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

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 *

     3

 *  $Id$

     4

 *

     5

 *  Copyright (C) 2006  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

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 *  and/or modify it under the terms of the GNU General Public License

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 *  as published by the Free Software Foundation; either version 2 of the

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 *  License, or (at your option) any later version.

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 *

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

    15

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

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

    19

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

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 *  along 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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 *  The right to use EtherCAT Technology is granted and comes free of

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 *  charge under condition of compatibility of product made by

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 *  Licensee. People intending to distribute/sell products based on the

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 *  code, have to sign an agreement to guarantee that products using

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 *  software based on IgH EtherCAT master stay compatible with the actual

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 *  EtherCAT specification (which are released themselves as an open

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 *  standard) as the (only) precondition to have the right to use EtherCAT

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 *  Technology, IP and trade marks.

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 *

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

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    34

/**

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   \file

    36

   EtherCAT slave state machines.

    37

*/

    38

    39

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

    40

    41

#include "globals.h"

    42

#include "master.h"

    43

#include "mailbox.h"

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#include "fsm_slave.h"

    45

#include "fsm_mapping.h"

    46

    47

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

    48

    49

void ec_fsm_slave_scan_state_start(ec_fsm_slave_t *);

    50

void ec_fsm_slave_scan_state_address(ec_fsm_slave_t *);

    51

void ec_fsm_slave_scan_state_state(ec_fsm_slave_t *);

    52

void ec_fsm_slave_scan_state_base(ec_fsm_slave_t *);

    53

void ec_fsm_slave_scan_state_datalink(ec_fsm_slave_t *);

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void ec_fsm_slave_scan_state_eeprom_size(ec_fsm_slave_t *);

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void ec_fsm_slave_scan_state_eeprom_data(ec_fsm_slave_t *);

    56

    57

void ec_fsm_slave_conf_state_start(ec_fsm_slave_t *);

    58

void ec_fsm_slave_conf_state_init(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_clear_fmmus(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_mbox_sync(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_preop(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_pdo_sync(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_fmmu(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_sdoconf(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_mapconf(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_saveop(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_state_op(ec_fsm_slave_t *);

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    69

void ec_fsm_slave_conf_enter_mbox_sync(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_preop(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_pdo_sync(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_fmmu(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_sdoconf(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_mapconf(ec_fsm_slave_t *);

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void ec_fsm_slave_conf_enter_saveop(ec_fsm_slave_t *);

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    77

void ec_fsm_slave_state_end(ec_fsm_slave_t *);

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void ec_fsm_slave_state_error(ec_fsm_slave_t *);

    79

    80

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

    81

    82

/**

    83

   Constructor.

    84

*/

    85

    86

void ec_fsm_slave_init(ec_fsm_slave_t *fsm, /**< slave state machine */

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        ec_datagram_t *datagram /**< datagram structure to use */

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        )

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{

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    fsm->datagram = datagram;

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    // init sub state machines

    93

    ec_fsm_sii_init(&fsm->fsm_sii, fsm->datagram);

    94

    ec_fsm_change_init(&fsm->fsm_change, fsm->datagram);

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    ec_fsm_coe_init(&fsm->fsm_coe, fsm->datagram);

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    ec_fsm_mapping_init(&fsm->fsm_map, &fsm->fsm_coe);

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}

    98

    99

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

   100

   101

/**

   102

   Destructor.

   103

*/

   104

   105

void ec_fsm_slave_clear(ec_fsm_slave_t *fsm /**< slave state machine */)

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{

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    // clear sub state machines

   108

    ec_fsm_sii_clear(&fsm->fsm_sii);

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    ec_fsm_change_clear(&fsm->fsm_change);

   110

    ec_fsm_coe_clear(&fsm->fsm_coe);

   111

    ec_fsm_mapping_clear(&fsm->fsm_map);

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}

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   114

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

   115

   116

/**

   117

 * Start slave scan state machine.

   118

 */

   119

   120

void ec_fsm_slave_start_scan(ec_fsm_slave_t *fsm, /**< slave state machine */

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        ec_slave_t *slave /**< slave to configure */

   122

        )

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{

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    fsm->slave = slave;

   125

    fsm->state = ec_fsm_slave_scan_state_start;

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}

   127

   128

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

   129

   130

/**

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 * Start slave configuration state machine.

   132

 */

   133

   134

void ec_fsm_slave_start_conf(ec_fsm_slave_t *fsm, /**< slave state machine */

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        ec_slave_t *slave /**< slave to configure */

   136

        )

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{

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    fsm->slave = slave;

   139

    fsm->state = ec_fsm_slave_conf_state_start;

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}

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

   143

   144

/**

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   \return false, if state machine has terminated

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*/

   147

   148

int ec_fsm_slave_running(const ec_fsm_slave_t *fsm /**< slave state machine */)

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{

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    return fsm->state != ec_fsm_slave_state_end

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        && fsm->state != ec_fsm_slave_state_error;

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}

   153

   154

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

   155

   156

/**

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   Executes the current state of the state machine.

