1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * Copyright (C) 2011 by Andreas Fritiofson *
9 * andreas.fritiofson@gmail.com *
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. *
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. *
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 ***************************************************************************/
32 #include <helper/binarybuffer.h>
33 #include <target/algorithm.h>
34 #include <target/armv7m.h>
36 /* stm32x register locations */
38 #define FLASH_REG_BASE_B0 0x40022000
39 #define FLASH_REG_BASE_B1 0x40022040
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
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
62 /* option byte location */
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
73 /* FLASH_CR register bits */
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)
84 /* FLASH_SR register bits */
86 #define FLASH_BSY (1 << 0)
87 #define FLASH_PGERR (1 << 2)
88 #define FLASH_WRPRTERR (1 << 4)
89 #define FLASH_EOP (1 << 5)
91 /* STM32_FLASH_OBR bit definitions (reading) */
96 #define OPT_RDRSTSTOP 3
97 #define OPT_RDRSTSTDBY 4
98 #define OPT_BFB2 5 /* dual flash bank only */
100 /* register unlock keys */
102 #define KEY1 0x45670123
103 #define KEY2 0xCDEF89AB
107 #define FLASH_WRITE_TIMEOUT 10
108 #define FLASH_ERASE_TIMEOUT 100
110 struct stm32x_options {
112 uint16_t user_options;
114 uint16_t protection[4];
117 struct stm32x_flash_bank {
118 struct stm32x_options option_bytes;
123 /* used to access dual flash bank stm32xl */
124 uint32_t register_base;
125 uint16_t default_rdp;
126 int user_data_offset;
128 uint32_t user_bank_size;
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);
136 /* flash bank stm32x <base> <size> 0 0 <target#>
138 FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
140 struct stm32x_flash_bank *stm32x_info;
143 return ERROR_COMMAND_SYNTAX_ERROR;
145 stm32x_info = malloc(sizeof(struct stm32x_flash_bank));
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;
156 static inline int stm32x_get_flash_reg(struct flash_bank *bank, uint32_t reg)
158 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
159 return reg + stm32x_info->register_base;
162 static inline int stm32x_get_flash_status(struct flash_bank *bank, uint32_t *status)
164 struct target *target = bank->target;
165 return target_read_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), status);
168 static int stm32x_wait_status_busy(struct flash_bank *bank, int timeout)
170 struct target *target = bank->target;
172 int retval = ERROR_OK;
174 /* wait for busy to clear */
176 retval = stm32x_get_flash_status(bank, &status);
177 if (retval != ERROR_OK)
179 LOG_DEBUG("status: 0x%" PRIx32 "", status);
180 if ((status & FLASH_BSY) == 0)
182 if (timeout-- <= 0) {
183 LOG_ERROR("timed out waiting for flash");
189 if (status & FLASH_WRPRTERR) {
190 LOG_ERROR("stm32x device protected");
194 if (status & FLASH_PGERR) {
195 LOG_ERROR("stm32x device programming failed");
199 /* Clear but report errors */
200 if (status & (FLASH_WRPRTERR | FLASH_PGERR)) {
201 /* If this operation fails, we ignore it and report the original
204 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR),
205 FLASH_WRPRTERR | FLASH_PGERR);
210 static int stm32x_check_operation_supported(struct flash_bank *bank)
212 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
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;
224 static int stm32x_read_options(struct flash_bank *bank)
227 struct stm32x_flash_bank *stm32x_info = NULL;
228 struct target *target = bank->target;
230 stm32x_info = bank->driver_priv;
232 /* read current option bytes */
233 int retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optiondata);
234 if (retval != ERROR_OK)
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;
241 if (optiondata & (1 << OPT_READOUT))
242 LOG_INFO("Device Security Bit Set");
244 /* each bit refers to a 4bank protection */
245 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &optiondata);
246 if (retval != ERROR_OK)
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);
257 static int stm32x_erase_options(struct flash_bank *bank)
259 struct stm32x_flash_bank *stm32x_info = NULL;
260 struct target *target = bank->target;
262 stm32x_info = bank->driver_priv;
264 /* read current options */
265 stm32x_read_options(bank);
267 /* unlock flash registers */
268 int retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY1);
269 if (retval != ERROR_OK)
