]>
Commit | Line | Data |
---|---|---|
affae2bf WD |
1 | /* |
2 | * (C) Copyright 2000 | |
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 | ||
6d0f6bcf | 27 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
affae2bf WD |
28 | |
29 | /*----------------------------------------------------------------------- | |
30 | * Functions | |
31 | */ | |
32 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); | |
33 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
34 | static void flash_get_offsets (ulong base, flash_info_t *info); | |
35 | ||
36 | /*----------------------------------------------------------------------- | |
37 | * Protection Flags: | |
38 | */ | |
39 | #define FLAG_PROTECT_SET 0x01 | |
40 | #define FLAG_PROTECT_CLEAR 0x02 | |
41 | ||
42 | /*----------------------------------------------------------------------- | |
43 | */ | |
44 | ||
45 | unsigned long flash_init (void) | |
46 | { | |
6d0f6bcf | 47 | volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; |
affae2bf WD |
48 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
49 | unsigned long size_b0, size_b1; | |
50 | int i; | |
51 | ||
52 | /*printf("faking");*/ | |
53 | ||
54 | return(0x1fffff); | |
55 | ||
56 | /* Init: no FLASHes known */ | |
6d0f6bcf | 57 | for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) |
affae2bf WD |
58 | { |
59 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
60 | } | |
61 | ||
62 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
63 | ||
64 | size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); | |
65 | ||
66 | if (flash_info[0].flash_id == FLASH_UNKNOWN) | |
67 | { | |
68 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
69 | size_b0, size_b0<<20); | |
70 | } | |
71 | ||
72 | #if 0 | |
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) > Bank 0 (0x%08lx = %ld MB)\n", | |
53677ef1 | 78 | size_b1, size_b1<<20,size_b0, size_b0<<20); |
affae2bf WD |
79 | |
80 | flash_info[0].flash_id = FLASH_UNKNOWN; | |
81 | flash_info[1].flash_id = FLASH_UNKNOWN; | |
82 | flash_info[0].sector_count = -1; | |
83 | flash_info[1].sector_count = -1; | |
84 | flash_info[0].size = 0; | |
85 | flash_info[1].size = 0; | |
86 | return (0); | |
87 | } | |
88 | } else { | |
89 | #endif | |
90 | size_b1 = 0; | |
91 | ||
92 | /* Remap FLASH according to real size */ | |
6d0f6bcf JCPV |
93 | memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM; |
94 | memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM; | |
affae2bf WD |
95 | |
96 | /* Re-do sizing to get full correct info */ | |
6d0f6bcf | 97 | size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf | 98 | |
6d0f6bcf | 99 | flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf | 100 | |
6d0f6bcf | 101 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE |
affae2bf WD |
102 | /* monitor protection ON by default */ |
103 | (void)flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
104 | CONFIG_SYS_MONITOR_BASE, |
105 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
affae2bf WD |
106 | &flash_info[0]); |
107 | #endif | |
108 | ||
109 | if (size_b1) | |
110 | { | |
6d0f6bcf JCPV |
111 | /* memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM; |
112 | memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM; */ | |
affae2bf WD |
113 | |
114 | /* Re-do sizing to get full correct info */ | |
6d0f6bcf | 115 | size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + size_b0), |
affae2bf WD |
116 | &flash_info[1]); |
117 | ||
6d0f6bcf | 118 | flash_get_offsets (CONFIG_SYS_FLASH_BASE + size_b0, &flash_info[1]); |
affae2bf | 119 | |
6d0f6bcf | 120 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE |
affae2bf WD |
121 | /* monitor protection ON by default */ |
122 | (void)flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
123 | CONFIG_SYS_MONITOR_BASE, |
124 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
