etisserant@47: /*
etisserant@47: This file is part of CanFestival, a library implementing CanOpen Stack.
etisserant@47: 
etisserant@47: Copyright (C): Edouard TISSERANT and Francis DUPIN
etisserant@47: 
etisserant@47: See COPYING file for copyrights details.
etisserant@47: 
etisserant@47: This library is free software; you can redistribute it and/or
etisserant@47: modify it under the terms of the GNU Lesser General Public
etisserant@47: License as published by the Free Software Foundation; either
etisserant@47: version 2.1 of the License, or (at your option) any later version.
etisserant@47: 
etisserant@47: This library is distributed in the hope that it will be useful,
etisserant@47: but WITHOUT ANY WARRANTY; without even the implied warranty of
etisserant@47: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
etisserant@47: Lesser General Public License for more details.
etisserant@47: 
etisserant@47: You should have received a copy of the GNU Lesser General Public
etisserant@47: License along with this library; if not, write to the Free Software
etisserant@47: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
etisserant@47: */
etisserant@47: 
etisserant@47: #include <stdio.h>
etisserant@47: #include <string.h>
etisserant@47: #include <stdlib.h>
etisserant@196: #include <stddef.h>		/* for NULL */
etisserant@192: #include <errno.h>
etisserant@47: 
etisserant@47: #include "config.h"
etisserant@47: 
etisserant@47: #ifdef RTCAN_SOCKET
Edouard@799: #include "rtdm/can.h"
etisserant@47: #define CAN_IFNAME     "rtcan%s"
etisserant@47: #else
edouard@631: #include <unistd.h>
etisserant@187: #include <sys/socket.h>
etisserant@187: #include <sys/ioctl.h>
etisserant@187: #include "linux/can.h"
etisserant@187: #include "linux/can/raw.h"
etisserant@187: #include "net/if.h"
edouard@631: #ifndef PF_CAN
etisserant@187: #define PF_CAN 29
edouard@631: #endif
edouard@631: #ifndef AF_CAN
etisserant@187: #define AF_CAN PF_CAN
edouard@631: #endif
etisserant@187: //#include "af_can.h"
etisserant@47: #define CAN_IFNAME     "can%s"
Edouard@802: #endif
Edouard@802: 
etisserant@47: #include "can_driver.h"
etisserant@47: 
etisserant@47: /*********functions which permit to communicate with the board****************/
etisserant@196: UNS8
etisserant@196: canReceive_driver (CAN_HANDLE fd0, Message * m)
etisserant@196: {
Edouard@807:   int res = 0;
etisserant@196:   struct can_frame frame;
etisserant@196: 
Edouard@807:   while (res <= 0) {
Edouard@807:     res = recv (*(int *) fd0, &frame, sizeof (frame), 0);
Edouard@807:     if (res < 0)
Edouard@807:     {
Edouard@807:         if (errno == EBADF)
Edouard@807:         {
Edouard@807:             /* this will exit recieve loop */
Edouard@807:             return 1;
Edouard@807:         }
Edouard@807:         else if (errno == EINTR) continue; /* retry immediatly */
Edouard@807:         else
Edouard@807:         {
Edouard@807:             /* print error and retry after 20ms, arbitrary */
Edouard@807:             fprintf (stderr, "Recv failed: %s\n", strerror (errno));
Edouard@807:             usleep(20000);
Edouard@807:             continue;
Edouard@807:         }
Edouard@807:     }
Edouard@807:     else if (res == 0)
Edouard@807:     {
Edouard@807:         /* this will exit recieve loop */
Edouard@807:         return 1;
Edouard@807:     }
Edouard@807:   } 
etisserant@365:   m->cob_id = frame.can_id & CAN_EFF_MASK;
etisserant@196:   m->len = frame.can_dlc;
etisserant@196:   if (frame.can_id & CAN_RTR_FLAG)
etisserant@196:     m->rtr = 1;
etisserant@196:   else
etisserant@196:     m->rtr = 0;
etisserant@196:   memcpy (m->data, frame.data, 8);
etisserant@196: 
etisserant@330: #if defined DEBUG_MSG_CONSOLE_ON
greg@454:   MSG("in : ");
etisserant@290:   print_message(m);
etisserant@290: #endif
