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

/*
 * (C) Copyright 2001
 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
 *
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 2003 (c) MontaVista Software, Inc.
 *
 * 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>

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

/* Board support for 1 or 2 flash devices */
#define FLASH_PORT_WIDTH32
#undef FLASH_PORT_WIDTH16

#ifdef FLASH_PORT_WIDTH16
#define FLASH_PORT_WIDTH		ushort
#define FLASH_PORT_WIDTHV		vu_short
#define SWAP(x)				__swab16(x)
#else
#define FLASH_PORT_WIDTH		ulong
#define FLASH_PORT_WIDTHV		vu_long
#define SWAP(x)				__swab32(x)
#endif

#define FPW				FLASH_PORT_WIDTH
#define FPWV				FLASH_PORT_WIDTHV

#define mb() __asm__ __volatile__ ("" : : : "memory")

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size(FPW * addr, flash_info_t * info);
static int write_data(flash_info_t * info, ulong dest, FPW data);
static void flash_get_offsets(ulong base, flash_info_t * info);
void inline spin_wheel(void);

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

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

	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
		switch (i) {
		case 0:
			flash_get_size((FPW *) PHYS_FLASH_1, &flash_info[i]);
			flash_get_offsets(PHYS_FLASH_1, &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,
		      CONFIG_SYS_FLASH_BASE,
		      CONFIG_SYS_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_INTEL) {
		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_INTEL:
		printf("INTEL ");
		break;
	default:
		printf("Unknown Vendor ");
		break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F128J3A:
		printf("28F128J3A\n");
		break;
	case FLASH_28F640J5:
		printf("28F640J5\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(FPW * addr, flash_info_t * info)
{
	volatile FPW value;
	/* Write auto select command: read Manufacturer ID */
	addr[0x5555] = (FPW) 0x00AA00AA;
	addr[0x2AAA] = (FPW) 0x00550055;
	addr[0x5555] = (FPW) 0x00900090;

	mb();
	value = addr[0];

	switch (value) {

	case (FPW) INTEL_MANUFACT:
		info->flash_id = FLASH_MAN_INTEL;
		break;

	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
		return (0);	/* no or unknown flash  */
	}

	mb();
	value = addr[1];	/* device ID            */
	switch (value) {
	case (FPW) INTEL_ID_28F128J3A:
		info->flash_id += FLASH_28F128J3A;
		info->sector_count = 128;
		info->size = 0x02000000;
		break;		/* => 16 MB     */
	case (FPW) INTEL_ID_28F640J5:
		info->flash_id += FLASH_28F640J5;
		info->sector_count = 64;
		info->size = 0x01000000;
		break;		/* => 16 MB     */

	default:
		info->flash_id = FLASH_UNKNOWN;
		break;
	}

	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
		printf("** ERROR: sector count %d > max (%d) **\n",
		       info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
		info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
	}

	addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */

	return (info->size);
}

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

int
flash_erase(flash_info_t * info, int s_first, int s_last)
{
	int flag, prot, sect;
	ulong type, start;
	int rcode = 0;

	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;
	}

	type = (info->flash_id & FLASH_VENDMASK);
	if ((type != FLASH_MAN_INTEL)) {
		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");
	}

	/* 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 */
			FPWV *addr = (FPWV *) (info->start[sect]);
			FPW status;

			printf("Erasing sector %2d ... ", sect);

			/* arm simple, non interrupt dependent timer */
			start = get_timer(0);

			*addr = (FPW) 0x00500050;	/* clear status register */
			*addr = (FPW) 0x00200020;	/* erase setup */
			*addr = (FPW) 0x00D000D0;	/* erase confirm */

			while (((status =
				 *addr) & (FPW) 0x00800080) !=
			       (FPW) 0x00800080) {
				if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
					printf("Timeout\n");
					*addr = (FPW) 0x00B000B0;	/* suspend erase         */
					*addr = (FPW) 0x00FF00FF;	/* reset to read mode */
					rcode = 1;
					break;
				}
			}

