proc.c revision c7427409cd071a34c4a13c5c24531b7a10334e31
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 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 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 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 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 86 return l; 87} 88 89#ifdef CONFIG_PROC_FS 90void comedi_proc_init(void) 91{ 92 struct proc_dir_entry *comedi_proc; 93 94 comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, 0); 95 if (comedi_proc) 96 comedi_proc->read_proc = comedi_read_procmem; 97} 98 99void comedi_proc_cleanup(void) 100{ 101 remove_proc_entry("comedi", 0); 102} 103#endif 104