2009 lines
70 KiB
C
2009 lines
70 KiB
C
/*
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* Public libusb header file
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* Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
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* Copyright © 2007-2008 Daniel Drake <dsd@gentoo.org>
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* Copyright © 2012 Pete Batard <pete@akeo.ie>
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* Copyright © 2012 Nathan Hjelm <hjelmn@cs.unm.edu>
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* For more information, please visit: http://libusb.info
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef LIBUSB_H
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#define LIBUSB_H
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#ifdef _MSC_VER
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/* on MS environments, the inline keyword is available in C++ only */
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#if !defined(__cplusplus)
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#define inline __inline
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#endif
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/* ssize_t is also not available (copy/paste from MinGW) */
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#ifndef _SSIZE_T_DEFINED
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#define _SSIZE_T_DEFINED
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#undef ssize_t
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#ifdef _WIN64
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typedef __int64 ssize_t;
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#else
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typedef int ssize_t;
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#endif /* _WIN64 */
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#endif /* _SSIZE_T_DEFINED */
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#endif /* _MSC_VER */
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/* stdint.h is not available on older MSVC */
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#if defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H))
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typedef unsigned __int8 uint8_t;
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typedef unsigned __int16 uint16_t;
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typedef unsigned __int32 uint32_t;
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#else
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#include <stdint.h>
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#endif
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#if !defined(_WIN32_WCE)
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#include <sys/types.h>
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#endif
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#if defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__) || defined(__HAIKU__)
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#include <sys/time.h>
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#endif
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#include <time.h>
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#include <limits.h>
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/* 'interface' might be defined as a macro on Windows, so we need to
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* undefine it so as not to break the current libusb API, because
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* libusb_config_descriptor has an 'interface' member
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* As this can be problematic if you include windows.h after libusb.h
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* in your sources, we force windows.h to be included first. */
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#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE)
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#include <windows.h>
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#if defined(interface)
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#undef interface
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#endif
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#if !defined(__CYGWIN__)
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#include <winsock.h>
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#endif
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#endif
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
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#define LIBUSB_DEPRECATED_FOR(f) \
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__attribute__((deprecated("Use " #f " instead")))
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#else
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#define LIBUSB_DEPRECATED_FOR(f)
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#endif /* __GNUC__ */
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/** \def LIBUSB_CALL
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* \ingroup libusb_misc
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* libusb's Windows calling convention.
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*
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* Under Windows, the selection of available compilers and configurations
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* means that, unlike other platforms, there is not <em>one true calling
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* convention</em> (calling convention: the manner in which parameters are
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* passed to functions in the generated assembly code).
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*
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* Matching the Windows API itself, libusb uses the WINAPI convention (which
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* translates to the <tt>stdcall</tt> convention) and guarantees that the
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* library is compiled in this way. The public header file also includes
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* appropriate annotations so that your own software will use the right
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* convention, even if another convention is being used by default within
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* your codebase.
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*
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* The one consideration that you must apply in your software is to mark
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* all functions which you use as libusb callbacks with this LIBUSB_CALL
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* annotation, so that they too get compiled for the correct calling
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* convention.
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*
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* On non-Windows operating systems, this macro is defined as nothing. This
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* means that you can apply it to your code without worrying about
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* cross-platform compatibility.
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*/
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/* LIBUSB_CALL must be defined on both definition and declaration of libusb
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* functions. You'd think that declaration would be enough, but cygwin will
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* complain about conflicting types unless both are marked this way.
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* The placement of this macro is important too; it must appear after the
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* return type, before the function name. See internal documentation for
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* API_EXPORTED.
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*/
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#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE)
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#define LIBUSB_CALL WINAPI
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#else
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#define LIBUSB_CALL
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#endif
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/** \def LIBUSB_API_VERSION
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* \ingroup libusb_misc
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* libusb's API version.
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*
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* Since version 1.0.13, to help with feature detection, libusb defines
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* a LIBUSB_API_VERSION macro that gets increased every time there is a
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* significant change to the API, such as the introduction of a new call,
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* the definition of a new macro/enum member, or any other element that
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* libusb applications may want to detect at compilation time.
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*
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* The macro is typically used in an application as follows:
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* \code
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* #if defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01001234)
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* // Use one of the newer features from the libusb API
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* #endif
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* \endcode
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*
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* Internally, LIBUSB_API_VERSION is defined as follows:
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* (libusb major << 24) | (libusb minor << 16) | (16 bit incremental)
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*/
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#define LIBUSB_API_VERSION 0x01000105
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/* The following is kept for compatibility, but will be deprecated in the future */
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#define LIBUSBX_API_VERSION LIBUSB_API_VERSION
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \ingroup libusb_misc
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* Convert a 16-bit value from host-endian to little-endian format. On
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* little endian systems, this function does nothing. On big endian systems,
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* the bytes are swapped.
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* \param x the host-endian value to convert
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* \returns the value in little-endian byte order
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*/
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static inline uint16_t libusb_cpu_to_le16(const uint16_t x)
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{
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union {
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uint8_t b8[2];
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uint16_t b16;
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} _tmp;
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_tmp.b8[1] = (uint8_t) (x >> 8);
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_tmp.b8[0] = (uint8_t) (x & 0xff);
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return _tmp.b16;
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}
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/** \def libusb_le16_to_cpu
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* \ingroup libusb_misc
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* Convert a 16-bit value from little-endian to host-endian format. On
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* little endian systems, this function does nothing. On big endian systems,
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* the bytes are swapped.
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* \param x the little-endian value to convert
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* \returns the value in host-endian byte order
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*/
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#define libusb_le16_to_cpu libusb_cpu_to_le16
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/* standard USB stuff */
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/** \ingroup libusb_desc
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* Device and/or Interface Class codes */
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enum libusb_class_code {
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/** In the context of a \ref libusb_device_descriptor "device descriptor",
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* this bDeviceClass value indicates that each interface specifies its
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* own class information and all interfaces operate independently.
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*/
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LIBUSB_CLASS_PER_INTERFACE = 0,
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/** Audio class */
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LIBUSB_CLASS_AUDIO = 1,
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/** Communications class */
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LIBUSB_CLASS_COMM = 2,
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/** Human Interface Device class */
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LIBUSB_CLASS_HID = 3,
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/** Physical */
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LIBUSB_CLASS_PHYSICAL = 5,
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/** Printer class */
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LIBUSB_CLASS_PRINTER = 7,
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/** Image class */
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LIBUSB_CLASS_PTP = 6, /* legacy name from libusb-0.1 usb.h */
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LIBUSB_CLASS_IMAGE = 6,
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/** Mass storage class */
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LIBUSB_CLASS_MASS_STORAGE = 8,
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/** Hub class */
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LIBUSB_CLASS_HUB = 9,
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/** Data class */
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LIBUSB_CLASS_DATA = 10,
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/** Smart Card */
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LIBUSB_CLASS_SMART_CARD = 0x0b,
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/** Content Security */
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LIBUSB_CLASS_CONTENT_SECURITY = 0x0d,
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/** Video */
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LIBUSB_CLASS_VIDEO = 0x0e,
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/** Personal Healthcare */
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LIBUSB_CLASS_PERSONAL_HEALTHCARE = 0x0f,
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/** Diagnostic Device */
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LIBUSB_CLASS_DIAGNOSTIC_DEVICE = 0xdc,
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/** Wireless class */
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LIBUSB_CLASS_WIRELESS = 0xe0,
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/** Application class */
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LIBUSB_CLASS_APPLICATION = 0xfe,
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/** Class is vendor-specific */
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LIBUSB_CLASS_VENDOR_SPEC = 0xff
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};
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/** \ingroup libusb_desc
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* Descriptor types as defined by the USB specification. */
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enum libusb_descriptor_type {
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/** Device descriptor. See libusb_device_descriptor. */
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LIBUSB_DT_DEVICE = 0x01,
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/** Configuration descriptor. See libusb_config_descriptor. */
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LIBUSB_DT_CONFIG = 0x02,
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/** String descriptor */
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LIBUSB_DT_STRING = 0x03,
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/** Interface descriptor. See libusb_interface_descriptor. */
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LIBUSB_DT_INTERFACE = 0x04,
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/** Endpoint descriptor. See libusb_endpoint_descriptor. */
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LIBUSB_DT_ENDPOINT = 0x05,
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/** BOS descriptor */
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LIBUSB_DT_BOS = 0x0f,
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/** Device Capability descriptor */
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LIBUSB_DT_DEVICE_CAPABILITY = 0x10,
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/** HID descriptor */
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LIBUSB_DT_HID = 0x21,
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/** HID report descriptor */
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LIBUSB_DT_REPORT = 0x22,
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/** Physical descriptor */
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LIBUSB_DT_PHYSICAL = 0x23,
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/** Hub descriptor */
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LIBUSB_DT_HUB = 0x29,
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/** SuperSpeed Hub descriptor */
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LIBUSB_DT_SUPERSPEED_HUB = 0x2a,
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/** SuperSpeed Endpoint Companion descriptor */
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LIBUSB_DT_SS_ENDPOINT_COMPANION = 0x30
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};
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/* Descriptor sizes per descriptor type */
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#define LIBUSB_DT_DEVICE_SIZE 18
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#define LIBUSB_DT_CONFIG_SIZE 9
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#define LIBUSB_DT_INTERFACE_SIZE 9
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#define LIBUSB_DT_ENDPOINT_SIZE 7
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#define LIBUSB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
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#define LIBUSB_DT_HUB_NONVAR_SIZE 7
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#define LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE 6
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#define LIBUSB_DT_BOS_SIZE 5
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#define LIBUSB_DT_DEVICE_CAPABILITY_SIZE 3
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/* BOS descriptor sizes */
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#define LIBUSB_BT_USB_2_0_EXTENSION_SIZE 7
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#define LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE 10
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#define LIBUSB_BT_CONTAINER_ID_SIZE 20
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/* We unwrap the BOS => define its max size */
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#define LIBUSB_DT_BOS_MAX_SIZE ((LIBUSB_DT_BOS_SIZE) +\
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(LIBUSB_BT_USB_2_0_EXTENSION_SIZE) +\
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(LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE) +\
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(LIBUSB_BT_CONTAINER_ID_SIZE))
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#define LIBUSB_ENDPOINT_ADDRESS_MASK 0x0f /* in bEndpointAddress */
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#define LIBUSB_ENDPOINT_DIR_MASK 0x80
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/** \ingroup libusb_desc
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* Endpoint direction. Values for bit 7 of the
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* \ref libusb_endpoint_descriptor::bEndpointAddress "endpoint address" scheme.
