?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
fix warning: remove assigned to variable
[openocd/dsp568013.git] / src / flash / nor / pic32mx.c
blob65d93ad40e1b8188180dbae9a9207f15c8824dda
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * Copyright (C) 2008 by John McCarthy *
9 * jgmcc@magma.ca *
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (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 *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include "imp.h"
31 #include <target/algorithm.h>
32 #include <target/mips32.h>
33 #include <target/mips_m4k.h>
34
35 #define PIC32MX_MANUF_ID 0x029
36
37 /* pic32mx memory locations */
38
39 #define PIC32MX_PHYS_RAM 0x00000000
40 #define PIC32MX_PHYS_PGM_FLASH 0x1D000000
41 #define PIC32MX_PHYS_PERIPHERALS 0x1F800000
42 #define PIC32MX_PHYS_BOOT_FLASH 0x1FC00000
43
44 /*
45 * Translate Virtual and Physical addresses.
46 * Note: These macros only work for KSEG0/KSEG1 addresses.
47 */
48
49 #define Virt2Phys(v) ((v) & 0x1FFFFFFF)
50
51 /* pic32mx configuration register locations */
52
53 #define PIC32MX_DEVCFG0 0xBFC02FFC
54 #define PIC32MX_DEVCFG1 0xBFC02FF8
55 #define PIC32MX_DEVCFG2 0xBFC02FF4
56 #define PIC32MX_DEVCFG3 0xBFC02FF0
57 #define PIC32MX_DEVID 0xBF80F220
58
59 #define PIC32MX_BMXPFMSZ 0xBF882060
60 #define PIC32MX_BMXBOOTSZ 0xBF882070
61 #define PIC32MX_BMXDRMSZ 0xBF882040
62
63 /* pic32mx flash controller register locations */
64
65 #define PIC32MX_NVMCON 0xBF80F400
66 #define PIC32MX_NVMCONCLR 0xBF80F404
67 #define PIC32MX_NVMCONSET 0xBF80F408
68 #define PIC32MX_NVMCONINV 0xBF80F40C
69 #define NVMCON_NVMWR (1 << 15)
70 #define NVMCON_NVMWREN (1 << 14)
71 #define NVMCON_NVMERR (1 << 13)
72 #define NVMCON_LVDERR (1 << 12)
73 #define NVMCON_LVDSTAT (1 << 11)
74 #define NVMCON_OP_PFM_ERASE 0x5
75 #define NVMCON_OP_PAGE_ERASE 0x4
76 #define NVMCON_OP_ROW_PROG 0x3
77 #define NVMCON_OP_WORD_PROG 0x1
78 #define NVMCON_OP_NOP 0x0
79
80 #define PIC32MX_NVMKEY 0xBF80F410
81 #define PIC32MX_NVMADDR 0xBF80F420
82 #define PIC32MX_NVMADDRCLR 0xBF80F424
83 #define PIC32MX_NVMADDRSET 0xBF80F428
84 #define PIC32MX_NVMADDRINV 0xBF80F42C
85 #define PIC32MX_NVMDATA 0xBF80F430
86 #define PIC32MX_NVMSRCADDR 0xBF80F440
87
88 /* flash unlock keys */
89
90 #define NVMKEY1 0xAA996655
91 #define NVMKEY2 0x556699AA
92
93 struct pic32mx_flash_bank
94 {
95 struct working_area *write_algorithm;
96 int probed;
97 };
98
99 /*
100 * DEVID values as per PIC32MX Flash Programming Specification Rev H
101 */
102
103 static const struct pic32mx_devs_s {
104 uint32_t devid;
105 const char *name;
106 } pic32mx_devs[] = {
107 {0x04A07053, "110F016B"},
108 {0x04A09053, "110F016C"},
109 {0x04A0B053, "110F016D"},
110 {0x04A06053, "120F032B"},
111 {0x04A08053, "120F032C"},
112 {0x04A0A053, "120F032D"},
113 {0x04A01053, "210F016B"},
114 {0x04A03053, "210F016C"},
115 {0x04A05053, "210F016D"},
116 {0x04A00053, "220F032B"},
117 {0x04A02053, "220F032C"},
118 {0x04A04053, "220F032D"},
119 {0x00938053, "360F512L"},
120 {0x00934053, "360F256L"},
121 {0x0092D053, "340F128L"},
122 {0x0092A053, "320F128L"},
123 {0x00916053, "340F512H"},
124 {0x00912053, "340F256H"},