272 retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY2);
273 if (retval != ERROR_OK)
276 /* unlock option flash registers */
277 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY1);
278 if (retval != ERROR_OK)
280 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY2);
281 if (retval != ERROR_OK)
284 /* erase option bytes */
285 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTER | FLASH_OPTWRE);
286 if (retval != ERROR_OK)
288 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTER | FLASH_STRT | FLASH_OPTWRE);
289 if (retval != ERROR_OK)
292 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
293 if (retval != ERROR_OK)
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;
303 static int stm32x_write_options(struct flash_bank *bank)
305 struct stm32x_flash_bank *stm32x_info = NULL;
306 struct target *target = bank->target;
308 stm32x_info = bank->driver_priv;
310 /* unlock flash registers */
311 int retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY1);
312 if (retval != ERROR_OK)
314 retval = target_write_u32(target, STM32_FLASH_KEYR_B0, KEY2);
315 if (retval != ERROR_OK)
318 /* unlock option flash registers */
319 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY1);
320 if (retval != ERROR_OK)
322 retval = target_write_u32(target, STM32_FLASH_OPTKEYR_B0, KEY2);
323 if (retval != ERROR_OK)
326 /* program option bytes */
327 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_OPTPG | FLASH_OPTWRE);
328 if (retval != ERROR_OK)
331 uint8_t opt_bytes[16];
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]);
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");
350 retval = target_write_u32(target, STM32_FLASH_CR_B0, FLASH_LOCK);
351 if (retval != ERROR_OK)
357 static int stm32x_protect_check(struct flash_bank *bank)
359 struct target *target = bank->target;
360 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
367 if (target->state != TARGET_HALTED) {
368 LOG_ERROR("Target not halted");
369 return ERROR_TARGET_NOT_HALTED;
372 int retval = stm32x_check_operation_supported(bank);
373 if (ERROR_OK != retval)
376 /* medium density - each bit refers to a 4bank protection
377 * high density - each bit refers to a 2bank protection */
378 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection);
379 if (retval != ERROR_OK)
382 /* medium density - each protection bit is for 4 * 1K pages
383 * high density - each protection bit is for 2 * 2K pages */
384 num_bits = (bank->num_sectors / stm32x_info->ppage_size);
386 if (stm32x_info->ppage_size == 2) {
387 /* high density flash/connectivity line protection */
391 if (protection & (1 << 31))
394 /* bit 31 controls sector 62 - 255 protection for high density
395 * bit 31 controls sector 62 - 127 protection for connectivity line */
396 for (s = 62; s < bank->num_sectors; s++)
397 bank->sectors[s].is_protected = set;
399 if (bank->num_sectors > 61)
402 for (i = 0; i < num_bits; i++) {
405 if (protection & (1 << i))
408 for (s = 0; s < stm32x_info->ppage_size; s++)
409 bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set;
412 /* low/medium density flash protection */
413 for (i = 0; i < num_bits; i++) {
416 if (protection & (1 << i))
419 for (s = 0; s < stm32x_info->ppage_size; s++)
420 bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set;
427 static int stm32x_erase(struct flash_bank *bank, int first, int last)
429 struct target *target = bank->target;
432 if (bank->target->state != TARGET_HALTED) {
433 LOG_ERROR("Target not halted");
434 return ERROR_TARGET_NOT_HALTED;
437 if ((first == 0) && (last == (bank->num_sectors - 1)))
438 return stm32x_mass_erase(bank);
440 /* unlock flash registers */
441 int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
442 if (retval != ERROR_OK)
444 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
445 if (retval != ERROR_OK)
448 for (i = first; i <= last; i++) {
449 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER);
450 if (retval != ERROR_OK)
452 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_AR),
453 bank->base + bank->sectors[i].offset);
454 if (retval != ERROR_OK)
456 retval = target_write_u32(target,
457 stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER | FLASH_STRT);
458 if (retval != ERROR_OK)
461 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
462 if (retval != ERROR_OK)
465 bank->sectors[i].is_erased = 1;
468 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
469 if (retval != ERROR_OK)
