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

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/* #define DEBUG */

#include <common.h>
#include <mpc8xx.h>

#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef  CONFIG_ENV_ADDR
#  define CONFIG_ENV_ADDR	(CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
# ifndef  CONFIG_ENV_SIZE
#  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
# endif
# ifndef  CONFIG_ENV_SECT_SIZE
#  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
# endif
#endif

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

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

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_data (flash_info_t *info, ulong dest, ulong data);
#ifdef CFG_FLASH_USE_BUFFER_WRITE
static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
#endif
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 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;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */

	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);

	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: "
			"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
			flash_info[0].flash_id,
			size_b0, size_b0<<20);
	}

	debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);

	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);

	debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	if (size_b1 > size_b0) {
		printf ("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1<<20,
			size_b0, size_b0<<20
		);
		flash_info[0].flash_id	= FLASH_UNKNOWN;
		flash_info[1].flash_id	= FLASH_UNKNOWN;
		flash_info[0].sector_count	= -1;
		flash_info[1].sector_count	= -1;
		flash_info[0].size		= 0;
		flash_info[1].size		= 0;
		return (0);
	}

	debug  ("## Before remap: "
		"BR0: 0x%08x    OR0: 0x%08x    "
		"BR1: 0x%08x    OR1: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0,
		memctl->memc_br1, memctl->memc_or1);

	/* Remap FLASH according to real size */
	memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
				OR_CSNT_SAM | OR_ACS_DIV1;
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V;

	debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0);

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

	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

	flash_info[0].size = size_b0;

#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[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_SECT_SIZE-1,
		      &flash_info[0]);
#endif

	if (size_b1) {
		memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
					OR_CSNT_SAM | OR_ACS_DIV1;
		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
					BR_PS_32 | BR_V;

		debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
			memctl->memc_br1, memctl->memc_or1);

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
					  &flash_info[1]);

		flash_info[1].size = size_b1;

		flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);

#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[1]);
#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_SECT_SIZE-1,
			      &flash_info[1]);
#endif
	} else {
		memctl->memc_br1 = 0;		/* invalidate bank */
		memctl->memc_or1 = 0;		/* invalidate bank */

		debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
			memctl->memc_br1, memctl->memc_or1);

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
		flash_info[1].size = 0;
	}

	debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	return (size_b0 + size_b1);
}

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

	if (info->flash_id == FLASH_UNKNOWN) {
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_INTEL:
	    for (i = 0; i < info->sector_count; i++) {
		info->start[i] = base;
		base += 0x00020000 * 2;		/* 128k * 2 chips per bank */
	    }
	    return;

	default:
	    printf ("Don't know sector ofsets for flash type 0x%lx\n",
		info->flash_id);
	    return;
	}
}

/*-----------------------------------------------------------------------
 */
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_SST:	printf ("SST ");		break;
	case FLASH_MAN_STM:	printf ("STM ");		break;
	case FLASH_MAN_INTEL:	printf ("Intel ");		break;
	case FLASH_MAN_MT:	printf ("MT ");			break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F320J3A:	printf ("28F320J3A (32Mbit = 128K x 32)\n");
				break;
	case FLASH_28F640J3A:	printf ("28F640J3A (64Mbit = 128K x 64)\n");
				break;
	case FLASH_28F128J3A:	printf ("28F128J3A (128Mbit = 128K x 128)\n");
				break;
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	if (info->size >= (1 << 20)) {
		i = 20;
	} else {
		i = 10;
	}
	printf ("  Size: %ld %cB in %d Sectors\n",
		info->size >> i,
		(i == 20) ? 'M' : 'k',
		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)
{
	ulong value;

	/* Read Manufacturer ID */
	addr[0] = 0x00900090;
	value = addr[0];

	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);

	switch (value) {
	case AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case SST_MANUFACT:
		info->flash_id = FLASH_MAN_SST;
		break;
	case STM_MANUFACT:
		info->flash_id = FLASH_MAN_STM;
		break;
	case INTEL_MANUFACT:
		info->flash_id = FLASH_MAN_INTEL;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = 0x00FF00FF;		/* restore read mode */
		return (0);			/* no or unknown flash	*/
	}

