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[openocd.git] / src / jtag / drivers / ftdi.c
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, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
19 ***************************************************************************/
20
21 /**
22 * @file
23 * JTAG adapters based on the FT2232 full and high speed USB parts are
24 * popular low cost JTAG debug solutions. Many FT2232 based JTAG adapters
25 * are discrete, but development boards may integrate them as alternatives
26 * to more capable (and expensive) third party JTAG pods.
27 *
28 * JTAG uses only one of the two communications channels ("MPSSE engines")
29 * on these devices. Adapters based on FT4232 parts have four ports/channels
30 * (A/B/C/D), instead of just two (A/B).
31 *
32 * Especially on development boards integrating one of these chips (as
33 * opposed to discrete pods/dongles), the additional channels can be used
34 * for a variety of purposes, but OpenOCD only uses one channel at a time.
35 *
36 * - As a USB-to-serial adapter for the target's console UART ...
37 * which may be able to support ROM boot loaders that load initial
38 * firmware images to flash (or SRAM).
39 *
40 * - On systems which support ARM's SWD in addition to JTAG, or instead
41 * of it, that second port can be used for reading SWV/SWO trace data.
42 *
43 * - Additional JTAG links, e.g. to a CPLD or * FPGA.
44 *
45 * FT2232 based JTAG adapters are "dumb" not "smart", because most JTAG
46 * request/response interactions involve round trips over the USB link.
47 * A "smart" JTAG adapter has intelligence close to the scan chain, so it
48 * can for example poll quickly for a status change (usually taking on the
49 * order of microseconds not milliseconds) before beginning a queued
50 * transaction which require the previous one to have completed.
51 *
52 * There are dozens of adapters of this type, differing in details which
53 * this driver needs to understand. Those "layout" details are required
54 * as part of FT2232 driver configuration.
55 *
56 * This code uses information contained in the MPSSE specification which was
57 * found here:
58 * http://www.ftdichip.com/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
59 * Hereafter this is called the "MPSSE Spec".
60 *
61 * The datasheet for the ftdichip.com's FT2232D part is here:
62 * http://www.ftdichip.com/Documents/DataSheets/DS_FT2232D.pdf
63 *
64 * Also note the issue with code 0x4b (clock data to TMS) noted in
65 * http://developer.intra2net.com/mailarchive/html/libftdi/2009/msg00292.html
66 * which can affect longer JTAG state paths.
67 */
68
69 #ifdef HAVE_CONFIG_H
70 #include "config.h"
71 #endif
72
73 /* project specific includes */
74 #include <jtag/interface.h>
75 #include <transport/transport.h>
76 #include <helper/time_support.h>
77
78 #if IS_CYGWIN == 1
79 #include <windows.h>
80 #endif
81
82 #include <assert.h>
83
84 /* FTDI access library includes */
85 #include "mpsse.h"
86
87 #define JTAG_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
88
89 static char *ftdi_device_desc;
90 static char *ftdi_serial;
91 static uint8_t ftdi_channel;
92
93 #define MAX_USB_IDS 8
94 /* vid = pid = 0 marks the end of the list */
95 static uint16_t ftdi_vid[MAX_USB_IDS + 1] = { 0 };
96 static uint16_t ftdi_pid[MAX_USB_IDS + 1] = { 0 };
97
98 static struct mpsse_ctx *mpsse_ctx;
99
100 struct signal {
101 const char *name;
102 uint16_t data_mask;
103 uint16_t oe_mask;
104 bool invert_data;
105 bool invert_oe;
106 struct signal *next;
107 };
108
109 static struct signal *signals;
