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

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 * (C) Copyright 2001-2003
 *
 * Changes for MATRIX Vision mvBLUE devices
 * MATRIX Vision GmbH / hg,as info@matrix-vision.de
 *
 * 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 <mpc824x.h>

#if 0
	#define mvdebug(p) printf ##p
#else
	#define mvdebug(p)
#endif

flash_info_t	flash_info[CFG_MAX_FLASH_BANKS];

#define FLASH_BUS_WIDTH		8

#if (FLASH_BUS_WIDTH==32)
	#define FLASH_DATA_MASK 0xffffffff
	#define FLASH_SHIFT 1
	#define FDT	vu_long
#elif (FLASH_BUS_WIDTH==16)
	#define FLASH_DATA_MASK 0xff
	#define FLASH_SHIFT 0
	#define FDT	vu_short
#elif (FLASH_BUS_WIDTH==8)
	#define FLASH_DATA_MASK 0xff
	#define FLASH_SHIFT 0
	#define FDT	vu_char
#else
	#error FLASH_BUS_WIDTH undefined
#endif

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *address, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);

/*-----------------------------------------------------------------------
 */
unsigned long flash_init (void)
{
	unsigned long size_b0;
	int i;

	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	size_b0 = flash_get_size((vu_long *)0xffc00000, &flash_info[0]);

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

	flash_get_offsets (0xffc00000, &flash_info[0]);
	flash_info[0].size = size_b0;

	/* monitor protection OFF by default */
	flash_protect ( FLAG_PROTECT_CLEAR, 0xffc00000, 0x2000, flash_info );

	return size_b0;
}

/*-----------------------------------------------------------------------
 */
static void flash_get_offsets (ulong base, flash_info_t *info)
{
	int i;

	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE)
	{	/* bottom boot sector types - these are the useful ones! */
		/* set sector offsets for bottom boot block type */
		if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B)
		{	/* AMDLV320B has 8 x 8k bottom boot sectors */
			for (i = 0; i < 8; i++)												/* +8k		*/
				info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
			for (; i < info->sector_count; i++)									/* +64k		*/
				info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00070000 << FLASH_SHIFT);
		}
		else
		{	/* other types have 4 bottom boot sectors (16,8,8,32) */
			i = 0;
			info->start[i++] = base +  0x00000000;								/* -		*/
			info->start[i++] = base + (0x00004000 << FLASH_SHIFT);				/* +16k		*/
			info->start[i++] = base + (0x00006000 << FLASH_SHIFT);				/* +8k		*/
			info->start[i++] = base + (0x00008000 << FLASH_SHIFT);				/* +8k		*/
			info->start[i++] = base + (0x00010000 << FLASH_SHIFT);				/* +32k		*/
			for (; i < info->sector_count; i++)									/* +64k		*/
				info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00030000 << FLASH_SHIFT);
		}
	}
	else
	{	/* top boot sector types - not so useful */
		/* set sector offsets for top boot block type */
		if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T)
		{	/* AMDLV320T has 8 x 8k top boot sectors */
			for (i = 0; i < info->sector_count - 8; i++)						/* +64k		*/
				info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
			for (; i < info->sector_count; i++)									/* +8k		*/
				info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
		}
		else
		{	/* other types have 4 top boot sectors (32,8,8,16) */
			for (i = 0; i < info->sector_count - 4; i++)						/* +64k		*/
				info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));

			info->start[i++] = base + info->size - (0x00010000 << FLASH_SHIFT);	/* -32k		*/
			info->start[i++] = base + info->size - (0x00008000 << FLASH_SHIFT);	/* -8k		*/
			info->start[i++] = base + info->size - (0x00006000 << FLASH_SHIFT);	/* -8k		*/
			info->start[i]   = base + info->size - (0x00004000 << FLASH_SHIFT);	/* -16k		*/
		}
	}
}

/*-----------------------------------------------------------------------
 */
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;
	case FLASH_MAN_STM:	printf ("ST ");			break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	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;
	case FLASH_STMW320DB:	printf ("M29W320B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_STMW320DT:	printf ("M29W320T (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");
}

