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wdenkc0218802003-03-27 12:09:35 +00001/*
2 * (C) Copyright 2003
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 <asm/inca-ip.h>
26
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020027flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
wdenkc0218802003-03-27 12:09:35 +000028
29/* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
30 * has nothing to do with the flash chip being 8-bit or 16-bit.
31 */
32#ifdef CONFIG_FLASH_16BIT
33typedef unsigned short FLASH_PORT_WIDTH;
34typedef volatile unsigned short FLASH_PORT_WIDTHV;
35#define FLASH_ID_MASK 0xFFFF
36#else
37typedef unsigned long FLASH_PORT_WIDTH;
38typedef volatile unsigned long FLASH_PORT_WIDTHV;
39#define FLASH_ID_MASK 0xFFFFFFFF
40#endif
41
42#define FPW FLASH_PORT_WIDTH
43#define FPWV FLASH_PORT_WIDTHV
44
45#define ORMASK(size) ((-size) & OR_AM_MSK)
46
47#if 0
48#define FLASH_CYCLE1 0x0555
49#define FLASH_CYCLE2 0x02aa
50#else
51#define FLASH_CYCLE1 0x0554
52#define FLASH_CYCLE2 0x02ab
53#endif
54
55/*-----------------------------------------------------------------------
56 * Functions
57 */
58static ulong flash_get_size(FPWV *addr, flash_info_t *info);
59static void flash_reset(flash_info_t *info);
60static int write_word_intel(flash_info_t *info, FPWV *dest, FPW data);
61static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
62static void flash_get_offsets(ulong base, flash_info_t *info);
63static flash_info_t *flash_get_info(ulong base);
64
65/*-----------------------------------------------------------------------
66 * flash_init()
67 *
68 * sets up flash_info and returns size of FLASH (bytes)
69 */
70unsigned long flash_init (void)
71{
72 unsigned long size = 0;
73 int i;
74
75 /* Init: no FLASHes known */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020076 for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
wdenkc0218802003-03-27 12:09:35 +000077 ulong flashbase = (i == 0) ? PHYS_FLASH_1 : PHYS_FLASH_2;
78 ulong * buscon = (ulong *)
79 ((i == 0) ? INCA_IP_EBU_EBU_BUSCON0 : INCA_IP_EBU_EBU_BUSCON2);
80
81 /* Disable write protection */
82 *buscon &= ~INCA_IP_EBU_EBU_BUSCON1_WRDIS;
83
84#if 1
85 memset(&flash_info[i], 0, sizeof(flash_info_t));
86#endif
87
wdenk8bde7f72003-06-27 21:31:46 +000088 flash_info[i].size =
wdenkc0218802003-03-27 12:09:35 +000089 flash_get_size((FPW *)flashbase, &flash_info[i]);
90
91 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
92 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx\n",
93 i, flash_info[i].size);
94 }
wdenk8bde7f72003-06-27 21:31:46 +000095
wdenkc0218802003-03-27 12:09:35 +000096 size += flash_info[i].size;
97 }
98
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020099#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
wdenkc0218802003-03-27 12:09:35 +0000100 /* monitor protection ON by default */
101 flash_protect(FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200102 CONFIG_SYS_MONITOR_BASE,
103 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
104 flash_get_info(CONFIG_SYS_MONITOR_BASE));
wdenkc0218802003-03-27 12:09:35 +0000105#endif
106
Jean-Christophe PLAGNIOL-VILLARD5a1aceb2008-09-10 22:48:04 +0200107#ifdef CONFIG_ENV_IS_IN_FLASH
wdenkc0218802003-03-27 12:09:35 +0000108 /* ENV protection ON by default */
109 flash_protect(FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200110 CONFIG_ENV_ADDR,
111 CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
112 flash_get_info(CONFIG_ENV_ADDR));
wdenkc0218802003-03-27 12:09:35 +0000113#endif
114
115
116 return size;
117}
118
119/*-----------------------------------------------------------------------
120 */
121static void flash_reset(flash_info_t *info)
122{
123 FPWV *base = (FPWV *)(info->start[0]);
124
125 /* Put FLASH back in read mode */
126 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
127 *base = (FPW)0x00FF00FF; /* Intel Read Mode */
128 else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
129 *base = (FPW)0x00F000F0; /* AMD Read Mode */
130}
131
132/*-----------------------------------------------------------------------
133 */
134static void flash_get_offsets (ulong base, flash_info_t *info)
135{
136 int i;
137
138 /* set up sector start address table */
139 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL
140 && (info->flash_id & FLASH_BTYPE)) {
141 int bootsect_size; /* number of bytes/boot sector */
142 int sect_size; /* number of bytes/regular sector */
143
144 bootsect_size = 0x00002000 * (sizeof(FPW)/2);
