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MINI2440: Add a command to re-init CFI NOR
[u-boot-openmoko/mini2440.git] / board / mvblue / flash.c
blob8df573aa0bb84418e527c5a77c4396fd7c5c7890
1 /*
2 * (C) Copyright 2000
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 * (C) Copyright 2001-2003
5 *
6 * Changes for MATRIX Vision mvBLUE devices
7 * MATRIX Vision GmbH / hg,as info@matrix-vision.de
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * MA 02111-1307 USA
23 */
24
25 #include <common.h>
26 #include <mpc824x.h>
27
28 #if 0
29 #define mvdebug(p) printf ##p
30 #else
31 #define mvdebug(p)
32 #endif
33
34 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
35
36 #define FLASH_BUS_WIDTH 8
37
38 #if (FLASH_BUS_WIDTH==32)
39 #define FLASH_DATA_MASK 0xffffffff
40 #define FLASH_SHIFT 1
41 #define FDT vu_long
42 #elif (FLASH_BUS_WIDTH==16)
43 #define FLASH_DATA_MASK 0xff
44 #define FLASH_SHIFT 0
45 #define FDT vu_short
46 #elif (FLASH_BUS_WIDTH==8)
47 #define FLASH_DATA_MASK 0xff
48 #define FLASH_SHIFT 0
49 #define FDT vu_char
50 #else
51 #error FLASH_BUS_WIDTH undefined
52 #endif
53
54 /*-----------------------------------------------------------------------
55 * Functions
56 */
57 static ulong flash_get_size (vu_long *address, flash_info_t *info);
58 static int write_word (flash_info_t *info, ulong dest, ulong data);
59 static void flash_get_offsets (ulong base, flash_info_t *info);
60
61 /*-----------------------------------------------------------------------
62 */
63 unsigned long flash_init (void)
64 {
65 unsigned long size_b0;
66 int i;
67
68 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
69 flash_info[i].flash_id = FLASH_UNKNOWN;
70 }
71
72 size_b0 = flash_get_size((vu_long *)0xffc00000, &flash_info[0]);
73
74 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
75 printf ("## Unknown FLASH : Size = 0x%08lx = %ld MB\n",
76 size_b0, size_b0<<20);
77 }
78
79 flash_get_offsets (0xffc00000, &flash_info[0]);
80 flash_info[0].size = size_b0;
81
82 /* monitor protection OFF by default */
83 flash_protect ( FLAG_PROTECT_CLEAR, 0xffc00000, 0x2000, flash_info );
84
85 return size_b0;
86 }
87
88 /*-----------------------------------------------------------------------
89 */
90 static void flash_get_offsets (ulong base, flash_info_t *info)
91 {
92 int i;
93
94 /* set up sector start address table */
95 if (info->flash_id & FLASH_BTYPE)
96 { /* bottom boot sector types - these are the useful ones! */
97 /* set sector offsets for bottom boot block type */
98 if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B)
99 { /* AMDLV320B has 8 x 8k bottom boot sectors */
100 for (i = 0; i < 8; i++) /* +8k */
101 info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
102 for (; i < info->sector_count; i++) /* +64k */
103 info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00070000 << FLASH_SHIFT);
104 }
105 else
106 { /* other types have 4 bottom boot sectors (16,8,8,32) */
107 i = 0;
108 info->start[i++] = base + 0x00000000; /* - */
109 info->start[i++] = base + (0x00004000 << FLASH_SHIFT); /* +16k */
110 info->start[i++] = base + (0x00006000 << FLASH_SHIFT); /* +8k */
111 info->start[i++] = base + (0x00008000 << FLASH_SHIFT); /* +8k */
