0c4b119d3f
- Shrink messaging during resets, primarily by getting rid of "nothing happened" noise that hides *useful* information. - Improve: the "no IDCODE" message by identifying which tap only supports BYPASS; and the TAP event strings. Related minor code updates: - Remove two needless tests when examining the chain: we know we have a TAP, and that all TAPs have names. - Clean up two loops, turning "while"s into "for"s which better show what's actually being done. git-svn-id: svn://svn.berlios.de/openocd/trunk@2736 b42882b7-edfa-0310-969c-e2dbd0fdcd60
1452 lines
36 KiB
C
1452 lines
36 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2005 by Dominic Rath *
|
|
* Dominic.Rath@gmx.de *
|
|
* *
|
|
* Copyright (C) 2007,2008 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 *
|
|
* *
|
|
* 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 *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* This program is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU General Public License for more details. *
|
|
* *
|
|
* 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. *
|
|
***************************************************************************/
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "jtag.h"
|
|
#include "minidriver.h"
|
|
#include "interface.h"
|
|
|
|
#ifdef HAVE_STRINGS_H
|
|
#include <strings.h>
|
|
#endif
|
|
|
|
|
|
/// 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);
|
|
|
|
/**
|
|
* The jtag_error variable is set when an error occurs while executing
|
|
* the queue. Application code may set this using jtag_set_error(),
|
|
* 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().
|
|
*/
|
|
static int jtag_error = ERROR_OK;
|
|
|
|
static const char *jtag_event_strings[] =
|
|
{
|
|
[JTAG_TRST_ASSERTED] = "TAP reset",
|
|
[JTAG_TAP_EVENT_ENABLE] = "TAP enabled",
|
|
[JTAG_TAP_EVENT_POST_RESET] = "TAP 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*)
|
|
*/
|
|
static int jtag_trst = 0;
|
|
static int jtag_srst = 0;
|
|
|
|
/**
|
|
* List all TAPs that have been created.
|
|
*/
|
|
static jtag_tap_t *__jtag_all_taps = NULL;
|
|
/**
|
|
* 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 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 */
|
|
|
|
typedef struct jtag_event_callback_s
|
|
{
|
|
jtag_event_handler_t callback;
|
|
void* priv;
|
|
struct jtag_event_callback_s* next;
|
|
} jtag_event_callback_t;
|
|
|
|
/* callbacks to inform high-level handlers about JTAG state changes */
|
|
static jtag_event_callback_t *jtag_event_callbacks;
|
|
|
|
/* speed in kHz*/
|
|
static int speed_khz = 0;
|
|
/* 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 struct jtag_interface_s *jtag = NULL;
|
|
|
|
/* configuration */
|
|
jtag_interface_t *jtag_interface = NULL;
|
|
|
|
void jtag_set_error(int error)
|
|
{
|
|
if ((error == ERROR_OK) || (jtag_error != ERROR_OK))
|
|
return;
|
|
jtag_error = error;
|
|
}
|
|
int jtag_get_error(void)
|
|
{
|
|
return jtag_error;
|
|
}
|
|
int jtag_error_clear(void)
|
|
{
|
|
int temp = jtag_error;
|
|
jtag_error = ERROR_OK;
|
|
return temp;
|
|
}
|
|
|
|
|
|
jtag_tap_t *jtag_all_taps(void)
|
|
{
|
|
return __jtag_all_taps;
|
|
};
|
|
|
|
unsigned jtag_tap_count(void)
|
|
{
|
|
return jtag_num_taps;
|
|
}
|
|
|
|
unsigned jtag_tap_count_enabled(void)
|
|
{
|
|
jtag_tap_t *t = jtag_all_taps();
|
|
unsigned n = 0;
|
|
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)
|
|
{
|
|
t->abs_chain_position = jtag_num_taps++;
|
|
|
|
jtag_tap_t **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)
|
|
{
|
|
jtag_tap_t *t = jtag_all_taps();
|
|
|
|
while (t && n-- > 0)
|
|
t = t->next_tap;
|
|
|
|
return t;
|
|
}
|
|
|
|
jtag_tap_t *jtag_tap_by_string(const char *s)
|
|
{
|
|
/* try by name first */
|
|
jtag_tap_t *t = jtag_all_taps();
|
|
|
|
while (t)
|
|
{
|
|
if (0 == strcmp(t->dotted_name, s))
|
|
return t;
|
|
t = t->next_tap;
|
|
}
|
|
|
|
/* no tap found by name, so try to parse the name as a number */
|
|
unsigned n;
|
|
if (parse_uint(s, &n) != ERROR_OK)
|
|
return NULL;
|
|
|
|
/* FIXME remove this numeric fallback code late June 2010, along
|
|
* with all info in the User's Guide that TAPs have numeric IDs.