475 static int stm32x_protect(struct flash_bank *bank, int set, int first, int last)
477 struct stm32x_flash_bank *stm32x_info = NULL;
478 struct target *target = bank->target;
479 uint16_t prot_reg[4] = {0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF};
484 stm32x_info = bank->driver_priv;
486 if (target->state != TARGET_HALTED) {
487 LOG_ERROR("Target not halted");
488 return ERROR_TARGET_NOT_HALTED;
491 int retval = stm32x_check_operation_supported(bank);
492 if (ERROR_OK != retval)
495 if ((first % stm32x_info->ppage_size) != 0) {
496 LOG_WARNING("aligned start protect sector to a %d sector boundary",
497 stm32x_info->ppage_size);
498 first = first - (first % stm32x_info->ppage_size);
500 if (((last + 1) % stm32x_info->ppage_size) != 0) {
501 LOG_WARNING("aligned end protect sector to a %d sector boundary",
502 stm32x_info->ppage_size);
504 last = last - (last % stm32x_info->ppage_size);
508 /* medium density - each bit refers to a 4bank protection
509 * high density - each bit refers to a 2bank protection */
510 retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection);
511 if (retval != ERROR_OK)
514 prot_reg[0] = (uint16_t)protection;
515 prot_reg[1] = (uint16_t)(protection >> 8);
516 prot_reg[2] = (uint16_t)(protection >> 16);
517 prot_reg[3] = (uint16_t)(protection >> 24);
519 if (stm32x_info->ppage_size == 2) {
520 /* high density flash */
522 /* bit 7 controls sector 62 - 255 protection */
525 prot_reg[3] &= ~(1 << 7);
527 prot_reg[3] |= (1 << 7);
535 for (i = first; i <= last; i++) {
536 reg = (i / stm32x_info->ppage_size) / 8;
537 bit = (i / stm32x_info->ppage_size) - (reg * 8);
540 prot_reg[reg] &= ~(1 << bit);
542 prot_reg[reg] |= (1 << bit);
545 /* medium density flash */
546 for (i = first; i <= last; i++) {
547 reg = (i / stm32x_info->ppage_size) / 8;
548 bit = (i / stm32x_info->ppage_size) - (reg * 8);
551 prot_reg[reg] &= ~(1 << bit);
553 prot_reg[reg] |= (1 << bit);
557 status = stm32x_erase_options(bank);
558 if (status != ERROR_OK)
561 stm32x_info->option_bytes.protection[0] = prot_reg[0];
562 stm32x_info->option_bytes.protection[1] = prot_reg[1];
563 stm32x_info->option_bytes.protection[2] = prot_reg[2];
564 stm32x_info->option_bytes.protection[3] = prot_reg[3];
566 return stm32x_write_options(bank);
569 static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
570 uint32_t offset, uint32_t count)
572 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
573 struct target *target = bank->target;
574 uint32_t buffer_size = 16384;
575 struct working_area *write_algorithm;
576 struct working_area *source;
577 uint32_t address = bank->base + offset;
578 struct reg_param reg_params[5];
579 struct armv7m_algorithm armv7m_info;
580 int retval = ERROR_OK;
582 /* see contrib/loaders/flash/stm32f1x.S for src */
584 static const uint8_t stm32x_flash_write_code[] = {
585 /* #define STM32_FLASH_SR_OFFSET 0x0C */
587 0x16, 0x68, /* ldr r6, [r2, #0] */
588 0x00, 0x2e, /* cmp r6, #0 */
589 0x18, 0xd0, /* beq exit */
590 0x55, 0x68, /* ldr r5, [r2, #4] */
591 0xb5, 0x42, /* cmp r5, r6 */
592 0xf9, 0xd0, /* beq wait_fifo */
593 0x2e, 0x88, /* ldrh r6, [r5, #0] */
594 0x26, 0x80, /* strh r6, [r4, #0] */
595 0x02, 0x35, /* adds r5, #2 */
596 0x02, 0x34, /* adds r4, #2 */
598 0xc6, 0x68, /* ldr r6, [r0, #STM32_FLASH_SR_OFFSET] */
599 0x01, 0x27, /* movs r7, #1 */
600 0x3e, 0x42, /* tst r6, r7 */
601 0xfb, 0xd1, /* bne busy */
602 0x14, 0x27, /* movs r7, #0x14 */
603 0x3e, 0x42, /* tst r6, r7 */
604 0x08, 0xd1, /* bne error */
605 0x9d, 0x42, /* cmp r5, r3 */
606 0x01, 0xd3, /* bcc no_wrap */
607 0x15, 0x46, /* mov r5, r2 */
608 0x08, 0x35, /* adds r5, #8 */
610 0x55, 0x60, /* str r5, [r2, #4] */
611 0x01, 0x39, /* subs r1, r1, #1 */
612 0x00, 0x29, /* cmp r1, #0 */
613 0x02, 0xd0, /* beq exit */
614 0xe5, 0xe7, /* b wait_fifo */
616 0x00, 0x20, /* movs r0, #0 */
617 0x50, 0x60, /* str r0, [r2, #4] */
619 0x30, 0x46, /* mov r0, r6 */
620 0x00, 0xbe, /* bkpt #0 */
623 /* flash write code */
624 if (target_alloc_working_area(target, sizeof(stm32x_flash_write_code),
625 &write_algorithm) != ERROR_OK) {
626 LOG_WARNING("no working area available, can't do block memory writes");
627 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
630 retval = target_write_buffer(target, write_algorithm->address,
631 sizeof(stm32x_flash_write_code), (uint8_t *)stm32x_flash_write_code);
632 if (retval != ERROR_OK)
636 while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
638 buffer_size &= ~3UL; /* Make sure it's 4 byte aligned */
