[mirror_ubuntu-focal-kernel.git] / drivers / s390 / char / tape_class.h

/*
 * 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__ */
Commit	Line	Data
1da177e4	1	/*
a53c8fab	2	* Copyright IBM Corp. 2004 All Rights Reserved.
1da177e4 LT	3	*
	4	* Tape class device support
	5	*
	6	* Author: Stefan Bader <shbader@de.ibm.com>
	7	* Based on simple class device code by Greg K-H
	8	*/
	9	#ifndef __TAPE_CLASS_H__
	10	#define __TAPE_CLASS_H__
	11
	12	#include <linux/init.h>
	13	#include <linux/module.h>
	14	#include <linux/fs.h>
	15	#include <linux/major.h>
1da177e4 LT	16	#include <linux/cdev.h>
	17
	18	#include <linux/device.h>
	19	#include <linux/kdev_t.h>
	20
	21	#define TAPECLASS_NAME_LEN 32
	22
	23	struct tape_class_device {
7f021ce1 CH	24	struct cdev *char_device;
7f021ce1 CH	25	struct device *class_device;
1da177e4 LT	26	char device_name[TAPECLASS_NAME_LEN];
	27	char mode_name[TAPECLASS_NAME_LEN];
	28	};
	29
	30	/*
	31	* Register a tape device and return a pointer to the tape class device
	32	* created by the call.
	33	*
	34	* device
	35	* The pointer to the struct device of the physical (base) device.
	36	* dev
	37	* The intended major/minor number. The major number may be 0 to
	38	* get a dynamic major number.
	39	* fops
	40	* The pointer to the drivers file operations for the tape device.
	41	* device_name
	42	* Pointer to the logical device name (will also be used as kobject name
	43	* of the cdev). This can also be called the name of the tape class
	44	* device.
	45	* mode_name
	46	* Points to the name of the tape mode. This creates a link with that
	47	* name from the physical device to the logical device (class).
	48	*/
	49	struct tape_class_device *register_tape_dev(
	50	struct device * device,
	51	dev_t dev,
9c2e08c5	52	const struct file_operations *fops,
1da177e4 LT	53	char * device_name,
	54	char * node_name
	55	);
92bf435f	56	void unregister_tape_dev(struct device device, struct tape_class_device tcd);
1da177e4 LT	57
1da177e4 LT	58	#endif /* __TAPE_CLASS_H__ */