stlink: add STLINK_F_HAS_TARGET_VOLT
[openocd.git] / src / jtag / drivers / stlink_usb.c
1 /***************************************************************************
2 * SWIM contributions by Ake Rehnman *
3 * Copyright (C) 2017 Ake Rehnman *
4 * ake.rehnman(at)gmail.com *
5 * *
6 * Copyright (C) 2011-2012 by Mathias Kuester *
7 * Mathias Kuester <kesmtp@freenet.de> *
8 * *
9 * Copyright (C) 2012 by Spencer Oliver *
10 * spen@spen-soft.co.uk *
11 * *
12 * This code is based on https://github.com/texane/stlink *
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, see <http://www.gnu.org/licenses/>. *
26 ***************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 #include "config.h"
30 #endif
31
32 /* project specific includes */
33 #include <helper/binarybuffer.h>
34 #include <jtag/interface.h>
35 #include <jtag/hla/hla_layout.h>
36 #include <jtag/hla/hla_transport.h>
37 #include <jtag/hla/hla_interface.h>
38 #include <target/target.h>
39
40 #include <target/cortex_m.h>
41
42 #include "libusb_common.h"
43
44 #define ENDPOINT_IN 0x80
45 #define ENDPOINT_OUT 0x00
46
47 #define STLINK_WRITE_TIMEOUT 1000
48 #define STLINK_READ_TIMEOUT 1000
49
50 #define STLINK_NULL_EP 0
51 #define STLINK_RX_EP (1|ENDPOINT_IN)
52 #define STLINK_TX_EP (2|ENDPOINT_OUT)
53 #define STLINK_TRACE_EP (3|ENDPOINT_IN)
54
55 #define STLINK_V2_1_TX_EP (1|ENDPOINT_OUT)
56 #define STLINK_V2_1_TRACE_EP (2|ENDPOINT_IN)
57
58 #define STLINK_SG_SIZE (31)
59 #define STLINK_DATA_SIZE (4096)
60 #define STLINK_CMD_SIZE_V2 (16)
61 #define STLINK_CMD_SIZE_V1 (10)
62
63 #define STLINK_V1_PID (0x3744)
64 #define STLINK_V2_PID (0x3748)
65 #define STLINK_V2_1_PID (0x374B)
66 #define STLINK_V2_1_NO_MSD_PID (0x3752)
67
68 /* the current implementation of the stlink limits
69 * 8bit read/writes to max 64 bytes. */
70 #define STLINK_MAX_RW8 (64)
71
72 /* "WAIT" responses will be retried (with exponential backoff) at
73 * most this many times before failing to caller.
74 */
75 #define MAX_WAIT_RETRIES 8
76
77 enum stlink_jtag_api_version {
78 STLINK_JTAG_API_V1 = 1,
79 STLINK_JTAG_API_V2,
80 };
81
82 /** */
83 struct stlink_usb_version {
84 /** */
85 int stlink;
86 /** */
87 int jtag;
88 /** */
89 int swim;
90 /** highest supported jtag api version */
91 enum stlink_jtag_api_version jtag_api_max;
92 /** one bit for each feature supported. See macros STLINK_F_* */
93 uint32_t flags;
94 };
95
96 /** */
97 struct stlink_usb_handle_s {
98 /** */
99 struct jtag_libusb_device_handle *fd;
100 /** */
101 struct libusb_transfer *trans;
102 /** */
103 uint8_t rx_ep;
104 /** */
105 uint8_t tx_ep;
106 /** */
107 uint8_t trace_ep;
108 /** */
109 uint8_t cmdbuf[STLINK_SG_SIZE];
110 /** */
111 uint8_t cmdidx;
112 /** */
113 uint8_t direction;
114 /** */
115 uint8_t databuf[STLINK_DATA_SIZE];
116 /** */
117 uint32_t max_mem_packet;
118 /** */
119 enum hl_transports transport;
120 /** */
121 struct stlink_usb_version version;
122 /** */
123 uint16_t vid;
124 /** */
125 uint16_t pid;
126 /** this is the currently used jtag api */
127 enum stlink_jtag_api_version jtag_api;
128 /** */
129 struct {
130 /** whether SWO tracing is enabled or not */
131 bool enabled;
132 /** trace module source clock */
133 uint32_t source_hz;
134 } trace;
135 /** reconnect is needed next time we try to query the
136 * status */
137 bool reconnect_pending;
138 };
139
140 #define STLINK_SWIM_ERR_OK 0x00
141 #define STLINK_SWIM_BUSY 0x01
142 #define STLINK_DEBUG_ERR_OK 0x80
143 #define STLINK_DEBUG_ERR_FAULT 0x81
144 #define STLINK_SWD_AP_WAIT 0x10
145 #define STLINK_SWD_AP_FAULT 0x11
146 #define STLINK_SWD_AP_ERROR 0x12
147 #define STLINK_SWD_AP_PARITY_ERROR 0x13
148 #define STLINK_JTAG_WRITE_ERROR 0x0c
149 #define STLINK_JTAG_WRITE_VERIF_ERROR 0x0d
150 #define STLINK_SWD_DP_WAIT 0x14
151 #define STLINK_SWD_DP_FAULT 0x15
152 #define STLINK_SWD_DP_ERROR 0x16
153 #define STLINK_SWD_DP_PARITY_ERROR 0x17
154
155 #define STLINK_SWD_AP_WDATA_ERROR 0x18
156 #define STLINK_SWD_AP_STICKY_ERROR 0x19
157 #define STLINK_SWD_AP_STICKYORUN_ERROR 0x1a
158
159 #define STLINK_CORE_RUNNING 0x80
160 #define STLINK_CORE_HALTED 0x81
161 #define STLINK_CORE_STAT_UNKNOWN -1
162
163 #define STLINK_GET_VERSION 0xF1
164 #define STLINK_DEBUG_COMMAND 0xF2
165 #define STLINK_DFU_COMMAND 0xF3
166 #define STLINK_SWIM_COMMAND 0xF4
167 #define STLINK_GET_CURRENT_MODE 0xF5
168 #define STLINK_GET_TARGET_VOLTAGE 0xF7
169
170 #define STLINK_DEV_DFU_MODE 0x00
171 #define STLINK_DEV_MASS_MODE 0x01
172 #define STLINK_DEV_DEBUG_MODE 0x02
173 #define STLINK_DEV_SWIM_MODE 0x03
174 #define STLINK_DEV_BOOTLOADER_MODE 0x04
175 #define STLINK_DEV_UNKNOWN_MODE -1
176
177 #define STLINK_DFU_EXIT 0x07
178
179 /*
180 STLINK_SWIM_ENTER_SEQ
181 1.3ms low then 750Hz then 1.5kHz
182
183 STLINK_SWIM_GEN_RST
184 STM8 DM pulls reset pin low 50us
185
186 STLINK_SWIM_SPEED
187 uint8_t (0=low|1=high)
188
189 STLINK_SWIM_WRITEMEM
190 uint16_t length
191 uint32_t address
192
193 STLINK_SWIM_RESET
194 send syncronization seq (16us low, response 64 clocks low)
195 */
196 #define STLINK_SWIM_ENTER 0x00
197 #define STLINK_SWIM_EXIT 0x01
198 #define STLINK_SWIM_READ_CAP 0x02
199 #define STLINK_SWIM_SPEED 0x03
200 #define STLINK_SWIM_ENTER_SEQ 0x04
201 #define STLINK_SWIM_GEN_RST 0x05
202 #define STLINK_SWIM_RESET 0x06
203 #define STLINK_SWIM_ASSERT_RESET 0x07
204 #define STLINK_SWIM_DEASSERT_RESET 0x08
205 #define STLINK_SWIM_READSTATUS 0x09
206 #define STLINK_SWIM_WRITEMEM 0x0a
207 #define STLINK_SWIM_READMEM 0x0b
208 #define STLINK_SWIM_READBUF 0x0c
209
210 #define STLINK_DEBUG_ENTER_JTAG 0x00
211 #define STLINK_DEBUG_GETSTATUS 0x01
212 #define STLINK_DEBUG_FORCEDEBUG 0x02
213 #define STLINK_DEBUG_APIV1_RESETSYS 0x03
214 #define STLINK_DEBUG_APIV1_READALLREGS 0x04
215 #define STLINK_DEBUG_APIV1_READREG 0x05
216 #define STLINK_DEBUG_APIV1_WRITEREG 0x06
217 #define STLINK_DEBUG_READMEM_32BIT 0x07
218 #define STLINK_DEBUG_WRITEMEM_32BIT 0x08
219 #define STLINK_DEBUG_RUNCORE 0x09
220 #define STLINK_DEBUG_STEPCORE 0x0a
221 #define STLINK_DEBUG_APIV1_SETFP 0x0b
222 #define STLINK_DEBUG_READMEM_8BIT 0x0c
223 #define STLINK_DEBUG_WRITEMEM_8BIT 0x0d
224 #define STLINK_DEBUG_APIV1_CLEARFP 0x0e
225 #define STLINK_DEBUG_APIV1_WRITEDEBUGREG 0x0f
226 #define STLINK_DEBUG_APIV1_SETWATCHPOINT 0x10
227
228 #define STLINK_DEBUG_ENTER_JTAG 0x00
229 #define STLINK_DEBUG_ENTER_SWD 0xa3
230
231 #define STLINK_DEBUG_APIV1_ENTER 0x20
232 #define STLINK_DEBUG_EXIT 0x21
233 #define STLINK_DEBUG_READCOREID 0x22
234
235 #define STLINK_DEBUG_APIV2_ENTER 0x30
236 #define STLINK_DEBUG_APIV2_READ_IDCODES 0x31
237 #define STLINK_DEBUG_APIV2_RESETSYS 0x32
238 #define STLINK_DEBUG_APIV2_READREG 0x33
239 #define STLINK_DEBUG_APIV2_WRITEREG 0x34
240 #define STLINK_DEBUG_APIV2_WRITEDEBUGREG 0x35
241 #define STLINK_DEBUG_APIV2_READDEBUGREG 0x36
242
243 #define STLINK_DEBUG_APIV2_READALLREGS 0x3A
244 #define STLINK_DEBUG_APIV2_GETLASTRWSTATUS 0x3B
245 #define STLINK_DEBUG_APIV2_DRIVE_NRST 0x3C
246
247 #define STLINK_DEBUG_APIV2_START_TRACE_RX 0x40
248 #define STLINK_DEBUG_APIV2_STOP_TRACE_RX 0x41
249 #define STLINK_DEBUG_APIV2_GET_TRACE_NB 0x42
250 #define STLINK_DEBUG_APIV2_SWD_SET_FREQ 0x43
251 #define STLINK_DEBUG_APIV2_JTAG_SET_FREQ 0x44
252
253 #define STLINK_DEBUG_APIV2_READMEM_16BIT 0x47
254 #define STLINK_DEBUG_APIV2_WRITEMEM_16BIT 0x48
255
256 #define STLINK_DEBUG_APIV2_DRIVE_NRST_LOW 0x00
