[u-boot.git] / board / cmi / flash.c

/*
 * (C) Copyright 2003
 * Martin Winistoerfer, [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
 */

/*
 * File:		flash.c
 *
 * Discription:		This Driver is for 28F320J3A, 28F640J3A and
 *			28F128J3A Intel flashs working in 16 Bit mode.
 *			They are single bank flashs.
 *
 *			Most of this code is taken from existing u-boot
 *			source code.
 */


#include <common.h>
#include <mpc5xx.h>

#if defined(CFG_ENV_IS_IN_FLASH)
# ifndef  CFG_ENV_ADDR
#  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef  CFG_ENV_SIZE
#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
# endif
# ifndef  CFG_ENV_SECT_SIZE
#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
# endif
#endif

#define	FLASH_ID_MASK			0xFFFF
#define FLASH_BLOCK_SIZE		0x00010000
#define FLASH_CMD_READ_ID		0x0090
#define FLASH_CMD_RESET			0x00ff
#define FLASH_CMD_BLOCK_ERASE		0x0020
#define FLASH_CMD_ERASE_CONFIRM		0x00D0
#define FLASH_CMD_CLEAR_STATUS		0x0050
#define FLASH_CMD_SUSPEND_ERASE		0x00B0
#define FLASH_CMD_WRITE			0x0040
#define FLASH_CMD_PROTECT		0x0060
#define FLASH_CMD_PROTECT_SET		0x0001
#define FLASH_CMD_PROTECT_CLEAR		0x00D0
#define FLASH_STATUS_DONE		0x0080

flash_info_t	flash_info[CFG_MAX_FLASH_BANKS];

/*
 * Local function prototypes
 */
static ulong	flash_get_size		(vu_short *addr, flash_info_t *info);
static int	write_short		(flash_info_t *info, ulong dest, ushort data);
static void	flash_get_offsets	(ulong base, flash_info_t *info);

/*
 * Initialize flash
 */

unsigned long flash_init (void)
{
	unsigned long size_b0;
	int i;

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

	/* Static FLASH Bank configuration here - FIXME XXX */
#if 1
	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
#endif
	size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]);

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

	flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);

	flash_info[0].size = size_b0;

#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_info[0]);
#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_SECT_SIZE-1,
		      &flash_info[0]);
#endif

	return size_b0;
}

/*
 * Compute start adress of each sector (block)
 */

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 + i * FLASH_BLOCK_SIZE;
	    }
	    return;

	default:
	    printf ("Don't know sector offsets for flash type 0x%lx\n",
		info->flash_id);
	    return;
	}
}

/*
 * Print flash information
 */
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) 16-Bit\n");
				break;
	case FLASH_28F640J3A:	printf ("28F640J3A (64Mbit) 16-Bit\n");
				break;
	case FLASH_28F128J3A:	printf ("28F128J3A (128Mbit) 16-Bit\n");
				break;
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	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");
	return;
}

/*
 * Get size of flash in bytes.
 * The following code cannot be run from FLASH!
 */

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

	/* Read Manufacturer ID */
	addr[0] = FLASH_CMD_READ_ID;
	value = addr[0];

	switch (value) {
	case (AMD_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FUJ_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (SST_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_SST;
		break;
	case (STM_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_STM;
		break;
	case (INTEL_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_INTEL;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = FLASH_CMD_RESET;	/* restore read mode */
		return (0);			/* no or unknown flash	*/
	}

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

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

	case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
		info->flash_id += FLASH_28F640J3A;
		info->sector_count = 64;
		info->size = 0x00800000;
		break;				/* => 64 MBit		*/

	case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
		info->flash_id += FLASH_28F128J3A;
		info->sector_count = 128;
		info->size = 0x01000000;
		break;				/* => 128 MBit		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		addr[0] = FLASH_CMD_RESET;	/* restore read mode */
		return (0);			/* => no or unknown flash */

	}

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

	addr[0] = FLASH_CMD_RESET;		/* restore read mode */

	return (info->size);
}


/*
 * Erase unprotected sectors
 */

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

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

#ifdef DEBUG
			printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]);
#endif

			*addr = FLASH_CMD_CLEAR_STATUS;
			*addr = FLASH_CMD_BLOCK_ERASE;
			*addr = FLASH_CMD_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) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) {
				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf("Flash erase timeout at address %lx\n", info->start[sect]);
					*addr = FLASH_CMD_SUSPEND_ERASE;
					*addr = FLASH_CMD_RESET;
					return 1;
				}

