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[openocd.git] / src / flash / at91sam7.c
1 /***************************************************************************
2 * Copyright (C) 2006 by Magnus Lundin *
3 * lundin@mlu.mine.nu *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
20
21 /***************************************************************************
22 There are some things to notice
23
24 * AT91SAM7S64 is tested
25 * All AT91SAM7Sxx and AT91SAM7Xxx should work but is not tested
26 * All parameters are identified from onchip configuartion registers
27 *
28 * The flash controller handles erases automatically on a page (128/265 byte) basis
29 * Only an EraseAll command is supported by the controller
30 * Partial erases can be implemented in software by writing one 0xFFFFFFFF word to
31 * some location in every page in the region to be erased
32 *
33 * Lock regions (sectors) are 32 or 64 pages
34 *
35 ***************************************************************************/
36 #ifdef HAVE_CONFIG_H
37 #include "config.h"
38 #endif
39
40 #include "replacements.h"
41
42 #include "at91sam7.h"
43
44 #include "flash.h"
45 #include "target.h"
46 #include "log.h"
47 #include "binarybuffer.h"
48 #include "types.h"
49
50 #include <stdlib.h>
51 #include <string.h>
52 #include <unistd.h>
53
54 int at91sam7_register_commands(struct command_context_s *cmd_ctx);
55 int at91sam7_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
56 int at91sam7_erase(struct flash_bank_s *bank, int first, int last);
57 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last);
58 int at91sam7_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
59 int at91sam7_probe(struct flash_bank_s *bank);
60 int at91sam7_erase_check(struct flash_bank_s *bank);
61 int at91sam7_protect_check(struct flash_bank_s *bank);
62 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size);
63
64 u32 at91sam7_get_flash_status(flash_bank_t *bank);
65 void at91sam7_set_flash_mode(flash_bank_t *bank,int mode);
66 u8 at91sam7_wait_status_busy(flash_bank_t *bank, int timeout);
67 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
68
69 flash_driver_t at91sam7_flash =
70 {
71 .name = "at91sam7",
72 .register_commands = at91sam7_register_commands,
73 .flash_bank_command = at91sam7_flash_bank_command,
74 .erase = at91sam7_erase,
75 .protect = at91sam7_protect,
76 .write = at91sam7_write,
77 .probe = at91sam7_probe,
78 .erase_check = at91sam7_erase_check,
79 .protect_check = at91sam7_protect_check,
80 .info = at91sam7_info
81 };
82
83
84 char * EPROC[8]= {"Unknown","ARM946-E","ARM7TDMI","Unknown","ARM920T","ARM926EJ-S","Unknown","Unknown"};
85 long NVPSIZ[16] = {
86 0,
87 0x2000, /* 8K */
88 0x4000, /* 16K */
89 0x8000, /* 32K */
90 -1,
91 0x10000, /* 64K */
92 -1,
93 0x20000, /* 128K */
94 -1,
95 0x40000, /* 256K */
96 0x80000, /* 512K */
97 -1,
98 0x100000, /* 1024K */
99 -1,
100 0x200000, /* 2048K */
101 -1
102 };
103
104 long SRAMSIZ[16] = {
105 -1,
106 0x0400, /* 1K */
107 0x0800, /* 2K */
108 -1,
109 0x1c000, /* 112K */
110 0x1000, /* 4K */
111 0x14000, /* 80K */
112 0x28000, /* 160K */
113 0x2000, /* 8K */
114 0x4000, /* 16K */
115 0x8000, /* 32K */
116 0x10000, /* 64K */
117 0x20000, /* 128K */
118 0x40000, /* 256K */
119 0x18000, /* 96K */
120 0x80000, /* 512K */
