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 "minidriver.h"
36 #include "interface.h"
43 /// The number of JTAG queue flushes (for profiling and debugging purposes).
44 static int jtag_flush_queue_count
;
46 static void jtag_add_scan_check(void (*jtag_add_scan
)(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(int in_count
, const struct scan_field
*in_fields
,
361 int retval
= interface_jtag_add_ir_scan(in_count
, in_fields
, state
);
362 jtag_set_error(retval
);
366 void jtag_add_ir_scan(int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
368 assert(state
!= TAP_RESET
);
370 if (jtag_verify
&& jtag_verify_capture_ir
)
372 /* 8 x 32 bit id's is enough for all invocations */
374 for (int j
= 0; j
< in_num_fields
; j
++)
376 /* if we are to run a verification of the ir scan, we need to get the input back.
377 * We may have to allocate space if the caller didn't ask for the input back.
379 in_fields
[j
].check_value
= in_fields
[j
].tap
->expected
;
380 in_fields
[j
].check_mask
= in_fields
[j
].tap
->expected_mask
;
382 jtag_add_scan_check(jtag_add_ir_scan_noverify
, in_num_fields
, in_fields
, state
);
385 jtag_add_ir_scan_noverify(in_num_fields
, in_fields
, state
);
389 void jtag_add_plain_ir_scan(int in_num_fields
, const struct scan_field
*in_fields
,
392 assert(state
!= TAP_RESET
);
396 int retval
= interface_jtag_add_plain_ir_scan(
397 in_num_fields
, in_fields
, state
);
398 jtag_set_error(retval
);
401 void jtag_add_callback(jtag_callback1_t f
, jtag_callback_data_t data0
)
403 interface_jtag_add_callback(f
, data0
);
406 void jtag_add_callback4(jtag_callback_t f
, jtag_callback_data_t data0
,
407 jtag_callback_data_t data1
, jtag_callback_data_t data2
,
408 jtag_callback_data_t data3
)
410 interface_jtag_add_callback4(f
, data0
, data1
, data2
, data3
);
413 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
414 uint8_t *in_check_mask
, int num_bits
);
416 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
)
418 return jtag_check_value_inner((uint8_t *)data0
, (uint8_t *)data1
, (uint8_t *)data2
, (int)data3
);
421 static void jtag_add_scan_check(void (*jtag_add_scan
)(int in_num_fields
, const struct scan_field
*in_fields
, tap_state_t state
),
422 int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
424 for (int i
= 0; i
< in_num_fields
; i
++)
426 struct scan_field
*field
= &in_fields
[i
];
427 field
->allocated
= 0;
429 if (field
->check_value
|| field
->in_value
)
431 interface_jtag_add_scan_check_alloc(field
);
435 jtag_add_scan(in_num_fields
, in_fields
, state
);
437 for (int i
= 0; i
< in_num_fields
; i
++)
439 if ((in_fields
[i
].check_value
!= NULL
) && (in_fields
[i
].in_value
!= NULL
))
441 /* this is synchronous for a minidriver */
442 jtag_add_callback4(jtag_check_value_mask_callback
, (jtag_callback_data_t
)in_fields
[i
].in_value
,
443 (jtag_callback_data_t
)in_fields
[i
].check_value
,
444 (jtag_callback_data_t
)in_fields
[i
].check_mask
,
445 (jtag_callback_data_t
)in_fields
[i
].num_bits
);
447 if (in_fields
[i
].allocated
)
449 free(in_fields
[i
].in_value
);
451 if (in_fields
[i
].modified
)
453 in_fields
[i
].in_value
= NULL
;
458 void jtag_add_dr_scan_check(int in_num_fields
, struct scan_field
*in_fields
, tap_state_t state
)
462 jtag_add_scan_check(jtag_add_dr_scan
, in_num_fields
, in_fields
, state
);
465 jtag_add_dr_scan(in_num_fields
, in_fields
, state
);
470 void jtag_add_dr_scan(int in_num_fields
, const struct scan_field
*in_fields
,
473 assert(state
!= TAP_RESET
);
478 retval
= interface_jtag_add_dr_scan(in_num_fields
, in_fields
, state
);
479 jtag_set_error(retval
);
482 void jtag_add_plain_dr_scan(int in_num_fields
, const struct scan_field
*in_fields
,
485 assert(state
!= TAP_RESET
);
490 retval
= interface_jtag_add_plain_dr_scan(in_num_fields
, in_fields
, state
);
491 jtag_set_error(retval
);
494 void jtag_add_dr_out(struct jtag_tap
* tap
,
495 int num_fields
, const int* num_bits
, const uint32_t* value
,
496 tap_state_t end_state
)
498 assert(end_state
!= TAP_RESET
);
499 assert(end_state
!= TAP_INVALID
);
501 cmd_queue_cur_state
= end_state
;
503 interface_jtag_add_dr_out(tap
,
504 num_fields
, num_bits
, value
,
508 void jtag_add_tlr(void)
510 jtag_prelude(TAP_RESET
);
511 jtag_set_error(interface_jtag_add_tlr());
513 /* NOTE: order here matches TRST path in jtag_add_reset() */
514 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
