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(struct jtag_tap
*active
,
46 void (*jtag_add_scan
)(struct jtag_tap
*active
, int in_num_fields
, const struct scan_field
*in_fields
, tap_state_t state
),
47 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
);
50 * The jtag_error variable is set when an error occurs while executing
51 * the queue. Application code may set this using jtag_set_error(),
52 * when an error occurs during processing that should be reported during
53 * jtag_execute_queue().
55 * Tts value may be checked with jtag_get_error() and cleared with
56 * jtag_error_clear(). This value is returned (and cleared) by
57 * jtag_execute_queue().
59 static int jtag_error
= ERROR_OK
;
61 static const char *jtag_event_strings
[] =
63 [JTAG_TRST_ASSERTED
] = "TAP reset",
64 [JTAG_TAP_EVENT_SETUP
] = "TAP setup",
65 [JTAG_TAP_EVENT_ENABLE
] = "TAP enabled",
66 [JTAG_TAP_EVENT_DISABLE
] = "TAP disabled",
70 * JTAG adapters must initialize with TRST and SRST de-asserted
71 * (they're negative logic, so that means *high*). But some
72 * hardware doesn't necessarily work that way ... so set things
73 * up so that jtag_init() always forces that state.
75 static int jtag_trst
= -1;
76 static int jtag_srst
= -1;
79 * List all TAPs that have been created.
81 static struct jtag_tap
*__jtag_all_taps
= NULL
;
83 * The number of TAPs in the __jtag_all_taps list, used to track the
84 * assigned chain position to new TAPs
86 static unsigned jtag_num_taps
= 0;
88 static enum reset_types jtag_reset_config
= RESET_NONE
;
89 static tap_state_t cmd_queue_end_state
= TAP_RESET
;
90 tap_state_t cmd_queue_cur_state
= TAP_RESET
;
92 static bool jtag_verify_capture_ir
= true;
93 static int jtag_verify
= 1;
95 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
96 static int jtag_nsrst_delay
= 0; /* default to no nSRST delay */
97 static int jtag_ntrst_delay
= 0; /* default to no nTRST delay */
98 static int jtag_nsrst_assert_width
= 0; /* width of assertion */
99 static int jtag_ntrst_assert_width
= 0; /* width of assertion */
102 * Contains a single callback along with a pointer that will be passed
103 * when an event occurs.
105 struct jtag_event_callback
{
107 jtag_event_handler_t callback
;
108 /// the private data to pass to the callback
110 /// the next callback
111 struct jtag_event_callback
* next
;
114 /* callbacks to inform high-level handlers about JTAG state changes */
115 static struct jtag_event_callback
*jtag_event_callbacks
;
118 static int speed_khz
= 0;
119 /* speed to fallback to when RCLK is requested but not supported */
120 static int rclk_fallback_speed_khz
= 0;
121 static enum {CLOCK_MODE_SPEED
, CLOCK_MODE_KHZ
, CLOCK_MODE_RCLK
} clock_mode
;
122 static int jtag_speed
= 0;
124 static struct jtag_interface
*jtag
= NULL
;
127 struct jtag_interface
*jtag_interface
= NULL
;
129 void jtag_set_error(int error
)
131 if ((error
== ERROR_OK
) || (jtag_error
!= ERROR_OK
))
135 int jtag_get_error(void)
139 int jtag_error_clear(void)
141 int temp
= jtag_error
;
142 jtag_error
= ERROR_OK
;
148 static bool jtag_poll
= 1;
150 bool is_jtag_poll_safe(void)
152 /* Polling can be disabled explicitly with set_enabled(false).
153 * It is also implicitly disabled while TRST is active and
154 * while SRST is gating the JTAG clock.
156 if (!jtag_poll
|| jtag_trst
!= 0)
158 return jtag_srst
== 0 || (jtag_reset_config
& RESET_SRST_NO_GATING
);
161 bool jtag_poll_get_enabled(void)
166 void jtag_poll_set_enabled(bool value
)
173 struct jtag_tap
*jtag_all_taps(void)
175 return __jtag_all_taps
;
178 unsigned jtag_tap_count(void)
180 return jtag_num_taps
;
183 unsigned jtag_tap_count_enabled(void)
185 struct jtag_tap
*t
= jtag_all_taps();
196 /// Append a new TAP to the chain of all taps.
197 void jtag_tap_add(struct jtag_tap
*t
)
199 t
->abs_chain_position
= jtag_num_taps
++;
201 struct jtag_tap
**tap
= &__jtag_all_taps
;
203 tap
= &(*tap
)->next_tap
;
207 /* returns a pointer to the n-th device in the scan chain */
208 static inline struct jtag_tap
*jtag_tap_by_position(unsigned n
)
210 struct jtag_tap
*t
= jtag_all_taps();
218 struct jtag_tap
*jtag_tap_by_string(const char *s
)
220 /* try by name first */
221 struct jtag_tap
*t
= jtag_all_taps();
225 if (0 == strcmp(t
->dotted_name
, s
))
230 /* no tap found by name, so try to parse the name as a number */
232 if (parse_uint(s
, &n
) != ERROR_OK
)
235 /* FIXME remove this numeric fallback code late June 2010, along
236 * with all info in the User's Guide that TAPs have numeric IDs.
237 * Also update "scan_chain" output to not display the numbers.
