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

/*
 * (C) Copyright 2000
 * 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[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips        */

#if defined(CFG_ENV_IS_IN_FLASH)
# ifndef  CFG_ENV_ADDR
#  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef  CFG_ENV_SIZE
#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
# endif
# ifndef  CFG_ENV_SECT_SIZE
#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
# endif
#endif

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

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

unsigned long flash_init (void)
{
	volatile immap_t *immap = (immap_t *) CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long total_size;
	unsigned long size_b0, size_b1;
	int i;

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

	total_size = 0;
	size_b0 = 0xffffffff;

	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
		size_b1 =
			flash_get_size ((vu_long *) (CFG_FLASH_BASE +
						     total_size),
					&flash_info[i]);

		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
			printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, size_b1, size_b1 >> 20);
		}

		/* Is this really needed ? - LP */
		if (size_b1 > size_b0) {
			printf ("## ERROR: Bank %d (0x%08lx = %ld MB) > Bank %d (0x%08lx = %ld MB)\n", i, size_b1, size_b1 >> 20, i - 1, size_b0, size_b0 >> 20);
			goto out_error;
		}
		size_b0 = size_b1;
		total_size += size_b1;
	}

	/* Compute the Address Mask */
	for (i = 0; (total_size >> i) != 0; ++i) {
	}
	i--;

	if (total_size != (1 << i)) {
		printf ("## WARNING: Total FLASH size (0x%08lx = %ld MB) is not a power of 2\n", total_size, total_size >> 20);
	}

	/* Remap FLASH according to real size */
	memctl->memc_or0 =
		((((unsigned long) ~0) << i) & OR_AM_MSK) |
		CFG_OR_TIMING_FLASH;
	memctl->memc_br0 = CFG_BR0_PRELIM;

	total_size = 0;

	for (i = 0; i < CFG_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) {
		/* Re-do sizing to get full correct info */
		/* Why ? - LP */
		size_b1 =
			flash_get_size ((vu_long *) (CFG_FLASH_BASE +
						     total_size),
					&flash_info[i]);

		/* This is done by flash_get_size - LP */
		/* flash_get_offsets (CFG_FLASH_BASE + total_size, &flash_info[i]); */

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

#ifdef	CFG_ENV_IS_IN_FLASH
		/* ENV protection ON by default */
		flash_protect (FLAG_PROTECT_SET,
			       CFG_ENV_ADDR,
			       CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
			       &flash_info[i]);
#endif

		total_size += size_b1;
	}

	return (total_size);

      out_error:
	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
		flash_info[i].sector_count = -1;
		flash_info[i].size = 0;
	}

	return (0);
}

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

	/* set up sector start address table */
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040
	    || (info->flash_id & FLASH_TYPEMASK) == FLASH_AM080) {
		/* set sector offsets for uniform sector type   */
		for (i = 0; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00040000);
		}
	}
}

/*-----------------------------------------------------------------------
 */
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_BM:
		printf ("BRIGHT MICRO ");
		break;
	default:
		printf ("Unknown Vendor ");
		break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:
		printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
		break;
	case FLASH_AM080:
		printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n");
		break;
	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;

#if 0
	ulong base = (ulong) addr;
#endif
	uchar value;

	/* Write auto select command: read Manufacturer ID */
#if 0
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00900090;
#else
	addr[0x0555] = 0xAAAAAAAA;
	addr[0x02AA] = 0x55555555;
	addr[0x0555] = 0x90909090;
#endif

	value = addr[0];

	switch (value + (value << 16)) {
	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;
		break;
	}

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

	switch (value) {
	case AMD_ID_F040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x00200000;
		break;		/* => 2 MB              */

	case AMD_ID_F080B:
		info->flash_id += FLASH_AM080;
		info->sector_count = 16;
		info->size = 0x00400000;
		break;		/* => 4 MB              */

	case AMD_ID_LV400T:
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;		/* => 1 MB              */

	case AMD_ID_LV400B:
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;		/* => 1 MB              */

	case AMD_ID_LV800T:
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;		/* => 2 MB              */

	case AMD_ID_LV800B:
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;		/* => 2 MB              */

	case AMD_ID_LV160T:
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;		/* => 4 MB              */

	case AMD_ID_LV160B:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;		/* => 4 MB              */
#if 0				/* enable when device IDs are available */
	case AMD_ID_LV320T:
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;		/* => 8 MB              */

	case AMD_ID_LV320B:
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;		/* => 8 MB              */
#endif
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);	/* => no or unknown flash */

