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efm32: fix FTBFS on ARM due to alignment issues
[openocd.git] / src / flash / nor / efm32.c
blobd5f0559be5b5ff477f65d455c6852c8288f4a415
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 * Copyright (C) 2013 by Roman Dmitrienko *
12 * me@iamroman.org *
13 *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
18 * *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
23 * *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
28 ***************************************************************************/
29
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include "imp.h"
35 #include <helper/binarybuffer.h>
36 #include <target/algorithm.h>
37 #include <target/armv7m.h>
38 #include <target/cortex_m.h>
39
40 /* keep family IDs in decimal */
41 #define EFM_FAMILY_ID_GECKO 71
42 #define EFM_FAMILY_ID_GIANT_GECKO 72
43 #define EFM_FAMILY_ID_TINY_GECKO 73
44 #define EFM_FAMILY_ID_LEOPARD_GECKO 74
45
46 #define EFM32_FLASH_ERASE_TMO 100
47 #define EFM32_FLASH_WDATAREADY_TMO 100
48 #define EFM32_FLASH_WRITE_TMO 100
49
50 /* size in bytes, not words; must fit all Gecko devices */
51 #define LOCKBITS_PAGE_SZ 512
52
53 #define EFM32_MSC_INFO_BASE 0x0fe00000
54
55 #define EFM32_MSC_USER_DATA EFM32_MSC_INFO_BASE
56 #define EFM32_MSC_LOCK_BITS (EFM32_MSC_INFO_BASE+0x4000)
57 #define EFM32_MSC_DEV_INFO (EFM32_MSC_INFO_BASE+0x8000)
58
59 /* PAGE_SIZE is only present in Leopard and Giant Gecko MCUs */
60 #define EFM32_MSC_DI_PAGE_SIZE (EFM32_MSC_DEV_INFO+0x1e7)
61 #define EFM32_MSC_DI_FLASH_SZ (EFM32_MSC_DEV_INFO+0x1f8)
62 #define EFM32_MSC_DI_RAM_SZ (EFM32_MSC_DEV_INFO+0x1fa)
63 #define EFM32_MSC_DI_PART_NUM (EFM32_MSC_DEV_INFO+0x1fc)
64 #define EFM32_MSC_DI_PART_FAMILY (EFM32_MSC_DEV_INFO+0x1fe)
65 #define EFM32_MSC_DI_PROD_REV (EFM32_MSC_DEV_INFO+0x1ff)
66
67 #define EFM32_MSC_REGBASE 0x400c0000
68 #define EFM32_MSC_WRITECTRL (EFM32_MSC_REGBASE+0x008)
69 #define EFM32_MSC_WRITECTRL_WREN_MASK 0x1
70 #define EFM32_MSC_WRITECMD (EFM32_MSC_REGBASE+0x00c)
71 #define EFM32_MSC_WRITECMD_LADDRIM_MASK 0x1
72 #define EFM32_MSC_WRITECMD_ERASEPAGE_MASK 0x2
73 #define EFM32_MSC_WRITECMD_WRITEONCE_MASK 0x8
74 #define EFM32_MSC_ADDRB (EFM32_MSC_REGBASE+0x010)
75 #define EFM32_MSC_WDATA (EFM32_MSC_REGBASE+0x018)
76 #define EFM32_MSC_STATUS (EFM32_MSC_REGBASE+0x01c)
77 #define EFM32_MSC_STATUS_BUSY_MASK 0x1
78 #define EFM32_MSC_STATUS_LOCKED_MASK 0x2
79 #define EFM32_MSC_STATUS_INVADDR_MASK 0x4
80 #define EFM32_MSC_STATUS_WDATAREADY_MASK 0x8
81 #define EFM32_MSC_STATUS_WORDTIMEOUT_MASK 0x10
82 #define EFM32_MSC_STATUS_ERASEABORTED_MASK 0x20
83 #define EFM32_MSC_LOCK (EFM32_MSC_REGBASE+0x03c)
84 #define EFM32_MSC_LOCK_LOCKKEY 0x1b71
85
86 struct efm32x_flash_bank {
87 int probed;
88 uint32_t lb_page[LOCKBITS_PAGE_SZ/4];
89 };
90
91 struct efm32_info {
92 uint16_t flash_sz_kib;
93 uint16_t ram_sz_kib;
94 uint16_t part_num;
95 uint8_t part_family;
96 uint8_t prod_rev;
97 uint16_t page_size;
98 };
99
100 static int efm32x_write(struct flash_bank *bank, uint8_t *buffer,
101 uint32_t offset, uint32_t count);
102
103 static int efm32x_get_flash_size(struct flash_bank *bank, uint16_t *flash_sz)
104 {
105 return target_read_u16(bank->target, EFM32_MSC_DI_FLASH_SZ, flash_sz);
106 }
107
108 static int efm32x_get_ram_size(struct flash_bank *bank, uint16_t *ram_sz)
109 {
110 return target_read_u16(bank->target, EFM32_MSC_DI_RAM_SZ, ram_sz);
111 }
112
113 static int efm32x_get_part_num(struct flash_bank *bank, uint16_t *pnum)
