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wdenkaffae2b2002-08-17 09:36:01 +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
27flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
28
29#if defined(CFG_ENV_IS_IN_FLASH)
30# ifndef CFG_ENV_ADDR
31# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
32# endif
33# ifndef CFG_ENV_SIZE
34# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
35# endif
36# ifndef CFG_ENV_SECT_SIZE
37# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
38# endif
39#endif
40
41/*-----------------------------------------------------------------------
42 * Functions
43 */
44static ulong flash_get_size (vu_long *addr, flash_info_t *info);
45static int write_word (flash_info_t *info, ulong dest, ulong data);
46static void flash_get_offsets (ulong base, flash_info_t *info);
47
48/*-----------------------------------------------------------------------
49 */
50
51unsigned long flash_init (void)
52{
53 volatile immap_t *immap = (immap_t *)CFG_IMMR;
54 volatile memctl8xx_t *memctl = &immap->im_memctl;
55 unsigned long size_b0, size_b1;
56 int i;
57
58 /* Init: no FLASHes known */
59 for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) {
60 flash_info[i].flash_id = FLASH_UNKNOWN;
61 }
62
63 /* Static FLASH Bank configuration here - FIXME XXX */
64
65 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
66
67 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
68 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
69 size_b0,
70 size_b0 >> 20);
71 }
72
73 if (FLASH_BASE1_PRELIM != 0x0) {
74 size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
75
76 if (size_b1 > size_b0) {
77 printf ("## ERROR: Bank 1 (0x%08lx = %ld MB)"
78 " > Bank 0 (0x%08lx = %ld MB)\n",
79 size_b1, size_b1 >> 20,
80 size_b0, size_b0 >> 20);
81
82 flash_info[0].flash_id = FLASH_UNKNOWN;
83 flash_info[1].flash_id = FLASH_UNKNOWN;
84 flash_info[0].sector_count = -1;
85 flash_info[1].sector_count = -1;
86 flash_info[0].size = 0;
87 flash_info[1].size = 0;
88 return (0);
89 }
90 } else {
91 size_b1 = 0;
92 }
93
94 /* Remap FLASH according to real size */
95 memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
96 memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
97
98 /* Re-do sizing to get full correct info */
99 size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
100
101 flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
102
103#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
104 /* monitor protection ON by default */
105 flash_protect(FLAG_PROTECT_SET,
106 CFG_MONITOR_BASE,
wdenk3b57fe02003-05-30 12:48:29 +0000107 CFG_MONITOR_BASE+monitor_flash_len-1,
wdenkaffae2b2002-08-17 09:36:01 +0000108 &flash_info[0]);
109#endif
110
111#ifdef CFG_ENV_IS_IN_FLASH
112 /* ENV protection ON by default */
113 flash_protect(FLAG_PROTECT_SET,
114 CFG_ENV_ADDR,
115 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
116 &flash_info[0]);
117#endif
118
119 /* ICU862 Board has only one Flash Bank */
120 flash_info[1].flash_id = FLASH_UNKNOWN;
121 flash_info[1].sector_count = -1;
122
123 flash_info[0].size = size_b0;
124 flash_info[1].size = size_b1;
125
126 return (size_b0 + size_b1);
127
128}
129
130/*-----------------------------------------------------------------------
131 */
132static void flash_get_offsets (ulong base, flash_info_t *info)
133{
134 int i;
135
136 /* set up sector start address table */
137 if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
138 ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM033C)) {
139 /* set sector offsets for uniform sector type */
140 for (i = 0; i < info->sector_count; i++) {
141 info->start[i] = base + (i * 0x00040000);
142 }
143 }
144}
145
146/*-----------------------------------------------------------------------
147 */
148void flash_print_info (flash_info_t *info)
