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Added OpenJTAG Driver
[openocd.git] / src / jtag / drivers / openjtag.c
blob85d17938ed4f5167010c9d6f3da5001ea02244d0
1 /*******************************************************************************
2 * Driver for OpenJTAG Project (www.openjtag.org) *
3 * Compatible with libftdi and ftd2xx drivers. *
4 * *
5 * Copyright (C) 2010 by Ivan Meleca <mileca@gmail.com> *
6 * *
7 * Copyright (C) 2013 by Ryan Corbin, GlueLogix Inc. <corbin.ryan@gmail.com> *
8 * Updated to work with OpenOCD v0.7.0. Fixed libftdi read speed issue. *
9 * *
10 * Based on usb_blaster.c *
11 * Copyright (C) 2009 Catalin Patulea *
12 * Copyright (C) 2006 Kolja Waschk *
13 * *
14 * And jlink.c *
15 * Copyright (C) 2008 by Spencer Oliver *
16 * spen@spen-soft.co.uk *
17 * *
18 * This program is free software; you can redistribute it and/or modify *
19 * it under the terms of the GNU General Public License as published by *
20 * the Free Software Foundation; either version 2 of the License, or *
21 * (at your option) any later version. *
22 * *
23 * This program is distributed in the hope that it will be useful, *
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
26 * GNU General Public License for more details. *
27 * *
28 * You should have received a copy of the GNU General Public License *
29 * along with this program; if not, write to the *
30 * Free Software Foundation, Inc., *
31 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
32 ***************************************************************************/
33
34 /***************************************************************************
35 * Version 1.0 Tested on a MCBSTM32 board using a Cortex M3 (stm32f103x), *
36 * GDB and Eclipse under Linux (Ubuntu 10.04) *
37 * *
38 ***************************************************************************/
39
40 #ifdef HAVE_CONFIG_H
41 #include "config.h"
42 #endif
43
44 #include <jtag/interface.h>
45 #include <jtag/commands.h>
46 #include "usb_common.h"
47
48 /*
49 * OpenJTAG-OpenOCD state conversion
50 */
51 typedef enum openjtag_tap_state {
52 OPENJTAG_TAP_INVALID = -1,
53 OPENJTAG_TAP_RESET = 0,
54 OPENJTAG_TAP_IDLE = 1,
55 OPENJTAG_TAP_SELECT_DR = 2,
56 OPENJTAG_TAP_CAPTURE_DR = 3,
57 OPENJTAG_TAP_SHIFT_DR = 4,
58 OPENJTAG_TAP_EXIT1_DR = 5,
59 OPENJTAG_TAP_PAUSE_DR = 6,
60 OPENJTAG_TAP_EXIT2_DR = 7,
61 OPENJTAG_TAP_UPDATE_DR = 8,
62 OPENJTAG_TAP_SELECT_IR = 9,
63 OPENJTAG_TAP_CAPURE_IR = 10,
64 OPENJTAG_TAP_SHIFT_IR = 11,
65 OPENJTAG_TAP_EXIT1_IR = 12,
66 OPENJTAG_TAP_PAUSE_IR = 13,
67 OPENJTAG_TAP_EXIT2_IR = 14,
68 OPENJTAG_TAP_UPDATE_IR = 15,
69 } openjtag_tap_state_t;
70
71 #if (BUILD_OPENJTAG_FTD2XX == 1 && BUILD_OPENJTAG_LIBFTDI == 1)
72 #error "BUILD_OPENJTAG_FTD2XX && BUILD_OPENJTAG_LIBFTDI "
73 "are mutually exclusive"
74 #elif (BUILD_OPENJTAG_FTD2XX != 1 && BUILD_OPENJTAG_LIBFTDI != 1)
