From 5ac0166388ac9a493491a30fbc3570f23950dc51 Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Sun, 7 Feb 2016 21:48:40 +0000
Subject: qeditor: port to the new hwstub library and add features

This commit adds support for the version of the hwstub library, which requires
a lot of changes. It also adds some editing features, such as register access
and much better editing of fields using the mouse (double click on a field
to be able to resize and move it).

Change-Id: I3c4e4cc855cb44911c72bc8127bad841b68efe52
---
 utils/imxtools/misc/map.h                  |   2 +-
 utils/regtools/qeditor/backend.cpp         | 553 +++++++++++++++++++--------
 utils/regtools/qeditor/backend.h           | 141 +++++--
 utils/regtools/qeditor/mainwindow.cpp      |  38 +-
 utils/regtools/qeditor/qeditor.pro         |   3 +-
 utils/regtools/qeditor/regdisplaypanel.cpp |  35 +-
 utils/regtools/qeditor/regedit.cpp         | 136 +++++--
 utils/regtools/qeditor/regedit.h           |   5 +
 utils/regtools/qeditor/regtab.cpp          |  38 +-
 utils/regtools/qeditor/utils.cpp           | 594 +++++++++++++++++++++++++----
 utils/regtools/qeditor/utils.h             | 178 ++++++++-
 11 files changed, 1394 insertions(+), 329 deletions(-)

(limited to 'utils')

diff --git a/utils/imxtools/misc/map.h b/utils/imxtools/misc/map.h
index b94875ff6d..6143f91912 100644
--- a/utils/imxtools/misc/map.h
+++ b/utils/imxtools/misc/map.h
@@ -79,7 +79,7 @@ struct soc_t
 #define PIN_GROUP_PREFIX_NONE   ""
 
 #define R(group,name,block) {PIN_GROUP_PREFIX_##group name, PIN_GROUP_##group, block}
-#define Q(group,block,name) R(group,STR(block)"_"name, block)
+#define Q(group,block,name) R(group,STR(block) "_" name, block)
 #define P(group,name) R(group,name,PIN_NO_BLOCK)
 
 #define IO      P(GPIO,"gpio")
diff --git a/utils/regtools/qeditor/backend.cpp b/utils/regtools/qeditor/backend.cpp
index 5f006b0aa7..a8264c6e50 100644
--- a/utils/regtools/qeditor/backend.cpp
+++ b/utils/regtools/qeditor/backend.cpp
@@ -22,6 +22,7 @@
 #include <QTextStream>
 #include <QDebug>
 #include <QFileInfo>
+#include <QFont>
 #include "backend.h"
 
 /**
@@ -337,110 +338,436 @@ QString FileIoBackend::GetFileName()
 
 #ifdef HAVE_HWSTUB
 /**
- * HWStubDevice
+ * HWStubManager
  */
-HWStubDevice::HWStubDevice(struct libusb_device *dev)
+HWStubManager *HWStubManager::g_inst = nullptr;
+
+HWStubManager::HWStubManager()
 {
-    Init(dev);
+    Add("Default", QString::fromStdString(hwstub::uri::default_uri().full_uri()));
 }
 
-HWStubDevice::HWStubDevice(const HWStubDevice *dev)
+HWStubManager::~HWStubManager()
 {
-    Init(dev->m_dev);
 }
 
-void HWStubDevice::Init(struct libusb_device *dev)
+HWStubManager *HWStubManager::Get()
 {
-    libusb_ref_device(dev);
-    m_dev = dev;
-    m_handle = 0;
-    m_hwdev = 0;
-    m_valid = Probe();
+    if(g_inst == nullptr)
+        g_inst = new HWStubManager();
+    return g_inst;
 }
 
-HWStubDevice::~HWStubDevice()
+bool HWStubManager::Add(const QString& name, const QString& uri)
+{
+    struct Context ctx;
+    ctx.name = name;
+    ctx.uri = uri;
+    ctx.context = hwstub::uri::create_context(uri.toStdString());
+    if(!ctx.context)
+        return false;
+    ctx.context->start_polling();
+    beginInsertRows(QModelIndex(), m_list.size(), m_list.size());
+    m_list.push_back(ctx);
+    endInsertRows();
+    return true;
+}
+
+void HWStubManager::Clear()
 {
-    Close();
-    libusb_unref_device(m_dev);
+    m_list.clear();
 }
 
-int HWStubDevice::GetBusNumber()
+int HWStubManager::rowCount(const QModelIndex& parent) const
 {
-    return libusb_get_bus_number(m_dev);
+    Q_UNUSED(parent);
+    return m_list.size();
 }
 
-int HWStubDevice::GetDevAddress()
+int HWStubManager::columnCount(const QModelIndex& parent) const
 {
-    return libusb_get_device_address(m_dev);
+    Q_UNUSED(parent);
+    return 2;
 }
 
-bool HWStubDevice::Probe()
+std::shared_ptr< hwstub::context > HWStubManager::GetContext(int row)
 {
-    if(!Open())
-        return false;
-    // get target
-    int ret = hwstub_get_desc(m_hwdev, HWSTUB_DT_TARGET, &m_hwdev_target, sizeof(m_hwdev_target));
-    if(ret != sizeof(m_hwdev_target))
-        goto Lerr;
-    // get STMP information
-    if(m_hwdev_target.dID == HWSTUB_TARGET_STMP)
+    if(row < 0 || (size_t)row >= m_list.size())
+        return std::shared_ptr< hwstub::context >();
+    else
+        return m_list[row].context;
+}
+
+QVariant HWStubManager::data(const QModelIndex& index, int role) const
+{
+    if(index.row() < 0 || (size_t)index.row() >= m_list.size())
+        return QVariant();
+    int section = index.column();
+    const Context& ctx = m_list[index.row()];
+    if(section == GetNameColumn())
     {
-        ret = hwstub_get_desc(m_hwdev, HWSTUB_DT_STMP, &m_hwdev_stmp, sizeof(m_hwdev_stmp));
-        if(ret != sizeof(m_hwdev_stmp))
-            goto Lerr;
+        if(role == Qt::DisplayRole || role == Qt::EditRole)
+            return QVariant(ctx.name);
     }
-    else if(m_hwdev_target.dID == HWSTUB_TARGET_PP)
+    else if(section == GetUriColumn())
     {
-        ret = hwstub_get_desc(m_hwdev, HWSTUB_DT_PP, &m_hwdev_pp, sizeof(m_hwdev_pp));
-        if(ret != sizeof(m_hwdev_pp))
-            goto Lerr;
+        if(role == Qt::DisplayRole)
+            return QVariant(ctx.uri);
     }
-    Close();
-    return true;
+    return QVariant();
+}
 
-    Lerr:
-    Close();
-    return false;
+QVariant HWStubManager::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if(orientation == Qt::Vertical)
+        return QVariant();
+    if(role != Qt::DisplayRole)
+        return QVariant();
+    if(section == GetNameColumn())
+        return QVariant("Name");
+    else if(section == GetUriColumn())
+        return QVariant("URI");
+    return QVariant();
+}
+
+Qt::ItemFlags HWStubManager::flags(const QModelIndex& index) const
+{
+    Qt::ItemFlags flags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+    int section = index.column();
+    if(section == GetNameColumn())
+        flags |= Qt::ItemIsEditable;
+    return flags;
 }
 
-bool HWStubDevice::Open()
+bool HWStubManager::setData(const QModelIndex& index, const QVariant& value, int role)
 {
-    if(libusb_open(m_dev, &m_handle))
+    if(role != Qt::EditRole)
         return false;
-    m_hwdev = hwstub_open(m_handle);
-    if(m_hwdev == 0)
-    {
-        libusb_close(m_handle);
-        m_handle = 0;
+    if(index.row() < 0 || (size_t)index.row() >= m_list.size())
         return false;
-    }
+    if(index.column() != GetNameColumn())
+        return false;
+    m_list[index.row()].name = value.toString();
+    emit dataChanged(index, index);
     return true;
 }
 
-void HWStubDevice::Close()
+int HWStubManager::GetNameColumn() const
 {
-    if(m_hwdev)
-        hwstub_release(m_hwdev);
-    m_hwdev = 0;
-    if(m_handle)
-        libusb_close(m_handle);
-    m_handle = 0;
+    return 0;
 }
 
-bool HWStubDevice::ReadMem(soc_addr_t addr, size_t length, void *buffer)
+int HWStubManager::GetUriColumn() const
+{
+    return 1;
+}
+
+QString HWStubManager::GetFriendlyName(std::shared_ptr< hwstub::device > device)
+{
+    /* try to open the device */
+    std::shared_ptr< hwstub::handle > handle;
+    hwstub::error err = device->open(handle);
+    if(err != hwstub::error::SUCCESS)
+        goto Lfallback;
+    /* get target descriptor */
+    struct hwstub_target_desc_t target_desc;
+    err = handle->get_target_desc(target_desc);
+    if(err != hwstub::error::SUCCESS)
+        goto Lfallback;
+    return QString::fromStdString(target_desc.bName);
+
+    /* fallback: don't open the device */
+Lfallback:
+    hwstub::usb::device *udev = dynamic_cast< hwstub::usb::device* >(device.get());
+    if(udev)
+    {
+        return QString("USB Bus %1 Device %2: ID %3:%4")
+            .arg(udev->get_bus_number()).arg(udev->get_address(), 3, 10, QChar('0'))
+            .arg(udev->get_vid(), 4, 16, QChar('0')).arg(udev->get_pid(), 4, 16, QChar('0'));
+    }
+    else
+        return QString("<Unknown device>");
+}
+
+/**
+ * HWStubContextModel
+ */
+HWStubContextModel::HWStubContextModel(QObject *parent)
+    :QAbstractTableModel(parent), m_has_dummy(false)
+{
+}
+
+HWStubContextModel::~HWStubContextModel()
+{
+    SetContext(std::shared_ptr< hwstub::context >());
+}
+
+void HWStubContextModel::SetContext(std::shared_ptr< hwstub::context > context)
+{
+    int first_row = m_has_dummy ? 1: 0;
+    /* clear previous model if any */
+    if(m_list.size() > 0)
+    {
+        beginRemoveRows(QModelIndex(), first_row, first_row + m_list.size() - 1);
+        m_list.clear();
+        endRemoveRows();
+    }
+    /* don't forget to unregister callback if context still exists */
+    std::shared_ptr< hwstub::context > ctx = m_context.lock();
+    if(ctx)
+        ctx->unregister_callback(m_callback_ref);
+    /* get new context */
+    m_context = context;
+    if(context)
+    {
+        /* register new callback */
+        m_callback_ref = context->register_callback(
+            std::bind(&HWStubContextModel::OnDevChangeLow, this, std::placeholders::_1,
+                std::placeholders::_2, std::placeholders::_3));
+        /* get dev list */
+        std::vector< std::shared_ptr< hwstub::device > > list;
+        hwstub::error err = context->get_device_list(list);
+        if(err == hwstub::error::SUCCESS)
+        {
+            beginInsertRows(QModelIndex(), first_row, first_row + list.size() - 1);
+            for(auto& d : list)
+            {
+                Device dev;
+                dev.name = GetFriendlyName(d);
+                dev.device = d;
+                m_list.push_back(dev);
+            }
+            endInsertRows();
+        }
+    }
+}
+
+void HWStubContextModel::EnableDummy(bool en, const QString& text)
+{
+    /* if needed, create/remove raw */
+    if(m_has_dummy && !en)
+    {
+        /* remove row */
+        beginRemoveRows(QModelIndex(), 0, 0);
+        m_has_dummy = false;
+        endRemoveRows();
+    }
+    else if(!m_has_dummy && en)
+    {
+        /* add row */
+        beginInsertRows(QModelIndex(), 0, 0);
+        m_has_dummy = true;
+        m_dummy_text = text;
+        endInsertRows();
+    }
+    else if(en)
+    {
+        /* text change only */
+        emit dataChanged(index(0, GetNameColumn()), index(0, GetNameColumn()));
+    }
+}
+
+int HWStubContextModel::rowCount(const QModelIndex& parent) const
+{
+    Q_UNUSED(parent);
+    return m_list.size() + (m_has_dummy ? 1 : 0);
+}
+
+int HWStubContextModel::columnCount(const QModelIndex& parent) const
+{
+    Q_UNUSED(parent);
+    return 1;
+}
+
+QVariant HWStubContextModel::data(const QModelIndex& index, int role) const
+{
+    int first_row = m_has_dummy ? 1: 0;
+    /* special case for dummy */
+    if(m_has_dummy && index.row() == 0)
+    {
+        int section = index.column();
+        if(section == GetNameColumn())
+        {
+            if(role == Qt::DisplayRole)
+                return QVariant(m_dummy_text);
+            else if(role == Qt::FontRole)
+            {
+                QFont font;
+                font.setItalic(true);
+                return QVariant(font);
+            }
+        }
+        return QVariant();
+    }
+
+    if(index.row() < first_row || (size_t)index.row() >= first_row + m_list.size())
+        return QVariant();
+    int section = index.column();
+    if(section == GetNameColumn())
+    {
+        if(role == Qt::DisplayRole)
+            return QVariant(m_list[index.row() - first_row].name);
+    }
+    return QVariant();
+}
+
+QVariant HWStubContextModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if(orientation == Qt::Vertical)
+        return QVariant();
+    if(role != Qt::DisplayRole)
+        return QVariant();
+    if(section == GetNameColumn())
+        return QVariant("Friendly name");
+    return QVariant();
+}
+
+Qt::ItemFlags HWStubContextModel::flags(const QModelIndex& index) const
+{
+    Q_UNUSED(index);
+    return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+}
+
+int HWStubContextModel::GetNameColumn() const
+{
+    return 0;
+}
+
+std::shared_ptr< hwstub::device > HWStubContextModel::GetDevice(int row)
+{
+    int first_row = m_has_dummy ? 1: 0;
+    /* special case for dummy */
+    if(row < first_row || (size_t)row >= first_row + m_list.size())
+        return std::shared_ptr< hwstub::device >();
+    else
+        return m_list[row - first_row].device;
+}
+
+QString HWStubContextModel::GetFriendlyName(std::shared_ptr< hwstub::device > device)
 {
-    if(!m_hwdev)
+    return HWStubManager::GetFriendlyName(device);
+}
+
+namespace
+{
+    struct dev_change_t
+    {
+        std::shared_ptr< hwstub::context > ctx;
+        bool arrived;
+        std::shared_ptr< hwstub::device > device;
+    };
+}
+
+void HWStubContextModel::OnDevChangeLow(std::shared_ptr< hwstub::context > ctx,
+    bool arrived, std::shared_ptr< hwstub::device > device)
+{
+    /* calling Qt function from non-Qt thread is unsafe. Since the polling thread
+     * is a pthread, the safest way to use Qt invoke mecanism to make it run
+     * on the event loop */
+    dev_change_t *evt = new dev_change_t;
+    evt->ctx = ctx;
+    evt->arrived = arrived;
+    evt->device = device;
+    QMetaObject::invokeMethod(this, "OnDevChangeUnsafe", Q_ARG(void *, (void *)evt));
+}
+
+void HWStubContextModel::OnDevChangeUnsafe(void *data)
+{
+    dev_change_t *evt = (dev_change_t *)data;
+    OnDevChange(evt->ctx, evt->arrived, evt->device);
+    delete evt;
+}
+
+void HWStubContextModel::OnDevChange(std::shared_ptr< hwstub::context > ctx, bool arrived,
+    std::shared_ptr< hwstub::device > device)
+{
+    int first_row = m_has_dummy ? 1: 0;
+    Q_UNUSED(ctx);
+    if(arrived)
+    {
+        Device dev;
+        dev.name = GetFriendlyName(device);
+        dev.device = device;
+        beginInsertRows(QModelIndex(), first_row + m_list.size(),
+            first_row + m_list.size());
+        m_list.push_back(dev);
+        endInsertRows();
+    }
+    else
+    {
+        /* find device in the list */
+        auto it = m_list.begin();
+        int idx = 0;
+        for(; it != m_list.end(); ++it, ++idx)
+            if(it->device == device)
+                break;
+        if(it == m_list.end())
+            return;
+        /* remove it */
+        beginRemoveRows(QModelIndex(), first_row + idx, first_row + idx);
+        m_list.erase(it);
+        endRemoveRows();
+    }
+}
+
+/**
+ * HWStubDevice
+ */
+HWStubDevice::HWStubDevice(std::shared_ptr< hwstub::device > device)
+{
+    m_valid = Probe(device);
+}
+
+HWStubDevice::~HWStubDevice()
+{
+}
+
+bool HWStubDevice::Probe(std::shared_ptr<hwstub::device> device)
+{
+    if(!device)
         return false;
-    int ret = hwstub_rw_mem_atomic(m_hwdev, 1, addr, buffer, length);
-    return ret >= 0 && (size_t)ret == length;
+    hwstub::error err = device->open(m_handle);
+    if(err != hwstub::error::SUCCESS)
+        return false;
+    // get target information
+    err = m_handle->get_target_desc(m_hwdev_target);
+    if(err != hwstub::error::SUCCESS)
+        return false;
+    // get STMP/PP information
+    if(m_hwdev_target.dID == HWSTUB_TARGET_STMP)
+    {
+        err = m_handle->get_stmp_desc(m_hwdev_stmp);
+        if(err != hwstub::error::SUCCESS)
+            return false;
+    }
+    else if(m_hwdev_target.dID == HWSTUB_TARGET_PP)
+    {
+        err = m_handle->get_pp_desc(m_hwdev_pp);
+        if(err != hwstub::error::SUCCESS)
+            return false;
+    }
+    else if(m_hwdev_target.dID == HWSTUB_TARGET_JZ)
+    {
+        err = m_handle->get_jz_desc(m_hwdev_jz);
+        if(err != hwstub::error::SUCCESS)
+            return false;
+    }
+    m_name = HWStubManager::GetFriendlyName(device);
+    return true;
+}
+
+bool HWStubDevice::ReadMem(soc_addr_t addr, size_t length, void *buffer)
+{
+    size_t len = length;
+    hwstub::error err = m_handle->read(addr, buffer, len, true);
+    return err == hwstub::error::SUCCESS && len == length;
 }
 
