[J-u-boot.git] / board / cmc_pu2 / flash.c

/*
 * (C) Copyright 2003-2004
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * (C) Copyright 2004
 * Martin Krause, TQ-Systems GmbH, [email protected]
 *
 * Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
 * [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>

#ifndef	CFG_ENV_ADDR
#define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
#endif

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

#define FLASH_CYCLE1	0x0555
#define FLASH_CYCLE2	0x02AA

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size(vu_short *addr, flash_info_t *info);
static void flash_reset(flash_info_t *info);
static int write_word_amd(flash_info_t *info, vu_short *dest, ushort 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;
	ulong flashbase = CFG_FLASH_BASE;

	/* Init: no FLASHes known */
	memset(&flash_info[0], 0, sizeof(flash_info_t));

	flash_info[0].size = flash_get_size((vu_short *)flashbase, &flash_info[0]);

	size = flash_info[0].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	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_get_info(CFG_ENV_ADDR));
#endif

	return size ? size : 1;
}

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

	/* Put FLASH back in read mode */
	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
		*base = 0x00FF;	/* Intel Read Mode */
	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
		*base = 0x00F0;	/* AMD Read Mode */
}

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

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

	info = NULL;
	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;

	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_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;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_S29GL064M:
		printf ("S29GL064M-R6 (64Mbit, uniform sector size)\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!
 */

ulong flash_get_size (vu_short *addr, flash_info_t *info)
{
	int i;
	ushort value;
	ulong base = (ulong)addr;

	/* Write auto select command sequence */
	addr[FLASH_CYCLE1] = 0x00AA;	/* for AMD, Intel ignores this */
	addr[FLASH_CYCLE2] = 0x0055;	/* for AMD, Intel ignores this */
	addr[FLASH_CYCLE1] = 0x0090;	/* selects Intel or AMD */

	/* read Manufacturer ID */
	udelay(100);
	value = addr[0];
	debug ("Manufacturer ID: %04X\n", value);

	switch (value) {

	case (AMD_MANUFACT & 0xFFFF):
		debug ("Manufacturer: AMD (Spansion)\n");
		info->flash_id = FLASH_MAN_AMD;
		break;

	case (INTEL_MANUFACT & 0xFFFF):
		debug ("Manufacturer: Intel (not supported yet)\n");
		info->flash_id = FLASH_MAN_INTEL;
		break;

	default:
		printf ("Unknown Manufacturer ID: %04X\n", value);
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		goto out;
	}

	value = addr[1];
	debug ("Device ID: %04X\n", value);

	switch (addr[1]) {

	case (AMD_ID_MIRROR & 0xFFFF):
		debug ("Mirror Bit flash: addr[14] = %08X  addr[15] = %08X\n",
			addr[14], addr[15]);

		switch(addr[14]) {
		case (AMD_ID_GL064M_2 & 0xFFFF):
			if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
				printf ("Chip: S29GLxxxM -> unknown\n");
				info->flash_id = FLASH_UNKNOWN;
				info->sector_count = 0;
				info->size = 0;
			} else {
				debug ("Chip: S29GL064M-R6\n");
				info->flash_id += FLASH_S29GL064M;
				info->sector_count = 128;
				info->size = 0x00800000;
				for (i = 0; i < info->sector_count; i++) {
					info->start[i] = base;
					base += 0x10000;
				}
			}
			break;	/* => 16 MB	*/
		default:
			printf ("Chip: *** unknown ***\n");
			info->flash_id = FLASH_UNKNOWN;
			info->sector_count = 0;
			info->size = 0;
			break;
		}
		break;

	default:
		printf ("Unknown Device ID: %04X\n", value);
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		break;
	}

out:
	/* 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)
{
	vu_short *addr = (vu_short *)(info->start[0]);
	int flag, prot, sect, ssect, l_sect;
	ulong 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_UNKNOWN) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		return 1;
	}

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

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

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

	/*
	 * Start erase on unprotected sectors.
	 * Since the flash can erase multiple sectors with one command
	 * we take advantage of that by doing the erase in chunks of
	 * 3 sectors.
	 */
	for (sect = s_first; sect <= s_last; ) {
		l_sect = -1;

		addr[FLASH_CYCLE1] = 0x00AA;
		addr[FLASH_CYCLE2] = 0x0055;
		addr[FLASH_CYCLE1] = 0x0080;
		addr[FLASH_CYCLE1] = 0x00AA;
		addr[FLASH_CYCLE2] = 0x0055;

