10 #include "stlink-common.h"
11 #include "stlink-usb.h"
12 #include "uglylogging.h"
14 /* code from bsd timersub.h
15 http://www.gnu-darwin.org/www001/src/ports/net/libevnet/work/libevnet-0.3.8/libnostd/bsd/sys/time/timersub.h.html
18 #define timersub(a, b, r) do { \
19 (r)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
20 (r)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
21 if ((r)->tv_usec < 0) { \
23 (r)->tv_usec += 1000000; \
28 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
30 void _stlink_usb_close(stlink_t* sl) {
31 struct stlink_libusb * const handle = sl->backend_data;
32 // maybe we couldn't even get the usb device?
34 if (handle->req_trans != NULL)
35 libusb_free_transfer(handle->req_trans);
37 if (handle->rep_trans != NULL)
38 libusb_free_transfer(handle->rep_trans);
40 if (handle->usb_handle != NULL) {
41 libusb_close(handle->usb_handle);
44 libusb_exit(handle->libusb_ctx);
51 #define TRANS_FLAGS_IS_DONE (1 << 0)
52 #define TRANS_FLAGS_HAS_ERROR (1 << 1)
53 volatile unsigned long flags;
60 static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
61 struct trans_ctx * const ctx = trans->user_data;
63 if (trans->status != LIBUSB_TRANSFER_COMPLETED)
64 ctx->flags |= TRANS_FLAGS_HAS_ERROR;
66 ctx->flags |= TRANS_FLAGS_IS_DONE;
69 int submit_wait(struct stlink_libusb *slu, struct libusb_transfer * trans) {
73 struct trans_ctx trans_ctx;
74 enum libusb_error error;
78 /* brief intrusion inside the libusb interface */
79 trans->callback = on_trans_done;
80 trans->user_data = &trans_ctx;
82 if ((error = libusb_submit_transfer(trans))) {
83 printf("libusb_submit_transfer(%d)\n", error);
87 gettimeofday(&start, NULL);
89 while (trans_ctx.flags == 0) {
90 struct timeval timeout;
93 if (libusb_handle_events_timeout(slu->libusb_ctx, &timeout)) {
94 printf("libusb_handle_events()\n");
98 gettimeofday(&now, NULL);
99 timersub(&now, &start, &diff);
100 if (diff.tv_sec >= 3) {
101 printf("libusb_handle_events() timeout\n");
106 if (trans_ctx.flags & TRANS_FLAGS_HAS_ERROR) {
107 printf("libusb_handle_events() | has_error\n");
114 ssize_t send_recv(struct stlink_libusb* handle, int terminate,
115 unsigned char* txbuf, size_t txsize,
116 unsigned char* rxbuf, size_t rxsize) {
117 /* note: txbuf and rxbuf can point to the same area */
120 libusb_fill_bulk_transfer(handle->req_trans, handle->usb_handle,
127 if (submit_wait(handle, handle->req_trans)) return -1;
132 /* read the response */
134 libusb_fill_bulk_transfer(handle->rep_trans, handle->usb_handle,
135 handle->ep_rep, rxbuf, rxsize, NULL, NULL, 0);
137 if (submit_wait(handle, handle->rep_trans)) return -1;
138 res = handle->rep_trans->actual_length;
141 if ((handle->protocoll == 1) && terminate) {
142 /* Read the SG reply */
143 unsigned char sg_buf[13];
144 libusb_fill_bulk_transfer
145 (handle->rep_trans, handle->usb_handle,
146 handle->ep_rep, sg_buf, 13, NULL, NULL, 0);
147 res = submit_wait(handle, handle->rep_trans);
148 /* The STLink doesn't seem to evaluate the sequence number */
149 handle->sg_transfer_idx++;
153 return handle->rep_trans->actual_length;
156 static inline int send_only
157 (struct stlink_libusb* handle, int terminate,
158 unsigned char* txbuf, size_t txsize) {
159 return send_recv(handle, terminate, txbuf, txsize, NULL, 0);
163 static int fill_command
164 (stlink_t * sl, enum SCSI_Generic_Direction dir, uint32_t len) {
165 struct stlink_libusb * const slu = sl->backend_data;
166 unsigned char* const cmd = sl->c_buf;
168 memset(cmd, 0, sizeof (sl->c_buf));
169 if(slu->protocoll == 1) {
174 write_uint32(&cmd[i], slu->sg_transfer_idx);