121 };
122
123 int at91sam7_register_commands(struct command_context_s *cmd_ctx)
124 {
125 command_t *at91sam7_cmd = register_command(cmd_ctx, NULL, "at91sam7", NULL, COMMAND_ANY, NULL);
126 register_command(cmd_ctx, at91sam7_cmd, "gpnvm", at91sam7_handle_gpnvm_command, COMMAND_EXEC,
127 "at91sam7 gpnvm <num> <bit> set|clear, set or clear at91sam7 gpnvm bit");
128
129 return ERROR_OK;
130 }
131
132 u32 at91sam7_get_flash_status(flash_bank_t *bank)
133 {
134 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
135 target_t *target = at91sam7_info->target;
136 u32 fsr;
137
138 target_read_u32(target, MC_FSR, &fsr);
139
140 return fsr;
141 }
142
143 /** Read clock configuration and set at91sam7_info->usec_clocks*/
144 void at91sam7_read_clock_info(flash_bank_t *bank)
145 {
146 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
147 target_t *target = at91sam7_info->target;
148 u32 mckr, mcfr, pllr;
149 unsigned long tmp, mainfreq;
150
151 /* Read main clock freqency register */
152 target_read_u32(target, CKGR_MCFR, &mcfr);
153 /* Read master clock register */
154 target_read_u32(target, PMC_MCKR, &mckr);
155 /* Read Clock Generator PLL Register */
156 target_read_u32(target, CKGR_PLLR, &pllr);
157
158 at91sam7_info->mck_valid = 0;
159 switch (mckr & PMC_MCKR_CSS) {
160 case 0: /* Slow Clock */
161 at91sam7_info->mck_valid = 1;
162 tmp = RC_FREQ;
163 break;
164 case 1: /* Main Clock */
165 if (mcfr & CKGR_MCFR_MAINRDY)
166 {
167 at91sam7_info->mck_valid = 1;
168 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
169 tmp = mainfreq;
170 }
171 break;
172
173 case 2: /* Reserved */
174 break;
175 case 3: /* PLL Clock */
176 if (mcfr & CKGR_MCFR_MAINRDY)
177 {
178 target_read_u32(target, CKGR_PLLR, &pllr);
179 if (!(pllr & CKGR_PLLR_DIV))
180 break; /* 0 Hz */
181 at91sam7_info->mck_valid = 1;
182 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
183 /* Integer arithmetic should have sufficient precision
184 as long as PLL is properly configured. */
185 tmp = mainfreq / (pllr & CKGR_PLLR_DIV) *
186 (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
187 }
188 break;
189 }
190
191 /* Prescaler adjust */
192 if (((mckr & PMC_MCKR_PRES) >> 2) == 7)
193 at91sam7_info->mck_valid = 0;
194 else
195 at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
196
197 /* Forget old flash timing */
198 at91sam7_set_flash_mode(bank,0);
199 }
200
201 /* Setup the timimg registers for nvbits or normal flash */
202 void at91sam7_set_flash_mode(flash_bank_t *bank,int mode)
203 {
204 u32 fmr, fmcn = 0, fws = 0;
205 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
206 target_t *target = at91sam7_info->target;
207
208 if (mode && (mode != at91sam7_info->flashmode))
209 {
210 /* Always round up (ceil) */
211 if (mode==1)
212 /* main clocks in 1uS */
213 fmcn = (at91sam7_info->mck_freq/1000000ul)+1;
214 else if (mode==2)
215 /* main clocks in 1.5uS */
216 fmcn = (at91sam7_info->mck_freq/666666ul)+1;
217
218 /* Only allow fmcn=0 if clock period is > 30 us = 33kHz. */
219 if (at91sam7_info->mck_freq <= 33333ul)
220 fmcn = 0;
221 /* Only allow fws=0 if clock frequency is < 30 MHz. */
222 if (at91sam7_info->mck_freq > 30000000ul)
223 fws = 1;
224
225 DEBUG("fmcn: %i", fmcn);
226 fmr = fmcn << 16 | fws << 8;
227 target_write_u32(target, MC_FMR, fmr);
228 }
229
