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24#include <common.h>
25#include <mpc8260.h>
26#include <asm/processor.h>
27
28#undef DEBUG_FLASH
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47#define FLASH_CMD_CFI 0x98
48#define FLASH_CMD_READ_ID 0x90
49#define FLASH_CMD_RESET 0xff
50#define FLASH_CMD_BLOCK_ERASE 0x20
51#define FLASH_CMD_ERASE_CONFIRM 0xD0
52#define FLASH_CMD_WRITE 0x40
53#define FLASH_CMD_PROTECT 0x60
54#define FLASH_CMD_PROTECT_SET 0x01
55#define FLASH_CMD_PROTECT_CLEAR 0xD0
56#define FLASH_CMD_CLEAR_STATUS 0x50
57#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
58#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
59
60#define FLASH_STATUS_DONE 0x80
61#define FLASH_STATUS_ESS 0x40
62#define FLASH_STATUS_ECLBS 0x20
63#define FLASH_STATUS_PSLBS 0x10
64#define FLASH_STATUS_VPENS 0x08
65#define FLASH_STATUS_PSS 0x04
66#define FLASH_STATUS_DPS 0x02
67#define FLASH_STATUS_R 0x01
68#define FLASH_STATUS_PROTECT 0x01
69
70#define FLASH_OFFSET_CFI 0x55
71#define FLASH_OFFSET_CFI_RESP 0x10
72#define FLASH_OFFSET_WTOUT 0x1F
73#define FLASH_OFFSET_WBTOUT 0x20
74#define FLASH_OFFSET_ETOUT 0x21
75#define FLASH_OFFSET_CETOUT 0x22
76#define FLASH_OFFSET_WMAX_TOUT 0x23
77#define FLASH_OFFSET_WBMAX_TOUT 0x24
78#define FLASH_OFFSET_EMAX_TOUT 0x25
79#define FLASH_OFFSET_CEMAX_TOUT 0x26
80#define FLASH_OFFSET_SIZE 0x27
81#define FLASH_OFFSET_INTERFACE 0x28
82#define FLASH_OFFSET_BUFFER_SIZE 0x2A
83#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
84#define FLASH_OFFSET_ERASE_REGIONS 0x2D
85#define FLASH_OFFSET_PROTECT 0x02
86#define FLASH_OFFSET_USER_PROTECTION 0x85
87#define FLASH_OFFSET_INTEL_PROTECTION 0x81
88
89
90#define FLASH_MAN_CFI 0x01000000
91
92
93typedef union {
94 unsigned char c;
95 unsigned short w;
96 unsigned long l;
97} cfiword_t;
98
99typedef union {
100 unsigned char * cp;
101 unsigned short *wp;
102 unsigned long *lp;
103} cfiptr_t;
104
105#define NUM_ERASE_REGIONS 4
106
107flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
108
109
110
111
112
113
114
115static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c);
116static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf);
117static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd);
118static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd);
119static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd);
120static int flash_detect_cfi(flash_info_t * info);
121static ulong flash_get_size (ulong base, int banknum);
122static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword);
123static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt);
124#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
125static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len);
126#endif
127
128
129
130inline uchar * flash_make_addr(flash_info_t * info, int sect, int offset)
131{
132 return ((uchar *)(info->start[sect] + (offset * info->portwidth)));
133}
134
135
136
137inline uchar flash_read_uchar(flash_info_t * info, uchar offset)
138{
139 uchar *cp;
140 cp = flash_make_addr(info, 0, offset);
141 return (cp[info->portwidth - 1]);
142}
143
144
145
146
147ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset)
148{
149 uchar * addr;
150
151 addr = flash_make_addr(info, sect, offset);
152 return ((addr[(2*info->portwidth) - 1] << 8) | addr[info->portwidth - 1]);
153
154}
155
156
157
158
159
160ulong flash_read_long(flash_info_t * info, int sect, uchar offset)
161{
162 uchar * addr;
163
164 addr = flash_make_addr(info, sect, offset);
165 return ( (addr[(2*info->portwidth) - 1] << 24 ) | (addr[(info->portwidth) -1] << 16) |
