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Remove FSF address from GPL notices
[openocd.git] / src / jtag / drivers / cmsis_dap_usb.c
blob7f335fb5e12f316cca1fb18a0025af44e797d3c3
1 /***************************************************************************
2 * Copyright (C) 2014 by Paul Fertser *
3 * fercerpav@gmail.com *
4 * *
5 * Copyright (C) 2013 by mike brown *
6 * mike@theshedworks.org.uk *
7 * *
8 * Copyright (C) 2013 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
20 * *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
23 ***************************************************************************/
24
25 #ifdef HAVE_CONFIG_H
26 #include "config.h"
27 #endif
28
29 #include <transport/transport.h>
30 #include <jtag/swd.h>
31 #include <jtag/interface.h>
32 #include <jtag/commands.h>
33 #include <jtag/tcl.h>
34
35 #include <hidapi.h>
36
37 /*
38 * See CMSIS-DAP documentation:
39 * Version 0.01 - Beta.
40 */
41
42 /* USB Config */
43
44 /* Known vid/pid pairs:
45 * VID 0xc251: Keil Software
46 * PID 0xf001: LPC-Link-II CMSIS_DAP
47 * PID 0xf002: OPEN-SDA CMSIS_DAP (Freedom Board)
48 * PID 0x2722: Keil ULINK2 CMSIS-DAP
49 *
50 * VID 0x0d28: mbed Software
51 * PID 0x0204: MBED CMSIS-DAP
52 */
53
54 #define MAX_USB_IDS 8
55 /* vid = pid = 0 marks the end of the list */
56 static uint16_t cmsis_dap_vid[MAX_USB_IDS + 1] = { 0 };
57 static uint16_t cmsis_dap_pid[MAX_USB_IDS + 1] = { 0 };
58 static wchar_t *cmsis_dap_serial;
59 static bool swd_mode;
60
61 #define PACKET_SIZE (64 + 1) /* 64 bytes plus report id */
62 #define USB_TIMEOUT 1000
63
64 /* CMSIS-DAP General Commands */
65 #define CMD_DAP_INFO 0x00
66 #define CMD_DAP_LED 0x01
67 #define CMD_DAP_CONNECT 0x02
68 #define CMD_DAP_DISCONNECT 0x03
69 #define CMD_DAP_WRITE_ABORT 0x08
70 #define CMD_DAP_DELAY 0x09
71 #define CMD_DAP_RESET_TARGET 0x0A
72
73 /* CMD_INFO */
74 #define INFO_ID_VID 0x00 /* string */
75 #define INFO_ID_PID 0x02 /* string */
76 #define INFO_ID_SERNUM 0x03 /* string */
77 #define INFO_ID_FW_VER 0x04 /* string */
78 #define INFO_ID_TD_VEND 0x05 /* string */
79 #define INFO_ID_TD_NAME 0x06 /* string */
80 #define INFO_ID_CAPS 0xf0 /* byte */
81 #define INFO_ID_PKT_CNT 0xfe /* byte */
82 #define INFO_ID_PKT_SZ 0xff /* short */
83
84 #define INFO_CAPS_SWD 0x01
85 #define INFO_CAPS_JTAG 0x02
86
87 /* CMD_LED */
88 #define LED_ID_CONNECT 0x00
89 #define LED_ID_RUN 0x01
90
91 #define LED_OFF 0x00
92 #define LED_ON 0x01
93
94 /* CMD_CONNECT */
95 #define CONNECT_DEFAULT 0x00
96 #define CONNECT_SWD 0x01
97 #define CONNECT_JTAG 0x02
98
99 /* CMSIS-DAP Common SWD/JTAG Commands */
100 #define CMD_DAP_DELAY 0x09
101 #define CMD_DAP_SWJ_PINS 0x10
102 #define CMD_DAP_SWJ_CLOCK 0x11
103 #define CMD_DAP_SWJ_SEQ 0x12
104
105 /*
106 * PINS
107 * Bit 0: SWCLK/TCK
108 * Bit 1: SWDIO/TMS
109 * Bit 2: TDI
110 * Bit 3: TDO
111 * Bit 5: nTRST
112 * Bit 7: nRESET
113 */
114
115 /* CMSIS-DAP SWD Commands */
116 #define CMD_DAP_SWD_CONFIGURE 0x13
117
118 /* CMSIS-DAP JTAG Commands */
119 #define CMD_DAP_JTAG_SEQ 0x14
120 #define CMD_DAP_JTAG_CONFIGURE 0x15
121 #define CMD_DAP_JTAG_IDCODE 0x16
122
123 /* CMSIS-DAP Transfer Commands */
124 #define CMD_DAP_TFER_CONFIGURE 0x04
125 #define CMD_DAP_TFER 0x05
126 #define CMD_DAP_TFER_BLOCK 0x06
127 #define CMD_DAP_TFER_ABORT 0x07
128
129 /* DAP Status Code */
130 #define DAP_OK 0
131 #define DAP_ERROR 0xFF
132
133 /* CMSIS-DAP Vendor Commands
134 * None as yet... */
135
136 static const char * const info_caps_str[] = {
137 "SWD Supported",
138 "JTAG Supported"
139 };
140
141 /* max clock speed (kHz) */
142 #define DAP_MAX_CLOCK 5000
143
144 struct cmsis_dap {
145 hid_device *dev_handle;
146 uint16_t packet_size;
147 uint16_t packet_count;
148 uint8_t *packet_buffer;
149 uint8_t caps;
150 uint8_t mode;
151 };
152
153 struct pending_transfer_result {
154 uint8_t cmd;
155 uint32_t data;
156 void *buffer;
157 };
158
159 static int pending_transfer_count, pending_queue_len;
160 static struct pending_transfer_result *pending_transfers;
161
162 static int queued_retval;
163
164 static struct cmsis_dap *cmsis_dap_handle;
165
166 static int cmsis_dap_usb_open(void)
167 {
168 hid_device *dev = NULL;
169 int i;
170 struct hid_device_info *devs, *cur_dev;
171 unsigned short target_vid, target_pid;
172 wchar_t *target_serial = NULL;
173
174 bool found = false;
175 bool serial_found = false;
176
177 target_vid = 0;
178 target_pid = 0;
179
180 /*
181 * The CMSIS-DAP specification stipulates:
182 * "The Product String must contain "CMSIS-DAP" somewhere in the string. This is used by the
183 * debuggers to identify a CMSIS-DAP compliant Debug Unit that is connected to a host computer."
