utils/regtools: make qeditor able to poke directly at a hwstub device

This commit add the very handy feature of being able to read registers
directly from a device using hwstub. This is mostly trivial using the hwstub
library and the biggest change here is actually:
- being able to read registers by name and/or addresses
- being able to enumerate devives
The UI code currently doesn't handle hotplug but the backend does so it should
be trivial to add in the future. It also opens up the possibility the write
registers from hwstub or save the register values to a file.
Since it relies on both hwstub and libusb, a switch has been introduced in
qmake to disable it (use -config nohwstub).

Change-Id: I5d7d7a2a7c97ecd7407227357c8553c2773ea6cc

1 files changed, 62 insertions, 3 deletions

diff --git a/utils/regtools/qeditor/regtab.cpp b/utils/regtools/qeditor/regtab.cpp
index 4f7a73c..8f64bbf 100644
--- a/utils/regtools/qeditor/regtab.cpp
+++ b/utils/regtools/qeditor/regtab.cpp
@@ -13,6 +13,7 @@
 #include <QTableWidget>
 #include <QHeaderView>
 #include <QFileDialog>
+#include <QDebug>
 #include "backend.h"
 #include "analyser.h"
 
@@ -65,6 +66,9 @@ RegTab::RegTab(Backend *backend, QTabWidget *parent)
     m_data_selector = new QComboBox;
     m_data_selector->addItem(QIcon::fromTheme("face-sad"), "None", QVariant(DataSelNothing));
     m_data_selector->addItem(QIcon::fromTheme("document-open"), "File...", QVariant(DataSelFile));
+#ifdef HAVE_HWSTUB
+    m_data_selector->addItem(QIcon::fromTheme("multimedia-player"), "Device...", QVariant(DataSelDevice));
+#endif
     m_data_sel_edit = new QLineEdit;
     m_data_sel_edit->setReadOnly(true);
     m_data_soc_label = new QLabel;
@@ -72,6 +76,10 @@ RegTab::RegTab(Backend *backend, QTabWidget *parent)
     data_sel_reload->setIcon(QIcon::fromTheme("view-refresh"));
     data_sel_layout->addWidget(m_data_selector);
     data_sel_layout->addWidget(m_data_sel_edit);
+#ifdef HAVE_HWSTUB
+    m_dev_selector = new QComboBox;
+    data_sel_layout->addWidget(m_dev_selector, 1);
+#endif
     data_sel_layout->addWidget(m_data_soc_label);
     data_sel_layout->addWidget(data_sel_reload);
     data_sel_group->setLayout(data_sel_layout);
@@ -107,6 +115,10 @@ RegTab::RegTab(Backend *backend, QTabWidget *parent)
         this, SLOT(OnAnalyserChanged(QListWidgetItem *, QListWidgetItem *)));
     connect(m_analysers_list, SIGNAL(itemClicked(QListWidgetItem *)), this,
         SLOT(OnAnalyserClicked(QListWidgetItem *)));
+#ifdef HAVE_HWSTUB
+    connect(m_dev_selector, SIGNAL(currentIndexChanged(int)),
+        this, SLOT(OnDevChanged(int)));
+#endif
 
     OnSocListChanged();
     OnDataSelChanged(DataSelNothing);
@@ -141,6 +153,10 @@ void RegTab::OnDataSelChanged(int index)
     QVariant var = m_data_selector->itemData(index);
     if(var == DataSelFile)
     {
+        m_data_sel_edit->show();
+#ifdef HAVE_HWSTUB
+        m_dev_selector->hide();
+#endif
         QFileDialog *fd = new QFileDialog(m_data_selector);
         fd->setFilter("Textual files (*.txt);;All files (*)");
         fd->setDirectory(Settings::Get()->value("regtab/loaddatadir", QDir::currentPath()).toString());
@@ -155,8 +171,20 @@ void RegTab::OnDataSelChanged(int index)
         }
         Settings::Get()->setValue("regtab/loaddatadir", fd->directory().absolutePath());
     }
+#ifdef HAVE_HWSTUB
+    else if(var == DataSelDevice)
+    {
+        m_data_sel_edit->hide();
+        m_dev_selector->show();
+        OnDevListChanged();
+    }
+#endif
     else
     {
+        m_data_sel_edit->show();
+#ifdef HAVE_HWSTUB
+        m_dev_selector->hide();
+#endif
         delete m_io_backend;
         m_io_backend = m_backend->CreateDummyIoBackend();
         SetDataSocName("");
@@ -204,7 +232,7 @@ void RegTab::OnAnalyserClicked(QListWidgetItem *current)
     delete m_right_content;
     AnalyserFactory *ana = AnalyserFactory::GetAnalyserByName(current->text());
     m_right_content = ana->Create(m_cur_soc, m_io_backend)->GetWidget();
-    m_right_panel->addWidget(m_right_content);
+    m_right_panel->addWidget(m_right_content, 1);
 }
 
 void RegTab::DisplayRegister(soc_dev_t& dev, soc_dev_addr_t& dev_addr,
@@ -256,8 +284,8 @@ void RegTab::DisplayRegister(soc_dev_t& dev, soc_dev_addr_t& dev_addr,
     top_layout->addStretch();
 
     soc_word_t value;
-    bool has_value = m_io_backend->ReadRegister(QString().sprintf("HW.%s.%s",
-        dev_addr.name.c_str(), reg_addr.name.c_str()), value);
+    BackendHelper helper(m_io_backend, m_cur_soc);
+    bool has_value = helper.ReadRegister(dev_addr.name.c_str(), reg_addr.name.c_str(), value);
 
     QHBoxLayout *raw_val_layout = 0;
     if(has_value)
@@ -348,6 +376,37 @@ void RegTab::OnSocListChanged()
         m_soc_selector->addItem(socs[i]);
 }
 
+#ifdef HAVE_HWSTUB
+void RegTab::OnDevListChanged()
+{
+    m_dev_selector->clear();
+    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);
+    else
+        SetDataSocName("");
+}
+
+void RegTab::OnDevChanged(int index)
+{
+    if(index == -1)
+        return;
+    HWStubDevice *dev = reinterpret_cast< HWStubDevice* >(m_dev_selector->itemData(index).value< void* >());
+    delete m_io_backend;
+    m_io_backend = m_backend->CreateHWStubIoBackend(dev);
+    SetDataSocName(m_io_backend->GetSocName());
+    OnDataSocActivated(m_io_backend->GetSocName());
+    OnDataChanged();
+}
+#endif
+
 void RegTab::FillDevSubTree(RegTreeItem *item)
 {
     soc_dev_t& sd = m_cur_soc.dev[item->GetDevIndex()];