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 */