9 #include "stlink-common.h"
10 #include "stlink-usb.h"
11 #include "uglylogging.h"
13 #define LOG_TAG __FILE__
14 #define DLOG(format, args...) ugly_log(UDEBUG, LOG_TAG, format, ## args)
15 #define ILOG(format, args...) ugly_log(UINFO, LOG_TAG, format, ## args)
16 #define WLOG(format, args...) ugly_log(UWARN, LOG_TAG, format, ## args)
17 #define fatal(format, args...) ugly_log(UFATAL, LOG_TAG, format, ## args)
19 /* code from bsd timersub.h
20 http://www.gnu-darwin.org/www001/src/ports/net/libevnet/work/libevnet-0.3.8/libnostd/bsd/sys/time/timersub.h.html
23 #define timersub(a, b, r) do { \
24 (r)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
25 (r)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
26 if ((r)->tv_usec < 0) { \
28 (r)->tv_usec += 1000000; \
33 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
35 void _stlink_usb_close(stlink_t* sl) {
36 struct stlink_libusb * const handle = sl->backend_data;
37 // maybe we couldn't even get the usb device?
39 if (handle->req_trans != NULL)
40 libusb_free_transfer(handle->req_trans);
42 if (handle->rep_trans != NULL)
43 libusb_free_transfer(handle->rep_trans);
45 if (handle->usb_handle != NULL) {
46 libusb_close(handle->usb_handle);
49 libusb_exit(handle->libusb_ctx);
56 #define TRANS_FLAGS_IS_DONE (1 << 0)
57 #define TRANS_FLAGS_HAS_ERROR (1 << 1)
58 volatile unsigned long flags;
65 static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
66 struct trans_ctx * const ctx = trans->user_data;
68 if (trans->status != LIBUSB_TRANSFER_COMPLETED)
69 ctx->flags |= TRANS_FLAGS_HAS_ERROR;
71 ctx->flags |= TRANS_FLAGS_IS_DONE;
74 int submit_wait(struct stlink_libusb *slu, struct libusb_transfer * trans) {
78 struct trans_ctx trans_ctx;
79 enum libusb_error error;
83 /* brief intrusion inside the libusb interface */
84 trans->callback = on_trans_done;
85 trans->user_data = &trans_ctx;
87 if ((error = libusb_submit_transfer(trans))) {
88 printf("libusb_submit_transfer(%d)\n", error);
92 gettimeofday(&start, NULL);
94 while (trans_ctx.flags == 0) {
95 struct timeval timeout;
98 if (libusb_handle_events_timeout(slu->libusb_ctx, &timeout)) {
99 printf("libusb_handle_events()\n");
103 gettimeofday(&now, NULL);
104 timersub(&now, &start, &diff);
105 if (diff.tv_sec >= 3) {
106 printf("libusb_handle_events() timeout\n");
111 if (trans_ctx.flags & TRANS_FLAGS_HAS_ERROR) {
112 printf("libusb_handle_events() | has_error\n");
119 ssize_t send_recv(struct stlink_libusb* handle, int terminate,
120 unsigned char* txbuf, size_t txsize,
121 unsigned char* rxbuf, size_t rxsize) {
122 /* note: txbuf and rxbuf can point to the same area */
125 libusb_fill_bulk_transfer(handle->req_trans, handle->usb_handle,
132 if (submit_wait(handle, handle->req_trans)) return -1;
137 /* read the response */
139 libusb_fill_bulk_transfer(handle->rep_trans, handle->usb_handle,
140 handle->ep_rep, rxbuf, rxsize, NULL, NULL, 0);
142 if (submit_wait(handle, handle->rep_trans)) return -1;
143 res = handle->rep_trans->actual_length;
146 if ((handle->protocoll == 1) && terminate) {
147 /* Read the SG reply */
148 unsigned char sg_buf[13];
149 libusb_fill_bulk_transfer
150 (handle->rep_trans, handle->usb_handle,
151 handle->ep_rep, sg_buf, 13, NULL, NULL, 0);
152 res = submit_wait(handle, handle->rep_trans);
153 /* The STLink doesn't seem to evaluate the sequence number */
154 handle->sg_transfer_idx++;
158 return handle->rep_trans->actual_length;
161 static inline int send_only
