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drivers/jlink: fix SWD speed config, and set it before sending anything
[openocd.git] / src / jtag / drivers / jlink.c
blob9d25eb42bfa387fbb96c10c891573a939114eaf2
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
25 ***************************************************************************/
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <jtag/interface.h>
32 #include <jtag/swd.h>
33 #include <jtag/commands.h>
34 #include "libusb_common.h"
35
36 /* See Segger's public documentation:
37 * Reference manual for J-Link USB Protocol
38 * Document RM08001-R6 Date: June 16, 2009
39 * (Or newer, with some SWD information).
40 * http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
41 */
42
43 /*
44 * The default pid of the segger is 0x0101
45 * But when you change the USB Address it will also
46 *
47 * pid = ( usb_address > 0x4) ? 0x0101 : (0x101 + usb_address)
48 */
49
50 #define JLINK_OB_PID 0x0105
51
52 #define JLINK_WRITE_ENDPOINT 0x02
53 #define JLINK_READ_ENDPOINT 0x81
54
55 #define JLINK_OB_WRITE_ENDPOINT 0x06
56 #define JLINK_OB_READ_ENDPOINT 0x85
57
58 static unsigned int jlink_write_ep = JLINK_WRITE_ENDPOINT;
59 static unsigned int jlink_read_ep = JLINK_READ_ENDPOINT;
60 static unsigned int jlink_hw_jtag_version = 2;
61
62 #define JLINK_USB_TIMEOUT 1000
63
64 /* See Section 3.3.2 of the Segger JLink USB protocol manual */
65 /* 2048 is the max value we can use here */
66 #define JLINK_TAP_BUFFER_SIZE 2048
67 /*#define JLINK_TAP_BUFFER_SIZE 256*/
68 /*#define JLINK_TAP_BUFFER_SIZE 384*/
69
70 #define JLINK_IN_BUFFER_SIZE (2048 + 1)
71 #define JLINK_OUT_BUFFER_SIZE (2*2048 + 4)
72
73 /* Global USB buffers */
74 static uint8_t usb_in_buffer[JLINK_IN_BUFFER_SIZE];
75 static uint8_t usb_out_buffer[JLINK_OUT_BUFFER_SIZE];
76
77 /* Constants for JLink command */
78 #define EMU_CMD_VERSION 0x01
79 #define EMU_CMD_RESET_TRST 0x02
80 #define EMU_CMD_RESET_TARGET 0x03
81 #define EMU_CMD_SET_SPEED 0x05
82 #define EMU_CMD_GET_STATE 0x07
83 #define EMU_CMD_SET_KS_POWER 0x08
84 #define EMU_CMD_GET_SPEEDS 0xc0
85 #define EMU_CMD_GET_HW_INFO 0xc1
86 #define EMU_CMD_GET_COUNTERS 0xc2
87 #define EMU_CMD_SELECT_IF 0xc7
88 #define EMU_CMD_HW_CLOCK 0xc8
89 #define EMU_CMD_HW_TMS0 0xc9
90 #define EMU_CMD_HW_TMS1 0xca
91 #define EMU_CMD_HW_DATA0 0xcb
92 #define EMU_CMD_HW_DATA1 0xcc
93 #define EMU_CMD_HW_JTAG 0xcd
94 #define EMU_CMD_HW_JTAG2 0xce
95 #define EMU_CMD_HW_JTAG3 0xcf
96 #define EMU_CMD_HW_RELEASE_RESET_STOP_EX 0xd0
97 #define EMU_CMD_HW_RELEASE_RESET_STOP_TIMED 0xd1
98 #define EMU_CMD_GET_MAX_MEM_BLOCK 0xd4
99 #define EMU_CMD_HW_JTAG_WRITE 0xd5
100 #define EMU_CMD_HW_JTAG_GET_RESULT 0xd6
101 #define EMU_CMD_HW_RESET0 0xdc
102 #define EMU_CMD_HW_RESET1 0xdd
103 #define EMU_CMD_HW_TRST0 0xde
104 #define EMU_CMD_HW_TRST1 0xdf
105 #define EMU_CMD_GET_CAPS 0xe8
106 #define EMU_CMD_GET_CPU_CAPS 0xe9
107 #define EMU_CMD_EXEC_CPU_CMD 0xea
108 #define EMU_CMD_GET_CAPS_EX 0xed
109 #define EMU_CMD_GET_HW_VERSION 0xf0
110 #define EMU_CMD_WRITE_DCC 0xf1
111 #define EMU_CMD_READ_CONFIG 0xf2
112 #define EMU_CMD_WRITE_CONFIG 0xf3
113 #define EMU_CMD_WRITE_MEM 0xf4
114 #define EMU_CMD_READ_MEM 0xf5
115 #define EMU_CMD_MEASURE_RTCK_REACT 0xf6
116 #define EMU_CMD_WRITE_MEM_ARM79 0xf7
117 #define EMU_CMD_READ_MEM_ARM79 0xf8
118
119 /* bits return from EMU_CMD_GET_CAPS */
120 #define EMU_CAP_RESERVED_1 0
121 #define EMU_CAP_GET_HW_VERSION 1
122 #define EMU_CAP_WRITE_DCC 2
123 #define EMU_CAP_ADAPTIVE_CLOCKING 3
124 #define EMU_CAP_READ_CONFIG 4
125 #define EMU_CAP_WRITE_CONFIG 5
126 #define EMU_CAP_TRACE 6
127 #define EMU_CAP_WRITE_MEM 7
128 #define EMU_CAP_READ_MEM 8
129 #define EMU_CAP_SPEED_INFO 9
130 #define EMU_CAP_EXEC_CODE 10
131 #define EMU_CAP_GET_MAX_BLOCK_SIZE 11
132 #define EMU_CAP_GET_HW_INFO 12
133 #define EMU_CAP_SET_KS_POWER 13
134 #define EMU_CAP_RESET_STOP_TIMED 14
135 #define EMU_CAP_RESERVED_2 15
136 #define EMU_CAP_MEASURE_RTCK_REACT 16
137 #define EMU_CAP_SELECT_IF 17
138 #define EMU_CAP_RW_MEM_ARM79 18
139 #define EMU_CAP_GET_COUNTERS 19
140 #define EMU_CAP_READ_DCC 20
141 #define EMU_CAP_GET_CPU_CAPS 21
142 #define EMU_CAP_EXEC_CPU_CMD 22
143 #define EMU_CAP_SWO 23
144 #define EMU_CAP_WRITE_DCC_EX 24
145 #define EMU_CAP_UPDATE_FIRMWARE_EX 25
146 #define EMU_CAP_FILE_IO 26
147 #define EMU_CAP_REGISTER 27
148 #define EMU_CAP_INDICATORS 28
149 #define EMU_CAP_TEST_NET_SPEED 29
150 #define EMU_CAP_RAWTRACE 30
151 #define EMU_CAP_RESERVED_3 31
152
153 static char *jlink_cap_str[] = {
154 "Always 1.",
155 "Supports command EMU_CMD_GET_HARDWARE_VERSION",
156 "Supports command EMU_CMD_WRITE_DCC",
157 "Supports adaptive clocking",
158 "Supports command EMU_CMD_READ_CONFIG",
159 "Supports command EMU_CMD_WRITE_CONFIG",
160 "Supports trace commands",
161 "Supports command EMU_CMD_WRITE_MEM",
162 "Supports command EMU_CMD_READ_MEM",
163 "Supports command EMU_CMD_GET_SPEED",
164 "Supports command EMU_CMD_CODE_...",
165 "Supports command EMU_CMD_GET_MAX_BLOCK_SIZE",
166 "Supports command EMU_CMD_GET_HW_INFO",
167 "Supports command EMU_CMD_SET_KS_POWER",
168 "Supports command EMU_CMD_HW_RELEASE_RESET_STOP_TIMED",
169 "Reserved",
170 "Supports command EMU_CMD_MEASURE_RTCK_REACT",
171 "Supports command EMU_CMD_HW_SELECT_IF",
172 "Supports command EMU_CMD_READ/WRITE_MEM_ARM79",
173 "Supports command EMU_CMD_GET_COUNTERS",
174 "Supports command EMU_CMD_READ_DCC",
175 "Supports command EMU_CMD_GET_CPU_CAPS",
176 "Supports command EMU_CMD_EXEC_CPU_CMD",
177 "Supports command EMU_CMD_SWO",
178 "Supports command EMU_CMD_WRITE_DCC_EX",
179 "Supports command EMU_CMD_UPDATE_FIRMWARE_EX",
180 "Supports command EMU_CMD_FILE_IO",
181 "Supports command EMU_CMD_REGISTER",
182 "Supports command EMU_CMD_INDICATORS",
183 "Supports command EMU_CMD_TEST_NET_SPEED",
184 "Supports command EMU_CMD_RAWTRACE",
185 "Reserved",
186 };
187
188 /* max speed 12MHz v5.0 jlink */
189 #define JLINK_MAX_SPEED 12000
190
191 /* J-Link hardware versions */
192 #define JLINK_HW_TYPE_JLINK 0
193 #define JLINK_HW_TYPE_JTRACE 1
194 #define JLINK_HW_TYPE_FLASHER 2
195 #define JLINK_HW_TYPE_JLINK_PRO 3
196 #define JLINK_HW_TYPE_MAX 4
197
198 static char *jlink_hw_type_str[] = {
199 "J-Link",
200 "J-Trace",
201 "Flasher",
202 "J-Link Pro",
203 };
204
205 #define JLINK_TIF_JTAG 0
206 #define JLINK_TIF_SWD 1
207 #define JLINK_SWD_DIR_IN 0
208 #define JLINK_SWD_DIR_OUT 1
209
210 /* Queue command functions */
211 static void jlink_end_state(tap_state_t state);
212 static void jlink_state_move(void);
213 static void jlink_path_move(int num_states, tap_state_t *path);
214 static void jlink_runtest(int num_cycles);
215 static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
216 int scan_size, struct scan_command *command);
217 static void jlink_reset(int trst, int srst);
218 static void jlink_simple_command(uint8_t command);
219 static int jlink_get_status(void);
