1/*
  2 *  ISA Plug & Play support
  3 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  4 *
  5 *   This program is free software; you can redistribute it and/or modify
  6 *   it under the terms of the GNU General Public License as published by
  7 *   the Free Software Foundation; either version 2 of the License, or
  8 *   (at your option) any later version.
  9 *
 10 *   This program is distributed in the hope that it will be useful,
 11 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13 *   GNU General Public License for more details.
 14 *
 15 *   You should have received a copy of the GNU General Public License
 16 *   along with this program; if not, write to the Free Software
 17 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 18 */
 19
 20#include <linux/module.h>
 21#include <linux/isapnp.h>
 22#include <linux/proc_fs.h>
 23#include <linux/init.h>
 24#include <asm/uaccess.h>
 25
 26extern struct pnp_protocol isapnp_protocol;
 27
 28static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
 29
 30static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
 31{
 32	return fixed_size_llseek(file, off, whence, 256);
 33}
 34
 35static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
 36				    size_t nbytes, loff_t * ppos)
 37{
 38	struct pnp_dev *dev = PDE_DATA(file_inode(file));
 39	int pos = *ppos;
 40	int cnt, size = 256;
 41
 42	if (pos >= size)
 43		return 0;
 44	if (nbytes >= size)
 45		nbytes = size;
 46	if (pos + nbytes > size)
 47		nbytes = size - pos;
 48	cnt = nbytes;
 49
 50	if (!access_ok(VERIFY_WRITE, buf, cnt))
 51		return -EINVAL;
 52
 53	isapnp_cfg_begin(dev->card->number, dev->number);
 54	for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
 55		unsigned char val;
 56		val = isapnp_read_byte(pos);
 57		__put_user(val, buf);
 58	}
 59	isapnp_cfg_end();
 60
 61	*ppos = pos;
 62	return nbytes;
 63}
 64
 65static const struct file_operations isapnp_proc_bus_file_operations = {
 66	.owner	= THIS_MODULE,
 67	.llseek = isapnp_proc_bus_lseek,
 68	.read = isapnp_proc_bus_read,
 69};
 70
 71static int isapnp_proc_attach_device(struct pnp_dev *dev)
 72{
 73	struct pnp_card *bus = dev->card;
 74	struct proc_dir_entry *de, *e;
 75	char name[16];
 76
 77	if (!(de = bus->procdir)) {
 78		sprintf(name, "%02x", bus->number);
 79		de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
 80		if (!de)
 81			return -ENOMEM;
 82	}
 83	sprintf(name, "%02x", dev->number);
 84	e = dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, de,
 85			&isapnp_proc_bus_file_operations, dev);
 86	if (!e)
 87		return -ENOMEM;
 88	proc_set_size(e, 256);
 89	return 0;
 90}
 91
 92int __init isapnp_proc_init(void)
 93{
 94	struct pnp_dev *dev;
 95
 96	isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL);
 97	protocol_for_each_dev(&isapnp_protocol, dev) {
 98		isapnp_proc_attach_device(dev);
 99	}
100	return 0;
101}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *  ISA Plug & Play support
 4 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5 */
 6
 7#include <linux/module.h>
 8#include <linux/isapnp.h>
 9#include <linux/proc_fs.h>
10#include <linux/init.h>
11#include <linux/uaccess.h>
12
13extern struct pnp_protocol isapnp_protocol;
14
15static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
16
17static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
18{
19	return fixed_size_llseek(file, off, whence, 256);
20}
21
22static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
23				    size_t nbytes, loff_t * ppos)
24{
25	struct pnp_dev *dev = pde_data(file_inode(file));
26	int pos = *ppos;
27	int cnt, size = 256;
28
29	if (pos >= size)
30		return 0;
31	if (nbytes >= size)
32		nbytes = size;
33	if (pos + nbytes > size)
34		nbytes = size - pos;
35	cnt = nbytes;
36
37	if (!access_ok(buf, cnt))
38		return -EINVAL;
39
40	isapnp_cfg_begin(dev->card->number, dev->number);
41	for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
42		unsigned char val;
43		val = isapnp_read_byte(pos);
44		__put_user(val, buf);
45	}
46	isapnp_cfg_end();
47
48	*ppos = pos;
49	return nbytes;
50}
51
52static const struct proc_ops isapnp_proc_bus_proc_ops = {
53	.proc_lseek	= isapnp_proc_bus_lseek,
54	.proc_read	= isapnp_proc_bus_read,
 
55};
56
57static int isapnp_proc_attach_device(struct pnp_dev *dev)
58{
59	struct pnp_card *bus = dev->card;
 
60	char name[16];
61
62	if (!bus->procdir) {
63		sprintf(name, "%02x", bus->number);
64		bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
65		if (!bus->procdir)
66			return -ENOMEM;
67	}
68	sprintf(name, "%02x", dev->number);
69	dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, bus->procdir,
70					    &isapnp_proc_bus_proc_ops, dev);
71	if (!dev->procent)
72		return -ENOMEM;
73	proc_set_size(dev->procent, 256);
74	return 0;
75}
76
77int __init isapnp_proc_init(void)
78{
79	struct pnp_dev *dev;
80
81	isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL);
82	protocol_for_each_dev(&isapnp_protocol, dev) {
83		isapnp_proc_attach_device(dev);
84	}
85	return 0;
86}