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arm-jtag-ew: -Wshadow fix
[openocd.git] / src / jtag / drivers / presto.c
blob10bed2720a4bc1fe8703faeeb72deaf23556ea68
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 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
39 /* PRESTO access library includes */
40 #if BUILD_PRESTO_FTD2XX == 1
41 #include <ftd2xx.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 {
96 0x80, 0xA0, 0xA8, 0xB0, 0xC0, 0xE0
97 };
98
99 static int presto_write(uint8_t *buf, uint32_t size)
100 {
101 #if BUILD_PRESTO_FTD2XX == 1
102 DWORD ftbytes;
103 if ((presto->status = FT_Write(presto->handle, buf, size, &ftbytes)) != FT_OK)
104 {
105 LOG_ERROR("FT_Write returned: %lu", presto->status);
106 return ERROR_JTAG_DEVICE_ERROR;
107 }
108
109 #elif BUILD_PRESTO_LIBFTDI == 1
110 uint32_t ftbytes;
111 if ((presto->retval = ftdi_write_data(&presto->ftdic, buf, size)) < 0)
112 {
113 LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&presto->ftdic));
114 return ERROR_JTAG_DEVICE_ERROR;
115 }
116 ftbytes = presto->retval;
117 #endif
118
119 if (ftbytes != size)
120 {
121 LOG_ERROR("couldn't write the requested number of bytes to PRESTO (%u < %u)",
122 (unsigned)ftbytes, (unsigned)size);
123 return ERROR_JTAG_DEVICE_ERROR;
124 }
125
126 return ERROR_OK;
127 }
128
129 static int presto_read(uint8_t* buf, uint32_t size)
130 {
131 #if BUILD_PRESTO_FTD2XX == 1
132 DWORD ftbytes;
133 if ((presto->status = FT_Read(presto->handle, buf, size, &ftbytes)) != FT_OK)
134 {
135 LOG_ERROR("FT_Read returned: %lu", presto->status);
136 return ERROR_JTAG_DEVICE_ERROR;
137 }
138
139 #elif BUILD_PRESTO_LIBFTDI == 1
140 uint32_t ftbytes = 0;
141
142 struct timeval timeout, now;
143 gettimeofday(&timeout, NULL);
144 timeval_add_time(&timeout, 1, 0); /* one second timeout */
145
146 while (ftbytes < size)
147 {
148 if ((presto->retval = ftdi_read_data(&presto->ftdic, buf + ftbytes, size - ftbytes)) < 0)
149 {
150 LOG_ERROR("ftdi_read_data: %s", ftdi_get_error_string(&presto->ftdic));
151 return ERROR_JTAG_DEVICE_ERROR;
152 }
153 ftbytes += presto->retval;
154
155 gettimeofday(&now, NULL);
156 if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec) && (now.tv_usec > timeout.tv_usec)))
157 break;
158 }
159 #endif
160
161 if (ftbytes != size)
162 {
163 /* this is just a warning, there might have been timeout when detecting PRESTO, which is not fatal */
164 LOG_WARNING("couldn't read the requested number of bytes from PRESTO (%u < %u)",
165 (unsigned)ftbytes, (unsigned)size);
166 return ERROR_JTAG_DEVICE_ERROR;
167 }
168
169 return ERROR_OK;
170 }
171
172 #if BUILD_PRESTO_FTD2XX == 1
173 static int presto_open_ftd2xx(char *req_serial)
174 {
175 uint32_t i;
176 DWORD numdevs;
177 DWORD vidpid;
178 char devname[FT_DEVICE_NAME_LEN];
179 FT_DEVICE device;
180
181 BYTE presto_data;
182 DWORD ftbytes;
183
184 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
185
186 #if IS_WIN32 == 0
187 /* Add non-standard Vid/Pid to the linux driver */
188 if ((presto->status = FT_SetVIDPID(PRESTO_VID, PRESTO_PID)) != FT_OK)
189 {
190 LOG_ERROR("couldn't add PRESTO VID/PID");
191 exit(-1);
192 }
193 #endif
194
