[people/ms/u-boot.git] / board / kup4k / flash.c

/*
 * (C) Copyright 2000-2002
 * 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 <mpc8xx.h>

#ifndef	CFG_ENV_ADDR
#define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
#endif

#define CONFIG_FLASH_16BIT

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);

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

unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0;
	int i;

	/* Init: no FLASHes known */
	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].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);
	}


	/* Remap FLASH according to real size */
	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16;

	/* Re-do sizing to get full correct info */
	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CFG_MONITOR_BASE,
		      CFG_MONITOR_BASE+monitor_flash_len-1,
		      &flash_info[0]);
#endif

#ifdef	CFG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CFG_ENV_ADDR,
		      CFG_ENV_ADDR+CFG_ENV_SIZE-1,
		      &flash_info[0]);
#endif

	flash_info[0].size = size_b0;

	return (size_b0);
}

/*-----------------------------------------------------------------------
 */
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_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\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 */
	vu_short *s_addr=(vu_short*)addr;
	s_addr[0x5555] = 0x00AA;
	s_addr[0x2AAA] = 0x0055;
	s_addr[0x5555] = 0x0090;

	value = s_addr[0];
	value = value|(value<<16);

	switch (value) {
	case FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

	value = s_addr[1];
	value = value|(value<<16);

		switch (value) {
	case FUJI_ID_29F800BA:
		info->flash_id += FLASH_AM400T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */
	}

	/* set up sector start address table */
	/* set sector offsets for bottom boot block type	*/
	info->start[0] = base + 0x00000000;
	info->start[1] = base + 0x00004000;
	info->start[2] = base + 0x00006000;
	info->start[3] = base + 0x00008000;
	for (i = 4; i < info->sector_count; i++) {
		info->start[i] = base + (i * 0x00010000) - 0x00030000;
	}


	/* 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 */
		s_addr = (volatile unsigned short *)(info->start[i]);
		info->protect[i] = s_addr[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		s_addr = (volatile unsigned short *)info->start[0];
		*s_addr = 0x00F0;	/* 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;
	ulong start, now, last;
#ifdef CONFIG_FLASH_16BIT
	vu_short *s_addr = (vu_short*)addr;
#endif

	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;
	}
/*#ifndef CONFIG_FLASH_16BIT
	ulong type;
	type = (info->flash_id & FLASH_VENDMASK);
	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		return;
	}
#endif*/
	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");
	}

	start = get_timer (0);
	last  = start;
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
#ifdef CONFIG_FLASH_16BIT
			vu_short *s_sect_addr = (vu_short*)(info->start[sect]);
#else
			vu_long	*sect_addr = (vu_long*)(info->start[sect]);
#endif
			/* Disable interrupts which might cause a timeout here */
			flag = disable_interrupts();

#ifdef CONFIG_FLASH_16BIT

			/*printf("\ns_sect_addr=%x",s_sect_addr);*/
			s_addr[0x5555] = 0x00AA;
			s_addr[0x2AAA] = 0x0055;
			s_addr[0x5555] = 0x0080;
			s_addr[0x5555] = 0x00AA;
			s_addr[0x2AAA] = 0x0055;
			s_sect_addr[0] = 0x0030;
#else
			addr[0x5555] = 0x00AA00AA;
			addr[0x2AAA] = 0x00550055;
			addr[0x5555] = 0x00800080;
			addr[0x5555] = 0x00AA00AA;
			addr[0x2AAA] = 0x00550055;
			sect_addr[0] = 0x00300030;
#endif
			/* re-enable interrupts if necessary */
			if (flag)
				enable_interrupts();

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

#ifdef CONFIG_FLASH_16BIT
			while ((s_sect_addr[0] & 0x0080) != 0x0080) {
#else
			while ((sect_addr[0] & 0x00800080) != 0x00800080) {
#endif
				if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					return 1;
				}
				/* show that we're waiting */
				if ((now - last) > 1000) {	/* every second */
					putc ('.');
					last = now;
				}
			}
		}
	}

