From 45005f6927d98d9a3364287a6e9faca7121cc8f1 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Thu, 24 Jan 2013 10:28:39 +0200
Subject: [PATCH] usb: gadget: amd5536udc: 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/amd5536udc.c | 59 ++++++++-------------------------
 drivers/usb/gadget/amd5536udc.h |  2 ++
 2 files changed, 16 insertions(+), 45 deletions(-)

diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index fc0ec5e0d58e..3dac001aebf0 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1400,15 +1400,16 @@ static int udc_wakeup(struct usb_gadget *gadget)
 	return 0;
 }
 
-static int amd5536_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
-static int amd5536_stop(struct usb_gadget_driver *driver);
+static int amd5536_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
+static int amd5536_udc_stop(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
 /* gadget operations */
 static const struct usb_gadget_ops udc_ops = {
 	.wakeup		= udc_wakeup,
 	.get_frame	= udc_get_frame,
-	.start		= amd5536_start,
-	.stop		= amd5536_stop,
+	.udc_start	= amd5536_udc_start,
+	.udc_stop	= amd5536_udc_stop,
 };
 
 /* Setups endpoint parameters, adds endpoints to linked list */
@@ -1913,41 +1914,22 @@ static int setup_ep0(struct udc *dev)
 }
 
 /* Called by gadget driver to register itself */
-static int amd5536_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
+static int amd5536_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver)
 {
-	struct udc		*dev = udc;
-	int			retval;
+	struct udc *dev = to_amd5536_udc(g);
 	u32 tmp;
 
-	if (!driver || !bind || !driver->setup
-			|| driver->max_speed < USB_SPEED_HIGH)
-		return -EINVAL;
-	if (!dev)
-		return -ENODEV;
-	if (dev->driver)
-		return -EBUSY;
-
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
 
-	retval = bind(&dev->gadget, driver);
-
 	/* Some gadget drivers use both ep0 directions.
 	 * NOTE: to gadget driver, ep0 is just one endpoint...
 	 */
 	dev->ep[UDC_EP0OUT_IX].ep.driver_data =
 		dev->ep[UDC_EP0IN_IX].ep.driver_data;
 
-	if (retval) {
-		DBG(dev, "binding to %s returning %d\n",
-				driver->driver.name, retval);
-		dev->driver = NULL;
-		dev->gadget.dev.driver = NULL;
-		return retval;
-	}
-
 	/* get ready for ep0 traffic */
 	setup_ep0(dev);
 
@@ -1969,14 +1951,9 @@ __acquires(dev->lock)
 {
 	int tmp;
 
-	if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
-		spin_unlock(&dev->lock);
-		driver->disconnect(&dev->gadget);
-		spin_lock(&dev->lock);
-	}
-
 	/* empty queues and init hardware */
 	udc_basic_init(dev);
+
 	for (tmp = 0; tmp < UDC_EP_NUM; tmp++)
 		empty_req_queue(&dev->ep[tmp]);
 
@@ -1984,23 +1961,18 @@ __acquires(dev->lock)
 }
 
 /* Called by gadget driver to unregister itself */
-static int amd5536_stop(struct usb_gadget_driver *driver)
+static int amd5536_udc_stop(struct usb_gadget *g,
+		struct usb_gadget_driver *driver)
 {
-	struct udc	*dev = udc;
-	unsigned long	flags;
+	struct udc *dev = to_amd5536_udc(g);
+	unsigned long flags;
 	u32 tmp;
 
-	if (!dev)
-		return -ENODEV;
-	if (!driver || driver != dev->driver || !driver->unbind)
-		return -EINVAL;
-
 	spin_lock_irqsave(&dev->lock, flags);
 	udc_mask_unused_interrupts(dev);
 	shutdown(dev, driver);
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	driver->unbind(&dev->gadget);
 	dev->gadget.dev.driver = NULL;
 	dev->driver = NULL;
 
@@ -2009,9 +1981,6 @@ static int amd5536_stop(struct usb_gadget_driver *driver)
 	tmp |= AMD_BIT(UDC_DEVCTL_SD);
 	writel(tmp, &dev->regs->ctl);
 
-
-	DBG(dev, "%s: unregistered\n", driver->driver.name);
-
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/amd5536udc.h b/drivers/usb/gadget/amd5536udc.h
index 14af87d65caa..f1bf32e6b8d8 100644
--- a/drivers/usb/gadget/amd5536udc.h
+++ b/drivers/usb/gadget/amd5536udc.h
@@ -563,6 +563,8 @@ struct udc {
 	u16				cur_alt;
 };
 
+#define to_amd5536_udc(g)	(container_of((g), struct udc, gadget))
+
 /* setup request data */
 union udc_setup_data {
 	u32			data[2];
-- 
2.30.2