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

/*
 * (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 <mpc8xx.h>

#ifndef	CONFIG_ENV_ADDR
#define CONFIG_ENV_ADDR	(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
#endif

#define CONFIG_FLASH_16BIT

flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);

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

unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)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((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);

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


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

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

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

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

	flash_info[0].size = size_b0;

	return (size_b0);
}

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

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:	printf ("AMD ");		break;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
				break;
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	printf ("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i=0; i<info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			info->protect[i] ? " (RO)" : "     "
		);
	}
	printf ("\n");
	return;
}

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


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

/*
 * The following code cannot be run from FLASH!
 */

static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
	short i;
	ulong value;
	ulong base = (ulong)addr;

	/* Write auto select command: read Manufacturer ID */
	vu_short *s_addr=(vu_short*)addr;
	s_addr[0x5555] = 0x00AA;
	s_addr[0x2AAA] = 0x0055;
	s_addr[0x5555] = 0x0090;

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

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

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

		switch (value) {
	case FUJI_ID_29F800BA:
		info->flash_id += FLASH_AM400T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/
	case AMD_ID_LV800T:
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/
	case AMD_ID_LV800B:
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */
	}

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


	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		/* D0 = 1 if protected */
		s_addr = (volatile unsigned short *)(info->start[i]);
		info->protect[i] = s_addr[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		s_addr = (volatile unsigned short *)info->start[0];
		*s_addr = 0x00F0;	/* reset bank */
	}
	return (info->size);
}


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


int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	vu_long *addr = (vu_long*)(info->start[0]);
	int flag, prot, sect;
	ulong start, now, last;
#ifdef CONFIG_FLASH_16BIT
	vu_short *s_addr = (vu_short*)addr;
#endif

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}
/*#ifndef CONFIG_FLASH_16BIT
	ulong type;
	type = (info->flash_id & FLASH_VENDMASK);
	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		return;
	}
#endif*/
	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
		if (info->protect[sect]) {
			prot++;
		}
	}

	if (prot) {
		printf ("- Warning: %d protected sectors will not be erased!\n",
			prot);
	} else {
		printf ("\n");
	}

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

#ifdef CONFIG_FLASH_16BIT

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

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

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

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

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


/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3);	/* get lower word aligned address */

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

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

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i=0; i<4; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 4;
		cnt -= 4;
	}

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

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

	return (write_word(info, wp, data));
}


/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
	vu_long *addr = (vu_long*)(info->start[0]);

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

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

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

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

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

	*((vu_short *)dest) = high_data;


