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

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.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>

ulong myflush(void);


#define FLASH_BANK_SIZE 0x800000
#define MAIN_SECT_SIZE  0x20000
#define PARAM_SECT_SIZE 0x4000

/* puzzle magic for lart
 * data_*_flash are def'd in flashasm.S
 */

extern u32 data_from_flash(u32);
extern u32 data_to_flash(u32);

#define PUZZLE_FROM_FLASH(x)	data_from_flash((x))
#define PUZZLE_TO_FLASH(x)	data_to_flash((x))

flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];


#define CMD_READ_ARRAY		0x00FF00FF
#define CMD_IDENTIFY		0x00900090
#define CMD_ERASE_SETUP		0x00200020
#define CMD_ERASE_CONFIRM	0x00D000D0
#define CMD_PROGRAM		0x00400040
#define CMD_RESUME		0x00D000D0
#define CMD_SUSPEND		0x00B000B0
#define CMD_STATUS_READ		0x00700070
#define CMD_STATUS_RESET	0x00500050

#define BIT_BUSY		0x00800080
#define BIT_ERASE_SUSPEND	0x00400040
#define BIT_ERASE_ERROR		0x00200020
#define BIT_PROGRAM_ERROR	0x00100010
#define BIT_VPP_RANGE_ERROR	0x00080008
#define BIT_PROGRAM_SUSPEND	0x00040004
#define BIT_PROTECT_ERROR	0x00020002
#define BIT_UNDEFINED		0x00010001

#define BIT_SEQUENCE_ERROR	0x00300030
#define BIT_TIMEOUT		0x80000000

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

ulong flash_init(void)
{
    int i, j;
    ulong size = 0;

    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
    {
	ulong flashbase = 0;
	flash_info[i].flash_id =
	  (INTEL_MANUFACT & FLASH_VENDMASK) |
	  (INTEL_ID_28F160F3B & FLASH_TYPEMASK);
	flash_info[i].size = FLASH_BANK_SIZE;
	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
	if (i == 0)
	  flashbase = PHYS_FLASH_1;
	else
	  panic("configured too many flash banks!\n");
	for (j = 0; j < flash_info[i].sector_count; j++)
	{
	    if (j <= 7)
	    {
		flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
	    }
	    else
	    {
		flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
	    }
	}
	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;
}

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

    switch (info->flash_id & FLASH_VENDMASK)
    {
    case (INTEL_MANUFACT & FLASH_VENDMASK):
	printf("Intel: ");
	break;
    default:
	printf("Unknown Vendor ");
	break;
    }

    switch (info->flash_id & FLASH_TYPEMASK)
    {
    case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
	printf("2x 28F160F3B (16Mbit)\n");
	break;
    default:
	printf("Unknown Chip Type\n");
	goto Done;
	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");

Done:
}

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

int flash_error (ulong code)
{
	/* Check bit patterns */
	/* SR.7=0 is busy, SR.7=1 is ready */
	/* all other flags indicate error on 1 */
	/* SR.0 is undefined */
	/* Timeout is our faked flag */

	/* sequence is described in Intel 290644-005 document */

	/* check Timeout */
	if (code & BIT_TIMEOUT)
	{
		printf ("Timeout\n");
		return ERR_TIMOUT;
	}

	/* check Busy, SR.7 */
	if (~code & BIT_BUSY)
	{
		printf ("Busy\n");
		return ERR_PROG_ERROR;
	}

	/* check Vpp low, SR.3 */
	if (code & BIT_VPP_RANGE_ERROR)
	{
		printf ("Vpp range error\n");
		return ERR_PROG_ERROR;
	}

	/* check Device Protect Error, SR.1 */
	if (code & BIT_PROTECT_ERROR)
	{
		printf ("Device protect error\n");
		return ERR_PROG_ERROR;
	}

	/* check Command Seq Error, SR.4 & SR.5 */
	if (code & BIT_SEQUENCE_ERROR)
	{
		printf ("Command seqence error\n");
		return ERR_PROG_ERROR;
	}

	/* check Block Erase Error, SR.5 */
	if (code & BIT_ERASE_ERROR)
	{
		printf ("Block erase error\n");
		return ERR_PROG_ERROR;
	}

	/* check Program Error, SR.4 */
	if (code & BIT_PROGRAM_ERROR)
	{
		printf ("Program error\n");
		return ERR_PROG_ERROR;
	}

	/* check Block Erase Suspended, SR.6 */
	if (code & BIT_ERASE_SUSPEND)
	{
		printf ("Block erase suspended\n");
		return ERR_PROG_ERROR;
	}

