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wdenk217c9da2002-10-25 20:35:49 +00001/*
2 * (C) Copyright 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <mpc8xx.h>
26#include <flash.h>
27
28flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
29
30/*-----------------------------------------------------------------------
31 * Functions
32 */
33ulong flash_recognize (vu_long *base);
34int write_word (flash_info_t *info, ulong dest, ulong data);
35void flash_get_geometry (vu_long *base, flash_info_t *info);
36void flash_unprotect(flash_info_t *info);
37int _flash_real_protect(flash_info_t *info, long idx, int on);
38
39
40unsigned long flash_init (void)
41{
42 volatile immap_t *immap = (immap_t *)CFG_IMMR;
43 volatile memctl8xx_t *memctl = &immap->im_memctl;
44 int i;
45 int rec;
46
47 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
48 flash_info[i].flash_id = FLASH_UNKNOWN;
49 }
50
51 *((vu_short*)CFG_FLASH_BASE) = 0xffff;
52
53 flash_get_geometry ((vu_long*)CFG_FLASH_BASE, &flash_info[0]);
54
55 /* Remap FLASH according to real size */
56 memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-flash_info[0].size & 0xFFFF8000);
57 memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) |
58 (memctl->memc_br0 & ~(BR_BA_MSK));
59
60 rec = flash_recognize((vu_long*)CFG_FLASH_BASE);
61
62 if (rec == FLASH_UNKNOWN) {
63 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
64 flash_info[0].size, flash_info[0].size<<20);
65 }
66
67#if CFG_FLASH_PROTECTION
68 /*Unprotect all the flash memory*/
69 flash_unprotect(&flash_info[0]);
70#endif
71
72 *((vu_short*)CFG_FLASH_BASE) = 0xffff;
73
74 return (flash_info[0].size);
75
76#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
77 /* monitor protection ON by default */
78 flash_protect(FLAG_PROTECT_SET,
79 CFG_MONITOR_BASE,
wdenk3b57fe02003-05-30 12:48:29 +000080 CFG_MONITOR_BASE+monitor_flash_len-1,
wdenk217c9da2002-10-25 20:35:49 +000081 &flash_info[0]);
82#endif
83
84#ifdef CFG_ENV_IS_IN_FLASH
85 /* ENV protection ON by default */
86 flash_protect(FLAG_PROTECT_SET,
87 CFG_ENV_OFFSET,
88 CFG_ENV_OFFSET+CFG_ENV_SIZE-1,
89 &flash_info[0]);
90#endif
91 return (flash_info[0].size);
92}
93
94
95int flash_get_protect_status(flash_info_t * info, long idx)
96{
97 vu_short * base;
98 ushort res;
99
100#ifdef DEBUG
101 printf("\n Attempting to set protection info with %d sectors\n", info->sector_count);
102#endif
103
104
105 base = (vu_short*)info->start[idx];
106
107 *(base) = 0xffff;
108
109 *(base + 0x55) = 0x0098;
110 res = base[0x2];
111
112 *(base) = 0xffff;
113
114 if(res != 0)
115 res = 1;
116 else
117 res = 0;
118
119 return res;
120}
121
122void flash_get_geometry (vu_long *base, flash_info_t *info)
123{
124 int i,j;
125 ulong ner = 0;
126 vu_short * sb = (vu_short*)base;
127 ulong offset = (ulong)base;
128
129 /* Read Device geometry */
130
131 *sb = 0xffff;
132
133 *sb = 0x0090;
134
135 info->flash_id = ((ulong)base[0x0]);
136#ifdef DEBUG
137 printf("Id is %x\n", (uint)(ulong)info->flash_id);
138#endif
139
140 *sb = 0xffff;
141
142 *(sb+0x55) = 0x0098;
143
144 info->size = 1 << (sb[0x27]); /* Read flash size */
145
146#ifdef DEBUG
147 printf("Size is %x\n", (uint)(ulong)info->size);
148#endif
149
150 *sb = 0xffff;
151
152 *(sb + 0x55) = 0x0098;
153 ner = sb[0x2c] ; /*Number of erase regions*/
154
155#ifdef DEBUG
156 printf("Number of erase regions %x\n", (uint)ner);
157#endif
