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openocd/src/jtag/tcl.c

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007-2010 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"
#include "interfaces.h"
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
/**
* @file
* Holds support for accessing JTAG-specific mechanisms from TCl scripts.
*/
static const Jim_Nvp nvp_jtag_tap_event[] = {
{ .value = JTAG_TRST_ASSERTED, .name = "post-reset" },
{ .value = JTAG_TAP_EVENT_SETUP, .name = "setup" },
{ .value = JTAG_TAP_EVENT_ENABLE, .name = "tap-enable" },
{ .value = JTAG_TAP_EVENT_DISABLE, .name = "tap-disable" },
{ .name = NULL, .value = -1 }
};
extern struct jtag_interface *jtag_interface;
struct jtag_tap *jtag_tap_by_jim_obj(Jim_Interp *interp, Jim_Obj *o)
{
const char *cp = Jim_GetString(o, NULL);
struct jtag_tap *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;
}
static bool scan_is_safe(tap_state_t state)
{
switch (state)
{
case TAP_RESET:
case TAP_IDLE:
case TAP_DRPAUSE:
case TAP_IRPAUSE:
return true;
default:
return false;
}
}
static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args)
{
int retval;
struct scan_field *fields;
int num_fields;
int field_count = 0;
int i, e;
struct jtag_tap *tap;
tap_state_t endstate;
/* args[1] = device
* args[2] = num_bits
* args[3] = hex string
* ... repeat num bits and hex string ...
*
* .. optionally:
* args[N-2] = "-endstate"
* args[N-1] = statename
*/
if ((argc < 4) || ((argc % 2) != 0))
{
Jim_WrongNumArgs(interp, 1, args, "wrong arguments");
return JIM_ERR;
}
endstate = TAP_IDLE;
script_debug(interp, "drscan", argc, args);
/* validate arguments as numbers */
e = JIM_OK;
for (i = 2; i < argc; i += 2)
{
long bits;
const char *cp;
e = Jim_GetLong(interp, args[i], &bits);
/* If valid - try next arg */
if (e == JIM_OK) {
continue;
}
/* Not valid.. are we at the end? */
if (((i + 2) != argc)) {
/* nope, then error */
return e;
}
/* it could be: "-endstate FOO"
* e.g. DRPAUSE so we can issue more instructions
* before entering RUN/IDLE and executing them.
*/
/* get arg as a string. */
cp = Jim_GetString(args[i], NULL);
/* is it the magic? */
if (0 == strcmp("-endstate", cp)) {
/* is the statename valid? */
cp = Jim_GetString(args[i + 1], NULL);
/* see if it is a valid state name */
endstate = tap_state_by_name(cp);
if (endstate < 0) {
/* update the error message */
Jim_SetResult_sprintf(interp,"endstate: %s invalid", cp);
} else {
if (!scan_is_safe(endstate))
LOG_WARNING("drscan with unsafe "
"endstate \"%s\"", cp);
/* valid - so clear the error */
e = JIM_OK;
/* and remove the last 2 args */
argc -= 2;
}
}
/* Still an error? */
if (e != JIM_OK) {
return e; /* too bad */
}
} /* validate args */
tap = jtag_tap_by_jim_obj(interp, args[1]);
if (tap == NULL) {
return JIM_ERR;
}
num_fields = (argc-2)/2;
fields = malloc(sizeof(struct scan_field) * num_fields);
for (i = 2; i < argc; i += 2)
{
long bits;
int len;
const char *str;
Jim_GetLong(interp, args[i], &bits);
str = Jim_GetString(args[i + 1], &len);
fields[field_count].num_bits = bits;
void * t = malloc(DIV_ROUND_UP(bits, 8));
fields[field_count].out_value = t;
str_to_buf(str, len, t, bits, 0);
fields[field_count].in_value = t;
field_count++;
}
jtag_add_dr_scan(tap, num_fields, fields, endstate);
retval = jtag_execute_queue();
if (retval != ERROR_OK)
{
Jim_SetResultString(interp, "drscan: jtag execute failed",-1);