257 #define STLINK_DEBUG_APIV2_DRIVE_NRST_HIGH 0x01
258 #define STLINK_DEBUG_APIV2_DRIVE_NRST_PULSE 0x02
259
260 #define STLINK_TRACE_SIZE 4096
261 #define STLINK_TRACE_MAX_HZ 2000000
262
263 /** */
264 enum stlink_mode {
265 STLINK_MODE_UNKNOWN = 0,
266 STLINK_MODE_DFU,
267 STLINK_MODE_MASS,
268 STLINK_MODE_DEBUG_JTAG,
269 STLINK_MODE_DEBUG_SWD,
270 STLINK_MODE_DEBUG_SWIM
271 };
272
273 #define REQUEST_SENSE 0x03
274 #define REQUEST_SENSE_LENGTH 18
275
276 /*
277 * Map the relevant features, quirks and workaround for specific firmware
278 * version of stlink
279 */
280 #define STLINK_F_HAS_TRACE (1UL << 0)
281
282 /* aliases */
283 #define STLINK_F_HAS_TARGET_VOLT STLINK_F_HAS_TRACE
284
285 struct speed_map {
286 int speed;
287 int speed_divisor;
288 };
289
290 /* SWD clock speed */
291 static const struct speed_map stlink_khz_to_speed_map_swd[] = {
292 {4000, 0},
293 {1800, 1}, /* default */
294 {1200, 2},
295 {950, 3},
296 {480, 7},
297 {240, 15},
298 {125, 31},
299 {100, 40},
300 {50, 79},
301 {25, 158},
302 {15, 265},
303 {5, 798}
304 };
305
306 /* JTAG clock speed */
307 static const struct speed_map stlink_khz_to_speed_map_jtag[] = {
308 {18000, 2},
309 {9000, 4},
310 {4500, 8},
311 {2250, 16},
312 {1125, 32}, /* default */
313 {562, 64},
314 {281, 128},
315 {140, 256}
316 };
317
318 static void stlink_usb_init_buffer(void *handle, uint8_t direction, uint32_t size);
319 static int stlink_swim_status(void *handle);
320
321 /** */
322 static int stlink_usb_xfer_v1_get_status(void *handle)
323 {
324 struct stlink_usb_handle_s *h = handle;
325
326 assert(handle != NULL);
327
328 /* read status */
329 memset(h->cmdbuf, 0, STLINK_SG_SIZE);
330
331 if (jtag_libusb_bulk_read(h->fd, h->rx_ep, (char *)h->cmdbuf,
332 13, STLINK_READ_TIMEOUT) != 13)
333 return ERROR_FAIL;
334
335 uint32_t t1;
336
337 t1 = buf_get_u32(h->cmdbuf, 0, 32);
338
339 /* check for USBS */
340 if (t1 != 0x53425355)
341 return ERROR_FAIL;
342 /*
343 * CSW status:
344 * 0 success
345 * 1 command failure
346 * 2 phase error
347 */
348 if (h->cmdbuf[12] != 0)
349 return ERROR_FAIL;
350
351 return ERROR_OK;
352 }
353
354 /** */
355 static int stlink_usb_xfer_rw(void *handle, int cmdsize, const uint8_t *buf, int size)
356 {
357 struct stlink_usb_handle_s *h = handle;
358
359 assert(handle != NULL);
360
361 if (jtag_libusb_bulk_write(h->fd, h->tx_ep, (char *)h->cmdbuf, cmdsize,
362 STLINK_WRITE_TIMEOUT) != cmdsize) {
363 return ERROR_FAIL;
364 }
365
366 if (h->direction == h->tx_ep && size) {
367 if (jtag_libusb_bulk_write(h->fd, h->tx_ep, (char *)buf,
368 size, STLINK_WRITE_TIMEOUT) != size) {
369 LOG_DEBUG("bulk write failed");
370 return ERROR_FAIL;
371 }
372 } else if (h->direction == h->rx_ep && size) {
373 if (jtag_libusb_bulk_read(h->fd, h->rx_ep, (char *)buf,
374 size, STLINK_READ_TIMEOUT) != size) {
375 LOG_DEBUG("bulk read failed");
376 return ERROR_FAIL;
377 }
378 }
379
380 return ERROR_OK;
381 }
382
383 /** */
384 static int stlink_usb_xfer_v1_get_sense(void *handle)
385 {
386 int res;
387 struct stlink_usb_handle_s *h = handle;
388
389 assert(handle != NULL);
390
391 stlink_usb_init_buffer(handle, h->rx_ep, 16);
392
393 h->cmdbuf[h->cmdidx++] = REQUEST_SENSE;
394 h->cmdbuf[h->cmdidx++] = 0;
395 h->cmdbuf[h->cmdidx++] = 0;
396 h->cmdbuf[h->cmdidx++] = 0;
397 h->cmdbuf[h->cmdidx++] = REQUEST_SENSE_LENGTH;
398
399 res = stlink_usb_xfer_rw(handle, REQUEST_SENSE_LENGTH, h->databuf, 16);
400
401 if (res != ERROR_OK)
402 return res;
403
404 if (stlink_usb_xfer_v1_get_status(handle) != ERROR_OK)
405 return ERROR_FAIL;
406
407 return ERROR_OK;
408 }
409
410 /*
411 transfers block in cmdbuf
412 <size> indicates number of bytes in the following
413 data phase.
414 */
415 static int stlink_usb_xfer(void *handle, const uint8_t *buf, int size)
416 {
417 int err, cmdsize = STLINK_CMD_SIZE_V2;
418 struct stlink_usb_handle_s *h = handle;
419
420 assert(handle != NULL);
421
422 if (h->version.stlink == 1) {
423 cmdsize = STLINK_SG_SIZE;
424 /* put length in bCBWCBLength */
425 h->cmdbuf[14] = h->cmdidx-15;
426 }
427
428 err = stlink_usb_xfer_rw(handle, cmdsize, buf, size);
429
430 if (err != ERROR_OK)
431 return err;
432
433 if (h->version.stlink == 1) {
434 if (stlink_usb_xfer_v1_get_status(handle) != ERROR_OK) {
435 /* check csw status */
436 if (h->cmdbuf[12] == 1) {
437 LOG_DEBUG("get sense");
438 if (stlink_usb_xfer_v1_get_sense(handle) != ERROR_OK)
439 return ERROR_FAIL;
440 }
441 return ERROR_FAIL;
442 }
443 }
444
445 return ERROR_OK;
446 }
447
448 /**
449 Converts an STLINK status code held in the first byte of a response
450 to an openocd error, logs any error/wait status as debug output.
451 */
452 static int stlink_usb_error_check(void *handle)
453 {
454 struct stlink_usb_handle_s *h = handle;
455
456 assert(handle != NULL);
457
458 if (h->transport == HL_TRANSPORT_SWIM) {
459 switch (h->databuf[0]) {
460 case STLINK_SWIM_ERR_OK:
461 return ERROR_OK;
462 case STLINK_SWIM_BUSY:
463 return ERROR_WAIT;
464 default:
465 LOG_DEBUG("unknown/unexpected STLINK status code 0x%x", h->databuf[0]);
466 return ERROR_FAIL;
467 }
468 }
469
470 /* TODO: no error checking yet on api V1 */
471 if (h->jtag_api == STLINK_JTAG_API_V1)
472 h->databuf[0] = STLINK_DEBUG_ERR_OK;
473
474 switch (h->databuf[0]) {
475 case STLINK_DEBUG_ERR_OK:
476 return ERROR_OK;
477 case STLINK_DEBUG_ERR_FAULT:
478 LOG_DEBUG("SWD fault response (0x%x)", STLINK_DEBUG_ERR_FAULT);
479 return ERROR_FAIL;
480 case STLINK_SWD_AP_WAIT:
481 LOG_DEBUG("wait status SWD_AP_WAIT (0x%x)", STLINK_SWD_AP_WAIT);
482 return ERROR_WAIT;
483 case STLINK_SWD_DP_WAIT:
484 LOG_DEBUG("wait status SWD_DP_WAIT (0x%x)", STLINK_SWD_DP_WAIT);
485 return ERROR_WAIT;
486 case STLINK_JTAG_WRITE_ERROR:
487 LOG_DEBUG("Write error");
488 return ERROR_FAIL;
489 case STLINK_JTAG_WRITE_VERIF_ERROR:
490 LOG_DEBUG("Write verify error, ignoring");
491 return ERROR_OK;
492 case STLINK_SWD_AP_FAULT:
493 /* git://git.ac6.fr/openocd commit 657e3e885b9ee10
494 * returns ERROR_OK with the comment:
495 * Change in error status when reading outside RAM.
496 * This fix allows CDT plugin to visualize memory.
497 */
498 LOG_DEBUG("STLINK_SWD_AP_FAULT");
499 return ERROR_FAIL;
500 case STLINK_SWD_AP_ERROR:
501 LOG_DEBUG("STLINK_SWD_AP_ERROR");
502 return ERROR_FAIL;
503 case STLINK_SWD_AP_PARITY_ERROR:
504 LOG_DEBUG("STLINK_SWD_AP_PARITY_ERROR");
505 return ERROR_FAIL;
506 case STLINK_SWD_DP_FAULT:
507 LOG_DEBUG("STLINK_SWD_DP_FAULT");
508 return ERROR_FAIL;
509 case STLINK_SWD_DP_ERROR:
510 LOG_DEBUG("STLINK_SWD_DP_ERROR");
511 return ERROR_FAIL;
512 case STLINK_SWD_DP_PARITY_ERROR:
513 LOG_DEBUG("STLINK_SWD_DP_PARITY_ERROR");
514 return ERROR_FAIL;
515 case STLINK_SWD_AP_WDATA_ERROR:
516 LOG_DEBUG("STLINK_SWD_AP_WDATA_ERROR");
517 return ERROR_FAIL;
518 case STLINK_SWD_AP_STICKY_ERROR:
519 LOG_DEBUG("STLINK_SWD_AP_STICKY_ERROR");
520 return ERROR_FAIL;
521 case STLINK_SWD_AP_STICKYORUN_ERROR:
522 LOG_DEBUG("STLINK_SWD_AP_STICKYORUN_ERROR");
523 return ERROR_FAIL;
524 default:
525 LOG_DEBUG("unknown/unexpected STLINK status code 0x%x", h->databuf[0]);
526 return ERROR_FAIL;
527 }
528 }
529
530
531 /** Issue an STLINK command via USB transfer, with retries on any wait status responses.
532
533 Works for commands where the STLINK_DEBUG status is returned in the first
534 byte of the response packet. For SWIM a SWIM_READSTATUS is requested instead.
