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jtag/drivers/ftdi: declare standard JTAG signals on SWD init
[openocd.git] / src / jtag / drivers / presto.c
blob45e434a14d17540f25cba1b670b9fe35c7faa7cb
1 /***************************************************************************
2 * Copyright (C) 2007 by Pavel Chromy *
3 * chromy@asix.cz *
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 * Holds driver for PRESTO programmer from ASIX.
24 * http://tools.asix.net/prg_presto.htm
25 */
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #if IS_CYGWIN == 1
31 #include "windows.h"
32 #endif
33
34 #include <jtag/interface.h>
35 #include <helper/time_support.h>
36 #include "bitq.h"
37
38 /* PRESTO access library includes */
39 #if BUILD_PRESTO_FTD2XX == 1
40 #include <ftd2xx.h>
41 #include "ftd2xx_common.h"
42 #elif BUILD_PRESTO_LIBFTDI == 1
43 #include <ftdi.h>
44 #else
45 #error "BUG: either FTD2XX and LIBFTDI has to be used"
46 #endif
47
48 /* -------------------------------------------------------------------------- */
49
50 #define FT_DEVICE_NAME_LEN 64
51 #define FT_DEVICE_SERNUM_LEN 64
52
53 #define PRESTO_VID_PID 0x0403f1a0
54 #define PRESTO_VID (0x0403)
55 #define PRESTO_PID (0xf1a0)
56
57 #define BUFFER_SIZE (64*62)
58
59 struct presto {
60 #if BUILD_PRESTO_FTD2XX == 1
61 FT_HANDLE handle;
62 FT_STATUS status;
63 #elif BUILD_PRESTO_LIBFTDI == 1
64 struct ftdi_context ftdic;
65 int retval;
66 #endif
67
68 char serial[FT_DEVICE_SERNUM_LEN];
69
70 uint8_t buff_out[BUFFER_SIZE];
71 int buff_out_pos;
72
73 uint8_t buff_in[BUFFER_SIZE];
74 int buff_in_exp;/* expected in buffer length */
75 int buff_in_len;/* length of data received */
76 int buff_in_pos;
77
78 unsigned long total_out;
79 unsigned long total_in;
80
81 int jtag_tms; /* last tms state */
82 int jtag_tck; /* last tck state */
83 int jtag_rst; /* last trst state */
84
85 int jtag_tdi_data;
86 int jtag_tdi_count;
87
88 int jtag_speed;
89 };
90
91 static struct presto presto_state;
92 static struct presto *presto = &presto_state;
93
94 static uint8_t presto_init_seq[] = {
95 0x80, 0xA0, 0xA8, 0xB0, 0xC0, 0xE0
96 };
97
98 static int presto_write(uint8_t *buf, uint32_t size)
99 {
100 #if BUILD_PRESTO_FTD2XX == 1
101 DWORD ftbytes;
102 presto->status = FT_Write(presto->handle, buf, size, &ftbytes);
103 if (presto->status != FT_OK) {
104 LOG_ERROR("FT_Write returned: %s", ftd2xx_status_string(presto->status));
105 return ERROR_JTAG_DEVICE_ERROR;
106 }
107
108 #elif BUILD_PRESTO_LIBFTDI == 1
109 uint32_t ftbytes;
110 presto->retval = ftdi_write_data(&presto->ftdic, buf, size);
111 if (presto->retval < 0) {
112 LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&presto->ftdic));
113 return ERROR_JTAG_DEVICE_ERROR;
114 }
115 ftbytes = presto->retval;
116 #endif
117
118 if (ftbytes != size) {
119 LOG_ERROR("couldn't write the requested number of bytes to PRESTO (%u < %u)",
120 (unsigned)ftbytes, (unsigned)size);
121 return ERROR_JTAG_DEVICE_ERROR;
122 }
123
124 return ERROR_OK;
125 }
126