		/* do the erase in chunks of at most 3 sectors */
		for (ssect = 0; ssect < 3; ssect++) {
			if ((sect + ssect) > s_last)
				break;
			if (info->protect[sect + ssect] == 0) {	/* not protected */
				addr = (vu_short *)(info->start[sect + ssect]);
				addr[0] = 0x0030;
				l_sect = sect + ssect;
			}
		}
		/* wait at least 80us - let's wait 1 ms */
		udelay (1000);

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

		reset_timer_masked ();
		last  = 0;
		addr = (vu_short *)(info->start[l_sect]);
		while ((addr[0] & 0x0080) != 0x0080) {
			if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) {
				printf ("Timeout\n");
				return 1;
			}
			/* show that we're waiting */
			if ((now - last) > 1000) {	/* every second */
				putc ('.');
				last = now;
			}
		}
		addr = (vu_short *)info->start[0];
		addr[0] = 0x00F0;	/* reset bank */
		sect += ssect;
	}

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

DONE:
	/* reset to read mode */
	addr = (vu_short *)info->start[0];
	addr[0] = 0x00F0;	/* reset bank */

	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 wp, data;
	int rc;

	if (addr & 1) {
		printf ("unaligned destination not supported\n");
		return ERR_ALIGN;
	};

	if ((int) src & 1) {
		printf ("unaligned source not supported\n");
		return ERR_ALIGN;
	};

	wp = addr;

	while (cnt >= 2) {
		data = *((vu_short *)src);
		if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
			return (rc);
		}
		src += 2;
		wp += 2;
		cnt -= 2;
	}

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

	if (cnt == 1) {
		data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) << 8);
		if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
			return (rc);
		}
		src += 1;
		wp += 1;
		cnt -= 1;
	}

	return ERR_OK;
}

/*-----------------------------------------------------------------------
 * 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, vu_short *dest, ushort data)
{
	int flag;
	vu_short *base;		/* first address in flash bank	*/

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

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

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

	base[FLASH_CYCLE1] = 0x00AA;	/* unlock */
	base[FLASH_CYCLE2] = 0x0055;	/* unlock */
	base[FLASH_CYCLE1] = 0x00A0;	/* selects program mode */

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

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

	reset_timer_masked ();

