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jtag/ftdi: switch to command 'adapter serial'
[openocd.git] / src / jtag / drivers / ftdi.c
blob7671cee5d08fdbad14a3e615f60018fb37f3c73f
1 /**************************************************************************
2 * Copyright (C) 2012 by Andreas Fritiofson *
3 * andreas.fritiofson@gmail.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
18
19 /**
20 * @file
21 * JTAG adapters based on the FT2232 full and high speed USB parts are
22 * popular low cost JTAG debug solutions. Many FT2232 based JTAG adapters
23 * are discrete, but development boards may integrate them as alternatives
24 * to more capable (and expensive) third party JTAG pods.
25 *
26 * JTAG uses only one of the two communications channels ("MPSSE engines")
27 * on these devices. Adapters based on FT4232 parts have four ports/channels
28 * (A/B/C/D), instead of just two (A/B).
29 *
30 * Especially on development boards integrating one of these chips (as
31 * opposed to discrete pods/dongles), the additional channels can be used
32 * for a variety of purposes, but OpenOCD only uses one channel at a time.
33 *
34 * - As a USB-to-serial adapter for the target's console UART ...
35 * which may be able to support ROM boot loaders that load initial
36 * firmware images to flash (or SRAM).
37 *
38 * - On systems which support ARM's SWD in addition to JTAG, or instead
39 * of it, that second port can be used for reading SWV/SWO trace data.
40 *
41 * - Additional JTAG links, e.g. to a CPLD or * FPGA.
42 *
43 * FT2232 based JTAG adapters are "dumb" not "smart", because most JTAG
44 * request/response interactions involve round trips over the USB link.
45 * A "smart" JTAG adapter has intelligence close to the scan chain, so it
46 * can for example poll quickly for a status change (usually taking on the
47 * order of microseconds not milliseconds) before beginning a queued
48 * transaction which require the previous one to have completed.
49 *
50 * There are dozens of adapters of this type, differing in details which
51 * this driver needs to understand. Those "layout" details are required
52 * as part of FT2232 driver configuration.
53 *
54 * This code uses information contained in the MPSSE specification which was
55 * found here:
56 * https://www.ftdichip.com/Support/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
57 * Hereafter this is called the "MPSSE Spec".
58 *
59 * The datasheet for the ftdichip.com's FT2232H part is here:
60 * https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232H.pdf
61 *
62 * Also note the issue with code 0x4b (clock data to TMS) noted in
63 * http://developer.intra2net.com/mailarchive/html/libftdi/2009/msg00292.html
64 * which can affect longer JTAG state paths.
65 */
66
67 #ifdef HAVE_CONFIG_H
68 #include "config.h"
69 #endif
70
71 /* project specific includes */
72 #include <jtag/adapter.h>
73 #include <jtag/interface.h>
74 #include <jtag/swd.h>
75 #include <transport/transport.h>
76 #include <helper/time_support.h>
77 #include <helper/log.h>
78
79 #if IS_CYGWIN == 1
80 #include <windows.h>
81 #endif
82
83 #include <assert.h>
84
85 /* FTDI access library includes */
86 #include "mpsse.h"
87
88 #define JTAG_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
89 #define JTAG_MODE_ALT (LSB_FIRST | NEG_EDGE_IN | NEG_EDGE_OUT)
90 #define SWD_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
91
92 static char *ftdi_device_desc;
93 static uint8_t ftdi_channel;
94 static uint8_t ftdi_jtag_mode = JTAG_MODE;
95
96 static bool swd_mode;
97
98 #define MAX_USB_IDS 8
99 /* vid = pid = 0 marks the end of the list */
100 static uint16_t ftdi_vid[MAX_USB_IDS + 1] = { 0 };
101 static uint16_t ftdi_pid[MAX_USB_IDS + 1] = { 0 };
102
103 static struct mpsse_ctx *mpsse_ctx;
104
105 struct signal {
106 const char *name;
107 uint16_t data_mask;
108 uint16_t input_mask;
109 uint16_t oe_mask;
110 bool invert_data;
111 bool invert_input;
112 bool invert_oe;
113 struct signal *next;
114 };
115
116 static struct signal *signals;
117
118 /* FIXME: Where to store per-instance data? We need an SWD context. */
119 static struct swd_cmd_queue_entry {
120 uint8_t cmd;
121 uint32_t *dst;
122 uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)];
123 } *swd_cmd_queue;
124 static size_t swd_cmd_queue_length;
125 static size_t swd_cmd_queue_alloced;
126 static int queued_retval;
127 static int freq;
128
129 static uint16_t output;
130 static uint16_t direction;
131 static uint16_t jtag_output_init;
132 static uint16_t jtag_direction_init;
133
134 static int ftdi_swd_switch_seq(enum swd_special_seq seq);
135
136 static struct signal *find_signal_by_name(const char *name)
137 {
138 for (struct signal *sig = signals; sig; sig = sig->next) {
139 if (strcmp(name, sig->name) == 0)
140 return sig;
141 }
142 return NULL;
143 }
144
145 static struct signal *create_signal(const char *name)
146 {
147 struct signal **psig = &signals;
148 while (*psig)
149 psig = &(*psig)->next;
150
151 *psig = calloc(1, sizeof(**psig));
152 if (!*psig)
153 return NULL;
154
155 (*psig)->name = strdup(name);
156 if (!(*psig)->name) {
157 free(*psig);
158 *psig = NULL;
159 }
160 return *psig;
161 }
162
163 static int ftdi_set_signal(const struct signal *s, char value)
164 {
165 bool data;
166 bool oe;
167
168 if (s->data_mask == 0 && s->oe_mask == 0) {
169 LOG_ERROR("interface doesn't provide signal '%s'", s->name);
170 return ERROR_FAIL;
171 }
172 switch (value) {
173 case '0':
174 data = s->invert_data;
175 oe = !s->invert_oe;
