Merge pull request #3681 from karalabe/usb-hidapi

accounts/usbwallet: swap karalabe/gousb to karalabe/hid

11 files changed, 0 insertions, 1388 deletions

diff --git a/vendor/github.com/karalabe/gousb/usb/config.go b/vendor/github.com/karalabe/gousb/usb/config.go
deleted file mode 100644
index 840bce63c..000000000
--- a/vendor/github.com/karalabe/gousb/usb/config.go
+++ /dev/null
@@ -1,153 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-/*
-#ifndef OS_WINDOWS
-	#include "os/threads_posix.h"
-#endif
-#include "libusbi.h"
-#include "libusb.h"
-*/
-import "C"
-
-import (
-	"fmt"
-	"reflect"
-	"unsafe"
-)
-
-type EndpointInfo struct {
-	Address       uint8
-	Attributes    uint8
-	MaxPacketSize uint16
-	MaxIsoPacket  uint32
-	PollInterval  uint8
-	RefreshRate   uint8
-	SynchAddress  uint8
-}
-
-func (e EndpointInfo) Number() int {
-	return int(e.Address) & ENDPOINT_NUM_MASK
-}
-
-func (e EndpointInfo) Direction() EndpointDirection {
-	return EndpointDirection(e.Address) & ENDPOINT_DIR_MASK
-}
-
-func (e EndpointInfo) String() string {
-	return fmt.Sprintf("Endpoint %d %-3s %s - %s %s [%d %d]",
-		e.Number(), e.Direction(),
-		TransferType(e.Attributes)&TRANSFER_TYPE_MASK,
-		IsoSyncType(e.Attributes)&ISO_SYNC_TYPE_MASK,
-		IsoUsageType(e.Attributes)&ISO_USAGE_TYPE_MASK,
-		e.MaxPacketSize, e.MaxIsoPacket,
-	)
-}
-
-type InterfaceInfo struct {
-	Number uint8
-	Setups []InterfaceSetup
-}
-
-func (i InterfaceInfo) String() string {
-	return fmt.Sprintf("Interface %02x (%d setups)", i.Number, len(i.Setups))
-}
-
-type InterfaceSetup struct {
-	Number     uint8
-	Alternate  uint8
-	IfClass    uint8
-	IfSubClass uint8
-	IfProtocol uint8
-	Endpoints  []EndpointInfo
-}
-
-func (a InterfaceSetup) String() string {
-	return fmt.Sprintf("Interface %02x Setup %02x", a.Number, a.Alternate)
-}
-
-type ConfigInfo struct {
-	Config     uint8
-	Attributes uint8
-	MaxPower   uint8
-	Interfaces []InterfaceInfo
-}
-
-func (c ConfigInfo) String() string {
-	return fmt.Sprintf("Config %02x", c.Config)
-}
-
-func newConfig(dev *C.libusb_device, cfg *C.struct_libusb_config_descriptor) ConfigInfo {
-	c := ConfigInfo{
-		Config:     uint8(cfg.bConfigurationValue),
-		Attributes: uint8(cfg.bmAttributes),
-		MaxPower:   uint8(cfg.MaxPower),
-	}
-
-	var ifaces []C.struct_libusb_interface
-	*(*reflect.SliceHeader)(unsafe.Pointer(&ifaces)) = reflect.SliceHeader{
-		Data: uintptr(unsafe.Pointer(cfg._interface)),
-		Len:  int(cfg.bNumInterfaces),
-		Cap:  int(cfg.bNumInterfaces),
-	}
-	c.Interfaces = make([]InterfaceInfo, 0, len(ifaces))
-	for _, iface := range ifaces {
-		if iface.num_altsetting == 0 {
-			continue
-		}
-
-		var alts []C.struct_libusb_interface_descriptor
-		*(*reflect.SliceHeader)(unsafe.Pointer(&alts)) = reflect.SliceHeader{
-			Data: uintptr(unsafe.Pointer(iface.altsetting)),
-			Len:  int(iface.num_altsetting),
-			Cap:  int(iface.num_altsetting),
-		}
-		descs := make([]InterfaceSetup, 0, len(alts))
-		for _, alt := range alts {
-			i := InterfaceSetup{
-				Number:     uint8(alt.bInterfaceNumber),
-				Alternate:  uint8(alt.bAlternateSetting),
-				IfClass:    uint8(alt.bInterfaceClass),
-				IfSubClass: uint8(alt.bInterfaceSubClass),
-				IfProtocol: uint8(alt.bInterfaceProtocol),
-			}
-			var ends []C.struct_libusb_endpoint_descriptor
-			*(*reflect.SliceHeader)(unsafe.Pointer(&ends)) = reflect.SliceHeader{
-				Data: uintptr(unsafe.Pointer(alt.endpoint)),
-				Len:  int(alt.bNumEndpoints),
-				Cap:  int(alt.bNumEndpoints),
-			}
-			i.Endpoints = make([]EndpointInfo, 0, len(ends))
-			for _, end := range ends {
-				i.Endpoints = append(i.Endpoints, EndpointInfo{
-					Address:       uint8(end.bEndpointAddress),
-					Attributes:    uint8(end.bmAttributes),
-					MaxPacketSize: uint16(end.wMaxPacketSize),
-					//MaxIsoPacket:  uint32(C.libusb_get_max_iso_packet_size(dev, C.uchar(end.bEndpointAddress))),
-					PollInterval: uint8(end.bInterval),
-					RefreshRate:  uint8(end.bRefresh),
-					SynchAddress: uint8(end.bSynchAddress),
-				})
-			}
-			descs = append(descs, i)
-		}
-		c.Interfaces = append(c.Interfaces, InterfaceInfo{
-			Number: descs[0].Number,
-			Setups: descs,
-		})
-	}
-	return c
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/constants.go b/vendor/github.com/karalabe/gousb/usb/constants.go
deleted file mode 100644
index 7f0287d5c..000000000
--- a/vendor/github.com/karalabe/gousb/usb/constants.go
+++ /dev/null
@@ -1,183 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-// #include "libusb.h"
-import "C"
-
-type Class uint8
-
-const (
-	CLASS_PER_INTERFACE Class = C.LIBUSB_CLASS_PER_INTERFACE
-	CLASS_AUDIO         Class = C.LIBUSB_CLASS_AUDIO
-	CLASS_COMM          Class = C.LIBUSB_CLASS_COMM
