[u-boot.git] / board / emk / common / flash.c

/*
 * (C) Copyright 2003
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * (C) Copyright 2003
 * Reinhard Meyer, EMK Elektronik GmbH, [email protected]
 *
 * 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>

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

#if defined (CONFIG_TOP860)
  typedef unsigned short FLASH_PORT_WIDTH;
  typedef volatile unsigned short FLASH_PORT_WIDTHV;
  #define	FLASH_ID_MASK	0xFF

  #define FPW	FLASH_PORT_WIDTH
  #define FPWV	FLASH_PORT_WIDTHV

  #define FLASH_CYCLE1	0x0555
  #define FLASH_CYCLE2	0x02aa
  #define FLASH_ID1		0
  #define FLASH_ID2		1
  #define FLASH_ID3		0x0e
  #define FLASH_ID4		0x0F
#endif

#if defined (CONFIG_TOP5200) && !defined (CONFIG_LITE5200)
  typedef unsigned char FLASH_PORT_WIDTH;
  typedef volatile unsigned char FLASH_PORT_WIDTHV;
  #define	FLASH_ID_MASK	0xFF

  #define FPW	FLASH_PORT_WIDTH
  #define FPWV	FLASH_PORT_WIDTHV

  #define FLASH_CYCLE1	0x0aaa
  #define FLASH_CYCLE2	0x0555
  #define FLASH_ID1		0
  #define FLASH_ID2		2
  #define FLASH_ID3		0x1c
  #define FLASH_ID4		0x1E
#endif

#if defined (CONFIG_TOP5200) && defined (CONFIG_LITE5200)
  typedef unsigned char FLASH_PORT_WIDTH;
  typedef volatile unsigned char FLASH_PORT_WIDTHV;
  #define	FLASH_ID_MASK	0xFF

  #define FPW	FLASH_PORT_WIDTH
  #define FPWV	FLASH_PORT_WIDTHV

  #define FLASH_CYCLE1	0x0555
  #define FLASH_CYCLE2	0x02aa
  #define FLASH_ID1		0
  #define FLASH_ID2		1
  #define FLASH_ID3		0x0E
  #define FLASH_ID4		0x0F
#endif

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size(FPWV *addr, flash_info_t *info);
static void flash_reset(flash_info_t *info);
static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
static flash_info_t *flash_get_info(ulong base);

/*-----------------------------------------------------------------------
 * flash_init()
 *
 * sets up flash_info and returns size of FLASH (bytes)
 */
unsigned long flash_init (void)
{
	unsigned long size = 0;
	int i = 0;
	extern void flash_preinit(void);
	extern void flash_afterinit(uint, ulong, ulong);
	ulong flashbase = CFG_FLASH_BASE;

	flash_preinit();

	/* There is only ONE FLASH device */
	memset(&flash_info[i], 0, sizeof(flash_info_t));
	flash_info[i].size =
			flash_get_size((FPW *)flashbase, &flash_info[i]);
	size += flash_info[i].size;

#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_get_info(CFG_MONITOR_BASE));
#endif

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
		      flash_get_info(CONFIG_ENV_ADDR));
#endif


	flash_afterinit(i, flash_info[i].start[0], flash_info[i].size);
	return size ? size : 1;
}

/*-----------------------------------------------------------------------
 */
static void flash_reset(flash_info_t *info)
{
	FPWV *base = (FPWV *)(info->start[0]);

	/* Put FLASH back in read mode */
	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
		*base = (FPW)0x00FF00FF;	/* Intel Read Mode */
	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
		*base = (FPW)0x00F000F0;	/* AMD Read Mode */
}

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

static flash_info_t *flash_get_info(ulong base)
{
	int i;
	flash_info_t * info;

	for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
		info = & flash_info[i];
		if (info->size &&
			info->start[0] <= base && base <= info->start[0] + info->size - 1)
			break;
	}

	return i == CFG_MAX_FLASH_BANKS ? 0 : info;
}

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

void flash_print_info (flash_info_t *info)
{
	int i;
	uchar *boottype;
	uchar *bootletter;
	char *fmt;
	uchar botbootletter[] = "B";
	uchar topbootletter[] = "T";
	uchar botboottype[] = "bottom boot sector";
	uchar topboottype[] = "top boot sector";

