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1// SPDX-License-Identifier: GPL-2.0+2/*3 * /proc interface for comedi4 *5 * COMEDI - Linux Control and Measurement Device Interface6 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>7 */8 9/*10 * This is some serious bloatware.11 *12 * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it13 * was cool.14 */15 16#include <linux/comedi/comedidev.h>17#include "comedi_internal.h"18#include <linux/proc_fs.h>19#include <linux/seq_file.h>20 21static int comedi_read(struct seq_file *m, void *v)22{23 int i;24 int devices_q = 0;25 struct comedi_driver *driv;26 27 seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n",28 "\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices");29 30 for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {31 struct comedi_device *dev = comedi_dev_get_from_minor(i);32 33 if (!dev)34 continue;35 36 down_read(&dev->attach_lock);37 if (dev->attached) {38 devices_q = 1;39 seq_printf(m, "%2d: %-20s %-20s %4d\n",40 i, dev->driver->driver_name,41 dev->board_name, dev->n_subdevices);42 }43 up_read(&dev->attach_lock);44 comedi_dev_put(dev);45 }46 if (!devices_q)47 seq_puts(m, "no devices\n");48 49 mutex_lock(&comedi_drivers_list_lock);50 for (driv = comedi_drivers; driv; driv = driv->next) {51 seq_printf(m, "%s:\n", driv->driver_name);52 for (i = 0; i < driv->num_names; i++)53 seq_printf(m, " %s\n",54 *(char **)((char *)driv->board_name +55 i * driv->offset));56 57 if (!driv->num_names)58 seq_printf(m, " %s\n", driv->driver_name);59 }60 mutex_unlock(&comedi_drivers_list_lock);61 62 return 0;63}64 65void __init comedi_proc_init(void)66{67 if (!proc_create_single("comedi", 0444, NULL, comedi_read))68 pr_warn("comedi: unable to create proc entry\n");69}70 71void comedi_proc_cleanup(void)72{73 remove_proc_entry("comedi", NULL);74}75