	/* reset to read mode */
	addr = (volatile unsigned long *)info->start[0];
#ifdef CONFIG_FLASH_16BIT
	s_addr[0] = 0x00F0;	/* reset bank */
#else
	addr[0] = 0x00F000F0;	/* reset bank */
#endif

	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)
{
	vu_long *addr = (vu_long*)(info->start[0]);

#ifdef CONFIG_FLASH_16BIT
	vu_short high_data;
	vu_short low_data;
	vu_short *s_addr = (vu_short*)addr;
#endif
	ulong start;
	int flag;

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

#ifdef CONFIG_FLASH_16BIT
	/* Write the 16 higher-bits */
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	high_data = ((data>>16) & 0x0000ffff);

	s_addr[0x5555] = 0x00AA;
	s_addr[0x2AAA] = 0x0055;
	s_addr[0x5555] = 0x00A0;

	*((vu_short *)dest) = high_data;


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

	/* data polling for D7 */
	start = get_timer (0);
	while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}


	/* Write the 16 lower-bits */
#endif

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();
#ifdef CONFIG_FLASH_16BIT
	dest += 0x2;
	low_data = (data & 0x0000ffff);

	s_addr[0x5555] = 0x00AA;
	s_addr[0x2AAA] = 0x0055;
	s_addr[0x5555] = 0x00A0;
	*((vu_short *)dest) = low_data;

#else
	addr[0x5555] = 0x00AA00AA;
	addr[0x2AAA] = 0x00550055;
	addr[0x5555] = 0x00A000A0;
	*((vu_long *)dest) = data;
#endif

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

	/* data polling for D7 */
	start = get_timer (0);

#ifdef CONFIG_FLASH_16BIT
	while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {
#else
	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
#endif

