usb: Add a register_companion USB bus op.

This is a preparation patch for adding support for USB companion controllers.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/hw/usb-bus.c b/hw/usb-bus.c
index e37e8a28a6..b511bac411 100644
--- a/hw/usb-bus.c
+++ b/hw/usb-bus.c
@@ -160,6 +160,37 @@ void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
     bus->nfree++;
 }
 
+int usb_register_companion(const char *masterbus, USBPort *ports[],
+                           uint32_t portcount, uint32_t firstport,
+                           void *opaque, USBPortOps *ops, int speedmask)
+{
+    USBBus *bus;
+    int i;
+
+    QTAILQ_FOREACH(bus, &busses, next) {
+        if (strcmp(bus->qbus.name, masterbus) == 0) {
+            break;
+        }
+    }
+
+    if (!bus || !bus->ops->register_companion) {
+        qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
+                      "an USB masterbus");
+        if (bus) {
+            error_printf_unless_qmp(
+                "USB bus '%s' does not allow companion controllers\n",
+                masterbus);
+        }
+        return -1;
+    }
+
+    for (i = 0; i < portcount; i++) {
+        usb_fill_port(ports[i], opaque, i, ops, speedmask);
+    }
+
+    return bus->ops->register_companion(bus, ports, portcount, firstport);
+}
+
 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 {
     if (upstream) {
diff --git a/hw/usb.h b/hw/usb.h
index 076e2ffce4..a5f2efa613 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -344,6 +344,8 @@ struct USBBus {
 };
 
 struct USBBusOps {
+    int (*register_companion)(USBBus *bus, USBPort *ports[],
+                              uint32_t portcount, uint32_t firstport);
     void (*device_destroy)(USBBus *bus, USBDevice *dev);
 };
 
@@ -356,6 +358,9 @@ USBDevice *usb_create_simple(USBBus *bus, const char *name);
 USBDevice *usbdevice_create(const char *cmdline);
 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
                        USBPortOps *ops, int speedmask);
+int usb_register_companion(const char *masterbus, USBPort *ports[],
+                           uint32_t portcount, uint32_t firstport,
+                           void *opaque, USBPortOps *ops, int speedmask);
 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr);
 void usb_unregister_port(USBBus *bus, USBPort *port);
 int usb_device_attach(USBDevice *dev);