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 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 adapter_nsrst_delay
= 0; /* default to no nSRST delay */
96 static int jtag_ntrst_delay
= 0; /* default to no nTRST delay */
97 static int adapter_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(struct jtag_tap
*active
, const struct scan_field
*in_fields
,
360 int retval
= interface_jtag_add_ir_scan(active
, in_fields
, state
);
361 jtag_set_error(retval
);
364 static void jtag_add_ir_scan_noverify_callback(struct jtag_tap
*active
, int dummy
, const struct scan_field
*in_fields
,
367 jtag_add_ir_scan_noverify(active
, in_fields
, state
);
370 void jtag_add_ir_scan(struct jtag_tap
*active
, struct scan_field
*in_fields
, tap_state_t state
)
372 assert(state
!= TAP_RESET
);
374 if (jtag_verify
&& jtag_verify_capture_ir
)
376 /* 8 x 32 bit id's is enough for all invocations */
378 /* if we are to run a verification of the ir scan, we need to get the input back.
379 * We may have to allocate space if the caller didn't ask for the input back.
381 in_fields
->check_value
= active
->expected
;
382 in_fields
->check_mask
= active
->expected_mask
;
383 jtag_add_scan_check(active
, jtag_add_ir_scan_noverify_callback
, 1, in_fields
, state
);
386 jtag_add_ir_scan_noverify(active
, in_fields
, state
);
390 void jtag_add_plain_ir_scan(int num_bits
, const uint8_t *out_bits
, uint8_t *in_bits
,
393 assert(out_bits
!= NULL
);
394 assert(state
!= TAP_RESET
);
398 int retval
= interface_jtag_add_plain_ir_scan(
399 num_bits
, out_bits
, in_bits
, 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 num_bits
, const uint8_t *out_bits
, uint8_t *in_bits
,
475 assert(out_bits
!= NULL
);
476 assert(state
!= TAP_RESET
);
481 retval
= interface_jtag_add_plain_dr_scan(num_bits
, out_bits
, in_bits
, state
);
482 jtag_set_error(retval
);
485 void jtag_add_tlr(void)
487 jtag_prelude(TAP_RESET
);
488 jtag_set_error(interface_jtag_add_tlr());
490 /* NOTE: order here matches TRST path in jtag_add_reset() */
491 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
492 jtag_notify_event(JTAG_TRST_ASSERTED
);
496 * If supported by the underlying adapter, this clocks a raw bit sequence
497 * onto TMS for switching betwen JTAG and SWD modes.
499 * DO NOT use this to bypass the integrity checks and logging provided
500 * by the jtag_add_pathmove() and jtag_add_statemove() calls.
502 * @param nbits How many bits to clock out.
503 * @param seq The bit sequence. The LSB is bit 0 of seq[0].
504 * @param state The JTAG tap state to record on completion. Use
505 * TAP_INVALID to represent being in in SWD mode.
507 * @todo Update naming conventions to stop assuming everything is JTAG.
509 int jtag_add_tms_seq(unsigned nbits
, const uint8_t *seq
, enum tap_state state
)
513 if (!(jtag
->supported
& DEBUG_CAP_TMS_SEQ
))
514 return ERROR_JTAG_NOT_IMPLEMENTED
;
517 cmd_queue_cur_state
= state
;
519 retval
= interface_add_tms_seq(nbits
, seq
, state
);
520 jtag_set_error(retval
);
524 void jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
526 tap_state_t cur_state
= cmd_queue_cur_state
;
528 /* the last state has to be a stable state */
529 if (!tap_is_state_stable(path
[num_states
- 1]))
531 LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
532 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
536 for (int i
= 0; i
< num_states
; i
++)
538 if (path
[i
] == TAP_RESET
)
540 LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
541 jtag_set_error(ERROR_JTAG_STATE_INVALID
);
545 if (tap_state_transition(cur_state
, true) != path
[i
]
546 && tap_state_transition(cur_state
, false) != path
[i
])
548 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
549 tap_state_name(cur_state
), tap_state_name(path
[i
]));
550 jtag_set_error(ERROR_JTAG_TRANSITION_INVALID
);
558 jtag_set_error(interface_jtag_add_pathmove(num_states
, path
));
559 cmd_queue_cur_state
