summaryrefslogtreecommitdiffstats
path: root/board/w7o/flash.c
blob: 20bd920974c6396927db4ced03886fdd066c59fc (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
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
/*
 * (C) Copyright 2001
 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
 *  Based on code by:
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/ppc4xx.h>
#include <asm/processor.h>

#include <watchdog.h>

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

/*
 * Functions
 */
static ulong flash_get_size(vu_long *addr, flash_info_t *info);
static int write_word8(flash_info_t *info, ulong dest, ulong data);
static int write_word32(flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets(ulong base, flash_info_t *info);

unsigned long flash_init(void)
{
	int i;
	unsigned long size_b0, base_b0;
	unsigned long size_b1;

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

	/* Get Size of Boot and Main Flashes */
	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 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0 << 20);
		return 0;
	}
	size_b1 =
		flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
			       &flash_info[1]);
	if (flash_info[1].flash_id == FLASH_UNKNOWN) {
		printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
			size_b1, size_b1 << 20);
		return 0;
	}

	/* Calculate base addresses */
	base_b0 = -size_b0;

	/* Setup offsets for Boot Flash */
	flash_get_offsets(base_b0, &flash_info[0]);

	/* Protect board level data */
	(void) flash_protect(FLAG_PROTECT_SET,
			     base_b0,
			     flash_info[0].start[1] - 1, &flash_info[0]);

	/* Monitor protection ON by default */
	(void) flash_protect(FLAG_PROTECT_SET,
			     base_b0 + size_b0 - monitor_flash_len,
			     base_b0 + size_b0 - 1, &flash_info[0]);

	/* Protect the FPGA image */
	(void) flash_protect(FLAG_PROTECT_SET,
			     FLASH_BASE1_PRELIM,
			     FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN -
			     1, &flash_info[1]);

	/* Protect the default boot image */
	(void) flash_protect(FLAG_PROTECT_SET,
			     FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN,
			     FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN +
			     0x600000 - 1, &flash_info[1]);

	/* Setup offsets for Main Flash */
	flash_get_offsets(FLASH_BASE1_PRELIM, &flash_info[1]);

	return size_b0 + size_b1;
}

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

	/* set up sector start address table - FOR BOOT ROM ONLY!!! */
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00010000);
	}
}				/* end flash_get_offsets() */

void flash_print_info(flash_info_t *info)
{
	int i;
	int k;
	int size;
	int erased;
	volatile unsigned long *flash;

	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("1 x AMD ");
		break;
	case FLASH_MAN_STM:
		printf("1 x STM ");
		break;
	case FLASH_MAN_INTEL:
		printf("2 x Intel ");
		break;
	default:
		printf("Unknown Vendor ");
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:
		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
			printf("AM29LV040 (4096 Kbit, uniform sector size)\n");
		else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM)
			printf("M29W040B (4096 Kbit, uniform block size)\n");
		else
			printf("UNKNOWN 29x040x (4096 Kbit, uniform sector size)\n");
		break;
	case FLASH_28F320J3A:
		printf("28F320J3A (32 Mbit = 128K x 32)\n");
		break;
	case FLASH_28F640J3A:
		printf("28F640J3A (64 Mbit = 128K x 64)\n");
		break;
	case FLASH_28F128J3A:
		printf("28F128J3A (128 Mbit = 128K x 128)\n");
		break;
	default:
		printf("Unknown Chip Type\n");
	}

