V4L/DVB (11077): au0828: properly handle missing analog USB endpoint

Move the setup of the analog isoc handler into au0828-video.c, so it does not
occur if there is not an .input section defined for the board.  Also fixes a
case where if there is an input section but the board does not actually have
analog support, the digital support will continue to work as expected.

Thanks to Michael Krufky <mkrufky@linuxtv.org> for providing sample hardware
of various configurations to test with.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/au0828/au0828-core.c

@@ -165,11 +165,9 @@ static void au0828_usb_disconnect(struct usb_interface *interface)
 static int au0828_usb_probe(struct usb_interface *interface,
 	const struct usb_device_id *id)
 {
-	int ifnum, i;
+	int ifnum;
 	struct au0828_dev *dev;
 	struct usb_device *usbdev = interface_to_usbdev(interface);
-	struct usb_host_interface *iface_desc;
-	struct usb_endpoint_descriptor *endpoint;
 
 	ifnum = interface->altsetting->desc.bInterfaceNumber;
 
@@ -194,30 +192,6 @@ static int au0828_usb_probe(struct usb_interface *interface,
 
 	usb_set_intfdata(interface, dev);
 
-	/* set au0828 usb interface0 to as5 */
-	usb_set_interface(usbdev,
-			  interface->cur_altsetting->desc.bInterfaceNumber, 5);
-
-	/* Figure out which endpoint has the isoc interface */
-	iface_desc = interface->cur_altsetting;
-	for(i = 0; i < iface_desc->desc.bNumEndpoints; i++){
-		endpoint = &iface_desc->endpoint[i].desc;
-		if(((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)	&&
-		   ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)){
-
-			/* we find our isoc in endpoint */
-			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
-			dev->max_pkt_size = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
-			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
-		}
-	}
-	if(!(dev->isoc_in_endpointaddr)) {
-		printk("Could not locate isoc endpoint\n");
-		kfree(dev);
-		return -ENODEV;
-	}
-
-
 	/* Power Up the bridge */
 	au0828_write(dev, REG_600, 1 << 4);
 
@@ -232,7 +206,7 @@ static int au0828_usb_probe(struct usb_interface *interface,
 
 	/* Analog TV */
 	if (dev->board.input != NULL)
-		au0828_analog_register(dev);
+		au0828_analog_register(dev, interface);
 
 	/* Digital TV */
 	au0828_dvb_register(dev);

drivers/media/video/au0828/au0828-video.c

@@ -1618,12 +1618,43 @@ static const struct video_device au0828_video_template = {
 
 /**************************************************************************/
 
-int au0828_analog_register(struct au0828_dev *dev)
+int au0828_analog_register(struct au0828_dev *dev,
+			   struct usb_interface *interface)
 {
 	int retval = -ENOMEM;
+	struct usb_host_interface *iface_desc;
+	struct usb_endpoint_descriptor *endpoint;
+	int i;
 
 	dprintk(1, "au0828_analog_register called!\n");
 
+	/* set au0828 usb interface0 to as5 */
+	retval = usb_set_interface(dev->usbdev,
+				   interface->cur_altsetting->desc.bInterfaceNumber, 5);
+	if (retval != 0) {
+		printk("Failure setting usb interface0 to as5\n");
+		return retval;
+	}
+
+	/* Figure out which endpoint has the isoc interface */
+	iface_desc = interface->cur_altsetting;
+	for(i = 0; i < iface_desc->desc.bNumEndpoints; i++){
+		endpoint = &iface_desc->endpoint[i].desc;
+		if(((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)	&&
+		   ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)){
+
+			/* we find our isoc in endpoint */
+			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
+			dev->max_pkt_size = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
+		}
+	}
+	if(!(dev->isoc_in_endpointaddr)) {
+		printk("Could not locate isoc endpoint\n");
+		kfree(dev);
+		return -ENODEV;
+	}
+
 	init_waitqueue_head(&dev->open);
 	spin_lock_init(&dev->slock);
 	mutex_init(&dev->lock);

drivers/media/video/au0828/au0828.h

@@ -273,7 +273,8 @@ extern void au0828_call_i2c_clients(struct au0828_dev *dev,
 
 /* ----------------------------------------------------------- */
 /* au0828-video.c */
-int au0828_analog_register(struct au0828_dev *dev);
+int au0828_analog_register(struct au0828_dev *dev,
+			   struct usb_interface *interface);
 int au0828_analog_stream_disable(struct au0828_dev *d);
 void au0828_analog_unregister(struct au0828_dev *dev);