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Commit 66707c94 authored by zwelch's avatar zwelch
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Split main jtag.c file into two layers: 

- src/jtag/core.c: contains the low-level JTAG TAP and scanning routines.
- src/jtag/tcl.c: contains high-level JTAG TCL commands that use the core.
- Remove static keywords from routines in core.c, extern from tcl.c:
  - jtag, jtag_interface global variables
  - jtag_{examine,validate}_chain and jtag_tap_{init,free} functions
- Added myself to the copyright header in both of these files.
- Used 'svn cp' to add files, so versioning was preserved for both.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2149 b42882b7-edfa-0310-969c-e2dbd0fdcd60
parent 03b2b345
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src/jtag/Makefile.am
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View file @ 66707c94
......@@ -124,7 +124,8 @@ ARMJTAGEWFILES =
endif
libjtag_la_SOURCES = \
jtag.c \
core.c \
tcl.c \
interface.c \
$(DRIVERFILES) \
$(BITBANGFILES) \
......
src/jtag/core.c 0 → 100644
+ 1268
− 0
View file @ 66707c94
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 yvind 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);
/* note that this is not marked as static as it must be available from outside jtag.c for those
that implement the jtag_xxx() minidriver layer
*/
int jtag_error=ERROR_OK;
char* jtag_event_strings[] =
{
"JTAG controller reset (RESET or TRST)"
};
const Jim_Nvp nvp_jtag_tap_event[] = {
{ .value = JTAG_TAP_EVENT_ENABLE, .name = "tap-enable" },
{ .value = JTAG_TAP_EVENT_DISABLE, .name = "tap-disable" },
{ .name = NULL, .value = -1 }
};
int jtag_trst = 0;
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;
enum reset_types jtag_reset_config = RESET_NONE;
tap_state_t cmd_queue_end_state = TAP_RESET;
tap_state_t cmd_queue_cur_state = TAP_RESET;
int jtag_verify_capture_ir = 1;
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 */
/* callbacks to inform high-level handlers about JTAG state changes */
jtag_event_callback_t *jtag_event_callbacks;
/* speed in kHz*/
static int speed_khz = 0;
/* flag if the kHz speed was defined */
static bool hasKHz = false;
struct jtag_interface_s *jtag = NULL;
/* configuration */
jtag_interface_t *jtag_interface = NULL;
int jtag_speed = 0;
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;
}
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 */
char *cp;
unsigned n = strtoul(s, &cp, 0);
if ((s == cp) || (*cp != 0))
return NULL;
return jtag_tap_by_position(n);
}
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;
}
/* returns a pointer to the n-th device in the scan chain */
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;
}
const char *jtag_tap_name(const jtag_tap_t *tap)
{
return (tap == NULL) ? "(unknown)" : tap->dotted_name;
}
int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), 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(int (*callback)(enum jtag_event event, void *priv))
{
jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
if (callback == NULL)
{
return ERROR_INVALID_ARGUMENTS;
}
while (*callbacks_p)
{
jtag_event_callback_t **next = &((*callbacks_p)->next);
if ((*callbacks_p)->callback == callback)
{
free(*callbacks_p);
*callbacks_p = *next;
}
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)
{
callback->callback(event, callback->priv);
callback = 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)
{
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)
{
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, u8 *in)
{
interface_jtag_add_callback(f, in);
}
void jtag_add_callback4(jtag_callback_t f, u8 *in,
jtag_callback_data_t data1, jtag_callback_data_t data2,
jtag_callback_data_t data3)
{
interface_jtag_add_callback4(f, in, data1, data2, data3);
}
int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *in_check_mask, int num_bits);
static int jtag_check_value_mask_callback(u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
{
return jtag_check_value_inner(in, (u8 *)data1, (u8 *)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, 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)
{
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)
{
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 u32* value,
tap_state_t end_state)
{
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());
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
}
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];
}
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;
/* FIX!!! there are *many* different cases here. A better
* approach is needed for legal combinations of transitions...
