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stlink: remove usb timeout magic numbers
[openocd.git] / src / jtag / drivers / stlink_usb.c
1 /***************************************************************************
2 * Copyright (C) 2011-2012 by Mathias Kuester *
3 * Mathias Kuester <kesmtp@freenet.de> *
4 * *
5 * Copyright (C) 2012 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * This code is based on https://github.com/texane/stlink *
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License as published by *
12 * the Free Software Foundation; either version 2 of the License, or *
13 * (at your option) any later version. *
14 * *
15 * This program is distributed in the hope that it will be useful, *
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
18 * GNU General Public License for more details. *
19 * *
20 * You should have received a copy of the GNU General Public License *
21 * along with this program; if not, write to the *
22 * Free Software Foundation, Inc., *
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
24 ***************************************************************************/
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 /* project specific includes */
31 #include <helper/binarybuffer.h>
32 #include <jtag/interface.h>
33 #include <jtag/hla/hla_layout.h>
34 #include <jtag/hla/hla_transport.h>
35 #include <jtag/hla/hla_interface.h>
36 #include <target/target.h>
37
38 #include <target/cortex_m.h>
39
40 #include "libusb_common.h"
41
42 #define ENDPOINT_IN 0x80
43 #define ENDPOINT_OUT 0x00
44
45 #define STLINK_WRITE_TIMEOUT 1000
46 #define STLINK_READ_TIMEOUT 1000
47
48 #define STLINK_NULL_EP 0
49 #define STLINK_RX_EP (1|ENDPOINT_IN)
50 #define STLINK_TX_EP (2|ENDPOINT_OUT)
51 #define STLINK_TRACE_EP (3|ENDPOINT_IN)
52 #define STLINK_SG_SIZE (31)
53 #define STLINK_DATA_SIZE (4*128)
54 #define STLINK_CMD_SIZE_V2 (16)
55 #define STLINK_CMD_SIZE_V1 (10)
56
57 enum stlink_jtag_api_version {
58 STLINK_JTAG_API_V1 = 1,
59 STLINK_JTAG_API_V2,
60 };
61
62 /** */
63 struct stlink_usb_version {
64 /** */
65 int stlink;
66 /** */
67 int jtag;
68 /** */
69 int swim;
70 /** highest supported jtag api version */
71 enum stlink_jtag_api_version jtag_api_max;
72 };
73
74 /** */
75 struct stlink_usb_handle_s {
76 /** */
77 struct jtag_libusb_device_handle *fd;
78 /** */
79 struct libusb_transfer *trans;
80 /** */
81 uint8_t cmdbuf[STLINK_SG_SIZE];
82 /** */
83 uint8_t cmdidx;
84 /** */
85 uint8_t direction;
86 /** */
87 uint8_t databuf[STLINK_DATA_SIZE];
88 /** */
89 enum hl_transports transport;
90 /** */
91 struct stlink_usb_version version;
92 /** */
93 uint16_t vid;
94 /** */
95 uint16_t pid;
96 /** this is the currently used jtag api */
97 enum stlink_jtag_api_version jtag_api;
98 /** */
99 struct {
100 /** whether SWO tracing is enabled or not */
101 bool enabled;
102 /** trace data destination file */
103 FILE *output_f;
104 /** trace module source clock (for prescaler) */
105 uint32_t source_hz;
106 /** trace module clock prescaler */
107 uint32_t prescale;
108 } trace;
109 };
110
111 #define STLINK_DEBUG_ERR_OK 0x80
112 #define STLINK_DEBUG_ERR_FAULT 0x81
113 #define STLINK_SWD_AP_WAIT 0x10
114 #define STLINK_SWD_DP_WAIT 0x14
115
116 #define STLINK_CORE_RUNNING 0x80
117 #define STLINK_CORE_HALTED 0x81
118 #define STLINK_CORE_STAT_UNKNOWN -1
119
120 #define STLINK_GET_VERSION 0xF1
121 #define STLINK_DEBUG_COMMAND 0xF2
122 #define STLINK_DFU_COMMAND 0xF3
123 #define STLINK_SWIM_COMMAND 0xF4
124 #define STLINK_GET_CURRENT_MODE 0xF5
125 #define STLINK_GET_TARGET_VOLTAGE 0xF7
126
127 #define STLINK_DEV_DFU_MODE 0x00
128 #define STLINK_DEV_MASS_MODE 0x01
129 #define STLINK_DEV_DEBUG_MODE 0x02
130 #define STLINK_DEV_SWIM_MODE 0x03
131 #define STLINK_DEV_BOOTLOADER_MODE 0x04
132 #define STLINK_DEV_UNKNOWN_MODE -1
133
134 #define STLINK_DFU_EXIT 0x07
135
136 #define STLINK_SWIM_ENTER 0x00
137 #define STLINK_SWIM_EXIT 0x01
138
139 #define STLINK_DEBUG_ENTER_JTAG 0x00
140 #define STLINK_DEBUG_GETSTATUS 0x01
141 #define STLINK_DEBUG_FORCEDEBUG 0x02
142 #define STLINK_DEBUG_APIV1_RESETSYS 0x03
143 #define STLINK_DEBUG_APIV1_READALLREGS 0x04
144 #define STLINK_DEBUG_APIV1_READREG 0x05
145 #define STLINK_DEBUG_APIV1_WRITEREG 0x06
146 #define STLINK_DEBUG_READMEM_32BIT 0x07
147 #define STLINK_DEBUG_WRITEMEM_32BIT 0x08
148 #define STLINK_DEBUG_RUNCORE 0x09
149 #define STLINK_DEBUG_STEPCORE 0x0a
150 #define STLINK_DEBUG_APIV1_SETFP 0x0b
151 #define STLINK_DEBUG_READMEM_8BIT 0x0c
152 #define STLINK_DEBUG_WRITEMEM_8BIT 0x0d
153 #define STLINK_DEBUG_APIV1_CLEARFP 0x0e
154 #define STLINK_DEBUG_APIV1_WRITEDEBUGREG 0x0f
155 #define STLINK_DEBUG_APIV1_SETWATCHPOINT 0x10
156
157 #define STLINK_DEBUG_ENTER_JTAG 0x00
158 #define STLINK_DEBUG_ENTER_SWD 0xa3
159
160 #define STLINK_DEBUG_APIV1_ENTER 0x20
161 #define STLINK_DEBUG_EXIT 0x21
162 #define STLINK_DEBUG_READCOREID 0x22
163
164 #define STLINK_DEBUG_APIV2_ENTER 0x30
165 #define STLINK_DEBUG_APIV2_READ_IDCODES 0x31
166 #define STLINK_DEBUG_APIV2_RESETSYS 0x32
167 #define STLINK_DEBUG_APIV2_READREG 0x33
168 #define STLINK_DEBUG_APIV2_WRITEREG 0x34
169 #define STLINK_DEBUG_APIV2_WRITEDEBUGREG 0x35
170 #define STLINK_DEBUG_APIV2_READDEBUGREG 0x36
171
172 #define STLINK_DEBUG_APIV2_READALLREGS 0x3A
173 #define STLINK_DEBUG_APIV2_GETLASTRWSTATUS 0x3B
174 #define STLINK_DEBUG_APIV2_DRIVE_NRST 0x3C
175
176 #define STLINK_DEBUG_APIV2_START_TRACE_RX 0x40
177 #define STLINK_DEBUG_APIV2_STOP_TRACE_RX 0x41
178 #define STLINK_DEBUG_APIV2_GET_TRACE_NB 0x42
179
180 #define STLINK_DEBUG_APIV2_DRIVE_NRST_LOW 0x00
181 #define STLINK_DEBUG_APIV2_DRIVE_NRST_HIGH 0x01
182 #define STLINK_DEBUG_APIV2_DRIVE_NRST_PULSE 0x02
183
184 #define STLINK_TRACE_SIZE 1024
185 #define STLINK_TRACE_MAX_HZ 2000000
186 #define STLINK_TRACE_MIN_VERSION 13
