2 * ISA Plug & Play support
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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.
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.
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.
20 #include <linux/module.h>
21 #include <linux/isapnp.h>
22 #include <linux/proc_fs.h>
23 #include <linux/init.h>
24 #include <linux/smp_lock.h>
25 #include <asm/uaccess.h>
27 extern struct pnp_protocol isapnp_protocol;
29 static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
31 static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
41 new = file->f_pos + off;
47 if (new < 0 || new > 256) {
52 return (file->f_pos = new);
55 static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
56 size_t nbytes, loff_t * ppos)
58 struct inode *ino = file->f_path.dentry->d_inode;
59 struct proc_dir_entry *dp = PDE(ino);
60 struct pnp_dev *dev = dp->data;
68 if (pos + nbytes > size)
72 if (!access_ok(VERIFY_WRITE, buf, cnt))
75 isapnp_cfg_begin(dev->card->number, dev->number);
76 for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
78 val = isapnp_read_byte(pos);
87 static const struct file_operations isapnp_proc_bus_file_operations = {
88 .llseek = isapnp_proc_bus_lseek,
89 .read = isapnp_proc_bus_read,
92 static int isapnp_proc_attach_device(struct pnp_dev *dev)
94 struct pnp_card *bus = dev->card;
95 struct proc_dir_entry *de, *e;
98 if (!(de = bus->procdir)) {
99 sprintf(name, "%02x", bus->number);
100 de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
104 sprintf(name, "%02x", dev->number);
105 e = dev->procent = create_proc_entry(name, S_IFREG | S_IRUGO, de);
108 e->proc_fops = &isapnp_proc_bus_file_operations;
109 e->owner = THIS_MODULE;
115 int __init isapnp_proc_init(void)
119 isapnp_proc_bus_dir = proc_mkdir("isapnp", proc_bus);
120 protocol_for_each_dev(&isapnp_protocol, dev) {
121 isapnp_proc_attach_device(dev);