112 info->start[i++] = base + (0x00010000 << FLASH_SHIFT); /* +32k */
113 for (; i < info->sector_count; i++) /* +64k */
114 info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00030000 << FLASH_SHIFT);
115 }
116 }
117 else
118 { /* top boot sector types - not so useful */
119 /* set sector offsets for top boot block type */
120 if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T)
121 { /* AMDLV320T has 8 x 8k top boot sectors */
122 for (i = 0; i < info->sector_count - 8; i++) /* +64k */
123 info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
124 for (; i < info->sector_count; i++) /* +8k */
125 info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
126 }
127 else
128 { /* other types have 4 top boot sectors (32,8,8,16) */
129 for (i = 0; i < info->sector_count - 4; i++) /* +64k */
130 info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
131
132 info->start[i++] = base + info->size - (0x00010000 << FLASH_SHIFT); /* -32k */
133 info->start[i++] = base + info->size - (0x00008000 << FLASH_SHIFT); /* -8k */
134 info->start[i++] = base + info->size - (0x00006000 << FLASH_SHIFT); /* -8k */
135 info->start[i] = base + info->size - (0x00004000 << FLASH_SHIFT); /* -16k */
136 }
137 }
138 }
139
140 /*-----------------------------------------------------------------------
141 */
142 void flash_print_info (flash_info_t *info)
143 {
144 int i;
145
146 if (info->flash_id == FLASH_UNKNOWN) {
147 printf ("missing or unknown FLASH type\n");
148 return;
149 }
150
151 switch (info->flash_id & FLASH_VENDMASK) {
152 case FLASH_MAN_AMD: printf ("AMD "); break;
153 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
154 case FLASH_MAN_STM: printf ("ST "); break;
155 default: printf ("Unknown Vendor "); break;
156 }
157
158 switch (info->flash_id & FLASH_TYPEMASK) {
159 case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
160 break;
161 case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
162 break;
163 case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
164 break;
165 case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
166 break;
167 case FLASH_STMW320DB: printf ("M29W320B (32 Mbit, bottom boot sect)\n");
168 break;
169 case FLASH_STMW320DT: printf ("M29W320T (32 Mbit, top boot sector)\n");
170 break;
171 default: printf ("Unknown Chip Type\n");
172 break;
173 }
174
175 printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
176
177 printf (" Sector Start Addresses:");
178 for (i=0; i<info->sector_count; ++i) {
179 if ((i % 5) == 0)
180 printf ("\n ");
181 printf (" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " ");
182 }
183 printf ("\n");
184 }
185
186 /*
187 * The following code cannot be run from FLASH!
188 */
189
190 #define AMD_ID_LV160T_MVS (AMD_ID_LV160T & FLASH_DATA_MASK)
191 #define AMD_ID_LV160B_MVS (AMD_ID_LV160B & FLASH_DATA_MASK)
192 #define AMD_ID_LV320T_MVS (AMD_ID_LV320T & FLASH_DATA_MASK)
193 #define AMD_ID_LV320B_MVS (AMD_ID_LV320B & FLASH_DATA_MASK)
194 #define STM_ID_W320DT_MVS (STM_ID_29W320DT & FLASH_DATA_MASK)
195 #define STM_ID_W320DB_MVS (STM_ID_29W320DB & FLASH_DATA_MASK)
196 #define AMD_MANUFACT_MVS (AMD_MANUFACT & FLASH_DATA_MASK)