127 static int presto_read(uint8_t *buf, uint32_t size)
128 {
129 #if BUILD_PRESTO_FTD2XX == 1
130 DWORD ftbytes;
131 presto->status = FT_Read(presto->handle, buf, size, &ftbytes);
132 if (presto->status != FT_OK) {
133 LOG_ERROR("FT_Read returned: %s", ftd2xx_status_string(presto->status));
134 return ERROR_JTAG_DEVICE_ERROR;
135 }
136
137 #elif BUILD_PRESTO_LIBFTDI == 1
138 uint32_t ftbytes = 0;
139
140 struct timeval timeout, now;
141 gettimeofday(&timeout, NULL);
142 timeval_add_time(&timeout, 1, 0); /* one second timeout */
143
144 while (ftbytes < size) {
145 presto->retval = ftdi_read_data(&presto->ftdic, buf + ftbytes, size - ftbytes);
146 if (presto->retval < 0) {
147 LOG_ERROR("ftdi_read_data: %s", ftdi_get_error_string(&presto->ftdic));
148 return ERROR_JTAG_DEVICE_ERROR;
149 }
150 ftbytes += presto->retval;
151
152 gettimeofday(&now, NULL);
153 if ((now.tv_sec > timeout.tv_sec) ||
154 ((now.tv_sec == timeout.tv_sec) && (now.tv_usec > timeout.tv_usec)))
155 break;
156 }
157 #endif
158
159 if (ftbytes != size) {
160 /* this is just a warning, there might have been timeout when detecting PRESTO,
161 *which is not fatal */
162 LOG_WARNING("couldn't read the requested number of bytes from PRESTO (%u < %u)",
163 (unsigned)ftbytes, (unsigned)size);
164 return ERROR_JTAG_DEVICE_ERROR;
165 }
166
167 return ERROR_OK;
168 }
169
170 #if BUILD_PRESTO_FTD2XX == 1
171 static int presto_open_ftd2xx(char *req_serial)
172 {
173 uint32_t i;
174 DWORD numdevs;
175 DWORD vidpid;
176 char devname[FT_DEVICE_NAME_LEN];
177 FT_DEVICE device;
178
179 BYTE presto_data;
180 DWORD ftbytes;
181
182 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
183
184 #if IS_WIN32 == 0
185 /* Add non-standard Vid/Pid to the linux driver */
186 presto->status = FT_SetVIDPID(PRESTO_VID, PRESTO_PID);
187 if (presto->status != FT_OK) {
188 LOG_ERROR("couldn't add PRESTO VID/PID");
189 exit(-1);
190 }
191 #endif
192
193 presto->status = FT_ListDevices(&numdevs, NULL, FT_LIST_NUMBER_ONLY);
194 if (presto->status != FT_OK) {
195 LOG_ERROR("FT_ListDevices failed: %s", ftd2xx_status_string(presto->status));
196 return ERROR_JTAG_DEVICE_ERROR;
197 }
198
199 LOG_DEBUG("FTDI devices available: %" PRIu32, (uint32_t)numdevs);
200 for (i = 0; i < numdevs; i++) {
201 presto->status = FT_Open(i, &(presto->handle));
202 if (presto->status != FT_OK) {
203 /* this is not fatal, the device may be legitimately open by other process,
204 *hence debug message only */
205 LOG_DEBUG("FT_Open failed: %s", ftd2xx_status_string(presto->status));
206 continue;
207 }
208 LOG_DEBUG("FTDI device %i open", (int)i);
209
210 presto->status = FT_GetDeviceInfo(presto->handle, &device,
211 &vidpid, presto->serial, devname, NULL);
212 if (presto->status == FT_OK) {
213 if (vidpid == PRESTO_VID_PID && (req_serial == NULL ||
214 !strcmp(presto->serial, req_serial)))
215 break;
216 } else
217 LOG_DEBUG("FT_GetDeviceInfo failed: %s", ftd2xx_status_string(
218 presto->status));
219
220 LOG_DEBUG("FTDI device %i does not match, closing", (int)i);
221 FT_Close(presto->handle);