*/
if ((jtag_reset_config & RESET_HAS_SRST)&&
(jtag_reset_config & RESET_HAS_TRST)&&
((jtag_reset_config & RESET_SRST_PULLS_TRST)==0))
{
if (((req_tlr_or_trst&&!jtag_trst)||
(!req_tlr_or_trst&&jtag_trst))&&
((req_srst&&!jtag_srst)||
(!req_srst&&jtag_srst)))
{
/* FIX!!! srst_pulls_trst allows 1,1 => 0,0 transition.... */
//LOG_ERROR("BUG: transition of req_tlr_or_trst and req_srst in the same jtag_add_reset() call is undefined");
}
}
/* Make sure that jtag_reset_config allows the requested reset */
/* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (!req_tlr_or_trst))
{
LOG_ERROR("BUG: requested reset would assert trst");
jtag_set_error(ERROR_FAIL);
return;
}
/* if TRST pulls SRST, we reset with TAP T-L-R */
if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_tlr_or_trst)) && (req_srst == 0))
{
trst_with_tlr = 1;
}
if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
{
LOG_ERROR("BUG: requested SRST assertion, but the current configuration doesn't support this");
jtag_set_error(ERROR_FAIL);
return;
}
if (req_tlr_or_trst)
{
if (!trst_with_tlr && (jtag_reset_config & RESET_HAS_TRST))
{
jtag_trst = 1;
} else
{
trst_with_tlr = 1;
}
} else
{
jtag_trst = 0;
}
jtag_srst = req_srst;
int retval = interface_jtag_add_reset(jtag_trst, jtag_srst);
if (retval != ERROR_OK)
{
jtag_set_error(retval);
return;
}
jtag_execute_queue();
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);
}
if (trst_with_tlr)
{
LOG_DEBUG("JTAG reset with RESET instead of TRST");
jtag_set_end_state(TAP_RESET);
jtag_add_tlr();
return;
}
if (jtag_trst)
{
/* we just asserted nTRST, so we're now in Test-Logic-Reset,
* and inform possible listeners about this
*/
LOG_DEBUG("TRST line asserted");
tap_set_state(TAP_RESET);
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
}
else
{
if (jtag_ntrst_delay)
jtag_add_sleep(jtag_ntrst_delay * 1000);
}
}
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(u32 us)
{
/// @todo Here, keep_alive() appears to be a layering violation!!!
keep_alive();
jtag_set_error(interface_jtag_add_sleep(us));
}
int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *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){
/* An error handler could have caught the failing check
* only report a problem when there wasn't a handler, or if the handler
* acknowledged the error
*/
/*
LOG_WARNING("TAP %s:",
jtag_tap_name(field->tap));
*/
if (compare_failed)
{
char *captured_char = buf_to_str(captured, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
char *in_check_value_char = buf_to_str(in_check_value, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
if (in_check_mask)
{
char *in_check_mask_char;
in_check_mask_char = buf_to_str(in_check_mask, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
LOG_WARNING("value captured during scan didn't pass the requested check:");
LOG_WARNING("captured: 0x%s check_value: 0x%s check_mask: 0x%s",
captured_char, in_check_value_char, in_check_mask_char);
free(in_check_mask_char);
}
else
{
LOG_WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
}
free(captured_char);
free(in_check_value_char);
retval = ERROR_JTAG_QUEUE_FAILED;
}
}
return retval;
}
void jtag_check_value_mask(scan_field_t *field, u8 *value, u8 *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;
LOG_DEBUG("-");
if (event == JTAG_TRST_ASSERTED)
{
buf_set_ones(tap->cur_instr, tap->ir_length);
tap->bypass = 1;
}
return ERROR_OK;
}
void jtag_sleep(u32 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(u8 *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_RESET);
return jtag_execute_queue();
}
static bool jtag_examine_chain_check(u8 *idcodes, unsigned count)
{
u8 zero_check = 0x0;
u8 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, u32 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, idcode,
EXTRACT_MFG(idcode), EXTRACT_PART(idcode), EXTRACT_VER(idcode) );
}
static bool jtag_idcode_is_final(u32 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(u8 *idcodes, unsigned count, unsigned max)
{
bool triggered = false;
for ( ; count < max - 31; count += 32)
{
u32 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, 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 */
u8 ii;
for (ii = 0; ii < tap->expected_ids_cnt; ii++)
{
if (tap->idcode == tap->expected_ids[ii])
break;
}
/* If none of the expected ids matched, log an error */
if (ii != tap->expected_ids_cnt)
{
LOG_INFO("JTAG Tap/device matched");
return true;
}
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
*/
int jtag_examine_chain(void)