return JIM_ERR;
}
field_count = 0;
Jim_Obj *list = Jim_NewListObj(interp, NULL, 0);
for (i = 2; i < argc; i += 2)
{
long bits;
char *str;
Jim_GetLong(interp, args[i], &bits);
str = buf_to_str(fields[field_count].in_value, bits, 16);
free((void *)fields[field_count].out_value);
Jim_ListAppendElement(interp, list, Jim_NewStringObj(interp, str, strlen(str)));
free(str);
field_count++;
}
Jim_SetResult(interp, list);
free(fields);
return JIM_OK;
}
static int Jim_Command_pathmove(Jim_Interp *interp, int argc, Jim_Obj *const *args)
{
tap_state_t states[8];
if ((argc < 2) || ((size_t)argc > (ARRAY_SIZE(states) + 1)))
{
Jim_WrongNumArgs(interp, 1, args, "wrong arguments");
return JIM_ERR;
}
script_debug(interp, "pathmove", argc, args);
int i;
for (i = 0; i < argc-1; i++)
{
const char *cp;
cp = Jim_GetString(args[i + 1], NULL);
states[i] = tap_state_by_name(cp);
if (states[i] < 0)
{
/* update the error message */
Jim_SetResult_sprintf(interp,"endstate: %s invalid", cp);
return JIM_ERR;
}
}
if ((jtag_add_statemove(states[0]) != ERROR_OK) || (jtag_execute_queue()!= ERROR_OK))
{
Jim_SetResultString(interp, "pathmove: jtag execute failed",-1);
return JIM_ERR;
}
jtag_add_pathmove(argc-2, states + 1);
if (jtag_execute_queue()!= ERROR_OK)
{
Jim_SetResultString(interp, "pathmove: failed",-1);
return JIM_ERR;
}
return JIM_OK;
}
static int Jim_Command_flush_count(Jim_Interp *interp, int argc, Jim_Obj *const *args)
{
script_debug(interp, "flush_count", argc, args);
Jim_SetResult(interp, Jim_NewIntObj(interp, jtag_get_flush_queue_count()));
return JIM_OK;
}
/* REVISIT Just what about these should "move" ... ?
* These registrations, into the main JTAG table?
*
* There's a minor compatibility issue, these all show up twice;
* that's not desirable:
* - jtag drscan ... NOT DOCUMENTED!
* - drscan ...
*
* The "irscan" command (for example) doesn't show twice.
*/
static const struct command_registration jtag_command_handlers_to_move[] = {
{
.name = "drscan",
.mode = COMMAND_EXEC,
.jim_handler = Jim_Command_drscan,
.help = "Execute Data Register (DR) scan for one TAP. "
"Other TAPs must be in BYPASS mode.",
.usage = "tap_name [num_bits value]* ['-endstate' state_name]",
},
{
.name = "flush_count",
.mode = COMMAND_EXEC,
.jim_handler = Jim_Command_flush_count,
.help = "Returns the number of times the JTAG queue "
"has been flushed.",
},
{
.name = "pathmove",
.mode = COMMAND_EXEC,
.jim_handler = Jim_Command_pathmove,
.usage = "start_state state1 [state2 [state3 ...]]",
.help = "Move JTAG state machine from current state "
"(start_state) to state1, then state2, state3, etc.",
},
COMMAND_REGISTRATION_DONE
};
enum jtag_tap_cfg_param {
JCFG_EVENT
};
static Jim_Nvp nvp_config_opts[] = {
{ .name = "-event", .value = JCFG_EVENT },
{ .name = NULL, .value = -1 }
};
static int jtag_tap_configure_event(Jim_GetOptInfo *goi, struct jtag_tap * tap)
{
if (goi->argc == 0)
{
Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event <event-name> ...");
return JIM_ERR;
}
Jim_Nvp *n;
int e = Jim_GetOpt_Nvp(goi, nvp_jtag_tap_event, &n);
if (e != JIM_OK)
{
Jim_GetOpt_NvpUnknown(goi, nvp_jtag_tap_event, 1);
return e;
}
if (goi->isconfigure) {
if (goi->argc != 1) {
Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event <event-name> <event-body>");
return JIM_ERR;
}
} else {
if (goi->argc != 0) {
Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event <event-name>");
return JIM_ERR;