166 (addr[(4*info->portwidth) - 1] << 8) | addr[(3*info->portwidth) - 1]);
167
168}
169
170
171
172unsigned long flash_init (void)
173{
174 unsigned long size;
175 int i;
176 unsigned long address;
177
178
179
180
181
182
183
184 address = CONFIG_SYS_FLASH_BASE;
185 size = 0;
186
187
188
189 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
190 flash_info[i].flash_id = FLASH_UNKNOWN;
191 size += flash_info[i].size = flash_get_size(address, i);
192 address += CONFIG_SYS_FLASH_INCREMENT;
193 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
194 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i,
195 flash_info[0].size, flash_info[i].size<<20);
196 }
197 }
198
199
200#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
201 for(i=0; flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1; i++)
202 (void)flash_real_protect(&flash_info[0], i, 1);
203#endif
204
205 return (size);
206}
207
208
209
210int flash_erase (flash_info_t *info, int s_first, int s_last)
211{
212 int rcode = 0;
213 int prot;
214 int sect;
215
216 if( info->flash_id != FLASH_MAN_CFI) {
217 printf ("Can't erase unknown flash type - aborted\n");
218 return 1;
219 }
220 if ((s_first < 0) || (s_first > s_last)) {
221 printf ("- no sectors to erase\n");
222 return 1;
223 }
224
225 prot = 0;
226 for (sect=s_first; sect<=s_last; ++sect) {
227 if (info->protect[sect]) {
228 prot++;
229 }
230 }
231 if (prot) {
232 printf ("- Warning: %d protected sectors will not be erased!\n",
233 prot);
234 } else {
235 printf ("\n");
236 }
237
238
239 for (sect = s_first; sect<=s_last; sect++) {
240 if (info->protect[sect] == 0) {
241 flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS);
242 flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE);
243 flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
244
245 if(flash_full_status_check(info, sect, info->erase_blk_tout, "erase")) {
246 rcode = 1;
247 } else
248 printf(".");
249 }
250 }
251 printf (" done\n");
252 return rcode;
253}
254
255
256
257void flash_print_info (flash_info_t *info)
258{
259 int i;
260
261 if (info->flash_id != FLASH_MAN_CFI) {
262 printf ("missing or unknown FLASH type\n");
263 return;
264 }
265
266 printf("CFI conformant FLASH (%d x %d)",
267 (info->portwidth << 3 ), (info->chipwidth << 3 ));
268 printf (" Size: %ld MB in %d Sectors\n",
269 info->size >> 20, info->sector_count);
270 printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
271 info->erase_blk_tout, info->write_tout, info->buffer_write_tout, info->buffer_size);
272
273 printf (" Sector Start Addresses:");
274 for (i=0; i<info->sector_count; ++i) {
275 if ((i % 5) == 0)
276 printf ("\n");
277 printf (" %08lX%5s",
278 info->start[i],
279 info->protect[i] ? " (RO)" : " "
280 );
281 }
282 printf ("\n");
283 return;
284}
285
286
287
288
289
290
291
292int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
293{
294 ulong wp;
295 ulong cp;
296 int aln;
297 cfiword_t cword;
298 int i, rc;
299
300
301 wp = (addr & ~(info->portwidth - 1));
302
303
304 if((aln = addr - wp) != 0) {
305 cword.l = 0;
306 cp = wp;
307 for(i=0;i<aln; ++i, ++cp)
308 flash_add_byte(info, &cword, (*(uchar *)cp));
309
310 for(; (i< info->portwidth) && (cnt > 0) ; i++) {
311 flash_add_byte(info, &cword, *src++);
312 cnt--;
313 cp++;
314 }
315 for(; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
316 flash_add_byte(info, &cword, (*(uchar *)cp));
317 if((rc = flash_write_cfiword(info, wp, cword)) != 0)
318 return rc;
319 wp = cp;
320 }
321
322#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
323 while(cnt >= info->portwidth) {