239 t
= jtag_tap_by_position(n
);
241 LOG_WARNING("Specify TAP '%s' by name, not number %u",
247 struct jtag_tap
* jtag_tap_next_enabled(struct jtag_tap
* p
)
249 p
= p
? p
->next_tap
: jtag_all_taps();
259 const char *jtag_tap_name(const struct jtag_tap
*tap
)
261 return (tap
== NULL
) ? "(unknown)" : tap
->dotted_name
;
265 int jtag_register_event_callback(jtag_event_handler_t callback
, void *priv
)
267 struct jtag_event_callback
**callbacks_p
= &jtag_event_callbacks
;
269 if (callback
== NULL
)
271 return ERROR_INVALID_ARGUMENTS
;
276 while ((*callbacks_p
)->next
)
277 callbacks_p
= &((*callbacks_p
)->next
);
278 callbacks_p
= &((*callbacks_p
)->next
);
281 (*callbacks_p
) = malloc(sizeof(struct jtag_event_callback
));
282 (*callbacks_p
)->callback
= callback
;
283 (*callbacks_p
)->priv
= priv
;
284 (*callbacks_p
)->next
= NULL
;
289 int jtag_unregister_event_callback(jtag_event_handler_t callback
, void *priv
)
291 struct jtag_event_callback
**callbacks_p
;
292 struct jtag_event_callback
**next
;
294 if (callback
== NULL
)
296 return ERROR_INVALID_ARGUMENTS
;
299 for (callbacks_p
= &jtag_event_callbacks
;
300 *callbacks_p
!= NULL
;
303 next
= &((*callbacks_p
)->next
);
305 if ((*callbacks_p
)->priv
!= priv
)
308 if ((*callbacks_p
)->callback
== callback
)
311 *callbacks_p
= *next
;
318 int jtag_call_event_callbacks(enum jtag_event event
)
320 struct jtag_event_callback
*callback
= jtag_event_callbacks
;
322 LOG_DEBUG("jtag event: %s", jtag_event_strings
[event
]);
326 struct jtag_event_callback
*next
;
328 /* callback may remove itself */
329 next
= callback
->next
;
330 callback
->callback(event
, callback
->priv
);
337 static void jtag_checks(void)
339 assert(jtag_trst
== 0);
342 static void jtag_prelude(tap_state_t state
)
346 assert(state
!= TAP_INVALID
);
348 cmd_queue_cur_state
= state
;
351 void jtag_alloc_in_value32(struct scan_field
*field
)
353 interface_jtag_alloc_in_value32(field
);
356 void jtag_add_ir_scan_noverify(struct jtag_tap
*active
, const struct scan_field
*in_fields
,
361 int retval
= interface_jtag_add_ir_scan(active
, in_fields
, state
);
362 jtag_set_error(retval
);
365 static void jtag_add_ir_scan_noverify_callback(struct jtag_tap
*active
, int dummy
, const struct scan_field
*in_fields
,
368 jtag_add_ir_scan_noverify(active
, in_fields
, state
);
371 void jtag_add_ir_scan(struct jtag_tap
*active
, struct scan_field
*in_fields
, tap_state_t state
)
373 assert(state
!= TAP_RESET
);
375 if (jtag_verify
&& jtag_verify_capture_ir
)
377 /* 8 x 32 bit id's is enough for all invocations */
379 /* if we are to run a verification of the ir scan, we need to get the input back.
380 * We may have to allocate space if the caller didn't ask for the input back.
382 in_fields
->check_value
= active
->expected
;
383 in_fields
->check_mask
= active
->expected_mask
;
384 jtag_add_scan_check(active
, jtag_add_ir_scan_noverify_callback
, 1, in_fields
, state
);
387 jtag_add_ir_scan_noverify(active
, in_fields
, state
);
391 void jtag_add_plain_ir_scan(int in_num_fields
, const struct scan_field
*in_fields
,
394 assert(state
!= TAP_RESET
);
398 int retval
= interface_jtag_add_plain_ir_scan(
399 in_num_fields
, in_fields
, state
);
400 jtag_set_error(retval
);
403 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
404 uint8_t *in_check_mask
, int num_bits
);
406 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
)
408 return jtag_check_value_inner((uint8_t *)data0
, (uint8_t *)data1
, (uint8_t *)data2
, (int)data3
);
411 static void jtag_add_scan_check(struct jtag_tap
*active
, void (*jtag_add_scan
)(struct jtag_tap
*active
, int in_num_fields
, const struct scan_field
*in_fields
, tap_state_t state
),
412 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
414 for (int i
= 0; i
< in_num_fields
; i
++)
416 struct scan_field
*field
= &in_fields
[i
];
417 field
->allocated
= 0;
419 if (field
->check_value
|| field
->in_value
)
421 interface_jtag_add_scan_check_alloc(field
);
425 jtag_add_scan(active
, in_num_fields
, in_fields
, state
);
427 for (int i
= 0; i
< in_num_fields
; i
++)
429 if ((in_fields
[i
].check_value
!= NULL
) && (in_fields
[i
].in_value
!= NULL
))
431 /* this is synchronous for a minidriver */
432 jtag_add_callback4(jtag_check_value_mask_callback
, (jtag_callback_data_t
)in_fields
[i
].in_value
,
433 (jtag_callback_data_t
)in_fields
[i
].check_value
,
434 (jtag_callback_data_t
)in_fields
[i
].check_mask
,
435 (jtag_callback_data_t
)in_fields
[i
].num_bits
);
437 if (in_fields
[i
].allocated
)
439 free(in_fields
[i
].in_value
);
441 if (in_fields
[i
].modified
)
443 in_fields
[i
].in_value
= NULL
;
448 void jtag_add_dr_scan_check(struct jtag_tap
*active
, int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
452 jtag_add_scan_check(active
, jtag_add_dr_scan
, in_num_fields
, in_fields
, state
);
455 jtag_add_dr_scan(active
, in_num_fields
, in_fields
, state
);
460 void jtag_add_dr_scan(struct jtag_tap
*active
, int in_num_fields
, const struct scan_field
*in_fields
,
463 assert(state
!= TAP_RESET
);
468 retval
= interface_jtag_add_dr_scan(active
, in_num_fields
, in_fields
, state
);
469 jtag_set_error(retval
);
472 void jtag_add_plain_dr_scan(int in_num_fields
, const struct scan_field
*in_fields
,
475 assert(state
!= TAP_RESET
);
480 retval
= interface_jtag_add_plain_dr_scan(in_num_fields
, in_fields
, state
);
481 jtag_set_error(retval
);
484 void jtag_add_tlr(void)
486 jtag_prelude(TAP_RESET
);
487 jtag_set_error(interface_jtag_add_tlr());
489 /* NOTE: order here matches TRST path in jtag_add_reset() */
490 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
491 jtag_notify_event(JTAG_TRST_ASSERTED
);
495 * If supported by the underlying adapter, this clocks a raw bit sequence
496 * onto TMS for switching betwen JTAG and SWD modes.