110
111 static uint16_t output;
112 static uint16_t direction;
113
114 static struct signal *find_signal_by_name(const char *name)
115 {
116 for (struct signal *sig = signals; sig; sig = sig->next) {
117 if (strcmp(name, sig->name) == 0)
118 return sig;
119 }
120 return NULL;
121 }
122
123 static struct signal *create_signal(const char *name)
124 {
125 struct signal **psig = &signals;
126 while (*psig)
127 psig = &(*psig)->next;
128
129 *psig = calloc(1, sizeof(**psig));
130 if (*psig == NULL)
131 return NULL;
132
133 (*psig)->name = strdup(name);
134 if ((*psig)->name == NULL) {
135 free(*psig);
136 *psig = NULL;
137 }
138 return *psig;
139 }
140
141 static int ftdi_set_signal(const struct signal *s, char value)
142 {
143 int retval;
144 bool data;
145 bool oe;
146
147 if (s->data_mask == 0 && s->oe_mask == 0) {
148 LOG_ERROR("interface doesn't provide signal '%s'", s->name);
149 return ERROR_FAIL;
150 }
151 switch (value) {
152 case '0':
153 data = s->invert_data;
154 oe = !s->invert_oe;
155 break;
156 case '1':
157 if (s->data_mask == 0) {
158 LOG_ERROR("interface can't drive '%s' high", s->name);
159 return ERROR_FAIL;
160 }
161 data = !s->invert_data;
162 oe = !s->invert_oe;
163 break;
164 case 'z':
165 case 'Z':
166 if (s->oe_mask == 0) {
167 LOG_ERROR("interface can't tri-state '%s'", s->name);
168 return ERROR_FAIL;
169 }
170 data = s->invert_data;
171 oe = s->invert_oe;
172 break;
173 default:
174 assert(0 && "invalid signal level specifier");
175 return ERROR_FAIL;
176 }
177
178 output = data ? output | s->data_mask : output & ~s->data_mask;
179 if (s->oe_mask == s->data_mask)
180 direction = oe ? direction | s->oe_mask : direction & ~s->oe_mask;
181 else
182 output = oe ? output | s->oe_mask : output & ~s->oe_mask;
183
184 retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
185 if (retval == ERROR_OK)
186 retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
187 if (retval != ERROR_OK) {
188 LOG_ERROR("couldn't initialize FTDI GPIO");
189 return ERROR_JTAG_INIT_FAILED;
190 }
191
192 return ERROR_OK;
193 }
194
195
196 /**
197 * Function move_to_state
198 * moves the TAP controller from the current state to a
199 * \a goal_state through a path given by tap_get_tms_path(). State transition
200 * logging is performed by delegation to clock_tms().
201 *
202 * @param goal_state is the destination state for the move.
203 */
204 static int move_to_state(tap_state_t goal_state)
205 {
206 tap_state_t start_state = tap_get_state();
207
208 /* goal_state is 1/2 of a tuple/pair of states which allow convenient
209 lookup of the required TMS pattern to move to this state from the
210 start state.
211 */
212
213 /* do the 2 lookups */
214 int tms_bits = tap_get_tms_path(start_state, goal_state);
215 int tms_count = tap_get_tms_path_len(start_state, goal_state);
216
217 DEBUG_JTAG_IO("start=%s goal=%s", tap_state_name(start_state), tap_state_name(goal_state));
218
219 /* Track state transitions step by step */
220 for (int i = 0; i < tms_count; i++)
221 tap_set_state(tap_state_transition(tap_get_state(), (tms_bits >> i) & 1));
222
223 return mpsse_clock_tms_cs_out(mpsse_ctx,
224 (uint8_t *)&tms_bits,
225 0,
226 tms_count,
227 false,
228 JTAG_MODE);
229 }
230
231 static int ftdi_speed(int speed)
232 {
233 int retval;
234 retval = mpsse_set_frequency(mpsse_ctx, speed);
235
236 if (retval < 0) {
237 LOG_ERROR("couldn't set FTDI TCK speed");
238 return retval;
239 }
240
241 return ERROR_OK;
242 }
243
244 static int ftdi_speed_div(int speed, int *khz)
245 {
246 *khz = speed / 1000;
247 return ERROR_OK;
