accounts/usbwallet: more missing files in vendor

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/README.md

@@ -0,0 +1,14 @@
+# libusb go wrapper
+
+This is a go wrapper around libusb
+
+The code is mostly copied from https://github.com/deadsy/libusb
+
+ALSO NOTE - there is a hardcoded device filter because of random windows errors
+
+## License
+
+Code is under GNU LGPL 2.1.
+
+* (C) Karel Bilek 2017
+* (c) 2017 Jason T. Harris (also see https://github.com/deadsy/libusb for comprehensive list)

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/AUTHORS

@@ -0,0 +1,89 @@
+Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
+Copyright © 2007-2009 Daniel Drake <dsd@gentoo.org>
+Copyright © 2010-2012 Peter Stuge <peter@stuge.se>
+Copyright © 2008-2016 Nathan Hjelm <hjelmn@users.sourceforge.net>
+Copyright © 2009-2013 Pete Batard <pete@akeo.ie>
+Copyright © 2009-2013 Ludovic Rousseau <ludovic.rousseau@gmail.com>
+Copyright © 2010-2012 Michael Plante <michael.plante@gmail.com>
+Copyright © 2011-2013 Hans de Goede <hdegoede@redhat.com>
+Copyright © 2012-2013 Martin Pieuchot <mpi@openbsd.org>
+Copyright © 2012-2013 Toby Gray <toby.gray@realvnc.com>
+Copyright © 2013-2015 Chris Dickens <christopher.a.dickens@gmail.com>
+
+Other contributors:
+Akshay Jaggi
+Alan Ott
+Alan Stern
+Alex Vatchenko
+Andrew Fernandes
+Anthony Clay
+Antonio Ospite
+Artem Egorkine
+Aurelien Jarno
+Bastien Nocera
+Bei Zhang
+Benjamin Dobell
+Carl Karsten
+Colin Walters
+Dave Camarillo
+David Engraf
+David Moore
+Davidlohr Bueso
+Federico Manzan
+Felipe Balbi
+Florian Albrechtskirchinger
+Francesco Montorsi
+Francisco Facioni
+Gaurav Gupta
+Graeme Gill
+Gustavo Zacarias
+Hans Ulrich Niedermann
+Hector Martin
+Hoi-Ho Chan
+Ilya Konstantinov
+James Hanko
+John Sheu
+Joshua Blake
+Justin Bischoff
+Karsten Koenig
+Konrad Rzepecki
+Kuangye Guo
+Lars Kanis
+Lars Wirzenius
+Luca Longinotti
+Marcus Meissner
+Markus Heidelberg
+Martin Ettl
+Martin Koegler
+Matthias Bolte
+Mike Frysinger
+Mikhail Gusarov
+Moritz Fischer
+Ларионов Даниил
+Nicholas Corgan
+Omri Iluz
+Orin Eman
+Paul Fertser
+Pekka Nikander
+Rob Walker
+Sean McBride
+Sebastian Pipping
+Simon Haggett
+Simon Newton
+Thomas Röfer
+Tim Hutt
+Tim Roberts
+Tobias Klauser
+Toby Peterson
+Tormod Volden
+Trygve Laugstøl
+Uri Lublin
+Vasily Khoruzhick
+Vegard Storheil Eriksen
+Venkatesh Shukla
+Vitali Lovich
+Xiaofan Chen
+Zoltán Kovács
+Роман Донченко
+parafin
+xantares

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/COPYING

@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
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vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/config.h

@@ -0,0 +1,3 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/hotplug.c

@@ -0,0 +1,350 @@
+/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */
+/*
+ * Hotplug functions for libusb
+ * Copyright © 2012-2013 Nathan Hjelm <hjelmn@mac.com>
+ * Copyright © 2012-2013 Peter Stuge <peter@stuge.se>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <assert.h>
+
+#include "libusbi.h"
+#include "hotplug.h"
+
+/**
+ * @defgroup libusb_hotplug Device hotplug event notification
+ * This page details how to use the libusb hotplug interface, where available.
+ *
+ * Be mindful that not all platforms currently implement hotplug notification and
+ * that you should first call on \ref libusb_has_capability() with parameter
+ * \ref LIBUSB_CAP_HAS_HOTPLUG to confirm that hotplug support is available.
+ *
+ * \page libusb_hotplug Device hotplug event notification
+ *
+ * \section hotplug_intro Introduction
+ *
+ * Version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102, has added support
+ * for hotplug events on <b>some</b> platforms (you should test if your platform
+ * supports hotplug notification by calling \ref libusb_has_capability() with
+ * parameter \ref LIBUSB_CAP_HAS_HOTPLUG). 
+ *
+ * This interface allows you to request notification for the arrival and departure
+ * of matching USB devices.
+ *
+ * To receive hotplug notification you register a callback by calling
+ * \ref libusb_hotplug_register_callback(). This function will optionally return
+ * a callback handle that can be passed to \ref libusb_hotplug_deregister_callback().
+ *
+ * A callback function must return an int (0 or 1) indicating whether the callback is
+ * expecting additional events. Returning 0 will rearm the callback and 1 will cause
+ * the callback to be deregistered. Note that when callbacks are called from
+ * libusb_hotplug_register_callback() because of the \ref LIBUSB_HOTPLUG_ENUMERATE
+ * flag, the callback return value is ignored, iow you cannot cause a callback
+ * to be deregistered by returning 1 when it is called from
+ * libusb_hotplug_register_callback().
+ *
+ * Callbacks for a particular context are automatically deregistered by libusb_exit().
+ *
+ * As of 1.0.16 there are two supported hotplug events:
+ *  - LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED: A device has arrived and is ready to use
+ *  - LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT: A device has left and is no longer available
+ *
+ * A hotplug event can listen for either or both of these events.
+ *
+ * Note: If you receive notification that a device has left and you have any
+ * a libusb_device_handles for the device it is up to you to call libusb_close()
+ * on each device handle to free up any remaining resources associated with the device.
+ * Once a device has left any libusb_device_handle associated with the device
+ * are invalid and will remain so even if the device comes back.
+ *
+ * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED event it is considered
+ * safe to call any libusb function that takes a libusb_device. It also safe to
+ * open a device and submit asynchronous transfers. However, most other functions
+ * that take a libusb_device_handle are <b>not</b> safe to call. Examples of such
+ * functions are any of the \ref libusb_syncio "synchronous API" functions or the blocking
+ * functions that retrieve various \ref libusb_desc "USB descriptors". These functions must
+ * be used outside of the context of the hotplug callback.
+ *
+ * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT event the only safe function
+ * is libusb_get_device_descriptor().
+ *
+ * The following code provides an example of the usage of the hotplug interface:
+\code
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <libusb.h>
+
+static int count = 0;
+
+int hotplug_callback(struct libusb_context *ctx, struct libusb_device *dev,
+                     libusb_hotplug_event event, void *user_data) {
+  static libusb_device_handle *dev_handle = NULL;
+  struct libusb_device_descriptor desc;
+  int rc;
+
+  (void)libusb_get_device_descriptor(dev, &desc);
+
+  if (LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED == event) {
+    rc = libusb_open(dev, &dev_handle);
+    if (LIBUSB_SUCCESS != rc) {
+      printf("Could not open USB device\n");
+    }
+  } else if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == event) {
+    if (dev_handle) {
+      libusb_close(dev_handle);
+      dev_handle = NULL;
+    }
+  } else {
+    printf("Unhandled event %d\n", event);
+  }
+  count++;
+
+  return 0;
+}
+
+int main (void) {
+  libusb_hotplug_callback_handle callback_handle;
+  int rc;
+
+  libusb_init(NULL);
+
+  rc = libusb_hotplug_register_callback(NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED |
+                                        LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, 0, 0x045a, 0x5005,
+                                        LIBUSB_HOTPLUG_MATCH_ANY, hotplug_callback, NULL,
+                                        &callback_handle);
+  if (LIBUSB_SUCCESS != rc) {
+    printf("Error creating a hotplug callback\n");
+    libusb_exit(NULL);
+    return EXIT_FAILURE;
+  }
+
+  while (count < 2) {
+    libusb_handle_events_completed(NULL, NULL);
+    nanosleep(&(struct timespec){0, 10000000UL}, NULL);
+  }
+
+  libusb_hotplug_deregister_callback(NULL, callback_handle);
+  libusb_exit(NULL);
+
+  return 0;
+}
+\endcode
+ */
+
+static int usbi_hotplug_match_cb (struct libusb_context *ctx,
+	struct libusb_device *dev, libusb_hotplug_event event,
+	struct libusb_hotplug_callback *hotplug_cb)
+{
+	/* Handle lazy deregistration of callback */
+	if (hotplug_cb->needs_free) {
+		/* Free callback */
+		return 1;
+	}
+
+	if (!(hotplug_cb->events & event)) {
+		return 0;
+	}
+
+	if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->vendor_id &&
+	    hotplug_cb->vendor_id != dev->device_descriptor.idVendor) {
+		return 0;
+	}
+
+	if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->product_id &&
+	    hotplug_cb->product_id != dev->device_descriptor.idProduct) {
+		return 0;
+	}
+
+	if (LIBUSB_HOTPLUG_MATCH_ANY != hotplug_cb->dev_class &&
+	    hotplug_cb->dev_class != dev->device_descriptor.bDeviceClass) {
+		return 0;
+	}
+
+	return hotplug_cb->cb (ctx, dev, event, hotplug_cb->user_data);
+}
+
+void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev,
+	libusb_hotplug_event event)
+{
+	struct libusb_hotplug_callback *hotplug_cb, *next;
+	int ret;
+
+	usbi_mutex_lock(&ctx->hotplug_cbs_lock);
+
+	list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list, struct libusb_hotplug_callback) {
+		usbi_mutex_unlock(&ctx->hotplug_cbs_lock);
+		ret = usbi_hotplug_match_cb (ctx, dev, event, hotplug_cb);
+		usbi_mutex_lock(&ctx->hotplug_cbs_lock);
+
+		if (ret) {
+			list_del(&hotplug_cb->list);
+			free(hotplug_cb);
+		}
+	}
+
+	usbi_mutex_unlock(&ctx->hotplug_cbs_lock);
+
+	/* the backend is expected to call the callback for each active transfer */
+}
+
+void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev,
+	libusb_hotplug_event event)
+{
+	int pending_events;
+	libusb_hotplug_message *message = calloc(1, sizeof(*message));
+
+	if (!message) {
+		usbi_err(ctx, "error allocating hotplug message");
+		return;
+	}
+
+	message->event = event;
+	message->device = dev;
+
+	/* Take the event data lock and add this message to the list.
+	 * Only signal an event if there are no prior pending events. */
+	usbi_mutex_lock(&ctx->event_data_lock);
+	pending_events = usbi_pending_events(ctx);
+	list_add_tail(&message->list, &ctx->hotplug_msgs);
+	if (!pending_events)
+		usbi_signal_event(ctx);
+	usbi_mutex_unlock(&ctx->event_data_lock);
+}
+
+int API_EXPORTED 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)
+{
+	libusb_hotplug_callback *new_callback;
+	static int handle_id = 1;
+
+	/* check for hotplug support */
+	if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) {
+		return LIBUSB_ERROR_NOT_SUPPORTED;
+	}
+
+	/* check for sane values */
+	if ((LIBUSB_HOTPLUG_MATCH_ANY != vendor_id && (~0xffff & vendor_id)) ||
+	    (LIBUSB_HOTPLUG_MATCH_ANY != product_id && (~0xffff & product_id)) ||
+	    (LIBUSB_HOTPLUG_MATCH_ANY != dev_class && (~0xff & dev_class)) ||
+	    !cb_fn) {
+		return LIBUSB_ERROR_INVALID_PARAM;
+	}
+
+	USBI_GET_CONTEXT(ctx);
+
+	new_callback = (libusb_hotplug_callback *)calloc(1, sizeof (*new_callback));
+	if (!new_callback) {
+		return LIBUSB_ERROR_NO_MEM;
+	}
+
+	new_callback->ctx = ctx;
+	new_callback->vendor_id = vendor_id;
+	new_callback->product_id = product_id;
+	new_callback->dev_class = dev_class;
+	new_callback->flags = flags;
+	new_callback->events = events;
+	new_callback->cb = cb_fn;
+	new_callback->user_data = user_data;
+	new_callback->needs_free = 0;
+
+	usbi_mutex_lock(&ctx->hotplug_cbs_lock);
+
+	/* protect the handle by the context hotplug lock. it doesn't matter if the same handle
+	 * is used for different contexts only that the handle is unique for this context */
+	new_callback->handle = handle_id++;
+
+	list_add(&new_callback->list, &ctx->hotplug_cbs);
+
+	usbi_mutex_unlock(&ctx->hotplug_cbs_lock);
+
+
+	if (flags & LIBUSB_HOTPLUG_ENUMERATE) {
+		int i, len;
+		struct libusb_device **devs;
+
+		len = (int) libusb_get_device_list(ctx, &devs);
+		if (len < 0) {
+			libusb_hotplug_deregister_callback(ctx,
+							new_callback->handle);
+			return len;
+		}
+
+		for (i = 0; i < len; i++) {
+			usbi_hotplug_match_cb(ctx, devs[i],
+					LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED,
+					new_callback);
+		}
+
+		libusb_free_device_list(devs, 1);
+	}
+
+
+	if (callback_handle)
+		*callback_handle = new_callback->handle;
+
+	return LIBUSB_SUCCESS;
+}
+
+void API_EXPORTED libusb_hotplug_deregister_callback (struct libusb_context *ctx,
+	libusb_hotplug_callback_handle callback_handle)
+{
+	struct libusb_hotplug_callback *hotplug_cb;
+
+	/* check for hotplug support */
+	if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) {
+		return;
+	}
+
+	USBI_GET_CONTEXT(ctx);
+
+	usbi_mutex_lock(&ctx->hotplug_cbs_lock);
+	list_for_each_entry(hotplug_cb, &ctx->hotplug_cbs, list,
+			    struct libusb_hotplug_callback) {
+		if (callback_handle == hotplug_cb->handle) {
+			/* Mark this callback for deregistration */
+			hotplug_cb->needs_free = 1;
+		}
+	}
+	usbi_mutex_unlock(&ctx->hotplug_cbs_lock);
+
+	usbi_hotplug_notification(ctx, NULL, 0);
+}
+
+void usbi_hotplug_deregister_all(struct libusb_context *ctx) {
+	struct libusb_hotplug_callback *hotplug_cb, *next;
+
+	usbi_mutex_lock(&ctx->hotplug_cbs_lock);
+	list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list,
+				 struct libusb_hotplug_callback) {
+		list_del(&hotplug_cb->list);
+		free(hotplug_cb);
+	}
+
+	usbi_mutex_unlock(&ctx->hotplug_cbs_lock);
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/hotplug.h

@@ -0,0 +1,90 @@
+/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */
+/*
+ * Hotplug support for libusb
+ * Copyright © 2012-2013 Nathan Hjelm <hjelmn@mac.com>
+ * Copyright © 2012-2013 Peter Stuge <peter@stuge.se>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if !defined(USBI_HOTPLUG_H)
+#define USBI_HOTPLUG_H
+
+#ifndef LIBUSBI_H
+#include "libusbi.h"
+#endif
+
+/** \ingroup hotplug
+ * The hotplug callback structure. The user populates this structure with
+ * libusb_hotplug_prepare_callback() and then calls libusb_hotplug_register_callback()
+ * to receive notification of hotplug events.
+ */
+struct libusb_hotplug_callback {
+	/** Context this callback is associated with */
+	struct libusb_context *ctx;
+
+	/** Vendor ID to match or LIBUSB_HOTPLUG_MATCH_ANY */
+	int vendor_id;
+
+	/** Product ID to match or LIBUSB_HOTPLUG_MATCH_ANY */
+	int product_id;
+
+	/** Device class to match or LIBUSB_HOTPLUG_MATCH_ANY */
+	int dev_class;
+
+	/** Hotplug callback flags */
+	libusb_hotplug_flag flags;
+
+	/** Event(s) that will trigger this callback */
+	libusb_hotplug_event events;
+
+	/** Callback function to invoke for matching event/device */
+	libusb_hotplug_callback_fn cb;
+
+	/** Handle for this callback (used to match on deregister) */
+	libusb_hotplug_callback_handle handle;
+
+	/** User data that will be passed to the callback function */
+	void *user_data;
+
+	/** Callback is marked for deletion */
+	int needs_free;
+
+	/** List this callback is registered in (ctx->hotplug_cbs) */
+	struct list_head list;
+};
+
+typedef struct libusb_hotplug_callback libusb_hotplug_callback;
+
+struct libusb_hotplug_message {
+	/** The hotplug event that occurred */
+	libusb_hotplug_event event;
+
+	/** The device for which this hotplug event occurred */
+	struct libusb_device *device;
+
+	/** List this message is contained in (ctx->hotplug_msgs) */
+	struct list_head list;
+};
+
+typedef struct libusb_hotplug_message libusb_hotplug_message;
+
+void usbi_hotplug_deregister_all(struct libusb_context *ctx);
+void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev,
+			libusb_hotplug_event event);
+void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev,
+			libusb_hotplug_event event);
+
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/darwin_usb.h

@@ -0,0 +1,164 @@
+/*
+ * darwin backend for libusb 1.0
+ * Copyright © 2008-2015 Nathan Hjelm <hjelmn@users.sourceforge.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if !defined(LIBUSB_DARWIN_H)
+#define LIBUSB_DARWIN_H
+
+#include "libusbi.h"
+
+#include <IOKit/IOTypes.h>
+#include <IOKit/IOCFBundle.h>
+#include <IOKit/usb/IOUSBLib.h>
+#include <IOKit/IOCFPlugIn.h>
+
+/* IOUSBInterfaceInferface */
+#if defined (kIOUSBInterfaceInterfaceID700) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9
+
+#define usb_interface_t IOUSBInterfaceInterface700
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID700
+#define InterfaceVersion 700
+
+#elif defined (kIOUSBInterfaceInterfaceID550) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9
+
+#define usb_interface_t IOUSBInterfaceInterface550
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID550
+#define InterfaceVersion 550
+
+#elif defined (kIOUSBInterfaceInterfaceID500)
+
+#define usb_interface_t IOUSBInterfaceInterface500
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID500
+#define InterfaceVersion 500
+
+#elif defined (kIOUSBInterfaceInterfaceID300)
+
+#define usb_interface_t IOUSBInterfaceInterface300
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID300
+#define InterfaceVersion 300
+
+#elif defined (kIOUSBInterfaceInterfaceID245)
+
+#define usb_interface_t IOUSBInterfaceInterface245
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID245
+#define InterfaceVersion 245
+
+#elif defined (kIOUSBInterfaceInterfaceID220)
+
+#define usb_interface_t IOUSBInterfaceInterface220
+#define InterfaceInterfaceID kIOUSBInterfaceInterfaceID220
+#define InterfaceVersion 220
+
+#else
+
+#error "IOUSBFamily is too old. Please upgrade your OS"
+
+#endif
+
+/* IOUSBDeviceInterface */
+#if defined (kIOUSBDeviceInterfaceID500) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_9
+
+#define usb_device_t    IOUSBDeviceInterface500
+#define DeviceInterfaceID kIOUSBDeviceInterfaceID500
+#define DeviceVersion 500
+
+#elif defined (kIOUSBDeviceInterfaceID320)
+
+#define usb_device_t    IOUSBDeviceInterface320
+#define DeviceInterfaceID kIOUSBDeviceInterfaceID320
+#define DeviceVersion 320
+
+#elif defined (kIOUSBDeviceInterfaceID300)
+
+#define usb_device_t    IOUSBDeviceInterface300
+#define DeviceInterfaceID kIOUSBDeviceInterfaceID300
+#define DeviceVersion 300
+
+#elif defined (kIOUSBDeviceInterfaceID245)
+
+#define usb_device_t    IOUSBDeviceInterface245
+#define DeviceInterfaceID kIOUSBDeviceInterfaceID245
+#define DeviceVersion 245
+
+#elif defined (kIOUSBDeviceInterfaceID220)
+#define usb_device_t    IOUSBDeviceInterface197
+#define DeviceInterfaceID kIOUSBDeviceInterfaceID197
+#define DeviceVersion 197
+
+#else
+
+#error "IOUSBFamily is too old. Please upgrade your OS"
+
+#endif
+
+#if !defined(IO_OBJECT_NULL)
+#define IO_OBJECT_NULL ((io_object_t) 0)
+#endif
+
+typedef IOCFPlugInInterface *io_cf_plugin_ref_t;
+typedef IONotificationPortRef io_notification_port_t;
+
+/* private structures */
+struct darwin_cached_device {
+  struct list_head      list;
+  IOUSBDeviceDescriptor dev_descriptor;
+  UInt32                location;
+  UInt64                parent_session;
+  UInt64                session;
+  UInt16                address;
+  char                  sys_path[21];
+  usb_device_t        **device;
+  int                   open_count;
+  UInt8                 first_config, active_config, port;  
+  int                   can_enumerate;
+  int                   refcount;
+};
+
+struct darwin_device_priv {
+  struct darwin_cached_device *dev;
+};
+
+struct darwin_device_handle_priv {
+  int                  is_open;
+  CFRunLoopSourceRef   cfSource;
+
+  struct darwin_interface {
+    usb_interface_t    **interface;
+    uint8_t              num_endpoints;
+    CFRunLoopSourceRef   cfSource;
+    uint64_t             frames[256];
+    uint8_t              endpoint_addrs[USB_MAXENDPOINTS];
+  } interfaces[USB_MAXINTERFACES];
+};
+
+struct darwin_transfer_priv {
+  /* Isoc */
+  IOUSBIsocFrame *isoc_framelist;
+  int num_iso_packets;
+
+  /* Control */
+  IOUSBDevRequestTO req;
+
+  /* Bulk */
+
+  /* Completion status */
+  IOReturn result;
+  UInt32 size;
+};
+
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/linux_netlink.c