 bool HWStubDevice::WriteMem(soc_addr_t addr, size_t length, void *buffer)
 {
-    if(!m_hwdev)
-        return false;
-    int ret = hwstub_rw_mem_atomic(m_hwdev, 0, addr, buffer, length);
-    return ret >= 0 && (size_t)ret == length;
+    size_t len = length;
+    hwstub::error err = m_handle->write(addr, buffer, len, true);
+    return err == hwstub::error::SUCCESS && len == length;
 }
 
 bool HWStubDevice::IsValid()
@@ -448,6 +775,10 @@ bool HWStubDevice::IsValid()
     return m_valid;
 }
 
+QString HWStubDevice::GetFriendlyName()
+{
+    return m_name;
+}
 
 /**
  * HWStubIoBackend
@@ -456,7 +787,7 @@ bool HWStubDevice::IsValid()
 HWStubIoBackend::HWStubIoBackend(HWStubDevice *dev)
 {
     m_dev = dev;
-    m_dev->Open();
+
     struct hwstub_target_desc_t target = m_dev->GetTargetInfo();
     if(target.dID == HWSTUB_TARGET_STMP)
     {
@@ -470,6 +801,13 @@ HWStubIoBackend::HWStubIoBackend(HWStubDevice *dev)
         else
             m_soc = QString("stmp%1").arg(stmp.wChipID, 4, 16, QChar('0'));
     }
+    else if(target.dID == HWSTUB_TARGET_JZ)
+    {
+        struct hwstub_jz_desc_t jz = m_dev->GetJZInfo();
+        m_soc = QString("jz%1").arg(jz.wChipID, 4, 16, QChar('0'));
+        if(jz.bRevision != 0)
+            m_soc.append(QChar(jz.bRevision).toLower());
+    }
     else if(target.dID == HWSTUB_TARGET_RK27)
         m_soc = "rk27x";
     else if(target.dID == HWSTUB_TARGET_PP)
@@ -549,95 +887,6 @@ bool HWStubIoBackend::Reload()
     return true;
 }
 
-/**
- * HWStubBackendHelper
- */
-HWStubBackendHelper::HWStubBackendHelper()
-{
-#ifdef LIBUSB_NO_HOTPLUG
-    m_hotplug = false;
-#else
-    m_hotplug = libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG);
-    if(m_hotplug)
-    {
-        int evt = LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED |
-            LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT;
-        m_hotplug = LIBUSB_SUCCESS == libusb_hotplug_register_callback(
-            NULL, (libusb_hotplug_event)evt, LIBUSB_HOTPLUG_ENUMERATE,
-            LIBUSB_HOTPLUG_MATCH_ANY, LIBUSB_HOTPLUG_MATCH_ANY, LIBUSB_HOTPLUG_MATCH_ANY,
-            &HWStubBackendHelper::HotPlugCallback, reinterpret_cast< void* >(this),
-            &m_hotplug_handle);
-    }
-#endif /* LIBUSB_NO_HOTPLUG */
-}
-
-HWStubBackendHelper::~HWStubBackendHelper()
-{
-#ifndef LIBUSB_NO_HOTPLUG
-    if(m_hotplug)
-        libusb_hotplug_deregister_callback(NULL, m_hotplug_handle);
-#endif /* LIBUSB_NO_HOTPLUG */
-}
-
-QList< HWStubDevice* > HWStubBackendHelper::GetDevList()
-{
-    QList< HWStubDevice* > list;
-    libusb_device **dev_list;
-    ssize_t cnt = hwstub_get_device_list(NULL, &dev_list);
-    for(int i = 0; i < cnt; i++)
-    {
-        HWStubDevice *dev = new HWStubDevice(dev_list[i]);
-        /* filter out non-hwstub devices */
-        if(dev->IsValid())
-            list.push_back(dev);
-        else
-            delete dev;
-    }
-    libusb_free_device_list(dev_list, 1);
-    return list;
-}
-
-#ifndef LIBUSB_NO_HOTPLUG
-void HWStubBackendHelper::OnHotPlug(bool arrived, struct libusb_device *dev)
-{
-    /* signal it */
-    emit OnDevListChanged(arrived, dev);
-}
-
-int HWStubBackendHelper::HotPlugCallback(struct libusb_context *ctx, struct libusb_device *dev,
-    libusb_hotplug_event event, void *user_data)
-{
-    Q_UNUSED(ctx);
-    HWStubBackendHelper *helper = reinterpret_cast< HWStubBackendHelper* >(user_data);
-    switch(event)
-    {
-        case LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED: helper->OnHotPlug(true, dev); break;
-        case LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT: helper->OnHotPlug(false, dev); break;
-        default: break;
-    }
-    return 0;
-}
-#endif /* LIBUSB_NO_HOTPLUG */
-
-bool HWStubBackendHelper::HasHotPlugSupport()
-{
-    return m_hotplug;
-}
-
-namespace
-{
-class lib_usb_init
-{
-public:
-    lib_usb_init()
-    {
-        libusb_init(NULL);
-    }
-};
-
-lib_usb_init __lib_usb_init;
-}
-
 #endif /* HAVE_HWSTUB */
 
 /**
diff --git a/utils/regtools/qeditor/backend.h b/utils/regtools/qeditor/backend.h
index 17eeb44533..19e2cb5616 100644
--- a/utils/regtools/qeditor/backend.h
+++ b/utils/regtools/qeditor/backend.h
@@ -28,7 +28,9 @@
 #include <QMetaType>
 #include <QAbstractItemModel>
 #ifdef HAVE_HWSTUB
-#include "hwstub.h"
+#include "hwstub.hpp"
+#include "hwstub_usb.hpp"
+#include "hwstub_uri.hpp"
 #endif
 #include "soc_desc.hpp"
 
@@ -139,41 +141,124 @@ protected:
 };
 
 #ifdef HAVE_HWSTUB
+/* HWStub context manager: provides a centralized place to add/remove/get
+ * contexts */
+class HWStubManager : public QAbstractTableModel
+{
+    Q_OBJECT
+protected:
+    HWStubManager();
+public:
+    virtual ~HWStubManager();
+    /* Get manager */
+    static HWStubManager *Get();
+    /* Clear the context list */
+    void Clear();
+    bool Add(const QString& name, const QString& uri);
+    /* Model */
+    virtual int rowCount(const QModelIndex& parent = QModelIndex()) const;
+    virtual int columnCount(const QModelIndex& parent = QModelIndex()) const;
+    virtual QVariant data(const QModelIndex& index, int role) const;
+    virtual QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+    virtual Qt::ItemFlags flags(const QModelIndex& index) const;
+    virtual bool setData(const QModelIndex& index, const QVariant& value, int role);
+    /* return predefined columns */
+    int GetNameColumn() const;
+    int GetUriColumn() const;
+    std::shared_ptr< hwstub::context > GetContext(int row);
+    /* return a friendly name for a device */
+    static QString GetFriendlyName(std::shared_ptr< hwstub::device > device);
+
+protected:
+    struct Context
+    {
+        std::shared_ptr< hwstub::context > context;
+        QString name;
+        QString uri;
+    };
+
+    std::vector< Context > m_list; /* list of context */
+    static HWStubManager *g_inst; /* unique instance */
+};
+
+/* HWStub context model: provides access to the device list using Qt MVC model. */
+class HWStubContextModel : public QAbstractTableModel
+{
+    Q_OBJECT
+public:
+    HWStubContextModel(QObject *parent = 0);
+    virtual ~HWStubContextModel();
+    void SetContext(std::shared_ptr< hwstub::context > context);
+    /* Model */
+    virtual int rowCount(const QModelIndex& parent = QModelIndex()) const;
+    virtual int columnCount(const QModelIndex& parent = QModelIndex()) const;
+    virtual QVariant data(const QModelIndex& index, int role) const;
+    virtual QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+    virtual Qt::ItemFlags flags(const QModelIndex& index) const;
+    /* return predefined columns */
+    int GetNameColumn() const;
+    std::shared_ptr< hwstub::device > GetDevice(int row);
+    /* Add an entry in the model for "no selection", which will correspond to
+     * a dummy device. This function also allows the text to be customised. */
+    void EnableDummy(bool en, const QString& text = "");
+
+private slots:
+    void OnDevChangeUnsafe(void *data);
+protected:
+    QString GetFriendlyName(std::shared_ptr< hwstub::device > device);
+    void OnDevChangeLow(std::shared_ptr< hwstub::context > ctx, bool arrived,
+        std::shared_ptr< hwstub::device > device);
+    void OnDevChange(std::shared_ptr< hwstub::context > ctx, bool arrived,
+        std::shared_ptr< hwstub::device > device);
+
+    struct Device
+    {
+        QString name;
+        std::shared_ptr< hwstub::device > device;
+    };
+
+    std::vector< Device > m_list;
+    std::weak_ptr< hwstub::context > m_context;
+    hwstub::context::callback_ref_t m_callback_ref;
+    bool m_has_dummy;
+    QString m_dummy_text;
+};
+
+/* Abstract Virtual Class from where TCP and USB backend
+ * child classes are derived
+ */
 class HWStubDevice
 {
 public:
-    HWStubDevice(struct libusb_device *dev);
-    HWStubDevice(const HWStubDevice *dev);
-    ~HWStubDevice();
+    HWStubDevice(std::shared_ptr<hwstub::device> device);
+    virtual ~HWStubDevice();
+
+    QString GetFriendlyName();
     bool IsValid();
-    bool Open();
-    void Close();
-    int GetBusNumber();
-    int GetDevAddress();
-    /* Calls below are cached and do not require the device to be opened */
+    /* Calls below are cached */
     inline struct hwstub_version_desc_t GetVersionInfo() { return m_hwdev_ver; }
     inline struct hwstub_target_desc_t GetTargetInfo() { return m_hwdev_target; }
     inline struct hwstub_stmp_desc_t GetSTMPInfo() { return m_hwdev_stmp; }
     inline struct hwstub_pp_desc_t GetPPInfo() { return m_hwdev_pp; }
-    /* Calls below require the device to be opened */
+    inline struct hwstub_jz_desc_t GetJZInfo() { return m_hwdev_jz; }
     bool ReadMem(soc_addr_t addr, size_t length, void *buffer);
     bool WriteMem(soc_addr_t addr, size_t length, void *buffer);
 
 protected:
-    bool Probe();
-    void Init(struct libusb_device *dev);
+    bool Probe(std::shared_ptr<hwstub::device> device);
 