220 static int jlink_swd_run_queue(struct adiv5_dap *dap);
221 static void jlink_swd_queue_cmd(struct adiv5_dap *dap, uint8_t cmd, uint32_t *dst, uint32_t data);
222 static int jlink_swd_switch_seq(struct adiv5_dap *dap, enum swd_special_seq seq);
223
224 /* J-Link tap buffer functions */
225 static void jlink_tap_init(void);
226 static int jlink_tap_execute(void);
227 static void jlink_tap_ensure_space(int scans, int bits);
228 static void jlink_tap_append_step(int tms, int tdi);
229 static void jlink_tap_append_scan(int length, uint8_t *buffer,
230 struct scan_command *command);
231
232 /* Jlink lowlevel functions */
233 struct jlink {
234 struct jtag_libusb_device_handle *usb_handle;
235 };
236
237 static struct jlink *jlink_usb_open(void);
238 static void jlink_usb_close(struct jlink *jlink);
239 static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length);
240 static int jlink_usb_io(struct jlink *jlink, int out_length, int in_length);
241 static int jlink_usb_write(struct jlink *jlink, int out_length);
242 static int jlink_usb_read(struct jlink *jlink, int expected_size);
243
244 /* helper functions */
245 static int jlink_get_version_info(void);
246
247 #ifdef _DEBUG_USB_COMMS_
248 static void jlink_debug_buffer(uint8_t *buffer, int length);
249 #else
250 static inline void jlink_debug_buffer(uint8_t *buffer, int length)
251 {
252 }
253 #endif
254
255 static enum tap_state jlink_last_state = TAP_RESET;
256
257 static struct jlink *jlink_handle;
258
259 /* pid could be specified at runtime */
260 static uint16_t vids[] = { 0x1366, 0x1366, 0x1366, 0x1366, 0x1366, 0 };
261 static uint16_t pids[] = { 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0 };
262
263 static uint32_t jlink_caps;
264 static uint32_t jlink_hw_type;
265
266 static int queued_retval;
267 static bool swd_mode;
268
269 /* 256 byte non-volatile memory */
270 struct jlink_config {
271 uint8_t usb_address;
272 /* 0ffset 0x01 to 0x03 */
273 uint8_t reserved_1[3];
274 uint32_t kickstart_power_on_jtag_pin_19;
275 /* 0ffset 0x08 to 0x1f */
276 uint8_t reserved_2[24];
277 /* IP only for J-Link Pro */
278 uint8_t ip_address[4];
279 uint8_t subnet_mask[4];
280 /* 0ffset 0x28 to 0x2f */
281 uint8_t reserved_3[8];
282 uint8_t mac_address[6];
283 /* 0ffset 0x36 to 0xff */
284 uint8_t reserved_4[202];
285 } __attribute__ ((packed));
286 struct jlink_config jlink_cfg;
287
288 /***************************************************************************/
289 /* External interface implementation */
290
291 static void jlink_execute_runtest(struct jtag_command *cmd)
292 {
293 DEBUG_JTAG_IO("runtest %i cycles, end in %i",
294 cmd->cmd.runtest->num_cycles,
295 cmd->cmd.runtest->end_state);
296
297 jlink_end_state(cmd->cmd.runtest->end_state);
298
299 jlink_runtest(cmd->cmd.runtest->num_cycles);
300 }
301
302 static void jlink_execute_statemove(struct jtag_command *cmd)
303 {
304 DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
305
306 jlink_end_state(cmd->cmd.statemove->end_state);
307 jlink_state_move();
308 }
309
310 static void jlink_execute_pathmove(struct jtag_command *cmd)
311 {
312 DEBUG_JTAG_IO("pathmove: %i states, end in %i",
313 cmd->cmd.pathmove->num_states,
314 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
315
316 jlink_path_move(cmd->cmd.pathmove->num_states,
317 cmd->cmd.pathmove->path);
318 }
319
320 static void jlink_execute_scan(struct jtag_command *cmd)
321 {
322 int scan_size;
323 enum scan_type type;
324 uint8_t *buffer;
325
326 DEBUG_JTAG_IO("scan end in %s", tap_state_name(cmd->cmd.scan->end_state));
327
328 jlink_end_state(cmd->cmd.scan->end_state);
329
330 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
331 DEBUG_JTAG_IO("scan input, length = %d", scan_size);
332
333 jlink_debug_buffer(buffer, (scan_size + 7) / 8);
334 type = jtag_scan_type(cmd->cmd.scan);
335 jlink_scan(cmd->cmd.scan->ir_scan,
336 type, buffer, scan_size, cmd->cmd.scan);
337 }
338
339 static void jlink_execute_reset(struct jtag_command *cmd)
340 {
341 DEBUG_JTAG_IO("reset trst: %i srst %i",
342 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
343
344 jlink_tap_execute();
345 jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
346 jlink_tap_execute();
347 }
348
349 static void jlink_execute_sleep(struct jtag_command *cmd)
350 {
351 DEBUG_JTAG_IO("sleep %" PRIi32 "", cmd->cmd.sleep->us);
352 jlink_tap_execute();
353 jtag_sleep(cmd->cmd.sleep->us);
354 }
355
356 static void jlink_execute_command(struct jtag_command *cmd)
357 {
358 switch (cmd->type) {
359 case JTAG_RUNTEST:
360 jlink_execute_runtest(cmd);
361 break;
362 case JTAG_TLR_RESET:
363 jlink_execute_statemove(cmd);
364 break;
365 case JTAG_PATHMOVE:
366 jlink_execute_pathmove(cmd);
367 break;
368 case JTAG_SCAN:
369 jlink_execute_scan(cmd);
370 break;
371 case JTAG_RESET:
372 jlink_execute_reset(cmd);
373 break;
374 case JTAG_SLEEP:
375 jlink_execute_sleep(cmd);
376 break;
377 default:
378 LOG_ERROR("BUG: unknown JTAG command type encountered");
379 exit(-1);
380 }
381 }
382
383 static int jlink_execute_queue(void)
384 {
385 struct jtag_command *cmd = jtag_command_queue;
386
387 while (cmd != NULL) {
388 jlink_execute_command(cmd);
389 cmd = cmd->next;
390 }
391
392 return jlink_tap_execute();
393 }
394
395 /* Sets speed in kHz. */
396 static int jlink_speed(int speed)
397 {
398 int result;
399
400 if (speed > JLINK_MAX_SPEED) {
401 LOG_INFO("reduce speed request: %dkHz to %dkHz maximum",
402 speed, JLINK_MAX_SPEED);
403 speed = JLINK_MAX_SPEED;
404 }
405
406 /* check for RTCK setting */
407 if (speed == 0)
408 speed = -1;
409
410 usb_out_buffer[0] = EMU_CMD_SET_SPEED;
411 usb_out_buffer[1] = (speed >> 0) & 0xff;
412 usb_out_buffer[2] = (speed >> 8) & 0xff;
413
414 result = jlink_usb_write(jlink_handle, 3);
415 if (result != 3) {
416 LOG_ERROR("J-Link setting speed failed (%d)", result);
417 return ERROR_JTAG_DEVICE_ERROR;
418 }
419
420 return ERROR_OK;
421 }
422
423 static int jlink_speed_div(int speed, int *khz)
424 {
425 *khz = speed;
426
427 return ERROR_OK;
428 }
429
430 static int jlink_khz(int khz, int *jtag_speed)
431 {
432 *jtag_speed = khz;
433
434 return ERROR_OK;
435 }
436
437 /*
438 * select transport interface
439 *
440 * @param iface [0..31] currently: 0=JTAG, 1=SWD
441 * @returns ERROR_OK or ERROR_ code
442 *
443 * @pre jlink_handle must be opened
444 * @pre function may be called only for devices, that have
445 * EMU_CAP_SELECT_IF capability enabled
446 */
447 static int jlink_select_interface(int iface)
448 {
449 /* According to Segger's document RM08001-R7 Date: October 8, 2010,
450 * http://www.segger.com/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
451 * section 5.5.3 EMU_CMD_SELECT_IF
452 * > SubCmd 1..31 to select interface (0..31)
453 *
454 * The table below states:
455 * 0 TIF_JTAG
456 * 1 TIF_SWD
457 *
458 * This obviosly means that to select TIF_JTAG one should write SubCmd = 1.
