drivers/jtag/jlink: support SWD mode
[openocd.git] / src / jtag / drivers / jlink.c
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 if (!swd_mode) {
563 /* v5/6 jlink seems to have an issue if the first tap move
564 * is not divisible by 8, so we send a TLR on first power up */
565 for (i = 0; i < 8; i++)
566 jlink_tap_append_step(1, 0);
567 jlink_tap_execute();
568 }
569
570 if (swd_mode)
571 jlink_swd_switch_seq(NULL, JTAG_TO_SWD);
572 else
573 jlink_swd_switch_seq(NULL, SWD_TO_JTAG);
574 jlink_swd_run_queue(NULL);
575
576 return ERROR_OK;
577 }
578
579 static int jlink_quit(void)
580 {
581 jlink_usb_close(jlink_handle);
582 return ERROR_OK;
583 }
584
585 /***************************************************************************/
586 /* Queue command implementations */
587
588 static void jlink_end_state(tap_state_t state)
589 {
590 if (tap_is_state_stable(state))
591 tap_set_end_state(state);
592 else {
593 LOG_ERROR("BUG: %i is not a valid end state", state);
594 exit(-1);
595 }
596 }
597
598 /* Goes to the end state. */
599 static void jlink_state_move(void)
600 {
601 int i;
602 int tms = 0;
603 uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
604 uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
605
606 for (i = 0; i < tms_scan_bits; i++) {
607 tms = (tms_scan >> i) & 1;
608 jlink_tap_append_step(tms, 0);
609 }
610
611 tap_set_state(tap_get_end_state());
612 }
613
614 static void jlink_path_move(int num_states, tap_state_t *path)
615 {
616 int i;
617
618 for (i = 0; i < num_states; i++) {
619 if (path[i] == tap_state_transition(tap_get_state(), false))
620 jlink_tap_append_step(0, 0);
621 else if (path[i] == tap_state_transition(tap_get_state(), true))
622 jlink_tap_append_step(1, 0);
623 else {
624 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
625 tap_state_name(tap_get_state()), tap_state_name(path[i]));
626 exit(-1);
627 }
628
629 tap_set_state(path[i]);
630 }
631
632 tap_set_end_state(tap_get_state());
633 }
634
635 static void jlink_runtest(int num_cycles)
636 {
637 int i;
638
639 tap_state_t saved_end_state = tap_get_end_state();
640
641 jlink_tap_ensure_space(1, num_cycles + 16);
642
643 /* only do a state_move when we're not already in IDLE */
644 if (tap_get_state() != TAP_IDLE) {
645 jlink_end_state(TAP_IDLE);
646 jlink_state_move();
647 /* num_cycles--; */
648 }
649
650 /* execute num_cycles */
651 for (i = 0; i < num_cycles; i++)
652 jlink_tap_append_step(0, 0);
653
654 /* finish in end_state */
655 jlink_end_state(saved_end_state);
656 if (tap_get_state() != tap_get_end_state())
657 jlink_state_move();
658 }
659
660 static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
661 int scan_size, struct scan_command *command)
662 {
663 tap_state_t saved_end_state;
664
665 jlink_tap_ensure_space(1, scan_size + 16);
666
667 saved_end_state = tap_get_end_state();
668
669 /* Move to appropriate scan state */
670 jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
671
672 /* Only move if we're not already there */
673 if (tap_get_state() != tap_get_end_state())
674 jlink_state_move();
675
676 jlink_end_state(saved_end_state);
677
678 /* Scan */
679 jlink_tap_append_scan(scan_size, buffer, command);
680
681 /* We are in Exit1, go to Pause */
682 jlink_tap_append_step(0, 0);
683
684 tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
685
686 if (tap_get_state() != tap_get_end_state())
687 jlink_state_move();
688 }
689
690 static void jlink_reset(int trst, int srst)
691 {
692 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
693
694 /* Signals are active low */
695 if (srst == 0)
696 jlink_simple_command(EMU_CMD_HW_RESET1);
697
698 if (srst == 1)
699 jlink_simple_command(EMU_CMD_HW_RESET0);
700
701 if (trst == 1)
702 jlink_simple_command(EMU_CMD_HW_TRST0);
703
704 if (trst == 0)
705 jlink_simple_command(EMU_CMD_HW_TRST1);
706 }
707
708 static void jlink_simple_command(uint8_t command)
709 {
710 int result;
711
712 DEBUG_JTAG_IO("0x%02x", command);
713
714 usb_out_buffer[0] = command;
715 result = jlink_usb_write(jlink_handle, 1);
716
717 if (result != 1)
718 LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
719 }
720
721 static int jlink_get_status(void)
722 {
723 int result;
724
725 jlink_simple_command(EMU_CMD_GET_STATE);
726
727 result = jlink_usb_read(jlink_handle, 8);
728 if (result != 8) {
729 LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result);
730 return ERROR_JTAG_DEVICE_ERROR;
731 }
732
733 int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
734 LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
735 vref / 1000, vref % 1000, \
736 usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
737 usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
738
739 if (vref < 1500)
740 LOG_ERROR("Vref too low. Check Target Power");
741
742 return ERROR_OK;
743 }
744
745 #define jlink_dump_printf(context, expr ...) \
746 do { \
747 if (context) \
748 command_print(context, expr); \
749 else \
750 LOG_INFO(expr); \
751 } while (0);
752
753 static void jlink_caps_dump(struct command_context *ctx)
754 {
755 int i;
756
757 jlink_dump_printf(ctx, "J-Link Capabilities");
758
759 for (i = 1; i < 31; i++)
760 if (jlink_caps & (1 << i))
761 jlink_dump_printf(ctx, "%s", jlink_cap_str[i]);