176 break;
177 case '1':
178 if (s->data_mask == 0) {
179 LOG_ERROR("interface can't drive '%s' high", s->name);
180 return ERROR_FAIL;
181 }
182 data = !s->invert_data;
183 oe = !s->invert_oe;
184 break;
185 case 'z':
186 case 'Z':
187 if (s->oe_mask == 0) {
188 LOG_ERROR("interface can't tri-state '%s'", s->name);
189 return ERROR_FAIL;
190 }
191 data = s->invert_data;
192 oe = s->invert_oe;
193 break;
194 default:
195 assert(0 && "invalid signal level specifier");
196 return ERROR_FAIL;
197 }
198
199 uint16_t old_output = output;
200 uint16_t old_direction = direction;
201
202 output = data ? output | s->data_mask : output & ~s->data_mask;
203 if (s->oe_mask == s->data_mask)
204 direction = oe ? direction | s->oe_mask : direction & ~s->oe_mask;
205 else
206 output = oe ? output | s->oe_mask : output & ~s->oe_mask;
207
208 if ((output & 0xff) != (old_output & 0xff) || (direction & 0xff) != (old_direction & 0xff))
209 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
210 if ((output >> 8 != old_output >> 8) || (direction >> 8 != old_direction >> 8))
211 mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
212
213 return ERROR_OK;
214 }
215
216 static int ftdi_get_signal(const struct signal *s, uint16_t *value_out)
217 {
218 uint8_t data_low = 0;
219 uint8_t data_high = 0;
220
221 if (s->input_mask == 0) {
222 LOG_ERROR("interface doesn't provide signal '%s'", s->name);
223 return ERROR_FAIL;
224 }
225
226 if (s->input_mask & 0xff)
227 mpsse_read_data_bits_low_byte(mpsse_ctx, &data_low);
228 if (s->input_mask >> 8)
229 mpsse_read_data_bits_high_byte(mpsse_ctx, &data_high);
230
231 mpsse_flush(mpsse_ctx);
232
233 *value_out = (((uint16_t)data_high) << 8) | data_low;
234
235 if (s->invert_input)
236 *value_out = ~(*value_out);
237
238 *value_out &= s->input_mask;
239
240 return ERROR_OK;
241 }
242
243 /**
244 * Function move_to_state
245 * moves the TAP controller from the current state to a
246 * \a goal_state through a path given by tap_get_tms_path(). State transition
247 * logging is performed by delegation to clock_tms().
248 *
249 * @param goal_state is the destination state for the move.
250 */
251 static void move_to_state(tap_state_t goal_state)
252 {
253 tap_state_t start_state = tap_get_state();
254
255 /* goal_state is 1/2 of a tuple/pair of states which allow convenient
256 lookup of the required TMS pattern to move to this state from the
257 start state.
258 */
259
260 /* do the 2 lookups */
261 uint8_t tms_bits = tap_get_tms_path(start_state, goal_state);
262 int tms_count = tap_get_tms_path_len(start_state, goal_state);
263 assert(tms_count <= 8);
264
265 LOG_DEBUG_IO("start=%s goal=%s", tap_state_name(start_state), tap_state_name(goal_state));
266
267 /* Track state transitions step by step */
268 for (int i = 0; i < tms_count; i++)
269 tap_set_state(tap_state_transition(tap_get_state(), (tms_bits >> i) & 1));
270
271 mpsse_clock_tms_cs_out(mpsse_ctx,
272 &tms_bits,
273 0,
274 tms_count,
275 false,
276 ftdi_jtag_mode);
277 }
278
279 static int ftdi_speed(int speed)
280 {
281 int retval;
282 retval = mpsse_set_frequency(mpsse_ctx, speed);
283
284 if (retval < 0) {
285 LOG_ERROR("couldn't set FTDI TCK speed");
286 return retval;
287 }
288
289 if (!swd_mode && speed >= 10000000 && ftdi_jtag_mode != JTAG_MODE_ALT)
290 LOG_INFO("ftdi: if you experience problems at higher adapter clocks, try "
291 "the command \"ftdi tdo_sample_edge falling\"");
292 return ERROR_OK;
293 }
294
295 static int ftdi_speed_div(int speed, int *khz)
296 {
297 *khz = speed / 1000;
298 return ERROR_OK;
299 }
300
301 static int ftdi_khz(int khz, int *jtag_speed)
302 {
303 if (khz == 0 && !mpsse_is_high_speed(mpsse_ctx)) {
304 LOG_DEBUG("RCLK not supported");
305 return ERROR_FAIL;
306 }
307
308 *jtag_speed = khz * 1000;
309 return ERROR_OK;
310 }
311
312 static void ftdi_end_state(tap_state_t state)
313 {
314 if (tap_is_state_stable(state))
315 tap_set_end_state(state);
316 else {
317 LOG_ERROR("BUG: %s is not a stable end state", tap_state_name(state));
318 exit(-1);
319 }
320 }
321
322 static void ftdi_execute_runtest(struct jtag_command *cmd)
323 {
324 int i;
325 uint8_t zero = 0;
326
327 LOG_DEBUG_IO("runtest %i cycles, end in %s",
328 cmd->cmd.runtest->num_cycles,
329 tap_state_name(cmd->cmd.runtest->end_state));
330
331 if (tap_get_state() != TAP_IDLE)
332 move_to_state(TAP_IDLE);
333
334 /* TODO: Reuse ftdi_execute_stableclocks */
335 i = cmd->cmd.runtest->num_cycles;
336 while (i > 0) {
337 /* there are no state transitions in this code, so omit state tracking */
338 unsigned this_len = i > 7 ? 7 : i;
339 mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, ftdi_jtag_mode);
340 i -= this_len;
341 }
342
343 ftdi_end_state(cmd->cmd.runtest->end_state);
344
345 if (tap_get_state() != tap_get_end_state())
346 move_to_state(tap_get_end_state());
347
348 LOG_DEBUG_IO("runtest: %i, end in %s",
349 cmd->cmd.runtest->num_cycles,
350 tap_state_name(tap_get_end_state()));
351 }
352
353 static void ftdi_execute_statemove(struct jtag_command *cmd)
354 {
355 LOG_DEBUG_IO("statemove end in %s",
356 tap_state_name(cmd->cmd.statemove->end_state));
357
358 ftdi_end_state(cmd->cmd.statemove->end_state);
359
360 /* shortest-path move to desired end state */
361 if (tap_get_state() != tap_get_end_state() || tap_get_end_state() == TAP_RESET)
362 move_to_state(tap_get_end_state());
363 }
364
365 /**
366 * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
367 * (or SWD) state machine. REVISIT: Not the best method, perhaps.
