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Fix buffer overflow in versaloon interface
[openocd.git] / src / jtag / drivers / vsllink.c
blobb9bda5d1e14e1ea574a52e12e105a18bd625c48b
1 /***************************************************************************
2 * Copyright (C) 2009-2010 by Simon Qian <SimonQian@SimonQian.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
19
20 /* Versaloon is a programming tool for multiple MCUs.
21 * It's distributed under GPLv3.
22 * You can find it at http://www.Versaloon.com/.
23 */
24
25 #ifdef HAVE_CONFIG_H
26 #include "config.h"
27 #endif
28
29 #include <jtag/interface.h>
30 #include <jtag/commands.h>
31 #include "usb_common.h"
32
33 #include "versaloon/versaloon_include.h"
34 #include "versaloon/versaloon.h"
35
36 static int vsllink_tms_offset;
37
38 struct pending_scan_result {
39 int src_offset;
40 int dest_offset;
41 int length; /* Number of bits to read */
42 struct scan_command *command; /* Corresponding scan command */
43 uint8_t *ack;
44 uint8_t *buffer;
45 bool last; /* indicate the last scan pending */
46 };
47
48 #define MAX_PENDING_SCAN_RESULTS 256
49
50 static int pending_scan_results_length;
51 static struct pending_scan_result
52 pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
53
54 /* Queue command functions */
55 static void vsllink_end_state(tap_state_t state);
56 static void vsllink_state_move(void);
57 static void vsllink_path_move(int num_states, tap_state_t *path);
58 static void vsllink_tms(int num_bits, const uint8_t *bits);
59 static void vsllink_runtest(int num_cycles);
60 static void vsllink_stableclocks(int num_cycles, int tms);
61 static void vsllink_scan(bool ir_scan, enum scan_type type,
62 uint8_t *buffer, int scan_size, struct scan_command *command);
63 static void vsllink_reset(int trst, int srst);
64
65 /* VSLLink tap buffer functions */
66 static void vsllink_tap_append_step(int tms, int tdi);
67 static void vsllink_tap_init(void);
68 static int vsllink_tap_execute(void);
69 static void vsllink_tap_ensure_pending(int scans);
70 static void vsllink_tap_append_scan(int length, uint8_t *buffer,
71 struct scan_command *command);
72
73 /* VSLLink lowlevel functions */
74 struct vsllink {
75 struct usb_dev_handle *usb_handle;
76 };
77
78 static struct vsllink *vsllink_usb_open(void);
79 static void vsllink_usb_close(struct vsllink *vsllink);
80
81 #if defined _DEBUG_JTAG_IO_
82 static void vsllink_debug_buffer(uint8_t *buffer, int length);
83 #endif
84
85 static int tap_length;
86 static int tap_buffer_size;
87 static uint8_t *tms_buffer;
88 static uint8_t *tdi_buffer;
89 static uint8_t *tdo_buffer;
90
91 struct vsllink *vsllink_handle;
92
93 static int vsllink_execute_queue(void)
94 {
95 struct jtag_command *cmd = jtag_command_queue;
96 int scan_size;
97 enum scan_type type;
98 uint8_t *buffer;
99
100 DEBUG_JTAG_IO("-------------------------------------"
101 " vsllink "
102 "-------------------------------------");
103
104 while (cmd != NULL) {
105 switch (cmd->type) {
106 case JTAG_RUNTEST:
107 DEBUG_JTAG_IO("runtest %i cycles, end in %s",
108 cmd->cmd.runtest->num_cycles,
109 tap_state_name(cmd->cmd.runtest->end_state));
110
111 vsllink_end_state(cmd->cmd.runtest->end_state);
