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jtag: align adapter speed code to new structure
[openocd.git] / src / jtag / drivers / ftdi.c
blob6e2e18450bf08d162c8106ede3cb3ebf4e6b6d0e
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 char *ftdi_serial;
94 static uint8_t ftdi_channel;
95 static uint8_t ftdi_jtag_mode = JTAG_MODE;
96
97 static bool swd_mode;
98
99 #define MAX_USB_IDS 8
100 /* vid = pid = 0 marks the end of the list */
101 static uint16_t ftdi_vid[MAX_USB_IDS + 1] = { 0 };
102 static uint16_t ftdi_pid[MAX_USB_IDS + 1] = { 0 };
103
104 static struct mpsse_ctx *mpsse_ctx;
105
106 struct signal {
107 const char *name;
108 uint16_t data_mask;
109 uint16_t input_mask;
110 uint16_t oe_mask;
111 bool invert_data;
112 bool invert_input;
113 bool invert_oe;
114 struct signal *next;
115 };
116
117 static struct signal *signals;
118
119 /* FIXME: Where to store per-instance data? We need an SWD context. */
120 static struct swd_cmd_queue_entry {
121 uint8_t cmd;
122 uint32_t *dst;
123 uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)];
124 } *swd_cmd_queue;
125 static size_t swd_cmd_queue_length;
126 static size_t swd_cmd_queue_alloced;
127 static int queued_retval;
128 static int freq;
129
130 static uint16_t output;
131 static uint16_t direction;
132 static uint16_t jtag_output_init;
133 static uint16_t jtag_direction_init;
134
135 static int ftdi_swd_switch_seq(enum swd_special_seq seq);
136
137 static struct signal *find_signal_by_name(const char *name)
138 {
139 for (struct signal *sig = signals; sig; sig = sig->next) {
140 if (strcmp(name, sig->name) == 0)
141 return sig;
142 }
143 return NULL;
144 }
145
146 static struct signal *create_signal(const char *name)
147 {
148 struct signal **psig = &signals;
149 while (*psig)
150 psig = &(*psig)->next;
151
152 *psig = calloc(1, sizeof(**psig));
153 if (!*psig)
154 return NULL;
155
156 (*psig)->name = strdup(name);
157 if (!(*psig)->name) {
158 free(*psig);
159 *psig = NULL;
160 }
161 return *psig;
162 }
163
164 static int ftdi_set_signal(const struct signal *s, char value)
165 {
166 bool data;
167 bool oe;
168
169 if (s->data_mask == 0 && s->oe_mask == 0) {
170 LOG_ERROR("interface doesn't provide signal '%s'", s->name);
171 return ERROR_FAIL;
172 }
173 switch (value) {
174 case '0':
175 data = s->invert_data;
176 oe = !s->invert_oe;
177 break;
178 case '1':
179 if (s->data_mask == 0) {
180 LOG_ERROR("interface can't drive '%s' high", s->name);
181 return ERROR_FAIL;
182 }
183 data = !s->invert_data;
184 oe = !s->invert_oe;
185 break;
186 case 'z':
187 case 'Z':
188 if (s->oe_mask == 0) {
189 LOG_ERROR("interface can't tri-state '%s'", s->name);
190 return ERROR_FAIL;
191 }
192 data = s->invert_data;
193 oe = s->invert_oe;
194 break;
195 default:
196 assert(0 && "invalid signal level specifier");
197 return ERROR_FAIL;
198 }
199
200 uint16_t old_output = output;
201 uint16_t old_direction = direction;
202
203 output = data ? output | s->data_mask : output & ~s->data_mask;
204 if (s->oe_mask == s->data_mask)
205 direction = oe ? direction | s->oe_mask : direction & ~s->oe_mask;
206 else
207 output = oe ? output | s->oe_mask : output & ~s->oe_mask;
208
209 if ((output & 0xff) != (old_output & 0xff) || (direction & 0xff) != (old_direction & 0xff))
210 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
211 if ((output >> 8 != old_output >> 8) || (direction >> 8 != old_direction >> 8))
212 mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
213
214 return ERROR_OK;
215 }
216
217 static int ftdi_get_signal(const struct signal *s, uint16_t *value_out)
218 {
219 uint8_t data_low = 0;
220 uint8_t data_high = 0;
221
222 if (s->input_mask == 0) {
223 LOG_ERROR("interface doesn't provide signal '%s'", s->name);
224 return ERROR_FAIL;
225 }
226
227 if (s->input_mask & 0xff)
228 mpsse_read_data_bits_low_byte(mpsse_ctx, &data_low);
229 if (s->input_mask >> 8)
230 mpsse_read_data_bits_high_byte(mpsse_ctx, &data_high);
231
232 mpsse_flush(mpsse_ctx);
233
234 *value_out = (((uint16_t)data_high) << 8) | data_low;
235
236 if (s->invert_input)
237 *value_out = ~(*value_out);
238
239 *value_out &= s->input_mask;
240
241 return ERROR_OK;
242 }
243
244 /**
245 * Function move_to_state
246 * moves the TAP controller from the current state to a
247 * \a goal_state through a path given by tap_get_tms_path(). State transition
248 * logging is performed by delegation to clock_tms().
249 *
250 * @param goal_state is the destination state for the move.
251 */
252 static void move_to_state(tap_state_t goal_state)
253 {
254 tap_state_t start_state = tap_get_state();
255
256 /* goal_state is 1/2 of a tuple/pair of states which allow convenient
257 lookup of the required TMS pattern to move to this state from the
258 start state.
