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src/flash/nor: usage/help/doc updates
[openocd/dave.git] / src / flash / nor / str9x.c
blobbf3f750f192dc956d9a584005a5bb65ff423ab44
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 Oyvind Harboe *
9 * oyvind.harboe@zylin.com *
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 "str9x.h"
32 #include <target/arm966e.h>
33 #include <target/algorithm.h>
34
35
36 static uint32_t bank1start = 0x00080000;
37
38 static int str9x_build_block_list(struct flash_bank *bank)
39 {
40 struct str9x_flash_bank *str9x_info = bank->driver_priv;
41
42 int i;
43 int num_sectors;
44 int b0_sectors = 0, b1_sectors = 0;
45 uint32_t offset = 0;
46
47 /* set if we have large flash str9 */
48 str9x_info->variant = 0;
49 str9x_info->bank1 = 0;
50
51 switch (bank->size)
52 {
53 case (256 * 1024):
54 b0_sectors = 4;
55 break;
56 case (512 * 1024):
57 b0_sectors = 8;
58 break;
59 case (1024 * 1024):
60 bank1start = 0x00100000;
61 str9x_info->variant = 1;
62 b0_sectors = 16;
63 break;
64 case (2048 * 1024):
65 bank1start = 0x00200000;
66 str9x_info->variant = 1;
67 b0_sectors = 32;
68 break;
69 case (128 * 1024):
70 str9x_info->variant = 1;
71 str9x_info->bank1 = 1;
72 b1_sectors = 8;
73 bank1start = bank->base;
74 break;
75 case (32 * 1024):
76 str9x_info->bank1 = 1;
77 b1_sectors = 4;
78 bank1start = bank->base;
79 break;
80 default:
81 LOG_ERROR("BUG: unknown bank->size encountered");
82 exit(-1);
83 }
84
85 num_sectors = b0_sectors + b1_sectors;
86
87 bank->num_sectors = num_sectors;
88 bank->sectors = malloc(sizeof(struct flash_sector) * num_sectors);
89 str9x_info->sector_bits = malloc(sizeof(uint32_t) * num_sectors);
90
91 num_sectors = 0;
92
93 for (i = 0; i < b0_sectors; i++)
94 {
95 bank->sectors[num_sectors].offset = offset;
96 bank->sectors[num_sectors].size = 0x10000;
97 offset += bank->sectors[i].size;
98 bank->sectors[num_sectors].is_erased = -1;
99 bank->sectors[num_sectors].is_protected = 1;
100 str9x_info->sector_bits[num_sectors++] = (1 << i);
101 }
102
103 for (i = 0; i < b1_sectors; i++)
104 {
105 bank->sectors[num_sectors].offset = offset;
106 bank->sectors[num_sectors].size = str9x_info->variant == 0 ? 0x2000 : 0x4000;
107 offset += bank->sectors[i].size;
108 bank->sectors[num_sectors].is_erased = -1;
109 bank->sectors[num_sectors].is_protected = 1;
110 if (str9x_info->variant)
111 str9x_info->sector_bits[num_sectors++] = (1 << i);
112 else
113 str9x_info->sector_bits[num_sectors++] = (1 << (i + 8));
114 }
115
116 return ERROR_OK;
117 }
118
119 /* flash bank str9x <base> <size> 0 0 <target#>
120 */
121 FLASH_BANK_COMMAND_HANDLER(str9x_flash_bank_command)
122 {
123 struct str9x_flash_bank *str9x_info;
124
125 if (CMD_ARGC < 6)
126 {
127 LOG_WARNING("incomplete flash_bank str9x configuration");
128 return ERROR_FLASH_BANK_INVALID;
129 }
130
131 str9x_info = malloc(sizeof(struct str9x_flash_bank));
132 bank->driver_priv = str9x_info;
133
134 str9x_build_block_list(bank);
135
136 str9x_info->write_algorithm = NULL;
137
138 return ERROR_OK;
139 }
140
141 static int str9x_protect_check(struct flash_bank *bank)
142 {
143 int retval;
144 struct str9x_flash_bank *str9x_info = bank->driver_priv;
145 struct target *target = bank->target;
146
147 int i;
148 uint32_t adr;
149 uint32_t status = 0;
150 uint16_t hstatus = 0;
151
152 if (bank->target->state != TARGET_HALTED)
153 {
154 LOG_ERROR("Target not halted");
155 return ERROR_TARGET_NOT_HALTED;
156 }
157
158 /* read level one protection */
159
160 if (str9x_info->variant)
161 {
162 if (str9x_info->bank1)
163 {
164 adr = bank1start + 0x18;
165 if ((retval = target_write_u16(target, adr, 0x90)) != ERROR_OK)