@@ -0,0 +1,400 @@
+/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */
+/*
+ * Linux usbfs backend for libusb
+ * Copyright (C) 2007-2009 Daniel Drake <dsd@gentoo.org>
+ * Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
+ * Copyright (c) 2013 Nathan Hjelm <hjelmn@mac.com>
+ * Copyright (c) 2016 Chris Dickens <christopher.a.dickens@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#ifdef HAVE_ASM_TYPES_H
+#include <asm/types.h>
+#endif
+
+#include <sys/socket.h>
+#include <linux/netlink.h>
+
+#include "libusbi.h"
+#include "linux_usbfs.h"
+
+#define NL_GROUP_KERNEL 1
+
+static int linux_netlink_socket = -1;
+static int netlink_control_pipe[2] = { -1, -1 };
+static pthread_t libusb_linux_event_thread;
+
+static void *linux_netlink_event_thread_main(void *arg);
+
+static int set_fd_cloexec_nb(int fd)
+{
+	int flags;
+
+#if defined(FD_CLOEXEC)
+	flags = fcntl(fd, F_GETFD);
+	if (flags == -1) {
+		usbi_err(NULL, "failed to get netlink fd flags (%d)", errno);
+		return -1;
+	}
+
+	if (!(flags & FD_CLOEXEC)) {
+		if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
+			usbi_err(NULL, "failed to set netlink fd flags (%d)", errno);
+			return -1;
+		}
+	}
+#endif
+
+	flags = fcntl(fd, F_GETFL);
+	if (flags == -1) {
+		usbi_err(NULL, "failed to get netlink fd status flags (%d)", errno);
+		return -1;
+	}
+
+	if (!(flags & O_NONBLOCK)) {
+		if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
+			usbi_err(NULL, "failed to set netlink fd status flags (%d)", errno);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+int linux_netlink_start_event_monitor(void)
+{
+	struct sockaddr_nl sa_nl = { .nl_family = AF_NETLINK, .nl_groups = NL_GROUP_KERNEL };
+	int socktype = SOCK_RAW;
+	int opt = 1;
+	int ret;
+
+#if defined(SOCK_CLOEXEC)
+	socktype |= SOCK_CLOEXEC;
+#endif
+#if defined(SOCK_NONBLOCK)
+	socktype |= SOCK_NONBLOCK;
+#endif
+
+	linux_netlink_socket = socket(PF_NETLINK, socktype, NETLINK_KOBJECT_UEVENT);
+	if (linux_netlink_socket == -1 && errno == EINVAL) {
+		usbi_dbg("failed to create netlink socket of type %d, attempting SOCK_RAW", socktype);
+		linux_netlink_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_KOBJECT_UEVENT);
+	}
+
+	if (linux_netlink_socket == -1) {
+		usbi_err(NULL, "failed to create netlink socket (%d)", errno);
+		goto err;
+	}
+
+	ret = set_fd_cloexec_nb(linux_netlink_socket);
+	if (ret == -1)
+		goto err_close_socket;
+
+	ret = bind(linux_netlink_socket, (struct sockaddr *)&sa_nl, sizeof(sa_nl));
+	if (ret == -1) {
+		usbi_err(NULL, "failed to bind netlink socket (%d)", errno);
+		goto err_close_socket;
+	}
+
+	ret = setsockopt(linux_netlink_socket, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(opt));
+	if (ret == -1) {
+		usbi_err(NULL, "failed to set netlink socket SO_PASSCRED option (%d)", errno);
+		goto err_close_socket;
+	}
+
+	ret = usbi_pipe(netlink_control_pipe);
+	if (ret) {
+		usbi_err(NULL, "failed to create netlink control pipe");
+		goto err_close_socket;
+	}
+
+	ret = pthread_create(&libusb_linux_event_thread, NULL, linux_netlink_event_thread_main, NULL);
+	if (ret != 0) {
+		usbi_err(NULL, "failed to create netlink event thread (%d)", ret);
+		goto err_close_pipe;
+	}
+
+	return LIBUSB_SUCCESS;
+
+err_close_pipe:
+	close(netlink_control_pipe[0]);
+	close(netlink_control_pipe[1]);
+	netlink_control_pipe[0] = -1;
+	netlink_control_pipe[1] = -1;
+err_close_socket:
+	close(linux_netlink_socket);
+	linux_netlink_socket = -1;
+err:
+	return LIBUSB_ERROR_OTHER;
+}
+
+int linux_netlink_stop_event_monitor(void)
+{
+	char dummy = 1;
+	ssize_t r;
+
+	assert(linux_netlink_socket != -1);
+
+	/* Write some dummy data to the control pipe and
+	 * wait for the thread to exit */
+	r = usbi_write(netlink_control_pipe[1], &dummy, sizeof(dummy));
+	if (r <= 0)
+		usbi_warn(NULL, "netlink control pipe signal failed");
+
+	pthread_join(libusb_linux_event_thread, NULL);
+
+	close(linux_netlink_socket);
+	linux_netlink_socket = -1;
+
+	/* close and reset control pipe */
+	close(netlink_control_pipe[0]);
+	close(netlink_control_pipe[1]);
+	netlink_control_pipe[0] = -1;
+	netlink_control_pipe[1] = -1;
+
+	return LIBUSB_SUCCESS;
+}
+
+static const char *netlink_message_parse(const char *buffer, size_t len, const char *key)
+{
+	const char *end = buffer + len;
+	size_t keylen = strlen(key);
+
+	while (buffer < end && *buffer) {
+		if (strncmp(buffer, key, keylen) == 0 && buffer[keylen] == '=')
+			return buffer + keylen + 1;
+		buffer += strlen(buffer) + 1;
+	}
+
+	return NULL;
+}
+
+/* parse parts of netlink message common to both libudev and the kernel */
+static int linux_netlink_parse(const char *buffer, size_t len, int *detached,
+	const char **sys_name, uint8_t *busnum, uint8_t *devaddr)
+{
+	const char *tmp, *slash;
+
+	errno = 0;
+
+	*sys_name = NULL;
+	*detached = 0;
+	*busnum   = 0;
+	*devaddr  = 0;
+
+	tmp = netlink_message_parse(buffer, len, "ACTION");
+	if (!tmp) {
+		return -1;
+	} else if (strcmp(tmp, "remove") == 0) {
+		*detached = 1;
+	} else if (strcmp(tmp, "add") != 0) {
+		usbi_dbg("unknown device action %s", tmp);
+		return -1;
+	}
+
+	/* check that this is a usb message */
+	tmp = netlink_message_parse(buffer, len, "SUBSYSTEM");
+	if (!tmp || strcmp(tmp, "usb") != 0) {
+		/* not usb. ignore */
+		return -1;
+	}
+
+	/* check that this is an actual usb device */
+	tmp = netlink_message_parse(buffer, len, "DEVTYPE");
+	if (!tmp || strcmp(tmp, "usb_device") != 0) {
+		/* not usb. ignore */
+		return -1;
+	}
+
+	tmp = netlink_message_parse(buffer, len, "BUSNUM");
+	if (tmp) {
+		*busnum = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff);
+		if (errno) {
+			errno = 0;
+			return -1;
+		}
+
+		tmp = netlink_message_parse(buffer, len, "DEVNUM");
+		if (NULL == tmp)
+			return -1;
+
+		*devaddr = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff);
+		if (errno) {
+			errno = 0;
+			return -1;
+		}
+	} else {
+		/* no bus number. try "DEVICE" */
+		tmp = netlink_message_parse(buffer, len, "DEVICE");
+		if (!tmp) {
+			/* not usb. ignore */
+			return -1;
+		}
+
+		/* Parse a device path such as /dev/bus/usb/003/004 */
+		slash = strrchr(tmp, '/');
+		if (!slash)
+			return -1;
+
+		*busnum = (uint8_t)(strtoul(slash - 3, NULL, 10) & 0xff);
+		if (errno) {
+			errno = 0;
+			return -1;
+		}
+
+		*devaddr = (uint8_t)(strtoul(slash + 1, NULL, 10) & 0xff);
+		if (errno) {
+			errno = 0;
+			return -1;
+		}
+
+		return 0;
+	}
+
+	tmp = netlink_message_parse(buffer, len, "DEVPATH");
+	if (!tmp)
+		return -1;
+
+	slash = strrchr(tmp, '/');
+	if (slash)
+		*sys_name = slash + 1;
+
+	/* found a usb device */
+	return 0;
+}
+
+static int linux_netlink_read_message(void)
+{
+	char cred_buffer[CMSG_SPACE(sizeof(struct ucred))];
+	char msg_buffer[2048];
+	const char *sys_name = NULL;
+	uint8_t busnum, devaddr;
+	int detached, r;
+	ssize_t len;
+	struct cmsghdr *cmsg;
+	struct ucred *cred;
+	struct sockaddr_nl sa_nl;
+	struct iovec iov = { .iov_base = msg_buffer, .iov_len = sizeof(msg_buffer) };
+	struct msghdr msg = {
+		.msg_iov = &iov, .msg_iovlen = 1,
+		.msg_control = cred_buffer, .msg_controllen = sizeof(cred_buffer),
+		.msg_name = &sa_nl, .msg_namelen = sizeof(sa_nl)
+	};
+
+	/* read netlink message */
+	len = recvmsg(linux_netlink_socket, &msg, 0);
+	if (len == -1) {
+		if (errno != EAGAIN && errno != EINTR)
+			usbi_err(NULL, "error receiving message from netlink (%d)", errno);
+		return -1;
+	}
+
+	if (len < 32 || (msg.msg_flags & MSG_TRUNC)) {
+		usbi_err(NULL, "invalid netlink message length");
+		return -1;
+	}
+
+	if (sa_nl.nl_groups != NL_GROUP_KERNEL || sa_nl.nl_pid != 0) {
+		usbi_dbg("ignoring netlink message from unknown group/PID (%u/%u)",
+			 (unsigned int)sa_nl.nl_groups, (unsigned int)sa_nl.nl_pid);
+		return -1;
+	}
+
+	cmsg = CMSG_FIRSTHDR(&msg);
+	if (!cmsg || cmsg->cmsg_type != SCM_CREDENTIALS) {
+		usbi_dbg("ignoring netlink message with no sender credentials");
+		return -1;
+	}
+
+	cred = (struct ucred *)CMSG_DATA(cmsg);
+	if (cred->uid != 0) {
+		usbi_dbg("ignoring netlink message with non-zero sender UID %u", (unsigned int)cred->uid);
+		return -1;
+	}
+
+	r = linux_netlink_parse(msg_buffer, (size_t)len, &detached, &sys_name, &busnum, &devaddr);
+	if (r)
+		return r;
+
+	usbi_dbg("netlink hotplug found device busnum: %hhu, devaddr: %hhu, sys_name: %s, removed: %s",
+		 busnum, devaddr, sys_name, detached ? "yes" : "no");
+
+	/* signal device is available (or not) to all contexts */
+	if (detached)
+		linux_device_disconnected(busnum, devaddr);
+	else
+		linux_hotplug_enumerate(busnum, devaddr, sys_name);
+
+	return 0;
+}
+
+static void *linux_netlink_event_thread_main(void *arg)
+{
+	char dummy;
+	ssize_t r;
+	struct pollfd fds[] = {
+		{ .fd = netlink_control_pipe[0],
+		  .events = POLLIN },
+		{ .fd = linux_netlink_socket,
+		  .events = POLLIN },
+	};
+
+	UNUSED(arg);
+
+	usbi_dbg("netlink event thread entering");
+
+	while (poll(fds, 2, -1) >= 0) {
+		if (fds[0].revents & POLLIN) {
+			/* activity on control pipe, read the byte and exit */
+			r = usbi_read(netlink_control_pipe[0], &dummy, sizeof(dummy));
+			if (r <= 0)
+				usbi_warn(NULL, "netlink control pipe read failed");
+			break;
+		}
+		if (fds[1].revents & POLLIN) {
+			usbi_mutex_static_lock(&linux_hotplug_lock);
+			linux_netlink_read_message();
+			usbi_mutex_static_unlock(&linux_hotplug_lock);
+		}
+	}
+
+	usbi_dbg("netlink event thread exiting");
+
+	return NULL;
+}
+
+void linux_netlink_hotplug_poll(void)
+{
+	int r;
+
+	usbi_mutex_static_lock(&linux_hotplug_lock);
+	do {
+		r = linux_netlink_read_message();
+	} while (r == 0);
+	usbi_mutex_static_unlock(&linux_hotplug_lock);
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/linux_usbfs.h

@@ -0,0 +1,193 @@
+/*
+ * usbfs header structures
+ * Copyright © 2007 Daniel Drake <dsd@gentoo.org>
+ * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIBUSB_USBFS_H
+#define LIBUSB_USBFS_H
+
+#include <linux/types.h>
+
+#define SYSFS_DEVICE_PATH "/sys/bus/usb/devices"
+
+struct usbfs_ctrltransfer {
+	/* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */
+	uint8_t  bmRequestType;
+	uint8_t  bRequest;
+	uint16_t wValue;
+	uint16_t wIndex;
+	uint16_t wLength;
+
+	uint32_t timeout;	/* in milliseconds */
+
+	/* pointer to data */
+	void *data;
+};
+
+struct usbfs_bulktransfer {
+	/* keep in sync with usbdevice_fs.h:usbdevfs_bulktransfer */
+	unsigned int ep;
+	unsigned int len;
+	unsigned int timeout;	/* in milliseconds */
+
+	/* pointer to data */
+	void *data;
+};
+
+struct usbfs_setinterface {
+	/* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */
+	unsigned int interface;
+	unsigned int altsetting;
+};
+
+#define USBFS_MAXDRIVERNAME 255
+
+struct usbfs_getdriver {
+	unsigned int interface;
+	char driver[USBFS_MAXDRIVERNAME + 1];
+};
+
+#define USBFS_URB_SHORT_NOT_OK		0x01
+#define USBFS_URB_ISO_ASAP			0x02
+#define USBFS_URB_BULK_CONTINUATION	0x04
+#define USBFS_URB_QUEUE_BULK		0x10
+#define USBFS_URB_ZERO_PACKET		0x40
+
+enum usbfs_urb_type {
+	USBFS_URB_TYPE_ISO = 0,
+	USBFS_URB_TYPE_INTERRUPT = 1,
+	USBFS_URB_TYPE_CONTROL = 2,
+	USBFS_URB_TYPE_BULK = 3,
+};
+
+struct usbfs_iso_packet_desc {
+	unsigned int length;
+	unsigned int actual_length;
+	unsigned int status;
+};
+
+#define MAX_ISO_BUFFER_LENGTH		49152 * 128
+#define MAX_BULK_BUFFER_LENGTH		16384
+#define MAX_CTRL_BUFFER_LENGTH		4096
+
+struct usbfs_urb {
+	unsigned char type;
+	unsigned char endpoint;
+	int status;
+	unsigned int flags;
+	void *buffer;
+	int buffer_length;
+	int actual_length;
+	int start_frame;
+	union {
+		int number_of_packets;	/* Only used for isoc urbs */
+		unsigned int stream_id;	/* Only used with bulk streams */
+	};
+	int error_count;
+	unsigned int signr;
+	void *usercontext;
+	struct usbfs_iso_packet_desc iso_frame_desc[0];
+};
+
+struct usbfs_connectinfo {
+	unsigned int devnum;
+	unsigned char slow;
+};
+
+struct usbfs_ioctl {
+	int ifno;	/* interface 0..N ; negative numbers reserved */
+	int ioctl_code;	/* MUST encode size + direction of data so the
+			 * macros in <asm/ioctl.h> give correct values */
+	void *data;	/* param buffer (in, or out) */
+};
+
+struct usbfs_hub_portinfo {
+	unsigned char numports;
+	unsigned char port[127];	/* port to device num mapping */
+};
+
+#define USBFS_CAP_ZERO_PACKET		0x01
+#define USBFS_CAP_BULK_CONTINUATION	0x02
+#define USBFS_CAP_NO_PACKET_SIZE_LIM	0x04
+#define USBFS_CAP_BULK_SCATTER_GATHER	0x08
+#define USBFS_CAP_REAP_AFTER_DISCONNECT	0x10
+
+#define USBFS_DISCONNECT_CLAIM_IF_DRIVER	0x01
+#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER	0x02
+
+struct usbfs_disconnect_claim {
+	unsigned int interface;
+	unsigned int flags;
+	char driver[USBFS_MAXDRIVERNAME + 1];
+};
+
+struct usbfs_streams {
+	unsigned int num_streams; /* Not used by USBDEVFS_FREE_STREAMS */
+	unsigned int num_eps;
+	unsigned char eps[0];
+};
+
+#define IOCTL_USBFS_CONTROL	_IOWR('U', 0, struct usbfs_ctrltransfer)
+#define IOCTL_USBFS_BULK		_IOWR('U', 2, struct usbfs_bulktransfer)
+#define IOCTL_USBFS_RESETEP	_IOR('U', 3, unsigned int)
+#define IOCTL_USBFS_SETINTF	_IOR('U', 4, struct usbfs_setinterface)
+#define IOCTL_USBFS_SETCONFIG	_IOR('U', 5, unsigned int)
+#define IOCTL_USBFS_GETDRIVER	_IOW('U', 8, struct usbfs_getdriver)
+#define IOCTL_USBFS_SUBMITURB	_IOR('U', 10, struct usbfs_urb)
+#define IOCTL_USBFS_DISCARDURB	_IO('U', 11)
+#define IOCTL_USBFS_REAPURB	_IOW('U', 12, void *)
+#define IOCTL_USBFS_REAPURBNDELAY	_IOW('U', 13, void *)
+#define IOCTL_USBFS_CLAIMINTF	_IOR('U', 15, unsigned int)
+#define IOCTL_USBFS_RELEASEINTF	_IOR('U', 16, unsigned int)
+#define IOCTL_USBFS_CONNECTINFO	_IOW('U', 17, struct usbfs_connectinfo)
+#define IOCTL_USBFS_IOCTL         _IOWR('U', 18, struct usbfs_ioctl)
+#define IOCTL_USBFS_HUB_PORTINFO	_IOR('U', 19, struct usbfs_hub_portinfo)
+#define IOCTL_USBFS_RESET		_IO('U', 20)
+#define IOCTL_USBFS_CLEAR_HALT	_IOR('U', 21, unsigned int)
+#define IOCTL_USBFS_DISCONNECT	_IO('U', 22)
+#define IOCTL_USBFS_CONNECT	_IO('U', 23)
+#define IOCTL_USBFS_CLAIM_PORT	_IOR('U', 24, unsigned int)
+#define IOCTL_USBFS_RELEASE_PORT	_IOR('U', 25, unsigned int)
+#define IOCTL_USBFS_GET_CAPABILITIES	_IOR('U', 26, __u32)
+#define IOCTL_USBFS_DISCONNECT_CLAIM	_IOR('U', 27, struct usbfs_disconnect_claim)
+#define IOCTL_USBFS_ALLOC_STREAMS	_IOR('U', 28, struct usbfs_streams)
+#define IOCTL_USBFS_FREE_STREAMS	_IOR('U', 29, struct usbfs_streams)
+
+extern usbi_mutex_static_t linux_hotplug_lock;
+
+#if defined(HAVE_LIBUDEV)
+int linux_udev_start_event_monitor(void);
+int linux_udev_stop_event_monitor(void);
+int linux_udev_scan_devices(struct libusb_context *ctx);
+void linux_udev_hotplug_poll(void);
+#else
+int linux_netlink_start_event_monitor(void);
+int linux_netlink_stop_event_monitor(void);
+void linux_netlink_hotplug_poll(void);
+#endif
+
+void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name);
+void linux_device_disconnected(uint8_t busnum, uint8_t devaddr);
+
+int linux_get_device_address (struct libusb_context *ctx, int detached,
+	uint8_t *busnum, uint8_t *devaddr, const char *dev_node,
+	const char *sys_name);
+int linux_enumerate_device(struct libusb_context *ctx,
+	uint8_t busnum, uint8_t devaddr, const char *sysfs_dir);
+
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/poll_posix.c

@@ -0,0 +1,53 @@
+/*
+ * poll_posix: poll compatibility wrapper for POSIX systems
+ * Copyright © 2013 RealVNC Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <config.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include "libusbi.h"
+
+int usbi_pipe(int pipefd[2])
+{
+	int ret = pipe(pipefd);
+	if (ret != 0) {
+		return ret;
+	}
+	ret = fcntl(pipefd[1], F_GETFL);
+	if (ret == -1) {
+		usbi_dbg("Failed to get pipe fd flags: %d", errno);
+		goto err_close_pipe;
+	}
+	ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK);
+	if (ret != 0) {
+		usbi_dbg("Failed to set non-blocking on new pipe: %d", errno);
+		goto err_close_pipe;
+	}
+
+	return 0;
+
+err_close_pipe:
+	usbi_close(pipefd[0]);
+	usbi_close(pipefd[1]);
+	return ret;
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/poll_posix.h

@@ -0,0 +1,11 @@
+#ifndef LIBUSB_POLL_POSIX_H
+#define LIBUSB_POLL_POSIX_H
+
+#define usbi_write write
+#define usbi_read read
+#define usbi_close close
+#define usbi_poll poll
+
+int usbi_pipe(int pipefd[2]);
+
+#endif /* LIBUSB_POLL_POSIX_H */

