/***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
+ * Copyright (C) 2009 Zachary T Welch *
+ * zw@superlucidity.net *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007,2008,2009 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2009 SoftPLC Corporation *
* http://softplc.com *
* dick@softplc.com *
* *
- * Copyright (C) 2009 Zachary T Welch *
- * zw@superlucidity.net *
+ * Copyright (C) 2005 by Dominic Rath *
+ * Dominic.Rath@gmx.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "jtag.h"
-#include "minidriver.h"
+#include "swd.h"
#include "interface.h"
+#include <transport/transport.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
+/* SVF and XSVF are higher level JTAG command sets (for boundary scan) */
+#include "svf/svf.h"
+#include "xsvf/xsvf.h"
-/// The number of JTAG queue flushes (for profiling and debugging purposes).
+/** The number of JTAG queue flushes (for profiling and debugging purposes). */
static int jtag_flush_queue_count;
-static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state),
- int in_num_fields, scan_field_t *in_fields, tap_state_t state);
+/* Sleep this # of ms after flushing the queue */
+static int jtag_flush_queue_sleep;
+
+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),
+ int in_num_fields, struct scan_field *in_fields, tap_state_t state);
/**
* The jtag_error variable is set when an error occurs while executing
* when an error occurs during processing that should be reported during
* jtag_execute_queue().
*
- * Tts value may be checked with jtag_get_error() and cleared with
- * jtag_error_clear(). This value is returned (and cleared) by
- * jtag_execute_queue().
+ * The value is set and cleared, but never read by normal application code.
+ *
+ * This value is returned (and cleared) by jtag_execute_queue().
*/
static int jtag_error = ERROR_OK;
-static const char *jtag_event_strings[] =
-{
- [JTAG_TRST_ASSERTED] = "JTAG controller reset (TLR or TRST)",
+static const char *jtag_event_strings[] = {
+ [JTAG_TRST_ASSERTED] = "TAP reset",
+ [JTAG_TAP_EVENT_SETUP] = "TAP setup",
[JTAG_TAP_EVENT_ENABLE] = "TAP enabled",
- [JTAG_TAP_EVENT_POST_RESET] = "post reset",
[JTAG_TAP_EVENT_DISABLE] = "TAP disabled",
};
/*
* JTAG adapters must initialize with TRST and SRST de-asserted
- * (they're negative logic, so that means *high*)
+ * (they're negative logic, so that means *high*). But some
+ * hardware doesn't necessarily work that way ... so set things
+ * up so that jtag_init() always forces that state.
*/
-static int jtag_trst = 0;
-static int jtag_srst = 0;
+static int jtag_trst = -1;
+static int jtag_srst = -1;
/**
* List all TAPs that have been created.
*/
-static jtag_tap_t *__jtag_all_taps = NULL;
+static struct jtag_tap *__jtag_all_taps;
/**
* The number of TAPs in the __jtag_all_taps list, used to track the
* assigned chain position to new TAPs
*/
-static unsigned jtag_num_taps = 0;
+static unsigned jtag_num_taps;
static enum reset_types jtag_reset_config = RESET_NONE;
-static tap_state_t cmd_queue_end_state = TAP_RESET;
tap_state_t cmd_queue_cur_state = TAP_RESET;
static bool jtag_verify_capture_ir = true;
static int jtag_verify = 1;
-/* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
-static int jtag_nsrst_delay = 0; /* default to no nSRST delay */
-static int jtag_ntrst_delay = 0; /* default to no nTRST delay */
+/* how long the OpenOCD should wait before attempting JTAG communication after reset lines
+ *deasserted (in ms) */
+static int adapter_nsrst_delay; /* default to no nSRST delay */
+static int jtag_ntrst_delay;/* default to no nTRST delay */
+static int adapter_nsrst_assert_width; /* width of assertion */
+static int jtag_ntrst_assert_width; /* width of assertion */
-typedef struct jtag_event_callback_s
-{
- jtag_event_handler_t callback;
- void* priv;
- struct jtag_event_callback_s* next;
-} jtag_event_callback_t;
+/**
+ * Contains a single callback along with a pointer that will be passed
+ * when an event occurs.
+ */
+struct jtag_event_callback {
+ /** a event callback */
+ jtag_event_handler_t callback;
+ /** the private data to pass to the callback */
+ void *priv;
+ /** the next callback */
+ struct jtag_event_callback *next;
+};
/* callbacks to inform high-level handlers about JTAG state changes */
-static jtag_event_callback_t *jtag_event_callbacks;
+static struct jtag_event_callback *jtag_event_callbacks;
/* speed in kHz*/
-static int speed_khz = 0;
+static int speed_khz;
/* speed to fallback to when RCLK is requested but not supported */
-static int rclk_fallback_speed_khz = 0;
-static enum {CLOCK_MODE_SPEED, CLOCK_MODE_KHZ, CLOCK_MODE_RCLK} clock_mode;
-static int jtag_speed = 0;
+static int rclk_fallback_speed_khz;
+static enum {CLOCK_MODE_UNSELECTED, CLOCK_MODE_KHZ, CLOCK_MODE_RCLK} clock_mode;
+static int jtag_speed;
+
+static struct jtag_interface *jtag;
-static struct jtag_interface_s *jtag = NULL;
+const struct swd_driver *swd;
/* configuration */
-jtag_interface_t *jtag_interface = NULL;
+struct jtag_interface *jtag_interface;
+
+void jtag_set_flush_queue_sleep(int ms)
+{
+ jtag_flush_queue_sleep = ms;
+}
void jtag_set_error(int error)
{
return;
jtag_error = error;
}
-int jtag_get_error(void)
-{
- return jtag_error;
-}
+
int jtag_error_clear(void)
{
int temp = jtag_error;
return temp;
}
+/************/
+
+static bool jtag_poll = 1;
+
+bool is_jtag_poll_safe(void)
+{
+ /* Polling can be disabled explicitly with set_enabled(false).
+ * It is also implicitly disabled while TRST is active and
+ * while SRST is gating the JTAG clock.
+ */
+ if (!jtag_poll || jtag_trst != 0)
+ return false;
+ return jtag_srst == 0 || (jtag_reset_config & RESET_SRST_NO_GATING);
+}
+
+bool jtag_poll_get_enabled(void)
+{
+ return jtag_poll;
+}
-jtag_tap_t *jtag_all_taps(void)
+void jtag_poll_set_enabled(bool value)
+{
+ jtag_poll = value;
+}
+
+/************/
+
+struct jtag_tap *jtag_all_taps(void)
{
return __jtag_all_taps;
};
unsigned jtag_tap_count_enabled(void)
{
- jtag_tap_t *t = jtag_all_taps();
+ struct jtag_tap *t = jtag_all_taps();
unsigned n = 0;
- while (t)
- {
+ while (t) {
if (t->enabled)
n++;
t = t->next_tap;
return n;
}
-/// Append a new TAP to the chain of all taps.
