summaryrefslogtreecommitdiffstats
path: root/board/mpl/common/flash.c
blob: 61f031aabe81f6a8ba034ec1df05de9f9a802c6b (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
/*
 * (C) Copyright 2000, 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
 */

/*
 * Modified 4/5/2001
 * Wait for completion of each sector erase command issued
 * 4/5/2001
 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
 */

/*
 * Modified 3/7/2001
 * - adapted for pip405, Denis Peter, MPL AG Switzerland
 * TODO:
 * clean-up
 */

#include <common.h>

#if !defined(CONFIG_PATI)
#include <asm/ppc4xx.h>
#include <asm/processor.h>
#include "common_util.h"
#if defined(CONFIG_MIP405)
#include "../mip405/mip405.h"
#endif
#if defined(CONFIG_PIP405)
#include "../pip405/pip405.h"
#endif
#include <asm/4xx_pci.h>
#else /* defined(CONFIG_PATI) */
#include <mpc5xx.h>
#endif

flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);

void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);

#define ADDR0           0x5555
#define ADDR1           0x2aaa
#define FLASH_WORD_SIZE unsigned short

#define FALSE           0
#define TRUE            1

#if !defined(CONFIG_PATI)

/*-----------------------------------------------------------------------
 * Some CS switching routines:
 *
 * On PIP/MIP405 we have 3 (4) possible boot mode
 *
 * - Boot from Flash (Flash CS = CS0, MPS CS = CS1)
 * - Boot from MPS   (Flash CS = CS1, MPS CS = CS0)
 * - Boot from PCI with Flash map (Flash CS = CS0, MPS CS = CS1)
 * - Boot from PCI with MPS map   (Flash CS = CS1, MPS CS = CS0)
 * The flash init is the first board specific routine which is called
 * after code relocation (running from SDRAM)
 * The first thing we do is to map the Flash CS to the Flash area and
 * the MPS CS to the MPS area. Since the flash size is unknown at this
 * point, we use the max flash size and the lowest flash address as base.
 *
 * After flash detection we adjust the size of the CS area accordingly.
 * The board_init_r will fill in wrong values in the board init structure,
 * but this will be fixed in the misc_init_r routine:
 * bd->bi_flashstart=0-flash_info[0].size
 * bd->bi_flashsize=flash_info[0].size-CONFIG_SYS_MONITOR_LEN
 * bd->bi_flashoffset=0
 *
 */
int get_boot_mode(void)
{
	unsigned long pbcr;
	int res = 0;
	pbcr = mfdcr (CPC0_PSR);
	if ((pbcr & PSR_ROM_WIDTH_MASK) == 0)
		/* boot via MPS or MPS mapping */
		res = BOOT_MPS;
	if(pbcr & PSR_ROM_LOC)
		/* boot via PCI.. */
		res |= BOOT_PCI;
	 return res;
}

/* Map the flash high (in boot area)
   This code can only be executed from SDRAM (after relocation).
*/
void setup_cs_reloc(void)
{
	int mode;
	/* Since we are relocated, we can set-up the CS finaly
	 * but first of all, switch off PCI mapping (in case it was a PCI boot) */
	out32r(PMM0MA,0L);
	icache_enable (); /* we are relocated */
	/* get boot mode */
	mode=get_boot_mode();
	/* we map the flash high in every case */
	/* first findout on which cs the flash is */
	if(mode & BOOT_MPS) {
		/* map flash high on CS1 and MPS on CS0 */
		mtdcr (EBC0_CFGADDR, PB0AP);
		mtdcr (EBC0_CFGDATA, MPS_AP);
		mtdcr (EBC0_CFGADDR, PB0CR);
		mtdcr (EBC0_CFGDATA, MPS_CR);
		/* we use the default values (max values) for the flash
		 * because its real size is not yet known */
		mtdcr (EBC0_CFGADDR, PB1AP);
		mtdcr (EBC0_CFGDATA, FLASH_AP);
		mtdcr (EBC0_CFGADDR, PB1CR);
		mtdcr (EBC0_CFGDATA, FLASH_CR_B);
	}
	else {
		/* map flash high on CS0 and MPS on CS1 */
		mtdcr (EBC0_CFGADDR, PB1AP);
		mtdcr (EBC0_CFGDATA, MPS_AP);
		mtdcr (EBC0_CFGADDR, PB1CR);
		mtdcr (EBC0_CFGDATA, MPS_CR);
		/* we use the default values (max values) for the flash
		 * because its real size is not yet known */
		mtdcr (EBC0_CFGADDR, PB0AP);
		mtdcr (EBC0_CFGDATA, FLASH_AP);
		mtdcr (EBC0_CFGADDR, PB0CR);
		mtdcr (EBC0_CFGDATA, FLASH_CR_B);
	}
}

