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ba56f625 WD |
1 | /* |
2 | * (C) Copyright 2002-2004 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2002 Jun Gu <jung@artesyncp.com> | |
6 | * Add support for Am29F016D and dynamic switch setting. | |
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 | /* | |
28 | * Modified 4/5/2001 | |
29 | * Wait for completion of each sector erase command issued | |
30 | * 4/5/2001 | |
31 | * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com | |
32 | */ | |
33 | ||
34 | /* | |
35 | * Ported to XPedite1000, 1/2 mb boot flash only | |
36 | * Travis B. Sawyer, <travis.sawyer@sandburst.com> | |
37 | */ | |
38 | ||
39 | #include <common.h> | |
40 | #include <ppc4xx.h> | |
41 | #include <asm/processor.h> | |
42 | ||
43 | ||
44 | #undef DEBUG | |
45 | #ifdef DEBUG | |
46 | #define DEBUGF(x...) printf(x) | |
47 | #else | |
48 | #define DEBUGF(x...) | |
49 | #endif /* DEBUG */ | |
50 | ||
51 | #define BOOT_SMALL_FLASH 32 /* 00100000 */ | |
52 | #define FLASH_ONBD_N 2 /* 00000010 */ | |
53 | #define FLASH_SRAM_SEL 1 /* 00000001 */ | |
54 | ||
55 | #define BOOT_SMALL_FLASH_VAL 4 | |
56 | #define FLASH_ONBD_N_VAL 2 | |
57 | #define FLASH_SRAM_SEL_VAL 1 | |
58 | ||
59 | ||
6d0f6bcf | 60 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
ba56f625 | 61 | |
6d0f6bcf | 62 | static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = { |
ba56f625 WD |
63 | {0xfff80000}, /* 0:000: configuraton 3 */ |
64 | {0xfff90000}, /* 1:001: configuraton 4 */ | |
65 | {0xfffa0000}, /* 2:010: configuraton 7 */ | |
66 | {0xfffb0000}, /* 3:011: configuraton 8 */ | |
67 | {0xfffc0000}, /* 4:100: configuraton 1 */ | |
68 | {0xfffd0000}, /* 5:101: configuraton 2 */ | |
69 | {0xfffe0000}, /* 6:110: configuraton 5 */ | |
70 | {0xffff0000} /* 7:111: configuraton 6 */ | |
71 | }; | |
72 | ||
73 | /*----------------------------------------------------------------------- | |
74 | * Functions | |
75 | */ | |
76 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); | |
77 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
78 | ||
79 | ||
80 | #ifdef CONFIG_XPEDITE1K | |
81 | #define ADDR0 0x5555 | |
82 | #define ADDR1 0x2aaa | |
83 | #define FLASH_WORD_SIZE unsigned char | |
84 | #endif | |
85 | ||
86 | /*----------------------------------------------------------------------- | |
87 | */ | |
88 | ||
89 | unsigned long flash_init (void) | |
90 | { | |
91 | unsigned long total_b = 0; | |
6d0f6bcf | 92 | unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS]; |
ba56f625 WD |
93 | unsigned short index = 0; |
94 | int i; | |
95 | ||
96 | ||
97 | DEBUGF("\n"); | |
98 | DEBUGF("FLASH: Index: %d\n", index); | |
99 | ||
100 | /* Init: no FLASHes known */ | |
6d0f6bcf | 101 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
ba56f625 WD |
102 | flash_info[i].flash_id = FLASH_UNKNOWN; |
103 | flash_info[i].sector_count = -1; | |
104 | flash_info[i].size = 0; | |
105 | ||
106 | /* check whether the address is 0 */ | |
107 | if (flash_addr_table[index][i] == 0) { | |
108 | continue; | |
109 | } | |
110 | ||
111 | /* call flash_get_size() to initialize sector address */ | |
112 | size_b[i] = flash_get_size( | |
113 | (vu_long *)flash_addr_table[index][i], &flash_info[i]); | |
114 | flash_info[i].size = size_b[i]; | |
115 | if (flash_info[i].flash_id == FLASH_UNKNOWN) { | |
116 | printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", | |
117 | i, size_b[i], size_b[i]<<20); | |
118 | flash_info[i].sector_count = -1; | |
119 | flash_info[i].size = 0; | |
120 | } | |
121 | ||
122 | total_b += flash_info[i].size; | |
123 | } | |
124 | ||
125 | return total_b; | |
126 | } | |
127 | ||
128 | ||
129 | /*----------------------------------------------------------------------- | |
130 | */ | |
131 | void flash_print_info (flash_info_t *info) | |
132 | { | |
133 | int i; | |
134 | int k; | |
135 | int size; | |
136 | int erased; | |
