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1 | /* | |
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 | #include <flash.h> | |
27 | ||
28 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ | |
29 | ||
30 | /*----------------------------------------------------------------------- | |
31 | * Functions | |
32 | */ | |
33 | ulong flash_recognize (vu_long *base); | |
34 | int write_word (flash_info_t *info, ulong dest, ulong data); | |
35 | void flash_get_geometry (vu_long *base, flash_info_t *info); | |
36 | void flash_unprotect(flash_info_t *info); | |
37 | int _flash_real_protect(flash_info_t *info, long idx, int on); | |
38 | ||
39 | ||
40 | unsigned long flash_init (void) | |
41 | { | |
42 | volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; | |
43 | volatile memctl8xx_t *memctl = &immap->im_memctl; | |
44 | int i; | |
45 | int rec; | |
46 | ||
47 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { | |
48 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
49 | } | |
50 | ||
51 | *((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff; | |
52 | ||
53 | flash_get_geometry ((vu_long*)CONFIG_SYS_FLASH_BASE, &flash_info[0]); | |
54 | ||
55 | /* Remap FLASH according to real size */ | |
56 | memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-flash_info[0].size & 0xFFFF8000); | |
57 | memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | | |
58 | (memctl->memc_br0 & ~(BR_BA_MSK)); | |
59 | ||
60 | rec = flash_recognize((vu_long*)CONFIG_SYS_FLASH_BASE); | |
61 | ||
62 | if (rec == FLASH_UNKNOWN) { | |
63 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
64 | flash_info[0].size, flash_info[0].size<<20); | |
65 | } | |
66 | ||
67 | #if CONFIG_SYS_FLASH_PROTECTION | |
68 | /*Unprotect all the flash memory*/ | |
69 | flash_unprotect(&flash_info[0]); | |
70 | #endif | |
71 | ||
72 | *((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff; | |
73 | ||
74 | return (flash_info[0].size); | |
75 | ||
76 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE | |
77 | /* monitor protection ON by default */ | |
78 | flash_protect(FLAG_PROTECT_SET, | |
79 | CONFIG_SYS_MONITOR_BASE, | |
80 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
81 | &flash_info[0]); | |
82 | #endif | |
83 | ||
84 | #ifdef CONFIG_ENV_IS_IN_FLASH | |
85 | /* ENV protection ON by default */ | |
86 | flash_protect(FLAG_PROTECT_SET, | |
87 | CONFIG_ENV_OFFSET, | |
88 | CONFIG_ENV_OFFSET+CONFIG_ENV_SIZE-1, | |
89 | &flash_info[0]); | |
90 | #endif | |
91 | return (flash_info[0].size); | |
92 | } | |
93 | ||
94 | ||
95 | int flash_get_protect_status(flash_info_t * info, long idx) | |
96 | { | |
97 | vu_short * base; | |
98 | ushort res; | |
99 | ||
100 | #ifdef DEBUG | |
101 | printf("\n Attempting to set protection info with %d sectors\n", info->sector_count); | |
102 | #endif | |
103 | ||
104 | ||
105 | base = (vu_short*)info->start[idx]; | |
106 | ||
107 | *(base) = 0xffff; | |
108 | ||
109 | *(base + 0x55) = 0x0098; | |
110 | res = base[0x2]; | |
111 | ||
112 | *(base) = 0xffff; | |
113 | ||
114 | if(res != 0) | |
115 | res = 1; | |
116 | else | |
117 | res = 0; | |
118 | ||
119 | return res; | |
120 | } | |
121 | ||
122 | void flash_get_geometry (vu_long *base, flash_info_t *info) | |
123 | { | |
124 | int i,j; | |
125 | ulong ner = 0; | |
126 | vu_short * sb = (vu_short*)base; | |
127 | ulong offset = (ulong)base; | |
