[people/ms/u-boot.git] / board / ep8260 / flash.c

/*
 * (C) Copyright 2001, 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
 *
 * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
 *
 * This file is based on board/tqm8260/flash.c.
 *--------------------------------------------------------------------
 * 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>

#define V_ULONG(a)	(*(volatile unsigned long *)( a ))
#define V_BYTE(a)	(*(volatile unsigned char *)( a ))


flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];


/*-----------------------------------------------------------------------
 */
void flash_reset(void)
{
	if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
		V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
		V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
	}
}

/*-----------------------------------------------------------------------
 */
ulong flash_get_size( ulong baseaddr, flash_info_t *info )
{
	short i;
	unsigned long flashtest_h, flashtest_l;

	/* Write auto select command sequence and test FLASH answer */
	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;

	flashtest_h = V_ULONG(baseaddr);		/* manufacturer ID	   */
	flashtest_l = V_ULONG(baseaddr + 4);

	if ((int)flashtest_h == AMD_MANUFACT) {
		info->flash_id = FLASH_MAN_AMD;
	} else {
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);				/* no or unknown flash	   */
	}

	flashtest_h = V_ULONG(baseaddr + 8);	        /* device ID		   */
	flashtest_l = V_ULONG(baseaddr + 12);
	if (flashtest_h != flashtest_l) {
		info->flash_id = FLASH_UNKNOWN;
		return(0);
	}

	switch((int)flashtest_h) {
	case AMD_ID_DL323B:
		info->flash_id += FLASH_AMDL323B;
		info->sector_count = 71;
		info->size = 0x01000000;	 /* 4 * 4 MB = 16 MB	*/
		break;
	case AMD_ID_LV640U:	/* AMDLV640 and AMDLV641 have same ID */
		info->flash_id += FLASH_AMLV640U;
		info->sector_count = 128;
		info->size = 0x02000000;	/* 4 * 8 MB = 32 MB	*/
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		return(0);				/* no or unknown flash	   */
	}

	if(flashtest_h == AMD_ID_LV640U) {
		/* set up sector start adress table (uniform sector type) */
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = baseaddr + (i * 0x00040000);
	} else {
		/* set up sector start adress table (bottom sector type) */
		for (i = 0; i < 8; i++) {
			info->start[i] = baseaddr + (i * 0x00008000);
		}
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
		}
	}
	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
		    (V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
			info->protect[i] = 1;		/* D0 = 1 if protected */
		} else {
			info->protect[i] = 0;
		}
	}

	flash_reset();
	return(info->size);
}

/*-----------------------------------------------------------------------
 */
unsigned long flash_init (void)
{
	unsigned long size_b0 = 0;
	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 (only one bank) */

	size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0>>20);
	}

	/*
	 * protect monitor and environment sectors
	 */

#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_SYS_MONITOR_BASE,
		      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
		      &flash_info[0]);
#endif

#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
# ifndef  CONFIG_ENV_SIZE
#  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
# endif
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
		      &flash_info[0]);
#endif

	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 >> 16) & 0xff) {
	case FLASH_MAN_AMD:	    printf ("AMD ");		    break;
	default:		    printf ("Unknown Vendor ");	    break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AMDL323B:	printf ("29DL323B (32 M, bottom sector)\n");
				break;
	case FLASH_AMLV640U:	printf ("29LV640U (64 M, uniform 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;
}

/*-----------------------------------------------------------------------
 */
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
	int flag, prot, sect, l_sect;
	ulong start, now, 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;
	}

	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();

	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	udelay (1000);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			V_ULONG( info->start[sect] ) = 0x00300030;
			V_ULONG( info->start[sect] + 4 ) = 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;
	while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
	       (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
	{
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			serial_putc ('.');
			last = now;
		}
	}

 DONE:
	/* reset to read mode */
	flash_reset ();

	printf (" done\n");
	return 0;
}

static int write_dword (flash_info_t *, ulong, unsigned char *);

/*-----------------------------------------------------------------------
 * 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 dp;
	static unsigned char bb[8];
	int i, l, rc, cc = cnt;

	dp = (addr & ~7);	/* get lower dword aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - dp) != 0) {
		for (i = 0; i < 8; i++)
			bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
		if ((rc = write_dword(info, dp, bb)) != 0)
		{
			return (rc);
		}
		dp += 8;
		cc -= 8 - l;
	}

	/*
	 * handle word aligned part
	 */
	while (cc >= 8) {
		if ((rc = write_dword(info, dp, src)) != 0) {
			return (rc);
		}
		dp  += 8;
		src += 8;
		cc -= 8;
	}

	if (cc <= 0) {
		return (0);
	}

	/*
	 * handle unaligned tail bytes
	 */
	for (i = 0; i < 8; i++) {
		bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
	}
	return (write_dword(info, dp, bb));
}

