1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * u_tcm.h
4  *
5  * Utility definitions for the tcm function
6  *
7  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
8  *		http://www.samsung.com
9  *
10  * Author: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
11  */
12 
13 #ifndef U_TCM_H
14 #define U_TCM_H
15 
16 #include <linux/usb/composite.h>
17 
18 /**
19  * @dependent: optional dependent module. Meant for legacy gadget.
20  * If non-null its refcount will be increased when a tpg is created and
21  * decreased when tpg is dropped.
22  * @dep_lock: lock for dependent module operations.
23  * @ready: true if the dependent module information is set.
24  * @can_attach: true a function can be bound to gadget
25  * @has_dep: true if there is a dependent module
26  *
27  */
28 struct f_tcm_opts {
29 	struct usb_function_instance	func_inst;
30 	struct module			*dependent;
31 	struct mutex			dep_lock;
32 	bool				ready;
33 	bool				can_attach;
34 	bool				has_dep;
35 
36 	/*
37 	 * Callbacks to be removed when legacy tcm gadget disappears.
38 	 *
39 	 * If you use the new function registration interface
40 	 * programmatically, you MUST set these callbacks to
41 	 * something sensible (e.g. probe/remove the composite).
42 	 */
43 	int (*tcm_register_callback)(struct usb_function_instance *);
44 	void (*tcm_unregister_callback)(struct usb_function_instance *);
45 };
46 
47 #endif /* U_TCM_H */
48