9 #include "stlink-common.h"
10 #include "stlink-usb.h"
11 #include "uglylogging.h"
13 /* code from bsd timersub.h
14 http://www.gnu-darwin.org/www001/src/ports/net/libevnet/work/libevnet-0.3.8/libnostd/bsd/sys/time/timersub.h.html
17 #define timersub(a, b, r) do { \
18 (r)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
19 (r)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
20 if ((r)->tv_usec < 0) { \
22 (r)->tv_usec += 1000000; \
27 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
29 void _stlink_usb_close(stlink_t* sl) {
30 struct stlink_libusb * const handle = sl->backend_data;
31 // maybe we couldn't even get the usb device?
33 if (handle->req_trans != NULL)
34 libusb_free_transfer(handle->req_trans);
36 if (handle->rep_trans != NULL)
37 libusb_free_transfer(handle->rep_trans);
39 if (handle->usb_handle != NULL) {
40 libusb_close(handle->usb_handle);
43 libusb_exit(handle->libusb_ctx);
50 #define TRANS_FLAGS_IS_DONE (1 << 0)
51 #define TRANS_FLAGS_HAS_ERROR (1 << 1)
52 volatile unsigned long flags;
59 static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
60 struct trans_ctx * const ctx = trans->user_data;
62 if (trans->status != LIBUSB_TRANSFER_COMPLETED)
63 ctx->flags |= TRANS_FLAGS_HAS_ERROR;
65 ctx->flags |= TRANS_FLAGS_IS_DONE;
68 int submit_wait(struct stlink_libusb *slu, struct libusb_transfer * trans) {
72 struct trans_ctx trans_ctx;
73 enum libusb_error error;
77 /* brief intrusion inside the libusb interface */
78 trans->callback = on_trans_done;
79 trans->user_data = &trans_ctx;
81 if ((error = libusb_submit_transfer(trans))) {
82 printf("libusb_submit_transfer(%d)\n", error);
86 gettimeofday(&start, NULL);
88 while (trans_ctx.flags == 0) {
89 struct timeval timeout;
92 if (libusb_handle_events_timeout(slu->libusb_ctx, &timeout)) {
93 printf("libusb_handle_events()\n");
97 gettimeofday(&now, NULL);
98 timersub(&now, &start, &diff);
99 if (diff.tv_sec >= 3) {
100 printf("libusb_handle_events() timeout\n");
105 if (trans_ctx.flags & TRANS_FLAGS_HAS_ERROR) {
106 printf("libusb_handle_events() | has_error\n");
113 ssize_t send_recv(struct stlink_libusb* handle, int terminate,
114 unsigned char* txbuf, size_t txsize,
115 unsigned char* rxbuf, size_t rxsize) {
116 /* note: txbuf and rxbuf can point to the same area */
119 libusb_fill_bulk_transfer(handle->req_trans, handle->usb_handle,
126 if (submit_wait(handle, handle->req_trans)) return -1;
131 /* read the response */
133 libusb_fill_bulk_transfer(handle->rep_trans, handle->usb_handle,
134 handle->ep_rep, rxbuf, rxsize, NULL, NULL, 0);
136 if (submit_wait(handle, handle->rep_trans)) return -1;
137 res = handle->rep_trans->actual_length;
140 if ((handle->protocoll == 1) && terminate) {
141 /* Read the SG reply */
142 unsigned char sg_buf[13];
143 libusb_fill_bulk_transfer
144 (handle->rep_trans, handle->usb_handle,
145 handle->ep_rep, sg_buf, 13, NULL, NULL, 0);
146 res = submit_wait(handle, handle->rep_trans);
147 /* The STLink doesn't seem to evaluate the sequence number */
148 handle->sg_transfer_idx++;
152 return handle->rep_trans->actual_length;
155 static inline int send_only
156 (struct stlink_libusb* handle, int terminate,
157 unsigned char* txbuf, size_t txsize) {
158 return send_recv(handle, terminate, txbuf, txsize, NULL, 0);
162 static int fill_command
163 (stlink_t * sl, enum SCSI_Generic_Direction dir, uint32_t len) {
164 struct stlink_libusb * const slu = sl->backend_data;
165 unsigned char* const cmd = sl->c_buf;
167 memset(cmd, 0, sizeof (sl->c_buf));
168 if(slu->protocoll == 1) {
173 write_uint32(&cmd[i], slu->sg_transfer_idx);