222 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
223 }
224
225 if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE)
226 return ERROR_JTAG_DEVICE_ERROR; /* presto not open, return */
227
228 presto->status = FT_SetLatencyTimer(presto->handle, 1);
229 if (presto->status != FT_OK)
230 return ERROR_JTAG_DEVICE_ERROR;
231
232 presto->status = FT_SetTimeouts(presto->handle, 100, 0);
233 if (presto->status != FT_OK)
234 return ERROR_JTAG_DEVICE_ERROR;
235
236 presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX);
237 if (presto->status != FT_OK)
238 return ERROR_JTAG_DEVICE_ERROR;
239
240 presto_data = 0xD0;
241 presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes);
242 if (presto->status != FT_OK)
243 return ERROR_JTAG_DEVICE_ERROR;
244
245 /* delay between first write/read turnaround (after purge?) necessary
246 * under Linux for unknown reason,
247 * probably a bug in library threading */
248 usleep(100000);
249 presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes);
250 if (presto->status != FT_OK)
251 return ERROR_JTAG_DEVICE_ERROR;
252
253 if (ftbytes != 1) {
254 LOG_DEBUG("PRESTO reset");
255
256 presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX);
257 if (presto->status != FT_OK)
258 return ERROR_JTAG_DEVICE_ERROR;
259 presto->status = FT_SetBitMode(presto->handle, 0x80, 1);
260 if (presto->status != FT_OK)
261 return ERROR_JTAG_DEVICE_ERROR;
262 presto->status = FT_SetBaudRate(presto->handle, 9600);
263 if (presto->status != FT_OK)
264 return ERROR_JTAG_DEVICE_ERROR;
265
266 presto_data = 0;
267 for (i = 0; i < 4 * 62; i++) {
268 presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes);
269 if (presto->status != FT_OK)
270 return ERROR_JTAG_DEVICE_ERROR;
271 }
272 usleep(100000);
273
274 presto->status = FT_SetBitMode(presto->handle, 0x00, 0);
275 if (presto->status != FT_OK)
276 return ERROR_JTAG_DEVICE_ERROR;
277
278 presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX);
279 if (presto->status != FT_OK)
280 return ERROR_JTAG_DEVICE_ERROR;
281
282 presto_data = 0xD0;
283 presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes);
284 if (presto->status != FT_OK)
285 return ERROR_JTAG_DEVICE_ERROR;
286
287 /* delay between first write/read turnaround (after purge?) necessary under Linux for unknown reason,
288 probably a bug in library threading */
289 usleep(100000);
290 presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes);
291 if (presto->status != FT_OK)
292 return ERROR_JTAG_DEVICE_ERROR;
293
294 if (ftbytes != 1) {
295 LOG_DEBUG("PRESTO not responding");
296 return ERROR_JTAG_DEVICE_ERROR;
297 }
298 }
299
300 presto->status = FT_SetTimeouts(presto->handle, 0, 0);
301 if (presto->status != FT_OK)
302 return ERROR_JTAG_DEVICE_ERROR;
303
304 presto->status = FT_Write(presto->handle, &presto_init_seq,
305 sizeof(presto_init_seq), &ftbytes);
306
307 if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq))
308 return ERROR_JTAG_DEVICE_ERROR;
309
310 return ERROR_OK;
311 }
312
313 #elif BUILD_PRESTO_LIBFTDI == 1
