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 num_bits
, const uint8_t *out_bits
, uint8_t *in_bits
,
394 assert(out_bits
!= NULL
);
395 assert(state
!= TAP_RESET
);
399 int retval
= interface_jtag_add_plain_ir_scan(
400 num_bits
, out_bits
, in_bits
, state
);
401 jtag_set_error(retval
);
404 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
405 uint8_t *in_check_mask
, int num_bits
);
407 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
)
409 return jtag_check_value_inner((uint8_t *)data0
, (uint8_t *)data1
, (uint8_t *)data2
, (int)data3
);
412 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
),
413 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
415 for (int i
= 0; i
< in_num_fields
; i
++)
417 struct scan_field
*field
= &in_fields
[i
];
418 field
->allocated
= 0;
420 if (field
->check_value
|| field
->in_value
)
422 interface_jtag_add_scan_check_alloc(field
);
426 jtag_add_scan(active
, in_num_fields
, in_fields
, state
);
428 for (int i
= 0; i
< in_num_fields
; i
++)
430 if ((in_fields
[i
].check_value
!= NULL
) && (in_fields
[i
].in_value
!= NULL
))
432 /* this is synchronous for a minidriver */
433 jtag_add_callback4(jtag_check_value_mask_callback
, (jtag_callback_data_t
)in_fields
[i
].in_value
,
434 (jtag_callback_data_t
)in_fields
[i
].check_value
,
435 (jtag_callback_data_t
)in_fields
[i
].check_mask
,
436 (jtag_callback_data_t
)in_fields
[i
].num_bits
);
438 if (in_fields
[i
].allocated
)
440 free(in_fields
[i
].in_value
);
442 if (in_fields
[i
].modified
)
444 in_fields
[i
].in_value
= NULL
;
449 void jtag_add_dr_scan_check(struct jtag_tap
*active
, int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
453 jtag_add_scan_check(active
, jtag_add_dr_scan
, in_num_fields
, in_fields
, state
);
456 jtag_add_dr_scan(active
, in_num_fields
, in_fields
, state
);
461 void jtag_add_dr_scan(struct jtag_tap
*active
, int in_num_fields
, const struct scan_field
*in_fields
,
464 assert(state
!= TAP_RESET
);
469 retval
= interface_jtag_add_dr_scan(active
, in_num_fields
, in_fields
, state
);
470 jtag_set_error(retval
);
473 void jtag_add_plain_dr_scan(int num_bits
, const uint8_t *out_bits
, uint8_t *in_bits
,
476 assert(out_bits
!= NULL
);
477 assert(state
!= TAP_RESET
);
482 retval
= interface_jtag_add_plain_dr_scan(num_bits
, out_bits
, in_bits
, state
);
483 jtag_set_error(retval
);
486 void jtag_add_tlr(void)
488 jtag_prelude(TAP_RESET
);
489 jtag_set_error(interface_jtag_add_tlr());
491 /* NOTE: order here matches TRST path in jtag_add_reset() */
492 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
493 jtag_notify_event(JTAG_TRST_ASSERTED
);
497 * If supported by the underlying adapter, this clocks a raw bit sequence
498 * onto TMS for switching betwen JTAG and SWD modes.
500 * DO NOT use this to bypass the integrity checks and logging provided
501 * by the jtag_add_pathmove() and jtag_add_statemove() calls.
503 * @param nbits How many bits to clock out.
504 * @param seq The bit sequence. The LSB is bit 0 of seq[0].
505 * @param state The JTAG tap state to record on completion. Use
506 * TAP_INVALID to represent being in in SWD mode.
508 * @todo Update naming conventions to stop assuming everything is JTAG.