162 (struct stlink_libusb* handle, int terminate,
163 unsigned char* txbuf, size_t txsize) {
164 return send_recv(handle, terminate, txbuf, txsize, NULL, 0);
168 static int fill_command
169 (stlink_t * sl, enum SCSI_Generic_Direction dir, uint32_t len) {
170 struct stlink_libusb * const slu = sl->backend_data;
171 unsigned char* const cmd = sl->c_buf;
173 memset(cmd, 0, sizeof (sl->c_buf));
174 if(slu->protocoll == 1) {
179 write_uint32(&cmd[i], slu->sg_transfer_idx);
180 write_uint32(&cmd[i + 4], len);
182 cmd[i++] = (dir == SG_DXFER_FROM_DEV)?0x80:0;
183 cmd[i++] = 0; /* Logical unit */
184 cmd[i++] = 0xa; /* Command length */
189 void _stlink_usb_version(stlink_t *sl) {
190 struct stlink_libusb * const slu = sl->backend_data;
191 unsigned char* const data = sl->q_buf;
192 unsigned char* const cmd = sl->c_buf;
194 uint32_t rep_len = 6;
195 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
197 cmd[i++] = STLINK_GET_VERSION;
199 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
201 printf("[!] send_recv\n");
206 uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
207 struct stlink_libusb * const slu = sl->backend_data;
208 unsigned char* const rdata = sl->q_buf;
209 unsigned char* const cmd = sl->c_buf;
211 const int rep_len = 8;
213 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
214 cmd[i++] = STLINK_DEBUG_COMMAND;
215 cmd[i++] = STLINK_JTAG_READDEBUG_32BIT;
216 write_uint32(&cmd[i], addr);
217 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
219 printf("[!] send_recv\n");
222 return read_uint32(rdata, 4);
225 void _stlink_usb_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data) {
226 struct stlink_libusb * const slu = sl->backend_data;
227 unsigned char* const rdata = sl->q_buf;
228 unsigned char* const cmd = sl->c_buf;
230 const int rep_len = 2;
232 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
233 cmd[i++] = STLINK_DEBUG_COMMAND;
234 cmd[i++] = STLINK_JTAG_WRITEDEBUG_32BIT;
235 write_uint32(&cmd[i], addr);
236 write_uint32(&cmd[i + 4], data);
237 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
239 printf("[!] send_recv\n");
244 void _stlink_usb_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
245 struct stlink_libusb * const slu = sl->backend_data;
246 unsigned char* const data = sl->q_buf;
247 unsigned char* const cmd = sl->c_buf;
249 int i = fill_command(sl, SG_DXFER_TO_DEV, len);
250 cmd[i++] = STLINK_DEBUG_COMMAND;
251 cmd[i++] = STLINK_DEBUG_WRITEMEM_32BIT;
252 write_uint32(&cmd[i], addr);
253 write_uint16(&cmd[i + 4], len);
254 send_only(slu, 0, cmd, slu->cmd_len);
256 send_only(slu, 1, data, len);
259 void _stlink_usb_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len) {
260 struct stlink_libusb * const slu = sl->backend_data;
261 unsigned char* const data = sl->q_buf;
262 unsigned char* const cmd = sl->c_buf;
264 int i = fill_command(sl, SG_DXFER_TO_DEV, 0);
265 cmd[i++] = STLINK_DEBUG_COMMAND;
266 cmd[i++] = STLINK_DEBUG_WRITEMEM_8BIT;
267 write_uint32(&cmd[i], addr);
268 write_uint16(&cmd[i + 4], len);
269 send_only(slu, 0, cmd, slu->cmd_len);
270 send_only(slu, 1, data, len);
274 int _stlink_usb_current_mode(stlink_t * sl) {
275 struct stlink_libusb * const slu = sl->backend_data;
276 unsigned char* const cmd = sl->c_buf;
277 unsigned char* const data = sl->q_buf;
280 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
282 cmd[i++] = STLINK_GET_CURRENT_MODE;
283 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
285 printf("[!] send_recv\n");