535
536 Returns an openocd result code.
537 */
538 static int stlink_cmd_allow_retry(void *handle, const uint8_t *buf, int size)
539 {
540 int retries = 0;
541 int res;
542 struct stlink_usb_handle_s *h = handle;
543
544 while (1) {
545 if ((h->transport != HL_TRANSPORT_SWIM) || !retries) {
546 res = stlink_usb_xfer(handle, buf, size);
547 if (res != ERROR_OK)
548 return res;
549 }
550
551 if (h->transport == HL_TRANSPORT_SWIM) {
552 res = stlink_swim_status(handle);
553 if (res != ERROR_OK)
554 return res;
555 }
556
557 res = stlink_usb_error_check(handle);
558 if (res == ERROR_WAIT && retries < MAX_WAIT_RETRIES) {
559 usleep((1<<retries++) * 1000);
560 continue;
561 }
562 return res;
563 }
564 }
565
566 /** */
567 static int stlink_usb_read_trace(void *handle, const uint8_t *buf, int size)
568 {
569 struct stlink_usb_handle_s *h = handle;
570
571 assert(handle != NULL);
572
573 assert(h->version.flags & STLINK_F_HAS_TRACE);
574
575 if (jtag_libusb_bulk_read(h->fd, h->trace_ep, (char *)buf,
576 size, STLINK_READ_TIMEOUT) != size) {
577 LOG_ERROR("bulk trace read failed");
578 return ERROR_FAIL;
579 }
580
581 return ERROR_OK;
582 }
583
584 /*
585 this function writes transfer length in
586 the right place in the cb
587 */
588 static void stlink_usb_set_cbw_transfer_datalength(void *handle, uint32_t size)
589 {
590 struct stlink_usb_handle_s *h = handle;
591
592 buf_set_u32(h->cmdbuf+8, 0, 32, size);
593 }
594
595 static void stlink_usb_xfer_v1_create_cmd(void *handle, uint8_t direction, uint32_t size)
596 {
597 struct stlink_usb_handle_s *h = handle;
598
599 /* fill the send buffer */
600 strcpy((char *)h->cmdbuf, "USBC");
601 h->cmdidx += 4;
602 /* csw tag not used */
603 buf_set_u32(h->cmdbuf+h->cmdidx, 0, 32, 0);
604 h->cmdidx += 4;
605 /* cbw data transfer length (in the following data phase in or out) */
606 buf_set_u32(h->cmdbuf+h->cmdidx, 0, 32, size);
607 h->cmdidx += 4;
608 /* cbw flags */
609 h->cmdbuf[h->cmdidx++] = (direction == h->rx_ep ? ENDPOINT_IN : ENDPOINT_OUT);
610 h->cmdbuf[h->cmdidx++] = 0; /* lun */
611 /* cdb clength (is filled in at xfer) */
612 h->cmdbuf[h->cmdidx++] = 0;
613 }
614
615 /** */
616 static void stlink_usb_init_buffer(void *handle, uint8_t direction, uint32_t size)
617 {
618 struct stlink_usb_handle_s *h = handle;
619
620 h->direction = direction;
621
622 h->cmdidx = 0;
623
624 memset(h->cmdbuf, 0, STLINK_SG_SIZE);
625 memset(h->databuf, 0, STLINK_DATA_SIZE);
626
627 if (h->version.stlink == 1)
628 stlink_usb_xfer_v1_create_cmd(handle, direction, size);
629 }
630
631 /** */
632 static int stlink_usb_version(void *handle)
633 {
634 int res;
635 uint32_t flags;
636 uint16_t v;
637 struct stlink_usb_handle_s *h = handle;
638
639 assert(handle != NULL);
640
641 stlink_usb_init_buffer(handle, h->rx_ep, 6);
642
643 h->cmdbuf[h->cmdidx++] = STLINK_GET_VERSION;
644
645 res = stlink_usb_xfer(handle, h->databuf, 6);
646
647 if (res != ERROR_OK)
648 return res;
649
650 v = (h->databuf[0] << 8) | h->databuf[1];
651
652 h->version.stlink = (v >> 12) & 0x0f;
653 h->version.jtag = (v >> 6) & 0x3f;
654 h->version.swim = v & 0x3f;
655 h->vid = buf_get_u32(h->databuf, 16, 16);
656 h->pid = buf_get_u32(h->databuf, 32, 16);
657
658 flags = 0;
659 switch (h->version.stlink) {
660 case 1:
661 /* ST-LINK/V1 from J11 switch to api-v2 (and support SWD) */
662 if (h->version.jtag >= 11)
663 h->version.jtag_api_max = STLINK_JTAG_API_V2;
664 else
665 h->version.jtag_api_max = STLINK_JTAG_API_V1;
666
667 break;
668 case 2:
669 /* all ST-LINK/V2 and ST-Link/V2.1 use api-v2 */
670 h->version.jtag_api_max = STLINK_JTAG_API_V2;
671
672 /* API for trace from J13 */
673 /* API for target voltage from J13 */
674 if (h->version.jtag >= 13)
675 flags |= STLINK_F_HAS_TRACE;
676
677 break;
678 default:
679 break;
680 }
681 h->version.flags = flags;
682
683 LOG_INFO("STLINK v%d JTAG v%d API v%d SWIM v%d VID 0x%04X PID 0x%04X",
684 h->version.stlink,
685 h->version.jtag,
686 (h->version.jtag_api_max == STLINK_JTAG_API_V1) ? 1 : 2,
687 h->version.swim,
688 h->vid,
689 h->pid);
690
691 return ERROR_OK;
692 }
693
694 static int stlink_usb_check_voltage(void *handle, float *target_voltage)
695 {
696 struct stlink_usb_handle_s *h = handle;
697 uint32_t adc_results[2];
698
699 /* no error message, simply quit with error */
700 if (!(h->version.flags & STLINK_F_HAS_TARGET_VOLT))
701 return ERROR_COMMAND_NOTFOUND;
702
703 stlink_usb_init_buffer(handle, h->rx_ep, 8);
704
705 h->cmdbuf[h->cmdidx++] = STLINK_GET_TARGET_VOLTAGE;
706
707 int result = stlink_usb_xfer(handle, h->databuf, 8);
708
709 if (result != ERROR_OK)
710 return result;
711
712 /* convert result */
713 adc_results[0] = le_to_h_u32(h->databuf);
714 adc_results[1] = le_to_h_u32(h->databuf + 4);
715
716 *target_voltage = 0;
717
718 if (adc_results[0])
719 *target_voltage = 2 * ((float)adc_results[1]) * (float)(1.2 / adc_results[0]);
720
721 LOG_INFO("Target voltage: %f", (double)*target_voltage);
722
723 return ERROR_OK;
724 }
725
726 static int stlink_usb_set_swdclk(void *handle, uint16_t clk_divisor)
727 {
728 struct stlink_usb_handle_s *h = handle;
729
730 assert(handle != NULL);
731
732 /* only supported by stlink/v2 and for firmware >= 22 */
733 if (h->version.stlink == 1 || h->version.jtag < 22)
734 return ERROR_COMMAND_NOTFOUND;
735
736 stlink_usb_init_buffer(handle, h->rx_ep, 2);
737
738 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
739 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_SWD_SET_FREQ;
740 h_u16_to_le(h->cmdbuf+h->cmdidx, clk_divisor);
741 h->cmdidx += 2;
742
743 int result = stlink_cmd_allow_retry(handle, h->databuf, 2);
744
745 if (result != ERROR_OK)
746 return result;
747
748 return ERROR_OK;
749 }
750
751 static int stlink_usb_set_jtagclk(void *handle, uint16_t clk_divisor)
752 {
753 struct stlink_usb_handle_s *h = handle;
754
755 assert(handle != NULL);
756
757 /* only supported by stlink/v2 and for firmware >= 24 */
758 if (h->version.stlink == 1 || h->version.jtag < 24)
759 return ERROR_COMMAND_NOTFOUND;
760
761 stlink_usb_init_buffer(handle, h->rx_ep, 2);
762
763 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
764 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_JTAG_SET_FREQ;
765 h_u16_to_le(h->cmdbuf+h->cmdidx, clk_divisor);
766 h->cmdidx += 2;
767
768 int result = stlink_cmd_allow_retry(handle, h->databuf, 2);
769
770 if (result != ERROR_OK)
771 return result;
772
773 return ERROR_OK;
774 }
775
776 /** */
777 static int stlink_usb_current_mode(void *handle, uint8_t *mode)
778 {
779 int res;
780 struct stlink_usb_handle_s *h = handle;
781
782 assert(handle != NULL);
783
784 stlink_usb_init_buffer(handle, h->rx_ep, 2);
785
786 h->cmdbuf[h->cmdidx++] = STLINK_GET_CURRENT_MODE;
787
788 res = stlink_usb_xfer(handle, h->databuf, 2);
789
790 if (res != ERROR_OK)
791 return res;
792
793 *mode = h->databuf[0];
794
795 return ERROR_OK;
796 }
797
798 /** */
799 static int stlink_usb_mode_enter(void *handle, enum stlink_mode type)
800 {
801 int rx_size = 0;
802 struct stlink_usb_handle_s *h = handle;
803
804 assert(handle != NULL);
805
806 /* on api V2 we are able the read the latest command
807 * status
808 * TODO: we need the test on api V1 too
809 */
810 if (h->jtag_api == STLINK_JTAG_API_V2)
811 rx_size = 2;
812
813 stlink_usb_init_buffer(handle, h->rx_ep, rx_size);
814
815 switch (type) {
816 case STLINK_MODE_DEBUG_JTAG:
817 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
818 if (h->jtag_api == STLINK_JTAG_API_V1)
819 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
820 else
821 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
822 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_JTAG;
823 break;
824 case STLINK_MODE_DEBUG_SWD:
825 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
826 if (h->jtag_api == STLINK_JTAG_API_V1)
827 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
828 else
829 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
830 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_SWD;
831 break;
832 case STLINK_MODE_DEBUG_SWIM:
833 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
834 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_ENTER;
835 /* no answer for this function... */
836 rx_size = 0;
837 break;
838 case STLINK_MODE_DFU:
839 case STLINK_MODE_MASS:
840 default:
841 return ERROR_FAIL;
842 }
843
844 return stlink_cmd_allow_retry(handle, h->databuf, rx_size);
845 }
846
847 /** */
848 static int stlink_usb_mode_leave(void *handle, enum stlink_mode type)
849 {
850 int res;
851 struct stlink_usb_handle_s *h = handle;
852
853 assert(handle != NULL);
854
855 stlink_usb_init_buffer(handle, STLINK_NULL_EP, 0);
856
857 switch (type) {
858 case STLINK_MODE_DEBUG_JTAG:
859 case STLINK_MODE_DEBUG_SWD:
860 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
861 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_EXIT;
862 break;
863 case STLINK_MODE_DEBUG_SWIM:
864 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
865 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_EXIT;
866 break;
867 case STLINK_MODE_DFU:
868 h->cmdbuf[h->cmdidx++] = STLINK_DFU_COMMAND;
869 h->cmdbuf[h->cmdidx++] = STLINK_DFU_EXIT;
870 break;
871 case STLINK_MODE_MASS:
872 default:
873 return ERROR_FAIL;
874 }
875
876 res = stlink_usb_xfer(handle, 0, 0);
877
878 if (res != ERROR_OK)
879 return res;
880
881 return ERROR_OK;
882 }
883
884 static int stlink_usb_assert_srst(void *handle, int srst);
885
886 static enum stlink_mode stlink_get_mode(enum hl_transports t)
887 {
888 switch (t) {
889 case HL_TRANSPORT_SWD:
890 return STLINK_MODE_DEBUG_SWD;
891 case HL_TRANSPORT_JTAG:
892 return STLINK_MODE_DEBUG_JTAG;
893 case HL_TRANSPORT_SWIM:
894 return STLINK_MODE_DEBUG_SWIM;
895 default:
896 return STLINK_MODE_UNKNOWN;
897 }
898 }
899
900 /** */
901 static int stlink_usb_init_mode(void *handle, bool connect_under_reset)
902 {
903 int res;
904 uint8_t mode;
905 enum stlink_mode emode;
906 struct stlink_usb_handle_s *h = handle;
907
908 assert(handle != NULL);
909
910 res = stlink_usb_current_mode(handle, &mode);
911
912 if (res != ERROR_OK)
913 return res;
914
915 LOG_DEBUG("MODE: 0x%02X", mode);
916
917 /* try to exit current mode */
918 switch (mode) {
919 case STLINK_DEV_DFU_MODE:
920 emode = STLINK_MODE_DFU;
921 break;
922 case STLINK_DEV_DEBUG_MODE:
923 emode = STLINK_MODE_DEBUG_SWD;
924 break;
925 case STLINK_DEV_SWIM_MODE:
926 emode = STLINK_MODE_DEBUG_SWIM;
927 break;
928 case STLINK_DEV_BOOTLOADER_MODE:
929 case STLINK_DEV_MASS_MODE:
930 default:
931 emode = STLINK_MODE_UNKNOWN;
932 break;
933 }
934
935 if (emode != STLINK_MODE_UNKNOWN) {
936 res = stlink_usb_mode_leave(handle, emode);
937
938 if (res != ERROR_OK)
939 return res;
940 }
941
942 res = stlink_usb_current_mode(handle, &mode);
943
944 if (res != ERROR_OK)
945 return res;
946
947 /* we check the target voltage here as an aid to debugging connection problems.