175 write_uint32(&cmd[i + 4], len);
177 cmd[i++] = (dir == SG_DXFER_FROM_DEV)?0x80:0;
178 cmd[i++] = 0; /* Logical unit */
179 cmd[i++] = 0xa; /* Command length */
184 void _stlink_usb_version(stlink_t *sl) {
185 struct stlink_libusb * const slu = sl->backend_data;
186 unsigned char* const data = sl->q_buf;
187 unsigned char* const cmd = sl->c_buf;
189 uint32_t rep_len = 6;
190 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
192 cmd[i++] = STLINK_GET_VERSION;
194 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
196 printf("[!] send_recv\n");
201 int32_t _stlink_usb_target_voltage(stlink_t *sl) {
202 struct stlink_libusb * const slu = sl->backend_data;
203 unsigned char* const rdata = sl->q_buf;
204 unsigned char* const cmd = sl->c_buf;
206 uint32_t rep_len = 8;
207 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
208 uint32_t factor, reading;
211 cmd[i++] = STLINK_GET_TARGET_VOLTAGE;
213 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
215 printf("[!] send_recv\n");
217 } else if (size != 8) {
218 printf("[!] wrong length\n");
222 factor = (rdata[3] << 24) | (rdata[2] << 16) | (rdata[1] << 8) | (rdata[0] << 0);
223 reading = (rdata[7] << 24) | (rdata[6] << 16) | (rdata[5] << 8) | (rdata[4] << 0);
224 voltage = 2400 * reading / factor;
229 uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
230 struct stlink_libusb * const slu = sl->backend_data;
231 unsigned char* const rdata = sl->q_buf;
232 unsigned char* const cmd = sl->c_buf;
234 const int rep_len = 8;
236 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
237 cmd[i++] = STLINK_DEBUG_COMMAND;
238 cmd[i++] = STLINK_JTAG_READDEBUG_32BIT;
239 write_uint32(&cmd[i], addr);
240 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
242 printf("[!] send_recv\n");
245 return read_uint32(rdata, 4);
248 void _stlink_usb_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data) {
249 struct stlink_libusb * const slu = sl->backend_data;
250 unsigned char* const rdata = sl->q_buf;
251 unsigned char* const cmd = sl->c_buf;
253 const int rep_len = 2;
255 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
256 cmd[i++] = STLINK_DEBUG_COMMAND;
257 cmd[i++] = STLINK_JTAG_WRITEDEBUG_32BIT;
258 write_uint32(&cmd[i], addr);
259 write_uint32(&cmd[i + 4], data);
260 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
262 printf("[!] send_recv\n");
267 void _stlink_usb_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
268 struct stlink_libusb * const slu = sl->backend_data;
269 unsigned char* const data = sl->q_buf;
270 unsigned char* const cmd = sl->c_buf;
272 int i = fill_command(sl, SG_DXFER_TO_DEV, len);
273 cmd[i++] = STLINK_DEBUG_COMMAND;
274 cmd[i++] = STLINK_DEBUG_WRITEMEM_32BIT;
275 write_uint32(&cmd[i], addr);
276 write_uint16(&cmd[i + 4], len);
277 send_only(slu, 0, cmd, slu->cmd_len);
279 send_only(slu, 1, data, len);
282 void _stlink_usb_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len) {
283 struct stlink_libusb * const slu = sl->backend_data;
284 unsigned char* const data = sl->q_buf;
285 unsigned char* const cmd = sl->c_buf;
287 int i = fill_command(sl, SG_DXFER_TO_DEV, 0);
288 cmd[i++] = STLINK_DEBUG_COMMAND;
289 cmd[i++] = STLINK_DEBUG_WRITEMEM_8BIT;
290 write_uint32(&cmd[i], addr);
291 write_uint16(&cmd[i + 4], len);
292 send_only(slu, 0, cmd, slu->cmd_len);
293 send_only(slu, 1, data, len);
297 int _stlink_usb_current_mode(stlink_t * sl) {
298 struct stlink_libusb * const slu = sl->backend_data;
299 unsigned char* const cmd = sl->c_buf;
300 unsigned char* const data = sl->q_buf;
