kernel/drivers/usb/gadget/function/u_printer.h

   1 /*
   2  * u_printer.h
   3  *
   4  * Utility definitions for the printer function
   5  *
   6  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   7  *              http://www.samsung.com
   8  *
   9  * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #ifndef U_PRINTER_H
  17 #define U_PRINTER_H
  18
  19 #include <linux/usb/composite.h>
  20
  21 #define PNP_STRING_LEN                  1024
  22
  23 struct f_printer_opts {
  24         struct usb_function_instance    func_inst;
  25         int                             minor;
  26         char                            pnp_string[PNP_STRING_LEN];
  27         unsigned                        q_len;
  28
  29         /*
  30          * Protect the data from concurrent access by read/write
  31          * and create symlink/remove symlink
  32          */
  33         struct mutex                    lock;
  34         int                             refcnt;
  35 };
  36
  37 #endif /* U_PRINTER_H */