459 *
460 * In fact, JTAG interface operates when SubCmd=0
461 *
462 * It looks like a typo in documentation, because interfaces 0..31 could not
463 * be selected by 1..31 range command.
464 */
465 assert(iface >= 0 && iface < 32);
466 int result;
467
468 /* get available interfaces */
469 usb_out_buffer[0] = EMU_CMD_SELECT_IF;
470 usb_out_buffer[1] = 0xff;
471
472 result = jlink_usb_io(jlink_handle, 2, 4);
473 if (result != ERROR_OK) {
474 LOG_ERROR("J-Link query interface failed (%d)", result);
475 return ERROR_JTAG_DEVICE_ERROR;
476 }
477
478 uint32_t iface_mask = buf_get_u32(usb_in_buffer, 0, 32);
479
480 if (!(iface_mask & (1<<iface))) {
481 LOG_ERROR("J-Link requesting to select unsupported interface (%" PRIx32 ")", iface_mask);
482 return ERROR_JTAG_DEVICE_ERROR;
483 }
484
485 /* Select interface */
486 usb_out_buffer[0] = EMU_CMD_SELECT_IF;
487 usb_out_buffer[1] = iface;
488
489 result = jlink_usb_io(jlink_handle, 2, 4);
490 if (result != ERROR_OK) {
491 LOG_ERROR("J-Link interface select failed (%d)", result);
492 return ERROR_JTAG_DEVICE_ERROR;
493 }
494
495 return ERROR_OK;
496 }
497
498 static int jlink_init(void)
499 {
500 int i;
501
502 jlink_handle = jlink_usb_open();
503
504 if (jlink_handle == 0) {
505 LOG_ERROR("Cannot find jlink Interface! Please check "
506 "connection and permissions.");
507 return ERROR_JTAG_INIT_FAILED;
508 }
509
510 /*
511 * The next three instructions were added after discovering a problem
512 * while using an oscilloscope.
513 * For the V8 SAM-ICE dongle (and likely other j-link device variants),
514 * the reset line to the target microprocessor was found to cycle only
515 * intermittently during emulator startup (even after encountering the
516 * downstream reset instruction later in the code).
517 * This was found to create two issues:
518 * 1) In general it is a bad practice to not reset a CPU to a known
519 * state when starting an emulator and
520 * 2) something critical happens inside the dongle when it does the
521 * first read following a new USB session.
522 * Keeping the processor in reset during the first read collecting
523 * version information seems to prevent errant
524 * "J-Link command EMU_CMD_VERSION failed" issues.
525 */
526
527 LOG_INFO("J-Link initialization started / target CPU reset initiated");
528 jlink_simple_command(EMU_CMD_HW_TRST0);
529 jlink_simple_command(EMU_CMD_HW_RESET0);
530 usleep(1000);
531
532 jlink_hw_jtag_version = 2;
533
534 if (jlink_get_version_info() == ERROR_OK) {
535 /* attempt to get status */
536 jlink_get_status();
537 }
538
539 /*
540 * Some versions of Segger's software do not select JTAG interface by default.
541 *
542 * Segger recommends to select interface necessarily as a part of init process,
543 * in case any previous session leaves improper interface selected.
544 */
545 int retval;
546 if (jlink_caps & (1<<EMU_CAP_SELECT_IF))
547 retval = jlink_select_interface(swd_mode ? JLINK_TIF_SWD : JLINK_TIF_JTAG);
548 else
549 retval = swd_mode ? ERROR_JTAG_DEVICE_ERROR : ERROR_OK;
550
551 if (retval != ERROR_OK) {
552 LOG_ERROR("Selected transport mode is not supported.");
553 return ERROR_JTAG_INIT_FAILED;
554 }
555
556 LOG_INFO("J-Link JTAG Interface ready");
557
558 jlink_reset(0, 0);
559 jtag_sleep(3000);
560 jlink_tap_init();
561
562 jlink_speed(jtag_get_speed_khz());
563
564 if (!swd_mode) {
565 /* v5/6 jlink seems to have an issue if the first tap move
566 * is not divisible by 8, so we send a TLR on first power up */
567 for (i = 0; i < 8; i++)
568 jlink_tap_append_step(1, 0);
569 jlink_tap_execute();
570 }
571
572 if (swd_mode)
573 jlink_swd_switch_seq(NULL, JTAG_TO_SWD);
574 else
575 jlink_swd_switch_seq(NULL, SWD_TO_JTAG);
576 jlink_swd_run_queue(NULL);
577
578 return ERROR_OK;
579 }
580
581 static int jlink_quit(void)
582 {
583 jlink_usb_close(jlink_handle);
584 return ERROR_OK;
585 }
586
587 /***************************************************************************/
588 /* Queue command implementations */
589
590 static void jlink_end_state(tap_state_t state)
591 {
592 if (tap_is_state_stable(state))
593 tap_set_end_state(state);
594 else {
595 LOG_ERROR("BUG: %i is not a valid end state", state);
596 exit(-1);
597 }
598 }
599
600 /* Goes to the end state. */
601 static void jlink_state_move(void)
602 {
603 int i;
604 int tms = 0;
605 uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
606 uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
607
608 for (i = 0; i < tms_scan_bits; i++) {
609 tms = (tms_scan >> i) & 1;
610 jlink_tap_append_step(tms, 0);
611 }
612
613 tap_set_state(tap_get_end_state());
614 }
615
616 static void jlink_path_move(int num_states, tap_state_t *path)
617 {
618 int i;
619
620 for (i = 0; i < num_states; i++) {
621 if (path[i] == tap_state_transition(tap_get_state(), false))
622 jlink_tap_append_step(0, 0);
623 else if (path[i] == tap_state_transition(tap_get_state(), true))
624 jlink_tap_append_step(1, 0);
625 else {
626 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
627 tap_state_name(tap_get_state()), tap_state_name(path[i]));
628 exit(-1);
629 }
630
631 tap_set_state(path[i]);
632 }
633
634 tap_set_end_state(tap_get_state());
635 }
636
637 static void jlink_runtest(int num_cycles)
638 {
639 int i;
640
641 tap_state_t saved_end_state = tap_get_end_state();
642
643 jlink_tap_ensure_space(1, num_cycles + 16);
644
645 /* only do a state_move when we're not already in IDLE */
646 if (tap_get_state() != TAP_IDLE) {
647 jlink_end_state(TAP_IDLE);
648 jlink_state_move();
649 /* num_cycles--; */
650 }
651
652 /* execute num_cycles */
653 for (i = 0; i < num_cycles; i++)
654 jlink_tap_append_step(0, 0);
655
656 /* finish in end_state */
657 jlink_end_state(saved_end_state);
658 if (tap_get_state() != tap_get_end_state())
659 jlink_state_move();
660 }
661
662 static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
663 int scan_size, struct scan_command *command)
664 {
665 tap_state_t saved_end_state;
666
667 jlink_tap_ensure_space(1, scan_size + 16);
668
669 saved_end_state = tap_get_end_state();
670
671 /* Move to appropriate scan state */
672 jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
673
674 /* Only move if we're not already there */
675 if (tap_get_state() != tap_get_end_state())
676 jlink_state_move();
677
678 jlink_end_state(saved_end_state);
679
680 /* Scan */
681 jlink_tap_append_scan(scan_size, buffer, command);
682
683 /* We are in Exit1, go to Pause */
684 jlink_tap_append_step(0, 0);
685
686 tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
687
688 if (tap_get_state() != tap_get_end_state())
689 jlink_state_move();
690 }
691
692 static void jlink_reset(int trst, int srst)
693 {
694 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
695
696 /* Signals are active low */
697 if (srst == 0)
698 jlink_simple_command(EMU_CMD_HW_RESET1);
699
700 if (srst == 1)
701 jlink_simple_command(EMU_CMD_HW_RESET0);
702
703 if (trst == 1)
704 jlink_simple_command(EMU_CMD_HW_TRST0);