259 */
260
261 /* do the 2 lookups */
262 uint8_t tms_bits = tap_get_tms_path(start_state, goal_state);
263 int tms_count = tap_get_tms_path_len(start_state, goal_state);
264 assert(tms_count <= 8);
265
266 LOG_DEBUG_IO("start=%s goal=%s", tap_state_name(start_state), tap_state_name(goal_state));
267
268 /* Track state transitions step by step */
269 for (int i = 0; i < tms_count; i++)
270 tap_set_state(tap_state_transition(tap_get_state(), (tms_bits >> i) & 1));
271
272 mpsse_clock_tms_cs_out(mpsse_ctx,
273 &tms_bits,
274 0,
275 tms_count,
276 false,
277 ftdi_jtag_mode);
278 }
279
280 static int ftdi_speed(int speed)
281 {
282 int retval;
283 retval = mpsse_set_frequency(mpsse_ctx, speed);
284
285 if (retval < 0) {
286 LOG_ERROR("couldn't set FTDI TCK speed");
287 return retval;
288 }
289
290 if (!swd_mode && speed >= 10000000 && ftdi_jtag_mode != JTAG_MODE_ALT)
291 LOG_INFO("ftdi: if you experience problems at higher adapter clocks, try "
292 "the command \"ftdi tdo_sample_edge falling\"");
293 return ERROR_OK;
294 }
295
296 static int ftdi_speed_div(int speed, int *khz)
297 {
298 *khz = speed / 1000;
299 return ERROR_OK;
300 }
301
302 static int ftdi_khz(int khz, int *jtag_speed)
303 {
304 if (khz == 0 && !mpsse_is_high_speed(mpsse_ctx)) {
305 LOG_DEBUG("RCLK not supported");
306 return ERROR_FAIL;
307 }
308
309 *jtag_speed = khz * 1000;
310 return ERROR_OK;
311 }
312
313 static void ftdi_end_state(tap_state_t state)
314 {
315 if (tap_is_state_stable(state))
316 tap_set_end_state(state);
317 else {
318 LOG_ERROR("BUG: %s is not a stable end state", tap_state_name(state));
319 exit(-1);
320 }
321 }
322
323 static void ftdi_execute_runtest(struct jtag_command *cmd)
324 {
325 int i;
326 uint8_t zero = 0;
327
328 LOG_DEBUG_IO("runtest %i cycles, end in %s",
329 cmd->cmd.runtest->num_cycles,
330 tap_state_name(cmd->cmd.runtest->end_state));
331
332 if (tap_get_state() != TAP_IDLE)
333 move_to_state(TAP_IDLE);
334
335 /* TODO: Reuse ftdi_execute_stableclocks */
336 i = cmd->cmd.runtest->num_cycles;
337 while (i > 0) {
338 /* there are no state transitions in this code, so omit state tracking */
339 unsigned this_len = i > 7 ? 7 : i;
340 mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, ftdi_jtag_mode);
341 i -= this_len;
342 }
343
344 ftdi_end_state(cmd->cmd.runtest->end_state);
345
346 if (tap_get_state() != tap_get_end_state())
347 move_to_state(tap_get_end_state());
348
349 LOG_DEBUG_IO("runtest: %i, end in %s",
350 cmd->cmd.runtest->num_cycles,
351 tap_state_name(tap_get_end_state()));
352 }
353
354 static void ftdi_execute_statemove(struct jtag_command *cmd)
355 {
356 LOG_DEBUG_IO("statemove end in %s",
357 tap_state_name(cmd->cmd.statemove->end_state));
358
359 ftdi_end_state(cmd->cmd.statemove->end_state);
360
361 /* shortest-path move to desired end state */
362 if (tap_get_state() != tap_get_end_state() || tap_get_end_state() == TAP_RESET)
363 move_to_state(tap_get_end_state());
364 }
365
366 /**
367 * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
368 * (or SWD) state machine. REVISIT: Not the best method, perhaps.