	/* check Program Suspended, SR.2 */
	if (code & BIT_PROGRAM_SUSPEND)
	{
		printf ("Program suspended\n");
		return ERR_PROG_ERROR;
	}

	/* OK, no error */
	return ERR_OK;
}

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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
    ulong result;
    int iflag, cflag, prot, sect;
    int rc = ERR_OK;

    /* first look for protection bits */

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

    if ((s_first < 0) || (s_first > s_last)) {
	return ERR_INVAL;
    }

    if ((info->flash_id & FLASH_VENDMASK) !=
	(INTEL_MANUFACT & FLASH_VENDMASK)) {
	return ERR_UNKNOWN_FLASH_VENDOR;
    }

    prot = 0;
    for (sect=s_first; sect<=s_last; ++sect) {
	if (info->protect[sect]) {
	    prot++;
	}
    }
    if (prot)
	return ERR_PROTECTED;

    /*
     * Disable interrupts which might cause a timeout
     * here. Remember that our exception vectors are
     * at address 0 in the flash, and we don't want a
     * (ticker) exception to happen while the flash
     * chip is in programming mode.
     */
    cflag = icache_status();
    icache_disable();
    iflag = disable_interrupts();

    /* Start erase on unprotected sectors */
    for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
    {
	printf("Erasing sector %2d ... ", sect);

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked();

	if (info->protect[sect] == 0)
	{	/* not protected */
	    vu_long *addr = (vu_long *)(info->start[sect]);

	    *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
	    *addr = PUZZLE_TO_FLASH(CMD_ERASE_SETUP);
	    *addr = PUZZLE_TO_FLASH(CMD_ERASE_CONFIRM);

	    /* wait until flash is ready */
	    do
	    {
		/* check timeout */
		if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
		{
		    *addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
		    result = BIT_TIMEOUT;
		    break;
		}

		result = PUZZLE_FROM_FLASH(*addr);
	    }  while (~result & BIT_BUSY);

	    *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);

	    if ((rc = flash_error(result)) != ERR_OK)
		goto outahere;

	    printf("ok.\n");
	}
	else /* it was protected */
	{
	    printf("protected!\n");
	}
    }

    if (ctrlc())
      printf("User Interrupt!\n");

outahere:
    /* allow flash to settle - wait 10 ms */
    udelay_masked(10000);

    if (iflag)
      enable_interrupts();

    if (cflag)
      icache_enable();

    return rc;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash
 */

volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
{
    vu_long *addr = (vu_long *)dest;
    ulong result;
    int rc = ERR_OK;
    int cflag, iflag;

    /* Check if Flash is (sufficiently) erased
     */
    result = PUZZLE_FROM_FLASH(*addr);
    if ((result & data) != data)
	return ERR_NOT_ERASED;

    /*
     * Disable interrupts which might cause a timeout
     * here. Remember that our exception vectors are
     * at address 0 in the flash, and we don't want a
     * (ticker) exception to happen while the flash
     * chip is in programming mode.
     */
    cflag = icache_status();
    icache_disable();
    iflag = disable_interrupts();

    *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
    *addr = PUZZLE_TO_FLASH(CMD_PROGRAM);
    *addr = data;

    /* arm simple, non interrupt dependent timer */
    reset_timer_masked();

    /* wait until flash is ready */
    do
    {
	/* check timeout */
	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
	{
	    *addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
	    result = BIT_TIMEOUT;
	    break;
	}

	result = PUZZLE_FROM_FLASH(*addr);
    }  while (~result & BIT_BUSY);

    *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);

    rc = flash_error(result);

    if (iflag)
      enable_interrupts();

    if (cflag)
      icache_enable();

    return rc;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash.
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
    ulong cp, wp, data;
    int l;
    int i, 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 << 24);
	}
	for (; i<4 && cnt>0; ++i) {
	    data = (data >> 8) | (*src++ << 24);
	    --cnt;
	    ++cp;
	}
	for (; cnt==0 && i<4; ++i, ++cp) {
	    data = (data >> 8) | (*(uchar *)cp << 24);
	}

	if ((rc = write_word(info, wp, data)) != 0) {
	    return (rc);
	}
	wp += 4;
    }

    /*
     * handle word aligned part
     */
    while (cnt >= 4) {
	data = *((vu_long*)src);
	if ((rc = write_word(info, wp, data)) != 0) {
	    return (rc);
	}
	src += 4;
	wp  += 4;
	cnt -= 4;
    }