	}

#if 0
	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE) {
		/* set sector offsets for bottom boot block type        */
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	} else {
		/* set sector offsets for top boot block type           */
		i = info->sector_count - 1;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	}
#else
	flash_get_offsets ((ulong) addr, info);
#endif

	/* 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 = (volatile unsigned long *) (info->start[i]);
		info->protect[i] = addr[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr = (volatile unsigned long *) info->start[0];
#if 0
		*addr = 0x00F000F0;	/* reset bank */
#else
		*addr = 0xF0F0F0F0;	/* reset bank */
#endif
	}

	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, 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;
	}

	if ((info->flash_id == FLASH_UNKNOWN) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type - aborted\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 ();

#if 0
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00800080;
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
#else
	addr[0x0555] = 0xAAAAAAAA;
	addr[0x02AA] = 0x55555555;
	addr[0x0555] = 0x80808080;
	addr[0x0555] = 0xAAAAAAAA;
	addr[0x02AA] = 0x55555555;
#endif

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long *) (info->start[sect]);
#if 0
			addr[0] = 0x00300030;
#else
			addr[0] = 0x30303030;
#endif
			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;
	addr = (vu_long *) (info->start[l_sect]);
#if 0
	while ((addr[0] & 0x00800080) != 0x00800080)
#else
	while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
#endif
	{
		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:
	/* reset to read mode */
	addr = (volatile unsigned long *) info->start[0];
#if 0
	addr[0] = 0x00F000F0;	/* reset bank */
#else
	addr[0] = 0xF0F0F0F0;	/* 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]);
	ulong start;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_long *) dest) & data) != data) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

#if 0
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;
#else
	addr[0x0555] = 0xAAAAAAAA;
	addr[0x02AA] = 0x55555555;
	addr[0x0555] = 0xA0A0A0A0;
#endif