	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;
#if 0
	case FLASH_MAN_BM:	printf ("BRIGHT MICRO ");	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;
#endif
	default:		printf ("Unknown Vendor ");	break;
	}

	/* check for top or bottom boot, if it applies */
	if (info->flash_id & FLASH_BTYPE) {
		boottype = botboottype;
		bootletter = botbootletter;
	}
	else {
		boottype = topboottype;
		bootletter = topbootletter;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM160T:
	case FLASH_AM160B:
		fmt = "29LV160%s (16 Mbit, %s)\n";
		break;
	case FLASH_AMLV640U:
		fmt = "29LV640M (64 Mbit)\n";
		break;
	case FLASH_AMDLV065D:
		fmt = "29LV065D (64 Mbit)\n";
		break;
	case FLASH_AMLV256U:
		fmt = "29LV256M (256 Mbit)\n";
		break;
	default:
		fmt = "Unknown Chip Type\n";
		break;
	}

	printf (fmt, bootletter, boottype);

	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) {
		ulong	size;
		int		erased;
		ulong	*flash = (unsigned long *) info->start[i];

		if ((i % 5) == 0) {
			printf ("\n   ");
		}

		/*
		 * Check if whole sector is erased
		 */
		size =
			(i != (info->sector_count - 1)) ?
			(info->start[i + 1] - info->start[i]) >> 2 :
		(info->start[0] + info->size - info->start[i]) >> 2;

		for (
			flash = (unsigned long *) info->start[i], erased = 1;
				(flash != (unsigned long *) info->start[i] + size) && erased;
					flash++
			)
			erased = *flash == ~0x0UL;

		printf (" %08lX %s %s",
			info->start[i],
			erased ? "E": " ",
			info->protect[i] ? "(RO)" : "    ");
	}

	printf ("\n");
}

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

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

ulong flash_get_size (FPWV *addr, flash_info_t *info)
{
	int		i;

	/* Write auto select command: read Manufacturer ID */
	/* Write auto select command sequence and test FLASH answer */
	addr[FLASH_CYCLE1] = (FPW)0x00AA00AA;	/* for AMD, Intel ignores this */
	addr[FLASH_CYCLE2] = (FPW)0x00550055;	/* for AMD, Intel ignores this */
	addr[FLASH_CYCLE1] = (FPW)0x00900090;	/* selects Intel or AMD */

	/* The manufacturer codes are only 1 byte, so just use 1 byte.
	 * This works for any bus width and any FLASH device width.
	 */
	udelay(100);
	switch (addr[FLASH_ID1] & 0xff) {

	case (uchar)AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;

#if 0
	case (uchar)INTEL_MANUFACT:
		info->flash_id = FLASH_MAN_INTEL;
		break;
#endif

	default:
		printf ("unknown vendor=%x ", addr[FLASH_ID1] & 0xff);
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		break;
	}

	/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
	if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[FLASH_ID2]) {

	case (FPW)AMD_ID_LV160B:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00200000;
		info->start[0] = (ulong)addr;
		info->start[1] = (ulong)addr + 0x4000;
		info->start[2] = (ulong)addr + 0x6000;
		info->start[3] = (ulong)addr + 0x8000;
		for (i = 4; i < info->sector_count; i++)
		{
			info->start[i] = (ulong)addr + 0x10000 * (i-3);
		}
		break;

	case (FPW)AMD_ID_LV065D:
		info->flash_id += FLASH_AMDLV065D;
		info->sector_count = 128;
		info->size = 0x00800000;
		for (i = 0; i < info->sector_count; i++)
		{
			info->start[i] = (ulong)addr + 0x10000 * i;
		}
		break;

