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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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 *  vim: expandtab

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 *

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

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/**

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   \file

    34

   EtherCAT slave configuration methods.

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*/

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

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#include <linux/slab.h>

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#include "globals.h"

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#include "master.h"

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#include "voe_handler.h"

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#include "slave_config.h"

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

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    49

/** Slave configuration constructor.

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 *

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 * See ecrt_master_slave_config() for the usage of the \a alias and \a

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 * position parameters.

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 */

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void ec_slave_config_init(

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        ec_slave_config_t *sc, /**< Slave configuration. */

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        ec_master_t *master, /**< EtherCAT master. */

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        uint16_t alias, /**< Slave alias. */

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        uint16_t position, /**< Slave position. */

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        uint32_t vendor_id, /**< Expected vendor ID. */

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        uint32_t product_code /**< Expected product code. */

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        )

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{

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    unsigned int i;

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    sc->master = master;

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    sc->alias = alias;

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    sc->position = position;

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    sc->vendor_id = vendor_id;

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    sc->product_code = product_code;

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    sc->watchdog_divider = 0; // use default

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    sc->watchdog_intervals = 0; // use default

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    sc->slave = NULL;

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    for (i = 0; i < EC_MAX_SYNC_MANAGERS; i++)

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        ec_sync_config_init(&sc->sync_configs[i]);

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    sc->used_fmmus = 0;

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    sc->used_for_fmmu_datagram[EC_DIR_INPUT] = 0;

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    sc->used_for_fmmu_datagram[EC_DIR_OUTPUT] = 0;

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    sc->dc_assign_activate = 0x0000;

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    sc->dc_sync[0].cycle_time = 0x00000000;

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    sc->dc_sync[1].cycle_time = 0x00000000;

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    sc->dc_sync[0].shift_time = 0x00000000;

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    sc->dc_sync[1].shift_time = 0x00000000;

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    INIT_LIST_HEAD(&sc->sdo_configs);

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    INIT_LIST_HEAD(&sc->sdo_requests);

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    INIT_LIST_HEAD(&sc->voe_handlers);

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    INIT_LIST_HEAD(&sc->soe_configs);

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}

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

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/** Slave configuration destructor.

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 *

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 * Clears and frees a slave configuration object.

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 */

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void ec_slave_config_clear(

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        ec_slave_config_t *sc /**< Slave configuration. */

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        )

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{

   104

    unsigned int i;

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    ec_sdo_request_t *req, *next_req;

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    ec_voe_handler_t *voe, *next_voe;

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    ec_soe_request_t *soe, *next_soe;

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   109

    ec_slave_config_detach(sc);

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    // Free sync managers

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    for (i = 0; i < EC_MAX_SYNC_MANAGERS; i++)

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        ec_sync_config_clear(&sc->sync_configs[i]);

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    // free all SDO configurations

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    list_for_each_entry_safe(req, next_req, &sc->sdo_configs, list) {

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        list_del(&req->list);

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        ec_sdo_request_clear(req);

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        kfree(req);

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    }

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    // free all SDO requests

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    list_for_each_entry_safe(req, next_req, &sc->sdo_requests, list) {

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        list_del(&req->list);

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        ec_sdo_request_clear(req);

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        kfree(req);

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    }

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    // free all VoE handlers

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    list_for_each_entry_safe(voe, next_voe, &sc->voe_handlers, list) {

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        list_del(&voe->list);

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        ec_voe_handler_clear(voe);

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        kfree(voe);

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    }

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    // free all SoE configurations

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    list_for_each_entry_safe(soe, next_soe, &sc->soe_configs, list) {

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        list_del(&soe->list);

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        ec_soe_request_clear(soe);

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        kfree(soe);

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    }

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}

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

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/** Prepares an FMMU configuration.

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 *

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 * Configuration data for the FMMU is saved in the slave config structure and

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 * is written to the slave during the configuration. The FMMU configuration

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 * is done in a way, that the complete data range of the corresponding sync

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 * manager is covered. Seperate FMMUs are configured for each domain. If the

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 * FMMU configuration is already prepared, the function does nothing and

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 * returns with success.

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 *

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 * \retval >=0 Success, logical offset byte address.

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 * \retval  <0 Error code.

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 */

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int ec_slave_config_prepare_fmmu(

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        ec_slave_config_t *sc, /**< Slave configuration. */

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        ec_domain_t *domain, /**< Domain. */

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        uint8_t sync_index, /**< Sync manager index. */

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        ec_direction_t dir /**< PDO direction. */

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        )

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{

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    unsigned int i;

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    ec_fmmu_config_t *fmmu;

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    // FMMU configuration already prepared?

