proc.c revision dc1da7f7bae9e71e56f365d7e987760c88c116bd 
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#define __NO_VERSION__
32#include "comedidev.h"
33#include "comedi_fops.h"
34#include <linux/proc_fs.h>
35/* #include <linux/string.h> */
36
37int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
38			int *eof, void *data)
39{
40	int i;
41	int devices_q = 0;
42	int l = 0;
43	struct comedi_driver *driv;
44
45	l += sprintf(buf + l,
46		     "comedi version " COMEDI_RELEASE "\n"
47		     "format string: %s\n",
48		     "\"%2d: %-20s %-20s %4d\", i, "
49		     "driver_name, board_name, n_subdevices");
50
51	for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
52		struct comedi_device_file_info *dev_file_info =
53		    comedi_get_device_file_info(i);
54		struct comedi_device *dev;
55
56		if (dev_file_info == NULL)
57			continue;
58		dev = dev_file_info->device;
59
60		if (dev->attached) {
61			devices_q = 1;
62			l += sprintf(buf + l, "%2d: %-20s %-20s %4d\n",
63				     i,
64				     dev->driver->driver_name,
65				     dev->board_name, dev->n_subdevices);
66		}
67	}
68	if (!devices_q)
69		l += sprintf(buf + l, "no devices\n");
70
71	for (driv = comedi_drivers; driv; driv = driv->next) {
72		l += sprintf(buf + l, "%s:\n", driv->driver_name);
73		for (i = 0; i < driv->num_names; i++) {
74			l += sprintf(buf + l, " %s\n",
75				     *(char **)((char *)driv->board_name +
76						i * driv->offset));
77		}
78		if (!driv->num_names)
79			l += sprintf(buf + l, " %s\n", driv->driver_name);
80	}
81
82	return l;
83}
84
85#ifdef CONFIG_PROC_FS
86void comedi_proc_init(void)
87{
88	struct proc_dir_entry *comedi_proc;
89
90	comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, 0);
91	if (comedi_proc)
92		comedi_proc->read_proc = comedi_read_procmem;
93}
94
95void comedi_proc_cleanup(void)
96{
97	remove_proc_entry("comedi", 0);
98}
99#endif
100