= path
[num_states
- 1];
562 int jtag_add_statemove(tap_state_t goal_state
)
564 tap_state_t cur_state
= cmd_queue_cur_state
;
566 if (goal_state
!= cur_state
)
568 LOG_DEBUG("cur_state=%s goal_state=%s",
569 tap_state_name(cur_state
),
570 tap_state_name(goal_state
));
573 /* If goal is RESET, be paranoid and force that that transition
574 * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
576 if (goal_state
== TAP_RESET
)
578 else if (goal_state
== cur_state
)
579 /* nothing to do */ ;
581 else if (tap_is_state_stable(cur_state
) && tap_is_state_stable(goal_state
))
583 unsigned tms_bits
= tap_get_tms_path(cur_state
, goal_state
);
584 unsigned tms_count
= tap_get_tms_path_len(cur_state
, goal_state
);
585 tap_state_t moves
[8];
586 assert(tms_count
< ARRAY_SIZE(moves
));
588 for (unsigned i
= 0; i
< tms_count
; i
++, tms_bits
>>= 1)
590 bool bit
= tms_bits
& 1;
592 cur_state
= tap_state_transition(cur_state
, bit
);
593 moves
[i
] = cur_state
;
596 jtag_add_pathmove(tms_count
, moves
);
598 else if (tap_state_transition(cur_state
, true) == goal_state
599 || tap_state_transition(cur_state
, false) == goal_state
)
601 jtag_add_pathmove(1, &goal_state
);
610 void jtag_add_runtest(int num_cycles
, tap_state_t state
)
613 jtag_set_error(interface_jtag_add_runtest(num_cycles
, state
));
617 void jtag_add_clocks(int num_cycles
)
619 if (!tap_is_state_stable(cmd_queue_cur_state
))
621 LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
622 tap_state_name(cmd_queue_cur_state
));
623 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
630 jtag_set_error(interface_jtag_add_clocks(num_cycles
));
634 void jtag_add_reset(int req_tlr_or_trst
, int req_srst
)
636 int trst_with_tlr
= 0;
640 /* Without SRST, we must use target-specific JTAG operations
641 * on each target; callers should not be requesting SRST when
642 * that signal doesn't exist.
644 * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
645 * can kick in even if the JTAG adapter can't drive TRST.
648 if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
649 LOG_ERROR("BUG: can't assert SRST");
650 jtag_set_error(ERROR_FAIL
);
653 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0
654 && !req_tlr_or_trst
) {
655 LOG_ERROR("BUG: can't assert only SRST");
656 jtag_set_error(ERROR_FAIL
);
662 /* JTAG reset (entry to TAP_RESET state) can always be achieved
663 * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
664 * state first. TRST accelerates it, and bypasses those states.
666 * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
667 * can kick in even if the JTAG adapter can't drive SRST.
669 if (req_tlr_or_trst
) {
670 if (!(jtag_reset_config
& RESET_HAS_TRST
))
672 else if ((jtag_reset_config
& RESET_TRST_PULLS_SRST
) != 0
679 /* Maybe change TRST and/or SRST signal state */
680 if (jtag_srst
!= new_srst
|| jtag_trst
!= new_trst
) {
683 retval
= interface_jtag_add_reset(new_trst
, new_srst
);
684 if (retval
!= ERROR_OK
)
685 jtag_set_error(retval
);
687 retval
= jtag_execute_queue();
689 if (retval
!= ERROR_OK
) {
690 LOG_ERROR("TRST/SRST error %d", retval
);
695 /* SRST resets everything hooked up to that signal */
696 if (jtag_srst
!= new_srst
) {
697 jtag_srst
= new_srst
;
700 LOG_DEBUG("SRST line asserted");
701 if (adapter_nsrst_assert_width
)
702 jtag_add_sleep(adapter_nsrst_assert_width
* 1000);
705 LOG_DEBUG("SRST line released");
706 if (adapter_nsrst_delay
)
707 jtag_add_sleep(adapter_nsrst_delay
* 1000);
711 /* Maybe enter the JTAG TAP_RESET state ...
712 * - using only TMS, TCK, and the JTAG state machine
713 * - or else more directly, using TRST
715 * TAP_RESET should be invisible to non-debug parts of the system.
718 LOG_DEBUG("JTAG reset with TLR instead of TRST");
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 void jtag_add_sleep(uint32_t us
)
746 /// @todo Here, keep_alive() appears to be a layering violation!!!