510 int jtag_add_tms_seq(unsigned nbits
, const uint8_t *seq
, enum tap_state state
)
514 if (!(jtag
->supported
& DEBUG_CAP_TMS_SEQ
))
515 return ERROR_JTAG_NOT_IMPLEMENTED
;
518 cmd_queue_cur_state
= state
;
520 retval
= interface_add_tms_seq(nbits
, seq
, state
);
521 jtag_set_error(retval
);
525 void jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
527 tap_state_t cur_state
= cmd_queue_cur_state
;
529 /* the last state has to be a stable state */
530 if (!tap_is_state_stable(path
[num_states
- 1]))
532 LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
533 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
537 for (int i
= 0; i
< num_states
; i
++)
539 if (path
[i
] == TAP_RESET
)
541 LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
542 jtag_set_error(ERROR_JTAG_STATE_INVALID
);
546 if (tap_state_transition(cur_state
, true) != path
[i
]
547 && tap_state_transition(cur_state
, false) != path
[i
])
549 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
550 tap_state_name(cur_state
), tap_state_name(path
[i
]));
551 jtag_set_error(ERROR_JTAG_TRANSITION_INVALID
);
559 jtag_set_error(interface_jtag_add_pathmove(num_states
, path
));
560 cmd_queue_cur_state
= path
[num_states
- 1];
563 int jtag_add_statemove(tap_state_t goal_state
)
565 tap_state_t cur_state
= cmd_queue_cur_state
;
567 if (goal_state
!= cur_state
)
569 LOG_DEBUG("cur_state=%s goal_state=%s",
570 tap_state_name(cur_state
),
571 tap_state_name(goal_state
));
574 /* If goal is RESET, be paranoid and force that that transition
575 * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
577 if (goal_state
== TAP_RESET
)
579 else if (goal_state
== cur_state
)
580 /* nothing to do */ ;
582 else if (tap_is_state_stable(cur_state
) && tap_is_state_stable(goal_state
))
584 unsigned tms_bits
= tap_get_tms_path(cur_state
, goal_state
);
585 unsigned tms_count
= tap_get_tms_path_len(cur_state
, goal_state
);
586 tap_state_t moves
[8];
587 assert(tms_count
< ARRAY_SIZE(moves
));
589 for (unsigned i
= 0; i
< tms_count
; i
++, tms_bits
>>= 1)
591 bool bit
= tms_bits
& 1;
593 cur_state
= tap_state_transition(cur_state
, bit
);
594 moves
[i
] = cur_state
;
597 jtag_add_pathmove(tms_count
, moves
);
599 else if (tap_state_transition(cur_state
, true) == goal_state
600 || tap_state_transition(cur_state
, false) == goal_state
)
602 jtag_add_pathmove(1, &goal_state
);
611 void jtag_add_runtest(int num_cycles
, tap_state_t state
)
614 jtag_set_error(interface_jtag_add_runtest(num_cycles
, state
));
618 void jtag_add_clocks(int num_cycles
)
620 if (!tap_is_state_stable(cmd_queue_cur_state
))
622 LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
623 tap_state_name(cmd_queue_cur_state
));
624 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
631 jtag_set_error(interface_jtag_add_clocks(num_cycles
));
635 void jtag_add_reset(int req_tlr_or_trst
, int req_srst
)
637 int trst_with_tlr
= 0;
641 /* Without SRST, we must use target-specific JTAG operations
642 * on each target; callers should not be requesting SRST when
643 * that signal doesn't exist.
645 * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
646 * can kick in even if the JTAG adapter can't drive TRST.
649 if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
650 LOG_ERROR("BUG: can't assert SRST");
651 jtag_set_error(ERROR_FAIL
);
654 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0
655 && !req_tlr_or_trst
) {
656 LOG_ERROR("BUG: can't assert only SRST");
657 jtag_set_error(ERROR_FAIL
);
663 /* JTAG reset (entry to TAP_RESET state) can always be achieved
664 * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
665 * state first. TRST accelerates it, and bypasses those states.
667 * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
668 * can kick in even if the JTAG adapter can't drive SRST.
670 if (req_tlr_or_trst
) {
671 if (!(jtag_reset_config
& RESET_HAS_TRST
))
673 else if ((jtag_reset_config
& RESET_TRST_PULLS_SRST
) != 0
680 /* Maybe change TRST and/or SRST signal state */
681 if (jtag_srst
!= new_srst
|| jtag_trst
!= new_trst
) {
684 retval
= interface_jtag_add_reset(new_trst
, new_srst
);
685 if (retval
!= ERROR_OK
)
686 jtag_set_error(retval
);
688 retval
= jtag_execute_queue();
690 if (retval
!= ERROR_OK
) {
691 LOG_ERROR("TRST/SRST error %d", retval
);
696 /* SRST resets everything hooked up to that signal */
697 if (jtag_srst
!= new_srst
) {
698 jtag_srst
= new_srst
;
701 LOG_DEBUG("SRST line asserted");
702 if (jtag_nsrst_assert_width
)
703 jtag_add_sleep(jtag_nsrst_assert_width
* 1000);
706 LOG_DEBUG("SRST line released");
707 if (jtag_nsrst_delay
)
708 jtag_add_sleep(jtag_nsrst_delay
* 1000);
712 /* Maybe enter the JTAG TAP_RESET state ...
713 * - using only TMS, TCK, and the JTAG state machine
714 * - or else more directly, using TRST
716 * TAP_RESET should be invisible to non-debug parts of the system.
719 LOG_DEBUG("JTAG reset with TLR instead of TRST");
720 jtag_set_end_state(TAP_RESET
);
723 } else if (jtag_trst
!= new_trst
) {
724 jtag_trst
= new_trst
;
726 LOG_DEBUG("TRST line asserted");
727 tap_set_state(TAP_RESET
);
728 if (jtag_ntrst_assert_width
)
729 jtag_add_sleep(jtag_ntrst_assert_width
* 1000);
731 LOG_DEBUG("TRST line released");
732 if (jtag_ntrst_delay
)
733 jtag_add_sleep(jtag_ntrst_delay
* 1000);
735 /* We just asserted nTRST, so we're now in TAP_RESET.
