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#include <common.h>
34#include <asm/processor.h>
35
36#undef DEBUG_FLASH
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55#define FLASH_CMD_CFI 0x98
56#define FLASH_CMD_READ_ID 0x90
57#define FLASH_CMD_RESET 0xff
58#define FLASH_CMD_BLOCK_ERASE 0x20
59#define FLASH_CMD_ERASE_CONFIRM 0xD0
60#define FLASH_CMD_WRITE 0x40
61#define FLASH_CMD_PROTECT 0x60
62#define FLASH_CMD_PROTECT_SET 0x01
63#define FLASH_CMD_PROTECT_CLEAR 0xD0
64#define FLASH_CMD_CLEAR_STATUS 0x50
65#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
66#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
67
68#define FLASH_STATUS_DONE 0x80
69#define FLASH_STATUS_ESS 0x40
70#define FLASH_STATUS_ECLBS 0x20
71#define FLASH_STATUS_PSLBS 0x10
72#define FLASH_STATUS_VPENS 0x08
73#define FLASH_STATUS_PSS 0x04
74#define FLASH_STATUS_DPS 0x02
75#define FLASH_STATUS_R 0x01
76#define FLASH_STATUS_PROTECT 0x01
77
78#define FLASH_OFFSET_CFI 0x55
79#define FLASH_OFFSET_CFI_RESP 0x10
80#define FLASH_OFFSET_WTOUT 0x1F
81#define FLASH_OFFSET_WBTOUT 0x20
82#define FLASH_OFFSET_ETOUT 0x21
83#define FLASH_OFFSET_CETOUT 0x22
84#define FLASH_OFFSET_WMAX_TOUT 0x23
85#define FLASH_OFFSET_WBMAX_TOUT 0x24
86#define FLASH_OFFSET_EMAX_TOUT 0x25
87#define FLASH_OFFSET_CEMAX_TOUT 0x26
88#define FLASH_OFFSET_SIZE 0x27
89#define FLASH_OFFSET_INTERFACE 0x28
90#define FLASH_OFFSET_BUFFER_SIZE 0x2A
91#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
92#define FLASH_OFFSET_ERASE_REGIONS 0x2D
93#define FLASH_OFFSET_PROTECT 0x02
94#define FLASH_OFFSET_USER_PROTECTION 0x85
95#define FLASH_OFFSET_INTEL_PROTECTION 0x81
96
97#define FLASH_MAN_CFI 0x01000000
98
99typedef union {
100 unsigned char c;
101 unsigned short w;
102 unsigned long l;
103} cfiword_t;
104
105typedef union {
106 unsigned char *cp;
107 unsigned short *wp;
108 unsigned long *lp;
109} cfiptr_t;
110
111#define NUM_ERASE_REGIONS 4
112
113flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
114
115
116
117
118
119static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c);
120static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
121static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
122 uchar cmd);
123static int flash_isequal (flash_info_t * info, int sect, uchar offset,
124 uchar cmd);
125static int flash_isset (flash_info_t * info, int sect, uchar offset,
126 uchar cmd);
127static int flash_detect_cfi (flash_info_t * info);
128static ulong flash_get_size (ulong base, int banknum);
129static int flash_write_cfiword (flash_info_t * info, ulong dest,
130 cfiword_t cword);
131static int flash_full_status_check (flash_info_t * info, ulong sector,
132 ulong tout, char *prompt);
133#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
134static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
135 int len);
136#endif
137
138
139
140uchar *flash_make_addr (flash_info_t * info, int sect, int offset)
141{
142 return ((uchar *) (info->start[sect] + (offset * info->chipwidth)));
143}
144
145
146
147
148uchar flash_read_uchar (flash_info_t * info, uchar offset)
149{
150 if (info->portwidth == FLASH_CFI_8BIT) {
151 volatile uchar *cp;
152 uchar c;
153
154 cp = flash_make_addr (info, 0, offset);
155 c = *cp;
156#ifdef DEBUG_FLASH
157 printf ("flash_read_uchar offset=%04x ptr=%08x c=%02x\n",
158 offset, (unsigned int) cp, c);
159#endif
160 return (c);
161
162 } else if (info->portwidth == FLASH_CFI_16BIT) {
163 volatile ushort *sp;
164 ushort s;