369 */
370 static void ftdi_execute_tms(struct jtag_command *cmd)
371 {
372 LOG_DEBUG_IO("TMS: %d bits", cmd->cmd.tms->num_bits);
373
374 /* TODO: Missing tap state tracking, also missing from ft2232.c! */
375 mpsse_clock_tms_cs_out(mpsse_ctx,
376 cmd->cmd.tms->bits,
377 0,
378 cmd->cmd.tms->num_bits,
379 false,
380 ftdi_jtag_mode);
381 }
382
383 static void ftdi_execute_pathmove(struct jtag_command *cmd)
384 {
385 tap_state_t *path = cmd->cmd.pathmove->path;
386 int num_states = cmd->cmd.pathmove->num_states;
387
388 LOG_DEBUG_IO("pathmove: %i states, current: %s end: %s", num_states,
389 tap_state_name(tap_get_state()),
390 tap_state_name(path[num_states-1]));
391
392 int state_count = 0;
393 unsigned bit_count = 0;
394 uint8_t tms_byte = 0;
395
396 LOG_DEBUG_IO("-");
397
398 /* this loop verifies that the path is legal and logs each state in the path */
399 while (num_states--) {
400
401 /* either TMS=0 or TMS=1 must work ... */
402 if (tap_state_transition(tap_get_state(), false)
403 == path[state_count])
404 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
405 else if (tap_state_transition(tap_get_state(), true)
406 == path[state_count]) {
407 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
408
409 /* ... or else the caller goofed BADLY */
410 } else {
411 LOG_ERROR("BUG: %s -> %s isn't a valid "
412 "TAP state transition",
413 tap_state_name(tap_get_state()),
414 tap_state_name(path[state_count]));
415 exit(-1);
416 }
417
418 tap_set_state(path[state_count]);
419 state_count++;
420
421 if (bit_count == 7 || num_states == 0) {
422 mpsse_clock_tms_cs_out(mpsse_ctx,
423 &tms_byte,
424 0,
425 bit_count,
426 false,
427 ftdi_jtag_mode);
428 bit_count = 0;
429 }
430 }
431 tap_set_end_state(tap_get_state());
432 }
433
434 static void ftdi_execute_scan(struct jtag_command *cmd)
435 {
436 LOG_DEBUG_IO("%s type:%d", cmd->cmd.scan->ir_scan ? "IRSCAN" : "DRSCAN",
437 jtag_scan_type(cmd->cmd.scan));
438
439 /* Make sure there are no trailing fields with num_bits == 0, or the logic below will fail. */
440 while (cmd->cmd.scan->num_fields > 0
441 && cmd->cmd.scan->fields[cmd->cmd.scan->num_fields - 1].num_bits == 0) {
442 cmd->cmd.scan->num_fields--;
443 LOG_DEBUG_IO("discarding trailing empty field");
444 }
445
446 if (cmd->cmd.scan->num_fields == 0) {
447 LOG_DEBUG_IO("empty scan, doing nothing");
448 return;
449 }
450
451 if (cmd->cmd.scan->ir_scan) {
452 if (tap_get_state() != TAP_IRSHIFT)
453 move_to_state(TAP_IRSHIFT);
454 } else {
455 if (tap_get_state() != TAP_DRSHIFT)
456 move_to_state(TAP_DRSHIFT);
457 }
458
459 ftdi_end_state(cmd->cmd.scan->end_state);
460
461 struct scan_field *field = cmd->cmd.scan->fields;
462 unsigned scan_size = 0;
463
464 for (int i = 0; i < cmd->cmd.scan->num_fields; i++, field++) {
465 scan_size += field->num_bits;
466 LOG_DEBUG_IO("%s%s field %d/%d %d bits",
467 field->in_value ? "in" : "",
468 field->out_value ? "out" : "",
469 i,
470 cmd->cmd.scan->num_fields,
471 field->num_bits);
472
473 if (i == cmd->cmd.scan->num_fields - 1 && tap_get_state() != tap_get_end_state()) {
474 /* Last field, and we're leaving IRSHIFT/DRSHIFT. Clock last bit during tap
475 * movement. This last field can't have length zero, it was checked above. */
476 mpsse_clock_data(mpsse_ctx,
477 field->out_value,
478 0,
479 field->in_value,
480 0,
481 field->num_bits - 1,
482 ftdi_jtag_mode);
483 uint8_t last_bit = 0;
484 if (field->out_value)
485 bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1);
486
487 /* If endstate is TAP_IDLE, clock out 1-1-0 (->EXIT1 ->UPDATE ->IDLE)
488 * Otherwise, clock out 1-0 (->EXIT1 ->PAUSE)
489 */
490 uint8_t tms_bits = 0x03;
491 mpsse_clock_tms_cs(mpsse_ctx,
492 &tms_bits,
493 0,
494 field->in_value,
495 field->num_bits - 1,
496 1,
497 last_bit,
498 ftdi_jtag_mode);
499 tap_set_state(tap_state_transition(tap_get_state(), 1));
500 if (tap_get_end_state() == TAP_IDLE) {
501 mpsse_clock_tms_cs_out(mpsse_ctx,
502 &tms_bits,
503 1,
504 2,
505 last_bit,
506 ftdi_jtag_mode);
507 tap_set_state(tap_state_transition(tap_get_state(), 1));
508 tap_set_state(tap_state_transition(tap_get_state(), 0));
509 } else {
510 mpsse_clock_tms_cs_out(mpsse_ctx,
511 &tms_bits,
512 2,
513 1,
514 last_bit,
515 ftdi_jtag_mode);
516 tap_set_state(tap_state_transition(tap_get_state(), 0));
517 }
518 } else
519 mpsse_clock_data(mpsse_ctx,
520 field->out_value,
521 0,
522 field->in_value,
523 0,
524 field->num_bits,
525 ftdi_jtag_mode);
526 }
527
528 if (tap_get_state() != tap_get_end_state())
529 move_to_state(tap_get_end_state());
530
531 LOG_DEBUG_IO("%s scan, %i bits, end in %s",