112 vsllink_runtest(cmd->cmd.runtest->num_cycles);
113 break;
114
115 case JTAG_TLR_RESET:
116 DEBUG_JTAG_IO("statemove end in %s",
117 tap_state_name(cmd->cmd.statemove->end_state));
118
119 vsllink_end_state(cmd->cmd.statemove->end_state);
120 vsllink_state_move();
121 break;
122
123 case JTAG_PATHMOVE:
124 DEBUG_JTAG_IO("pathmove: %i states, end in %s",
125 cmd->cmd.pathmove->num_states,
126 tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
127
128 vsllink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
129 break;
130
131 case JTAG_SCAN:
132 DEBUG_JTAG_IO("JTAG Scan...");
133
134 vsllink_end_state(cmd->cmd.scan->end_state);
135
136 scan_size = jtag_build_buffer(
137 cmd->cmd.scan, &buffer);
138
139 if (cmd->cmd.scan->ir_scan)
140 DEBUG_JTAG_IO(
141 "JTAG Scan write IR(%d bits), "
142 "end in %s:",
143 scan_size,
144 tap_state_name(cmd->cmd.scan->end_state));
145
146 else
147 DEBUG_JTAG_IO(
148 "JTAG Scan write DR(%d bits), "
149 "end in %s:",
150 scan_size,
151 tap_state_name(cmd->cmd.scan->end_state));
152
153 #ifdef _DEBUG_JTAG_IO_
154 vsllink_debug_buffer(buffer,
155 DIV_ROUND_UP(scan_size, 8));
156 #endif
157
158 type = jtag_scan_type(cmd->cmd.scan);
159
160 vsllink_scan(cmd->cmd.scan->ir_scan,
161 type, buffer, scan_size,
162 cmd->cmd.scan);
163 break;
164
165 case JTAG_RESET:
166 DEBUG_JTAG_IO("reset trst: %i srst %i",
167 cmd->cmd.reset->trst,
168 cmd->cmd.reset->srst);
169
170 vsllink_tap_execute();
171
172 if (cmd->cmd.reset->trst == 1)
173 tap_set_state(TAP_RESET);
174
175 vsllink_reset(cmd->cmd.reset->trst,
176 cmd->cmd.reset->srst);
177 break;
178
179 case JTAG_SLEEP:
180 DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
181 vsllink_tap_execute();
182 jtag_sleep(cmd->cmd.sleep->us);
183 break;
184
185 case JTAG_STABLECLOCKS:
186 DEBUG_JTAG_IO("add %d clocks",
187 cmd->cmd.stableclocks->num_cycles);
188
189 switch (tap_get_state()) {
190 case TAP_RESET:
191 /* tms must be '1' to stay
192 * n TAP_RESET mode
193 */
194 scan_size = 1;
195 break;
196 case TAP_DRSHIFT:
197 case TAP_IDLE:
198 case TAP_DRPAUSE:
199 case TAP_IRSHIFT:
200 case TAP_IRPAUSE:
201 /* else, tms should be '0' */
202 scan_size = 0;
203 break;
204 /* above stable states are OK */
205 default:
206 LOG_ERROR("jtag_add_clocks() "
207 "in non-stable state \"%s\"",
208 tap_state_name(tap_get_state())
209 );
210 exit(-1);
211 }
212 vsllink_stableclocks(cmd->cmd.stableclocks->num_cycles, scan_size);
213 break;
214
215 case JTAG_TMS:
216 DEBUG_JTAG_IO("add %d jtag tms",
217 cmd->cmd.tms->num_bits);
218
219 vsllink_tms(cmd->cmd.tms->num_bits, cmd->cmd.tms->bits);
220 break;
221
222 default:
223 LOG_ERROR("BUG: unknown JTAG command type "
224 "encountered: %d", cmd->type);
225 exit(-1);
226 }
227 cmd = cmd->next;
228 }
229
230 return vsllink_tap_execute();
231 }
232
233 static int vsllink_speed(int speed)
234 {
235 versaloon_interface.adaptors.jtag_raw.config(0, (uint16_t)speed);
236 return versaloon_interface.adaptors.peripheral_commit();
237 }
238
239 static int vsllink_khz(int khz, int *jtag_speed)
240 {
241 *jtag_speed = khz;
242
243 return ERROR_OK;
244 }
245
246 static int vsllink_speed_div(int jtag_speed, int *khz)
247 {
248 *khz = jtag_speed;
249
