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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
27#ifndef CFG_ENV_ADDR
28#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
29#endif
30
31flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
32
33/*-----------------------------------------------------------------------
34 * Functions
35 */
36static ulong flash_get_size (vu_long *addr, flash_info_t *info);
37static int write_word (flash_info_t *info, ulong dest, ulong data);
38static void flash_get_offsets (ulong base, flash_info_t *info);
39
40/*-----------------------------------------------------------------------
41 */
42
43unsigned long flash_init (void)
44{
45 volatile immap_t *immap = (immap_t *)CFG_IMMR;
46 volatile memctl8xx_t *memctl = &immap->im_memctl;
47 unsigned long size_b0, size_b1;
48 int i;
49
50 /* Init: no FLASHes known */
51 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
52 flash_info[i].flash_id = FLASH_UNKNOWN;
53 }
54
55 /* Static FLASH Bank configuration here - FIXME XXX */
56
57 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
58
59 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
60 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
61 size_b0, size_b0<<20);
62 }
63
64 size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
65
66 if (size_b1 > size_b0) {
67 printf ("## ERROR: "
68 "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
69 size_b1, size_b1<<20,
70 size_b0, size_b0<<20
71 );
72 flash_info[0].flash_id = FLASH_UNKNOWN;
73 flash_info[1].flash_id = FLASH_UNKNOWN;
74 flash_info[0].sector_count = -1;
75 flash_info[1].sector_count = -1;
76 flash_info[0].size = 0;
77 flash_info[1].size = 0;
78 return (0);
79 }
80
81 /* Remap FLASH according to real size */
82 memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
83 memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
84
85 /* Re-do sizing to get full correct info */
86 size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
87
88 flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
89
90#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
91 /* monitor protection ON by default */
92 flash_protect(FLAG_PROTECT_SET,
93 CFG_MONITOR_BASE,
94 CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
95 &flash_info[0]);
96#endif
97
98#ifdef CFG_ENV_IS_IN_FLASH
99 /* ENV protection ON by default */
100 flash_protect(FLAG_PROTECT_SET,
101 CFG_ENV_ADDR,
102 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
103 &flash_info[0]);
104#endif
105
106 if (size_b1) {
107 memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
108 memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
109 BR_MS_GPCM | BR_V;
110
111 /* Re-do sizing to get full correct info */
112 size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
113 &flash_info[1]);
114
115 flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
116
117#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
118 /* monitor protection ON by default */
119 flash_protect(FLAG_PROTECT_SET,
120 CFG_MONITOR_BASE,
121 CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
122 &flash_info[1]);
123#endif
124
125#ifdef CFG_ENV_IS_IN_FLASH
126 /* ENV protection ON by default */
127 flash_protect(FLAG_PROTECT_SET,
128 CFG_ENV_ADDR,
129 CFG_ENV_ADDR+CFG_ENV_SIZE-1,
130 &flash_info[1]);
131#endif
132 } else {
133 memctl->memc_br1 = 0; /* invalidate bank */
134
135 flash_info[1].flash_id = FLASH_UNKNOWN;
136 flash_info[1].sector_count = -1;
137 }
138
139 flash_info[0].size = size_b0;
140 flash_info[1].size = size_b1;
141
142 return (size_b0 + size_b1);
143}
144
145/*-----------------------------------------------------------------------
146 */
147static void flash_get_offsets (ulong base, flash_info_t *info)
148{
149 int i;
150
151 /* set up sector start address table */
152 if (info->flash_id & FLASH_BTYPE) {
153 /* set sector offsets for bottom boot block type */
154 info->start[0] = base + 0x00000000;
155 info->start[1] = base + 0x00008000;
156 info->start[2] = base + 0x0000C000;
157 info->start[3] = base + 0x00010000;
158 for (i = 4; i < info->sector_count; i++) {
159 info->start[i] = base + (i * 0x00020000) - 0x00060000;
160 }
161 } else {
162 /* set sector offsets for top boot block type */
163 i = info->sector_count - 1;
164 info->start[i--] = base + info->size - 0x00008000;
165 info->start[i--] = base + info->size - 0x0000C000;
166 info->start[i--] = base + info->size - 0x00010000;
167 for (; i >= 0; i--) {
168 info->start[i] = base + i * 0x00020000;
169 }
170 }
171}
172
173/*-----------------------------------------------------------------------
174 */
175void flash_print_info (flash_info_t *info)
176{
177 int i;
178
179 if (info->flash_id == FLASH_UNKNOWN) {
180 printf ("missing or unknown FLASH type\n");
181 return;
182 }
183
184 switch (info->flash_id & FLASH_VENDMASK) {
185 case FLASH_MAN_AMD: printf ("AMD "); break;
186 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
187 default: printf ("Unknown Vendor "); break;
188 }
189
190 switch (info->flash_id & FLASH_TYPEMASK) {
191 case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
192 break;
193 case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
194 break;
195 case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
196 break;
197 case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
198 break;
199 case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
200 break;
201 case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
202 break;
203 case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
204 break;
205 case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
206 break;
207 default: printf ("Unknown Chip Type\n");
208 break;
209 }
210
211 printf (" Size: %ld MB in %d Sectors\n",
212 info->size >> 20, info->sector_count);
213
214 printf (" Sector Start Addresses:");
215 for (i=0; i<info->sector_count; ++i) {
216 if ((i % 5) == 0)
217 printf ("\n ");
218 printf (" %08lX%s",
219 info->start[i],
220 info->protect[i] ? " (RO)" : " "
221 );
222 }
223 printf ("\n");
224 return;
225}
226
227/*-----------------------------------------------------------------------
228 */
229
230
231/*-----------------------------------------------------------------------
232 */
233
234/*
235 * The following code cannot be run from FLASH!