165 uchar c;
166
167 sp = (ushort *) flash_make_addr (info, 0, offset);
168 s = *sp;
169 c = (uchar) s;
170#ifdef DEBUG_FLASH
171 printf ("flash_read_uchar offset=%04x ptr=%08x s=%04x c=%02x\n", offset, (unsigned int) sp, s, c);
172#endif
173 return (c);
174
175 }
176
177 return 0;
178}
179
180
181
182
183ushort flash_read_ushort (flash_info_t * info, int sect, uchar offset)
184{
185 if (info->portwidth == FLASH_CFI_8BIT) {
186 volatile uchar *cp;
187 uchar c0, c1;
188 ushort s;
189
190 cp = flash_make_addr (info, 0, offset);
191 c1 = cp[2];
192 c0 = cp[0];
193 s = c1 << 8 | c0;
194#ifdef DEBUG_FLASH
195 printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) cp, c1, c0, s);
196#endif
197 return (s);
198
199 } else if (info->portwidth == FLASH_CFI_16BIT) {
200 volatile ushort *sp;
201 ushort s;
202 uchar c0, c1;
203
204 sp = (ushort *) flash_make_addr (info, 0, offset);
205 s = *sp;
206 c1 = (uchar) sp[1];
207 c0 = (uchar) sp[0];
208 s = c1 << 8 | c0;
209#ifdef DEBUG_FLASH
210 printf ("flash_read_ushort offset=%04x ptr=%08x c1=%02x c0=%02x s=%04x\n", offset, (unsigned int) sp, c1, c0, s);
211#endif
212 return (s);
213
214 }
215
216 return 0;
217}
218
219
220
221
222
223ulong flash_read_long (flash_info_t * info, int sect, uchar offset)
224{
225 if (info->portwidth == FLASH_CFI_8BIT) {
226 volatile uchar *cp;
227 uchar c0, c1, c2, c3;
228 ulong l;
229
230 cp = flash_make_addr (info, 0, offset);
231 c3 = cp[6];
232 c2 = cp[4];
233 c1 = cp[2];
234 c0 = cp[0];
235 l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
236#ifdef DEBUG_FLASH
237 printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) cp, c3, c2, c1, c0, l);
238#endif
239 return (l);
240
241 } else if (info->portwidth == FLASH_CFI_16BIT) {
242 volatile ushort *sp;
243 uchar c0, c1, c2, c3;
244 ulong l;
245
246 sp = (ushort *) flash_make_addr (info, 0, offset);
247 c3 = (uchar) sp[3];
248 c2 = (uchar) sp[2];
249 c1 = (uchar) sp[1];
250 c0 = (uchar) sp[0];
251 l = c3 << 24 | c2 << 16 | c1 << 8 | c0;
252#ifdef DEBUG_FLASH
253 printf ("flash_read_long offset=%04x ptr=%08x c3=%02x c2=%02x c1=%02x c0=%02x l=%08x\n", offset, (unsigned int) sp, c3, c2, c1, c0, l);
254#endif
255 return (l);
256
257 }
258
259 return 0;
260}
261
262
263
264unsigned long flash_init (void)
265{
266 unsigned long size;
267
268 size = 0;
269
270 flash_info[0].flash_id = FLASH_UNKNOWN;
271 flash_info[0].portwidth = FLASH_CFI_16BIT;
272 flash_info[0].chipwidth = FLASH_CFI_16BIT;
273 size += flash_info[0].size = flash_get_size (CONFIG_SYS_PROGFLASH_BASE, 0);
274 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
275 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 1, flash_info[0].size, flash_info[0].size << 20);
276 };
277
278 flash_info[1].flash_id = FLASH_UNKNOWN;
279 flash_info[1].portwidth = FLASH_CFI_8BIT;
280 flash_info[1].chipwidth = FLASH_CFI_16BIT;
281 size += flash_info[1].size = flash_get_size (CONFIG_SYS_CONFFLASH_BASE, 1);
282 if (flash_info[1].flash_id == FLASH_UNKNOWN) {
283 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", 2, flash_info[1].size, flash_info[1].size << 20);
284 };
285
286 return (size);
287}
288
289
290
291int flash_erase (flash_info_t * info, int s_first, int s_last)
292{
293 int rcode = 0;
294 int prot;
295 int sect;
296
297 if (info->flash_id != FLASH_MAN_CFI) {
298 printf ("Can't erase unknown flash type - aborted\n");
299 return 1;
300 }
301 if ((s_first < 0) || (s_first > s_last)) {
