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/drivers/input/mouse/atarimouse.c

https://bitbucket.org/ndreys/linux-sunxi
C | 159 lines | 90 code | 29 blank | 40 comment | 5 complexity | 93b16151ef4113bab3f383bef07a5e21 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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
 56MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
 57MODULE_DESCRIPTION("Atari mouse driver");
 58MODULE_LICENSE("GPL");
 59
 60static int mouse_threshold[2] = {2, 2};
 61module_param_array(mouse_threshold, int, NULL, 0);
 62
 63#ifdef FIXED_ATARI_JOYSTICK
 64extern int atari_mouse_buttons;
 65#endif
 66
 67static struct input_dev *atamouse_dev;
 68
 69static void atamouse_interrupt(char *buf)
 70{
 71	int buttons, dx, dy;
 72
 73	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
 74#ifdef FIXED_ATARI_JOYSTICK
 75	buttons |= atari_mouse_buttons & 2;
 76	atari_mouse_buttons = buttons;
 77#endif
 78
 79	/* only relative events get here */
 80	dx = buf[1];
 81	dy = buf[2];
 82
 83	input_report_rel(atamouse_dev, REL_X, dx);
 84	input_report_rel(atamouse_dev, REL_Y, dy);
 85
 86	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
 87	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
 88	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
 89
 90	input_sync(atamouse_dev);
 91
 92	return;
 93}
 94
 95static int atamouse_open(struct input_dev *dev)
 96{
 97#ifdef FIXED_ATARI_JOYSTICK
 98	atari_mouse_buttons = 0;
 99#endif
100	ikbd_mouse_y0_top();
101	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
102	ikbd_mouse_rel_pos();
103	atari_input_mouse_interrupt_hook = atamouse_interrupt;
104
105	return 0;
106}
107
108static void atamouse_close(struct input_dev *dev)
109{
110	ikbd_mouse_disable();
111	atari_input_mouse_interrupt_hook = NULL;
112}
113
114static int __init atamouse_init(void)
115{
116	int error;
117
118	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
119		return -ENODEV;
120
121	error = atari_keyb_init();
122	if (error)
123		return error;
124
125	atamouse_dev = input_allocate_device();
126	if (!atamouse_dev)
127		return -ENOMEM;
128
129	atamouse_dev->name = "Atari mouse";
130	atamouse_dev->phys = "atamouse/input0";
131	atamouse_dev->id.bustype = BUS_HOST;
132	atamouse_dev->id.vendor = 0x0001;
133	atamouse_dev->id.product = 0x0002;
134	atamouse_dev->id.version = 0x0100;
135
136	atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
137	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
138	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
139		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
140
141	atamouse_dev->open = atamouse_open;
142	atamouse_dev->close = atamouse_close;
143
144	error = input_register_device(atamouse_dev);
145	if (error) {
146		input_free_device(atamouse_dev);
147		return error;
148	}
149
150	return 0;
151}
152
153static void __exit atamouse_exit(void)
154{
155	input_unregister_device(atamouse_dev);
156}
157
158module_init(atamouse_init);
159module_exit(atamouse_exit);