303 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
305 cmd[i++] = STLINK_GET_CURRENT_MODE;
306 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
308 printf("[!] send_recv\n");
314 void _stlink_usb_core_id(stlink_t * sl) {
315 struct stlink_libusb * const slu = sl->backend_data;
316 unsigned char* const cmd = sl->c_buf;
317 unsigned char* const data = sl->q_buf;
320 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
322 cmd[i++] = STLINK_DEBUG_COMMAND;
323 cmd[i++] = STLINK_DEBUG_READCOREID;
325 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
327 printf("[!] send_recv\n");
331 sl->core_id = read_uint32(data, 0);
334 void _stlink_usb_status(stlink_t * sl) {
335 struct stlink_libusb * const slu = sl->backend_data;
336 unsigned char* const data = sl->q_buf;
337 unsigned char* const cmd = sl->c_buf;
340 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
342 cmd[i++] = STLINK_DEBUG_COMMAND;
343 cmd[i++] = STLINK_DEBUG_GETSTATUS;
345 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
347 printf("[!] send_recv\n");
352 void _stlink_usb_force_debug(stlink_t *sl) {
353 struct stlink_libusb *slu = sl->backend_data;
354 unsigned char* const data = sl->q_buf;
355 unsigned char* const cmd = sl->c_buf;
358 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
360 cmd[i++] = STLINK_DEBUG_COMMAND;
361 cmd[i++] = STLINK_DEBUG_FORCEDEBUG;
362 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
364 printf("[!] send_recv\n");
369 void _stlink_usb_enter_swd_mode(stlink_t * sl) {
370 struct stlink_libusb * const slu = sl->backend_data;
371 unsigned char* const cmd = sl->c_buf;
373 const int rep_len = 0;
374 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
376 cmd[i++] = STLINK_DEBUG_COMMAND;
377 cmd[i++] = STLINK_DEBUG_ENTER;
378 cmd[i++] = STLINK_DEBUG_ENTER_SWD;
380 size = send_only(slu, 1, cmd, slu->cmd_len);
382 printf("[!] send_recv\n");
387 void _stlink_usb_exit_dfu_mode(stlink_t* sl) {
388 struct stlink_libusb * const slu = sl->backend_data;
389 unsigned char* const cmd = sl->c_buf;
391 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
393 cmd[i++] = STLINK_DFU_COMMAND;
394 cmd[i++] = STLINK_DFU_EXIT;
396 size = send_only(slu, 1, cmd, slu->cmd_len);
398 printf("[!] send_recv\n");
404 * TODO - not convinced this does anything...
407 void _stlink_usb_reset(stlink_t * sl) {
408 struct stlink_libusb * const slu = sl->backend_data;
409 unsigned char* const data = sl->q_buf;
410 unsigned char* const cmd = sl->c_buf;
413 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
415 cmd[i++] = STLINK_DEBUG_COMMAND;
416 cmd[i++] = STLINK_DEBUG_RESETSYS;
418 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
420 printf("[!] send_recv\n");
426 void _stlink_usb_jtag_reset(stlink_t * sl, int value) {
427 struct stlink_libusb * const slu = sl->backend_data;
428 unsigned char* const data = sl->q_buf;
429 unsigned char* const cmd = sl->c_buf;
432 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
434 cmd[i++] = STLINK_DEBUG_COMMAND;
435 cmd[i++] = STLINK_JTAG_DRIVE_NRST;
438 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
440 printf("[!] send_recv\n");
446 void _stlink_usb_step(stlink_t* sl) {
447 struct stlink_libusb * const slu = sl->backend_data;
448 unsigned char* const data = sl->q_buf;
449 unsigned char* const cmd = sl->c_buf;
452 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
454 cmd[i++] = STLINK_DEBUG_COMMAND;
455 cmd[i++] = STLINK_DEBUG_STEPCORE;
457 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
459 printf("[!] send_recv\n");
465 * This seems to do a good job of restarting things from the beginning?