748 jtag_set_error(interface_jtag_add_sleep(us
));
751 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
752 uint8_t *in_check_mask
, int num_bits
)
754 int retval
= ERROR_OK
;
758 compare_failed
= buf_cmp_mask(captured
, in_check_value
, in_check_mask
, num_bits
);
760 compare_failed
= buf_cmp(captured
, in_check_value
, num_bits
);
762 if (compare_failed
) {
763 char *captured_str
, *in_check_value_str
;
764 int bits
= (num_bits
> DEBUG_JTAG_IOZ
)
768 /* NOTE: we've lost diagnostic context here -- 'which tap' */
770 captured_str
= buf_to_str(captured
, bits
, 16);
771 in_check_value_str
= buf_to_str(in_check_value
, bits
, 16);
773 LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
775 LOG_WARNING(" check_value: 0x%s", in_check_value_str
);
778 free(in_check_value_str
);
781 char *in_check_mask_str
;
783 in_check_mask_str
= buf_to_str(in_check_mask
, bits
, 16);
784 LOG_WARNING(" check_mask: 0x%s", in_check_mask_str
);
785 free(in_check_mask_str
);
788 retval
= ERROR_JTAG_QUEUE_FAILED
;
793 void jtag_check_value_mask(struct scan_field
*field
, uint8_t *value
, uint8_t *mask
)
795 assert(field
->in_value
!= NULL
);
799 /* no checking to do */
803 jtag_execute_queue_noclear();
805 int retval
= jtag_check_value_inner(field
->in_value
, value
, mask
, field
->num_bits
);
806 jtag_set_error(retval
);
811 int default_interface_jtag_execute_queue(void)
815 LOG_ERROR("No JTAG interface configured yet. "
816 "Issue 'init' command in startup scripts "
817 "before communicating with targets.");
821 return jtag
->execute_queue();
824 void jtag_execute_queue_noclear(void)
826 jtag_flush_queue_count
++;
827 jtag_set_error(interface_jtag_execute_queue());
830 int jtag_get_flush_queue_count(void)
832 return jtag_flush_queue_count
;
835 int jtag_execute_queue(void)
837 jtag_execute_queue_noclear();
838 return jtag_error_clear();
841 static int jtag_reset_callback(enum jtag_event event
, void *priv
)
843 struct jtag_tap
*tap
= priv
;
845 if (event
== JTAG_TRST_ASSERTED
)
847 tap
->enabled
= !tap
->disabled_after_reset
;
849 /* current instruction is either BYPASS or IDCODE */
850 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
857 void jtag_sleep(uint32_t us
)
859 alive_sleep(us
/1000);
862 /* Maximum number of enabled JTAG devices we expect in the scan chain,
863 * plus one (to detect garbage at the end). Devices that don't support
864 * IDCODE take up fewer bits, possibly allowing a few more devices.
866 #define JTAG_MAX_CHAIN_SIZE 20
868 #define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
869 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
870 #define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
872 /* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
873 * know that no valid TAP will have it as an IDCODE value.
875 #define END_OF_CHAIN_FLAG 0x000000ff
877 /* a larger IR length than we ever expect to autoprobe */
878 #define JTAG_IRLEN_MAX 60
880 static int jtag_examine_chain_execute(uint8_t *idcode_buffer
, unsigned num_idcode
)
882 struct scan_field field
= {
883 .num_bits
= num_idcode
* 32,
884 .out_value
= idcode_buffer
,
885 .in_value
= idcode_buffer
,
888 // initialize to the end of chain ID value
889 for (unsigned i
= 0; i
< JTAG_MAX_CHAIN_SIZE
; i
++)
890 buf_set_u32(idcode_buffer
, i
* 32, 32, END_OF_CHAIN_FLAG
);
892 jtag_add_plain_dr_scan(field
.num_bits
, field
.out_value
, field
.in_value
, TAP_DRPAUSE
);
894 return jtag_execute_queue();
897 static bool jtag_examine_chain_check(uint8_t *idcodes
, unsigned count
)
899 uint8_t zero_check
= 0x0;
900 uint8_t one_check
= 0xff;
902 for (unsigned i
= 0; i
< count
* 4; i
++)
904 zero_check
|= idcodes
[i
];
905 one_check
&= idcodes
[i
];
908 /* if there wasn't a single non-zero bit or if all bits were one,
909 * the scan is not valid. We wrote a mix of both values; either
911 * - There's a hardware issue (almost certainly):
912 * + all-zeroes can mean a target stuck in JTAG reset
913 * + all-ones tends to mean no target
914 * - The scan chain is WAY longer than we can handle, *AND* either
915 * + there are several hundreds of TAPs in bypass, or
916 * + at least a few dozen TAPs all have an all-ones IDCODE
918 if (zero_check
== 0x00 || one_check
== 0xff)
920 LOG_ERROR("JTAG scan chain interrogation failed: all %s",
921 (zero_check
== 0x00) ? "zeroes" : "ones");
922 LOG_ERROR("Check JTAG interface, timings, target power, etc.");
928 static void jtag_examine_chain_display(enum log_levels level
, const char *msg
,
929 const char *name
, uint32_t idcode
)
931 log_printf_lf(level
, __FILE__
, __LINE__
, __FUNCTION__
,
932 "JTAG tap: %s %16.16s: 0x%08x "
933 "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
935 (unsigned int)idcode
,
936 (unsigned int)EXTRACT_MFG(idcode
),
937 (unsigned int)EXTRACT_PART(idcode
),
938 (unsigned int)EXTRACT_VER(idcode
));
941 static bool jtag_idcode_is_final(uint32_t idcode
)
944 * Some devices, such as AVR8, will output all 1's instead
945 * of TDI input value at end of chain. Allow those values
946 * instead of failing.