948 * the stlink requires the target Vdd to be connected for reliable debugging.
949 * this cmd is supported in all modes except DFU
950 */
951 if (mode != STLINK_DEV_DFU_MODE) {
952
953 float target_voltage;
954
955 /* check target voltage (if supported) */
956 res = stlink_usb_check_voltage(h, &target_voltage);
957
958 if (res != ERROR_OK) {
959 if (res != ERROR_COMMAND_NOTFOUND)
960 LOG_ERROR("voltage check failed");
961 /* attempt to continue as it is not a catastrophic failure */
962 } else {
963 /* check for a sensible target voltage, operating range is 1.65-5.5v
964 * according to datasheet */
965 if (target_voltage < 1.5)
966 LOG_ERROR("target voltage may be too low for reliable debugging");
967 }
968 }
969
970 LOG_DEBUG("MODE: 0x%02X", mode);
971
972 /* set selected mode */
973 emode = stlink_get_mode(h->transport);
974
975 if (emode == STLINK_MODE_UNKNOWN) {
976 LOG_ERROR("selected mode (transport) not supported");
977 return ERROR_FAIL;
978 }
979
980 /* preliminary SRST assert:
981 * We want SRST is asserted before activating debug signals (mode_enter).
982 * As the required mode has not been set, the adapter may not know what pin to use.
983 * Tested firmware STLINK v2 JTAG v29 API v2 SWIM v0 uses T_NRST pin by default
984 * Tested firmware STLINK v2 JTAG v27 API v2 SWIM v6 uses T_NRST pin by default
985 * after power on, SWIM_RST stays unchanged */
986 if (connect_under_reset && emode != STLINK_MODE_DEBUG_SWIM)
987 stlink_usb_assert_srst(handle, 0);
988 /* do not check the return status here, we will
989 proceed and enter the desired mode below
990 and try asserting srst again. */
991
992 res = stlink_usb_mode_enter(handle, emode);
993 if (res != ERROR_OK)
994 return res;
995
996 /* assert SRST again: a little bit late but now the adapter knows for sure what pin to use */
997 if (connect_under_reset) {
998 res = stlink_usb_assert_srst(handle, 0);
999 if (res != ERROR_OK)
1000 return res;
1001 }
1002
1003 res = stlink_usb_current_mode(handle, &mode);
1004
1005 if (res != ERROR_OK)
1006 return res;
1007
1008 LOG_DEBUG("MODE: 0x%02X", mode);
1009
1010 return ERROR_OK;
1011 }
1012
1013 /* request status from last swim request */
1014 static int stlink_swim_status(void *handle)
1015 {
1016 struct stlink_usb_handle_s *h = handle;
1017 int res;
1018
1019 stlink_usb_init_buffer(handle, h->rx_ep, 4);
1020 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1021 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_READSTATUS;
1022 res = stlink_usb_xfer(handle, h->databuf, 4);
1023 if (res != ERROR_OK)
1024 return res;
1025 return ERROR_OK;
1026 }
1027 /*
1028 the purpose of this function is unknown...
1029 capabilites? anyway for swim v6 it returns
1030 0001020600000000
1031 */
1032 __attribute__((unused))
1033 static int stlink_swim_cap(void *handle, uint8_t *cap)
1034 {
1035 struct stlink_usb_handle_s *h = handle;
1036 int res;
1037
1038 stlink_usb_init_buffer(handle, h->rx_ep, 8);
1039 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1040 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_READ_CAP;
1041 h->cmdbuf[h->cmdidx++] = 0x01;
1042 res = stlink_usb_xfer(handle, h->databuf, 8);
1043 if (res != ERROR_OK)
1044 return res;
1045 memcpy(cap, h->databuf, 8);
1046 return ERROR_OK;
1047 }
1048
1049 /* debug dongle assert/deassert sreset line */
1050 static int stlink_swim_assert_reset(void *handle, int reset)
1051 {
1052 struct stlink_usb_handle_s *h = handle;
1053 int res;
1054
1055 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1056 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1057 if (!reset)
1058 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_ASSERT_RESET;
1059 else
1060 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_DEASSERT_RESET;
1061 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1062 if (res != ERROR_OK)
1063 return res;
1064 return ERROR_OK;
1065 }
1066
1067 /*
1068 send swim enter seq
1069 1.3ms low then 750Hz then 1.5kHz
1070 */
1071 static int stlink_swim_enter(void *handle)
1072 {
1073 struct stlink_usb_handle_s *h = handle;
1074 int res;
1075
1076 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1077 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1078 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_ENTER_SEQ;
1079 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1080 if (res != ERROR_OK)
1081 return res;
1082 return ERROR_OK;
1083 }
1084
1085 /* switch high/low speed swim */
1086 static int stlink_swim_speed(void *handle, int speed)
1087 {
1088 struct stlink_usb_handle_s *h = handle;
1089 int res;
1090
1091 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1092 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1093 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_SPEED;
1094 if (speed)
1095 h->cmdbuf[h->cmdidx++] = 1;
1096 else
1097 h->cmdbuf[h->cmdidx++] = 0;
1098 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1099 if (res != ERROR_OK)
1100 return res;
1101 return ERROR_OK;
1102 }
1103
1104 /*
1105 initiate srst from swim.
1106 nrst is pulled low for 50us.
1107 */
1108 static int stlink_swim_generate_rst(void *handle)
1109 {
1110 struct stlink_usb_handle_s *h = handle;
1111 int res;
1112
1113 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1114 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1115 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_GEN_RST;
1116 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1117 if (res != ERROR_OK)
1118 return res;
1119 return ERROR_OK;
1120 }
1121
1122 /*
1123 send resyncronize sequence
1124 swim is pulled low for 16us
1125 reply is 64 clks low
1126 */
1127 static int stlink_swim_resync(void *handle)
1128 {
1129 struct stlink_usb_handle_s *h = handle;
1130 int res;
1131
1132 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1133 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1134 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_RESET;
1135 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1136 if (res != ERROR_OK)
1137 return res;
1138 return ERROR_OK;
1139 }
1140
1141 static int stlink_swim_writebytes(void *handle, uint32_t addr, uint32_t len, const uint8_t *data)
1142 {
1143 struct stlink_usb_handle_s *h = handle;
1144 int res;
1145 unsigned int i;
1146 unsigned int datalen = 0;
1147 int cmdsize = STLINK_CMD_SIZE_V2;
1148
1149 if (len > STLINK_DATA_SIZE)
1150 return ERROR_FAIL;
1151
1152 if (h->version.stlink == 1)
1153 cmdsize = STLINK_SG_SIZE;
1154
1155 stlink_usb_init_buffer(handle, h->tx_ep, 0);
1156 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1157 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_WRITEMEM;
1158 h_u16_to_be(h->cmdbuf+h->cmdidx, len);
1159 h->cmdidx += 2;
1160 h_u32_to_be(h->cmdbuf+h->cmdidx, addr);
1161 h->cmdidx += 4;
1162 for (i = 0; i < len; i++) {
1163 if (h->cmdidx == cmdsize)
1164 h->databuf[datalen++] = *(data++);
1165 else
1166 h->cmdbuf[h->cmdidx++] = *(data++);
1167 }
1168 if (h->version.stlink == 1)
1169 stlink_usb_set_cbw_transfer_datalength(handle, datalen);
1170
1171 res = stlink_cmd_allow_retry(handle, h->databuf, datalen);
1172 if (res != ERROR_OK)
1173 return res;
1174 return ERROR_OK;
1175 }
1176
1177 static int stlink_swim_readbytes(void *handle, uint32_t addr, uint32_t len, uint8_t *data)
1178 {
1179 struct stlink_usb_handle_s *h = handle;
1180 int res;
1181
1182 if (len > STLINK_DATA_SIZE)
1183 return ERROR_FAIL;
1184
1185 stlink_usb_init_buffer(handle, h->rx_ep, 0);
1186 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1187 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_READMEM;
1188 h_u16_to_be(h->cmdbuf+h->cmdidx, len);
1189 h->cmdidx += 2;
1190 h_u32_to_be(h->cmdbuf+h->cmdidx, addr);
1191 h->cmdidx += 4;
1192 res = stlink_cmd_allow_retry(handle, h->databuf, 0);
1193 if (res != ERROR_OK)
1194 return res;
1195
1196 stlink_usb_init_buffer(handle, h->rx_ep, len);
1197 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
1198 h->cmdbuf[h->cmdidx++] = STLINK_SWIM_READBUF;
1199 res = stlink_usb_xfer(handle, data, len);
1200 if (res != ERROR_OK)
1201 return res;
1202
1203 return ERROR_OK;
1204 }
1205
1206 /** */
1207 static int stlink_usb_idcode(void *handle, uint32_t *idcode)
1208 {
1209 int res;
1210 struct stlink_usb_handle_s *h = handle;
1211
1212 assert(handle != NULL);
1213
1214 /* there is no swim read core id cmd */
1215 if (h->transport == HL_TRANSPORT_SWIM) {
1216 *idcode = 0;
1217 return ERROR_OK;
1218 }
1219
1220 stlink_usb_init_buffer(handle, h->rx_ep, 4);
1221
1222 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1223 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READCOREID;
1224
1225 res = stlink_usb_xfer(handle, h->databuf, 4);
1226
1227 if (res != ERROR_OK)
1228 return res;
1229
1230 *idcode = le_to_h_u32(h->databuf);
1231
1232 LOG_DEBUG("IDCODE: 0x%08" PRIX32, *idcode);
1233
1234 return ERROR_OK;
1235 }
1236
1237 static int stlink_usb_v2_read_debug_reg(void *handle, uint32_t addr, uint32_t *val)
1238 {
1239 struct stlink_usb_handle_s *h = handle;
1240 int res;
1241
1242 assert(handle != NULL);
1243
1244 stlink_usb_init_buffer(handle, h->rx_ep, 8);
1245
1246 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1247 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READDEBUGREG;
1248 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1249 h->cmdidx += 4;
1250
1251 res = stlink_cmd_allow_retry(handle, h->databuf, 8);
1252 if (res != ERROR_OK)
1253 return res;
1254
1255 *val = le_to_h_u32(h->databuf + 4);
