[deliverable/linux.git] / drivers / pnp / isapnp / proc.c

/*
 *  ISA Plug & Play support
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/module.h>
#include <linux/isapnp.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>

extern struct pnp_protocol isapnp_protocol;

static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;

static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
{
	loff_t new = -1;

	lock_kernel();
	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	case 2:
		new = 256 + off;
		break;
	}
	if (new < 0 || new > 256) {
		unlock_kernel();
		return -EINVAL;
	}
	unlock_kernel();
	return (file->f_pos = new);
}

static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
				    size_t nbytes, loff_t * ppos)
{
	struct inode *ino = file->f_path.dentry->d_inode;
	struct proc_dir_entry *dp = PDE(ino);
	struct pnp_dev *dev = dp->data;
	int pos = *ppos;
	int cnt, size = 256;

	if (pos >= size)
		return 0;
	if (nbytes >= size)
		nbytes = size;
	if (pos + nbytes > size)
		nbytes = size - pos;
	cnt = nbytes;

	if (!access_ok(VERIFY_WRITE, buf, cnt))
		return -EINVAL;

	isapnp_cfg_begin(dev->card->number, dev->number);
	for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
		unsigned char val;
		val = isapnp_read_byte(pos);
		__put_user(val, buf);
	}
	isapnp_cfg_end();

	*ppos = pos;
	return nbytes;
}

static const struct file_operations isapnp_proc_bus_file_operations = {
	.llseek = isapnp_proc_bus_lseek,
	.read = isapnp_proc_bus_read,
};

static int isapnp_proc_attach_device(struct pnp_dev *dev)
{
	struct pnp_card *bus = dev->card;
	struct proc_dir_entry *de, *e;
	char name[16];

	if (!(de = bus->procdir)) {
		sprintf(name, "%02x", bus->number);
		de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
		if (!de)
			return -ENOMEM;
	}
	sprintf(name, "%02x", dev->number);
	e = dev->procent = create_proc_entry(name, S_IFREG | S_IRUGO, de);
	if (!e)
		return -ENOMEM;
	e->proc_fops = &isapnp_proc_bus_file_operations;
	e->owner = THIS_MODULE;
	e->data = dev;
	e->size = 256;
	return 0;
}

#ifdef MODULE
static int __exit isapnp_proc_detach_device(struct pnp_dev *dev)
{
	struct pnp_card *bus = dev->card;
	struct proc_dir_entry *de;
	char name[16];

	if (!(de = bus->procdir))
		return -EINVAL;
	sprintf(name, "%02x", dev->number);
	remove_proc_entry(name, de);
	return 0;
}

static int __exit isapnp_proc_detach_bus(struct pnp_card *bus)
{
	struct proc_dir_entry *de;
	char name[16];

	if (!(de = bus->procdir))
		return -EINVAL;
	sprintf(name, "%02x", bus->number);
	remove_proc_entry(name, isapnp_proc_bus_dir);
	return 0;
}
#endif /* MODULE */

int __init isapnp_proc_init(void)
{
	struct pnp_dev *dev;
	isapnp_proc_bus_dir = proc_mkdir("isapnp", proc_bus);
	protocol_for_each_dev(&isapnp_protocol, dev) {
		isapnp_proc_attach_device(dev);
	}
	return 0;
}

#ifdef MODULE
int __exit isapnp_proc_done(void)
{
	struct pnp_dev *dev;
	struct pnp_bus *card;

