// SPDX-License-Identifier: GPL-2.0+
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/*
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* /proc interface for comedi
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
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*/
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/*
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* This is some serious bloatware.
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*
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* Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
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* was cool.
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*/
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#include "comedidev.h"
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#include "comedi_internal.h"
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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static int comedi_read(struct seq_file *m, void *v)
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{
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int i;
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int devices_q = 0;
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struct comedi_driver *driv;
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seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n",
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"\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices");
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for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
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struct comedi_device *dev = comedi_dev_get_from_minor(i);
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if (!dev)
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continue;
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down_read(&dev->attach_lock);
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if (dev->attached) {
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devices_q = 1;
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seq_printf(m, "%2d: %-20s %-20s %4d\n",
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i, dev->driver->driver_name,
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dev->board_name, dev->n_subdevices);
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}
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up_read(&dev->attach_lock);
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comedi_dev_put(dev);
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}
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if (!devices_q)
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seq_puts(m, "no devices\n");
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mutex_lock(&comedi_drivers_list_lock);
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for (driv = comedi_drivers; driv; driv = driv->next) {
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seq_printf(m, "%s:\n", driv->driver_name);
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for (i = 0; i < driv->num_names; i++)
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seq_printf(m, " %s\n",
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*(char **)((char *)driv->board_name +
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i * driv->offset));
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if (!driv->num_names)
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seq_printf(m, " %s\n", driv->driver_name);
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}
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mutex_unlock(&comedi_drivers_list_lock);
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return 0;
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}
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void __init comedi_proc_init(void)
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{
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if (!proc_create_single("comedi", 0444, NULL, comedi_read))
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pr_warn("comedi: unable to create proc entry\n");
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}
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void comedi_proc_cleanup(void)
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{
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remove_proc_entry("comedi", NULL);
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}
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