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3bbc899f WD |
1 | /* |
2 | * (C) Copyright 2003 | |
3 | * MuLogic B.V. | |
4 | * | |
5 | * (C) Copyright 2001 | |
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 <common.h> | |
28 | #include <ppc4xx.h> | |
29 | #include <asm/u-boot.h> | |
30 | #include <asm/processor.h> | |
31 | ||
6d0f6bcf | 32 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
3bbc899f WD |
33 | |
34 | ||
35 | #define FLASH_WORD_SIZE unsigned long | |
36 | #define FLASH_ID_MASK 0xFFFFFFFF | |
37 | ||
38 | /*----------------------------------------------------------------------- | |
39 | * Functions | |
40 | */ | |
41 | /* stolen from esteem192e/flash.c */ | |
42 | ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info); | |
43 | ||
44 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
45 | static void flash_get_offsets (ulong base, flash_info_t *info); | |
46 | ||
47 | ||
48 | /*----------------------------------------------------------------------- | |
49 | */ | |
50 | ||
51 | unsigned long flash_init (void) | |
52 | { | |
53 | unsigned long size_b0, size_b1; | |
54 | int i; | |
55 | uint pbcr; | |
56 | unsigned long base_b0, base_b1; | |
57 | volatile FLASH_WORD_SIZE* flash_base; | |
58 | ||
59 | /* Init: no FLASHes known */ | |
6d0f6bcf | 60 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
3bbc899f WD |
61 | flash_info[i].flash_id = FLASH_UNKNOWN; |
62 | } | |
63 | ||
64 | /* Static FLASH Bank configuration here */ | |
65 | /* Test for 8M Flash first */ | |
66 | debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM); | |
67 | flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM); | |
68 | size_b0 = flash_get_size(flash_base, &flash_info[0]); | |
69 | ||
70 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
71 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
72 | size_b0, size_b0<<20); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | if (size_b0 < 8*1024*1024) { | |
77 | /* Not quite 8M, try 4M Flash base address */ | |
78 | debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM); | |
79 | flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM); | |
80 | size_b0 = flash_get_size(flash_base, &flash_info[0]); | |
81 | } | |
82 | ||
83 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
84 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
85 | size_b0, size_b0<<20); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | /* Only one bank */ | |
6d0f6bcf | 90 | if (CONFIG_SYS_MAX_FLASH_BANKS == 1) { |
3bbc899f WD |
91 | /* Setup offsets */ |
92 | flash_get_offsets ((ulong)flash_base, &flash_info[0]); | |
93 | ||
94 | /* Monitor protection ON by default */ | |
6d0f6bcf JCPV |
95 | (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, |
96 | CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]); | |
3bbc899f WD |
97 | size_b1 = 0 ; |
98 | flash_info[0].size = size_b0; | |
99 | return(size_b0); | |
100 | } | |
101 | ||
102 | /* We have 2 banks */ | |
103 | size_b1 = flash_get_size(flash_base, &flash_info[1]); | |
104 | ||
105 | /* Re-do sizing to get full correct info */ | |
106 | if (size_b1) { | |
d1c3b275 SR |
107 | mtdcr(EBC0_CFGADDR, PB0CR); |
108 | pbcr = mfdcr(EBC0_CFGDATA); | |
109 | mtdcr(EBC0_CFGADDR, PB0CR); | |
3bbc899f WD |
110 | base_b1 = -size_b1; |
111 | pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17); | |
d1c3b275 | 112 | mtdcr(EBC0_CFGDATA, pbcr); |
3bbc899f WD |
113 | } |
114 | ||
115 | if (size_b0) { | |
d1c3b275 SR |
116 | mtdcr(EBC0_CFGADDR, PB1CR); |
117 | pbcr = mfdcr(EBC0_CFGDATA); | |
118 | mtdcr(EBC0_CFGADDR, PB1CR); | |
3bbc899f WD |
119 | base_b0 = base_b1 - size_b0; |
120 | pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17); | |
d1c3b275 | 121 | mtdcr(EBC0_CFGDATA, pbcr); |
3bbc899f WD |
122 | } |