145 sect_size = 0x00010000 * (sizeof(FPW)/2);
146
147 /* set sector offsets for bottom boot block type */
148 for (i = 0; i < 8; ++i) {
149 info->start[i] = base + (i * bootsect_size);
150 }
151 for (i = 8; i < info->sector_count; i++) {
152 info->start[i] = base + ((i - 7) * sect_size);
153 }
154 }
155 else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
156 && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) {
157
158 int sect_size; /* number of bytes/sector */
159
160 sect_size = 0x00010000 * (sizeof(FPW)/2);
161
162 /* set up sector start address table (uniform sector type) */
163 for( i = 0; i < info->sector_count; i++ )
164 info->start[i] = base + (i * sect_size);
165 }
166}
167
168/*-----------------------------------------------------------------------
169 */
170
171static flash_info_t *flash_get_info(ulong base)
172{
173 int i;
174 flash_info_t * info;
wdenk8bde7f72003-06-27 21:31:46 +0000175
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200176 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) {
wdenkc0218802003-03-27 12:09:35 +0000177 info = & flash_info[i];
178 if (info->start[0] <= base && base < info->start[0] + info->size)
179 break;
180 }
wdenk8bde7f72003-06-27 21:31:46 +0000181
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200182 return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info;
wdenkc0218802003-03-27 12:09:35 +0000183}
184
185/*-----------------------------------------------------------------------
186 */
187
188void flash_print_info (flash_info_t *info)
189{
190 int i;
191 uchar *boottype;
192 uchar *bootletter;
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100193 char *fmt;
wdenkc0218802003-03-27 12:09:35 +0000194 uchar botbootletter[] = "B";
195 uchar topbootletter[] = "T";
196 uchar botboottype[] = "bottom boot sector";
197 uchar topboottype[] = "top boot sector";
198
199 if (info->flash_id == FLASH_UNKNOWN) {
200 printf ("missing or unknown FLASH type\n");
201 return;
202 }
203
204 switch (info->flash_id & FLASH_VENDMASK) {
205 case FLASH_MAN_AMD: printf ("AMD "); break;
206 case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
207 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
208 case FLASH_MAN_SST: printf ("SST "); break;
209 case FLASH_MAN_STM: printf ("STM "); break;
210 case FLASH_MAN_INTEL: printf ("INTEL "); break;
211 default: printf ("Unknown Vendor "); break;
212 }
213
214 /* check for top or bottom boot, if it applies */
215 if (info->flash_id & FLASH_BTYPE) {
216 boottype = botboottype;
217 bootletter = botbootletter;
218 }
219 else {
220 boottype = topboottype;
221 bootletter = topbootletter;
222 }
223
224 switch (info->flash_id & FLASH_TYPEMASK) {
225 case FLASH_AM640U:
226 fmt = "29LV641D (64 Mbit, uniform sectors)\n";
227 break;
wdenk8bde7f72003-06-27 21:31:46 +0000228 case FLASH_28F800C3B:
229 case FLASH_28F800C3T:
wdenkc0218802003-03-27 12:09:35 +0000230 fmt = "28F800C3%s (8 Mbit, %s)\n";
231 break;
232 case FLASH_INTEL800B:
233 case FLASH_INTEL800T:
234 fmt = "28F800B3%s (8 Mbit, %s)\n";
235 break;
wdenk8bde7f72003-06-27 21:31:46 +0000236 case FLASH_28F160C3B:
237 case FLASH_28F160C3T:
wdenkc0218802003-03-27 12:09:35 +0000238 fmt = "28F160C3%s (16 Mbit, %s)\n";
239 break;
240 case FLASH_INTEL160B:
241 case FLASH_INTEL160T:
242 fmt = "28F160B3%s (16 Mbit, %s)\n";
243 break;
wdenk8bde7f72003-06-27 21:31:46 +0000244 case FLASH_28F320C3B:
245 case FLASH_28F320C3T:
wdenkc0218802003-03-27 12:09:35 +0000246 fmt = "28F320C3%s (32 Mbit, %s)\n";
247 break;
248 case FLASH_INTEL320B:
249 case FLASH_INTEL320T:
250 fmt = "28F320B3%s (32 Mbit, %s)\n";
251 break;
wdenk8bde7f72003-06-27 21:31:46 +0000252 case FLASH_28F640C3B:
253 case FLASH_28F640C3T:
wdenkc0218802003-03-27 12:09:35 +0000254 fmt = "28F640C3%s (64 Mbit, %s)\n";
255 break;
256 case FLASH_INTEL640B:
257 case FLASH_INTEL640T:
258 fmt = "28F640B3%s (64 Mbit, %s)\n";
259 break;
260 default:
261 fmt = "Unknown Chip Type\n";
262 break;
263 }
264
265 printf (fmt, bootletter, boottype);
266
267 printf (" Size: %ld MB in %d Sectors\n",
268 info->size >> 20,
269 info->sector_count);
270
271 printf (" Sector Start Addresses:");
272
273 for (i=0; i<info->sector_count; ++i) {
274 if ((i % 5) == 0) {
275 printf ("\n ");
276 }
277
278 printf (" %08lX%s", info->start[i],
279 info->protect[i] ? " (RO)" : " ");
280 }
281
282 printf ("\n");
283}
284
285/*-----------------------------------------------------------------------
286 */
287
288/*
289 * The following code cannot be run from FLASH!
