include/uapi/linux/patchkey.h

   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 _UAPI_LINUX_PATCHKEY_H
  19 #define _UAPI_LINUX_PATCHKEY_H
  20
  21 /* Endian macros. */
  22 #ifndef __KERNEL__
  23 #  include <endian.h>
  24 #endif
  25
  26 #if !defined(__KERNEL__)
  27 #if defined(__BYTE_ORDER)
  28 #  if __BYTE_ORDER == __BIG_ENDIAN
  29 #    define _PATCHKEY(id) (0xfd00|id)
  30 #  elif __BYTE_ORDER == __LITTLE_ENDIAN
  31 #    define _PATCHKEY(id) ((id<<8)|0x00fd)
  32 #  else
  33 #    error "could not determine byte order"
  34 #  endif
  35 #endif
  36 #endif
  37
  38 #endif /* _UAPI_LINUX_PATCHKEY_H */