summaryrefslogtreecommitdiff
path: root/board/lwmon/flash.c
blob: b894887c937129013e5abca3c9e14a010e4f3eb6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
/*
 * (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>

#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

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

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

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_data (flash_info_t *info, ulong dest, ulong data);
#ifdef CFG_FLASH_USE_BUFFER_WRITE
static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
#endif
static void flash_get_offsets (ulong base, flash_info_t *info);

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

unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0, size_b1;
	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 */

	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);

	size_b0 = flash_get_size((vu_long *)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);
	}

	debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);

	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);

	debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	if (size_b1 > size_b0) {
		printf ("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1<<20,
			size_b0, size_b0<<20
		);
		flash_info[0].flash_id	= FLASH_UNKNOWN;
		flash_info[1].flash_id	= FLASH_UNKNOWN;
		flash_info[0].sector_count	= -1;
		flash_info[1].sector_count	= -1;
		flash_info[0].size		= 0;
		flash_info[1].size		= 0;
		return (0);
	}

	debug  ("## Before remap: "
		"BR0: 0x%08x    OR0: 0x%08x    "
		"BR1: 0x%08x    OR1: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0,
		memctl->memc_br1, memctl->memc_or1);

	/* Remap FLASH according to real size */
	memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
				OR_CSNT_SAM | OR_ACS_DIV1;
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V;

	debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0);

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

	flash_get_offsets (CFG_FLASH_BASE, &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

	if (size_b1) {
		memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
					OR_CSNT_SAM | OR_ACS_DIV1;
		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
					BR_PS_32 | BR_V;

		debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
			memctl->memc_br1, memctl->memc_or1);

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
					  &flash_info[1]);

		flash_info[1].size = size_b1;

		flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);

#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[1]);
#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[1]);
#endif
	} else {
		memctl->memc_br1 = 0;		/* invalidate bank */
		memctl->memc_or1 = 0;		/* invalidate bank */

		debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
			memctl->memc_br1, memctl->memc_or1);

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
		flash_info[1].size = 0;
	}

	debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	return (size_b0 + size_b1);
}

/*-----------------------------------------------------------------------
 */
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 * 2;		/* 128k * 2 chips 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 (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;
}

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


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

/*
 * The following code cannot be run from FLASH!
 */

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

	/* Read Manufacturer ID */
	addr[0] = 0x00900090;
	value = addr[0];

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

	switch (value) {
	case AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case SST_MANUFACT:
		info->flash_id = FLASH_MAN_SST;
		break;
	case STM_MANUFACT:
		info->flash_id = FLASH_MAN_STM;
		break;
	case INTEL_MANUFACT:
		info->flash_id = FLASH_MAN_INTEL;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = 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 INTEL_ID_28F320J3A:
		info->flash_id += FLASH_28F320J3A;
		info->sector_count = 32;
		info->size = 0x00400000 * 2;
		break;				/* =>  8 MB		*/

	case INTEL_ID_28F640J3A:
		info->flash_id += FLASH_28F640J3A;
		info->sector_count = 64;
		info->size = 0x00800000 * 2;
		break;				/* => 16 MB		*/

	case INTEL_ID_28F128J3A:
		info->flash_id += FLASH_28F128J3A;
		info->sector_count = 128;
		info->size = 0x01000000 * 2;
		break;				/* => 32 MB		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		addr[0] = 0x00FF00FF;		/* 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] = 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 start, now, last;

	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}

	if ((info->flash_id & FLASH_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_long *addr = (vu_long *)(info->start[sect]);
			unsigned long status;

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

			*addr = 0x00600060;	/* clear lock bit setup */
			*addr = 0x00D000D0;	/* clear lock bit confirm */

			udelay (1000);
			/* This takes awfully long - up to 50 ms and more */
			while (((status = *addr) & 0x00800080) != 0x00800080) {
				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					*addr = 0x00FF00FF; /* reset to read mode */
					return 1;
				}

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

			*addr = 0x00500050;	/* clear status register */
			*addr = 0x00200020;	/* erase setup */
			*addr = 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) & 0x00800080) != 0x00800080) {
				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					*addr = 0x00B000B0; /* suspend erase	  */
					*addr = 0x00FF00FF; /* reset to read mode */
					return 1;
				}

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

			*addr = 0x00FF00FF;	/* 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	4	/* flash bus width in bytes */

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

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

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

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

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

	/*
	 * handle FLASH_WIDTH aligned part
	 */
#ifdef CFG_FLASH_USE_BUFFER_WRITE
	while(cnt >= FLASH_WIDTH) {
		i = CFG_FLASH_BUFFER_SIZE > cnt ?
		    (cnt & ~(FLASH_WIDTH - 1)) : CFG_FLASH_BUFFER_SIZE;
		if((rc = write_data_buf(info, wp, src,i)) != 0)
			return rc;
		wp += i;
		src += i;
		cnt -=i;
	}
#else
	while (cnt >= FLASH_WIDTH) {
		data = 0;
		for (i=0; i<FLASH_WIDTH; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_data(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += FLASH_WIDTH;
		cnt -= FLASH_WIDTH;
	}
#endif /* CFG_FLASH_USE_BUFFER_WRITE */

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

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

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

/*-----------------------------------------------------------------------
 * Check flash status, returns:
 * 0 - OK
 * 1 - timeout
 */
static int flash_status_check(vu_long *addr, ulong tout, char * prompt)
{
	ulong status;
	ulong start;

	/* Wait for command completion */
	start = get_timer (0);
	while(((status = *addr) & 0x00800080) != 0x00800080) {
		if (get_timer(start) > tout) {
			printf("Flash %s timeout at address %p\n", prompt, addr);
			*addr = 0x00FF00FF;	/* restore read mode */
			return (1);
		}
	}
	return 0;
}

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

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

	*addr = 0x00400040;		/* write setup */
	*addr = data;

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

	if (flash_status_check(addr, CFG_FLASH_WRITE_TOUT, "write") != 0) {
		return (1);
	}

	*addr = 0x00FF00FF;	/* restore read mode */

	return (0);
}

#ifdef CFG_FLASH_USE_BUFFER_WRITE
/*-----------------------------------------------------------------------
 * Write a buffer to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 */
static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
{
	vu_long *addr = (vu_long *)dest;
	int sector;
	int cnt;
	int retcode;
	vu_long * src = (vu_long *)cp;
	vu_long * dst = (vu_long *)dest;

	/* find sector */
	for(sector = info->sector_count - 1; sector >= 0; sector--) {
		if(dest >= info->start[sector])
			break;
	}

	*addr = 0x00500050;		/* clear status */
	*addr = 0x00e800e8;		/* write buffer */

	if((retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
					 "write to buffer")) == 0) {
		cnt = len / FLASH_WIDTH;
		*addr = (cnt-1) | ((cnt-1) << 16);
		while(cnt-- > 0) {
			*dst++ = *src++;
		}
		*addr = 0x00d000d0;		/* write buffer confirm */
		retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
						 "buffer write");
	}
	*addr = 0x00FF00FF;	/* restore read mode */
	*addr = 0x00500050;	/* clear status */
	return retcode;
}
#endif /* CFG_USE_FLASH_BUFFER_WRITE */

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