[PATCH 1/5] USB: gadget: Fix unused variable warning in ci13xxx_udc

[PATCH 1/5] USB: gadget: Fix unused variable warning in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index e09178b..6a9ad59 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,7 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
-	int retval;
+	int uninitialized_var(retval);
 
 	trace("%p", mEp);
 
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 2/5] USB: gadget: Fix bug in endpoint feature request processing in ci13xxx_udc

[Pavankumar Kondeti]

The OUT endpoints are stored in 0 - hw_ep_max/2 and IN endpoints are
stored from hw_ep_max/2 - hw_ep_max in ci13xxx_ep array.  Retrieve
the IN endpoint correctly while processing endpoint feature requests.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 6a9ad59..0e6d649 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1894,7 +1894,7 @@ __acquires(udc->lock)
 
 	for (i = 0; i < hw_ep_max; i++) {
 		struct ci13xxx_ep *mEp  = &udc->ci13xxx_ep[i];
-		int type, num, err = -EINVAL;
+		int type, num, dir, err = -EINVAL;
 		struct usb_ctrlrequest req;
 
 		if (mEp->desc == NULL)
@@ -1952,7 +1952,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 				if (!udc->ci13xxx_ep[num].wedge) {
 					spin_unlock(udc->lock);
 					err = usb_ep_clear_halt(
@@ -2001,7 +2004,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 
 				spin_unlock(udc->lock);
 				err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 3/5] USB: gadget: Use ep0out for control OUT data phase in ci13xxx_udc

[Pavankumar Kondeti]

The current code queue the control OUT data request to ep0in instead of
ep0out.  Check ep0_dir and use the correct control endpoint.

Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 0e6d649..0076db2 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,6 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
+	struct ci13xxx_ep *mEpTemp = mEp;
 	int uninitialized_var(retval);
 
 	trace("%p", mEp);
@@ -1859,7 +1860,10 @@ __acquires(mEp->lock)
 		dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
 		if (mReq->req.complete != NULL) {
 			spin_unlock(mEp->lock);
-			mReq->req.complete(&mEp->ep, &mReq->req);
+			if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
+					mReq->req.length)
+				mEpTemp = &_udc->ep0in;
+			mReq->req.complete(&mEpTemp->ep, &mReq->req);
 			spin_lock(mEp->lock);
 		}
 	}
@@ -2248,11 +2252,15 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
 
 	spin_lock_irqsave(mEp->lock, flags);
 
-	if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
-	    !list_empty(&mEp->qh.queue)) {
-		_ep_nuke(mEp);
-		retval = -EOVERFLOW;
-		warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+	if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+		if (req->length)
+			mEp = (_udc->ep0_dir == RX) ?
+				&_udc->ep0out : &_udc->ep0in;
+		if (!list_empty(&mEp->qh.queue)) {
+			_ep_nuke(mEp);
+			retval = -EOVERFLOW;
+			warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+		}
 	}
 
 	/* first nuke then test link, e.g. previous status has not sent */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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[PATCH 4/5] USB: gadget: Initialize ep0 once while registering gadget in ci13xxx_udc

[Pavankumar Kondeti]

From: Anji jonnala <anjir@codeaurora.org>

Some of the simulators may cache the ep0 maxpacket size to zero
if the ep0 dQh is not setup before enabling the pullup. Hence
Setup ep0 and initialize the dQh fields once while registering the
gadget(before enabling the pullup).

HSUSB Chipidea link controller spec says ep0 is enabled always
in the HW. Hence disabling and enabling the ep0 as a part of
reset interrupt is unneccesary.
Remove the disable/enable ep0 logic from reset interrupt handling.