158
159 info->sector_count = 0;
160
161 for(i = 0; i < ner; i++)
162 {
163 uint s;
164 uint count;
165 uint t1,t2,t3,t4;
166
167 *sb = 0xffff;
168
169 *(sb + 0x55) = 0x0098;
170
171 t1 = sb[0x2d + i*4];
172 t2 = sb[0x2e + i*4];
173 t3 = sb[0x2f + i*4];
174 t4 = sb[0x30 + i*4];
175
176 count = ((t1 & 0x00ff) | (((t2 & 0x00ff) << 8) & 0xff00) )+ 1; /*sector count*/
177 s = ((t3 & 0x00ff) | (((t4 & 0x00ff) << 8) & 0xff00)) * 256;; /*Sector size*/
178
179#ifdef DEBUG
180 printf("count and size %x, %x\n", count, s);
181 printf("sector count for erase region %d is %d\n", i, count);
182#endif
183 for(j = 0; j < count; j++)
184 {
185#ifdef DEBUG
186 printf("%x, ", (uint)offset);
187#endif
188 info->start[ info->sector_count + j] = offset;
189 offset += s;
190 }
191 info->sector_count += count;
192 }
193
194 if ((offset - (ulong)base) != info->size)
195 printf("WARNING reported size %x does not match to calculted size %x.\n"
196 , (uint)info->size, (uint)(offset - (ulong)base) );
197
198 /* Next check if there are any sectors protected.*/
199
200 for(i = 0; i < info->sector_count; i++)
201 info->protect[i] = flash_get_protect_status(info, i);
202
203 *sb = 0xffff;
204}
205
206/*-----------------------------------------------------------------------
207 */
208void flash_print_info (flash_info_t *info)
209{
210 int i;
211
212 if (info->flash_id == FLASH_UNKNOWN) {
213 printf ("missing or unknown FLASH type\n");
214 return ;
215 }
216
217 switch (info->flash_id & FLASH_VENDMASK) {
218 case INTEL_MANUFACT & FLASH_VENDMASK:
219 printf ("Intel ");
220 break;
221 default:
222 printf ("Unknown Vendor ");
223 break;
224 }
225
226 switch (info->flash_id & FLASH_TYPEMASK) {
227 case INTEL_ID_28F320C3B & FLASH_TYPEMASK:
228 printf ("28F320RC3(4 MB)\n");
229 break;
230 case INTEL_ID_28F320J3A:
231 printf("28F320J3A (4 MB)\n");
232 break;
233 default:
234 printf ("Unknown Chip Type\n");
235 break;
236 }
237
238 printf (" Size: %ld MB in %d Sectors\n",
239 info->size >> 20, info->sector_count);
240
241 printf (" Sector Start Addresses:");
242 for (i=0; i<info->sector_count; ++i) {
243 if ((i % 4) == 0)
244 printf ("\n ");
245 printf (" %02d %08lX%s",
246 i, info->start[i],
247 info->protect[i]!=0 ? " (RO)" : " "
248 );
249 }
250 printf ("\n");
251 return ;
252}
253
254ulong flash_recognize (vu_long *base)
255{
256 ulong id;
257 ulong res = FLASH_UNKNOWN;
258 vu_short * sb = (vu_short*)base;
259
260 *sb = 0xffff;
261
262 *sb = 0x0090;
263 id = base[0];
264
265 switch (id & 0x00FF0000)
266 {
267 case (MT_MANUFACT & 0x00FF0000): /* MT or => Intel */
268 case (INTEL_ALT_MANU & 0x00FF0000):
269 res = FLASH_MAN_INTEL;
270 break;
271 default:
272 res = FLASH_UNKNOWN;
273 }
274
275 *sb = 0xffff;
276
277 return res;
278}
279
280/*-----------------------------------------------------------------------*/
281#define INTEL_FLASH_STATUS_BLS 0x02
282#define INTEL_FLASH_STATUS_PSS 0x04
283#define INTEL_FLASH_STATUS_VPPS 0x08
284#define INTEL_FLASH_STATUS_PS 0x10
285#define INTEL_FLASH_STATUS_ES 0x20
286#define INTEL_FLASH_STATUS_ESS 0x40
287#define INTEL_FLASH_STATUS_WSMS 0x80
288
289int flash_decode_status_bits(char status)
290{
291 int err = 0;
292
293 if(!(status & INTEL_FLASH_STATUS_WSMS)) {
294 printf("Busy\n");
295 err = -1;
296 }
297
298 if(status & INTEL_FLASH_STATUS_ESS) {
299 printf("Erase suspended\n");
300 err = -1;
301 }
302
303 if(status & INTEL_FLASH_STATUS_ES) {
