1 /***************************************************************************
2 * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
3 * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * Copyright (C) 2011 by Jean-Christophe PLAGNIOL-VIILARD *
9 * plagnioj@jcrosoft.com *
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. *
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. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
31 #include <jtag/interface.h>
32 #include <jtag/commands.h>
33 #include "libusb_common.h"
35 /* See Segger's public documentation:
36 * Reference manual for J-Link USB Protocol
37 * Document RM08001-R6 Date: June 16, 2009
38 * (Or newer, with some SWD information).
39 * http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
43 * The default pid of the segger is 0x0101
44 * But when you change the USB Address it will also
46 * pid = ( usb_address > 0x4) ? 0x0101 : (0x101 + usb_address)
49 #define VID 0x1366, 0x1366, 0x1366, 0x1366
50 #define PID 0x0101, 0x0102, 0x0103, 0x0104
52 #define JLINK_WRITE_ENDPOINT 0x02
53 #define JLINK_READ_ENDPOINT 0x81
55 static unsigned int jlink_write_ep
= JLINK_WRITE_ENDPOINT
;
56 static unsigned int jlink_read_ep
= JLINK_READ_ENDPOINT
;
57 static unsigned int jlink_hw_jtag_version
= 2;
59 #define JLINK_USB_TIMEOUT 1000
61 /* See Section 3.3.2 of the Segger JLink USB protocol manual */
62 /* 2048 is the max value we can use here */
63 #define JLINK_TAP_BUFFER_SIZE 2048
64 /*#define JLINK_TAP_BUFFER_SIZE 256*/
65 /*#define JLINK_TAP_BUFFER_SIZE 384*/
67 #define JLINK_IN_BUFFER_SIZE 2048
68 #define JLINK_OUT_BUFFER_SIZE (2*2048 + 4)
69 #define JLINK_EMU_RESULT_BUFFER_SIZE 64
71 /* Global USB buffers */
72 static uint8_t usb_in_buffer
[JLINK_IN_BUFFER_SIZE
];
73 static uint8_t usb_out_buffer
[JLINK_OUT_BUFFER_SIZE
];
74 static uint8_t usb_emu_result_buffer
[JLINK_EMU_RESULT_BUFFER_SIZE
];
76 /* Constants for JLink command */
77 #define EMU_CMD_VERSION 0x01
78 #define EMU_CMD_SET_SPEED 0x05
79 #define EMU_CMD_GET_STATE 0x07
80 #define EMU_CMD_HW_CLOCK 0xc8
81 #define EMU_CMD_HW_TMS0 0xc9
82 #define EMU_CMD_HW_TMS1 0xca
83 #define EMU_CMD_HW_JTAG2 0xce
84 #define EMU_CMD_HW_JTAG3 0xcf
85 #define EMU_CMD_GET_MAX_MEM_BLOCK 0xd4
86 #define EMU_CMD_HW_RESET0 0xdc
87 #define EMU_CMD_HW_RESET1 0xdd
88 #define EMU_CMD_HW_TRST0 0xde
89 #define EMU_CMD_HW_TRST1 0xdf
90 #define EMU_CMD_GET_CAPS 0xe8
91 #define EMU_CMD_GET_HW_VERSION 0xf0
92 #define EMU_CMD_READ_CONFIG 0xf2
93 #define EMU_CMD_WRITE_CONFIG 0xf3
95 /* bits return from EMU_CMD_GET_CAPS */
96 #define EMU_CAP_RESERVED_1 0
97 #define EMU_CAP_GET_HW_VERSION 1
98 #define EMU_CAP_WRITE_DCC 2
99 #define EMU_CAP_ADAPTIVE_CLOCKING 3
100 #define EMU_CAP_READ_CONFIG 4
101 #define EMU_CAP_WRITE_CONFIG 5
102 #define EMU_CAP_TRACE 6
103 #define EMU_CAP_WRITE_MEM 7
104 #define EMU_CAP_READ_MEM 8
105 #define EMU_CAP_SPEED_INFO 9
106 #define EMU_CAP_EXEC_CODE 10
107 #define EMU_CAP_GET_MAX_BLOCK_SIZE 11
108 #define EMU_CAP_GET_HW_INFO 12
109 #define EMU_CAP_SET_KS_POWER 13
110 #define EMU_CAP_RESET_STOP_TIMED 14
111 #define EMU_CAP_RESERVED_2 15
112 #define EMU_CAP_MEASURE_RTCK_REACT 16
113 #define EMU_CAP_SELECT_IF 17
114 #define EMU_CAP_RW_MEM_ARM79 18
115 #define EMU_CAP_GET_COUNTERS 19
116 #define EMU_CAP_READ_DCC 20
117 #define EMU_CAP_GET_CPU_CAPS 21
118 #define EMU_CAP_EXEC_CPU_CMD 22
119 #define EMU_CAP_SWO 23
120 #define EMU_CAP_WRITE_DCC_EX 24
121 #define EMU_CAP_UPDATE_FIRMWARE_EX 25
122 #define EMU_CAP_FILE_IO 26
123 #define EMU_CAP_REGISTER 27
124 #define EMU_CAP_INDICATORS 28
125 #define EMU_CAP_TEST_NET_SPEED 29
126 #define EMU_CAP_RAWTRACE 30
127 #define EMU_CAP_RESERVED_3 31
129 static char *jlink_cap_str
[] = {
131 "Supports command EMU_CMD_GET_HARDWARE_VERSION",
132 "Supports command EMU_CMD_WRITE_DCC",
133 "Supports adaptive clocking",
134 "Supports command EMU_CMD_READ_CONFIG",
135 "Supports command EMU_CMD_WRITE_CONFIG",
136 "Supports trace commands",
137 "Supports command EMU_CMD_WRITE_MEM",
138 "Supports command EMU_CMD_READ_MEM",
139 "Supports command EMU_CMD_GET_SPEED",
140 "Supports command EMU_CMD_CODE_...",
141 "Supports command EMU_CMD_GET_MAX_BLOCK_SIZE",
142 "Supports command EMU_CMD_GET_HW_INFO",
143 "Supports command EMU_CMD_SET_KS_POWER",
144 "Supports command EMU_CMD_HW_RELEASE_RESET_STOP_TIMED",
146 "Supports command EMU_CMD_MEASURE_RTCK_REACT",
147 "Supports command EMU_CMD_HW_SELECT_IF",
148 "Supports command EMU_CMD_READ/WRITE_MEM_ARM79",
149 "Supports command EMU_CMD_GET_COUNTERS",
150 "Supports command EMU_CMD_READ_DCC",
151 "Supports command EMU_CMD_GET_CPU_CAPS",
152 "Supports command EMU_CMD_EXEC_CPU_CMD",
153 "Supports command EMU_CMD_SWO",
154 "Supports command EMU_CMD_WRITE_DCC_EX",
155 "Supports command EMU_CMD_UPDATE_FIRMWARE_EX",