Signed-off-by: Anji jonnala <anjir@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   31 +++++++++++++++++--------------
 1 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 0076db2..5fdc12d 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1634,8 +1634,6 @@ static int _gadget_stop_activity(struct usb_gadget *gadget)
 	gadget_for_each_ep(ep, gadget) {
 		usb_ep_disable(ep);
 	}
-	usb_ep_disable(&udc->ep0out.ep);
-	usb_ep_disable(&udc->ep0in.ep);
 
 	if (udc->status != NULL) {
 		usb_ep_free_request(&udc->ep0in.ep, udc->status);
@@ -1678,18 +1676,10 @@ __acquires(udc->lock)
 	if (retval)
 		goto done;
 
-	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
-	if (retval)
-		goto done;
+	udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
+	if (udc->status == NULL)
+		retval = -ENOMEM;
 
-	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
-	if (!retval) {
-		udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
-		if (udc->status == NULL) {
-			usb_ep_disable(&udc->ep0out.ep);
-			retval = -ENOMEM;
-		}
-	}
 	spin_lock(udc->lock);
 
  done:
@@ -2120,7 +2110,12 @@ static int ep_enable(struct usb_ep *ep,
 		(mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
 	mEp->qh.ptr->td.next |= TD_TERMINATE;   /* needed? */
 
-	retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
+	/*
+	 * Enable endpoints in the HW other than ep0 as ep0
+	 * is always enabled
+	 */
+	if (mEp->num)
+		retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
 
 	spin_unlock_irqrestore(mEp->lock, flags);
 	return retval;
@@ -2609,6 +2604,14 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
 	}
 	if (retval)
 		goto done;
+	spin_unlock_irqrestore(udc->lock, flags);
+	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
+	if (retval)
+		return retval;
+	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
+	if (retval)
+		return retval;
+	spin_lock_irqsave(udc->lock, flags);
 
 	udc->gadget.ep0 = &udc->ep0in.ep;
 	/* bind gadget */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 5/5] USB: OTG: msm: Clear in_lpm flag before enabling the IRQ in resume

[Pavankumar Kondeti]

The current code is clearing in_lpm flag after enabling the IRQ.
If IRQ comes immediately before in_lpm flag is set, it thinks that
hardware is in low power mode and disables the IRQ.  Fix this by
clearing in_lpm flag before enabling the IRQ.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/otg/msm_otg.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c
index 2965986..f58b7da 100644
--- a/drivers/usb/otg/msm_otg.c
+++ b/drivers/usb/otg/msm_otg.c
@@ -389,14 +389,14 @@ skip_phy_resume:
 	if (bus)
 		set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
 
+	atomic_set(&motg->in_lpm, 0);
+
 	if (motg->async_int) {
 		motg->async_int = 0;
 		pm_runtime_put(otg->dev);
 		enable_irq(motg->irq);
 	}
 
-	atomic_set(&motg->in_lpm, 0);
-
 	dev_info(otg->dev, "USB exited from low power mode\n");
 
 	return 0;
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

Re: [PATCH 1/5] USB: gadget: Fix unused variable warning in ci13xxx_udc

[Michal Nazarewicz]

On Thu, 28 Apr 2011 09:58:17 +0200, Pavankumar Kondeti  
<pkondeti@codeaurora.org> wrote:

> Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
> ---
>  drivers/usb/gadget/ci13xxx_udc.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/gadget/ci13xxx_udc.c  
> b/drivers/usb/gadget/ci13xxx_udc.c
> index e09178b..6a9ad59 100644
> --- a/drivers/usb/gadget/ci13xxx_udc.c
> +++ b/drivers/usb/gadget/ci13xxx_udc.c
> @@ -1843,7 +1843,7 @@ __releases(mEp->lock)
>  __acquires(mEp->lock)
>  {
>  	struct ci13xxx_req *mReq, *mReqTemp;
> -	int retval;
> +	int uninitialized_var(retval);
> 	trace("%p", mEp);

Could we instead set it to 0?

Also, it seems this function has a bug where it compares retval
with EBUSY instead of -EBUSY:

	if (retval == EBUSY)
		retval = 0;

Just saying in case anyone wants to take care of it.

