V4L/DVB (9740): sms1xxx: add USB suspend and hibernation support

This patch provides USB suspend and hibernation support
for Siano's SMS chipset based USB device

Signed-off-by: Uri Shkolnik <uris@siano-ms.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/siano/smsusb.c

@@ -432,11 +432,56 @@ static void smsusb_disconnect(struct usb_interface *intf)
 	smsusb_term_device(intf);
 }
 
+static int smsusb_suspend(struct usb_interface *intf, pm_message_t msg)
+{
+	struct smsusb_device_t *dev =
+		(struct smsusb_device_t *)usb_get_intfdata(intf);
+	printk(KERN_INFO "%s  Entering status %d.\n", __func__, msg.event);
+	smsusb_stop_streaming(dev);
+	return 0;
+}
+
+static int smsusb_resume(struct usb_interface *intf)
+{
+	int rc, i;
+	struct smsusb_device_t *dev =
+		(struct smsusb_device_t *)usb_get_intfdata(intf);
+	struct usb_device *udev = interface_to_usbdev(intf);
+
+	printk(KERN_INFO "%s  Entering.\n", __func__);
+	usb_clear_halt(udev, usb_rcvbulkpipe(udev, 0x81));
+	usb_clear_halt(udev, usb_rcvbulkpipe(udev, 0x02));
+
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++)
+		printk(KERN_INFO "endpoint %d %02x %02x %d\n", i,
+		       intf->cur_altsetting->endpoint[i].desc.bEndpointAddress,
+		       intf->cur_altsetting->endpoint[i].desc.bmAttributes,
+		       intf->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
+
+	if (intf->num_altsetting > 0) {
+		rc = usb_set_interface(udev,
+				       intf->cur_altsetting->desc.
+				       bInterfaceNumber, 0);
+		if (rc < 0) {
+			printk(KERN_INFO
+			       "%s usb_set_interface failed, rc %d\n",
+			       __func__, rc);
+			return rc;
+		}
+	}
+
+	smsusb_start_streaming(dev);
+	return 0;
+}
+
 static struct usb_driver smsusb_driver = {
 	.name			= "sms1xxx",
 	.probe			= smsusb_probe,
 	.disconnect		= smsusb_disconnect,
 	.id_table		= smsusb_id_table,
+
+	.suspend		= smsusb_suspend,
+	.resume			= smsusb_resume,
 };
 
 int smsusb_register(void)