Merge tag 'topic/nvidia-gsp-2023-11-03' of git://anongit.freedesktop.org/drm/drm
[linux-2.6-microblaze.git] / drivers / comedi / proc.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
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
9 /*
10  * This is some serious bloatware.
11  *
12  * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
13  * 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
21 static 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
65 void __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
71 void comedi_proc_cleanup(void)
72 {
73         remove_proc_entry("comedi", NULL);
74 }