1 /***************************************************************************
2 * Copyright (C) 2009 Zachary T Welch *
3 * zw@superlucidity.net *
5 * Copyright (C) 2007,2008,2009 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2009 SoftPLC Corporation *
12 * Copyright (C) 2005 by Dominic Rath *
13 * Dominic.Rath@gmx.de *
15 * This program is free software; you can redistribute it and/or modify *
16 * it under the terms of the GNU General Public License as published by *
17 * the Free Software Foundation; either version 2 of the License, or *
18 * (at your option) any later version. *
20 * This program is distributed in the hope that it will be useful, *
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
23 * GNU General Public License for more details. *
25 * You should have received a copy of the GNU General Public License *
26 * along with this program; if not, write to the *
27 * Free Software Foundation, Inc., *
28 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
29 ***************************************************************************/
35 #include "interface.h"
42 /// The number of JTAG queue flushes (for profiling and debugging purposes).
43 static int jtag_flush_queue_count
;
45 static void jtag_add_scan_check(void (*jtag_add_scan
)(int in_num_fields
, const struct scan_field
*in_fields
, tap_state_t state
),
46 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
);
49 * The jtag_error variable is set when an error occurs while executing
50 * the queue. Application code may set this using jtag_set_error(),
51 * when an error occurs during processing that should be reported during
52 * jtag_execute_queue().
54 * Tts value may be checked with jtag_get_error() and cleared with
55 * jtag_error_clear(). This value is returned (and cleared) by
56 * jtag_execute_queue().
58 static int jtag_error
= ERROR_OK
;
60 static const char *jtag_event_strings
[] =
62 [JTAG_TRST_ASSERTED
] = "TAP reset",
63 [JTAG_TAP_EVENT_SETUP
] = "TAP setup",
64 [JTAG_TAP_EVENT_ENABLE
] = "TAP enabled",
65 [JTAG_TAP_EVENT_DISABLE
] = "TAP disabled",
69 * JTAG adapters must initialize with TRST and SRST de-asserted
70 * (they're negative logic, so that means *high*). But some
71 * hardware doesn't necessarily work that way ... so set things
72 * up so that jtag_init() always forces that state.
74 static int jtag_trst
= -1;
75 static int jtag_srst
= -1;
78 * List all TAPs that have been created.
80 static struct jtag_tap
*__jtag_all_taps
= NULL
;
82 * The number of TAPs in the __jtag_all_taps list, used to track the
83 * assigned chain position to new TAPs
85 static unsigned jtag_num_taps
= 0;
87 static enum reset_types jtag_reset_config
= RESET_NONE
;
88 static tap_state_t cmd_queue_end_state
= TAP_RESET
;
89 tap_state_t cmd_queue_cur_state
= TAP_RESET
;
91 static bool jtag_verify_capture_ir
= true;
92 static int jtag_verify
= 1;
94 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
95 static int jtag_nsrst_delay
= 0; /* default to no nSRST delay */
96 static int jtag_ntrst_delay
= 0; /* default to no nTRST delay */
97 static int jtag_nsrst_assert_width
= 0; /* width of assertion */
98 static int jtag_ntrst_assert_width
= 0; /* width of assertion */
101 * Contains a single callback along with a pointer that will be passed
102 * when an event occurs.
104 struct jtag_event_callback
{
106 jtag_event_handler_t callback
;
107 /// the private data to pass to the callback
109 /// the next callback
110 struct jtag_event_callback
* next
;
113 /* callbacks to inform high-level handlers about JTAG state changes */
114 static struct jtag_event_callback
*jtag_event_callbacks
;
117 static int speed_khz
= 0;
118 /* speed to fallback to when RCLK is requested but not supported */
119 static int rclk_fallback_speed_khz
= 0;
120 static enum {CLOCK_MODE_SPEED
, CLOCK_MODE_KHZ
, CLOCK_MODE_RCLK
} clock_mode
;
121 static int jtag_speed
= 0;
123 static struct jtag_interface
*jtag
= NULL
;
126 struct jtag_interface
*jtag_interface
= NULL
;
128 void jtag_set_error(int error
)
130 if ((error
== ERROR_OK
) || (jtag_error
!= ERROR_OK
))
134 int jtag_get_error(void)
138 int jtag_error_clear(void)
140 int temp
= jtag_error
;
141 jtag_error
= ERROR_OK
;
147 static bool jtag_poll
= 1;
149 bool is_jtag_poll_safe(void)
151 /* Polling can be disabled explicitly with set_enabled(false).
152 * It is also implicitly disabled while TRST is active and
153 * while SRST is gating the JTAG clock.
155 if (!jtag_poll
|| jtag_trst
!= 0)
157 return jtag_srst
== 0 || (jtag_reset_config
& RESET_SRST_NO_GATING
);
160 bool jtag_poll_get_enabled(void)
165 void jtag_poll_set_enabled(bool value
)
172 struct jtag_tap
*jtag_all_taps(void)
174 return __jtag_all_taps
;
177 unsigned jtag_tap_count(void)
179 return jtag_num_taps
;
182 unsigned jtag_tap_count_enabled(void)
184 struct jtag_tap
*t
= jtag_all_taps();
195 /// Append a new TAP to the chain of all taps.
196 void jtag_tap_add(struct jtag_tap
*t
)
198 t
->abs_chain_position
= jtag_num_taps
++;
200 struct jtag_tap
**tap
= &__jtag_all_taps
;
202 tap
= &(*tap
)->next_tap
;
206 /* returns a pointer to the n-th device in the scan chain */
207 static inline struct jtag_tap
*jtag_tap_by_position(unsigned n
)
209 struct jtag_tap
*t
= jtag_all_taps();
217 struct jtag_tap
*jtag_tap_by_string(const char *s
)
219 /* try by name first */
220 struct jtag_tap
*t
= jtag_all_taps();
224 if (0 == strcmp(t
->dotted_name
, s
))
229 /* no tap found by name, so try to parse the name as a number */
231 if (parse_uint(s
, &n
) != ERROR_OK
)
234 /* FIXME remove this numeric fallback code late June 2010, along
235 * with all info in the User's Guide that TAPs have numeric IDs.
236 * Also update "scan_chain" output to not display the numbers.