187
188 /** */
189 enum stlink_mode {
190 STLINK_MODE_UNKNOWN = 0,
191 STLINK_MODE_DFU,
192 STLINK_MODE_MASS,
193 STLINK_MODE_DEBUG_JTAG,
194 STLINK_MODE_DEBUG_SWD,
195 STLINK_MODE_DEBUG_SWIM
196 };
197
198 #define REQUEST_SENSE 0x03
199 #define REQUEST_SENSE_LENGTH 18
200
201 static void stlink_usb_init_buffer(void *handle, uint8_t direction, uint32_t size);
202
203 /** */
204 static int stlink_usb_xfer_v1_get_status(void *handle)
205 {
206 struct stlink_usb_handle_s *h;
207
208 assert(handle != NULL);
209
210 h = (struct stlink_usb_handle_s *)handle;
211
212 /* read status */
213 memset(h->cmdbuf, 0, STLINK_SG_SIZE);
214
215 if (jtag_libusb_bulk_read(h->fd, STLINK_RX_EP, (char *)h->cmdbuf,
216 13, STLINK_READ_TIMEOUT) != 13)
217 return ERROR_FAIL;
218
219 uint32_t t1;
220
221 t1 = buf_get_u32(h->cmdbuf, 0, 32);
222
223 /* check for USBS */
224 if (t1 != 0x53425355)
225 return ERROR_FAIL;
226 /*
227 * CSW status:
228 * 0 success
229 * 1 command failure
230 * 2 phase error
231 */
232 if (h->cmdbuf[12] != 0)
233 return ERROR_FAIL;
234
235 return ERROR_OK;
236 }
237
238 /** */
239 static int stlink_usb_xfer_rw(void *handle, int cmdsize, const uint8_t *buf, int size)
240 {
241 struct stlink_usb_handle_s *h;
242
243 assert(handle != NULL);
244
245 h = (struct stlink_usb_handle_s *)handle;
246
247 if (jtag_libusb_bulk_write(h->fd, STLINK_TX_EP, (char *)h->cmdbuf, cmdsize,
248 STLINK_WRITE_TIMEOUT) != cmdsize) {
249 return ERROR_FAIL;
250 }
251
252 if (h->direction == STLINK_TX_EP && size) {
253 if (jtag_libusb_bulk_write(h->fd, STLINK_TX_EP, (char *)buf,
254 size, STLINK_WRITE_TIMEOUT) != size) {
255 LOG_DEBUG("bulk write failed");
256 return ERROR_FAIL;
257 }
258 } else if (h->direction == STLINK_RX_EP && size) {
259 if (jtag_libusb_bulk_read(h->fd, STLINK_RX_EP, (char *)buf,
260 size, STLINK_READ_TIMEOUT) != size) {
261 LOG_DEBUG("bulk read failed");
262 return ERROR_FAIL;
263 }
264 }
265
266 return ERROR_OK;
267 }
268
269 /** */
270 static int stlink_usb_xfer_v1_get_sense(void *handle)
271 {
272 int res;
273 struct stlink_usb_handle_s *h;
274
275 assert(handle != NULL);
276
277 h = (struct stlink_usb_handle_s *)handle;
278
279 stlink_usb_init_buffer(handle, STLINK_RX_EP, 16);
280
281 h->cmdbuf[h->cmdidx++] = REQUEST_SENSE;
282 h->cmdbuf[h->cmdidx++] = 0;
283 h->cmdbuf[h->cmdidx++] = 0;
284 h->cmdbuf[h->cmdidx++] = 0;
285 h->cmdbuf[h->cmdidx++] = REQUEST_SENSE_LENGTH;
286
287 res = stlink_usb_xfer_rw(handle, REQUEST_SENSE_LENGTH, h->databuf, 16);
288
289 if (res != ERROR_OK)
290 return res;
291
292 if (stlink_usb_xfer_v1_get_status(handle) != ERROR_OK)
293 return ERROR_FAIL;
294
295 return ERROR_OK;
296 }
297
298 /** */
299 static int stlink_usb_xfer(void *handle, const uint8_t *buf, int size)
300 {
301 int err, cmdsize = STLINK_CMD_SIZE_V2;
302 struct stlink_usb_handle_s *h;
303
304 assert(handle != NULL);
305
306 h = (struct stlink_usb_handle_s *)handle;
307
308 if (h->version.stlink == 1)
309 cmdsize = STLINK_SG_SIZE;
310
311 err = stlink_usb_xfer_rw(handle, cmdsize, buf, size);
312
313 if (err != ERROR_OK)
314 return err;
315
316 if (h->version.stlink == 1) {
317 if (stlink_usb_xfer_v1_get_status(handle) != ERROR_OK) {
318 /* check csw status */
319 if (h->cmdbuf[12] == 1) {
320 LOG_DEBUG("get sense");
321 if (stlink_usb_xfer_v1_get_sense(handle) != ERROR_OK)
322 return ERROR_FAIL;
323 }
324 return ERROR_FAIL;
325 }
326 }
327
328 return ERROR_OK;
329 }
330
331 /** */
332 static int stlink_usb_read_trace(void *handle, const uint8_t *buf, int size)
333 {
334 struct stlink_usb_handle_s *h;
335
336 assert(handle != NULL);
337
338 h = (struct stlink_usb_handle_s *)handle;
339
340 assert(h->version.stlink >= 2);
341
342 if (jtag_libusb_bulk_read(h->fd, STLINK_TRACE_EP, (char *)buf,
343 size, STLINK_READ_TIMEOUT) != size) {
344 LOG_ERROR("bulk trace read failed");
345 return ERROR_FAIL;
346 }
347
348 return ERROR_OK;
349 }
350
351 /** */
352 static void stlink_usb_xfer_v1_create_cmd(void *handle, uint8_t direction, uint32_t size)
353 {
354 struct stlink_usb_handle_s *h;
355
356 h = (struct stlink_usb_handle_s *)handle;
357
358 /* fill the send buffer */
359 strcpy((char *)h->cmdbuf, "USBC");
360 h->cmdidx += 4;
361 /* csw tag not used */
362 h->cmdidx += 4;
363 buf_set_u32(h->cmdbuf+h->cmdidx, 0, 32, size);
364 h->cmdidx += 4;
365 h->cmdbuf[h->cmdidx++] = (direction == STLINK_RX_EP ? ENDPOINT_IN : ENDPOINT_OUT);
366 h->cmdbuf[h->cmdidx++] = 0; /* lun */
367 h->cmdbuf[h->cmdidx++] = STLINK_CMD_SIZE_V1;
368 }
369
370 /** */
371 static void stlink_usb_init_buffer(void *handle, uint8_t direction, uint32_t size)
372 {
373 struct stlink_usb_handle_s *h;
374
375 h = (struct stlink_usb_handle_s *)handle;
376
377 h->direction = direction;
378
379 h->cmdidx = 0;
380
381 memset(h->cmdbuf, 0, STLINK_SG_SIZE);
382 memset(h->databuf, 0, STLINK_DATA_SIZE);
383
384 if (h->version.stlink == 1)
385 stlink_usb_xfer_v1_create_cmd(handle, direction, size);
386 }
387
388 static const char * const stlink_usb_error_msg[] = {
389 "unknown"
390 };
391
392 /** */
393 static int stlink_usb_error_check(void *handle)
394 {
395 int res;
396 const char *err_msg = 0;
397 struct stlink_usb_handle_s *h;
398
399 assert(handle != NULL);
400
401 h = (struct stlink_usb_handle_s *)handle;
402
403 /* TODO: no error checking yet on api V1 */
404 if (h->jtag_api == STLINK_JTAG_API_V1)
405 h->databuf[0] = STLINK_DEBUG_ERR_OK;
406
407 switch (h->databuf[0]) {
408 case STLINK_DEBUG_ERR_OK:
409 res = ERROR_OK;
410 break;
411 case STLINK_DEBUG_ERR_FAULT:
412 default:
413 err_msg = stlink_usb_error_msg[0];
414 res = ERROR_FAIL;
415 break;
416 }
417
418 if (res != ERROR_OK)
419 LOG_DEBUG("status error: %d ('%s')", h->databuf[0], err_msg);
420
421 return res;
422 }
423
424 /** */
425 static int stlink_usb_version(void *handle)
