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

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */


#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	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
0332990b WD	6	*/
	7
	8
	9	#include <common.h>
	10	#include <mpc824x.h>
	11
5a1aceb0	12	#if defined(CONFIG_ENV_IS_IN_FLASH)
0e8d1586	13	# ifndef CONFIG_ENV_ADDR
6d0f6bcf	14	# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
0332990b	15	# endif
0e8d1586 JCPV	16	# ifndef CONFIG_ENV_SIZE
0e8d1586 JCPV	17	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
0332990b	18	# endif
0e8d1586 JCPV	19	# ifndef CONFIG_ENV_SECT_SIZE
0e8d1586 JCPV	20	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
0332990b WD	21	# endif
	22	#endif
	23
	24
	25	/---------------------------------------------------------------------/
	26	#define DEBUG_FLASH
	27
	28	#ifdef DEBUG_FLASH
	29	#define DEBUGF(fmt,args...) printf(fmt ,##args)
	30	#else
	31	#define DEBUGF(fmt,args...)
	32	#endif
	33	/---------------------------------------------------------------------/
	34
6d0f6bcf	35	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
0332990b WD	36
	37	/*-----------------------------------------------------------------------
	38	* Functions
	39	*/
	40	static ulong flash_get_size (vu_char addr, flash_info_t info);
	41	static int write_data (flash_info_t info, uchar dest, uchar data);
	42	static void flash_get_offsets (ulong base, flash_info_t *info);
	43
	44	#define BS(b) (b)
	45	#define BYTEME(x) ((x) & 0xFF)
	46
	47	/*-----------------------------------------------------------------------
	48	*/
	49
	50	unsigned long flash_init (void)
	51	{
6d0f6bcf JCPV	52	unsigned long flash_banks[CONFIG_SYS_MAX_FLASH_BANKS] = CONFIG_SYS_FLASH_BANKS;
6d0f6bcf JCPV	53	unsigned long size, size_b[CONFIG_SYS_MAX_FLASH_BANKS];
0332990b WD	54
	55	int i;
	56
	57	/* Init: no FLASHes known */
6d0f6bcf	58	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
0332990b WD	59	{
	60	flash_info[i].flash_id = FLASH_UNKNOWN;
	61
	62	DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
	63	/*
	64	size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
	65	*/
	66	size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
	67
8bde7f77	68	if (flash_info[i].flash_id == FLASH_UNKNOWN)
0332990b WD	69	{
	70	printf ("## Unknown FLASH on Bank %d: "
	71	"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
	72	i, flash_info[i].flash_id,
	73	size_b[i], size_b[i]<<20);
	74	}
	75	else
	76	{
	77	DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
	78	i, flash_banks[i], size_b[i]);
	79
	80	flash_get_offsets (flash_banks[i], &flash_info[i]);
	81	flash_info[i].size = size_b[i];
	82	}
	83	}
	84
	85
6d0f6bcf JCPV	86	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
6d0f6bcf JCPV	87	DEBUGF("protect monitor %x @ %x\n", CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN);
0332990b WD	88	/* monitor protection ON by default */
0332990b WD	89	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	90	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	91	CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1,
0332990b WD	92	&flash_info[0]);
	93	#endif
	94
5a1aceb0	95	#ifdef CONFIG_ENV_IS_IN_FLASH
0332990b	96	/* ENV protection ON by default */
0e8d1586	97	DEBUGF("protect environtment %x @ %x\n", CONFIG_ENV_ADDR, CONFIG_ENV_SECT_SIZE);
0332990b	98	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	99	CONFIG_ENV_ADDR,
0e8d1586 JCPV	100	CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
0332990b WD	101	&flash_info[0]);
	102	#endif
	103
	104	size = 0;
	105	DEBUGF("## Final Flash bank sizes: ");
6d0f6bcf	106	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
0332990b WD	107	{
	108	DEBUGF("%08lx ", size_b[i]);
	109	size += size_b[i];
	110	}
	111	DEBUGF("\n");
	112	return (size);
	113	}
	114
	115	/*-----------------------------------------------------------------------
	116	*/
	117	static void flash_get_offsets (ulong base, flash_info_t *info)
	118	{
	119	int i;
	120
	121	if (info->flash_id == FLASH_UNKNOWN) {
	122	return;
	123	}
	124