}
}
struct jtag_tap_event_action *jteap = tap->event_action;
/* replace existing event body */
bool found = false;
while (jteap)
{
if (jteap->event == (enum jtag_event)n->value)
{
found = true;
break;
}
jteap = jteap->next;
}
Jim_SetEmptyResult(goi->interp);
if (goi->isconfigure)
{
if (!found)
jteap = calloc(1, sizeof(*jteap));
else if (NULL != jteap->body)
Jim_DecrRefCount(goi->interp, jteap->body);
jteap->interp = goi->interp;
jteap->event = n->value;
Jim_Obj *o;
Jim_GetOpt_Obj(goi, &o);
jteap->body = Jim_DuplicateObj(goi->interp, o);
Jim_IncrRefCount(jteap->body);
if (!found)
{
/* add to head of event list */
jteap->next = tap->event_action;
tap->event_action = jteap;
}
}
else if (found)
{
jteap->interp = goi->interp;
Jim_SetResult(goi->interp,
Jim_DuplicateObj(goi->interp, jteap->body));
}
return JIM_OK;
}
static int jtag_tap_configure_cmd(Jim_GetOptInfo *goi, struct jtag_tap * tap)
{
/* parse config or cget options */
while (goi->argc > 0)
{
Jim_SetEmptyResult (goi->interp);
Jim_Nvp *n;
int e = Jim_GetOpt_Nvp(goi, nvp_config_opts, &n);
if (e != JIM_OK)
{
Jim_GetOpt_NvpUnknown(goi, nvp_config_opts, 0);
return e;
}
switch (n->value)
{
case JCFG_EVENT:
e = jtag_tap_configure_event(goi, tap);
if (e != JIM_OK)
return e;
break;
default:
Jim_SetResult_sprintf(goi->interp, "unknown event: %s", n->name);
return JIM_ERR;
}
}
return JIM_OK;
}
static int is_bad_irval(int ir_length, jim_wide w)
{
jim_wide v = 1;
v <<= ir_length;
v -= 1;
v = ~v;
return (w & v) != 0;
}
static int jim_newtap_expected_id(Jim_Nvp *n, Jim_GetOptInfo *goi,
struct jtag_tap *pTap)
{
jim_wide w;
int e = Jim_GetOpt_Wide(goi, &w);
if (e != JIM_OK) {
Jim_SetResult_sprintf(goi->interp, "option: %s bad parameter", n->name);
return e;
}
unsigned expected_len = sizeof(uint32_t) * pTap->expected_ids_cnt;
uint32_t *new_expected_ids = malloc(expected_len + sizeof(uint32_t));
if (new_expected_ids == NULL)
{
Jim_SetResult_sprintf(goi->interp, "no memory");
return JIM_ERR;
}
memcpy(new_expected_ids, pTap->expected_ids, expected_len);
new_expected_ids[pTap->expected_ids_cnt] = w;
free(pTap->expected_ids);
pTap->expected_ids = new_expected_ids;
pTap->expected_ids_cnt++;
return JIM_OK;
}
#define NTAP_OPT_IRLEN 0
#define NTAP_OPT_IRMASK 1
#define NTAP_OPT_IRCAPTURE 2
#define NTAP_OPT_ENABLED 3
#define NTAP_OPT_DISABLED 4
#define NTAP_OPT_EXPECTED_ID 5
#define NTAP_OPT_VERSION 6
static int jim_newtap_ir_param(Jim_Nvp *n, Jim_GetOptInfo *goi,
struct jtag_tap *pTap)
{
jim_wide w;
int e = Jim_GetOpt_Wide(goi, &w);
if (e != JIM_OK)
{
Jim_SetResult_sprintf(goi->interp,
"option: %s bad parameter", n->name);
free((void *)pTap->dotted_name);
return e;
}
switch (n->value) {
case NTAP_OPT_IRLEN:
if (w > (jim_wide) (8 * sizeof(pTap->ir_capture_value)))
{
LOG_WARNING("%s: huge IR length %d",
pTap->dotted_name, (int) w);
}
pTap->ir_length = w;
break;
case NTAP_OPT_IRMASK:
if (is_bad_irval(pTap->ir_length, w))
{
LOG_ERROR("%s: IR mask %x too big",
pTap->dotted_name,
(int) w);
return JIM_ERR;
}
if ((w & 3) != 3)
LOG_WARNING("%s: nonstandard IR mask", pTap->dotted_name);
pTap->ir_capture_mask = w;
break;
case NTAP_OPT_IRCAPTURE:
if (is_bad_irval(pTap->ir_length, w))
{
LOG_ERROR("%s: IR capture %x too big",
pTap->dotted_name, (int) w);
return JIM_ERR;
}
if ((w & 3) != 1)
LOG_WARNING("%s: nonstandard IR value",
pTap->dotted_name);
pTap->ir_capture_value = w;
break;
default:
return JIM_ERR;
}