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michal "mina86" Nazarewicz    (o o)
ooo +-----<email/xmpp: mnazarewicz@google.com>-----ooO--(_)--Ooo--

Re: [PATCH 1/5] USB: gadget: Fix unused variable warning in ci13xxx_udc

[Pavan Kondeti]

On 4/28/2011 3:31 PM, Michal Nazarewicz wrote:
> On Thu, 28 Apr 2011 09:58:17 +0200, Pavankumar Kondeti  
> <pkondeti@codeaurora.org> wrote:
> 
>> Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
>> ---
>>  drivers/usb/gadget/ci13xxx_udc.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/usb/gadget/ci13xxx_udc.c  
>> b/drivers/usb/gadget/ci13xxx_udc.c
>> index e09178b..6a9ad59 100644
>> --- a/drivers/usb/gadget/ci13xxx_udc.c
>> +++ b/drivers/usb/gadget/ci13xxx_udc.c
>> @@ -1843,7 +1843,7 @@ __releases(mEp->lock)
>>  __acquires(mEp->lock)
>>  {
>>  	struct ci13xxx_req *mReq, *mReqTemp;
>> -	int retval;
>> +	int uninitialized_var(retval);
>> 	trace("%p", mEp);
> 
> Could we instead set it to 0?
>

would it matter anyway? we return -EINVAL if the queue is empty.
Otherwise we assign retval = _hardware_dequeue().

> Also, it seems this function has a bug where it compares retval
> with EBUSY instead of -EBUSY:
> 
> 	if (retval == EBUSY)
> 		retval = 0;
> 
> Just saying in case anyone wants to take care of it.
> 

Thanks for pointing this out. I will send out a patch to fix this.

As of now isr_tr_complete_low() return value is simply ignored for
non-control endpoints. We never hit this case for control endpoint.

-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

Re: [PATCH 1/5] USB: gadget: Fix unused variable warning in ci13xxx_udc

[David Brown]

On Thu, Apr 28 2011, Pavan Kondeti wrote:

> On 4/28/2011 3:31 PM, Michal Nazarewicz wrote:
>> On Thu, 28 Apr 2011 09:58:17 +0200, Pavankumar Kondeti  
>> <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> wrote:
>> 
>>> Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
>>> ---
>>>  drivers/usb/gadget/ci13xxx_udc.c |    2 +-
>>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/drivers/usb/gadget/ci13xxx_udc.c  
>>> b/drivers/usb/gadget/ci13xxx_udc.c
>>> index e09178b..6a9ad59 100644
>>> --- a/drivers/usb/gadget/ci13xxx_udc.c
>>> +++ b/drivers/usb/gadget/ci13xxx_udc.c
>>> @@ -1843,7 +1843,7 @@ __releases(mEp->lock)
>>>  __acquires(mEp->lock)
>>>  {
>>>  	struct ci13xxx_req *mReq, *mReqTemp;
>>> -	int retval;
>>> +	int uninitialized_var(retval);
>>> 	trace("%p", mEp);
>> 
>> Could we instead set it to 0?
>>
>
> would it matter anyway? we return -EINVAL if the queue is empty.
> Otherwise we assign retval = _hardware_dequeue().

It is indeed a legitimate mistake on gcc's part.  Using
uninitialized_var() avoids generating unnecessary code to initialize the
value.  On the other hand, initializing to zero would keep future
possible changes from missing the warning.

Anyone know of a concensus on this kind of case?

