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

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 *

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 *  $Id: slave_config.c,v 8c63d804ead9 2011/08/11 18:44:18 fp $

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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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    32

/**

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   \file

    34

   EtherCAT slave configuration methods.

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*/

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

    38

    39

#include <linux/slab.h>

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    41

#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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/*****************************************************************************/

    48

    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->allow_overlapping_pdos = 0; // default not allowed

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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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    79

    sc->used_fmmus = 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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/*****************************************************************************/

    93

    94

/** Slave configuration destructor.

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 *

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 * Clears and frees a slave configuration object.

    97

 */

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void ec_slave_config_clear(

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

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        )

   101

{

   102

    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;

   106

   107

    ec_slave_config_detach(sc);

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   109

    // 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, *prev_fmmu;

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    uint32_t fmmu_logical_start_address;

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    size_t tx_size, old_prev_tx_size;

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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->domain_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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    ec_mutex_lock(&sc->master->master_mutex);

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    ec_fmmu_config_init(fmmu, sc, sync_index, dir);

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    fmmu_logical_start_address = domain->tx_size;

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    tx_size = fmmu->data_size;

   186

   187

    // FIXME is it enough to take only the *previous* FMMU into account?

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   189

    if (sc->allow_overlapping_pdos && sc->used_fmmus > 0) {

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        prev_fmmu = &sc->fmmu_configs[sc->used_fmmus - 1];

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        if (fmmu->dir != prev_fmmu->dir && prev_fmmu->tx_size != 0) {

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            // prev fmmu has opposite direction

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            // and is not already paired with prev-prev fmmu

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            old_prev_tx_size = prev_fmmu->tx_size;

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            prev_fmmu->tx_size = max(fmmu->data_size, prev_fmmu->data_size);

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            domain->tx_size += prev_fmmu->tx_size - old_prev_tx_size;

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            tx_size = 0;

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            fmmu_logical_start_address = prev_fmmu->logical_start_address;

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        }

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    }

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    ec_fmmu_config_domain(fmmu, domain, fmmu_logical_start_address, tx_size);

   203

    ec_mutex_unlock(&sc->master->master_mutex);

   204

   205

    sc->used_fmmus++;

   206

    return fmmu->domain_address;

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}

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   209

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

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   211

/** 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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   222

    if (sc->slave)

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        return 0; // already attached

   224

   225

    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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    if (

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#ifdef EC_IDENT_WILDCARDS

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            sc->vendor_id != 0xffffffff &&

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#endif

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            slave->sii.vendor_id != sc->vendor_id

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       ) {

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        EC_CONFIG_DBG(sc, 1, "Slave %u has no matching vendor ID (0x%08X)"

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                " for configuration (0x%08X).\n",

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                slave->ring_position, slave->sii.vendor_id, sc->vendor_id);

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        return -EINVAL;

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    }

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    if (

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#ifdef EC_IDENT_WILDCARDS

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            sc->product_code != 0xffffffff &&

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#endif

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            slave->sii.product_code != sc->product_code

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       ) {

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        EC_CONFIG_DBG(sc, 1, "Slave %u has no matching product code (0x%08X)"

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                " for configuration (0x%08X).\n",

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                slave->ring_position, slave->sii.product_code,

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                sc->product_code);

   259

        return -EINVAL;

   260

    }

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    // attach slave

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    slave->config = sc;

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    sc->slave = slave;

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   266

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

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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. */

   277

        )

   278

{

   279

    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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{

   291

    uint8_t sync_index;

   292

    ec_sync_config_t *sync_config;

   293

    const ec_sync_t *sync;

   294

   295

    if (!sc->slave)

   296

        return;

   297

   298

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

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        sync_config = &sc->sync_configs[sync_index];

   300

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

   301

            sync_config->dir = ec_sync_default_direction(sync);

   302

            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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   312

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

   313

 */

   314

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

   317

        )

   318

{

   319

    unsigned int i;

   320

    const ec_sync_t *sync;

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    const ec_pdo_t *default_pdo;

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   323

    if (!sc->slave)

   324

        return;

   325

   326

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

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            pdo->index);

   328

   329

    // 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++) {

   331

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

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   333

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

   334

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

   335

                continue;

   336

   337

            if (default_pdo->name) {

   338

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

   339

                        default_pdo->name);

   340

   341

                // take PDO name from assigned one

   342

                ec_pdo_set_name(pdo, default_pdo->name);

   343

            }

   344

   345

            // copy entries (= default PDO mapping)

   346

            if (ec_pdo_copy_entries(pdo, default_pdo))

   347

                return;

   348

   349

            if (sc->master->debug_level) {

   350

                const ec_pdo_entry_t *entry;

   351

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

   352

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

   353

                            entry->index, entry->subindex);

   354

                }

   355

            }

   356

   357

            return;

   358

        }

   359

    }

   360

   361

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

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}

   363

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

   365

   366

/** Get the number of SDO configurations.

   367

 *

   368

 * \return Number of SDO configurations.

   369

 */

   370

unsigned int ec_slave_config_sdo_count(

   371

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

   372

        )

   373

{

   374

    const ec_sdo_request_t *req;

   375

    unsigned int count = 0;

   376

   377

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

   378

        count++;

   379

    }

   380

   381

    return count;

   382

}

   383

   384

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

   385

   386

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

   387

 *

   388

 * Const version.

   389

 */

   390

const ec_sdo_request_t *ec_slave_config_get_sdo_by_pos_const(

   391

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

   392

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

   393

        )

   394

{

   395

    const ec_sdo_request_t *req;

   396

   397

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

   398

        if (pos--)

   399

            continue;

   400

        return req;

   401

    }

   402

   403

    return NULL;

   404

}

   405

   406

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

   407

   408

/** Get the number of IDN configurations.

   409

 *

   410

 * \return Number of SDO configurations.

   411

 */

   412

unsigned int ec_slave_config_idn_count(

   413

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

   414

        )

   415

{

   416

    const ec_soe_request_t *req;

   417

    unsigned int count = 0;

   418

   419

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

   420

        count++;

   421

    }

   422

   423

    return count;

   424

}

   425

   426

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

   427

   428

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

   429

 *

   430

 * Const version.

   431

 */

   432

const ec_soe_request_t *ec_slave_config_get_idn_by_pos_const(

   433

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

   434

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

   435

        )

   436

{

   437

    const ec_soe_request_t *req;

   438

   439

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

   440

        if (pos--)

   441

            continue;

   442

        return req;

   443

    }

   444

   445

    return NULL;

   446

}

   447

   448

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

   449

   450

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

   451

 */

   452

ec_sdo_request_t *ec_slave_config_find_sdo_request(

   453

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

   454

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

   455

        )

   456

{

   457

    ec_sdo_request_t *req;

   458

   459

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

   460

        if (pos--)

   461

            continue;

   462

        return req;

   463

    }

   464

   465

    return NULL;

   466

}

   467

   468

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

   469

   470

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

   471

 */

   472

ec_voe_handler_t *ec_slave_config_find_voe_handler(

   473

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

   474

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

   475

        )

   476

{

   477

    ec_voe_handler_t *voe;

   478

   479

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

   480

        if (pos--)

   481

            continue;

   482

        return voe;

   483

    }

   484

   485

    return NULL;

   486

}

   487

   488

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

   489

 *  Application interface

   490

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

   491

   492

int ecrt_slave_config_sync_manager(ec_slave_config_t *sc, uint8_t sync_index,

   493

        ec_direction_t dir, ec_watchdog_mode_t watchdog_mode)

   494

{