hw/isa/piix3: Create USB controller in host device

The USB controller is an integral part of PIIX3 (function 2). So create
it as part of the south bridge.

Note that the USB function is optional in QEMU. This is why it gets
object_initialize_child()'ed in realize rather than in instance_init.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20231007123843.127151-13-shentey@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index 3f1dabade0..aebc0da23b 100644
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -298,6 +298,16 @@ static void pci_piix3_realize(PCIDevice *dev, Error **errp)
     if (!qdev_realize(DEVICE(&d->ide), BUS(pci_bus), errp)) {
         return;
     }
+
+    /* USB */
+    if (d->has_usb) {
+        object_initialize_child(OBJECT(dev), "uhci", &d->uhci,
+                                TYPE_PIIX3_USB_UHCI);
+        qdev_prop_set_int32(DEVICE(&d->uhci), "addr", dev->devfn + 2);
+        if (!qdev_realize(DEVICE(&d->uhci), BUS(pci_bus), errp)) {
+            return;
+        }
+    }
 }
 
 static void build_pci_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
@@ -332,6 +342,11 @@ static void pci_piix3_init(Object *obj)
     object_initialize_child(obj, "ide", &d->ide, TYPE_PIIX3_IDE);
 }
 
+static Property pci_piix3_props[] = {
+    DEFINE_PROP_BOOL("has-usb", PIIX3State, has_usb, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void pci_piix3_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -352,6 +367,7 @@ static void pci_piix3_class_init(ObjectClass *klass, void *data)
      * pc_piix.c's pc_init1()
      */
     dc->user_creatable = false;
+    device_class_set_props(dc, pci_piix3_props);
     adevc->build_dev_aml = build_pci_isa_aml;
 }