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

/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * 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 <asm/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;
	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");
	}

	/* 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 */
			}
			/*
			 * 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);

	/* 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	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
db01a2ea WD	6	*/
	7
	8	/*
	9	* Modified 4/5/2001
	10	* Wait for completion of each sector erase command issued
	11	* 4/5/2001
	12	* Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
	13	*/
	14
	15	#include <common.h>
b36df561	16	#include <asm/ppc4xx.h>
db01a2ea WD	17	#include <asm/processor.h>
db01a2ea WD	18
6d0f6bcf JCPV	19	#if CONFIG_SYS_MAX_FLASH_BANKS != 1
6d0f6bcf JCPV	20	#error "CONFIG_SYS_MAX_FLASH_BANKS must be 1"
db01a2ea	21	#endif
6d0f6bcf	22	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
db01a2ea WD	23
	24	/*-----------------------------------------------------------------------
	25	* Functions
	26	*/
	27	static ulong flash_get_size (vu_long * addr, flash_info_t * info);
	28	static int write_word (flash_info_t * info, ulong dest, ulong data);
	29	static void flash_get_offsets (ulong base, flash_info_t * info);
	30
6bdd1377 WD	31	#define ADDR0 0x5555
6bdd1377 WD	32	#define ADDR1 0x2aaa
db01a2ea WD	33	#define FLASH_WORD_SIZE unsigned char
	34
	35	/*-----------------------------------------------------------------------
	36	*/
	37
	38	unsigned long flash_init (void)
	39	{
	40	unsigned long size_b0;
db01a2ea WD	41
	42	/* Init: no FLASHes known */
	43	flash_info[0].flash_id = FLASH_UNKNOWN;
	44
	45	/* Static FLASH Bank configuration here - FIXME XXX */
	46
08f1080c	47	size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
db01a2ea WD	48
db01a2ea WD	49	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
08f1080c WD	50	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
08f1080c WD	51	size_b0, size_b0 << 20);
db01a2ea WD	52	}
	53
	54	/* Only one bank */
	55	/* Setup offsets */
	56	flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
	57
	58	/* Monitor protection ON by default */
	59	(void) flash_protect (FLAG_PROTECT_SET,
	60	FLASH_BASE0_PRELIM,
	61	FLASH_BASE0_PRELIM + monitor_flash_len - 1,
	62	&flash_info[0]);
	63	flash_info[0].size = size_b0;
	64
	65	return size_b0;
	66	}
	67
	68
	69	/*-----------------------------------------------------------------------
	70	*/
6bdd1377 WD	71	/*
	72	* This implementation assumes that the flash chips are uniform sector
	73	* devices. This is true for all likely JSE devices.
	74	*/
db01a2ea WD	75	static void flash_get_offsets (ulong base, flash_info_t * info)
db01a2ea WD	76	{
6bdd1377 WD	77	unsigned idx;
6bdd1377 WD	78	unsigned long sector_size = info->size / info->sector_count;
db01a2ea	79
6bdd1377 WD	80	for (idx = 0; idx < info->sector_count; idx += 1) {
6bdd1377 WD	81	info->start[idx] = base + (idx * sector_size);
db01a2ea WD	82	}
	83	}
	84
	85	/*-----------------------------------------------------------------------
	86	*/
	87	void flash_print_info (flash_info_t * info)
	88	{
	89	int i;
	90	int k;
	91	int size;
	92	int erased;
	93	volatile unsigned long *flash;
	94
	95	if (info->flash_id == FLASH_UNKNOWN) {
	96	printf ("missing or unknown FLASH type\n");
	97	return;
	98	}
	99
	100	switch (info->flash_id & FLASH_VENDMASK) {
	101	case FLASH_MAN_AMD:
	102	printf ("AMD ");
	103	break;
	104	case FLASH_MAN_FUJ:
	105	printf ("FUJITSU ");
	106	break;
	107	case FLASH_MAN_SST:
	108	printf ("SST ");
	109	break;
6bdd1377 WD	110	case FLASH_MAN_STM:
	111	printf ("ST Micro ");
	112	break;
db01a2ea WD	113	default:
	114	printf ("Unknown Vendor ");
	115	break;
	116	}
	117
6bdd1377 WD	118	/* (Reduced table of only parts expected in JSE boards.) */