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    for (i = 0; i < sc->used_fmmus; i++) {

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        fmmu = &sc->fmmu_configs[i];

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        if (fmmu->domain == domain && fmmu->sync_index == sync_index)

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            return fmmu->logical_start_address;

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    }

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    if (sc->used_fmmus == EC_MAX_FMMUS) {

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        EC_CONFIG_ERR(sc, "FMMU limit reached!\n");

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        return -EOVERFLOW;

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    }

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    fmmu = &sc->fmmu_configs[sc->used_fmmus++];

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    down(&sc->master->master_sem);

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    ec_fmmu_config_init(fmmu, sc, domain, sync_index, dir);

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    up(&sc->master->master_sem);

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    return fmmu->logical_start_address;

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}

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   189

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

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/** Attaches the configuration to the addressed slave object.

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 *

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 * \retval  0 Success.

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 * \retval <0 Error code.

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 */

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int ec_slave_config_attach(

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        ec_slave_config_t *sc /**< Slave configuration. */

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        )

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{

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    ec_slave_t *slave;

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    if (sc->slave)

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        return 0; // already attached

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    if (!(slave = ec_master_find_slave(

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                    sc->master, sc->alias, sc->position))) {

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        EC_CONFIG_DBG(sc, 1, "Failed to find slave for configuration.\n");

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        return -ENOENT;

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    }

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    if (slave->config) {

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        EC_CONFIG_DBG(sc, 1, "Failed to attach configuration. Slave %u"

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                " already has a configuration!\n", slave->ring_position);

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        return -EEXIST;

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    }

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   239

        return -EINVAL;

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    }

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    // attach slave

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    slave->config = sc;

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    sc->slave = slave;

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   246

    EC_CONFIG_DBG(sc, 1, "Attached slave %u.\n", slave->ring_position);

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    return 0;

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}

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   250

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

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/** Detaches the configuration from a slave object.

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 */

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void ec_slave_config_detach(

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        ec_slave_config_t *sc /**< Slave configuration. */

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        )

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{

   258

    if (sc->slave) {

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        sc->slave->config = NULL;

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        sc->slave = NULL;

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    }

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}

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

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/** Loads the default PDO assignment from the slave object.

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 */

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void ec_slave_config_load_default_sync_config(ec_slave_config_t *sc)

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{

   270

    uint8_t sync_index;

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    ec_sync_config_t *sync_config;

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    const ec_sync_t *sync;

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   274

    if (!sc->slave)

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        return;

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   277

    for (sync_index = 0; sync_index < EC_MAX_SYNC_MANAGERS; sync_index++) {

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        sync_config = &sc->sync_configs[sync_index];

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        if ((sync = ec_slave_get_sync(sc->slave, sync_index))) {

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            sync_config->dir = ec_sync_default_direction(sync);

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            if (sync_config->dir == EC_DIR_INVALID)

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                EC_SLAVE_WARN(sc->slave,

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                        "SM%u has an invalid direction field!\n", sync_index);

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            ec_pdo_list_copy(&sync_config->pdos, &sync->pdos);

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        }

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    }

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}

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

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/** Loads the default mapping for a PDO from the slave object.

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 */

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void ec_slave_config_load_default_mapping(

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        const ec_slave_config_t *sc,

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        ec_pdo_t *pdo

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        )

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{

   298

    unsigned int i;

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    const ec_sync_t *sync;

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    const ec_pdo_t *default_pdo;

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   302

    if (!sc->slave)

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        return;

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    EC_CONFIG_DBG(sc, 1, "Loading default mapping for PDO 0x%04X.\n",

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            pdo->index);

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    // find PDO in any sync manager (it could be reassigned later)

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    for (i = 0; i < sc->slave->sii.sync_count; i++) {

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        sync = &sc->slave->sii.syncs[i];

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        list_for_each_entry(default_pdo, &sync->pdos.list, list) {

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            if (default_pdo->index != pdo->index)

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                continue;

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   316

            if (default_pdo->name) {

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                EC_CONFIG_DBG(sc, 1, "Found PDO name \"%s\".\n",

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                        default_pdo->name);

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                // take PDO name from assigned one

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                ec_pdo_set_name(pdo, default_pdo->name);

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            }

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            // copy entries (= default PDO mapping)

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            if (ec_pdo_copy_entries(pdo, default_pdo))

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                return;

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   328

            if (sc->master->debug_level) {

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                const ec_pdo_entry_t *entry;

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                list_for_each_entry(entry, &pdo->entries, list) {

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                    EC_CONFIG_DBG(sc, 1, "Entry 0x%04X:%02X.\n",

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                            entry->index, entry->subindex);

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                }

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            }

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            return;

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        }

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    }

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    EC_CONFIG_DBG(sc, 1, "No default mapping found.\n");

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}

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

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/** Get the number of SDO configurations.