368 */
369 static void ftdi_execute_tms(struct jtag_command *cmd)
370 {
371 LOG_DEBUG_IO("TMS: %d bits", cmd->cmd.tms->num_bits);
372
373 /* TODO: Missing tap state tracking, also missing from ft2232.c! */
374 mpsse_clock_tms_cs_out(mpsse_ctx,
375 cmd->cmd.tms->bits,
376 0,
377 cmd->cmd.tms->num_bits,
378 false,
379 ftdi_jtag_mode);
380 }
381
382 static void ftdi_execute_pathmove(struct jtag_command *cmd)
383 {
384 tap_state_t *path = cmd->cmd.pathmove->path;
385 int num_states = cmd->cmd.pathmove->num_states;
386
387 LOG_DEBUG_IO("pathmove: %i states, current: %s end: %s", num_states,
388 tap_state_name(tap_get_state()),
389 tap_state_name(path[num_states-1]));
390
391 int state_count = 0;
392 unsigned bit_count = 0;
393 uint8_t tms_byte = 0;
394
395 LOG_DEBUG_IO("-");
396
397 /* this loop verifies that the path is legal and logs each state in the path */
398 while (num_states--) {
399
400 /* either TMS=0 or TMS=1 must work ... */
401 if (tap_state_transition(tap_get_state(), false)
402 == path[state_count])
403 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
404 else if (tap_state_transition(tap_get_state(), true)
405 == path[state_count]) {
406 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
407
408 /* ... or else the caller goofed BADLY */
409 } else {
410 LOG_ERROR("BUG: %s -> %s isn't a valid "
411 "TAP state transition",
412 tap_state_name(tap_get_state()),
413 tap_state_name(path[state_count]));
414 exit(-1);
415 }
416
417 tap_set_state(path[state_count]);
418 state_count++;
419
420 if (bit_count == 7 || num_states == 0) {
421 mpsse_clock_tms_cs_out(mpsse_ctx,
422 &tms_byte,
423 0,
424 bit_count,
425 false,
426 ftdi_jtag_mode);
427 bit_count = 0;
428 }
429 }
430 tap_set_end_state(tap_get_state());
431 }
432
433 static void ftdi_execute_scan(struct jtag_command *cmd)
434 {
435 LOG_DEBUG_IO("%s type:%d", cmd->cmd.scan->ir_scan ? "IRSCAN" : "DRSCAN",
436 jtag_scan_type(cmd->cmd.scan));
437
438 /* Make sure there are no trailing fields with num_bits == 0, or the logic below will fail. */
439 while (cmd->cmd.scan->num_fields > 0
440 && cmd->cmd.scan->fields[cmd->cmd.scan->num_fields - 1].num_bits == 0) {
441 cmd->cmd.scan->num_fields--;
442 LOG_DEBUG_IO("discarding trailing empty field");
443 }
444
445 if (cmd->cmd.scan->num_fields == 0) {
446 LOG_DEBUG_IO("empty scan, doing nothing");
447 return;
448 }
449
450 if (cmd->cmd.scan->ir_scan) {
451 if (tap_get_state() != TAP_IRSHIFT)
452 move_to_state(TAP_IRSHIFT);
453 } else {
454 if (tap_get_state() != TAP_DRSHIFT)
455 move_to_state(TAP_DRSHIFT);
456 }
457
458 ftdi_end_state(cmd->cmd.scan->end_state);
459
460 struct scan_field *field = cmd->cmd.scan->fields;
461 unsigned scan_size = 0;
462
463 for (int i = 0; i < cmd->cmd.scan->num_fields; i++, field++) {
464 scan_size += field->num_bits;
465 LOG_DEBUG_IO("%s%s field %d/%d %d bits",
466 field->in_value ? "in" : "",
467 field->out_value ? "out" : "",
468 i,
469 cmd->cmd.scan->num_fields,
470 field->num_bits);
471
472 if (i == cmd->cmd.scan->num_fields - 1 && tap_get_state() != tap_get_end_state()) {
473 /* Last field, and we're leaving IRSHIFT/DRSHIFT. Clock last bit during tap
474 * movement. This last field can't have length zero, it was checked above. */
475 mpsse_clock_data(mpsse_ctx,
476 field->out_value,
477 0,
478 field->in_value,
479 0,
480 field->num_bits - 1,
481 ftdi_jtag_mode);
482 uint8_t last_bit = 0;
483 if (field->out_value)
484 bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1);
485
486 /* If endstate is TAP_IDLE, clock out 1-1-0 (->EXIT1 ->UPDATE ->IDLE)
487 * Otherwise, clock out 1-0 (->EXIT1 ->PAUSE)
488 */
489 uint8_t tms_bits = 0x03;
490 mpsse_clock_tms_cs(mpsse_ctx,
491 &tms_bits,
492 0,
493 field->in_value,
494 field->num_bits - 1,
495 1,
496 last_bit,
497 ftdi_jtag_mode);
498 tap_set_state(tap_state_transition(tap_get_state(), 1));
499 if (tap_get_end_state() == TAP_IDLE) {
500 mpsse_clock_tms_cs_out(mpsse_ctx,
501 &tms_bits,
502 1,
503 2,
504 last_bit,
505 ftdi_jtag_mode);
506 tap_set_state(tap_state_transition(tap_get_state(), 1));
507 tap_set_state(tap_state_transition(tap_get_state(), 0));
508 } else {
509 mpsse_clock_tms_cs_out(mpsse_ctx,
510 &tms_bits,
511 2,
512 1,
513 last_bit,
514 ftdi_jtag_mode);
515 tap_set_state(tap_state_transition(tap_get_state(), 0));
516 }
517 } else
518 mpsse_clock_data(mpsse_ctx,
519 field->out_value,
520 0,
521 field->in_value,
522 0,
523 field->num_bits,
524 ftdi_jtag_mode);
525 }
526
527 if (tap_get_state() != tap_get_end_state())
