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

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 *

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 *  $Id$

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 *

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 *  ec_rtdm.c	Copyright (C) 2009-2010  Moehwald GmbH B.Benner

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 *                            2011       IgH Andreas Stewering-Bone

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 *								  

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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

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 *  redistribute it and/or modify it under the terms of the GNU Lesser General

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 *  Public License as published by the Free Software Foundation; version 2.1

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 *  of the License.

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 *

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 *  The IgH EtherCAT master userspace library is distributed in the hope that

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 *  it will be useful, but WITHOUT ANY WARRANTY; without even the implied

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 *  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU Lesser General Public License for more details.

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 *

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

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 *  along with the IgH EtherCAT master userspace library. If not, see

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 *  <http://www.gnu.org/licenses/>.

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

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#include <linux/module.h>

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#include <linux/mman.h>

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#include <native/task.h>

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#include <native/sem.h>

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#include <native/mutex.h>

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#include <native/timer.h>

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

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#include "../include/ec_rtdm.h"

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#define EC_RTDM_MAX_MASTERS 5 /**< Maximum number of masters. */

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#define EC_RTDM_GINFO(fmt, args...) \

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    rtdm_printk(KERN_INFO "EtherCATrtdm: " fmt,  ##args)

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#define EC_RTDM_GERR(fmt, args...) \

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    rtdm_printk(KERN_ERR "EtherCATrtdm ERROR: " fmt, ##args)

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#define EC_RTDM_GWARN(fmt, args...) \

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    rtdm_printk(KERN_WARNING "EtherCATrtdm WARNING: " fmt, ##args)

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#define EC_RTDM_INFO(devno, fmt, args...) \

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    rtdm_printk(KERN_INFO "EtherCATrtdm %u: " fmt, devno, ##args)

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#define EC_RTDM_ERR(devno, fmt, args...) \

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    rtdm_printk(KERN_ERR "EtherCATrtdm %u ERROR: " fmt, devno, ##args)

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#define EC_RTDM_WARN(devno, fmt, args...) \

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    rtdm_printk(KERN_WARNING "EtherCATrtdm %u WARNING: " fmt, devno, ##args)

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typedef struct _EC_RTDM_DRV_STRUCT {

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    unsigned int	    isattached;

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    ec_master_t *	    master;

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    unsigned int	    sendcnt;

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    unsigned int	    reccnt;

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    unsigned int	    sendcntlv;

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    unsigned int	    reccntlv;

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    char                    mutexname[64];

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    unsigned int            masterno;

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} EC_RTDM_DRV_STRUCT;

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static EC_RTDM_DRV_STRUCT ec_rtdm_masterintf[EC_RTDM_MAX_MASTERS];

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   116

   117

/* import from ethercat */

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ec_master_t *ecrt_attach_master(unsigned int master_index /**< Index of the master to request. */

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        );

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// driver context struct: used for storing various information

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typedef struct _EC_RTDM_DRV_CONTEXT {

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    int                       dev_id;

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    EC_RTDM_DRV_STRUCT*  pdrvstruc;

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} EC_RTDM_DRV_CONTEXT;

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   127

   128

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

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/*            Utilities                                   */

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

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static int _atoi(const char* text)

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{

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  char  b;

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  int wd=-1;

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  int nfak=1;

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  wd=0;

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  while ((*text==' ') || (*text=='\t')) text++;

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  if (*text=='-') 

   143

    {

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      nfak=-1;

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	  text++;

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    }

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  if (*text=='+') 

   148

    {

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      text++;

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    }

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  while (*text!=0)

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    {

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 	  b = *text;

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	  if ( (b>='0') && (b<='9') )

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		{

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		   b=b-'0';

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		   wd=wd*10+b;

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		}

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	  text++;

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	}

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  return (nfak*wd);

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}

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

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/*            DRIVER sendcallback                         */

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

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void send_callback(void *cb_data)

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{

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    EC_RTDM_DRV_STRUCT * pdrvstruc;

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    pdrvstruc = (EC_RTDM_DRV_STRUCT*)cb_data;

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    if (pdrvstruc->master)

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        {

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            ecrt_master_send_ext(pdrvstruc->master);

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      }

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}

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

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void receive_callback(void *cb_data)

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{

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    EC_RTDM_DRV_STRUCT * pdrvstruc;

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    pdrvstruc = (EC_RTDM_DRV_STRUCT*)cb_data;

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    if (pdrvstruc->master)

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      {

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          ecrt_master_receive(pdrvstruc->master);

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    }

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}

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void detach_master(EC_RTDM_DRV_STRUCT * pdrvstruc)

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{

   202

   203

  if (pdrvstruc->isattached)