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/poll_windows.c

@@ -0,0 +1,728 @@
+/*
+ * poll_windows: poll compatibility wrapper for Windows
+ * Copyright © 2012-2013 RealVNC Ltd.
+ * Copyright © 2009-2010 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of poll implementation from libusb-win32, by Stephan Meyer et al.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+/*
+ * poll() and pipe() Windows compatibility layer for libusb 1.0
+ *
+ * The way this layer works is by using OVERLAPPED with async I/O transfers, as
+ * OVERLAPPED have an associated event which is flagged for I/O completion.
+ *
+ * For USB pollable async I/O, you would typically:
+ * - obtain a Windows HANDLE to a file or device that has been opened in
+ *   OVERLAPPED mode
+ * - call usbi_create_fd with this handle to obtain a custom fd.
+ *   Note that if you need simultaneous R/W access, you need to call create_fd
+ *   twice, once in RW_READ and once in RW_WRITE mode to obtain 2 separate
+ *   pollable fds
+ * - leave the core functions call the poll routine and flag POLLIN/POLLOUT
+ *
+ * The pipe pollable synchronous I/O works using the overlapped event associated
+ * with a fake pipe. The read/write functions are only meant to be used in that
+ * context.
+ */
+#include <config.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "libusbi.h"
+
+// Uncomment to debug the polling layer
+//#define DEBUG_POLL_WINDOWS
+#if defined(DEBUG_POLL_WINDOWS)
+#define poll_dbg usbi_dbg
+#else
+// MSVC++ < 2005 cannot use a variadic argument and non MSVC
+// compilers produce warnings if parenthesis are omitted.
+#if defined(_MSC_VER) && (_MSC_VER < 1400)
+#define poll_dbg
+#else
+#define poll_dbg(...)
+#endif
+#endif
+
+#if defined(_PREFAST_)
+#pragma warning(disable:28719)
+#endif
+
+#define CHECK_INIT_POLLING do {if(!is_polling_set) init_polling();} while(0)
+
+// public fd data
+const struct winfd INVALID_WINFD = {-1, INVALID_HANDLE_VALUE, NULL, NULL, NULL, RW_NONE};
+struct winfd poll_fd[MAX_FDS];
+// internal fd data
+struct {
+	CRITICAL_SECTION mutex; // lock for fds
+	// Additional variables for XP CancelIoEx partial emulation
+	HANDLE original_handle;
+	DWORD thread_id;
+} _poll_fd[MAX_FDS];
+
+// globals
+BOOLEAN is_polling_set = FALSE;
+LONG pipe_number = 0;
+static volatile LONG compat_spinlock = 0;
+
+#if !defined(_WIN32_WCE)
+// CancelIoEx, available on Vista and later only, provides the ability to cancel
+// a single transfer (OVERLAPPED) when used. As it may not be part of any of the
+// platform headers, we hook into the Kernel32 system DLL directly to seek it.
+static BOOL (__stdcall *pCancelIoEx)(HANDLE, LPOVERLAPPED) = NULL;
+#define Use_Duplicate_Handles (pCancelIoEx == NULL)
+
+static inline void setup_cancel_io(void)
+{
+	HMODULE hKernel32 = GetModuleHandleA("KERNEL32");
+	if (hKernel32 != NULL) {
+		pCancelIoEx = (BOOL (__stdcall *)(HANDLE,LPOVERLAPPED))
+			GetProcAddress(hKernel32, "CancelIoEx");
+	}
+	usbi_dbg("Will use CancelIo%s for I/O cancellation",
+		Use_Duplicate_Handles?"":"Ex");
+}
+
+static inline BOOL cancel_io(int _index)
+{
+	if ((_index < 0) || (_index >= MAX_FDS)) {
+		return FALSE;
+	}
+
+	if ( (poll_fd[_index].fd < 0) || (poll_fd[_index].handle == INVALID_HANDLE_VALUE)
+	  || (poll_fd[_index].handle == 0) || (poll_fd[_index].overlapped == NULL) ) {
+		return TRUE;
+	}
+	if (poll_fd[_index].itransfer && poll_fd[_index].cancel_fn) {
+		// Cancel outstanding transfer via the specific callback
+		(*poll_fd[_index].cancel_fn)(poll_fd[_index].itransfer);
+		return TRUE;
+	}
+	if (pCancelIoEx != NULL) {
+		return (*pCancelIoEx)(poll_fd[_index].handle, poll_fd[_index].overlapped);
+	}
+	if (_poll_fd[_index].thread_id == GetCurrentThreadId()) {
+		return CancelIo(poll_fd[_index].handle);
+	}
+	usbi_warn(NULL, "Unable to cancel I/O that was started from another thread");
+	return FALSE;
+}
+#else
+#define Use_Duplicate_Handles FALSE
+
+static __inline void setup_cancel_io()
+{
+	// No setup needed on WinCE
+}
+
+static __inline BOOL cancel_io(int _index)
+{
+	if ((_index < 0) || (_index >= MAX_FDS)) {
+		return FALSE;
+	}
+	if ( (poll_fd[_index].fd < 0) || (poll_fd[_index].handle == INVALID_HANDLE_VALUE)
+	  || (poll_fd[_index].handle == 0) || (poll_fd[_index].overlapped == NULL) ) {
+		return TRUE;
+	}
+	if (poll_fd[_index].itransfer && poll_fd[_index].cancel_fn) {
+		// Cancel outstanding transfer via the specific callback
+		(*poll_fd[_index].cancel_fn)(poll_fd[_index].itransfer);
+	}
+	return TRUE;
+}
+#endif
+
+// Init
+void init_polling(void)
+{
+	int i;
+
+	while (InterlockedExchange((LONG *)&compat_spinlock, 1) == 1) {
+		SleepEx(0, TRUE);
+	}
+	if (!is_polling_set) {
+		setup_cancel_io();
+		for (i=0; i<MAX_FDS; i++) {
+			poll_fd[i] = INVALID_WINFD;
+			_poll_fd[i].original_handle = INVALID_HANDLE_VALUE;
+			_poll_fd[i].thread_id = 0;
+			InitializeCriticalSection(&_poll_fd[i].mutex);
+		}
+		is_polling_set = TRUE;
+	}
+	InterlockedExchange((LONG *)&compat_spinlock, 0);
+}
+
+// Internal function to retrieve the table index (and lock the fd mutex)
+static int _fd_to_index_and_lock(int fd)
+{
+	int i;
+
+	if (fd < 0)
+		return -1;
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].fd == fd) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have changed before we got to critical
+			if (poll_fd[i].fd != fd) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+			return i;
+		}
+	}
+	return -1;
+}
+
+static OVERLAPPED *create_overlapped(void)
+{
+	OVERLAPPED *overlapped = (OVERLAPPED*) calloc(1, sizeof(OVERLAPPED));
+	if (overlapped == NULL) {
+		return NULL;
+	}
+	overlapped->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+	if(overlapped->hEvent == NULL) {
+		free (overlapped);
+		return NULL;
+	}
+	return overlapped;
+}
+
+static void free_overlapped(OVERLAPPED *overlapped)
+{
+	if (overlapped == NULL)
+		return;
+
+	if ( (overlapped->hEvent != 0)
+	  && (overlapped->hEvent != INVALID_HANDLE_VALUE) ) {
+		CloseHandle(overlapped->hEvent);
+	}
+	free(overlapped);
+}
+
+void exit_polling(void)
+{
+	int i;
+
+	while (InterlockedExchange((LONG *)&compat_spinlock, 1) == 1) {
+		SleepEx(0, TRUE);
+	}
+	if (is_polling_set) {
+		is_polling_set = FALSE;
+
+		for (i=0; i<MAX_FDS; i++) {
+			// Cancel any async I/O (handle can be invalid)
+			cancel_io(i);
+			// If anything was pending on that I/O, it should be
+			// terminating, and we should be able to access the fd
+			// mutex lock before too long
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			free_overlapped(poll_fd[i].overlapped);
+			if (Use_Duplicate_Handles) {
+				// Close duplicate handle
+				if (_poll_fd[i].original_handle != INVALID_HANDLE_VALUE) {
+					CloseHandle(poll_fd[i].handle);
+				}
+			}
+			poll_fd[i] = INVALID_WINFD;
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			DeleteCriticalSection(&_poll_fd[i].mutex);
+		}
+	}
+	InterlockedExchange((LONG *)&compat_spinlock, 0);
+}
+
+/*
+ * Create a fake pipe.
+ * As libusb only uses pipes for signaling, all we need from a pipe is an
+ * event. To that extent, we create a single wfd and overlapped as a means
+ * to access that event.
+ */
+int usbi_pipe(int filedes[2])
+{
+	int i;
+	OVERLAPPED* overlapped;
+
+	CHECK_INIT_POLLING;
+
+	overlapped = create_overlapped();
+
+	if (overlapped == NULL) {
+		return -1;
+	}
+	// The overlapped must have status pending for signaling to work in poll
+	overlapped->Internal = STATUS_PENDING;
+	overlapped->InternalHigh = 0;
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].fd < 0) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have been allocated before we got to critical
+			if (poll_fd[i].fd >= 0) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+
+			// Use index as the unique fd number
+			poll_fd[i].fd = i;
+			// Read end of the "pipe"
+			filedes[0] = poll_fd[i].fd;
+			// We can use the same handle for both ends
+			filedes[1] = filedes[0];
+
+			poll_fd[i].handle = DUMMY_HANDLE;
+			poll_fd[i].overlapped = overlapped;
+			// There's no polling on the write end, so we just use READ for our needs
+			poll_fd[i].rw = RW_READ;
+			_poll_fd[i].original_handle = INVALID_HANDLE_VALUE;
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			return 0;
+		}
+	}
+	free_overlapped(overlapped);
+	return -1;
+}
+
+/*
+ * Create both an fd and an OVERLAPPED from an open Windows handle, so that
+ * it can be used with our polling function
+ * The handle MUST support overlapped transfers (usually requires CreateFile
+ * with FILE_FLAG_OVERLAPPED)
+ * Return a pollable file descriptor struct, or INVALID_WINFD on error
+ *
+ * Note that the fd returned by this function is a per-transfer fd, rather
+ * than a per-session fd and cannot be used for anything else but our
+ * custom functions (the fd itself points to the NUL: device)
+ * if you plan to do R/W on the same handle, you MUST create 2 fds: one for
+ * read and one for write. Using a single R/W fd is unsupported and will
+ * produce unexpected results
+ */
+struct winfd usbi_create_fd(HANDLE handle, int access_mode, struct usbi_transfer *itransfer, cancel_transfer *cancel_fn)
+{
+	int i;
+	struct winfd wfd = INVALID_WINFD;
+	OVERLAPPED* overlapped = NULL;
+
+	CHECK_INIT_POLLING;
+
+	if ((handle == 0) || (handle == INVALID_HANDLE_VALUE)) {
+		return INVALID_WINFD;
+	}
+
+	wfd.itransfer = itransfer;
+	wfd.cancel_fn = cancel_fn;
+
+	if ((access_mode != RW_READ) && (access_mode != RW_WRITE)) {
+		usbi_warn(NULL, "only one of RW_READ or RW_WRITE are supported. "
+			"If you want to poll for R/W simultaneously, create multiple fds from the same handle.");
+		return INVALID_WINFD;
+	}
+	if (access_mode == RW_READ) {
+		wfd.rw = RW_READ;
+	} else {
+		wfd.rw = RW_WRITE;
+	}
+
+	overlapped = create_overlapped();
+	if(overlapped == NULL) {
+		return INVALID_WINFD;
+	}
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].fd < 0) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have been removed before we got to critical
+			if (poll_fd[i].fd >= 0) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+			// Use index as the unique fd number
+			wfd.fd = i;
+			// Attempt to emulate some of the CancelIoEx behaviour on platforms
+			// that don't have it
+			if (Use_Duplicate_Handles) {
+				_poll_fd[i].thread_id = GetCurrentThreadId();
+				if (!DuplicateHandle(GetCurrentProcess(), handle, GetCurrentProcess(),
+					&wfd.handle, 0, TRUE, DUPLICATE_SAME_ACCESS)) {
+					usbi_dbg("could not duplicate handle for CancelIo - using original one");
+					wfd.handle = handle;
+					// Make sure we won't close the original handle on fd deletion then
+					_poll_fd[i].original_handle = INVALID_HANDLE_VALUE;
+				} else {
+					_poll_fd[i].original_handle = handle;
+				}
+			} else {
+				wfd.handle = handle;
+			}
+			wfd.overlapped = overlapped;
+			memcpy(&poll_fd[i], &wfd, sizeof(struct winfd));
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			return wfd;
+		}
+	}
+	free_overlapped(overlapped);
+	return INVALID_WINFD;
+}
+
+static void _free_index(int _index)
+{
+	// Cancel any async IO (Don't care about the validity of our handles for this)
+	cancel_io(_index);
+	// close the duplicate handle (if we have an actual duplicate)
+	if (Use_Duplicate_Handles) {
+		if (_poll_fd[_index].original_handle != INVALID_HANDLE_VALUE) {
+			CloseHandle(poll_fd[_index].handle);
+		}
+		_poll_fd[_index].original_handle = INVALID_HANDLE_VALUE;
+		_poll_fd[_index].thread_id = 0;
+	}
+	free_overlapped(poll_fd[_index].overlapped);
+	poll_fd[_index] = INVALID_WINFD;
+}
+
+/*
+ * Release a pollable file descriptor.
+ *
+ * Note that the associated Windows handle is not closed by this call
+ */
+void usbi_free_fd(struct winfd *wfd)
+{
+	int _index;
+
+	CHECK_INIT_POLLING;
+
+	_index = _fd_to_index_and_lock(wfd->fd);
+	if (_index < 0) {
+		return;
+	}
+	_free_index(_index);
+	*wfd = INVALID_WINFD;
+	LeaveCriticalSection(&_poll_fd[_index].mutex);
+}
+
+/*
+ * The functions below perform various conversions between fd, handle and OVERLAPPED
+ */
+struct winfd fd_to_winfd(int fd)
+{
+	int i;
+	struct winfd wfd;
+
+	CHECK_INIT_POLLING;
+
+	if (fd < 0)
+		return INVALID_WINFD;
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].fd == fd) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have been deleted before we got to critical
+			if (poll_fd[i].fd != fd) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+			memcpy(&wfd, &poll_fd[i], sizeof(struct winfd));
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			return wfd;
+		}
+	}
+	return INVALID_WINFD;
+}
+
+struct winfd handle_to_winfd(HANDLE handle)
+{
+	int i;
+	struct winfd wfd;
+
+	CHECK_INIT_POLLING;
+
+	if ((handle == 0) || (handle == INVALID_HANDLE_VALUE))
+		return INVALID_WINFD;
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].handle == handle) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have been deleted before we got to critical
+			if (poll_fd[i].handle != handle) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+			memcpy(&wfd, &poll_fd[i], sizeof(struct winfd));
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			return wfd;
+		}
+	}
+	return INVALID_WINFD;
+}
+
+struct winfd overlapped_to_winfd(OVERLAPPED* overlapped)
+{
+	int i;
+	struct winfd wfd;
+
+	CHECK_INIT_POLLING;
+
+	if (overlapped == NULL)
+		return INVALID_WINFD;
+
+	for (i=0; i<MAX_FDS; i++) {
+		if (poll_fd[i].overlapped == overlapped) {
+			EnterCriticalSection(&_poll_fd[i].mutex);
+			// fd might have been deleted before we got to critical
+			if (poll_fd[i].overlapped != overlapped) {
+				LeaveCriticalSection(&_poll_fd[i].mutex);
+				continue;
+			}
+			memcpy(&wfd, &poll_fd[i], sizeof(struct winfd));
+			LeaveCriticalSection(&_poll_fd[i].mutex);
+			return wfd;
+		}
+	}
+	return INVALID_WINFD;
+}
+
+/*
+ * POSIX poll equivalent, using Windows OVERLAPPED
+ * Currently, this function only accepts one of POLLIN or POLLOUT per fd
+ * (but you can create multiple fds from the same handle for read and write)
+ */
+int usbi_poll(struct pollfd *fds, unsigned int nfds, int timeout)
+{
+	unsigned i;
+	int _index, object_index, triggered;
+	HANDLE *handles_to_wait_on;
+	int *handle_to_index;
+	DWORD nb_handles_to_wait_on = 0;
+	DWORD ret;
+
+	CHECK_INIT_POLLING;
+
+	triggered = 0;
+	handles_to_wait_on = (HANDLE*) calloc(nfds+1, sizeof(HANDLE));	// +1 for fd_update
+	handle_to_index = (int*) calloc(nfds, sizeof(int));
+	if ((handles_to_wait_on == NULL) || (handle_to_index == NULL)) {
+		errno = ENOMEM;
+		triggered = -1;
+		goto poll_exit;
+	}
+
+	for (i = 0; i < nfds; ++i) {
+		fds[i].revents = 0;
+
+		// Only one of POLLIN or POLLOUT can be selected with this version of poll (not both)
+		if ((fds[i].events & ~POLLIN) && (!(fds[i].events & POLLOUT))) {
+			fds[i].revents |= POLLERR;
+			errno = EACCES;
+			usbi_warn(NULL, "unsupported set of events");
+			triggered = -1;
+			goto poll_exit;
+		}
+
+		_index = _fd_to_index_and_lock(fds[i].fd);
+		poll_dbg("fd[%d]=%d: (overlapped=%p) got events %04X", i, poll_fd[_index].fd, poll_fd[_index].overlapped, fds[i].events);
+
+		if ( (_index < 0) || (poll_fd[_index].handle == INVALID_HANDLE_VALUE)
+		  || (poll_fd[_index].handle == 0) || (poll_fd[_index].overlapped == NULL)) {
+			fds[i].revents |= POLLNVAL | POLLERR;
+			errno = EBADF;
+			if (_index >= 0) {
+				LeaveCriticalSection(&_poll_fd[_index].mutex);
+			}
+			usbi_warn(NULL, "invalid fd");
+			triggered = -1;
+			goto poll_exit;
+		}
+
+		// IN or OUT must match our fd direction
+		if ((fds[i].events & POLLIN) && (poll_fd[_index].rw != RW_READ)) {
+			fds[i].revents |= POLLNVAL | POLLERR;
+			errno = EBADF;
+			usbi_warn(NULL, "attempted POLLIN on fd without READ access");
+			LeaveCriticalSection(&_poll_fd[_index].mutex);
+			triggered = -1;
+			goto poll_exit;
+		}
+
+		if ((fds[i].events & POLLOUT) && (poll_fd[_index].rw != RW_WRITE)) {
+			fds[i].revents |= POLLNVAL | POLLERR;
+			errno = EBADF;
+			usbi_warn(NULL, "attempted POLLOUT on fd without WRITE access");
+			LeaveCriticalSection(&_poll_fd[_index].mutex);
+			triggered = -1;
+			goto poll_exit;
+		}
+
+		// The following macro only works if overlapped I/O was reported pending
+		if ( (HasOverlappedIoCompleted(poll_fd[_index].overlapped))
+		  || (HasOverlappedIoCompletedSync(poll_fd[_index].overlapped)) ) {
+			poll_dbg("  completed");
+			// checks above should ensure this works:
+			fds[i].revents = fds[i].events;
+			triggered++;
+		} else {
+			handles_to_wait_on[nb_handles_to_wait_on] = poll_fd[_index].overlapped->hEvent;
+			handle_to_index[nb_handles_to_wait_on] = i;
+			nb_handles_to_wait_on++;
+		}
+		LeaveCriticalSection(&_poll_fd[_index].mutex);
+	}
+
+	// If nothing was triggered, wait on all fds that require it
+	if ((timeout != 0) && (triggered == 0) && (nb_handles_to_wait_on != 0)) {
+		if (timeout < 0) {
+			poll_dbg("starting infinite wait for %u handles...", (unsigned int)nb_handles_to_wait_on);
+		} else {
+			poll_dbg("starting %d ms wait for %u handles...", timeout, (unsigned int)nb_handles_to_wait_on);
+		}
+		ret = WaitForMultipleObjects(nb_handles_to_wait_on, handles_to_wait_on,
+			FALSE, (timeout<0)?INFINITE:(DWORD)timeout);
+		object_index = ret-WAIT_OBJECT_0;
+		if ((object_index >= 0) && ((DWORD)object_index < nb_handles_to_wait_on)) {
+			poll_dbg("  completed after wait");
+			i = handle_to_index[object_index];
+			_index = _fd_to_index_and_lock(fds[i].fd);
+			fds[i].revents = fds[i].events;
+			triggered++;
+			if (_index >= 0) {
+				LeaveCriticalSection(&_poll_fd[_index].mutex);
+			}
+		} else if (ret == WAIT_TIMEOUT) {
+			poll_dbg("  timed out");
+			triggered = 0;	// 0 = timeout
+		} else {
+			errno = EIO;
+			triggered = -1;	// error
+		}
+	}
+
+poll_exit:
+	if (handles_to_wait_on != NULL) {
+		free(handles_to_wait_on);
+	}
+	if (handle_to_index != NULL) {
+		free(handle_to_index);
+	}
+	return triggered;
+}
+
+/*
+ * close a fake pipe fd
+ */
+int usbi_close(int fd)
+{
+	int _index;
+	int r = -1;
+
+	CHECK_INIT_POLLING;
+
+	_index = _fd_to_index_and_lock(fd);
+
+	if (_index < 0) {
+		errno = EBADF;
+	} else {
+		free_overlapped(poll_fd[_index].overlapped);
+		poll_fd[_index] = INVALID_WINFD;
+		LeaveCriticalSection(&_poll_fd[_index].mutex);
+	}
+	return r;
+}
+
+/*
+ * synchronous write for fake "pipe" signaling
+ */
+ssize_t usbi_write(int fd, const void *buf, size_t count)
+{
+	int _index;
+	UNUSED(buf);
+
+	CHECK_INIT_POLLING;
+
+	if (count != sizeof(unsigned char)) {
+		usbi_err(NULL, "this function should only used for signaling");
+		return -1;
+	}
+
+	_index = _fd_to_index_and_lock(fd);
+
+	if ( (_index < 0) || (poll_fd[_index].overlapped == NULL) ) {
+		errno = EBADF;
+		if (_index >= 0) {
+			LeaveCriticalSection(&_poll_fd[_index].mutex);
+		}
+		return -1;
+	}
+
+	poll_dbg("set pipe event (fd = %d, thread = %08X)", _index, (unsigned int)GetCurrentThreadId());
+	SetEvent(poll_fd[_index].overlapped->hEvent);
+	poll_fd[_index].overlapped->Internal = STATUS_WAIT_0;
+	// If two threads write on the pipe at the same time, we need to
+	// process two separate reads => use the overlapped as a counter
+	poll_fd[_index].overlapped->InternalHigh++;
+
+	LeaveCriticalSection(&_poll_fd[_index].mutex);
+	return sizeof(unsigned char);
+}
+
+/*
+ * synchronous read for fake "pipe" signaling
+ */
+ssize_t usbi_read(int fd, void *buf, size_t count)
+{
+	int _index;
+	ssize_t r = -1;
+	UNUSED(buf);
+
+	CHECK_INIT_POLLING;
+
+	if (count != sizeof(unsigned char)) {
+		usbi_err(NULL, "this function should only used for signaling");
+		return -1;
+	}
+
+	_index = _fd_to_index_and_lock(fd);
+
+	if (_index < 0) {
+		errno = EBADF;
+		return -1;
+	}
+
+	if (WaitForSingleObject(poll_fd[_index].overlapped->hEvent, INFINITE) != WAIT_OBJECT_0) {
+		usbi_warn(NULL, "waiting for event failed: %u", (unsigned int)GetLastError());
+		errno = EIO;
+		goto out;
+	}
+
+	poll_dbg("clr pipe event (fd = %d, thread = %08X)", _index, (unsigned int)GetCurrentThreadId());
+	poll_fd[_index].overlapped->InternalHigh--;
+	// Don't reset unless we don't have any more events to process
+	if (poll_fd[_index].overlapped->InternalHigh <= 0) {
+		ResetEvent(poll_fd[_index].overlapped->hEvent);
+		poll_fd[_index].overlapped->Internal = STATUS_PENDING;
+	}
+
+	r = sizeof(unsigned char);
+
+out:
+	LeaveCriticalSection(&_poll_fd[_index].mutex);
+	return r;
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/poll_windows.h