149{
150 int i;
151
152 if (info->flash_id == FLASH_UNKNOWN) {
153 puts ("missing or unknown FLASH type\n");
154 return;
155 }
156
157 switch (info->flash_id & FLASH_VENDMASK) {
158 case FLASH_MAN_AMD: puts ("AMD "); break;
159 case FLASH_MAN_FUJ: puts ("FUJITSU "); break;
160 case FLASH_MAN_BM: puts ("BRIGHT MICRO "); break;
161 default: puts ("Unknown Vendor "); break;
162 }
163
164 switch (info->flash_id & FLASH_TYPEMASK) {
165 case FLASH_AM040: puts ("29F040/29LV040 (4 Mbit, uniform sectors)\n");
166 break;
167 case FLASH_AM400B: puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
168 break;
169 case FLASH_AM400T: puts ("AM29LV400T (4 Mbit, top boot sector)\n");
170 break;
171 case FLASH_AM800B: puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
172 break;
173 case FLASH_AM800T: puts ("AM29LV800T (8 Mbit, top boot sector)\n");
174 break;
175 case FLASH_AM160B: puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
176 break;
177 case FLASH_AM160T: puts ("AM29LV160T (16 Mbit, top boot sector)\n");
178 break;
179 case FLASH_AM320B: puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
180 break;
181 case FLASH_AM320T: puts ("AM29LV320T (32 Mbit, top boot sector)\n");
182 break;
183 case FLASH_AM033C: puts ("AM29LV033C (32 Mbit)\n");
184 break;
185 default: puts ("Unknown Chip Type\n");
186 break;
187 }
188
189 printf (" Size: %ld MB in %d Sectors\n",
190 info->size >> 20, info->sector_count);
191
192 puts (" Sector Start Addresses:");
193
194 for (i=0; i<info->sector_count; ++i) {
195 if ((i % 5) == 0) {
196 puts ("\n ");
197 }
198
199 printf (" %08lX%s",
200 info->start[i],
201 info->protect[i] ? " (RO)" : " "
202 );
203 }
204
205 puts ("\n");
206}
207
208/*-----------------------------------------------------------------------
209 */
210
211/*
212 * The following code cannot be run from FLASH!
213 */
214
215static ulong flash_get_size (vu_long *addr, flash_info_t *info)
216{
217 short i;
218#if 0
219 ulong base = (ulong)addr;
220#endif
221 uchar value;
222
223 /* Write auto select command: read Manufacturer ID */
224#if 0
225 addr[0x0555] = 0x00AA00AA;
226 addr[0x02AA] = 0x00550055;
227 addr[0x0555] = 0x00900090;
228#else
229 addr[0x0555] = 0xAAAAAAAA;
230 addr[0x02AA] = 0x55555555;
231 addr[0x0555] = 0x90909090;
232#endif
233
234 value = addr[0];
235
236 switch (value + (value << 16)) {
237 case AMD_MANUFACT:
238 info->flash_id = FLASH_MAN_AMD;
239 break;
240
241 case FUJ_MANUFACT:
242 info->flash_id = FLASH_MAN_FUJ;
243 break;
244
245 default:
246 info->flash_id = FLASH_UNKNOWN;
247 info->sector_count = 0;
248 info->size = 0;
249 break;
250 }
251
252 value = addr[1]; /* device ID */
253
254 switch (value) {
255 case AMD_ID_F040B:
256 info->flash_id += FLASH_AM040;
257 info->sector_count = 8;
258 info->size = 0x00200000;
259 break; /* => 2 MB */
260
261 case AMD_ID_LV400T:
262 info->flash_id += FLASH_AM400T;
263 info->sector_count = 11;
264 info->size = 0x00100000;
265 break; /* => 1 MB */
266
267 case AMD_ID_LV400B:
268 info->flash_id += FLASH_AM400B;
269 info->sector_count = 11;
270 info->size = 0x00100000;
271 break; /* => 1 MB */
272
273 case AMD_ID_LV800T:
274 info->flash_id += FLASH_AM800T;
275 info->sector_count = 19;
276 info->size = 0x00200000;
277 break; /* => 2 MB */
278
279 case AMD_ID_LV800B:
280 info->flash_id += FLASH_AM800B;
281 info->sector_count = 19;
282 info->size = 0x00200000;
283 break; /* => 2 MB */
284
285 case AMD_ID_LV160T:
286 info->flash_id += FLASH_AM160T;
287 info->sector_count = 35;
288 info->size = 0x00400000;
289 break; /* => 4 MB */
290
291 case AMD_ID_LV160B:
292 info->flash_id += FLASH_AM160B;
293 info->sector_count = 35;
294 info->size = 0x00400000;
295 break; /* => 4 MB */
296#if 0 /* enable when device IDs are available */
297 case AMD_ID_LV320T:
298 info->flash_id += FLASH_AM320T;
