1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * u_tcm.h 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Utility definitions for the tcm function 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright (c) 2015 Samsung Electronics Co., Ltd. 8*4882a593Smuzhiyun * http://www.samsung.com 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * Author: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx> 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #ifndef U_TCM_H 14*4882a593Smuzhiyun #define U_TCM_H 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include <linux/usb/composite.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /** 19*4882a593Smuzhiyun * @dependent: optional dependent module. Meant for legacy gadget. 20*4882a593Smuzhiyun * If non-null its refcount will be increased when a tpg is created and 21*4882a593Smuzhiyun * decreased when tpg is dropped. 22*4882a593Smuzhiyun * @dep_lock: lock for dependent module operations. 23*4882a593Smuzhiyun * @ready: true if the dependent module information is set. 24*4882a593Smuzhiyun * @can_attach: true a function can be bound to gadget 25*4882a593Smuzhiyun * @has_dep: true if there is a dependent module 26*4882a593Smuzhiyun * 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun struct f_tcm_opts { 29*4882a593Smuzhiyun struct usb_function_instance func_inst; 30*4882a593Smuzhiyun struct module *dependent; 31*4882a593Smuzhiyun struct mutex dep_lock; 32*4882a593Smuzhiyun bool ready; 33*4882a593Smuzhiyun bool can_attach; 34*4882a593Smuzhiyun bool has_dep; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* 37*4882a593Smuzhiyun * Callbacks to be removed when legacy tcm gadget disappears. 38*4882a593Smuzhiyun * 39*4882a593Smuzhiyun * If you use the new function registration interface 40*4882a593Smuzhiyun * programmatically, you MUST set these callbacks to 41*4882a593Smuzhiyun * something sensible (e.g. probe/remove the composite). 42*4882a593Smuzhiyun */ 43*4882a593Smuzhiyun int (*tcm_register_callback)(struct usb_function_instance *); 44*4882a593Smuzhiyun void (*tcm_unregister_callback)(struct usb_function_instance *); 45*4882a593Smuzhiyun }; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #endif /* U_TCM_H */ 48