{
u8 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; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
{
u32 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");
idcode = 0;
bit_count += 1;
}
else
{
/*
* 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 ? tap->dotted_name : "(not-named)",
idcode);
bit_count += 32;
}
device_count++;
if (!tap)
continue;
tap->idcode = idcode;
// ensure the TAP ID does matches what was expected
if (!jtag_examine_chain_match_tap(tap))
return ERROR_JTAG_INIT_FAILED;
tap = jtag_tap_next_enabled(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, ...)");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int jtag_validate_chain(void)
{
jtag_tap_t *tap;
int total_ir_length = 0;
u8 *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_RESET);
jtag_execute_queue();
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);
if (val != 0x1)
{
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);
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,
tap->ir_capture_value, tap->ir_capture_mask);
jtag_tap_add(tap);
}
void jtag_tap_free(jtag_tap_t *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;
}
if(hasKHz)
{
jtag_interface->khz(jtag_get_speed_khz(), &jtag_speed);
hasKHz = false;
}
if (jtag_interface->init() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
jtag = jtag_interface;
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 / RESET");
/* Reset can happen after a power cycle.
*
* Ideally we would only assert TRST or run RESET 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); /* RESET 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);
}
void jtag_set_speed_khz(unsigned khz)
{
speed_khz = khz;
}
unsigned jtag_get_speed_khz(void)
{
return speed_khz;
}
void jtag_set_verify(bool enable)
{
jtag_verify = enable;
}
bool jtag_will_verify()
{
return jtag_verify;
}
int jtag_power_dropout(int *dropout)
{
return jtag->power_dropout(dropout);
}
int jtag_srst_asserted(int *srst_asserted)
{
return jtag->srst_asserted(srst_asserted);
}
void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e)
{
jtag_tap_event_action_t * jteap;
int done;
jteap = tap->event_action;
done = 0;
while (jteap) {
if (jteap->event == e) {
done = 1;
LOG_DEBUG( "JTAG tap: %s event: %d (%s) action: %s\n",
tap->dotted_name,
e,
Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name,
Jim_GetString(jteap->body, NULL) );
if (Jim_EvalObj(interp, jteap->body) != JIM_OK) {
Jim_PrintErrorMessage(interp);
}
}
jteap = jteap->next;
}
if (!done) {
LOG_DEBUG( "event %d %s - no action",
e,
Jim_Nvp_value2name_simple( nvp_jtag_tap_event, e)->name);
}
}
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_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;
}
src/jtag/jtag.c → src/jtag/tcl.c
+ 114
− 1325
View file @ 66707c94
......@@ -9,6 +9,9 @@
* 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 *
......@@ -36,59 +39,6 @@
#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);
/* note that this is not marked as static as it must be available from outside jtag.c for those
that implement the jtag_xxx() minidriver layer
*/
int jtag_error=ERROR_OK;
char* jtag_event_strings[] =
{
"JTAG controller reset (RESET or TRST)"
};
const Jim_Nvp nvp_jtag_tap_event[] = {
{ .value = JTAG_TAP_EVENT_ENABLE, .name = "tap-enable" },
{ .value = JTAG_TAP_EVENT_DISABLE, .name = "tap-disable" },
{ .name = NULL, .value = -1 }
};
int jtag_trst = 0;
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;
enum reset_types jtag_reset_config = RESET_NONE;
tap_state_t cmd_queue_end_state = TAP_RESET;
tap_state_t cmd_queue_cur_state = TAP_RESET;
int jtag_verify_capture_ir = 1;
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 */
/* callbacks to inform high-level handlers about JTAG state changes */
jtag_event_callback_t *jtag_event_callbacks;
/* speed in kHz*/
static int speed_khz = 0;
/* flag if the kHz speed was defined */
static bool hasKHz = false;
......@@ -140,993 +90,110 @@ static bool hasKHz = false;
extern jtag_interface_t usbprog_interface;
#endif
#if BUILD_JLINK == 1
extern jtag_interface_t jlink_interface;
#endif
#if BUILD_VSLLINK == 1
extern jtag_interface_t vsllink_interface;
#endif
#if BUILD_RLINK == 1
extern jtag_interface_t rlink_interface;
#endif
#if BUILD_ARMJTAGEW == 1
extern jtag_interface_t armjtagew_interface;
#endif
#endif // standard drivers
/**
* The list of built-in JTAG interfaces, containing entries for those
* drivers that were enabled by the @c configure script.