114 {
115 return target_read_u16(bank->target, EFM32_MSC_DI_PART_NUM, pnum);
116 }
117
118 static int efm32x_get_part_family(struct flash_bank *bank, uint8_t *pfamily)
119 {
120 return target_read_u8(bank->target, EFM32_MSC_DI_PART_FAMILY, pfamily);
121 }
122
123 static int efm32x_get_prod_rev(struct flash_bank *bank, uint8_t *prev)
124 {
125 return target_read_u8(bank->target, EFM32_MSC_DI_PROD_REV, prev);
126 }
127
128 static int efm32x_read_info(struct flash_bank *bank,
129 struct efm32_info *efm32_info)
130 {
131 int ret;
132 uint32_t cpuid = 0;
133
134 memset(efm32_info, 0, sizeof(struct efm32_info));
135
136 ret = target_read_u32(bank->target, CPUID, &cpuid);
137 if (ERROR_OK != ret)
138 return ret;
139
140 if (((cpuid >> 4) & 0xfff) == 0xc23) {
141 /* Cortex M3 device */
142 } else {
143 LOG_ERROR("Target is not CortexM3");
144 return ERROR_FAIL;
145 }
146
147 ret = efm32x_get_flash_size(bank, &(efm32_info->flash_sz_kib));
148 if (ERROR_OK != ret)
149 return ret;
150
151 ret = efm32x_get_ram_size(bank, &(efm32_info->ram_sz_kib));
152 if (ERROR_OK != ret)
153 return ret;
154
155 ret = efm32x_get_part_num(bank, &(efm32_info->part_num));
156 if (ERROR_OK != ret)
157 return ret;
158
159 ret = efm32x_get_part_family(bank, &(efm32_info->part_family));
160 if (ERROR_OK != ret)
161 return ret;
162
163 ret = efm32x_get_prod_rev(bank, &(efm32_info->prod_rev));
164 if (ERROR_OK != ret)
165 return ret;
166
167 if (EFM_FAMILY_ID_GECKO == efm32_info->part_family ||
168 EFM_FAMILY_ID_TINY_GECKO == efm32_info->part_family)
169 efm32_info->page_size = 512;
170 else if (EFM_FAMILY_ID_GIANT_GECKO == efm32_info->part_family ||
171 EFM_FAMILY_ID_LEOPARD_GECKO == efm32_info->part_family) {
172 if (efm32_info->prod_rev >= 18) {
173 uint8_t pg_size = 0;
174 ret = target_read_u8(bank->target, EFM32_MSC_DI_PAGE_SIZE,
175 &pg_size);
176 if (ERROR_OK != ret)
177 return ret;
178
179 efm32_info->page_size = (1 << ((pg_size+10) & 0xff));
180 } else {
181 /* EFM32 GG/LG errata: MEM_INFO_PAGE_SIZE is invalid
182 for MCUs with PROD_REV < 18 */
183 if (efm32_info->flash_sz_kib < 512)
184 efm32_info->page_size = 2048;
185 else
186 efm32_info->page_size = 4096;
187 }
188
189 if ((2048 != efm32_info->page_size) &&
190 (4096 != efm32_info->page_size)) {
191 LOG_ERROR("Invalid page size %u", efm32_info->page_size);
192 return ERROR_FAIL;
193 }
194 } else {
195 LOG_ERROR("Unknown MCU family %d", efm32_info->part_family);
196 return ERROR_FAIL;
197 }
198
199 return ERROR_OK;
200 }
201
202 /* flash bank efm32 <base> <size> 0 0 <target#>
203 */
204 FLASH_BANK_COMMAND_HANDLER(efm32x_flash_bank_command)
205 {
206 struct efm32x_flash_bank *efm32x_info;
207
208 if (CMD_ARGC < 6)
209 return ERROR_COMMAND_SYNTAX_ERROR;
210
211 efm32x_info = malloc(sizeof(struct efm32x_flash_bank));
212
213 bank->driver_priv = efm32x_info;
214 efm32x_info->probed = 0;
215 memset(efm32x_info->lb_page, 0xff, LOCKBITS_PAGE_SZ);
216
217 return ERROR_OK;
218 }
219
220 /* set or reset given bits in a register */
221 static int efm32x_set_reg_bits(struct flash_bank *bank, uint32_t reg,
222 uint32_t bitmask, int set)
223 {
224 int ret = 0;
225 uint32_t reg_val = 0;
226
227 ret = target_read_u32(bank->target, reg, &reg_val);
228 if (ERROR_OK != ret)
229 return ret;
230
231 if (set)
232 reg_val |= bitmask;
233 else
234 reg_val &= ~bitmask;
235
236 return target_write_u32(bank->target, reg, reg_val);
237 }
238
239 static int efm32x_set_wren(struct flash_bank *bank, int write_enable)