736 * Inform possible listeners about this, now that
737 * JTAG instructions and data can be shifted. This
738 * sequence must match jtag_add_tlr().
740 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
741 jtag_notify_event(JTAG_TRST_ASSERTED
);
746 tap_state_t
jtag_set_end_state(tap_state_t state
)
748 if ((state
== TAP_DRSHIFT
)||(state
== TAP_IRSHIFT
))
750 LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
753 if (state
!= TAP_INVALID
)
754 cmd_queue_end_state
= state
;
755 return cmd_queue_end_state
;
758 tap_state_t
jtag_get_end_state(void)
760 return cmd_queue_end_state
;
763 void jtag_add_sleep(uint32_t us
)
765 /// @todo Here, keep_alive() appears to be a layering violation!!!
767 jtag_set_error(interface_jtag_add_sleep(us
));
770 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
771 uint8_t *in_check_mask
, int num_bits
)
773 int retval
= ERROR_OK
;
777 compare_failed
= buf_cmp_mask(captured
, in_check_value
, in_check_mask
, num_bits
);
779 compare_failed
= buf_cmp(captured
, in_check_value
, num_bits
);
781 if (compare_failed
) {
782 char *captured_str
, *in_check_value_str
;
783 int bits
= (num_bits
> DEBUG_JTAG_IOZ
)
787 /* NOTE: we've lost diagnostic context here -- 'which tap' */
789 captured_str
= buf_to_str(captured
, bits
, 16);
790 in_check_value_str
= buf_to_str(in_check_value
, bits
, 16);
792 LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
794 LOG_WARNING(" check_value: 0x%s", in_check_value_str
);
797 free(in_check_value_str
);
800 char *in_check_mask_str
;
802 in_check_mask_str
= buf_to_str(in_check_mask
, bits
, 16);
803 LOG_WARNING(" check_mask: 0x%s", in_check_mask_str
);
804 free(in_check_mask_str
);
807 retval
= ERROR_JTAG_QUEUE_FAILED
;
812 void jtag_check_value_mask(struct scan_field
*field
, uint8_t *value
, uint8_t *mask
)
814 assert(field
->in_value
!= NULL
);
818 /* no checking to do */
822 jtag_execute_queue_noclear();
824 int retval
= jtag_check_value_inner(field
->in_value
, value
, mask
, field
->num_bits
);
825 jtag_set_error(retval
);
830 int default_interface_jtag_execute_queue(void)
834 LOG_ERROR("No JTAG interface configured yet. "
835 "Issue 'init' command in startup scripts "
836 "before communicating with targets.");
840 return jtag
->execute_queue();
843 void jtag_execute_queue_noclear(void)
845 jtag_flush_queue_count
++;
846 jtag_set_error(interface_jtag_execute_queue());
849 int jtag_get_flush_queue_count(void)
851 return jtag_flush_queue_count
;
854 int jtag_execute_queue(void)
856 jtag_execute_queue_noclear();
857 return jtag_error_clear();
860 static int jtag_reset_callback(enum jtag_event event
, void *priv
)
862 struct jtag_tap
*tap
= priv
;
864 if (event
== JTAG_TRST_ASSERTED
)
866 tap
->enabled
= !tap
->disabled_after_reset
;
868 /* current instruction is either BYPASS or IDCODE */
869 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
876 void jtag_sleep(uint32_t us
)
878 alive_sleep(us
/1000);
881 /* Maximum number of enabled JTAG devices we expect in the scan chain,
882 * plus one (to detect garbage at the end). Devices that don't support
883 * IDCODE take up fewer bits, possibly allowing a few more devices.
885 #define JTAG_MAX_CHAIN_SIZE 20
887 #define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
888 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
889 #define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
891 /* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
892 * know that no valid TAP will have it as an IDCODE value.
894 #define END_OF_CHAIN_FLAG 0x000000ff
896 /* a larger IR length than we ever expect to autoprobe */
897 #define JTAG_IRLEN_MAX 60
899 static int jtag_examine_chain_execute(uint8_t *idcode_buffer
, unsigned num_idcode
)
901 struct scan_field field
= {
902 .num_bits
= num_idcode
* 32,
903 .out_value
= idcode_buffer
,
904 .in_value
= idcode_buffer
,
907 // initialize to the end of chain ID value
908 for (unsigned i
= 0; i
< JTAG_MAX_CHAIN_SIZE
; i
++)
909 buf_set_u32(idcode_buffer
, i
* 32, 32, END_OF_CHAIN_FLAG
);
911 jtag_add_plain_dr_scan(field
.num_bits
, field
.out_value
, field
.in_value
, TAP_DRPAUSE
);
913 return jtag_execute_queue();
916 static bool jtag_examine_chain_check(uint8_t *idcodes
, unsigned count
)
918 uint8_t zero_check
= 0x0;
919 uint8_t one_check
= 0xff;
921 for (unsigned i
= 0; i
< count
* 4; i
++)
923 zero_check
|= idcodes
[i
];
924 one_check
&= idcodes
[i
];
927 /* if there wasn't a single non-zero bit or if all bits were one,
928 * the scan is not valid. We wrote a mix of both values; either
930 * - There's a hardware issue (almost certainly):
931 * + all-zeroes can mean a target stuck in JTAG reset
932 * + all-ones tends to mean no target
933 * - The scan chain is WAY longer than we can handle, *AND* either
934 * + there are several hundreds of TAPs in bypass, or
935 * + at least a few dozen TAPs all have an all-ones IDCODE
937 if (zero_check
== 0x00 || one_check
== 0xff)
939 LOG_ERROR("JTAG scan chain interrogation failed: all %s",
940 (zero_check
== 0x00) ? "zeroes" : "ones");
941 LOG_ERROR("Check JTAG interface, timings, target power, etc.");
947 static void jtag_examine_chain_display(enum log_levels level
, const char *msg
,
948 const char *name
, uint32_t idcode
)
950 log_printf_lf(level
, __FILE__
, __LINE__
, __FUNCTION__
,
951 "JTAG tap: %s %16.16s: 0x%08x "
952 "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
954 (unsigned int)idcode
,
955 (unsigned int)EXTRACT_MFG(idcode
),
956 (unsigned int)EXTRACT_PART(idcode
),
957 (unsigned int)EXTRACT_VER(idcode
));
960 static bool jtag_idcode_is_final(uint32_t idcode
)
963 * Some devices, such as AVR8, will output all 1's instead
964 * of TDI input value at end of chain. Allow those values
965 * instead of failing.
967 return idcode
== END_OF_CHAIN_FLAG
|| idcode
== 0xFFFFFFFF;
971 * This helper checks that remaining bits in the examined chain data are
972 * all as expected, but a single JTAG device requires only 64 bits to be
973 * read back correctly. This can help identify and diagnose problems
974 * with the JTAG chain earlier, gives more helpful/explicit error messages.
975 * Returns TRUE iff garbage was found.
977 static bool jtag_examine_chain_end(uint8_t *idcodes
, unsigned count
, unsigned max
)
979 bool triggered
= false;
980 for (; count
< max
- 31; count
+= 32)
982 uint32_t idcode
= buf_get_u32(idcodes
, count
, 32);
984 /* do not trigger the warning if the data looks good */
985 if (jtag_idcode_is_final(idcode
))
987 LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
988 count
, (unsigned int)idcode
);
994 static bool jtag_examine_chain_match_tap(const struct jtag_tap
*tap
)
996 uint32_t idcode
= tap
->idcode
;
998 /* ignore expected BYPASS codes; warn otherwise */
999 if (0 == tap
->expected_ids_cnt
&& !idcode
)
1002 /* optionally ignore the JTAG version field */
1003 uint32_t mask
= tap
->ignore_version
? ~(0xff << 24) : ~0;
1007 /* Loop over the expected identification codes and test for a match */
1008 unsigned ii
, limit
= tap
->expected_ids_cnt
;
1010 for (ii
= 0; ii
< limit
; ii
++)
1012 uint32_t expected
= tap
->expected_ids
[ii
] & mask
;
1014 if (idcode
== expected
)
1017 /* treat "-expected-id 0" as a "don't-warn" wildcard */
1018 if (0 == tap
->expected_ids
[ii
])
1022 /* If none of the expected ids matched, warn */
1023 jtag_examine_chain_display(LOG_LVL_WARNING
, "UNEXPECTED",
1024 tap
->dotted_name
, tap
->idcode
);
1025 for (ii
= 0; ii
< limit
; ii
++)
1029 snprintf(msg
, sizeof(msg
), "expected %u of %u", ii
+ 1, limit
);
1030 jtag_examine_chain_display(LOG_LVL_ERROR
, msg
,
1031 tap
->dotted_name
, tap
->expected_ids
[ii
]);
1036 /* Try to examine chain layout according to IEEE 1149.1 §12
1037 * This is called a "blind interrogation" of the scan chain.
1039 static int jtag_examine_chain(void)
1041 uint8_t idcode_buffer
[JTAG_MAX_CHAIN_SIZE
* 4];
1045 bool autoprobe
= false;
1047 /* DR scan to collect BYPASS or IDCODE register contents.
1048 * Then make sure the scan data has both ones and zeroes.
