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Merge branch 'fixes' into cleanups
[people/ms/u-boot.git] / board / svm_sc8xx / flash.c
1 /*
2 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22
23 #include <common.h>
24 #include <mpc8xx.h>
25
26 #ifndef CONFIG_ENV_ADDR
27 #define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
28 #endif
29
30 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
31
32 /*-----------------------------------------------------------------------
33 * Functions
34 */
35 static int write_word (flash_info_t *info, ulong dest, ulong data);
36 #if 0
37 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
38 static void flash_get_offsets (ulong base, flash_info_t *info);
39 #endif
40 #ifdef CONFIG_BOOT_8B
41 static int my_in_8( unsigned char *addr);
42 static void my_out_8( unsigned char *addr, int val);
43 #endif
44 #ifdef CONFIG_BOOT_16B
45 static int my_in_be16( unsigned short *addr);
46 static void my_out_be16( unsigned short *addr, int val);
47 #endif
48 #ifdef CONFIG_BOOT_32B
49 static unsigned my_in_be32( unsigned *addr);
50 static void my_out_be32( unsigned *addr, int val);
51 #endif
52 /*-----------------------------------------------------------------------
53 */
54
55 unsigned long flash_init (void)
56 {
57 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
58 volatile memctl8xx_t *memctl = &immap->im_memctl;
59 unsigned long size_b0, size_b1;
60 int i;
61
62 size_b0=0;
63 size_b1=0;
64 /* Init: no FLASHes known */
65 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
66 flash_info[i].flash_id = FLASH_UNKNOWN;
67 }
68 #ifdef CONFIG_SYS_DOC_BASE
69 #ifndef CONFIG_FEL8xx_AT
70 memctl->memc_or5 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC ); /* 32k bytes */
71 memctl->memc_br5 = CONFIG_SYS_DOC_BASE | 0x401;
72 #else
73 memctl->memc_or3 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC ); /* 32k bytes */
74 memctl->memc_br3 = CONFIG_SYS_DOC_BASE | 0x401;
75 #endif
76 #endif
77 #if defined( CONFIG_BOOT_8B)
78 /* memctl->memc_or0 = 0xfff80ff4; /###* 4MB bytes */
79 /* memctl->memc_br0 = 0x40000401; */
80 size_b0 = 0x80000; /* 512 K */
81 flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM040;
82 flash_info[0].sector_count = 8;
83 flash_info[0].size = 0x00080000;
84 /* set up sector start address table */
85 for (i = 0; i < flash_info[0].sector_count; i++)
86 flash_info[0].start[i] = 0x40000000 + (i * 0x10000);
87 /* protect all sectors */
88 for (i = 0; i < flash_info[0].sector_count; i++)
89 flash_info[0].protect[i] = 0x1;
90 #elif defined (CONFIG_BOOT_16B)
91 /* memctl->memc_or0 = 0xfff80ff4; /###* 4MB bytes */
92 /* memctl->memc_br0 = 0x40000401; */
93 size_b0 = 0x400000; /* 4MB , assume AMD29LV320B */
94 flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM320B;
95 flash_info[0].sector_count = 67;
96 flash_info[0].size = 0x00400000;
97 /* set up sector start address table */
98 flash_info[0].start[0] = 0x40000000 ;
99 flash_info[0].start[1] = 0x40000000 + 0x4000;
100 flash_info[0].start[2] = 0x40000000 + 0x6000;
101 flash_info[0].start[3] = 0x40000000 + 0x8000;
102 for (i = 4; i < flash_info[0].sector_count; i++)
103 flash_info[0].start[i] = 0x40000000 + 0x10000 + ((i-4) * 0x10000);
104 /* protect all sectors */
105 for (i = 0; i < flash_info[0].sector_count; i++)
106 flash_info[0].protect[i] = 0x1;
107 #endif
108
109
110 #ifdef CONFIG_BOOT_32B
111
112 /* Static FLASH Bank configuration here - FIXME XXX */
113
114 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
115
116 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
117 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
118 size_b0, size_b0<<20);
119 }
120
121 size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
122
123 if (size_b1 > size_b0) {
124 printf ("## ERROR: "
125 "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
126 size_b1, size_b1<<20,
127 size_b0, size_b0<<20
128 );
129 flash_info[0].flash_id = FLASH_UNKNOWN;
130 flash_info[1].flash_id = FLASH_UNKNOWN;
131 flash_info[0].sector_count = -1;
132 flash_info[1].sector_count = -1;
133 flash_info[0].size = 0;
134 flash_info[1].size = 0;
135 return (0);
136 }
137
138 /* Remap FLASH according to real size */
139 memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
140 memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
141