75 #error "BUILD_OPENJTAG_FTD2XX || BUILD_OPENJTAG_LIBFTDI must be chosen"
76 #endif
77
78 /* OPENJTAG access library includes */
79 #if BUILD_OPENJTAG_FTD2XX == 1
80 #include <ftd2xx.h>
81 #elif BUILD_OPENJTAG_LIBFTDI == 1
82 #include <ftdi.h>
83 #endif
84
85 /* OpenJTAG vid/pid */
86 static uint16_t openjtag_vid = 0x0403;
87 static uint16_t openjtag_pid = 0x6001;
88
89 static char *openjtag_device_desc;
90
91 #if BUILD_OPENJTAG_FTD2XX == 1
92 static FT_HANDLE ftdih;
93
94 #elif BUILD_OPENJTAG_LIBFTDI == 1
95 static struct ftdi_context ftdic;
96 #endif
97
98 #define OPENJTAG_BUFFER_SIZE 504
99 #define OPENJTAG_MAX_PENDING_RESULTS 256
100
101 struct openjtag_scan_result {
102 uint32_t bits; /* Length in bits*/
103 struct scan_command *command; /* Corresponding scan command */
104 uint8_t *buffer;
105 };
106
107 /* USB RX/TX buffers */
108 static int usb_tx_buf_offs;
109 static uint8_t usb_tx_buf[OPENJTAG_BUFFER_SIZE];
110 static uint32_t usb_rx_buf_len;
111 static uint8_t usb_rx_buf[OPENJTAG_BUFFER_SIZE];
112
113 /* Pending readings */
114 static struct openjtag_scan_result openjtag_scan_result_buffer[OPENJTAG_MAX_PENDING_RESULTS];
115 static int openjtag_scan_result_count;
116
117 /* Openocd usb handler */
118 struct openocd {
119 struct usb_dev_handle *usb_handle;
120 };
121
122 #ifdef _DEBUG_USB_COMMS_
123
124 #define DEBUG_TYPE_READ 0
125 #define DEBUG_TYPE_WRITE 1
126 #define DEBUG_TYPE_OCD_READ 2
127 #define DEBUG_TYPE_BUFFER 3
128
129 #define LINE_LEN 16
130 static void openjtag_debug_buffer(uint8_t *buffer, int length, uint8_t type)
131 {
132 char line[128];
133 char s[4];
134 int i;
135 int j;
136
137 switch (type) {
138 case DEBUG_TYPE_READ:
139 sprintf(line, "USB READ %d bytes", length);
140 break;
141 case DEBUG_TYPE_WRITE:
142 sprintf(line, "USB WRITE %d bytes", length);
143 break;
144 case DEBUG_TYPE_OCD_READ:
145 sprintf(line, "TO OpenOCD %d bytes", length);
146 break;
147 case DEBUG_TYPE_BUFFER:
148 sprintf(line, "Buffer %d bytes", length);
149 break;
150 }
151
152 LOG_DEBUG("%s", line);
153
154 for (i = 0; i < length; i += LINE_LEN) {
155 switch (type) {
156 case DEBUG_TYPE_READ:
157 sprintf(line, "USB READ: %04x", i);
158 break;
159 case DEBUG_TYPE_WRITE:
160 sprintf(line, "USB WRITE: %04x", i);
161 break;
162 case DEBUG_TYPE_OCD_READ:
163 sprintf(line, "TO OpenOCD: %04x", i);
164 break;
165 case DEBUG_TYPE_BUFFER:
166 sprintf(line, "BUFFER: %04x", i);
167 break;
168 }
169
170 for (j = i; j < i + LINE_LEN && j < length; j++) {
171 sprintf(s, " %02x", buffer[j]);
172 strcat(line, s);
173 }
174 LOG_DEBUG("%s", line);
175 }
176
177 }
178
179 #endif
180
181 static int8_t openjtag_get_tap_state(int8_t state)
182 {
183
184 switch (state) {
185 case TAP_DREXIT2: return OPENJTAG_TAP_EXIT2_DR;
186 case TAP_DREXIT1: return OPENJTAG_TAP_EXIT1_DR;
187 case TAP_DRSHIFT: return OPENJTAG_TAP_SHIFT_DR;