184 */
185 devs = hid_enumerate(0x0, 0x0);
186 cur_dev = devs;
187 while (NULL != cur_dev) {
188 if (0 == cmsis_dap_vid[0]) {
189 if (NULL == cur_dev->product_string) {
190 LOG_DEBUG("Cannot read product string of device 0x%x:0x%x",
191 cur_dev->vendor_id, cur_dev->product_id);
192 } else {
193 if (wcsstr(cur_dev->product_string, L"CMSIS-DAP")) {
194 /* if the user hasn't specified VID:PID *and*
195 * product string contains "CMSIS-DAP", pick it
196 */
197 found = true;
198 }
199 }
200 } else {
201 /* otherwise, exhaustively compare against all VID:PID in list */
202 for (i = 0; cmsis_dap_vid[i] || cmsis_dap_pid[i]; i++) {
203 if ((cmsis_dap_vid[i] == cur_dev->vendor_id) && (cmsis_dap_pid[i] == cur_dev->product_id))
204 found = true;
205 }
206
207 if (cmsis_dap_vid[i] || cmsis_dap_pid[i])
208 found = true;
209 }
210
211 if (found) {
212 /* we have found an adapter, so exit further checks */
213 /* check serial number matches if given */
214 if (cmsis_dap_serial != NULL) {
215 if ((cur_dev->serial_number != NULL) && wcscmp(cmsis_dap_serial, cur_dev->serial_number) == 0) {
216 serial_found = true;
217 break;
218 }
219 } else
220 break;
221
222 found = false;
223 }
224
225 cur_dev = cur_dev->next;
226 }
227
228 if (NULL != cur_dev) {
229 target_vid = cur_dev->vendor_id;
230 target_pid = cur_dev->product_id;
231 if (serial_found)
232 target_serial = cmsis_dap_serial;
233 }
234
235 hid_free_enumeration(devs);
236
237 if (target_vid == 0 && target_pid == 0) {
238 LOG_ERROR("unable to find CMSIS-DAP device");
239 return ERROR_FAIL;
240 }
241
242 if (hid_init() != 0) {
243 LOG_ERROR("unable to open HIDAPI");
244 return ERROR_FAIL;
245 }
246
247 dev = hid_open(target_vid, target_pid, target_serial);
248
249 if (dev == NULL) {
250 LOG_ERROR("unable to open CMSIS-DAP device 0x%x:0x%x", target_vid, target_pid);
251 return ERROR_FAIL;
252 }
253
254 struct cmsis_dap *dap = malloc(sizeof(struct cmsis_dap));
255 if (dap == NULL) {
256 LOG_ERROR("unable to allocate memory");
257 return ERROR_FAIL;
258 }
259
260 dap->dev_handle = dev;
261 dap->caps = 0;
262 dap->mode = 0;
263
264 cmsis_dap_handle = dap;
265
266 /* allocate default packet buffer, may be changed later.
267 * currently with HIDAPI we have no way of getting the output report length
268 * without this info we cannot communicate with the adapter.