290 */
291
292ulong flash_get_size (FPWV *addr, flash_info_t *info)
293{
294 /* Write auto select command: read Manufacturer ID */
295
296 /* Write auto select command sequence and test FLASH answer */
297 addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */
298 addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */
299 addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */
300
301 /* The manufacturer codes are only 1 byte, so just use 1 byte.
302 * This works for any bus width and any FLASH device width.
303 */
304 switch (addr[1] & 0xff) {
305
306 case (uchar)AMD_MANUFACT:
307 info->flash_id = FLASH_MAN_AMD;
308 break;
309
310 case (uchar)INTEL_MANUFACT:
311 info->flash_id = FLASH_MAN_INTEL;
312 break;
313
314 default:
315 info->flash_id = FLASH_UNKNOWN;
316 info->sector_count = 0;
317 info->size = 0;
318 break;
319 }
320
321 /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
322 if (info->flash_id != FLASH_UNKNOWN) switch (addr[0]) {
323
324 case (FPW)AMD_ID_LV640U: /* 29LV640 and 29LV641 have same ID */
325 info->flash_id += FLASH_AM640U;
326 info->sector_count = 128;
327 info->size = 0x00800000 * (sizeof(FPW)/2);
328 break; /* => 8 or 16 MB */
329
330 case (FPW)INTEL_ID_28F800C3B:
331 info->flash_id += FLASH_28F800C3B;
332 info->sector_count = 23;
333 info->size = 0x00100000 * (sizeof(FPW)/2);
334 break; /* => 1 or 2 MB */
335
336 case (FPW)INTEL_ID_28F800B3B:
337 info->flash_id += FLASH_INTEL800B;
338 info->sector_count = 23;
339 info->size = 0x00100000 * (sizeof(FPW)/2);
340 break; /* => 1 or 2 MB */
341
342 case (FPW)INTEL_ID_28F160C3B:
343 info->flash_id += FLASH_28F160C3B;
344 info->sector_count = 39;
345 info->size = 0x00200000 * (sizeof(FPW)/2);
346 break; /* => 2 or 4 MB */
347
348 case (FPW)INTEL_ID_28F160B3B:
349 info->flash_id += FLASH_INTEL160B;
350 info->sector_count = 39;
351 info->size = 0x00200000 * (sizeof(FPW)/2);
352 break; /* => 2 or 4 MB */
353
354 case (FPW)INTEL_ID_28F320C3B:
355 info->flash_id += FLASH_28F320C3B;
356 info->sector_count = 71;
357 info->size = 0x00400000 * (sizeof(FPW)/2);
358 break; /* => 4 or 8 MB */
359
360 case (FPW)INTEL_ID_28F320B3B:
361 info->flash_id += FLASH_INTEL320B;
362 info->sector_count = 71;
363 info->size = 0x00400000 * (sizeof(FPW)/2);
364 break; /* => 4 or 8 MB */
365
366 case (FPW)INTEL_ID_28F640C3B:
367 info->flash_id += FLASH_28F640C3B;
368 info->sector_count = 135;
369 info->size = 0x00800000 * (sizeof(FPW)/2);
370 break; /* => 8 or 16 MB */
371
372 case (FPW)INTEL_ID_28F640B3B:
373 info->flash_id += FLASH_INTEL640B;
374 info->sector_count = 135;
375 info->size = 0x00800000 * (sizeof(FPW)/2);
376 break; /* => 8 or 16 MB */
377
378 default:
379 info->flash_id = FLASH_UNKNOWN;