return JIM_OK;
}
static int jim_newtap_cmd(Jim_GetOptInfo *goi)
{
struct jtag_tap *pTap;
int x;
int e;
Jim_Nvp *n;
char *cp;
const Jim_Nvp opts[] = {
{ .name = "-irlen" , .value = NTAP_OPT_IRLEN },
{ .name = "-irmask" , .value = NTAP_OPT_IRMASK },
{ .name = "-ircapture" , .value = NTAP_OPT_IRCAPTURE },
{ .name = "-enable" , .value = NTAP_OPT_ENABLED },
{ .name = "-disable" , .value = NTAP_OPT_DISABLED },
{ .name = "-expected-id" , .value = NTAP_OPT_EXPECTED_ID },
{ .name = "-ignore-version" , .value = NTAP_OPT_VERSION },
{ .name = NULL , .value = -1 },
};
pTap = calloc(1, sizeof(struct jtag_tap));
if (!pTap) {
Jim_SetResult_sprintf(goi->interp, "no memory");
return JIM_ERR;
}
/*
* we expect CHIP + TAP + OPTIONS
* */
if (goi->argc < 3) {
Jim_SetResult_sprintf(goi->interp, "Missing CHIP TAP OPTIONS ....");
free(pTap);
return JIM_ERR;
}
Jim_GetOpt_String(goi, &cp, NULL);
pTap->chip = strdup(cp);
Jim_GetOpt_String(goi, &cp, NULL);
pTap->tapname = strdup(cp);
/* name + dot + name + null */
x = strlen(pTap->chip) + 1 + strlen(pTap->tapname) + 1;
cp = malloc(x);
sprintf(cp, "%s.%s", pTap->chip, pTap->tapname);
pTap->dotted_name = cp;
LOG_DEBUG("Creating New Tap, Chip: %s, Tap: %s, Dotted: %s, %d params",
pTap->chip, pTap->tapname, pTap->dotted_name, goi->argc);
/* IEEE specifies that the two LSBs of an IR scan are 01, so make
* that the default. The "-irlen" and "-irmask" options are only
* needed to cope with nonstandard TAPs, or to specify more bits.
*/
pTap->ir_capture_mask = 0x03;
pTap->ir_capture_value = 0x01;
while (goi->argc) {
e = Jim_GetOpt_Nvp(goi, opts, &n);
if (e != JIM_OK) {
Jim_GetOpt_NvpUnknown(goi, opts, 0);
free((void *)pTap->dotted_name);
free(pTap);
return e;
}
LOG_DEBUG("Processing option: %s", n->name);
switch (n->value) {
case NTAP_OPT_ENABLED:
pTap->disabled_after_reset = false;
break;
case NTAP_OPT_DISABLED:
pTap->disabled_after_reset = true;
break;
case NTAP_OPT_EXPECTED_ID:
e = jim_newtap_expected_id(n, goi, pTap);
if (JIM_OK != e)
{
free((void *)pTap->dotted_name);
free(pTap);
return e;
}
break;
case NTAP_OPT_IRLEN:
case NTAP_OPT_IRMASK:
case NTAP_OPT_IRCAPTURE:
e = jim_newtap_ir_param(n, goi, pTap);
if (JIM_OK != e)
{
free((void *)pTap->dotted_name);
free(pTap);
return e;
}
break;
case NTAP_OPT_VERSION:
pTap->ignore_version = true;
break;
} /* switch (n->value) */
} /* while (goi->argc) */
/* default is enabled-after-reset */
pTap->enabled = !pTap->disabled_after_reset;
/* Did all the required option bits get cleared? */
if (pTap->ir_length != 0)
{
jtag_tap_init(pTap);
return JIM_OK;
}
Jim_SetResult_sprintf(goi->interp,
"newtap: %s missing IR length",
pTap->dotted_name);
jtag_tap_free(pTap);
return JIM_ERR;
}
static void jtag_tap_handle_event(struct jtag_tap *tap, enum jtag_event e)
{
struct jtag_tap_event_action * jteap;
for (jteap = tap->event_action; jteap != NULL; jteap = jteap->next)
{
if (jteap->event != e)
continue;
Jim_Nvp *nvp = Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e);
LOG_DEBUG("JTAG tap: %s event: %d (%s)\n\taction: %s",
tap->dotted_name, e, nvp->name,
Jim_GetString(jteap->body, NULL));
if (Jim_EvalObj(jteap->interp, jteap->body) != JIM_OK)
{
Jim_PrintErrorMessage(jteap->interp);
continue;
}
switch (e)
{
case JTAG_TAP_EVENT_ENABLE:
case JTAG_TAP_EVENT_DISABLE:
/* NOTE: we currently assume the handlers
* can't fail. Right here is where we should
* really be verifying the scan chains ...