	/* data polling for D7 */
	while ((*dest & 0x0080) != (data & 0x0080)) {
		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
			*dest = 0x00F0;	/* reset bank */
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
2cbe571a	1	/*
9d5028c2 WD	2	* (C) Copyright 2003-2004
9d5028c2 WD	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
2cbe571a	4	*
9d5028c2 WD	5	* (C) Copyright 2004
	6	* Martin Krause, TQ-Systems GmbH, [email protected]
	7	*
	8	* Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
	9	* [email protected]
2cbe571a WD	10	*
	11	* See file CREDITS for list of people who contributed to this
	12	* project.
	13	*
	14	* This program is free software; you can redistribute it and/or
	15	* modify it under the terms of the GNU General Public License as
	16	* published by the Free Software Foundation; either version 2 of
	17	* the License, or (at your option) any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	27	* MA 02111-1307 USA
	28	*/
	29
	30	#include <common.h>
	31
45ea3fca WD	32	#ifndef CFG_ENV_ADDR
	33	#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	34	#endif
	35
9d5028c2	36	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
2cbe571a	37
9d5028c2	38	#define FLASH_CYCLE1 0x0555
25d6712a	39	#define FLASH_CYCLE2 0x02AA
2cbe571a WD	40
2cbe571a WD	41	/*-----------------------------------------------------------------------
9d5028c2	42	* Functions
2cbe571a	43	*/
08f27278	44	static ulong flash_get_size(vu_short addr, flash_info_t info);
9d5028c2	45	static void flash_reset(flash_info_t *info);
08f27278	46	static int write_word_amd(flash_info_t info, vu_short dest, ushort data);
9d5028c2	47	static flash_info_t *flash_get_info(ulong base);
2cbe571a	48
9d5028c2 WD	49	/*-----------------------------------------------------------------------
	50	* flash_init()
	51	*
	52	* sets up flash_info and returns size of FLASH (bytes)
	53	*/
	54	unsigned long flash_init (void)
2cbe571a	55	{
9d5028c2 WD	56	unsigned long size = 0;
	57	ulong flashbase = CFG_FLASH_BASE;
	58
	59	/* Init: no FLASHes known */
	60	memset(&flash_info[0], 0, sizeof(flash_info_t));
	61
08f27278	62	flash_info[0].size = flash_get_size((vu_short *)flashbase, &flash_info[0]);
9d5028c2 WD	63
	64	size = flash_info[0].size;
	65
	66	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	67	/* monitor protection ON by default */
	68	flash_protect(FLAG_PROTECT_SET,
	69	CFG_MONITOR_BASE,
	70	CFG_MONITOR_BASE+monitor_flash_len-1,
	71	flash_get_info(CFG_MONITOR_BASE));
	72	#endif
	73
	74	#ifdef CFG_ENV_IS_IN_FLASH
	75	/* ENV protection ON by default */
	76	flash_protect(FLAG_PROTECT_SET,
	77	CFG_ENV_ADDR,
	78	CFG_ENV_ADDR+CFG_ENV_SIZE-1,
	79	flash_get_info(CFG_ENV_ADDR));
	80	#endif
	81
	82	return size ? size : 1;
2cbe571a WD	83	}
2cbe571a WD	84
9d5028c2 WD	85	/*-----------------------------------------------------------------------
	86	*/
	87	static void flash_reset(flash_info_t *info)
2cbe571a	88	{
08f27278	89	vu_short base = (vu_short )(info->start[0]);
2cbe571a	90
9d5028c2 WD	91	/* Put FLASH back in read mode */
9d5028c2 WD	92	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
08f27278	93	base = 0x00FF; / Intel Read Mode */
9d5028c2	94	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
08f27278	95	base = 0x00F0; / AMD Read Mode */
2cbe571a WD	96	}
2cbe571a WD	97
9d5028c2 WD	98	/*-----------------------------------------------------------------------
9d5028c2 WD	99	*/
2cbe571a	100
9d5028c2	101	static flash_info_t *flash_get_info(ulong base)
2cbe571a	102	{
9d5028c2 WD	103	int i;
9d5028c2 WD	104	flash_info_t * info;
2cbe571a	105
9d5028c2 WD	106	info = NULL;
	107	for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