142 /* Re-do sizing to get full correct info */
143 size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
144
145 flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
146
147 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
148 /* monitor protection ON by default */
149 flash_protect(FLAG_PROTECT_SET,
150 CONFIG_SYS_MONITOR_BASE,
151 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
152 &flash_info[0]);
153 #endif
154
155 #ifdef CONFIG_ENV_IS_IN_FLASH
156 /* ENV protection ON by default */
157 flash_protect(FLAG_PROTECT_SET,
158 CONFIG_ENV_ADDR,
159 CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
160 &flash_info[0]);
161 #endif
162
163 if (size_b1) {
164 memctl->memc_or1 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
165 memctl->memc_br1 = ((CONFIG_SYS_FLASH_BASE + size_b0) & BR_BA_MSK) |
166 BR_MS_GPCM | BR_V;
167
168 /* Re-do sizing to get full correct info */
169 size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + size_b0),
170 &flash_info[1]);
171
172 flash_get_offsets (CONFIG_SYS_FLASH_BASE + size_b0, &flash_info[1]);
173
174 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
175 /* monitor protection ON by default */
176 flash_protect(FLAG_PROTECT_SET,
177 CONFIG_SYS_MONITOR_BASE,
178 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
179 &flash_info[1]);
180 #endif
181
182 #ifdef CONFIG_ENV_IS_IN_FLASH
183 /* ENV protection ON by default */
184 flash_protect(FLAG_PROTECT_SET,
185 CONFIG_ENV_ADDR,
186 CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
187 &flash_info[1]);
188 #endif
189 } else {
190 memctl->memc_br1 = 0; /* invalidate bank */
191
192 flash_info[1].flash_id = FLASH_UNKNOWN;
193 flash_info[1].sector_count = -1;
194 }
195
196 flash_info[0].size = size_b0;
197 flash_info[1].size = size_b1;
198
199
200 #endif /* CONFIG_BOOT_32B */
201
202 return (size_b0 + size_b1);
203 }
204 #if 0
205 /*-----------------------------------------------------------------------
206 */
207 static void flash_get_offsets (ulong base, flash_info_t *info)
208 {
209 int i;
210
211 /* set up sector start address table */
212 if (info->flash_id & FLASH_BTYPE) {
213 /* set sector offsets for bottom boot block type */
214 info->start[0] = base + 0x00000000;
215 info->start[1] = base + 0x00008000;
216 info->start[2] = base + 0x0000C000;
217 info->start[3] = base + 0x00010000;
218 for (i = 4; i < info->sector_count; i++) {
219 info->start[i] = base + (i * 0x00020000) - 0x00060000;
220 }
221 } else {
222 /* set sector offsets for top boot block type */
223 i = info->sector_count - 1;
224 info->start[i--] = base + info->size - 0x00008000;
225 info->start[i--] = base + info->size - 0x0000C000;
226 info->start[i--] = base + info->size - 0x00010000;
227 for (; i >= 0; i--) {
228 info->start[i] = base + i * 0x00020000;
229 }
230 }
231 }
232 #endif
233 /*-----------------------------------------------------------------------
234 */
235 void flash_print_info (flash_info_t *info)
236 {
237 int i;
238
239 if (info->flash_id == FLASH_UNKNOWN) {
240 printf ("missing or unknown FLASH type\n");
241 return;
242 }
243
244 switch (info->flash_id & FLASH_VENDMASK) {
245 case FLASH_MAN_AMD: printf ("AMD "); break;
246 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
247 default: printf ("Unknown Vendor "); break;
248 }
249
250 switch (info->flash_id & FLASH_TYPEMASK) {
251 case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
252 break;
253 case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
254 break;
255 case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
256 break;
257 case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
258 break;
259 case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
260 break;
261 case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
262 break;
263 case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
264 break;
265 case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
266 break;
267 default: 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",
279 info->start[i],
280 info->protect[i] ? " (RO)" : " "
281 );
282 }
283 printf ("\n");
284 return;
285 }
286
287 /*-----------------------------------------------------------------------
288 */
289
290
291 /*-----------------------------------------------------------------------
292 */
293
294 /*
295 * The following code cannot be run from FLASH!