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*/
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enum libusb_endpoint_direction {
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/** In: device-to-host */
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LIBUSB_ENDPOINT_IN = 0x80,
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/** Out: host-to-device */
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LIBUSB_ENDPOINT_OUT = 0x00
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};
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#define LIBUSB_TRANSFER_TYPE_MASK 0x03 /* in bmAttributes */
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/** \ingroup libusb_desc
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* Endpoint transfer type. Values for bits 0:1 of the
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* \ref libusb_endpoint_descriptor::bmAttributes "endpoint attributes" field.
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*/
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enum libusb_transfer_type {
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/** Control endpoint */
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LIBUSB_TRANSFER_TYPE_CONTROL = 0,
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/** Isochronous endpoint */
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LIBUSB_TRANSFER_TYPE_ISOCHRONOUS = 1,
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/** Bulk endpoint */
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LIBUSB_TRANSFER_TYPE_BULK = 2,
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/** Interrupt endpoint */
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LIBUSB_TRANSFER_TYPE_INTERRUPT = 3,
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/** Stream endpoint */
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LIBUSB_TRANSFER_TYPE_BULK_STREAM = 4,
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};
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/** \ingroup libusb_misc
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* Standard requests, as defined in table 9-5 of the USB 3.0 specifications */
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enum libusb_standard_request {
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/** Request status of the specific recipient */
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LIBUSB_REQUEST_GET_STATUS = 0x00,
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/** Clear or disable a specific feature */
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LIBUSB_REQUEST_CLEAR_FEATURE = 0x01,
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/* 0x02 is reserved */
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/** Set or enable a specific feature */
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LIBUSB_REQUEST_SET_FEATURE = 0x03,
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/* 0x04 is reserved */
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/** Set device address for all future accesses */
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LIBUSB_REQUEST_SET_ADDRESS = 0x05,
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/** Get the specified descriptor */
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LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06,
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/** Used to update existing descriptors or add new descriptors */
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LIBUSB_REQUEST_SET_DESCRIPTOR = 0x07,
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/** Get the current device configuration value */
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LIBUSB_REQUEST_GET_CONFIGURATION = 0x08,
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/** Set device configuration */
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LIBUSB_REQUEST_SET_CONFIGURATION = 0x09,
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/** Return the selected alternate setting for the specified interface */
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LIBUSB_REQUEST_GET_INTERFACE = 0x0A,
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/** Select an alternate interface for the specified interface */
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LIBUSB_REQUEST_SET_INTERFACE = 0x0B,
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/** Set then report an endpoint's synchronization frame */
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LIBUSB_REQUEST_SYNCH_FRAME = 0x0C,
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/** Sets both the U1 and U2 Exit Latency */
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LIBUSB_REQUEST_SET_SEL = 0x30,
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/** Delay from the time a host transmits a packet to the time it is
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* received by the device. */
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LIBUSB_SET_ISOCH_DELAY = 0x31,
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};
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/** \ingroup libusb_misc
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* Request type bits of the
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* \ref libusb_control_setup::bmRequestType "bmRequestType" field in control
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* transfers. */
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enum libusb_request_type {
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/** Standard */
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LIBUSB_REQUEST_TYPE_STANDARD = (0x00 << 5),
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/** Class */
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LIBUSB_REQUEST_TYPE_CLASS = (0x01 << 5),
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/** Vendor */
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LIBUSB_REQUEST_TYPE_VENDOR = (0x02 << 5),
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/** Reserved */
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LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5)
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};
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/** \ingroup libusb_misc
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* Recipient bits of the
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* \ref libusb_control_setup::bmRequestType "bmRequestType" field in control
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* transfers. Values 4 through 31 are reserved. */
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enum libusb_request_recipient {
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/** Device */
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LIBUSB_RECIPIENT_DEVICE = 0x00,
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/** Interface */
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LIBUSB_RECIPIENT_INTERFACE = 0x01,
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/** Endpoint */
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LIBUSB_RECIPIENT_ENDPOINT = 0x02,
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/** Other */
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LIBUSB_RECIPIENT_OTHER = 0x03,
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};
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#define LIBUSB_ISO_SYNC_TYPE_MASK 0x0C
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/** \ingroup libusb_desc
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* Synchronization type for isochronous endpoints. Values for bits 2:3 of the
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* \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in
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* libusb_endpoint_descriptor.
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*/
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enum libusb_iso_sync_type {
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/** No synchronization */
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LIBUSB_ISO_SYNC_TYPE_NONE = 0,
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/** Asynchronous */
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LIBUSB_ISO_SYNC_TYPE_ASYNC = 1,
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/** Adaptive */
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LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 2,
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/** Synchronous */
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LIBUSB_ISO_SYNC_TYPE_SYNC = 3
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};
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#define LIBUSB_ISO_USAGE_TYPE_MASK 0x30
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/** \ingroup libusb_desc
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* Usage type for isochronous endpoints. Values for bits 4:5 of the
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* \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in
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* libusb_endpoint_descriptor.
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*/
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enum libusb_iso_usage_type {
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/** Data endpoint */
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LIBUSB_ISO_USAGE_TYPE_DATA = 0,
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/** Feedback endpoint */
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LIBUSB_ISO_USAGE_TYPE_FEEDBACK = 1,
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/** Implicit feedback Data endpoint */
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LIBUSB_ISO_USAGE_TYPE_IMPLICIT = 2,
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};
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/** \ingroup libusb_desc
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* A structure representing the standard USB device descriptor. This
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* descriptor is documented in section 9.6.1 of the USB 3.0 specification.
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* All multiple-byte fields are represented in host-endian format.
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*/
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struct libusb_device_descriptor {
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/** Size of this descriptor (in bytes) */
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uint8_t bLength;
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/** Descriptor type. Will have value
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* \ref libusb_descriptor_type::LIBUSB_DT_DEVICE LIBUSB_DT_DEVICE in this
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* context. */
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uint8_t bDescriptorType;
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/** USB specification release number in binary-coded decimal. A value of
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* 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, etc. */
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uint16_t bcdUSB;
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/** USB-IF class code for the device. See \ref libusb_class_code. */
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uint8_t bDeviceClass;
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/** USB-IF subclass code for the device, qualified by the bDeviceClass
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* value */
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uint8_t bDeviceSubClass;
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/** USB-IF protocol code for the device, qualified by the bDeviceClass and
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* bDeviceSubClass values */
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uint8_t bDeviceProtocol;
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/** Maximum packet size for endpoint 0 */
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uint8_t bMaxPacketSize0;
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/** USB-IF vendor ID */
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uint16_t idVendor;
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/** USB-IF product ID */
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uint16_t idProduct;
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/** Device release number in binary-coded decimal */
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uint16_t bcdDevice;
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/** Index of string descriptor describing manufacturer */
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uint8_t iManufacturer;
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/** Index of string descriptor describing product */
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uint8_t iProduct;
|
|
|
|
/** Index of string descriptor containing device serial number */
|
|
uint8_t iSerialNumber;
|
|
|
|
/** Number of possible configurations */
|
|
uint8_t bNumConfigurations;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the standard USB endpoint descriptor. This
|
|
* descriptor is documented in section 9.6.6 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_endpoint_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in
|
|
* this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** The address of the endpoint described by this descriptor. Bits 0:3 are
|
|
* the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction,
|
|
* see \ref libusb_endpoint_direction.
|
|
*/
|
|
uint8_t bEndpointAddress;
|
|
|
|
/** Attributes which apply to the endpoint when it is configured using
|
|
* the bConfigurationValue. Bits 0:1 determine the transfer type and
|
|
* correspond to \ref libusb_transfer_type. Bits 2:3 are only used for
|
|
* isochronous endpoints and correspond to \ref libusb_iso_sync_type.
|
|
* Bits 4:5 are also only used for isochronous endpoints and correspond to
|
|
* \ref libusb_iso_usage_type. Bits 6:7 are reserved.