*/
tap->enabled = (e == JTAG_TAP_EVENT_ENABLE);
LOG_INFO("JTAG tap: %s %s", tap->dotted_name,
tap->enabled ? "enabled" : "disabled");
break;
default:
break;
}
}
}
static int jim_jtag_arp_init(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
if (goi.argc != 0) {
Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
return JIM_ERR;
}
struct command_context *context = Jim_GetAssocData(interp, "context");
int e = jtag_init_inner(context);
if (e != ERROR_OK) {
Jim_SetResult_sprintf(goi.interp, "error: %d", e);
return JIM_ERR;
}
return JIM_OK;
}
static int jim_jtag_arp_init_reset(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
if (goi.argc != 0) {
Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
return JIM_ERR;
}
struct command_context *context = Jim_GetAssocData(interp, "context");
int e = jtag_init_reset(context);
if (e != ERROR_OK) {
Jim_SetResult_sprintf(goi.interp, "error: %d", e);
return JIM_ERR;
}
return JIM_OK;
}
static int jim_jtag_newtap(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
return jim_newtap_cmd(&goi);
}
static bool jtag_tap_enable(struct jtag_tap *t)
{
if (t->enabled)
return false;
jtag_tap_handle_event(t, JTAG_TAP_EVENT_ENABLE);
if (!t->enabled)
return false;
/* FIXME add JTAG sanity checks, w/o TLR
* - scan chain length grew by one (this)
* - IDs and IR lengths are as expected
*/
jtag_call_event_callbacks(JTAG_TAP_EVENT_ENABLE);
return true;
}
static bool jtag_tap_disable(struct jtag_tap *t)
{
if (!t->enabled)
return false;
jtag_tap_handle_event(t, JTAG_TAP_EVENT_DISABLE);
if (t->enabled)
return false;
/* FIXME add JTAG sanity checks, w/o TLR
* - scan chain length shrank by one (this)
* - IDs and IR lengths are as expected
*/
jtag_call_event_callbacks(JTAG_TAP_EVENT_DISABLE);
return true;
}
static int jim_jtag_tap_enabler(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *cmd_name = Jim_GetString(argv[0], NULL);
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
if (goi.argc != 1) {
Jim_SetResult_sprintf(goi.interp, "usage: %s <name>", cmd_name);
return JIM_ERR;
}
struct jtag_tap *t;
t = jtag_tap_by_jim_obj(goi.interp, goi.argv[0]);
if (t == NULL)
return JIM_ERR;
if (strcasecmp(cmd_name, "tapisenabled") == 0) {
// do nothing, just return the value
} else if (strcasecmp(cmd_name, "tapenable") == 0) {
if (!jtag_tap_enable(t))
LOG_WARNING("failed to disable tap");
} else if (strcasecmp(cmd_name, "tapdisable") == 0) {
if (!jtag_tap_disable(t))
LOG_WARNING("failed to disable tap");
} else {
LOG_ERROR("command '%s' unknown", cmd_name);
return JIM_ERR;
}
bool e = t->enabled;
Jim_SetResult(goi.interp, Jim_NewIntObj(goi.interp, e));
return JIM_OK;
}
static int jim_jtag_configure(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *cmd_name = Jim_GetString(argv[0], NULL);
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
goi.isconfigure = !strcmp(cmd_name, "configure");
if (goi.argc < 2 + goi.isconfigure) {
Jim_WrongNumArgs(goi.interp, 0, NULL,
"<tap_name> <attribute> ...");
return JIM_ERR;
}
struct jtag_tap *t;
Jim_Obj *o;
Jim_GetOpt_Obj(&goi, &o);
t = jtag_tap_by_jim_obj(goi.interp, o);
if (t == NULL) {
return JIM_ERR;
}
return jtag_tap_configure_cmd(&goi, t);
}
static int jim_jtag_names(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
if (goi.argc != 0) {
Jim_WrongNumArgs(goi.interp, 1, goi.argv, "Too many parameters");
return JIM_ERR;
}
Jim_SetResult(goi.interp, Jim_NewListObj(goi.interp, NULL, 0));
struct jtag_tap *tap;
for (tap = jtag_all_taps(); tap; tap = tap->next_tap) {
Jim_ListAppendElement(goi.interp,
Jim_GetResult(goi.interp),
Jim_NewStringObj(goi.interp,
tap->dotted_name, -1));
}
return JIM_OK;
}
COMMAND_HANDLER(handle_jtag_init_command)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
static bool jtag_initialized = false;
if (jtag_initialized)
{
LOG_INFO("'jtag init' has already been called");
return ERROR_OK;
}
jtag_initialized = true;
LOG_DEBUG("Initializing jtag devices...");
return jtag_init(CMD_CTX);
}
static const struct command_registration jtag_subcommand_handlers[] = {
{
.name = "init",
.mode = COMMAND_ANY,
.handler = handle_jtag_init_command,
.help = "initialize jtag scan chain",
},
{
.name = "arp_init",
.mode = COMMAND_ANY,
.jim_handler = jim_jtag_arp_init,
.help = "Validates JTAG scan chain against the list of "
"declared TAPs using just the four standard JTAG "
"signals.",
},
{
.name = "arp_init-reset",
.mode = COMMAND_ANY,
.jim_handler = jim_jtag_arp_init_reset,
.help = "Uses TRST and SRST to try resetting everything on "
"the JTAG scan chain, then performs 'jtag arp_init'."