532 (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
533 tap_state_name(tap_get_end_state()));
534 }
535
536 static int ftdi_reset(int trst, int srst)
537 {
538 struct signal *sig_ntrst = find_signal_by_name("nTRST");
539 struct signal *sig_nsrst = find_signal_by_name("nSRST");
540
541 LOG_DEBUG_IO("reset trst: %i srst %i", trst, srst);
542
543 if (!swd_mode) {
544 if (trst == 1) {
545 if (sig_ntrst)
546 ftdi_set_signal(sig_ntrst, '0');
547 else
548 LOG_ERROR("Can't assert TRST: nTRST signal is not defined");
549 } else if (sig_ntrst && jtag_get_reset_config() & RESET_HAS_TRST &&
550 trst == 0) {
551 if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
552 ftdi_set_signal(sig_ntrst, 'z');
553 else
554 ftdi_set_signal(sig_ntrst, '1');
555 }
556 }
557
558 if (srst == 1) {
559 if (sig_nsrst)
560 ftdi_set_signal(sig_nsrst, '0');
561 else
562 LOG_ERROR("Can't assert SRST: nSRST signal is not defined");
563 } else if (sig_nsrst && jtag_get_reset_config() & RESET_HAS_SRST &&
564 srst == 0) {
565 if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
566 ftdi_set_signal(sig_nsrst, '1');
567 else
568 ftdi_set_signal(sig_nsrst, 'z');
569 }
570
571 return mpsse_flush(mpsse_ctx);
572 }
573
574 static void ftdi_execute_sleep(struct jtag_command *cmd)
575 {
576 LOG_DEBUG_IO("sleep %" PRIu32, cmd->cmd.sleep->us);
577
578 mpsse_flush(mpsse_ctx);
579 jtag_sleep(cmd->cmd.sleep->us);
580 LOG_DEBUG_IO("sleep %" PRIu32 " usec while in %s",
581 cmd->cmd.sleep->us,
582 tap_state_name(tap_get_state()));
583 }
584
585 static void ftdi_execute_stableclocks(struct jtag_command *cmd)
586 {
587 /* this is only allowed while in a stable state. A check for a stable
588 * state was done in jtag_add_clocks()
589 */
590 int num_cycles = cmd->cmd.stableclocks->num_cycles;
591
592 /* 7 bits of either ones or zeros. */
593 uint8_t tms = tap_get_state() == TAP_RESET ? 0x7f : 0x00;
594
595 /* TODO: Use mpsse_clock_data with in=out=0 for this, if TMS can be set to
596 * the correct level and remain there during the scan */
597 while (num_cycles > 0) {
598 /* there are no state transitions in this code, so omit state tracking */
599 unsigned this_len = num_cycles > 7 ? 7 : num_cycles;
600 mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, ftdi_jtag_mode);
601 num_cycles -= this_len;
602 }
603
604 LOG_DEBUG_IO("clocks %i while in %s",
605 cmd->cmd.stableclocks->num_cycles,
606 tap_state_name(tap_get_state()));
607 }
608
609 static void ftdi_execute_command(struct jtag_command *cmd)
610 {
611 switch (cmd->type) {
612 case JTAG_RUNTEST:
613 ftdi_execute_runtest(cmd);
614 break;
615 case JTAG_TLR_RESET:
616 ftdi_execute_statemove(cmd);
617 break;
618 case JTAG_PATHMOVE:
619 ftdi_execute_pathmove(cmd);
620 break;
621 case JTAG_SCAN:
622 ftdi_execute_scan(cmd);
623 break;
624 case JTAG_SLEEP:
625 ftdi_execute_sleep(cmd);
626 break;
627 case JTAG_STABLECLOCKS:
628 ftdi_execute_stableclocks(cmd);
629 break;
630 case JTAG_TMS:
631 ftdi_execute_tms(cmd);
632 break;
633 default:
634 LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
635 break;
636 }
637 }
638
639 static int ftdi_execute_queue(void)
640 {
641 /* blink, if the current layout has that feature */
642 struct signal *led = find_signal_by_name("LED");
643 if (led)
644 ftdi_set_signal(led, '1');
645
646 for (struct jtag_command *cmd = jtag_command_queue; cmd; cmd = cmd->next) {
647 /* fill the write buffer with the desired command */
648 ftdi_execute_command(cmd);
649 }
650
651 if (led)
652 ftdi_set_signal(led, '0');
653
654 int retval = mpsse_flush(mpsse_ctx);
655 if (retval != ERROR_OK)
656 LOG_ERROR("error while flushing MPSSE queue: %d", retval);
657
658 return retval;
659 }
660
661 static int ftdi_initialize(void)
662 {
663 if (tap_get_tms_path_len(TAP_IRPAUSE, TAP_IRPAUSE) == 7)
664 LOG_DEBUG("ftdi interface using 7 step jtag state transitions");
665 else
666 LOG_DEBUG("ftdi interface using shortest path jtag state transitions");
667
668 if (!ftdi_vid[0] && !ftdi_pid[0]) {
669 LOG_ERROR("Please specify ftdi vid_pid");
670 return ERROR_JTAG_INIT_FAILED;
671 }
672
673 for (int i = 0; ftdi_vid[i] || ftdi_pid[i]; i++) {
674 mpsse_ctx = mpsse_open(&ftdi_vid[i], &ftdi_pid[i], ftdi_device_desc,
675 ftdi_serial, adapter_usb_get_location(), ftdi_channel);
676 if (mpsse_ctx)
677 break;
678 }
679
680 if (!mpsse_ctx)
681 return ERROR_JTAG_INIT_FAILED;
682
683 output = jtag_output_init;
684 direction = jtag_direction_init;
685
686 if (swd_mode) {
687 struct signal *sig = find_signal_by_name("SWD_EN");
688 if (!sig) {