269 * For the moment we ahve to hard code the packet size */
270
271 int packet_size = PACKET_SIZE;
272
273 /* atmel cmsis-dap uses 512 byte reports */
274 /* TODO: HID report descriptor should be parsed instead of
275 * hardcoding a match by VID */
276 if (target_vid == 0x03eb)
277 packet_size = 512 + 1;
278
279 cmsis_dap_handle->packet_buffer = malloc(packet_size);
280 cmsis_dap_handle->packet_size = packet_size;
281
282 if (cmsis_dap_handle->packet_buffer == NULL) {
283 LOG_ERROR("unable to allocate memory");
284 return ERROR_FAIL;
285 }
286
287 return ERROR_OK;
288 }
289
290 static void cmsis_dap_usb_close(struct cmsis_dap *dap)
291 {
292 hid_close(dap->dev_handle);
293 hid_exit();
294
295 free(cmsis_dap_handle->packet_buffer);
296 free(cmsis_dap_handle);
297 cmsis_dap_handle = NULL;
298 free(cmsis_dap_serial);
299 cmsis_dap_serial = NULL;
300 free(pending_transfers);
301 pending_transfers = NULL;
302
303 return;
304 }
305
306 /* Send a message and receive the reply */
307 static int cmsis_dap_usb_xfer(struct cmsis_dap *dap, int txlen)
308 {
309 /* Pad the rest of the TX buffer with 0's */
310 memset(dap->packet_buffer + txlen, 0, dap->packet_size - txlen);
311
312 /* write data to device */
313 int retval = hid_write(dap->dev_handle, dap->packet_buffer, dap->packet_size);
314 if (retval == -1) {
315 LOG_ERROR("error writing data: %ls", hid_error(dap->dev_handle));
316 return ERROR_FAIL;
317 }
318
319 /* get reply */
320 retval = hid_read_timeout(dap->dev_handle, dap->packet_buffer, dap->packet_size, USB_TIMEOUT);
321 if (retval == -1 || retval == 0) {
322 LOG_DEBUG("error reading data: %ls", hid_error(dap->dev_handle));
323 return ERROR_FAIL;
324 }
325
326 return ERROR_OK;
327 }
328
329 static int cmsis_dap_cmd_DAP_SWJ_Pins(uint8_t pins, uint8_t mask, uint32_t delay, uint8_t *input)
330 {
331 int retval;
332 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
333
334 buffer[0] = 0; /* report number */
335 buffer[1] = CMD_DAP_SWJ_PINS;
336 buffer[2] = pins;
337 buffer[3] = mask;
338 buffer[4] = delay & 0xff;
339 buffer[5] = (delay >> 8) & 0xff;
340 buffer[6] = (delay >> 16) & 0xff;
341 buffer[7] = (delay >> 24) & 0xff;
342 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 8);
343
344 if (retval != ERROR_OK) {
345 LOG_ERROR("CMSIS-DAP command CMD_DAP_SWJ_PINS failed.");
346 return ERROR_JTAG_DEVICE_ERROR;
347 }
348
349 if (input)
350 *input = buffer[1];
351
352 return ERROR_OK;
353 }
354
355 static int cmsis_dap_cmd_DAP_SWJ_Clock(uint32_t swj_clock)
356 {
357 int retval;
358 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
359
360 /* set clock in Hz */
361 swj_clock *= 1000;
362 buffer[0] = 0; /* report number */
363 buffer[1] = CMD_DAP_SWJ_CLOCK;
364 buffer[2] = swj_clock & 0xff;
365 buffer[3] = (swj_clock >> 8) & 0xff;
366 buffer[4] = (swj_clock >> 16) & 0xff;
367 buffer[5] = (swj_clock >> 24) & 0xff;
368 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 6);
369
370 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
371 LOG_ERROR("CMSIS-DAP command CMD_DAP_SWJ_CLOCK failed.");
372 return ERROR_JTAG_DEVICE_ERROR;
373 }
374
375 return ERROR_OK;
376 }
377
378 static int cmsis_dap_cmd_DAP_Info(uint8_t info, uint8_t **data)
379 {
380 int retval;
381 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
382
383 buffer[0] = 0; /* report number */
384 buffer[1] = CMD_DAP_INFO;
385 buffer[2] = info;
386 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
387
388 if (retval != ERROR_OK) {
389 LOG_ERROR("CMSIS-DAP command CMD_INFO failed.");
390 return ERROR_JTAG_DEVICE_ERROR;
391 }
392
393 *data = &(buffer[1]);
394
395 return ERROR_OK;
396 }
397
398 static int cmsis_dap_cmd_DAP_LED(uint8_t leds)
399 {
400 int retval;
401 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
402
403 buffer[0] = 0; /* report number */
404 buffer[1] = CMD_DAP_LED;
405 buffer[2] = 0x00;
406 buffer[3] = leds;
407 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 4);
408
409 if (retval != ERROR_OK || buffer[1] != 0x00) {
410 LOG_ERROR("CMSIS-DAP command CMD_LED failed.");
411 return ERROR_JTAG_DEVICE_ERROR;
412 }
413
414 return ERROR_OK;
415 }
416