128 | ||
129 | /* Read Device geometry */ | |
130 | ||
131 | *sb = 0xffff; | |
132 | ||
133 | *sb = 0x0090; | |
134 | ||
135 | info->flash_id = ((ulong)base[0x0]); | |
136 | #ifdef DEBUG | |
137 | printf("Id is %x\n", (uint)(ulong)info->flash_id); | |
138 | #endif | |
139 | ||
140 | *sb = 0xffff; | |
141 | ||
142 | *(sb+0x55) = 0x0098; | |
143 | ||
144 | info->size = 1 << (sb[0x27]); /* Read flash size */ | |
145 | ||
146 | #ifdef DEBUG | |
147 | printf("Size is %x\n", (uint)(ulong)info->size); | |
148 | #endif | |
149 | ||
150 | *sb = 0xffff; | |
151 | ||
152 | *(sb + 0x55) = 0x0098; | |
153 | ner = sb[0x2c] ; /*Number of erase regions*/ | |
154 | ||
155 | #ifdef DEBUG | |
156 | printf("Number of erase regions %x\n", (uint)ner); | |
157 | #endif | |
158 | ||
159 | info->sector_count = 0; | |
160 | ||
161 | for(i = 0; i < ner; i++) | |
162 | { | |
163 | uint s; | |
164 | uint count; | |
165 | uint t1,t2,t3,t4; | |
166 | ||
167 | *sb = 0xffff; | |
168 | ||
169 | *(sb + 0x55) = 0x0098; | |
170 | ||
171 | t1 = sb[0x2d + i*4]; | |
172 | t2 = sb[0x2e + i*4]; | |
173 | t3 = sb[0x2f + i*4]; | |
174 | t4 = sb[0x30 + i*4]; | |
175 | ||
176 | count = ((t1 & 0x00ff) | (((t2 & 0x00ff) << 8) & 0xff00) )+ 1; /*sector count*/ | |
177 | s = ((t3 & 0x00ff) | (((t4 & 0x00ff) << 8) & 0xff00)) * 256;; /*Sector size*/ | |
178 | ||
179 | #ifdef DEBUG | |
180 | printf("count and size %x, %x\n", count, s); | |
181 | printf("sector count for erase region %d is %d\n", i, count); | |
182 | #endif | |
183 | for(j = 0; j < count; j++) | |
184 | { | |
185 | #ifdef DEBUG | |
186 | printf("%x, ", (uint)offset); | |
187 | #endif | |
188 | info->start[ info->sector_count + j] = offset; | |
189 | offset += s; | |
190 | } | |
191 | info->sector_count += count; | |
192 | } | |
193 | ||
194 | if ((offset - (ulong)base) != info->size) | |
195 | printf("WARNING reported size %x does not match to calculted size %x.\n" | |
196 | , (uint)info->size, (uint)(offset - (ulong)base) ); | |
197 | ||
198 | /* Next check if there are any sectors protected.*/ | |
199 | ||
200 | for(i = 0; i < info->sector_count; i++) | |
201 | info->protect[i] = flash_get_protect_status(info, i); | |
202 | ||
203 | *sb = 0xffff; | |
204 | } | |
205 | ||
206 | /*----------------------------------------------------------------------- | |
207 | */ | |
208 | void flash_print_info (flash_info_t *info) | |
209 | { | |
210 | int i; | |
211 | ||
212 | if (info->flash_id == FLASH_UNKNOWN) { | |
213 | printf ("missing or unknown FLASH type\n"); | |
214 | return ; | |
215 | } | |
216 | ||
217 | switch (info->flash_id & FLASH_VENDMASK) { | |
218 | case INTEL_MANUFACT & FLASH_VENDMASK: | |
219 | printf ("Intel "); | |
220 | break; | |
221 | default: | |
222 | printf ("Unknown Vendor "); | |
223 | break; | |
224 | } | |
225 | ||
226 | switch (info->flash_id & FLASH_TYPEMASK) { | |
227 | case INTEL_ID_28F320C3B & FLASH_TYPEMASK: | |
228 | printf ("28F320RC3(4 MB)\n"); | |
229 | break; | |
230 | case INTEL_ID_28F320J3A: | |
231 | printf("28F320J3A (4 MB)\n"); | |
232 | break; | |
233 | default: | |
234 | printf ("Unknown Chip Type\n"); | |
235 | break; | |
236 | } | |
237 | ||
238 | printf (" Size: %ld MB in %d Sectors\n", | |
239 | info->size >> 20, info->sector_count); | |
240 | ||
241 | printf (" Sector Start Addresses:"); | |
242 | for (i=0; i<info->sector_count; ++i) { | |