+    std::shared_ptr<hwstub::handle> m_handle;
     bool m_valid;
-    struct libusb_device *m_dev;
-    libusb_device_handle *m_handle;
     struct hwstub_device_t *m_hwdev;
     struct hwstub_version_desc_t m_hwdev_ver;
     struct hwstub_target_desc_t m_hwdev_target;
     struct hwstub_stmp_desc_t m_hwdev_stmp;
     struct hwstub_pp_desc_t m_hwdev_pp;
+    struct hwstub_jz_desc_t m_hwdev_jz;
+    QString m_name;
 };
 
-/** NOTE the HWStub backend is never dirty: all writes are immediately committed */
+/** NOTE the HWStub backend is never dirty: all wrnew ites are immediately committed */
 class HWStubIoBackend : public IoBackend
 {
     Q_OBJECT
@@ -197,32 +282,6 @@ protected:
     QString m_soc;
     HWStubDevice *m_dev;
 };
-
-#if LIBUSB_API_VERSION < 0x01000102
-#define LIBUSB_NO_HOTPLUG
-#endif
-
-class HWStubBackendHelper : public QObject
-{
-    Q_OBJECT
-public:
-    HWStubBackendHelper();
-    ~HWStubBackendHelper();
-    bool HasHotPlugSupport();
-    QList< HWStubDevice* > GetDevList();
-
-signals:
-    void OnDevListChanged(bool arrived, struct libusb_device *dev);
-
-protected:
-#ifndef LIBUSB_NO_HOTPLUG
-    void OnHotPlug(bool arrived, struct libusb_device *dev);
-    static int HotPlugCallback(struct libusb_context *ctx, struct libusb_device *dev,
-        libusb_hotplug_event event, void *user_data);
-    libusb_hotplug_callback_handle m_hotplug_handle;
-#endif
-    bool m_hotplug;
-};
 #endif
 
 class SocFile
diff --git a/utils/regtools/qeditor/mainwindow.cpp b/utils/regtools/qeditor/mainwindow.cpp
index 8b83be6bae..69138a91b7 100644
--- a/utils/regtools/qeditor/mainwindow.cpp
+++ b/utils/regtools/qeditor/mainwindow.cpp
@@ -107,12 +107,18 @@ void DocumentTabWidget::OnCloseTab(int index)
 MainWindow::MainWindow(Backend *backend)
     :m_backend(backend)
 {
-    QAction *new_regtab_act = new QAction(QIcon::fromTheme("document-new"), tr("Register &Tab"), this);
-    QAction *new_regedit_act = new QAction(QIcon::fromTheme("document-edit"), tr("Register &Editor"), this);
-    QAction *load_desc_act = new QAction(QIcon::fromTheme("document-open"), tr("&Soc Description"), this);
-    QAction *quit_act = new QAction(QIcon::fromTheme("application-exit"), tr("&Quit"), this);
-    QAction *about_act = new QAction(QIcon::fromTheme("help-about"), tr("&About"), this);
-    QAction *about_qt_act = new QAction(QIcon::fromTheme("help-about"), tr("About &Qt"), this);
+    QAction *new_regtab_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::DocumentNew),
+        tr("Register &Tab"), this);
+    QAction *new_regedit_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::DocumentEdit),
+        tr("Register &Editor"), this);
+    QAction *load_desc_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::DocumentOpen),
+        tr("&Soc Description"), this);
+    QAction *quit_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::ApplicationExit),
+        tr("&Quit"), this);
+    QAction *about_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::HelpAbout),
+        tr("&About"), this);
+    QAction *about_qt_act = new QAction(YIconManager::Get()->GetIcon(YIconManager::HelpAbout),
+        tr("About &Qt"), this);
 
     connect(new_regtab_act, SIGNAL(triggered()), this, SLOT(OnNewRegTab()));
     connect(new_regedit_act, SIGNAL(triggered()), this, SLOT(OnNewRegEdit()));
@@ -121,9 +127,10 @@ MainWindow::MainWindow(Backend *backend)
     connect(about_act, SIGNAL(triggered()), this, SLOT(OnAbout()));
     connect(about_qt_act, SIGNAL(triggered()), this, SLOT(OnAboutQt()));
 
-    QMenu *file_menu = menuBar()->addMenu(tr("&File"));
-    QMenu *new_submenu = file_menu->addMenu(QIcon::fromTheme("document-new"), "&New");
-    QMenu *load_submenu = file_menu->addMenu(QIcon::fromTheme("document-open"), "&Load");
+    QMenu *app_menu = new QMenu;
+    QMenu *file_menu = app_menu->addMenu(tr("&File"));
+    QMenu *new_submenu = file_menu->addMenu(YIconManager::Get()->GetIcon(YIconManager::DocumentNew), "&New");
+    QMenu *load_submenu = file_menu->addMenu(YIconManager::Get()->GetIcon(YIconManager::DocumentOpen), "&Load");
     file_menu->addAction(quit_act);
 
     new_submenu->addAction(new_regtab_act);
@@ -131,17 +138,24 @@ MainWindow::MainWindow(Backend *backend)
 
     load_submenu->addAction(load_desc_act);
 
-    QMenu *about_menu = menuBar()->addMenu(tr("&About"));
+    QMenu *about_menu = app_menu->addMenu(tr("&About"));
     about_menu->addAction(about_act);
     about_menu->addAction(about_qt_act);
 
     m_tab = new DocumentTabWidget();
     m_tab->setTabOpenable(true);
     m_tab->setTabOpenMenu(new_submenu);
+    m_tab->setOtherMenu(app_menu);
 
     setCentralWidget(m_tab);
 
     ReadSettings();
+#ifdef HAVE_HWSTUB
+    /* acquire hwstub manager */
+    HWStubManager::Get()->setParent(this);
+#endif
+    /* acquire icon manager */
+    YIconManager::Get()->setParent(this);
 
     OnNewRegTab();
 }
@@ -167,12 +181,12 @@ void MainWindow::OnAbout()
         .arg(soc_desc::MINOR_VERSION).arg(soc_desc::REVISION_VERSION);
     QMessageBox::about(this, "About", 
         "<h1>QEditor</h1>"
-        "<h2>Version "APP_VERSION"</h2>"
+        "<h2>Version " APP_VERSION "</h2>"
         "<p>Written by Amaury Pouly</p>"
         "<p>Libraries:</p>"
         "<ul><li>soc_desc: " + soc_desc_ver + "</li>"
 #ifdef HAVE_HWSTUB
-        "<li>hwstub: "HWSTUB_VERSION"</li>"
+        "<li>hwstub: " HWSTUB_VERSION "</li>"
 #else
         "<li>hwstub: not compiled in</li>"
 #endif
diff --git a/utils/regtools/qeditor/qeditor.pro b/utils/regtools/qeditor/qeditor.pro
index 0ec7c3dde1..5414f34e72 100644
--- a/utils/regtools/qeditor/qeditor.pro
+++ b/utils/regtools/qeditor/qeditor.pro
@@ -5,8 +5,9 @@ HEADERS += mainwindow.h backend.h regtab.h analyser.h settings.h \
 SOURCES += main.cpp mainwindow.cpp regtab.cpp backend.cpp analyser.cpp \
     std_analysers.cpp settings.cpp utils.cpp regdisplaypanel.cpp regedit.cpp
 LIBS += -L../lib/ -lsocdesc -lxml2
-INCLUDEPATH += ../include/ ../../hwstub/lib
+INCLUDEPATH += ../include/ ../../hwstub/include
 DEPENDPATH += ../
+CONFIG += c++11
 
 libsocdesc.commands = cd ../lib && make
 QMAKE_EXTRA_TARGETS += libsocdesc
diff --git a/utils/regtools/qeditor/regdisplaypanel.cpp b/utils/regtools/qeditor/regdisplaypanel.cpp
index a72d280d6c..1c2f1db9a9 100644
--- a/utils/regtools/qeditor/regdisplaypanel.cpp
+++ b/utils/regtools/qeditor/regdisplaypanel.cpp
@@ -46,7 +46,7 @@ SocDisplayPanel::SocDisplayPanel(QWidget *parent, IoBackend *io_backend,
     right_layout->addWidget(m_desc, 0);
     right_layout->addStretch(1);
 
-    setTitle("System-on-Chip Description");
+    setTitle("");
     setLayout(right_layout);
 }
 
@@ -108,7 +108,7 @@ NodeDisplayPanel::NodeDisplayPanel(QWidget *parent, IoBackend *io_backend,
     right_layout->addWidget(m_inst_desc, 0);
     right_layout->addStretch(1);
 
-    setTitle("Device Description");
+    setTitle("");
     setLayout(right_layout);
 }
 
@@ -126,6 +126,21 @@ QWidget *NodeDisplayPanel::GetWidget()
  * RegDisplayPanel
  */
 
+namespace
+{
+    QString access_string(soc_desc::access_t acc, QString dflt = "")
+    {
+        switch(acc)
+        {
+            case soc_desc::UNSPECIFIED: return dflt;
+            case soc_desc::READ_ONLY: return "Read only";
+            case soc_desc::READ_WRITE: return "Read-write";
+            case soc_desc::WRITE_ONLY: return "Write-only";
+            default: return "";
+        }
+    }
+}
+
 RegDisplayPanel::RegDisplayPanel(QWidget *parent, IoBackend *io_backend,
         const soc_desc::node_inst_t& ref)
     :QGroupBox(parent), m_io_backend(io_backend), m_node(ref), m_reg_font(font())
@@ -139,16 +154,18 @@ RegDisplayPanel::RegDisplayPanel(QWidget *parent, IoBackend *io_backend,
     m_reg_font.setKerning(false);
 
     QString reg_name = helper.GetPath(ref);
-    QStringList names;
+    QStringList names, access;
     QVector< soc_addr_t > addresses;
     names.append(reg_name);
     addresses.append(ref.addr());
+    access.append(access_string(ref.node().reg().get()->access));
 
     std::vector< soc_desc::variant_ref_t > variants = ref.node().reg().variants();
     for(size_t i = 0; i < variants.size(); i++)
     {
         names.append(reg_name + "/" + QString::fromStdString(variants[i].get()->type));
         addresses.append(ref.addr() + variants[i].get()->offset);
+        access.append(access_string(ref.node().reg().get()->access, access[0]));
     }
 
     QString str;
@@ -169,10 +186,20 @@ RegDisplayPanel::RegDisplayPanel(QWidget *parent, IoBackend *io_backend,
     label_addr->setTextFormat(Qt::RichText);
     label_addr->setText(str_addr);
 
+    QString str_acc;
+    str_acc += "<table align=left>";
+    for(int i = 0; i < names.size(); i++)
+        str_acc += "<tr><td><b>" + access[i] + "</b></td></tr>";
+    str_acc += "</table>";
+    QLabel *label_access = new QLabel;
+    label_access->setTextFormat(Qt::RichText);
+    label_access->setText(str_acc);
+
     QHBoxLayout *top_layout = new QHBoxLayout;
     top_layout->addStretch();
     top_layout->addWidget(label_names);
     top_layout->addWidget(label_addr);
+    top_layout->addWidget(label_access);
     top_layout->addStretch();
 
     m_raw_val_name = new QLabel;
@@ -250,7 +277,7 @@ RegDisplayPanel::RegDisplayPanel(QWidget *parent, IoBackend *io_backend,
     right_layout->addWidget(m_value_table);
     right_layout->addStretch();
 