				/* show that we're waiting */
				if ((now - last) > 1000) {	/* every second */
					putc ('.');
					last = now;
				}
			}
			*addr = FLASH_CMD_RESET;
		}
	}
	printf (" done\n");
	return 0;
}

/*
 * 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;
	ushort data;
	int i, rc;

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

	wp = (addr & ~1);	/* get lower word aligned address */

	/*
	 * handle unaligned start byte
	 */

	if (addr - wp) {
		data = 0;
		data = (data << 8) | *src++;
		--cnt;
		if ((rc = write_short(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 2;
	}

	/*
	 * handle word aligned part
	 */

	while (cnt >= 2) {
		data = 0;
		for (i=0; i<2; ++i) {
			data = (data << 8) | *src++;
		}

		if ((rc = write_short(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 2;
		cnt -= 2;
	}

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

	/*
	 * handle unaligned tail bytes
	 */

	data = 0;
	for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i<2; ++i, ++cp) {
		data = (data << 8) | (*(uchar *)cp);
	}

	return (write_short(info, wp, data));

}

/*
 * Write 16 bit (short) to flash
 */

static int write_short (flash_info_t *info, ulong dest, ushort data)
{
	vu_short *addr = (vu_short*)(info->start[0]);
	ulong start;
	int flag;

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

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

	if (!(info->flash_id & FLASH_VENDMASK)) {
		return 4;
	}
	*addr = FLASH_CMD_ERASE_CONFIRM;
	*addr = FLASH_CMD_WRITE;

	*((vu_short *)dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);

	/* wait for error or finish */
	while(!(addr[0] & FLASH_STATUS_DONE)){
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			addr[0] = FLASH_CMD_RESET;
			return (1);
		}
	}

	*addr = FLASH_CMD_RESET;
	return (0);
}

/*
 * Protects a flash sector
 */

int flash_real_protect(flash_info_t *info, long sector, int prot)
{
	vu_short *addr = (vu_short*)(info->start[sector]);
	ulong start;

	*addr = FLASH_CMD_CLEAR_STATUS;
	*addr = FLASH_CMD_PROTECT;

	if(prot) {
		*addr = FLASH_CMD_PROTECT_SET;
	} else {
		*addr = FLASH_CMD_PROTECT_CLEAR;
	}