	case (FPW)AMD_ID_MIRROR:
		/* MIRROR BIT FLASH, read more ID bytes */
		if ((FPW)addr[FLASH_ID3] == (FPW)AMD_ID_LV640U_2 &&
			(FPW)addr[FLASH_ID4] == (FPW)AMD_ID_LV640U_3)
		{
			info->flash_id += FLASH_AMLV640U;
			info->sector_count = 128;
			info->size = 0x00800000;
			for (i = 0; i < info->sector_count; i++)
			{
				info->start[i] = (ulong)addr + 0x10000 * i;
			}
			break;
		}
		if ((FPW)addr[FLASH_ID3] == (FPW)AMD_ID_LV256U_2 &&
			(FPW)addr[FLASH_ID4] == (FPW)AMD_ID_LV256U_3)
		{
			/* attention: only the first 16 MB will be used in u-boot */
			info->flash_id += FLASH_AMLV256U;
			info->sector_count = 256;
			info->size = 0x01000000;
			for (i = 0; i < info->sector_count; i++)
			{
				info->start[i] = (ulong)addr + 0x10000 * i;
			}
			break;
		}

		/* fall thru to here ! */
	default:
		printf ("unknown AMD device=%x %x %x",
			(FPW)addr[FLASH_ID2],
			(FPW)addr[FLASH_ID3],
			(FPW)addr[FLASH_ID4]);
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0x800000;
		break;
	}

	/* Put FLASH back in read mode */
	flash_reset(info);

	return (info->size);
}

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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	FPWV *addr;
	int flag, prot, sect;
	int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
	ulong start, now, last;
	int rcode = 0;

	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;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM160B:
	case FLASH_AMLV640U:
		break;
	case FLASH_UNKNOWN:
	default:
		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");
	}

	last  = get_timer(0);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last && rcode == 0; sect++) {

		if (info->protect[sect] != 0)	/* protected, skip it */
			continue;

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

		addr = (FPWV *)(info->start[sect]);
		if (intel) {
			*addr = (FPW)0x00500050; /* clear status register */
			*addr = (FPW)0x00200020; /* erase setup */
			*addr = (FPW)0x00D000D0; /* erase confirm */
		}
		else {
			/* must be AMD style if not Intel */
			FPWV *base;		/* first address in bank */

			base = (FPWV *)(info->start[0]);
			base[FLASH_CYCLE1] = (FPW)0x00AA00AA;	/* unlock */
			base[FLASH_CYCLE2] = (FPW)0x00550055;	/* unlock */
			base[FLASH_CYCLE1] = (FPW)0x00800080;	/* erase mode */
			base[FLASH_CYCLE1] = (FPW)0x00AA00AA;	/* unlock */
			base[FLASH_CYCLE2] = (FPW)0x00550055;	/* unlock */
			*addr = (FPW)0x00300030;	/* erase sector */
		}

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

		start = get_timer(0);

		/* wait at least 50us for AMD, 80us for Intel.
		 * Let's wait 1 ms.
		 */
		udelay (1000);

		while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
			if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
				printf ("Timeout\n");

				if (intel) {
					/* suspend erase	*/
					*addr = (FPW)0x00B000B0;
				}

				flash_reset(info);	/* reset to read mode */
				rcode = 1;		/* failed */
				break;
			}

			/* show that we're waiting */
			if ((get_timer(last)) > CFG_HZ) {/* every second */
				putc ('.');
				last = get_timer(0);
			}
		}

		/* show that we're waiting */
		if ((get_timer(last)) > CFG_HZ) {	/* every second */
			putc ('.');
			last = get_timer(0);
		}

		flash_reset(info);	/* reset to read mode */
	}

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

/*-----------------------------------------------------------------------
 * 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)
{
	FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
	int bytes;	  /* number of bytes to program in current word		*/
	int left;	  /* number of bytes left to program			*/
	int i, res;

	for (left = cnt, res = 0;
		 left > 0 && res == 0;
		 addr += sizeof(data), left -= sizeof(data) - bytes) {

		bytes = addr & (sizeof(data) - 1);
		addr &= ~(sizeof(data) - 1);

		/* combine source and destination data so can program
		 * an entire word of 16 or 32 bits
		 */
		for (i = 0; i < sizeof(data); i++) {
			data <<= 8;
			if (i < bytes || i - bytes >= left )
				data += *((uchar *)addr + i);
			else
				data += *src++;
		}