1050 LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
1051 retval
= jtag_examine_chain_execute(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
);
1052 if (retval
!= ERROR_OK
)
1054 if (!jtag_examine_chain_check(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
))
1055 return ERROR_JTAG_INIT_FAILED
;
1057 /* point at the 1st tap */
1058 struct jtag_tap
*tap
= jtag_tap_next_enabled(NULL
);
1064 tap
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31;
1065 tap
= jtag_tap_next_enabled(tap
))
1067 uint32_t idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1069 if ((idcode
& 1) == 0)
1071 /* Zero for LSB indicates a device in bypass */
1072 LOG_INFO("TAP %s does not have IDCODE",
1075 tap
->hasidcode
= false;
1081 /* Friendly devices support IDCODE */
1082 tap
->hasidcode
= true;
1083 jtag_examine_chain_display(LOG_LVL_INFO
,
1085 tap
->dotted_name
, idcode
);
1089 tap
->idcode
= idcode
;
1091 /* ensure the TAP ID matches what was expected */
1092 if (!jtag_examine_chain_match_tap(tap
))
1093 retval
= ERROR_JTAG_INIT_SOFT_FAIL
;
1096 /* Fail if too many TAPs were enabled for us to verify them all. */
1098 LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
1100 return ERROR_JTAG_INIT_FAILED
;
1103 /* if autoprobing, the tap list is still empty ... populate it! */
1104 while (autoprobe
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31) {
1108 /* Is there another TAP? */
1109 idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1110 if (jtag_idcode_is_final(idcode
))
1113 /* Default everything in this TAP except IR length.
1115 * REVISIT create a jtag_alloc(chip, tap) routine, and
1116 * share it with jim_newtap_cmd().
1118 tap
= calloc(1, sizeof *tap
);
1122 sprintf(buf
, "auto%d", tapcount
++);
1123 tap
->chip
= strdup(buf
);
1124 tap
->tapname
= strdup("tap");
1126 sprintf(buf
, "%s.%s", tap
->chip
, tap
->tapname
);
1127 tap
->dotted_name
= strdup(buf
);
1129 /* tap->ir_length == 0 ... signifying irlen autoprobe */
1130 tap
->ir_capture_mask
= 0x03;
1131 tap
->ir_capture_value
= 0x01;
1133 tap
->enabled
= true;
1135 if ((idcode
& 1) == 0) {
1137 tap
->hasidcode
= false;
1140 tap
->hasidcode
= true;
1141 tap
->idcode
= idcode
;
1143 tap
->expected_ids_cnt
= 1;
1144 tap
->expected_ids
= malloc(sizeof(uint32_t));
1145 tap
->expected_ids
[0] = idcode
;
1148 LOG_WARNING("AUTO %s - use \"jtag newtap "
1149 "%s %s -expected-id 0x%8.8" PRIx32
" ...\"",
1150 tap
->dotted_name
, tap
->chip
, tap
->tapname
,
1156 /* After those IDCODE or BYPASS register values should be
1157 * only the data we fed into the scan chain.
1159 if (jtag_examine_chain_end(idcode_buffer
, bit_count
,
1160 8 * sizeof(idcode_buffer
))) {
1161 LOG_ERROR("double-check your JTAG setup (interface, "
1162 "speed, missing TAPs, ...)");
1163 return ERROR_JTAG_INIT_FAILED
;
1166 /* Return success or, for backwards compatibility if only
1167 * some IDCODE values mismatched, a soft/continuable fault.
1173 * Validate the date loaded by entry to the Capture-IR state, to help
1174 * find errors related to scan chain configuration (wrong IR lengths)
1177 * Entry state can be anything. On non-error exit, all TAPs are in
1178 * bypass mode. On error exits, the scan chain is reset.
1180 static int jtag_validate_ircapture(void)
1182 struct jtag_tap
*tap
;
1183 int total_ir_length
= 0;
1184 uint8_t *ir_test
= NULL
;
1185 struct scan_field field
;
1190 /* when autoprobing, accomodate huge IR lengths */
1191 for (tap
= NULL
, total_ir_length
= 0;
1192 (tap
= jtag_tap_next_enabled(tap
)) != NULL
;
1193 total_ir_length
+= tap
->ir_length
) {
1194 if (tap
->ir_length
== 0)
1195 total_ir_length
+= JTAG_IRLEN_MAX
;
1198 /* increase length to add 2 bit sentinel after scan */
1199 total_ir_length
+= 2;
1201 ir_test
= malloc(DIV_ROUND_UP(total_ir_length
, 8));
1202 if (ir_test
== NULL
)
1205 /* after this scan, all TAPs will capture BYPASS instructions */
1206 buf_set_ones(ir_test
, total_ir_length
);
1208 field
.num_bits
= total_ir_length
;
1209 field
.out_value
= ir_test
;
1210 field
.in_value
= ir_test
;
1212 jtag_add_plain_ir_scan(field
.num_bits
, field
.out_value
, field
.in_value
, TAP_IDLE
);
1214 LOG_DEBUG("IR capture validation scan");
1215 retval
= jtag_execute_queue();
1216 if (retval
!= ERROR_OK
)
1223 tap
= jtag_tap_next_enabled(tap
);
1228 /* If we're autoprobing, guess IR lengths. They must be at
1229 * least two bits. Guessing will fail if (a) any TAP does
1230 * not conform to the JTAG spec; or (b) when the upper bits
1231 * captured from some conforming TAP are nonzero. Or if
1232 * (c) an IR length is longer than 32 bits -- which is only
1233 * an implementation limit, which could someday be raised.