156 "Supports command EMU_CMD_FILE_IO",
157 "Supports command EMU_CMD_REGISTER",
158 "Supports command EMU_CMD_INDICATORS",
159 "Supports command EMU_CMD_TEST_NET_SPEED",
160 "Supports command EMU_CMD_RAWTRACE",
164 /* max speed 12MHz v5.0 jlink */
165 #define JLINK_MAX_SPEED 12000
167 /* J-Link hardware versions */
168 #define JLINK_HW_TYPE_JLINK 0
169 #define JLINK_HW_TYPE_JTRACE 1
170 #define JLINK_HW_TYPE_FLASHER 2
171 #define JLINK_HW_TYPE_JLINK_PRO 3
172 #define JLINK_HW_TYPE_MAX 4
174 static char *jlink_hw_type_str
[] = {
181 /* Queue command functions */
182 static void jlink_end_state(tap_state_t state
);
183 static void jlink_state_move(void);
184 static void jlink_path_move(int num_states
, tap_state_t
*path
);
185 static void jlink_runtest(int num_cycles
);
186 static void jlink_scan(bool ir_scan
, enum scan_type type
, uint8_t *buffer
,
187 int scan_size
, struct scan_command
*command
);
188 static void jlink_reset(int trst
, int srst
);
189 static void jlink_simple_command(uint8_t command
);
190 static int jlink_get_status(void);
192 /* J-Link tap buffer functions */
193 static void jlink_tap_init(void);
194 static int jlink_tap_execute(void);
195 static void jlink_tap_ensure_space(int scans
, int bits
);
196 static void jlink_tap_append_step(int tms
, int tdi
);
197 static void jlink_tap_append_scan(int length
, uint8_t *buffer
,
198 struct scan_command
*command
);
200 /* Jlink lowlevel functions */
202 struct jtag_libusb_device_handle
*usb_handle
;
205 static struct jlink
*jlink_usb_open(void);
206 static void jlink_usb_close(struct jlink
*jlink
);
207 static int jlink_usb_message(struct jlink
*jlink
, int out_length
, int in_length
);
208 static int jlink_usb_write(struct jlink
*jlink
, int out_length
);
209 static int jlink_usb_read(struct jlink
*jlink
, int expected_size
);
210 static int jlink_usb_read_emu_result(struct jlink
*jlink
);
212 /* helper functions */
213 static int jlink_get_version_info(void);
215 #ifdef _DEBUG_USB_COMMS_
216 static void jlink_debug_buffer(uint8_t *buffer
, int length
);
218 static inline void jlink_debug_buffer(uint8_t *buffer
, int length
)
223 static enum tap_state jlink_last_state
= TAP_RESET
;
225 static struct jlink
*jlink_handle
;
227 /* pid could be specified at runtime */
228 static uint16_t vids
[] = { VID
, 0 };
229 static uint16_t pids
[] = { PID
, 0 };
231 static uint32_t jlink_caps
;
232 static uint32_t jlink_hw_type
;
234 /* 256 byte non-volatile memory */
235 struct jlink_config
{
237 /* 0ffset 0x01 to 0x03 */
238 uint8_t reserved_1
[3];
239 uint32_t kickstart_power_on_jtag_pin_19
;
240 /* 0ffset 0x08 to 0x1f */
241 uint8_t reserved_2
[24];
242 /* IP only for J-Link Pro */
243 uint8_t ip_address
[4];
244 uint8_t subnet_mask
[4];
245 /* 0ffset 0x28 to 0x2f */
246 uint8_t reserved_3
[8];
247 uint8_t mac_address
[6];
248 /* 0ffset 0x36 to 0xff */
249 uint8_t reserved_4
[202];
250 } __attribute__ ((packed
));
251 struct jlink_config jlink_cfg
;
253 /***************************************************************************/
254 /* External interface implementation */
256 static void jlink_execute_runtest(struct jtag_command
*cmd
)
258 DEBUG_JTAG_IO("runtest %i cycles, end in %i",
259 cmd
->cmd
.runtest
->num_cycles
,
260 cmd
->cmd
.runtest
->end_state
);
262 jlink_end_state(cmd
->cmd
.runtest
->end_state
);
264 jlink_runtest(cmd
->cmd
.runtest
->num_cycles
);
267 static void jlink_execute_statemove(struct jtag_command
*cmd
)
269 DEBUG_JTAG_IO("statemove end in %i", cmd
->cmd
.statemove
->end_state
);
271 jlink_end_state(cmd
->cmd
.statemove
->end_state
);
275 static void jlink_execute_pathmove(struct jtag_command
*cmd
)
277 DEBUG_JTAG_IO("pathmove: %i states, end in %i",
278 cmd
->cmd
.pathmove
->num_states
,
279 cmd
->cmd
.pathmove
->path
[cmd
->cmd
.pathmove
->num_states
- 1]);
281 jlink_path_move(cmd
->cmd
.pathmove
->num_states
,
282 cmd
->cmd
.pathmove
->path
);
285 static void jlink_execute_scan(struct jtag_command
*cmd
)
291 DEBUG_JTAG_IO("scan end in %s", tap_state_name(cmd
->cmd
.scan
->end_state
));
293 jlink_end_state(cmd
->cmd
.scan
->end_state
);
295 scan_size
= jtag_build_buffer(cmd
->cmd
.scan
, &buffer
);
296 DEBUG_JTAG_IO("scan input, length = %d", scan_size
);
298 jlink_debug_buffer(buffer
, (scan_size
+ 7) / 8);
299 type
= jtag_scan_type(cmd
->cmd
.scan
);
300 jlink_scan(cmd
->cmd
.scan
->ir_scan
,
301 type
, buffer
, scan_size
, cmd
->cmd
.scan
);
304 static void jlink_execute_reset(struct jtag_command
*cmd
)
306 DEBUG_JTAG_IO("reset trst: %i srst %i",
307 cmd
->cmd
.reset
->trst
, cmd
->cmd
.reset
->srst
);
310 jlink_reset(cmd
->cmd
.reset
->trst
, cmd
->cmd
.reset
->srst
);
314 static void jlink_execute_sleep(struct jtag_command
*cmd
)
