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[openocd.git] / src / flash / nor / stm32f1x.c
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) 2011 by Andreas Fritiofson *
9 * andreas.fritiofson@gmail.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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
25 ***************************************************************************/
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include "imp.h"
32 #include <helper/binarybuffer.h>
33 #include <target/algorithm.h>
34 #include <target/armv7m.h>
35
36 /* stm32x register locations */
37
38 #define FLASH_REG_BASE_B0 0x40022000
39 #define FLASH_REG_BASE_B1 0x40022040
40
41 #define STM32_FLASH_ACR 0x00
42 #define STM32_FLASH_KEYR 0x04
43 #define STM32_FLASH_OPTKEYR 0x08
44 #define STM32_FLASH_SR 0x0C
45 #define STM32_FLASH_CR 0x10
46 #define STM32_FLASH_AR 0x14
47 #define STM32_FLASH_OBR 0x1C
48 #define STM32_FLASH_WRPR 0x20
49
50 /* TODO: Check if code using these really should be hard coded to bank 0.
51 * There are valid cases, on dual flash devices the protection of the
52 * second bank is done on the bank0 reg's. */
53 #define STM32_FLASH_ACR_B0 0x40022000
54 #define STM32_FLASH_KEYR_B0 0x40022004
55 #define STM32_FLASH_OPTKEYR_B0 0x40022008
56 #define STM32_FLASH_SR_B0 0x4002200C
57 #define STM32_FLASH_CR_B0 0x40022010
58 #define STM32_FLASH_AR_B0 0x40022014
59 #define STM32_FLASH_OBR_B0 0x4002201C
60 #define STM32_FLASH_WRPR_B0 0x40022020
61
62 /* option byte location */
63
64 #define STM32_OB_RDP 0x1FFFF800
65 #define STM32_OB_USER 0x1FFFF802
66 #define STM32_OB_DATA0 0x1FFFF804
67 #define STM32_OB_DATA1 0x1FFFF806
68 #define STM32_OB_WRP0 0x1FFFF808
69 #define STM32_OB_WRP1 0x1FFFF80A
70 #define STM32_OB_WRP2 0x1FFFF80C
71 #define STM32_OB_WRP3 0x1FFFF80E
72
73 /* FLASH_CR register bits */
74
75 #define FLASH_PG (1 << 0)
76 #define FLASH_PER (1 << 1)
77 #define FLASH_MER (1 << 2)
78 #define FLASH_OPTPG (1 << 4)
79 #define FLASH_OPTER (1 << 5)
80 #define FLASH_STRT (1 << 6)
81 #define FLASH_LOCK (1 << 7)
82 #define FLASH_OPTWRE (1 << 9)
83
84 /* FLASH_SR register bits */
85
86 #define FLASH_BSY (1 << 0)
87 #define FLASH_PGERR (1 << 2)
88 #define FLASH_WRPRTERR (1 << 4)
89 #define FLASH_EOP (1 << 5)
90
91 /* STM32_FLASH_OBR bit definitions (reading) */
92
93 #define OPT_ERROR 0
94 #define OPT_READOUT 1
95 #define OPT_RDWDGSW 2
96 #define OPT_RDRSTSTOP 3
97 #define OPT_RDRSTSTDBY 4
98 #define OPT_BFB2 5 /* dual flash bank only */
99
100 /* register unlock keys */
101
102 #define KEY1 0x45670123
103 #define KEY2 0xCDEF89AB
104
105 /* timeout values */
106
107 #define FLASH_WRITE_TIMEOUT 10
108 #define FLASH_ERASE_TIMEOUT 100
109
110 struct stm32x_options {
111 uint16_t RDP;
112 uint16_t user_options;
113 uint16_t user_data;
114 uint16_t protection[4];
115 };
116
117 struct stm32x_flash_bank {
118 struct stm32x_options option_bytes;
119 int ppage_size;
120 int probed;
121
122 bool has_dual_banks;
123 /* used to access dual flash bank stm32xl */
124 uint32_t register_base;
125 uint16_t default_rdp;
126 int user_data_offset;
127 int option_offset;
128 uint32_t user_bank_size;
129 };
130
131 static int stm32x_mass_erase(struct flash_bank *bank);
132 static int stm32x_get_device_id(struct flash_bank *bank, uint32_t *device_id);
133 static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
134 uint32_t offset, uint32_t count);
135
136 /* flash bank stm32x <base> <size> 0 0 <target#>
137 */
138 FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
139 {
140 struct stm32x_flash_bank *stm32x_info;
141
142 if (CMD_ARGC < 6)
143 return ERROR_COMMAND_SYNTAX_ERROR;
144
145 stm32x_info = malloc(sizeof(struct stm32x_flash_bank));
146
147 bank->driver_priv = stm32x_info;
148 stm32x_info->probed = 0;
149 stm32x_info->has_dual_banks = false;
150 stm32x_info->register_base = FLASH_REG_BASE_B0;
151 stm32x_info->user_bank_size = bank->size;
152
153 return ERROR_OK;
154 }
155
156 static inline int stm32x_get_flash_reg(struct flash_bank *bank, uint32_t reg)
157 {
158 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
159 return reg + stm32x_info->register_base;
160 }
161
162 static inline int stm32x_get_flash_status(struct flash_bank *bank, uint32_t *status)
163 {
164 struct target *target = bank->target;
165 return target_read_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), status);
166 }
167
168 static int stm32x_wait_status_busy(struct flash_bank *bank, int timeout)
169 {
170 struct target *target = bank->target;
171 uint32_t status;
172 int retval = ERROR_OK;
173
174 /* wait for busy to clear */
175 for (;;) {
176 retval = stm32x_get_flash_status(bank, &status);
177 if (retval != ERROR_OK)
178 return retval;
179 LOG_DEBUG("status: 0x%" PRIx32 "", status);
180 if ((status & FLASH_BSY) == 0)
181 break;
182 if (timeout-- <= 0) {
183 LOG_ERROR("timed out waiting for flash");
184 return ERROR_FAIL;
185 }
186 alive_sleep(1);
187 }
188
189 if (status & FLASH_WRPRTERR) {
190 LOG_ERROR("stm32x device protected");
191 retval = ERROR_FAIL;
192 }
193
194 if (status & FLASH_PGERR) {
195 LOG_ERROR("stm32x device programming failed");
196 retval = ERROR_FAIL;
197 }
198
199 /* Clear but report errors */
200 if (status & (FLASH_WRPRTERR | FLASH_PGERR)) {
201 /* If this operation fails, we ignore it and report the original
202 * retval
203 */
204 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR),
205 FLASH_WRPRTERR | FLASH_PGERR);
206 }
207 return retval;
208 }
209
210 static int stm32x_check_operation_supported(struct flash_bank *bank)
211 {
212 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