		/* write one word to the flash */
		switch (info->flash_id & FLASH_VENDMASK) {
		case FLASH_MAN_AMD:
			res = write_word_amd(info, (FPWV *)addr, data);
			break;
		default:
			/* unknown flash type, error! */
			printf ("missing or unknown FLASH type\n");
			res = 1;	/* not really a timeout, but gives error */
			break;
		}
	}

	return (res);
}

/*-----------------------------------------------------------------------
 * Write a word to Flash for AMD FLASH
 * A word is 16 or 32 bits, whichever the bus width of the flash bank
 * (not an individual chip) is.
 *
 * returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
{
	ulong start;
	int flag;
	int res = 0;	/* result, assume success	*/
	FPWV *base;		/* first address in flash bank	*/

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


	base = (FPWV *)(info->start[0]);

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

	base[FLASH_CYCLE1] = (FPW)0x00AA00AA;	/* unlock */
	base[FLASH_CYCLE2] = (FPW)0x00550055;	/* unlock */
	base[FLASH_CYCLE1] = (FPW)0x00A000A0;	/* selects program mode */

	*dest = data;		/* start programming the data	*/

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

	start = get_timer (0);

	/* data polling for D7 */
	while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			*dest = (FPW)0x00F000F0;	/* reset bank */
			res = 1;
		}
	}

