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

/*
 * (C) Copyright 2002
 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
 *
 * (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
 */

#include <common.h>
#include <linux/byteorder/swab.h>

#define SWAP(x)               __swab32(x)

flash_info_t	flash_info[CFG_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);

/*-----------------------------------------------------------------------
 */
unsigned long flash_init (void)
{
	int i;
	ulong size = 0;

	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
		switch (i) {
		case 0:
			flash_get_size ((vu_long *) PHYS_FLASH_1, &flash_info[i]);
			flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
			break;
		case 1:
			flash_get_size ((vu_long *) PHYS_FLASH_2, &flash_info[i]);
			flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
			break;
		default:
			panic ("configured too many flash banks!\n");
			break;
		}
		size += flash_info[i].size;
	}

	/* Protect monitor and environment sectors */
	flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
	flash_protect ( FLAG_PROTECT_SET,CONFIG_ENV_ADDR,CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );

	return size;
}

/*-----------------------------------------------------------------------
 */
static void flash_get_offsets (ulong base, flash_info_t *info)
{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) return;

	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
		for (i = 0; i < info->sector_count; i++) {
			info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
			info->protect[i] = 0;
		}
	}
}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:	printf ("AMD ");		break;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AMLV640U:	printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
				break;
	case FLASH_S29GL064M:	printf ("S29GL064M (64Mbit, top boot 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) {
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			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;
	ulong value;
	ulong base = (ulong)addr;

	/* Write auto select command: read Manufacturer ID */
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00900090;

	value = addr[0];

	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);

	switch (value) {
	case AMD_MANUFACT:
		debug ("Manufacturer: AMD\n");
		info->flash_id = FLASH_MAN_AMD;
		break;
	case FUJ_MANUFACT:
		debug ("Manufacturer: FUJITSU\n");
		info->flash_id = FLASH_MAN_FUJ;
		break;
	default:
		debug ("Manufacturer: *** unknown ***\n");
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

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

	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);

	switch (value) {

	case AMD_ID_MIRROR:
		debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
			addr[14], addr[15]);
		switch(addr[14]) {
		case AMD_ID_LV640U_2:
			if (addr[15] != AMD_ID_LV640U_3) {
				debug ("Chip: AMLV640U -> unknown\n");
				info->flash_id = FLASH_UNKNOWN;
			} else {
				debug ("Chip: AMLV640U\n");
				info->flash_id += FLASH_AMLV640U;
				info->sector_count = 128;
				info->size = 0x01000000;
			}
			break;				/* => 16 MB	*/
		case AMD_ID_GL064MT_2:
			if (addr[15] != AMD_ID_GL064MT_3) {
				debug ("Chip: S29GL064M-R3 -> unknown\n");
				info->flash_id = FLASH_UNKNOWN;
			} else {
				debug ("Chip: S29GL064M-R3\n");
				info->flash_id += FLASH_S29GL064M;
				info->sector_count = 128;
				info->size = 0x01000000;
			}
			break;				/* => 16 MB	*/
		default:
			debug ("Chip: *** unknown ***\n");
			info->flash_id = FLASH_UNKNOWN;
			break;
		}
		break;

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

	/* set up sector start address table */
	switch (value) {
	case AMD_ID_MIRROR:
		switch (info->flash_id & FLASH_TYPEMASK) {
		/* only known types here - no default */
		case FLASH_AMLV128U:
		case FLASH_AMLV640U:
		case FLASH_AMLV320U:
			for (i = 0; i < info->sector_count; i++) {
				info->start[i] = base;
				base += 0x20000;
			}
			break;
		case FLASH_AMLV320B:
			for (i = 0; i < info->sector_count; i++) {
				info->start[i] = base;
				/*
				 * The first 8 sectors are 8 kB,
				 * all the other ones  are 64 kB
				 */
				base += (i < 8)
					?  2 * ( 8 << 10)
					:  2 * (64 << 10);
			}
			break;
		}
		break;

	default:
		return (0);
		break;
	}

#if 0
	/* 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 */
		addr = (volatile unsigned long *)(info->start[i]);
		info->protect[i] = addr[2] & 1;
	}
#endif

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr = (volatile unsigned long *)info->start[0];

		*addr = 0x00F000F0;	/* reset bank */
	}

	return (info->size);
}


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

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

	debug ("flash_erase: first: %d last: %d\n", s_first, s_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) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		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();

	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00800080;
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long*)(info->start[sect]);
			addr[0] = 0x00300030;
			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 = (vu_long*)(info->start[l_sect]);
	while ((addr[0] & 0x00800080) != 0x00800080) {
		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 100000) {	/* every second */
			putc ('.');
			last = now;
		}
	}