-    setTitle("Register Description");
+    setTitle("");
     m_viewport = new QWidget;
     m_viewport->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     m_viewport->setLayout(right_layout);
diff --git a/utils/regtools/qeditor/regedit.cpp b/utils/regtools/qeditor/regedit.cpp
index 826452fdbd..bf86792c1e 100644
--- a/utils/regtools/qeditor/regedit.cpp
+++ b/utils/regtools/qeditor/regedit.cpp
@@ -107,14 +107,15 @@ SocEditPanel::SocEditPanel(const soc_desc::soc_ref_t& ref, QWidget *parent)
     for(size_t i = 0; i < authors.size(); i++)
     {
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", SocEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", SocEditPanelDelType);
+        item->setToolTip("Remove this author");
         item->setFlags(Qt::ItemIsEnabled);
         m_authors_list->setItem(i, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(authors[i]));
         m_authors_list->setItem(i, 1, item);
     }
     QTableWidgetItem *new_item = new QTableWidgetItem(
-        QIcon::fromTheme("list-add"), "", SocEditPanelAddType);
+        YIconManager::Get()->GetIcon(YIconManager::ListAdd), "", SocEditPanelAddType);
     new_item->setFlags(Qt::ItemIsEnabled);
     m_authors_list->setItem(authors.size(), 0, new_item);
     new_item = new QTableWidgetItem("New author...", QTableWidgetItem::UserType);
@@ -188,7 +189,8 @@ void SocEditPanel::OnAuthorActivated(QTableWidgetItem *item)
         m_ref.get()->author.push_back("Anonymous");
         m_authors_list->insertRow(row);
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", SocEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", SocEditPanelDelType);
+        item->setToolTip("Remove this author");
         item->setFlags(Qt::ItemIsEnabled);
         m_authors_list->setItem(row, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(m_ref.get()->author.back()));
@@ -386,7 +388,8 @@ NodeInstanceEditPanel::NodeInstanceEditPanel(const soc_desc::node_ref_t& ref,
     for(size_t i = 0; i < addrs.size(); i++)
     {
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", NodeInstEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", NodeInstEditPanelDelType);
+        item->setToolTip("Remove this address");
         item->setFlags(Qt::ItemIsEnabled);
         addr_list->setItem(i, 0, item);
         item = new QTableWidgetItem();
@@ -394,7 +397,7 @@ NodeInstanceEditPanel::NodeInstanceEditPanel(const soc_desc::node_ref_t& ref,
         addr_list->setItem(i, 1, item);
     }
     QTableWidgetItem *new_item = new QTableWidgetItem(
-        QIcon::fromTheme("list-add"), "", NodeInstEditPanelAddType);
+        YIconManager::Get()->GetIcon(YIconManager::ListAdd), "", NodeInstEditPanelAddType);
     new_item->setFlags(Qt::ItemIsEnabled);
     addr_list->setItem(addrs.size(), 0, new_item);
     new_item = new QTableWidgetItem("New address...", QTableWidgetItem::UserType);
@@ -535,7 +538,8 @@ void NodeInstanceEditPanel::OnAddressActivated(QTableWidgetItem *item)
         GetInstance().range.list.push_back(new_addr);
         table->insertRow(row);
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", NodeInstEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", NodeInstEditPanelDelType);
+        item->setToolTip("Remove this address");
         item->setFlags(Qt::ItemIsEnabled);
         table->setItem(row, 0, item);
         item = new QTableWidgetItem();
@@ -828,7 +832,8 @@ RegFieldEditPanel::RegFieldEditPanel(const soc_desc::field_ref_t& ref, QWidget *
     for(size_t i = 0; i  < field.enum_.size(); i++)
     {
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", RegFieldEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", RegFieldEditPanelDelType);
+        item->setToolTip("Remove this enum");
         item->setFlags(Qt::ItemIsEnabled);
         m_enum_table->setItem(i, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(field.enum_[i].name));
@@ -840,7 +845,7 @@ RegFieldEditPanel::RegFieldEditPanel(const soc_desc::field_ref_t& ref, QWidget *
         m_enum_table->setItem(i, 3, item);
     }
     QTableWidgetItem *new_item = new QTableWidgetItem(
-        QIcon::fromTheme("list-add"), "", RegFieldEditPanelAddType);
+        YIconManager::Get()->GetIcon(YIconManager::ListAdd), "", RegFieldEditPanelAddType);
     new_item->setFlags(Qt::ItemIsEnabled);
     m_enum_table->setItem(field.enum_.size(), 0, new_item);
     new_item = new QTableWidgetItem("New field...");
@@ -875,6 +880,13 @@ void RegFieldEditPanel::UpdateWidth()
     m_range_validator->setWidth(m_ref.reg().get()->width);
 }
 
+void RegFieldEditPanel::UpdateRange()
+{
+    soc_desc::field_t *field = m_ref.get();
+    m_range_edit->setText(m_range_validator->generate(
+        field->pos + field->width - 1, field->pos));
+}
+
 void RegFieldEditPanel::OnFieldValueActivated(QTableWidgetItem *item)
 {
     if(item->type() == RegFieldEditPanelDelType)
@@ -895,7 +907,8 @@ void RegFieldEditPanel::OnFieldValueActivated(QTableWidgetItem *item)
         field.enum_.push_back(new_enum);
         m_enum_table->insertRow(row);
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", RegFieldEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", RegFieldEditPanelDelType);
+        item->setToolTip("Remove this enum");
         item->setFlags(Qt::ItemIsEnabled);
         m_enum_table->setItem(row, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(new_enum.name));
@@ -977,7 +990,7 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
 
     m_value_model = new RegFieldTableModel(this); // view takes ownership
     m_value_model->SetRegister(*ref.get());
-    m_value_model->SetReadOnly(true);
+    m_value_model->SetReadOnly(false);
 
     m_sexy_display2 = new Unscroll<YRegDisplay>(this);
     m_sexy_display2->setFont(m_reg_font);
@@ -1016,29 +1029,61 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
     width_group_layout->addWidget(reg_size_32);
     width_group_layout->addWidget(reg_size_16);
     width_group_layout->addWidget(reg_size_8);
-    width_group_layout->addStretch(0);
     QGroupBox *width_group = new QGroupBox("Width");
     width_group->setLayout(width_group_layout);
 
+    m_reg_access_group = new QButtonGroup(this);
+    QRadioButton *reg_dflt = new QRadioButton("Unspecified");
+    QRadioButton *reg_rw = new QRadioButton("Read-Write");
+    QRadioButton *reg_ro = new QRadioButton("Read-Only");
+    QRadioButton *reg_wo = new QRadioButton("Write-Only");
+    m_reg_access_group->addButton(reg_dflt, soc_desc::UNSPECIFIED);
+    m_reg_access_group->addButton(reg_rw, soc_desc::READ_WRITE);
+    m_reg_access_group->addButton(reg_ro, soc_desc::READ_ONLY);
+    m_reg_access_group->addButton(reg_wo, soc_desc::WRITE_ONLY);
+    if(m_reg_access_group->button(m_ref.get()->access))
+        m_reg_access_group->button(m_ref.get()->access)->click();
+    QVBoxLayout *access_group_layout = new QVBoxLayout;
+    access_group_layout->addWidget(reg_dflt);
+    access_group_layout->addWidget(reg_rw);
+    access_group_layout->addWidget(reg_ro);
+    access_group_layout->addWidget(reg_wo);
+    QGroupBox *access_group = new QGroupBox("Access");
+    access_group->setLayout(access_group_layout);
+
+    QVBoxLayout *width_access_layout = new QVBoxLayout;
+    width_access_layout->addWidget(width_group);
+    width_access_layout->addWidget(access_group);
+    width_access_layout->addStretch(0);
+
     m_variant_table = new QTableWidget;
-    m_variant_table->setColumnCount(3);
+    m_variant_table->setColumnCount(4);
     m_variant_table->setHorizontalHeaderItem(0, new QTableWidgetItem(""));
     m_variant_table->setHorizontalHeaderItem(1, new QTableWidgetItem("Type"));
     m_variant_table->setHorizontalHeaderItem(2, new QTableWidgetItem("Offset"));
+    m_variant_table->setHorizontalHeaderItem(3, new QTableWidgetItem("Access"));
     m_variant_table->verticalHeader()->setVisible(false);
     m_variant_table->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     m_variant_delegate = new SocFieldItemDelegate(this);
     m_variant_delegate->setItemEditorFactory(new QItemEditorFactory);
-    m_variant_editor = new SocFieldEditorCreator;
-    m_variant_delegate->itemEditorFactory()->registerEditor(QVariant::UInt, m_variant_editor);
+    m_variant_delegate->itemEditorFactory()->registerEditor(QVariant::UInt,
+        new SocFieldEditorCreator);
     m_variant_table->setItemDelegate(m_variant_delegate);
+    m_access_delegate = new SocAccessItemDelegate("Unspecified", this);
+    m_access_delegate->setItemEditorFactory(new QItemEditorFactory);
+    // FIXME see QTBUG-30392
+    m_access_delegate->itemEditorFactory()->registerEditor(
+        (QVariant::Type)qMetaTypeId< soc_desc::access_t >(),
+        new SocAccessEditorCreator);
+    m_variant_table->setItemDelegateForColumn(3, m_access_delegate);
 
     std::vector< soc_desc::variant_ref_t > variants = m_ref.variants();
     m_variant_table->setRowCount(variants.size() + 1);
     for(size_t i = 0; i  < variants.size(); i++)
     {
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", RegVariantEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", RegVariantEditPanelDelType);
+        item->setToolTip("Remove this variant");
         item->setFlags(Qt::ItemIsEnabled);
         m_variant_table->setItem(i, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(variants[i].get()->type));
@@ -1046,9 +1091,12 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
         item = new QTableWidgetItem();
         item->setData(Qt::EditRole, QVariant(variants[i].get()->offset));
         m_variant_table->setItem(i, 2, item);
+        item = new QTableWidgetItem();
+        item->setData(Qt::EditRole, QVariant::fromValue(variants[i].get()->access));
+        m_variant_table->setItem(i, 3, item);
     }
     QTableWidgetItem *new_item = new QTableWidgetItem(
-        QIcon::fromTheme("list-add"), "", RegVariantEditPanelAddType);
+        YIconManager::Get()->GetIcon(YIconManager::ListAdd), "", RegVariantEditPanelAddType);
     new_item->setFlags(Qt::ItemIsEnabled);
     m_variant_table->setItem(variants.size(), 0, new_item);
     new_item = new QTableWidgetItem("New variant...");
@@ -1069,7 +1117,7 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
     m_desc_edit->SetTextHtml(QString::fromStdString(ref.get()->desc));
 
     QHBoxLayout *top_info_layout = new QHBoxLayout;
-    top_info_layout->addWidget(width_group);
+    top_info_layout->addLayout(width_access_layout);
     top_info_layout->addWidget(Misc::EncloseInBox("Variants", m_variant_table));
     top_info_layout->addWidget(Misc::EncloseInBox("Description", m_desc_edit));
 
@@ -1087,9 +1135,9 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
     main_layout->addWidget(m_view_tab, 2);
 
     m_delete_action = new QAction("&Delete", this);
-    m_delete_action->setIcon(QIcon::fromTheme("list-remove"));
+    m_delete_action->setIcon(YIconManager::Get()->GetIcon(YIconManager::ListRemove));
     m_new_action = new QAction("&New field", this);
-    m_new_action->setIcon(QIcon::fromTheme("list-add"));
+    m_new_action->setIcon(YIconManager::Get()->GetIcon(YIconManager::ListAdd));
 
     setLayout(main_layout);
 
@@ -1101,6 +1149,7 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
     connect(m_sexy_display2, SIGNAL(customContextMenuRequested(QPoint)), this,
         SLOT(OnRegDisplayContextMenu(QPoint)));
     connect(m_reg_size_group, SIGNAL(buttonClicked(int)), this, SLOT(OnWidthChanged(int)));
+    connect(m_reg_access_group, SIGNAL(buttonClicked(int)), this, SLOT(OnAccessChanged(int)));
     connect(m_delete_action, SIGNAL(triggered()), this, SLOT(OnRegFieldDelete()));
     connect(m_new_action, SIGNAL(triggered()), this, SLOT(OnRegFieldNew()));
     connect(m_variant_table, SIGNAL(itemActivated(QTableWidgetItem *)), this,
@@ -1110,6 +1159,7 @@ RegEditPanel::RegEditPanel(const soc_desc::register_ref_t& ref, QWidget *parent)
     connect(m_desc_edit, SIGNAL(OnTextChanged()), this, SLOT(OnDescEdited()));
     connect(m_fields_tab, SIGNAL(tabCloseRequested(int)), this, SLOT(OnFieldRemove(int)));
     connect(m_fields_tab, SIGNAL(tabOpenRequested()), this, SLOT(OnFieldCreate()));
+    connect(m_value_model, SIGNAL(OnBitrangeModified(int)), this, SLOT(OnBitrangeModified(int)));
 }
 
 void RegEditPanel::UpdateWidthRestrictions()
@@ -1148,6 +1198,22 @@ void RegEditPanel::OnWidthChanged(int w)
     OnModified();
 }
 