296 */
297 #if 0
298 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
299 {
300 short i;
301 ulong value;
302 ulong base = (ulong)addr;
303
304 /* Write auto select command: read Manufacturer ID */
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:
313 info->flash_id = FLASH_MAN_AMD;
314 break;
315 case FUJ_MANUFACT:
316 info->flash_id = FLASH_MAN_FUJ;
317 break;
318 default:
319 info->flash_id = FLASH_UNKNOWN;
320 info->sector_count = 0;
321 info->size = 0;
322 return (0); /* no or unknown flash */
323 }
324
325 value = addr[1]; /* device ID */
326
327 switch (value) {
328 case AMD_ID_LV400T:
329 info->flash_id += FLASH_AM400T;
330 info->sector_count = 11;
331 info->size = 0x00100000;
332 break; /* => 1 MB */
333
334 case AMD_ID_LV400B:
335 info->flash_id += FLASH_AM400B;
336 info->sector_count = 11;
337 info->size = 0x00100000;
338 break; /* => 1 MB */
339
340 case AMD_ID_LV800T:
341 info->flash_id += FLASH_AM800T;
342 info->sector_count = 19;
343 info->size = 0x00200000;
344 break; /* => 2 MB */
345
346 case AMD_ID_LV800B:
347 info->flash_id += FLASH_AM800B;
348 info->sector_count = 19;
349 info->size = 0x00200000;
350 break; /* => 2 MB */
351
352 case AMD_ID_LV160T:
353 info->flash_id += FLASH_AM160T;
354 info->sector_count = 35;
355 info->size = 0x00400000;
356 break; /* => 4 MB */
357
358 case AMD_ID_LV160B:
359 info->flash_id += FLASH_AM160B;
360 info->sector_count = 35;
361 info->size = 0x00400000;
362 break; /* => 4 MB */
363 #if 0 /* enable when device IDs are available */
364 case AMD_ID_LV320T:
365 info->flash_id += FLASH_AM320T;
366 info->sector_count = 67;
367 info->size = 0x00800000;
368 break; /* => 8 MB */
369
370 case AMD_ID_LV320B:
371 info->flash_id += FLASH_AM320B;
372 info->sector_count = 67;
373 info->size = 0x00800000;
374 break; /* => 8 MB */
375 #endif
376 default:
377 info->flash_id = FLASH_UNKNOWN;
378 return (0); /* => no or unknown flash */
379 }
380
381 /* set up sector start address table */
382 if (info->flash_id & FLASH_BTYPE) {
383 /* set sector offsets for bottom boot block type */
384 info->start[0] = base + 0x00000000;
385 info->start[1] = base + 0x00008000;
386 info->start[2] = base + 0x0000C000;
387 info->start[3] = base + 0x00010000;
388 for (i = 4; i < info->sector_count; i++) {
389 info->start[i] = base + (i * 0x00020000) - 0x00060000;
390 }
391 } else {
392 /* set sector offsets for top boot block type */
393 i = info->sector_count - 1;
394 info->start[i--] = base + info->size - 0x00008000;
395 info->start[i--] = base + info->size - 0x0000C000;
396 info->start[i--] = base + info->size - 0x00010000;
397 for (; i >= 0; i--) {
398 info->start[i] = base + i * 0x00020000;
399 }
400 }
401
402 /* check for protected sectors */
403 for (i = 0; i < info->sector_count; i++) {
404 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
405 /* D0 = 1 if protected */
406 addr = (volatile unsigned long *)(info->start[i]);
407 info->protect[i] = addr[2] & 1;
408 }
409
410 /*
411 * Prevent writes to uninitialized FLASH.