762 }
763
764 static void jlink_config_usb_address_dump(struct command_context *ctx, struct jlink_config *cfg)
765 {
766 if (!cfg)
767 return;
768
769 jlink_dump_printf(ctx, "USB-Address: 0x%x", cfg->usb_address);
770 }
771
772 static void jlink_config_kickstart_dump(struct command_context *ctx, struct jlink_config *cfg)
773 {
774 if (!cfg)
775 return;
776
777 jlink_dump_printf(ctx, "Kickstart power on JTAG-pin 19: 0x%" PRIx32,
778 cfg->kickstart_power_on_jtag_pin_19);
779 }
780
781 static void jlink_config_mac_address_dump(struct command_context *ctx, struct jlink_config *cfg)
782 {
783 if (!cfg)
784 return;
785
786 jlink_dump_printf(ctx, "MAC Address: %.02x:%.02x:%.02x:%.02x:%.02x:%.02x",
787 cfg->mac_address[5], cfg->mac_address[4],
788 cfg->mac_address[3], cfg->mac_address[2],
789 cfg->mac_address[1], cfg->mac_address[0]);
790 }
791
792 static void jlink_config_ip_dump(struct command_context *ctx, struct jlink_config *cfg)
793 {
794 if (!cfg)
795 return;
796
797 jlink_dump_printf(ctx, "IP Address: %d.%d.%d.%d",
798 cfg->ip_address[3], cfg->ip_address[2],
799 cfg->ip_address[1], cfg->ip_address[0]);
800 jlink_dump_printf(ctx, "Subnet Mask: %d.%d.%d.%d",
801 cfg->subnet_mask[3], cfg->subnet_mask[2],
802 cfg->subnet_mask[1], cfg->subnet_mask[0]);
803 }
804
805 static void jlink_config_dump(struct command_context *ctx, struct jlink_config *cfg)
806 {
807 if (!cfg)
808 return;
809
810 jlink_dump_printf(ctx, "J-Link configuration");
811 jlink_config_usb_address_dump(ctx, cfg);
812 jlink_config_kickstart_dump(ctx, cfg);
813
814 if (jlink_hw_type == JLINK_HW_TYPE_JLINK_PRO) {
815 jlink_config_ip_dump(ctx, cfg);
816 jlink_config_mac_address_dump(ctx, cfg);
817 }
818 }
819
820 static int jlink_get_config(struct jlink_config *cfg)
821 {
822 int result;
823 int size = sizeof(struct jlink_config);
824
825 usb_out_buffer[0] = EMU_CMD_READ_CONFIG;
826 result = jlink_usb_io(jlink_handle, 1, size);
827
828 if (result != ERROR_OK) {
829 LOG_ERROR("jlink_usb_read failed (requested=%d, result=%d)", size, result);
830 return ERROR_FAIL;
831 }
832
833 memcpy(cfg, usb_in_buffer, size);
834 return ERROR_OK;
835 }
836
837 static int jlink_set_config(struct jlink_config *cfg)
838 {
839 int result;
840 int size = sizeof(struct jlink_config);
841
842 jlink_simple_command(EMU_CMD_WRITE_CONFIG);
843
844 memcpy(usb_out_buffer, cfg, size);
845
846 result = jlink_usb_write(jlink_handle, size);
847 if (result != size) {
848 LOG_ERROR("jlink_usb_write failed (requested=%d, result=%d)", 256, result);
849 return ERROR_FAIL;
850 }
851
852 return ERROR_OK;
853 }
854
855 /*
856 * List of unsupported version string markers.
857 *
858 * The firmware versions does not correspond directly with
859 * "Software and documentation pack for Windows", it may be
860 * distinguished by the "compile" date in the information string.
861 *
862 * For example, version string is:
863 * "J-Link ARM V8 compiled May 3 2012 18:36:22"
864 * Marker sould be:
865 * "May 3 2012"
866 *
867 * The list must be terminated by NULL string.
868 */
869 static const char * const unsupported_versions[] = {
870 "Jan 31 2011",
871 "JAN 31 2011",
872 NULL /* End of list */
873 };
874
875 static void jlink_check_supported(const char *str)
876 {
877 const char * const *p = unsupported_versions;
878 while (*p) {
879 if (NULL != strstr(str, *p)) {
880 LOG_WARNING(
881 "Unsupported J-Link firmware version.\n"
882 " Please check http://www.segger.com/j-link-older-versions.html for updates");
883 return;
884 }
885 p++;
886 }
887 }
888
889 static int jlink_get_version_info(void)
890 {
891 int result;
892 int len;
893 uint32_t jlink_max_size;
894
895 /* query hardware version */
896 jlink_simple_command(EMU_CMD_VERSION);
897
898 result = jlink_usb_read(jlink_handle, 2);
899 if (2 != result) {
900 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
901 return ERROR_JTAG_DEVICE_ERROR;
902 }
903
904 len = buf_get_u32(usb_in_buffer, 0, 16);
905 if (len > JLINK_IN_BUFFER_SIZE) {
906 LOG_ERROR("J-Link command EMU_CMD_VERSION impossible return length 0x%0x", len);
907 len = JLINK_IN_BUFFER_SIZE;
908 }
909
910 result = jlink_usb_read(jlink_handle, len);
911 if (result != len) {
912 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
913 return ERROR_JTAG_DEVICE_ERROR;
914 }
915
916 usb_in_buffer[result] = 0;
917 LOG_INFO("%s", (char *)usb_in_buffer);
918 jlink_check_supported((char *)usb_in_buffer);
919
920 /* query hardware capabilities */
921 jlink_simple_command(EMU_CMD_GET_CAPS);
922
923 result = jlink_usb_read(jlink_handle, 4);
924 if (4 != result) {
925 LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result);
926 return ERROR_JTAG_DEVICE_ERROR;
927 }
928
929 jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
930 LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps);
931
932 if (jlink_caps & (1 << EMU_CAP_GET_HW_VERSION)) {
933 /* query hardware version */
934 jlink_simple_command(EMU_CMD_GET_HW_VERSION);
935
936 result = jlink_usb_read(jlink_handle, 4);
937 if (4 != result) {
938 LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result);
939 return ERROR_JTAG_DEVICE_ERROR;
940 }
941
942 uint32_t jlink_hw_version = buf_get_u32(usb_in_buffer, 0, 32);
943 uint32_t major_revision = (jlink_hw_version / 10000) % 100;