affae2bf WD |
125 | &flash_info[1]); |
126 | #endif | |
127 | } | |
128 | else | |
129 | { | |
6d0f6bcf JCPV |
130 | /* memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM; |
131 | FIXME memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM; */ | |
affae2bf WD |
132 | |
133 | flash_info[1].flash_id = FLASH_UNKNOWN; | |
134 | flash_info[1].sector_count = -1; | |
135 | } | |
136 | ||
137 | flash_info[0].size = size_b0; | |
138 | flash_info[1].size = size_b1; | |
139 | ||
140 | return (size_b0 + size_b1); | |
141 | } | |
142 | ||
143 | ||
144 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
145 | { | |
146 | int i; | |
147 | ||
148 | /* set up sector start adress table */ | |
149 | if (info->flash_id & FLASH_BTYPE) | |
150 | { | |
151 | /* set sector offsets for bottom boot block type */ | |
152 | for (i = 0; i < info->sector_count; i++) | |
153 | { | |
154 | info->start[i] = base + (i * 0x00040000); | |
155 | } | |
156 | } | |
157 | else | |
158 | { | |
159 | /* set sector offsets for top boot block type */ | |
160 | i = info->sector_count - 1; | |
161 | for (; i >= 0; i--) | |
162 | { | |
163 | info->start[i] = base + i * 0x00040000; | |
164 | } | |
165 | } | |
166 | ||
167 | } | |
168 | ||
169 | /*----------------------------------------------------------------------- | |
170 | */ | |
171 | void flash_print_info (flash_info_t *info) | |
172 | { | |
173 | int i; | |
174 | ||
175 | if (info->flash_id == FLASH_UNKNOWN) { | |
176 | printf ("missing or unknown FLASH type\n"); | |
177 | return; | |
178 | } | |
179 | ||
180 | switch (info->flash_id & FLASH_VENDMASK) { | |
181 | case FLASH_MAN_AMD: printf ("AMD "); break; | |
182 | case FLASH_MAN_FUJ: printf ("FUJITSU "); break; | |
183 | default: printf ("Unknown Vendor "); break; | |
184 | } | |
185 | ||
186 | switch (info->flash_id & FLASH_TYPEMASK) { | |
187 | ||
188 | #if 0 | |
189 | case FLASH_AM040B: | |
190 | printf ("AM29F040B (4 Mbit, bottom boot sect)\n"); | |
191 | break; | |
192 | case FLASH_AM040T: | |
193 | printf ("AM29F040T (4 Mbit, top boot sect)\n"); | |
194 | break; | |
195 | #endif | |
196 | case FLASH_AM400B: | |
197 | printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); | |
198 | break; | |
199 | case FLASH_AM400T: | |
200 | printf ("AM29LV400T (4 Mbit, top boot sector)\n"); | |
201 | break; | |
202 | case FLASH_AM800B: | |
203 | printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); | |
204 | break; | |
205 | case FLASH_AM800T: | |
206 | printf ("AM29LV800T (8 Mbit, top boot sector)\n"); | |
207 | break; | |
208 | case FLASH_AM160B: | |
209 | printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); | |
210 | break; | |
211 | case FLASH_AM160T: | |
212 | printf ("AM29LV160T (16 Mbit, top boot sector)\n"); | |
213 | break; | |
214 | case FLASH_AM320B: | |
215 | printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); | |
216 | break; | |
217 | case FLASH_AM320T: | |
218 | printf ("AM29LV320T (32 Mbit, top boot sector)\n"); | |
219 | break; | |
220 | default: | |
221 | printf ("Unknown Chip Type\n"); | |
222 | break; | |
223 | } | |
224 | ||
225 | printf (" Size: %ld MB in %d Sectors\n", | |
226 | info->size >> 20, | |
227 | info->sector_count); | |
228 | ||
229 | printf (" Sector Start Addresses:"); | |
230 | ||
231 | for (i=0; i<info->sector_count; ++i) | |
232 | { | |
233 | if ((i % 5) == 0) | |
234 | { | |
235 | printf ("\n "); | |
236 | } | |
237 | ||
238 | printf (" %08lX%s", | |
239 | info->start[i], | |
240 | info->protect[i] ? " (RO)" : " "); | |
241 | } | |
242 | ||
243 | printf ("\n"); | |
244 | return; | |
245 | } | |
246 | ||
247 | /*----------------------------------------------------------------------- | |
248 | */ | |
249 | ||
250 | ||
251 | /*----------------------------------------------------------------------- | |
252 | */ | |
253 | ||
254 | /* | |
