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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. | |
4 | * | |
5 | * (C) Copyright 2002 | |
6 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
7 | * | |
8 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 of | |
14 | * the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <config.h> | |
28 | #include <common.h> | |
29 | #include <flash.h> | |
30 | #include <asm/io.h> | |
31 | ||
32 | /*---------------------------------------------------------------------*/ | |
33 | #undef DEBUG_FLASH | |
34 | ||
35 | #ifdef DEBUG_FLASH | |
36 | #define DEBUGF(fmt,args...) printf(fmt ,##args) | |
37 | #else | |
38 | #define DEBUGF(fmt,args...) | |
39 | #endif | |
40 | /*---------------------------------------------------------------------*/ | |
41 | ||
6d0f6bcf | 42 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
affae2bf WD |
43 | |
44 | static ulong flash_get_size (ulong addr, flash_info_t *info); | |
45 | static int flash_get_offsets (ulong base, flash_info_t *info); | |
46 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
47 | static void flash_reset (ulong addr); | |
48 | ||
49 | unsigned long flash_init (void) | |
50 | { | |
51 | unsigned int i; | |
52 | unsigned long flash_size = 0; | |
53 | ||
54 | /* Init: no FLASHes known */ | |
6d0f6bcf | 55 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
affae2bf WD |
56 | flash_info[i].flash_id = FLASH_UNKNOWN; |
57 | flash_info[i].sector_count = 0; | |
58 | flash_info[i].size = 0; | |
59 | } | |
60 | ||
6d0f6bcf | 61 | DEBUGF("\n## Get flash size @ 0x%08x\n", CONFIG_SYS_FLASH_BASE); |
affae2bf | 62 | |
6d0f6bcf | 63 | flash_size = flash_get_size (CONFIG_SYS_FLASH_BASE, flash_info); |
affae2bf WD |
64 | |
65 | DEBUGF("## Flash bank size: %08lx\n", flash_size); | |
66 | ||
67 | if (flash_size) { | |
6d0f6bcf JCPV |
68 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE && \ |
69 | CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_MAX_SIZE | |
affae2bf WD |
70 | /* monitor protection ON by default */ |
71 | flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
72 | CONFIG_SYS_MONITOR_BASE, |
73 | CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, | |
affae2bf WD |
74 | &flash_info[0]); |
75 | #endif | |
76 | ||
5a1aceb0 | 77 | #ifdef CONFIG_ENV_IS_IN_FLASH |
affae2bf WD |
78 | /* ENV protection ON by default */ |
79 | flash_protect(FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
80 | CONFIG_ENV_ADDR, |
81 | CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1, | |
affae2bf WD |
82 | &flash_info[0]); |
83 | #endif | |
84 | ||
85 | } else { | |
86 | puts ("Warning: the BOOT Flash is not initialised !"); | |
87 | } | |
88 | ||
89 | return flash_size; | |
90 | } | |
91 | ||
92 | /* | |
93 | * The following code cannot be run from FLASH! | |
94 | */ | |
95 | static ulong flash_get_size (ulong addr, flash_info_t *info) | |
96 | { | |
97 | short i; | |
98 | uchar value; | |
99 | ||
100 | /* Write auto select command: read Manufacturer ID */ | |
101 | out8(addr + 0x0555, 0xAA); | |
102 | iobarrier_rw(); | |
103 | out8(addr + 0x02AA, 0x55); | |
104 | iobarrier_rw(); | |
105 | out8(addr + 0x0555, 0x90); | |
106 | iobarrier_rw(); | |
107 | ||
108 | value = in8(addr); | |
109 | iobarrier_rw(); | |
110 | ||
111 | DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value); | |
112 | ||