1235 * REVISIT optimization: if there's a *single* TAP we can
1236 * lift restrictions (a) and (b) by scanning a recognizable
1237 * pattern before the all-ones BYPASS. Check for where the
1238 * pattern starts in the result, instead of an 0...01 value.
1240 * REVISIT alternative approach: escape to some tcl code
1241 * which could provide more knowledge, based on IDCODE; and
1242 * only guess when that has no success.
1244 if (tap
->ir_length
== 0) {
1246 while ((val
= buf_get_u32(ir_test
, chain_pos
,
1247 tap
->ir_length
+ 1)) == 1
1248 && tap
->ir_length
<= 32) {
1251 LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
1252 jtag_tap_name(tap
), tap
->ir_length
);
1255 /* Validate the two LSBs, which must be 01 per JTAG spec.
1257 * Or ... more bits could be provided by TAP declaration.
1258 * Plus, some taps (notably in i.MX series chips) violate
1259 * this part of the JTAG spec, so their capture mask/value
1260 * attributes might disable this test.
1262 val
= buf_get_u32(ir_test
, chain_pos
, tap
->ir_length
);
1263 if ((val
& tap
->ir_capture_mask
) != tap
->ir_capture_value
) {
1264 LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x%0*x",
1266 (tap
->ir_length
+ 7) / tap
->ir_length
,
1268 (tap
->ir_length
+ 7) / tap
->ir_length
,
1269 (unsigned) tap
->ir_capture_value
);
1271 retval
= ERROR_JTAG_INIT_FAILED
;
1274 LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap
),
1275 (tap
->ir_length
+ 7) / tap
->ir_length
, val
);
1276 chain_pos
+= tap
->ir_length
;
1279 /* verify the '11' sentinel we wrote is returned at the end */
1280 val
= buf_get_u32(ir_test
, chain_pos
, 2);
1283 char *cbuf
= buf_to_str(ir_test
, total_ir_length
, 16);
1285 LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
1288 retval
= ERROR_JTAG_INIT_FAILED
;
1293 if (retval
!= ERROR_OK
) {
1295 jtag_execute_queue();
1301 void jtag_tap_init(struct jtag_tap
*tap
)
1303 unsigned ir_len_bits
;
1304 unsigned ir_len_bytes
;
1306 /* if we're autoprobing, cope with potentially huge ir_length */
1307 ir_len_bits
= tap
->ir_length
? : JTAG_IRLEN_MAX
;
1308 ir_len_bytes
= DIV_ROUND_UP(ir_len_bits
, 8);
1310 tap
->expected
= calloc(1, ir_len_bytes
);
1311 tap
->expected_mask
= calloc(1, ir_len_bytes
);
1312 tap
->cur_instr
= malloc(ir_len_bytes
);
1314 /// @todo cope better with ir_length bigger than 32 bits
1315 if (ir_len_bits
> 32)
1318 buf_set_u32(tap
->expected
, 0, ir_len_bits
, tap
->ir_capture_value
);
1319 buf_set_u32(tap
->expected_mask
, 0, ir_len_bits
, tap
->ir_capture_mask
);
1321 // TAP will be in bypass mode after jtag_validate_ircapture()
1323 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
1325 // register the reset callback for the TAP
1326 jtag_register_event_callback(&jtag_reset_callback
, tap
);
1328 LOG_DEBUG("Created Tap: %s @ abs position %d, "
1329 "irlen %d, capture: 0x%x mask: 0x%x", tap
->dotted_name
,
1330 tap
->abs_chain_position
, tap
->ir_length
,
1331 (unsigned) tap
->ir_capture_value
,
1332 (unsigned) tap
->ir_capture_mask
);
1336 void jtag_tap_free(struct jtag_tap
*tap
)
1338 jtag_unregister_event_callback(&jtag_reset_callback
, tap
);
1340 /// @todo is anything missing? no memory leaks please
1341 free((void *)tap
->expected
);
1342 free((void *)tap
->expected_ids
);
1343 free((void *)tap
->chip
);
1344 free((void *)tap
->tapname
);
1345 free((void *)tap
->dotted_name
);
1349 int jtag_interface_init(struct command_context
*cmd_ctx
)
1354 if (!jtag_interface
)
1356 /* nothing was previously specified by "interface" command */
1357 LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
1358 return ERROR_JTAG_INVALID_INTERFACE
;
1361 jtag
= jtag_interface
;
1362 if (jtag_interface
->init() != ERROR_OK
)
1365 return ERROR_JTAG_INIT_FAILED
;
1368 int requested_khz
= jtag_get_speed_khz();
1369 int actual_khz
= requested_khz
;
1370 int retval
= jtag_get_speed_readable(&actual_khz
);
1371 if (ERROR_OK
!= retval
)
1372 LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
1373 else if (actual_khz
)
1375 if ((CLOCK_MODE_RCLK
== clock_mode
)
1376 || ((CLOCK_MODE_KHZ
== clock_mode
) && !requested_khz
))
1378 LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
1382 LOG_INFO("clock speed %d kHz", actual_khz
);
1385 LOG_INFO("RCLK (adaptive clock speed)");
1390 int jtag_init_inner(struct command_context
*cmd_ctx
)
1392 struct jtag_tap
*tap
;
1394 bool issue_setup
= true;
1396 LOG_DEBUG("Init JTAG chain");
1398 tap
= jtag_tap_next_enabled(NULL
);
1400 /* Once JTAG itself is properly set up, and the scan chain
1401 * isn't absurdly large, IDCODE autoprobe should work fine.
