text: /*
   * $Id: usbmouse.c,v 1.1.1.4 2003/10/14 08:08:51 sparq Exp $
   *
   *  Copyright (c) 1999-2000 Vojtech Pavlik
   *
   *  USB HIDBP Mouse support
   *
   *  Sponsored by SuSE
   */
  
  /*
   * 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.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   * 
   * Should you need to contact me, the author, you can do so either by
   * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
   * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
   */
  
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/input.h>
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/usb.h>
  
  /*
   * Version Information
   */
  #define DRIVER_VERSION "v1.6"
  #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
  #define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  
  MODULE_AUTHOR( DRIVER_AUTHOR );
  MODULE_DESCRIPTION( DRIVER_DESC );
  MODULE_LICENSE("GPL");
  
  struct usb_mouse {
  	signed char data[8];
  	char name[128];
  	struct usb_device *usbdev;
  	struct input_dev dev;
  	struct urb irq;
  	int open;
  };
  
  static void usb_mouse_irq(struct urb *urb)
  {
  	struct usb_mouse *mouse = urb->context;
  	signed char *data = mouse->data;
  	struct input_dev *dev = &mouse->dev;
  
  	if (urb->status) return;
  
  	input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  	input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  	input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  	input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  	input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  
  	input_report_rel(dev, REL_X,     data[1]);
  	input_report_rel(dev, REL_Y,     data[2]);
  	input_report_rel(dev, REL_WHEEL, data[3]);
  }
  
  static int usb_mouse_open(struct input_dev *dev)
  {
  	struct usb_mouse *mouse = dev->private;
  
  	if (mouse->open++)
  		return 0;
  
  	mouse->irq.dev = mouse->usbdev;
  	if (usb_submit_urb(&mouse->irq))
  		return -EIO;
  
  	return 0;
  }
  
  static void usb_mouse_close(struct input_dev *dev)
  {
  	struct usb_mouse *mouse = dev->private;
  
  	if (!--mouse->open)
  		usb_unlink_urb(&mouse->irq);
  }
  
  static void *usb_mouse_probe(struct usb_device *dev, unsigned int ifnum,
  			     const struct usb_device_id *id)
  {
  	struct usb_interface *iface;
  	struct usb_interface_descriptor *interface;
  	struct usb_endpoint_descriptor *endpoint;
  	struct usb_mouse *mouse;
  	int pipe, maxp;
  	char *buf;
  
  	iface = &dev->actconfig->interface[ifnum];
  	interface = &iface->altsetting[iface->act_altsetting];
  
  	if (interface->bNumEndpoints != 1) return NULL;
  
  	endpoint = interface->endpoint + 0;
  	if (!(endpoint->bEndpointAddress & 0x80)) return NULL;
  	if ((endpoint->bmAttributes & 3) != 3) return NULL;
  	/* wacom tablets match... */
   	if (dev->descriptor.idVendor == 0x056a) return NULL;
  	
  	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
  	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
  
  	usb_set_idle(dev, interface->bInterfaceNumber, 0, 0);
  
  	if (!(mouse = kmalloc(sizeof(struct usb_mouse), GFP_KERNEL))) return NULL;
  	memset(mouse, 0, sizeof(struct usb_mouse));
  
  	mouse->usbdev = dev;
  
  	mouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
  	mouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
  	mouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
  	mouse->dev.keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
  	mouse->dev.relbit[0] |= BIT(REL_WHEEL);
  
  	mouse->dev.private = mouse;
  	mouse->dev.open = usb_mouse_open;
  	mouse->dev.close = usb_mouse_close;
  
  	mouse->dev.name = mouse->name;
  	mouse->dev.idbus = BUS_USB;
  	mouse->dev.idvendor = dev->descriptor.idVendor;
  	mouse->dev.idproduct = dev->descriptor.idProduct;
  	mouse->dev.idversion = dev->descriptor.bcdDevice;
  
  	if (!(buf = kmalloc(63, GFP_KERNEL))) {
  		kfree(mouse);
  		return NULL;
  	}
  
  	if (dev->descriptor.iManufacturer &&
  		usb_string(dev, dev->descriptor.iManufacturer, buf, 63) > 0)
  			strcat(mouse->name, buf);
  	if (dev->descriptor.iProduct &&
  		usb_string(dev, dev->descriptor.iProduct, buf, 63) > 0)
  			sprintf(mouse->name, "%s %s", mouse->name, buf);
  
  	if (!strlen(mouse->name))
  		sprintf(mouse->name, "USB HIDBP Mouse %04x:%04x",
  			mouse->dev.idvendor, mouse->dev.idproduct);
  
  	kfree(buf);
  
  	FILL_INT_URB(&mouse->irq, dev, pipe, mouse->data, maxp > 8 ? 8 : maxp,
  		usb_mouse_irq, mouse, endpoint->bInterval);
  
  	input_register_device(&mouse->dev);
  
  	printk(KERN_INFO "input%d: %s on usb%d:%d.%d\n",
  		 mouse->dev.number, mouse->name, dev->bus->busnum, dev->devnum, ifnum);
  
  	return mouse;
  }
  
  static void usb_mouse_disconnect(struct usb_device *dev, void *ptr)
  {
  	struct usb_mouse *mouse = ptr;
  	usb_unlink_urb(&mouse->irq);
  	input_unregister_device(&mouse->dev);
  	kfree(mouse);
  }
  
  static struct usb_device_id usb_mouse_id_table [] = {
  	{ USB_INTERFACE_INFO(3, 1, 2) },
      { }						/* Terminating entry */
  };
  
  MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
  
  static struct usb_driver usb_mouse_driver = {
  	name:		"usb_mouse",
  	probe:		usb_mouse_probe,
  	disconnect:	usb_mouse_disconnect,
  	id_table:	usb_mouse_id_table,
  };
  
  static int __init usb_mouse_init(void)
  {
  	usb_register(&usb_mouse_driver);
  	info(DRIVER_VERSION ":" DRIVER_DESC);
  	return 0;
  }
  
  static void __exit usb_mouse_exit(void)
  {
  	usb_deregister(&usb_mouse_driver);
  }
  
  module_init(usb_mouse_init);
  module_exit(usb_mouse_exit);
  