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build: cleanup src/jtag/drivers directory
[openocd.git] / src / jtag / drivers / jlink.c
blob35c1a5c4b6dee2086c45a98c18626c97451a5466
1 /***************************************************************************
2 * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
3 * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
4 * *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * Copyright (C) 2011 by Jean-Christophe PLAGNIOL-VIILARD *
9 * plagnioj@jcrosoft.com *
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
20 * *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <jtag/interface.h>
32 #include <jtag/commands.h>
33 #include "libusb_common.h"
34
35 /* See Segger's public documentation:
36 * Reference manual for J-Link USB Protocol
37 * Document RM08001-R6 Date: June 16, 2009
38 * (Or newer, with some SWD information).
39 * http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
40 */
41
42 /*
43 * The default pid of the segger is 0x0101
44 * But when you change the USB Address it will also
45 *
46 * pid = ( usb_address > 0x4) ? 0x0101 : (0x101 + usb_address)
47 */
48
49 #define VID 0x1366, 0x1366, 0x1366, 0x1366
50 #define PID 0x0101, 0x0102, 0x0103, 0x0104
51
52 #define JLINK_WRITE_ENDPOINT 0x02
53 #define JLINK_READ_ENDPOINT 0x81
54
55 static unsigned int jlink_write_ep = JLINK_WRITE_ENDPOINT;
56 static unsigned int jlink_read_ep = JLINK_READ_ENDPOINT;
57 static unsigned int jlink_hw_jtag_version = 2;
58
59 #define JLINK_USB_TIMEOUT 1000
60
61 /* See Section 3.3.2 of the Segger JLink USB protocol manual */
62 /* 2048 is the max value we can use here */
63 #define JLINK_TAP_BUFFER_SIZE 2048
64 /*#define JLINK_TAP_BUFFER_SIZE 256*/
65 /*#define JLINK_TAP_BUFFER_SIZE 384*/
66
67 #define JLINK_IN_BUFFER_SIZE 2048
68 #define JLINK_OUT_BUFFER_SIZE (2*2048 + 4)
69 #define JLINK_EMU_RESULT_BUFFER_SIZE 64
70
71 /* Global USB buffers */
72 static uint8_t usb_in_buffer[JLINK_IN_BUFFER_SIZE];
73 static uint8_t usb_out_buffer[JLINK_OUT_BUFFER_SIZE];
74 static uint8_t usb_emu_result_buffer[JLINK_EMU_RESULT_BUFFER_SIZE];
75
76 /* Constants for JLink command */
77 #define EMU_CMD_VERSION 0x01
78 #define EMU_CMD_SET_SPEED 0x05
79 #define EMU_CMD_GET_STATE 0x07
80 #define EMU_CMD_HW_CLOCK 0xc8
81 #define EMU_CMD_HW_TMS0 0xc9
82 #define EMU_CMD_HW_TMS1 0xca
83 #define EMU_CMD_HW_JTAG2 0xce
84 #define EMU_CMD_HW_JTAG3 0xcf
85 #define EMU_CMD_GET_MAX_MEM_BLOCK 0xd4
86 #define EMU_CMD_HW_RESET0 0xdc
87 #define EMU_CMD_HW_RESET1 0xdd
88 #define EMU_CMD_HW_TRST0 0xde
89 #define EMU_CMD_HW_TRST1 0xdf
90 #define EMU_CMD_GET_CAPS 0xe8
91 #define EMU_CMD_GET_HW_VERSION 0xf0
92 #define EMU_CMD_READ_CONFIG 0xf2
93 #define EMU_CMD_WRITE_CONFIG 0xf3
94
95 /* bits return from EMU_CMD_GET_CAPS */
96 #define EMU_CAP_RESERVED_1 0
97 #define EMU_CAP_GET_HW_VERSION 1
98 #define EMU_CAP_WRITE_DCC 2
99 #define EMU_CAP_ADAPTIVE_CLOCKING 3
100 #define EMU_CAP_READ_CONFIG 4
101 #define EMU_CAP_WRITE_CONFIG 5
102 #define EMU_CAP_TRACE 6
103 #define EMU_CAP_WRITE_MEM 7
104 #define EMU_CAP_READ_MEM 8
105 #define EMU_CAP_SPEED_INFO 9
106 #define EMU_CAP_EXEC_CODE 10
107 #define EMU_CAP_GET_MAX_BLOCK_SIZE 11
108 #define EMU_CAP_GET_HW_INFO 12
109 #define EMU_CAP_SET_KS_POWER 13
110 #define EMU_CAP_RESET_STOP_TIMED 14
111 #define EMU_CAP_RESERVED_2 15
112 #define EMU_CAP_MEASURE_RTCK_REACT 16
113 #define EMU_CAP_SELECT_IF 17
114 #define EMU_CAP_RW_MEM_ARM79 18
115 #define EMU_CAP_GET_COUNTERS 19
116 #define EMU_CAP_READ_DCC 20
117 #define EMU_CAP_GET_CPU_CAPS 21
118 #define EMU_CAP_EXEC_CPU_CMD 22
119 #define EMU_CAP_SWO 23
120 #define EMU_CAP_WRITE_DCC_EX 24
121 #define EMU_CAP_UPDATE_FIRMWARE_EX 25
122 #define EMU_CAP_FILE_IO 26
123 #define EMU_CAP_REGISTER 27
124 #define EMU_CAP_INDICATORS 28
125 #define EMU_CAP_TEST_NET_SPEED 29
126 #define EMU_CAP_RAWTRACE 30
127 #define EMU_CAP_RESERVED_3 31
128
129 static char *jlink_cap_str[] = {
130 "Always 1.",
131 "Supports command EMU_CMD_GET_HARDWARE_VERSION",
132 "Supports command EMU_CMD_WRITE_DCC",
133 "Supports adaptive clocking",
134 "Supports command EMU_CMD_READ_CONFIG",
135 "Supports command EMU_CMD_WRITE_CONFIG",
136 "Supports trace commands",
137 "Supports command EMU_CMD_WRITE_MEM",
138 "Supports command EMU_CMD_READ_MEM",
139 "Supports command EMU_CMD_GET_SPEED",
140 "Supports command EMU_CMD_CODE_...",
141 "Supports command EMU_CMD_GET_MAX_BLOCK_SIZE",
142 "Supports command EMU_CMD_GET_HW_INFO",
143 "Supports command EMU_CMD_SET_KS_POWER",
144 "Supports command EMU_CMD_HW_RELEASE_RESET_STOP_TIMED",
145 "Reserved",
146 "Supports command EMU_CMD_MEASURE_RTCK_REACT",
147 "Supports command EMU_CMD_HW_SELECT_IF",
148 "Supports command EMU_CMD_READ/WRITE_MEM_ARM79",
149 "Supports command EMU_CMD_GET_COUNTERS",
150 "Supports command EMU_CMD_READ_DCC",
151 "Supports command EMU_CMD_GET_CPU_CAPS",
152 "Supports command EMU_CMD_EXEC_CPU_CMD",
153 "Supports command EMU_CMD_SWO",
154 "Supports command EMU_CMD_WRITE_DCC_EX",
155 "Supports command EMU_CMD_UPDATE_FIRMWARE_EX",
156 "Supports command EMU_CMD_FILE_IO",
157 "Supports command EMU_CMD_REGISTER",
158 "Supports command EMU_CMD_INDICATORS",
159 "Supports command EMU_CMD_TEST_NET_SPEED",
160 "Supports command EMU_CMD_RAWTRACE",
161 "Reserved",
162 };
163
164 /* max speed 12MHz v5.0 jlink */
165 #define JLINK_MAX_SPEED 12000
166
167 /* J-Link hardware versions */
168 #define JLINK_HW_TYPE_JLINK 0
169 #define JLINK_HW_TYPE_JTRACE 1
170 #define JLINK_HW_TYPE_FLASHER 2
171 #define JLINK_HW_TYPE_JLINK_PRO 3
172 #define JLINK_HW_TYPE_MAX 4
173