125 {0x0090D053, "340F128H"},
126 {0x0090A053, "320F128H"},
127 {0x00906053, "320F064H"},
128 {0x00902053, "320F032H"},
129 {0x00978053, "460F512L"},
130 {0x00974053, "460F256L"},
131 {0x0096D053, "440F128L"},
132 {0x00952053, "440F256H"},
133 {0x00956053, "440F512H"},
134 {0x0094D053, "440F128H"},
135 {0x00942053, "420F032H"},
136 {0x04307053, "795F512L"},
137 {0x0430E053, "795F512H"},
138 {0x04306053, "775F512L"},
139 {0x0430D053, "775F512H"},
140 {0x04312053, "775F256L"},
141 {0x04303053, "775F256H"},
142 {0x04417053, "764F128L"},
143 {0x0440B053, "764F128H"},
144 {0x04341053, "695F512L"},
145 {0x04325053, "695F512H"},
146 {0x04311053, "675F512L"},
147 {0x0430C053, "675F512H"},
148 {0x04305053, "675F256L"},
149 {0x0430B053, "675F256H"},
150 {0x04413053, "664F128L"},
151 {0x04407053, "664F128H"},
152 {0x04411053, "664F064L"},
153 {0x04405053, "664F064H"},
154 {0x0430F053, "575F512L"},
155 {0x04309053, "575F512H"},
156 {0x04333053, "575F256L"},
157 {0x04317053, "575F256H"},
158 {0x0440F053, "564F128L"},
159 {0x04403053, "564F128H"},
160 {0x0440D053, "564F064L"},
161 {0x04401053, "564F064H"},
162 {0x04400053, "534F064H"},
163 {0x0440C053, "534F064L"},
164 {0x00000000, NULL}
165 };
166
167 /* flash bank pic32mx <base> <size> 0 0 <target#>
168 */
169 FLASH_BANK_COMMAND_HANDLER(pic32mx_flash_bank_command)
170 {
171 struct pic32mx_flash_bank *pic32mx_info;
172
173 if (CMD_ARGC < 6)
174 {
175 LOG_WARNING("incomplete flash_bank pic32mx configuration");
176 return ERROR_FLASH_BANK_INVALID;
177 }
178
179 pic32mx_info = malloc(sizeof(struct pic32mx_flash_bank));
180 bank->driver_priv = pic32mx_info;
181
182 pic32mx_info->write_algorithm = NULL;
183 pic32mx_info->probed = 0;
184
185 return ERROR_OK;
186 }
187
188 static uint32_t pic32mx_get_flash_status(struct flash_bank *bank)
189 {
190 struct target *target = bank->target;
191 uint32_t status;
192
193 target_read_u32(target, PIC32MX_NVMCON, &status);
194
195 return status;
196 }
197
198 static uint32_t pic32mx_wait_status_busy(struct flash_bank *bank, int timeout)
199 {
200 uint32_t status;
201
202 /* wait for busy to clear */
203 while (((status = pic32mx_get_flash_status(bank)) & NVMCON_NVMWR) && (timeout-- > 0))
204 {
205 LOG_DEBUG("status: 0x%" PRIx32, status);
206 alive_sleep(1);
207 }
208 if (timeout <= 0)
209 LOG_DEBUG("timeout: status: 0x%" PRIx32, status);
210
211 return status;
212 }
213
214 static int pic32mx_nvm_exec(struct flash_bank *bank, uint32_t op, uint32_t timeout)
215 {
216 struct target *target = bank->target;
217 uint32_t status;
218
219 target_write_u32(target, PIC32MX_NVMCON, NVMCON_NVMWREN | op);
220
221 /* unlock flash registers */
222 target_write_u32(target, PIC32MX_NVMKEY, NVMKEY1);
223 target_write_u32(target, PIC32MX_NVMKEY, NVMKEY2);
224
225 /* start operation */
226 target_write_u32(target, PIC32MX_NVMCONSET, NVMCON_NVMWR);
227
228 status = pic32mx_wait_status_busy(bank, timeout);
229
230 /* lock flash registers */
231 target_write_u32(target, PIC32MX_NVMCONCLR, NVMCON_NVMWREN);
232
233 return status;
234 }
235
236 static int pic32mx_protect_check(struct flash_bank *bank)
237 {
238 struct target *target = bank->target;