+void RegEditPanel::OnBitrangeModified(int index)
+{
+    soc_desc::register_t reg = m_value_model->GetRegister();
+    m_ref.get()->field[index].pos = reg.field[index].pos;
+    m_ref.get()->field[index].width = reg.field[index].width;
+    for(int i = 0; i < m_fields_tab->count(); i++)
+        dynamic_cast< RegFieldEditPanel * >(m_fields_tab->widget(i))->UpdateRange();
+    OnModified();
+}
+
+void RegEditPanel::OnAccessChanged(int acc)
+{
+    m_ref.get()->access = (soc_desc::access_t)acc;
+    OnModified();
+}
+
 void RegEditPanel::OnDescEdited()
 {
     m_ref.get()->desc = m_desc_edit->GetTextHtml().toStdString();
@@ -1169,9 +1235,11 @@ void RegEditPanel::OnVariantActivated(QTableWidgetItem *item)
         soc_desc::variant_t& variant = *m_ref.create_variant().get();
         variant.type = "untyped";
         variant.offset = 0;
+        variant.access = soc_desc::UNSPECIFIED;
         m_variant_table->insertRow(row);
         QTableWidgetItem *item = new QTableWidgetItem(
-            QIcon::fromTheme("list-remove"), "", RegVariantEditPanelDelType);
+            YIconManager::Get()->GetIcon(YIconManager::ListRemove), "", RegVariantEditPanelDelType);
+        item->setToolTip("Remove this variant");
         item->setFlags(Qt::ItemIsEnabled);
         m_variant_table->setItem(row, 0, item);
         item = new QTableWidgetItem(QString::fromStdString(variant.type));
@@ -1179,6 +1247,9 @@ void RegEditPanel::OnVariantActivated(QTableWidgetItem *item)
         item = new QTableWidgetItem();
         item->setData(Qt::EditRole, QVariant(variant.offset));
         m_variant_table->setItem(row, 2, item);
+        item = new QTableWidgetItem();
+        item->setData(Qt::EditRole, QVariant::fromValue(variant.access));
+        m_variant_table->setItem(row, 3, item);
         OnModified();
     }
 }
@@ -1193,6 +1264,8 @@ void RegEditPanel::OnVariantValueChanged(QTableWidgetItem *item)
         var.type = item->text().toStdString();
     else if(item->column() == 2)
         var.offset = item->data(Qt::EditRole).value< soc_word_t >();
+    else if(item->column() == 3)
+        var.access = item->data(Qt::EditRole).value< soc_desc::access_t >();
     OnModified();
 }
 
@@ -1346,20 +1419,22 @@ RegEdit::RegEdit(Backend *backend, QWidget *parent)
     m_file_edit->setReadOnly(true);
     m_file_open = new QToolButton(this);
     m_file_open->setText("Open");
-    m_file_open->setIcon(QIcon::fromTheme("document-open"));
+    m_file_open->setIcon(YIconManager::Get()->GetIcon(YIconManager::DocumentOpen));
     m_file_open->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
     QMenu *file_open_menu = new QMenu(this);
-    QAction *new_act = file_open_menu->addAction(QIcon::fromTheme("document-new"), "New...");
+    QAction *new_act = file_open_menu->addAction(YIconManager::Get()->GetIcon(YIconManager::DocumentNew),
+        "New...");
     m_file_open->setPopupMode(QToolButton::MenuButtonPopup);
     m_file_open->setMenu(file_open_menu);
 
     m_file_save = new QToolButton(this);
     m_file_save->setText("Save");
-    m_file_save->setIcon(QIcon::fromTheme("document-save"));
+    m_file_save->setIcon(YIconManager::Get()->GetIcon(YIconManager::DocumentSave));
     m_file_save->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
     m_file_save->setPopupMode(QToolButton::MenuButtonPopup);
     QMenu *file_save_menu = new QMenu(this);
-    QAction *saveas_act = file_save_menu->addAction(QIcon::fromTheme("document-save-as"), "Save as...");
+    QAction *saveas_act = file_save_menu->addAction(YIconManager::Get()->GetIcon(YIconManager::DocumentSaveAs),
+        "Save as...");
     m_file_save->setMenu(file_save_menu);
 
     QHBoxLayout *file_group_layout = new QHBoxLayout();
@@ -1375,11 +1450,11 @@ RegEdit::RegEdit(Backend *backend, QWidget *parent)
     m_soc_tree->setContextMenuPolicy(Qt::CustomContextMenu);
 
     m_delete_action = new QAction("&Delete", this);
-    m_delete_action->setIcon(QIcon::fromTheme("list-remove"));
+    m_delete_action->setIcon(YIconManager::Get()->GetIcon(YIconManager::ListRemove));
     m_new_action = new QAction("&New", this);
-    m_new_action->setIcon(QIcon::fromTheme("list-add"));
+    m_new_action->setIcon(YIconManager::Get()->GetIcon(YIconManager::ListAdd));
     m_create_action = new QAction("&Create register", this);
-    m_create_action->setIcon(QIcon::fromTheme("folder-new"));
+    m_create_action->setIcon(YIconManager::Get()->GetIcon(YIconManager::FolderNew));
 
     m_splitter->addWidget(m_soc_tree);
     m_splitter->setStretchFactor(0, 0);
@@ -1605,8 +1680,8 @@ QIcon RegEdit::GetIconFromType(int type)
 {
     switch(type)
     {
-        case SocTreeSocType: return QIcon::fromTheme("computer");
-        case SocTreeNodeType: return QIcon::fromTheme("cpu");
+        case SocTreeSocType: return YIconManager::Get()->GetIcon(YIconManager::Computer);
+        case SocTreeNodeType: return YIconManager::Get()->GetIcon(YIconManager::Cpu);
         case SocTreeRegType: return style()->standardIcon(QStyle::SP_ArrowRight);
         default: return QIcon();
     }
@@ -1627,7 +1702,7 @@ void RegEdit::FixupItem(QTreeWidgetItem *item)
     UpdateName(item);
     if(!ValidateName(item->text(0)))
     {
-        item->setIcon(0, QIcon::fromTheme("dialog-error"));
+        item->setIcon(0, YIconManager::Get()->GetIcon(YIconManager::DialogError));
         if(item->text(0).size() == 0)
         {
             MakeItalic(item, true);
@@ -1688,6 +1763,7 @@ void RegEdit::OnSocItemCreate()
         return;
     soc_desc::register_t reg;
     reg.width = 32;
+    reg.access = soc_desc::UNSPECIFIED;
     soc_desc::node_ref_t node = SocTreeItemVal< soc_desc::node_ref_t >(current);
     node.get()->register_.push_back(reg);
     QTreeWidgetItem *reg_item = MakeSocTreeItem(SocTreeRegType, node.reg());
diff --git a/utils/regtools/qeditor/regedit.h b/utils/regtools/qeditor/regedit.h
index 2540500f29..893ec73421 100644
--- a/utils/regtools/qeditor/regedit.h
+++ b/utils/regtools/qeditor/regedit.h
@@ -165,6 +165,7 @@ public:
     RegFieldEditPanel(const soc_desc::field_ref_t& ref, QWidget *parent = 0);
     soc_desc::field_ref_t GetField();
     void UpdateWidth();
+    void UpdateRange();
 
 signals:
     void OnModified();
@@ -203,12 +204,14 @@ protected slots:
     void OnRegFieldDelete();
     void OnRegFieldNew();
     void OnWidthChanged(int size);
+    void OnAccessChanged(int access);
     void OnFieldModified();
     void OnDescEdited();
     void OnVariantActivated(QTableWidgetItem *item);
     void OnVariantValueChanged(QTableWidgetItem *item);
     void OnFieldRemove(int index);
     void OnFieldCreate();
+    void OnBitrangeModified(int index);
 
 protected:
     void DoModify();
@@ -228,8 +231,10 @@ protected:
     QAction *m_delete_action;
     QPoint m_menu_point;
     SocFieldItemDelegate *m_variant_delegate;
+    SocAccessItemDelegate *m_access_delegate;
     SocFieldEditorCreator *m_variant_editor;
     QButtonGroup *m_reg_size_group;
+    QButtonGroup *m_reg_access_group;
 };
 
 class RegEdit : public QWidget, public DocumentTab
diff --git a/utils/regtools/qeditor/regtab.cpp b/utils/regtools/qeditor/regtab.cpp
index 2653908d41..c6a1f41ee9 100644
--- a/utils/regtools/qeditor/regtab.cpp
+++ b/utils/regtools/qeditor/regtab.cpp
@@ -75,10 +75,11 @@ RegTab::RegTab(Backend *backend, QWidget *parent)
     QVBoxLayout *left_layout = new QVBoxLayout;
     left->setLayout(left_layout);
 
-    QGroupBox *top_group = new QGroupBox("SOC selection");
-    QVBoxLayout *top_group_layout = new QVBoxLayout;
+    QGroupBox *top_group = new QGroupBox("");
+    QHBoxLayout *top_group_layout = new QHBoxLayout;
     m_soc_selector = new QComboBox;
-    top_group_layout->addWidget(m_soc_selector);
+    top_group_layout->addWidget(new QLabel("SOC:"));
+    top_group_layout->addWidget(m_soc_selector, 1);
     top_group->setLayout(top_group_layout);
 
     m_reg_tree = new QTreeWidget();
@@ -96,7 +97,7 @@ RegTab::RegTab(Backend *backend, QWidget *parent)
     left_layout->addWidget(m_type_selector);
 
     m_right_panel = new QVBoxLayout;
-    QGroupBox *data_sel_group = new QGroupBox("Data selection");
+    QGroupBox *data_sel_group = new QGroupBox("");
     QHBoxLayout *data_sel_layout = new QHBoxLayout;
     m_backend_selector = new BackendSelector(m_backend, this);
     m_backend_selector->SetNothingMessage("<i>Select a data source to analyse its content.</i>");
@@ -108,6 +109,7 @@ RegTab::RegTab(Backend *backend, QWidget *parent)
     m_data_sel_reload = new QPushButton(this);
     m_data_sel_reload->setIcon(QIcon::fromTheme("view-refresh"));
     m_data_sel_reload->setToolTip("Reload data");
+    data_sel_layout->addWidget(new QLabel("Data:"));
     data_sel_layout->addWidget(m_backend_selector);
     data_sel_layout->addWidget(m_readonly_check);
     data_sel_layout->addWidget(m_data_soc_label);
@@ -146,7 +148,9 @@ RegTab::RegTab(Backend *backend, QWidget *parent)
     connect(m_type_selector, SIGNAL(currentChanged(int)), this, SLOT(OnTypeChanged(int)));
 
     m_msg_select_id = SetMessage(MessageWidget::Information,
-        "You can browse the registers. Select a data source to analyse the values.");
+        "You can browse the registers using the left panel. "
+        "Select a data source at the top to analyse the values. "
+        "You can also use the analyzers available in the left panel, if any.");
     m_msg_error_id = 0;
 
     QList< SocFileRef > socs = m_backend->GetSocFileList();
@@ -215,8 +219,7 @@ void RegTab::UpdateTabName()
     else if(hwstub)
     {
         HWStubDevice *dev = hwstub->GetDevice();
-        SetTabName(QString("HWStub %1.%2").arg(dev->GetBusNumber())
-            .arg(dev->GetDevAddress()));
+        SetTabName(dev->GetFriendlyName());
     }
 #endif
     else
@@ -231,11 +234,21 @@ void RegTab::OnBackendSelect(IoBackend *backend)
     HideMessage(m_msg_select_id);
     HideMessage(m_msg_error_id);
     m_io_backend = backend;
-    SetReadOnlyIndicator();
-    SetDataSocName(m_io_backend->GetSocName());
-    OnDataSocActivated(m_io_backend->GetSocName());
-    OnDataChanged();
-    UpdateTabName();
+    /* Check if the backend is valid, otherwise it might confuse the user */
+    if(m_io_backend->IsValid())
+    {
+        SetReadOnlyIndicator();
+        SetDataSocName(m_io_backend->GetSocName());
+        OnDataSocActivated(m_io_backend->GetSocName());
+        OnDataChanged();
+        UpdateTabName();
+    }
+    /* But don't display it for the dummy backend either */
+    else if(dynamic_cast< DummyIoBackend * >(m_io_backend) == 0)
+    {
+        m_msg_error_id = SetMessage(MessageWidget::Error,
+            "Data source is not available.");
+    }
 }
 
 void RegTab::SetReadOnlyIndicator()
@@ -267,6 +280,7 @@ void RegTab::OnAnalyserClicked(QListWidgetItem *current)
 
 void RegTab::DisplayNode(const soc_desc::node_inst_t& ref)
 {
+    HideMessage(m_msg_select_id);
     if(ref.node().is_root())
         SetPanel(new SocDisplayPanel(this, m_io_backend, ref.soc()));
     else if(ref.node().reg().valid())
diff --git a/utils/regtools/qeditor/utils.cpp b/utils/regtools/qeditor/utils.cpp
index 0d0a7de5ed..748a989512 100644
--- a/utils/regtools/qeditor/utils.cpp
+++ b/utils/regtools/qeditor/utils.cpp
@@ -30,6 +30,9 @@
 #include <QXmlStreamWriter>
 #include <QTextBlock>
 #include <QApplication>
+#include <QPushButton>
+#include <QMessageBox>
+#include <QStandardItemModel>
 
 /**
  * SocBitRangeValidator
@@ -406,6 +409,11 @@ bool SocFieldBitRange::operator<(const SocFieldBitRange& o) const
     return m_last_bit < o.m_last_bit;
 }
 
+bool SocFieldBitRange::operator!=(const SocFieldBitRange& o) const
+{
+    return m_first_bit != o.m_first_bit || m_last_bit != o.m_last_bit;
+}
+
 /**
  * SocFieldCachedItemDelegate
  */
@@ -475,6 +483,53 @@ void SocFieldCachedEditor::setValue(SocFieldCachedValue val)
     setField(m_value.value());
 }
 