-	CLASS_HID           Class = C.LIBUSB_CLASS_HID
-	CLASS_PRINTER       Class = C.LIBUSB_CLASS_PRINTER
-	CLASS_PTP           Class = C.LIBUSB_CLASS_PTP
-	CLASS_MASS_STORAGE  Class = C.LIBUSB_CLASS_MASS_STORAGE
-	CLASS_HUB           Class = C.LIBUSB_CLASS_HUB
-	CLASS_DATA          Class = C.LIBUSB_CLASS_DATA
-	CLASS_WIRELESS      Class = C.LIBUSB_CLASS_WIRELESS
-	CLASS_APPLICATION   Class = C.LIBUSB_CLASS_APPLICATION
-	CLASS_VENDOR_SPEC   Class = C.LIBUSB_CLASS_VENDOR_SPEC
-)
-
-var classDescription = map[Class]string{
-	CLASS_PER_INTERFACE: "per-interface",
-	CLASS_AUDIO:         "audio",
-	CLASS_COMM:          "communications",
-	CLASS_HID:           "human interface device",
-	CLASS_PRINTER:       "printer dclass",
-	CLASS_PTP:           "picture transfer protocol",
-	CLASS_MASS_STORAGE:  "mass storage",
-	CLASS_HUB:           "hub",
-	CLASS_DATA:          "data",
-	CLASS_WIRELESS:      "wireless",
-	CLASS_APPLICATION:   "application",
-	CLASS_VENDOR_SPEC:   "vendor-specific",
-}
-
-func (c Class) String() string {
-	return classDescription[c]
-}
-
-type DescriptorType uint8
-
-const (
-	DT_DEVICE    DescriptorType = C.LIBUSB_DT_DEVICE
-	DT_CONFIG    DescriptorType = C.LIBUSB_DT_CONFIG
-	DT_STRING    DescriptorType = C.LIBUSB_DT_STRING
-	DT_INTERFACE DescriptorType = C.LIBUSB_DT_INTERFACE
-	DT_ENDPOINT  DescriptorType = C.LIBUSB_DT_ENDPOINT
-	DT_HID       DescriptorType = C.LIBUSB_DT_HID
-	DT_REPORT    DescriptorType = C.LIBUSB_DT_REPORT
-	DT_PHYSICAL  DescriptorType = C.LIBUSB_DT_PHYSICAL
-	DT_HUB       DescriptorType = C.LIBUSB_DT_HUB
-)
-
-var descriptorTypeDescription = map[DescriptorType]string{
-	DT_DEVICE:    "device",
-	DT_CONFIG:    "configuration",
-	DT_STRING:    "string",
-	DT_INTERFACE: "interface",
-	DT_ENDPOINT:  "endpoint",
-	DT_HID:       "HID",
-	DT_REPORT:    "HID report",
-	DT_PHYSICAL:  "physical",
-	DT_HUB:       "hub",
-}
-
-func (dt DescriptorType) String() string {
-	return descriptorTypeDescription[dt]
-}
-
-type EndpointDirection uint8
-
-const (
-	ENDPOINT_NUM_MASK                   = 0x03
-	ENDPOINT_DIR_IN   EndpointDirection = C.LIBUSB_ENDPOINT_IN
-	ENDPOINT_DIR_OUT  EndpointDirection = C.LIBUSB_ENDPOINT_OUT
-	ENDPOINT_DIR_MASK EndpointDirection = 0x80
-)
-
-var endpointDirectionDescription = map[EndpointDirection]string{
-	ENDPOINT_DIR_IN:  "IN",
-	ENDPOINT_DIR_OUT: "OUT",
-}
-
-func (ed EndpointDirection) String() string {
-	return endpointDirectionDescription[ed]
-}
-
-type TransferType uint8
-
-const (
-	TRANSFER_TYPE_CONTROL     TransferType = C.LIBUSB_TRANSFER_TYPE_CONTROL
-	TRANSFER_TYPE_ISOCHRONOUS TransferType = C.LIBUSB_TRANSFER_TYPE_ISOCHRONOUS
-	TRANSFER_TYPE_BULK        TransferType = C.LIBUSB_TRANSFER_TYPE_BULK
-	TRANSFER_TYPE_INTERRUPT   TransferType = C.LIBUSB_TRANSFER_TYPE_INTERRUPT
-	TRANSFER_TYPE_MASK        TransferType = 0x03
-)
-
-var transferTypeDescription = map[TransferType]string{
-	TRANSFER_TYPE_CONTROL:     "control",
-	TRANSFER_TYPE_ISOCHRONOUS: "isochronous",
-	TRANSFER_TYPE_BULK:        "bulk",
-	TRANSFER_TYPE_INTERRUPT:   "interrupt",
-}
-
-func (tt TransferType) String() string {
-	return transferTypeDescription[tt]
-}
-
-type IsoSyncType uint8
-
-const (
-	ISO_SYNC_TYPE_NONE     IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_NONE << 2
-	ISO_SYNC_TYPE_ASYNC    IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_ASYNC << 2
-	ISO_SYNC_TYPE_ADAPTIVE IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_ADAPTIVE << 2
-	ISO_SYNC_TYPE_SYNC     IsoSyncType = C.LIBUSB_ISO_SYNC_TYPE_SYNC << 2
-	ISO_SYNC_TYPE_MASK     IsoSyncType = 0x0C
-)
-
-var isoSyncTypeDescription = map[IsoSyncType]string{
-	ISO_SYNC_TYPE_NONE:     "unsynchronized",
-	ISO_SYNC_TYPE_ASYNC:    "asynchronous",
-	ISO_SYNC_TYPE_ADAPTIVE: "adaptive",
-	ISO_SYNC_TYPE_SYNC:     "synchronous",
-}
-
-func (ist IsoSyncType) String() string {
-	return isoSyncTypeDescription[ist]
-}
-
-type IsoUsageType uint8
-
-const (
-	ISO_USAGE_TYPE_DATA     IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_DATA << 4
-	ISO_USAGE_TYPE_FEEDBACK IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_FEEDBACK << 4
-	ISO_USAGE_TYPE_IMPLICIT IsoUsageType = C.LIBUSB_ISO_USAGE_TYPE_IMPLICIT << 4
-	ISO_USAGE_TYPE_MASK     IsoUsageType = 0x30
-)
-
-var isoUsageTypeDescription = map[IsoUsageType]string{
-	ISO_USAGE_TYPE_DATA:     "data",
-	ISO_USAGE_TYPE_FEEDBACK: "feedback",
-	ISO_USAGE_TYPE_IMPLICIT: "implicit data",
-}
-
-func (iut IsoUsageType) String() string {
-	return isoUsageTypeDescription[iut]
-}
-
-type RequestType uint8
-
-const (
-	REQUEST_TYPE_STANDARD = C.LIBUSB_REQUEST_TYPE_STANDARD
-	REQUEST_TYPE_CLASS    = C.LIBUSB_REQUEST_TYPE_CLASS
-	REQUEST_TYPE_VENDOR   = C.LIBUSB_REQUEST_TYPE_VENDOR