197 #define FUJ_MANUFACT_MVS (FUJ_MANUFACT & FLASH_DATA_MASK)
198 #define STM_MANUFACT_MVS (STM_MANUFACT & FLASH_DATA_MASK)
199
200 #if (FLASH_BUS_WIDTH >= 16)
201 #define AUTOSELECT_ADDR1 0x0555
202 #define AUTOSELECT_ADDR2 0x02AA
203 #define AUTOSELECT_ADDR3 AUTOSELECT_ADDR1
204 #else
205 #define AUTOSELECT_ADDR1 0x0AAA
206 #define AUTOSELECT_ADDR2 0x0555
207 #define AUTOSELECT_ADDR3 AUTOSELECT_ADDR1
208 #endif
209
210 #define AUTOSELECT_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
211 #define AUTOSELECT_DATA2 (0x00550055 & FLASH_DATA_MASK)
212 #define AUTOSELECT_DATA3 (0x00900090 & FLASH_DATA_MASK)
213
214 #define RESET_BANK_DATA (0x00F000F0 & FLASH_DATA_MASK)
215
216
217 static ulong flash_get_size (vu_long *address, flash_info_t *info)
218 {
219 short i;
220 FDT value;
221 FDT *addr = (FDT *)address;
222
223 ulong base = (ulong)address;
224 addr[AUTOSELECT_ADDR1] = AUTOSELECT_DATA1;
225 addr[AUTOSELECT_ADDR2] = AUTOSELECT_DATA2;
226 addr[AUTOSELECT_ADDR3] = AUTOSELECT_DATA3;
227 __asm__ __volatile__("sync");
228
229 udelay(180);
230
231 value = addr[0]; /* manufacturer ID */
232 switch (value) {
233 case AMD_MANUFACT_MVS:
234 info->flash_id = FLASH_MAN_AMD;
235 break;
236 case FUJ_MANUFACT_MVS:
237 info->flash_id = FLASH_MAN_FUJ;
238 break;
239 case STM_MANUFACT_MVS:
240 info->flash_id = FLASH_MAN_STM;
241 break;
242 default:
243 info->flash_id = FLASH_UNKNOWN;
244 info->sector_count = 0;
245 info->size = 0;
246 return (0); /* no or unknown flash */
247 }
248 #if (FLASH_BUS_WIDTH >= 16)
249 value = addr[1]; /* device ID */
250 #else
251 value = addr[2]; /* device ID */
252 #endif
253
254 switch (value) {
255 case AMD_ID_LV160T_MVS:
256 info->flash_id += FLASH_AM160T;
257 info->sector_count = 37;
258 info->size = (0x00200000 << FLASH_SHIFT);
259 break; /* => 2 or 4 MB */
260
261 case AMD_ID_LV160B_MVS:
262 info->flash_id += FLASH_AM160B;
263 info->sector_count = 37;
264 info->size = (0x00200000 << FLASH_SHIFT);
265 break; /* => 2 or 4 MB */
266
267 case AMD_ID_LV320T_MVS:
268 info->flash_id += FLASH_AM320T;
269 info->sector_count = 71;
270 info->size = (0x00400000 << FLASH_SHIFT);
271 break; /* => 4 or 8 MB */
272
273 case AMD_ID_LV320B_MVS:
274 info->flash_id += FLASH_AM320B;
275 info->sector_count = 71;
276 info->size = (0x00400000 << FLASH_SHIFT);
277 break; /* => 4 or 8MB */
278
279 case STM_ID_W320DT_MVS:
280 info->flash_id += FLASH_STMW320DT;
281 info->sector_count = 67;
282 info->size = (0x00400000 << FLASH_SHIFT);
283 break; /* => 4 or 8 MB */
284
285 case STM_ID_W320DB_MVS:
286 info->flash_id += FLASH_STMW320DB;
287 info->sector_count = 67;
288 info->size = (0x00400000 << FLASH_SHIFT);
289 break; /* => 4 or 8MB */
290
291 default:
292 info->flash_id = FLASH_UNKNOWN;
293 return (0); /* => no or unknown flash */
294
295 }
296
297 /* set up sector start address table */
298 flash_get_offsets (base, info);
299
300 /* check for protected sectors */
301 for (i = 0; i < info->sector_count; i++) {
302 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
303 /* D0 = 1 if protected */
304 addr = (FDT *)(info->start[i]);
305 info->protect[i] = addr[2] & 1;
306 }
307
308 /*
309 * Prevent writes to uninitialized FLASH.