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

#define	AMD_ID_LV160T_MVS	(AMD_ID_LV160T & FLASH_DATA_MASK)
#define AMD_ID_LV160B_MVS	(AMD_ID_LV160B & FLASH_DATA_MASK)
#define AMD_ID_LV320T_MVS	(AMD_ID_LV320T & FLASH_DATA_MASK)
#define AMD_ID_LV320B_MVS	(AMD_ID_LV320B & FLASH_DATA_MASK)
#define STM_ID_W320DT_MVS	(STM_ID_29W320DT & FLASH_DATA_MASK)
#define STM_ID_W320DB_MVS	(STM_ID_29W320DB & FLASH_DATA_MASK)
#define AMD_MANUFACT_MVS	(AMD_MANUFACT  & FLASH_DATA_MASK)
#define FUJ_MANUFACT_MVS	(FUJ_MANUFACT  & FLASH_DATA_MASK)
#define STM_MANUFACT_MVS	(STM_MANUFACT  & FLASH_DATA_MASK)

#if (FLASH_BUS_WIDTH >= 16)
	#define AUTOSELECT_ADDR1	0x0555
	#define AUTOSELECT_ADDR2	0x02AA
	#define AUTOSELECT_ADDR3	AUTOSELECT_ADDR1
#else
	#define AUTOSELECT_ADDR1	0x0AAA
	#define AUTOSELECT_ADDR2	0x0555
	#define AUTOSELECT_ADDR3	AUTOSELECT_ADDR1
#endif

#define AUTOSELECT_DATA1	(0x00AA00AA & FLASH_DATA_MASK)
#define AUTOSELECT_DATA2	(0x00550055 & FLASH_DATA_MASK)
#define AUTOSELECT_DATA3	(0x00900090 & FLASH_DATA_MASK)

#define RESET_BANK_DATA		(0x00F000F0 & FLASH_DATA_MASK)


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

	ulong base = (ulong)address;
	addr[AUTOSELECT_ADDR1] = AUTOSELECT_DATA1;
	addr[AUTOSELECT_ADDR2] = AUTOSELECT_DATA2;
	addr[AUTOSELECT_ADDR3] = AUTOSELECT_DATA3;
	__asm__ __volatile__("sync");

	udelay(180);

	value = addr[0];			/* manufacturer ID	*/
	switch (value) {
	case AMD_MANUFACT_MVS:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case FUJ_MANUFACT_MVS:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case STM_MANUFACT_MVS:
		info->flash_id = FLASH_MAN_STM;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}
#if (FLASH_BUS_WIDTH >= 16)
	value = addr[1];			/* device ID		*/
#else
	value = addr[2];			/* device ID		*/
#endif

	switch (value) {
	case AMD_ID_LV160T_MVS:
		info->flash_id += FLASH_AM160T;
		info->sector_count = 37;
		info->size = (0x00200000 << FLASH_SHIFT);
		break;				/* => 2 or 4 MB		*/

	case AMD_ID_LV160B_MVS:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 37;
		info->size = (0x00200000 << FLASH_SHIFT);
		break;				/* => 2 or 4 MB		*/

	case AMD_ID_LV320T_MVS:
		info->flash_id += FLASH_AM320T;
		info->sector_count = 71;
		info->size = (0x00400000 << FLASH_SHIFT);
		break;				/* => 4 or 8 MB		*/

	case AMD_ID_LV320B_MVS:
		info->flash_id += FLASH_AM320B;
		info->sector_count = 71;
		info->size = (0x00400000 << FLASH_SHIFT);
		break;				/* => 4 or 8MB		*/

	case STM_ID_W320DT_MVS:
		info->flash_id += FLASH_STMW320DT;
		info->sector_count = 67;
		info->size = (0x00400000 << FLASH_SHIFT);
		break;				/* => 4 or 8 MB		*/

	case STM_ID_W320DB_MVS:
		info->flash_id += FLASH_STMW320DB;
		info->sector_count = 67;
		info->size = (0x00400000 << FLASH_SHIFT);
		break;				/* => 4 or 8MB		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}

	/* set up sector start address table */
	flash_get_offsets (base, info);

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

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr = (FDT *)info->start[0];
		*addr = RESET_BANK_DATA;	/* reset bank */
	}
	return (info->size);
}


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

#if (FLASH_BUS_WIDTH >= 16)
	#define ERASE_ADDR1 0x0555
	#define ERASE_ADDR2 0x02AA
#else
	#define ERASE_ADDR1 0x0AAA
	#define ERASE_ADDR2 0x0555
#endif

#define ERASE_ADDR3 ERASE_ADDR1
#define ERASE_ADDR4 ERASE_ADDR1
#define ERASE_ADDR5 ERASE_ADDR2