188 case TAP_DRPAUSE: return OPENJTAG_TAP_PAUSE_DR;
189 case TAP_IRSELECT: return OPENJTAG_TAP_SELECT_IR;
190 case TAP_DRUPDATE: return OPENJTAG_TAP_UPDATE_DR;
191 case TAP_DRCAPTURE: return OPENJTAG_TAP_CAPTURE_DR;
192 case TAP_DRSELECT: return OPENJTAG_TAP_SELECT_DR;
193 case TAP_IREXIT2: return OPENJTAG_TAP_EXIT2_IR;
194 case TAP_IREXIT1: return OPENJTAG_TAP_EXIT1_IR;
195 case TAP_IRSHIFT: return OPENJTAG_TAP_SHIFT_IR;
196 case TAP_IRPAUSE: return OPENJTAG_TAP_PAUSE_IR;
197 case TAP_IDLE: return OPENJTAG_TAP_IDLE;
198 case TAP_IRUPDATE: return OPENJTAG_TAP_UPDATE_IR;
199 case TAP_IRCAPTURE: return OPENJTAG_TAP_CAPURE_IR;
200 case TAP_RESET: return OPENJTAG_TAP_RESET;
201 case TAP_INVALID:
202 default: return OPENJTAG_TAP_INVALID;
203 }
204 }
205
206 static int openjtag_buf_write(
207 uint8_t *buf, int size, uint32_t *bytes_written)
208 {
209 #if BUILD_OPENJTAG_FTD2XX == 1
210 FT_STATUS status;
211 DWORD dw_bytes_written;
212
213 #ifdef _DEBUG_USB_COMMS_
214 openjtag_debug_buffer(buf, size, DEBUG_TYPE_WRITE);
215 #endif
216
217 status = FT_Write(ftdih, buf, size, &dw_bytes_written);
218 if (status != FT_OK) {
219 *bytes_written = dw_bytes_written;
220 LOG_ERROR("FT_Write returned: %u", status);
221 return ERROR_JTAG_DEVICE_ERROR;
222 }
223 *bytes_written = dw_bytes_written;
224 return ERROR_OK;
225 #elif BUILD_OPENJTAG_LIBFTDI == 1
226 int retval;
227 #ifdef _DEBUG_USB_COMMS_
228 openjtag_debug_buffer(buf, size, DEBUG_TYPE_WRITE);
229 #endif
230
231 retval = ftdi_write_data(&ftdic, buf, size);
232 if (retval < 0) {
233 *bytes_written = 0;
234 LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&ftdic));
235 return ERROR_JTAG_DEVICE_ERROR;
236 }
237
238 *bytes_written += retval;
239
240 return ERROR_OK;
241 #endif
242 }
243
244 static int openjtag_buf_read(uint8_t *buf, uint32_t qty, uint32_t *bytes_read)
245 {
246
247 #if BUILD_OPENJTAG_FTD2XX == 1
248 DWORD dw_bytes_read;
249 FT_STATUS status;
250 int timeout = 50;
251
252 *bytes_read = 0;
253 while (qty && (*bytes_read < qty) && timeout--) {
254
255 status = FT_Read(ftdih, buf + *bytes_read,
256 qty - *bytes_read, &dw_bytes_read);
257 if (status != FT_OK) {
258 *bytes_read = dw_bytes_read;
259 LOG_ERROR("FT_Read returned: %u", status);
260 return ERROR_JTAG_DEVICE_ERROR;
261 }
262 *bytes_read += dw_bytes_read;
263 }
264
265 #ifdef _DEBUG_USB_COMMS_
266 openjtag_debug_buffer(buf, *bytes_read, DEBUG_TYPE_READ);
267 #endif
268
269 return ERROR_OK;
270 #elif BUILD_OPENJTAG_LIBFTDI == 1
271 int retval;
272 int timeout = 5;
273
274 *bytes_read = 0;
275
276 while ((*bytes_read < qty) && timeout--) {
277 retval = ftdi_read_data(&ftdic, buf + *bytes_read,
278 qty - *bytes_read);
279 if (retval < 0) {
280 *bytes_read = 0;
281 DEBUG_JTAG_IO("ftdi_read_data: %s",
282 ftdi_get_error_string(&ftdic));
283 return ERROR_JTAG_DEVICE_ERROR;
284 }
285 *bytes_read += retval;
286 }
287
288 #ifdef _DEBUG_USB_COMMS_