	*((vu_long *) dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);
#if 0
	while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080))
#else
	while ((*((vu_long *) dest) & 0x80808080) != (data & 0x80808080))
#endif
	{
		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2000
	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
bf9e3b38	27	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
affae2bf WD	28
	29	#if defined(CFG_ENV_IS_IN_FLASH)
	30	# ifndef CFG_ENV_ADDR
	31	# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	32	# endif
	33	# ifndef CFG_ENV_SIZE
	34	# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
	35	# endif
	36	# ifndef CFG_ENV_SECT_SIZE
	37	# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
	38	# endif
	39	#endif
	40
	41	/*-----------------------------------------------------------------------
	42	* Functions
	43	*/
bf9e3b38 WD	44	static ulong flash_get_size (vu_long * addr, flash_info_t * info);
	45	static int write_word (flash_info_t * info, ulong dest, ulong data);
	46	static void flash_get_offsets (ulong base, flash_info_t * info);
affae2bf WD	47
	48	/*-----------------------------------------------------------------------
	49	*/
	50
	51	unsigned long flash_init (void)
	52	{
bf9e3b38	53	volatile immap_t immap = (immap_t ) CFG_IMMR;
affae2bf WD	54	volatile memctl8xx_t *memctl = &immap->im_memctl;
	55	unsigned long total_size;
	56	unsigned long size_b0, size_b1;
	57	int i;
	58
	59	/* Init: no FLASHes known */
bf9e3b38	60	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
affae2bf WD	61	flash_info[i].flash_id = FLASH_UNKNOWN;
	62	}
	63
	64	total_size = 0;
	65	size_b0 = 0xffffffff;
	66
bf9e3b38 WD	67	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
	68	size_b1 =
	69	flash_get_size ((vu_long *) (CFG_FLASH_BASE +
	70	total_size),
	71	&flash_info[i]);
affae2bf	72
bf9e3b38 WD	73	if (flash_info[i].flash_id == FLASH_UNKNOWN) {
bf9e3b38 WD	74	printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, size_b1, size_b1 >> 20);
affae2bf WD	75	}
	76
	77	/* Is this really needed ? - LP */
	78	if (size_b1 > size_b0) {
bf9e3b38	79	printf ("## ERROR: Bank %d (0x%08lx = %ld MB) > Bank %d (0x%08lx = %ld MB)\n", i, size_b1, size_b1 >> 20, i - 1, size_b0, size_b0 >> 20);
affae2bf WD	80	goto out_error;
	81	}
	82	size_b0 = size_b1;
	83	total_size += size_b1;
	84	}
	85
	86	/* Compute the Address Mask */
bf9e3b38 WD	87	for (i = 0; (total_size >> i) != 0; ++i) {
bf9e3b38 WD	88	}
affae2bf WD	89	i--;
	90
	91	if (total_size != (1 << i)) {
bf9e3b38	92	printf ("## WARNING: Total FLASH size (0x%08lx = %ld MB) is not a power of 2\n", total_size, total_size >> 20);
affae2bf WD	93	}
	94
	95	/* Remap FLASH according to real size */
bf9e3b38	96	memctl->memc_or0 =
a56bd922	97	((((unsigned long) ~0) << i) & OR_AM_MSK) \|
bf9e3b38	98	CFG_OR_TIMING_FLASH;
affae2bf WD	99	memctl->memc_br0 = CFG_BR0_PRELIM;
	100
	101	total_size = 0;
	102
bf9e3b38	103	for (i = 0; i < CFG_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) {
affae2bf WD	104	/* Re-do sizing to get full correct info */
affae2bf WD	105	/* Why ? - LP */
bf9e3b38 WD	106	size_b1 =
	107	flash_get_size ((vu_long *) (CFG_FLASH_BASE +
	108	total_size),
	109	&flash_info[i]);
affae2bf WD	110
	111	/* This is done by flash_get_size - LP */
	112	/* flash_get_offsets (CFG_FLASH_BASE + total_size, &flash_info[i]); */
	113
	114	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	115	/* monitor protection ON by default */
bf9e3b38 WD	116	flash_protect (FLAG_PROTECT_SET,
	117	CFG_MONITOR_BASE,
	118	CFG_MONITOR_BASE + monitor_flash_len - 1,
	119	&flash_info[i]);