948 return idcode
== END_OF_CHAIN_FLAG
|| idcode
== 0xFFFFFFFF;
952 * This helper checks that remaining bits in the examined chain data are
953 * all as expected, but a single JTAG device requires only 64 bits to be
954 * read back correctly. This can help identify and diagnose problems
955 * with the JTAG chain earlier, gives more helpful/explicit error messages.
956 * Returns TRUE iff garbage was found.
958 static bool jtag_examine_chain_end(uint8_t *idcodes
, unsigned count
, unsigned max
)
960 bool triggered
= false;
961 for (; count
< max
- 31; count
+= 32)
963 uint32_t idcode
= buf_get_u32(idcodes
, count
, 32);
965 /* do not trigger the warning if the data looks good */
966 if (jtag_idcode_is_final(idcode
))
968 LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
969 count
, (unsigned int)idcode
);
975 static bool jtag_examine_chain_match_tap(const struct jtag_tap
*tap
)
977 uint32_t idcode
= tap
->idcode
;
979 /* ignore expected BYPASS codes; warn otherwise */
980 if (0 == tap
->expected_ids_cnt
&& !idcode
)
983 /* optionally ignore the JTAG version field */
984 uint32_t mask
= tap
->ignore_version
? ~(0xff << 24) : ~0;
988 /* Loop over the expected identification codes and test for a match */
989 unsigned ii
, limit
= tap
->expected_ids_cnt
;
991 for (ii
= 0; ii
< limit
; ii
++)
993 uint32_t expected
= tap
->expected_ids
[ii
] & mask
;
995 if (idcode
== expected
)
998 /* treat "-expected-id 0" as a "don't-warn" wildcard */
999 if (0 == tap
->expected_ids
[ii
])
1003 /* If none of the expected ids matched, warn */
1004 jtag_examine_chain_display(LOG_LVL_WARNING
, "UNEXPECTED",
1005 tap
->dotted_name
, tap
->idcode
);
1006 for (ii
= 0; ii
< limit
; ii
++)
1010 snprintf(msg
, sizeof(msg
), "expected %u of %u", ii
+ 1, limit
);
1011 jtag_examine_chain_display(LOG_LVL_ERROR
, msg
,
1012 tap
->dotted_name
, tap
->expected_ids
[ii
]);
1017 /* Try to examine chain layout according to IEEE 1149.1 §12
1018 * This is called a "blind interrogation" of the scan chain.
1020 static int jtag_examine_chain(void)
1022 uint8_t idcode_buffer
[JTAG_MAX_CHAIN_SIZE
* 4];
1026 bool autoprobe
= false;
1028 /* DR scan to collect BYPASS or IDCODE register contents.
1029 * Then make sure the scan data has both ones and zeroes.
1031 LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
1032 retval
= jtag_examine_chain_execute(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
);
1033 if (retval
!= ERROR_OK
)
1035 if (!jtag_examine_chain_check(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
))
1036 return ERROR_JTAG_INIT_FAILED
;
1038 /* point at the 1st tap */
1039 struct jtag_tap
*tap
= jtag_tap_next_enabled(NULL
);
1045 tap
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31;
1046 tap
= jtag_tap_next_enabled(tap
))
1048 uint32_t idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1050 if ((idcode
& 1) == 0)
1052 /* Zero for LSB indicates a device in bypass */
1053 LOG_INFO("TAP %s does not have IDCODE",
1056 tap
->hasidcode
= false;
1062 /* Friendly devices support IDCODE */
1063 tap
->hasidcode
= true;
1064 jtag_examine_chain_display(LOG_LVL_INFO
,
1066 tap
->dotted_name
, idcode
);
1070 tap
->idcode
= idcode
;
1072 /* ensure the TAP ID matches what was expected */
1073 if (!jtag_examine_chain_match_tap(tap
))
1074 retval
= ERROR_JTAG_INIT_SOFT_FAIL
;
1077 /* Fail if too many TAPs were enabled for us to verify them all. */
1079 LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
1081 return ERROR_JTAG_INIT_FAILED
;
1084 /* if autoprobing, the tap list is still empty ... populate it! */
1085 while (autoprobe
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31) {
1089 /* Is there another TAP? */
1090 idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1091 if (jtag_idcode_is_final(idcode
))
1094 /* Default everything in this TAP except IR length.