248 }
249
250 static int ftdi_khz(int khz, int *jtag_speed)
251 {
252 if (khz == 0 && !mpsse_is_high_speed(mpsse_ctx)) {
253 LOG_DEBUG("RCLK not supported");
254 return ERROR_FAIL;
255 }
256
257 *jtag_speed = khz * 1000;
258 return ERROR_OK;
259 }
260
261 static void ftdi_end_state(tap_state_t state)
262 {
263 if (tap_is_state_stable(state))
264 tap_set_end_state(state);
265 else {
266 LOG_ERROR("BUG: %s is not a stable end state", tap_state_name(state));
267 exit(-1);
268 }
269 }
270
271 static int ftdi_execute_runtest(struct jtag_command *cmd)
272 {
273 int retval = ERROR_OK;
274 int i;
275 uint8_t zero = 0;
276
277 DEBUG_JTAG_IO("runtest %i cycles, end in %s",
278 cmd->cmd.runtest->num_cycles,
279 tap_state_name(cmd->cmd.runtest->end_state));
280
281 if (tap_get_state() != TAP_IDLE)
282 move_to_state(TAP_IDLE);
283
284 /* TODO: Reuse ftdi_execute_stableclocks */
285 i = cmd->cmd.runtest->num_cycles;
286 while (i > 0 && retval == ERROR_OK) {
287 /* there are no state transitions in this code, so omit state tracking */
288 unsigned this_len = i > 7 ? 7 : i;
289 retval = mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, JTAG_MODE);
290 i -= this_len;
291 }
292
293 ftdi_end_state(cmd->cmd.runtest->end_state);
294
295 if (tap_get_state() != tap_get_end_state())
296 move_to_state(tap_get_end_state());
297
298 DEBUG_JTAG_IO("runtest: %i, end in %s",
299 cmd->cmd.runtest->num_cycles,
300 tap_state_name(tap_get_end_state()));
301 return retval;
302 }
303
304 static int ftdi_execute_statemove(struct jtag_command *cmd)
305 {
306 int retval = ERROR_OK;
307
308 DEBUG_JTAG_IO("statemove end in %s",
309 tap_state_name(cmd->cmd.statemove->end_state));
310
311 ftdi_end_state(cmd->cmd.statemove->end_state);
312
313 /* shortest-path move to desired end state */
314 if (tap_get_state() != tap_get_end_state() || tap_get_end_state() == TAP_RESET)
315 move_to_state(tap_get_end_state());
316
317 return retval;
318 }
319
320 /**
321 * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
322 * (or SWD) state machine. REVISIT: Not the best method, perhaps.
323 */
324 static int ftdi_execute_tms(struct jtag_command *cmd)
325 {
326 DEBUG_JTAG_IO("TMS: %d bits", cmd->cmd.tms->num_bits);
327
328 /* TODO: Missing tap state tracking, also missing from ft2232.c! */
329 return mpsse_clock_tms_cs_out(mpsse_ctx,
330 cmd->cmd.tms->bits,
331 0,
332 cmd->cmd.tms->num_bits,
333 false,
334 JTAG_MODE);
335 }
336
337 static int ftdi_execute_pathmove(struct jtag_command *cmd)
338 {
339 int retval = ERROR_OK;
340
341 tap_state_t *path = cmd->cmd.pathmove->path;
342 int num_states = cmd->cmd.pathmove->num_states;
343
344 DEBUG_JTAG_IO("pathmove: %i states, current: %s end: %s", num_states,
345 tap_state_name(tap_get_state()),
346 tap_state_name(path[num_states-1]));
347
348 int state_count = 0;
349 unsigned bit_count = 0;
350 uint8_t tms_byte = 0;
351
352 DEBUG_JTAG_IO("-");
353
354 /* this loop verifies that the path is legal and logs each state in the path */
355 while (num_states-- && retval == ERROR_OK) {
356
357 /* either TMS=0 or TMS=1 must work ... */
358 if (tap_state_transition(tap_get_state(), false)
359 == path[state_count])
360 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
361 else if (tap_state_transition(tap_get_state(), true)
362 == path[state_count]) {
363 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
364
365 /* ... or else the caller goofed BADLY */
366 } else {
367 LOG_ERROR("BUG: %s -> %s isn't a valid "
368 "TAP state transition",
369 tap_state_name(tap_get_state()),
370 tap_state_name(path[state_count]));
371 exit(-1);