	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) {
		printf("  Size: %ld KB in %d Blocks\n",
		       info->size >> 10, info->sector_count);
	} else {
		printf("  Size: %ld KB in %d Sectors\n",
		       info->size >> 10, info->sector_count);
	}

	printf("  Sector Start Addresses:");
	for (i = 0; i < info->sector_count; ++i) {
		/*
		 * Check if whole sector is erased
		 */
		if (i != (info->sector_count - 1))
			size = info->start[i + 1] - info->start[i];
		else
			size = info->start[0] + info->size - info->start[i];
		erased = 1;
		flash = (volatile unsigned long *) info->start[i];
		size = size >> 2;	/* divide by 4 for longword access */
		for (k = 0; k < size; k++) {
			if (*flash++ != 0xffffffff) {
				erased = 0;
				break;
			}
		}

		if ((i % 5) == 0)
			printf("\n   ");
		printf(" %08lX%s%s",
		       info->start[i],
		       erased ? " E" : "  ",
		       info->protect[i] ? "RO " : "   ");
	}
	printf("\n");
}				/* end flash_print_info() */

/*
 * The following code cannot be run from FLASH!
 */
static ulong flash_get_size(vu_long *addr, flash_info_t *info)
{
	short i;
	ulong base = (ulong) addr;

	/* Setup default type */
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;

	/* Test for Boot Flash */
	if (base == FLASH_BASE0_PRELIM) {
		unsigned char value;
		volatile unsigned char *addr2 = (unsigned char *) addr;

		/* Write auto select command: read Manufacturer ID */
		*(addr2 + 0x555) = 0xaa;
		*(addr2 + 0x2aa) = 0x55;
		*(addr2 + 0x555) = 0x90;

		/* Manufacture ID */
		value = *addr2;
		switch (value) {
		case (unsigned char) AMD_MANUFACT:
			info->flash_id = FLASH_MAN_AMD;
			break;
		case (unsigned char) STM_MANUFACT:
			info->flash_id = FLASH_MAN_STM;
			break;
		default:
			*addr2 = 0xf0;	/* no or unknown flash  */
			return 0;
		}

		/* Device ID */
		value = *(addr2 + 1);
		switch (value) {
		case (unsigned char) AMD_ID_LV040B:
		case (unsigned char) STM_ID_29W040B:
			info->flash_id += FLASH_AM040;
			info->sector_count = 8;
			info->size = 0x00080000;
			break;	/* => 512Kb */
		default:
			*addr2 = 0xf0;	/* => no or unknown flash */
			return 0;
		}
	} else {		/* MAIN Flash */
		unsigned long value;
		volatile unsigned long *addr2 = (unsigned long *) addr;

		/* Write auto select command: read Manufacturer ID */
		*addr2 = 0x90909090;

		/* Manufacture ID */
		value = *addr2;
		switch (value) {
		case (unsigned long) INTEL_MANUFACT:
			info->flash_id = FLASH_MAN_INTEL;
			break;
		default:
			*addr2 = 0xff;	/* no or unknown flash  */
			return 0;
		}

		/* Device ID - This shit is interleaved... */
		value = *(addr2 + 1);
		switch (value) {
		case (unsigned long) INTEL_ID_28F320J3A:
			info->flash_id += FLASH_28F320J3A;
			info->sector_count = 32;
			info->size = 0x00400000 * 2;
			break;	/* => 2 X 4 MB */
		case (unsigned long) INTEL_ID_28F640J3A:
			info->flash_id += FLASH_28F640J3A;
			info->sector_count = 64;
			info->size = 0x00800000 * 2;
			break;	/* => 2 X 8 MB */
		case (unsigned long) INTEL_ID_28F128J3A:
			info->flash_id += FLASH_28F128J3A;
			info->sector_count = 128;
			info->size = 0x01000000 * 2;
			break;	/* => 2 X 16 MB */
		default:
			*addr2 = 0xff;	/* => no or unknown flash */
		}
	}

	/* Make sure we don't exceed CONFIG_SYS_MAX_FLASH_SECT */
	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;
	}

	/* set up sector start address table */
	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00010000);
		break;
	case FLASH_28F320J3A:
	case FLASH_28F640J3A:
	case FLASH_28F128J3A:
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base +
					(i * 0x00020000 * 2);	/* 2 Banks */
		break;
	}

	/* Test for Boot Flash */
	if (base == FLASH_BASE0_PRELIM) {
		volatile unsigned char *addr2;