123 | ||
124 | size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]); | |
125 | flash_get_offsets (base_b0, &flash_info[0]); | |
126 | ||
127 | /* monitor protection ON by default */ | |
6d0f6bcf JCPV |
128 | (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, |
129 | CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]); | |
3bbc899f WD |
130 | |
131 | if (size_b1) { | |
132 | /* Re-do sizing to get full correct info */ | |
133 | size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]); | |
134 | flash_get_offsets (base_b1, &flash_info[1]); | |
135 | ||
136 | /* monitor protection ON by default */ | |
6d0f6bcf | 137 | (void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CONFIG_SYS_MONITOR_LEN, |
3bbc899f WD |
138 | base_b1+size_b1-1, &flash_info[1]); |
139 | ||
140 | /* monitor protection OFF by default (one is enough) */ | |
6d0f6bcf | 141 | (void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CONFIG_SYS_MONITOR_LEN, |
3bbc899f WD |
142 | base_b0+size_b0-1, &flash_info[0]); |
143 | } else { | |
144 | flash_info[1].flash_id = FLASH_UNKNOWN; | |
145 | flash_info[1].sector_count = -1; | |
146 | } | |
147 | ||
148 | flash_info[0].size = size_b0; | |
149 | flash_info[1].size = size_b1; | |
150 | return (size_b0 + size_b1); | |
151 | } | |
152 | ||
153 | ||
3bbc899f WD |
154 | /*----------------------------------------------------------------------- |
155 | This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823. | |
156 | */ | |
157 | ||
158 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
159 | { | |
160 | int i; | |
161 | long large_sect_size; | |
162 | long small_sect_size; | |
163 | ||
164 | /* set up sector start adress table */ | |
165 | large_sect_size = info->size / (info->sector_count - 8 + 1); | |
166 | small_sect_size = large_sect_size / 8; | |
167 | ||
168 | if (info->flash_id & FLASH_BTYPE) { | |
169 | ||
170 | /* set sector offsets for bottom boot block type */ | |
171 | for (i = 0; i < 7; i++) { | |
172 | info->start[i] = base; | |
173 | base += small_sect_size; | |
174 | } | |
175 | ||
176 | for (; i < info->sector_count; i++) { | |
177 | info->start[i] = base; | |
178 | base += large_sect_size; | |
179 | } | |
180 | } | |
181 | else | |
182 | { | |
183 | /* set sector offsets for top boot block type */ | |
184 | for (i = 0; i < (info->sector_count - 8); i++) { | |
185 | info->start[i] = base; | |
186 | base += large_sect_size; | |
187 | } | |
188 | ||
189 | for (; i < info->sector_count; i++) { | |
190 | info->start[i] = base; | |
191 | base += small_sect_size; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | /*----------------------------------------------------------------------- | |
197 | */ | |
198 | ||
199 | void flash_print_info (flash_info_t *info) | |
200 | { | |
201 | int i; | |
202 | uchar *boottype; | |
203 | uchar botboot[]=", bottom boot sect)\n"; | |
204 | uchar topboot[]=", top boot sector)\n"; | |
205 | ||
206 | if (info->flash_id == FLASH_UNKNOWN) { | |
207 | printf ("missing or unknown FLASH type\n"); | |
208 | return; | |
209 | } | |
210 | ||
211 | switch (info->flash_id & FLASH_VENDMASK) { | |
212 | case FLASH_MAN_AMD: | |
213 | printf ("AMD "); | |
214 | break; | |
215 | case FLASH_MAN_FUJ: | |
216 | printf ("FUJITSU "); | |
217 | break; | |
218 | case FLASH_MAN_SST: | |
219 | printf ("SST "); | |
220 | break; | |
221 | case FLASH_MAN_STM: | |
222 | printf ("STM "); | |
223 | break; | |
224 | case FLASH_MAN_INTEL: | |
225 | printf ("INTEL "); | |
226 | break; | |
227 | default: | |
228 | printf ("Unknown Vendor "); | |
229 | break; | |
230 | } | |
231 | ||
232 | if (info->flash_id & 0x0001 ) { | |
233 | boottype = botboot; | |
234 | } else { | |
235 | boottype = topboot; | |
236 | } | |
237 | ||
238 | switch (info->flash_id & FLASH_TYPEMASK) { | |