@@ -0,0 +1,131 @@
+/*
+ * Windows compat: POSIX compatibility wrapper
+ * Copyright © 2012-2013 RealVNC Ltd.
+ * Copyright © 2009-2010 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of poll implementation from libusb-win32, by Stephan Meyer et al.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#pragma once
+
+#if defined(_MSC_VER)
+// disable /W4 MSVC warnings that are benign
+#pragma warning(disable:4127) // conditional expression is constant
+#endif
+
+// Handle synchronous completion through the overlapped structure
+#if !defined(STATUS_REPARSE)	// reuse the REPARSE status code
+#define STATUS_REPARSE ((LONG)0x00000104L)
+#endif
+#define STATUS_COMPLETED_SYNCHRONOUSLY	STATUS_REPARSE
+#if defined(_WIN32_WCE)
+// WinCE doesn't have a HasOverlappedIoCompleted() macro, so attempt to emulate it
+#define HasOverlappedIoCompleted(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) != STATUS_PENDING)
+#endif
+#define HasOverlappedIoCompletedSync(lpOverlapped)	(((DWORD)(lpOverlapped)->Internal) == STATUS_COMPLETED_SYNCHRONOUSLY)
+
+#define DUMMY_HANDLE ((HANDLE)(LONG_PTR)-2)
+
+/* Windows versions */
+enum windows_version {
+	WINDOWS_CE = -2,
+	WINDOWS_UNDEFINED = -1,
+	WINDOWS_UNSUPPORTED = 0,
+	WINDOWS_XP = 0x51,
+	WINDOWS_2003 = 0x52,	// Also XP x64
+	WINDOWS_VISTA = 0x60,
+	WINDOWS_7 = 0x61,
+	WINDOWS_8 = 0x62,
+	WINDOWS_8_1_OR_LATER = 0x63,
+	WINDOWS_MAX
+};
+extern int windows_version;
+
+#define MAX_FDS     256
+
+#define POLLIN      0x0001    /* There is data to read */
+#define POLLPRI     0x0002    /* There is urgent data to read */
+#define POLLOUT     0x0004    /* Writing now will not block */
+#define POLLERR     0x0008    /* Error condition */
+#define POLLHUP     0x0010    /* Hung up */
+#define POLLNVAL    0x0020    /* Invalid request: fd not open */
+
+struct pollfd {
+    int fd;           /* file descriptor */
+    short events;     /* requested events */
+    short revents;    /* returned events */
+};
+
+// access modes
+enum rw_type {
+	RW_NONE,
+	RW_READ,
+	RW_WRITE,
+};
+
+// fd struct that can be used for polling on Windows
+typedef int cancel_transfer(struct usbi_transfer *itransfer);
+
+struct winfd {
+	int fd;							// what's exposed to libusb core
+	HANDLE handle;					// what we need to attach overlapped to the I/O op, so we can poll it
+	OVERLAPPED* overlapped;			// what will report our I/O status
+	struct usbi_transfer *itransfer;		// Associated transfer, or NULL if completed
+	cancel_transfer *cancel_fn;		// Function pointer to cancel transfer API
+	enum rw_type rw;				// I/O transfer direction: read *XOR* write (NOT BOTH)
+};
+extern const struct winfd INVALID_WINFD;
+
+int usbi_pipe(int pipefd[2]);
+int usbi_poll(struct pollfd *fds, unsigned int nfds, int timeout);
+ssize_t usbi_write(int fd, const void *buf, size_t count);
+ssize_t usbi_read(int fd, void *buf, size_t count);
+int usbi_close(int fd);
+
+void init_polling(void);
+void exit_polling(void);
+struct winfd usbi_create_fd(HANDLE handle, int access_mode, 
+	struct usbi_transfer *transfer, cancel_transfer *cancel_fn);
+void usbi_free_fd(struct winfd* winfd);
+struct winfd fd_to_winfd(int fd);
+struct winfd handle_to_winfd(HANDLE handle);
+struct winfd overlapped_to_winfd(OVERLAPPED* overlapped);
+
+/*
+ * Timeval operations
+ */
+#if defined(DDKBUILD)
+#include <winsock.h>	// defines timeval functions on DDK
+#endif
+
+#if !defined(TIMESPEC_TO_TIMEVAL)
+#define TIMESPEC_TO_TIMEVAL(tv, ts) {                   \
+	(tv)->tv_sec = (long)(ts)->tv_sec;                  \
+	(tv)->tv_usec = (long)(ts)->tv_nsec / 1000;         \
+}
+#endif
+#if !defined(timersub)
+#define timersub(a, b, result)                          \
+do {                                                    \
+	(result)->tv_sec = (a)->tv_sec - (b)->tv_sec;       \
+	(result)->tv_usec = (a)->tv_usec - (b)->tv_usec;    \
+	if ((result)->tv_usec < 0) {                        \
+		--(result)->tv_sec;                             \
+		(result)->tv_usec += 1000000;                   \
+	}                                                   \
+} while (0)
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/threads_posix.c

@@ -0,0 +1,79 @@
+/*
+ * libusb synchronization using POSIX Threads
+ *
+ * Copyright © 2011 Vitali Lovich <vlovich@aliph.com>
+ * Copyright © 2011 Peter Stuge <peter@stuge.se>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <time.h>
+#if defined(__linux__) || defined(__OpenBSD__)
+# if defined(__OpenBSD__)
+#  define _BSD_SOURCE
+# endif
+# include <unistd.h>
+# include <sys/syscall.h>
+#elif defined(__APPLE__)
+# include <mach/mach.h>
+#elif defined(__CYGWIN__)
+# include <windows.h>
+#endif
+
+#include "threads_posix.h"
+#include "libusbi.h"
+
+int usbi_cond_timedwait(pthread_cond_t *cond,
+	pthread_mutex_t *mutex, const struct timeval *tv)
+{
+	struct timespec timeout;
+	int r;
+
+	r = usbi_backend->clock_gettime(USBI_CLOCK_REALTIME, &timeout);
+	if (r < 0)
+		return r;
+
+	timeout.tv_sec += tv->tv_sec;
+	timeout.tv_nsec += tv->tv_usec * 1000;
+	while (timeout.tv_nsec >= 1000000000L) {
+		timeout.tv_nsec -= 1000000000L;
+		timeout.tv_sec++;
+	}
+
+	return pthread_cond_timedwait(cond, mutex, &timeout);
+}
+
+int usbi_get_tid(void)
+{
+	int ret = -1;
+#if defined(__ANDROID__)
+	ret = gettid();
+#elif defined(__linux__)
+	ret = syscall(SYS_gettid);
+#elif defined(__OpenBSD__)
+	/* The following only works with OpenBSD > 5.1 as it requires
+	   real thread support. For 5.1 and earlier, -1 is returned. */
+	ret = syscall(SYS_getthrid);
+#elif defined(__APPLE__)
+	ret = mach_thread_self();
+	mach_port_deallocate(mach_task_self(), ret);
+#elif defined(__CYGWIN__)
+	ret = GetCurrentThreadId();
+#endif
+/* TODO: NetBSD thread ID support */
+	return ret;
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/threads_posix.h

@@ -0,0 +1,55 @@
+/*
+ * libusb synchronization using POSIX Threads
+ *
+ * Copyright © 2010 Peter Stuge <peter@stuge.se>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIBUSB_THREADS_POSIX_H
+#define LIBUSB_THREADS_POSIX_H
+
+#include <pthread.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#define usbi_mutex_static_t		pthread_mutex_t
+#define USBI_MUTEX_INITIALIZER		PTHREAD_MUTEX_INITIALIZER
+#define usbi_mutex_static_lock		pthread_mutex_lock
+#define usbi_mutex_static_unlock	pthread_mutex_unlock
+
+#define usbi_mutex_t			pthread_mutex_t
+#define usbi_mutex_init(mutex)		pthread_mutex_init((mutex), NULL)
+#define usbi_mutex_lock			pthread_mutex_lock
+#define usbi_mutex_unlock		pthread_mutex_unlock
+#define usbi_mutex_trylock		pthread_mutex_trylock
+#define usbi_mutex_destroy		pthread_mutex_destroy
+
+#define usbi_cond_t			pthread_cond_t
+#define usbi_cond_init(cond)		pthread_cond_init((cond), NULL)
+#define usbi_cond_wait			pthread_cond_wait
+#define usbi_cond_broadcast		pthread_cond_broadcast
+#define usbi_cond_destroy		pthread_cond_destroy
+
+#define usbi_tls_key_t			pthread_key_t
+#define usbi_tls_key_create(key)	pthread_key_create((key), NULL)
+#define usbi_tls_key_get		pthread_getspecific
+#define usbi_tls_key_set		pthread_setspecific
+#define usbi_tls_key_delete		pthread_key_delete
+
+int usbi_get_tid(void);
+
+#endif /* LIBUSB_THREADS_POSIX_H */

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/threads_windows.c

@@ -0,0 +1,268 @@
+/*
+ * libusb synchronization on Microsoft Windows
+ *
+ * Copyright © 2010 Michael Plante <michael.plante@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <objbase.h>
+#include <errno.h>
+
+#ifdef OS_WINDOWS
+	#include <oledlg.h>
+
+	#include <windows.h>
+	#if defined(interface)
+	#undef interface
+	#endif
+#endif
+
+#include "libusbi.h"
+
+struct usbi_cond_perthread {
+	struct list_head list;
+	DWORD tid;
+	HANDLE event;
+};
+
+int usbi_mutex_static_lock(usbi_mutex_static_t *mutex)
+{
+	if (!mutex)
+		return EINVAL;
+	while (InterlockedExchange(mutex, 1) == 1)
+		SleepEx(0, TRUE);
+	return 0;
+}
+
+int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex)
+{
+	if (!mutex)
+		return EINVAL;
+	InterlockedExchange(mutex, 0);
+	return 0;
+}
+
+int usbi_mutex_init(usbi_mutex_t *mutex)
+{
+	if (!mutex)
+		return EINVAL;
+	*mutex = CreateMutex(NULL, FALSE, NULL);
+	if (!*mutex)
+		return ENOMEM;
+	return 0;
+}
+
+int usbi_mutex_lock(usbi_mutex_t *mutex)
+{
+	DWORD result;
+
+	if (!mutex)
+		return EINVAL;
+	result = WaitForSingleObject(*mutex, INFINITE);
+	if (result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
+		return 0; // acquired (ToDo: check that abandoned is ok)
+	else
+		return EINVAL; // don't know how this would happen
+			       //   so don't know proper errno
+}
+
+int usbi_mutex_unlock(usbi_mutex_t *mutex)
+{
+	if (!mutex)
+		return EINVAL;
+	if (ReleaseMutex(*mutex))
+		return 0;
+	else
+		return EPERM;
+}
+
+int usbi_mutex_trylock(usbi_mutex_t *mutex)
+{
+	DWORD result;
+
+	if (!mutex)
+		return EINVAL;
+	result = WaitForSingleObject(*mutex, 0);
+	if (result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
+		return 0; // acquired (ToDo: check that abandoned is ok)
+	else if (result == WAIT_TIMEOUT)
+		return EBUSY;
+	else
+		return EINVAL; // don't know how this would happen
+			       //   so don't know proper error
+}
+
+int usbi_mutex_destroy(usbi_mutex_t *mutex)
+{
+	// It is not clear if CloseHandle failure is due to failure to unlock.
+	//   If so, this should be errno=EBUSY.
+	if (!mutex || !CloseHandle(*mutex))
+		return EINVAL;
+	*mutex = NULL;
+	return 0;
+}
+
+int usbi_cond_init(usbi_cond_t *cond)
+{
+	if (!cond)
+		return EINVAL;
+	list_init(&cond->waiters);
+	list_init(&cond->not_waiting);
+	return 0;
+}
+
+int usbi_cond_destroy(usbi_cond_t *cond)
+{
+	// This assumes no one is using this anymore.  The check MAY NOT BE safe.
+	struct usbi_cond_perthread *pos, *next_pos;
+
+	if(!cond)
+		return EINVAL;
+	if (!list_empty(&cond->waiters))
+		return EBUSY; // (!see above!)
+	list_for_each_entry_safe(pos, next_pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
+		CloseHandle(pos->event);
+		list_del(&pos->list);
+		free(pos);
+	}
+	return 0;
+}
+
+int usbi_cond_broadcast(usbi_cond_t *cond)
+{
+	// Assumes mutex is locked; this is not in keeping with POSIX spec, but
+	//   libusb does this anyway, so we simplify by not adding more sync
+	//   primitives to the CV definition!
+	int fail = 0;
+	struct usbi_cond_perthread *pos;
+
+	if (!cond)
+		return EINVAL;
+	list_for_each_entry(pos, &cond->waiters, list, struct usbi_cond_perthread) {
+		if (!SetEvent(pos->event))
+			fail = 1;
+	}
+	// The wait function will remove its respective item from the list.
+	return fail ? EINVAL : 0;
+}
+
+__inline static int usbi_cond_intwait(usbi_cond_t *cond,
+	usbi_mutex_t *mutex, DWORD timeout_ms)
+{
+	struct usbi_cond_perthread *pos;
+	int r, found = 0;
+	DWORD r2, tid = GetCurrentThreadId();
+
+	if (!cond || !mutex)
+		return EINVAL;
+	list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
+		if(tid == pos->tid) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (!found) {
+		pos = calloc(1, sizeof(struct usbi_cond_perthread));
+		if (!pos)
+			return ENOMEM; // This errno is not POSIX-allowed.
+		pos->tid = tid;
+		pos->event = CreateEvent(NULL, FALSE, FALSE, NULL); // auto-reset.
+		if (!pos->event) {
+			free(pos);
+			return ENOMEM;
+		}
+		list_add(&pos->list, &cond->not_waiting);
+	}
+
+	list_del(&pos->list); // remove from not_waiting list.
+	list_add(&pos->list, &cond->waiters);
+
+	r  = usbi_mutex_unlock(mutex);
+	if (r)
+		return r;
+
+	r2 = WaitForSingleObject(pos->event, timeout_ms);
+	r = usbi_mutex_lock(mutex);
+	if (r)
+		return r;
+
+	list_del(&pos->list);
+	list_add(&pos->list, &cond->not_waiting);
+
+	if (r2 == WAIT_OBJECT_0)
+		return 0;
+	else if (r2 == WAIT_TIMEOUT)
+		return ETIMEDOUT;
+	else
+		return EINVAL;
+}
+// N.B.: usbi_cond_*wait() can also return ENOMEM, even though pthread_cond_*wait cannot!
+int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex)
+{
+	return usbi_cond_intwait(cond, mutex, INFINITE);
+}
+
+int usbi_cond_timedwait(usbi_cond_t *cond,
+	usbi_mutex_t *mutex, const struct timeval *tv)
+{
+	DWORD millis;
+
+	millis = (DWORD)(tv->tv_sec * 1000) + (tv->tv_usec / 1000);
+	/* round up to next millisecond */
+	if (tv->tv_usec % 1000)
+		millis++;
+	return usbi_cond_intwait(cond, mutex, millis);
+}
+
+int usbi_tls_key_create(usbi_tls_key_t *key)
+{
+	if (!key)
+		return EINVAL;
+	*key = TlsAlloc();
+	if (*key == TLS_OUT_OF_INDEXES)
+		return ENOMEM;
+	else
+		return 0;
+}
+
+void *usbi_tls_key_get(usbi_tls_key_t key)
+{
+	return TlsGetValue(key);
+}
+
+int usbi_tls_key_set(usbi_tls_key_t key, void *value)
+{
+	if (TlsSetValue(key, value))
+		return 0;
+	else
+		return EINVAL;
+}
+
+int usbi_tls_key_delete(usbi_tls_key_t key)
+{
+	if (TlsFree(key))
+		return 0;
+	else
+		return EINVAL;
+}
+
+int usbi_get_tid(void)
+{
+	return (int)GetCurrentThreadId();
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/threads_windows.h

@@ -0,0 +1,76 @@
+/*
+ * libusb synchronization on Microsoft Windows
+ *
+ * Copyright © 2010 Michael Plante <michael.plante@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIBUSB_THREADS_WINDOWS_H
+#define LIBUSB_THREADS_WINDOWS_H
+
+#define usbi_mutex_static_t	volatile LONG
+#define USBI_MUTEX_INITIALIZER	0
+
+#define usbi_mutex_t		HANDLE
+
+typedef struct usbi_cond {
+	// Every time a thread touches the CV, it winds up in one of these lists.
+	//   It stays there until the CV is destroyed, even if the thread terminates.
+	struct list_head waiters;
+	struct list_head not_waiting;
+} usbi_cond_t;
+
+// We *were* getting timespec from pthread.h:
+#if (!defined(HAVE_STRUCT_TIMESPEC) && !defined(_TIMESPEC_DEFINED))
+#define HAVE_STRUCT_TIMESPEC 1
+#define _TIMESPEC_DEFINED 1
+struct timespec {
+	long tv_sec;
+	long tv_nsec;
+};
+#endif /* HAVE_STRUCT_TIMESPEC | _TIMESPEC_DEFINED */
+
+// We *were* getting ETIMEDOUT from pthread.h:
+#ifndef ETIMEDOUT
+#  define ETIMEDOUT 10060     /* This is the value in winsock.h. */
+#endif
+
+#define usbi_tls_key_t		DWORD
+
+int usbi_mutex_static_lock(usbi_mutex_static_t *mutex);
+int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex);
+
+int usbi_mutex_init(usbi_mutex_t *mutex);
+int usbi_mutex_lock(usbi_mutex_t *mutex);
+int usbi_mutex_unlock(usbi_mutex_t *mutex);
+int usbi_mutex_trylock(usbi_mutex_t *mutex);
+int usbi_mutex_destroy(usbi_mutex_t *mutex);
+
+int usbi_cond_init(usbi_cond_t *cond);
+int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex);
+int usbi_cond_timedwait(usbi_cond_t *cond,
+	usbi_mutex_t *mutex, const struct timeval *tv);
+int usbi_cond_broadcast(usbi_cond_t *cond);
+int usbi_cond_destroy(usbi_cond_t *cond);
+
+int usbi_tls_key_create(usbi_tls_key_t *key);
+void *usbi_tls_key_get(usbi_tls_key_t key);
+int usbi_tls_key_set(usbi_tls_key_t key, void *value);
+int usbi_tls_key_delete(usbi_tls_key_t key);
+
+int usbi_get_tid(void);
+
+#endif /* LIBUSB_THREADS_WINDOWS_H */