689 LOG_ERROR("SWD mode is active but SWD_EN signal is not defined");
690 return ERROR_JTAG_INIT_FAILED;
691 }
692 /* A dummy SWD_EN would have zero mask */
693 if (sig->data_mask)
694 ftdi_set_signal(sig, '1');
695 }
696
697 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
698 mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
699
700 mpsse_loopback_config(mpsse_ctx, false);
701
702 freq = mpsse_set_frequency(mpsse_ctx, adapter_get_speed_khz() * 1000);
703
704 return mpsse_flush(mpsse_ctx);
705 }
706
707 static int ftdi_quit(void)
708 {
709 mpsse_close(mpsse_ctx);
710
711 struct signal *sig = signals;
712 while (sig) {
713 struct signal *next = sig->next;
714 free((void *)sig->name);
715 free(sig);
716 sig = next;
717 }
718
719 free(ftdi_device_desc);
720 free(ftdi_serial);
721
722 free(swd_cmd_queue);
723
724 return ERROR_OK;
725 }
726
727 COMMAND_HANDLER(ftdi_handle_device_desc_command)
728 {
729 if (CMD_ARGC == 1) {
730 free(ftdi_device_desc);
731 ftdi_device_desc = strdup(CMD_ARGV[0]);
732 } else {
733 LOG_ERROR("expected exactly one argument to ftdi device_desc <description>");
734 }
735
736 return ERROR_OK;
737 }
738
739 COMMAND_HANDLER(ftdi_handle_serial_command)
740 {
741 if (CMD_ARGC == 1) {
742 free(ftdi_serial);
743 ftdi_serial = strdup(CMD_ARGV[0]);
744 } else {
745 return ERROR_COMMAND_SYNTAX_ERROR;
746 }
747
748 return ERROR_OK;
749 }
750
751 COMMAND_HANDLER(ftdi_handle_channel_command)
752 {
753 if (CMD_ARGC == 1)
754 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], ftdi_channel);
755 else
756 return ERROR_COMMAND_SYNTAX_ERROR;
757
758 return ERROR_OK;
759 }
760
761 COMMAND_HANDLER(ftdi_handle_layout_init_command)
762 {
763 if (CMD_ARGC != 2)
764 return ERROR_COMMAND_SYNTAX_ERROR;
765
766 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], jtag_output_init);
767 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], jtag_direction_init);
768
769 return ERROR_OK;
770 }
771
772 COMMAND_HANDLER(ftdi_handle_layout_signal_command)
773 {
774 if (CMD_ARGC < 1)
775 return ERROR_COMMAND_SYNTAX_ERROR;
776
777 bool invert_data = false;
778 uint16_t data_mask = 0;
779 bool invert_input = false;
780 uint16_t input_mask = 0;
781 bool invert_oe = false;
782 uint16_t oe_mask = 0;
783 for (unsigned i = 1; i < CMD_ARGC; i += 2) {
784 if (strcmp("-data", CMD_ARGV[i]) == 0) {
785 invert_data = false;
786 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
787 } else if (strcmp("-ndata", CMD_ARGV[i]) == 0) {
788 invert_data = true;
789 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
790 } else if (strcmp("-input", CMD_ARGV[i]) == 0) {
791 invert_input = false;
792 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], input_mask);
793 } else if (strcmp("-ninput", CMD_ARGV[i]) == 0) {
794 invert_input = true;
795 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], input_mask);
796 } else if (strcmp("-oe", CMD_ARGV[i]) == 0) {
797 invert_oe = false;
798 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
799 } else if (strcmp("-noe", CMD_ARGV[i]) == 0) {
800 invert_oe = true;
801 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
802 } else if (!strcmp("-alias", CMD_ARGV[i]) ||
803 !strcmp("-nalias", CMD_ARGV[i])) {
804 if (!strcmp("-nalias", CMD_ARGV[i])) {
805 invert_data = true;
806 invert_input = true;
807 }
808 struct signal *sig = find_signal_by_name(CMD_ARGV[i + 1]);
809 if (!sig) {
810 LOG_ERROR("signal %s is not defined", CMD_ARGV[i + 1]);
811 return ERROR_FAIL;
812 }
813 data_mask = sig->data_mask;
814 input_mask = sig->input_mask;
815 oe_mask = sig->oe_mask;
816 invert_input ^= sig->invert_input;
817 invert_oe = sig->invert_oe;
818 invert_data ^= sig->invert_data;
819 } else {
820 LOG_ERROR("unknown option '%s'", CMD_ARGV[i]);
821 return ERROR_COMMAND_SYNTAX_ERROR;
822 }
823 }
824
825 struct signal *sig;
826 sig = find_signal_by_name(CMD_ARGV[0]);
827 if (!sig)
828 sig = create_signal(CMD_ARGV[0]);
829 if (!sig) {
830 LOG_ERROR("failed to create signal %s", CMD_ARGV[0]);
831 return ERROR_FAIL;
832 }
833
834 sig->invert_data = invert_data;
835 sig->data_mask = data_mask;
836 sig->invert_input = invert_input;
837 sig->input_mask = input_mask;
838 sig->invert_oe = invert_oe;
839 sig->oe_mask = oe_mask;
840
841 return ERROR_OK;
842 }
843
844 COMMAND_HANDLER(ftdi_handle_set_signal_command)
845 {
846 if (CMD_ARGC < 2)
847 return ERROR_COMMAND_SYNTAX_ERROR;
848
849 struct signal *sig;
850 sig = find_signal_by_name(CMD_ARGV[0]);
851 if (!sig) {
852 LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
853 return ERROR_FAIL;
854 }
855
856 switch (*CMD_ARGV[1]) {
857 case '0':
