[people/ms/u-boot.git] / board / nx823 / 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.
 *
 * 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>

flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
extern u_long  *my_sernum;		/* from nx823.c */

/*-----------------------------------------------------------------------
 * Protection Flags:
 */
#define FLAG_PROTECT_SET	0x01
#define FLAG_PROTECT_CLEAR	0x02

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

#ifdef FLASH_PORT_WIDTH16
#define FLASH_PORT_WIDTH		ushort
#define FLASH_PORT_WIDTHV		vu_short
#else
#define FLASH_PORT_WIDTH		ulong
#define FLASH_PORT_WIDTHV		vu_long
#endif

#define FPW		FLASH_PORT_WIDTH
#define FPWV	FLASH_PORT_WIDTHV

/*-----------------------------------------------------------------------
 * 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);

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

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

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

	/* Static FLASH Bank configuration here - FIXME XXX */
	size_b0 = flash_get_size((FPW *)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 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;

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

	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);

	/* monitor protection ON by default */
	(void)flash_protect(FLAG_PROTECT_SET,
			    CONFIG_SYS_FLASH_BASE,
			    CONFIG_SYS_FLASH_BASE+monitor_flash_len-1,
			    &flash_info[0]);

	flash_info[0].size = size_b0;

	return (size_b0);
}

/*-----------------------------------------------------------------------
 */
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 * 0x00020000);
		}
	}
}

/*-----------------------------------------------------------------------
 */
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_28F320J3A:
				printf ("28F320J3A\n"); break;
   case FLASH_28F640J3A:
				printf ("28F640J3A\n"); break;
   case FLASH_28F128J3A:
				printf ("28F128J3A\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)
{
	FPW value;

	/* Write auto select command: read Manufacturer ID */
	addr[0x5555] = (FPW)0x00AA00AA;
	addr[0x2AAA] = (FPW)0x00550055;
	addr[0x5555] = (FPW)0x00900090;

	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	*/
	}

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

   switch (value) {
   case (FPW)INTEL_ID_28F320J3A:
      info->flash_id += FLASH_28F320J3A;
      info->sector_count = 32;
      info->size = 0x00400000;
      break;            /* => 4 MB     */

   case (FPW)INTEL_ID_28F640J3A:
      info->flash_id += FLASH_28F640J3A;
      info->sector_count = 64;
      info->size = 0x00800000;
      break;            /* => 8 MB     */

   case (FPW)INTEL_ID_28F128J3A:
      info->flash_id += FLASH_28F128J3A;
      info->sector_count = 128;
      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, now, last;
	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");
	}

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

			/* Disable interrupts which might cause a timeout here */
			flag = disable_interrupts();

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

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

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

			while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
				if ((now=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;
				}

				/* show that we're waiting */
			if ((now - last) > 1000) {	/* every second */
					putc ('.');
					last = now;
				}
			}

			*addr = (FPW)0x00FF00FF;	/* reset 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

	/* save sernum if needed */
	if (addr >= CONFIG_SYS_FLASH_SN_SECTOR && addr < CONFIG_SYS_FLASH_SN_BASE)
	{
		u_long dest = CONFIG_SYS_FLASH_SN_BASE;
		u_short *sn = (u_short *)my_sernum;

		printf("(saving sernum)");
		for (i=0; i<4; i++)
		{
			if ((rc = write_data(info, dest, sn[i])) != 0) {
				return (rc);
			}
			dest += port_width;
		}
	}

	/*
	 * 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, 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, data)) != 0) {
			return (rc);
		}
		wp  += port_width;
		cnt -= port_width;
		if (count++ > 0x800)
		{
			putc('.');
			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, 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;
	ulong start;
	int flag;

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

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

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

	start = get_timer (0);