#endif /* #if !defined(CONFIG_PATI) */

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

#if !defined(CONFIG_PATI)
	unsigned long size_b1,flashcr,size_reg;
	int mode;
	extern char version_string;
	char *p = &version_string;

	/* Since we are relocated, we can set-up the CS finally */
	setup_cs_reloc();
	/* get and display boot mode */
	mode=get_boot_mode();
	if(mode & BOOT_PCI)
		printf("(PCI Boot %s Map) ",(mode & BOOT_MPS) ?
			"MPS" : "Flash");
	else
		printf("(%s Boot) ",(mode & BOOT_MPS) ?
			"MPS" : "Flash");
#endif /* #if !defined(CONFIG_PATI) */
	/* 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((vu_long *)CONFIG_SYS_MONITOR_BASE, &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);
	}
	/* protect the bootloader */
	/* Monitor protection ON by default */
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
	flash_protect(FLAG_PROTECT_SET,
			CONFIG_SYS_MONITOR_BASE,
			CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
			&flash_info[0]);
#endif
#if !defined(CONFIG_PATI)
	/* protect reset vector */
	flash_info[0].protect[flash_info[0].sector_count-1] = 1;
	size_b1 = 0 ;
	flash_info[0].size = size_b0;
	/* set up flash cs according to the size */
	size_reg=(flash_info[0].size >>20);
	switch (size_reg) {
		case 0:
		case 1: i=0; break; /* <= 1MB */
		case 2: i=1; break; /* = 2MB */
		case 4: i=2; break; /* = 4MB */
		case 8: i=3; break; /* = 8MB */
		case 16: i=4; break; /* = 16MB */
		case 32: i=5; break; /* = 32MB */
		case 64: i=6; break; /* = 64MB */
		case 128: i=7; break; /*= 128MB */
		default:
			printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
			while(1);
	}
	if(mode & BOOT_MPS) {
		/* flash is on CS1 */
		mtdcr(EBC0_CFGADDR, PB1CR);
		flashcr = mfdcr (EBC0_CFGDATA);
		/* we map the flash high in every case */
		flashcr&=0x0001FFFF; /* mask out address bits */
		flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
		flashcr|= (i << 17); /* size addr */
		mtdcr(EBC0_CFGADDR, PB1CR);
		mtdcr(EBC0_CFGDATA, flashcr);
	}
	else {
		/* flash is on CS0 */
		mtdcr(EBC0_CFGADDR, PB0CR);
		flashcr = mfdcr (EBC0_CFGDATA);
		/* we map the flash high in every case */
		flashcr&=0x0001FFFF; /* mask out address bits */
		flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
		flashcr|= (i << 17); /* size addr */
		mtdcr(EBC0_CFGADDR, PB0CR);
		mtdcr(EBC0_CFGDATA, flashcr);
	}
#if 0
	/* enable this (PIP405/MIP405 only) if you want to test if
	   the relocation has be done ok.
	   This will disable both Chipselects */
	mtdcr (EBC0_CFGADDR, PB0CR);
	mtdcr (EBC0_CFGDATA, 0L);
	mtdcr (EBC0_CFGADDR, PB1CR);
	mtdcr (EBC0_CFGDATA, 0L);
	printf("CS0 & CS1 switched off for test\n");
#endif
	/* patch version_string */
	for(i=0;i<0x100;i++) {
		if(*p=='\n') {
			*p=0;
			break;
		}
		p++;
	}
#else /* #if !defined(CONFIG_PATI) */
#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
		      &flash_info[0]);
#endif
#endif /* #if !defined(CONFIG_PATI) */
	return (size_b0);
}


/*-----------------------------------------------------------------------
 */
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 ("AMD ");		break;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	case FLASH_MAN_SST:	printf ("SST ");		break;
	case FLASH_MAN_INTEL:	printf ("Intel ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
				break;
	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
				break;
	case FLASH_SST800A:	printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
				break;
	case FLASH_SST160A:	printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
				break;
	case FLASH_INTEL320T:	printf ("TE28F320C3 (32 Mbit, top sector size)\n");
				break;
	case FLASH_AM640U:	printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
				break;
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	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");
}

