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/cdev.h>
18
19#include <linux/device.h>
20#include <linux/kdev_t.h>
21
22#define TAPECLASS_NAME_LEN	32
23
24struct tape_class_device {
25	struct cdev		*char_device;
26	struct device		*class_device;
27	char			device_name[TAPECLASS_NAME_LEN];
28	char			mode_name[TAPECLASS_NAME_LEN];
29};
30
31/*
32 * Register a tape device and return a pointer to the tape class device
33 * created by the call.
34 *
35 * device
36 *	The pointer to the struct device of the physical (base) device.
37 * dev
38 *	The intended major/minor number. The major number may be 0 to
39 *	get a dynamic major number.
40 * fops
41 *	The pointer to the drivers file operations for the tape device.
42 * device_name
43 *	Pointer to the logical device name (will also be used as kobject name
44 *	of the cdev). This can also be called the name of the tape class
45 *	device.
46 * mode_name
47 *	Points to the name of the tape mode. This creates a link with that
48 *	name from the physical device to the logical device (class).
49 */
50struct tape_class_device *register_tape_dev(
51	struct device *		device,
52	dev_t			dev,
53	const struct file_operations *fops,
54	char *			device_name,
55	char *			node_name
56);
57void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
58
59#endif /* __TAPE_CLASS_H__ */
60