174 static char *jlink_hw_type_str[] = {
175 "J-Link",
176 "J-Trace",
177 "Flasher",
178 "J-Link Pro",
179 };
180
181 /* Queue command functions */
182 static void jlink_end_state(tap_state_t state);
183 static void jlink_state_move(void);
184 static void jlink_path_move(int num_states, tap_state_t *path);
185 static void jlink_runtest(int num_cycles);
186 static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
187 int scan_size, struct scan_command *command);
188 static void jlink_reset(int trst, int srst);
189 static void jlink_simple_command(uint8_t command);
190 static int jlink_get_status(void);
191
192 /* J-Link tap buffer functions */
193 static void jlink_tap_init(void);
194 static int jlink_tap_execute(void);
195 static void jlink_tap_ensure_space(int scans, int bits);
196 static void jlink_tap_append_step(int tms, int tdi);
197 static void jlink_tap_append_scan(int length, uint8_t *buffer,
198 struct scan_command *command);
199
200 /* Jlink lowlevel functions */
201 struct jlink {
202 struct jtag_libusb_device_handle *usb_handle;
203 };
204
205 static struct jlink *jlink_usb_open(void);
206 static void jlink_usb_close(struct jlink *jlink);
207 static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length);
208 static int jlink_usb_write(struct jlink *jlink, int out_length);
209 static int jlink_usb_read(struct jlink *jlink, int expected_size);
210 static int jlink_usb_read_emu_result(struct jlink *jlink);
211
212 /* helper functions */
213 static int jlink_get_version_info(void);
214
215 #ifdef _DEBUG_USB_COMMS_
216 static void jlink_debug_buffer(uint8_t *buffer, int length);
217 #else
218 static inline void jlink_debug_buffer(uint8_t *buffer, int length)
219 {
220 }
221 #endif
222
223 static enum tap_state jlink_last_state = TAP_RESET;
224
225 static struct jlink *jlink_handle;
226
227 /* pid could be specified at runtime */
228 static uint16_t vids[] = { VID, 0 };
229 static uint16_t pids[] = { PID, 0 };
230
231 static uint32_t jlink_caps;
232 static uint32_t jlink_hw_type;
233
234 /* 256 byte non-volatile memory */
235 struct jlink_config {
236 uint8_t usb_address;
237 /* 0ffset 0x01 to 0x03 */
238 uint8_t reserved_1[3];
239 uint32_t kickstart_power_on_jtag_pin_19;
240 /* 0ffset 0x08 to 0x1f */
241 uint8_t reserved_2[24];
242 /* IP only for J-Link Pro */
243 uint8_t ip_address[4];
244 uint8_t subnet_mask[4];
245 /* 0ffset 0x28 to 0x2f */
246 uint8_t reserved_3[8];
247 uint8_t mac_address[6];
248 /* 0ffset 0x36 to 0xff */
249 uint8_t reserved_4[202];
250 } __attribute__ ((packed));
251 struct jlink_config jlink_cfg;
252
253 /***************************************************************************/
254 /* External interface implementation */
255
256 static void jlink_execute_runtest(struct jtag_command *cmd)
257 {
258 DEBUG_JTAG_IO("runtest %i cycles, end in %i",
259 cmd->cmd.runtest->num_cycles,
260 cmd->cmd.runtest->end_state);
261
262 jlink_end_state(cmd->cmd.runtest->end_state);
263
264 jlink_runtest(cmd->cmd.runtest->num_cycles);
265 }
266
267 static void jlink_execute_statemove(struct jtag_command *cmd)
268 {
269 DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
270
271 jlink_end_state(cmd->cmd.statemove->end_state);
272 jlink_state_move();
273 }
274
275 static void jlink_execute_pathmove(struct jtag_command *cmd)
276 {
277 DEBUG_JTAG_IO("pathmove: %i states, end in %i",
278 cmd->cmd.pathmove->num_states,
279 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
280
281 jlink_path_move(cmd->cmd.pathmove->num_states,
282 cmd->cmd.pathmove->path);
283 }
284
285 static void jlink_execute_scan(struct jtag_command *cmd)
286 {
287 int scan_size;
288 enum scan_type type;
289 uint8_t *buffer;
290
291 DEBUG_JTAG_IO("scan end in %s", tap_state_name(cmd->cmd.scan->end_state));
292
293 jlink_end_state(cmd->cmd.scan->end_state);
294
295 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
296 DEBUG_JTAG_IO("scan input, length = %d", scan_size);
297
298 jlink_debug_buffer(buffer, (scan_size + 7) / 8);
299 type = jtag_scan_type(cmd->cmd.scan);
300 jlink_scan(cmd->cmd.scan->ir_scan,
301 type, buffer, scan_size, cmd->cmd.scan);
302 }
303
304 static void jlink_execute_reset(struct jtag_command *cmd)
305 {
306 DEBUG_JTAG_IO("reset trst: %i srst %i",
307 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
308
309 jlink_tap_execute();
310 jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
311 jlink_tap_execute();
312 }
313
314 static void jlink_execute_sleep(struct jtag_command *cmd)
315 {
316 DEBUG_JTAG_IO("sleep %" PRIi32 "", cmd->cmd.sleep->us);
317 jlink_tap_execute();
318 jtag_sleep(cmd->cmd.sleep->us);
319 }
320
321 static void jlink_execute_command(struct jtag_command *cmd)
322 {
323 switch (cmd->type) {
324 case JTAG_RUNTEST:
325 jlink_execute_runtest(cmd);
326 break;
327 case JTAG_TLR_RESET:
328 jlink_execute_statemove(cmd);
329 break;
330 case JTAG_PATHMOVE:
331 jlink_execute_pathmove(cmd);
332 break;
333 case JTAG_SCAN:
334 jlink_execute_scan(cmd);
335 break;
336 case JTAG_RESET:
337 jlink_execute_reset(cmd);
338 break;
339 case JTAG_SLEEP:
340 jlink_execute_sleep(cmd);
341 break;
342 default:
343 LOG_ERROR("BUG: unknown JTAG command type encountered");
344 exit(-1);
345 }
346 }
347
348 static int jlink_execute_queue(void)
349 {
350 struct jtag_command *cmd = jtag_command_queue;
351
352 while (cmd != NULL) {
353 jlink_execute_command(cmd);
354 cmd = cmd->next;
355 }
356
357 return jlink_tap_execute();
358 }
359
360 /* Sets speed in kHz. */
361 static int jlink_speed(int speed)
362 {
363 int result;
364
365 if (speed > JLINK_MAX_SPEED) {