314 static int presto_open_libftdi(char *req_serial)
315 {
316 uint8_t presto_data;
317
318 LOG_DEBUG("searching for PRESTO using libftdi");
319
320 /* initialize FTDI context structure */
321 if (ftdi_init(&presto->ftdic) < 0) {
322 LOG_ERROR("unable to init libftdi: %s", presto->ftdic.error_str);
323 return ERROR_JTAG_DEVICE_ERROR;
324 }
325
326 /* context, vendor id, product id */
327 if (ftdi_usb_open_desc(&presto->ftdic, PRESTO_VID, PRESTO_PID, NULL, req_serial) < 0) {
328 LOG_ERROR("unable to open PRESTO: %s", presto->ftdic.error_str);
329 return ERROR_JTAG_DEVICE_ERROR;
330 }
331
332 if (ftdi_usb_reset(&presto->ftdic) < 0) {
333 LOG_ERROR("unable to reset PRESTO device");
334 return ERROR_JTAG_DEVICE_ERROR;
335 }
336
337 if (ftdi_set_latency_timer(&presto->ftdic, 1) < 0) {
338 LOG_ERROR("unable to set latency timer");
339 return ERROR_JTAG_DEVICE_ERROR;
340 }
341
342 if (ftdi_usb_purge_buffers(&presto->ftdic) < 0) {
343 LOG_ERROR("unable to purge PRESTO buffers");
344 return ERROR_JTAG_DEVICE_ERROR;
345 }
346
347 presto_data = 0xD0;
348 if (presto_write(&presto_data, 1) != ERROR_OK) {
349 LOG_ERROR("error writing to PRESTO");
350 return ERROR_JTAG_DEVICE_ERROR;
351 }
352
353 if (presto_read(&presto_data, 1) != ERROR_OK) {
354 LOG_DEBUG("no response from PRESTO, retrying");
355
356 if (ftdi_usb_purge_buffers(&presto->ftdic) < 0)
357 return ERROR_JTAG_DEVICE_ERROR;
358
359 presto_data = 0xD0;
360 if (presto_write(&presto_data, 1) != ERROR_OK)
361 return ERROR_JTAG_DEVICE_ERROR;
362
363 if (presto_read(&presto_data, 1) != ERROR_OK) {
364 LOG_ERROR("no response from PRESTO, giving up");
365 return ERROR_JTAG_DEVICE_ERROR;
366 }
367 }
368
369 if (presto_write(presto_init_seq, sizeof(presto_init_seq)) != ERROR_OK) {
370 LOG_ERROR("error writing PRESTO init sequence");
371 return ERROR_JTAG_DEVICE_ERROR;
372 }
373
374 return ERROR_OK;
375 }
376 #endif /* BUILD_PRESTO_LIBFTDI == 1 */
377
378 static int presto_open(char *req_serial)
379 {
380 presto->buff_out_pos = 0;
381 presto->buff_in_pos = 0;
382 presto->buff_in_len = 0;
383 presto->buff_in_exp = 0;
384
385 presto->total_out = 0;
386 presto->total_in = 0;
387
388 presto->jtag_tms = 0;
389 presto->jtag_tck = 0;
390 presto->jtag_rst = 0;
391 presto->jtag_tdi_data = 0;
392 presto->jtag_tdi_count = 0;
393
394 presto->jtag_speed = 0;
395
396 #if BUILD_PRESTO_FTD2XX == 1
397 return presto_open_ftd2xx(req_serial);
398 #elif BUILD_PRESTO_LIBFTDI == 1
399 return presto_open_libftdi(req_serial);
400 #endif
401 }
402
403 static int presto_close(void)
404 {
405
406 int result = ERROR_OK;
407
408 #if BUILD_PRESTO_FTD2XX == 1
409 DWORD ftbytes;
410
411 if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE)
412 return result;
413
414 presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX);
415 if (presto->status != FT_OK)
416 result = ERROR_JTAG_DEVICE_ERROR;
417
418 presto->status = FT_Write(presto->handle,
419 &presto_init_seq,
420 sizeof(presto_init_seq),
421 &ftbytes);
422 if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq))