/*-----------------------------------------------------------------------
 * Write a dword to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
{
	ulong start;
	ulong cl = 0, ch =0;
	int flag, i;

	for (ch=0, i=0; i < 4; i++)
		ch = (ch << 8) + *pdata++;	/* high word	*/
	for (cl=0, i=0; i < 4; i++)
		cl = (cl << 8) + *pdata++;	/* low word	*/

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_long *)dest) & ch)	!= ch
	    ||(*((vu_long *)(dest + 4)) & cl)	!= cl)
	{
		return (2);
	}

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

	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
	V_ULONG( dest ) = ch;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
	V_ULONG( dest + 4 ) = cl;

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

	/* data polling for D7 */
	start = get_timer (0);
	while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
	       ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2001, 2002
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* (C) Copyright 2002
	6	* Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
	7	*
	8	* Flash Routines for AMD device AM29DL323DB on the EP8260 board.
	9	*
	10	* This file is based on board/tqm8260/flash.c.
	11	*--------------------------------------------------------------------
	12	* See file CREDITS for list of people who contributed to this
	13	* project.
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License as
	17	* published by the Free Software Foundation; either version 2 of
	18	* the License, or (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	28	* MA 02111-1307 USA
	29	*/
	30
	31	#include <common.h>
	32	#include <mpc8xx.h>
	33
	34	#define V_ULONG(a) ((volatile unsigned long )( a ))
	35	#define V_BYTE(a) ((volatile unsigned char )( a ))
	36
	37
6d0f6bcf	38	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
affae2bf WD	39
	40
	41	/*-----------------------------------------------------------------------
	42	*/
	43	void flash_reset(void)
	44	{
9dd611b8 WD	45	if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
	46	V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
	47	V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
	48	}
affae2bf WD	49	}
	50
	51	/*-----------------------------------------------------------------------
	52	*/
	53	ulong flash_get_size( ulong baseaddr, flash_info_t *info )
	54	{
9dd611b8 WD	55	short i;
	56	unsigned long flashtest_h, flashtest_l;
	57
	58	/* Write auto select command sequence and test FLASH answer */
	59	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	60	V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
	61	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
	62	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	63	V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
	64	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
	65
	66	flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */
	67	flashtest_l = V_ULONG(baseaddr + 4);
	68
	69	if ((int)flashtest_h == AMD_MANUFACT) {
	70	info->flash_id = FLASH_MAN_AMD;
	71	} else {
	72	info->flash_id = FLASH_UNKNOWN;
	73	info->sector_count = 0;
	74	info->size = 0;
53677ef1	75	return (0); /* no or unknown flash */
9dd611b8 WD	76	}
	77
	78	flashtest_h = V_ULONG(baseaddr + 8); /* device ID */
	79	flashtest_l = V_ULONG(baseaddr + 12);
	80	if (flashtest_h != flashtest_l) {
	81	info->flash_id = FLASH_UNKNOWN;
	82	return(0);
	83	}
	84
	85	switch((int)flashtest_h) {
	86	case AMD_ID_DL323B:
	87	info->flash_id += FLASH_AMDL323B;
	88	info->sector_count = 71;
	89	info->size = 0x01000000; /* 4 * 4 MB = 16 MB */
	90	break;
	91	case AMD_ID_LV640U: /* AMDLV640 and AMDLV641 have same ID */
	92	info->flash_id += FLASH_AMLV640U;
	93	info->sector_count = 128;
53677ef1	94	info->size = 0x02000000; /* 4 * 8 MB = 32 MB */
9dd611b8 WD	95	break;
	96	default:
	97	info->flash_id = FLASH_UNKNOWN;
53677ef1	98	return(0); /* no or unknown flash */
9dd611b8 WD	99	}
	100
	101	if(flashtest_h == AMD_ID_LV640U) {
	102	/* set up sector start adress table (uniform sector type) */
	103	for (i = 0; i < info->sector_count; i++)
	104	info->start[i] = baseaddr + (i * 0x00040000);
	105	} else {
	106	/* set up sector start adress table (bottom sector type) */
	107	for (i = 0; i < 8; i++) {
	108	info->start[i] = baseaddr + (i * 0x00008000);
	109	}
	110	for (i = 8; i < info->sector_count; i++) {
	111	info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
	112	}
	113	}
	114	/* check for protected sectors */
