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1 | /******************************************************************** |
2 | * | |
3 | * Unless otherwise specified, Copyright (C) 2004-2005 Barco Control Rooms | |
4 | * | |
5 | * $Source: /home/services/cvs/firmware/ppc/u-boot-1.1.2/board/barco/flash.c,v $ | |
6 | * $Revision: 1.3 $ | |
7 | * $Author: mleeman $ | |
8 | * $Date: 2005/02/21 12:48:58 $ | |
9 | * | |
10 | * Last ChangeLog Entry | |
11 | * $Log: flash.c,v $ | |
12 | * Revision 1.3 2005/02/21 12:48:58 mleeman | |
13 | * update of copyright years (feedback wd) | |
14 | * | |
15 | * Revision 1.2 2005/02/21 11:04:04 mleeman | |
16 | * remove dead code and Coding style (feedback wd) | |
17 | * | |
18 | * Revision 1.1 2005/02/14 09:23:46 mleeman | |
19 | * - moved 'barcohydra' directory to a more generic barco; since we will be | |
20 | * supporting and adding multiple boards | |
21 | * | |
22 | * Revision 1.2 2005/02/09 12:56:23 mleeman | |
23 | * add generic header to track changes in sources | |
24 | * | |
25 | * | |
26 | *******************************************************************/ | |
27 | ||
28 | /* | |
29 | * (C) Copyright 2000 | |
30 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
31 | * | |
32 | * See file CREDITS for list of people who contributed to this | |
33 | * project. | |
34 | * | |
35 | * This program is free software; you can redistribute it and/or | |
36 | * modify it under the terms of the GNU General Public License as | |
37 | * published by the Free Software Foundation; either version 2 of | |
38 | * the License, or (at your option) any later version. | |
39 | * | |
40 | * This program is distributed in the hope that it will be useful, | |
41 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
43 | * GNU General Public License for more details. | |
44 | * | |
45 | * You should have received a copy of the GNU General Public License | |
46 | * along with this program; if not, write to the Free Software | |
47 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
48 | * MA 02111-1307 USA | |
49 | */ | |
50 | ||
51 | #include <common.h> | |
52 | #include <mpc824x.h> | |
53 | #include <asm/processor.h> | |
54 | #include <flash.h> | |
55 | ||
56 | #define ROM_CS0_START 0xFF800000 | |
57 | #define ROM_CS1_START 0xFF000000 | |
58 | ||
59 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ | |
60 | ||
61 | #if defined(CFG_ENV_IS_IN_FLASH) | |
62 | # ifndef CFG_ENV_ADDR | |
63 | # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) | |
64 | # endif | |
65 | # ifndef CFG_ENV_SIZE | |
66 | # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE | |
67 | # endif | |
68 | # ifndef CFG_ENV_SECT_SIZE | |
69 | # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE | |
70 | # endif | |
71 | #endif | |
72 | ||
73 | /*----------------------------------------------------------------------- | |
74 | * Functions | |
75 | */ | |
76 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
77 | ||
78 | /*flash command address offsets*/ | |
79 | ||
80 | #define ADDR0 (0xAAA) | |
81 | #define ADDR1 (0x555) | |
82 | #define ADDR3 (0x001) | |
83 | ||
84 | #define FLASH_WORD_SIZE unsigned char | |
85 | ||
86 | /*----------------------------------------------------------------------- | |
87 | */ | |
88 | ||
89 | static unsigned long flash_id(unsigned char mfct, unsigned char chip) __attribute__ ((const)); | |
90 | ||