239
240 uint32_t devcfg0;
241 int s;
242 int num_pages;
243
244 if (target->state != TARGET_HALTED)
245 {
246 LOG_ERROR("Target not halted");
247 return ERROR_TARGET_NOT_HALTED;
248 }
249
250 target_read_u32(target, PIC32MX_DEVCFG0, &devcfg0);
251
252 if ((devcfg0 & (1 << 28)) == 0) /* code protect bit */
253 num_pages = 0xffff; /* All pages protected */
254 else if (Virt2Phys(bank->base) == PIC32MX_PHYS_BOOT_FLASH)
255 {
256 if (devcfg0 & (1 << 24))
257 num_pages = 0; /* All pages unprotected */
258 else
259 num_pages = 0xffff; /* All pages protected */
260 }
261 else /* pgm flash */
262 num_pages = (~devcfg0 >> 12) & 0xff;
263
264 for (s = 0; s < bank->num_sectors && s < num_pages; s++)
265 bank->sectors[s].is_protected = 1;
266 for (; s < bank->num_sectors; s++)
267 bank->sectors[s].is_protected = 0;
268
269 return ERROR_OK;
270 }
271
272 static int pic32mx_erase(struct flash_bank *bank, int first, int last)
273 {
274 struct target *target = bank->target;
275 int i;
276 uint32_t status;
277
278 if (bank->target->state != TARGET_HALTED)
279 {
280 LOG_ERROR("Target not halted");
281 return ERROR_TARGET_NOT_HALTED;
282 }
283
284 if ((first == 0) && (last == (bank->num_sectors - 1))
285 && (Virt2Phys(bank->base) == PIC32MX_PHYS_PGM_FLASH))
286 {
287 /* this will only erase the Program Flash (PFM), not the Boot Flash (BFM)
288 * we need to use the MTAP to perform a full erase */
289 LOG_DEBUG("Erasing entire program flash");
290 status = pic32mx_nvm_exec(bank, NVMCON_OP_PFM_ERASE, 50);
291 if (status & NVMCON_NVMERR)
292 return ERROR_FLASH_OPERATION_FAILED;
293 if (status & NVMCON_LVDERR)
294 return ERROR_FLASH_OPERATION_FAILED;
295 return ERROR_OK;
296 }
297
298 for (i = first; i <= last; i++)
299 {
300 target_write_u32(target, PIC32MX_NVMADDR, Virt2Phys(bank->base + bank->sectors[i].offset));
301
302 status = pic32mx_nvm_exec(bank, NVMCON_OP_PAGE_ERASE, 10);
303
304 if (status & NVMCON_NVMERR)
305 return ERROR_FLASH_OPERATION_FAILED;
306 if (status & NVMCON_LVDERR)
307 return ERROR_FLASH_OPERATION_FAILED;
308 bank->sectors[i].is_erased = 1;
309 }
310
311 return ERROR_OK;
312 }
313
314 static int pic32mx_protect(struct flash_bank *bank, int set, int first, int last)
315 {
316 struct target *target = bank->target;
317
318 if (target->state != TARGET_HALTED)
319 {
320 LOG_ERROR("Target not halted");
321 return ERROR_TARGET_NOT_HALTED;
322 }
323
324 return ERROR_OK;
325 }
326
327 /* see contib/loaders/flash/pic32mx.s for src */
328
329 static const uint32_t pic32mx_flash_write_code[] = {
330 /* write: */
331 0x3C08AA99, /* lui $t0, 0xaa99 */
332 0x35086655, /* ori $t0, 0x6655 */
333 0x3C095566, /* lui $t1, 0x5566 */
334 0x352999AA, /* ori $t1, 0x99aa */
335 0x3C0ABF80, /* lui $t2, 0xbf80 */
336 0x354AF400, /* ori $t2, 0xf400 */
337 0x340B4003, /* ori $t3, $zero, 0x4003 */
338 0x340C8000, /* ori $t4, $zero, 0x8000 */
339 /* write_row: */
340 0x2CD30080, /* sltiu $s3, $a2, 128 */
341 0x16600008, /* bne $s3, $zero, write_word */
342 0x340D4000, /* ori $t5, $zero, 0x4000 */
343 0xAD450020, /* sw $a1, 32($t2) */
344 0xAD440040, /* sw $a0, 64($t2) */
345 0x04110016, /* bal progflash */