291 void _stlink_usb_core_id(stlink_t * sl) {
292 struct stlink_libusb * const slu = sl->backend_data;
293 unsigned char* const cmd = sl->c_buf;
294 unsigned char* const data = sl->q_buf;
297 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
299 cmd[i++] = STLINK_DEBUG_COMMAND;
300 cmd[i++] = STLINK_DEBUG_READCOREID;
302 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
304 printf("[!] send_recv\n");
308 sl->core_id = read_uint32(data, 0);
311 void _stlink_usb_status(stlink_t * sl) {
312 struct stlink_libusb * const slu = sl->backend_data;
313 unsigned char* const data = sl->q_buf;
314 unsigned char* const cmd = sl->c_buf;
317 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
319 cmd[i++] = STLINK_DEBUG_COMMAND;
320 cmd[i++] = STLINK_DEBUG_GETSTATUS;
322 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
324 printf("[!] send_recv\n");
329 void _stlink_usb_force_debug(stlink_t *sl) {
330 struct stlink_libusb *slu = sl->backend_data;
331 unsigned char* const data = sl->q_buf;
332 unsigned char* const cmd = sl->c_buf;
335 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
337 cmd[i++] = STLINK_DEBUG_COMMAND;
338 cmd[i++] = STLINK_DEBUG_FORCEDEBUG;
339 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
341 printf("[!] send_recv\n");
346 void _stlink_usb_enter_swd_mode(stlink_t * sl) {
347 struct stlink_libusb * const slu = sl->backend_data;
348 unsigned char* const cmd = sl->c_buf;
350 const int rep_len = 0;
351 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
353 cmd[i++] = STLINK_DEBUG_COMMAND;
354 cmd[i++] = STLINK_DEBUG_ENTER;
355 cmd[i++] = STLINK_DEBUG_ENTER_SWD;
357 size = send_only(slu, 1, cmd, slu->cmd_len);
359 printf("[!] send_recv\n");
364 void _stlink_usb_exit_dfu_mode(stlink_t* sl) {
365 struct stlink_libusb * const slu = sl->backend_data;
366 unsigned char* const cmd = sl->c_buf;
368 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
370 cmd[i++] = STLINK_DFU_COMMAND;
371 cmd[i++] = STLINK_DFU_EXIT;
373 size = send_only(slu, 1, cmd, slu->cmd_len);
375 printf("[!] send_recv\n");
381 * TODO - not convinced this does anything...
384 void _stlink_usb_reset(stlink_t * sl) {
385 struct stlink_libusb * const slu = sl->backend_data;
386 unsigned char* const data = sl->q_buf;
387 unsigned char* const cmd = sl->c_buf;
390 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
392 cmd[i++] = STLINK_DEBUG_COMMAND;
393 cmd[i++] = STLINK_DEBUG_RESETSYS;
395 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
397 printf("[!] send_recv\n");
403 void _stlink_usb_jtag_reset(stlink_t * sl, int value) {
404 struct stlink_libusb * const slu = sl->backend_data;
405 unsigned char* const data = sl->q_buf;
406 unsigned char* const cmd = sl->c_buf;
409 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
411 cmd[i++] = STLINK_DEBUG_COMMAND;
412 cmd[i++] = STLINK_JTAG_DRIVE_NRST;
413 cmd[i++] = (value)?0:1;
415 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
417 printf("[!] send_recv\n");
423 void _stlink_usb_step(stlink_t* sl) {
424 struct stlink_libusb * const slu = sl->backend_data;
425 unsigned char* const data = sl->q_buf;
426 unsigned char* const cmd = sl->c_buf;
429 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
431 cmd[i++] = STLINK_DEBUG_COMMAND;
432 cmd[i++] = STLINK_DEBUG_STEPCORE;
434 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
436 printf("[!] send_recv\n");
442 * This seems to do a good job of restarting things from the beginning?