372 }
373
374 tap_set_state(path[state_count]);
375 state_count++;
376
377 if (bit_count == 7 || num_states == 0) {
378 retval = mpsse_clock_tms_cs_out(mpsse_ctx,
379 &tms_byte,
380 0,
381 bit_count,
382 false,
383 JTAG_MODE);
384 bit_count = 0;
385 }
386 }
387 tap_set_end_state(tap_get_state());
388
389 return retval;
390 }
391
392 static int ftdi_execute_scan(struct jtag_command *cmd)
393 {
394 int retval = ERROR_OK;
395
396 DEBUG_JTAG_IO("%s type:%d", cmd->cmd.scan->ir_scan ? "IRSCAN" : "DRSCAN",
397 jtag_scan_type(cmd->cmd.scan));
398
399 /* Make sure there are no trailing fields with num_bits == 0, or the logic below will fail. */
400 while (cmd->cmd.scan->num_fields > 0
401 && cmd->cmd.scan->fields[cmd->cmd.scan->num_fields - 1].num_bits == 0) {
402 cmd->cmd.scan->num_fields--;
403 LOG_DEBUG("discarding trailing empty field");
404 }
405
406 if (cmd->cmd.scan->num_fields == 0) {
407 LOG_DEBUG("empty scan, doing nothing");
408 return retval;
409 }
410
411 if (cmd->cmd.scan->ir_scan) {
412 if (tap_get_state() != TAP_IRSHIFT)
413 move_to_state(TAP_IRSHIFT);
414 } else {
415 if (tap_get_state() != TAP_DRSHIFT)
416 move_to_state(TAP_DRSHIFT);
417 }
418
419 ftdi_end_state(cmd->cmd.scan->end_state);
420
421 struct scan_field *field = cmd->cmd.scan->fields;
422 unsigned scan_size = 0;
423
424 for (int i = 0; i < cmd->cmd.scan->num_fields; i++, field++) {
425 scan_size += field->num_bits;
426 DEBUG_JTAG_IO("%s%s field %d/%d %d bits",
427 field->in_value ? "in" : "",
428 field->out_value ? "out" : "",
429 i,
430 cmd->cmd.scan->num_fields,
431 field->num_bits);
432
433 if (i == cmd->cmd.scan->num_fields - 1 && tap_get_state() != tap_get_end_state()) {
434 /* Last field, and we're leaving IRSHIFT/DRSHIFT. Clock last bit during tap
435 * movement. This last field can't have length zero, it was checked above. */
436 mpsse_clock_data(mpsse_ctx,
437 field->out_value,
438 0,
439 field->in_value,
440 0,
441 field->num_bits - 1,
442 JTAG_MODE);
443 uint8_t last_bit = 0;
444 if (field->out_value)
445 bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1);
446 uint8_t tms_bits = 0x01;
447 retval = mpsse_clock_tms_cs(mpsse_ctx,
448 &tms_bits,
449 0,
450 field->in_value,
451 field->num_bits - 1,
452 1,
453 last_bit,
454 JTAG_MODE);
455 tap_set_state(tap_state_transition(tap_get_state(), 1));
456 retval = mpsse_clock_tms_cs_out(mpsse_ctx,
457 &tms_bits,
458 1,
459 1,
460 last_bit,
461 JTAG_MODE);
462 tap_set_state(tap_state_transition(tap_get_state(), 0));
463 } else
464 mpsse_clock_data(mpsse_ctx,
465 field->out_value,
466 0,
467 field->in_value,
468 0,
469 field->num_bits,
470 JTAG_MODE);
471 if (retval != ERROR_OK) {
472 LOG_ERROR("failed to add field %d in scan", i);
473 return retval;
474 }
475 }
476
477 if (tap_get_state() != tap_get_end_state())
478 move_to_state(tap_get_end_state());
479
480 DEBUG_JTAG_IO("%s scan, %i bits, end in %s",
481 (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
482 tap_state_name(tap_get_end_state()));
483 return retval;
484
485 }
486
487 static int ftdi_execute_reset(struct jtag_command *cmd)
488 {
489 DEBUG_JTAG_IO("reset trst: %i srst %i",
490 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
491
492 if (cmd->cmd.reset->trst == 1
493 || (cmd->cmd.reset->srst
494 && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
495 tap_set_state(TAP_RESET);
496
497 struct signal *trst = find_signal_by_name("nTRST");
498 if (trst && cmd->cmd.reset->trst == 1) {
499 ftdi_set_signal(trst, '0');
500 } else if (trst && cmd->cmd.reset->trst == 0) {
501 if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