944 jlink_hw_type = (jlink_hw_version / 1000000) % 100;
945 if (major_revision >= 5)
946 jlink_hw_jtag_version = 3;
947
948 LOG_INFO("J-Link hw version %i", (int)jlink_hw_version);
949
950 if (jlink_hw_type >= JLINK_HW_TYPE_MAX)
951 LOG_INFO("J-Link hw type uknown 0x%" PRIx32, jlink_hw_type);
952 else
953 LOG_INFO("J-Link hw type %s", jlink_hw_type_str[jlink_hw_type]);
954 }
955
956 if (jlink_caps & (1 << EMU_CAP_GET_MAX_BLOCK_SIZE)) {
957 /* query hardware maximum memory block */
958 jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK);
959
960 result = jlink_usb_read(jlink_handle, 4);
961 if (4 != result) {
962 LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result);
963 return ERROR_JTAG_DEVICE_ERROR;
964 }
965
966 jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
967 LOG_INFO("J-Link max mem block %i", (int)jlink_max_size);
968 }
969
970 if (jlink_caps & (1 << EMU_CAP_READ_CONFIG)) {
971 if (jlink_get_config(&jlink_cfg) != ERROR_OK)
972 return ERROR_JTAG_DEVICE_ERROR;
973
974 jlink_config_dump(NULL, &jlink_cfg);
975 }
976
977 return ERROR_OK;
978 }
979
980 COMMAND_HANDLER(jlink_pid_command)
981 {
982 if (CMD_ARGC != 1) {
983 LOG_ERROR("Need exactly one argument to jlink_pid");
984 return ERROR_FAIL;
985 }
986
987 pids[0] = strtoul(CMD_ARGV[0], NULL, 16);
988 pids[1] = 0;
989 vids[1] = 0;
990
991 return ERROR_OK;
992 }
993
994 COMMAND_HANDLER(jlink_handle_jlink_info_command)
995 {
996 if (jlink_get_version_info() == ERROR_OK) {
997 /* attempt to get status */
998 jlink_get_status();
999 }
1000
1001 return ERROR_OK;
1002 }
1003
1004 COMMAND_HANDLER(jlink_handle_jlink_caps_command)
1005 {
1006 jlink_caps_dump(CMD_CTX);
1007
1008 return ERROR_OK;
1009 }
1010
1011 COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command)
1012 {
1013 switch (CMD_ARGC) {
1014 case 0:
1015 command_print(CMD_CTX, "J-Link hw jtag %i", jlink_hw_jtag_version);
1016 break;
1017 case 1: {
1018 int request_version = atoi(CMD_ARGV[0]);
1019 switch (request_version) {
1020 case 2:
1021 case 3:
1022 jlink_hw_jtag_version = request_version;
1023 break;
1024 default:
1025 return ERROR_COMMAND_SYNTAX_ERROR;
1026 }
1027 break;
1028 }
1029 default:
1030 return ERROR_COMMAND_SYNTAX_ERROR;
1031 }
1032
1033 return ERROR_OK;
1034 }
1035
1036 COMMAND_HANDLER(jlink_handle_jlink_kickstart_command)
1037 {
1038 uint32_t kickstart;
1039
1040 if (CMD_ARGC < 1) {
1041 jlink_config_kickstart_dump(CMD_CTX, &jlink_cfg);
1042 return ERROR_OK;
1043 }
1044
1045 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], kickstart);
1046
1047 jlink_cfg.kickstart_power_on_jtag_pin_19 = kickstart;
1048 return ERROR_OK;
1049 }
1050
1051 COMMAND_HANDLER(jlink_handle_jlink_mac_address_command)
1052 {
1053 uint8_t addr[6];
1054 int i;
1055 char *e;
1056 const char *str;
1057
1058 if (CMD_ARGC < 1) {
1059 jlink_config_mac_address_dump(CMD_CTX, &jlink_cfg);
1060 return ERROR_OK;
1061 }
1062
1063 str = CMD_ARGV[0];
1064
1065 if ((strlen(str) != 17) || (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
1066 str[11] != ':' || str[14] != ':')) {
1067 command_print(CMD_CTX, "ethaddr miss format ff:ff:ff:ff:ff:ff");
1068 return ERROR_COMMAND_SYNTAX_ERROR;
1069 }
1070
1071 for (i = 5; i >= 0; i--) {
1072 addr[i] = strtoul(str, &e, 16);
1073 str = e + 1;
1074 }
1075
1076 if (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5])) {
1077 command_print(CMD_CTX, "invalid it's zero mac_address");
1078 return ERROR_COMMAND_SYNTAX_ERROR;
1079 }
1080
1081 if (!(0x01 & addr[0])) {
1082 command_print(CMD_CTX, "invalid it's a multicat mac_address");
1083 return ERROR_COMMAND_SYNTAX_ERROR;
1084 }
1085
1086 memcpy(jlink_cfg.mac_address, addr, sizeof(addr));
1087
1088 return ERROR_OK;
1089 }
1090
1091 static int string_to_ip(const char *s, uint8_t *ip, int *pos)
1092 {
1093 uint8_t lip[4];
1094 char *e;
1095 const char *s_save = s;
1096 int i;
1097
1098 if (!s)
1099 return -EINVAL;
1100
1101 for (i = 0; i < 4; i++) {
1102 lip[i] = strtoul(s, &e, 10);
1103
1104 if (*e != '.' && i != 3)
1105 return -EINVAL;
1106
1107 s = e + 1;
1108 }
1109
1110 *pos = e - s_save;
1111
1112 memcpy(ip, lip, sizeof(lip));
1113 return ERROR_OK;
1114 }
1115
1116 static void cpy_ip(uint8_t *dst, uint8_t *src)
1117 {
1118 int i, j;
1119
1120 for (i = 0, j = 3; i < 4; i++, j--)
1121 dst[i] = src[j];
1122 }
1123
1124 COMMAND_HANDLER(jlink_handle_jlink_ip_command)
1125 {
1126 uint32_t ip_address;
1127 uint32_t subnet_mask = 0;
1128 int i, len;
1129 int ret;
1130 uint8_t subnet_bits = 24;
1131
1132 if (CMD_ARGC < 1) {
1133 jlink_config_ip_dump(CMD_CTX, &jlink_cfg);
1134 return ERROR_OK;
1135 }
1136
1137 ret = string_to_ip(CMD_ARGV[0], (uint8_t *)&ip_address, &i);
1138 if (ret != ERROR_OK)
1139 return ret;
1140
1141 len = strlen(CMD_ARGV[0]);
1142
1143 /* check for this format A.B.C.D/E */
1144
1145 if (i < len) {
1146 if (CMD_ARGV[0][i] != '/')
1147 return ERROR_COMMAND_SYNTAX_ERROR;
1148
1149 COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0] + i + 1, subnet_bits);
1150 } else {
1151 if (CMD_ARGC > 1) {
1152 ret = string_to_ip(CMD_ARGV[1], (uint8_t *)&subnet_mask, &i);
1153 if (ret != ERROR_OK)
1154 return ret;
1155 }
1156 }
1157
1158 if (!subnet_mask)
1159 subnet_mask = (uint32_t)(subnet_bits < 32 ?