213
214 /* if we have a dual flash bank device then
215 * we need to perform option byte stuff on bank0 only */
216 if (stm32x_info->register_base != FLASH_REG_BASE_B0) {
217 LOG_ERROR("Option Byte Operation's must use bank0");
218 return ERROR_FLASH_OPERATION_FAILED;
219 }
220
221 return ERROR_OK;
222 }
223
224 static int stm32x_read_options(struct flash_bank *bank)
225 {
226 uint32_t optiondata;
227 struct stm32x_flash_bank *stm32x_info = NULL;
228 struct target *target = bank->target;
229
230 stm32x_info = bank->driver_priv;
231
232 /* read current option bytes */
233 int retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optiondata);
234 if (retval != ERROR_OK)
235 return retval;
236
237 stm32x_info->option_bytes.user_options = (optiondata >> stm32x_info->option_offset >> 2) & 0xffff;
238 stm32x_info->option_bytes.user_data = (optiondata >> stm32x_info->user_data_offset) & 0xffff;
239 stm32x_info->option_bytes.RDP = (optiondata & (1 << OPT_READOUT)) ? 0xFFFF : 0x5AA5;
240
241 if (optiondata & (1 << OPT_READOUT))
242 LOG_INFO("Device Security Bit Set");
243
244 /* each bit refers to a 4bank protection */
245 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &optiondata);
246 if (retval != ERROR_OK)
247 return retval;
248
249 stm32x_info->option_bytes.protection[0] = (uint16_t)optiondata;
250 stm32x_info->option_bytes.protection[1] = (uint16_t)(optiondata >> 8);
251 stm32x_info->option_bytes.protection[2] = (uint16_t)(optiondata >> 16);
252 stm32x_info->option_bytes.protection[3] = (uint16_t)(optiondata >> 24);
253
254 return ERROR_OK;
255 }
256
257 static int stm32x_erase_options(struct flash_bank *bank)
258 {
259 struct stm32x_flash_bank *stm32x_info = NULL;
260 struct target *target = bank->target;
261
262 stm32x_info = bank->driver_priv;
263
264 /* read current options */
265 stm32x_read_options(bank);
266
267 /* unlock flash registers */
268 int retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY1);
269 if (retval != ERROR_OK)
270 return retval;
271
272 retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY2);
273 if (retval != ERROR_OK)
274 return retval;
275
276 /* unlock option flash registers */
277 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY1);
278 if (retval != ERROR_OK)
279 return retval;
280 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY2);
281 if (retval != ERROR_OK)
282 return retval;
283
284 /* erase option bytes */
285 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTER | FLASH_OPTWRE);
286 if (retval != ERROR_OK)
287 return retval;
288 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTER | FLASH_STRT | FLASH_OPTWRE);
289 if (retval != ERROR_OK)
290 return retval;
291
292 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
293 if (retval != ERROR_OK)
294 return retval;
295
296 /* clear readout protection and complementary option bytes
297 * this will also force a device unlock if set */
298 stm32x_info->option_bytes.RDP = stm32x_info->default_rdp;
299
300 return ERROR_OK;
301 }
302
303 static int stm32x_write_options(struct flash_bank *bank)
304 {
305 struct stm32x_flash_bank *stm32x_info = NULL;
306 struct target *target = bank->target;
307
308 stm32x_info = bank->driver_priv;
309
310 /* unlock flash registers */
311 int retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY1);
312 if (retval != ERROR_OK)
313 return retval;
314 retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY2);
315 if (retval != ERROR_OK)
316 return retval;
317
318 /* unlock option flash registers */
319 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY1);
320 if (retval != ERROR_OK)
321 return retval;
322 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY2);
323 if (retval != ERROR_OK)
324 return retval;
325
326 /* program option bytes */
327 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTPG | FLASH_OPTWRE);
328 if (retval != ERROR_OK)
329 return retval;
330
331 uint8_t opt_bytes[16];
332
333 target_buffer_set_u16(target, opt_bytes, stm32x_info->option_bytes.RDP);
334 target_buffer_set_u16(target, opt_bytes + 2, stm32x_info->option_bytes.user_options);
335 target_buffer_set_u16(target, opt_bytes + 4, stm32x_info->option_bytes.user_data & 0xff);
336 target_buffer_set_u16(target, opt_bytes + 6, (stm32x_info->option_bytes.user_data >> 8) & 0xff);
337 target_buffer_set_u16(target, opt_bytes + 8, stm32x_info->option_bytes.protection[0]);
338 target_buffer_set_u16(target, opt_bytes + 10, stm32x_info->option_bytes.protection[1]);
339 target_buffer_set_u16(target, opt_bytes + 12, stm32x_info->option_bytes.protection[2]);
340 target_buffer_set_u16(target, opt_bytes + 14, stm32x_info->option_bytes.protection[3]);
341
342 uint32_t offset = STM32_OB_RDP - bank->base;
343 retval = stm32x_write_block(bank, opt_bytes, offset, sizeof(opt_bytes) / 2);
344 if (retval != ERROR_OK) {
345 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
346 LOG_ERROR("working area required to erase options bytes");
347 return retval;
348 }
349
350 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_LOCK);
351 if (retval != ERROR_OK)
352 return retval;
353
354 return ERROR_OK;
355 }
356
357 static int stm32x_protect_check(struct flash_bank *bank)
358 {
359 struct target *target = bank->target;
360 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
361
362 uint32_t protection;
363 int i, s;
364 int num_bits;
365 int set;
366
367 int retval = stm32x_check_operation_supported(bank);
368 if (ERROR_OK != retval)
369 return retval;
370
371 /* medium density - each bit refers to a 4bank protection
372 * high density - each bit refers to a 2bank protection */
