[people/ms/u-boot.git] / board / r360mpi / flash.c

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

/* #define DEBUG */

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

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

#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

/*-----------------------------------------------------------------------
 * Protection Flags:
 */
#define FLAG_PROTECT_SET	0x01
#define FLAG_PROTECT_CLEAR	0x02

/* Board support for 1 or 2 flash devices */
#undef FLASH_PORT_WIDTH32
#define FLASH_PORT_WIDTH16

#ifdef FLASH_PORT_WIDTH16
#define FLASH_PORT_WIDTH	ushort
#define FLASH_PORT_WIDTHV	vu_short
#else
#define FLASH_PORT_WIDTH	ulong
#define FLASH_PORT_WIDTHV	vu_long
#endif

#define FPW			FLASH_PORT_WIDTH
#define FPWV			FLASH_PORT_WIDTHV

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

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

unsigned long flash_init (void)
{
	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0;
	int i;

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

	/* Static FLASH Bank configuration here - FIXME XXX */
	size_b0 = flash_get_size ((FPW *) FLASH_BASE0_PRELIM, &flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0 << 20);
	}

	/* Remap FLASH according to real size */
	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;

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

	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);

#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
	/* monitor protection ON by default */
	(void) flash_protect (FLAG_PROTECT_SET,
				CONFIG_SYS_FLASH_BASE,
				CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
				&flash_info[0]);
#endif

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect (FLAG_PROTECT_SET,
			CONFIG_ENV_ADDR,
			CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
			&flash_info[0]);
#endif

	flash_info[0].size = size_b0;

	return (size_b0);
}

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

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

	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
		for (i = 0; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000);
		}
	}
}

/*-----------------------------------------------------------------------
 */
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_INTEL:
		printf ("INTEL ");
		break;
	default:
		printf ("Unknown Vendor ");
		break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F320J3A:
		printf ("28F320J3A\n");
		break;
	case FLASH_28F640J3A:
		printf ("28F640J3A\n");
		break;
	case FLASH_28F128J3A:
		printf ("28F128J3A\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!
 */

static ulong flash_get_size (FPW * addr, flash_info_t * info)
{
	FPW value;

	/* Make sure Block Lock Bits get cleared */
	addr[0] = (FPW) 0x00FF00FF;
	addr[0] = (FPW) 0x00600060;
	addr[0] = (FPW) 0x00D000D0;
	addr[0] = (FPW) 0x00FF00FF;

	/* Write auto select command: read Manufacturer ID */
	addr[0x5555] = (FPW) 0x00AA00AA;
	addr[0x2AAA] = (FPW) 0x00550055;
	addr[0x5555] = (FPW) 0x00900090;

	value = addr[0];

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

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

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

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

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

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

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

	default:
		info->flash_id = FLASH_UNKNOWN;
		break;
	}

	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] = (FPW) 0x00FF00FF;	/* restore read mode */

	return (info->size);
}


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

int flash_erase (flash_info_t * info, int s_first, int s_last)
{
	int flag, prot, sect;
	ulong type, 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;
	}

	type = (info->flash_id & FLASH_VENDMASK);
	if ((type != FLASH_MAN_INTEL)) {
		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");
	}

	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 */
			FPWV *addr = (FPWV *) (info->start[sect]);
			FPW status;

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

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

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

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

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

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

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

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

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

	int i, l, rc, port_width;

	if (info->flash_id == FLASH_UNKNOWN) {
		return 4;
	}
/* get lower word aligned address */
#ifdef FLASH_PORT_WIDTH16
	wp = (addr & ~1);
	port_width = 2;
#else
	wp = (addr & ~3);
	port_width = 4;
#endif

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		data = 0;
		for (i = 0, cp = wp; i < l; ++i, ++cp) {
			data = (data << 8) | (*(uchar *) cp);
		}
		for (; i < port_width && cnt > 0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt == 0 && i < port_width; ++i, ++cp) {
			data = (data << 8) | (*(uchar *) cp);
		}

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

	/*
	 * handle word aligned part
	 */
	while (cnt >= port_width) {
		data = 0;
		for (i = 0; i < port_width; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_data (info, wp, data)) != 0) {
			return (rc);
		}
		wp += port_width;
		cnt -= port_width;
	}

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

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

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

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

	/* Check if Flash is (sufficiently) erased */
	if ((*addr & data) != data) {
		printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

