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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
* Author(s): Antonio Borneo <borneo.antonio@gmail.com> for STMicroelectronics
*/
/**
* @file
* Utilities to support in-circuit debuggers that provide APIs to access
* directly ARM DAP, hiding the access to the underlining transport used
* for the physical connection (either JTAG or SWD).
* E.g. STMicroelectronics ST-Link/V2 (from version V2J24) and STLINK-V3.
*
* Single-DAP support only.
*
* For details, see "ARM IHI 0031A"
* ARM Debug Interface v5 Architecture Specification
*
* FIXME: in JTAG mode, trst is not managed
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jtag/interface.h>
#include <jtag/tcl.h>
#include <transport/transport.h>
COMMAND_HANDLER(dapdirect_jtag_empty_command)
{
LOG_DEBUG("dapdirect_jtag_empty_command(\"%s\")", CMD_NAME);
return ERROR_OK;
}
COMMAND_HANDLER(dapdirect_jtag_reset_command)
{
enum reset_types jtag_reset_config = jtag_get_reset_config();
/*
* in case the adapter has not already handled asserting srst
* we will attempt it again
*/
if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
if (jtag_reset_config & RESET_SRST_NO_GATING) {
adapter_assert_reset();
return ERROR_OK;
}
LOG_WARNING("\'srst_nogate\' reset_config option is required");
}
adapter_deassert_reset();
return ERROR_OK;
}
static const struct command_registration dapdirect_jtag_subcommand_handlers[] = {
{
.name = "newtap",
.mode = COMMAND_CONFIG,
.handler = handle_jtag_newtap,
.help = "declare a new TAP",
.usage = "basename tap_type '-irlen' count "
"['-enable'|'-disable'] "
"['-expected_id' number] "
"['-ignore-version'] "
"['-ignore-bypass'] "
"['-ircapture' number] "
"['-ir-bypass' number] "
"['-mask' number]",
},
{
.name = "init",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_empty_command,
.usage = ""
},
{
.name = "arp_init",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_empty_command,
.usage = ""
},
{
.name = "arp_init-reset",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_reset_command,
.usage = ""
},
{
.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 = dapdirect_jtag_empty_command,
.usage = "",
},
{
.name = "configure",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_empty_command,
.usage = "",
},
{
.name = "cget",
.mode = COMMAND_EXEC,
.handler = handle_jtag_configure,
.usage = "",
},
{
.name = "names",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_empty_command,
.usage = "",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration dapdirect_jtag_handlers[] = {
{
.name = "jtag",
.mode = COMMAND_ANY,
.chain = dapdirect_jtag_subcommand_handlers,
.usage = "",
},
{
.name = "jtag_ntrst_delay",
.mode = COMMAND_ANY,
.handler = dapdirect_jtag_empty_command,
.usage = "",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration dapdirect_swd_subcommand_handlers[] = {
{
.name = "newdap",
.mode = COMMAND_CONFIG,
.handler = handle_jtag_newtap,
.help = "declare a new SWD DAP",
.usage = "basename dap_type ['-irlen' count] "
"['-enable'|'-disable'] "
"['-expected_id' number] "
"['-ignore-version'] "
"['-ignore-bypass'] "
"['-ircapture' number] "
"['-ir-bypass' number] "
"['-mask' number]",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration dapdirect_swd_handlers[] = {
{
.name = "swd",
.mode = COMMAND_ANY,
.help = "SWD command group",
.usage = "",
.chain = dapdirect_swd_subcommand_handlers,
},
COMMAND_REGISTRATION_DONE
};
static int dapdirect_jtag_select(struct command_context *ctx)
{
LOG_DEBUG("dapdirect_jtag_select()");
return register_commands(ctx, NULL, dapdirect_jtag_handlers);
}
static int dapdirect_swd_select(struct command_context *ctx)
{
LOG_DEBUG("dapdirect_swd_select()");
return register_commands(ctx, NULL, dapdirect_swd_handlers);
}
static int dapdirect_init(struct command_context *ctx)
{
enum reset_types jtag_reset_config = jtag_get_reset_config();
LOG_DEBUG("dapdirect_init()");
if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
if (jtag_reset_config & RESET_SRST_NO_GATING)
adapter_assert_reset();
else
LOG_WARNING("\'srst_nogate\' reset_config option is required");
} else
adapter_deassert_reset();
return ERROR_OK;
}
static struct transport dapdirect_jtag_transport = {
.name = "dapdirect_jtag",
.select = dapdirect_jtag_select,
.init = dapdirect_init,
};
static struct transport dapdirect_swd_transport = {
.name = "dapdirect_swd",
.select = dapdirect_swd_select,
.init = dapdirect_init,
};
static void dapdirect_constructor(void) __attribute__((constructor));
static void dapdirect_constructor(void)
{
transport_register(&dapdirect_jtag_transport);
transport_register(&dapdirect_swd_transport);
}
/**
* Returns true if the current debug session
* is using JTAG as its transport.
*/
bool transport_is_dapdirect_jtag(void)
{
return get_current_transport() == &dapdirect_jtag_transport;
}
/**
* Returns true if the current debug session
* is using SWD as its transport.
*/
bool transport_is_dapdirect_swd(void)
{
return get_current_transport() == &dapdirect_swd_transport;
}
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