238 t
= jtag_tap_by_position(n
);
240 LOG_WARNING("Specify TAP '%s' by name, not number %u",
246 struct jtag_tap
* jtag_tap_next_enabled(struct jtag_tap
* p
)
248 p
= p
? p
->next_tap
: jtag_all_taps();
258 const char *jtag_tap_name(const struct jtag_tap
*tap
)
260 return (tap
== NULL
) ? "(unknown)" : tap
->dotted_name
;
264 int jtag_register_event_callback(jtag_event_handler_t callback
, void *priv
)
266 struct jtag_event_callback
**callbacks_p
= &jtag_event_callbacks
;
268 if (callback
== NULL
)
270 return ERROR_INVALID_ARGUMENTS
;
275 while ((*callbacks_p
)->next
)
276 callbacks_p
= &((*callbacks_p
)->next
);
277 callbacks_p
= &((*callbacks_p
)->next
);
280 (*callbacks_p
) = malloc(sizeof(struct jtag_event_callback
));
281 (*callbacks_p
)->callback
= callback
;
282 (*callbacks_p
)->priv
= priv
;
283 (*callbacks_p
)->next
= NULL
;
288 int jtag_unregister_event_callback(jtag_event_handler_t callback
, void *priv
)
290 struct jtag_event_callback
**callbacks_p
;
291 struct jtag_event_callback
**next
;
293 if (callback
== NULL
)
295 return ERROR_INVALID_ARGUMENTS
;
298 for (callbacks_p
= &jtag_event_callbacks
;
299 *callbacks_p
!= NULL
;
302 next
= &((*callbacks_p
)->next
);
304 if ((*callbacks_p
)->priv
!= priv
)
307 if ((*callbacks_p
)->callback
== callback
)
310 *callbacks_p
= *next
;
317 int jtag_call_event_callbacks(enum jtag_event event
)
319 struct jtag_event_callback
*callback
= jtag_event_callbacks
;
321 LOG_DEBUG("jtag event: %s", jtag_event_strings
[event
]);
325 struct jtag_event_callback
*next
;
327 /* callback may remove itself */
328 next
= callback
->next
;
329 callback
->callback(event
, callback
->priv
);
336 static void jtag_checks(void)
338 assert(jtag_trst
== 0);
341 static void jtag_prelude(tap_state_t state
)
345 assert(state
!= TAP_INVALID
);
347 cmd_queue_cur_state
= state
;
350 void jtag_alloc_in_value32(struct scan_field
*field
)
352 interface_jtag_alloc_in_value32(field
);
355 void jtag_add_ir_scan_noverify(int in_count
, const struct scan_field
*in_fields
,
360 int retval
= interface_jtag_add_ir_scan(in_count
, in_fields
, state
);
361 jtag_set_error(retval
);
365 void jtag_add_ir_scan(int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
367 assert(state
!= TAP_RESET
);
369 if (jtag_verify
&& jtag_verify_capture_ir
)
371 /* 8 x 32 bit id's is enough for all invocations */
373 for (int j
= 0; j
< in_num_fields
; j
++)
375 /* if we are to run a verification of the ir scan, we need to get the input back.
376 * We may have to allocate space if the caller didn't ask for the input back.
378 in_fields
[j
].check_value
= in_fields
[j
].tap
->expected
;
379 in_fields
[j
].check_mask
= in_fields
[j
].tap
->expected_mask
;
381 jtag_add_scan_check(jtag_add_ir_scan_noverify
, in_num_fields
, in_fields
, state
);
384 jtag_add_ir_scan_noverify(in_num_fields
, in_fields
, state
);
388 void jtag_add_plain_ir_scan(int in_num_fields
, const struct scan_field
*in_fields
,
391 assert(state
!= TAP_RESET
);
395 int retval
= interface_jtag_add_plain_ir_scan(
396 in_num_fields
, in_fields
, state
);
397 jtag_set_error(retval
);
400 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
401 uint8_t *in_check_mask
, int num_bits
);
403 static int jtag_check_value_mask_callback(jtag_callback_data_t data0
, jtag_callback_data_t data1
, jtag_callback_data_t data2
, jtag_callback_data_t data3
)
405 return jtag_check_value_inner((uint8_t *)data0
, (uint8_t *)data1
, (uint8_t *)data2
, (int)data3
);
408 static void jtag_add_scan_check(void (*jtag_add_scan
)(int in_num_fields
, const struct scan_field
*in_fields
, tap_state_t state
),
409 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
411 for (int i
= 0; i
< in_num_fields
; i
++)
413 struct scan_field
*field
= &in_fields
[i
];
414 field
->allocated
= 0;
416 if (field
->check_value
|| field
->in_value
)
418 interface_jtag_add_scan_check_alloc(field
);
422 jtag_add_scan(in_num_fields
, in_fields
, state
);
424 for (int i
= 0; i
< in_num_fields
; i
++)
426 if ((in_fields
[i
].check_value
!= NULL
) && (in_fields
[i
].in_value
!= NULL
))
428 /* this is synchronous for a minidriver */
429 jtag_add_callback4(jtag_check_value_mask_callback
, (jtag_callback_data_t
)in_fields
[i
].in_value
,
430 (jtag_callback_data_t
)in_fields
[i
].check_value
,
431 (jtag_callback_data_t
)in_fields
[i
].check_mask
,
432 (jtag_callback_data_t
)in_fields
[i
].num_bits
);
434 if (in_fields
[i
].allocated
)
436 free(in_fields
[i
].in_value
);
438 if (in_fields
[i
].modified
)
440 in_fields
[i
].in_value
= NULL
;
445 void jtag_add_dr_scan_check(int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
449 jtag_add_scan_check(jtag_add_dr_scan
, in_num_fields
, in_fields
, state
);
452 jtag_add_dr_scan(in_num_fields
, in_fields
, state
);
457 void jtag_add_dr_scan(int in_num_fields
, const struct scan_field
*in_fields
,
460 assert(state
!= TAP_RESET
);
465 retval
= interface_jtag_add_dr_scan(in_num_fields
, in_fields
, state
);
466 jtag_set_error(retval
);
469 void jtag_add_plain_dr_scan(int in_num_fields
, const struct scan_field
*in_fields
,
472 assert(state
!= TAP_RESET
);
477 retval
= interface_jtag_add_plain_dr_scan(in_num_fields
, in_fields
, state
);
478 jtag_set_error(retval
);
481 void jtag_add_tlr(void)
483 jtag_prelude(TAP_RESET
);
484 jtag_set_error(interface_jtag_add_tlr());
486 /* NOTE: order here matches TRST path in jtag_add_reset() */
487 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
488 jtag_notify_event(JTAG_TRST_ASSERTED
);
492 * If supported by the underlying adapter, this clocks a raw bit sequence
493 * onto TMS for switching betwen JTAG and SWD modes.