1256 return ERROR_OK;
1257 }
1258
1259 static int stlink_usb_write_debug_reg(void *handle, uint32_t addr, uint32_t val)
1260 {
1261 struct stlink_usb_handle_s *h = handle;
1262
1263 assert(handle != NULL);
1264
1265 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1266
1267 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1268 if (h->jtag_api == STLINK_JTAG_API_V1)
1269 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEDEBUGREG;
1270 else
1271 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEDEBUGREG;
1272 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1273 h->cmdidx += 4;
1274 h_u32_to_le(h->cmdbuf+h->cmdidx, val);
1275 h->cmdidx += 4;
1276
1277 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1278 }
1279
1280 /** */
1281 static int stlink_usb_trace_read(void *handle, uint8_t *buf, size_t *size)
1282 {
1283 struct stlink_usb_handle_s *h = handle;
1284
1285 assert(handle != NULL);
1286
1287 if (h->trace.enabled && (h->version.flags & STLINK_F_HAS_TRACE)) {
1288 int res;
1289
1290 stlink_usb_init_buffer(handle, h->rx_ep, 10);
1291
1292 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1293 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GET_TRACE_NB;
1294
1295 res = stlink_usb_xfer(handle, h->databuf, 2);
1296 if (res != ERROR_OK)
1297 return res;
1298
1299 size_t bytes_avail = le_to_h_u16(h->databuf);
1300 *size = bytes_avail < *size ? bytes_avail : *size - 1;
1301
1302 if (*size > 0) {
1303 res = stlink_usb_read_trace(handle, buf, *size);
1304 if (res != ERROR_OK)
1305 return res;
1306 return ERROR_OK;
1307 }
1308 }
1309 *size = 0;
1310 return ERROR_OK;
1311 }
1312
1313 static enum target_state stlink_usb_v2_get_status(void *handle)
1314 {
1315 int result;
1316 uint32_t status;
1317
1318 result = stlink_usb_v2_read_debug_reg(handle, DCB_DHCSR, &status);
1319 if (result != ERROR_OK)
1320 return TARGET_UNKNOWN;
1321
1322 if (status & S_HALT)
1323 return TARGET_HALTED;
1324 else if (status & S_RESET_ST)
1325 return TARGET_RESET;
1326
1327 return TARGET_RUNNING;
1328 }
1329
1330 /** */
1331 static enum target_state stlink_usb_state(void *handle)
1332 {
1333 int res;
1334 struct stlink_usb_handle_s *h = handle;
1335
1336 assert(handle != NULL);
1337
1338 if (h->transport == HL_TRANSPORT_SWIM) {
1339 res = stlink_usb_mode_enter(handle, stlink_get_mode(h->transport));
1340 if (res != ERROR_OK)
1341 return TARGET_UNKNOWN;
1342
1343 res = stlink_swim_resync(handle);
1344 if (res != ERROR_OK)
1345 return TARGET_UNKNOWN;
1346
1347 return ERROR_OK;
1348 }
1349
1350 if (h->reconnect_pending) {
1351 LOG_INFO("Previous state query failed, trying to reconnect");
1352 res = stlink_usb_mode_enter(handle, stlink_get_mode(h->transport));
1353
1354 if (res != ERROR_OK)
1355 return TARGET_UNKNOWN;
1356
1357 h->reconnect_pending = false;
1358 }
1359
1360 if (h->jtag_api == STLINK_JTAG_API_V2) {
1361 res = stlink_usb_v2_get_status(handle);
1362 if (res == TARGET_UNKNOWN)
1363 h->reconnect_pending = true;
1364 return res;
1365 }
1366
1367 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1368
1369 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1370 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_GETSTATUS;
1371
1372 res = stlink_usb_xfer(handle, h->databuf, 2);
1373
1374 if (res != ERROR_OK)
1375 return TARGET_UNKNOWN;
1376
1377 if (h->databuf[0] == STLINK_CORE_RUNNING)
1378 return TARGET_RUNNING;
1379 if (h->databuf[0] == STLINK_CORE_HALTED)
1380 return TARGET_HALTED;
1381
1382 h->reconnect_pending = true;
1383
1384 return TARGET_UNKNOWN;
1385 }
1386
1387 static int stlink_usb_assert_srst(void *handle, int srst)
1388 {
1389 struct stlink_usb_handle_s *h = handle;
1390
1391 assert(handle != NULL);
1392
1393 if (h->transport == HL_TRANSPORT_SWIM)
1394 return stlink_swim_assert_reset(handle, srst);
1395
1396 if (h->version.stlink == 1)
1397 return ERROR_COMMAND_NOTFOUND;
1398
1399 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1400
1401 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1402 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_DRIVE_NRST;
1403 h->cmdbuf[h->cmdidx++] = srst;
1404
1405 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1406 }
1407
1408 /** */
1409 static void stlink_usb_trace_disable(void *handle)
1410 {
1411 int res = ERROR_OK;
1412 struct stlink_usb_handle_s *h = handle;
1413
1414 assert(handle != NULL);
1415
1416 assert(h->version.flags & STLINK_F_HAS_TRACE);
1417
1418 LOG_DEBUG("Tracing: disable");
1419
1420 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1421 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1422 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_STOP_TRACE_RX;
1423 res = stlink_usb_xfer(handle, h->databuf, 2);
1424
1425 if (res == ERROR_OK)
1426 h->trace.enabled = false;
1427 }
1428
1429
1430 /** */
1431 static int stlink_usb_trace_enable(void *handle)
1432 {
1433 int res;
1434 struct stlink_usb_handle_s *h = handle;
1435
1436 assert(handle != NULL);
1437
1438 if (h->version.flags & STLINK_F_HAS_TRACE) {
1439 stlink_usb_init_buffer(handle, h->rx_ep, 10);
1440
1441 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1442 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_START_TRACE_RX;
1443 h_u16_to_le(h->cmdbuf+h->cmdidx, (uint16_t)STLINK_TRACE_SIZE);
1444 h->cmdidx += 2;
1445 h_u32_to_le(h->cmdbuf+h->cmdidx, h->trace.source_hz);
1446 h->cmdidx += 4;
1447
1448 res = stlink_usb_xfer(handle, h->databuf, 2);
1449
1450 if (res == ERROR_OK) {
1451 h->trace.enabled = true;
1452 LOG_DEBUG("Tracing: recording at %" PRIu32 "Hz", h->trace.source_hz);
1453 }
1454 } else {
1455 LOG_ERROR("Tracing is not supported by this version.");
1456 res = ERROR_FAIL;
1457 }
1458
1459 return res;
1460 }
1461
1462 /** */
1463 static int stlink_usb_reset(void *handle)
1464 {
1465 struct stlink_usb_handle_s *h = handle;
1466 int retval;
1467
1468 assert(handle != NULL);
1469
1470 if (h->transport == HL_TRANSPORT_SWIM)
1471 return stlink_swim_generate_rst(handle);
1472
1473 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1474
1475 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1476
1477 if (h->jtag_api == STLINK_JTAG_API_V1)
1478 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_RESETSYS;
1479 else
1480 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_RESETSYS;
1481
1482 retval = stlink_cmd_allow_retry(handle, h->databuf, 2);
1483 if (retval != ERROR_OK)
1484 return retval;
1485
1486 if (h->trace.enabled) {
1487 stlink_usb_trace_disable(h);
1488 return stlink_usb_trace_enable(h);
1489 }
1490
1491 return ERROR_OK;
1492 }
1493
1494 /** */
1495 static int stlink_usb_run(void *handle)
1496 {
1497 int res;
1498 struct stlink_usb_handle_s *h = handle;
1499
1500 assert(handle != NULL);
1501
1502 if (h->jtag_api == STLINK_JTAG_API_V2) {
1503 res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_DEBUGEN);
1504
1505 return res;
1506 }
1507
1508 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1509
1510 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1511 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_RUNCORE;
1512
1513 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1514 }
1515
1516 /** */
1517 static int stlink_usb_halt(void *handle)
1518 {
1519 int res;
1520 struct stlink_usb_handle_s *h = handle;
1521
1522 assert(handle != NULL);
1523
1524 if (h->jtag_api == STLINK_JTAG_API_V2) {
1525 res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
1526
1527 return res;
1528 }
1529
1530 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1531
1532 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1533 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_FORCEDEBUG;
1534
1535 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1536 }
1537
1538 /** */
1539 static int stlink_usb_step(void *handle)
1540 {
1541 struct stlink_usb_handle_s *h = handle;
1542
1543 assert(handle != NULL);
1544
1545 if (h->jtag_api == STLINK_JTAG_API_V2) {
1546 /* TODO: this emulates the v1 api, it should really use a similar auto mask isr
1547 * that the Cortex-M3 currently does. */
1548 stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_MASKINTS|C_DEBUGEN);
1549 stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_STEP|C_MASKINTS|C_DEBUGEN);
1550 return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
1551 }
1552
1553 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1554
1555 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1556 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_STEPCORE;
1557
1558 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1559 }
1560
1561 /** */
1562 static int stlink_usb_read_regs(void *handle)
1563 {
1564 int res;
1565 struct stlink_usb_handle_s *h = handle;
1566
1567 assert(handle != NULL);
1568
1569 stlink_usb_init_buffer(handle, h->rx_ep, 84);
1570
1571 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1572 if (h->jtag_api == STLINK_JTAG_API_V1)
1573 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READALLREGS;
1574 else
1575 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READALLREGS;
1576
1577 res = stlink_usb_xfer(handle, h->databuf, 84);
1578
1579 if (res != ERROR_OK)
1580 return res;
1581
1582 return ERROR_OK;
1583 }
1584
1585 /** */
1586 static int stlink_usb_read_reg(void *handle, int num, uint32_t *val)
1587 {
1588 int res;
1589 struct stlink_usb_handle_s *h = handle;
1590
1591 assert(handle != NULL);
1592
1593 stlink_usb_init_buffer(handle, h->rx_ep, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