|
|
* Also update "scan_chain" output to not display the numbers.
|
|
*/
|
|
t = jtag_tap_by_position(n);
|
|
if (t)
|
|
LOG_WARNING("Specify TAP '%s' by name, not number %u",
|
|
t->dotted_name, n);
|
|
|
|
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)
|
|
{
|
|
p = p ? p->next_tap : jtag_all_taps();
|
|
while (p)
|
|
{
|
|
if (p->enabled)
|
|
return p;
|
|
p = p->next_tap;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const char *jtag_tap_name(const jtag_tap_t *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;
|
|
|
|
if (callback == NULL)
|
|
{
|
|
return ERROR_INVALID_ARGUMENTS;
|
|
}
|
|
|
|
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)->callback = callback;
|
|
(*callbacks_p)->priv = priv;
|
|
(*callbacks_p)->next = NULL;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
int jtag_unregister_event_callback(jtag_event_handler_t callback, void *priv)
|
|
{
|
|
jtag_event_callback_t **callbacks_p;
|
|
jtag_event_callback_t **next;
|
|
|
|
if (callback == NULL)
|
|
{
|
|
return ERROR_INVALID_ARGUMENTS;
|
|
}
|
|
|
|
for (callbacks_p = &jtag_event_callbacks;
|
|
*callbacks_p != NULL;
|
|
callbacks_p = next)
|
|
{
|
|
next = &((*callbacks_p)->next);
|
|
|
|
if ((*callbacks_p)->priv != priv)
|
|
continue;
|
|
|
|
if ((*callbacks_p)->callback == callback)
|
|
{
|
|
free(*callbacks_p);
|
|
*callbacks_p = *next;
|
|
}
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
int jtag_call_event_callbacks(enum jtag_event event)
|
|
{
|
|
jtag_event_callback_t *callback = jtag_event_callbacks;
|
|
|
|
LOG_DEBUG("jtag event: %s", jtag_event_strings[event]);
|
|
|
|
while (callback)
|
|
{
|
|
jtag_event_callback_t *next;
|
|
|
|
/* callback may remove itself */
|
|
next = callback->next;
|
|
callback->callback(event, callback->priv);
|
|
callback = next;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static void jtag_checks(void)
|
|
{
|
|
assert(jtag_trst == 0);
|
|
}
|
|
|
|
static void jtag_prelude(tap_state_t state)
|
|
{
|
|
jtag_checks();
|
|
|
|
assert(state != TAP_INVALID);
|
|
|
|
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)
|
|
{
|
|
jtag_prelude(state);
|
|
|
|
int retval = interface_jtag_add_ir_scan(in_count, in_fields, state);
|
|
jtag_set_error(retval);
|
|
}
|
|
|
|
|
|
void jtag_add_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state)
|
|
{
|
|
assert(state != TAP_RESET);
|
|
|
|
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);
|
|
} else
|
|
{
|
|
jtag_add_ir_scan_noverify(in_num_fields, in_fields, state);
|
|
}
|
|
}
|
|
|
|
void jtag_add_plain_ir_scan(int in_num_fields, const scan_field_t *in_fields,
|
|
tap_state_t state)
|
|
{
|
|
assert(state != TAP_RESET);
|
|
|
|
jtag_prelude(state);
|
|
|
|
int retval = interface_jtag_add_plain_ir_scan(
|
|
in_num_fields, in_fields, 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);
|
|
|
|
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);
|
|
}
|
|
|
|
