[people/ms/u-boot.git] / board / a3000 / 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
 */


#include <common.h>
#include <mpc824x.h>

#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef  CONFIG_ENV_ADDR
#  define CONFIG_ENV_ADDR  (CONFIG_SYS_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


/*---------------------------------------------------------------------*/
#define DEBUG_FLASH

#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/

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

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_char *addr, flash_info_t *info);
static int write_data (flash_info_t *info, uchar *dest, uchar data);
static void flash_get_offsets (ulong base, flash_info_t *info);

#define BS(b)     (b)
#define BYTEME(x) ((x) & 0xFF)

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

unsigned long flash_init (void)
{
	unsigned long flash_banks[CONFIG_SYS_MAX_FLASH_BANKS] = CONFIG_SYS_FLASH_BANKS;
	unsigned long size, size_b[CONFIG_SYS_MAX_FLASH_BANKS];

	int i;

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

		DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
/*
		size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
*/
		size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);

		if (flash_info[i].flash_id == FLASH_UNKNOWN)
		{
			printf ("## Unknown FLASH on Bank %d: "
				"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
				i, flash_info[i].flash_id,
				size_b[i], size_b[i]<<20);
		}
		else
		{
			DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
				i, flash_banks[i], size_b[i]);

			flash_get_offsets (flash_banks[i], &flash_info[i]);
			flash_info[i].size = size_b[i];
		}
	}


#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
	DEBUGF("protect monitor %x @ %x\n", CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN);
	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_SYS_MONITOR_BASE,
		      CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1,
		      &flash_info[0]);
#endif

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	DEBUGF("protect environtment %x @ %x\n", CONFIG_ENV_ADDR, CONFIG_ENV_SECT_SIZE);
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
		      &flash_info[0]);
#endif

	size = 0;
	DEBUGF("## Final Flash bank sizes: ");
	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
	{
		DEBUGF("%08lx ", size_b[i]);
		size += size_b[i];
	}
	DEBUGF("\n");
	return (size);
}

/*-----------------------------------------------------------------------
 */
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;		/* 128k 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 1
	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");
#endif
	return;
}

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


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

/*
 * The following code cannot be run from FLASH!
 */
static ulong flash_get_size (vu_char *addr, flash_info_t *info)
{
	vu_char manuf, device;

	addr[0] = BS(0x90);
	manuf = BS(addr[0]);
	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);

	switch (manuf) {
	case BYTEME(AMD_MANUFACT):
		info->flash_id = FLASH_MAN_AMD;
		break;
	case BYTEME(FUJ_MANUFACT):
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case BYTEME(SST_MANUFACT):
		info->flash_id = FLASH_MAN_SST;
		break;
	case BYTEME(STM_MANUFACT):
		info->flash_id = FLASH_MAN_STM;
		break;
	case BYTEME(INTEL_MANUFACT):
		info->flash_id = FLASH_MAN_INTEL;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = BS(0xFF);		/* restore read mode, (yes, BS is a NOP) */
		return 0;			/* no or unknown flash	*/
	}

	device = BS(addr[2]);			/* device ID		*/

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

	switch (device) {
	case BYTEME(INTEL_ID_28F320J3A):
		info->flash_id += FLASH_28F320J3A;
		info->sector_count = 32;
		info->size = 0x00400000;
		break;				/* =>  4 MB		*/

	case BYTEME(INTEL_ID_28F640J3A):
		info->flash_id += FLASH_28F640J3A;
		info->sector_count = 64;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case BYTEME(INTEL_ID_28F128J3A):
		info->flash_id += FLASH_28F128J3A;
		info->sector_count = 128;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		addr[0] = BS(0xFF);		/* restore read mode (yes, a NOP) */
		return 0;			/* => no or unknown flash */

	}

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

	addr[0] = BS(0xFF);		/* 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;

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

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

			*addr = BS(0x50);	/* clear status register */
			*addr = BS(0x20);	/* erase setup */
			*addr = BS(0xD0);	/* erase confirm */

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

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

			while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
				if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					*addr = BS(0xB0); /* suspend erase	  */
					*addr = BS(0xFF); /* reset to read mode */
					return 1;
				}

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

			*addr = BS(0xFF);	/* 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	1	/* flash bus width in bytes */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	uchar *wp = (uchar *)addr;
	int rc;

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

	while (cnt > 0) {
		if ((rc = write_data(info, wp, *src)) != 0) {
			return rc;
		}
		wp++;
		src++;
		cnt--;
	}

	return cnt;
}

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

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

	*addr = BS(0x40);		/* write setup */
	*addr = data;

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

	start = get_timer (0);