324 i = info->buffer_size > cnt? cnt: info->buffer_size;
325 if((rc = flash_write_cfibuffer(info, wp, src,i)) != ERR_OK)
326 return rc;
327 wp += i;
328 src += i;
329 cnt -=i;
330 }
331#else
332
333 while(cnt >= info->portwidth) {
334 cword.l = 0;
335 for(i = 0; i < info->portwidth; i++) {
336 flash_add_byte(info, &cword, *src++);
337 }
338 if((rc = flash_write_cfiword(info, wp, cword)) != 0)
339 return rc;
340 wp += info->portwidth;
341 cnt -= info->portwidth;
342 }
343#endif
344 if (cnt == 0) {
345 return (0);
346 }
347
348
349
350
351 cword.l = 0;
352 for (i=0, cp=wp; (i<info->portwidth) && (cnt>0); ++i, ++cp) {
353 flash_add_byte(info, &cword, *src++);
354 --cnt;
355 }
356 for (; i<info->portwidth; ++i, ++cp) {
357 flash_add_byte(info, & cword, (*(uchar *)cp));
358 }
359
360 return flash_write_cfiword(info, wp, cword);
361}
362
363
364
365int flash_real_protect(flash_info_t *info, long sector, int prot)
366{
367 int retcode = 0;
368
369 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
370 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
371 if(prot)
372 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET);
373 else
374 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
375
376 if((retcode = flash_full_status_check(info, sector, info->erase_blk_tout,
377 prot?"protect":"unprotect")) == 0) {
378
379 info->protect[sector] = prot;
380
381 if(prot == 0) {
382 int i;
383 for(i = 0 ; i<info->sector_count; i++) {
384 if(info->protect[i])
385 flash_real_protect(info, i, 1);
386 }
387 }
388 }
389
390 return retcode;
391}
392
393
394
395
396static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
397{
398 ulong start;
399
400
401 start = get_timer (0);
402 while(!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) {
403 if (get_timer(start) > info->erase_blk_tout) {
404 printf("Flash %s timeout at address %lx\n", prompt, info->start[sector]);
405 flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
406 return ERR_TIMOUT;
407 }
408 }
409 return ERR_OK;
410}
411
412
413
414
415static int flash_full_status_check(flash_info_t * info, ulong sector, ulong tout, char * prompt)
416{
417 int retcode;
418 retcode = flash_status_check(info, sector, tout, prompt);
419 if((retcode == ERR_OK) && !flash_isequal(info,sector, 0, FLASH_STATUS_DONE)) {
420 retcode = ERR_INVAL;
421 printf("Flash %s error at address %lx\n", prompt,info->start[sector]);
422 if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)){
423 printf("Command Sequence Error.\n");
424 } else if(flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)){
425 printf("Block Erase Error.\n");
426 retcode = ERR_NOT_ERASED;
427 } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) {
428 printf("Locking Error\n");
429 }
430 if(flash_isset(info, sector, 0, FLASH_STATUS_DPS)){
431 printf("Block locked.\n");
432 retcode = ERR_PROTECTED;
433 }
434 if(flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
435 printf("Vpp Low Error.\n");
436 }
437 flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
438 return retcode;
439}
440
441
442static void flash_add_byte(flash_info_t *info, cfiword_t * cword, uchar c)
443{
444 switch(info->portwidth) {
445 case FLASH_CFI_8BIT:
446 cword->c = c;
447 break;
448 case FLASH_CFI_16BIT:
449 cword->w = (cword->w << 8) | c;
450 break;
451 case FLASH_CFI_32BIT:
452 cword->l = (cword->l << 8) | c;
453 }
454}
455
456
457
458
459
460static void flash_make_cmd(flash_info_t * info, uchar cmd, void * cmdbuf)
461{
462 int i;
463 uchar *cp = (uchar *)cmdbuf;
464 for(i=0; i< info->portwidth; i++)
465 *cp++ = ((i+1) % info->chipwidth) ? '\0':cmd;