		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
56f94be3 WD	1	/*
	2	* (C) Copyright 2000-2002
	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	#include <common.h>
	25	#include <mpc8xx.h>
	26
	27	#ifndef CFG_ENV_ADDR
	28	#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	29	#endif
	30
	31	#define CONFIG_FLASH_16BIT
	32
	33	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	34
	35	/*-----------------------------------------------------------------------
	36	* Functions
	37	*/
	38	static ulong flash_get_size (vu_long addr, flash_info_t info);
	39	static int write_word (flash_info_t *info, ulong dest, ulong data);
	40
	41	/*-----------------------------------------------------------------------
	42	*/
	43
	44	unsigned long flash_init (void)
	45	{
	46	volatile immap_t immap = (immap_t )CFG_IMMR;
	47	volatile memctl8xx_t *memctl = &immap->im_memctl;
	48	unsigned long size_b0;
	49	int i;
	50
	51	/* Init: no FLASHes known */
	52	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	53	flash_info[i].flash_id = FLASH_UNKNOWN;
	54	}
	55
	56	/* Static FLASH Bank configuration here - FIXME XXX */
	57
	58	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
	59
	60	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	61	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	62	size_b0, size_b0<<20);
	63	}
	64
65
66	/* Remap FLASH according to real size */
67	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size_b0 & OR_AM_MSK);
68	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V \| BR_PS_16;
69
70	/* Re-do sizing to get full correct info */
71	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
72
73	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
74	/* monitor protection ON by default */
75	flash_protect(FLAG_PROTECT_SET,
76	CFG_MONITOR_BASE,
3b57fe0a	77	CFG_MONITOR_BASE+monitor_flash_len-1,
56f94be3 WD	78	&flash_info[0]);
	79	#endif
	80
	81	#ifdef CFG_ENV_IS_IN_FLASH
	82	/* ENV protection ON by default */
	83	flash_protect(FLAG_PROTECT_SET,
	84	CFG_ENV_ADDR,
	85	CFG_ENV_ADDR+CFG_ENV_SIZE-1,
	86	&flash_info[0]);
	87	#endif
	88
	89	flash_info[0].size = size_b0;
	90
	91	return (size_b0);
	92	}
	93
	94	/*-----------------------------------------------------------------------
	95	*/
	96	void flash_print_info (flash_info_t *info)
	97	{
	98	int i;
	99
	100	if (info->flash_id == FLASH_UNKNOWN) {
	101	printf ("missing or unknown FLASH type\n");
	102	return;
	103	}
	104
	105	switch (info->flash_id & FLASH_VENDMASK) {
	106	case FLASH_MAN_AMD: printf ("AMD "); break;
	107	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	108	default: printf ("Unknown Vendor "); break;
	109	}
	110
	111	switch (info->flash_id & FLASH_TYPEMASK) {
	112	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	113	break;
	114	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	115	break;
	116	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	117	break;
	118	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	119	break;
	120	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	121	break;
	122	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	123	break;
	124	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	125	break;
	126	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	127	break;
	128	default: printf ("Unknown Chip Type\n");
	129	break;
	130	}
	131
	132	printf (" Size: %ld MB in %d Sectors\n",
	133	info->size >> 20, info->sector_count);
	134
	135	printf (" Sector Start Addresses:");
	136	for (i=0; i<info->sector_count; ++i) {
	137	if ((i % 5) == 0)
	138	printf ("\n ");
	139	printf (" %08lX%s",
	140	info->start[i],
	141	info->protect[i] ? " (RO)" : " "
142	);
143	}
144	printf ("\n");
145	return;
146	}
147
148	/*-----------------------------------------------------------------------
149	*/
150
151
152	/*-----------------------------------------------------------------------
153	*/
154
155	/*
156	* The following code cannot be run from FLASH!
157	*/
158
159	static ulong flash_get_size (vu_long addr, flash_info_t info)
160	{
161	short i;
162	ulong value;
163	ulong base = (ulong)addr;
164
