include/linux/patchkey.h

   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 #elif defined(__BYTE_ORDER)
  36 #  if __BYTE_ORDER == __BIG_ENDIAN
  37 #    define _PATCHKEY(id) (0xfd00|id)
  38 #  elif __BYTE_ORDER == __LITTLE_ENDIAN
  39 #    define _PATCHKEY(id) ((id<<8)|0x00fd)
  40 #  else
  41 #    error "could not determine byte order"
  42 #  endif
  43 #endif
  44
  45 #endif /* _LINUX_PATCHKEY_H */