366 LOG_INFO("reduce speed request: %dkHz to %dkHz maximum",
367 speed, JLINK_MAX_SPEED);
368 speed = JLINK_MAX_SPEED;
369 }
370
371 /* check for RTCK setting */
372 if (speed == 0)
373 speed = -1;
374
375 usb_out_buffer[0] = EMU_CMD_SET_SPEED;
376 usb_out_buffer[1] = (speed >> 0) & 0xff;
377 usb_out_buffer[2] = (speed >> 8) & 0xff;
378
379 result = jlink_usb_write(jlink_handle, 3);
380 if (result != 3) {
381 LOG_ERROR("J-Link setting speed failed (%d)", result);
382 return ERROR_JTAG_DEVICE_ERROR;
383 }
384
385 return ERROR_OK;
386 }
387
388 static int jlink_speed_div(int speed, int *khz)
389 {
390 *khz = speed;
391
392 return ERROR_OK;
393 }
394
395 static int jlink_khz(int khz, int *jtag_speed)
396 {
397 *jtag_speed = khz;
398
399 return ERROR_OK;
400 }
401
402 static int jlink_init(void)
403 {
404 int i;
405
406 jlink_handle = jlink_usb_open();
407
408 if (jlink_handle == 0) {
409 LOG_ERROR("Cannot find jlink Interface! Please check "
410 "connection and permissions.");
411 return ERROR_JTAG_INIT_FAILED;
412 }
413
414 /*
415 * The next three instructions were added after discovering a problem
416 * while using an oscilloscope.
417 * For the V8 SAM-ICE dongle (and likely other j-link device variants),
418 * the reset line to the target microprocessor was found to cycle only
419 * intermittently during emulator startup (even after encountering the
420 * downstream reset instruction later in the code).
421 * This was found to create two issues:
422 * 1) In general it is a bad practice to not reset a CPU to a known
423 * state when starting an emulator and
424 * 2) something critical happens inside the dongle when it does the
425 * first read following a new USB session.
426 * Keeping the processor in reset during the first read collecting
427 * version information seems to prevent errant
428 * "J-Link command EMU_CMD_VERSION failed" issues.
429 */
430
431 LOG_INFO("J-Link initialization started / target CPU reset initiated");
432 jlink_simple_command(EMU_CMD_HW_TRST0);
433 jlink_simple_command(EMU_CMD_HW_RESET0);
434 usleep(1000);
435
436 jlink_hw_jtag_version = 2;
437
438 if (jlink_get_version_info() == ERROR_OK) {
439 /* attempt to get status */
440 jlink_get_status();
441 }
442
443 LOG_INFO("J-Link JTAG Interface ready");
444
445 jlink_reset(0, 0);
446 jtag_sleep(3000);
447 jlink_tap_init();
448
449 /* v5/6 jlink seems to have an issue if the first tap move
450 * is not divisible by 8, so we send a TLR on first power up */
451 for (i = 0; i < 8; i++)
452 jlink_tap_append_step(1, 0);
453 jlink_tap_execute();
454
455 return ERROR_OK;
456 }
457
458 static int jlink_quit(void)
459 {
460 jlink_usb_close(jlink_handle);
461 return ERROR_OK;
462 }
463
464 /***************************************************************************/
465 /* Queue command implementations */
466
467 static void jlink_end_state(tap_state_t state)
468 {
469 if (tap_is_state_stable(state))
470 tap_set_end_state(state);
471 else {
472 LOG_ERROR("BUG: %i is not a valid end state", state);
473 exit(-1);
474 }
475 }
476
477 /* Goes to the end state. */
478 static void jlink_state_move(void)
479 {
480 int i;
481 int tms = 0;
482 uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
483 uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
484
485 for (i = 0; i < tms_scan_bits; i++) {
486 tms = (tms_scan >> i) & 1;
487 jlink_tap_append_step(tms, 0);
488 }
489
490 tap_set_state(tap_get_end_state());
491 }
492
493 static void jlink_path_move(int num_states, tap_state_t *path)
494 {
495 int i;
496
497 for (i = 0; i < num_states; i++) {
498 if (path[i] == tap_state_transition(tap_get_state(), false))
499 jlink_tap_append_step(0, 0);
500 else if (path[i] == tap_state_transition(tap_get_state(), true))
501 jlink_tap_append_step(1, 0);
502 else {
503 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
504 tap_state_name(tap_get_state()), tap_state_name(path[i]));
505 exit(-1);
506 }
507
508 tap_set_state(path[i]);
509 }
510
511 tap_set_end_state(tap_get_state());
512 }
513
514 static void jlink_runtest(int num_cycles)
515 {
516 int i;
517
518 tap_state_t saved_end_state = tap_get_end_state();
519
520 jlink_tap_ensure_space(1, num_cycles + 16);
521
522 /* only do a state_move when we're not already in IDLE */
523 if (tap_get_state() != TAP_IDLE) {
524 jlink_end_state(TAP_IDLE);
525 jlink_state_move();
526 /* num_cycles--; */
527 }
528
529 /* execute num_cycles */
530 for (i = 0; i < num_cycles; i++)
531 jlink_tap_append_step(0, 0);
532
533 /* finish in end_state */
534 jlink_end_state(saved_end_state);
535 if (tap_get_state() != tap_get_end_state())
536 jlink_state_move();
537 }
538
539 static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
540 int scan_size, struct scan_command *command)
541 {
542 tap_state_t saved_end_state;
543
544 jlink_tap_ensure_space(1, scan_size + 16);
545
546 saved_end_state = tap_get_end_state();
547
548 /* Move to appropriate scan state */
549 jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
550
551 /* Only move if we're not already there */
552 if (tap_get_state() != tap_get_end_state())
553 jlink_state_move();
554
555 jlink_end_state(saved_end_state);
556
557 /* Scan */
558 jlink_tap_append_scan(scan_size, buffer, command);
559
560 /* We are in Exit1, go to Pause */
561 jlink_tap_append_step(0, 0);
562
563 tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
564
565 if (tap_get_state() != tap_get_end_state())
566 jlink_state_move();
567 }
568
569 static void jlink_reset(int trst, int srst)
570 {
571 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
572