David

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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[PATCH 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index e09178b..348d8a0 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1864,7 +1864,7 @@ __acquires(mEp->lock)
 		}
 	}
 
-	if (retval == EBUSY)
+	if (retval == -EBUSY)
 		retval = 0;
 	if (retval < 0)
 		dbg_event(_usb_addr(mEp), "DONE", retval);
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 2/7] USB: gadget: Use bitwise AND operator to test flags in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 348d8a0..03dff95 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -310,7 +310,7 @@ static int hw_device_reset(struct ci13xxx *udc)
 		udc->udc_driver->notify_event(udc,
 			CI13XXX_CONTROLLER_RESET_EVENT);
 
-	if (udc->udc_driver->flags && CI13XXX_DISABLE_STREAMING)
+	if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
 		hw_cwrite(CAP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
 
 	/* USBMODE should be configured step by step */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 3/7] USB: gadget: Fix unused variable warning in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 03dff95..92498ae 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,7 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
-	int retval;
+	int uninitialized_var(retval);
 
 	trace("%p", mEp);
 
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 4/7] USB: gadget: Fix bug in endpoint feature request processing in ci13xxx_udc

[Pavankumar Kondeti]

The OUT endpoints are stored in 0 - hw_ep_max/2 and IN endpoints are
stored from hw_ep_max/2 - hw_ep_max in ci13xxx_ep array.  Retrieve
the IN endpoint correctly while processing endpoint feature requests.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 92498ae..1b095cb 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1894,7 +1894,7 @@ __acquires(udc->lock)
 
 	for (i = 0; i < hw_ep_max; i++) {
 		struct ci13xxx_ep *mEp  = &udc->ci13xxx_ep[i];
-		int type, num, err = -EINVAL;
+		int type, num, dir, err = -EINVAL;
 		struct usb_ctrlrequest req;
 
 		if (mEp->desc == NULL)
@@ -1952,7 +1952,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 				if (!udc->ci13xxx_ep[num].wedge) {
 					spin_unlock(udc->lock);
 					err = usb_ep_clear_halt(
@@ -2001,7 +2004,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 
 				spin_unlock(udc->lock);
 				err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 5/7] USB: gadget: Use ep0out for control OUT data phase in ci13xxx_udc

[Pavankumar Kondeti]

The current code queue the control OUT data request to ep0in instead of
ep0out.  Check ep0_dir and use the correct control endpoint.

Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 1b095cb..09c76a1 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,6 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
+	struct ci13xxx_ep *mEpTemp = mEp;
 	int uninitialized_var(retval);
 
 	trace("%p", mEp);
@@ -1859,7 +1860,10 @@ __acquires(mEp->lock)
 		dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
 		if (mReq->req.complete != NULL) {
 			spin_unlock(mEp->lock);
-			mReq->req.complete(&mEp->ep, &mReq->req);
+			if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
+					mReq->req.length)
+				mEpTemp = &_udc->ep0in;
+			mReq->req.complete(&mEpTemp->ep, &mReq->req);
 			spin_lock(mEp->lock);
 		}
 	}
@@ -2248,11 +2252,15 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
 
 	spin_lock_irqsave(mEp->lock, flags);
 
-	if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
-	    !list_empty(&mEp->qh.queue)) {
-		_ep_nuke(mEp);
-		retval = -EOVERFLOW;
-		warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+	if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+		if (req->length)
+			mEp = (_udc->ep0_dir == RX) ?
+				&_udc->ep0out : &_udc->ep0in;
+		if (!list_empty(&mEp->qh.queue)) {
+			_ep_nuke(mEp);
+			retval = -EOVERFLOW;
+			warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+		}
 	}
 
 	/* first nuke then test link, e.g. previous status has not sent */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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Re: [PATCH 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[David Brown]

On Thu, Apr 28 2011, Pavankumar Kondeti wrote:

> Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>

It is helpful to maintains to describe second revisions of patches in
the subject, something like:  [PATCH v2 1/7] ...

Also, for something this size, it would be helpful to have a coverletter
explaining the what the series does.  It is also useful to put a small
history in the coverletter stating what is fixed in each update of the
patch series.  For example, this update fixes some small mistakes that
were addressed on the list.

Oh, and you should CC the people that mentioned things that need to be
fixed so that they see the updates.