373 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection);
374 if (retval != ERROR_OK)
375 return retval;
376
377 /* medium density - each protection bit is for 4 * 1K pages
378 * high density - each protection bit is for 2 * 2K pages */
379 num_bits = (bank->num_sectors / stm32x_info->ppage_size);
380
381 if (stm32x_info->ppage_size == 2) {
382 /* high density flash/connectivity line protection */
383
384 set = 1;
385
386 if (protection & (1 << 31))
387 set = 0;
388
389 /* bit 31 controls sector 62 - 255 protection for high density
390 * bit 31 controls sector 62 - 127 protection for connectivity line */
391 for (s = 62; s < bank->num_sectors; s++)
392 bank->sectors[s].is_protected = set;
393
394 if (bank->num_sectors > 61)
395 num_bits = 31;
396
397 for (i = 0; i < num_bits; i++) {
398 set = 1;
399
400 if (protection & (1 << i))
401 set = 0;
402
403 for (s = 0; s < stm32x_info->ppage_size; s++)
404 bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set;
405 }
406 } else {
407 /* low/medium density flash protection */
408 for (i = 0; i < num_bits; i++) {
409 set = 1;
410
411 if (protection & (1 << i))
412 set = 0;
413
414 for (s = 0; s < stm32x_info->ppage_size; s++)
415 bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set;
416 }
417 }
418
419 return ERROR_OK;
420 }
421
422 static int stm32x_erase(struct flash_bank *bank, int first, int last)
423 {
424 struct target *target = bank->target;
425 int i;
426
427 if (bank->target->state != TARGET_HALTED) {
428 LOG_ERROR("Target not halted");
429 return ERROR_TARGET_NOT_HALTED;
430 }
431
432 if ((first == 0) && (last == (bank->num_sectors - 1)))
433 return stm32x_mass_erase(bank);
434
435 /* unlock flash registers */
436 int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
437 if (retval != ERROR_OK)
438 return retval;
439 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
440 if (retval != ERROR_OK)
441 return retval;
442
443 for (i = first; i <= last; i++) {
444 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER);
445 if (retval != ERROR_OK)
446 return retval;
447 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_AR),
448 bank->base + bank->sectors[i].offset);
449 if (retval != ERROR_OK)
450 return retval;
451 retval = target_write_u32(target,
452 stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER | FLASH_STRT);
453 if (retval != ERROR_OK)
454 return retval;
455
456 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
457 if (retval != ERROR_OK)
458 return retval;
459
460 bank->sectors[i].is_erased = 1;
461 }
462
463 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
464 if (retval != ERROR_OK)
465 return retval;
466
467 return ERROR_OK;
468 }
469
470 static int stm32x_protect(struct flash_bank *bank, int set, int first, int last)
471 {
472 struct stm32x_flash_bank *stm32x_info = NULL;
473 struct target *target = bank->target;
474 uint16_t prot_reg[4] = {0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF};
475 int i, reg, bit;
476 int status;
477 uint32_t protection;
478
479 stm32x_info = bank->driver_priv;
480
481 if (target->state != TARGET_HALTED) {
482 LOG_ERROR("Target not halted");
483 return ERROR_TARGET_NOT_HALTED;
484 }
485
486 int retval = stm32x_check_operation_supported(bank);
487 if (ERROR_OK != retval)
488 return retval;
489
490 if ((first % stm32x_info->ppage_size) != 0) {
491 LOG_WARNING("aligned start protect sector to a %d sector boundary",
492 stm32x_info->ppage_size);
493 first = first - (first % stm32x_info->ppage_size);
494 }
495 if (((last + 1) % stm32x_info->ppage_size) != 0) {
496 LOG_WARNING("aligned end protect sector to a %d sector boundary",
497 stm32x_info->ppage_size);
498 last++;
499 last = last - (last % stm32x_info->ppage_size);
500 last--;
501 }
502
503 /* medium density - each bit refers to a 4bank protection
504 * high density - each bit refers to a 2bank protection */
505 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection);
506 if (retval != ERROR_OK)
507 return retval;
508
509 prot_reg[0] = (uint16_t)protection;
510 prot_reg[1] = (uint16_t)(protection >> 8);
511 prot_reg[2] = (uint16_t)(protection >> 16);
512 prot_reg[3] = (uint16_t)(protection >> 24);
513
514 if (stm32x_info->ppage_size == 2) {
515 /* high density flash */
516
517 /* bit 7 controls sector 62 - 255 protection */
518 if (last > 61) {
519 if (set)
520 prot_reg[3] &= ~(1 << 7);
521 else
522 prot_reg[3] |= (1 << 7);
523 }
524
525 if (first > 61)
526 first = 62;
527 if (last > 61)
528 last = 61;
529
530 for (i = first; i <= last; i++) {
531 reg = (i / stm32x_info->ppage_size) / 8;
532 bit = (i / stm32x_info->ppage_size) - (reg * 8);
533
534 if (set)
535 prot_reg[reg] &= ~(1 << bit);
536 else
537 prot_reg[reg] |= (1 << bit);
538 }
539 } else {
540 /* medium density flash */
541 for (i = first; i <= last; i++) {
542 reg = (i / stm32x_info->ppage_size) / 8;
543 bit = (i / stm32x_info->ppage_size) - (reg * 8);
544
545 if (set)
546 prot_reg[reg] &= ~(1 << bit);
547 else
548 prot_reg[reg] |= (1 << bit);
549 }
550 }
551
552 status = stm32x_erase_options(bank);
553 if (status != ERROR_OK)
554 return status;
555
556 stm32x_info->option_bytes.protection[0] = prot_reg[0];
557 stm32x_info->option_bytes.protection[1] = prot_reg[1];
558 stm32x_info->option_bytes.protection[2] = prot_reg[2];
559 stm32x_info->option_bytes.protection[3] = prot_reg[3];
560
561 return stm32x_write_options(bank);
562 }
563
564 static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
565 uint32_t offset, uint32_t count)
566 {
567 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
