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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "serenum.h"
#include <QByteArray>
#include <QString>
#include <QDebug>
#include <QFileInfo>
#include <QDir>
#include <usb.h>
QList<SerialPortId> enumerateSerialPorts(int loglevel)
{
QList<QString> eligableInterfaces;
QList<SerialPortId> list;
usb_init();
usb_find_busses();
usb_find_devices();
for (struct usb_bus *bus = usb_get_busses(); bus; bus = bus->next) {
for (struct usb_device *device = bus->devices; device; device = device->next) {
for (int n = 0; n < device->descriptor.bNumConfigurations; ++n) {
struct usb_config_descriptor &usbConfig =device->config[n];
QList<int> usableInterfaces;
for (int m = 0; m < usbConfig.bNumInterfaces; ++m) {
for (int o = 0; o < usbConfig.interface[m].num_altsetting; ++o) {
struct usb_interface_descriptor &descriptor = usbConfig.interface[m].altsetting[o];
if (descriptor.bInterfaceClass != 2 // "Communication"
|| descriptor.bInterfaceSubClass != 2 // Abstract (modem)
|| descriptor.bInterfaceProtocol != 255) // Vendor Specific
continue;
unsigned char *buf = descriptor.extra;
unsigned int size = descriptor.extralen;
while (size >= 2 * sizeof(u_int8_t)) {
// for Communication devices there is a slave interface for the actual
// data transmission.
// the extra info stores that as a index for the interface
if (buf[0] >= 5 && buf[1] == 36 && buf[2] == 6) { // CDC Union
for (int i = 4; i < buf[0]; i++)
usableInterfaces.append((int) buf[i]);
}
size -= buf[0];
buf += buf[0];
}
}
}
if (usableInterfaces.isEmpty())
continue;
QString manufacturerString;
QString productString;
usb_dev_handle *devh = usb_open(device);
if (devh) {
QByteArray buf;
buf.resize(256);
int err = usb_get_string_simple(devh, device->descriptor.iManufacturer, buf.data(), buf.size());
if (err < 0) {
if (loglevel > 1)
qDebug() << " can't read manufacturer name, error:" << err;
} else {
manufacturerString = QString::fromAscii(buf);
if (loglevel > 1)
qDebug() << " manufacturer:" << manufacturerString;
}
buf.resize(256);
err = usb_get_string_simple(devh, device->descriptor.iProduct, buf.data(), buf.size());
if (err < 0) {
if (loglevel > 1)
qDebug() << " can't read product name, error:" << err;
} else {
productString = QString::fromAscii(buf);
if (loglevel > 1)
qDebug() << " product:" << productString;
}
usb_close(devh);
} else if (loglevel > 0) {
qDebug() << " can't open usb device";
}
// second loop to find the actual data interface.
foreach (int i, usableInterfaces) {
for (int m = 0; m < usbConfig.bNumInterfaces; ++m) {
for (int o = 0; o < usbConfig.interface[m].num_altsetting; ++o) {
struct usb_interface_descriptor &descriptor = usbConfig.interface[m].altsetting[o];
if (descriptor.bInterfaceNumber != i)
continue;
if (descriptor.bInterfaceClass == 10) { // "CDC Data"
if (loglevel > 1) {
qDebug() << " found the data port"
<< "bus:" << bus->dirname
<< "device" << device->filename
<< "interface" << descriptor.bInterfaceNumber;
}
// ### manufacturer and product strings are only readable as root :(
if (!manufacturerString.isEmpty() && !productString.isEmpty()) {
eligableInterfaces << QString("usb-%1_%2-if%3")
.arg(manufacturerString.replace(QChar(' '), QChar('_')))
.arg(productString.replace(QChar(' '), QChar('_')))
.arg(i, 2, 16, QChar('0'));
} else {
eligableInterfaces << QString("if%1").arg(i, 2, 16, QChar('0')); // fix!
}
}
}
}
}
}
}
}
if (loglevel > 1)
qDebug() << " searching for interfaces:" << eligableInterfaces;
QDir dir("/dev/serial/by-id/");
foreach (const QFileInfo &info, dir.entryInfoList()) {
if (!info.isDir()) {
bool usable = eligableInterfaces.isEmpty();
foreach (const QString &iface, eligableInterfaces) {
if (info.fileName().contains(iface)) {
if (loglevel > 1)
qDebug() << " found device file:" << info.fileName() << endl;
usable = true;
break;
}
}
if (!usable)
continue;
SerialPortId id;
id.friendlyName = info.fileName();
id.portName = info.canonicalFilePath();
list << id;
}
}
return list;
}
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