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


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

*/

/*
 * The following code cannot be run from FLASH!
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
	short i;
	FLASH_WORD_SIZE value;
	ulong base;
	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;

	/* Write auto select command: read Manufacturer ID */
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;

	value = addr2[0];
	/*	printf("flash_get_size value: %x\n",value); */
	switch (value) {
	case (FLASH_WORD_SIZE)AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FLASH_WORD_SIZE)FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (FLASH_WORD_SIZE)INTEL_MANUFACT:
		info->flash_id = FLASH_MAN_INTEL;
		break;
	case (FLASH_WORD_SIZE)SST_MANUFACT:
		info->flash_id = FLASH_MAN_SST;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}
	value = addr2[1];			/* device ID		*/
	/*	printf("Device value %x\n",value);		    */
	switch (value) {
	case (FLASH_WORD_SIZE)AMD_ID_F040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x0080000; /* => 512 ko */
		break;
	case (FLASH_WORD_SIZE)AMD_ID_LV400T:
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;				/* => 0.5 MB		*/

	case (FLASH_WORD_SIZE)AMD_ID_LV400B:
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;				/* => 0.5 MB		*/

	case (FLASH_WORD_SIZE)AMD_ID_LV800T:
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (FLASH_WORD_SIZE)AMD_ID_LV800B:
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (FLASH_WORD_SIZE)AMD_ID_LV160T:
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (FLASH_WORD_SIZE)AMD_ID_LV160B:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/
	case (FLASH_WORD_SIZE)AMD_ID_LV320T:
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/
	case (FLASH_WORD_SIZE)AMD_ID_LV640U:
		info->flash_id += FLASH_AM640U;
		info->sector_count = 128;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/
#if 0	/* enable when device IDs are available */

	case (FLASH_WORD_SIZE)AMD_ID_LV320B:
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/
#endif
	case (FLASH_WORD_SIZE)SST_ID_xF800A:
		info->flash_id += FLASH_SST800A;
		info->sector_count = 16;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/
	case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
		info->flash_id += FLASH_INTEL320T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/


	case (FLASH_WORD_SIZE)SST_ID_xF160A:
		info->flash_id += FLASH_SST160A;
		info->sector_count = 32;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}
	/* base address calculation */
	base=0-info->size;
	/* set up sector start address table */
	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
	     (info->flash_id  == FLASH_AM040) ||
	     (info->flash_id  == FLASH_AM640U)){
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00010000);
	}
	else {
		if (info->flash_id & FLASH_BTYPE) {
			/* set sector offsets for bottom boot block type	*/
			info->start[0] = base + 0x00000000;
			info->start[1] = base + 0x00004000;
			info->start[2] = base + 0x00006000;
			info->start[3] = base + 0x00008000;
			for (i = 4; i < info->sector_count; i++)
				info->start[i] = base + (i * 0x00010000) - 0x00030000;
		}
		else {
			/* set sector offsets for top boot block type		*/
			i = info->sector_count - 1;
			if(info->sector_count==71) {

				info->start[i--] = base + info->size - 0x00002000;
				info->start[i--] = base + info->size - 0x00004000;
				info->start[i--] = base + info->size - 0x00006000;
				info->start[i--] = base + info->size - 0x00008000;
				info->start[i--] = base + info->size - 0x0000A000;
				info->start[i--] = base + info->size - 0x0000C000;
				info->start[i--] = base + info->size - 0x0000E000;
				for (; i >= 0; i--)
					info->start[i] = base + i * 0x000010000;
			}
			else {
				info->start[i--] = base + info->size - 0x00004000;
				info->start[i--] = base + info->size - 0x00006000;
				info->start[i--] = base + info->size - 0x00008000;
				for (; i >= 0; i--)
					info->start[i] = base + i * 0x00010000;
			}
		}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		/* D0 = 1 if protected */
		addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
			info->protect[i] = 0;
		else
			info->protect[i] = addr2[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr2 = (FLASH_WORD_SIZE *)info->start[0];
		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
	}
	return (info->size);
}


int wait_for_DQ7(flash_info_t *info, int sect)
{
	ulong start, now, last;
	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);