230 at91sam7_info->flashmode = mode;
231 }
232
233 u8 at91sam7_wait_status_busy(flash_bank_t *bank, int timeout)
234 {
235 u32 status;
236
237 while ((!((status = at91sam7_get_flash_status(bank)) & 0x01)) && (timeout-- > 0))
238 {
239 DEBUG("status: 0x%x", status);
240 usleep(1000);
241 }
242
243 DEBUG("status: 0x%x", status);
244
245 if (status & 0x0C)
246 {
247 ERROR("status register: 0x%x", status);
248 if (status & 0x4)
249 ERROR("Lock Error Bit Detected, Operation Abort");
250 if (status & 0x8)
251 ERROR("Invalid command and/or bad keyword, Operation Abort");
252 if (status & 0x10)
253 ERROR("Security Bit Set, Operation Abort");
254 }
255
256 return status;
257 }
258
259 /* Send one command to the AT91SAM flash controller */
260 int at91sam7_flash_command(struct flash_bank_s *bank,u8 cmd,u16 pagen)
261 {
262 u32 fcr;
263 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
264 target_t *target = at91sam7_info->target;
265
266 fcr = (0x5A<<24) | (pagen<<8) | cmd;
267 target_write_u32(target, MC_FCR, fcr);
268 DEBUG("Flash command: 0x%x, pagenumber:", fcr, pagen);
269
270 if (at91sam7_wait_status_busy(bank, 10)&0x0C)
271 {
272 return ERROR_FLASH_OPERATION_FAILED;
273 }
274 return ERROR_OK;
275 }
276
277 /* Read device id register, main clock frequency register and fill in driver info structure */
278 int at91sam7_read_part_info(struct flash_bank_s *bank)
279 {
280 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
281 target_t *target = at91sam7_info->target;
282 u32 cidr, status;
283
284 if (at91sam7_info->target->state != TARGET_HALTED)
285 {
286 return ERROR_TARGET_NOT_HALTED;
287 }
288
289 /* Read and parse chip identification register */
290 target_read_u32(target, DBGU_CIDR, &cidr);
291
292 if (cidr == 0)
293 {
294 WARNING("Cannot identify target as an AT91SAM");
295 return ERROR_FLASH_OPERATION_FAILED;
296 }
297
298 at91sam7_info->cidr = cidr;
299 at91sam7_info->cidr_ext = (cidr>>31)&0x0001;
300 at91sam7_info->cidr_nvptyp = (cidr>>28)&0x0007;
301 at91sam7_info->cidr_arch = (cidr>>20)&0x00FF;
302 at91sam7_info->cidr_sramsiz = (cidr>>16)&0x000F;
303 at91sam7_info->cidr_nvpsiz2 = (cidr>>12)&0x000F;
304 at91sam7_info->cidr_nvpsiz = (cidr>>8)&0x000F;
305 at91sam7_info->cidr_eproc = (cidr>>5)&0x0007;
306 at91sam7_info->cidr_version = cidr&0x001F;
307 bank->size = NVPSIZ[at91sam7_info->cidr_nvpsiz];
308 at91sam7_info->target_name = "Unknown";
309
310 DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x, alt_id: 0x%4.4x, alt_addr: 0x%4.4x", at91sam7_info->cidr_nvptyp, at91sam7_info->cidr_arch );
311
312 /* Read main and master clock freqency register */
313 at91sam7_read_clock_info(bank);
314
315 status = at91sam7_get_flash_status(bank);
316 at91sam7_info->lockbits = status>>16;
317 at91sam7_info->securitybit = (status>>4)&0x01;
318
319 if (at91sam7_info->cidr_arch == 0x70 )
320 {
321 at91sam7_info->num_nvmbits = 2;
322 at91sam7_info->nvmbits = (status>>8)&0x03;
323 bank->base = 0x100000;
324 bank->bus_width = 4;
325 if (bank->size==0x40000) /* AT91SAM7S256 */
326 {
327 at91sam7_info->target_name = "AT91SAM7S256";
328 at91sam7_info->num_lockbits = 16;
329 at91sam7_info->pagesize = 256;
330 at91sam7_info->pages_in_lockregion = 64;
331 at91sam7_info->num_pages = 16*64;
332 }
333 if (bank->size==0x20000) /* AT91SAM7S128 */
334 {