639 if (buffer_size <= 256) {
640 /* we already allocated the writing code, but failed to get a
641 * buffer, free the algorithm */
642 target_free_working_area(target, write_algorithm);
644 LOG_WARNING("no large enough working area available, can't do block memory writes");
645 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
649 init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT); /* flash base (in), status (out) */
650 init_reg_param(®_params[1], "r1", 32, PARAM_OUT); /* count (halfword-16bit) */
651 init_reg_param(®_params[2], "r2", 32, PARAM_OUT); /* buffer start */
652 init_reg_param(®_params[3], "r3", 32, PARAM_OUT); /* buffer end */
653 init_reg_param(®_params[4], "r4", 32, PARAM_IN_OUT); /* target address */
655 buf_set_u32(reg_params[0].value, 0, 32, stm32x_info->register_base);
656 buf_set_u32(reg_params[1].value, 0, 32, count);
657 buf_set_u32(reg_params[2].value, 0, 32, source->address);
658 buf_set_u32(reg_params[3].value, 0, 32, source->address + source->size);
659 buf_set_u32(reg_params[4].value, 0, 32, address);
661 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
662 armv7m_info.core_mode = ARM_MODE_THREAD;
664 retval = target_run_flash_async_algorithm(target, buffer, count, 2,
667 source->address, source->size,
668 write_algorithm->address, 0,
671 if (retval == ERROR_FLASH_OPERATION_FAILED) {
672 LOG_ERROR("flash write failed at address 0x%"PRIx32,
673 buf_get_u32(reg_params[4].value, 0, 32));
675 if (buf_get_u32(reg_params[0].value, 0, 32) & FLASH_PGERR) {
676 LOG_ERROR("flash memory not erased before writing");
677 /* Clear but report errors */
678 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), FLASH_PGERR);
681 if (buf_get_u32(reg_params[0].value, 0, 32) & FLASH_WRPRTERR) {
682 LOG_ERROR("flash memory write protected");
683 /* Clear but report errors */
684 target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), FLASH_WRPRTERR);
688 target_free_working_area(target, source);
689 target_free_working_area(target, write_algorithm);
691 destroy_reg_param(®_params[0]);
692 destroy_reg_param(®_params[1]);
693 destroy_reg_param(®_params[2]);
694 destroy_reg_param(®_params[3]);
695 destroy_reg_param(®_params[4]);
700 static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
701 uint32_t offset, uint32_t count)
703 struct target *target = bank->target;
704 uint8_t *new_buffer = NULL;
706 if (bank->target->state != TARGET_HALTED) {
707 LOG_ERROR("Target not halted");
708 return ERROR_TARGET_NOT_HALTED;
712 LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
713 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
716 /* If there's an odd number of bytes, the data has to be padded. Duplicate
717 * the buffer and use the normal code path with a single block write since
718 * it's probably cheaper than to special case the last odd write using
719 * discrete accesses. */
721 new_buffer = malloc(count + 1);
722 if (new_buffer == NULL) {
723 LOG_ERROR("odd number of bytes to write and no memory for padding buffer");
726 LOG_INFO("odd number of bytes to write, padding with 0xff");
727 buffer = memcpy(new_buffer, buffer, count);
728 buffer[count++] = 0xff;
731 uint32_t words_remaining = count / 2;
734 /* unlock flash registers */
735 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
736 if (retval != ERROR_OK)
738 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
739 if (retval != ERROR_OK)
742 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PG);
743 if (retval != ERROR_OK)
746 /* try using a block write */
747 retval = stm32x_write_block(bank, buffer, offset, words_remaining);
749 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
750 /* if block write failed (no sufficient working area),
751 * we use normal (slow) single halfword accesses */
752 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
754 while (words_remaining > 0) {
756 memcpy(&value, buffer, sizeof(uint16_t));
758 retval = target_write_u16(target, bank->base + offset, value);
759 if (retval != ERROR_OK)
760 goto reset_pg_and_lock;
762 retval = stm32x_wait_status_busy(bank, 5);
763 if (retval != ERROR_OK)
764 goto reset_pg_and_lock;
773 retval2 = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
774 if (retval == ERROR_OK)
784 static int stm32x_get_device_id(struct flash_bank *bank, uint32_t *device_id)
786 /* This check the device CPUID core register to detect
787 * the M0 from the M3 devices. */
789 struct target *target = bank->target;
790 uint32_t cpuid, device_id_register = 0;
792 /* Get the CPUID from the ARM Core
793 * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0432c/DDI0432C_cortex_m0_r0p0_trm.pdf 4.2.1 */
794 int retval = target_read_u32(target, 0xE000ED00, &cpuid);
795 if (retval != ERROR_OK)
798 if (((cpuid >> 4) & 0xFFF) == 0xC20) {
799 /* 0xC20 is M0 devices */
800 device_id_register = 0x40015800;
801 } else if (((cpuid >> 4) & 0xFFF) == 0xC23) {
802 /* 0xC23 is M3 devices */
803 device_id_register = 0xE0042000;
804 } else if (((cpuid >> 4) & 0xFFF) == 0xC24) {
805 /* 0xC24 is M4 devices */
806 device_id_register = 0xE0042000;
808 LOG_ERROR("Cannot identify target as a stm32x");
812 /* read stm32 device id register */
813 retval = target_read_u32(target, device_id_register, device_id);
814 if (retval != ERROR_OK)
820 static int stm32x_get_flash_size(struct flash_bank *bank, uint16_t *flash_size_in_kb)
822 struct target *target = bank->target;
823 uint32_t cpuid, flash_size_reg;
825 int retval = target_read_u32(target, 0xE000ED00, &cpuid);
826 if (retval != ERROR_OK)
829 if (((cpuid >> 4) & 0xFFF) == 0xC20) {
830 /* 0xC20 is M0 devices */
831 flash_size_reg = 0x1FFFF7CC;
832 } else if (((cpuid >> 4) & 0xFFF) == 0xC23) {
833 /* 0xC23 is M3 devices */
834 flash_size_reg = 0x1FFFF7E0;
835 } else if (((cpuid >> 4) & 0xFFF) == 0xC24) {
836 /* 0xC24 is M4 devices */
837 flash_size_reg = 0x1FFFF7CC;
839 LOG_ERROR("Cannot identify target as a stm32x");
843 retval = target_read_u16(target, flash_size_reg, flash_size_in_kb);
844 if (retval != ERROR_OK)
850 static int stm32x_probe(struct flash_bank *bank)
852 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
854 uint16_t flash_size_in_kb;
855 uint16_t max_flash_size_in_kb;
858 uint32_t base_address = 0x08000000;
860 stm32x_info->probed = 0;
861 stm32x_info->register_base = FLASH_REG_BASE_B0;
862 stm32x_info->user_data_offset = 10;
863 stm32x_info->option_offset = 0;
865 /* default factory protection level */
866 stm32x_info->default_rdp = 0x5AA5;
868 /* read stm32 device id register */
869 int retval = stm32x_get_device_id(bank, &device_id);
870 if (retval != ERROR_OK)
873 LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
875 /* set page size, protection granularity and max flash size depending on family */
876 switch (device_id & 0xfff) {
877 case 0x410: /* medium density */
879 stm32x_info->ppage_size = 4;
880 max_flash_size_in_kb = 128;
882 case 0x412: /* low density */
884 stm32x_info->ppage_size = 4;
885 max_flash_size_in_kb = 32;
887 case 0x414: /* high density */
889 stm32x_info->ppage_size = 2;
890 max_flash_size_in_kb = 512;
892 case 0x418: /* connectivity line density */
894 stm32x_info->ppage_size = 2;
895 max_flash_size_in_kb = 256;
897 case 0x420: /* value line density */
899 stm32x_info->ppage_size = 4;
900 max_flash_size_in_kb = 128;
902 case 0x422: /* stm32f30x */
904 stm32x_info->ppage_size = 2;
905 max_flash_size_in_kb = 256;
906 stm32x_info->user_data_offset = 16;
907 stm32x_info->option_offset = 6;
908 stm32x_info->default_rdp = 0x55AA;
910 case 0x428: /* value line High density */
912 stm32x_info->ppage_size = 4;
913 max_flash_size_in_kb = 128;
915 case 0x430: /* xl line density (dual flash banks) */
917 stm32x_info->ppage_size = 2;
918 max_flash_size_in_kb = 1024;
919 stm32x_info->has_dual_banks = true;
921 case 0x432: /* stm32f37x */
923 stm32x_info->ppage_size = 2;
924 max_flash_size_in_kb = 256;
925 stm32x_info->user_data_offset = 16;
926 stm32x_info->option_offset = 6;
927 stm32x_info->default_rdp = 0x55AA;
929 case 0x440: /* stm32f0x */
931 stm32x_info->ppage_size = 4;
932 max_flash_size_in_kb = 64;
933 stm32x_info->user_data_offset = 16;
934 stm32x_info->option_offset = 6;
935 stm32x_info->default_rdp = 0x55AA;
938 LOG_WARNING("Cannot identify target as a STM32 family.");
942 /* get flash size from target. */
943 retval = stm32x_get_flash_size(bank, &flash_size_in_kb);
945 /* failed reading flash size or flash size invalid (early silicon),
946 * default to max target family */
947 if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
948 LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
949 max_flash_size_in_kb);
950 flash_size_in_kb = max_flash_size_in_kb;
953 if (stm32x_info->has_dual_banks) {
954 /* split reported size into matching bank */
955 if (bank->base != 0x08080000) {
956 /* bank 0 will be fixed 512k */
957 flash_size_in_kb = 512;
959 flash_size_in_kb -= 512;
960 /* bank1 also uses a register offset */