412 */
413 if (info->flash_id != FLASH_UNKNOWN) {
414 addr = (volatile unsigned long *)info->start[0];
415
416 *addr = 0x00F000F0; /* reset bank */
417 }
418
419 return (info->size);
420 }
421 #endif
422
423 /*-----------------------------------------------------------------------
424 */
425
426 int flash_erase (flash_info_t *info, int s_first, int s_last)
427 {
428 vu_long *addr = (vu_long*)(info->start[0]);
429 int flag, prot, sect, l_sect,in_mid,in_did;
430 ulong start, now, last;
431
432 if ((s_first < 0) || (s_first > s_last)) {
433 if (info->flash_id == FLASH_UNKNOWN) {
434 printf ("- missing\n");
435 } else {
436 printf ("- no sectors to erase\n");
437 }
438 return 1;
439 }
440
441 if ((info->flash_id == FLASH_UNKNOWN) ||
442 (info->flash_id > FLASH_AMD_COMP)) {
443 printf ("Can't erase unknown flash type %08lx - aborted\n",
444 info->flash_id);
445 return 1;
446 }
447
448 prot = 0;
449 for (sect=s_first; sect<=s_last; ++sect) {
450 if (info->protect[sect]) {
451 prot++;
452 }
453 }
454
455 if (prot) {
456 printf ("- Warning: %d protected sectors will not be erased!\n",
457 prot);
458 } else {
459 printf ("\n");
460 }
461
462 l_sect = -1;
463
464 /* Disable interrupts which might cause a timeout here */
465 flag = disable_interrupts();
466 #if defined (CONFIG_BOOT_8B )
467 my_out_8( (unsigned char * ) ((ulong)addr+0x555) , 0xaa );
468 my_out_8( (unsigned char * ) ((ulong)addr+0x2aa) , 0x55 );
469 my_out_8( (unsigned char * ) ((ulong)addr+0x555) , 0x90 );
470 in_mid=my_in_8( (unsigned char * ) addr );
471 in_did=my_in_8( (unsigned char * ) ((ulong)addr+1) );
472 printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
473 my_out_8( (unsigned char *)addr, 0xf0);
474 udelay(1);
475 my_out_8( (unsigned char *) ((ulong)addr+0x555),0xaa );
476 my_out_8( (unsigned char *) ((ulong)addr+0x2aa),0x55 );
477 my_out_8( (unsigned char *) ((ulong)addr+0x555),0x80 );
478 my_out_8( (unsigned char *) ((ulong)addr+0x555),0xaa );
479 my_out_8( (unsigned char *) ((ulong)addr+0x2aa),0x55 );
480 /* Start erase on unprotected sectors */
481 for (sect = s_first; sect<=s_last; sect++) {
482 if (info->protect[sect] == 0) { /* not protected */
483 addr = (vu_long*)(info->start[sect]);
484 /*addr[0] = 0x00300030; */
485 my_out_8( (unsigned char *) ((ulong)addr),0x30 );
486 l_sect = sect;
487 }
488 }
489 #elif defined(CONFIG_BOOT_16B )
490 my_out_be16( (unsigned short * ) ((ulong)addr+ (0xaaa)) , 0xaa );
491 my_out_be16( (unsigned short * ) ((ulong)addr+ (0x554)) , 0x55 );
492 my_out_be16( (unsigned short * ) ((ulong)addr+ (0xaaa)) , 0x90 );
493 in_mid=my_in_be16( (unsigned short * ) addr );
494 in_did=my_in_be16 ( (unsigned short * ) ((ulong)addr+2) );
495 printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
496 my_out_be16( (unsigned short *)addr, 0xf0);
497 udelay(1);
498 my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xaa );
499 my_out_be16( (unsigned short *) ((ulong)addr+0x554),0x55 );
500 my_out_be16( (unsigned short *) ((ulong)addr+0xaaa),0x80 );
501 my_out_be16( (unsigned short *) ((ulong)addr+0xaaa),0xaa );
502 my_out_be16( (unsigned short *) ((ulong)addr+0x554),0x55 );
503 /* Start erase on unprotected sectors */
504 for (sect = s_first; sect<=s_last; sect++) {
505 if (info->protect[sect] == 0) { /* not protected */
506 addr = (vu_long*)(info->start[sect]);
507 my_out_be16( (unsigned short *) ((ulong)addr),0x30 );
508 l_sect = sect;
509 }
510 }
511
512 #elif defined(CONFIG_BOOT_32B)
513 my_out_be32( (unsigned * ) ((ulong)addr+0x1554) , 0xaa );
514 my_out_be32( (unsigned * ) ((ulong)addr+0xaa8) , 0x55 );
515 my_out_be32( (unsigned *) ((ulong)addr+0x1554) , 0x90 );
516 in_mid=my_in_be32( (unsigned * ) addr );
517 in_did=my_in_be32( (unsigned * ) ((ulong)addr+4) );
518 printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
519 my_out_be32( (unsigned *)addr, 0xf0);
520 udelay(1);
521 my_out_be32( (unsigned *) ((ulong)addr+0x1554),0xaa );
522 my_out_be32( (unsigned *) ((ulong)addr+0xaa8),0x55 );
523 my_out_be32( (unsigned *) ((ulong)addr+0x1554),0x80 );
524 my_out_be32( (unsigned *) ((ulong)addr+0x1554),0xaa );
525 my_out_be32( (unsigned *) ((ulong)addr+0xaa8),0x55 );
526 /* Start erase on unprotected sectors */
527 for (sect = s_first; sect<=s_last; sect++) {
528 if (info->protect[sect] == 0) { /* not protected */
529 addr = (vu_long*)(info->start[sect]);
530 my_out_be32( (unsigned *) ((ulong)addr),0x00300030 );
531 l_sect = sect;
532 }
533 }
534
535 #else
536 # error CONFIG_BOOT_(size)B missing.
