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/******************************************************************************

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 *

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 *  $Id$

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 *

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 *  Copyright (C) 2012  Florian Pose, Ingenieurgemeinschaft IgH

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 *

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 *  This file is part of the IgH EtherCAT Master.

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 *

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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or

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 *  modify it under the terms of the GNU General Public License version 2, as

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 *  published by the Free Software Foundation.

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 *

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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General

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 *  Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License along

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 *  with the IgH EtherCAT Master; if not, write to the Free Software

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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

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 *

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 *  ---

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 *

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 *  The license mentioned above concerns the source code only. Using the

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 *  EtherCAT technology and brand is only permitted in compliance with the

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 *  industrial property and similar rights of Beckhoff Automation GmbH.

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 *

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 *****************************************************************************/

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/**

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   \file

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   EtherCAT register request structure.

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*/

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/*****************************************************************************/

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#ifndef __EC_REG_REQUEST_H__

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#define __EC_REG_REQUEST_H__

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#include <linux/list.h>

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#include "globals.h"

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/*****************************************************************************/

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/** Register request.

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 */

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struct ec_reg_request {

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    struct list_head list; /**< List item. */

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    size_t mem_size; /**< Size of data memory. */

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    uint8_t *data; /**< Pointer to data memory. */

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    ec_direction_t dir; /**< Direction. EC_DIR_OUTPUT means writing to the

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                          slave, EC_DIR_INPUT means reading from the slave. */

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    uint16_t address; /**< Register address. */

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    size_t transfer_size; /**< Size of the data to transfer. */

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    ec_internal_request_state_t state; /**< Request state. */

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    uint16_t ring_position; /**< Ring position for emergency requests. */

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};

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/*****************************************************************************/

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int ec_reg_request_init(ec_reg_request_t *, size_t);

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void ec_reg_request_clear(ec_reg_request_t *);

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/*****************************************************************************/

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#endif