	*addr = (FPW) 0x00400040;	/* write setup */
	*addr = data;

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

	start = get_timer (0);

	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
		if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			*addr = (FPW) 0x00FF00FF;	/* restore read mode */
			return (1);
		}
	}

	*addr = (FPW) 0x00FF00FF;	/* restore read mode */

	return (0);
}
Commit	Line	Data
89930721 WD	1	/*
	2	* (C) Copyright 2001
	3	* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
	4	*
	5	* (C) Copyright 2001
	6	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	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
43d9616c WD	27	/* #define DEBUG */
43d9616c WD	28
89930721 WD	29	#include <common.h>
	30	#include <mpc8xx.h>
	31
6d0f6bcf	32	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
89930721	33
5a1aceb0	34	#if defined(CONFIG_ENV_IS_IN_FLASH)
0e8d1586	35	# ifndef CONFIG_ENV_ADDR
6d0f6bcf	36	# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
89930721	37	# endif
0e8d1586 JCPV	38	# ifndef CONFIG_ENV_SIZE
0e8d1586 JCPV	39	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
89930721	40	# endif
0e8d1586 JCPV	41	# ifndef CONFIG_ENV_SECT_SIZE
0e8d1586 JCPV	42	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
89930721 WD	43	# endif
	44	#endif
	45
	46	/*-----------------------------------------------------------------------
	47	* Protection Flags:
	48	*/
	49	#define FLAG_PROTECT_SET 0x01
	50	#define FLAG_PROTECT_CLEAR 0x02
	51
	52	/* Board support for 1 or 2 flash devices */
	53	#undef FLASH_PORT_WIDTH32
	54	#define FLASH_PORT_WIDTH16
	55
	56	#ifdef FLASH_PORT_WIDTH16
43d9616c WD	57	#define FLASH_PORT_WIDTH ushort
43d9616c WD	58	#define FLASH_PORT_WIDTHV vu_short
89930721	59	#else
43d9616c WD	60	#define FLASH_PORT_WIDTH ulong
43d9616c WD	61	#define FLASH_PORT_WIDTHV vu_long
89930721 WD	62	#endif
89930721 WD	63
43d9616c WD	64	#define FPW FLASH_PORT_WIDTH
43d9616c WD	65	#define FPWV FLASH_PORT_WIDTHV
89930721 WD	66
	67	/*-----------------------------------------------------------------------
	68	* Functions
	69	*/
43d9616c WD	70	static ulong flash_get_size (FPW * addr, flash_info_t * info);
	71	static int write_data (flash_info_t * info, ulong dest, FPW data);
	72	static void flash_get_offsets (ulong base, flash_info_t * info);
89930721 WD	73
	74	/*-----------------------------------------------------------------------
	75	*/
	76
	77	unsigned long flash_init (void)
	78	{
6d0f6bcf	79	volatile immap_t immap = (immap_t ) CONFIG_SYS_IMMR;
89930721 WD	80	volatile memctl8xx_t *memctl = &immap->im_memctl;
	81	unsigned long size_b0;
	82	int i;
	83
	84	/* Init: no FLASHes known */
6d0f6bcf	85	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
89930721 WD	86	flash_info[i].flash_id = FLASH_UNKNOWN;
	87	}
	88
	89	/* Static FLASH Bank configuration here - FIXME XXX */
43d9616c	90	size_b0 = flash_get_size ((FPW *) FLASH_BASE0_PRELIM, &flash_info[0]);
89930721 WD	91
	92	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	93	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
43d9616c	94	size_b0, size_b0 << 20);
89930721 WD	95	}
	96
	97	/* Remap FLASH according to real size */
6d0f6bcf JCPV	98	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH \| (-size_b0 & 0xFFFF8000);
6d0f6bcf JCPV	99	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) \| BR_PS_16 \| BR_MS_GPCM \| BR_V;
89930721 WD	100
89930721 WD	101	/* Re-do sizing to get full correct info */
6d0f6bcf	102	size_b0 = flash_get_size ((FPW *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
89930721	103
6d0f6bcf	104	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