1594
1595 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1596 if (h->jtag_api == STLINK_JTAG_API_V1)
1597 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READREG;
1598 else
1599 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READREG;
1600 h->cmdbuf[h->cmdidx++] = num;
1601
1602 if (h->jtag_api == STLINK_JTAG_API_V1) {
1603 res = stlink_usb_xfer(handle, h->databuf, 4);
1604 if (res != ERROR_OK)
1605 return res;
1606 *val = le_to_h_u32(h->databuf);
1607 return ERROR_OK;
1608 } else {
1609 res = stlink_cmd_allow_retry(handle, h->databuf, 8);
1610 if (res != ERROR_OK)
1611 return res;
1612 *val = le_to_h_u32(h->databuf + 4);
1613 return ERROR_OK;
1614 }
1615 }
1616
1617 /** */
1618 static int stlink_usb_write_reg(void *handle, int num, uint32_t val)
1619 {
1620 struct stlink_usb_handle_s *h = handle;
1621
1622 assert(handle != NULL);
1623
1624 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1625
1626 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1627 if (h->jtag_api == STLINK_JTAG_API_V1)
1628 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEREG;
1629 else
1630 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEREG;
1631 h->cmdbuf[h->cmdidx++] = num;
1632 h_u32_to_le(h->cmdbuf+h->cmdidx, val);
1633 h->cmdidx += 4;
1634
1635 return stlink_cmd_allow_retry(handle, h->databuf, 2);
1636 }
1637
1638 static int stlink_usb_get_rw_status(void *handle)
1639 {
1640 int res;
1641 struct stlink_usb_handle_s *h = handle;
1642
1643 assert(handle != NULL);
1644
1645 if (h->jtag_api == STLINK_JTAG_API_V1)
1646 return ERROR_OK;
1647
1648 stlink_usb_init_buffer(handle, h->rx_ep, 2);
1649
1650 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1651 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GETLASTRWSTATUS;
1652
1653 res = stlink_usb_xfer(handle, h->databuf, 2);
1654
1655 if (res != ERROR_OK)
1656 return res;
1657
1658 return stlink_usb_error_check(h);
1659 }
1660
1661 /** */
1662 static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
1663 uint8_t *buffer)
1664 {
1665 int res;
1666 uint16_t read_len = len;
1667 struct stlink_usb_handle_s *h = handle;
1668
1669 assert(handle != NULL);
1670
1671 /* max 8bit read/write is 64bytes */
1672 if (len > STLINK_MAX_RW8) {
1673 LOG_DEBUG("max buffer length exceeded");
1674 return ERROR_FAIL;
1675 }
1676
1677 stlink_usb_init_buffer(handle, h->rx_ep, read_len);
1678
1679 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1680 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
1681 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1682 h->cmdidx += 4;
1683 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1684 h->cmdidx += 2;
1685
1686 /* we need to fix read length for single bytes */
1687 if (read_len == 1)
1688 read_len++;
1689
1690 res = stlink_usb_xfer(handle, h->databuf, read_len);
1691
1692 if (res != ERROR_OK)
1693 return res;
1694
1695 memcpy(buffer, h->databuf, len);
1696
1697 return stlink_usb_get_rw_status(handle);
1698 }
1699
1700 /** */
1701 static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
1702 const uint8_t *buffer)
1703 {
1704 int res;
1705 struct stlink_usb_handle_s *h = handle;
1706
1707 assert(handle != NULL);
1708
1709 /* max 8bit read/write is 64bytes */
1710 if (len > STLINK_MAX_RW8) {
1711 LOG_DEBUG("max buffer length exceeded");
1712 return ERROR_FAIL;
1713 }
1714
1715 stlink_usb_init_buffer(handle, h->tx_ep, len);
1716
1717 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1718 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_8BIT;
1719 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1720 h->cmdidx += 4;
1721 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1722 h->cmdidx += 2;
1723
1724 res = stlink_usb_xfer(handle, buffer, len);
1725
1726 if (res != ERROR_OK)
1727 return res;
1728
1729 return stlink_usb_get_rw_status(handle);
1730 }
1731
1732 /** */
1733 static int stlink_usb_read_mem16(void *handle, uint32_t addr, uint16_t len,
1734 uint8_t *buffer)
1735 {
1736 int res;
1737 struct stlink_usb_handle_s *h = handle;
1738
1739 assert(handle != NULL);
1740
1741 /* only supported by stlink/v2 and for firmware >= 26 */
1742 if (h->jtag_api == STLINK_JTAG_API_V1 ||
1743 (h->jtag_api == STLINK_JTAG_API_V2 && h->version.jtag < 26))
1744 return ERROR_COMMAND_NOTFOUND;
1745
1746 /* data must be a multiple of 2 and half-word aligned */
1747 if (len % 2 || addr % 2) {
1748 LOG_DEBUG("Invalid data alignment");
1749 return ERROR_TARGET_UNALIGNED_ACCESS;
1750 }
1751
1752 stlink_usb_init_buffer(handle, h->rx_ep, len);
1753
1754 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1755 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READMEM_16BIT;
1756 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1757 h->cmdidx += 4;
1758 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1759 h->cmdidx += 2;
1760
1761 res = stlink_usb_xfer(handle, h->databuf, len);
1762
1763 if (res != ERROR_OK)
1764 return res;
1765
1766 memcpy(buffer, h->databuf, len);
1767
1768 return stlink_usb_get_rw_status(handle);
1769 }
1770
1771 /** */
1772 static int stlink_usb_write_mem16(void *handle, uint32_t addr, uint16_t len,
1773 const uint8_t *buffer)
1774 {
1775 int res;
1776 struct stlink_usb_handle_s *h = handle;
1777
1778 assert(handle != NULL);
1779
1780 /* only supported by stlink/v2 and for firmware >= 26 */
1781 if (h->jtag_api == STLINK_JTAG_API_V1 ||
1782 (h->jtag_api == STLINK_JTAG_API_V2 && h->version.jtag < 26))
1783 return ERROR_COMMAND_NOTFOUND;
1784
1785 /* data must be a multiple of 2 and half-word aligned */
1786 if (len % 2 || addr % 2) {
1787 LOG_DEBUG("Invalid data alignment");
1788 return ERROR_TARGET_UNALIGNED_ACCESS;
1789 }
1790
1791 stlink_usb_init_buffer(handle, h->tx_ep, len);
1792
1793 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1794 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEMEM_16BIT;
1795 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1796 h->cmdidx += 4;
1797 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1798 h->cmdidx += 2;
1799
1800 res = stlink_usb_xfer(handle, buffer, len);
1801
1802 if (res != ERROR_OK)
1803 return res;
1804
1805 return stlink_usb_get_rw_status(handle);
1806 }
1807
1808 /** */
1809 static int stlink_usb_read_mem32(void *handle, uint32_t addr, uint16_t len,
1810 uint8_t *buffer)
1811 {
1812 int res;
1813 struct stlink_usb_handle_s *h = handle;
1814
1815 assert(handle != NULL);
1816
1817 /* data must be a multiple of 4 and word aligned */
1818 if (len % 4 || addr % 4) {
1819 LOG_DEBUG("Invalid data alignment");
1820 return ERROR_TARGET_UNALIGNED_ACCESS;
1821 }
1822
1823 stlink_usb_init_buffer(handle, h->rx_ep, len);
1824
1825 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1826 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_32BIT;
1827 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1828 h->cmdidx += 4;
1829 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1830 h->cmdidx += 2;
1831
1832 res = stlink_usb_xfer(handle, h->databuf, len);
1833
1834 if (res != ERROR_OK)
1835 return res;
1836
1837 memcpy(buffer, h->databuf, len);
1838
1839 return stlink_usb_get_rw_status(handle);
1840 }
1841
1842 /** */
1843 static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
1844 const uint8_t *buffer)
1845 {
1846 int res;
1847 struct stlink_usb_handle_s *h = handle;
1848
1849 assert(handle != NULL);
1850
1851 /* data must be a multiple of 4 and word aligned */
1852 if (len % 4 || addr % 4) {
1853 LOG_DEBUG("Invalid data alignment");
1854 return ERROR_TARGET_UNALIGNED_ACCESS;
1855 }
1856
1857 stlink_usb_init_buffer(handle, h->tx_ep, len);
1858
1859 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
1860 h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
1861 h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
1862 h->cmdidx += 4;
1863 h_u16_to_le(h->cmdbuf+h->cmdidx, len);
1864 h->cmdidx += 2;
1865
1866 res = stlink_usb_xfer(handle, buffer, len);
1867
1868 if (res != ERROR_OK)
1869 return res;
1870
1871 return stlink_usb_get_rw_status(handle);
1872 }
1873
1874 static uint32_t stlink_max_block_size(uint32_t tar_autoincr_block, uint32_t address)
1875 {
1876 uint32_t max_tar_block = (tar_autoincr_block - ((tar_autoincr_block - 1) & address));
1877 if (max_tar_block == 0)
1878 max_tar_block = 4;
1879 return max_tar_block;
1880 }
1881
1882 static int stlink_usb_read_mem(void *handle, uint32_t addr, uint32_t size,
1883 uint32_t count, uint8_t *buffer)
1884 {
1885 int retval = ERROR_OK;
1886 uint32_t bytes_remaining;
1887 int retries = 0;
1888 struct stlink_usb_handle_s *h = handle;
1889
1890 /* calculate byte count */
1891 count *= size;
1892
1893 /* switch to 8 bit if stlink does not support 16 bit memory read */
1894 if (size == 2 && (h->jtag_api == STLINK_JTAG_API_V1 ||
1895 (h->jtag_api == STLINK_JTAG_API_V2 && h->version.jtag < 26)))
1896 size = 1;
1897
1898 while (count) {
1899
1900 bytes_remaining = (size != 1) ? \
1901 stlink_max_block_size(h->max_mem_packet, addr) : STLINK_MAX_RW8;
1902
1903 if (count < bytes_remaining)
1904 bytes_remaining = count;
1905
1906 if (h->transport == HL_TRANSPORT_SWIM) {
1907 retval = stlink_swim_readbytes(handle, addr, bytes_remaining, buffer);
1908 if (retval != ERROR_OK)
1909 return retval;
1910 } else
1911 /*
1912 * all stlink support 8/32bit memory read/writes and only from
1913 * stlink V2J26 there is support for 16 bit memory read/write.
1914 * Honour 32 bit and, if possible, 16 bit too. Otherwise, handle
1915 * as 8bit access.