*
* The list should be defined to contain either one minidriver interface
* or some number of standard driver interfaces, never both.
*/
jtag_interface_t *jtag_interfaces[] = {
#if BUILD_ECOSBOARD == 1
&zy1000_interface,
#elif defined(BUILD_MINIDRIVER_DUMMY)
&minidummy_interface,
#else // standard drivers
#if BUILD_PARPORT == 1
&parport_interface,
#endif
#if BUILD_DUMMY == 1
&dummy_interface,
#endif
#if BUILD_FT2232_FTD2XX == 1
&ft2232_interface,
#endif
#if BUILD_FT2232_LIBFTDI == 1
&ft2232_interface,
#endif
#if BUILD_AMTJTAGACCEL == 1
&amt_jtagaccel_interface,
#endif
#if BUILD_EP93XX == 1
&ep93xx_interface,
#endif
#if BUILD_AT91RM9200 == 1
&at91rm9200_interface,
#endif
#if BUILD_GW16012 == 1
&gw16012_interface,
#endif
#if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
&presto_interface,
#endif
#if BUILD_USBPROG == 1
&usbprog_interface,
#endif
#if BUILD_JLINK == 1
&jlink_interface,
#endif
#if BUILD_VSLLINK == 1
&vsllink_interface,
#endif
#if BUILD_RLINK == 1
&rlink_interface,
#endif
#if BUILD_ARMJTAGEW == 1
&armjtagew_interface,
#endif
#endif // standard drivers
NULL,
};
struct jtag_interface_s *jtag = NULL;
/* configuration */
static jtag_interface_t *jtag_interface = NULL;
int jtag_speed = 0;
/* jtag commands */
static int handle_interface_list_command(struct command_context_s *cmd_ctx,
char *cmd, char **args, int argc);
static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_khz_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
static int Jim_Command_flush_count(Jim_Interp *interp, int argc, Jim_Obj *const *args);
static int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
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;
}
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 */
char *cp;
unsigned n = strtoul(s, &cp, 0);
if ((s == cp) || (*cp != 0))
return NULL;
return jtag_tap_by_position(n);
}
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;
}
/* returns a pointer to the n-th device in the scan chain */
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;
}
const char *jtag_tap_name(const jtag_tap_t *tap)
{
return (tap == NULL) ? "(unknown)" : tap->dotted_name;
}
int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), 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(int (*callback)(enum jtag_event event, void *priv))
{
jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
if (callback == NULL)
{
return ERROR_INVALID_ARGUMENTS;
}
while (*callbacks_p)
{
jtag_event_callback_t **next = &((*callbacks_p)->next);
if ((*callbacks_p)->callback == callback)
{
free(*callbacks_p);
*callbacks_p = *next;
}
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)
{
callback->callback(event, callback->priv);
callback = 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)
{
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)
{
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, u8 *in)
{
interface_jtag_add_callback(f, in);
}
void jtag_add_callback4(jtag_callback_t f, u8 *in,
jtag_callback_data_t data1, jtag_callback_data_t data2,
jtag_callback_data_t data3)
{
interface_jtag_add_callback4(f, in, data1, data2, data3);
}
int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *in_check_mask, int num_bits);
static int jtag_check_value_mask_callback(u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
{
return jtag_check_value_inner(in, (u8 *)data1, (u8 *)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, 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)
{
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)
{
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 u32* value,
tap_state_t end_state)
{
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());
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
}
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];
}
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;
/* FIX!!! there are *many* different cases here. A better
* approach is needed for legal combinations of transitions...