DONE:
	/* reset to read mode */
	addr = (volatile unsigned long *)info->start[0];
	addr[0] = 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, SWAP(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, SWAP(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, SWAP(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)
{
	vu_long *addr = (vu_long*)(info->start[0]);
	ulong start;
	int flag;

	/* 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();

	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;

	*((vu_long *)dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);
	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
ca0e7748 WD	1	/*
	2	* (C) Copyright 2002
	3	* Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
	4	*
	5	* (C) Copyright 2000-2004
	6	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	7	*
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of
	14	* the License, or (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	* MA 02111-1307 USA
	25	*/
	26
	27	#include <common.h>
	28	#include <linux/byteorder/swab.h>
	29
ca0e7748 WD	30	#define SWAP(x) __swab32(x)
	31
	32	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	33
	34	/* Functions */
	35	static ulong flash_get_size (vu_long addr, flash_info_t info);
	36	static int write_word (flash_info_t *info, ulong dest, ulong data);
	37	static void flash_get_offsets (ulong base, flash_info_t *info);
	38
ca0e7748 WD	39	/*-----------------------------------------------------------------------
	40	*/
	41	unsigned long flash_init (void)
	42	{
	43	int i;
	44	ulong size = 0;
	45
	46	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
	47	switch (i) {
	48	case 0:
e78220f6	49	flash_get_size ((vu_long *) PHYS_FLASH_1, &flash_info[i]);
ca0e7748 WD	50	flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
	51	break;
	52	case 1:
e78220f6	53	flash_get_size ((vu_long *) PHYS_FLASH_2, &flash_info[i]);
ca0e7748 WD	54	flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
	55	break;
	56	default:
	57	panic ("configured too many flash banks!\n");
	58	break;
	59	}
	60	size += flash_info[i].size;
	61	}
	62
	63	/* Protect monitor and environment sectors */
	64	flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
0e8d1586	65	flash_protect ( FLAG_PROTECT_SET,CONFIG_ENV_ADDR,CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
ca0e7748 WD	66
	67	return size;
	68	}
	69
	70	/*-----------------------------------------------------------------------
	71	*/
	72	static void flash_get_offsets (ulong base, flash_info_t *info)
	73	{
	74	int i;
	75
	76	if (info->flash_id == FLASH_UNKNOWN) return;
	77
	78	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
	79	for (i = 0; i < info->sector_count; i++) {
	80	info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
	81	info->protect[i] = 0;
	82	}
	83	}
	84	}
	85
	86	/*-----------------------------------------------------------------------
	87	*/
	88	void flash_print_info (flash_info_t *info)
	89	{
	90	int i;
	91
	92	if (info->flash_id == FLASH_UNKNOWN) {
	93	printf ("missing or unknown FLASH type\n");
	94	return;
	95	}
	96
	97	switch (info->flash_id & FLASH_VENDMASK) {
	98	case FLASH_MAN_AMD: printf ("AMD "); break;
	99	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	100	default: printf ("Unknown Vendor "); break;
	101	}
	102
	103	switch (info->flash_id & FLASH_TYPEMASK) {
ca0e7748 WD	104	case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
ca0e7748 WD	105	break;
45237bc0	106	case FLASH_S29GL064M: printf ("S29GL064M (64Mbit, top boot sector size)\n");
ca0e7748 WD	107	break;
	108	default: printf ("Unknown Chip Type\n");
	109	break;
	110	}
	111
	112	printf (" Size: %ld MB in %d Sectors\n",
	113	info->size >> 20, info->sector_count);
	114
	115	printf (" Sector Start Addresses:");
	116	for (i=0; i<info->sector_count; ++i) {
	117	if ((i % 5) == 0)
	118	printf ("\n ");
	119	printf (" %08lX%s",
	120	info->start[i],
	121	info->protect[i] ? " (RO)" : " "
	122	);
	123	}
	124	printf ("\n");
	125	return;
	126	}
	127
	128	/*
	129	* The following code cannot be run from FLASH!
	130	*/
	131	static ulong flash_get_size (vu_long addr, flash_info_t info)