316 DEBUG_JTAG_IO("sleep %" PRIi32
"", cmd
->cmd
.sleep
->us
);
318 jtag_sleep(cmd
->cmd
.sleep
->us
);
321 static void jlink_execute_command(struct jtag_command
*cmd
)
325 jlink_execute_runtest(cmd
);
328 jlink_execute_statemove(cmd
);
331 jlink_execute_pathmove(cmd
);
334 jlink_execute_scan(cmd
);
337 jlink_execute_reset(cmd
);
340 jlink_execute_sleep(cmd
);
343 LOG_ERROR("BUG: unknown JTAG command type encountered");
348 static int jlink_execute_queue(void)
350 struct jtag_command
*cmd
= jtag_command_queue
;
352 while (cmd
!= NULL
) {
353 jlink_execute_command(cmd
);
357 return jlink_tap_execute();
360 /* Sets speed in kHz. */
361 static int jlink_speed(int speed
)
365 if (speed
> JLINK_MAX_SPEED
) {
366 LOG_INFO("reduce speed request: %dkHz to %dkHz maximum",
367 speed
, JLINK_MAX_SPEED
);
368 speed
= JLINK_MAX_SPEED
;
371 /* check for RTCK setting */
375 usb_out_buffer
[0] = EMU_CMD_SET_SPEED
;
376 usb_out_buffer
[1] = (speed
>> 0) & 0xff;
377 usb_out_buffer
[2] = (speed
>> 8) & 0xff;
379 result
= jlink_usb_write(jlink_handle
, 3);
381 LOG_ERROR("J-Link setting speed failed (%d)", result
);
382 return ERROR_JTAG_DEVICE_ERROR
;
388 static int jlink_speed_div(int speed
, int *khz
)
395 static int jlink_khz(int khz
, int *jtag_speed
)
402 static int jlink_init(void)
406 jlink_handle
= jlink_usb_open();
408 if (jlink_handle
== 0) {
409 LOG_ERROR("Cannot find jlink Interface! Please check "
410 "connection and permissions.");
411 return ERROR_JTAG_INIT_FAILED
;
415 * The next three instructions were added after discovering a problem
416 * while using an oscilloscope.
417 * For the V8 SAM-ICE dongle (and likely other j-link device variants),
418 * the reset line to the target microprocessor was found to cycle only
419 * intermittently during emulator startup (even after encountering the
420 * downstream reset instruction later in the code).
421 * This was found to create two issues:
422 * 1) In general it is a bad practice to not reset a CPU to a known
423 * state when starting an emulator and
424 * 2) something critical happens inside the dongle when it does the
425 * first read following a new USB session.
426 * Keeping the processor in reset during the first read collecting
427 * version information seems to prevent errant
428 * "J-Link command EMU_CMD_VERSION failed" issues.
431 LOG_INFO("J-Link initialization started / target CPU reset initiated");
432 jlink_simple_command(EMU_CMD_HW_TRST0
);
433 jlink_simple_command(EMU_CMD_HW_RESET0
);
436 jlink_hw_jtag_version
= 2;
438 if (jlink_get_version_info() == ERROR_OK
) {
439 /* attempt to get status */
443 LOG_INFO("J-Link JTAG Interface ready");
449 /* v5/6 jlink seems to have an issue if the first tap move
450 * is not divisible by 8, so we send a TLR on first power up */
451 for (i
= 0; i
< 8; i
++)
452 jlink_tap_append_step(1, 0);
458 static int jlink_quit(void)
460 jlink_usb_close(jlink_handle
);
464 /***************************************************************************/
465 /* Queue command implementations */
467 static void jlink_end_state(tap_state_t state
)
469 if (tap_is_state_stable(state
))
470 tap_set_end_state(state
);
472 LOG_ERROR("BUG: %i is not a valid end state", state
);
477 /* Goes to the end state. */
478 static void jlink_state_move(void)
482 uint8_t tms_scan
= tap_get_tms_path(tap_get_state(), tap_get_end_state());
483 uint8_t tms_scan_bits
= tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
485 for (i
= 0; i
< tms_scan_bits
; i
++) {
486 tms
= (tms_scan
>> i
) & 1;
487 jlink_tap_append_step(tms
, 0);
490 tap_set_state(tap_get_end_state());
493 static void jlink_path_move(int num_states
, tap_state_t
*path
)
497 for (i
= 0; i
< num_states
; i
++) {
498 if (path
[i
] == tap_state_transition(tap_get_state(), false))
499 jlink_tap_append_step(0, 0);
500 else if (path
[i
] == tap_state_transition(tap_get_state(), true))
501 jlink_tap_append_step(1, 0);
503 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
504 tap_state_name(tap_get_state()), tap_state_name(path
[i
]));
508 tap_set_state(path
[i
]);
511 tap_set_end_state(tap_get_state());
514 static void jlink_runtest(int num_cycles
)
518 tap_state_t saved_end_state
= tap_get_end_state();
520 jlink_tap_ensure_space(1, num_cycles
+ 16);
522 /* only do a state_move when we're not already in IDLE */
523 if (tap_get_state() != TAP_IDLE
) {
524 jlink_end_state(TAP_IDLE
);
529 /* execute num_cycles */
530 for (i
= 0; i
< num_cycles
; i
++)
531 jlink_tap_append_step(0, 0);
533 /* finish in end_state */
534 jlink_end_state(saved_end_state
);
535 if (tap_get_state() != tap_get_end_state())
539 static void jlink_scan(bool ir_scan
, enum scan_type type
, uint8_t *buffer
,
540 int scan_size
, struct scan_command
*command
)
542 tap_state_t saved_end_state