240 {
241 return efm32x_set_reg_bits(bank, EFM32_MSC_WRITECTRL,
242 EFM32_MSC_WRITECTRL_WREN_MASK, write_enable);
243 }
244
245 static int efm32x_msc_lock(struct flash_bank *bank, int lock)
246 {
247 return target_write_u32(bank->target, EFM32_MSC_LOCK,
248 (lock ? 0 : EFM32_MSC_LOCK_LOCKKEY));
249 }
250
251 static int efm32x_wait_status(struct flash_bank *bank, int timeout,
252 uint32_t wait_mask, int wait_for_set)
253 {
254 int ret = 0;
255 uint32_t status = 0;
256
257 while (1) {
258 ret = target_read_u32(bank->target, EFM32_MSC_STATUS, &status);
259 if (ERROR_OK != ret)
260 break;
261
262 LOG_DEBUG("status: 0x%" PRIx32 "", status);
263
264 if (((status & wait_mask) == 0) && (0 == wait_for_set))
265 break;
266 else if (((status & wait_mask) != 0) && wait_for_set)
267 break;
268
269 if (timeout-- <= 0) {
270 LOG_ERROR("timed out waiting for MSC status");
271 return ERROR_FAIL;
272 }
273
274 alive_sleep(1);
275 }
276
277 if (status & EFM32_MSC_STATUS_ERASEABORTED_MASK)
278 LOG_WARNING("page erase was aborted");
279
280 return ret;
281 }
282
283 static int efm32x_erase_page(struct flash_bank *bank, uint32_t addr)
284 {
285 /* this function DOES NOT set WREN; must be set already */
286 /* 1. write address to ADDRB
287 2. write LADDRIM
288 3. check status (INVADDR, LOCKED)
289 4. write ERASEPAGE
290 5. wait until !STATUS_BUSY
291 */
292 int ret = 0;
293 uint32_t status = 0;
294
295 LOG_DEBUG("erasing flash page at 0x%08x", addr);
296
297 ret = target_write_u32(bank->target, EFM32_MSC_ADDRB, addr);
298 if (ERROR_OK != ret)
299 return ret;
300
301 ret = efm32x_set_reg_bits(bank, EFM32_MSC_WRITECMD,
302 EFM32_MSC_WRITECMD_LADDRIM_MASK, 1);
303 if (ERROR_OK != ret)
304 return ret;
305
306 ret = target_read_u32(bank->target, EFM32_MSC_STATUS, &status);
307 if (ERROR_OK != ret)
308 return ret;
309
310 LOG_DEBUG("status 0x%x", status);
311
312 if (status & EFM32_MSC_STATUS_LOCKED_MASK) {
313 LOG_ERROR("Page is locked");
314 return ERROR_FAIL;
315 } else if (status & EFM32_MSC_STATUS_INVADDR_MASK) {
316 LOG_ERROR("Invalid address 0x%x", addr);
317 return ERROR_FAIL;
318 }
319
320 ret = efm32x_set_reg_bits(bank, EFM32_MSC_WRITECMD,
321 EFM32_MSC_WRITECMD_ERASEPAGE_MASK, 1);
322 if (ERROR_OK != ret)
323 return ret;
324
325 return efm32x_wait_status(bank, EFM32_FLASH_ERASE_TMO,
326 EFM32_MSC_STATUS_BUSY_MASK, 0);
327 }
328
329 static int efm32x_erase(struct flash_bank *bank, int first, int last)
330 {
331 struct target *target = bank->target;
332 int i = 0;
333 int ret = 0;
334
335 if (TARGET_HALTED != target->state) {
336 LOG_ERROR("Target not halted");
337 return ERROR_TARGET_NOT_HALTED;
338 }
339
340 efm32x_msc_lock(bank, 0);
341 ret = efm32x_set_wren(bank, 1);
342 if (ERROR_OK != ret) {
343 LOG_ERROR("Failed to enable MSC write");
344 return ret;
345 }
346
347 for (i = first; i <= last; i++) {
348 ret = efm32x_erase_page(bank, bank->sectors[i].offset);
349 if (ERROR_OK != ret)
350 LOG_ERROR("Failed to erase page %d", i);
351 }
352
353 ret = efm32x_set_wren(bank, 0);
354 efm32x_msc_lock(bank, 1);
355
356 return ret;
357 }
358
359 static int efm32x_read_lock_data(struct flash_bank *bank)
360 {
361 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
362 struct target *target = bank->target;
363 int i = 0;
364 int data_size = 0;
365 uint32_t *ptr = NULL;
366 int ret = 0;
367
368 assert(!(bank->num_sectors & 0x1f));
369
370 data_size = bank->num_sectors / 8; /* number of data bytes */
371 data_size /= 4; /* ...and data dwords */
372
