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|
// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* 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 *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "adapter.h"
#include "jtag.h"
#include "swd.h"
#include "minidriver.h"
#include "interface.h"
#include "interfaces.h"
#include "tcl.h"
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <helper/command.h>
#include <helper/nvp.h>
#include <helper/time_support.h>
#include "transport/transport.h"
/**
* @file
* Holds support for accessing JTAG-specific mechanisms from TCl scripts.
*/
static const struct 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 }
};
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 (!cp)
cp = "(unknown)";
if (!t)
Jim_SetResultFormatted(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 COMMAND_HELPER(handle_jtag_command_drscan_fields, struct scan_field *fields)
{
unsigned int field_count = 0;
for (unsigned int i = 1; i < CMD_ARGC; i += 2) {
unsigned int bits;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[i], bits);
fields[field_count].num_bits = bits;
void *t = malloc(DIV_ROUND_UP(bits, 8));
if (!t) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
fields[field_count].out_value = t;
str_to_buf(CMD_ARGV[i + 1], strlen(CMD_ARGV[i + 1]), t, bits, 0);
fields[field_count].in_value = t;
field_count++;
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_command_drscan)
{
/*
* CMD_ARGV[0] = device
* CMD_ARGV[1] = num_bits
* CMD_ARGV[2] = hex string
* ... repeat num bits and hex string ...
*
* ... optionally:
* CMD_ARGV[CMD_ARGC-2] = "-endstate"
* CMD_ARGV[CMD_ARGC-1] = statename
*/
if (CMD_ARGC < 3 || (CMD_ARGC % 2) != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
struct jtag_tap *tap = jtag_tap_by_string(CMD_ARGV[0]);
if (!tap) {
command_print(CMD, "Tap '%s' could not be found", CMD_ARGV[0]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
if (tap->bypass) {
command_print(CMD, "Can't execute as the selected tap is in BYPASS");
return ERROR_FAIL;
}
tap_state_t endstate = TAP_IDLE;
if (CMD_ARGC > 3 && !strcmp("-endstate", CMD_ARGV[CMD_ARGC - 2])) {
const char *state_name = CMD_ARGV[CMD_ARGC - 1];
endstate = tap_state_by_name(state_name);
if (endstate < 0) {
command_print(CMD, "endstate: %s invalid", state_name);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
if (!scan_is_safe(endstate))
LOG_WARNING("drscan with unsafe endstate \"%s\"", state_name);
CMD_ARGC -= 2;
}
unsigned int num_fields = (CMD_ARGC - 1) / 2;
struct scan_field *fields = calloc(num_fields, sizeof(struct scan_field));
if (!fields) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
int retval = CALL_COMMAND_HANDLER(handle_jtag_command_drscan_fields, fields);
if (retval != ERROR_OK)
goto fail;
jtag_add_dr_scan(tap, num_fields, fields, endstate);
retval = jtag_execute_queue();
if (retval != ERROR_OK) {
command_print(CMD, "drscan: jtag execute failed");
goto fail;
}
for (unsigned int i = 0; i < num_fields; i++) {
char *str = buf_to_hex_str(fields[i].in_value, fields[i].num_bits);
command_print(CMD, "%s", str);
free(str);
}
fail:
for (unsigned int i = 0; i < num_fields; i++)
free(fields[i].in_value);
free(fields);
return retval;
}
COMMAND_HANDLER(handle_jtag_command_pathmove)
{
tap_state_t states[8];
if (CMD_ARGC < 1 || CMD_ARGC > ARRAY_SIZE(states))
return ERROR_COMMAND_SYNTAX_ERROR;
for (unsigned int i = 0; i < CMD_ARGC; i++) {
states[i] = tap_state_by_name(CMD_ARGV[i]);
if (states[i] < 0) {
command_print(CMD, "endstate: %s invalid", CMD_ARGV[i]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
}
int retval = jtag_add_statemove(states[0]);
if (retval == ERROR_OK)
retval = jtag_execute_queue();
if (retval != ERROR_OK) {
command_print(CMD, "pathmove: jtag execute failed");
return retval;
}
jtag_add_pathmove(CMD_ARGC - 1, states + 1);
retval = jtag_execute_queue();
if (retval != ERROR_OK) {
command_print(CMD, "pathmove: failed");
return retval;
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_flush_count)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
int count = jtag_get_flush_queue_count();