-void jtag_tap_add(struct jtag_tap_s *t)
+/** Append a new TAP to the chain of all taps. */
+void jtag_tap_add(struct jtag_tap *t)
{
t->abs_chain_position = jtag_num_taps++;
- jtag_tap_t **tap = &__jtag_all_taps;
+ struct jtag_tap **tap = &__jtag_all_taps;
while (*tap != NULL)
tap = &(*tap)->next_tap;
*tap = t;
}
/* returns a pointer to the n-th device in the scan chain */
-static inline jtag_tap_t *jtag_tap_by_position(unsigned n)
+struct jtag_tap *jtag_tap_by_position(unsigned n)
{
- jtag_tap_t *t = jtag_all_taps();
+ struct jtag_tap *t = jtag_all_taps();
while (t && n-- > 0)
t = t->next_tap;
return t;
}
-jtag_tap_t *jtag_tap_by_string(const char *s)
+struct jtag_tap *jtag_tap_by_string(const char *s)
{
/* try by name first */
- jtag_tap_t *t = jtag_all_taps();
+ struct jtag_tap *t = jtag_all_taps();
- while (t)
- {
+ while (t) {
if (0 == strcmp(t->dotted_name, s))
return t;
t = t->next_tap;
return t;
}
-jtag_tap_t *jtag_tap_by_jim_obj(Jim_Interp *interp, Jim_Obj *o)
-{
- const char *cp = Jim_GetString(o, NULL);
- jtag_tap_t *t = cp ? jtag_tap_by_string(cp) : NULL;
- if (NULL == cp)
- cp = "(unknown)";
- if (NULL == t)
- Jim_SetResult_sprintf(interp, "Tap '%s' could not be found", cp);
- return t;
-}
-
-jtag_tap_t* jtag_tap_next_enabled(jtag_tap_t* p)
+struct jtag_tap *jtag_tap_next_enabled(struct jtag_tap *p)
{
p = p ? p->next_tap : jtag_all_taps();
- while (p)
- {
+ while (p) {
if (p->enabled)
return p;
p = p->next_tap;
return NULL;
}
-const char *jtag_tap_name(const jtag_tap_t *tap)
+const char *jtag_tap_name(const struct jtag_tap *tap)
{
return (tap == NULL) ? "(unknown)" : tap->dotted_name;
}
int jtag_register_event_callback(jtag_event_handler_t callback, void *priv)
{
- jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
+ struct jtag_event_callback **callbacks_p = &jtag_event_callbacks;
if (callback == NULL)
- {
- return ERROR_INVALID_ARGUMENTS;
- }
+ return ERROR_COMMAND_SYNTAX_ERROR;
- if (*callbacks_p)
- {
+ if (*callbacks_p) {
while ((*callbacks_p)->next)
callbacks_p = &((*callbacks_p)->next);
callbacks_p = &((*callbacks_p)->next);
}
- (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
+ (*callbacks_p) = malloc(sizeof(struct jtag_event_callback));
(*callbacks_p)->callback = callback;
(*callbacks_p)->priv = priv;
(*callbacks_p)->next = NULL;
int jtag_unregister_event_callback(jtag_event_handler_t callback, void *priv)
{
- jtag_event_callback_t **callbacks_p;
- jtag_event_callback_t **next;
+ struct jtag_event_callback **p = &jtag_event_callbacks, *temp;
if (callback == NULL)
- {
- return ERROR_INVALID_ARGUMENTS;
- }
-
- for (callbacks_p = &jtag_event_callbacks;
- *callbacks_p != NULL;
- callbacks_p = next)
- {
- next = &((*callbacks_p)->next);
+ return ERROR_COMMAND_SYNTAX_ERROR;
- if ((*callbacks_p)->priv != priv)
+ while (*p) {
+ if (((*p)->priv != priv) || ((*p)->callback != callback)) {
+ p = &(*p)->next;
continue;
-
- if ((*callbacks_p)->callback == callback)
- {
- free(*callbacks_p);
- *callbacks_p = *next;
}
+
+ temp = *p;
+ *p = (*p)->next;
+ free(temp);
}
return ERROR_OK;
int jtag_call_event_callbacks(enum jtag_event event)
{
- jtag_event_callback_t *callback = jtag_event_callbacks;
+ struct jtag_event_callback *callback = jtag_event_callbacks;
LOG_DEBUG("jtag event: %s", jtag_event_strings[event]);
- while (callback)
- {
- jtag_event_callback_t *next;
+ while (callback) {
+ struct jtag_event_callback *next;
/* callback may remove itself */
next = callback->next;
cmd_queue_cur_state = state;
}
-void jtag_alloc_in_value32(scan_field_t *field)
-{
- interface_jtag_alloc_in_value32(field);
-}
-
-void jtag_add_ir_scan_noverify(int in_count, const scan_field_t *in_fields,
- tap_state_t state)
+void jtag_add_ir_scan_noverify(struct jtag_tap *active, const struct scan_field *in_fields,
+ tap_state_t state)
{
jtag_prelude(state);
- int retval = interface_jtag_add_ir_scan(in_count, in_fields, state);
+ int retval = interface_jtag_add_ir_scan(active, in_fields, state);
jtag_set_error(retval);
}
+static void jtag_add_ir_scan_noverify_callback(struct jtag_tap *active,
+ int dummy,
+ const struct scan_field *in_fields,
+ tap_state_t state)
+{
+ jtag_add_ir_scan_noverify(active, in_fields, state);
+}
-void jtag_add_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state)
+/* If fields->in_value is filled out, then the captured IR value will be checked */
+void jtag_add_ir_scan(struct jtag_tap *active, struct scan_field *in_fields, tap_state_t state)
{
assert(state != TAP_RESET);
- if (jtag_verify && jtag_verify_capture_ir)
- {
+ if (jtag_verify && jtag_verify_capture_ir) {
/* 8 x 32 bit id's is enough for all invocations */
- for (int j = 0; j < in_num_fields; j++)
- {
- /* if we are to run a verification of the ir scan, we need to get the input back.
- * We may have to allocate space if the caller didn't ask for the input back.
- */
- in_fields[j].check_value = in_fields[j].tap->expected;
- in_fields[j].check_mask = in_fields[j].tap->expected_mask;
- }
- jtag_add_scan_check(jtag_add_ir_scan_noverify, in_num_fields, in_fields, state);
+ /* if we are to run a verification of the ir scan, we need to get the input back.
+ * We may have to allocate space if the caller didn't ask for the input back.
+ */
+ in_fields->check_value = active->expected;
+ in_fields->check_mask = active->expected_mask;
+ jtag_add_scan_check(active, jtag_add_ir_scan_noverify_callback, 1, in_fields,
+ state);
} else
- {
- jtag_add_ir_scan_noverify(in_num_fields, in_fields, state);
- }
+ jtag_add_ir_scan_noverify(active, in_fields, state);
}
-void jtag_add_plain_ir_scan(int in_num_fields, const scan_field_t *in_fields,
- tap_state_t state)
+void jtag_add_plain_ir_scan(int num_bits, const uint8_t *out_bits, uint8_t *in_bits,
+ tap_state_t state)
{
+ assert(out_bits != NULL);
assert(state != TAP_RESET);
jtag_prelude(state);
int retval = interface_jtag_add_plain_ir_scan(
- in_num_fields, in_fields, state);
+ num_bits, out_bits, in_bits, state);
jtag_set_error(retval);
}
-void jtag_add_callback(jtag_callback1_t f, jtag_callback_data_t data0)
-{
- interface_jtag_add_callback(f, data0);
-}
-
-void jtag_add_callback4(jtag_callback_t f, jtag_callback_data_t data0,
- jtag_callback_data_t data1, jtag_callback_data_t data2,
- jtag_callback_data_t data3)
-{
- interface_jtag_add_callback4(f, data0, data1, data2, data3);
-}
-
static int jtag_check_value_inner(uint8_t *captured, uint8_t *in_check_value,
- uint8_t *in_check_mask, int num_bits);
+ uint8_t *in_check_mask, int num_bits);
-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)
+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)
{
- return jtag_check_value_inner((uint8_t *)data0, (uint8_t *)data1, (uint8_t *)data2, (int)data3);
+ return jtag_check_value_inner((uint8_t *)data0,
+ (uint8_t *)data1,
+ (uint8_t *)data2,
+ (int)data3);
}
-static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state),
- int in_num_fields, scan_field_t *in_fields, tap_state_t state)
+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),
+ int in_num_fields, struct scan_field *in_fields, tap_state_t state)
{
- for (int i = 0; i < in_num_fields; i++)
- {
- struct scan_field_s *field = &in_fields[i];
- field->allocated = 0;
- field->modified = 0;
- if (field->check_value || field->in_value)
- continue;
- interface_jtag_add_scan_check_alloc(field);
- field->modified = 1;
- }
-
- jtag_add_scan(in_num_fields, in_fields, state);
+ jtag_add_scan(active, in_num_fields, in_fields, state);
- for (int i = 0; i < in_num_fields; i++)
- {
- if ((in_fields[i].check_value != NULL) && (in_fields[i].in_value != NULL))
- {
+ for (int i = 0; i < in_num_fields; i++) {
+ if ((in_fields[i].check_value != NULL) && (in_fields[i].in_value != NULL)) {
/* this is synchronous for a minidriver */
- jtag_add_callback4(jtag_check_value_mask_callback, (jtag_callback_data_t)in_fields[i].in_value,
+ jtag_add_callback4(jtag_check_value_mask_callback,
+ (jtag_callback_data_t)in_fields[i].in_value,
(jtag_callback_data_t)in_fields[i].check_value,
(jtag_callback_data_t)in_fields[i].check_mask,
(jtag_callback_data_t)in_fields[i].num_bits);
}
- if (in_fields[i].allocated)
- {
- free(in_fields[i].in_value);
- }
- if (in_fields[i].modified)
- {
- in_fields[i].in_value = NULL;
- }
}
}
-void jtag_add_dr_scan_check(int in_num_fields, scan_field_t *in_fields, tap_state_t state)
+void jtag_add_dr_scan_check(struct jtag_tap *active,
+ int in_num_fields,
+ struct scan_field *in_fields,
+ tap_state_t state)
{
if (jtag_verify)
- {
- jtag_add_scan_check(jtag_add_dr_scan, in_num_fields, in_fields, state);
- } else
- {
- jtag_add_dr_scan(in_num_fields, in_fields, state);
- }
+ jtag_add_scan_check(active, jtag_add_dr_scan, in_num_fields, in_fields, state);
+ else
+ jtag_add_dr_scan(active, in_num_fields, in_fields, state);
}
-void jtag_add_dr_scan(int in_num_fields, const scan_field_t *in_fields,
- tap_state_t state)
+void jtag_add_dr_scan(struct jtag_tap *active,
+ int in_num_fields,
+ const struct scan_field *in_fields,
+ tap_state_t state)
{
assert(state != TAP_RESET);
jtag_prelude(state);
int retval;
- retval = interface_jtag_add_dr_scan(in_num_fields, in_fields, state);
+ retval = interface_jtag_add_dr_scan(active, in_num_fields, in_fields, state);
jtag_set_error(retval);
}
-void jtag_add_plain_dr_scan(int in_num_fields, const scan_field_t *in_fields,
- tap_state_t state)
+void jtag_add_plain_dr_scan(int num_bits, const uint8_t *out_bits, uint8_t *in_bits,
+ tap_state_t state)
{
+ assert(out_bits != NULL);
assert(state != TAP_RESET);
jtag_prelude(state);
int retval;
- retval = interface_jtag_add_plain_dr_scan(in_num_fields, in_fields, state);
+ retval = interface_jtag_add_plain_dr_scan(num_bits, out_bits, in_bits, state);
jtag_set_error(retval);
}
-void jtag_add_dr_out(jtag_tap_t* tap,
- int num_fields, const int* num_bits, const uint32_t* value,
- tap_state_t end_state)
-{
- assert(end_state != TAP_RESET);
- assert(end_state != TAP_INVALID);
-
- cmd_queue_cur_state = end_state;
-
- interface_jtag_add_dr_out(tap,
- num_fields, num_bits, value,
- end_state);
-}
-
void jtag_add_tlr(void)
{
jtag_prelude(TAP_RESET);
/* NOTE: order here matches TRST path in jtag_add_reset() */
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
- jtag_notify_reset();
+ jtag_notify_event(JTAG_TRST_ASSERTED);
+}
+
+/**
+ * If supported by the underlying adapter, this clocks a raw bit sequence
+ * onto TMS for switching betwen JTAG and SWD modes.