310 */
311 if (info->flash_id != FLASH_UNKNOWN) {
312 addr = (FDT *)info->start[0];
313 *addr = RESET_BANK_DATA; /* reset bank */
314 }
315 return (info->size);
316 }
317
318
319 /*-----------------------------------------------------------------------
320 */
321
322 #if (FLASH_BUS_WIDTH >= 16)
323 #define ERASE_ADDR1 0x0555
324 #define ERASE_ADDR2 0x02AA
325 #else
326 #define ERASE_ADDR1 0x0AAA
327 #define ERASE_ADDR2 0x0555
328 #endif
329
330 #define ERASE_ADDR3 ERASE_ADDR1
331 #define ERASE_ADDR4 ERASE_ADDR1
332 #define ERASE_ADDR5 ERASE_ADDR2
333
334 #define ERASE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
335 #define ERASE_DATA2 (0x00550055 & FLASH_DATA_MASK)
336 #define ERASE_DATA3 (0x00800080 & FLASH_DATA_MASK)
337 #define ERASE_DATA4 ERASE_DATA1
338 #define ERASE_DATA5 ERASE_DATA2
339
340 #define ERASE_SECTOR_DATA (0x00300030 & FLASH_DATA_MASK)
341 #define ERASE_CHIP_DATA (0x00100010 & FLASH_DATA_MASK)
342 #define ERASE_CONFIRM_DATA (0x00800080 & FLASH_DATA_MASK)
343
344 int flash_erase (flash_info_t *info, int s_first, int s_last)
345 {
346 FDT *addr = (FDT *)(info->start[0]);
347
348 int prot, sect, l_sect, flag;
349 ulong start, now, last;
350
351 __asm__ __volatile__ ("sync");
352 addr[0] = 0xf0;
353 udelay(1000);
354
355 printf("\nflash_erase: first = %d @ 0x%08lx\n", s_first, info->start[s_first] );
356 printf(" last = %d @ 0x%08lx\n", s_last , info->start[s_last ] );
357
358 if ((s_first < 0) || (s_first > s_last)) {
359 if (info->flash_id == FLASH_UNKNOWN) {
360 printf ("- missing\n");
361 } else {
362 printf ("- no sectors to erase\n");
363 }
364 return 1;
365 }
366
367 if ((info->flash_id == FLASH_UNKNOWN) || (info->flash_id > FLASH_AMD_COMP)) {
368 printf ("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
369 return 1;
370 }
371
372 prot = 0;
373 for (sect=s_first; sect<=s_last; ++sect) {
374 if (info->protect[sect]) {
375 prot++;
376 }
377 }
378
379 if (prot) {
380 printf ("- Warning: %d protected sectors will not be erased!\n",
381 prot);
382 } else {
383 printf ("\n");
384 }
385
386 l_sect = -1;
387
388 /* Disable interrupts which might cause a timeout here */
389 flag = disable_interrupts();
390
391 addr[ERASE_ADDR1] = ERASE_DATA1;
392 addr[ERASE_ADDR2] = ERASE_DATA2;
393 addr[ERASE_ADDR3] = ERASE_DATA3;
394 addr[ERASE_ADDR4] = ERASE_DATA4;
395 addr[ERASE_ADDR5] = ERASE_DATA5;
396
397 for (sect = s_first; sect <= s_last; sect++) {
398 if (info->protect[sect] == 0) {
399 addr = (FDT *)(info->start[sect]);
400 addr[0] = ERASE_SECTOR_DATA;
401 l_sect = sect;
402 }
403 }
404
405 if (flag)
406 enable_interrupts();
407
408 /*
409 * We wait for the last triggered sector
410 */
411 if (l_sect < 0)
412 goto DONE;
413
414 start = get_timer (0);
415 last = start;
416 addr = (FDT *)(info->start[l_sect]);
417
418 while ((addr[0] & ERASE_CONFIRM_DATA) != ERASE_CONFIRM_DATA) {
419 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
420 printf ("Timeout\n");
421 return 1;
422 }
423 /* show that we're waiting */
424 if ((now - last) > 1000) { /* every second */
425 putc ('.');
426 last = now;
427 }
428 }
429
430 DONE:
431 printf (" done\n");
432 return 0;
433 }
434
435 /*-----------------------------------------------------------------------
436 * Copy memory to flash, returns:
437 * 0 - OK
438 * 1 - write timeout
439 * 2 - Flash not erased
440 */
441
442 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
443 {
444 #define BUFF_INC 4
445 ulong cp, wp, data;
446 int i, l, rc;
447
448 mvdebug (("+write_buff %p ==> 0x%08lx, count = 0x%08lx\n", src, addr, cnt));
449
450 wp = (addr & ~3); /* get lower word aligned address */