-	REQUEST_TYPE_RESERVED = C.LIBUSB_REQUEST_TYPE_RESERVED
-)
-
-var requestTypeDescription = map[RequestType]string{
-	REQUEST_TYPE_STANDARD: "standard",
-	REQUEST_TYPE_CLASS:    "class",
-	REQUEST_TYPE_VENDOR:   "vendor",
-	REQUEST_TYPE_RESERVED: "reserved",
-}
-
-func (rt RequestType) String() string {
-	return requestTypeDescription[rt]
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/debug.go b/vendor/github.com/karalabe/gousb/usb/debug.go
deleted file mode 100644
index e7de8e522..000000000
--- a/vendor/github.com/karalabe/gousb/usb/debug.go
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-// To enable internal debugging:
-//   -ldflags "-X github.com/karalabe/gousb/usb.debugInternal true"
-
-import (
-	"io"
-	"io/ioutil"
-	"log" // TODO(kevlar): make a logger
-	"os"
-)
-
-var debug *log.Logger
-var debugInternal string
-
-func init() {
-	var out io.Writer = ioutil.Discard
-	if debugInternal != "" {
-		out = os.Stderr
-	}
-	debug = log.New(out, "usb", log.LstdFlags|log.Lshortfile)
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/descriptor.go b/vendor/github.com/karalabe/gousb/usb/descriptor.go
deleted file mode 100644
index 2551dfc23..000000000
--- a/vendor/github.com/karalabe/gousb/usb/descriptor.go
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-/*
-#ifndef OS_WINDOWS
-	#include "os/threads_posix.h"
-#endif
-#include "libusbi.h"
-#include "libusb.h"
-*/
-import "C"
-
-type Descriptor struct {
-	// Bus information
-	Bus     uint8 // The bus on which the device was detected
-	Address uint8 // The address of the device on the bus
-
-	// Version information
-	Spec   BCD // USB Specification Release Number
-	Device BCD // The device version
-
-	// Product information
-	Vendor  ID // The Vendor identifer
-	Product ID // The Product identifier
-
-	// Protocol information
-	Class    uint8 // The class of this device
-	SubClass uint8 // The sub-class (within the class) of this device
-	Protocol uint8 // The protocol (within the sub-class) of this device
-
-	// Configuration information
-	Configs []ConfigInfo
-}
-
-func newDescriptor(dev *C.libusb_device) (*Descriptor, error) {
-	var desc C.struct_libusb_device_descriptor
-	if errno := C.libusb_get_device_descriptor(dev, &desc); errno < 0 {
-		return nil, usbError(errno)
-	}
-
-	// Enumerate configurations
-	var cfgs []ConfigInfo
-	for i := 0; i < int(desc.bNumConfigurations); i++ {
-		var cfg *C.struct_libusb_config_descriptor
-		if errno := C.libusb_get_config_descriptor(dev, C.uint8_t(i), &cfg); errno < 0 {
-			return nil, usbError(errno)
-		}
-		cfgs = append(cfgs, newConfig(dev, cfg))
-		C.libusb_free_config_descriptor(cfg)
-	}
-
-	return &Descriptor{
-		Bus:      uint8(C.libusb_get_bus_number(dev)),
-		Address:  uint8(C.libusb_get_device_address(dev)),
-		Spec:     BCD(desc.bcdUSB),
-		Device:   BCD(desc.bcdDevice),
-		Vendor:   ID(desc.idVendor),
-		Product:  ID(desc.idProduct),
-		Class:    uint8(desc.bDeviceClass),
-		SubClass: uint8(desc.bDeviceSubClass),
-		Protocol: uint8(desc.bDeviceProtocol),
-		Configs:  cfgs,
-	}, nil
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/device.go b/vendor/github.com/karalabe/gousb/usb/device.go
deleted file mode 100644
index b4c4131fa..000000000
--- a/vendor/github.com/karalabe/gousb/usb/device.go
+++ /dev/null
@@ -1,295 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-/*
-#ifndef OS_WINDOWS
-	#include "os/threads_posix.h"
-#endif
-#include "libusbi.h"
-#include "libusb.h"
-*/
-import "C"
-
-import (
-	"fmt"
-	"reflect"
-	"sync"
-	"time"
-	"unsafe"
-)
-
-var DefaultReadTimeout = 1 * time.Second
-var DefaultWriteTimeout = 1 * time.Second
-var DefaultControlTimeout = 250 * time.Millisecond //5 * time.Second
-
-type Device struct {
-	handle *C.libusb_device_handle
-
-	// Embed the device information for easy access
-	*Descriptor
-
-	// Timeouts
-	ReadTimeout    time.Duration
-	WriteTimeout   time.Duration
-	ControlTimeout time.Duration
-
-	// Claimed interfaces
-	lock    *sync.Mutex
-	claimed map[uint8]int
-
-	// Detached kernel interfaces
-	detached map[uint8]int
-}
-
-func newDevice(handle *C.libusb_device_handle, desc *Descriptor) (*Device, error) {
-	ifaces := 0
-	d := &Device{
-		handle:         handle,
-		Descriptor:     desc,
-		ReadTimeout:    DefaultReadTimeout,
-		WriteTimeout:   DefaultWriteTimeout,
-		ControlTimeout: DefaultControlTimeout,
-		lock:           new(sync.Mutex),
-		claimed:        make(map[uint8]int, ifaces),
-		detached:       make(map[uint8]int),
-	}
-
-	if err := d.detachKernelDriver(); err != nil {
-		d.Close()
-		return nil, err
-	}
-
-	return d, nil
-}
-
-// detachKernelDriver detaches any active kernel drivers, if supported by the platform.