195 if ((presto->status = FT_ListDevices(&numdevs, NULL, FT_LIST_NUMBER_ONLY)) != FT_OK)
196 {
197 LOG_ERROR("FT_ListDevices failed: %i", (int)presto->status);
198 return ERROR_JTAG_DEVICE_ERROR;
199 }
200
201 LOG_DEBUG("FTDI devices available: %lu", numdevs);
202 for (i = 0; i < numdevs; i++)
203 {
204 if ((presto->status = FT_Open(i, &(presto->handle))) != FT_OK)
205 {
206 /* this is not fatal, the device may be legitimately open by other process, hence debug message only */
207 LOG_DEBUG("FT_Open failed: %i", (int)presto->status);
208 continue;
209 }
210 LOG_DEBUG("FTDI device %i open", (int)i);
211
212 if ((presto->status = FT_GetDeviceInfo(presto->handle, &device, &vidpid,
213 presto->serial, devname, NULL)) == FT_OK)
214 {
215 if (vidpid == PRESTO_VID_PID
216 && (req_serial == NULL || !strcmp(presto->serial, req_serial)))
217 break;
218 }
219 else
220 LOG_DEBUG("FT_GetDeviceInfo failed: %lu", presto->status);
221
222 LOG_DEBUG("FTDI device %i does not match, closing", (int)i);
223 FT_Close(presto->handle);
224 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
225 }
226
227 if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE)
228 return ERROR_JTAG_DEVICE_ERROR; /* presto not open, return */
229
230 if ((presto->status = FT_SetLatencyTimer(presto->handle, 1)) != FT_OK)
231 return ERROR_JTAG_DEVICE_ERROR;
232
233
234 if ((presto->status = FT_SetTimeouts(presto->handle, 100, 0)) != FT_OK)
235 return ERROR_JTAG_DEVICE_ERROR;
236
237 if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK)
238 return ERROR_JTAG_DEVICE_ERROR;
239
240 presto_data = 0xD0;
241 if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK)
242 return ERROR_JTAG_DEVICE_ERROR;
243
244 /* delay between first write/read turnaround (after purge?) necessary under Linux for unknown reason,
245 probably a bug in library threading */
246 usleep(100000);
247 if ((presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK)
248 return ERROR_JTAG_DEVICE_ERROR;
249
250 if (ftbytes != 1)
251 {
252 LOG_DEBUG("PRESTO reset");
253
254 if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK)
255 return ERROR_JTAG_DEVICE_ERROR;
256 if ((presto->status = FT_SetBitMode(presto->handle, 0x80, 1)) != FT_OK)
257 return ERROR_JTAG_DEVICE_ERROR;
258 if ((presto->status = FT_SetBaudRate(presto->handle, 9600)) != FT_OK)
259 return ERROR_JTAG_DEVICE_ERROR;
260
261 presto_data = 0;
262 for (i = 0; i < 4 * 62; i++)
263 if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK)
264 return ERROR_JTAG_DEVICE_ERROR;
265
266 usleep(100000);
267
268 if ((presto->status = FT_SetBitMode(presto->handle, 0x00, 0)) != FT_OK)
269 return ERROR_JTAG_DEVICE_ERROR;
270
271 if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK)
272 return ERROR_JTAG_DEVICE_ERROR;
273
274 presto_data = 0xD0;
275 if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK)
276 return ERROR_JTAG_DEVICE_ERROR;
277
278 /* delay between first write/read turnaround (after purge?) necessary under Linux for unknown reason,
279 probably a bug in library threading */
280 usleep(100000);
281 if ((presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK)
282 return ERROR_JTAG_DEVICE_ERROR;
283
284 if (ftbytes != 1)