568 struct target *target = bank->target;
569 uint32_t buffer_size = 16384;
570 struct working_area *write_algorithm;
571 struct working_area *source;
572 uint32_t address = bank->base + offset;
573 struct reg_param reg_params[5];
574 struct armv7m_algorithm armv7m_info;
575 int retval = ERROR_OK;
576
577 /* see contrib/loaders/flash/stm32f1x.S for src */
578
579 static const uint8_t stm32x_flash_write_code[] = {
580 /* #define STM32_FLASH_SR_OFFSET 0x0C */
581 /* wait_fifo: */
582 0x16, 0x68, /* ldr r6, [r2, #0] */
583 0x00, 0x2e, /* cmp r6, #0 */
584 0x18, 0xd0, /* beq exit */
585 0x55, 0x68, /* ldr r5, [r2, #4] */
586 0xb5, 0x42, /* cmp r5, r6 */
587 0xf9, 0xd0, /* beq wait_fifo */
588 0x2e, 0x88, /* ldrh r6, [r5, #0] */
589 0x26, 0x80, /* strh r6, [r4, #0] */
590 0x02, 0x35, /* adds r5, #2 */
591 0x02, 0x34, /* adds r4, #2 */
592 /* busy: */
593 0xc6, 0x68, /* ldr r6, [r0, #STM32_FLASH_SR_OFFSET] */
594 0x01, 0x27, /* movs r7, #1 */
595 0x3e, 0x42, /* tst r6, r7 */
596 0xfb, 0xd1, /* bne busy */
597 0x14, 0x27, /* movs r7, #0x14 */
598 0x3e, 0x42, /* tst r6, r7 */
599 0x08, 0xd1, /* bne error */
600 0x9d, 0x42, /* cmp r5, r3 */
601 0x01, 0xd3, /* bcc no_wrap */
602 0x15, 0x46, /* mov r5, r2 */
603 0x08, 0x35, /* adds r5, #8 */
604 /* no_wrap: */
605 0x55, 0x60, /* str r5, [r2, #4] */
606 0x01, 0x39, /* subs r1, r1, #1 */
607 0x00, 0x29, /* cmp r1, #0 */
608 0x02, 0xd0, /* beq exit */
609 0xe5, 0xe7, /* b wait_fifo */
610 /* error: */
611 0x00, 0x20, /* movs r0, #0 */
612 0x50, 0x60, /* str r0, [r2, #4] */
613 /* exit: */
614 0x30, 0x46, /* mov r0, r6 */
615 0x00, 0xbe, /* bkpt #0 */
616 };
617
618 /* flash write code */
619 if (target_alloc_working_area(target, sizeof(stm32x_flash_write_code),
620 &write_algorithm) != ERROR_OK) {
621 LOG_WARNING("no working area available, can't do block memory writes");
622 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
623 };
624
625 retval = target_write_buffer(target, write_algorithm->address,
626 sizeof(stm32x_flash_write_code), (uint8_t *)stm32x_flash_write_code);
627 if (retval != ERROR_OK)
628 return retval;
629
630 /* memory buffer */
631 while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
632 buffer_size /= 2;
633 buffer_size &= ~3UL; /* Make sure it's 4 byte aligned */
634 if (buffer_size <= 256) {
635 /* we already allocated the writing code, but failed to get a
636 * buffer, free the algorithm */
637 target_free_working_area(target, write_algorithm);
638
639 LOG_WARNING("no large enough working area available, can't do block memory writes");
640 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
641 }
642 };
643
644 init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT); /* flash base (in), status (out) */
645 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT); /* count (halfword-16bit) */
646 init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT); /* buffer start */
647 init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT); /* buffer end */
648 init_reg_param(&reg_params[4], "r4", 32, PARAM_IN_OUT); /* target address */
649
650 buf_set_u32(reg_params[0].value, 0, 32, stm32x_info->register_base);
651 buf_set_u32(reg_params[1].value, 0, 32, count);
652 buf_set_u32(reg_params[2].value, 0, 32, source->address);
653 buf_set_u32(reg_params[3].value, 0, 32, source->address + source->size);
654 buf_set_u32(reg_params[4].value, 0, 32, address);
655
656 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
657 armv7m_info.core_mode = ARM_MODE_THREAD;
658
659 retval = target_run_flash_async_algorithm(target, buffer, count, 2,
660 0, NULL,
661 5, reg_params,
662 source->address, source->size,
663 write_algorithm->address, 0,
664 &armv7m_info);
665
666 if (retval == ERROR_FLASH_OPERATION_FAILED) {
667 LOG_ERROR("flash write failed at address 0x%"PRIx32,
668 buf_get_u32(reg_params[4].value, 0, 32));
669
670 if (buf_get_u32(reg_params[0].value, 0, 32) & FLASH_PGERR) {
671 LOG_ERROR("flash memory not erased before writing");
672 /* Clear but report errors */
673 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), FLASH_PGERR);
674 }
675
676 if (buf_get_u32(reg_params[0].value, 0, 32) & FLASH_WRPRTERR) {
677 LOG_ERROR("flash memory write protected");
678 /* Clear but report errors */
679 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), FLASH_WRPRTERR);
680 }
681 }
682
683 target_free_working_area(target, source);
684 target_free_working_area(target, write_algorithm);
685
686 destroy_reg_param(&reg_params[0]);
687 destroy_reg_param(&reg_params[1]);
688 destroy_reg_param(&reg_params[2]);
689 destroy_reg_param(&reg_params[3]);
690 destroy_reg_param(&reg_params[4]);
691
692 return retval;
693 }
694
695 static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
696 uint32_t offset, uint32_t count)
697 {
698 struct target *target = bank->target;
699 uint8_t *new_buffer = NULL;
700
701 if (bank->target->state != TARGET_HALTED) {
702 LOG_ERROR("Target not halted");
703 return ERROR_TARGET_NOT_HALTED;
704 }
705
706 if (offset & 0x1) {
707 LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
708 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
709 }
710
711 /* If there's an odd number of bytes, the data has to be padded. Duplicate
712 * the buffer and use the normal code path with a single block write since
713 * it's probably cheaper than to special case the last odd write using
714 * discrete accesses. */
715 if (count & 1) {
716 new_buffer = malloc(count + 1);
717 if (new_buffer == NULL) {
718 LOG_ERROR("odd number of bytes to write and no memory for padding buffer");
719 return ERROR_FAIL;
720 }