David

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Re: [PATCH 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[Greg KH]

On Fri, Apr 29, 2011 at 09:04:03AM -0700, David Brown wrote:
> On Thu, Apr 28 2011, Pavankumar Kondeti wrote:
> 
> > Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
> 
> It is helpful to maintains to describe second revisions of patches in
> the subject, something like:  [PATCH v2 1/7] ...

Yes, I'm totally confused now as to what patches you want applied...

So I'm just deleting all patches from you all from my patch queue.
Pavankumar, please fix this up and resend.

thanks,

greg k-h
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Re: [PATCH 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[Pavan Kondeti]

On 4/30/2011 5:59 AM, Greg KH wrote:
> On Fri, Apr 29, 2011 at 09:04:03AM -0700, David Brown wrote:
>> On Thu, Apr 28 2011, Pavankumar Kondeti wrote:
>>
>>> Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
>>
>> It is helpful to maintains to describe second revisions of patches in
>> the subject, something like:  [PATCH v2 1/7] ...
> 
> Yes, I'm totally confused now as to what patches you want applied...
> 
> So I'm just deleting all patches from you all from my patch queue.
> Pavankumar, please fix this up and resend.
> 

Sorry for the confusion. I will re-send the patch series.

Thanks,
Pavan

-- 
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The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

Re: [PATCH 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[Pavan Kondeti]

Hi David,

Thanks for your feedback. I will re-send the patch series.

Thanks,
Pavan

On 4/29/2011 9:34 PM, David Brown wrote:
> On Thu, Apr 28 2011, Pavankumar Kondeti wrote:
> 
>> Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
> 
> It is helpful to maintains to describe second revisions of patches in
> the subject, something like:  [PATCH v2 1/7] ...
> 
> Also, for something this size, it would be helpful to have a coverletter
> explaining the what the series does.  It is also useful to put a small
> history in the coverletter stating what is fixed in each update of the
> patch series.  For example, this update fixes some small mistakes that
> were addressed on the list.
> 
> Oh, and you should CC the people that mentioned things that need to be
> fixed so that they see the updates.
> 
> David
> 


-- 
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The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 6/7] USB: gadget: Initialize ep0 once while registering gadget in ci13xxx_udc

[Pavankumar Kondeti]

From: Anji jonnala <anjir@codeaurora.org>

Some of the simulators may cache the ep0 maxpacket size to zero
if the ep0 dQh is not setup before enabling the pullup. Hence
Setup ep0 and initialize the dQh fields once while registering the
gadget(before enabling the pullup).

HSUSB Chipidea link controller spec says ep0 is enabled always
in the HW. Hence disabling and enabling the ep0 as a part of
reset interrupt is unneccesary.
Remove the disable/enable ep0 logic from reset interrupt handling.

Signed-off-by: Anji jonnala <anjir@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   31 +++++++++++++++++--------------
 1 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 09c76a1..68123ee 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1634,8 +1634,6 @@ static int _gadget_stop_activity(struct usb_gadget *gadget)
 	gadget_for_each_ep(ep, gadget) {
 		usb_ep_disable(ep);
 	}
-	usb_ep_disable(&udc->ep0out.ep);
-	usb_ep_disable(&udc->ep0in.ep);
 
 	if (udc->status != NULL) {
 		usb_ep_free_request(&udc->ep0in.ep, udc->status);
@@ -1678,18 +1676,10 @@ __acquires(udc->lock)
 	if (retval)
 		goto done;
 
-	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
-	if (retval)
-		goto done;
+	udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
+	if (udc->status == NULL)
+		retval = -ENOMEM;
 
-	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
-	if (!retval) {
-		udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
-		if (udc->status == NULL) {
-			usb_ep_disable(&udc->ep0out.ep);
-			retval = -ENOMEM;
-		}
-	}
 	spin_lock(udc->lock);
 
  done:
@@ -2120,7 +2110,12 @@ static int ep_enable(struct usb_ep *ep,
 		(mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
 	mEp->qh.ptr->td.next |= TD_TERMINATE;   /* needed? */
 