426 {
427 int res;
428 uint16_t v;
429 struct stlink_usb_handle_s *h;
430
431 assert(handle != NULL);
432
433 h = (struct stlink_usb_handle_s *)handle;
434
435 stlink_usb_init_buffer(handle, STLINK_RX_EP, 6);
436
437 h->cmdbuf[h->cmdidx++] = STLINK_GET_VERSION;
438
439 res = stlink_usb_xfer(handle, h->databuf, 6);
440
441 if (res != ERROR_OK)
442 return res;
443
444 v = (h->databuf[0] << 8) | h->databuf[1];
445
446 h->version.stlink = (v >> 12) & 0x0f;
447 h->version.jtag = (v >> 6) & 0x3f;
448 h->version.swim = v & 0x3f;
449 h->vid = buf_get_u32(h->databuf, 16, 16);
450 h->pid = buf_get_u32(h->databuf, 32, 16);
451
452 /* set the supported jtag api version
453 * API V2 is supported since JTAG V11
454 */
455 if (h->version.jtag >= 11)
456 h->version.jtag_api_max = STLINK_JTAG_API_V2;
457 else
458 h->version.jtag_api_max = STLINK_JTAG_API_V1;
459
460 LOG_INFO("STLINK v%d JTAG v%d API v%d SWIM v%d VID 0x%04X PID 0x%04X",
461 h->version.stlink,
462 h->version.jtag,
463 (h->version.jtag_api_max == STLINK_JTAG_API_V1) ? 1 : 2,
464 h->version.swim,
465 h->vid,
466 h->pid);
467
468 return ERROR_OK;
469 }
470
471 static int stlink_usb_check_voltage(void *handle, float *target_voltage)
472 {
473 struct stlink_usb_handle_s *h;
474 uint32_t adc_results[2];
475
476 h = (struct stlink_usb_handle_s *)handle;
477
478 /* only supported by stlink/v2 and for firmware >= 13 */
479 if (h->version.stlink == 1 || h->version.jtag < 13)
480 return ERROR_COMMAND_NOTFOUND;
481
482 stlink_usb_init_buffer(handle, STLINK_RX_EP, 8);
483
484 h->cmdbuf[h->cmdidx++] = STLINK_GET_TARGET_VOLTAGE;
485
486 int result = stlink_usb_xfer(handle, h->databuf, 8);
487
488 if (result != ERROR_OK)
489 return result;
490
491 /* convert result */
492 adc_results[0] = le_to_h_u32(h->databuf);
493 adc_results[1] = le_to_h_u32(h->databuf + 4);
494
495 *target_voltage = 0;
496
497 if (adc_results[0])
498 *target_voltage = 2 * ((float)adc_results[1]) * (float)(1.2 / adc_results[0]);
499
500 LOG_INFO("Target voltage: %f", (double)*target_voltage);
501
502 return ERROR_OK;
503 }
504
505 /** */
506 static int stlink_usb_current_mode(void *handle, uint8_t *mode)
507 {
508 int res;
509 struct stlink_usb_handle_s *h;
510
511 assert(handle != NULL);
512
513 h = (struct stlink_usb_handle_s *)handle;
514
515 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
516
517 h->cmdbuf[h->cmdidx++] = STLINK_GET_CURRENT_MODE;
518
519 res = stlink_usb_xfer(handle, h->databuf, 2);
520
521 if (res != ERROR_OK)
522 return res;
523
524 *mode = h->databuf[0];
525
526 return ERROR_OK;
527 }
528
529 /** */
530 static int stlink_usb_mode_enter(void *handle, enum stlink_mode type)
531 {
532 int res;
533 int rx_size = 0;
534 struct stlink_usb_handle_s *h;
535
536 assert(handle != NULL);
537
538 h = (struct stlink_usb_handle_s *)handle;
539
540 /* on api V2 we are able the read the latest command
541 * status
542 * TODO: we need the test on api V1 too
543 */
544 if (h->jtag_api == STLINK_JTAG_API_V2)
545 rx_size = 2;
546
547 stlink_usb_init_buffer(handle, STLINK_RX_EP, rx_size);
548
549 switch (type) {
550 case STLINK_MODE_DEBUG_JTAG:
551 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
552 if (h->jtag_api == STLINK_JTAG_API_V1)
553 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
554 else
555 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
556 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_JTAG;
557 break;
558 case STLINK_MODE_DEBUG_SWD:
559 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
560 if (h->jtag_api == STLINK_JTAG_API_V1)
561 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
562 else
563 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
564 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_SWD;
565 break;
566 case STLINK_MODE_DEBUG_SWIM:
567 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
568 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_ENTER;
569 break;
570 case STLINK_MODE_DFU:
571 case STLINK_MODE_MASS:
572 default:
573 return ERROR_FAIL;
574 }
575
576 res = stlink_usb_xfer(handle, h->databuf, rx_size);
577
578 if (res != ERROR_OK)
579 return res;
580
581 res = stlink_usb_error_check(h);
582
583 return res;
584 }
585
586 /** */
587 static int stlink_usb_mode_leave(void *handle, enum stlink_mode type)
588 {
589 int res;
590 struct stlink_usb_handle_s *h;
591
592 assert(handle != NULL);
593
594 h = (struct stlink_usb_handle_s *)handle;
595
596 stlink_usb_init_buffer(handle, STLINK_NULL_EP, 0);
597
598 switch (type) {
599 case STLINK_MODE_DEBUG_JTAG:
600 case STLINK_MODE_DEBUG_SWD:
601 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
602 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_EXIT;
603 break;
604 case STLINK_MODE_DEBUG_SWIM:
605 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
606 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_EXIT;
607 break;
608 case STLINK_MODE_DFU:
609 h->cmdbuf[h->cmdidx++] = STLINK_DFU_COMMAND;
610 h->cmdbuf[h->cmdidx++] = STLINK_DFU_EXIT;
611 break;
612 case STLINK_MODE_MASS:
613 default:
614 return ERROR_FAIL;
615 }
616
617 res = stlink_usb_xfer(handle, 0, 0);
618
619 if (res != ERROR_OK)
620 return res;
621
622 return ERROR_OK;
623 }
624
625 static int stlink_usb_assert_srst(void *handle, int srst);
626
627 /** */
628 static int stlink_usb_init_mode(void *handle, bool connect_under_reset)
629 {
630 int res;
631 uint8_t mode;
632 enum stlink_mode emode;
633 struct stlink_usb_handle_s *h;
634
635 assert(handle != NULL);
636
637 h = (struct stlink_usb_handle_s *)handle;
638
639 res = stlink_usb_current_mode(handle, &mode);
640
641 if (res != ERROR_OK)
642 return res;
643
644 LOG_DEBUG("MODE: 0x%02X", mode);
645
646 /* try to exit current mode */
647 switch (mode) {
648 case STLINK_DEV_DFU_MODE:
649 emode = STLINK_MODE_DFU;
