usb gadget: descriptor copying support

[linux-2.6-omap-h63xx.git] / include / linux / usb / gadget.h

diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index d8128f7102c92858bc01d71c7544882849318ae7..0ebedaec075de8289dd6c3fb0f771c06cf5fe3bd 100644 (file)
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -114,6 +114,8 @@ struct usb_ep_ops {
        int (*dequeue) (struct usb_ep *ep, struct usb_request *req);
 
        int (*set_halt) (struct usb_ep *ep, int value);
+       int (*set_wedge) (struct usb_ep *ep);
+
        int (*fifo_status) (struct usb_ep *ep);
        void (*fifo_flush) (struct usb_ep *ep);
 };
@@ -348,6 +350,25 @@ static inline int usb_ep_clear_halt(struct usb_ep *ep)
        return ep->ops->set_halt(ep, 0);
 }
 
+/**
+ * usb_ep_set_wedge - sets the halt feature and ignores clear requests
+ * @ep: the endpoint being wedged
+ *
+ * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
+ * requests. If the gadget driver clears the halt status, it will
+ * automatically unwedge the endpoint.
+ *
+ * Returns zero on success, else negative errno.
+ */
+static inline int
+usb_ep_set_wedge(struct usb_ep *ep)
+{
+       if (ep->ops->set_wedge)
+               return ep->ops->set_wedge(ep);
+       else
+               return ep->ops->set_halt(ep, 1);
+}
+
 /**
  * usb_ep_fifo_status - returns number of bytes in fifo, or error
  * @ep: the endpoint whose fifo status is being checked.
@@ -837,6 +858,25 @@ int usb_descriptor_fillbuf(void *, unsigned,
 int usb_gadget_config_buf(const struct usb_config_descriptor *config,
        void *buf, unsigned buflen, const struct usb_descriptor_header **desc);
 
+/* copy a NULL-terminated vector of descriptors */
+struct usb_descriptor_header **usb_copy_descriptors(
+               struct usb_descriptor_header **);
+
+/* return copy of endpoint descriptor given original descriptor set */
+struct usb_endpoint_descriptor *usb_find_endpoint(
+       struct usb_descriptor_header **src,
+       struct usb_descriptor_header **copy,
+       struct usb_endpoint_descriptor *match);
+
+/**
+ * usb_free_descriptors - free descriptors returned by usb_copy_descriptors()
+ * @v: vector of descriptors
+ */
+static inline void usb_free_descriptors(struct usb_descriptor_header **v)
+{
+       kfree(v);
+}
+
 /*-------------------------------------------------------------------------*/
 
 /* utility wrapping a simple endpoint selection policy */