	125	switch (info->flash_id & FLASH_VENDMASK) {
	126	case FLASH_MAN_INTEL:
	127	for (i = 0; i < info->sector_count; i++) {
	128	info->start[i] = base;
	129	base += 0x00020000; /* 128k per bank */
	130	}
	131	return;
	132
	133	default:
	134	printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
	135	return;
	136	}
	137	}
	138
	139	/*-----------------------------------------------------------------------
	140	*/
	141	void flash_print_info (flash_info_t *info)
	142	{
	143	int i;
	144
	145	if (info->flash_id == FLASH_UNKNOWN) {
	146	printf ("missing or unknown FLASH type\n");
	147	return;
	148	}
	149
	150	switch (info->flash_id & FLASH_VENDMASK) {
	151	case FLASH_MAN_AMD: printf ("AMD "); break;
	152	case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
	153	case FLASH_MAN_SST: printf ("SST "); break;
	154	case FLASH_MAN_STM: printf ("STM "); break;
	155	case FLASH_MAN_INTEL: printf ("Intel "); break;
	156	case FLASH_MAN_MT: printf ("MT "); break;
	157	default: printf ("Unknown Vendor "); break;
	158	}
	159
	160	switch (info->flash_id & FLASH_TYPEMASK) {
8bde7f77	161	case FLASH_28F320J3A:
0332990b WD	162	printf ("28F320J3A (32Mbit = 128K x 32)\n");
0332990b WD	163	break;
8bde7f77	164	case FLASH_28F640J3A:
0332990b WD	165	printf ("28F640J3A (64Mbit = 128K x 64)\n");
0332990b WD	166	break;
8bde7f77	167	case FLASH_28F128J3A:
0332990b WD	168	printf ("28F128J3A (128Mbit = 128K x 128)\n");
0332990b WD	169	break;
8bde7f77	170	default:
0332990b WD	171	printf ("Unknown Chip Type\n");
	172	break;
	173	}
	174
	175	#if 1
	176	if (info->size >= (1 << 20)) {
	177	i = 20;
	178	} else {
	179	i = 10;
	180	}
	181	printf (" Size: %ld %cB in %d Sectors\n",
	182	info->size >> i,
	183	(i == 20) ? 'M' : 'k',
	184	info->sector_count);
	185
	186	printf (" Sector Start Addresses:");
	187	for (i=0; i<info->sector_count; ++i) {
	188	if ((i % 5) == 0)
	189	printf ("\n ");
	190	printf (" %08lX%s",
	191	info->start[i],
	192	info->protect[i] ? " (RO)" : " "
	193	);
	194	}
	195	printf ("\n");
	196	#endif
	197	return;
	198	}
	199
	200	/*-----------------------------------------------------------------------
	201	*/
	202
	203
	204	/*-----------------------------------------------------------------------
	205	*/
	206
	207	/*
	208	* The following code cannot be run from FLASH!
	209	*/
	210	static ulong flash_get_size (vu_char addr, flash_info_t info)
	211	{
	212	vu_char manuf, device;
	213
	214	addr[0] = BS(0x90);
	215	manuf = BS(addr[0]);
	216	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
	217
	218	switch (manuf) {
	219	case BYTEME(AMD_MANUFACT):
	220	info->flash_id = FLASH_MAN_AMD;
	221	break;
	222	case BYTEME(FUJ_MANUFACT):
	223	info->flash_id = FLASH_MAN_FUJ;
	224	break;
	225	case BYTEME(SST_MANUFACT):
	226	info->flash_id = FLASH_MAN_SST;
	227	break;
	228	case BYTEME(STM_MANUFACT):
	229	info->flash_id = FLASH_MAN_STM;
	230	break;
	231	case BYTEME(INTEL_MANUFACT):
	232	info->flash_id = FLASH_MAN_INTEL;
	233	break;
	234	default:
235	info->flash_id = FLASH_UNKNOWN;
236	info->sector_count = 0;
237	info->size = 0;
238	addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
239	return 0; /* no or unknown flash */
240	}
241
242	device = BS(addr[2]); /* device ID */
243
244	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
245
246	switch (device) {
247	case BYTEME(INTEL_ID_28F320J3A):
248	info->flash_id += FLASH_28F320J3A;
249	info->sector_count = 32;
250	info->size = 0x00400000;
251	break; /* => 4 MB */
252
253	case BYTEME(INTEL_ID_28F640J3A):
254	info->flash_id += FLASH_28F640J3A;
255	info->sector_count = 64;
256	info->size = 0x00800000;
257	break; /* => 8 MB */
258
259	case BYTEME(INTEL_ID_28F128J3A):
260	info->flash_id += FLASH_28F128J3A;
261	info->sector_count = 128;
262	info->size = 0x01000000;
263	break; /* => 16 MB */
264
265	default:
266	info->flash_id = FLASH_UNKNOWN;
267	addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
268	return 0; /* => no or unknown flash */
269
270	}
271
6d0f6bcf	272	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