-	retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
+	/*
+	 * Enable endpoints in the HW other than ep0 as ep0
+	 * is always enabled
+	 */
+	if (mEp->num)
+		retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
 
 	spin_unlock_irqrestore(mEp->lock, flags);
 	return retval;
@@ -2609,6 +2604,14 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
 	}
 	if (retval)
 		goto done;
+	spin_unlock_irqrestore(udc->lock, flags);
+	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
+	if (retval)
+		return retval;
+	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
+	if (retval)
+		return retval;
+	spin_lock_irqsave(udc->lock, flags);
 
 	udc->gadget.ep0 = &udc->ep0in.ep;
 	/* bind gadget */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 7/7] USB: OTG: msm: Clear in_lpm flag before enabling the IRQ in resume

[Pavankumar Kondeti]

The current code is clearing in_lpm flag after enabling the IRQ.
If IRQ comes immediately before in_lpm flag is set, it thinks that
hardware is in low power mode and disables the IRQ.  Fix this by
clearing in_lpm flag before enabling the IRQ.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/otg/msm_otg.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c
index 2965986..f58b7da 100644
--- a/drivers/usb/otg/msm_otg.c
+++ b/drivers/usb/otg/msm_otg.c
@@ -389,14 +389,14 @@ skip_phy_resume:
 	if (bus)
 		set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
 
+	atomic_set(&motg->in_lpm, 0);
+
 	if (motg->async_int) {
 		motg->async_int = 0;
 		pm_runtime_put(otg->dev);
 		enable_irq(motg->irq);
 	}
 
-	atomic_set(&motg->in_lpm, 0);
-
 	dev_info(otg->dev, "USB exited from low power mode\n");
 
 	return 0;
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 0/7] Typo & BUG fixes for MSM USB drivers

[Pavankumar Kondeti]

This patch series addresses the following issues.

1. EP0 is enabled after enabling pull-up in ci13xxx_udc.  But some simulators
are caching the ep0 max packet size at the time of pull-up enable due to
which USB is not working. Fix this by initializing ep0 at gadget driver
registration.
2. Retrieve the IN endpoint correctly from ep array while processing
endpoint feature requests.
3. Data phase on control OUT is not working.
4. USB does not work some times after resume due to a race condition involved
in clearing in_lpm flag.

Other than above issues, a couple typo mistakes are corrected in this patch
series.

Changelog:

- v2
  - Resending patches with V2 tag :-)
  - logical AND operator is used instead of bitwiese AND for testing flags.
  - Fixes a typo error (s/EBUSY/-EBUSY) pointed out by Michal.


Anji jonnala (1):
  USB: gadget: Initialize ep0 once while registering gadget in
    ci13xxx_udc

Pavankumar Kondeti (6):
  USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc
  USB: gadget: Use bitwise AND operator to test flags in ci13xxx_udc
  USB: gadget: Fix unused variable warning in ci13xxx_udc
  USB: gadget: Fix bug in endpoint feature request processing in
    ci13xxx_udc
  USB: gadget: Use ep0out for control OUT data phase in ci13xxx_udc
  USB: OTG: msm: Clear in_lpm flag before enabling the IRQ in resume

 drivers/usb/gadget/ci13xxx_udc.c |   65 ++++++++++++++++++++++++--------------
 drivers/usb/otg/msm_otg.c        |    4 +-
 2 files changed, 43 insertions(+), 26 deletions(-)

-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 1/7] USB: gadget: Fix typo (s/EBUSY/-EBUSY) in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index e09178b..348d8a0 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1864,7 +1864,7 @@ __acquires(mEp->lock)
 		}
 	}
 
-	if (retval == EBUSY)
+	if (retval == -EBUSY)
 		retval = 0;
 	if (retval < 0)
 		dbg_event(_usb_addr(mEp), "DONE", retval);
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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[PATCH V2 3/7] USB: gadget: Fix unused variable warning in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 03dff95..92498ae 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,7 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
-	int retval;
+	int uninitialized_var(retval);
 
 	trace("%p", mEp);
 
