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

     2

 *

     3

 *  $Id$

     4

 *

     5

 *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH

     6

 *

     7

 *  This file is part of the IgH EtherCAT Master.

     8

 *

     9

 *  The IgH EtherCAT Master is free software; you can redistribute it

    10

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

    11

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

    12

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

    13

 *

    14

 *  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

    16

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    17

 *  GNU General Public License for more details.

    18

 *

    19

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

    20

 *  along with the IgH EtherCAT Master; if not, write to the Free Software

    21

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    22

 *

    23

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

    24

 *  charge under condition of compatibility of product made by

    25

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

    26

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

    27

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

    28

 *  EtherCAT specification (which are released themselves as an open

    29

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

    30

 *  Technology, IP and trade marks.

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 *

    32

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

    33

    34

/**

    35

   \file

    36

   EtherCAT slave methods.

    37

*/

    38

    39

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

    40

    41

#include <linux/module.h>

    42

#include <linux/delay.h>

    43

    44

#include "globals.h"

    45

#include "slave.h"

    46

#include "datagram.h"

    47

#include "master.h"

    48

    49

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

    50

    51

extern const ec_code_msg_t al_status_messages[];

    52

    53

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

    54

    55

void ec_slave_clear(struct kobject *);

    56

void ec_slave_sdos_clear(struct kobject *);

    57

ssize_t ec_show_slave_attribute(struct kobject *, struct attribute *, char *);

    58

ssize_t ec_store_slave_attribute(struct kobject *, struct attribute *,

    59

                                 const char *, size_t);

    60

char *ec_slave_sii_string(ec_slave_t *, unsigned int);

    61

    62

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

    63

    64

/** \cond */

    65

    66

EC_SYSFS_READ_ATTR(info);

    67

EC_SYSFS_READ_WRITE_ATTR(state);

    68

EC_SYSFS_READ_WRITE_ATTR(eeprom);

    69

EC_SYSFS_READ_WRITE_ATTR(alias);

    70

    71

static struct attribute *def_attrs[] = {

    72

    &attr_info,

    73

    &attr_state,

    74

    &attr_eeprom,

    75

    &attr_alias,

    76

    NULL,

    77

};

    78

    79

static struct sysfs_ops sysfs_ops = {

    80

    .show = ec_show_slave_attribute,

    81

    .store = ec_store_slave_attribute

    82

};

    83

    84

static struct kobj_type ktype_ec_slave = {

    85

    .release = ec_slave_clear,

    86

    .sysfs_ops = &sysfs_ops,

    87

    .default_attrs = def_attrs

    88

};

    89

    90

static struct kobj_type ktype_ec_slave_sdos = {

    91

    .release = ec_slave_sdos_clear

    92

};

    93

    94

/** \endcond */

    95

    96

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

    97

    98

/**

    99

   Slave constructor.

   100

   \return 0 in case of success, else < 0

   101

*/

   102

   103

int ec_slave_init(ec_slave_t *slave, /**< EtherCAT slave */

   104

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

   105

                  uint16_t ring_position, /**< ring position */

   106

                  uint16_t station_address /**< station address to configure */

   107

                  )

   108

{

   109

    unsigned int i;

   110

   111

    slave->ring_position = ring_position;

   112

    slave->station_address = station_address;

   113

   114

    slave->master = master;

   115

   116

    slave->requested_state = EC_SLAVE_STATE_PREOP;

   117

    slave->current_state = EC_SLAVE_STATE_UNKNOWN;

   118

    slave->self_configured = 0;

   119

    slave->error_flag = 0;

   120

    slave->online_state = EC_SLAVE_ONLINE;

   121

    slave->fmmu_count = 0;

   122

    slave->pdos_registered = 0;

   123

   124

    slave->base_type = 0;

   125

    slave->base_revision = 0;

   126

    slave->base_build = 0;

   127

    slave->base_fmmu_count = 0;

   128

   129

    slave->eeprom_data = NULL;

   130

    slave->eeprom_size = 0;

   131

   132

    slave->sii_alias = 0;

   133

    slave->sii_vendor_id = 0;

   134

    slave->sii_product_code = 0;

   135

    slave->sii_revision_number = 0;

   136

    slave->sii_serial_number = 0;

   137

    slave->sii_rx_mailbox_offset = 0;