#define ERASE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
#define ERASE_DATA2 (0x00550055 & FLASH_DATA_MASK)
#define ERASE_DATA3 (0x00800080 & FLASH_DATA_MASK)
#define ERASE_DATA4 ERASE_DATA1
#define ERASE_DATA5 ERASE_DATA2

#define ERASE_SECTOR_DATA	(0x00300030 & FLASH_DATA_MASK)
#define ERASE_CHIP_DATA		(0x00100010 & FLASH_DATA_MASK)
#define ERASE_CONFIRM_DATA	(0x00800080 & FLASH_DATA_MASK)

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	FDT *addr = (FDT *)(info->start[0]);

	int prot, sect, l_sect, flag;
	ulong start, now, last;

	__asm__ __volatile__ ("sync");
	addr[0] = 0xf0;
	udelay(1000);

	printf("\nflash_erase: first = %d @ 0x%08lx\n", s_first, info->start[s_first] );
	printf("             last  = %d @ 0x%08lx\n", s_last , info->start[s_last ] );

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}

	if ((info->flash_id == FLASH_UNKNOWN) || (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
		return 1;
	}

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

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

	l_sect = -1;

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

	addr[ERASE_ADDR1] = ERASE_DATA1;
	addr[ERASE_ADDR2] = ERASE_DATA2;
	addr[ERASE_ADDR3] = ERASE_DATA3;
	addr[ERASE_ADDR4] = ERASE_DATA4;
	addr[ERASE_ADDR5] = ERASE_DATA5;

	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {
			addr = (FDT *)(info->start[sect]);
			addr[0] = ERASE_SECTOR_DATA;
			l_sect = sect;
		}
	}

	if (flag)
		enable_interrupts();

	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;

	start = get_timer (0);
	last  = start;
	addr = (FDT *)(info->start[l_sect]);

	while ((addr[0] & ERASE_CONFIRM_DATA) != ERASE_CONFIRM_DATA) {
		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc ('.');
			last = now;
		}
	}

DONE:
	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)
{
#define BUFF_INC 4
	ulong cp, wp, data;
	int i, l, rc;

	mvdebug (("+write_buff %p ==> 0x%08lx, count = 0x%08lx\n", src, addr, cnt));

	wp = (addr & ~3);	/* get lower word aligned address */
	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		mvdebug ((" handle unaligned start bytes (cnt = 0x%08lx)\n", cnt));
		data = 0;
		for (i=0, cp=wp; i<l; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}
		for (; i<BUFF_INC && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<BUFF_INC; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

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

	/*
	 * handle (half)word aligned part
	 */
	mvdebug ((" handle word aligned part (cnt = 0x%08lx)\n", cnt));
	while (cnt >= BUFF_INC) {
		data = 0;
		for (i=0; i<BUFF_INC; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += BUFF_INC;
		cnt -= BUFF_INC;
	}

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

	/*
	 * handle unaligned tail bytes
	 */
	mvdebug ((" handle unaligned tail bytes (cnt = 0x%08lx)\n", cnt));
	data = 0;
	for (i=0, cp=wp; i<BUFF_INC && cnt>0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i<BUFF_INC; ++i, ++cp) {
		data = (data << 8) | (*(uchar *)cp);
	}

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

#if (FLASH_BUS_WIDTH >= 16)
	#define WRITE_ADDR1 0x0555
	#define WRITE_ADDR2 0x02AA
#else
	#define WRITE_ADDR1 0x0AAA
	#define WRITE_ADDR2 0x0555
	#define WRITE_ADDR3 WRITE_ADDR1
#endif

#define WRITE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
#define WRITE_DATA2 (0x00550055 & FLASH_DATA_MASK)
#define WRITE_DATA3 (0x00A000A0 & FLASH_DATA_MASK)

#define WRITE_CONFIRM_DATA ERASE_CONFIRM_DATA

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

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_char *)dest) & data) != data) {
		printf(" *** ERROR: Flash not erased !\n");
		return (2);
	}
	flag = disable_interrupts();

	addr[WRITE_ADDR1] = WRITE_DATA1;
	addr[WRITE_ADDR2] = WRITE_DATA2;
	addr[WRITE_ADDR3] = WRITE_DATA3;
	*((vu_char *)dest) = data;

	if (flag)
		enable_interrupts();