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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[PATCH V2 2/7] USB: gadget: Use bitwise AND operator to test flags in ci13xxx_udc

[Pavankumar Kondeti]

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 348d8a0..03dff95 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -310,7 +310,7 @@ static int hw_device_reset(struct ci13xxx *udc)
 		udc->udc_driver->notify_event(udc,
 			CI13XXX_CONTROLLER_RESET_EVENT);
 
-	if (udc->udc_driver->flags && CI13XXX_DISABLE_STREAMING)
+	if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
 		hw_cwrite(CAP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
 
 	/* USBMODE should be configured step by step */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 4/7] USB: gadget: Fix bug in endpoint feature request processing in ci13xxx_udc

[Pavankumar Kondeti]

The OUT endpoints are stored in 0 - hw_ep_max/2 and IN endpoints are
stored from hw_ep_max/2 - hw_ep_max in ci13xxx_ep array.  Retrieve
the IN endpoint correctly while processing endpoint feature requests.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 92498ae..1b095cb 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1894,7 +1894,7 @@ __acquires(udc->lock)
 
 	for (i = 0; i < hw_ep_max; i++) {
 		struct ci13xxx_ep *mEp  = &udc->ci13xxx_ep[i];
-		int type, num, err = -EINVAL;
+		int type, num, dir, err = -EINVAL;
 		struct usb_ctrlrequest req;
 
 		if (mEp->desc == NULL)
@@ -1952,7 +1952,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 				if (!udc->ci13xxx_ep[num].wedge) {
 					spin_unlock(udc->lock);
 					err = usb_ep_clear_halt(
@@ -2001,7 +2004,10 @@ __acquires(udc->lock)
 				if (req.wLength != 0)
 					break;
 				num  = le16_to_cpu(req.wIndex);
+				dir = num & USB_ENDPOINT_DIR_MASK;
 				num &= USB_ENDPOINT_NUMBER_MASK;
+				if (dir) /* TX */
+					num += hw_ep_max/2;
 
 				spin_unlock(udc->lock);
 				err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 5/7] USB: gadget: Use ep0out for control OUT data phase in ci13xxx_udc

[Pavankumar Kondeti]

The current code queue the control OUT data request to ep0in instead of
ep0out.  Check ep0_dir and use the correct control endpoint.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 1b095cb..09c76a1 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1843,6 +1843,7 @@ __releases(mEp->lock)
 __acquires(mEp->lock)
 {
 	struct ci13xxx_req *mReq, *mReqTemp;
+	struct ci13xxx_ep *mEpTemp = mEp;
 	int uninitialized_var(retval);
 
 	trace("%p", mEp);
@@ -1859,7 +1860,10 @@ __acquires(mEp->lock)
 		dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
 		if (mReq->req.complete != NULL) {
 			spin_unlock(mEp->lock);
-			mReq->req.complete(&mEp->ep, &mReq->req);
+			if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
+					mReq->req.length)
+				mEpTemp = &_udc->ep0in;
+			mReq->req.complete(&mEpTemp->ep, &mReq->req);
 			spin_lock(mEp->lock);
 		}
 	}
@@ -2248,11 +2252,15 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
 
 	spin_lock_irqsave(mEp->lock, flags);
 
-	if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
-	    !list_empty(&mEp->qh.queue)) {
-		_ep_nuke(mEp);
-		retval = -EOVERFLOW;
-		warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+	if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+		if (req->length)
+			mEp = (_udc->ep0_dir == RX) ?
+				&_udc->ep0out : &_udc->ep0in;
+		if (!list_empty(&mEp->qh.queue)) {
+			_ep_nuke(mEp);
+			retval = -EOVERFLOW;
+			warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+		}
 	}
 
 	/* first nuke then test link, e.g. previous status has not sent */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 6/7] USB: gadget: Initialize ep0 once while registering gadget in ci13xxx_udc

[Pavankumar Kondeti]

From: Anji jonnala <anjir@codeaurora.org>

Some of the simulators may cache the ep0 maxpacket size to zero
if the ep0 dQh is not setup before enabling the pullup. Hence
Setup ep0 and initialize the dQh fields once while registering the
gadget(before enabling the pullup).