515 jtag_notify_event(JTAG_TRST_ASSERTED
);
518 void jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
520 tap_state_t cur_state
= cmd_queue_cur_state
;
522 /* the last state has to be a stable state */
523 if (!tap_is_state_stable(path
[num_states
- 1]))
525 LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
526 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
530 for (int i
= 0; i
< num_states
; i
++)
532 if (path
[i
] == TAP_RESET
)
534 LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
535 jtag_set_error(ERROR_JTAG_STATE_INVALID
);
539 if (tap_state_transition(cur_state
, true) != path
[i
]
540 && tap_state_transition(cur_state
, false) != path
[i
])
542 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
543 tap_state_name(cur_state
), tap_state_name(path
[i
]));
544 jtag_set_error(ERROR_JTAG_TRANSITION_INVALID
);
552 jtag_set_error(interface_jtag_add_pathmove(num_states
, path
));
553 cmd_queue_cur_state
= path
[num_states
- 1];
556 int jtag_add_statemove(tap_state_t goal_state
)
558 tap_state_t cur_state
= cmd_queue_cur_state
;
560 LOG_DEBUG("cur_state=%s goal_state=%s",
561 tap_state_name(cur_state
),
562 tap_state_name(goal_state
));
565 /* If goal is RESET, be paranoid and force that that transition
566 * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
568 if (goal_state
== TAP_RESET
)
570 else if (goal_state
== cur_state
)
571 /* nothing to do */ ;
573 else if (tap_is_state_stable(cur_state
) && tap_is_state_stable(goal_state
))
575 unsigned tms_bits
= tap_get_tms_path(cur_state
, goal_state
);
576 unsigned tms_count
= tap_get_tms_path_len(cur_state
, goal_state
);
577 tap_state_t moves
[8];
578 assert(tms_count
< ARRAY_SIZE(moves
));
580 for (unsigned i
= 0; i
< tms_count
; i
++, tms_bits
>>= 1)
582 bool bit
= tms_bits
& 1;
584 cur_state
= tap_state_transition(cur_state
, bit
);
585 moves
[i
] = cur_state
;
588 jtag_add_pathmove(tms_count
, moves
);
590 else if (tap_state_transition(cur_state
, true) == goal_state
591 || tap_state_transition(cur_state
, false) == goal_state
)
593 jtag_add_pathmove(1, &goal_state
);
602 void jtag_add_runtest(int num_cycles
, tap_state_t state
)
605 jtag_set_error(interface_jtag_add_runtest(num_cycles
, state
));
609 void jtag_add_clocks(int num_cycles
)
611 if (!tap_is_state_stable(cmd_queue_cur_state
))
613 LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
614 tap_state_name(cmd_queue_cur_state
));
615 jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE
);
622 jtag_set_error(interface_jtag_add_clocks(num_cycles
));
626 void jtag_add_reset(int req_tlr_or_trst
, int req_srst
)
628 int trst_with_tlr
= 0;
632 /* Without SRST, we must use target-specific JTAG operations
633 * on each target; callers should not be requesting SRST when
634 * that signal doesn't exist.
636 * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
637 * can kick in even if the JTAG adapter can't drive TRST.
640 if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
641 LOG_ERROR("BUG: can't assert SRST");
642 jtag_set_error(ERROR_FAIL
);
645 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0
646 && !req_tlr_or_trst
) {
647 LOG_ERROR("BUG: can't assert only SRST");
648 jtag_set_error(ERROR_FAIL
);
654 /* JTAG reset (entry to TAP_RESET state) can always be achieved
655 * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
656 * state first. TRST accelerates it, and bypasses those states.
658 * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
659 * can kick in even if the JTAG adapter can't drive SRST.
661 if (req_tlr_or_trst
) {
662 if (!(jtag_reset_config
& RESET_HAS_TRST
))
664 else if ((jtag_reset_config
& RESET_TRST_PULLS_SRST
) != 0
671 /* Maybe change TRST and/or SRST signal state */
672 if (jtag_srst
!= new_srst
|| jtag_trst
!= new_trst
) {
675 retval
= interface_jtag_add_reset(new_trst
, new_srst
);
676 if (retval
!= ERROR_OK
)
677 jtag_set_error(retval
);
679 retval
= jtag_execute_queue();
681 if (retval
!= ERROR_OK
) {
682 LOG_ERROR("TRST/SRST error %d", retval
);
687 /* SRST resets everything hooked up to that signal */
688 if (jtag_srst
!= new_srst
) {
689 jtag_srst
= new_srst
;
692 LOG_DEBUG("SRST line asserted");
693 if (jtag_nsrst_assert_width
)
694 jtag_add_sleep(jtag_nsrst_assert_width
* 1000);
697 LOG_DEBUG("SRST line released");
698 if (jtag_nsrst_delay
)
699 jtag_add_sleep(jtag_nsrst_delay
* 1000);
703 /* Maybe enter the JTAG TAP_RESET state ...