243 | if ((i % 4) == 0) | |
244 | printf ("\n "); | |
245 | printf (" %02d %08lX%s", | |
246 | i, info->start[i], | |
247 | info->protect[i]!=0 ? " (RO)" : " " | |
248 | ); | |
249 | } | |
250 | printf ("\n"); | |
251 | return ; | |
252 | } | |
253 | ||
254 | ulong flash_recognize (vu_long *base) | |
255 | { | |
256 | ulong id; | |
257 | ulong res = FLASH_UNKNOWN; | |
258 | vu_short * sb = (vu_short*)base; | |
259 | ||
260 | *sb = 0xffff; | |
261 | ||
262 | *sb = 0x0090; | |
263 | id = base[0]; | |
264 | ||
265 | switch (id & 0x00FF0000) | |
266 | { | |
267 | case (MT_MANUFACT & 0x00FF0000): /* MT or => Intel */ | |
268 | case (INTEL_ALT_MANU & 0x00FF0000): | |
269 | res = FLASH_MAN_INTEL; | |
270 | break; | |
271 | default: | |
272 | res = FLASH_UNKNOWN; | |
273 | } | |
274 | ||
275 | *sb = 0xffff; | |
276 | ||
277 | return res; | |
278 | } | |
279 | ||
280 | /*-----------------------------------------------------------------------*/ | |
281 | #define INTEL_FLASH_STATUS_BLS 0x02 | |
282 | #define INTEL_FLASH_STATUS_PSS 0x04 | |
283 | #define INTEL_FLASH_STATUS_VPPS 0x08 | |
284 | #define INTEL_FLASH_STATUS_PS 0x10 | |
285 | #define INTEL_FLASH_STATUS_ES 0x20 | |
286 | #define INTEL_FLASH_STATUS_ESS 0x40 | |
287 | #define INTEL_FLASH_STATUS_WSMS 0x80 | |
288 | ||
289 | int flash_decode_status_bits(char status) | |
290 | { | |
291 | int err = 0; | |
292 | ||
293 | if(!(status & INTEL_FLASH_STATUS_WSMS)) { | |
294 | printf("Busy\n"); | |
295 | err = -1; | |
296 | } | |
297 | ||
298 | if(status & INTEL_FLASH_STATUS_ESS) { | |
299 | printf("Erase suspended\n"); | |
300 | err = -1; | |
301 | } | |
302 | ||
303 | if(status & INTEL_FLASH_STATUS_ES) { | |
304 | printf("Error in block erase\n"); | |
305 | err = -1; | |
306 | } | |
307 | ||
308 | if(status & INTEL_FLASH_STATUS_PS) { | |
309 | printf("Error in programming\n"); | |
310 | err = -1; | |
311 | } | |
312 | ||
313 | if(status & INTEL_FLASH_STATUS_VPPS) { | |
314 | printf("Vpp low, operation aborted\n"); | |
315 | err = -1; | |
316 | } | |
317 | ||
318 | if(status & INTEL_FLASH_STATUS_PSS) { | |
319 | printf("Program is suspended\n"); | |
320 | err = -1; | |
321 | } | |
322 | ||
323 | if(status & INTEL_FLASH_STATUS_BLS) { | |
324 | printf("Attempting to program/erase a locked sector\n"); | |
325 | err = -1; | |
326 | } | |
327 | ||
328 | if((status & INTEL_FLASH_STATUS_PS) && | |
329 | (status & INTEL_FLASH_STATUS_ES) && | |
330 | (status & INTEL_FLASH_STATUS_ESS)) { | |
331 | printf("A command sequence error\n"); | |
332 | return -1; | |
333 | } | |
334 | ||
335 | return err; | |
336 | } | |
337 | ||
338 | /*----------------------------------------------------------------------- | |
339 | */ | |
340 | ||
341 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
342 | { | |
343 | vu_short *addr; | |
344 | int flag, prot, sect; | |
345 | ulong start, now; | |
346 | int rcode = 0; | |
347 | ||
348 | if ((s_first < 0) || (s_first > s_last)) { | |
349 | if (info->flash_id == FLASH_UNKNOWN) { | |
350 | printf ("- missing\n"); | |
351 | } else { | |
352 | printf ("- no sectors to erase\n"); | |
353 | } | |
354 | return 1; | |
355 | } | |
356 | ||
357 | if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) { | |
358 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
359 | info->flash_id); | |
360 | return 1; | |
361 | } | |
362 | ||
363 | prot = 0; | |
