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USB: musb_gadget: implement set_wedge() method

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Implement the driver's set_wedge() method by adding the 'wedged' flag
to the 'struct musb_ep'.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sergei Shtylyov 2009-11-18 22:51:51 +03:00 committed by Greg Kroah-Hartman
parent 196f1b7a38
commit 47e9760529
3 changed files with 26 additions and 2 deletions
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20
drivers/usb/musb/musb_gadget.c
View file

@ -966,6 +966,7 @@ static int musb_gadget_enable(struct usb_ep *ep,
musb_ep->desc = desc;
musb_ep->busy = 0;
musb_ep->wedged = 0;
status = 0;
pr_debug("%s periph: enabled %s for %s %s, %smaxpacket %d\n",
@ -1262,7 +1263,8 @@ int musb_gadget_set_halt(struct usb_ep *ep, int value)
goto done;
}
}
}
} else
musb_ep->wedged = 0;
/* set/clear the stall and toggle bits */
DBG(2, "%s: %s stall\n", ep->name, value ? "set" : "clear");
@ -1301,6 +1303,21 @@ done:
return status;
}
/*
* Sets the halt feature with the clear requests ignored
*/
int musb_gadget_set_wedge(struct usb_ep *ep)
{
struct musb_ep *musb_ep = to_musb_ep(ep);
if (!ep)
return -EINVAL;
musb_ep->wedged = 1;
return usb_ep_set_halt(ep);
}
static int musb_gadget_fifo_status(struct usb_ep *ep)
{
struct musb_ep *musb_ep = to_musb_ep(ep);
@ -1371,6 +1388,7 @@ static const struct usb_ep_ops musb_ep_ops = {
.queue = musb_gadget_queue,
.dequeue = musb_gadget_dequeue,
.set_halt = musb_gadget_set_halt,
.set_wedge = musb_gadget_set_wedge,
.fifo_status = musb_gadget_fifo_status,
.fifo_flush = musb_gadget_fifo_flush
};

2
drivers/usb/musb/musb_gadget.h
View file

@ -75,6 +75,8 @@ struct musb_ep {
/* later things are modified based on usage */
struct list_head req_list;
u8 wedged;
/* true if lock must be dropped but req_list may not be advanced */
u8 busy;
};

6
drivers/usb/musb/musb_gadget_ep0.c
View file

@ -273,6 +273,11 @@ __acquires(musb->lock)
if (!musb_ep->desc)
break;
handled = 1;
/* Ignore request if endpoint is wedged */
if (musb_ep->wedged)
break;
/* REVISIT do it directly, no locking games */
spin_unlock(&musb->lock);
musb_gadget_set_halt(&musb_ep->end_point, 0);
@ -280,7 +285,6 @@ __acquires(musb->lock)
/* select ep0 again */
musb_ep_select(mbase, 0);
handled = 1;
} break;
default:
/* class, vendor, etc ... delegate */