1 /**************************************************************************/
2 /* File: ioctl.c - CAN driver IOCTL functions support */
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> */
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. */
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: */
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 /**************************************************************************/
35 #include "../include/can.h"
36 #include "../include/can_sysdep.h"
37 #include "../include/main.h"
38 #include "../include/ioctl.h"
40 long can_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
43 unsigned short channel=0;
44 unsigned btr0=0, btr1=0;
45 struct canuser_t *canuser = (struct canuser_t*)(file->private_data);
47 struct canchip_t *chip;
48 struct canque_ends_t *qends;
50 if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
51 CANMSG("can_ioctl: bad canuser magic\n");
55 obj = canuser->msgobj;
57 CANMSG("Could not assign buffer structure\n");
61 qends = canuser->qends;
64 CANMSG("Device is not correctly configured.\n");
65 CANMSG("Please reload the driver.\n");
71 return can_ioctl_query(canuser, arg);
74 for (i=0x0; i<0x100; i++)
75 CANMSG("0x%x is 0x%x\n",i,can_read_reg(chip,i));
79 if (chip->chipspecops->start_chip(chip))
84 if (chip->chipspecops->stop_chip(chip))
89 canque_flush(canuser->rx_edge0);
94 /* In- and output buffer re-initialization */
96 if(canuser->rx_edge0){
97 canque_set_filt(canuser->rx_edge0, arg, ~0, 0);
103 case CANQUE_FILTER: {
104 struct canfilt_t canfilt;
106 ret = copy_from_user(&canfilt, (void*)arg, sizeof(struct canfilt_t));
107 if(ret) return -EFAULT;
108 if(canuser->rx_edge0){
109 canque_set_filt(canuser->rx_edge0, canfilt.id, canfilt.mask, canfilt.flags);
116 struct canmsg_t rtr_msg;
118 ret = copy_from_user(&rtr_msg, (void*)arg, sizeof(struct canmsg_t));
119 if(ret) return -EFAULT;
120 ret = can_ioctl_remote_read(canuser, &rtr_msg, rtr_msg.id, 0);
121 if(ret<0) return ret;
122 ret = copy_to_user((void*)arg, &rtr_msg, sizeof(struct canmsg_t));
123 if(ret) return -EFAULT;
128 channel = arg & 0xff;
129 btr0 = (arg >> 8) & 0xff;
130 btr1 = (arg >> 16) & 0xff;
132 if (chip->chipspecops->set_btregs(chip, btr0, btr1)) {
133 CANMSG("Error setting bit timing registers\n");
139 case CONF_BAUDPARAMS: {
140 struct can_baudparams_t params;
143 ret = copy_from_user(¶ms, (void*)arg, sizeof(struct can_baudparams_t));
144 if(ret) return -EFAULT;
146 if(params.flags == -1) params.flags = 0;
147 if(params.baudrate == -1) params.baudrate = chip->baudrate;
148 if(params.sjw == -1) params.sjw = 0;
149 if(params.sample_pt == -1) params.sample_pt = 75;
150 i=chip->chipspecops->baud_rate(chip, params.baudrate, chip->clock, params.sjw,
151 params.sample_pt, params.flags);
152 if(i>=0) chip->baudrate = params.baudrate;
154 CANMSG("Error setting baud parameters\n");
162 CANMSG("Not a valid ioctl command\n");