Its not needed to change the ZLT flag before every ep_prime. This patch moves
this to the ep_enable and applies it only for non configuration endpoints.
Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>
---
drivers/usb/chipidea/udc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index b7f0a7b..a86d9a6 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -473,7 +473,6 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct
ci13xxx_req *mReq)
/* QH configuration */
writel(mReq->dma, &mEp->qh.ptr->td.next); /* TERMINATE = 0 */
writel(readl(&mEp->qh.ptr->td.token) &
~(TD_STATUS_HALTED|TD_STATUS_ACTIVE), &mEp->qh.ptr->td.token);
- writel(readl(&mEp->qh.ptr->cap) | QH_ZLT, &mEp->qh.ptr->cap);
wmb(); /* synchronize before ep prime */
@@ -1039,6 +1038,8 @@ static int ep_enable(struct usb_ep *ep,
mEp->qh.ptr->cap &= ~QH_MULT;
else
writel(readl(&mEp->qh.ptr->cap) & ~QH_ZLT, &mEp->qh.ptr->cap);
+ if (mEp->num)
+ writel(readl(&mEp->qh.ptr->cap) | QH_ZLT, &mEp->qh.ptr->cap);
writel(readl(&mEp->qh.ptr->cap) | ((mEp->ep.maxpacket <<
__ffs(QH_MAX_PKT)) & QH_MAX_PKT), &mEp->qh.ptr->cap);
writel(readl(&mEp->qh.ptr->td.next) | TD_TERMINATE,
&mEp->qh.ptr->td.next); /* needed? */
--
1.8.2.rc2
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