linux/include/linux/patchkey.h
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   1/*
   2 * <linux/patchkey.h> -- definition of _PATCHKEY macro
   3 *
   4 * Copyright (C) 2005 Stuart Brady
   5 *
   6 * This exists because awe_voice.h defined its own _PATCHKEY and it wasn't
   7 * clear whether removing this would break anything in userspace.
   8 *
   9 * Do not include this file directly.  Please use <sys/soundcard.h> instead.
  10 * For kernel code, use <linux/soundcard.h>
  11 */
  12
  13#ifndef _LINUX_PATCHKEY_H_INDIRECT
  14#error "patchkey.h included directly"
  15#endif
  16
  17#ifndef _LINUX_PATCHKEY_H
  18#define _LINUX_PATCHKEY_H
  19
  20/* Endian macros. */
  21#ifdef __KERNEL__
  22#  include <asm/byteorder.h>
  23#else
  24#  include <endian.h>
  25#endif
  26
  27#if defined(__KERNEL__)
  28#  if defined(__BIG_ENDIAN)
  29#    define _PATCHKEY(id) (0xfd00|id)
  30#  elif defined(__LITTLE_ENDIAN)
  31#    define _PATCHKEY(id) ((id<<8)|0x00fd)
  32#  else
  33#    error "could not determine byte order"
  34#  endif
  35#else
  36#if defined(__BYTE_ORDER)
  37#  if __BYTE_ORDER == __BIG_ENDIAN
  38#    define _PATCHKEY(id) (0xfd00|id)
  39#  elif __BYTE_ORDER == __LITTLE_ENDIAN
  40#    define _PATCHKEY(id) ((id<<8)|0x00fd)
  41#  else
  42#    error "could not determine byte order"
  43#  endif
  44#endif
  45#endif
  46
  47#endif /* _LINUX_PATCHKEY_H */
  48
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