704 * - using only TMS, TCK, and the JTAG state machine
705 * - or else more directly, using TRST
707 * TAP_RESET should be invisible to non-debug parts of the system.
710 LOG_DEBUG("JTAG reset with TLR instead of TRST");
711 jtag_set_end_state(TAP_RESET
);
714 } else if (jtag_trst
!= new_trst
) {
715 jtag_trst
= new_trst
;
717 LOG_DEBUG("TRST line asserted");
718 tap_set_state(TAP_RESET
);
719 if (jtag_ntrst_assert_width
)
720 jtag_add_sleep(jtag_ntrst_assert_width
* 1000);
722 LOG_DEBUG("TRST line released");
723 if (jtag_ntrst_delay
)
724 jtag_add_sleep(jtag_ntrst_delay
* 1000);
726 /* We just asserted nTRST, so we're now in TAP_RESET.
727 * Inform possible listeners about this, now that
728 * JTAG instructions and data can be shifted. This
729 * sequence must match jtag_add_tlr().
731 jtag_call_event_callbacks(JTAG_TRST_ASSERTED
);
732 jtag_notify_event(JTAG_TRST_ASSERTED
);
737 tap_state_t
jtag_set_end_state(tap_state_t state
)
739 if ((state
== TAP_DRSHIFT
)||(state
== TAP_IRSHIFT
))
741 LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
744 if (state
!= TAP_INVALID
)
745 cmd_queue_end_state
= state
;
746 return cmd_queue_end_state
;
749 tap_state_t
jtag_get_end_state(void)
751 return cmd_queue_end_state
;
754 void jtag_add_sleep(uint32_t us
)
756 /// @todo Here, keep_alive() appears to be a layering violation!!!
758 jtag_set_error(interface_jtag_add_sleep(us
));
761 static int jtag_check_value_inner(uint8_t *captured
, uint8_t *in_check_value
,
762 uint8_t *in_check_mask
, int num_bits
)
764 int retval
= ERROR_OK
;
768 compare_failed
= buf_cmp_mask(captured
, in_check_value
, in_check_mask
, num_bits
);
770 compare_failed
= buf_cmp(captured
, in_check_value
, num_bits
);
772 if (compare_failed
) {
773 char *captured_str
, *in_check_value_str
;
774 int bits
= (num_bits
> DEBUG_JTAG_IOZ
)
778 /* NOTE: we've lost diagnostic context here -- 'which tap' */
780 captured_str
= buf_to_str(captured
, bits
, 16);
781 in_check_value_str
= buf_to_str(in_check_value
, bits
, 16);
783 LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
785 LOG_WARNING(" check_value: 0x%s", in_check_value_str
);
788 free(in_check_value_str
);
791 char *in_check_mask_str
;
793 in_check_mask_str
= buf_to_str(in_check_mask
, bits
, 16);
794 LOG_WARNING(" check_mask: 0x%s", in_check_mask_str
);
795 free(in_check_mask_str
);
798 retval
= ERROR_JTAG_QUEUE_FAILED
;
803 void jtag_check_value_mask(struct scan_field
*field
, uint8_t *value
, uint8_t *mask
)
805 assert(field
->in_value
!= NULL
);
809 /* no checking to do */
813 jtag_execute_queue_noclear();
815 int retval
= jtag_check_value_inner(field
->in_value
, value
, mask
, field
->num_bits
);
816 jtag_set_error(retval
);
821 int default_interface_jtag_execute_queue(void)
825 LOG_ERROR("No JTAG interface configured yet. "
826 "Issue 'init' command in startup scripts "
827 "before communicating with targets.");
831 return jtag
->execute_queue();
834 void jtag_execute_queue_noclear(void)
836 jtag_flush_queue_count
++;
837 jtag_set_error(interface_jtag_execute_queue());
840 int jtag_get_flush_queue_count(void)
842 return jtag_flush_queue_count
;
845 int jtag_execute_queue(void)
847 jtag_execute_queue_noclear();
848 return jtag_error_clear();
851 static int jtag_reset_callback(enum jtag_event event
, void *priv
)
853 struct jtag_tap
*tap
= priv
;
855 if (event
== JTAG_TRST_ASSERTED
)
857 tap
->enabled
= !tap
->disabled_after_reset
;
859 /* current instruction is either BYPASS or IDCODE */
860 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
867 void jtag_sleep(uint32_t us
)
869 alive_sleep(us
/1000);
872 /* Maximum number of enabled JTAG devices we expect in the scan chain,
873 * plus one (to detect garbage at the end). Devices that don't support
874 * IDCODE take up fewer bits, possibly allowing a few more devices.
876 #define JTAG_MAX_CHAIN_SIZE 20
878 #define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
879 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
880 #define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
882 /* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
883 * know that no valid TAP will have it as an IDCODE value.
