text: /*
   *  Atari mouse driver for Linux/m68k
   *
   *  Copyright (c) 2005 Michael Schmitz
   *
   *  Based on:
   *  Amiga mouse driver for Linux/m68k
   *
   *  Copyright (c) 2000-2002 Vojtech Pavlik
   *
   */
  /*
   * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
   * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
   * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
   * This driver only deals with handing key events off to the input layer.
   *
   * Largely based on the old:
   *
   * Atari Mouse Driver for Linux
   * by Robert de Vries (robert@and.nl) 19Jul93
   *
   * 16 Nov 1994 Andreas Schwab
   * Compatibility with busmouse
   * Support for three button mouse (shamelessly stolen from MiNT)
   * third button wired to one of the joystick directions on joystick 1
   *
   * 1996/02/11 Andreas Schwab
   * Module support
   * Allow multiple open's
   *
   * Converted to use new generic busmouse code.  5 Apr 1998
   *   Russell King <rmk@arm.uk.linux.org>
   */
  
  
  /*
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published by
   * the Free Software Foundation
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/input.h>
  #include <linux/interrupt.h>
  
  #include <asm/irq.h>
  #include <asm/setup.h>
  #include <asm/uaccess.h>
  #include <asm/atarihw.h>
  #include <asm/atarikb.h>
  #include <asm/atariints.h>
  
  MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
  MODULE_DESCRIPTION("Atari mouse driver");
  MODULE_LICENSE("GPL");
  
  static int mouse_threshold[2] = {2, 2};
  module_param_array(mouse_threshold, int, NULL, 0);
  
  #ifdef FIXED_ATARI_JOYSTICK
  extern int atari_mouse_buttons;
  #endif
  
  static struct input_dev *atamouse_dev;
  
  static void atamouse_interrupt(char *buf)
  {
  	int buttons, dx, dy;
  
  	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
  #ifdef FIXED_ATARI_JOYSTICK
  	buttons |= atari_mouse_buttons & 2;
  	atari_mouse_buttons = buttons;
  #endif
  
  	/* only relative events get here */
  	dx = buf[1];
  	dy = buf[2];
  
  	input_report_rel(atamouse_dev, REL_X, dx);
  	input_report_rel(atamouse_dev, REL_Y, dy);
  
  	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
  	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
  	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
  
  	input_sync(atamouse_dev);
  
  	return;
  }
  
  static int atamouse_open(struct input_dev *dev)
  {
  #ifdef FIXED_ATARI_JOYSTICK
  	atari_mouse_buttons = 0;
  #endif
  	ikbd_mouse_y0_top();
  	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
  	ikbd_mouse_rel_pos();
  	atari_input_mouse_interrupt_hook = atamouse_interrupt;
  
  	return 0;
  }
  
  static void atamouse_close(struct input_dev *dev)
  {
  	ikbd_mouse_disable();
  	atari_input_mouse_interrupt_hook = NULL;
  }
  
  static int __init atamouse_init(void)
  {
  	int error;
  
  	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
  		return -ENODEV;
  
  	error = atari_keyb_init();
  	if (error)
  		return error;
  
  	atamouse_dev = input_allocate_device();
  	if (!atamouse_dev)
  		return -ENOMEM;
  
  	atamouse_dev->name = "Atari mouse";
  	atamouse_dev->phys = "atamouse/input0";
  	atamouse_dev->id.bustype = BUS_HOST;
  	atamouse_dev->id.vendor = 0x0001;
  	atamouse_dev->id.product = 0x0002;
  	atamouse_dev->id.version = 0x0100;
  
  	atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
  	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
  	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
  		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
  
  	atamouse_dev->open = atamouse_open;
  	atamouse_dev->close = atamouse_close;
  
  	error = input_register_device(atamouse_dev);
  	if (error) {
  		input_free_device(atamouse_dev);
  		return error;
  	}
  
  	return 0;
  }
  
  static void __exit atamouse_exit(void)
  {
  	input_unregister_device(atamouse_dev);
  }
  
  module_init(atamouse_init);
  module_exit(atamouse_exit);
  