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

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


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

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

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

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

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

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

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

		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
56f94be3	1	/*
0608e04d	2	* (C) Copyright 2000-2004
56f94be3 WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <mpc8xx.h>
	26
0e8d1586	27	#ifndef CONFIG_ENV_ADDR
6d0f6bcf	28	#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
56f94be3 WD	29	#endif
	30
	31	#define CONFIG_FLASH_16BIT
	32
6d0f6bcf	33	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
56f94be3 WD	34
	35	/*-----------------------------------------------------------------------
	36	* Functions
	37	*/
	38	static ulong flash_get_size (vu_long addr, flash_info_t info);
	39	static int write_word (flash_info_t *info, ulong dest, ulong data);
	40
	41	/*-----------------------------------------------------------------------
	42	*/
	43
	44	unsigned long flash_init (void)
	45	{
6d0f6bcf	46	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR;
56f94be3 WD	47	volatile memctl8xx_t *memctl = &immap->im_memctl;
	48	unsigned long size_b0;
	49	int i;
	50
	51	/* Init: no FLASHes known */
6d0f6bcf	52	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
56f94be3 WD	53	flash_info[i].flash_id = FLASH_UNKNOWN;
	54	}
	55
	56	/* Static FLASH Bank configuration here - FIXME XXX */
	57
	58	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
	59
	60	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	61	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	62	size_b0, size_b0<<20);
	63	}
	64
	65
	66	/* Remap FLASH according to real size */
6d0f6bcf JCPV	67	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH \| (-size_b0 & OR_AM_MSK);
6d0f6bcf JCPV	68	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V \| BR_PS_16;
56f94be3 WD	69
56f94be3 WD	70	/* Re-do sizing to get full correct info */
6d0f6bcf	71	size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
56f94be3	72
6d0f6bcf	73	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
56f94be3 WD	74	/* monitor protection ON by default */
56f94be3 WD	75	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	76	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	77	CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
56f94be3 WD	78	&flash_info[0]);
	79	#endif
	80
5a1aceb0	81	#ifdef CONFIG_ENV_IS_IN_FLASH
56f94be3 WD	82	/* ENV protection ON by default */
56f94be3 WD	83	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	84	CONFIG_ENV_ADDR,
0e8d1586 JCPV	85	CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
56f94be3 WD	86	&flash_info[0]);
	87	#endif
	88
	89	flash_info[0].size = size_b0;
	90
	91	return (size_b0);
	92	}
	93
	94	/*-----------------------------------------------------------------------
	95	*/
	96	void flash_print_info (flash_info_t *info)
	97	{
	98	int i;
	99
	100	if (info->flash_id == FLASH_UNKNOWN) {
	101	printf ("missing or unknown FLASH type\n");
	102	return;
	103	}
	104
	105	switch (info->flash_id & FLASH_VENDMASK) {
	106	case FLASH_MAN_AMD: printf ("AMD "); break;
	107	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	108	default: printf ("Unknown Vendor "); break;
	109	}
	110
	111	switch (info->flash_id & FLASH_TYPEMASK) {
	112	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	113	break;
	114	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	115	break;
	116	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	117	break;
	118	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	119	break;
	120	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	121	break;
	122	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	123	break;
	124	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	125	break;
	126	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	127	break;
	128	default: printf ("Unknown Chip Type\n");
	129	break;
	130	}
	131
	132	printf (" Size: %ld MB in %d Sectors\n",
	133	info->size >> 20, info->sector_count);
	134
	135	printf (" Sector Start Addresses:");
	136	for (i=0; i<info->sector_count; ++i) {
	137	if ((i % 5) == 0)
	138	printf ("\n ");
	139	printf (" %08lX%s",
	140	info->start[i],
	141	info->protect[i] ? " (RO)" : " "
	142	);
	143	}
	144	printf ("\n");
	145	return;
	146	}
	147
	148	/*-----------------------------------------------------------------------