528 move_to_state(tap_get_end_state());
529
530 LOG_DEBUG_IO("%s scan, %i bits, end in %s",
531 (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
532 tap_state_name(tap_get_end_state()));
533 }
534
535 static int ftdi_reset(int trst, int srst)
536 {
537 struct signal *sig_ntrst = find_signal_by_name("nTRST");
538 struct signal *sig_nsrst = find_signal_by_name("nSRST");
539
540 LOG_DEBUG_IO("reset trst: %i srst %i", trst, srst);
541
542 if (!swd_mode) {
543 if (trst == 1) {
544 if (sig_ntrst)
545 ftdi_set_signal(sig_ntrst, '0');
546 else
547 LOG_ERROR("Can't assert TRST: nTRST signal is not defined");
548 } else if (sig_ntrst && jtag_get_reset_config() & RESET_HAS_TRST &&
549 trst == 0) {
550 if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
551 ftdi_set_signal(sig_ntrst, 'z');
552 else
553 ftdi_set_signal(sig_ntrst, '1');
554 }
555 }
556
557 if (srst == 1) {
558 if (sig_nsrst)
559 ftdi_set_signal(sig_nsrst, '0');
560 else
561 LOG_ERROR("Can't assert SRST: nSRST signal is not defined");
562 } else if (sig_nsrst && jtag_get_reset_config() & RESET_HAS_SRST &&
563 srst == 0) {
564 if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
565 ftdi_set_signal(sig_nsrst, '1');
566 else
567 ftdi_set_signal(sig_nsrst, 'z');
568 }
569
570 return mpsse_flush(mpsse_ctx);
571 }
572
573 static void ftdi_execute_sleep(struct jtag_command *cmd)
574 {
575 LOG_DEBUG_IO("sleep %" PRIu32, cmd->cmd.sleep->us);
576
577 mpsse_flush(mpsse_ctx);
578 jtag_sleep(cmd->cmd.sleep->us);
579 LOG_DEBUG_IO("sleep %" PRIu32 " usec while in %s",
580 cmd->cmd.sleep->us,
581 tap_state_name(tap_get_state()));
582 }
583
584 static void ftdi_execute_stableclocks(struct jtag_command *cmd)
585 {
586 /* this is only allowed while in a stable state. A check for a stable
587 * state was done in jtag_add_clocks()
588 */
589 int num_cycles = cmd->cmd.stableclocks->num_cycles;
590
591 /* 7 bits of either ones or zeros. */
592 uint8_t tms = tap_get_state() == TAP_RESET ? 0x7f : 0x00;
593
594 /* TODO: Use mpsse_clock_data with in=out=0 for this, if TMS can be set to
595 * the correct level and remain there during the scan */
596 while (num_cycles > 0) {
597 /* there are no state transitions in this code, so omit state tracking */
598 unsigned this_len = num_cycles > 7 ? 7 : num_cycles;
599 mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, ftdi_jtag_mode);
600 num_cycles -= this_len;
601 }
602
603 LOG_DEBUG_IO("clocks %i while in %s",
604 cmd->cmd.stableclocks->num_cycles,
605 tap_state_name(tap_get_state()));
606 }
607
608 static void ftdi_execute_command(struct jtag_command *cmd)
609 {
610 switch (cmd->type) {
611 case JTAG_RUNTEST:
612 ftdi_execute_runtest(cmd);
613 break;
614 case JTAG_TLR_RESET:
615 ftdi_execute_statemove(cmd);
616 break;
617 case JTAG_PATHMOVE:
618 ftdi_execute_pathmove(cmd);
619 break;
620 case JTAG_SCAN:
621 ftdi_execute_scan(cmd);
622 break;
623 case JTAG_SLEEP:
624 ftdi_execute_sleep(cmd);
625 break;
626 case JTAG_STABLECLOCKS:
627 ftdi_execute_stableclocks(cmd);
628 break;
629 case JTAG_TMS:
630 ftdi_execute_tms(cmd);
631 break;
632 default:
633 LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
634 break;
635 }
636 }
637
638 static int ftdi_execute_queue(void)
639 {
640 /* blink, if the current layout has that feature */
641 struct signal *led = find_signal_by_name("LED");
642 if (led)
643 ftdi_set_signal(led, '1');
644
645 for (struct jtag_command *cmd = jtag_command_queue; cmd; cmd = cmd->next) {
646 /* fill the write buffer with the desired command */
647 ftdi_execute_command(cmd);
648 }
649
650 if (led)
651 ftdi_set_signal(led, '0');
652
653 int retval = mpsse_flush(mpsse_ctx);
654 if (retval != ERROR_OK)
655 LOG_ERROR("error while flushing MPSSE queue: %d", retval);
656
657 return retval;
658 }
659
660 static int ftdi_initialize(void)
661 {
662 if (tap_get_tms_path_len(TAP_IRPAUSE, TAP_IRPAUSE) == 7)
663 LOG_DEBUG("ftdi interface using 7 step jtag state transitions");
664 else
665 LOG_DEBUG("ftdi interface using shortest path jtag state transitions");
666
667 if (!ftdi_vid[0] && !ftdi_pid[0]) {
668 LOG_ERROR("Please specify ftdi vid_pid");
669 return ERROR_JTAG_INIT_FAILED;
670 }
671
672 for (int i = 0; ftdi_vid[i] || ftdi_pid[i]; i++) {
673 mpsse_ctx = mpsse_open(&ftdi_vid[i], &ftdi_pid[i], ftdi_device_desc,
674 adapter_get_required_serial(), adapter_usb_get_location(), ftdi_channel);
675 if (mpsse_ctx)
676 break;
677 }
678
679 if (!mpsse_ctx)
680 return ERROR_JTAG_INIT_FAILED;
681
682 output = jtag_output_init;
683 direction = jtag_direction_init;