239 | case FLASH_AM160B: | |
240 | printf ("AM29LV160B (16 Mbit%s",boottype); | |
241 | break; | |
242 | case FLASH_AM160T: | |
243 | printf ("AM29LV160T (16 Mbit%s",boottype); | |
244 | break; | |
245 | case FLASH_AMDL163T: | |
246 | printf ("AM29DL163T (16 Mbit%s",boottype); | |
247 | break; | |
248 | case FLASH_AMDL163B: | |
249 | printf ("AM29DL163B (16 Mbit%s",boottype); | |
250 | break; | |
251 | case FLASH_AM320B: | |
252 | printf ("AM29LV320B (32 Mbit%s",boottype); | |
253 | break; | |
254 | case FLASH_AM320T: | |
255 | printf ("AM29LV320T (32 Mbit%s",boottype); | |
256 | break; | |
257 | case FLASH_AMDL323T: | |
258 | printf ("AM29DL323T (32 Mbit%s",boottype); | |
259 | break; | |
260 | case FLASH_AMDL323B: | |
261 | printf ("AM29DL323B (32 Mbit%s",boottype); | |
262 | break; | |
263 | case FLASH_AMDL322T: | |
264 | printf ("AM29DL322T (32 Mbit%s",boottype); | |
265 | break; | |
266 | default: | |
267 | printf ("Unknown Chip Type\n"); | |
268 | break; | |
269 | } | |
270 | ||
271 | printf (" Size: %ld MB in %d Sectors\n", | |
272 | info->size >> 20, info->sector_count); | |
273 | ||
274 | printf (" Sector Start Addresses:"); | |
275 | for (i=0; i<info->sector_count; ++i) { | |
276 | if ((i % 5) == 0) | |
277 | printf ("\n "); | |
278 | printf (" %08lX%s", info->start[i], | |
279 | info->protect[i] ? " (RO)" : " "); | |
280 | } | |
281 | printf ("\n"); | |
282 | return; | |
283 | } | |
284 | ||
285 | ||
286 | /*----------------------------------------------------------------------- | |
287 | * The following code cannot be run from FLASH! | |
288 | */ | |
289 | ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info) | |
290 | { | |
291 | short i; | |
292 | ulong base = (ulong)addr; | |
293 | FLASH_WORD_SIZE value; | |
294 | ||
295 | /* Write auto select command: read Manufacturer ID */ | |
296 | ||
297 | /* | |
298 | * Note: if it is an AMD flash and the word at addr[0000] | |
299 | * is 0x00890089 this routine will think it is an Intel | |
300 | * flash device and may(most likely) cause trouble. | |
301 | */ | |
302 | ||
303 | addr[0x0000] = 0x00900090; | |
304 | if(addr[0x0000] != 0x00890089){ | |
305 | addr[0x0555] = 0x00AA00AA; | |
306 | addr[0x02AA] = 0x00550055; | |
307 | addr[0x0555] = 0x00900090; | |
308 | } | |
309 | value = addr[0]; | |
310 | ||
311 | switch (value) { | |
312 | case (AMD_MANUFACT & FLASH_ID_MASK): | |
313 | info->flash_id = FLASH_MAN_AMD; | |
314 | break; | |
315 | case (FUJ_MANUFACT & FLASH_ID_MASK): | |
316 | info->flash_id = FLASH_MAN_FUJ; | |
317 | break; | |
318 | case (STM_MANUFACT & FLASH_ID_MASK): | |
319 | info->flash_id = FLASH_MAN_STM; | |
320 | break; | |
321 | case (SST_MANUFACT & FLASH_ID_MASK): | |
322 | info->flash_id = FLASH_MAN_SST; | |
323 | break; | |
324 | case (INTEL_MANUFACT & FLASH_ID_MASK): | |
325 | info->flash_id = FLASH_MAN_INTEL; | |
326 | break; | |
327 | default: | |
328 | info->flash_id = FLASH_UNKNOWN; | |
329 | info->sector_count = 0; | |
330 | info->size = 0; | |
331 | return (0); /* no or unknown flash */ | |
332 | } | |
333 | ||
334 | value = addr[1]; /* device ID */ | |
335 | ||
336 | switch (value) { | |
337 | case (AMD_ID_LV160T & FLASH_ID_MASK): | |
338 | info->flash_id += FLASH_AM160T; | |
339 | info->sector_count = 35; | |
340 | info->size = 0x00400000; | |
341 | break; /* => 4 MB */ | |
342 | ||
343 | case (AMD_ID_LV160B & FLASH_ID_MASK): | |
344 | info->flash_id += FLASH_AM160B; | |
345 | info->sector_count = 35; | |
346 | info->size = 0x00400000; | |
347 | break; /* => 4 MB */ | |
348 | ||
349 | case (AMD_ID_DL163T & FLASH_ID_MASK): | |
350 | info->flash_id += FLASH_AMDL163T; | |
351 | info->sector_count = 39; | |
352 | info->size = 0x00400000; | |
353 | break; /* => 4 MB */ | |
354 | ||
355 | case (AMD_ID_DL163B & FLASH_ID_MASK): | |