335 at91sam7_info->target_name = "AT91SAM7S128";
336 at91sam7_info->num_lockbits = 8;
337 at91sam7_info->pagesize = 256;
338 at91sam7_info->pages_in_lockregion = 64;
339 at91sam7_info->num_pages = 8*64;
340 }
341 if (bank->size==0x10000) /* AT91SAM7S64 */
342 {
343 at91sam7_info->target_name = "AT91SAM7S64";
344 at91sam7_info->num_lockbits = 16;
345 at91sam7_info->pagesize = 128;
346 at91sam7_info->pages_in_lockregion = 32;
347 at91sam7_info->num_pages = 16*32;
348 }
349 if (bank->size==0x08000) /* AT91SAM7S321/32 */
350 {
351 at91sam7_info->target_name = "AT91SAM7S321/32";
352 at91sam7_info->num_lockbits = 8;
353 at91sam7_info->pagesize = 128;
354 at91sam7_info->pages_in_lockregion = 32;
355 at91sam7_info->num_pages = 8*32;
356 }
357
358 return ERROR_OK;
359 }
360
361 if (at91sam7_info->cidr_arch == 0x71 )
362 {
363 at91sam7_info->num_nvmbits = 2;
364 at91sam7_info->nvmbits = (status>>8)&0x03;
365 bank->base = 0x100000;
366 bank->bus_width = 4;
367 if (bank->size==0x40000) /* AT91SAM7XC256 */
368 {
369 at91sam7_info->target_name = "AT91SAM7XC256";
370 at91sam7_info->num_lockbits = 16;
371 at91sam7_info->pagesize = 256;
372 at91sam7_info->pages_in_lockregion = 64;
373 at91sam7_info->num_pages = 16*64;
374 }
375 if (bank->size==0x20000) /* AT91SAM7XC128 */
376 {
377 at91sam7_info->target_name = "AT91SAM7XC128";
378 at91sam7_info->num_lockbits = 8;
379 at91sam7_info->pagesize = 256;
380 at91sam7_info->pages_in_lockregion = 64;
381 at91sam7_info->num_pages = 8*64;
382 }
383
384 return ERROR_OK;
385 }
386
387 if (at91sam7_info->cidr_arch == 0x75 )
388 {
389 at91sam7_info->num_nvmbits = 3;
390 at91sam7_info->nvmbits = (status>>8)&0x07;
391 bank->base = 0x100000;
392 bank->bus_width = 4;
393 if (bank->size==0x40000) /* AT91SAM7X256 */
394 {
395 at91sam7_info->target_name = "AT91SAM7X256";
396 at91sam7_info->num_lockbits = 16;
397 at91sam7_info->pagesize = 256;
398 at91sam7_info->pages_in_lockregion = 64;
399 at91sam7_info->num_pages = 16*64;
400 }
401 if (bank->size==0x20000) /* AT91SAM7X128 */
402 {
403 at91sam7_info->target_name = "AT91SAM7X128";
404 at91sam7_info->num_lockbits = 8;
405 at91sam7_info->pagesize = 256;
406 at91sam7_info->pages_in_lockregion = 64;
407 at91sam7_info->num_pages = 8*64;
408 }
409
410 return ERROR_OK;
411 }
412
413 if (at91sam7_info->cidr_arch == 0x60 )
414 {
415 at91sam7_info->num_nvmbits = 3;
416 at91sam7_info->nvmbits = (status>>8)&0x07;
417 bank->base = 0x100000;
418 bank->bus_width = 4;
419
420 if (bank->size == 0x40000) /* AT91SAM7A3 */
421 {
422 at91sam7_info->target_name = "AT91SAM7A3";
423 at91sam7_info->num_lockbits = 16;
424 at91sam7_info->pagesize = 256;
425 at91sam7_info->pages_in_lockregion = 64;
426 at91sam7_info->num_pages = 16*64;
427 }
428 return ERROR_OK;
429 }
430
431 WARNING("at91sam7 flash only tested for AT91SAM7Sxx series");
432
433 return ERROR_OK;
434 }
435
436 int at91sam7_erase_check(struct flash_bank_s *bank)
437 {
438 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
439 target_t *target = at91sam7_info->target;
440 int i;
441
442 if (!at91sam7_info->working_area_size)
443 {
444 }
445 else
446 {
447 }
448
449 return ERROR_OK;
450 }
451
452 int at91sam7_protect_check(struct flash_bank_s *bank)
453 {
454 u32 status;
455
456 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