1160 ((1ULL << subnet_bits) - 1) : 0xffffffff);
1161
1162 cpy_ip(jlink_cfg.ip_address, (uint8_t *)&ip_address);
1163 cpy_ip(jlink_cfg.subnet_mask, (uint8_t *)&subnet_mask);
1164
1165 return ERROR_OK;
1166 }
1167
1168 COMMAND_HANDLER(jlink_handle_jlink_reset_command)
1169 {
1170 memset(&jlink_cfg, 0xff, sizeof(jlink_cfg));
1171 return ERROR_OK;
1172 }
1173
1174 COMMAND_HANDLER(jlink_handle_jlink_save_command)
1175 {
1176 if (!(jlink_caps & (1 << EMU_CAP_WRITE_CONFIG))) {
1177 command_print(CMD_CTX, "J-Link write emulator configuration not supported");
1178 return ERROR_OK;
1179 }
1180
1181 command_print(CMD_CTX, "The J-Link need to be unpluged and repluged ta have the config effective");
1182 return jlink_set_config(&jlink_cfg);
1183 }
1184
1185 COMMAND_HANDLER(jlink_handle_jlink_usb_address_command)
1186 {
1187 uint32_t address;
1188
1189 if (CMD_ARGC < 1) {
1190 jlink_config_usb_address_dump(CMD_CTX, &jlink_cfg);
1191 return ERROR_OK;
1192 }
1193
1194 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
1195
1196 if (address > 0x3 && address != 0xff) {
1197 command_print(CMD_CTX, "USB Address must be between 0x00 and 0x03 or 0xff");
1198 return ERROR_COMMAND_SYNTAX_ERROR;
1199 }
1200
1201 jlink_cfg.usb_address = address;
1202 return ERROR_OK;
1203 }
1204
1205 COMMAND_HANDLER(jlink_handle_jlink_config_command)
1206 {
1207 struct jlink_config cfg;
1208 int ret = ERROR_OK;
1209
1210 if (CMD_ARGC == 0) {
1211 if (!(jlink_caps & (1 << EMU_CAP_READ_CONFIG))) {
1212 command_print(CMD_CTX, "J-Link read emulator configuration not supported");
1213 goto exit;
1214 }
1215
1216 ret = jlink_get_config(&cfg);
1217
1218 if (ret != ERROR_OK)
1219 command_print(CMD_CTX, "J-Link read emulator configuration failled");
1220 else
1221 jlink_config_dump(CMD_CTX, &jlink_cfg);
1222 }
1223
1224 exit:
1225 return ret;
1226 }
1227
1228 static const struct command_registration jlink_config_subcommand_handlers[] = {
1229 {
1230 .name = "kickstart",
1231 .handler = &jlink_handle_jlink_kickstart_command,
1232 .mode = COMMAND_EXEC,
1233 .help = "set Kickstart power on JTAG-pin 19.",
1234 .usage = "[val]",
1235 },
1236 {
1237 .name = "mac_address",
1238 .handler = &jlink_handle_jlink_mac_address_command,
1239 .mode = COMMAND_EXEC,
1240 .help = "set the MAC Address",
1241 .usage = "[ff:ff:ff:ff:ff:ff]",
1242 },
1243 {
1244 .name = "ip",
1245 .handler = &jlink_handle_jlink_ip_command,
1246 .mode = COMMAND_EXEC,
1247 .help = "set the ip address of the J-Link Pro, "
1248 "where A.B.C.D is the ip, "
1249 "E the bit of the subnet mask, "
1250 "F.G.H.I the subnet mask",
1251 .usage = "[A.B.C.D[/E] [F.G.H.I]]",
1252 },
1253 {
1254 .name = "reset",
1255 .handler = &jlink_handle_jlink_reset_command,
1256 .mode = COMMAND_EXEC,
1257 .help = "reset the current config",
1258 },
1259 {
1260 .name = "save",
1261 .handler = &jlink_handle_jlink_save_command,
1262 .mode = COMMAND_EXEC,
1263 .help = "save the current config",
1264 },
1265 {
1266 .name = "usb_address",
1267 .handler = &jlink_handle_jlink_usb_address_command,
1268 .mode = COMMAND_EXEC,
1269 .help = "set the USB-Address, "
1270 "This will change the product id",
1271 .usage = "[0x00 to 0x03 or 0xff]",
1272 },
1273 COMMAND_REGISTRATION_DONE
1274 };
1275
1276 static const struct command_registration jlink_subcommand_handlers[] = {
1277 {
1278 .name = "caps",
1279 .handler = &jlink_handle_jlink_caps_command,
1280 .mode = COMMAND_EXEC,
1281 .help = "show jlink capabilities",
1282 },
1283 {
1284 .name = "info",
1285 .handler = &jlink_handle_jlink_info_command,
1286 .mode = COMMAND_EXEC,
1287 .help = "show jlink info",
1288 },
1289 {
1290 .name = "hw_jtag",
1291 .handler = &jlink_handle_jlink_hw_jtag_command,
1292 .mode = COMMAND_EXEC,
1293 .help = "access J-Link HW JTAG command version",
1294 .usage = "[2|3]",
1295 },
1296 {
1297 .name = "config",
1298 .handler = &jlink_handle_jlink_config_command,
1299 .mode = COMMAND_EXEC,
1300 .help = "access J-Link configuration, "
1301 "if no argument this will dump the config",
1302 .chain = jlink_config_subcommand_handlers,
1303 },
1304 {
1305 .name = "pid",
1306 .handler = &jlink_pid_command,
1307 .mode = COMMAND_CONFIG,
1308 .help = "set the pid of the interface we want to use",
1309 },
1310 COMMAND_REGISTRATION_DONE
1311 };
1312
1313 static const struct command_registration jlink_command_handlers[] = {
1314 {
1315 .name = "jlink",
1316 .mode = COMMAND_ANY,
1317 .help = "perform jlink management",
