| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright IBM Corp. 2004 All Rights Reserved. |
| * |
| * Tape class device support |
| * |
| * Author: Stefan Bader <shbader@de.ibm.com> |
| * 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> |
| |
| #define TAPECLASS_NAME_LEN 32 |
| |
| 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__ */ |