+ *
+ * DO NOT use this to bypass the integrity checks and logging provided
+ * by the jtag_add_pathmove() and jtag_add_statemove() calls.
+ *
+ * @param nbits How many bits to clock out.
+ * @param seq The bit sequence. The LSB is bit 0 of seq[0].
+ * @param state The JTAG tap state to record on completion. Use
+ * TAP_INVALID to represent being in in SWD mode.
+ *
+ * @todo Update naming conventions to stop assuming everything is JTAG.
+ */
+int jtag_add_tms_seq(unsigned nbits, const uint8_t *seq, enum tap_state state)
+{
+ int retval;
+
+ if (!(jtag->supported & DEBUG_CAP_TMS_SEQ))
+ return ERROR_JTAG_NOT_IMPLEMENTED;
+
+ jtag_checks();
+ cmd_queue_cur_state = state;
+
+ retval = interface_add_tms_seq(nbits, seq, state);
+ jtag_set_error(retval);
+ return retval;
}
void jtag_add_pathmove(int num_states, const tap_state_t *path)
tap_state_t cur_state = cmd_queue_cur_state;
/* the last state has to be a stable state */
- if (!tap_is_state_stable(path[num_states - 1]))
- {
+ if (!tap_is_state_stable(path[num_states - 1])) {
LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE);
return;
}
- for (int i = 0; i < num_states; i++)
- {
- if (path[i] == TAP_RESET)
- {
+ for (int i = 0; i < num_states; i++) {
+ if (path[i] == TAP_RESET) {
LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
jtag_set_error(ERROR_JTAG_STATE_INVALID);
return;
}
- if (tap_state_transition(cur_state, true) != path[i]
- && tap_state_transition(cur_state, false) != path[i])
- {
+ if (tap_state_transition(cur_state, true) != path[i] &&
+ tap_state_transition(cur_state, false) != path[i]) {
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
- tap_state_name(cur_state), tap_state_name(path[i]));
+ tap_state_name(cur_state), tap_state_name(path[i]));
jtag_set_error(ERROR_JTAG_TRANSITION_INVALID);
return;
}
{
tap_state_t cur_state = cmd_queue_cur_state;
- LOG_DEBUG("cur_state=%s goal_state=%s",
- tap_state_name(cur_state),
- tap_state_name(goal_state));
-
+ if (goal_state != cur_state) {
+ LOG_DEBUG("cur_state=%s goal_state=%s",
+ tap_state_name(cur_state),
+ tap_state_name(goal_state));
+ }
- if (goal_state == cur_state)
- ; /* nothing to do */
- else if (goal_state == TAP_RESET)
- {
+ /* If goal is RESET, be paranoid and force that that transition
+ * (e.g. five TCK cycles, TMS high). Else trust "cur_state".
+ */
+ if (goal_state == TAP_RESET)
jtag_add_tlr();
- }
- else if (tap_is_state_stable(cur_state) && tap_is_state_stable(goal_state))
- {
+ else if (goal_state == cur_state)
+ /* nothing to do */;
+
+ else if (tap_is_state_stable(cur_state) && tap_is_state_stable(goal_state)) {
unsigned tms_bits = tap_get_tms_path(cur_state, goal_state);
unsigned tms_count = tap_get_tms_path_len(cur_state, goal_state);
tap_state_t moves[8];
- assert(tms_count < DIM(moves));
+ assert(tms_count < ARRAY_SIZE(moves));
- for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1)
- {
+ for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1) {
bool bit = tms_bits & 1;
cur_state = tap_state_transition(cur_state, bit);
}
jtag_add_pathmove(tms_count, moves);
- }
- else if (tap_state_transition(cur_state, true) == goal_state
- || tap_state_transition(cur_state, false) == goal_state)
- {
+ } else if (tap_state_transition(cur_state, true) == goal_state
+ || tap_state_transition(cur_state, false) == goal_state)
jtag_add_pathmove(1, &goal_state);
- }
-
else
return ERROR_FAIL;
void jtag_add_clocks(int num_cycles)
{
- if (!tap_is_state_stable(cmd_queue_cur_state))
- {
- LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
- tap_state_name(cmd_queue_cur_state));
- jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE);
- return;
+ if (!tap_is_state_stable(cmd_queue_cur_state)) {
+ LOG_ERROR("jtag_add_clocks() called with TAP in unstable state \"%s\"",
+ tap_state_name(cmd_queue_cur_state));
+ jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE);
+ return;
}
- if (num_cycles > 0)
- {
+ if (num_cycles > 0) {
jtag_checks();
jtag_set_error(interface_jtag_add_clocks(num_cycles));
}
}
+void swd_add_reset(int req_srst)
+{
+ if (req_srst) {
+ if (!(jtag_reset_config & RESET_HAS_SRST)) {
+ LOG_ERROR("BUG: can't assert SRST");
+ jtag_set_error(ERROR_FAIL);
+ return;
+ }
+ req_srst = 1;
+ }
+
+ /* Maybe change SRST signal state */
+ if (jtag_srst != req_srst) {
+ int retval;
+
+ retval = interface_jtag_add_reset(0, req_srst);
+ if (retval != ERROR_OK)
+ jtag_set_error(retval);
+ else
+ retval = jtag_execute_queue();
+
+ if (retval != ERROR_OK) {
+ LOG_ERROR("TRST/SRST error");
+ return;
+ }
+
+ /* SRST resets everything hooked up to that signal */
+ jtag_srst = req_srst;
+ if (jtag_srst) {
+ LOG_DEBUG("SRST line asserted");
+ if (adapter_nsrst_assert_width)
+ jtag_add_sleep(adapter_nsrst_assert_width * 1000);
+ } else {
+ LOG_DEBUG("SRST line released");
+ if (adapter_nsrst_delay)
+ jtag_add_sleep(adapter_nsrst_delay * 1000);
+ }
+ }
+}
+
void jtag_add_reset(int req_tlr_or_trst, int req_srst)
{
int trst_with_tlr = 0;
if (!(jtag_reset_config & RESET_HAS_TRST))
trst_with_tlr = 1;
else if ((jtag_reset_config & RESET_TRST_PULLS_SRST) != 0
- && !req_srst)
+ && !req_srst)
trst_with_tlr = 1;
else
new_trst = 1;
retval = jtag_execute_queue();
if (retval != ERROR_OK) {
- LOG_ERROR("TRST/SRST error %d", retval);
+ LOG_ERROR("TRST/SRST error");
return;
}
}
/* SRST resets everything hooked up to that signal */
if (jtag_srst != new_srst) {
jtag_srst = new_srst;
- if (jtag_srst)
+ if (jtag_srst) {
LOG_DEBUG("SRST line asserted");
- else {
+ if (adapter_nsrst_assert_width)
+ jtag_add_sleep(adapter_nsrst_assert_width * 1000);
+ } else {
LOG_DEBUG("SRST line released");
- if (jtag_nsrst_delay)
- jtag_add_sleep(jtag_nsrst_delay * 1000);
+ if (adapter_nsrst_delay)
+ jtag_add_sleep(adapter_nsrst_delay * 1000);
}
}
*/
if (trst_with_tlr) {
LOG_DEBUG("JTAG reset with TLR instead of TRST");
- jtag_set_end_state(TAP_RESET);
jtag_add_tlr();
} else if (jtag_trst != new_trst) {
if (jtag_trst) {
LOG_DEBUG("TRST line asserted");
tap_set_state(TAP_RESET);
+ if (jtag_ntrst_assert_width)
+ jtag_add_sleep(jtag_ntrst_assert_width * 1000);
} else {
LOG_DEBUG("TRST line released");
if (jtag_ntrst_delay)
* sequence must match jtag_add_tlr().