380 info->sector_count = 0;
381 info->size = 0;
382 return (0); /* => no or unknown flash */
383 }
384
385 flash_get_offsets((ulong)addr, info);
386
387 /* Put FLASH back in read mode */
388 flash_reset(info);
389
390 return (info->size);
391}
392
393/*-----------------------------------------------------------------------
394 */
395
396int flash_erase (flash_info_t *info, int s_first, int s_last)
397{
398 FPWV *addr;
399 int flag, prot, sect;
400 int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
401 ulong start, now, last;
402 int rcode = 0;
403
404 if ((s_first < 0) || (s_first > s_last)) {
405 if (info->flash_id == FLASH_UNKNOWN) {
406 printf ("- missing\n");
407 } else {
408 printf ("- no sectors to erase\n");
409 }
410 return 1;
411 }
412
413 switch (info->flash_id & FLASH_TYPEMASK) {
414 case FLASH_INTEL800B:
415 case FLASH_INTEL160B:
416 case FLASH_INTEL320B:
417 case FLASH_INTEL640B:
418 case FLASH_28F800C3B:
419 case FLASH_28F160C3B:
420 case FLASH_28F320C3B:
421 case FLASH_28F640C3B:
422 case FLASH_AM640U:
423 break;
424 case FLASH_UNKNOWN:
425 default:
426 printf ("Can't erase unknown flash type %08lx - aborted\n",
427 info->flash_id);
428 return 1;
429 }
430
431 prot = 0;
432 for (sect=s_first; sect<=s_last; ++sect) {
433 if (info->protect[sect]) {
434 prot++;
435 }
436 }
437
438 if (prot) {
439 printf ("- Warning: %d protected sectors will not be erased!\n",
440 prot);
441 } else {
442 printf ("\n");
443 }
444
445 last = get_timer(0);
446
447 /* Start erase on unprotected sectors */
448 for (sect = s_first; sect<=s_last && rcode == 0; sect++) {
449
450 if (info->protect[sect] != 0) /* protected, skip it */
451 continue;
452
453 /* Disable interrupts which might cause a timeout here */
454 flag = disable_interrupts();
455
456 addr = (FPWV *)(info->start[sect]);
457 if (intel) {
458 *addr = (FPW)0x00500050; /* clear status register */
459 *addr = (FPW)0x00200020; /* erase setup */
460 *addr = (FPW)0x00D000D0; /* erase confirm */
461 }
462 else {
463 /* must be AMD style if not Intel */
464 FPWV *base; /* first address in bank */
465
466 base = (FPWV *)(info->start[0]);
467 base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
468 base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
469 base[FLASH_CYCLE1] = (FPW)0x00800080; /* erase mode */
470 base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
471 base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
472 *addr = (FPW)0x00300030; /* erase sector */
473 }
474
475 /* re-enable interrupts if necessary */
476 if (flag)
477 enable_interrupts();
478
479 start = get_timer(0);
480
481 /* wait at least 50us for AMD, 80us for Intel.
482 * Let's wait 1 ms.