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

	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);

	switch (value) {
	case INTEL_ID_28F320J3A:
		info->flash_id += FLASH_28F320J3A;
		info->sector_count = 32;
		info->size = 0x00400000 * 2;
		break;				/* =>  8 MB		*/

	case INTEL_ID_28F640J3A:
		info->flash_id += FLASH_28F640J3A;
		info->sector_count = 64;
		info->size = 0x00800000 * 2;
		break;				/* => 16 MB		*/

	case INTEL_ID_28F128J3A:
		info->flash_id += FLASH_28F128J3A;
		info->sector_count = 128;
		info->size = 0x01000000 * 2;
		break;				/* => 32 MB		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		addr[0] = 0x00FF00FF;		/* restore read mode */
		return (0);			/* => no or unknown flash */

	}

	if (info->sector_count > CFG_MAX_FLASH_SECT) {
		printf ("** ERROR: sector count %d > max (%d) **\n",
			info->sector_count, CFG_MAX_FLASH_SECT);
		info->sector_count = CFG_MAX_FLASH_SECT;
	}

	addr[0] = 0x00FF00FF;		/* restore read mode */

	return (info->size);
}


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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	int flag, prot, sect;
	ulong start, now, last;

	debug ("flash_erase: first: %d last: %d\n", s_first, 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_VENDMASK) != FLASH_MAN_INTEL) {
		printf ("Can erase only Intel flash types - 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");
	}

	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 */
			vu_long *addr = (vu_long *)(info->start[sect]);
			unsigned long status;

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

			*addr = 0x00600060;	/* clear lock bit setup */
			*addr = 0x00D000D0;	/* clear lock bit confirm */

			udelay (1000);
			/* This takes awfully long - up to 50 ms and more */
			while (((status = *addr) & 0x00800080) != 0x00800080) {
				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					*addr = 0x00FF00FF; /* reset to read mode */
					return 1;
				}

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

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

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

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

			while (((status = *addr) & 0x00800080) != 0x00800080) {
				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					*addr = 0x00B000B0; /* suspend erase	  */
					*addr = 0x00FF00FF; /* reset to read mode */
					return 1;
				}

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

			*addr = 0x00FF00FF;	/* reset to read mode */
		}
	}
	printf (" done\n");
	return 0;
}

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

#define	FLASH_WIDTH	4	/* flash bus width in bytes */

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

	if (info->flash_id == FLASH_UNKNOWN) {
		return 4;
	}

	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

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

	/*
	 * handle FLASH_WIDTH aligned part
	 */
#ifdef CFG_FLASH_USE_BUFFER_WRITE
	while(cnt >= FLASH_WIDTH) {
		i = CFG_FLASH_BUFFER_SIZE > cnt ?
		    (cnt & ~(FLASH_WIDTH - 1)) : CFG_FLASH_BUFFER_SIZE;
		if((rc = write_data_buf(info, wp, src,i)) != 0)
			return rc;
		wp += i;
		src += i;
		cnt -=i;
	}
#else
	while (cnt >= FLASH_WIDTH) {
		data = 0;
		for (i=0; i<FLASH_WIDTH; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_data(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += FLASH_WIDTH;
		cnt -= FLASH_WIDTH;
	}
#endif /* CFG_FLASH_USE_BUFFER_WRITE */

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

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

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

/*-----------------------------------------------------------------------
 * Check flash status, returns:
 * 0 - OK
 * 1 - timeout
 */
static int flash_status_check(vu_long *addr, ulong tout, char * prompt)
{
	ulong status;
	ulong start;

	/* Wait for command completion */
	start = get_timer (0);
	while(((status = *addr) & 0x00800080) != 0x00800080) {
		if (get_timer(start) > tout) {
			printf("Flash %s timeout at address %p\n", prompt, addr);
			*addr = 0x00FF00FF;	/* restore read mode */
			return (1);
		}
	}
	return 0;
}

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

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

	*addr = 0x00400040;		/* write setup */
	*addr = data;

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

	if (flash_status_check(addr, CFG_FLASH_WRITE_TOUT, "write") != 0) {
		return (1);
	}

	*addr = 0x00FF00FF;	/* restore read mode */

	return (0);
}

#ifdef CFG_FLASH_USE_BUFFER_WRITE
/*-----------------------------------------------------------------------
 * Write a buffer to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 */
static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
{
	vu_long *addr = (vu_long *)dest;
	int sector;
	int cnt;
	int retcode;
	vu_long * src = (vu_long *)cp;
	vu_long * dst = (vu_long *)dest;

