USB: serial: add metro-usb driver to the tree

This driver is for the Metrologic barcode scanner.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/metro-usb.h

+/*
+  Date Created:	1/12/2007
+  File Name:		metro-usb.h
+  Description:	metro-usb.h is the drivers header file. The driver is a USB to Serial converter.
+		The driver takes USB data and sends it to a virtual ttyUSB# serial port.
+		The driver interfaces with the usbserial.ko driver supplied by Linux.
+
+		NOTES:
+		To install the driver:
+		1. Install the usbserial.ko module supplied by Linux with: # insmod usbserial.ko
+		2. Install the metro-usb.ko module with: # insmod metro-usb.ko vender=0x#### product=0x#### debug=1
+		   The vendor, product and debug parameters are optional.
+
+  Copyright:	2007 Metrologic Instruments. All rights reserved.
+  Copyright:	2011 Azimut Ltd. <http://azimutrzn.ru/>
+  Requirements: Notepad.exe
+
+  Revision History:
+
+  Date:			Developer:			Revisions:
+  ------------------------------------------------------------------------------
+  1/12/2007		Philip Nicastro		Initial release. (v1.0.0.0)
+  10/07/2011		Aleksey Babahin		Update for new kernel (tested on 2.6.38)
+						Add unidirection mode support
+
+
+*/
+
+#ifndef __LINUX_USB_SERIAL_METRO
+#define __LINUX_USB_SERIAL_METRO
+
+/* Product information. */
+#define FOCUS_VENDOR_ID		0x0C2E
+#define FOCUS_PRODUCT_ID	0x0720
+#define FOCUS_PRODUCT_ID_UNI	0x0710
+
+#define METROUSB_SET_REQUEST_TYPE	0x40
+#define METROUSB_SET_MODEM_CTRL_REQUEST	10
+#define METROUSB_SET_BREAK_REQUEST	0x40
+#define METROUSB_MCR_NONE               0x8     /* Deactivate DTR and RTS. */
+#define METROUSB_MCR_RTS                0xa     /* Activate RTS. */
+#define METROUSB_MCR_DTR                0x9     /* Activate DTR. */
+#define WDR_TIMEOUT			5000 	/* default urb timeout. */
+
+/* Private data structure. */
+struct metrousb_private {
+	spinlock_t lock;
+	int throttled;
+	unsigned long control_state;
+};
+
+#endif