HSUSB Chipidea link controller spec says ep0 is enabled always
in the HW. Hence disabling and enabling the ep0 as a part of
reset interrupt is unneccesary.
Remove the disable/enable ep0 logic from reset interrupt handling.

Signed-off-by: Anji jonnala <anjir@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/gadget/ci13xxx_udc.c |   31 +++++++++++++++++--------------
 1 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 09c76a1..68123ee 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1634,8 +1634,6 @@ static int _gadget_stop_activity(struct usb_gadget *gadget)
 	gadget_for_each_ep(ep, gadget) {
 		usb_ep_disable(ep);
 	}
-	usb_ep_disable(&udc->ep0out.ep);
-	usb_ep_disable(&udc->ep0in.ep);
 
 	if (udc->status != NULL) {
 		usb_ep_free_request(&udc->ep0in.ep, udc->status);
@@ -1678,18 +1676,10 @@ __acquires(udc->lock)
 	if (retval)
 		goto done;
 
-	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
-	if (retval)
-		goto done;
+	udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
+	if (udc->status == NULL)
+		retval = -ENOMEM;
 
-	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
-	if (!retval) {
-		udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
-		if (udc->status == NULL) {
-			usb_ep_disable(&udc->ep0out.ep);
-			retval = -ENOMEM;
-		}
-	}
 	spin_lock(udc->lock);
 
  done:
@@ -2120,7 +2110,12 @@ static int ep_enable(struct usb_ep *ep,
 		(mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
 	mEp->qh.ptr->td.next |= TD_TERMINATE;   /* needed? */
 
-	retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
+	/*
+	 * Enable endpoints in the HW other than ep0 as ep0
+	 * is always enabled
+	 */
+	if (mEp->num)
+		retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
 
 	spin_unlock_irqrestore(mEp->lock, flags);
 	return retval;
@@ -2609,6 +2604,14 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
 	}
 	if (retval)
 		goto done;
+	spin_unlock_irqrestore(udc->lock, flags);
+	retval = usb_ep_enable(&udc->ep0out.ep, &ctrl_endpt_out_desc);
+	if (retval)
+		return retval;
+	retval = usb_ep_enable(&udc->ep0in.ep, &ctrl_endpt_in_desc);
+	if (retval)
+		return retval;
+	spin_lock_irqsave(udc->lock, flags);
 
 	udc->gadget.ep0 = &udc->ep0in.ep;
 	/* bind gadget */
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH V2 7/7] USB: OTG: msm: Clear in_lpm flag before enabling the IRQ in resume

[Pavankumar Kondeti]

The current code is clearing in_lpm flag after enabling the IRQ.
If IRQ comes immediately before in_lpm flag is set, it thinks that
hardware is in low power mode and disables the IRQ.  Fix this by
clearing in_lpm flag before enabling the IRQ.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/otg/msm_otg.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c
index 2965986..f58b7da 100644
--- a/drivers/usb/otg/msm_otg.c
+++ b/drivers/usb/otg/msm_otg.c
@@ -389,14 +389,14 @@ skip_phy_resume:
 	if (bus)
 		set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
 
+	atomic_set(&motg->in_lpm, 0);
+
 	if (motg->async_int) {
 		motg->async_int = 0;
 		pm_runtime_put(otg->dev);
 		enable_irq(motg->irq);
 	}
 
-	atomic_set(&motg->in_lpm, 0);
-
 	dev_info(otg->dev, "USB exited from low power mode\n");
 
 	return 0;
-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.