302 printf ("- no sectors to erase\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 if (prot) {
313 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
314 } else {
315 printf ("\n");
316 }
317
318 for (sect = s_first; sect <= s_last; sect++) {
319 if (info->protect[sect] == 0) {
320 flash_write_cmd (info, sect, 0,
321 FLASH_CMD_CLEAR_STATUS);
322 flash_write_cmd (info, sect, 0,
323 FLASH_CMD_BLOCK_ERASE);
324 flash_write_cmd (info, sect, 0,
325 FLASH_CMD_ERASE_CONFIRM);
326
327 if (flash_full_status_check
328 (info, sect, info->erase_blk_tout, "erase")) {
329 rcode = 1;
330 } else
331 printf (".");
332 }
333 }
334 printf (" done\n");
335 return rcode;
336}
337
338
339
340void flash_print_info (flash_info_t * info)
341{
342 int i;
343
344 if (info->flash_id != FLASH_MAN_CFI) {
345 printf ("missing or unknown FLASH type\n");
346 return;
347 }
348
349 printf ("CFI conformant FLASH (x%d device in x%d mode)",
350 (info->chipwidth << 3), (info->portwidth << 3));
351 printf (" Size: %ld MB in %d Sectors\n",
352 info->size >> 20, info->sector_count);
353 printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
354
355 printf (" Sector Start Addresses:");
356 for (i = 0; i < info->sector_count; ++i) {
357 if ((i % 5) == 0)
358 printf ("\n");
359 printf (" %08lX%5s",
360 info->start[i], info->protect[i] ? " (RO)" : " ");
361 }
362 printf ("\n");
363 return;
364}
365
366
367
368
369
370
371
372int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
373{
374 ulong wp;
375 ulong cp;
376 int aln;
377 cfiword_t cword;
378 int i, rc;
379
380
381 wp = (addr & ~(info->portwidth - 1));
382
383
384 if ((aln = addr - wp) != 0) {
385 cword.l = 0;
386 cp = wp;
387 for (i = 0; i < aln; ++i, ++cp)
388 flash_add_byte (info, &cword, (*(uchar *) cp));
389
390 for (; (i < info->portwidth) && (cnt > 0); i++) {
391 flash_add_byte (info, &cword, *src++);
392 cnt--;
393 cp++;
394 }
395 for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
396 flash_add_byte (info, &cword, (*(uchar *) cp));
397 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
398 return rc;
399 wp = cp;
400 }
401#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
402 while (cnt >= info->portwidth) {
403 i = info->buffer_size > cnt ? cnt : info->buffer_size;
404 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
405 return rc;
406 wp += i;
407 src += i;
408 cnt -= i;
409 }
410#else
411
412 while (cnt >= info->portwidth) {
413 cword.l = 0;
414 for (i = 0; i < info->portwidth; i++) {
415 flash_add_byte (info, &cword, *src++);
416 }
417 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
418 return rc;
419 wp += info->portwidth;
420 cnt -= info->portwidth;
421 }
422#endif
423 if (cnt == 0) {
424 return (0);
425 }
426
427
428
429
430 cword.l = 0;
431 for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
432 flash_add_byte (info, &cword, *src++);
433 --cnt;
434 }
435 for (; i < info->portwidth; ++i, ++cp) {
436 flash_add_byte (info, &cword, (*(uchar *) cp));
437 }
438
439 return flash_write_cfiword (info, wp, cword);
440}
441
442
443
444int flash_real_protect (flash_info_t * info, long sector, int prot)
445{
446 int retcode = 0;
447
448 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
449 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
450 if (prot)
451 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
452 else
453 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
454
455 if ((retcode =
456 flash_full_status_check (info, sector, info->erase_blk_tout,
457 prot ? "protect" : "unprotect")) == 0) {