	108	info = & flash_info[i];
	109	if (info->size && info->start[0] <= base &&
	110	base <= info->start[0] + info->size - 1)
	111	break;
2cbe571a WD	112	}
2cbe571a WD	113
9d5028c2	114	return i == CFG_MAX_FLASH_BANKS ? 0 : info;
2cbe571a WD	115	}
	116
	117	/*-----------------------------------------------------------------------
	118	*/
9d5028c2 WD	119
9d5028c2 WD	120	void flash_print_info (flash_info_t *info)
2cbe571a WD	121	{
	122	int i;
	123
9d5028c2 WD	124	if (info->flash_id == FLASH_UNKNOWN) {
	125	printf ("missing or unknown FLASH type\n");
	126	return;
	127	}
	128
2cbe571a	129	switch (info->flash_id & FLASH_VENDMASK) {
9d5028c2 WD	130	case FLASH_MAN_AMD: printf ("AMD "); break;
	131	case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
	132	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	133	case FLASH_MAN_SST: printf ("SST "); break;
	134	case FLASH_MAN_STM: printf ("STM "); break;
	135	case FLASH_MAN_INTEL: printf ("INTEL "); break;
	136	default: printf ("Unknown Vendor "); break;
2cbe571a WD	137	}
	138
	139	switch (info->flash_id & FLASH_TYPEMASK) {
9d5028c2 WD	140	case FLASH_S29GL064M:
9d5028c2 WD	141	printf ("S29GL064M-R6 (64Mbit, uniform sector size)\n");
2cbe571a WD	142	break;
	143	default:
	144	printf ("Unknown Chip Type\n");
2cbe571a WD	145	break;
	146	}
	147
	148	printf (" Size: %ld MB in %d Sectors\n",
9d5028c2 WD	149	info->size >> 20,
9d5028c2 WD	150	info->sector_count);
2cbe571a WD	151
2cbe571a WD	152	printf (" Sector Start Addresses:");
9d5028c2 WD	153
9d5028c2 WD	154	for (i=0; i<info->sector_count; ++i) {
2cbe571a WD	155	if ((i % 5) == 0) {
	156	printf ("\n ");
	157	}
9d5028c2 WD	158	printf (" %08lX%s",
9d5028c2 WD	159	info->start[i],
2cbe571a WD	160	info->protect[i] ? " (RO)" : " ");
	161	}
	162	printf ("\n");
9d5028c2	163	return;
2cbe571a WD	164	}
	165
	166	/*-----------------------------------------------------------------------
	167	*/
	168
9d5028c2 WD	169	/*
	170	* The following code cannot be run from FLASH!
	171	*/
2cbe571a	172
08f27278	173	ulong flash_get_size (vu_short addr, flash_info_t info)
9d5028c2 WD	174	{
9d5028c2 WD	175	int i;
08f27278	176	ushort value;
9d5028c2	177	ulong base = (ulong)addr;
2cbe571a	178
08f27278 WD	179	/* Write auto select command sequence */
	180	addr[FLASH_CYCLE1] = 0x00AA; /* for AMD, Intel ignores this */
	181	addr[FLASH_CYCLE2] = 0x0055; /* for AMD, Intel ignores this */
	182	addr[FLASH_CYCLE1] = 0x0090; /* selects Intel or AMD */
2cbe571a	183
08f27278	184	/* read Manufacturer ID */
9d5028c2	185	udelay(100);
08f27278 WD	186	value = addr[0];
08f27278 WD	187	debug ("Manufacturer ID: %04X\n", value);
2cbe571a	188
08f27278 WD	189	switch (value) {
	190
	191	case (AMD_MANUFACT & 0xFFFF):
45ea3fca	192	debug ("Manufacturer: AMD (Spansion)\n");
9d5028c2 WD	193	info->flash_id = FLASH_MAN_AMD;
9d5028c2 WD	194	break;
2cbe571a	195
08f27278	196	case (INTEL_MANUFACT & 0xFFFF):
45ea3fca	197	debug ("Manufacturer: Intel (not supported yet)\n");
9d5028c2 WD	198	info->flash_id = FLASH_MAN_INTEL;
9d5028c2 WD	199	break;
2cbe571a	200
9d5028c2	201	default:
08f27278	202	printf ("Unknown Manufacturer ID: %04X\n", value);
9d5028c2 WD	203	info->flash_id = FLASH_UNKNOWN;
	204	info->sector_count = 0;
	205	info->size = 0;
08f27278	206	goto out;
9d5028c2	207	}
2cbe571a	208
08f27278 WD	209	value = addr[1];
08f27278 WD	210	debug ("Device ID: %04X\n", value);
9d5028c2	211
08f27278 WD	212	switch (addr[1]) {
	213
	214	case (AMD_ID_MIRROR & 0xFFFF):
45ea3fca	215	debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
9d5028c2 WD	216	addr[14], addr[15]);
9d5028c2 WD	217
08f27278 WD	218	switch(addr[14]) {
08f27278 WD	219	case (AMD_ID_GL064M_2 & 0xFFFF):