174 write_uint32(&cmd[i + 4], len);
176 cmd[i++] = (dir == SG_DXFER_FROM_DEV)?0x80:0;
177 cmd[i++] = 0; /* Logical unit */
178 cmd[i++] = 0xa; /* Command length */
183 void _stlink_usb_version(stlink_t *sl) {
184 struct stlink_libusb * const slu = sl->backend_data;
185 unsigned char* const data = sl->q_buf;
186 unsigned char* const cmd = sl->c_buf;
188 uint32_t rep_len = 6;
189 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
191 cmd[i++] = STLINK_GET_VERSION;
193 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
195 printf("[!] send_recv\n");
200 int32_t _stlink_usb_target_voltage(stlink_t *sl) {
201 struct stlink_libusb * const slu = sl->backend_data;
202 unsigned char* const rdata = sl->q_buf;
203 unsigned char* const cmd = sl->c_buf;
205 uint32_t rep_len = 8;
206 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
207 uint32_t factor, reading;
210 cmd[i++] = STLINK_GET_TARGET_VOLTAGE;
212 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
214 printf("[!] send_recv\n");
216 } else if (size != 8) {
217 printf("[!] wrong length\n");
221 factor = (rdata[3] << 24) | (rdata[2] << 16) | (rdata[1] << 8) | (rdata[0] << 0);
222 reading = (rdata[7] << 24) | (rdata[6] << 16) | (rdata[5] << 8) | (rdata[4] << 0);
223 voltage = 2400 * reading / factor;
228 uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
229 struct stlink_libusb * const slu = sl->backend_data;
230 unsigned char* const rdata = sl->q_buf;
231 unsigned char* const cmd = sl->c_buf;
233 const int rep_len = 8;
235 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
236 cmd[i++] = STLINK_DEBUG_COMMAND;
237 cmd[i++] = STLINK_JTAG_READDEBUG_32BIT;
238 write_uint32(&cmd[i], addr);
239 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
241 printf("[!] send_recv\n");
244 return read_uint32(rdata, 4);
247 void _stlink_usb_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data) {
248 struct stlink_libusb * const slu = sl->backend_data;
249 unsigned char* const rdata = sl->q_buf;
250 unsigned char* const cmd = sl->c_buf;
252 const int rep_len = 2;
254 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
255 cmd[i++] = STLINK_DEBUG_COMMAND;
256 cmd[i++] = STLINK_JTAG_WRITEDEBUG_32BIT;
257 write_uint32(&cmd[i], addr);
258 write_uint32(&cmd[i + 4], data);
259 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
261 printf("[!] send_recv\n");
266 void _stlink_usb_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
267 struct stlink_libusb * const slu = sl->backend_data;
268 unsigned char* const data = sl->q_buf;
269 unsigned char* const cmd = sl->c_buf;
271 int i = fill_command(sl, SG_DXFER_TO_DEV, len);
272 cmd[i++] = STLINK_DEBUG_COMMAND;
273 cmd[i++] = STLINK_DEBUG_WRITEMEM_32BIT;
274 write_uint32(&cmd[i], addr);
275 write_uint16(&cmd[i + 4], len);
276 send_only(slu, 0, cmd, slu->cmd_len);
278 send_only(slu, 1, data, len);
281 void _stlink_usb_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len) {
282 struct stlink_libusb * const slu = sl->backend_data;
283 unsigned char* const data = sl->q_buf;
284 unsigned char* const cmd = sl->c_buf;
286 int i = fill_command(sl, SG_DXFER_TO_DEV, 0);
287 cmd[i++] = STLINK_DEBUG_COMMAND;
288 cmd[i++] = STLINK_DEBUG_WRITEMEM_8BIT;
289 write_uint32(&cmd[i], addr);
290 write_uint16(&cmd[i + 4], len);
291 send_only(slu, 0, cmd, slu->cmd_len);
292 send_only(slu, 1, data, len);
296 int _stlink_usb_current_mode(stlink_t * sl) {
297 struct stlink_libusb * const slu = sl->backend_data;
298 unsigned char* const cmd = sl->c_buf;
299 unsigned char* const data = sl->q_buf;