458
459 info->protect[sector] = prot;
460
461 if (prot == 0) {
462 int i;
463
464 for (i = 0; i < info->sector_count; i++) {
465 if (info->protect[i])
466 flash_real_protect (info, i, 1);
467 }
468 }
469 }
470
471 return retcode;
472}
473
474
475
476
477
478static int flash_status_check (flash_info_t * info, ulong sector, ulong tout,
479 char *prompt)
480{
481 ulong start;
482
483
484 start = get_timer (0);
485 while (!flash_isset (info, sector, 0, FLASH_STATUS_DONE)) {
486 if (get_timer (start) > info->erase_blk_tout) {
487 printf ("Flash %s timeout at address %lx\n", prompt,
488 info->start[sector]);
489 flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
490 return ERR_TIMOUT;
491 }
492 }
493 return ERR_OK;
494}
495
496
497
498
499
500static int flash_full_status_check (flash_info_t * info, ulong sector,
501 ulong tout, char *prompt)
502{
503 int retcode;
504
505 retcode = flash_status_check (info, sector, tout, prompt);
506 if ((retcode == ERR_OK)
507 && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
508 retcode = ERR_INVAL;
509 printf ("Flash %s error at address %lx\n", prompt,
510 info->start[sector]);
511 if (flash_isset
512 (info, sector, 0,
513 FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
514 printf ("Command Sequence Error.\n");
515 } else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
516 printf ("Block Erase Error.\n");
517 retcode = ERR_NOT_ERASED;
518 } else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
519 printf ("Locking Error\n");
520 }
521 if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
522 printf ("Block locked.\n");
523 retcode = ERR_PROTECTED;
524 }
525 if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
526 printf ("Vpp Low Error.\n");
527 }
528 flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
529 return retcode;
530}
531
532
533
534static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
535{
536 switch (info->portwidth) {
537 case FLASH_CFI_8BIT:
538 cword->c = c;
539 break;
540 case FLASH_CFI_16BIT:
541 cword->w = (cword->w << 8) | c;
542 break;
543 case FLASH_CFI_32BIT:
544 cword->l = (cword->l << 8) | c;
545 }
546}
547
548
549
550
551static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
552{
553
554 uchar *cp = (uchar *) cmdbuf;
555
556
557
558 if (info->portwidth == FLASH_CFI_8BIT
559 && info->chipwidth == FLASH_CFI_16BIT) {
560 cp[0] = cmd;
561 } else if (info->portwidth == FLASH_CFI_16BIT
562 && info->chipwidth == FLASH_CFI_16BIT) {
563 cp[0] = '\0';
564 cp[1] = cmd;
565 };
566}
567
568
569
570
571static void flash_write_cmd (flash_info_t * info, int sect, uchar offset,
572 uchar cmd)
573{
574
575 volatile cfiptr_t addr;
576 cfiword_t cword;
577
578 addr.cp = flash_make_addr (info, sect, offset);
579 flash_make_cmd (info, cmd, &cword);
580 switch (info->portwidth) {
581 case FLASH_CFI_8BIT:
582 *addr.cp = cword.c;
583 break;
584 case FLASH_CFI_16BIT:
585 *addr.wp = cword.w;
586 break;
587 case FLASH_CFI_32BIT:
588 *addr.lp = cword.l;
589 break;
590 }
591}
592
593
594
595static int flash_isequal (flash_info_t * info, int sect, uchar offset,
596 uchar cmd)
597{
598 cfiptr_t cptr;
599 cfiword_t cword;
600 int retval;
601
602 cptr.cp = flash_make_addr (info, sect, offset);
603 flash_make_cmd (info, cmd, &cword);
604 switch (info->portwidth) {
605 case FLASH_CFI_8BIT:
606 retval = (cptr.cp[0] == cword.c);
607 break;
608 case FLASH_CFI_16BIT:
609 retval = (cptr.wp[0] == cword.w);
610 break;
611 case FLASH_CFI_32BIT:
612 retval = (cptr.lp[0] == cword.l);
613 break;
614 default:
615 retval = 0;
616 break;
617 }
618 return retval;
619}
620
621
622
623static int flash_isset (flash_info_t * info, int sect, uchar offset,
624 uchar cmd)
625{
626 cfiptr_t cptr;
627 cfiword_t cword;
628 int retval;
629
630 cptr.cp = flash_make_addr (info, sect, offset);
631 flash_make_cmd (info, cmd, &cword);
632 switch (info->portwidth) {
633 case FLASH_CFI_8BIT:
634 retval = ((cptr.cp[0] & cword.c) == cword.c);
635 break;
636 case FLASH_CFI_16BIT:
637 retval = ((cptr.wp[0] & cword.w) == cword.w);
638 break;
639 case FLASH_CFI_32BIT:
640 retval = ((cptr.lp[0] & cword.l) == cword.l);
641 break;
642 default:
643 retval = 0;
644 break;
645 }
646 return retval;
647}
648
649
650
651
652
653
654static int flash_detect_cfi (flash_info_t * info)
655{
656
657#if 0
658 for (info->portwidth = FLASH_CFI_8BIT;
659 info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) {
660 for (info->chipwidth = FLASH_CFI_BY8;
661 info->chipwidth <= info->portwidth;
662 info->chipwidth <<= 1) {
663 flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
664 flash_write_cmd (info, 0, FLASH_OFFSET_CFI,
665 FLASH_CMD_CFI);
666 if (flash_isequal
667 (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
668 && flash_isequal (info, 0,
669 FLASH_OFFSET_CFI_RESP + 1, 'R')
670 && flash_isequal (info, 0,
671 FLASH_OFFSET_CFI_RESP + 2, 'Y'))
672 return 1;
673 }
674 }
675#endif
676 flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
677 flash_write_cmd (info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
678 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q') &&
679 flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
680 flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
681 return 1;
682 } else {
683 return 0;
684 };
685}
686
687
688
689
690
691static ulong flash_get_size (ulong base, int banknum)
692{
693 flash_info_t *info = &flash_info[banknum];
694 int i, j;
695 int sect_cnt;
696 unsigned long sector;
697 unsigned long tmp;
698 int size_ratio;
699 uchar num_erase_regions;
700 int erase_region_size;
701 int erase_region_count;
702
703 info->start[0] = base;
704
705 if (flash_detect_cfi (info)) {
706#ifdef DEBUG_FLASH
707 printf ("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth);
708#endif
709 size_ratio = 1;
710 num_erase_regions =
711 flash_read_uchar (info,
712 FLASH_OFFSET_NUM_ERASE_REGIONS);
713#ifdef DEBUG_FLASH
714 printf ("found %d erase regions\n", num_erase_regions);
715#endif
716 sect_cnt = 0;
717 sector = base;
718 for (i = 0; i < num_erase_regions; i++) {
719 if (i > NUM_ERASE_REGIONS) {
720 printf ("%d erase regions found, only %d used\n", num_erase_regions, NUM_ERASE_REGIONS);
721 break;
722 }
723 tmp = flash_read_long (info, 0,
724 FLASH_OFFSET_ERASE_REGIONS);
725 erase_region_count = (tmp & 0xffff) + 1;
726 tmp >>= 16;
727 erase_region_size =
728 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
729 for (j = 0; j < erase_region_count; j++) {
730 info->start[sect_cnt] = sector;
731 sector += (erase_region_size * size_ratio);
732 info->protect[sect_cnt] =
733 flash_isset (info, sect_cnt,
734 FLASH_OFFSET_PROTECT,
735 FLASH_STATUS_PROTECT);
736 sect_cnt++;
737 }
738 }
739
740 info->sector_count = sect_cnt;
741
742 info->size =
743 (1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) *
744 size_ratio;
745 info->buffer_size =
746 (1 <<
747 flash_read_ushort (info, 0,
748 FLASH_OFFSET_BUFFER_SIZE));
