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From: Peter Chen <peter.chen@nxp.com>
To: "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Cc: dl-linux-imx <linux-imx@nxp.com>, Peter Chen <peter.chen@nxp.com>,
	Jun Li <jun.li@nxp.com>
Subject: [PATCH 1/2] usb: chipidea: udc: add new API ci_hdrc_gadget_connect
Date: Tue, 10 Sep 2019 07:01:21 +0000	[thread overview]
Message-ID: <20190910070141.9321-1-peter.chen@nxp.com> (raw)

This API is used enable device function, it is called at below
situations:
- VBUS is connected during boots up
- Hot plug occurs during runtime

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Jun Li <jun.li@nxp.com>
---
 drivers/usb/chipidea/udc.c | 63 +++++++++++++++++++-------------------
 1 file changed, 32 insertions(+), 31 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 8f18e7b6cadf..59f31c7a7136 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1524,6 +1524,33 @@ static const struct usb_ep_ops usb_ep_ops = {
 /******************************************************************************
  * GADGET block
  *****************************************************************************/
+/**
+ * ci_hdrc_gadget_connect: caller makes sure gadget driver is binded
+ */
+static void ci_hdrc_gadget_connect(struct usb_gadget *_gadget, int is_active)
+{
+	struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
+
+	if (is_active) {
+		pm_runtime_get_sync(&_gadget->dev);
+		hw_device_reset(ci);
+		hw_device_state(ci, ci->ep0out->qh.dma);
+		usb_gadget_set_state(_gadget, USB_STATE_POWERED);
+		usb_udc_vbus_handler(_gadget, true);
+	} else {
+		usb_udc_vbus_handler(_gadget, false);
+		if (ci->driver)
+			ci->driver->disconnect(&ci->gadget);
+		hw_device_state(ci, 0);
+		if (ci->platdata->notify_event)
+			ci->platdata->notify_event(ci,
+			CI_HDRC_CONTROLLER_STOPPED_EVENT);
+		_gadget_stop_activity(&ci->gadget);
+		pm_runtime_put_sync(&_gadget->dev);
+		usb_gadget_set_state(_gadget, USB_STATE_NOTATTACHED);
+	}
+}
+
 static int ci_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
 {
 	struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
@@ -1540,26 +1567,8 @@ static int ci_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
 		usb_phy_set_charger_state(ci->usb_phy, is_active ?
 			USB_CHARGER_PRESENT : USB_CHARGER_ABSENT);
 
-	if (gadget_ready) {
-		if (is_active) {
-			pm_runtime_get_sync(&_gadget->dev);
-			hw_device_reset(ci);
-			hw_device_state(ci, ci->ep0out->qh.dma);
-			usb_gadget_set_state(_gadget, USB_STATE_POWERED);
-			usb_udc_vbus_handler(_gadget, true);
-		} else {
-			usb_udc_vbus_handler(_gadget, false);
-			if (ci->driver)
-				ci->driver->disconnect(&ci->gadget);
-			hw_device_state(ci, 0);
-			if (ci->platdata->notify_event)
-				ci->platdata->notify_event(ci,
-				CI_HDRC_CONTROLLER_STOPPED_EVENT);
-			_gadget_stop_activity(&ci->gadget);
-			pm_runtime_put_sync(&_gadget->dev);
-			usb_gadget_set_state(_gadget, USB_STATE_NOTATTACHED);
-		}
-	}
+	if (gadget_ready)
+		ci_hdrc_gadget_connect(_gadget, is_active);
 
 	return 0;
 }
@@ -1785,18 +1794,10 @@ static int ci_udc_start(struct usb_gadget *gadget,
 		return retval;
 	}
 
-	pm_runtime_get_sync(&ci->gadget.dev);
-	if (ci->vbus_active) {
-		hw_device_reset(ci);
-	} else {
+	if (ci->vbus_active)
+		ci_hdrc_gadget_connect(gadget, 1);
+	else
 		usb_udc_vbus_handler(&ci->gadget, false);
-		pm_runtime_put_sync(&ci->gadget.dev);
-		return retval;
-	}
-
-	retval = hw_device_state(ci, ci->ep0out->qh.dma);
-	if (retval)
-		pm_runtime_put_sync(&ci->gadget.dev);
 
 	return retval;
 }
-- 
2.17.1


             reply	other threads:[~2019-09-10  7:01 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-10  7:01 Peter Chen [this message]
2019-09-10  7:01 ` [PATCH 2/2] usb: chipidea: udc: protect usb interrupt enable Peter Chen

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