858 case '1':
859 case 'z':
860 case 'Z':
861 /* single character level specifier only */
862 if (CMD_ARGV[1][1] == '\0') {
863 ftdi_set_signal(sig, *CMD_ARGV[1]);
864 break;
865 }
866 /* fallthrough */
867 default:
868 LOG_ERROR("unknown signal level '%s', use 0, 1 or z", CMD_ARGV[1]);
869 return ERROR_COMMAND_SYNTAX_ERROR;
870 }
871
872 return mpsse_flush(mpsse_ctx);
873 }
874
875 COMMAND_HANDLER(ftdi_handle_get_signal_command)
876 {
877 if (CMD_ARGC < 1)
878 return ERROR_COMMAND_SYNTAX_ERROR;
879
880 struct signal *sig;
881 uint16_t sig_data = 0;
882 sig = find_signal_by_name(CMD_ARGV[0]);
883 if (!sig) {
884 LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
885 return ERROR_FAIL;
886 }
887
888 int ret = ftdi_get_signal(sig, &sig_data);
889 if (ret != ERROR_OK)
890 return ret;
891
892 LOG_USER("Signal %s = %#06x", sig->name, sig_data);
893
894 return ERROR_OK;
895 }
896
897 COMMAND_HANDLER(ftdi_handle_vid_pid_command)
898 {
899 if (CMD_ARGC > MAX_USB_IDS * 2) {
900 LOG_WARNING("ignoring extra IDs in ftdi vid_pid "
901 "(maximum is %d pairs)", MAX_USB_IDS);
902 CMD_ARGC = MAX_USB_IDS * 2;
903 }
904 if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
905 LOG_WARNING("incomplete ftdi vid_pid configuration directive");
906 if (CMD_ARGC < 2)
907 return ERROR_COMMAND_SYNTAX_ERROR;
908 /* remove the incomplete trailing id */
909 CMD_ARGC -= 1;
910 }
911
912 unsigned i;
913 for (i = 0; i < CMD_ARGC; i += 2) {
914 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], ftdi_vid[i >> 1]);
915 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], ftdi_pid[i >> 1]);
916 }
917
918 /*
919 * Explicitly terminate, in case there are multiples instances of
920 * ftdi vid_pid.
921 */
922 ftdi_vid[i >> 1] = ftdi_pid[i >> 1] = 0;
923
924 return ERROR_OK;
925 }
926
927 COMMAND_HANDLER(ftdi_handle_tdo_sample_edge_command)
928 {
929 struct jim_nvp *n;
930 static const struct jim_nvp nvp_ftdi_jtag_modes[] = {
931 { .name = "rising", .value = JTAG_MODE },
932 { .name = "falling", .value = JTAG_MODE_ALT },
933 { .name = NULL, .value = -1 },
934 };
935
936 if (CMD_ARGC > 0) {
937 n = jim_nvp_name2value_simple(nvp_ftdi_jtag_modes, CMD_ARGV[0]);
938 if (!n->name)
939 return ERROR_COMMAND_SYNTAX_ERROR;
940 ftdi_jtag_mode = n->value;
941
942 }
943
944 n = jim_nvp_value2name_simple(nvp_ftdi_jtag_modes, ftdi_jtag_mode);
945 command_print(CMD, "ftdi samples TDO on %s edge of TCK", n->name);
946
947 return ERROR_OK;
948 }
949
950 static const struct command_registration ftdi_subcommand_handlers[] = {
951 {
952 .name = "device_desc",
953 .handler = &ftdi_handle_device_desc_command,
954 .mode = COMMAND_CONFIG,
955 .help = "set the USB device description of the FTDI device",
956 .usage = "description_string",
957 },
958 {
959 .name = "serial",
960 .handler = &ftdi_handle_serial_command,
961 .mode = COMMAND_CONFIG,
962 .help = "set the serial number of the FTDI device",
963 .usage = "serial_string",
964 },
965 {
966 .name = "channel",
967 .handler = &ftdi_handle_channel_command,
968 .mode = COMMAND_CONFIG,
969 .help = "set the channel of the FTDI device that is used as JTAG",
970 .usage = "(0-3)",
971 },
972 {
973 .name = "layout_init",
974 .handler = &ftdi_handle_layout_init_command,
975 .mode = COMMAND_CONFIG,
976 .help = "initialize the FTDI GPIO signals used "
977 "to control output-enables and reset signals",
978 .usage = "data direction",
979 },
980 {
981 .name = "layout_signal",
982 .handler = &ftdi_handle_layout_signal_command,
983 .mode = COMMAND_ANY,
984 .help = "define a signal controlled by one or more FTDI GPIO as data "
985 "and/or output enable",
986 .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask] [-alias|-nalias name]",
987 },
988 {
989 .name = "set_signal",
990 .handler = &ftdi_handle_set_signal_command,
991 .mode = COMMAND_EXEC,
992 .help = "control a layout-specific signal",
993 .usage = "name (1|0|z)",
994 },
995 {
996 .name = "get_signal",
997 .handler = &ftdi_handle_get_signal_command,
998 .mode = COMMAND_EXEC,
999 .help = "read the value of a layout-specific signal",
1000 .usage = "name",
1001 },
1002 {
1003 .name = "vid_pid",
1004 .handler = &ftdi_handle_vid_pid_command,
1005 .mode = COMMAND_CONFIG,
1006 .help = "the vendor ID and product ID of the FTDI device",
1007 .usage = "(vid pid)*",
1008 },
1009 {
1010 .name = "tdo_sample_edge",
1011 .handler = &ftdi_handle_tdo_sample_edge_command,
1012 .mode = COMMAND_ANY,
1013 .help = "set which TCK clock edge is used for sampling TDO "
1014 "- default is rising-edge (Setting to falling-edge may "
1015 "allow signalling speed increase)",