   138

    slave->sii_rx_mailbox_size = 0;

   139

    slave->sii_tx_mailbox_offset = 0;

   140

    slave->sii_tx_mailbox_size = 0;

   141

    slave->sii_mailbox_protocols = 0;

   142

    slave->sii_group = NULL;

   143

    slave->sii_image = NULL;

   144

    slave->sii_order = NULL;

   145

    slave->sii_name = NULL;

   146

    slave->sii_current_on_ebus = 0;

   147

   148

    slave->sii_strings = NULL;

   149

    slave->sii_string_count = 0;

   150

    slave->sii_syncs = NULL;

   151

    slave->sii_sync_count = 0;

   152

    INIT_LIST_HEAD(&slave->sii_pdos);

   153

    INIT_LIST_HEAD(&slave->sdo_dictionary);

   154

    INIT_LIST_HEAD(&slave->sdo_confs);

   155

   156

    slave->sdo_dictionary_fetched = 0;

   157

    slave->jiffies_preop = 0;

   158

   159

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

   160

        slave->dl_link[i] = 0;

   161

        slave->dl_loop[i] = 0;

   162

        slave->dl_signal[i] = 0;

   163

        slave->sii_physical_layer[i] = 0xFF;

   164

    }

   165

   166

    // init kobject and add it to the hierarchy

   167

    memset(&slave->kobj, 0x00, sizeof(struct kobject));

   168

    kobject_init(&slave->kobj);

   169

    slave->kobj.ktype = &ktype_ec_slave;

   170

    slave->kobj.parent = &master->kobj;

   171

    if (kobject_set_name(&slave->kobj, "slave%03i", slave->ring_position)) {

   172

        EC_ERR("Failed to set kobject name.\n");

   173

        goto out_slave_put;

   174

    }

   175

    if (kobject_add(&slave->kobj)) {

   176

        EC_ERR("Failed to add slave's kobject.\n");

   177

        goto out_slave_put;

   178

    }

   179

   180

    // init SDO kobject and add it to the hierarchy

   181

    memset(&slave->sdo_kobj, 0x00, sizeof(struct kobject));

   182

    kobject_init(&slave->sdo_kobj);

   183

    slave->sdo_kobj.ktype = &ktype_ec_slave_sdos;

   184

    slave->sdo_kobj.parent = &slave->kobj;

   185

    if (kobject_set_name(&slave->sdo_kobj, "sdos")) {

   186

        EC_ERR("Failed to set kobject name.\n");

   187

        goto out_sdo_put;

   188

    }

   189

    if (kobject_add(&slave->sdo_kobj)) {

   190

        EC_ERR("Failed to add SDOs kobject.\n");

   191

        goto out_sdo_put;

   192

    }

   193

   194

    return 0;

   195

   196

 out_sdo_put:

   197

    kobject_put(&slave->sdo_kobj);

   198

    kobject_del(&slave->kobj);

   199

 out_slave_put:

   200

    kobject_put(&slave->kobj);

   201

    return -1;

   202

}

   203

   204

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

   205

   206

/**

   207

   Slave destructor.

   208

   Clears and frees a slave object.

   209

*/

   210

   211

void ec_slave_destroy(ec_slave_t *slave /**< EtherCAT slave */)

   212

{

   213

    ec_sdo_t *sdo, *next_sdo;

   214

   215

    // free all SDOs

   216

    list_for_each_entry_safe(sdo, next_sdo, &slave->sdo_dictionary, list) {

   217

        list_del(&sdo->list);

   218

        ec_sdo_destroy(sdo);

   219

    }

   220

   221

    // free SDO kobject

   222

    kobject_del(&slave->sdo_kobj);

   223

    kobject_put(&slave->sdo_kobj);

   224

   225

    // destroy self

   226

    kobject_del(&slave->kobj);

   227

    kobject_put(&slave->kobj);

   228

}

   229

   230

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

   231

   232

/**

   233

   Clear and free slave.

   234

   This method is called by the kobject,

   235

   once there are no more references to it.