;
544 jlink_tap_ensure_space(1, scan_size
+ 16);
546 saved_end_state
= tap_get_end_state();
548 /* Move to appropriate scan state */
549 jlink_end_state(ir_scan
? TAP_IRSHIFT
: TAP_DRSHIFT
);
551 /* Only move if we're not already there */
552 if (tap_get_state() != tap_get_end_state())
555 jlink_end_state(saved_end_state
);
558 jlink_tap_append_scan(scan_size
, buffer
, command
);
560 /* We are in Exit1, go to Pause */
561 jlink_tap_append_step(0, 0);
563 tap_set_state(ir_scan
? TAP_IRPAUSE
: TAP_DRPAUSE
);
565 if (tap_get_state() != tap_get_end_state())
569 static void jlink_reset(int trst
, int srst
)
571 LOG_DEBUG("trst: %i, srst: %i", trst
, srst
);
573 /* Signals are active low */
575 jlink_simple_command(EMU_CMD_HW_RESET1
);
578 jlink_simple_command(EMU_CMD_HW_RESET0
);
581 jlink_simple_command(EMU_CMD_HW_TRST0
);
584 jlink_simple_command(EMU_CMD_HW_TRST1
);
587 static void jlink_simple_command(uint8_t command
)
591 DEBUG_JTAG_IO("0x%02x", command
);
593 usb_out_buffer
[0] = command
;
594 result
= jlink_usb_write(jlink_handle
, 1);
597 LOG_ERROR("J-Link command 0x%02x failed (%d)", command
, result
);
600 static int jlink_get_status(void)
604 jlink_simple_command(EMU_CMD_GET_STATE
);
606 result
= jlink_usb_read(jlink_handle
, 8);
608 LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result
);
609 return ERROR_JTAG_DEVICE_ERROR
;
612 int vref
= usb_in_buffer
[0] + (usb_in_buffer
[1] << 8);
613 LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
614 vref
/ 1000, vref
% 1000, \
615 usb_in_buffer
[2], usb_in_buffer
[3], usb_in_buffer
[4], \
616 usb_in_buffer
[5], usb_in_buffer
[6], usb_in_buffer
[7]);
619 LOG_ERROR("Vref too low. Check Target Power");
624 #define jlink_dump_printf(context, expr ...) \
627 command_print(context, expr); \
632 static void jlink_caps_dump(struct command_context
*ctx
)
636 jlink_dump_printf(ctx
, "J-Link Capabilities");
638 for (i
= 1; i
< 31; i
++)
639 if (jlink_caps
& (1 << i
))
640 jlink_dump_printf(ctx
, "%s", jlink_cap_str
[i
]);
643 static void jlink_config_usb_address_dump(struct command_context
*ctx
, struct jlink_config
*cfg
)
648 jlink_dump_printf(ctx
, "USB-Address: 0x%x", cfg
->usb_address
);
651 static void jlink_config_kickstart_dump(struct command_context
*ctx
, struct jlink_config
*cfg
)
656 jlink_dump_printf(ctx
, "Kickstart power on JTAG-pin 19: 0x%x",
657 cfg
->kickstart_power_on_jtag_pin_19
);
660 static void jlink_config_mac_address_dump(struct command_context
*ctx
, struct jlink_config
*cfg
)
665 jlink_dump_printf(ctx
, "MAC Address: %.02x:%.02x:%.02x:%.02x:%.02x:%.02x",
666 cfg
->mac_address
[5], cfg
->mac_address
[4],
667 cfg
->mac_address
[3], cfg
->mac_address
[2],
668 cfg
->mac_address
[1], cfg
->mac_address
[0]);
671 static void jlink_config_ip_dump(struct command_context
*ctx
, struct jlink_config
*cfg
)
676 jlink_dump_printf(ctx
, "IP Address: %d.%d.%d.%d",
677 cfg
->ip_address
[3], cfg
->ip_address
[2],
678 cfg
->ip_address
[1], cfg
->ip_address
[0]);
679 jlink_dump_printf(ctx
, "Subnet Mask: %d.%d.%d.%d",
680 cfg
->subnet_mask
[3], cfg
->subnet_mask
[2],
681 cfg
->subnet_mask
[1], cfg
->subnet_mask
[0]);
684 static void jlink_config_dump(struct command_context
*ctx
, struct jlink_config
*cfg
)
689 jlink_dump_printf(ctx
, "J-Link configuration");
690 jlink_config_usb_address_dump(ctx
, cfg
);
691 jlink_config_kickstart_dump(ctx
, cfg
);
693 if (jlink_hw_type
== JLINK_HW_TYPE_JLINK_PRO
) {
694 jlink_config_ip_dump(ctx
, cfg
);
695 jlink_config_mac_address_dump(ctx
, cfg
);
699 static int jlink_get_config(struct jlink_config
*cfg
)
702 int size
= sizeof(struct jlink_config
);
704 jlink_simple_command(EMU_CMD_READ_CONFIG
);
706 result
= jlink_usb_read(jlink_handle
, size
);
707 if (size
!= result
) {
708 LOG_ERROR("jlink_usb_read failed (requested=%d, result=%d)", size
, result
);
712 memcpy(cfg
, usb_in_buffer
, size
);
715 * Section 4.2.4 IN-transaction
716 * read dummy 0-byte packet
718 jlink_usb_read(jlink_handle
, 1);
723 static int jlink_set_config(struct jlink_config
*cfg
)
726 int size
= sizeof(struct jlink_config
);
728 jlink_simple_command(EMU_CMD_WRITE_CONFIG
);
730 memcpy(usb_out_buffer
, cfg
, size
);
732 result
= jlink_usb_write(jlink_handle
, size
);
733 if (result
!= size
) {
734 LOG_ERROR("jlink_usb_write failed (requested=%d, result=%d)", 256, result
);
741 static int jlink_get_version_info(void)
745 uint32_t jlink_max_size
;
747 /* query hardware version */
748 jlink_simple_command(EMU_CMD_VERSION
);
750 result
= jlink_usb_read(jlink_handle
, 2);
752 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result
);
753 return ERROR_JTAG_DEVICE_ERROR
;
756 len
= buf_get_u32(usb_in_buffer
, 0, 16);
757 if (len
> JLINK_IN_BUFFER_SIZE
) {
758 LOG_ERROR("J-Link command EMU_CMD_VERSION impossible return length 0x%0x", len
