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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  /*
       3   * USB CDC Device Management userspace API definitions
       4   *
       5   * This program is free software; you can redistribute it and/or
       6   * modify it under the terms of the GNU General Public License
       7   * version 2 as published by the Free Software Foundation.
       8   */
       9  
      10  #ifndef __LINUX_USB_CDC_WDM_H
      11  #define __LINUX_USB_CDC_WDM_H
      12  
      13  #include <linux/types.h>
      14  
      15  /*
      16   * This IOCTL is used to retrieve the wMaxCommand for the device,
      17   * defining the message limit for both reading and writing.
      18   *
      19   * For CDC WDM functions this will be the wMaxCommand field of the
      20   * Device Management Functional Descriptor.
      21   */
      22  #define IOCTL_WDM_MAX_COMMAND _IOR('H', 0xA0, __u16)
      23  
      24  #endif /* __LINUX_USB_CDC_WDM_H */