	/* data polling for D7 */
	start = get_timer (0);
	addr = (vu_char *)dest;
	while (( (*addr) & WRITE_CONFIRM_DATA) != (data & WRITE_CONFIRM_DATA)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			printf(" *** ERROR: Flash write timeout !");
			return (1);
		}
	}
	mvdebug (("-write_byte\n"));
	return (0);
}

/*-----------------------------------------------------------------------
 * 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)
{
	int i,
		result = 0;

	mvdebug (("+write_word : 0x%08lx @ 0x%08lx\n", data, dest));
	for ( i=0; (i < 4) && (result == 0); i++, dest+=1 )
		result = write_char (info, dest, (data >> (8*(3-i))) & 0xff );
	mvdebug (("-write_word\n"));
	return result;
}
/*---------------------------------------------------------------- */
Commit	Line	Data
b4676a25 WD	1	/*
	2	* (C) Copyright 2000
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	* (C) Copyright 2001-2003
	5	*
	6	* Changes for MATRIX Vision mvBLUE devices
	7	* MATRIX Vision GmbH / hg,as info@matrix-vision.de
	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	#include <mpc824x.h>
	27
	28	#if 0
	29	#define mvdebug(p) printf ##p
	30	#else
	31	#define mvdebug(p)
	32	#endif
	33
	34	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	35
	36	#define FLASH_BUS_WIDTH 8
	37
	38	#if (FLASH_BUS_WIDTH==32)
	39	#define FLASH_DATA_MASK 0xffffffff
	40	#define FLASH_SHIFT 1
	41	#define FDT vu_long
	42	#elif (FLASH_BUS_WIDTH==16)
	43	#define FLASH_DATA_MASK 0xff
	44	#define FLASH_SHIFT 0
	45	#define FDT vu_short
	46	#elif (FLASH_BUS_WIDTH==8)
	47	#define FLASH_DATA_MASK 0xff
	48	#define FLASH_SHIFT 0
	49	#define FDT vu_char
	50	#else
	51	#error FLASH_BUS_WIDTH undefined
	52	#endif
	53
	54	/*-----------------------------------------------------------------------
	55	* Functions
	56	*/
	57	static ulong flash_get_size (vu_long address, flash_info_t info);
	58	static int write_word (flash_info_t *info, ulong dest, ulong data);
	59	static void flash_get_offsets (ulong base, flash_info_t *info);
	60
	61	/*-----------------------------------------------------------------------
	62	*/
	63	unsigned long flash_init (void)
	64	{
65	unsigned long size_b0;
66	int i;
67
68	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
69	flash_info[i].flash_id = FLASH_UNKNOWN;
70	}
71
72	size_b0 = flash_get_size((vu_long *)0xffc00000, &flash_info[0]);
73
74	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
75	printf ("## Unknown FLASH : Size = 0x%08lx = %ld MB\n",
76	size_b0, size_b0<<20);
77	}
78
79	flash_get_offsets (0xffc00000, &flash_info[0]);
80	flash_info[0].size = size_b0;
81
82	/* monitor protection OFF by default */
83	flash_protect ( FLAG_PROTECT_CLEAR, 0xffc00000, 0x2000, flash_info );
84
85	return size_b0;
86	}
87
88	/*-----------------------------------------------------------------------
89	*/
90	static void flash_get_offsets (ulong base, flash_info_t *info)
91	{
92	int i;
93
94	/* set up sector start address table */
95	if (info->flash_id & FLASH_BTYPE)
96	{ /* bottom boot sector types - these are the useful ones! */
97	/* set sector offsets for bottom boot block type */
98	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B)
99	{ /* AMDLV320B has 8 x 8k bottom boot sectors */
100	for (i = 0; i < 8; i++) /* +8k */
101	info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
102	for (; i < info->sector_count; i++) /* +64k */
103	info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00070000 << FLASH_SHIFT);
104	}
105	else
