drivers/usb/gadget/function/u_printer.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * u_printer.h
   4  *
   5  * Utility definitions for the printer function
   6  *
   7  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   8  *              http://www.samsung.com
   9  *
  10  * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
  11  */
  12
  13 #ifndef U_PRINTER_H
  14 #define U_PRINTER_H
  15
  16 #include <linux/usb/composite.h>
  17
  18 struct f_printer_opts {
  19         struct usb_function_instance    func_inst;
  20         int                             minor;
  21         char                            *pnp_string;
  22         bool                            pnp_string_allocated;
  23         unsigned                        q_len;
  24
  25         /*
  26          * Protect the data from concurrent access by read/write
  27          * and create symlink/remove symlink
  28          */
  29         struct mutex                    lock;
  30         int                             refcnt;
  31 };
  32
  33 #endif /* U_PRINTER_H */