*/
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
- jtag_notify_reset();
+ jtag_notify_event(JTAG_TRST_ASSERTED);
}
}
}
-tap_state_t jtag_set_end_state(tap_state_t state)
-{
- if ((state == TAP_DRSHIFT)||(state == TAP_IRSHIFT))
- {
- LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
- }
-
- if (state != TAP_INVALID)
- cmd_queue_end_state = state;
- return cmd_queue_end_state;
-}
-
-tap_state_t jtag_get_end_state(void)
-{
- return cmd_queue_end_state;
-}
-
void jtag_add_sleep(uint32_t us)
{
- /// @todo Here, keep_alive() appears to be a layering violation!!!
+ /** @todo Here, keep_alive() appears to be a layering violation!!! */
keep_alive();
jtag_set_error(interface_jtag_add_sleep(us));
}
static int jtag_check_value_inner(uint8_t *captured, uint8_t *in_check_value,
- uint8_t *in_check_mask, int num_bits)
+ uint8_t *in_check_mask, int num_bits)
{
int retval = ERROR_OK;
-
- int compare_failed = 0;
+ int compare_failed;
if (in_check_mask)
compare_failed = buf_cmp_mask(captured, in_check_value, in_check_mask, num_bits);
if (compare_failed) {
char *captured_str, *in_check_value_str;
- int bits = (num_bits > DEBUG_JTAG_IOZ)
- ? DEBUG_JTAG_IOZ
- : num_bits;
+ int bits = (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits;
/* NOTE: we've lost diagnostic context here -- 'which tap' */
in_check_value_str = buf_to_str(in_check_value, bits, 16);
LOG_WARNING("Bad value '%s' captured during DR or IR scan:",
- captured_str);
+ captured_str);
LOG_WARNING(" check_value: 0x%s", in_check_value_str);
free(captured_str);
return retval;
}
-void jtag_check_value_mask(scan_field_t *field, uint8_t *value, uint8_t *mask)
+void jtag_check_value_mask(struct scan_field *field, uint8_t *value, uint8_t *mask)
{
assert(field->in_value != NULL);
- if (value == NULL)
- {
+ if (value == NULL) {
/* no checking to do */
return;
}
jtag_set_error(retval);
}
-
-
int default_interface_jtag_execute_queue(void)
{
- if (NULL == jtag)
- {
+ if (NULL == jtag) {
LOG_ERROR("No JTAG interface configured yet. "
"Issue 'init' command in startup scripts "
"before communicating with targets.");
{
jtag_flush_queue_count++;
jtag_set_error(interface_jtag_execute_queue());
+
+ if (jtag_flush_queue_sleep > 0) {
+ /* For debug purposes it can be useful to test performance
+ * or behavior when delaying after flushing the queue,
+ * e.g. to simulate long roundtrip times.
+ */
+ usleep(jtag_flush_queue_sleep * 1000);
+ }
}
int jtag_get_flush_queue_count(void)
static int jtag_reset_callback(enum jtag_event event, void *priv)
{
- jtag_tap_t *tap = priv;
+ struct jtag_tap *tap = priv;
- LOG_DEBUG("TAP %s event %s", tap->dotted_name,
- jtag_event_strings[event]);
-
- if (event == JTAG_TRST_ASSERTED)
- {
+ if (event == JTAG_TRST_ASSERTED) {
tap->enabled = !tap->disabled_after_reset;
/* current instruction is either BYPASS or IDCODE */
return ERROR_OK;
}
+/* sleep at least us microseconds. When we sleep more than 1000ms we
+ * do an alive sleep, i.e. keep GDB alive. Note that we could starve
+ * GDB if we slept for <1000ms many times.
+ */
void jtag_sleep(uint32_t us)
{
- alive_sleep(us/1000);
+ if (us < 1000)
+ usleep(us);
+ else
+ alive_sleep((us+999)/1000);
}
-/// maximum number of JTAG devices expected in the chain
+/* Maximum number of enabled JTAG devices we expect in the scan chain,
+ * plus one (to detect garbage at the end). Devices that don't support
+ * IDCODE take up fewer bits, possibly allowing a few more devices.
+ */
#define JTAG_MAX_CHAIN_SIZE 20
#define EXTRACT_MFG(X) (((X) & 0xffe) >> 1)
#define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
#define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
+/* A reserved manufacturer ID is used in END_OF_CHAIN_FLAG, so we
+ * know that no valid TAP will have it as an IDCODE value.
+ */
+#define END_OF_CHAIN_FLAG 0xffffffff
+
+/* a larger IR length than we ever expect to autoprobe */
+#define JTAG_IRLEN_MAX 60
+
static int jtag_examine_chain_execute(uint8_t *idcode_buffer, unsigned num_idcode)
{
- scan_field_t field = {
- .tap = NULL,
- .num_bits = num_idcode * 32,
- .out_value = idcode_buffer,
- .in_value = idcode_buffer,
- };
+ struct scan_field field = {
+ .num_bits = num_idcode * 32,
+ .out_value = idcode_buffer,
+ .in_value = idcode_buffer,
+ };
- // initialize to the end of chain ID value
+ /* initialize to the end of chain ID value */
for (unsigned i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
- buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
+ buf_set_u32(idcode_buffer, i * 32, 32, END_OF_CHAIN_FLAG);
- jtag_add_plain_dr_scan(1, &field, TAP_DRPAUSE);
+ jtag_add_plain_dr_scan(field.num_bits, field.out_value, field.in_value, TAP_DRPAUSE);
jtag_add_tlr();
return jtag_execute_queue();
}
uint8_t zero_check = 0x0;
uint8_t one_check = 0xff;
- for (unsigned i = 0; i < count * 4; i++)
- {
+ for (unsigned i = 0; i < count * 4; i++) {
zero_check |= idcodes[i];
one_check &= idcodes[i];
}
/* if there wasn't a single non-zero bit or if all bits were one,
- * the scan is not valid */
- if (zero_check == 0x00 || one_check == 0xff)
- {
- LOG_ERROR("JTAG communication failure: check connection, "
- "JTAG interface, target power etc.");
+ * the scan is not valid. We wrote a mix of both values; either
+ *
+ * - There's a hardware issue (almost certainly):
+ * + all-zeroes can mean a target stuck in JTAG reset
+ * + all-ones tends to mean no target
+ * - The scan chain is WAY longer than we can handle, *AND* either
+ * + there are several hundreds of TAPs in bypass, or
+ * + at least a few dozen TAPs all have an all-ones IDCODE
+ */
+ if (zero_check == 0x00 || one_check == 0xff) {
+ LOG_ERROR("JTAG scan chain interrogation failed: all %s",
+ (zero_check == 0x00) ? "zeroes" : "ones");
+ LOG_ERROR("Check JTAG interface, timings, target power, etc.");
return false;
}
return true;
}
static void jtag_examine_chain_display(enum log_levels level, const char *msg,
- const char *name, uint32_t idcode)
+ const char *name, uint32_t idcode)
{
- log_printf_lf(level, __FILE__, __LINE__, __FUNCTION__,
- "JTAG tap: %s %16.16s: 0x%08x "
- "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
- name, msg,
- (unsigned int)idcode,
- (unsigned int)EXTRACT_MFG(idcode),
- (unsigned int)EXTRACT_PART(idcode),
- (unsigned int)EXTRACT_VER(idcode));
+ log_printf_lf(level, __FILE__, __LINE__, __func__,
+ "JTAG tap: %s %16.16s: 0x%08x "
+ "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
+ name, msg,
+ (unsigned int)idcode,
+ (unsigned int)EXTRACT_MFG(idcode),
+ (unsigned int)EXTRACT_PART(idcode),
+ (unsigned int)EXTRACT_VER(idcode));
}
static bool jtag_idcode_is_final(uint32_t idcode)
{
- return idcode == 0x000000FF || idcode == 0xFFFFFFFF;
+ /*
+ * Some devices, such as AVR8, will output all 1's instead
+ * of TDI input value at end of chain. Allow those values
+ * instead of failing.