	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);
}
Commit	Line	Data
affae2bf 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	* 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 <mpc8xx.h>
	29
6d0f6bcf	30	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
affae2bf WD	31	extern u_long my_sernum; / from nx823.c */
	32
	33	/*-----------------------------------------------------------------------
	34	* Protection Flags:
	35	*/
	36	#define FLAG_PROTECT_SET 0x01
	37	#define FLAG_PROTECT_CLEAR 0x02
	38
	39	/* Board support for 1 or 2 flash devices */
	40	#undef FLASH_PORT_WIDTH32
	41	#define FLASH_PORT_WIDTH16
	42
	43	#ifdef FLASH_PORT_WIDTH16
	44	#define FLASH_PORT_WIDTH ushort
	45	#define FLASH_PORT_WIDTHV vu_short
	46	#else
	47	#define FLASH_PORT_WIDTH ulong
	48	#define FLASH_PORT_WIDTHV vu_long
	49	#endif
	50
	51	#define FPW FLASH_PORT_WIDTH
	52	#define FPWV FLASH_PORT_WIDTHV
	53
	54	/*-----------------------------------------------------------------------
	55	* Functions
	56	*/
	57	static ulong flash_get_size (FPW addr, flash_info_t info);
	58	static int write_data (flash_info_t *info, ulong dest, FPW data);
	59	static void flash_get_offsets (ulong base, flash_info_t *info);
	60
	61	/*-----------------------------------------------------------------------
	62	*/
	63
	64	unsigned long flash_init (void)
	65	{
6d0f6bcf	66	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR;
affae2bf WD	67	volatile memctl8xx_t *memctl = &immap->im_memctl;
	68	unsigned long size_b0;
	69	int i;
	70
	71	/* Init: no FLASHes known */
6d0f6bcf	72	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
affae2bf WD	73	flash_info[i].flash_id = FLASH_UNKNOWN;
	74	}
	75
	76	/* Static FLASH Bank configuration here - FIXME XXX */
	77	size_b0 = flash_get_size((FPW *)FLASH_BASE0_PRELIM, &flash_info[0]);
	78
	79	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	80	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	81	size_b0, size_b0<<20);
	82	}
	83
	84	/* Remap FLASH according to real size */
6d0f6bcf JCPV	85	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH \| (-size_b0 & 0xFFFF8000);
6d0f6bcf JCPV	86	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) \| BR_PS_16 \| BR_MS_GPCM \| BR_V;
affae2bf WD	87
affae2bf WD	88	/* Re-do sizing to get full correct info */
6d0f6bcf	89	size_b0 = flash_get_size((FPW *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
affae2bf	90
6d0f6bcf	91	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
affae2bf WD	92
	93	/* monitor protection ON by default */
	94	(void)flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	95	CONFIG_SYS_FLASH_BASE,
6d0f6bcf JCPV	96	CONFIG_SYS_FLASH_BASE+monitor_flash_len-1,
affae2bf WD	97	&flash_info[0]);
	98
	99	flash_info[0].size = size_b0;
	100
	101	return (size_b0);
	102	}
	103
	104	/*-----------------------------------------------------------------------
	105	*/
	106	static void flash_get_offsets (ulong base, flash_info_t *info)
	107	{
	108	int i;
	109
	110	if (info->flash_id == FLASH_UNKNOWN) {
	111	return;
	112	}
	113
	114	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
	115	for (i = 0; i < info->sector_count; i++) {
	116	info->start[i] = base + (i * 0x00020000);
	117	}
	118	}
	119	}
	120
	121	/*-----------------------------------------------------------------------
	122	*/
	123	void flash_print_info (flash_info_t *info)
	124	{
	125	int i;
	126
	127	if (info->flash_id == FLASH_UNKNOWN) {
	128	printf ("missing or unknown FLASH type\n");
	129	return;
	130	}
	131
	132	switch (info->flash_id & FLASH_VENDMASK) {
	133	case FLASH_MAN_INTEL: printf ("INTEL "); break;
	134	default: printf ("Unknown Vendor "); break;
	135	}
	136
	137	switch (info->flash_id & FLASH_TYPEMASK) {
	138	case FLASH_28F320J3A:
	139	printf ("28F320J3A\n"); break;
	140	case FLASH_28F640J3A:
	141	printf ("28F640J3A\n"); break;
	142	case FLASH_28F128J3A:
	143	printf ("28F128J3A\n"); break;
	144	default: printf ("Unknown Chip Type\n"); break;