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      {

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          EC_RTDM_INFO(pdrvstruc->masterno,"reseting callbacks!\n");

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          ecrt_master_callbacks(pdrvstruc->master,NULL,NULL,NULL);

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          EC_RTDM_INFO(pdrvstruc->masterno,"deleting mutex!\n");

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          pdrvstruc->master = NULL;

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          pdrvstruc->isattached=0;

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          EC_RTDM_INFO(pdrvstruc->masterno,"master detach done!\n");

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      }

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}

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

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/*            DRIVER OPEN                                 */

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

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int ec_rtdm_open_rt(struct rtdm_dev_context    *context,

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                 rtdm_user_info_t           *user_info,

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                 int                        oflags)

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{

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    EC_RTDM_DRV_CONTEXT* my_context;

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    EC_RTDM_DRV_STRUCT * pdrvstruc;

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    const char * p;

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    int dev_no;

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    unsigned int namelen;

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    //int ret;

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    int dev_id;

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    // get the context for our driver - used to store driver info

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    my_context = (EC_RTDM_DRV_CONTEXT*)context->dev_private;

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    dev_no = -1;

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    namelen   = strlen(context->device->driver_name);

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    p = &context->device->driver_name[namelen-1];

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    if (p!=&context->device->driver_name[0])

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      {

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	  while ((*p>='0') && (*p<='9')) 

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	    {

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	       p--;

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	       if (p==&context->device->driver_name[0]) break;

   246

   	    }

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	  dev_no=_atoi(p);

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	  if  ((dev_no!=-1) && (dev_no<EC_RTDM_MAX_MASTERS))

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	    { 

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		dev_id    = context->device->device_id;

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    		pdrvstruc = (EC_RTDM_DRV_STRUCT*)&ec_rtdm_masterintf[dev_no];

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    		my_context->dev_id         = dev_id;

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    		my_context->pdrvstruc      = pdrvstruc;

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    		// enable interrupt in RTDM

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    		return 0;	

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	    }	

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      }

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   EC_RTDM_GERR("open - Cannot detect master device no\n");

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   return -EFAULT;

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}

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

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/*            DRIVER CLOSE                                */

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

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int ec_rtdm_close_rt(struct rtdm_dev_context   *context,

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                  rtdm_user_info_t          *user_info)

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{

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    EC_RTDM_DRV_CONTEXT* my_context;

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    EC_RTDM_DRV_STRUCT * pdrvstruc;

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   273

    // get the context

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    my_context = (EC_RTDM_DRV_CONTEXT*)context->dev_private;

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    pdrvstruc =  my_context->pdrvstruc;

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    EC_RTDM_INFO(pdrvstruc->masterno,"close called!\n");

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    detach_master(pdrvstruc);

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    return 0;

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}

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

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/*            DRIVER IOCTL                                */

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

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int ec_rtdm_ioctl_rt(struct rtdm_dev_context   *context,

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                  rtdm_user_info_t          *user_info,

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                  int                       request,

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                  void                      *arg)

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{

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    EC_RTDM_DRV_CONTEXT* my_context;

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    EC_RTDM_DRV_STRUCT * pdrvstruc;

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    int ret;

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    unsigned int l_ioctlvalue[]={0,0,0,0,0,0,0,0};

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    ec_domain_state_t ds;

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    ec_master_state_t ms;

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    uint64_t app_time;

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    ret = 0;

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    // get the context

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    my_context = (EC_RTDM_DRV_CONTEXT*)context->dev_private;

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    pdrvstruc =  my_context->pdrvstruc;

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    switch (request) {

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    case EC_RTDM_MASTERSTATE:

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    {

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		if (!pdrvstruc->isattached)

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            {

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                return -EFAULT;

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            }

   313

		if (pdrvstruc->master)

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            {

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   317

                ecrt_master_state(pdrvstruc->master, &ms);

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   320

   321

            }

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        if  (rtdm_rw_user_ok(user_info, arg, sizeof(ms)))

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            {

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                // copy data to user

   325

                if (rtdm_copy_to_user(user_info, arg, &ms,sizeof(ms)))

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                    {

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                        return -EFAULT;

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                    }

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            }

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   331

    }

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    break;

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    case EC_RTDM_DOMAINSTATE:

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    {

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		if (!pdrvstruc->isattached)

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            {

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                return -EFAULT;

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            }

   339

	   	if (pdrvstruc->domain)

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            {

   342

   343

                ecrt_domain_state(pdrvstruc->domain, &ds);

   344

   346

            }

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        if  (rtdm_rw_user_ok(user_info, arg, sizeof(ds)))

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            {

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                // copy data to user

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                if (rtdm_copy_to_user(user_info, arg, &ds,sizeof(ds)))