445 void _stlink_usb_run(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_RUNCORE;
456 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
458 printf("[!] send_recv\n");
463 void _stlink_usb_exit_debug_mode(stlink_t *sl) {
464 struct stlink_libusb * const slu = sl->backend_data;
465 unsigned char* const cmd = sl->c_buf;
467 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
469 cmd[i++] = STLINK_DEBUG_COMMAND;
470 cmd[i++] = STLINK_DEBUG_EXIT;
472 size = send_only(slu, 1, cmd, slu->cmd_len);
474 printf("[!] send_only\n");
479 void _stlink_usb_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
480 struct stlink_libusb * const slu = sl->backend_data;
481 unsigned char* const data = sl->q_buf;
482 unsigned char* const cmd = sl->c_buf;
484 int i = fill_command(sl, SG_DXFER_FROM_DEV, len);
486 cmd[i++] = STLINK_DEBUG_COMMAND;
487 cmd[i++] = STLINK_DEBUG_READMEM_32BIT;
488 write_uint32(&cmd[i], addr);
489 write_uint16(&cmd[i + 4], len);
491 size = send_recv(slu, 1, cmd, slu->cmd_len, data, len);
493 printf("[!] send_recv\n");
497 sl->q_len = (size_t) size;
499 stlink_print_data(sl);
502 void _stlink_usb_read_all_regs(stlink_t *sl, reg *regp) {
503 struct stlink_libusb * const slu = sl->backend_data;
504 unsigned char* const cmd = sl->c_buf;
505 unsigned char* const data = sl->q_buf;
507 uint32_t rep_len = 84;
508 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
510 cmd[i++] = STLINK_DEBUG_COMMAND;
511 cmd[i++] = STLINK_DEBUG_READALLREGS;
512 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
514 printf("[!] send_recv\n");
517 sl->q_len = (size_t) size;
518 stlink_print_data(sl);
520 regp->r[i]= read_uint32(sl->q_buf, i*4);
521 regp->xpsr = read_uint32(sl->q_buf, 64);
522 regp->main_sp = read_uint32(sl->q_buf, 68);
523 regp->process_sp = read_uint32(sl->q_buf, 72);
524 regp->rw = read_uint32(sl->q_buf, 76);
525 regp->rw2 = read_uint32(sl->q_buf, 80);
529 DLOG("xpsr = 0x%08x\n", read_uint32(sl->q_buf, 64));
530 DLOG("main_sp = 0x%08x\n", read_uint32(sl->q_buf, 68));
531 DLOG("process_sp = 0x%08x\n", read_uint32(sl->q_buf, 72));
532 DLOG("rw = 0x%08x\n", read_uint32(sl->q_buf, 76));
533 DLOG("rw2 = 0x%08x\n", read_uint32(sl->q_buf, 80));
536 void _stlink_usb_read_reg(stlink_t *sl, int r_idx, reg *regp) {
537 struct stlink_libusb * const slu = sl->backend_data;
538 unsigned char* const data = sl->q_buf;
539 unsigned char* const cmd = sl->c_buf;
542 uint32_t rep_len = 4;
543 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
545 cmd[i++] = STLINK_DEBUG_COMMAND;
546 cmd[i++] = STLINK_DEBUG_READREG;
547 cmd[i++] = (uint8_t) r_idx;
548 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
550 printf("[!] send_recv\n");