417 static int cmsis_dap_cmd_DAP_Connect(uint8_t mode)
418 {
419 int retval;
420 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
421
422 buffer[0] = 0; /* report number */
423 buffer[1] = CMD_DAP_CONNECT;
424 buffer[2] = mode;
425 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
426
427 if (retval != ERROR_OK) {
428 LOG_ERROR("CMSIS-DAP command CMD_CONNECT failed.");
429 return ERROR_JTAG_DEVICE_ERROR;
430 }
431
432 if (buffer[1] != mode) {
433 LOG_ERROR("CMSIS-DAP failed to connect in mode (%d)", mode);
434 return ERROR_JTAG_DEVICE_ERROR;
435 }
436
437 return ERROR_OK;
438 }
439
440 static int cmsis_dap_cmd_DAP_Disconnect(void)
441 {
442 int retval;
443 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
444
445 buffer[0] = 0; /* report number */
446 buffer[1] = CMD_DAP_DISCONNECT;
447 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 2);
448
449 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
450 LOG_ERROR("CMSIS-DAP command CMD_DISCONNECT failed.");
451 return ERROR_JTAG_DEVICE_ERROR;
452 }
453
454 return ERROR_OK;
455 }
456
457 static int cmsis_dap_cmd_DAP_TFER_Configure(uint8_t idle, uint16_t retry_count, uint16_t match_retry)
458 {
459 int retval;
460 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
461
462 buffer[0] = 0; /* report number */
463 buffer[1] = CMD_DAP_TFER_CONFIGURE;
464 buffer[2] = idle;
465 buffer[3] = retry_count & 0xff;
466 buffer[4] = (retry_count >> 8) & 0xff;
467 buffer[5] = match_retry & 0xff;
468 buffer[6] = (match_retry >> 8) & 0xff;
469 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
470
471 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
472 LOG_ERROR("CMSIS-DAP command CMD_TFER_Configure failed.");
473 return ERROR_JTAG_DEVICE_ERROR;
474 }
475
476 return ERROR_OK;
477 }
478
479 static int cmsis_dap_cmd_DAP_SWD_Configure(uint8_t cfg)
480 {
481 int retval;
482 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
483
484 buffer[0] = 0; /* report number */
485 buffer[1] = CMD_DAP_SWD_CONFIGURE;
486 buffer[2] = cfg;
487 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
488
489 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
490 LOG_ERROR("CMSIS-DAP command CMD_SWD_Configure failed.");
491 return ERROR_JTAG_DEVICE_ERROR;
492 }
493
494 return ERROR_OK;
495 }
496
497 #if 0
498 static int cmsis_dap_cmd_DAP_Delay(uint16_t delay_us)
499 {
500 int retval;
501 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
502
503 buffer[0] = 0; /* report number */
504 buffer[1] = CMD_DAP_DELAY;
505 buffer[2] = delay_us & 0xff;
506 buffer[3] = (delay_us >> 8) & 0xff;
507 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 4);
508
509 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
510 LOG_ERROR("CMSIS-DAP command CMD_Delay failed.");
511 return ERROR_JTAG_DEVICE_ERROR;
512 }
513
514 return ERROR_OK;
515 }
516 #endif
517
518 static int cmsis_dap_swd_run_queue(void)
519 {
520 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
521
522 LOG_DEBUG("Executing %d queued transactions", pending_transfer_count);
523
524 if (queued_retval != ERROR_OK) {
525 LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
526 goto skip;
527 }
528
529 if (!pending_transfer_count)
530 goto skip;
531
532 size_t idx = 0;
533 buffer[idx++] = 0; /* report number */
534 buffer[idx++] = CMD_DAP_TFER;
535 buffer[idx++] = 0x00; /* DAP Index */
536 buffer[idx++] = pending_transfer_count;
537
538 for (int i = 0; i < pending_transfer_count; i++) {
539 uint8_t cmd = pending_transfers[i].cmd;
540 uint32_t data = pending_transfers[i].data;
541
542 LOG_DEBUG("%s %s reg %x %"PRIx32,
543 cmd & SWD_CMD_APnDP ? "AP" : "DP",
544 cmd & SWD_CMD_RnW ? "read" : "write",
545 (cmd & SWD_CMD_A32) >> 1, data);
546
547 /* When proper WAIT handling is implemented in the
548 * common SWD framework, this kludge can be
549 * removed. However, this might lead to minor
550 * performance degradation as the adapter wouldn't be
551 * able to automatically retry anything (because ARM
552 * has forgotten to implement sticky error flags
553 * clearing). See also comments regarding
554 * cmsis_dap_cmd_DAP_TFER_Configure() and
555 * cmsis_dap_cmd_DAP_SWD_Configure() in
556 * cmsis_dap_init().