etisserant@196:   return 0;
etisserant@196: }
etisserant@196: 
etisserant@196: 
etisserant@196: /***************************************************************************/
etisserant@196: UNS8
edouard@631: canSend_driver (CAN_HANDLE fd0, Message const * m)
etisserant@196: {
etisserant@196:   int res;
etisserant@196:   struct can_frame frame;
etisserant@196: 
etisserant@365:   frame.can_id = m->cob_id;
etisserant@196:   if (frame.can_id >= 0x800)
etisserant@196:     frame.can_id |= CAN_EFF_FLAG;
etisserant@196:   frame.can_dlc = m->len;
etisserant@196:   if (m->rtr)
etisserant@196:     frame.can_id |= CAN_RTR_FLAG;
etisserant@196:   else
etisserant@196:     memcpy (frame.data, m->data, 8);
etisserant@196: 
etisserant@330: #if defined DEBUG_MSG_CONSOLE_ON
greg@454:   MSG("out : ");
etisserant@290:   print_message(m);
etisserant@290: #endif
Edouard@804:   res = send (*(int *) fd0, &frame, sizeof (frame), 0);
Edouard@805:   if (res <= 0)
etisserant@196:     {
Edouard@804:       fprintf (stderr, "Send failed: %s\n", strerror (errno));
etisserant@196:       return 1;
etisserant@196:     }
etisserant@196: 
etisserant@196:   return 0;
etisserant@196: }
etisserant@196: 
etisserant@196: /***************************************************************************/
etisserant@196: #ifdef RTCAN_SOCKET
etisserant@196: int
etisserant@196: TranslateBaudRate (const char *optarg)
etisserant@196: {
etisserant@196:   int baudrate;
etisserant@196:   int val, len;
etisserant@196:   char *pos = NULL;
etisserant@196: 
etisserant@196:   len = strlen (optarg);
etisserant@196:   if (!len)
etisserant@196:     return 0;
etisserant@196: 
etisserant@196:   switch ((int) optarg[len - 1])
etisserant@196:     {
etisserant@196:     case 'M':
etisserant@196:       baudrate = 1000000;
etisserant@196:       break;
etisserant@196:     case 'K':
etisserant@196:       baudrate = 1000;
etisserant@196:       break;
etisserant@196:     default:
etisserant@196:       baudrate = 1;
etisserant@196:       break;
etisserant@196:     }
etisserant@196:   if ((sscanf (optarg, "%i", &val)) == 1)
etisserant@196:     baudrate *= val;
etisserant@196:   else
etisserant@196:     baudrate = 0;;
etisserant@196: 
etisserant@196:   return baudrate;
etisserant@196: }
etisserant@196: #endif
etisserant@196: 
groke6@384: UNS8 canChangeBaudRate_driver( CAN_HANDLE fd, char* baud)
groke6@384: {
groke6@384: 	printf("canChangeBaudRate not yet supported by this driver\n");
groke6@384: 	return 0;
groke6@384: }
groke6@384: 
etisserant@196: /***************************************************************************/
etisserant@196: CAN_HANDLE
etisserant@196: canOpen_driver (s_BOARD * board)
etisserant@196: {
etisserant@196:   struct ifreq ifr;
etisserant@196:   struct sockaddr_can addr;
etisserant@196:   int err;
etisserant@196:   CAN_HANDLE fd0 = malloc (sizeof (int));
etisserant@196: #ifdef RTCAN_SOCKET
blaz@796:   nanosecs_rel_t tx_timeout;
etisserant@196:   can_baudrate_t *baudrate;
etisserant@196:   can_mode_t *mode;
etisserant@196: #endif
etisserant@196: 
edouard@631:   if(!fd0)
edouard@631:     {
edouard@631:       return NULL;
edouard@631:     }
edouard@631: 
Edouard@804:   *(int *) fd0 = socket (PF_CAN, SOCK_RAW, CAN_RAW);
etisserant@196:   if (*(int *) fd0 < 0)
etisserant@196:     {
etisserant@196:       fprintf (stderr, "Socket creation failed: %s\n",
Edouard@804: 	       strerror (errno));
etisserant@196:       goto error_ret;
etisserant@196:     }
etisserant@196: 
etisserant@196:   if (*board->busname >= '0' && *board->busname <= '9')
etisserant@196:     snprintf (ifr.ifr_name, IFNAMSIZ, CAN_IFNAME, board->busname);
etisserant@196:   else
etisserant@196:     strncpy (ifr.ifr_name, board->busname, IFNAMSIZ);
Edouard@804:   err = ioctl (*(int *) fd0, SIOCGIFINDEX, &ifr);