);
759 len
= JLINK_IN_BUFFER_SIZE
;
762 result
= jlink_usb_read(jlink_handle
, len
);
764 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result
);
765 return ERROR_JTAG_DEVICE_ERROR
;
768 usb_in_buffer
[result
] = 0;
769 LOG_INFO("%s", (char *)usb_in_buffer
);
771 /* query hardware capabilities */
772 jlink_simple_command(EMU_CMD_GET_CAPS
);
774 result
= jlink_usb_read(jlink_handle
, 4);
776 LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result
);
777 return ERROR_JTAG_DEVICE_ERROR
;
780 jlink_caps
= buf_get_u32(usb_in_buffer
, 0, 32);
781 LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps
);
783 if (jlink_caps
& (1 << EMU_CAP_GET_HW_VERSION
)) {
784 /* query hardware version */
785 jlink_simple_command(EMU_CMD_GET_HW_VERSION
);
787 result
= jlink_usb_read(jlink_handle
, 4);
789 LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result
);
790 return ERROR_JTAG_DEVICE_ERROR
;
793 uint32_t jlink_hw_version
= buf_get_u32(usb_in_buffer
, 0, 32);
794 uint32_t major_revision
= (jlink_hw_version
/ 10000) % 100;
795 jlink_hw_type
= (jlink_hw_version
/ 1000000) % 100;
796 if (major_revision
>= 5)
797 jlink_hw_jtag_version
= 3;
799 LOG_INFO("J-Link hw version %i", (int)jlink_hw_version
);
801 if (jlink_hw_type
>= JLINK_HW_TYPE_MAX
)
802 LOG_INFO("J-Link hw type uknown 0x%x", jlink_hw_type
);
804 LOG_INFO("J-Link hw type %s", jlink_hw_type_str
[jlink_hw_type
]);
807 if (jlink_caps
& (1 << EMU_CAP_GET_MAX_BLOCK_SIZE
)) {
808 /* query hardware maximum memory block */
809 jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK
);
811 result
= jlink_usb_read(jlink_handle
, 4);
813 LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result
);
814 return ERROR_JTAG_DEVICE_ERROR
;
817 jlink_max_size
= buf_get_u32(usb_in_buffer
, 0, 32);
818 LOG_INFO("J-Link max mem block %i", (int)jlink_max_size
);
821 if (jlink_caps
& (1 << EMU_CAP_READ_CONFIG
)) {
822 if (jlink_get_config(&jlink_cfg
) != ERROR_OK
)
823 return ERROR_JTAG_DEVICE_ERROR
;
825 jlink_config_dump(NULL
, &jlink_cfg
);
831 COMMAND_HANDLER(jlink_pid_command
)
834 LOG_ERROR("Need exactly one argument to jlink_pid");
838 pids
[0] = strtoul(CMD_ARGV
[0], NULL
, 16);
845 COMMAND_HANDLER(jlink_handle_jlink_info_command
)
847 if (jlink_get_version_info() == ERROR_OK
) {
848 /* attempt to get status */
855 COMMAND_HANDLER(jlink_handle_jlink_caps_command
)
857 jlink_caps_dump(CMD_CTX
);
862 COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command
)
866 command_print(CMD_CTX
, "J-Link hw jtag %i", jlink_hw_jtag_version
);
869 int request_version
= atoi(CMD_ARGV
[0]);
870 switch (request_version
) {
873 jlink_hw_jtag_version
= request_version
;
876 return ERROR_COMMAND_SYNTAX_ERROR
;
881 return ERROR_COMMAND_SYNTAX_ERROR
;
887 COMMAND_HANDLER(jlink_handle_jlink_kickstart_command
)
892 jlink_config_kickstart_dump(CMD_CTX
, &jlink_cfg
);
896 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], kickstart
);
898 jlink_cfg
.kickstart_power_on_jtag_pin_19
= kickstart
;
902 COMMAND_HANDLER(jlink_handle_jlink_mac_address_command
)
910 jlink_config_mac_address_dump(CMD_CTX
, &jlink_cfg
);
916 if ((strlen(str
) != 17) || (str
[2] != ':' || str
[5] != ':' || str
[8] != ':' ||
917 str
[11] != ':' || str
[14] != ':')) {
918 command_print(CMD_CTX
, "ethaddr miss format ff:ff:ff:ff:ff:ff");
919 return ERROR_COMMAND_SYNTAX_ERROR
;
922 for (i
= 5; i
>= 0; i
--) {
923 addr
[i
] = strtoul(str
, &e
, 16);
927 if (!(addr
[0] | addr
[1] | addr
[2] | addr
[3] | addr
[4] | addr
[5])) {
928 command_print(CMD_CTX
, "invalid it's zero mac_address");
929 return ERROR_COMMAND_SYNTAX_ERROR
;
932 if (!(0x01 & addr
[0])) {
933 command_print(CMD_CTX
, "invalid it's a multicat mac_address");
934 return ERROR_COMMAND_SYNTAX_ERROR
;
937 memcpy(jlink_cfg
.mac_address
, addr
, sizeof(addr
));
942 static int string_to_ip(const char *s
, uint8_t *ip
, int *pos
)
946 const char *s_save
= s
;
952 for (i
= 0; i
< 4; i
++) {
953 lip
[i
] = strtoul(s
, &e
, 10);
955 if (*e
!= '.' && i
!= 3)
963 memcpy(ip
, lip
, sizeof(lip
));
967 static void cpy_ip(uint8_t *dst
, uint8_t *src
)
971 for (i
= 0, j
= 3; i
< 4; i
++, j
--)
975 COMMAND_HANDLER(jlink_handle_jlink_ip_command
)
978 uint32_t subnet_mask
= 0;
981 uint8_t subnet_bits
= 24;
984 jlink_config_ip_dump(CMD_CTX
, &jlink_cfg
);
988 ret
= string_to_ip(CMD_ARGV
[0], (uint8_t *)&ip_address
, &i
);
992 len
= strlen(CMD_ARGV
[0]);
994 /* check for this format A.B.C.D/E */
997 if (CMD_ARGV
[0][i
] != '/')
998 return ERROR_COMMAND_SYNTAX_ERROR
;
1000 COMMAND_PARSE_NUMBER(u8
, CMD_ARGV
[0] + i
+ 1, subnet_bits
);
1003 ret
= string_to_ip(CMD_ARGV
[1], (uint8_t *)&subnet_mask
, &i
);
1004 if (ret
!= ERROR_OK
)
1010 subnet_mask
= (uint32_t)(subnet_bits
< 32 ?