961 stm32x_info->register_base = FLASH_REG_BASE_B1;
962 base_address = 0x08080000;
966 /* if the user sets the size manually then ignore the probed value
967 * this allows us to work around devices that have a invalid flash size register value */
968 if (stm32x_info->user_bank_size) {
969 LOG_INFO("ignoring flash probed value, using configured bank size");
970 flash_size_in_kb = stm32x_info->user_bank_size / 1024;
973 LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
975 /* did we assign flash size? */
976 assert(flash_size_in_kb != 0xffff);
978 /* calculate numbers of pages */
979 int num_pages = flash_size_in_kb * 1024 / page_size;
981 /* check that calculation result makes sense */
982 assert(num_pages > 0);
986 bank->sectors = NULL;
989 bank->base = base_address;
990 bank->size = (num_pages * page_size);
991 bank->num_sectors = num_pages;
992 bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
994 for (i = 0; i < num_pages; i++) {
995 bank->sectors[i].offset = i * page_size;
996 bank->sectors[i].size = page_size;
997 bank->sectors[i].is_erased = -1;
998 bank->sectors[i].is_protected = 1;
1001 stm32x_info->probed = 1;
1006 static int stm32x_auto_probe(struct flash_bank *bank)
1008 struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
1009 if (stm32x_info->probed)
1011 return stm32x_probe(bank);
1015 COMMAND_HANDLER(stm32x_handle_part_id_command)
1021 static int get_stm32x_info(struct flash_bank *bank, char *buf, int buf_size)
1026 /* read stm32 device id register */
1027 int retval = stm32x_get_device_id(bank, &device_id);
1028 if (retval != ERROR_OK)
1031 if ((device_id & 0xfff) == 0x410) {
1032 printed = snprintf(buf, buf_size, "stm32x (Medium Density) - Rev: ");
1034 buf_size -= printed;
1036 switch (device_id >> 16) {
1038 snprintf(buf, buf_size, "A");
1042 snprintf(buf, buf_size, "B");
1046 snprintf(buf, buf_size, "Z");
1050 snprintf(buf, buf_size, "Y");
1054 snprintf(buf, buf_size, "unknown");
1057 } else if ((device_id & 0xfff) == 0x412) {
1058 printed = snprintf(buf, buf_size, "stm32x (Low Density) - Rev: ");
1060 buf_size -= printed;
1062 switch (device_id >> 16) {
1064 snprintf(buf, buf_size, "A");
1068 snprintf(buf, buf_size, "unknown");
1071 } else if ((device_id & 0xfff) == 0x414) {
1072 printed = snprintf(buf, buf_size, "stm32x (High Density) - Rev: ");
1074 buf_size -= printed;
1076 switch (device_id >> 16) {
1078 snprintf(buf, buf_size, "A");
1082 snprintf(buf, buf_size, "Z");
1086 snprintf(buf, buf_size, "unknown");
1089 } else if ((device_id & 0xfff) == 0x418) {
1090 printed = snprintf(buf, buf_size, "stm32x (Connectivity) - Rev: ");
1092 buf_size -= printed;
1094 switch (device_id >> 16) {
1096 snprintf(buf, buf_size, "A");
1100 snprintf(buf, buf_size, "Z");
1104 snprintf(buf, buf_size, "unknown");
1107 } else if ((device_id & 0xfff) == 0x420) {
1108 printed = snprintf(buf, buf_size, "stm32x (Value) - Rev: ");
1110 buf_size -= printed;
1112 switch (device_id >> 16) {
1114 snprintf(buf, buf_size, "A");
1118 snprintf(buf, buf_size, "Z");
1122 snprintf(buf, buf_size, "unknown");
1125 } else if ((device_id & 0xfff) == 0x422) {
1126 printed = snprintf(buf, buf_size, "stm32f30x - Rev: ");
1128 buf_size -= printed;
1130 switch (device_id >> 16) {
1132 snprintf(buf, buf_size, "A");
1136 snprintf(buf, buf_size, "Z");
1140 snprintf(buf, buf_size, "B");
1144 snprintf(buf, buf_size, "unknown");
1147 } else if ((device_id & 0xfff) == 0x428) {
1148 printed = snprintf(buf, buf_size, "stm32x (Value HD) - Rev: ");
1150 buf_size -= printed;
1152 switch (device_id >> 16) {
1154 snprintf(buf, buf_size, "A");
1158 snprintf(buf, buf_size, "Z");
1162 snprintf(buf, buf_size, "unknown");
1165 } else if ((device_id & 0xfff) == 0x430) {
1166 printed = snprintf(buf, buf_size, "stm32x (XL) - Rev: ");
1168 buf_size -= printed;
1170 switch (device_id >> 16) {
1172 snprintf(buf, buf_size, "A");
1176 snprintf(buf, buf_size, "unknown");
1179 } else if ((device_id & 0xfff) == 0x432) {
1180 printed = snprintf(buf, buf_size, "stm32f37x - Rev: ");
1182 buf_size -= printed;
1184 switch (device_id >> 16) {
1186 snprintf(buf, buf_size, "A");
1190 snprintf(buf, buf_size, "B");
1194 snprintf(buf, buf_size, "unknown");
1197 } else if ((device_id & 0xfff) == 0x440) {
1198 printed = snprintf(buf, buf_size, "stm32f0x - Rev: ");
1200 buf_size -= printed;
1202 switch (device_id >> 16) {
1204 snprintf(buf, buf_size, "1.0");
1208 snprintf(buf, buf_size, "2.0");
1212 snprintf(buf, buf_size, "unknown");