-// If there are any errors, like Context.ListDevices, only the final one will be returned.
-func (d *Device) detachKernelDriver() (err error) {
-	for _, cfg := range d.Configs {
-		for _, iface := range cfg.Interfaces {
-			switch activeErr := C.libusb_kernel_driver_active(d.handle, C.int(iface.Number)); activeErr {
-			case C.LIBUSB_ERROR_NOT_SUPPORTED:
-				// no need to do any futher checking, no platform support
-				return
-			case 0:
-				continue
-			case 1:
-				switch detachErr := C.libusb_detach_kernel_driver(d.handle, C.int(iface.Number)); detachErr {
-				case C.LIBUSB_ERROR_NOT_SUPPORTED:
-					// shouldn't ever get here, should be caught by the outer switch
-					return
-				case 0:
-					d.detached[iface.Number]++
-				case C.LIBUSB_ERROR_NOT_FOUND:
-					// this status is returned if libusb's driver is already attached to the device
-					d.detached[iface.Number]++
-				default:
-					err = fmt.Errorf("usb: detach kernel driver: %s", usbError(detachErr))
-				}
-			default:
-				err = fmt.Errorf("usb: active kernel driver check: %s", usbError(activeErr))
-			}
-		}
-	}
-
-	return
-}
-
-// attachKernelDriver re-attaches kernel drivers to any previously detached interfaces, if supported by the platform.
-// If there are any errors, like Context.ListDevices, only the final one will be returned.
-func (d *Device) attachKernelDriver() (err error) {
-	for iface := range d.detached {
-		switch attachErr := C.libusb_attach_kernel_driver(d.handle, C.int(iface)); attachErr {
-		case C.LIBUSB_ERROR_NOT_SUPPORTED:
-			// no need to do any futher checking, no platform support
-			return
-		case 0:
-			continue
-		default:
-			err = fmt.Errorf("usb: attach kernel driver: %s", usbError(attachErr))
-		}
-	}
-
-	return
-}
-
-func (d *Device) Reset() error {
-	if errno := C.libusb_reset_device(d.handle); errno != 0 {
-		return usbError(errno)
-	}
-	return nil
-}
-
-func (d *Device) Control(rType, request uint8, val, idx uint16, data []byte) (int, error) {
-	//log.Printf("control xfer: %d:%d/%d:%d %x", idx, rType, request, val, string(data))
-	dataSlice := (*reflect.SliceHeader)(unsafe.Pointer(&data))
-	n := C.libusb_control_transfer(
-		d.handle,
-		C.uint8_t(rType),
-		C.uint8_t(request),
-		C.uint16_t(val),
-		C.uint16_t(idx),
-		(*C.uchar)(unsafe.Pointer(dataSlice.Data)),
-		C.uint16_t(len(data)),
-		C.uint(d.ControlTimeout/time.Millisecond))
-	if n < 0 {
-		return int(n), usbError(n)
-	}
-	return int(n), nil
-}
-
-// ActiveConfig returns the config id (not the index) of the active configuration.
-// This corresponds to the ConfigInfo.Config field.
-func (d *Device) ActiveConfig() (uint8, error) {
-	var cfg C.int
-	if errno := C.libusb_get_configuration(d.handle, &cfg); errno < 0 {
-		return 0, usbError(errno)
-	}
-	return uint8(cfg), nil
-}
-
-// SetConfig attempts to change the active configuration.
-// The cfg provided is the config id (not the index) of the configuration to set,
-// which corresponds to the ConfigInfo.Config field.
-func (d *Device) SetConfig(cfg uint8) error {
-	if errno := C.libusb_set_configuration(d.handle, C.int(cfg)); errno < 0 {
-		return usbError(errno)
-	}
-	return nil
-}
-
-// Close the device.