364 | for (sect=s_first; sect<=s_last; ++sect) { | |
365 | if (info->protect[sect]) { | |
366 | prot++; | |
367 | } | |
368 | } | |
369 | ||
370 | if (prot) { | |
371 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
372 | prot); | |
373 | } else { | |
374 | printf ("\n"); | |
375 | } | |
376 | ||
377 | start = get_timer (0); | |
378 | ||
379 | /* Start erase on unprotected sectors */ | |
380 | for (sect = s_first; sect<=s_last; sect++) { | |
381 | char tmp; | |
382 | ||
383 | if (info->protect[sect] == 0) { /* not protected */ | |
384 | addr = (vu_short *)(info->start[sect]); | |
385 | ||
386 | /* Disable interrupts which might cause a timeout here */ | |
387 | flag = disable_interrupts(); | |
388 | ||
389 | /* Single Block Erase Command */ | |
390 | *addr = 0x0020; | |
391 | /* Confirm */ | |
392 | *addr = 0x00D0; | |
393 | /* Resume Command, as per errata update */ | |
394 | *addr = 0x00D0; | |
395 | ||
396 | /* re-enable interrupts if necessary */ | |
397 | if (flag) | |
398 | enable_interrupts(); | |
399 | ||
400 | *addr = 0x70; /*Read status register command*/ | |
401 | tmp = (short)*addr & 0x00FF; /* Read the status */ | |
402 | while (!(tmp & INTEL_FLASH_STATUS_WSMS)) { | |
403 | if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { | |
404 | *addr = 0x0050; /* Reset the status register */ | |
405 | *addr = 0xffff; | |
406 | printf ("Timeout\n"); | |
407 | return 1; | |
408 | } | |
409 | /* show that we're waiting */ | |
410 | if ((now - start) > 1000) { /* every second */ | |
411 | putc ('.'); | |
412 | } | |
413 | udelay(100000); /* 100 ms */ | |
414 | *addr = 0x0070; /*Read status register command*/ | |
415 | tmp = (short)*addr & 0x00FF; /* Read status */ | |
416 | start = get_timer(0); | |
417 | } | |
418 | if( tmp & INTEL_FLASH_STATUS_ES ) | |
419 | flash_decode_status_bits(tmp); | |
420 | ||
421 | *addr = 0x0050; /* Reset the status register */ | |
422 | *addr = 0xffff; /* Reset to read mode */ | |
423 | } | |
424 | } | |
425 | ||
426 | ||
427 | printf (" done\n"); | |
428 | return rcode; | |
429 | } | |
430 | ||
431 | void flash_unprotect (flash_info_t *info) | |
432 | { | |
433 | /*We can only unprotect the whole flash at once*/ | |
434 | /*Therefore we must prevent the _flash_real_protect()*/ | |
435 | /*from re-protecting sectors, that ware protected before */ | |
436 | /*we called flash_real_protect();*/ | |
437 | ||
438 | int i; | |
439 | ||
440 | for(i = 0; i < info->sector_count; i++) | |
441 | info->protect[i] = 0; | |
442 | ||
443 | #ifdef CONFIG_SYS_FLASH_PROTECTION | |
444 | _flash_real_protect(info, 0, 0); | |
445 | #endif | |
446 | } | |
447 | ||
448 | /*----------------------------------------------------------------------- | |
449 | * Copy memory to flash, returns: | |
450 | * 0 - OK | |
451 | * 1 - write timeout | |
452 | * 2 - Flash not erased | |
453 | */ | |
454 | ||
455 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
456 | { | |
457 | ulong cp, wp, data; | |
458 | int i, l, rc; | |
459 | ||
460 | wp = (addr & ~3); /* get lower word aligned address */ | |
461 | ||
462 | /* | |
463 | * handle unaligned start bytes | |
464 | */ | |
465 | if ((l = addr - wp) != 0) { | |
466 | data = 0; | |
467 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
468 | data = (data << 8) | (*(uchar *)cp); | |
469 | } | |
470 | for (; i<4 && cnt>0; ++i) { | |
471 | data = (data << 8) | *src++; | |
