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//=========================================================================//
// //
// PonyProg - Serial Device Programmer //
// //
// Copyright (C) 1997-2021 Claudio Lanconelli //
// //
// Copyright (C) 2019 LibUSB part, Eduard Kalinowski //
// //
// http://ponyprog.sourceforge.net //
// //
//-------------------------------------------------------------------------//
// //
// This program is free software; you can redistribute it and/or //
// modify it under the terms of the GNU General Public License //
// as published by the Free Software Foundation; either version2 of //
// the License, or (at your option) any later version. //
// //
// This program 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 //
// General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program (see LICENSE); if not, write to the //
// Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. //
// //
//=========================================================================//
#include <QDebug>
#include "usbwatcher.h"
static int LIBUSB_CALL hotplug_callback(struct libusb_context *ctx, struct libusb_device *dev,
libusb_hotplug_event event, void *user_data)
{
struct libusb_device_descriptor desc;
(void)libusb_get_device_descriptor(dev, &desc);
USBWatcher *w = static_cast<USBWatcher *>(user_data);
Q_CHECK_PTR(w);
if (LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED == event)
{
w->hotplug_notify(true, desc.idVendor, desc.idProduct);
qDebug() << "Connected VID:PID " << (hex) << desc.idVendor << " - " << desc.idProduct;
}
else if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == event)
{
w->hotplug_notify(false, desc.idVendor, desc.idProduct);
qDebug() << "Disconnected VID:PID " << (hex) << desc.idVendor << " - " << desc.idProduct;
}
return 0;
}
void USBWatcher::doPoll()
{
if (count > 0)
{
if (usb_ctx)
{
struct timeval zero_tv = { .tv_sec = 0, .tv_usec = 0 };
//zero_tv.tv_sec = 1; // timeout 1 sec
int rv = libusb_handle_events_timeout_completed(usb_ctx,
const_cast<timeval *>(&zero_tv),
NULL);
if (rv != LIBUSB_SUCCESS)
{
qWarning() << "libusb_handle_events_timeout_completed() failed: " << rv;
}
}
else
{
//Don't support hotplug, simulate it with a timer event
emit notify(false, 0, 0);
}
}
}
USBWatcher::USBWatcher()
: cbHandle(0),
usb_ctx(0),
timer(0),
count(0)
{
vUSB.clear();
}
USBWatcher::~USBWatcher()
{
hotplug_deregister();
}
void USBWatcher::hotplug_deregister()
{
if (count > 0)
{
if (timer)
{
timer->stop();
delete timer;
}
if (usb_ctx)
{
libusb_hotplug_deregister_callback(usb_ctx, cbHandle);
libusb_exit(usb_ctx);
usb_ctx = 0;
}
count--;
}
}
bool USBWatcher::hotplug_register(quint16 vid, quint16 pid)
{
bool result = false;
if (count == 0)
{
int tval = 1000;
libusb_init(&usb_ctx);
if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG))
{
int rc = libusb_hotplug_register_callback(usb_ctx,
(libusb_hotplug_event)(LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT),
LIBUSB_HOTPLUG_ENUMERATE,
(vid == 0) ? LIBUSB_HOTPLUG_MATCH_ANY : vid,
(pid == 0) ? LIBUSB_HOTPLUG_MATCH_ANY : pid,
LIBUSB_HOTPLUG_MATCH_ANY,
hotplug_callback,
this,
&cbHandle);
if (LIBUSB_SUCCESS != rc)
{
libusb_exit(usb_ctx);
usb_ctx = 0;
}
else
{
tval = 100;
result = true;
}
}
else
{
libusb_exit(usb_ctx);
usb_ctx = 0;
qWarning() << "NO USB HotPlug capability (simulate it with a timer)";
}
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(doPoll()));
timer->start(tval);
count++;
}
return result;
}
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