-func (d *Device) Close() error {
-	if d.handle == nil {
-		return fmt.Errorf("usb: double close on device")
-	}
-	d.lock.Lock()
-	defer d.lock.Unlock()
-	for iface := range d.claimed {
-		C.libusb_release_interface(d.handle, C.int(iface))
-	}
-	d.attachKernelDriver()
-	C.libusb_close(d.handle)
-	d.handle = nil
-	return nil
-}
-
-func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error) {
-	end := &endpoint{
-		Device: d,
-	}
-
-	var setAlternate bool
-	for _, c := range d.Configs {
-		if c.Config != conf {
-			continue
-		}
-		debug.Printf("found conf: %#v\n", c)
-		for _, i := range c.Interfaces {
-			if i.Number != iface {
-				continue
-			}
-			debug.Printf("found iface: %#v\n", i)
-			for i, s := range i.Setups {
-				if s.Alternate != setup {
-					continue
-				}
-				setAlternate = i != 0
-
-				debug.Printf("found setup: %#v [default: %v]\n", s, !setAlternate)
-				for _, e := range s.Endpoints {
-					debug.Printf("ep %02x search: %#v\n", epoint, s)
-					if e.Address != epoint {
-						continue
-					}
-					end.InterfaceSetup = s
-					end.EndpointInfo = e
-					switch tt := TransferType(e.Attributes) & TRANSFER_TYPE_MASK; tt {
-					case TRANSFER_TYPE_BULK:
-						end.xfer = bulk_xfer
-					case TRANSFER_TYPE_INTERRUPT:
-						end.xfer = interrupt_xfer
-					case TRANSFER_TYPE_ISOCHRONOUS:
-						end.xfer = isochronous_xfer
-					default:
-						return nil, fmt.Errorf("usb: %s transfer is unsupported", tt)
-					}
-					goto found
-				}
-				return nil, fmt.Errorf("usb: unknown endpoint %02x", epoint)
-			}
-			return nil, fmt.Errorf("usb: unknown setup %02x", setup)
-		}
-		return nil, fmt.Errorf("usb: unknown interface %02x", iface)
-	}
-	return nil, fmt.Errorf("usb: unknown configuration %02x", conf)
-
-found:
-
-	// Set the configuration
-	var activeConf C.int
-	if errno := C.libusb_get_configuration(d.handle, &activeConf); errno < 0 {
-		return nil, fmt.Errorf("usb: getcfg: %s", usbError(errno))
-	}
-	if int(activeConf) != int(conf) {
-		if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
-			return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
-		}
-	}
-
-	// Claim the interface
-	if errno := C.libusb_claim_interface(d.handle, C.int(iface)); errno < 0 {
-		return nil, fmt.Errorf("usb: claim: %s", usbError(errno))
-	}
-
-	// Increment the claim count
-	d.lock.Lock()
-	d.claimed[iface]++
-	d.lock.Unlock() // unlock immediately because the next calls may block
-
-	// Choose the alternate
-	if setAlternate {
-		if errno := C.libusb_set_interface_alt_setting(d.handle, C.int(iface), C.int(setup)); errno < 0 {
-			debug.Printf("altsetting error: %s", usbError(errno))
-			return nil, fmt.Errorf("usb: setalt: %s", usbError(errno))
-		}
-	}
-
-	return end, nil
-}
-
-func (d *Device) GetStringDescriptor(desc_index int) (string, error) {
-
-	// allocate 200-byte array limited the length of string descriptor
-	goBuffer := make([]byte, 200)
-
-	// get string descriptor from libusb. if errno < 0 then there are any errors.
-	// if errno >= 0; it is a length of result string descriptor
-	errno := C.libusb_get_string_descriptor_ascii(
-		d.handle,
-		C.uint8_t(desc_index),
-		(*C.uchar)(unsafe.Pointer(&goBuffer[0])),
-		200)
-
-	// if any errors occur
-	if errno < 0 {
-		return "", fmt.Errorf("usb: getstr: %s", usbError(errno))
-	}
-	// convert slice of byte to string with limited length from errno
-	stringDescriptor := string(goBuffer[:errno])
-
-	return stringDescriptor, nil
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/endpoint.go b/vendor/github.com/karalabe/gousb/usb/endpoint.go
deleted file mode 100644
index 12b4ccf95..000000000
--- a/vendor/github.com/karalabe/gousb/usb/endpoint.go
+++ /dev/null
@@ -1,100 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-// #include "libusb.h"
-import "C"
-
-import (
-	"fmt"
-	"reflect"
-	"time"
-	"unsafe"
-)
-
-type Endpoint interface {
-	Read(b []byte) (int, error)
-	Write(b []byte) (int, error)
-	Interface() InterfaceSetup
-	Info() EndpointInfo
-}
-
-type endpoint struct {
-	*Device
-	InterfaceSetup
-	EndpointInfo
-	xfer func(*endpoint, []byte, time.Duration) (int, error)
-}
-
-func (e *endpoint) Read(buf []byte) (int, error) {
-	if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_IN {
-		return 0, fmt.Errorf("usb: read: not an IN endpoint")
-	}
-
-	return e.xfer(e, buf, e.ReadTimeout)
-}
-
-func (e *endpoint) Write(buf []byte) (int, error) {
-	if EndpointDirection(e.Address)&ENDPOINT_DIR_MASK != ENDPOINT_DIR_OUT {
-		return 0, fmt.Errorf("usb: write: not an OUT endpoint")
-	}
-
-	return e.xfer(e, buf, e.WriteTimeout)
-}
-
-func (e *endpoint) Interface() InterfaceSetup { return e.InterfaceSetup }
-func (e *endpoint) Info() EndpointInfo        { return e.EndpointInfo }
-
-// TODO(kevlar): (*Endpoint).Close
-
-func bulk_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
-	if len(buf) == 0 {
-		return 0, nil
-	}
-
-	data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data
-
-	var cnt C.int
-	if errno := C.libusb_bulk_transfer(
-		e.handle,
-		C.uchar(e.Address),
-		(*C.uchar)(unsafe.Pointer(data)),
-		C.int(len(buf)),
-		&cnt,
-		C.uint(timeout/time.Millisecond)); errno < 0 {
-		return 0, usbError(errno)
-	}
-	return int(cnt), nil
-}
-
-func interrupt_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
-	if len(buf) == 0 {
-		return 0, nil
-	}
-
-	data := (*reflect.SliceHeader)(unsafe.Pointer(&buf)).Data
-
-	var cnt C.int
-	if errno := C.libusb_interrupt_transfer(
-		e.handle,
-		C.uchar(e.Address),
-		(*C.uchar)(unsafe.Pointer(data)),
-		C.int(len(buf)),
-		&cnt,
-		C.uint(timeout/time.Millisecond)); errno < 0 {
-		return 0, usbError(errno)
-	}
-	return int(cnt), nil
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/error.go b/vendor/github.com/karalabe/gousb/usb/error.go
deleted file mode 100644
index 30d47bce3..000000000
--- a/vendor/github.com/karalabe/gousb/usb/error.go
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-import (
-	"fmt"
-)
-
-// #include "libusb.h"
-import "C"
-