89930721	105
6d0f6bcf	106	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
89930721	107	/* monitor protection ON by default */
43d9616c	108	(void) flash_protect (FLAG_PROTECT_SET,
6d0f6bcf JCPV	109	CONFIG_SYS_FLASH_BASE,
6d0f6bcf JCPV	110	CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
43d9616c	111	&flash_info[0]);
89930721 WD	112	#endif
89930721 WD	113
5a1aceb0	114	#ifdef CONFIG_ENV_IS_IN_FLASH
89930721	115	/* ENV protection ON by default */
43d9616c	116	flash_protect (FLAG_PROTECT_SET,
0e8d1586 JCPV	117	CONFIG_ENV_ADDR,
0e8d1586 JCPV	118	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
43d9616c	119	&flash_info[0]);
89930721 WD	120	#endif
	121
	122	flash_info[0].size = size_b0;
	123
	124	return (size_b0);
	125	}
	126
	127	/*-----------------------------------------------------------------------
	128	*/
43d9616c	129	static void flash_get_offsets (ulong base, flash_info_t * info)
89930721 WD	130	{
	131	int i;
	132
	133	if (info->flash_id == FLASH_UNKNOWN) {
	134	return;
	135	}
	136
	137	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
	138	for (i = 0; i < info->sector_count; i++) {
	139	info->start[i] = base + (i * 0x00020000);
	140	}
	141	}
	142	}
	143
	144	/*-----------------------------------------------------------------------
	145	*/
43d9616c	146	void flash_print_info (flash_info_t * info)
89930721 WD	147	{
	148	int i;
	149
	150	if (info->flash_id == FLASH_UNKNOWN) {
	151	printf ("missing or unknown FLASH type\n");
	152	return;
	153	}
	154
	155	switch (info->flash_id & FLASH_VENDMASK) {
43d9616c WD	156	case FLASH_MAN_INTEL:
	157	printf ("INTEL ");
	158	break;
	159	default:
	160	printf ("Unknown Vendor ");
	161	break;
89930721 WD	162	}
	163
	164	switch (info->flash_id & FLASH_TYPEMASK) {
43d9616c WD	165	case FLASH_28F320J3A:
	166	printf ("28F320J3A\n");
	167	break;
	168	case FLASH_28F640J3A:
	169	printf ("28F640J3A\n");
	170	break;
	171	case FLASH_28F128J3A:
	172	printf ("28F128J3A\n");
	173	break;
	174	default:
	175	printf ("Unknown Chip Type\n");
	176	break;
89930721 WD	177	}
	178
	179	printf (" Size: %ld MB in %d Sectors\n",
43d9616c	180	info->size >> 20, info->sector_count);
89930721 WD	181
89930721 WD	182	printf (" Sector Start Addresses:");
43d9616c	183	for (i = 0; i < info->sector_count; ++i) {
89930721 WD	184	if ((i % 5) == 0)
	185	printf ("\n ");
	186	printf (" %08lX%s",
	187	info->start[i],
43d9616c	188	info->protect[i] ? " (RO)" : " ");
89930721 WD	189	}
	190	printf ("\n");
	191	return;
	192	}
	193
	194	/*-----------------------------------------------------------------------
	195	*/
	196
	197
	198	/*-----------------------------------------------------------------------
	199	*/
	200
	201	/*
	202	* The following code cannot be run from FLASH!
	203	*/
	204
43d9616c	205	static ulong flash_get_size (FPW * addr, flash_info_t * info)
89930721 WD	206	{
	207	FPW value;
	208
d791b1dc WD	209	/* Make sure Block Lock Bits get cleared */
	210	addr[0] = (FPW) 0x00FF00FF;
	211	addr[0] = (FPW) 0x00600060;
	212	addr[0] = (FPW) 0x00D000D0;
	213	addr[0] = (FPW) 0x00FF00FF;
	214
89930721	215	/* Write auto select command: read Manufacturer ID */
43d9616c WD	216	addr[0x5555] = (FPW) 0x00AA00AA;
	217	addr[0x2AAA] = (FPW) 0x00550055;
	218	addr[0x5555] = (FPW) 0x00900090;
89930721 WD	219
	220	value = addr[0];
	221
43d9616c WD	222	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
	223
	224	switch (value) {
	225	case (FPW) INTEL_MANUFACT:
	226	info->flash_id = FLASH_MAN_INTEL;
	227	break;
89930721 WD	228	default:
	229	info->flash_id = FLASH_UNKNOWN;
	230	info->sector_count = 0;
	231	info->size = 0;