495 * DO NOT use this to bypass the integrity checks and logging provided
496 * by the jtag_add_pathmove() and jtag_add_statemove() calls.
498 * @param nbits How many bits to clock out.
499 * @param seq The bit sequence. The LSB is bit 0 of seq[0].
500 * @param state The JTAG tap state to record on completion. Use
501 * TAP_INVALID to represent being in in SWD mode.
503 * @todo Update naming conventions to stop assuming everything is JTAG.
505 int jtag_add_tms_seq(unsigned nbits
, const uint8_t *seq
, enum tap_state state
)
509 if (!(jtag
->supported
& DEBUG_CAP_TMS_SEQ
))
510 return ERROR_JTAG_NOT_IMPLEMENTED
;
513 cmd_queue_cur_state
= state
;
515 retval
= interface_add_tms_seq(nbits
, seq
);
516 jtag_set_error(retval
);
520 void jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
522 tap_state_t cur_state
= cmd_queue_cur_state
;
524 /* the last state has to be a stable state */
525 if (!tap_is_state_stable(path
[num_states
- 1]))
527 LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
528 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
532 for (int i
= 0; i
< num_states
; i
++)
534 if (path
[i
] == TAP_RESET
)
536 LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
537 jtag_set_error(ERROR_JTAG_STATE_INVALID
);
541 if (tap_state_transition(cur_state
, true) != path
[i
]
542 && tap_state_transition(cur_state
, false) != path
[i
])
544 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
545 tap_state_name(cur_state
), tap_state_name(path
[i
]));
546 jtag_set_error(ERROR_JTAG_TRANSITION_INVALID
);
554 jtag_set_error(interface_jtag_add_pathmove(num_states
, path
));
555 cmd_queue_cur_state
= path
[num_states
- 1];
558 int jtag_add_statemove(tap_state_t goal_state
)
560 tap_state_t cur_state
= cmd_queue_cur_state
;
562 if (goal_state
!= cur_state
)
564 LOG_DEBUG("cur_state=%s goal_state=%s",
565 tap_state_name(cur_state
),
566 tap_state_name(goal_state
));
569 /* If goal is RESET, be paranoid and force that that transition
570 * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
572 if (goal_state
== TAP_RESET
)
574 else if (goal_state
== cur_state
)
575 /* nothing to do */ ;
577 else if (tap_is_state_stable(cur_state
) && tap_is_state_stable(goal_state
))
579 unsigned tms_bits
= tap_get_tms_path(cur_state
, goal_state
);
580 unsigned tms_count
= tap_get_tms_path_len(cur_state
, goal_state
);
581 tap_state_t moves
[8];
582 assert(tms_count
< ARRAY_SIZE(moves
));
584 for (unsigned i
= 0; i
< tms_count
; i
++, tms_bits
>>= 1)
586 bool bit
= tms_bits
& 1;
588 cur_state
= tap_state_transition(cur_state
, bit
);
589 moves
[i
] = cur_state
;
592 jtag_add_pathmove(tms_count
, moves
);
594 else if (tap_state_transition(cur_state
, true) == goal_state
595 || tap_state_transition(cur_state
, false) == goal_state
)
597 jtag_add_pathmove(1, &goal_state
);
606 void jtag_add_runtest(int num_cycles
, tap_state_t state
)
609 jtag_set_error(interface_jtag_add_runtest(num_cycles
, state
));
613 void jtag_add_clocks(int num_cycles
)
615 if (!tap_is_state_stable(cmd_queue_cur_state
))
617 LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
618 tap_state_name(cmd_queue_cur_state
));
619 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
626 jtag_set_error(interface_jtag_add_clocks(num_cycles
));
630 void jtag_add_reset(int req_tlr_or_trst
, int req_srst
)
632 int trst_with_tlr
= 0;
636 /* Without SRST, we must use target-specific JTAG operations
637 * on each target; callers should not be requesting SRST when
638 * that signal doesn't exist.
640 * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
641 * can kick in even if the JTAG adapter can't drive TRST.
644 if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
645 LOG_ERROR("BUG: can't assert SRST");
646 jtag_set_error(ERROR_FAIL
);
649 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0
650 && !req_tlr_or_trst
) {
651 LOG_ERROR("BUG: can't assert only SRST");
652 jtag_set_error(ERROR_FAIL
);
658 /* JTAG reset (entry to TAP_RESET state) can always be achieved
659 * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
660 * state first. TRST accelerates it, and bypasses those states.
662 * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
663 * can kick in even if the JTAG adapter can't drive SRST.
665 if (req_tlr_or_trst
) {
666 if (!(jtag_reset_config
& RESET_HAS_TRST
))
668 else if ((jtag_reset_config
& RESET_TRST_PULLS_SRST
) != 0
675 /* Maybe change TRST and/or SRST signal state */
676 if (jtag_srst
!= new_srst
|| jtag_trst
!= new_trst
) {
679 retval
= interface_jtag_add_reset(new_trst
, new_srst
);
680 if (retval
!= ERROR_OK
)
681 jtag_set_error(retval
);
683 retval
= jtag_execute_queue();
685 if (retval
!= ERROR_OK
) {
686 LOG_ERROR("TRST/SRST error %d", retval
);
691 /* SRST resets everything hooked up to that signal */
692 if (jtag_srst
!= new_srst
) {
693 jtag_srst
= new_srst
;
696 LOG_DEBUG("SRST line asserted");
697 if (jtag_nsrst_assert_width
)
698 jtag_add_sleep(jtag_nsrst_assert_width
* 1000);
701 LOG_DEBUG("SRST line released");
702 if (jtag_nsrst_delay
)
703 jtag_add_sleep(jtag_nsrst_delay
* 1000);
707 /* Maybe enter the JTAG TAP_RESET state ...