250 return ERROR_OK;
251 }
252
253 static void vsllink_free_buffer(void)
254 {
255 if (tdi_buffer != NULL) {
256 free(tdi_buffer);
257 tdi_buffer = NULL;
258 }
259 if (tdo_buffer != NULL) {
260 free(tdo_buffer);
261 tdo_buffer = NULL;
262 }
263 if (tms_buffer != NULL) {
264 free(tms_buffer);
265 tms_buffer = NULL;
266 }
267 }
268
269 static int vsllink_quit(void)
270 {
271 versaloon_interface.adaptors.gpio.config(0, GPIO_SRST | GPIO_TRST,
272 0, 0, GPIO_SRST | GPIO_TRST);
273 versaloon_interface.adaptors.gpio.fini(0);
274 versaloon_interface.adaptors.jtag_raw.fini(0);
275 versaloon_interface.adaptors.peripheral_commit();
276 versaloon_interface.fini();
277
278 vsllink_free_buffer();
279 vsllink_usb_close(vsllink_handle);
280
281 return ERROR_OK;
282 }
283
284 static int vsllink_init(void)
285 {
286 vsllink_handle = vsllink_usb_open();
287 if (vsllink_handle == 0) {
288 LOG_ERROR("Can't find USB JTAG Interface!" \
289 "Please check connection and permissions.");
290 return ERROR_JTAG_INIT_FAILED;
291 }
292 LOG_DEBUG("vsllink found on %04X:%04X",
293 versaloon_interface.usb_setting.vid,
294 versaloon_interface.usb_setting.pid);
295 versaloon_usb_device_handle = vsllink_handle->usb_handle;
296
297 if (ERROR_OK != versaloon_interface.init())
298 return ERROR_FAIL;
299 if (versaloon_interface.usb_setting.buf_size < 32) {
300 versaloon_interface.fini();
301 return ERROR_FAIL;
302 }
303
304 /* malloc buffer size for tap */
305 tap_buffer_size = versaloon_interface.usb_setting.buf_size / 2 - 32;
306 vsllink_free_buffer();
307 tdi_buffer = (uint8_t *)malloc(tap_buffer_size);
308 tdo_buffer = (uint8_t *)malloc(tap_buffer_size);
309 tms_buffer = (uint8_t *)malloc(tap_buffer_size);
310 if ((NULL == tdi_buffer) || (NULL == tdo_buffer) || (NULL == tms_buffer)) {
311 vsllink_quit();
312 return ERROR_FAIL;
313 }
314
315 versaloon_interface.adaptors.jtag_raw.init(0);
316 versaloon_interface.adaptors.jtag_raw.config(0, jtag_get_speed_khz());
317 versaloon_interface.adaptors.gpio.init(0);
318 versaloon_interface.adaptors.gpio.config(0, GPIO_SRST | GPIO_TRST,
319 GPIO_TRST, GPIO_SRST, GPIO_SRST);
320 if (ERROR_OK != versaloon_interface.adaptors.peripheral_commit())
321 return ERROR_FAIL;
322
323 vsllink_reset(0, 0);
324 vsllink_tap_init();
325 return ERROR_OK;
326 }
327
328 /**************************************************************************
329 * Queue command implementations */
330
331 static void vsllink_end_state(tap_state_t state)
332 {
333 if (tap_is_state_stable(state))
334 tap_set_end_state(state);
335 else {
336 LOG_ERROR("BUG: %i is not a valid end state", state);
337 exit(-1);
338 }
339 }
340
341 /* Goes to the end state. */
342 static void vsllink_state_move(void)
343 {
344 int i;
345 uint8_t tms_scan = tap_get_tms_path(tap_get_state(),
346 tap_get_end_state());
347 uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(),
348 tap_get_end_state());
349
350 for (i = 0; i < tms_scan_bits; i++)
351 vsllink_tap_append_step((tms_scan >> i) & 1, 0);
352
353 tap_set_state(tap_get_end_state());
354 }
355
356 static void vsllink_path_move(int num_states, tap_state_t *path)
357 {
358 for (int i = 0; i < num_states; i++) {
359 if (path[i] == tap_state_transition(tap_get_state(), false))