113 | switch (value | (value << 16)) { | |
114 | case AMD_MANUFACT: | |
115 | info->flash_id = FLASH_MAN_AMD; | |
116 | break; | |
117 | ||
118 | case FUJ_MANUFACT: | |
119 | info->flash_id = FLASH_MAN_FUJ; | |
120 | break; | |
121 | ||
122 | case STM_MANUFACT: | |
123 | info->flash_id = FLASH_MAN_STM; | |
124 | break; | |
125 | ||
126 | default: | |
127 | info->flash_id = FLASH_UNKNOWN; | |
128 | info->sector_count = 0; | |
129 | info->size = 0; | |
130 | flash_reset (addr); | |
131 | return 0; | |
132 | } | |
133 | ||
134 | value = in8(addr + 1); /* device ID */ | |
135 | iobarrier_rw(); | |
136 | ||
137 | DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value); | |
138 | ||
77ddac94 | 139 | switch ((ulong)value) { |
affae2bf WD |
140 | case AMD_ID_F040B: |
141 | DEBUGF("Am29F040B\n"); | |
142 | info->flash_id += FLASH_AM040; | |
143 | info->sector_count = 8; | |
144 | info->size = 0x00080000; | |
145 | break; /* => 512 kB */ | |
146 | ||
147 | case AMD_ID_LV040B: | |
148 | DEBUGF("Am29LV040B\n"); | |
149 | info->flash_id += FLASH_AM040; | |
150 | info->sector_count = 8; | |
151 | info->size = 0x00080000; | |
152 | break; /* => 512 kB */ | |
153 | ||
154 | case AMD_ID_LV400T: | |
155 | DEBUGF("Am29LV400T\n"); | |
156 | info->flash_id += FLASH_AM400T; | |
157 | info->sector_count = 11; | |
158 | info->size = 0x00100000; | |
159 | break; /* => 1 MB */ | |
160 | ||
161 | case AMD_ID_LV400B: | |
162 | DEBUGF("Am29LV400B\n"); | |
163 | info->flash_id += FLASH_AM400B; | |
164 | info->sector_count = 11; | |
165 | info->size = 0x00100000; | |
166 | break; /* => 1 MB */ | |
167 | ||
168 | case AMD_ID_LV800T: | |
169 | DEBUGF("Am29LV800T\n"); | |
170 | info->flash_id += FLASH_AM800T; | |
171 | info->sector_count = 19; | |
172 | info->size = 0x00200000; | |
173 | break; /* => 2 MB */ | |
174 | ||
175 | case AMD_ID_LV800B: | |
176 | DEBUGF("Am29LV400B\n"); | |
177 | info->flash_id += FLASH_AM800B; | |
178 | info->sector_count = 19; | |
179 | info->size = 0x00200000; | |
180 | break; /* => 2 MB */ | |
181 | ||
182 | case AMD_ID_LV160T: | |
183 | DEBUGF("Am29LV160T\n"); | |
184 | info->flash_id += FLASH_AM160T; | |
185 | info->sector_count = 35; | |
186 | info->size = 0x00400000; | |
187 | break; /* => 4 MB */ | |
188 | ||
189 | case AMD_ID_LV160B: | |
190 | DEBUGF("Am29LV160B\n"); | |
191 | info->flash_id += FLASH_AM160B; | |
192 | info->sector_count = 35; | |
193 | info->size = 0x00400000; | |
194 | break; /* => 4 MB */ | |
195 | ||
196 | case AMD_ID_LV320T: | |
197 | DEBUGF("Am29LV320T\n"); | |
198 | info->flash_id += FLASH_AM320T; | |
199 | info->sector_count = 67; | |
200 | info->size = 0x00800000; | |
201 | break; /* => 8 MB */ | |
202 | ||
203 | #if 0 | |
204 | /* Has the same ID as AMD_ID_LV320T, to be fixed */ | |
205 | case AMD_ID_LV320B: | |
206 | DEBUGF("Am29LV320B\n"); | |
207 | info->flash_id += FLASH_AM320B; | |
208 | info->sector_count = 67; | |
209 | info->size = 0x00800000; | |
210 | break; /* => 8 MB */ | |
211 | #endif | |
212 | ||
213 | case AMD_ID_LV033C: | |
214 | DEBUGF("Am29LV033C\n"); | |
215 | info->flash_id += FLASH_AM033C; | |
216 | info->sector_count = 64; | |
217 | info->size = 0x01000000; | |
218 | break; /* => 16Mb */ | |
219 | ||
220 | case STM_ID_F040B: | |
221 | DEBUGF("M29F040B\n"); | |
222 | info->flash_id += FLASH_AM040; | |
223 | info->sector_count = 8; | |
224 | info->size = 0x00080000; | |