	149	*/
150
151
152	/*-----------------------------------------------------------------------
153	*/
154
155	/*
156	* The following code cannot be run from FLASH!
157	*/
158
159	static ulong flash_get_size (vu_long addr, flash_info_t info)
160	{
161	short i;
162	ulong value;
163	ulong base = (ulong)addr;
164
165	/* Write auto select command: read Manufacturer ID */
166	vu_short s_addr=(vu_short)addr;
167	s_addr[0x5555] = 0x00AA;
168	s_addr[0x2AAA] = 0x0055;
169	s_addr[0x5555] = 0x0090;
170
171	value = s_addr[0];
172	value = value\|(value<<16);
173
174	switch (value) {
682011ff WD	175	case AMD_MANUFACT:
	176	info->flash_id = FLASH_MAN_AMD;
	177	break;
56f94be3 WD	178	case FUJ_MANUFACT:
	179	info->flash_id = FLASH_MAN_FUJ;
	180	break;
	181	default:
	182	info->flash_id = FLASH_UNKNOWN;
	183	info->sector_count = 0;
	184	info->size = 0;
	185	return (0); /* no or unknown flash */
	186	}
	187
	188	value = s_addr[1];
	189	value = value\|(value<<16);
	190
	191	switch (value) {
	192	case FUJI_ID_29F800BA:
	193	info->flash_id += FLASH_AM400T;
	194	info->sector_count = 19;
	195	info->size = 0x00100000;
	196	break; /* => 1 MB */
682011ff WD	197	case AMD_ID_LV800T:
	198	info->flash_id += FLASH_AM800T;
	199	info->sector_count = 19;
0608e04d WD	200	info->size = 0x00100000;
0608e04d WD	201	break; /* => 1 MB */
682011ff WD	202	case AMD_ID_LV800B:
	203	info->flash_id += FLASH_AM800B;
	204	info->sector_count = 19;
0608e04d WD	205	info->size = 0x00100000;
0608e04d WD	206	break; /* => 1 MB */
56f94be3 WD	207	default:
	208	info->flash_id = FLASH_UNKNOWN;
	209	return (0); /* => no or unknown flash */
	210	}
	211
	212	/* set up sector start address table */
	213	/* set sector offsets for bottom boot block type */
	214	info->start[0] = base + 0x00000000;
	215	info->start[1] = base + 0x00004000;
	216	info->start[2] = base + 0x00006000;
	217	info->start[3] = base + 0x00008000;
	218	for (i = 4; i < info->sector_count; i++) {
	219	info->start[i] = base + (i * 0x00010000) - 0x00030000;
	220	}
	221
	222
	223	/* check for protected sectors */
	224	for (i = 0; i < info->sector_count; i++) {
	225	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	226	/* D0 = 1 if protected */
	227	s_addr = (volatile unsigned short *)(info->start[i]);
	228	info->protect[i] = s_addr[2] & 1;
	229	}
	230
	231	/*
	232	* Prevent writes to uninitialized FLASH.
	233	*/
	234	if (info->flash_id != FLASH_UNKNOWN) {
	235	s_addr = (volatile unsigned short *)info->start[0];
	236	s_addr = 0x00F0; / reset bank */
	237	}
	238	return (info->size);
	239	}
	240
	241
	242	/*-----------------------------------------------------------------------
	243	*/
	244
	245
	246	int flash_erase (flash_info_t *info, int s_first, int s_last)
	247	{
	248	vu_long addr = (vu_long)(info->start[0]);
	249	int flag, prot, sect;
	250	ulong start, now, last;
	251	#ifdef CONFIG_FLASH_16BIT
	252	vu_short s_addr = (vu_short)addr;
	253	#endif
	254
	255	if ((s_first < 0) \|\| (s_first > s_last)) {
	256	if (info->flash_id == FLASH_UNKNOWN) {
	257	printf ("- missing\n");
	258	} else {
	259	printf ("- no sectors to erase\n");
	260	}
	261	return 1;
	262	}
	263	/*#ifndef CONFIG_FLASH_16BIT
	264	ulong type;
	265	type = (info->flash_id & FLASH_VENDMASK);
	266	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
	267	printf ("Can't erase unknown flash type %08lx - aborted\n",
	268	info->flash_id);
	269	return;
	270	}
271	#endif*/
272	prot = 0;
273	for (sect=s_first; sect<=s_last; ++sect) {
274	if (info->protect[sect]) {
275	prot++;
276	}
277	}
278
279	if (prot) {
280	printf ("- Warning: %d protected sectors will not be erased!\n",
281	prot);
282	} else {
283	printf ("\n");
284	}
285
286	start = get_timer (0);
287	last = start;
288	/* Start erase on unprotected sectors */
289	for (sect = s_first; sect<=s_last; sect++) {
290	if (info->protect[sect] == 0) { /* not protected */
291	#ifdef CONFIG_FLASH_16BIT
292	vu_short s_sect_addr = (vu_short)(info->start[sect]);
293	#else
294	vu_long sect_addr = (vu_long)(info->start[sect]);
295	#endif
296	/* Disable interrupts which might cause a timeout here */
297	flag = disable_interrupts();
298
299	#ifdef CONFIG_FLASH_16BIT
300
301	/printf("\ns_sect_addr=%x",s_sect_addr);/
302	s_addr[0x5555] = 0x00AA;
303	s_addr[0x2AAA] = 0x0055;
304	s_addr[0x5555] = 0x0080;
305	s_addr[0x5555] = 0x00AA;
306	s_addr[0x2AAA] = 0x0055;
307	s_sect_addr[0] = 0x0030;
308	#else
309	addr[0x5555] = 0x00AA00AA;
310	addr[0x2AAA] = 0x00550055;
311	addr[0x5555] = 0x00800080;
312	addr[0x5555] = 0x00AA00AA;
313	addr[0x2AAA] = 0x00550055;
314	sect_addr[0] = 0x00300030;
315	#endif