289 openjtag_debug_buffer(buf, *bytes_read, DEBUG_TYPE_READ);
290 #endif
291
292 #endif
293 return ERROR_OK;
294 }
295
296 static int openjtag_sendcommand(uint8_t cmd)
297 {
298 uint32_t written;
299 return openjtag_buf_write(&cmd, 1, &written);
300 }
301
302 static int openjtag_speed(int speed)
303 {
304 int clockcmd;
305 switch (speed) {
306 case 48000:
307 clockcmd = 0x00;
308 break;
309 case 24000:
310 clockcmd = 0x20;
311 break;
312 case 12000:
313 clockcmd = 0x40;
314 break;
315 case 6000:
316 clockcmd = 0x60;
317 break;
318 case 3000:
319 clockcmd = 0x80;
320 break;
321 case 1500:
322 clockcmd = 0xA0;
323 break;
324 case 750:
325 clockcmd = 0xC0;
326 break;
327 case 375:
328 clockcmd = 0xE0;
329 break;
330 default:
331 clockcmd = 0xE0;
332 LOG_WARNING("adapter speed not recognized, reverting to 375 kHz");
333 break;
334 }
335 openjtag_sendcommand(clockcmd);
336
337 return ERROR_OK;
338 }
339
340 static int openjtag_init(void)
341 {
342 uint8_t latency_timer;
343
344 #if BUILD_OPENJTAG_FTD2XX == 1
345 FT_STATUS status;
346 #endif
347
348 usb_tx_buf_offs = 0;
349 usb_rx_buf_len = 0;
350 openjtag_scan_result_count = 0;
351
352 #if BUILD_OPENJTAG_FTD2XX == 1
353 LOG_DEBUG("'openjtag' interface using FTD2XX");
354 #elif BUILD_OPENJTAG_LIBFTDI == 1
355 LOG_DEBUG("'openjtag' interface using libftdi");
356 #endif
357
358 /* Open by device description */
359 if (openjtag_device_desc == NULL) {
360 LOG_WARNING("no openjtag device description specified, "
361 "using default 'Open JTAG Project'");
362 openjtag_device_desc = "Open JTAG Project";
363 }
364
365 #if BUILD_OPENJTAG_FTD2XX == 1
366
367 #if IS_WIN32 == 0
368 /* Add non-standard Vid/Pid to the linux driver */
369 status = FT_SetVIDPID(openjtag_vid, openjtag_pid);
370 if (status != FT_OK) {
371 LOG_WARNING("couldn't add %4.4x:%4.4x",
372 openjtag_vid, openjtag_pid);
373 }
374 #endif
375
376 status = FT_OpenEx(openjtag_device_desc, FT_OPEN_BY_DESCRIPTION,
377 &ftdih);
378 if (status != FT_OK) {
379 DWORD num_devices;
380
381 LOG_ERROR("unable to open ftdi device: %u", status);
382 status = FT_ListDevices(&num_devices, NULL,
383 FT_LIST_NUMBER_ONLY);
384 if (status == FT_OK) {
385 char **desc_array = malloc(sizeof(char *)
386 * (num_devices + 1));
387 unsigned int i;
388
389 for (i = 0; i < num_devices; i++)
390 desc_array[i] = malloc(64);
391 desc_array[num_devices] = NULL;
392
393 status = FT_ListDevices(desc_array, &num_devices,
394 FT_LIST_ALL | FT_OPEN_BY_DESCRIPTION);
395
396 if (status == FT_OK) {
397 LOG_ERROR("ListDevices: %u\n", num_devices);
398 for (i = 0; i < num_devices; i++)
399 LOG_ERROR("%i: %s", i, desc_array[i]);
400 }
401
402 for (i = 0; i < num_devices; i++)
403 free(desc_array[i]);
404 free(desc_array);
405 } else {
406 LOG_ERROR("ListDevices: NONE\n");
407 }
408 return ERROR_JTAG_INIT_FAILED;
409 }
410
411 status = FT_SetLatencyTimer(ftdih, 2);