   236

*/

   237

   238

void ec_slave_clear(struct kobject *kobj /**< kobject of the slave */)

   239

{

   240

    ec_slave_t *slave;

   241

    ec_pdo_t *pdo, *next_pdo;

   242

    ec_sdo_data_t *sdodata, *next_sdodata;

   243

    unsigned int i;

   244

   245

    slave = container_of(kobj, ec_slave_t, kobj);

   246

   247

    // free all strings

   248

    if (slave->sii_strings) {

   249

        for (i = 0; i < slave->sii_string_count; i++)

   250

            kfree(slave->sii_strings[i]);

   251

        kfree(slave->sii_strings);

   252

    }

   253

   254

    // free all sync managers

   255

    if (slave->sii_syncs) {

   256

        for (i = 0; i < slave->sii_sync_count; i++) {

   257

            ec_sync_clear(&slave->sii_syncs[i]);

   258

        }

   259

        kfree(slave->sii_syncs);

   260

    }

   261

   262

    // free all SII PDOs

   263

    list_for_each_entry_safe(pdo, next_pdo, &slave->sii_pdos, list) {

   264

        list_del(&pdo->list);

   265

        ec_pdo_clear(pdo);

   266

        kfree(pdo);

   267

    }

   268

   269

    // free all SDO configurations

   270

    list_for_each_entry_safe(sdodata, next_sdodata, &slave->sdo_confs, list) {

   271

        list_del(&sdodata->list);

   272

        kfree(sdodata->data);

   273

        kfree(sdodata);

   274

    }

   275

   276

    if (slave->eeprom_data) kfree(slave->eeprom_data);

   277

   278

    kfree(slave);

   279

}

   280

   281

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

   282

   283

/**

   284

*/

   285

   286

void ec_slave_sdos_clear(struct kobject *kobj /**< kobject for SDOs */)

   287

{

   288

}

   289

   290

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

   291

   292

/**

   293

   Reset slave from operation mode.

   294

*/

   295

   296

void ec_slave_reset(ec_slave_t *slave /**< EtherCAT slave */)

   297

{

   298

    ec_sdo_data_t *sdodata, *next_sdodata;

   299

    unsigned int i;

   300

   301

    slave->fmmu_count = 0;

   302

    slave->pdos_registered = 0;

   303

   304

    // free all SDO configurations

   305

    list_for_each_entry_safe(sdodata, next_sdodata, &slave->sdo_confs, list) {

   306

        list_del(&sdodata->list);

   307

        kfree(sdodata->data);

   308

        kfree(sdodata);

   309

    }

   310

   311

    // remove estimated sync manager sizes

   312

    for (i = 0; i < slave->sii_sync_count; i++) {

   313

        slave->sii_syncs[i].est_length = 0;

   314

    }

   315

}

   316

   317

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

   318

   319

/**

   320

 * Sets the application state of a slave.

   321

 */

   322

   323

void ec_slave_set_state(ec_slave_t *slave, /**< EtherCAT slave */

   324

        ec_slave_state_t new_state /**< new application state */

   325

        )

   326

{

   327

    if (new_state != slave->current_state) {

   328

        if (slave->master->debug_level) {

   329

            char old_state[EC_STATE_STRING_SIZE],

   330

                cur_state[EC_STATE_STRING_SIZE];

   331

            ec_state_string(slave->current_state, old_state);

   332

            ec_state_string(new_state, cur_state);

   333

            EC_DBG("Slave %i: %s -> %s.\n",

   334

                   slave->ring_position, old_state, cur_state);

   335

        }

   336

        slave->current_state = new_state;

   337

    }

   338

}

   339

   340

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

   341

   342

/**

   343

 * Sets the online state of a slave.

   344

 */

   345

   346

void ec_slave_set_online_state(ec_slave_t *slave, /**< EtherCAT slave */

   347

        ec_slave_online_state_t new_state /**< new online state */

   348

        )

   349

{

   350

    if (new_state == EC_SLAVE_OFFLINE &&

   351

            slave->online_state == EC_SLAVE_ONLINE) {

   352

        if (slave->pdos_registered)

   353

            slave->master->pdo_slaves_offline++;

   354

        if (slave->master->debug_level)

   355

            EC_DBG("Slave %i: offline.\n", slave->ring_position);

   356

    }

   357

    else if (new_state == EC_SLAVE_ONLINE &&

   358

            slave->online_state == EC_SLAVE_OFFLINE) {

   359

        slave->error_flag = 0; // clear error flag

   360

        if (slave->pdos_registered)

   361

            slave->master->pdo_slaves_offline--;