573 /* Signals are active low */
574 if (srst == 0)
575 jlink_simple_command(EMU_CMD_HW_RESET1);
576
577 if (srst == 1)
578 jlink_simple_command(EMU_CMD_HW_RESET0);
579
580 if (trst == 1)
581 jlink_simple_command(EMU_CMD_HW_TRST0);
582
583 if (trst == 0)
584 jlink_simple_command(EMU_CMD_HW_TRST1);
585 }
586
587 static void jlink_simple_command(uint8_t command)
588 {
589 int result;
590
591 DEBUG_JTAG_IO("0x%02x", command);
592
593 usb_out_buffer[0] = command;
594 result = jlink_usb_write(jlink_handle, 1);
595
596 if (result != 1)
597 LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
598 }
599
600 static int jlink_get_status(void)
601 {
602 int result;
603
604 jlink_simple_command(EMU_CMD_GET_STATE);
605
606 result = jlink_usb_read(jlink_handle, 8);
607 if (result != 8) {
608 LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result);
609 return ERROR_JTAG_DEVICE_ERROR;
610 }
611
612 int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
613 LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
614 vref / 1000, vref % 1000, \
615 usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
616 usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
617
618 if (vref < 1500)
619 LOG_ERROR("Vref too low. Check Target Power");
620
621 return ERROR_OK;
622 }
623
624 #define jlink_dump_printf(context, expr ...) \
625 do { \
626 if (context) \
627 command_print(context, expr); \
628 else \
629 LOG_INFO(expr); \
630 } while (0);
631
632 static void jlink_caps_dump(struct command_context *ctx)
633 {
634 int i;
635
636 jlink_dump_printf(ctx, "J-Link Capabilities");
637
638 for (i = 1; i < 31; i++)
639 if (jlink_caps & (1 << i))
640 jlink_dump_printf(ctx, "%s", jlink_cap_str[i]);
641 }
642
643 static void jlink_config_usb_address_dump(struct command_context *ctx, struct jlink_config *cfg)
644 {
645 if (!cfg)
646 return;
647
648 jlink_dump_printf(ctx, "USB-Address: 0x%x", cfg->usb_address);
649 }
650
651 static void jlink_config_kickstart_dump(struct command_context *ctx, struct jlink_config *cfg)
652 {
653 if (!cfg)
654 return;
655
656 jlink_dump_printf(ctx, "Kickstart power on JTAG-pin 19: 0x%x",
657 cfg->kickstart_power_on_jtag_pin_19);
658 }
659
660 static void jlink_config_mac_address_dump(struct command_context *ctx, struct jlink_config *cfg)
661 {
662 if (!cfg)
663 return;
664
665 jlink_dump_printf(ctx, "MAC Address: %.02x:%.02x:%.02x:%.02x:%.02x:%.02x",
666 cfg->mac_address[5], cfg->mac_address[4],
667 cfg->mac_address[3], cfg->mac_address[2],
668 cfg->mac_address[1], cfg->mac_address[0]);
669 }
670
671 static void jlink_config_ip_dump(struct command_context *ctx, struct jlink_config *cfg)
672 {
673 if (!cfg)
674 return;
675
676 jlink_dump_printf(ctx, "IP Address: %d.%d.%d.%d",
677 cfg->ip_address[3], cfg->ip_address[2],
678 cfg->ip_address[1], cfg->ip_address[0]);
679 jlink_dump_printf(ctx, "Subnet Mask: %d.%d.%d.%d",
680 cfg->subnet_mask[3], cfg->subnet_mask[2],
681 cfg->subnet_mask[1], cfg->subnet_mask[0]);
682 }
683
684 static void jlink_config_dump(struct command_context *ctx, struct jlink_config *cfg)
685 {
686 if (!cfg)
687 return;
688
689 jlink_dump_printf(ctx, "J-Link configuration");
690 jlink_config_usb_address_dump(ctx, cfg);
691 jlink_config_kickstart_dump(ctx, cfg);
692
693 if (jlink_hw_type == JLINK_HW_TYPE_JLINK_PRO) {
694 jlink_config_ip_dump(ctx, cfg);
695 jlink_config_mac_address_dump(ctx, cfg);
696 }
697 }
698
699 static int jlink_get_config(struct jlink_config *cfg)
700 {
701 int result;
702 int size = sizeof(struct jlink_config);
703
704 jlink_simple_command(EMU_CMD_READ_CONFIG);
705
706 result = jlink_usb_read(jlink_handle, size);
707 if (size != result) {
708 LOG_ERROR("jlink_usb_read failed (requested=%d, result=%d)", size, result);
709 return ERROR_FAIL;
710 }
711
712 memcpy(cfg, usb_in_buffer, size);
713
714 /*
715 * Section 4.2.4 IN-transaction
716 * read dummy 0-byte packet
717 */
718 jlink_usb_read(jlink_handle, 1);
719
720 return ERROR_OK;
721 }
722
723 static int jlink_set_config(struct jlink_config *cfg)
724 {
725 int result;
726 int size = sizeof(struct jlink_config);
727
728 jlink_simple_command(EMU_CMD_WRITE_CONFIG);
729
730 memcpy(usb_out_buffer, cfg, size);
731
732 result = jlink_usb_write(jlink_handle, size);
733 if (result != size) {
734 LOG_ERROR("jlink_usb_write failed (requested=%d, result=%d)", 256, result);
735 return ERROR_FAIL;
736 }
737
738 return ERROR_OK;
739 }
740
741 static int jlink_get_version_info(void)
742 {
743 int result;
744 int len;
745 uint32_t jlink_max_size;
746
747 /* query hardware version */
748 jlink_simple_command(EMU_CMD_VERSION);
749
750 result = jlink_usb_read(jlink_handle, 2);
751 if (2 != result) {
752 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
753 return ERROR_JTAG_DEVICE_ERROR;
754 }
755
756 len = buf_get_u32(usb_in_buffer, 0, 16);
757 if (len > JLINK_IN_BUFFER_SIZE) {
758 LOG_ERROR("J-Link command EMU_CMD_VERSION impossible return length 0x%0x", len);
759 len = JLINK_IN_BUFFER_SIZE;
760 }
761
762 result = jlink_usb_read(jlink_handle, len);
763 if (result != len) {
764 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
765 return ERROR_JTAG_DEVICE_ERROR;
766 }
767
768 usb_in_buffer[result] = 0;
769 LOG_INFO("%s", (char *)usb_in_buffer);
770
771 /* query hardware capabilities */
772 jlink_simple_command(EMU_CMD_GET_CAPS);
773
774 result = jlink_usb_read(jlink_handle, 4);
775 if (4 != result) {
776 LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result);
777 return ERROR_JTAG_DEVICE_ERROR;
778 }
779
780 jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