721 LOG_INFO("odd number of bytes to write, padding with 0xff");
722 buffer = memcpy(new_buffer, buffer, count);
723 buffer[count++] = 0xff;
724 }
725
726 uint32_t words_remaining = count / 2;
727 int retval, retval2;
728
729 /* unlock flash registers */
730 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
731 if (retval != ERROR_OK)
732 goto cleanup;
733 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
734 if (retval != ERROR_OK)
735 goto cleanup;
736
737 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PG);
738 if (retval != ERROR_OK)
739 goto cleanup;
740
741 /* try using a block write */
742 retval = stm32x_write_block(bank, buffer, offset, words_remaining);
743
744 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
745 /* if block write failed (no sufficient working area),
746 * we use normal (slow) single halfword accesses */
747 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
748
749 while (words_remaining > 0) {
750 uint16_t value;
751 memcpy(&value, buffer, sizeof(uint16_t));
752
753 retval = target_write_u16(target, bank->base + offset, value);
754 if (retval != ERROR_OK)
755 goto reset_pg_and_lock;
756
757 retval = stm32x_wait_status_busy(bank, 5);
758 if (retval != ERROR_OK)
759 goto reset_pg_and_lock;
760
761 words_remaining--;
762 buffer += 2;
763 offset += 2;
764 }
765 }
766
767 reset_pg_and_lock:
768 retval2 = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
769 if (retval == ERROR_OK)
770 retval = retval2;
771
772 cleanup:
773 if (new_buffer)
774 free(new_buffer);
775
776 return retval;
777 }
778
779 static int stm32x_get_device_id(struct flash_bank *bank, uint32_t *device_id)
780 {
781 /* This check the device CPUID core register to detect
782 * the M0 from the M3 devices. */
783
784 struct target *target = bank->target;
785 uint32_t cpuid, device_id_register = 0;
786
787 /* Get the CPUID from the ARM Core
788 * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0432c/DDI0432C_cortex_m0_r0p0_trm.pdf 4.2.1 */
789 int retval = target_read_u32(target, 0xE000ED00, &cpuid);
790 if (retval != ERROR_OK)
791 return retval;
792
793 if (((cpuid >> 4) & 0xFFF) == 0xC20) {
794 /* 0xC20 is M0 devices */
795 device_id_register = 0x40015800;
796 } else if (((cpuid >> 4) & 0xFFF) == 0xC23) {
797 /* 0xC23 is M3 devices */
798 device_id_register = 0xE0042000;
799 } else if (((cpuid >> 4) & 0xFFF) == 0xC24) {
800 /* 0xC24 is M4 devices */
801 device_id_register = 0xE0042000;
802 } else {
803 LOG_ERROR("Cannot identify target as a stm32x");
804 return ERROR_FAIL;
805 }
806
807 /* read stm32 device id register */
808 retval = target_read_u32(target, device_id_register, device_id);
809 if (retval != ERROR_OK)
810 return retval;
811
812 return retval;
813 }
814
815 static int stm32x_get_flash_size(struct flash_bank *bank, uint16_t *flash_size_in_kb)
816 {
817 struct target *target = bank->target;
818 uint32_t cpuid, flash_size_reg;
819
820 int retval = target_read_u32(target, 0xE000ED00, &cpuid);
821 if (retval != ERROR_OK)
822 return retval;
823
824 if (((cpuid >> 4) & 0xFFF) == 0xC20) {
825 /* 0xC20 is M0 devices */
826 flash_size_reg = 0x1FFFF7CC;
827 } else if (((cpuid >> 4) & 0xFFF) == 0xC23) {
828 /* 0xC23 is M3 devices */
829 flash_size_reg = 0x1FFFF7E0;
830 } else if (((cpuid >> 4) & 0xFFF) == 0xC24) {
831 /* 0xC24 is M4 devices */
832 flash_size_reg = 0x1FFFF7CC;
833 } else {
834 LOG_ERROR("Cannot identify target as a stm32x");
835 return ERROR_FAIL;
836 }
837
838 retval = target_read_u16(target, flash_size_reg, flash_size_in_kb);
839 if (retval != ERROR_OK)
840 return retval;
841
842 return retval;
843 }
844
845 static int stm32x_probe(struct flash_bank *bank)
846 {
847 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
848 int i;
849 uint16_t flash_size_in_kb;
850 uint16_t max_flash_size_in_kb;
851 uint32_t device_id;
852 int page_size;
853 uint32_t base_address = 0x08000000;
854
855 stm32x_info->probed = 0;
856 stm32x_info->register_base = FLASH_REG_BASE_B0;
857 stm32x_info->user_data_offset = 10;
858 stm32x_info->option_offset = 0;
859
860 /* default factory protection level */
861 stm32x_info->default_rdp = 0x5AA5;
862
863 /* read stm32 device id register */
864 int retval = stm32x_get_device_id(bank, &device_id);
865 if (retval != ERROR_OK)
866 return retval;
867
868 LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
869
870 /* set page size, protection granularity and max flash size depending on family */
871 switch (device_id & 0xfff) {
872 case 0x410: /* medium density */
873 page_size = 1024;
874 stm32x_info->ppage_size = 4;
875 max_flash_size_in_kb = 128;
876 break;
877 case 0x412: /* low density */
878 page_size = 1024;
879 stm32x_info->ppage_size = 4;
880 max_flash_size_in_kb = 32;
881 break;
882 case 0x414: /* high density */
883 page_size = 2048;
884 stm32x_info->ppage_size = 2;
885 max_flash_size_in_kb = 512;
886 break;
887 case 0x418: /* connectivity line density */
888 page_size = 2048;
889 stm32x_info->ppage_size = 2;
890 max_flash_size_in_kb = 256;
891 break;
892 case 0x420: /* value line density */
893 page_size = 1024;
894 stm32x_info->ppage_size = 4;
895 max_flash_size_in_kb = 128;
896 break;
897 case 0x422: /* stm32f30x */
898 page_size = 2048;
899 stm32x_info->ppage_size = 2;
900 max_flash_size_in_kb = 256;
901 stm32x_info->user_data_offset = 16;
902 stm32x_info->option_offset = 6;
903 stm32x_info->default_rdp = 0x55AA;
904 break;
905 case 0x428: /* value line High density */
906 page_size = 2048;
907 stm32x_info->ppage_size = 4;
908 max_flash_size_in_kb = 128;
909 break;
910 case 0x430: /* xl line density (dual flash banks) */
911 page_size = 2048;