	/* find sector */
	for(sector = info->sector_count - 1; sector >= 0; sector--) {
		if(dest >= info->start[sector])
			break;
	}

	*addr = 0x00500050;		/* clear status */
	*addr = 0x00e800e8;		/* write buffer */

	if((retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
					 "write to buffer")) == 0) {
		cnt = len / FLASH_WIDTH;
		*addr = (cnt-1) | ((cnt-1) << 16);
		while(cnt-- > 0) {
			*dst++ = *src++;
		}
		*addr = 0x00d000d0;		/* write buffer confirm */
		retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
						 "buffer write");
	}
	*addr = 0x00FF00FF;	/* restore read mode */
	*addr = 0x00500050;	/* clear status */
	return retcode;
}
#endif /* CFG_USE_FLASH_BUFFER_WRITE */

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
a17d0ff4 WD	1	/*
	2	* (C) Copyright 2001
	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	/* #define DEBUG */
	25
	26	#include <common.h>
	27	#include <mpc8xx.h>
	28
5a1aceb0	29	#if defined(CONFIG_ENV_IS_IN_FLASH)
0e8d1586 JCPV	30	# ifndef CONFIG_ENV_ADDR
0e8d1586 JCPV	31	# define CONFIG_ENV_ADDR (CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
a17d0ff4	32	# endif
0e8d1586 JCPV	33	# ifndef CONFIG_ENV_SIZE
0e8d1586 JCPV	34	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
a17d0ff4	35	# endif
0e8d1586 JCPV	36	# ifndef CONFIG_ENV_SECT_SIZE
0e8d1586 JCPV	37	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
a17d0ff4 WD	38	# endif
	39	#endif
	40
	41	/---------------------------------------------------------------------/
	42
	43	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	44
	45	/*-----------------------------------------------------------------------
	46	* Functions
	47	*/
	48	static ulong flash_get_size (vu_long addr, flash_info_t info);
	49	static int write_data (flash_info_t *info, ulong dest, ulong data);
c837dcb1 WD	50	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	51	static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
	52	#endif
a17d0ff4 WD	53	static void flash_get_offsets (ulong base, flash_info_t *info);
	54
	55	/*-----------------------------------------------------------------------
	56	*/
	57
	58	unsigned long flash_init (void)
	59	{
	60	volatile immap_t immap = (immap_t )CFG_IMMR;
	61	volatile memctl8xx_t *memctl = &immap->im_memctl;
	62	unsigned long size_b0, size_b1;
	63	int i;
	64
	65	/* Init: no FLASHes known */
	66	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	67	flash_info[i].flash_id = FLASH_UNKNOWN;
	68	}
	69
	70	/* Static FLASH Bank configuration here - FIXME XXX */
	71
	72	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
	73
	74	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
	75
	76	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	77	printf ("## Unknown FLASH on Bank 0: "
	78	"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
	79	flash_info[0].flash_id,
	80	size_b0, size_b0<<20);
	81	}
	82
	83	debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
	84
	85	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
	86
	87	debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
	88
	89	if (size_b1 > size_b0) {
	90	printf ("## ERROR: "
	91	"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
	92	size_b1, size_b1<<20,
	93	size_b0, size_b0<<20
	94	);
	95	flash_info[0].flash_id = FLASH_UNKNOWN;
	96	flash_info[1].flash_id = FLASH_UNKNOWN;
	97	flash_info[0].sector_count = -1;
	98	flash_info[1].sector_count = -1;
	99	flash_info[0].size = 0;
	100	flash_info[1].size = 0;
	101	return (0);
	102	}
	103
	104	debug ("## Before remap: "
	105	"BR0: 0x%08x OR0: 0x%08x "
	106	"BR1: 0x%08x OR1: 0x%08x\n",
	107	memctl->memc_br0, memctl->memc_or0,
	108	memctl->memc_br1, memctl->memc_or1);
	109
