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

/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Modified 4/5/2001
 * Wait for completion of each sector erase command issued
 * 4/5/2001
 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
 */

#include <common.h>
#include <ppc4xx.h>
#include <asm/processor.h>

#if CONFIG_SYS_MAX_FLASH_BANKS != 1
#error "CONFIG_SYS_MAX_FLASH_BANKS must be 1"
#endif
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];	/* info for FLASH chips	*/

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

#define ADDR0		0x5555
#define ADDR1		0x2aaa
#define FLASH_WORD_SIZE unsigned char

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

unsigned long flash_init (void)
{
	unsigned long size_b0;

	/* Init: no FLASHes known */
	flash_info[0].flash_id = FLASH_UNKNOWN;

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

	size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0 << 20);
	}

	/* Only one bank */
	/* Setup offsets */
	flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);

	/* Monitor protection ON by default */
	(void) flash_protect (FLAG_PROTECT_SET,
			      FLASH_BASE0_PRELIM,
			      FLASH_BASE0_PRELIM + monitor_flash_len - 1,
			      &flash_info[0]);
	flash_info[0].size = size_b0;

	return size_b0;
}


/*-----------------------------------------------------------------------
 */
/*
 * This implementation assumes that the flash chips are uniform sector
 * devices. This is true for all likely JSE devices.
 */
static void flash_get_offsets (ulong base, flash_info_t * info)
{
	unsigned idx;
	unsigned long sector_size = info->size / info->sector_count;

	for (idx = 0; idx < info->sector_count; idx += 1) {
		info->start[idx] = base + (idx * sector_size);
	}
}

/*-----------------------------------------------------------------------
 */
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;
	default:
		printf ("Unknown Vendor ");
		break;
	}

	  /* (Reduced table of only parts expected in JSE boards.) */
	switch (info->flash_id) {
	case FLASH_MAN_AMD | FLASH_AM040:
		printf ("AM29F040 (512 Kbit, uniform sector size)\n");
		break;
	case FLASH_MAN_STM | FLASH_AM040:
		printf ("MM29W040W (512 Kbit, uniform sector size)\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!
 */
static ulong flash_get_size (vu_long * addr, flash_info_t * info)
{
	short i;
	FLASH_WORD_SIZE value;
	ulong base = (ulong) addr;
	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;

	/* Write auto select command: read Manufacturer ID */
	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;

	value = addr2[0];

	switch (value) {
	case (FLASH_WORD_SIZE) AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FLASH_WORD_SIZE) FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (FLASH_WORD_SIZE) SST_MANUFACT:
		info->flash_id = FLASH_MAN_SST;
		break;
	case (FLASH_WORD_SIZE)STM_MANUFACT:
		info->flash_id = FLASH_MAN_STM;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		printf("Unknown flash manufacturer code: 0x%x\n", value);
		return (0);	/* no or unknown flash  */
	}

	value = addr2[1];	/* device ID		*/

	switch (value) {
	case (FLASH_WORD_SIZE) AMD_ID_F040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000;	/* => 512 ko */
		break;
	case (FLASH_WORD_SIZE) AMD_ID_LV040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000;	/* => 512 ko */
		break;
	case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000; /* => 512 ko */
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);	/* => no or unknown flash */

	}

	  /* Calculate the sector offsets (Use JSE Optimized code). */
	flash_get_offsets(base, info);

	/* 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 FLASH_WORD_SIZE *) (info->start[i]);
		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
			info->protect[i] = 0;
		else
			info->protect[i] = addr2[2] & 1;
	}

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

	return (info->size);
}

int wait_for_DQ7 (flash_info_t * info, int sect)
{
	ulong start, now, last;
	volatile FLASH_WORD_SIZE *addr =
		(FLASH_WORD_SIZE *) (info->start[sect]);

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

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

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

	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 = (FLASH_WORD_SIZE *) (info->start[sect]);
			printf ("Erasing sector %p\n", addr2);	/* CLH */

			if ((info->flash_id & FLASH_VENDMASK) ==
			    FLASH_MAN_SST) {
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
				addr2[0] = (FLASH_WORD_SIZE) 0x00500050;	/* block erase */
				for (i = 0; i < 50; i++)
					udelay (1000);	/* wait 1 ms */
			} else {
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
				addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
				addr2[0] = (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 (info, sect);
		}
	}