708 * - using only TMS, TCK, and the JTAG state machine
709 * - or else more directly, using TRST
711 * TAP_RESET should be invisible to non-debug parts of the system.
714 LOG_DEBUG("JTAG reset with TLR instead of TRST");
715 jtag_set_end_state(TAP_RESET
);
718 } else if (jtag_trst
!= new_trst
) {
719 jtag_trst
= new_trst
;
721 LOG_DEBUG("TRST line asserted");
722 tap_set_state(TAP_RESET
);
723 if (jtag_ntrst_assert_width
)
724 jtag_add_sleep(jtag_ntrst_assert_width
* 1000);
726 LOG_DEBUG("TRST line released");
727 if (jtag_ntrst_delay
)
728 jtag_add_sleep(jtag_ntrst_delay
* 1000);
730 /* We just asserted nTRST, so we're now in TAP_RESET.
731 * Inform possible listeners about this, now that
732 * JTAG instructions and data can be shifted. This
733 * sequence must match jtag_add_tlr().
735 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
736 jtag_notify_event(JTAG_TRST_ASSERTED
);
741 tap_state_t
jtag_set_end_state(tap_state_t state
)
743 if ((state
== TAP_DRSHIFT
)||(state
== TAP_IRSHIFT
))
745 LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
748 if (state
!= TAP_INVALID
)
749 cmd_queue_end_state
= state
;
750 return cmd_queue_end_state
;
753 tap_state_t
jtag_get_end_state(void)
755 return cmd_queue_end_state
;
758 void jtag_add_sleep(uint32_t us
)
760 /// @todo Here, keep_alive() appears to be a layering violation!!!
762 jtag_set_error(interface_jtag_add_sleep(us
));
765 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
766 uint8_t *in_check_mask
, int num_bits
)
768 int retval
= ERROR_OK
;
772 compare_failed
= buf_cmp_mask(captured
, in_check_value
, in_check_mask
, num_bits
);
774 compare_failed
= buf_cmp(captured
, in_check_value
, num_bits
);
776 if (compare_failed
) {
777 char *captured_str
, *in_check_value_str
;
778 int bits
= (num_bits
> DEBUG_JTAG_IOZ
)
782 /* NOTE: we've lost diagnostic context here -- 'which tap' */
784 captured_str
= buf_to_str(captured
, bits
, 16);
785 in_check_value_str
= buf_to_str(in_check_value
, bits
, 16);
787 LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
789 LOG_WARNING(" check_value: 0x%s", in_check_value_str
);
792 free(in_check_value_str
);
795 char *in_check_mask_str
;
797 in_check_mask_str
= buf_to_str(in_check_mask
, bits
, 16);
798 LOG_WARNING(" check_mask: 0x%s", in_check_mask_str
);
799 free(in_check_mask_str
);
802 retval
= ERROR_JTAG_QUEUE_FAILED
;
807 void jtag_check_value_mask(struct scan_field
*field
, uint8_t *value
, uint8_t *mask
)
809 assert(field
->in_value
!= NULL
);
813 /* no checking to do */
817 jtag_execute_queue_noclear();
819 int retval
= jtag_check_value_inner(field
->in_value
, value
, mask
, field
->num_bits
);
820 jtag_set_error(retval
);
825 int default_interface_jtag_execute_queue(void)
829 LOG_ERROR("No JTAG interface configured yet. "
830 "Issue 'init' command in startup scripts "
831 "before communicating with targets.");
835 return jtag
->execute_queue();
838 void jtag_execute_queue_noclear(void)
840 jtag_flush_queue_count
++;
841 jtag_set_error(interface_jtag_execute_queue());
844 int jtag_get_flush_queue_count(void)
846 return jtag_flush_queue_count
;
849 int jtag_execute_queue(void)
851 jtag_execute_queue_noclear();
852 return jtag_error_clear();
855 static int jtag_reset_callback(enum jtag_event event
, void *priv
)
857 struct jtag_tap
*tap
= priv
;
859 if (event
== JTAG_TRST_ASSERTED
)
861 tap
->enabled
= !tap
->disabled_after_reset
;
863 /* current instruction is either BYPASS or IDCODE */
864 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
871 void jtag_sleep(uint32_t us
)
873 alive_sleep(us
/1000);
876 /* Maximum number of enabled JTAG devices we expect in the scan chain,
877 * plus one (to detect garbage at the end). Devices that don't support
878 * IDCODE take up fewer bits, possibly allowing a few more devices.
880 #define JTAG_MAX_CHAIN_SIZE 20
882 #define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
883 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
884 #define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
886 /* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
887 * know that no valid TAP will have it as an IDCODE value.
889 #define END_OF_CHAIN_FLAG 0x000000ff
891 /* a larger IR length than we ever expect to autoprobe */
892 #define JTAG_IRLEN_MAX 60
894 static int jtag_examine_chain_execute(uint8_t *idcode_buffer
, unsigned num_idcode
)
896 struct scan_field field
= {
898 .num_bits
= num_idcode
* 32,
899 .out_value
= idcode_buffer
,
900 .in_value
= idcode_buffer
,
903 // initialize to the end of chain ID value
904 for (unsigned i
= 0; i
< JTAG_MAX_CHAIN_SIZE
; i
++)
905 buf_set_u32(idcode_buffer
, i
* 32, 32, END_OF_CHAIN_FLAG
);
907 jtag_add_plain_dr_scan(1, &field
, TAP_DRPAUSE
);
909 return jtag_execute_queue();
912 static bool jtag_examine_chain_check(uint8_t *idcodes
, unsigned count
)
914 uint8_t zero_check
= 0x0;
915 uint8_t one_check
= 0xff;
917 for (unsigned i
= 0; i
< count
* 4; i
++)
919 zero_check
|= idcodes
[i
];
920 one_check
&= idcodes
[i
];
923 /* if there wasn't a single non-zero bit or if all bits were one,
924 * the scan is not valid. We wrote a mix of both values; either
926 * - There's a hardware issue (almost certainly):
927 * + all-zeroes can mean a target stuck in JTAG reset
928 * + all-ones tends to mean no target
929 * - The scan chain is WAY longer than we can handle, *AND* either
930 * + there are several hundreds of TAPs in bypass, or
931 * + at least a few dozen TAPs all have an all-ones IDCODE
933 if (zero_check
== 0x00 || one_check
== 0xff)
935 LOG_ERROR("JTAG scan chain interrogation failed: all %s",
936 (zero_check
== 0x00) ? "zeroes" : "ones");
937 LOG_ERROR("Check JTAG interface, timings, target power, etc.");
943 static void jtag_examine_chain_display(enum log_levels level
, const char *msg
,
944 const char *name
, uint32_t idcode
)
946 log_printf_lf(level
, __FILE__
, __LINE__
, __FUNCTION__
,
947 "JTAG tap: %s %16.16s: 0x%08x "
948 "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
950 (unsigned int)idcode
,
951 (unsigned int)EXTRACT_MFG(idcode
),
952 (unsigned int)EXTRACT_PART(idcode
),
953 (unsigned int)EXTRACT_VER(idcode
));
956 static bool jtag_idcode_is_final(uint32_t idcode
)
959 * Some devices, such as AVR8, will output all 1's instead
960 * of TDI input value at end of chain. Allow those values
961 * instead of failing.
