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openocd/src/jtag/adapter.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, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "jtag.h"
#include "minidriver.h"
#include "interface.h"
#include "interfaces.h"
#include <transport/transport.h>
#include <jtag/drivers/jtag_usb_common.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
/**
* @file
* Holds support for configuring debug adapters from TCl scripts.
*/
struct adapter_driver *adapter_driver;
const char * const jtag_only[] = { "jtag", NULL };
static int jim_adapter_name(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
{
Jim_GetOptInfo goi;
Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
/* return the name of the interface */
/* TCL code might need to know the exact type... */
/* FUTURE: we allow this as a means to "set" the interface. */
if (goi.argc != 0) {
Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
return JIM_ERR;
}
const char *name = adapter_driver ? adapter_driver->name : NULL;
Jim_SetResultString(goi.interp, name ? : "undefined", -1);
return JIM_OK;
}
COMMAND_HANDLER(adapter_transports_command)
{
char **transports;
int retval;
retval = CALL_COMMAND_HANDLER(transport_list_parse, &transports);
if (retval != ERROR_OK)
return retval;
retval = allow_transports(CMD_CTX, (const char **)transports);
if (retval != ERROR_OK) {
for (unsigned i = 0; transports[i]; i++)
free(transports[i]);
free(transports);
}
return retval;
}
COMMAND_HANDLER(handle_adapter_list_command)
{
if (strcmp(CMD_NAME, "list") == 0 && CMD_ARGC > 0)
return ERROR_COMMAND_SYNTAX_ERROR;
command_print(CMD, "The following debug adapters are available:");
for (unsigned i = 0; NULL != adapter_drivers[i]; i++) {
const char *name = adapter_drivers[i]->name;
command_print(CMD, "%u: %s", i + 1, name);
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_adapter_driver_command)
{
int retval;
/* check whether the interface is already configured */
if (adapter_driver) {
LOG_WARNING("Interface already configured, ignoring");
return ERROR_OK;
}
/* interface name is a mandatory argument */
if (CMD_ARGC != 1 || CMD_ARGV[0][0] == '\0')
return ERROR_COMMAND_SYNTAX_ERROR;
for (unsigned i = 0; NULL != adapter_drivers[i]; i++) {
if (strcmp(CMD_ARGV[0], adapter_drivers[i]->name) != 0)
continue;
if (NULL != adapter_drivers[i]->commands) {
retval = register_commands(CMD_CTX, NULL,
adapter_drivers[i]->commands);
if (ERROR_OK != retval)
return retval;
}
adapter_driver = adapter_drivers[i];
return allow_transports(CMD_CTX, adapter_driver->transports);
}
/* no valid interface was found (i.e. the configuration option,
* didn't match one of the compiled-in interfaces
*/
LOG_ERROR("The specified debug interface was not found (%s)",
CMD_ARGV[0]);
CALL_COMMAND_HANDLER(handle_adapter_list_command);
return ERROR_JTAG_INVALID_INTERFACE;
}
COMMAND_HANDLER(handle_reset_config_command)
{
int new_cfg = 0;
int mask = 0;
/* Original versions cared about the order of these tokens:
* reset_config signals [combination [trst_type [srst_type]]]
* They also clobbered the previous configuration even on error.
*
* Here we don't care about the order, and only change values
* which have been explicitly specified.