781 LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps);
782
783 if (jlink_caps & (1 << EMU_CAP_GET_HW_VERSION)) {
784 /* query hardware version */
785 jlink_simple_command(EMU_CMD_GET_HW_VERSION);
786
787 result = jlink_usb_read(jlink_handle, 4);
788 if (4 != result) {
789 LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result);
790 return ERROR_JTAG_DEVICE_ERROR;
791 }
792
793 uint32_t jlink_hw_version = buf_get_u32(usb_in_buffer, 0, 32);
794 uint32_t major_revision = (jlink_hw_version / 10000) % 100;
795 jlink_hw_type = (jlink_hw_version / 1000000) % 100;
796 if (major_revision >= 5)
797 jlink_hw_jtag_version = 3;
798
799 LOG_INFO("J-Link hw version %i", (int)jlink_hw_version);
800
801 if (jlink_hw_type >= JLINK_HW_TYPE_MAX)
802 LOG_INFO("J-Link hw type uknown 0x%x", jlink_hw_type);
803 else
804 LOG_INFO("J-Link hw type %s", jlink_hw_type_str[jlink_hw_type]);
805 }
806
807 if (jlink_caps & (1 << EMU_CAP_GET_MAX_BLOCK_SIZE)) {
808 /* query hardware maximum memory block */
809 jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK);
810
811 result = jlink_usb_read(jlink_handle, 4);
812 if (4 != result) {
813 LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result);
814 return ERROR_JTAG_DEVICE_ERROR;
815 }
816
817 jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
818 LOG_INFO("J-Link max mem block %i", (int)jlink_max_size);
819 }
820
821 if (jlink_caps & (1 << EMU_CAP_READ_CONFIG)) {
822 if (jlink_get_config(&jlink_cfg) != ERROR_OK)
823 return ERROR_JTAG_DEVICE_ERROR;
824
825 jlink_config_dump(NULL, &jlink_cfg);
826 }
827
828 return ERROR_OK;
829 }
830
831 COMMAND_HANDLER(jlink_pid_command)
832 {
833 if (CMD_ARGC != 1) {
834 LOG_ERROR("Need exactly one argument to jlink_pid");
835 return ERROR_FAIL;
836 }
837
838 pids[0] = strtoul(CMD_ARGV[0], NULL, 16);
839 pids[1] = 0;
840 vids[1] = 0;
841
842 return ERROR_OK;
843 }
844
845 COMMAND_HANDLER(jlink_handle_jlink_info_command)
846 {
847 if (jlink_get_version_info() == ERROR_OK) {
848 /* attempt to get status */
849 jlink_get_status();
850 }
851
852 return ERROR_OK;
853 }
854
855 COMMAND_HANDLER(jlink_handle_jlink_caps_command)
856 {
857 jlink_caps_dump(CMD_CTX);
858
859 return ERROR_OK;
860 }
861
862 COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command)
863 {
864 switch (CMD_ARGC) {
865 case 0:
866 command_print(CMD_CTX, "J-Link hw jtag %i", jlink_hw_jtag_version);
867 break;
868 case 1: {
869 int request_version = atoi(CMD_ARGV[0]);
870 switch (request_version) {
871 case 2:
872 case 3:
873 jlink_hw_jtag_version = request_version;
874 break;
875 default:
876 return ERROR_COMMAND_SYNTAX_ERROR;
877 }
878 break;
879 }
880 default:
881 return ERROR_COMMAND_SYNTAX_ERROR;
882 }
883
884 return ERROR_OK;
885 }
886
887 COMMAND_HANDLER(jlink_handle_jlink_kickstart_command)
888 {
889 uint32_t kickstart;
890
891 if (CMD_ARGC < 1) {
892 jlink_config_kickstart_dump(CMD_CTX, &jlink_cfg);
893 return ERROR_OK;
894 }
895
896 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], kickstart);
897
898 jlink_cfg.kickstart_power_on_jtag_pin_19 = kickstart;
899 return ERROR_OK;
900 }
901
902 COMMAND_HANDLER(jlink_handle_jlink_mac_address_command)
903 {
904 uint8_t addr[6];
905 int i;
906 char *e;
907 const char *str;
908
909 if (CMD_ARGC < 1) {
910 jlink_config_mac_address_dump(CMD_CTX, &jlink_cfg);
911 return ERROR_OK;
912 }
913
914 str = CMD_ARGV[0];
915
916 if ((strlen(str) != 17) || (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
917 str[11] != ':' || str[14] != ':')) {
918 command_print(CMD_CTX, "ethaddr miss format ff:ff:ff:ff:ff:ff");
919 return ERROR_COMMAND_SYNTAX_ERROR;
920 }
921
922 for (i = 5; i >= 0; i--) {
923 addr[i] = strtoul(str, &e, 16);
924 str = e + 1;
925 }
926
927 if (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5])) {
928 command_print(CMD_CTX, "invalid it's zero mac_address");
929 return ERROR_COMMAND_SYNTAX_ERROR;
930 }
931
932 if (!(0x01 & addr[0])) {
933 command_print(CMD_CTX, "invalid it's a multicat mac_address");
934 return ERROR_COMMAND_SYNTAX_ERROR;
935 }
936
937 memcpy(jlink_cfg.mac_address, addr, sizeof(addr));
938
939 return ERROR_OK;
940 }
941
942 static int string_to_ip(const char *s, uint8_t *ip, int *pos)
943 {
944 uint8_t lip[4];
945 char *e;
946 const char *s_save = s;
947 int i;
948
949 if (!s)
950 return -EINVAL;
951
952 for (i = 0; i < 4; i++) {
953 lip[i] = strtoul(s, &e, 10);
954
955 if (*e != '.' && i != 3)
956 return -EINVAL;
957
958 s = e + 1;
959 }
960
961 *pos = e - s_save;
962
963 memcpy(ip, lip, sizeof(lip));
964 return ERROR_OK;
965 }
966
967 static void cpy_ip(uint8_t *dst, uint8_t *src)
968 {
969 int i, j;
970
971 for (i = 0, j = 3; i < 4; i++, j--)
972 dst[i] = src[j];
973 }
974
975 COMMAND_HANDLER(jlink_handle_jlink_ip_command)
976 {
977 uint32_t ip_address;
978 uint32_t subnet_mask = 0;
979 int i, len;
980 int ret;
981 uint8_t subnet_bits = 24;
982
983 if (CMD_ARGC < 1) {
984 jlink_config_ip_dump(CMD_CTX, &jlink_cfg);
985 return ERROR_OK;
986 }
987
988 ret = string_to_ip(CMD_ARGV[0], (uint8_t *)&ip_address, &i);
989 if (ret != ERROR_OK)
990 return ret;
991
992 len = strlen(CMD_ARGV[0]);
993
994 /* check for this format A.B.C.D/E */
995
996 if (i < len) {
997 if (CMD_ARGV[0][i] != '/')
998 return ERROR_COMMAND_SYNTAX_ERROR;
999
1000 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0] + i + 1, subnet_bits);
1001 } else {
1002 if (CMD_ARGC > 1) {
1003 ret = string_to_ip(CMD_ARGV[1], (uint8_t *)&subnet_mask, &i);
1004 if (ret != ERROR_OK)
1005 return ret;
1006 }
1007 }
1008
1009 if (!subnet_mask)
1010 subnet_mask = (uint32_t)(subnet_bits < 32 ?