	/* wait for error or finish */
	start = get_timer (0);
	while(!(addr[0] & FLASH_STATUS_DONE)){
		if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
			printf("Flash protect timeout at address %lx\n",  info->start[sector]);
			addr[0] = FLASH_CMD_RESET;
			return (1);
		}
	}
	/* Set software protect flag */
	info->protect[sector] = prot;
	*addr = FLASH_CMD_RESET;
	return (0);
}
Commit	Line	Data
0db5bca8 WD	1	/*
	2	* (C) Copyright 2003
	3	* Martin Winistoerfer, [email protected].
	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	* File: flash.c
	26	*
	27	* Discription: This Driver is for 28F320J3A, 28F640J3A and
53677ef1	28	* 28F128J3A Intel flashs working in 16 Bit mode.
0db5bca8 WD	29	* They are single bank flashs.
	30	*
	31	* Most of this code is taken from existing u-boot
	32	* source code.
	33	*/
	34
	35
	36	#include <common.h>
	37	#include <mpc5xx.h>
	38
	39	#if defined(CFG_ENV_IS_IN_FLASH)
	40	# ifndef CFG_ENV_ADDR
	41	# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	42	# endif
	43	# ifndef CFG_ENV_SIZE
	44	# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
	45	# endif
	46	# ifndef CFG_ENV_SECT_SIZE
	47	# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
	48	# endif
	49	#endif
	50
	51	#define FLASH_ID_MASK 0xFFFF
	52	#define FLASH_BLOCK_SIZE 0x00010000
	53	#define FLASH_CMD_READ_ID 0x0090
	54	#define FLASH_CMD_RESET 0x00ff
	55	#define FLASH_CMD_BLOCK_ERASE 0x0020
	56	#define FLASH_CMD_ERASE_CONFIRM 0x00D0
	57	#define FLASH_CMD_CLEAR_STATUS 0x0050
	58	#define FLASH_CMD_SUSPEND_ERASE 0x00B0
	59	#define FLASH_CMD_WRITE 0x0040
	60	#define FLASH_CMD_PROTECT 0x0060
	61	#define FLASH_CMD_PROTECT_SET 0x0001
	62	#define FLASH_CMD_PROTECT_CLEAR 0x00D0
	63	#define FLASH_STATUS_DONE 0x0080
	64
	65	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	66
	67	/*
	68	* Local function prototypes
	69	*/
53677ef1 WD	70	static ulong flash_get_size (vu_short addr, flash_info_t info);
	71	static int write_short (flash_info_t *info, ulong dest, ushort data);
	72	static void flash_get_offsets (ulong base, flash_info_t *info);
0db5bca8 WD	73
	74	/*
	75	* Initialize flash
	76	*/
	77
	78	unsigned long flash_init (void)
	79	{
	80	unsigned long size_b0;
	81	int i;
	82
	83	/* Init: no FLASHes known */
	84	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	85	flash_info[i].flash_id = FLASH_UNKNOWN;
	86	}
	87
	88	/* Static FLASH Bank configuration here - FIXME XXX */
	89	#if 1
	90	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
	91	#endif
	92	size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]);
	93
	94	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	95	printf ("## Unknown FLASH on Bank 0: "
	96	"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
	97	flash_info[0].flash_id,
	98	size_b0, size_b0<<20);
	99	}
	100
	101	flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
	102
	103	flash_info[0].size = size_b0;
	104
	105	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	106	/* monitor protection ON by default */
	107	flash_protect(FLAG_PROTECT_SET,
	108	CFG_MONITOR_BASE,
3b57fe0a	109	CFG_MONITOR_BASE+monitor_flash_len-1,
0db5bca8 WD	110	&flash_info[0]);
	111	#endif
	112
	113	#ifdef CFG_ENV_IS_IN_FLASH
	114	/* ENV protection ON by default */
	115	flash_protect(FLAG_PROTECT_SET,
	116	CFG_ENV_ADDR,
	117	CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
	118	&flash_info[0]);
	119	#endif
	120
	121	return size_b0;
	122	}
	123
	124	/*
	125	* Compute start adress of each sector (block)
	126	*/
	127
	128	static void flash_get_offsets (ulong base, flash_info_t *info)
	129	{
	130	int i;
	131
	132	if (info->flash_id == FLASH_UNKNOWN) {
	133	return;
	134	}
	135
	136	switch (info->flash_id & FLASH_VENDMASK) {
	137	case FLASH_MAN_INTEL:
	138	for (i = 0; i < info->sector_count; i++) {
	139	info->start[i] = base + i * FLASH_BLOCK_SIZE;
	140	}
	141	return;
	142
	143	default:
	144	printf ("Don't know sector offsets for flash type 0x%lx\n",
	145	info->flash_id);
	146	return;
	147	}
	148	}
	149
	150	/*
	151	* Print flash information
	152	*/
