1 files changed, 10 insertions, 0 deletions
diff --git a/hw/usb.h b/hw/usb.h
index 61271768bc..1beb4b32a9 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -229,6 +229,12 @@ typedef struct USBDeviceClass {
     int (*init)(USBDevice *dev);
 
     /*
+     * Walk (enabled) downstream ports, check for a matching device.
+     * Only hubs implement this.
+     */
+    USBDevice *(*find_device)(USBDevice *dev, uint8_t addr);
+
+    /*
      * Process USB packet.
      * Called by the HC (Host Controller).
      *
@@ -332,6 +338,8 @@ void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes);
 void usb_packet_skip(USBPacket *p, size_t bytes);
 void usb_packet_cleanup(USBPacket *p);
 
+USBDevice *usb_find_device(USBPort *port, uint8_t addr);
+
 int usb_handle_packet(USBDevice *dev, USBPacket *p);
 void usb_packet_complete(USBDevice *dev, USBPacket *p);
 void usb_cancel_packet(USBPacket * p);
@@ -446,6 +454,8 @@ extern const VMStateDescription vmstate_usb_device;
     .offset     = vmstate_offset_value(_state, _field, USBDevice),   \
 }
 
+USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr);
+
 int usb_device_handle_packet(USBDevice *dev, USBPacket *p);
 
 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p);