1318 .chain = jlink_subcommand_handlers,
1319 },
1320 COMMAND_REGISTRATION_DONE
1321 };
1322
1323 static int jlink_swd_init(void)
1324 {
1325 LOG_INFO("JLink SWD mode enabled");
1326 swd_mode = true;
1327
1328 return ERROR_OK;
1329 }
1330
1331 static void jlink_swd_write_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t value)
1332 {
1333 assert(!(cmd & SWD_CMD_RnW));
1334 jlink_swd_queue_cmd(dap, cmd, NULL, value);
1335 }
1336
1337 static void jlink_swd_read_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t *value)
1338 {
1339 assert(cmd & SWD_CMD_RnW);
1340 jlink_swd_queue_cmd(dap, cmd, value, 0);
1341 }
1342
1343 static int_least32_t jlink_swd_frequency(struct adiv5_dap *dap, int_least32_t hz)
1344 {
1345 if (hz > 0)
1346 jlink_speed(hz);
1347
1348 return hz;
1349 }
1350
1351 static const struct swd_driver jlink_swd = {
1352 .init = jlink_swd_init,
1353 .frequency = jlink_swd_frequency,
1354 .switch_seq = jlink_swd_switch_seq,
1355 .read_reg = jlink_swd_read_reg,
1356 .write_reg = jlink_swd_write_reg,
1357 .run = jlink_swd_run_queue,
1358 };
1359
1360 static const char * const jlink_transports[] = { "jtag", "swd", NULL };
1361
1362 struct jtag_interface jlink_interface = {
1363 .name = "jlink",
1364 .commands = jlink_command_handlers,
1365 .transports = jlink_transports,
1366 .swd = &jlink_swd,
1367
1368 .execute_queue = jlink_execute_queue,
1369 .speed = jlink_speed,
1370 .speed_div = jlink_speed_div,
1371 .khz = jlink_khz,
1372 .init = jlink_init,
1373 .quit = jlink_quit,
1374 };
1375
1376 /***************************************************************************/
1377 /* J-Link tap functions */
1378
1379
1380 static unsigned tap_length;
1381 /* In SWD mode use tms buffer for direction control */
1382 static uint8_t tms_buffer[JLINK_TAP_BUFFER_SIZE];
1383 static uint8_t tdi_buffer[JLINK_TAP_BUFFER_SIZE];
1384 static uint8_t tdo_buffer[JLINK_TAP_BUFFER_SIZE];
1385
1386 struct pending_scan_result {
1387 int first; /* First bit position in tdo_buffer to read */
1388 int length; /* Number of bits to read */
1389 struct scan_command *command; /* Corresponding scan command */
1390 void *buffer;
1391 };
1392
1393 #define MAX_PENDING_SCAN_RESULTS 256
1394
1395 static int pending_scan_results_length;
1396 static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
1397
1398 static void jlink_tap_init(void)
1399 {
1400 tap_length = 0;
1401 pending_scan_results_length = 0;
1402 }
1403
1404 static void jlink_tap_ensure_space(int scans, int bits)
1405 {
1406 int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
1407 int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 32;
1408
1409 if (scans > available_scans || bits > available_bits)
1410 jlink_tap_execute();
1411 }
1412
1413 static void jlink_tap_append_step(int tms, int tdi)
1414 {
1415 int index_var = tap_length / 8;
1416
1417 assert(index_var < JLINK_TAP_BUFFER_SIZE);
1418
1419 int bit_index = tap_length % 8;
1420 uint8_t bit = 1 << bit_index;
1421
1422 /* we do not pad TMS, so be sure to initialize all bits */
1423 if (0 == bit_index)
1424 tms_buffer[index_var] = tdi_buffer[index_var] = 0;
1425
1426 if (tms)
1427 tms_buffer[index_var] |= bit;
1428 else
1429 tms_buffer[index_var] &= ~bit;
1430
1431 if (tdi)
1432 tdi_buffer[index_var] |= bit;
1433 else
1434 tdi_buffer[index_var] &= ~bit;
1435
1436 tap_length++;
1437 }
1438
1439 static void jlink_tap_append_scan(int length, uint8_t *buffer,
1440 struct scan_command *command)
1441 {
1442 struct pending_scan_result *pending_scan_result =
1443 &pending_scan_results_buffer[pending_scan_results_length];
1444 int i;
1445
1446 pending_scan_result->first = tap_length;
1447 pending_scan_result->length = length;
1448 pending_scan_result->command = command;
1449 pending_scan_result->buffer = buffer;
1450
1451 for (i = 0; i < length; i++) {
1452 int tms = (i < (length - 1)) ? 0 : 1;
1453 int tdi = (buffer[i / 8] & (1 << (i % 8))) != 0;
1454 jlink_tap_append_step(tms, tdi);
1455 }
1456 pending_scan_results_length++;
1457 }
1458
1459 /* Pad and send a tap sequence to the device, and receive the answer.
1460 * For the purpose of padding we assume that we are in idle or pause state. */
1461 static int jlink_tap_execute(void)
1462 {
1463 int byte_length;
1464 int i;
1465 int result;
1466
1467 if (!tap_length)
1468 return ERROR_OK;
1469
1470 /* JLink returns an extra NULL in packet when size of incoming
1471 * message is a multiple of 64, creates problems with USB comms.
