| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |