usb.h: Add udc_disconnect prototype to usb.h
PXA25x gadget implements common function usb_disconnect().
This patch adds this function prototype into usb.h for boards using it.
Signed-off-by: Lukasz Dalek <luk0104@gmail.com>
diff --git a/include/usb.h b/include/usb.h
index 292a042..9dd8791 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -169,6 +169,17 @@
#define USB_UHCI_VEND_ID 0x8086
#define USB_UHCI_DEV_ID 0x7112
+/*
+ * PXA25x can only act as USB device. There are drivers
+ * which works with USB CDC gadgets implementations.
+ * Some of them have common routines which can be used
+ * in boards init functions e.g. udc_disconnect() used for
+ * forced device disconnection from host.
+ */
+#elif defined(CONFIG_USB_GADGET_PXA2XX)
+
+extern void udc_disconnect(void);
+
#else
#error USB Lowlevel not defined
#endif