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

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

#if 0
	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;
	wait_for_DQ7 (info, l_sect);

DONE:
#endif
	/* reset to read mode */
	addr = (FLASH_WORD_SIZE *) info->start[0];
	addr[0] = (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 FLASH_WORD_SIZE *addr2 =
		(FLASH_WORD_SIZE *) (info->start[0]);
	volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
	ulong start;
	int i;

	/* Check if Flash is (sufficiently) erased */
	if ((*((volatile FLASH_WORD_SIZE *) dest) &
	    (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
		return (2);
	}

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

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

		addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
		addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
		addr2[ADDR0] = (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] & (FLASH_WORD_SIZE) 0x00800080) !=
		       (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {

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

	return (0);
}
Commit	Line	Data
db01a2ea WD	1	/*
	2	* (C) Copyright 2000-2004
	3	* Wolfgang Denk, DENX Software Engineering, wd@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	/*
	25	* Modified 4/5/2001
	26	* Wait for completion of each sector erase command issued
	27	* 4/5/2001
	28	* Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
	29	*/
	30
	31	#include <common.h>
	32	#include <ppc4xx.h>
	33	#include <asm/processor.h>
	34
6d0f6bcf JCPV	35	#if CONFIG_SYS_MAX_FLASH_BANKS != 1
6d0f6bcf JCPV	36	#error "CONFIG_SYS_MAX_FLASH_BANKS must be 1"
db01a2ea	37	#endif
6d0f6bcf	38	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
db01a2ea WD	39
	40	/*-----------------------------------------------------------------------
	41	* Functions
	42	*/
	43	static ulong flash_get_size (vu_long * addr, flash_info_t * info);
	44	static int write_word (flash_info_t * info, ulong dest, ulong data);
	45	static void flash_get_offsets (ulong base, flash_info_t * info);
	46
6bdd1377 WD	47	#define ADDR0 0x5555
6bdd1377 WD	48	#define ADDR1 0x2aaa
db01a2ea WD	49	#define FLASH_WORD_SIZE unsigned char
	50
	51	/*-----------------------------------------------------------------------
	52	*/
	53
	54	unsigned long flash_init (void)
	55	{
	56	unsigned long size_b0;
db01a2ea WD	57
	58	/* Init: no FLASHes known */
	59	flash_info[0].flash_id = FLASH_UNKNOWN;
	60
	61	/* Static FLASH Bank configuration here - FIXME XXX */
	62
08f1080c	63	size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
db01a2ea WD	64
db01a2ea WD	65	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
08f1080c WD	66	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
08f1080c WD	67	size_b0, size_b0 << 20);
db01a2ea WD	68	}
	69
	70	/* Only one bank */
	71	/* Setup offsets */
	72	flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
	73
	74	/* Monitor protection ON by default */
	75	(void) flash_protect (FLAG_PROTECT_SET,
	76	FLASH_BASE0_PRELIM,
	77	FLASH_BASE0_PRELIM + monitor_flash_len - 1,
	78	&flash_info[0]);
	79	flash_info[0].size = size_b0;
	80
	81	return size_b0;
	82	}
	83
	84
	85	/*-----------------------------------------------------------------------
	86	*/
6bdd1377 WD	87	/*
	88	* This implementation assumes that the flash chips are uniform sector
	89	* devices. This is true for all likely JSE devices.
	90	*/
db01a2ea WD	91	static void flash_get_offsets (ulong base, flash_info_t * info)
db01a2ea WD	92	{
6bdd1377 WD	93	unsigned idx;
6bdd1377 WD	94	unsigned long sector_size = info->size / info->sector_count;
db01a2ea	95
6bdd1377 WD	96	for (idx = 0; idx < info->sector_count; idx += 1) {
6bdd1377 WD	97	info->start[idx] = base + (idx * sector_size);
db01a2ea WD	98	}
	99	}
	100
	101	/*-----------------------------------------------------------------------
	102	*/