	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			*addr = BS(0xFF);	/* restore read mode */
			return 1;
		}
	}

	*addr = BS(0xFF);	/* restore read mode */

	return 0;
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
0332990b 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
	25	#include <common.h>
	26	#include <mpc824x.h>
	27
5a1aceb0	28	#if defined(CONFIG_ENV_IS_IN_FLASH)
0e8d1586	29	# ifndef CONFIG_ENV_ADDR
6d0f6bcf	30	# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
0332990b	31	# endif
0e8d1586 JCPV	32	# ifndef CONFIG_ENV_SIZE
0e8d1586 JCPV	33	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
0332990b	34	# endif
0e8d1586 JCPV	35	# ifndef CONFIG_ENV_SECT_SIZE
0e8d1586 JCPV	36	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
0332990b WD	37	# endif
	38	#endif
	39
	40
	41	/---------------------------------------------------------------------/
	42	#define DEBUG_FLASH
	43
	44	#ifdef DEBUG_FLASH
	45	#define DEBUGF(fmt,args...) printf(fmt ,##args)
	46	#else
	47	#define DEBUGF(fmt,args...)
	48	#endif
	49	/---------------------------------------------------------------------/
	50
6d0f6bcf	51	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
0332990b WD	52
	53	/*-----------------------------------------------------------------------
	54	* Functions
	55	*/
	56	static ulong flash_get_size (vu_char addr, flash_info_t info);
	57	static int write_data (flash_info_t info, uchar dest, uchar data);
	58	static void flash_get_offsets (ulong base, flash_info_t *info);
	59
	60	#define BS(b) (b)
	61	#define BYTEME(x) ((x) & 0xFF)
	62
	63	/*-----------------------------------------------------------------------
	64	*/
	65
	66	unsigned long flash_init (void)
	67	{
6d0f6bcf JCPV	68	unsigned long flash_banks[CONFIG_SYS_MAX_FLASH_BANKS] = CONFIG_SYS_FLASH_BANKS;
6d0f6bcf JCPV	69	unsigned long size, size_b[CONFIG_SYS_MAX_FLASH_BANKS];
0332990b WD	70
	71	int i;
	72
	73	/* Init: no FLASHes known */
6d0f6bcf	74	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
0332990b WD	75	{
	76	flash_info[i].flash_id = FLASH_UNKNOWN;
	77
	78	DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
	79	/*
	80	size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
	81	*/
	82	size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
	83
8bde7f77	84	if (flash_info[i].flash_id == FLASH_UNKNOWN)
0332990b WD	85	{
	86	printf ("## Unknown FLASH on Bank %d: "
	87	"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
	88	i, flash_info[i].flash_id,
	89	size_b[i], size_b[i]<<20);
	90	}
	91	else
	92	{
	93	DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
	94	i, flash_banks[i], size_b[i]);
	95
	96	flash_get_offsets (flash_banks[i], &flash_info[i]);
	97	flash_info[i].size = size_b[i];
	98	}
	99	}
	100
	101
6d0f6bcf JCPV	102	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
6d0f6bcf JCPV	103	DEBUGF("protect monitor %x @ %x\n", CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN);
0332990b WD	104	/* monitor protection ON by default */
0332990b WD	105	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	106	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	107	CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1,
0332990b WD	108	&flash_info[0]);
	109	#endif
	110
5a1aceb0	111	#ifdef CONFIG_ENV_IS_IN_FLASH
0332990b	112	/* ENV protection ON by default */
0e8d1586	113	DEBUGF("protect environtment %x @ %x\n", CONFIG_ENV_ADDR, CONFIG_ENV_SECT_SIZE);
0332990b	114	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	115	CONFIG_ENV_ADDR,
0e8d1586 JCPV	116	CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
0332990b WD	117	&flash_info[0]);
	118	#endif
	119
	120	size = 0;
	121	DEBUGF("## Final Flash bank sizes: ");
6d0f6bcf	122	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
0332990b WD	123	{
	124	DEBUGF("%08lx ", size_b[i]);
	125	size += size_b[i];
	126	}
	127	DEBUGF("\n");
	128	return (size);
	129	}
	130
	131	/*-----------------------------------------------------------------------
	132	*/
	133	static void flash_get_offsets (ulong base, flash_info_t *info)
	134	{
	135	int i;
	136
	137	if (info->flash_id == FLASH_UNKNOWN) {