|
|
*/
|
|
uint8_t bmAttributes;
|
|
|
|
/** Maximum packet size this endpoint is capable of sending/receiving. */
|
|
uint16_t wMaxPacketSize;
|
|
|
|
/** Interval for polling endpoint for data transfers. */
|
|
uint8_t bInterval;
|
|
|
|
/** For audio devices only: the rate at which synchronization feedback
|
|
* is provided. */
|
|
uint8_t bRefresh;
|
|
|
|
/** For audio devices only: the address if the synch endpoint */
|
|
uint8_t bSynchAddress;
|
|
|
|
/** Extra descriptors. If libusb encounters unknown endpoint descriptors,
|
|
* it will store them here, should you wish to parse them. */
|
|
const unsigned char *extra;
|
|
|
|
/** Length of the extra descriptors, in bytes. */
|
|
int extra_length;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the standard USB interface descriptor. This
|
|
* descriptor is documented in section 9.6.5 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_interface_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_INTERFACE LIBUSB_DT_INTERFACE
|
|
* in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Number of this interface */
|
|
uint8_t bInterfaceNumber;
|
|
|
|
/** Value used to select this alternate setting for this interface */
|
|
uint8_t bAlternateSetting;
|
|
|
|
/** Number of endpoints used by this interface (excluding the control
|
|
* endpoint). */
|
|
uint8_t bNumEndpoints;
|
|
|
|
/** USB-IF class code for this interface. See \ref libusb_class_code. */
|
|
uint8_t bInterfaceClass;
|
|
|
|
/** USB-IF subclass code for this interface, qualified by the
|
|
* bInterfaceClass value */
|
|
uint8_t bInterfaceSubClass;
|
|
|
|
/** USB-IF protocol code for this interface, qualified by the
|
|
* bInterfaceClass and bInterfaceSubClass values */
|
|
uint8_t bInterfaceProtocol;
|
|
|
|
/** Index of string descriptor describing this interface */
|
|
uint8_t iInterface;
|
|
|
|
/** Array of endpoint descriptors. This length of this array is determined
|
|
* by the bNumEndpoints field. */
|
|
const struct libusb_endpoint_descriptor *endpoint;
|
|
|
|
/** Extra descriptors. If libusb encounters unknown interface descriptors,
|
|
* it will store them here, should you wish to parse them. */
|
|
const unsigned char *extra;
|
|
|
|
/** Length of the extra descriptors, in bytes. */
|
|
int extra_length;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A collection of alternate settings for a particular USB interface.
|
|
*/
|
|
struct libusb_interface {
|
|
/** Array of interface descriptors. The length of this array is determined
|
|
* by the num_altsetting field. */
|
|
const struct libusb_interface_descriptor *altsetting;
|
|
|
|
/** The number of alternate settings that belong to this interface */
|
|
int num_altsetting;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the standard USB configuration descriptor. This
|
|
* descriptor is documented in section 9.6.3 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_config_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_CONFIG LIBUSB_DT_CONFIG
|
|
* in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Total length of data returned for this configuration */
|
|
uint16_t wTotalLength;
|
|
|
|
/** Number of interfaces supported by this configuration */
|
|
uint8_t bNumInterfaces;
|
|
|
|
/** Identifier value for this configuration */
|
|
uint8_t bConfigurationValue;
|
|
|
|
/** Index of string descriptor describing this configuration */
|
|
uint8_t iConfiguration;
|
|
|
|
/** Configuration characteristics */
|
|
uint8_t bmAttributes;
|
|
|
|
/** Maximum power consumption of the USB device from this bus in this
|
|
* configuration when the device is fully operation. Expressed in units
|
|
* of 2 mA when the device is operating in high-speed mode and in units
|
|
* of 8 mA when the device is operating in super-speed mode. */
|
|
uint8_t MaxPower;
|
|
|
|
/** Array of interfaces supported by this configuration. The length of
|
|
* this array is determined by the bNumInterfaces field. */
|
|
const struct libusb_interface *interface;
|
|
|
|
/** Extra descriptors. If libusb encounters unknown configuration
|
|
* descriptors, it will store them here, should you wish to parse them. */
|
|
const unsigned char *extra;
|
|
|
|
/** Length of the extra descriptors, in bytes. */
|
|
int extra_length;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the superspeed endpoint companion
|
|
* descriptor. This descriptor is documented in section 9.6.7 of
|
|
* the USB 3.0 specification. All multiple-byte fields are represented in
|
|
* host-endian format.
|
|
*/
|
|
struct libusb_ss_endpoint_companion_descriptor {
|
|
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_SS_ENDPOINT_COMPANION in
|
|
* this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
|
|
/** The maximum number of packets the endpoint can send or
|
|
* receive as part of a burst. */
|
|
uint8_t bMaxBurst;
|
|
|
|
/** In bulk EP: bits 4:0 represents the maximum number of
|
|
* streams the EP supports. In isochronous EP: bits 1:0
|
|
* represents the Mult - a zero based value that determines
|
|
* the maximum number of packets within a service interval */
|
|
uint8_t bmAttributes;
|
|
|
|
/** The total number of bytes this EP will transfer every
|
|
* service interval. valid only for periodic EPs. */
|
|
uint16_t wBytesPerInterval;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A generic representation of a BOS Device Capability descriptor. It is
|
|
* advised to check bDevCapabilityType and call the matching
|
|
* libusb_get_*_descriptor function to get a structure fully matching the type.
|
|
*/
|
|
struct libusb_bos_dev_capability_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY
|
|
* LIBUSB_DT_DEVICE_CAPABILITY in this context. */
|
|
uint8_t bDescriptorType;
|
|
/** Device Capability type */
|
|
uint8_t bDevCapabilityType;
|
|
/** Device Capability data (bLength - 3 bytes) */
|
|
uint8_t dev_capability_data
|
|
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
|
|
[] /* valid C99 code */
|
|
#else
|
|
[0] /* non-standard, but usually working code */
|
|
#endif
|
|
;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the Binary Device Object Store (BOS) descriptor.
|
|
* This descriptor is documented in section 9.6.2 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_bos_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_BOS LIBUSB_DT_BOS
|
|
* in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Length of this descriptor and all of its sub descriptors */
|
|
uint16_t wTotalLength;
|
|
|
|
/** The number of separate device capability descriptors in
|
|
* the BOS */
|
|
uint8_t bNumDeviceCaps;
|
|
|
|
/** bNumDeviceCap Device Capability Descriptors */
|
|
struct libusb_bos_dev_capability_descriptor *dev_capability
|
|
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
|
|
[] /* valid C99 code */
|
|
#else
|
|
[0] /* non-standard, but usually working code */
|
|
#endif
|
|
;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the USB 2.0 Extension descriptor
|
|
* This descriptor is documented in section 9.6.2.1 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_usb_2_0_extension_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY
|
|
* LIBUSB_DT_DEVICE_CAPABILITY in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Capability type. Will have value
|
|
* \ref libusb_capability_type::LIBUSB_BT_USB_2_0_EXTENSION
|
|
* LIBUSB_BT_USB_2_0_EXTENSION in this context. */
|
|
uint8_t bDevCapabilityType;
|
|
|
|
/** Bitmap encoding of supported device level features.
|
|
* A value of one in a bit location indicates a feature is
|
|
* supported; a value of zero indicates it is not supported.
|
|
* See \ref libusb_usb_2_0_extension_attributes. */
|
|
uint32_t bmAttributes;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the SuperSpeed USB Device Capability descriptor
|
|
* This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification.
|
|
* All multiple-byte fields are represented in host-endian format.
|
|
*/
|
|
struct libusb_ss_usb_device_capability_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY
|
|
* LIBUSB_DT_DEVICE_CAPABILITY in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Capability type. Will have value
|
|
* \ref libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY
|
|
* LIBUSB_BT_SS_USB_DEVICE_CAPABILITY in this context. */
|
|
uint8_t bDevCapabilityType;
|
|
|
|
/** Bitmap encoding of supported device level features.
|
|
* A value of one in a bit location indicates a feature is
|
|
* supported; a value of zero indicates it is not supported.
|
|
* See \ref libusb_ss_usb_device_capability_attributes. */
|
|
uint8_t bmAttributes;
|
|
|
|
/** Bitmap encoding of the speed supported by this device when
|
|
* operating in SuperSpeed mode. See \ref libusb_supported_speed. */
|
|
uint16_t wSpeedSupported;
|
|
|
|
/** The lowest speed at which all the functionality supported
|
|
* by the device is available to the user. For example if the
|
|
* device supports all its functionality when connected at
|
|
* full speed and above then it sets this value to 1. */
|
|
uint8_t bFunctionalitySupport;
|
|
|
|
/** U1 Device Exit Latency. */
|
|
uint8_t bU1DevExitLat;
|
|
|
|
/** U2 Device Exit Latency. */
|
|
uint16_t bU2DevExitLat;
|
|
};
|
|
|
|
/** \ingroup libusb_desc
|
|
* A structure representing the Container ID descriptor.
|
|
* This descriptor is documented in section 9.6.2.3 of the USB 3.0 specification.
|
|
* All multiple-byte fields, except UUIDs, are represented in host-endian format.
|
|
*/
|
|
struct libusb_container_id_descriptor {
|
|
/** Size of this descriptor (in bytes) */
|
|
uint8_t bLength;
|
|
|
|
/** Descriptor type. Will have value
|
|
* \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY
|
|
* LIBUSB_DT_DEVICE_CAPABILITY in this context. */
|
|
uint8_t bDescriptorType;
|
|
|
|
/** Capability type. Will have value
|
|
* \ref libusb_capability_type::LIBUSB_BT_CONTAINER_ID
|
|
* LIBUSB_BT_CONTAINER_ID in this context. */
|
|
uint8_t bDevCapabilityType;
|
|
|
|
/** Reserved field */
|
|
uint8_t bReserved;
|
|
|
|
/** 128 bit UUID */
|
|
uint8_t ContainerID[16];
|
|
};
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Setup packet for control transfers. */
|
|
struct libusb_control_setup {
|
|
/** Request type. Bits 0:4 determine recipient, see
|
|
* \ref libusb_request_recipient. Bits 5:6 determine type, see
|
|
* \ref libusb_request_type. Bit 7 determines data transfer direction, see
|
|
* \ref libusb_endpoint_direction.