*/
if ((jtag_reset_config & RESET_HAS_SRST)&&
(jtag_reset_config & RESET_HAS_TRST)&&
((jtag_reset_config & RESET_SRST_PULLS_TRST)==0))
{
if (((req_tlr_or_trst&&!jtag_trst)||
(!req_tlr_or_trst&&jtag_trst))&&
((req_srst&&!jtag_srst)||
(!req_srst&&jtag_srst)))
{
/* FIX!!! srst_pulls_trst allows 1,1 => 0,0 transition.... */
//LOG_ERROR("BUG: transition of req_tlr_or_trst and req_srst in the same jtag_add_reset() call is undefined");
}
}
/* Make sure that jtag_reset_config allows the requested reset */
/* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (!req_tlr_or_trst))
{
LOG_ERROR("BUG: requested reset would assert trst");
jtag_set_error(ERROR_FAIL);
return;
}
/* if TRST pulls SRST, we reset with TAP T-L-R */
if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_tlr_or_trst)) && (req_srst == 0))
{
trst_with_tlr = 1;
}
if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
{
LOG_ERROR("BUG: requested SRST assertion, but the current configuration doesn't support this");
jtag_set_error(ERROR_FAIL);
return;
}
if (req_tlr_or_trst)
{
if (!trst_with_tlr && (jtag_reset_config & RESET_HAS_TRST))
{
jtag_trst = 1;
} else
{
trst_with_tlr = 1;
}
} else
{
jtag_trst = 0;
}
jtag_srst = req_srst;
int retval = interface_jtag_add_reset(jtag_trst, jtag_srst);
if (retval != ERROR_OK)
{
jtag_set_error(retval);
return;
}
jtag_execute_queue();
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);
}
if (trst_with_tlr)
{
LOG_DEBUG("JTAG reset with RESET instead of TRST");
jtag_set_end_state(TAP_RESET);
jtag_add_tlr();
return;
}
if (jtag_trst)
{
/* we just asserted nTRST, so we're now in Test-Logic-Reset,
* and inform possible listeners about this
*/
LOG_DEBUG("TRST line asserted");
tap_set_state(TAP_RESET);
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
}
else
{
if (jtag_ntrst_delay)
jtag_add_sleep(jtag_ntrst_delay * 1000);
}
}
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(u32 us)
{
/// @todo Here, keep_alive() appears to be a layering violation!!!