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 *

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 * \return Number of SDO configurations.

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 */

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unsigned int ec_slave_config_sdo_count(

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        const ec_slave_config_t *sc /**< Slave configuration. */

   351

        )

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{

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    const ec_sdo_request_t *req;

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    unsigned int count = 0;

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    list_for_each_entry(req, &sc->sdo_configs, list) {

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        count++;

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    }

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    return count;

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}

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

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   365

/** Finds an SDO configuration via its position in the list.

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 *

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 * Const version.

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 */

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const ec_sdo_request_t *ec_slave_config_get_sdo_by_pos_const(

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        const ec_slave_config_t *sc, /**< Slave configuration. */

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        unsigned int pos /**< Position in the list. */

   372

        )

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{

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    const ec_sdo_request_t *req;

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    list_for_each_entry(req, &sc->sdo_configs, list) {

   377

        if (pos--)

   378

            continue;

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        return req;

   380

    }

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   382

    return NULL;

   383

}

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   385

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

   386

   387

/** Get the number of IDN configurations.

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 *

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 * \return Number of SDO configurations.

   390

 */

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unsigned int ec_slave_config_idn_count(

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        const ec_slave_config_t *sc /**< Slave configuration. */

   393

        )

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{

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    const ec_soe_request_t *req;

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    unsigned int count = 0;

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   398

    list_for_each_entry(req, &sc->soe_configs, list) {

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        count++;

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    }

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   402

    return count;

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}

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

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/** Finds an IDN configuration via its position in the list.

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 *

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 * Const version.

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 */

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const ec_soe_request_t *ec_slave_config_get_idn_by_pos_const(

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        const ec_slave_config_t *sc, /**< Slave configuration. */

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        unsigned int pos /**< Position in the list. */

   414

        )

   415

{

   416

    const ec_soe_request_t *req;

   417

   418

    list_for_each_entry(req, &sc->soe_configs, list) {

   419

        if (pos--)

   420

            continue;

   421

        return req;

   422

    }

   423

   424

    return NULL;

   425

}

   426

   427

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

   428

   429

/** Finds a VoE handler via its position in the list.

   430

 */

   431

ec_sdo_request_t *ec_slave_config_find_sdo_request(

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        ec_slave_config_t *sc, /**< Slave configuration. */

   433

        unsigned int pos /**< Position in the list. */

   434

        )

   435

{

   436

    ec_sdo_request_t *req;

   437

   438

    list_for_each_entry(req, &sc->sdo_requests, list) {

   439

        if (pos--)

   440

            continue;

   441

        return req;

   442

    }

   443

   444

    return NULL;

   445

}

   446

   447

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

   448

   449

/** Finds a VoE handler via its position in the list.

   450

 */

   451

ec_voe_handler_t *ec_slave_config_find_voe_handler(

   452

        ec_slave_config_t *sc, /**< Slave configuration. */

   453

        unsigned int pos /**< Position in the list. */

   454

        )

   455

{

   456

    ec_voe_handler_t *voe;

   457

   458

    list_for_each_entry(voe, &sc->voe_handlers, list) {

   459

        if (pos--)

   460

            continue;

   461

        return voe;

   462

    }

   463

   464

    return NULL;

   465

}

   466

   467

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

   468

 *  Application interface

   469

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

   470

   471

int ecrt_slave_config_sync_manager(ec_slave_config_t *sc, uint8_t sync_index,

   472

        ec_direction_t dir, ec_watchdog_mode_t watchdog_mode)

   473

{

   474

    ec_sync_config_t *sync_config;

   475

   476

    EC_CONFIG_DBG(sc, 1, "ecrt_slave_config_sync_manager(sc = 0x%p,"

   477

            " sync_index = %u, dir = %i, watchdog_mode = %i)\n",

   478

            sc, sync_index, dir, watchdog_mode);

   479

   480

    if (sync_index >= EC_MAX_SYNC_MANAGERS) {

   481

        EC_CONFIG_ERR(sc, "Invalid sync manager index %u!\n", sync_index);

   482

        return -ENOENT;

   483

    }

   484

   485

    if (dir != EC_DIR_OUTPUT && dir != EC_DIR_INPUT) {

   486

        EC_CONFIG_ERR(sc, "Invalid direction %u!\n", (unsigned int) dir);

   487

        return -EINVAL;

   488

    }

   489

   490

    sync_config = &sc->sync_configs[sync_index];

   491

    sync_config->dir = dir;

   492

    sync_config->watchdog_mode = watchdog_mode;

   493

    return 0;

   494

}

   495