498 * DO NOT use this to bypass the integrity checks and logging provided
499 * by the jtag_add_pathmove() and jtag_add_statemove() calls.
501 * @param nbits How many bits to clock out.
502 * @param seq The bit sequence. The LSB is bit 0 of seq[0].
503 * @param state The JTAG tap state to record on completion. Use
504 * TAP_INVALID to represent being in in SWD mode.
506 * @todo Update naming conventions to stop assuming everything is JTAG.
508 int jtag_add_tms_seq(unsigned nbits
, const uint8_t *seq
, enum tap_state state
)
512 if (!(jtag
->supported
& DEBUG_CAP_TMS_SEQ
))
513 return ERROR_JTAG_NOT_IMPLEMENTED
;
516 cmd_queue_cur_state
= state
;
518 retval
= interface_add_tms_seq(nbits
, seq
, state
);
519 jtag_set_error(retval
);
523 void jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
525 tap_state_t cur_state
= cmd_queue_cur_state
;
527 /* the last state has to be a stable state */
528 if (!tap_is_state_stable(path
[num_states
- 1]))
530 LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
531 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
535 for (int i
= 0; i
< num_states
; i
++)
537 if (path
[i
] == TAP_RESET
)
539 LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
540 jtag_set_error(ERROR_JTAG_STATE_INVALID
);
544 if (tap_state_transition(cur_state
, true) != path
[i
]
545 && tap_state_transition(cur_state
, false) != path
[i
])
547 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
548 tap_state_name(cur_state
), tap_state_name(path
[i
]));
549 jtag_set_error(ERROR_JTAG_TRANSITION_INVALID
);
557 jtag_set_error(interface_jtag_add_pathmove(num_states
, path
));
558 cmd_queue_cur_state
= path
[num_states
- 1];
561 int jtag_add_statemove(tap_state_t goal_state
)
563 tap_state_t cur_state
= cmd_queue_cur_state
;
565 if (goal_state
!= cur_state
)
567 LOG_DEBUG("cur_state=%s goal_state=%s",
568 tap_state_name(cur_state
),
569 tap_state_name(goal_state
));
572 /* If goal is RESET, be paranoid and force that that transition
573 * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
575 if (goal_state
== TAP_RESET
)
577 else if (goal_state
== cur_state
)
578 /* nothing to do */ ;
580 else if (tap_is_state_stable(cur_state
) && tap_is_state_stable(goal_state
))
582 unsigned tms_bits
= tap_get_tms_path(cur_state
, goal_state
);
583 unsigned tms_count
= tap_get_tms_path_len(cur_state
, goal_state
);
584 tap_state_t moves
[8];
585 assert(tms_count
< ARRAY_SIZE(moves
));
587 for (unsigned i
= 0; i
< tms_count
; i
++, tms_bits
>>= 1)
589 bool bit
= tms_bits
& 1;
591 cur_state
= tap_state_transition(cur_state
, bit
);
592 moves
[i
] = cur_state
;
595 jtag_add_pathmove(tms_count
, moves
);
597 else if (tap_state_transition(cur_state
, true) == goal_state
598 || tap_state_transition(cur_state
, false) == goal_state
)
600 jtag_add_pathmove(1, &goal_state
);
609 void jtag_add_runtest(int num_cycles
, tap_state_t state
)
612 jtag_set_error(interface_jtag_add_runtest(num_cycles
, state
));
616 void jtag_add_clocks(int num_cycles
)
618 if (!tap_is_state_stable(cmd_queue_cur_state
))
620 LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
621 tap_state_name(cmd_queue_cur_state
));
622 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
629 jtag_set_error(interface_jtag_add_clocks(num_cycles
));
633 void jtag_add_reset(int req_tlr_or_trst
, int req_srst
)
635 int trst_with_tlr
= 0;
639 /* Without SRST, we must use target-specific JTAG operations
640 * on each target; callers should not be requesting SRST when
641 * that signal doesn't exist.
643 * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
644 * can kick in even if the JTAG adapter can't drive TRST.
647 if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
648 LOG_ERROR("BUG: can't assert SRST");
649 jtag_set_error(ERROR_FAIL
);
652 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0
653 && !req_tlr_or_trst
) {
654 LOG_ERROR("BUG: can't assert only SRST");
655 jtag_set_error(ERROR_FAIL
);
661 /* JTAG reset (entry to TAP_RESET state) can always be achieved
662 * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
663 * state first. TRST accelerates it, and bypasses those states.
665 * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
666 * can kick in even if the JTAG adapter can't drive SRST.
668 if (req_tlr_or_trst
) {
669 if (!(jtag_reset_config
& RESET_HAS_TRST
))
671 else if ((jtag_reset_config
& RESET_TRST_PULLS_SRST
) != 0
678 /* Maybe change TRST and/or SRST signal state */
679 if (jtag_srst
!= new_srst
|| jtag_trst
!= new_trst
) {
682 retval
= interface_jtag_add_reset(new_trst
, new_srst
);
683 if (retval
!= ERROR_OK
)
684 jtag_set_error(retval
);
686 retval
= jtag_execute_queue();
688 if (retval
!= ERROR_OK
) {
689 LOG_ERROR("TRST/SRST error %d", retval
);
694 /* SRST resets everything hooked up to that signal */
695 if (jtag_srst
!= new_srst
) {
696 jtag_srst
= new_srst
;
699 LOG_DEBUG("SRST line asserted");
700 if (jtag_nsrst_assert_width
)
701 jtag_add_sleep(jtag_nsrst_assert_width
* 1000);
704 LOG_DEBUG("SRST line released");
705 if (jtag_nsrst_delay
)
706 jtag_add_sleep(jtag_nsrst_delay
* 1000);
710 /* Maybe enter the JTAG TAP_RESET state ...