684
685 if (swd_mode) {
686 struct signal *sig = find_signal_by_name("SWD_EN");
687 if (!sig) {
688 LOG_ERROR("SWD mode is active but SWD_EN signal is not defined");
689 return ERROR_JTAG_INIT_FAILED;
690 }
691 /* A dummy SWD_EN would have zero mask */
692 if (sig->data_mask)
693 ftdi_set_signal(sig, '1');
694 }
695
696 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
697 mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
698
699 mpsse_loopback_config(mpsse_ctx, false);
700
701 freq = mpsse_set_frequency(mpsse_ctx, adapter_get_speed_khz() * 1000);
702
703 return mpsse_flush(mpsse_ctx);
704 }
705
706 static int ftdi_quit(void)
707 {
708 mpsse_close(mpsse_ctx);
709
710 struct signal *sig = signals;
711 while (sig) {
712 struct signal *next = sig->next;
713 free((void *)sig->name);
714 free(sig);
715 sig = next;
716 }
717
718 free(ftdi_device_desc);
719
720 free(swd_cmd_queue);
721
722 return ERROR_OK;
723 }
724
725 COMMAND_HANDLER(ftdi_handle_device_desc_command)
726 {
727 if (CMD_ARGC == 1) {
728 free(ftdi_device_desc);
729 ftdi_device_desc = strdup(CMD_ARGV[0]);
730 } else {
731 LOG_ERROR("expected exactly one argument to ftdi device_desc <description>");
732 }
733
734 return ERROR_OK;
735 }
736
737 COMMAND_HANDLER(ftdi_handle_channel_command)
738 {
739 if (CMD_ARGC == 1)
740 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], ftdi_channel);
741 else
742 return ERROR_COMMAND_SYNTAX_ERROR;
743
744 return ERROR_OK;
745 }
746
747 COMMAND_HANDLER(ftdi_handle_layout_init_command)
748 {
749 if (CMD_ARGC != 2)
750 return ERROR_COMMAND_SYNTAX_ERROR;
751
752 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], jtag_output_init);
753 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], jtag_direction_init);
754
755 return ERROR_OK;
756 }
757
758 COMMAND_HANDLER(ftdi_handle_layout_signal_command)
759 {
760 if (CMD_ARGC < 1)
761 return ERROR_COMMAND_SYNTAX_ERROR;
762
763 bool invert_data = false;
764 uint16_t data_mask = 0;
765 bool invert_input = false;
766 uint16_t input_mask = 0;
767 bool invert_oe = false;
768 uint16_t oe_mask = 0;
769 for (unsigned i = 1; i < CMD_ARGC; i += 2) {
770 if (strcmp("-data", CMD_ARGV[i]) == 0) {
771 invert_data = false;
772 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
773 } else if (strcmp("-ndata", CMD_ARGV[i]) == 0) {
774 invert_data = true;
775 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
776 } else if (strcmp("-input", CMD_ARGV[i]) == 0) {
777 invert_input = false;
778 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], input_mask);
779 } else if (strcmp("-ninput", CMD_ARGV[i]) == 0) {
780 invert_input = true;
781 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], input_mask);
782 } else if (strcmp("-oe", CMD_ARGV[i]) == 0) {
783 invert_oe = false;
784 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
785 } else if (strcmp("-noe", CMD_ARGV[i]) == 0) {
786 invert_oe = true;
787 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
788 } else if (!strcmp("-alias", CMD_ARGV[i]) ||
789 !strcmp("-nalias", CMD_ARGV[i])) {
790 if (!strcmp("-nalias", CMD_ARGV[i])) {
791 invert_data = true;
792 invert_input = true;
793 }
794 struct signal *sig = find_signal_by_name(CMD_ARGV[i + 1]);
795 if (!sig) {
796 LOG_ERROR("signal %s is not defined", CMD_ARGV[i + 1]);
797 return ERROR_FAIL;
798 }
799 data_mask = sig->data_mask;
800 input_mask = sig->input_mask;
801 oe_mask = sig->oe_mask;
802 invert_input ^= sig->invert_input;
803 invert_oe = sig->invert_oe;
804 invert_data ^= sig->invert_data;
805 } else {
806 LOG_ERROR("unknown option '%s'", CMD_ARGV[i]);
807 return ERROR_COMMAND_SYNTAX_ERROR;
808 }
809 }
810
811 struct signal *sig;
812 sig = find_signal_by_name(CMD_ARGV[0]);
813 if (!sig)
814 sig = create_signal(CMD_ARGV[0]);
815 if (!sig) {
816 LOG_ERROR("failed to create signal %s", CMD_ARGV[0]);
817 return ERROR_FAIL;
818 }
819
820 sig->invert_data = invert_data;
821 sig->data_mask = data_mask;
822 sig->invert_input = invert_input;
823 sig->input_mask = input_mask;
824 sig->invert_oe = invert_oe;
825 sig->oe_mask = oe_mask;
826
827 return ERROR_OK;
828 }
829
830 COMMAND_HANDLER(ftdi_handle_set_signal_command)
831 {
832 if (CMD_ARGC < 2)
833 return ERROR_COMMAND_SYNTAX_ERROR;
834
835 struct signal *sig;
836 sig = find_signal_by_name(CMD_ARGV[0]);
837 if (!sig) {
838 LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
839 return ERROR_FAIL;
840 }
841
842 switch (*CMD_ARGV[1]) {
843 case '0':
844 case '1':
845 case 'z':
846 case 'Z':
847 /* single character level specifier only */