   362

        if (slave->master->debug_level) {

   363

            char cur_state[EC_STATE_STRING_SIZE];

   364

            ec_state_string(slave->current_state, cur_state);

   365

            EC_DBG("Slave %i: online (%s).\n",

   366

                   slave->ring_position, cur_state);

   367

        }

   368

    }

   369

   370

    slave->online_state = new_state;

   371

}

   372

   373

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

   374

   375

/**

   376

 */

   377

   378

void ec_slave_request_state(ec_slave_t *slave, /**< EtherCAT slave */

   379

                            ec_slave_state_t state /**< new state */

   380

                            )

   381

{

   382

    slave->requested_state = state;

   383

    slave->error_flag = 0;

   384

}

   385

   386

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

   387

   388

/**

   389

   Fetches data from a STRING category.

   390

   \return 0 in case of success, else < 0

   391

*/

   392

   393

int ec_slave_fetch_sii_strings(

   394

        ec_slave_t *slave, /**< EtherCAT slave */

   395

        const uint8_t *data /**< category data */

   396

        )

   397

{

   398

    int i;

   399

    size_t size;

   400

    off_t offset;

   401

   402

    slave->sii_string_count = data[0];

   403

   404

    if (!slave->sii_string_count)

   405

        return 0;

   406

   407

    if (!(slave->sii_strings =

   408

                kmalloc(sizeof(char *) * slave->sii_string_count,

   409

                    GFP_KERNEL))) {

   410

        EC_ERR("Failed to allocate string array memory.\n");

   411

        goto out_zero;

   412

    }

   413

   414

    offset = 1;

   415

    for (i = 0; i < slave->sii_string_count; i++) {

   416

        size = data[offset];

   417

        // allocate memory for string structure and data at a single blow

   418

        if (!(slave->sii_strings[i] =

   419

                    kmalloc(sizeof(char) * size + 1, GFP_KERNEL))) {

   420

            EC_ERR("Failed to allocate string memory.\n");

   421

            goto out_free;

   422

        }

   423

        memcpy(slave->sii_strings[i], data + offset + 1, size);

   424

        slave->sii_strings[i][size] = 0x00; // append binary zero

   425

        offset += 1 + size;

   426

    }

   427

   428

    return 0;

   429

   430

out_free:

   431

    for (i--; i >= 0; i--) kfree(slave->sii_strings[i]);

   432

    kfree(slave->sii_strings);

   433

    slave->sii_strings = NULL;

   434

out_zero:

   435

    slave->sii_string_count = 0;

   436

    return -1;

   437

}

   438

   439

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

   440

   441

/**

   442

   Fetches data from a GENERAL category.

   443

   \return 0 in case of success, else < 0

   444

*/

   445

   446

void ec_slave_fetch_sii_general(

   447

        ec_slave_t *slave, /**< EtherCAT slave */

   448

        const uint8_t *data /**< category data */

   449

        )

   450

{

   451

    unsigned int i;

   452

   453

    slave->sii_group = ec_slave_sii_string(slave, data[0]);

   454

    slave->sii_image = ec_slave_sii_string(slave, data[1]);

   455

    slave->sii_order = ec_slave_sii_string(slave, data[2]);

   456

    slave->sii_name = ec_slave_sii_string(slave, data[3]);

   457

   458

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

   459

        slave->sii_physical_layer[i] =

   460

            (data[4] & (0x03 << (i * 2))) >> (i * 2);

   461

   462

    slave->sii_current_on_ebus = EC_READ_S16(data + 0x0C);

   463

}

   464

   465

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

   466

   467

/**

   468

   Fetches data from a SYNC MANAGER category.

   469

   \return 0 in case of success, else < 0

   470

*/

   471

   472

int ec_slave_fetch_sii_syncs(

   473

        ec_slave_t *slave, /**< EtherCAT slave */

   474

        const uint8_t *data, /**< category data */

   475

        size_t word_count /**< number of words */

   476

        )

   477

{

   478

    unsigned int i;

   479

    ec_sync_t *sync;

   480

   481

    // sync manager struct is 4 words long

   482

    slave->sii_sync_count = word_count / 4;

   483

   484

    if (!(slave->sii_syncs =

   485

                kmalloc(sizeof(ec_sync_t) * slave->sii_sync_count,

   486

                    GFP_KERNEL))) {

   487