557 */
558 if (!(cmd & SWD_CMD_RnW) &&
559 !(cmd & SWD_CMD_APnDP) &&
560 (cmd & SWD_CMD_A32) >> 1 == DP_CTRL_STAT &&
561 (data & CORUNDETECT)) {
562 LOG_DEBUG("refusing to enable sticky overrun detection");
563 data &= ~CORUNDETECT;
564 }
565
566 buffer[idx++] = (cmd >> 1) & 0x0f;
567 if (!(cmd & SWD_CMD_RnW)) {
568 buffer[idx++] = (data) & 0xff;
569 buffer[idx++] = (data >> 8) & 0xff;
570 buffer[idx++] = (data >> 16) & 0xff;
571 buffer[idx++] = (data >> 24) & 0xff;
572 }
573 }
574
575 queued_retval = cmsis_dap_usb_xfer(cmsis_dap_handle, idx);
576 if (queued_retval != ERROR_OK)
577 goto skip;
578
579 idx = 2;
580 uint8_t ack = buffer[idx] & 0x07;
581 if (ack != SWD_ACK_OK || (buffer[idx] & 0x08)) {
582 LOG_DEBUG("SWD ack not OK: %d %s", buffer[idx-1],
583 ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK");
584 queued_retval = ack == SWD_ACK_WAIT ? ERROR_WAIT : ERROR_FAIL;
585 goto skip;
586 }
587 idx++;
588
589 if (pending_transfer_count != buffer[1])
590 LOG_ERROR("CMSIS-DAP transfer count mismatch: expected %d, got %d",
591 pending_transfer_count, buffer[1]);
592
593 for (int i = 0; i < buffer[1]; i++) {
594 if (pending_transfers[i].cmd & SWD_CMD_RnW) {
595 static uint32_t last_read;
596 uint32_t data = le_to_h_u32(&buffer[idx]);
597 uint32_t tmp = data;
598 idx += 4;
599
600 LOG_DEBUG("Read result: %"PRIx32, data);
601
602 /* Imitate posted AP reads */
603 if ((pending_transfers[i].cmd & SWD_CMD_APnDP) ||
604 ((pending_transfers[i].cmd & SWD_CMD_A32) >> 1 == DP_RDBUFF)) {
605 tmp = last_read;
606 last_read = data;
607 }
608
609 if (pending_transfers[i].buffer)
610 *(uint32_t *)pending_transfers[i].buffer = tmp;
611 }
612 }
613
614 skip:
615 pending_transfer_count = 0;
616 int retval = queued_retval;
617 queued_retval = ERROR_OK;
618
619 return retval;
620 }
621
622 static void cmsis_dap_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data)
623 {
624 if (pending_transfer_count == pending_queue_len) {
625 /* Not enough room in the queue. Run the queue. */
626 queued_retval = cmsis_dap_swd_run_queue();
627 }
628
629 if (queued_retval != ERROR_OK)
630 return;
631
632 pending_transfers[pending_transfer_count].data = data;
633 pending_transfers[pending_transfer_count].cmd = cmd;
634 if (cmd & SWD_CMD_RnW) {
635 /* Queue a read transaction */
636 pending_transfers[pending_transfer_count].buffer = dst;
637 }
638 pending_transfer_count++;
639 }
640
641 static void cmsis_dap_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
642 {
643 assert(!(cmd & SWD_CMD_RnW));
644 cmsis_dap_swd_queue_cmd(cmd, NULL, value);
645 }
646
647 static void cmsis_dap_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
648 {
649 assert(cmd & SWD_CMD_RnW);
650 cmsis_dap_swd_queue_cmd(cmd, value, 0);
651 }
652
653 static int cmsis_dap_get_version_info(void)
654 {
655 uint8_t *data;
656
657 /* INFO_ID_FW_VER - string */
658 int retval = cmsis_dap_cmd_DAP_Info(INFO_ID_FW_VER, &data);
659 if (retval != ERROR_OK)
660 return retval;
661
662 if (data[0]) /* strlen */
663 LOG_INFO("CMSIS-DAP: FW Version = %s", &data[1]);
664
665 return ERROR_OK;
666 }
667
668 static int cmsis_dap_get_caps_info(void)
669 {
670 uint8_t *data;
671
672 /* INFO_ID_CAPS - byte */
673 int retval = cmsis_dap_cmd_DAP_Info(INFO_ID_CAPS, &data);
674 if (retval != ERROR_OK)
675 return retval;
676
677 if (data[0] == 1) {
678 uint8_t caps = data[1];
679
680 cmsis_dap_handle->caps = caps;
681
682 if (caps & INFO_CAPS_SWD)
683 LOG_INFO("CMSIS-DAP: %s", info_caps_str[0]);
684 if (caps & INFO_CAPS_JTAG)
685 LOG_INFO("CMSIS-DAP: %s", info_caps_str[1]);
686 }
687
688 return ERROR_OK;
689 }
690
691 static int cmsis_dap_get_status(void)
692 {
693 uint8_t d;
694
695 int retval = cmsis_dap_cmd_DAP_SWJ_Pins(0, 0, 0, &d);
696
697 if (retval == ERROR_OK) {
698 LOG_INFO("SWCLK/TCK = %d SWDIO/TMS = %d TDI = %d TDO = %d nTRST = %d nRESET = %d",
699 (d & (0x01 << 0)) ? 1 : 0, /* Bit 0: SWCLK/TCK */
700 (d & (0x01 << 1)) ? 1 : 0, /* Bit 1: SWDIO/TMS */
701 (d & (0x01 << 2)) ? 1 : 0, /* Bit 2: TDI */
702 (d & (0x01 << 3)) ? 1 : 0, /* Bit 3: TDO */
703 (d & (0x01 << 5)) ? 1 : 0, /* Bit 5: nTRST */
704 (d & (0x01 << 7)) ? 1 : 0); /* Bit 7: nRESET */
705 }
706
707 return retval;
708 }
709
710 static int cmsis_dap_swd_switch_seq(enum swd_special_seq seq)
711 {
712 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
713 const uint8_t *s;
714 unsigned int s_len;
715 int retval;
716
717 /* First disconnect before connecting, Atmel EDBG needs it for SAMD/R/L/C */
718 cmsis_dap_cmd_DAP_Disconnect();
719
720 /* When we are reconnecting, DAP_Connect needs to be rerun, at
721 * least on Keil ULINK-ME */
722 retval = cmsis_dap_cmd_DAP_Connect(seq == LINE_RESET || seq == JTAG_TO_SWD ?