346 0x24840200, /* addiu $a0, $a0, 512 */
347 0x24A50200, /* addiu $a1, $a1, 512 */
348 0x1000FFF7, /* beq $zero, $zero, write_row */
349 0x24C6FF80, /* addiu $a2, $a2, -128 */
350 /* write_word: */
351 0x3C15A000, /* lui $s5, 0xa000 */
352 0x36B50000, /* ori $s5, $s5, 0x0 */
353 0x00952025, /* or $a0, $a0, $s5 */
354 0x10000008, /* beq $zero, $zero, next_word */
355 0x340B4001, /* ori $t3, $zero, 0x4001 */
356 /* prog_word: */
357 0x8C940000, /* lw $s4, 0($a0) */
358 0xAD540030, /* sw $s4, 48($t2) */
359 0xAD450020, /* sw $a1, 32($t2) */
360 0x04110009, /* bal progflash */
361 0x24840004, /* addiu $a0, $a0, 4 */
362 0x24A50004, /* addiu $a1, $a1, 4 */
363 0x24C6FFFF, /* addiu $a2, $a2, -1 */
364 /* next_word: */
365 0x14C0FFF8, /* bne $a2, $zero, prog_word */
366 0x00000000, /* nop */
367 /* done: */
368 0x10000002, /* beq $zero, $zero, exit */
369 0x24040000, /* addiu $a0, $zero, 0 */
370 /* error: */
371 0x26240000, /* addiu $a0, $s1, 0 */
372 /* exit: */
373 0x7000003F, /* sdbbp */
374 /* progflash: */
375 0xAD4B0000, /* sw $t3, 0($t2) */
376 0xAD480010, /* sw $t0, 16($t2) */
377 0xAD490010, /* sw $t1, 16($t2) */
378 0xAD4C0008, /* sw $t4, 8($t2) */
379 /* waitflash: */
380 0x8D500000, /* lw $s0, 0($t2) */
381 0x020C8024, /* and $s0, $s0, $t4 */
382 0x1600FFFD, /* bne $s0, $zero, waitflash */
383 0x00000000, /* nop */
384 0x00000000, /* nop */
385 0x00000000, /* nop */
386 0x00000000, /* nop */
387 0x00000000, /* nop */
388 0x8D510000, /* lw $s1, 0($t2) */
389 0x30113000, /* andi $s1, $zero, 0x3000 */
390 0x1620FFEF, /* bne $s1, $zero, error */
391 0xAD4D0004, /* sw $t5, 4($t2) */
392 0x03E00008, /* jr $ra */
393 0x00000000 /* nop */
394 };
395
396 static int pic32mx_write_block(struct flash_bank *bank, uint8_t *buffer,
397 uint32_t offset, uint32_t count)
398 {
399 struct target *target = bank->target;
400 uint32_t buffer_size = 16384;
401 struct working_area *source;
402 uint32_t address = bank->base + offset;
403 struct reg_param reg_params[3];
404 int retval = ERROR_OK;
405
406 struct pic32mx_flash_bank *pic32mx_info = bank->driver_priv;
407 struct mips32_algorithm mips32_info;
408
409 /* flash write code */
410 if (target_alloc_working_area(target, sizeof(pic32mx_flash_write_code),
411 &pic32mx_info->write_algorithm) != ERROR_OK)
412 {
413 LOG_WARNING("no working area available, can't do block memory writes");
414 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
415 };
416
417 if ((retval = target_write_buffer(target,
418 pic32mx_info->write_algorithm->address,
419 sizeof(pic32mx_flash_write_code),
420 (uint8_t*)pic32mx_flash_write_code)) != ERROR_OK)
421 return retval;
422
423 /* memory buffer */
424 while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK)
425 {
426 buffer_size /= 2;
427 if (buffer_size <= 256)
428 {
429 /* if we already allocated the writing code, but failed to get a
430 * buffer, free the algorithm */
431 if (pic32mx_info->write_algorithm)
432 target_free_working_area(target, pic32mx_info->write_algorithm);
433
434 LOG_WARNING("no large enough working area available, can't do block memory writes");
435 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