650 break;
651 case STLINK_DEV_DEBUG_MODE:
652 emode = STLINK_MODE_DEBUG_SWD;
653 break;
654 case STLINK_DEV_SWIM_MODE:
655 emode = STLINK_MODE_DEBUG_SWIM;
656 break;
657 case STLINK_DEV_BOOTLOADER_MODE:
658 case STLINK_DEV_MASS_MODE:
659 default:
660 emode = STLINK_MODE_UNKNOWN;
661 break;
662 }
663
664 if (emode != STLINK_MODE_UNKNOWN) {
665 res = stlink_usb_mode_leave(handle, emode);
666
667 if (res != ERROR_OK)
668 return res;
669 }
670
671 res = stlink_usb_current_mode(handle, &mode);
672
673 if (res != ERROR_OK)
674 return res;
675
676 /* we check the target voltage here as an aid to debugging connection problems.
677 * the stlink requires the target Vdd to be connected for reliable debugging.
678 * this cmd is supported in all modes except DFU
679 */
680 if (mode != STLINK_DEV_DFU_MODE) {
681
682 float target_voltage;
683
684 /* check target voltage (if supported) */
685 res = stlink_usb_check_voltage(h, &target_voltage);
686
687 if (res != ERROR_OK) {
688 if (res != ERROR_COMMAND_NOTFOUND)
689 LOG_ERROR("voltage check failed");
690 /* attempt to continue as it is not a catastrophic failure */
691 } else {
692 /* check for a sensible target voltage, operating range is 1.65-5.5v
693 * according to datasheet */
694 if (target_voltage < 1.5)
695 LOG_ERROR("target voltage may be too low for reliable debugging");
696 }
697 }
698
699 LOG_DEBUG("MODE: 0x%02X", mode);
700
701 /* set selected mode */
702 switch (h->transport) {
703 case HL_TRANSPORT_SWD:
704 emode = STLINK_MODE_DEBUG_SWD;
705 break;
706 case HL_TRANSPORT_JTAG:
707 emode = STLINK_MODE_DEBUG_JTAG;
708 break;
709 case HL_TRANSPORT_SWIM:
710 emode = STLINK_MODE_DEBUG_SWIM;
711 break;
712 default:
713 emode = STLINK_MODE_UNKNOWN;
714 break;
715 }
716
717 if (emode == STLINK_MODE_UNKNOWN) {
718 LOG_ERROR("selected mode (transport) not supported");
719 return ERROR_FAIL;
720 }
721
722 if (connect_under_reset) {
723 res = stlink_usb_assert_srst(handle, 0);
724 if (res != ERROR_OK)
725 return res;
726 }
727
728 res = stlink_usb_mode_enter(handle, emode);
729
730 if (res != ERROR_OK)
731 return res;
732
733 res = stlink_usb_current_mode(handle, &mode);
734
735 if (res != ERROR_OK)
736 return res;
737
738 LOG_DEBUG("MODE: 0x%02X", mode);
739
740 return ERROR_OK;
741 }
742
743 /** */
744 static int stlink_usb_idcode(void *handle, uint32_t *idcode)
745 {
746 int res;
747 struct stlink_usb_handle_s *h;
748
749 assert(handle != NULL);
750
751 h = (struct stlink_usb_handle_s *)handle;
752
753 stlink_usb_init_buffer(handle, STLINK_RX_EP, 4);
754
755 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
756 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READCOREID;
757
758 res = stlink_usb_xfer(handle, h->databuf, 4);
759
760 if (res != ERROR_OK)
761 return res;
762
763 *idcode = le_to_h_u32(h->databuf);
764
765 LOG_DEBUG("IDCODE: 0x%08X", *idcode);
766
767 return ERROR_OK;
768 }
769
770 static int stlink_usb_v2_read_debug_reg(void *handle, uint32_t addr, uint32_t *val)
771 {
772 struct stlink_usb_handle_s *h;
773 int res;
774
775 assert(handle != NULL);
776
777 h = (struct stlink_usb_handle_s *)handle;
778
779 stlink_usb_init_buffer(handle, STLINK_RX_EP, 8);
780
781 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
782 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READDEBUGREG;
783 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
784 h->cmdidx += 4;
785
786 res = stlink_usb_xfer(handle, h->databuf, 8);
787
788 if (res != ERROR_OK)
789 return res;
790
791 *val = le_to_h_u32(h->databuf + 4);
792
793 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
794 }
795
796 static int stlink_usb_write_debug_reg(void *handle, uint32_t addr, uint32_t val)
797 {
798 int res;
799 struct stlink_usb_handle_s *h;
800
801 assert(handle != NULL);
802
803 h = (struct stlink_usb_handle_s *)handle;
804
805 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
806
807 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
808 if (h->jtag_api == STLINK_JTAG_API_V1)
809 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEDEBUGREG;
810 else
811 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEDEBUGREG;
812 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
813 h->cmdidx += 4;
814 h_u32_to_le(h->cmdbuf+h->cmdidx, val);
815 h->cmdidx += 4;
816
817 res = stlink_usb_xfer(handle, h->databuf, 2);
818
819 if (res != ERROR_OK)
820 return res;
821
822 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
823 }
824
825 /** */
826 static void stlink_usb_trace_read(void *handle)
827 {
828 struct stlink_usb_handle_s *h;
829
830 assert(handle != NULL);
831
832 h = (struct stlink_usb_handle_s *)handle;
833
834 if (h->trace.enabled && h->version.jtag >= STLINK_TRACE_MIN_VERSION) {
835 int res;
836
837 stlink_usb_init_buffer(handle, STLINK_RX_EP, 10);
838
839 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
840 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GET_TRACE_NB;
841
842 res = stlink_usb_xfer(handle, h->databuf, 2);
843 if (res == ERROR_OK) {
844 uint8_t buf[STLINK_TRACE_SIZE];
845 size_t size = le_to_h_u16(h->databuf);
846
847 if (size > 0) {
848 size = size < sizeof(buf) ? size : sizeof(buf) - 1;
849
850 res = stlink_usb_read_trace(handle, buf, size);
851 if (res == ERROR_OK) {
852 /* Log retrieved trace output */
853 if (fwrite(buf, 1, size, h->trace.output_f) > 0)
854 fflush(h->trace.output_f);
855 }
856 }
857 }
858 }
859 }
860
861 static enum target_state stlink_usb_v2_get_status(void *handle)
862 {
863 int result;
864 uint32_t status;
865
866 result = stlink_usb_v2_read_debug_reg(handle, DCB_DHCSR, &status);
867 if (result != ERROR_OK)
868 return TARGET_UNKNOWN;
869
870 if (status & S_HALT)
871 return TARGET_HALTED;
872 else if (status & S_RESET_ST)
873 return TARGET_RESET;
874
875 stlink_usb_trace_read(handle);