	138	return;
	139	}
	140
	141	switch (info->flash_id & FLASH_VENDMASK) {
	142	case FLASH_MAN_INTEL:
	143	for (i = 0; i < info->sector_count; i++) {
	144	info->start[i] = base;
	145	base += 0x00020000; /* 128k per bank */
	146	}
	147	return;
	148
	149	default:
	150	printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
	151	return;
	152	}
	153	}
	154
	155	/*-----------------------------------------------------------------------
	156	*/
	157	void flash_print_info (flash_info_t *info)
	158	{
	159	int i;
	160
	161	if (info->flash_id == FLASH_UNKNOWN) {
	162	printf ("missing or unknown FLASH type\n");
	163	return;
	164	}
	165
	166	switch (info->flash_id & FLASH_VENDMASK) {
	167	case FLASH_MAN_AMD: printf ("AMD "); break;
	168	case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
	169	case FLASH_MAN_SST: printf ("SST "); break;
	170	case FLASH_MAN_STM: printf ("STM "); break;
	171	case FLASH_MAN_INTEL: printf ("Intel "); break;
	172	case FLASH_MAN_MT: printf ("MT "); break;
	173	default: printf ("Unknown Vendor "); break;
	174	}
	175
	176	switch (info->flash_id & FLASH_TYPEMASK) {
8bde7f77	177	case FLASH_28F320J3A:
0332990b WD	178	printf ("28F320J3A (32Mbit = 128K x 32)\n");
0332990b WD	179	break;
8bde7f77	180	case FLASH_28F640J3A:
0332990b WD	181	printf ("28F640J3A (64Mbit = 128K x 64)\n");
0332990b WD	182	break;
8bde7f77	183	case FLASH_28F128J3A:
0332990b WD	184	printf ("28F128J3A (128Mbit = 128K x 128)\n");
0332990b WD	185	break;
8bde7f77	186	default:
0332990b WD	187	printf ("Unknown Chip Type\n");
	188	break;
	189	}
	190
	191	#if 1
	192	if (info->size >= (1 << 20)) {
	193	i = 20;
	194	} else {
	195	i = 10;
	196	}
	197	printf (" Size: %ld %cB in %d Sectors\n",
	198	info->size >> i,
	199	(i == 20) ? 'M' : 'k',
	200	info->sector_count);
	201
	202	printf (" Sector Start Addresses:");
	203	for (i=0; i<info->sector_count; ++i) {
	204	if ((i % 5) == 0)
	205	printf ("\n ");
	206	printf (" %08lX%s",
	207	info->start[i],
	208	info->protect[i] ? " (RO)" : " "
	209	);
	210	}
	211	printf ("\n");
	212	#endif
	213	return;
	214	}
	215
	216	/*-----------------------------------------------------------------------
	217	*/
	218
	219
	220	/*-----------------------------------------------------------------------
	221	*/
	222
	223	/*
	224	* The following code cannot be run from FLASH!
	225	*/
	226	static ulong flash_get_size (vu_char addr, flash_info_t info)
	227	{
	228	vu_char manuf, device;
	229
	230	addr[0] = BS(0x90);
	231	manuf = BS(addr[0]);
	232	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
	233
	234	switch (manuf) {
	235	case BYTEME(AMD_MANUFACT):
	236	info->flash_id = FLASH_MAN_AMD;
	237	break;
	238	case BYTEME(FUJ_MANUFACT):
	239	info->flash_id = FLASH_MAN_FUJ;
	240	break;
	241	case BYTEME(SST_MANUFACT):
	242	info->flash_id = FLASH_MAN_SST;
	243	break;
	244	case BYTEME(STM_MANUFACT):
	245	info->flash_id = FLASH_MAN_STM;
	246	break;
	247	case BYTEME(INTEL_MANUFACT):
	248	info->flash_id = FLASH_MAN_INTEL;
	249	break;
	250	default:
251	info->flash_id = FLASH_UNKNOWN;
252	info->sector_count = 0;
253	info->size = 0;
254	addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
255	return 0; /* no or unknown flash */
256	}
257
258	device = BS(addr[2]); /* device ID */
259
260	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
261
262	switch (device) {
263	case BYTEME(INTEL_ID_28F320J3A):
264	info->flash_id += FLASH_28F320J3A;
265	info->sector_count = 32;
266	info->size = 0x00400000;
267	break; /* => 4 MB */
268
269	case BYTEME(INTEL_ID_28F640J3A):
270	info->flash_id += FLASH_28F640J3A;
271	info->sector_count = 64;
272	info->size = 0x00800000;
273	break; /* => 8 MB */
274
275	case BYTEME(INTEL_ID_28F128J3A):
276	info->flash_id += FLASH_28F128J3A;
277	info->sector_count = 128;
278	info->size = 0x01000000;
279	break; /* => 16 MB */
280
281	default:
282	info->flash_id = FLASH_UNKNOWN;
283	addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
284	return 0; /* => no or unknown flash */
285
286	}
287
6d0f6bcf	288	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
