1 /* 2 * u_tcm.h 3 * 4 * Utility definitions for the tcm function 5 * 6 * Copyright (c) 2015 Samsung Electronics Co., Ltd. 7 * http://www.samsung.com 8 * 9 * Author: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #ifndef U_TCM_H 17 #define U_TCM_H 18 19 #include <linux/usb/composite.h> 20 21 /** 22 * @dependent: optional dependent module. Meant for legacy gadget. 23 * If non-null its refcount will be increased when a tpg is created and 24 * decreased when tpg is dropped. 25 * @dep_lock: lock for dependent module operations. 26 * @ready: true if the dependent module information is set. 27 * @can_attach: true a function can be bound to gadget 28 * @has_dep: true if there is a dependent module 29 * 30 */ 31 struct f_tcm_opts { 32 struct usb_function_instance func_inst; 33 struct module *dependent; 34 struct mutex dep_lock; 35 bool ready; 36 bool can_attach; 37 bool has_dep; 38 39 /* 40 * Callbacks to be removed when legacy tcm gadget disappears. 41 * 42 * If you use the new function registration interface 43 * programmatically, you MUST set these callbacks to 44 * something sensible (e.g. probe/remove the composite). 45 */ 46 int (*tcm_register_callback)(struct usb_function_instance *); 47 void (*tcm_unregister_callback)(struct usb_function_instance *); 48 }; 49 50 #endif /* U_TCM_H */ 51