963 return idcode
== END_OF_CHAIN_FLAG
|| idcode
== 0xFFFFFFFF;
967 * This helper checks that remaining bits in the examined chain data are
968 * all as expected, but a single JTAG device requires only 64 bits to be
969 * read back correctly. This can help identify and diagnose problems
970 * with the JTAG chain earlier, gives more helpful/explicit error messages.
971 * Returns TRUE iff garbage was found.
973 static bool jtag_examine_chain_end(uint8_t *idcodes
, unsigned count
, unsigned max
)
975 bool triggered
= false;
976 for (; count
< max
- 31; count
+= 32)
978 uint32_t idcode
= buf_get_u32(idcodes
, count
, 32);
980 /* do not trigger the warning if the data looks good */
981 if (jtag_idcode_is_final(idcode
))
983 LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
984 count
, (unsigned int)idcode
);
990 static bool jtag_examine_chain_match_tap(const struct jtag_tap
*tap
)
992 uint32_t idcode
= tap
->idcode
;
994 /* ignore expected BYPASS codes; warn otherwise */
995 if (0 == tap
->expected_ids_cnt
&& !idcode
)
998 /* optionally ignore the JTAG version field */
999 uint32_t mask
= tap
->ignore_version
? ~(0xff << 24) : ~0;
1003 /* Loop over the expected identification codes and test for a match */
1004 unsigned ii
, limit
= tap
->expected_ids_cnt
;
1006 for (ii
= 0; ii
< limit
; ii
++)
1008 uint32_t expected
= tap
->expected_ids
[ii
] & mask
;
1010 if (idcode
== expected
)
1013 /* treat "-expected-id 0" as a "don't-warn" wildcard */
1014 if (0 == tap
->expected_ids
[ii
])
1018 /* If none of the expected ids matched, warn */
1019 jtag_examine_chain_display(LOG_LVL_WARNING
, "UNEXPECTED",
1020 tap
->dotted_name
, tap
->idcode
);
1021 for (ii
= 0; ii
< limit
; ii
++)
1025 snprintf(msg
, sizeof(msg
), "expected %u of %u", ii
+ 1, limit
);
1026 jtag_examine_chain_display(LOG_LVL_ERROR
, msg
,
1027 tap
->dotted_name
, tap
->expected_ids
[ii
]);
1032 /* Try to examine chain layout according to IEEE 1149.1 §12
1033 * This is called a "blind interrogation" of the scan chain.
1035 static int jtag_examine_chain(void)
1037 uint8_t idcode_buffer
[JTAG_MAX_CHAIN_SIZE
* 4];
1041 bool autoprobe
= false;
1043 /* DR scan to collect BYPASS or IDCODE register contents.
1044 * Then make sure the scan data has both ones and zeroes.
1046 LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
1047 retval
= jtag_examine_chain_execute(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
);
1048 if (retval
!= ERROR_OK
)
1050 if (!jtag_examine_chain_check(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
))
1051 return ERROR_JTAG_INIT_FAILED
;
1053 /* point at the 1st tap */
1054 struct jtag_tap
*tap
= jtag_tap_next_enabled(NULL
);
1060 tap
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31;
1061 tap
= jtag_tap_next_enabled(tap
))
1063 uint32_t idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1065 if ((idcode
& 1) == 0)
1067 /* Zero for LSB indicates a device in bypass */
1068 LOG_INFO("TAP %s does not have IDCODE",
1071 tap
->hasidcode
= false;
1077 /* Friendly devices support IDCODE */
1078 tap
->hasidcode
= true;
1079 jtag_examine_chain_display(LOG_LVL_INFO
,
1081 tap
->dotted_name
, idcode
);
1085 tap
->idcode
= idcode
;
1087 /* ensure the TAP ID matches what was expected */
1088 if (!jtag_examine_chain_match_tap(tap
))
1089 retval
= ERROR_JTAG_INIT_SOFT_FAIL
;
1092 /* Fail if too many TAPs were enabled for us to verify them all. */
1094 LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
1096 return ERROR_JTAG_INIT_FAILED
;
1099 /* if autoprobing, the tap list is still empty ... populate it! */
1100 while (autoprobe
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31) {
1104 /* Is there another TAP? */
1105 idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1106 if (jtag_idcode_is_final(idcode
))
1109 /* Default everything in this TAP except IR length.
1111 * REVISIT create a jtag_alloc(chip, tap) routine, and
1112 * share it with jim_newtap_cmd().