373 ptr = efm32x_info->lb_page;
374
375 for (i = 0; i < data_size; i++, ptr++) {
376 ret = target_read_u32(target, EFM32_MSC_LOCK_BITS+i*4, ptr);
377 if (ERROR_OK != ret) {
378 LOG_ERROR("Failed to read PLW %d", i);
379 return ret;
380 }
381 }
382
383 /* also, read ULW, DLW and MLW */
384
385 /* ULW, word 126 */
386 ptr = efm32x_info->lb_page + 126;
387 ret = target_read_u32(target, EFM32_MSC_LOCK_BITS+126*4, ptr);
388 if (ERROR_OK != ret) {
389 LOG_ERROR("Failed to read ULW");
390 return ret;
391 }
392
393 /* DLW, word 127 */
394 ptr = efm32x_info->lb_page + 127;
395 ret = target_read_u32(target, EFM32_MSC_LOCK_BITS+127*4, ptr);
396 if (ERROR_OK != ret) {
397 LOG_ERROR("Failed to read DLW");
398 return ret;
399 }
400
401 /* MLW, word 125, present in GG and LG */
402 ptr = efm32x_info->lb_page + 125;
403 ret = target_read_u32(target, EFM32_MSC_LOCK_BITS+125*4, ptr);
404 if (ERROR_OK != ret) {
405 LOG_ERROR("Failed to read MLW");
406 return ret;
407 }
408
409 return ERROR_OK;
410 }
411
412 static int efm32x_write_lock_data(struct flash_bank *bank)
413 {
414 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
415 int ret = 0;
416
417 ret = efm32x_erase_page(bank, EFM32_MSC_LOCK_BITS);
418 if (ERROR_OK != ret) {
419 LOG_ERROR("Failed to erase LB page");
420 return ret;
421 }
422
423 return efm32x_write(bank, (uint8_t *)efm32x_info->lb_page, EFM32_MSC_LOCK_BITS,
424 LOCKBITS_PAGE_SZ);
425 }
426
427 static int efm32x_get_page_lock(struct flash_bank *bank, size_t page)
428 {
429 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
430 uint32_t dw = efm32x_info->lb_page[page >> 5];
431 uint32_t mask = 0;
432
433 mask = 1 << (page & 0x1f);
434
435 return (dw & mask) ? 0 : 1;
436 }
437
438 static int efm32x_set_page_lock(struct flash_bank *bank, size_t page, int set)
439 {
440 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
441 uint32_t *dw = &efm32x_info->lb_page[page >> 5];
442 uint32_t mask = 0;
443
444 mask = 1 << (page & 0x1f);
445
446 if (!set)
447 *dw |= mask;
448 else
449 *dw &= ~mask;
450
451 return ERROR_OK;
452 }
453
454 static int efm32x_protect(struct flash_bank *bank, int set, int first, int last)
455 {
456 struct target *target = bank->target;
457 int i = 0;
458 int ret = 0;
459
460 if (!set) {
461 LOG_ERROR("Erase device data to reset page locks");
462 return ERROR_FAIL;
463 }
464
465 if (target->state != TARGET_HALTED) {
466 LOG_ERROR("Target not halted");
467 return ERROR_TARGET_NOT_HALTED;
468 }
469
470 for (i = first; i <= last; i++) {
471 ret = efm32x_set_page_lock(bank, i, set);
472 if (ERROR_OK != ret) {
473 LOG_ERROR("Failed to set lock on page %d", i);
474 return ret;
475 }
476 }
477
478 ret = efm32x_write_lock_data(bank);
479 if (ERROR_OK != ret) {
480 LOG_ERROR("Failed to write LB page");
481 return ret;
482 }
483
484 return ERROR_OK;
485 }
486
487 static int efm32x_write_block(struct flash_bank *bank, uint8_t *buf,
488 uint32_t offset, uint32_t count)
489 {
490 struct target *target = bank->target;
491 uint32_t buffer_size = 16384;
492 struct working_area *write_algorithm;
493 struct working_area *source;
494 uint32_t address = bank->base + offset;
495 struct reg_param reg_params[5];
496 struct armv7m_algorithm armv7m_info;
497 int ret = ERROR_OK;
498
499 /* see contrib/loaders/flash/efm32.S for src */
500 static const uint8_t efm32x_flash_write_code[] = {
501 /* #define EFM32_MSC_WRITECTRL_OFFSET 0x008 */
502 /* #define EFM32_MSC_WRITECMD_OFFSET 0x00c */
503 /* #define EFM32_MSC_ADDRB_OFFSET 0x010 */