	110	/* Remap FLASH according to real size */
	111	memctl->memc_or0 = (-size_b0 & 0xFFFF8000) \| CFG_OR_TIMING_FLASH \|
	112	OR_CSNT_SAM \| OR_ACS_DIV1;
	113	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_PS_32 \| BR_V;
	114
	115	debug ("## BR0: 0x%08x OR0: 0x%08x\n",
	116	memctl->memc_br0, memctl->memc_or0);
117
118	/* Re-do sizing to get full correct info */
119	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
120
121	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
122
123	flash_info[0].size = size_b0;
124
125	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
126	/* monitor protection ON by default */
127	flash_protect(FLAG_PROTECT_SET,
128	CFG_MONITOR_BASE,
3b57fe0a	129	CFG_MONITOR_BASE+monitor_flash_len-1,
a17d0ff4 WD	130	&flash_info[0]);
	131	#endif
	132
5a1aceb0	133	#ifdef CONFIG_ENV_IS_IN_FLASH
a17d0ff4 WD	134	/* ENV protection ON by default */
a17d0ff4 WD	135	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	136	CONFIG_ENV_ADDR,
0e8d1586 JCPV	137	CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
a17d0ff4 WD	138	&flash_info[0]);
	139	#endif
	140
	141	if (size_b1) {
	142	memctl->memc_or1 = (-size_b1 & 0xFFFF8000) \| CFG_OR_TIMING_FLASH \|
	143	OR_CSNT_SAM \| OR_ACS_DIV1;
	144	memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) \|
	145	BR_PS_32 \| BR_V;
	146
	147	debug ("## BR1: 0x%08x OR1: 0x%08x\n",
	148	memctl->memc_br1, memctl->memc_or1);
	149
	150	/* Re-do sizing to get full correct info */
	151	size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
	152	&flash_info[1]);
	153
	154	flash_info[1].size = size_b1;
	155
	156	flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
	157
	158	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	159	/* monitor protection ON by default */
	160	flash_protect(FLAG_PROTECT_SET,
	161	CFG_MONITOR_BASE,
3b57fe0a	162	CFG_MONITOR_BASE+monitor_flash_len-1,
a17d0ff4 WD	163	&flash_info[1]);
	164	#endif
	165
5a1aceb0	166	#ifdef CONFIG_ENV_IS_IN_FLASH
a17d0ff4 WD	167	/* ENV protection ON by default */
a17d0ff4 WD	168	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	169	CONFIG_ENV_ADDR,
0e8d1586 JCPV	170	CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
a17d0ff4 WD	171	&flash_info[1]);
	172	#endif
	173	} else {
	174	memctl->memc_br1 = 0; /* invalidate bank */
	175	memctl->memc_or1 = 0; /* invalidate bank */
	176
	177	debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n",
	178	memctl->memc_br1, memctl->memc_or1);
	179
	180	flash_info[1].flash_id = FLASH_UNKNOWN;
	181	flash_info[1].sector_count = -1;
	182	flash_info[1].size = 0;
	183	}
	184
	185	debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
	186
	187	return (size_b0 + size_b1);
	188	}
	189
	190	/*-----------------------------------------------------------------------
	191	*/
	192	static void flash_get_offsets (ulong base, flash_info_t *info)
	193	{
	194	int i;
	195
	196	if (info->flash_id == FLASH_UNKNOWN) {
	197	return;
	198	}
	199
	200	switch (info->flash_id & FLASH_VENDMASK) {
	201	case FLASH_MAN_INTEL:
	202	for (i = 0; i < info->sector_count; i++) {
	203	info->start[i] = base;
	204	base += 0x00020000 * 2; /* 128k * 2 chips per bank */
	205	}
	206	return;
	207
	208	default:
	209	printf ("Don't know sector ofsets for flash type 0x%lx\n",
	210	info->flash_id);
	211	return;
	212	}
	213	}
	214
	215	/*-----------------------------------------------------------------------
	216	*/
	217	void flash_print_info (flash_info_t *info)
	218	{
	219	int i;
	220
	221	if (info->flash_id == FLASH_UNKNOWN) {
	222	printf ("missing or unknown FLASH type\n");
	223	return;
	224	}
	225
	226	switch (info->flash_id & FLASH_VENDMASK) {
	227	case FLASH_MAN_AMD: printf ("AMD "); break;