|
|
*/
|
|
uint8_t bmRequestType;
|
|
|
|
/** Request. If the type bits of bmRequestType are equal to
|
|
* \ref libusb_request_type::LIBUSB_REQUEST_TYPE_STANDARD
|
|
* "LIBUSB_REQUEST_TYPE_STANDARD" then this field refers to
|
|
* \ref libusb_standard_request. For other cases, use of this field is
|
|
* application-specific. */
|
|
uint8_t bRequest;
|
|
|
|
/** Value. Varies according to request */
|
|
uint16_t wValue;
|
|
|
|
/** Index. Varies according to request, typically used to pass an index
|
|
* or offset */
|
|
uint16_t wIndex;
|
|
|
|
/** Number of bytes to transfer */
|
|
uint16_t wLength;
|
|
};
|
|
|
|
#define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup))
|
|
|
|
/* libusb */
|
|
|
|
struct libusb_context;
|
|
struct libusb_device;
|
|
struct libusb_device_handle;
|
|
|
|
/** \ingroup libusb_lib
|
|
* Structure providing the version of the libusb runtime
|
|
*/
|
|
struct libusb_version {
|
|
/** Library major version. */
|
|
const uint16_t major;
|
|
|
|
/** Library minor version. */
|
|
const uint16_t minor;
|
|
|
|
/** Library micro version. */
|
|
const uint16_t micro;
|
|
|
|
/** Library nano version. */
|
|
const uint16_t nano;
|
|
|
|
/** Library release candidate suffix string, e.g. "-rc4". */
|
|
const char *rc;
|
|
|
|
/** For ABI compatibility only. */
|
|
const char* describe;
|
|
};
|
|
|
|
/** \ingroup libusb_lib
|
|
* Structure representing a libusb session. The concept of individual libusb
|
|
* sessions allows for your program to use two libraries (or dynamically
|
|
* load two modules) which both independently use libusb. This will prevent
|
|
* interference between the individual libusb users - for example
|
|
* libusb_set_debug() will not affect the other user of the library, and
|
|
* libusb_exit() will not destroy resources that the other user is still
|
|
* using.
|
|
*
|
|
* Sessions are created by libusb_init() and destroyed through libusb_exit().
|
|
* If your application is guaranteed to only ever include a single libusb
|
|
* user (i.e. you), you do not have to worry about contexts: pass NULL in
|
|
* every function call where a context is required. The default context
|
|
* will be used.
|
|
*
|
|
* For more information, see \ref libusb_contexts.
|
|
*/
|
|
typedef struct libusb_context libusb_context;
|
|
|
|
/** \ingroup libusb_dev
|
|
* Structure representing a USB device detected on the system. This is an
|
|
* opaque type for which you are only ever provided with a pointer, usually
|
|
* originating from libusb_get_device_list().
|
|
*
|
|
* Certain operations can be performed on a device, but in order to do any
|
|
* I/O you will have to first obtain a device handle using libusb_open().
|
|
*
|
|
* Devices are reference counted with libusb_ref_device() and
|
|
* libusb_unref_device(), and are freed when the reference count reaches 0.
|
|
* New devices presented by libusb_get_device_list() have a reference count of
|
|
* 1, and libusb_free_device_list() can optionally decrease the reference count
|
|
* on all devices in the list. libusb_open() adds another reference which is
|
|
* later destroyed by libusb_close().
|
|
*/
|
|
typedef struct libusb_device libusb_device;
|
|
|
|
|
|
/** \ingroup libusb_dev
|
|
* Structure representing a handle on a USB device. This is an opaque type for
|
|
* which you are only ever provided with a pointer, usually originating from
|
|
* libusb_open().
|
|
*
|
|
* A device handle is used to perform I/O and other operations. When finished
|
|
* with a device handle, you should call libusb_close().
|
|
*/
|
|
typedef struct libusb_device_handle libusb_device_handle;
|
|
|
|
/** \ingroup libusb_dev
|
|
* Speed codes. Indicates the speed at which the device is operating.
|
|
*/
|
|
enum libusb_speed {
|
|
/** The OS doesn't report or know the device speed. */
|
|
LIBUSB_SPEED_UNKNOWN = 0,
|
|
|
|
/** The device is operating at low speed (1.5MBit/s). */
|
|
LIBUSB_SPEED_LOW = 1,
|
|
|
|
/** The device is operating at full speed (12MBit/s). */
|
|
LIBUSB_SPEED_FULL = 2,
|
|
|
|
/** The device is operating at high speed (480MBit/s). */
|
|
LIBUSB_SPEED_HIGH = 3,
|
|
|
|
/** The device is operating at super speed (5000MBit/s). */
|
|
LIBUSB_SPEED_SUPER = 4,
|
|
};
|
|
|
|
/** \ingroup libusb_dev
|
|
* Supported speeds (wSpeedSupported) bitfield. Indicates what
|
|
* speeds the device supports.
|
|
*/
|
|
enum libusb_supported_speed {
|
|
/** Low speed operation supported (1.5MBit/s). */
|
|
LIBUSB_LOW_SPEED_OPERATION = 1,
|
|
|
|
/** Full speed operation supported (12MBit/s). */
|
|
LIBUSB_FULL_SPEED_OPERATION = 2,
|
|
|
|
/** High speed operation supported (480MBit/s). */
|
|
LIBUSB_HIGH_SPEED_OPERATION = 4,
|
|
|
|
/** Superspeed operation supported (5000MBit/s). */
|
|
LIBUSB_SUPER_SPEED_OPERATION = 8,
|
|
};
|
|
|
|
/** \ingroup libusb_dev
|
|
* Masks for the bits of the
|
|
* \ref libusb_usb_2_0_extension_descriptor::bmAttributes "bmAttributes" field
|
|
* of the USB 2.0 Extension descriptor.
|
|
*/
|
|
enum libusb_usb_2_0_extension_attributes {
|
|
/** Supports Link Power Management (LPM) */
|
|
LIBUSB_BM_LPM_SUPPORT = 2,
|
|
};
|
|
|
|
/** \ingroup libusb_dev
|
|
* Masks for the bits of the
|
|
* \ref libusb_ss_usb_device_capability_descriptor::bmAttributes "bmAttributes" field
|
|
* field of the SuperSpeed USB Device Capability descriptor.
|
|
*/
|
|
enum libusb_ss_usb_device_capability_attributes {
|
|
/** Supports Latency Tolerance Messages (LTM) */
|
|
LIBUSB_BM_LTM_SUPPORT = 2,
|
|
};
|
|
|
|
/** \ingroup libusb_dev
|
|
* USB capability types
|
|
*/
|
|
enum libusb_bos_type {
|
|
/** Wireless USB device capability */
|
|
LIBUSB_BT_WIRELESS_USB_DEVICE_CAPABILITY = 1,
|
|
|
|
/** USB 2.0 extensions */
|
|
LIBUSB_BT_USB_2_0_EXTENSION = 2,
|
|
|
|
/** SuperSpeed USB device capability */
|
|
LIBUSB_BT_SS_USB_DEVICE_CAPABILITY = 3,
|
|
|
|
/** Container ID type */
|
|
LIBUSB_BT_CONTAINER_ID = 4,
|
|
};
|
|
|
|
/** \ingroup libusb_misc
|
|
* Error codes. Most libusb functions return 0 on success or one of these
|
|
* codes on failure.
|
|
* You can call libusb_error_name() to retrieve a string representation of an
|
|
* error code or libusb_strerror() to get an end-user suitable description of
|
|
* an error code.
|
|
*/
|
|
enum libusb_error {
|
|
/** Success (no error) */
|
|
LIBUSB_SUCCESS = 0,
|
|
|
|
/** Input/output error */
|
|
LIBUSB_ERROR_IO = -1,
|
|
|
|
/** Invalid parameter */
|
|
LIBUSB_ERROR_INVALID_PARAM = -2,
|
|
|
|
/** Access denied (insufficient permissions) */
|
|
LIBUSB_ERROR_ACCESS = -3,
|
|
|
|
/** No such device (it may have been disconnected) */
|
|
LIBUSB_ERROR_NO_DEVICE = -4,
|
|
|
|
/** Entity not found */
|
|
LIBUSB_ERROR_NOT_FOUND = -5,
|
|
|
|
/** Resource busy */
|
|
LIBUSB_ERROR_BUSY = -6,
|
|
|
|
/** Operation timed out */
|
|
LIBUSB_ERROR_TIMEOUT = -7,
|
|
|
|
/** Overflow */
|
|
LIBUSB_ERROR_OVERFLOW = -8,
|
|
|
|
/** Pipe error */
|
|
LIBUSB_ERROR_PIPE = -9,
|
|
|
|
/** System call interrupted (perhaps due to signal) */
|
|
LIBUSB_ERROR_INTERRUPTED = -10,
|
|
|
|
/** Insufficient memory */
|
|
LIBUSB_ERROR_NO_MEM = -11,
|
|
|
|
/** Operation not supported or unimplemented on this platform */
|
|
LIBUSB_ERROR_NOT_SUPPORTED = -12,
|
|
|
|
/* NB: Remember to update LIBUSB_ERROR_COUNT below as well as the
|
|
message strings in strerror.c when adding new error codes here. */
|
|
|
|
/** Other error */
|
|
LIBUSB_ERROR_OTHER = -99,
|
|
};
|
|
|
|
/* Total number of error codes in enum libusb_error */
|
|
#define LIBUSB_ERROR_COUNT 14
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Transfer status codes */
|
|
enum libusb_transfer_status {
|
|
/** Transfer completed without error. Note that this does not indicate
|
|
* that the entire amount of requested data was transferred. */
|
|
LIBUSB_TRANSFER_COMPLETED,
|
|
|
|
/** Transfer failed */
|
|
LIBUSB_TRANSFER_ERROR,
|
|
|
|
/** Transfer timed out */
|
|
LIBUSB_TRANSFER_TIMED_OUT,
|
|
|
|
/** Transfer was cancelled */
|
|
LIBUSB_TRANSFER_CANCELLED,
|
|
|
|
/** For bulk/interrupt endpoints: halt condition detected (endpoint
|
|
* stalled). For control endpoints: control request not supported. */
|
|
LIBUSB_TRANSFER_STALL,
|
|
|
|
/** Device was disconnected */
|
|
LIBUSB_TRANSFER_NO_DEVICE,
|
|
|
|
/** Device sent more data than requested */
|
|
LIBUSB_TRANSFER_OVERFLOW,
|
|
|
|
/* NB! Remember to update libusb_error_name()
|
|
when adding new status codes here. */
|
|
};
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* libusb_transfer.flags values */
|
|
enum libusb_transfer_flags {
|
|
/** Report short frames as errors */
|
|
LIBUSB_TRANSFER_SHORT_NOT_OK = 1<<0,
|
|
|
|
/** Automatically free() transfer buffer during libusb_free_transfer().