885 #define END_OF_CHAIN_FLAG 0x000000ff
887 /* a larger IR length than we ever expect to autoprobe */
888 #define JTAG_IRLEN_MAX 60
890 static int jtag_examine_chain_execute(uint8_t *idcode_buffer
, unsigned num_idcode
)
892 struct scan_field field
= {
894 .num_bits
= num_idcode
* 32,
895 .out_value
= idcode_buffer
,
896 .in_value
= idcode_buffer
,
899 // initialize to the end of chain ID value
900 for (unsigned i
= 0; i
< JTAG_MAX_CHAIN_SIZE
; i
++)
901 buf_set_u32(idcode_buffer
, i
* 32, 32, END_OF_CHAIN_FLAG
);
903 jtag_add_plain_dr_scan(1, &field
, TAP_DRPAUSE
);
905 return jtag_execute_queue();
908 static bool jtag_examine_chain_check(uint8_t *idcodes
, unsigned count
)
910 uint8_t zero_check
= 0x0;
911 uint8_t one_check
= 0xff;
913 for (unsigned i
= 0; i
< count
* 4; i
++)
915 zero_check
|= idcodes
[i
];
916 one_check
&= idcodes
[i
];
919 /* if there wasn't a single non-zero bit or if all bits were one,
920 * the scan is not valid. We wrote a mix of both values; either
922 * - There's a hardware issue (almost certainly):
923 * + all-zeroes can mean a target stuck in JTAG reset
924 * + all-ones tends to mean no target
925 * - The scan chain is WAY longer than we can handle, *AND* either
926 * + there are several hundreds of TAPs in bypass, or
927 * + at least a few dozen TAPs all have an all-ones IDCODE
929 if (zero_check
== 0x00 || one_check
== 0xff)
931 LOG_ERROR("JTAG scan chain interrogation failed: all %s",
932 (zero_check
== 0x00) ? "zeroes" : "ones");
933 LOG_ERROR("Check JTAG interface, timings, target power, etc.");
939 static void jtag_examine_chain_display(enum log_levels level
, const char *msg
,
940 const char *name
, uint32_t idcode
)
942 log_printf_lf(level
, __FILE__
, __LINE__
, __FUNCTION__
,
943 "JTAG tap: %s %16.16s: 0x%08x "
944 "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
946 (unsigned int)idcode
,
947 (unsigned int)EXTRACT_MFG(idcode
),
948 (unsigned int)EXTRACT_PART(idcode
),
949 (unsigned int)EXTRACT_VER(idcode
));
952 static bool jtag_idcode_is_final(uint32_t idcode
)
955 * Some devices, such as AVR8, will output all 1's instead
956 * of TDI input value at end of chain. Allow those values
957 * instead of failing.
959 return idcode
== END_OF_CHAIN_FLAG
|| idcode
== 0xFFFFFFFF;
963 * This helper checks that remaining bits in the examined chain data are
964 * all as expected, but a single JTAG device requires only 64 bits to be
965 * read back correctly. This can help identify and diagnose problems
966 * with the JTAG chain earlier, gives more helpful/explicit error messages.
967 * Returns TRUE iff garbage was found.
969 static bool jtag_examine_chain_end(uint8_t *idcodes
, unsigned count
, unsigned max
)
971 bool triggered
= false;
972 for (; count
< max
- 31; count
+= 32)
974 uint32_t idcode
= buf_get_u32(idcodes
, count
, 32);
976 /* do not trigger the warning if the data looks good */
977 if (jtag_idcode_is_final(idcode
))
979 LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
980 count
, (unsigned int)idcode
);
986 static bool jtag_examine_chain_match_tap(const struct jtag_tap
*tap
)
988 /* ignore expected BYPASS codes; warn otherwise */
989 if (0 == tap
->expected_ids_cnt
&& !tap
->idcode
)
992 /* Loop over the expected identification codes and test for a match */
993 unsigned ii
, limit
= tap
->expected_ids_cnt
;
995 for (ii
= 0; ii
< limit
; ii
++)
997 if (tap
->idcode
== tap
->expected_ids
[ii
])
1000 /* treat "-expected-id 0" as a "don't-warn" wildcard */
1001 if (0 == tap
->expected_ids
[ii
])
1005 /* If none of the expected ids matched, warn */
1006 jtag_examine_chain_display(LOG_LVL_WARNING
, "UNEXPECTED",
1007 tap
->dotted_name
, tap
->idcode
);
1008 for (ii
= 0; ii
< limit
; ii
++)
1012 snprintf(msg
, sizeof(msg
), "expected %u of %u", ii
+ 1, limit
);
1013 jtag_examine_chain_display(LOG_LVL_ERROR
, msg
,
1014 tap
->dotted_name
, tap
->expected_ids
[ii
]);
1019 /* Try to examine chain layout according to IEEE 1149.1 §12
1020 * This is called a "blind interrogation" of the scan chain.
1022 static int jtag_examine_chain(void)
1024 uint8_t idcode_buffer
[JTAG_MAX_CHAIN_SIZE
* 4];
1028 bool autoprobe
= false;
1030 /* DR scan to collect BYPASS or IDCODE register contents.
