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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / board / rmu / flash.c
1 /*
2 * (C) Copyright 2000-2004
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 /* #define DEBUG */
25
26 #include <common.h>
27 #include <mpc8xx.h>
28
29 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
30
31 /*-----------------------------------------------------------------------
32 * Functions
33 */
34 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
35 static int write_word (flash_info_t *info, ulong dest, ulong data);
36 static void flash_get_offsets (ulong base, flash_info_t *info);
37
38 /*-----------------------------------------------------------------------
39 */
40
41 unsigned long flash_init (void)
42 {
43 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
44 volatile memctl8xx_t *memctl = &immap->im_memctl;
45 unsigned long size_b0 ;
46 int i;
47
48 /* Init: no FLASHes known */
49 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
50 flash_info[i].flash_id = FLASH_UNKNOWN;
51 }
52
53 /* Static FLASH Bank configuration here - FIXME XXX */
54
55 debug ("\n## Get flash bank size @ 0x%08x\n", FLASH_BASE_PRELIM);
56
57 size_b0 = flash_get_size((vu_long *)FLASH_BASE_PRELIM, &flash_info[0]);
58 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
59 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
60 size_b0, size_b0<<20);
61 }
62
63 debug ("## Before remap: BR0: 0x%08x OR0: 0x%08x\n",
64 memctl->memc_br0, memctl->memc_or0);
65
66 /* Remap FLASH according to real size */
67 memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
68 memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
69
70 debug ("## BR0: 0x%08x OR0: 0x%08x\n",
71 memctl->memc_br0, memctl->memc_or0);
72
73 /* Re-do sizing to get full correct info */
74
75 size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
76 flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
77
78 /* monitor protection ON by default */
79 flash_protect(FLAG_PROTECT_SET,
80 CONFIG_SYS_MONITOR_BASE,
81 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
82 &flash_info[0]);
83
84 #ifdef CONFIG_ENV_IS_IN_FLASH
85 /* ENV protection ON by default */
86 flash_protect(FLAG_PROTECT_SET,
87 CONFIG_ENV_ADDR,
88 CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
89 &flash_info[0]);
90 #endif
91
92 #if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
93 debug ("Protect redundand environment: %08lx ... %08lx\n",
94 (ulong)CONFIG_ENV_ADDR_REDUND,
95 (ulong)CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE - 1);
96
97 flash_protect(FLAG_PROTECT_SET,
98 CONFIG_ENV_ADDR_REDUND,
99 CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1,
100 &flash_info[0]);
101 #endif
102
103 flash_info[0].size = size_b0;
104
105 debug ("## Final Flash bank size: %08lx\n", size_b0);
106
107 return (size_b0);
108 }
109
110 /*-----------------------------------------------------------------------
111 */
112 static void flash_get_offsets (ulong base, flash_info_t *info)
113 {
114 int i;
115
116 /* set up sector start address table */
117 if (info->flash_id & FLASH_BTYPE) {
118 /* set sector offsets for bottom boot block type */
119 info->start[0] = base + 0x00000000;
120 info->start[1] = base + 0x00010000;
121 info->start[2] = base + 0x00018000;
122 info->start[3] = base + 0x00020000;
123 for (i = 4; i < info->sector_count; i++) {
124 info->start[i] = base + ((i-3) * 0x00040000) ;
125 }
126 } else {
127 /* set sector offsets for top boot block type */
128 i = info->sector_count - 1;
129 info->start[i--] = base + info->size - 0x00010000;
130 info->start[i--] = base + info->size - 0x00018000;
131 info->start[i--] = base + info->size - 0x00020000;
132 for (; i >= 0; i--) {
133 info->start[i] = base + i * 0x00040000;
134 }
135 }
136
137 }
138
139 /*-----------------------------------------------------------------------
140 */
141 void flash_print_info (flash_info_t *info)
142 {
143 int i;
144
145 if (info->flash_id == FLASH_UNKNOWN) {
146 printf ("missing or unknown FLASH type\n");
147 return;
148 }
149
150 switch (info->flash_id & FLASH_VENDMASK) {
151 case FLASH_MAN_AMD: printf ("AMD "); break;
152 case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
153 default: printf ("Unknown Vendor "); break;
154 }
155
156 switch (info->flash_id & FLASH_TYPEMASK) {
157 case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
158 break;
159 case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
160 break;
161 case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
162 break;
163 case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
164 break;
165 case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
166 break;
167 case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
168 break;
169 case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
170 break;
171 case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
172 break;
173 default: printf ("Unknown Chip Type\n");
174 break;
175 }
176
177 printf (" Size: %ld MB in %d Sectors\n",
178 info->size >> 20, info->sector_count);
179
180 printf (" Sector Start Addresses:");
181 for (i=0; i<info->sector_count; ++i) {
182 if ((i % 5) == 0)
183 printf ("\n ");
184 printf (" %08lX%s",
185 info->start[i],
186 info->protect[i] ? " (RO)" : " "
187 );
188 }
189 printf ("\n");
190 return;
191 }
192
193 /*-----------------------------------------------------------------------
194 */
195
196
197 /*-----------------------------------------------------------------------
198 */
199
200 /*
201 * The following code cannot be run from FLASH!