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/windows_common.h

@@ -0,0 +1,124 @@
+/*
+ * Windows backend common header for libusb 1.0
+ *
+ * This file brings together header code common between
+ * the desktop Windows and Windows CE backends.
+ * Copyright © 2012-2013 RealVNC Ltd.
+ * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
+ * Major code testing contribution by Xiaofan Chen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#pragma once
+
+// Windows API default is uppercase - ugh!
+#if !defined(bool)
+#define bool BOOL
+#endif
+#if !defined(true)
+#define true TRUE
+#endif
+#if !defined(false)
+#define false FALSE
+#endif
+
+#define EPOCH_TIME	UINT64_C(116444736000000000)	// 1970.01.01 00:00:000 in MS Filetime
+
+#if defined(__CYGWIN__ )
+#define _stricmp strcasecmp
+#define _strdup strdup
+// _beginthreadex is MSVCRT => unavailable for cygwin. Fallback to using CreateThread
+#define _beginthreadex(a, b, c, d, e, f) CreateThread(a, b, (LPTHREAD_START_ROUTINE)c, d, e, (LPDWORD)f)
+#endif
+
+#define safe_free(p) do {if (p != NULL) {free((void *)p); p = NULL;}} while (0)
+
+#ifndef ARRAYSIZE
+#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
+#endif
+
+#define ERR_BUFFER_SIZE	256
+
+/*
+ * API macros - leveraged from libusb-win32 1.x
+ */
+#ifndef _WIN32_WCE
+#define DLL_STRINGIFY(s) #s
+#define DLL_LOAD_LIBRARY(name) LoadLibraryA(DLL_STRINGIFY(name))
+#else
+#define DLL_STRINGIFY(s) L#s
+#define DLL_LOAD_LIBRARY(name) LoadLibrary(DLL_STRINGIFY(name))
+#endif
+
+/*
+ * Macros for handling DLL themselves
+ */
+#define DLL_DECLARE_HANDLE(name)				\
+	static HMODULE __dll_##name##_handle = NULL
+
+#define DLL_GET_HANDLE(name)					\
+	do {							\
+		__dll_##name##_handle = DLL_LOAD_LIBRARY(name);	\
+		if (!__dll_##name##_handle)			\
+			return LIBUSB_ERROR_OTHER;		\
+	} while (0)
+
+#define DLL_FREE_HANDLE(name)					\
+	do {							\
+		if (__dll_##name##_handle) {			\
+			FreeLibrary(__dll_##name##_handle);	\
+			__dll_##name##_handle = NULL;		\
+		}						\
+	} while(0)
+
+
+/*
+ * Macros for handling functions within a DLL
+ */
+#define DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefixname, name, args)	\
+	typedef ret (api * __dll_##name##_func_t)args;			\
+	static __dll_##name##_func_t prefixname = NULL
+
+#define DLL_DECLARE_FUNC(api, ret, name, args)				\
+	DLL_DECLARE_FUNC_PREFIXNAME(api, ret, name, name, args)
+#define DLL_DECLARE_FUNC_PREFIXED(api, ret, prefix, name, args)		\
+	DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefix##name, name, args)
+
+#define DLL_LOAD_FUNC_PREFIXNAME(dll, prefixname, name, ret_on_failure)	\
+	do {								\
+		HMODULE h = __dll_##dll##_handle;			\
+		prefixname = (__dll_##name##_func_t)GetProcAddress(h,	\
+				DLL_STRINGIFY(name));			\
+		if (prefixname)						\
+			break;						\
+		prefixname = (__dll_##name##_func_t)GetProcAddress(h,	\
+				DLL_STRINGIFY(name) DLL_STRINGIFY(A));	\
+		if (prefixname)						\
+			break;						\
+		prefixname = (__dll_##name##_func_t)GetProcAddress(h,	\
+				DLL_STRINGIFY(name) DLL_STRINGIFY(W));	\
+		if (prefixname)						\
+			break;						\
+		if (ret_on_failure)					\
+			return LIBUSB_ERROR_NOT_FOUND;			\
+	} while(0)
+
+#define DLL_LOAD_FUNC(dll, name, ret_on_failure)			\
+	DLL_LOAD_FUNC_PREFIXNAME(dll, name, name, ret_on_failure)
+#define DLL_LOAD_FUNC_PREFIXED(dll, prefix, name, ret_on_failure)	\
+	DLL_LOAD_FUNC_PREFIXNAME(dll, prefix##name, name, ret_on_failure)

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/windows_nt_common.c

@@ -0,0 +1,591 @@
+/*
+ * windows backend for libusb 1.0
+ * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
+ * HID Reports IOCTLs inspired from HIDAPI by Alan Ott, Signal 11 Software
+ * Hash table functions adapted from glibc, by Ulrich Drepper et al.
+ * Major code testing contribution by Xiaofan Chen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <inttypes.h>
+#include <process.h>
+#include <stdio.h>
+
+#include "libusbi.h"
+#include "windows_common.h"
+#include "windows_nt_common.h"
+
+// Global variables for clock_gettime mechanism
+static uint64_t hires_ticks_to_ps;
+static uint64_t hires_frequency;
+
+#define TIMER_REQUEST_RETRY_MS	100
+#define WM_TIMER_REQUEST	(WM_USER + 1)
+#define WM_TIMER_EXIT		(WM_USER + 2)
+
+// used for monotonic clock_gettime()
+struct timer_request {
+	struct timespec *tp;
+	HANDLE event;
+};
+
+// Timer thread
+static HANDLE timer_thread = NULL;
+static DWORD timer_thread_id = 0;
+
+/* User32 dependencies */
+DLL_DECLARE_HANDLE(User32);
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, GetMessageA, (LPMSG, HWND, UINT, UINT));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, PeekMessageA, (LPMSG, HWND, UINT, UINT, UINT));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, PostThreadMessageA, (DWORD, UINT, WPARAM, LPARAM));
+
+static unsigned __stdcall windows_clock_gettime_threaded(void *param);
+
+/*
+* Converts a windows error to human readable string
+* uses retval as errorcode, or, if 0, use GetLastError()
+*/
+#if defined(ENABLE_LOGGING)
+const char *windows_error_str(DWORD error_code)
+{
+	static char err_string[ERR_BUFFER_SIZE];
+
+	DWORD size;
+	int len;
+
+	if (error_code == 0)
+		error_code = GetLastError();
+
+	len = sprintf(err_string, "[%u] ", (unsigned int)error_code);
+
+	// Translate codes returned by SetupAPI. The ones we are dealing with are either
+	// in 0x0000xxxx or 0xE000xxxx and can be distinguished from standard error codes.
+	// See http://msdn.microsoft.com/en-us/library/windows/hardware/ff545011.aspx
+	switch (error_code & 0xE0000000) {
+	case 0:
+		error_code = HRESULT_FROM_WIN32(error_code); // Still leaves ERROR_SUCCESS unmodified
+		break;
+	case 0xE0000000:
+		error_code = 0x80000000 | (FACILITY_SETUPAPI << 16) | (error_code & 0x0000FFFF);
+		break;
+	default:
+		break;
+	}
+
+	size = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
+			NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+			&err_string[len], ERR_BUFFER_SIZE - len, NULL);
+	if (size == 0) {
+		DWORD format_error = GetLastError();
+		if (format_error)
+			snprintf(err_string, ERR_BUFFER_SIZE,
+				"Windows error code %u (FormatMessage error code %u)",
+				(unsigned int)error_code, (unsigned int)format_error);
+		else
+			snprintf(err_string, ERR_BUFFER_SIZE, "Unknown error code %u", (unsigned int)error_code);
+	} else {
+		// Remove CRLF from end of message, if present
+		size_t pos = len + size - 2;
+		if (err_string[pos] == '\r')
+			err_string[pos] = '\0';
+	}
+
+	return err_string;
+}
+#endif
+
+/* Hash table functions - modified From glibc 2.3.2:
+   [Aho,Sethi,Ullman] Compilers: Principles, Techniques and Tools, 1986
+   [Knuth]            The Art of Computer Programming, part 3 (6.4)  */
+
+#define HTAB_SIZE 1021UL	// *MUST* be a prime number!!
+
+typedef struct htab_entry {
+	unsigned long used;
+	char *str;
+} htab_entry;
+
+static htab_entry *htab_table = NULL;
+static usbi_mutex_t htab_mutex = NULL;
+static unsigned long htab_filled;
+
+/* Before using the hash table we must allocate memory for it.
+   We allocate one element more as the found prime number says.
+   This is done for more effective indexing as explained in the
+   comment for the hash function.  */
+static bool htab_create(struct libusb_context *ctx)
+{
+	if (htab_table != NULL) {
+		usbi_err(ctx, "hash table already allocated");
+		return true;
+	}
+
+	// Create a mutex
+	usbi_mutex_init(&htab_mutex);
+
+	usbi_dbg("using %lu entries hash table", HTAB_SIZE);
+	htab_filled = 0;
+
+	// allocate memory and zero out.
+	htab_table = calloc(HTAB_SIZE + 1, sizeof(htab_entry));
+	if (htab_table == NULL) {
+		usbi_err(ctx, "could not allocate space for hash table");
+		return false;
+	}
+
+	return true;
+}
+
+/* After using the hash table it has to be destroyed.  */
+static void htab_destroy(void)
+{
+	unsigned long i;
+
+	if (htab_table == NULL)
+		return;
+
+	for (i = 0; i < HTAB_SIZE; i++)
+		free(htab_table[i].str);
+
+	safe_free(htab_table);
+
+	usbi_mutex_destroy(&htab_mutex);
+}
+
+/* This is the search function. It uses double hashing with open addressing.
+   We use a trick to speed up the lookup. The table is created with one
+   more element available. This enables us to use the index zero special.
+   This index will never be used because we store the first hash index in
+   the field used where zero means not used. Every other value means used.
+   The used field can be used as a first fast comparison for equality of
+   the stored and the parameter value. This helps to prevent unnecessary
+   expensive calls of strcmp.  */
+unsigned long htab_hash(const char *str)
+{
+	unsigned long hval, hval2;
+	unsigned long idx;
+	unsigned long r = 5381;
+	int c;
+	const char *sz = str;
+
+	if (str == NULL)
+		return 0;
+
+	// Compute main hash value (algorithm suggested by Nokia)
+	while ((c = *sz++) != 0)
+		r = ((r << 5) + r) + c;
+	if (r == 0)
+		++r;
+
+	// compute table hash: simply take the modulus
+	hval = r % HTAB_SIZE;
+	if (hval == 0)
+		++hval;
+
+	// Try the first index
+	idx = hval;
+
+	// Mutually exclusive access (R/W lock would be better)
+	usbi_mutex_lock(&htab_mutex);
+
+	if (htab_table[idx].used) {
+		if ((htab_table[idx].used == hval) && (strcmp(str, htab_table[idx].str) == 0))
+			goto out_unlock; // existing hash
+
+		usbi_dbg("hash collision ('%s' vs '%s')", str, htab_table[idx].str);
+
+		// Second hash function, as suggested in [Knuth]
+		hval2 = 1 + hval % (HTAB_SIZE - 2);
+
+		do {
+			// Because size is prime this guarantees to step through all available indexes
+			if (idx <= hval2)
+				idx = HTAB_SIZE + idx - hval2;
+			else
+				idx -= hval2;
+
+			// If we visited all entries leave the loop unsuccessfully
+			if (idx == hval)
+				break;
+
+			// If entry is found use it.
+			if ((htab_table[idx].used == hval) && (strcmp(str, htab_table[idx].str) == 0))
+				goto out_unlock;
+		} while (htab_table[idx].used);
+	}
+
+	// Not found => New entry
+
+	// If the table is full return an error
+	if (htab_filled >= HTAB_SIZE) {
+		usbi_err(NULL, "hash table is full (%lu entries)", HTAB_SIZE);
+		idx = 0;
+		goto out_unlock;
+	}
+
+	htab_table[idx].str = _strdup(str);
+	if (htab_table[idx].str == NULL) {
+		usbi_err(NULL, "could not duplicate string for hash table");
+		idx = 0;
+		goto out_unlock;
+	}
+
+	htab_table[idx].used = hval;
+	++htab_filled;
+
+out_unlock:
+	usbi_mutex_unlock(&htab_mutex);
+
+	return idx;
+}
+
+static int windows_init_dlls(void)
+{
+	DLL_GET_HANDLE(User32);
+	DLL_LOAD_FUNC_PREFIXED(User32, p, GetMessageA, TRUE);
+	DLL_LOAD_FUNC_PREFIXED(User32, p, PeekMessageA, TRUE);
+	DLL_LOAD_FUNC_PREFIXED(User32, p, PostThreadMessageA, TRUE);
+
+	return LIBUSB_SUCCESS;
+}
+
+static void windows_exit_dlls(void)
+{
+	DLL_FREE_HANDLE(User32);
+}
+
+static bool windows_init_clock(struct libusb_context *ctx)
+{
+	DWORD_PTR affinity, dummy;
+	HANDLE event = NULL;
+	LARGE_INTEGER li_frequency;
+	int i;
+
+	if (QueryPerformanceFrequency(&li_frequency)) {
+		// Load DLL imports
+		if (windows_init_dlls() != LIBUSB_SUCCESS) {
+			usbi_err(ctx, "could not resolve DLL functions");
+			return false;
+		}
+
+		// The hires frequency can go as high as 4 GHz, so we'll use a conversion
+		// to picoseconds to compute the tv_nsecs part in clock_gettime
+		hires_frequency = li_frequency.QuadPart;
+		hires_ticks_to_ps = UINT64_C(1000000000000) / hires_frequency;
+		usbi_dbg("hires timer available (Frequency: %"PRIu64" Hz)", hires_frequency);
+
+		// Because QueryPerformanceCounter might report different values when
+		// running on different cores, we create a separate thread for the timer
+		// calls, which we glue to the first available core always to prevent timing discrepancies.
+		if (!GetProcessAffinityMask(GetCurrentProcess(), &affinity, &dummy) || (affinity == 0)) {
+			usbi_err(ctx, "could not get process affinity: %s", windows_error_str(0));
+			return false;
+		}
+
+		// The process affinity mask is a bitmask where each set bit represents a core on
+		// which this process is allowed to run, so we find the first set bit
+		for (i = 0; !(affinity & (DWORD_PTR)(1 << i)); i++);
+		affinity = (DWORD_PTR)(1 << i);
+
+		usbi_dbg("timer thread will run on core #%d", i);
+
+		event = CreateEvent(NULL, FALSE, FALSE, NULL);
+		if (event == NULL) {
+			usbi_err(ctx, "could not create event: %s", windows_error_str(0));
+			return false;
+		}
+
+		timer_thread = (HANDLE)_beginthreadex(NULL, 0, windows_clock_gettime_threaded, (void *)event,
+				0, (unsigned int *)&timer_thread_id);
+		if (timer_thread == NULL) {
+			usbi_err(ctx, "unable to create timer thread - aborting");
+			CloseHandle(event);
+			return false;
+		}
+
+		if (!SetThreadAffinityMask(timer_thread, affinity))
+			usbi_warn(ctx, "unable to set timer thread affinity, timer discrepancies may arise");
+
+		// Wait for timer thread to init before continuing.
+		if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0) {
+			usbi_err(ctx, "failed to wait for timer thread to become ready - aborting");
+			CloseHandle(event);
+			return false;
+		}
+
+		CloseHandle(event);
+	} else {
+		usbi_dbg("no hires timer available on this platform");
+		hires_frequency = 0;
+		hires_ticks_to_ps = UINT64_C(0);
+	}
+
+	return true;
+}
+
+void windows_destroy_clock(void)
+{
+	if (timer_thread) {
+		// actually the signal to quit the thread.
+		if (!pPostThreadMessageA(timer_thread_id, WM_TIMER_EXIT, 0, 0)
+				|| (WaitForSingleObject(timer_thread, INFINITE) != WAIT_OBJECT_0)) {
+			usbi_dbg("could not wait for timer thread to quit");
+			TerminateThread(timer_thread, 1);
+			// shouldn't happen, but we're destroying
+			// all objects it might have held anyway.
+		}
+		CloseHandle(timer_thread);
+		timer_thread = NULL;
+		timer_thread_id = 0;
+	}
+}
+
+/*
+* Monotonic and real time functions
+*/
+static unsigned __stdcall windows_clock_gettime_threaded(void *param)
+{
+	struct timer_request *request;
+	LARGE_INTEGER hires_counter;
+	MSG msg;
+
+	// The following call will create this thread's message queue
+	// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644946.aspx
+	pPeekMessageA(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
+
+	// Signal windows_init_clock() that we're ready to service requests
+	if (!SetEvent((HANDLE)param))
+		usbi_dbg("SetEvent failed for timer init event: %s", windows_error_str(0));
+	param = NULL;
+
+	// Main loop - wait for requests
+	while (1) {
+		if (pGetMessageA(&msg, NULL, WM_TIMER_REQUEST, WM_TIMER_EXIT) == -1) {
+			usbi_err(NULL, "GetMessage failed for timer thread: %s", windows_error_str(0));
+			return 1;
+		}
+
+		switch (msg.message) {
+		case WM_TIMER_REQUEST:
+			// Requests to this thread are for hires always
+			// Microsoft says that this function always succeeds on XP and later
+			// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms644904.aspx
+			request = (struct timer_request *)msg.lParam;
+			QueryPerformanceCounter(&hires_counter);
+			request->tp->tv_sec = (long)(hires_counter.QuadPart / hires_frequency);
+			request->tp->tv_nsec = (long)(((hires_counter.QuadPart % hires_frequency) / 1000) * hires_ticks_to_ps);
+			if (!SetEvent(request->event))
+				usbi_err(NULL, "SetEvent failed for timer request: %s", windows_error_str(0));
+			break;
+		case WM_TIMER_EXIT:
+			usbi_dbg("timer thread quitting");
+			return 0;
+		}
+	}
+}
+
+int windows_clock_gettime(int clk_id, struct timespec *tp)
+{
+	struct timer_request request;
+#if !defined(_MSC_VER) || (_MSC_VER < 1900)
+	FILETIME filetime;
+	ULARGE_INTEGER rtime;
+#endif
+	DWORD r;
+
+	switch (clk_id) {
+	case USBI_CLOCK_MONOTONIC:
+		if (timer_thread) {
+			request.tp = tp;
+			request.event = CreateEvent(NULL, FALSE, FALSE, NULL);
+			if (request.event == NULL)
+				return LIBUSB_ERROR_NO_MEM;
+
+			if (!pPostThreadMessageA(timer_thread_id, WM_TIMER_REQUEST, 0, (LPARAM)&request)) {
+				usbi_err(NULL, "PostThreadMessage failed for timer thread: %s", windows_error_str(0));
+				CloseHandle(request.event);
+				return LIBUSB_ERROR_OTHER;
+			}
+
+			do {
+				r = WaitForSingleObject(request.event, TIMER_REQUEST_RETRY_MS);
+				if (r == WAIT_TIMEOUT)
+					usbi_dbg("could not obtain a timer value within reasonable timeframe - too much load?");
+				else if (r == WAIT_FAILED)
+					usbi_err(NULL, "WaitForSingleObject failed: %s", windows_error_str(0));
+			} while (r == WAIT_TIMEOUT);
+			CloseHandle(request.event);
+
+			if (r == WAIT_OBJECT_0)
+				return LIBUSB_SUCCESS;
+			else
+				return LIBUSB_ERROR_OTHER;
+		}
+		// Fall through and return real-time if monotonic was not detected @ timer init
+	case USBI_CLOCK_REALTIME:
+#if defined(_MSC_VER) && (_MSC_VER >= 1900)
+		timespec_get(tp, TIME_UTC);
+#else
+		// We follow http://msdn.microsoft.com/en-us/library/ms724928%28VS.85%29.aspx
+		// with a predef epoch time to have an epoch that starts at 1970.01.01 00:00
+		// Note however that our resolution is bounded by the Windows system time
+		// functions and is at best of the order of 1 ms (or, usually, worse)
+		GetSystemTimeAsFileTime(&filetime);
+		rtime.LowPart = filetime.dwLowDateTime;
+		rtime.HighPart = filetime.dwHighDateTime;
+		rtime.QuadPart -= EPOCH_TIME;
+		tp->tv_sec = (long)(rtime.QuadPart / 10000000);
+		tp->tv_nsec = (long)((rtime.QuadPart % 10000000) * 100);
+#endif
+		return LIBUSB_SUCCESS;
+	default:
+		return LIBUSB_ERROR_INVALID_PARAM;
+	}
+}
+
+static void windows_transfer_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size)
+{
+	int status, istatus;
+
+	usbi_dbg("handling I/O completion with errcode %u, size %u", io_result, io_size);
+
+	switch (io_result) {
+	case NO_ERROR:
+		status = windows_copy_transfer_data(itransfer, io_size);
+		break;
+	case ERROR_GEN_FAILURE:
+		usbi_dbg("detected endpoint stall");
+		status = LIBUSB_TRANSFER_STALL;
+		break;
+	case ERROR_SEM_TIMEOUT:
+		usbi_dbg("detected semaphore timeout");
+		status = LIBUSB_TRANSFER_TIMED_OUT;
+		break;
+	case ERROR_OPERATION_ABORTED:
+		istatus = windows_copy_transfer_data(itransfer, io_size);
+		if (istatus != LIBUSB_TRANSFER_COMPLETED)
+			usbi_dbg("Failed to copy partial data in aborted operation: %d", istatus);
+
+		usbi_dbg("detected operation aborted");
+		status = LIBUSB_TRANSFER_CANCELLED;
+		break;
+	default:
+		usbi_err(ITRANSFER_CTX(itransfer), "detected I/O error %u: %s", io_result, windows_error_str(io_result));
+		status = LIBUSB_TRANSFER_ERROR;
+		break;
+	}
+	windows_clear_transfer_priv(itransfer);	// Cancel polling
+	if (status == LIBUSB_TRANSFER_CANCELLED)
+		usbi_handle_transfer_cancellation(itransfer);
+	else
+		usbi_handle_transfer_completion(itransfer, (enum libusb_transfer_status)status);
+}
+
+void windows_handle_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size)
+{
+	struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
+
+	switch (transfer->type) {
+	case LIBUSB_TRANSFER_TYPE_CONTROL:
+	case LIBUSB_TRANSFER_TYPE_BULK:
+	case LIBUSB_TRANSFER_TYPE_INTERRUPT:
+	case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
+		windows_transfer_callback(itransfer, io_result, io_size);
+		break;
+	case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
+		usbi_warn(ITRANSFER_CTX(itransfer), "bulk stream transfers are not yet supported on this platform");
+		break;
+	default:
+		usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type);
+	}
+}
+
+int windows_handle_events(struct libusb_context *ctx, struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready)
+{
+	POLL_NFDS_TYPE i;
+	bool found = false;
+	struct usbi_transfer *transfer;
+	struct winfd *pollable_fd = NULL;
+	DWORD io_size, io_result;
+	int r = LIBUSB_SUCCESS;
+
+	usbi_mutex_lock(&ctx->open_devs_lock);
+	for (i = 0; i < nfds && num_ready > 0; i++) {
+
+		usbi_dbg("checking fd %d with revents = %04x", fds[i].fd, fds[i].revents);
+
+		if (!fds[i].revents)
+			continue;
+
+		num_ready--;
+
+		// Because a Windows OVERLAPPED is used for poll emulation,
+		// a pollable fd is created and stored with each transfer
+		usbi_mutex_lock(&ctx->flying_transfers_lock);
+		found = false;
+		list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) {
+			pollable_fd = windows_get_fd(transfer);
+			if (pollable_fd->fd == fds[i].fd) {
+				found = true;
+				break;
+			}
+		}
+		usbi_mutex_unlock(&ctx->flying_transfers_lock);
+
+		if (found) {
+			windows_get_overlapped_result(transfer, pollable_fd, &io_result, &io_size);
+
+			usbi_remove_pollfd(ctx, pollable_fd->fd);
+			// let handle_callback free the event using the transfer wfd
+			// If you don't use the transfer wfd, you run a risk of trying to free a
+			// newly allocated wfd that took the place of the one from the transfer.
+			windows_handle_callback(transfer, io_result, io_size);
+		} else {
+			usbi_err(ctx, "could not find a matching transfer for fd %d", fds[i]);
+			r = LIBUSB_ERROR_NOT_FOUND;
+			break;
+		}
+	}
+	usbi_mutex_unlock(&ctx->open_devs_lock);
+
+	return r;
+}
+
+int windows_common_init(struct libusb_context *ctx)
+{
+	if (!windows_init_clock(ctx))
+		goto error_roll_back;
+
+	if (!htab_create(ctx))
+		goto error_roll_back;
+
+	return LIBUSB_SUCCESS;
+
+error_roll_back:
+	windows_common_exit();
+	return LIBUSB_ERROR_NO_MEM;
+}
+
+void windows_common_exit(void)
+{
+	htab_destroy();
+	windows_destroy_clock();
+	windows_exit_dlls();
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/windows_nt_common.h

