| /* |
| * /proc interface for comedi |
| * |
| * COMEDI - Linux Control and Measurement Device Interface |
| * Copyright (C) 1998 David A. Schleef <ds@schleef.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| /* |
| * This is some serious bloatware. |
| * |
| * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it |
| * was cool. |
| */ |
| |
| #include "comedidev.h" |
| #include "comedi_internal.h" |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| |
| static int comedi_read(struct seq_file *m, void *v) |
| { |
| int i; |
| int devices_q = 0; |
| struct comedi_driver *driv; |
| |
| seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n", |
| "\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices"); |
| |
| for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { |
| struct comedi_device *dev = comedi_dev_get_from_minor(i); |
| |
| if (!dev) |
| continue; |
| |
| down_read(&dev->attach_lock); |
| if (dev->attached) { |
| devices_q = 1; |
| seq_printf(m, "%2d: %-20s %-20s %4d\n", |
| i, dev->driver->driver_name, |
| dev->board_name, dev->n_subdevices); |
| } |
| up_read(&dev->attach_lock); |
| comedi_dev_put(dev); |
| } |
| if (!devices_q) |
| seq_puts(m, "no devices\n"); |
| |
| mutex_lock(&comedi_drivers_list_lock); |
| for (driv = comedi_drivers; driv; driv = driv->next) { |
| seq_printf(m, "%s:\n", driv->driver_name); |
| for (i = 0; i < driv->num_names; i++) |
| seq_printf(m, " %s\n", |
| *(char **)((char *)driv->board_name + |
| i * driv->offset)); |
| |
| if (!driv->num_names) |
| seq_printf(m, " %s\n", driv->driver_name); |
| } |
| mutex_unlock(&comedi_drivers_list_lock); |
| |
| return 0; |
| } |
| |
| /* |
| * seq_file wrappers for procfile show routines. |
| */ |
| static int comedi_proc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, comedi_read, NULL); |
| } |
| |
| static const struct file_operations comedi_proc_fops = { |
| .owner = THIS_MODULE, |
| .open = comedi_proc_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| void __init comedi_proc_init(void) |
| { |
| if (!proc_create("comedi", 0444, NULL, &comedi_proc_fops)) |
| pr_warn("comedi: unable to create proc entry\n"); |
| } |
| |
| void comedi_proc_cleanup(void) |
| { |
| remove_proc_entry("comedi", NULL); |
| } |