+ */
+ return idcode == END_OF_CHAIN_FLAG;
}
/**
* all as expected, but a single JTAG device requires only 64 bits to be
* read back correctly. This can help identify and diagnose problems
* with the JTAG chain earlier, gives more helpful/explicit error messages.
+ * Returns TRUE iff garbage was found.
*/
-static void jtag_examine_chain_end(uint8_t *idcodes, unsigned count, unsigned max)
+static bool jtag_examine_chain_end(uint8_t *idcodes, unsigned count, unsigned max)
{
bool triggered = false;
- for (; count < max - 31; count += 32)
- {
+ for (; count < max - 31; count += 32) {
uint32_t idcode = buf_get_u32(idcodes, count, 32);
- // do not trigger the warning if the data looks good
- if (!triggered && jtag_idcode_is_final(idcode))
+
+ /* do not trigger the warning if the data looks good */
+ if (jtag_idcode_is_final(idcode))
continue;
LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
- count, (unsigned int)idcode);
+ count, (unsigned int)idcode);
triggered = true;
}
+ return triggered;
}
-static bool jtag_examine_chain_match_tap(const struct jtag_tap_s *tap)
+static bool jtag_examine_chain_match_tap(const struct jtag_tap *tap)
{
- if (0 == tap->expected_ids_cnt)
- {
- /// @todo Enable LOG_INFO to ask for reports about unknown TAP IDs.
-#if 0
- LOG_INFO("Uknown JTAG TAP ID: 0x%08x", tap->idcode)
- LOG_INFO("Please report the chip name and reported ID code to the openocd project");
-#endif
+ uint32_t idcode = tap->idcode;
+
+ /* ignore expected BYPASS codes; warn otherwise */
+ if (0 == tap->expected_ids_cnt && !idcode)
return true;
- }
+
+ /* optionally ignore the JTAG version field - bits 28-31 of IDCODE */
+ uint32_t mask = tap->ignore_version ? ~(0xf << 28) : ~0;
+
+ idcode &= mask;
/* Loop over the expected identification codes and test for a match */
- uint8_t ii;
- for (ii = 0; ii < tap->expected_ids_cnt; ii++)
- {
- if (tap->idcode == tap->expected_ids[ii])
- break;
- }
+ unsigned ii, limit = tap->expected_ids_cnt;
- /* If none of the expected ids matched, log an error */
- if (ii != tap->expected_ids_cnt)
- {
- LOG_DEBUG("JTAG Tap/device matched");
- return true;
+ for (ii = 0; ii < limit; ii++) {
+ uint32_t expected = tap->expected_ids[ii] & mask;
+
+ if (idcode == expected)
+ return true;
+
+ /* treat "-expected-id 0" as a "don't-warn" wildcard */
+ if (0 == tap->expected_ids[ii])
+ return true;
}
- jtag_examine_chain_display(LOG_LVL_ERROR, "got",
- tap->dotted_name, tap->idcode);
- for (ii = 0; ii < tap->expected_ids_cnt; ii++)
- {
+
+ /* If none of the expected ids matched, warn */
+ jtag_examine_chain_display(LOG_LVL_WARNING, "UNEXPECTED",
+ tap->dotted_name, tap->idcode);
+ for (ii = 0; ii < limit; ii++) {
char msg[32];
- snprintf(msg, sizeof(msg), "expected %hhu of %hhu",
- ii + 1, tap->expected_ids_cnt);
+
+ snprintf(msg, sizeof(msg), "expected %u of %u", ii + 1, limit);
jtag_examine_chain_display(LOG_LVL_ERROR, msg,
- tap->dotted_name, tap->expected_ids[ii]);
+ tap->dotted_name, tap->expected_ids[ii]);
}
return false;
}
/* Try to examine chain layout according to IEEE 1149.1 §12
+ * This is called a "blind interrogation" of the scan chain.
*/
static int jtag_examine_chain(void)
{
uint8_t idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
- unsigned device_count = 0;
-
- jtag_examine_chain_execute(idcode_buffer, JTAG_MAX_CHAIN_SIZE);
+ unsigned bit_count;
+ int retval;
+ int tapcount = 0;
+ bool autoprobe = false;
+ /* DR scan to collect BYPASS or IDCODE register contents.
+ * Then make sure the scan data has both ones and zeroes.
+ */
+ LOG_DEBUG("DR scan interrogation for IDCODE/BYPASS");
+ retval = jtag_examine_chain_execute(idcode_buffer, JTAG_MAX_CHAIN_SIZE);
+ if (retval != ERROR_OK)
+ return retval;
if (!jtag_examine_chain_check(idcode_buffer, JTAG_MAX_CHAIN_SIZE))
return ERROR_JTAG_INIT_FAILED;
/* point at the 1st tap */
- jtag_tap_t *tap = jtag_tap_next_enabled(NULL);
- if (tap == NULL)
- {
- LOG_ERROR("JTAG: No taps enabled?");
- return ERROR_JTAG_INIT_FAILED;
- }
+ struct jtag_tap *tap = jtag_tap_next_enabled(NULL);
+
+ if (!tap)
+ autoprobe = true;
- for (unsigned bit_count = 0;
- tap && bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;
- tap = jtag_tap_next_enabled(tap))
- {
+ for (bit_count = 0;
+ tap && bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;
+ tap = jtag_tap_next_enabled(tap)) {
uint32_t idcode = buf_get_u32(idcode_buffer, bit_count, 32);
- if ((idcode & 1) == 0)
- {
- /* LSB must not be 0, this indicates a device in bypass */
- LOG_WARNING("Tap/Device does not have IDCODE");
+ if ((idcode & 1) == 0) {
+ /* Zero for LSB indicates a device in bypass */
+ LOG_INFO("TAP %s does not have IDCODE",
+ tap->dotted_name);
idcode = 0;
tap->hasidcode = false;
bit_count += 1;
- }
- else
- {
+ } else {
+ /* Friendly devices support IDCODE */
tap->hasidcode = true;
+ jtag_examine_chain_display(LOG_LVL_INFO,
+ "tap/device found",
+ tap->dotted_name, idcode);
- /*
- * End of chain (invalid manufacturer ID) some devices, such
- * as AVR will output all 1's instead of TDI input value at
- * end of chain.
- */
- if (jtag_idcode_is_final(idcode))
- {
- jtag_examine_chain_end(idcode_buffer,
- bit_count + 32, JTAG_MAX_CHAIN_SIZE * 32);
- break;
- }
+ bit_count += 32;
+ }
+ tap->idcode = idcode;
+
+ /* ensure the TAP ID matches what was expected */
+ if (!jtag_examine_chain_match_tap(tap))
+ retval = ERROR_JTAG_INIT_SOFT_FAIL;
+ }
- jtag_examine_chain_display(LOG_LVL_INFO, "tap/device found",
- tap ? tap->dotted_name : "(not-named)",
- idcode);
+ /* Fail if too many TAPs were enabled for us to verify them all. */
+ if (tap) {
+ LOG_ERROR("Too many TAPs enabled; '%s' ignored.",
+ tap->dotted_name);
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ /* if autoprobing, the tap list is still empty ... populate it! */
+ while (autoprobe && bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31) {
+ uint32_t idcode;
+ char buf[12];
+
+ /* Is there another TAP? */
+ idcode = buf_get_u32(idcode_buffer, bit_count, 32);
+ if (jtag_idcode_is_final(idcode))
+ break;
+
+ /* Default everything in this TAP except IR length.
+ *
+ * REVISIT create a jtag_alloc(chip, tap) routine, and
+ * share it with jim_newtap_cmd().
+ */
+ tap = calloc(1, sizeof *tap);
+ if (!tap)
+ return ERROR_FAIL;
+
+ sprintf(buf, "auto%d", tapcount++);
+ tap->chip = strdup(buf);
+ tap->tapname = strdup("tap");
+
+ sprintf(buf, "%s.%s", tap->chip, tap->tapname);
+ tap->dotted_name = strdup(buf);
+ /* tap->ir_length == 0 ... signifying irlen autoprobe */
+ tap->ir_capture_mask = 0x03;
+ tap->ir_capture_value = 0x01;
+
+ tap->enabled = true;
+
+ if ((idcode & 1) == 0) {
+ bit_count += 1;
+ tap->hasidcode = false;
+ } else {
bit_count += 32;
+ tap->hasidcode = true;
+ tap->idcode = idcode;
+
+ tap->expected_ids_cnt = 1;
+ tap->expected_ids = malloc(sizeof(uint32_t));
+ tap->expected_ids[0] = idcode;
}
- device_count++;
- if (!tap)
- continue;
- tap->idcode = idcode;
+ LOG_WARNING("AUTO %s - use \"jtag newtap "
+ "%s %s -expected-id 0x%8.8" PRIx32 " ...\"",
+ tap->dotted_name, tap->chip, tap->tapname,
+ tap->idcode);
- // ensure the TAP ID does matches what was expected
- if (!jtag_examine_chain_match_tap(tap))
- return ERROR_JTAG_INIT_FAILED;
+ jtag_tap_init(tap);
}
- /* see if number of discovered devices matches configuration */
- if (device_count != jtag_tap_count_enabled())
- {
- LOG_ERROR("number of discovered devices in JTAG chain (%i) "
- "does not match (enabled) configuration (%i), total taps: %d",
- device_count, jtag_tap_count_enabled(), jtag_tap_count());
- LOG_ERROR("check the config file and ensure proper JTAG communication"
- " (connections, speed, ...)");
+ /* After those IDCODE or BYPASS register values should be
+ * only the data we fed into the scan chain.