	115	for (i = 0; i < info->sector_count; i++) {
	116	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	117	if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) \|\|
	118	(V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
	119	info->protect[i] = 1; /* D0 = 1 if protected */
	120	} else {
	121	info->protect[i] = 0;
	122	}
	123	}
	124
	125	flash_reset();
	126	return(info->size);
affae2bf WD	127	}
	128
	129	/*-----------------------------------------------------------------------
	130	*/
	131	unsigned long flash_init (void)
	132	{
9dd611b8 WD	133	unsigned long size_b0 = 0;
9dd611b8 WD	134	int i;
affae2bf	135
9dd611b8	136	/* Init: no FLASHes known */
6d0f6bcf	137	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
9dd611b8 WD	138	flash_info[i].flash_id = FLASH_UNKNOWN;
9dd611b8 WD	139	}
affae2bf	140
9dd611b8	141	/* Static FLASH Bank configuration here (only one bank) */
affae2bf	142
6d0f6bcf	143	size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
9dd611b8 WD	144	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size_b0 == 0) {
	145	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	146	size_b0, size_b0>>20);
	147	}
affae2bf	148
9dd611b8 WD	149	/*
	150	* protect monitor and environment sectors
	151	*/
affae2bf	152
6d0f6bcf	153	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
9dd611b8	154	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	155	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	156	CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
9dd611b8	157	&flash_info[0]);
affae2bf WD	158	#endif
affae2bf WD	159
0e8d1586 JCPV	160	#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
	161	# ifndef CONFIG_ENV_SIZE
	162	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
affae2bf	163	# endif
9dd611b8	164	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	165	CONFIG_ENV_ADDR,
0e8d1586 JCPV	166	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
9dd611b8	167	&flash_info[0]);
affae2bf WD	168	#endif
affae2bf WD	169
9dd611b8	170	return (size_b0);
affae2bf WD	171	}
	172
	173	/*-----------------------------------------------------------------------
	174	*/
	175	void flash_print_info (flash_info_t *info)
	176	{
9dd611b8	177	int i;
affae2bf	178
9dd611b8 WD	179	if (info->flash_id == FLASH_UNKNOWN) {
	180	printf ("missing or unknown FLASH type\n");
	181	return;
	182	}
affae2bf	183
9dd611b8 WD	184	switch ((info->flash_id >> 16) & 0xff) {
	185	case FLASH_MAN_AMD: printf ("AMD "); break;
	186	default: printf ("Unknown Vendor "); break;
	187	}
affae2bf	188
9dd611b8 WD	189	switch (info->flash_id & FLASH_TYPEMASK) {
9dd611b8 WD	190	case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n");
affae2bf	191	break;
9dd611b8	192	case FLASH_AMLV640U: printf ("29LV640U (64 M, uniform sector)\n");
affae2bf	193	break;
9dd611b8 WD	194	default: printf ("Unknown Chip Type\n");
	195	break;
	196	}
	197
	198	printf (" Size: %ld MB in %d Sectors\n",
	199	info->size >> 20, info->sector_count);
	200
	201	printf (" Sector Start Addresses:");
	202	for (i=0; i<info->sector_count; ++i) {
	203	if ((i % 5) == 0)
	204	printf ("\n ");
	205	printf (" %08lX%s",
	206	info->start[i],
	207	info->protect[i] ? " (RO)" : " "
	208	);
	209	}
	210	printf ("\n");
	211	return;
affae2bf WD	212	}
	213
	214	/*-----------------------------------------------------------------------
	215	*/
	216	int flash_erase (flash_info_t *info, int s_first, int s_last)
	217	{
9dd611b8 WD	218	int flag, prot, sect, l_sect;
	219	ulong start, now, last;
	220
	221	if ((s_first < 0) \|\| (s_first > s_last)) {
	222	if (info->flash_id == FLASH_UNKNOWN) {
	223	printf ("- missing\n");
	224	} else {
	225	printf ("- no sectors to erase\n");
	226	}
	227	return 1;
	228	}
affae2bf	229
9dd611b8 WD	230	prot = 0;
	231	for (sect = s_first; sect <= s_last; sect++) {
	232	if (info->protect[sect])
	233	prot++;
affae2bf	234	}
9dd611b8 WD	235
	236	if (prot) {
	237	printf ("- Warning: %d protected sectors will not be erased!\n",
	238	prot);
	239	} else {
	240	printf ("\n");
affae2bf	241	}
9dd611b8 WD	242
	243	l_sect = -1;
	244
	245	/* Disable interrupts which might cause a timeout here */
	246	flag = disable_interrupts();
	247
	248	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	249	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	250	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
	251	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	252	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	253	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	254	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	255	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