468 void _stlink_usb_run(stlink_t* sl) {
469 struct stlink_libusb * const slu = sl->backend_data;
470 unsigned char* const data = sl->q_buf;
471 unsigned char* const cmd = sl->c_buf;
474 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
476 cmd[i++] = STLINK_DEBUG_COMMAND;
477 cmd[i++] = STLINK_DEBUG_RUNCORE;
479 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
481 printf("[!] send_recv\n");
486 void _stlink_usb_exit_debug_mode(stlink_t *sl) {
487 struct stlink_libusb * const slu = sl->backend_data;
488 unsigned char* const cmd = sl->c_buf;
490 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
492 cmd[i++] = STLINK_DEBUG_COMMAND;
493 cmd[i++] = STLINK_DEBUG_EXIT;
495 size = send_only(slu, 1, cmd, slu->cmd_len);
497 printf("[!] send_only\n");
502 void _stlink_usb_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
503 struct stlink_libusb * const slu = sl->backend_data;
504 unsigned char* const data = sl->q_buf;
505 unsigned char* const cmd = sl->c_buf;
507 int i = fill_command(sl, SG_DXFER_FROM_DEV, len);
509 cmd[i++] = STLINK_DEBUG_COMMAND;
510 cmd[i++] = STLINK_DEBUG_READMEM_32BIT;
511 write_uint32(&cmd[i], addr);
512 write_uint16(&cmd[i + 4], len);
514 size = send_recv(slu, 1, cmd, slu->cmd_len, data, len);
516 printf("[!] send_recv\n");
520 sl->q_len = (size_t) size;
522 stlink_print_data(sl);
525 void _stlink_usb_read_all_regs(stlink_t *sl, reg *regp) {
526 struct stlink_libusb * const slu = sl->backend_data;
527 unsigned char* const cmd = sl->c_buf;
528 unsigned char* const data = sl->q_buf;
530 uint32_t rep_len = 84;
531 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
533 cmd[i++] = STLINK_DEBUG_COMMAND;
534 cmd[i++] = STLINK_DEBUG_READALLREGS;
535 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
537 printf("[!] send_recv\n");
540 sl->q_len = (size_t) size;
541 stlink_print_data(sl);
543 regp->r[i]= read_uint32(sl->q_buf, i*4);
544 regp->xpsr = read_uint32(sl->q_buf, 64);
545 regp->main_sp = read_uint32(sl->q_buf, 68);
546 regp->process_sp = read_uint32(sl->q_buf, 72);
547 regp->rw = read_uint32(sl->q_buf, 76);
548 regp->rw2 = read_uint32(sl->q_buf, 80);
552 DLOG("xpsr = 0x%08x\n", read_uint32(sl->q_buf, 64));
553 DLOG("main_sp = 0x%08x\n", read_uint32(sl->q_buf, 68));
554 DLOG("process_sp = 0x%08x\n", read_uint32(sl->q_buf, 72));
555 DLOG("rw = 0x%08x\n", read_uint32(sl->q_buf, 76));
556 DLOG("rw2 = 0x%08x\n", read_uint32(sl->q_buf, 80));
559 void _stlink_usb_read_reg(stlink_t *sl, int r_idx, reg *regp) {
560 struct stlink_libusb * const slu = sl->backend_data;
561 unsigned char* const data = sl->q_buf;
562 unsigned char* const cmd = sl->c_buf;
565 uint32_t rep_len = 4;
566 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
568 cmd[i++] = STLINK_DEBUG_COMMAND;
569 cmd[i++] = STLINK_DEBUG_READREG;
