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 <linux/proc_fs.h>
  34/* #include <linux/string.h> */
  35
  36int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
  37                        int *eof, void *data);
  38
  39extern struct comedi_driver *comedi_drivers;
  40
  41int 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 =
  56                    comedi_get_device_file_info(i);
  57                struct comedi_device *dev;
  58
  59                if (dev_file_info == NULL)
  60                        continue;
  61                dev = dev_file_info->device;
  62
  63                if (dev->attached) {
  64                        devices_q = 1;
  65                        l += sprintf(buf + l, "%2d: %-20s %-20s %4d\n",
  66                                     i,
  67                                     dev->driver->driver_name,
  68                                     dev->board_name, dev->n_subdevices);
  69                }
  70        }
  71        if (!devices_q)
  72                l += sprintf(buf + l, "no devices\n");
  73
  74        for (driv = comedi_drivers; driv; driv = driv->next) {
  75                l += sprintf(buf + l, "%s:\n", driv->driver_name);
  76                for (i = 0; i < driv->num_names; i++) {
  77                        l += sprintf(buf + l, " %s\n",
  78                                     *(char **)((char *)driv->board_name +
  79                                                i * driv->offset));
  80                }
  81                if (!driv->num_names)
  82                        l += sprintf(buf + l, " %s\n", driv->driver_name);
  83        }
  84
  85        return l;
  86}
  87
  88#ifdef CONFIG_PROC_FS
  89void comedi_proc_init(void)
  90{
  91        struct proc_dir_entry *comedi_proc;
  92
  93        comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, 0);
  94        if (comedi_proc)
  95                comedi_proc->read_proc = comedi_read_procmem;
  96}
  97
  98void comedi_proc_cleanup(void)
  99{
 100        remove_proc_entry("comedi", 0);
 101}
 102#endif
 103