1011 ((1ULL << subnet_bits) - 1) : 0xffffffff);
1012
1013 cpy_ip(jlink_cfg.ip_address, (uint8_t *)&ip_address);
1014 cpy_ip(jlink_cfg.subnet_mask, (uint8_t *)&subnet_mask);
1015
1016 return ERROR_OK;
1017 }
1018
1019 COMMAND_HANDLER(jlink_handle_jlink_reset_command)
1020 {
1021 memset(&jlink_cfg, 0xff, sizeof(jlink_cfg));
1022 return ERROR_OK;
1023 }
1024
1025 COMMAND_HANDLER(jlink_handle_jlink_save_command)
1026 {
1027 if (!(jlink_caps & (1 << EMU_CAP_WRITE_CONFIG))) {
1028 command_print(CMD_CTX, "J-Link write emulator configuration not supported");
1029 return ERROR_OK;
1030 }
1031
1032 command_print(CMD_CTX, "The J-Link need to be unpluged and repluged ta have the config effective");
1033 return jlink_set_config(&jlink_cfg);
1034 }
1035
1036 COMMAND_HANDLER(jlink_handle_jlink_usb_address_command)
1037 {
1038 uint32_t address;
1039
1040 if (CMD_ARGC < 1) {
1041 jlink_config_usb_address_dump(CMD_CTX, &jlink_cfg);
1042 return ERROR_OK;
1043 }
1044
1045 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
1046
1047 if (address > 0x3 && address != 0xff) {
1048 command_print(CMD_CTX, "USB Address must be between 0x00 and 0x03 or 0xff");
1049 return ERROR_COMMAND_SYNTAX_ERROR;
1050 }
1051
1052 jlink_cfg.usb_address = address;
1053 return ERROR_OK;
1054 }
1055
1056 COMMAND_HANDLER(jlink_handle_jlink_config_command)
1057 {
1058 struct jlink_config cfg;
1059 int ret = ERROR_OK;
1060
1061 if (CMD_ARGC == 0) {
1062 if (!(jlink_caps & (1 << EMU_CAP_READ_CONFIG))) {
1063 command_print(CMD_CTX, "J-Link read emulator configuration not supported");
1064 goto exit;
1065 }
1066
1067 ret = jlink_get_config(&cfg);
1068
1069 if (ret != ERROR_OK)
1070 command_print(CMD_CTX, "J-Link read emulator configuration failled");
1071 else
1072 jlink_config_dump(CMD_CTX, &jlink_cfg);
1073 }
1074
1075 exit:
1076 return ret;
1077 }
1078
1079 static const struct command_registration jlink_config_subcommand_handlers[] = {
1080 {
1081 .name = "kickstart",
1082 .handler = &jlink_handle_jlink_kickstart_command,
1083 .mode = COMMAND_EXEC,
1084 .help = "set Kickstart power on JTAG-pin 19.",
1085 .usage = "[val]",
1086 },
1087 {
1088 .name = "mac_address",
1089 .handler = &jlink_handle_jlink_mac_address_command,
1090 .mode = COMMAND_EXEC,
1091 .help = "set the MAC Address",
1092 .usage = "[ff:ff:ff:ff:ff:ff]",
1093 },
1094 {
1095 .name = "ip",
1096 .handler = &jlink_handle_jlink_ip_command,
1097 .mode = COMMAND_EXEC,
1098 .help = "set the ip address of the J-Link Pro, "
1099 "where A.B.C.D is the ip, "
1100 "E the bit of the subnet mask, "
1101 "F.G.H.I the subnet mask",
1102 .usage = "[A.B.C.D[/E] [F.G.H.I]]",
1103 },
1104 {
1105 .name = "reset",
1106 .handler = &jlink_handle_jlink_reset_command,
1107 .mode = COMMAND_EXEC,
1108 .help = "reset the current config",
1109 },
1110 {
1111 .name = "save",
1112 .handler = &jlink_handle_jlink_save_command,
1113 .mode = COMMAND_EXEC,
1114 .help = "save the current config",
1115 },
1116 {
1117 .name = "usb_address",
1118 .handler = &jlink_handle_jlink_usb_address_command,
1119 .mode = COMMAND_EXEC,
1120 .help = "set the USB-Address, "
1121 "This will change the product id",
1122 .usage = "[0x00 to 0x03 or 0xff]",
1123 },
1124 COMMAND_REGISTRATION_DONE
1125 };
1126
1127 static const struct command_registration jlink_subcommand_handlers[] = {
1128 {
1129 .name = "caps",
1130 .handler = &jlink_handle_jlink_caps_command,
1131 .mode = COMMAND_EXEC,
1132 .help = "show jlink capabilities",
1133 },
1134 {
1135 .name = "info",
1136 .handler = &jlink_handle_jlink_info_command,
1137 .mode = COMMAND_EXEC,
1138 .help = "show jlink info",
1139 },
1140 {
1141 .name = "hw_jtag",
1142 .handler = &jlink_handle_jlink_hw_jtag_command,
1143 .mode = COMMAND_EXEC,
1144 .help = "access J-Link HW JTAG command version",
1145 .usage = "[2|3]",
1146 },
1147 {
1148 .name = "config",
1149 .handler = &jlink_handle_jlink_config_command,
1150 .mode = COMMAND_EXEC,
1151 .help = "access J-Link configuration, "
1152 "if no argument this will dump the config",
1153 .chain = jlink_config_subcommand_handlers,
1154 },
1155 {
1156 .name = "pid",
1157 .handler = &jlink_pid_command,
1158 .mode = COMMAND_CONFIG,
1159 .help = "set the pid of the interface we want to use",
1160 },
1161 COMMAND_REGISTRATION_DONE
1162 };
1163
1164 static const struct command_registration jlink_command_handlers[] = {
1165 {
1166 .name = "jlink",
1167 .mode = COMMAND_ANY,
1168 .help = "perform jlink management",
1169 .chain = jlink_subcommand_handlers,
1170 },
1171 COMMAND_REGISTRATION_DONE
1172 };
1173
1174 struct jtag_interface jlink_interface = {
1175 .name = "jlink",
1176 .commands = jlink_command_handlers,
1177
1178 .execute_queue = jlink_execute_queue,
1179 .speed = jlink_speed,
1180 .speed_div = jlink_speed_div,
1181 .khz = jlink_khz,
1182 .init = jlink_init,
1183 .quit = jlink_quit,
1184 };
1185
1186 /***************************************************************************/
1187 /* J-Link tap functions */
1188
1189
1190 static unsigned tap_length;
1191 static uint8_t tms_buffer[JLINK_TAP_BUFFER_SIZE];
1192 static uint8_t tdi_buffer[JLINK_TAP_BUFFER_SIZE];
1193 static uint8_t tdo_buffer[JLINK_TAP_BUFFER_SIZE];
1194
1195 struct pending_scan_result {
1196 int first; /* First bit position in tdo_buffer to read */
1197 int length; /* Number of bits to read */