command_print_sameline(CMD, "%d", count);
return ERROR_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,
.handler = handle_jtag_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,
.handler = handle_jtag_flush_count,
.help = "Returns the number of times the JTAG queue "
"has been flushed.",
.usage = "",
},
{
.name = "pathmove",
.mode = COMMAND_EXEC,
.handler = handle_jtag_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,
JCFG_IDCODE,
};
static struct nvp nvp_config_opts[] = {
{ .name = "-event", .value = JCFG_EVENT },
{ .name = "-idcode", .value = JCFG_IDCODE },
{ .name = NULL, .value = -1 }
};
static int jtag_tap_set_event(struct command_context *cmd_ctx, struct jtag_tap *tap,
const struct nvp *event, Jim_Obj *body)
{
struct jtag_tap_event_action *jteap = tap->event_action;
while (jteap) {
if (jteap->event == (enum jtag_event)event->value)
break;
jteap = jteap->next;
}
if (!jteap) {
jteap = calloc(1, sizeof(*jteap));
if (!jteap) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
/* add to head of event list */
jteap->next = tap->event_action;
tap->event_action = jteap;
} else {
Jim_DecrRefCount(cmd_ctx->interp, jteap->body);
}
jteap->interp = cmd_ctx->interp;
jteap->event = (enum jtag_event)event->value;
jteap->body = Jim_DuplicateObj(cmd_ctx->interp, body);
Jim_IncrRefCount(jteap->body);
return ERROR_OK;
}
__COMMAND_HANDLER(handle_jtag_configure)
{
bool is_configure = !strcmp(CMD_NAME, "configure");
if (CMD_ARGC < (is_configure ? 3 : 2))
return ERROR_COMMAND_SYNTAX_ERROR;
/* FIXME: rework jtag_tap_by_jim_obj */
struct jtag_tap *tap = jtag_tap_by_jim_obj(CMD_CTX->interp, CMD_JIMTCL_ARGV[0]);
if (!tap)
return ERROR_FAIL;
for (unsigned int i = 1; i < CMD_ARGC; i++) {
const struct nvp *n = nvp_name2value(nvp_config_opts, CMD_ARGV[i]);
switch (n->value) {
case JCFG_EVENT:
if (i + (is_configure ? 2 : 1) >= CMD_ARGC) {
command_print(CMD, "wrong # args: should be \"-event <event-name>%s\"",
is_configure ? " <event-body>" : "");
return ERROR_COMMAND_ARGUMENT_INVALID;
}
const struct nvp *event = nvp_name2value(nvp_jtag_tap_event, CMD_ARGV[i + 1]);
if (!event->name) {
nvp_unknown_command_print(CMD, nvp_jtag_tap_event, CMD_ARGV[i], CMD_ARGV[i + 1]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
if (is_configure) {
int retval = jtag_tap_set_event(CMD_CTX, tap, event, CMD_JIMTCL_ARGV[i + 2]);
if (retval != ERROR_OK)
return retval;
} else {
struct jtag_tap_event_action *jteap = tap->event_action;
while (jteap) {
if (jteap->event == (enum jtag_event)event->value) {
command_print(CMD, "%s", Jim_GetString(jteap->body, NULL));
break;
}
jteap = jteap->next;
}
}
i += is_configure ? 2 : 1;
break;
case JCFG_IDCODE:
if (is_configure) {
command_print(CMD, "not settable: %s", n->name);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
command_print(CMD, "0x%08x", tap->idcode);
break;
default:
nvp_unknown_command_print(CMD, nvp_config_opts, NULL, CMD_ARGV[i]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
}
return ERROR_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
#define NTAP_OPT_BYPASS 7
#define NTAP_OPT_IRBYPASS 8
static const struct nvp jtag_newtap_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 = "-ignore-bypass", .value = NTAP_OPT_BYPASS },
{ .name = "-ir-bypass", .value = NTAP_OPT_IRBYPASS },
{ .name = NULL, .value = -1 },
};
static COMMAND_HELPER(handle_jtag_newtap_args, struct jtag_tap *tap)
{
/* we expect CHIP + TAP + OPTIONS */
if (CMD_ARGC < 2)
return ERROR_COMMAND_SYNTAX_ERROR;
tap->chip = strdup(CMD_ARGV[0]);
tap->tapname = strdup(CMD_ARGV[1]);
tap->dotted_name = alloc_printf("%s.%s", CMD_ARGV[0], CMD_ARGV[1]);
if (!tap->chip || !tap->tapname || !tap->dotted_name) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
CMD_ARGC -= 2;
CMD_ARGV += 2;
LOG_DEBUG("Creating New Tap, Chip: %s, Tap: %s, Dotted: %s, %d params",
tap->chip, tap->tapname, tap->dotted_name, CMD_ARGC);
/*
* IEEE specifies that the two LSBs of an IR scan are 01, so make
* that the default. The "-ircapture" and "-irmask" options are only
* needed to cope with nonstandard TAPs, or to specify more bits.
