drivers/usb/gadget/function/u_midi.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * u_midi.h
   4  *
   5  * Utility definitions for the midi function
   6  *
   7  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
   8  *              http://www.samsung.com
   9  *
  10  * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  11  */
  12
  13 #ifndef U_MIDI_H
  14 #define U_MIDI_H
  15
  16 #include <linux/usb/composite.h>
  17
  18 struct f_midi_opts {
  19         struct usb_function_instance    func_inst;
  20         int                             index;
  21         char                            *id;
  22         bool                            id_allocated;
  23         unsigned int                    in_ports;
  24         unsigned int                    out_ports;
  25         unsigned int                    buflen;
  26         unsigned int                    qlen;
  27
  28         /*
  29          * Protect the data form concurrent access by read/write
  30          * and create symlink/remove symlink.
  31          */
  32          struct mutex                   lock;
  33          int                            refcnt;
  34 };
  35
  36 #endif /* U_MIDI_H */
  37