504 /* #define EFM32_MSC_WDATA_OFFSET 0x018 */
505 /* #define EFM32_MSC_STATUS_OFFSET 0x01c */
506 /* #define EFM32_MSC_LOCK_OFFSET 0x03c */
507
508 0x15, 0x4e, /* ldr r6, =#0x1b71 */
509 0xc6, 0x63, /* str r6, [r0, #EFM32_MSC_LOCK_OFFSET] */
510 0x01, 0x26, /* movs r6, #1 */
511 0x86, 0x60, /* str r6, [r0, #EFM32_MSC_WRITECTRL_OFFSET] */
512
513 /* wait_fifo: */
514 0x16, 0x68, /* ldr r6, [r2, #0] */
515 0x00, 0x2e, /* cmp r6, #0 */
516 0x22, 0xd0, /* beq exit */
517 0x55, 0x68, /* ldr r5, [r2, #4] */
518 0xb5, 0x42, /* cmp r5, r6 */
519 0xf9, 0xd0, /* beq wait_fifo */
520
521 0x04, 0x61, /* str r4, [r0, #EFM32_MSC_ADDRB_OFFSET] */
522 0x01, 0x26, /* movs r6, #1 */
523 0xc6, 0x60, /* str r6, [r0, #EFM32_MSC_WRITECMD_OFFSET] */
524 0xc6, 0x69, /* ldr r6, [r0, #EFM32_MSC_STATUS_OFFSET] */
525 0x06, 0x27, /* movs r7, #6 */
526 0x3e, 0x42, /* tst r6, r7 */
527 0x16, 0xd1, /* bne error */
528
529 /* wait_wdataready: */
530 0xc6, 0x69, /* ldr r6, [r0, #EFM32_MSC_STATUS_OFFSET] */
531 0x08, 0x27, /* movs r7, #8 */
532 0x3e, 0x42, /* tst r6, r7 */
533 0xfb, 0xd0, /* beq wait_wdataready */
534
535 0x2e, 0x68, /* ldr r6, [r5] */
536 0x86, 0x61, /* str r6, [r0, #EFM32_MSC_WDATA_OFFSET] */
537 0x08, 0x26, /* movs r6, #8 */
538 0xc6, 0x60, /* str r6, [r0, #EFM32_MSC_WRITECMD_OFFSET] */
539
540 0x04, 0x35, /* adds r5, #4 */
541 0x04, 0x34, /* adds r4, #4 */
542
543 /* busy: */
544 0xc6, 0x69, /* ldr r6, [r0, #EFM32_MSC_STATUS_OFFSET] */
545 0x01, 0x27, /* movs r7, #1 */
546 0x3e, 0x42, /* tst r6, r7 */
547 0xfb, 0xd1, /* bne busy */
548
549 0x9d, 0x42, /* cmp r5, r3 */
550 0x01, 0xd3, /* bcc no_wrap */
551 0x15, 0x46, /* mov r5, r2 */
552 0x08, 0x35, /* adds r5, #8 */
553
554 /* no_wrap: */
555 0x55, 0x60, /* str r5, [r2, #4] */
556 0x01, 0x39, /* subs r1, r1, #1 */
557 0x00, 0x29, /* cmp r1, #0 */
558 0x02, 0xd0, /* beq exit */
559 0xdb, 0xe7, /* b wait_fifo */
560
561 /* error: */
562 0x00, 0x20, /* movs r0, #0 */
563 0x50, 0x60, /* str r0, [r2, #4] */
564
565 /* exit: */
566 0x30, 0x46, /* mov r0, r6 */
567 0x00, 0xbe, /* bkpt #0 */
568
569 /* LOCKKEY */
570 0x71, 0x1b, 0x00, 0x00
571 };
572
573 /* flash write code */
574 if (target_alloc_working_area(target, sizeof(efm32x_flash_write_code),
575 &write_algorithm) != ERROR_OK) {
576 LOG_WARNING("no working area available, can't do block memory writes");
577 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
578 };
579
580 ret = target_write_buffer(target, write_algorithm->address,
581 sizeof(efm32x_flash_write_code),
582 (uint8_t *)efm32x_flash_write_code);
583 if (ret != ERROR_OK)
584 return ret;
585
586 /* memory buffer */
587 while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
588 buffer_size /= 2;
589 buffer_size &= ~3UL; /* Make sure it's 4 byte aligned */
590 if (buffer_size <= 256) {
591 /* we already allocated the writing code, but failed to get a
592 * buffer, free the algorithm */
593 target_free_working_area(target, write_algorithm);
594
595 LOG_WARNING("no large enough working area available, can't do block memory writes");
596 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
597 }
598 };
599
600 init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT); /* flash base (in), status (out) */
601 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT); /* count (word-32bit) */
602 init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT); /* buffer start */
603 init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT); /* buffer end */