360 vsllink_tap_append_step(0, 0);
361 else if (path[i] == tap_state_transition(tap_get_state(), true))
362 vsllink_tap_append_step(1, 0);
363 else {
364 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
365 tap_state_name(tap_get_state()),
366 tap_state_name(path[i]));
367 exit(-1);
368 }
369
370 tap_set_state(path[i]);
371 }
372
373 tap_set_end_state(tap_get_state());
374 }
375
376 static void vsllink_tms(int num_bits, const uint8_t *bits)
377 {
378 for (int i = 0; i < num_bits; i++)
379 vsllink_tap_append_step((bits[i / 8] >> (i % 8)) & 1, 0);
380 }
381
382 static void vsllink_stableclocks(int num_cycles, int tms)
383 {
384 while (num_cycles > 0) {
385 vsllink_tap_append_step(tms, 0);
386 num_cycles--;
387 }
388 }
389
390 static void vsllink_runtest(int num_cycles)
391 {
392 tap_state_t saved_end_state = tap_get_end_state();
393
394 if (tap_get_state() != TAP_IDLE) {
395 /* enter IDLE state */
396 vsllink_end_state(TAP_IDLE);
397 vsllink_state_move();
398 }
399
400 vsllink_stableclocks(num_cycles, 0);
401
402 /* post-process */
403 /* set end_state */
404 vsllink_end_state(saved_end_state);
405 if (tap_get_end_state() != tap_get_end_state())
406 vsllink_state_move();
407 }
408
409 static void vsllink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
410 int scan_size, struct scan_command *command)
411 {
412 tap_state_t saved_end_state;
413
414 saved_end_state = tap_get_end_state();
415
416 /* Move to appropriate scan state */
417 vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
418
419 if (tap_get_state() != tap_get_end_state())
420 vsllink_state_move();
421 vsllink_end_state(saved_end_state);
422
423 /* Scan */
424 vsllink_tap_append_scan(scan_size, buffer, command);
425
426 /* Goto Pause and record position to insert tms:0 */
427 vsllink_tap_append_step(0, 0);
428 vsllink_tms_offset = tap_length;
429
430 tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
431
432 if (tap_get_state() != tap_get_end_state())
433 vsllink_state_move();
434 }
435
436 static void vsllink_reset(int trst, int srst)
437 {
438 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
439
440 if (!srst)
441 versaloon_interface.adaptors.gpio.config(0, GPIO_SRST, 0, GPIO_SRST, GPIO_SRST);
442 else
443 versaloon_interface.adaptors.gpio.config(0, GPIO_SRST, GPIO_SRST, 0, 0);
444
445 if (!trst)
446 versaloon_interface.adaptors.gpio.out(0, GPIO_TRST, GPIO_TRST);
447 else
448 versaloon_interface.adaptors.gpio.out(0, GPIO_TRST, 0);
449 versaloon_interface.adaptors.peripheral_commit();
450 }
451
452 COMMAND_HANDLER(vsllink_handle_usb_vid_command)
453 {
454 if (CMD_ARGC != 1)
455 return ERROR_COMMAND_SYNTAX_ERROR;
456
457 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0],
458 versaloon_interface.usb_setting.vid);
459 return ERROR_OK;
460 }
461
462 COMMAND_HANDLER(vsllink_handle_usb_pid_command)
463 {
464 if (CMD_ARGC != 1)
465 return ERROR_COMMAND_SYNTAX_ERROR;
466 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0],
467 versaloon_interface.usb_setting.pid);
468 return ERROR_OK;
469 }
470
471 COMMAND_HANDLER(vsllink_handle_usb_bulkin_command)
472 {
473 if (CMD_ARGC != 1)
474 return ERROR_COMMAND_SYNTAX_ERROR;
475
476 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
