LXR linux/drivers/usb/gadget/function/u

   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 */
  28struct 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