1 /******************************************************************************

     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.

    31  *

    32  *****************************************************************************/

    33 

    34 /**

    35    \file

    36    Dummy EtherCAT master driver module.

    37 */

    38 

    39 /*****************************************************************************/

    40 

    41 #include <linux/module.h>

    42 //#include <linux/kernel.h>

    43 //#include <linux/init.h>

    44 

    45 #include "../master/globals.h"

    46 #include "../include/ecrt.h"

    47 

    48 /*****************************************************************************/

    49 

    50 int __init ec_init_module(void);

    51 void __exit ec_cleanup_module(void);

    52 

    53 char *ec_master_version_str = EC_MASTER_VERSION;

    54 

    55 /*****************************************************************************/

    56 

    57 /** \cond */

    58 

    59 MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");

    60 MODULE_DESCRIPTION("DUMMY EtherCAT master driver module");

    61 MODULE_LICENSE("GPL");

    62 MODULE_VERSION(EC_MASTER_VERSION);

    63 

    64 /** \endcond */

    65 

    66 /*****************************************************************************/

    67 

    68 #define DUMMY_SIZE (PAGE_SIZE * 8)

    69 

    70 uint8_t dummy_data[DUMMY_SIZE];

    71 off_t dummy_off = 0;

    72 

    73 uint8_t *get_dummy_data(void)

    74 {

    75     off_t cur = dummy_off;

    76 

    77     dummy_off += 64;

    78     dummy_off %= DUMMY_SIZE;

    79 

    80     return dummy_data + cur;

    81 }

    82 

    83 /*****************************************************************************/

    84 

    85 /**

    86  * Module initialization.

    87  * Initializes \a ec_master_count masters.

    88  * \return 0 on success, else < 0

    89  */

    90 

    91 int __init ec_init_module(void)

    92 {

    93     EC_INFO("Master DUMMY driver %s\n", EC_MASTER_VERSION);

    94 

    95     memset(dummy_data, 0x00, DUMMY_SIZE);

    96 

    97     return 0;

    98 }

    99 

   100 /*****************************************************************************/

   101 

   102 /**

   103    Module cleanup.

   104    Clears all master instances.

   105 */

   106 

   107 void __exit ec_cleanup_module(void)

   108 {

   109     EC_INFO("Master DUMMY module cleaned up.\n");

   110 }

   111 

   112 /******************************************************************************

   113  *  Realtime interface

   114  *****************************************************************************/

   115 

   116 unsigned int ecrt_version_magic(void)

   117 {

   118     return ECRT_VERSION_MAGIC;

   119 }

   120 

   121 /*****************************************************************************/

   122 

   123 ec_master_t *ecrt_request_master(unsigned int master_index

   124                                  /**< master index */

   125                                  )

   126 {

   127     EC_INFO("Requesting DUMMY master %u...\n", master_index);

   128     return (void *) master_index + 1;

   129 }

   130 

   131 /*****************************************************************************/

   132 

   133 /**

   134    Releases a reserved EtherCAT master.

   135    \ingroup RealtimeInterface

   136 */

   137 

   138 void ecrt_release_master(ec_master_t *master /**< EtherCAT master */)

   139 {

   140     EC_INFO("Released DUMMY master %u.\n", (unsigned int) master - 1);

   141 }

   142 

   143 /*****************************************************************************/

   144 

   145 /** \cond */

   146 

   147 module_init(ec_init_module);

   148 module_exit(ec_cleanup_module);

   149 

   150 EXPORT_SYMBOL(ecrt_request_master);

   151 EXPORT_SYMBOL(ecrt_release_master);

   152 EXPORT_SYMBOL(ecrt_version_magic);

   153 

   154 /** \endcond */

   155 

   156 /*****************************************************************************/