537 #endif
538 /* re-enable interrupts if necessary */
539 if (flag)
540 enable_interrupts();
541
542 /* wait at least 80us - let's wait 1 ms */
543 udelay (1000);
544
545 /*
546 * We wait for the last triggered sector
547 */
548 if (l_sect < 0)
549 goto DONE;
550
551 start = get_timer (0);
552 last = start;
553 addr = (vu_long*)(info->start[l_sect]);
554 #if defined (CONFIG_BOOT_8B)
555 while ( (my_in_8((unsigned char *)addr) & 0x80) != 0x80 )
556 #elif defined(CONFIG_BOOT_16B )
557 while ( (my_in_be16((unsigned short *)addr) & 0x0080) != 0x0080 )
558 #elif defined(CONFIG_BOOT_32B)
559 while ( (my_in_be32((unsigned *)addr) & 0x00800080) != 0x00800080 )
560 #else
561 # error CONFIG_BOOT_(size)B missing.
562 #endif
563 {
564 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
565 printf ("Timeout\n");
566 return 1;
567 }
568 /* show that we're waiting */
569 if ((now - last) > 1000) { /* every second */
570 putc ('.');
571 last = now;
572 }
573 }
574 DONE:
575 /* reset to read mode */
576 addr = (volatile unsigned long *)info->start[0];
577 #if defined (CONFIG_BOOT_8B)
578 my_out_8( (unsigned char *)addr, 0xf0);
579 #elif defined(CONFIG_BOOT_16B )
580 my_out_be16( (unsigned short * ) addr , 0x00f0 );
581 #elif defined(CONFIG_BOOT_32B)
582 my_out_be32 ( (unsigned *)addr, 0x00F000F0 ); /* reset bank */
583 #else
584 # error CONFIG_BOOT_(size)B missing.
585 #endif
586 printf (" done\n");
587 return 0;
588 }
589
590 /*-----------------------------------------------------------------------
591 * Copy memory to flash, returns:
592 * 0 - OK
593 * 1 - write timeout
594 * 2 - Flash not erased
595 */
596
597 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
598 {
599 ulong cp, wp, data;
600 int i, l, rc;
601
602 wp = (addr & ~3); /* get lower word aligned address */
603
604 /*
605 * handle unaligned start bytes
606 */
607 if ((l = addr - wp) != 0) {
608 data = 0;
609 for (i=0, cp=wp; i<l; ++i, ++cp) {
610 data = (data << 8) | (*(uchar *)cp);
611 }
612 for (; i<4 && cnt>0; ++i) {
613 data = (data << 8) | *src++;
614 --cnt;
615 ++cp;
616 }
617 for (; cnt==0 && i<4; ++i, ++cp) {
618 data = (data << 8) | (*(uchar *)cp);
619 }
620
621 if ((rc = write_word(info, wp, data)) != 0) {
622 return (rc);
623 }
624 wp += 4;
625 }
626
627 /*
628 * handle word aligned part
629 */
630 while (cnt >= 4) {
631 data = 0;
632 for (i=0; i<4; ++i) {
633 data = (data << 8) | *src++;
634 }
635 if ((rc = write_word(info, wp, data)) != 0) {
636 return (rc);
637 }
638 wp += 4;
639 cnt -= 4;
640 }
641
642 if (cnt == 0) {
643 return (0);
644 }
645
646 /*
647 * handle unaligned tail bytes
648 */
649 data = 0;
650 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
651 data = (data << 8) | *src++;
652 --cnt;
653 }
654 for (; i<4; ++i, ++cp) {
655 data = (data << 8) | (*(uchar *)cp);
656 }
657
658 return (write_word(info, wp, data));
659 }
660
661 /*-----------------------------------------------------------------------
662 * Write a word to Flash, returns:
663 * 0 - OK
664 * 1 - write timeout
665 * 2 - Flash not erased
666 */
667 static int write_word (flash_info_t *info, ulong dest, ulong data)
668 {
669 ulong addr = (ulong)(info->start[0]);
670 ulong start,last;
671 int flag;
672 ulong i;
673 int data_short[2];
674
675 /* Check if Flash is (sufficiently) erased */
676 if ( ((ulong) *(ulong *)dest & data) != data ) {
677 return (2);
678 }
679 /* Disable interrupts which might cause a timeout here */
680 flag = disable_interrupts();