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                    {

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                        return -EFAULT;

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                    }

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            }

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    }

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    break;

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    case EC_RTDM_MASTER_RECEIVE:

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    {	       

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        if (pdrvstruc->isattached)

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            {

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                if (pdrvstruc->master)

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                    {

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                        ecrt_master_receive(pdrvstruc->master);

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                        pdrvstruc->reccnt++;

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                    }

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            }

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    }

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    break;

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    case EC_RTDM_DOMAIN_PROCESS:

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    {	       

   373

        if (pdrvstruc->isattached)

   374

            {

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                ecrt_domain_process(pdrvstruc->domain);

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            }

   379

    }

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    break;

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    case EC_RTDM_MASTER_SEND:

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    {

   383

   384

        if (pdrvstruc->isattached)

   385

            {

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                if (pdrvstruc->master)

   387

                    {

   389

                        ecrt_master_send(pdrvstruc->master);

   390

                        pdrvstruc->sendcnt++;

   392

                    }

   393

            }

   394

    }

   395

    break;

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    case EC_RTDM_DOMAIN_QUEQUE:

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    {	       

   398

        if (pdrvstruc->isattached)

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            {

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                ecrt_domain_queue(pdrvstruc->domain);

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            }

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    }

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    break;

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   407

    case EC_RTDM_MASTER_APP_TIME:

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    {

   409

		if (!pdrvstruc->isattached)

   410

            {

   411

                rtdm_printk("ERROR : No Master attached\n");

   412

                return -EFAULT;

   413

            }

   414

        if (rtdm_safe_copy_from_user(user_info, &app_time, arg, sizeof(app_time)))

   415

            {

   416

                rtdm_printk("ERROR : can't copy data to driver\n");

   417

                return -EFAULT;

   418

            }

   419

   420

        if (pdrvstruc->master)

   421

            {

   423

   424

                ecrt_master_application_time(pdrvstruc->master, app_time);

   426

   427

            }

   428

    }

   429

    break;

   430

    case EC_RTDM_SYNC_REF_CLOCK:

   431

    {

   432

		if (!pdrvstruc->isattached)

   433

            {

   434

                return -EFAULT;

   435

            }

   436

        if (pdrvstruc->master)

   437

            {

   439

   440

                ecrt_master_sync_reference_clock(pdrvstruc->master);

   441

   443

   444

            }

   445

    }

   446

    break;

   447

    case EC_RTDM_SYNC_SLAVE_CLOCK:

   448

    {

   449

		if (!pdrvstruc->isattached)

   450

            {

   451

                return -EFAULT;

   452

            }

   453

        if (pdrvstruc->master)

   454

            {

   456

   457

                ecrt_master_sync_slave_clocks(pdrvstruc->master);

   458

   460

   461

            }

   462

    }

   463

    break;

   464

    case EC_RTDM_MASTER_SYNC_MONITOR_QUEQUE:

   465

    {

   466

		if (!pdrvstruc->isattached)

   467

            {

   468

                return -EFAULT;

   469

            }

   470

        if (pdrvstruc->master)

   471

            {

   473

                ecrt_master_sync_monitor_queue(pdrvstruc->master);

   475

            }

   476

    }

   477

    break;

   478

    case EC_RTDM_MASTER_SYNC_MONITOR_PROCESS:

   479

    {

   480

        uint32_t ret;

   481

		if (!pdrvstruc->isattached)

   482

            {

   483

                return -EFAULT;

   484

            }

   485

        if (pdrvstruc->master)

   486

            {

   488

                ret = ecrt_master_sync_monitor_process(pdrvstruc->master);

   490

                if (rtdm_safe_copy_to_user(user_info, arg, &ret, sizeof(ret)))

   491

                    {

   492

                        EC_RTDM_ERR(pdrvstruc->masterno,"copy to user param failed!\n");

   493

                        ret=-EFAULT;

   494

                    }

   495

            }

   496

    }

   497

    break;

   498

    case EC_RTDM_MSTRATTACH:

   499

    {

   500

        unsigned int mstridx;

   501

   502

        mstridx = 0;

   503

        ret = 0;

   504

   505

        EC_RTDM_INFO(pdrvstruc->masterno,"Master attach start!\n");

   506

        if (user_info) 

   507

            {

   508

                if (rtdm_read_user_ok(user_info, arg, sizeof(unsigned int)))

   509

                    {

   510

                        if (rtdm_copy_from_user(user_info, &l_ioctlvalue[0], arg,sizeof(unsigned int))==0)

   511

                            {

   512

                                pdrvstruc->domain = (ec_domain_t*)l_ioctlvalue[0];

   513

                            }