usb_endian.h

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    1 /* $FreeBSD$ */
    2 /*
    3  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    4  *
    5  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #ifndef _USB_ENDIAN_H_
   30 #define _USB_ENDIAN_H_
   31 
   32 #ifndef USB_GLOBAL_INCLUDE_FILE
   33 #include <sys/stdint.h>
   34 #include <sys/endian.h>
   35 #endif
   36 
   37 /*
   38  * Declare the basic USB record types. USB records have an alignment
   39  * of 1 byte and are always packed.
   40  */
   41 typedef uint8_t uByte;
   42 typedef uint8_t uWord[2];
   43 typedef uint8_t uDWord[4];
   44 typedef uint8_t uQWord[8];
   45 
   46 /*
   47  * Define a set of macros that can get and set data independent of
   48  * CPU endianness and CPU alignment requirements:
   49  */
   50 #define UGETB(w)                        \
   51   ((w)[0])
   52 
   53 #define UGETW(w)                        \
   54   ((w)[0] |                             \
   55   (((uint16_t)((w)[1])) << 8))
   56 
   57 #define UGETDW(w)                       \
   58   ((w)[0] |                             \
   59   (((uint16_t)((w)[1])) << 8) |         \
   60   (((uint32_t)((w)[2])) << 16) |        \
   61   (((uint32_t)((w)[3])) << 24))
   62 
   63 #define UGETQW(w)                       \
   64   ((w)[0] |                             \
   65   (((uint16_t)((w)[1])) << 8) |         \
   66   (((uint32_t)((w)[2])) << 16) |        \
   67   (((uint32_t)((w)[3])) << 24) |        \
   68   (((uint64_t)((w)[4])) << 32) |        \
   69   (((uint64_t)((w)[5])) << 40) |        \
   70   (((uint64_t)((w)[6])) << 48) |        \
   71   (((uint64_t)((w)[7])) << 56))
   72 
   73 #define USETB(w,v) do {                 \
   74   (w)[0] = (uint8_t)(v);                \
   75 } while (0)
   76 
   77 #define USETW(w,v) do {                 \
   78   (w)[0] = (uint8_t)(v);                \
   79   (w)[1] = (uint8_t)((v) >> 8);         \
   80 } while (0)
   81 
   82 #define USETDW(w,v) do {                \
   83   (w)[0] = (uint8_t)(v);                \
   84   (w)[1] = (uint8_t)((v) >> 8);         \
   85   (w)[2] = (uint8_t)((v) >> 16);        \
   86   (w)[3] = (uint8_t)((v) >> 24);        \
   87 } while (0)
   88 
   89 #define USETQW(w,v) do {                \
   90   (w)[0] = (uint8_t)(v);                \
   91   (w)[1] = (uint8_t)((v) >> 8);         \
   92   (w)[2] = (uint8_t)((v) >> 16);        \
   93   (w)[3] = (uint8_t)((v) >> 24);        \
   94   (w)[4] = (uint8_t)((v) >> 32);        \
   95   (w)[5] = (uint8_t)((v) >> 40);        \
   96   (w)[6] = (uint8_t)((v) >> 48);        \
   97   (w)[7] = (uint8_t)((v) >> 56);        \
   98 } while (0)
   99 
  100 #define USETW2(w,b1,b0) do {            \
  101   (w)[0] = (uint8_t)(b0);               \
  102   (w)[1] = (uint8_t)(b1);               \
  103 } while (0)
  104 
  105 #define USETW4(w,b3,b2,b1,b0) do {      \
  106   (w)[0] = (uint8_t)(b0);               \
  107   (w)[1] = (uint8_t)(b1);               \
  108   (w)[2] = (uint8_t)(b2);               \
  109   (w)[3] = (uint8_t)(b3);               \
  110 } while (0)
  111 
  112 #define USETW8(w,b7,b6,b5,b4,b3,b2,b1,b0) do {  \
  113   (w)[0] = (uint8_t)(b0);               \
  114   (w)[1] = (uint8_t)(b1);               \
  115   (w)[2] = (uint8_t)(b2);               \
  116   (w)[3] = (uint8_t)(b3);               \
  117   (w)[4] = (uint8_t)(b4);               \
  118   (w)[5] = (uint8_t)(b5);               \
  119   (w)[6] = (uint8_t)(b6);               \
  120   (w)[7] = (uint8_t)(b7);               \
  121 } while (0)
  122 
  123 #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