412 if (status != FT_OK) {
413 LOG_ERROR("unable to set latency timer: %u", status);
414 return ERROR_JTAG_INIT_FAILED;
415 }
416
417 status = FT_GetLatencyTimer(ftdih, &latency_timer);
418 if (status != FT_OK) {
419 LOG_ERROR("unable to get latency timer: %u", status);
420 return ERROR_JTAG_INIT_FAILED;
421 }
422 LOG_DEBUG("current latency timer: %i", latency_timer);
423
424 status = FT_SetBitMode(ftdih, 0x00, 0x40);
425 if (status != FT_OK) {
426 LOG_ERROR("unable to disable bit i/o mode: %u", status);
427 return ERROR_JTAG_INIT_FAILED;
428 }
429
430 status = FT_SetTimeouts(ftdih, 50, 0);
431 if (status != FT_OK) {
432 LOG_ERROR("unable to set timeouts: %u", status);
433 return ERROR_JTAG_INIT_FAILED;
434 }
435
436 status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX);
437 if (status != FT_OK) {
438 LOG_ERROR("unable to FT_Purge() %u", status);
439 return ERROR_JTAG_INIT_FAILED;
440 }
441
442 #elif BUILD_OPENJTAG_LIBFTDI == 1
443 if (ftdi_init(&ftdic) < 0)
444 return ERROR_JTAG_INIT_FAILED;
445
446 /* context, vendor id, product id, description, serial id */
447 if (ftdi_usb_open_desc(&ftdic, openjtag_vid, openjtag_pid, openjtag_device_desc, NULL) < 0) {
448 LOG_ERROR("unable to open ftdi device: %s", ftdic.error_str);
449 return ERROR_JTAG_INIT_FAILED;
450 }
451
452 if (ftdi_usb_reset(&ftdic) < 0) {
453 LOG_ERROR("unable to reset ftdi device");
454 return ERROR_JTAG_INIT_FAILED;
455 }
456
457 if (ftdi_set_latency_timer(&ftdic, 2) < 0) {
458 LOG_ERROR("unable to set latency timer");
459 return ERROR_JTAG_INIT_FAILED;
460 }
461
462 if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0) {
463 LOG_ERROR("unable to get latency timer");
464 return ERROR_JTAG_INIT_FAILED;
465 }
466 LOG_DEBUG("current latency timer: %u", latency_timer);
467
468 ftdi_disable_bitbang(&ftdic);
469 /* was (3000000 / 4) with a comment about a bug in libftdi when using high baudrate */
470 if (ftdi_set_baudrate(&ftdic, 3000000) < 0) {
471 LOG_ERROR("Can't set baud rate to max: %s",
472 ftdi_get_error_string(&ftdic));
473 return ERROR_JTAG_DEVICE_ERROR;
474 };
475 #endif
476
477 #if BUILD_OPENJTAG_FTD2XX == 1
478 status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX);
479 if (status != FT_OK)
480 return ERROR_JTAG_INIT_FAILED;
481 #elif BUILD_OPENJTAG_LIBFTDI == 1
482 if (ftdi_usb_purge_buffers(&ftdic) < 0) {
483 LOG_ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
484 return ERROR_JTAG_INIT_FAILED;
485 }
486 #endif
487
488 /* OpenJTAG speed */
489 openjtag_sendcommand(0xE0); /*Start at slowest adapter speed*/
490
491 /* MSB */
492 openjtag_sendcommand(0x75);
493
494 return ERROR_OK;
495 }
496
497 static int openjtag_quit(void)
498 {
499 #if BUILD_OPENJTAG_FTD2XX == 1
500 FT_Close(ftdih);
501 #elif BUILD_OPENJTAG_LIBFTDI == 1
502 ftdi_usb_close(&ftdic);
503 ftdi_deinit(&ftdic);
504 #endif
505
506 return ERROR_OK;