436 }
437 };
438
439 mips32_info.common_magic = MIPS32_COMMON_MAGIC;
440 mips32_info.isa_mode = MIPS32_ISA_MIPS32;
441
442 init_reg_param(&reg_params[0], "a0", 32, PARAM_IN_OUT);
443 init_reg_param(&reg_params[1], "a1", 32, PARAM_OUT);
444 init_reg_param(&reg_params[2], "a2", 32, PARAM_OUT);
445
446 while (count > 0)
447 {
448 uint32_t status;
449 uint32_t thisrun_count = (count > (buffer_size / 4)) ?
450 (buffer_size / 4) : count;
451
452 if ((retval = target_write_buffer(target, source->address,
453 thisrun_count * 4, buffer)) != ERROR_OK)
454 break;
455
456 buf_set_u32(reg_params[0].value, 0, 32, Virt2Phys(source->address));
457 buf_set_u32(reg_params[1].value, 0, 32, Virt2Phys(address));
458 buf_set_u32(reg_params[2].value, 0, 32, thisrun_count);
459
460 if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
461 pic32mx_info->write_algorithm->address,
462 0,
463 10000, &mips32_info)) != ERROR_OK)
464 {
465 LOG_ERROR("error executing pic32mx flash write algorithm");
466 retval = ERROR_FLASH_OPERATION_FAILED;
467 break;
468 }
469
470 status = buf_get_u32(reg_params[0].value, 0, 32);
471
472 if (status & NVMCON_NVMERR)
473 {
474 LOG_ERROR("Flash write error NVMERR (status = 0x%08" PRIx32 ")", status);
475 retval = ERROR_FLASH_OPERATION_FAILED;
476 break;
477 }
478
479 if (status & NVMCON_LVDERR)
480 {
481 LOG_ERROR("Flash write error LVDERR (status = 0x%08" PRIx32 ")", status);
482 retval = ERROR_FLASH_OPERATION_FAILED;
483 break;
484 }
485
486 buffer += thisrun_count * 4;
487 address += thisrun_count * 4;
488 count -= thisrun_count;
489 }
490
491 target_free_working_area(target, source);
492 target_free_working_area(target, pic32mx_info->write_algorithm);
493
494 destroy_reg_param(&reg_params[0]);
495 destroy_reg_param(&reg_params[1]);
496 destroy_reg_param(&reg_params[2]);
497
498 return retval;
499 }
500
501 static int pic32mx_write_word(struct flash_bank *bank, uint32_t address, uint32_t word)
502 {
503 struct target *target = bank->target;
504
505 target_write_u32(target, PIC32MX_NVMADDR, Virt2Phys(address));
506 target_write_u32(target, PIC32MX_NVMDATA, word);
507
508 return pic32mx_nvm_exec(bank, NVMCON_OP_WORD_PROG, 5);
509 }
510
511 static int pic32mx_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
512 {
513 uint32_t words_remaining = (count / 4);
514 uint32_t bytes_remaining = (count & 0x00000003);
515 uint32_t address = bank->base + offset;
516 uint32_t bytes_written = 0;
517 uint32_t status;
518 int retval;
519
520 if (bank->target->state != TARGET_HALTED)
521 {
522 LOG_ERROR("Target not halted");
523 return ERROR_TARGET_NOT_HALTED;
524 }
525
526 LOG_DEBUG("writing to flash at address 0x%08" PRIx32 " at offset 0x%8.8" PRIx32
527 " count: 0x%8.8" PRIx32 "", bank->base, offset, count);
528
529 if (offset & 0x3)
530 {
531 LOG_WARNING("offset 0x%" PRIx32 "breaks required 4-byte alignment", offset);
532 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
533 }
534
535 /* multiple words (4-byte) to be programmed? */
536 if (words_remaining > 0)
537 {
538 /* try using a block write */
539 if ((retval = pic32mx_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK)