723 CONNECT_SWD : CONNECT_JTAG);
724 if (retval != ERROR_OK)
725 return retval;
726
727 switch (seq) {
728 case LINE_RESET:
729 LOG_DEBUG("SWD line reset");
730 s = swd_seq_line_reset;
731 s_len = swd_seq_line_reset_len;
732 break;
733 case JTAG_TO_SWD:
734 LOG_DEBUG("JTAG-to-SWD");
735 s = swd_seq_jtag_to_swd;
736 s_len = swd_seq_jtag_to_swd_len;
737 break;
738 case SWD_TO_JTAG:
739 LOG_DEBUG("SWD-to-JTAG");
740 s = swd_seq_swd_to_jtag;
741 s_len = swd_seq_swd_to_jtag_len;
742 break;
743 default:
744 LOG_ERROR("Sequence %d not supported", seq);
745 return ERROR_FAIL;
746 }
747
748 buffer[0] = 0; /* report number */
749 buffer[1] = CMD_DAP_SWJ_SEQ;
750 buffer[2] = s_len;
751 bit_copy(&buffer[3], 0, s, 0, s_len);
752
753 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, DIV_ROUND_UP(s_len, 8) + 3);
754
755 if (retval != ERROR_OK || buffer[1] != DAP_OK)
756 return ERROR_FAIL;
757
758 return ERROR_OK;
759 }
760
761 static int cmsis_dap_swd_open(void)
762 {
763 int retval;
764
765 if (cmsis_dap_handle == NULL) {
766 /* SWD init */
767 retval = cmsis_dap_usb_open();
768 if (retval != ERROR_OK)
769 return retval;
770
771 retval = cmsis_dap_get_caps_info();
772 if (retval != ERROR_OK)
773 return retval;
774 }
775
776 if (!(cmsis_dap_handle->caps & INFO_CAPS_SWD)) {
777 LOG_ERROR("CMSIS-DAP: SWD not supported");
778 return ERROR_JTAG_DEVICE_ERROR;
779 }
780
781 retval = cmsis_dap_cmd_DAP_Connect(CONNECT_SWD);
782 if (retval != ERROR_OK)
783 return retval;
784
785 /* Add more setup here.??... */
786
787 LOG_INFO("CMSIS-DAP: Interface Initialised (SWD)");
788 return ERROR_OK;
789 }
790
791 static int cmsis_dap_init(void)
792 {
793 int retval;
794 uint8_t *data;
795
796 if (swd_mode) {
797 retval = cmsis_dap_swd_open();
798 if (retval != ERROR_OK)
799 return retval;
800 }
801
802 if (cmsis_dap_handle == NULL) {
803
804 /* JTAG init */
805 retval = cmsis_dap_usb_open();
806 if (retval != ERROR_OK)
807 return retval;
808
809 retval = cmsis_dap_get_caps_info();
810 if (retval != ERROR_OK)
811 return retval;
812
813 /* Connect in JTAG mode */
814 if (!(cmsis_dap_handle->caps & INFO_CAPS_JTAG)) {
815 LOG_ERROR("CMSIS-DAP: JTAG not supported");
816 return ERROR_JTAG_DEVICE_ERROR;
817 }
818
819 retval = cmsis_dap_cmd_DAP_Connect(CONNECT_JTAG);
820 if (retval != ERROR_OK)
821 return retval;
822
823 LOG_INFO("CMSIS-DAP: Interface Initialised (JTAG)");
824 }
825
826 retval = cmsis_dap_get_version_info();
827 if (retval != ERROR_OK)
828 return retval;
829
830 /* INFO_ID_PKT_SZ - short */
831 retval = cmsis_dap_cmd_DAP_Info(INFO_ID_PKT_SZ, &data);
832 if (retval != ERROR_OK)
833 return retval;
834
835 if (data[0] == 2) { /* short */
836 uint16_t pkt_sz = data[1] + (data[2] << 8);
837
838 /* 4 bytes of command header + 5 bytes per register
839 * write. For bulk read sequences just 4 bytes are
840 * needed per transfer, so this is suboptimal. */
841 pending_queue_len = (pkt_sz - 4) / 5;
842 pending_transfers = malloc(pending_queue_len * sizeof(*pending_transfers));
843 if (!pending_transfers) {
844 LOG_ERROR("Unable to allocate memory for CMSIS-DAP queue");
845 return ERROR_FAIL;
846 }
847
848 if (cmsis_dap_handle->packet_size != pkt_sz + 1) {
849 /* reallocate buffer */
850 cmsis_dap_handle->packet_size = pkt_sz + 1;
851 cmsis_dap_handle->packet_buffer = realloc(cmsis_dap_handle->packet_buffer,
852 cmsis_dap_handle->packet_size);
853 if (cmsis_dap_handle->packet_buffer == NULL) {
854 LOG_ERROR("unable to reallocate memory");
855 return ERROR_FAIL;
856 }
857 }
858
859 LOG_DEBUG("CMSIS-DAP: Packet Size = %" PRId16, pkt_sz);
860 }
861
862 /* INFO_ID_PKT_CNT - byte */
863 retval = cmsis_dap_cmd_DAP_Info(INFO_ID_PKT_CNT, &data);
864 if (retval != ERROR_OK)
865 return retval;
866
867 if (data[0] == 1) { /* byte */
868 uint16_t pkt_cnt = data[1];
869 cmsis_dap_handle->packet_count = pkt_cnt;
870 LOG_DEBUG("CMSIS-DAP: Packet Count = %" PRId16, pkt_cnt);
871 }
872
873 retval = cmsis_dap_get_status();
874 if (retval != ERROR_OK)
875 return ERROR_FAIL;
876
877 /* Now try to connect to the target
878 * TODO: This is all SWD only @ present */
879 retval = cmsis_dap_cmd_DAP_SWJ_Clock(jtag_get_speed_khz());
880 if (retval != ERROR_OK)
881 return ERROR_FAIL;
882
883 /* Ask CMSIS-DAP to automatically retry on receiving WAIT for