	119	switch (info->flash_id) {
	120	case FLASH_MAN_AMD \| FLASH_AM040:
db01a2ea WD	121	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
db01a2ea WD	122	break;
6bdd1377 WD	123	case FLASH_MAN_STM \| FLASH_AM040:
6bdd1377 WD	124	printf ("MM29W040W (512 Kbit, uniform sector size)\n");
db01a2ea WD	125	break;
	126	default:
	127	printf ("Unknown Chip Type\n");
	128	break;
	129	}
	130
	131	printf (" Size: %ld KB in %d Sectors\n",
	132	info->size >> 10, info->sector_count);
	133
	134	printf (" Sector Start Addresses:");
	135	for (i = 0; i < info->sector_count; ++i) {
	136	/*
	137	* Check if whole sector is erased
	138	*/
	139	if (i != (info->sector_count - 1))
	140	size = info->start[i + 1] - info->start[i];
	141	else
	142	size = info->start[0] + info->size - info->start[i];
	143	erased = 1;
	144	flash = (volatile unsigned long *) info->start[i];
	145	size = size >> 2; /* divide by 4 for longword access */
	146	for (k = 0; k < size; k++) {
	147	if (*flash++ != 0xffffffff) {
	148	erased = 0;
	149	break;
	150	}
	151	}
	152
	153	if ((i % 5) == 0)
	154	printf ("\n ");
db01a2ea WD	155	printf (" %08lX%s%s",
	156	info->start[i],
	157	erased ? " E" : " ", info->protect[i] ? "RO " : " "
08f1080c	158	);
db01a2ea WD	159	}
	160	printf ("\n");
	161	return;
	162	}
	163
	164	/*-----------------------------------------------------------------------
	165	*/
	166
	167
	168	/*-----------------------------------------------------------------------
	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	FLASH_WORD_SIZE value;
	178	ulong base = (ulong) addr;
	179	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE ) addr;
	180
	181	/* Write auto select command: read Manufacturer ID */
	182	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	183	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	184	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
	185
db01a2ea	186	value = addr2[0];
db01a2ea WD	187
	188	switch (value) {
	189	case (FLASH_WORD_SIZE) AMD_MANUFACT:
	190	info->flash_id = FLASH_MAN_AMD;
	191	break;
	192	case (FLASH_WORD_SIZE) FUJ_MANUFACT:
	193	info->flash_id = FLASH_MAN_FUJ;
	194	break;
	195	case (FLASH_WORD_SIZE) SST_MANUFACT:
	196	info->flash_id = FLASH_MAN_SST;
	197	break;
6bdd1377 WD	198	case (FLASH_WORD_SIZE)STM_MANUFACT:
	199	info->flash_id = FLASH_MAN_STM;
	200	break;
db01a2ea WD	201	default:
	202	info->flash_id = FLASH_UNKNOWN;
	203	info->sector_count = 0;
	204	info->size = 0;
6bdd1377	205	printf("Unknown flash manufacturer code: 0x%x\n", value);
db01a2ea WD	206	return (0); /* no or unknown flash */
	207	}
	208
6bdd1377	209	value = addr2[1]; /* device ID */
db01a2ea WD	210
	211	switch (value) {
	212	case (FLASH_WORD_SIZE) AMD_ID_F040B:
	213	info->flash_id += FLASH_AM040;
	214	info->sector_count = 8;
	215	info->size = 0x0080000; /* => 512 ko */
	216	break;
	217	case (FLASH_WORD_SIZE) AMD_ID_LV040B:
	218	info->flash_id += FLASH_AM040;
	219	info->sector_count = 8;
	220	info->size = 0x0080000; /* => 512 ko */
	221	break;
6bdd1377 WD	222	case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */
	223	info->flash_id += FLASH_AM040;
	224	info->sector_count = 8;
	225	info->size = 0x0080000; /* => 512 ko */
	226	break;
db01a2ea WD	227	default:
	228	info->flash_id = FLASH_UNKNOWN;
	229	return (0); /* => no or unknown flash */
	230
	231	}
	232
6bdd1377 WD	233	/* Calculate the sector offsets (Use JSE Optimized code). */
6bdd1377 WD	234	flash_get_offsets(base, info);
db01a2ea WD	235
	236	/* check for protected sectors */
	237	for (i = 0; i < info->sector_count; i++) {
	238	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	239	/* D0 = 1 if protected */
db01a2ea WD	240	addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
	241	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
	242	info->protect[i] = 0;
	243	else
	244	info->protect[i] = addr2[2] & 1;
db01a2ea WD	245	}
	246
	247	/*
	248	* Prevent writes to uninitialized FLASH.