	228	case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
	229	case FLASH_MAN_SST: printf ("SST "); break;
	230	case FLASH_MAN_STM: printf ("STM "); break;
	231	case FLASH_MAN_INTEL: printf ("Intel "); break;
	232	case FLASH_MAN_MT: printf ("MT "); break;
	233	default: printf ("Unknown Vendor "); break;
	234	}
235
236	switch (info->flash_id & FLASH_TYPEMASK) {
237	case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n");
238	break;
239	case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n");
240	break;
241	case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n");
242	break;
243	default: printf ("Unknown Chip Type\n");
244	break;
245	}
246
247	if (info->size >= (1 << 20)) {
248	i = 20;
249	} else {
250	i = 10;
251	}
252	printf (" Size: %ld %cB in %d Sectors\n",
253	info->size >> i,
254	(i == 20) ? 'M' : 'k',
255	info->sector_count);
256
257	printf (" Sector Start Addresses:");
258	for (i=0; i<info->sector_count; ++i) {
259	if ((i % 5) == 0)
260	printf ("\n ");
261	printf (" %08lX%s",
262	info->start[i],
263	info->protect[i] ? " (RO)" : " "
264	);
265	}
266	printf ("\n");
267	return;
268	}
269
270	/*-----------------------------------------------------------------------
271	*/
272
273
274	/*-----------------------------------------------------------------------
275	*/
276
277	/*
278	* The following code cannot be run from FLASH!
279	*/
280
281	static ulong flash_get_size (vu_long addr, flash_info_t info)
282	{
283	ulong value;
284
285	/* Read Manufacturer ID */
286	addr[0] = 0x00900090;
287	value = addr[0];
288
289	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
290
291	switch (value) {
292	case AMD_MANUFACT:
293	info->flash_id = FLASH_MAN_AMD;
294	break;
295	case FUJ_MANUFACT:
296	info->flash_id = FLASH_MAN_FUJ;
297	break;
298	case SST_MANUFACT:
299	info->flash_id = FLASH_MAN_SST;
300	break;
301	case STM_MANUFACT:
302	info->flash_id = FLASH_MAN_STM;
303	break;
304	case INTEL_MANUFACT:
305	info->flash_id = FLASH_MAN_INTEL;
306	break;
307	default:
308	info->flash_id = FLASH_UNKNOWN;
309	info->sector_count = 0;
310	info->size = 0;
311	addr[0] = 0x00FF00FF; /* restore read mode */
312	return (0); /* no or unknown flash */
313	}
314
315	value = addr[1]; /* device ID */
316
317	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
318
319	switch (value) {
320	case INTEL_ID_28F320J3A:
321	info->flash_id += FLASH_28F320J3A;
322	info->sector_count = 32;
323	info->size = 0x00400000 * 2;
324	break; /* => 8 MB */
325
326	case INTEL_ID_28F640J3A:
327	info->flash_id += FLASH_28F640J3A;
328	info->sector_count = 64;
329	info->size = 0x00800000 * 2;
330	break; /* => 16 MB */
331
332	case INTEL_ID_28F128J3A:
333	info->flash_id += FLASH_28F128J3A;
334	info->sector_count = 128;
335	info->size = 0x01000000 * 2;
336	break; /* => 32 MB */
337
338	default:
339	info->flash_id = FLASH_UNKNOWN;
340	addr[0] = 0x00FF00FF; /* restore read mode */
341	return (0); /* => no or unknown flash */
342
343	}
344
345	if (info->sector_count > CFG_MAX_FLASH_SECT) {
346	printf (" ERROR: sector count %d > max (%d) \n",
347	info->sector_count, CFG_MAX_FLASH_SECT);
348	info->sector_count = CFG_MAX_FLASH_SECT;
349	}
350
351	addr[0] = 0x00FF00FF; /* restore read mode */
352
353	return (info->size);
354	}
355
356
357	/*-----------------------------------------------------------------------
358	*/
359
360	int flash_erase (flash_info_t *info, int s_first, int s_last)
361	{
362	int flag, prot, sect;
363	ulong start, now, last;
364
365	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
366
367	if ((s_first < 0) \|\| (s_first > s_last)) {
368	if (info->flash_id == FLASH_UNKNOWN) {
369	printf ("- missing\n");
370	} else {
371	printf ("- no sectors to erase\n");
372	}
373	return 1;