483 */
484 udelay (1000);
485
486 while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200487 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
wdenkc0218802003-03-27 12:09:35 +0000488 printf ("Timeout\n");
489
490 if (intel) {
491 /* suspend erase */
492 *addr = (FPW)0x00B000B0;
493 }
494
495 flash_reset(info); /* reset to read mode */
496 rcode = 1; /* failed */
497 break;
498 }
499
500 /* show that we're waiting */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200501 if ((get_timer(last)) > CONFIG_SYS_HZ) {/* every second */
wdenkc0218802003-03-27 12:09:35 +0000502 putc ('.');
503 last = get_timer(0);
504 }
505 }
506
507 /* show that we're waiting */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200508 if ((get_timer(last)) > CONFIG_SYS_HZ) { /* every second */
wdenkc0218802003-03-27 12:09:35 +0000509 putc ('.');
510 last = get_timer(0);
511 }
512
513 flash_reset(info); /* reset to read mode */
514 }
515
516 printf (" done\n");
517 return rcode;
518}
519
520/*-----------------------------------------------------------------------
521 * Copy memory to flash, returns:
522 * 0 - OK
523 * 1 - write timeout
524 * 2 - Flash not erased
525 */
526int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
527{
528 FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
529 int bytes; /* number of bytes to program in current word */
530 int left; /* number of bytes left to program */
531 int i, res;
532
533 for (left = cnt, res = 0;
534 left > 0 && res == 0;
535 addr += sizeof(data), left -= sizeof(data) - bytes) {
536
wdenk8bde7f72003-06-27 21:31:46 +0000537 bytes = addr & (sizeof(data) - 1);
538 addr &= ~(sizeof(data) - 1);
wdenkc0218802003-03-27 12:09:35 +0000539
540 /* combine source and destination data so can program
541 * an entire word of 16 or 32 bits
542 */
wdenk8bde7f72003-06-27 21:31:46 +0000543 for (i = 0; i < sizeof(data); i++) {
544 data <<= 8;
545 if (i < bytes || i - bytes >= left )
wdenkc0218802003-03-27 12:09:35 +0000546 data += *((uchar *)addr + i);
547 else
548 data += *src++;
549 }
550
551 /* write one word to the flash */
552 switch (info->flash_id & FLASH_VENDMASK) {
553 case FLASH_MAN_AMD:
554 res = write_word_amd(info, (FPWV *)addr, data);
555 break;
556 case FLASH_MAN_INTEL:
557 res = write_word_intel(info, (FPWV *)addr, data);
558 break;
559 default:
560 /* unknown flash type, error! */
561 printf ("missing or unknown FLASH type\n");
562 res = 1; /* not really a timeout, but gives error */
563 break;
564 }
565 }
566
567 return (res);
568}
569
570/*-----------------------------------------------------------------------
571 * Write a word to Flash for AMD FLASH
572 * A word is 16 or 32 bits, whichever the bus width of the flash bank
573 * (not an individual chip) is.
574 *
575 * returns:
576 * 0 - OK
577 * 1 - write timeout
578 * 2 - Flash not erased
579 */
580static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
581{
582 ulong start;
583 int flag;
584 int res = 0; /* result, assume success */
585 FPWV *base; /* first address in flash bank */
586
587 /* Check if Flash is (sufficiently) erased */
588 if ((*dest & data) != data) {
589 return (2);
590 }
591
592
593 base = (FPWV *)(info->start[0]);
594
595 /* Disable interrupts which might cause a timeout here */
596 flag = disable_interrupts();
597
598 base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */
599 base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */
600 base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */
601
602 *dest = data; /* start programming the data */
603
604 /* re-enable interrupts if necessary */
605 if (flag)
606 enable_interrupts();
607
608 start = get_timer (0);
609
610 /* data polling for D7 */
611 while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200612 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
wdenkc0218802003-03-27 12:09:35 +0000613 *dest = (FPW)0x00F000F0; /* reset bank */
614 res = 1;
615 }
616 }
617
618 return (res);
619}
620
621/*-----------------------------------------------------------------------
622 * Write a word to Flash for Intel FLASH
623 * A word is 16 or 32 bits, whichever the bus width of the flash bank
624 * (not an individual chip) is.
625 *
626 * returns:
627 * 0 - OK
628 * 1 - write timeout
629 * 2 - Flash not erased
630 */
631static int write_word_intel (flash_info_t *info, FPWV *dest, FPW data)
632{
633 ulong start;
634 int flag;
635 int res = 0; /* result, assume success */
636
637 /* Check if Flash is (sufficiently) erased */
638 if ((*dest & data) != data) {
639 return (2);
640 }
641
642 /* Disable interrupts which might cause a timeout here */
643 flag = disable_interrupts();
644
645 *dest = (FPW)0x00500050; /* clear status register */
646 *dest = (FPW)0x00FF00FF; /* make sure in read mode */
647 *dest = (FPW)0x00400040; /* program setup */
648
649 *dest = data; /* start programming the data */
650
651 /* re-enable interrupts if necessary */
652 if (flag)
653 enable_interrupts();
654
655 start = get_timer (0);
656
657 while (res == 0 && (*dest & (FPW)0x00800080) != (FPW)0x00800080) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200658 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
wdenkc0218802003-03-27 12:09:35 +0000659 *dest = (FPW)0x00B000B0; /* Suspend program */
660 res = 1;
661 }
662 }
663
664 if (res == 0 && (*dest & (FPW)0x00100010))
665 res = 1; /* write failed, time out error is close enough */
666
667 *dest = (FPW)0x00500050; /* clear status register */
668 *dest = (FPW)0x00FF00FF; /* make sure in read mode */
669
670 return (res);
671}