// SPDX-License-Identifier: GPL-2.0+/* * /proc interface for comedi * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 1998 David A. Schleef <ds@schleef.org> */ /* * 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;} void __init comedi_proc_init(void){	if (!proc_create_single("comedi", 0444, NULL, comedi_read))		pr_warn("comedi: unable to create proc entry\n");} void comedi_proc_cleanup(void){	remove_proc_entry("comedi", NULL);}