1016 .usage = "(rising|falling)",
1017 },
1018 COMMAND_REGISTRATION_DONE
1019 };
1020
1021 static const struct command_registration ftdi_command_handlers[] = {
1022 {
1023 .name = "ftdi",
1024 .mode = COMMAND_ANY,
1025 .help = "perform ftdi management",
1026 .chain = ftdi_subcommand_handlers,
1027 .usage = "",
1028 },
1029 COMMAND_REGISTRATION_DONE
1030 };
1031
1032 static int create_default_signal(const char *name, uint16_t data_mask)
1033 {
1034 struct signal *sig = create_signal(name);
1035 if (!sig) {
1036 LOG_ERROR("failed to create signal %s", name);
1037 return ERROR_FAIL;
1038 }
1039 sig->invert_data = false;
1040 sig->data_mask = data_mask;
1041 sig->invert_oe = false;
1042 sig->oe_mask = 0;
1043
1044 return ERROR_OK;
1045 }
1046
1047 static int create_signals(void)
1048 {
1049 if (create_default_signal("TCK", 0x01) != ERROR_OK)
1050 return ERROR_FAIL;
1051 if (create_default_signal("TDI", 0x02) != ERROR_OK)
1052 return ERROR_FAIL;
1053 if (create_default_signal("TDO", 0x04) != ERROR_OK)
1054 return ERROR_FAIL;
1055 if (create_default_signal("TMS", 0x08) != ERROR_OK)
1056 return ERROR_FAIL;
1057 return ERROR_OK;
1058 }
1059
1060 static int ftdi_swd_init(void)
1061 {
1062 LOG_INFO("FTDI SWD mode enabled");
1063 swd_mode = true;
1064
1065 if (create_signals() != ERROR_OK)
1066 return ERROR_FAIL;
1067
1068 swd_cmd_queue_alloced = 10;
1069 swd_cmd_queue = malloc(swd_cmd_queue_alloced * sizeof(*swd_cmd_queue));
1070
1071 return swd_cmd_queue ? ERROR_OK : ERROR_FAIL;
1072 }
1073
1074 static void ftdi_swd_swdio_en(bool enable)
1075 {
1076 struct signal *oe = find_signal_by_name("SWDIO_OE");
1077 if (oe) {
1078 if (oe->data_mask)
1079 ftdi_set_signal(oe, enable ? '1' : '0');
1080 else {
1081 /* Sets TDI/DO pin to input during rx when both pins are connected
1082 to SWDIO */
1083 if (enable)
1084 direction |= jtag_direction_init & 0x0002U;
1085 else
1086 direction &= ~0x0002U;
1087 mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
1088 }
1089 }
1090 }
1091
1092 /**
1093 * Flush the MPSSE queue and process the SWD transaction queue
1094 * @return
1095 */
1096 static int ftdi_swd_run_queue(void)
1097 {
1098 LOG_DEBUG_IO("Executing %zu queued transactions", swd_cmd_queue_length);
1099 int retval;
1100 struct signal *led = find_signal_by_name("LED");
1101
1102 if (queued_retval != ERROR_OK) {
1103 LOG_DEBUG_IO("Skipping due to previous errors: %d", queued_retval);
1104 goto skip;
1105 }
1106
1107 /* A transaction must be followed by another transaction or at least 8 idle cycles to
1108 * ensure that data is clocked through the AP. */
1109 mpsse_clock_data_out(mpsse_ctx, NULL, 0, 8, SWD_MODE);
1110
1111 /* Terminate the "blink", if the current layout has that feature */
1112 if (led)
1113 ftdi_set_signal(led, '0');
1114
1115 queued_retval = mpsse_flush(mpsse_ctx);
1116 if (queued_retval != ERROR_OK) {
1117 LOG_ERROR("MPSSE failed");
1118 goto skip;
1119 }
1120
1121 for (size_t i = 0; i < swd_cmd_queue_length; i++) {
1122 int ack = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1, 3);
1123
1124 LOG_DEBUG_IO("%s %s %s reg %X = %08"PRIx32,
1125 ack == SWD_ACK_OK ? "OK" : ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK",
1126 swd_cmd_queue[i].cmd & SWD_CMD_APNDP ? "AP" : "DP",
1127 swd_cmd_queue[i].cmd & SWD_CMD_RNW ? "read" : "write",
1128 (swd_cmd_queue[i].cmd & SWD_CMD_A32) >> 1,
1129 buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn,
1130 1 + 3 + (swd_cmd_queue[i].cmd & SWD_CMD_RNW ? 0 : 1), 32));
1131
1132 if (ack != SWD_ACK_OK) {
1133 queued_retval = ack == SWD_ACK_WAIT ? ERROR_WAIT : ERROR_FAIL;
1134 goto skip;
1135
1136 } else if (swd_cmd_queue[i].cmd & SWD_CMD_RNW) {
1137 uint32_t data = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3, 32);
1138 int parity = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 32, 1);
1139
1140 if (parity != parity_u32(data)) {
1141 LOG_ERROR("SWD Read data parity mismatch");
1142 queued_retval = ERROR_FAIL;
1143 goto skip;
1144 }
1145
1146 if (swd_cmd_queue[i].dst)
1147 *swd_cmd_queue[i].dst = data;
1148 }
1149 }
1150
1151 skip:
1152 swd_cmd_queue_length = 0;
1153 retval = queued_retval;
1154 queued_retval = ERROR_OK;
1155
1156 /* Queue a new "blink" */
1157 if (led && retval == ERROR_OK)
1158 ftdi_set_signal(led, '1');
1159
1160 return retval;
1161 }
1162
1163 static void ftdi_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data, uint32_t ap_delay_clk)
1164 {
1165 if (swd_cmd_queue_length >= swd_cmd_queue_alloced) {
1166 /* Not enough room in the queue. Run the queue and increase its size for next time.