705
706 if (trst == 0)
707 jlink_simple_command(EMU_CMD_HW_TRST1);
708 }
709
710 static void jlink_simple_command(uint8_t command)
711 {
712 int result;
713
714 DEBUG_JTAG_IO("0x%02x", command);
715
716 usb_out_buffer[0] = command;
717 result = jlink_usb_write(jlink_handle, 1);
718
719 if (result != 1)
720 LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
721 }
722
723 static int jlink_get_status(void)
724 {
725 int result;
726
727 jlink_simple_command(EMU_CMD_GET_STATE);
728
729 result = jlink_usb_read(jlink_handle, 8);
730 if (result != 8) {
731 LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result);
732 return ERROR_JTAG_DEVICE_ERROR;
733 }
734
735 int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
736 LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
737 vref / 1000, vref % 1000, \
738 usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
739 usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
740
741 if (vref < 1500)
742 LOG_ERROR("Vref too low. Check Target Power");
743
744 return ERROR_OK;
745 }
746
747 #define jlink_dump_printf(context, expr ...) \
748 do { \
749 if (context) \
750 command_print(context, expr); \
751 else \
752 LOG_INFO(expr); \
753 } while (0);
754
755 static void jlink_caps_dump(struct command_context *ctx)
756 {
757 int i;
758
759 jlink_dump_printf(ctx, "J-Link Capabilities");
760
761 for (i = 1; i < 31; i++)
762 if (jlink_caps & (1 << i))
763 jlink_dump_printf(ctx, "%s", jlink_cap_str[i]);
764 }
765
766 static void jlink_config_usb_address_dump(struct command_context *ctx, struct jlink_config *cfg)
767 {
768 if (!cfg)
769 return;
770
771 jlink_dump_printf(ctx, "USB-Address: 0x%x", cfg->usb_address);
772 }
773
774 static void jlink_config_kickstart_dump(struct command_context *ctx, struct jlink_config *cfg)
775 {
776 if (!cfg)
777 return;
778
779 jlink_dump_printf(ctx, "Kickstart power on JTAG-pin 19: 0x%" PRIx32,
780 cfg->kickstart_power_on_jtag_pin_19);
781 }
782
783 static void jlink_config_mac_address_dump(struct command_context *ctx, struct jlink_config *cfg)
784 {
785 if (!cfg)
786 return;
787
788 jlink_dump_printf(ctx, "MAC Address: %.02x:%.02x:%.02x:%.02x:%.02x:%.02x",
789 cfg->mac_address[5], cfg->mac_address[4],
790 cfg->mac_address[3], cfg->mac_address[2],
791 cfg->mac_address[1], cfg->mac_address[0]);
792 }
793
794 static void jlink_config_ip_dump(struct command_context *ctx, struct jlink_config *cfg)
795 {
796 if (!cfg)
797 return;
798
799 jlink_dump_printf(ctx, "IP Address: %d.%d.%d.%d",
800 cfg->ip_address[3], cfg->ip_address[2],
801 cfg->ip_address[1], cfg->ip_address[0]);
802 jlink_dump_printf(ctx, "Subnet Mask: %d.%d.%d.%d",
803 cfg->subnet_mask[3], cfg->subnet_mask[2],
804 cfg->subnet_mask[1], cfg->subnet_mask[0]);
805 }
806
807 static void jlink_config_dump(struct command_context *ctx, struct jlink_config *cfg)
808 {
809 if (!cfg)
810 return;
811
812 jlink_dump_printf(ctx, "J-Link configuration");
813 jlink_config_usb_address_dump(ctx, cfg);
814 jlink_config_kickstart_dump(ctx, cfg);
815
816 if (jlink_hw_type == JLINK_HW_TYPE_JLINK_PRO) {
817 jlink_config_ip_dump(ctx, cfg);
818 jlink_config_mac_address_dump(ctx, cfg);
819 }
820 }
821
822 static int jlink_get_config(struct jlink_config *cfg)
823 {
824 int result;
825 int size = sizeof(struct jlink_config);
826
827 usb_out_buffer[0] = EMU_CMD_READ_CONFIG;
828 result = jlink_usb_io(jlink_handle, 1, size);
829
830 if (result != ERROR_OK) {
831 LOG_ERROR("jlink_usb_read failed (requested=%d, result=%d)", size, result);
832 return ERROR_FAIL;
833 }
834
835 memcpy(cfg, usb_in_buffer, size);
836 return ERROR_OK;
837 }
838
839 static int jlink_set_config(struct jlink_config *cfg)
840 {
841 int result;
842 int size = sizeof(struct jlink_config);
843
844 jlink_simple_command(EMU_CMD_WRITE_CONFIG);
845
846 memcpy(usb_out_buffer, cfg, size);
847
848 result = jlink_usb_write(jlink_handle, size);
849 if (result != size) {
850 LOG_ERROR("jlink_usb_write failed (requested=%d, result=%d)", 256, result);
851 return ERROR_FAIL;
852 }
853
854 return ERROR_OK;
855 }
856
857 /*
858 * List of unsupported version string markers.
859 *
860 * The firmware versions does not correspond directly with
861 * "Software and documentation pack for Windows", it may be
862 * distinguished by the "compile" date in the information string.
863 *
864 * For example, version string is:
865 * "J-Link ARM V8 compiled May 3 2012 18:36:22"
866 * Marker sould be:
867 * "May 3 2012"
868 *
869 * The list must be terminated by NULL string.
870 */
871 static const char * const unsupported_versions[] = {
872 "Jan 31 2011",
873 "JAN 31 2011",
874 NULL /* End of list */
875 };
876
877 static void jlink_check_supported(const char *str)
878 {
879 const char * const *p = unsupported_versions;
880 while (*p) {
881 if (NULL != strstr(str, *p)) {
882 LOG_WARNING(
883 "Unsupported J-Link firmware version.\n"
884 " Please check http://www.segger.com/j-link-older-versions.html for updates");
885 return;
886 }
887 p++;
888 }
889 }
890
891 static int jlink_get_version_info(void)
892 {
893 int result;
894 int len;
895 uint32_t jlink_max_size;
896
897 /* query hardware version */
898 jlink_simple_command(EMU_CMD_VERSION);
899
900 result = jlink_usb_read(jlink_handle, 2);
901 if (2 != result) {
902 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
903 return ERROR_JTAG_DEVICE_ERROR;
904 }
905
906 len = buf_get_u32(usb_in_buffer, 0, 16);
907 if (len > JLINK_IN_BUFFER_SIZE) {
908 LOG_ERROR("J-Link command EMU_CMD_VERSION impossible return length 0x%0x", len);
909 len = JLINK_IN_BUFFER_SIZE;
910 }
911
912 result = jlink_usb_read(jlink_handle, len);
913 if (result != len) {
914 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
915 return ERROR_JTAG_DEVICE_ERROR;
916 }
917
918 usb_in_buffer[result] = 0;
919 LOG_INFO("%s", (char *)usb_in_buffer);
920 jlink_check_supported((char *)usb_in_buffer);
921
922 /* query hardware capabilities */
923 jlink_simple_command(EMU_CMD_GET_CAPS);
924
925 result = jlink_usb_read(jlink_handle, 4);
926 if (4 != result) {
927 LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result);
928 return ERROR_JTAG_DEVICE_ERROR;
929 }
930
931 jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
932 LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps);
933
934 if (jlink_caps & (1 << EMU_CAP_GET_HW_VERSION)) {
935 /* query hardware version */
936 jlink_simple_command(EMU_CMD_GET_HW_VERSION);
937
938 result = jlink_usb_read(jlink_handle, 4);
939 if (4 != result) {
940 LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result);
941 return ERROR_JTAG_DEVICE_ERROR;
942 }
943
944 uint32_t jlink_hw_version = buf_get_u32(usb_in_buffer, 0, 32);
945 uint32_t major_revision = (jlink_hw_version / 10000) % 100;
946 jlink_hw_type = (jlink_hw_version / 1000000) % 100;
947 if (major_revision >= 5)
948 jlink_hw_jtag_version = 3;
949
950 LOG_INFO("J-Link hw version %i", (int)jlink_hw_version);
951
952 if (jlink_hw_type >= JLINK_HW_TYPE_MAX)