	249	*/
	250	if (info->flash_id != FLASH_UNKNOWN) {
db01a2ea WD	251	addr2 = (FLASH_WORD_SIZE *) info->start[0];
db01a2ea WD	252	addr2 = (FLASH_WORD_SIZE) 0x00F000F0; / reset bank */
db01a2ea WD	253	}
	254
	255	return (info->size);
	256	}
	257
	258	int wait_for_DQ7 (flash_info_t * info, int sect)
	259	{
	260	ulong start, now, last;
	261	volatile FLASH_WORD_SIZE *addr =
	262	(FLASH_WORD_SIZE *) (info->start[sect]);
	263
	264	start = get_timer (0);
	265	last = start;
	266	while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
	267	(FLASH_WORD_SIZE) 0x00800080) {
6d0f6bcf	268	if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
db01a2ea WD	269	printf ("Timeout\n");
	270	return -1;
	271	}
	272	/* show that we're waiting */
	273	if ((now - last) > 1000) { /* every second */
	274	putc ('.');
	275	last = now;
	276	}
	277	}
	278	return 0;
	279	}
	280
	281	/*-----------------------------------------------------------------------
	282	*/
	283
	284	int flash_erase (flash_info_t * info, int s_first, int s_last)
	285	{
	286	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE ) (info->start[0]);
	287	volatile FLASH_WORD_SIZE *addr2;
8e119b03	288	int flag, prot, sect;
db01a2ea WD	289	int i;
	290
	291	if ((s_first < 0) \|\| (s_first > s_last)) {
	292	if (info->flash_id == FLASH_UNKNOWN) {
	293	printf ("- missing\n");
	294	} else {
	295	printf ("- no sectors to erase\n");
	296	}
	297	return 1;
	298	}
	299
	300	if (info->flash_id == FLASH_UNKNOWN) {
	301	printf ("Can't erase unknown flash type - aborted\n");
	302	return 1;
	303	}
	304
	305	prot = 0;
	306	for (sect = s_first; sect <= s_last; ++sect) {
	307	if (info->protect[sect]) {
	308	prot++;
	309	}
	310	}
	311
	312	if (prot) {
	313	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	314	} else {
	315	printf ("\n");
	316	}
	317
db01a2ea WD	318	/* Disable interrupts which might cause a timeout here */
	319	flag = disable_interrupts ();
	320
	321	/* Start erase on unprotected sectors */
	322	for (sect = s_first; sect <= s_last; sect++) {
	323	if (info->protect[sect] == 0) { /* not protected */
	324	addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
	325	printf ("Erasing sector %p\n", addr2); /* CLH */
	326
	327	if ((info->flash_id & FLASH_VENDMASK) ==
	328	FLASH_MAN_SST) {
	329	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	330	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	331	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
	332	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	333	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	334	addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
	335	for (i = 0; i < 50; i++)
	336	udelay (1000); /* wait 1 ms */
	337	} else {
	338	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	339	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	340	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
	341	addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	342	addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	343	addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
	344	}
db01a2ea WD	345	/*
	346	* Wait for each sector to complete, it's more
	347	* reliable. According to AMD Spec, you must
	348	* issue all erase commands within a specified
	349	* timeout. This has been seen to fail, especially
	350	* if printf()s are included (for debug)!!