356 | info->flash_id += FLASH_AMDL163B; | |
357 | info->sector_count = 39; | |
358 | info->size = 0x00400000; | |
359 | break; /* => 4 MB */ | |
360 | ||
361 | case (AMD_ID_DL323T & FLASH_ID_MASK): | |
362 | info->flash_id += FLASH_AMDL323T; | |
363 | info->sector_count = 71; | |
364 | info->size = 0x00800000; | |
365 | break; /* => 8 MB */ | |
366 | ||
367 | case (AMD_ID_DL323B & FLASH_ID_MASK): | |
368 | info->flash_id += FLASH_AMDL323B; | |
369 | info->sector_count = 71; | |
370 | info->size = 0x00800000; | |
371 | break; /* => 8 MB */ | |
372 | ||
373 | case (AMD_ID_DL322T & FLASH_ID_MASK): | |
374 | info->flash_id += FLASH_AMDL322T; | |
375 | info->sector_count = 71; | |
376 | info->size = 0x00800000; | |
377 | break; /* => 8 MB */ | |
378 | ||
379 | default: | |
380 | /* FIXME*/ | |
381 | info->flash_id = FLASH_UNKNOWN; | |
382 | return (0); /* => no or unknown flash */ | |
383 | } | |
384 | ||
385 | flash_get_offsets(base, info); | |
386 | ||
387 | /* check for protected sectors */ | |
388 | for (i = 0; i < info->sector_count; i++) { | |
389 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
390 | /* D0 = 1 if protected */ | |
391 | addr = (volatile FLASH_WORD_SIZE *)(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 | addr = (volatile FLASH_WORD_SIZE *)info->start[0]; | |
400 | *addr = (0x00FF00FF & FLASH_ID_MASK); /* reset bank */ | |
401 | } | |
402 | ||
403 | return (info->size); | |
404 | } | |
405 | ||
406 | ||
407 | /*----------------------------------------------------------------------- | |
408 | */ | |
409 | ||
410 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
411 | { | |
412 | volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]); | |
413 | int flag, prot, sect, l_sect; | |
414 | ulong start, now, last; | |
415 | int rcode = 0; | |
416 | ||
417 | if ((s_first < 0) || (s_first > s_last)) { | |
418 | if (info->flash_id == FLASH_UNKNOWN) { | |
419 | printf ("- missing\n"); | |
420 | } else { | |
421 | printf ("- no sectors to erase\n"); | |
422 | } | |
423 | return 1; | |
424 | } | |
425 | ||
426 | if ((info->flash_id == FLASH_UNKNOWN) || | |
427 | (info->flash_id > FLASH_AMD_COMP) ) { | |
428 | printf ("Can't erase unknown flash type - aborted\n"); | |
429 | return 1; | |
430 | } | |
431 | ||
432 | prot = 0; | |
433 | for (sect=s_first; sect<=s_last; ++sect) { | |
434 | if (info->protect[sect]) { | |
435 | prot++; | |
436 | } | |
437 | } | |
438 | ||
439 | if (prot) { | |
440 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
441 | prot); | |
442 | } else { | |
443 | printf ("\n"); | |
444 | } | |
445 | ||
446 | l_sect = -1; | |
447 | ||
448 | /* Disable interrupts which might cause a timeout here */ | |
449 | flag = disable_interrupts(); | |
450 | addr[0x0555] = 0x00AA00AA; | |
451 | addr[0x02AA] = 0x00550055; | |
452 | addr[0x0555] = 0x00800080; | |
453 | addr[0x0555] = 0x00AA00AA; | |
454 | addr[0x02AA] = 0x00550055; | |
455 | /* Start erase on unprotected sectors */ | |
456 | for (sect = s_first; sect<=s_last; sect++) { | |
457 | if (info->protect[sect] == 0) { /* not protected */ | |
458 | addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]); | |
459 | addr[0] = (0x00300030 & FLASH_ID_MASK); | |
460 | l_sect = sect; | |
461 | } | |
462 | } | |
463 | ||
464 | /* re-enable interrupts if necessary */ | |
465 | if (flag) | |
466 | enable_interrupts(); | |
467 | ||
468 | /* wait at least 80us - let's wait 1 ms */ | |
469 | udelay (1000); | |
470 | ||
471 | /* | |
472 | * We wait for the last triggered sector | |
473 | */ | |
474 | if (l_sect < 0) | |
475 | goto DONE; | |
476 | ||
477 | start = get_timer (0); | |
478 | last = start; | |
479 | addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]); | |
480 | while ((addr[0] & (0x00800080&FLASH_ID_MASK)) != | |