affae2bf WD	120	#endif
	121
	122	#ifdef CFG_ENV_IS_IN_FLASH
	123	/* ENV protection ON by default */
bf9e3b38 WD	124	flash_protect (FLAG_PROTECT_SET,
	125	CFG_ENV_ADDR,
	126	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
	127	&flash_info[i]);
affae2bf WD	128	#endif
	129
	130	total_size += size_b1;
	131	}
	132
	133	return (total_size);
	134
bf9e3b38 WD	135	out_error:
	136	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
	137	flash_info[i].flash_id = FLASH_UNKNOWN;
	138	flash_info[i].sector_count = -1;
	139	flash_info[i].size = 0;
affae2bf WD	140	}
	141
	142	return (0);
	143	}
	144
	145	/*-----------------------------------------------------------------------
	146	*/
bf9e3b38	147	static void flash_get_offsets (ulong base, flash_info_t * info)
affae2bf WD	148	{
	149	int i;
	150
	151	/* set up sector start address table */
bf9e3b38 WD	152	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040
	153	\|\| (info->flash_id & FLASH_TYPEMASK) == FLASH_AM080) {
	154	/* set sector offsets for uniform sector type */
affae2bf WD	155	for (i = 0; i < info->sector_count; i++) {
	156	info->start[i] = base + (i * 0x00040000);
	157	}
	158	}
	159	}
	160
	161	/*-----------------------------------------------------------------------
	162	*/
bf9e3b38	163	void flash_print_info (flash_info_t * info)
affae2bf WD	164	{
	165	int i;
	166
bf9e3b38	167	if (info->flash_id == FLASH_UNKNOWN) {
affae2bf WD	168	printf ("missing or unknown FLASH type\n");
	169	return;
	170	}
	171
bf9e3b38 WD	172	switch (info->flash_id & FLASH_VENDMASK) {
	173	case FLASH_MAN_AMD:
	174	printf ("AMD ");
	175	break;
	176	case FLASH_MAN_FUJ:
	177	printf ("FUJITSU ");
	178	break;
	179	case FLASH_MAN_BM:
	180	printf ("BRIGHT MICRO ");
	181	break;
	182	default:
	183	printf ("Unknown Vendor ");
	184	break;
affae2bf WD	185	}
affae2bf WD	186
bf9e3b38 WD	187	switch (info->flash_id & FLASH_TYPEMASK) {
	188	case FLASH_AM040:
	189	printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
	190	break;
	191	case FLASH_AM080:
	192	printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n");
	193	break;
	194	case FLASH_AM400B:
	195	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	196	break;
	197	case FLASH_AM400T:
	198	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	199	break;
	200	case FLASH_AM800B:
	201	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	202	break;
	203	case FLASH_AM800T:
	204	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	205	break;
	206	case FLASH_AM160B:
	207	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	208	break;
	209	case FLASH_AM160T:
	210	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	211	break;
	212	case FLASH_AM320B:
	213	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	214	break;
	215	case FLASH_AM320T:
	216	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	217	break;
	218	default:
	219	printf ("Unknown Chip Type\n");
	220	break;
affae2bf WD	221	}
affae2bf WD	222
bf9e3b38 WD	223	printf (" Size: %ld MB in %d Sectors\n", info->size >> 20,
bf9e3b38 WD	224	info->sector_count);
affae2bf WD	225
	226	printf (" Sector Start Addresses:");
	227
bf9e3b38 WD	228	for (i = 0; i < info->sector_count; ++i) {
bf9e3b38 WD	229	if ((i % 5) == 0) {
affae2bf WD	230	printf ("\n ");
	231	}
	232
	233	printf (" %08lX%s",
bf9e3b38	234	info->start[i], info->protect[i] ? " (RO)" : " ");
affae2bf WD	235	}
	236
	237	printf ("\n");
	238	return;
	239	}
	240
	241	/*-----------------------------------------------------------------------
	242	*/
	243
	244
	245	/*-----------------------------------------------------------------------
	246	*/
	247
	248	/*