502 ftdi_set_signal(trst, 'z');
503 else
504 ftdi_set_signal(trst, '1');
505 }
506
507 struct signal *srst = find_signal_by_name("nSRST");
508 if (srst && cmd->cmd.reset->srst == 1) {
509 ftdi_set_signal(srst, '0');
510 } else if (srst && cmd->cmd.reset->srst == 0) {
511 if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
512 ftdi_set_signal(srst, '1');
513 else
514 ftdi_set_signal(srst, 'z');
515 }
516
517 DEBUG_JTAG_IO("trst: %i, srst: %i",
518 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
519 return ERROR_OK;
520 }
521
522 static int ftdi_execute_sleep(struct jtag_command *cmd)
523 {
524 int retval = ERROR_OK;
525
526 DEBUG_JTAG_IO("sleep %" PRIi32, cmd->cmd.sleep->us);
527
528 retval = mpsse_flush(mpsse_ctx);
529 jtag_sleep(cmd->cmd.sleep->us);
530 DEBUG_JTAG_IO("sleep %" PRIi32 " usec while in %s",
531 cmd->cmd.sleep->us,
532 tap_state_name(tap_get_state()));
533 return retval;
534 }
535
536 static int ftdi_execute_stableclocks(struct jtag_command *cmd)
537 {
538 int retval = ERROR_OK;
539
540 /* this is only allowed while in a stable state. A check for a stable
541 * state was done in jtag_add_clocks()
542 */
543 int num_cycles = cmd->cmd.stableclocks->num_cycles;
544
545 /* 7 bits of either ones or zeros. */
546 uint8_t tms = tap_get_state() == TAP_RESET ? 0x7f : 0x00;
547
548 /* TODO: Use mpsse_clock_data with in=out=0 for this, if TMS can be set to
549 * the correct level and remain there during the scan */
550 while (num_cycles > 0 && retval == ERROR_OK) {
551 /* there are no state transitions in this code, so omit state tracking */
552 unsigned this_len = num_cycles > 7 ? 7 : num_cycles;
553 retval = mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, JTAG_MODE);
554 num_cycles -= this_len;
555 }
556
557 DEBUG_JTAG_IO("clocks %i while in %s",
558 cmd->cmd.stableclocks->num_cycles,
559 tap_state_name(tap_get_state()));
560 return retval;
561 }
562
563 static int ftdi_execute_command(struct jtag_command *cmd)
564 {
565 int retval;
566
567 switch (cmd->type) {
568 case JTAG_RESET:
569 retval = ftdi_execute_reset(cmd);
570 break;
571 case JTAG_RUNTEST:
572 retval = ftdi_execute_runtest(cmd);
573 break;
574 case JTAG_TLR_RESET:
575 retval = ftdi_execute_statemove(cmd);
576 break;
577 case JTAG_PATHMOVE:
578 retval = ftdi_execute_pathmove(cmd);
579 break;
580 case JTAG_SCAN:
581 retval = ftdi_execute_scan(cmd);
582 break;
583 case JTAG_SLEEP:
584 retval = ftdi_execute_sleep(cmd);
585 break;
586 case JTAG_STABLECLOCKS:
587 retval = ftdi_execute_stableclocks(cmd);
588 break;
589 case JTAG_TMS:
590 retval = ftdi_execute_tms(cmd);
591 break;
592 default:
593 LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
594 retval = ERROR_JTAG_QUEUE_FAILED;
595 break;
596 }
597 return retval;
598 }
599
600 static int ftdi_execute_queue(void)
601 {
602 int retval = ERROR_OK;
603
604 /* blink, if the current layout has that feature */
605 struct signal *led = find_signal_by_name("LED");
606 if (led)
607 ftdi_set_signal(led, '1');
608
609 for (struct jtag_command *cmd = jtag_command_queue; cmd; cmd = cmd->next) {
610 /* fill the write buffer with the desired command */
611 if (ftdi_execute_command(cmd) != ERROR_OK)
612 retval = ERROR_JTAG_QUEUE_FAILED;
613 }
614
615 if (led)
616 ftdi_set_signal(led, '0');
617
618 retval = mpsse_flush(mpsse_ctx);
619 if (retval != ERROR_OK)
620 LOG_ERROR("error while flushing MPSSE queue: %d", retval);
621
622 return retval;
623 }
624
625 static int ftdi_initialize(void)
626 {
627 int retval;
628
629 if (tap_get_tms_path_len(TAP_IRPAUSE, TAP_IRPAUSE) == 7)