91 | typedef struct{ | |
92 | FLASH_WORD_SIZE extval; | |
93 | unsigned short intval; | |
94 | } map_entry; | |
95 | ||
96 | static unsigned long flash_id(unsigned char mfct, unsigned char chip) | |
97 | { | |
98 | static const map_entry mfct_map[] = { | |
99 | {(FLASH_WORD_SIZE) AMD_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)}, | |
100 | {(FLASH_WORD_SIZE) FUJ_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)}, | |
101 | {(FLASH_WORD_SIZE) STM_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)}, | |
102 | {(FLASH_WORD_SIZE) MT_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)}, | |
103 | {(FLASH_WORD_SIZE) INTEL_MANUFACT,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}, | |
104 | {(FLASH_WORD_SIZE) INTEL_ALT_MANU,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)} | |
105 | }; | |
106 | ||
107 | static const map_entry chip_map[] = { | |
108 | {AMD_ID_F040B, FLASH_AM040}, | |
109 | {AMD_ID_F033C, FLASH_AM033}, | |
110 | {AMD_ID_F065D, FLASH_AM065}, | |
111 | {ATM_ID_LV040, FLASH_AT040}, | |
112 | {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB} | |
113 | }; | |
114 | ||
115 | const map_entry *p; | |
116 | unsigned long result = FLASH_UNKNOWN; | |
117 | ||
118 | /* find chip id */ | |
119 | for(p = &chip_map[0]; p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++){ | |
120 | if(p->extval == chip){ | |
121 | result = FLASH_VENDMASK | p->intval; | |
122 | break; | |
123 | } | |
124 | } | |
125 | ||
126 | /* find vendor id */ | |
127 | for(p = &mfct_map[0]; p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++){ | |
128 | if(p->extval == mfct){ | |
129 | result &= ~FLASH_VENDMASK; | |
130 | result |= (unsigned long) p->intval << 16; | |
131 | break; | |
132 | } | |
133 | } | |
134 | ||
135 | return result; | |
136 | } | |
137 | ||
138 | ||
139 | unsigned long flash_init(void) | |
140 | { | |
141 | unsigned long i; | |
142 | unsigned char j; | |
143 | static const ulong flash_banks[] = CFG_FLASH_BANKS; | |
144 | ||
145 | /* Init: no FLASHes known */ | |
146 | for (i = 0; i < CFG_MAX_FLASH_BANKS; i++){ | |
147 | flash_info_t * const pflinfo = &flash_info[i]; | |
148 | pflinfo->flash_id = FLASH_UNKNOWN; | |
149 | pflinfo->size = 0; | |
150 | pflinfo->sector_count = 0; | |
151 | } | |
152 | ||
153 | /* Enable writes to Hydra/Argus flash */ | |
154 | { | |
155 | register unsigned int temp; | |
156 | CONFIG_READ_WORD(PICR1,temp); | |
157 | temp |= PICR1_FLASH_WR_EN; | |
158 | CONFIG_WRITE_WORD(PICR1,temp); | |
159 | } | |
160 | ||
161 | for(i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++){ | |
162 | flash_info_t * const pflinfo = &flash_info[i]; | |
163 | const unsigned long base_address = flash_banks[i]; | |
164 | volatile FLASH_WORD_SIZE * const flash = (FLASH_WORD_SIZE *) base_address; | |
165 | ||
166 | /* write autoselect sequence */ | |
167 | flash[0x5555] = 0xaa; | |
168 | flash[0x2aaa] = 0x55; | |
169 | flash[0x5555] = 0x90; | |
170 | __asm__ __volatile__("sync"); | |
171 | ||
172 | pflinfo->flash_id = flash_id(flash[0x0], flash[0x1]); | |
173 | ||
174 | switch(pflinfo->flash_id & FLASH_TYPEMASK){ | |
175 | case FLASH_AM033: | |
176 | pflinfo->size = 0x00200000; | |
177 | pflinfo->sector_count = 64; | |
178 | for(j = 0; j < 64; j++){ | |
179 | pflinfo->start[j] = base_address + 0x00010000 * j; | |
180 | pflinfo->protect[j] = flash[(j << 16) | 0x2]; | |
181 | } | |
182 | break; | |