876
877 return TARGET_RUNNING;
878 }
879
880 /** */
881 static enum target_state stlink_usb_state(void *handle)
882 {
883 int res;
884 struct stlink_usb_handle_s *h;
885
886 assert(handle != NULL);
887
888 h = (struct stlink_usb_handle_s *)handle;
889
890 if (h->jtag_api == STLINK_JTAG_API_V2)
891 return stlink_usb_v2_get_status(handle);
892
893 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
894
895 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
896 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_GETSTATUS;
897
898 res = stlink_usb_xfer(handle, h->databuf, 2);
899
900 if (res != ERROR_OK)
901 return TARGET_UNKNOWN;
902
903 if (h->databuf[0] == STLINK_CORE_RUNNING)
904 return TARGET_RUNNING;
905 if (h->databuf[0] == STLINK_CORE_HALTED)
906 return TARGET_HALTED;
907
908 return TARGET_UNKNOWN;
909 }
910
911 /** */
912 static int stlink_usb_reset(void *handle)
913 {
914 int res;
915 struct stlink_usb_handle_s *h;
916
917 assert(handle != NULL);
918
919 h = (struct stlink_usb_handle_s *)handle;
920
921 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
922
923 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
924
925 if (h->jtag_api == STLINK_JTAG_API_V1)
926 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_RESETSYS;
927 else
928 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_RESETSYS;
929
930 res = stlink_usb_xfer(handle, h->databuf, 2);
931
932 if (res != ERROR_OK)
933 return res;
934
935 LOG_DEBUG("RESET: 0x%08X", h->databuf[0]);
936
937 /* the following is not a error under swd (using hardware srst), so return success */
938 if (h->databuf[0] == STLINK_SWD_AP_WAIT || h->databuf[0] == STLINK_SWD_DP_WAIT)
939 return ERROR_OK;
940
941 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
942 }
943
944 static int stlink_usb_assert_srst(void *handle, int srst)
945 {
946 int res;
947 struct stlink_usb_handle_s *h;
948
949 assert(handle != NULL);
950
951 h = (struct stlink_usb_handle_s *)handle;
952
953 if (h->jtag_api == STLINK_JTAG_API_V1)
954 return ERROR_COMMAND_NOTFOUND;
955
956 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
957
958 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
959 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_DRIVE_NRST;
960 h->cmdbuf[h->cmdidx++] = srst;
961
962 res = stlink_usb_xfer(handle, h->databuf, 2);
963
964 if (res != ERROR_OK)
965 return res;
966
967 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
968 }
969
970 /** */
971 static int stlink_configure_target_trace_port(void *handle)
972 {
973 int res;
974 uint32_t reg;
975 struct stlink_usb_handle_s *h;
976
977 assert(handle != NULL);
978
979 h = (struct stlink_usb_handle_s *)handle;
980
981 /* configure the TPI */
982
983 /* enable the trace subsystem */
984 res = stlink_usb_v2_read_debug_reg(handle, DCB_DEMCR, &reg);
985 if (res != ERROR_OK)
986 goto out;
987 res = stlink_usb_write_debug_reg(handle, DCB_DEMCR, TRCENA|reg);
988 if (res != ERROR_OK)
989 goto out;
990 /* set the TPI clock prescaler */
991 res = stlink_usb_write_debug_reg(handle, TPI_ACPR, h->trace.prescale);
992 if (res != ERROR_OK)
993 goto out;
994 /* select the pin protocol. The STLinkv2 only supports asynchronous
995 * UART emulation (NRZ) mode, so that's what we pick. */
996 res = stlink_usb_write_debug_reg(handle, TPI_SPPR, 0x02);
997 if (res != ERROR_OK)
998 goto out;
999 /* disable continuous formatting */
1000 res = stlink_usb_write_debug_reg(handle, TPI_FFCR, (1<<8));
1001 if (res != ERROR_OK)
1002 goto out;
1003
1004 /* configure the ITM */
1005
1006 /* unlock access to the ITM registers */
1007 res = stlink_usb_write_debug_reg(handle, ITM_LAR, 0xC5ACCE55);
1008 if (res != ERROR_OK)
1009 goto out;
1010 /* enable trace with ATB ID 1 */
1011 res = stlink_usb_write_debug_reg(handle, ITM_TCR, (1<<16)|(1<<0)|(1<<2));
1012 if (res != ERROR_OK)
1013 goto out;
1014 /* trace privilege */
1015 res = stlink_usb_write_debug_reg(handle, ITM_TPR, 1);
1016 if (res != ERROR_OK)
1017 goto out;
1018 /* trace port enable (port 0) */
1019 res = stlink_usb_write_debug_reg(handle, ITM_TER, (1<<0));
1020 if (res != ERROR_OK)
1021 goto out;
1022
1023 res = ERROR_OK;
1024 out:
1025 return res;
1026 }
1027
1028 /** */
1029 static void stlink_usb_trace_disable(void *handle)
1030 {
1031 int res = ERROR_OK;
1032 struct stlink_usb_handle_s *h;
1033
1034 assert(handle != NULL);
1035
1036 h = (struct stlink_usb_handle_s *)handle;
1037
1038 assert(h->version.jtag >= STLINK_TRACE_MIN_VERSION);
1039
1040 LOG_DEBUG("Tracing: disable\n");
1041
1042 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1043 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1044 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_STOP_TRACE_RX;
1045 res = stlink_usb_xfer(handle, h->databuf, 2);
1046
1047 if (res == ERROR_OK)
1048 h->trace.enabled = false;
1049 }
1050
1051
1052 /** */
1053 static int stlink_usb_trace_enable(void *handle)
1054 {
1055 int res;
1056 struct stlink_usb_handle_s *h;
1057
1058 assert(handle != NULL);
1059
1060 h = (struct stlink_usb_handle_s *)handle;
1061
1062 if (h->version.jtag >= STLINK_TRACE_MIN_VERSION) {
1063 uint32_t trace_hz;
1064
1065 res = stlink_configure_target_trace_port(handle);
1066 if (res != ERROR_OK)
1067 LOG_ERROR("Unable to configure tracing on target\n");
1068
1069 trace_hz = h->trace.prescale > 0 ?
1070 h->trace.source_hz / (h->trace.prescale + 1) :
1071 h->trace.source_hz;
1072
1073 stlink_usb_init_buffer(handle, STLINK_RX_EP, 10);
1074
1075 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1076 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_START_TRACE_RX;
1077 h_u16_to_le(h->cmdbuf+h->cmdidx, (uint16_t)STLINK_TRACE_SIZE);
1078 h->cmdidx += 2;
1079 h_u32_to_le(h->cmdbuf+h->cmdidx, trace_hz);
1080 h->cmdidx += 4;
1081
1082 res = stlink_usb_xfer(handle, h->databuf, 2);