255 | * The following code cannot be run from FLASH! | |
256 | */ | |
257 | ||
258 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
259 | { | |
260 | short i; | |
261 | #if 0 | |
262 | ulong base = (ulong)addr; | |
263 | #endif | |
77ddac94 | 264 | ulong value; |
affae2bf WD |
265 | |
266 | /* Write auto select command: read Manufacturer ID */ | |
267 | #if 0 | |
268 | addr[0x0555] = 0x00AA00AA; | |
269 | addr[0x02AA] = 0x00550055; | |
270 | addr[0x0555] = 0x00900090; | |
271 | #else | |
272 | addr[0x0555] = 0xAAAAAAAA; | |
273 | addr[0x02AA] = 0x55555555; | |
274 | addr[0x0555] = 0x90909090; | |
275 | #endif | |
276 | ||
277 | value = addr[0]; | |
278 | ||
279 | switch (value) | |
280 | { | |
77ddac94 | 281 | case AMD_MANUFACT: |
affae2bf WD |
282 | info->flash_id = FLASH_MAN_AMD; |
283 | break; | |
284 | ||
285 | case FUJ_MANUFACT: | |
286 | info->flash_id = FLASH_MAN_FUJ; | |
287 | break; | |
288 | ||
289 | default: | |
290 | info->flash_id = FLASH_UNKNOWN; | |
291 | info->sector_count = 0; | |
292 | info->size = 0; | |
293 | break; | |
294 | } | |
295 | ||
296 | value = addr[1]; /* device ID */ | |
297 | ||
298 | switch (value) | |
299 | { | |
300 | #if 0 | |
301 | case AMD_ID_F040B: | |
302 | info->flash_id += FLASH_AM040B; | |
303 | info->sector_count = 8; | |
304 | info->size = 0x00200000; | |
305 | break; /* => 2 MB */ | |
306 | #endif | |
307 | case AMD_ID_LV400T: | |
308 | info->flash_id += FLASH_AM400T; | |
309 | info->sector_count = 11; | |
310 | info->size = 0x00100000; | |
311 | break; /* => 1 MB */ | |
312 | ||
313 | case AMD_ID_LV400B: | |
314 | info->flash_id += FLASH_AM400B; | |
315 | info->sector_count = 11; | |
316 | info->size = 0x00100000; | |
317 | break; /* => 1 MB */ | |
318 | ||
319 | case AMD_ID_LV800T: | |
320 | info->flash_id += FLASH_AM800T; | |
321 | info->sector_count = 19; | |
322 | info->size = 0x00200000; | |
323 | break; /* => 2 MB */ | |
324 | ||
325 | case AMD_ID_LV800B: | |
326 | info->flash_id += FLASH_AM800B; | |
327 | info->sector_count = 19; | |
328 | info->size = 0x00200000; | |
329 | break; /* => 2 MB */ | |
330 | ||
331 | case AMD_ID_LV160T: | |
332 | info->flash_id += FLASH_AM160T; | |
333 | info->sector_count = 35; | |
334 | info->size = 0x00400000; | |
335 | break; /* => 4 MB */ | |
336 | ||
337 | case AMD_ID_LV160B: | |
338 | info->flash_id += FLASH_AM160B; | |
339 | info->sector_count = 35; | |
340 | info->size = 0x00400000; | |
341 | break; /* => 4 MB */ | |
342 | #if 0 /* enable when device IDs are available */ | |
343 | case AMD_ID_LV320T: | |
344 | info->flash_id += FLASH_AM320T; | |
345 | info->sector_count = 67; | |
346 | info->size = 0x00800000; | |
347 | break; /* => 8 MB */ | |
348 | ||
349 | case AMD_ID_LV320B: | |
350 | info->flash_id += FLASH_AM320B; | |
351 | info->sector_count = 67; | |
352 | info->size = 0x00800000; | |
353 | break; /* => 8 MB */ | |
354 | #endif | |
355 | default: | |
356 | info->flash_id = FLASH_UNKNOWN; | |
357 | return (0); /* => no or unknown flash */ | |
358 | ||
359 | } | |
360 | ||
361 | #if 0 | |
362 | /* set up sector start adress table */ | |
363 | if (info->flash_id & FLASH_BTYPE) { | |
364 | /* set sector offsets for bottom boot block type */ | |
365 | info->start[0] = base + 0x00000000; | |
366 | info->start[1] = base + 0x00008000; | |
367 | info->start[2] = base + 0x0000C000; | |
368 | info->start[3] = base + 0x00010000; | |
369 | for (i = 4; i < info->sector_count; i++) { | |
370 | info->start[i] = base + (i * 0x00020000) - 0x00060000; | |
371 | } | |
372 | } else { | |
373 | /* set sector offsets for top boot block type */ | |
374 | i = info->sector_count - 1; | |
375 | info->start[i--] = base + info->size - 0x00008000; | |
376 | info->start[i--] = base + info->size - 0x0000C000; | |
377 | info->start[i--] = base + info->size - 0x00010000; | |
378 | for (; i >= 0; i--) { | |