@@ -0,0 +1,63 @@
+/*
+ * Windows backend common header for libusb 1.0
+ *
+ * This file brings together header code common between
+ * the desktop Windows backends.
+ * Copyright © 2012-2013 RealVNC Ltd.
+ * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
+ * Major code testing contribution by Xiaofan Chen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#pragma once
+
+// Missing from MinGW
+#if !defined(FACILITY_SETUPAPI)
+#define FACILITY_SETUPAPI	15
+#endif
+
+typedef struct USB_CONFIGURATION_DESCRIPTOR {
+  UCHAR  bLength;
+  UCHAR  bDescriptorType;
+  USHORT wTotalLength;
+  UCHAR  bNumInterfaces;
+  UCHAR  bConfigurationValue;
+  UCHAR  iConfiguration;
+  UCHAR  bmAttributes;
+  UCHAR  MaxPower;
+} USB_CONFIGURATION_DESCRIPTOR, *PUSB_CONFIGURATION_DESCRIPTOR;
+
+typedef struct libusb_device_descriptor USB_DEVICE_DESCRIPTOR, *PUSB_DEVICE_DESCRIPTOR;
+
+int windows_common_init(struct libusb_context *ctx);
+void windows_common_exit(void);
+
+unsigned long htab_hash(const char *str);
+int windows_clock_gettime(int clk_id, struct timespec *tp);
+
+void windows_clear_transfer_priv(struct usbi_transfer *itransfer);
+int windows_copy_transfer_data(struct usbi_transfer *itransfer, uint32_t io_size);
+struct winfd *windows_get_fd(struct usbi_transfer *transfer);
+void windows_get_overlapped_result(struct usbi_transfer *transfer, struct winfd *pollable_fd, DWORD *io_result, DWORD *io_size);
+
+void windows_handle_callback(struct usbi_transfer *itransfer, uint32_t io_result, uint32_t io_size);
+int windows_handle_events(struct libusb_context *ctx, struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready);
+
+#if defined(ENABLE_LOGGING)
+const char *windows_error_str(DWORD error_code);
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/os/windows_winusb.h

@@ -0,0 +1,833 @@
+/*
+ * Windows backend for libusb 1.0
+ * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
+ * With contributions from Michael Plante, Orin Eman et al.
+ * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
+ * Major code testing contribution by Xiaofan Chen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#pragma once
+
+#include "windows_common.h"
+#include "windows_nt_common.h"
+
+#if defined(_MSC_VER)
+// disable /W4 MSVC warnings that are benign
+#pragma warning(disable:4100)  // unreferenced formal parameter
+#pragma warning(disable:4127)  // conditional expression is constant
+#pragma warning(disable:4201)  // nameless struct/union
+#pragma warning(disable:4214)  // bit field types other than int
+#pragma warning(disable:4996)  // deprecated API calls
+#pragma warning(disable:28159) // more deprecated API calls
+#endif
+
+// Missing from MSVC6 setupapi.h
+#if !defined(SPDRP_ADDRESS)
+#define SPDRP_ADDRESS		28
+#endif
+#if !defined(SPDRP_INSTALL_STATE)
+#define SPDRP_INSTALL_STATE	34
+#endif
+
+#define MAX_CTRL_BUFFER_LENGTH	4096
+#define MAX_USB_DEVICES		256
+#define MAX_USB_STRING_LENGTH	128
+#define MAX_HID_REPORT_SIZE	1024
+#define MAX_HID_DESCRIPTOR_SIZE	256
+#define MAX_GUID_STRING_LENGTH	40
+#define MAX_PATH_LENGTH		128
+#define MAX_KEY_LENGTH		256
+#define LIST_SEPARATOR		';'
+
+// Handle code for HID interface that have been claimed ("dibs")
+#define INTERFACE_CLAIMED	((HANDLE)(intptr_t)0xD1B5)
+// Additional return code for HID operations that completed synchronously
+#define LIBUSB_COMPLETED	(LIBUSB_SUCCESS + 1)
+
+// http://msdn.microsoft.com/en-us/library/ff545978.aspx
+// http://msdn.microsoft.com/en-us/library/ff545972.aspx
+// http://msdn.microsoft.com/en-us/library/ff545982.aspx
+#if !defined(GUID_DEVINTERFACE_USB_HOST_CONTROLLER)
+const GUID GUID_DEVINTERFACE_USB_HOST_CONTROLLER = { 0x3ABF6F2D, 0x71C4, 0x462A, {0x8A, 0x92, 0x1E, 0x68, 0x61, 0xE6, 0xAF, 0x27} };
+#endif
+#if !defined(GUID_DEVINTERFACE_USB_DEVICE)
+const GUID GUID_DEVINTERFACE_USB_DEVICE = { 0xA5DCBF10, 0x6530, 0x11D2, {0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED} };
+#endif
+#if !defined(GUID_DEVINTERFACE_USB_HUB)
+const GUID GUID_DEVINTERFACE_USB_HUB = { 0xF18A0E88, 0xC30C, 0x11D0, {0x88, 0x15, 0x00, 0xA0, 0xC9, 0x06, 0xBE, 0xD8} };
+#endif
+#if !defined(GUID_DEVINTERFACE_LIBUSB0_FILTER)
+const GUID GUID_DEVINTERFACE_LIBUSB0_FILTER = { 0xF9F3FF14, 0xAE21, 0x48A0, {0x8A, 0x25, 0x80, 0x11, 0xA7, 0xA9, 0x31, 0xD9} };
+#endif
+
+
+/*
+ * Multiple USB API backend support
+ */
+#define USB_API_UNSUPPORTED	0
+#define USB_API_HUB		1
+#define USB_API_COMPOSITE	2
+#define USB_API_WINUSBX		3
+#define USB_API_HID		4
+#define USB_API_MAX		4 // hid is dead
+// The following is used to indicate if the HID or composite extra props have already been set.
+#define USB_API_SET		(1 << USB_API_MAX)
+
+// Sub-APIs for WinUSB-like driver APIs (WinUSB, libusbK, libusb-win32 through the libusbK DLL)
+// Must have the same values as the KUSB_DRVID enum from libusbk.h
+#define SUB_API_NOTSET		-1
+#define SUB_API_LIBUSBK		0
+#define SUB_API_LIBUSB0		1
+#define SUB_API_WINUSB		2
+#define SUB_API_MAX		3
+
+#define WINUSBX_DRV_NAMES	{"libusbK", "libusb0", "WinUSB"}
+
+struct windows_usb_api_backend {
+	const uint8_t id;
+	const char *designation;
+	const char **driver_name_list; // Driver name, without .sys, e.g. "usbccgp"
+	const uint8_t nb_driver_names;
+	int (*init)(int sub_api, struct libusb_context *ctx);
+	int (*exit)(int sub_api);
+	int (*open)(int sub_api, struct libusb_device_handle *dev_handle);
+	void (*close)(int sub_api, struct libusb_device_handle *dev_handle);
+	int (*configure_endpoints)(int sub_api, struct libusb_device_handle *dev_handle, int iface);
+	int (*claim_interface)(int sub_api, struct libusb_device_handle *dev_handle, int iface);
+	int (*set_interface_altsetting)(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting);
+	int (*release_interface)(int sub_api, struct libusb_device_handle *dev_handle, int iface);
+	int (*clear_halt)(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint);
+	int (*reset_device)(int sub_api, struct libusb_device_handle *dev_handle);
+	int (*submit_bulk_transfer)(int sub_api, struct usbi_transfer *itransfer);
+	int (*submit_iso_transfer)(int sub_api, struct usbi_transfer *itransfer);
+	int (*submit_control_transfer)(int sub_api, struct usbi_transfer *itransfer);
+	int (*abort_control)(int sub_api, struct usbi_transfer *itransfer);
+	int (*abort_transfers)(int sub_api, struct usbi_transfer *itransfer);
+	int (*copy_transfer_data)(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size);
+};
+
+extern const struct windows_usb_api_backend usb_api_backend[USB_API_MAX];
+
+#define PRINT_UNSUPPORTED_API(fname)				\
+	usbi_dbg("unsupported API call for '"			\
+		#fname "' (unrecognized device driver)");	\
+	return LIBUSB_ERROR_NOT_SUPPORTED;
+
+/*
+ * private structures definition
+ * with inline pseudo constructors/destructors
+ */
+
+#define LIBUSB_DT_HID_SIZE		9
+#define HID_MAX_CONFIG_DESC_SIZE (LIBUSB_DT_CONFIG_SIZE + LIBUSB_DT_INTERFACE_SIZE \
+	+ LIBUSB_DT_HID_SIZE + 2 * LIBUSB_DT_ENDPOINT_SIZE)
+#define HID_MAX_REPORT_SIZE		1024
+#define HID_IN_EP			0x81
+#define HID_OUT_EP			0x02
+#define LIBUSB_REQ_RECIPIENT(request_type)	((request_type) & 0x1F)
+#define LIBUSB_REQ_TYPE(request_type)		((request_type) & (0x03 << 5))
+#define LIBUSB_REQ_IN(request_type)		((request_type) & LIBUSB_ENDPOINT_IN)
+#define LIBUSB_REQ_OUT(request_type)		(!LIBUSB_REQ_IN(request_type))
+
+// The following are used for HID reports IOCTLs
+#define HID_CTL_CODE(id) \
+	CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_NEITHER, FILE_ANY_ACCESS)
+#define HID_BUFFER_CTL_CODE(id) \
+	CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_BUFFERED, FILE_ANY_ACCESS)
+#define HID_IN_CTL_CODE_HIDHACK(id) \
+	CTL_CODE (FILE_DEVICE_KEYBOARD, (id), METHOD_IN_DIRECT, FILE_ANY_ACCESS)
+
+#define IOCTL_HID_GET_FEATURE		HID_OUT_CTL_CODE(100)
+#define IOCTL_HID_GET_INPUT_REPORT	HID_OUT_CTL_CODE(104)
+#define IOCTL_HID_SET_FEATURE		HID_IN_CTL_CODE_HIDHACK(100)
+#define IOCTL_HID_SET_OUTPUT_REPORT	HID_IN_CTL_CODE_HIDHACK(101)
+
+enum libusb_hid_request_type {
+	HID_REQ_GET_REPORT = 0x01,
+	HID_REQ_GET_IDLE = 0x02,
+	HID_REQ_GET_PROTOCOL = 0x03,
+	HID_REQ_SET_REPORT = 0x09,
+	HID_REQ_SET_IDLE = 0x0A,
+	HID_REQ_SET_PROTOCOL = 0x0B
+};
+
+enum libusb_hid_report_type {
+	HID_REPORT_TYPE_INPUT = 0x01,
+	HID_REPORT_TYPE_OUTPUT = 0x02,
+	HID_REPORT_TYPE_FEATURE = 0x03
+};
+
+struct hid_device_priv {
+	uint16_t vid;
+	uint16_t pid;
+	uint8_t config;
+	uint8_t nb_interfaces;
+	bool uses_report_ids[3]; // input, ouptput, feature
+	uint16_t input_report_size;
+	uint16_t output_report_size;
+	uint16_t feature_report_size;
+	WCHAR string[3][MAX_USB_STRING_LENGTH];
+	uint8_t string_index[3]; // man, prod, ser
+};
+
+struct windows_device_priv {
+	uint8_t depth; // distance to HCD
+	uint8_t port;  // port number on the hub
+	uint8_t active_config;
+	struct windows_usb_api_backend const *apib;
+	char *path;  // device interface path
+	int sub_api; // for WinUSB-like APIs
+	struct {
+		char *path; // each interface needs a device interface path,
+		struct windows_usb_api_backend const *apib; // an API backend (multiple drivers support),
+		int sub_api;
+		int8_t nb_endpoints; // and a set of endpoint addresses (USB_MAXENDPOINTS)
+		uint8_t *endpoint;
+		bool restricted_functionality;  // indicates if the interface functionality is restricted
+                                                // by Windows (eg. HID keyboards or mice cannot do R/W)
+	} usb_interface[USB_MAXINTERFACES];
+	struct hid_device_priv *hid;
+	USB_DEVICE_DESCRIPTOR dev_descriptor;
+	unsigned char **config_descriptor; // list of pointers to the cached config descriptors
+};
+
+static inline struct windows_device_priv *_device_priv(struct libusb_device *dev)
+{
+	return (struct windows_device_priv *)dev->os_priv;
+}
+
+static inline struct windows_device_priv *windows_device_priv_init(struct libusb_device *dev)
+{
+	struct windows_device_priv *p = _device_priv(dev);
+	int i;
+
+	p->apib = &usb_api_backend[USB_API_UNSUPPORTED];
+	p->sub_api = SUB_API_NOTSET;
+	for (i = 0; i < USB_MAXINTERFACES; i++) {
+		p->usb_interface[i].apib = &usb_api_backend[USB_API_UNSUPPORTED];
+		p->usb_interface[i].sub_api = SUB_API_NOTSET;
+	}
+
+	return p;
+}
+
+static inline void windows_device_priv_release(struct libusb_device *dev)
+{
+	struct windows_device_priv *p = _device_priv(dev);
+	int i;
+
+	free(p->path);
+	if ((dev->num_configurations > 0) && (p->config_descriptor != NULL)) {
+		for (i = 0; i < dev->num_configurations; i++)
+			free(p->config_descriptor[i]);
+	}
+	free(p->config_descriptor);
+	free(p->hid);
+	for (i = 0; i < USB_MAXINTERFACES; i++) {
+		free(p->usb_interface[i].path);
+		free(p->usb_interface[i].endpoint);
+	}
+}
+
+struct interface_handle_t {
+	HANDLE dev_handle; // WinUSB needs an extra handle for the file
+	HANDLE api_handle; // used by the API to communicate with the device
+};
+
+struct windows_device_handle_priv {
+	int active_interface;
+	struct interface_handle_t interface_handle[USB_MAXINTERFACES];
+	int autoclaim_count[USB_MAXINTERFACES]; // For auto-release
+};
+
+static inline struct windows_device_handle_priv *_device_handle_priv(
+	struct libusb_device_handle *handle)
+{
+	return (struct windows_device_handle_priv *)handle->os_priv;
+}
+
+// used for async polling functions
+struct windows_transfer_priv {
+	struct winfd pollable_fd;
+	uint8_t interface_number;
+	uint8_t *hid_buffer; // 1 byte extended data buffer, required for HID
+	uint8_t *hid_dest;   // transfer buffer destination, required for HID
+	size_t hid_expected_size;
+};
+
+// used to match a device driver (including filter drivers) against a supported API
+struct driver_lookup {
+	char list[MAX_KEY_LENGTH + 1]; // REG_MULTI_SZ list of services (driver) names
+	const DWORD reg_prop;          // SPDRP registry key to use to retrieve list
+	const char* designation;       // internal designation (for debug output)
+};
+
+/* OLE32 dependency */
+DLL_DECLARE_HANDLE(OLE32);
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, HRESULT, p, CLSIDFromString, (LPCOLESTR, LPCLSID));
+
+/* Kernel32 dependencies */
+DLL_DECLARE_HANDLE(Kernel32);
+/* This call is only available from XP SP2 */
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, IsWow64Process, (HANDLE, PBOOL));
+
+/* SetupAPI dependencies */
+DLL_DECLARE_HANDLE(SetupAPI);
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, HDEVINFO, p, SetupDiGetClassDevsA, (const GUID*, PCSTR, HWND, DWORD));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiEnumDeviceInfo, (HDEVINFO, DWORD, PSP_DEVINFO_DATA));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiEnumDeviceInterfaces, (HDEVINFO, PSP_DEVINFO_DATA,
+			const GUID*, DWORD, PSP_DEVICE_INTERFACE_DATA));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiGetDeviceInterfaceDetailA, (HDEVINFO, PSP_DEVICE_INTERFACE_DATA,
+			PSP_DEVICE_INTERFACE_DETAIL_DATA_A, DWORD, PDWORD, PSP_DEVINFO_DATA));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiDestroyDeviceInfoList, (HDEVINFO));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, HKEY, p, SetupDiOpenDevRegKey, (HDEVINFO, PSP_DEVINFO_DATA, DWORD, DWORD, DWORD, REGSAM));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, BOOL, p, SetupDiGetDeviceRegistryPropertyA, (HDEVINFO,
+			PSP_DEVINFO_DATA, DWORD, PDWORD, PBYTE, DWORD, PDWORD));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, HKEY, p, SetupDiOpenDeviceInterfaceRegKey, (HDEVINFO, PSP_DEVICE_INTERFACE_DATA, DWORD, DWORD));
+
+/* AdvAPI32 dependencies */
+DLL_DECLARE_HANDLE(AdvAPI32);
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, LONG, p, RegQueryValueExW, (HKEY, LPCWSTR, LPDWORD, LPDWORD, LPBYTE, LPDWORD));
+DLL_DECLARE_FUNC_PREFIXED(WINAPI, LONG, p, RegCloseKey, (HKEY));
+
+/*
+ * Windows DDK API definitions. Most of it copied from MinGW's includes
+ */
+typedef DWORD DEVNODE, DEVINST;
+typedef DEVNODE *PDEVNODE, *PDEVINST;
+typedef DWORD RETURN_TYPE;
+typedef RETURN_TYPE CONFIGRET;
+
+#define CR_SUCCESS				0x00000000
+#define CR_NO_SUCH_DEVNODE			0x0000000D
+
+#define USB_DEVICE_DESCRIPTOR_TYPE		LIBUSB_DT_DEVICE
+#define USB_CONFIGURATION_DESCRIPTOR_TYPE	LIBUSB_DT_CONFIG
+#define USB_STRING_DESCRIPTOR_TYPE		LIBUSB_DT_STRING
+#define USB_INTERFACE_DESCRIPTOR_TYPE		LIBUSB_DT_INTERFACE
+#define USB_ENDPOINT_DESCRIPTOR_TYPE		LIBUSB_DT_ENDPOINT
+
+#define USB_REQUEST_GET_STATUS			LIBUSB_REQUEST_GET_STATUS
+#define USB_REQUEST_CLEAR_FEATURE		LIBUSB_REQUEST_CLEAR_FEATURE
+#define USB_REQUEST_SET_FEATURE			LIBUSB_REQUEST_SET_FEATURE
+#define USB_REQUEST_SET_ADDRESS			LIBUSB_REQUEST_SET_ADDRESS
+#define USB_REQUEST_GET_DESCRIPTOR		LIBUSB_REQUEST_GET_DESCRIPTOR
+#define USB_REQUEST_SET_DESCRIPTOR		LIBUSB_REQUEST_SET_DESCRIPTOR
+#define USB_REQUEST_GET_CONFIGURATION		LIBUSB_REQUEST_GET_CONFIGURATION
+#define USB_REQUEST_SET_CONFIGURATION		LIBUSB_REQUEST_SET_CONFIGURATION
+#define USB_REQUEST_GET_INTERFACE		LIBUSB_REQUEST_GET_INTERFACE
+#define USB_REQUEST_SET_INTERFACE		LIBUSB_REQUEST_SET_INTERFACE
+#define USB_REQUEST_SYNC_FRAME			LIBUSB_REQUEST_SYNCH_FRAME
+
+#define USB_GET_NODE_INFORMATION		258
+#define USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION	260
+#define USB_GET_NODE_CONNECTION_NAME		261
+#define USB_GET_HUB_CAPABILITIES		271
+#if !defined(USB_GET_NODE_CONNECTION_INFORMATION_EX)
+#define USB_GET_NODE_CONNECTION_INFORMATION_EX	274
+#endif
+#if !defined(USB_GET_HUB_CAPABILITIES_EX)
+#define USB_GET_HUB_CAPABILITIES_EX		276
+#endif
+#if !defined(USB_GET_NODE_CONNECTION_INFORMATION_EX_V2)
+#define USB_GET_NODE_CONNECTION_INFORMATION_EX_V2	279
+#endif
+
+#ifndef METHOD_BUFFERED
+#define METHOD_BUFFERED				0
+#endif
+#ifndef FILE_ANY_ACCESS
+#define FILE_ANY_ACCESS				0x00000000
+#endif
+#ifndef FILE_DEVICE_UNKNOWN
+#define FILE_DEVICE_UNKNOWN			0x00000022
+#endif
+#ifndef FILE_DEVICE_USB
+#define FILE_DEVICE_USB				FILE_DEVICE_UNKNOWN
+#endif
+
+#ifndef CTL_CODE
+#define CTL_CODE(DeviceType, Function, Method, Access) \
+	(((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))
+#endif
+
+typedef enum USB_CONNECTION_STATUS {
+	NoDeviceConnected,
+	DeviceConnected,
+	DeviceFailedEnumeration,
+	DeviceGeneralFailure,
+	DeviceCausedOvercurrent,
+	DeviceNotEnoughPower,
+	DeviceNotEnoughBandwidth,
+	DeviceHubNestedTooDeeply,
+	DeviceInLegacyHub
+} USB_CONNECTION_STATUS, *PUSB_CONNECTION_STATUS;
+
+typedef enum USB_HUB_NODE {
+	UsbHub,
+	UsbMIParent
+} USB_HUB_NODE;
+
+/* Cfgmgr32.dll interface */
+DLL_DECLARE_HANDLE(Cfgmgr32);
+DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Parent, (PDEVINST, DEVINST, ULONG));
+DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Child, (PDEVINST, DEVINST, ULONG));
+DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Sibling, (PDEVINST, DEVINST, ULONG));
+DLL_DECLARE_FUNC(WINAPI, CONFIGRET, CM_Get_Device_IDA, (DEVINST, PCHAR, ULONG, ULONG));
+
+#define IOCTL_USB_GET_HUB_CAPABILITIES_EX \
+	CTL_CODE( FILE_DEVICE_USB, USB_GET_HUB_CAPABILITIES_EX, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_HUB_CAPABILITIES \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_HUB_CAPABILITIES, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_ROOT_HUB_NAME \
+	CTL_CODE(FILE_DEVICE_USB, HCD_GET_ROOT_HUB_NAME, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_NODE_INFORMATION \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_INFORMATION, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_INFORMATION_EX, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX_V2 \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_INFORMATION_EX_V2, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_NODE_CONNECTION_ATTRIBUTES \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_ATTRIBUTES, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+#define IOCTL_USB_GET_NODE_CONNECTION_NAME \
+	CTL_CODE(FILE_DEVICE_USB, USB_GET_NODE_CONNECTION_NAME, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+// Most of the structures below need to be packed
+#pragma pack(push, 1)
+
+typedef struct USB_INTERFACE_DESCRIPTOR {
+	UCHAR bLength;
+	UCHAR bDescriptorType;
+	UCHAR bInterfaceNumber;
+	UCHAR bAlternateSetting;
+	UCHAR bNumEndpoints;
+	UCHAR bInterfaceClass;
+	UCHAR bInterfaceSubClass;
+	UCHAR bInterfaceProtocol;
+	UCHAR iInterface;
+} USB_INTERFACE_DESCRIPTOR, *PUSB_INTERFACE_DESCRIPTOR;
+
+typedef struct USB_CONFIGURATION_DESCRIPTOR_SHORT {
+	struct {
+		ULONG ConnectionIndex;
+		struct {
+			UCHAR bmRequest;
+			UCHAR bRequest;
+			USHORT wValue;
+			USHORT wIndex;
+			USHORT wLength;
+		} SetupPacket;
+	} req;
+	USB_CONFIGURATION_DESCRIPTOR data;
+} USB_CONFIGURATION_DESCRIPTOR_SHORT;
+
+typedef struct USB_ENDPOINT_DESCRIPTOR {
+	UCHAR bLength;
+	UCHAR bDescriptorType;
+	UCHAR bEndpointAddress;
+	UCHAR bmAttributes;
+	USHORT wMaxPacketSize;
+	UCHAR bInterval;
+} USB_ENDPOINT_DESCRIPTOR, *PUSB_ENDPOINT_DESCRIPTOR;
+
+typedef struct USB_DESCRIPTOR_REQUEST {
+	ULONG ConnectionIndex;
+	struct {
+		UCHAR bmRequest;
+		UCHAR bRequest;
+		USHORT wValue;
+		USHORT wIndex;
+		USHORT wLength;
+	} SetupPacket;
+//	UCHAR Data[0];
+} USB_DESCRIPTOR_REQUEST, *PUSB_DESCRIPTOR_REQUEST;
+
+typedef struct USB_HUB_DESCRIPTOR {
+	UCHAR bDescriptorLength;
+	UCHAR bDescriptorType;
+	UCHAR bNumberOfPorts;
+	USHORT wHubCharacteristics;
+	UCHAR bPowerOnToPowerGood;
+	UCHAR bHubControlCurrent;
+	UCHAR bRemoveAndPowerMask[64];
+} USB_HUB_DESCRIPTOR, *PUSB_HUB_DESCRIPTOR;
+
+typedef struct USB_ROOT_HUB_NAME {
+	ULONG ActualLength;
+	WCHAR RootHubName[1];
+} USB_ROOT_HUB_NAME, *PUSB_ROOT_HUB_NAME;
+
+typedef struct USB_ROOT_HUB_NAME_FIXED {
+	ULONG ActualLength;
+	WCHAR RootHubName[MAX_PATH_LENGTH];
+} USB_ROOT_HUB_NAME_FIXED;
+
+typedef struct USB_NODE_CONNECTION_NAME {
+	ULONG ConnectionIndex;
+	ULONG ActualLength;
+	WCHAR NodeName[1];
+} USB_NODE_CONNECTION_NAME, *PUSB_NODE_CONNECTION_NAME;
+
+typedef struct USB_NODE_CONNECTION_NAME_FIXED {
+	ULONG ConnectionIndex;
+	ULONG ActualLength;
+	WCHAR NodeName[MAX_PATH_LENGTH];
+} USB_NODE_CONNECTION_NAME_FIXED;
+
+typedef struct USB_HUB_NAME_FIXED {
+	union {
+		USB_ROOT_HUB_NAME_FIXED root;
+		USB_NODE_CONNECTION_NAME_FIXED node;
+	} u;
+} USB_HUB_NAME_FIXED;
+
+typedef struct USB_HUB_INFORMATION {
+	USB_HUB_DESCRIPTOR HubDescriptor;
+	BOOLEAN HubIsBusPowered;
+} USB_HUB_INFORMATION, *PUSB_HUB_INFORMATION;
+
+typedef struct USB_MI_PARENT_INFORMATION {
+	ULONG NumberOfInterfaces;
+} USB_MI_PARENT_INFORMATION, *PUSB_MI_PARENT_INFORMATION;
+
+typedef struct USB_NODE_INFORMATION {
+	USB_HUB_NODE NodeType;
+	union {
+		USB_HUB_INFORMATION HubInformation;
+		USB_MI_PARENT_INFORMATION MiParentInformation;
+	} u;
+} USB_NODE_INFORMATION, *PUSB_NODE_INFORMATION;
+
+typedef struct USB_PIPE_INFO {
+	USB_ENDPOINT_DESCRIPTOR EndpointDescriptor;
+	ULONG ScheduleOffset;
+} USB_PIPE_INFO, *PUSB_PIPE_INFO;
+
+typedef struct USB_NODE_CONNECTION_INFORMATION_EX {
+	ULONG ConnectionIndex;
+	USB_DEVICE_DESCRIPTOR DeviceDescriptor;
+	UCHAR CurrentConfigurationValue;
+	UCHAR Speed;
+	BOOLEAN DeviceIsHub;
+	USHORT DeviceAddress;
+	ULONG NumberOfOpenPipes;
+	USB_CONNECTION_STATUS ConnectionStatus;
+//	USB_PIPE_INFO PipeList[0];
+} USB_NODE_CONNECTION_INFORMATION_EX, *PUSB_NODE_CONNECTION_INFORMATION_EX;
+
+typedef union _USB_PROTOCOLS {
+	ULONG ul;
+	struct {
+		ULONG Usb110:1;
+		ULONG Usb200:1;
+		ULONG Usb300:1;
+		ULONG ReservedMBZ:29;
+	};
+} USB_PROTOCOLS, *PUSB_PROTOCOLS;
+
+typedef union _USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS {
+	ULONG ul;
+	struct {
+		ULONG DeviceIsOperatingAtSuperSpeedOrHigher:1;
+		ULONG DeviceIsSuperSpeedCapableOrHigher:1;
+		ULONG ReservedMBZ:30;
+	};
+} USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS, *PUSB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS;
+
+typedef struct _USB_NODE_CONNECTION_INFORMATION_EX_V2 {
+	ULONG ConnectionIndex;
+	ULONG Length;
+	USB_PROTOCOLS SupportedUsbProtocols;
+	USB_NODE_CONNECTION_INFORMATION_EX_V2_FLAGS Flags;
+} USB_NODE_CONNECTION_INFORMATION_EX_V2, *PUSB_NODE_CONNECTION_INFORMATION_EX_V2;
+
+typedef struct USB_HUB_CAP_FLAGS {
+	ULONG HubIsHighSpeedCapable:1;
+	ULONG HubIsHighSpeed:1;
+	ULONG HubIsMultiTtCapable:1;
+	ULONG HubIsMultiTt:1;
+	ULONG HubIsRoot:1;
+	ULONG HubIsArmedWakeOnConnect:1;
+	ULONG ReservedMBZ:26;
+} USB_HUB_CAP_FLAGS, *PUSB_HUB_CAP_FLAGS;
+
+typedef struct USB_HUB_CAPABILITIES {
+	ULONG HubIs2xCapable:1;
+} USB_HUB_CAPABILITIES, *PUSB_HUB_CAPABILITIES;
+
+typedef struct USB_HUB_CAPABILITIES_EX {
+	USB_HUB_CAP_FLAGS CapabilityFlags;
+} USB_HUB_CAPABILITIES_EX, *PUSB_HUB_CAPABILITIES_EX;
+
+#pragma pack(pop)
+
+/* winusb.dll interface */
+
+#define SHORT_PACKET_TERMINATE	0x01
+#define AUTO_CLEAR_STALL	0x02
+#define PIPE_TRANSFER_TIMEOUT	0x03
+#define IGNORE_SHORT_PACKETS	0x04
+#define ALLOW_PARTIAL_READS	0x05
+#define AUTO_FLUSH		0x06
+#define RAW_IO			0x07
+#define MAXIMUM_TRANSFER_SIZE	0x08
+#define AUTO_SUSPEND		0x81
+#define SUSPEND_DELAY		0x83
+#define DEVICE_SPEED		0x01
+#define LowSpeed		0x01
+#define FullSpeed		0x02
+#define HighSpeed		0x03
+
+typedef enum USBD_PIPE_TYPE {
+	UsbdPipeTypeControl,
+	UsbdPipeTypeIsochronous,
+	UsbdPipeTypeBulk,
+	UsbdPipeTypeInterrupt
+} USBD_PIPE_TYPE;
+
+typedef struct {
+	USBD_PIPE_TYPE PipeType;
+	UCHAR PipeId;
+	USHORT MaximumPacketSize;
+	UCHAR Interval;
+} WINUSB_PIPE_INFORMATION, *PWINUSB_PIPE_INFORMATION;
+
+#pragma pack(1)
+typedef struct {
+	UCHAR request_type;
+	UCHAR request;
+	USHORT value;
+	USHORT index;
+	USHORT length;
+} WINUSB_SETUP_PACKET, *PWINUSB_SETUP_PACKET;
+#pragma pack()
+
+typedef void *WINUSB_INTERFACE_HANDLE, *PWINUSB_INTERFACE_HANDLE;
+
+typedef BOOL (WINAPI *WinUsb_AbortPipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID
+);
+typedef BOOL (WINAPI *WinUsb_ControlTransfer_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	WINUSB_SETUP_PACKET SetupPacket,
+	PUCHAR Buffer,
+	ULONG BufferLength,
+	PULONG LengthTransferred,
+	LPOVERLAPPED Overlapped
+);
+typedef BOOL (WINAPI *WinUsb_FlushPipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID
+);
+typedef BOOL (WINAPI *WinUsb_Free_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle
+);
+typedef BOOL (WINAPI *WinUsb_GetAssociatedInterface_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR AssociatedInterfaceIndex,
+	PWINUSB_INTERFACE_HANDLE AssociatedInterfaceHandle
+);
+typedef BOOL (WINAPI *WinUsb_GetCurrentAlternateSetting_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	PUCHAR AlternateSetting
+);
+typedef BOOL (WINAPI *WinUsb_GetDescriptor_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR DescriptorType,
+	UCHAR Index,
+	USHORT LanguageID,
+	PUCHAR Buffer,
+	ULONG BufferLength,
+	PULONG LengthTransferred
+);
+typedef BOOL (WINAPI *WinUsb_GetOverlappedResult_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	LPOVERLAPPED lpOverlapped,
+	LPDWORD lpNumberOfBytesTransferred,
+	BOOL bWait
+);
+typedef BOOL (WINAPI *WinUsb_GetPipePolicy_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID,
+	ULONG PolicyType,
+	PULONG ValueLength,
+	PVOID Value
+);
+typedef BOOL (WINAPI *WinUsb_GetPowerPolicy_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	ULONG PolicyType,
+	PULONG ValueLength,
+	PVOID Value
+);
+typedef BOOL (WINAPI *WinUsb_Initialize_t)(
+	HANDLE DeviceHandle,
+	PWINUSB_INTERFACE_HANDLE InterfaceHandle
+);
+typedef BOOL (WINAPI *WinUsb_QueryDeviceInformation_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	ULONG InformationType,
+	PULONG BufferLength,
+	PVOID Buffer
+);
+typedef BOOL (WINAPI *WinUsb_QueryInterfaceSettings_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR AlternateSettingNumber,
+	PUSB_INTERFACE_DESCRIPTOR UsbAltInterfaceDescriptor
+);
+typedef BOOL (WINAPI *WinUsb_QueryPipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR AlternateInterfaceNumber,
+	UCHAR PipeIndex,
+	PWINUSB_PIPE_INFORMATION PipeInformation
+);
+typedef BOOL (WINAPI *WinUsb_ReadPipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID,
+	PUCHAR Buffer,
+	ULONG BufferLength,
+	PULONG LengthTransferred,
+	LPOVERLAPPED Overlapped
+);
+typedef BOOL (WINAPI *WinUsb_ResetPipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID
+);
+typedef BOOL (WINAPI *WinUsb_SetCurrentAlternateSetting_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR AlternateSetting
+);
+typedef BOOL (WINAPI *WinUsb_SetPipePolicy_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID,
+	ULONG PolicyType,
+	ULONG ValueLength,
+	PVOID Value
+);
+typedef BOOL (WINAPI *WinUsb_SetPowerPolicy_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	ULONG PolicyType,
+	ULONG ValueLength,
+	PVOID Value
+);
+typedef BOOL (WINAPI *WinUsb_WritePipe_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle,
+	UCHAR PipeID,
+	PUCHAR Buffer,
+	ULONG BufferLength,
+	PULONG LengthTransferred,
+	LPOVERLAPPED Overlapped
+);
+typedef BOOL (WINAPI *WinUsb_ResetDevice_t)(
+	WINUSB_INTERFACE_HANDLE InterfaceHandle
+);
+
+/* /!\ These must match the ones from the official libusbk.h */
+typedef enum _KUSB_FNID {
+	KUSB_FNID_Init,
+	KUSB_FNID_Free,
+	KUSB_FNID_ClaimInterface,
+	KUSB_FNID_ReleaseInterface,
+	KUSB_FNID_SetAltInterface,
+	KUSB_FNID_GetAltInterface,
+	KUSB_FNID_GetDescriptor,
+	KUSB_FNID_ControlTransfer,
+	KUSB_FNID_SetPowerPolicy,
+	KUSB_FNID_GetPowerPolicy,
+	KUSB_FNID_SetConfiguration,
+	KUSB_FNID_GetConfiguration,
+	KUSB_FNID_ResetDevice,
+	KUSB_FNID_Initialize,
+	KUSB_FNID_SelectInterface,
+	KUSB_FNID_GetAssociatedInterface,
+	KUSB_FNID_Clone,
+	KUSB_FNID_QueryInterfaceSettings,
+	KUSB_FNID_QueryDeviceInformation,
+	KUSB_FNID_SetCurrentAlternateSetting,
+	KUSB_FNID_GetCurrentAlternateSetting,
+	KUSB_FNID_QueryPipe,
+	KUSB_FNID_SetPipePolicy,
+	KUSB_FNID_GetPipePolicy,
+	KUSB_FNID_ReadPipe,
+	KUSB_FNID_WritePipe,
+	KUSB_FNID_ResetPipe,
+	KUSB_FNID_AbortPipe,
+	KUSB_FNID_FlushPipe,
+	KUSB_FNID_IsoReadPipe,
+	KUSB_FNID_IsoWritePipe,
+	KUSB_FNID_GetCurrentFrameNumber,
+	KUSB_FNID_GetOverlappedResult,
+	KUSB_FNID_GetProperty,
+	KUSB_FNID_COUNT,
+} KUSB_FNID;
+
+typedef struct _KLIB_VERSION {
+	INT Major;
+	INT Minor;
+	INT Micro;
+	INT Nano;
+} KLIB_VERSION;
+typedef KLIB_VERSION* PKLIB_VERSION;
+
+typedef BOOL (WINAPI *LibK_GetProcAddress_t)(
+	PVOID *ProcAddress,
+	ULONG DriverID,
+	ULONG FunctionID
+);
+
+typedef VOID (WINAPI *LibK_GetVersion_t)(
+	PKLIB_VERSION Version
+);
+
+struct winusb_interface {
+	bool initialized;
+	WinUsb_AbortPipe_t AbortPipe;
+	WinUsb_ControlTransfer_t ControlTransfer;
+	WinUsb_FlushPipe_t FlushPipe;
+	WinUsb_Free_t Free;
+	WinUsb_GetAssociatedInterface_t GetAssociatedInterface;
+	WinUsb_GetCurrentAlternateSetting_t GetCurrentAlternateSetting;
+	WinUsb_GetDescriptor_t GetDescriptor;
+	WinUsb_GetOverlappedResult_t GetOverlappedResult;
+	WinUsb_GetPipePolicy_t GetPipePolicy;
+	WinUsb_GetPowerPolicy_t GetPowerPolicy;
+	WinUsb_Initialize_t Initialize;
+	WinUsb_QueryDeviceInformation_t QueryDeviceInformation;
+	WinUsb_QueryInterfaceSettings_t QueryInterfaceSettings;
+	WinUsb_QueryPipe_t QueryPipe;
+	WinUsb_ReadPipe_t ReadPipe;
+	WinUsb_ResetPipe_t ResetPipe;
+	WinUsb_SetCurrentAlternateSetting_t SetCurrentAlternateSetting;
+	WinUsb_SetPipePolicy_t SetPipePolicy;
+	WinUsb_SetPowerPolicy_t SetPowerPolicy;
+	WinUsb_WritePipe_t WritePipe;
+	WinUsb_ResetDevice_t ResetDevice;
+};
+
+/* hid.dll interface */
+
+typedef USHORT USAGE;