			*addr = (FPW) 0x00500050;	/* clear status register cmd.   */
			*addr = (FPW) 0x00FF00FF;	/* resest to read mode          */

			printf(" done\n");
		}
	}
	return rcode;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 * 4 - Flash not identified
 */

int
write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
	ulong cp, wp;
	FPW data;
	int count, i, l, rc, port_width;

	if (info->flash_id == FLASH_UNKNOWN) {
		return 4;
	}
/* get lower word aligned address */
#ifdef FLASH_PORT_WIDTH16
	wp = (addr & ~1);
	port_width = 2;
#else
	wp = (addr & ~3);
	port_width = 4;
#endif

	/*
	 * 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 < port_width && cnt > 0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt == 0 && i < port_width; ++i, ++cp) {
			data = (data << 8) | (*(uchar *) cp);
		}

		if ((rc = write_data(info, wp, SWAP(data))) != 0) {
			return (rc);
		}
		wp += port_width;
	}

	/*
	 * handle word aligned part
	 */
	count = 0;
	while (cnt >= port_width) {
		data = 0;
		for (i = 0; i < port_width; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_data(info, wp, SWAP(data))) != 0) {
			return (rc);
		}
		wp += port_width;
		cnt -= port_width;
		if (count++ > 0x800) {
			spin_wheel();
			count = 0;
		}
	}

	if (cnt == 0) {
		return (0);
	}

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i < port_width; ++i, ++cp) {
		data = (data << 8) | (*(uchar *) cp);
	}

	return (write_data(info, wp, SWAP(data)));
}

/*-----------------------------------------------------------------------
 * Write a word or halfword to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int
write_data(flash_info_t * info, ulong dest, FPW data)
{
	FPWV *addr = (FPWV *) dest;
	ulong status;
	int flag;
	ulong start;

	/* Check if Flash is (sufficiently) erased */
	if ((*addr & data) != data) {
		printf("not erased at %08lX (%lX)\n", (ulong) addr, *addr);
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	*addr = (FPW) 0x00400040;	/* write setup */
	*addr = data;

	/* arm simple, non interrupt dependent timer */
	start = get_timer(0);

	/* wait while polling the status register */
	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			*addr = (FPW) 0x00FF00FF;	/* restore read mode */
			return (1);
		}
	}

	*addr = (FPW) 0x00FF00FF;	/* restore read mode */

	return (0);
}

void inline
spin_wheel(void)
{
	static int p = 0;
	static char w[] = "\\/-";