285 {
286 LOG_DEBUG("PRESTO not responding");
287 return ERROR_JTAG_DEVICE_ERROR;
288 }
289 }
290
291 if ((presto->status = FT_SetTimeouts(presto->handle, 0, 0)) != FT_OK)
292 return ERROR_JTAG_DEVICE_ERROR;
293
294
295 presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes);
296 if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq))
297 return ERROR_JTAG_DEVICE_ERROR;
298
299 return ERROR_OK;
300 }
301
302 #elif BUILD_PRESTO_LIBFTDI == 1
303 static int presto_open_libftdi(char *req_serial)
304 {
305 uint8_t presto_data;
306
307 LOG_DEBUG("searching for PRESTO using libftdi");
308
309 /* initialize FTDI context structure */
310 if (ftdi_init(&presto->ftdic) < 0)
311 {
312 LOG_ERROR("unable to init libftdi: %s", presto->ftdic.error_str);
313 return ERROR_JTAG_DEVICE_ERROR;
314 }
315
316 /* context, vendor id, product id */
317 if (ftdi_usb_open_desc(&presto->ftdic, PRESTO_VID, PRESTO_PID, NULL, req_serial) < 0)
318 {
319 LOG_ERROR("unable to open PRESTO: %s", presto->ftdic.error_str);
320 return ERROR_JTAG_DEVICE_ERROR;
321 }
322
323 if (ftdi_usb_reset(&presto->ftdic) < 0)
324 {
325 LOG_ERROR("unable to reset PRESTO device");
326 return ERROR_JTAG_DEVICE_ERROR;
327 }
328
329 if (ftdi_set_latency_timer(&presto->ftdic, 1) < 0)
330 {
331 LOG_ERROR("unable to set latency timer");
332 return ERROR_JTAG_DEVICE_ERROR;
333 }
334
335 if (ftdi_usb_purge_buffers(&presto->ftdic) < 0)
336 {
337 LOG_ERROR("unable to purge PRESTO buffers");
338 return ERROR_JTAG_DEVICE_ERROR;
339 }
340
341 presto_data = 0xD0;
342 if (presto_write(&presto_data, 1) != ERROR_OK)
343 {
344 LOG_ERROR("error writing to PRESTO");
345 return ERROR_JTAG_DEVICE_ERROR;
346 }
347
348 if (presto_read(&presto_data, 1) != ERROR_OK)
349 {
350 LOG_DEBUG("no response from PRESTO, retrying");
351
352 if (ftdi_usb_purge_buffers(&presto->ftdic) < 0)
353 return ERROR_JTAG_DEVICE_ERROR;
354
355 presto_data = 0xD0;
356 if (presto_write(&presto_data, 1) != ERROR_OK)
357 return ERROR_JTAG_DEVICE_ERROR;
358
359 if (presto_read(&presto_data, 1) != ERROR_OK)
360 {
361 LOG_ERROR("no response from PRESTO, giving up");
362 return ERROR_JTAG_DEVICE_ERROR;
363 }
364 }
365
366 if (presto_write(presto_init_seq, sizeof(presto_init_seq)) != ERROR_OK)
367 {
368 LOG_ERROR("error writing PRESTO init sequence");
369 return ERROR_JTAG_DEVICE_ERROR;
370 }
371
372 return ERROR_OK;
373 }
374 #endif /* BUILD_PRESTO_LIBFTDI == 1 */
375
376 static int presto_open(char *req_serial)
377 {
378 presto->buff_out_pos = 0;
379 presto->buff_in_pos = 0;
380 presto->buff_in_len = 0;
381 presto->buff_in_exp = 0;
382
383 presto->total_out = 0;
384 presto->total_in = 0;
385
386 presto->jtag_tms = 0;
387 presto->jtag_tck = 0;
388 presto->jtag_rst = 0;
389 presto->jtag_tdi_data = 0;
390 presto->jtag_tdi_count = 0;
391
392 presto->jtag_speed = 0;
393
394 #if BUILD_PRESTO_FTD2XX == 1
395 return presto_open_ftd2xx(req_serial);
396 #elif BUILD_PRESTO_LIBFTDI == 1
397 return presto_open_libftdi(req_serial);
398 #endif
399 }
400
401 static int presto_close(void)
402 {
403
404 int result = ERROR_OK;
405
406 #if BUILD_PRESTO_FTD2XX == 1
407 unsigned long ftbytes;
408
409 if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE)