	103	void flash_print_info (flash_info_t * info)
	104	{
	105	int i;
	106	int k;
	107	int size;
	108	int erased;
	109	volatile unsigned long *flash;
	110
	111	if (info->flash_id == FLASH_UNKNOWN) {
	112	printf ("missing or unknown FLASH type\n");
	113	return;
	114	}
	115
	116	switch (info->flash_id & FLASH_VENDMASK) {
	117	case FLASH_MAN_AMD:
	118	printf ("AMD ");
	119	break;
	120	case FLASH_MAN_FUJ:
	121	printf ("FUJITSU ");
	122	break;
	123	case FLASH_MAN_SST:
	124	printf ("SST ");
	125	break;
6bdd1377 WD	126	case FLASH_MAN_STM:
	127	printf ("ST Micro ");
	128	break;
db01a2ea WD	129	default:
	130	printf ("Unknown Vendor ");
	131	break;
	132	}
	133
6bdd1377 WD	134	/* (Reduced table of only parts expected in JSE boards.) */
	135	switch (info->flash_id) {
	136	case FLASH_MAN_AMD \| FLASH_AM040:
db01a2ea WD	137	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
db01a2ea WD	138	break;
6bdd1377 WD	139	case FLASH_MAN_STM \| FLASH_AM040:
6bdd1377 WD	140	printf ("MM29W040W (512 Kbit, uniform sector size)\n");
db01a2ea WD	141	break;
	142	default:
	143	printf ("Unknown Chip Type\n");
	144	break;
	145	}
	146
	147	printf (" Size: %ld KB in %d Sectors\n",
	148	info->size >> 10, info->sector_count);
	149
	150	printf (" Sector Start Addresses:");
	151	for (i = 0; i < info->sector_count; ++i) {
	152	/*
	153	* Check if whole sector is erased
	154	*/
	155	if (i != (info->sector_count - 1))
	156	size = info->start[i + 1] - info->start[i];
	157	else
	158	size = info->start[0] + info->size - info->start[i];
	159	erased = 1;
	160	flash = (volatile unsigned long *) info->start[i];
	161	size = size >> 2; /* divide by 4 for longword access */
	162	for (k = 0; k < size; k++) {
	163	if (*flash++ != 0xffffffff) {
	164	erased = 0;
	165	break;
	166	}
	167	}
	168
	169	if ((i % 5) == 0)
	170	printf ("\n ");
db01a2ea WD	171	printf (" %08lX%s%s",
	172	info->start[i],
	173	erased ? " E" : " ", info->protect[i] ? "RO " : " "
08f1080c	174	);
db01a2ea WD	175	}
	176	printf ("\n");
	177	return;
	178	}
	179
	180	/*-----------------------------------------------------------------------
	181	*/
	182
	183
	184	/*-----------------------------------------------------------------------
	185	*/
	186
	187	/*
	188	* The following code cannot be run from FLASH!
	189	*/
	190	static ulong flash_get_size (vu_long * addr, flash_info_t * info)
	191	{
	192	short i;
	193	FLASH_WORD_SIZE value;
	194	ulong base = (ulong) addr;
	195	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE ) addr;
	196
	197	/* Write auto select command: read Manufacturer ID */
	198	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	199	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	200	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
	201
db01a2ea	202	value = addr2[0];
db01a2ea WD	203
	204	switch (value) {
	205	case (FLASH_WORD_SIZE) AMD_MANUFACT:
	206	info->flash_id = FLASH_MAN_AMD;
	207	break;
	208	case (FLASH_WORD_SIZE) FUJ_MANUFACT:
	209	info->flash_id = FLASH_MAN_FUJ;
	210	break;
	211	case (FLASH_WORD_SIZE) SST_MANUFACT:
	212	info->flash_id = FLASH_MAN_SST;
	213	break;
6bdd1377 WD	214	case (FLASH_WORD_SIZE)STM_MANUFACT:
	215	info->flash_id = FLASH_MAN_STM;
	216	break;
db01a2ea WD	217	default:
	218	info->flash_id = FLASH_UNKNOWN;
	219	info->sector_count = 0;
	220	info->size = 0;
6bdd1377	221	printf("Unknown flash manufacturer code: 0x%x\n", value);
db01a2ea WD	222	return (0); /* no or unknown flash */
	223	}
	224
6bdd1377	225	value = addr2[1]; /* device ID */
db01a2ea WD	226
	227	switch (value) {
	228	case (FLASH_WORD_SIZE) AMD_ID_F040B:
	229	info->flash_id += FLASH_AM040;
	230	info->sector_count = 8;
	231	info->size = 0x0080000; /* => 512 ko */
	232	break;
	233	case (FLASH_WORD_SIZE) AMD_ID_LV040B:
	234	info->flash_id += FLASH_AM040;
	235	info->sector_count = 8;
	236	info->size = 0x0080000; /* => 512 ko */
	237	break;
6bdd1377 WD	238	case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */
	239	info->flash_id += FLASH_AM040;
	240	info->sector_count = 8;
	241	info->size = 0x0080000; /* => 512 ko */
	242	break;
db01a2ea WD	243	default:
	244	info->flash_id = FLASH_UNKNOWN;
	245	return (0); /* => no or unknown flash */
	246
	247	}
	248
6bdd1377 WD	249	/* Calculate the sector offsets (Use JSE Optimized code). */
6bdd1377 WD	250	flash_get_offsets(base, info);
db01a2ea WD	251
	252	/* check for protected sectors */
	253	for (i = 0; i < info->sector_count; i++) {
	254	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	255	/* D0 = 1 if protected */
db01a2ea WD	256	addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
	257	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
	258	info->protect[i] = 0;
	259	else
	260	info->protect[i] = addr2[2] & 1;
db01a2ea WD	261	}
	262
	263	/*
	264	* Prevent writes to uninitialized FLASH.
	265	*/
	266	if (info->flash_id != FLASH_UNKNOWN) {
db01a2ea WD	267	addr2 = (FLASH_WORD_SIZE *) info->start[0];
db01a2ea WD	268	addr2 = (FLASH_WORD_SIZE) 0x00F000F0; / reset bank */
db01a2ea WD	269	}
	270
	271	return (info->size);
	272	}
	273
	274	int wait_for_DQ7 (flash_info_t * info, int sect)
	275	{
	276	ulong start, now, last;
	277	volatile FLASH_WORD_SIZE *addr =
	278	(FLASH_WORD_SIZE *) (info->start[sect]);
	279
	280	start = get_timer (0);
	281	last = start;
	282	while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
	283	(FLASH_WORD_SIZE) 0x00800080) {
6d0f6bcf	284	if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
db01a2ea WD	285	printf ("Timeout\n");
	286	return -1;
	287	}
	288	/* show that we're waiting */
	289	if ((now - last) > 1000) { /* every second */
	290	putc ('.');
	291	last = now;
	292	}
	293	}
	294	return 0;
	295	}
	296
	297	/*-----------------------------------------------------------------------
	298	*/
	299
	300	int flash_erase (flash_info_t * info, int s_first, int s_last)
	301	{
	302	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE ) (info->start[0]);
	303	volatile FLASH_WORD_SIZE *addr2;
	304	int flag, prot, sect, l_sect;
	305	int i;
	306
	307	if ((s_first < 0) \|\| (s_first > s_last)) {
	308	if (info->flash_id == FLASH_UNKNOWN) {
	309	printf ("- missing\n");
	310	} else {
	311	printf ("- no sectors to erase\n");
	312	}
	313	return 1;
	314	}
	315
	316	if (info->flash_id == FLASH_UNKNOWN) {
	317	printf ("Can't erase unknown flash type - aborted\n");
	318	return 1;
	319	}
	320
	321	prot = 0;
	322	for (sect = s_first; sect <= s_last; ++sect) {
	323	if (info->protect[sect]) {
	324	prot++;
	325	}
	326	}
	327
	328	if (prot) {
	329	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	330	} else {
	331	printf ("\n");
	332	}
	333
	334	l_sect = -1;
	335
	336	/* Disable interrupts which might cause a timeout here */
	337	flag = disable_interrupts ();
	338
	339	/* Start erase on unprotected sectors */
	340	for (sect = s_first; sect <= s_last; sect++) {
	341	if (info->protect[sect] == 0) { /* not protected */
	342	addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
	343	printf ("Erasing sector %p\n", addr2); /* CLH */
	344
	345	if ((info->flash_id & FLASH_VENDMASK) ==
	346	FLASH_MAN_SST) {
	347	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	348	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
349	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
350	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
351	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
352	addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
353	for (i = 0; i < 50; i++)
354	udelay (1000); /* wait 1 ms */
355	} else {
356	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
357	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
358	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
359	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
360	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
361	addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
362	}