	153	void flash_print_info (flash_info_t *info)
	154	{
	155	int i;
	156
	157	if (info->flash_id == FLASH_UNKNOWN) {
	158	printf ("missing or unknown FLASH type\n");
	159	return;
	160	}
	161
	162	switch (info->flash_id & FLASH_VENDMASK) {
	163	case FLASH_MAN_AMD: printf ("AMD "); break;
	164	case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
	165	case FLASH_MAN_SST: printf ("SST "); break;
	166	case FLASH_MAN_STM: printf ("STM "); break;
	167	case FLASH_MAN_INTEL: printf ("Intel "); break;
	168	case FLASH_MAN_MT: printf ("MT "); break;
	169	default: printf ("Unknown Vendor "); break;
	170	}
	171
	172	switch (info->flash_id & FLASH_TYPEMASK) {
	173	case FLASH_28F320J3A: printf ("28F320J3A (32Mbit) 16-Bit\n");
174	break;
175	case FLASH_28F640J3A: printf ("28F640J3A (64Mbit) 16-Bit\n");
176	break;
177	case FLASH_28F128J3A: printf ("28F128J3A (128Mbit) 16-Bit\n");
178	break;
179	default: printf ("Unknown Chip Type\n");
180	break;
181	}
182
183	if (info->size >= (1 << 20)) {
184	i = 20;
185	} else {
186	i = 10;
187	}
188	printf (" Size: %ld %cB in %d Sectors\n",
189	info->size >> i,
190	(i == 20) ? 'M' : 'k',
191	info->sector_count);
192
193	printf (" Sector Start Addresses:");
194	for (i=0; i<info->sector_count; ++i) {
195	if ((i % 5) == 0)
196	printf ("\n ");
197	printf (" %08lX%s",
198	info->start[i],
199	info->protect[i] ? " (RO)" : " "
200	);
201	}
202	printf ("\n");
203	return;
204	}
205
206	/*
207	* Get size of flash in bytes.
208	* The following code cannot be run from FLASH!
209	*/
210
211	static ulong flash_get_size (vu_short addr, flash_info_t info)
212	{
213	vu_short value;
214
215	/* Read Manufacturer ID */
216	addr[0] = FLASH_CMD_READ_ID;
217	value = addr[0];
218
219	switch (value) {
220	case (AMD_MANUFACT & FLASH_ID_MASK):
221	info->flash_id = FLASH_MAN_AMD;
222	break;
223	case (FUJ_MANUFACT & FLASH_ID_MASK):
224	info->flash_id = FLASH_MAN_FUJ;
225	break;
226	case (SST_MANUFACT & FLASH_ID_MASK):
227	info->flash_id = FLASH_MAN_SST;
228	break;
229	case (STM_MANUFACT & FLASH_ID_MASK):
230	info->flash_id = FLASH_MAN_STM;
231	break;
232	case (INTEL_MANUFACT & FLASH_ID_MASK):
233	info->flash_id = FLASH_MAN_INTEL;
234	break;
235	default:
236	info->flash_id = FLASH_UNKNOWN;
237	info->sector_count = 0;
238	info->size = 0;
239	addr[0] = FLASH_CMD_RESET; /* restore read mode */
240	return (0); /* no or unknown flash */
241	}
242
243	value = addr[1]; /* device ID */
244
245	switch (value) {
246	case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
247	info->flash_id += FLASH_28F320J3A;
248	info->sector_count = 32;
249	info->size = 0x00400000;
250	break; /* => 32 MBit */
251
252	case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
253	info->flash_id += FLASH_28F640J3A;
254	info->sector_count = 64;
255	info->size = 0x00800000;
256	break; /* => 64 MBit */
257
258	case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
259	info->flash_id += FLASH_28F128J3A;
260	info->sector_count = 128;
261	info->size = 0x01000000;
262	break; /* => 128 MBit */
263
264	default:
265	info->flash_id = FLASH_UNKNOWN;
266	addr[0] = FLASH_CMD_RESET; /* restore read mode */
267	return (0); /* => no or unknown flash */
268
269	}
270
271	if (info->sector_count > CFG_MAX_FLASH_SECT) {
272	printf (" ERROR: sector count %d > max (%d) \n",
273	info->sector_count, CFG_MAX_FLASH_SECT);
274	info->sector_count = CFG_MAX_FLASH_SECT;
275	}
276
277	addr[0] = FLASH_CMD_RESET; /* restore read mode */
278
279	return (info->size);
280	}
281
282
283	/*
284	* Erase unprotected sectors
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",
315	prot);
316	} else {
317	printf ("\n");
318	}
319
320	start = get_timer (0);
321	last = start;
322
323	/* Start erase on unprotected sectors */
324	for (sect = s_first; sect<=s_last; sect++) {
325	if (info->protect[sect] == 0) { /* not protected */
326	vu_short addr = (vu_short )(info->start[sect]);
327	unsigned long status;
328
329	/* Disable interrupts which might cause a timeout here */
330	flag = disable_interrupts();
331
332	#ifdef DEBUG