9d5028c2 WD	220	if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
	221	printf ("Chip: S29GLxxxM -> unknown\n");
	222	info->flash_id = FLASH_UNKNOWN;
	223	info->sector_count = 0;
	224	info->size = 0;
	225	} else {
45ea3fca	226	debug ("Chip: S29GL064M-R6\n");
9d5028c2 WD	227	info->flash_id += FLASH_S29GL064M;
	228	info->sector_count = 128;
	229	info->size = 0x00800000;
	230	for (i = 0; i < info->sector_count; i++) {
	231	info->start[i] = base;
	232	base += 0x10000;
	233	}
	234	}
	235	break; /* => 16 MB */
	236	default:
	237	printf ("Chip: * unknown *\n");
	238	info->flash_id = FLASH_UNKNOWN;
	239	info->sector_count = 0;
	240	info->size = 0;
	241	break;
	242	}
	243	break;
2cbe571a	244
9d5028c2	245	default:
08f27278	246	printf ("Unknown Device ID: %04X\n", value);
9d5028c2 WD	247	info->flash_id = FLASH_UNKNOWN;
	248	info->sector_count = 0;
	249	info->size = 0;
08f27278	250	break;
9d5028c2	251	}
2cbe571a	252
08f27278	253	out:
9d5028c2 WD	254	/* Put FLASH back in read mode */
9d5028c2 WD	255	flash_reset(info);
2cbe571a	256
9d5028c2 WD	257	return (info->size);
9d5028c2 WD	258	}
2cbe571a	259
9d5028c2 WD	260	/*-----------------------------------------------------------------------
9d5028c2 WD	261	*/
2cbe571a	262
9d5028c2 WD	263	int flash_erase (flash_info_t *info, int s_first, int s_last)
9d5028c2 WD	264	{
08f27278	265	vu_short addr = (vu_short )(info->start[0]);
25d6712a	266	int flag, prot, sect, ssect, l_sect;
e2ffd59b	267	ulong now, last;
2cbe571a	268
45ea3fca	269	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
2cbe571a	270
9d5028c2 WD	271	if ((s_first < 0) \|\| (s_first > s_last)) {
	272	if (info->flash_id == FLASH_UNKNOWN) {
	273	printf ("- missing\n");
	274	} else {
	275	printf ("- no sectors to erase\n");
45ea3fca	276	}
9d5028c2	277	return 1;
45ea3fca	278	}
2cbe571a	279
9d5028c2 WD	280	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	281	(info->flash_id > FLASH_AMD_COMP)) {
	282	printf ("Can't erase unknown flash type %08lx - aborted\n",
	283	info->flash_id);
	284	return 1;
2cbe571a WD	285	}
2cbe571a WD	286
9d5028c2 WD	287	prot = 0;
	288	for (sect=s_first; sect<=s_last; ++sect) {
	289	if (info->protect[sect]) {
	290	prot++;
	291	}
	292	}
2cbe571a	293
9d5028c2 WD	294	if (prot) {
	295	printf ("- Warning: %d protected sectors will not be erased!\n",
	296	prot);
	297	} else {
	298	printf ("\n");
	299	}
2cbe571a	300
9d5028c2 WD	301	/* Disable interrupts which might cause a timeout here */
9d5028c2 WD	302	flag = disable_interrupts();
2cbe571a	303
25d6712a WD	304	/*
	305	* Start erase on unprotected sectors.
	306	* Since the flash can erase multiple sectors with one command
	307	* we take advantage of that by doing the erase in chunks of
	308	* 3 sectors.
	309	*/
	310	for (sect = s_first; sect <= s_last; ) {
	311	l_sect = -1;
	312
	313	addr[FLASH_CYCLE1] = 0x00AA;
	314	addr[FLASH_CYCLE2] = 0x0055;
	315	addr[FLASH_CYCLE1] = 0x0080;
	316	addr[FLASH_CYCLE1] = 0x00AA;
	317	addr[FLASH_CYCLE2] = 0x0055;
	318
	319	/* do the erase in chunks of at most 3 sectors */
	320	for (ssect = 0; ssect < 3; ssect++) {
	321	if ((sect + ssect) > s_last)
	322	break;
	323	if (info->protect[sect + ssect] == 0) { /* not protected */
08f27278	324	addr = (vu_short *)(info->start[sect + ssect]);
25d6712a WD	325	addr[0] = 0x0030;
	326	l_sect = sect + ssect;
	327	}
9d5028c2	328	}
25d6712a WD	329	/* wait at least 80us - let's wait 1 ms */
	330	udelay (1000);
	331
	332	/*
	333	* We wait for the last triggered sector
	334	*/
	335	if (l_sect < 0)
	336	goto DONE;
	337
400ab719	338	reset_timer_masked ();
e2ffd59b	339	last = 0;
08f27278	340	addr = (vu_short *)(info->start[l_sect]);
25d6712a	341	while ((addr[0] & 0x0080) != 0x0080) {
