[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 ((long *) PHYS_FLASH_1, &flash_info[i]);
			flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
			break;
		case 1:
			flash_get_size ((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,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_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_AMLV128U:	printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
				break;
	case FLASH_AMLV320U:	printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
				break;
	case FLASH_AMLV640U:	printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
				break;
	case FLASH_AMLV320B:	printf ("AM29LV320MB (32Mbit, bottom boot sect)\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_LV128U_2:
			if (addr[15] != AMD_ID_LV128U_3) {
				debug ("Chip: AMLV128U -> unknown\n");
				info->flash_id = FLASH_UNKNOWN;
			} else {
				debug ("Chip: AMLV128U\n");
				info->flash_id += FLASH_AMLV128U;
				info->sector_count = 256;
				info->size = 0x02000000;
			}
			break;				/* => 32 MB	*/
		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_LV320B_2:
			if (addr[15] != AMD_ID_LV320B_3) {
				debug ("Chip: AMLV320B -> unknown\n");
				info->flash_id = FLASH_UNKNOWN;
			} else {
				debug ("Chip: AMLV320B\n");
				info->flash_id += FLASH_AMLV320B;
				info->sector_count = 71;
				info->size = 0x00800000;
			}
			break;				/* =>  8 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:
	49	flash_get_size ((long *) PHYS_FLASH_1, &flash_info[i]);
	50	flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
	51	break;
	52	case 1:
	53	flash_get_size ((long *) PHYS_FLASH_2, &flash_info[i]);
	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] );
	65	flash_protect ( FLAG_PROTECT_SET,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
	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) {
104	case FLASH_AMLV128U: printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
105	break;
106	case FLASH_AMLV320U: printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
107	break;
108	case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
109	break;
110	case FLASH_AMLV320B: printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
111	break;
112	default: printf ("Unknown Chip Type\n");
113	break;
114	}
115
116	printf (" Size: %ld MB in %d Sectors\n",
117	info->size >> 20, info->sector_count);
118
119	printf (" Sector Start Addresses:");
120	for (i=0; i<info->sector_count; ++i) {
121	if ((i % 5) == 0)
122	printf ("\n ");
123	printf (" %08lX%s",
124	info->start[i],
125	info->protect[i] ? " (RO)" : " "
126	);
127	}
128	printf ("\n");
129	return;
130	}
131
132	/*
133	* The following code cannot be run from FLASH!
134	*/
135	static ulong flash_get_size (vu_long addr, flash_info_t info)
136	{
137	short i;
138	ulong value;
139	ulong base = (ulong)addr;
140
141	/* Write auto select command: read Manufacturer ID */
142	addr[0x0555] = 0x00AA00AA;
143	addr[0x02AA] = 0x00550055;
144	addr[0x0555] = 0x00900090;
145
146	value = addr[0];
147
148	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
149
150	switch (value) {
151	case AMD_MANUFACT:
152	debug ("Manufacturer: AMD\n");
153	info->flash_id = FLASH_MAN_AMD;
154	break;
155	case FUJ_MANUFACT:
156	debug ("Manufacturer: FUJITSU\n");
157	info->flash_id = FLASH_MAN_FUJ;
158	break;
159	default:
160	debug ("Manufacturer: * unknown *\n");
161	info->flash_id = FLASH_UNKNOWN;
162	info->sector_count = 0;
163	info->size = 0;
164	return (0); /* no or unknown flash */
165	}
166
167	value = addr[1]; /* device ID */
168
169	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
170