1096 * REVISIT create a jtag_alloc(chip, tap) routine, and
1097 * share it with jim_newtap_cmd().
1099 tap
= calloc(1, sizeof *tap
);
1103 sprintf(buf
, "auto%d", tapcount
++);
1104 tap
->chip
= strdup(buf
);
1105 tap
->tapname
= strdup("tap");
1107 sprintf(buf
, "%s.%s", tap
->chip
, tap
->tapname
);
1108 tap
->dotted_name
= strdup(buf
);
1110 /* tap->ir_length == 0 ... signifying irlen autoprobe */
1111 tap
->ir_capture_mask
= 0x03;
1112 tap
->ir_capture_value
= 0x01;
1114 tap
->enabled
= true;
1116 if ((idcode
& 1) == 0) {
1118 tap
->hasidcode
= false;
1121 tap
->hasidcode
= true;
1122 tap
->idcode
= idcode
;
1124 tap
->expected_ids_cnt
= 1;
1125 tap
->expected_ids
= malloc(sizeof(uint32_t));
1126 tap
->expected_ids
[0] = idcode
;
1129 LOG_WARNING("AUTO %s - use \"jtag newtap "
1130 "%s %s -expected-id 0x%8.8" PRIx32
" ...\"",
1131 tap
->dotted_name
, tap
->chip
, tap
->tapname
,
1137 /* After those IDCODE or BYPASS register values should be
1138 * only the data we fed into the scan chain.
1140 if (jtag_examine_chain_end(idcode_buffer
, bit_count
,
1141 8 * sizeof(idcode_buffer
))) {
1142 LOG_ERROR("double-check your JTAG setup (interface, "
1143 "speed, missing TAPs, ...)");
1144 return ERROR_JTAG_INIT_FAILED
;
1147 /* Return success or, for backwards compatibility if only
1148 * some IDCODE values mismatched, a soft/continuable fault.
1154 * Validate the date loaded by entry to the Capture-IR state, to help
1155 * find errors related to scan chain configuration (wrong IR lengths)
1158 * Entry state can be anything. On non-error exit, all TAPs are in
1159 * bypass mode. On error exits, the scan chain is reset.
1161 static int jtag_validate_ircapture(void)
1163 struct jtag_tap
*tap
;
1164 int total_ir_length
= 0;
1165 uint8_t *ir_test
= NULL
;
1166 struct scan_field field
;
1171 /* when autoprobing, accomodate huge IR lengths */
1172 for (tap
= NULL
, total_ir_length
= 0;
1173 (tap
= jtag_tap_next_enabled(tap
)) != NULL
;
1174 total_ir_length
+= tap
->ir_length
) {
1175 if (tap
->ir_length
== 0)
1176 total_ir_length
+= JTAG_IRLEN_MAX
;
1179 /* increase length to add 2 bit sentinel after scan */
1180 total_ir_length
+= 2;
1182 ir_test
= malloc(DIV_ROUND_UP(total_ir_length
, 8));
1183 if (ir_test
== NULL
)
1186 /* after this scan, all TAPs will capture BYPASS instructions */
1187 buf_set_ones(ir_test
, total_ir_length
);
1189 field
.num_bits
= total_ir_length
;
1190 field
.out_value
= ir_test
;
1191 field
.in_value
= ir_test
;
1193 jtag_add_plain_ir_scan(field
.num_bits
, field
.out_value
, field
.in_value
, TAP_IDLE
);
1195 LOG_DEBUG("IR capture validation scan");
1196 retval
= jtag_execute_queue();
1197 if (retval
!= ERROR_OK
)
1204 tap
= jtag_tap_next_enabled(tap
);
1209 /* If we're autoprobing, guess IR lengths. They must be at
1210 * least two bits. Guessing will fail if (a) any TAP does
1211 * not conform to the JTAG spec; or (b) when the upper bits
1212 * captured from some conforming TAP are nonzero. Or if
1213 * (c) an IR length is longer than 32 bits -- which is only
1214 * an implementation limit, which could someday be raised.
1216 * REVISIT optimization: if there's a *single* TAP we can
1217 * lift restrictions (a) and (b) by scanning a recognizable
1218 * pattern before the all-ones BYPASS. Check for where the
1219 * pattern starts in the result, instead of an 0...01 value.
1221 * REVISIT alternative approach: escape to some tcl code
1222 * which could provide more knowledge, based on IDCODE; and
1223 * only guess when that has no success.
