USB: gadget: dummy_hcd: implement set_wedge
This patch (as1131) implements the set_wedge() method for dummy_hcd.
This method is necessary for strict USBCV compliance in
g_file_storage.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 7600a0c..9064696 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -82,6 +82,7 @@
const struct usb_endpoint_descriptor *desc;
struct usb_ep ep;
unsigned halted : 1;
+ unsigned wedged : 1;
unsigned already_seen : 1;
unsigned setup_stage : 1;
};
@@ -436,6 +437,7 @@
/* at this point real hardware should be NAKing transfers
* to that endpoint, until a buffer is queued to it.
*/
+ ep->halted = ep->wedged = 0;
retval = 0;
done:
return retval;
@@ -597,7 +599,7 @@
}
static int
-dummy_set_halt (struct usb_ep *_ep, int value)
+dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
{
struct dummy_ep *ep;
struct dummy *dum;
@@ -609,16 +611,32 @@
if (!dum->driver)
return -ESHUTDOWN;
if (!value)
- ep->halted = 0;
+ ep->halted = ep->wedged = 0;
else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
!list_empty (&ep->queue))
return -EAGAIN;
- else
+ else {
ep->halted = 1;
+ if (wedged)
+ ep->wedged = 1;
+ }
/* FIXME clear emulated data toggle too */
return 0;
}
+static int
+dummy_set_halt(struct usb_ep *_ep, int value)
+{
+ return dummy_set_halt_and_wedge(_ep, value, 0);
+}
+
+static int dummy_set_wedge(struct usb_ep *_ep)
+{
+ if (!_ep || _ep->name == ep0name)
+ return -EINVAL;
+ return dummy_set_halt_and_wedge(_ep, 1, 1);
+}
+
static const struct usb_ep_ops dummy_ep_ops = {
.enable = dummy_enable,
.disable = dummy_disable,
@@ -630,6 +648,7 @@
.dequeue = dummy_dequeue,
.set_halt = dummy_set_halt,
+ .set_wedge = dummy_set_wedge,
};
/*-------------------------------------------------------------------------*/
@@ -760,7 +779,8 @@
ep->ep.name = ep_name [i];
ep->ep.ops = &dummy_ep_ops;
list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
- ep->halted = ep->already_seen = ep->setup_stage = 0;
+ ep->halted = ep->wedged = ep->already_seen =
+ ep->setup_stage = 0;
ep->ep.maxpacket = ~0;
ep->last_io = jiffies;
ep->gadget = &dum->gadget;
@@ -1351,7 +1371,7 @@
} else if (setup.bRequestType == Ep_Request) {
// endpoint halt
ep2 = find_endpoint (dum, w_index);
- if (!ep2) {
+ if (!ep2 || ep2->ep.name == ep0name) {
value = -EOPNOTSUPP;
break;
}
@@ -1380,7 +1400,8 @@
value = -EOPNOTSUPP;
break;
}
- ep2->halted = 0;
+ if (!ep2->wedged)
+ ep2->halted = 0;
value = 0;
status = 0;
}