etisserant@196:   if (err)
etisserant@196:     {
etisserant@196:       fprintf (stderr, "Getting IF index for %s failed: %s\n",
Edouard@804: 	       ifr.ifr_name, strerror (errno));
etisserant@196:       goto error_close;
etisserant@196:     }
etisserant@290:   
etisserant@290:   {
etisserant@290:     int loopback = 1;
Edouard@804:     err = setsockopt(*(int *)fd0, SOL_CAN_RAW, CAN_RAW_LOOPBACK,
etisserant@290:                &loopback, sizeof(loopback));
edouard@596:     if (err) {
Edouard@804:         fprintf(stderr, "setsockopt: %s\n", strerror (errno));
edouard@603:         goto error_close;
edouard@596:     }
etisserant@290:   }
etisserant@290:   
edouard@596: #ifndef RTCAN_SOCKET /*CAN_RAW_RECV_OWN_MSGS not supported in rtsocketcan*/
etisserant@290:   {
etisserant@290:     int recv_own_msgs = 0; /* 0 = disabled (default), 1 = enabled */
Edouard@804:     err = setsockopt(*(int *)fd0, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS,
etisserant@290:                &recv_own_msgs, sizeof(recv_own_msgs));
edouard@596:     if (err) {
Edouard@804:         fprintf(stderr, "setsockopt: %s\n", strerror (errno));
edouard@603:         goto error_close;
edouard@596:     }
etisserant@290:   }
edouard@596: #endif
etisserant@290:   
etisserant@196:   addr.can_family = AF_CAN;
etisserant@196:   addr.can_ifindex = ifr.ifr_ifindex;
Edouard@804:   err = bind (*(int *) fd0, (struct sockaddr *) &addr, sizeof (addr));
Edouard@804:   if (err)
Edouard@804:     {
Edouard@804:       fprintf (stderr, "Binding failed: %s\n", strerror (errno));
etisserant@196:       goto error_close;
etisserant@196:     }
etisserant@196: 
etisserant@196: #ifdef RTCAN_SOCKET
blaz@796:   tx_timeout = 10000000;    /* XXX Timeout is temporarily set to 10 ms */
Edouard@804:   err = ioctl (*(int *) fd0, RTCAN_RTIOC_SND_TIMEOUT, &tx_timeout);
blaz@796:   if (err)
blaz@796:     {
blaz@796:       fprintf (stderr,
blaz@796:           "Setting TX timeout %d failed: %s\n",
Edouard@804:           *baudrate, strerror (errno));
blaz@796:       goto error_close;
blaz@796:     }
blaz@796: 
etisserant@196:   baudrate = (can_baudrate_t *) & ifr.ifr_ifru;
etisserant@196:   *baudrate = TranslateBaudRate (board->baudrate);
etisserant@196:   if (!*baudrate)
etisserant@196:     goto error_close;
etisserant@196: 
Edouard@804:   err = ioctl (*(int *) fd0, SIOCSCANBAUDRATE, &ifr);
etisserant@196:   if (err)
etisserant@196:     {
etisserant@196:       fprintf (stderr,
etisserant@196: 	       "Setting baudrate %d failed: %s\n",
Edouard@804: 	       *baudrate, strerror (errno));
etisserant@196:       goto error_close;
etisserant@196:     }
etisserant@196: 
etisserant@196:   mode = (can_mode_t *) & ifr.ifr_ifru;
etisserant@196:   *mode = CAN_MODE_START;
Edouard@804:   err = ioctl (*(int *) fd0, SIOCSCANMODE, &ifr);
etisserant@196:   if (err)
etisserant@196:     {
etisserant@196:       fprintf (stderr, "Starting CAN device failed: %s\n",
Edouard@804: 	       strerror (errno));
etisserant@196:       goto error_close;
etisserant@196:     }
etisserant@196: #endif
etisserant@196: 
etisserant@196:   return fd0;
etisserant@196: 
etisserant@196: error_close:
Edouard@804:   close (*(int *) fd0);
etisserant@196: 
etisserant@196: error_ret:
etisserant@196:   free (fd0);
etisserant@196:   return NULL;
etisserant@196: }
etisserant@196: 
etisserant@196: /***************************************************************************/
etisserant@196: int
etisserant@196: canClose_driver (CAN_HANDLE fd0)
etisserant@196: {
etisserant@196:   if (fd0)
etisserant@196:     {
Edouard@804:       shutdown (*(int *) fd0, SHUT_RDWR);
Edouard@804:       close (*(int *) fd0);
etisserant@196:       free (fd0);
etisserant@196:     }
etisserant@196:   return 0;
etisserant@196: }