASH_MAN_AMD: printf ("AMD "); break;
	83	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	84	case FLASH_MAN_SST: printf ("SST "); break;
96e1d75b	85	case FLASH_MAN_STM: printf ("ST Micro"); break;
a4c8d138	86	case FLASH_MAN_EXCEL: printf ("Excel Semiconductor "); break;
566a494f	87	case FLASH_MAN_MX: printf ("MXIC "); break;
a4c8d138 SR	88	default: printf ("Unknown Vendor "); break;
	89	}
	90
	91	switch (info->flash_id & FLASH_TYPEMASK) {
	92	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	93	break;
	94	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	95	break;
	96	case FLASH_AM040: printf ("AM29LV040B (4 Mbit, uniform sector size)\n");
	97	break;
	98	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	99	break;
	100	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	101	break;
	102	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	103	break;
	104	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	105	break;
	106	case FLASH_AM320T: printf ("AM29LV320T (32 M, top sector)\n");
	107	break;
	108	case FLASH_AM320B: printf ("AM29LV320B (32 M, bottom sector)\n");
	109	break;
	110	case FLASH_AMDL322T: printf ("AM29DL322T (32 M, top sector)\n");
	111	break;
	112	case FLASH_AMDL322B: printf ("AM29DL322B (32 M, bottom sector)\n");
	113	break;
	114	case FLASH_AMDL323T: printf ("AM29DL323T (32 M, top sector)\n");
	115	break;
	116	case FLASH_AMDL323B: printf ("AM29DL323B (32 M, bottom sector)\n");
	117	break;
	118	case FLASH_SST020: printf ("SST39LF/VF020 (2 Mbit, uniform sector size)\n");
	119	break;
	120	case FLASH_SST040: printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
	121	break;
96e1d75b HS	122	case STM_ID_M29W040B: printf ("ST Micro M29W040B (4 Mbit, uniform sector size)\n");
96e1d75b HS	123	break;
a4c8d138 SR	124	default: printf ("Unknown Chip Type\n");
	125	break;
	126	}
	127
	128	printf (" Size: %ld MB in %d Sectors\n",
	129	info->size >> 20, info->sector_count);
	130
	131	printf (" Sector Start Addresses:");
	132	for (i=0; i<info->sector_count; ++i) {
6d0f6bcf	133	#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
a4c8d138 SR	134	/*
	135	* Check if whole sector is erased
	136	*/
	137	if (i != (info->sector_count-1))
	138	size = info->start[i+1] - info->start[i];
	139	else
	140	size = info->start[0] + info->size - info->start[i];
	141	erased = 1;
	142	flash = (volatile unsigned long *)info->start[i];
2fd9eb50	143	size = size >> 2; /* divide by 4 for longword access */
a4c8d138 SR	144	for (k=0; k<size; k++) {
	145	if (*flash++ != 0xffffffff) {
	146	erased = 0;
	147	break;
	148	}
	149	}
	150
	151	if ((i % 5) == 0)
	152	printf ("\n ");
	153	/* print empty and read-only info */
	154	printf (" %08lX%s%s",
	155	info->start[i],
	156	erased ? " E" : " ",
	157	info->protect[i] ? "RO " : " ");
	158	#else
	159	if ((i % 5) == 0)
	160	printf ("\n ");
	161	printf (" %08lX%s",
	162	info->start[i],
	163	info->protect[i] ? " (RO)" : " ");
	164	#endif
	165
	166	}
	167	printf ("\n");
	168	return;
	169	}
	170
	171	/*
	172	* The following code cannot be run from FLASH!