410 return result;
411
412 presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX);
413 if (presto->status != FT_OK)
414 result = ERROR_JTAG_DEVICE_ERROR;
415
416 presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes);
417 if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq))
418 result = ERROR_JTAG_DEVICE_ERROR;
419
420 if ((presto->status = FT_SetLatencyTimer(presto->handle, 16)) != FT_OK)
421 result = ERROR_JTAG_DEVICE_ERROR;
422
423 if ((presto->status = FT_Close(presto->handle)) != FT_OK)
424 result = ERROR_JTAG_DEVICE_ERROR;
425 else
426 presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE;
427
428 #elif BUILD_PRESTO_LIBFTDI == 1
429
430 if ((presto->retval = ftdi_write_data(&presto->ftdic, presto_init_seq, sizeof(presto_init_seq))) != sizeof(presto_init_seq))
431 result = ERROR_JTAG_DEVICE_ERROR;
432
433 if ((presto->retval = ftdi_set_latency_timer(&presto->ftdic, 16)) < 0)
434 result = ERROR_JTAG_DEVICE_ERROR;
435
436 if ((presto->retval = ftdi_usb_close(&presto->ftdic)) < 0)
437 result = ERROR_JTAG_DEVICE_ERROR;
438 else
439 ftdi_deinit(&presto->ftdic);
440 #endif
441
442 return result;
443 }
444
445 static int presto_flush(void)
446 {
447 if (presto->buff_out_pos == 0)
448 return ERROR_OK;
449
450 #if BUILD_PRESTO_FTD2XX == 1
451 if (presto->status != FT_OK)
452 #elif BUILD_PRESTO_LIBFTDI == 1
453 if (presto->retval < 0)
454 #endif
455 {
456 LOG_DEBUG("error in previous communication, canceling I/O operation");
457 return ERROR_JTAG_DEVICE_ERROR;
458 }
459
460 if (presto_write(presto->buff_out, presto->buff_out_pos) != ERROR_OK)
461 {
462 presto->buff_out_pos = 0;
463 return ERROR_JTAG_DEVICE_ERROR;
464 }
465
466 presto->total_out += presto->buff_out_pos;
467 presto->buff_out_pos = 0;
468
469 if (presto->buff_in_exp == 0)
470 return ERROR_OK;
471
472 presto->buff_in_pos = 0;
473 presto->buff_in_len = 0;
474
475 if (presto_read(presto->buff_in, presto->buff_in_exp) != ERROR_OK)
476 {
477 presto->buff_in_exp = 0;
478 return ERROR_JTAG_DEVICE_ERROR;
479 }
480
481 presto->total_in += presto->buff_in_exp;
482 presto->buff_in_len = presto->buff_in_exp;
483 presto->buff_in_exp = 0;
484
485 return ERROR_OK;
486 }
487
488 static int presto_sendbyte(int data)
489 {
490 if (data == EOF) return presto_flush();
491
492 if (presto->buff_out_pos < BUFFER_SIZE)
493 {
494 presto->buff_out[presto->buff_out_pos++] = (uint8_t)data;
495 if (((data & 0xC0) == 0x40) || ((data & 0xD0)== 0xD0))
496 presto->buff_in_exp++;
497 }
498 else
499 return ERROR_JTAG_DEVICE_ERROR;
500
501 #if BUILD_PRESTO_FTD2XX == 1
502 if (presto->buff_out_pos >= BUFFER_SIZE)
503 #elif BUILD_PRESTO_LIBFTDI == 1
504 /* libftdi does not do background read, be sure that USB IN buffer does not overflow (128 bytes only!) */
505 if (presto->buff_out_pos >= BUFFER_SIZE || presto->buff_in_exp == 128)
506 #endif
507 return presto_flush();
508
509 return ERROR_OK;
510 }
511
512 #if 0
513 static int presto_getbyte(void)
514 {
515 if (presto->buff_in_pos < presto->buff_in_len)
516 return presto->buff_in[presto->buff_in_pos++];
517
518 if (presto->buff_in_exp == 0)
519 return -1;
520
521 if (presto_flush() != ERROR_OK)