	return (res);
}
Commit	Line	Data
1c43771b WD	1	/*
	2	* (C) Copyright 2003
	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	4	*
	5	* (C) Copyright 2003
	6	* Reinhard Meyer, EMK Elektronik GmbH, [email protected]
	7	*
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of
	14	* the License, or (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	* MA 02111-1307 USA
	25	*/
	26
	27	#include <common.h>
	28
	29	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	30
63e73c9a WD	31	#if defined (CONFIG_TOP860)
	32	typedef unsigned short FLASH_PORT_WIDTH;
	33	typedef volatile unsigned short FLASH_PORT_WIDTHV;
	34	#define FLASH_ID_MASK 0xFF
	35
	36	#define FPW FLASH_PORT_WIDTH
	37	#define FPWV FLASH_PORT_WIDTHV
	38
	39	#define FLASH_CYCLE1 0x0555
	40	#define FLASH_CYCLE2 0x02aa
	41	#define FLASH_ID1 0
	42	#define FLASH_ID2 1
4d13cbad WD	43	#define FLASH_ID3 0x0e
4d13cbad WD	44	#define FLASH_ID4 0x0F
63e73c9a WD	45	#endif
63e73c9a WD	46
4d13cbad	47	#if defined (CONFIG_TOP5200) && !defined (CONFIG_LITE5200)
63e73c9a WD	48	typedef unsigned char FLASH_PORT_WIDTH;
	49	typedef volatile unsigned char FLASH_PORT_WIDTHV;
	50	#define FLASH_ID_MASK 0xFF
1c43771b	51
63e73c9a WD	52	#define FPW FLASH_PORT_WIDTH
63e73c9a WD	53	#define FPWV FLASH_PORT_WIDTHV
1c43771b	54
63e73c9a WD	55	#define FLASH_CYCLE1 0x0aaa
	56	#define FLASH_CYCLE2 0x0555
	57	#define FLASH_ID1 0
	58	#define FLASH_ID2 2
4d13cbad WD	59	#define FLASH_ID3 0x1c
	60	#define FLASH_ID4 0x1E
	61	#endif
	62
	63	#if defined (CONFIG_TOP5200) && defined (CONFIG_LITE5200)
	64	typedef unsigned char FLASH_PORT_WIDTH;
	65	typedef volatile unsigned char FLASH_PORT_WIDTHV;
	66	#define FLASH_ID_MASK 0xFF
	67
	68	#define FPW FLASH_PORT_WIDTH
	69	#define FPWV FLASH_PORT_WIDTHV
	70
	71	#define FLASH_CYCLE1 0x0555
	72	#define FLASH_CYCLE2 0x02aa
	73	#define FLASH_ID1 0
	74	#define FLASH_ID2 1
	75	#define FLASH_ID3 0x0E
	76	#define FLASH_ID4 0x0F
63e73c9a	77	#endif
1c43771b WD	78
	79	/*-----------------------------------------------------------------------
	80	* Functions
	81	*/
	82	static ulong flash_get_size(FPWV addr, flash_info_t info);
	83	static void flash_reset(flash_info_t *info);
	84	static int write_word_amd(flash_info_t info, FPWV dest, FPW data);
	85	static flash_info_t *flash_get_info(ulong base);
	86
	87	/*-----------------------------------------------------------------------
	88	* flash_init()
	89	*
	90	* sets up flash_info and returns size of FLASH (bytes)
	91	*/
	92	unsigned long flash_init (void)
	93	{
	94	unsigned long size = 0;
	95	int i = 0;
	96	extern void flash_preinit(void);
	97	extern void flash_afterinit(uint, ulong, ulong);
	98	ulong flashbase = CFG_FLASH_BASE;
	99
	100	flash_preinit();
	101
	102	/* There is only ONE FLASH device */
	103	memset(&flash_info[i], 0, sizeof(flash_info_t));
	104	flash_info[i].size =
	105	flash_get_size((FPW *)flashbase, &flash_info[i]);
	106	size += flash_info[i].size;
	107
	108	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	109	/* monitor protection ON by default */
	110	flash_protect(FLAG_PROTECT_SET,
	111	CFG_MONITOR_BASE,
	112	CFG_MONITOR_BASE+monitor_flash_len-1,
	113	flash_get_info(CFG_MONITOR_BASE));
	114	#endif
	115
5a1aceb0	116	#ifdef CONFIG_ENV_IS_IN_FLASH
1c43771b WD	117	/* ENV protection ON by default */
1c43771b WD	118	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	119	CONFIG_ENV_ADDR,
	120	CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
	121	flash_get_info(CONFIG_ENV_ADDR));
1c43771b WD	122	#endif
	123
	124
	125	flash_afterinit(i, flash_info[i].start[0], flash_info[i].size);
	126	return size ? size : 1;
	127	}
	128
	129	/*-----------------------------------------------------------------------
	130	*/
	131	static void flash_reset(flash_info_t *info)
	132	{
	133	FPWV base = (FPWV )(info->start[0]);
	134
	135	/* Put FLASH back in read mode */
	136	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
	137	base = (FPW)0x00FF00FF; / Intel Read Mode */
	138	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
	139	base = (FPW)0x00F000F0; / AMD Read Mode */
	140	}
	141
	142	/*-----------------------------------------------------------------------