	printf("\010%c", w[p]);
	(++p == 3) ? (p = 0) : 0;
}
Commit	Line	Data
855a496f WD	1	/*
	2	* (C) Copyright 2001
	3	* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
	4	*
	5	* (C) Copyright 2001
	6	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	7	*
	8	* 2003 (c) MontaVista Software, Inc.
	9	*
	10	* See file CREDITS for list of people who contributed to this
	11	* project.
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License as
	15	* published by the Free Software Foundation; either version 2 of
	16	* the License, or (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	26	* MA 02111-1307 USA
	27	*/
	28
	29	#include <common.h>
	30	#include <linux/byteorder/swab.h>
	31
6d0f6bcf	32	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
855a496f WD	33
	34	/* Board support for 1 or 2 flash devices */
	35	#define FLASH_PORT_WIDTH32
	36	#undef FLASH_PORT_WIDTH16
	37
	38	#ifdef FLASH_PORT_WIDTH16
	39	#define FLASH_PORT_WIDTH ushort
	40	#define FLASH_PORT_WIDTHV vu_short
	41	#define SWAP(x) __swab16(x)
	42	#else
	43	#define FLASH_PORT_WIDTH ulong
	44	#define FLASH_PORT_WIDTHV vu_long
	45	#define SWAP(x) __swab32(x)
	46	#endif
	47
	48	#define FPW FLASH_PORT_WIDTH
	49	#define FPWV FLASH_PORT_WIDTHV
	50
	51	#define mb() __asm__ __volatile__ ("" : : : "memory")
	52
	53	/*-----------------------------------------------------------------------
	54	* Functions
	55	*/
	56	static ulong flash_get_size(FPW * addr, flash_info_t * info);
	57	static int write_data(flash_info_t * info, ulong dest, FPW data);
	58	static void flash_get_offsets(ulong base, flash_info_t * info);
	59	void inline spin_wheel(void);
	60
	61	/*-----------------------------------------------------------------------
	62	*/
	63
	64	unsigned long
	65	flash_init(void)
	66	{
	67	int i;
	68	ulong size = 0;
	69
6d0f6bcf	70	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
855a496f WD	71	switch (i) {
	72	case 0:
	73	flash_get_size((FPW *) PHYS_FLASH_1, &flash_info[i]);
	74	flash_get_offsets(PHYS_FLASH_1, &flash_info[i]);
	75	break;
	76	default:
	77	panic("configured too many flash banks!\n");
	78	break;
	79	}
	80	size += flash_info[i].size;
	81	}
	82
	83	/* Protect monitor and environment sectors
	84	*/
	85	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	86	CONFIG_SYS_FLASH_BASE,
6d0f6bcf JCPV	87	CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
855a496f WD	88
855a496f WD	89	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	90	CONFIG_ENV_ADDR,
0e8d1586 JCPV	91	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
855a496f WD	92
	93	return size;
	94	}
	95
	96	/*-----------------------------------------------------------------------
	97	*/
	98	static void
	99	flash_get_offsets(ulong base, flash_info_t * info)
	100	{
	101	int i;
	102
	103	if (info->flash_id == FLASH_UNKNOWN) {
	104	return;
	105	}
	106
	107	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
	108	for (i = 0; i < info->sector_count; i++) {
	109	info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
	110	info->protect[i] = 0;
	111	}
	112	}
	113	}
	114
	115	/*-----------------------------------------------------------------------
	116	*/
	117	void
	118	flash_print_info(flash_info_t * info)
	119	{
	120	int i;
	121
	122	if (info->flash_id == FLASH_UNKNOWN) {
	123	printf("missing or unknown FLASH type\n");
	124	return;
	125	}
	126
	127	switch (info->flash_id & FLASH_VENDMASK) {
	128	case FLASH_MAN_INTEL:
	129	printf("INTEL ");
	130	break;
	131	default:
	132	printf("Unknown Vendor ");
	133	break;
	134	}
	135
	136	switch (info->flash_id & FLASH_TYPEMASK) {
	137	case FLASH_28F128J3A:
	138	printf("28F128J3A\n");
	139	break;
	140	case FLASH_28F640J5:
	141	printf("28F640J5\n");
	142	break;