711 * - using only TMS, TCK, and the JTAG state machine
712 * - or else more directly, using TRST
714 * TAP_RESET should be invisible to non-debug parts of the system.
717 LOG_DEBUG("JTAG reset with TLR instead of TRST");
718 jtag_set_end_state(TAP_RESET
);
721 } else if (jtag_trst
!= new_trst
) {
722 jtag_trst
= new_trst
;
724 LOG_DEBUG("TRST line asserted");
725 tap_set_state(TAP_RESET
);
726 if (jtag_ntrst_assert_width
)
727 jtag_add_sleep(jtag_ntrst_assert_width
* 1000);
729 LOG_DEBUG("TRST line released");
730 if (jtag_ntrst_delay
)
731 jtag_add_sleep(jtag_ntrst_delay
* 1000);
733 /* We just asserted nTRST, so we're now in TAP_RESET.
734 * Inform possible listeners about this, now that
735 * JTAG instructions and data can be shifted. This
736 * sequence must match jtag_add_tlr().
738 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
739 jtag_notify_event(JTAG_TRST_ASSERTED
);
744 tap_state_t
jtag_set_end_state(tap_state_t state
)
746 if ((state
== TAP_DRSHIFT
)||(state
== TAP_IRSHIFT
))
748 LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
751 if (state
!= TAP_INVALID
)
752 cmd_queue_end_state
= state
;
753 return cmd_queue_end_state
;
756 tap_state_t
jtag_get_end_state(void)
758 return cmd_queue_end_state
;
761 void jtag_add_sleep(uint32_t us
)
763 /// @todo Here, keep_alive() appears to be a layering violation!!!
765 jtag_set_error(interface_jtag_add_sleep(us
));
768 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
769 uint8_t *in_check_mask
, int num_bits
)
771 int retval
= ERROR_OK
;
775 compare_failed
= buf_cmp_mask(captured
, in_check_value
, in_check_mask
, num_bits
);
777 compare_failed
= buf_cmp(captured
, in_check_value
, num_bits
);
779 if (compare_failed
) {
780 char *captured_str
, *in_check_value_str
;
781 int bits
= (num_bits
> DEBUG_JTAG_IOZ
)
785 /* NOTE: we've lost diagnostic context here -- 'which tap' */
787 captured_str
= buf_to_str(captured
, bits
, 16);
788 in_check_value_str
= buf_to_str(in_check_value
, bits
, 16);
790 LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
792 LOG_WARNING(" check_value: 0x%s", in_check_value_str
);
795 free(in_check_value_str
);
798 char *in_check_mask_str
;
800 in_check_mask_str
= buf_to_str(in_check_mask
, bits
, 16);
801 LOG_WARNING(" check_mask: 0x%s", in_check_mask_str
);
802 free(in_check_mask_str
);
805 retval
= ERROR_JTAG_QUEUE_FAILED
;
810 void jtag_check_value_mask(struct scan_field
*field
, uint8_t *value
, uint8_t *mask
)
812 assert(field
->in_value
!= NULL
);
816 /* no checking to do */
820 jtag_execute_queue_noclear();
822 int retval
= jtag_check_value_inner(field
->in_value
, value
, mask
, field
->num_bits
);
823 jtag_set_error(retval
);
828 int default_interface_jtag_execute_queue(void)
832 LOG_ERROR("No JTAG interface configured yet. "
833 "Issue 'init' command in startup scripts "
834 "before communicating with targets.");
838 return jtag
->execute_queue();
841 void jtag_execute_queue_noclear(void)
843 jtag_flush_queue_count
++;
844 jtag_set_error(interface_jtag_execute_queue());
847 int jtag_get_flush_queue_count(void)
849 return jtag_flush_queue_count
;
852 int jtag_execute_queue(void)
854 jtag_execute_queue_noclear();
855 return jtag_error_clear();
858 static int jtag_reset_callback(enum jtag_event event
, void *priv
)
860 struct jtag_tap
*tap
= priv
;
862 if (event
== JTAG_TRST_ASSERTED
)
864 tap
->enabled
= !tap
->disabled_after_reset
;
866 /* current instruction is either BYPASS or IDCODE */
867 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
874 void jtag_sleep(uint32_t us
)
876 alive_sleep(us
/1000);
879 /* Maximum number of enabled JTAG devices we expect in the scan chain,
880 * plus one (to detect garbage at the end). Devices that don't support
881 * IDCODE take up fewer bits, possibly allowing a few more devices.
883 #define JTAG_MAX_CHAIN_SIZE 20
885 #define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
886 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
887 #define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
889 /* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
890 * know that no valid TAP will have it as an IDCODE value.