1114 tap
= calloc(1, sizeof *tap
);
1118 sprintf(buf
, "auto%d", tapcount
++);
1119 tap
->chip
= strdup(buf
);
1120 tap
->tapname
= strdup("tap");
1122 sprintf(buf
, "%s.%s", tap
->chip
, tap
->tapname
);
1123 tap
->dotted_name
= strdup(buf
);
1125 /* tap->ir_length == 0 ... signifying irlen autoprobe */
1126 tap
->ir_capture_mask
= 0x03;
1127 tap
->ir_capture_value
= 0x01;
1129 tap
->enabled
= true;
1131 if ((idcode
& 1) == 0) {
1133 tap
->hasidcode
= false;
1136 tap
->hasidcode
= true;
1137 tap
->idcode
= idcode
;
1139 tap
->expected_ids_cnt
= 1;
1140 tap
->expected_ids
= malloc(sizeof(uint32_t));
1141 tap
->expected_ids
[0] = idcode
;
1144 LOG_WARNING("AUTO %s - use \"jtag newtap "
1145 "%s %s -expected-id 0x%8.8" PRIx32
" ...\"",
1146 tap
->dotted_name
, tap
->chip
, tap
->tapname
,
1152 /* After those IDCODE or BYPASS register values should be
1153 * only the data we fed into the scan chain.
1155 if (jtag_examine_chain_end(idcode_buffer
, bit_count
,
1156 8 * sizeof(idcode_buffer
))) {
1157 LOG_ERROR("double-check your JTAG setup (interface, "
1158 "speed, missing TAPs, ...)");
1159 return ERROR_JTAG_INIT_FAILED
;
1162 /* Return success or, for backwards compatibility if only
1163 * some IDCODE values mismatched, a soft/continuable fault.
1169 * Validate the date loaded by entry to the Capture-IR state, to help
1170 * find errors related to scan chain configuration (wrong IR lengths)
1173 * Entry state can be anything. On non-error exit, all TAPs are in
1174 * bypass mode. On error exits, the scan chain is reset.
1176 static int jtag_validate_ircapture(void)
1178 struct jtag_tap
*tap
;
1179 int total_ir_length
= 0;
1180 uint8_t *ir_test
= NULL
;
1181 struct scan_field field
;
1186 /* when autoprobing, accomodate huge IR lengths */
1187 for (tap
= NULL
, total_ir_length
= 0;
1188 (tap
= jtag_tap_next_enabled(tap
)) != NULL
;
1189 total_ir_length
+= tap
->ir_length
) {
1190 if (tap
->ir_length
== 0)
1191 total_ir_length
+= JTAG_IRLEN_MAX
;
1194 /* increase length to add 2 bit sentinel after scan */
1195 total_ir_length
+= 2;
1197 ir_test
= malloc(DIV_ROUND_UP(total_ir_length
, 8));
1198 if (ir_test
== NULL
)
1201 /* after this scan, all TAPs will capture BYPASS instructions */
1202 buf_set_ones(ir_test
, total_ir_length
);
1205 field
.num_bits
= total_ir_length
;
1206 field
.out_value
= ir_test
;
1207 field
.in_value
= ir_test
;
1209 jtag_add_plain_ir_scan(1, &field
, TAP_IDLE
);
1211 LOG_DEBUG("IR capture validation scan");
1212 retval
= jtag_execute_queue();
1213 if (retval
!= ERROR_OK
)
1220 tap
= jtag_tap_next_enabled(tap
);
1225 /* If we're autoprobing, guess IR lengths. They must be at
1226 * least two bits. Guessing will fail if (a) any TAP does
1227 * not conform to the JTAG spec; or (b) when the upper bits
1228 * captured from some conforming TAP are nonzero. Or if
1229 * (c) an IR length is longer than 32 bits -- which is only
1230 * an implementation limit, which could someday be raised.
1232 * REVISIT optimization: if there's a *single* TAP we can
1233 * lift restrictions (a) and (b) by scanning a recognizable
1234 * pattern before the all-ones BYPASS. Check for where the
1235 * pattern starts in the result, instead of an 0...01 value.
1237 * REVISIT alternative approach: escape to some tcl code
1238 * which could provide more knowledge, based on IDCODE; and
1239 * only guess when that has no success.
1241 if (tap
->ir_length
== 0) {
1243 while ((val
= buf_get_u32(ir_test
, chain_pos
,
1244 tap
->ir_length
+ 1)) == 1
1245 && tap
->ir_length
<= 32) {
1248 LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
1249 jtag_tap_name(tap
), tap
->ir_length
);
1252 /* Validate the two LSBs, which must be 01 per JTAG spec.
1254 * Or ... more bits could be provided by TAP declaration.
1255 * Plus, some taps (notably in i.MX series chips) violate
1256 * this part of the JTAG spec, so their capture mask/value
1257 * attributes might disable this test.
1259 val
= buf_get_u32(ir_test
, chain_pos
, tap
->ir_length
);
1260 if ((val
& tap
->ir_capture_mask
) != tap
->ir_capture_value
) {
1261 LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x%0*x",
1263 (tap
->ir_length
+ 7) / tap
->ir_length
,
1265 (tap
->ir_length
+ 7) / tap
->ir_length
,
1266 (unsigned) tap
->ir_capture_value
);
1268 retval
= ERROR_JTAG_INIT_FAILED
;
1271 LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap
),
1272 (tap
->ir_length
+ 7) / tap
->ir_length
, val
);
1273 chain_pos
+= tap
->ir_length
;
1276 /* verify the '11' sentinel we wrote is returned at the end */
1277 val
= buf_get_u32(ir_test
, chain_pos
, 2);
1280 char *cbuf
= buf_to_str(ir_test
, total_ir_length
, 16);
1282 LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
1285 retval
= ERROR_JTAG_INIT_FAILED
;
1290 if (retval
!= ERROR_OK
) {
1292 jtag_execute_queue();
1298 void jtag_tap_init(struct jtag_tap
*tap
)
1300 unsigned ir_len_bits
;
1301 unsigned ir_len_bytes
;
1303 /* if we're autoprobing, cope with potentially huge ir_length */
1304 ir_len_bits
= tap
->ir_length
? : JTAG_IRLEN_MAX
;
1305 ir_len_bytes
= DIV_ROUND_UP(ir_len_bits
, 8);
1307 tap
->expected
= calloc(1, ir_len_bytes
);
1308 tap
->expected_mask
= calloc(1, ir_len_bytes
);
1309 tap
->cur_instr
= malloc(ir_len_bytes
);
1311 /// @todo cope better with ir_length bigger than 32 bits
1312 if (ir_len_bits
> 32)