+ */
+ if (jtag_examine_chain_end(idcode_buffer, bit_count,
+ 8 * sizeof(idcode_buffer))) {
+ LOG_ERROR("double-check your JTAG setup (interface, "
+ "speed, missing TAPs, ...)");
return ERROR_JTAG_INIT_FAILED;
}
- return ERROR_OK;
+ /* Return success or, for backwards compatibility if only
+ * some IDCODE values mismatched, a soft/continuable fault.
+ */
+ return retval;
}
-int jtag_validate_chain(void)
+/*
+ * Validate the date loaded by entry to the Capture-IR state, to help
+ * find errors related to scan chain configuration (wrong IR lengths)
+ * or communication.
+ *
+ * Entry state can be anything. On non-error exit, all TAPs are in
+ * bypass mode. On error exits, the scan chain is reset.
+ */
+static int jtag_validate_ircapture(void)
{
- jtag_tap_t *tap;
+ struct jtag_tap *tap;
int total_ir_length = 0;
uint8_t *ir_test = NULL;
- scan_field_t field;
+ struct scan_field field;
+ uint64_t val;
int chain_pos = 0;
+ int retval;
- tap = NULL;
- total_ir_length = 0;
- for (;;) {
- tap = jtag_tap_next_enabled(tap);
- if (tap == NULL) {
- break;
- }
- total_ir_length += tap->ir_length;
+ /* when autoprobing, accomodate huge IR lengths */
+ for (tap = NULL, total_ir_length = 0;
+ (tap = jtag_tap_next_enabled(tap)) != NULL;
+ total_ir_length += tap->ir_length) {
+ if (tap->ir_length == 0)
+ total_ir_length += JTAG_IRLEN_MAX;
}
+ /* increase length to add 2 bit sentinel after scan */
total_ir_length += 2;
- ir_test = malloc(CEIL(total_ir_length, 8));
+
+ ir_test = malloc(DIV_ROUND_UP(total_ir_length, 8));
+ if (ir_test == NULL)
+ return ERROR_FAIL;
+
+ /* after this scan, all TAPs will capture BYPASS instructions */
buf_set_ones(ir_test, total_ir_length);
- field.tap = NULL;
field.num_bits = total_ir_length;
field.out_value = ir_test;
field.in_value = ir_test;
+ jtag_add_plain_ir_scan(field.num_bits, field.out_value, field.in_value, TAP_IDLE);
- jtag_add_plain_ir_scan(1, &field, TAP_IRPAUSE);
- jtag_add_tlr();
-
- int retval;
+ LOG_DEBUG("IR capture validation scan");
retval = jtag_execute_queue();
if (retval != ERROR_OK)
- return retval;
+ goto done;
tap = NULL;
chain_pos = 0;
- int val;
- for (;;) {
+
+ for (;; ) {
tap = jtag_tap_next_enabled(tap);
- if (tap == NULL) {
+ if (tap == NULL)
break;
+
+ /* If we're autoprobing, guess IR lengths. They must be at
+ * least two bits. Guessing will fail if (a) any TAP does
+ * not conform to the JTAG spec; or (b) when the upper bits
+ * captured from some conforming TAP are nonzero. Or if
+ * (c) an IR length is longer than 32 bits -- which is only
+ * an implementation limit, which could someday be raised.
+ *
+ * REVISIT optimization: if there's a *single* TAP we can
+ * lift restrictions (a) and (b) by scanning a recognizable
+ * pattern before the all-ones BYPASS. Check for where the
+ * pattern starts in the result, instead of an 0...01 value.
+ *
+ * REVISIT alternative approach: escape to some tcl code
+ * which could provide more knowledge, based on IDCODE; and
+ * only guess when that has no success.
+ */
+ if (tap->ir_length == 0) {
+ tap->ir_length = 2;
+ while ((val = buf_get_u64(ir_test, chain_pos, tap->ir_length + 1)) == 1
+ && tap->ir_length <= 64) {
+ tap->ir_length++;
+ }
+ LOG_WARNING("AUTO %s - use \"... -irlen %d\"",
+ jtag_tap_name(tap), tap->ir_length);
}
- val = buf_get_u32(ir_test, chain_pos, 2);
- /* Only fail this check if we have IDCODE for this device */
- if ((val != 0x1)&&(tap->hasidcode))
- {
- char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
- LOG_ERROR("Could not validate JTAG scan chain, IR mismatch, scan returned 0x%s. tap=%s pos=%d expected 0x1 got %0x", cbuf, jtag_tap_name(tap), chain_pos, val);
- free(cbuf);
- free(ir_test);
- return ERROR_JTAG_INIT_FAILED;
+ /* Validate the two LSBs, which must be 01 per JTAG spec.
+ *
+ * Or ... more bits could be provided by TAP declaration.
+ * Plus, some taps (notably in i.MX series chips) violate
+ * this part of the JTAG spec, so their capture mask/value
+ * attributes might disable this test.
+ */
+ val = buf_get_u64(ir_test, chain_pos, tap->ir_length);
+ if ((val & tap->ir_capture_mask) != tap->ir_capture_value) {
+ LOG_ERROR("%s: IR capture error; saw 0x%0*" PRIx64 " not 0x%0*" PRIx32,
+ jtag_tap_name(tap),
+ (tap->ir_length + 7) / tap->ir_length, val,
+ (tap->ir_length + 7) / tap->ir_length, tap->ir_capture_value);
+
+ retval = ERROR_JTAG_INIT_FAILED;
+ goto done;
}
+ LOG_DEBUG("%s: IR capture 0x%0*" PRIx64, jtag_tap_name(tap),
+ (tap->ir_length + 7) / tap->ir_length, val);
chain_pos += tap->ir_length;
}
- val = buf_get_u32(ir_test, chain_pos, 2);
- if (val != 0x3)
- {
+ /* verify the '11' sentinel we wrote is returned at the end */
+ val = buf_get_u64(ir_test, chain_pos, 2);
+ if (val != 0x3) {
char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
- LOG_ERROR("Could not validate end of JTAG scan chain, IR mismatch, scan returned 0x%s. pos=%d expected 0x3 got %0x", cbuf, chain_pos, val);
+
+ LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
+ chain_pos, cbuf);
free(cbuf);
- free(ir_test);
- return ERROR_JTAG_INIT_FAILED;
+ retval = ERROR_JTAG_INIT_FAILED;
}
+done:
free(ir_test);
-
- return ERROR_OK;
+ if (retval != ERROR_OK) {
+ jtag_add_tlr();
+ jtag_execute_queue();
+ }
+ return retval;
}
-
-void jtag_tap_init(jtag_tap_t *tap)
+void jtag_tap_init(struct jtag_tap *tap)
{
- assert(0 != tap->ir_length);
+ unsigned ir_len_bits;
+ unsigned ir_len_bytes;
- tap->expected = malloc(tap->ir_length);
- tap->expected_mask = malloc(tap->ir_length);
- tap->cur_instr = malloc(tap->ir_length);
+ /* if we're autoprobing, cope with potentially huge ir_length */
+ ir_len_bits = tap->ir_length ? : JTAG_IRLEN_MAX;
+ ir_len_bytes = DIV_ROUND_UP(ir_len_bits, 8);
- /// @todo cope sanely with ir_length bigger than 32 bits
- buf_set_u32(tap->expected, 0, tap->ir_length, tap->ir_capture_value);
- buf_set_u32(tap->expected_mask, 0, tap->ir_length, tap->ir_capture_mask);
- buf_set_ones(tap->cur_instr, tap->ir_length);
+ tap->expected = calloc(1, ir_len_bytes);
+ tap->expected_mask = calloc(1, ir_len_bytes);
+ tap->cur_instr = malloc(ir_len_bytes);
+
+ /** @todo cope better with ir_length bigger than 32 bits */
+ if (ir_len_bits > 32)
+ ir_len_bits = 32;
- // place TAP in bypass mode
+ buf_set_u32(tap->expected, 0, ir_len_bits, tap->ir_capture_value);
+ buf_set_u32(tap->expected_mask, 0, ir_len_bits, tap->ir_capture_mask);
+
+ /* TAP will be in bypass mode after jtag_validate_ircapture() */
tap->bypass = 1;
- // register the reset callback for the TAP
+ buf_set_ones(tap->cur_instr, tap->ir_length);
+
+ /* register the reset callback for the TAP */
jtag_register_event_callback(&jtag_reset_callback, tap);
+ jtag_tap_add(tap);
LOG_DEBUG("Created Tap: %s @ abs position %d, "
"irlen %d, capture: 0x%x mask: 0x%x", tap->dotted_name,
- tap->abs_chain_position, tap->ir_length,
- (unsigned int)(tap->ir_capture_value), (unsigned int)(tap->ir_capture_mask));
- jtag_tap_add(tap);
+ tap->abs_chain_position, tap->ir_length,
+ (unsigned) tap->ir_capture_value,
+ (unsigned) tap->ir_capture_mask);
}
-void jtag_tap_free(jtag_tap_t *tap)
+void jtag_tap_free(struct jtag_tap *tap)
{
jtag_unregister_event_callback(&jtag_reset_callback, tap);
- /// @todo is anything missing? no memory leaks please
+ /** @todo is anything missing? no memory leaks please */
+ free((void *)tap->expected);
free((void *)tap->expected_ids);
free((void *)tap->chip);
free((void *)tap->tapname);
free(tap);
}
-int jtag_interface_init(struct command_context_s *cmd_ctx)
+/**
+ * Do low-level setup like initializing registers, output signals,
+ * and clocking.