1472 * WARNING: This will interfere with tap state counting. */
1473 while ((DIV_ROUND_UP(tap_length, 8) % 64) == 0)
1474 jlink_tap_append_step((tap_get_state() == TAP_RESET) ? 1 : 0, 0);
1475
1476 /* number of full bytes (plus one if some would be left over) */
1477 byte_length = DIV_ROUND_UP(tap_length, 8);
1478
1479 bool use_jtag3 = jlink_hw_jtag_version >= 3;
1480 usb_out_buffer[0] = use_jtag3 ? EMU_CMD_HW_JTAG3 : EMU_CMD_HW_JTAG2;
1481 usb_out_buffer[1] = 0;
1482 usb_out_buffer[2] = (tap_length >> 0) & 0xff;
1483 usb_out_buffer[3] = (tap_length >> 8) & 0xff;
1484 memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
1485 memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
1486
1487 jlink_last_state = jtag_debug_state_machine(tms_buffer, tdi_buffer,
1488 tap_length, jlink_last_state);
1489
1490 result = jlink_usb_message(jlink_handle, 4 + 2 * byte_length,
1491 use_jtag3 ? byte_length + 1 : byte_length);
1492 if (result != ERROR_OK) {
1493 LOG_ERROR("jlink_tap_execute failed USB io (%d)", result);
1494 jlink_tap_init();
1495 return ERROR_JTAG_QUEUE_FAILED;
1496 }
1497
1498 result = use_jtag3 ? usb_in_buffer[byte_length] : 0;
1499 if (result != 0) {
1500 LOG_ERROR("jlink_tap_execute failed, result %d (%s)", result,
1501 result == 1 ? "adaptive clocking timeout" : "unknown");
1502 jlink_tap_init();
1503 return ERROR_JTAG_QUEUE_FAILED;
1504 }
1505
1506 memcpy(tdo_buffer, usb_in_buffer, byte_length);
1507
1508 for (i = 0; i < pending_scan_results_length; i++) {
1509 struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i];
1510 uint8_t *buffer = pending_scan_result->buffer;
1511 int length = pending_scan_result->length;
1512 int first = pending_scan_result->first;
1513 struct scan_command *command = pending_scan_result->command;
1514
1515 /* Copy to buffer */
1516 buf_set_buf(tdo_buffer, first, buffer, 0, length);
1517
1518 DEBUG_JTAG_IO("pending scan result, length = %d", length);
1519
1520 jlink_debug_buffer(buffer, DIV_ROUND_UP(length, 8));
1521
1522 if (jtag_read_buffer(buffer, command) != ERROR_OK) {
1523 jlink_tap_init();
1524 return ERROR_JTAG_QUEUE_FAILED;
1525 }
1526
1527 if (pending_scan_result->buffer != NULL)
1528 free(pending_scan_result->buffer);
1529 }
1530
1531 jlink_tap_init();
1532 return ERROR_OK;
1533 }
1534
1535 static void fill_buffer(uint8_t *buf, uint32_t val, uint32_t len)
1536 {
1537 unsigned int tap_pos = tap_length;
1538
1539 while (len > 32) {
1540 buf_set_u32(buf, tap_pos, 32, val);
1541 len -= 32;
1542 tap_pos += 32;
1543 }
1544 if (len)
1545 buf_set_u32(buf, tap_pos, len, val);
1546 }
1547
1548 static void jlink_queue_data_out(const uint8_t *data, uint32_t len)
1549 {
1550 const uint32_t dir_out = 0xffffffff;
1551
1552 if (data)
1553 bit_copy(tdi_buffer, tap_length, data, 0, len);
1554 else
1555 fill_buffer(tdi_buffer, 0, len);
1556 fill_buffer(tms_buffer, dir_out, len);
1557 tap_length += len;
1558 }
1559
1560 static void jlink_queue_data_in(uint32_t len)
1561 {
1562 const uint32_t dir_in = 0;
1563
1564 fill_buffer(tms_buffer, dir_in, len);
1565 tap_length += len;
1566 }
1567
1568 static int jlink_swd_switch_seq(struct adiv5_dap *dap, enum swd_special_seq seq)
1569 {
1570 const uint8_t *s;
1571 unsigned int s_len;
1572
1573 switch (seq) {
1574 case LINE_RESET:
1575 LOG_DEBUG("SWD line reset");
1576 s = swd_seq_line_reset;
1577 s_len = swd_seq_line_reset_len;
1578 break;
1579 case JTAG_TO_SWD:
1580 LOG_DEBUG("JTAG-to-SWD");
1581 s = swd_seq_jtag_to_swd;
1582 s_len = swd_seq_jtag_to_swd_len;
1583 break;
1584 case SWD_TO_JTAG:
1585 LOG_DEBUG("SWD-to-JTAG");
1586 s = swd_seq_swd_to_jtag;
1587 s_len = swd_seq_swd_to_jtag_len;
1588 break;
1589 default:
1590 LOG_ERROR("Sequence %d not supported", seq);
1591 return ERROR_FAIL;
1592 }
1593
1594 jlink_queue_data_out(s, s_len);
1595
1596 return ERROR_OK;
1597 }
1598
1599 static int jlink_swd_run_queue(struct adiv5_dap *dap)
1600 {
1601 LOG_DEBUG("Executing %d queued transactions", pending_scan_results_length);
1602 int retval;
1603
1604 if (queued_retval != ERROR_OK) {
1605 LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
1606 goto skip;
1607 }
1608
1609 /* A transaction must be followed by another transaction or at least 8 idle cycles to
1610 * ensure that data is clocked through the AP. */
1611 jlink_queue_data_out(NULL, 8);