	start = get_timer (0);
	last  = start;
	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return ERR_TIMOUT;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {  /* every second */
			putc ('.');
			last = now;
		}
	}
	return ERR_OK;
}

int intel_wait_for_DQ7(flash_info_t *info, int sect)
{
	ulong start, now, last, status;
	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);

	start = get_timer (0);
	last  = start;
	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return ERR_TIMOUT;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {  /* every second */
			putc ('.');
			last = now;
		}
	}
	status = addr[0] & (FLASH_WORD_SIZE)0x00280028;
	/* clear status register */
	addr[0] = (FLASH_WORD_SIZE)0x00500050;
	/* check status for block erase fail and VPP low */
	return (status == 0 ? ERR_OK : ERR_NOT_ERASED);
}

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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
	volatile FLASH_WORD_SIZE *addr2;
	int flag, prot, sect, l_sect;
	int i, 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;
	}

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("Can't erase unknown flash type - 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");
	}

	l_sect = -1;

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

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
			/*  printf("Erasing sector %p\n", addr2); */ /* CLH */
			if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
				for (i=0; i<50; i++)
					udelay(1000);  /* wait 1 ms */
				rcode |= wait_for_DQ7(info, sect);
			}
			else {
				if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
					addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
					addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
					intel_wait_for_DQ7(info, sect);
					addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
					addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
					rcode |= intel_wait_for_DQ7(info, sect);
				}
				else {
					addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
					addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
					addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
					addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
					addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
					addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
					rcode |= wait_for_DQ7(info, sect);
				}
			}
			l_sect = sect;
			/*
			 * 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)!!
			 */
			/*   wait_for_DQ7(info, sect); */
		}
	}

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

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

#if 0
	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;
	wait_for_DQ7(info, l_sect);

DONE:
#endif
	/* reset to read mode */
	addr = (FLASH_WORD_SIZE *)info->start[0];
	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */

	if (!rcode)
	    printf (" done\n");

	return rcode;
}


void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
{
	int i;
	volatile FLASH_WORD_SIZE *addr2;
	long c;
	c= (long)cnt;
	for(i=info->sector_count-1;i>0;i--)
	{
		if(addr>=info->start[i])
			break;
	}
	do {
		addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
		addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
		addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
		intel_wait_for_DQ7(info, i);
		i++;
		c-=(info->start[i]-info->start[i-1]);
	}while(c>0);
}


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

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_VENDMASK) == FLASH_MAN_INTEL){
		unlock_intel_sectors(info,addr,cnt);
	}
	wp = (addr & ~3);	/* get lower word 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<4 && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<4; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i=0; i<4; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 4;
		if((wp % 0x10000)==0)
			printf("."); /* show Progress */
		cnt -= 4;
	}

	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);
	}
	rc=write_word(info, wp, data);
	return rc;
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;

static int write_word (flash_info_t *info, ulong dest, ulong data)
{
	volatile FLASH_WORD_SIZE *addr2 = (volatile FLASH_WORD_SIZE *)(info->start[0]);
	volatile FLASH_WORD_SIZE *dest2 = (volatile FLASH_WORD_SIZE *)dest;
	volatile FLASH_WORD_SIZE *data2;
	ulong start;
	ulong *data_p;
	int flag;
	int i;

	data_p = &data;
	data2 = (volatile FLASH_WORD_SIZE *)data_p;

	/* Check if Flash is (sufficiently) erased */
	if ((*((volatile FLASH_WORD_SIZE *)dest) &
		(FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();
	for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
	{
		if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
			/* intel style writting */
			dest2[i] = (FLASH_WORD_SIZE)0x00500050;
			dest2[i] = (FLASH_WORD_SIZE)0x00400040;
			*read_val++ = data2[i];
			dest2[i] = data2[i];
			if (flag)
				enable_interrupts();
			/* data polling for D7 */
			start = get_timer (0);
			udelay(10);
			while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
			{
				if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
					return (1);
			}
			dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
			udelay(10);
			dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
			if(dest2[i]!=data2[i])
				printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
		}
		else {
			addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
			addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
			addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
			dest2[i] = data2[i];
			/* re-enable interrupts if necessary */
			if (flag)
				enable_interrupts();
			/* data polling for D7 */
			start = get_timer (0);
			while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
				(data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
				if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
					return (1);
				}
			}
		}
	}
	return (0);
}

/*-----------------------------------------------------------------------
 */
OpenPOWER on IntegriCloud