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)
|
|
{
|
|
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);
|
|
|
|
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_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)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
void jtag_add_dr_scan(int in_num_fields, const scan_field_t *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);
|
|
jtag_set_error(retval);
|
|
}
|
|
|
|
void jtag_add_plain_dr_scan(int in_num_fields, const scan_field_t *in_fields,
|
|
tap_state_t state)
|
|
{
|
|
assert(state != TAP_RESET);
|
|
|
|
jtag_prelude(state);
|
|
|
|
int retval;
|
|
retval = interface_jtag_add_plain_dr_scan(in_num_fields, in_fields, 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);
|
|
jtag_set_error(interface_jtag_add_tlr());
|
|
|
|
/* NOTE: order here matches TRST path in jtag_add_reset() */
|
|
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
|
|
jtag_notify_reset();
|
|
}
|
|
|
|
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]))
|
|
{
|
|
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)
|
|
{
|
|
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])
|
|
{
|
|
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
|
|
tap_state_name(cur_state), tap_state_name(path[i]));
|
|
jtag_set_error(ERROR_JTAG_TRANSITION_INVALID);
|
|
return;
|
|
}
|
|
cur_state = path[i];
|
|
}
|
|
|
|
jtag_checks();
|
|
|
|
jtag_set_error(interface_jtag_add_pathmove(num_states, path));
|
|
cmd_queue_cur_state = path[num_states - 1];
|
|
}
|
|
|
|
int jtag_add_statemove(tap_state_t goal_state)
|
|
{
|
|
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)
|
|
; /* nothing to do */
|
|
else if (goal_state == TAP_RESET)
|
|
{
|
|
jtag_add_tlr();
|
|
}
|
|
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));
|
|
|
|
for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1)
|
|
{
|
|
bool bit = tms_bits & 1;
|
|
|
|
cur_state = tap_state_transition(cur_state, bit);
|
|
moves[i] = cur_state;
|
|
}
|
|
|
|
jtag_add_pathmove(tms_count, moves);
|
|
}
|
|
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;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
void jtag_add_runtest(int num_cycles, tap_state_t state)
|
|
{
|
|
jtag_prelude(state);
|
|
jtag_set_error(interface_jtag_add_runtest(num_cycles, state));
|
|
}
|
|
|
|
|
|
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 (num_cycles > 0)
|
|
{
|
|
jtag_checks();
|
|
jtag_set_error(interface_jtag_add_clocks(num_cycles));
|
|
}
|
|
}
|
|
|
|
void jtag_add_reset(int req_tlr_or_trst, int req_srst)
|
|
{
|
|
int trst_with_tlr = 0;
|
|
int new_srst = 0;
|
|
int new_trst = 0;
|
|
|
|
/* Without SRST, we must use target-specific JTAG operations
|
|
* on each target; callers should not be requesting SRST when
|
|
* that signal doesn't exist.
|
|
*
|
|
* RESET_SRST_PULLS_TRST is a board or chip level quirk, which
|
|
* can kick in even if the JTAG adapter can't drive TRST.