		/* check for protected sectors */
		for (i = 0; i < info->sector_count; i++) {
			/*
			 * read sector protection at sector address,
			 * (AX .. A0) = 0x02
			 * D0 = 1 if protected
			 */
			addr2 = (volatile unsigned char *) (info->start[i]);
			info->protect[i] = *(addr2 + 2) & 1;
		}

		/* Restore read mode */
		*(unsigned char *) base = 0xF0;	/* Reset NORMAL Flash */
	} else {		/* Main Flash */
		volatile unsigned long *addr2;

		/* check for protected sectors */
		for (i = 0; i < info->sector_count; i++) {
			/*
			 * read sector protection at sector address,
			 * (AX .. A0) = 0x02
			 * D0 = 1 if protected
			 */
			addr2 = (volatile unsigned long *) (info->start[i]);
			info->protect[i] = *(addr2 + 2) & 0x1;
		}

		/* Restore read mode */
		*(unsigned long *) base = 0xFFFFFFFF;	/* Reset  Flash */
	}

	return info->size;
}				/* end flash_get_size() */

static int wait_for_DQ7(ulong addr, uchar cmp_val, ulong tout)
{
	int i;

	volatile uchar *vaddr = (uchar *) addr;

	/* Loop X times */
	for (i = 1; i <= (100 * tout); i++) {	/* Wait up to tout ms */
		udelay(10);
		/* Pause 10 us */

		/* Check for completion */
		if ((vaddr[0] & 0x80) == (cmp_val & 0x80))
			return 0;

		/* KEEP THE LUSER HAPPY - Print a dot every 1.1 seconds */
		if (!(i % 110000))
			putc('.');

		/* Kick the dog if needed */
		WATCHDOG_RESET();
	}

	return 1;
}				/* wait_for_DQ7() */

static int flash_erase8(flash_info_t *info, int s_first, int s_last)
{
	int tcode, rcode = 0;
	volatile uchar *addr = (uchar *) (info->start[0]);
	volatile uchar *sector_addr;
	int flag, prot, sect;

	/* Validate arguments */
	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;
	}

	/* Check for KNOWN flash type */
	if (info->flash_id == FLASH_UNKNOWN) {
		printf("Can't erase unknown flash type - aborted\n");
		return 1;
	}

	/* Check for protected sectors */
	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 erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			sector_addr = (uchar *) (info->start[sect]);

			if ((info->flash_id & FLASH_VENDMASK) ==
			    FLASH_MAN_STM)
				printf("Erasing block %p\n", sector_addr);
			else
				printf("Erasing sector %p\n", sector_addr);

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

			*(addr + 0x555) = (uchar) 0xAA;
			*(addr + 0x2aa) = (uchar) 0x55;
			*(addr + 0x555) = (uchar) 0x80;
			*(addr + 0x555) = (uchar) 0xAA;
			*(addr + 0x2aa) = (uchar) 0x55;
			*sector_addr = (uchar) 0x30;	/* sector erase */

			/*
			 * Wait for each sector to complete, it's more
			 * reliable.  According to AMD Spec, you must
			 * issue all erase commands within a specified
			 * timeout.  This has been seen to fail, especially
			 * if printf()s are included (for debug)!!
			 * Takes up to 6 seconds.
			 */
			tcode = wait_for_DQ7((ulong) sector_addr, 0x80, 6000);

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

			/* Make sure we didn't timeout */
			if (tcode) {
				printf("Timeout\n");
				rcode = 1;
			}
		}
	}

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

	/* reset to read mode */
	addr = (uchar *) info->start[0];
	*addr = (uchar) 0xF0;	/* reset bank */

	printf(" done\n");
	return rcode;
}				/* end flash_erase8() */

static int flash_erase32(flash_info_t *info, int s_first, int s_last)
{
	int flag, sect;
	ulong start, now, last;
	int prot = 0;

	/* Validate arguments */
	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;
	}

	/* Check for KNOWN flash type */
	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
		printf("Can erase only Intel flash types - aborted\n");
		return 1;
	}

	/* Check for protected sectors */
	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++) {
		WATCHDOG_RESET();
		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 */
			flag = disable_interrupts();

			*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) {
				now = get_timer(start);
				if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
					printf("Timeout\n");
					/* suspend erase      */
					*addr = 0x00B000B0;
					/* reset to read mode */
					*addr = 0x00FF00FF;
					return 1;
				}

				/*
				 * show that we're waiting
				 * every second (?)
				 */
				if ((now - last) > 990) {
					putc('.');
					last = now;
				}
			}
			*addr = 0x00FF00FF;	/* reset to read mode */
		}
	}
	printf(" done\n");
	return 0;
}

int flash_erase(flash_info_t *info, int s_first, int s_last)
{
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
		return flash_erase8(info, s_first, s_last);
	else
		return flash_erase32(info, s_first, s_last);
}

/*
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_buff8(flash_info_t *info, uchar *src, ulong addr,
		       ulong cnt)
{
	ulong cp, wp, data;
	ulong start;
	int i, l, rc;

	start = get_timer(0);

	wp = (addr & ~3);	/* get lower word
				   aligned address */

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

		for (; i < 4 && cnt > 0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}

		for (; cnt == 0 && i < 4; ++i, ++cp)
			data = (data << 8) | (*(uchar *) cp);

		rc = write_word8(info, wp, data);
		if (rc != 0)
			return rc;

		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i = 0; i < 4; ++i)
			data = (data << 8) | *src++;

		rc = write_word8(info, wp, data);
		if (rc != 0)
			return rc;

		wp += 4;
		cnt -= 4;
		if (get_timer(start) > 1000) {	/* every second */
			WATCHDOG_RESET();
			putc('.');
			start = get_timer(0);
		}
	}

	if (cnt == 0)
		return 0;

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}

	for (; i < 4; ++i, ++cp)
		data = (data << 8) | (*(uchar *) cp);

	return write_word8(info, wp, data);
}

#define	FLASH_WIDTH	4	/* flash bus width in bytes */
static int write_buff32(flash_info_t *info, uchar *src, ulong addr,
			ulong cnt)
{
	ulong cp, wp, data;
	int i, l, rc;
	ulong start;

	start = get_timer(0);

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

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

	/*
	 * 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);

		rc = write_word32(info, wp, data);
		if (rc != 0)
			return rc;

		wp += FLASH_WIDTH;
	}

	/*
	 * handle FLASH_WIDTH aligned part
	 */
	while (cnt >= FLASH_WIDTH) {
		data = 0;
		for (i = 0; i < FLASH_WIDTH; ++i)
			data = (data << 8) | *src++;

		rc = write_word32(info, wp, data);
		if (rc != 0)
			return rc;

		wp += FLASH_WIDTH;
		cnt -= FLASH_WIDTH;
		if (get_timer(start) > 990) {	/* every second */
			putc('.');
			start = get_timer(0);
		}
	}

	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_word32(info, wp, data);
}

int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	int retval;

	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
		retval = write_buff8(info, src, addr, cnt);
	else
		retval = write_buff32(info, src, addr, cnt);

	return retval;
}

/*
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */

static int write_word8(flash_info_t *info, ulong dest, ulong data)
{
	volatile uchar *addr2 = (uchar *) (info->start[0]);
	volatile uchar *dest2 = (uchar *) dest;
	volatile uchar *data2 = (uchar *) &data;
	int flag;
	int i, tcode, rcode = 0;

	/* Check if Flash is (sufficently) erased */
	if ((*((volatile uchar *)dest) & (uchar)data) != (uchar)data)
		return 2;

	for (i = 0; i < (4 / sizeof(uchar)); i++) {
		/* Disable interrupts which might cause a timeout here */
		flag = disable_interrupts();

		*(addr2 + 0x555) = (uchar) 0xAA;
		*(addr2 + 0x2aa) = (uchar) 0x55;
		*(addr2 + 0x555) = (uchar) 0xA0;

		dest2[i] = data2[i];

		/* Wait for write to complete, up to 1ms */
		tcode = wait_for_DQ7((ulong) &dest2[i], data2[i], 1);

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

		/* Make sure we didn't timeout */
		if (tcode)
			rcode = 1;
	}

	return rcode;
}

static int write_word32(flash_info_t *info, ulong dest, ulong data)
{
	vu_long *addr = (vu_long *) dest;
	ulong status;
	ulong start;
	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();

	start = get_timer(0);

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

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

	return 0;
}

static int _flash_protect(flash_info_t *info, long sector)
{
	int i;
	int flag;
	ulong status;
	int rcode = 0;
	volatile long *addr = (long *)sector;

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F320J3A:
	case FLASH_28F640J3A:
	case FLASH_28F128J3A:
		/* Disable interrupts which might cause Flash to timeout */
		flag = disable_interrupts();

		/* Issue command */
		*addr = 0x00500050L;	/* Clear the status register */
		*addr = 0x00600060L;	/* Set lock bit setup */
		*addr = 0x00010001L;	/* Set lock bit confirm */

		/* Wait for command completion */
		for (i = 0; i < 10; i++) {	/* 75us timeout, wait 100us */
			udelay(10);
			if ((*addr & 0x00800080L) == 0x00800080L)
				break;
		}

		/* Not successful? */
		status = *addr;
		if (status != 0x00800080L) {
			printf("Protect %x sector failed: %x\n",
			       (uint) sector, (uint) status);
			rcode = 1;
		}

		/* Restore read mode */
		*addr = 0x00ff00ffL;

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

		break;
	case FLASH_AM040:	/* No soft sector protection */
		break;
	}

	/* Turn protection on for this sector */
	for (i = 0; i < info->sector_count; i++) {
		if (info->start[i] == sector) {
			info->protect[i] = 1;
			break;
		}
	}

	return rcode;
}

static int _flash_unprotect(flash_info_t *info, long sector)
{
	int i;
	int flag;
	ulong status;
	int rcode = 0;
	volatile long *addr = (long *) sector;

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F320J3A:
	case FLASH_28F640J3A:
	case FLASH_28F128J3A:
		/* Disable interrupts which might cause Flash to timeout */
		flag = disable_interrupts();

		*addr = 0x00500050L;	/* Clear the status register */
		*addr = 0x00600060L;	/* Clear lock bit setup */
		*addr = 0x00D000D0L;	/* Clear lock bit confirm */

		/* Wait for command completion */
		for (i = 0; i < 80; i++) {	/* 700ms timeout, wait 800 */
			udelay(10000);	/* Delay 10ms */
			if ((*addr & 0x00800080L) == 0x00800080L)
				break;
		}

		/* Not successful? */
		status = *addr;
		if (status != 0x00800080L) {
			printf("Un-protect %x sector failed: %x\n",
			       (uint) sector, (uint) status);
			*addr = 0x00ff00ffL;
			rcode = 1;
		}

		/* restore read mode */
		*addr = 0x00ff00ffL;

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

		break;
	case FLASH_AM040:	/* No soft sector protection */
		break;
	}

	/*
	 * Fix Intel's little red wagon.  Reprotect
	 * sectors that were protected before we undid
	 * protection on a specific sector.
	 */
	for (i = 0; i < info->sector_count; i++) {
		if (info->start[i] != sector) {
			if (info->protect[i]) {
				if (_flash_protect(info, info->start[i]))
					rcode = 1;
			}
		} else		/* Turn protection off for this sector */
			info->protect[i] = 0;
	}

	return rcode;
}

int flash_real_protect(flash_info_t *info, long sector, int prot)
{
	int rcode;

	if (prot)
		rcode = _flash_protect(info, info->start[sector]);
	else
		rcode = _flash_unprotect(info, info->start[sector]);

	return rcode;
}
OpenPOWER on IntegriCloud