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