1216 snprintf(buf, buf_size, "Cannot identify target as a stm32x\n");
1223 COMMAND_HANDLER(stm32x_handle_lock_command)
1225 struct target *target = NULL;
1226 struct stm32x_flash_bank *stm32x_info = NULL;
1229 return ERROR_COMMAND_SYNTAX_ERROR;
1231 struct flash_bank *bank;
1232 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1233 if (ERROR_OK != retval)
1236 stm32x_info = bank->driver_priv;
1238 target = bank->target;
1240 if (target->state != TARGET_HALTED) {
1241 LOG_ERROR("Target not halted");
1242 return ERROR_TARGET_NOT_HALTED;
1245 retval = stm32x_check_operation_supported(bank);
1246 if (ERROR_OK != retval)
1249 if (stm32x_erase_options(bank) != ERROR_OK) {
1250 command_print(CMD_CTX, "stm32x failed to erase options");
1254 /* set readout protection */
1255 stm32x_info->option_bytes.RDP = 0;
1257 if (stm32x_write_options(bank) != ERROR_OK) {
1258 command_print(CMD_CTX, "stm32x failed to lock device");
1262 command_print(CMD_CTX, "stm32x locked");
1267 COMMAND_HANDLER(stm32x_handle_unlock_command)
1269 struct target *target = NULL;
1272 return ERROR_COMMAND_SYNTAX_ERROR;
1274 struct flash_bank *bank;
1275 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1276 if (ERROR_OK != retval)
1279 target = bank->target;
1281 if (target->state != TARGET_HALTED) {
1282 LOG_ERROR("Target not halted");
1283 return ERROR_TARGET_NOT_HALTED;
1286 retval = stm32x_check_operation_supported(bank);
1287 if (ERROR_OK != retval)
1290 if (stm32x_erase_options(bank) != ERROR_OK) {
1291 command_print(CMD_CTX, "stm32x failed to unlock device");
1295 if (stm32x_write_options(bank) != ERROR_OK) {
1296 command_print(CMD_CTX, "stm32x failed to lock device");
1300 command_print(CMD_CTX, "stm32x unlocked.\n"
1301 "INFO: a reset or power cycle is required "
1302 "for the new settings to take effect.");
1307 COMMAND_HANDLER(stm32x_handle_options_read_command)
1309 uint32_t optionbyte;
1310 struct target *target = NULL;
1311 struct stm32x_flash_bank *stm32x_info = NULL;
1314 return ERROR_COMMAND_SYNTAX_ERROR;
1316 struct flash_bank *bank;
1317 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1318 if (ERROR_OK != retval)
1321 stm32x_info = bank->driver_priv;
1323 target = bank->target;
1325 if (target->state != TARGET_HALTED) {
1326 LOG_ERROR("Target not halted");
1327 return ERROR_TARGET_NOT_HALTED;
1330 retval = stm32x_check_operation_supported(bank);
1331 if (ERROR_OK != retval)
1334 retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optionbyte);
1335 if (retval != ERROR_OK)
1337 command_print(CMD_CTX, "Option Byte: 0x%" PRIx32 "", optionbyte);
1339 int user_data = optionbyte;
1341 if (buf_get_u32((uint8_t *)&optionbyte, OPT_ERROR, 1))
1342 command_print(CMD_CTX, "Option Byte Complement Error");
1344 if (buf_get_u32((uint8_t *)&optionbyte, OPT_READOUT, 1))
1345 command_print(CMD_CTX, "Readout Protection On");
1347 command_print(CMD_CTX, "Readout Protection Off");
1349 /* user option bytes are offset depending on variant */
1350 optionbyte >>= stm32x_info->option_offset;
1352 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDWDGSW, 1))
1353 command_print(CMD_CTX, "Software Watchdog");
1355 command_print(CMD_CTX, "Hardware Watchdog");
1357 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDRSTSTOP, 1))
1358 command_print(CMD_CTX, "Stop: No reset generated");
1360 command_print(CMD_CTX, "Stop: Reset generated");
1362 if (buf_get_u32((uint8_t *)&optionbyte, OPT_RDRSTSTDBY, 1))
1363 command_print(CMD_CTX, "Standby: No reset generated");
1365 command_print(CMD_CTX, "Standby: Reset generated");
1367 if (stm32x_info->has_dual_banks) {
1368 if (buf_get_u32((uint8_t *)&optionbyte, OPT_BFB2, 1))
1369 command_print(CMD_CTX, "Boot: Bank 0");
1371 command_print(CMD_CTX, "Boot: Bank 1");
1374 command_print(CMD_CTX, "User Option0: 0x%02" PRIx8,
1375 (user_data >> stm32x_info->user_data_offset) & 0xff);
1376 command_print(CMD_CTX, "User Option1: 0x%02" PRIx8,
1377 (user_data >> (stm32x_info->user_data_offset + 8)) & 0xff);
1382 COMMAND_HANDLER(stm32x_handle_options_write_command)
1384 struct target *target = NULL;
1385 struct stm32x_flash_bank *stm32x_info = NULL;
1386 uint16_t optionbyte;
1389 return ERROR_COMMAND_SYNTAX_ERROR;
1391 struct flash_bank *bank;
1392 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1393 if (ERROR_OK != retval)
1396 stm32x_info = bank->driver_priv;
1398 target = bank->target;
1400 if (target->state != TARGET_HALTED) {
1401 LOG_ERROR("Target not halted");
1402 return ERROR_TARGET_NOT_HALTED;