333	printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]);
334	#endif
335
336	*addr = FLASH_CMD_CLEAR_STATUS;
337	*addr = FLASH_CMD_BLOCK_ERASE;
338	*addr = FLASH_CMD_ERASE_CONFIRM;
339
340	/* re-enable interrupts if necessary */
341	if (flag)
342	enable_interrupts();
343
344	/* wait at least 80us - let's wait 1 ms */
345	udelay (1000);
346
347	while (((status = *addr) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) {
348	if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
349	printf("Flash erase timeout at address %lx\n", info->start[sect]);
350	*addr = FLASH_CMD_SUSPEND_ERASE;
351	*addr = FLASH_CMD_RESET;
352	return 1;
353	}
354
355	/* show that we're waiting */
356	if ((now - last) > 1000) { /* every second */
357	putc ('.');
358	last = now;
359	}
360	}
361	*addr = FLASH_CMD_RESET;
362	}
363	}
364	printf (" done\n");
365	return 0;
366	}
367
368	/*
369	* Copy memory to flash, returns:
370	* 0 - OK
371	* 1 - write timeout
372	* 2 - Flash not erased
373	* 4 - Flash not identified
374	*/
375
376	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
377	{
378	ulong cp, wp;
379	ushort data;
380	int i, rc;
381
382	if (info->flash_id == FLASH_UNKNOWN) {
383	return 4;
384	}
385
386	wp = (addr & ~1); /* get lower word aligned address */
387
388	/*
389	* handle unaligned start byte
390	*/
391
392	if (addr - wp) {
393	data = 0;
394	data = (data << 8) \| *src++;
395	--cnt;
396	if ((rc = write_short(info, wp, data)) != 0) {
397	return (rc);
398	}
399	wp += 2;
400	}
401
402	/*
403	* handle word aligned part
404	*/
405
406	while (cnt >= 2) {
407	data = 0;
408	for (i=0; i<2; ++i) {
409	data = (data << 8) \| *src++;
410	}
411
412	if ((rc = write_short(info, wp, data)) != 0) {
413	return (rc);
414	}
415	wp += 2;
416	cnt -= 2;
417	}
418
419	if (cnt == 0) {
420	return (0);
421	}
422
423	/*
424	* handle unaligned tail bytes
425	*/
426
427	data = 0;
428	for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
429	data = (data << 8) \| *src++;
430	--cnt;
431	}
432	for (; i<2; ++i, ++cp) {
433	data = (data << 8) \| ((uchar )cp);
434	}
435
436	return (write_short(info, wp, data));
437
438	}
439
440	/*
441	* Write 16 bit (short) to flash
442	*/
443
444	static int write_short (flash_info_t *info, ulong dest, ushort data)
445	{
446	vu_short addr = (vu_short)(info->start[0]);
447	ulong start;
448	int flag;
449
450	/* Check if Flash is (sufficiently) erased */
451	if ((((vu_short )dest) & data) != data) {
452	return (2);
453	}
454
455	/* Disable interrupts which might cause a timeout here */
456	flag = disable_interrupts();
457
458	if (!(info->flash_id & FLASH_VENDMASK)) {
459	return 4;
460	}
8bde7f77	461	*addr = FLASH_CMD_ERASE_CONFIRM;
0db5bca8 WD	462	*addr = FLASH_CMD_WRITE;
	463
	464	((vu_short )dest) = data;
	465
	466	/* re-enable interrupts if necessary */
	467	if (flag) {
	468	enable_interrupts();
	469	}
	470
	471	/* data polling for D7 */
	472	start = get_timer (0);
	473
	474	/* wait for error or finish */
	475	while(!(addr[0] & FLASH_STATUS_DONE)){
	476	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
8bde7f77	477	addr[0] = FLASH_CMD_RESET;
0db5bca8 WD	478	return (1);
	479	}
	480	}
	481
	482	*addr = FLASH_CMD_RESET;
	483	return (0);
	484	}
	485
	486	/*
	487	* Protects a flash sector
	488	*/
	489
	490	int flash_real_protect(flash_info_t *info, long sector, int prot)
	491	{
	492	vu_short addr = (vu_short)(info->start[sector]);
	493	ulong start;
	494
	495	*addr = FLASH_CMD_CLEAR_STATUS;
	496	*addr = FLASH_CMD_PROTECT;
	497
	498	if(prot) {
	499	*addr = FLASH_CMD_PROTECT_SET;
	500	} else {
	501	*addr = FLASH_CMD_PROTECT_CLEAR;
	502	}
	503
	504	/* wait for error or finish */
	505	start = get_timer (0);
	506	while(!(addr[0] & FLASH_STATUS_DONE)){
	507	if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
8bde7f77	508	printf("Flash protect timeout at address %lx\n", info->start[sector]);
0db5bca8 WD	509	addr[0] = FLASH_CMD_RESET;
	510	return (1);
	511	}
	512	}
	513	/* Set software protect flag */
	514	info->protect[sector] = prot;
	515	*addr = FLASH_CMD_RESET;
	516	return (0);
	517	}