299 info->sector_count = 67;
300 info->size = 0x00800000;
301 break; /* => 8 MB */
302
303 case AMD_ID_LV320B:
304 info->flash_id += FLASH_AM320B;
305 info->sector_count = 67;
306 info->size = 0x00800000;
307 break; /* => 8 MB */
308#endif
309 case AMD_ID_LV033C:
310 info->flash_id += FLASH_AM033C;
311 info->sector_count = 64;
312 info->size = 0x01000000;
313 break; /* => 16Mb */
314 default:
315 info->flash_id = FLASH_UNKNOWN;
316 return (0); /* => no or unknown flash */
317
318 }
319
320#if 0
321 /* set up sector start address table */
322 if (info->flash_id & FLASH_BTYPE) {
323 /* set sector offsets for bottom boot block type */
324 info->start[0] = base + 0x00000000;
325 info->start[1] = base + 0x00008000;
326 info->start[2] = base + 0x0000C000;
327 info->start[3] = base + 0x00010000;
328 for (i = 4; i < info->sector_count; i++) {
329 info->start[i] = base + (i * 0x00020000) - 0x00060000;
330 }
331 } else {
332 /* set sector offsets for top boot block type */
333 i = info->sector_count - 1;
334 info->start[i--] = base + info->size - 0x00008000;
335 info->start[i--] = base + info->size - 0x0000C000;
336 info->start[i--] = base + info->size - 0x00010000;
337 for (; i >= 0; i--) {
338 info->start[i] = base + i * 0x00020000;
339 }
340 }
341#else
342 flash_get_offsets ((ulong)addr, &flash_info[0]);
343#endif
344
345 /* check for protected sectors */
346 for (i = 0; i < info->sector_count; i++) {
347 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
348 /* D0 = 1 if protected */
349 addr = (volatile unsigned long *)(info->start[i]);
350#if 1
351 /* We don't know why it happens, but on ICU Board *
352 * for AMD29033C flash we need to resend the command of *
353 * reading flash protection for upper 8 Mb of flash */
354 if ( i == 32 ) {
355 addr[0x0555] = 0xAAAAAAAA;
356 addr[0x02AA] = 0x55555555;
357 addr[0x0555] = 0x90909090;
358 }
359#endif
360 info->protect[i] = addr[2] & 1;
361 }
362
363 /*
364 * Prevent writes to uninitialized FLASH.
365 */
366 if (info->flash_id != FLASH_UNKNOWN) {
367 addr = (volatile unsigned long *)info->start[0];
368#if 0
369 *addr = 0x00F000F0; /* reset bank */
370#else
371 *addr = 0xF0F0F0F0; /* reset bank */
372#endif
373 }
374
375 return (info->size);
376}
377
378
379/*-----------------------------------------------------------------------
380 */
381
382int flash_erase (flash_info_t *info, int s_first, int s_last)
383{
384 vu_long *addr = (vu_long*)(info->start[0]);
385 int flag, prot, sect, l_sect;
386 ulong start, now, last;
387
388 if ((s_first < 0) || (s_first > s_last)) {
389 if (info->flash_id == FLASH_UNKNOWN) {
390 puts ("- missing\n");
391 } else {
392 puts ("- no sectors to erase\n");
393 }
394 return 1;
395 }
396
397 if ((info->flash_id == FLASH_UNKNOWN) ||
398 (info->flash_id > FLASH_AMD_COMP)) {
399 puts ("Can't erase unknown flash type - aborted\n");
400 return 1;
401 }
402
403 prot = 0;
404 for (sect=s_first; sect<=s_last; ++sect) {
405 if (info->protect[sect]) {
406 prot++;
407 }
408 }
409
410 if (prot) {
411 printf ("- Warning: %d protected sectors will not be erased!\n",
412 prot);
413 } else {
414 puts ("\n");
415 }
416
417 l_sect = -1;
418
419 /* Disable interrupts which might cause a timeout here */
420 flag = disable_interrupts();
421
422#if 0
423 addr[0x0555] = 0x00AA00AA;
424 addr[0x02AA] = 0x00550055;
425 addr[0x0555] = 0x00800080;
426 addr[0x0555] = 0x00AA00AA;
427 addr[0x02AA] = 0x00550055;
428#else
429 addr[0x0555] = 0xAAAAAAAA;
430 addr[0x02AA] = 0x55555555;
431 addr[0x0555] = 0x80808080;
432 addr[0x0555] = 0xAAAAAAAA;
433 addr[0x02AA] = 0x55555555;
434#endif
435
436 /* Start erase on unprotected sectors */
437 for (sect = s_first; sect<=s_last; sect++) {
438 if (info->protect[sect] == 0) { /* not protected */
439 addr = (vu_long*)(info->start[sect]);
440#if 0
441 addr[0] = 0x00300030;