604 init_reg_param(&reg_params[4], "r4", 32, PARAM_IN_OUT); /* target address */
605
606 buf_set_u32(reg_params[0].value, 0, 32, EFM32_MSC_REGBASE);
607 buf_set_u32(reg_params[1].value, 0, 32, count);
608 buf_set_u32(reg_params[2].value, 0, 32, source->address);
609 buf_set_u32(reg_params[3].value, 0, 32, source->address + source->size);
610 buf_set_u32(reg_params[4].value, 0, 32, address);
611
612 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
613 armv7m_info.core_mode = ARM_MODE_THREAD;
614
615 ret = target_run_flash_async_algorithm(target, buf, count, 4,
616 0, NULL,
617 5, reg_params,
618 source->address, source->size,
619 write_algorithm->address, 0,
620 &armv7m_info);
621
622 if (ret == ERROR_FLASH_OPERATION_FAILED) {
623 LOG_ERROR("flash write failed at address 0x%"PRIx32,
624 buf_get_u32(reg_params[4].value, 0, 32));
625
626 if (buf_get_u32(reg_params[0].value, 0, 32) &
627 EFM32_MSC_STATUS_LOCKED_MASK) {
628 LOG_ERROR("flash memory write protected");
629 }
630
631 if (buf_get_u32(reg_params[0].value, 0, 32) &
632 EFM32_MSC_STATUS_INVADDR_MASK) {
633 LOG_ERROR("invalid flash memory write address");
634 }
635 }
636
637 target_free_working_area(target, source);
638 target_free_working_area(target, write_algorithm);
639
640 destroy_reg_param(&reg_params[0]);
641 destroy_reg_param(&reg_params[1]);
642 destroy_reg_param(&reg_params[2]);
643 destroy_reg_param(&reg_params[3]);
644 destroy_reg_param(&reg_params[4]);
645
646 return ret;
647 }
648
649 static int efm32x_write_word(struct flash_bank *bank, uint32_t addr,
650 uint32_t val)
651 {
652 /* this function DOES NOT set WREN; must be set already */
653 /* 1. write address to ADDRB
654 2. write LADDRIM
655 3. check status (INVADDR, LOCKED)
656 4. wait for WDATAREADY
657 5. write data to WDATA
658 6. write WRITECMD_WRITEONCE to WRITECMD
659 7. wait until !STATUS_BUSY
660 */
661
662 /* FIXME: EFM32G ref states (7.3.2) that writes should be
663 * performed twice per dword */
664
665 int ret = 0;
666 uint32_t status = 0;
667
668 /* if not called, GDB errors will be reported during large writes */
669 keep_alive();
670
671 ret = target_write_u32(bank->target, EFM32_MSC_ADDRB, addr);
672 if (ERROR_OK != ret)
673 return ret;
674
675 ret = efm32x_set_reg_bits(bank, EFM32_MSC_WRITECMD,
676 EFM32_MSC_WRITECMD_LADDRIM_MASK, 1);
677 if (ERROR_OK != ret)
678 return ret;
679
680 ret = target_read_u32(bank->target, EFM32_MSC_STATUS, &status);
681 if (ERROR_OK != ret)
682 return ret;
683
684 LOG_DEBUG("status 0x%x", status);
685
686 if (status & EFM32_MSC_STATUS_LOCKED_MASK) {
687 LOG_ERROR("Page is locked");
688 return ERROR_FAIL;
689 } else if (status & EFM32_MSC_STATUS_INVADDR_MASK) {
690 LOG_ERROR("Invalid address 0x%x", addr);
691 return ERROR_FAIL;
692 }
693
694 ret = efm32x_wait_status(bank, EFM32_FLASH_WDATAREADY_TMO,
695 EFM32_MSC_STATUS_WDATAREADY_MASK, 1);
696 if (ERROR_OK != ret) {
697 LOG_ERROR("Wait for WDATAREADY failed");
698 return ret;
699 }
700
701 ret = target_write_u32(bank->target, EFM32_MSC_WDATA, val);
702 if (ERROR_OK != ret) {
703 LOG_ERROR("WDATA write failed");
704 return ret;
705 }
706
707 ret = target_write_u32(bank->target, EFM32_MSC_WRITECMD,
708 EFM32_MSC_WRITECMD_WRITEONCE_MASK);
709 if (ERROR_OK != ret) {
710 LOG_ERROR("WRITECMD write failed");
711 return ret;
712 }
713
714 ret = efm32x_wait_status(bank, EFM32_FLASH_WRITE_TMO,
715 EFM32_MSC_STATUS_BUSY_MASK, 0);
716 if (ERROR_OK != ret) {
717 LOG_ERROR("Wait for BUSY failed");
718 return ret;
719 }
720