457 target_t *target = at91sam7_info->target;
458
459 if (at91sam7_info->cidr == 0)
460 {
461 at91sam7_read_part_info(bank);
462 }
463
464 if (at91sam7_info->cidr == 0)
465 {
466 WARNING("Cannot identify target as an AT91SAM");
467 return ERROR_FLASH_OPERATION_FAILED;
468 }
469
470 status = at91sam7_get_flash_status(bank);
471 at91sam7_info->lockbits = status >> 16;
472
473 return ERROR_OK;
474 }
475
476 int at91sam7_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
477 {
478 at91sam7_flash_bank_t *at91sam7_info;
479
480 if (argc < 6)
481 {
482 WARNING("incomplete flash_bank at91sam7 configuration");
483 return ERROR_FLASH_BANK_INVALID;
484 }
485
486 at91sam7_info = malloc(sizeof(at91sam7_flash_bank_t));
487 bank->driver_priv = at91sam7_info;
488
489 at91sam7_info->target = get_target_by_num(strtoul(args[5], NULL, 0));
490 if (!at91sam7_info->target)
491 {
492 ERROR("no target '%i' configured", args[5]);
493 exit(-1);
494 }
495
496 /* part wasn't probed for info yet */
497 at91sam7_info->cidr = 0;
498
499 return ERROR_OK;
500 }
501
502 int at91sam7_erase(struct flash_bank_s *bank, int first, int last)
503 {
504 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
505
506 if (at91sam7_info->target->state != TARGET_HALTED)
507 {
508 return ERROR_TARGET_NOT_HALTED;
509 }
510
511 if (at91sam7_info->cidr == 0)
512 {
513 at91sam7_read_part_info(bank);
514 }
515
516 if (at91sam7_info->cidr == 0)
517 {
518 WARNING("Cannot identify target as an AT91SAM");
519 return ERROR_FLASH_OPERATION_FAILED;
520 }
521
522 if ((first < 0) || (last < first) || (last >= at91sam7_info->num_lockbits))
523 {
524 return ERROR_FLASH_SECTOR_INVALID;
525 }
526
527 /* Configure the flash controller timing */
528 at91sam7_read_clock_info(bank);
529 at91sam7_set_flash_mode(bank,2);
530
531 if ((first == 0) && (last == (at91sam7_info->num_lockbits-1)))
532 {
533 return at91sam7_flash_command(bank, EA, 0);
534 }
535
536 WARNING("Can only erase the whole flash area, pages are autoerased on write");
537 return ERROR_FLASH_OPERATION_FAILED;
538 }
539
540 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last)
541 {
542 u32 cmd, pagen, status;
543 int lockregion;
544
545 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
546 target_t *target = at91sam7_info->target;
547
548 if (at91sam7_info->target->state != TARGET_HALTED)
549 {
550 return ERROR_TARGET_NOT_HALTED;
551 }
552
553 if ((first < 0) || (last < first) || (last >= at91sam7_info->num_lockbits))
554 {
555 return ERROR_FLASH_SECTOR_INVALID;
556 }
557
558 if (at91sam7_info->cidr == 0)
559 {
560 at91sam7_read_part_info(bank);
561 }
562
563 if (at91sam7_info->cidr == 0)
564 {
565 WARNING("Cannot identify target as an AT91SAM");
566 return ERROR_FLASH_OPERATION_FAILED;
567 }
568
569 /* Configure the flash controller timing */
570 at91sam7_read_clock_info(bank);
571 at91sam7_set_flash_mode(bank,1);
572
573 for (lockregion=first;lockregion<=last;lockregion++)
574 {
575 pagen = lockregion*at91sam7_info->pages_in_lockregion;
576 if (set)
577 cmd = SLB;
578 else
579 cmd = CLB;
580 if (at91sam7_flash_command(bank, cmd, pagen) != ERROR_OK)
581 {
582 return ERROR_FLASH_OPERATION_FAILED;
583 }
584 }
585
586 status = at91sam7_get_flash_status(bank);
587 at91sam7_info->lockbits = status>>16;
588
589 return ERROR_OK;
590 }
591
592