|
|
*/
|
|
if (req_srst) {
|
|
if (!(jtag_reset_config & RESET_HAS_SRST)) {
|
|
LOG_ERROR("BUG: can't assert SRST");
|
|
jtag_set_error(ERROR_FAIL);
|
|
return;
|
|
}
|
|
if ((jtag_reset_config & RESET_SRST_PULLS_TRST) != 0
|
|
&& !req_tlr_or_trst) {
|
|
LOG_ERROR("BUG: can't assert only SRST");
|
|
jtag_set_error(ERROR_FAIL);
|
|
return;
|
|
}
|
|
new_srst = 1;
|
|
}
|
|
|
|
/* JTAG reset (entry to TAP_RESET state) can always be achieved
|
|
* using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
|
|
* state first. TRST accelerates it, and bypasses those states.
|
|
*
|
|
* RESET_TRST_PULLS_SRST is a board or chip level quirk, which
|
|
* can kick in even if the JTAG adapter can't drive SRST.
|
|
*/
|
|
if (req_tlr_or_trst) {
|
|
if (!(jtag_reset_config & RESET_HAS_TRST))
|
|
trst_with_tlr = 1;
|
|
else if ((jtag_reset_config & RESET_TRST_PULLS_SRST) != 0
|
|
&& !req_srst)
|
|
trst_with_tlr = 1;
|
|
else
|
|
new_trst = 1;
|
|
}
|
|
|
|
/* Maybe change TRST and/or SRST signal state */
|
|
if (jtag_srst != new_srst || jtag_trst != new_trst) {
|
|
int retval;
|
|
|
|
retval = interface_jtag_add_reset(new_trst, new_srst);
|
|
if (retval != ERROR_OK)
|
|
jtag_set_error(retval);
|
|
else
|
|
retval = jtag_execute_queue();
|
|
|
|
if (retval != ERROR_OK) {
|
|
LOG_ERROR("TRST/SRST error %d", retval);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* SRST resets everything hooked up to that signal */
|
|
if (jtag_srst != new_srst) {
|
|
jtag_srst = new_srst;
|
|
if (jtag_srst)
|
|
LOG_DEBUG("SRST line asserted");
|
|
else {
|
|
LOG_DEBUG("SRST line released");
|
|
if (jtag_nsrst_delay)
|
|
jtag_add_sleep(jtag_nsrst_delay * 1000);
|
|
}
|
|
}
|
|
|
|
/* Maybe enter the JTAG TAP_RESET state ...
|
|
* - using only TMS, TCK, and the JTAG state machine
|
|
* - or else more directly, using TRST
|
|
*
|
|
* TAP_RESET should be invisible to non-debug parts of the system.
|
|
*/
|
|
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) {
|
|
jtag_trst = new_trst;
|
|
if (jtag_trst) {
|
|
LOG_DEBUG("TRST line asserted");
|
|
tap_set_state(TAP_RESET);
|
|
} else {
|
|
LOG_DEBUG("TRST line released");
|
|
if (jtag_ntrst_delay)
|
|
jtag_add_sleep(jtag_ntrst_delay * 1000);
|
|
|
|
/* We just asserted nTRST, so we're now in TAP_RESET.
|
|
* Inform possible listeners about this, now that
|
|
* JTAG instructions and data can be shifted. This
|
|
* sequence must match jtag_add_tlr().
|
|
*/
|
|
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
|
|
jtag_notify_reset();
|
|
}
|
|
}
|
|
}
|
|
|
|
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!!!