137 | volatile unsigned long *flash; | |
138 | ||
139 | if (info->flash_id == FLASH_UNKNOWN) { | |
140 | printf ("missing or unknown FLASH type\n"); | |
141 | return; | |
142 | } | |
143 | ||
144 | switch (info->flash_id & FLASH_VENDMASK) { | |
145 | case FLASH_MAN_AMD: printf ("AMD "); break; | |
146 | case FLASH_MAN_FUJ: printf ("FUJITSU "); break; | |
147 | case FLASH_MAN_SST: printf ("SST "); break; | |
148 | default: printf ("Unknown Vendor "); break; | |
149 | } | |
150 | ||
151 | switch (info->flash_id & FLASH_TYPEMASK) { | |
152 | case FLASH_AMD016: printf ("AM29F016D (16 Mbit, uniform sector size)\n"); | |
153 | break; | |
154 | case FLASH_AM040: printf ("AM29F040 (512 Kbit, uniform sector size)\n"); | |
155 | break; | |
156 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); | |
157 | break; | |
158 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); | |
159 | break; | |
160 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); | |
161 | break; | |
162 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); | |
163 | break; | |
164 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); | |
165 | break; | |
166 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); | |
167 | break; | |
168 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); | |
169 | break; | |
170 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); | |
171 | break; | |
172 | case FLASH_SST800A: printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n"); | |
173 | break; | |
174 | case FLASH_SST160A: printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n"); | |
175 | break; | |
176 | default: printf ("Unknown Chip Type\n"); | |
177 | break; | |
178 | } | |
179 | ||
180 | printf (" Size: %ld KB in %d Sectors\n", | |
181 | info->size >> 10, info->sector_count); | |
182 | ||
183 | printf (" Sector Start Addresses:"); | |
184 | for (i=0; i<info->sector_count; ++i) { | |
185 | /* | |
186 | * Check if whole sector is erased | |
187 | */ | |
188 | if (i != (info->sector_count-1)) | |
189 | size = info->start[i+1] - info->start[i]; | |
190 | else | |
191 | size = info->start[0] + info->size - info->start[i]; | |
192 | erased = 1; | |
193 | flash = (volatile unsigned long *)info->start[i]; | |
194 | size = size >> 2; /* divide by 4 for longword access */ | |
195 | for (k=0; k<size; k++) | |
196 | { | |
197 | if (*flash++ != 0xffffffff) | |
198 | { | |
199 | erased = 0; | |
200 | break; | |
201 | } | |
202 | } | |
203 | ||
204 | if ((i % 5) == 0) | |
205 | printf ("\n "); | |
206 | printf (" %08lX%s%s", | |
207 | info->start[i], | |
208 | erased ? " E" : " ", | |
209 | info->protect[i] ? "RO " : " " | |
210 | ); | |
211 | } | |
212 | printf ("\n"); | |
213 | return; | |
214 | } | |
215 | ||
216 | /*----------------------------------------------------------------------- | |
217 | */ | |
218 | ||
219 | ||
220 | /*----------------------------------------------------------------------- | |
221 | */ | |
222 | ||
223 | /* | |
224 | * The following code cannot be run from FLASH! | |
225 | */ | |
226 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
227 | { | |
228 | short i; | |
229 | FLASH_WORD_SIZE value; | |
230 | ulong base = (ulong)addr; | |
231 | volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr; | |
232 | ||
233 | DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr ); | |
234 | ||
235 | /* Write auto select command: read Manufacturer ID */ | |
236 | udelay(10000); | |
237 | addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; | |
238 | udelay(1000); | |
239 | addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055; | |
240 | udelay(1000); | |
241 | addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090; | |
242 | udelay(1000); | |
243 | ||
244 | #ifdef CONFIG_ADCIOP | |
245 | value = addr2[2]; | |
246 | #else | |
247 | value = addr2[0]; | |
248 | #endif | |
249 | ||
250 | DEBUGF("FLASH MANUFACT: %x\n", value); | |
251 | ||