466}
467
468
469
470
471static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, uchar cmd)
472{
473
474 volatile cfiptr_t addr;
475 cfiword_t cword;
476 addr.cp = flash_make_addr(info, sect, offset);
477 flash_make_cmd(info, cmd, &cword);
478 switch(info->portwidth) {
479 case FLASH_CFI_8BIT:
480 *addr.cp = cword.c;
481 break;
482 case FLASH_CFI_16BIT:
483 *addr.wp = cword.w;
484 break;
485 case FLASH_CFI_32BIT:
486 *addr.lp = cword.l;
487 break;
488 }
489}
490
491
492
493static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd)
494{
495 cfiptr_t cptr;
496 cfiword_t cword;
497 int retval;
498 cptr.cp = flash_make_addr(info, sect, offset);
499 flash_make_cmd(info, cmd, &cword);
500 switch(info->portwidth) {
501 case FLASH_CFI_8BIT:
502 retval = (cptr.cp[0] == cword.c);
503 break;
504 case FLASH_CFI_16BIT:
505 retval = (cptr.wp[0] == cword.w);
506 break;
507 case FLASH_CFI_32BIT:
508 retval = (cptr.lp[0] == cword.l);
509 break;
510 default:
511 retval = 0;
512 break;
513 }
514 return retval;
515}
516
517
518static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd)
519{
520 cfiptr_t cptr;
521 cfiword_t cword;
522 int retval;
523 cptr.cp = flash_make_addr(info, sect, offset);
524 flash_make_cmd(info, cmd, &cword);
525 switch(info->portwidth) {
526 case FLASH_CFI_8BIT:
527 retval = ((cptr.cp[0] & cword.c) == cword.c);
528 break;
529 case FLASH_CFI_16BIT:
530 retval = ((cptr.wp[0] & cword.w) == cword.w);
531 break;
532 case FLASH_CFI_32BIT:
533 retval = ((cptr.lp[0] & cword.l) == cword.l);
534 break;
535 default:
536 retval = 0;
537 break;
538 }
539 return retval;
540}
541
542
543
544
545
546
547static int flash_detect_cfi(flash_info_t * info)
548{
549
550 for(info->portwidth=FLASH_CFI_8BIT; info->portwidth <= FLASH_CFI_32BIT;
551 info->portwidth <<= 1) {
552 for(info->chipwidth =FLASH_CFI_BY8;
553 info->chipwidth <= info->portwidth;
554 info->chipwidth <<= 1) {
555 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
556 flash_write_cmd(info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
557 if(flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP,'Q') &&
558 flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
559 flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y'))
560 return 1;
561 }
562 }
563 return 0;
564}
565
566
567
568
569static ulong flash_get_size (ulong base, int banknum)
570{
571 flash_info_t * info = &flash_info[banknum];
572 int i, j;
573 int sect_cnt;
574 unsigned long sector;
575 unsigned long tmp;
576 int size_ratio;
577 uchar num_erase_regions;
578 int erase_region_size;
579 int erase_region_count;
580
581 info->start[0] = base;
582
583 if(flash_detect_cfi(info)){
584 size_ratio = info->portwidth / info->chipwidth;
585 num_erase_regions = flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS);
586#ifdef DEBUG_FLASH
587 printf("found %d erase regions\n", num_erase_regions);
588#endif
589 sect_cnt = 0;
590 sector = base;
591 for(i = 0 ; i < num_erase_regions; i++) {
592 if(i > NUM_ERASE_REGIONS) {
593 printf("%d erase regions found, only %d used\n",
594 num_erase_regions, NUM_ERASE_REGIONS);
595 break;
596 }
597 tmp = flash_read_long(info, 0, FLASH_OFFSET_ERASE_REGIONS);
598 erase_region_size = (tmp & 0xffff)? ((tmp & 0xffff) * 256): 128;
599 tmp >>= 16;
600 erase_region_count = (tmp & 0xffff) +1;
601 for(j = 0; j< erase_region_count; j++) {
602 info->start[sect_cnt] = sector;
603 sector += (erase_region_size * size_ratio);
604 info->protect[sect_cnt] = flash_isset(info, sect_cnt, FLASH_OFFSET_PROTECT, FLASH_STATUS_PROTECT);
605 sect_cnt++;
606 }
607 }