+ */
+int adapter_init(struct command_context *cmd_ctx)
{
if (jtag)
return ERROR_OK;
- if (!jtag_interface)
- {
+ if (!jtag_interface) {
/* nothing was previously specified by "interface" command */
- LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
+ LOG_ERROR("Debug Adapter has to be specified, "
+ "see \"interface\" command");
return ERROR_JTAG_INVALID_INTERFACE;
}
+ int retval;
+ retval = jtag_interface->init();
+ if (retval != ERROR_OK)
+ return retval;
jtag = jtag_interface;
- if (jtag_interface->init() != ERROR_OK)
- {
- jtag = NULL;
+
+ /* LEGACY SUPPORT ... adapter drivers must declare what
+ * transports they allow. Until they all do so, assume
+ * the legacy drivers are JTAG-only
+ */
+ if (!transports_are_declared()) {
+ LOG_ERROR("Adapter driver '%s' did not declare "
+ "which transports it allows; assuming "
+ "JTAG-only", jtag->name);
+ retval = allow_transports(cmd_ctx, jtag_only);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ if (jtag->speed == NULL) {
+ LOG_INFO("This adapter doesn't support configurable speed");
+ return ERROR_OK;
+ }
+
+ if (CLOCK_MODE_UNSELECTED == clock_mode) {
+ LOG_ERROR("An adapter speed is not selected in the init script."
+ " Insert a call to adapter_khz or jtag_rclk to proceed.");
return ERROR_JTAG_INIT_FAILED;
}
int requested_khz = jtag_get_speed_khz();
int actual_khz = requested_khz;
- int retval = jtag_get_speed_readable(&actual_khz);
+ int jtag_speed_var = 0;
+ retval = jtag_get_speed(&jtag_speed_var);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = jtag->speed(jtag_speed_var);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = jtag_get_speed_readable(&actual_khz);
if (ERROR_OK != retval)
- LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
- else if (actual_khz)
- {
+ LOG_INFO("adapter-specific clock speed value %d", jtag_speed_var);
+ else if (actual_khz) {
+ /* Adaptive clocking -- JTAG-specific */
if ((CLOCK_MODE_RCLK == clock_mode)
- || ((CLOCK_MODE_KHZ == clock_mode) && !requested_khz))
- {
+ || ((CLOCK_MODE_KHZ == clock_mode) && !requested_khz)) {
LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
- , actual_khz);
- }
- else
+ , actual_khz);
+ } else
LOG_INFO("clock speed %d kHz", actual_khz);
- }
- else
+ } else
LOG_INFO("RCLK (adaptive clock speed)");
return ERROR_OK;
}
-static int jtag_init_inner(struct command_context_s *cmd_ctx)
+int jtag_init_inner(struct command_context *cmd_ctx)
{
- jtag_tap_t *tap;
+ struct jtag_tap *tap;
int retval;
+ bool issue_setup = true;
LOG_DEBUG("Init JTAG chain");
tap = jtag_tap_next_enabled(NULL);
if (tap == NULL) {
- LOG_ERROR("There are no enabled taps?");
- return ERROR_JTAG_INIT_FAILED;
+ /* Once JTAG itself is properly set up, and the scan chain
+ * isn't absurdly large, IDCODE autoprobe should work fine.
+ *
+ * But ... IRLEN autoprobe can fail even on systems which
+ * are fully conformant to JTAG. Also, JTAG setup can be
+ * quite finicky on some systems.
+ *
+ * REVISIT: if TAP autoprobe works OK, then in many cases
+ * we could escape to tcl code and set up targets based on
+ * the TAP's IDCODE values.
+ */
+ LOG_WARNING("There are no enabled taps. "
+ "AUTO PROBING MIGHT NOT WORK!!");
+
+ /* REVISIT default clock will often be too fast ... */
}
jtag_add_tlr();
- if ((retval = jtag_execute_queue()) != ERROR_OK)
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
return retval;
- /* examine chain first, as this could discover the real chain layout */
- if (jtag_examine_chain() != ERROR_OK)
- {
- LOG_ERROR("trying to validate configured JTAG chain anyway...");
+ /* Examine DR values first. This discovers problems which will
+ * prevent communication ... hardware issues like TDO stuck, or
+ * configuring the wrong number of (enabled) TAPs.
+ */
+ retval = jtag_examine_chain();
+ switch (retval) {
+ case ERROR_OK:
+ /* complete success */
+ break;
+ default:
+ /* For backward compatibility reasons, try coping with
+ * configuration errors involving only ID mismatches.
+ * We might be able to talk to the devices.
+ *
+ * Also the device might be powered down during startup.
+ *
+ * After OpenOCD starts, we can try to power on the device
+ * and run a reset.
+ */
+ LOG_ERROR("Trying to use configured scan chain anyway...");
+ issue_setup = false;
+ break;
}
- if (jtag_validate_chain() != ERROR_OK)
- {
- LOG_WARNING("Could not validate JTAG chain, continuing anyway...");
+ /* Now look at IR values. Problems here will prevent real
+ * communication. They mostly mean that the IR length is
+ * wrong ... or that the IR capture value is wrong. (The
+ * latter is uncommon, but easily worked around: provide
+ * ircapture/irmask values during TAP setup.)
+ */
+ retval = jtag_validate_ircapture();
+ if (retval != ERROR_OK) {
+ /* The target might be powered down. The user
+ * can power it up and reset it after firing
+ * up OpenOCD.
+ */
+ issue_setup = false;
}
+ if (issue_setup)
+ jtag_notify_event(JTAG_TAP_EVENT_SETUP);
+ else
+ LOG_WARNING("Bypassing JTAG setup events due to errors");
+
+
return ERROR_OK;
}
-int jtag_interface_quit(void)
+int adapter_quit(void)
{
if (!jtag || !jtag->quit)
return ERROR_OK;
- // close the JTAG interface
+ /* close the JTAG interface */
int result = jtag->quit();
if (ERROR_OK != result)
LOG_ERROR("failed: %d", result);
return ERROR_OK;
}
-
-int jtag_init_reset(struct command_context_s *cmd_ctx)
+int swd_init_reset(struct command_context *cmd_ctx)
{
- int retval;
+ int retval = adapter_init(cmd_ctx);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_DEBUG("Initializing with hard SRST reset");
+
+ if (jtag_reset_config & RESET_HAS_SRST)
+ swd_add_reset(1);
+ swd_add_reset(0);
+ retval = jtag_execute_queue();
+ return retval;
+}
- if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
+int jtag_init_reset(struct command_context *cmd_ctx)
+{
+ int retval = adapter_init(cmd_ctx);
+ if (retval != ERROR_OK)
return retval;
- LOG_DEBUG("Trying to bring the JTAG controller to life by asserting TRST / TLR");
+ LOG_DEBUG("Initializing with hard TRST+SRST reset");
- /* Reset can happen after a power cycle.
+ /*
+ * This procedure is used by default when OpenOCD triggers a reset.
+ * It's now done through an overridable Tcl "init_reset" wrapper.
*
- * Ideally we would only assert TRST or run TLR before the target reset.
+ * This started out as a more powerful "get JTAG working" reset than
+ * jtag_init_inner(), applying TRST because some chips won't activate
+ * JTAG without a TRST cycle (presumed to be async, though some of
+ * those chips synchronize JTAG activation using TCK).
*
- * However w/srst_pulls_trst, trst is asserted together with the target
- * reset whether we want it or not.