202 */
203
204 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
205 {
206 short i;
207 ulong value;
208 ulong base = (ulong)addr;
209
210 /* Write auto select command: read Manufacturer ID */
211 addr[0xAAA] = 0xAAAAAAAA ;
212 addr[0x555] = 0x55555555 ;
213 addr[0xAAA] = 0x90909090 ;
214
215 value = addr[0] ;
216
217 debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
218
219 switch (value & 0x00FF00FF) {
220 case AMD_MANUFACT:
221 info->flash_id = FLASH_MAN_AMD;
222 break;
223 case FUJ_MANUFACT:
224 info->flash_id = FLASH_MAN_FUJ;
225 break;
226 default:
227 info->flash_id = FLASH_UNKNOWN;
228 info->sector_count = 0;
229 info->size = 0;
230 return (0); /* no or unknown flash */
231 }
232
233 value = addr[2] ; /* device ID */
234
235 debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
236
237 switch (value & 0x00FF00FF) {
238 case (AMD_ID_LV400T & 0x00FF00FF):
239 info->flash_id += FLASH_AM400T;
240 info->sector_count = 11;
241 info->size = 0x00100000;
242 break; /* => 1 MB */
243
244 case (AMD_ID_LV400B & 0x00FF00FF):
245 info->flash_id += FLASH_AM400B;
246 info->sector_count = 11;
247 info->size = 0x00100000;
248 break; /* => 1 MB */
249
250 case (AMD_ID_LV800T & 0x00FF00FF):
251 info->flash_id += FLASH_AM800T;
252 info->sector_count = 19;
253 info->size = 0x00200000;
254 break; /* => 2 MB */
255
256 case (AMD_ID_LV800B & 0x00FF00FF):
257 info->flash_id += FLASH_AM800B;
258 info->sector_count = 19;
259 info->size = 0x00400000; /*%%% Size doubled by yooth */
260 break; /* => 4 MB */
261
262 case (AMD_ID_LV160T & 0x00FF00FF):
263 info->flash_id += FLASH_AM160T;
264 info->sector_count = 35;
265 info->size = 0x00400000;
266 break; /* => 4 MB */
267
268 case (AMD_ID_LV160B & 0x00FF00FF):
269 info->flash_id += FLASH_AM160B;
270 info->sector_count = 35;
271 info->size = 0x00800000;
272 break; /* => 8 MB */
273 case (AMD_ID_LV320T & 0x00FF00FF):
274 info->flash_id += FLASH_AM320T;
275 info->sector_count = 67;
276 info->size = 0x00800000;
277 break; /* => 8 MB */
278
279 case (AMD_ID_LV320B & 0x00FF00FF):
280 info->flash_id += FLASH_AM320B;
281 info->sector_count = 67;
282 info->size = 0x01000000;
283 break; /* => 16 MB */
284 default:
285 info->flash_id = FLASH_UNKNOWN;
286 return (0); /* => no or unknown flash */
287
288 }
289 /* set up sector start address table */
290 if (info->flash_id & FLASH_BTYPE) {
291 /* set sector offsets for bottom boot block type */
292 info->start[0] = base + 0x00000000;
293 info->start[1] = base + 0x00010000;
294 info->start[2] = base + 0x00018000;
295 info->start[3] = base + 0x00020000;
296 for (i = 4; i < info->sector_count; i++) {
297 info->start[i] = base + ((i-3) * 0x00040000) ;
298 }
299 } else {
300 /* set sector offsets for top boot block type */
301 i = info->sector_count - 1;
302 info->start[i--] = base + info->size - 0x00010000;
303 info->start[i--] = base + info->size - 0x00018000;
304 info->start[i--] = base + info->size - 0x00020000;
305 for (; i >= 0; i--) {
306 info->start[i] = base + i * 0x00040000;
307 }
308 }
309
310 /* check for protected sectors */
311 for (i = 0; i < info->sector_count; i++) {
312 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
313 /* D0 = 1 if protected */
314 addr = (volatile unsigned long *)(info->start[i]);
315 info->protect[i] = addr[4] & 1 ;
316 }
317
318 /*
319 * Prevent writes to uninitialized FLASH.