1225 if (tap
->ir_length
== 0) {
1227 while ((val
= buf_get_u32(ir_test
, chain_pos
,
1228 tap
->ir_length
+ 1)) == 1
1229 && tap
->ir_length
<= 32) {
1232 LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
1233 jtag_tap_name(tap
), tap
->ir_length
);
1236 /* Validate the two LSBs, which must be 01 per JTAG spec.
1238 * Or ... more bits could be provided by TAP declaration.
1239 * Plus, some taps (notably in i.MX series chips) violate
1240 * this part of the JTAG spec, so their capture mask/value
1241 * attributes might disable this test.
1243 val
= buf_get_u32(ir_test
, chain_pos
, tap
->ir_length
);
1244 if ((val
& tap
->ir_capture_mask
) != tap
->ir_capture_value
) {
1245 LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x%0*x",
1247 (tap
->ir_length
+ 7) / tap
->ir_length
,
1249 (tap
->ir_length
+ 7) / tap
->ir_length
,
1250 (unsigned) tap
->ir_capture_value
);
1252 retval
= ERROR_JTAG_INIT_FAILED
;
1255 LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap
),
1256 (tap
->ir_length
+ 7) / tap
->ir_length
, val
);
1257 chain_pos
+= tap
->ir_length
;
1260 /* verify the '11' sentinel we wrote is returned at the end */
1261 val
= buf_get_u32(ir_test
, chain_pos
, 2);
1264 char *cbuf
= buf_to_str(ir_test
, total_ir_length
, 16);
1266 LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
1269 retval
= ERROR_JTAG_INIT_FAILED
;
1274 if (retval
!= ERROR_OK
) {
1276 jtag_execute_queue();
1282 void jtag_tap_init(struct jtag_tap
*tap
)
1284 unsigned ir_len_bits
;
1285 unsigned ir_len_bytes
;
1287 /* if we're autoprobing, cope with potentially huge ir_length */
1288 ir_len_bits
= tap
->ir_length
? : JTAG_IRLEN_MAX
;
1289 ir_len_bytes
= DIV_ROUND_UP(ir_len_bits
, 8);
1291 tap
->expected
= calloc(1, ir_len_bytes
);
1292 tap
->expected_mask
= calloc(1, ir_len_bytes
);
1293 tap
->cur_instr
= malloc(ir_len_bytes
);
1295 /// @todo cope better with ir_length bigger than 32 bits
1296 if (ir_len_bits
> 32)
1299 buf_set_u32(tap
->expected
, 0, ir_len_bits
, tap
->ir_capture_value
);
1300 buf_set_u32(tap
->expected_mask
, 0, ir_len_bits
, tap
->ir_capture_mask
);
1302 // TAP will be in bypass mode after jtag_validate_ircapture()
1304 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
1306 // register the reset callback for the TAP
1307 jtag_register_event_callback(&jtag_reset_callback
, tap
);
1309 LOG_DEBUG("Created Tap: %s @ abs position %d, "
1310 "irlen %d, capture: 0x%x mask: 0x%x", tap
->dotted_name
,
1311 tap
->abs_chain_position
, tap
->ir_length
,
1312 (unsigned) tap
->ir_capture_value
,
1313 (unsigned) tap
->ir_capture_mask
);
1317 void jtag_tap_free(struct jtag_tap
*tap
)
1319 jtag_unregister_event_callback(&jtag_reset_callback
, tap
);
1321 /// @todo is anything missing? no memory leaks please
1322 free((void *)tap
->expected
);
1323 free((void *)tap
->expected_ids
);
1324 free((void *)tap
->chip
);
1325 free((void *)tap
->tapname
);
1326 free((void *)tap
->dotted_name
);
1331 * Do low-level setup like initializing registers, output signals,
1334 int adapter_init(struct command_context
*cmd_ctx
)
1339 if (!jtag_interface
)
1341 /* nothing was previously specified by "interface" command */
1342 LOG_ERROR("Debug Adapter has to be specified, "
1343 "see \"interface\" command");
1344 return ERROR_JTAG_INVALID_INTERFACE
;
1347 jtag
= jtag_interface
;
1348 if (jtag_interface
->init() != ERROR_OK
)
1351 return ERROR_JTAG_INIT_FAILED
;
1354 int requested_khz
= jtag_get_speed_khz();
1355 int actual_khz
= requested_khz
;
1356 int retval
= jtag_get_speed_readable(&actual_khz
);
1357 if (ERROR_OK
!= retval
)
1358 LOG_INFO("adapter-specific clock speed value %d", jtag_get_speed());
1359 else if (actual_khz
)
1361 /* Adaptive clocking -- JTAG-specific */
1362 if ((CLOCK_MODE_RCLK
== clock_mode
)
1363 || ((CLOCK_MODE_KHZ
== clock_mode
) && !requested_khz
))
1365 LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
1369 LOG_INFO("clock speed %d kHz", actual_khz
);
1372 LOG_INFO("RCLK (adaptive clock speed)");
1377 int jtag_init_inner(struct command_context
*cmd_ctx
)
1379 struct jtag_tap
*tap
;
1381 bool issue_setup
= true;
1383 LOG_DEBUG("Init JTAG chain");
1385 tap
= jtag_tap_next_enabled(NULL
);
1387 /* Once JTAG itself is properly set up, and the scan chain
1388 * isn't absurdly large, IDCODE autoprobe should work fine.