1198 struct scan_command *command; /* Corresponding scan command */
1199 uint8_t *buffer;
1200 };
1201
1202 #define MAX_PENDING_SCAN_RESULTS 256
1203
1204 static int pending_scan_results_length;
1205 static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
1206
1207 static void jlink_tap_init(void)
1208 {
1209 tap_length = 0;
1210 pending_scan_results_length = 0;
1211 }
1212
1213 static void jlink_tap_ensure_space(int scans, int bits)
1214 {
1215 int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
1216 int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 32;
1217
1218 if (scans > available_scans || bits > available_bits)
1219 jlink_tap_execute();
1220 }
1221
1222 static void jlink_tap_append_step(int tms, int tdi)
1223 {
1224 int index_var = tap_length / 8;
1225
1226 if (index_var >= JLINK_TAP_BUFFER_SIZE) {
1227 LOG_ERROR("jlink_tap_append_step: overflow");
1228 *(uint32_t *)0xFFFFFFFF = 0;
1229 exit(-1);
1230 }
1231
1232 int bit_index = tap_length % 8;
1233 uint8_t bit = 1 << bit_index;
1234
1235 /* we do not pad TMS, so be sure to initialize all bits */
1236 if (0 == bit_index)
1237 tms_buffer[index_var] = tdi_buffer[index_var] = 0;
1238
1239 if (tms)
1240 tms_buffer[index_var] |= bit;
1241 else
1242 tms_buffer[index_var] &= ~bit;
1243
1244 if (tdi)
1245 tdi_buffer[index_var] |= bit;
1246 else
1247 tdi_buffer[index_var] &= ~bit;
1248
1249 tap_length++;
1250 }
1251
1252 static void jlink_tap_append_scan(int length, uint8_t *buffer,
1253 struct scan_command *command)
1254 {
1255 struct pending_scan_result *pending_scan_result =
1256 &pending_scan_results_buffer[pending_scan_results_length];
1257 int i;
1258
1259 pending_scan_result->first = tap_length;
1260 pending_scan_result->length = length;
1261 pending_scan_result->command = command;
1262 pending_scan_result->buffer = buffer;
1263
1264 for (i = 0; i < length; i++) {
1265 int tms = (i < (length - 1)) ? 0 : 1;
1266 int tdi = (buffer[i / 8] & (1 << (i % 8))) != 0;
1267 jlink_tap_append_step(tms, tdi);
1268 }
1269 pending_scan_results_length++;
1270 }
1271
1272 /* Pad and send a tap sequence to the device, and receive the answer.
1273 * For the purpose of padding we assume that we are in idle or pause state. */
1274 static int jlink_tap_execute(void)
1275 {
1276 int byte_length;
1277 int i;
1278 int result;
1279
1280 if (!tap_length)
1281 return ERROR_OK;
1282
1283 /* JLink returns an extra NULL in packet when size of incoming
1284 * message is a multiple of 64, creates problems with USB comms.
1285 * WARNING: This will interfere with tap state counting. */
1286 while ((DIV_ROUND_UP(tap_length, 8) % 64) == 0)
1287 jlink_tap_append_step((tap_get_state() == TAP_RESET) ? 1 : 0, 0);
1288
1289 /* number of full bytes (plus one if some would be left over) */
1290 byte_length = DIV_ROUND_UP(tap_length, 8);
1291
1292 bool use_jtag3 = jlink_hw_jtag_version >= 3;
1293 usb_out_buffer[0] = use_jtag3 ? EMU_CMD_HW_JTAG3 : EMU_CMD_HW_JTAG2;
1294 usb_out_buffer[1] = 0;
1295 usb_out_buffer[2] = (tap_length >> 0) & 0xff;
1296 usb_out_buffer[3] = (tap_length >> 8) & 0xff;
1297 memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
1298 memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
1299
1300 jlink_last_state = jtag_debug_state_machine(tms_buffer, tdi_buffer,
1301 tap_length, jlink_last_state);
1302
1303 result = jlink_usb_message(jlink_handle, 4 + 2 * byte_length, byte_length);
1304 if (result != byte_length) {
1305 LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)",
1306 result, byte_length);
1307 jlink_tap_init();
1308 return ERROR_JTAG_QUEUE_FAILED;
1309 }
1310
1311 memcpy(tdo_buffer, usb_in_buffer, byte_length);
1312
1313 for (i = 0; i < pending_scan_results_length; i++) {
1314 struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i];
1315 uint8_t *buffer = pending_scan_result->buffer;
1316 int length = pending_scan_result->length;
1317 int first = pending_scan_result->first;
1318 struct scan_command *command = pending_scan_result->command;
1319
1320 /* Copy to buffer */
1321 buf_set_buf(tdo_buffer, first, buffer, 0, length);
1322
1323 DEBUG_JTAG_IO("pending scan result, length = %d", length);
1324
1325 jlink_debug_buffer(buffer, DIV_ROUND_UP(length, 8));
1326
1327 if (jtag_read_buffer(buffer, command) != ERROR_OK) {
1328 jlink_tap_init();
1329 return ERROR_JTAG_QUEUE_FAILED;
1330 }
1331
1332 if (pending_scan_result->buffer != NULL)
1333 free(pending_scan_result->buffer);
1334 }
1335
1336 jlink_tap_init();
1337 return ERROR_OK;
1338 }
1339
1340 /*****************************************************************************/
1341 /* JLink USB low-level functions */
1342
1343 static struct jlink *jlink_usb_open()
1344 {
1345 struct jtag_libusb_device_handle *devh;
1346 if (jtag_libusb_open(vids, pids, &devh) != ERROR_OK)
1347 return NULL;
1348
1349 /* BE ***VERY CAREFUL*** ABOUT MAKING CHANGES IN THIS
1350 * AREA!!!!!!!!!!! The behavior of libusb is not completely
1351 * consistent across Windows, Linux, and Mac OS X platforms.
1352 * The actions taken in the following compiler conditionals may
1353 * not agree with published documentation for libusb, but were
1354 * found to be necessary through trials and tribulations. Even
1355 * little tweaks can break one or more platforms, so if you do
1356 * make changes test them carefully on all platforms before
1357 * committing them!