|
|
* Note that buffers allocated with libusb_dev_mem_alloc() should not
|
|
* be attempted freed in this way, since free() is not an appropriate
|
|
* way to release such memory. */
|
|
LIBUSB_TRANSFER_FREE_BUFFER = 1<<1,
|
|
|
|
/** Automatically call libusb_free_transfer() after callback returns.
|
|
* If this flag is set, it is illegal to call libusb_free_transfer()
|
|
* from your transfer callback, as this will result in a double-free
|
|
* when this flag is acted upon. */
|
|
LIBUSB_TRANSFER_FREE_TRANSFER = 1<<2,
|
|
|
|
/** Terminate transfers that are a multiple of the endpoint's
|
|
* wMaxPacketSize with an extra zero length packet. This is useful
|
|
* when a device protocol mandates that each logical request is
|
|
* terminated by an incomplete packet (i.e. the logical requests are
|
|
* not separated by other means).
|
|
*
|
|
* This flag only affects host-to-device transfers to bulk and interrupt
|
|
* endpoints. In other situations, it is ignored.
|
|
*
|
|
* This flag only affects transfers with a length that is a multiple of
|
|
* the endpoint's wMaxPacketSize. On transfers of other lengths, this
|
|
* flag has no effect. Therefore, if you are working with a device that
|
|
* needs a ZLP whenever the end of the logical request falls on a packet
|
|
* boundary, then it is sensible to set this flag on <em>every</em>
|
|
* transfer (you do not have to worry about only setting it on transfers
|
|
* that end on the boundary).
|
|
*
|
|
* This flag is currently only supported on Linux.
|
|
* On other systems, libusb_submit_transfer() will return
|
|
* LIBUSB_ERROR_NOT_SUPPORTED for every transfer where this flag is set.
|
|
*
|
|
* Available since libusb-1.0.9.
|
|
*/
|
|
LIBUSB_TRANSFER_ADD_ZERO_PACKET = 1 << 3,
|
|
};
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Isochronous packet descriptor. */
|
|
struct libusb_iso_packet_descriptor {
|
|
/** Length of data to request in this packet */
|
|
unsigned int length;
|
|
|
|
/** Amount of data that was actually transferred */
|
|
unsigned int actual_length;
|
|
|
|
/** Status code for this packet */
|
|
enum libusb_transfer_status status;
|
|
};
|
|
|
|
struct libusb_transfer;
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Asynchronous transfer callback function type. When submitting asynchronous
|
|
* transfers, you pass a pointer to a callback function of this type via the
|
|
* \ref libusb_transfer::callback "callback" member of the libusb_transfer
|
|
* structure. libusb will call this function later, when the transfer has
|
|
* completed or failed. See \ref libusb_asyncio for more information.
|
|
* \param transfer The libusb_transfer struct the callback function is being
|
|
* notified about.
|
|
*/
|
|
typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer);
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* The generic USB transfer structure. The user populates this structure and
|
|
* then submits it in order to request a transfer. After the transfer has
|
|
* completed, the library populates the transfer with the results and passes
|
|
* it back to the user.
|
|
*/
|
|
struct libusb_transfer {
|
|
/** Handle of the device that this transfer will be submitted to */
|
|
libusb_device_handle *dev_handle;
|
|
|
|
/** A bitwise OR combination of \ref libusb_transfer_flags. */
|
|
uint8_t flags;
|
|
|
|
/** Address of the endpoint where this transfer will be sent. */
|
|
unsigned char endpoint;
|
|
|
|
/** Type of the endpoint from \ref libusb_transfer_type */
|
|
unsigned char type;
|
|
|
|
/** Timeout for this transfer in milliseconds. A value of 0 indicates no
|
|
* timeout. */
|
|
unsigned int timeout;
|
|
|
|
/** The status of the transfer. Read-only, and only for use within
|
|
* transfer callback function.
|
|
*
|
|
* If this is an isochronous transfer, this field may read COMPLETED even
|
|
* if there were errors in the frames. Use the
|
|
* \ref libusb_iso_packet_descriptor::status "status" field in each packet
|
|
* to determine if errors occurred. */
|
|
enum libusb_transfer_status status;
|
|
|
|
/** Length of the data buffer */
|
|
int length;
|
|
|
|
/** Actual length of data that was transferred. Read-only, and only for
|
|
* use within transfer callback function. Not valid for isochronous
|
|
* endpoint transfers. */
|
|
int actual_length;
|
|
|
|
/** Callback function. This will be invoked when the transfer completes,
|
|
* fails, or is cancelled. */
|
|
libusb_transfer_cb_fn callback;
|
|
|
|
/** User context data to pass to the callback function. */
|
|
void *user_data;
|
|
|
|
/** Data buffer */
|
|
unsigned char *buffer;
|
|
|
|
/** Number of isochronous packets. Only used for I/O with isochronous
|
|
* endpoints. */
|
|
int num_iso_packets;
|
|
|
|
/** Isochronous packet descriptors, for isochronous transfers only. */
|
|
struct libusb_iso_packet_descriptor iso_packet_desc
|
|
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
|
|
[] /* valid C99 code */
|
|
#else
|
|
[0] /* non-standard, but usually working code */
|
|
#endif
|
|
;
|
|
};
|
|
|
|
/** \ingroup libusb_misc
|
|
* Capabilities supported by an instance of libusb on the current running
|
|
* platform. Test if the loaded library supports a given capability by calling
|
|
* \ref libusb_has_capability().
|
|
*/
|
|
enum libusb_capability {
|
|
/** The libusb_has_capability() API is available. */
|
|
LIBUSB_CAP_HAS_CAPABILITY = 0x0000,
|
|
/** Hotplug support is available on this platform. */
|
|
LIBUSB_CAP_HAS_HOTPLUG = 0x0001,
|
|
/** The library can access HID devices without requiring user intervention.
|
|
* Note that before being able to actually access an HID device, you may
|
|
* still have to call additional libusb functions such as
|
|
* \ref libusb_detach_kernel_driver(). */
|
|
LIBUSB_CAP_HAS_HID_ACCESS = 0x0100,
|
|
/** The library supports detaching of the default USB driver, using
|
|
* \ref libusb_detach_kernel_driver(), if one is set by the OS kernel */
|
|
LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER = 0x0101
|
|
};
|
|
|
|
/** \ingroup libusb_lib
|
|
* Log message levels.
|
|
* - LIBUSB_LOG_LEVEL_NONE (0) : no messages ever printed by the library (default)
|
|
* - LIBUSB_LOG_LEVEL_ERROR (1) : error messages are printed to stderr
|
|
* - LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr
|
|
* - LIBUSB_LOG_LEVEL_INFO (3) : informational messages are printed to stdout, warning
|
|
* and error messages are printed to stderr
|
|
* - LIBUSB_LOG_LEVEL_DEBUG (4) : debug and informational messages are printed to stdout,
|
|
* warnings and errors to stderr
|
|
*/
|
|
enum libusb_log_level {
|
|
LIBUSB_LOG_LEVEL_NONE = 0,
|
|
LIBUSB_LOG_LEVEL_ERROR,
|
|
LIBUSB_LOG_LEVEL_WARNING,
|
|
LIBUSB_LOG_LEVEL_INFO,
|
|
LIBUSB_LOG_LEVEL_DEBUG,
|
|
};
|
|
|
|
int LIBUSB_CALL libusb_init(libusb_context **ctx);
|
|
void LIBUSB_CALL libusb_exit(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level);
|
|
const struct libusb_version * LIBUSB_CALL libusb_get_version(void);
|
|
int LIBUSB_CALL libusb_has_capability(uint32_t capability);
|
|
const char * LIBUSB_CALL libusb_error_name(int errcode);
|
|
int LIBUSB_CALL libusb_setlocale(const char *locale);
|
|
const char * LIBUSB_CALL libusb_strerror(enum libusb_error errcode);
|
|
|
|
ssize_t LIBUSB_CALL libusb_get_device_list(libusb_context *ctx,
|
|
libusb_device ***list);
|
|
void LIBUSB_CALL libusb_free_device_list(libusb_device **list,
|
|
int unref_devices);
|
|
libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev);
|
|
void LIBUSB_CALL libusb_unref_device(libusb_device *dev);
|
|
|
|
int LIBUSB_CALL libusb_get_configuration(libusb_device_handle *dev,
|
|
int *config);
|
|
int LIBUSB_CALL libusb_get_device_descriptor(libusb_device *dev,
|
|
struct libusb_device_descriptor *desc);
|
|
int LIBUSB_CALL libusb_get_active_config_descriptor(libusb_device *dev,
|
|
struct libusb_config_descriptor **config);
|
|
int LIBUSB_CALL libusb_get_config_descriptor(libusb_device *dev,
|
|
uint8_t config_index, struct libusb_config_descriptor **config);
|
|
int LIBUSB_CALL libusb_get_config_descriptor_by_value(libusb_device *dev,
|
|
uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
|
|
void LIBUSB_CALL libusb_free_config_descriptor(
|
|
struct libusb_config_descriptor *config);
|
|
int LIBUSB_CALL libusb_get_ss_endpoint_companion_descriptor(
|
|
struct libusb_context *ctx,
|
|
const struct libusb_endpoint_descriptor *endpoint,
|
|
struct libusb_ss_endpoint_companion_descriptor **ep_comp);
|
|
void LIBUSB_CALL libusb_free_ss_endpoint_companion_descriptor(
|
|
struct libusb_ss_endpoint_companion_descriptor *ep_comp);
|
|
int LIBUSB_CALL libusb_get_bos_descriptor(libusb_device_handle *dev_handle,
|
|
struct libusb_bos_descriptor **bos);
|
|
void LIBUSB_CALL libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos);
|
|
int LIBUSB_CALL libusb_get_usb_2_0_extension_descriptor(
|
|
struct libusb_context *ctx,
|
|
struct libusb_bos_dev_capability_descriptor *dev_cap,
|
|
struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension);
|
|