304 printf("Error in block erase\n");
305 err = -1;
306 }
307
308 if(status & INTEL_FLASH_STATUS_PS) {
309 printf("Error in programming\n");
310 err = -1;
311 }
312
313 if(status & INTEL_FLASH_STATUS_VPPS) {
314 printf("Vpp low, operation aborted\n");
315 err = -1;
316 }
317
318 if(status & INTEL_FLASH_STATUS_PSS) {
319 printf("Program is suspended\n");
320 err = -1;
321 }
322
323 if(status & INTEL_FLASH_STATUS_BLS) {
324 printf("Attempting to program/erase a locked sector\n");
325 err = -1;
326 }
327
328 if((status & INTEL_FLASH_STATUS_PS) &&
329 (status & INTEL_FLASH_STATUS_ES) &&
330 (status & INTEL_FLASH_STATUS_ESS)) {
331 printf("A command sequence error\n");
332 return -1;
333 }
334
335 return err;
336}
337
338/*-----------------------------------------------------------------------
339 */
340
341int flash_erase (flash_info_t *info, int s_first, int s_last)
342{
343 vu_short *addr;
344 int flag, prot, sect;
345 ulong start, now;
346 int rcode = 0;
347
348 if ((s_first < 0) || (s_first > s_last)) {
349 if (info->flash_id == FLASH_UNKNOWN) {
350 printf ("- missing\n");
351 } else {
352 printf ("- no sectors to erase\n");
353 }
354 return 1;
355 }
356
357 if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
358 printf ("Can't erase unknown flash type %08lx - aborted\n",
359 info->flash_id);
360 return 1;
361 }
362
363 prot = 0;
364 for (sect=s_first; sect<=s_last; ++sect) {
365 if (info->protect[sect]) {
366 prot++;
367 }
368 }
369
370 if (prot) {
371 printf ("- Warning: %d protected sectors will not be erased!\n",
372 prot);
373 } else {
374 printf ("\n");
375 }
376
377 start = get_timer (0);
378
379 /* Start erase on unprotected sectors */
380 for (sect = s_first; sect<=s_last; sect++) {
381 char tmp;
382
383 if (info->protect[sect] == 0) { /* not protected */
384 addr = (vu_short *)(info->start[sect]);
385
386 /* Disable interrupts which might cause a timeout here */
387 flag = disable_interrupts();
388
389 /* Single Block Erase Command */
390 *addr = 0x0020;
391 /* Confirm */
392 *addr = 0x00D0;
393 /* Resume Command, as per errata update */
394 *addr = 0x00D0;
395
396 /* re-enable interrupts if necessary */
397 if (flag)
398 enable_interrupts();
399
400 *addr = 0x70; /*Read status register command*/
401 tmp = (short)*addr & 0x00FF; /* Read the status */
402 while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
403 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
404 *addr = 0x0050; /* Reset the status register */
405 *addr = 0xffff;
406 printf ("Timeout\n");
407 return 1;
408 }
409 /* show that we're waiting */
410 if ((now - start) > 1000) { /* every second */
411 putc ('.');
412 }
413 udelay(100000); /* 100 ms */
414 *addr = 0x0070; /*Read status register command*/
415 tmp = (short)*addr & 0x00FF; /* Read status */
416 start = get_timer(0);
417 }
418 if( tmp & INTEL_FLASH_STATUS_ES )
419 flash_decode_status_bits(tmp);
420
421 *addr = 0x0050; /* Reset the status register */
422 *addr = 0xffff; /* Reset to read mode */
423 }
424 }
425
426
427 printf (" done\n");
428 return rcode;
429}
430
431void flash_unprotect (flash_info_t *info)
432{
433 /*We can only unprotect the whole flash at once*/
434 /*Therefore we must prevent the _flash_real_protect()*/
435 /*from re-protecting sectors, that ware protected before */
436 /*we called flash_real_protect();*/
437
438 int i;
439
440 for(i = 0; i < info->sector_count; i++)