*/
tap->ir_capture_mask = 0x03;
tap->ir_capture_value = 0x01;
while (CMD_ARGC) {
const struct nvp *n = nvp_name2value(jtag_newtap_opts, CMD_ARGV[0]);
CMD_ARGC--;
CMD_ARGV++;
switch (n->value) {
case NTAP_OPT_ENABLED:
tap->disabled_after_reset = false;
break;
case NTAP_OPT_DISABLED:
tap->disabled_after_reset = true;
break;
case NTAP_OPT_EXPECTED_ID:
if (!CMD_ARGC)
return ERROR_COMMAND_ARGUMENT_INVALID;
tap->expected_ids = realloc(tap->expected_ids,
(tap->expected_ids_cnt + 1) * sizeof(uint32_t));
if (!tap->expected_ids) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
uint32_t id;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], id);
CMD_ARGC--;
CMD_ARGV++;
tap->expected_ids[tap->expected_ids_cnt++] = id;
break;
case NTAP_OPT_IRLEN:
if (!CMD_ARGC)
return ERROR_COMMAND_ARGUMENT_INVALID;
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tap->ir_length);
CMD_ARGC--;
CMD_ARGV++;
if (tap->ir_length > (int)(8 * sizeof(tap->ir_capture_value)))
LOG_WARNING("%s: huge IR length %d", tap->dotted_name, tap->ir_length);
break;
case NTAP_OPT_IRMASK:
if (!CMD_ARGC)
return ERROR_COMMAND_ARGUMENT_INVALID;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], tap->ir_capture_mask);
CMD_ARGC--;
CMD_ARGV++;
if ((tap->ir_capture_mask & 3) != 3)
LOG_WARNING("%s: nonstandard IR mask", tap->dotted_name);
break;
case NTAP_OPT_IRCAPTURE:
if (!CMD_ARGC)
return ERROR_COMMAND_ARGUMENT_INVALID;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], tap->ir_capture_value);
CMD_ARGC--;
CMD_ARGV++;
if ((tap->ir_capture_value & 3) != 1)
LOG_WARNING("%s: nonstandard IR value", tap->dotted_name);
break;
case NTAP_OPT_VERSION:
tap->ignore_version = true;
break;
case NTAP_OPT_BYPASS:
tap->ignore_bypass = true;
break;
case NTAP_OPT_IRBYPASS:
if (!CMD_ARGC)
return ERROR_COMMAND_ARGUMENT_INVALID;
COMMAND_PARSE_NUMBER(u64, CMD_ARGV[0], tap->ir_bypass_value);
CMD_ARGC--;
CMD_ARGV++;
break;
default:
nvp_unknown_command_print(CMD, jtag_newtap_opts, NULL, CMD_ARGV[-1]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
}
/* default is enabled-after-reset */
tap->enabled = !tap->disabled_after_reset;
if (transport_is_jtag() && tap->ir_length == 0) {
command_print(CMD, "newtap: %s missing IR length", tap->dotted_name);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
return ERROR_OK;
}
__COMMAND_HANDLER(handle_jtag_newtap)
{
struct jtag_tap *tap = calloc(1, sizeof(struct jtag_tap));
if (!tap) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
int retval = CALL_COMMAND_HANDLER(handle_jtag_newtap_args, tap);
if (retval != ERROR_OK) {
free(tap->chip);
free(tap->tapname);
free(tap->dotted_name);
free(tap->expected_ids);
free(tap);
return retval;
}
jtag_tap_init(tap);
return ERROR_OK;
}
static void jtag_tap_handle_event(struct jtag_tap *tap, enum jtag_event e)
{
struct jtag_tap_event_action *jteap;
int retval;
for (jteap = tap->event_action; jteap; jteap = jteap->next) {
if (jteap->event != e)
continue;
const struct nvp *nvp = nvp_value2name(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));
retval = Jim_EvalObj(jteap->interp, jteap->body);
if (retval == JIM_RETURN)
retval = jteap->interp->returnCode;
if (retval != JIM_OK) {
Jim_MakeErrorMessage(jteap->interp);
LOG_USER("%s", Jim_GetString(Jim_GetResult(jteap->interp), NULL));
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;
}
}
}
COMMAND_HANDLER(handle_jtag_arp_init)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
return jtag_init_inner(CMD_CTX);
}
COMMAND_HANDLER(handle_jtag_arp_init_reset)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