1167 * Note that it's not possible to avoid running the queue here, because mpsse contains
1168 * pointers into the queue which may be invalid after the realloc. */
1169 queued_retval = ftdi_swd_run_queue();
1170 struct swd_cmd_queue_entry *q = realloc(swd_cmd_queue, swd_cmd_queue_alloced * 2 * sizeof(*swd_cmd_queue));
1171 if (q) {
1172 swd_cmd_queue = q;
1173 swd_cmd_queue_alloced *= 2;
1174 LOG_DEBUG("Increased SWD command queue to %zu elements", swd_cmd_queue_alloced);
1175 }
1176 }
1177
1178 if (queued_retval != ERROR_OK)
1179 return;
1180
1181 size_t i = swd_cmd_queue_length++;
1182 swd_cmd_queue[i].cmd = cmd | SWD_CMD_START | SWD_CMD_PARK;
1183
1184 mpsse_clock_data_out(mpsse_ctx, &swd_cmd_queue[i].cmd, 0, 8, SWD_MODE);
1185
1186 if (swd_cmd_queue[i].cmd & SWD_CMD_RNW) {
1187 /* Queue a read transaction */
1188 swd_cmd_queue[i].dst = dst;
1189
1190 ftdi_swd_swdio_en(false);
1191 mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1192 0, 1 + 3 + 32 + 1 + 1, SWD_MODE);
1193 ftdi_swd_swdio_en(true);
1194 } else {
1195 /* Queue a write transaction */
1196 ftdi_swd_swdio_en(false);
1197
1198 mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1199 0, 1 + 3 + 1, SWD_MODE);
1200
1201 ftdi_swd_swdio_en(true);
1202
1203 buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1, 32, data);
1204 buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1 + 32, 1, parity_u32(data));
1205
1206 mpsse_clock_data_out(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
1207 1 + 3 + 1, 32 + 1, SWD_MODE);
1208 }
1209
1210 /* Insert idle cycles after AP accesses to avoid WAIT */
1211 if (cmd & SWD_CMD_APNDP)
1212 mpsse_clock_data_out(mpsse_ctx, NULL, 0, ap_delay_clk, SWD_MODE);
1213
1214 }
1215
1216 static void ftdi_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
1217 {
1218 assert(cmd & SWD_CMD_RNW);
1219 ftdi_swd_queue_cmd(cmd, value, 0, ap_delay_clk);
1220 }
1221
1222 static void ftdi_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
1223 {
1224 assert(!(cmd & SWD_CMD_RNW));
1225 ftdi_swd_queue_cmd(cmd, NULL, value, ap_delay_clk);
1226 }
1227
1228 static int ftdi_swd_switch_seq(enum swd_special_seq seq)
1229 {
1230 switch (seq) {
1231 case LINE_RESET:
1232 LOG_DEBUG("SWD line reset");
1233 ftdi_swd_swdio_en(true);
1234 mpsse_clock_data_out(mpsse_ctx, swd_seq_line_reset, 0, swd_seq_line_reset_len, SWD_MODE);
1235 break;
1236 case JTAG_TO_SWD:
1237 LOG_DEBUG("JTAG-to-SWD");
1238 ftdi_swd_swdio_en(true);
1239 mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_swd, 0, swd_seq_jtag_to_swd_len, SWD_MODE);
1240 break;
1241 case SWD_TO_JTAG:
1242 LOG_DEBUG("SWD-to-JTAG");
1243 ftdi_swd_swdio_en(true);
1244 mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_jtag, 0, swd_seq_swd_to_jtag_len, SWD_MODE);
1245 break;
1246 default:
1247 LOG_ERROR("Sequence %d not supported", seq);
1248 return ERROR_FAIL;
1249 }
1250
1251 return ERROR_OK;
1252 }
1253
1254 static const struct swd_driver ftdi_swd = {
1255 .init = ftdi_swd_init,
1256 .switch_seq = ftdi_swd_switch_seq,
1257 .read_reg = ftdi_swd_read_reg,
1258 .write_reg = ftdi_swd_write_reg,
1259 .run = ftdi_swd_run_queue,
1260 };
1261
1262 static const char * const ftdi_transports[] = { "jtag", "swd", NULL };
1263
1264 static struct jtag_interface ftdi_interface = {
1265 .supported = DEBUG_CAP_TMS_SEQ,
1266 .execute_queue = ftdi_execute_queue,
1267 };
1268
1269 struct adapter_driver ftdi_adapter_driver = {
1270 .name = "ftdi",
1271 .transports = ftdi_transports,
1272 .commands = ftdi_command_handlers,
1273
1274 .init = ftdi_initialize,
1275 .quit = ftdi_quit,
1276 .reset = ftdi_reset,
1277 .speed = ftdi_speed,
1278 .khz = ftdi_khz,
1279 .speed_div = ftdi_speed_div,
1280
1281 .jtag_ops = &ftdi_interface,
1282 .swd_ops = &ftdi_swd,
1283 };
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