	isapnp_for_each_dev(dev) {
		isapnp_proc_detach_device(dev);
	}
	isapnp_for_each_card(card) {
		isapnp_proc_detach_bus(card);
	}
	if (isapnp_proc_bus_dir)
		remove_proc_entry("isapnp", proc_bus);
	return 0;
}
#endif /* MODULE */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ISA Plug & Play support
	3	* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
	4	*
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*
	20	*/
	21
1da177e4 LT	22	#include <linux/module.h>
	23	#include <linux/isapnp.h>
	24	#include <linux/proc_fs.h>
	25	#include <linux/init.h>
	26	#include <linux/smp_lock.h>
	27	#include <asm/uaccess.h>
	28
	29	extern struct pnp_protocol isapnp_protocol;
	30
	31	static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
	32
	33	static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
	34	{
	35	loff_t new = -1;
	36
	37	lock_kernel();
	38	switch (whence) {
	39	case 0:
	40	new = off;
	41	break;
	42	case 1:
	43	new = file->f_pos + off;
	44	break;
	45	case 2:
	46	new = 256 + off;
	47	break;
	48	}
	49	if (new < 0 \|\| new > 256) {
	50	unlock_kernel();
	51	return -EINVAL;
	52	}
	53	unlock_kernel();
	54	return (file->f_pos = new);
	55	}
	56
9dd78466 BH	57	static ssize_t isapnp_proc_bus_read(struct file file, char __user buf,
9dd78466 BH	58	size_t nbytes, loff_t * ppos)
1da177e4	59	{
b23463b9	60	struct inode *ino = file->f_path.dentry->d_inode;
1da177e4 LT	61	struct proc_dir_entry *dp = PDE(ino);
	62	struct pnp_dev *dev = dp->data;
	63	int pos = *ppos;
	64	int cnt, size = 256;
	65
	66	if (pos >= size)
	67	return 0;
	68	if (nbytes >= size)
	69	nbytes = size;
	70	if (pos + nbytes > size)
	71	nbytes = size - pos;
	72	cnt = nbytes;
	73
	74	if (!access_ok(VERIFY_WRITE, buf, cnt))
	75	return -EINVAL;
	76
	77	isapnp_cfg_begin(dev->card->number, dev->number);
9dd78466	78	for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
1da177e4 LT	79	unsigned char val;
	80	val = isapnp_read_byte(pos);
	81	__put_user(val, buf);
	82	}
	83	isapnp_cfg_end();
	84
	85	*ppos = pos;
	86	return nbytes;
	87	}
	88
9dd78466 BH	89	static const struct file_operations isapnp_proc_bus_file_operations = {
	90	.llseek = isapnp_proc_bus_lseek,
	91	.read = isapnp_proc_bus_read,
1da177e4 LT	92	};
	93
	94	static int isapnp_proc_attach_device(struct pnp_dev *dev)
	95	{
	96	struct pnp_card *bus = dev->card;
	97	struct proc_dir_entry de, e;
	98	char name[16];
	99
	100	if (!(de = bus->procdir)) {
	101	sprintf(name, "%02x", bus->number);
	102	de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
	103	if (!de)
	104	return -ENOMEM;
	105	}
	106	sprintf(name, "%02x", dev->number);
	107	e = dev->procent = create_proc_entry(name, S_IFREG \| S_IRUGO, de);
	108	if (!e)
	109	return -ENOMEM;
	110	e->proc_fops = &isapnp_proc_bus_file_operations;
	111	e->owner = THIS_MODULE;
	112	e->data = dev;
	113	e->size = 256;
	114	return 0;
	115	}
	116
	117	#ifdef MODULE
	118	static int __exit isapnp_proc_detach_device(struct pnp_dev *dev)
	119	{
	120	struct pnp_card *bus = dev->card;
	121	struct proc_dir_entry *de;
	122	char name[16];
	123
	124	if (!(de = bus->procdir))
	125	return -EINVAL;
	126	sprintf(name, "%02x", dev->number);
	127	remove_proc_entry(name, de);
	128	return 0;
	129	}
	130
	131	static int __exit isapnp_proc_detach_bus(struct pnp_card *bus)
	132	{
	133	struct proc_dir_entry *de;
	134	char name[16];
	135
	136	if (!(de = bus->procdir))
	137	return -EINVAL;
	138	sprintf(name, "%02x", bus->number);
	139	remove_proc_entry(name, isapnp_proc_bus_dir);
	140	return 0;
	141	}
	142	#endif /* MODULE */
	143
	144	int __init isapnp_proc_init(void)
	145	{
	146	struct pnp_dev *dev;
	147	isapnp_proc_bus_dir = proc_mkdir("isapnp", proc_bus);
9dd78466	148	protocol_for_each_dev(&isapnp_protocol, dev) {
1da177e4 LT	149	isapnp_proc_attach_device(dev);
	150	}
	151	return 0;
	152	}
	153
	154	#ifdef MODULE
	155	int __exit isapnp_proc_done(void)
	156	{
	157	struct pnp_dev *dev;
	158	struct pnp_bus *card;
	159
	160	isapnp_for_each_dev(dev) {
	161	isapnp_proc_detach_device(dev);
	162	}
	163	isapnp_for_each_card(card) {
	164	isapnp_proc_detach_bus(card);
	165	}
	166	if (isapnp_proc_bus_dir)
	167	remove_proc_entry("isapnp", proc_bus);
	168	return 0;
	169	}
	170	#endif /* MODULE */