	132	{
	133	short i;
	134	ulong value;
	135	ulong base = (ulong)addr;
	136
	137	/* Write auto select command: read Manufacturer ID */
	138	addr[0x0555] = 0x00AA00AA;
	139	addr[0x02AA] = 0x00550055;
	140	addr[0x0555] = 0x00900090;
	141
	142	value = addr[0];
	143
	144	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
	145
	146	switch (value) {
	147	case AMD_MANUFACT:
	148	debug ("Manufacturer: AMD\n");
	149	info->flash_id = FLASH_MAN_AMD;
	150	break;
	151	case FUJ_MANUFACT:
	152	debug ("Manufacturer: FUJITSU\n");
	153	info->flash_id = FLASH_MAN_FUJ;
	154	break;
	155	default:
	156	debug ("Manufacturer: * unknown *\n");
	157	info->flash_id = FLASH_UNKNOWN;
	158	info->sector_count = 0;
	159	info->size = 0;
	160	return (0); /* no or unknown flash */
	161	}
	162
	163	value = addr[1]; /* device ID */
	164
	165	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
	166
	167	switch (value) {
	168
	169	case AMD_ID_MIRROR:
	170	debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
171	addr[14], addr[15]);
172	switch(addr[14]) {
ca0e7748 WD	173	case AMD_ID_LV640U_2:
	174	if (addr[15] != AMD_ID_LV640U_3) {
	175	debug ("Chip: AMLV640U -> unknown\n");
	176	info->flash_id = FLASH_UNKNOWN;
	177	} else {
	178	debug ("Chip: AMLV640U\n");
	179	info->flash_id += FLASH_AMLV640U;
	180	info->sector_count = 128;
	181	info->size = 0x01000000;
	182	}
	183	break; /* => 16 MB */
45237bc0 WD	184	case AMD_ID_GL064MT_2:
	185	if (addr[15] != AMD_ID_GL064MT_3) {
	186	debug ("Chip: S29GL064M-R3 -> unknown\n");
ca0e7748 WD	187	info->flash_id = FLASH_UNKNOWN;
ca0e7748 WD	188	} else {
45237bc0 WD	189	debug ("Chip: S29GL064M-R3\n");
	190	info->flash_id += FLASH_S29GL064M;
	191	info->sector_count = 128;
	192	info->size = 0x01000000;
ca0e7748	193	}
45237bc0	194	break; /* => 16 MB */
ca0e7748 WD	195	default:
	196	debug ("Chip: * unknown *\n");
	197	info->flash_id = FLASH_UNKNOWN;
	198	break;
	199	}
	200	break;
	201
	202	default:
	203	info->flash_id = FLASH_UNKNOWN;
	204	return (0); /* => no or unknown flash */
	205	}
	206
	207	/* set up sector start address table */
	208	switch (value) {
	209	case AMD_ID_MIRROR:
	210	switch (info->flash_id & FLASH_TYPEMASK) {
	211	/* only known types here - no default */
	212	case FLASH_AMLV128U:
	213	case FLASH_AMLV640U:
	214	case FLASH_AMLV320U:
	215	for (i = 0; i < info->sector_count; i++) {
	216	info->start[i] = base;
	217	base += 0x20000;
	218	}
	219	break;
	220	case FLASH_AMLV320B:
	221	for (i = 0; i < info->sector_count; i++) {
	222	info->start[i] = base;
	223	/*
	224	* The first 8 sectors are 8 kB,
	225	* all the other ones are 64 kB
	226	*/
	227	base += (i < 8)
	228	? 2 * ( 8 << 10)
	229	: 2 * (64 << 10);
	230	}
	231	break;
	232	}
	233	break;
	234
	235	default:
	236	return (0);
	237	break;
	238	}
	239
	240	#if 0
	241	/* check for protected sectors */
	242	for (i = 0; i < info->sector_count; i++) {
	243	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	244	/* D0 = 1 if protected */
	245	addr = (volatile unsigned long *)(info->start[i]);
	246	info->protect[i] = addr[2] & 1;
	247	}
	248	#endif
	249
	250	/*
	251	* Prevent writes to uninitialized FLASH.
	252	*/
	253	if (info->flash_id != FLASH_UNKNOWN) {
	254	addr = (volatile unsigned long *)info->start[0];
	255
	256	addr = 0x00F000F0; / reset bank */
	257	}
	258
259	return (info->size);
260	}
261
262
263	/*-----------------------------------------------------------------------
264	*/
265
266	int flash_erase (flash_info_t *info, int s_first, int s_last)
267	{
268	vu_long addr = (vu_long)(info->start[0]);
269	int flag, prot, sect, l_sect;
270	ulong start, now, last;
271
272	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
273
274	if ((s_first < 0) \|\| (s_first > s_last)) {
275	if (info->flash_id == FLASH_UNKNOWN) {
276	printf ("- missing\n");
277	} else {
278	printf ("- no sectors to erase\n");
279	}
280	return 1;
281	}
282
283	if ((info->flash_id == FLASH_UNKNOWN) \|\|
284	(info->flash_id > FLASH_AMD_COMP)) {
285	printf ("Can't erase unknown flash type %08lx - aborted\n",
286	info->flash_id);
287	return 1;
288	}
289
290	prot = 0;