1011 ((1ULL << subnet_bits
) - 1) : 0xffffffff);
1013 cpy_ip(jlink_cfg
.ip_address
, (uint8_t *)&ip_address
);
1014 cpy_ip(jlink_cfg
.subnet_mask
, (uint8_t *)&subnet_mask
);
1019 COMMAND_HANDLER(jlink_handle_jlink_reset_command
)
1021 memset(&jlink_cfg
, 0xff, sizeof(jlink_cfg
));
1025 COMMAND_HANDLER(jlink_handle_jlink_save_command
)
1027 if (!(jlink_caps
& (1 << EMU_CAP_WRITE_CONFIG
))) {
1028 command_print(CMD_CTX
, "J-Link write emulator configuration not supported");
1032 command_print(CMD_CTX
, "The J-Link need to be unpluged and repluged ta have the config effective");
1033 return jlink_set_config(&jlink_cfg
);
1036 COMMAND_HANDLER(jlink_handle_jlink_usb_address_command
)
1041 jlink_config_usb_address_dump(CMD_CTX
, &jlink_cfg
);
1045 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], address
);
1047 if (address
> 0x3 && address
!= 0xff) {
1048 command_print(CMD_CTX
, "USB Address must be between 0x00 and 0x03 or 0xff");
1049 return ERROR_COMMAND_SYNTAX_ERROR
;
1052 jlink_cfg
.usb_address
= address
;
1056 COMMAND_HANDLER(jlink_handle_jlink_config_command
)
1058 struct jlink_config cfg
;
1061 if (CMD_ARGC
== 0) {
1062 if (!(jlink_caps
& (1 << EMU_CAP_READ_CONFIG
))) {
1063 command_print(CMD_CTX
, "J-Link read emulator configuration not supported");
1067 ret
= jlink_get_config(&cfg
);
1069 if (ret
!= ERROR_OK
)
1070 command_print(CMD_CTX
, "J-Link read emulator configuration failled");
1072 jlink_config_dump(CMD_CTX
, &jlink_cfg
);
1079 static const struct command_registration jlink_config_subcommand_handlers
[] = {
1081 .name
= "kickstart",
1082 .handler
= &jlink_handle_jlink_kickstart_command
,
1083 .mode
= COMMAND_EXEC
,
1084 .help
= "set Kickstart power on JTAG-pin 19.",
1088 .name
= "mac_address",
1089 .handler
= &jlink_handle_jlink_mac_address_command
,
1090 .mode
= COMMAND_EXEC
,
1091 .help
= "set the MAC Address",
1092 .usage
= "[ff:ff:ff:ff:ff:ff]",
1096 .handler
= &jlink_handle_jlink_ip_command
,
1097 .mode
= COMMAND_EXEC
,
1098 .help
= "set the ip address of the J-Link Pro, "
1099 "where A.B.C.D is the ip, "
1100 "E the bit of the subnet mask, "
1101 "F.G.H.I the subnet mask",
1102 .usage
= "[A.B.C.D[/E] [F.G.H.I]]",
1106 .handler
= &jlink_handle_jlink_reset_command
,
1107 .mode
= COMMAND_EXEC
,
1108 .help
= "reset the current config",
1112 .handler
= &jlink_handle_jlink_save_command
,
1113 .mode
= COMMAND_EXEC
,
1114 .help
= "save the current config",
1117 .name
= "usb_address",
1118 .handler
= &jlink_handle_jlink_usb_address_command
,
1119 .mode
= COMMAND_EXEC
,
1120 .help
= "set the USB-Address, "
1121 "This will change the product id",
1122 .usage
= "[0x00 to 0x03 or 0xff]",
1124 COMMAND_REGISTRATION_DONE
1127 static const struct command_registration jlink_subcommand_handlers
[] = {
1130 .handler
= &jlink_handle_jlink_caps_command
,
1131 .mode
= COMMAND_EXEC
,
1132 .help
= "show jlink capabilities",
1136 .handler
= &jlink_handle_jlink_info_command
,
1137 .mode
= COMMAND_EXEC
,
1138 .help
= "show jlink info",
1142 .handler
= &jlink_handle_jlink_hw_jtag_command
,
1143 .mode
= COMMAND_EXEC
,
1144 .help
= "access J-Link HW JTAG command version",
1149 .handler
= &jlink_handle_jlink_config_command
,
1150 .mode
= COMMAND_EXEC
,
1151 .help
= "access J-Link configuration, "
1152 "if no argument this will dump the config",
1153 .chain
= jlink_config_subcommand_handlers
,
1157 .handler
= &jlink_pid_command
,
1158 .mode
= COMMAND_CONFIG
,
1159 .help
= "set the pid of the interface we want to use",
1161 COMMAND_REGISTRATION_DONE
1164 static const struct command_registration jlink_command_handlers
[] = {
1167 .mode
= COMMAND_ANY
,
1168 .help
= "perform jlink management",
1169 .chain
= jlink_subcommand_handlers
,
1171 COMMAND_REGISTRATION_DONE
1174 struct jtag_interface jlink_interface
= {
1176 .commands
= jlink_command_handlers
,
1178 .execute_queue
= jlink_execute_queue
,
1179 .speed
= jlink_speed
,
1180 .speed_div
= jlink_speed_div
,
1186 /***************************************************************************/
1187 /* J-Link tap functions */
1190 static unsigned tap_length
;
1191 static uint8_t tms_buffer
[JLINK_TAP_BUFFER_SIZE
];
1192 static uint8_t tdi_buffer
[JLINK_TAP_BUFFER_SIZE
];
1193 static uint8_t tdo_buffer
[JLINK_TAP_BUFFER_SIZE
];
1195 struct pending_scan_result
{
1196 int first
; /* First bit position in tdo_buffer to read */
1197 int length
; /* Number of bits to read */
1198 struct scan_command
*command
; /* Corresponding scan command */
