From 3a8a3b1cee6c525661732b8bcf29ac63d42945ed Mon Sep 17 00:00:00 2001
From: Bryan Wu <cooloney@kernel.org>
Date: Mon, 21 Dec 2009 10:43:06 -0500
Subject: [PATCH] USB: gadget: use ep5 for bulk-in and ep6 for bulk-out for
Blackfin MUSB
Normally, the musb uses ep1 as the bidirectional bulk endpoint. This won't
work on the Blackfin musb as all endpoints (except ep0) are unidirectional.
Further, ep1-ep4 have a small 128 byte FIFO which makes them undesirable
for bulk endpoints (which need more like a 512 byte FIFO). This leaves us
with ep5-ep7 which have 1024 byte FIFOs and can be configured as either
in/out and bulk/interrupt/iso on the fly.
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/epautoconf.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index cd0914ec898eff..4671d5d7973d78 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -275,6 +275,20 @@ struct usb_ep * __init usb_ep_autoconfig (
ep = find_ep (gadget, "ep1-bulk");
if (ep && ep_matches (gadget, ep, desc))
return ep;
+
+#ifdef CONFIG_BLACKFIN
+ } else if (gadget_is_musbhsfc(gadget) || gadget_is_musbhdrc(gadget)) {
+ if ((USB_ENDPOINT_XFER_BULK == type) ||
+ (USB_ENDPOINT_XFER_ISOC == type)) {
+ if (USB_DIR_IN & desc->bEndpointAddress)
+ ep = find_ep (gadget, "ep5in");
+ else
+ ep = find_ep (gadget, "ep6out");
+ } else
+ ep = NULL;
+ if (ep && ep_matches (gadget, ep, desc))
+ return ep;
+#endif
}
/* Second, look at endpoints until an unclaimed one looks usable */
--
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