912 stm32x_info->ppage_size = 2;
913 max_flash_size_in_kb = 1024;
914 stm32x_info->has_dual_banks = true;
915 break;
916 case 0x432: /* stm32f37x */
917 page_size = 2048;
918 stm32x_info->ppage_size = 2;
919 max_flash_size_in_kb = 256;
920 stm32x_info->user_data_offset = 16;
921 stm32x_info->option_offset = 6;
922 stm32x_info->default_rdp = 0x55AA;
923 break;
924 case 0x440: /* stm32f0x */
925 case 0x444:
926 page_size = 1024;
927 stm32x_info->ppage_size = 4;
928 max_flash_size_in_kb = 64;
929 stm32x_info->user_data_offset = 16;
930 stm32x_info->option_offset = 6;
931 stm32x_info->default_rdp = 0x55AA;
932 break;
933 default:
934 LOG_WARNING("Cannot identify target as a STM32 family.");
935 return ERROR_FAIL;
936 }
937
938 /* get flash size from target. */
939 retval = stm32x_get_flash_size(bank, &flash_size_in_kb);
940
941 /* failed reading flash size or flash size invalid (early silicon),
942 * default to max target family */
943 if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
944 LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
945 max_flash_size_in_kb);
946 flash_size_in_kb = max_flash_size_in_kb;
947 }
948
949 if (stm32x_info->has_dual_banks) {
950 /* split reported size into matching bank */
951 if (bank->base != 0x08080000) {
952 /* bank 0 will be fixed 512k */
953 flash_size_in_kb = 512;
954 } else {
955 flash_size_in_kb -= 512;
956 /* bank1 also uses a register offset */
957 stm32x_info->register_base = FLASH_REG_BASE_B1;
958 base_address = 0x08080000;
959 }
960 }
961
962 /* if the user sets the size manually then ignore the probed value
963 * this allows us to work around devices that have a invalid flash size register value */
964 if (stm32x_info->user_bank_size) {
965 LOG_INFO("ignoring flash probed value, using configured bank size");
966 flash_size_in_kb = stm32x_info->user_bank_size / 1024;
967 }
968
969 LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
970
971 /* did we assign flash size? */
972 assert(flash_size_in_kb != 0xffff);
973
974 /* calculate numbers of pages */
975 int num_pages = flash_size_in_kb * 1024 / page_size;
976
977 /* check that calculation result makes sense */
978 assert(num_pages > 0);
979
980 if (bank->sectors) {
981 free(bank->sectors);
982 bank->sectors = NULL;
983 }
984
985 bank->base = base_address;
986 bank->size = (num_pages * page_size);
987 bank->num_sectors = num_pages;
988 bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
989
990 for (i = 0; i < num_pages; i++) {
991 bank->sectors[i].offset = i * page_size;
992 bank->sectors[i].size = page_size;
993 bank->sectors[i].is_erased = -1;
994 bank->sectors[i].is_protected = 1;
995 }
996
997 stm32x_info->probed = 1;
998
999 return ERROR_OK;
1000 }
1001
1002 static int stm32x_auto_probe(struct flash_bank *bank)
1003 {
1004 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
1005 if (stm32x_info->probed)
1006 return ERROR_OK;
1007 return stm32x_probe(bank);
1008 }
1009
1010 #if 0
1011 COMMAND_HANDLER(stm32x_handle_part_id_command)
1012 {
1013 return ERROR_OK;
1014 }
1015 #endif
1016
1017 static int get_stm32x_info(struct flash_bank *bank, char *buf, int buf_size)
1018 {
1019 uint32_t dbgmcu_idcode;
1020
1021 /* read stm32 device id register */
1022 int retval = stm32x_get_device_id(bank, &dbgmcu_idcode);
1023 if (retval != ERROR_OK)
1024 return retval;
1025
1026 uint16_t device_id = dbgmcu_idcode & 0xfff;
1027 uint16_t rev_id = dbgmcu_idcode >> 16;
1028 const char *device_str;
1029 const char *rev_str = NULL;
1030
1031 switch (device_id) {
1032 case 0x410:
1033 device_str = "stm32x (Medium Density)";
1034
1035 switch (rev_id) {
1036 case 0x0000:
1037 rev_str = "A";
1038 break;
1039
1040 case 0x2000:
1041 rev_str = "B";
1042 break;
1043
1044 case 0x2001:
1045 rev_str = "Z";
1046 break;
1047
1048 case 0x2003:
1049 rev_str = "Y";
1050 break;
1051 }
1052 break;
1053
1054 case 0x412:
1055 device_str = "stm32x (Low Density)";
1056
1057 switch (rev_id) {
1058 case 0x1000:
1059 rev_str = "A";
1060 break;
1061 }
1062 break;
1063
1064 case 0x414:
1065 device_str = "stm32x (High Density)";
1066
1067 switch (rev_id) {
1068 case 0x1000:
1069 rev_str = "A";
1070 break;
1071
1072 case 0x1001:
1073 rev_str = "Z";
1074 break;
1075 }
1076 break;
1077
1078 case 0x418:
1079 device_str = "stm32x (Connectivity)";
1080
1081 switch (rev_id) {
1082 case 0x1000:
1083 rev_str = "A";
1084 break;
1085
1086 case 0x1001:
1087 rev_str = "Z";
1088 break;
1089 }
1090 break;
1091
1092 case 0x420:
1093 device_str = "stm32x (Value)";
1094
1095 switch (rev_id) {
1096 case 0x1000:
1097 rev_str = "A";
1098 break;
1099
1100 case 0x1001:
1101 rev_str = "Z";
1102 break;
1103 }
1104 break;
1105
1106 case 0x422:
1107 device_str = "stm32f30x";
1108
1109 switch (rev_id) {
1110 case 0x1000:
1111 rev_str = "A";
1112 break;
1113
1114 case 0x1001:
1115 rev_str = "Z";
1116 break;
1117
1118 case 0x2000:
1119 rev_str = "B";
1120 break;
1121 }
1122 break;
1123
1124 case 0x428:
1125 device_str = "stm32x (Value HD)";
1126
1127 switch (rev_id) {
1128 case 0x1000:
1129 rev_str = "A";
1130 break;
1131
1132 case 0x1001:
1133 rev_str = "Z";
1134 break;
1135 }
1136 break;
1137
1138 case 0x430:
1139 device_str = "stm32x (XL)";
1140
1141 switch (rev_id) {
1142 case 0x1000:
1143 rev_str = "A";
1144 break;
1145 }
1146 break;
1147
1148 case 0x432:
1149 device_str = "stm32f37x";
1150
1151 switch (rev_id) {
1152 case 0x1000:
1153 rev_str = "A";
1154 break;
1155
1156 case 0x2000:
1157 rev_str = "B";
1158 break;
1159 }
1160 break;
1161
1162 case 0x440:
1163 case 0x444:
1164 device_str = "stm32f0x";
1165
1166 switch (rev_id) {