441 info->protect[i] = 0;
442
443#ifdef CFG_FLASH_PROTECTION
444 _flash_real_protect(info, 0, 0);
445#endif
446}
447
448/*-----------------------------------------------------------------------
449 * Copy memory to flash, returns:
450 * 0 - OK
451 * 1 - write timeout
452 * 2 - Flash not erased
453 */
454
455int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
456{
457 ulong cp, wp, data;
458 int i, l, rc;
459
460 wp = (addr & ~3); /* get lower word aligned address */
461
462 /*
463 * handle unaligned start bytes
464 */
465 if ((l = addr - wp) != 0) {
466 data = 0;
467 for (i=0, cp=wp; i<l; ++i, ++cp) {
468 data = (data << 8) | (*(uchar *)cp);
469 }
470 for (; i<4 && cnt>0; ++i) {
471 data = (data << 8) | *src++;
472 --cnt;
473 ++cp;
474 }
475 for (; cnt==0 && i<4; ++i, ++cp) {
476 data = (data << 8) | (*(uchar *)cp);
477 }
478
479 if ((rc = write_word(info, wp, data)) != 0) {
480 return (rc);
481 }
482 wp += 4;
483 }
484
485 /*
486 * handle word aligned part
487 */
488 while (cnt >= 4) {
489 data = 0;
490 for (i=0; i<4; ++i) {
491 data = (data << 8) | *src++;
492 }
493 if ((rc = write_word(info, wp, data)) != 0) {
494 return (rc);
495 }
496 wp += 4;
497 cnt -= 4;
498 }
499
500 if (cnt == 0) {
501 return (0);
502 }
503
504 /*
505 * handle unaligned tail bytes
506 */
507 data = 0;
508 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
509 data = (data << 8) | *src++;
510 --cnt;
511 }
512 for (; i<4; ++i, ++cp) {
513 data = (data << 8) | (*(uchar *)cp);
514 }
515
516 return (write_word(info, wp, data));
517}
518
519/*-----------------------------------------------------------------------
520 * Write a word to Flash, returns:
521 * 0 - OK
522 * 1 - write timeout
523 * 2 - Flash not erased
524 */
525int write_word (flash_info_t *info, ulong dest, ulong da)
526{
527 vu_short *addr = (vu_short *)dest;
528 ulong start;
529 char csr;
530 int flag;
531 ushort * d = (ushort*)&da;
532 int i;
533
534 /* Check if Flash is (sufficiently) erased */
535 if (((*addr & d[0]) != d[0]) || ((*(addr+1) & d[1]) != d[1])) {
536 return (2);
537 }
538 /* Disable interrupts which might cause a timeout here */
539 flag = disable_interrupts();
540
541 for(i = 0; i < 2; i++)
542 {
543 /* Write Command */
544 *addr = 0x0010;
545
546 /* Write Data */
547 *addr = d[i];
548
549 /* re-enable interrupts if necessary */
550 if (flag)
551 enable_interrupts();
552
553 /* data polling for D7 */
554 start = get_timer (0);
555 flag = 0;
556 *addr = 0x0070; /*Read statusregister command */
557 while (((csr = *addr) & INTEL_FLASH_STATUS_WSMS)!=INTEL_FLASH_STATUS_WSMS) {
558 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
559 flag = 1;
560 break;
561 }
562 *addr = 0x0070; /*Read statusregister command */
563 }
564 if (csr & INTEL_FLASH_STATUS_PSS) {
565 printf ("CSR indicates write error (%0x) at %08lx\n",
566 csr, (ulong)addr);
567 flag = 1;
568 }
569
570 /* Clear Status Registers Command */
571 *addr = 0x0050;
572 /* Reset to read array mode */
573 *addr = 0xffff;
574 addr++;
575 }
576
577 return (flag);
578}
579
580int flash_real_protect(flash_info_t *info, long offset, int prot)
581{
582 int i, idx;
583
584 for(idx = 0; idx < info->sector_count; idx++)
585 if(info->start[idx] == offset)
586 break;
587
588 if(idx==info->sector_count)
589 return -1;
590
591 if(prot == 0) {
592 /* Unprotect one sector, which means unprotect all flash
593 * and reprotect the other protected sectors.