	249	* The following code cannot be run from FLASH!
	250	*/
	251
bf9e3b38	252	static ulong flash_get_size (vu_long * addr, flash_info_t * info)
affae2bf WD	253	{
affae2bf WD	254	short i;
bf9e3b38	255
affae2bf	256	#if 0
bf9e3b38	257	ulong base = (ulong) addr;
affae2bf WD	258	#endif
	259	uchar value;
	260
	261	/* Write auto select command: read Manufacturer ID */
	262	#if 0
	263	addr[0x0555] = 0x00AA00AA;
	264	addr[0x02AA] = 0x00550055;
	265	addr[0x0555] = 0x00900090;
	266	#else
	267	addr[0x0555] = 0xAAAAAAAA;
	268	addr[0x02AA] = 0x55555555;
	269	addr[0x0555] = 0x90909090;
	270	#endif
	271
	272	value = addr[0];
	273
bf9e3b38 WD	274	switch (value + (value << 16)) {
	275	case AMD_MANUFACT:
	276	info->flash_id = FLASH_MAN_AMD;
	277	break;
affae2bf	278
bf9e3b38 WD	279	case FUJ_MANUFACT:
	280	info->flash_id = FLASH_MAN_FUJ;
	281	break;
affae2bf	282
bf9e3b38 WD	283	default:
	284	info->flash_id = FLASH_UNKNOWN;
	285	info->sector_count = 0;
	286	info->size = 0;
	287	break;
	288	}
	289
	290	value = addr[1]; /* device ID */
	291
	292	switch (value) {
	293	case AMD_ID_F040B:
	294	info->flash_id += FLASH_AM040;
	295	info->sector_count = 8;
	296	info->size = 0x00200000;
	297	break; /* => 2 MB */
	298
	299	case AMD_ID_F080B:
	300	info->flash_id += FLASH_AM080;
	301	info->sector_count = 16;
	302	info->size = 0x00400000;
	303	break; /* => 4 MB */
	304
	305	case AMD_ID_LV400T:
	306	info->flash_id += FLASH_AM400T;
	307	info->sector_count = 11;
	308	info->size = 0x00100000;
	309	break; /* => 1 MB */
	310
	311	case AMD_ID_LV400B:
	312	info->flash_id += FLASH_AM400B;
	313	info->sector_count = 11;
	314	info->size = 0x00100000;
	315	break; /* => 1 MB */
	316
	317	case AMD_ID_LV800T:
	318	info->flash_id += FLASH_AM800T;
	319	info->sector_count = 19;
	320	info->size = 0x00200000;
	321	break; /* => 2 MB */
	322
	323	case AMD_ID_LV800B:
	324	info->flash_id += FLASH_AM800B;
	325	info->sector_count = 19;
	326	info->size = 0x00200000;
	327	break; /* => 2 MB */
	328
	329	case AMD_ID_LV160T:
	330	info->flash_id += FLASH_AM160T;
	331	info->sector_count = 35;
	332	info->size = 0x00400000;
	333	break; /* => 4 MB */
	334
	335	case AMD_ID_LV160B:
	336	info->flash_id += FLASH_AM160B;
	337	info->sector_count = 35;
	338	info->size = 0x00400000;
	339	break; /* => 4 MB */
	340	#if 0 /* enable when device IDs are available */
	341	case AMD_ID_LV320T:
	342	info->flash_id += FLASH_AM320T;
	343	info->sector_count = 67;
	344	info->size = 0x00800000;
	345	break; /* => 8 MB */
	346
347	case AMD_ID_LV320B:
348	info->flash_id += FLASH_AM320B;
349	info->sector_count = 67;
350	info->size = 0x00800000;
351	break; /* => 8 MB */
affae2bf	352	#endif
bf9e3b38 WD	353	default:
	354	info->flash_id = FLASH_UNKNOWN;
	355	return (0); /* => no or unknown flash */
affae2bf WD	356
	357	}
	358
	359	#if 0
	360	/* set up sector start address table */
	361	if (info->flash_id & FLASH_BTYPE) {
bf9e3b38	362	/* set sector offsets for bottom boot block type */
affae2bf WD	363	info->start[0] = base + 0x00000000;
	364	info->start[1] = base + 0x00008000;
	365	info->start[2] = base + 0x0000C000;
	366	info->start[3] = base + 0x00010000;
	367	for (i = 4; i < info->sector_count; i++) {
	368	info->start[i] = base + (i * 0x00020000) - 0x00060000;
	369	}
	370	} else {
bf9e3b38	371	/* set sector offsets for top boot block type */
affae2bf WD	372	i = info->sector_count - 1;
	373	info->start[i--] = base + info->size - 0x00008000;
	374	info->start[i--] = base + info->size - 0x0000C000;
	375	info->start[i--] = base + info->size - 0x00010000;
	376	for (; i >= 0; i--) {
	377	info->start[i] = base + i * 0x00020000;
	378	}
	379	}