379 | info->start[i] = base + i * 0x00020000; | |
380 | } | |
381 | } | |
382 | #else | |
383 | flash_get_offsets ((ulong)addr, &flash_info[0]); | |
384 | #endif | |
385 | ||
386 | /* check for protected sectors */ | |
387 | for (i = 0; i < info->sector_count; i++) | |
388 | { | |
389 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
390 | /* D0 = 1 if protected */ | |
391 | addr = (volatile unsigned long *)(info->start[i]); | |
392 | info->protect[i] = addr[2] & 1; | |
393 | } | |
394 | ||
395 | /* | |
396 | * Prevent writes to uninitialized FLASH. | |
397 | */ | |
398 | if (info->flash_id != FLASH_UNKNOWN) | |
399 | { | |
400 | addr = (volatile unsigned long *)info->start[0]; | |
401 | #if 0 | |
402 | *addr = 0x00F000F0; /* reset bank */ | |
403 | #else | |
404 | *addr = 0xF0F0F0F0; /* reset bank */ | |
405 | #endif | |
406 | } | |
407 | ||
408 | return (info->size); | |
409 | } | |
410 | ||
411 | ||
412 | /*----------------------------------------------------------------------- | |
413 | */ | |
414 | ||
415 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
416 | { | |
417 | vu_long *addr = (vu_long*)(info->start[0]); | |
418 | int flag, prot, sect, l_sect; | |
419 | ulong start, now, last; | |
420 | ||
421 | if ((s_first < 0) || (s_first > s_last)) { | |
422 | if (info->flash_id == FLASH_UNKNOWN) { | |
423 | printf ("- missing\n"); | |
424 | } else { | |
425 | printf ("- no sectors to erase\n"); | |
426 | } | |
427 | return 1; | |
428 | } | |
429 | ||
430 | if ((info->flash_id == FLASH_UNKNOWN) || | |
431 | (info->flash_id > FLASH_AMD_COMP)) { | |
432 | printf ("Can't erase unknown flash type - aborted\n"); | |
433 | return 1; | |
434 | } | |
435 | ||
436 | prot = 0; | |
437 | for (sect=s_first; sect<=s_last; ++sect) { | |
438 | if (info->protect[sect]) { | |
439 | prot++; | |
440 | } | |
441 | } | |
442 | ||
443 | if (prot) { | |
444 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
445 | prot); | |
446 | } else { | |
447 | printf ("\n"); | |
448 | } | |
449 | ||
450 | l_sect = -1; | |
451 | ||
452 | /* Disable interrupts which might cause a timeout here */ | |
453 | flag = disable_interrupts(); | |
454 | ||
455 | #if 0 | |
456 | addr[0x0555] = 0x00AA00AA; | |
457 | addr[0x02AA] = 0x00550055; | |
458 | addr[0x0555] = 0x00800080; | |
459 | addr[0x0555] = 0x00AA00AA; | |
460 | addr[0x02AA] = 0x00550055; | |
461 | #else | |
462 | addr[0x0555] = 0xAAAAAAAA; | |
463 | addr[0x02AA] = 0x55555555; | |
464 | addr[0x0555] = 0x80808080; | |
465 | addr[0x0555] = 0xAAAAAAAA; | |
466 | addr[0x02AA] = 0x55555555; | |
467 | #endif | |
468 | ||
469 | /* Start erase on unprotected sectors */ | |
470 | for (sect = s_first; sect<=s_last; sect++) { | |
471 | if (info->protect[sect] == 0) { /* not protected */ | |
472 | addr = (vu_long*)(info->start[sect]); | |
473 | #if 0 | |
474 | addr[0] = 0x00300030; | |
475 | #else | |
476 | addr[0] = 0x30303030; | |
477 | #endif | |
478 | l_sect = sect; | |
479 | } | |
480 | } | |
481 | ||
482 | /* re-enable interrupts if necessary */ | |
483 | if (flag) | |
484 | enable_interrupts(); | |
485 | ||
486 | /* wait at least 80us - let's wait 1 ms */ | |
487 | udelay (1000); | |
488 | ||
489 | /* | |
490 | * We wait for the last triggered sector | |
491 | */ | |
492 | if (l_sect < 0) | |
493 | goto DONE; | |
494 | ||
495 | start = get_timer (0); | |
496 | last = start; | |
497 | addr = (vu_long*)(info->start[l_sect]); | |
498 | #if 0 | |
499 | while ((addr[0] & 0x00800080) != 0x00800080) | |
500 | #else | |
501 | while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF) | |
502 | #endif | |
503 | { | |
6d0f6bcf | 504 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
affae2bf WD |
505 | printf ("Timeout\n"); |
506 | return 1; | |
507 | } | |
508 | /* show that we're waiting */ | |
509 | if ((now - last) > 1000) { /* every second */ | |
510 | putc ('.'); | |