400ab719	342	if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) {
25d6712a WD	343	printf ("Timeout\n");
	344	return 1;
	345	}
	346	/* show that we're waiting */
	347	if ((now - last) > 1000) { /* every second */
	348	putc ('.');
	349	last = now;
	350	}
	351	}
08f27278	352	addr = (vu_short *)info->start[0];
25d6712a WD	353	addr[0] = 0x00F0; /* reset bank */
25d6712a WD	354	sect += ssect;
9d5028c2	355	}
2cbe571a	356
9d5028c2 WD	357	/* re-enable interrupts if necessary */
	358	if (flag)
	359	enable_interrupts();
2cbe571a	360
9d5028c2 WD	361	DONE:
9d5028c2 WD	362	/* reset to read mode */
08f27278	363	addr = (vu_short *)info->start[0];
25d6712a	364	addr[0] = 0x00F0; /* reset bank */
2cbe571a	365
9d5028c2 WD	366	printf (" done\n");
9d5028c2 WD	367	return 0;
2cbe571a WD	368	}
	369
	370	/*-----------------------------------------------------------------------
9d5028c2 WD	371	* Copy memory to flash, returns:
	372	* 0 - OK
	373	* 1 - write timeout
	374	* 2 - Flash not erased
2cbe571a WD	375	*/
2cbe571a WD	376
9d5028c2	377	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
2cbe571a WD	378	{
	379	ulong wp, data;
	380	int rc;
	381
	382	if (addr & 1) {
	383	printf ("unaligned destination not supported\n");
	384	return ERR_ALIGN;
	385	};
	386
	387	if ((int) src & 1) {
	388	printf ("unaligned source not supported\n");
	389	return ERR_ALIGN;
	390	};
	391
	392	wp = addr;
	393
	394	while (cnt >= 2) {
08f27278 WD	395	data = ((vu_short )src);
08f27278 WD	396	if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
400ab719	397	printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
2cbe571a WD	398	return (rc);
	399	}
	400	src += 2;
	401	wp += 2;
	402	cnt -= 2;
	403	}
	404
9d5028c2	405	if (cnt == 0) {
400ab719	406	return (ERR_OK);
9d5028c2 WD	407	}
9d5028c2 WD	408
2cbe571a	409	if (cnt == 1) {
400ab719	410	data = (((volatile u8 ) src)) \| (((volatile u8 ) (wp + 1)) << 8);
08f27278	411	if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
400ab719	412	printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
2cbe571a WD	413	return (rc);
	414	}
	415	src += 1;
	416	wp += 1;
	417	cnt -= 1;
9d5028c2	418	}
2cbe571a WD	419
	420	return ERR_OK;
	421	}
9d5028c2 WD	422
	423	/*-----------------------------------------------------------------------
	424	* Write a word to Flash for AMD FLASH
	425	* A word is 16 or 32 bits, whichever the bus width of the flash bank
	426	* (not an individual chip) is.
	427	*
	428	* returns:
	429	* 0 - OK
	430	* 1 - write timeout
	431	* 2 - Flash not erased
	432	*/
08f27278	433	static int write_word_amd (flash_info_t info, vu_short dest, ushort data)
9d5028c2	434	{
9d5028c2	435	int flag;
08f27278	436	vu_short base; / first address in flash bank */
9d5028c2 WD	437
	438	/* Check if Flash is (sufficiently) erased */
	439	if ((*dest & data) != data) {
	440	return (2);
	441	}
	442
08f27278	443	base = (vu_short *)(info->start[0]);
9d5028c2 WD	444
	445	/* Disable interrupts which might cause a timeout here */
	446	flag = disable_interrupts();
	447
08f27278 WD	448	base[FLASH_CYCLE1] = 0x00AA; /* unlock */
	449	base[FLASH_CYCLE2] = 0x0055; /* unlock */
	450	base[FLASH_CYCLE1] = 0x00A0; /* selects program mode */
9d5028c2 WD	451
	452	dest = data; / start programming the data */
	453
	454	/* re-enable interrupts if necessary */
	455	if (flag)
	456	enable_interrupts();
	457
400ab719	458	reset_timer_masked ();
9d5028c2 WD	459
9d5028c2 WD	460	/* data polling for D7 */
08f27278	461	while ((*dest & 0x0080) != (data & 0x0080)) {
400ab719	462	if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
08f27278	463	dest = 0x00F0; / reset bank */
9d5028c2 WD	464	return (1);
	465	}
	466	}
	467	return (0);
	468	}