	145	}
	146
	147	printf (" Size: %ld MB in %d Sectors\n",
	148	info->size >> 20, info->sector_count);
	149
	150	printf (" Sector Start Addresses:");
	151	for (i=0; i<info->sector_count; ++i) {
	152	if ((i % 5) == 0)
	153	printf ("\n ");
	154	printf (" %08lX%s",
	155	info->start[i],
	156	info->protect[i] ? " (RO)" : " "
	157	);
	158	}
	159	printf ("\n");
	160	return;
161	}
162
163	/*-----------------------------------------------------------------------
164	*/
165
166
167	/*-----------------------------------------------------------------------
168	*/
169
170	/*
171	* The following code cannot be run from FLASH!
172	*/
173
174	static ulong flash_get_size (FPW addr, flash_info_t info)
175	{
176	FPW value;
177
178	/* Write auto select command: read Manufacturer ID */
179	addr[0x5555] = (FPW)0x00AA00AA;
180	addr[0x2AAA] = (FPW)0x00550055;
181	addr[0x5555] = (FPW)0x00900090;
182
183	value = addr[0];
184
185	switch (value) {
186	case (FPW)INTEL_MANUFACT:
187	info->flash_id = FLASH_MAN_INTEL;
188	break;
189	default:
190	info->flash_id = FLASH_UNKNOWN;
191	info->sector_count = 0;
192	info->size = 0;
193	addr[0] = (FPW)0x00FF00FF; /* restore read mode */
194	return (0); /* no or unknown flash */
195	}
196
197	value = addr[1]; /* device ID */
198
199	switch (value) {
200	case (FPW)INTEL_ID_28F320J3A:
201	info->flash_id += FLASH_28F320J3A;
202	info->sector_count = 32;
203	info->size = 0x00400000;
204	break; /* => 4 MB */
205
206	case (FPW)INTEL_ID_28F640J3A:
207	info->flash_id += FLASH_28F640J3A;
208	info->sector_count = 64;
209	info->size = 0x00800000;
210	break; /* => 8 MB */
211
212	case (FPW)INTEL_ID_28F128J3A:
213	info->flash_id += FLASH_28F128J3A;
214	info->sector_count = 128;
215	info->size = 0x01000000;
216	break; /* => 16 MB */
217
218	default:
219	info->flash_id = FLASH_UNKNOWN;
220	break;
221	}
222
6d0f6bcf	223	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
affae2bf	224	printf (" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	225	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	226	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
affae2bf WD	227	}
	228
	229	addr[0] = (FPW)0x00FF00FF; /* restore read mode */
	230
	231	return (info->size);
	232	}
	233
	234
	235	/*-----------------------------------------------------------------------
	236	*/
	237
	238	int flash_erase (flash_info_t *info, int s_first, int s_last)
	239	{
	240	int flag, prot, sect;
	241	ulong type, start, now, last;
	242	int rcode = 0;
	243
	244	if ((s_first < 0) \|\| (s_first > s_last)) {
	245	if (info->flash_id == FLASH_UNKNOWN) {
	246	printf ("- missing\n");
	247	} else {
	248	printf ("- no sectors to erase\n");
	249	}
	250	return 1;
	251	}
	252
	253	type = (info->flash_id & FLASH_VENDMASK);
	254	if ((type != FLASH_MAN_INTEL)) {
	255	printf ("Can't erase unknown flash type %08lx - aborted\n",
	256	info->flash_id);
	257	return 1;
	258	}
	259
	260	prot = 0;
	261	for (sect=s_first; sect<=s_last; ++sect) {
	262	if (info->protect[sect]) {
	263	prot++;
	264	}
	265	}
	266
	267	if (prot) {
	268	printf ("- Warning: %d protected sectors will not be erased!\n",
	269	prot);
	270	} else {
	271	printf ("\n");
	272	}
	273
	274	start = get_timer (0);
	275	last = start;
	276	/* Start erase on unprotected sectors */
	277	for (sect = s_first; sect<=s_last; sect++) {
	278	if (info->protect[sect] == 0) { /* not protected */
	279	FPWV addr = (FPWV )(info->start[sect]);
	280	FPW status;
	281
	282	/* Disable interrupts which might cause a timeout here */
	283	flag = disable_interrupts();
	284
	285	addr = (FPW)0x00500050; / clear status register */
	286	addr = (FPW)0x00200020; / erase setup */
	287	addr = (FPW)0x00D000D0; / erase confirm */
	288
	289	/* re-enable interrupts if necessary */
	290	if (flag)
291	enable_interrupts();
292
293	/* wait at least 80us - let's wait 1 ms */
294	udelay (1000);
295
296	while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