225 | break; /* => 512 kB */ | |
226 | ||
227 | default: | |
228 | info->flash_id = FLASH_UNKNOWN; | |
229 | flash_reset (addr); | |
230 | return (0); /* => no or unknown flash */ | |
231 | ||
232 | } | |
233 | ||
6d0f6bcf | 234 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
affae2bf | 235 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
236 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
237 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
affae2bf WD |
238 | } |
239 | ||
240 | if (! flash_get_offsets (addr, info)) { | |
241 | flash_reset (addr); | |
242 | return 0; | |
243 | } | |
244 | ||
245 | /* check for protected sectors */ | |
246 | for (i = 0; i < info->sector_count; i++) { | |
247 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
248 | /* D0 = 1 if protected */ | |
249 | value = in8(info->start[i] + 2); | |
250 | iobarrier_rw(); | |
251 | info->protect[i] = (value & 1) != 0; | |
252 | } | |
253 | ||
254 | /* | |
255 | * Reset bank to read mode | |
256 | */ | |
257 | flash_reset (addr); | |
258 | ||
259 | return (info->size); | |
260 | } | |
261 | ||
262 | static int flash_get_offsets (ulong base, flash_info_t *info) | |
263 | { | |
264 | unsigned int i; | |
265 | ||
266 | switch (info->flash_id & FLASH_TYPEMASK) { | |
267 | case FLASH_AM040: | |
268 | /* set sector offsets for uniform sector type */ | |
269 | for (i = 0; i < info->sector_count; i++) { | |
270 | info->start[i] = base + i * info->size / | |
271 | info->sector_count; | |
272 | } | |
273 | break; | |
274 | default: | |
275 | return 0; | |
276 | } | |
277 | ||
278 | return 1; | |
279 | } | |
280 | ||
281 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
282 | { | |
283 | volatile ulong addr = info->start[0]; | |
284 | int flag, prot, sect, l_sect; | |
285 | ulong start, now, last; | |
286 | ||
287 | if (s_first < 0 || s_first > s_last) { | |
288 | if (info->flash_id == FLASH_UNKNOWN) { | |
289 | printf ("- missing\n"); | |
290 | } else { | |
291 | printf ("- no sectors to erase\n"); | |
292 | } | |
293 | return 1; | |
294 | } | |
295 | ||
296 | if (info->flash_id == FLASH_UNKNOWN) { | |
297 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
298 | info->flash_id); | |
299 | return 1; | |
300 | } | |
301 | ||
302 | prot = 0; | |
303 | for (sect=s_first; sect<=s_last; ++sect) { | |
304 | if (info->protect[sect]) { | |
305 | prot++; | |
306 | } | |
307 | } | |
308 | ||
309 | if (prot) { | |
310 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
311 | prot); | |
312 | } else { | |
313 | printf ("\n"); | |
314 | } | |
315 | ||
316 | l_sect = -1; | |
317 | ||
318 | /* Disable interrupts which might cause a timeout here */ | |
319 | flag = disable_interrupts(); | |
320 | ||
321 | out8(addr + 0x555, 0xAA); | |
322 | iobarrier_rw(); | |
323 | out8(addr + 0x2AA, 0x55); | |
324 | iobarrier_rw(); | |
325 | out8(addr + 0x555, 0x80); | |
326 | iobarrier_rw(); | |
327 | out8(addr + 0x555, 0xAA); | |
328 | iobarrier_rw(); | |
329 | out8(addr + 0x2AA, 0x55); | |
330 | iobarrier_rw(); | |
331 | ||
332 | /* Start erase on unprotected sectors */ | |
333 | for (sect = s_first; sect<=s_last; sect++) { | |
334 | if (info->protect[sect] == 0) { /* not protected */ | |
335 | addr = info->start[sect]; | |
336 | out8(addr, 0x30); | |
337 | iobarrier_rw(); | |
338 | l_sect = sect; | |
339 | } | |
340 | } | |
341 | ||