302 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
304 cmd[i++] = STLINK_GET_CURRENT_MODE;
305 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
307 printf("[!] send_recv\n");
313 void _stlink_usb_core_id(stlink_t * sl) {
314 struct stlink_libusb * const slu = sl->backend_data;
315 unsigned char* const cmd = sl->c_buf;
316 unsigned char* const data = sl->q_buf;
319 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
321 cmd[i++] = STLINK_DEBUG_COMMAND;
322 cmd[i++] = STLINK_DEBUG_READCOREID;
324 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
326 printf("[!] send_recv\n");
330 sl->core_id = read_uint32(data, 0);
333 void _stlink_usb_status(stlink_t * sl) {
334 struct stlink_libusb * const slu = sl->backend_data;
335 unsigned char* const data = sl->q_buf;
336 unsigned char* const cmd = sl->c_buf;
339 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
341 cmd[i++] = STLINK_DEBUG_COMMAND;
342 cmd[i++] = STLINK_DEBUG_GETSTATUS;
344 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
346 printf("[!] send_recv\n");
351 void _stlink_usb_force_debug(stlink_t *sl) {
352 struct stlink_libusb *slu = sl->backend_data;
353 unsigned char* const data = sl->q_buf;
354 unsigned char* const cmd = sl->c_buf;
357 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
359 cmd[i++] = STLINK_DEBUG_COMMAND;
360 cmd[i++] = STLINK_DEBUG_FORCEDEBUG;
361 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
363 printf("[!] send_recv\n");
368 void _stlink_usb_enter_swd_mode(stlink_t * sl) {
369 struct stlink_libusb * const slu = sl->backend_data;
370 unsigned char* const cmd = sl->c_buf;
372 const int rep_len = 0;
373 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
375 cmd[i++] = STLINK_DEBUG_COMMAND;
376 cmd[i++] = STLINK_DEBUG_ENTER;
377 cmd[i++] = STLINK_DEBUG_ENTER_SWD;
379 size = send_only(slu, 1, cmd, slu->cmd_len);
381 printf("[!] send_recv\n");
386 void _stlink_usb_exit_dfu_mode(stlink_t* sl) {
387 struct stlink_libusb * const slu = sl->backend_data;
388 unsigned char* const cmd = sl->c_buf;
390 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
392 cmd[i++] = STLINK_DFU_COMMAND;
393 cmd[i++] = STLINK_DFU_EXIT;
395 size = send_only(slu, 1, cmd, slu->cmd_len);
397 printf("[!] send_recv\n");
403 * TODO - not convinced this does anything...
406 void _stlink_usb_reset(stlink_t * sl) {
407 struct stlink_libusb * const slu = sl->backend_data;
408 unsigned char* const data = sl->q_buf;
409 unsigned char* const cmd = sl->c_buf;
412 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
414 cmd[i++] = STLINK_DEBUG_COMMAND;
415 cmd[i++] = STLINK_DEBUG_RESETSYS;
417 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
419 printf("[!] send_recv\n");
425 void _stlink_usb_jtag_reset(stlink_t * sl, int value) {
426 struct stlink_libusb * const slu = sl->backend_data;
427 unsigned char* const data = sl->q_buf;
428 unsigned char* const cmd = sl->c_buf;
431 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
433 cmd[i++] = STLINK_DEBUG_COMMAND;
434 cmd[i++] = STLINK_JTAG_DRIVE_NRST;
437 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
439 printf("[!] send_recv\n");
445 void _stlink_usb_step(stlink_t* sl) {
446 struct stlink_libusb * const slu = sl->backend_data;
447 unsigned char* const data = sl->q_buf;
448 unsigned char* const cmd = sl->c_buf;
451 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
453 cmd[i++] = STLINK_DEBUG_COMMAND;
454 cmd[i++] = STLINK_DEBUG_STEPCORE;
456 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
458 printf("[!] send_recv\n");
464 * This seems to do a good job of restarting things from the beginning?
