usb: renesas_usbhs: tifyup packet start timing

packet transfer timing are controlled in mod_gadget on current renesas_usbhs,
and this style will be imitated on mod_host.
But it need not be managed with host/gadget if it is general transfer.
By this patch, the packet transfer timing is managed in fifo.c

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/renesas_usbhs/fifo.c

@@ -74,6 +74,8 @@ void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
 
 	usbhs_unlock(priv, flags);
 	/********************  spin unlock ******************/
+
+	usbhs_pkt_start(pipe);
 }
 
 static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
@@ -148,8 +150,10 @@ __usbhs_pkt_handler_end:
 	usbhs_unlock(priv, flags);
 	/********************  spin unlock ******************/
 
-	if (is_done)
+	if (is_done) {
 		info->done(pkt);
+		usbhs_pkt_start(pipe);
+	}
 
 	return ret;
 }

drivers/usb/renesas_usbhs/mod_gadget.c

@@ -125,23 +125,16 @@ static void usbhsg_queue_push(struct usbhsg_uep *uep,
 	struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 	struct usb_request *req = &ureq->req;
 
-	usbhs_pkt_push(pipe, pkt, uep->handler,
-		       req->buf, req->length, req->zero);
 	req->actual = 0;
 	req->status = -EINPROGRESS;
+	usbhs_pkt_push(pipe, pkt, uep->handler,
+		       req->buf, req->length, req->zero);
 
 	dev_dbg(dev, "pipe %d : queue push (%d)\n",
 		usbhs_pipe_number(pipe),
 		req->length);
 }
 
-static void usbhsg_queue_start(struct usbhsg_uep *uep)
-{
-	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
-
-	usbhs_pkt_start(pipe);
-}
-
 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 			     struct usbhsg_request *ureq,
 			     int status)
@@ -154,10 +147,6 @@ static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 
 	ureq->req.status = status;
 	ureq->req.complete(&uep->ep, &ureq->req);
-
-	/* more request ? */
-	if (0 == status)
-		usbhsg_queue_start(uep);
 }
 
 static void usbhsg_queue_done(struct usbhs_pkt *pkt)
@@ -222,6 +211,7 @@ static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 	struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 	struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 	struct usbhsg_uep *uep;
+	struct usbhs_pipe *pipe;
 	int recip = ctrl->bRequestType & USB_RECIP_MASK;
 	int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
 	int ret;
@@ -230,7 +220,8 @@ static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 	char *msg;
 
 	uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
-	if (!usbhsg_uep_to_pipe(uep)) {
+	pipe = usbhsg_uep_to_pipe(uep);
+	if (!pipe) {
 		dev_err(dev, "wrong recip request\n");
 		ret = -EINVAL;
 		goto usbhsg_recip_run_handle_end;
@@ -268,7 +259,7 @@ static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
 	}
 
 usbhsg_recip_run_handle_end:
-	usbhsg_queue_start(uep);
+	usbhs_pkt_start(pipe);
 
 	return ret;
 }
@@ -470,7 +461,6 @@ static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 		return -ESHUTDOWN;
 
 	usbhsg_queue_push(uep, ureq);
-	usbhsg_queue_start(uep);
 
 	return 0;
 }