[PATCH 1/4] Revert "USB: chipidea: add vbus detect for udc"

[Peter Chen <peter.chen@xxxxxxxxxxxxx>]

vbus register is at otgsc, and vbus detect does not belong
to device function. Revert this patch, and will move
vbus detect function to drivers/usb/chipidea/udc.c

This reverts commit 8c4fc031954b4eb72daf13d3c907a985a3eee208.
---
 drivers/usb/chipidea/ci.h  |    1 -
 drivers/usb/chipidea/udc.c |   39 +--------------------------------------
 2 files changed, 1 insertions(+), 39 deletions(-)

diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index e25d126..d738603 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -139,7 +139,6 @@ struct ci13xxx {
 	enum ci_role			role;
 	bool				is_otg;
 	struct work_struct		work;
-	struct work_struct		vbus_work;
 	struct workqueue_struct		*wq;
 
 	struct dma_pool			*qh_pool;
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 2f45bba..d214448 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -305,18 +305,6 @@ static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci)
 	return reg;
 }
 
-static void hw_enable_vbus_intr(struct ci13xxx *ci)
-{
-	hw_write(ci, OP_OTGSC, OTGSC_AVVIS, OTGSC_AVVIS);
-	hw_write(ci, OP_OTGSC, OTGSC_AVVIE, OTGSC_AVVIE);
-	queue_work(ci->wq, &ci->vbus_work);
-}
-
-static void hw_disable_vbus_intr(struct ci13xxx *ci)
-{
-	hw_write(ci, OP_OTGSC, OTGSC_AVVIE, 0);
-}
-
 /**
  * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
  *                                interruption)
@@ -383,16 +371,6 @@ static int hw_usb_reset(struct ci13xxx *ci)
 	return 0;
 }
 
-static void vbus_work(struct work_struct *work)
-{
-	struct ci13xxx *ci = container_of(work, struct ci13xxx, vbus_work);
-
-	if (hw_read(ci, OP_OTGSC, OTGSC_AVV))
-		usb_gadget_vbus_connect(&ci->gadget);
-	else
-		usb_gadget_vbus_disconnect(&ci->gadget);
-}
-
 /******************************************************************************
  * UTIL block
  *****************************************************************************/
@@ -1392,7 +1370,6 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
 		if (is_active) {
 			pm_runtime_get_sync(&_gadget->dev);
 			hw_device_reset(ci, USBMODE_CM_DC);
-			hw_enable_vbus_intr(ci);
 			hw_device_state(ci, ci->ep0out->qh.dma);
 		} else {
 			hw_device_state(ci, 0);
@@ -1567,10 +1544,8 @@ static int ci13xxx_start(struct usb_gadget *gadget,
 	pm_runtime_get_sync(&ci->gadget.dev);
 	if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) {
 		if (ci->vbus_active) {
-			if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
+			if (ci->platdata->flags & CI13XXX_REGS_SHARED)
 				hw_device_reset(ci, USBMODE_CM_DC);
-				hw_enable_vbus_intr(ci);
-			}
 		} else {
 			pm_runtime_put_sync(&ci->gadget.dev);
 			goto done;
@@ -1676,13 +1651,6 @@ static irqreturn_t udc_irq(struct ci13xxx *ci)
 	} else {
 		retval = IRQ_NONE;
 	}
-
-	intr = hw_read(ci, OP_OTGSC, ~0);
-	hw_write(ci, OP_OTGSC, ~0, intr);
-
-	if (intr & (OTGSC_AVVIE & OTGSC_AVVIS))
-		queue_work(ci->wq, &ci->vbus_work);
-
 	spin_unlock(&ci->lock);
 
 	return retval;
@@ -1758,7 +1726,6 @@ static int udc_start(struct ci13xxx *ci)
 		retval = hw_device_reset(ci, USBMODE_CM_DC);
 		if (retval)
 			goto put_transceiver;
-		hw_enable_vbus_intr(ci);
 	}
 
 	retval = device_register(&ci->gadget.dev);
@@ -1821,9 +1788,6 @@ static void udc_stop(struct ci13xxx *ci)
 	if (ci == NULL)
 		return;
 
-	hw_disable_vbus_intr(ci);
-	cancel_work_sync(&ci->vbus_work);
-
 	usb_del_gadget_udc(&ci->gadget);
 
 	destroy_eps(ci);
@@ -1864,7 +1828,6 @@ int ci_hdrc_gadget_init(struct ci13xxx *ci)
 	rdrv->irq	= udc_irq;
 	rdrv->name	= "gadget";
 	ci->roles[CI_ROLE_GADGET] = rdrv;
-	INIT_WORK(&ci->vbus_work, vbus_work);
 
 	return 0;
 }
-- 
1.7.0.4


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