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   If the state machine's datagram is not sent or received yet, the execution

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   of the state machine is delayed to the next cycle.

   160

   \return false, if state machine has terminated

   161

*/

   162

   163

int ec_fsm_slave_exec(ec_fsm_slave_t *fsm /**< slave state machine */)

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{

   165

    if (fsm->datagram->state == EC_DATAGRAM_SENT

   166

        || fsm->datagram->state == EC_DATAGRAM_QUEUED) {

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        // datagram was not sent or received yet.

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        return ec_fsm_slave_running(fsm);

   169

    }

   170

   171

    fsm->state(fsm);

   172

    return ec_fsm_slave_running(fsm);

   173

}

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   175

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

   176

   177

/**

   178

   \return true, if the state machine terminated gracefully

   179

*/

   180

   181

int ec_fsm_slave_success(const ec_fsm_slave_t *fsm /**< slave state machine */)

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{

   183

    return fsm->state == ec_fsm_slave_state_end;

   184

}

   185

   186

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

   187

 *  slave scan state machine

   188

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

   189

   190

/**

   191

   Slave scan state: START.

   192

   First state of the slave state machine. Writes the station address to the

   193

   slave, according to its ring position.

   194

*/

   195

   196

void ec_fsm_slave_scan_state_start(ec_fsm_slave_t *fsm /**< slave state machine */)

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{

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    // write station address

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    ec_datagram_apwr(fsm->datagram, fsm->slave->ring_position, 0x0010, 2);

   200

    EC_WRITE_U16(fsm->datagram->data, fsm->slave->station_address);

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    fsm->retries = EC_FSM_RETRIES;

   202

    fsm->state = ec_fsm_slave_scan_state_address;

   203

}

   204

   205

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

   206

   207

/**

   208

   Slave scan state: ADDRESS.

   209

*/

   210

   211

void ec_fsm_slave_scan_state_address(ec_fsm_slave_t *fsm /**< slave state machine */)

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{

   213

    ec_datagram_t *datagram = fsm->datagram;

   214

   215

    if (datagram->state == EC_DATAGRAM_TIMED_OUT && fsm->retries--)

   216

        return;

   217

   218

    if (datagram->state != EC_DATAGRAM_RECEIVED) {

   219

        fsm->state = ec_fsm_slave_state_error;

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        EC_ERR("Failed to receive station address datagram for slave %i"

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                " (datagram state %i)\n",

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                fsm->slave->ring_position, datagram->state);

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        return;

   224

    }

   225

   226

    if (datagram->working_counter != 1) {

   227

        fsm->slave->error_flag = 1;

   228

        fsm->state = ec_fsm_slave_state_error;

   229

        EC_ERR("Failed to write station address - slave %i did not respond.\n",

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               fsm->slave->ring_position);

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        return;

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    }

   233

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    // Read AL state

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    ec_datagram_nprd(datagram, fsm->slave->station_address, 0x0130, 2);

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    fsm->retries = EC_FSM_RETRIES;

   237

    fsm->state = ec_fsm_slave_scan_state_state;

   238

}

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   240

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

   241

   242

/**

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   Slave scan state: STATE.

   244

*/

   245

   246

void ec_fsm_slave_scan_state_state(ec_fsm_slave_t *fsm /**< slave state machine */)

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{

   248

    ec_datagram_t *datagram = fsm->datagram;

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    ec_slave_t *slave = fsm->slave;

   250

   251

    if (datagram->state == EC_DATAGRAM_TIMED_OUT && fsm->retries--)

   252

        return;

   253

   254

    if (datagram->state != EC_DATAGRAM_RECEIVED) {

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        fsm->state = ec_fsm_slave_state_error;

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        EC_ERR("Failed to receive AL state datagram from slave %i"

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                " (datagram state %i).\n",

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               fsm->slave->ring_position, datagram->state);

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        return;

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    }

   261

   262

    if (datagram->working_counter != 1) {

   263

        fsm->slave->error_flag = 1;

   264

        fsm->state = ec_fsm_slave_state_error;

   265

        EC_ERR("Failed to read AL state - slave %i did not respond.\n",

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               fsm->slave->ring_position);

   267

        return;

   268

    }

   269

   270

    slave->current_state = EC_READ_U8(datagram->data);

   271

    if (slave->current_state & EC_SLAVE_STATE_ACK_ERR) {

   272

        char state_str[EC_STATE_STRING_SIZE];

   273

        ec_state_string(slave->current_state, state_str);

   274

        EC_WARN("Slave %i has state error bit set (%s)!\n",

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                slave->ring_position, state_str);

   276

    }

   277

   278

    // read base data

   279

    ec_datagram_nprd(datagram, fsm->slave->station_address, 0x0000, 6);

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    fsm->retries = EC_FSM_RETRIES;

   281

    fsm->state = ec_fsm_slave_scan_state_base;

   282

}

   283

   284

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

   285

   286

/**

   287

   Slave scan state: BASE.