1202 #define MAX_PENDING_SCAN_RESULTS 256
1204 static int pending_scan_results_length
;
1205 static struct pending_scan_result pending_scan_results_buffer
[MAX_PENDING_SCAN_RESULTS
];
1207 static void jlink_tap_init(void)
1210 pending_scan_results_length
= 0;
1213 static void jlink_tap_ensure_space(int scans
, int bits
)
1215 int available_scans
= MAX_PENDING_SCAN_RESULTS
- pending_scan_results_length
;
1216 int available_bits
= JLINK_TAP_BUFFER_SIZE
* 8 - tap_length
- 32;
1218 if (scans
> available_scans
|| bits
> available_bits
)
1219 jlink_tap_execute();
1222 static void jlink_tap_append_step(int tms
, int tdi
)
1224 int index_var
= tap_length
/ 8;
1226 if (index_var
>= JLINK_TAP_BUFFER_SIZE
) {
1227 LOG_ERROR("jlink_tap_append_step: overflow");
1228 *(uint32_t *)0xFFFFFFFF = 0;
1232 int bit_index
= tap_length
% 8;
1233 uint8_t bit
= 1 << bit_index
;
1235 /* we do not pad TMS, so be sure to initialize all bits */
1237 tms_buffer
[index_var
] = tdi_buffer
[index_var
] = 0;
1240 tms_buffer
[index_var
] |= bit
;
1242 tms_buffer
[index_var
] &= ~bit
;
1245 tdi_buffer
[index_var
] |= bit
;
1247 tdi_buffer
[index_var
] &= ~bit
;
1252 static void jlink_tap_append_scan(int length
, uint8_t *buffer
,
1253 struct scan_command
*command
)
1255 struct pending_scan_result
*pending_scan_result
=
1256 &pending_scan_results_buffer
[pending_scan_results_length
];
1259 pending_scan_result
->first
= tap_length
;
1260 pending_scan_result
->length
= length
;
1261 pending_scan_result
->command
= command
;
1262 pending_scan_result
->buffer
= buffer
;
1264 for (i
= 0; i
< length
; i
++) {
1265 int tms
= (i
< (length
- 1)) ? 0 : 1;
1266 int tdi
= (buffer
[i
/ 8] & (1 << (i
% 8))) != 0;
1267 jlink_tap_append_step(tms
, tdi
);
1269 pending_scan_results_length
++;
1272 /* Pad and send a tap sequence to the device, and receive the answer.
1273 * For the purpose of padding we assume that we are in idle or pause state. */
1274 static int jlink_tap_execute(void)
1283 /* JLink returns an extra NULL in packet when size of incoming
1284 * message is a multiple of 64, creates problems with USB comms.
1285 * WARNING: This will interfere with tap state counting. */
1286 while ((DIV_ROUND_UP(tap_length
, 8) % 64) == 0)
1287 jlink_tap_append_step((tap_get_state() == TAP_RESET
) ? 1 : 0, 0);
1289 /* number of full bytes (plus one if some would be left over) */
1290 byte_length
= DIV_ROUND_UP(tap_length
, 8);
1292 bool use_jtag3
= jlink_hw_jtag_version
>= 3;
1293 usb_out_buffer
[0] = use_jtag3
? EMU_CMD_HW_JTAG3
: EMU_CMD_HW_JTAG2
;
1294 usb_out_buffer
[1] = 0;
1295 usb_out_buffer
[2] = (tap_length
>> 0) & 0xff;
1296 usb_out_buffer
[3] = (tap_length
>> 8) & 0xff;
1297 memcpy(usb_out_buffer
+ 4, tms_buffer
, byte_length
);
1298 memcpy(usb_out_buffer
+ 4 + byte_length
, tdi_buffer
, byte_length
);
1300 jlink_last_state
= jtag_debug_state_machine(tms_buffer
, tdi_buffer
,
1301 tap_length
, jlink_last_state
);
1303 result
= jlink_usb_message(jlink_handle
, 4 + 2 * byte_length
, byte_length
);
1304 if (result
!= byte_length
) {
1305 LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)",
1306 result
, byte_length
);
1308 return ERROR_JTAG_QUEUE_FAILED
;
1311 memcpy(tdo_buffer
, usb_in_buffer
, byte_length
);
1313 for (i
= 0; i
< pending_scan_results_length
; i
++) {
1314 struct pending_scan_result
*pending_scan_result
= &pending_scan_results_buffer
[i
];
1315 uint8_t *buffer
= pending_scan_result
->buffer
;
1316 int length
= pending_scan_result
->length
;
1317 int first
= pending_scan_result
->first
;
1318 struct scan_command
*command
= pending_scan_result
->command
;
1320 /* Copy to buffer */
1321 buf_set_buf(tdo_buffer
, first
, buffer
, 0, length
);
1323 DEBUG_JTAG_IO("pending scan result, length = %d", length
);
1325 jlink_debug_buffer(buffer
, DIV_ROUND_UP(length
, 8));
1327 if (jtag_read_buffer(buffer
, command
) != ERROR_OK
) {
1329 return ERROR_JTAG_QUEUE_FAILED
;
1332 if (pending_scan_result
->buffer
!= NULL
)
1333 free(pending_scan_result
->buffer
);
1340 /*****************************************************************************/
1341 /* JLink USB low-level functions */
1343 static struct jlink
*jlink_usb_open()
1345 struct jtag_libusb_device_handle
*devh
;
1346 if (jtag_libusb_open(vids
, pids
, &devh
) != ERROR_OK
)
1349 /* BE ***VERY CAREFUL*** ABOUT MAKING CHANGES IN THIS
1350 * AREA!!!!!!!!!!! The behavior of libusb is not completely
1351 * consistent across Windows, Linux, and Mac OS X platforms.