1083
1084 if (res == ERROR_OK) {
1085 h->trace.enabled = true;
1086 LOG_DEBUG("Tracing: recording at %uHz\n", trace_hz);
1087 }
1088 } else {
1089 LOG_ERROR("Tracing is not supported by this version.");
1090 res = ERROR_FAIL;
1091 }
1092
1093 return res;
1094 }
1095
1096 /** */
1097 static int stlink_usb_run(void *handle)
1098 {
1099 int res;
1100 struct stlink_usb_handle_s *h;
1101
1102 assert(handle != NULL);
1103
1104 h = (struct stlink_usb_handle_s *)handle;
1105
1106 if (h->jtag_api == STLINK_JTAG_API_V2) {
1107 res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_DEBUGEN);
1108
1109 /* Try to start tracing, if requested */
1110 if (res == ERROR_OK && h->trace.output_f) {
1111 if (stlink_usb_trace_enable(handle) == ERROR_OK)
1112 LOG_DEBUG("Tracing: enabled\n");
1113 else
1114 LOG_ERROR("Tracing: enable failed\n");
1115 }
1116
1117 return res;
1118 }
1119
1120 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1121
1122 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1123 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_RUNCORE;
1124
1125 res = stlink_usb_xfer(handle, h->databuf, 2);
1126
1127 if (res != ERROR_OK)
1128 return res;
1129
1130 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
1131 }
1132
1133 /** */
1134 static int stlink_usb_halt(void *handle)
1135 {
1136 int res;
1137 struct stlink_usb_handle_s *h;
1138
1139 assert(handle != NULL);
1140
1141 h = (struct stlink_usb_handle_s *)handle;
1142
1143 if (h->jtag_api == STLINK_JTAG_API_V2) {
1144 res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
1145
1146 if (res == ERROR_OK && h->trace.enabled)
1147 stlink_usb_trace_disable(handle);
1148
1149 return res;
1150 }
1151
1152 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1153
1154 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1155 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_FORCEDEBUG;
1156
1157 res = stlink_usb_xfer(handle, h->databuf, 2);
1158
1159 if (res != ERROR_OK)
1160 return res;
1161
1162 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
1163 }
1164
1165 /** */
1166 static int stlink_usb_step(void *handle)
1167 {
1168 int res;
1169 struct stlink_usb_handle_s *h;
1170
1171 assert(handle != NULL);
1172
1173 h = (struct stlink_usb_handle_s *)handle;
1174
1175 if (h->jtag_api == STLINK_JTAG_API_V2) {
1176 /* TODO: this emulates the v1 api, it should really use a similar auto mask isr
1177 * that the cortex-m3 currently does. */
1178 stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_MASKINTS|C_DEBUGEN);
1179 stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_STEP|C_MASKINTS|C_DEBUGEN);
1180 return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
1181 }
1182
1183 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1184
1185 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1186 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_STEPCORE;
1187
1188 res = stlink_usb_xfer(handle, h->databuf, 2);
1189
1190 if (res != ERROR_OK)
1191 return res;
1192
1193 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
1194 }
1195
1196 /** */
1197 static int stlink_usb_read_regs(void *handle)
1198 {
1199 int res;
1200 struct stlink_usb_handle_s *h;
1201
1202 assert(handle != NULL);
1203
1204 h = (struct stlink_usb_handle_s *)handle;
1205
1206 stlink_usb_init_buffer(handle, STLINK_RX_EP, 84);
1207
1208 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1209 if (h->jtag_api == STLINK_JTAG_API_V1)
1210 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READALLREGS;
1211 else
1212 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READALLREGS;
1213
1214 res = stlink_usb_xfer(handle, h->databuf, 84);
1215
1216 if (res != ERROR_OK)
1217 return res;
1218
1219 return ERROR_OK;
1220 }
1221
1222 /** */
1223 static int stlink_usb_read_reg(void *handle, int num, uint32_t *val)
1224 {
1225 int res;
1226 struct stlink_usb_handle_s *h;
1227
1228 assert(handle != NULL);
1229
1230 h = (struct stlink_usb_handle_s *)handle;
1231
1232 stlink_usb_init_buffer(handle, STLINK_RX_EP, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
1233
1234 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1235 if (h->jtag_api == STLINK_JTAG_API_V1)
1236 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READREG;
1237 else
1238 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READREG;
1239 h->cmdbuf[h->cmdidx++] = num;
1240
1241 res = stlink_usb_xfer(handle, h->databuf, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
1242
1243 if (res != ERROR_OK)
1244 return res;
1245
1246 if (h->jtag_api == STLINK_JTAG_API_V1)
1247 *val = le_to_h_u32(h->databuf);
1248 else {
1249 *val = le_to_h_u32(h->databuf + 4);
1250 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
1251 }
1252
1253 return ERROR_OK;
1254 }
1255
1256 /** */
1257 static int stlink_usb_write_reg(void *handle, int num, uint32_t val)
1258 {
1259 int res;
1260 struct stlink_usb_handle_s *h;
1261
1262 assert(handle != NULL);
1263
1264 h = (struct stlink_usb_handle_s *)handle;
1265
1266 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1267
1268 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1269 if (h->jtag_api == STLINK_JTAG_API_V1)
1270 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEREG;
1271 else
1272 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEREG;
1273 h->cmdbuf[h->cmdidx++] = num;
1274 h_u32_to_le(h->cmdbuf+h->cmdidx, val);
1275 h->cmdidx += 4;
1276
1277 res = stlink_usb_xfer(handle, h->databuf, 2);
1278
1279 if (res != ERROR_OK)
1280 return res;
1281
1282 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
1283 }
1284
1285 static int stlink_usb_get_rw_status(void *handle)
1286 {
1287 int res;
1288 struct stlink_usb_handle_s *h;
1289
1290 assert(handle != NULL);
1291
1292 h = (struct stlink_usb_handle_s *)handle;
1293