1403 * But ... IRLEN autoprobe can fail even on systems which
1404 * are fully conformant to JTAG. Also, JTAG setup can be
1405 * quite finicky on some systems.
1407 * REVISIT: if TAP autoprobe works OK, then in many cases
1408 * we could escape to tcl code and set up targets based on
1409 * the TAP's IDCODE values.
1411 LOG_WARNING("There are no enabled taps. "
1412 "AUTO PROBING MIGHT NOT WORK!!");
1414 /* REVISIT default clock will often be too fast ... */
1418 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1421 /* Examine DR values first. This discovers problems which will
1422 * prevent communication ... hardware issues like TDO stuck, or
1423 * configuring the wrong number of (enabled) TAPs.
1425 retval
= jtag_examine_chain();
1428 /* complete success */
1430 case ERROR_JTAG_INIT_SOFT_FAIL
:
1431 /* For backward compatibility reasons, try coping with
1432 * configuration errors involving only ID mismatches.
1433 * We might be able to talk to the devices.
1435 LOG_ERROR("Trying to use configured scan chain anyway...");
1436 issue_setup
= false;
1439 /* some hard error; already issued diagnostics */
1443 /* Now look at IR values. Problems here will prevent real
1444 * communication. They mostly mean that the IR length is
1445 * wrong ... or that the IR capture value is wrong. (The
1446 * latter is uncommon, but easily worked around: provide
1447 * ircapture/irmask values during TAP setup.)
1449 retval
= jtag_validate_ircapture();
1450 if (retval
!= ERROR_OK
)
1454 jtag_notify_event(JTAG_TAP_EVENT_SETUP
);
1456 LOG_WARNING("Bypassing JTAG setup events due to errors");
1462 int jtag_interface_quit(void)
1464 if (!jtag
|| !jtag
->quit
)
1467 // close the JTAG interface
1468 int result
= jtag
->quit();
1469 if (ERROR_OK
!= result
)
1470 LOG_ERROR("failed: %d", result
);
1476 int jtag_init_reset(struct command_context
*cmd_ctx
)
1480 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1483 LOG_DEBUG("Initializing with hard TRST+SRST reset");
1486 * This procedure is used by default when OpenOCD triggers a reset.
1487 * It's now done through an overridable Tcl "init_reset" wrapper.
1489 * This started out as a more powerful "get JTAG working" reset than
1490 * jtag_init_inner(), applying TRST because some chips won't activate
1491 * JTAG without a TRST cycle (presumed to be async, though some of
1492 * those chips synchronize JTAG activation using TCK).
1494 * But some chips only activate JTAG as part of an SRST cycle; SRST
1495 * got mixed in. So it became a hard reset routine, which got used
1496 * in more places, and which coped with JTAG reset being forced as
1497 * part of SRST (srst_pulls_trst).
1499 * And even more corner cases started to surface: TRST and/or SRST
1500 * assertion timings matter; some chips need other JTAG operations;
1501 * TRST/SRST sequences can need to be different from these, etc.
1503 * Systems should override that wrapper to support system-specific
1504 * requirements that this not-fully-generic code doesn't handle.
1506 * REVISIT once Tcl code can read the reset_config modes, this won't
1507 * need to be a C routine at all...
