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* u_tcm.h
* Utility definitions for the tcm function
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Author: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#ifndef U_TCM_H
#define U_TCM_H
#include <linux/usb/composite.h>
* @dependent: optional dependent module. Meant for legacy gadget.
* If non-null its refcount will be increased when a tpg is created and
* decreased when tpg is dropped.
* @dep_lock: lock for dependent module operations.
* @ready: true if the dependent module information is set.
* @can_attach: true a function can be bound to gadget
* @has_dep: true if there is a dependent module
struct f_tcm_opts {
struct usb_function_instance func_inst;
struct module *dependent;
struct mutex dep_lock;
bool ready;
bool can_attach;
bool has_dep;
* Callbacks to be removed when legacy tcm gadget disappears.
* If you use the new function registration interface
* programmatically, you MUST set these callbacks to
* something sensible (e.g. probe/remove the composite).
int (*tcm_register_callback)(struct usb_function_instance *);
void (*tcm_unregister_callback)(struct usb_function_instance *);
#endif /* U_TCM_H */