Its not necessary and also not specified in the datasheet 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>
Reviewed-by: Felipe Balbi <ba...@ti.com>
---
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 5f41ae2..21e1dd6 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -477,7 +477,6 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct
ci13xxx_req *mReq)
/* QH configuration */
mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */
mEp->qh.ptr->td.token &=
cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE));
- mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT);
wmb(); /* synchronize before ep prime */
@@ -1046,6 +1045,8 @@ static int ep_enable(struct usb_ep *ep,
mEp->qh.ptr->cap &= cpu_to_le32(~QH_MULT);
else
mEp->qh.ptr->cap &= cpu_to_le32(~QH_ZLT);
+ if (mEp->num)
+ mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT);
mEp->qh.ptr->cap |= cpu_to_le32((mEp->ep.maxpacket << __ffs(QH_MAX_PKT))
& QH_MAX_PKT);
--
1.8.2.rc2
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