3 files changed, 18 insertions, 3 deletions

diff --git a/hw/usb/hcd-ehci-pci.c b/hw/usb/hcd-ehci-pci.c
index 289ca3b..490f2b6 100644
--- a/hw/usb/hcd-ehci-pci.c
+++ b/hw/usb/hcd-ehci-pci.c
@@ -23,6 +23,7 @@ typedef struct EHCIPCIInfo {
     uint16_t vendor_id;
     uint16_t device_id;
     uint8_t  revision;
+    bool companion;
 } EHCIPCIInfo;
 
 static int usb_ehci_pci_initfn(PCIDevice *dev)
@@ -71,6 +72,7 @@ static int usb_ehci_pci_initfn(PCIDevice *dev)
 
 static void usb_ehci_pci_init(Object *obj)
 {
+    DeviceClass *dc = OBJECT_GET_CLASS(DeviceClass, obj, TYPE_DEVICE);
     EHCIPCIState *i = PCI_EHCI(obj);
     EHCIState *s = &i->ehci;
 
@@ -81,6 +83,10 @@ static void usb_ehci_pci_init(Object *obj)
     s->portscbase = 0x44;
     s->portnr = NB_PORTS;
 
+    if (!dc->hotpluggable) {
+        s->companion_enable = true;
+    }
+
     usb_ehci_init(s, DEVICE(obj));
 }
 
@@ -137,7 +143,6 @@ static void ehci_class_init(ObjectClass *klass, void *data)
     k->exit = usb_ehci_pci_exit;
     k->class_id = PCI_CLASS_SERIAL_USB;
     k->config_write = usb_ehci_pci_write_config;
-    dc->hotpluggable = false;
     dc->vmsd = &vmstate_ehci_pci;
     dc->props = ehci_pci_properties;
 }
@@ -161,6 +166,9 @@ static void ehci_data_class_init(ObjectClass *klass, void *data)
     k->device_id = i->device_id;
     k->revision = i->revision;
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
+    if (i->companion) {
+        dc->hotpluggable = false;
+    }
 }
 
 static struct EHCIPCIInfo ehci_pci_info[] = {
@@ -174,11 +182,13 @@ static struct EHCIPCIInfo ehci_pci_info[] = {
         .vendor_id = PCI_VENDOR_ID_INTEL,
         .device_id = PCI_DEVICE_ID_INTEL_82801I_EHCI1,
         .revision  = 0x03,
+        .companion = true,
     },{
         .name      = "ich9-usb-ehci2", /* 00:1a.7 */
         .vendor_id = PCI_VENDOR_ID_INTEL,
         .device_id = PCI_DEVICE_ID_INTEL_82801I_EHCI2,
         .revision  = 0x03,
+        .companion = true,
     }
 };
 
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index bacb7ce..1cc0fc1 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2347,10 +2347,13 @@ static USBPortOps ehci_port_ops = {
     .complete = ehci_async_complete_packet,
 };
 
-static USBBusOps ehci_bus_ops = {
+static USBBusOps ehci_bus_ops_companion = {
     .register_companion = ehci_register_companion,
     .wakeup_endpoint = ehci_wakeup_endpoint,
 };
+static USBBusOps ehci_bus_ops_standalone = {
+    .wakeup_endpoint = ehci_wakeup_endpoint,
+};
 
 static void usb_ehci_pre_save(void *opaque)
 {
@@ -2456,7 +2459,8 @@ void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)
         return;
     }
 
-    usb_bus_new(&s->bus, sizeof(s->bus), &ehci_bus_ops, dev);
+    usb_bus_new(&s->bus, sizeof(s->bus), s->companion_enable ?
+                &ehci_bus_ops_companion : &ehci_bus_ops_standalone, dev);
     for (i = 0; i < s->portnr; i++) {
         usb_register_port(&s->bus, &s->ports[i], s, i, &ehci_port_ops,
                           USB_SPEED_MASK_HIGH);
diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h
index 4858b7e..2bc259c 100644
--- a/hw/usb/hcd-ehci.h
+++ b/hw/usb/hcd-ehci.h
@@ -262,6 +262,7 @@ struct EHCIState {
     MemoryRegion mem_opreg;
     MemoryRegion mem_ports;
     int companion_count;
+    bool companion_enable;
     uint16_t capsbase;
     uint16_t opregbase;
     uint16_t portscbase;