if (transport_is_jtag())
return jtag_init_reset(CMD_CTX);
if (transport_is_swd())
return swd_init_reset(CMD_CTX);
return ERROR_OK;
}
static bool jtag_tap_enable(struct jtag_tap *t)
{
if (t->enabled)
return true;
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 true;
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;
}
__COMMAND_HANDLER(handle_jtag_tap_enabler)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
struct jtag_tap *t = jtag_tap_by_string(CMD_ARGV[0]);
if (!t) {
command_print(CMD, "Tap '%s' could not be found", CMD_ARGV[0]);
return ERROR_COMMAND_ARGUMENT_INVALID;
}
if (strcmp(CMD_NAME, "tapisenabled") == 0) {
/* do nothing, just return the value */
} else if (strcmp(CMD_NAME, "tapenable") == 0) {
if (!jtag_tap_enable(t)) {
command_print(CMD, "failed to enable tap %s", t->dotted_name);
return ERROR_FAIL;
}
} else if (strcmp(CMD_NAME, "tapdisable") == 0) {
if (!jtag_tap_disable(t)) {
command_print(CMD, "failed to disable tap %s", t->dotted_name);
return ERROR_FAIL;
}
} else {
command_print(CMD, "command '%s' unknown", CMD_NAME);
return ERROR_FAIL;
}
command_print(CMD, "%d", t->enabled ? 1 : 0);
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_names)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
for (struct jtag_tap *tap = jtag_all_taps(); tap; tap = tap->next_tap)
command_print(CMD, "%s", tap->dotted_name);
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_init_command)
{
if (CMD_ARGC != 0)
return ERROR_COMMAND_SYNTAX_ERROR;
static bool jtag_initialized;
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",
.usage = ""
},
{
.name = "arp_init",
.mode = COMMAND_ANY,
.handler = handle_jtag_arp_init,
.help = "Validates JTAG scan chain against the list of "
"declared TAPs using just the four standard JTAG "
"signals.",
.usage = "",
},
{
.name = "arp_init-reset",
.mode = COMMAND_ANY,
.handler = handle_jtag_arp_init_reset,
.help = "Uses TRST and SRST to try resetting everything on "
"the JTAG scan chain, then performs 'jtag arp_init'.",
.usage = "",
},
{
.name = "newtap",
.mode = COMMAND_CONFIG,
.handler = handle_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'] "
"['-ignore-bypass'] "
"['-ircapture' number] "
"['-ir-bypass' number] "
"['-mask' number]",
},
{
.name = "tapisenabled",
.mode = COMMAND_EXEC,
.handler = handle_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,
.handler = handle_jtag_tap_enabler,
.help = "Try to enable the specified TAP using the "
"'tap-enable' TAP event.",
.usage = "tap_name",
},
{
.name = "tapdisable",
.mode = COMMAND_EXEC,
.handler = handle_jtag_tap_enabler,
.help = "Try to disable the specified TAP using the "
"'tap-disable' TAP event.",
.usage = "tap_name",
},
{
.name = "configure",
.mode = COMMAND_ANY,
.handler = handle_jtag_configure,
.help = "Provide a Tcl handler for the specified "
"TAP event.",
.usage = "tap_name '-event' event_name handler",
},
{
.name = "cget",
.mode = COMMAND_EXEC,
.handler = handle_jtag_configure,
.help = "Return any Tcl handler for the specified "
"TAP event.",
.usage = "tap_name '-event' event_name",
},
{
.name = "names",
.mode = COMMAND_ANY,
.handler = handle_jtag_names,
.help = "Returns list of all JTAG tap names.",
.usage = "",
},
{
.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,
" TapName Enabled IdCode Expected IrLen IrCap IrMask");
command_print(CMD,
"-- ------------------- -------- ---------- ---------- ----- ----- ------");
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,