507 }
508
509 static void openjtag_write_tap_buffer(void)
510 {
511 uint32_t written;
512
513 openjtag_buf_write(usb_tx_buf, usb_tx_buf_offs, &written);
514 openjtag_buf_read(usb_rx_buf, usb_tx_buf_offs, &usb_rx_buf_len);
515
516 usb_tx_buf_offs = 0;
517 }
518
519 static int openjtag_execute_tap_queue(void)
520 {
521 openjtag_write_tap_buffer();
522
523 int res_count = 0;
524
525 if (openjtag_scan_result_count && usb_rx_buf_len) {
526
527 int count;
528 int rx_offs = 0;
529 int len;
530
531 /* for every pending result */
532 while (res_count < openjtag_scan_result_count) {
533
534 /* get sent bits */
535 len = openjtag_scan_result_buffer[res_count].bits;
536
537 count = 0;
538
539 uint8_t *buffer = openjtag_scan_result_buffer[res_count].buffer;
540
541 while (len) {
542 if (len <= 8) {
543 DEBUG_JTAG_IO("bits < 8 buf = 0x%X, will be 0x%X",
544 usb_rx_buf[rx_offs], usb_rx_buf[rx_offs] >> (8 - len));
545 buffer[count] = usb_rx_buf[rx_offs] >> (8 - len);
546 len = 0;
547 } else {
548 buffer[count] = usb_rx_buf[rx_offs];
549 len -= 8;
550 }
551
552 rx_offs++;
553 count++;
554 }
555
556 #ifdef _DEBUG_USB_COMMS_
557 openjtag_debug_buffer(buffer,
558 DIV_ROUND_UP(openjtag_scan_result_buffer[res_count].bits, 8), DEBUG_TYPE_OCD_READ);
559 #endif
560 jtag_read_buffer(buffer, openjtag_scan_result_buffer[res_count].command);
561
562 if (openjtag_scan_result_buffer[res_count].buffer)
563 free(openjtag_scan_result_buffer[res_count].buffer);
564
565 res_count++;
566 }
567 }
568
569 openjtag_scan_result_count = 0;
570
571 return ERROR_OK;
572 }
573
574 static void openjtag_add_byte(char buf)
575 {
576
577 if (usb_tx_buf_offs == OPENJTAG_BUFFER_SIZE) {
578 DEBUG_JTAG_IO("Forcing execute_tap_queue");
579 DEBUG_JTAG_IO("TX Buff offs=%d", usb_tx_buf_offs);
580 openjtag_execute_tap_queue();
581 }
582
583 usb_tx_buf[usb_tx_buf_offs] = buf;
584 usb_tx_buf_offs++;
585 }
586
587 static void openjtag_add_scan(uint8_t *buffer, int length, struct scan_command *scan_cmd)
588 {
589
590 /* Ensure space to send long chains */
591 /* We add two byte for each eight (or less) bits, one for command, one for data */
592 if (usb_tx_buf_offs + (DIV_ROUND_UP(length, 8) * 2) >= OPENJTAG_BUFFER_SIZE) {
593 DEBUG_JTAG_IO("Forcing execute_tap_queue from scan");
594 DEBUG_JTAG_IO("TX Buff offs=%d len=%d", usb_tx_buf_offs, DIV_ROUND_UP(length, 8) * 2);
595 openjtag_execute_tap_queue();
596 }
597
598 openjtag_scan_result_buffer[openjtag_scan_result_count].bits = length;
599 openjtag_scan_result_buffer[openjtag_scan_result_count].command = scan_cmd;
600 openjtag_scan_result_buffer[openjtag_scan_result_count].buffer = buffer;
601
602 uint8_t command;
603 uint8_t bits;
604 int count = 0;
605 while (length) {
606
607 /* write command */
608 command = 6;
609
610 /* last bits? */
611 if (length <= 8) {
612 /* tms high */
613 command |= (1 << 4);
614
615 /* bits to transfer */