0332990b	289	printf (" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	290	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	291	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
0332990b WD	292	}
	293
	294	addr[0] = BS(0xFF); /* restore read mode */
	295
	296	return (info->size);
	297	}
	298
	299
	300	/*-----------------------------------------------------------------------
	301	*/
	302
	303	int flash_erase (flash_info_t *info, int s_first, int s_last)
	304	{
	305	int flag, prot, sect;
	306	ulong start, now, last;
	307
	308	if ((s_first < 0) \|\| (s_first > s_last)) {
	309	if (info->flash_id == FLASH_UNKNOWN) {
	310	printf ("- missing\n");
	311	} else {
	312	printf ("- no sectors to erase\n");
	313	}
	314	return 1;
	315	}
	316
	317	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
	318	printf ("Can erase only Intel flash types - aborted\n");
	319	return 1;
	320	}
	321
	322	prot = 0;
	323	for (sect=s_first; sect<=s_last; ++sect) {
	324	if (info->protect[sect]) {
	325	prot++;
	326	}
	327	}
	328
	329	if (prot) {
	330	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	331	} else {
	332	printf ("\n");
	333	}
	334
	335	start = get_timer (0);
	336	last = start;
	337	/* Start erase on unprotected sectors */
	338	for (sect = s_first; sect<=s_last; sect++) {
	339	if (info->protect[sect] == 0) { /* not protected */
	340	vu_char addr = (vu_char )(info->start[sect]);
	341	unsigned long status;
	342
	343	/* Disable interrupts which might cause a timeout here */
	344	flag = disable_interrupts();
	345
	346	addr = BS(0x50); / clear status register */
	347	addr = BS(0x20); / erase setup */
	348	addr = BS(0xD0); / erase confirm */
	349
	350	/* re-enable interrupts if necessary */
	351	if (flag) {
	352	enable_interrupts();
	353	}
	354
	355	/* wait at least 80us - let's wait 1 ms */
356	udelay (1000);
357
358	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
6d0f6bcf	359	if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
0332990b WD	360	printf ("Timeout\n");
	361	addr = BS(0xB0); / suspend erase */
	362	addr = BS(0xFF); / reset to read mode */
	363	return 1;
	364	}
	365
	366	/* show that we're waiting */
	367	if ((now - last) > 1000) { /* every second */
	368	putc ('.');
	369	last = now;
	370	}
	371	}
	372
	373	addr = BS(0xFF); / reset to read mode */
	374	}
	375	}
	376	printf (" done\n");
	377	return 0;
	378	}
	379
	380	/*-----------------------------------------------------------------------
	381	* Copy memory to flash, returns:
	382	* 0 - OK
	383	* 1 - write timeout
	384	* 2 - Flash not erased
	385	* 4 - Flash not identified
	386	*/
	387
	388	#define FLASH_WIDTH 1 /* flash bus width in bytes */
	389
	390	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	391	{
	392	uchar wp = (uchar )addr;
	393	int rc;
	394
	395	if (info->flash_id == FLASH_UNKNOWN) {
	396	return 4;
	397	}
	398
	399	while (cnt > 0) {
	400	if ((rc = write_data(info, wp, *src)) != 0) {
	401	return rc;
	402	}
	403	wp++;
	404	src++;
	405	cnt--;
	406	}
	407
	408	return cnt;
	409	}
	410
	411	/*-----------------------------------------------------------------------
	412	* Write a word to Flash, returns:
	413	* 0 - OK
	414	* 1 - write timeout
	415	* 2 - Flash not erased
	416	*/
	417	static int write_data (flash_info_t info, uchar dest, uchar data)
	418	{
	419	vu_char addr = (vu_char )dest;
	420	ulong status;
	421	ulong start;
	422	int flag;
	423
424	/* Check if Flash is (sufficiently) erased */
425	if ((BS(*addr) & data) != data) {
426	return 2;
427	}
428	/* Disable interrupts which might cause a timeout here */
429	flag = disable_interrupts();
430
431	addr = BS(0x40); / write setup */
432	*addr = data;
433
434	/* re-enable interrupts if necessary */
435	if (flag) {
436	enable_interrupts();
437	}
438
439	start = get_timer (0);
440
441	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
6d0f6bcf	442	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
0332990b WD	443	addr = BS(0xFF); / restore read mode */
	444	return 1;
	445	}
	446	}
	447
	448	addr = BS(0xFF); / restore read mode */
	449
	450	return 0;
	451	}
	452
	453	/*-----------------------------------------------------------------------
	454	*/