},
{
.name = "newtap",
.mode = COMMAND_CONFIG,
.jim_handler = jim_jtag_newtap,
.help = "Create a new TAP instance named basename.tap_type, "
"and appends it to the scan chain.",
.usage = "basename tap_type '-irlen' count "
"['-enable'|'-disable'] "
"['-expected_id' number] "
"['-ignore-version'] "
"['-ircapture' number] "
"['-mask' number] ",
},
{
.name = "tapisenabled",
.mode = COMMAND_EXEC,
.jim_handler = jim_jtag_tap_enabler,
.help = "Returns a Tcl boolean (0/1) indicating whether "
"the TAP is enabled (1) or not (0).",
.usage = "tap_name",
},
{
.name = "tapenable",
.mode = COMMAND_EXEC,
.jim_handler = jim_jtag_tap_enabler,
.help = "Try to enable the specified TAP using the "
"'tap-enable' TAP event.",
.usage = "tap_name",
},
{
.name = "tapdisable",
.mode = COMMAND_EXEC,
.jim_handler = jim_jtag_tap_enabler,
.help = "Try to disable the specified TAP using the "
"'tap-disable' TAP event.",
.usage = "tap_name",
},
{
.name = "configure",
.mode = COMMAND_EXEC,
.jim_handler = jim_jtag_configure,
.help = "Provide a Tcl handler for the specified "
"TAP event.",
.usage = "tap_name '-event' event_name handler",
},
{
.name = "cget",
.mode = COMMAND_EXEC,
.jim_handler = jim_jtag_configure,
.help = "Return any Tcl handler for the specified "
"TAP event.",
.usage = "tap_name '-event' event_name",
},
{
.name = "names",
.mode = COMMAND_ANY,
.jim_handler = jim_jtag_names,
.help = "Returns list of all JTAG tap names.",
},
{
.chain = jtag_command_handlers_to_move,
},
COMMAND_REGISTRATION_DONE
};
void jtag_notify_event(enum jtag_event event)
{
struct jtag_tap *tap;
for (tap = jtag_all_taps(); tap; tap = tap->next_tap)
jtag_tap_handle_event(tap, event);
}
COMMAND_HANDLER(handle_scan_chain_command)
{
struct jtag_tap *tap;
char expected_id[12];
tap = jtag_all_taps();
command_print(CMD_CTX,
" TapName Enabled IdCode Expected IrLen IrCap IrMask");
command_print(CMD_CTX,
"-- ------------------- -------- ---------- ---------- ----- ----- ------");
while (tap) {
uint32_t expected, expected_mask, ii;
snprintf(expected_id, sizeof expected_id, "0x%08x",
(unsigned)((tap->expected_ids_cnt > 0)
? tap->expected_ids[0]
: 0));
if (tap->ignore_version)
expected_id[2] = '*';
expected = buf_get_u32(tap->expected, 0, tap->ir_length);
expected_mask = buf_get_u32(tap->expected_mask, 0, tap->ir_length);
command_print(CMD_CTX,
"%2d %-18s %c 0x%08x %s %5d 0x%02x 0x%02x",
tap->abs_chain_position,
tap->dotted_name,
tap->enabled ? 'Y' : 'n',
(unsigned int)(tap->idcode),
expected_id,
(unsigned int)(tap->ir_length),
(unsigned int)(expected),
(unsigned int)(expected_mask));
for (ii = 1; ii < tap->expected_ids_cnt; ii++) {
snprintf(expected_id, sizeof expected_id, "0x%08x",
(unsigned) tap->expected_ids[1]);
if (tap->ignore_version)
expected_id[2] = '*';
command_print(CMD_CTX,
" %s",
expected_id);
}
tap = tap->next_tap;
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_ntrst_delay_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1)
{
unsigned delay;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], delay);
jtag_set_ntrst_delay(delay);
