Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 module/proc.c
3 /proc interface for comedi
4
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1998 David A. Schleef <ds@schleef.org>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24/*
25 This is some serious bloatware.
26
27 Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
28 was cool.
29*/
30
31#include "comedidev.h"
32#include "comedi_internal.h"
33#include <linux/proc_fs.h>
34#include <linux/string.h>
35
36static int comedi_read(char *buf, char **start, off_t offset, int len,
37 int *eof, void *data)
38{
39 int i;
40 int devices_q = 0;
41 int l = 0;
42 struct comedi_driver *driv;
43
44 l += sprintf(buf + l,
45 "comedi version " COMEDI_RELEASE "\n"
46 "format string: %s\n",
47 "\"%2d: %-20s %-20s %4d\", i, "
48 "driver_name, board_name, n_subdevices");
49
50 for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
51 struct comedi_device *dev = comedi_dev_from_minor(i);
52
53 if (!dev)
54 continue;
55
56 if (dev->attached) {
57 devices_q = 1;
58 l += sprintf(buf + l, "%2d: %-20s %-20s %4d\n",
59 i,
60 dev->driver->driver_name,
61 dev->board_name, dev->n_subdevices);
62 }
63 }
64 if (!devices_q)
65 l += sprintf(buf + l, "no devices\n");
66
67 for (driv = comedi_drivers; driv; driv = driv->next) {
68 l += sprintf(buf + l, "%s:\n", driv->driver_name);
69 for (i = 0; i < driv->num_names; i++) {
70 l += sprintf(buf + l, " %s\n",
71 *(char **)((char *)driv->board_name +
72 i * driv->offset));
73 }
74 if (!driv->num_names)
75 l += sprintf(buf + l, " %s\n", driv->driver_name);
76 }
77
78 return l;
79}
80
81void comedi_proc_init(void)
82{
83 struct proc_dir_entry *comedi_proc;
84
85 comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, NULL);
86 if (comedi_proc)
87 comedi_proc->read_proc = comedi_read;
88}
89
90void comedi_proc_cleanup(void)
91{
92 remove_proc_entry("comedi", NULL);
93}