467 void _stlink_usb_run(stlink_t* sl) {
468 struct stlink_libusb * const slu = sl->backend_data;
469 unsigned char* const data = sl->q_buf;
470 unsigned char* const cmd = sl->c_buf;
473 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
475 cmd[i++] = STLINK_DEBUG_COMMAND;
476 cmd[i++] = STLINK_DEBUG_RUNCORE;
478 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
480 printf("[!] send_recv\n");
485 void _stlink_usb_exit_debug_mode(stlink_t *sl) {
486 struct stlink_libusb * const slu = sl->backend_data;
487 unsigned char* const cmd = sl->c_buf;
489 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
491 cmd[i++] = STLINK_DEBUG_COMMAND;
492 cmd[i++] = STLINK_DEBUG_EXIT;
494 size = send_only(slu, 1, cmd, slu->cmd_len);
496 printf("[!] send_only\n");
501 void _stlink_usb_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
502 struct stlink_libusb * const slu = sl->backend_data;
503 unsigned char* const data = sl->q_buf;
504 unsigned char* const cmd = sl->c_buf;
506 int i = fill_command(sl, SG_DXFER_FROM_DEV, len);
508 cmd[i++] = STLINK_DEBUG_COMMAND;
509 cmd[i++] = STLINK_DEBUG_READMEM_32BIT;
510 write_uint32(&cmd[i], addr);
511 write_uint16(&cmd[i + 4], len);
513 size = send_recv(slu, 1, cmd, slu->cmd_len, data, len);
515 printf("[!] send_recv\n");
519 sl->q_len = (size_t) size;
521 stlink_print_data(sl);
524 void _stlink_usb_read_all_regs(stlink_t *sl, reg *regp) {
525 struct stlink_libusb * const slu = sl->backend_data;
526 unsigned char* const cmd = sl->c_buf;
527 unsigned char* const data = sl->q_buf;
529 uint32_t rep_len = 84;
530 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
532 cmd[i++] = STLINK_DEBUG_COMMAND;
533 cmd[i++] = STLINK_DEBUG_READALLREGS;
534 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
536 printf("[!] send_recv\n");
539 sl->q_len = (size_t) size;
540 stlink_print_data(sl);
542 regp->r[i]= read_uint32(sl->q_buf, i*4);
543 regp->xpsr = read_uint32(sl->q_buf, 64);
544 regp->main_sp = read_uint32(sl->q_buf, 68);
545 regp->process_sp = read_uint32(sl->q_buf, 72);
546 regp->rw = read_uint32(sl->q_buf, 76);
547 regp->rw2 = read_uint32(sl->q_buf, 80);
551 DLOG("xpsr = 0x%08x\n", read_uint32(sl->q_buf, 64));
552 DLOG("main_sp = 0x%08x\n", read_uint32(sl->q_buf, 68));
553 DLOG("process_sp = 0x%08x\n", read_uint32(sl->q_buf, 72));
554 DLOG("rw = 0x%08x\n", read_uint32(sl->q_buf, 76));
555 DLOG("rw2 = 0x%08x\n", read_uint32(sl->q_buf, 80));
558 void _stlink_usb_read_reg(stlink_t *sl, int r_idx, reg *regp) {
559 struct stlink_libusb * const slu = sl->backend_data;
560 unsigned char* const data = sl->q_buf;
561 unsigned char* const cmd = sl->c_buf;
564 uint32_t rep_len = 4;
565 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
567 cmd[i++] = STLINK_DEBUG_COMMAND;
568 cmd[i++] = STLINK_DEBUG_READREG;