void LIBUSB_CALL libusb_free_usb_2_0_extension_descriptor(
|
|
struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension);
|
|
int LIBUSB_CALL libusb_get_ss_usb_device_capability_descriptor(
|
|
struct libusb_context *ctx,
|
|
struct libusb_bos_dev_capability_descriptor *dev_cap,
|
|
struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap);
|
|
void LIBUSB_CALL libusb_free_ss_usb_device_capability_descriptor(
|
|
struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap);
|
|
int LIBUSB_CALL libusb_get_container_id_descriptor(struct libusb_context *ctx,
|
|
struct libusb_bos_dev_capability_descriptor *dev_cap,
|
|
struct libusb_container_id_descriptor **container_id);
|
|
void LIBUSB_CALL libusb_free_container_id_descriptor(
|
|
struct libusb_container_id_descriptor *container_id);
|
|
uint8_t LIBUSB_CALL libusb_get_bus_number(libusb_device *dev);
|
|
uint8_t LIBUSB_CALL libusb_get_port_number(libusb_device *dev);
|
|
int LIBUSB_CALL libusb_get_port_numbers(libusb_device *dev, uint8_t* port_numbers, int port_numbers_len);
|
|
LIBUSB_DEPRECATED_FOR(libusb_get_port_numbers)
|
|
int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t* path, uint8_t path_length);
|
|
libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev);
|
|
uint8_t LIBUSB_CALL libusb_get_device_address(libusb_device *dev);
|
|
int LIBUSB_CALL libusb_get_device_speed(libusb_device *dev);
|
|
int LIBUSB_CALL libusb_get_max_packet_size(libusb_device *dev,
|
|
unsigned char endpoint);
|
|
int LIBUSB_CALL libusb_get_max_iso_packet_size(libusb_device *dev,
|
|
unsigned char endpoint);
|
|
|
|
int LIBUSB_CALL libusb_open(libusb_device *dev, libusb_device_handle **dev_handle);
|
|
void LIBUSB_CALL libusb_close(libusb_device_handle *dev_handle);
|
|
libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle);
|
|
|
|
int LIBUSB_CALL libusb_set_configuration(libusb_device_handle *dev_handle,
|
|
int configuration);
|
|
int LIBUSB_CALL libusb_claim_interface(libusb_device_handle *dev_handle,
|
|
int interface_number);
|
|
int LIBUSB_CALL libusb_release_interface(libusb_device_handle *dev_handle,
|
|
int interface_number);
|
|
|
|
libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid(
|
|
libusb_context *ctx, uint16_t vendor_id, uint16_t product_id);
|
|
|
|
int LIBUSB_CALL libusb_set_interface_alt_setting(libusb_device_handle *dev_handle,
|
|
int interface_number, int alternate_setting);
|
|
int LIBUSB_CALL libusb_clear_halt(libusb_device_handle *dev_handle,
|
|
unsigned char endpoint);
|
|
int LIBUSB_CALL libusb_reset_device(libusb_device_handle *dev_handle);
|
|
|
|
int LIBUSB_CALL libusb_alloc_streams(libusb_device_handle *dev_handle,
|
|
uint32_t num_streams, unsigned char *endpoints, int num_endpoints);
|
|
int LIBUSB_CALL libusb_free_streams(libusb_device_handle *dev_handle,
|
|
unsigned char *endpoints, int num_endpoints);
|
|
|
|
unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle,
|
|
size_t length);
|
|
int LIBUSB_CALL libusb_dev_mem_free(libusb_device_handle *dev_handle,
|
|
unsigned char *buffer, size_t length);
|
|
|
|
int LIBUSB_CALL libusb_kernel_driver_active(libusb_device_handle *dev_handle,
|
|
int interface_number);
|
|
int LIBUSB_CALL libusb_detach_kernel_driver(libusb_device_handle *dev_handle,
|
|
int interface_number);
|
|
int LIBUSB_CALL libusb_attach_kernel_driver(libusb_device_handle *dev_handle,
|
|
int interface_number);
|
|
int LIBUSB_CALL libusb_set_auto_detach_kernel_driver(
|
|
libusb_device_handle *dev_handle, int enable);
|
|
|
|
/* async I/O */
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Get the data section of a control transfer. This convenience function is here
|
|
* to remind you that the data does not start until 8 bytes into the actual
|
|
* buffer, as the setup packet comes first.
|
|
*
|
|
* Calling this function only makes sense from a transfer callback function,
|
|
* or situations where you have already allocated a suitably sized buffer at
|
|
* transfer->buffer.
|
|
*
|
|
* \param transfer a transfer
|
|
* \returns pointer to the first byte of the data section
|
|
*/
|
|
static inline unsigned char *libusb_control_transfer_get_data(
|
|
struct libusb_transfer *transfer)
|
|
{
|
|
return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Get the control setup packet of a control transfer. This convenience
|
|
* function is here to remind you that the control setup occupies the first
|
|
* 8 bytes of the transfer data buffer.
|
|
*
|
|
* Calling this function only makes sense from a transfer callback function,
|
|
* or situations where you have already allocated a suitably sized buffer at
|
|
* transfer->buffer.
|
|
*
|
|
* \param transfer a transfer
|
|
* \returns a casted pointer to the start of the transfer data buffer
|
|
*/
|
|
static inline struct libusb_control_setup *libusb_control_transfer_get_setup(
|
|
struct libusb_transfer *transfer)
|
|
{
|
|
return (struct libusb_control_setup *)(void *) transfer->buffer;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the setup packet (first 8 bytes of the data
|
|
* buffer) for a control transfer. The wIndex, wValue and wLength values should
|
|
* be given in host-endian byte order.
|
|
*
|
|
* \param buffer buffer to output the setup packet into
|
|
* This pointer must be aligned to at least 2 bytes boundary.
|
|
* \param bmRequestType see the
|
|
* \ref libusb_control_setup::bmRequestType "bmRequestType" field of
|
|
* \ref libusb_control_setup
|
|
* \param bRequest see the
|
|
* \ref libusb_control_setup::bRequest "bRequest" field of
|
|
* \ref libusb_control_setup
|
|
* \param wValue see the
|
|
* \ref libusb_control_setup::wValue "wValue" field of
|
|
* \ref libusb_control_setup
|
|
* \param wIndex see the
|
|
* \ref libusb_control_setup::wIndex "wIndex" field of
|
|
* \ref libusb_control_setup
|
|
* \param wLength see the
|
|
* \ref libusb_control_setup::wLength "wLength" field of
|
|
* \ref libusb_control_setup
|
|
*/
|
|
static inline void libusb_fill_control_setup(unsigned char *buffer,
|
|
uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
|
|
uint16_t wLength)
|
|
{
|
|
struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer;
|
|
setup->bmRequestType = bmRequestType;
|
|
setup->bRequest = bRequest;
|
|
setup->wValue = libusb_cpu_to_le16(wValue);
|
|
setup->wIndex = libusb_cpu_to_le16(wIndex);
|
|
setup->wLength = libusb_cpu_to_le16(wLength);
|
|
}
|
|
|
|
struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer(int iso_packets);
|
|
int LIBUSB_CALL libusb_submit_transfer(struct libusb_transfer *transfer);
|
|
int LIBUSB_CALL libusb_cancel_transfer(struct libusb_transfer *transfer);
|
|
void LIBUSB_CALL libusb_free_transfer(struct libusb_transfer *transfer);
|
|
void LIBUSB_CALL libusb_transfer_set_stream_id(
|
|
struct libusb_transfer *transfer, uint32_t stream_id);
|
|
uint32_t LIBUSB_CALL libusb_transfer_get_stream_id(
|
|
struct libusb_transfer *transfer);
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the required \ref libusb_transfer fields
|
|
* for a control transfer.
|
|
*
|
|
* If you pass a transfer buffer to this function, the first 8 bytes will
|
|
* be interpreted as a control setup packet, and the wLength field will be
|
|
* used to automatically populate the \ref libusb_transfer::length "length"
|
|
* field of the transfer. Therefore the recommended approach is:
|
|
* -# Allocate a suitably sized data buffer (including space for control setup)
|
|
* -# Call libusb_fill_control_setup()
|
|
* -# If this is a host-to-device transfer with a data stage, put the data
|
|
* in place after the setup packet
|
|
* -# Call this function
|
|
* -# Call libusb_submit_transfer()
|
|
*
|
|
* It is also legal to pass a NULL buffer to this function, in which case this
|
|
* function will not attempt to populate the length field. Remember that you
|
|
* must then populate the buffer and length fields later.
|
|
*
|
|
* \param transfer the transfer to populate
|
|
* \param dev_handle handle of the device that will handle the transfer
|
|
* \param buffer data buffer. If provided, this function will interpret the
|
|
* first 8 bytes as a setup packet and infer the transfer length from that.
|
|
* This pointer must be aligned to at least 2 bytes boundary.
|
|
* \param callback callback function to be invoked on transfer completion
|
|
* \param user_data user data to pass to callback function
|
|
* \param timeout timeout for the transfer in milliseconds
|
|
*/
|
|
static inline void libusb_fill_control_transfer(
|
|
struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
|
|
unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data,
|
|
unsigned int timeout)
|
|
{
|
|
struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer;
|
|
transfer->dev_handle = dev_handle;
|
|
transfer->endpoint = 0;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buffer;
|
|
if (setup)
|
|
transfer->length = (int) (LIBUSB_CONTROL_SETUP_SIZE
|
|
+ libusb_le16_to_cpu(setup->wLength));
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the required \ref libusb_transfer fields
|
|
* for a bulk transfer.