1612
1613 size_t byte_length = DIV_ROUND_UP(tap_length, 8);
1614
1615 /* There's a comment in jlink_tap_execute saying JLink returns
1616 * an extra NULL in packet when size of incoming message is a
1617 * multiple of 64. Someone should verify if that's still the
1618 * case with the current jlink firmware */
1619
1620 usb_out_buffer[0] = EMU_CMD_HW_JTAG3;
1621 usb_out_buffer[1] = 0;
1622 usb_out_buffer[2] = (tap_length >> 0) & 0xff;
1623 usb_out_buffer[3] = (tap_length >> 8) & 0xff;
1624 memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
1625 memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
1626
1627 retval = jlink_usb_message(jlink_handle, 4 + 2 * byte_length,
1628 byte_length + 1);
1629 if (retval != ERROR_OK) {
1630 LOG_ERROR("jlink_swd_run_queue failed USB io (%d)", retval);
1631 goto skip;
1632 }
1633
1634 retval = usb_in_buffer[byte_length];
1635 if (retval) {
1636 LOG_ERROR("jlink_swd_run_queue failed, result %d", retval);
1637 goto skip;
1638 }
1639
1640 for (int i = 0; i < pending_scan_results_length; i++) {
1641 int ack = buf_get_u32(usb_in_buffer, pending_scan_results_buffer[i].first, 3);
1642
1643 if (ack != SWD_ACK_OK) {
1644 LOG_ERROR("SWD ack not OK: %d %s", ack,
1645 ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK");
1646 queued_retval = ack;
1647 goto skip;
1648 } else if (pending_scan_results_buffer[i].length) {
1649 uint32_t data = buf_get_u32(usb_in_buffer, 3 + pending_scan_results_buffer[i].first, 32);
1650 int parity = buf_get_u32(usb_in_buffer, 3 + 32 + pending_scan_results_buffer[i].first, 1);
1651
1652 if (parity != parity_u32(data)) {
1653 LOG_ERROR("SWD Read data parity mismatch");
1654 queued_retval = ERROR_FAIL;
1655 goto skip;
1656 }
1657
1658 if (pending_scan_results_buffer[i].buffer)
1659 *(uint32_t *)pending_scan_results_buffer[i].buffer = data;
1660 }
1661 }
1662
1663 skip:
1664 jlink_tap_init();
1665 retval = queued_retval;
1666 queued_retval = ERROR_OK;
1667
1668 return retval;
1669 }
1670
1671 static void jlink_swd_queue_cmd(struct adiv5_dap *dap, uint8_t cmd, uint32_t *dst, uint32_t data)
1672 {
1673 uint8_t data_parity_trn[DIV_ROUND_UP(32 + 1, 8)];
1674 if (tap_length + 46 + 8 + dap->memaccess_tck >= sizeof(tdi_buffer) * 8 ||
1675 pending_scan_results_length == MAX_PENDING_SCAN_RESULTS) {
1676 /* Not enough room in the queue. Run the queue. */
1677 queued_retval = jlink_swd_run_queue(dap);
1678 }
1679
1680 if (queued_retval != ERROR_OK)
1681 return;
1682
1683 cmd |= SWD_CMD_START | SWD_CMD_PARK;
1684
1685 jlink_queue_data_out(&cmd, 8);
1686
1687 pending_scan_results_buffer[pending_scan_results_length].first = tap_length;
1688
1689 if (cmd & SWD_CMD_RnW) {
1690 /* Queue a read transaction */
1691 pending_scan_results_buffer[pending_scan_results_length].length = 32;
1692 pending_scan_results_buffer[pending_scan_results_length].buffer = dst;
1693
1694 jlink_queue_data_in(1 + 3 + 32 + 1 + 1);
1695 } else {
1696 /* Queue a write transaction */
1697 pending_scan_results_buffer[pending_scan_results_length].length = 0;
1698 jlink_queue_data_in(1 + 3 + 1);
1699
1700 buf_set_u32(data_parity_trn, 0, 32, data);
1701 buf_set_u32(data_parity_trn, 32, 1, parity_u32(data));
1702
1703 jlink_queue_data_out(data_parity_trn, 32 + 1);
1704 }
1705
1706 pending_scan_results_length++;
1707
1708 /* Insert idle cycles after AP accesses to avoid WAIT */
1709 if (cmd & SWD_CMD_APnDP)
1710 jlink_queue_data_out(NULL, dap->memaccess_tck);
1711 }
1712
1713 /*****************************************************************************/
1714 /* JLink USB low-level functions */
1715
1716 static struct jlink *jlink_usb_open()
1717 {
1718 struct jtag_libusb_device_handle *devh;
1719 if (jtag_libusb_open(vids, pids, &devh) != ERROR_OK)
1720 return NULL;
1721
1722 /* BE ***VERY CAREFUL*** ABOUT MAKING CHANGES IN THIS
1723 * AREA!!!!!!!!!!! The behavior of libusb is not completely
1724 * consistent across Windows, Linux, and Mac OS X platforms.
1725 * The actions taken in the following compiler conditionals may
1726 * not agree with published documentation for libusb, but were
1727 * found to be necessary through trials and tribulations. Even
1728 * little tweaks can break one or more platforms, so if you do
1729 * make changes test them carefully on all platforms before
1730 * committing them!