keep_alive();
jtag_set_error(interface_jtag_add_sleep(us));
}
int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *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){
/* An error handler could have caught the failing check
* only report a problem when there wasn't a handler, or if the handler
* acknowledged the error
*/
/*
LOG_WARNING("TAP %s:",
jtag_tap_name(field->tap));
*/
if (compare_failed)
{
char *captured_char = buf_to_str(captured, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
char *in_check_value_char = buf_to_str(in_check_value, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
if (in_check_mask)
{
char *in_check_mask_char;
in_check_mask_char = buf_to_str(in_check_mask, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
LOG_WARNING("value captured during scan didn't pass the requested check:");
LOG_WARNING("captured: 0x%s check_value: 0x%s check_mask: 0x%s",
captured_char, in_check_value_char, in_check_mask_char);
free(in_check_mask_char);
}
else
{
LOG_WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
}
free(captured_char);
free(in_check_value_char);
retval = ERROR_JTAG_QUEUE_FAILED;
}
}
return retval;
}
void jtag_check_value_mask(scan_field_t *field, u8 *value, u8 *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;
LOG_DEBUG("-");
if (event == JTAG_TRST_ASSERTED)
{
buf_set_ones(tap->cur_instr, tap->ir_length);
tap->bypass = 1;
}
return ERROR_OK;
}
void jtag_sleep(u32 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(u8 *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_RESET);
return jtag_execute_queue();
}
static bool jtag_examine_chain_check(u8 *idcodes, unsigned count)
{
u8 zero_check = 0x0;
u8 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, u32 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, idcode,
EXTRACT_MFG(idcode), EXTRACT_PART(idcode), EXTRACT_VER(idcode) );
}
static bool jtag_idcode_is_final(u32 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(u8 *idcodes, unsigned count, unsigned max)
{
bool triggered = false;
for ( ; count < max - 31; count += 32)
{
u32 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, 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 */
u8 ii;
for (ii = 0; ii < tap->expected_ids_cnt; ii++)
{
if (tap->idcode == tap->expected_ids[ii])
break;
}
/* If none of the expected ids matched, log an error */
if (ii != tap->expected_ids_cnt)
{
LOG_INFO("JTAG Tap/device matched");
return true;
}
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)
{
u8 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; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
{
u32 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");
idcode = 0;
bit_count += 1;
}
else
{
/*
* 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 ? tap->dotted_name : "(not-named)",
idcode);
bit_count += 32;
}
device_count++;
if (!tap)
continue;
tap->idcode = idcode;
// ensure the TAP ID does matches what was expected
if (!jtag_examine_chain_match_tap(tap))
return ERROR_JTAG_INIT_FAILED;
tap = jtag_tap_next_enabled(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, ...)");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
#if BUILD_JLINK == 1
extern jtag_interface_t jlink_interface;
#endif
static int jtag_validate_chain(void)
{
jtag_tap_t *tap;
int total_ir_length = 0;
u8 *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;
}
#if BUILD_VSLLINK == 1
extern jtag_interface_t vsllink_interface;
#endif
total_ir_length += 2;
ir_test = malloc(CEIL(total_ir_length, 8));
buf_set_ones(ir_test, total_ir_length);
#if BUILD_RLINK == 1
extern jtag_interface_t rlink_interface;
#endif
field.tap = NULL;
field.num_bits = total_ir_length;
field.out_value = ir_test;
field.in_value = ir_test;
#if BUILD_ARMJTAGEW == 1
extern jtag_interface_t armjtagew_interface;
#endif
#endif // standard drivers
/**
* The list of built-in JTAG interfaces, containing entries for those
* drivers that were enabled by the @c configure script.
*
* The list should be defined to contain either one minidriver interface
* or some number of standard driver interfaces, never both.