106	{ /* other types have 4 bottom boot sectors (16,8,8,32) */
107	i = 0;
108	info->start[i++] = base + 0x00000000; /* - */
109	info->start[i++] = base + (0x00004000 << FLASH_SHIFT); /* +16k */
110	info->start[i++] = base + (0x00006000 << FLASH_SHIFT); /* +8k */
111	info->start[i++] = base + (0x00008000 << FLASH_SHIFT); /* +8k */
112	info->start[i++] = base + (0x00010000 << FLASH_SHIFT); /* +32k */
113	for (; i < info->sector_count; i++) /* +64k */
114	info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00030000 << FLASH_SHIFT);
115	}
116	}
117	else
118	{ /* top boot sector types - not so useful */
119	/* set sector offsets for top boot block type */
120	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T)
121	{ /* AMDLV320T has 8 x 8k top boot sectors */
122	for (i = 0; i < info->sector_count - 8; i++) /* +64k */
123	info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
124	for (; i < info->sector_count; i++) /* +8k */
125	info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
126	}
127	else
128	{ /* other types have 4 top boot sectors (32,8,8,16) */
129	for (i = 0; i < info->sector_count - 4; i++) /* +64k */
130	info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
131
132	info->start[i++] = base + info->size - (0x00010000 << FLASH_SHIFT); /* -32k */
133	info->start[i++] = base + info->size - (0x00008000 << FLASH_SHIFT); /* -8k */
134	info->start[i++] = base + info->size - (0x00006000 << FLASH_SHIFT); /* -8k */
135	info->start[i] = base + info->size - (0x00004000 << FLASH_SHIFT); /* -16k */
136	}
137	}
138	}
139
140	/*-----------------------------------------------------------------------
141	*/
142	void flash_print_info (flash_info_t *info)
143	{
144	int i;
145
146	if (info->flash_id == FLASH_UNKNOWN) {
147	printf ("missing or unknown FLASH type\n");
148	return;
149	}
150
151	switch (info->flash_id & FLASH_VENDMASK) {
152	case FLASH_MAN_AMD: printf ("AMD "); break;
153	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
154	case FLASH_MAN_STM: printf ("ST "); break;
155	default: printf ("Unknown Vendor "); break;
156	}
157
158	switch (info->flash_id & FLASH_TYPEMASK) {
159	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
160	break;
161	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
162	break;
163	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
164	break;
165	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
166	break;
167	case FLASH_STMW320DB: printf ("M29W320B (32 Mbit, bottom boot sect)\n");
168	break;
169	case FLASH_STMW320DT: printf ("M29W320T (32 Mbit, top boot sector)\n");
170	break;
171	default: printf ("Unknown Chip Type\n");
172	break;
173	}
174
175	printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
176
177	printf (" Sector Start Addresses:");
178	for (i=0; i<info->sector_count; ++i) {
179	if ((i % 5) == 0)
180	printf ("\n ");
181	printf (" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " ");
182	}
183	printf ("\n");
184	}
185
186	/*
187	* The following code cannot be run from FLASH!
188	*/
189
190	#define AMD_ID_LV160T_MVS (AMD_ID_LV160T & FLASH_DATA_MASK)
191	#define AMD_ID_LV160B_MVS (AMD_ID_LV160B & FLASH_DATA_MASK)
192	#define AMD_ID_LV320T_MVS (AMD_ID_LV320T & FLASH_DATA_MASK)
193	#define AMD_ID_LV320B_MVS (AMD_ID_LV320B & FLASH_DATA_MASK)
194	#define STM_ID_W320DT_MVS (STM_ID_29W320DT & FLASH_DATA_MASK)
195	#define STM_ID_W320DB_MVS (STM_ID_29W320DB & FLASH_DATA_MASK)
196	#define AMD_MANUFACT_MVS (AMD_MANUFACT & FLASH_DATA_MASK)