892 #define END_OF_CHAIN_FLAG 0x000000ff
894 /* a larger IR length than we ever expect to autoprobe */
895 #define JTAG_IRLEN_MAX 60
897 static int jtag_examine_chain_execute(uint8_t *idcode_buffer
, unsigned num_idcode
)
899 struct scan_field field
= {
900 .num_bits
= num_idcode
* 32,
901 .out_value
= idcode_buffer
,
902 .in_value
= idcode_buffer
,
905 // initialize to the end of chain ID value
906 for (unsigned i
= 0; i
< JTAG_MAX_CHAIN_SIZE
; i
++)
907 buf_set_u32(idcode_buffer
, i
* 32, 32, END_OF_CHAIN_FLAG
);
909 jtag_add_plain_dr_scan(1, &field
, TAP_DRPAUSE
);
911 return jtag_execute_queue();
914 static bool jtag_examine_chain_check(uint8_t *idcodes
, unsigned count
)
916 uint8_t zero_check
= 0x0;
917 uint8_t one_check
= 0xff;
919 for (unsigned i
= 0; i
< count
* 4; i
++)
921 zero_check
|= idcodes
[i
];
922 one_check
&= idcodes
[i
];
925 /* if there wasn't a single non-zero bit or if all bits were one,
926 * the scan is not valid. We wrote a mix of both values; either
928 * - There's a hardware issue (almost certainly):
929 * + all-zeroes can mean a target stuck in JTAG reset
930 * + all-ones tends to mean no target
931 * - The scan chain is WAY longer than we can handle, *AND* either
932 * + there are several hundreds of TAPs in bypass, or
933 * + at least a few dozen TAPs all have an all-ones IDCODE
935 if (zero_check
== 0x00 || one_check
== 0xff)
937 LOG_ERROR("JTAG scan chain interrogation failed: all %s",
938 (zero_check
== 0x00) ? "zeroes" : "ones");
939 LOG_ERROR("Check JTAG interface, timings, target power, etc.");
945 static void jtag_examine_chain_display(enum log_levels level
, const char *msg
,
946 const char *name
, uint32_t idcode
)
948 log_printf_lf(level
, __FILE__
, __LINE__
, __FUNCTION__
,
949 "JTAG tap: %s %16.16s: 0x%08x "
950 "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
952 (unsigned int)idcode
,
953 (unsigned int)EXTRACT_MFG(idcode
),
954 (unsigned int)EXTRACT_PART(idcode
),
955 (unsigned int)EXTRACT_VER(idcode
));
958 static bool jtag_idcode_is_final(uint32_t idcode
)
961 * Some devices, such as AVR8, will output all 1's instead
962 * of TDI input value at end of chain. Allow those values
963 * instead of failing.
965 return idcode
== END_OF_CHAIN_FLAG
|| idcode
== 0xFFFFFFFF;
969 * This helper checks that remaining bits in the examined chain data are
970 * all as expected, but a single JTAG device requires only 64 bits to be
971 * read back correctly. This can help identify and diagnose problems
972 * with the JTAG chain earlier, gives more helpful/explicit error messages.
973 * Returns TRUE iff garbage was found.
975 static bool jtag_examine_chain_end(uint8_t *idcodes
, unsigned count
, unsigned max
)
977 bool triggered
= false;
978 for (; count
< max
- 31; count
+= 32)
980 uint32_t idcode
= buf_get_u32(idcodes
, count
, 32);
982 /* do not trigger the warning if the data looks good */
983 if (jtag_idcode_is_final(idcode
))
985 LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
986 count
, (unsigned int)idcode
);
992 static bool jtag_examine_chain_match_tap(const struct jtag_tap
*tap
)
994 uint32_t idcode
= tap
->idcode
;
996 /* ignore expected BYPASS codes; warn otherwise */
997 if (0 == tap
->expected_ids_cnt
&& !idcode
)
1000 /* optionally ignore the JTAG version field */
1001 uint32_t mask
= tap
->ignore_version
? ~(0xff << 24) : ~0;
1005 /* Loop over the expected identification codes and test for a match */
1006 unsigned ii
, limit
= tap
->expected_ids_cnt
;
1008 for (ii
= 0; ii
< limit
; ii
++)
1010 uint32_t expected
= tap
->expected_ids
[ii
] & mask
;
1012 if (idcode
== expected
)
1015 /* treat "-expected-id 0" as a "don't-warn" wildcard */
1016 if (0 == tap
->expected_ids
[ii
])
1020 /* If none of the expected ids matched, warn */
1021 jtag_examine_chain_display(LOG_LVL_WARNING
, "UNEXPECTED",
1022 tap
->dotted_name
, tap
->idcode
);
1023 for (ii
= 0; ii
< limit
; ii
++)
1027 snprintf(msg
, sizeof(msg
), "expected %u of %u", ii
+ 1, limit
);
1028 jtag_examine_chain_display(LOG_LVL_ERROR
, msg
,
1029 tap
->dotted_name
, tap
->expected_ids
[ii
]);
1034 /* Try to examine chain layout according to IEEE 1149.1 §12
1035 * This is called a "blind interrogation" of the scan chain.
1037 static int jtag_examine_chain(void)
1039 uint8_t idcode_buffer
[JTAG_MAX_CHAIN_SIZE
* 4];
1043 bool autoprobe
= false;
1045 /* DR scan to collect BYPASS or IDCODE register contents.
1046 * Then make sure the scan data has both ones and zeroes.
1048 LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
1049 retval
= jtag_examine_chain_execute(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
);
1050 if (retval
!= ERROR_OK
)
1052 if (!jtag_examine_chain_check(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
))
1053 return ERROR_JTAG_INIT_FAILED
;
1055 /* point at the 1st tap */
1056 struct jtag_tap
*tap
= jtag_tap_next_enabled(NULL
);
1062 tap
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31;
1063 tap
= jtag_tap_next_enabled(tap
))
1065 uint32_t idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1067 if ((idcode
& 1) == 0)
1069 /* Zero for LSB indicates a device in bypass */
1070 LOG_INFO("TAP %s does not have IDCODE",
1073 tap
->hasidcode
= false;
1079 /* Friendly devices support IDCODE */
1080 tap
->hasidcode
= true;
1081 jtag_examine_chain_display(LOG_LVL_INFO
,
1083 tap
->dotted_name
, idcode
);
1087 tap
->idcode
= idcode
;
1089 /* ensure the TAP ID matches what was expected */
1090 if (!jtag_examine_chain_match_tap(tap
))
1091 retval
= ERROR_JTAG_INIT_SOFT_FAIL
;
1094 /* Fail if too many TAPs were enabled for us to verify them all. */
1096 LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
1098 return ERROR_JTAG_INIT_FAILED
;
1101 /* if autoprobing, the tap list is still empty ... populate it! */
1102 while (autoprobe
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31) {
1106 /* Is there another TAP? */
1107 idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1108 if (jtag_idcode_is_final(idcode
))
1111 /* Default everything in this TAP except IR length.
