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[u-boot.git] / board / sbc8240 / flash.c
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466b7410
WD		 1/*
2 * (C) Copyright 2000-2004
3 * Wolfgang Denk, DENX Software Engineering, [email protected].
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/*
25 * Modified 4/5/2001
26 * Wait for completion of each sector erase command issued
27 * 4/5/2001
28 * Chris Hallinan - DS4.COM, Inc. - [email protected]
29 */
30
31#include <common.h>
32#include <mpc824x.h>
33#include <asm/processor.h>
34
6d0f6bcf
JCPV		 35#if CONFIG_SYS_MAX_FLASH_BANKS != 1
36#error "CONFIG_SYS_MAX_FLASH_BANKS must be 1"
466b7410 37#endif
6d0f6bcf 38flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
466b7410
WD		 39
40/*-----------------------------------------------------------------------
41 * Functions
42 */
43static ulong flash_get_size (vu_long * addr, flash_info_t * info);
44static int write_word (flash_info_t * info, ulong dest, ulong data);
45static void flash_get_offsets (ulong base, flash_info_t * info);
46
47#define ADDR0 0x5555
48#define ADDR1 0x2aaa
49#define FLASH_WORD_SIZE unsigned char
50
51/*-----------------------------------------------------------------------
52 */
53
54unsigned long flash_init (void)
55{
56 unsigned long size_b0;
57
58 /* Init: no FLASHes known */
59 flash_info[0].flash_id = FLASH_UNKNOWN;
60
61 /* Static FLASH Bank configuration here - FIXME XXX */
62
63 size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
64
65 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
66 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
67 size_b0, size_b0 << 20);
68 }
69
70 /* Only one bank */
71 /* Setup offsets */
72 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
73
74 /* Monitor protection ON by default */
75 (void) flash_protect (FLAG_PROTECT_SET,
76 FLASH_BASE0_PRELIM,
77 FLASH_BASE0_PRELIM + monitor_flash_len - 1,
78 &flash_info[0]);
79 flash_info[0].size = size_b0;
80
81 return size_b0;
82}
83
84
85/*-----------------------------------------------------------------------
86 */
87static void flash_get_offsets (ulong base, flash_info_t * info)
88{
89 int i;
90
91 /* set up sector start address table */
92 if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
93 (info->flash_id == FLASH_AM040)) {
94 for (i = 0; i < info->sector_count; i++)
95 info->start[i] = base + (i * 0x00010000);
96 } else {
97 if (info->flash_id & FLASH_BTYPE) {
98 /* set sector offsets for bottom boot block type */
99 info->start[0] = base + 0x00000000;
100 info->start[1] = base + 0x00004000;
101 info->start[2] = base + 0x00006000;
102 info->start[3] = base + 0x00008000;
103 for (i = 4; i < info->sector_count; i++) {
104 info->start[i] =
105 base + (i * 0x00010000) - 0x00030000;
106 }
107 } else {
108 /* set sector offsets for top boot block type */
109 i = info->sector_count - 1;
110 info->start[i--] = base + info->size - 0x00004000;
111 info->start[i--] = base + info->size - 0x00006000;
112 info->start[i--] = base + info->size - 0x00008000;
113 for (; i >= 0; i--) {
114 info->start[i] = base + i * 0x00010000;
115 }
116 }
117 }
118}
119
120/*-----------------------------------------------------------------------
121 */
122void flash_print_info (flash_info_t * info)
123{
124 int i;
125 int k;
126 int size;
127 int erased;
128 volatile unsigned long *flash;
129
130 if (info->flash_id == FLASH_UNKNOWN) {
131 printf ("missing or unknown FLASH type\n");
132 return;
133 }
134
135 switch (info->flash_id & FLASH_VENDMASK) {
136 case FLASH_MAN_AMD:
137 printf ("AMD ");
138 break;
139 case FLASH_MAN_FUJ:
140 printf ("FUJITSU ");
141 break;
142 case FLASH_MAN_SST:
143 printf ("SST ");
144 break;
145 default:
146 printf ("Unknown Vendor ");
147 break;
148 }
149
150 switch (info->flash_id & FLASH_TYPEMASK) {
151 case FLASH_AM040:
152 printf ("AM29F040 (512 Kbit, uniform sector size)\n");
153 break;
154 case FLASH_AM400B:
155 printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
156 break;
157 case FLASH_AM400T:
158 printf ("AM29LV400T (4 Mbit, top boot sector)\n");
159 break;
160 case FLASH_AM800B:
161 printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
162 break;
163 case FLASH_AM800T:
164 printf ("AM29LV800T (8 Mbit, top boot sector)\n");
165 break;
166 case FLASH_AM160B:
167 printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
168 break;
169 case FLASH_AM160T:
170 printf ("AM29LV160T (16 Mbit, top boot sector)\n");
171 break;
172 case FLASH_AM320B:
173 printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
174 break;