1509 jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
1510 if (jtag_reset_config
& RESET_HAS_SRST
)
1512 jtag_add_reset(1, 1);
1513 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) == 0)
1514 jtag_add_reset(0, 1);
1516 jtag_add_reset(0, 0);
1517 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1520 /* Check that we can communication on the JTAG chain + eventually we want to
1521 * be able to perform enumeration only after OpenOCD has started
1522 * telnet and GDB server
1524 * That would allow users to more easily perform any magic they need to before
1527 return jtag_init_inner(cmd_ctx
);
1530 int jtag_init(struct command_context
*cmd_ctx
)
1534 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1537 /* guard against oddball hardware: force resets to be inactive */
1538 jtag_add_reset(0, 0);
1539 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1542 if (Jim_Eval_Named(cmd_ctx
->interp
, "jtag_init", __FILE__
, __LINE__
) != JIM_OK
)
1548 unsigned jtag_get_speed_khz(void)
1553 static int jtag_khz_to_speed(unsigned khz
, int* speed
)
1555 LOG_DEBUG("convert khz to interface specific speed value");
1559 LOG_DEBUG("have interface set up");
1561 int retval
= jtag
->khz(jtag_get_speed_khz(), &speed_div1
);
1562 if (ERROR_OK
!= retval
)
1566 *speed
= speed_div1
;
1571 static int jtag_rclk_to_speed(unsigned fallback_speed_khz
, int* speed
)
1573 int retval
= jtag_khz_to_speed(0, speed
);
1574 if ((ERROR_OK
!= retval
) && fallback_speed_khz
)
1576 LOG_DEBUG("trying fallback speed...");
1577 retval
= jtag_khz_to_speed(fallback_speed_khz
, speed
);
1582 static int jtag_set_speed(int speed
)
1585 /* this command can be called during CONFIG,
1586 * in which case jtag isn't initialized */
1587 return jtag
? jtag
->speed(speed
) : ERROR_OK
;
1590 int jtag_config_khz(unsigned khz
)
1592 LOG_DEBUG("handle jtag khz");
1593 clock_mode
= CLOCK_MODE_KHZ
;
1595 int retval
= jtag_khz_to_speed(khz
, &speed
);
1596 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1599 int jtag_config_rclk(unsigned fallback_speed_khz
)
1601 LOG_DEBUG("handle jtag rclk");
1602 clock_mode
= CLOCK_MODE_RCLK
;
1603 rclk_fallback_speed_khz
= fallback_speed_khz
;
1605 int retval
= jtag_rclk_to_speed(fallback_speed_khz
, &speed
);
1606 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1609 int jtag_get_speed(void)
1614 case CLOCK_MODE_SPEED
:
1617 case CLOCK_MODE_KHZ
:
1618 jtag_khz_to_speed(jtag_get_speed_khz(), &speed
);
1620 case CLOCK_MODE_RCLK
:
1621 jtag_rclk_to_speed(rclk_fallback_speed_khz
, &speed
);
1624 LOG_ERROR("BUG: unknown jtag clock mode");
1631 int jtag_get_speed_readable(int *khz
)
1633 return jtag
? jtag
->speed_div(jtag_get_speed(), khz
) : ERROR_OK
;
1636 void jtag_set_verify(bool enable
)
1638 jtag_verify
= enable
;
1641 bool jtag_will_verify()
1646 void jtag_set_verify_capture_ir(bool enable
)
1648 jtag_verify_capture_ir
= enable
;
1651 bool jtag_will_verify_capture_ir()
1653 return jtag_verify_capture_ir
;
1656 int jtag_power_dropout(int *dropout
)
1660 /* TODO: as the jtag interface is not valid all
1661 * we can do at the moment is exit OpenOCD */
1662 LOG_ERROR("No Valid JTAG Interface Configured.");
1665 return jtag
->power_dropout(dropout
);
1668 int jtag_srst_asserted(int *srst_asserted
)
1670 return jtag
->srst_asserted(srst_asserted
);
1673 enum reset_types
jtag_get_reset_config(void)
1675 return jtag_reset_config
;
1677 void jtag_set_reset_config(enum reset_types type
)
1679 jtag_reset_config
= type
;
1682 int jtag_get_trst(void)
1686 int jtag_get_srst(void)
1691 void jtag_set_nsrst_delay(unsigned delay
)
1693 jtag_nsrst_delay
= delay
;
1695 unsigned jtag_get_nsrst_delay(void)
1697 return jtag_nsrst_delay
;
1699 void jtag_set_ntrst_delay(unsigned delay
)
1701 jtag_ntrst_delay
= delay
;
1703 unsigned jtag_get_ntrst_delay(void)
1705 return jtag_ntrst_delay
;
1709 void jtag_set_nsrst_assert_width(unsigned delay
)
1711 jtag_nsrst_assert_width
= delay
;
1713 unsigned jtag_get_nsrst_assert_width(void)
1715 return jtag_nsrst_assert_width
;
1717 void jtag_set_ntrst_assert_width(unsigned delay
)
1719 jtag_ntrst_assert_width
= delay
;
1721 unsigned jtag_get_ntrst_assert_width(void)
1723 return jtag_ntrst_assert_width
;