363	l_sect = sect;
364	/*
365	* Wait for each sector to complete, it's more
366	* reliable. According to AMD Spec, you must
367	* issue all erase commands within a specified
368	* timeout. This has been seen to fail, especially
369	* if printf()s are included (for debug)!!
370	*/
371	wait_for_DQ7 (info, sect);
372	}
373	}
374
375	/* re-enable interrupts if necessary */
376	if (flag)
377	enable_interrupts ();
378
379	/* wait at least 80us - let's wait 1 ms */
380	udelay (1000);
381
382	#if 0
383	/*
384	* We wait for the last triggered sector
385	*/
386	if (l_sect < 0)
387	goto DONE;
388	wait_for_DQ7 (info, l_sect);
389
6bdd1377	390	DONE:
db01a2ea WD	391	#endif
	392	/* reset to read mode */
	393	addr = (FLASH_WORD_SIZE *) info->start[0];
	394	addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
	395
	396	printf (" done\n");
	397	return 0;
	398	}
	399
	400	/*-----------------------------------------------------------------------
	401	* Copy memory to flash, returns:
	402	* 0 - OK
	403	* 1 - write timeout
	404	* 2 - Flash not erased
	405	*/
	406
	407	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	408	{
	409	ulong cp, wp, data;
	410	int i, l, rc;
	411
	412	wp = (addr & ~3); /* get lower word aligned address */
	413
	414	/*
	415	* handle unaligned start bytes
	416	*/
	417	if ((l = addr - wp) != 0) {
	418	data = 0;
	419	for (i = 0, cp = wp; i < l; ++i, ++cp) {
	420	data = (data << 8) \| ((uchar ) cp);
	421	}
	422	for (; i < 4 && cnt > 0; ++i) {
	423	data = (data << 8) \| *src++;
	424	--cnt;
	425	++cp;
	426	}
	427	for (; cnt == 0 && i < 4; ++i, ++cp) {
	428	data = (data << 8) \| ((uchar ) cp);
	429	}
	430
	431	if ((rc = write_word (info, wp, data)) != 0) {
	432	return (rc);
	433	}
	434	wp += 4;
	435	}
	436
	437	/*
	438	* handle word aligned part
	439	*/
	440	while (cnt >= 4) {
	441	data = 0;
	442	for (i = 0; i < 4; ++i) {
	443	data = (data << 8) \| *src++;
	444	}
	445	if ((rc = write_word (info, wp, data)) != 0) {
	446	return (rc);
	447	}
	448	wp += 4;
	449	cnt -= 4;
	450	}
	451
	452	if (cnt == 0) {
	453	return (0);
	454	}
455
456	/*
457	* handle unaligned tail bytes
458	*/
459	data = 0;
460	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
461	data = (data << 8) \| *src++;
462	--cnt;
463	}
464	for (; i < 4; ++i, ++cp) {
465	data = (data << 8) \| ((uchar ) cp);
466	}
467
468	return (write_word (info, wp, data));
469	}
470
471	/*-----------------------------------------------------------------------
472	* Write a word to Flash, returns:
473	* 0 - OK
474	* 1 - write timeout
475	* 2 - Flash not erased
476	*/
477	static int write_word (flash_info_t * info, ulong dest, ulong data)
478	{
479	volatile FLASH_WORD_SIZE *addr2 =
480	(FLASH_WORD_SIZE *) (info->start[0]);
481	volatile FLASH_WORD_SIZE dest2 = (FLASH_WORD_SIZE ) dest;
482	volatile FLASH_WORD_SIZE data2 = (FLASH_WORD_SIZE ) & data;
483	ulong start;
484	int i;
485
486	/* Check if Flash is (sufficiently) erased */
487	if ((((volatile FLASH_WORD_SIZE ) dest) &
6bdd1377	488	(FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
db01a2ea WD	489	return (2);
	490	}
	491
	492	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
	493	int flag;
	494
	495	/* Disable interrupts which might cause a timeout here */
	496	flag = disable_interrupts ();
	497
	498	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	499	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	500	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
	501
	502	dest2[i] = data2[i];
	503
	504	/* re-enable interrupts if necessary */
	505	if (flag)
	506	enable_interrupts ();
	507
	508	/* data polling for D7 */
	509	start = get_timer (0);
	510	while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
	511	(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
	512
6d0f6bcf	513	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
db01a2ea WD	514	return (1);
	515	}
	516	}
	517	}
	518
	519	return (0);
	520	}