+/**
+ * SocAccessItemDelegate
+ */
+QString SocAccessItemDelegate::displayText(const QVariant& value, const QLocale& locale) const
+{
+    if(isUserType< soc_desc::access_t >(value))
+    {
+        soc_desc::access_t acc = value.value< soc_desc::access_t >();
+        switch(acc)
+        {
+            case soc_desc::UNSPECIFIED: return m_unspec_text;
+            case soc_desc::READ_ONLY: return "Read-Only";
+            case soc_desc::READ_WRITE: return "Read-Write";
+            case soc_desc::WRITE_ONLY: return "Write-Only";
+            default: return "<bug>";
+        }
+    }
+    else
+        return QStyledItemDelegate::displayText(value, locale);
+}
+
+/**
+ * SocAccessEditor
+ */
+SocAccessEditor::SocAccessEditor(const QString& unspec_text, QWidget *parent)
+    :QComboBox(parent)
+{
+    addItem(unspec_text, QVariant::fromValue(soc_desc::UNSPECIFIED));
+    addItem("Read-Only", QVariant::fromValue(soc_desc::READ_ONLY));
+    addItem("Read-Write", QVariant::fromValue(soc_desc::READ_WRITE));
+    addItem("Write-Only", QVariant::fromValue(soc_desc::WRITE_ONLY));
+}
+
+SocAccessEditor::~SocAccessEditor()
+{
+}
+
+soc_desc::access_t SocAccessEditor::access() const
+{
+    return itemData(currentIndex()).value< soc_desc::access_t >();
+}
+
+void SocAccessEditor::setAccess(soc_desc::access_t acc)
+{
+    setCurrentIndex(findData(QVariant::fromValue(acc)));
+}
+
 /**
  * SocFieldEditorCreator
  */
@@ -493,6 +548,19 @@ void SocFieldEditorCreator::setWidth(int bitcount)
     m_field.width = bitcount;
 }
 
+/**
+ * SocAccessEditorCreator
+ */
+QWidget *SocAccessEditorCreator::createWidget(QWidget *parent) const
+{
+    return new SocAccessEditor(m_unspec_text, parent);
+}
+
+QByteArray SocAccessEditorCreator::valuePropertyName() const
+{
+    return QByteArray("access");
+}
+
 /**
  * SocFieldCachedEditorCreator
  */
@@ -602,8 +670,22 @@ bool RegFieldTableModel::setData(const QModelIndex& idx, const QVariant& value,
     if(role != Qt::EditRole)
         return false;
     int section = idx.column();
+    if(section == BitRangeColumn)
+    {
+        if(idx.row() < 0 || idx.row() >= rowCount())
+            return false;
+        if(value.type() != QVariant::UserType && value.userType() == qMetaTypeId< SocFieldBitRange >())
+            return false;
+        SocFieldBitRange bitrange = value.value< SocFieldBitRange >();
+        m_reg.field[idx.row()].pos = bitrange.GetFirstBit();
+        m_reg.field[idx.row()].width = bitrange.GetLastBit() - bitrange.GetFirstBit() + 1;
+        emit OnBitrangeModified(idx.row());
+    }
     if(section < FirstValueColumn || section >= FirstValueColumn + m_value.size())
+    {
+        qDebug() << "ignore setData to column " << section;
         return false;
+    }
     section -= FirstValueColumn;
     const SocFieldCachedValue& v = value.value< SocFieldCachedValue >();
     if(!m_value[section].isValid())
@@ -622,7 +704,12 @@ Qt::ItemFlags RegFieldTableModel::flags(const QModelIndex& index) const
     Qt::ItemFlags flags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
     int section = index.column();
     if(section < FirstValueColumn || section >= FirstValueColumn + m_value.size())
+    {
+        /* bitrange or name */
+        if(!m_read_only)
+            flags |= Qt::ItemIsEditable;
         return flags;
+    }
     section -= FirstValueColumn;
     if(m_value[section].isValid() && !m_read_only)
         flags |= Qt::ItemIsEditable;
@@ -763,6 +850,207 @@ bool RegFieldProxyModel::lessThan(const QModelIndex& left,
         return QSortFilterProxyModel::lessThan(left, right);
 }
 
+/**
+ * YRegDisplayItemEditor
+ */
+YRegDisplayItemEditor::YRegDisplayItemEditor(QWidget *parent, YRegDisplay *display,
+        YRegDisplayItemDelegate *delegate, QModelIndex bitrange_index,
+        QModelIndex name_index)
+    :QWidget(parent), m_display_delegate(delegate),
+    m_display(display), m_state(Idle)
+{
+    m_col_width = m_display->BitrangeRect(SocFieldBitRange(0, 0)).width();
+    m_resize_margin = m_col_width / 4;
+    setEditorData(bitrange_index, name_index);
+    setMouseTracking(true);
+    setAutoFillBackground(true);
+    setFocusPolicy(Qt::StrongFocus); // QItemDelegate says it's important
+}
+
+void YRegDisplayItemEditor::setEditorData(QModelIndex bitrange_index, QModelIndex name_index)
+{
+    if(m_state != Idle)
+    {
+        m_state = Idle;
+        QApplication::restoreOverrideCursor();
+    }
+    m_bitrange_index = bitrange_index;
+    m_name_index = name_index;
+    m_bitrange = bitrange_index.data().value< SocFieldBitRange >();
+}
+
+void YRegDisplayItemEditor::getEditorData(QVariant& name, QVariant& bitrange)
+{
+    name = QVariant(); /* don't touch the name */
+    bitrange = QVariant::fromValue(m_bitrange);
+}
+
+YRegDisplayItemEditor::~YRegDisplayItemEditor()
+{
+    /* make sure to restore cursor if modified */
+    if(m_state != Idle)
+    {
+        m_state = Idle;
+        QApplication::restoreOverrideCursor();
+    }
+}
+
+YRegDisplayItemEditor::Zone YRegDisplayItemEditor::GetZone(const QPoint& pt)
+{
+    if(!rect().contains(pt))
+        return NoZone;
+    if(pt.x() >= 0 && pt.x() <= m_resize_margin)
+        return ResizeLeftZone;
+    if(pt.x() >= width() - m_resize_margin && pt.x() <= width())
+        return ResizeRightZone;
+    return MoveZone;
+}
+
+void YRegDisplayItemEditor::mouseMoveEvent(QMouseEvent *event)
+{
+    Zone zone = GetZone(event->pos());
+    bool in_resize_zone = (zone == ResizeLeftZone || zone == ResizeRightZone);
+    /* resizing/moving has priority */
+    if(m_state == ResizingLeft || m_state == ResizingRight || m_state == Moving)
+    {
+        SocFieldBitRange new_bitrange = m_bitrange;
+        if(m_state == Moving)
+        {
+            /* Compute new bitrange: we know the offset of the mouse relative to the
+            * left of the register: use that offset to compute the new position of
+            * the MSB bit. To make it more natural, add half of a column of margin
+            * so that the register does not move until half of a bit column displacement
+            * was made */
+            int bit = m_display->bitColumnAt(mapTo(m_display,
+                event->pos() - QPoint(m_move_offset - m_col_width / 2, 0)));
+            new_bitrange.SetLastBit(bit);
+            int w = m_bitrange.GetLastBit() - m_bitrange.GetFirstBit();
+            /* make sure range is valid */
+            if(bit - w < 0)
+                return;
+            new_bitrange.SetFirstBit(bit - w);
+        }
+        else
+        {
+            /* Compute new bitrange. To make it more natural, add quarter of a column of margin
+            * so that the register does not resize until quarter of a bit column displacement
+            * was made */
+            int bit = m_display->bitColumnAt(mapTo(m_display, event->pos()
+                + QPoint(m_col_width / 4, 0)));
+            if(m_state == ResizingLeft)
+                new_bitrange.SetLastBit(bit);
+            else
+                new_bitrange.SetFirstBit(bit);
+            /* make sure range is valid */
+            if(new_bitrange.GetLastBit() < new_bitrange.GetFirstBit())
+                return;
+        }
+        /* make sure range does not overlap with other fields */
+        /* TODO */
+        /* update current bitrange (display only) and resize widget */
+        if(m_bitrange != new_bitrange)
+        {
+            m_bitrange = new_bitrange;
+            /* resize widget */
+            QRect rect = m_display->BitrangeRect(m_bitrange);
+            rect.moveTopLeft(parentWidget()->mapFromGlobal(m_display->mapToGlobal(rect.topLeft())));
+            setGeometry(rect);
+        }
+    }
+    /* any zone -> resize zone */
+    else if(in_resize_zone)
+    {
+        /* don't do unnecessary changes */
+        if(m_state != InResizeZone)
+        {
+            /* restore old cursor if needed */
+            if(m_state != Idle)
+                QApplication::restoreOverrideCursor();
+            m_state = InResizeZone;
+            QApplication::setOverrideCursor(QCursor(Qt::SizeHorCursor));
+        }
+    }
+    /* any zone -> move zone */
+    else if(zone == MoveZone)
+    {
+        /* don't do unnecessary changes */
+        if(m_state != InMoveZone)
+        {
+            /* restore old cursor if needed */
+            if(m_state != Idle)
+                QApplication::restoreOverrideCursor();
+            m_state = InMoveZone;
+            QApplication::setOverrideCursor(QCursor(Qt::SizeAllCursor));
+        }
+    }
+    /* any zone -> no zone */
+    else if(zone == NoZone)
+    {
+        if(m_state != Idle)
+        {
+            m_state = Idle;
+            QApplication::restoreOverrideCursor();
+        }
+    }
+}
+
+void YRegDisplayItemEditor::leaveEvent(QEvent *event)
+{
+    Q_UNUSED(event);
+    if(m_state == InResizeZone)
+    {
+        m_state = Idle;
+        QApplication::restoreOverrideCursor();
+    }
+}
+
+void YRegDisplayItemEditor::mousePressEvent(QMouseEvent *event)
+{
+    /* just in case the mouseMove event was not done */
+    mouseMoveEvent(event);
+    /* we need to track mouse outside of widget but Qt already grabs the mouse
+     * for us on mouse press in widget */
+    if(m_state == InResizeZone)
+    {
+        if(GetZone(event->pos()) == ResizeLeftZone)
+            m_state = ResizingLeft;
+        else
+            m_state = ResizingRight;
+    }
+    else if(m_state == InMoveZone)
+    {
+        m_state = Moving;
+        /* store offset from the left, to keep relative position of the register
+         * with respect to the mouse */
+        m_move_offset = event->pos().x();
+    }
+}
+
+void YRegDisplayItemEditor::mouseReleaseEvent(QMouseEvent *event)
+{
+    if(m_state == ResizingLeft ||  m_state == ResizingRight || m_state == Moving)
+    {
+        QApplication::restoreOverrideCursor();
+        m_state = Idle;
+        /* update cursor */
+        mouseMoveEvent(event);
+    }
+}
+
+void YRegDisplayItemEditor::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event);
+    QPainter painter(this);
+    /* reuse delegate code to paint */
+    QStyleOptionViewItemV4 opt = m_display->viewOptions();
+    opt.state |= QStyle::State_HasFocus | QStyle::State_Selected | QStyle::State_Active;
+    opt.displayAlignment = Qt::AlignHCenter | Qt::AlignVCenter;
+    opt.rect = rect();
+    opt.showDecorationSelected = true;
+    m_display_delegate->initStyleOption(&opt, m_name_index);
+    m_display_delegate->MyPaint(&painter, opt);
+}
+
 /**
  * YRegDisplayItemDelegate
  */
@@ -772,14 +1060,9 @@ YRegDisplayItemDelegate::YRegDisplayItemDelegate(QObject *parent)
 {
 }
 
- void YRegDisplayItemDelegate::paint(QPainter *painter,
-    const QStyleOptionViewItem& option, const QModelIndex& index) const
+void YRegDisplayItemDelegate::MyPaint(QPainter *painter, const QStyleOptionViewItemV4& option) const
 {
     QStyleOptionViewItemV4 opt = option;
-    // default alignment is centered unless specified
-    opt.displayAlignment = Qt::AlignHCenter | Qt::AlignVCenter;
-    initStyleOption(&opt, index);
-
     painter->save();
     // draw everything rotated, requires careful manipulation of the
     // rects involved
@@ -789,17 +1072,58 @@ YRegDisplayItemDelegate::YRegDisplayItemDelegate(QObject *parent)
     QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
     style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
     painter->restore();
+}
+
+void YRegDisplayItemDelegate::paint(QPainter *painter,
+    const QStyleOptionViewItem& option, const QModelIndex& index) const
+{
+    QStyleOptionViewItemV4 opt = option;
+    // default alignment is centered unless specified
+    opt.displayAlignment = Qt::AlignHCenter | Qt::AlignVCenter;
+    initStyleOption(&opt, index);
+
+    MyPaint(painter, opt);
 
 }
 
 QSize YRegDisplayItemDelegate::sizeHint(const QStyleOptionViewItem& option,
     const QModelIndex& index) const
 {
+    /* useless in our case, the view ignores this */
     Q_UNUSED(option);
     Q_UNUSED(index);
     return QSize();
 }
 