-type usbError C.int
-
-func (e usbError) Error() string {
-	return fmt.Sprintf("libusb: %s [code %d]", usbErrorString[e], int(e))
-}
-
-const (
-	SUCCESS             usbError = C.LIBUSB_SUCCESS
-	ERROR_IO            usbError = C.LIBUSB_ERROR_IO
-	ERROR_INVALID_PARAM usbError = C.LIBUSB_ERROR_INVALID_PARAM
-	ERROR_ACCESS        usbError = C.LIBUSB_ERROR_ACCESS
-	ERROR_NO_DEVICE     usbError = C.LIBUSB_ERROR_NO_DEVICE
-	ERROR_NOT_FOUND     usbError = C.LIBUSB_ERROR_NOT_FOUND
-	ERROR_BUSY          usbError = C.LIBUSB_ERROR_BUSY
-	ERROR_TIMEOUT       usbError = C.LIBUSB_ERROR_TIMEOUT
-	ERROR_OVERFLOW      usbError = C.LIBUSB_ERROR_OVERFLOW
-	ERROR_PIPE          usbError = C.LIBUSB_ERROR_PIPE
-	ERROR_INTERRUPTED   usbError = C.LIBUSB_ERROR_INTERRUPTED
-	ERROR_NO_MEM        usbError = C.LIBUSB_ERROR_NO_MEM
-	ERROR_NOT_SUPPORTED usbError = C.LIBUSB_ERROR_NOT_SUPPORTED
-	ERROR_OTHER         usbError = C.LIBUSB_ERROR_OTHER
-)
-
-var usbErrorString = map[usbError]string{
-	C.LIBUSB_SUCCESS:             "success",
-	C.LIBUSB_ERROR_IO:            "i/o error",
-	C.LIBUSB_ERROR_INVALID_PARAM: "invalid param",
-	C.LIBUSB_ERROR_ACCESS:        "bad access",
-	C.LIBUSB_ERROR_NO_DEVICE:     "no device",
-	C.LIBUSB_ERROR_NOT_FOUND:     "not found",
-	C.LIBUSB_ERROR_BUSY:          "device or resource busy",
-	C.LIBUSB_ERROR_TIMEOUT:       "timeout",
-	C.LIBUSB_ERROR_OVERFLOW:      "overflow",
-	C.LIBUSB_ERROR_PIPE:          "pipe error",
-	C.LIBUSB_ERROR_INTERRUPTED:   "interrupted",
-	C.LIBUSB_ERROR_NO_MEM:        "out of memory",
-	C.LIBUSB_ERROR_NOT_SUPPORTED: "not supported",
-	C.LIBUSB_ERROR_OTHER:         "unknown error",
-}
-
-type TransferStatus uint8
-
-const (
-	LIBUSB_TRANSFER_COMPLETED TransferStatus = C.LIBUSB_TRANSFER_COMPLETED
-	LIBUSB_TRANSFER_ERROR     TransferStatus = C.LIBUSB_TRANSFER_ERROR
-	LIBUSB_TRANSFER_TIMED_OUT TransferStatus = C.LIBUSB_TRANSFER_TIMED_OUT
-	LIBUSB_TRANSFER_CANCELLED TransferStatus = C.LIBUSB_TRANSFER_CANCELLED
-	LIBUSB_TRANSFER_STALL     TransferStatus = C.LIBUSB_TRANSFER_STALL
-	LIBUSB_TRANSFER_NO_DEVICE TransferStatus = C.LIBUSB_TRANSFER_NO_DEVICE
-	LIBUSB_TRANSFER_OVERFLOW  TransferStatus = C.LIBUSB_TRANSFER_OVERFLOW
-)
-
-var transferStatusDescription = map[TransferStatus]string{
-	LIBUSB_TRANSFER_COMPLETED: "transfer completed without error",
-	LIBUSB_TRANSFER_ERROR:     "transfer failed",
-	LIBUSB_TRANSFER_TIMED_OUT: "transfer timed out",
-	LIBUSB_TRANSFER_CANCELLED: "transfer was cancelled",
-	LIBUSB_TRANSFER_STALL:     "halt condition detected (endpoint stalled) or control request not supported",
-	LIBUSB_TRANSFER_NO_DEVICE: "device was disconnected",
-	LIBUSB_TRANSFER_OVERFLOW:  "device sent more data than requested",
-}
-
-func (ts TransferStatus) String() string {
-	return transferStatusDescription[ts]
-}
-
-func (ts TransferStatus) Error() string {
-	return "libusb: " + ts.String()
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/iso.c b/vendor/github.com/karalabe/gousb/usb/iso.c
deleted file mode 100644
index 054486318..000000000
--- a/vendor/github.com/karalabe/gousb/usb/iso.c
+++ /dev/null
@@ -1,79 +0,0 @@
-#include "libusb.h"
-#include <stdio.h>
-#include <string.h>
-
-void print_xfer(struct libusb_transfer *xfer);
-void iso_callback(void *);
-
-void callback(struct libusb_transfer *xfer) {
-	//printf("Callback!\n");
-	//print_xfer(xfer);
-	iso_callback(xfer->user_data);
-}
-
-int submit(struct libusb_transfer *xfer) {
-	xfer->callback = &callback;
-	xfer->status = -1;
-	//print_xfer(xfer);
-	//printf("Transfer submitted\n");
-
-	/* fake
-	strcpy(xfer->buffer, "hello");
-	xfer->actual_length = 5;
-	callback(xfer);
-	return 0; */
-	return libusb_submit_transfer(xfer);
-}
-
-void print_xfer(struct libusb_transfer *xfer) {
-	int i;
-
-	printf("Transfer:\n");
-	printf("  dev_handle:   %p\n", xfer->dev_handle);
-	printf("  flags:        %08x\n", xfer->flags);
-	printf("  endpoint:     %x\n", xfer->endpoint);
-	printf("  type:         %x\n", xfer->type);
-	printf("  timeout:      %dms\n", xfer->timeout);
-	printf("  status:       %x\n", xfer->status);
-	printf("  length:       %d (act: %d)\n", xfer->length, xfer->actual_length);
-	printf("  callback:     %p\n", xfer->callback);
-	printf("  user_data:    %p\n", xfer->user_data);
-	printf("  buffer:       %p\n", xfer->buffer);
-	printf("  num_iso_pkts: %d\n", xfer->num_iso_packets);
-	printf("  packets:\n");
-	for (i = 0; i < xfer->num_iso_packets; i++) {
-		printf("    [%04d] %d (act: %d) %x\n", i,
-			xfer->iso_packet_desc[i].length,
-			xfer->iso_packet_desc[i].actual_length,
-			xfer->iso_packet_desc[i].status);
-	}
-}
-
-int extract_data(struct libusb_transfer *xfer, void *raw, int max, unsigned char *status) {
-	int i;
-	int copied = 0;
-	unsigned char *in = xfer->buffer;
-	unsigned char *out = raw;
-	for (i = 0; i < xfer->num_iso_packets; i++) {
-		struct libusb_iso_packet_descriptor pkt = xfer->iso_packet_desc[i];
-
-		// Copy the data
-		int len = pkt.actual_length;
-		if (len > max) {
-			len = max;
-		}
-		memcpy(out, in, len);
-		copied += len;
-
-		// Increment offsets
-		in += pkt.length;
-		out += len;
-
-		// Extract first error
-		if (pkt.status == 0 || *status != 0) {
-			continue;
-		}
-		*status = pkt.status;
-	}
-	return copied;
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/iso.go b/vendor/github.com/karalabe/gousb/usb/iso.go
deleted file mode 100644
index 1ba694e0e..000000000
--- a/vendor/github.com/karalabe/gousb/usb/iso.go
+++ /dev/null
@@ -1,148 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-/*
-#include "libusb.h"
-
-int submit(struct libusb_transfer *xfer);
-void print_xfer(struct libusb_transfer *xfer);
-int extract_data(struct libusb_transfer *xfer, void *data, int max, unsigned char *status);
-*/
-import "C"
-
-import (
-	"fmt"
-	"log"
-	"time"
-	"unsafe"
-)
-
-//export iso_callback
-func iso_callback(cptr unsafe.Pointer) {
-	ch := *(*chan struct{})(cptr)
-	close(ch)
-}
-
-func (end *endpoint) allocTransfer() *Transfer {
-	// Use libusb_get_max_iso_packet_size ?
