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