616 bits = (length - 1);
617 command |= bits << 5;
618 length = 0;
619 } else {
620 /* whole byte */
621
622 /* bits to transfer */
623 bits = 7;
624 command |= (7 << 5);
625 length -= 8;
626 }
627
628 openjtag_add_byte(command);
629 openjtag_add_byte(buffer[count]);
630 count++;
631 }
632
633 openjtag_scan_result_count++;
634 }
635
636 static void openjtag_execute_reset(struct jtag_command *cmd)
637 {
638
639 DEBUG_JTAG_IO("reset trst: %i srst %i",
640 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
641
642 uint8_t buf = 0x00;
643
644 if (cmd->cmd.reset->trst) {
645 buf = 0x03;
646 } else {
647 buf |= 0x04;
648 buf |= 0x05 << 4;
649 }
650
651 openjtag_add_byte(buf);
652 }
653
654 static void openjtag_execute_sleep(struct jtag_command *cmd)
655 {
656 jtag_sleep(cmd->cmd.sleep->us);
657 }
658
659 static void openjtag_set_state(uint8_t openocd_state)
660 {
661 int8_t state = openjtag_get_tap_state(openocd_state);
662
663 uint8_t buf = 0;
664 buf = 0x01;
665 buf |= state << 4;
666
667 openjtag_add_byte(buf);
668 }
669
670 static void openjtag_execute_statemove(struct jtag_command *cmd)
671 {
672 DEBUG_JTAG_IO("state move to %i", cmd->cmd.statemove->end_state);
673
674 tap_set_end_state(cmd->cmd.statemove->end_state);
675
676 openjtag_set_state(cmd->cmd.statemove->end_state);
677
678 tap_set_state(tap_get_end_state());
679 }
680
681
682 static void openjtag_execute_scan(struct jtag_command *cmd)
683 {
684
685 int scan_size, old_state;
686 uint8_t *buffer;
687
688 DEBUG_JTAG_IO("scan ends in %s", tap_state_name(cmd->cmd.scan->end_state));
689
690 /* get scan info */
691 tap_set_end_state(cmd->cmd.scan->end_state);
692 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
693
694 #ifdef _DEBUG_USB_COMMS_
695 openjtag_debug_buffer(buffer, (scan_size + 7) / 8, DEBUG_TYPE_BUFFER);
696 #endif
697 /* set state */
698 old_state = tap_get_end_state();
699 openjtag_set_state(cmd->cmd.scan->ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
700 tap_set_state(cmd->cmd.scan->ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
701 tap_set_end_state(old_state);
702
703 openjtag_add_scan(buffer, scan_size, cmd->cmd.scan);
704
705 openjtag_set_state(cmd->cmd.scan->ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
706 tap_set_state(cmd->cmd.scan->ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
707
708 if (tap_get_state() != tap_get_end_state()) {
709 openjtag_set_state(tap_get_end_state());
710 tap_set_state(tap_get_end_state());
711 }
712 }
713
714 static void openjtag_execute_runtest(struct jtag_command *cmd)
715 {
716
717 tap_state_t end_state = cmd->cmd.runtest->end_state;
718 tap_set_end_state(end_state);
719
720 /* only do a state_move when we're not already in IDLE */
721 if (tap_get_state() != TAP_IDLE) {
722 openjtag_set_state(TAP_IDLE);
723 tap_set_state(TAP_IDLE);
724 }
725
726 if (cmd->cmd.runtest->num_cycles > 16)