511 | last = now; | |
512 | } | |
513 | } | |
514 | ||
515 | DONE: | |
516 | /* reset to read mode */ | |
517 | addr = (volatile unsigned long *)info->start[0]; | |
518 | #if 0 | |
519 | addr[0] = 0x00F000F0; /* reset bank */ | |
520 | #else | |
521 | addr[0] = 0xF0F0F0F0; /* reset bank */ | |
522 | #endif | |
523 | ||
524 | printf (" done\n"); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | /*----------------------------------------------------------------------- | |
529 | * Copy memory to flash, returns: | |
530 | * 0 - OK | |
531 | * 1 - write timeout | |
532 | * 2 - Flash not erased | |
533 | */ | |
534 | ||
535 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
536 | { | |
537 | ulong cp, wp, data; | |
538 | int i, l, rc; | |
539 | ||
540 | wp = (addr & ~3); /* get lower word aligned address */ | |
541 | ||
542 | /* | |
543 | * handle unaligned start bytes | |
544 | */ | |
545 | if ((l = addr - wp) != 0) { | |
546 | data = 0; | |
547 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
548 | data = (data << 8) | (*(uchar *)cp); | |
549 | } | |
550 | for (; i<4 && cnt>0; ++i) { | |
551 | data = (data << 8) | *src++; | |
552 | --cnt; | |
553 | ++cp; | |
554 | } | |
555 | for (; cnt==0 && i<4; ++i, ++cp) { | |
556 | data = (data << 8) | (*(uchar *)cp); | |
557 | } | |
558 | ||
559 | if ((rc = write_word(info, wp, data)) != 0) { | |
560 | return (rc); | |
561 | } | |
562 | wp += 4; | |
563 | } | |
564 | ||
565 | /* | |
566 | * handle word aligned part | |
567 | */ | |
568 | while (cnt >= 4) { | |
569 | data = 0; | |
570 | for (i=0; i<4; ++i) { | |
571 | data = (data << 8) | *src++; | |
572 | } | |
573 | if ((rc = write_word(info, wp, data)) != 0) { | |
574 | return (rc); | |
575 | } | |
576 | wp += 4; | |
577 | cnt -= 4; | |
578 | } | |
579 | ||
580 | if (cnt == 0) { | |
581 | return (0); | |
582 | } | |
583 | ||
584 | /* | |
585 | * handle unaligned tail bytes | |
586 | */ | |
587 | data = 0; | |
588 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
589 | data = (data << 8) | *src++; | |
590 | --cnt; | |
591 | } | |
592 | for (; i<4; ++i, ++cp) { | |
593 | data = (data << 8) | (*(uchar *)cp); | |
594 | } | |
595 | ||
596 | return (write_word(info, wp, data)); | |
597 | } | |
598 | /*----------------------------------------------------------------------- | |
599 | * Write a word to Flash, returns: | |
600 | * 0 - OK | |
601 | * 1 - write timeout | |
602 | * 2 - Flash not erased | |
603 | */ | |
604 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
605 | { | |
606 | vu_long *addr = (vu_long*)(info->start[0]); | |
607 | ulong start; | |
608 | int flag; | |
609 | ||
610 | /* Check if Flash is (sufficiently) erased */ | |
611 | if ((*((vu_long *)dest) & data) != data) { | |
612 | return (2); | |
613 | } | |
614 | /* Disable interrupts which might cause a timeout here */ | |
615 | flag = disable_interrupts(); | |
616 | ||
617 | #if 0 | |
618 | addr[0x0555] = 0x00AA00AA; | |
619 | addr[0x02AA] = 0x00550055; | |
620 | addr[0x0555] = 0x00A000A0; | |
621 | #else | |
622 | addr[0x0555] = 0xAAAAAAAA; | |
623 | addr[0x02AA] = 0x55555555; | |
624 | addr[0x0555] = 0xA0A0A0A0; | |
625 | #endif | |
626 | ||
627 | *((vu_long *)dest) = data; | |
628 | ||
629 | /* re-enable interrupts if necessary */ | |
630 | if (flag) | |
631 | enable_interrupts(); | |
632 | ||
633 | /* data polling for D7 */ | |
634 | start = get_timer (0); | |
635 | #if 0 | |
636 | while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) | |
637 | #else | |
638 | while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) | |
639 | #endif | |
640 | { | |
6d0f6bcf | 641 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
affae2bf WD |
642 | return (1); |
643 | } | |
644 | } | |
645 | return (0); | |
646 | } | |
647 | ||
648 | /*----------------------------------------------------------------------- | |
649 | */ |