553 sl->q_len = (size_t) size;
554 stlink_print_data(sl);
555 r = read_uint32(sl->q_buf, 0);
556 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
566 regp->process_sp = r;
569 regp->rw = r; /* XXX ?(primask, basemask etc.) */
572 regp->rw2 = r; /* XXX ?(primask, basemask etc.) */
579 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
580 void _stlink_usb_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
583 sl->q_buf[0] = (unsigned char) r_idx;
584 for (int i = 1; i < 4; i++) {
588 _stlink_usb_write_mem32(sl, DCRSR, 4);
589 _stlink_usb_read_mem32(sl, DCRDR, 4);
591 r = read_uint32(sl->q_buf, 0);
592 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
596 regp->primask = (uint8_t) (r & 0xFF);
597 regp->basepri = (uint8_t) ((r>>8) & 0xFF);
598 regp->faultmask = (uint8_t) ((r>>16) & 0xFF);
599 regp->control = (uint8_t) ((r>>24) & 0xFF);
605 regp->s[r_idx - 0x40] = r;
610 void _stlink_usb_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
611 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
612 _stlink_usb_read_unsupported_reg(sl, 0x21, regp);
614 for (int i = 0; i < 32; i++) {
615 _stlink_usb_read_unsupported_reg(sl, 0x40+i, regp);
619 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
620 void _stlink_usb_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
621 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
622 /* These are held in the same register */
623 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
625 val = (uint8_t) (val>>24);
628 case 0x1C: /* control */
629 val = (((uint32_t) val) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
631 case 0x1D: /* faultmask */
632 val = (((uint32_t) regp->control) << 24) | (((uint32_t) val) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
634 case 0x1E: /* basepri */
635 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) val) << 8) | ((uint32_t) regp->primask);
637 case 0x1F: /* primask */
638 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) val);
645 write_uint32(sl->q_buf, val);
647 _stlink_usb_write_mem32(sl, DCRDR, 4);
649 sl->q_buf[0] = (unsigned char) r_idx;
654 _stlink_usb_write_mem32(sl, DCRSR, 4);
657 void _stlink_usb_write_reg(stlink_t *sl, uint32_t reg, int idx) {
658 struct stlink_libusb * const slu = sl->backend_data;
659 unsigned char* const data = sl->q_buf;
660 unsigned char* const cmd = sl->c_buf;
662 uint32_t rep_len = 2;
663 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
665 cmd[i++] = STLINK_DEBUG_COMMAND;
666 cmd[i++] = STLINK_DEBUG_WRITEREG;
668 write_uint32(&cmd[i], reg);
669 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
671 printf("[!] send_recv\n");
674 sl->q_len = (size_t) size;
675 stlink_print_data(sl);
