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 <linux/proc_fs.h>
  34 /* #include <linux/string.h> */
  35
  36 int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
  37         int *eof, void *data);
  38
  39 extern struct comedi_driver *comedi_drivers;
  40
  41 int 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         struct 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
  88 void 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
  97 void comedi_proc_cleanup(void)
  98 {
  99         remove_proc_entry("comedi", 0);
 100 }
 101 #endif