+ * But some chips only activate JTAG as part of an SRST cycle; SRST
+ * got mixed in. So it became a hard reset routine, which got used
+ * in more places, and which coped with JTAG reset being forced as
+ * part of SRST (srst_pulls_trst).
*
- * NB! Some targets have JTAG circuitry disabled until a
- * trst & srst has been asserted.
+ * And even more corner cases started to surface: TRST and/or SRST
+ * assertion timings matter; some chips need other JTAG operations;
+ * TRST/SRST sequences can need to be different from these, etc.
*
- * NB! here we assume nsrst/ntrst delay are sufficient!
- *
- * NB! order matters!!!! srst *can* disconnect JTAG circuitry
+ * Systems should override that wrapper to support system-specific
+ * requirements that this not-fully-generic code doesn't handle.
*
+ * REVISIT once Tcl code can read the reset_config modes, this won't
+ * need to be a C routine at all...
*/
- jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
- if (jtag_reset_config & RESET_HAS_SRST)
- {
+ jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
+ if (jtag_reset_config & RESET_HAS_SRST) {
jtag_add_reset(1, 1);
if ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0)
jtag_add_reset(0, 1);
}
- jtag_add_reset(0, 0);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
+
+ /* some targets enable us to connect with srst asserted */
+ if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
+ if (jtag_reset_config & RESET_SRST_NO_GATING)
+ jtag_add_reset(0, 1);
+ else {
+ LOG_WARNING("\'srst_nogate\' reset_config option is required");
+ jtag_add_reset(0, 0);
+ }
+ } else
+ jtag_add_reset(0, 0);
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
return retval;
/* Check that we can communication on the JTAG chain + eventually we want to
return jtag_init_inner(cmd_ctx);
}
-int jtag_init(struct command_context_s *cmd_ctx)
+int jtag_init(struct command_context *cmd_ctx)
{
- int retval;
- if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
+ int retval = adapter_init(cmd_ctx);
+ if (retval != ERROR_OK)
return retval;
- if (jtag_init_inner(cmd_ctx) == ERROR_OK)
- {
- return ERROR_OK;
+
+ /* guard against oddball hardware: force resets to be inactive */
+ jtag_add_reset(0, 0);
+
+ /* some targets enable us to connect with srst asserted */
+ if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
+ if (jtag_reset_config & RESET_SRST_NO_GATING)
+ jtag_add_reset(0, 1);
+ else
+ LOG_WARNING("\'srst_nogate\' reset_config option is required");
}
- return jtag_init_reset(cmd_ctx);
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (Jim_Eval_Named(cmd_ctx->interp, "jtag_init", __FILE__, __LINE__) != JIM_OK)
+ return ERROR_FAIL;
+
+ return ERROR_OK;
}
unsigned jtag_get_speed_khz(void)
return speed_khz;
}
-static int jtag_khz_to_speed(unsigned khz, int* speed)
+static int adapter_khz_to_speed(unsigned khz, int *speed)
{
LOG_DEBUG("convert khz to interface specific speed value");
speed_khz = khz;
- if (jtag != NULL)
- {
+ if (jtag != NULL) {
LOG_DEBUG("have interface set up");
int speed_div1;
int retval = jtag->khz(jtag_get_speed_khz(), &speed_div1);
if (ERROR_OK != retval)
- {
return retval;
- }
*speed = speed_div1;
}
return ERROR_OK;
}
-static int jtag_rclk_to_speed(unsigned fallback_speed_khz, int* speed)
+static int jtag_rclk_to_speed(unsigned fallback_speed_khz, int *speed)
{
- int retval = jtag_khz_to_speed(0, speed);
- if ((ERROR_OK != retval) && fallback_speed_khz)
- {
+ int retval = adapter_khz_to_speed(0, speed);
+ if ((ERROR_OK != retval) && fallback_speed_khz) {
LOG_DEBUG("trying fallback speed...");
- retval = jtag_khz_to_speed(fallback_speed_khz, speed);
+ retval = adapter_khz_to_speed(fallback_speed_khz, speed);
}
return retval;
}
return jtag ? jtag->speed(speed) : ERROR_OK;
}
-int jtag_config_speed(int speed)
-{
- LOG_DEBUG("handle jtag speed");
- clock_mode = CLOCK_MODE_SPEED;
- return jtag_set_speed(speed);
-}
-
int jtag_config_khz(unsigned khz)
{
LOG_DEBUG("handle jtag khz");
clock_mode = CLOCK_MODE_KHZ;
int speed = 0;
- int retval = jtag_khz_to_speed(khz, &speed);
+ int retval = adapter_khz_to_speed(khz, &speed);
return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
}
return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
}
-int jtag_get_speed(void)
+int jtag_get_speed(int *speed)
{
- int speed;
- switch(clock_mode)
- {
- case CLOCK_MODE_SPEED:
- speed = jtag_speed;
- break;
+ switch (clock_mode) {
case CLOCK_MODE_KHZ:
- jtag_khz_to_speed(jtag_get_speed_khz(), &speed);
+ adapter_khz_to_speed(jtag_get_speed_khz(), speed);
break;
case CLOCK_MODE_RCLK:
- jtag_rclk_to_speed(rclk_fallback_speed_khz, &speed);
+ jtag_rclk_to_speed(rclk_fallback_speed_khz, speed);
break;
default:
LOG_ERROR("BUG: unknown jtag clock mode");
- speed = 0;
- break;
+ return ERROR_FAIL;
}
- return speed;
+ return ERROR_OK;
}
int jtag_get_speed_readable(int *khz)
{
- return jtag ? jtag->speed_div(jtag_get_speed(), khz) : ERROR_OK;
+ int jtag_speed_var = 0;
+ int retval = jtag_get_speed(&jtag_speed_var);
+ if (retval != ERROR_OK)
+ return retval;
+ return jtag ? jtag->speed_div(jtag_speed_var, khz) : ERROR_OK;
}
void jtag_set_verify(bool enable)
int jtag_power_dropout(int *dropout)
{
+ if (jtag == NULL) {
+ /* TODO: as the jtag interface is not valid all
+ * we can do at the moment is exit OpenOCD */
+ LOG_ERROR("No Valid JTAG Interface Configured.");
+ exit(-1);
+ }
return jtag->power_dropout(dropout);
}
void jtag_set_nsrst_delay(unsigned delay)
{
- jtag_nsrst_delay = delay;
+ adapter_nsrst_delay = delay;
}
unsigned jtag_get_nsrst_delay(void)
{
- return jtag_nsrst_delay;
+ return adapter_nsrst_delay;
}
void jtag_set_ntrst_delay(unsigned delay)
{
{
return jtag_ntrst_delay;
}
+
+
+void jtag_set_nsrst_assert_width(unsigned delay)
+{
+ adapter_nsrst_assert_width = delay;
+}
+unsigned jtag_get_nsrst_assert_width(void)
+{
+ return adapter_nsrst_assert_width;
+}
+void jtag_set_ntrst_assert_width(unsigned delay)
+{
+ jtag_ntrst_assert_width = delay;
+}
+unsigned jtag_get_ntrst_assert_width(void)
+{
+ return jtag_ntrst_assert_width;
+}
+
+static int jtag_select(struct command_context *ctx)
+{
+ int retval;
+
+ /* NOTE: interface init must already have been done.
+ * That works with only C code ... no Tcl glue required.
+ */
+
+ retval = jtag_register_commands(ctx);
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = svf_register_commands(ctx);
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ return xsvf_register_commands(ctx);
+}
+
+static struct transport jtag_transport = {
+ .name = "jtag",
+ .select = jtag_select,
+ .init = jtag_init,
+};
+
+static void jtag_constructor(void) __attribute__((constructor));
+static void jtag_constructor(void)
+{
+ transport_register(&jtag_transport);
+}
+
+/** Returns true if the current debug session
+ * is using JTAG as its transport.
+ */
+bool transport_is_jtag(void)
+{
+ return get_current_transport() == &jtag_transport;
+}
+
+void adapter_assert_reset(void)
+{
+ if (transport_is_jtag()) {
+ if (jtag_reset_config & RESET_SRST_PULLS_TRST)
+ jtag_add_reset(1, 1);
+ else
+ jtag_add_reset(0, 1);
+ } else if (transport_is_swd())
+ swd_add_reset(1);
+ else if (get_current_transport() != NULL)
+ LOG_ERROR("reset is not supported on %s",
+ get_current_transport()->name);
+ else
+ LOG_ERROR("transport is not selected");
+}
+
+void adapter_deassert_reset(void)
+{
+ if (transport_is_jtag())
+ jtag_add_reset(0, 0);
+ else if (transport_is_swd())
+ swd_add_reset(0);
+ else if (get_current_transport() != NULL)
+ LOG_ERROR("reset is not supported on %s",
+ get_current_transport()->name);
+ else
+ LOG_ERROR("transport is not selected");
+}
Code Review / openocd.git / blobdiff