953 LOG_INFO("J-Link hw type uknown 0x%" PRIx32, jlink_hw_type);
954 else
955 LOG_INFO("J-Link hw type %s", jlink_hw_type_str[jlink_hw_type]);
956 }
957
958 if (jlink_caps & (1 << EMU_CAP_GET_MAX_BLOCK_SIZE)) {
959 /* query hardware maximum memory block */
960 jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK);
961
962 result = jlink_usb_read(jlink_handle, 4);
963 if (4 != result) {
964 LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result);
965 return ERROR_JTAG_DEVICE_ERROR;
966 }
967
968 jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
969 LOG_INFO("J-Link max mem block %i", (int)jlink_max_size);
970 }
971
972 if (jlink_caps & (1 << EMU_CAP_READ_CONFIG)) {
973 if (jlink_get_config(&jlink_cfg) != ERROR_OK)
974 return ERROR_JTAG_DEVICE_ERROR;
975
976 jlink_config_dump(NULL, &jlink_cfg);
977 }
978
979 return ERROR_OK;
980 }
981
982 COMMAND_HANDLER(jlink_pid_command)
983 {
984 if (CMD_ARGC != 1) {
985 LOG_ERROR("Need exactly one argument to jlink_pid");
986 return ERROR_FAIL;
987 }
988
989 pids[0] = strtoul(CMD_ARGV[0], NULL, 16);
990 pids[1] = 0;
991 vids[1] = 0;
992
993 return ERROR_OK;
994 }
995
996 COMMAND_HANDLER(jlink_handle_jlink_info_command)
997 {
998 if (jlink_get_version_info() == ERROR_OK) {
999 /* attempt to get status */
1000 jlink_get_status();
1001 }
1002
1003 return ERROR_OK;
1004 }
1005
1006 COMMAND_HANDLER(jlink_handle_jlink_caps_command)
1007 {
1008 jlink_caps_dump(CMD_CTX);
1009
1010 return ERROR_OK;
1011 }
1012
1013 COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command)
1014 {
1015 switch (CMD_ARGC) {
1016 case 0:
1017 command_print(CMD_CTX, "J-Link hw jtag %i", jlink_hw_jtag_version);
1018 break;
1019 case 1: {
1020 int request_version = atoi(CMD_ARGV[0]);
1021 switch (request_version) {
1022 case 2:
1023 case 3:
1024 jlink_hw_jtag_version = request_version;
1025 break;
1026 default:
1027 return ERROR_COMMAND_SYNTAX_ERROR;
1028 }
1029 break;
1030 }
1031 default:
1032 return ERROR_COMMAND_SYNTAX_ERROR;
1033 }
1034
1035 return ERROR_OK;
1036 }
1037
1038 COMMAND_HANDLER(jlink_handle_jlink_kickstart_command)
1039 {
1040 uint32_t kickstart;
1041
1042 if (CMD_ARGC < 1) {
1043 jlink_config_kickstart_dump(CMD_CTX, &jlink_cfg);
1044 return ERROR_OK;
1045 }
1046
1047 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], kickstart);
1048
1049 jlink_cfg.kickstart_power_on_jtag_pin_19 = kickstart;
1050 return ERROR_OK;
1051 }
1052
1053 COMMAND_HANDLER(jlink_handle_jlink_mac_address_command)
1054 {
1055 uint8_t addr[6];
1056 int i;
1057 char *e;
1058 const char *str;
1059
1060 if (CMD_ARGC < 1) {
1061 jlink_config_mac_address_dump(CMD_CTX, &jlink_cfg);
1062 return ERROR_OK;
1063 }
1064
1065 str = CMD_ARGV[0];
1066
1067 if ((strlen(str) != 17) || (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
1068 str[11] != ':' || str[14] != ':')) {
1069 command_print(CMD_CTX, "ethaddr miss format ff:ff:ff:ff:ff:ff");
1070 return ERROR_COMMAND_SYNTAX_ERROR;
1071 }
1072
1073 for (i = 5; i >= 0; i--) {
1074 addr[i] = strtoul(str, &e, 16);
1075 str = e + 1;
1076 }
1077
1078 if (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5])) {
1079 command_print(CMD_CTX, "invalid it's zero mac_address");
1080 return ERROR_COMMAND_SYNTAX_ERROR;
1081 }
1082
1083 if (!(0x01 & addr[0])) {
1084 command_print(CMD_CTX, "invalid it's a multicat mac_address");
1085 return ERROR_COMMAND_SYNTAX_ERROR;
1086 }
1087
1088 memcpy(jlink_cfg.mac_address, addr, sizeof(addr));
1089
1090 return ERROR_OK;
1091 }
1092
1093 static int string_to_ip(const char *s, uint8_t *ip, int *pos)
1094 {
1095 uint8_t lip[4];
1096 char *e;
1097 const char *s_save = s;
1098 int i;
1099
1100 if (!s)
1101 return -EINVAL;
1102
1103 for (i = 0; i < 4; i++) {
1104 lip[i] = strtoul(s, &e, 10);
1105
1106 if (*e != '.' && i != 3)
1107 return -EINVAL;
1108
1109 s = e + 1;
1110 }
1111
1112 *pos = e - s_save;
1113
1114 memcpy(ip, lip, sizeof(lip));
1115 return ERROR_OK;
1116 }
1117
1118 static void cpy_ip(uint8_t *dst, uint8_t *src)
1119 {
1120 int i, j;
1121
1122 for (i = 0, j = 3; i < 4; i++, j--)
1123 dst[i] = src[j];
1124 }
1125
1126 COMMAND_HANDLER(jlink_handle_jlink_ip_command)
1127 {
1128 uint32_t ip_address;
1129 uint32_t subnet_mask = 0;
1130 int i, len;
1131 int ret;
1132 uint8_t subnet_bits = 24;
1133
1134 if (CMD_ARGC < 1) {
1135 jlink_config_ip_dump(CMD_CTX, &jlink_cfg);
1136 return ERROR_OK;
1137 }
1138
1139 ret = string_to_ip(CMD_ARGV[0], (uint8_t *)&ip_address, &i);
1140 if (ret != ERROR_OK)
1141 return ret;
1142
1143 len = strlen(CMD_ARGV[0]);
1144
1145 /* check for this format A.B.C.D/E */
1146
1147 if (i < len) {
1148 if (CMD_ARGV[0][i] != '/')
1149 return ERROR_COMMAND_SYNTAX_ERROR;
1150
1151 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0] + i + 1, subnet_bits);
1152 } else {
1153 if (CMD_ARGC > 1) {
1154 ret = string_to_ip(CMD_ARGV[1], (uint8_t *)&subnet_mask, &i);
1155 if (ret != ERROR_OK)
1156 return ret;
1157 }
1158 }
1159
1160 if (!subnet_mask)
1161 subnet_mask = (uint32_t)(subnet_bits < 32 ?
1162 ((1ULL << subnet_bits) - 1) : 0xffffffff);
1163
1164 cpy_ip(jlink_cfg.ip_address, (uint8_t *)&ip_address);
1165 cpy_ip(jlink_cfg.subnet_mask, (uint8_t *)&subnet_mask);
1166
1167 return ERROR_OK;
1168 }
1169
1170 COMMAND_HANDLER(jlink_handle_jlink_reset_command)
1171 {
1172 memset(&jlink_cfg, 0xff, sizeof(jlink_cfg));
1173 return ERROR_OK;
1174 }
1175
1176 COMMAND_HANDLER(jlink_handle_jlink_save_command)
1177 {
1178 if (!(jlink_caps & (1 << EMU_CAP_WRITE_CONFIG))) {
1179 command_print(CMD_CTX, "J-Link write emulator configuration not supported");
1180 return ERROR_OK;
1181 }
1182
1183 command_print(CMD_CTX, "The J-Link need to be unpluged and repluged ta have the config effective");
1184 return jlink_set_config(&jlink_cfg);
1185 }
1186
1187 COMMAND_HANDLER(jlink_handle_jlink_usb_address_command)
1188 {
1189 uint32_t address;
1190
1191 if (CMD_ARGC < 1) {
1192 jlink_config_usb_address_dump(CMD_CTX, &jlink_cfg);
1193 return ERROR_OK;
1194 }
1195
1196 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
1197
1198 if (address > 0x3 && address != 0xff) {
1199 command_print(CMD_CTX, "USB Address must be between 0x00 and 0x03 or 0xff");
1200 return ERROR_COMMAND_SYNTAX_ERROR;
1201 }
1202
1203 jlink_cfg.usb_address = address;
1204 return ERROR_OK;
1205 }
1206
1207 COMMAND_HANDLER(jlink_handle_jlink_config_command)
1208 {
1209 struct jlink_config cfg;
1210 int ret = ERROR_OK;
1211
1212 if (CMD_ARGC == 0) {
1213 if (!(jlink_caps & (1 << EMU_CAP_READ_CONFIG))) {
1214 command_print(CMD_CTX, "J-Link read emulator configuration not supported");
1215 goto exit;
1216 }
1217
1218 ret = jlink_get_config(&cfg);
1219
1220 if (ret != ERROR_OK)
1221 command_print(CMD_CTX, "J-Link read emulator configuration failled");
1222 else
1223 jlink_config_dump(CMD_CTX, &jlink_cfg);
1224 }
1225
1226 exit:
1227 return ret;
1228 }
1229
1230 static const struct command_registration jlink_config_subcommand_handlers[] = {
1231 {