630 LOG_DEBUG("ftdi interface using 7 step jtag state transitions");
631 else
632 LOG_DEBUG("ftdi interface using shortest path jtag state transitions");
633
634 for (int i = 0; ftdi_vid[i] || ftdi_pid[i]; i++) {
635 mpsse_ctx = mpsse_open(&ftdi_vid[i], &ftdi_pid[i], ftdi_device_desc,
636 ftdi_serial, ftdi_channel);
637 if (mpsse_ctx)
638 break;
639 }
640
641 if (!mpsse_ctx)
642 return ERROR_JTAG_INIT_FAILED;
643
644 retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
645 if (retval == ERROR_OK)
646 retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
647 if (retval != ERROR_OK) {
648 LOG_ERROR("couldn't initialize FTDI with configured layout");
649 return ERROR_JTAG_INIT_FAILED;
650 }
651
652 retval = mpsse_loopback_config(mpsse_ctx, false);
653 if (retval != ERROR_OK) {
654 LOG_ERROR("couldn't write to FTDI to disable loopback");
655 return ERROR_JTAG_INIT_FAILED;
656 }
657
658 return mpsse_flush(mpsse_ctx);
659 }
660
661 static int ftdi_quit(void)
662 {
663 mpsse_close(mpsse_ctx);
664
665 return ERROR_OK;
666 }
667
668 COMMAND_HANDLER(ftdi_handle_device_desc_command)
669 {
670 if (CMD_ARGC == 1) {
671 if (ftdi_device_desc)
672 free(ftdi_device_desc);
673 ftdi_device_desc = strdup(CMD_ARGV[0]);
674 } else {
675 LOG_ERROR("expected exactly one argument to ftdi_device_desc <description>");
676 }
677
678 return ERROR_OK;
679 }
680
681 COMMAND_HANDLER(ftdi_handle_serial_command)
682 {
683 if (CMD_ARGC == 1) {
684 if (ftdi_serial)
685 free(ftdi_serial);
686 ftdi_serial = strdup(CMD_ARGV[0]);
687 } else {
688 return ERROR_COMMAND_SYNTAX_ERROR;
689 }
690
691 return ERROR_OK;
692 }
693
694 COMMAND_HANDLER(ftdi_handle_channel_command)
695 {
696 if (CMD_ARGC == 1)
697 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], ftdi_channel);
698 else
699 return ERROR_COMMAND_SYNTAX_ERROR;
700
701 return ERROR_OK;
702 }
703
704 COMMAND_HANDLER(ftdi_handle_layout_init_command)
705 {
706 if (CMD_ARGC != 2)
707 return ERROR_COMMAND_SYNTAX_ERROR;
708
709 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], output);
710 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], direction);
711
712 return ERROR_OK;
713 }
714
715 COMMAND_HANDLER(ftdi_handle_layout_signal_command)
716 {
717 if (CMD_ARGC < 1)
718 return ERROR_COMMAND_SYNTAX_ERROR;
719
720 bool invert_data = false;
721 uint16_t data_mask = 0;
722 bool invert_oe = false;
723 uint16_t oe_mask = 0;
724 for (unsigned i = 1; i < CMD_ARGC; i += 2) {
725 if (strcmp("-data", CMD_ARGV[i]) == 0) {
726 invert_data = false;
727 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
728 } else if (strcmp("-ndata", CMD_ARGV[i]) == 0) {
729 invert_data = true;
730 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
731 } else if (strcmp("-oe", CMD_ARGV[i]) == 0) {
732 invert_oe = false;
733 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
734 } else if (strcmp("-noe", CMD_ARGV[i]) == 0) {
735 invert_oe = true;
736 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
737 } else {
738 LOG_ERROR("unknown option '%s'", CMD_ARGV[i]);
739 return ERROR_COMMAND_SYNTAX_ERROR;
740 }
741 }
742
743 struct signal *sig;
744 sig = find_signal_by_name(CMD_ARGV[0]);
745 if (!sig)
746 sig = create_signal(CMD_ARGV[0]);
747 if (!sig) {
748 LOG_ERROR("failed to create signal %s", CMD_ARGV[0]);
749 return ERROR_FAIL;
750 }
751
752 sig->invert_data = invert_data;
753 sig->data_mask = data_mask;
754 sig->invert_oe = invert_oe;
755 sig->oe_mask = oe_mask;
756
757 return ERROR_OK;
758 }
759
760 COMMAND_HANDLER(ftdi_handle_set_signal_command)
761 {
762 if (CMD_ARGC < 2)
763 return ERROR_COMMAND_SYNTAX_ERROR;