	380	#else
bf9e3b38	381	flash_get_offsets ((ulong) addr, info);
affae2bf WD	382	#endif
	383
	384	/* check for protected sectors */
bf9e3b38	385	for (i = 0; i < info->sector_count; i++) {
affae2bf WD	386	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
affae2bf WD	387	/* D0 = 1 if protected */
bf9e3b38	388	addr = (volatile unsigned long *) (info->start[i]);
affae2bf WD	389	info->protect[i] = addr[2] & 1;
	390	}
	391
	392	/*
	393	* Prevent writes to uninitialized FLASH.
	394	*/
bf9e3b38 WD	395	if (info->flash_id != FLASH_UNKNOWN) {
bf9e3b38 WD	396	addr = (volatile unsigned long *) info->start[0];
affae2bf WD	397	#if 0
	398	addr = 0x00F000F0; / reset bank */
	399	#else
	400	addr = 0xF0F0F0F0; / reset bank */
	401	#endif
	402	}
	403
	404	return (info->size);
	405	}
	406
	407
	408	/*-----------------------------------------------------------------------
	409	*/
	410
bf9e3b38	411	int flash_erase (flash_info_t * info, int s_first, int s_last)
affae2bf	412	{
bf9e3b38	413	vu_long addr = (vu_long ) (info->start[0]);
affae2bf WD	414	int flag, prot, sect, l_sect;
	415	ulong start, now, last;
	416
	417	if ((s_first < 0) \|\| (s_first > s_last)) {
	418	if (info->flash_id == FLASH_UNKNOWN) {
	419	printf ("- missing\n");
	420	} else {
	421	printf ("- no sectors to erase\n");
	422	}
	423	return 1;
	424	}
	425
	426	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	427	(info->flash_id > FLASH_AMD_COMP)) {
	428	printf ("Can't erase unknown flash type - aborted\n");
	429	return 1;
	430	}
	431
	432	prot = 0;
bf9e3b38	433	for (sect = s_first; sect <= s_last; ++sect) {
affae2bf WD	434	if (info->protect[sect]) {
	435	prot++;
	436	}
	437	}
	438
	439	if (prot) {
bf9e3b38	440	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
affae2bf WD	441	} else {
	442	printf ("\n");
	443	}
	444
	445	l_sect = -1;
	446
	447	/* Disable interrupts which might cause a timeout here */
bf9e3b38	448	flag = disable_interrupts ();
affae2bf WD	449
	450	#if 0
	451	addr[0x0555] = 0x00AA00AA;
	452	addr[0x02AA] = 0x00550055;
	453	addr[0x0555] = 0x00800080;
	454	addr[0x0555] = 0x00AA00AA;
	455	addr[0x02AA] = 0x00550055;
	456	#else
	457	addr[0x0555] = 0xAAAAAAAA;
	458	addr[0x02AA] = 0x55555555;
	459	addr[0x0555] = 0x80808080;
	460	addr[0x0555] = 0xAAAAAAAA;
	461	addr[0x02AA] = 0x55555555;
	462	#endif
	463
	464	/* Start erase on unprotected sectors */
bf9e3b38	465	for (sect = s_first; sect <= s_last; sect++) {
affae2bf	466	if (info->protect[sect] == 0) { /* not protected */
bf9e3b38	467	addr = (vu_long *) (info->start[sect]);
affae2bf WD	468	#if 0
	469	addr[0] = 0x00300030;
	470	#else
	471	addr[0] = 0x30303030;
	472	#endif
	473	l_sect = sect;
	474	}
	475	}
	476
	477	/* re-enable interrupts if necessary */
	478	if (flag)
bf9e3b38	479	enable_interrupts ();
affae2bf WD	480
	481	/* wait at least 80us - let's wait 1 ms */
	482	udelay (1000);
	483
	484	/*
	485	* We wait for the last triggered sector
	486	*/
	487	if (l_sect < 0)
	488	goto DONE;
	489
	490	start = get_timer (0);
bf9e3b38 WD	491	last = start;
bf9e3b38 WD	492	addr = (vu_long *) (info->start[l_sect]);
affae2bf WD	493	#if 0
	494	while ((addr[0] & 0x00800080) != 0x00800080)
	495	#else
	496	while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
	497	#endif
	498	{
bf9e3b38	499	if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
affae2bf WD	500	printf ("Timeout\n");
	501	return 1;
	502	}
	503	/* show that we're waiting */
	504	if ((now - last) > 1000) { /* every second */
	505	putc ('.');
	506	last = now;
	507	}
	508	}
	509
bf9e3b38	510	DONE:
affae2bf	511	/* reset to read mode */
bf9e3b38	512	addr = (volatile unsigned long *) info->start[0];