1113 * REVISIT create a jtag_alloc(chip, tap) routine, and
1114 * share it with jim_newtap_cmd().
1116 tap
= calloc(1, sizeof *tap
);
1120 sprintf(buf
, "auto%d", tapcount
++);
1121 tap
->chip
= strdup(buf
);
1122 tap
->tapname
= strdup("tap");
1124 sprintf(buf
, "%s.%s", tap
->chip
, tap
->tapname
);
1125 tap
->dotted_name
= strdup(buf
);
1127 /* tap->ir_length == 0 ... signifying irlen autoprobe */
1128 tap
->ir_capture_mask
= 0x03;
1129 tap
->ir_capture_value
= 0x01;
1131 tap
->enabled
= true;
1133 if ((idcode
& 1) == 0) {
1135 tap
->hasidcode
= false;
1138 tap
->hasidcode
= true;
1139 tap
->idcode
= idcode
;
1141 tap
->expected_ids_cnt
= 1;
1142 tap
->expected_ids
= malloc(sizeof(uint32_t));
1143 tap
->expected_ids
[0] = idcode
;
1146 LOG_WARNING("AUTO %s - use \"jtag newtap "
1147 "%s %s -expected-id 0x%8.8" PRIx32
" ...\"",
1148 tap
->dotted_name
, tap
->chip
, tap
->tapname
,
1154 /* After those IDCODE or BYPASS register values should be
1155 * only the data we fed into the scan chain.
1157 if (jtag_examine_chain_end(idcode_buffer
, bit_count
,
1158 8 * sizeof(idcode_buffer
))) {
1159 LOG_ERROR("double-check your JTAG setup (interface, "
1160 "speed, missing TAPs, ...)");
1161 return ERROR_JTAG_INIT_FAILED
;
1164 /* Return success or, for backwards compatibility if only
1165 * some IDCODE values mismatched, a soft/continuable fault.
1171 * Validate the date loaded by entry to the Capture-IR state, to help
1172 * find errors related to scan chain configuration (wrong IR lengths)
1175 * Entry state can be anything. On non-error exit, all TAPs are in
1176 * bypass mode. On error exits, the scan chain is reset.
1178 static int jtag_validate_ircapture(void)
1180 struct jtag_tap
*tap
;
1181 int total_ir_length
= 0;
1182 uint8_t *ir_test
= NULL
;
1183 struct scan_field field
;
1188 /* when autoprobing, accomodate huge IR lengths */
1189 for (tap
= NULL
, total_ir_length
= 0;
1190 (tap
= jtag_tap_next_enabled(tap
)) != NULL
;
1191 total_ir_length
+= tap
->ir_length
) {
1192 if (tap
->ir_length
== 0)
1193 total_ir_length
+= JTAG_IRLEN_MAX
;
1196 /* increase length to add 2 bit sentinel after scan */
1197 total_ir_length
+= 2;
1199 ir_test
= malloc(DIV_ROUND_UP(total_ir_length
, 8));
1200 if (ir_test
== NULL
)
1203 /* after this scan, all TAPs will capture BYPASS instructions */
1204 buf_set_ones(ir_test
, total_ir_length
);
1206 field
.num_bits
= total_ir_length
;
1207 field
.out_value
= ir_test
;
1208 field
.in_value
= ir_test
;
1210 jtag_add_plain_ir_scan(1, &field
, TAP_IDLE
);
1212 LOG_DEBUG("IR capture validation scan");
1213 retval
= jtag_execute_queue();
1214 if (retval
!= ERROR_OK
)
1221 tap
= jtag_tap_next_enabled(tap
);
1226 /* If we're autoprobing, guess IR lengths. They must be at
1227 * least two bits. Guessing will fail if (a) any TAP does
1228 * not conform to the JTAG spec; or (b) when the upper bits
1229 * captured from some conforming TAP are nonzero. Or if
1230 * (c) an IR length is longer than 32 bits -- which is only
1231 * an implementation limit, which could someday be raised.
1233 * REVISIT optimization: if there's a *single* TAP we can
1234 * lift restrictions (a) and (b) by scanning a recognizable
1235 * pattern before the all-ones BYPASS. Check for where the
1236 * pattern starts in the result, instead of an 0...01 value.
1238 * REVISIT alternative approach: escape to some tcl code
1239 * which could provide more knowledge, based on IDCODE; and
1240 * only guess when that has no success.
1242 if (tap
->ir_length
== 0) {
1244 while ((val
= buf_get_u32(ir_test
, chain_pos
,
1245 tap
->ir_length
+ 1)) == 1
1246 && tap
->ir_length
<= 32) {
1249 LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
1250 jtag_tap_name(tap
), tap
->ir_length
);
1253 /* Validate the two LSBs, which must be 01 per JTAG spec.
1255 * Or ... more bits could be provided by TAP declaration.
1256 * Plus, some taps (notably in i.MX series chips) violate
1257 * this part of the JTAG spec, so their capture mask/value
1258 * attributes might disable this test.