171	switch (value) {
172
173	case AMD_ID_MIRROR:
174	debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
175	addr[14], addr[15]);
176	switch(addr[14]) {
177	case AMD_ID_LV128U_2:
178	if (addr[15] != AMD_ID_LV128U_3) {
179	debug ("Chip: AMLV128U -> unknown\n");
180	info->flash_id = FLASH_UNKNOWN;
181	} else {
182	debug ("Chip: AMLV128U\n");
183	info->flash_id += FLASH_AMLV128U;
184	info->sector_count = 256;
185	info->size = 0x02000000;
186	}
187	break; /* => 32 MB */
188	case AMD_ID_LV640U_2:
189	if (addr[15] != AMD_ID_LV640U_3) {
190	debug ("Chip: AMLV640U -> unknown\n");
191	info->flash_id = FLASH_UNKNOWN;
192	} else {
193	debug ("Chip: AMLV640U\n");
194	info->flash_id += FLASH_AMLV640U;
195	info->sector_count = 128;
196	info->size = 0x01000000;
197	}
198	break; /* => 16 MB */
199	case AMD_ID_LV320B_2:
200	if (addr[15] != AMD_ID_LV320B_3) {
201	debug ("Chip: AMLV320B -> unknown\n");
202	info->flash_id = FLASH_UNKNOWN;
203	} else {
204	debug ("Chip: AMLV320B\n");
205	info->flash_id += FLASH_AMLV320B;
206	info->sector_count = 71;
207	info->size = 0x00800000;
208	}
209	break; /* => 8 MB */
210	default:
211	debug ("Chip: * unknown *\n");
212	info->flash_id = FLASH_UNKNOWN;
213	break;
214	}
215	break;
216
217	default:
218	info->flash_id = FLASH_UNKNOWN;
219	return (0); /* => no or unknown flash */
220	}
221
222	/* set up sector start address table */
223	switch (value) {
224	case AMD_ID_MIRROR:
225	switch (info->flash_id & FLASH_TYPEMASK) {
226	/* only known types here - no default */
227	case FLASH_AMLV128U:
228	case FLASH_AMLV640U:
229	case FLASH_AMLV320U:
230	for (i = 0; i < info->sector_count; i++) {
231	info->start[i] = base;
232	base += 0x20000;
233	}
234	break;
235	case FLASH_AMLV320B:
236	for (i = 0; i < info->sector_count; i++) {
237	info->start[i] = base;
238	/*
239	* The first 8 sectors are 8 kB,
240	* all the other ones are 64 kB
241	*/
242	base += (i < 8)
243	? 2 * ( 8 << 10)
244	: 2 * (64 << 10);
245	}
246	break;
247	}
248	break;
249
250	default:
251	return (0);
252	break;
253	}
254
255	#if 0
256	/* check for protected sectors */
257	for (i = 0; i < info->sector_count; i++) {
258	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
259	/* D0 = 1 if protected */
260	addr = (volatile unsigned long *)(info->start[i]);
261	info->protect[i] = addr[2] & 1;
262	}
263	#endif
264
265	/*
266	* Prevent writes to uninitialized FLASH.
267	*/
268	if (info->flash_id != FLASH_UNKNOWN) {
269	addr = (volatile unsigned long *)info->start[0];
270
271	addr = 0x00F000F0; / reset bank */
272	}
273
274	return (info->size);
275	}
276
277
278	/*-----------------------------------------------------------------------
279	*/
280
281	int flash_erase (flash_info_t *info, int s_first, int s_last)
282	{
283	vu_long addr = (vu_long)(info->start[0]);
284	int flag, prot, sect, l_sect;
285	ulong start, now, last;
286
287	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
288
289	if ((s_first < 0) \|\| (s_first > s_last)) {
290	if (info->flash_id == FLASH_UNKNOWN) {
291	printf ("- missing\n");
292	} else {
293	printf ("- no sectors to erase\n");
294	}
295	return 1;
296	}
297
298	if ((info->flash_id == FLASH_UNKNOWN) \|\|
299	(info->flash_id > FLASH_AMD_COMP)) {
300	printf ("Can't erase unknown flash type %08lx - aborted\n",
301	info->flash_id);
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",
314	prot);
315	} else {
316	printf ("\n");
317	}
318
319	l_sect = -1;
320
321	/* Disable interrupts which might cause a timeout here */
322	flag = disable_interrupts();
323
324	addr[0x0555] = 0x00AA00AA;
325	addr[0x02AA] = 0x00550055;
326	addr[0x0555] = 0x00800080;
327	addr[0x0555] = 0x00AA00AA;