477 versaloon_interface.usb_setting.ep_in);
478
479 versaloon_interface.usb_setting.ep_in |= 0x80;
480
481 return ERROR_OK;
482 }
483
484 COMMAND_HANDLER(vsllink_handle_usb_bulkout_command)
485 {
486 if (CMD_ARGC != 1)
487 return ERROR_COMMAND_SYNTAX_ERROR;
488
489 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
490 versaloon_interface.usb_setting.ep_out);
491
492 versaloon_interface.usb_setting.ep_out &= ~0x80;
493
494 return ERROR_OK;
495 }
496
497 COMMAND_HANDLER(vsllink_handle_usb_interface_command)
498 {
499 if (CMD_ARGC != 1)
500 return ERROR_COMMAND_SYNTAX_ERROR;
501
502 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
503 versaloon_interface.usb_setting.interface);
504 return ERROR_OK;
505 }
506
507 /**************************************************************************
508 * VSLLink tap functions */
509
510 static void vsllink_tap_init(void)
511 {
512 tap_length = 0;
513 pending_scan_results_length = 0;
514 vsllink_tms_offset = 0;
515 }
516
517 static void vsllink_tap_ensure_pending(int scans)
518 {
519 int available_scans =
520 MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
521
522 if (scans > available_scans)
523 vsllink_tap_execute();
524 }
525
526 static void vsllink_tap_append_step(int tms, int tdi)
527 {
528 int index_var = tap_length / 8;
529
530 int bit_index = tap_length % 8;
531 uint8_t bit = 1 << bit_index;
532
533 if (tms)
534 tms_buffer[index_var] |= bit;
535 else
536 tms_buffer[index_var] &= ~bit;
537
538 if (tdi)
539 tdi_buffer[index_var] |= bit;
540 else
541 tdi_buffer[index_var] &= ~bit;
542
543 tap_length++;
544
545 if (tap_buffer_size * 8 <= tap_length)
546 vsllink_tap_execute();
547 }
548
549 static void vsllink_tap_append_scan(int length, uint8_t *buffer,
550 struct scan_command *command)
551 {
552 struct pending_scan_result *pending_scan_result;
553 int len_tmp, len_all, i;
554
555 len_all = 0;
556 while (len_all < length) {
557 vsllink_tap_ensure_pending(1);
558 pending_scan_result =
559 &pending_scan_results_buffer[
560 pending_scan_results_length];
561
562 if ((length - len_all) > (tap_buffer_size * 8 - tap_length)) {
563 /* Use all memory available
564 vsllink_tap_append_step will commit automatically */
565 len_tmp = tap_buffer_size * 8 - tap_length;
566 pending_scan_result->last = false;
567 } else {
568 len_tmp = length - len_all;
569 pending_scan_result->last = true;
570 }
571 pending_scan_result->src_offset = tap_length;
572 pending_scan_result->dest_offset = len_all;
573 pending_scan_result->length = len_tmp;
574 pending_scan_result->command = command;
575 pending_scan_result->buffer = buffer;
576 pending_scan_results_length++;
577
578 for (i = 0; i < len_tmp; i++) {
579 vsllink_tap_append_step(((len_all + i) < length-1
580 ? 0 : 1),
581 (buffer[(len_all + i)/8]
582 >> ((len_all + i)%8)) & 1);
583 }
584
585 len_all += len_tmp;
586 }
587 }
588
589 static int vsllink_jtag_execute(void)
590 {
591 int i;
592 int result;
593
594 if (tap_length <= 0)
595 return ERROR_OK;
596
597 versaloon_interface.adaptors.jtag_raw.execute(0, tdi_buffer, tms_buffer,
598 tdo_buffer, tap_length);
599
600 result = versaloon_interface.adaptors.peripheral_commit();
601
602 if (result == ERROR_OK) {