848 if (CMD_ARGV[1][1] == '\0') {
849 ftdi_set_signal(sig, *CMD_ARGV[1]);
850 break;
851 }
852 /* fallthrough */
853 default:
854 LOG_ERROR("unknown signal level '%s', use 0, 1 or z", CMD_ARGV[1]);
855 return ERROR_COMMAND_SYNTAX_ERROR;
856 }
857
858 return mpsse_flush(mpsse_ctx);
859 }
860
861 COMMAND_HANDLER(ftdi_handle_get_signal_command)
862 {
863 if (CMD_ARGC < 1)
864 return ERROR_COMMAND_SYNTAX_ERROR;
865
866 struct signal *sig;
867 uint16_t sig_data = 0;
868 sig = find_signal_by_name(CMD_ARGV[0]);
869 if (!sig) {
870 LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
871 return ERROR_FAIL;
872 }
873
874 int ret = ftdi_get_signal(sig, &sig_data);
875 if (ret != ERROR_OK)
876 return ret;
877
878 LOG_USER("Signal %s = %#06x", sig->name, sig_data);
879
880 return ERROR_OK;
881 }
882
883 COMMAND_HANDLER(ftdi_handle_vid_pid_command)
884 {
885 if (CMD_ARGC > MAX_USB_IDS * 2) {
886 LOG_WARNING("ignoring extra IDs in ftdi vid_pid "
887 "(maximum is %d pairs)", MAX_USB_IDS);
888 CMD_ARGC = MAX_USB_IDS * 2;
889 }
890 if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
891 LOG_WARNING("incomplete ftdi vid_pid configuration directive");
892 if (CMD_ARGC < 2)
893 return ERROR_COMMAND_SYNTAX_ERROR;
894 /* remove the incomplete trailing id */
895 CMD_ARGC -= 1;
896 }
897
898 unsigned i;
899 for (i = 0; i < CMD_ARGC; i += 2) {
900 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], ftdi_vid[i >> 1]);
901 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], ftdi_pid[i >> 1]);
902 }
903
904 /*
905 * Explicitly terminate, in case there are multiples instances of
906 * ftdi vid_pid.
907 */
908 ftdi_vid[i >> 1] = ftdi_pid[i >> 1] = 0;
909
910 return ERROR_OK;
911 }
912
913 COMMAND_HANDLER(ftdi_handle_tdo_sample_edge_command)
914 {
915 struct jim_nvp *n;
916 static const struct jim_nvp nvp_ftdi_jtag_modes[] = {
917 { .name = "rising", .value = JTAG_MODE },
918 { .name = "falling", .value = JTAG_MODE_ALT },
919 { .name = NULL, .value = -1 },
920 };
921
922 if (CMD_ARGC > 0) {
923 n = jim_nvp_name2value_simple(nvp_ftdi_jtag_modes, CMD_ARGV[0]);
924 if (!n->name)
925 return ERROR_COMMAND_SYNTAX_ERROR;
926 ftdi_jtag_mode = n->value;
927
928 }
929
930 n = jim_nvp_value2name_simple(nvp_ftdi_jtag_modes, ftdi_jtag_mode);
931 command_print(CMD, "ftdi samples TDO on %s edge of TCK", n->name);
932
933 return ERROR_OK;
934 }
935
936 static const struct command_registration ftdi_subcommand_handlers[] = {
937 {
938 .name = "device_desc",
939 .handler = &ftdi_handle_device_desc_command,
940 .mode = COMMAND_CONFIG,
941 .help = "set the USB device description of the FTDI device",
942 .usage = "description_string",
943 },
944 {
945 .name = "channel",
946 .handler = &ftdi_handle_channel_command,
947 .mode = COMMAND_CONFIG,
948 .help = "set the channel of the FTDI device that is used as JTAG",
949 .usage = "(0-3)",
950 },
951 {
952 .name = "layout_init",
953 .handler = &ftdi_handle_layout_init_command,
954 .mode = COMMAND_CONFIG,
955 .help = "initialize the FTDI GPIO signals used "
956 "to control output-enables and reset signals",
957 .usage = "data direction",
958 },
959 {
960 .name = "layout_signal",
961 .handler = &ftdi_handle_layout_signal_command,
962 .mode = COMMAND_ANY,
963 .help = "define a signal controlled by one or more FTDI GPIO as data "
964 "and/or output enable",
965 .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask] [-alias|-nalias name]",
966 },
967 {
968 .name = "set_signal",
969 .handler = &ftdi_handle_set_signal_command,
970 .mode = COMMAND_EXEC,
971 .help = "control a layout-specific signal",
972 .usage = "name (1|0|z)",
973 },
974 {
975 .name = "get_signal",
976 .handler = &ftdi_handle_get_signal_command,
977 .mode = COMMAND_EXEC,
978 .help = "read the value of a layout-specific signal",
979 .usage = "name",
980 },
981 {
982 .name = "vid_pid",
983 .handler = &ftdi_handle_vid_pid_command,
984 .mode = COMMAND_CONFIG,
985 .help = "the vendor ID and product ID of the FTDI device",
986 .usage = "(vid pid)*",
987 },
988 {
989 .name = "tdo_sample_edge",
990 .handler = &ftdi_handle_tdo_sample_edge_command,
991 .mode = COMMAND_ANY,
992 .help = "set which TCK clock edge is used for sampling TDO "
993 "- default is rising-edge (Setting to falling-edge may "
994 "allow signalling speed increase)",
995 .usage = "(rising|falling)",
996 },
997 COMMAND_REGISTRATION_DONE
998 };
999
1000 static const struct command_registration ftdi_command_handlers[] = {
1001 {
1002 .name = "ftdi",
1003 .mode = COMMAND_ANY,
