1/*
2 * (C) Copyright IBM Corp. 2004   All Rights Reserved.
3 * tape_class.h
4 *
5 * Tape class device support
6 *
7 * Author: Stefan Bader <shbader@de.ibm.com>
8 * Based on simple class device code by Greg K-H
9 */
10#ifndef __TAPE_CLASS_H__
11#define __TAPE_CLASS_H__
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/fs.h>
16#include <linux/major.h>
17#include <linux/kobject.h>
18#include <linux/kobj_map.h>
19#include <linux/cdev.h>
20
21#include <linux/device.h>
22#include <linux/kdev_t.h>
23
24#define TAPECLASS_NAME_LEN	32
25
26struct tape_class_device {
27	struct cdev *		char_device;
28	struct class_device *	class_device;
29	char			device_name[TAPECLASS_NAME_LEN];
30	char			mode_name[TAPECLASS_NAME_LEN];
31};
32
33/*
34 * Register a tape device and return a pointer to the tape class device
35 * created by the call.
36 *
37 * device
38 *	The pointer to the struct device of the physical (base) device.
39 * dev
40 *	The intended major/minor number. The major number may be 0 to
41 *	get a dynamic major number.
42 * fops
43 *	The pointer to the drivers file operations for the tape device.
44 * device_name
45 *	Pointer to the logical device name (will also be used as kobject name
46 *	of the cdev). This can also be called the name of the tape class
47 *	device.
48 * mode_name
49 *	Points to the name of the tape mode. This creates a link with that
50 *	name from the physical device to the logical device (class).
51 */
52struct tape_class_device *register_tape_dev(
53	struct device *		device,
54	dev_t			dev,
55	const struct file_operations *fops,
56	char *			device_name,
57	char *			node_name
58);
59void unregister_tape_dev(struct tape_class_device *tcd);
60
61#endif /* __TAPE_CLASS_H__ */
62