From ac1aa6a21747d02a93b1becb4ab19f1fc9de2beb Mon Sep 17 00:00:00 2001 From: Anji jonnala Date: Mon, 2 May 2011 11:56:32 +0530 Subject: [PATCH] USB: gadget: Initialize ep0 once while registering gadget in ci13xxx_udc 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 Signed-off-by: Pavankumar Kondeti Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/ci13xxx_udc.c | 31 +++++++++++++++++-------------- 1 file changed, 17 insertions(+), 14 deletions(-) diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c index 09c76a17a104..68123ee01392 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 */ -- GitLab