1031 * Then make sure the scan data has both ones and zeroes.
1033 LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
1034 retval
= jtag_examine_chain_execute(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
);
1035 if (retval
!= ERROR_OK
)
1037 if (!jtag_examine_chain_check(idcode_buffer
, JTAG_MAX_CHAIN_SIZE
))
1038 return ERROR_JTAG_INIT_FAILED
;
1040 /* point at the 1st tap */
1041 struct jtag_tap
*tap
= jtag_tap_next_enabled(NULL
);
1047 tap
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31;
1048 tap
= jtag_tap_next_enabled(tap
))
1050 uint32_t idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1052 if ((idcode
& 1) == 0)
1054 /* Zero for LSB indicates a device in bypass */
1055 LOG_INFO("TAP %s does not have IDCODE",
1058 tap
->hasidcode
= false;
1064 /* Friendly devices support IDCODE */
1065 tap
->hasidcode
= true;
1066 jtag_examine_chain_display(LOG_LVL_INFO
,
1068 tap
->dotted_name
, idcode
);
1072 tap
->idcode
= idcode
;
1074 /* ensure the TAP ID matches what was expected */
1075 if (!jtag_examine_chain_match_tap(tap
))
1076 retval
= ERROR_JTAG_INIT_SOFT_FAIL
;
1079 /* Fail if too many TAPs were enabled for us to verify them all. */
1081 LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
1083 return ERROR_JTAG_INIT_FAILED
;
1086 /* if autoprobing, the tap list is still empty ... populate it! */
1087 while (autoprobe
&& bit_count
< (JTAG_MAX_CHAIN_SIZE
* 32) - 31) {
1091 /* Is there another TAP? */
1092 idcode
= buf_get_u32(idcode_buffer
, bit_count
, 32);
1093 if (jtag_idcode_is_final(idcode
))
1096 /* Default everything in this TAP except IR length.
1098 * REVISIT create a jtag_alloc(chip, tap) routine, and
1099 * share it with jim_newtap_cmd().
1101 tap
= calloc(1, sizeof *tap
);
1105 sprintf(buf
, "auto%d", tapcount
++);
1106 tap
->chip
= strdup(buf
);
1107 tap
->tapname
= strdup("tap");
1109 sprintf(buf
, "%s.%s", tap
->chip
, tap
->tapname
);
1110 tap
->dotted_name
= strdup(buf
);
1112 /* tap->ir_length == 0 ... signifying irlen autoprobe */
1113 tap
->ir_capture_mask
= 0x03;
1114 tap
->ir_capture_value
= 0x01;
1116 tap
->enabled
= true;
1118 if ((idcode
& 1) == 0) {
1120 tap
->hasidcode
= false;
1123 tap
->hasidcode
= true;
1124 tap
->idcode
= idcode
;
1126 tap
->expected_ids_cnt
= 1;
1127 tap
->expected_ids
= malloc(sizeof(uint32_t));
1128 tap
->expected_ids
[0] = idcode
;
1131 LOG_WARNING("AUTO %s - use \"jtag newtap "
1132 "%s %s -expected-id 0x%8.8" PRIx32
" ...\"",
1133 tap
->dotted_name
, tap
->chip
, tap
->tapname
,
1139 /* After those IDCODE or BYPASS register values should be
1140 * only the data we fed into the scan chain.
1142 if (jtag_examine_chain_end(idcode_buffer
, bit_count
,
1143 8 * sizeof(idcode_buffer
))) {
1144 LOG_ERROR("double-check your JTAG setup (interface, "
1145 "speed, missing TAPs, ...)");
1146 return ERROR_JTAG_INIT_FAILED
;
1149 /* Return success or, for backwards compatibility if only
1150 * some IDCODE values mismatched, a soft/continuable fault.
1156 * Validate the date loaded by entry to the Capture-IR state, to help
1157 * find errors related to scan chain configuration (wrong IR lengths)
1160 * Entry state can be anything. On non-error exit, all TAPs are in
1161 * bypass mode. On error exits, the scan chain is reset.
1163 static int jtag_validate_ircapture(void)
1165 struct jtag_tap
*tap
;
1166 int total_ir_length
= 0;
1167 uint8_t *ir_test
= NULL
;
1168 struct scan_field field
;
1173 /* when autoprobing, accomodate huge IR lengths */
1174 for (tap
= NULL
, total_ir_length
= 0;
1175 (tap
= jtag_tap_next_enabled(tap
)) != NULL
;
1176 total_ir_length
+= tap
->ir_length
) {
1177 if (tap
->ir_length
== 0)
1178 total_ir_length
+= JTAG_IRLEN_MAX
;
1181 /* increase length to add 2 bit sentinel after scan */
1182 total_ir_length
+= 2;
1184 ir_test
= malloc(DIV_ROUND_UP(total_ir_length
, 8));
1185 if (ir_test
== NULL
)
1188 /* after this scan, all TAPs will capture BYPASS instructions */
1189 buf_set_ones(ir_test
, total_ir_length
);
1192 field
.num_bits
= total_ir_length
;
1193 field
.out_value
= ir_test
;
1194 field
.in_value
= ir_test
;
1196 jtag_add_plain_ir_scan(1, &field
, TAP_IDLE
);
1198 LOG_DEBUG("IR capture validation scan");
1199 retval
= jtag_execute_queue();
1200 if (retval
!= ERROR_OK
)
1207 tap
= jtag_tap_next_enabled(tap
);
1212 /* If we're autoprobing, guess IR lengths. They must be at
1213 * least two bits. Guessing will fail if (a) any TAP does
1214 * not conform to the JTAG spec; or (b) when the upper bits
1215 * captured from some conforming TAP are nonzero. Or if
1216 * (c) an IR length is longer than 32 bits -- which is only
1217 * an implementation limit, which could someday be raised.