764
765 struct signal *sig;
766 sig = find_signal_by_name(CMD_ARGV[0]);
767 if (!sig) {
768 LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
769 return ERROR_FAIL;
770 }
771
772 switch (*CMD_ARGV[1]) {
773 case '0':
774 case '1':
775 case 'z':
776 case 'Z':
777 /* single character level specifier only */
778 if (CMD_ARGV[1][1] == '\0') {
779 ftdi_set_signal(sig, *CMD_ARGV[1]);
780 break;
781 }
782 default:
783 LOG_ERROR("unknown signal level '%s', use 0, 1 or z", CMD_ARGV[1]);
784 return ERROR_COMMAND_SYNTAX_ERROR;
785 }
786
787 return mpsse_flush(mpsse_ctx);
788 }
789
790 COMMAND_HANDLER(ftdi_handle_vid_pid_command)
791 {
792 if (CMD_ARGC > MAX_USB_IDS * 2) {
793 LOG_WARNING("ignoring extra IDs in ftdi_vid_pid "
794 "(maximum is %d pairs)", MAX_USB_IDS);
795 CMD_ARGC = MAX_USB_IDS * 2;
796 }
797 if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
798 LOG_WARNING("incomplete ftdi_vid_pid configuration directive");
799 if (CMD_ARGC < 2)
800 return ERROR_COMMAND_SYNTAX_ERROR;
801 /* remove the incomplete trailing id */
802 CMD_ARGC -= 1;
803 }
804
805 unsigned i;
806 for (i = 0; i < CMD_ARGC; i += 2) {
807 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], ftdi_vid[i >> 1]);
808 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], ftdi_pid[i >> 1]);
809 }
810
811 /*
812 * Explicitly terminate, in case there are multiples instances of
813 * ftdi_vid_pid.
814 */
815 ftdi_vid[i >> 1] = ftdi_pid[i >> 1] = 0;
816
817 return ERROR_OK;
818 }
819
820 static const struct command_registration ftdi_command_handlers[] = {
821 {
822 .name = "ftdi_device_desc",
823 .handler = &ftdi_handle_device_desc_command,
824 .mode = COMMAND_CONFIG,
825 .help = "set the USB device description of the FTDI device",
826 .usage = "description_string",
827 },
828 {
829 .name = "ftdi_serial",
830 .handler = &ftdi_handle_serial_command,
831 .mode = COMMAND_CONFIG,
832 .help = "set the serial number of the FTDI device",
833 .usage = "serial_string",
834 },
835 {
836 .name = "ftdi_channel",
837 .handler = &ftdi_handle_channel_command,
838 .mode = COMMAND_CONFIG,
839 .help = "set the channel of the FTDI device that is used as JTAG",
840 .usage = "(0-3)",
841 },
842 {
843 .name = "ftdi_layout_init",
844 .handler = &ftdi_handle_layout_init_command,
845 .mode = COMMAND_CONFIG,
846 .help = "initialize the FTDI GPIO signals used "
847 "to control output-enables and reset signals",
848 .usage = "data direction",
849 },
850 {
851 .name = "ftdi_layout_signal",
852 .handler = &ftdi_handle_layout_signal_command,
853 .mode = COMMAND_ANY,
854 .help = "define a signal controlled by one or more FTDI GPIO as data "
855 "and/or output enable",
856 .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask]",
857 },
858 {
859 .name = "ftdi_set_signal",
860 .handler = &ftdi_handle_set_signal_command,
861 .mode = COMMAND_EXEC,
862 .help = "control a layout-specific signal",
863 .usage = "name (1|0|z)",
864 },
865 {
866 .name = "ftdi_vid_pid",
867 .handler = &ftdi_handle_vid_pid_command,
868 .mode = COMMAND_CONFIG,
869 .help = "the vendor ID and product ID of the FTDI device",
870 .usage = "(vid pid)* ",
871 },
872 COMMAND_REGISTRATION_DONE
873 };
874
875 struct jtag_interface ftdi_interface = {
876 .name = "ftdi",
877 .supported = DEBUG_CAP_TMS_SEQ,
878 .commands = ftdi_command_handlers,
879 .transports = jtag_only,
880
881 .init = ftdi_initialize,
882 .quit = ftdi_quit,
883 .speed = ftdi_speed,
884 .speed_div = ftdi_speed_div,
885 .khz = ftdi_khz,
886 .execute_queue = ftdi_execute_queue,
887 };
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