1315 buf_set_u32(tap
->expected
, 0, ir_len_bits
, tap
->ir_capture_value
);
1316 buf_set_u32(tap
->expected_mask
, 0, ir_len_bits
, tap
->ir_capture_mask
);
1318 // TAP will be in bypass mode after jtag_validate_ircapture()
1320 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
1322 // register the reset callback for the TAP
1323 jtag_register_event_callback(&jtag_reset_callback
, tap
);
1325 LOG_DEBUG("Created Tap: %s @ abs position %d, "
1326 "irlen %d, capture: 0x%x mask: 0x%x", tap
->dotted_name
,
1327 tap
->abs_chain_position
, tap
->ir_length
,
1328 (unsigned) tap
->ir_capture_value
,
1329 (unsigned) tap
->ir_capture_mask
);
1333 void jtag_tap_free(struct jtag_tap
*tap
)
1335 jtag_unregister_event_callback(&jtag_reset_callback
, tap
);
1337 /// @todo is anything missing? no memory leaks please
1338 free((void *)tap
->expected
);
1339 free((void *)tap
->expected_ids
);
1340 free((void *)tap
->chip
);
1341 free((void *)tap
->tapname
);
1342 free((void *)tap
->dotted_name
);
1346 int jtag_interface_init(struct command_context
*cmd_ctx
)
1351 if (!jtag_interface
)
1353 /* nothing was previously specified by "interface" command */
1354 LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
1355 return ERROR_JTAG_INVALID_INTERFACE
;
1358 jtag
= jtag_interface
;
1359 if (jtag_interface
->init() != ERROR_OK
)
1362 return ERROR_JTAG_INIT_FAILED
;
1365 int requested_khz
= jtag_get_speed_khz();
1366 int actual_khz
= requested_khz
;
1367 int retval
= jtag_get_speed_readable(&actual_khz
);
1368 if (ERROR_OK
!= retval
)
1369 LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
1370 else if (actual_khz
)
1372 if ((CLOCK_MODE_RCLK
== clock_mode
)
1373 || ((CLOCK_MODE_KHZ
== clock_mode
) && !requested_khz
))
1375 LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
1379 LOG_INFO("clock speed %d kHz", actual_khz
);
1382 LOG_INFO("RCLK (adaptive clock speed)");
1387 int jtag_init_inner(struct command_context
*cmd_ctx
)
1389 struct jtag_tap
*tap
;
1391 bool issue_setup
= true;
1393 LOG_DEBUG("Init JTAG chain");
1395 tap
= jtag_tap_next_enabled(NULL
);
1397 /* Once JTAG itself is properly set up, and the scan chain
1398 * isn't absurdly large, IDCODE autoprobe should work fine.
1400 * But ... IRLEN autoprobe can fail even on systems which
1401 * are fully conformant to JTAG. Also, JTAG setup can be
1402 * quite finicky on some systems.
1404 * REVISIT: if TAP autoprobe works OK, then in many cases
1405 * we could escape to tcl code and set up targets based on
1406 * the TAP's IDCODE values.
1408 LOG_WARNING("There are no enabled taps. "
1409 "AUTO PROBING MIGHT NOT WORK!!");
1411 /* REVISIT default clock will often be too fast ... */
1415 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1418 /* Examine DR values first. This discovers problems which will
1419 * prevent communication ... hardware issues like TDO stuck, or
1420 * configuring the wrong number of (enabled) TAPs.
1422 retval
= jtag_examine_chain();
1425 /* complete success */
1427 case ERROR_JTAG_INIT_SOFT_FAIL
:
1428 /* For backward compatibility reasons, try coping with
1429 * configuration errors involving only ID mismatches.
1430 * We might be able to talk to the devices.
1432 LOG_ERROR("Trying to use configured scan chain anyway...");
1433 issue_setup
= false;
1436 /* some hard error; already issued diagnostics */
1440 /* Now look at IR values. Problems here will prevent real
1441 * communication. They mostly mean that the IR length is
1442 * wrong ... or that the IR capture value is wrong. (The
1443 * latter is uncommon, but easily worked around: provide
1444 * ircapture/irmask values during TAP setup.)
1446 retval
= jtag_validate_ircapture();
1447 if (retval
!= ERROR_OK
)
1451 jtag_notify_event(JTAG_TAP_EVENT_SETUP
);
1453 LOG_WARNING("Bypassing JTAG setup events due to errors");
1459 int jtag_interface_quit(void)
1461 if (!jtag
|| !jtag
->quit
)
1464 // close the JTAG interface
1465 int result
= jtag
->quit();
1466 if (ERROR_OK
!= result
)
1467 LOG_ERROR("failed: %d", result
);
1473 int jtag_init_reset(struct command_context
*cmd_ctx
)
1477 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1480 LOG_DEBUG("Initializing with hard TRST+SRST reset");
1483 * This procedure is used by default when OpenOCD triggers a reset.
1484 * It's now done through an overridable Tcl "init_reset" wrapper.
1486 * This started out as a more powerful "get JTAG working" reset than
1487 * jtag_init_inner(), applying TRST because some chips won't activate
1488 * JTAG without a TRST cycle (presumed to be async, though some of
1489 * those chips synchronize JTAG activation using TCK).
1491 * But some chips only activate JTAG as part of an SRST cycle; SRST
1492 * got mixed in. So it became a hard reset routine, which got used
1493 * in more places, and which coped with JTAG reset being forced as
1494 * part of SRST (srst_pulls_trst).
1496 * And even more corner cases started to surface: TRST and/or SRST
1497 * assertion timings matter; some chips need other JTAG operations;
1498 * TRST/SRST sequences can need to be different from these, etc.
1500 * Systems should override that wrapper to support system-specific
1501 * requirements that this not-fully-generic code doesn't handle.
1503 * REVISIT once Tcl code can read the reset_config modes, this won't
1504 * need to be a C routine at all...