1260 val
= buf_get_u32(ir_test
, chain_pos
, tap
->ir_length
);
1261 if ((val
& tap
->ir_capture_mask
) != tap
->ir_capture_value
) {
1262 LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x%0*x",
1264 (tap
->ir_length
+ 7) / tap
->ir_length
,
1266 (tap
->ir_length
+ 7) / tap
->ir_length
,
1267 (unsigned) tap
->ir_capture_value
);
1269 retval
= ERROR_JTAG_INIT_FAILED
;
1272 LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap
),
1273 (tap
->ir_length
+ 7) / tap
->ir_length
, val
);
1274 chain_pos
+= tap
->ir_length
;
1277 /* verify the '11' sentinel we wrote is returned at the end */
1278 val
= buf_get_u32(ir_test
, chain_pos
, 2);
1281 char *cbuf
= buf_to_str(ir_test
, total_ir_length
, 16);
1283 LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
1286 retval
= ERROR_JTAG_INIT_FAILED
;
1291 if (retval
!= ERROR_OK
) {
1293 jtag_execute_queue();
1299 void jtag_tap_init(struct jtag_tap
*tap
)
1301 unsigned ir_len_bits
;
1302 unsigned ir_len_bytes
;
1304 /* if we're autoprobing, cope with potentially huge ir_length */
1305 ir_len_bits
= tap
->ir_length
? : JTAG_IRLEN_MAX
;
1306 ir_len_bytes
= DIV_ROUND_UP(ir_len_bits
, 8);
1308 tap
->expected
= calloc(1, ir_len_bytes
);
1309 tap
->expected_mask
= calloc(1, ir_len_bytes
);
1310 tap
->cur_instr
= malloc(ir_len_bytes
);
1312 /// @todo cope better with ir_length bigger than 32 bits
1313 if (ir_len_bits
> 32)
1316 buf_set_u32(tap
->expected
, 0, ir_len_bits
, tap
->ir_capture_value
);
1317 buf_set_u32(tap
->expected_mask
, 0, ir_len_bits
, tap
->ir_capture_mask
);
1319 // TAP will be in bypass mode after jtag_validate_ircapture()
1321 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
1323 // register the reset callback for the TAP
1324 jtag_register_event_callback(&jtag_reset_callback
, tap
);
1326 LOG_DEBUG("Created Tap: %s @ abs position %d, "
1327 "irlen %d, capture: 0x%x mask: 0x%x", tap
->dotted_name
,
1328 tap
->abs_chain_position
, tap
->ir_length
,
1329 (unsigned) tap
->ir_capture_value
,
1330 (unsigned) tap
->ir_capture_mask
);
1334 void jtag_tap_free(struct jtag_tap
*tap
)
1336 jtag_unregister_event_callback(&jtag_reset_callback
, tap
);
1338 /// @todo is anything missing? no memory leaks please
1339 free((void *)tap
->expected
);
1340 free((void *)tap
->expected_ids
);
1341 free((void *)tap
->chip
);
1342 free((void *)tap
->tapname
);
1343 free((void *)tap
->dotted_name
);
1347 int jtag_interface_init(struct command_context
*cmd_ctx
)
1352 if (!jtag_interface
)
1354 /* nothing was previously specified by "interface" command */
1355 LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
1356 return ERROR_JTAG_INVALID_INTERFACE
;
1359 jtag
= jtag_interface
;
1360 if (jtag_interface
->init() != ERROR_OK
)
1363 return ERROR_JTAG_INIT_FAILED
;
1366 int requested_khz
= jtag_get_speed_khz();
1367 int actual_khz
= requested_khz
;
1368 int retval
= jtag_get_speed_readable(&actual_khz
);
1369 if (ERROR_OK
!= retval
)
1370 LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
1371 else if (actual_khz
)
1373 if ((CLOCK_MODE_RCLK
== clock_mode
)
1374 || ((CLOCK_MODE_KHZ
== clock_mode
) && !requested_khz
))
1376 LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
1380 LOG_INFO("clock speed %d kHz", actual_khz
);
1383 LOG_INFO("RCLK (adaptive clock speed)");
1388 int jtag_init_inner(struct command_context
*cmd_ctx
)
1390 struct jtag_tap
*tap
;
1392 bool issue_setup
= true;
1394 LOG_DEBUG("Init JTAG chain");
1396 tap
= jtag_tap_next_enabled(NULL
);
1398 /* Once JTAG itself is properly set up, and the scan chain
1399 * isn't absurdly large, IDCODE autoprobe should work fine.
1401 * But ... IRLEN autoprobe can fail even on systems which
1402 * are fully conformant to JTAG. Also, JTAG setup can be
1403 * quite finicky on some systems.
1405 * REVISIT: if TAP autoprobe works OK, then in many cases
1406 * we could escape to tcl code and set up targets based on
1407 * the TAP's IDCODE values.
1409 LOG_WARNING("There are no enabled taps. "
1410 "AUTO PROBING MIGHT NOT WORK!!");
1412 /* REVISIT default clock will often be too fast ... */
1416 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1419 /* Examine DR values first. This discovers problems which will
1420 * prevent communication ... hardware issues like TDO stuck, or
1421 * configuring the wrong number of (enabled) TAPs.
1423 retval
= jtag_examine_chain();
1426 /* complete success */
1428 case ERROR_JTAG_INIT_SOFT_FAIL
:
1429 /* For backward compatibility reasons, try coping with
1430 * configuration errors involving only ID mismatches.
1431 * We might be able to talk to the devices.
1433 LOG_ERROR("Trying to use configured scan chain anyway...");
1434 issue_setup
= false;
1437 /* some hard error; already issued diagnostics */
1441 /* Now look at IR values. Problems here will prevent real
1442 * communication. They mostly mean that the IR length is
1443 * wrong ... or that the IR capture value is wrong. (The
1444 * latter is uncommon, but easily worked around: provide
1445 * ircapture/irmask values during TAP setup.)
1447 retval
= jtag_validate_ircapture();
1448 if (retval
!= ERROR_OK
)
1452 jtag_notify_event(JTAG_TAP_EVENT_SETUP
);
1454 LOG_WARNING("Bypassing JTAG setup events due to errors");
1460 int jtag_interface_quit(void)
1462 if (!jtag
|| !jtag
->quit
)
1465 // close the JTAG interface
1466 int result
= jtag
->quit();
1467 if (ERROR_OK
!= result
)
1468 LOG_ERROR("failed: %d", result
);
1474 int jtag_init_reset(struct command_context
*cmd_ctx
)
1478 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1481 LOG_DEBUG("Initializing with hard TRST+SRST reset");
1484 * This procedure is used by default when OpenOCD triggers a reset.
1485 * It's now done through an overridable Tcl "init_reset" wrapper.