	143	*/
	144
	145	static flash_info_t *flash_get_info(ulong base)
	146	{
	147	int i;
	148	flash_info_t * info;
	149
	150	for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
	151	info = & flash_info[i];
	152	if (info->size &&
	153	info->start[0] <= base && base <= info->start[0] + info->size - 1)
	154	break;
	155	}
	156
	157	return i == CFG_MAX_FLASH_BANKS ? 0 : info;
	158	}
	159
	160	/*-----------------------------------------------------------------------
	161	*/
	162
	163	void flash_print_info (flash_info_t *info)
	164	{
	165	int i;
	166	uchar *boottype;
	167	uchar *bootletter;
77ddac94	168	char *fmt;
1c43771b WD	169	uchar botbootletter[] = "B";
	170	uchar topbootletter[] = "T";
	171	uchar botboottype[] = "bottom boot sector";
	172	uchar topboottype[] = "top boot sector";
	173
	174	if (info->flash_id == FLASH_UNKNOWN) {
	175	printf ("missing or unknown FLASH type\n");
	176	return;
	177	}
	178
	179	switch (info->flash_id & FLASH_VENDMASK) {
	180	case FLASH_MAN_AMD: printf ("AMD "); break;
	181	#if 0
	182	case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
	183	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	184	case FLASH_MAN_SST: printf ("SST "); break;
	185	case FLASH_MAN_STM: printf ("STM "); break;
	186	case FLASH_MAN_INTEL: printf ("INTEL "); break;
	187	#endif
	188	default: printf ("Unknown Vendor "); break;
	189	}
	190
	191	/* check for top or bottom boot, if it applies */
	192	if (info->flash_id & FLASH_BTYPE) {
	193	boottype = botboottype;
	194	bootletter = botbootletter;
	195	}
	196	else {
	197	boottype = topboottype;
	198	bootletter = topbootletter;
	199	}
	200
	201	switch (info->flash_id & FLASH_TYPEMASK) {
	202	case FLASH_AM160T:
	203	case FLASH_AM160B:
	204	fmt = "29LV160%s (16 Mbit, %s)\n";
	205	break;
4d13cbad WD	206	case FLASH_AMLV640U:
	207	fmt = "29LV640M (64 Mbit)\n";
	208	break;
	209	case FLASH_AMDLV065D:
	210	fmt = "29LV065D (64 Mbit)\n";
	211	break;
	212	case FLASH_AMLV256U:
	213	fmt = "29LV256M (256 Mbit)\n";
	214	break;
1c43771b WD	215	default:
	216	fmt = "Unknown Chip Type\n";
	217	break;
	218	}
	219
	220	printf (fmt, bootletter, boottype);
	221
	222	printf (" Size: %ld MB in %d Sectors\n",
	223	info->size >> 20,
	224	info->sector_count);
	225
	226	printf (" Sector Start Addresses:");
	227
	228	for (i=0; i<info->sector_count; ++i) {
63e73c9a WD	229	ulong size;
	230	int erased;
	231	ulong flash = (unsigned long ) info->start[i];
	232
1c43771b WD	233	if ((i % 5) == 0) {
	234	printf ("\n ");
	235	}
	236
63e73c9a WD	237	/*
	238	* Check if whole sector is erased
	239	*/
	240	size =
	241	(i != (info->sector_count - 1)) ?
	242	(info->start[i + 1] - info->start[i]) >> 2 :
	243	(info->start[0] + info->size - info->start[i]) >> 2;
	244
	245	for (
	246	flash = (unsigned long *) info->start[i], erased = 1;
	247	(flash != (unsigned long *) info->start[i] + size) && erased;
	248	flash++
	249	)
	250	erased = *flash == ~0x0UL;
	251
	252	printf (" %08lX %s %s",
	253	info->start[i],
	254	erased ? "E": " ",
	255	info->protect[i] ? "(RO)" : " ");
1c43771b WD	256	}
	257
	258	printf ("\n");
	259	}
	260
	261	/*-----------------------------------------------------------------------
	262	*/
	263
	264	/*
	265	* The following code cannot be run from FLASH!
	266	*/
	267
	268	ulong flash_get_size (FPWV addr, flash_info_t info)
	269	{
	270	int i;
1c43771b WD	271
	272	/* Write auto select command: read Manufacturer ID */
	273	/* Write auto select command sequence and test FLASH answer */
	274	addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */
	275	addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */
	276	addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */
	277
	278	/* The manufacturer codes are only 1 byte, so just use 1 byte.
	279	* This works for any bus width and any FLASH device width.
	280	*/
	281	udelay(100);
63e73c9a	282	switch (addr[FLASH_ID1] & 0xff) {
1c43771b WD	283
	284	case (uchar)AMD_MANUFACT:
	285	info->flash_id = FLASH_MAN_AMD;
	286	break;
	287
	288	#if 0
	289	case (uchar)INTEL_MANUFACT:
	290	info->flash_id = FLASH_MAN_INTEL;
	291	break;
	292	#endif
	293