|
|
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)
|
|
{
|
|
int retval = ERROR_OK;
|
|
|
|
int compare_failed = 0;
|
|
|
|
if (in_check_mask)
|
|
compare_failed = buf_cmp_mask(captured, in_check_value, in_check_mask, num_bits);
|
|
else
|
|
compare_failed = buf_cmp(captured, in_check_value, num_bits);
|
|
|
|
if (compare_failed) {
|
|
char *captured_str, *in_check_value_str;
|
|
int bits = (num_bits > DEBUG_JTAG_IOZ)
|
|
? DEBUG_JTAG_IOZ
|
|
: num_bits;
|
|
|
|
/* NOTE: we've lost diagnostic context here -- 'which tap' */
|
|
|
|
captured_str = buf_to_str(captured, bits, 16);
|
|
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);
|
|
LOG_WARNING(" check_value: 0x%s", in_check_value_str);
|
|
|
|
free(captured_str);
|
|
free(in_check_value_str);
|
|
|
|
if (in_check_mask) {
|
|
char *in_check_mask_str;
|
|
|
|
in_check_mask_str = buf_to_str(in_check_mask, bits, 16);
|
|
LOG_WARNING(" check_mask: 0x%s", in_check_mask_str);
|
|
free(in_check_mask_str);
|
|
}
|
|
|
|
retval = ERROR_JTAG_QUEUE_FAILED;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
void jtag_check_value_mask(scan_field_t *field, uint8_t *value, uint8_t *mask)
|
|
{
|
|
assert(field->in_value != NULL);
|
|
|
|
if (value == NULL)
|
|
{
|
|
/* no checking to do */
|
|
return;
|
|
}
|
|
|
|
jtag_execute_queue_noclear();
|
|
|
|
int retval = jtag_check_value_inner(field->in_value, value, mask, field->num_bits);
|
|
jtag_set_error(retval);
|
|
}
|
|
|
|
|
|
|
|
int default_interface_jtag_execute_queue(void)
|
|
{
|
|
if (NULL == jtag)
|
|
{
|
|
LOG_ERROR("No JTAG interface configured yet. "
|
|
"Issue 'init' command in startup scripts "
|
|
"before communicating with targets.");
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
return jtag->execute_queue();
|
|
}
|
|
|
|
void jtag_execute_queue_noclear(void)
|
|
{
|
|
jtag_flush_queue_count++;
|
|
jtag_set_error(interface_jtag_execute_queue());
|
|
}
|
|
|
|
int jtag_get_flush_queue_count(void)
|
|
{
|
|
return jtag_flush_queue_count;
|
|
}
|
|
|
|
int jtag_execute_queue(void)
|
|
{
|
|
jtag_execute_queue_noclear();
|
|
return jtag_error_clear();
|
|
}
|
|
|
|
static int jtag_reset_callback(enum jtag_event event, void *priv)
|
|
{
|
|
jtag_tap_t *tap = priv;
|
|
|
|
if (event == JTAG_TRST_ASSERTED)
|
|
{
|
|
tap->enabled = !tap->disabled_after_reset;
|
|
|
|
/* current instruction is either BYPASS or IDCODE */
|
|
buf_set_ones(tap->cur_instr, tap->ir_length);
|
|
tap->bypass = 1;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
void jtag_sleep(uint32_t us)
|
|
{
|
|
alive_sleep(us/1000);
|
|
}
|
|
|
|
/// maximum number of JTAG devices expected in the chain
|
|
#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)
|
|
|
|
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,
|
|
};
|
|
|
|
// 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);
|
|
|
|
jtag_add_plain_dr_scan(1, &field, TAP_DRPAUSE);
|
|
jtag_add_tlr();
|
|
return jtag_execute_queue();
|
|
}
|
|
|
|
static bool jtag_examine_chain_check(uint8_t *idcodes, unsigned count)
|
|
{
|
|
uint8_t zero_check = 0x0;
|
|
uint8_t one_check = 0xff;
|
|
|
|
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.");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void jtag_examine_chain_display(enum log_levels level, const char *msg,
|
|
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));
|
|
}
|
|
|
|
static bool jtag_idcode_is_final(uint32_t idcode)
|
|
{
|
|
return idcode == 0x000000FF || idcode == 0xFFFFFFFF;
|
|
}
|
|
|
|
/**
|
|
* This helper checks that remaining bits in the examined chain data are
|
|
* 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.