	143	default:
	144	printf("Unknown Chip Type\n");
	145	break;
	146	}
	147
	148	printf(" Size: %ld MB in %d Sectors\n",
	149	info->size >> 20, info->sector_count);
	150
	151	printf(" Sector Start Addresses:");
	152	for (i = 0; i < info->sector_count; ++i) {
	153	if ((i % 5) == 0)
	154	printf("\n ");
	155	printf(" %08lX%s",
156	info->start[i], info->protect[i] ? " (RO)" : " ");
157	}
158	printf("\n");
159	return;
160	}
161
162	/*
163	* The following code cannot be run from FLASH!
164	*/
165	static ulong
166	flash_get_size(FPW * addr, flash_info_t * info)
167	{
168	volatile FPW value;
169	/* Write auto select command: read Manufacturer ID */
170	addr[0x5555] = (FPW) 0x00AA00AA;
171	addr[0x2AAA] = (FPW) 0x00550055;
172	addr[0x5555] = (FPW) 0x00900090;
173
174	mb();
175	value = addr[0];
176
177	switch (value) {
178
179	case (FPW) INTEL_MANUFACT:
180	info->flash_id = FLASH_MAN_INTEL;
181	break;
182
183	default:
184	info->flash_id = FLASH_UNKNOWN;
185	info->sector_count = 0;
186	info->size = 0;
187	addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
188	return (0); /* no or unknown flash */
189	}
190
191	mb();
192	value = addr[1]; /* device ID */
193	switch (value) {
194	case (FPW) INTEL_ID_28F128J3A:
195	info->flash_id += FLASH_28F128J3A;
196	info->sector_count = 128;
197	info->size = 0x02000000;
198	break; /* => 16 MB */
199	case (FPW) INTEL_ID_28F640J5:
200	info->flash_id += FLASH_28F640J5;
201	info->sector_count = 64;
202	info->size = 0x01000000;
203	break; /* => 16 MB */
204
205	default:
206	info->flash_id = FLASH_UNKNOWN;
207	break;
208	}
209
6d0f6bcf	210	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
855a496f	211	printf(" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	212	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	213	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
855a496f WD	214	}
	215
	216	addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
	217
	218	return (info->size);
	219	}
	220
	221	/*-----------------------------------------------------------------------
	222	*/
	223
	224	int
	225	flash_erase(flash_info_t * info, int s_first, int s_last)
	226	{
	227	int flag, prot, sect;
a60d1e5b	228	ulong type, start;
855a496f WD	229	int rcode = 0;
	230
	231	if ((s_first < 0) \|\| (s_first > s_last)) {
	232	if (info->flash_id == FLASH_UNKNOWN) {
	233	printf("- missing\n");
	234	} else {
	235	printf("- no sectors to erase\n");
	236	}
	237	return 1;
	238	}
	239
	240	type = (info->flash_id & FLASH_VENDMASK);
	241	if ((type != FLASH_MAN_INTEL)) {
	242	printf("Can't erase unknown flash type %08lx - aborted\n",
	243	info->flash_id);
	244	return 1;
	245	}
	246
	247	prot = 0;
	248	for (sect = s_first; sect <= s_last; ++sect) {
	249	if (info->protect[sect]) {
	250	prot++;
	251	}
	252	}
	253
	254	if (prot) {
	255	printf("- Warning: %d protected sectors will not be erased!\n",
	256	prot);
	257	} else {
	258	printf("\n");
	259	}
	260
855a496f WD	261	/* Disable interrupts which might cause a timeout here */
	262	flag = disable_interrupts();
	263
	264	/* Start erase on unprotected sectors */
	265	for (sect = s_first; sect <= s_last; sect++) {
	266	if (info->protect[sect] == 0) { /* not protected */
	267	FPWV addr = (FPWV ) (info->start[sect]);
	268	FPW status;
	269
	270	printf("Erasing sector %2d ... ", sect);
	271
	272	/* arm simple, non interrupt dependent timer */
a60d1e5b	273	start = get_timer(0);
855a496f WD	274
	275	addr = (FPW) 0x00500050; / clear status register */
	276	addr = (FPW) 0x00200020; / erase setup */
	277	addr = (FPW) 0x00D000D0; / erase confirm */
	278
	279	while (((status =
	280	*addr) & (FPW) 0x00800080) !=
	281	(FPW) 0x00800080) {
a60d1e5b	282	if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