-	const (
-		iso_packets = 8       // 128 // 242
-		packet_size = 2 * 960 // 1760
-	)
-
-	xfer := C.libusb_alloc_transfer(C.int(iso_packets))
-	if xfer == nil {
-		log.Printf("usb: transfer allocation failed?!")
-		return nil
-	}
-
-	buf := make([]byte, iso_packets*packet_size)
-	done := make(chan struct{}, 1)
-
-	xfer.dev_handle = end.Device.handle
-	xfer.endpoint = C.uchar(end.Address)
-	xfer._type = C.LIBUSB_TRANSFER_TYPE_ISOCHRONOUS
-
-	xfer.buffer = (*C.uchar)((unsafe.Pointer)(&buf[0]))
-	xfer.length = C.int(len(buf))
-	xfer.num_iso_packets = iso_packets
-
-	C.libusb_set_iso_packet_lengths(xfer, packet_size)
-	/*
-		pkts := *(*[]C.struct_libusb_packet_descriptor)(unsafe.Pointer(&reflect.SliceHeader{
-			Data: uintptr(unsafe.Pointer(&xfer.iso_packet_desc)),
-			Len:  iso_packets,
-			Cap:  iso_packets,
-		}))
-	*/
-
-	t := &Transfer{
-		xfer: xfer,
-		done: done,
-		buf:  buf,
-	}
-	xfer.user_data = (unsafe.Pointer)(&t.done)
-
-	return t
-}
-
-type Transfer struct {
-	xfer *C.struct_libusb_transfer
-	pkts []*C.struct_libusb_packet_descriptor
-	done chan struct{}
-	buf  []byte
-}
-
-func (t *Transfer) Submit(timeout time.Duration) error {
-	//log.Printf("iso: submitting %#v", t.xfer)
-	t.xfer.timeout = C.uint(timeout / time.Millisecond)
-	if errno := C.submit(t.xfer); errno < 0 {
-		return usbError(errno)
-	}
-	return nil
-}
-
-func (t *Transfer) Wait(b []byte) (n int, err error) {
-	select {
-	case <-time.After(10 * time.Second):
-		return 0, fmt.Errorf("wait timed out after 10s")
-	case <-t.done:
-	}
-	// Non-iso transfers:
-	//n = int(t.xfer.actual_length)
-	//copy(b, ((*[1 << 16]byte)(unsafe.Pointer(t.xfer.buffer)))[:n])
-
-	//C.print_xfer(t.xfer)
-	/*
-		buf, offset := ((*[1 << 16]byte)(unsafe.Pointer(t.xfer.buffer))), 0
-		for i, pkt := range *t.pkts {
-			log.Printf("Type is %T", t.pkts)
-			n += copy(b[n:], buf[offset:][:pkt.actual_length])
-			offset += pkt.Length
-			if pkt.status != 0 && err == nil {
-				err = error(TransferStatus(pkt.status))
-			}
-		}
-	*/
-	var status uint8
-	n = int(C.extract_data(t.xfer, unsafe.Pointer(&b[0]), C.int(len(b)), (*C.uchar)(unsafe.Pointer(&status))))
-	if status != 0 {
-		err = TransferStatus(status)
-	}
-	return n, err
-}
-
-func (t *Transfer) Close() error {
-	C.libusb_free_transfer(t.xfer)
-	return nil
-}
-
-func isochronous_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
-	t := e.allocTransfer()
-	defer t.Close()
-
-	if err := t.Submit(timeout); err != nil {
-		log.Printf("iso: xfer failed to submit: %s", err)
-		return 0, err
-	}
-
-	n, err := t.Wait(buf)
-	if err != nil {
-		log.Printf("iso: xfer failed: %s", err)
-		return 0, err
-	}
-	return n, err
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/misc.go b/vendor/github.com/karalabe/gousb/usb/misc.go
deleted file mode 100644
index 6e25431bf..000000000
--- a/vendor/github.com/karalabe/gousb/usb/misc.go
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package usb
-
-import (
-	"fmt"
-)
-
-type BCD uint16
-
-const (
-	USB_2_0 BCD = 0x0200
-	USB_1_1 BCD = 0x0110
-	USB_1_0 BCD = 0x0100
-)
-
-func (d BCD) Int() (i int) {
-	ten := 1
-	for o := uint(0); o < 4; o++ {
-		n := ((0xF << (o * 4)) & d) >> (o * 4)
-		i += int(n) * ten
-		ten *= 10
-	}
-	return
-}
-
-func (d BCD) String() string {
-	return fmt.Sprintf("%02x.%02x", int(d>>8), int(d&0xFF))
-}
-
-type ID uint16
-
-func (id ID) String() string {
-	return fmt.Sprintf("%04x", int(id))
-}
diff --git a/vendor/github.com/karalabe/gousb/usb/usb.go b/vendor/github.com/karalabe/gousb/usb/usb.go
deleted file mode 100644
index 366827e69..000000000
--- a/vendor/github.com/karalabe/gousb/usb/usb.go
+++ /dev/null
@@ -1,178 +0,0 @@
-// Copyright 2013 Google Inc.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package usb provides a wrapper around libusb-1.0.