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

    /*
     * handle unaligned tail bytes
     */
    data = 0;
    for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	data = (data >> 8) | (*src++ << 24);
	--cnt;
    }
    for (; i<4; ++i, ++cp) {
	data = (data >> 8) | (*(uchar *)cp << 24);
    }

    return write_word(info, wp, data);
}
Commit	Line	Data
ea8015b8 WD	1	/*
	2	* (C) Copyright 2002
	3	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	4	* Marius Groeger <mgroeger@sysgo.de>
	5	*
	6	* See file CREDITS for list of people who contributed to this
	7	* project.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of
	12	* the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	22	* MA 02111-1307 USA
	23	*/
	24
	25	#include <common.h>
	26
	27	ulong myflush(void);
	28
	29
	30	#define FLASH_BANK_SIZE 0x800000
	31	#define MAIN_SECT_SIZE 0x20000
	32	#define PARAM_SECT_SIZE 0x4000
	33
	34	/* puzzle magic for lart
	35	* data_*_flash are def'd in flashasm.S
	36	*/
	37
	38	extern u32 data_from_flash(u32);
	39	extern u32 data_to_flash(u32);
	40
	41	#define PUZZLE_FROM_FLASH(x) data_from_flash((x))
	42	#define PUZZLE_TO_FLASH(x) data_to_flash((x))
	43
	44	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	45
	46
	47	#define CMD_READ_ARRAY 0x00FF00FF
	48	#define CMD_IDENTIFY 0x00900090
	49	#define CMD_ERASE_SETUP 0x00200020
	50	#define CMD_ERASE_CONFIRM 0x00D000D0
	51	#define CMD_PROGRAM 0x00400040
	52	#define CMD_RESUME 0x00D000D0
	53	#define CMD_SUSPEND 0x00B000B0
	54	#define CMD_STATUS_READ 0x00700070
	55	#define CMD_STATUS_RESET 0x00500050
	56
	57	#define BIT_BUSY 0x00800080
	58	#define BIT_ERASE_SUSPEND 0x00400040
	59	#define BIT_ERASE_ERROR 0x00200020
	60	#define BIT_PROGRAM_ERROR 0x00100010
	61	#define BIT_VPP_RANGE_ERROR 0x00080008
	62	#define BIT_PROGRAM_SUSPEND 0x00040004
	63	#define BIT_PROTECT_ERROR 0x00020002
	64	#define BIT_UNDEFINED 0x00010001
65
66	#define BIT_SEQUENCE_ERROR 0x00300030
67	#define BIT_TIMEOUT 0x80000000
68
69	/*-----------------------------------------------------------------------
70	*/
71
72	ulong flash_init(void)
73	{
74	int i, j;
75	ulong size = 0;
76
77	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
78	{
79	ulong flashbase = 0;
80	flash_info[i].flash_id =
81	(INTEL_MANUFACT & FLASH_VENDMASK) \|
82	(INTEL_ID_28F160F3B & FLASH_TYPEMASK);
83	flash_info[i].size = FLASH_BANK_SIZE;
84	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
85	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
86	if (i == 0)
87	flashbase = PHYS_FLASH_1;
88	else
5f535fe1	89	panic("configured too many flash banks!\n");
ea8015b8 WD	90	for (j = 0; j < flash_info[i].sector_count; j++)
	91	{
	92	if (j <= 7)
	93	{
	94	flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
	95	}
	96	else
	97	{
	98	flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
	99	}
	100	}
	101	size += flash_info[i].size;
	102	}
	103
	104	/* Protect monitor and environment sectors
	105	*/
	106	flash_protect(FLAG_PROTECT_SET,
	107	CFG_FLASH_BASE,
3b57fe0a	108	CFG_FLASH_BASE + monitor_flash_len - 1,
ea8015b8 WD	109	&flash_info[0]);
	110
	111	flash_protect(FLAG_PROTECT_SET,
	112	CFG_ENV_ADDR,
	113	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
	114	&flash_info[0]);
	115
	116	return size;
	117	}
	118
	119	/*-----------------------------------------------------------------------
	120	*/
	121	void flash_print_info (flash_info_t *info)
	122	{
	123	int i;
	124
	125	switch (info->flash_id & FLASH_VENDMASK)
	126	{
	127	case (INTEL_MANUFACT & FLASH_VENDMASK):
	128	printf("Intel: ");
	129	break;
	130	default:
	131	printf("Unknown Vendor ");
	132	break;
	133	}
	134
	135	switch (info->flash_id & FLASH_TYPEMASK)
	136	{
	137	case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
	138	printf("2x 28F160F3B (16Mbit)\n");
	139	break;
	140	default:
	141	printf("Unknown Chip Type\n");
	142	goto Done;
	143	break;
	144	}
	145
	146	printf(" Size: %ld MB in %d Sectors\n",
	147	info->size >> 20, info->sector_count);
	148
	149	printf(" Sector Start Addresses:");
	150	for (i = 0; i < info->sector_count; i++)
	151	{
	152	if ((i % 5) == 0)
	153	{
	154	printf ("\n ");
	155	}
	156	printf (" %08lX%s", info->start[i],
	157	info->protect[i] ? " (RO)" : " ");
	158	}
	159	printf ("\n");
	160
	161	Done:
	162	}
	163
	164	/*-----------------------------------------------------------------------
	165	*/
	166
	167	int flash_error (ulong code)
	168	{
	169	/* Check bit patterns */
	170	/* SR.7=0 is busy, SR.7=1 is ready */
	171	/* all other flags indicate error on 1 */
	172	/* SR.0 is undefined */
173	/* Timeout is our faked flag */
174
175	/* sequence is described in Intel 290644-005 document */
176
177	/* check Timeout */
178	if (code & BIT_TIMEOUT)
179	{
180	printf ("Timeout\n");
181	return ERR_TIMOUT;
182	}
183
184	/* check Busy, SR.7 */
185	if (~code & BIT_BUSY)
186	{
187	printf ("Busy\n");
188	return ERR_PROG_ERROR;
189	}
190
191	/* check Vpp low, SR.3 */
192	if (code & BIT_VPP_RANGE_ERROR)
193	{
194	printf ("Vpp range error\n");
195	return ERR_PROG_ERROR;
196	}
197
198	/* check Device Protect Error, SR.1 */
199	if (code & BIT_PROTECT_ERROR)
200	{
201	printf ("Device protect error\n");
202	return ERR_PROG_ERROR;
203	}
204
205	/* check Command Seq Error, SR.4 & SR.5 */
206	if (code & BIT_SEQUENCE_ERROR)
207	{
208	printf ("Command seqence error\n");
209	return ERR_PROG_ERROR;
210	}
211
212	/* check Block Erase Error, SR.5 */
213	if (code & BIT_ERASE_ERROR)
214	{
215	printf ("Block erase error\n");
216	return ERR_PROG_ERROR;
217	}
218
219	/* check Program Error, SR.4 */
220	if (code & BIT_PROGRAM_ERROR)
221	{
222	printf ("Program error\n");
223	return ERR_PROG_ERROR;
224	}
225
226	/* check Block Erase Suspended, SR.6 */
227	if (code & BIT_ERASE_SUSPEND)
228	{
229	printf ("Block erase suspended\n");
230	return ERR_PROG_ERROR;
231	}
232
233	/* check Program Suspended, SR.2 */
234	if (code & BIT_PROGRAM_SUSPEND)
235	{
236	printf ("Program suspended\n");
237	return ERR_PROG_ERROR;
238	}
239
240	/* OK, no error */
241	return ERR_OK;
242	}
243
244	/*-----------------------------------------------------------------------
245	*/
246
247	int flash_erase (flash_info_t *info, int s_first, int s_last)
248	{
249	ulong result;
250	int iflag, cflag, prot, sect;
251	int rc = ERR_OK;
252
253	/* first look for protection bits */
254
255	if (info->flash_id == FLASH_UNKNOWN)
256	return ERR_UNKNOWN_FLASH_TYPE;
257
258	if ((s_first < 0) \|\| (s_first > s_last)) {
259	return ERR_INVAL;
260	}
261
262	if ((info->flash_id & FLASH_VENDMASK) !=
263	(INTEL_MANUFACT & FLASH_VENDMASK)) {
264	return ERR_UNKNOWN_FLASH_VENDOR;
265	}
266
267	prot = 0;
268	for (sect=s_first; sect<=s_last; ++sect) {
269	if (info->protect[sect]) {
270	prot++;
271	}
272	}
273	if (prot)
274	return ERR_PROTECTED;
275
276	/*
277	* Disable interrupts which might cause a timeout
278	* here. Remember that our exception vectors are
279	* at address 0 in the flash, and we don't want a
280	* (ticker) exception to happen while the flash
281	* chip is in programming mode.
282	*/
283	cflag = icache_status();
284	icache_disable();
285	iflag = disable_interrupts();
286
287	/* Start erase on unprotected sectors */
288	for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
289	{
290	printf("Erasing sector %2d ... ", sect);
291
292	/* arm simple, non interrupt dependent timer */
293	reset_timer_masked();
294
295	if (info->protect[sect] == 0)
296	{ /* not protected */
297	vu_long addr = (vu_long )(info->start[sect]);
298
299	*addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
300	*addr = PUZZLE_TO_FLASH(CMD_ERASE_SETUP);
301	*addr = PUZZLE_TO_FLASH(CMD_ERASE_CONFIRM);
302
303	/* wait until flash is ready */