|
|
*
|
|
* \param transfer the transfer to populate
|
|
* \param dev_handle handle of the device that will handle the transfer
|
|
* \param endpoint address of the endpoint where this transfer will be sent
|
|
* \param buffer data buffer
|
|
* \param length length of data buffer
|
|
* \param callback callback function to be invoked on transfer completion
|
|
* \param user_data user data to pass to callback function
|
|
* \param timeout timeout for the transfer in milliseconds
|
|
*/
|
|
static inline void libusb_fill_bulk_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *dev_handle, unsigned char endpoint,
|
|
unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
|
|
void *user_data, unsigned int timeout)
|
|
{
|
|
transfer->dev_handle = dev_handle;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buffer;
|
|
transfer->length = length;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the required \ref libusb_transfer fields
|
|
* for a bulk transfer using bulk streams.
|
|
*
|
|
* Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103
|
|
*
|
|
* \param transfer the transfer to populate
|
|
* \param dev_handle handle of the device that will handle the transfer
|
|
* \param endpoint address of the endpoint where this transfer will be sent
|
|
* \param stream_id bulk stream id for this transfer
|
|
* \param buffer data buffer
|
|
* \param length length of data buffer
|
|
* \param callback callback function to be invoked on transfer completion
|
|
* \param user_data user data to pass to callback function
|
|
* \param timeout timeout for the transfer in milliseconds
|
|
*/
|
|
static inline void libusb_fill_bulk_stream_transfer(
|
|
struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
|
|
unsigned char endpoint, uint32_t stream_id,
|
|
unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
|
|
void *user_data, unsigned int timeout)
|
|
{
|
|
libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer,
|
|
length, callback, user_data, timeout);
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_BULK_STREAM;
|
|
libusb_transfer_set_stream_id(transfer, stream_id);
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the required \ref libusb_transfer fields
|
|
* for an interrupt transfer.
|
|
*
|
|
* \param transfer the transfer to populate
|
|
* \param dev_handle handle of the device that will handle the transfer
|
|
* \param endpoint address of the endpoint where this transfer will be sent
|
|
* \param buffer data buffer
|
|
* \param length length of data buffer
|
|
* \param callback callback function to be invoked on transfer completion
|
|
* \param user_data user data to pass to callback function
|
|
* \param timeout timeout for the transfer in milliseconds
|
|
*/
|
|
static inline void libusb_fill_interrupt_transfer(
|
|
struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
|
|
unsigned char endpoint, unsigned char *buffer, int length,
|
|
libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
|
|
{
|
|
transfer->dev_handle = dev_handle;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buffer;
|
|
transfer->length = length;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Helper function to populate the required \ref libusb_transfer fields
|
|
* for an isochronous transfer.
|
|
*
|
|
* \param transfer the transfer to populate
|
|
* \param dev_handle handle of the device that will handle the transfer
|
|
* \param endpoint address of the endpoint where this transfer will be sent
|
|
* \param buffer data buffer
|
|
* \param length length of data buffer
|
|
* \param num_iso_packets the number of isochronous packets
|
|
* \param callback callback function to be invoked on transfer completion
|
|
* \param user_data user data to pass to callback function
|
|
* \param timeout timeout for the transfer in milliseconds
|
|
*/
|
|
static inline void libusb_fill_iso_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *dev_handle, unsigned char endpoint,
|
|
unsigned char *buffer, int length, int num_iso_packets,
|
|
libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
|
|
{
|
|
transfer->dev_handle = dev_handle;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buffer;
|
|
transfer->length = length;
|
|
transfer->num_iso_packets = num_iso_packets;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Convenience function to set the length of all packets in an isochronous
|
|
* transfer, based on the num_iso_packets field in the transfer structure.
|
|
*
|
|
* \param transfer a transfer
|
|
* \param length the length to set in each isochronous packet descriptor
|
|
* \see libusb_get_max_packet_size()
|
|
*/
|
|
static inline void libusb_set_iso_packet_lengths(
|
|
struct libusb_transfer *transfer, unsigned int length)
|
|
{
|
|
int i;
|
|
for (i = 0; i < transfer->num_iso_packets; i++)
|
|
transfer->iso_packet_desc[i].length = length;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Convenience function to locate the position of an isochronous packet
|
|
* within the buffer of an isochronous transfer.
|
|
*
|
|
* This is a thorough function which loops through all preceding packets,
|
|
* accumulating their lengths to find the position of the specified packet.
|
|
* Typically you will assign equal lengths to each packet in the transfer,
|
|
* and hence the above method is sub-optimal. You may wish to use
|
|
* libusb_get_iso_packet_buffer_simple() instead.
|
|
*
|
|
* \param transfer a transfer
|
|
* \param packet the packet to return the address of
|
|
* \returns the base address of the packet buffer inside the transfer buffer,
|
|
* or NULL if the packet does not exist.
|
|
* \see libusb_get_iso_packet_buffer_simple()
|
|
*/
|
|
static inline unsigned char *libusb_get_iso_packet_buffer(
|
|
struct libusb_transfer *transfer, unsigned int packet)
|
|
{
|
|
int i;
|
|
size_t offset = 0;
|
|
int _packet;
|
|
|
|
/* oops..slight bug in the API. packet is an unsigned int, but we use
|
|
* signed integers almost everywhere else. range-check and convert to
|
|
* signed to avoid compiler warnings. FIXME for libusb-2. */
|
|
if (packet > INT_MAX)
|
|
return NULL;
|
|
_packet = (int) packet;
|
|
|
|
if (_packet >= transfer->num_iso_packets)
|
|
return NULL;
|
|
|
|
for (i = 0; i < _packet; i++)
|
|
offset += transfer->iso_packet_desc[i].length;
|
|
|
|
return transfer->buffer + offset;
|
|
}
|
|
|
|
/** \ingroup libusb_asyncio
|
|
* Convenience function to locate the position of an isochronous packet
|
|
* within the buffer of an isochronous transfer, for transfers where each
|
|
* packet is of identical size.
|
|
*
|
|
* This function relies on the assumption that every packet within the transfer
|
|
* is of identical size to the first packet. Calculating the location of
|
|
* the packet buffer is then just a simple calculation:
|
|
* <tt>buffer + (packet_size * packet)</tt>
|
|
*
|
|
* Do not use this function on transfers other than those that have identical
|
|
* packet lengths for each packet.
|
|
*
|
|
* \param transfer a transfer
|
|
* \param packet the packet to return the address of
|
|
* \returns the base address of the packet buffer inside the transfer buffer,
|
|
* or NULL if the packet does not exist.
|
|
* \see libusb_get_iso_packet_buffer()
|
|
*/
|
|
static inline unsigned char *libusb_get_iso_packet_buffer_simple(
|
|
struct libusb_transfer *transfer, unsigned int packet)
|
|
{
|
|
int _packet;
|
|
|
|
/* oops..slight bug in the API. packet is an unsigned int, but we use
|
|
* signed integers almost everywhere else. range-check and convert to
|
|
* signed to avoid compiler warnings. FIXME for libusb-2. */
|
|
if (packet > INT_MAX)
|
|
return NULL;
|
|
_packet = (int) packet;
|
|
|
|
if (_packet >= transfer->num_iso_packets)
|
|
return NULL;
|
|
|
|
return transfer->buffer + ((int) transfer->iso_packet_desc[0].length * _packet);
|
|
}
|
|
|
|
/* sync I/O */
|
|
|
|
int LIBUSB_CALL libusb_control_transfer(libusb_device_handle *dev_handle,
|
|
uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
|
|
unsigned char *data, uint16_t wLength, unsigned int timeout);
|
|
|
|
int LIBUSB_CALL libusb_bulk_transfer(libusb_device_handle *dev_handle,
|
|
unsigned char endpoint, unsigned char *data, int length,
|
|
int *actual_length, unsigned int timeout);
|
|
|
|
int LIBUSB_CALL libusb_interrupt_transfer(libusb_device_handle *dev_handle,
|
|
unsigned char endpoint, unsigned char *data, int length,
|
|
int *actual_length, unsigned int timeout);
|
|
|
|
/** \ingroup libusb_desc
|
|
* Retrieve a descriptor from the default control pipe.
|
|
* This is a convenience function which formulates the appropriate control
|
|
* message to retrieve the descriptor.
|
|
*
|
|
* \param dev_handle a device handle
|
|
* \param desc_type the descriptor type, see \ref libusb_descriptor_type
|
|
* \param desc_index the index of the descriptor to retrieve
|
|
* \param data output buffer for descriptor
|
|
* \param length size of data buffer
|
|
* \returns number of bytes returned in data, or LIBUSB_ERROR code on failure
|
|
*/
|
|
static inline int libusb_get_descriptor(libusb_device_handle *dev_handle,
|
|
uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length)
|
|
{
|
|
return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
|
|
LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t) ((desc_type << 8) | desc_index),
|
|
0, data, (uint16_t) length, 1000);
|
|
}
|
|
|
|
/** \ingroup libusb_desc
|
|
* Retrieve a descriptor from a device.
|
|
* This is a convenience function which formulates the appropriate control
|
|
* message to retrieve the descriptor. The string returned is Unicode, as
|
|
* detailed in the USB specifications.