165	/* Write auto select command: read Manufacturer ID */
166	vu_short s_addr=(vu_short)addr;
167	s_addr[0x5555] = 0x00AA;
168	s_addr[0x2AAA] = 0x0055;
169	s_addr[0x5555] = 0x0090;
170
171	value = s_addr[0];
172	value = value\|(value<<16);
173
174	switch (value) {
175	case FUJ_MANUFACT:
176	info->flash_id = FLASH_MAN_FUJ;
177	break;
178	default:
179	info->flash_id = FLASH_UNKNOWN;
180	info->sector_count = 0;
181	info->size = 0;
182	return (0); /* no or unknown flash */
183	}
184
185	value = s_addr[1];
186	value = value\|(value<<16);
187
188	switch (value) {
189	case FUJI_ID_29F800BA:
190	info->flash_id += FLASH_AM400T;
191	info->sector_count = 19;
192	info->size = 0x00100000;
193	break; /* => 1 MB */
194	default:
195	info->flash_id = FLASH_UNKNOWN;
196	return (0); /* => no or unknown flash */
197	}
198
199	/* set up sector start address table */
200	/* set sector offsets for bottom boot block type */
201	info->start[0] = base + 0x00000000;
202	info->start[1] = base + 0x00004000;
203	info->start[2] = base + 0x00006000;
204	info->start[3] = base + 0x00008000;
205	for (i = 4; i < info->sector_count; i++) {
206	info->start[i] = base + (i * 0x00010000) - 0x00030000;
207	}
208
209
210	/* check for protected sectors */
211	for (i = 0; i < info->sector_count; i++) {
212	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
213	/* D0 = 1 if protected */
214	s_addr = (volatile unsigned short *)(info->start[i]);
215	info->protect[i] = s_addr[2] & 1;
216	}
217
218	/*
219	* Prevent writes to uninitialized FLASH.
220	*/
221	if (info->flash_id != FLASH_UNKNOWN) {
222	s_addr = (volatile unsigned short *)info->start[0];
223	s_addr = 0x00F0; / reset bank */
224	}
225	return (info->size);
226	}
227
228
229	/*-----------------------------------------------------------------------
230	*/
231
232
233	int flash_erase (flash_info_t *info, int s_first, int s_last)
234	{
235	vu_long addr = (vu_long)(info->start[0]);
236	int flag, prot, sect;
237	ulong start, now, last;
238	#ifdef CONFIG_FLASH_16BIT
239	vu_short s_addr = (vu_short)addr;
240	#endif
241
242	if ((s_first < 0) \|\| (s_first > s_last)) {
243	if (info->flash_id == FLASH_UNKNOWN) {
244	printf ("- missing\n");
245	} else {
246	printf ("- no sectors to erase\n");
247	}
248	return 1;
249	}
250	/*#ifndef CONFIG_FLASH_16BIT
251	ulong type;
252	type = (info->flash_id & FLASH_VENDMASK);
253	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
254	printf ("Can't erase unknown flash type %08lx - aborted\n",
255	info->flash_id);
256	return;
257	}
258	#endif*/
259	prot = 0;
260	for (sect=s_first; sect<=s_last; ++sect) {
261	if (info->protect[sect]) {
262	prot++;
263	}
264	}
265
266	if (prot) {
267	printf ("- Warning: %d protected sectors will not be erased!\n",
268	prot);
269	} else {
270	printf ("\n");
271	}
272
273	start = get_timer (0);
274	last = start;
275	/* Start erase on unprotected sectors */
276	for (sect = s_first; sect<=s_last; sect++) {
277	if (info->protect[sect] == 0) { /* not protected */
278	#ifdef CONFIG_FLASH_16BIT
279	vu_short s_sect_addr = (vu_short)(info->start[sect]);
280	#else
281	vu_long sect_addr = (vu_long)(info->start[sect]);
282	#endif
283	/* Disable interrupts which might cause a timeout here */
284	flag = disable_interrupts();
285
286	#ifdef CONFIG_FLASH_16BIT
287
288	/printf("\ns_sect_addr=%x",s_sect_addr);/
289	s_addr[0x5555] = 0x00AA;
290	s_addr[0x2AAA] = 0x0055;
291	s_addr[0x5555] = 0x0080;
292	s_addr[0x5555] = 0x00AA;
293	s_addr[0x2AAA] = 0x0055;
294	s_sect_addr[0] = 0x0030;
295	#else
296	addr[0x5555] = 0x00AA00AA;
297	addr[0x2AAA] = 0x00550055;
298	addr[0x5555] = 0x00800080;
299	addr[0x5555] = 0x00AA00AA;
300	addr[0x2AAA] = 0x00550055;
301	sect_addr[0] = 0x00300030;
302	#endif
303	/* re-enable interrupts if necessary */
304	if (flag)
305	enable_interrupts();
306
307	/* wait at least 80us - let's wait 1 ms */
308	udelay (1000);
309
310	#ifdef CONFIG_FLASH_16BIT
311	while ((s_sect_addr[0] & 0x0080) != 0x0080) {
312	#else
313	while ((sect_addr[0] & 0x00800080) != 0x00800080) {
314	#endif
315	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