1167 case 0x1000:
1168 rev_str = "1.0";
1169 break;
1170
1171 case 0x2000:
1172 rev_str = "2.0";
1173 break;
1174 }
1175 break;
1176
1177 default:
1178 snprintf(buf, buf_size, "Cannot identify target as a stm32x\n");
1179 return ERROR_FAIL;
1180 }
1181
1182 if (rev_str != NULL)
1183 snprintf(buf, buf_size, "%s - Rev: %s", device_str, rev_str);
1184 else
1185 snprintf(buf, buf_size, "%s - Rev: unknown (0x%04x)", device_str, rev_id);
1186
1187 return ERROR_OK;
1188 }
1189
1190 COMMAND_HANDLER(stm32x_handle_lock_command)
1191 {
1192 struct target *target = NULL;
1193 struct stm32x_flash_bank *stm32x_info = NULL;
1194
1195 if (CMD_ARGC < 1)
1196 return ERROR_COMMAND_SYNTAX_ERROR;
1197
1198 struct flash_bank *bank;
1199 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1200 if (ERROR_OK != retval)
1201 return retval;
1202
1203 stm32x_info = bank->driver_priv;
1204
1205 target = bank->target;
1206
1207 if (target->state != TARGET_HALTED) {
1208 LOG_ERROR("Target not halted");
1209 return ERROR_TARGET_NOT_HALTED;
1210 }
1211
1212 retval = stm32x_check_operation_supported(bank);
1213 if (ERROR_OK != retval)
1214 return retval;
1215
1216 if (stm32x_erase_options(bank) != ERROR_OK) {
1217 command_print(CMD_CTX, "stm32x failed to erase options");
1218 return ERROR_OK;
1219 }
1220
1221 /* set readout protection */
1222 stm32x_info->option_bytes.RDP = 0;
1223
1224 if (stm32x_write_options(bank) != ERROR_OK) {
1225 command_print(CMD_CTX, "stm32x failed to lock device");
1226 return ERROR_OK;
1227 }
1228
1229 command_print(CMD_CTX, "stm32x locked");
1230
1231 return ERROR_OK;
1232 }
1233
1234 COMMAND_HANDLER(stm32x_handle_unlock_command)
1235 {
1236 struct target *target = NULL;
1237
1238 if (CMD_ARGC < 1)
1239 return ERROR_COMMAND_SYNTAX_ERROR;
1240
1241 struct flash_bank *bank;
1242 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1243 if (ERROR_OK != retval)
1244 return retval;
1245
1246 target = bank->target;
1247
1248 if (target->state != TARGET_HALTED) {
1249 LOG_ERROR("Target not halted");
1250 return ERROR_TARGET_NOT_HALTED;
1251 }
1252
1253 retval = stm32x_check_operation_supported(bank);
1254 if (ERROR_OK != retval)
1255 return retval;
1256
1257 if (stm32x_erase_options(bank) != ERROR_OK) {
1258 command_print(CMD_CTX, "stm32x failed to unlock device");
1259 return ERROR_OK;
1260 }
1261
1262 if (stm32x_write_options(bank) != ERROR_OK) {
1263 command_print(CMD_CTX, "stm32x failed to lock device");
1264 return ERROR_OK;
1265 }
1266
1267 command_print(CMD_CTX, "stm32x unlocked.\n"
1268 "INFO: a reset or power cycle is required "
1269 "for the new settings to take effect.");
1270
1271 return ERROR_OK;
1272 }
1273
1274 COMMAND_HANDLER(stm32x_handle_options_read_command)
1275 {
1276 uint32_t optionbyte;
1277 struct target *target = NULL;
1278 struct stm32x_flash_bank *stm32x_info = NULL;
1279
1280 if (CMD_ARGC < 1)
1281 return ERROR_COMMAND_SYNTAX_ERROR;
1282
1283 struct flash_bank *bank;
1284 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1285 if (ERROR_OK != retval)
1286 return retval;
1287
1288 stm32x_info = bank->driver_priv;
1289
1290 target = bank->target;
1291
1292 if (target->state != TARGET_HALTED) {
1293 LOG_ERROR("Target not halted");
1294 return ERROR_TARGET_NOT_HALTED;
1295 }
1296
1297 retval = stm32x_check_operation_supported(bank);
1298 if (ERROR_OK != retval)
1299 return retval;
1300
1301 retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optionbyte);
1302 if (retval != ERROR_OK)
1303 return retval;
1304 command_print(CMD_CTX, "Option Byte: 0x%" PRIx32 "", optionbyte);
1305
1306 int user_data = optionbyte;
1307
1308 if (buf_get_u32((uint8_t *)&optionbyte, OPT_ERROR, 1))
1309 command_print(CMD_CTX, "Option Byte Complement Error");
1310
1311 if (buf_get_u32((uint8_t *)&optionbyte, OPT_READOUT, 1))
1312 command_print(CMD_CTX, "Readout Protection On");
1313 else
1314 command_print(CMD_CTX, "Readout Protection Off");
1315
1316 /* user option bytes are offset depending on variant */
1317 optionbyte >>= stm32x_info->option_offset;
1318
1319 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDWDGSW, 1))
1320 command_print(CMD_CTX, "Software Watchdog");
1321 else
1322 command_print(CMD_CTX, "Hardware Watchdog");
1323
1324 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDRSTSTOP, 1))
1325 command_print(CMD_CTX, "Stop: No reset generated");
1326 else
1327 command_print(CMD_CTX, "Stop: Reset generated");
1328
1329 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDRSTSTDBY, 1))
1330 command_print(CMD_CTX, "Standby: No reset generated");
1331 else
1332 command_print(CMD_CTX, "Standby: Reset generated");
1333
1334 if (stm32x_info->has_dual_banks) {
1335 if (buf_get_u32((uint8_t *)&optionbyte, OPT_BFB2, 1))
1336 command_print(CMD_CTX, "Boot: Bank 0");
1337 else
1338 command_print(CMD_CTX, "Boot: Bank 1");
1339 }
1340
1341 command_print(CMD_CTX, "User Option0: 0x%02" PRIx8,
1342 (user_data >> stm32x_info->user_data_offset) & 0xff);
1343 command_print(CMD_CTX, "User Option1: 0x%02" PRIx8,
1344 (user_data >> (stm32x_info->user_data_offset + 8)) & 0xff);
1345
1346 return ERROR_OK;
1347 }
1348
1349 COMMAND_HANDLER(stm32x_handle_options_write_command)
1350 {
1351 struct target *target = NULL;
1352 struct stm32x_flash_bank *stm32x_info = NULL;
1353 uint16_t optionbyte;
1354
1355 if (CMD_ARGC < 2)
1356 return ERROR_COMMAND_SYNTAX_ERROR;
1357
1358 struct flash_bank *bank;
1359 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1360 if (ERROR_OK != retval)
1361 return retval;
1362
1363 stm32x_info = bank->driver_priv;
1364
1365 target = bank->target;
1366
1367 if (target->state != TARGET_HALTED) {
