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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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 *  ---

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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 domain structure.

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*/

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

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#ifndef __EC_DOMAIN_H__

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#define __EC_DOMAIN_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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#include "master.h"

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#include "fmmu_config.h"

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

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/** EtherCAT domain.

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 *

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 * Handles the process data and the therefore needed datagrams of a certain

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 * group of slaves.

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 */

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struct ec_domain

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{

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

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    ec_master_t *master; /**< EtherCAT master owning the domain. */

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    unsigned int index; /**< Index (just a number). */

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    struct list_head fmmu_configs; /**< FMMU configurations contained. */

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    size_t data_size; /**< Size of the process data. */

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    uint8_t *data; /**< Memory for the process data. */

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    ec_origin_t data_origin; /**< Origin of the \a data memory. */

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    uint32_t logical_base_address; /**< Logical offset address of the

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                                     process data. */

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    struct list_head datagram_pairs; /**< Datagrams pairs (main/backup) for

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                                       process data exchange. */

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    uint16_t working_counter[EC_MAX_NUM_DEVICES]; /**< Last working counter

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                                                values. */

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    uint16_t expected_working_counter; /**< Expected working counter. */

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    unsigned int working_counter_changes; /**< Working counter changes

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                                             since last notification. */

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    unsigned int redundancy_active; /**< Non-zero, if redundancy is in use. */

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    unsigned long notify_jiffies; /**< Time of last notification. */

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};

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

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void ec_domain_init(ec_domain_t *, ec_master_t *, unsigned int);

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void ec_domain_clear(ec_domain_t *);

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void ec_domain_add_fmmu_config(ec_domain_t *, ec_fmmu_config_t *);

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int ec_domain_finish(ec_domain_t *, uint32_t);

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unsigned int ec_domain_fmmu_count(const ec_domain_t *);

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const ec_fmmu_config_t *ec_domain_find_fmmu(const ec_domain_t *, unsigned int);

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

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#endif