*/
jtag_interface_t *jtag_interfaces[] = {
#if BUILD_ECOSBOARD == 1
&zy1000_interface,
#elif defined(BUILD_MINIDRIVER_DUMMY)
&minidummy_interface,
#else // standard drivers
#if BUILD_PARPORT == 1
&parport_interface,
#endif
#if BUILD_DUMMY == 1
&dummy_interface,
#endif
#if BUILD_FT2232_FTD2XX == 1
&ft2232_interface,
#endif
#if BUILD_FT2232_LIBFTDI == 1
&ft2232_interface,
#endif
#if BUILD_AMTJTAGACCEL == 1
&amt_jtagaccel_interface,
#endif
#if BUILD_EP93XX == 1
&ep93xx_interface,
#endif
#if BUILD_AT91RM9200 == 1
&at91rm9200_interface,
#endif
#if BUILD_GW16012 == 1
&gw16012_interface,
#endif
#if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
&presto_interface,
#endif
#if BUILD_USBPROG == 1
&usbprog_interface,
#endif
#if BUILD_JLINK == 1
&jlink_interface,
#endif
#if BUILD_VSLLINK == 1
&vsllink_interface,
#endif
#if BUILD_RLINK == 1
&rlink_interface,
#endif
#if BUILD_ARMJTAGEW == 1
&armjtagew_interface,
#endif
#endif // standard drivers
NULL,
};
jtag_add_plain_ir_scan(1, &field, TAP_RESET);
jtag_execute_queue();
extern struct jtag_interface_s *jtag;
extern jtag_interface_t *jtag_interface;
tap = NULL;
chain_pos = 0;
int val;
for(;;){
tap = jtag_tap_next_enabled(tap);
if( tap == NULL ){
break;
}
/* jtag commands */
static int handle_interface_list_command(struct command_context_s *cmd_ctx,
char *cmd, char **args, int argc);
static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_khz_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
val = buf_get_u32(ir_test, chain_pos, 2);
if (val != 0x1)
{
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;
}
static int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
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;
}
static int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
static int Jim_Command_flush_count(Jim_Interp *interp, int argc, Jim_Obj *const *args);
free(ir_test);
static int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
return ERROR_OK;
}
extern int jtag_examine_chain(void);
extern int jtag_validate_chain(void);
enum jtag_tap_cfg_param {
JCFG_EVENT
......@@ -1226,39 +293,8 @@ static int jtag_tap_configure_cmd( Jim_GetOptInfo *goi, jtag_tap_t * tap)
}
static 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);
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,
tap->ir_capture_value, tap->ir_capture_mask);
jtag_tap_add(tap);
}
static void jtag_tap_free(jtag_tap_t *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);
}
extern void jtag_tap_init(jtag_tap_t *tap);
extern void jtag_tap_free(jtag_tap_t *tap);
static int jim_newtap_cmd( Jim_GetOptInfo *goi )
{
......@@ -1597,141 +633,6 @@ int jtag_register_commands(struct command_context_s *cmd_ctx)
return ERROR_OK;
}
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;
}
if(hasKHz)
{
jtag_interface->khz(jtag_get_speed_khz(), &jtag_speed);
hasKHz = false;
}
if (jtag_interface->init() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
jtag = jtag_interface;
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 / RESET");
/* Reset can happen after a power cycle.
*
* Ideally we would only assert TRST or run RESET 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); /* RESET 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);
}
void jtag_set_speed_khz(unsigned khz)
{
speed_khz = khz;
}
unsigned jtag_get_speed_khz(void)
{
return speed_khz;
}
static int default_khz(int khz, int *jtag_speed)
{
LOG_ERROR("Translation from khz to jtag_speed not implemented");
......@@ -2426,16 +1327,6 @@ static int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, ch
return ERROR_OK;
}
void jtag_set_verify(bool enable)
{
jtag_verify = enable;
}
bool jtag_will_verify()
{
return jtag_verify;
}
static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc > 1)
......@@ -2457,48 +1348,6 @@ static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *c
return ERROR_OK;
}
int jtag_power_dropout(int *dropout)
{
return jtag->power_dropout(dropout);
}
int jtag_srst_asserted(int *srst_asserted)
{
return jtag->srst_asserted(srst_asserted);
}
void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e)
{
jtag_tap_event_action_t * jteap;
int done;
jteap = tap->event_action;
done = 0;
while (jteap) {
if (jteap->event == e) {
done = 1;
LOG_DEBUG( "JTAG tap: %s event: %d (%s) action: %s\n",
tap->dotted_name,
e,
Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name,
Jim_GetString(jteap->body, NULL) );
if (Jim_EvalObj(interp, jteap->body) != JIM_OK) {
Jim_PrintErrorMessage(interp);
}
}
jteap = jteap->next;
}
if (!done) {
LOG_DEBUG( "event %d %s - no action",
e,
Jim_Nvp_value2name_simple( nvp_jtag_tap_event, e)->name);
}
}
static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc > 1)
......@@ -2523,63 +1372,3 @@ static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *
return ERROR_OK;
}
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_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;
}
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