}
command_print(CMD_CTX, "jtag_ntrst_delay: %u", jtag_get_ntrst_delay());
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_ntrst_assert_width_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1)
{
unsigned delay;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], delay);
jtag_set_ntrst_assert_width(delay);
}
command_print(CMD_CTX, "jtag_ntrst_assert_width: %u", jtag_get_ntrst_assert_width());
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_rclk_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
int retval = ERROR_OK;
if (CMD_ARGC == 1)
{
unsigned khz = 0;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], khz);
retval = jtag_config_rclk(khz);
if (ERROR_OK != retval)
return retval;
}
int cur_khz = jtag_get_speed_khz();
retval = jtag_get_speed_readable(&cur_khz);
if (ERROR_OK != retval)
return retval;
if (cur_khz)
command_print(CMD_CTX, "RCLK not supported - fallback to %d kHz", cur_khz);
else
command_print(CMD_CTX, "RCLK - adaptive");
return retval;
}
COMMAND_HANDLER(handle_jtag_reset_command)
{
if (CMD_ARGC != 2)
return ERROR_COMMAND_SYNTAX_ERROR;
int trst = -1;
if (CMD_ARGV[0][0] == '1')
trst = 1;
else if (CMD_ARGV[0][0] == '0')
trst = 0;
else
return ERROR_COMMAND_SYNTAX_ERROR;
int srst = -1;
if (CMD_ARGV[1][0] == '1')
srst = 1;
else if (CMD_ARGV[1][0] == '0')
srst = 0;
else
return ERROR_COMMAND_SYNTAX_ERROR;
if (adapter_init(CMD_CTX) != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
jtag_add_reset(trst, srst);
return jtag_execute_queue();
}
COMMAND_HANDLER(handle_runtest_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
unsigned num_clocks;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], num_clocks);
jtag_add_runtest(num_clocks, TAP_IDLE);
return jtag_execute_queue();
}
/*
* For "irscan" or "drscan" commands, the "end" (really, "next") state
* should be stable ... and *NOT* a shift state, otherwise free-running
* jtag clocks could change the values latched by the update state.
* Not surprisingly, this is the same constraint as SVF; the "irscan"
* and "drscan" commands are a write-only subset of what SVF provides.
*/
COMMAND_HANDLER(handle_irscan_command)
{
int i;
struct scan_field *fields;
struct jtag_tap *tap = NULL;
tap_state_t endstate;
if ((CMD_ARGC < 2) || (CMD_ARGC % 2))
{
return ERROR_COMMAND_SYNTAX_ERROR;
}
/* optional "-endstate" "statename" at the end of the arguments,
* so that e.g. IRPAUSE can let us load the data register before
* entering RUN/IDLE to execute the instruction we load here.
*/
endstate = TAP_IDLE;
if (CMD_ARGC >= 4) {
/* have at least one pair of numbers. */
/* is last pair the magic text? */
if (strcmp("-endstate", CMD_ARGV[CMD_ARGC - 2]) == 0) {
endstate = tap_state_by_name(CMD_ARGV[CMD_ARGC - 1]);
if (endstate == TAP_INVALID)
return ERROR_COMMAND_SYNTAX_ERROR;
if (!scan_is_safe(endstate))
LOG_WARNING("unstable irscan endstate \"%s\"",
CMD_ARGV[CMD_ARGC - 1]);
CMD_ARGC -= 2;
}
}
int num_fields = CMD_ARGC / 2;
if (num_fields > 1)
{
/* we really should be looking at plain_ir_scan if we want
* anything more fancy.