569 cmd[i++] = (uint8_t) r_idx;
570 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
572 printf("[!] send_recv\n");
575 sl->q_len = (size_t) size;
576 stlink_print_data(sl);
577 r = read_uint32(sl->q_buf, 0);
578 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
588 regp->process_sp = r;
591 regp->rw = r; /* XXX ?(primask, basemask etc.) */
594 regp->rw2 = r; /* XXX ?(primask, basemask etc.) */
601 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
602 void _stlink_usb_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
605 sl->q_buf[0] = (unsigned char) r_idx;
606 for (int i = 1; i < 4; i++) {
610 _stlink_usb_write_mem32(sl, DCRSR, 4);
611 _stlink_usb_read_mem32(sl, DCRDR, 4);
613 r = read_uint32(sl->q_buf, 0);
614 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
618 regp->primask = (uint8_t) (r & 0xFF);
619 regp->basepri = (uint8_t) ((r>>8) & 0xFF);
620 regp->faultmask = (uint8_t) ((r>>16) & 0xFF);
621 regp->control = (uint8_t) ((r>>24) & 0xFF);
627 regp->s[r_idx - 0x40] = r;
632 void _stlink_usb_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
633 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
634 _stlink_usb_read_unsupported_reg(sl, 0x21, regp);
636 for (int i = 0; i < 32; i++) {
637 _stlink_usb_read_unsupported_reg(sl, 0x40+i, regp);
641 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
642 void _stlink_usb_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
643 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
644 /* These are held in the same register */
645 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
647 val = (uint8_t) (val>>24);
650 case 0x1C: /* control */
651 val = (((uint32_t) val) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
653 case 0x1D: /* faultmask */
654 val = (((uint32_t) regp->control) << 24) | (((uint32_t) val) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
656 case 0x1E: /* basepri */
657 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) val) << 8) | ((uint32_t) regp->primask);
659 case 0x1F: /* primask */
660 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) val);
667 write_uint32(sl->q_buf, val);
669 _stlink_usb_write_mem32(sl, DCRDR, 4);
671 sl->q_buf[0] = (unsigned char) r_idx;
676 _stlink_usb_write_mem32(sl, DCRSR, 4);
679 void _stlink_usb_write_reg(stlink_t *sl, uint32_t reg, int idx) {
680 struct stlink_libusb * const slu = sl->backend_data;
681 unsigned char* const data = sl->q_buf;
682 unsigned char* const cmd = sl->c_buf;
684 uint32_t rep_len = 2;
685 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
687 cmd[i++] = STLINK_DEBUG_COMMAND;
688 cmd[i++] = STLINK_DEBUG_WRITEREG;
690 write_uint32(&cmd[i], reg);
691 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
693 printf("[!] send_recv\n");
696 sl->q_len = (size_t) size;
697 stlink_print_data(sl);