451 /*
452 * handle unaligned start bytes
453 */
454 if ((l = addr - wp) != 0) {
455 mvdebug ((" handle unaligned start bytes (cnt = 0x%08lx)\n", cnt));
456 data = 0;
457 for (i=0, cp=wp; i<l; ++i, ++cp) {
458 data = (data << 8) | (*(uchar *)cp);
459 }
460 for (; i<BUFF_INC && cnt>0; ++i) {
461 data = (data << 8) | *src++;
462 --cnt;
463 ++cp;
464 }
465 for (; cnt==0 && i<BUFF_INC; ++i, ++cp) {
466 data = (data << 8) | (*(uchar *)cp);
467 }
468
469 if ((rc = write_word(info, wp, data)) != 0) {
470 return (rc);
471 }
472 wp += BUFF_INC;
473 }
474
475 /*
476 * handle (half)word aligned part
477 */
478 mvdebug ((" handle word aligned part (cnt = 0x%08lx)\n", cnt));
479 while (cnt >= BUFF_INC) {
480 data = 0;
481 for (i=0; i<BUFF_INC; ++i) {
482 data = (data << 8) | *src++;
483 }
484 if ((rc = write_word(info, wp, data)) != 0) {
485 return (rc);
486 }
487 wp += BUFF_INC;
488 cnt -= BUFF_INC;
489 }
490
491 if (cnt == 0) {
492 return (0);
493 }
494
495 /*
496 * handle unaligned tail bytes
497 */
498 mvdebug ((" handle unaligned tail bytes (cnt = 0x%08lx)\n", cnt));
499 data = 0;
500 for (i=0, cp=wp; i<BUFF_INC && cnt>0; ++i, ++cp) {
501 data = (data << 8) | *src++;
502 --cnt;
503 }
504 for (; i<BUFF_INC; ++i, ++cp) {
505 data = (data << 8) | (*(uchar *)cp);
506 }
507
508 return (write_word(info, wp, data));
509 }
510
511 #if (FLASH_BUS_WIDTH >= 16)
512 #define WRITE_ADDR1 0x0555
513 #define WRITE_ADDR2 0x02AA
514 #else
515 #define WRITE_ADDR1 0x0AAA
516 #define WRITE_ADDR2 0x0555
517 #define WRITE_ADDR3 WRITE_ADDR1
518 #endif
519
520 #define WRITE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
521 #define WRITE_DATA2 (0x00550055 & FLASH_DATA_MASK)
522 #define WRITE_DATA3 (0x00A000A0 & FLASH_DATA_MASK)
523
524 #define WRITE_CONFIRM_DATA ERASE_CONFIRM_DATA
525
526 /*-----------------------------------------------------------------------
527 * Write a byte to Flash, returns:
528 * 0 - OK
529 * 1 - write timeout
530 * 2 - Flash not erased
531 */
532 static int write_char (flash_info_t *info, ulong dest, uchar data)
533 {
534 vu_char *addr = (vu_char *)(info->start[0]);
535 ulong start;
536 int flag;
537
538 /* Check if Flash is (sufficiently) erased */
539 if ((*((vu_char *)dest) & data) != data) {
540 printf(" *** ERROR: Flash not erased !\n");
541 return (2);
542 }
543 flag = disable_interrupts();
544
545 addr[WRITE_ADDR1] = WRITE_DATA1;
546 addr[WRITE_ADDR2] = WRITE_DATA2;
547 addr[WRITE_ADDR3] = WRITE_DATA3;
548 *((vu_char *)dest) = data;
549
550 if (flag)
551 enable_interrupts();
552
553 /* data polling for D7 */
554 start = get_timer (0);
555 addr = (vu_char *)dest;
556 while (( (*addr) & WRITE_CONFIRM_DATA) != (data & WRITE_CONFIRM_DATA)) {
557 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
558 printf(" *** ERROR: Flash write timeout !");
559 return (1);
560 }
561 }
562 mvdebug (("-write_byte\n"));
563 return (0);
564 }
565
566 /*-----------------------------------------------------------------------
567 * Write a word to Flash, returns:
568 * 0 - OK
569 * 1 - write timeout
570 * 2 - Flash not erased
571 */
572 static int write_word (flash_info_t *info, ulong dest, ulong data)
573 {
574 int i,
575 result = 0;
576
577 mvdebug (("+write_word : 0x%08lx @ 0x%08lx\n", data, dest));
578 for ( i=0; (i < 4) && (result == 0); i++, dest+=1 )
579 result = write_char (info, dest, (data >> (8*(3-i))) & 0xff );
580 mvdebug (("-write_word\n"));
581 return result;
582 }
583 /*---------------------------------------------------------------- */
Fork of the u-boot for for Samsung based MINI2440 board