*/
LOG_ERROR("Specify a single value for tap");
return ERROR_COMMAND_SYNTAX_ERROR;
}
size_t fields_len = sizeof(struct scan_field) * num_fields;
fields = malloc(fields_len);
memset(fields, 0, fields_len);
int retval;
for (i = 0; i < num_fields; i++)
{
tap = jtag_tap_by_string(CMD_ARGV[i*2]);
if (tap == NULL)
{
int j;
for (j = 0; j < i; j++)
free((void *)fields[j].out_value);
free(fields);
command_print(CMD_CTX, "Tap: %s unknown", CMD_ARGV[i*2]);
return ERROR_FAIL;
}
int field_size = tap->ir_length;
fields[i].num_bits = field_size;
fields[i].out_value = malloc(DIV_ROUND_UP(field_size, 8));
uint32_t value;
retval = parse_u32(CMD_ARGV[i * 2 + 1], &value);
if (ERROR_OK != retval)
goto error_return;
buf_set_u32((void *)fields[i].out_value, 0, field_size, value);
fields[i].in_value = NULL;
}
/* did we have an endstate? */
jtag_add_ir_scan(tap, fields, endstate);
retval = jtag_execute_queue();
error_return:
for (i = 0; i < num_fields; i++)
{
if (NULL != fields[i].out_value)
free((void *)fields[i].out_value);
}
free (fields);
return retval;
}
COMMAND_HANDLER(handle_verify_ircapture_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1)
{
bool enable;
COMMAND_PARSE_ENABLE(CMD_ARGV[0], enable);
jtag_set_verify_capture_ir(enable);
}
const char *status = jtag_will_verify_capture_ir() ? "enabled": "disabled";
command_print(CMD_CTX, "verify Capture-IR is %s", status);
return ERROR_OK;
}
COMMAND_HANDLER(handle_verify_jtag_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1)
{
bool enable;
COMMAND_PARSE_ENABLE(CMD_ARGV[0], enable);
jtag_set_verify(enable);
}
const char *status = jtag_will_verify() ? "enabled": "disabled";
command_print(CMD_CTX, "verify jtag capture is %s", status);
return ERROR_OK;
}
COMMAND_HANDLER(handle_tms_sequence_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1)
{
bool use_new_table;
if (strcmp(CMD_ARGV[0], "short") == 0)
use_new_table = true;
else if (strcmp(CMD_ARGV[0], "long") == 0)
use_new_table = false;
else
return ERROR_COMMAND_SYNTAX_ERROR;
tap_use_new_tms_table(use_new_table);
}
command_print(CMD_CTX, "tms sequence is %s",
tap_uses_new_tms_table() ? "short": "long");
return ERROR_OK;
}
static const struct command_registration jtag_command_handlers[] = {
{
.name = "jtag_rclk",
.handler = handle_jtag_rclk_command,
.mode = COMMAND_ANY,
.help = "With an argument, change to to use adaptive clocking "
"if possible; else to use the fallback speed. "
"With or without argument, display current setting.",
.usage = "[fallback_speed_khz]",
},
{
.name = "jtag_ntrst_delay",
.handler = handle_jtag_ntrst_delay_command,
.mode = COMMAND_ANY,
.help = "delay after deasserting trst in ms",
.usage = "[milliseconds]",
},
{
.name = "jtag_ntrst_assert_width",
.handler = handle_jtag_ntrst_assert_width_command,
.mode = COMMAND_ANY,
.help = "delay after asserting trst in ms",
.usage = "[milliseconds]",
},
{
.name = "scan_chain",
.handler = handle_scan_chain_command,
.mode = COMMAND_ANY,
.help = "print current scan chain configuration",
},
{
.name = "jtag_reset",
.handler = handle_jtag_reset_command,
.mode = COMMAND_EXEC,
.help = "Set reset line values. Value '1' is active, "
"value '0' is inactive.",
.usage = "trst_active srst_active",
},
{
.name = "runtest",
.handler = handle_runtest_command,
.mode = COMMAND_EXEC,
.help = "Move to Run-Test/Idle, and issue TCK for num_cycles.",
.usage = "num_cycles"
},
{
.name = "irscan",
.handler = handle_irscan_command,
.mode = COMMAND_EXEC,
.help = "Execute Instruction Register (DR) scan. The "
"specified opcodes are put into each TAP's IR, "
"and other TAPs are put in BYPASS.",
.usage = "[tap_name instruction]* ['-endstate' state_name]",
},
{
.name = "verify_ircapture",
.handler = handle_verify_ircapture_command,
.mode = COMMAND_ANY,
.help = "Display or assign flag controlling whether to "
"verify values captured during Capture-IR.",
.usage = "['enable'|'disable']",
},
{
.name = "verify_jtag",
.handler = handle_verify_jtag_command,
.mode = COMMAND_ANY,
.help = "Display or assign flag controlling whether to "
"verify values captured during IR and DR scans.",
.usage = "['enable'|'disable']",
},
{
.name = "tms_sequence",
.handler = handle_tms_sequence_command,
.mode = COMMAND_ANY,
.help = "Display or change what style TMS sequences to use "
"for JTAG state transitions: short (default) or "
"long. Only for working around JTAG bugs.",
/* Specifically for working around DRIVER bugs... */
.usage = "['short'|'long']",
},
{
.name = "jtag",
.mode = COMMAND_ANY,
.help = "perform jtag tap actions",
.chain = jtag_subcommand_handlers,
},
{
.chain = jtag_command_handlers_to_move,
},
COMMAND_REGISTRATION_DONE
};
int jtag_register_commands(struct command_context *cmd_ctx)
{
return register_commands(cmd_ctx, NULL, jtag_command_handlers);
}
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