1487 * This started out as a more powerful "get JTAG working" reset than
1488 * jtag_init_inner(), applying TRST because some chips won't activate
1489 * JTAG without a TRST cycle (presumed to be async, though some of
1490 * those chips synchronize JTAG activation using TCK).
1492 * But some chips only activate JTAG as part of an SRST cycle; SRST
1493 * got mixed in. So it became a hard reset routine, which got used
1494 * in more places, and which coped with JTAG reset being forced as
1495 * part of SRST (srst_pulls_trst).
1497 * And even more corner cases started to surface: TRST and/or SRST
1498 * assertion timings matter; some chips need other JTAG operations;
1499 * TRST/SRST sequences can need to be different from these, etc.
1501 * Systems should override that wrapper to support system-specific
1502 * requirements that this not-fully-generic code doesn't handle.
1504 * REVISIT once Tcl code can read the reset_config modes, this won't
1505 * need to be a C routine at all...
1507 jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
1508 if (jtag_reset_config
& RESET_HAS_SRST
)
1510 jtag_add_reset(1, 1);
1511 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) == 0)
1512 jtag_add_reset(0, 1);
1514 jtag_add_reset(0, 0);
1515 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1518 /* Check that we can communication on the JTAG chain + eventually we want to
1519 * be able to perform enumeration only after OpenOCD has started
1520 * telnet and GDB server
1522 * That would allow users to more easily perform any magic they need to before
1525 return jtag_init_inner(cmd_ctx
);
1528 int jtag_init(struct command_context
*cmd_ctx
)
1532 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1535 /* guard against oddball hardware: force resets to be inactive */
1536 jtag_add_reset(0, 0);
1537 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1540 if (Jim_Eval_Named(cmd_ctx
->interp
, "jtag_init", __FILE__
, __LINE__
) != JIM_OK
)
1546 unsigned jtag_get_speed_khz(void)
1551 static int jtag_khz_to_speed(unsigned khz
, int* speed
)
1553 LOG_DEBUG("convert khz to interface specific speed value");
1557 LOG_DEBUG("have interface set up");
1559 int retval
= jtag
->khz(jtag_get_speed_khz(), &speed_div1
);
1560 if (ERROR_OK
!= retval
)
1564 *speed
= speed_div1
;
1569 static int jtag_rclk_to_speed(unsigned fallback_speed_khz
, int* speed
)
1571 int retval
= jtag_khz_to_speed(0, speed
);
1572 if ((ERROR_OK
!= retval
) && fallback_speed_khz
)
1574 LOG_DEBUG("trying fallback speed...");
1575 retval
= jtag_khz_to_speed(fallback_speed_khz
, speed
);
1580 static int jtag_set_speed(int speed
)
1583 /* this command can be called during CONFIG,
1584 * in which case jtag isn't initialized */
1585 return jtag
? jtag
->speed(speed
) : ERROR_OK
;
1588 int jtag_config_khz(unsigned khz
)
1590 LOG_DEBUG("handle jtag khz");
1591 clock_mode
= CLOCK_MODE_KHZ
;
1593 int retval
= jtag_khz_to_speed(khz
, &speed
);
1594 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1597 int jtag_config_rclk(unsigned fallback_speed_khz
)
1599 LOG_DEBUG("handle jtag rclk");
1600 clock_mode
= CLOCK_MODE_RCLK
;
1601 rclk_fallback_speed_khz
= fallback_speed_khz
;
1603 int retval
= jtag_rclk_to_speed(fallback_speed_khz
, &speed
);
1604 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1607 int jtag_get_speed(void)
1612 case CLOCK_MODE_SPEED
:
1615 case CLOCK_MODE_KHZ
:
1616 jtag_khz_to_speed(jtag_get_speed_khz(), &speed
);
1618 case CLOCK_MODE_RCLK
:
1619 jtag_rclk_to_speed(rclk_fallback_speed_khz
, &speed
);
1622 LOG_ERROR("BUG: unknown jtag clock mode");
1629 int jtag_get_speed_readable(int *khz
)
1631 return jtag
? jtag
->speed_div(jtag_get_speed(), khz
) : ERROR_OK
;
1634 void jtag_set_verify(bool enable
)
1636 jtag_verify
= enable
;
1639 bool jtag_will_verify()
1644 void jtag_set_verify_capture_ir(bool enable
)
1646 jtag_verify_capture_ir
= enable
;
1649 bool jtag_will_verify_capture_ir()
1651 return jtag_verify_capture_ir
;
1654 int jtag_power_dropout(int *dropout
)
1658 /* TODO: as the jtag interface is not valid all
1659 * we can do at the moment is exit OpenOCD */
1660 LOG_ERROR("No Valid JTAG Interface Configured.");
1663 return jtag
->power_dropout(dropout
);
1666 int jtag_srst_asserted(int *srst_asserted
)
1668 return jtag
->srst_asserted(srst_asserted
);
1671 enum reset_types
jtag_get_reset_config(void)
1673 return jtag_reset_config
;
1675 void jtag_set_reset_config(enum reset_types type
)
1677 jtag_reset_config
= type
;
1680 int jtag_get_trst(void)
1684 int jtag_get_srst(void)
1689 void jtag_set_nsrst_delay(unsigned delay
)
1691 jtag_nsrst_delay
= delay
;
1693 unsigned jtag_get_nsrst_delay(void)
1695 return jtag_nsrst_delay
;
1697 void jtag_set_ntrst_delay(unsigned delay
)
1699 jtag_ntrst_delay
= delay
;
1701 unsigned jtag_get_ntrst_delay(void)
1703 return jtag_ntrst_delay
;
1707 void jtag_set_nsrst_assert_width(unsigned delay
)
1709 jtag_nsrst_assert_width
= delay
;
1711 unsigned jtag_get_nsrst_assert_width(void)
1713 return jtag_nsrst_assert_width
;
1715 void jtag_set_ntrst_assert_width(unsigned delay
)
1717 jtag_ntrst_assert_width
= delay
;
1719 unsigned jtag_get_ntrst_assert_width(void)
1721 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)