*/
for (; CMD_ARGC; CMD_ARGC--, CMD_ARGV++) {
int tmp = 0;
int m;
/* gating */
m = RESET_SRST_NO_GATING;
if (strcmp(*CMD_ARGV, "srst_gates_jtag") == 0)
/* default: don't use JTAG while SRST asserted */;
else if (strcmp(*CMD_ARGV, "srst_nogate") == 0)
tmp = RESET_SRST_NO_GATING;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"gating", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* signals */
m = RESET_HAS_TRST | RESET_HAS_SRST;
if (strcmp(*CMD_ARGV, "none") == 0)
tmp = RESET_NONE;
else if (strcmp(*CMD_ARGV, "trst_only") == 0)
tmp = RESET_HAS_TRST;
else if (strcmp(*CMD_ARGV, "srst_only") == 0)
tmp = RESET_HAS_SRST;
else if (strcmp(*CMD_ARGV, "trst_and_srst") == 0)
tmp = RESET_HAS_TRST | RESET_HAS_SRST;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"signal", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* combination (options for broken wiring) */
m = RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
if (strcmp(*CMD_ARGV, "separate") == 0)
/* separate reset lines - default */;
else if (strcmp(*CMD_ARGV, "srst_pulls_trst") == 0)
tmp |= RESET_SRST_PULLS_TRST;
else if (strcmp(*CMD_ARGV, "trst_pulls_srst") == 0)
tmp |= RESET_TRST_PULLS_SRST;
else if (strcmp(*CMD_ARGV, "combined") == 0)
tmp |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"combination", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* trst_type (NOP without HAS_TRST) */
m = RESET_TRST_OPEN_DRAIN;
if (strcmp(*CMD_ARGV, "trst_open_drain") == 0)
tmp |= RESET_TRST_OPEN_DRAIN;
else if (strcmp(*CMD_ARGV, "trst_push_pull") == 0)
/* push/pull from adapter - default */;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"trst_type", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* srst_type (NOP without HAS_SRST) */
m = RESET_SRST_PUSH_PULL;
if (strcmp(*CMD_ARGV, "srst_push_pull") == 0)
tmp |= RESET_SRST_PUSH_PULL;
else if (strcmp(*CMD_ARGV, "srst_open_drain") == 0)
/* open drain from adapter - default */;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"srst_type", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* connect_type - only valid when srst_nogate */
m = RESET_CNCT_UNDER_SRST;
if (strcmp(*CMD_ARGV, "connect_assert_srst") == 0)
tmp |= RESET_CNCT_UNDER_SRST;
else if (strcmp(*CMD_ARGV, "connect_deassert_srst") == 0)
/* connect normally - default */;
else
m = 0;
if (mask & m) {
LOG_ERROR("extra reset_config %s spec (%s)",
"connect_type", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (m)
goto next;
/* caller provided nonsense; fail */
LOG_ERROR("unknown reset_config flag (%s)", *CMD_ARGV);
return ERROR_COMMAND_SYNTAX_ERROR;
next:
/* Remember the bits which were specified (mask)
* and their new values (new_cfg).
*/
mask |= m;
new_cfg |= tmp;
}
/* clear previous values of those bits, save new values */
if (mask) {
int old_cfg = jtag_get_reset_config();
old_cfg &= ~mask;
new_cfg |= old_cfg;
jtag_set_reset_config(new_cfg);
} else
new_cfg = jtag_get_reset_config();
/*
* Display the (now-)current reset mode
*/
char *modes[6];
/* minimal JTAG has neither SRST nor TRST (so that's the default) */
switch (new_cfg & (RESET_HAS_TRST | RESET_HAS_SRST)) {
case RESET_HAS_SRST:
modes[0] = "srst_only";
break;
case RESET_HAS_TRST:
modes[0] = "trst_only";
break;
case RESET_TRST_AND_SRST:
modes[0] = "trst_and_srst";
break;
default:
modes[0] = "none";
break;
}
/* normally SRST and TRST are decoupled; but bugs happen ... */
switch (new_cfg & (RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST)) {
case RESET_SRST_PULLS_TRST:
modes[1] = "srst_pulls_trst";
break;
case RESET_TRST_PULLS_SRST:
modes[1] = "trst_pulls_srst";
break;
case RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST:
modes[1] = "combined";
break;
default:
modes[1] = "separate";
break;
}
/* TRST-less connectors include Altera, Xilinx, and minimal JTAG */