320 */
321 if (info->flash_id != FLASH_UNKNOWN) {
322 addr = (volatile unsigned long *)info->start[0];
323
324 *addr = 0xF0F0F0F0; /* reset bank */
325 }
326
327 return (info->size);
328 }
329
330
331 /*-----------------------------------------------------------------------
332 */
333
334 int flash_erase (flash_info_t *info, int s_first, int s_last)
335 {
336 vu_long *addr = (vu_long*)(info->start[0]);
337 int flag, prot, sect, l_sect;
338 ulong start, now, last;
339
340 debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
341
342 if ((s_first < 0) || (s_first > s_last)) {
343 if (info->flash_id == FLASH_UNKNOWN) {
344 printf ("- missing\n");
345 } else {
346 printf ("- no sectors to erase\n");
347 }
348 return 1;
349 }
350
351 if ((info->flash_id == FLASH_UNKNOWN) ||
352 (info->flash_id > FLASH_AMD_COMP)) {
353 printf ("Can't erase unknown flash type %08lx - aborted\n",
354 info->flash_id);
355 return 1;
356 }
357
358 prot = 0;
359 for (sect=s_first; sect<=s_last; ++sect) {
360 if (info->protect[sect]) {
361 prot++;
362 }
363 }
364
365 if (prot) {
366 printf ("- Warning: %d protected sectors will not be erased!\n",
367 prot);
368 } else {
369 printf ("\n");
370 }
371
372 l_sect = -1;
373
374 /* Disable interrupts which might cause a timeout here */
375 flag = disable_interrupts();
376
377 addr[0xAAA] = 0xAAAAAAAA;
378 addr[0x555] = 0x55555555;
379 addr[0xAAA] = 0x80808080;
380 addr[0xAAA] = 0xAAAAAAAA;
381 addr[0x555] = 0x55555555;
382
383 /* Start erase on unprotected sectors */
384 for (sect = s_first; sect<=s_last; sect++) {
385 if (info->protect[sect] == 0) { /* not protected */
386 addr = (vu_long *)(info->start[sect]) ;
387 addr[0] = 0x30303030 ;
388 l_sect = sect;
389 }
390 }
391
392 /* re-enable interrupts if necessary */
393 if (flag)
394 enable_interrupts();
395
396 /* wait at least 80us - let's wait 1 ms */
397 udelay (1000);
398
399 /*
400 * We wait for the last triggered sector
401 */
402 if (l_sect < 0)
403 goto DONE;
404
405 start = get_timer (0);
406 last = start;
407 addr = (vu_long *)(info->start[l_sect]);
408 while ((addr[0] & 0x80808080) != 0x80808080) {
409 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
410 printf ("Timeout\n");
411 return 1;
412 }
413 /* show that we're waiting */
414 if ((now - last) > 1000) { /* every second */
415 putc ('.');
416 last = now;
417 }
418 }
419
420 DONE:
421 /* reset to read mode */
422 addr = (vu_long *)info->start[0];
423 addr[0] = 0xF0F0F0F0; /* reset bank */
424
425 printf (" done\n");
426 return 0;
427 }
428
429 /*-----------------------------------------------------------------------
430 * Copy memory to flash, returns:
431 * 0 - OK
432 * 1 - write timeout
433 * 2 - Flash not erased
434 */
435
436 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
437 {
438 ulong cp, wp, data;
439 int i, l, rc;
440
441 wp = (addr & ~3); /* get lower word aligned address */
442
443 /*
444 * handle unaligned start bytes
445 */
446 if ((l = addr - wp) != 0) {
447 data = 0;
448 for (i=0, cp=wp; i<l; ++i, ++cp) {
449 data = (data << 8) | (*(uchar *)cp);
450 }
451 for (; i<4 && cnt>0; ++i) {
452 data = (data << 8) | *src++;
453 --cnt;
454 ++cp;
455 }
456 for (; cnt==0 && i<4; ++i, ++cp) {
457 data = (data << 8) | (*(uchar *)cp);
458 }
459
460 if ((rc = write_word(info, wp, data)) != 0) {
461 return (rc);
462 }
463 wp += 4;
464 }
465
466 /*
467 * handle word aligned part
468 */
469 while (cnt >= 4) {
470 data = 0;
471 for (i=0; i<4; ++i) {
472 data = (data << 8) | *src++;
473 }
474 if ((rc = write_word(info, wp, data)) != 0) {
475 return (rc);
476 }
477 wp += 4;
478 cnt -= 4;
479 }
480
481 if (cnt == 0) {
482 return (0);
483 }
484
485 /*
486 * handle unaligned tail bytes
487 */
488 data = 0;
489 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
490 data = (data << 8) | *src++;
491 --cnt;
492 }
493 for (; i<4; ++i, ++cp) {
494 data = (data << 8) | (*(uchar *)cp);
495 }
496
497 return (write_word(info, wp, data));
498 }
499
500 /*-----------------------------------------------------------------------
501 * Write a word to Flash, returns:
502 * 0 - OK
503 * 1 - write timeout
504 * 2 - Flash not erased
505 */
506 static int write_word (flash_info_t *info, ulong dest, ulong data)
507 {
508 vu_long *addr = (vu_long *)(info->start[0]);
509 ulong start;
510 int flag;
511
512 /* Check if Flash is (sufficiently) erased */
513 if ((*((vu_long *)dest) & data) != data) {
514 return (2);
515 }
516 /* Disable interrupts which might cause a timeout here */
517 flag = disable_interrupts();
518
519 addr[0xAAA] = 0xAAAAAAAA;
520 addr[0x555] = 0x55555555;
521 addr[0xAAA] = 0xA0A0A0A0;
522
523 *((vu_long *)dest) = data;
524
525 /* re-enable interrupts if necessary */
526 if (flag)
527 enable_interrupts();
528
529 /* data polling for D7 */
530 start = get_timer (0);
531 while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
532 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
533 return (1);
534 }
535 }
536 return (0);
537 }
538
539 /*-----------------------------------------------------------------------
540 */