	351	*/
	352	wait_for_DQ7 (info, sect);
	353	}
	354	}
	355
	356	/* re-enable interrupts if necessary */
	357	if (flag)
	358	enable_interrupts ();
	359
	360	/* wait at least 80us - let's wait 1 ms */
	361	udelay (1000);
	362
db01a2ea WD	363	/* reset to read mode */
	364	addr = (FLASH_WORD_SIZE *) info->start[0];
	365	addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
	366
	367	printf (" done\n");
	368	return 0;
	369	}
	370
	371	/*-----------------------------------------------------------------------
	372	* Copy memory to flash, returns:
	373	* 0 - OK
	374	* 1 - write timeout
	375	* 2 - Flash not erased
	376	*/
	377
	378	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	379	{
	380	ulong cp, wp, data;
	381	int i, l, rc;
	382
	383	wp = (addr & ~3); /* get lower word aligned address */
	384
	385	/*
	386	* handle unaligned start bytes
	387	*/
	388	if ((l = addr - wp) != 0) {
	389	data = 0;
	390	for (i = 0, cp = wp; i < l; ++i, ++cp) {
	391	data = (data << 8) \| ((uchar ) cp);
	392	}
	393	for (; i < 4 && cnt > 0; ++i) {
	394	data = (data << 8) \| *src++;
	395	--cnt;
	396	++cp;
	397	}
	398	for (; cnt == 0 && i < 4; ++i, ++cp) {
	399	data = (data << 8) \| ((uchar ) cp);
	400	}
	401
	402	if ((rc = write_word (info, wp, data)) != 0) {
	403	return (rc);
	404	}
	405	wp += 4;
	406	}
	407
	408	/*
	409	* handle word aligned part
	410	*/
	411	while (cnt >= 4) {
	412	data = 0;
	413	for (i = 0; i < 4; ++i) {
	414	data = (data << 8) \| *src++;
	415	}
	416	if ((rc = write_word (info, wp, data)) != 0) {
	417	return (rc);
	418	}
	419	wp += 4;
	420	cnt -= 4;
	421	}
	422
	423	if (cnt == 0) {
	424	return (0);
	425	}
	426
427	/*
428	* handle unaligned tail bytes
429	*/
430	data = 0;
431	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
432	data = (data << 8) \| *src++;
433	--cnt;
434	}
435	for (; i < 4; ++i, ++cp) {
436	data = (data << 8) \| ((uchar ) cp);
437	}
438
439	return (write_word (info, wp, data));
440	}
441
442	/*-----------------------------------------------------------------------
443	* Write a word to Flash, returns:
444	* 0 - OK
445	* 1 - write timeout
446	* 2 - Flash not erased
447	*/
448	static int write_word (flash_info_t * info, ulong dest, ulong data)
449	{
450	volatile FLASH_WORD_SIZE *addr2 =
451	(FLASH_WORD_SIZE *) (info->start[0]);
452	volatile FLASH_WORD_SIZE dest2 = (FLASH_WORD_SIZE ) dest;
453	volatile FLASH_WORD_SIZE data2 = (FLASH_WORD_SIZE ) & data;
454	ulong start;
455	int i;
456
457	/* Check if Flash is (sufficiently) erased */
458	if ((((volatile FLASH_WORD_SIZE ) dest) &
6bdd1377	459	(FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
db01a2ea WD	460	return (2);
	461	}
	462
	463	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
	464	int flag;
	465
	466	/* Disable interrupts which might cause a timeout here */
	467	flag = disable_interrupts ();
	468
	469	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
	470	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
	471	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
	472
	473	dest2[i] = data2[i];
	474
	475	/* re-enable interrupts if necessary */
	476	if (flag)
	477	enable_interrupts ();
	478
	479	/* data polling for D7 */
	480	start = get_timer (0);
	481	while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
	482	(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
	483
6d0f6bcf	484	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
db01a2ea WD	485	return (1);
	486	}
	487	}
	488	}
	489
	490	return (0);
	491	}