1368 LOG_ERROR("Target not halted");
1369 return ERROR_TARGET_NOT_HALTED;
1370 }
1371
1372 retval = stm32x_check_operation_supported(bank);
1373 if (ERROR_OK != retval)
1374 return retval;
1375
1376 retval = stm32x_read_options(bank);
1377 if (ERROR_OK != retval)
1378 return retval;
1379
1380 /* start with current options */
1381 optionbyte = stm32x_info->option_bytes.user_options;
1382
1383 /* skip over flash bank */
1384 CMD_ARGC--;
1385 CMD_ARGV++;
1386
1387 while (CMD_ARGC) {
1388 if (strcmp("SWWDG", CMD_ARGV[0]) == 0)
1389 optionbyte |= (1 << 0);
1390 else if (strcmp("HWWDG", CMD_ARGV[0]) == 0)
1391 optionbyte &= ~(1 << 0);
1392 else if (strcmp("NORSTSTOP", CMD_ARGV[0]) == 0)
1393 optionbyte &= ~(1 << 1);
1394 else if (strcmp("RSTSTNDBY", CMD_ARGV[0]) == 0)
1395 optionbyte &= ~(1 << 1);
1396 else if (strcmp("NORSTSTNDBY", CMD_ARGV[0]) == 0)
1397 optionbyte &= ~(1 << 2);
1398 else if (strcmp("RSTSTOP", CMD_ARGV[0]) == 0)
1399 optionbyte &= ~(1 << 2);
1400 else if (stm32x_info->has_dual_banks) {
1401 if (strcmp("BOOT0", CMD_ARGV[0]) == 0)
1402 optionbyte |= (1 << 3);
1403 else if (strcmp("BOOT1", CMD_ARGV[0]) == 0)
1404 optionbyte &= ~(1 << 3);
1405 else
1406 return ERROR_COMMAND_SYNTAX_ERROR;
1407 } else
1408 return ERROR_COMMAND_SYNTAX_ERROR;
1409 CMD_ARGC--;
1410 CMD_ARGV++;
1411 }
1412
1413 if (stm32x_erase_options(bank) != ERROR_OK) {
1414 command_print(CMD_CTX, "stm32x failed to erase options");
1415 return ERROR_OK;
1416 }
1417
1418 stm32x_info->option_bytes.user_options = optionbyte;
1419
1420 if (stm32x_write_options(bank) != ERROR_OK) {
1421 command_print(CMD_CTX, "stm32x failed to write options");
1422 return ERROR_OK;
1423 }
1424
1425 command_print(CMD_CTX, "stm32x write options complete.\n"
1426 "INFO: a reset or power cycle is required "
1427 "for the new settings to take effect.");
1428
1429 return ERROR_OK;
1430 }
1431
1432 static int stm32x_mass_erase(struct flash_bank *bank)
1433 {
1434 struct target *target = bank->target;
1435
1436 if (target->state != TARGET_HALTED) {
1437 LOG_ERROR("Target not halted");
1438 return ERROR_TARGET_NOT_HALTED;
1439 }
1440
1441 /* unlock option flash registers */
1442 int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
1443 if (retval != ERROR_OK)
1444 return retval;
1445 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
1446 if (retval != ERROR_OK)
1447 return retval;
1448
1449 /* mass erase flash memory */
1450 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_MER);
1451 if (retval != ERROR_OK)
1452 return retval;
1453 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR),
1454 FLASH_MER | FLASH_STRT);
1455 if (retval != ERROR_OK)
1456 return retval;
1457
1458 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
1459 if (retval != ERROR_OK)
1460 return retval;
1461
1462 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
1463 if (retval != ERROR_OK)
1464 return retval;
1465
1466 return ERROR_OK;
1467 }
1468
1469 COMMAND_HANDLER(stm32x_handle_mass_erase_command)
1470 {
1471 int i;
1472
1473 if (CMD_ARGC < 1)
1474 return ERROR_COMMAND_SYNTAX_ERROR;
1475
1476 struct flash_bank *bank;
1477 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1478 if (ERROR_OK != retval)
1479 return retval;
1480
1481 retval = stm32x_mass_erase(bank);
1482 if (retval == ERROR_OK) {
1483 /* set all sectors as erased */
1484 for (i = 0; i < bank->num_sectors; i++)
1485 bank->sectors[i].is_erased = 1;
1486
1487 command_print(CMD_CTX, "stm32x mass erase complete");
1488 } else
1489 command_print(CMD_CTX, "stm32x mass erase failed");
1490
1491 return retval;
1492 }
1493
1494 static const struct command_registration stm32x_exec_command_handlers[] = {
1495 {
1496 .name = "lock",
1497 .handler = stm32x_handle_lock_command,
1498 .mode = COMMAND_EXEC,
1499 .usage = "bank_id",
1500 .help = "Lock entire flash device.",
1501 },
1502 {
1503 .name = "unlock",
1504 .handler = stm32x_handle_unlock_command,
1505 .mode = COMMAND_EXEC,
1506 .usage = "bank_id",
1507 .help = "Unlock entire protected flash device.",
1508 },
1509 {
1510 .name = "mass_erase",
1511 .handler = stm32x_handle_mass_erase_command,
1512 .mode = COMMAND_EXEC,
1513 .usage = "bank_id",
1514 .help = "Erase entire flash device.",
1515 },
1516 {
1517 .name = "options_read",
1518 .handler = stm32x_handle_options_read_command,
1519 .mode = COMMAND_EXEC,
1520 .usage = "bank_id",
1521 .help = "Read and display device option byte.",
1522 },
1523 {
1524 .name = "options_write",
1525 .handler = stm32x_handle_options_write_command,
1526 .mode = COMMAND_EXEC,
1527 .usage = "bank_id ('SWWDG'|'HWWDG') "
1528 "('RSTSTNDBY'|'NORSTSTNDBY') "
1529 "('RSTSTOP'|'NORSTSTOP')",
1530 .help = "Replace bits in device option byte.",
1531 },
1532 COMMAND_REGISTRATION_DONE
1533 };
1534
1535 static const struct command_registration stm32x_command_handlers[] = {
1536 {
1537 .name = "stm32f1x",
1538 .mode = COMMAND_ANY,
1539 .help = "stm32f1x flash command group",
1540 .usage = "",
1541 .chain = stm32x_exec_command_handlers,
1542 },
1543 COMMAND_REGISTRATION_DONE
1544 };
1545
1546 struct flash_driver stm32f1x_flash = {
1547 .name = "stm32f1x",
1548 .commands = stm32x_command_handlers,
1549 .flash_bank_command = stm32x_flash_bank_command,
1550 .erase = stm32x_erase,
1551 .protect = stm32x_protect,
1552 .write = stm32x_write,
1553 .read = default_flash_read,
1554 .probe = stm32x_probe,
1555 .auto_probe = stm32x_auto_probe,
1556 .erase_check = default_flash_blank_check,
1557 .protect_check = stm32x_protect_check,
1558 .info = get_stm32x_info,
1559 };
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