if (new_cfg & RESET_HAS_TRST) {
if (new_cfg & RESET_TRST_OPEN_DRAIN)
modes[3] = " trst_open_drain";
else
modes[3] = " trst_push_pull";
} else
modes[3] = "";
/* SRST-less connectors include TI-14, Xilinx, and minimal JTAG */
if (new_cfg & RESET_HAS_SRST) {
if (new_cfg & RESET_SRST_NO_GATING)
modes[2] = " srst_nogate";
else
modes[2] = " srst_gates_jtag";
if (new_cfg & RESET_SRST_PUSH_PULL)
modes[4] = " srst_push_pull";
else
modes[4] = " srst_open_drain";
if (new_cfg & RESET_CNCT_UNDER_SRST)
modes[5] = " connect_assert_srst";
else
modes[5] = " connect_deassert_srst";
} else {
modes[2] = "";
modes[4] = "";
modes[5] = "";
}
command_print(CMD, "%s %s%s%s%s%s",
modes[0], modes[1],
modes[2], modes[3], modes[4], modes[5]);
return ERROR_OK;
}
COMMAND_HANDLER(handle_adapter_srst_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_nsrst_delay(delay);
}
command_print(CMD, "adapter srst delay: %u", jtag_get_nsrst_delay());
return ERROR_OK;
}
COMMAND_HANDLER(handle_adapter_srst_pulse_width_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 1) {
unsigned width;
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], width);
jtag_set_nsrst_assert_width(width);
}
command_print(CMD, "adapter srst pulse_width: %u", jtag_get_nsrst_assert_width());
return ERROR_OK;
}
COMMAND_HANDLER(handle_adapter_speed_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_khz(khz);
if (ERROR_OK != retval)
return retval;
}
int cur_speed = jtag_get_speed_khz();
retval = jtag_get_speed_readable(&cur_speed);
if (ERROR_OK != retval)
return retval;
if (cur_speed)
command_print(CMD, "adapter speed: %d kHz", cur_speed);
else
command_print(CMD, "adapter speed: RCLK - adaptive");
return retval;
}
COMMAND_HANDLER(handle_adapter_reset_de_assert)
{
enum values {
VALUE_UNDEFINED = -1,
VALUE_DEASSERT = 0,
VALUE_ASSERT = 1,
};
enum values value;
enum values srst = VALUE_UNDEFINED;
enum values trst = VALUE_UNDEFINED;
enum reset_types jtag_reset_config = jtag_get_reset_config();
char *signal;
if (CMD_ARGC == 0) {
if (transport_is_jtag()) {
if (jtag_reset_config & RESET_HAS_TRST)
signal = jtag_get_trst() ? "asserted" : "deasserted";
else
signal = "not present";
command_print(CMD, "trst %s", signal);
}
if (jtag_reset_config & RESET_HAS_SRST)
signal = jtag_get_srst() ? "asserted" : "deasserted";
else
signal = "not present";
command_print(CMD, "srst %s", signal);
return ERROR_OK;
}
if (CMD_ARGC != 1 && CMD_ARGC != 3)
return ERROR_COMMAND_SYNTAX_ERROR;
value = (strcmp(CMD_NAME, "assert") == 0) ? VALUE_ASSERT : VALUE_DEASSERT;
if (strcmp(CMD_ARGV[0], "srst") == 0)
srst = value;
else if (strcmp(CMD_ARGV[0], "trst") == 0)
trst = value;
else
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 3) {
if (strcmp(CMD_ARGV[1], "assert") == 0)
value = VALUE_ASSERT;
else if (strcmp(CMD_ARGV[1], "deassert") == 0)
value = VALUE_DEASSERT;
else
return ERROR_COMMAND_SYNTAX_ERROR;
if (strcmp(CMD_ARGV[2], "srst") == 0 && srst == VALUE_UNDEFINED)
srst = value;
else if (strcmp(CMD_ARGV[2], "trst") == 0 && trst == VALUE_UNDEFINED)
trst = value;
else
return ERROR_COMMAND_SYNTAX_ERROR;
}
if (trst == VALUE_UNDEFINED) {
if (transport_is_jtag())
trst = jtag_get_trst() ? VALUE_ASSERT : VALUE_DEASSERT;
else
trst = VALUE_DEASSERT; /* unused, safe value */
}
if (srst == VALUE_UNDEFINED) {
if (jtag_reset_config & RESET_HAS_SRST)
srst = jtag_get_srst() ? VALUE_ASSERT : VALUE_DEASSERT;
else
srst = VALUE_DEASSERT; /* unused, safe value */
}
if (trst == VALUE_ASSERT && !transport_is_jtag()) {
LOG_ERROR("transport has no trst signal");
return ERROR_FAIL;
}
if (srst == VALUE_ASSERT && !(jtag_reset_config & RESET_HAS_SRST)) {
LOG_ERROR("adapter has no srst signal");
return ERROR_FAIL;
}
return adapter_resets((trst == VALUE_DEASSERT) ? TRST_DEASSERT : TRST_ASSERT,
(srst == VALUE_DEASSERT) ? SRST_DEASSERT : SRST_ASSERT);
