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/* SPDX-License-Identifier: GPL-2.0 */
* Copyright IBM Corp. 2004 All Rights Reserved.
* Tape class device support
* Author: Stefan Bader <>
* Based on simple class device code by Greg K-H
#ifndef __TAPE_CLASS_H__
#define __TAPE_CLASS_H__
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/kdev_t.h>
struct tape_class_device {
struct cdev *char_device;
struct device *class_device;
char device_name[TAPECLASS_NAME_LEN];
char mode_name[TAPECLASS_NAME_LEN];
* Register a tape device and return a pointer to the tape class device
* created by the call.
* device
* The pointer to the struct device of the physical (base) device.
* dev
* The intended major/minor number. The major number may be 0 to
* get a dynamic major number.
* fops
* The pointer to the drivers file operations for the tape device.
* device_name
* Pointer to the logical device name (will also be used as kobject name
* of the cdev). This can also be called the name of the tape class
* device.
* mode_name
* Points to the name of the tape mode. This creates a link with that
* name from the physical device to the logical device (class).
struct tape_class_device *register_tape_dev(
struct device * device,
dev_t dev,
const struct file_operations *fops,
char * device_name,
char * node_name
void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
#endif /* __TAPE_CLASS_H__ */