usb_endian.h

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    1 /* $FreeBSD: releng/8.3/sys/dev/usb/usb_endian.h 196220 2009-08-14 20:09:31Z jhb $ */
    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_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/usb/usb_endian.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_endian.h