[Qemu-devel] [PATCH 3/5] usb: tag standalone ehci as hotpluggable

[Gerd Hoffmann <kraxel@redhat.com>]

Add a flag to EHCIPCIInfo saying whenever the controller supports
companions or not.  Make sure we only allow registering companions for
ehci versions supporting that.  Enable pci hotplug for the ehci
variants not supporting companions.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb/hcd-ehci-pci.c | 12 +++++++++++-
 hw/usb/hcd-ehci.c     |  8 ++++++--
 hw/usb/hcd-ehci.h     |  1 +
 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;
-- 
1.8.3.1