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

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 *

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 *  $Id$

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 *

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 *  Copyright (C) 2006-2008  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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 *  Using the EtherCAT technology and brand is permitted in compliance with

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 *  the 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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   Vendor specific over EtherCAT protocol handler.

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*/

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

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#ifndef __EC_VOE_HANDLER_H__

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#define __EC_VOE_HANDLER_H__

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#include <linux/list.h>

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#include "globals.h"

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#include "datagram.h"

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

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/** Vendor specific over EtherCAT handler.

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 */

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struct ec_voe_handler {

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

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    ec_slave_config_t *config; /**< Parent slave configuration. */

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    ec_datagram_t datagram; /**< State machine datagram. */

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    uint32_t vendor_id; /**< Vendor ID for the header. */

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    uint16_t vendor_type; /**< Vendor type for the header. */

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    size_t data_size; /**< Size of VoE data. */

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

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                          the slave, EC_DIR_INPUT means reading from the

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                          slave. */

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    void (*state)(ec_voe_handler_t *); /**< State function */

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    ec_internal_request_state_t request_state; /**< Handler state. */

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    unsigned int retries; /**< retries upon datagram timeout */

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    unsigned long jiffies_start; /**< Timestamp for timeout calculation. */

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};

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

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int ec_voe_handler_init(ec_voe_handler_t *, ec_slave_config_t *, size_t);

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void ec_voe_handler_clear(ec_voe_handler_t *);

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size_t ec_voe_handler_mem_size(const ec_voe_handler_t *);

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

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#endif