197	#define FUJ_MANUFACT_MVS (FUJ_MANUFACT & FLASH_DATA_MASK)
198	#define STM_MANUFACT_MVS (STM_MANUFACT & FLASH_DATA_MASK)
199
200	#if (FLASH_BUS_WIDTH >= 16)
201	#define AUTOSELECT_ADDR1 0x0555
202	#define AUTOSELECT_ADDR2 0x02AA
203	#define AUTOSELECT_ADDR3 AUTOSELECT_ADDR1
204	#else
205	#define AUTOSELECT_ADDR1 0x0AAA
206	#define AUTOSELECT_ADDR2 0x0555
207	#define AUTOSELECT_ADDR3 AUTOSELECT_ADDR1
208	#endif
209
210	#define AUTOSELECT_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
211	#define AUTOSELECT_DATA2 (0x00550055 & FLASH_DATA_MASK)
212	#define AUTOSELECT_DATA3 (0x00900090 & FLASH_DATA_MASK)
213
214	#define RESET_BANK_DATA (0x00F000F0 & FLASH_DATA_MASK)
215
216
217	static ulong flash_get_size (vu_long address, flash_info_t info)
218	{
219	short i;
220	FDT value;
221	FDT addr = (FDT )address;
222
223	ulong base = (ulong)address;
224	addr[AUTOSELECT_ADDR1] = AUTOSELECT_DATA1;
225	addr[AUTOSELECT_ADDR2] = AUTOSELECT_DATA2;
226	addr[AUTOSELECT_ADDR3] = AUTOSELECT_DATA3;
227	__asm__ __volatile__("sync");
228
229	udelay(180);
230
231	value = addr[0]; /* manufacturer ID */
232	switch (value) {
233	case AMD_MANUFACT_MVS:
234	info->flash_id = FLASH_MAN_AMD;
235	break;
236	case FUJ_MANUFACT_MVS:
237	info->flash_id = FLASH_MAN_FUJ;
238	break;
239	case STM_MANUFACT_MVS:
240	info->flash_id = FLASH_MAN_STM;
241	break;
242	default:
243	info->flash_id = FLASH_UNKNOWN;
244	info->sector_count = 0;
245	info->size = 0;
246	return (0); /* no or unknown flash */
247	}
248	#if (FLASH_BUS_WIDTH >= 16)
249	value = addr[1]; /* device ID */
250	#else
251	value = addr[2]; /* device ID */
252	#endif
253
254	switch (value) {
255	case AMD_ID_LV160T_MVS:
256	info->flash_id += FLASH_AM160T;
257	info->sector_count = 37;
258	info->size = (0x00200000 << FLASH_SHIFT);
259	break; /* => 2 or 4 MB */
260
261	case AMD_ID_LV160B_MVS:
262	info->flash_id += FLASH_AM160B;
263	info->sector_count = 37;
264	info->size = (0x00200000 << FLASH_SHIFT);
265	break; /* => 2 or 4 MB */
266
267	case AMD_ID_LV320T_MVS:
268	info->flash_id += FLASH_AM320T;
269	info->sector_count = 71;
270	info->size = (0x00400000 << FLASH_SHIFT);
271	break; /* => 4 or 8 MB */
272
273	case AMD_ID_LV320B_MVS:
274	info->flash_id += FLASH_AM320B;
275	info->sector_count = 71;
276	info->size = (0x00400000 << FLASH_SHIFT);
277	break; /* => 4 or 8MB */
278
279	case STM_ID_W320DT_MVS:
280	info->flash_id += FLASH_STMW320DT;
281	info->sector_count = 67;
282	info->size = (0x00400000 << FLASH_SHIFT);
283	break; /* => 4 or 8 MB */
284
285	case STM_ID_W320DB_MVS:
286	info->flash_id += FLASH_STMW320DB;
287	info->sector_count = 67;
288	info->size = (0x00400000 << FLASH_SHIFT);
289	break; /* => 4 or 8MB */
290
291	default:
292	info->flash_id = FLASH_UNKNOWN;
293	return (0); /* => no or unknown flash */
294
295	}
296
297	/* set up sector start address table */
298	flash_get_offsets (base, info);
299
300	/* check for protected sectors */
301	for (i = 0; i < info->sector_count; i++) {
302	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
303	/* D0 = 1 if protected */
304	addr = (FDT *)(info->start[i]);
305	info->protect[i] = addr[2] & 1;
306	}
307
308	/*
309	* Prevent writes to uninitialized FLASH.
310	*/
311	if (info->flash_id != FLASH_UNKNOWN) {
312	addr = (FDT *)info->start[0];
313	addr = RESET_BANK_DATA; / reset bank */
314	}
315	return (info->size);
316	}
317
318
319	/*-----------------------------------------------------------------------
320	*/
321
322	#if (FLASH_BUS_WIDTH >= 16)
