2 * Linux CAN-bus device driver.
3 * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
4 * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
5 * email:pisa@cmp.felk.cvut.cz
6 * This software is released under the GPL-License.
7 * Version lincan-0.2 9 Jul 2003
10 #include "../include/can.h"
11 #include "../include/can_sysdep.h"
12 #include "../include/main.h"
13 #include "../include/ioctl.h"
14 #include "../include/i82527.h"
16 int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
19 unsigned short channel=0;
20 unsigned btr0=0, btr1=0;
21 struct canuser_t *canuser = (struct canuser_t*)(file->private_data);
24 struct canque_ends_t *qends;
26 if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
27 CANMSG("can_ioctl: bad canuser magic\n");
31 obj = canuser->msgobj;
33 CANMSG("Could not assign buffer structure\n");
37 qends = canuser->qends;
40 CANMSG("Device is not correctly configured.\n");
41 CANMSG("Please reload the driver.\n");
47 return can_ioctl_query(canuser, arg);
50 for (i=0x0; i<0x100; i++)
51 CANMSG("0x%x is 0x%x\n",i,can_read_reg(chip,i));
55 if (chip->chipspecops->start_chip(chip))
60 if (chip->chipspecops->stop_chip(chip))
65 canque_flush(canuser->rx_edge0);
70 /* In- and output buffer re-initialization */
72 if(canuser->rx_edge0){
73 canque_set_filt(canuser->rx_edge0, arg, ~0, 0);
80 struct canfilt_t canfilt;
81 copy_from_user(&canfilt, (void*)arg, sizeof(struct canfilt_t));
82 if(canuser->rx_edge0){
83 canque_set_filt(canuser->rx_edge0, canfilt.id, canfilt.mask, canfilt.flags);
90 btr0 = (arg >> 8) & 0xff;
91 btr1 = (arg >> 16) & 0xff;
93 if (chip->chipspecops->set_btregs(chip, btr0, btr1)) {
94 CANMSG("Error setting bit timing registers\n");
100 case CONF_BAUDPARAMS: {
101 struct can_baudparams_t params;
102 copy_from_user(¶ms, (void*)arg, sizeof(struct can_baudparams_t));
103 if(params.flags == -1) params.flags = 0;
104 if(params.baudrate == -1) params.baudrate = chip->baudrate;
105 if(params.sjw == -1) params.sjw = 0;
106 if(params.sample_pt == -1) params.sample_pt = 75;
107 i=chip->chipspecops->baud_rate(chip, params.baudrate, chip->clock, params.sjw,
108 params.sample_pt, params.flags);
109 if(i>=0) chip->baudrate = params.baudrate;
111 CANMSG("Error setting baud parameters\n");
119 CANMSG("Not a valid ioctl command\n");