From a5e54b0dbb6a099793caf508b1d6c7d82f965ec3 Mon Sep 17 00:00:00 2001
From: David Lopo <lopo.david@gmail.com>
Date: Tue, 29 Apr 2008 10:12:37 +0100
Subject: [PATCH] USB GADGET/PERIPHERAL: g_file_storage Bulk-Only Transport
compliance
Gadget can tell controller driver to ignore Clear-Feature(HALT_ENDPOINT)
This API change enables future support for Bulk-Only Transport compliance
Signed-off-by: David Lopo <lopo.david@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
include/linux/usb/gadget.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index d8128f7102c9..cf468fbdbf8e 100644
--- 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.
--
2.30.2