291	for (sect=s_first; sect<=s_last; ++sect) {
292	if (info->protect[sect]) {
293	prot++;
294	}
295	}
296
297	if (prot) {
298	printf ("- Warning: %d protected sectors will not be erased!\n",
299	prot);
300	} else {
301	printf ("\n");
302	}
303
304	l_sect = -1;
305
306	/* Disable interrupts which might cause a timeout here */
307	flag = disable_interrupts();
308
309	addr[0x0555] = 0x00AA00AA;
310	addr[0x02AA] = 0x00550055;
311	addr[0x0555] = 0x00800080;
312	addr[0x0555] = 0x00AA00AA;
313	addr[0x02AA] = 0x00550055;
314
315	/* Start erase on unprotected sectors */
316	for (sect = s_first; sect<=s_last; sect++) {
317	if (info->protect[sect] == 0) { /* not protected */
318	addr = (vu_long*)(info->start[sect]);
319	addr[0] = 0x00300030;
320	l_sect = sect;
321	}
322	}
323
324	/* re-enable interrupts if necessary */
325	if (flag)
326	enable_interrupts();
327
328	/* wait at least 80us - let's wait 1 ms */
329	udelay (1000);
330
331	/*
332	* We wait for the last triggered sector
333	*/
334	if (l_sect < 0)
335	goto DONE;
336
337	start = get_timer (0);
338	last = start;
339	addr = (vu_long*)(info->start[l_sect]);
340	while ((addr[0] & 0x00800080) != 0x00800080) {
341	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
342	printf ("Timeout\n");
343	return 1;
344	}
345	/* show that we're waiting */
346	if ((now - last) > 100000) { /* every second */
347	putc ('.');
348	last = now;
349	}
350	}
351
352	DONE:
353	/* reset to read mode */
354	addr = (volatile unsigned long *)info->start[0];
355	addr[0] = 0x00F000F0; /* reset bank */
356
357	printf (" done\n");
358	return 0;
359	}
360
361	/*-----------------------------------------------------------------------
362	* Copy memory to flash, returns:
363	* 0 - OK
364	* 1 - write timeout
365	* 2 - Flash not erased
366	*/
367
368	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
369	{
370	ulong cp, wp, data;
371	int i, l, rc;
372
373	wp = (addr & ~3); /* get lower word aligned address */
374
375	/*
376	* handle unaligned start bytes
377	*/
378	if ((l = addr - wp) != 0) {
379	data = 0;
380	for (i=0, cp=wp; i<l; ++i, ++cp) {
381	data = (data << 8) \| ((uchar )cp);
382	}
383	for (; i<4 && cnt>0; ++i) {
384	data = (data << 8) \| *src++;
385	--cnt;
386	++cp;
387	}
388	for (; cnt==0 && i<4; ++i, ++cp) {
389	data = (data << 8) \| ((uchar )cp);
390	}
391
392	if ((rc = write_word(info, wp, SWAP(data))) != 0) {
393	return (rc);
394	}
395	wp += 4;
396	}
397
398	/*
399	* handle word aligned part
400	*/
401	while (cnt >= 4) {
402	data = 0;
403	for (i=0; i<4; ++i) {
404	data = (data << 8) \| *src++;
405	}
406	if ((rc = write_word(info, wp, SWAP(data))) != 0) {
407	return (rc);
408	}
409	wp += 4;
410	cnt -= 4;
411	}
412
413	if (cnt == 0) {
414	return (0);
415	}
416
417	/*
418	* handle unaligned tail bytes
419	*/
420	data = 0;
421	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
422	data = (data << 8) \| *src++;
423	--cnt;
424	}
425	for (; i<4; ++i, ++cp) {
426	data = (data << 8) \| ((uchar )cp);
427	}
428
429	return (write_word(info, wp, SWAP(data)));
430	}
431
432	/*-----------------------------------------------------------------------
433	* Write a word to Flash, returns:
434	* 0 - OK
435	* 1 - write timeout
436	* 2 - Flash not erased
437	*/
438	static int write_word (flash_info_t *info, ulong dest, ulong data)
439	{
440	vu_long addr = (vu_long)(info->start[0]);
441	ulong start;
ca0e7748	442	int flag;
ca0e7748 WD	443
	444	/* Check if Flash is (sufficiently) erased */
	445	if ((((vu_long )dest) & data) != data) {
	446	return (2);
	447	}
	448
	449	/* Disable interrupts which might cause a timeout here */
	450	flag = disable_interrupts();
	451
	452	addr[0x0555] = 0x00AA00AA;
	453	addr[0x02AA] = 0x00550055;
	454	addr[0x0555] = 0x00A000A0;
	455
	456	((vu_long )dest) = data;
	457
	458	/* re-enable interrupts if necessary */
	459	if (flag)
	460	enable_interrupts();
	461
	462	/* data polling for D7 */
	463	start = get_timer (0);
	464	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
	465	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
	466	return (1);
	467	}
	468	}
	469	return (0);
	470	}