	256	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	257	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	258	udelay (1000);
	259
	260	/* Start erase on unprotected sectors */
	261	for (sect = s_first; sect<=s_last; sect++) {
	262	if (info->protect[sect] == 0) { /* not protected */
	263	V_ULONG( info->start[sect] ) = 0x00300030;
	264	V_ULONG( info->start[sect] + 4 ) = 0x00300030;
	265	l_sect = sect;
	266	}
affae2bf	267	}
9dd611b8 WD	268
	269	/* re-enable interrupts if necessary */
	270	if (flag)
	271	enable_interrupts();
	272
	273	/* wait at least 80us - let's wait 1 ms */
	274	udelay (1000);
	275
	276	/*
	277	* We wait for the last triggered sector
	278	*/
	279	if (l_sect < 0)
	280	goto DONE;
	281
	282	start = get_timer (0);
	283	last = start;
	284	while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 \|\|
	285	(V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
	286	{
6d0f6bcf	287	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
9dd611b8 WD	288	printf ("Timeout\n");
	289	return 1;
	290	}
	291	/* show that we're waiting */
	292	if ((now - last) > 1000) { /* every second */
	293	serial_putc ('.');
	294	last = now;
	295	}
affae2bf	296	}
affae2bf	297
9dd611b8 WD	298	DONE:
	299	/* reset to read mode */
	300	flash_reset ();
affae2bf	301
9dd611b8 WD	302	printf (" done\n");
9dd611b8 WD	303	return 0;
affae2bf WD	304	}
	305
	306	static int write_dword (flash_info_t , ulong, unsigned char );
	307
	308	/*-----------------------------------------------------------------------
	309	* Copy memory to flash, returns:
	310	* 0 - OK
	311	* 1 - write timeout
	312	* 2 - Flash not erased
	313	*/
	314
	315	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	316	{
9dd611b8 WD	317	ulong dp;
	318	static unsigned char bb[8];
	319	int i, l, rc, cc = cnt;
	320
	321	dp = (addr & ~7); /* get lower dword aligned address */
	322
	323	/*
	324	* handle unaligned start bytes
	325	*/
	326	if ((l = addr - dp) != 0) {
	327	for (i = 0; i < 8; i++)
	328	bb[i] = (i < l \|\| (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
	329	if ((rc = write_dword(info, dp, bb)) != 0)
	330	{
	331	return (rc);
	332	}
	333	dp += 8;
	334	cc -= 8 - l;
	335	}
	336
	337	/*
	338	* handle word aligned part
	339	*/
	340	while (cc >= 8) {
	341	if ((rc = write_dword(info, dp, src)) != 0) {
	342	return (rc);
	343	}
	344	dp += 8;
	345	src += 8;
	346	cc -= 8;
affae2bf	347	}
9dd611b8 WD	348
	349	if (cc <= 0) {
	350	return (0);
affae2bf	351	}
affae2bf	352
9dd611b8 WD	353	/*
	354	* handle unaligned tail bytes
	355	*/
	356	for (i = 0; i < 8; i++) {
	357	bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
	358	}
	359	return (write_dword(info, dp, bb));
affae2bf WD	360	}
	361
	362	/*-----------------------------------------------------------------------
	363	* Write a dword to Flash, returns:
	364	* 0 - OK
	365	* 1 - write timeout
	366	* 2 - Flash not erased
	367	*/
	368	static int write_dword (flash_info_t info, ulong dest, unsigned char pdata)
	369	{
9dd611b8 WD	370	ulong start;
	371	ulong cl = 0, ch =0;
	372	int flag, i;
	373
	374	for (ch=0, i=0; i < 4; i++)
	375	ch = (ch << 8) + pdata++; / high word */
	376	for (cl=0, i=0; i < 4; i++)
	377	cl = (cl << 8) + pdata++; / low word */
	378
	379	/* Check if Flash is (sufficiently) erased */
	380	if ((((vu_long )dest) & ch) != ch
	381	\|\|(((vu_long )(dest + 4)) & cl) != cl)
	382	{
	383	return (2);
affae2bf	384	}
9dd611b8 WD	385
	386	/* Disable interrupts which might cause a timeout here */
	387	flag = disable_interrupts();
	388
	389	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	390	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	391	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
	392	V_ULONG( dest ) = ch;
	393	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	394	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	395	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
	396	V_ULONG( dest + 4 ) = cl;
	397
	398	/* re-enable interrupts if necessary */
	399	if (flag)
	400	enable_interrupts();
	401
	402	/* data polling for D7 */
	403	start = get_timer (0);
	404	while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) \|\|
	405	((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
6d0f6bcf	406	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
9dd611b8 WD	407	return (1);
	408	}
	409	}
	410	return (0);
affae2bf	411	}