681 #if defined(CONFIG_BOOT_8B)
682 #ifdef DEBUG
683 {
684 int in_mid,in_did;
685 my_out_8( (unsigned char * ) (addr+0x555) , 0xaa );
686 my_out_8( (unsigned char * ) (addr+0x2aa) , 0x55 );
687 my_out_8( (unsigned char * ) (addr+0x555) , 0x90 );
688 in_mid=my_in_8( (unsigned char * ) addr );
689 in_did=my_in_8( (unsigned char * ) (addr+1) );
690 printf(" man ID=0x%x, dev ID=0x%x.\n",in_mid,in_did );
691 my_out_8( (unsigned char *)addr, 0xf0);
692 udelay(1);
693 }
694 #endif
695 {
696 int data_ch[4];
697 data_ch[0]=(int ) ((data>>24) & 0xff);
698 data_ch[1]=(int ) ((data>>16) &0xff );
699 data_ch[2]=(int ) ((data >>8) & 0xff);
700 data_ch[3]=(int ) (data & 0xff);
701 for (i=0;i<4;i++ ){
702 my_out_8( (unsigned char *) (addr+0x555),0xaa);
703 my_out_8((unsigned char *) (addr+0x2aa),0x55);
704 my_out_8( (unsigned char *) (addr+0x555),0xa0);
705 my_out_8((unsigned char *) (dest+i) ,data_ch[i]);
706 /* re-enable interrupts if necessary */
707 if (flag)
708 enable_interrupts();
709
710 start = get_timer (0);
711 last = start;
712 while( ( my_in_8((unsigned char *) (dest+i)) ) != ( data_ch[i] ) ) {
713 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT ) {
714 return 1;
715 }
716 }
717 }/* for */
718 }
719 #elif defined( CONFIG_BOOT_16B)
720 data_short[0]=(int) (data>>16) & 0xffff;
721 data_short[1]=(int ) data & 0xffff ;
722 for (i=0;i<2;i++ ){
723 my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xaa );
724 my_out_be16( (unsigned short *) ((ulong)addr+ 0x554),0x55 );
725 my_out_be16( (unsigned short *) ((ulong)addr+ 0xaaa),0xa0 );
726 my_out_be16( (unsigned short *) (dest+(i*2)) ,data_short[i]);
727 /* re-enable interrupts if necessary */
728 if (flag)
729 enable_interrupts();
730 start = get_timer (0);
731 last = start;
732 while( ( my_in_be16((unsigned short *) (dest+(i*2))) ) != ( data_short[i] ) ) {
733 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT ) {
734 return 1;
735 }
736 }
737 }
738 #elif defined( CONFIG_BOOT_32B)
739 addr[0x0555] = 0x00AA00AA;
740 addr[0x02AA] = 0x00550055;
741 addr[0x0555] = 0x00A000A0;
742
743 *((vu_long *)dest) = data;
744
745 /* re-enable interrupts if necessary */
746 if (flag)
747 enable_interrupts();
748
749 /* data polling for D7 */
750 start = get_timer (0);
751 while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
752 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
753 return (1);
754 }
755 }
756 #endif
757
758
759 return (0);
760 }
761 #ifdef CONFIG_BOOT_8B
762 static int my_in_8 ( unsigned char *addr)
763 {
764 int ret;
765 __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
766 return ret;
767 }
768
769 static void my_out_8 ( unsigned char *addr, int val)
770 {
771 __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
772 }
773 #endif
774 #ifdef CONFIG_BOOT_16B
775 static int my_in_be16( unsigned short *addr)
776 {
777 int ret;
778 __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
779 return ret;
780 }
781 static void my_out_be16( unsigned short *addr, int val)
782 {
783 __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
784 }
785 #endif
786 #ifdef CONFIG_BOOT_32B
787 static unsigned my_in_be32( unsigned *addr)
788 {
789 unsigned ret;
790 __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
791 return ret;
792 }
793 static void my_out_be32( unsigned *addr, int val)
794 {
795 __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
796 }
797 #endif
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