proc.c revision 71b5f4f11971dea972832ad63a994c7e5b45db6b 
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 <linux/proc_fs.h>
34/* #include <linux/string.h> */
35
36int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
37	int *eof, void *data);
38
39extern comedi_driver *comedi_drivers;
40
41int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
42	int *eof, void *data)
43{
44	int i;
45	int devices_q = 0;
46	int l = 0;
47	comedi_driver *driv;
48
49	l += sprintf(buf + l,
50		"comedi version " COMEDI_RELEASE "\n"
51		"format string: %s\n",
52		"\"%2d: %-20s %-20s %4d\",i,driver_name,board_name,n_subdevices");
53
54	for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
55		struct comedi_device_file_info *dev_file_info = comedi_get_device_file_info(i);
56		struct comedi_device *dev;
57
58		if (dev_file_info == NULL)
59			continue;
60		dev = dev_file_info->device;
61
62		if (dev->attached) {
63			devices_q = 1;
64			l += sprintf(buf + l, "%2d: %-20s %-20s %4d\n",
65				i,
66				dev->driver->driver_name,
67				dev->board_name, dev->n_subdevices);
68		}
69	}
70	if (!devices_q)
71		l += sprintf(buf + l, "no devices\n");
72
73	for (driv = comedi_drivers; driv; driv = driv->next) {
74		l += sprintf(buf + l, "%s:\n", driv->driver_name);
75		for (i = 0; i < driv->num_names; i++) {
76			l += sprintf(buf + l, " %s\n",
77				*(char **)((char *)driv->board_name +
78					i * driv->offset));
79		}
80		if (!driv->num_names)
81			l += sprintf(buf + l, " %s\n", driv->driver_name);
82	}
83
84	return l;
85}
86
87#ifdef CONFIG_PROC_FS
88void comedi_proc_init(void)
89{
90	struct proc_dir_entry *comedi_proc;
91
92	comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, 0);
93	if (comedi_proc)
94		comedi_proc->read_proc = comedi_read_procmem;
95}
96
97void comedi_proc_cleanup(void)
98{
99	remove_proc_entry("comedi", 0);
100}
101#endif
102