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 <asm/system.h>
  51 #include <asm/uaccess.h>
  52 #include <asm/atarihw.h>
  53 #include <asm/atarikb.h>
  54 #include <asm/atariints.h>
  55
  56 MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
  57 MODULE_DESCRIPTION("Atari mouse driver");
  58 MODULE_LICENSE("GPL");
  59
  60 static int mouse_threshold[2] = {2,2};
  61
  62 #ifdef __MODULE__
  63 MODULE_PARM(mouse_threshold, "2i");
  64 #endif
  65 #ifdef FIXED_ATARI_JOYSTICK
  66 extern int atari_mouse_buttons;
  67 #endif
  68 static int atamouse_used = 0;
  69
  70 static struct input_dev *atamouse_dev;
  71
  72 static void atamouse_interrupt(char *buf)
  73 {
  74         int buttons, dx, dy;
  75
  76         buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
  77 #ifdef FIXED_ATARI_JOYSTICK
  78         buttons |= atari_mouse_buttons & 2;
  79         atari_mouse_buttons = buttons;
  80 #endif
  81
  82         /* only relative events get here */
  83         dx =  buf[1];
  84         dy = -buf[2];
  85
  86         input_report_rel(atamouse_dev, REL_X, dx);
  87         input_report_rel(atamouse_dev, REL_Y, dy);
  88
  89         input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x1);
  90         input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
  91         input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x4);
  92
  93         input_sync(atamouse_dev);
  94
  95         return;
  96 }
  97
  98 static int atamouse_open(struct input_dev *dev)
  99 {
 100         if (atamouse_used++)
 101                 return 0;
 102
 103 #ifdef FIXED_ATARI_JOYSTICK
 104         atari_mouse_buttons = 0;
 105 #endif
 106         ikbd_mouse_y0_top();
 107         ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
 108         ikbd_mouse_rel_pos();
 109         atari_input_mouse_interrupt_hook = atamouse_interrupt;
 110         return 0;
 111 }
 112
 113 static void atamouse_close(struct input_dev *dev)
 114 {
 115         if (!--atamouse_used) {
 116                 ikbd_mouse_disable();
 117                 atari_mouse_interrupt_hook = NULL;
 118         }
 119 }
 120
 121 static int __init atamouse_init(void)
 122 {
 123         if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
 124                 return -ENODEV;
 125
 126         if (!(atari_keyb_init()))
 127                 return -ENODEV;
 128
 129         atamouse_dev = input_allocate_device();
 130         if (!atamouse_dev)
 131                 return -ENOMEM;
 132
 133         atamouse_dev->name = "Atari mouse";
 134         atamouse_dev->phys = "atamouse/input0";
 135         atamouse_dev->id.bustype = BUS_HOST;
 136         atamouse_dev->id.vendor = 0x0001;
 137         atamouse_dev->id.product = 0x0002;
 138         atamouse_dev->id.version = 0x0100;
 139
 140         atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 141         atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 142         atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 143                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 144         atamouse_dev->open = atamouse_open;
 145         atamouse_dev->close = atamouse_close;
 146
 147         if (input_register_device(atamouse_dev)) {
 148                 input_free_device(atamouse_dev);
 149                 return -ENOMEM;
 150         }
 151
 152         return 0;
 153 }
 154
 155 static void __exit atamouse_exit(void)
 156 {
 157         input_unregister_device(atamouse_dev);
 158 }
 159
 160 module_init(atamouse_init);
 161 module_exit(atamouse_exit);