374	}
375
376	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
377	printf ("Can erase only Intel flash types - aborted\n");
378	return 1;
379	}
380
381	prot = 0;
382	for (sect=s_first; sect<=s_last; ++sect) {
383	if (info->protect[sect]) {
384	prot++;
385	}
386	}
387
388	if (prot) {
389	printf ("- Warning: %d protected sectors will not be erased!\n",
390	prot);
391	} else {
392	printf ("\n");
393	}
394
395	start = get_timer (0);
396	last = start;
397	/* Start erase on unprotected sectors */
398	for (sect = s_first; sect<=s_last; sect++) {
399	if (info->protect[sect] == 0) { /* not protected */
400	vu_long addr = (vu_long )(info->start[sect]);
401	unsigned long status;
402
403	/* Disable interrupts which might cause a timeout here */
404	flag = disable_interrupts();
405
31a64923 WD	406	addr = 0x00600060; / clear lock bit setup */
	407	addr = 0x00D000D0; / clear lock bit confirm */
	408
	409	udelay (1000);
	410	/* This takes awfully long - up to 50 ms and more */
	411	while (((status = *addr) & 0x00800080) != 0x00800080) {
	412	if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
	413	printf ("Timeout\n");
	414	addr = 0x00FF00FF; / reset to read mode */
	415	return 1;
	416	}
	417
	418	/* show that we're waiting */
	419	if ((now - last) > 1000) { /* every second */
	420	putc ('.');
	421	last = now;
	422	}
	423	udelay (1000); /* to trigger the watchdog */
	424	}
	425
a17d0ff4 WD	426	addr = 0x00500050; / clear status register */
	427	addr = 0x00200020; / erase setup */
	428	addr = 0x00D000D0; / erase confirm */
	429
	430	/* re-enable interrupts if necessary */
	431	if (flag)
	432	enable_interrupts();
	433
	434	/* wait at least 80us - let's wait 1 ms */
	435	udelay (1000);
	436
	437	while (((status = *addr) & 0x00800080) != 0x00800080) {
	438	if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
	439	printf ("Timeout\n");
	440	addr = 0x00B000B0; / suspend erase */
	441	addr = 0x00FF00FF; / reset to read mode */
	442	return 1;
	443	}
	444
	445	/* show that we're waiting */
	446	if ((now - last) > 1000) { /* every second */
	447	putc ('.');
	448	last = now;
	449	}
31a64923	450	udelay (1000); /* to trigger the watchdog */
a17d0ff4 WD	451	}
	452
	453	addr = 0x00FF00FF; / reset to read mode */
	454	}
	455	}
	456	printf (" done\n");
	457	return 0;
	458	}
	459
	460	/*-----------------------------------------------------------------------
	461	* Copy memory to flash, returns:
	462	* 0 - OK
	463	* 1 - write timeout
	464	* 2 - Flash not erased
	465	* 4 - Flash not identified
	466	*/
	467
	468	#define FLASH_WIDTH 4 /* flash bus width in bytes */
	469
	470	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	471	{
	472	ulong cp, wp, data;
	473	int i, l, rc;
	474
	475	if (info->flash_id == FLASH_UNKNOWN) {
	476	return 4;
	477	}
	478
	479	wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */
	480
	481	/*
	482	* handle unaligned start bytes
	483	*/
	484	if ((l = addr - wp) != 0) {
	485	data = 0;
	486	for (i=0, cp=wp; i<l; ++i, ++cp) {
	487	data = (data << 8) \| ((uchar )cp);
	488	}
	489	for (; i<FLASH_WIDTH && cnt>0; ++i) {
	490	data = (data << 8) \| *src++;
	491	--cnt;
	492	++cp;
	493	}
	494	for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
	495	data = (data << 8) \| ((uchar )cp);
	496	}
	497
	498	if ((rc = write_data(info, wp, data)) != 0) {
	499	return (rc);
	500	}
	501	wp += FLASH_WIDTH;
	502	}
	503
	504	/*
	505	* handle FLASH_WIDTH aligned part
	506	*/
c837dcb1 WD	507	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	508	while(cnt >= FLASH_WIDTH) {
	509	i = CFG_FLASH_BUFFER_SIZE > cnt ?
	510	(cnt & ~(FLASH_WIDTH - 1)) : CFG_FLASH_BUFFER_SIZE;
	511	if((rc = write_data_buf(info, wp, src,i)) != 0)
	512	return rc;