43d9616c WD	232	addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
43d9616c WD	233	return (0); /* no or unknown flash */
89930721 WD	234	}
89930721 WD	235
43d9616c WD	236	value = addr[1]; /* device ID */
	237
	238	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
89930721	239
43d9616c WD	240	switch (value) {
	241	case (FPW) INTEL_ID_28F320J3A:
	242	info->flash_id += FLASH_28F320J3A;
	243	info->sector_count = 32;
	244	info->size = 0x00400000;
	245	break; /* => 4 MB */
89930721	246
43d9616c WD	247	case (FPW) INTEL_ID_28F640J3A:
	248	info->flash_id += FLASH_28F640J3A;
	249	info->sector_count = 64;
	250	info->size = 0x00800000;
	251	break; /* => 8 MB */
89930721	252
43d9616c WD	253	case (FPW) INTEL_ID_28F128J3A:
	254	info->flash_id += FLASH_28F128J3A;
	255	info->sector_count = 128;
	256	info->size = 0x01000000;
	257	break; /* => 16 MB */
89930721 WD	258
	259	default:
	260	info->flash_id = FLASH_UNKNOWN;
	261	break;
	262	}
	263
6d0f6bcf	264	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
89930721	265	printf (" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	266	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	267	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
89930721 WD	268	}
89930721 WD	269
43d9616c	270	addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
89930721 WD	271
	272	return (info->size);
	273	}
	274
	275
	276	/*-----------------------------------------------------------------------
	277	*/
	278
43d9616c	279	int flash_erase (flash_info_t * info, int s_first, int s_last)
89930721 WD	280	{
	281	int flag, prot, sect;
	282	ulong type, start, now, last;
	283	int rcode = 0;
	284
	285	if ((s_first < 0) \|\| (s_first > s_last)) {
	286	if (info->flash_id == FLASH_UNKNOWN) {
	287	printf ("- missing\n");
	288	} else {
	289	printf ("- no sectors to erase\n");
	290	}
	291	return 1;
	292	}
	293
	294	type = (info->flash_id & FLASH_VENDMASK);
	295	if ((type != FLASH_MAN_INTEL)) {
	296	printf ("Can't erase unknown flash type %08lx - aborted\n",
	297	info->flash_id);
	298	return 1;
	299	}
	300
	301	prot = 0;
43d9616c	302	for (sect = s_first; sect <= s_last; ++sect) {
89930721 WD	303	if (info->protect[sect]) {
	304	prot++;
	305	}
	306	}
	307
	308	if (prot) {
	309	printf ("- Warning: %d protected sectors will not be erased!\n",
	310	prot);
	311	} else {
	312	printf ("\n");
	313	}
	314
	315	start = get_timer (0);
43d9616c	316	last = start;
89930721	317	/* Start erase on unprotected sectors */
43d9616c	318	for (sect = s_first; sect <= s_last; sect++) {
89930721	319	if (info->protect[sect] == 0) { /* not protected */
43d9616c	320	FPWV addr = (FPWV ) (info->start[sect]);
89930721 WD	321	FPW status;
	322
	323	/* Disable interrupts which might cause a timeout here */
43d9616c	324	flag = disable_interrupts ();
89930721	325
43d9616c WD	326	addr = (FPW) 0x00500050; / clear status register */
	327	addr = (FPW) 0x00200020; / erase setup */
	328	addr = (FPW) 0x00D000D0; / erase confirm */
89930721 WD	329
	330	/* re-enable interrupts if necessary */
	331	if (flag)
43d9616c	332	enable_interrupts ();
89930721 WD	333
	334	/* wait at least 80us - let's wait 1 ms */
	335	udelay (1000);
	336
43d9616c	337	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
6d0f6bcf	338	if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
43d9616c WD	339	printf ("Timeout\n");
	340	addr = (FPW) 0x00B000B0; / suspend erase */
	341	addr = (FPW) 0x00FF00FF; / reset to read mode */
	342	rcode = 1;
	343	break;
	344	}
	345
	346	/* show that we're waiting */
	347	if ((now - last) > 1000) { /* every second */
	348	putc ('.');
	349	last = now;
	350	}
89930721 WD	351	}
89930721 WD	352