236 */
237
238static ulong flash_get_size (vu_long *addr, flash_info_t *info)
239{
240 short i;
241 ulong value;
242 ulong base = (ulong)addr;
243
244 /* Write auto select command: read Manufacturer ID */
245 addr[0x0555] = 0x00AA00AA;
246 addr[0x02AA] = 0x00550055;
247 addr[0x0555] = 0x00900090;
248
249 value = addr[0];
250
251 switch (value) {
252 case AMD_MANUFACT:
253 info->flash_id = FLASH_MAN_AMD;
254 break;
255 case FUJ_MANUFACT:
256 info->flash_id = FLASH_MAN_FUJ;
257 break;
258 default:
259 info->flash_id = FLASH_UNKNOWN;
260 info->sector_count = 0;
261 info->size = 0;
262 return (0); /* no or unknown flash */
263 }
264
265 value = addr[1]; /* device ID */
266
267 switch (value) {
268 case AMD_ID_LV400T:
269 info->flash_id += FLASH_AM400T;
270 info->sector_count = 11;
271 info->size = 0x00100000;
272 break; /* => 1 MB */
273
274 case AMD_ID_LV400B:
275 info->flash_id += FLASH_AM400B;
276 info->sector_count = 11;
277 info->size = 0x00100000;
278 break; /* => 1 MB */
279
280 case AMD_ID_LV800T:
281 info->flash_id += FLASH_AM800T;
282 info->sector_count = 19;
283 info->size = 0x00200000;
284 break; /* => 2 MB */
285
286 case AMD_ID_LV800B:
287 info->flash_id += FLASH_AM800B;
288 info->sector_count = 19;
289 info->size = 0x00200000;
290 break; /* => 2 MB */
291
292 case AMD_ID_LV160T:
293 info->flash_id += FLASH_AM160T;
294 info->sector_count = 35;
295 info->size = 0x00400000;
296 break; /* => 4 MB */
297
298 case AMD_ID_LV160B:
299 info->flash_id += FLASH_AM160B;
300 info->sector_count = 35;
301 info->size = 0x00400000;
302 break; /* => 4 MB */
303#if 0 /* enable when device IDs are available */
304 case AMD_ID_LV320T:
305 info->flash_id += FLASH_AM320T;
306 info->sector_count = 67;
307 info->size = 0x00800000;
308 break; /* => 8 MB */
309
310 case AMD_ID_LV320B:
311 info->flash_id += FLASH_AM320B;
312 info->sector_count = 67;
313 info->size = 0x00800000;
314 break; /* => 8 MB */
315#endif
316 default:
317 info->flash_id = FLASH_UNKNOWN;
318 return (0); /* => no or unknown flash */
319 }
320
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
342 /* check for protected sectors */
343 for (i = 0; i < info->sector_count; i++) {
344 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
345 /* D0 = 1 if protected */
346 addr = (volatile unsigned long *)(info->start[i]);
347 info->protect[i] = addr[2] & 1;
348 }
349
350 /*
351 * Prevent writes to uninitialized FLASH.