166 {
167 return retval;
168 }
169 if ((retval = target_read_u16(target, adr, &hstatus)) != ERROR_OK)
170 {
171 return retval;
172 }
173 status = hstatus;
174 }
175 else
176 {
177 adr = bank1start + 0x14;
178 if ((retval = target_write_u16(target, adr, 0x90)) != ERROR_OK)
179 {
180 return retval;
181 }
182 if ((retval = target_read_u32(target, adr, &status)) != ERROR_OK)
183 {
184 return retval;
185 }
186 }
187 }
188 else
189 {
190 adr = bank1start + 0x10;
191 if ((retval = target_write_u16(target, adr, 0x90)) != ERROR_OK)
192 {
193 return retval;
194 }
195 if ((retval = target_read_u16(target, adr, &hstatus)) != ERROR_OK)
196 {
197 return retval;
198 }
199 status = hstatus;
200 }
201
202 /* read array command */
203 if ((retval = target_write_u16(target, adr, 0xFF)) != ERROR_OK)
204 {
205 return retval;
206 }
207
208 for (i = 0; i < bank->num_sectors; i++)
209 {
210 if (status & str9x_info->sector_bits[i])
211 bank->sectors[i].is_protected = 1;
212 else
213 bank->sectors[i].is_protected = 0;
214 }
215
216 return ERROR_OK;
217 }
218
219 static int str9x_erase(struct flash_bank *bank, int first, int last)
220 {
221 struct target *target = bank->target;
222 int i;
223 uint32_t adr;
224 uint8_t status;
225 uint8_t erase_cmd;
226
227 if (bank->target->state != TARGET_HALTED)
228 {
229 LOG_ERROR("Target not halted");
230 return ERROR_TARGET_NOT_HALTED;
231 }
232
233 /* Check if we erase whole bank */
234 if ((first == 0) && (last == (bank->num_sectors - 1)))
235 {
236 /* Optimize to run erase bank command instead of sector */
237 erase_cmd = 0x80;
238 }
239 else
240 {
241 /* Erase sector command */
242 erase_cmd = 0x20;
243 }
244
245 for (i = first; i <= last; i++)
246 {
247 int retval;
248 adr = bank->base + bank->sectors[i].offset;
249
250 /* erase sectors */
251 if ((retval = target_write_u16(target, adr, erase_cmd)) != ERROR_OK)
252 {
253 return retval;
254 }
255 if ((retval = target_write_u16(target, adr, 0xD0)) != ERROR_OK)
256 {
257 return retval;
258 }
259
260 /* get status */
261 if ((retval = target_write_u16(target, adr, 0x70)) != ERROR_OK)
262 {
263 return retval;
264 }
265
266 int timeout;
267 for (timeout = 0; timeout < 1000; timeout++) {
268 if ((retval = target_read_u8(target, adr, &status)) != ERROR_OK)
269 {
270 return retval;
271 }
272 if (status & 0x80)
273 break;
274 alive_sleep(1);
275 }
276 if (timeout == 1000)
277 {
278 LOG_ERROR("erase timed out");
279 return ERROR_FAIL;
280 }
281
282 /* clear status, also clear read array */
283 if ((retval = target_write_u16(target, adr, 0x50)) != ERROR_OK)
284 {
285 return retval;
286 }
287
288 /* read array command */
289 if ((retval = target_write_u16(target, adr, 0xFF)) != ERROR_OK)
290 {
291 return retval;
292 }
293
294 if (status & 0x22)
295 {
296 LOG_ERROR("error erasing flash bank, status: 0x%x", status);
297 return ERROR_FLASH_OPERATION_FAILED;
298 }
299
300 /* If we ran erase bank command, we are finished */
301 if (erase_cmd == 0x80)
302 break;
303 }
304
305 for (i = first; i <= last; i++)
306 bank->sectors[i].is_erased = 1;
307
308 return ERROR_OK;
309 }
310
311 static int str9x_protect(struct flash_bank *bank,
312 int set, int first, int last)
313 {
314 struct target *target = bank->target;
315 int i;
316 uint32_t adr;
317 uint8_t status;
318
319 if (bank->target->state != TARGET_HALTED)
320 {
321 LOG_ERROR("Target not halted");
322 return ERROR_TARGET_NOT_HALTED;
323 }
324
325 for (i = first; i <= last; i++)
326 {
327 /* Level One Protection */
328
329 adr = bank->base + bank->sectors[i].offset;
330
331 target_write_u16(target, adr, 0x60);
332 if (set)
333 target_write_u16(target, adr, 0x01);
334 else