43d9616c	353	addr = (FPW) 0x00FF00FF; / reset to read mode */
89930721 WD	354	}
	355	}
	356	printf (" done\n");
	357	return rcode;
	358	}
	359
	360	/*-----------------------------------------------------------------------
	361	* Copy memory to flash, returns:
	362	* 0 - OK
	363	* 1 - write timeout
	364	* 2 - Flash not erased
	365	* 4 - Flash not identified
	366	*/
	367
43d9616c	368	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
89930721 WD	369	{
	370	ulong cp, wp;
	371	FPW data;
43d9616c	372
89930721	373	int i, l, rc, port_width;
89930721 WD	374
	375	if (info->flash_id == FLASH_UNKNOWN) {
	376	return 4;
	377	}
	378	/* get lower word aligned address */
	379	#ifdef FLASH_PORT_WIDTH16
	380	wp = (addr & ~1);
	381	port_width = 2;
	382	#else
	383	wp = (addr & ~3);
	384	port_width = 4;
	385	#endif
	386
	387	/*
	388	* handle unaligned start bytes
	389	*/
	390	if ((l = addr - wp) != 0) {
	391	data = 0;
43d9616c WD	392	for (i = 0, cp = wp; i < l; ++i, ++cp) {
43d9616c WD	393	data = (data << 8) \| ((uchar ) cp);
89930721	394	}
43d9616c	395	for (; i < port_width && cnt > 0; ++i) {
89930721 WD	396	data = (data << 8) \| *src++;
	397	--cnt;
	398	++cp;
	399	}
43d9616c WD	400	for (; cnt == 0 && i < port_width; ++i, ++cp) {
43d9616c WD	401	data = (data << 8) \| ((uchar ) cp);
89930721 WD	402	}
89930721 WD	403
43d9616c	404	if ((rc = write_data (info, wp, data)) != 0) {
89930721 WD	405	return (rc);
	406	}
	407	wp += port_width;
	408	}
	409
	410	/*
	411	* handle word aligned part
	412	*/
89930721 WD	413	while (cnt >= port_width) {
89930721 WD	414	data = 0;
43d9616c	415	for (i = 0; i < port_width; ++i) {
89930721 WD	416	data = (data << 8) \| *src++;
89930721 WD	417	}
43d9616c	418	if ((rc = write_data (info, wp, data)) != 0) {
89930721 WD	419	return (rc);
89930721 WD	420	}
43d9616c	421	wp += port_width;
89930721	422	cnt -= port_width;
89930721 WD	423	}
	424
	425	if (cnt == 0) {
	426	return (0);
	427	}
	428
	429	/*
	430	* handle unaligned tail bytes
	431	*/
	432	data = 0;
43d9616c	433	for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
89930721 WD	434	data = (data << 8) \| *src++;
	435	--cnt;
	436	}
43d9616c WD	437	for (; i < port_width; ++i, ++cp) {
43d9616c WD	438	data = (data << 8) \| ((uchar ) cp);
89930721 WD	439	}
89930721 WD	440
43d9616c	441	return (write_data (info, wp, data));
89930721 WD	442	}
	443
	444	/*-----------------------------------------------------------------------
	445	* Write a word or halfword to Flash, returns:
	446	* 0 - OK
	447	* 1 - write timeout
	448	* 2 - Flash not erased
	449	*/
43d9616c	450	static int write_data (flash_info_t * info, ulong dest, FPW data)
89930721	451	{
43d9616c	452	FPWV addr = (FPWV ) dest;
89930721 WD	453	ulong status;
	454	ulong start;
	455	int flag;
	456
	457	/* Check if Flash is (sufficiently) erased */
	458	if ((*addr & data) != data) {
43d9616c	459	printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
89930721 WD	460	return (2);
	461	}
	462	/* Disable interrupts which might cause a timeout here */
43d9616c	463	flag = disable_interrupts ();
89930721	464
43d9616c	465	addr = (FPW) 0x00400040; / write setup */
89930721 WD	466	*addr = data;
	467
	468	/* re-enable interrupts if necessary */
	469	if (flag)
43d9616c	470	enable_interrupts ();
89930721 WD	471
	472	start = get_timer (0);
	473
43d9616c	474	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
6d0f6bcf	475	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
43d9616c	476	addr = (FPW) 0x00FF00FF; / restore read mode */
89930721 WD	477	return (1);
	478	}
	479	}
	480
43d9616c	481	addr = (FPW) 0x00FF00FF; / restore read mode */
89930721 WD	482
	483	return (0);
	484	}