From 6166c24669678662547bb4e5dbd6a810268b8b7b Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Thu, 24 Jan 2013 17:11:44 +0200
Subject: [PATCH] usb: gadget: pxa25x_udc: convert to udc_start/udc_stop

Mechanical change making use of the new (can we
still call it new ?) interface for registering
UDC drivers.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/gadget/pxa25x_udc.c | 62 ++++++++-------------------------
 drivers/usb/gadget/pxa25x_udc.h |  1 +
 2 files changed, 15 insertions(+), 48 deletions(-)

diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index d4ca9f1f7f24..fa9c34469a82 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -996,9 +996,10 @@ static int pxa25x_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
 	return -EOPNOTSUPP;
 }
 
-static int pxa25x_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
-static int pxa25x_stop(struct usb_gadget_driver *driver);
+static int pxa25x_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
+static int pxa25x_udc_stop(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
 
 static const struct usb_gadget_ops pxa25x_udc_ops = {
 	.get_frame	= pxa25x_udc_get_frame,
@@ -1006,8 +1007,8 @@ static const struct usb_gadget_ops pxa25x_udc_ops = {
 	.vbus_session	= pxa25x_udc_vbus_session,
 	.pullup		= pxa25x_udc_pullup,
 	.vbus_draw	= pxa25x_udc_vbus_draw,
-	.start		= pxa25x_start,
-	.stop		= pxa25x_stop,
+	.udc_start	= pxa25x_udc_start,
+	.udc_stop	= pxa25x_udc_stop,
 };
 
 /*-------------------------------------------------------------------------*/
@@ -1254,23 +1255,12 @@ static void udc_enable (struct pxa25x_udc *dev)
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-static int pxa25x_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
+static int pxa25x_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver)
 {
-	struct pxa25x_udc	*dev = the_controller;
+	struct pxa25x_udc	*dev = to_pxa25x(g);
 	int			retval;
 
-	if (!driver
-			|| driver->max_speed < USB_SPEED_FULL
-			|| !bind
-			|| !driver->disconnect
-			|| !driver->setup)
-		return -EINVAL;
-	if (!dev)
-		return -ENODEV;
-	if (dev->driver)
-		return -EBUSY;
-
 	/* first hook up the driver ... */
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
@@ -1278,34 +1268,20 @@ static int pxa25x_start(struct usb_gadget_driver *driver,
 
 	retval = device_add (&dev->gadget.dev);
 	if (retval) {
-fail:
 		dev->driver = NULL;
 		dev->gadget.dev.driver = NULL;
 		return retval;
 	}
-	retval = bind(&dev->gadget, driver);
-	if (retval) {
-		DMSG("bind to driver %s --> error %d\n",
-				driver->driver.name, retval);
-		device_del (&dev->gadget.dev);
-		goto fail;
-	}
 
 	/* ... then enable host detection and ep0; and we're ready
 	 * for set_configuration as well as eventual disconnect.
 	 */
-	DMSG("registered gadget driver '%s'\n", driver->driver.name);
-
 	/* connect to bus through transceiver */
 	if (!IS_ERR_OR_NULL(dev->transceiver)) {
 		retval = otg_set_peripheral(dev->transceiver->otg,
 						&dev->gadget);
-		if (retval) {
-			DMSG("can't bind to transceiver\n");
-			if (driver->unbind)
-				driver->unbind(&dev->gadget);
+		if (retval)
 			goto bind_fail;
-		}
 	}
 
 	pullup(dev);
@@ -1334,22 +1310,14 @@ stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
 	}
 	del_timer_sync(&dev->timer);
 
-	/* report disconnect; the driver is already quiesced */
-	if (driver)
-		driver->disconnect(&dev->gadget);
-
 	/* re-init driver-visible data structures */
 	udc_reinit(dev);
 }
 
-static int pxa25x_stop(struct usb_gadget_driver *driver)
+static int pxa25x_udc_stop(struct usb_gadget*g,
+		struct usb_gadget_driver *driver)
 {
-	struct pxa25x_udc	*dev = the_controller;
-
-	if (!dev)
-		return -ENODEV;
-	if (!driver || driver != dev->driver || !driver->unbind)
-		return -EINVAL;
+	struct pxa25x_udc	*dev = to_pxa25x(g);
 
 	local_irq_disable();
 	dev->pullup = 0;
@@ -1360,14 +1328,12 @@ static int pxa25x_stop(struct usb_gadget_driver *driver)
 	if (!IS_ERR_OR_NULL(dev->transceiver))
 		(void) otg_set_peripheral(dev->transceiver->otg, NULL);
 
-	driver->unbind(&dev->gadget);
 	dev->gadget.dev.driver = NULL;
 	dev->driver = NULL;
 
 	device_del (&dev->gadget.dev);
-
-	DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
 	dump_state(dev);
+
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/pxa25x_udc.h b/drivers/usb/gadget/pxa25x_udc.h
index 2eca1e71fecd..3fe5931dc21a 100644
--- a/drivers/usb/gadget/pxa25x_udc.h
+++ b/drivers/usb/gadget/pxa25x_udc.h
@@ -126,6 +126,7 @@ struct pxa25x_udc {
 	struct dentry				*debugfs_udc;
 #endif
 };
+#define to_pxa25x(g)	(container_of((g), struct pxa25x_udc, gadget))
 
 /*-------------------------------------------------------------------------*/