352 */
353 if (info->flash_id != FLASH_UNKNOWN) {
354 addr = (volatile unsigned long *)info->start[0];
355
356 *addr = 0x00F000F0; /* reset bank */
357 }
358
359 return (info->size);
360}
361
362
363/*-----------------------------------------------------------------------
364 */
365
366int flash_erase (flash_info_t *info, int s_first, int s_last)
367{
368 vu_long *addr = (vu_long*)(info->start[0]);
369 int flag, prot, sect, l_sect;
370 ulong start, now, last;
371
372 if ((s_first < 0) || (s_first > s_last)) {
373 if (info->flash_id == FLASH_UNKNOWN) {
374 printf ("- missing\n");
375 } else {
376 printf ("- no sectors to erase\n");
377 }
378 return 1;
379 }
380
381 if ((info->flash_id == FLASH_UNKNOWN) ||
382 (info->flash_id > FLASH_AMD_COMP)) {
383 printf ("Can't erase unknown flash type %08lx - aborted\n",
384 info->flash_id);
385 return 1;
386 }
387
388 prot = 0;
389 for (sect=s_first; sect<=s_last; ++sect) {
390 if (info->protect[sect]) {
391 prot++;
392 }
393 }
394
395 if (prot) {
396 printf ("- Warning: %d protected sectors will not be erased!\n",
397 prot);
398 } else {
399 printf ("\n");
400 }
401
402 l_sect = -1;
403
404 /* Disable interrupts which might cause a timeout here */
405 flag = disable_interrupts();
406
407 addr[0x0555] = 0x00AA00AA;
408 addr[0x02AA] = 0x00550055;
409 addr[0x0555] = 0x00800080;
410 addr[0x0555] = 0x00AA00AA;
411 addr[0x02AA] = 0x00550055;
412
413 /* Start erase on unprotected sectors */
414 for (sect = s_first; sect<=s_last; sect++) {
415 if (info->protect[sect] == 0) { /* not protected */
416 addr = (vu_long*)(info->start[sect]);
417 addr[0] = 0x00300030;
418 l_sect = sect;
419 }
420 }
421
422 /* re-enable interrupts if necessary */
423 if (flag)
424 enable_interrupts();
425
426 /* wait at least 80us - let's wait 1 ms */
427 udelay (1000);
428
429 /*
430 * We wait for the last triggered sector
431 */
432 if (l_sect < 0)
433 goto DONE;
434
435 start = get_timer (0);
436 last = start;
437 addr = (vu_long*)(info->start[l_sect]);
438 while ((addr[0] & 0x00800080) != 0x00800080) {
439 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
440 printf ("Timeout\n");
441 return 1;
442 }
443 /* show that we're waiting */
444 if ((now - last) > 1000) { /* every second */
445 putc ('.');
446 last = now;
447 }
448 }
449
450DONE:
451 /* reset to read mode */
452 addr = (volatile unsigned long *)info->start[0];
453 addr[0] = 0x00F000F0; /* reset bank */
454
455 printf (" done\n");
456 return 0;
457}
458
459/*-----------------------------------------------------------------------
460 * Copy memory to flash, returns:
461 * 0 - OK
462 * 1 - write timeout
463 * 2 - Flash not erased
464 */
465
466int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
467{
468 ulong cp, wp, data;
469 int i, l, rc;
470
471 wp = (addr & ~3); /* get lower word aligned address */
472
473 /*
474 * handle unaligned start bytes
475 */
476 if ((l = addr - wp) != 0) {
477 data = 0;
478 for (i=0, cp=wp; i<l; ++i, ++cp) {
479 data = (data << 8) | (*(uchar *)cp);
480 }
481 for (; i<4 && cnt>0; ++i) {
482 data = (data << 8) | *src++;
483 --cnt;
484 ++cp;
485 }
486 for (; cnt==0 && i<4; ++i, ++cp) {
487 data = (data << 8) | (*(uchar *)cp);
488 }
489
490 if ((rc = write_word(info, wp, data)) != 0) {
491 return (rc);
492 }
493 wp += 4;
494 }
495
496 /*
497 * handle word aligned part
498 */
499 while (cnt >= 4) {
500 data = 0;
501 for (i=0; i<4; ++i) {
502 data = (data << 8) | *src++;
503 }
504 if ((rc = write_word(info, wp, data)) != 0) {
505 return (rc);
506 }
507 wp += 4;
508 cnt -= 4;
509 }
510
511 if (cnt == 0) {
512 return (0);
513 }
514
515 /*
516 * handle unaligned tail bytes
517 */
518 data = 0;
519 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
520 data = (data << 8) | *src++;
521 --cnt;
522 }
523 for (; i<4; ++i, ++cp) {
524 data = (data << 8) | (*(uchar *)cp);
525 }
526
527 return (write_word(info, wp, data));
528}
529
530/*-----------------------------------------------------------------------
531 * Write a word to Flash, returns:
532 * 0 - OK
533 * 1 - write timeout
534 * 2 - Flash not erased
535 */
536static int write_word (flash_info_t *info, ulong dest, ulong data)
537{
538 vu_long *addr = (vu_long*)(info->start[0]);
539 ulong start;
540 int flag;
541
542 /* Check if Flash is (sufficiently) erased */
543 if ((*((vu_long *)dest) & data) != data) {
544 return (2);
545 }
546 /* Disable interrupts which might cause a timeout here */
547 flag = disable_interrupts();
548
549 addr[0x0555] = 0x00AA00AA;
550 addr[0x02AA] = 0x00550055;
551 addr[0x0555] = 0x00A000A0;
552
553 *((vu_long *)dest) = data;
554
555 /* re-enable interrupts if necessary */
556 if (flag)
557 enable_interrupts();
558
559 /* data polling for D7 */
560 start = get_timer (0);
561 while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
562 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
563 return (1);
564 }
565 }
566 return (0);
567}
568
569/*-----------------------------------------------------------------------
570 */