252 | switch (value) { | |
253 | case (FLASH_WORD_SIZE)AMD_MANUFACT: | |
254 | info->flash_id = FLASH_MAN_AMD; | |
255 | break; | |
256 | case (FLASH_WORD_SIZE)FUJ_MANUFACT: | |
257 | info->flash_id = FLASH_MAN_FUJ; | |
258 | break; | |
259 | case (FLASH_WORD_SIZE)SST_MANUFACT: | |
260 | info->flash_id = FLASH_MAN_SST; | |
261 | break; | |
262 | case (FLASH_WORD_SIZE)STM_MANUFACT: | |
263 | info->flash_id = FLASH_MAN_STM; | |
264 | break; | |
265 | default: | |
266 | info->flash_id = FLASH_UNKNOWN; | |
267 | info->sector_count = 0; | |
268 | info->size = 0; | |
269 | return (0); /* no or unknown flash */ | |
270 | } | |
271 | ||
272 | #ifdef CONFIG_ADCIOP | |
273 | value = addr2[0]; /* device ID */ | |
274 | debug ("\ndev_code=%x\n", value); | |
275 | #else | |
276 | value = addr2[1]; /* device ID */ | |
277 | #endif | |
278 | ||
279 | DEBUGF("\nFLASH DEVICEID: %x\n", value); | |
280 | ||
281 | switch (value) { | |
282 | case (FLASH_WORD_SIZE)AMD_ID_LV040B: | |
283 | info->flash_id += FLASH_AM040; | |
284 | info->sector_count = 8; | |
285 | info->size = 0x00080000; /* => 512 kb */ | |
286 | break; | |
287 | ||
288 | default: | |
289 | info->flash_id = FLASH_UNKNOWN; | |
290 | return (0); /* => no or unknown flash */ | |
291 | ||
292 | } | |
293 | ||
294 | /* set up sector start address table */ | |
295 | if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) || | |
296 | (info->flash_id == FLASH_AM040) || | |
297 | (info->flash_id == FLASH_AMD016)) { | |
298 | for (i = 0; i < info->sector_count; i++) | |
299 | info->start[i] = base + (i * 0x00010000); | |
300 | } else { | |
301 | if (info->flash_id & FLASH_BTYPE) { | |
302 | /* set sector offsets for bottom boot block type */ | |
303 | info->start[0] = base + 0x00000000; | |
304 | info->start[1] = base + 0x00004000; | |
305 | info->start[2] = base + 0x00006000; | |
306 | info->start[3] = base + 0x00008000; | |
307 | for (i = 4; i < info->sector_count; i++) { | |
308 | info->start[i] = base + (i * 0x00010000) - 0x00030000; | |
309 | } | |
310 | } else { | |
311 | /* set sector offsets for top boot block type */ | |
312 | i = info->sector_count - 1; | |
313 | info->start[i--] = base + info->size - 0x00004000; | |
314 | info->start[i--] = base + info->size - 0x00006000; | |
315 | info->start[i--] = base + info->size - 0x00008000; | |
316 | for (; i >= 0; i--) { | |
317 | info->start[i] = base + i * 0x00010000; | |
318 | } | |
319 | } | |
320 | } | |
321 | ||
322 | /* check for protected sectors */ | |
323 | for (i = 0; i < info->sector_count; i++) { | |
324 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
325 | /* D0 = 1 if protected */ | |
326 | #ifdef CONFIG_ADCIOP | |
327 | addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]); | |
328 | info->protect[i] = addr2[4] & 1; | |
329 | #else | |
330 | addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]); | |
331 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) | |
332 | info->protect[i] = 0; | |
333 | else | |
334 | info->protect[i] = addr2[2] & 1; | |
335 | #endif | |
336 | } | |
337 | ||
338 | /* | |
339 | * Prevent writes to uninitialized FLASH. | |
340 | */ | |
341 | if (info->flash_id != FLASH_UNKNOWN) { | |
342 | #if 0 /* test-only */ | |
343 | #ifdef CONFIG_ADCIOP | |
344 | addr2 = (volatile unsigned char *)info->start[0]; | |
345 | addr2[ADDR0] = 0xAA; | |
346 | addr2[ADDR1] = 0x55; | |
347 | addr2[ADDR0] = 0xF0; /* reset bank */ | |
348 | #else | |
349 | addr2 = (FLASH_WORD_SIZE *)info->start[0]; | |
350 | *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ | |
351 | #endif | |
352 | #else /* test-only */ | |
353 | addr2 = (FLASH_WORD_SIZE *)info->start[0]; | |
354 | *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ | |
355 | #endif /* test-only */ | |
356 | } | |
357 | ||
358 | return (info->size); | |
359 | } | |
360 | ||
361 | int wait_for_DQ7(flash_info_t *info, int sect) | |
362 | { | |
