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/*
* Copyright (c) 2010 by David Brownell
* Copyright (C) 2011 Tomasz Boleslaw CEDRO (http://www.tomek.cedro.info)
*
* 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/>.
*/
#ifndef OPENOCD_TRANSPORT_TRANSPORT_H
#define OPENOCD_TRANSPORT_TRANSPORT_H
#include "helper/command.h"
/**
* Wrapper for transport lifecycle operations.
*
* OpenOCD talks to targets through some kind of debugging
* or programming adapter, using some protocol that probably
* has target-specific aspects.
*
* A "transport" reflects electrical protocol to the target,
* e..g jtag, swd, spi, uart, ... NOT the messaging protocols
* layered over it (e.g. JTAG has eICE, CoreSight, Nexus, OnCE,
* and more).
*
* In addition to the lifecycle operations packaged by this
* structure, a transport also involves an interface supported
* by debug adapters and used by components such as debug targets.
* For non-debug transports, there may be interfaces used to
* write to flash chips.
*/
struct transport {
/**
* Each transport has a unique name, used to select it
* from among the alternatives. Examples might include
* "jtag", * "swd", "AVR_ISP" and more.
*/
const char *name;
/**
* When a transport is selected, this method registers
* its commands and activates the transport (e.g. resets
* the link).
*
* After those commands are registered, they will often
* be used for further configuration of the debug link.
*/
int (*select)(struct command_context *ctx);
/**
* server startup uses this method to validate transport
* configuration. (For example, with JTAG this interrogates
* the scan chain against the list of expected TAPs.)
*/
int (*init)(struct command_context *ctx);
/**
* Optional. If defined, allows transport to override target
* name prior to initialisation.
*
* @returns ERROR_OK on success, or an error code on failure.
*/
int (*override_target)(const char **targetname);
/**
* Transports are stored in a singly linked list.
*/
struct transport *next;
};
int transport_register(struct transport *new_transport);
struct transport *get_current_transport(void);
int transport_register_commands(struct command_context *ctx);
COMMAND_HELPER(transport_list_parse, char ***vector);
int allow_transports(struct command_context *ctx, const char * const *vector);
bool transports_are_declared(void);
#endif /* OPENOCD_TRANSPORT_TRANSPORT_H */
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