183 | case FLASH_AM065: | |
184 | pflinfo->size = 0x00800000; | |
185 | pflinfo->sector_count =128; | |
186 | for(j = 0; j < 128; j++){ | |
187 | pflinfo->start[j] = base_address + 0x00010000 * j; | |
188 | pflinfo->protect[j] = flash[(j << 16) | 0x2]; | |
189 | } | |
190 | break; | |
191 | case FLASH_AT040: | |
192 | pflinfo->size = 0x00080000; | |
193 | pflinfo->sector_count = 2; | |
194 | pflinfo->start[0] = base_address ; | |
195 | pflinfo->start[1] = base_address + 0x00004000; | |
196 | pflinfo->protect[0] = ((flash[0x02] & 0X01)==0) ? 0X02 : 0X01; | |
197 | pflinfo->protect[1] = 0X02; | |
198 | break; | |
199 | case FLASH_AM040: | |
200 | pflinfo->size = 0x00080000; | |
201 | pflinfo->sector_count = 8; | |
202 | for(j = 0; j < 8; j++){ | |
203 | pflinfo->start[j] = base_address + 0x00010000 * j; | |
204 | pflinfo->protect[j] = flash[(j << 16) | 0x2]; | |
205 | } | |
206 | break; | |
207 | case FLASH_STM800AB: | |
208 | pflinfo->size = 0x00100000; | |
209 | pflinfo->sector_count = 19; | |
210 | pflinfo->start[0] = base_address; | |
211 | pflinfo->start[1] = base_address + 0x4000; | |
212 | pflinfo->start[2] = base_address + 0x6000; | |
213 | pflinfo->start[3] = base_address + 0x8000; | |
214 | for(j = 1; j < 16; j++){ | |
215 | pflinfo->start[j+3] = base_address + 0x00010000 * j; | |
216 | } | |
217 | break; | |
218 | } | |
219 | /* Protect monitor and environment sectors */ | |
220 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE | |
221 | flash_protect(FLAG_PROTECT_SET, | |
222 | CFG_MONITOR_BASE, | |
223 | CFG_MONITOR_BASE + monitor_flash_len - 1, | |
224 | &flash_info[0]); | |
225 | #endif | |
226 | ||
7d9b5bae | 227 | #if defined(CFG_ENV_IS_IN_FLASH) && defined(CFG_ENV_ADDR) |
8e6f1a8e WD |
228 | flash_protect(FLAG_PROTECT_SET, |
229 | CFG_ENV_ADDR, | |
230 | CFG_ENV_ADDR + CFG_ENV_SIZE - 1, | |
231 | &flash_info[0]); | |
232 | #endif | |
233 | ||
234 | /* reset device to read mode */ | |
235 | flash[0x0000] = 0xf0; | |
236 | __asm__ __volatile__("sync"); | |
237 | } | |
238 | ||
239 | return flash_info[0].size + flash_info[1].size; | |
240 | } | |
241 | ||
242 | /*----------------------------------------------------------------------- | |
243 | */ | |
244 | void flash_print_info(flash_info_t *info) | |
245 | { | |
246 | static const char unk[] = "Unknown"; | |
247 | const char *mfct = unk, *type = unk; | |
248 | unsigned int i; | |
249 | ||
250 | if(info->flash_id != FLASH_UNKNOWN){ | |
251 | switch(info->flash_id & FLASH_VENDMASK){ | |
252 | case FLASH_MAN_ATM: | |
253 | mfct = "Atmel"; | |
254 | break; | |
255 | case FLASH_MAN_AMD: | |
256 | mfct = "AMD"; | |
257 | break; | |
258 | case FLASH_MAN_FUJ: | |
259 | mfct = "FUJITSU"; | |
260 | break; | |
261 | case FLASH_MAN_STM: | |
262 | mfct = "STM"; | |
263 | break; | |
264 | case FLASH_MAN_SST: | |
265 | mfct = "SST"; | |
266 | break; | |
267 | case FLASH_MAN_BM: | |
268 | mfct = "Bright Microelectonics"; | |
269 | break; | |
270 | case FLASH_MAN_INTEL: | |
271 | mfct = "Intel"; | |
272 | break; | |
273 | } | |
274 | ||
275 | switch(info->flash_id & FLASH_TYPEMASK){ | |
276 | case FLASH_AT040: | |
277 | type = "AT49LV040 (512K * 8, uniform sector size)"; | |
278 | break; | |
279 | case FLASH_AM033: | |
280 | type = "AM29F033C (4 Mbit * 8, uniform sector size)"; | |
281 | break; | |
282 | case FLASH_AM040: | |
283 | type = "AM29F040B (512K * 8, uniform sector size)"; | |