|
|
*
|
|
* \param dev_handle a device handle
|
|
* \param desc_index the index of the descriptor to retrieve
|
|
* \param langid the language ID for the string descriptor
|
|
* \param data output buffer for descriptor
|
|
* \param length size of data buffer
|
|
* \returns number of bytes returned in data, or LIBUSB_ERROR code on failure
|
|
* \see libusb_get_string_descriptor_ascii()
|
|
*/
|
|
static inline int libusb_get_string_descriptor(libusb_device_handle *dev_handle,
|
|
uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
|
|
{
|
|
return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
|
|
LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t)((LIBUSB_DT_STRING << 8) | desc_index),
|
|
langid, data, (uint16_t) length, 1000);
|
|
}
|
|
|
|
int LIBUSB_CALL libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle,
|
|
uint8_t desc_index, unsigned char *data, int length);
|
|
|
|
/* polling and timeouts */
|
|
|
|
int LIBUSB_CALL libusb_try_lock_events(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_lock_events(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_unlock_events(libusb_context *ctx);
|
|
int LIBUSB_CALL libusb_event_handling_ok(libusb_context *ctx);
|
|
int LIBUSB_CALL libusb_event_handler_active(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_interrupt_event_handler(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_lock_event_waiters(libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_unlock_event_waiters(libusb_context *ctx);
|
|
int LIBUSB_CALL libusb_wait_for_event(libusb_context *ctx, struct timeval *tv);
|
|
|
|
int LIBUSB_CALL libusb_handle_events_timeout(libusb_context *ctx,
|
|
struct timeval *tv);
|
|
int LIBUSB_CALL libusb_handle_events_timeout_completed(libusb_context *ctx,
|
|
struct timeval *tv, int *completed);
|
|
int LIBUSB_CALL libusb_handle_events(libusb_context *ctx);
|
|
int LIBUSB_CALL libusb_handle_events_completed(libusb_context *ctx, int *completed);
|
|
int LIBUSB_CALL libusb_handle_events_locked(libusb_context *ctx,
|
|
struct timeval *tv);
|
|
int LIBUSB_CALL libusb_pollfds_handle_timeouts(libusb_context *ctx);
|
|
int LIBUSB_CALL libusb_get_next_timeout(libusb_context *ctx,
|
|
struct timeval *tv);
|
|
|
|
/** \ingroup libusb_poll
|
|
* File descriptor for polling
|
|
*/
|
|
struct libusb_pollfd {
|
|
/** Numeric file descriptor */
|
|
int fd;
|
|
|
|
/** Event flags to poll for from <poll.h>. POLLIN indicates that you
|
|
* should monitor this file descriptor for becoming ready to read from,
|
|
* and POLLOUT indicates that you should monitor this file descriptor for
|
|
* nonblocking write readiness. */
|
|
short events;
|
|
};
|
|
|
|
/** \ingroup libusb_poll
|
|
* Callback function, invoked when a new file descriptor should be added
|
|
* to the set of file descriptors monitored for events.
|
|
* \param fd the new file descriptor
|
|
* \param events events to monitor for, see \ref libusb_pollfd for a
|
|
* description
|
|
* \param user_data User data pointer specified in
|
|
* libusb_set_pollfd_notifiers() call
|
|
* \see libusb_set_pollfd_notifiers()
|
|
*/
|
|
typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events,
|
|
void *user_data);
|
|
|
|
/** \ingroup libusb_poll
|
|
* Callback function, invoked when a file descriptor should be removed from
|
|
* the set of file descriptors being monitored for events. After returning
|
|
* from this callback, do not use that file descriptor again.
|
|
* \param fd the file descriptor to stop monitoring
|
|
* \param user_data User data pointer specified in
|
|
* libusb_set_pollfd_notifiers() call
|
|
* \see libusb_set_pollfd_notifiers()
|
|
*/
|
|
typedef void (LIBUSB_CALL *libusb_pollfd_removed_cb)(int fd, void *user_data);
|
|
|
|
const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds(
|
|
libusb_context *ctx);
|
|
void LIBUSB_CALL libusb_free_pollfds(const struct libusb_pollfd **pollfds);
|
|
void LIBUSB_CALL libusb_set_pollfd_notifiers(libusb_context *ctx,
|
|
libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb,
|
|
void *user_data);
|
|
|
|
/** \ingroup libusb_hotplug
|
|
* Callback handle.
|
|
*
|
|
* Callbacks handles are generated by libusb_hotplug_register_callback()
|
|
* and can be used to deregister callbacks. Callback handles are unique
|
|
* per libusb_context and it is safe to call libusb_hotplug_deregister_callback()
|
|
* on an already deregisted callback.
|
|
*
|
|
* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* For more information, see \ref libusb_hotplug.
|
|
*/
|
|
typedef int libusb_hotplug_callback_handle;
|
|
|
|
/** \ingroup libusb_hotplug
|
|
*
|
|
* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* Flags for hotplug events */
|
|
typedef enum {
|
|
/** Default value when not using any flags. */
|
|
LIBUSB_HOTPLUG_NO_FLAGS = 0,
|
|
|
|
/** Arm the callback and fire it for all matching currently attached devices. */
|
|
LIBUSB_HOTPLUG_ENUMERATE = 1<<0,
|
|
} libusb_hotplug_flag;
|
|
|
|
/** \ingroup libusb_hotplug
|
|
*
|
|
* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* Hotplug events */
|
|
typedef enum {
|
|
/** A device has been plugged in and is ready to use */
|
|
LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED = 0x01,
|
|
|
|
/** A device has left and is no longer available.
|
|
* It is the user's responsibility to call libusb_close on any handle associated with a disconnected device.
|
|
* It is safe to call libusb_get_device_descriptor on a device that has left */
|
|
LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT = 0x02,
|
|
} libusb_hotplug_event;
|
|
|
|
/** \ingroup libusb_hotplug
|
|
* Wildcard matching for hotplug events */
|
|
#define LIBUSB_HOTPLUG_MATCH_ANY -1
|
|
|
|
/** \ingroup libusb_hotplug
|
|
* Hotplug callback function type. When requesting hotplug event notifications,
|
|
* you pass a pointer to a callback function of this type.
|
|
*
|
|
* This callback may be called by an internal event thread and as such it is
|
|
* recommended the callback do minimal processing before returning.
|
|
*
|
|
* libusb will call this function later, when a matching event had happened on
|
|
* a matching device. See \ref libusb_hotplug for more information.
|
|
*
|
|
* It is safe to call either libusb_hotplug_register_callback() or
|
|
* libusb_hotplug_deregister_callback() from within a callback function.
|
|
*
|
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* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* \param ctx context of this notification
|
|
* \param device libusb_device this event occurred on
|
|
* \param event event that occurred
|
|
* \param user_data user data provided when this callback was registered
|
|
* \returns bool whether this callback is finished processing events.
|
|
* returning 1 will cause this callback to be deregistered
|
|
*/
|
|
typedef int (LIBUSB_CALL *libusb_hotplug_callback_fn)(libusb_context *ctx,
|
|
libusb_device *device,
|
|
libusb_hotplug_event event,
|
|
void *user_data);
|
|
|
|
/** \ingroup libusb_hotplug
|
|
* Register a hotplug callback function
|
|
*
|
|
* Register a callback with the libusb_context. The callback will fire
|
|
* when a matching event occurs on a matching device. The callback is
|
|
* armed until either it is deregistered with libusb_hotplug_deregister_callback()
|
|
* or the supplied callback returns 1 to indicate it is finished processing events.
|
|
*
|
|
* If the \ref LIBUSB_HOTPLUG_ENUMERATE is passed the callback will be
|
|
* called with a \ref LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED for all devices
|
|
* already plugged into the machine. Note that libusb modifies its internal
|
|
* device list from a separate thread, while calling hotplug callbacks from
|
|
* libusb_handle_events(), so it is possible for a device to already be present
|
|
* on, or removed from, its internal device list, while the hotplug callbacks
|
|
* still need to be dispatched. This means that when using \ref
|
|
* LIBUSB_HOTPLUG_ENUMERATE, your callback may be called twice for the arrival
|
|
* of the same device, once from libusb_hotplug_register_callback() and once
|
|
* from libusb_handle_events(); and/or your callback may be called for the
|
|
* removal of a device for which an arrived call was never made.
|
|
*
|
|
* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* \param[in] ctx context to register this callback with
|
|
* \param[in] events bitwise or of events that will trigger this callback. See \ref
|
|
* libusb_hotplug_event
|
|
* \param[in] flags hotplug callback flags. See \ref libusb_hotplug_flag
|
|
* \param[in] vendor_id the vendor id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY
|
|
* \param[in] product_id the product id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY
|
|
* \param[in] dev_class the device class to match or \ref LIBUSB_HOTPLUG_MATCH_ANY
|
|
* \param[in] cb_fn the function to be invoked on a matching event/device
|
|
* \param[in] user_data user data to pass to the callback function
|
|
* \param[out] callback_handle pointer to store the handle of the allocated callback (can be NULL)
|
|
* \returns LIBUSB_SUCCESS on success LIBUSB_ERROR code on failure
|
|
*/
|
|
int LIBUSB_CALL libusb_hotplug_register_callback(libusb_context *ctx,
|
|
libusb_hotplug_event events,
|
|
libusb_hotplug_flag flags,
|
|
int vendor_id, int product_id,
|
|
int dev_class,
|
|
libusb_hotplug_callback_fn cb_fn,
|
|
void *user_data,
|
|
libusb_hotplug_callback_handle *callback_handle);
|
|
|
|
/** \ingroup libusb_hotplug
|
|
* Deregisters a hotplug callback.
|
|
*
|
|
* Deregister a callback from a libusb_context. This function is safe to call from within
|
|
* a hotplug callback.
|
|
*
|
|
* Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102
|
|
*
|
|
* \param[in] ctx context this callback is registered with
|
|
* \param[in] callback_handle the handle of the callback to deregister
|
|
*/
|
|
void LIBUSB_CALL libusb_hotplug_deregister_callback(libusb_context *ctx,
|
|
libusb_hotplug_callback_handle callback_handle);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|