1219 * REVISIT optimization: if there's a *single* TAP we can
1220 * lift restrictions (a) and (b) by scanning a recognizable
1221 * pattern before the all-ones BYPASS. Check for where the
1222 * pattern starts in the result, instead of an 0...01 value.
1224 * REVISIT alternative approach: escape to some tcl code
1225 * which could provide more knowledge, based on IDCODE; and
1226 * only guess when that has no success.
1228 if (tap
->ir_length
== 0) {
1230 while ((val
= buf_get_u32(ir_test
, chain_pos
,
1231 tap
->ir_length
+ 1)) == 1
1232 && tap
->ir_length
<= 32) {
1235 LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
1236 jtag_tap_name(tap
), tap
->ir_length
);
1239 /* Validate the two LSBs, which must be 01 per JTAG spec.
1241 * Or ... more bits could be provided by TAP declaration.
1242 * Plus, some taps (notably in i.MX series chips) violate
1243 * this part of the JTAG spec, so their capture mask/value
1244 * attributes might disable this test.
1246 val
= buf_get_u32(ir_test
, chain_pos
, tap
->ir_length
);
1247 if ((val
& tap
->ir_capture_mask
) != tap
->ir_capture_value
) {
1248 LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x%0*x",
1250 (tap
->ir_length
+ 7) / tap
->ir_length
,
1252 (tap
->ir_length
+ 7) / tap
->ir_length
,
1253 (unsigned) tap
->ir_capture_value
);
1255 retval
= ERROR_JTAG_INIT_FAILED
;
1258 LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap
),
1259 (tap
->ir_length
+ 7) / tap
->ir_length
, val
);
1260 chain_pos
+= tap
->ir_length
;
1263 /* verify the '11' sentinel we wrote is returned at the end */
1264 val
= buf_get_u32(ir_test
, chain_pos
, 2);
1267 char *cbuf
= buf_to_str(ir_test
, total_ir_length
, 16);
1269 LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
1272 retval
= ERROR_JTAG_INIT_FAILED
;
1277 if (retval
!= ERROR_OK
) {
1279 jtag_execute_queue();
1285 void jtag_tap_init(struct jtag_tap
*tap
)
1287 unsigned ir_len_bits
;
1288 unsigned ir_len_bytes
;
1290 /* if we're autoprobing, cope with potentially huge ir_length */
1291 ir_len_bits
= tap
->ir_length
? : JTAG_IRLEN_MAX
;
1292 ir_len_bytes
= DIV_ROUND_UP(ir_len_bits
, 8);
1294 tap
->expected
= calloc(1, ir_len_bytes
);
1295 tap
->expected_mask
= calloc(1, ir_len_bytes
);
1296 tap
->cur_instr
= malloc(ir_len_bytes
);
1298 /// @todo cope better with ir_length bigger than 32 bits
1299 if (ir_len_bits
> 32)
1302 buf_set_u32(tap
->expected
, 0, ir_len_bits
, tap
->ir_capture_value
);
1303 buf_set_u32(tap
->expected_mask
, 0, ir_len_bits
, tap
->ir_capture_mask
);
1305 // TAP will be in bypass mode after jtag_validate_ircapture()
1307 buf_set_ones(tap
->cur_instr
, tap
->ir_length
);
1309 // register the reset callback for the TAP
1310 jtag_register_event_callback(&jtag_reset_callback
, tap
);
1312 LOG_DEBUG("Created Tap: %s @ abs position %d, "
1313 "irlen %d, capture: 0x%x mask: 0x%x", tap
->dotted_name
,
1314 tap
->abs_chain_position
, tap
->ir_length
,
1315 (unsigned) tap
->ir_capture_value
,
1316 (unsigned) tap
->ir_capture_mask
);
1320 void jtag_tap_free(struct jtag_tap
*tap
)
1322 jtag_unregister_event_callback(&jtag_reset_callback
, tap
);
1324 /// @todo is anything missing? no memory leaks please
1325 free((void *)tap
->expected
);
1326 free((void *)tap
->expected_ids
);
1327 free((void *)tap
->chip
);
1328 free((void *)tap
->tapname
);
1329 free((void *)tap
->dotted_name
);
1333 int jtag_interface_init(struct command_context
*cmd_ctx
)
1338 if (!jtag_interface
)
1340 /* nothing was previously specified by "interface" command */
1341 LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
1342 return ERROR_JTAG_INVALID_INTERFACE
;
1345 jtag
= jtag_interface
;
1346 if (jtag_interface
->init() != ERROR_OK
)
1349 return ERROR_JTAG_INIT_FAILED
;
1352 int requested_khz
= jtag_get_speed_khz();
1353 int actual_khz
= requested_khz
;
1354 int retval