323	#define ERASE_ADDR1 0x0555
324	#define ERASE_ADDR2 0x02AA
325	#else
326	#define ERASE_ADDR1 0x0AAA
327	#define ERASE_ADDR2 0x0555
328	#endif
329
330	#define ERASE_ADDR3 ERASE_ADDR1
331	#define ERASE_ADDR4 ERASE_ADDR1
332	#define ERASE_ADDR5 ERASE_ADDR2
333
334	#define ERASE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
335	#define ERASE_DATA2 (0x00550055 & FLASH_DATA_MASK)
336	#define ERASE_DATA3 (0x00800080 & FLASH_DATA_MASK)
337	#define ERASE_DATA4 ERASE_DATA1
338	#define ERASE_DATA5 ERASE_DATA2
339
53677ef1 WD	340	#define ERASE_SECTOR_DATA (0x00300030 & FLASH_DATA_MASK)
	341	#define ERASE_CHIP_DATA (0x00100010 & FLASH_DATA_MASK)
	342	#define ERASE_CONFIRM_DATA (0x00800080 & FLASH_DATA_MASK)
b4676a25 WD	343
	344	int flash_erase (flash_info_t *info, int s_first, int s_last)
	345	{
	346	FDT addr = (FDT )(info->start[0]);
	347
	348	int prot, sect, l_sect, flag;
	349	ulong start, now, last;
	350
	351	__asm__ __volatile__ ("sync");
	352	addr[0] = 0xf0;
	353	udelay(1000);
	354
	355	printf("\nflash_erase: first = %d @ 0x%08lx\n", s_first, info->start[s_first] );
	356	printf(" last = %d @ 0x%08lx\n", s_last , info->start[s_last ] );
	357
	358	if ((s_first < 0) \|\| (s_first > s_last)) {
	359	if (info->flash_id == FLASH_UNKNOWN) {
	360	printf ("- missing\n");
	361	} else {
	362	printf ("- no sectors to erase\n");
	363	}
	364	return 1;
	365	}
	366
	367	if ((info->flash_id == FLASH_UNKNOWN) \|\| (info->flash_id > FLASH_AMD_COMP)) {
	368	printf ("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
	369	return 1;
	370	}
	371
	372	prot = 0;
	373	for (sect=s_first; sect<=s_last; ++sect) {
	374	if (info->protect[sect]) {
	375	prot++;
	376	}
	377	}
	378
	379	if (prot) {
	380	printf ("- Warning: %d protected sectors will not be erased!\n",
	381	prot);
	382	} else {
	383	printf ("\n");
	384	}
	385
	386	l_sect = -1;
	387
	388	/* Disable interrupts which might cause a timeout here */
	389	flag = disable_interrupts();
	390
	391	addr[ERASE_ADDR1] = ERASE_DATA1;
	392	addr[ERASE_ADDR2] = ERASE_DATA2;
	393	addr[ERASE_ADDR3] = ERASE_DATA3;
	394	addr[ERASE_ADDR4] = ERASE_DATA4;
	395	addr[ERASE_ADDR5] = ERASE_DATA5;
	396
	397	for (sect = s_first; sect <= s_last; sect++) {
	398	if (info->protect[sect] == 0) {
	399	addr = (FDT *)(info->start[sect]);
	400	addr[0] = ERASE_SECTOR_DATA;
	401	l_sect = sect;
	402	}
	403	}
	404
	405	if (flag)
	406	enable_interrupts();
407
408	/*
409	* We wait for the last triggered sector
410	*/
411	if (l_sect < 0)
412	goto DONE;
413
414	start = get_timer (0);
415	last = start;
416	addr = (FDT *)(info->start[l_sect]);
417
418	while ((addr[0] & ERASE_CONFIRM_DATA) != ERASE_CONFIRM_DATA) {
419	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
420	printf ("Timeout\n");
421	return 1;
422	}
423	/* show that we're waiting */
424	if ((now - last) > 1000) { /* every second */
425	putc ('.');
426	last = now;
427	}
428	}
429
430	DONE:
431	printf (" done\n");
432	return 0;
433	}
434
435	/*-----------------------------------------------------------------------
436	* Copy memory to flash, returns:
437	* 0 - OK
438	* 1 - write timeout
439	* 2 - Flash not erased
440	*/
441
442	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
443	{
444	#define BUFF_INC 4
445	ulong cp, wp, data;
446	int i, l, rc;
447
448	mvdebug (("+write_buff %p ==> 0x%08lx, count = 0x%08lx\n", src, addr, cnt));
449
450	wp = (addr & ~3); /* get lower word aligned address */
451	/*
452	* handle unaligned start bytes
453	*/
454	if ((l = addr - wp) != 0) {