	173	*/
	174	static ulong flash_get_size(vu_long addr, flash_info_t info)
	175	{
	176	short i;
	177	short n;
6d0f6bcf	178	volatile CONFIG_SYS_FLASH_WORD_SIZE value;
a4c8d138	179	ulong base = (ulong)addr;
6d0f6bcf	180	volatile CONFIG_SYS_FLASH_WORD_SIZE addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE )addr;
a4c8d138 SR	181
a4c8d138 SR	182	/* Write auto select command: read Manufacturer ID */
6d0f6bcf JCPV	183	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	184	addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	185	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
a4c8d138	186
6d0f6bcf	187	value = addr2[CONFIG_SYS_FLASH_READ0];
a4c8d138 SR	188
a4c8d138 SR	189	switch (value) {
6d0f6bcf	190	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
a4c8d138 SR	191	info->flash_id = FLASH_MAN_AMD;
a4c8d138 SR	192	break;
6d0f6bcf	193	case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
a4c8d138 SR	194	info->flash_id = FLASH_MAN_FUJ;
a4c8d138 SR	195	break;
6d0f6bcf	196	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
a4c8d138 SR	197	info->flash_id = FLASH_MAN_SST;
a4c8d138 SR	198	break;
6d0f6bcf	199	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
96e1d75b HS	200	info->flash_id = FLASH_MAN_STM;
96e1d75b HS	201	break;
6d0f6bcf	202	case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
a4c8d138 SR	203	info->flash_id = FLASH_MAN_EXCEL;
a4c8d138 SR	204	break;
6d0f6bcf	205	case (CONFIG_SYS_FLASH_WORD_SIZE)MX_MANUFACT:
566a494f HS	206	info->flash_id = FLASH_MAN_MX;
566a494f HS	207	break;
a4c8d138 SR	208	default:
	209	info->flash_id = FLASH_UNKNOWN;
	210	info->sector_count = 0;
	211	info->size = 0;
	212	return (0); /* no or unknown flash */
	213	}
	214
6d0f6bcf	215	value = addr2[CONFIG_SYS_FLASH_READ1]; /* device ID */
a4c8d138 SR	216
a4c8d138 SR	217	switch (value) {
6d0f6bcf	218	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
a4c8d138 SR	219	info->flash_id += FLASH_AM400T;
	220	info->sector_count = 11;
	221	info->size = 0x00080000;
2fd9eb50	222	break; /* => 0.5 MB */
a4c8d138	223
6d0f6bcf	224	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
a4c8d138 SR	225	info->flash_id += FLASH_AM400B;
	226	info->sector_count = 11;
	227	info->size = 0x00080000;
2fd9eb50	228	break; /* => 0.5 MB */
a4c8d138	229
6d0f6bcf	230	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV040B:
2fd9eb50 WD	231	info->flash_id += FLASH_AM040;
	232	info->sector_count = 8;
	233	info->size = 0x0080000; /* => 0.5 MB */
	234	break;
6d0f6bcf	235	case (CONFIG_SYS_FLASH_WORD_SIZE)STM_ID_M29W040B:
96e1d75b HS	236	info->flash_id += FLASH_AM040;
	237	info->sector_count = 8;
	238	info->size = 0x0080000; /* => 0,5 MB */
	239	break;
a4c8d138	240
6d0f6bcf	241	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
a4c8d138 SR	242	info->flash_id += FLASH_AM800T;
	243	info->sector_count = 19;
	244	info->size = 0x00100000;
2fd9eb50	245	break; /* => 1 MB */
a4c8d138	246
6d0f6bcf	247	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
a4c8d138 SR	248	info->flash_id += FLASH_AM800B;
	249	info->sector_count = 19;
	250	info->size = 0x00100000;
2fd9eb50	251	break; /* => 1 MB */
a4c8d138	252
6d0f6bcf	253	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
a4c8d138 SR	254	info->flash_id += FLASH_AM160T;
	255	info->sector_count = 35;
	256	info->size = 0x00200000;
2fd9eb50	257	break; /* => 2 MB */
a4c8d138	258
6d0f6bcf	259	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
a4c8d138 SR	260	info->flash_id += FLASH_AM160B;
	261	info->sector_count = 35;
	262	info->size = 0x00200000;
2fd9eb50	263	break; /* => 2 MB */
a4c8d138	264
6d0f6bcf	265	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
a4c8d138 SR	266	info->flash_id += FLASH_AM320T;
a4c8d138 SR	267	info->sector_count = 71;
2fd9eb50 WD	268	info->size = 0x00400000;
2fd9eb50 WD	269	break; /* => 4 MB */
a4c8d138	270
6d0f6bcf	271	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
a4c8d138 SR	272	info->flash_id += FLASH_AM320B;
a4c8d138 SR	273	info->sector_count = 71;
2fd9eb50 WD	274	info->size = 0x00400000;
2fd9eb50 WD	275	break; /* => 4 MB */
a4c8d138	276
6d0f6bcf	277	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
a4c8d138 SR	278	info->flash_id += FLASH_AMDL322T;
a4c8d138 SR	279	info->sector_count = 71;