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/strerror.c

@@ -0,0 +1,202 @@
+/*
+ * libusb strerror code
+ * Copyright © 2013 Hans de Goede <hdegoede@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined(HAVE_STRINGS_H)
+#include <strings.h>
+#endif
+
+#include "libusbi.h"
+
+#if defined(_MSC_VER)
+#define strncasecmp _strnicmp
+#endif
+
+static size_t usbi_locale = 0;
+
+/** \ingroup libusb_misc
+ * How to add a new \ref libusb_strerror() translation:
+ * <ol>
+ * <li> Download the latest \c strerror.c from:<br>
+ *      https://raw.github.com/libusb/libusb/master/libusb/sterror.c </li>
+ * <li> Open the file in an UTF-8 capable editor </li>
+ * <li> Add the 2 letter <a href="http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes">ISO 639-1</a>
+ *      code for your locale at the end of \c usbi_locale_supported[]<br>
+ *    Eg. for Chinese, you would add "zh" so that:
+ *    \code... usbi_locale_supported[] = { "en", "nl", "fr" };\endcode
+ *    becomes:
+ *    \code... usbi_locale_supported[] = { "en", "nl", "fr", "zh" };\endcode </li>
+ * <li> Copy the <tt>{ / * English (en) * / ... }</tt> section and add it at the end of \c usbi_localized_errors<br>
+ *    Eg. for Chinese, the last section of \c usbi_localized_errors could look like:
+ *    \code
+ *     }, { / * Chinese (zh) * /
+ *         "Success",
+ *         ...
+ *         "Other error",
+ *     }
+ * };\endcode </li>
+ * <li> Translate each of the English messages from the section you copied into your language </li>
+ * <li> Save the file (in UTF-8 format) and send it to \c libusb-devel\@lists.sourceforge.net </li>
+ * </ol>
+ */
+
+static const char* usbi_locale_supported[] = { "en", "nl", "fr", "ru" };
+static const char* usbi_localized_errors[ARRAYSIZE(usbi_locale_supported)][LIBUSB_ERROR_COUNT] = {
+	{ /* English (en) */
+		"Success",
+		"Input/Output Error",
+		"Invalid parameter",
+		"Access denied (insufficient permissions)",
+		"No such device (it may have been disconnected)",
+		"Entity not found",
+		"Resource busy",
+		"Operation timed out",
+		"Overflow",
+		"Pipe error",
+		"System call interrupted (perhaps due to signal)",
+		"Insufficient memory",
+		"Operation not supported or unimplemented on this platform",
+		"Other error",
+	}, { /* Dutch (nl) */
+		"Gelukt",
+		"Invoer-/uitvoerfout",
+		"Ongeldig argument",
+		"Toegang geweigerd (onvoldoende toegangsrechten)",
+		"Apparaat bestaat niet (verbinding met apparaat verbroken?)",
+		"Niet gevonden",
+		"Apparaat of hulpbron is bezig",
+		"Bewerking verlopen",
+		"Waarde is te groot",
+		"Gebroken pijp",
+		"Onderbroken systeemaanroep",
+		"Onvoldoende geheugen beschikbaar",
+		"Bewerking wordt niet ondersteund",
+		"Andere fout",
+	}, { /* French (fr) */
+		"Succès",
+		"Erreur d'entrée/sortie",
+		"Paramètre invalide",
+		"Accès refusé (permissions insuffisantes)",
+		"Périphérique introuvable (peut-être déconnecté)",
+		"Elément introuvable",
+		"Resource déjà occupée",
+		"Operation expirée",
+		"Débordement",
+		"Erreur de pipe",
+		"Appel système abandonné (peut-être à cause d’un signal)",
+		"Mémoire insuffisante",
+		"Opération non supportée or non implémentée sur cette plateforme",
+		"Autre erreur",
+	}, { /* Russian (ru) */
+		"Успех",
+		"Ошибка ввода/вывода",
+		"Неверный параметр",
+		"Доступ запрещён (не хватает прав)",
+		"Устройство отсутствует (возможно, оно было отсоединено)",
+		"Элемент не найден",
+		"Ресурс занят",
+		"Истекло время ожидания операции",
+		"Переполнение",
+		"Ошибка канала",
+		"Системный вызов прерван (возможно, сигналом)",
+		"Память исчерпана",
+		"Операция не поддерживается данной платформой",
+		"Неизвестная ошибка"
+	}
+};
+
+/** \ingroup libusb_misc
+ * Set the language, and only the language, not the encoding! used for
+ * translatable libusb messages.
+ *
+ * This takes a locale string in the default setlocale format: lang[-region]
+ * or lang[_country_region][.codeset]. Only the lang part of the string is
+ * used, and only 2 letter ISO 639-1 codes are accepted for it, such as "de".
+ * The optional region, country_region or codeset parts are ignored. This
+ * means that functions which return translatable strings will NOT honor the
+ * specified encoding. 
+ * All strings returned are encoded as UTF-8 strings.
+ *
+ * If libusb_setlocale() is not called, all messages will be in English.
+ *
+ * The following functions return translatable strings: libusb_strerror().
+ * Note that the libusb log messages controlled through libusb_set_debug()
+ * are not translated, they are always in English.
+ *
+ * For POSIX UTF-8 environments if you want libusb to follow the standard
+ * locale settings, call libusb_setlocale(setlocale(LC_MESSAGES, NULL)),
+ * after your app has done its locale setup.
+ *
+ * \param locale locale-string in the form of lang[_country_region][.codeset]
+ * or lang[-region], where lang is a 2 letter ISO 639-1 code
+ * \returns LIBUSB_SUCCESS on success
+ * \returns LIBUSB_ERROR_INVALID_PARAM if the locale doesn't meet the requirements
+ * \returns LIBUSB_ERROR_NOT_FOUND if the requested language is not supported
+ * \returns a LIBUSB_ERROR code on other errors
+ */
+
+int API_EXPORTED libusb_setlocale(const char *locale)
+{
+	size_t i;
+
+	if ( (locale == NULL) || (strlen(locale) < 2)
+	  || ((strlen(locale) > 2) && (locale[2] != '-') && (locale[2] != '_') && (locale[2] != '.')) )
+		return LIBUSB_ERROR_INVALID_PARAM;
+
+	for (i=0; i<ARRAYSIZE(usbi_locale_supported); i++) {
+		if (strncasecmp(usbi_locale_supported[i], locale, 2) == 0)
+			break;
+	}
+	if (i >= ARRAYSIZE(usbi_locale_supported)) {
+		return LIBUSB_ERROR_NOT_FOUND;
+	}
+
+	usbi_locale = i;
+
+	return LIBUSB_SUCCESS;
+}
+
+/** \ingroup libusb_misc
+ * Returns a constant string with a short description of the given error code,
+ * this description is intended for displaying to the end user and will be in
+ * the language set by libusb_setlocale().
+ *
+ * The returned string is encoded in UTF-8.
+ *
+ * The messages always start with a capital letter and end without any dot.
+ * The caller must not free() the returned string.
+ *
+ * \param errcode the error code whose description is desired
+ * \returns a short description of the error code in UTF-8 encoding
+ */
+DEFAULT_VISIBILITY const char* LIBUSB_CALL libusb_strerror(enum libusb_error errcode)
+{
+	int errcode_index = -errcode;
+
+	if ((errcode_index < 0) || (errcode_index >= LIBUSB_ERROR_COUNT)) {
+		/* "Other Error", which should always be our last message, is returned */
+		errcode_index = LIBUSB_ERROR_COUNT - 1;
+	}
+
+	return usbi_localized_errors[usbi_locale][errcode_index];
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/sync.c