1004 .help = "perform ftdi management",
1005 .chain = ftdi_subcommand_handlers,
1006 .usage = "",
1007 },
1008 COMMAND_REGISTRATION_DONE
1009 };
1010
1011 static int create_default_signal(const char *name, uint16_t data_mask)
1012 {
1013 struct signal *sig = create_signal(name);
1014 if (!sig) {
1015 LOG_ERROR("failed to create signal %s", name);
1016 return ERROR_FAIL;
1017 }
1018 sig->invert_data = false;
1019 sig->data_mask = data_mask;
1020 sig->invert_oe = false;
1021 sig->oe_mask = 0;
1022
1023 return ERROR_OK;
1024 }
1025
1026 static int create_signals(void)
1027 {
1028 if (create_default_signal("TCK", 0x01) != ERROR_OK)
1029 return ERROR_FAIL;
1030 if (create_default_signal("TDI", 0x02) != ERROR_OK)
1031 return ERROR_FAIL;
1032 if (create_default_signal("TDO", 0x04) != ERROR_OK)
1033 return ERROR_FAIL;
1034 if (create_default_signal("TMS", 0x08) != ERROR_OK)
1035 return ERROR_FAIL;
1036 return ERROR_OK;
1037 }
1038
1039 static int ftdi_swd_init(void)
1040 {
1041 LOG_INFO("FTDI SWD mode enabled");
1042 swd_mode = true;
1043
1044 if (create_signals() != ERROR_OK)
1045 return ERROR_FAIL;
1046
1047 swd_cmd_queue_alloced = 10;
1048 swd_cmd_queue = malloc(swd_cmd_queue_alloced * sizeof(*swd_cmd_queue));
1049
1050 return swd_cmd_queue ? ERROR_OK : ERROR_FAIL;
1051 }
1052
1053 static void ftdi_swd_swdio_en(bool enable)
1054 {
1055 struct signal *oe = find_signal_by_name("SWDIO_OE");
1056 if (oe) {
1057 if (oe->data_mask)
1058 ftdi_set_signal(oe, enable ? '1' : '0');
1059 else {
1060 /* Sets TDI/DO pin to input during rx when both pins are connected
1061 to SWDIO */
1062 if (enable)
1063 direction |= jtag_direction_init & 0x0002U;
1064 else
1065 direction &= ~0x0002U;
1066 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
1067 }
1068 }
1069 }
1070
1071 /**
1072 * Flush the MPSSE queue and process the SWD transaction queue
1073 * @return
1074 */
1075 static int ftdi_swd_run_queue(void)
1076 {
1077 LOG_DEBUG_IO("Executing %zu queued transactions", swd_cmd_queue_length);
1078 int retval;
1079 struct signal *led = find_signal_by_name("LED");
1080
1081 if (queued_retval != ERROR_OK) {
1082 LOG_DEBUG_IO("Skipping due to previous errors: %d", queued_retval);
1083 goto skip;
1084 }
1085
1086 /* A transaction must be followed by another transaction or at least 8 idle cycles to
1087 * ensure that data is clocked through the AP. */
1088 mpsse_clock_data_out(mpsse_ctx, NULL, 0, 8, SWD_MODE);
1089
1090 /* Terminate the "blink", if the current layout has that feature */
1091 if (led)
1092 ftdi_set_signal(led, '0');
1093
1094 queued_retval = mpsse_flush(mpsse_ctx);
1095 if (queued_retval != ERROR_OK) {
1096 LOG_ERROR("MPSSE failed");
1097 goto skip;
1098 }
1099
1100 for (size_t i = 0; i < swd_cmd_queue_length; i++) {
1101 int ack = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1, 3);
1102
1103 /* Devices do not reply to DP_TARGETSEL write cmd, ignore received ack */
1104 bool check_ack = swd_cmd_returns_ack(swd_cmd_queue[i].cmd);
1105
1106 LOG_DEBUG_IO("%s%s %s %s reg %X = %08"PRIx32,
1107 check_ack ? "" : "ack ignored ",
1108 ack == SWD_ACK_OK ? "OK" : ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK",
1109 swd_cmd_queue[i].cmd & SWD_CMD_APNDP ? "AP" : "DP",
1110 swd_cmd_queue[i].cmd & SWD_CMD_RNW ? "read" : "write",
1111 (swd_cmd_queue[i].cmd & SWD_CMD_A32) >> 1,
1112 buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn,
1113 1 + 3 + (swd_cmd_queue[i].cmd & SWD_CMD_RNW ? 0 : 1), 32));
1114
1115 if (ack != SWD_ACK_OK && check_ack) {
1116 queued_retval = swd_ack_to_error_code(ack);
1117 goto skip;
1118
1119 } else if (swd_cmd_queue[i].cmd & SWD_CMD_RNW) {
1120 uint32_t data = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3, 32);
1121 int parity = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 32, 1);
1122
1123 if (parity != parity_u32(data)) {
1124 LOG_ERROR("SWD Read data parity mismatch");
1125 queued_retval = ERROR_FAIL;
1126 goto skip;
1127 }
1128
1129 if (swd_cmd_queue[i].dst)
1130 *swd_cmd_queue[i].dst = data;
1131 }
1132 }
1133
1134 skip:
1135 swd_cmd_queue_length = 0;
1136 retval = queued_retval;
1137 queued_retval = ERROR_OK;
1138
1139 /* Queue a new "blink" */
1140 if (led && retval == ERROR_OK)
1141 ftdi_set_signal(led, '1');
1142
1143 return retval;
1144 }
1145
1146 static void ftdi_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data, uint32_t ap_delay_clk)
1147 {
1148 if (swd_cmd_queue_length >= swd_cmd_queue_alloced) {
1149 /* Not enough room in the queue. Run the queue and increase its size for next time.