727 LOG_WARNING("num_cycles > 16 on run test");
728
729 uint8_t command;
730 command = 7;
731 command |= ((cmd->cmd.runtest->num_cycles - 1) & 0x0F) << 4;
732
733 openjtag_add_byte(command);
734
735 tap_set_end_state(end_state);
736 if (tap_get_end_state() != tap_get_state()) {
737 openjtag_set_state(end_state);
738 tap_set_state(end_state);
739 }
740 }
741
742 static void openjtag_execute_command(struct jtag_command *cmd)
743 {
744 DEBUG_JTAG_IO("openjtag_execute_command %i", cmd->type);
745 switch (cmd->type) {
746 case JTAG_RESET:
747 openjtag_execute_reset(cmd);
748 break;
749 case JTAG_SLEEP:
750 openjtag_execute_sleep(cmd);
751 break;
752 case JTAG_TLR_RESET:
753 openjtag_execute_statemove(cmd);
754 break;
755 case JTAG_SCAN:
756 openjtag_execute_scan(cmd);
757 break;
758 case JTAG_RUNTEST:
759 openjtag_execute_runtest(cmd);
760 break;
761 case JTAG_PATHMOVE:
762 /* jlink_execute_pathmove(cmd); break; */
763 default:
764 LOG_ERROR("BUG: unknown Open JTAG command type encountered");
765 exit(-1);
766 }
767 }
768
769 static int openjtag_execute_queue(void)
770 {
771 struct jtag_command *cmd = jtag_command_queue;
772
773 while (cmd != NULL) {
774 openjtag_execute_command(cmd);
775 cmd = cmd->next;
776 }
777
778 return openjtag_execute_tap_queue();
779 }
780
781 static int openjtag_speed_div(int speed, int *khz)
782 {
783 *khz = speed;
784
785 return ERROR_OK;
786 }
787
788 static int openjtag_khz(int khz, int *jtag_speed)
789 {
790
791 if (khz >= 48000)
792 *jtag_speed = 48000;
793 else if (khz >= 24000)
794 *jtag_speed = 24000;
795 else if (khz >= 12000)
796 *jtag_speed = 12000;
797 else if (khz >= 6000)
798 *jtag_speed = 6000;
799 else if (khz >= 3000)
800 *jtag_speed = 3000;
801 else if (khz >= 1500)
802 *jtag_speed = 1500;
803 else if (khz >= 750)
804 *jtag_speed = 750;
805 else
806 *jtag_speed = 375;
807
808 return ERROR_OK;
809 }
810
811 COMMAND_HANDLER(openjtag_handle_device_desc_command)
812 {
813 if (CMD_ARGC == 1)
814 openjtag_device_desc = strdup(CMD_ARGV[0]);
815 else
816 LOG_ERROR("require exactly one argument to "
817 "openjtag_device_desc <description>");
818 return ERROR_OK;
819 }
820
821
822 static const struct command_registration openjtag_command_handlers[] = {
823 {
824 .name = "openjtag_device_desc",
825 .handler = openjtag_handle_device_desc_command,
826 .mode = COMMAND_CONFIG,
827 .help = "set the USB device description of the OpenJTAG",
828 .usage = "description-string",
829 },
830 COMMAND_REGISTRATION_DONE
831 };
832
833 struct jtag_interface openjtag_interface = {
834 .name = "openjtag",
835 .commands = openjtag_command_handlers,
836
837 .execute_queue = openjtag_execute_queue,
838 .speed = openjtag_speed,
839 .speed_div = openjtag_speed_div,
840 .khz = openjtag_khz,
841 .init = openjtag_init,
842 .quit = openjtag_quit,
843 };
844
845
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