342 | /* re-enable interrupts if necessary */ | |
343 | if (flag) | |
344 | enable_interrupts(); | |
345 | ||
346 | /* wait at least 80us - let's wait 1 ms */ | |
347 | udelay (1000); | |
348 | ||
349 | /* | |
350 | * We wait for the last triggered sector | |
351 | */ | |
352 | if (l_sect < 0) | |
353 | goto DONE; | |
354 | ||
355 | start = get_timer (0); | |
356 | last = start; | |
357 | addr = info->start[l_sect]; | |
358 | ||
6d0f6bcf | 359 | DEBUGF ("Start erase timeout: %d\n", CONFIG_SYS_FLASH_ERASE_TOUT); |
affae2bf WD |
360 | |
361 | while ((in8(addr) & 0x80) != 0x80) { | |
6d0f6bcf | 362 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
affae2bf WD |
363 | printf ("Timeout\n"); |
364 | flash_reset (info->start[0]); | |
365 | return 1; | |
366 | } | |
367 | /* show that we're waiting */ | |
368 | if ((now - last) > 1000) { /* every second */ | |
369 | putc ('.'); | |
370 | last = now; | |
371 | } | |
372 | iobarrier_rw(); | |
373 | } | |
374 | ||
375 | DONE: | |
376 | /* reset to read mode */ | |
377 | flash_reset (info->start[0]); | |
378 | ||
379 | printf (" done\n"); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* | |
384 | * Copy memory to flash, returns: | |
385 | * 0 - OK | |
386 | * 1 - write timeout | |
387 | * 2 - Flash not erased | |
388 | */ | |
389 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
390 | { | |
391 | ulong cp, wp, data; | |
392 | int i, l, rc; | |
393 | ||
394 | wp = (addr & ~3); /* get lower word aligned address */ | |
395 | ||
396 | /* | |
397 | * handle unaligned start bytes | |
398 | */ | |
399 | if ((l = addr - wp) != 0) { | |
400 | data = 0; | |
401 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
402 | data = (data << 8) | (*(uchar *)cp); | |
403 | } | |
404 | for (; i<4 && cnt>0; ++i) { | |
405 | data = (data << 8) | *src++; | |
406 | --cnt; | |
407 | ++cp; | |
408 | } | |
409 | for (; cnt==0 && i<4; ++i, ++cp) { | |
410 | data = (data << 8) | (*(uchar *)cp); | |
411 | } | |
412 | ||
413 | if ((rc = write_word(info, wp, data)) != 0) { | |
414 | return (rc); | |
415 | } | |
416 | wp += 4; | |
417 | } | |
418 | ||
419 | /* | |
420 | * handle word aligned part | |
421 | */ | |
422 | while (cnt >= 4) { | |
423 | data = 0; | |
424 | for (i=0; i<4; ++i) { | |
425 | data = (data << 8) | *src++; | |
426 | } | |
427 | if ((rc = write_word(info, wp, data)) != 0) { | |
428 | return (rc); | |
429 | } | |
430 | wp += 4; | |
431 | cnt -= 4; | |
432 | } | |
433 | ||
434 | if (cnt == 0) { | |
435 | return (0); | |
436 | } | |
437 | ||
438 | /* | |
439 | * handle unaligned tail bytes | |
440 | */ | |
441 | data = 0; | |
442 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
443 | data = (data << 8) | *src++; | |
444 | --cnt; | |
445 | } | |
446 | for (; i<4; ++i, ++cp) { | |
447 | data = (data << 8) | (*(uchar *)cp); | |
448 | } | |
449 | ||
450 | return (write_word(info, wp, data)); | |
451 | } | |
452 | ||
453 | /* | |
454 | * Write a word to Flash, returns: | |
455 | * 0 - OK | |
456 | * 1 - write timeout | |
457 | * 2 - Flash not erased | |
458 | */ | |
459 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
460 | { | |
461 | volatile ulong addr = info->start[0]; | |
462 | ulong start; | |
463 | int i; | |
464 | ||
465 | /* Check if Flash is (sufficiently) erased */ | |
466 | if ((in32(dest) & data) != data) { | |
467 | return (2); | |
468 | } | |
469 | ||