1405 retval = stm32x_check_operation_supported(bank);
1406 if (ERROR_OK != retval)
1409 retval = stm32x_read_options(bank);
1410 if (ERROR_OK != retval)
1413 /* start with current options */
1414 optionbyte = stm32x_info->option_bytes.user_options;
1416 /* skip over flash bank */
1421 if (strcmp("SWWDG", CMD_ARGV[0]) == 0)
1422 optionbyte |= (1 << 0);
1423 else if (strcmp("HWWDG", CMD_ARGV[0]) == 0)
1424 optionbyte &= ~(1 << 0);
1425 else if (strcmp("NORSTSTOP", CMD_ARGV[0]) == 0)
1426 optionbyte &= ~(1 << 1);
1427 else if (strcmp("RSTSTNDBY", CMD_ARGV[0]) == 0)
1428 optionbyte &= ~(1 << 1);
1429 else if (strcmp("NORSTSTNDBY", CMD_ARGV[0]) == 0)
1430 optionbyte &= ~(1 << 2);
1431 else if (strcmp("RSTSTOP", CMD_ARGV[0]) == 0)
1432 optionbyte &= ~(1 << 2);
1433 else if (stm32x_info->has_dual_banks) {
1434 if (strcmp("BOOT0", CMD_ARGV[0]) == 0)
1435 optionbyte |= (1 << 3);
1436 else if (strcmp("BOOT1", CMD_ARGV[0]) == 0)
1437 optionbyte &= ~(1 << 3);
1439 return ERROR_COMMAND_SYNTAX_ERROR;
1441 return ERROR_COMMAND_SYNTAX_ERROR;
1446 if (stm32x_erase_options(bank) != ERROR_OK) {
1447 command_print(CMD_CTX, "stm32x failed to erase options");
1451 stm32x_info->option_bytes.user_options = optionbyte;
1453 if (stm32x_write_options(bank) != ERROR_OK) {
1454 command_print(CMD_CTX, "stm32x failed to write options");
1458 command_print(CMD_CTX, "stm32x write options complete.\n"
1459 "INFO: a reset or power cycle is required "
1460 "for the new settings to take effect.");
1465 static int stm32x_mass_erase(struct flash_bank *bank)
1467 struct target *target = bank->target;
1469 if (target->state != TARGET_HALTED) {
1470 LOG_ERROR("Target not halted");
1471 return ERROR_TARGET_NOT_HALTED;
1474 /* unlock option flash registers */
1475 int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
1476 if (retval != ERROR_OK)
1478 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
1479 if (retval != ERROR_OK)
1482 /* mass erase flash memory */
1483 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_MER);
1484 if (retval != ERROR_OK)
1486 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR),
1487 FLASH_MER | FLASH_STRT);
1488 if (retval != ERROR_OK)
1491 retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
1492 if (retval != ERROR_OK)
1495 retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
1496 if (retval != ERROR_OK)
1502 COMMAND_HANDLER(stm32x_handle_mass_erase_command)
1507 return ERROR_COMMAND_SYNTAX_ERROR;
1509 struct flash_bank *bank;
1510 int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1511 if (ERROR_OK != retval)
1514 retval = stm32x_mass_erase(bank);
1515 if (retval == ERROR_OK) {
1516 /* set all sectors as erased */
1517 for (i = 0; i < bank->num_sectors; i++)
1518 bank->sectors[i].is_erased = 1;
1520 command_print(CMD_CTX, "stm32x mass erase complete");
1522 command_print(CMD_CTX, "stm32x mass erase failed");
1527 static const struct command_registration stm32x_exec_command_handlers[] = {
1530 .handler = stm32x_handle_lock_command,
1531 .mode = COMMAND_EXEC,
1533 .help = "Lock entire flash device.",
1537 .handler = stm32x_handle_unlock_command,
1538 .mode = COMMAND_EXEC,
1540 .help = "Unlock entire protected flash device.",
1543 .name = "mass_erase",
1544 .handler = stm32x_handle_mass_erase_command,
1545 .mode = COMMAND_EXEC,
1547 .help = "Erase entire flash device.",
1550 .name = "options_read",
1551 .handler = stm32x_handle_options_read_command,
1552 .mode = COMMAND_EXEC,
1554 .help = "Read and display device option byte.",
1557 .name = "options_write",
1558 .handler = stm32x_handle_options_write_command,
1559 .mode = COMMAND_EXEC,
1560 .usage = "bank_id ('SWWDG'|'HWWDG') "
1561 "('RSTSTNDBY'|'NORSTSTNDBY') "
1562 "('RSTSTOP'|'NORSTSTOP')",
1563 .help = "Replace bits in device option byte.",
1565 COMMAND_REGISTRATION_DONE
1568 static const struct command_registration stm32x_command_handlers[] = {
1571 .mode = COMMAND_ANY,
1572 .help = "stm32f1x flash command group",
1574 .chain = stm32x_exec_command_handlers,
1576 COMMAND_REGISTRATION_DONE
1579 struct flash_driver stm32f1x_flash = {
1581 .commands = stm32x_command_handlers,
1582 .flash_bank_command = stm32x_flash_bank_command,
1583 .erase = stm32x_erase,
1584 .protect = stm32x_protect,
1585 .write = stm32x_write,
1586 .read = default_flash_read,
1587 .probe = stm32x_probe,
1588 .auto_probe = stm32x_auto_probe,
1589 .erase_check = default_flash_blank_check,
1590 .protect_check = stm32x_protect_check,
1591 .info = get_stm32x_info,