284 | break; | |
285 | case FLASH_AM065: | |
286 | type = "AM29F0465D ( 8 MBit * 8, uniform sector size) or part of AM29F652D( 16 MB)"; | |
287 | break; | |
288 | case FLASH_AM400B: | |
289 | type = "AM29LV400B (4 Mbit, bottom boot sect)"; | |
290 | break; | |
291 | case FLASH_AM400T: | |
292 | type = "AM29LV400T (4 Mbit, top boot sector)"; | |
293 | break; | |
294 | case FLASH_AM800B: | |
295 | type = "AM29LV800B (8 Mbit, bottom boot sect)"; | |
296 | break; | |
297 | case FLASH_AM800T: | |
298 | type = "AM29LV800T (8 Mbit, top boot sector)"; | |
299 | break; | |
300 | case FLASH_AM160T: | |
301 | type = "AM29LV160T (16 Mbit, top boot sector)"; | |
302 | break; | |
303 | case FLASH_AM320B: | |
304 | type = "AM29LV320B (32 Mbit, bottom boot sect)"; | |
305 | break; | |
306 | case FLASH_AM320T: | |
307 | type = "AM29LV320T (32 Mbit, top boot sector)"; | |
308 | break; | |
309 | case FLASH_STM800AB: | |
310 | type = "M29W800AB (8 Mbit, bottom boot sect)"; | |
311 | break; | |
312 | case FLASH_SST800A: | |
313 | type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; | |
314 | break; | |
315 | case FLASH_SST160A: | |
316 | type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; | |
317 | break; | |
318 | } | |
319 | } | |
320 | ||
321 | printf( | |
322 | "\n Brand: %s Type: %s\n" | |
323 | " Size: %lu KB in %d Sectors\n", | |
324 | mfct, | |
325 | type, | |
326 | info->size >> 10, | |
327 | info->sector_count | |
328 | ); | |
329 | ||
330 | printf (" Sector Start Addresses:"); | |
331 | ||
332 | for (i = 0; i < info->sector_count; i++){ | |
333 | unsigned long size; | |
334 | unsigned int erased; | |
335 | unsigned long * flash = (unsigned long *) info->start[i]; | |
336 | ||
337 | /* | |
338 | * Check if whole sector is erased | |
339 | */ | |
340 | size = | |
341 | (i != (info->sector_count - 1)) ? | |
342 | (info->start[i + 1] - info->start[i]) >> 2 : | |
343 | (info->start[0] + info->size - info->start[i]) >> 2; | |
344 | ||
345 | for( | |
346 | flash = (unsigned long *) info->start[i], erased = 1; | |
347 | (flash != (unsigned long *) info->start[i] + size) && erased; | |
348 | flash++ | |
349 | ){ | |
350 | erased = *flash == ~0x0UL; | |
351 | } | |
352 | ||
353 | printf( | |
354 | "%s %08lX %s %s", | |
355 | (i % 5) ? "" : "\n ", | |
356 | info->start[i], | |
357 | erased ? "E" : " ", | |
358 | info->protect[i] ? "RO" : " " | |
359 | ); | |
360 | } | |
361 | ||
362 | puts("\n"); | |
363 | return; | |
364 | } | |
365 | ||
366 | int flash_erase(flash_info_t *info, int s_first, int s_last) | |
367 | { | |
368 | volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]); | |
369 | int flag, prot, sect, l_sect; | |
370 | ulong start, now, last; | |
371 | unsigned char sh8b; | |
372 | ||
373 | if ((s_first < 0) || (s_first > s_last)) { | |
374 | if (info->flash_id == FLASH_UNKNOWN) { | |
375 | printf ("- missing\n"); | |
376 | } else { | |
377 | printf ("- no sectors to erase\n"); | |
378 | } | |
379 | return 1; | |
380 | } | |
381 | ||
382 | if ((info->flash_id == FLASH_UNKNOWN) || | |
383 | (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) { | |
384 | printf ("Can't erase unknown flash type - aborted\n"); | |
385 | return 1; | |
386 | } | |
387 | ||
388 | prot = 0; | |
389 | for (sect=s_first; sect<=s_last; ++sect) { | |
390 | if (info->protect[sect]) { | |
391 | prot++; | |
392 | } | |
393 | } | |
394 | ||
395 | if (prot) { | |