455	mvdebug ((" handle unaligned start bytes (cnt = 0x%08lx)\n", cnt));
456	data = 0;
457	for (i=0, cp=wp; i<l; ++i, ++cp) {
458	data = (data << 8) \| ((uchar )cp);
459	}
460	for (; i<BUFF_INC && cnt>0; ++i) {
461	data = (data << 8) \| *src++;
462	--cnt;
463	++cp;
464	}
465	for (; cnt==0 && i<BUFF_INC; ++i, ++cp) {
466	data = (data << 8) \| ((uchar )cp);
467	}
468
469	if ((rc = write_word(info, wp, data)) != 0) {
470	return (rc);
471	}
472	wp += BUFF_INC;
473	}
474
475	/*
476	* handle (half)word aligned part
477	*/
478	mvdebug ((" handle word aligned part (cnt = 0x%08lx)\n", cnt));
479	while (cnt >= BUFF_INC) {
480	data = 0;
481	for (i=0; i<BUFF_INC; ++i) {
482	data = (data << 8) \| *src++;
483	}
484	if ((rc = write_word(info, wp, data)) != 0) {
485	return (rc);
486	}
487	wp += BUFF_INC;
488	cnt -= BUFF_INC;
489	}
490
491	if (cnt == 0) {
492	return (0);
493	}
494
495	/*
496	* handle unaligned tail bytes
497	*/
498	mvdebug ((" handle unaligned tail bytes (cnt = 0x%08lx)\n", cnt));
499	data = 0;
500	for (i=0, cp=wp; i<BUFF_INC && cnt>0; ++i, ++cp) {
501	data = (data << 8) \| *src++;
502	--cnt;
503	}
504	for (; i<BUFF_INC; ++i, ++cp) {
505	data = (data << 8) \| ((uchar )cp);
506	}
507
508	return (write_word(info, wp, data));
509	}
510
511	#if (FLASH_BUS_WIDTH >= 16)
512	#define WRITE_ADDR1 0x0555
513	#define WRITE_ADDR2 0x02AA
514	#else
515	#define WRITE_ADDR1 0x0AAA
516	#define WRITE_ADDR2 0x0555
517	#define WRITE_ADDR3 WRITE_ADDR1
518	#endif
519
520	#define WRITE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
521	#define WRITE_DATA2 (0x00550055 & FLASH_DATA_MASK)
522	#define WRITE_DATA3 (0x00A000A0 & FLASH_DATA_MASK)
523
524	#define WRITE_CONFIRM_DATA ERASE_CONFIRM_DATA
525
526	/*-----------------------------------------------------------------------
527	* Write a byte to Flash, returns:
528	* 0 - OK
529	* 1 - write timeout
530	* 2 - Flash not erased
531	*/
532	static int write_char (flash_info_t *info, ulong dest, uchar data)
533	{
534	vu_char addr = (vu_char )(info->start[0]);
535	ulong start;
536	int flag;
537
538	/* Check if Flash is (sufficiently) erased */
539	if ((((vu_char )dest) & data) != data) {
540	printf(" *** ERROR: Flash not erased !\n");
541	return (2);
542	}
543	flag = disable_interrupts();
544
545	addr[WRITE_ADDR1] = WRITE_DATA1;
546	addr[WRITE_ADDR2] = WRITE_DATA2;
547	addr[WRITE_ADDR3] = WRITE_DATA3;
548	((vu_char )dest) = data;
549
550	if (flag)
551	enable_interrupts();
552
553	/* data polling for D7 */
554	start = get_timer (0);
555	addr = (vu_char *)dest;
556	while (( (*addr) & WRITE_CONFIRM_DATA) != (data & WRITE_CONFIRM_DATA)) {
557	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
558	printf(" *** ERROR: Flash write timeout !");
559	return (1);
560	}
561	}
53677ef1	562	mvdebug (("-write_byte\n"));
b4676a25 WD	563	return (0);
	564	}
	565
	566	/*-----------------------------------------------------------------------
	567	* Write a word to Flash, returns:
	568	* 0 - OK
	569	* 1 - write timeout
	570	* 2 - Flash not erased
	571	*/
	572	static int write_word (flash_info_t *info, ulong dest, ulong data)
	573	{
	574	int i,
	575	result = 0;
	576
	577	mvdebug (("+write_word : 0x%08lx @ 0x%08lx\n", data, dest));
	578	for ( i=0; (i < 4) && (result == 0); i++, dest+=1 )
	579	result = write_char (info, dest, (data >> (8*(3-i))) & 0xff );
53677ef1	580	mvdebug (("-write_word\n"));
b4676a25 WD	581	return result;
	582	}
	583	/---------------------------------------------------------------- /