1916 */
1917 if (size != 1) {
1918
1919 /* When in jtag mode the stlink uses the auto-increment functionality.
1920 * However it expects us to pass the data correctly, this includes
1921 * alignment and any page boundaries. We already do this as part of the
1922 * adi_v5 implementation, but the stlink is a hla adapter and so this
1923 * needs implementing manually.
1924 * currently this only affects jtag mode, according to ST they do single
1925 * access in SWD mode - but this may change and so we do it for both modes */
1926
1927 /* we first need to check for any unaligned bytes */
1928 if (addr & (size - 1)) {
1929
1930 uint32_t head_bytes = size - (addr & (size - 1));
1931 retval = stlink_usb_read_mem8(handle, addr, head_bytes, buffer);
1932 if (retval == ERROR_WAIT && retries < MAX_WAIT_RETRIES) {
1933 usleep((1<<retries++) * 1000);
1934 continue;
1935 }
1936 if (retval != ERROR_OK)
1937 return retval;
1938 buffer += head_bytes;
1939 addr += head_bytes;
1940 count -= head_bytes;
1941 bytes_remaining -= head_bytes;
1942 }
1943
1944 if (bytes_remaining & (size - 1))
1945 retval = stlink_usb_read_mem(handle, addr, 1, bytes_remaining, buffer);
1946 else if (size == 2)
1947 retval = stlink_usb_read_mem16(handle, addr, bytes_remaining, buffer);
1948 else
1949 retval = stlink_usb_read_mem32(handle, addr, bytes_remaining, buffer);
1950 } else
1951 retval = stlink_usb_read_mem8(handle, addr, bytes_remaining, buffer);
1952
1953 if (retval == ERROR_WAIT && retries < MAX_WAIT_RETRIES) {
1954 usleep((1<<retries++) * 1000);
1955 continue;
1956 }
1957 if (retval != ERROR_OK)
1958 return retval;
1959
1960 buffer += bytes_remaining;
1961 addr += bytes_remaining;
1962 count -= bytes_remaining;
1963 }
1964
1965 return retval;
1966 }
1967
1968 static int stlink_usb_write_mem(void *handle, uint32_t addr, uint32_t size,
1969 uint32_t count, const uint8_t *buffer)
1970 {
1971 int retval = ERROR_OK;
1972 uint32_t bytes_remaining;
1973 int retries = 0;
1974 struct stlink_usb_handle_s *h = handle;
1975
1976 /* calculate byte count */
1977 count *= size;
1978
1979 /* switch to 8 bit if stlink does not support 16 bit memory read */
1980 if (size == 2 && (h->jtag_api == STLINK_JTAG_API_V1 ||
1981 (h->jtag_api == STLINK_JTAG_API_V2 && h->version.jtag < 26)))
1982 size = 1;
1983
1984 while (count) {
1985
1986 bytes_remaining = (size != 1) ? \
1987 stlink_max_block_size(h->max_mem_packet, addr) : STLINK_MAX_RW8;
1988
1989 if (count < bytes_remaining)
1990 bytes_remaining = count;
1991
1992 if (h->transport == HL_TRANSPORT_SWIM) {
1993 retval = stlink_swim_writebytes(handle, addr, bytes_remaining, buffer);
1994 if (retval != ERROR_OK)
1995 return retval;
1996 } else
1997 /*
1998 * all stlink support 8/32bit memory read/writes and only from
1999 * stlink V2J26 there is support for 16 bit memory read/write.
2000 * Honour 32 bit and, if possible, 16 bit too. Otherwise, handle
2001 * as 8bit access.
2002 */
2003 if (size != 1) {
2004
2005 /* When in jtag mode the stlink uses the auto-increment functionality.
2006 * However it expects us to pass the data correctly, this includes
2007 * alignment and any page boundaries. We already do this as part of the
2008 * adi_v5 implementation, but the stlink is a hla adapter and so this
2009 * needs implementing manually.
2010 * currently this only affects jtag mode, according to ST they do single
2011 * access in SWD mode - but this may change and so we do it for both modes */
2012
2013 /* we first need to check for any unaligned bytes */
2014 if (addr & (size - 1)) {
2015
2016 uint32_t head_bytes = size - (addr & (size - 1));
2017 retval = stlink_usb_write_mem8(handle, addr, head_bytes, buffer);
2018 if (retval == ERROR_WAIT && retries < MAX_WAIT_RETRIES) {
2019 usleep((1<<retries++) * 1000);
2020 continue;
2021 }
2022 if (retval != ERROR_OK)
2023 return retval;
2024 buffer += head_bytes;
2025 addr += head_bytes;
2026 count -= head_bytes;
2027 bytes_remaining -= head_bytes;
2028 }
2029
2030 if (bytes_remaining & (size - 1))
2031 retval = stlink_usb_write_mem(handle, addr, 1, bytes_remaining, buffer);
2032 else if (size == 2)
2033 retval = stlink_usb_write_mem16(handle, addr, bytes_remaining, buffer);
2034 else
2035 retval = stlink_usb_write_mem32(handle, addr, bytes_remaining, buffer);
2036
2037 } else
2038 retval = stlink_usb_write_mem8(handle, addr, bytes_remaining, buffer);
2039 if (retval == ERROR_WAIT && retries < MAX_WAIT_RETRIES) {
2040 usleep((1<<retries++) * 1000);
2041 continue;
2042 }
2043 if (retval != ERROR_OK)
2044 return retval;
2045
2046 buffer += bytes_remaining;
2047 addr += bytes_remaining;
2048 count -= bytes_remaining;
2049 }
2050
2051 return retval;
2052 }
2053
2054 /** */
2055 static int stlink_usb_override_target(const char *targetname)
2056 {
2057 return !strcmp(targetname, "cortex_m");
2058 }
2059
2060 static int stlink_speed_swim(void *handle, int khz, bool query)
2061 {
2062 /*
2063 we dont care what the khz rate is
2064 we only have low and high speed...
2065 before changing speed the SWIM_CSR HS bit
2066 must be updated
2067 */
2068 if (khz == 0)
2069 stlink_swim_speed(handle, 0);
2070 else
2071 stlink_swim_speed(handle, 1);
2072 return khz;
2073 }
2074
2075 static int stlink_match_speed_map(const struct speed_map *map, unsigned int map_size, int khz, bool query)
2076 {
2077 unsigned int i;
2078 int speed_index = -1;
2079 int speed_diff = INT_MAX;
2080 bool match = true;
2081
2082 for (i = 0; i < map_size; i++) {
2083 if (khz == map[i].speed) {
2084 speed_index = i;
2085 break;
2086 } else {
2087 int current_diff = khz - map[i].speed;
2088 /* get abs value for comparison */
2089 current_diff = (current_diff > 0) ? current_diff : -current_diff;
2090 if ((current_diff < speed_diff) && khz >= map[i].speed) {
2091 speed_diff = current_diff;
2092 speed_index = i;
2093 }
2094 }
2095 }
2096
2097 if (speed_index == -1) {
2098 /* this will only be here if we cannot match the slow speed.
2099 * use the slowest speed we support.*/
2100 speed_index = map_size - 1;
2101 match = false;
2102 } else if (i == map_size)
2103 match = false;
2104
2105 if (!match && query) {
2106 LOG_INFO("Unable to match requested speed %d kHz, using %d kHz", \
2107 khz, map[speed_index].speed);
2108 }
2109
2110 return speed_index;
2111 }
2112
2113 static int stlink_speed_swd(void *handle, int khz, bool query)
2114 {
2115 int speed_index;
2116 struct stlink_usb_handle_s *h = handle;
2117
2118 /* only supported by stlink/v2 and for firmware >= 22 */
2119 if (h->version.stlink == 1 || h->version.jtag < 22)
2120 return khz;
2121
2122 speed_index = stlink_match_speed_map(stlink_khz_to_speed_map_swd,
2123 ARRAY_SIZE(stlink_khz_to_speed_map_swd), khz, query);
2124
2125 if (!query) {
2126 int result = stlink_usb_set_swdclk(h, stlink_khz_to_speed_map_swd[speed_index].speed_divisor);
2127 if (result != ERROR_OK) {
2128 LOG_ERROR("Unable to set adapter speed");
2129 return khz;
2130 }
2131 }
2132
2133 return stlink_khz_to_speed_map_swd[speed_index].speed;
2134 }
2135
2136 static int stlink_speed_jtag(void *handle, int khz, bool query)
2137 {
2138 int speed_index;
2139 struct stlink_usb_handle_s *h = handle;
2140
2141 /* only supported by stlink/v2 and for firmware >= 24 */
2142 if (h->version.stlink == 1 || h->version.jtag < 24)
2143 return khz;
2144
2145 speed_index = stlink_match_speed_map(stlink_khz_to_speed_map_jtag,
2146 ARRAY_SIZE(stlink_khz_to_speed_map_jtag), khz, query);
2147
2148 if (!query) {
2149 int result = stlink_usb_set_jtagclk(h, stlink_khz_to_speed_map_jtag[speed_index].speed_divisor);
2150 if (result != ERROR_OK) {
2151 LOG_ERROR("Unable to set adapter speed");
2152 return khz;
2153 }
2154 }
2155
2156 return stlink_khz_to_speed_map_jtag[speed_index].speed;
2157 }
2158
2159 void stlink_dump_speed_map(const struct speed_map *map, unsigned int map_size)
2160 {
2161 unsigned int i;
2162
2163 LOG_DEBUG("Supported clock speeds are:");
2164 for (i = 0; i < map_size; i++)
2165 LOG_DEBUG("%d kHz", map[i].speed);
2166 }
2167
2168 static int stlink_speed(void *handle, int khz, bool query)
2169 {
2170 struct stlink_usb_handle_s *h = handle;
2171
2172 if (!handle)
2173 return khz;
2174
2175 if (h->transport == HL_TRANSPORT_SWIM)
2176 return stlink_speed_swim(handle, khz, query);
2177 else if (h->transport == HL_TRANSPORT_SWD)
2178 return stlink_speed_swd(handle, khz, query);
2179 else if (h->transport == HL_TRANSPORT_JTAG)
2180 return stlink_speed_jtag(handle, khz, query);
2181
2182 return khz;
2183 }
2184
2185 /** */
2186 static int stlink_usb_close(void *handle)
2187 {
2188 int res;
2189 uint8_t mode;
2190 enum stlink_mode emode;
2191 struct stlink_usb_handle_s *h = handle;
2192
2193 if (h && h->fd)
2194 res = stlink_usb_current_mode(handle, &mode);
2195 else
2196 res = ERROR_FAIL;
2197 /* do not exit if return code != ERROR_OK,
2198 it prevents us from closing jtag_libusb */
2199
2200 if (res == ERROR_OK) {
2201 /* try to exit current mode */
2202 switch (mode) {
2203 case STLINK_DEV_DFU_MODE:
2204 emode = STLINK_MODE_DFU;
2205 break;
2206 case STLINK_DEV_DEBUG_MODE:
2207 emode = STLINK_MODE_DEBUG_SWD;
2208 break;
2209 case STLINK_DEV_SWIM_MODE:
2210 emode = STLINK_MODE_DEBUG_SWIM;
2211 break;
2212 case STLINK_DEV_BOOTLOADER_MODE:
2213 case STLINK_DEV_MASS_MODE:
2214 default:
2215 emode = STLINK_MODE_UNKNOWN;
2216 break;
2217 }
2218
2219 if (emode != STLINK_MODE_UNKNOWN)
2220 stlink_usb_mode_leave(handle, emode);
2221 /* do not check return code, it prevent
2222 us from closing jtag_libusb */
2223 }
2224
2225 if (h && h->fd)
2226 jtag_libusb_close(h->fd);
2227
2228 free(h);
2229
2230 return ERROR_OK;
2231 }
2232
2233 /** */
2234 static int stlink_usb_open(struct hl_interface_param_s *param, void **fd)
2235 {
2236 int err, retry_count = 1;
2237 struct stlink_usb_handle_s *h;
2238 enum stlink_jtag_api_version api;
2239
2240 LOG_DEBUG("stlink_usb_open");
2241
2242 h = calloc(1, sizeof(struct stlink_usb_handle_s));
2243
2244 if (h == 0) {
2245 LOG_DEBUG("malloc failed");
2246 return ERROR_FAIL;
2247 }
2248
2249 h->transport = param->transport;
2250
2251 for (unsigned i = 0; param->vid[i]; i++) {
2252 LOG_DEBUG("transport: %d vid: 0x%04x pid: 0x%04x serial: %s",
2253 param->transport, param->vid[i], param->pid[i],
2254 param->serial ? param->serial : "");
2255 }
2256
2257 /*
2258 On certain host USB configurations(e.g. MacBook Air)
2259 STLINKv2 dongle seems to have its FW in a funky state if,
2260 after plugging it in, you try to use openocd with it more
2261 then once (by launching and closing openocd). In cases like
2262 that initial attempt to read the FW info via
2263 stlink_usb_version will fail and the device has to be reset
2264 in order to become operational.