1294 if (h->jtag_api == STLINK_JTAG_API_V1)
1295 return ERROR_OK;
1296
1297 stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
1298
1299 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1300 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GETLASTRWSTATUS;
1301
1302 res = stlink_usb_xfer(handle, h->databuf, 2);
1303
1304 if (res != ERROR_OK)
1305 return res;
1306
1307 return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : res;
1308 }
1309
1310 /** */
1311 static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
1312 uint8_t *buffer)
1313 {
1314 int res;
1315 uint16_t read_len = len;
1316 struct stlink_usb_handle_s *h;
1317
1318 assert(handle != NULL);
1319
1320 h = (struct stlink_usb_handle_s *)handle;
1321
1322 stlink_usb_init_buffer(handle, STLINK_RX_EP, read_len);
1323
1324 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1325 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
1326 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1327 h->cmdidx += 4;
1328 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1329 h->cmdidx += 2;
1330
1331 /* we need to fix read length for single bytes */
1332 if (read_len == 1)
1333 read_len++;
1334
1335 res = stlink_usb_xfer(handle, h->databuf, read_len);
1336
1337 if (res != ERROR_OK)
1338 return res;
1339
1340 memcpy(buffer, h->databuf, len);
1341
1342 return stlink_usb_get_rw_status(handle);
1343 }
1344
1345 /** */
1346 static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
1347 const uint8_t *buffer)
1348 {
1349 int res;
1350 struct stlink_usb_handle_s *h;
1351
1352 assert(handle != NULL);
1353
1354 h = (struct stlink_usb_handle_s *)handle;
1355
1356 stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
1357
1358 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1359 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_8BIT;
1360 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1361 h->cmdidx += 4;
1362 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1363 h->cmdidx += 2;
1364
1365 res = stlink_usb_xfer(handle, buffer, len);
1366
1367 if (res != ERROR_OK)
1368 return res;
1369
1370 return stlink_usb_get_rw_status(handle);
1371 }
1372
1373 /** */
1374 static int stlink_usb_read_mem32(void *handle, uint32_t addr, uint16_t len,
1375 uint8_t *buffer)
1376 {
1377 int res;
1378 struct stlink_usb_handle_s *h;
1379
1380 assert(handle != NULL);
1381
1382 h = (struct stlink_usb_handle_s *)handle;
1383
1384 len *= 4;
1385
1386 stlink_usb_init_buffer(handle, STLINK_RX_EP, len);
1387
1388 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1389 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_32BIT;
1390 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1391 h->cmdidx += 4;
1392 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1393 h->cmdidx += 2;
1394
1395 res = stlink_usb_xfer(handle, h->databuf, len);
1396
1397 if (res != ERROR_OK)
1398 return res;
1399
1400 memcpy(buffer, h->databuf, len);
1401
1402 return stlink_usb_get_rw_status(handle);
1403 }
1404
1405 /** */
1406 static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
1407 const uint8_t *buffer)
1408 {
1409 int res;
1410 struct stlink_usb_handle_s *h;
1411
1412 assert(handle != NULL);
1413
1414 h = (struct stlink_usb_handle_s *)handle;
1415
1416 len *= 4;
1417
1418 stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
1419
1420 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1421 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
1422 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1423 h->cmdidx += 4;
1424 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1425 h->cmdidx += 2;
1426
1427 res = stlink_usb_xfer(handle, buffer, len);
1428
1429 if (res != ERROR_OK)
1430 return res;
1431
1432 return stlink_usb_get_rw_status(handle);
1433 }
1434
1435 static int stlink_usb_read_mem(void *handle, uint32_t addr, uint32_t size,
1436 uint32_t count, uint8_t *buffer)
1437 {
1438 if (size == 4)
1439 return stlink_usb_read_mem32(handle, addr, count, buffer);
1440 else
1441 return stlink_usb_read_mem8(handle, addr, count, buffer);
1442 }
1443
1444 static int stlink_usb_write_mem(void *handle, uint32_t addr, uint32_t size,
1445 uint32_t count, const uint8_t *buffer)
1446 {
1447 if (size == 4)
1448 return stlink_usb_write_mem32(handle, addr, count, buffer);
1449 else
1450 return stlink_usb_write_mem8(handle, addr, count, buffer);
1451 }
1452
1453 /** */
1454 static int stlink_usb_close(void *fd)
1455 {
1456 struct stlink_usb_handle_s *h;
1457
1458 h = (struct stlink_usb_handle_s *)fd;
1459
1460 if (h->fd)
1461 jtag_libusb_close(h->fd);
1462
1463 free(fd);
1464
1465 return ERROR_OK;
1466 }
1467
1468 /** */
1469 static int stlink_usb_open(struct hl_interface_param_s *param, void **fd)
1470 {
1471 int err, retry_count = 1;
1472 struct stlink_usb_handle_s *h;
1473 enum stlink_jtag_api_version api;
1474
1475 LOG_DEBUG("stlink_usb_open");
1476
1477 h = calloc(1, sizeof(struct stlink_usb_handle_s));
1478
1479 if (h == 0) {
1480 LOG_DEBUG("malloc failed");
1481 return ERROR_FAIL;
1482 }
1483
1484 h->transport = param->transport;
1485
1486 /* set max read/write buffer size in bytes */
1487 param->max_buffer = 512;
1488
1489 const uint16_t vids[] = { param->vid, 0 };
1490 const uint16_t pids[] = { param->pid, 0 };
1491
1492 LOG_DEBUG("transport: %d vid: 0x%04x pid: 0x%04x", param->transport,
1493 param->vid, param->pid);
1494
1495 /*
1496 On certain host USB configurations(e.g. MacBook Air)
1497 STLINKv2 dongle seems to have its FW in a funky state if,
1498 after plugging it in, you try to use openocd with it more
1499 then once (by launching and closing openocd). In cases like
1500 that initial attempt to read the FW info via
1501 stlink_usb_version will fail and the device has to be reset
1502 in order to become operational.