472 | --cnt; | |
473 | ++cp; | |
474 | } | |
475 | for (; cnt==0 && i<4; ++i, ++cp) { | |
476 | data = (data << 8) | (*(uchar *)cp); | |
477 | } | |
478 | ||
479 | if ((rc = write_word(info, wp, data)) != 0) { | |
480 | return (rc); | |
481 | } | |
482 | wp += 4; | |
483 | } | |
484 | ||
485 | /* | |
486 | * handle word aligned part | |
487 | */ | |
488 | while (cnt >= 4) { | |
489 | data = 0; | |
490 | for (i=0; i<4; ++i) { | |
491 | data = (data << 8) | *src++; | |
492 | } | |
493 | if ((rc = write_word(info, wp, data)) != 0) { | |
494 | return (rc); | |
495 | } | |
496 | wp += 4; | |
497 | cnt -= 4; | |
498 | } | |
499 | ||
500 | if (cnt == 0) { | |
501 | return (0); | |
502 | } | |
503 | ||
504 | /* | |
505 | * handle unaligned tail bytes | |
506 | */ | |
507 | data = 0; | |
508 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
509 | data = (data << 8) | *src++; | |
510 | --cnt; | |
511 | } | |
512 | for (; i<4; ++i, ++cp) { | |
513 | data = (data << 8) | (*(uchar *)cp); | |
514 | } | |
515 | ||
516 | return (write_word(info, wp, data)); | |
517 | } | |
518 | ||
519 | /*----------------------------------------------------------------------- | |
520 | * Write a word to Flash, returns: | |
521 | * 0 - OK | |
522 | * 1 - write timeout | |
523 | * 2 - Flash not erased | |
524 | */ | |
525 | int write_word (flash_info_t *info, ulong dest, ulong da) | |
526 | { | |
527 | vu_short *addr = (vu_short *)dest; | |
528 | ulong start; | |
529 | char csr; | |
530 | int flag; | |
531 | ushort * d = (ushort*)&da; | |
532 | int i; | |
533 | ||
534 | /* Check if Flash is (sufficiently) erased */ | |
535 | if (((*addr & d[0]) != d[0]) || ((*(addr+1) & d[1]) != d[1])) { | |
536 | return (2); | |
537 | } | |
538 | /* Disable interrupts which might cause a timeout here */ | |
539 | flag = disable_interrupts(); | |
540 | ||
541 | for(i = 0; i < 2; i++) | |
542 | { | |
543 | /* Write Command */ | |
544 | *addr = 0x0010; | |
545 | ||
546 | /* Write Data */ | |
547 | *addr = d[i]; | |
548 | ||
549 | /* re-enable interrupts if necessary */ | |
550 | if (flag) | |
551 | enable_interrupts(); | |
552 | ||
553 | /* data polling for D7 */ | |
554 | start = get_timer (0); | |
555 | flag = 0; | |
556 | *addr = 0x0070; /*Read statusregister command */ | |
557 | while (((csr = *addr) & INTEL_FLASH_STATUS_WSMS)!=INTEL_FLASH_STATUS_WSMS) { | |
558 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { | |
559 | flag = 1; | |
560 | break; | |
561 | } | |
562 | *addr = 0x0070; /*Read statusregister command */ | |
563 | } | |
564 | if (csr & INTEL_FLASH_STATUS_PSS) { | |
565 | printf ("CSR indicates write error (%0x) at %08lx\n", | |
566 | csr, (ulong)addr); | |
567 | flag = 1; | |
568 | } | |
569 | ||
570 | /* Clear Status Registers Command */ | |
571 | *addr = 0x0050; | |
572 | /* Reset to read array mode */ | |
573 | *addr = 0xffff; | |
574 | addr++; | |
575 | } | |
576 | ||
577 | return (flag); | |
578 | } | |
579 | ||
580 | int flash_real_protect(flash_info_t *info, long offset, int prot) | |
581 | { | |
582 | int i, idx; | |
583 | ||
584 | for(idx = 0; idx < info->sector_count; idx++) | |
585 | if(info->start[idx] == offset) | |
586 | break; | |
587 | ||
588 | if(idx==info->sector_count) | |
589 | return -1; | |
590 | ||
591 | if(prot == 0) { | |
592 | /* Unprotect one sector, which means unprotect all flash | |