1232 .name = "kickstart",
1233 .handler = &jlink_handle_jlink_kickstart_command,
1234 .mode = COMMAND_EXEC,
1235 .help = "set Kickstart power on JTAG-pin 19.",
1236 .usage = "[val]",
1237 },
1238 {
1239 .name = "mac_address",
1240 .handler = &jlink_handle_jlink_mac_address_command,
1241 .mode = COMMAND_EXEC,
1242 .help = "set the MAC Address",
1243 .usage = "[ff:ff:ff:ff:ff:ff]",
1244 },
1245 {
1246 .name = "ip",
1247 .handler = &jlink_handle_jlink_ip_command,
1248 .mode = COMMAND_EXEC,
1249 .help = "set the ip address of the J-Link Pro, "
1250 "where A.B.C.D is the ip, "
1251 "E the bit of the subnet mask, "
1252 "F.G.H.I the subnet mask",
1253 .usage = "[A.B.C.D[/E] [F.G.H.I]]",
1254 },
1255 {
1256 .name = "reset",
1257 .handler = &jlink_handle_jlink_reset_command,
1258 .mode = COMMAND_EXEC,
1259 .help = "reset the current config",
1260 },
1261 {
1262 .name = "save",
1263 .handler = &jlink_handle_jlink_save_command,
1264 .mode = COMMAND_EXEC,
1265 .help = "save the current config",
1266 },
1267 {
1268 .name = "usb_address",
1269 .handler = &jlink_handle_jlink_usb_address_command,
1270 .mode = COMMAND_EXEC,
1271 .help = "set the USB-Address, "
1272 "This will change the product id",
1273 .usage = "[0x00 to 0x03 or 0xff]",
1274 },
1275 COMMAND_REGISTRATION_DONE
1276 };
1277
1278 static const struct command_registration jlink_subcommand_handlers[] = {
1279 {
1280 .name = "caps",
1281 .handler = &jlink_handle_jlink_caps_command,
1282 .mode = COMMAND_EXEC,
1283 .help = "show jlink capabilities",
1284 },
1285 {
1286 .name = "info",
1287 .handler = &jlink_handle_jlink_info_command,
1288 .mode = COMMAND_EXEC,
1289 .help = "show jlink info",
1290 },
1291 {
1292 .name = "hw_jtag",
1293 .handler = &jlink_handle_jlink_hw_jtag_command,
1294 .mode = COMMAND_EXEC,
1295 .help = "access J-Link HW JTAG command version",
1296 .usage = "[2|3]",
1297 },
1298 {
1299 .name = "config",
1300 .handler = &jlink_handle_jlink_config_command,
1301 .mode = COMMAND_EXEC,
1302 .help = "access J-Link configuration, "
1303 "if no argument this will dump the config",
1304 .chain = jlink_config_subcommand_handlers,
1305 },
1306 {
1307 .name = "pid",
1308 .handler = &jlink_pid_command,
1309 .mode = COMMAND_CONFIG,
1310 .help = "set the pid of the interface we want to use",
1311 },
1312 COMMAND_REGISTRATION_DONE
1313 };
1314
1315 static const struct command_registration jlink_command_handlers[] = {
1316 {
1317 .name = "jlink",
1318 .mode = COMMAND_ANY,
1319 .help = "perform jlink management",
1320 .chain = jlink_subcommand_handlers,
1321 },
1322 COMMAND_REGISTRATION_DONE
1323 };
1324
1325 static int jlink_swd_init(void)
1326 {
1327 LOG_INFO("JLink SWD mode enabled");
1328 swd_mode = true;
1329
1330 return ERROR_OK;
1331 }
1332
1333 static void jlink_swd_write_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t value)
1334 {
1335 assert(!(cmd & SWD_CMD_RnW));
1336 jlink_swd_queue_cmd(dap, cmd, NULL, value);
1337 }
1338
1339 static void jlink_swd_read_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t *value)
1340 {
1341 assert(cmd & SWD_CMD_RnW);
1342 jlink_swd_queue_cmd(dap, cmd, value, 0);
1343 }
1344
1345 static int_least32_t jlink_swd_frequency(struct adiv5_dap *dap, int_least32_t hz)
1346 {
1347 if (hz > 0)
1348 jlink_speed(hz / 1000);
1349
1350 return hz;
1351 }
1352
1353 static const struct swd_driver jlink_swd = {
1354 .init = jlink_swd_init,
1355 .frequency = jlink_swd_frequency,
1356 .switch_seq = jlink_swd_switch_seq,
1357 .read_reg = jlink_swd_read_reg,
1358 .write_reg = jlink_swd_write_reg,
1359 .run = jlink_swd_run_queue,
1360 };
1361
1362 static const char * const jlink_transports[] = { "jtag", "swd", NULL };
1363
1364 struct jtag_interface jlink_interface = {
1365 .name = "jlink",
1366 .commands = jlink_command_handlers,
1367 .transports = jlink_transports,
1368 .swd = &jlink_swd,
1369
1370 .execute_queue = jlink_execute_queue,
1371 .speed = jlink_speed,
1372 .speed_div = jlink_speed_div,
1373 .khz = jlink_khz,
1374 .init = jlink_init,
1375 .quit = jlink_quit,
1376 };
1377
1378 /***************************************************************************/
1379 /* J-Link tap functions */
1380
1381
1382 static unsigned tap_length;
1383 /* In SWD mode use tms buffer for direction control */
1384 static uint8_t tms_buffer[JLINK_TAP_BUFFER_SIZE];
1385 static uint8_t tdi_buffer[JLINK_TAP_BUFFER_SIZE];
1386 static uint8_t tdo_buffer[JLINK_TAP_BUFFER_SIZE];
1387
1388 struct pending_scan_result {
1389 int first; /* First bit position in tdo_buffer to read */
1390 int length; /* Number of bits to read */
1391 struct scan_command *command; /* Corresponding scan command */
1392 void *buffer;
1393 };
1394
1395 #define MAX_PENDING_SCAN_RESULTS 256
1396
1397 static int pending_scan_results_length;
1398 static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
1399
1400 static void jlink_tap_init(void)
1401 {
1402 tap_length = 0;
1403 pending_scan_results_length = 0;
1404 }
1405
1406 static void jlink_tap_ensure_space(int scans, int bits)
1407 {
1408 int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
1409 int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 32;
1410
1411 if (scans > available_scans || bits > available_bits)
1412 jlink_tap_execute();
1413 }
1414
1415 static void jlink_tap_append_step(int tms, int tdi)
1416 {
1417 int index_var = tap_length / 8;
1418
1419 assert(index_var < JLINK_TAP_BUFFER_SIZE);
1420
1421 int bit_index = tap_length % 8;
1422 uint8_t bit = 1 << bit_index;
1423
1424 /* we do not pad TMS, so be sure to initialize all bits */
1425 if (0 == bit_index)
1426 tms_buffer[index_var] = tdi_buffer[index_var] = 0;
1427
1428 if (tms)
1429 tms_buffer[index_var] |= bit;
1430 else
1431 tms_buffer[index_var] &= ~bit;
1432
1433 if (tdi)
1434 tdi_buffer[index_var] |= bit;
1435 else
1436 tdi_buffer[index_var] &= ~bit;
1437
1438 tap_length++;
1439 }
1440
1441 static void jlink_tap_append_scan(int length, uint8_t *buffer,
1442 struct scan_command *command)
1443 {
1444 struct pending_scan_result *pending_scan_result =
1445 &pending_scan_results_buffer[pending_scan_results_length];
1446 int i;
1447
1448 pending_scan_result->first = tap_length;
1449 pending_scan_result->length = length;
1450 pending_scan_result->command = command;
1451 pending_scan_result->buffer = buffer;
1452
1453 for (i = 0; i < length; i++) {
1454 int tms = (i < (length - 1)) ? 0 : 1;
1455 int tdi = (buffer[i / 8] & (1 << (i % 8))) != 0;
1456 jlink_tap_append_step(tms, tdi);
1457 }
1458 pending_scan_results_length++;
1459 }
1460
1461 /* Pad and send a tap sequence to the device, and receive the answer.
1462 * For the purpose of padding we assume that we are in idle or pause state. */
1463 static int jlink_tap_execute(void)
1464 {
1465 int byte_length;
1466 int i;
1467 int result;
1468
1469 if (!tap_length)
1470 return ERROR_OK;
1471
1472 /* JLink returns an extra NULL in packet when size of incoming
1473 * message is a multiple of 64, creates problems with USB comms.