affae2bf WD	513	#if 0
	514	addr[0] = 0x00F000F0; /* reset bank */
	515	#else
	516	addr[0] = 0xF0F0F0F0; /* reset bank */
	517	#endif
	518
	519	printf (" done\n");
	520	return 0;
	521	}
	522
	523	/*-----------------------------------------------------------------------
	524	* Copy memory to flash, returns:
	525	* 0 - OK
	526	* 1 - write timeout
	527	* 2 - Flash not erased
	528	*/
	529
bf9e3b38	530	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
affae2bf WD	531	{
	532	ulong cp, wp, data;
	533	int i, l, rc;
	534
	535	wp = (addr & ~3); /* get lower word aligned address */
	536
	537	/*
	538	* handle unaligned start bytes
	539	*/
	540	if ((l = addr - wp) != 0) {
	541	data = 0;
bf9e3b38 WD	542	for (i = 0, cp = wp; i < l; ++i, ++cp) {
bf9e3b38 WD	543	data = (data << 8) \| ((uchar ) cp);
affae2bf	544	}
bf9e3b38	545	for (; i < 4 && cnt > 0; ++i) {
affae2bf WD	546	data = (data << 8) \| *src++;
	547	--cnt;
	548	++cp;
	549	}
bf9e3b38 WD	550	for (; cnt == 0 && i < 4; ++i, ++cp) {
bf9e3b38 WD	551	data = (data << 8) \| ((uchar ) cp);
affae2bf WD	552	}
affae2bf WD	553
bf9e3b38	554	if ((rc = write_word (info, wp, data)) != 0) {
affae2bf WD	555	return (rc);
	556	}
	557	wp += 4;
	558	}
	559
	560	/*
	561	* handle word aligned part
	562	*/
	563	while (cnt >= 4) {
	564	data = 0;
bf9e3b38	565	for (i = 0; i < 4; ++i) {
affae2bf WD	566	data = (data << 8) \| *src++;
affae2bf WD	567	}
bf9e3b38	568	if ((rc = write_word (info, wp, data)) != 0) {
affae2bf WD	569	return (rc);
affae2bf WD	570	}
bf9e3b38	571	wp += 4;
affae2bf WD	572	cnt -= 4;
	573	}
	574
	575	if (cnt == 0) {
	576	return (0);
	577	}
	578
	579	/*
	580	* handle unaligned tail bytes
	581	*/
	582	data = 0;
bf9e3b38	583	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
affae2bf WD	584	data = (data << 8) \| *src++;
	585	--cnt;
	586	}
bf9e3b38 WD	587	for (; i < 4; ++i, ++cp) {
bf9e3b38 WD	588	data = (data << 8) \| ((uchar ) cp);
affae2bf WD	589	}
affae2bf WD	590
bf9e3b38	591	return (write_word (info, wp, data));
affae2bf WD	592	}
	593
	594	/*-----------------------------------------------------------------------
	595	* Write a word to Flash, returns:
	596	* 0 - OK
	597	* 1 - write timeout
	598	* 2 - Flash not erased
	599	*/
bf9e3b38	600	static int write_word (flash_info_t * info, ulong dest, ulong data)
affae2bf	601	{
bf9e3b38	602	vu_long addr = (vu_long ) (info->start[0]);
affae2bf WD	603	ulong start;
	604	int flag;
	605
	606	/* Check if Flash is (sufficiently) erased */
bf9e3b38	607	if ((((vu_long ) dest) & data) != data) {
affae2bf WD	608	return (2);
	609	}
	610	/* Disable interrupts which might cause a timeout here */
bf9e3b38	611	flag = disable_interrupts ();
affae2bf WD	612
	613	#if 0
	614	addr[0x0555] = 0x00AA00AA;
	615	addr[0x02AA] = 0x00550055;
	616	addr[0x0555] = 0x00A000A0;
	617	#else
	618	addr[0x0555] = 0xAAAAAAAA;
	619	addr[0x02AA] = 0x55555555;
	620	addr[0x0555] = 0xA0A0A0A0;
	621	#endif
	622
bf9e3b38	623	((vu_long ) dest) = data;
affae2bf WD	624
	625	/* re-enable interrupts if necessary */
	626	if (flag)
bf9e3b38	627	enable_interrupts ();
affae2bf WD	628
	629	/* data polling for D7 */
	630	start = get_timer (0);
	631	#if 0
bf9e3b38	632	while ((((vu_long ) dest) & 0x00800080) != (data & 0x00800080))
affae2bf	633	#else
bf9e3b38	634	while ((((vu_long ) dest) & 0x80808080) != (data & 0x80808080))
affae2bf WD	635	#endif
affae2bf WD	636	{
bf9e3b38	637	if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
affae2bf WD	638	return (1);
	639	}
	640	}
	641	return (0);
	642	}
	643
	644	/*-----------------------------------------------------------------------
	645	*/