lincan/src/ioctl_rtl.c

   1 /**************************************************************************/
   2 /* File: ioctl_rtl.c - RT-Linux variant of IOCTL system call              */
   3 /*                                                                        */
   4 /* LinCAN - (Not only) Linux CAN bus driver                               */
   5 /* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
   6 /* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
   7 /* Funded by OCERA and FRESCOR IST projects                               */
   8 /* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
   9 /*                                                                        */
  10 /* LinCAN is free software; you can redistribute it and/or modify it      */
  11 /* under terms of the GNU General Public License as published by the      */
  12 /* Free Software Foundation; either version 2, or (at your option) any    */
  13 /* later version.  LinCAN is distributed in the hope that it will be      */
  14 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  15 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  16 /* General Public License for more details. You should have received a    */
  17 /* copy of the GNU General Public License along with LinCAN; see file     */
  18 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  19 /* Cambridge, MA 02139, USA.                                              */
  20 /*                                                                        */
  21 /* To allow use of LinCAN in the compact embedded systems firmware        */
  22 /* and RT-executives (RTEMS for example), main authors agree with next    */
  23 /* special exception:                                                     */
  24 /*                                                                        */
  25 /* Including LinCAN header files in a file, instantiating LinCAN generics */
  26 /* or templates, or linking other files with LinCAN objects to produce    */
  27 /* an application image/executable, does not by itself cause the          */
  28 /* resulting application image/executable to be covered by                */
  29 /* the GNU General Public License.                                        */
  30 /* This exception does not however invalidate any other reasons           */
  31 /* why the executable file might be covered by the GNU Public License.    */
  32 /* Publication of enhanced or derived LinCAN files is required although.  */
  33 /**************************************************************************/
  34
  35 #ifdef CAN_WITH_RTL
  36
  37 #include "../include/can.h"
  38 #include "../include/can_sysdep.h"
  39 #include "../include/main.h"
  40
  41 #include <rtl_posixio.h>
  42 #include "../include/ioctl.h"
  43 #include "../include/can_iortl.h"
  44
  45
  46 int can_ioctl_rtl_posix(struct rtl_file *fptr, unsigned int cmd, unsigned long arg)
  47 {
  48         struct canuser_t *canuser =
  49                 (struct canuser_t *)can_get_rtl_file_private_data(fptr);
  50         int i=0;
  51         unsigned short channel=0;
  52         unsigned btr0=0, btr1=0;
  53         struct msgobj_t *obj;
  54         struct canchip_t *chip;
  55         struct canque_ends_t *qends;
  56
  57         if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
  58                 CANMSG("can_ioctl_: bad canuser magic\n");
  59                 return -ENODEV;
  60         }
  61
  62         obj = canuser->msgobj;
  63         if (obj == NULL) {
  64                 CANMSG("Could not assign buffer structure\n");
  65                 return -1;
  66         }
  67
  68         qends = canuser->qends;
  69         chip = obj->hostchip;
  70         if (chip == NULL) {
  71                 CANMSG("Device is not correctly configured.\n");
  72                 CANMSG("Please reload the driver.\n");
  73                 return -1;
  74         }
  75
  76         switch (cmd) {
  77                 case CAN_DRV_QUERY: {
  78                         return can_ioctl_query(canuser, arg);
  79                 }
  80                 case STAT: {
  81                         for (i=0x0; i<0x100; i++)
  82                                 CANMSG("0x%x is 0x%x\n",i,can_read_reg(chip,i));
  83                         break;
  84                 }
  85                 case CMD_START: {
  86                         if (chip->chipspecops->start_chip(chip))
  87                                 return -1;
  88                         break;
  89                 }
  90                 case CMD_STOP: {
  91                         if (chip->chipspecops->stop_chip(chip))
  92                                 return -1;
  93                         break;
  94                 }
  95                 case CANQUE_FLUSH: {
  96                         canque_flush(canuser->rx_edge0);
  97                         break;
  98                 }
  99                 case CONF_FILTER: {
 100                         if(canuser->rx_edge0){
 101                                 canque_set_filt(canuser->rx_edge0, arg, ~0, 0);
 102                         }
 103
 104                         break;
 105                 }
 106
 107                 case CANQUE_FILTER: {
 108                         struct canfilt_t canfilt=*(struct canfilt_t *)arg;
 109                         if(canuser->rx_edge0){
 110                                 canque_set_filt(canuser->rx_edge0, canfilt.id, canfilt.mask, canfilt.flags);
 111                         }
 112                         break;
 113                 }
 114
 115                 case CONF_BAUD: {
 116                         channel = arg & 0xff;
 117                         btr0 = (arg >> 8) & 0xff;
 118                         btr1 = (arg >> 16) & 0xff;
 119
 120                         if (chip->chipspecops->set_btregs(chip, btr0, btr1)) {
 121                                 CANMSG("Error setting bit timing registers\n");
 122                                 return -1;
 123                         }
 124                         break;
 125                 }
 126                 default: {
 127                         CANMSG("Not a valid ioctl command\n");
 128                         return -EINVAL;
 129                 }
 130
 131         }
 132
 133         return 0;
 134 }
 135
 136 #endif /*CAN_WITH_RTL*/