678 stlink_backend_t _stlink_usb_backend = {
680 _stlink_usb_exit_debug_mode,
681 _stlink_usb_enter_swd_mode,
682 NULL, // no enter_jtag_mode here...
683 _stlink_usb_exit_dfu_mode,
686 _stlink_usb_jtag_reset,
690 _stlink_usb_read_debug32,
691 _stlink_usb_read_mem32,
692 _stlink_usb_write_debug32,
693 _stlink_usb_write_mem32,
694 _stlink_usb_write_mem8,
695 _stlink_usb_read_all_regs,
696 _stlink_usb_read_reg,
697 _stlink_usb_read_all_unsupported_regs,
698 _stlink_usb_read_unsupported_reg,
699 _stlink_usb_write_unsupported_reg,
700 _stlink_usb_write_reg,
702 _stlink_usb_current_mode,
703 _stlink_usb_force_debug
707 stlink_t* stlink_open_usb(const int verbose) {
709 struct stlink_libusb* slu = NULL;
711 libusb_device** devs = NULL;
714 sl = malloc(sizeof (stlink_t));
715 slu = malloc(sizeof (struct stlink_libusb));
716 if (sl == NULL) goto on_error;
717 if (slu == NULL) goto on_error;
718 memset(sl, 0, sizeof (stlink_t));
719 memset(slu, 0, sizeof (struct stlink_libusb));
722 sl->backend = &_stlink_usb_backend;
723 sl->backend_data = slu;
725 sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
727 if (libusb_init(&(slu->libusb_ctx))) {
728 WLOG("failed to init libusb context, wrong version of libraries?\n");
732 libusb_device **list;
733 int cnt = libusb_get_device_list(slu->libusb_ctx, &list);
734 struct libusb_device_descriptor desc;
738 char *device = getenv("STLINK_DEVICE");
740 char *c = strchr(device,':');
742 WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
748 ILOG("bus %03d dev %03d\n",devBus, devAddr);
752 libusb_get_device_descriptor( list[cnt], &desc );
753 if (desc.idVendor!=USB_ST_VID) continue;
754 if (devBus && devAddr)
755 if ((libusb_get_bus_number(list[cnt])!=devBus) || (libusb_get_device_address(list[cnt])!=devAddr)) continue;
756 if (desc.idProduct == USB_STLINK_32L_PID) break;
757 if (desc.idProduct == USB_STLINK_PID) slu->protocoll = 1; break;
761 WLOG("Couldn't find %s ST-Link/V2 devices\n",(devBus && devAddr)?"matched":"any");
764 if( libusb_open(list[cnt], &slu->usb_handle) !=0){
765 WLOG("Couldn't open ST-Link/V2 device %03d:%03d\n",libusb_get_bus_number(list[cnt]), libusb_get_device_address(list[cnt]));
770 libusb_free_device_list(list, 1);
773 if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
776 r = libusb_detach_kernel_driver(slu->usb_handle, 0);
778 WLOG("libusb_detach_kernel_driver(() error %s\n", strerror(-r));
779 goto on_libusb_error;
783 if (libusb_get_configuration(slu->usb_handle, &config)) {
784 /* this may fail for a previous configured device */
785 WLOG("libusb_get_configuration()\n");
786 goto on_libusb_error;
790 printf("setting new configuration (%d -> 1)\n", config);
791 if (libusb_set_configuration(slu->usb_handle, 1)) {
792 /* this may fail for a previous configured device */
793 WLOG("libusb_set_configuration() failed\n");
794 goto on_libusb_error;
798 if (libusb_claim_interface(slu->usb_handle, 0)) {
799 WLOG("libusb_claim_interface() failed\n");
800 goto on_libusb_error;
803 slu->req_trans = libusb_alloc_transfer(0);
804 if (slu->req_trans == NULL) {
805 WLOG("libusb_alloc_transfer failed\n");
806 goto on_libusb_error;
809 slu->rep_trans = libusb_alloc_transfer(0);
810 if (slu->rep_trans == NULL) {
811 WLOG("libusb_alloc_transfer failed\n");
812 goto on_libusb_error;
814 // TODO - could use the scanning techniq from stm8 code here...
815 slu->ep_rep = 1 /* ep rep */ | LIBUSB_ENDPOINT_IN;
816 slu->ep_req = 2 /* ep req */ | LIBUSB_ENDPOINT_OUT;
818 slu->sg_transfer_idx = 0;
819 // TODO - never used at the moment, always CMD_SIZE
820 slu->cmd_len = (slu->protocoll == 1)? STLINK_SG_SIZE: STLINK_CMD_SIZE;
824 if (stlink_current_mode(sl) == STLINK_DEV_DFU_MODE) {
825 ILOG("-- exit_dfu_mode\n");
826 stlink_exit_dfu_mode(sl);
829 if (stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE) {
830 stlink_enter_swd_mode(sl);
834 stlink_load_device_params(sl);
841 libusb_free_device_list(devs, 1);
854 libusb_exit(slu->libusb_ctx);
855 if (sl != NULL) free(sl);
856 if (slu != NULL) free(slu);