1358 */
1359
1360 #if IS_WIN32 == 0
1361
1362 jtag_libusb_reset_device(devh);
1363
1364 #if IS_DARWIN == 0
1365
1366 int timeout = 5;
1367 /* reopen jlink after usb_reset
1368 * on win32 this may take a second or two to re-enumerate */
1369 int retval;
1370 while ((retval = jtag_libusb_open(vids, pids, &devh)) != ERROR_OK) {
1371 usleep(1000);
1372 timeout--;
1373 if (!timeout)
1374 break;
1375 }
1376 if (ERROR_OK != retval)
1377 return NULL;
1378 #endif
1379
1380 #endif
1381
1382 /* usb_set_configuration required under win32 */
1383 struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
1384 jtag_libusb_set_configuration(devh, 0);
1385 jtag_libusb_claim_interface(devh, 0);
1386
1387 #if 0
1388 /*
1389 * This makes problems under Mac OS X. And is not needed
1390 * under Windows. Hopefully this will not break a linux build
1391 */
1392 usb_set_altinterface(result->usb_handle, 0);
1393 #endif
1394
1395 jtag_libusb_get_endpoints(udev, &jlink_read_ep, &jlink_write_ep);
1396
1397 struct jlink *result = malloc(sizeof(struct jlink));
1398 result->usb_handle = devh;
1399 return result;
1400 }
1401
1402 static void jlink_usb_close(struct jlink *jlink)
1403 {
1404 jtag_libusb_close(jlink->usb_handle);
1405 free(jlink);
1406 }
1407
1408 /* Send a message and receive the reply. */
1409 static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length)
1410 {
1411 int result;
1412
1413 result = jlink_usb_write(jlink, out_length);
1414 if (result != out_length) {
1415 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1416 out_length, result);
1417 return ERROR_JTAG_DEVICE_ERROR;
1418 }
1419
1420 result = jlink_usb_read(jlink, in_length);
1421 if ((result != in_length) && (result != (in_length + 1))) {
1422 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1423 in_length, result);
1424 return ERROR_JTAG_DEVICE_ERROR;
1425 }
1426
1427 if (jlink_hw_jtag_version < 3)
1428 return result;
1429
1430 int result2 = ERROR_OK;
1431 if (result == in_length) {
1432 /* Must read the result from the EMU too */
1433 result2 = jlink_usb_read_emu_result(jlink);
1434 if (1 != result2) {
1435 LOG_ERROR("jlink_usb_read_emu_result retried requested = 1, "
1436 "result=%d, in_length=%i", result2, in_length);
1437 /* Try again once, should only happen if (in_length%64 == 0) */
1438 result2 = jlink_usb_read_emu_result(jlink);
1439 if (1 != result2) {
1440 LOG_ERROR("jlink_usb_read_emu_result failed "
1441 "(requested = 1, result=%d)", result2);
1442 return ERROR_JTAG_DEVICE_ERROR;
1443 }
1444 }
1445
1446 /* Check the result itself */
1447 result2 = usb_emu_result_buffer[0];
1448 } else {
1449 /* Save the result, then remove it from return value */
1450 result2 = usb_in_buffer[result--];
1451 }
1452
1453 if (result2) {
1454 LOG_ERROR("jlink_usb_message failed with result=%d)", result2);
1455 return ERROR_JTAG_DEVICE_ERROR;
1456 }
1457
1458 return result;
1459 }
1460
1461 /* calls the given usb_bulk_* function, allowing for the data to
1462 * trickle in with some timeouts */
1463 static int usb_bulk_with_retries(
1464 int (*f)(jtag_libusb_device_handle *, int, char *, int, int),
1465 jtag_libusb_device_handle *dev, int ep,
1466 char *bytes, int size, int timeout)
1467 {
1468 int tries = 3, count = 0;
1469
1470 while (tries && (count < size)) {
1471 int result = f(dev, ep, bytes + count, size - count, timeout);
1472 if (result > 0)
1473 count += result;
1474 else if ((-ETIMEDOUT != result) || !--tries)
1475 return result;
1476 }
1477 return count;
1478 }
1479
1480 static int wrap_usb_bulk_write(jtag_libusb_device_handle *dev, int ep,
1481 char *buff, int size, int timeout)
1482 {
1483 /* usb_bulk_write() takes const char *buff */
1484 return jtag_libusb_bulk_write(dev, ep, buff, size, timeout);
1485 }
1486
1487 static inline int usb_bulk_write_ex(jtag_libusb_device_handle *dev, int ep,
1488 char *bytes, int size, int timeout)
1489 {
1490 return usb_bulk_with_retries(&wrap_usb_bulk_write,
1491 dev, ep, bytes, size, timeout);
1492 }
1493
1494 static inline int usb_bulk_read_ex(jtag_libusb_device_handle *dev, int ep,
1495 char *bytes, int size, int timeout)
1496 {
1497 return usb_bulk_with_retries(&jtag_libusb_bulk_read,
1498 dev, ep, bytes, size, timeout);
1499 }
1500
1501 /* Write data from out_buffer to USB. */
1502 static int jlink_usb_write(struct jlink *jlink, int out_length)
1503 {
1504 int result;
1505
1506 if (out_length > JLINK_OUT_BUFFER_SIZE) {
1507 LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
1508 out_length, JLINK_OUT_BUFFER_SIZE);
1509 return -1;
1510 }
1511
1512 result = usb_bulk_write_ex(jlink->usb_handle, jlink_write_ep,
1513 (char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
1514
1515 DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
1516 out_length, result);
1517
1518 jlink_debug_buffer(usb_out_buffer, out_length);
1519 return result;
1520 }
1521
1522 /* Read data from USB into in_buffer. */
1523 static int jlink_usb_read(struct jlink *jlink, int expected_size)
1524 {
1525 int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1526 (char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
1527
1528 DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
1529
1530 jlink_debug_buffer(usb_in_buffer, result);
1531 return result;
1532 }
1533
1534 /* Read the result from the previous EMU cmd into result_buffer. */
1535 static int jlink_usb_read_emu_result(struct jlink *jlink)
1536 {
1537 int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1538 (char *)usb_emu_result_buffer, 1 /* JLINK_EMU_RESULT_BUFFER_SIZE */,
1539 JLINK_USB_TIMEOUT);
1540
1541 DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result);
1542
1543 jlink_debug_buffer(usb_emu_result_buffer, result);
1544 return result;
1545 }
1546
1547 #ifdef _DEBUG_USB_COMMS_
1548 #define BYTES_PER_LINE 16
1549
1550 static void jlink_debug_buffer(uint8_t *buffer, int length)
1551 {
1552 char line[81];
1553 char s[4];
1554 int i;
1555 int j;
1556
1557 for (i = 0; i < length; i += BYTES_PER_LINE) {
1558 snprintf(line, 5, "%04x", i);
1559 for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
1560 snprintf(s, 4, " %02x", buffer[j]);
1561 strcat(line, s);
1562 }
1563 LOG_DEBUG("%s", line);
1564 }
1565 }
1566 #endif
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