sys/bus/u4b/usb_endian.h

   1 /* $FreeBSD: head/sys/dev/usb/usb_endian.h 246122 2013-01-30 15:26:04Z hselasky $ */
   2 /*
   3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef _USB_ENDIAN_H_
  28 #define _USB_ENDIAN_H_
  29
  30 #include <sys/stdint.h>
  31 #include <sys/endian.h>
  32
  33 /*
  34  * Declare the basic USB record types. USB records have an alignment
  35  * of 1 byte and are always packed.
  36  */
  37 typedef uint8_t uByte;
  38 typedef uint8_t uWord[2];
  39 typedef uint8_t uDWord[4];
  40 typedef uint8_t uQWord[8];
  41
  42 /*
  43  * Define a set of macros that can get and set data independent of
  44  * CPU endianness and CPU alignment requirements:
  45  */
  46 #define UGETB(w)                        \
  47   ((w)[0])
  48
  49 #define UGETW(w)                        \
  50   ((w)[0] |                             \
  51   (((uint16_t)((w)[1])) << 8))
  52
  53 #define UGETDW(w)                       \
  54   ((w)[0] |                             \
  55   (((uint16_t)((w)[1])) << 8) |         \
  56   (((uint32_t)((w)[2])) << 16) |        \
  57   (((uint32_t)((w)[3])) << 24))
  58
  59 #define UGETQW(w)                       \
  60   ((w)[0] |                             \
  61   (((uint16_t)((w)[1])) << 8) |         \
  62   (((uint32_t)((w)[2])) << 16) |        \
  63   (((uint32_t)((w)[3])) << 24) |        \
  64   (((uint64_t)((w)[4])) << 32) |        \
  65   (((uint64_t)((w)[5])) << 40) |        \
  66   (((uint64_t)((w)[6])) << 48) |        \
  67   (((uint64_t)((w)[7])) << 56))
  68
  69 #define USETB(w,v) do {                 \
  70   (w)[0] = (uint8_t)(v);                \
  71 } while (0)
  72
  73 #define USETW(w,v) do {                 \
  74   (w)[0] = (uint8_t)(v);                \
  75   (w)[1] = (uint8_t)((v) >> 8);         \
  76 } while (0)
  77
  78 #define USETDW(w,v) do {                \
  79   (w)[0] = (uint8_t)(v);                \
  80   (w)[1] = (uint8_t)((v) >> 8);         \
  81   (w)[2] = (uint8_t)((v) >> 16);        \
  82   (w)[3] = (uint8_t)((v) >> 24);        \
  83 } while (0)
  84
  85 #define USETQW(w,v) do {                \
  86   (w)[0] = (uint8_t)(v);                \
  87   (w)[1] = (uint8_t)((v) >> 8);         \
  88   (w)[2] = (uint8_t)((v) >> 16);        \
  89   (w)[3] = (uint8_t)((v) >> 24);        \
  90   (w)[4] = (uint8_t)((v) >> 32);        \
  91   (w)[5] = (uint8_t)((v) >> 40);        \
  92   (w)[6] = (uint8_t)((v) >> 48);        \
  93   (w)[7] = (uint8_t)((v) >> 56);        \
  94 } while (0)
  95
  96 #define USETW2(w,b1,b0) do {            \
  97   (w)[0] = (uint8_t)(b0);               \
  98   (w)[1] = (uint8_t)(b1);               \
  99 } while (0)
 100
 101 #define USETW4(w,b3,b2,b1,b0) do {      \
 102   (w)[0] = (uint8_t)(b0);               \
 103   (w)[1] = (uint8_t)(b1);               \
 104   (w)[2] = (uint8_t)(b2);               \
 105   (w)[3] = (uint8_t)(b3);               \
 106 } while (0)
 107
 108 #define USETW8(w,b7,b6,b5,b4,b3,b2,b1,b0) do {  \
 109   (w)[0] = (uint8_t)(b0);               \
 110   (w)[1] = (uint8_t)(b1);               \
 111   (w)[2] = (uint8_t)(b2);               \
 112   (w)[3] = (uint8_t)(b3);               \
 113   (w)[4] = (uint8_t)(b4);               \
 114   (w)[5] = (uint8_t)(b5);               \
 115   (w)[6] = (uint8_t)(b6);               \
 116   (w)[7] = (uint8_t)(b7);               \
 117 } while (0)
 118
 119 #endif                                  /* _USB_ENDIAN_H_ */