0332990b	273	printf (" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	274	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	275	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
0332990b WD	276	}
	277
	278	addr[0] = BS(0xFF); /* restore read mode */
	279
	280	return (info->size);
	281	}
	282
	283
	284	/*-----------------------------------------------------------------------
	285	*/
	286
	287	int flash_erase (flash_info_t *info, int s_first, int s_last)
	288	{
	289	int flag, prot, sect;
	290	ulong start, now, last;
	291
	292	if ((s_first < 0) \|\| (s_first > s_last)) {
	293	if (info->flash_id == FLASH_UNKNOWN) {
	294	printf ("- missing\n");
	295	} else {
	296	printf ("- no sectors to erase\n");
	297	}
	298	return 1;
	299	}
	300
	301	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
	302	printf ("Can erase only Intel flash types - aborted\n");
	303	return 1;
	304	}
	305
	306	prot = 0;
	307	for (sect=s_first; sect<=s_last; ++sect) {
	308	if (info->protect[sect]) {
	309	prot++;
	310	}
	311	}
	312
	313	if (prot) {
	314	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
	315	} else {
	316	printf ("\n");
	317	}
	318
	319	start = get_timer (0);
	320	last = start;
	321	/* Start erase on unprotected sectors */
	322	for (sect = s_first; sect<=s_last; sect++) {
	323	if (info->protect[sect] == 0) { /* not protected */
	324	vu_char addr = (vu_char )(info->start[sect]);
	325	unsigned long status;
	326
	327	/* Disable interrupts which might cause a timeout here */
	328	flag = disable_interrupts();
	329
	330	addr = BS(0x50); / clear status register */
	331	addr = BS(0x20); / erase setup */
	332	addr = BS(0xD0); / erase confirm */
	333
	334	/* re-enable interrupts if necessary */
	335	if (flag) {
	336	enable_interrupts();
	337	}
	338
	339	/* wait at least 80us - let's wait 1 ms */
340	udelay (1000);
341
342	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
6d0f6bcf	343	if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
0332990b WD	344	printf ("Timeout\n");
	345	addr = BS(0xB0); / suspend erase */
	346	addr = BS(0xFF); / reset to read mode */
	347	return 1;
	348	}
	349
	350	/* show that we're waiting */
	351	if ((now - last) > 1000) { /* every second */
	352	putc ('.');
	353	last = now;
	354	}
	355	}
	356
	357	addr = BS(0xFF); / reset to read mode */
	358	}
	359	}
	360	printf (" done\n");
	361	return 0;
	362	}
	363
	364	/*-----------------------------------------------------------------------
	365	* Copy memory to flash, returns:
	366	* 0 - OK
	367	* 1 - write timeout
	368	* 2 - Flash not erased
	369	* 4 - Flash not identified
	370	*/
	371
	372	#define FLASH_WIDTH 1 /* flash bus width in bytes */
	373
	374	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	375	{
	376	uchar wp = (uchar )addr;
	377	int rc;
	378
	379	if (info->flash_id == FLASH_UNKNOWN) {
	380	return 4;
	381	}
	382
	383	while (cnt > 0) {
	384	if ((rc = write_data(info, wp, *src)) != 0) {
	385	return rc;
	386	}
	387	wp++;
	388	src++;
	389	cnt--;
	390	}
	391
	392	return cnt;
	393	}
	394
	395	/*-----------------------------------------------------------------------
	396	* Write a word to Flash, returns:
	397	* 0 - OK
	398	* 1 - write timeout
	399	* 2 - Flash not erased
	400	*/
	401	static int write_data (flash_info_t info, uchar dest, uchar data)
	402	{
	403	vu_char addr = (vu_char )dest;
	404	ulong status;
	405	ulong start;
	406	int flag;
	407
408	/* Check if Flash is (sufficiently) erased */
409	if ((BS(*addr) & data) != data) {
410	return 2;
411	}
412	/* Disable interrupts which might cause a timeout here */
413	flag = disable_interrupts();
414
415	addr = BS(0x40); / write setup */
416	*addr = data;
417
418	/* re-enable interrupts if necessary */
419	if (flag) {
420	enable_interrupts();
421	}
422
423	start = get_timer (0);
424
425	while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
6d0f6bcf	426	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
0332990b WD	427	addr = BS(0xFF); / restore read mode */
	428	return 1;
	429	}
	430	}
	431
	432	addr = BS(0xFF); / restore read mode */
	433
	434	return 0;
	435	}
	436
	437	/*-----------------------------------------------------------------------
	438	*/