|
|
*/
|
|
static void jtag_examine_chain_end(uint8_t *idcodes, unsigned count, unsigned max)
|
|
{
|
|
bool triggered = false;
|
|
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))
|
|
continue;
|
|
LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
|
|
count, (unsigned int)idcode);
|
|
triggered = true;
|
|
}
|
|
}
|
|
|
|
static bool jtag_examine_chain_match_tap(const struct jtag_tap_s *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
|
|
return true;
|
|
}
|
|
|
|
/* 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])
|
|
return true;
|
|
}
|
|
|
|
/* If none of the expected ids matched, log an error */
|
|
jtag_examine_chain_display(LOG_LVL_ERROR, "got",
|
|
tap->dotted_name, tap->idcode);
|
|
for (ii = 0; ii < tap->expected_ids_cnt; ii++)
|
|
{
|
|
char msg[32];
|
|
snprintf(msg, sizeof(msg), "expected %hhu of %hhu",
|
|
ii + 1, tap->expected_ids_cnt);
|
|
jtag_examine_chain_display(LOG_LVL_ERROR, msg,
|
|
tap->dotted_name, tap->expected_ids[ii]);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Try to examine chain layout according to IEEE 1149.1 §12
|
|
*/
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
for (unsigned 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 %s does not have IDCODE",
|
|
tap->dotted_name);
|
|
idcode = 0;
|
|
tap->hasidcode = false;
|
|
|
|
bit_count += 1;
|
|
}
|
|
else
|
|
{
|
|
tap->hasidcode = true;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
jtag_examine_chain_display(LOG_LVL_INFO, "tap/device found",
|
|
tap->dotted_name, idcode);
|
|
|
|
bit_count += 32;
|
|
}
|
|
device_count++;
|
|
tap->idcode = idcode;
|
|
|
|
// ensure the TAP ID does matches what was expected
|
|
if (!jtag_examine_chain_match_tap(tap))
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
/* 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, ...)");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
int jtag_validate_chain(void)
|
|
{
|
|
jtag_tap_t *tap;
|
|
int total_ir_length = 0;
|
|
uint8_t *ir_test = NULL;
|
|
scan_field_t field;
|
|
int chain_pos = 0;
|
|
|
|
tap = NULL;
|
|
total_ir_length = 0;
|
|
for (;;) {
|
|
tap = jtag_tap_next_enabled(tap);
|
|
if (tap == NULL) {
|
|
break;
|
|
}
|
|
total_ir_length += tap->ir_length;
|
|
}
|
|
|
|
total_ir_length += 2;
|
|
ir_test = malloc(CEIL(total_ir_length, 8));
|
|
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(1, &field, TAP_IRPAUSE);
|
|
jtag_add_tlr();
|
|
|
|
int retval;
|
|
retval = jtag_execute_queue();
|
|
if (retval != ERROR_OK)
|
|
return retval;
|
|
|
|
tap = NULL;
|
|
chain_pos = 0;
|
|
int val;
|
|
for (;;) {
|
|
tap = jtag_tap_next_enabled(tap);
|
|
if (tap == NULL) {
|
|
break;
|
|
}
|
|
|
|
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;
|
|
}
|
|
chain_pos += tap->ir_length;
|
|
}
|
|
|
|
val = buf_get_u32(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);
|
|
free(cbuf);
|
|
free(ir_test);
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
free(ir_test);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
|
|
void jtag_tap_init(jtag_tap_t *tap)
|
|
{
|
|
assert(0 != tap->ir_length);
|
|
|
|
tap->expected = malloc(tap->ir_length);
|
|
tap->expected_mask = malloc(tap->ir_length);
|
|
tap->cur_instr = malloc(tap->ir_length);
|
|
|
|