481 | (0x00800080&FLASH_ID_MASK) ) | |
482 | { | |
6d0f6bcf | 483 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
3bbc899f WD |
484 | printf ("Timeout\n"); |
485 | return 1; | |
486 | } | |
487 | /* show that we're waiting */ | |
488 | if ((now - last) > 1000) { /* every second */ | |
489 | serial_putc ('.'); | |
490 | last = now; | |
491 | } | |
492 | } | |
493 | ||
494 | DONE: | |
495 | /* reset to read mode */ | |
496 | addr = (volatile FLASH_WORD_SIZE *)info->start[0]; | |
497 | addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */ | |
498 | ||
499 | printf (" done\n"); | |
500 | return rcode; | |
501 | } | |
502 | ||
503 | /*----------------------------------------------------------------------- | |
504 | * Copy memory to flash, returns: | |
505 | * 0 - OK | |
506 | * 1 - write timeout | |
507 | * 2 - Flash not erased | |
508 | */ | |
509 | ||
510 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
511 | { | |
512 | ulong cp, wp, data; | |
513 | int l; | |
514 | int i, rc; | |
515 | ||
516 | wp = (addr & ~3); /* get lower word aligned address */ | |
517 | ||
518 | /* | |
519 | * handle unaligned start bytes | |
520 | */ | |
521 | if ((l = addr - wp) != 0) { | |
522 | data = 0; | |
523 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
524 | data = (data << 8) | (*(uchar *)cp); | |
525 | } | |
526 | for (; i<4 && cnt>0; ++i) { | |
527 | data = (data << 8) | *src++; | |
528 | --cnt; | |
529 | ++cp; | |
530 | } | |
531 | for (; cnt==0 && i<4; ++i, ++cp) { | |
532 | data = (data << 8) | (*(uchar *)cp); | |
533 | } | |
534 | ||
535 | if ((rc = write_word(info, wp, data)) != 0) { | |
536 | return (rc); | |
537 | } | |
538 | wp += 4; | |
539 | } | |
540 | ||
541 | /* | |
542 | * handle word aligned part | |
543 | */ | |
544 | while (cnt >= 4) { | |
545 | data = 0; | |
546 | for (i=0; i<4; ++i) { | |
547 | data = (data << 8) | *src++; | |
548 | } | |
549 | if ((rc = write_word(info, wp, data)) != 0) { | |
550 | return (rc); | |
551 | } | |
552 | wp += 4; | |
553 | cnt -= 4; | |
554 | } | |
555 | ||
556 | if (cnt == 0) { | |
557 | return (0); | |
558 | } | |
559 | ||
560 | /* | |
561 | * handle unaligned tail bytes | |
562 | */ | |
563 | data = 0; | |
564 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
565 | data = (data << 8) | *src++; | |
566 | --cnt; | |
567 | } | |
568 | for (; i<4; ++i, ++cp) { | |
569 | data = (data << 8) | (*(uchar *)cp); | |
570 | } | |
571 | ||
572 | return (write_word(info, wp, data)); | |
573 | } | |
574 | ||
575 | /*----------------------------------------------------------------------- | |
576 | * Write a word to Flash, returns: | |
577 | * 0 - OK | |
578 | * 1 - write timeout | |
579 | * 2 - Flash not erased | |
580 | */ | |
581 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
582 | { | |
583 | vu_long *addr = (vu_long*)(info->start[0]); | |
584 | ulong start; | |
585 | int flag; | |
586 | ||
587 | /* Check if Flash is (sufficiently) erased */ | |
588 | if ((*((vu_long *)dest) & data) != data) { | |
589 | return (2); | |
590 | } | |
591 | ||
592 | /* Disable interrupts which might cause a timeout here */ | |
593 | flag = disable_interrupts(); | |
594 | ||
595 | /* AMD stuff */ | |
596 | addr[0x0555] = 0x00AA00AA; | |
597 | addr[0x02AA] = 0x00550055; | |
598 | addr[0x0555] = 0x00A000A0; | |
599 | ||
600 | *((vu_long *)dest) = data; | |
601 | ||
602 | /* re-enable interrupts if necessary */ | |
603 | if (flag) | |
604 | enable_interrupts(); | |
605 | ||
606 | /* data polling for D7 */ | |
607 | start = get_timer(0); | |
608 | ||
609 | while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) { | |
6d0f6bcf | 610 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
3bbc899f WD |
611 | return (1); |
612 | } | |
613 | } | |
614 | ||
615 | return (0); | |
616 | } |