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