721 return ERROR_OK;
722 }
723
724 static int efm32x_write(struct flash_bank *bank, uint8_t *buffer,
725 uint32_t offset, uint32_t count)
726 {
727 struct target *target = bank->target;
728 uint8_t *new_buffer = NULL;
729
730 if (target->state != TARGET_HALTED) {
731 LOG_ERROR("Target not halted");
732 return ERROR_TARGET_NOT_HALTED;
733 }
734
735 if (offset & 0x3) {
736 LOG_ERROR("offset 0x%" PRIx32 " breaks required 4-byte "
737 "alignment", offset);
738 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
739 }
740
741 if (count & 0x3) {
742 uint32_t old_count = count;
743 count = (old_count | 3) + 1;
744 new_buffer = malloc(count);
745 if (new_buffer == NULL) {
746 LOG_ERROR("odd number of bytes to write and no memory "
747 "for padding buffer");
748 return ERROR_FAIL;
749 }
750 LOG_INFO("odd number of bytes to write (%d), extending to %d "
751 "and padding with 0xff", old_count, count);
752 memset(buffer, 0xff, count);
753 buffer = memcpy(new_buffer, buffer, old_count);
754 }
755
756 uint32_t words_remaining = count / 4;
757 int retval, retval2;
758
759 /* unlock flash registers */
760 efm32x_msc_lock(bank, 0);
761 retval = efm32x_set_wren(bank, 1);
762 if (retval != ERROR_OK)
763 goto cleanup;
764
765 /* try using a block write */
766 retval = efm32x_write_block(bank, buffer, offset, words_remaining);
767
768 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
769 /* if block write failed (no sufficient working area),
770 * we use normal (slow) single word accesses */
771 LOG_WARNING("couldn't use block writes, falling back to single "
772 "memory accesses");
773
774 while (words_remaining > 0) {
775 uint32_t value;
776 memcpy(&value, buffer, sizeof(uint32_t));
777
778 retval = efm32x_write_word(bank, offset, value);
779 if (retval != ERROR_OK)
780 goto reset_pg_and_lock;
781
782 words_remaining--;
783 buffer += 4;
784 offset += 4;
785 }
786 }
787
788 reset_pg_and_lock:
789 retval2 = efm32x_set_wren(bank, 0);
790 efm32x_msc_lock(bank, 1);
791 if (retval == ERROR_OK)
792 retval = retval2;
793
794 cleanup:
795 if (new_buffer)
796 free(new_buffer);
797
798 return retval;
799 }
800
801 static int efm32x_probe(struct flash_bank *bank)
802 {
803 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
804 struct efm32_info efm32_mcu_info;
805 int ret;
806 int i;
807 uint32_t base_address = 0x00000000;
808
809 efm32x_info->probed = 0;
810 memset(efm32x_info->lb_page, 0xff, LOCKBITS_PAGE_SZ);
811
812 ret = efm32x_read_info(bank, &efm32_mcu_info);
813 if (ERROR_OK != ret)
814 return ret;
815
816 switch (efm32_mcu_info.part_family) {
817 case EFM_FAMILY_ID_GECKO:
818 LOG_INFO("Gecko MCU detected");
819 break;
820 case EFM_FAMILY_ID_GIANT_GECKO:
821 LOG_INFO("Giant Gecko MCU detected");
822 break;
823 case EFM_FAMILY_ID_TINY_GECKO:
824 LOG_INFO("Tiny Gecko MCU detected");
825 break;
826 case EFM_FAMILY_ID_LEOPARD_GECKO:
827 LOG_INFO("Leopard Gecko MCU detected");
828 break;
829 default:
830 LOG_ERROR("Unsupported MCU family %d",
831 efm32_mcu_info.part_family);
832 return ERROR_FAIL;
833 }
834
835 LOG_INFO("flash size = %dkbytes", efm32_mcu_info.flash_sz_kib);
836 LOG_INFO("flash page size = %dbytes", efm32_mcu_info.page_size);
837
838 assert(0 != efm32_mcu_info.page_size);
839
840 int num_pages = efm32_mcu_info.flash_sz_kib * 1024 /
841 efm32_mcu_info.page_size;
842
843 assert(num_pages > 0);
844
845 if (bank->sectors) {
846 free(bank->sectors);
847 bank->sectors = NULL;
848 }
849
850 bank->base = base_address;