603 for (i = 0; i < pending_scan_results_length; i++) {
604 struct pending_scan_result *pending_scan_result =
605 &pending_scan_results_buffer[i];
606 uint8_t *buffer = pending_scan_result->buffer;
607 int length = pending_scan_result->length;
608 int src_first = pending_scan_result->src_offset;
609 int dest_first = pending_scan_result->dest_offset;
610 bool last = pending_scan_result->last;
611
612 struct scan_command *command;
613
614 command = pending_scan_result->command;
615 buf_set_buf(tdo_buffer, src_first, buffer, dest_first, length);
616
617 #ifdef _DEBUG_JTAG_IO_
618 DEBUG_JTAG_IO(
619 "JTAG scan read(%d bits, from src %d bits to dest %d bits):",
620 length, src_first, dest_first);
621 vsllink_debug_buffer(buffer + dest_first / 8,
622 DIV_ROUND_UP(length, 7));
623 #endif
624
625 if (last) {
626 if (jtag_read_buffer(buffer, command)
627 != ERROR_OK) {
628 vsllink_tap_init();
629 return ERROR_JTAG_QUEUE_FAILED;
630 }
631
632 if (pending_scan_result->buffer != NULL)
633 free(pending_scan_result->buffer);
634 }
635 }
636 } else {
637 LOG_ERROR("vsllink_jtag_execute failure");
638 return ERROR_JTAG_QUEUE_FAILED;
639 }
640
641 vsllink_tap_init();
642
643 return ERROR_OK;
644 }
645
646 static int vsllink_tap_execute(void)
647 {
648 return vsllink_jtag_execute();
649 }
650
651 /****************************************************************************
652 * VSLLink USB low-level functions */
653
654 static uint8_t usb_check_string(usb_dev_handle *usb, uint8_t stringidx,
655 char *string, char *buff, uint16_t buf_size)
656 {
657 int len;
658 uint8_t alloced = 0;
659 uint8_t ret = 1;
660
661 if (NULL == buff) {
662 buf_size = 256;
663 buff = (char *)malloc(buf_size);
664 if (NULL == buff) {
665 ret = 0;
666 goto free_and_return;
667 }
668 alloced = 1;
669 }
670
671 strcpy(buff, "");
672 len = usb_get_string_simple(usb, stringidx, (char *)buff, buf_size);
673 if ((len < 0) || (len != ((int)strlen((const char *)buff)))) {
674 ret = 0;
675 goto free_and_return;
676 }
677
678 buff[len] = '\0';
679 if ((string != NULL) && strcmp((const char *)buff, string)) {
680 ret = 0;
681 goto free_and_return;
682 }
683
684 free_and_return:
685 if (alloced && (buff != NULL)) {
686 free(buff);
687 buff = NULL;
688 }
689 return ret;
690 }
691
692 static usb_dev_handle *find_usb_device(uint16_t VID, uint16_t PID,
693 uint8_t interface, int8_t serialindex, char *serialstring,
694 int8_t productindex, char *productstring)
695 {
696 usb_dev_handle *dev_handle = NULL;
697 struct usb_bus *busses;
698 struct usb_bus *bus;
699 struct usb_device *dev;
700
701 usb_init();
702 usb_find_busses();
703 usb_find_devices();
704 busses = usb_get_busses();
705
706 for (bus = busses; bus; bus = bus->next) {
707 for (dev = bus->devices; dev; dev = dev->next) {
708 if ((dev->descriptor.idVendor == VID)
709 && (dev->descriptor.idProduct == PID)) {
710 dev_handle = usb_open(dev);
711 if (NULL == dev_handle) {
712 LOG_ERROR("failed to open %04X:%04X, %s", VID, PID,
713 usb_strerror());
714 continue;
715 }
716
717 /* check description string */
718 if (((productstring != NULL) && (productindex >= 0)
719 && !usb_check_string(dev_handle, productindex,
720 productstring, NULL, 0))