593 | * and reprotect the other protected sectors. | |
594 | */ | |
595 | _flash_real_protect(info, 0, 0); /* Unprotects the whole flash*/ | |
596 | info->protect[idx] = 0; | |
597 | ||
598 | for(i = 0; i < info->sector_count; i++) | |
599 | if(info->protect[i]) | |
600 | _flash_real_protect(info, i, 1); | |
601 | } | |
602 | else { | |
603 | /* We can protect individual sectors */ | |
604 | _flash_real_protect(info, idx, 1); | |
605 | } | |
606 | ||
607 | for( i = 0; i < info->sector_count; i++) | |
608 | info->protect[i] = flash_get_protect_status(info, i); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | int _flash_real_protect(flash_info_t *info, long idx, int prot) | |
614 | { | |
615 | vu_short *addr; | |
616 | int flag; | |
617 | ushort cmd; | |
618 | ushort tmp; | |
619 | ulong now, start; | |
620 | ||
621 | if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) { | |
622 | printf ("Can't change protection for unknown flash type %08lx - aborted\n", | |
623 | info->flash_id); | |
624 | return -1; | |
625 | } | |
626 | ||
627 | if(prot == 0) { | |
628 | /*Unlock the sector*/ | |
629 | cmd = 0x00D0; | |
630 | } | |
631 | else { | |
632 | /*Lock the sector*/ | |
633 | cmd = 0x0001; | |
634 | } | |
635 | ||
636 | addr = (vu_short *)(info->start[idx]); | |
637 | ||
638 | /* If chip is busy, wait for it */ | |
639 | start = get_timer(0); | |
640 | *addr = 0x0070; /*Read status register command*/ | |
641 | tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/ | |
642 | while(!(tmp & INTEL_FLASH_STATUS_WSMS)) { | |
643 | /*Write State Machine Busy*/ | |
644 | /*Wait untill done or timeout.*/ | |
645 | if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) { | |
646 | *addr = 0x0050; /* Reset the status register */ | |
647 | *addr = 0xffff; /* Reset the chip */ | |
648 | printf ("TTimeout\n"); | |
649 | return 1; | |
650 | } | |
651 | *addr = 0x0070; | |
652 | tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/ | |
653 | start = get_timer(0); | |
654 | } | |
655 | ||
656 | /* Disable interrupts which might cause a timeout here */ | |
657 | flag = disable_interrupts(); | |
658 | ||
659 | /* Unlock block*/ | |
660 | *addr = 0x0060; | |
661 | ||
662 | *addr = cmd; | |
663 | ||
664 | /* re-enable interrupts if necessary */ | |
665 | if (flag) | |
666 | enable_interrupts(); | |
667 | ||
668 | start = get_timer(0); | |
669 | *addr = 0x0070; /*Read status register command*/ | |
670 | tmp = ((ushort)(*addr)) & 0x00FF; /* Read the status */ | |
671 | while (!(tmp & INTEL_FLASH_STATUS_WSMS)) { | |
672 | /* Write State Machine Busy */ | |
673 | if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) { | |
674 | *addr = 0x0050; /* Reset the status register */ | |
675 | *addr = 0xffff; | |
676 | printf ("Timeout\n"); | |
677 | return 1; | |
678 | } | |
679 | /* show that we're waiting */ | |
680 | if ((now - start) > 1000) { /* every second */ | |
681 | putc ('.'); | |
682 | } | |
683 | udelay(100000); /* 100 ms */ | |
684 | *addr = 0x70; /*Read status register command*/ | |
685 | tmp = (short)*addr & 0x00FF; /* Read status */ | |
686 | start = get_timer(0); | |
687 | } | |
688 | if( tmp & INTEL_FLASH_STATUS_PS ) | |
689 | flash_decode_status_bits(tmp); | |
690 | ||
691 | *addr =0x0050; /*Clear status register*/ | |
692 | ||
693 | /* reset to read mode */ | |
694 | *addr = 0xffff; | |
695 | ||
696 | return 0; | |
697 | } |