1150 * Note that it's not possible to avoid running the queue here, because mpsse contains
1151 * pointers into the queue which may be invalid after the realloc. */
1152 queued_retval = ftdi_swd_run_queue();
1153 struct swd_cmd_queue_entry *q = realloc(swd_cmd_queue, swd_cmd_queue_alloced * 2 * sizeof(*swd_cmd_queue));
1154 if (q) {
1155 swd_cmd_queue = q;
1156 swd_cmd_queue_alloced *= 2;
1157 LOG_DEBUG("Increased SWD command queue to %zu elements", swd_cmd_queue_alloced);
1158 }
1159 }
1160
1161 if (queued_retval != ERROR_OK)
1162 return;
1163
1164 size_t i = swd_cmd_queue_length++;
1165 swd_cmd_queue[i].cmd = cmd | SWD_CMD_START | SWD_CMD_PARK;
1166
1167 mpsse_clock_data_out(mpsse_ctx, &swd_cmd_queue[i].cmd, 0, 8, SWD_MODE);
1168
1169 if (swd_cmd_queue[i].cmd & SWD_CMD_RNW) {
1170 /* Queue a read transaction */
1171 swd_cmd_queue[i].dst = dst;
1172
1173 ftdi_swd_swdio_en(false);
1174 mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1175 0, 1 + 3 + 32 + 1 + 1, SWD_MODE);
1176 ftdi_swd_swdio_en(true);
1177 } else {
1178 /* Queue a write transaction */
1179 ftdi_swd_swdio_en(false);
1180
1181 mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1182 0, 1 + 3 + 1, SWD_MODE);
1183
1184 ftdi_swd_swdio_en(true);
1185
1186 buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1, 32, data);
1187 buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1 + 32, 1, parity_u32(data));
1188
1189 mpsse_clock_data_out(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1190 1 + 3 + 1, 32 + 1, SWD_MODE);
1191 }
1192
1193 /* Insert idle cycles after AP accesses to avoid WAIT */
1194 if (cmd & SWD_CMD_APNDP)
1195 mpsse_clock_data_out(mpsse_ctx, NULL, 0, ap_delay_clk, SWD_MODE);
1196
1197 }
1198
1199 static void ftdi_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
1200 {
1201 assert(cmd & SWD_CMD_RNW);
1202 ftdi_swd_queue_cmd(cmd, value, 0, ap_delay_clk);
1203 }
1204
1205 static void ftdi_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
1206 {
1207 assert(!(cmd & SWD_CMD_RNW));
1208 ftdi_swd_queue_cmd(cmd, NULL, value, ap_delay_clk);
1209 }
1210
1211 static int ftdi_swd_switch_seq(enum swd_special_seq seq)
1212 {
1213 switch (seq) {
1214 case LINE_RESET:
1215 LOG_DEBUG("SWD line reset");
1216 ftdi_swd_swdio_en(true);
1217 mpsse_clock_data_out(mpsse_ctx, swd_seq_line_reset, 0, swd_seq_line_reset_len, SWD_MODE);
1218 break;
1219 case JTAG_TO_SWD:
1220 LOG_DEBUG("JTAG-to-SWD");
1221 ftdi_swd_swdio_en(true);
1222 mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_swd, 0, swd_seq_jtag_to_swd_len, SWD_MODE);
1223 break;
1224 case JTAG_TO_DORMANT:
1225 LOG_DEBUG("JTAG-to-DORMANT");
1226 ftdi_swd_swdio_en(true);
1227 mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_dormant, 0, swd_seq_jtag_to_dormant_len, SWD_MODE);
1228 break;
1229 case SWD_TO_JTAG:
1230 LOG_DEBUG("SWD-to-JTAG");
1231 ftdi_swd_swdio_en(true);
1232 mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_jtag, 0, swd_seq_swd_to_jtag_len, SWD_MODE);
1233 break;
1234 case SWD_TO_DORMANT:
1235 LOG_DEBUG("SWD-to-DORMANT");
1236 ftdi_swd_swdio_en(true);
1237 mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_dormant, 0, swd_seq_swd_to_dormant_len, SWD_MODE);
1238 break;
1239 case DORMANT_TO_SWD:
1240 LOG_DEBUG("DORMANT-to-SWD");
1241 ftdi_swd_swdio_en(true);
1242 mpsse_clock_data_out(mpsse_ctx, swd_seq_dormant_to_swd, 0, swd_seq_dormant_to_swd_len, SWD_MODE);
1243 break;
1244 case DORMANT_TO_JTAG:
1245 LOG_DEBUG("DORMANT-to-JTAG");
1246 ftdi_swd_swdio_en(true);
1247 mpsse_clock_data_out(mpsse_ctx, swd_seq_dormant_to_jtag, 0, swd_seq_dormant_to_jtag_len, SWD_MODE);
1248 break;
1249 default:
1250 LOG_ERROR("Sequence %d not supported", seq);
1251 return ERROR_FAIL;
1252 }
1253
1254 return ERROR_OK;
1255 }
1256
1257 static const struct swd_driver ftdi_swd = {
1258 .init = ftdi_swd_init,
1259 .switch_seq = ftdi_swd_switch_seq,
1260 .read_reg = ftdi_swd_read_reg,
1261 .write_reg = ftdi_swd_write_reg,
1262 .run = ftdi_swd_run_queue,
1263 };
1264
1265 static const char * const ftdi_transports[] = { "jtag", "swd", NULL };
1266
1267 static struct jtag_interface ftdi_interface = {
1268 .supported = DEBUG_CAP_TMS_SEQ,
1269 .execute_queue = ftdi_execute_queue,
1270 };
1271
1272 struct adapter_driver ftdi_adapter_driver = {
1273 .name = "ftdi",
1274 .transports = ftdi_transports,
1275 .commands = ftdi_command_handlers,
1276
1277 .init = ftdi_initialize,
1278 .quit = ftdi_quit,
1279 .reset = ftdi_reset,
1280 .speed = ftdi_speed,
1281 .khz = ftdi_khz,
1282 .speed_div = ftdi_speed_div,
1283
1284 .jtag_ops = &ftdi_interface,
1285 .swd_ops = &ftdi_swd,
1286 };
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