	513	wp += i;
	514	src += i;
	515	cnt -=i;
	516	}
	517	#else
a17d0ff4 WD	518	while (cnt >= FLASH_WIDTH) {
	519	data = 0;
	520	for (i=0; i<FLASH_WIDTH; ++i) {
	521	data = (data << 8) \| *src++;
	522	}
	523	if ((rc = write_data(info, wp, data)) != 0) {
	524	return (rc);
	525	}
	526	wp += FLASH_WIDTH;
	527	cnt -= FLASH_WIDTH;
	528	}
c837dcb1	529	#endif /* CFG_FLASH_USE_BUFFER_WRITE */
a17d0ff4 WD	530
	531	if (cnt == 0) {
	532	return (0);
	533	}
	534
	535	/*
	536	* handle unaligned tail bytes
	537	*/
	538	data = 0;
	539	for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
	540	data = (data << 8) \| *src++;
	541	--cnt;
	542	}
	543	for (; i<FLASH_WIDTH; ++i, ++cp) {
	544	data = (data << 8) \| ((uchar )cp);
	545	}
	546
	547	return (write_data(info, wp, data));
	548	}
	549
c837dcb1 WD	550	/*-----------------------------------------------------------------------
	551	* Check flash status, returns:
	552	* 0 - OK
	553	* 1 - timeout
	554	*/
	555	static int flash_status_check(vu_long addr, ulong tout, char prompt)
	556	{
	557	ulong status;
	558	ulong start;
	559
	560	/* Wait for command completion */
	561	start = get_timer (0);
	562	while(((status = *addr) & 0x00800080) != 0x00800080) {
	563	if (get_timer(start) > tout) {
	564	printf("Flash %s timeout at address %p\n", prompt, addr);
	565	addr = 0x00FF00FF; / restore read mode */
	566	return (1);
	567	}
	568	}
	569	return 0;
	570	}
	571
a17d0ff4 WD	572	/*-----------------------------------------------------------------------
	573	* Write a word to Flash, returns:
	574	* 0 - OK
	575	* 1 - write timeout
	576	* 2 - Flash not erased
	577	*/
	578	static int write_data (flash_info_t *info, ulong dest, ulong data)
	579	{
	580	vu_long addr = (vu_long )dest;
a17d0ff4 WD	581	int flag;
	582
	583	/* Check if Flash is (sufficiently) erased */
	584	if ((*addr & data) != data) {
	585	return (2);
	586	}
	587	/* Disable interrupts which might cause a timeout here */
	588	flag = disable_interrupts();
	589
	590	addr = 0x00400040; / write setup */
	591	*addr = data;
	592
	593	/* re-enable interrupts if necessary */
	594	if (flag)
	595	enable_interrupts();
	596
c837dcb1 WD	597	if (flash_status_check(addr, CFG_FLASH_WRITE_TOUT, "write") != 0) {
c837dcb1 WD	598	return (1);
a17d0ff4 WD	599	}
	600
	601	addr = 0x00FF00FF; / restore read mode */
	602
	603	return (0);
	604	}
	605
c837dcb1 WD	606	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	607	/*-----------------------------------------------------------------------
	608	* Write a buffer to Flash, returns:
	609	* 0 - OK
	610	* 1 - write timeout
	611	*/
	612	static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
	613	{
	614	vu_long addr = (vu_long )dest;
	615	int sector;
	616	int cnt;
	617	int retcode;
	618	vu_long * src = (vu_long *)cp;
	619	vu_long * dst = (vu_long *)dest;
	620
	621	/* find sector */
	622	for(sector = info->sector_count - 1; sector >= 0; sector--) {
	623	if(dest >= info->start[sector])
	624	break;
	625	}
	626
	627	addr = 0x00500050; / clear status */
	628	addr = 0x00e800e8; / write buffer */
	629
	630	if((retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
	631	"write to buffer")) == 0) {
	632	cnt = len / FLASH_WIDTH;
	633	*addr = (cnt-1) \| ((cnt-1) << 16);
	634	while(cnt-- > 0) {
	635	dst++ = src++;
	636	}
	637	addr = 0x00d000d0; / write buffer confirm */
	638	retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
	639	"buffer write");
	640	}
	641	addr = 0x00FF00FF; / restore read mode */
	642	addr = 0x00500050; / clear status */
	643	return retcode;
	644	}
	645	#endif /* CFG_USE_FLASH_BUFFER_WRITE */
	646
a17d0ff4 WD	647	/*-----------------------------------------------------------------------
a17d0ff4 WD	648	*/