608
609 info->sector_count = sect_cnt;
610
611 info->size = (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * size_ratio;
612 info->buffer_size = (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE));
613 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT);
614 info->erase_blk_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT)));
615 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT);
616 info->buffer_write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT)));
617 tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT);
618 info->write_tout = (tmp * (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT)))/ 1000;
619 info->flash_id = FLASH_MAN_CFI;
620 }
621
622 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
623 return(info->size);
624}
625
626
627
628
629static int flash_write_cfiword (flash_info_t *info, ulong dest, cfiword_t cword)
630{
631
632 cfiptr_t ctladdr;
633 cfiptr_t cptr;
634 int flag;
635
636 ctladdr.cp = flash_make_addr(info, 0, 0);
637 cptr.cp = (uchar *)dest;
638
639
640
641 switch(info->portwidth) {
642 case FLASH_CFI_8BIT:
643 flag = ((cptr.cp[0] & cword.c) == cword.c);
644 break;
645 case FLASH_CFI_16BIT:
646 flag = ((cptr.wp[0] & cword.w) == cword.w);
647 break;
648 case FLASH_CFI_32BIT:
649 flag = ((cptr.lp[0] & cword.l) == cword.l);
650 break;
651 default:
652 return 2;
653 }
654 if(!flag)
655 return 2;
656
657
658 flag = disable_interrupts();
659
660 flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS);
661 flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE);
662
663 switch(info->portwidth) {
664 case FLASH_CFI_8BIT:
665 cptr.cp[0] = cword.c;
666 break;
667 case FLASH_CFI_16BIT:
668 cptr.wp[0] = cword.w;
669 break;
670 case FLASH_CFI_32BIT:
671 cptr.lp[0] = cword.l;
672 break;
673 }
674
675
676 if(flag)
677 enable_interrupts();
678
679 return flash_full_status_check(info, 0, info->write_tout, "write");
680}
681
682#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
683
684
685
686
687
688static int find_sector(flash_info_t *info, ulong addr)
689{
690 int sector;
691 for(sector = info->sector_count - 1; sector >= 0; sector--) {
692 if(addr >= info->start[sector])
693 break;
694 }
695 return sector;
696}
697
698static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, int len)
699{
700
701 int sector;
702 int cnt;
703 int retcode;
704 volatile cfiptr_t src;
705 volatile cfiptr_t dst;
706
707 src.cp = cp;
708 dst.cp = (uchar *)dest;
709 sector = find_sector(info, dest);
710 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
711 flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
712 if((retcode = flash_status_check(info, sector, info->buffer_write_tout,
713 "write to buffer")) == ERR_OK) {
714 switch(info->portwidth) {
715 case FLASH_CFI_8BIT:
716 cnt = len;
717 break;
718 case FLASH_CFI_16BIT:
719 cnt = len >> 1;
720 break;
721 case FLASH_CFI_32BIT:
722 cnt = len >> 2;
723 break;
724 default:
725 return ERR_INVAL;
726 break;
727 }
728 flash_write_cmd(info, sector, 0, (uchar)cnt-1);
729 while(cnt-- > 0) {
730 switch(info->portwidth) {
731 case FLASH_CFI_8BIT:
732 *dst.cp++ = *src.cp++;
733 break;
734 case FLASH_CFI_16BIT:
735 *dst.wp++ = *src.wp++;
736 break;
737 case FLASH_CFI_32BIT:
738 *dst.lp++ = *src.lp++;
739 break;
740 default:
741 return ERR_INVAL;
742 break;
743 }
744 }
745 flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM);
746 retcode = flash_full_status_check(info, sector, info->buffer_write_tout,
747 "buffer write");
748 }
749 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
750 return retcode;
751}
752#endif
753