@@ -0,0 +1,421 @@
+/*
+ * Synchronous I/O functions for libusb
+ * Copyright © 2007-2008 Daniel Drake <dsd@gentoo.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libusbi.h"
+
+/**
+ * @defgroup libusb_syncio Synchronous device I/O
+ *
+ * This page documents libusb's synchronous (blocking) API for USB device I/O.
+ * This interface is easy to use but has some limitations. More advanced users
+ * may wish to consider using the \ref libusb_asyncio "asynchronous I/O API" instead.
+ */
+
+static void LIBUSB_CALL sync_transfer_cb(struct libusb_transfer *transfer)
+{
+	int *completed = transfer->user_data;
+	*completed = 1;
+	usbi_dbg("actual_length=%d", transfer->actual_length);
+	/* caller interprets result and frees transfer */
+}
+
+static void sync_transfer_wait_for_completion(struct libusb_transfer *transfer)
+{
+	int r, *completed = transfer->user_data;
+	struct libusb_context *ctx = HANDLE_CTX(transfer->dev_handle);
+
+	while (!*completed) {
+		r = libusb_handle_events_completed(ctx, completed);
+		if (r < 0) {
+			if (r == LIBUSB_ERROR_INTERRUPTED)
+				continue;
+			usbi_err(ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying",
+				 libusb_error_name(r));
+			libusb_cancel_transfer(transfer);
+			continue;
+		}
+	}
+}
+
+/** \ingroup libusb_syncio
+ * Perform a USB control transfer.
+ *
+ * The direction of the transfer is inferred from the bmRequestType field of
+ * the setup packet.
+ *
+ * The wValue, wIndex and wLength fields values should be given in host-endian
+ * byte order.
+ *
+ * \param dev_handle a handle for the device to communicate with
+ * \param bmRequestType the request type field for the setup packet
+ * \param bRequest the request field for the setup packet
+ * \param wValue the value field for the setup packet
+ * \param wIndex the index field for the setup packet
+ * \param data a suitably-sized data buffer for either input or output
+ * (depending on direction bits within bmRequestType)
+ * \param wLength the length field for the setup packet. The data buffer should
+ * be at least this size.
+ * \param timeout timeout (in millseconds) that this function should wait
+ * before giving up due to no response being received. For an unlimited
+ * timeout, use value 0.
+ * \returns on success, the number of bytes actually transferred
+ * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out
+ * \returns LIBUSB_ERROR_PIPE if the control request was not supported by the
+ * device
+ * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected
+ * \returns LIBUSB_ERROR_BUSY if called from event handling context
+ * \returns LIBUSB_ERROR_INVALID_PARAM if the transfer size is larger than
+ * the operating system and/or hardware can support
+ * \returns another LIBUSB_ERROR code on other failures
+ */
+int API_EXPORTED libusb_control_transfer(libusb_device_handle *dev_handle,
+	uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
+	unsigned char *data, uint16_t wLength, unsigned int timeout)
+{
+	struct libusb_transfer *transfer;
+	unsigned char *buffer;
+	int completed = 0;
+	int r;
+
+	if (usbi_handling_events(HANDLE_CTX(dev_handle)))
+		return LIBUSB_ERROR_BUSY;
+
+	transfer = libusb_alloc_transfer(0);
+	if (!transfer)
+		return LIBUSB_ERROR_NO_MEM;
+
+	buffer = (unsigned char*) malloc(LIBUSB_CONTROL_SETUP_SIZE + wLength);
+	if (!buffer) {
+		libusb_free_transfer(transfer);
+		return LIBUSB_ERROR_NO_MEM;
+	}
+
+	libusb_fill_control_setup(buffer, bmRequestType, bRequest, wValue, wIndex,
+		wLength);
+	if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_OUT)
+		memcpy(buffer + LIBUSB_CONTROL_SETUP_SIZE, data, wLength);
+
+	libusb_fill_control_transfer(transfer, dev_handle, buffer,
+		sync_transfer_cb, &completed, timeout);
+	transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER;
+	r = libusb_submit_transfer(transfer);
+	if (r < 0) {
+		libusb_free_transfer(transfer);
+		return r;
+	}
+
+	sync_transfer_wait_for_completion(transfer);
+
+	if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_IN)
+		memcpy(data, libusb_control_transfer_get_data(transfer),
+			transfer->actual_length);
+
+	switch (transfer->status) {
+	case LIBUSB_TRANSFER_COMPLETED:
+		r = transfer->actual_length;
+		break;
+	case LIBUSB_TRANSFER_TIMED_OUT:
+		r = LIBUSB_ERROR_TIMEOUT;
+		break;
+	case LIBUSB_TRANSFER_STALL:
+		r = LIBUSB_ERROR_PIPE;
+		break;
+	case LIBUSB_TRANSFER_NO_DEVICE:
+		r = LIBUSB_ERROR_NO_DEVICE;
+		break;
+	case LIBUSB_TRANSFER_OVERFLOW:
+		r = LIBUSB_ERROR_OVERFLOW;
+		break;
+	case LIBUSB_TRANSFER_ERROR:
+	case LIBUSB_TRANSFER_CANCELLED:
+		r = LIBUSB_ERROR_IO;
+		break;
+	default:
+		usbi_warn(HANDLE_CTX(dev_handle),
+			"unrecognised status code %d", transfer->status);
+		r = LIBUSB_ERROR_OTHER;
+	}
+
+	libusb_free_transfer(transfer);
+	return r;
+}
+
+// ============= TREZORD LIBUSB CODE ============
+
+// libusb does not have the option to cancel transfers, made through sync API
+// however, we did not want to rewrite everything into async API and
+// basically re-implement sync.c in go
+// -> so I added a function that kills running transfers on a device
+//
+// It works because I know there is always only 1 transfer running on 1 device,
+// because of mutexes in the golang code
+
+#define MAX_SAVED_TRANSFERS 256
+struct running_transfer {
+	struct libusb_device_handle *dev_handle;
+	struct libusb_transfer *transfer;
+};
+static struct running_transfer running_transfers[MAX_SAVED_TRANSFERS];
+// it will fail with >256 transfers, but since we limit 1 trezor to 1 transfer,
+// that would mean 256 concurrent connected trezors
+// - and also it doesn't fail that terribly, it just doesn't cancel the transfers
+
+static usbi_mutex_static_t running_transfers_lock = USBI_MUTEX_INITIALIZER;
+
+static void save_running_transfer(struct libusb_device_handle *dev_handle, struct libusb_transfer *transfer) {
+	usbi_dbg("wait for lock");
+	usbi_mutex_static_lock(&running_transfers_lock);
+	usbi_dbg("wait for lock finished");
+	int i = 0;
+	for (i = 0; i < MAX_SAVED_TRANSFERS; i++) {
+		if (running_transfers[i].dev_handle == NULL) {
+			usbi_dbg("saved at %d", i);
+			running_transfers[i].dev_handle = dev_handle;
+			running_transfers[i].transfer = transfer;
+			usbi_mutex_static_unlock(&running_transfers_lock);
+			return;
+		}
+	}
+	usbi_dbg("not saved");
+	usbi_mutex_static_unlock(&running_transfers_lock);
+}
+
+static struct libusb_transfer* get_and_remove_running_transfer(struct libusb_device_handle *dev_handle) {
+	usbi_dbg("wait for lock");
+	usbi_mutex_static_lock(&running_transfers_lock);
+	usbi_dbg("wait for lock finished");
+	int i = 0;
+	for (i = 0; i < MAX_SAVED_TRANSFERS; i++) {
+		if (running_transfers[i].dev_handle == dev_handle) {
+			usbi_dbg("got at %d", i);
+			struct libusb_transfer* res = running_transfers[i].transfer;
+			running_transfers[i].dev_handle = NULL;
+			running_transfers[i].transfer = NULL;
+			usbi_mutex_static_unlock(&running_transfers_lock);
+			return res;
+		}
+	}
+	usbi_dbg("did not get any");
+	usbi_mutex_static_unlock(&running_transfers_lock);
+	return NULL;
+}
+
+void API_EXPORTED libusb_cancel_sync_transfers_on_device(struct libusb_device_handle *dev_handle) {
+	struct libusb_transfer* t = get_and_remove_running_transfer(dev_handle);
+	if (t != NULL){
+		libusb_cancel_transfer(t);
+	}
+}
+
+// ============= TREZORD LIBUSB CODE END ========
+
+static int do_sync_bulk_transfer(struct libusb_device_handle *dev_handle,
+	unsigned char endpoint, unsigned char *buffer, int length,
+	int *transferred, unsigned int timeout, unsigned char type)
+{
+	usbi_dbg("start");
+	struct libusb_transfer *transfer;
+	int completed = 0;
+	int r;
+
+	if (usbi_handling_events(HANDLE_CTX(dev_handle))) {
+		usbi_dbg("busy");
+		return LIBUSB_ERROR_BUSY;
+  }
+
+	transfer = libusb_alloc_transfer(0);
+	if (!transfer) {
+		usbi_dbg("no memory");
+		return LIBUSB_ERROR_NO_MEM;
+	}
+
+	libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer, length,
+		sync_transfer_cb, &completed, timeout);
+	transfer->type = type;
+
+	usbi_dbg("submit transfer");
+	r = libusb_submit_transfer(transfer);
+	if (r < 0) {
+		usbi_dbg("errored, try to free, returning original error %d", r);
+		libusb_free_transfer(transfer);
+		return r;
+	}
+
+	usbi_dbg("save_running_transfer");
+	save_running_transfer(dev_handle, transfer);
+
+	usbi_dbg("sync_transfer_wait_for_completion");
+	sync_transfer_wait_for_completion(transfer);
+
+	// removing the transfer from the saved structure
+	usbi_dbg("get_and_remove_running_transfer");
+	get_and_remove_running_transfer(dev_handle);
+
+	if (transferred)
+		*transferred = transfer->actual_length;
+
+	switch (transfer->status) {
+	case LIBUSB_TRANSFER_COMPLETED:
+		usbi_dbg("completed");
+		r = 0;
+		break;
+	case LIBUSB_TRANSFER_TIMED_OUT:
+		usbi_dbg("timed out");
+		r = LIBUSB_ERROR_TIMEOUT;
+		break;
+	case LIBUSB_TRANSFER_STALL:
+		usbi_dbg("stall / pipe");
+		r = LIBUSB_ERROR_PIPE;
+		break;
+	case LIBUSB_TRANSFER_OVERFLOW:
+		usbi_dbg("overflow");
+		r = LIBUSB_ERROR_OVERFLOW;
+		break;
+	case LIBUSB_TRANSFER_NO_DEVICE:
+		usbi_dbg("no device");
+		r = LIBUSB_ERROR_NO_DEVICE;
+		break;
+	case LIBUSB_TRANSFER_ERROR:
+		usbi_dbg("transfer error");
+		r = LIBUSB_ERROR_IO;
+		break;
+	case LIBUSB_TRANSFER_CANCELLED:
+		usbi_dbg("cancelled");
+		r = LIBUSB_ERROR_IO;
+		break;
+	default:
+		usbi_warn(HANDLE_CTX(dev_handle),
+			"unrecognised status code %d", transfer->status);
+		r = LIBUSB_ERROR_OTHER;
+	}
+
+	usbi_dbg("regular freeing");
+	libusb_free_transfer(transfer);
+	return r;
+}
+
+/** \ingroup libusb_syncio
+ * Perform a USB bulk transfer. The direction of the transfer is inferred from
+ * the direction bits of the endpoint address.
+ *
+ * For bulk reads, the <tt>length</tt> field indicates the maximum length of
+ * data you are expecting to receive. If less data arrives than expected,
+ * this function will return that data, so be sure to check the
+ * <tt>transferred</tt> output parameter.
+ *
+ * You should also check the <tt>transferred</tt> parameter for bulk writes.
+ * Not all of the data may have been written.
+ *
+ * Also check <tt>transferred</tt> when dealing with a timeout error code.
+ * libusb may have to split your transfer into a number of chunks to satisfy
+ * underlying O/S requirements, meaning that the timeout may expire after
+ * the first few chunks have completed. libusb is careful not to lose any data
+ * that may have been transferred; do not assume that timeout conditions
+ * indicate a complete lack of I/O.
+ *
+ * \param dev_handle a handle for the device to communicate with
+ * \param endpoint the address of a valid endpoint to communicate with
+ * \param data a suitably-sized data buffer for either input or output
+ * (depending on endpoint)
+ * \param length for bulk writes, the number of bytes from data to be sent. for
+ * bulk reads, the maximum number of bytes to receive into the data buffer.
+ * \param transferred output location for the number of bytes actually
+ * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105),
+ * it is legal to pass a NULL pointer if you do not wish to receive this
+ * information.
+ * \param timeout timeout (in millseconds) that this function should wait
+ * before giving up due to no response being received. For an unlimited
+ * timeout, use value 0.
+ *
+ * \returns 0 on success (and populates <tt>transferred</tt>)
+ * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out (and populates
+ * <tt>transferred</tt>)
+ * \returns LIBUSB_ERROR_PIPE if the endpoint halted
+ * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see
+ * \ref libusb_packetoverflow
+ * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected
+ * \returns LIBUSB_ERROR_BUSY if called from event handling context
+ * \returns another LIBUSB_ERROR code on other failures
+ */
+int API_EXPORTED libusb_bulk_transfer(struct libusb_device_handle *dev_handle,
+	unsigned char endpoint, unsigned char *data, int length, int *transferred,
+	unsigned int timeout)
+{
+	return do_sync_bulk_transfer(dev_handle, endpoint, data, length,
+		transferred, timeout, LIBUSB_TRANSFER_TYPE_BULK);
+}
+
+/** \ingroup libusb_syncio
+ * Perform a USB interrupt transfer. The direction of the transfer is inferred
+ * from the direction bits of the endpoint address.
+ *
+ * For interrupt reads, the <tt>length</tt> field indicates the maximum length
+ * of data you are expecting to receive. If less data arrives than expected,
+ * this function will return that data, so be sure to check the
+ * <tt>transferred</tt> output parameter.
+ *
+ * You should also check the <tt>transferred</tt> parameter for interrupt
+ * writes. Not all of the data may have been written.
+ *
+ * Also check <tt>transferred</tt> when dealing with a timeout error code.
+ * libusb may have to split your transfer into a number of chunks to satisfy
+ * underlying O/S requirements, meaning that the timeout may expire after
+ * the first few chunks have completed. libusb is careful not to lose any data
+ * that may have been transferred; do not assume that timeout conditions
+ * indicate a complete lack of I/O.
+ *
+ * The default endpoint bInterval value is used as the polling interval.
+ *
+ * \param dev_handle a handle for the device to communicate with
+ * \param endpoint the address of a valid endpoint to communicate with
+ * \param data a suitably-sized data buffer for either input or output
+ * (depending on endpoint)
+ * \param length for bulk writes, the number of bytes from data to be sent. for
+ * bulk reads, the maximum number of bytes to receive into the data buffer.
+ * \param transferred output location for the number of bytes actually
+ * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105),
+ * it is legal to pass a NULL pointer if you do not wish to receive this
+ * information.
+ * \param timeout timeout (in millseconds) that this function should wait
+ * before giving up due to no response being received. For an unlimited
+ * timeout, use value 0.
+ *
+ * \returns 0 on success (and populates <tt>transferred</tt>)
+ * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out
+ * \returns LIBUSB_ERROR_PIPE if the endpoint halted
+ * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see
+ * \ref libusb_packetoverflow
+ * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected
+ * \returns LIBUSB_ERROR_BUSY if called from event handling context
+ * \returns another LIBUSB_ERROR code on other error
+ */
+int API_EXPORTED libusb_interrupt_transfer(
+	struct libusb_device_handle *dev_handle, unsigned char endpoint,
+	unsigned char *data, int length, int *transferred, unsigned int timeout)
+{
+	return do_sync_bulk_transfer(dev_handle, endpoint, data, length,
+		transferred, timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT);
+}

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/version.h

@@ -0,0 +1,18 @@
+/* This file is parsed by m4 and windres and RC.EXE so please keep it simple. */
+#include "version_nano.h"
+#ifndef LIBUSB_MAJOR
+#define LIBUSB_MAJOR 1
+#endif
+#ifndef LIBUSB_MINOR
+#define LIBUSB_MINOR 0
+#endif
+#ifndef LIBUSB_MICRO
+#define LIBUSB_MICRO 21
+#endif
+#ifndef LIBUSB_NANO
+#define LIBUSB_NANO 0
+#endif
+/* LIBUSB_RC is the release candidate suffix. Should normally be empty. */
+#ifndef LIBUSB_RC
+#define LIBUSB_RC ""
+#endif

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/c/version_nano.h

@@ -0,0 +1 @@
+#define LIBUSB_NANO 11182

vendor/github.com/trezor/trezord-go/usb/lowlevel/libusb/log.go

@@ -0,0 +1,20 @@
+package libusb
+
+import (
+	"io"
+)
+
+import "C"
+
+var writer io.Writer
+
+func SetLogWriter(l io.Writer) {
+	writer = l
+}
+
+//export goLibusbLog
+func goLibusbLog(s *C.char) {
+	if writer != nil {
+		writer.Write([]byte(C.GoString(s)))
+	}
+}

vendor/vendor.json

@@ -519,6 +519,12 @@
 			"revision": "a2d3424409cf8a6d85e6d202cee068a054002926",
 			"revisionTime": "2019-04-26T13:37:49Z"
 		},
+		{
+			"checksumSHA1": "TeiwnQhbuEi9oPtyrZ7Fqkw1Zfc=",
+			"path": "github.com/trezor/trezord-go/memorywriter",
+			"revision": "a2d3424409cf8a6d85e6d202cee068a054002926",
+			"revisionTime": "2019-04-26T13:37:49Z"
+		},
 		{
 			"checksumSHA1": "u+yNdeytnW3PFudehX+iRzemass=",
 			"path": "github.com/trezor/trezord-go/usb",
@@ -531,6 +537,12 @@
 			"revision": "a2d3424409cf8a6d85e6d202cee068a054002926",
 			"revisionTime": "2019-04-26T13:37:49Z"
 		},
+		{
+			"checksumSHA1": "D7WRCxl4qghkCjbYi3xM/2VQ0Bo=",
+			"path": "github.com/trezor/trezord-go/usb/lowlevel/libusb",
+			"revision": "a2d3424409cf8a6d85e6d202cee068a054002926",
+			"revisionTime": "2019-04-26T13:37:49Z"
+		},
 		{
 			"checksumSHA1": "bygwvMqtbADjO4M3MFcMEuDajEo=",
 			"path": "github.com/trezor/trezord-go/wire",