2265 */
2266 do {
2267 if (jtag_libusb_open(param->vid, param->pid, param->serial, &h->fd) != ERROR_OK) {
2268 LOG_ERROR("open failed");
2269 goto error_open;
2270 }
2271
2272 jtag_libusb_set_configuration(h->fd, 0);
2273
2274 if (jtag_libusb_claim_interface(h->fd, 0) != ERROR_OK) {
2275 LOG_DEBUG("claim interface failed");
2276 goto error_open;
2277 }
2278
2279 /* RX EP is common for all versions */
2280 h->rx_ep = STLINK_RX_EP;
2281
2282 uint16_t pid;
2283 if (jtag_libusb_get_pid(jtag_libusb_get_device(h->fd), &pid) != ERROR_OK) {
2284 LOG_DEBUG("libusb_get_pid failed");
2285 goto error_open;
2286 }
2287
2288 /* wrap version for first read */
2289 switch (pid) {
2290 case STLINK_V1_PID:
2291 h->version.stlink = 1;
2292 h->tx_ep = STLINK_TX_EP;
2293 break;
2294 case STLINK_V2_1_PID:
2295 case STLINK_V2_1_NO_MSD_PID:
2296 h->version.stlink = 2;
2297 h->tx_ep = STLINK_V2_1_TX_EP;
2298 h->trace_ep = STLINK_V2_1_TRACE_EP;
2299 break;
2300 default:
2301 /* fall through - we assume V2 to be the default version*/
2302 case STLINK_V2_PID:
2303 h->version.stlink = 2;
2304 h->tx_ep = STLINK_TX_EP;
2305 h->trace_ep = STLINK_TRACE_EP;
2306 break;
2307 }
2308
2309 /* get the device version */
2310 err = stlink_usb_version(h);
2311
2312 if (err == ERROR_OK) {
2313 break;
2314 } else if (h->version.stlink == 1 ||
2315 retry_count == 0) {
2316 LOG_ERROR("read version failed");
2317 goto error_open;
2318 } else {
2319 err = jtag_libusb_release_interface(h->fd, 0);
2320 if (err != ERROR_OK) {
2321 LOG_ERROR("release interface failed");
2322 goto error_open;
2323 }
2324
2325 err = jtag_libusb_reset_device(h->fd);
2326 if (err != ERROR_OK) {
2327 LOG_ERROR("reset device failed");
2328 goto error_open;
2329 }
2330
2331 jtag_libusb_close(h->fd);
2332 /*
2333 Give the device one second to settle down and
2334 reenumerate.
2335 */
2336 usleep(1 * 1000 * 1000);
2337 retry_count--;
2338 }
2339 } while (1);
2340
2341 /* check if mode is supported */
2342 err = ERROR_OK;
2343
2344 switch (h->transport) {
2345 case HL_TRANSPORT_SWD:
2346 if (h->version.jtag_api_max == STLINK_JTAG_API_V1)
2347 err = ERROR_FAIL;
2348 /* fall-through */
2349 case HL_TRANSPORT_JTAG:
2350 if (h->version.jtag == 0)
2351 err = ERROR_FAIL;
2352 break;
2353 case HL_TRANSPORT_SWIM:
2354 if (h->version.swim == 0)
2355 err = ERROR_FAIL;
2356 break;
2357 default:
2358 err = ERROR_FAIL;
2359 break;
2360 }
2361
2362 if (err != ERROR_OK) {
2363 LOG_ERROR("mode (transport) not supported by device");
2364 goto error_open;
2365 }
2366
2367 api = h->version.jtag_api_max;
2368
2369 LOG_INFO("using stlink api v%d", api);
2370
2371 /* set the used jtag api, this will default to the newest supported version */
2372 h->jtag_api = api;
2373
2374 /* initialize the debug hardware */
2375 err = stlink_usb_init_mode(h, param->connect_under_reset);
2376
2377 if (err != ERROR_OK) {
2378 LOG_ERROR("init mode failed (unable to connect to the target)");
2379 goto error_open;
2380 }
2381
2382 if (h->transport == HL_TRANSPORT_SWIM) {
2383 err = stlink_swim_enter(h);
2384 if (err != ERROR_OK) {
2385 LOG_ERROR("stlink_swim_enter_failed (unable to connect to the target)");
2386 goto error_open;
2387 }
2388 *fd = h;
2389 h->max_mem_packet = STLINK_DATA_SIZE;
2390 return ERROR_OK;
2391 }
2392
2393 if (h->transport == HL_TRANSPORT_JTAG) {
2394 /* jtag clock speed only supported by stlink/v2 and for firmware >= 24 */
2395 if (h->version.stlink >= 2 && h->version.jtag >= 24) {
2396 stlink_dump_speed_map(stlink_khz_to_speed_map_jtag, ARRAY_SIZE(stlink_khz_to_speed_map_jtag));
2397 stlink_speed(h, param->initial_interface_speed, false);
2398 }
2399 } else if (h->transport == HL_TRANSPORT_SWD) {
2400 /* clock speed only supported by stlink/v2 and for firmware >= 22 */
2401 if (h->version.stlink >= 2 && h->version.jtag >= 22) {
2402 stlink_dump_speed_map(stlink_khz_to_speed_map_swd, ARRAY_SIZE(stlink_khz_to_speed_map_swd));
2403 stlink_speed(h, param->initial_interface_speed, false);
2404 }
2405 }
2406
2407 /* get cpuid, so we can determine the max page size
2408 * start with a safe default */
2409 h->max_mem_packet = (1 << 10);
2410
2411 uint8_t buffer[4];
2412 err = stlink_usb_read_mem32(h, CPUID, 4, buffer);
2413 if (err == ERROR_OK) {
2414 uint32_t cpuid = le_to_h_u32(buffer);
2415 int i = (cpuid >> 4) & 0xf;
2416 if (i == 4 || i == 3) {
2417 /* Cortex-M3/M4 has 4096 bytes autoincrement range */
2418 h->max_mem_packet = (1 << 12);
2419 }
2420 }
2421
2422 LOG_DEBUG("Using TAR autoincrement: %" PRIu32, h->max_mem_packet);
2423
2424 *fd = h;
2425
2426 return ERROR_OK;
2427
2428 error_open:
2429 stlink_usb_close(h);
2430
2431 return ERROR_FAIL;
2432 }
2433
2434 int stlink_config_trace(void *handle, bool enabled, enum tpiu_pin_protocol pin_protocol,
2435 uint32_t port_size, unsigned int *trace_freq)
2436 {
2437 struct stlink_usb_handle_s *h = handle;
2438
2439 if (enabled && (!(h->version.flags & STLINK_F_HAS_TRACE) ||
2440 pin_protocol != TPIU_PIN_PROTOCOL_ASYNC_UART)) {
2441 LOG_ERROR("The attached ST-LINK version doesn't support this trace mode");
2442 return ERROR_FAIL;
2443 }
2444
2445 if (!enabled) {
2446 stlink_usb_trace_disable(h);
2447 return ERROR_OK;
2448 }
2449
2450 if (*trace_freq > STLINK_TRACE_MAX_HZ) {
2451 LOG_ERROR("ST-LINK doesn't support SWO frequency higher than %u",
2452 STLINK_TRACE_MAX_HZ);
2453 return ERROR_FAIL;
2454 }
2455
2456 stlink_usb_trace_disable(h);
2457
2458 if (!*trace_freq)
2459 *trace_freq = STLINK_TRACE_MAX_HZ;
2460 h->trace.source_hz = *trace_freq;
2461
2462 return stlink_usb_trace_enable(h);
2463 }
2464
2465 /** */
2466 struct hl_layout_api_s stlink_usb_layout_api = {
2467 /** */
2468 .open = stlink_usb_open,
2469 /** */
2470 .close = stlink_usb_close,
2471 /** */
2472 .idcode = stlink_usb_idcode,
2473 /** */
2474 .state = stlink_usb_state,
2475 /** */
2476 .reset = stlink_usb_reset,
2477 /** */
2478 .assert_srst = stlink_usb_assert_srst,
2479 /** */
2480 .run = stlink_usb_run,
2481 /** */
2482 .halt = stlink_usb_halt,
2483 /** */
2484 .step = stlink_usb_step,
2485 /** */
2486 .read_regs = stlink_usb_read_regs,
2487 /** */
2488 .read_reg = stlink_usb_read_reg,
2489 /** */
2490 .write_reg = stlink_usb_write_reg,
2491 /** */
2492 .read_mem = stlink_usb_read_mem,
2493 /** */
2494 .write_mem = stlink_usb_write_mem,
2495 /** */
2496 .write_debug_reg = stlink_usb_write_debug_reg,
2497 /** */
2498 .override_target = stlink_usb_override_target,
2499 /** */
2500 .speed = stlink_speed,
2501 /** */
2502 .config_trace = stlink_config_trace,
2503 /** */
2504 .poll_trace = stlink_usb_trace_read,
2505 };