2fd9eb50 WD	280	info->size = 0x00400000;
2fd9eb50 WD	281	break; /* => 4 MB */
a4c8d138	282
6d0f6bcf	283	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
a4c8d138 SR	284	info->flash_id += FLASH_AMDL322B;
a4c8d138 SR	285	info->sector_count = 71;
2fd9eb50 WD	286	info->size = 0x00400000;
2fd9eb50 WD	287	break; /* => 4 MB */
a4c8d138	288
6d0f6bcf	289	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
a4c8d138 SR	290	info->flash_id += FLASH_AMDL323T;
a4c8d138 SR	291	info->sector_count = 71;
2fd9eb50 WD	292	info->size = 0x00400000;
2fd9eb50 WD	293	break; /* => 4 MB */
a4c8d138	294
6d0f6bcf	295	case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
a4c8d138 SR	296	info->flash_id += FLASH_AMDL323B;
a4c8d138 SR	297	info->sector_count = 71;
2fd9eb50 WD	298	info->size = 0x00400000;
2fd9eb50 WD	299	break; /* => 4 MB */
a4c8d138	300
6d0f6bcf	301	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF020:
a4c8d138 SR	302	info->flash_id += FLASH_SST020;
	303	info->sector_count = 64;
	304	info->size = 0x00040000;
2fd9eb50	305	break; /* => 256 kB */
a4c8d138	306
6d0f6bcf	307	case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF040:
a4c8d138 SR	308	info->flash_id += FLASH_SST040;
	309	info->sector_count = 128;
	310	info->size = 0x00080000;
2fd9eb50	311	break; /* => 512 kB */
a4c8d138 SR	312
	313	default:
	314	info->flash_id = FLASH_UNKNOWN;
	315	return (0); /* => no or unknown flash */
	316
	317	}
	318
	319	/* set up sector start address table */
	320	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) \|\|
	321	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
	322	for (i = 0; i < info->sector_count; i++)
	323	info->start[i] = base + (i * 0x00001000);
	324	} else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
	325	for (i = 0; i < info->sector_count; i++)
	326	info->start[i] = base + (i * 0x00010000);
	327	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) \|\|
	328	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) \|\|
	329	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) \|\|
	330	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
	331	/* set sector offsets for bottom boot block type */
	332	for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
	333	info->start[i] = base;
	334	base += 8 << 10;
	335	}
	336	while (i < info->sector_count) { /* 64k regular sectors */
	337	info->start[i] = base;
	338	base += 64 << 10;
	339	++i;
	340	}
	341	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) \|\|
	342	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) \|\|
	343	((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) \|\|
	344	((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
	345	/* set sector offsets for top boot block type */
	346	base += info->size;
	347	i = info->sector_count;
	348	for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
	349	base -= 8 << 10;
	350	--i;
	351	info->start[i] = base;
	352	}
	353	while (i > 0) { /* 64k regular sectors */
	354	base -= 64 << 10;
	355	--i;
	356	info->start[i] = base;
	357	}
	358	} else {
	359	if (info->flash_id & FLASH_BTYPE) {
	360	/* set sector offsets for bottom boot block type */
	361	info->start[0] = base + 0x00000000;
	362	info->start[1] = base + 0x00004000;
	363	info->start[2] = base + 0x00006000;
	364	info->start[3] = base + 0x00008000;
	365	for (i = 4; i < info->sector_count; i++) {
	366	info->start[i] = base + (i * 0x00010000) - 0x00030000;
	367	}
	368	} else {
	369	/* set sector offsets for top boot block type */
	370	i = info->sector_count - 1;
	371	info->start[i--] = base + info->size - 0x00004000;
	372	info->start[i--] = base + info->size - 0x00006000;
	373	info->start[i--] = base + info->size - 0x00008000;
	374	for (; i >= 0; i--) {
	375	info->start[i] = base + i * 0x00010000;
376	}
377	}
378	}
379
380	/* check for protected sectors */
381	for (i = 0; i < info->sector_count; i++) {
382	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
383	/* D0 = 1 if protected */
6d0f6bcf	384	addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
a4c8d138 SR	385	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
	386	info->protect[i] = 0;
	387	else
6d0f6bcf	388	info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
a4c8d138 SR	389	}
	390
	391	/*
	392	* Prevent writes to uninitialized FLASH.