540 {
541 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
542 {
543 /* if block write failed (no sufficient working area),
544 * we use normal (slow) single dword accesses */
545 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
546 }
547 else if (retval == ERROR_FLASH_OPERATION_FAILED)
548 {
549 LOG_ERROR("flash writing failed");
550 return retval;
551 }
552 }
553 else
554 {
555 buffer += words_remaining * 4;
556 address += words_remaining * 4;
557 words_remaining = 0;
558 }
559 }
560
561 while (words_remaining > 0)
562 {
563 uint32_t value;
564 memcpy(&value, buffer + bytes_written, sizeof(uint32_t));
565
566 status = pic32mx_write_word(bank, address, value);
567
568 if (status & NVMCON_NVMERR)
569 {
570 LOG_ERROR("Flash write error NVMERR (status = 0x%08" PRIx32 ")", status);
571 return ERROR_FLASH_OPERATION_FAILED;
572 }
573
574 if (status & NVMCON_LVDERR)
575 {
576 LOG_ERROR("Flash write error LVDERR (status = 0x%08" PRIx32 ")", status);
577 return ERROR_FLASH_OPERATION_FAILED;
578 }
579
580 bytes_written += 4;
581 words_remaining--;
582 address += 4;
583 }
584
585 if (bytes_remaining)
586 {
587 uint32_t value = 0xffffffff;
588 memcpy(&value, buffer + bytes_written, bytes_remaining);
589
590 status = pic32mx_write_word(bank, address, value);
591
592 if (status & NVMCON_NVMERR)
593 {
594 LOG_ERROR("Flash write error NVMERR (status = 0x%08" PRIx32 ")", status);
595 return ERROR_FLASH_OPERATION_FAILED;
596 }
597
598 if (status & NVMCON_LVDERR)
599 {
600 LOG_ERROR("Flash write error LVDERR (status = 0x%08" PRIx32 ")", status);
601 return ERROR_FLASH_OPERATION_FAILED;
602 }
603 }
604
605 return ERROR_OK;
606 }
607
608 static int pic32mx_probe(struct flash_bank *bank)
609 {
610 struct target *target = bank->target;
611 struct pic32mx_flash_bank *pic32mx_info = bank->driver_priv;
612 struct mips32_common *mips32 = target->arch_info;
613 struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
614 int i;
615 uint32_t num_pages = 0;
616 uint32_t device_id;
617 int page_size;
618
619 pic32mx_info->probed = 0;
620
621 device_id = ejtag_info->idcode;
622 LOG_INFO("device id = 0x%08" PRIx32 " (manuf 0x%03x dev 0x%04x, ver 0x%02x)",
623 device_id,
624 (unsigned)((device_id >> 1) & 0x7ff),
625 (unsigned)((device_id >> 12) & 0xffff),
626 (unsigned)((device_id >> 28) & 0xf));
627
628 if (((device_id >> 1) & 0x7ff) != PIC32MX_MANUF_ID) {
629 LOG_WARNING("Cannot identify target as a PIC32MX family.");
630 return ERROR_FLASH_OPERATION_FAILED;
631 }
632
633 page_size = 4096;
634
635 if (Virt2Phys(bank->base) == PIC32MX_PHYS_BOOT_FLASH)
636 {
637 /* 0x1FC00000: Boot flash size */
638 #if 0
639 /* for some reason this register returns 8k for the boot bank size
640 * this does not match the docs, so for now set the boot bank at a
641 * fixed 12k */
642 if (target_read_u32(target, PIC32MX_BMXBOOTSZ, &num_pages) != ERROR_OK) {
643 LOG_WARNING("PIC32MX flash size failed, probe inaccurate - assuming 12k flash");
644 num_pages = (12 * 1024);
645 }
646 #else
647 /* fixed 12k boot bank - see comments above */
648 num_pages = (12 * 1024);
649 #endif
650 }
651 else
652 {
653 /* read the flash size from the device */