1503 */
1504 do {
1505 if (jtag_libusb_open(vids, pids, &h->fd) != ERROR_OK) {
1506 LOG_ERROR("open failed");
1507 goto error_open;
1508 }
1509
1510 jtag_libusb_set_configuration(h->fd, 0);
1511
1512 if (jtag_libusb_claim_interface(h->fd, 0) != ERROR_OK) {
1513 LOG_DEBUG("claim interface failed");
1514 goto error_open;
1515 }
1516
1517 /* wrap version for first read */
1518 switch (param->pid) {
1519 case 0x3744:
1520 h->version.stlink = 1;
1521 break;
1522 default:
1523 h->version.stlink = 2;
1524 break;
1525 }
1526
1527 /* get the device version */
1528 err = stlink_usb_version(h);
1529
1530 if (err == ERROR_OK) {
1531 break;
1532 } else if (h->version.stlink == 1 ||
1533 retry_count == 0) {
1534 LOG_ERROR("read version failed");
1535 goto error_open;
1536 } else {
1537 err = jtag_libusb_release_interface(h->fd, 0);
1538 if (err != ERROR_OK) {
1539 LOG_ERROR("release interface failed");
1540 goto error_open;
1541 }
1542
1543 err = jtag_libusb_reset_device(h->fd);
1544 if (err != ERROR_OK) {
1545 LOG_ERROR("reset device failed");
1546 goto error_open;
1547 }
1548
1549 jtag_libusb_close(h->fd);
1550 /*
1551 Give the device one second to settle down and
1552 reenumerate.
1553 */
1554 usleep(1 * 1000 * 1000);
1555 retry_count--;
1556 }
1557 } while (1);
1558
1559 /* compare usb vid/pid */
1560 if ((param->vid != h->vid) || (param->pid != h->pid))
1561 LOG_INFO("vid/pid are not identical: 0x%04X/0x%04X 0x%04X/0x%04X",
1562 param->vid, param->pid,
1563 h->vid, h->pid);
1564
1565 /* check if mode is supported */
1566 err = ERROR_OK;
1567
1568 switch (h->transport) {
1569 case HL_TRANSPORT_SWD:
1570 case HL_TRANSPORT_JTAG:
1571 if (h->version.jtag == 0)
1572 err = ERROR_FAIL;
1573 break;
1574 case HL_TRANSPORT_SWIM:
1575 if (h->version.swim == 0)
1576 err = ERROR_FAIL;
1577 break;
1578 default:
1579 err = ERROR_FAIL;
1580 break;
1581 }
1582
1583 if (err != ERROR_OK) {
1584 LOG_ERROR("mode (transport) not supported by device");
1585 goto error_open;
1586 }
1587
1588 api = h->version.jtag_api_max;
1589
1590 /* check that user has not requested certain api version
1591 * and if they have check it is supported */
1592 if ((param->api != 0) && (param->api <= h->version.jtag_api_max)) {
1593 api = param->api;
1594 LOG_INFO("using stlink api v%d", api);
1595 }
1596
1597 /* set the used jtag api, this will default to the newest supported version */
1598 h->jtag_api = api;
1599
1600 if (h->jtag_api >= 2 && param->trace_f && param->trace_source_hz > 0) {
1601 uint32_t prescale;
1602
1603 prescale = param->trace_source_hz > STLINK_TRACE_MAX_HZ ?
1604 (param->trace_source_hz / STLINK_TRACE_MAX_HZ) - 1 : 0;
1605
1606 h->trace.output_f = param->trace_f;
1607 h->trace.source_hz = param->trace_source_hz;
1608 h->trace.prescale = prescale;
1609 }
1610
1611 /* initialize the debug hardware */
1612 err = stlink_usb_init_mode(h, param->connect_under_reset);
1613
1614 if (err != ERROR_OK) {
1615 LOG_ERROR("init mode failed");
1616 goto error_open;
1617 }
1618
1619 *fd = h;
1620
1621 return ERROR_OK;
1622
1623 error_open:
1624 stlink_usb_close(h);
1625
1626 return ERROR_FAIL;
1627 }
1628
1629 /** */
1630 struct hl_layout_api_s stlink_usb_layout_api = {
1631 /** */
1632 .open = stlink_usb_open,
1633 /** */
1634 .close = stlink_usb_close,
1635 /** */
1636 .idcode = stlink_usb_idcode,
1637 /** */
1638 .state = stlink_usb_state,
1639 /** */
1640 .reset = stlink_usb_reset,
1641 /** */
1642 .assert_srst = stlink_usb_assert_srst,
1643 /** */
1644 .run = stlink_usb_run,
1645 /** */
1646 .halt = stlink_usb_halt,
1647 /** */
1648 .step = stlink_usb_step,
1649 /** */
1650 .read_regs = stlink_usb_read_regs,
1651 /** */
1652 .read_reg = stlink_usb_read_reg,
1653 /** */
1654 .write_reg = stlink_usb_write_reg,
1655 /** */
1656 .read_mem = stlink_usb_read_mem,
1657 /** */
1658 .write_mem = stlink_usb_write_mem,
1659 /** */
1660 .write_debug_reg = stlink_usb_write_debug_reg
1661 };
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