570 cmd[i++] = (uint8_t) r_idx;
571 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
573 printf("[!] send_recv\n");
576 sl->q_len = (size_t) size;
577 stlink_print_data(sl);
578 r = read_uint32(sl->q_buf, 0);
579 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
589 regp->process_sp = r;
592 regp->rw = r; /* XXX ?(primask, basemask etc.) */
595 regp->rw2 = r; /* XXX ?(primask, basemask etc.) */
602 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
603 void _stlink_usb_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
606 sl->q_buf[0] = (unsigned char) r_idx;
607 for (int i = 1; i < 4; i++) {
611 _stlink_usb_write_mem32(sl, DCRSR, 4);
612 _stlink_usb_read_mem32(sl, DCRDR, 4);
614 r = read_uint32(sl->q_buf, 0);
615 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
619 regp->primask = (uint8_t) (r & 0xFF);
620 regp->basepri = (uint8_t) ((r>>8) & 0xFF);
621 regp->faultmask = (uint8_t) ((r>>16) & 0xFF);
622 regp->control = (uint8_t) ((r>>24) & 0xFF);
628 regp->s[r_idx - 0x40] = r;
633 void _stlink_usb_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
634 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
635 _stlink_usb_read_unsupported_reg(sl, 0x21, regp);
637 for (int i = 0; i < 32; i++) {
638 _stlink_usb_read_unsupported_reg(sl, 0x40+i, regp);
642 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
643 void _stlink_usb_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
644 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
645 /* These are held in the same register */
646 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
648 val = (uint8_t) (val>>24);
651 case 0x1C: /* control */
652 val = (((uint32_t) val) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
654 case 0x1D: /* faultmask */
655 val = (((uint32_t) regp->control) << 24) | (((uint32_t) val) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
657 case 0x1E: /* basepri */
658 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) val) << 8) | ((uint32_t) regp->primask);
660 case 0x1F: /* primask */
661 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) val);
668 write_uint32(sl->q_buf, val);
670 _stlink_usb_write_mem32(sl, DCRDR, 4);
672 sl->q_buf[0] = (unsigned char) r_idx;
677 _stlink_usb_write_mem32(sl, DCRSR, 4);
680 void _stlink_usb_write_reg(stlink_t *sl, uint32_t reg, int idx) {
681 struct stlink_libusb * const slu = sl->backend_data;
682 unsigned char* const data = sl->q_buf;
683 unsigned char* const cmd = sl->c_buf;
685 uint32_t rep_len = 2;
686 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
688 cmd[i++] = STLINK_DEBUG_COMMAND;
689 cmd[i++] = STLINK_DEBUG_WRITEREG;
691 write_uint32(&cmd[i], reg);
692 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
694 printf("[!] send_recv\n");
697 sl->q_len = (size_t) size;
698 stlink_print_data(sl);