593 int at91sam7_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
594 {
595 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
596 target_t *target = at91sam7_info->target;
597 u32 dst_min_alignment, wcount, bytes_remaining = count;
598 u32 first_page, last_page, pagen, buffer_pos;
599 u32 fcr;
600
601 if (at91sam7_info->target->state != TARGET_HALTED)
602 {
603 return ERROR_TARGET_NOT_HALTED;
604 }
605
606 if (at91sam7_info->cidr == 0)
607 {
608 at91sam7_read_part_info(bank);
609 }
610
611 if (at91sam7_info->cidr == 0)
612 {
613 WARNING("Cannot identify target as an AT91SAM");
614 return ERROR_FLASH_OPERATION_FAILED;
615 }
616
617 if (offset + count > bank->size)
618 return ERROR_FLASH_DST_OUT_OF_BANK;
619
620 dst_min_alignment = at91sam7_info->pagesize;
621
622 if (offset % dst_min_alignment)
623 {
624 WARNING("offset 0x%x breaks required alignment 0x%x", offset, dst_min_alignment);
625 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
626 }
627
628 if (offset + count > bank->size)
629 return ERROR_FLASH_DST_OUT_OF_BANK;
630
631 if (at91sam7_info->cidr_arch == 0)
632 return ERROR_FLASH_BANK_NOT_PROBED;
633
634 first_page = offset/dst_min_alignment;
635 last_page = CEIL(offset + count, dst_min_alignment);
636
637 DEBUG("first_page: %i, last_page: %i, count %i", first_page, last_page, count);
638
639 /* Configure the flash controller timing */
640 at91sam7_read_clock_info(bank);
641 at91sam7_set_flash_mode(bank,2);
642
643 for (pagen=first_page; pagen<last_page; pagen++) {
644 if (bytes_remaining<dst_min_alignment)
645 count = bytes_remaining;
646 else
647 count = dst_min_alignment;
648 bytes_remaining -= count;
649
650 /* Write one block to the PageWriteBuffer */
651 buffer_pos = (pagen-first_page)*dst_min_alignment;
652 wcount = CEIL(count,4);
653 target->type->write_memory(target, bank->base, 4, wcount, buffer+buffer_pos);
654
655 /* Send Write Page command to Flash Controller */
656 if (at91sam7_flash_command(bank, WP, pagen) != ERROR_OK)
657 {
658 return ERROR_FLASH_OPERATION_FAILED;
659 }
660 DEBUG("Flash command: 0x%x, pagenumber:", fcr, pagen);
661 }
662
663 return ERROR_OK;
664 }
665
666
667 int at91sam7_probe(struct flash_bank_s *bank)
668 {
669 /* we can't probe on an at91sam7
670 * if this is an at91sam7, it has the configured flash
671 */
672 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
673
674 if (at91sam7_info->cidr == 0)
675 {
676 at91sam7_read_part_info(bank);
677 }
678
679 if (at91sam7_info->cidr == 0)
680 {
681 WARNING("Cannot identify target as an AT91SAM");
682 return ERROR_FLASH_OPERATION_FAILED;
683 }
684
685 return ERROR_OK;
686 }
687
688 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size)
689 {
690 int printed;
691 at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
692
693 at91sam7_read_part_info(bank);
694
695 if (at91sam7_info->cidr == 0)
696 {
697 printed = snprintf(buf, buf_size, "Cannot identify target as an AT91SAM\n");
698 buf += printed;
699 buf_size -= printed;
700 return ERROR_FLASH_OPERATION_FAILED;
701 }
702
703 printed = snprintf(buf, buf_size, "\nat91sam7 information:\n");
704 buf += printed;
705 buf_size -= printed;
706
707 printed = snprintf(buf, buf_size, "cidr: 0x%8.8x, arch: 0x%4.4x, eproc: %s, version:0x%3.3x, flashsize: 0x%8.8x\n", at91sam7_info->cidr, at91sam7_info->cidr_arch, EPROC[at91sam7_info->cidr_eproc], at91sam7_info->cidr_version, bank->size);