423 result = ERROR_JTAG_DEVICE_ERROR;
424
425 presto->status = FT_SetLatencyTimer(presto->handle, 16);
426 if (presto->status != FT_OK)
427 result = ERROR_JTAG_DEVICE_ERROR;
428
429 presto->status = FT_Close(presto->handle);
430 if (presto->status != FT_OK)
431 result = ERROR_JTAG_DEVICE_ERROR;
432 else
433 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
434
435 #elif BUILD_PRESTO_LIBFTDI == 1
436
437 presto->retval = ftdi_write_data(&presto->ftdic, presto_init_seq, sizeof(presto_init_seq));
438 if (presto->retval != sizeof(presto_init_seq))
439 result = ERROR_JTAG_DEVICE_ERROR;
440
441 presto->retval = ftdi_set_latency_timer(&presto->ftdic, 16);
442 if (presto->retval < 0)
443 result = ERROR_JTAG_DEVICE_ERROR;
444
445 presto->retval = ftdi_usb_close(&presto->ftdic);
446 if (presto->retval < 0)
447 result = ERROR_JTAG_DEVICE_ERROR;
448 else
449 ftdi_deinit(&presto->ftdic);
450 #endif
451
452 return result;
453 }
454
455 static int presto_flush(void)
456 {
457 if (presto->buff_out_pos == 0)
458 return ERROR_OK;
459
460 #if BUILD_PRESTO_FTD2XX == 1
461 if (presto->status != FT_OK) {
462 #elif BUILD_PRESTO_LIBFTDI == 1
463 if (presto->retval < 0) {
464 #endif
465 LOG_DEBUG("error in previous communication, canceling I/O operation");
466 return ERROR_JTAG_DEVICE_ERROR;
467 }
468
469 if (presto_write(presto->buff_out, presto->buff_out_pos) != ERROR_OK) {
470 presto->buff_out_pos = 0;
471 return ERROR_JTAG_DEVICE_ERROR;
472 }
473
474 presto->total_out += presto->buff_out_pos;
475 presto->buff_out_pos = 0;
476
477 if (presto->buff_in_exp == 0)
478 return ERROR_OK;
479
480 presto->buff_in_pos = 0;
481 presto->buff_in_len = 0;
482
483 if (presto_read(presto->buff_in, presto->buff_in_exp) != ERROR_OK) {
484 presto->buff_in_exp = 0;
485 return ERROR_JTAG_DEVICE_ERROR;
486 }
487
488 presto->total_in += presto->buff_in_exp;
489 presto->buff_in_len = presto->buff_in_exp;
490 presto->buff_in_exp = 0;
491
492 return ERROR_OK;
493 }
494
495 static int presto_sendbyte(int data)
496 {
497 if (data == EOF)
498 return presto_flush();
499
500 if (presto->buff_out_pos < BUFFER_SIZE) {
501 presto->buff_out[presto->buff_out_pos++] = (uint8_t)data;
502 if (((data & 0xC0) == 0x40) || ((data & 0xD0) == 0xD0))
503 presto->buff_in_exp++;
504 } else
505 return ERROR_JTAG_DEVICE_ERROR;
506
507 #if BUILD_PRESTO_FTD2XX == 1
508 if (presto->buff_out_pos >= BUFFER_SIZE)
509 #elif BUILD_PRESTO_LIBFTDI == 1
510 /* libftdi does not do background read, be sure that USB IN buffer does not overflow (128
511 *bytes only!) */
512 if (presto->buff_out_pos >= BUFFER_SIZE || presto->buff_in_exp == 128)
513 #endif
514 return presto_flush();
515
516 return ERROR_OK;
517 }
518
519 #if 0
520 static int presto_getbyte(void)
521 {
522 if (presto->buff_in_pos < presto->buff_in_len)
523 return presto->buff_in[presto->buff_in_pos++];
524
525 if (presto->buff_in_exp == 0)
526 return -1;
527
528 if (presto_flush() != ERROR_OK)
529 return -1;
530
531 if (presto->buff_in_pos < presto->buff_in_len)