328	addr[0x02AA] = 0x00550055;
329
330	/* Start erase on unprotected sectors */
331	for (sect = s_first; sect<=s_last; sect++) {
332	if (info->protect[sect] == 0) { /* not protected */
333	addr = (vu_long*)(info->start[sect]);
334	addr[0] = 0x00300030;
335	l_sect = sect;
336	}
337	}
338
339	/* re-enable interrupts if necessary */
340	if (flag)
341	enable_interrupts();
342
343	/* wait at least 80us - let's wait 1 ms */
344	udelay (1000);
345
346	/*
347	* We wait for the last triggered sector
348	*/
349	if (l_sect < 0)
350	goto DONE;
351
352	start = get_timer (0);
353	last = start;
354	addr = (vu_long*)(info->start[l_sect]);
355	while ((addr[0] & 0x00800080) != 0x00800080) {
356	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
357	printf ("Timeout\n");
358	return 1;
359	}
360	/* show that we're waiting */
361	if ((now - last) > 100000) { /* every second */
362	putc ('.');
363	last = now;
364	}
365	}
366
367	DONE:
368	/* reset to read mode */
369	addr = (volatile unsigned long *)info->start[0];
370	addr[0] = 0x00F000F0; /* reset bank */
371
372	printf (" done\n");
373	return 0;
374	}
375
376	/*-----------------------------------------------------------------------
377	* Copy memory to flash, returns:
378	* 0 - OK
379	* 1 - write timeout
380	* 2 - Flash not erased
381	*/
382
383	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
384	{
385	ulong cp, wp, data;
386	int i, l, rc;
387
388	wp = (addr & ~3); /* get lower word aligned address */
389
390	/*
391	* handle unaligned start bytes
392	*/
393	if ((l = addr - wp) != 0) {
394	data = 0;
395	for (i=0, cp=wp; i<l; ++i, ++cp) {
396	data = (data << 8) \| ((uchar )cp);
397	}
398	for (; i<4 && cnt>0; ++i) {
399	data = (data << 8) \| *src++;
400	--cnt;
401	++cp;
402	}
403	for (; cnt==0 && i<4; ++i, ++cp) {
404	data = (data << 8) \| ((uchar )cp);
405	}
406
407	if ((rc = write_word(info, wp, SWAP(data))) != 0) {
408	return (rc);
409	}
410	wp += 4;
411	}
412
413	/*
414	* handle word aligned part
415	*/
416	while (cnt >= 4) {
417	data = 0;
418	for (i=0; i<4; ++i) {
419	data = (data << 8) \| *src++;
420	}
421	if ((rc = write_word(info, wp, SWAP(data))) != 0) {
422	return (rc);
423	}
424	wp += 4;
425	cnt -= 4;
426	}
427
428	if (cnt == 0) {
429	return (0);
430	}
431
432	/*
433	* handle unaligned tail bytes
434	*/
435	data = 0;
436	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
437	data = (data << 8) \| *src++;
438	--cnt;
439	}
440	for (; i<4; ++i, ++cp) {
441	data = (data << 8) \| ((uchar )cp);
442	}
443
444	return (write_word(info, wp, SWAP(data)));
445	}
446
447	/*-----------------------------------------------------------------------
448	* Write a word to Flash, returns:
449	* 0 - OK
450	* 1 - write timeout
451	* 2 - Flash not erased
452	*/
453	static int write_word (flash_info_t *info, ulong dest, ulong data)
454	{
455	vu_long addr = (vu_long)(info->start[0]);
456	ulong start;
ca0e7748	457	int flag;
ca0e7748 WD	458
	459	/* Check if Flash is (sufficiently) erased */
	460	if ((((vu_long )dest) & data) != data) {
	461	return (2);
	462	}
	463
	464	/* Disable interrupts which might cause a timeout here */
	465	flag = disable_interrupts();
	466
	467	addr[0x0555] = 0x00AA00AA;
	468	addr[0x02AA] = 0x00550055;
	469	addr[0x0555] = 0x00A000A0;
	470
	471	((vu_long )dest) = data;
	472
	473	/* re-enable interrupts if necessary */
	474	if (flag)
	475	enable_interrupts();
	476
	477	/* data polling for D7 */
	478	start = get_timer (0);
	479	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
	480	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
	481	return (1);
	482	}
	483	}
	484	return (0);
	485	}