851 bank->size = (num_pages * efm32_mcu_info.page_size);
852 bank->num_sectors = num_pages;
853
854 ret = efm32x_read_lock_data(bank);
855 if (ERROR_OK != ret) {
856 LOG_ERROR("Failed to read LB data");
857 return ret;
858 }
859
860 bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
861
862 for (i = 0; i < num_pages; i++) {
863 bank->sectors[i].offset = i * efm32_mcu_info.page_size;
864 bank->sectors[i].size = efm32_mcu_info.page_size;
865 bank->sectors[i].is_erased = -1;
866 bank->sectors[i].is_protected = 1;
867 }
868
869 efm32x_info->probed = 1;
870
871 return ERROR_OK;
872 }
873
874 static int efm32x_auto_probe(struct flash_bank *bank)
875 {
876 struct efm32x_flash_bank *efm32x_info = bank->driver_priv;
877 if (efm32x_info->probed)
878 return ERROR_OK;
879 return efm32x_probe(bank);
880 }
881
882 static int efm32x_protect_check(struct flash_bank *bank)
883 {
884 struct target *target = bank->target;
885 int ret = 0;
886 int i = 0;
887
888 if (target->state != TARGET_HALTED) {
889 LOG_ERROR("Target not halted");
890 return ERROR_TARGET_NOT_HALTED;
891 }
892
893 ret = efm32x_read_lock_data(bank);
894 if (ERROR_OK != ret) {
895 LOG_ERROR("Failed to read LB data");
896 return ret;
897 }
898
899 assert(NULL != bank->sectors);
900
901 for (i = 0; i < bank->num_sectors; i++)
902 bank->sectors[i].is_protected = efm32x_get_page_lock(bank, i);
903
904 return ERROR_OK;
905 }
906
907 static int get_efm32x_info(struct flash_bank *bank, char *buf, int buf_size)
908 {
909 struct efm32_info info;
910 int ret = 0;
911 int printed = 0;
912
913 ret = efm32x_read_info(bank, &info);
914 if (ERROR_OK != ret) {
915 LOG_ERROR("Failed to read EFM32 info");
916 return ret;
917 }
918
919 printed = snprintf(buf, buf_size, "EFM32 ");
920 buf += printed;
921 buf_size -= printed;
922
923 if (0 >= buf_size)
924 return ERROR_BUF_TOO_SMALL;
925
926 switch (info.part_family) {
927 case EFM_FAMILY_ID_GECKO:
928 printed = snprintf(buf, buf_size, "Gecko");
929 break;
930 case EFM_FAMILY_ID_GIANT_GECKO:
931 printed = snprintf(buf, buf_size, "Giant Gecko");
932 break;
933 case EFM_FAMILY_ID_TINY_GECKO:
934 printed = snprintf(buf, buf_size, "Tiny Gecko");
935 break;
936 case EFM_FAMILY_ID_LEOPARD_GECKO:
937 printed = snprintf(buf, buf_size, "Leopard Gecko");
938 break;
939 }
940
941 buf += printed;
942 buf_size -= printed;
943
944 if (0 >= buf_size)
945 return ERROR_BUF_TOO_SMALL;
946
947 printed = snprintf(buf, buf_size, " - Rev: %d", info.prod_rev);
948 buf += printed;
949 buf_size -= printed;
950
951 if (0 >= buf_size)
952 return ERROR_BUF_TOO_SMALL;
953
954 return ERROR_OK;
955 }
956
957 static const struct command_registration efm32x_exec_command_handlers[] = {
958 COMMAND_REGISTRATION_DONE
959 };
960
961 static const struct command_registration efm32x_command_handlers[] = {
962 {
963 .name = "efm32",
964 .mode = COMMAND_ANY,
965 .help = "efm32 flash command group",
966 .usage = "",
967 .chain = efm32x_exec_command_handlers,
968 },
969 COMMAND_REGISTRATION_DONE
970 };
971
972 struct flash_driver efm32_flash = {
973 .name = "efm32",
974 .commands = efm32x_command_handlers,
975 .flash_bank_command = efm32x_flash_bank_command,
976 .erase = efm32x_erase,
977 .protect = efm32x_protect,
978 .write = efm32x_write,
979 .read = default_flash_read,
980 .probe = efm32x_probe,
981 .auto_probe = efm32x_auto_probe,
982 .erase_check = default_flash_blank_check,
983 .protect_check = efm32x_protect_check,
984 .info = get_efm32x_info,
985 };
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