175 case FLASH_AM320T:
176 printf ("AM29LV320T (32 Mbit, top boot sector)\n");
177 break;
178 case FLASH_SST800A:
179 printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
180 break;
181 case FLASH_SST160A:
182 printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
183 break;
184 default:
185 printf ("Unknown Chip Type\n");
186 break;
187 }
188
189 printf (" Size: %ld KB in %d Sectors\n",
190 info->size >> 10, info->sector_count);
191
192 printf (" Sector Start Addresses:");
193 for (i = 0; i < info->sector_count; ++i) {
194 /*
195 * Check if whole sector is erased
196 */
197 if (i != (info->sector_count - 1))
198 size = info->start[i + 1] - info->start[i];
199 else
200 size = info->start[0] + info->size - info->start[i];
201 erased = 1;
202 flash = (volatile unsigned long *) info->start[i];
203 size = size >> 2; /* divide by 4 for longword access */
204 for (k = 0; k < size; k++) {
205 if (*flash++ != 0xffffffff) {
206 erased = 0;
207 break;
208 }
209 }
210
211 if ((i % 5) == 0)
212 printf ("\n ");
213 printf (" %08lX%s%s",
214 info->start[i],
215 erased ? " E" : " ", info->protect[i] ? "RO " : " "
216 );
217 }
218 printf ("\n");
219 return;
220}
221
222/*-----------------------------------------------------------------------
223 */
224
225
226/*-----------------------------------------------------------------------
227 */
228
229/*
230 * The following code cannot be run from FLASH!
231 */
232static ulong flash_get_size (vu_long * addr, flash_info_t * info)
233{
234 short i;
235 FLASH_WORD_SIZE value;
236 ulong base = (ulong) addr;
237 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
238
239 /* Write auto select command: read Manufacturer ID */
240 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
241 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
242 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
243
244 value = addr2[0];
245
246 switch (value) {
247 case (FLASH_WORD_SIZE) AMD_MANUFACT:
248 info->flash_id = FLASH_MAN_AMD;
249 break;
250 case (FLASH_WORD_SIZE) FUJ_MANUFACT:
251 info->flash_id = FLASH_MAN_FUJ;
252 break;
253 case (FLASH_WORD_SIZE) SST_MANUFACT:
254 info->flash_id = FLASH_MAN_SST;
255 break;
256 default:
257 info->flash_id = FLASH_UNKNOWN;
258 info->sector_count = 0;
259 info->size = 0;
260 return (0); /* no or unknown flash */
261 }
262
263 value = addr2[1]; /* device ID */
264
265 switch (value) {
266 case (FLASH_WORD_SIZE) AMD_ID_F040B:
267 info->flash_id += FLASH_AM040;
268 info->sector_count = 8;
269 info->size = 0x0080000; /* => 512 ko */
270 break;
271 case (FLASH_WORD_SIZE) AMD_ID_LV040B:
272 info->flash_id += FLASH_AM040;
273 info->sector_count = 8;
274 info->size = 0x0080000; /* => 512 ko */
275 break;
276 case (FLASH_WORD_SIZE) AMD_ID_LV400T:
277 info->flash_id += FLASH_AM400T;
278 info->sector_count = 11;
279 info->size = 0x00080000;
280 break; /* => 0.5 MB */
281
282 case (FLASH_WORD_SIZE) AMD_ID_LV400B:
283 info->flash_id += FLASH_AM400B;
284 info->sector_count = 11;
285 info->size = 0x00080000;
286 break; /* => 0.5 MB */
287
288 case (FLASH_WORD_SIZE) AMD_ID_LV800T:
289 info->flash_id += FLASH_AM800T;
290 info->sector_count = 19;
291 info->size = 0x00100000;
292 break; /* => 1 MB */
293
294 case (FLASH_WORD_SIZE) AMD_ID_LV800B:
295 info->flash_id += FLASH_AM800B;
296 info->sector_count = 19;
297 info->size = 0x00100000;
298 break; /* => 1 MB */
299
300 case (FLASH_WORD_SIZE) AMD_ID_LV160T:
301 info->flash_id += FLASH_AM160T;
302 info->sector_count = 35;
303 info->size = 0x00200000;
304 break; /* => 2 MB */
305
306 case (FLASH_WORD_SIZE) AMD_ID_LV160B:
307 info->flash_id += FLASH_AM160B;
308 info->sector_count = 35;
309 info->size = 0x00200000;
310 break; /* => 2 MB */
311#if 0 /* enable when device IDs are available */
312 case (FLASH_WORD_SIZE) AMD_ID_LV320T:
313 info->flash_id += FLASH_AM320T;
314 info->sector_count = 67;
315 info->size = 0x00400000;
316 break; /* => 4 MB */
317
318 case (FLASH_WORD_SIZE) AMD_ID_LV320B:
319 info->flash_id += FLASH_AM320B;
320 info->sector_count = 67;
321 info->size = 0x00400000;
322 break; /* => 4 MB */
323#endif
324 case (FLASH_WORD_SIZE) SST_ID_xF800A:
325 info->flash_id += FLASH_SST800A;
326 info->sector_count = 16;
327 info->size = 0x00100000;
328 break; /* => 1 MB */
329
330 case (FLASH_WORD_SIZE) SST_ID_xF160A:
331 info->flash_id += FLASH_SST160A;
332 info->sector_count = 32;
333 info->size = 0x00200000;
334 break; /* => 2 MB */
335
336 default:
337 info->flash_id = FLASH_UNKNOWN;
338 return (0); /* => no or unknown flash */
339
340 }
341
342 /* set up sector start address table */