-package usb
-
-/*
-#cgo CFLAGS: -I../internal/libusb/libusb
-#cgo CFLAGS: -DDEFAULT_VISIBILITY=""
-#cgo linux CFLAGS: -DOS_LINUX -D_GNU_SOURCE -DPOLL_NFDS_TYPE=int
-#cgo darwin CFLAGS: -DOS_DARWIN -DPOLL_NFDS_TYPE=int
-#cgo darwin LDFLAGS: -framework CoreFoundation -framework IOKit -lobjc
-#cgo openbsd CFLAGS: -DOS_OPENBSD -DPOLL_NFDS_TYPE=int
-#cgo windows CFLAGS: -DOS_WINDOWS -DUSE_USBDK -DPOLL_NFDS_TYPE=int
-
-#if defined(OS_LINUX) || defined(OS_DARWIN) || defined(OS_OPENBSD)
-	#include <sys/poll.h>
-	#include "os/threads_posix.c"
-	#include "os/poll_posix.c"
-#elif defined(OS_WINDOWS)
-	#include "os/threads_windows.c"
-	#include "os/poll_windows.c"
-#endif
-
-#ifdef OS_LINUX
-	#include "os/linux_usbfs.c"
-	#include "os/linux_netlink.c"
-#elif OS_DARWIN
-	#include "os/darwin_usb.c"
-#elif OS_OPENBSD
-	#include "os/openbsd_usb.c"
-#elif OS_WINDOWS
-	#include "os/windows_nt_common.c"
-	#include "os/windows_usbdk.c"
-#endif
-
-#include "core.c"
-#include "descriptor.c"
-#include "hotplug.c"
-#include "io.c"
-#include "strerror.c"
-#include "sync.c"
-*/
-import "C"
-
-import (
-	"log"
-	"reflect"
-	"unsafe"
-)
-
-type Context struct {
-	ctx  *C.libusb_context
-	done chan struct{}
-}
-
-func (c *Context) Debug(level int) {
-	C.libusb_set_debug(c.ctx, C.int(level))
-}
-
-func NewContext() (*Context, error) {
-	c := &Context{
-		done: make(chan struct{}),
-	}
-
-	if errno := C.libusb_init(&c.ctx); errno != 0 {
-		return nil, usbError(errno)
-	}
-
-	go func() {
-		tv := C.struct_timeval{
-			tv_sec:  0,
-			tv_usec: 100000,
-		}
-		for {
-			select {
-			case <-c.done:
-				return
-			default:
-			}
-			if errno := C.libusb_handle_events_timeout_completed(c.ctx, &tv, nil); errno < 0 {
-				log.Printf("handle_events: error: %s", usbError(errno))
-				continue
-			}
-			//log.Printf("handle_events returned")
-		}
-	}()
-
-	return c, nil
-}
-
-// ListDevices calls each with each enumerated device.
-// If the function returns true, the device is opened and a Device is returned if the operation succeeds.
-// Every Device returned (whether an error is also returned or not) must be closed.
-// If there are any errors enumerating the devices,
-// the final one is returned along with any successfully opened devices.
-func (c *Context) ListDevices(each func(desc *Descriptor) bool) ([]*Device, error) {
-	var list **C.libusb_device
-	cnt := C.libusb_get_device_list(c.ctx, &list)
-	if cnt < 0 {
-		return nil, usbError(cnt)
-	}
-	defer C.libusb_free_device_list(list, 1)
-
-	var slice []*C.libusb_device
-	*(*reflect.SliceHeader)(unsafe.Pointer(&slice)) = reflect.SliceHeader{
-		Data: uintptr(unsafe.Pointer(list)),
-		Len:  int(cnt),
-		Cap:  int(cnt),
-	}
-
-	var reterr error
-	var ret []*Device
-	for _, dev := range slice {
-		desc, err := newDescriptor(dev)
-		if err != nil {
-			reterr = err
-			continue
-		}
-
-		if each(desc) {
-			var handle *C.libusb_device_handle
-			if errno := C.libusb_open(dev, &handle); errno != 0 {
-				reterr = usbError(errno)
-				continue
-			}
-			if dev, err := newDevice(handle, desc); err != nil {
-				reterr = err
-			} else {
-				ret = append(ret, dev)
-			}
-		}
-	}
-	return ret, reterr
-}
-
-// OpenDeviceWithVidPid opens Device from specific VendorId and ProductId.
-// If there are any errors, it'll returns at second value.
-func (c *Context) OpenDeviceWithVidPid(vid, pid int) (*Device, error) {
-
-	handle := C.libusb_open_device_with_vid_pid(c.ctx, (C.uint16_t)(vid), (C.uint16_t)(pid))
-	if handle == nil {
-		return nil, ERROR_NOT_FOUND
-	}
-
-	dev := C.libusb_get_device(handle)
-	if dev == nil {
-		return nil, ERROR_NO_DEVICE
-	}
-
-	desc, err := newDescriptor(dev)
-
-	// return an error from nil-handle and nil-device
-	if err != nil {
-		return nil, err
-	}
-	return newDevice(handle, desc)
-}
-
-func (c *Context) Close() error {
-	close(c.done)
-	if c.ctx != nil {
-		C.libusb_exit(c.ctx)
-	}
-	c.ctx = nil
-	return nil
-}