316	printf ("Timeout\n");
317	return 1;
318	}
319	/* show that we're waiting */
320	if ((now - last) > 1000) { /* every second */
321	putc ('.');
322	last = now;
323	}
324	}
325	}
326	}
327
328	/* reset to read mode */
329	addr = (volatile unsigned long *)info->start[0];
330	#ifdef CONFIG_FLASH_16BIT
331	s_addr[0] = 0x00F0; /* reset bank */
332	#else
333	addr[0] = 0x00F000F0; /* reset bank */
334	#endif
335
336	printf (" done\n");
337	return 0;
338	}
339
340
341	/*-----------------------------------------------------------------------
342	* Copy memory to flash, returns:
343	* 0 - OK
344	* 1 - write timeout
345	* 2 - Flash not erased
346	*/
347
348	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
349	{
350	ulong cp, wp, data;
351	int i, l, rc;
352
353	wp = (addr & ~3); /* get lower word aligned address */
354
355	/*
356	* handle unaligned start bytes
357	*/
358	if ((l = addr - wp) != 0) {
359	data = 0;
360	for (i=0, cp=wp; i<l; ++i, ++cp) {
361	data = (data << 8) \| ((uchar )cp);
362	}
363	for (; i<4 && cnt>0; ++i) {
364	data = (data << 8) \| *src++;
365	--cnt;
366	++cp;
367	}
368	for (; cnt==0 && i<4; ++i, ++cp) {
369	data = (data << 8) \| ((uchar )cp);
370	}
371
372	if ((rc = write_word(info, wp, data)) != 0) {
373	return (rc);
374	}
375	wp += 4;
376	}
377
378	/*
379	* handle word aligned part
380	*/
381	while (cnt >= 4) {
382	data = 0;
383	for (i=0; i<4; ++i) {
384	data = (data << 8) \| *src++;
385	}
386	if ((rc = write_word(info, wp, data)) != 0) {
387	return (rc);
388	}
389	wp += 4;
390	cnt -= 4;
391	}
392
393	if (cnt == 0) {
394	return (0);
395	}
396
397	/*
398	* handle unaligned tail bytes
399	*/
400	data = 0;
401	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
402	data = (data << 8) \| *src++;
403	--cnt;
404	}
405	for (; i<4; ++i, ++cp) {
406	data = (data << 8) \| ((uchar )cp);
407	}
408
409	return (write_word(info, wp, data));
410	}
411
412
413	/*-----------------------------------------------------------------------
414	* Write a word to Flash, returns:
415	* 0 - OK
416	* 1 - write timeout
417	* 2 - Flash not erased
418	*/
419	static int write_word (flash_info_t *info, ulong dest, ulong data)
420	{
421	vu_long addr = (vu_long)(info->start[0]);
422
423	#ifdef CONFIG_FLASH_16BIT
424	vu_short high_data;
425	vu_short low_data;
426	vu_short s_addr = (vu_short)addr;
427	#endif
428	ulong start;
429	int flag;
430
431	/* Check if Flash is (sufficiently) erased */
432	if ((((vu_long )dest) & data) != data) {
433	return (2);
434	}
435
436	#ifdef CONFIG_FLASH_16BIT
437	/* Write the 16 higher-bits */
438	/* Disable interrupts which might cause a timeout here */
439	flag = disable_interrupts();
440
441	high_data = ((data>>16) & 0x0000ffff);
442
443	s_addr[0x5555] = 0x00AA;
444	s_addr[0x2AAA] = 0x0055;
445	s_addr[0x5555] = 0x00A0;
446
447	((vu_short )dest) = high_data;
448
449
450	/* re-enable interrupts if necessary */
451	if (flag)
452	enable_interrupts();
453
454	/* data polling for D7 */
455	start = get_timer (0);
456	while ((((vu_short )dest) & 0x0080) != (high_data & 0x0080)) {
457	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
458	return (1);
459	}
460	}
461
462
463	/* Write the 16 lower-bits */
464	#endif
465
466	/* Disable interrupts which might cause a timeout here */
467	flag = disable_interrupts();
468	#ifdef CONFIG_FLASH_16BIT
469	dest += 0x2;
470	low_data = (data & 0x0000ffff);
471
472	s_addr[0x5555] = 0x00AA;
473	s_addr[0x2AAA] = 0x0055;
474	s_addr[0x5555] = 0x00A0;
475	((vu_short )dest) = low_data;
476
477	#else
478	addr[0x5555] = 0x00AA00AA;
479	addr[0x2AAA] = 0x00550055;
480	addr[0x5555] = 0x00A000A0;
481	((vu_long )dest) = data;
482	#endif
483
484	/* re-enable interrupts if necessary */
485	if (flag)
486	enable_interrupts();
487
488	/* data polling for D7 */
489	start = get_timer (0);
490
491	#ifdef CONFIG_FLASH_16BIT
492	while ((((vu_short )dest) & 0x0080) != (low_data & 0x0080)) {
493	#else
494	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
495	#endif
496
497	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
498	return (1);
499	}
500	}
501	return (0);
502	}