532 return presto->buff_in[presto->buff_in_pos++];
533
534 return -1;
535 }
536 #endif
537
538 /* -------------------------------------------------------------------------- */
539
540 static int presto_tdi_flush(void)
541 {
542 if (presto->jtag_tdi_count == 0)
543 return 0;
544
545 if (presto->jtag_tck == 0) {
546 LOG_ERROR("BUG: unexpected TAP condition, TCK low");
547 return -1;
548 }
549
550 presto->jtag_tdi_data |= (presto->jtag_tdi_count - 1) << 4;
551 presto_sendbyte(presto->jtag_tdi_data);
552 presto->jtag_tdi_count = 0;
553 presto->jtag_tdi_data = 0;
554
555 return 0;
556 }
557
558 static int presto_tck_idle(void)
559 {
560 if (presto->jtag_tck == 1) {
561 presto_sendbyte(0xCA);
562 presto->jtag_tck = 0;
563 }
564
565 return 0;
566 }
567
568 /* -------------------------------------------------------------------------- */
569
570 static int presto_bitq_out(int tms, int tdi, int tdo_req)
571 {
572 int i;
573 unsigned char cmd;
574
575 if (presto->jtag_tck == 0)
576 presto_sendbyte(0xA4); /* LED idicator - JTAG active */
577 else if (presto->jtag_speed == 0 && !tdo_req && tms == presto->jtag_tms) {
578 presto->jtag_tdi_data |= (tdi != 0) << presto->jtag_tdi_count;
579
580 if (++presto->jtag_tdi_count == 4)
581 presto_tdi_flush();
582
583 return 0;
584 }
585
586 presto_tdi_flush();
587
588 cmd = tdi ? 0xCB : 0xCA;
589 presto_sendbyte(cmd);
590
591 if (tms != presto->jtag_tms) {
592 presto_sendbyte((tms ? 0xEC : 0xE8) | (presto->jtag_rst ? 0x02 : 0));
593 presto->jtag_tms = tms;
594 }
595
596 /* delay with TCK low */
597 for (i = presto->jtag_speed; i > 1; i--)
598 presto_sendbyte(cmd);
599
600 cmd |= 0x04;
601 presto_sendbyte(cmd | (tdo_req ? 0x10 : 0));
602
603 /* delay with TCK high */
604 for (i = presto->jtag_speed; i > 1; i--)
605 presto_sendbyte(cmd);
606
607 presto->jtag_tck = 1;
608
609 return 0;
610 }
611
612 static int presto_bitq_flush(void)
613 {
614 presto_tdi_flush();
615 presto_tck_idle();
616
617 presto_sendbyte(0xA0); /* LED idicator - JTAG idle */
618
619 return presto_flush();
620 }
621
622 static int presto_bitq_in_rdy(void)
623 {
624 if (presto->buff_in_pos >= presto->buff_in_len)
625 return 0;
626 return presto->buff_in_len-presto->buff_in_pos;
627 }
628
629 static int presto_bitq_in(void)
630 {
631 if (presto->buff_in_pos >= presto->buff_in_len)
632 return -1;
633 if (presto->buff_in[presto->buff_in_pos++]&0x08)
634 return 1;
635 return 0;
636 }
637
638 static int presto_bitq_sleep(unsigned long us)
639 {
640 long waits;
641
642 presto_tdi_flush();
643 presto_tck_idle();
644
645 if (us > 100000) {
646 presto_bitq_flush();
647 jtag_sleep(us);
648 return 0;
649 }
650
651 waits = us / 170 + 2;
652 while (waits--)
653 presto_sendbyte(0x80);
654
655 return 0;
656 }
657
658 static int presto_bitq_reset(int trst, int srst)
659 {
660 presto_tdi_flush();
661 presto_tck_idle();
662
663 /* add a delay after possible TCK transition */
664 presto_sendbyte(0x80);
665 presto_sendbyte(0x80);
666
667 presto->jtag_rst = trst || srst;