396 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
397 | prot); | |
398 | } else { | |
399 | printf ("\n"); | |
400 | } | |
401 | ||
402 | l_sect = -1; | |
403 | ||
404 | /* Check the ROM CS */ | |
405 | if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)){ | |
406 | sh8b = 3; | |
407 | } | |
408 | else{ | |
409 | sh8b = 0; | |
410 | } | |
411 | ||
412 | /* Disable interrupts which might cause a timeout here */ | |
413 | flag = disable_interrupts(); | |
414 | ||
415 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; | |
416 | addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; | |
417 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080; | |
418 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; | |
419 | addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; | |
420 | ||
421 | /* Start erase on unprotected sectors */ | |
422 | for (sect = s_first; sect<=s_last; sect++) { | |
423 | if (info->protect[sect] == 0) { /* not protected */ | |
424 | addr = (FLASH_WORD_SIZE *)(info->start[0] + ( | |
425 | (info->start[sect] - info->start[0]) << sh8b)); | |
426 | if (info->flash_id & FLASH_MAN_SST){ | |
427 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; | |
428 | addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; | |
429 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080; | |
430 | addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; | |
431 | addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; | |
432 | addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */ | |
433 | udelay(30000); /* wait 30 ms */ | |
434 | } | |
435 | else | |
436 | addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */ | |
437 | l_sect = sect; | |
438 | } | |
439 | } | |
440 | ||
441 | /* re-enable interrupts if necessary */ | |
442 | if (flag){ | |
443 | enable_interrupts(); | |
444 | } | |
445 | ||
446 | /* wait at least 80us - let's wait 1 ms */ | |
447 | udelay (1000); | |
448 | ||
449 | /* | |
450 | * We wait for the last triggered sector | |
451 | */ | |
452 | if (l_sect < 0){ | |
453 | goto DONE; | |
454 | } | |
455 | ||
456 | start = get_timer (0); | |
457 | last = start; | |
458 | addr = (FLASH_WORD_SIZE *)(info->start[0] + ( | |
459 | (info->start[l_sect] - info->start[0]) << sh8b)); | |
460 | while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) { | |
461 | if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { | |
462 | printf ("Timeout\n"); | |
463 | return 1; | |
464 | } | |
465 | /* show that we're waiting */ | |
466 | if ((now - last) > 1000) { /* every second */ | |
467 | serial_putc ('.'); | |
468 | last = now; | |
469 | } | |
470 | } | |
471 | ||
472 | DONE: | |
473 | /* reset to read mode */ | |
474 | addr = (FLASH_WORD_SIZE *)info->start[0]; | |
475 | addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ | |
476 | ||
477 | printf (" done\n"); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | /*----------------------------------------------------------------------- | |
482 | * Copy memory to flash, returns: | |
483 | * 0 - OK | |
484 | * 1 - write timeout | |
485 | * 2 - Flash not erased | |
486 | */ | |
487 | ||
488 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
489 | { | |
490 | ulong cp, wp, data; | |
491 | int i, l, rc; | |
492 | ||
493 | wp = (addr & ~3); /* get lower word aligned address */ | |
494 | ||
495 | /* | |
496 | * handle unaligned start bytes | |