1352 * The actions taken in the following compiler conditionals may
1353 * not agree with published documentation for libusb, but were
1354 * found to be necessary through trials and tribulations. Even
1355 * little tweaks can break one or more platforms, so if you do
1356 * make changes test them carefully on all platforms before
1362 jtag_libusb_reset_device(devh
);
1367 /* reopen jlink after usb_reset
1368 * on win32 this may take a second or two to re-enumerate */
1370 while ((retval
= jtag_libusb_open(vids
, pids
, &devh
)) != ERROR_OK
) {
1376 if (ERROR_OK
!= retval
)
1382 /* usb_set_configuration required under win32 */
1383 struct jtag_libusb_device
*udev
= jtag_libusb_get_device(devh
);
1384 jtag_libusb_set_configuration(devh
, 0);
1385 jtag_libusb_claim_interface(devh
, 0);
1389 * This makes problems under Mac OS X. And is not needed
1390 * under Windows. Hopefully this will not break a linux build
1392 usb_set_altinterface(result
->usb_handle
, 0);
1395 jtag_libusb_get_endpoints(udev
, &jlink_read_ep
, &jlink_write_ep
);
1397 struct jlink
*result
= malloc(sizeof(struct jlink
));
1398 result
->usb_handle
= devh
;
1402 static void jlink_usb_close(struct jlink
*jlink
)
1404 jtag_libusb_close(jlink
->usb_handle
);
1408 /* Send a message and receive the reply. */
1409 static int jlink_usb_message(struct jlink
*jlink
, int out_length
, int in_length
)
1413 result
= jlink_usb_write(jlink
, out_length
);
1414 if (result
!= out_length
) {
1415 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
1416 out_length
, result
);
1417 return ERROR_JTAG_DEVICE_ERROR
;
1420 result
= jlink_usb_read(jlink
, in_length
);
1421 if ((result
!= in_length
) && (result
!= (in_length
+ 1))) {
1422 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
1424 return ERROR_JTAG_DEVICE_ERROR
;
1427 if (jlink_hw_jtag_version
< 3)
1430 int result2
= ERROR_OK
;
1431 if (result
== in_length
) {
1432 /* Must read the result from the EMU too */
1433 result2
= jlink_usb_read_emu_result(jlink
);
1435 LOG_ERROR("jlink_usb_read_emu_result retried requested = 1, "
1436 "result=%d, in_length=%i", result2
, in_length
);
1437 /* Try again once, should only happen if (in_length%64 == 0) */
1438 result2
= jlink_usb_read_emu_result(jlink
);
1440 LOG_ERROR("jlink_usb_read_emu_result failed "
1441 "(requested = 1, result=%d)", result2
);
1442 return ERROR_JTAG_DEVICE_ERROR
;
1446 /* Check the result itself */
1447 result2
= usb_emu_result_buffer
[0];
1449 /* Save the result, then remove it from return value */
1450 result2
= usb_in_buffer
[result
--];
1454 LOG_ERROR("jlink_usb_message failed with result=%d)", result2
);
1455 return ERROR_JTAG_DEVICE_ERROR
;
1461 /* calls the given usb_bulk_* function, allowing for the data to
1462 * trickle in with some timeouts */
1463 static int usb_bulk_with_retries(
1464 int (*f
)(jtag_libusb_device_handle
*, int, char *, int, int),
1465 jtag_libusb_device_handle
*dev
, int ep
,
1466 char *bytes
, int size
, int timeout
)
1468 int tries
= 3, count
= 0;
1470 while (tries
&& (count
< size
)) {
1471 int result
= f(dev
, ep
, bytes
+ count
, size
- count
, timeout
);
1474 else if ((-ETIMEDOUT
!= result
) || !--tries
)
1480 static int wrap_usb_bulk_write(jtag_libusb_device_handle
*dev
, int ep
,
1481 char *buff
, int size
, int timeout
)
1483 /* usb_bulk_write() takes const char *buff */
1484 return jtag_libusb_bulk_write(dev
, ep
, buff
, size
, timeout
);
1487 static inline int usb_bulk_write_ex(jtag_libusb_device_handle
*dev
, int ep
,
1488 char *bytes
, int size
, int timeout
)
1490 return usb_bulk_with_retries(&wrap_usb_bulk_write
,
1491 dev
, ep
, bytes
, size
, timeout
);
1494 static inline int usb_bulk_read_ex(jtag_libusb_device_handle
*dev
, int ep
,
1495 char *bytes
, int size
, int timeout
)
1497 return usb_bulk_with_retries(&jtag_libusb_bulk_read
,
1498 dev
, ep
, bytes
, size
, timeout
);
1501 /* Write data from out_buffer to USB. */
1502 static int jlink_usb_write(struct jlink
*jlink
, int out_length
)
1506 if (out_length
> JLINK_OUT_BUFFER_SIZE
) {
1507 LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
1508 out_length
, JLINK_OUT_BUFFER_SIZE
);
1512 result
= usb_bulk_write_ex(jlink
->usb_handle
, jlink_write_ep
,
1513 (char *)usb_out_buffer
, out_length
, JLINK_USB_TIMEOUT
);
1515 DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
1516 out_length
, result
);
1518 jlink_debug_buffer(usb_out_buffer
, out_length
);
1522 /* Read data from USB into in_buffer. */
1523 static int jlink_usb_read(struct jlink
*jlink
, int expected_size
)
1525 int result
= usb_bulk_read_ex(jlink
->usb_handle
, jlink_read_ep
,
1526 (char *)usb_in_buffer
, expected_size
, JLINK_USB_TIMEOUT
);
1528 DEBUG_JTAG_IO("jlink_usb_read, result = %d", result
);
1530 jlink_debug_buffer(usb_in_buffer
, result
);
1534 /* Read the result from the previous EMU cmd into result_buffer. */
1535 static int jlink_usb_read_emu_result(struct jlink
*jlink
)
1537 int result
= usb_bulk_read_ex(jlink
->usb_handle
, jlink_read_ep
,
1538 (char *)usb_emu_result_buffer
, 1 /* JLINK_EMU_RESULT_BUFFER_SIZE */,
1541 DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result
);
1543 jlink_debug_buffer(usb_emu_result_buffer
, result
);
1547 #ifdef _DEBUG_USB_COMMS_
1548 #define BYTES_PER_LINE 16
1550 static void jlink_debug_buffer(uint8_t *buffer
, int length
)
1557 for (i
= 0; i
< length
; i
+= BYTES_PER_LINE
) {
1558 snprintf(line
, 5, "%04x", i
);
1559 for (j
= i
; j
< i
+ BYTES_PER_LINE
&& j
< length
; j
++) {
1560 snprintf(s
, 4, " %02x", buffer
[j
]);
1563 LOG_DEBUG("%s", line
);
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