   288

*/

   289

   290

void ec_fsm_slave_scan_state_base(ec_fsm_slave_t *fsm /**< slave state machine */)

   291

{

   292

    ec_datagram_t *datagram = fsm->datagram;

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    ec_slave_t *slave = fsm->slave;

   294

   295

    if (datagram->state == EC_DATAGRAM_TIMED_OUT && fsm->retries--)

   296

        return;

   297

   298

    if (datagram->state != EC_DATAGRAM_RECEIVED) {

   299

        fsm->state = ec_fsm_slave_state_error;

   300

        EC_ERR("Failed to receive base data datagram for slave %i"

   301

                " (datagram state %i).\n",

   302

               slave->ring_position, datagram->state);

   303

        return;

   304

    }

   305

   306

    if (datagram->working_counter != 1) {

   307

        fsm->slave->error_flag = 1;

   308

        fsm->state = ec_fsm_slave_state_error;

   309

        EC_ERR("Failed to read base data - slave %i did not respond.\n",

   310

               slave->ring_position);

   311

        return;

   312

    }

   313

   314

    slave->base_type       = EC_READ_U8 (datagram->data);

   315

    slave->base_revision   = EC_READ_U8 (datagram->data + 1);

   316

    slave->base_build      = EC_READ_U16(datagram->data + 2);

   317

    slave->base_fmmu_count = EC_READ_U8 (datagram->data + 4);

   318

   319

    if (slave->base_fmmu_count > EC_MAX_FMMUS)

   320

        slave->base_fmmu_count = EC_MAX_FMMUS;

   321

   322

    // read data link status

   323

    ec_datagram_nprd(datagram, slave->station_address, 0x0110, 2);

   324

    fsm->retries = EC_FSM_RETRIES;

   325

    fsm->state = ec_fsm_slave_scan_state_datalink;

   326

}

   327

   328

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

   329

   330

/**

   331

   Slave scan state: DATALINK.

   332

*/

   333

   334

void ec_fsm_slave_scan_state_datalink(ec_fsm_slave_t *fsm /**< slave state machine */)

   335

{

   336

    ec_datagram_t *datagram = fsm->datagram;

   337

    ec_slave_t *slave = fsm->slave;

   338

    uint16_t dl_status;

   339

    unsigned int i;

   340

   341

    if (datagram->state == EC_DATAGRAM_TIMED_OUT && fsm->retries--)

   342

        return;

   343

   344

    if (datagram->state != EC_DATAGRAM_RECEIVED) {

   345

        fsm->state = ec_fsm_slave_state_error;

   346

        EC_ERR("Failed to receive DL status datagram from slave %i"

   347

                " (datagram state %i).\n",

   348

               slave->ring_position, datagram->state);

   349

        return;

   350

    }

   351

   352

    if (datagram->working_counter != 1) {

   353

        fsm->slave->error_flag = 1;

   354

        fsm->state = ec_fsm_slave_state_error;

   355

        EC_ERR("Failed to read DL status - slave %i did not respond.\n",

   356

               slave->ring_position);

   357

        return;

   358

    }

   359

   360

    dl_status = EC_READ_U16(datagram->data);

   361

    for (i = 0; i < 4; i++) {

   362

        slave->dl_link[i] = dl_status & (1 << (4 + i)) ? 1 : 0;

   363

        slave->dl_loop[i] = dl_status & (1 << (8 + i * 2)) ? 1 : 0;

   364

        slave->dl_signal[i] = dl_status & (1 << (9 + i * 2)) ? 1 : 0;

   365

    }

   366

   367

    // Start fetching EEPROM size

   368

   370

    ec_fsm_sii_read(&fsm->fsm_sii, slave, fsm->sii_offset, EC_FSM_SII_NODE);

   371

    fsm->state = ec_fsm_slave_scan_state_eeprom_size;

   372

    fsm->state(fsm); // execute state immediately

   373

}

   374

   375

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

   376

   377

/**

   378

   Slave scan state: EEPROM SIZE.

