1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
// SPDX-License-Identifier: GPL-2.0+
/*
* /proc interface for comedi
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
*/
/*
* This is some serious bloatware.
*
* Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
* was cool.
*/
#include "comedidev.h"
#include "comedi_internal.h"
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static int comedi_read(struct seq_file *m, void *v)
{
int i;
int devices_q = 0;
struct comedi_driver *driv;
seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n",
"\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices");
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
struct comedi_device *dev = comedi_dev_get_from_minor(i);
if (!dev)
continue;
down_read(&dev->attach_lock);
if (dev->attached) {
devices_q = 1;
seq_printf(m, "%2d: %-20s %-20s %4d\n",
i, dev->driver->driver_name,
dev->board_name, dev->n_subdevices);
}
up_read(&dev->attach_lock);
comedi_dev_put(dev);
}
if (!devices_q)
seq_puts(m, "no devices\n");
mutex_lock(&comedi_drivers_list_lock);
for (driv = comedi_drivers; driv; driv = driv->next) {
seq_printf(m, "%s:\n", driv->driver_name);
for (i = 0; i < driv->num_names; i++)
seq_printf(m, " %s\n",
*(char **)((char *)driv->board_name +
i * driv->offset));
if (!driv->num_names)
seq_printf(m, " %s\n", driv->driver_name);
}
mutex_unlock(&comedi_drivers_list_lock);
return 0;
}
void __init comedi_proc_init(void)
{
if (!proc_create_single("comedi", 0444, NULL, comedi_read))
pr_warn("comedi: unable to create proc entry\n");
}
void comedi_proc_cleanup(void)
{
remove_proc_entry("comedi", NULL);
}
|