316	/* re-enable interrupts if necessary */
317	if (flag)
318	enable_interrupts();
319
320	/* wait at least 80us - let's wait 1 ms */
321	udelay (1000);
322
323	#ifdef CONFIG_FLASH_16BIT
324	while ((s_sect_addr[0] & 0x0080) != 0x0080) {
325	#else
326	while ((sect_addr[0] & 0x00800080) != 0x00800080) {
327	#endif
6d0f6bcf	328	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
56f94be3 WD	329	printf ("Timeout\n");
	330	return 1;
	331	}
	332	/* show that we're waiting */
	333	if ((now - last) > 1000) { /* every second */
	334	putc ('.');
	335	last = now;
	336	}
	337	}
	338	}
	339	}
	340
	341	/* reset to read mode */
	342	addr = (volatile unsigned long *)info->start[0];
	343	#ifdef CONFIG_FLASH_16BIT
	344	s_addr[0] = 0x00F0; /* reset bank */
	345	#else
	346	addr[0] = 0x00F000F0; /* reset bank */
	347	#endif
	348
	349	printf (" done\n");
	350	return 0;
	351	}
	352
	353
	354	/*-----------------------------------------------------------------------
	355	* Copy memory to flash, returns:
	356	* 0 - OK
	357	* 1 - write timeout
	358	* 2 - Flash not erased
	359	*/
	360
	361	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	362	{
	363	ulong cp, wp, data;
	364	int i, l, rc;
	365
	366	wp = (addr & ~3); /* get lower word aligned address */
	367
	368	/*
	369	* handle unaligned start bytes
	370	*/
	371	if ((l = addr - wp) != 0) {
	372	data = 0;
	373	for (i=0, cp=wp; i<l; ++i, ++cp) {
	374	data = (data << 8) \| ((uchar )cp);
	375	}
	376	for (; i<4 && cnt>0; ++i) {
	377	data = (data << 8) \| *src++;
	378	--cnt;
	379	++cp;
	380	}
	381	for (; cnt==0 && i<4; ++i, ++cp) {
	382	data = (data << 8) \| ((uchar )cp);
	383	}
	384
	385	if ((rc = write_word(info, wp, data)) != 0) {
	386	return (rc);
	387	}
	388	wp += 4;
	389	}
	390
	391	/*
	392	* handle word aligned part
393	*/
394	while (cnt >= 4) {
395	data = 0;
396	for (i=0; i<4; ++i) {
397	data = (data << 8) \| *src++;
398	}
399	if ((rc = write_word(info, wp, data)) != 0) {
400	return (rc);
401	}
402	wp += 4;
403	cnt -= 4;
404	}
405
406	if (cnt == 0) {
407	return (0);
408	}
409
410	/*
411	* handle unaligned tail bytes
412	*/
413	data = 0;
414	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
415	data = (data << 8) \| *src++;
416	--cnt;
417	}
418	for (; i<4; ++i, ++cp) {
419	data = (data << 8) \| ((uchar )cp);
420	}
421
422	return (write_word(info, wp, data));
423	}
424
425
426	/*-----------------------------------------------------------------------
427	* Write a word to Flash, returns:
428	* 0 - OK
429	* 1 - write timeout
430	* 2 - Flash not erased
431	*/
432	static int write_word (flash_info_t *info, ulong dest, ulong data)
433	{
434	vu_long addr = (vu_long)(info->start[0]);
435
436	#ifdef CONFIG_FLASH_16BIT
437	vu_short high_data;
438	vu_short low_data;
439	vu_short s_addr = (vu_short)addr;
440	#endif
441	ulong start;
442	int flag;
443
444	/* Check if Flash is (sufficiently) erased */
445	if ((((vu_long )dest) & data) != data) {
446	return (2);
447	}
448
449	#ifdef CONFIG_FLASH_16BIT
450	/* Write the 16 higher-bits */
451	/* Disable interrupts which might cause a timeout here */
452	flag = disable_interrupts();
453
454	high_data = ((data>>16) & 0x0000ffff);
455
456	s_addr[0x5555] = 0x00AA;
457	s_addr[0x2AAA] = 0x0055;
458	s_addr[0x5555] = 0x00A0;
459
460	((vu_short )dest) = high_data;
461
462
463	/* re-enable interrupts if necessary */
464	if (flag)
465	enable_interrupts();
466
467	/* data polling for D7 */
468	start = get_timer (0);
469	while ((((vu_short )dest) & 0x0080) != (high_data & 0x0080)) {
6d0f6bcf	470	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
56f94be3 WD	471	return (1);
	472	}
	473	}
	474
	475
	476	/* Write the 16 lower-bits */
	477	#endif
	478
	479	/* Disable interrupts which might cause a timeout here */
	480	flag = disable_interrupts();
	481	#ifdef CONFIG_FLASH_16BIT
	482	dest += 0x2;
	483	low_data = (data & 0x0000ffff);
	484
	485	s_addr[0x5555] = 0x00AA;
	486	s_addr[0x2AAA] = 0x0055;
	487	s_addr[0x5555] = 0x00A0;
	488	((vu_short )dest) = low_data;
	489
	490	#else
	491	addr[0x5555] = 0x00AA00AA;
	492	addr[0x2AAA] = 0x00550055;
	493	addr[0x5555] = 0x00A000A0;
	494	((vu_long )dest) = data;
	495	#endif
	496
	497	/* re-enable interrupts if necessary */
	498	if (flag)
	499	enable_interrupts();
	500
	501	/* data polling for D7 */
	502	start = get_timer (0);
	503
	504	#ifdef CONFIG_FLASH_16BIT
	505	while ((((vu_short )dest) & 0x0080) != (low_data & 0x0080)) {
	506	#else
	507	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
	508	#endif
	509
6d0f6bcf	510	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
56f94be3 WD	511	return (1);
	512	}
	513	}
	514	return (0);
	515	}