335 target_write_u16(target, adr, 0xD0);
336
337 /* query status */
338 target_read_u8(target, adr, &status);
339
340 /* clear status, also clear read array */
341 target_write_u16(target, adr, 0x50);
342
343 /* read array command */
344 target_write_u16(target, adr, 0xFF);
345 }
346
347 return ERROR_OK;
348 }
349
350 static int str9x_write_block(struct flash_bank *bank,
351 uint8_t *buffer, uint32_t offset, uint32_t count)
352 {
353 struct str9x_flash_bank *str9x_info = bank->driver_priv;
354 struct target *target = bank->target;
355 uint32_t buffer_size = 8192;
356 struct working_area *source;
357 uint32_t address = bank->base + offset;
358 struct reg_param reg_params[4];
359 struct arm_algorithm armv4_5_info;
360 int retval = ERROR_OK;
361
362 uint32_t str9x_flash_write_code[] = {
363 /* write: */
364 0xe3c14003, /* bic r4, r1, #3 */
365 0xe3a03040, /* mov r3, #0x40 */
366 0xe1c430b0, /* strh r3, [r4, #0] */
367 0xe0d030b2, /* ldrh r3, [r0], #2 */
368 0xe0c130b2, /* strh r3, [r1], #2 */
369 0xe3a03070, /* mov r3, #0x70 */
370 0xe1c430b0, /* strh r3, [r4, #0] */
371 /* busy: */
372 0xe5d43000, /* ldrb r3, [r4, #0] */
373 0xe3130080, /* tst r3, #0x80 */
374 0x0afffffc, /* beq busy */
375 0xe3a05050, /* mov r5, #0x50 */
376 0xe1c450b0, /* strh r5, [r4, #0] */
377 0xe3a050ff, /* mov r5, #0xFF */
378 0xe1c450b0, /* strh r5, [r4, #0] */
379 0xe3130012, /* tst r3, #0x12 */
380 0x1a000001, /* bne exit */
381 0xe2522001, /* subs r2, r2, #1 */
382 0x1affffed, /* bne write */
383 /* exit: */
384 0xeafffffe, /* b exit */
385 };
386
387 /* flash write code */
388 if (target_alloc_working_area(target, 4 * 19, &str9x_info->write_algorithm) != ERROR_OK)
389 {
390 LOG_WARNING("no working area available, can't do block memory writes");
391 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
392 };
393
394 target_write_buffer(target, str9x_info->write_algorithm->address, 19 * 4, (uint8_t*)str9x_flash_write_code);
395
396 /* memory buffer */
397 while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
398 {
399 buffer_size /= 2;
400 if (buffer_size <= 256)
401 {
402 /* if we already allocated the writing code, but failed to get a buffer, free the algorithm */
403 if (str9x_info->write_algorithm)
404 target_free_working_area(target, str9x_info->write_algorithm);
405
406 LOG_WARNING("no large enough working area available, can't do block memory writes");
407 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
408 }
409 }
410
411 armv4_5_info.common_magic = ARM_COMMON_MAGIC;
412 armv4_5_info.core_mode = ARM_MODE_SVC;
413 armv4_5_info.core_state = ARM_STATE_ARM;
414
415 init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
416 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
417 init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
418 init_reg_param(&reg_params[3], "r3", 32, PARAM_IN);
419
420 while (count > 0)
421 {
422 uint32_t thisrun_count = (count > (buffer_size / 2)) ? (buffer_size / 2) : count;
423
424 target_write_buffer(target, source->address, thisrun_count * 2, buffer);
425
426 buf_set_u32(reg_params[0].value, 0, 32, source->address);
427 buf_set_u32(reg_params[1].value, 0, 32, address);
428 buf_set_u32(reg_params[2].value, 0, 32, thisrun_count);
429
430 if ((retval = target_run_algorithm(target, 0, NULL, 4, reg_params, str9x_info->write_algorithm->address, str9x_info->write_algorithm->address + (18 * 4), 10000, &armv4_5_info)) != ERROR_OK)
431 {
432 LOG_ERROR("error executing str9x flash write algorithm");
433 retval = ERROR_FLASH_OPERATION_FAILED;
434 break;
435 }
436
437 if (buf_get_u32(reg_params[3].value, 0, 32) != 0x80)
438 {
439 retval = ERROR_FLASH_OPERATION_FAILED;
440 break;