= jtag_get_speed_readable(&actual_khz
);
1355 if (ERROR_OK
!= retval
)
1356 LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
1357 else if (actual_khz
)
1359 if ((CLOCK_MODE_RCLK
== clock_mode
)
1360 || ((CLOCK_MODE_KHZ
== clock_mode
) && !requested_khz
))
1362 LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
1366 LOG_INFO("clock speed %d kHz", actual_khz
);
1369 LOG_INFO("RCLK (adaptive clock speed)");
1374 int jtag_init_inner(struct command_context
*cmd_ctx
)
1376 struct jtag_tap
*tap
;
1378 bool issue_setup
= true;
1380 LOG_DEBUG("Init JTAG chain");
1382 tap
= jtag_tap_next_enabled(NULL
);
1384 /* Once JTAG itself is properly set up, and the scan chain
1385 * isn't absurdly large, IDCODE autoprobe should work fine.
1387 * But ... IRLEN autoprobe can fail even on systems which
1388 * are fully conformant to JTAG. Also, JTAG setup can be
1389 * quite finicky on some systems.
1391 * REVISIT: if TAP autoprobe works OK, then in many cases
1392 * we could escape to tcl code and set up targets based on
1393 * the TAP's IDCODE values.
1395 LOG_WARNING("There are no enabled taps. "
1396 "AUTO PROBING MIGHT NOT WORK!!");
1398 /* REVISIT default clock will often be too fast ... */
1402 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1405 /* Examine DR values first. This discovers problems which will
1406 * prevent communication ... hardware issues like TDO stuck, or
1407 * configuring the wrong number of (enabled) TAPs.
1409 retval
= jtag_examine_chain();
1412 /* complete success */
1414 case ERROR_JTAG_INIT_SOFT_FAIL
:
1415 /* For backward compatibility reasons, try coping with
1416 * configuration errors involving only ID mismatches.
1417 * We might be able to talk to the devices.
1419 LOG_ERROR("Trying to use configured scan chain anyway...");
1420 issue_setup
= false;
1423 /* some hard error; already issued diagnostics */
1427 /* Now look at IR values. Problems here will prevent real
1428 * communication. They mostly mean that the IR length is
1429 * wrong ... or that the IR capture value is wrong. (The
1430 * latter is uncommon, but easily worked around: provide
1431 * ircapture/irmask values during TAP setup.)
1433 retval
= jtag_validate_ircapture();
1434 if (retval
!= ERROR_OK
)
1438 jtag_notify_event(JTAG_TAP_EVENT_SETUP
);
1440 LOG_WARNING("Bypassing JTAG setup events due to errors");
1446 int jtag_interface_quit(void)
1448 if (!jtag
|| !jtag
->quit
)
1451 // close the JTAG interface
1452 int result
= jtag
->quit();
1453 if (ERROR_OK
!= result
)
1454 LOG_ERROR("failed: %d", result
);
1460 int jtag_init_reset(struct command_context
*cmd_ctx
)
1464 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1467 LOG_DEBUG("Initializing with hard TRST+SRST reset");
1470 * This procedure is used by default when OpenOCD triggers a reset.
1471 * It's now done through an overridable Tcl "init_reset" wrapper.
1473 * This started out as a more powerful "get JTAG working" reset than
1474 * jtag_init_inner(), applying TRST because some chips won't activate
1475 * JTAG without a TRST cycle (presumed to be async, though some of
1476 * those chips synchronize JTAG activation using TCK).
1478 * But some chips only activate JTAG as part of an SRST cycle; SRST
1479 * got mixed in. So it became a hard reset routine, which got used
1480 * in more places, and which coped with JTAG reset being forced as
1481 * part of SRST (srst_pulls_trst).
1483 * And even more corner cases started to surface: TRST and/or SRST
1484 * assertion timings matter; some chips need other JTAG operations;
1485 * TRST/SRST sequences can need to be different from these, etc.
1487 * Systems should override that wrapper to support system-specific
1488 * requirements that this not-fully-generic code doesn't handle.
1490 * REVISIT once Tcl code can read the reset_config modes, this won't
1491 * need to be a C routine at all...