   379

*/

   380

   381

void ec_fsm_slave_scan_state_eeprom_size(ec_fsm_slave_t *fsm /**< slave state machine */)

   382

{

   383

    ec_slave_t *slave = fsm->slave;

   384

    uint16_t cat_type, cat_size;

   385

   386

    if (ec_fsm_sii_exec(&fsm->fsm_sii)) return;

   387

   388

    if (!ec_fsm_sii_success(&fsm->fsm_sii)) {

   389

        fsm->slave->error_flag = 1;

   390

        fsm->state = ec_fsm_slave_state_error;

   391

        EC_ERR("Failed to read EEPROM size of slave %i.\n",

   392

               slave->ring_position);

   393

        return;

   394

    }

   395

   396

    cat_type = EC_READ_U16(fsm->fsm_sii.value);

   397

    cat_size = EC_READ_U16(fsm->fsm_sii.value + 2);

   398

   399

    if (cat_type != 0xFFFF) { // not the last category

   400

        fsm->sii_offset += cat_size + 2;

   408

        ec_fsm_sii_read(&fsm->fsm_sii, slave, fsm->sii_offset,

   409

                        EC_FSM_SII_NODE);

   410

        ec_fsm_sii_exec(&fsm->fsm_sii); // execute state immediately

   411

        return;

   412

    }

   413

   414

    slave->eeprom_size = (fsm->sii_offset + 1) * 2;

   415

   417

    if (slave->eeprom_data) {

   418

        EC_INFO("Freeing old EEPROM data on slave %i...\n",

   419

                slave->ring_position);

   420

        kfree(slave->eeprom_data);

   421

    }

   422

   423

    if (!(slave->eeprom_data =

   424

          (uint8_t *) kmalloc(slave->eeprom_size, GFP_ATOMIC))) {

   425

        fsm->slave->error_flag = 1;

   426

        fsm->state = ec_fsm_slave_state_error;

   427

        EC_ERR("Failed to allocate EEPROM data on slave %i.\n",

   428

               slave->ring_position);

   429

        return;

   430

    }

   431

   432

    // Start fetching EEPROM contents

   433

   434

    fsm->state = ec_fsm_slave_scan_state_eeprom_data;

   435

    fsm->sii_offset = 0x0000;

   436

    ec_fsm_sii_read(&fsm->fsm_sii, slave, fsm->sii_offset, EC_FSM_SII_NODE);

   437

    ec_fsm_sii_exec(&fsm->fsm_sii); // execute state immediately

   438

}

   439

   440

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

   441

   442

/**

   443

   Slave scan state: EEPROM DATA.

   444

*/

   445

   446

void ec_fsm_slave_scan_state_eeprom_data(ec_fsm_slave_t *fsm /**< slave state machine */)

   447

{

   448

    ec_slave_t *slave = fsm->slave;

   449

    uint16_t *cat_word, cat_type, cat_size;

   450

   451

    if (ec_fsm_sii_exec(&fsm->fsm_sii)) return;

   452

   453

    if (!ec_fsm_sii_success(&fsm->fsm_sii)) {

   454

        fsm->slave->error_flag = 1;

   455

        fsm->state = ec_fsm_slave_state_error;

   456

        EC_ERR("Failed to fetch EEPROM contents of slave %i.\n",

   457

               slave->ring_position);

   458

        return;

   459

    }

   460

   461

    // 2 words fetched

   462

   463

    if (fsm->sii_offset + 2 <= slave->eeprom_size / 2) { // 2 words fit

   464

        memcpy(slave->eeprom_data + fsm->sii_offset * 2,

   465

               fsm->fsm_sii.value, 4);

   466

    }

   467

    else { // copy the last word

   468

        memcpy(slave->eeprom_data + fsm->sii_offset * 2,

   469

               fsm->fsm_sii.value, 2);

   470

    }

   471

   472

    if (fsm->sii_offset + 2 < slave->eeprom_size / 2) {

   473

        // fetch the next 2 words

   474

        fsm->sii_offset += 2;

   475

        ec_fsm_sii_read(&fsm->fsm_sii, slave, fsm->sii_offset,

   476

                        EC_FSM_SII_NODE);

   477

        ec_fsm_sii_exec(&fsm->fsm_sii); // execute state immediately

   478

        return;

   479

    }

   480

   481

    // Evaluate EEPROM contents

   482

   483

    slave->sii_alias =

   484

        EC_READ_U16(slave->eeprom_data + 2 * 0x0004);

   485

    slave->sii_vendor_id =

   486

        EC_READ_U32(slave->eeprom_data + 2 * 0x0008);

   487

    slave->sii_product_code =

   488

        EC_READ_U32(slave->eeprom_data + 2 * 0x000A);

   489

    slave->sii_revision_number =

   490

        EC_READ_U32(slave->eeprom_data + 2 * 0x000C);

   491

    slave->sii_serial_number =