1474 * WARNING: This will interfere with tap state counting. */
1475 while ((DIV_ROUND_UP(tap_length, 8) % 64) == 0)
1476 jlink_tap_append_step((tap_get_state() == TAP_RESET) ? 1 : 0, 0);
1477
1478 /* number of full bytes (plus one if some would be left over) */
1479 byte_length = DIV_ROUND_UP(tap_length, 8);
1480
1481 bool use_jtag3 = jlink_hw_jtag_version >= 3;
1482 usb_out_buffer[0] = use_jtag3 ? EMU_CMD_HW_JTAG3 : EMU_CMD_HW_JTAG2;
1483 usb_out_buffer[1] = 0;
1484 usb_out_buffer[2] = (tap_length >> 0) & 0xff;
1485 usb_out_buffer[3] = (tap_length >> 8) & 0xff;
1486 memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
1487 memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
1488
1489 jlink_last_state = jtag_debug_state_machine(tms_buffer, tdi_buffer,
1490 tap_length, jlink_last_state);
1491
1492 result = jlink_usb_message(jlink_handle, 4 + 2 * byte_length,
1493 use_jtag3 ? byte_length + 1 : byte_length);
1494 if (result != ERROR_OK) {
1495 LOG_ERROR("jlink_tap_execute failed USB io (%d)", result);
1496 jlink_tap_init();
1497 return ERROR_JTAG_QUEUE_FAILED;
1498 }
1499
1500 result = use_jtag3 ? usb_in_buffer[byte_length] : 0;
1501 if (result != 0) {
1502 LOG_ERROR("jlink_tap_execute failed, result %d (%s)", result,
1503 result == 1 ? "adaptive clocking timeout" : "unknown");
1504 jlink_tap_init();
1505 return ERROR_JTAG_QUEUE_FAILED;
1506 }
1507
1508 memcpy(tdo_buffer, usb_in_buffer, byte_length);
1509
1510 for (i = 0; i < pending_scan_results_length; i++) {
1511 struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i];
1512 uint8_t *buffer = pending_scan_result->buffer;
1513 int length = pending_scan_result->length;
1514 int first = pending_scan_result->first;
1515 struct scan_command *command = pending_scan_result->command;
1516
1517 /* Copy to buffer */
1518 buf_set_buf(tdo_buffer, first, buffer, 0, length);
1519
1520 DEBUG_JTAG_IO("pending scan result, length = %d", length);
1521
1522 jlink_debug_buffer(buffer, DIV_ROUND_UP(length, 8));
1523
1524 if (jtag_read_buffer(buffer, command) != ERROR_OK) {
1525 jlink_tap_init();
1526 return ERROR_JTAG_QUEUE_FAILED;
1527 }
1528
1529 if (pending_scan_result->buffer != NULL)
1530 free(pending_scan_result->buffer);
1531 }
1532
1533 jlink_tap_init();
1534 return ERROR_OK;
1535 }
1536
1537 static void fill_buffer(uint8_t *buf, uint32_t val, uint32_t len)
1538 {
1539 unsigned int tap_pos = tap_length;
1540
1541 while (len > 32) {
1542 buf_set_u32(buf, tap_pos, 32, val);
1543 len -= 32;
1544 tap_pos += 32;
1545 }
1546 if (len)
1547 buf_set_u32(buf, tap_pos, len, val);
1548 }
1549
1550 static void jlink_queue_data_out(const uint8_t *data, uint32_t len)
1551 {
1552 const uint32_t dir_out = 0xffffffff;
1553
1554 if (data)
1555 bit_copy(tdi_buffer, tap_length, data, 0, len);
1556 else
1557 fill_buffer(tdi_buffer, 0, len);
1558 fill_buffer(tms_buffer, dir_out, len);
1559 tap_length += len;
1560 }
1561
1562 static void jlink_queue_data_in(uint32_t len)
1563 {
1564 const uint32_t dir_in = 0;
1565
1566 fill_buffer(tms_buffer, dir_in, len);
1567 tap_length += len;
1568 }
1569
1570 static int jlink_swd_switch_seq(struct adiv5_dap *dap, enum swd_special_seq seq)
1571 {
1572 const uint8_t *s;
1573 unsigned int s_len;
1574
1575 switch (seq) {
1576 case LINE_RESET:
1577 LOG_DEBUG("SWD line reset");
1578 s = swd_seq_line_reset;
1579 s_len = swd_seq_line_reset_len;
1580 break;
1581 case JTAG_TO_SWD:
1582 LOG_DEBUG("JTAG-to-SWD");
1583 s = swd_seq_jtag_to_swd;
1584 s_len = swd_seq_jtag_to_swd_len;
1585 break;
1586 case SWD_TO_JTAG:
1587 LOG_DEBUG("SWD-to-JTAG");
1588 s = swd_seq_swd_to_jtag;
1589 s_len = swd_seq_swd_to_jtag_len;
1590 break;
1591 default:
1592 LOG_ERROR("Sequence %d not supported", seq);
1593 return ERROR_FAIL;
1594 }
1595
1596 jlink_queue_data_out(s, s_len);
1597
1598 return ERROR_OK;
1599 }
1600
1601 static int jlink_swd_run_queue(struct adiv5_dap *dap)
1602 {
1603 LOG_DEBUG("Executing %d queued transactions", pending_scan_results_length);
1604 int retval;
1605
1606 if (queued_retval != ERROR_OK) {
1607 LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
1608 goto skip;
1609 }
1610
1611 /* A transaction must be followed by another transaction or at least 8 idle cycles to
1612 * ensure that data is clocked through the AP. */
1613 jlink_queue_data_out(NULL, 8);
1614
1615 size_t byte_length = DIV_ROUND_UP(tap_length, 8);
1616
1617 /* There's a comment in jlink_tap_execute saying JLink returns
1618 * an extra NULL in packet when size of incoming message is a
1619 * multiple of 64. Someone should verify if that's still the
1620 * case with the current jlink firmware */
1621
1622 usb_out_buffer[0] = EMU_CMD_HW_JTAG3;
1623 usb_out_buffer[1] = 0;
1624 usb_out_buffer[2] = (tap_length >> 0) & 0xff;
1625 usb_out_buffer[3] = (tap_length >> 8) & 0xff;
1626 memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
1627 memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
1628
1629 retval = jlink_usb_message(jlink_handle, 4 + 2 * byte_length,
1630 byte_length + 1);
1631 if (retval != ERROR_OK) {
1632 LOG_ERROR("jlink_swd_run_queue failed USB io (%d)", retval);
1633 goto skip;
1634 }
1635
1636 retval = usb_in_buffer[byte_length];
1637 if (retval) {
1638 LOG_ERROR("jlink_swd_run_queue failed, result %d", retval);
1639 goto skip;
1640 }
1641
1642 for (int i = 0; i < pending_scan_results_length; i++) {
1643 int ack = buf_get_u32(usb_in_buffer, pending_scan_results_buffer[i].first, 3);
1644
1645 if (ack != SWD_ACK_OK) {
1646 LOG_ERROR("SWD ack not OK: %d %s", ack,
1647 ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK");
1648 queued_retval = ack;
1649 goto skip;
1650 } else if (pending_scan_results_buffer[i].length) {
1651 uint32_t data = buf_get_u32(usb_in_buffer, 3 + pending_scan_results_buffer[i].first, 32);
1652 int parity = buf_get_u32(usb_in_buffer, 3 + 32 + pending_scan_results_buffer[i].first, 1);
1653
1654 if (parity != parity_u32(data)) {
1655 LOG_ERROR("SWD Read data parity mismatch");
1656 queued_retval = ERROR_FAIL;
1657 goto skip;
1658 }
1659
1660 if (pending_scan_results_buffer[i].buffer)
1661 *(uint32_t *)pending_scan_results_buffer[i].buffer = data;
1662 }
1663 }
1664
1665 skip:
1666 jlink_tap_init();
1667 retval = queued_retval;
1668 queued_retval = ERROR_OK;
1669
1670 return retval;
1671 }
1672
1673 static void jlink_swd_queue_cmd(struct adiv5_dap *dap, uint8_t cmd, uint32_t *dst, uint32_t data)
1674 {
1675 uint8_t data_parity_trn[DIV_ROUND_UP(32 + 1, 8)];
1676 if (tap_length + 46 + 8 + dap->memaccess_tck >= sizeof(tdi_buffer) * 8 ||
1677 pending_scan_results_length == MAX_PENDING_SCAN_RESULTS) {
1678 /* Not enough room in the queue. Run the queue. */
1679 queued_retval = jlink_swd_run_queue(dap);
1680 }
1681
1682 if (queued_retval != ERROR_OK)
1683 return;
1684
1685 cmd |= SWD_CMD_START | SWD_CMD_PARK;
1686
1687 jlink_queue_data_out(&cmd, 8);
1688
1689 pending_scan_results_buffer[pending_scan_results_length].first = tap_length;
1690
1691 if (cmd & SWD_CMD_RnW) {
1692 /* Queue a read transaction */
1693 pending_scan_results_buffer[pending_scan_results_length].length = 32;
1694 pending_scan_results_buffer[pending_scan_results_length].buffer = dst;
1695
1696 jlink_queue_data_in(1 + 3 + 32 + 1 + 1);
1697 } else {
1698 /* Queue a write transaction */
1699 pending_scan_results_buffer[pending_scan_results_length].length = 0;
1700 jlink_queue_data_in(1 + 3 + 1);
1701
1702 buf_set_u32(data_parity_trn, 0, 32, data);
1703 buf_set_u32(data_parity_trn, 32, 1, parity_u32(data));
1704
1705 jlink_queue_data_out(data_parity_trn, 32 + 1);
1706 }
1707
1708 pending_scan_results_length++;
1709
1710 /* Insert idle cycles after AP accesses to avoid WAIT */
1711 if (cmd & SWD_CMD_APnDP)
1712 jlink_queue_data_out(NULL, dap->memaccess_tck);
1713 }
1714
1715 /*****************************************************************************/
1716 /* JLink USB low-level functions */
1717
1718 static struct jlink *jlink_usb_open()
1719 {
1720 struct jtag_libusb_device_handle *devh;
1721 if (jtag_libusb_open(vids, pids, &devh) != ERROR_OK)
1722 return NULL;
1723
1724 /* BE ***VERY CAREFUL*** ABOUT MAKING CHANGES IN THIS
1725 * AREA!!!!!!!!!!! The behavior of libusb is not completely
1726 * consistent across Windows, Linux, and Mac OS X platforms.