363 | ulong start, now, last; | |
364 | volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]); | |
365 | ||
366 | start = get_timer (0); | |
367 | last = start; | |
368 | while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) { | |
6d0f6bcf | 369 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
ba56f625 WD |
370 | printf ("Timeout\n"); |
371 | return -1; | |
372 | } | |
373 | /* show that we're waiting */ | |
374 | if ((now - last) > 1000) { /* every second */ | |
375 | putc ('.'); | |
376 | last = now; | |
377 | } | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
382 | /*----------------------------------------------------------------------- | |
383 | */ | |
384 | ||
385 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
386 | { | |
387 | volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]); | |
388 | volatile FLASH_WORD_SIZE *addr2; | |
389 | int flag, prot, sect, l_sect; | |
390 | int i; | |
391 | ||
392 | if ((s_first < 0) || (s_first > s_last)) { | |
393 | if (info->flash_id == FLASH_UNKNOWN) { | |
394 | printf ("- missing\n"); | |
395 | } else { | |
396 | printf ("- no sectors to erase\n"); | |
397 | } | |
398 | return 1; | |
399 | } | |
400 | ||
401 | if (info->flash_id == FLASH_UNKNOWN) { | |
402 | printf ("Can't erase unknown flash type - aborted\n"); | |
403 | return 1; | |
404 | } | |
405 | ||
406 | prot = 0; | |
407 | for (sect=s_first; sect<=s_last; ++sect) { | |
408 | if (info->protect[sect]) { | |
409 | prot++; | |
410 | } | |
411 | } | |
412 | ||
413 | if (prot) { | |
414 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
415 | prot); | |
416 | } else { | |
417 | printf ("\n"); | |
418 | } | |
419 | ||
420 | l_sect = -1; | |
421 | ||
422 | /* Disable interrupts which might cause a timeout here */ | |
423 | flag = disable_interrupts(); | |
424 | ||
425 | /* Start erase on unprotected sectors */ | |
426 | for (sect = s_first; sect<=s_last; sect++) { | |
427 | if (info->protect[sect] == 0) { /* not protected */ | |
428 | addr2 = (FLASH_WORD_SIZE *)(info->start[sect]); | |
429 | printf("Erasing sector %p\n", addr2); | |
430 | ||
431 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) { | |
432 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; | |
433 | addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; | |
434 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080; | |
435 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; | |
436 | addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; | |
437 | addr2[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */ | |
438 | for (i=0; i<50; i++) | |
439 | udelay(1000); /* wait 1 ms */ | |
440 | } else { | |
441 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; | |
442 | addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; | |
443 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080; | |
444 | addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA; | |
445 | addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055; | |
446 | addr2[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */ | |
447 | } | |
448 | l_sect = sect; | |
449 | /* | |
450 | * Wait for each sector to complete, it's more | |
451 | * reliable. According to AMD Spec, you must | |
452 | * issue all erase commands within a specified | |
453 | * timeout. This has been seen to fail, especially | |
454 | * if printf()s are included (for debug)!! | |
455 | */ | |
456 | wait_for_DQ7(info, sect); | |
457 | } | |
458 | } | |
459 | ||
460 | /* re-enable interrupts if necessary */ | |
461 | if (flag) | |
462 | enable_interrupts(); | |
463 | ||
464 | /* wait at least 80us - let's wait 1 ms */ | |
465 | udelay (1000); | |
466 | ||
467 | #if 0 | |
468 | /* | |
469 | * We wait for the last triggered sector | |
470 | */ | |
471 | if (l_sect < 0) | |
472 | goto DONE; | |
473 | wait_for_DQ7(info, l_sect); | |
474 | ||
475 | DONE: | |
476 | #endif | |
477 | /* reset to read mode */ | |