1390 * But ... IRLEN autoprobe can fail even on systems which
1391 * are fully conformant to JTAG. Also, JTAG setup can be
1392 * quite finicky on some systems.
1394 * REVISIT: if TAP autoprobe works OK, then in many cases
1395 * we could escape to tcl code and set up targets based on
1396 * the TAP's IDCODE values.
1398 LOG_WARNING("There are no enabled taps. "
1399 "AUTO PROBING MIGHT NOT WORK!!");
1401 /* REVISIT default clock will often be too fast ... */
1405 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1408 /* Examine DR values first. This discovers problems which will
1409 * prevent communication ... hardware issues like TDO stuck, or
1410 * configuring the wrong number of (enabled) TAPs.
1412 retval
= jtag_examine_chain();
1415 /* complete success */
1417 case ERROR_JTAG_INIT_SOFT_FAIL
:
1418 /* For backward compatibility reasons, try coping with
1419 * configuration errors involving only ID mismatches.
1420 * We might be able to talk to the devices.
1422 LOG_ERROR("Trying to use configured scan chain anyway...");
1423 issue_setup
= false;
1426 /* some hard error; already issued diagnostics */
1430 /* Now look at IR values. Problems here will prevent real
1431 * communication. They mostly mean that the IR length is
1432 * wrong ... or that the IR capture value is wrong. (The
1433 * latter is uncommon, but easily worked around: provide
1434 * ircapture/irmask values during TAP setup.)
1436 retval
= jtag_validate_ircapture();
1437 if (retval
!= ERROR_OK
)
1441 jtag_notify_event(JTAG_TAP_EVENT_SETUP
);
1443 LOG_WARNING("Bypassing JTAG setup events due to errors");
1449 int adapter_quit(void)
1451 if (!jtag
|| !jtag
->quit
)
1454 // close the JTAG interface
1455 int result
= jtag
->quit();
1456 if (ERROR_OK
!= result
)
1457 LOG_ERROR("failed: %d", result
);
1463 int jtag_init_reset(struct command_context
*cmd_ctx
)
1467 if ((retval
= adapter_init(cmd_ctx
)) != ERROR_OK
)
1470 LOG_DEBUG("Initializing with hard TRST+SRST reset");
1473 * This procedure is used by default when OpenOCD triggers a reset.
1474 * It's now done through an overridable Tcl "init_reset" wrapper.
1476 * This started out as a more powerful "get JTAG working" reset than
1477 * jtag_init_inner(), applying TRST because some chips won't activate
1478 * JTAG without a TRST cycle (presumed to be async, though some of
1479 * those chips synchronize JTAG activation using TCK).
1481 * But some chips only activate JTAG as part of an SRST cycle; SRST
1482 * got mixed in. So it became a hard reset routine, which got used
1483 * in more places, and which coped with JTAG reset being forced as
1484 * part of SRST (srst_pulls_trst).
1486 * And even more corner cases started to surface: TRST and/or SRST
1487 * assertion timings matter; some chips need other JTAG operations;
1488 * TRST/SRST sequences can need to be different from these, etc.
1490 * Systems should override that wrapper to support system-specific
1491 * requirements that this not-fully-generic code doesn't handle.
1493 * REVISIT once Tcl code can read the reset_config modes, this won't
1494 * need to be a C routine at all...
