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 292a0425d85c157d276ff9101baf94bd404f896a..9dd879194752a829f93cb5b1cfadf4e9df55a2ab 100644 (file)
--- a/include/usb.h
+++ b/include/usb.h
@@ -169,6 +169,17 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 #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