343 if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
344 (info->flash_id == FLASH_AM040)) {
345 for (i = 0; i < info->sector_count; i++)
346 info->start[i] = base + (i * 0x00010000);
347 } else {
348 if (info->flash_id & FLASH_BTYPE) {
349 /* set sector offsets for bottom boot block type */
350 info->start[0] = base + 0x00000000;
351 info->start[1] = base + 0x00004000;
352 info->start[2] = base + 0x00006000;
353 info->start[3] = base + 0x00008000;
354 for (i = 4; i < info->sector_count; i++) {
355 info->start[i] =
356 base + (i * 0x00010000) - 0x00030000;
357 }
358 } else {
359 /* set sector offsets for top boot block type */
360 i = info->sector_count - 1;
361 info->start[i--] = base + info->size - 0x00004000;
362 info->start[i--] = base + info->size - 0x00006000;
363 info->start[i--] = base + info->size - 0x00008000;
364 for (; i >= 0; i--) {
365 info->start[i] = base + i * 0x00010000;
366 }
367 }
368 }
369
370 /* check for protected sectors */
371 for (i = 0; i < info->sector_count; i++) {
372 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
373 /* D0 = 1 if protected */
374 addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
375 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
376 info->protect[i] = 0;
377 else
378 info->protect[i] = addr2[2] & 1;
379 }
380
381 /*
382 * Prevent writes to uninitialized FLASH.
383 */
384 if (info->flash_id != FLASH_UNKNOWN) {
385 addr2 = (FLASH_WORD_SIZE *) info->start[0];
386 *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
387 }
388
389 return (info->size);
390}
391
392int wait_for_DQ7 (flash_info_t * info, int sect)
393{
394 ulong start, now, last;
395 volatile FLASH_WORD_SIZE *addr =
396 (FLASH_WORD_SIZE *) (info->start[sect]);
397
398 start = get_timer (0);
399 last = start;
400 while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
401 (FLASH_WORD_SIZE) 0x00800080) {
6d0f6bcf 402 if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
466b7410
WD		 403 printf ("Timeout\n");
404 return -1;
405 }
406 /* show that we're waiting */
407 if ((now - last) > 1000) { /* every second */
408 putc ('.');
409 last = now;
410 }
411 }
412 return 0;
413}
414
415/*-----------------------------------------------------------------------
416 */
417
418int flash_erase (flash_info_t * info, int s_first, int s_last)
419{
420 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
421 volatile FLASH_WORD_SIZE *addr2;
422 int flag, prot, sect, l_sect;
423 int i;
424
425 if ((s_first < 0) || (s_first > s_last)) {
426 if (info->flash_id == FLASH_UNKNOWN) {
427 printf ("- missing\n");
428 } else {
429 printf ("- no sectors to erase\n");
430 }
431 return 1;
432 }
433
434 if (info->flash_id == FLASH_UNKNOWN) {
435 printf ("Can't erase unknown flash type - aborted\n");
436 return 1;
437 }
438
439 prot = 0;
440 for (sect = s_first; sect <= s_last; ++sect) {
441 if (info->protect[sect]) {
442 prot++;
443 }
444 }
445
446 if (prot) {
447 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
448 } else {
449 printf ("\n");
450 }
451
452 l_sect = -1;
453
454 /* Disable interrupts which might cause a timeout here */
455 flag = disable_interrupts ();
456
457 /* Start erase on unprotected sectors */
458 for (sect = s_first; sect <= s_last; sect++) {
459 if (info->protect[sect] == 0) { /* not protected */
460 addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
461 printf ("Erasing sector %p\n", addr2); /* CLH */
462
463 if ((info->flash_id & FLASH_VENDMASK) ==
464 FLASH_MAN_SST) {
465 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
466 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
467 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
468 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
469 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
470 addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
471 for (i = 0; i < 50; i++)
472 udelay (1000); /* wait 1 ms */
473 } else {
474 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
475 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
476 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
477 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
478 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
479 addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
480 }
481 l_sect = sect;
482 /*
483 * Wait for each sector to complete, it's more
484 * reliable. According to AMD Spec, you must
485 * issue all erase commands within a specified
486 * timeout. This has been seen to fail, especially
487 * if printf()s are included (for debug)!!