"%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[ii]);
if (tap->ignore_version)
expected_id[2] = '*';
command_print(CMD,
" %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, "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, "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 = adapter_config_rclk(khz);
if (retval != ERROR_OK)
return retval;
}
int cur_khz = adapter_get_speed_khz();
retval = adapter_get_speed_readable(&cur_khz);
if (retval != ERROR_OK)
return retval;
if (cur_khz)
command_print(CMD, "RCLK not supported - fallback to %d kHz", cur_khz);
else
command_print(CMD, "RCLK - adaptive");
return retval;
}
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;
}
fields = calloc(num_fields, sizeof(*fields));
int retval;
for (i = 0; i < num_fields; i++) {
tap = jtag_tap_by_string(CMD_ARGV[i*2]);
if (!tap) {
free(fields);
command_print(CMD, "Tap: %s unknown", CMD_ARGV[i*2]);
return ERROR_FAIL;
}
uint64_t value;
retval = parse_u64(CMD_ARGV[i * 2 + 1], &value);
if (retval != ERROR_OK)
goto error_return;
int field_size = tap->ir_length;
fields[i].num_bits = field_size;
uint8_t *v = calloc(1, DIV_ROUND_UP(field_size, 8));
if (!v) {
LOG_ERROR("Out of memory");
goto error_return;
}
buf_set_u64(v, 0, field_size, value);
fields[i].out_value = v;
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++)
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, "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, "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, "tms sequence is %s",
tap_uses_new_tms_table() ? "short" : "long");
return ERROR_OK;
}
COMMAND_HANDLER(handle_jtag_flush_queue_sleep)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
int sleep_ms;
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], sleep_ms);
jtag_set_flush_queue_sleep(sleep_ms);
return ERROR_OK;
}
COMMAND_HANDLER(handle_wait_srst_deassert)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
int timeout_ms;
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], timeout_ms);
if ((timeout_ms <= 0) || (timeout_ms > 100000)) {
LOG_ERROR("Timeout must be an integer between 0 and 100000");
return ERROR_FAIL;
}
LOG_USER("Waiting for srst assert + deassert for at most %dms", timeout_ms);
int asserted_yet;
int64_t then = timeval_ms();
while (jtag_srst_asserted(&asserted_yet) == ERROR_OK) {
if ((timeval_ms() - then) > timeout_ms) {
LOG_ERROR("Timed out");
return ERROR_FAIL;
}
if (asserted_yet)
break;
}
while (jtag_srst_asserted(&asserted_yet) == ERROR_OK) {
if ((timeval_ms() - then) > timeout_ms) {
LOG_ERROR("Timed out");
return ERROR_FAIL;
}
if (!asserted_yet)
break;
}
return ERROR_OK;
}
static const struct command_registration jtag_command_handlers[] = {
{
.name = "jtag_flush_queue_sleep",
.handler = handle_jtag_flush_queue_sleep,
.mode = COMMAND_ANY,
.help = "For debug purposes(simulate long delays of interface) "
"to test performance or change in behavior. Default 0ms.",
.usage = "[sleep in ms]",
},
{
.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",
.usage = ""
},
{
.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 (IR) 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 = "wait_srst_deassert",
.handler = handle_wait_srst_deassert,
.mode = COMMAND_ANY,
.help = "Wait for an SRST deassert. "
"Useful for cases where you need something to happen within ms "
"of an srst deassert. Timeout in ms",
.usage = "ms",
},
{
.name = "jtag",
.mode = COMMAND_ANY,
.help = "perform jtag tap actions",
.usage = "",
.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);
}
|