1. 根目录:
2. drivers
3. usb
4. serial
5. hp4x.c

/*
 * HP4x Calculators Serial USB driver
 *
 * Copyright (C) 2005 Arthur Huillet (ahuillet@users.sf.net)
 * Copyright (C) 2001-2005 Greg Kroah-Hartman (greg@kroah.com)
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>

#define DRIVER_DESC "HP4x (48/49) Generic Serial driver"

#define HP_VENDOR_ID 0x03f0
#define HP49GP_PRODUCT_ID 0x0121

static const struct usb_device_id id_table[] = {
	{ USB_DEVICE(HP_VENDOR_ID, HP49GP_PRODUCT_ID) },
	{ }					/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_serial_driver hp49gp_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"hp4X",
	},
	.id_table =		id_table,
	.num_ports =		1,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&hp49gp_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");