668 presto_sendbyte((presto->jtag_rst ? 0xEA : 0xE8) | (presto->jtag_tms ? 0x04 : 0));
669
670 return 0;
671 }
672
673 static struct bitq_interface presto_bitq = {
674 .out = &presto_bitq_out,
675 .flush = &presto_bitq_flush,
676 .sleep = &presto_bitq_sleep,
677 .reset = &presto_bitq_reset,
678 .in_rdy = &presto_bitq_in_rdy,
679 .in = &presto_bitq_in,
680 };
681
682 /* -------------------------------------------------------------------------- */
683
684 static int presto_adapter_khz(int khz, int *jtag_speed)
685 {
686 if (khz < 0) {
687 *jtag_speed = 0;
688 return ERROR_COMMAND_SYNTAX_ERROR;
689 }
690
691 if (khz >= 3000)
692 *jtag_speed = 0;
693 else
694 *jtag_speed = (1000 + khz-1)/khz;
695
696 return 0;
697 }
698
699 static int presto_jtag_speed_div(int speed, int *khz)
700 {
701 if ((speed < 0) || (speed > 1000)) {
702 *khz = 0;
703 return ERROR_COMMAND_SYNTAX_ERROR;
704 }
705
706 if (speed == 0)
707 *khz = 3000;
708 else
709 *khz = 1000/speed;
710
711 return 0;
712 }
713
714 static int presto_jtag_speed(int speed)
715 {
716 int khz;
717
718 if (presto_jtag_speed_div(speed, &khz))
719 return ERROR_COMMAND_SYNTAX_ERROR;
720
721 presto->jtag_speed = speed;
722
723 if (khz%1000 == 0)
724 LOG_INFO("setting speed to %d, max. TCK freq. is %d MHz", speed, khz/1000);
725 else
726 LOG_INFO("setting speed to %d, max. TCK freq. is %d kHz", speed, khz);
727
728 return 0;
729 }
730
731 static char *presto_serial;
732
733 COMMAND_HANDLER(presto_handle_serial_command)
734 {
735 if (CMD_ARGC == 1) {
736 if (presto_serial)
737 free(presto_serial);
738 presto_serial = strdup(CMD_ARGV[0]);
739 } else
740 return ERROR_COMMAND_SYNTAX_ERROR;
741
742 return ERROR_OK;
743 }
744
745 static const struct command_registration presto_command_handlers[] = {
746 {
747 .name = "presto_serial",
748 .handler = presto_handle_serial_command,
749 .mode = COMMAND_CONFIG,
750 .help = "Configure USB serial number of Presto device.",
751 .usage = "serial_string",
752 },
753 COMMAND_REGISTRATION_DONE
754 };
755
756 static int presto_jtag_init(void)
757 {
758 if (presto_open(presto_serial) != ERROR_OK) {
759 presto_close();
760 if (presto_serial != NULL)
761 LOG_ERROR("Cannot open PRESTO, serial number '%s'", presto_serial);
762 else
763 LOG_ERROR("Cannot open PRESTO");
764 return ERROR_JTAG_INIT_FAILED;
765 }
766 LOG_INFO("PRESTO open, serial number '%s'", presto->serial);
767
768 bitq_interface = &presto_bitq;
769 return ERROR_OK;
770 }
771
772 static int presto_jtag_quit(void)
773 {
774 bitq_cleanup();
775 presto_close();
776 LOG_INFO("PRESTO closed");
777
778 if (presto_serial) {
779 free(presto_serial);
780 presto_serial = NULL;
781 }
782
783 return ERROR_OK;
784 }
785
786 struct jtag_interface presto_interface = {
787 .name = "presto",
788 .commands = presto_command_handlers,
789
790 .execute_queue = bitq_execute_queue,
791 .speed = presto_jtag_speed,
792 .khz = presto_adapter_khz,
793 .speed_div = presto_jtag_speed_div,
794 .init = presto_jtag_init,
795 .quit = presto_jtag_quit,
796 };
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