522 return -1;
523
524 if (presto->buff_in_pos < presto->buff_in_len)
525 return presto->buff_in[presto->buff_in_pos++];
526
527 return -1;
528 }
529 #endif
530
531 /* -------------------------------------------------------------------------- */
532
533 static int presto_tdi_flush(void)
534 {
535 if (presto->jtag_tdi_count == 0)
536 return 0;
537
538 if (presto->jtag_tck == 0)
539 {
540 LOG_ERROR("BUG: unexpected TAP condition, TCK low");
541 return -1;
542 }
543
544 presto->jtag_tdi_data |= (presto->jtag_tdi_count - 1) << 4;
545 presto_sendbyte(presto->jtag_tdi_data);
546 presto->jtag_tdi_count = 0;
547 presto->jtag_tdi_data = 0;
548
549 return 0;
550 }
551
552 static int presto_tck_idle(void)
553 {
554 if (presto->jtag_tck == 1)
555 {
556 presto_sendbyte(0xCA);
557 presto->jtag_tck = 0;
558 }
559
560 return 0;
561 }
562
563 /* -------------------------------------------------------------------------- */
564
565 static int presto_bitq_out(int tms, int tdi, int tdo_req)
566 {
567 int i;
568 unsigned char cmd;
569
570 if (presto->jtag_tck == 0)
571 {
572 presto_sendbyte(0xA4); /* LED idicator - JTAG active */
573 }
574 else if (presto->jtag_speed == 0 && !tdo_req && tms == presto->jtag_tms)
575 {
576 presto->jtag_tdi_data |= (tdi != 0) << presto->jtag_tdi_count;
577
578 if (++presto->jtag_tdi_count == 4)
579 presto_tdi_flush();
580
581 return 0;
582 }
583
584 presto_tdi_flush();
585
586 cmd = tdi ? 0xCB : 0xCA;
587 presto_sendbyte(cmd);
588
589 if (tms != presto->jtag_tms)
590 {
591 presto_sendbyte((tms ? 0xEC : 0xE8) | (presto->jtag_rst ? 0x02 : 0));
592 presto->jtag_tms = tms;
593 }
594
595 /* delay with TCK low */
596 for (i = presto->jtag_speed; i > 1; i--)
597 presto_sendbyte(cmd);
598
599 cmd |= 0x04;
600 presto_sendbyte(cmd | (tdo_req ? 0x10 : 0));
601
602 /* delay with TCK high */
603 for (i = presto->jtag_speed; i > 1; i--)
604 presto_sendbyte(cmd);
605
606 presto->jtag_tck = 1;
607
608 return 0;
609 }
610
611 static int presto_bitq_flush(void)
612 {
613 presto_tdi_flush();
614 presto_tck_idle();
615
616 presto_sendbyte(0xA0); /* LED idicator - JTAG idle */
617
618 return presto_flush();
619 }
620
621 static int presto_bitq_in_rdy(void)
622 {
623 if (presto->buff_in_pos >= presto->buff_in_len)
624 return 0;
625 return presto->buff_in_len-presto->buff_in_pos;
626 }
627
628 static int presto_bitq_in(void)
629 {
630 if (presto->buff_in_pos >= presto->buff_in_len)
631 return -1;
632 if (presto->buff_in[presto->buff_in_pos++]&0x08) return 1;
633 return 0;
634 }
635
636 static int presto_bitq_sleep(unsigned long us)
637 {
638 long waits;
639
640 presto_tdi_flush();
641 presto_tck_idle();
642
643 if (us > 100000)
644 {
645 presto_bitq_flush();
646 jtag_sleep(us);
647 return 0;
648 }
649
650 waits = us / 170 + 2;
651 while (waits--)
652 presto_sendbyte(0x80);
653
654 return 0;
655 }
656
657 static int presto_bitq_reset(int trst, int srst)
658 {
659 presto_tdi_flush();
660 presto_tck_idle();
661
662 /* add a delay after possible TCK transition */
663 presto_sendbyte(0x80);
664 presto_sendbyte(0x80);
665
666 presto->jtag_rst = trst || srst;
667 presto_sendbyte((presto->jtag_rst ? 0xEA : 0xE8) | (presto->jtag_tms ? 0x04 : 0));