1731 */
1732
1733 #if IS_WIN32 == 0
1734
1735 jtag_libusb_reset_device(devh);
1736
1737 #if IS_DARWIN == 0
1738
1739 int timeout = 5;
1740 /* reopen jlink after usb_reset
1741 * on win32 this may take a second or two to re-enumerate */
1742 int retval;
1743 while ((retval = jtag_libusb_open(vids, pids, &devh)) != ERROR_OK) {
1744 usleep(1000);
1745 timeout--;
1746 if (!timeout)
1747 break;
1748 }
1749 if (ERROR_OK != retval)
1750 return NULL;
1751 #endif
1752
1753 #endif
1754
1755 /* usb_set_configuration required under win32 */
1756 struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
1757 jtag_libusb_set_configuration(devh, 0);
1758 jtag_libusb_claim_interface(devh, 0);
1759
1760 #if 0
1761 /*
1762 * This makes problems under Mac OS X. And is not needed
1763 * under Windows. Hopefully this will not break a linux build
1764 */
1765 usb_set_altinterface(result->usb_handle, 0);
1766 #endif
1767
1768 /* Use the OB endpoints if the JLink we matched is a Jlink-OB adapter */
1769 uint16_t matched_pid;
1770 if (jtag_libusb_get_pid(udev, &matched_pid) == ERROR_OK) {
1771 if (matched_pid == JLINK_OB_PID) {
1772 jlink_read_ep = JLINK_OB_WRITE_ENDPOINT;
1773 jlink_write_ep = JLINK_OB_READ_ENDPOINT;
1774 }
1775 }
1776
1777 jtag_libusb_get_endpoints(udev, &jlink_read_ep, &jlink_write_ep);
1778
1779 struct jlink *result = malloc(sizeof(struct jlink));
1780 result->usb_handle = devh;
1781 return result;
1782 }
1783
1784 static void jlink_usb_close(struct jlink *jlink)
1785 {
1786 jtag_libusb_close(jlink->usb_handle);
1787 free(jlink);
1788 }
1789
1790 /* Send a message and receive the reply. */
1791 static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length)
1792 {
1793 int result;
1794
1795 result = jlink_usb_write(jlink, out_length);
1796 if (result != out_length) {
1797 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1798 out_length, result);
1799 return ERROR_JTAG_DEVICE_ERROR;
1800 }
1801
1802 result = jlink_usb_read(jlink, in_length);
1803 if (result != in_length) {
1804 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1805 in_length, result);
1806 return ERROR_JTAG_DEVICE_ERROR;
1807 }
1808 return ERROR_OK;
1809 }
1810
1811 /* calls the given usb_bulk_* function, allowing for the data to
1812 * trickle in with some timeouts */
1813 static int usb_bulk_with_retries(
1814 int (*f)(jtag_libusb_device_handle *, int, char *, int, int),
1815 jtag_libusb_device_handle *dev, int ep,
1816 char *bytes, int size, int timeout)
1817 {
1818 int tries = 3, count = 0;
1819
1820 while (tries && (count < size)) {
1821 int result = f(dev, ep, bytes + count, size - count, timeout);
1822 if (result > 0)
1823 count += result;
1824 else if ((-ETIMEDOUT != result) || !--tries)
1825 return result;
1826 }
1827 return count;
1828 }
1829
1830 static int wrap_usb_bulk_write(jtag_libusb_device_handle *dev, int ep,
1831 char *buff, int size, int timeout)
1832 {
1833 /* usb_bulk_write() takes const char *buff */
1834 return jtag_libusb_bulk_write(dev, ep, buff, size, timeout);
1835 }
1836
1837 static inline int usb_bulk_write_ex(jtag_libusb_device_handle *dev, int ep,
1838 char *bytes, int size, int timeout)
1839 {
1840 return usb_bulk_with_retries(&wrap_usb_bulk_write,
1841 dev, ep, bytes, size, timeout);
1842 }
1843
1844 static inline int usb_bulk_read_ex(jtag_libusb_device_handle *dev, int ep,
1845 char *bytes, int size, int timeout)
1846 {
1847 return usb_bulk_with_retries(&jtag_libusb_bulk_read,
1848 dev, ep, bytes, size, timeout);
1849 }
1850
1851 /* Write data from out_buffer to USB. */
1852 static int jlink_usb_write(struct jlink *jlink, int out_length)
1853 {
1854 int result;
1855
1856 if (out_length > JLINK_OUT_BUFFER_SIZE) {
1857 LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
1858 out_length, JLINK_OUT_BUFFER_SIZE);
1859 return -1;
1860 }
1861
1862 result = usb_bulk_write_ex(jlink->usb_handle, jlink_write_ep,
1863 (char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
1864
1865 DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
1866 out_length, result);
1867
1868 jlink_debug_buffer(usb_out_buffer, out_length);
1869 return result;
1870 }
1871
1872 /* Read data from USB into in_buffer. */
1873 static int jlink_usb_read(struct jlink *jlink, int expected_size)
1874 {
1875 int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1876 (char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
1877
1878 DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
1879
1880 jlink_debug_buffer(usb_in_buffer, result);
1881 return result;
1882 }
1883
1884 /*
1885 * Send a message and receive the reply - simple messages.
1886 *
1887 * @param jlink pointer to driver data
1888 * @param out_length data length in @c usb_out_buffer
1889 * @param in_length data length to be read to @c usb_in_buffer
1890 */
1891 static int jlink_usb_io(struct jlink *jlink, int out_length, int in_length)
1892 {
1893 int result;
1894
1895 result = jlink_usb_write(jlink, out_length);
1896 if (result != out_length) {
1897 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1898 out_length, result);
1899 return ERROR_JTAG_DEVICE_ERROR;
1900 }
1901
1902 result = jlink_usb_read(jlink, in_length);
1903 if (result != in_length) {
1904 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1905 in_length, result);
1906 return ERROR_JTAG_DEVICE_ERROR;
1907 }
1908
1909 /*
1910 * Section 4.2.4 IN-transaction:
1911 * read dummy 0-byte packet if transaction size is
1912 * multiple of 64 bytes but not max. size of 0x8000
1913 */
1914 if ((in_length % 64) == 0 && in_length != 0x8000) {
1915 char dummy_buffer;
1916 result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
1917 &dummy_buffer, 1, JLINK_USB_TIMEOUT);
1918 if (result != 0) {
1919 LOG_ERROR("dummy byte read failed");
1920 return ERROR_JTAG_DEVICE_ERROR;
1921 }
1922 }
1923 return ERROR_OK;
1924 }
1925
1926 #ifdef _DEBUG_USB_COMMS_
1927 #define BYTES_PER_LINE 16
1928
1929 static void jlink_debug_buffer(uint8_t *buffer, int length)
1930 {
1931 char line[81];
1932 char s[4];
1933 int i;
1934 int j;
1935
1936 for (i = 0; i < length; i += BYTES_PER_LINE) {
1937 snprintf(line, 5, "%04x", i);
1938 for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
1939 snprintf(s, 4, " %02x", buffer[j]);
1940 strcat(line, s);
1941 }
1942 LOG_DEBUG("%s", line);
1943 }
1944 }
1945 #endif