708 buf += printed;
709 buf_size -= printed;
710
711 printed = snprintf(buf, buf_size, "master clock(estimated): %ikHz \n", at91sam7_info->mck_freq / 1000);
712 buf += printed;
713 buf_size -= printed;
714
715 if (at91sam7_info->num_lockbits>0) {
716 printed = snprintf(buf, buf_size, "pagesize: %i, lockbits: %i 0x%4.4x, pages in lock region: %i \n", at91sam7_info->pagesize, at91sam7_info->num_lockbits, at91sam7_info->lockbits,at91sam7_info->num_pages/at91sam7_info->num_lockbits);
717 buf += printed;
718 buf_size -= printed;
719 }
720
721 printed = snprintf(buf, buf_size, "securitybit: %i, nvmbits: 0x%1.1x\n", at91sam7_info->securitybit, at91sam7_info->nvmbits);
722 buf += printed;
723 buf_size -= printed;
724
725 return ERROR_OK;
726 }
727
728 /*
729 * On AT91SAM7S: When the gpnmv bits are set with
730 * > at91sam7 gpnvm 0 bitnr set
731 * the changes are not visible in the flash controller status register MC_FSR
732 * until the processor has been reset.
733 * On the Olimex board this requires a power cycle.
734 * Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
735 * The maximum number of write/erase cycles for Non Volatile Memory bits is 100. This includes
736 * Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
737 */
738 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
739 {
740 flash_bank_t *bank;
741 int bit;
742 u8 flashcmd;
743 u32 status;
744 char *value;
745 at91sam7_flash_bank_t *at91sam7_info;
746
747 if (argc < 3)
748 {
749 command_print(cmd_ctx, "at91sam7 gpnvm <num> <bit> <set|clear>");
750 return ERROR_OK;
751 }
752
753 bank = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
754 bit = atoi(args[1]);
755 value = args[2];
756
757 if (!bank)
758 {
759 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
760 return ERROR_OK;
761 }
762
763 at91sam7_info = bank->driver_priv;
764
765 if (at91sam7_info->target->state != TARGET_HALTED)
766 {
767 return ERROR_TARGET_NOT_HALTED;
768 }
769
770 if (at91sam7_info->cidr == 0)
771 {
772 at91sam7_read_part_info(bank);
773 }
774
775 if (at91sam7_info->cidr == 0)
776 {
777 WARNING("Cannot identify target as an AT91SAM");
778 return ERROR_FLASH_OPERATION_FAILED;
779 }
780
781 if ((bit<0) || (at91sam7_info->num_nvmbits <= bit))
782 {
783 command_print(cmd_ctx, "gpnvm bit '#%s' is out of bounds for target %s", args[1],at91sam7_info->target_name);
784 return ERROR_OK;
785 }
786
787 if (strcmp(value, "set") == 0)
788 {
789 flashcmd = SGPB;
790 }
791 else if (strcmp(value, "clear") == 0)
792 {
793 flashcmd = CGPB;
794 }
795 else
796 {
797 command_print(cmd_ctx, "usage: at91sam7 gpnvm <num> <bit> <set|clear>");
798 return ERROR_OK;
799 }
800
801 /* Configure the flash controller timing */
802 at91sam7_read_clock_info(bank);
803 at91sam7_set_flash_mode(bank,1);
804
805 if (at91sam7_flash_command(bank, flashcmd, (u16)(bit)) != ERROR_OK)
806 {
807 return ERROR_FLASH_OPERATION_FAILED;
808 }
809
810 status = at91sam7_get_flash_status(bank);
811 DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value 0x%x, status 0x%x \n",flashcmd,bit,status);
812 at91sam7_info->nvmbits = (status>>8)&((1<<at91sam7_info->num_nvmbits)-1);
813
814 return ERROR_OK;
815 }
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