721 || ((serialstring != NULL) && (serialindex >= 0)
722 && !usb_check_string(dev_handle, serialindex,
723 serialstring, NULL, 0))) {
724 usb_close(dev_handle);
725 dev_handle = NULL;
726 continue;
727 }
728
729 if (usb_claim_interface(dev_handle, interface) != 0) {
730 LOG_ERROR(ERRMSG_FAILURE_OPERATION_MESSAGE,
731 "claim interface", usb_strerror());
732 usb_close(dev_handle);
733 dev_handle = NULL;
734 continue;
735 }
736
737 if (dev_handle != NULL)
738 return dev_handle;
739 }
740 }
741 }
742
743 return dev_handle;
744 }
745
746 static struct vsllink *vsllink_usb_open(void)
747 {
748 usb_init();
749
750 struct usb_dev_handle *dev;
751
752 dev = find_usb_device(versaloon_interface.usb_setting.vid,
753 versaloon_interface.usb_setting.pid,
754 versaloon_interface.usb_setting.interface,
755 0, NULL, 2, "Versaloon");
756 if (NULL == dev)
757 return NULL;
758
759 struct vsllink *result = malloc(sizeof(struct vsllink));
760 result->usb_handle = dev;
761 return result;
762 }
763
764 static void vsllink_usb_close(struct vsllink *vsllink)
765 {
766 int ret;
767
768 ret = usb_release_interface(vsllink->usb_handle,
769 versaloon_interface.usb_setting.interface);
770 if (ret != 0) {
771 LOG_ERROR("fail to release interface %d, %d returned",
772 versaloon_interface.usb_setting.interface, ret);
773 exit(-1);
774 }
775
776 ret = usb_close(vsllink->usb_handle);
777 if (ret != 0) {
778 LOG_ERROR("fail to close usb, %d returned", ret);
779 exit(-1);
780 }
781
782 free(vsllink);
783 }
784
785 #define BYTES_PER_LINE 16
786
787 #if defined _DEBUG_JTAG_IO_
788 static void vsllink_debug_buffer(uint8_t *buffer, int length)
789 {
790 char line[81];
791 char s[4];
792 int i;
793 int j;
794
795 for (i = 0; i < length; i += BYTES_PER_LINE) {
796 snprintf(line, 5, "%04x", i);
797 for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
798 snprintf(s, 4, " %02x", buffer[j]);
799 strcat(line, s);
800 }
801 LOG_DEBUG("%s", line);
802 }
803 }
804 #endif /* _DEBUG_JTAG_IO_ */
805
806 static const struct command_registration vsllink_command_handlers[] = {
807 {
808 .name = "vsllink_usb_vid",
809 .handler = &vsllink_handle_usb_vid_command,
810 .mode = COMMAND_CONFIG,
811 },
812 {
813 .name = "vsllink_usb_pid",
814 .handler = &vsllink_handle_usb_pid_command,
815 .mode = COMMAND_CONFIG,
816 },
817 {
818 .name = "vsllink_usb_bulkin",
819 .handler = &vsllink_handle_usb_bulkin_command,
820 .mode = COMMAND_CONFIG,
821 },
822 {
823 .name = "vsllink_usb_bulkout",
824 .handler = &vsllink_handle_usb_bulkout_command,
825 .mode = COMMAND_CONFIG,
826 },
827 {
828 .name = "vsllink_usb_interface",
829 .handler = &vsllink_handle_usb_interface_command,
830 .mode = COMMAND_CONFIG,
831 },
832 COMMAND_REGISTRATION_DONE
833 };
834
835 static const char *vsllink_transports[] = {"jtag", "swd", NULL};
836
837 struct jtag_interface vsllink_interface = {
838 .name = "vsllink",
839 .supported = DEBUG_CAP_TMS_SEQ,
840 .commands = vsllink_command_handlers,
841 .transports = vsllink_transports,
842
843 .init = vsllink_init,
844 .quit = vsllink_quit,
845 .khz = vsllink_khz,
846 .speed = vsllink_speed,
847 .speed_div = vsllink_speed_div,
848 .execute_queue = vsllink_execute_queue,
849 };
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