	393	*/
	394	if (info->flash_id != FLASH_UNKNOWN) {
6d0f6bcf JCPV	395	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
6d0f6bcf JCPV	396	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; / reset bank */
a4c8d138 SR	397	}
	398
	399	return (info->size);
	400	}
	401
	402
	403	int flash_erase(flash_info_t *info, int s_first, int s_last)
	404	{
6d0f6bcf JCPV	405	volatile CONFIG_SYS_FLASH_WORD_SIZE addr = (CONFIG_SYS_FLASH_WORD_SIZE )(info->start[0]);
6d0f6bcf JCPV	406	volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
a4c8d138 SR	407	int flag, prot, sect, l_sect;
	408	ulong start, now, last;
	409
	410	if ((s_first < 0) \|\| (s_first > s_last)) {
	411	if (info->flash_id == FLASH_UNKNOWN)
	412	printf ("- missing\n");
	413	else
	414	printf ("- no sectors to erase\n");
	415	return 1;
	416	}
	417
	418	if (info->flash_id == FLASH_UNKNOWN) {
	419	printf ("Can't erase unknown flash type - aborted\n");
	420	return 1;
	421	}
	422
	423	prot = 0;
	424	for (sect=s_first; sect<=s_last; ++sect)
	425	if (info->protect[sect])
	426	prot++;
	427
	428	if (prot)
	429	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	430	else
	431	printf ("\n");
	432
	433	l_sect = -1;
	434
	435	/* Disable interrupts which might cause a timeout here */
	436	flag = disable_interrupts();
	437
	438	/* Start erase on unprotected sectors */
	439	for (sect = s_first; sect<=s_last; sect++) {
	440	if (info->protect[sect] == 0) { /* not protected */
6d0f6bcf	441	addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
a4c8d138	442	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
6d0f6bcf JCPV	443	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	444	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	445	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
	446	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	447	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	448	addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030; /* sector erase */
a4c8d138 SR	449
	450	/* re-enable interrupts if necessary */
	451	if (flag) {
	452	enable_interrupts();
	453	flag = 0;
	454	}
	455
	456	/* data polling for D7 */
	457	start = get_timer (0);
6d0f6bcf JCPV	458	while ((addr2[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
	459	(CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
	460	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
a4c8d138 SR	461	return (1);
	462	}
	463	} else {
	464	if (sect == s_first) {
6d0f6bcf JCPV	465	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	466	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	467	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
	468	addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	469	addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
a4c8d138	470	}
6d0f6bcf	471	addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030; /* sector erase */
a4c8d138 SR	472	}
	473	l_sect = sect;
	474	}
	475	}
	476
	477	/* re-enable interrupts if necessary */
	478	if (flag)
	479	enable_interrupts();
	480
	481	/* wait at least 80us - let's wait 1 ms */
	482	udelay (1000);
	483
	484	/*
	485	* We wait for the last triggered sector
	486	*/
	487	if (l_sect < 0)
	488	goto DONE;
	489
	490	start = get_timer (0);
	491	last = start;
6d0f6bcf JCPV	492	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
	493	while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