855a496f WD	283	printf("Timeout\n");
	284	addr = (FPW) 0x00B000B0; / suspend erase */
	285	addr = (FPW) 0x00FF00FF; / reset to read mode */
	286	rcode = 1;
	287	break;
	288	}
	289	}
	290
	291	addr = (FPW) 0x00500050; / clear status register cmd. */
	292	addr = (FPW) 0x00FF00FF; / resest to read mode */
	293
	294	printf(" done\n");
	295	}
	296	}
	297	return rcode;
	298	}
	299
	300	/*-----------------------------------------------------------------------
	301	* Copy memory to flash, returns:
	302	* 0 - OK
	303	* 1 - write timeout
	304	* 2 - Flash not erased
	305	* 4 - Flash not identified
	306	*/
	307
	308	int
	309	write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	310	{
	311	ulong cp, wp;
	312	FPW data;
	313	int count, i, l, rc, port_width;
	314
	315	if (info->flash_id == FLASH_UNKNOWN) {
	316	return 4;
	317	}
	318	/* get lower word aligned address */
	319	#ifdef FLASH_PORT_WIDTH16
	320	wp = (addr & ~1);
	321	port_width = 2;
	322	#else
	323	wp = (addr & ~3);
	324	port_width = 4;
	325	#endif
	326
	327	/*
	328	* handle unaligned start bytes
	329	*/
	330	if ((l = addr - wp) != 0) {
	331	data = 0;
	332	for (i = 0, cp = wp; i < l; ++i, ++cp) {
	333	data = (data << 8) \| ((uchar ) cp);
	334	}
	335	for (; i < port_width && cnt > 0; ++i) {
	336	data = (data << 8) \| *src++;
	337	--cnt;
	338	++cp;
	339	}
	340	for (; cnt == 0 && i < port_width; ++i, ++cp) {
	341	data = (data << 8) \| ((uchar ) cp);
	342	}
	343
	344	if ((rc = write_data(info, wp, SWAP(data))) != 0) {
	345	return (rc);
	346	}
347	wp += port_width;
348	}
349
350	/*
351	* handle word aligned part
352	*/
353	count = 0;
354	while (cnt >= port_width) {
355	data = 0;
356	for (i = 0; i < port_width; ++i) {
357	data = (data << 8) \| *src++;
358	}
359	if ((rc = write_data(info, wp, SWAP(data))) != 0) {
360	return (rc);
361	}
362	wp += port_width;
363	cnt -= port_width;
364	if (count++ > 0x800) {
365	spin_wheel();
366	count = 0;
367	}
368	}
369
370	if (cnt == 0) {
371	return (0);
372	}
373
374	/*
375	* handle unaligned tail bytes
376	*/
377	data = 0;
378	for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
379	data = (data << 8) \| *src++;
380	--cnt;
381	}
382	for (; i < port_width; ++i, ++cp) {
383	data = (data << 8) \| ((uchar ) cp);
384	}
385
386	return (write_data(info, wp, SWAP(data)));
387	}
388
389	/*-----------------------------------------------------------------------
390	* Write a word or halfword to Flash, returns:
391	* 0 - OK
392	* 1 - write timeout
393	* 2 - Flash not erased
394	*/
395	static int
396	write_data(flash_info_t * info, ulong dest, FPW data)
397	{
398	FPWV addr = (FPWV ) dest;
399	ulong status;
400	int flag;
a60d1e5b	401	ulong start;
855a496f WD	402
	403	/* Check if Flash is (sufficiently) erased */
	404	if ((*addr & data) != data) {
42dfe7a1	405	printf("not erased at %08lX (%lX)\n", (ulong) addr, *addr);
855a496f WD	406	return (2);
	407	}
	408	/* Disable interrupts which might cause a timeout here */
	409	flag = disable_interrupts();
	410
	411	addr = (FPW) 0x00400040; / write setup */
	412	*addr = data;
	413
	414	/* arm simple, non interrupt dependent timer */
a60d1e5b	415	start = get_timer(0);
855a496f WD	416
	417	/* wait while polling the status register */
	418	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
a60d1e5b	419	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
855a496f WD	420	addr = (FPW) 0x00FF00FF; / restore read mode */
	421	return (1);
	422	}
	423	}
	424
	425	addr = (FPW) 0x00FF00FF; / restore read mode */
	426
	427	return (0);
	428	}
	429
	430	void inline
	431	spin_wheel(void)
	432	{
	433	static int p = 0;
	434	static char w[] = "\\/-";
	435
	436	printf("\010%c", w[p]);
	437	(++p == 3) ? (p = 0) : 0;
	438	}