Root/drivers/staging/comedi/proc.c

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_internal.h"
34#include <linux/proc_fs.h>
35#include <linux/string.h>
36
37#ifdef CONFIG_PROC_FS
38static 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
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, NULL);
91    if (comedi_proc)
92        comedi_proc->read_proc = comedi_read;
93}
94
95void comedi_proc_cleanup(void)
96{
97    remove_proc_entry("comedi", NULL);
98}
99#endif
100

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