594 */
595 _flash_real_protect(info, 0, 0); /* Unprotects the whole flash*/
596 info->protect[idx] = 0;
597
598 for(i = 0; i < info->sector_count; i++)
599 if(info->protect[i])
600 _flash_real_protect(info, i, 1);
601 }
602 else {
603 /* We can protect individual sectors */
604 _flash_real_protect(info, idx, 1);
605 }
606
607 for( i = 0; i < info->sector_count; i++)
608 info->protect[i] = flash_get_protect_status(info, i);
609
610 return 0;
611}
612
613int _flash_real_protect(flash_info_t *info, long idx, int prot)
614{
615 vu_short *addr;
616 int flag;
617 ushort cmd;
618 ushort tmp;
619 ulong now, start;
620
621 if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
622 printf ("Can't change protection for unknown flash type %08lx - aborted\n",
623 info->flash_id);
624 return -1;
625 }
626
627 if(prot == 0) {
628 /*Unlock the sector*/
629 cmd = 0x00D0;
630 }
631 else {
632 /*Lock the sector*/
633 cmd = 0x0001;
634 }
635
636 addr = (vu_short *)(info->start[idx]);
637
638 /* If chip is busy, wait for it */
639 start = get_timer(0);
640 *addr = 0x0070; /*Read status register command*/
641 tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
642 while(!(tmp & INTEL_FLASH_STATUS_WSMS)) {
643 /*Write State Machine Busy*/
644 /*Wait untill done or timeout.*/
645 if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
646 *addr = 0x0050; /* Reset the status register */
647 *addr = 0xffff; /* Reset the chip */
648 printf ("TTimeout\n");
649 return 1;
650 }
651 *addr = 0x0070;
652 tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
653 start = get_timer(0);
654 }
655
656 /* Disable interrupts which might cause a timeout here */
657 flag = disable_interrupts();
658
659 /* Unlock block*/
660 *addr = 0x0060;
661
662 *addr = cmd;
663
664 /* re-enable interrupts if necessary */
665 if (flag)
666 enable_interrupts();
667
668 start = get_timer(0);
669 *addr = 0x0070; /*Read status register command*/
670 tmp = ((ushort)(*addr)) & 0x00FF; /* Read the status */
671 while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
672 /* Write State Machine Busy */
673 if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
674 *addr = 0x0050; /* Reset the status register */
675 *addr = 0xffff;
676 printf ("Timeout\n");
677 return 1;
678 }
679 /* show that we're waiting */
680 if ((now - start) > 1000) { /* every second */
681 putc ('.');
682 }
683 udelay(100000); /* 100 ms */
684 *addr = 0x70; /*Read status register command*/
685 tmp = (short)*addr & 0x00FF; /* Read status */
686 start = get_timer(0);
687 }
688 if( tmp & INTEL_FLASH_STATUS_PS )
689 flash_decode_status_bits(tmp);
690
691 *addr =0x0050; /*Clear status register*/
692
693 /* reset to read mode */
694 *addr = 0xffff;
695
696 return 0;
697}