1727 * The actions taken in the following compiler conditionals may
1728 * not agree with published documentation for libusb, but were
1729 * found to be necessary through trials and tribulations. Even
1730 * little tweaks can break one or more platforms, so if you do
1731 * make changes test them carefully on all platforms before
1732 * committing them!
1733 */
1734
1735 #if IS_WIN32 == 0
1736
1737 jtag_libusb_reset_device(devh);
1738
1739 #if IS_DARWIN == 0
1740
1741 int timeout = 5;
1742 /* reopen jlink after usb_reset
1743 * on win32 this may take a second or two to re-enumerate */
1744 int retval;
1745 while ((retval = jtag_libusb_open(vids, pids, &devh)) != ERROR_OK) {
1746 usleep(1000);
1747 timeout--;
1748 if (!timeout)
1749 break;
1750 }
1751 if (ERROR_OK != retval)
1752 return NULL;
1753 #endif
1754
1755 #endif
1756
1757 /* usb_set_configuration required under win32 */
1758 struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
1759 jtag_libusb_set_configuration(devh, 0);
1760 jtag_libusb_claim_interface(devh, 0);
1761
1762 #if 0
1763 /*
1764 * This makes problems under Mac OS X. And is not needed
1765 * under Windows. Hopefully this will not break a linux build
1766 */
1767 usb_set_altinterface(result->usb_handle, 0);
1768 #endif
1769
1770 /* Use the OB endpoints if the JLink we matched is a Jlink-OB adapter */
1771 uint16_t matched_pid;
1772 if (jtag_libusb_get_pid(udev, &matched_pid) == ERROR_OK) {
1773 if (matched_pid == JLINK_OB_PID) {
1774 jlink_read_ep = JLINK_OB_WRITE_ENDPOINT;
1775 jlink_write_ep = JLINK_OB_READ_ENDPOINT;
1776 }
1777 }
1778
1779 jtag_libusb_get_endpoints(udev, &jlink_read_ep, &jlink_write_ep);
1780
1781 struct jlink *result = malloc(sizeof(struct jlink));
1782 result->usb_handle = devh;
1783 return result;
1784 }
1785
1786 static void jlink_usb_close(struct jlink *jlink)
1787 {
1788 jtag_libusb_close(jlink->usb_handle);
1789 free(jlink);
1790 }
1791
1792 /* Send a message and receive the reply. */
1793 static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length)
1794 {
1795 int result;
1796
1797 result = jlink_usb_write(jlink, out_length);
1798 if (result != out_length) {
1799 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1800 out_length, result);
1801 return ERROR_JTAG_DEVICE_ERROR;
1802 }
1803
1804 result = jlink_usb_read(jlink, in_length);
1805 if (result != in_length) {
1806 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1807 in_length, result);
1808 return ERROR_JTAG_DEVICE_ERROR;
1809 }
1810 return ERROR_OK;
1811 }
1812
1813 /* calls the given usb_bulk_* function, allowing for the data to
1814 * trickle in with some timeouts */
1815 static int usb_bulk_with_retries(
1816 int (*f)(jtag_libusb_device_handle *, int, char *, int, int),
1817 jtag_libusb_device_handle *dev, int ep,
1818 char *bytes, int size, int timeout)
1819 {
1820 int tries = 3, count = 0;
1821
1822 while (tries && (count < size)) {
1823 int result = f(dev, ep, bytes + count, size - count, timeout);
1824 if (result > 0)
1825 count += result;
1826 else if ((-ETIMEDOUT != result) || !--tries)
1827 return result;
1828 }
1829 return count;
1830 }
1831
1832 static int wrap_usb_bulk_write(jtag_libusb_device_handle *dev, int ep,
1833 char *buff, int size, int timeout)
1834 {
1835 /* usb_bulk_write() takes const char *buff */
1836 return jtag_libusb_bulk_write(dev, ep, buff, size, timeout);
1837 }
1838
1839 static inline int usb_bulk_write_ex(jtag_libusb_device_handle *dev, int ep,
1840 char *bytes, int size, int timeout)
1841 {
1842 return usb_bulk_with_retries(&wrap_usb_bulk_write,
1843 dev, ep, bytes, size, timeout);
1844 }
1845
1846 static inline int usb_bulk_read_ex(jtag_libusb_device_handle *dev, int ep,
1847 char *bytes, int size, int timeout)
1848 {
1849 return usb_bulk_with_retries(&jtag_libusb_bulk_read,
1850 dev, ep, bytes, size, timeout);
1851 }
1852
1853 /* Write data from out_buffer to USB. */
1854 static int jlink_usb_write(struct jlink *jlink, int out_length)
1855 {
1856 int result;
1857
1858 if (out_length > JLINK_OUT_BUFFER_SIZE) {
1859 LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
1860 out_length, JLINK_OUT_BUFFER_SIZE);
1861 return -1;
1862 }
1863
1864 result = usb_bulk_write_ex(jlink->usb_handle, jlink_write_ep,
1865 (char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
1866
1867 DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
1868 out_length, result);
1869
1870 jlink_debug_buffer(usb_out_buffer, out_length);
1871 return result;
1872 }
1873
1874 /* Read data from USB into in_buffer. */
1875 static int jlink_usb_read(struct jlink *jlink, int expected_size)
1876 {
1877 int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1878 (char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
1879
1880 DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
1881
1882 jlink_debug_buffer(usb_in_buffer, result);
1883 return result;
1884 }
1885
1886 /*
1887 * Send a message and receive the reply - simple messages.
1888 *
1889 * @param jlink pointer to driver data
1890 * @param out_length data length in @c usb_out_buffer
1891 * @param in_length data length to be read to @c usb_in_buffer
1892 */
1893 static int jlink_usb_io(struct jlink *jlink, int out_length, int in_length)
1894 {
1895 int result;
1896
1897 result = jlink_usb_write(jlink, out_length);
1898 if (result != out_length) {
1899 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1900 out_length, result);
1901 return ERROR_JTAG_DEVICE_ERROR;
1902 }
1903
1904 result = jlink_usb_read(jlink, in_length);
1905 if (result != in_length) {
1906 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1907 in_length, result);
1908 return ERROR_JTAG_DEVICE_ERROR;
1909 }
1910
1911 /*
1912 * Section 4.2.4 IN-transaction:
1913 * read dummy 0-byte packet if transaction size is
1914 * multiple of 64 bytes but not max. size of 0x8000
1915 */
1916 if ((in_length % 64) == 0 && in_length != 0x8000) {
1917 char dummy_buffer;
1918 result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1919 &dummy_buffer, 1, JLINK_USB_TIMEOUT);
1920 if (result != 0) {
1921 LOG_ERROR("dummy byte read failed");
1922 return ERROR_JTAG_DEVICE_ERROR;
1923 }
1924 }
1925 return ERROR_OK;
1926 }
1927
1928 #ifdef _DEBUG_USB_COMMS_
1929 #define BYTES_PER_LINE 16
1930
1931 static void jlink_debug_buffer(uint8_t *buffer, int length)
1932 {
1933 char line[81];
1934 char s[4];
1935 int i;
1936 int j;
1937
1938 for (i = 0; i < length; i += BYTES_PER_LINE) {
1939 snprintf(line, 5, "%04x", i);
1940 for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
1941 snprintf(s, 4, " %02x", buffer[j]);
1942 strcat(line, s);
1943 }
1944 LOG_DEBUG("%s", line);
1945 }
1946 }
1947 #endif
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