442#else
443 addr[0] = 0x30303030;
444#endif
445 l_sect = sect;
446 }
447 }
448
449 /* re-enable interrupts if necessary */
450 if (flag)
451 enable_interrupts();
452
453 /* wait at least 80us - let's wait 1 ms */
454 udelay (1000);
455
456 /*
457 * We wait for the last triggered sector
458 */
459 if (l_sect < 0)
460 goto DONE;
461
462 start = get_timer (0);
463 last = start;
464 addr = (vu_long*)(info->start[l_sect]);
465#if 0
466 while ((addr[0] & 0x00800080) != 0x00800080)
467#else
468 while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
469#endif
470 {
471 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
472 puts ("Timeout\n");
473 return 1;
474 }
475 /* show that we're waiting */
476 if ((now - last) > 1000) { /* every second */
477 putc ('.');
478 last = now;
479 }
480 }
481
482DONE:
483 /* reset to read mode */
484 addr = (volatile unsigned long *)info->start[0];
485#if 0
486 addr[0] = 0x00F000F0; /* reset bank */
487#else
488 addr[0] = 0xF0F0F0F0; /* reset bank */
489#endif
490
491 puts (" done\n");
492 return 0;
493}
494
495/*-----------------------------------------------------------------------
496 * Copy memory to flash, returns:
497 * 0 - OK
498 * 1 - write timeout
499 * 2 - Flash not erased
500 */
501
502int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
503{
504 ulong cp, wp, data;
505 int i, l, rc;
506
507 wp = (addr & ~3); /* get lower word aligned address */
508
509 /*
510 * handle unaligned start bytes
511 */
512 if ((l = addr - wp) != 0) {
513 data = 0;
514 for (i=0, cp=wp; i<l; ++i, ++cp) {
515 data = (data << 8) | (*(uchar *)cp);
516 }
517 for (; i<4 && cnt>0; ++i) {
518 data = (data << 8) | *src++;
519 --cnt;
520 ++cp;
521 }
522 for (; cnt==0 && i<4; ++i, ++cp) {
523 data = (data << 8) | (*(uchar *)cp);
524 }
525
526 if ((rc = write_word(info, wp, data)) != 0) {
527 return (rc);
528 }
529 wp += 4;
530 }
531
532 /*
533 * handle word aligned part
534 */
535 while (cnt >= 4) {
536 data = 0;
537 for (i=0; i<4; ++i) {
538 data = (data << 8) | *src++;
539 }
540 if ((rc = write_word(info, wp, data)) != 0) {
541 return (rc);
542 }
543 wp += 4;
544 cnt -= 4;
545 }
546
547 if (cnt == 0) {
548 return (0);
549 }
550
551 /*
552 * handle unaligned tail bytes
553 */
554 data = 0;
555 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
556 data = (data << 8) | *src++;
557 --cnt;
558 }
559 for (; i<4; ++i, ++cp) {
560 data = (data << 8) | (*(uchar *)cp);
561 }
562
563 return (write_word(info, wp, data));
564}
565
566/*-----------------------------------------------------------------------
567 * Write a word to Flash, returns:
568 * 0 - OK
569 * 1 - write timeout
570 * 2 - Flash not erased
571 */
572static int write_word (flash_info_t *info, ulong dest, ulong data)
573{
574 vu_long *addr = (vu_long*)(info->start[0]);
575 ulong start;
576 int flag;
577
578 /* Check if Flash is (sufficiently) erased */
579 if ((*((vu_long *)dest) & data) != data) {
580 return (2);
581 }
582 /* Disable interrupts which might cause a timeout here */
583 flag = disable_interrupts();
584
585#if 0
586 addr[0x0555] = 0x00AA00AA;
587 addr[0x02AA] = 0x00550055;
588 addr[0x0555] = 0x00A000A0;
589#else
590 addr[0x0555] = 0xAAAAAAAA;
591 addr[0x02AA] = 0x55555555;
592 addr[0x0555] = 0xA0A0A0A0;
593#endif
594
595 *((vu_long *)dest) = data;
596
597 /* re-enable interrupts if necessary */
598 if (flag)
599 enable_interrupts();
600
601 /* data polling for D7 */
602 start = get_timer (0);
603#if 0
604 while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080))
605#else
606 while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080))
607#endif
608 {
609 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
610 return (1);
611 }
612 }
613 return (0);
614}
615
616/*-----------------------------------------------------------------------
617 */