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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  /*
       3   * <linux/patchkey.h> -- definition of _PATCHKEY macro
       4   *
       5   * Copyright (C) 2005 Stuart Brady
       6   *
       7   * This exists because awe_voice.h defined its own _PATCHKEY and it wasn't
       8   * clear whether removing this would break anything in userspace.
       9   *
      10   * Do not include this file directly.  Please use <sys/soundcard.h> instead.
      11   * For kernel code, use <linux/soundcard.h>
      12   */
      13  
      14  #ifndef _LINUX_PATCHKEY_H_INDIRECT
      15  #error "patchkey.h included directly"
      16  #endif
      17  
      18  #ifndef _LINUX_PATCHKEY_H
      19  #define _LINUX_PATCHKEY_H
      20  
      21  /* Endian macros. */
      22  #  include <endian.h>
      23  
      24  #if defined(__BYTE_ORDER)
      25  #  if __BYTE_ORDER == __BIG_ENDIAN
      26  #    define _PATCHKEY(id) (0xfd00|id)
      27  #  elif __BYTE_ORDER == __LITTLE_ENDIAN
      28  #    define _PATCHKEY(id) ((id<<8)|0x00fd)
      29  #  else
      30  #    error "could not determine byte order"
      31  #  endif
      32  #endif
      33  
      34  #endif /* _LINUX_PATCHKEY_H */