1493 jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
1494 if (jtag_reset_config
& RESET_HAS_SRST
)
1496 jtag_add_reset(1, 1);
1497 if ((jtag_reset_config
& RESET_SRST_PULLS_TRST
) == 0)
1498 jtag_add_reset(0, 1);
1500 jtag_add_reset(0, 0);
1501 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1504 /* Check that we can communication on the JTAG chain + eventually we want to
1505 * be able to perform enumeration only after OpenOCD has started
1506 * telnet and GDB server
1508 * That would allow users to more easily perform any magic they need to before
1511 return jtag_init_inner(cmd_ctx
);
1514 int jtag_init(struct command_context
*cmd_ctx
)
1518 if ((retval
= jtag_interface_init(cmd_ctx
)) != ERROR_OK
)
1521 /* guard against oddball hardware: force resets to be inactive */
1522 jtag_add_reset(0, 0);
1523 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1526 if (Jim_Eval_Named(cmd_ctx
->interp
, "jtag_init", __FILE__
, __LINE__
) != JIM_OK
)
1532 unsigned jtag_get_speed_khz(void)
1537 static int jtag_khz_to_speed(unsigned khz
, int* speed
)
1539 LOG_DEBUG("convert khz to interface specific speed value");
1543 LOG_DEBUG("have interface set up");
1545 int retval
= jtag
->khz(jtag_get_speed_khz(), &speed_div1
);
1546 if (ERROR_OK
!= retval
)
1550 *speed
= speed_div1
;
1555 static int jtag_rclk_to_speed(unsigned fallback_speed_khz
, int* speed
)
1557 int retval
= jtag_khz_to_speed(0, speed
);
1558 if ((ERROR_OK
!= retval
) && fallback_speed_khz
)
1560 LOG_DEBUG("trying fallback speed...");
1561 retval
= jtag_khz_to_speed(fallback_speed_khz
, speed
);
1566 static int jtag_set_speed(int speed
)
1569 /* this command can be called during CONFIG,
1570 * in which case jtag isn't initialized */
1571 return jtag
? jtag
->speed(speed
) : ERROR_OK
;
1574 int jtag_config_khz(unsigned khz
)
1576 LOG_DEBUG("handle jtag khz");
1577 clock_mode
= CLOCK_MODE_KHZ
;
1579 int retval
= jtag_khz_to_speed(khz
, &speed
);
1580 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1583 int jtag_config_rclk(unsigned fallback_speed_khz
)
1585 LOG_DEBUG("handle jtag rclk");
1586 clock_mode
= CLOCK_MODE_RCLK
;
1587 rclk_fallback_speed_khz
= fallback_speed_khz
;
1589 int retval
= jtag_rclk_to_speed(fallback_speed_khz
, &speed
);
1590 return (ERROR_OK
!= retval
) ? retval
: jtag_set_speed(speed
);
1593 int jtag_get_speed(void)
1598 case CLOCK_MODE_SPEED
:
1601 case CLOCK_MODE_KHZ
:
1602 jtag_khz_to_speed(jtag_get_speed_khz(), &speed
);
1604 case CLOCK_MODE_RCLK
:
1605 jtag_rclk_to_speed(rclk_fallback_speed_khz
, &speed
);
1608 LOG_ERROR("BUG: unknown jtag clock mode");
1615 int jtag_get_speed_readable(int *khz
)
1617 return jtag
? jtag
->speed_div(jtag_get_speed(), khz
) : ERROR_OK
;
1620 void jtag_set_verify(bool enable
)
1622 jtag_verify
= enable
;
1625 bool jtag_will_verify()
1630 void jtag_set_verify_capture_ir(bool enable
)
1632 jtag_verify_capture_ir
= enable
;
1635 bool jtag_will_verify_capture_ir()
1637 return jtag_verify_capture_ir
;
1640 int jtag_power_dropout(int *dropout
)
1642 return jtag
->power_dropout(dropout
);
1645 int jtag_srst_asserted(int *srst_asserted
)
1647 return jtag
->srst_asserted(srst_asserted
);
1650 enum reset_types
jtag_get_reset_config(void)
1652 return jtag_reset_config
;
1654 void jtag_set_reset_config(enum reset_types type
)
1656 jtag_reset_config
= type
;
1659 int jtag_get_trst(void)
1663 int jtag_get_srst(void)
1668 void jtag_set_nsrst_delay(unsigned delay
)
1670 jtag_nsrst_delay
= delay
;
1672 unsigned jtag_get_nsrst_delay(void)
1674 return jtag_nsrst_delay
;
1676 void jtag_set_ntrst_delay(unsigned delay
)
1678 jtag_ntrst_delay
= delay
;
1680 unsigned jtag_get_ntrst_delay(void)
1682 return jtag_ntrst_delay
;
1686 void jtag_set_nsrst_assert_width(unsigned delay
)
1688 jtag_nsrst_assert_width
= delay
;
1690 unsigned jtag_get_nsrst_assert_width(void)
1692 return jtag_nsrst_assert_width
;
1694 void jtag_set_ntrst_assert_width(unsigned delay
)
1696 jtag_ntrst_assert_width
= delay
;
1698 unsigned jtag_get_ntrst_assert_width(void)
1700 return jtag_ntrst_assert_width
;