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 | |