441 }
442
443 buffer += thisrun_count * 2;
444 address += thisrun_count * 2;
445 count -= thisrun_count;
446 }
447
448 target_free_working_area(target, source);
449 target_free_working_area(target, str9x_info->write_algorithm);
450
451 destroy_reg_param(&reg_params[0]);
452 destroy_reg_param(&reg_params[1]);
453 destroy_reg_param(&reg_params[2]);
454 destroy_reg_param(&reg_params[3]);
455
456 return retval;
457 }
458
459 static int str9x_write(struct flash_bank *bank,
460 uint8_t *buffer, uint32_t offset, uint32_t count)
461 {
462 struct target *target = bank->target;
463 uint32_t words_remaining = (count / 2);
464 uint32_t bytes_remaining = (count & 0x00000001);
465 uint32_t address = bank->base + offset;
466 uint32_t bytes_written = 0;
467 uint8_t status;
468 int retval;
469 uint32_t check_address = offset;
470 uint32_t bank_adr;
471 int i;
472
473 if (bank->target->state != TARGET_HALTED)
474 {
475 LOG_ERROR("Target not halted");
476 return ERROR_TARGET_NOT_HALTED;
477 }
478
479 if (offset & 0x1)
480 {
481 LOG_WARNING("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
482 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
483 }
484
485 for (i = 0; i < bank->num_sectors; i++)
486 {
487 uint32_t sec_start = bank->sectors[i].offset;
488 uint32_t sec_end = sec_start + bank->sectors[i].size;
489
490 /* check if destination falls within the current sector */
491 if ((check_address >= sec_start) && (check_address < sec_end))
492 {
493 /* check if destination ends in the current sector */
494 if (offset + count < sec_end)
495 check_address = offset + count;
496 else
497 check_address = sec_end;
498 }
499 }
500
501 if (check_address != offset + count)
502 return ERROR_FLASH_DST_OUT_OF_BANK;
503
504 /* multiple half words (2-byte) to be programmed? */
505 if (words_remaining > 0)
506 {
507 /* try using a block write */
508 if ((retval = str9x_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK)
509 {
510 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
511 {
512 /* if block write failed (no sufficient working area),
513 * we use normal (slow) single dword accesses */
514 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
515 }
516 else if (retval == ERROR_FLASH_OPERATION_FAILED)
517 {
518 LOG_ERROR("flash writing failed with error code: 0x%x", retval);
519 return ERROR_FLASH_OPERATION_FAILED;
520 }
521 }
522 else
523 {
524 buffer += words_remaining * 2;
525 address += words_remaining * 2;
526 words_remaining = 0;
527 }
528 }
529
530 while (words_remaining > 0)
531 {
532 bank_adr = address & ~0x03;
533
534 /* write data command */
535 target_write_u16(target, bank_adr, 0x40);
536 target_write_memory(target, address, 2, 1, buffer + bytes_written);
537
538 /* get status command */
539 target_write_u16(target, bank_adr, 0x70);
540
541 int timeout;
542 for (timeout = 0; timeout < 1000; timeout++)
543 {
544 target_read_u8(target, bank_adr, &status);
545 if (status & 0x80)
546 break;
547 alive_sleep(1);
548 }
549 if (timeout == 1000)
550 {
551 LOG_ERROR("write timed out");
552 return ERROR_FAIL;
553 }
554
555 /* clear status reg and read array */
556 target_write_u16(target, bank_adr, 0x50);
557 target_write_u16(target, bank_adr, 0xFF);
558
559 if (status & 0x10)
560 return ERROR_FLASH_OPERATION_FAILED;
561 else if (status & 0x02)
562 return ERROR_FLASH_OPERATION_FAILED;
563
564 bytes_written += 2;
565 words_remaining--;
566 address += 2;
567 }
568
569 if (bytes_remaining)
570 {
571 uint8_t last_halfword[2] = {0xff, 0xff};
572 int i = 0;
573
574 while (bytes_remaining > 0)
575 {
576 last_halfword[i++] = *(buffer + bytes_written);
577 bytes_remaining--;
578 bytes_written++;
579 }
580