497 | */ | |
498 | if ((l = addr - wp) != 0) { | |
499 | data = 0; | |
500 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
501 | data = (data << 8) | (*(uchar *)cp); | |
502 | } | |
503 | for (; i<4 && cnt>0; ++i) { | |
504 | data = (data << 8) | *src++; | |
505 | --cnt; | |
506 | ++cp; | |
507 | } | |
508 | for (; cnt==0 && i<4; ++i, ++cp) { | |
509 | data = (data << 8) | (*(uchar *)cp); | |
510 | } | |
511 | ||
512 | if ((rc = write_word(info, wp, data)) != 0) { | |
513 | return (rc); | |
514 | } | |
515 | wp += 4; | |
516 | } | |
517 | ||
518 | /* | |
519 | * handle word aligned part | |
520 | */ | |
521 | while (cnt >= 4) { | |
522 | data = 0; | |
523 | for (i=0; i<4; ++i) { | |
524 | data = (data << 8) | *src++; | |
525 | } | |
526 | if ((rc = write_word(info, wp, data)) != 0) { | |
527 | return (rc); | |
528 | } | |
529 | wp += 4; | |
530 | cnt -= 4; | |
531 | } | |
532 | ||
533 | if (cnt == 0) { | |
534 | return (0); | |
535 | } | |
536 | ||
537 | /* | |
538 | * handle unaligned tail bytes | |
539 | */ | |
540 | data = 0; | |
541 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
542 | data = (data << 8) | *src++; | |
543 | --cnt; | |
544 | } | |
545 | for (; i<4; ++i, ++cp) { | |
546 | data = (data << 8) | (*(uchar *)cp); | |
547 | } | |
548 | ||
549 | return (write_word(info, wp, data)); | |
550 | } | |
551 | ||
552 | /*----------------------------------------------------------------------- | |
553 | * Write a word to Flash, returns: | |
554 | * 0 - OK | |
555 | * 1 - write timeout | |
556 | * 2 - Flash not erased | |
557 | */ | |
558 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
559 | { | |
560 | volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0]; | |
561 | volatile FLASH_WORD_SIZE *dest2; | |
562 | volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data; | |
563 | ulong start; | |
564 | int flag; | |
565 | int i; | |
566 | unsigned char sh8b; | |
567 | ||
568 | /* Check the ROM CS */ | |
569 | if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)){ | |
570 | sh8b = 3; | |
571 | } | |
572 | else{ | |
573 | sh8b = 0; | |
574 | } | |
575 | ||
576 | dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) + | |
577 | info->start[0]); | |
578 | ||
579 | /* Check if Flash is (sufficiently) erased */ | |
580 | if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) { | |
581 | return (2); | |
582 | } | |
583 | /* Disable interrupts which might cause a timeout here */ | |
584 | flag = disable_interrupts(); | |
585 | ||
586 | for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++){ | |
587 | addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; | |
588 | addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; | |
589 | addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0; | |
590 | ||
591 | dest2[i << sh8b] = data2[i]; | |
592 | ||
593 | /* re-enable interrupts if necessary */ | |
594 | if (flag){ | |
595 | enable_interrupts(); | |
596 | } | |
597 | ||
598 | /* data polling for D7 */ | |
599 | start = get_timer (0); | |
600 | while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) != | |
601 | (data2[i] & (FLASH_WORD_SIZE)0x00800080)) { | |
602 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { | |
603 | return (1); | |
604 | } | |
605 | } | |
606 | } | |
607 | ||
608 | return (0); | |
609 | } | |
610 | ||
611 | /*----------------------------------------------------------------------- */ |