+QWidget *YRegDisplayItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem& option,
+    const QModelIndex& index) const
+{
+    Q_UNUSED(option);
+    Q_UNUSED(index);
+    YRegDisplay *display = dynamic_cast< YRegDisplay* >(parent->parent());
+    Q_ASSERT(display != nullptr);
+    /* column 0 is name, column 1 is range */
+    return new YRegDisplayItemEditor(parent, display, const_cast< YRegDisplayItemDelegate* >(this),
+        index.sibling(index.row(), 0), index.sibling(index.row(), 1));
+}
+
+void YRegDisplayItemDelegate::setEditorData(QWidget *editor, const QModelIndex& index) const
+{
+    dynamic_cast< YRegDisplayItemEditor* >(editor)->setEditorData(
+        index.sibling(index.row(), 0), index.sibling(index.row(), 1));
+}
+
+void YRegDisplayItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
+    const QModelIndex& index) const
+{
+    QVariant name, bitrange;
+    dynamic_cast< YRegDisplayItemEditor* >(editor)->getEditorData(name, bitrange);
+    if(name.isValid())
+        model->setData(index.sibling(index.row(), 1), name);
+    if(bitrange.isValid())
+        model->setData(index.sibling(index.row(), 0), bitrange);
+}
+
 /**
  * YRegDisplay
  */
@@ -814,7 +1138,8 @@ YRegDisplay::YRegDisplay(QWidget *parent)
     // the frame around the register is ugly, disable it
     setFrameShape(QFrame::NoFrame);
     setSelectionMode(SingleSelection);
-    setItemDelegate(new YRegDisplayItemDelegate());
+    setEditTriggers(QAbstractItemView::DoubleClicked | QAbstractItemView::SelectedClicked);
+    setItemDelegate(new YRegDisplayItemDelegate(this));
 }
 
 void YRegDisplay::setWidth(int nr_bits)
@@ -1055,6 +1380,11 @@ QRect YRegDisplay::itemRect(const QModelIndex& index) const
     return itemRect(range, index.column());
 }
 
+QRect YRegDisplay::BitrangeRect(const SocFieldBitRange& range) const
+{
+    return itemRect(range, m_data_col);
+}
+
 QRect YRegDisplay::itemRect(const SocFieldBitRange& range, int col) const
 {
     int top, bot;
@@ -1276,17 +1606,17 @@ MyTextEditor::MyTextEditor(QWidget *parent)
     m_edit->setAutoFormatting(QTextEdit::AutoAll);
 
     m_bold_button = new QToolButton(this);
-    m_bold_button->setIcon(QIcon::fromTheme("format-text-bold"));
+    m_bold_button->setIcon(YIconManager::Get()->GetIcon(YIconManager::FormatTextBold));
     m_bold_button->setText("bold");
     m_bold_button->setCheckable(true);
 
     m_italic_button = new QToolButton(this);
-    m_italic_button->setIcon(QIcon::fromTheme("format-text-italic"));
+    m_italic_button->setIcon(YIconManager::Get()->GetIcon(YIconManager::FormatTextItalic));
     m_italic_button->setText("italic");
     m_italic_button->setCheckable(true);
 
     m_underline_button = new QToolButton(this);
-    m_underline_button->setIcon(QIcon::fromTheme("format-text-underline"));
+    m_underline_button->setIcon(YIconManager::Get()->GetIcon(YIconManager::FormatTextUnderline));
     m_underline_button->setText("underline");
     m_underline_button->setCheckable(true);
 
@@ -1419,10 +1749,13 @@ BackendSelector::BackendSelector(Backend *backend, QWidget *parent)
     :QWidget(parent), m_backend(backend)
 {
     m_data_selector = new QComboBox(this);
-    m_data_selector->addItem(QIcon::fromTheme("text-x-generic"), "Nothing...", QVariant(DataSelNothing));
-    m_data_selector->addItem(QIcon::fromTheme("document-open"), "File...", QVariant(DataSelFile));
+    m_data_selector->addItem(YIconManager::Get()->GetIcon(YIconManager::TextGeneric),
+        "Nothing...", QVariant(DataSelNothing));
+    m_data_selector->addItem(YIconManager::Get()->GetIcon(YIconManager::DocumentOpen),
+        "File...", QVariant(DataSelFile));
 #ifdef HAVE_HWSTUB
-    m_data_selector->addItem(QIcon::fromTheme("multimedia-player"), "Device...", QVariant(DataSelDevice));
+    m_data_selector->addItem(YIconManager::Get()->GetIcon(YIconManager::MultimediaPlayer),
+        "USB Device...", QVariant(DataSelDevice));
 #endif
     m_data_sel_edit = new QLineEdit(this);
     m_data_sel_edit->setReadOnly(true);
@@ -1435,7 +1768,18 @@ BackendSelector::BackendSelector(Backend *backend, QWidget *parent)
     data_sel_layout->addStretch(0);
 #ifdef HAVE_HWSTUB
     m_dev_selector = new QComboBox;
+    m_ctx_model = new HWStubContextModel;
+    m_ctx_model->EnableDummy(true, "Please select a device...");
+    m_dev_selector->setModel(m_ctx_model); /* m_dev_selector will delete m_ctx_model */
+    m_ctx_selector = new QComboBox;
+    m_ctx_manager = HWStubManager::Get();
+    m_ctx_selector->setModel(m_ctx_manager);
+    m_ctx_manage_button = new QPushButton();
+    m_ctx_manage_button->setIcon(YIconManager::Get()->GetIcon(YIconManager::Preferences));
+    m_ctx_manage_button->setToolTip("Manage contexts");
     data_sel_layout->addWidget(m_dev_selector, 1);
+    data_sel_layout->addWidget(m_ctx_selector);
+    data_sel_layout->addWidget(m_ctx_manage_button);
 #endif
 
     m_io_backend = m_backend->CreateDummyIoBackend();
@@ -1443,18 +1787,25 @@ BackendSelector::BackendSelector(Backend *backend, QWidget *parent)
     connect(m_data_selector, SIGNAL(activated(int)),
         this, SLOT(OnDataSelChanged(int)));
 #ifdef HAVE_HWSTUB
-    connect(m_dev_selector, SIGNAL(currentIndexChanged(int)),
-        this, SLOT(OnDevChanged(int)));
-    connect(&m_hwstub_helper, SIGNAL(OnDevListChanged(bool, struct libusb_device *)),
-        this, SLOT(OnDevListChanged2(bool, struct libusb_device *)));
+    connect(m_ctx_selector, SIGNAL(currentIndexChanged(int)), this,
+        SLOT(OnContextSelChanged(int)));
+    connect(m_dev_selector, SIGNAL(currentIndexChanged(int)), this,
+        SLOT(OnDeviceSelChanged(int)));
+    connect(m_dev_selector, SIGNAL(activated(int)), this,
+        SLOT(OnDeviceSelActivated(int)));
+#endif
+
+#ifdef HAVE_HWSTUB
+    OnContextSelChanged(0);
 #endif
     OnDataSelChanged(0);
 }
 
 BackendSelector::~BackendSelector()
 {
+    /* avoid m_ctx_selector from deleting HWStubManager */
 #ifdef HAVE_HWSTUB
-    ClearDevList();
+    m_ctx_selector->setModel(new QStandardItemModel());
 #endif
     delete m_io_backend;
 }
@@ -1475,6 +1826,8 @@ void BackendSelector::OnDataSelChanged(int index)
         m_data_sel_edit->show();
 #ifdef HAVE_HWSTUB
         m_dev_selector->hide();
+        m_ctx_selector->hide();
+        m_ctx_manage_button->hide();
 #endif
         QFileDialog *fd = new QFileDialog(m_data_selector);
         QStringList filters;
@@ -1496,7 +1849,10 @@ void BackendSelector::OnDataSelChanged(int index)
         m_nothing_text->hide();
         m_data_sel_edit->hide();
         m_dev_selector->show();
-        OnDevListChanged();
+        m_ctx_selector->show();
+        m_ctx_manage_button->show();
+        /* explicitely change the backend now */
+        OnDeviceSelActivated(m_dev_selector->currentIndex());
     }
 #endif
     else
@@ -1505,83 +1861,68 @@ void BackendSelector::OnDataSelChanged(int index)
         m_nothing_text->show();
 #ifdef HAVE_HWSTUB
         m_dev_selector->hide();
+        m_ctx_selector->hide();
+        m_ctx_manage_button->hide();
 #endif
 
         ChangeBackend(m_backend->CreateDummyIoBackend());
     }
 }
 
-#ifdef HAVE_HWSTUB
-void BackendSelector::OnDevListChanged2(bool arrived, struct libusb_device *dev)
+IoBackend *BackendSelector::GetBackend()
 {
-    Q_UNUSED(arrived);
-    Q_UNUSED(dev);
-    OnDevListChanged();
+    return m_io_backend;
 }
 
-void BackendSelector::OnDevListChanged()
+void BackendSelector::ChangeBackend(IoBackend *new_backend)
 {
-    ClearDevList();
-    QList< HWStubDevice* > list = m_hwstub_helper.GetDevList();
-    foreach(HWStubDevice *dev, list)
-    {
-        QString name = QString("Bus %1 Device %2: %3").arg(dev->GetBusNumber())
-            .arg(dev->GetDevAddress()).arg(dev->GetTargetInfo().bName);
-        m_dev_selector->addItem(QIcon::fromTheme("multimedia-player"), name,
-            QVariant::fromValue((void *)dev));
-    }
-    if(list.size() > 0)
-        m_dev_selector->setCurrentIndex(0);
+    /* WARNING: delete old backend *after* calling the signal, otherwise the old backend
+     * might get used after delete */
+    emit OnSelect(new_backend);
+    delete m_io_backend;
+    m_io_backend = new_backend;
 }
 
-void BackendSelector::OnDevChanged(int index)
+#ifdef HAVE_HWSTUB
+void BackendSelector::OnContextSelChanged(int index)
 {
+    m_ctx_model->SetContext(m_ctx_manager->GetContext(index));
+    m_dev_selector->setCurrentIndex(0);
+}
+
+void BackendSelector::OnDeviceSelChanged(int index)
+{
+    /* if current selection is -1, because device was removed or a new context
+     * was selected, select entry 0, which is dummy. Not that this will not
+     * call activate(), we don't want to change the current backend if the user
+     * is using another type of backend. */
     if(index == -1)
-        return;
-    HWStubDevice *dev = reinterpret_cast< HWStubDevice* >(m_dev_selector->itemData(index).value< void* >());
-    delete m_io_backend;
-    /* NOTE: make a copy of the HWStubDevice device because the one in the list
-     * might get destroyed when clearing the list while the backend is still
-     * active: this would result in a double free when the backend is also destroyed */
-    m_io_backend = m_backend->CreateHWStubIoBackend(new HWStubDevice(dev));
-    emit OnSelect(m_io_backend);
+        m_dev_selector->setCurrentIndex(0);
 }
 
-void BackendSelector::ClearDevList()
+void BackendSelector::OnDeviceSelActivated(int index)
 {
-    while(m_dev_selector->count() > 0)
+    auto dev = new HWStubDevice(m_ctx_model->GetDevice(index));
+    if(!dev->IsValid())
     {
-        HWStubDevice *dev = reinterpret_cast< HWStubDevice* >(m_dev_selector->itemData(0).value< void* >());
         delete dev;
-        m_dev_selector->removeItem(0);
+        ChangeBackend(m_backend->CreateDummyIoBackend()); 
     }
+    else
+        ChangeBackend(new HWStubIoBackend(dev));
 }
 #endif
 
-IoBackend *BackendSelector::GetBackend()
-{
-    return m_io_backend;
-}
-
-void BackendSelector::ChangeBackend(IoBackend *new_backend)
-{
-    /* WARNING: delete old backend *after* calling the signal, otherwise the old backend
-     * might get used after delete */
-    emit OnSelect(new_backend);
-    delete m_io_backend;
-    m_io_backend = new_backend;
-}
-
 /**
  * YTabWidget
  */
 YTabWidget::YTabWidget(QTabBar *bar, QWidget *parent)
-    :QTabWidget(parent)
+    :QTabWidget(parent), m_other_button(0)
 {
     if(bar != 0)
         setTabBar(bar);
     m_tab_open_button = new QToolButton(this);
-    m_tab_open_button->setIcon(QIcon::fromTheme("list-add"));
+    m_tab_open_button->setIcon(YIconManager::Get()->GetIcon(YIconManager::ListAdd));
     m_tab_open_button->setAutoRaise(true);
     m_tab_open_button->setPopupMode(QToolButton::InstantPopup);
     /* the arrow with an icon only is pretty ugly and QToolButton has no way
@@ -1592,8 +1933,8 @@ YTabWidget::YTabWidget(QTabBar *bar, QWidget *parent)
     connect(m_tab_open_button, SIGNAL(clicked(bool)), this, SLOT(OnOpenButton(bool)));
     /* there is a quirk in the default QStyle: if the tab bar is empty, it
      * returns the minimum size of the corner widget, which is 0 for tool buttons */
-    //setMinimumHeight(m_tab_open_button->height());
-    //m_tab_open_button->setMinimumHeight(m_tab_open_button->sizeHint().height());
+    m_tab_open_button->setMinimumSize(m_tab_open_button->sizeHint());
+    setMinimumSize(m_tab_open_button->sizeHint());
 }
 
 void YTabWidget::setTabOpenable(bool openable)
@@ -1613,6 +1954,28 @@ void YTabWidget::setTabOpenMenu(QMenu *menu)
     m_tab_open_button->setMenu(menu);
 }
 