749 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
750 info->erase_blk_tout =
751 (tmp *
752 (1 <<
753 flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
754 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT);
755 info->buffer_write_tout =
756 (tmp *
757 (1 <<
758 flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT)));
759 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT);
760 info->write_tout =
761 (tmp *
762 (1 <<
763 flash_read_uchar (info,
764 FLASH_OFFSET_WMAX_TOUT))) / 1000;
765 info->flash_id = FLASH_MAN_CFI;
766 }
767
768 flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
769 return (info->size);
770}
771
772
773
774static int flash_write_cfiword (flash_info_t * info, ulong dest,
775 cfiword_t cword)
776{
777
778 cfiptr_t ctladdr;
779 cfiptr_t cptr;
780 int flag;
781
782 ctladdr.cp = flash_make_addr (info, 0, 0);
783 cptr.cp = (uchar *) dest;
784
785
786 switch (info->portwidth) {
787 case FLASH_CFI_8BIT:
788 flag = ((cptr.cp[0] & cword.c) == cword.c);
789 break;
790 case FLASH_CFI_16BIT:
791 flag = ((cptr.wp[0] & cword.w) == cword.w);
792 break;
793 case FLASH_CFI_32BIT:
794 flag = ((cptr.lp[0] & cword.l) == cword.l);
795 break;
796 default:
797 return 2;
798 }
799 if (!flag)
800 return 2;
801
802
803 flag = disable_interrupts ();
804
805 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
806 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
807
808 switch (info->portwidth) {
809 case FLASH_CFI_8BIT:
810 cptr.cp[0] = cword.c;
811 break;
812 case FLASH_CFI_16BIT:
813 cptr.wp[0] = cword.w;
814 break;
815 case FLASH_CFI_32BIT:
816 cptr.lp[0] = cword.l;
817 break;
818 }
819
820
821 if (flag)
822 enable_interrupts ();
823
824 return flash_full_status_check (info, 0, info->write_tout, "write");
825}
826
827#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
828
829
830
831
832
833static int find_sector (flash_info_t * info, ulong addr)
834{
835 int sector;
836
837 for (sector = info->sector_count - 1; sector >= 0; sector--) {
838 if (addr >= info->start[sector])
839 break;
840 }
841 return sector;
842}
843
844static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
845 int len)
846{
847
848 int sector;
849 int cnt;
850 int retcode;
851 volatile cfiptr_t src;
852 volatile cfiptr_t dst;
853
854 src.cp = cp;
855 dst.cp = (uchar *) dest;
856 sector = find_sector (info, dest);
857 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
858 flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
859 if ((retcode =
860 flash_status_check (info, sector, info->buffer_write_tout,
861 "write to buffer")) == ERR_OK) {
862 switch (info->portwidth) {
863 case FLASH_CFI_8BIT:
864 cnt = len;
865 break;
866 case FLASH_CFI_16BIT:
867 cnt = len >> 1;
868 break;
869 case FLASH_CFI_32BIT:
870 cnt = len >> 2;
871 break;
872 default:
873 return ERR_INVAL;
874 break;
875 }
876 flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
877 while (cnt-- > 0) {
878 switch (info->portwidth) {
879 case FLASH_CFI_8BIT:
880 *dst.cp++ = *src.cp++;
881 break;
882 case FLASH_CFI_16BIT:
883 *dst.wp++ = *src.wp++;
884 break;
885 case FLASH_CFI_32BIT:
886 *dst.lp++ = *src.lp++;
887 break;
888 default:
889 return ERR_INVAL;
890 break;
891 }
892 }
893 flash_write_cmd (info, sector, 0,
894 FLASH_CMD_WRITE_BUFFER_CONFIRM);
895 retcode =
896 flash_full_status_check (info, sector,
897 info->buffer_write_tout,
898 "buffer write");
899 }
900 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
901 return retcode;
902}
903#endif
904