884 * up to 64 times. This must be changed to 0 if sticky
885 * overrun detection is enabled. */
886 retval = cmsis_dap_cmd_DAP_TFER_Configure(0, 64, 0);
887 if (retval != ERROR_OK)
888 return ERROR_FAIL;
889 /* Data Phase (bit 2) must be set to 1 if sticky overrun
890 * detection is enabled */
891 retval = cmsis_dap_cmd_DAP_SWD_Configure(0); /* 1 TRN, no Data Phase */
892 if (retval != ERROR_OK)
893 return ERROR_FAIL;
894
895 retval = cmsis_dap_cmd_DAP_LED(0x03); /* Both LEDs on */
896 if (retval != ERROR_OK)
897 return ERROR_FAIL;
898
899 /* support connecting with srst asserted */
900 enum reset_types jtag_reset_config = jtag_get_reset_config();
901
902 if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
903 if (jtag_reset_config & RESET_SRST_NO_GATING) {
904 retval = cmsis_dap_cmd_DAP_SWJ_Pins(0, (1 << 7), 0, NULL);
905 if (retval != ERROR_OK)
906 return ERROR_FAIL;
907 LOG_INFO("Connecting under reset");
908 }
909 }
910
911 cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
912
913 LOG_INFO("CMSIS-DAP: Interface ready");
914
915 return ERROR_OK;
916 }
917
918 static int cmsis_dap_swd_init(void)
919 {
920 swd_mode = true;
921 return ERROR_OK;
922 }
923
924 static int cmsis_dap_quit(void)
925 {
926 cmsis_dap_cmd_DAP_Disconnect();
927 cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
928
929 cmsis_dap_usb_close(cmsis_dap_handle);
930
931 return ERROR_OK;
932 }
933
934 static void cmsis_dap_execute_reset(struct jtag_command *cmd)
935 {
936 int retval = cmsis_dap_cmd_DAP_SWJ_Pins(cmd->cmd.reset->srst ? 0 : (1 << 7), \
937 (1 << 7), 0, NULL);
938 if (retval != ERROR_OK)
939 LOG_ERROR("CMSIS-DAP: Interface reset failed");
940 }
941
942 static void cmsis_dap_execute_sleep(struct jtag_command *cmd)
943 {
944 #if 0
945 int retval = cmsis_dap_cmd_DAP_Delay(cmd->cmd.sleep->us);
946 if (retval != ERROR_OK)
947 #endif
948 jtag_sleep(cmd->cmd.sleep->us);
949 }
950
951 static void cmsis_dap_execute_command(struct jtag_command *cmd)
952 {
953 switch (cmd->type) {
954 case JTAG_RESET:
955 cmsis_dap_execute_reset(cmd);
956 break;
957 case JTAG_SLEEP:
958 cmsis_dap_execute_sleep(cmd);
959 break;
960 default:
961 LOG_ERROR("BUG: unknown JTAG command type encountered");
962 exit(-1);
963 }
964 }
965
966 static int cmsis_dap_execute_queue(void)
967 {
968 struct jtag_command *cmd = jtag_command_queue;
969
970 while (cmd != NULL) {
971 cmsis_dap_execute_command(cmd);
972 cmd = cmd->next;
973 }
974
975 return ERROR_OK;
976 }
977
978 static int cmsis_dap_speed(int speed)
979 {
980 if (speed > DAP_MAX_CLOCK) {
981 LOG_INFO("reduce speed request: %dkHz to %dkHz maximum", speed, DAP_MAX_CLOCK);
982 speed = DAP_MAX_CLOCK;
983 }
984
985 if (speed == 0) {
986 LOG_INFO("RTCK not supported");
987 return ERROR_JTAG_NOT_IMPLEMENTED;
988 }
989
990 return cmsis_dap_cmd_DAP_SWJ_Clock(speed);
991 }
992
993 static int cmsis_dap_speed_div(int speed, int *khz)
994 {
995 *khz = speed;
996 return ERROR_OK;
997 }
998
999 static int cmsis_dap_khz(int khz, int *jtag_speed)
1000 {
1001 *jtag_speed = khz;
1002 return ERROR_OK;
1003 }
1004
1005 static int_least32_t cmsis_dap_swd_frequency(int_least32_t hz)
1006 {
1007 if (hz > 0)
1008 cmsis_dap_speed(hz / 1000);
1009
1010 return hz;
1011 }
1012
1013 COMMAND_HANDLER(cmsis_dap_handle_info_command)
1014 {
1015 if (cmsis_dap_get_version_info() == ERROR_OK)
1016 cmsis_dap_get_status();
1017
1018 return ERROR_OK;
1019 }
1020
1021 COMMAND_HANDLER(cmsis_dap_handle_vid_pid_command)
1022 {
1023 if (CMD_ARGC > MAX_USB_IDS * 2) {
1024 LOG_WARNING("ignoring extra IDs in cmsis_dap_vid_pid "
1025 "(maximum is %d pairs)", MAX_USB_IDS);
1026 CMD_ARGC = MAX_USB_IDS * 2;
1027 }
1028 if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
1029 LOG_WARNING("incomplete cmsis_dap_vid_pid configuration directive");
1030 if (CMD_ARGC < 2)
1031 return ERROR_COMMAND_SYNTAX_ERROR;
1032 /* remove the incomplete trailing id */
1033 CMD_ARGC -= 1;
1034 }
1035
1036 unsigned i;
1037 for (i = 0; i < CMD_ARGC; i += 2) {
1038 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], cmsis_dap_vid[i >> 1]);
1039 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], cmsis_dap_pid[i >> 1]);
1040 }
1041
1042 /*
1043 * Explicitly terminate, in case there are multiples instances of
1044 * cmsis_dap_vid_pid.