654 if (target_read_u32(target, PIC32MX_BMXPFMSZ, &num_pages) != ERROR_OK) {
655 LOG_WARNING("PIC32MX flash size failed, probe inaccurate - assuming 512k flash");
656 num_pages = (512 * 1024);
657 }
658 }
659
660 LOG_INFO("flash size = %" PRId32 "kbytes", num_pages / 1024);
661
662 if (bank->sectors)
663 {
664 free(bank->sectors);
665 bank->sectors = NULL;
666 }
667
668 /* calculate numbers of pages */
669 num_pages /= page_size;
670 bank->size = (num_pages * page_size);
671 bank->num_sectors = num_pages;
672 bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
673
674 for (i = 0; i < (int)num_pages; i++)
675 {
676 bank->sectors[i].offset = i * page_size;
677 bank->sectors[i].size = page_size;
678 bank->sectors[i].is_erased = -1;
679 bank->sectors[i].is_protected = 1;
680 }
681
682 pic32mx_info->probed = 1;
683
684 return ERROR_OK;
685 }
686
687 static int pic32mx_auto_probe(struct flash_bank *bank)
688 {
689 struct pic32mx_flash_bank *pic32mx_info = bank->driver_priv;
690 if (pic32mx_info->probed)
691 return ERROR_OK;
692 return pic32mx_probe(bank);
693 }
694
695 static int pic32mx_info(struct flash_bank *bank, char *buf, int buf_size)
696 {
697 struct target *target = bank->target;
698 struct mips32_common *mips32 = target->arch_info;
699 struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
700 uint32_t device_id;
701 int printed = 0, i;
702
703 device_id = ejtag_info->idcode;
704
705 if (((device_id >> 1) & 0x7ff) != PIC32MX_MANUF_ID) {
706 snprintf(buf, buf_size,
707 "Cannot identify target as a PIC32MX family (manufacturer 0x%03d != 0x%03d)\n",
708 (unsigned)((device_id >> 1) & 0x7ff),
709 PIC32MX_MANUF_ID);
710 return ERROR_FLASH_OPERATION_FAILED;
711 }
712
713 for (i = 0; pic32mx_devs[i].name != NULL; i++)
714 {
715 if (pic32mx_devs[i].devid == (device_id & 0x0fffffff)) {
716 printed = snprintf(buf, buf_size, "PIC32MX%s", pic32mx_devs[i].name);
717 break;
718 }
719 }
720
721 if (pic32mx_devs[i].name == NULL) {
722 printed = snprintf(buf, buf_size, "Unknown");
723 }
724
725 buf += printed;
726 buf_size -= printed;
727 snprintf(buf, buf_size, " Ver: 0x%02x",
728 (unsigned)((device_id >> 28) & 0xf));
729
730 return ERROR_OK;
731 }
732
733 COMMAND_HANDLER(pic32mx_handle_pgm_word_command)
734 {
735 uint32_t address, value;
736 int status, res;
737
738 if (CMD_ARGC != 3)
739 {
740 command_print(CMD_CTX, "pic32mx pgm_word <addr> <value> <bank>");
741 return ERROR_OK;
742 }
743
744 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
745 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
746
747 struct flash_bank *bank;
748 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 2, &bank);
749 if (ERROR_OK != retval)
750 return retval;
751
752 if (address < bank->base || address >= (bank->base + bank->size))
753 {
754 command_print(CMD_CTX, "flash address '%s' is out of bounds", CMD_ARGV[0]);
755 return ERROR_OK;
756 }
757
758 res = ERROR_OK;
759 status = pic32mx_write_word(bank, address, value);
760 if (status & NVMCON_NVMERR)
761 res = ERROR_FLASH_OPERATION_FAILED;
762 if (status & NVMCON_LVDERR)
763 res = ERROR_FLASH_OPERATION_FAILED;
764
765 if (res == ERROR_OK)