478 | addr = (FLASH_WORD_SIZE *)info->start[0]; | |
479 | addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ | |
480 | ||
481 | printf (" done\n"); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /*----------------------------------------------------------------------- | |
486 | * Copy memory to flash, returns: | |
487 | * 0 - OK | |
488 | * 1 - write timeout | |
489 | * 2 - Flash not erased | |
490 | */ | |
491 | ||
492 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
493 | { | |
494 | ulong cp, wp, data; | |
495 | int i, l, rc; | |
496 | ||
497 | wp = (addr & ~3); /* get lower word aligned address */ | |
498 | ||
499 | /* | |
500 | * handle unaligned start bytes | |
501 | */ | |
502 | if ((l = addr - wp) != 0) { | |
503 | data = 0; | |
504 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
505 | data = (data << 8) | (*(uchar *)cp); | |
506 | } | |
507 | for (; i<4 && cnt>0; ++i) { | |
508 | data = (data << 8) | *src++; | |
509 | --cnt; | |
510 | ++cp; | |
511 | } | |
512 | for (; cnt==0 && i<4; ++i, ++cp) { | |
513 | data = (data << 8) | (*(uchar *)cp); | |
514 | } | |
515 | ||
516 | if ((rc = write_word(info, wp, data)) != 0) { | |
517 | return (rc); | |
518 | } | |
519 | wp += 4; | |
520 | } | |
521 | ||
522 | /* | |
523 | * handle word aligned part | |
524 | */ | |
525 | while (cnt >= 4) { | |
526 | data = 0; | |
527 | for (i=0; i<4; ++i) { | |
528 | data = (data << 8) | *src++; | |
529 | } | |
530 | if ((rc = write_word(info, wp, data)) != 0) { | |
531 | return (rc); | |
532 | } | |
533 | wp += 4; | |
534 | cnt -= 4; | |
535 | } | |
536 | ||
537 | if (cnt == 0) { | |
538 | return (0); | |
539 | } | |
540 | ||
541 | /* | |
542 | * handle unaligned tail bytes | |
543 | */ | |
544 | data = 0; | |
545 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
546 | data = (data << 8) | *src++; | |
547 | --cnt; | |
548 | } | |
549 | for (; i<4; ++i, ++cp) { | |
550 | data = (data << 8) | (*(uchar *)cp); | |
551 | } | |
552 | ||
553 | return (write_word(info, wp, data)); | |
554 | } | |
555 | ||
556 | /*----------------------------------------------------------------------- | |
557 | * Write a word to Flash, returns: | |
558 | * 0 - OK | |
559 | * 1 - write timeout | |
560 | * 2 - Flash not erased | |
561 | */ | |
562 | static int write_word (flash_info_t * info, ulong dest, ulong data) | |
563 | { | |
564 | volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]); | |
565 | volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest; | |
566 | volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; | |
567 | ulong start; | |
568 | int i; | |
569 | ||
570 | /* Check if Flash is (sufficiently) erased */ | |
571 | if ((*((volatile FLASH_WORD_SIZE *) dest) & | |
572 | (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { | |
573 | return (2); | |
574 | } | |
575 | ||
576 | for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { | |
577 | int flag; | |
578 | ||
579 | /* Disable interrupts which might cause a timeout here */ | |
580 | flag = disable_interrupts (); | |
581 | ||
582 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
583 | addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
584 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0; | |
585 | ||
586 | dest2[i] = data2[i]; | |
587 | ||
588 | /* re-enable interrupts if necessary */ | |
589 | if (flag) | |
590 | enable_interrupts (); | |
591 | ||
592 | /* data polling for D7 */ | |
593 | start = get_timer (0); | |
594 | while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) != | |
595 | (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { | |
596 | ||
6d0f6bcf | 597 | if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
ba56f625 WD |
598 | return (1); |
599 | } | |
600 | } | |
601 | } | |
602 | ||
603 | return (0); | |
604 | } | |
605 | ||
606 | /*----------------------------------------------------------------------- | |
607 | */ |