488 */
489 wait_for_DQ7 (info, sect);
490 }
491 }
492
493 /* re-enable interrupts if necessary */
494 if (flag)
495 enable_interrupts ();
496
497 /* wait at least 80us - let's wait 1 ms */
498 udelay (1000);
499
500#if 0
501 /*
502 * We wait for the last triggered sector
503 */
504 if (l_sect < 0)
505 goto DONE;
506 wait_for_DQ7 (info, l_sect);
507
508 DONE:
509#endif
510 /* reset to read mode */
511 addr = (FLASH_WORD_SIZE *) info->start[0];
512 addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
513
514 printf (" done\n");
515 return 0;
516}
517
518/*-----------------------------------------------------------------------
519 * Copy memory to flash, returns:
520 * 0 - OK
521 * 1 - write timeout
522 * 2 - Flash not erased
523 */
524
525int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
526{
527 ulong cp, wp, data;
528 int i, l, rc;
529
530 wp = (addr & ~3); /* get lower word aligned address */
531
532 /*
533 * handle unaligned start bytes
534 */
535 if ((l = addr - wp) != 0) {
536 data = 0;
537 for (i = 0, cp = wp; i < l; ++i, ++cp) {
538 data = (data << 8) | (*(uchar *) cp);
539 }
540 for (; i < 4 && cnt > 0; ++i) {
541 data = (data << 8) | *src++;
542 --cnt;
543 ++cp;
544 }
545 for (; cnt == 0 && i < 4; ++i, ++cp) {
546 data = (data << 8) | (*(uchar *) cp);
547 }
548
549 if ((rc = write_word (info, wp, data)) != 0) {
550 return (rc);
551 }
552 wp += 4;
553 }
554
555 /*
556 * handle word aligned part
557 */
558 while (cnt >= 4) {
559 data = 0;
560 for (i = 0; i < 4; ++i) {
561 data = (data << 8) | *src++;
562 }
563 if ((rc = write_word (info, wp, data)) != 0) {
564 return (rc);
565 }
566 wp += 4;
567 cnt -= 4;
568 }
569
570 if (cnt == 0) {
571 return (0);
572 }
573
574 /*
575 * handle unaligned tail bytes
576 */
577 data = 0;
578 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
579 data = (data << 8) | *src++;
580 --cnt;
581 }
582 for (; i < 4; ++i, ++cp) {
583 data = (data << 8) | (*(uchar *) cp);
584 }
585
586 return (write_word (info, wp, data));
587}
588
589/*-----------------------------------------------------------------------
590 * Write a word to Flash, returns:
591 * 0 - OK
592 * 1 - write timeout
593 * 2 - Flash not erased
594 */
595static int write_word (flash_info_t * info, ulong dest, ulong data)
596{
597 volatile FLASH_WORD_SIZE *addr2 =
598 (FLASH_WORD_SIZE *) (info->start[0]);
599 volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
600 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
601 ulong start;
602 int i;
603
604 /* Check if Flash is (sufficiently) erased */
605 if ((*((volatile FLASH_WORD_SIZE *) dest) &
606 (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
607 return (2);
608 }
609
610 for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
611 int flag;
612
613 /* Disable interrupts which might cause a timeout here */
614 flag = disable_interrupts ();
615
616 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
617 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
618 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
619
620 dest2[i] = data2[i];
621
622 /* re-enable interrupts if necessary */
623 if (flag)
624 enable_interrupts ();
625
626 /* data polling for D7 */
627 start = get_timer (0);
628 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
629 (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
630
6d0f6bcf 631 if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
466b7410
WD		 632 return (1);
633 }
634 }
635 }
636
637 return (0);
638}
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