/// @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);
|
|
|
|
// place TAP in bypass mode
|
|
tap->bypass = 1;
|
|
// register the reset callback for the TAP
|
|
jtag_register_event_callback(&jtag_reset_callback, 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);
|
|
}
|
|
|
|
void jtag_tap_free(jtag_tap_t *tap)
|
|
{
|
|
jtag_unregister_event_callback(&jtag_reset_callback, tap);
|
|
|
|
/// @todo is anything missing? no memory leaks please
|
|
free((void *)tap->expected_ids);
|
|
free((void *)tap->chip);
|
|
free((void *)tap->tapname);
|
|
free((void *)tap->dotted_name);
|
|
free(tap);
|
|
}
|
|
|
|
int jtag_interface_init(struct command_context_s *cmd_ctx)
|
|
{
|
|
if (jtag)
|
|
return ERROR_OK;
|
|
|
|
if (!jtag_interface)
|
|
{
|
|
/* nothing was previously specified by "interface" command */
|
|
LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
|
|
return ERROR_JTAG_INVALID_INTERFACE;
|
|
}
|
|
|
|
jtag = jtag_interface;
|
|
if (jtag_interface->init() != ERROR_OK)
|
|
{
|
|
jtag = NULL;
|
|
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);
|
|
if (ERROR_OK != retval)
|
|
LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
|
|
else if (actual_khz)
|
|
{
|
|
if ((CLOCK_MODE_RCLK == clock_mode)
|
|
|| ((CLOCK_MODE_KHZ == clock_mode) && !requested_khz))
|
|
{
|
|
LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
|
|
, actual_khz);
|
|
}
|
|
else
|
|
LOG_INFO("clock speed %d kHz", actual_khz);
|
|
}
|
|
else
|
|
LOG_INFO("RCLK (adaptive clock speed)");
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int jtag_init_inner(struct command_context_s *cmd_ctx)
|
|
{
|
|
jtag_tap_t *tap;
|
|
int retval;
|
|
|
|
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;
|
|
}
|
|
|
|
jtag_add_tlr();
|
|
if ((retval = jtag_execute_queue()) != 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...");
|
|
}
|
|
|
|
if (jtag_validate_chain() != ERROR_OK)
|
|
{
|
|
LOG_WARNING("Could not validate JTAG chain, continuing anyway...");
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
int jtag_interface_quit(void)
|
|
{
|
|
if (!jtag || !jtag->quit)
|
|
return ERROR_OK;
|
|
|
|
// 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 retval;
|
|
|
|
if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
|
|
return retval;
|
|
|
|
LOG_DEBUG("Trying to bring the JTAG controller to life by asserting TRST / TLR");
|
|
|
|
/* Reset can happen after a power cycle.
|
|
*
|
|
* Ideally we would only assert TRST or run TLR before the target reset.
|
|
*
|
|
* However w/srst_pulls_trst, trst is asserted together with the target
|
|
* reset whether we want it or not.
|
|
*
|
|
* NB! Some targets have JTAG circuitry disabled until a
|
|
* trst & srst has been asserted.
|
|
*
|
|
* NB! here we assume nsrst/ntrst delay are sufficient!
|
|
*
|
|
* NB! order matters!!!! srst *can* disconnect JTAG circuitry
|
|
*
|
|
*/
|
|
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)
|
|
return retval;
|
|
|
|
/* Check that we can communication on the JTAG chain + eventually we want to
|
|
* be able to perform enumeration only after OpenOCD has started
|
|
* telnet and GDB server
|
|
*
|
|
* That would allow users to more easily perform any magic they need to before
|
|
* reset happens.
