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_fops.h"
  34 #include <linux/proc_fs.h>
  35 #include <linux/string.h>
  36
  37 #ifdef CONFIG_PROC_FS
  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
  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
  95 void comedi_proc_cleanup(void)
  96 {
  97         remove_proc_entry("comedi", NULL);
  98 }
  99 #endif