701 stlink_backend_t _stlink_usb_backend = {
703 _stlink_usb_exit_debug_mode,
704 _stlink_usb_enter_swd_mode,
705 NULL, // no enter_jtag_mode here...
706 _stlink_usb_exit_dfu_mode,
709 _stlink_usb_jtag_reset,
713 _stlink_usb_read_debug32,
714 _stlink_usb_read_mem32,
715 _stlink_usb_write_debug32,
716 _stlink_usb_write_mem32,
717 _stlink_usb_write_mem8,
718 _stlink_usb_read_all_regs,
719 _stlink_usb_read_reg,
720 _stlink_usb_read_all_unsupported_regs,
721 _stlink_usb_read_unsupported_reg,
722 _stlink_usb_write_unsupported_reg,
723 _stlink_usb_write_reg,
725 _stlink_usb_current_mode,
726 _stlink_usb_force_debug,
727 _stlink_usb_target_voltage
731 stlink_t* stlink_open_usb(const int verbose, int reset) {
733 struct stlink_libusb* slu = NULL;
735 libusb_device** devs = NULL;
738 sl = malloc(sizeof (stlink_t));
739 slu = malloc(sizeof (struct stlink_libusb));
740 if (sl == NULL) goto on_error;
741 if (slu == NULL) goto on_error;
742 memset(sl, 0, sizeof (stlink_t));
743 memset(slu, 0, sizeof (struct stlink_libusb));
746 sl->backend = &_stlink_usb_backend;
747 sl->backend_data = slu;
749 sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
751 if (libusb_init(&(slu->libusb_ctx))) {
752 WLOG("failed to init libusb context, wrong version of libraries?\n");
756 libusb_device **list;
757 int cnt = libusb_get_device_list(slu->libusb_ctx, &list);
758 struct libusb_device_descriptor desc;
762 char *device = getenv("STLINK_DEVICE");
764 char *c = strchr(device,':');
766 WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
772 ILOG("bus %03d dev %03d\n",devBus, devAddr);
775 libusb_get_device_descriptor( list[cnt], &desc );
776 if (desc.idVendor!=USB_ST_VID) continue;
777 if (devBus && devAddr)
778 if ((libusb_get_bus_number(list[cnt])!=devBus) || (libusb_get_device_address(list[cnt])!=devAddr)) continue;
779 if ( (desc.idProduct == USB_STLINK_32L_PID) || (desc.idProduct == USB_STLINK_NUCLEO_PID) ) break;
780 if (desc.idProduct == USB_STLINK_PID) {
787 WLOG ("Couldn't find %s ST-Link/V2 devices\n",(devBus && devAddr)?"matched":"any");
790 int error = libusb_open(list[cnt], &slu->usb_handle);
792 WLOG("Error %d (%s) opening ST-Link/V2 device %03d:%03d\n",
793 error, strerror (errno), libusb_get_bus_number(list[cnt]), libusb_get_device_address(list[cnt]));
798 libusb_free_device_list(list, 1);
801 if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
804 r = libusb_detach_kernel_driver(slu->usb_handle, 0);
806 WLOG("libusb_detach_kernel_driver(() error %s\n", strerror(-r));
807 goto on_libusb_error;
811 if (libusb_get_configuration(slu->usb_handle, &config)) {
812 /* this may fail for a previous configured device */
813 WLOG("libusb_get_configuration()\n");
814 goto on_libusb_error;
818 printf("setting new configuration (%d -> 1)\n", config);
819 if (libusb_set_configuration(slu->usb_handle, 1)) {
820 /* this may fail for a previous configured device */
821 WLOG("libusb_set_configuration() failed\n");
822 goto on_libusb_error;
826 if (libusb_claim_interface(slu->usb_handle, 0)) {
827 WLOG("libusb_claim_interface() failed\n");
828 goto on_libusb_error;
831 slu->req_trans = libusb_alloc_transfer(0);
832 if (slu->req_trans == NULL) {
833 WLOG("libusb_alloc_transfer failed\n");
834 goto on_libusb_error;
837 slu->rep_trans = libusb_alloc_transfer(0);
838 if (slu->rep_trans == NULL) {
839 WLOG("libusb_alloc_transfer failed\n");
840 goto on_libusb_error;
843 // TODO - could use the scanning techniq from stm8 code here...
844 slu->ep_rep = 1 /* ep rep */ | LIBUSB_ENDPOINT_IN;
845 if (desc.idProduct == USB_STLINK_NUCLEO_PID) {
846 slu->ep_req = 1 /* ep req */ | LIBUSB_ENDPOINT_OUT;
848 slu->ep_req = 2 /* ep req */ | LIBUSB_ENDPOINT_OUT;
851 slu->sg_transfer_idx = 0;
852 // TODO - never used at the moment, always CMD_SIZE
853 slu->cmd_len = (slu->protocoll == 1)? STLINK_SG_SIZE: STLINK_CMD_SIZE;
857 if (stlink_current_mode(sl) == STLINK_DEV_DFU_MODE) {
858 ILOG("-- exit_dfu_mode\n");
859 stlink_exit_dfu_mode(sl);
862 if (stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE) {
863 stlink_enter_swd_mode(sl);
870 error = stlink_load_device_params(sl);
874 libusb_free_device_list(devs, 1);
887 libusb_exit(slu->libusb_ctx);
888 if (sl != NULL) free(sl);
889 if (slu != NULL) free(slu);