|
|
*/
|
|
return jtag_init_inner(cmd_ctx);
|
|
}
|
|
|
|
int jtag_init(struct command_context_s *cmd_ctx)
|
|
{
|
|
int retval;
|
|
if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
|
|
return retval;
|
|
if (jtag_init_inner(cmd_ctx) == ERROR_OK)
|
|
{
|
|
return ERROR_OK;
|
|
}
|
|
return jtag_init_reset(cmd_ctx);
|
|
}
|
|
|
|
unsigned jtag_get_speed_khz(void)
|
|
{
|
|
return speed_khz;
|
|
}
|
|
|
|
static int jtag_khz_to_speed(unsigned khz, int* speed)
|
|
{
|
|
LOG_DEBUG("convert khz to interface specific speed value");
|
|
speed_khz = khz;
|
|
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)
|
|
{
|
|
int retval = jtag_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);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int jtag_set_speed(int speed)
|
|
{
|
|
jtag_speed = speed;
|
|
/* this command can be called during CONFIG,
|
|
* in which case jtag isn't initialized */
|
|
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);
|
|
return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
|
|
}
|
|
|
|
int jtag_config_rclk(unsigned fallback_speed_khz)
|
|
{
|
|
LOG_DEBUG("handle jtag rclk");
|
|
clock_mode = CLOCK_MODE_RCLK;
|
|
rclk_fallback_speed_khz = fallback_speed_khz;
|
|
int speed = 0;
|
|
int retval = jtag_rclk_to_speed(fallback_speed_khz, &speed);
|
|
return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
|
|
}
|
|
|
|
int jtag_get_speed(void)
|
|
{
|
|
int speed;
|
|
switch(clock_mode)
|
|
{
|
|
case CLOCK_MODE_SPEED:
|
|
speed = jtag_speed;
|
|
break;
|
|
case CLOCK_MODE_KHZ:
|
|
jtag_khz_to_speed(jtag_get_speed_khz(), &speed);
|
|
break;
|
|
case CLOCK_MODE_RCLK:
|
|
jtag_rclk_to_speed(rclk_fallback_speed_khz, &speed);
|
|
break;
|
|
default:
|
|
LOG_ERROR("BUG: unknown jtag clock mode");
|
|
speed = 0;
|
|
break;
|
|
}
|
|
return speed;
|
|
}
|
|
|
|
int jtag_get_speed_readable(int *khz)
|
|
{
|
|
return jtag ? jtag->speed_div(jtag_get_speed(), khz) : ERROR_OK;
|
|
}
|
|
|
|
void jtag_set_verify(bool enable)
|
|
{
|
|
jtag_verify = enable;
|
|
}
|
|
|
|
bool jtag_will_verify()
|
|
{
|
|
return jtag_verify;
|
|
}
|
|
|
|
void jtag_set_verify_capture_ir(bool enable)
|
|
{
|
|
jtag_verify_capture_ir = enable;
|
|
}
|
|
|
|
bool jtag_will_verify_capture_ir()
|
|
{
|
|
return jtag_verify_capture_ir;
|
|
}
|
|
|
|
int jtag_power_dropout(int *dropout)
|
|
{
|
|
return jtag->power_dropout(dropout);
|
|
}
|
|
|
|
int jtag_srst_asserted(int *srst_asserted)
|
|
{
|
|
return jtag->srst_asserted(srst_asserted);
|
|
}
|
|
|
|
enum reset_types jtag_get_reset_config(void)
|
|
{
|
|
return jtag_reset_config;
|
|
}
|
|
void jtag_set_reset_config(enum reset_types type)
|
|
{
|
|
jtag_reset_config = type;
|
|
}
|
|
|
|
int jtag_get_trst(void)
|
|
{
|
|
return jtag_trst;
|
|
}
|
|
int jtag_get_srst(void)
|
|
{
|
|
return jtag_srst;
|
|
}
|
|
|
|
void jtag_set_nsrst_delay(unsigned delay)
|
|
{
|
|
jtag_nsrst_delay = delay;
|
|
}
|
|
unsigned jtag_get_nsrst_delay(void)
|
|
{
|
|
return jtag_nsrst_delay;
|
|
}
|
|
void jtag_set_ntrst_delay(unsigned delay)
|
|
{
|
|
jtag_ntrst_delay = delay;
|
|
}
|
|
unsigned jtag_get_ntrst_delay(void)
|
|
{
|
|
return jtag_ntrst_delay;
|
|
}
|