668
669 return 0;
670 }
671
672 static struct bitq_interface presto_bitq = {
673 .out = &presto_bitq_out,
674 .flush = &presto_bitq_flush,
675 .sleep = &presto_bitq_sleep,
676 .reset = &presto_bitq_reset,
677 .in_rdy = &presto_bitq_in_rdy,
678 .in = &presto_bitq_in,
679 };
680
681 /* -------------------------------------------------------------------------- */
682
683 static int presto_adapter_khz(int khz, int *jtag_speed)
684 {
685 if (khz < 0)
686 {
687 *jtag_speed = 0;
688 return ERROR_INVALID_ARGUMENTS;
689 }
690
691 if (khz >= 3000) *jtag_speed = 0;
692 else *jtag_speed = (1000 + khz-1)/khz;
693
694 return 0;
695 }
696
697 static int presto_jtag_speed_div(int speed, int *khz)
698 {
699 if ((speed < 0) || (speed > 1000))
700 {
701 *khz = 0;
702 return ERROR_INVALID_ARGUMENTS;
703 }
704
705 if (speed == 0) *khz = 3000;
706 else *khz = 1000/speed;
707
708 return 0;
709 }
710
711 static int presto_jtag_speed(int speed)
712 {
713 int khz;
714
715 if (presto_jtag_speed_div(speed, &khz))
716 {
717 return ERROR_INVALID_ARGUMENTS;
718 }
719
720 presto->jtag_speed = speed;
721
722 if (khz%1000 == 0)
723 LOG_INFO("setting speed to %d, max. TCK freq. is %d MHz", speed, khz/1000);
724 else
725 LOG_INFO("setting speed to %d, max. TCK freq. is %d kHz", speed, khz);
726
727 return 0;
728 }
729
730 static char *presto_serial;
731
732 COMMAND_HANDLER(presto_handle_serial_command)
733 {
734 if (CMD_ARGC == 1)
735 {
736 if (presto_serial)
737 free(presto_serial);
738 presto_serial = strdup(CMD_ARGV[0]);
739 }
740 else
741 {
742 LOG_ERROR("expected exactly one argument to presto_serial <serial-number>");
743 }
744
745 return ERROR_OK;
746 }
747
748 static const struct command_registration presto_command_handlers[] = {
749 {
750 .name = "presto_serial",
751 .handler = presto_handle_serial_command,
752 .mode = COMMAND_CONFIG,
753 .help = "Configure USB serial number of Presto device.",
754 .usage = "serial_string",
755 },
756 COMMAND_REGISTRATION_DONE
757 };
758
759 static int presto_jtag_init(void)
760 {
761 if (presto_open(presto_serial) != ERROR_OK)
762 {
763 presto_close();
764 if (presto_serial != NULL)
765 LOG_ERROR("Cannot open PRESTO, serial number '%s'", presto_serial);
766 else
767 LOG_ERROR("Cannot open PRESTO");
768 return ERROR_JTAG_INIT_FAILED;
769 }
770 LOG_INFO("PRESTO open, serial number '%s'", presto->serial);
771
772 /* use JTAG speed setting from configuration file */
773 presto_jtag_speed(jtag_get_speed());
774
775 bitq_interface = &presto_bitq;
776 return ERROR_OK;
777 }
778
779 static int presto_jtag_quit(void)
780 {
781 bitq_cleanup();
782 presto_close();
783 LOG_INFO("PRESTO closed");
784
785 if (presto_serial)
786 {
787 free(presto_serial);
788 presto_serial = NULL;
789 }
790
791 return ERROR_OK;
792 }
793
794 struct jtag_interface presto_interface = {
795 .name = "presto",
796 .commands = presto_command_handlers,
797
798 .execute_queue = bitq_execute_queue,
799 .speed = presto_jtag_speed,
800 .khz = presto_adapter_khz,
801 .speed_div = presto_jtag_speed_div,
802 .init = presto_jtag_init,
803 .quit = presto_jtag_quit,
804 };
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