304	do
305	{
306	/* check timeout */
307	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
308	{
309	*addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
310	result = BIT_TIMEOUT;
311	break;
312	}
313
314	result = PUZZLE_FROM_FLASH(*addr);
315	} while (~result & BIT_BUSY);
316
317	*addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);
318
319	if ((rc = flash_error(result)) != ERR_OK)
8bde7f77	320	goto outahere;
ea8015b8 WD	321
	322	printf("ok.\n");
	323	}
	324	else /* it was protected */
	325	{
	326	printf("protected!\n");
	327	}
	328	}
	329
	330	if (ctrlc())
	331	printf("User Interrupt!\n");
	332
	333	outahere:
	334	/* allow flash to settle - wait 10 ms */
	335	udelay_masked(10000);
	336
	337	if (iflag)
	338	enable_interrupts();
	339
	340	if (cflag)
	341	icache_enable();
	342
	343	return rc;
	344	}
	345
	346	/*-----------------------------------------------------------------------
	347	* Copy memory to flash
	348	*/
	349
	350	volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
	351	{
	352	vu_long addr = (vu_long )dest;
	353	ulong result;
	354	int rc = ERR_OK;
	355	int cflag, iflag;
	356
	357	/* Check if Flash is (sufficiently) erased
	358	*/
	359	result = PUZZLE_FROM_FLASH(*addr);
	360	if ((result & data) != data)
8bde7f77	361	return ERR_NOT_ERASED;
ea8015b8 WD	362
	363	/*
	364	* Disable interrupts which might cause a timeout
	365	* here. Remember that our exception vectors are
	366	* at address 0 in the flash, and we don't want a
	367	* (ticker) exception to happen while the flash
	368	* chip is in programming mode.
	369	*/
	370	cflag = icache_status();
	371	icache_disable();
	372	iflag = disable_interrupts();
	373
	374	*addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
	375	*addr = PUZZLE_TO_FLASH(CMD_PROGRAM);
	376	*addr = data;
	377
	378	/* arm simple, non interrupt dependent timer */
	379	reset_timer_masked();
	380
	381	/* wait until flash is ready */
	382	do
	383	{
	384	/* check timeout */
	385	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
	386	{
	387	*addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
	388	result = BIT_TIMEOUT;
	389	break;
	390	}
	391
	392	result = PUZZLE_FROM_FLASH(*addr);
	393	} while (~result & BIT_BUSY);
	394
	395	*addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);
	396
	397	rc = flash_error(result);
	398
	399	if (iflag)
	400	enable_interrupts();
	401
	402	if (cflag)
	403	icache_enable();
	404
	405	return rc;
	406	}
	407
	408	/*-----------------------------------------------------------------------
	409	* Copy memory to flash.
	410	*/
	411
	412	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	413	{
	414	ulong cp, wp, data;
	415	int l;
	416	int i, rc;
	417
	418	wp = (addr & ~3); /* get lower word aligned address */
	419
	420	/*
	421	* handle unaligned start bytes
	422	*/
	423	if ((l = addr - wp) != 0) {
	424	data = 0;
	425	for (i=0, cp=wp; i<l; ++i, ++cp) {
426	data = (data >> 8) \| ((uchar )cp << 24);
427	}
428	for (; i<4 && cnt>0; ++i) {
429	data = (data >> 8) \| (*src++ << 24);
430	--cnt;
431	++cp;
432	}
433	for (; cnt==0 && i<4; ++i, ++cp) {
434	data = (data >> 8) \| ((uchar )cp << 24);
435	}
436
437	if ((rc = write_word(info, wp, data)) != 0) {
438	return (rc);
439	}
440	wp += 4;
441	}
442
443	/*
444	* handle word aligned part
445	*/
446	while (cnt >= 4) {
447	data = ((vu_long)src);
448	if ((rc = write_word(info, wp, data)) != 0) {
449	return (rc);
450	}
451	src += 4;
452	wp += 4;
453	cnt -= 4;
454	}
455
456	if (cnt == 0) {
457	return ERR_OK;
458	}
459
460	/*
461	* handle unaligned tail bytes
462	*/
463	data = 0;
464	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
465	data = (data >> 8) \| (*src++ << 24);
466	--cnt;
467	}
468	for (; i<4; ++i, ++cp) {
469	data = (data >> 8) \| ((uchar )cp << 24);
470	}
471
472	return write_word(info, wp, data);
473	}