6d0f6bcf	297	if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
affae2bf WD	298	printf ("Timeout\n");
	299	addr = (FPW)0x00B000B0; / suspend erase */
	300	addr = (FPW)0x00FF00FF; / reset to read mode */
	301	rcode = 1;
	302	break;
	303	}
	304
	305	/* show that we're waiting */
	306	if ((now - last) > 1000) { /* every second */
	307	putc ('.');
	308	last = now;
	309	}
	310	}
	311
	312	addr = (FPW)0x00FF00FF; / reset to read mode */
	313	printf (" done\n");
	314	}
	315	}
	316	return rcode;
	317	}
	318
	319	/*-----------------------------------------------------------------------
	320	* Copy memory to flash, returns:
	321	* 0 - OK
	322	* 1 - write timeout
	323	* 2 - Flash not erased
	324	* 4 - Flash not identified
	325	*/
	326
	327	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	328	{
	329	ulong cp, wp;
	330	FPW data;
	331	int count, i, l, rc, port_width;
	332
	333	if (info->flash_id == FLASH_UNKNOWN) {
	334	return 4;
	335	}
	336	/* get lower word aligned address */
	337	#ifdef FLASH_PORT_WIDTH16
	338	wp = (addr & ~1);
	339	port_width = 2;
	340	#else
	341	wp = (addr & ~3);
	342	port_width = 4;
	343	#endif
	344
	345	/* save sernum if needed */
6d0f6bcf	346	if (addr >= CONFIG_SYS_FLASH_SN_SECTOR && addr < CONFIG_SYS_FLASH_SN_BASE)
affae2bf	347	{
6d0f6bcf	348	u_long dest = CONFIG_SYS_FLASH_SN_BASE;
affae2bf WD	349	u_short sn = (u_short )my_sernum;
	350
	351	printf("(saving sernum)");
	352	for (i=0; i<4; i++)
	353	{
	354	if ((rc = write_data(info, dest, sn[i])) != 0) {
	355	return (rc);
	356	}
	357	dest += port_width;
	358	}
	359	}
	360
	361	/*
	362	* handle unaligned start bytes
	363	*/
	364	if ((l = addr - wp) != 0) {
	365	data = 0;
	366	for (i=0, cp=wp; i<l; ++i, ++cp) {
	367	data = (data << 8) \| ((uchar )cp);
	368	}
	369	for (; i<port_width && cnt>0; ++i) {
	370	data = (data << 8) \| *src++;
	371	--cnt;
	372	++cp;
	373	}
	374	for (; cnt==0 && i<port_width; ++i, ++cp) {
	375	data = (data << 8) \| ((uchar )cp);
	376	}
	377
	378	if ((rc = write_data(info, wp, data)) != 0) {
	379	return (rc);
	380	}
	381	wp += port_width;
	382	}
	383
	384	/*
	385	* handle word aligned part
	386	*/
	387	count = 0;
	388	while (cnt >= port_width) {
	389	data = 0;
	390	for (i=0; i<port_width; ++i) {
	391	data = (data << 8) \| *src++;
	392	}
	393	if ((rc = write_data(info, wp, data)) != 0) {
	394	return (rc);
	395	}
	396	wp += port_width;
	397	cnt -= port_width;
	398	if (count++ > 0x800)
	399	{
	400	putc('.');
	401	count = 0;
	402	}
	403	}
	404
	405	if (cnt == 0) {
	406	return (0);
	407	}
	408
	409	/*
	410	* handle unaligned tail bytes
	411	*/
	412	data = 0;
413	for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) {
414	data = (data << 8) \| *src++;
415	--cnt;
416	}
417	for (; i<port_width; ++i, ++cp) {
418	data = (data << 8) \| ((uchar )cp);
419	}
420
421	return (write_data(info, wp, data));
422	}
423
424	/*-----------------------------------------------------------------------
425	* Write a word or halfword to Flash, returns:
426	* 0 - OK
427	* 1 - write timeout
428	* 2 - Flash not erased
429	*/
430	static int write_data (flash_info_t *info, ulong dest, FPW data)
431	{
432	FPWV addr = (FPWV )dest;
433	ulong status;
434	ulong start;
435	int flag;
436
437	/* Check if Flash is (sufficiently) erased */
438	if ((*addr & data) != data) {
439	printf("not erased at %08lx (%x)\n",(ulong)addr,*addr);
440	return (2);
441	}
442	/* Disable interrupts which might cause a timeout here */
443	flag = disable_interrupts();
444
445	addr = (FPW)0x00400040; / write setup */
446	*addr = data;
447
448	/* re-enable interrupts if necessary */
449	if (flag)
450	enable_interrupts();
451
452	start = get_timer (0);
453
454	while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) {
6d0f6bcf	455	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
affae2bf WD	456	addr = (FPW)0x00FF00FF; / restore read mode */
	457	return (1);
	458	}
	459	}
	460
	461	addr = (FPW)0x00FF00FF; / restore read mode */
	462
	463	return (0);
	464	}