}
#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
COMMAND_HANDLER(handle_usb_location_command)
{
if (CMD_ARGC == 1)
jtag_usb_set_location(CMD_ARGV[0]);
command_print(CMD, "adapter usb location: %s", jtag_usb_get_location());
return ERROR_OK;
}
#endif /* HAVE_LIBUSB_GET_PORT_NUMBERS */
static const struct command_registration adapter_usb_command_handlers[] = {
#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
{
.name = "location",
.handler = &handle_usb_location_command,
.mode = COMMAND_CONFIG,
.help = "display or set the USB bus location of the USB device",
.usage = "[<bus>-port[.port]...]",
},
#endif /* HAVE_LIBUSB_GET_PORT_NUMBERS */
COMMAND_REGISTRATION_DONE
};
static const struct command_registration adapter_srst_command_handlers[] = {
{
.name = "delay",
.handler = handle_adapter_srst_delay_command,
.mode = COMMAND_ANY,
.help = "delay after deasserting SRST in ms",
.usage = "[milliseconds]",
},
{
.name = "pulse_width",
.handler = handle_adapter_srst_pulse_width_command,
.mode = COMMAND_ANY,
.help = "SRST assertion pulse width in ms",
.usage = "[milliseconds]",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration adapter_command_handlers[] = {
{
.name = "driver",
.handler = handle_adapter_driver_command,
.mode = COMMAND_CONFIG,
.help = "Select a debug adapter driver",
.usage = "driver_name",
},
{
.name = "speed",
.handler = handle_adapter_speed_command,
.mode = COMMAND_ANY,
.help = "With an argument, change to the specified maximum "
"jtag speed. For JTAG, 0 KHz signifies adaptive "
"clocking. "
"With or without argument, display current setting.",
.usage = "[khz]",
},
{
.name = "list",
.handler = handle_adapter_list_command,
.mode = COMMAND_ANY,
.help = "List all built-in debug adapter drivers",
.usage = "",
},
{
.name = "name",
.mode = COMMAND_ANY,
.jim_handler = jim_adapter_name,
.help = "Returns the name of the currently "
"selected adapter (driver)",
},
{
.name = "srst",
.mode = COMMAND_ANY,
.help = "srst adapter command group",
.usage = "",
.chain = adapter_srst_command_handlers,
},
{
.name = "transports",
.handler = adapter_transports_command,
.mode = COMMAND_CONFIG,
.help = "Declare transports the adapter supports.",
.usage = "transport ... ",
},
{
.name = "usb",
.mode = COMMAND_ANY,
.help = "usb adapter command group",
.usage = "",
.chain = adapter_usb_command_handlers,
},
{
.name = "assert",
.handler = handle_adapter_reset_de_assert,
.mode = COMMAND_EXEC,
.help = "Controls SRST and TRST lines.",
.usage = "|deassert [srst|trst [assert|deassert srst|trst]]",
},
{
.name = "deassert",
.handler = handle_adapter_reset_de_assert,
.mode = COMMAND_EXEC,
.help = "Controls SRST and TRST lines.",
.usage = "|assert [srst|trst [deassert|assert srst|trst]]",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration interface_command_handlers[] = {
{
.name = "adapter",
.mode = COMMAND_ANY,
.help = "adapter command group",
.usage = "",
.chain = adapter_command_handlers,
},
{
.name = "reset_config",
.handler = handle_reset_config_command,
.mode = COMMAND_ANY,
.help = "configure adapter reset behavior",
.usage = "[none|trst_only|srst_only|trst_and_srst] "
"[srst_pulls_trst|trst_pulls_srst|combined|separate] "
"[srst_gates_jtag|srst_nogate] "
"[trst_push_pull|trst_open_drain] "
"[srst_push_pull|srst_open_drain] "
"[connect_deassert_srst|connect_assert_srst]",
},
COMMAND_REGISTRATION_DONE
};
/**
* Register the commands which deal with arbitrary debug adapter drivers.
*
* @todo Remove internal assumptions that all debug adapters use JTAG for
* transport. Various types and data structures are not named generically.
*/
int interface_register_commands(struct command_context *ctx)
{
return register_commands(ctx, NULL, interface_command_handlers);
}
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