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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright IBM Corp. 2004 All Rights Reserved.4 *5 * Tape class device support6 *7 * Author: Stefan Bader <shbader@de.ibm.com>8 * Based on simple class device code by Greg K-H9 */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 3223 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 device33 * created by the call.34 *35 * device36 * The pointer to the struct device of the physical (base) device.37 * dev38 * The intended major/minor number. The major number may be 0 to39 * get a dynamic major number.40 * fops41 * The pointer to the drivers file operations for the tape device.42 * device_name43 * Pointer to the logical device name (will also be used as kobject name44 * of the cdev). This can also be called the name of the tape class45 * device.46 * mode_name47 * Points to the name of the tape mode. This creates a link with that48 * 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_name56);57void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);58 59#endif /* __TAPE_CLASS_H__ */60