+void YTabWidget::setOtherMenu(QMenu *menu)
+{
+    if(menu == nullptr)
+    {
+        if(m_other_button)
+            delete m_other_button;
+        m_other_button = nullptr;
+    }
+    else
+    {
+        if(m_other_button == nullptr)
+        {
+            m_other_button = new QToolButton(this);
+            m_other_button->setText("Menu");
+            m_other_button->setAutoRaise(true);
+            m_other_button->setPopupMode(QToolButton::InstantPopup);
+            setCornerWidget(m_other_button, Qt::TopRightCorner);
+        }
+        m_other_button->setMenu(menu);
+    }
+}
+
 /**
  * MessageWidget
  */
@@ -1625,6 +1988,7 @@ MessageWidget::MessageWidget(QWidget *parent)
     m_icon->hide();
     m_text = new QLabel(this);
     m_text->setTextFormat(Qt::RichText);
+    m_text->setWordWrap(true);
     m_close = new QToolButton(this);
     m_close->setText("close");
     m_close->setIcon(style()->standardIcon(QStyle::SP_DialogCloseButton));
@@ -1702,6 +2066,102 @@ void MessageWidget::OnClose(bool clicked)
     hide();
 }
 
+/*
+ * YIconManager
+ */
+YIconManager *YIconManager::m_singleton = nullptr;
+
+YIconManager::YIconManager()
+{
+    m_icon_name[ListAdd] = "list-add";
+    m_icon_name[ListRemove] = "list-remove";
+    m_icon_name[DocumentNew] = "document-new";
+    m_icon_name[DocumentEdit] = "document-edit";
+    m_icon_name[DocumentOpen] = "document-open";
+    m_icon_name[DocumentSave] = "document-save";
+    m_icon_name[DocumentSaveAs] = "document-save-as";
+    m_icon_name[Preferences] = "preferences-system";
+    m_icon_name[FolderNew] = "folder-new";
+    m_icon_name[Computer] = "computer";
+    m_icon_name[Cpu] = "cpu";
+    m_icon_name[DialogError] = "dialog-error";
+    m_icon_name[ViewRefresh] = "view-refresh";
+    m_icon_name[SytemRun] = "system-run";
+    m_icon_name[ApplicationExit] = "application-exit";
+    m_icon_name[HelpAbout] = "help-about";
+    m_icon_name[FormatTextBold] = "format-text-bold";
+    m_icon_name[FormatTextItalic] = "format-text-italic";
+    m_icon_name[FormatTextUnderline] = "format-text-underline";
+    m_icon_name[TextGeneric] = "text-x-generic";
+    m_icon_name[MultimediaPlayer] = "multimedia-player";
+}
+
+YIconManager::~YIconManager()
+{
+}
+
+YIconManager *YIconManager::Get()
+{
+    if(m_singleton == nullptr)
+        m_singleton = new YIconManager();
+    return m_singleton;
+}
+
+QIcon YIconManager::GetIcon(IconType type)
+{
+    if(type < 0 || type >= MaxIcon)
+        return QIcon();
+    if(QIcon::hasThemeIcon(m_icon_name[type]))
+        return QIcon::fromTheme(m_icon_name[type]);
+    /* render icon if needed */
+    if(m_icon[type].isNull())
+        Render(type);
+    return m_icon[type];
+}
+
+namespace
+{
+    void RenderListAdd(QIcon& icon)
+    {
+        QPixmap pix(64, 64);
+        pix.fill(Qt::transparent);
+        QPainter paint(&pix);
+        paint.fillRect(30, 12, 4, 40, QColor(255, 0, 0));
+        paint.fillRect(12, 30, 40, 4, QColor(255, 0, 0));
+        icon = QIcon(pix);
+    }
+
+    void RenderListRemove(QIcon& icon)
+    {
+        QPixmap pix(64, 64);
+        pix.fill(Qt::transparent);
+        QPainter paint(&pix);
+        paint.setPen(QColor(255, 0, 0));
+        paint.drawLine(12, 12, 52, 52);
+        paint.drawLine(12, 52, 52, 16);
+        icon = QIcon(pix);
+    }
+
+    void RenderUnknown(QIcon& icon)
+    {
+        QPixmap pix(64, 64);
+        pix.fill();
+        QPainter paint(&pix);
+        paint.fillRect(0, 0, 64, 64, QColor(255, 0, 0));
+        icon = QIcon(pix);
+    }
+}
+
+void YIconManager::Render(IconType type)
+{
+    switch(type)
+    {
+        case ListAdd: RenderListAdd(m_icon[type]); break;
+        case ListRemove: RenderListRemove(m_icon[type]); break;
+        default: RenderUnknown(m_icon[type]); break;
+    }
+}
+
 /**
  * Misc
  */
diff --git a/utils/regtools/qeditor/utils.h b/utils/regtools/qeditor/utils.h
index 026466fae0..83992274b7 100644
--- a/utils/regtools/qeditor/utils.h
+++ b/utils/regtools/qeditor/utils.h
@@ -40,6 +40,7 @@
 #include <QScrollBar>
 #include <QGroupBox>
 #include <QSortFilterProxyModel>
+#include <QDebug>
 #include "settings.h"
 #include "backend.h"
 
@@ -180,6 +181,50 @@ protected:
     soc_desc::field_t m_field;
 };
 
+Q_DECLARE_METATYPE(soc_desc::access_t)
+
+class SocAccessItemDelegate: public QStyledItemDelegate
+{
+public:
+    SocAccessItemDelegate(const QString& unspec_text, QObject *parent = 0)
+        :QStyledItemDelegate(parent), m_unspec_text(unspec_text) {}
+
+    virtual QString displayText(const QVariant& value, const QLocale& locale) const;
+protected:
+    QString m_unspec_text;
+};
+
+class SocAccessEditor : public QComboBox
+{
+    Q_OBJECT
+    Q_PROPERTY(soc_desc::access_t access READ access WRITE setAccess USER true)
+public:
+    SocAccessEditor(const QString& unspec_text, QWidget *parent = 0);
+    virtual ~SocAccessEditor();
+
+    soc_desc::access_t access() const;
+    void setAccess(soc_desc::access_t acc);
+
+protected slots:
+    /* bla */
+
+protected:
+    soc_desc::access_t m_access;
+};
+
+class SocAccessEditorCreator : public QItemEditorCreatorBase
+{
+public:
+    SocAccessEditorCreator(const QString& unspec_text = "Unspecified")
+        :m_unspec_text(unspec_text) {}
+
+    virtual QWidget *createWidget(QWidget *parent) const;
+    virtual QByteArray valuePropertyName() const;
+
+protected:
+    QString m_unspec_text;
+};
+
 class SocFieldCachedValue
 {
 public:
@@ -209,8 +254,11 @@ public:
     SocFieldBitRange(int first, int last):m_first_bit(first), m_last_bit(last) {}
     unsigned GetFirstBit() const { return m_first_bit; }
     unsigned GetLastBit() const { return m_last_bit; }
+    void SetFirstBit(unsigned bit) { m_first_bit = bit; }
+    void SetLastBit(unsigned bit) { m_last_bit = bit; }
 
     bool operator<(const SocFieldBitRange& o) const;
+    bool operator!=(const SocFieldBitRange& o) const;
 protected:
     unsigned m_first_bit, m_last_bit;
 };
@@ -301,6 +349,7 @@ public:
 
 signals:
     void OnValueModified(int index);
+    void OnBitrangeModified(int index);
 
 protected:
     void RecomputeTheme();
@@ -337,19 +386,79 @@ protected:
     bool lessThan(const QModelIndex& left, const QModelIndex& right) const;
 };
 
+class YRegDisplay;
+class YRegDisplayItemDelegate;
+
+class YRegDisplayItemEditor : public QWidget
+{
+    Q_OBJECT
+public:
+    YRegDisplayItemEditor(QWidget *parent, YRegDisplay *display,
+        YRegDisplayItemDelegate *delegate, QModelIndex bitrange_index,
+        QModelIndex name_index);
+    virtual ~YRegDisplayItemEditor();
+    void setEditorData(QModelIndex bitrange_index, QModelIndex name_index);
+    void getEditorData(QVariant& name, QVariant& birange);
+
+protected:
+    virtual void paintEvent(QPaintEvent *event);
+    virtual void mouseMoveEvent(QMouseEvent *event);
+    virtual void mousePressEvent(QMouseEvent *event);
+    virtual void mouseReleaseEvent(QMouseEvent *event);
+    virtual void leaveEvent(QEvent *event);
+
+    enum Zone
+    {
+        NoZone,
+        MoveZone,
+        ResizeLeftZone,
+        ResizeRightZone
+    };
+
+    Zone GetZone(const QPoint& pt);
+
+    YRegDisplayItemDelegate *m_display_delegate;
+    YRegDisplay *m_display;
+    QModelIndex m_bitrange_index, m_name_index;
+    enum
+    {
+        Idle,
+        InResizeZone,
+        InMoveZone,
+        Moving,
+        ResizingLeft,
+        ResizingRight,
+    }m_state;
+    int m_col_width;
+    int m_resize_margin;
+    int m_move_offset;
+    SocFieldBitRange m_bitrange;
+};
+
 class YRegDisplayItemDelegate : public QStyledItemDelegate
 {
+    Q_OBJECT
+    friend class YRegDisplayItemEditor;
 public:
     YRegDisplayItemDelegate(QObject *parent = 0);
-    virtual void paint(QPainter * painter, const QStyleOptionViewItem& option,
-        const QModelIndex & index) const;
+    virtual void paint(QPainter *painter, const QStyleOptionViewItem& option,
+        const QModelIndex& index) const;
+    virtual void MyPaint(QPainter *painter, const QStyleOptionViewItemV4& option) const;
     virtual QSize sizeHint(const QStyleOptionViewItem& option,
-        const QModelIndex & index) const;
+        const QModelIndex& index) const;
+    /* don't bother using the item factory and such, we only use this delegate
+     * for very specific models anyway */
+    virtual QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem& option,
+        const QModelIndex& index) const;
+    virtual void setEditorData(QWidget *editor, const QModelIndex& index) const;
+    virtual void setModelData(QWidget *editor, QAbstractItemModel *model,
+        const QModelIndex& index) const;
 };
 
 class YRegDisplay : public QAbstractItemView
 {
     Q_OBJECT
+    friend class YRegDisplayItemEditor;
 public:
     YRegDisplay(QWidget *parent = 0);
     virtual QModelIndex indexAt(const QPoint& point) const;
@@ -360,6 +469,8 @@ public:
     void setWidth(int nr_bits);
     /* returns the bit column at a point, or -1 if none except if closest=true */
     int bitColumnAt(const QPoint& point, bool closest = true) const;
+    /* return rect for a bitrange */
+    QRect BitrangeRect(const SocFieldBitRange& range) const;
 
 protected slots:
     virtual void dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight);
@@ -509,18 +620,20 @@ protected:
     QLineEdit *m_data_sel_edit;
 #ifdef HAVE_HWSTUB
     QComboBox *m_dev_selector;
-    HWStubBackendHelper m_hwstub_helper;
+    QComboBox *m_ctx_selector;
+    QPushButton *m_ctx_manage_button;
+    HWStubContextModel *m_ctx_model;
+    HWStubManager *m_ctx_manager;
 #endif
     QLabel *m_nothing_text;
 
 private slots:
+    void OnDataSelChanged(int index);
 #ifdef HAVE_HWSTUB
-    void OnDevListChanged();
-    void OnDevChanged(int index);
-    void OnDevListChanged2(bool, struct libusb_device *);
-    void ClearDevList();
+    void OnContextSelChanged(int index);
+    void OnDeviceSelChanged(int index);
+    void OnDeviceSelActivated(int index);
 #endif
-    void OnDataSelChanged(int index);
 };
 
 class MessageWidget : public QFrame
@@ -567,6 +680,7 @@ public:
     inline bool tabOpenable() const { return m_tab_openable; }
     void setTabOpenable(bool openable);
     void setTabOpenMenu(QMenu *menu);
+    void setOtherMenu(QMenu *menu);
 
 signals:
     void tabOpenRequested();
@@ -577,6 +691,52 @@ protected slots:
 protected:
     bool m_tab_openable;
     QToolButton *m_tab_open_button;
+    QToolButton *m_other_button;
+};
+
+class YIconManager : public QObject
+{
+    Q_OBJECT
+protected:
+    YIconManager();
+public:
+    virtual ~YIconManager();
+    /* list of icons */
+    enum IconType
+    {
+        ListAdd = 0,
+        ListRemove,
+        DocumentNew,
+        DocumentEdit,
+        DocumentOpen,
+        DocumentSave,
+        DocumentSaveAs,
+        Preferences,
+        FolderNew,
+        Computer,
+        Cpu,
+        DialogError,
+        ViewRefresh,
+        SytemRun,
+        ApplicationExit,
+        HelpAbout,
+        FormatTextBold,
+        FormatTextItalic,
+        FormatTextUnderline,
+        TextGeneric,
+        MultimediaPlayer,
+        MaxIcon
+    };
+    /* return instance */
+    static YIconManager *Get();
+    QIcon GetIcon(IconType it);
+
+protected:
+    void Render(IconType type);
+
+    static YIconManager *m_singleton; // single instance
+    QIcon m_icon[MaxIcon]; /* list add icon */
+    QString m_icon_name[MaxIcon]; /* icon name from theme */
 };
 
 class Misc
-- 
cgit