700 stlink_backend_t _stlink_usb_backend = {
702 _stlink_usb_exit_debug_mode,
703 _stlink_usb_enter_swd_mode,
704 NULL, // no enter_jtag_mode here...
705 _stlink_usb_exit_dfu_mode,
708 _stlink_usb_jtag_reset,
712 _stlink_usb_read_debug32,
713 _stlink_usb_read_mem32,
714 _stlink_usb_write_debug32,
715 _stlink_usb_write_mem32,
716 _stlink_usb_write_mem8,
717 _stlink_usb_read_all_regs,
718 _stlink_usb_read_reg,
719 _stlink_usb_read_all_unsupported_regs,
720 _stlink_usb_read_unsupported_reg,
721 _stlink_usb_write_unsupported_reg,
722 _stlink_usb_write_reg,
724 _stlink_usb_current_mode,
725 _stlink_usb_force_debug,
726 _stlink_usb_target_voltage
730 stlink_t* stlink_open_usb(const int verbose, int reset) {
732 struct stlink_libusb* slu = NULL;
734 libusb_device** devs = NULL;
737 sl = malloc(sizeof (stlink_t));
738 slu = malloc(sizeof (struct stlink_libusb));
739 if (sl == NULL) goto on_error;
740 if (slu == NULL) goto on_error;
741 memset(sl, 0, sizeof (stlink_t));
742 memset(slu, 0, sizeof (struct stlink_libusb));
745 sl->backend = &_stlink_usb_backend;
746 sl->backend_data = slu;
748 sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
750 if (libusb_init(&(slu->libusb_ctx))) {
751 WLOG("failed to init libusb context, wrong version of libraries?\n");
755 libusb_device **list;
756 int cnt = libusb_get_device_list(slu->libusb_ctx, &list);
757 struct libusb_device_descriptor desc;
761 char *device = getenv("STLINK_DEVICE");
763 char *c = strchr(device,':');
765 WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
771 ILOG("bus %03d dev %03d\n",devBus, devAddr);
774 libusb_get_device_descriptor( list[cnt], &desc );
775 if (desc.idVendor!=USB_ST_VID) continue;
776 if (devBus && devAddr)
777 if ((libusb_get_bus_number(list[cnt])!=devBus) || (libusb_get_device_address(list[cnt])!=devAddr)) continue;
778 if ( (desc.idProduct == USB_STLINK_32L_PID) || (desc.idProduct == USB_STLINK_NUCLEO_PID) ) break;
779 if (desc.idProduct == USB_STLINK_PID) {
786 WLOG ("Couldn't find %s ST-Link/V2 devices\n",(devBus && devAddr)?"matched":"any");
789 int error = libusb_open(list[cnt], &slu->usb_handle);
791 WLOG("Error %d opening ST-Link/V2 device %03d:%03d\n", error, libusb_get_bus_number(list[cnt]), libusb_get_device_address(list[cnt]));
796 libusb_free_device_list(list, 1);
799 if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
802 r = libusb_detach_kernel_driver(slu->usb_handle, 0);
804 WLOG("libusb_detach_kernel_driver(() error %s\n", strerror(-r));
805 goto on_libusb_error;
809 if (libusb_get_configuration(slu->usb_handle, &config)) {
810 /* this may fail for a previous configured device */
811 WLOG("libusb_get_configuration()\n");
812 goto on_libusb_error;
816 printf("setting new configuration (%d -> 1)\n", config);
817 if (libusb_set_configuration(slu->usb_handle, 1)) {
818 /* this may fail for a previous configured device */
819 WLOG("libusb_set_configuration() failed\n");
820 goto on_libusb_error;
824 if (libusb_claim_interface(slu->usb_handle, 0)) {
825 WLOG("libusb_claim_interface() failed\n");
826 goto on_libusb_error;
829 slu->req_trans = libusb_alloc_transfer(0);
830 if (slu->req_trans == NULL) {
831 WLOG("libusb_alloc_transfer failed\n");
832 goto on_libusb_error;
835 slu->rep_trans = libusb_alloc_transfer(0);
836 if (slu->rep_trans == NULL) {
837 WLOG("libusb_alloc_transfer failed\n");
838 goto on_libusb_error;
841 // TODO - could use the scanning techniq from stm8 code here...
842 slu->ep_rep = 1 /* ep rep */ | LIBUSB_ENDPOINT_IN;
843 if (desc.idProduct == USB_STLINK_NUCLEO_PID) {
844 slu->ep_req = 1 /* ep req */ | LIBUSB_ENDPOINT_OUT;
846 slu->ep_req = 2 /* ep req */ | LIBUSB_ENDPOINT_OUT;
849 slu->sg_transfer_idx = 0;
850 // TODO - never used at the moment, always CMD_SIZE
851 slu->cmd_len = (slu->protocoll == 1)? STLINK_SG_SIZE: STLINK_CMD_SIZE;
855 if (stlink_current_mode(sl) == STLINK_DEV_DFU_MODE) {
856 ILOG("-- exit_dfu_mode\n");
857 stlink_exit_dfu_mode(sl);
860 if (stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE) {
861 stlink_enter_swd_mode(sl);
868 error = stlink_load_device_params(sl);
872 libusb_free_device_list(devs, 1);
885 libusb_exit(slu->libusb_ctx);
886 if (sl != NULL) free(sl);
887 if (slu != NULL) free(slu);