LXR linux/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
  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