	294	default:
63e73c9a	295	printf ("unknown vendor=%x ", addr[FLASH_ID1] & 0xff);
1c43771b WD	296	info->flash_id = FLASH_UNKNOWN;
	297	info->sector_count = 0;
	298	info->size = 0;
	299	break;
	300	}
	301
	302	/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
63e73c9a	303	if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[FLASH_ID2]) {
1c43771b WD	304
	305	case (FPW)AMD_ID_LV160B:
	306	info->flash_id += FLASH_AM160B;
	307	info->sector_count = 35;
	308	info->size = 0x00200000;
4d13cbad WD	309	info->start[0] = (ulong)addr;
	310	info->start[1] = (ulong)addr + 0x4000;
	311	info->start[2] = (ulong)addr + 0x6000;
	312	info->start[3] = (ulong)addr + 0x8000;
1c43771b WD	313	for (i = 4; i < info->sector_count; i++)
1c43771b WD	314	{
4d13cbad	315	info->start[i] = (ulong)addr + 0x10000 * (i-3);
1c43771b WD	316	}
	317	break;
	318
4d13cbad WD	319	case (FPW)AMD_ID_LV065D:
	320	info->flash_id += FLASH_AMDLV065D;
	321	info->sector_count = 128;
	322	info->size = 0x00800000;
	323	for (i = 0; i < info->sector_count; i++)
	324	{
	325	info->start[i] = (ulong)addr + 0x10000 * i;
	326	}
	327	break;
	328
	329	case (FPW)AMD_ID_MIRROR:
	330	/* MIRROR BIT FLASH, read more ID bytes */
	331	if ((FPW)addr[FLASH_ID3] == (FPW)AMD_ID_LV640U_2 &&
	332	(FPW)addr[FLASH_ID4] == (FPW)AMD_ID_LV640U_3)
	333	{
	334	info->flash_id += FLASH_AMLV640U;
	335	info->sector_count = 128;
	336	info->size = 0x00800000;
	337	for (i = 0; i < info->sector_count; i++)
	338	{
	339	info->start[i] = (ulong)addr + 0x10000 * i;
	340	}
	341	break;
	342	}
	343	if ((FPW)addr[FLASH_ID3] == (FPW)AMD_ID_LV256U_2 &&
	344	(FPW)addr[FLASH_ID4] == (FPW)AMD_ID_LV256U_3)
	345	{
	346	/* attention: only the first 16 MB will be used in u-boot */
	347	info->flash_id += FLASH_AMLV256U;
	348	info->sector_count = 256;
	349	info->size = 0x01000000;
	350	for (i = 0; i < info->sector_count; i++)
	351	{
	352	info->start[i] = (ulong)addr + 0x10000 * i;
	353	}
	354	break;
	355	}
42dfe7a1	356
4d13cbad	357	/* fall thru to here ! */
1c43771b	358	default:
4d13cbad WD	359	printf ("unknown AMD device=%x %x %x",
	360	(FPW)addr[FLASH_ID2],
	361	(FPW)addr[FLASH_ID3],
	362	(FPW)addr[FLASH_ID4]);
1c43771b WD	363	info->flash_id = FLASH_UNKNOWN;
1c43771b WD	364	info->sector_count = 0;
4d13cbad WD	365	info->size = 0x800000;
4d13cbad WD	366	break;
1c43771b WD	367	}
	368
	369	/* Put FLASH back in read mode */
	370	flash_reset(info);
	371
	372	return (info->size);
	373	}
	374
	375	/*-----------------------------------------------------------------------
	376	*/
	377
	378	int flash_erase (flash_info_t *info, int s_first, int s_last)
	379	{
	380	FPWV *addr;
	381	int flag, prot, sect;
	382	int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
	383	ulong start, now, last;
	384	int rcode = 0;
	385
	386	if ((s_first < 0) \|\| (s_first > s_last)) {
	387	if (info->flash_id == FLASH_UNKNOWN) {
	388	printf ("- missing\n");
	389	} else {
	390	printf ("- no sectors to erase\n");
	391	}
	392	return 1;
	393	}
	394
	395	switch (info->flash_id & FLASH_TYPEMASK) {
	396	case FLASH_AM160B:
4d13cbad	397	case FLASH_AMLV640U:
1c43771b WD	398	break;
	399	case FLASH_UNKNOWN:
	400	default:
	401	printf ("Can't erase unknown flash type %08lx - aborted\n",
	402	info->flash_id);
	403	return 1;
	404	}
	405
	406	prot = 0;
	407	for (sect=s_first; sect<=s_last; ++sect) {
	408	if (info->protect[sect]) {
	409	prot++;
	410	}
	411	}
	412
	413	if (prot) {
	414	printf ("- Warning: %d protected sectors will not be erased!\n",
	415	prot);
	416	} else {
	417	printf ("\n");
	418	}
	419
	420	last = get_timer(0);
	421
	422	/* Start erase on unprotected sectors */
	423	for (sect = s_first; sect<=s_last && rcode == 0; sect++) {
	424
	425	if (info->protect[sect] != 0) /* protected, skip it */
	426	continue;
	427
	428	/* Disable interrupts which might cause a timeout here */
	429	flag = disable_interrupts();
	430
	431	addr = (FPWV *)(info->start[sect]);
	432	if (intel) {
	433	addr = (FPW)0x00500050; / clear status register */
	434	addr = (FPW)0x00200020; / erase setup */
	435	addr = (FPW)0x00D000D0; / erase confirm */
	436	}
	437	else {
	438	/* must be AMD style if not Intel */