	494	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
a4c8d138 SR	495	printf ("Timeout\n");
	496	return 1;
	497	}
	498	/* show that we're waiting */
	499	if ((now - last) > 1000) { /* every second */
	500	putc ('.');
	501	last = now;
	502	}
	503	}
	504
	505	DONE:
	506	/* reset to read mode */
6d0f6bcf JCPV	507	addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
6d0f6bcf JCPV	508	addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
a4c8d138 SR	509
	510	printf (" done\n");
	511	return 0;
	512	}
	513
	514	/*
	515	* Copy memory to flash, returns:
	516	* 0 - OK
	517	* 1 - write timeout
	518	* 2 - Flash not erased
	519	*/
	520	int write_buff(flash_info_t info, uchar src, ulong addr, ulong cnt)
	521	{
	522	ulong cp, wp, data;
	523	int i, l, rc;
	524
	525	wp = (addr & ~3); /* get lower word aligned address */
	526
	527	/*
	528	* handle unaligned start bytes
	529	*/
	530	if ((l = addr - wp) != 0) {
	531	data = 0;
	532	for (i=0, cp=wp; i<l; ++i, ++cp) {
	533	data = (data << 8) \| ((uchar )cp);
	534	}
	535	for (; i<4 && cnt>0; ++i) {
	536	data = (data << 8) \| *src++;
	537	--cnt;
	538	++cp;
	539	}
	540	for (; cnt==0 && i<4; ++i, ++cp) {
	541	data = (data << 8) \| ((uchar )cp);
	542	}
	543
	544	if ((rc = write_word(info, wp, data)) != 0) {
	545	return (rc);
	546	}
	547	wp += 4;
	548	}
	549
	550	/*
	551	* handle word aligned part
	552	*/
	553	while (cnt >= 4) {
	554	data = 0;
	555	for (i=0; i<4; ++i)
	556	data = (data << 8) \| *src++;
	557	if ((rc = write_word(info, wp, data)) != 0)
	558	return (rc);
	559	wp += 4;
	560	cnt -= 4;
	561	}
	562
	563	if (cnt == 0)
	564	return (0);
	565
	566	/*
	567	* handle unaligned tail bytes
	568	*/
	569	data = 0;
	570	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	571	data = (data << 8) \| *src++;
	572	--cnt;
573	}
574	for (; i<4; ++i, ++cp)
575	data = (data << 8) \| ((uchar )cp);
576
577	return (write_word(info, wp, data));
578	}
579
580	/*
581	* Write a word to Flash, returns:
582	* 0 - OK
583	* 1 - write timeout
584	* 2 - Flash not erased
585	*/
586	static int write_word(flash_info_t *info, ulong dest, ulong data)
587	{
6d0f6bcf JCPV	588	volatile CONFIG_SYS_FLASH_WORD_SIZE addr2 = (CONFIG_SYS_FLASH_WORD_SIZE )(info->start[0]);
	589	volatile CONFIG_SYS_FLASH_WORD_SIZE dest2 = (CONFIG_SYS_FLASH_WORD_SIZE )dest;
	590	volatile CONFIG_SYS_FLASH_WORD_SIZE data2 = (CONFIG_SYS_FLASH_WORD_SIZE )&data;
a4c8d138 SR	591	ulong start;
	592	int flag;
	593	int i;
	594
	595	/* Check if Flash is (sufficiently) erased */
	596	if ((((vu_long )dest) & data) != data)
	597	return (2);
	598
	599	/* Disable interrupts which might cause a timeout here */
	600	flag = disable_interrupts();
	601
6d0f6bcf JCPV	602	for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
	603	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
	604	addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
	605	addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
a4c8d138 SR	606
	607	dest2[i] = data2[i];
	608
	609	/* re-enable interrupts if necessary */
	610	if (flag)
	611	enable_interrupts();
	612
	613	/* data polling for D7 */
	614	start = get_timer (0);
6d0f6bcf JCPV	615	while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
	616	(data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
	617	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
a4c8d138 SR	618	return (1);
	619	}
	620	}
	621
	622	return (0);
	623	}