LXR linux/drivers/input/mouse/atarimouse.c

   1/*
   2 *  Atari mouse driver for Linux/m68k
   3 *
   4 *  Copyright (c) 2005 Michael Schmitz
   5 *
   6 *  Based on:
   7 *  Amiga mouse driver for Linux/m68k
   8 *
   9 *  Copyright (c) 2000-2002 Vojtech Pavlik
  10 *
  11 */
  12/*
  13 * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
  14 * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
  15 * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
  16 * This driver only deals with handing key events off to the input layer.
  17 *
  18 * Largely based on the old:
  19 *
  20 * Atari Mouse Driver for Linux
  21 * by Robert de Vries (robert@and.nl) 19Jul93
  22 *
  23 * 16 Nov 1994 Andreas Schwab
  24 * Compatibility with busmouse
  25 * Support for three button mouse (shamelessly stolen from MiNT)
  26 * third button wired to one of the joystick directions on joystick 1
  27 *
  28 * 1996/02/11 Andreas Schwab
  29 * Module support
  30 * Allow multiple open's
  31 *
  32 * Converted to use new generic busmouse code.  5 Apr 1998
  33 *   Russell King <rmk@arm.uk.linux.org>
  34 */
  35
  36
  37/*
  38 * This program is free software; you can redistribute it and/or modify it
  39 * under the terms of the GNU General Public License version 2 as published by
  40 * the Free Software Foundation
  41 */
  42
  43#include <linux/module.h>
  44#include <linux/init.h>
  45#include <linux/input.h>
  46#include <linux/interrupt.h>
  47
  48#include <asm/irq.h>
  49#include <asm/setup.h>
  50#include <linux/uaccess.h>
  51#include <asm/atarihw.h>
  52#include <asm/atarikb.h>
  53#include <asm/atariints.h>
  54
  55MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
  56MODULE_DESCRIPTION("Atari mouse driver");
  57MODULE_LICENSE("GPL");
  58
  59static int mouse_threshold[2] = {2, 2};
  60module_param_array(mouse_threshold, int, NULL, 0);
  61
  62#ifdef FIXED_ATARI_JOYSTICK
  63extern int atari_mouse_buttons;
  64#endif
  65
  66static struct input_dev *atamouse_dev;
  67
  68static void atamouse_interrupt(char *buf)
  69{
  70        int buttons, dx, dy;
  71
  72        buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
  73#ifdef FIXED_ATARI_JOYSTICK
  74        buttons |= atari_mouse_buttons & 2;
  75        atari_mouse_buttons = buttons;
  76#endif
  77
  78        /* only relative events get here */
  79        dx = buf[1];
  80        dy = buf[2];
  81
  82        input_report_rel(atamouse_dev, REL_X, dx);
  83        input_report_rel(atamouse_dev, REL_Y, dy);
  84
  85        input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
  86        input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
  87        input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
  88
  89        input_sync(atamouse_dev);
  90
  91        return;
  92}
  93
  94static int atamouse_open(struct input_dev *dev)
  95{
  96#ifdef FIXED_ATARI_JOYSTICK
  97        atari_mouse_buttons = 0;
  98#endif
  99        ikbd_mouse_y0_top();
 100        ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
 101        ikbd_mouse_rel_pos();
 102        atari_input_mouse_interrupt_hook = atamouse_interrupt;
 103
 104        return 0;
 105}
 106
 107static void atamouse_close(struct input_dev *dev)
 108{
 109        ikbd_mouse_disable();
 110        atari_input_mouse_interrupt_hook = NULL;
 111}
 112
 113static int __init atamouse_init(void)
 114{
 115        int error;
 116
 117        if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
 118                return -ENODEV;
 119
 120        error = atari_keyb_init();
 121        if (error)
 122                return error;
 123
 124        atamouse_dev = input_allocate_device();
 125        if (!atamouse_dev)
 126                return -ENOMEM;
 127
 128        atamouse_dev->name = "Atari mouse";
 129        atamouse_dev->phys = "atamouse/input0";
 130        atamouse_dev->id.bustype = BUS_HOST;
 131        atamouse_dev->id.vendor = 0x0001;
 132        atamouse_dev->id.product = 0x0002;
 133        atamouse_dev->id.version = 0x0100;
 134
 135        atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 136        atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 137        atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 138                BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 139
 140        atamouse_dev->open = atamouse_open;
 141        atamouse_dev->close = atamouse_close;
 142
 143        error = input_register_device(atamouse_dev);
 144        if (error) {
 145                input_free_device(atamouse_dev);
 146                return error;
 147        }
 148
 149        return 0;
 150}
 151
 152static void __exit atamouse_exit(void)
 153{
 154        input_unregister_device(atamouse_dev);
 155}
 156
 157module_init(atamouse_init);
 158module_exit(atamouse_exit);
 159