1496 jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
1497 if (jtag_reset_config
& RESET_HAS_SRST
)
1499 jtag_add_reset(1, 1);
1500 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) == 0)
1501 jtag_add_reset(0, 1);
1503 jtag_add_reset(0, 0);
1504 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1507 /* Check that we can communication on the JTAG chain + eventually we want to
1508 * be able to perform enumeration only after OpenOCD has started
1509 * telnet and GDB server
1511 * That would allow users to more easily perform any magic they need to before
1514 return jtag_init_inner(cmd_ctx
);
1517 int jtag_init(struct command_context
*cmd_ctx
)
1521 if ((retval
= adapter_init(cmd_ctx
)) != ERROR_OK
)
1524 /* guard against oddball hardware: force resets to be inactive */
1525 jtag_add_reset(0, 0);
1526 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1529 if (Jim_Eval_Named(cmd_ctx
->interp
, "jtag_init", __FILE__
, __LINE__
) != JIM_OK
)
1535 unsigned jtag_get_speed_khz(void)
1540 static int adapter_khz_to_speed(unsigned khz
, int* speed
)
1542 LOG_DEBUG("convert khz to interface specific speed value");
1546 LOG_DEBUG("have interface set up");
1548 int retval
= jtag
->khz(jtag_get_speed_khz(), &speed_div1
);
1549 if (ERROR_OK
!= retval
)
1553 *speed
= speed_div1
;
1558 static int jtag_rclk_to_speed(unsigned fallback_speed_khz
, int* speed
)
1560 int retval
= adapter_khz_to_speed(0, speed
);
1561 if ((ERROR_OK
!= retval
) && fallback_speed_khz
)
1563 LOG_DEBUG("trying fallback speed...");
1564 retval
= adapter_khz_to_speed(fallback_speed_khz
, speed
);
1569 static int jtag_set_speed(int speed
)
1572 /* this command can be called during CONFIG,
1573 * in which case jtag isn't initialized */
1574 return jtag
? jtag
->speed(speed
) : ERROR_OK
;
1577 int jtag_config_khz(unsigned khz
)
1579 LOG_DEBUG("handle jtag khz");
1580 clock_mode
= CLOCK_MODE_KHZ
;
1582 int retval
= adapter_khz_to_speed(khz
, &speed
);
1583 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1586 int jtag_config_rclk(unsigned fallback_speed_khz
)
1588 LOG_DEBUG("handle jtag rclk");
1589 clock_mode
= CLOCK_MODE_RCLK
;
1590 rclk_fallback_speed_khz
= fallback_speed_khz
;
1592 int retval
= jtag_rclk_to_speed(fallback_speed_khz
, &speed
);
1593 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1596 int jtag_get_speed(void)
1601 case CLOCK_MODE_SPEED
:
1604 case CLOCK_MODE_KHZ
:
1605 adapter_khz_to_speed(jtag_get_speed_khz(), &speed
);
1607 case CLOCK_MODE_RCLK
:
1608 jtag_rclk_to_speed(rclk_fallback_speed_khz
, &speed
);
1611 LOG_ERROR("BUG: unknown jtag clock mode");
1618 int jtag_get_speed_readable(int *khz
)
1620 return jtag
? jtag
->speed_div(jtag_get_speed(), khz
) : ERROR_OK
;
1623 void jtag_set_verify(bool enable
)
1625 jtag_verify
= enable
;
1628 bool jtag_will_verify()
1633 void jtag_set_verify_capture_ir(bool enable
)
1635 jtag_verify_capture_ir
= enable
;
1638 bool jtag_will_verify_capture_ir()
1640 return jtag_verify_capture_ir
;
1643 int jtag_power_dropout(int *dropout
)
1647 /* TODO: as the jtag interface is not valid all
1648 * we can do at the moment is exit OpenOCD */
1649 LOG_ERROR("No Valid JTAG Interface Configured.");
1652 return jtag
->power_dropout(dropout
);
1655 int jtag_srst_asserted(int *srst_asserted
)
1657 return jtag
->srst_asserted(srst_asserted
);
1660 enum reset_types
jtag_get_reset_config(void)
1662 return jtag_reset_config
;
1664 void jtag_set_reset_config(enum reset_types type
)
1666 jtag_reset_config
= type
;
1669 int jtag_get_trst(void)
1673 int jtag_get_srst(void)
1678 void jtag_set_nsrst_delay(unsigned delay
)
1680 adapter_nsrst_delay
= delay
;
1682 unsigned jtag_get_nsrst_delay(void)
1684 return adapter_nsrst_delay
;
1686 void jtag_set_ntrst_delay(unsigned delay
)
1688 jtag_ntrst_delay
= delay
;
1690 unsigned jtag_get_ntrst_delay(void)
1692 return jtag_ntrst_delay
;
1696 void jtag_set_nsrst_assert_width(unsigned delay
)
1698 adapter_nsrst_assert_width
= delay
;
1700 unsigned jtag_get_nsrst_assert_width(void)
1702 return adapter_nsrst_assert_width
;
1704 void jtag_set_ntrst_assert_width(unsigned delay
)
1706 jtag_ntrst_assert_width
= delay
;
1708 unsigned jtag_get_ntrst_assert_width(void)
1710 return jtag_ntrst_assert_width
;
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