Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright IBM Corp. 2004   All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Tape class device support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Author: Stefan Bader <shbader@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Based on simple class device code by Greg K-H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef __TAPE_CLASS_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define __TAPE_CLASS_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kdev_t.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define TAPECLASS_NAME_LEN	32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct tape_class_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	struct cdev		*char_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	struct device		*class_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	char			device_name[TAPECLASS_NAME_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	char			mode_name[TAPECLASS_NAME_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  * Register a tape device and return a pointer to the tape class device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  * created by the call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  *	The pointer to the struct device of the physical (base) device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  * dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  *	The intended major/minor number. The major number may be 0 to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  *	get a dynamic major number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * fops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  *	The pointer to the drivers file operations for the tape device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  * device_name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  *	Pointer to the logical device name (will also be used as kobject name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  *	of the cdev). This can also be called the name of the tape class
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  *	device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)  * mode_name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  *	Points to the name of the tape mode. This creates a link with that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  *	name from the physical device to the logical device (class).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct tape_class_device *register_tape_dev(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	struct device *		device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	dev_t			dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	const struct file_operations *fops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	char *			device_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	char *			node_name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #endif /* __TAPE_CLASS_H__ */