581 bank_adr = address & ~0x03;
582
583 /* write data command */
584 target_write_u16(target, bank_adr, 0x40);
585 target_write_memory(target, address, 2, 1, last_halfword);
586
587 /* query status command */
588 target_write_u16(target, bank_adr, 0x70);
589
590 int timeout;
591 for (timeout = 0; timeout < 1000; timeout++)
592 {
593 target_read_u8(target, bank_adr, &status);
594 if (status & 0x80)
595 break;
596 alive_sleep(1);
597 }
598 if (timeout == 1000)
599 {
600 LOG_ERROR("write timed out");
601 return ERROR_FAIL;
602 }
603
604 /* clear status reg and read array */
605 target_write_u16(target, bank_adr, 0x50);
606 target_write_u16(target, bank_adr, 0xFF);
607
608 if (status & 0x10)
609 return ERROR_FLASH_OPERATION_FAILED;
610 else if (status & 0x02)
611 return ERROR_FLASH_OPERATION_FAILED;
612 }
613
614 return ERROR_OK;
615 }
616
617 static int str9x_probe(struct flash_bank *bank)
618 {
619 return ERROR_OK;
620 }
621
622 #if 0
623 COMMAND_HANDLER(str9x_handle_part_id_command)
624 {
625 return ERROR_OK;
626 }
627 #endif
628
629 static int str9x_info(struct flash_bank *bank, char *buf, int buf_size)
630 {
631 snprintf(buf, buf_size, "str9x flash driver info");
632 return ERROR_OK;
633 }
634
635 COMMAND_HANDLER(str9x_handle_flash_config_command)
636 {
637 struct str9x_flash_bank *str9x_info;
638 struct target *target = NULL;
639
640 if (CMD_ARGC < 5)
641 {
642 return ERROR_COMMAND_SYNTAX_ERROR;
643 }
644
645 struct flash_bank *bank;
646 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
647 if (ERROR_OK != retval)
648 return retval;
649
650 uint32_t bbsr, nbbsr, bbadr, nbbadr;
651 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], bbsr);
652 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], nbbsr);
653 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], bbadr);
654 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[4], nbbadr);
655
656 str9x_info = bank->driver_priv;
657
658 target = bank->target;
659
660 if (bank->target->state != TARGET_HALTED)
661 {
662 LOG_ERROR("Target not halted");
663 return ERROR_TARGET_NOT_HALTED;
664 }
665
666 /* config flash controller */
667 target_write_u32(target, FLASH_BBSR, bbsr);
668 target_write_u32(target, FLASH_NBBSR, nbbsr);
669 target_write_u32(target, FLASH_BBADR, bbadr >> 2);
670 target_write_u32(target, FLASH_NBBADR, nbbadr >> 2);
671
672 /* set bit 18 instruction TCM order as per flash programming manual */
673 arm966e_write_cp15(target, 62, 0x40000);
674
675 /* enable flash bank 1 */
676 target_write_u32(target, FLASH_CR, 0x18);
677 return ERROR_OK;
678 }
679
680 static const struct command_registration str9x_config_command_handlers[] = {
681 {
682 .name = "flash_config",
683 .handler = &str9x_handle_flash_config_command,
684 .mode = COMMAND_EXEC,
685 .help = "Configure str9x flash controller, prior to "
686 "programming the flash.",
687 .usage = "bank_id BBSR NBBSR BBADR NBBADR",
688 },
689 COMMAND_REGISTRATION_DONE
690 };
691 static const struct command_registration str9x_command_handlers[] = {
692 {
693 .name = "str9x",
694 .mode = COMMAND_ANY,
695 .help = "str9x flash command group",
696 .chain = str9x_config_command_handlers,
697 },
698 COMMAND_REGISTRATION_DONE
699 };
700
701 struct flash_driver str9x_flash = {
702 .name = "str9x",
703 .commands = str9x_command_handlers,
704 .flash_bank_command = &str9x_flash_bank_command,
705 .erase = &str9x_erase,
706 .protect = &str9x_protect,
707 .write = &str9x_write,
708 .probe = &str9x_probe,
709 .auto_probe = &str9x_probe,
710 .erase_check = &default_flash_blank_check,
711 .protect_check = &str9x_protect_check,
712 .info = &str9x_info,
713 };
Some of Dave's pending patches