1045 */
1046 cmsis_dap_vid[i >> 1] = cmsis_dap_pid[i >> 1] = 0;
1047
1048 return ERROR_OK;
1049 }
1050
1051 COMMAND_HANDLER(cmsis_dap_handle_serial_command)
1052 {
1053 if (CMD_ARGC == 1) {
1054 size_t len = mbstowcs(NULL, CMD_ARGV[0], 0);
1055 cmsis_dap_serial = calloc(len + 1, sizeof(wchar_t));
1056 if (cmsis_dap_serial == NULL) {
1057 LOG_ERROR("unable to allocate memory");
1058 return ERROR_OK;
1059 }
1060 if (mbstowcs(cmsis_dap_serial, CMD_ARGV[0], len + 1) == (size_t)-1) {
1061 free(cmsis_dap_serial);
1062 cmsis_dap_serial = NULL;
1063 LOG_ERROR("unable to convert serial");
1064 }
1065 } else {
1066 LOG_ERROR("expected exactly one argument to cmsis_dap_serial <serial-number>");
1067 }
1068
1069 return ERROR_OK;
1070 }
1071
1072 static const struct command_registration cmsis_dap_subcommand_handlers[] = {
1073 {
1074 .name = "info",
1075 .handler = &cmsis_dap_handle_info_command,
1076 .mode = COMMAND_EXEC,
1077 .usage = "",
1078 .help = "show cmsis-dap info",
1079 },
1080 COMMAND_REGISTRATION_DONE
1081 };
1082
1083 static const struct command_registration cmsis_dap_command_handlers[] = {
1084 {
1085 .name = "cmsis-dap",
1086 .mode = COMMAND_ANY,
1087 .help = "perform CMSIS-DAP management",
1088 .usage = "<cmd>",
1089 .chain = cmsis_dap_subcommand_handlers,
1090 },
1091 {
1092 .name = "cmsis_dap_vid_pid",
1093 .handler = &cmsis_dap_handle_vid_pid_command,
1094 .mode = COMMAND_CONFIG,
1095 .help = "the vendor ID and product ID of the CMSIS-DAP device",
1096 .usage = "(vid pid)* ",
1097 },
1098 {
1099 .name = "cmsis_dap_serial",
1100 .handler = &cmsis_dap_handle_serial_command,
1101 .mode = COMMAND_CONFIG,
1102 .help = "set the serial number of the adapter",
1103 .usage = "serial_string",
1104 },
1105 COMMAND_REGISTRATION_DONE
1106 };
1107
1108 static const struct swd_driver cmsis_dap_swd_driver = {
1109 .init = cmsis_dap_swd_init,
1110 .frequency = cmsis_dap_swd_frequency,
1111 .switch_seq = cmsis_dap_swd_switch_seq,
1112 .read_reg = cmsis_dap_swd_read_reg,
1113 .write_reg = cmsis_dap_swd_write_reg,
1114 .run = cmsis_dap_swd_run_queue,
1115 };
1116
1117 static const char * const cmsis_dap_transport[] = { "swd", NULL };
1118
1119 struct jtag_interface cmsis_dap_interface = {
1120 .name = "cmsis-dap",
1121 .commands = cmsis_dap_command_handlers,
1122 .swd = &cmsis_dap_swd_driver,
1123 .transports = cmsis_dap_transport,
1124
1125 .execute_queue = cmsis_dap_execute_queue,
1126 .speed = cmsis_dap_speed,
1127 .speed_div = cmsis_dap_speed_div,
1128 .khz = cmsis_dap_khz,
1129 .init = cmsis_dap_init,
1130 .quit = cmsis_dap_quit,
1131 };
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