766 command_print(CMD_CTX, "pic32mx pgm word complete");
767 else
768 command_print(CMD_CTX, "pic32mx pgm word failed (status = 0x%x)", status);
769
770 return ERROR_OK;
771 }
772
773 COMMAND_HANDLER(pic32mx_handle_unlock_command)
774 {
775 uint32_t mchip_cmd;
776 struct target *target = NULL;
777 struct mips_m4k_common *mips_m4k;
778 struct mips_ejtag *ejtag_info;
779 int timeout = 10;
780
781 if (CMD_ARGC < 1)
782 {
783 command_print(CMD_CTX, "pic32mx unlock <bank>");
784 return ERROR_OK;
785 }
786
787 struct flash_bank *bank;
788 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
789 if (ERROR_OK != retval)
790 return retval;
791
792 target = bank->target;
793 mips_m4k = target_to_m4k(target);
794 ejtag_info = &mips_m4k->mips32.ejtag_info;
795
796 /* we have to use the MTAP to perform a full erase */
797 mips_ejtag_set_instr(ejtag_info, MTAP_SW_MTAP);
798 mips_ejtag_set_instr(ejtag_info, MTAP_COMMAND);
799
800 /* first check status of device */
801 mchip_cmd = MCHP_STATUS;
802 mips_ejtag_drscan_8(ejtag_info, &mchip_cmd);
803 if (mchip_cmd & (1 << 7))
804 {
805 /* device is not locked */
806 command_print(CMD_CTX, "pic32mx is already unlocked, erasing anyway");
807 }
808
809 /* unlock/erase device */
810 mips_ejtag_drscan_8_out(ejtag_info, MCHP_ASERT_RST);
811
812 mips_ejtag_drscan_8_out(ejtag_info, MCHP_ERASE);
813
814 do {
815 mchip_cmd = MCHP_STATUS;
816 mips_ejtag_drscan_8(ejtag_info, &mchip_cmd);
817 if (timeout-- == 0)
818 {
819 LOG_DEBUG("timeout waiting for unlock: 0x%" PRIx32 "", mchip_cmd);
820 break;
821 }
822 alive_sleep(1);
823 } while ((mchip_cmd & (1 << 2)) || (!(mchip_cmd & (1 << 3))));
824
825 mips_ejtag_drscan_8_out(ejtag_info, MCHP_DE_ASSERT_RST);
826
827 /* select ejtag tap */
828 mips_ejtag_set_instr(ejtag_info, MTAP_SW_ETAP);
829
830 command_print(CMD_CTX, "pic32mx unlocked.\n"
831 "INFO: a reset or power cycle is required "
832 "for the new settings to take effect.");
833
834 return ERROR_OK;
835 }
836
837 static const struct command_registration pic32mx_exec_command_handlers[] = {
838 {
839 .name = "pgm_word",
840 .handler = pic32mx_handle_pgm_word_command,
841 .mode = COMMAND_EXEC,
842 .help = "program a word",
843 },
844 {
845 .name = "unlock",
846 .handler = pic32mx_handle_unlock_command,
847 .mode = COMMAND_EXEC,
848 .usage = "[bank_id]",
849 .help = "Unlock/Erase entire device.",
850 },
851 COMMAND_REGISTRATION_DONE
852 };
853
854 static const struct command_registration pic32mx_command_handlers[] = {
855 {
856 .name = "pic32mx",
857 .mode = COMMAND_ANY,
858 .help = "pic32mx flash command group",
859 .chain = pic32mx_exec_command_handlers,
860 },
861 COMMAND_REGISTRATION_DONE
862 };
863
864 struct flash_driver pic32mx_flash = {
865 .name = "pic32mx",
866 .commands = pic32mx_command_handlers,
867 .flash_bank_command = pic32mx_flash_bank_command,
868 .erase = pic32mx_erase,
869 .protect = pic32mx_protect,
870 .write = pic32mx_write,
871 .read = default_flash_read,
872 .probe = pic32mx_probe,
873 .auto_probe = pic32mx_auto_probe,
874 .erase_check = default_flash_mem_blank_check,
875 .protect_check = pic32mx_protect_check,
876 .info = pic32mx_info,
877 };