470 | /* write each byte out */ | |
471 | for (i = 0; i < 4; i++) { | |
472 | char *data_ch = (char *)&data; | |
473 | int flag = disable_interrupts(); | |
474 | ||
475 | out8(addr + 0x555, 0xAA); | |
476 | iobarrier_rw(); | |
477 | out8(addr + 0x2AA, 0x55); | |
478 | iobarrier_rw(); | |
479 | out8(addr + 0x555, 0xA0); | |
480 | iobarrier_rw(); | |
481 | out8(dest+i, data_ch[i]); | |
482 | iobarrier_rw(); | |
483 | ||
484 | /* re-enable interrupts if necessary */ | |
485 | if (flag) | |
486 | enable_interrupts(); | |
487 | ||
488 | /* data polling for D7 */ | |
489 | start = get_timer (0); | |
490 | while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) { | |
6d0f6bcf | 491 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
affae2bf WD |
492 | flash_reset (addr); |
493 | return (1); | |
494 | } | |
495 | iobarrier_rw(); | |
496 | } | |
497 | } | |
498 | ||
499 | flash_reset (addr); | |
500 | return (0); | |
501 | } | |
502 | ||
503 | /* | |
504 | * Reset bank to read mode | |
505 | */ | |
506 | static void flash_reset (ulong addr) | |
507 | { | |
508 | out8(addr, 0xF0); /* reset bank */ | |
509 | iobarrier_rw(); | |
510 | } | |
511 | ||
512 | void flash_print_info (flash_info_t *info) | |
513 | { | |
514 | int i; | |
515 | ||
516 | if (info->flash_id == FLASH_UNKNOWN) { | |
517 | printf ("missing or unknown FLASH type\n"); | |
518 | return; | |
519 | } | |
520 | ||
521 | switch (info->flash_id & FLASH_VENDMASK) { | |
522 | case FLASH_MAN_AMD: printf ("AMD "); break; | |
523 | case FLASH_MAN_FUJ: printf ("FUJITSU "); break; | |
524 | case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; | |
525 | case FLASH_MAN_STM: printf ("SGS THOMSON "); break; | |
526 | default: printf ("Unknown Vendor "); break; | |
527 | } | |
528 | ||
529 | switch (info->flash_id & FLASH_TYPEMASK) { | |
530 | case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n"); | |
531 | break; | |
532 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); | |
533 | break; | |
534 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); | |
535 | break; | |
536 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); | |
537 | break; | |
538 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); | |
539 | break; | |
540 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); | |
541 | break; | |
542 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); | |
543 | break; | |
544 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); | |
545 | break; | |
546 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); | |
547 | break; | |
548 | default: printf ("Unknown Chip Type\n"); | |
549 | break; | |
550 | } | |
551 | ||
552 | if (info->size % 0x100000 == 0) { | |
553 | printf (" Size: %ld MB in %d Sectors\n", | |
554 | info->size / 0x100000, info->sector_count); | |
555 | } else if (info->size % 0x400 == 0) { | |
556 | printf (" Size: %ld KB in %d Sectors\n", | |
557 | info->size / 0x400, info->sector_count); | |
558 | } else { | |
559 | printf (" Size: %ld B in %d Sectors\n", | |
560 | info->size, info->sector_count); | |
561 | } | |
562 | ||
563 | printf (" Sector Start Addresses:"); | |
564 | for (i=0; i<info->sector_count; ++i) { | |
565 | if ((i % 5) == 0) | |
566 | printf ("\n "); | |
567 | printf (" %08lX%s", | |
568 | info->start[i], | |
569 | info->protect[i] ? " (RO)" : " " | |
570 | ); | |
571 | } | |
572 | printf ("\n"); | |
573 | } |