1506 jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
1507 if (jtag_reset_config
& RESET_HAS_SRST
)
1509 jtag_add_reset(1, 1);
1510 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) == 0)
1511 jtag_add_reset(0, 1);
1513 jtag_add_reset(0, 0);
1514 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1517 /* Check that we can communication on the JTAG chain + eventually we want to
1518 * be able to perform enumeration only after OpenOCD has started
1519 * telnet and GDB server
1521 * That would allow users to more easily perform any magic they need to before
1524 return jtag_init_inner(cmd_ctx
);
1527 int jtag_init(struct command_context
*cmd_ctx
)
1531 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1534 /* guard against oddball hardware: force resets to be inactive */
1535 jtag_add_reset(0, 0);
1536 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1539 if (Jim_Eval_Named(cmd_ctx
->interp
, "jtag_init", __FILE__
, __LINE__
) != JIM_OK
)
1545 unsigned jtag_get_speed_khz(void)
1550 static int jtag_khz_to_speed(unsigned khz
, int* speed
)
1552 LOG_DEBUG("convert khz to interface specific speed value");
1556 LOG_DEBUG("have interface set up");
1558 int retval
= jtag
->khz(jtag_get_speed_khz(), &speed_div1
);
1559 if (ERROR_OK
!= retval
)
1563 *speed
= speed_div1
;
1568 static int jtag_rclk_to_speed(unsigned fallback_speed_khz
, int* speed
)
1570 int retval
= jtag_khz_to_speed(0, speed
);
1571 if ((ERROR_OK
!= retval
) && fallback_speed_khz
)
1573 LOG_DEBUG("trying fallback speed...");
1574 retval
= jtag_khz_to_speed(fallback_speed_khz
, speed
);
1579 static int jtag_set_speed(int speed
)
1582 /* this command can be called during CONFIG,
1583 * in which case jtag isn't initialized */
1584 return jtag
? jtag
->speed(speed
) : ERROR_OK
;
1587 int jtag_config_khz(unsigned khz
)
1589 LOG_DEBUG("handle jtag khz");
1590 clock_mode
= CLOCK_MODE_KHZ
;
1592 int retval
= jtag_khz_to_speed(khz
, &speed
);
1593 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1596 int jtag_config_rclk(unsigned fallback_speed_khz
)
1598 LOG_DEBUG("handle jtag rclk");
1599 clock_mode
= CLOCK_MODE_RCLK
;
1600 rclk_fallback_speed_khz
= fallback_speed_khz
;
1602 int retval
= jtag_rclk_to_speed(fallback_speed_khz
, &speed
);
1603 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1606 int jtag_get_speed(void)
1611 case CLOCK_MODE_SPEED
:
1614 case CLOCK_MODE_KHZ
:
1615 jtag_khz_to_speed(jtag_get_speed_khz(), &speed
);
1617 case CLOCK_MODE_RCLK
:
1618 jtag_rclk_to_speed(rclk_fallback_speed_khz
, &speed
);
1621 LOG_ERROR("BUG: unknown jtag clock mode");
1628 int jtag_get_speed_readable(int *khz
)
1630 return jtag
? jtag
->speed_div(jtag_get_speed(), khz
) : ERROR_OK
;
1633 void jtag_set_verify(bool enable
)
1635 jtag_verify
= enable
;
1638 bool jtag_will_verify()
1643 void jtag_set_verify_capture_ir(bool enable
)
1645 jtag_verify_capture_ir
= enable
;
1648 bool jtag_will_verify_capture_ir()
1650 return jtag_verify_capture_ir
;
1653 int jtag_power_dropout(int *dropout
)
1657 /* TODO: as the jtag interface is not valid all
1658 * we can do at the moment is exit OpenOCD */
1659 LOG_ERROR("No Valid JTAG Interface Configured.");
1662 return jtag
->power_dropout(dropout
);
1665 int jtag_srst_asserted(int *srst_asserted
)
1667 return jtag
->srst_asserted(srst_asserted
);
1670 enum reset_types
jtag_get_reset_config(void)
1672 return jtag_reset_config
;
1674 void jtag_set_reset_config(enum reset_types type
)
1676 jtag_reset_config
= type
;
1679 int jtag_get_trst(void)
1683 int jtag_get_srst(void)
1688 void jtag_set_nsrst_delay(unsigned delay
)
1690 jtag_nsrst_delay
= delay
;
1692 unsigned jtag_get_nsrst_delay(void)
1694 return jtag_nsrst_delay
;
1696 void jtag_set_ntrst_delay(unsigned delay
)
1698 jtag_ntrst_delay
= delay
;
1700 unsigned jtag_get_ntrst_delay(void)
1702 return jtag_ntrst_delay
;
1706 void jtag_set_nsrst_assert_width(unsigned delay
)
1708 jtag_nsrst_assert_width
= delay
;
1710 unsigned jtag_get_nsrst_assert_width(void)
1712 return jtag_nsrst_assert_width
;
1714 void jtag_set_ntrst_assert_width(unsigned delay
)
1716 jtag_ntrst_assert_width
= delay
;
1718 unsigned jtag_get_ntrst_assert_width(void)
1720 return jtag_ntrst_assert_width
;
Linking to existing account procedure
If you already have an account and want to add another login method
you
MUST first sign in with your existing account and
then change URL to read
https://review.openocd.org/login/?link
to get to this page again but this time it'll work for linking. Thank you.
SSH host keys fingerprints
1024 SHA256:YKx8b7u5ZWdcbp7/4AeXNaqElP49m6QrwfXaqQGJAOk gerrit-code-review@openocd.zylin.com (DSA)
384 SHA256:jHIbSQa4REvwCFG4cq5LBlBLxmxSqelQPem/EXIrxjk gerrit-code-review@openocd.org (ECDSA)
521 SHA256:UAOPYkU9Fjtcao0Ul/Rrlnj/OsQvt+pgdYSZ4jOYdgs gerrit-code-review@openocd.org (ECDSA)
256 SHA256:A13M5QlnozFOvTllybRZH6vm7iSt0XLxbA48yfc2yfY gerrit-code-review@openocd.org (ECDSA)
256 SHA256:spYMBqEYoAOtK7yZBrcwE8ZpYt6b68Cfh9yEVetvbXg gerrit-code-review@openocd.org (ED25519)
+--[ED25519 256]--+
|=.. |
|+o.. . |
|*.o . . |
|+B . . . |
|Bo. = o S |
|Oo.+ + = |
|oB=.* = . o |
| =+=.+ + E |
|. .=o . o |
+----[SHA256]-----+
2048 SHA256:0Onrb7/PHjpo6iVZ7xQX2riKN83FJ3KGU0TvI0TaFG4 gerrit-code-review@openocd.zylin.com (RSA)