	439	FPWV base; / first address in bank */
	440
	441	base = (FPWV *)(info->start[0]);
	442	base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
	443	base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
	444	base[FLASH_CYCLE1] = (FPW)0x00800080; /* erase mode */
	445	base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
	446	base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
	447	addr = (FPW)0x00300030; / erase sector */
	448	}
	449
	450	/* re-enable interrupts if necessary */
	451	if (flag)
	452	enable_interrupts();
	453
	454	start = get_timer(0);
	455
	456	/* wait at least 50us for AMD, 80us for Intel.
	457	* Let's wait 1 ms.
	458	*/
	459	udelay (1000);
	460
	461	while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
462	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
463	printf ("Timeout\n");
464
465	if (intel) {
466	/* suspend erase */
467	*addr = (FPW)0x00B000B0;
468	}
469
470	flash_reset(info); /* reset to read mode */
471	rcode = 1; /* failed */
472	break;
473	}
474
475	/* show that we're waiting */
476	if ((get_timer(last)) > CFG_HZ) {/* every second */
477	putc ('.');
478	last = get_timer(0);
479	}
480	}
481
482	/* show that we're waiting */
483	if ((get_timer(last)) > CFG_HZ) { /* every second */
484	putc ('.');
485	last = get_timer(0);
486	}
487
488	flash_reset(info); /* reset to read mode */
489	}
490
491	printf (" done\n");
492	return rcode;
493	}
494
495	/*-----------------------------------------------------------------------
496	* Copy memory to flash, returns:
497	* 0 - OK
498	* 1 - write timeout
499	* 2 - Flash not erased
500	*/
501	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
502	{
503	FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
504	int bytes; /* number of bytes to program in current word */
505	int left; /* number of bytes left to program */
506	int i, res;
507
508	for (left = cnt, res = 0;
509	left > 0 && res == 0;
510	addr += sizeof(data), left -= sizeof(data) - bytes) {
511
512	bytes = addr & (sizeof(data) - 1);
513	addr &= ~(sizeof(data) - 1);
514
515	/* combine source and destination data so can program
516	* an entire word of 16 or 32 bits
517	*/
518	for (i = 0; i < sizeof(data); i++) {
519	data <<= 8;
520	if (i < bytes \|\| i - bytes >= left )
521	data += ((uchar )addr + i);
522	else
523	data += *src++;
524	}
525
526	/* write one word to the flash */
527	switch (info->flash_id & FLASH_VENDMASK) {
528	case FLASH_MAN_AMD:
529	res = write_word_amd(info, (FPWV *)addr, data);
530	break;
531	default:
532	/* unknown flash type, error! */
533	printf ("missing or unknown FLASH type\n");
534	res = 1; /* not really a timeout, but gives error */
535	break;
536	}
537	}
538
539	return (res);
540	}
541
542	/*-----------------------------------------------------------------------
543	* Write a word to Flash for AMD FLASH
544	* A word is 16 or 32 bits, whichever the bus width of the flash bank
545	* (not an individual chip) is.
546	*
547	* returns:
548	* 0 - OK
549	* 1 - write timeout
550	* 2 - Flash not erased
551	*/
552	static int write_word_amd (flash_info_t info, FPWV dest, FPW data)
553	{
554	ulong start;
555	int flag;
556	int res = 0; /* result, assume success */
557	FPWV base; / first address in flash bank */
558
559	/* Check if Flash is (sufficiently) erased */
560	if ((*dest & data) != data) {
561	return (2);
562	}
563
564
565	base = (FPWV *)(info->start[0]);
566
567	/* Disable interrupts which might cause a timeout here */
568	flag = disable_interrupts();
569
570	base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
571	base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
572	base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */
573
574	dest = data; / start programming the data */
575
576	/* re-enable interrupts if necessary */
577	if (flag)
578	enable_interrupts();
579
580	start = get_timer (0);
581
582	/* data polling for D7 */
583	while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
584	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
585	dest = (FPW)0x00F000F0; / reset bank */
586	res = 1;
587	}
588	}
589
590	return (res);
591	}