cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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atarimouse.c (3705B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  Atari mouse driver for Linux/m68k
      4 *
      5 *  Copyright (c) 2005 Michael Schmitz
      6 *
      7 *  Based on:
      8 *  Amiga mouse driver for Linux/m68k
      9 *
     10 *  Copyright (c) 2000-2002 Vojtech Pavlik
     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#include <linux/module.h>
     39#include <linux/init.h>
     40#include <linux/input.h>
     41#include <linux/interrupt.h>
     42
     43#include <asm/irq.h>
     44#include <asm/setup.h>
     45#include <linux/uaccess.h>
     46#include <asm/atarihw.h>
     47#include <asm/atarikb.h>
     48#include <asm/atariints.h>
     49
     50MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
     51MODULE_DESCRIPTION("Atari mouse driver");
     52MODULE_LICENSE("GPL");
     53
     54static int mouse_threshold[2] = {2, 2};
     55module_param_array(mouse_threshold, int, NULL, 0);
     56
     57#ifdef FIXED_ATARI_JOYSTICK
     58extern int atari_mouse_buttons;
     59#endif
     60
     61static struct input_dev *atamouse_dev;
     62
     63static void atamouse_interrupt(char *buf)
     64{
     65	int buttons, dx, dy;
     66
     67	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
     68#ifdef FIXED_ATARI_JOYSTICK
     69	buttons |= atari_mouse_buttons & 2;
     70	atari_mouse_buttons = buttons;
     71#endif
     72
     73	/* only relative events get here */
     74	dx = buf[1];
     75	dy = buf[2];
     76
     77	input_report_rel(atamouse_dev, REL_X, dx);
     78	input_report_rel(atamouse_dev, REL_Y, dy);
     79
     80	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
     81	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
     82	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
     83
     84	input_sync(atamouse_dev);
     85
     86	return;
     87}
     88
     89static int atamouse_open(struct input_dev *dev)
     90{
     91#ifdef FIXED_ATARI_JOYSTICK
     92	atari_mouse_buttons = 0;
     93#endif
     94	ikbd_mouse_y0_top();
     95	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
     96	ikbd_mouse_rel_pos();
     97	atari_input_mouse_interrupt_hook = atamouse_interrupt;
     98
     99	return 0;
    100}
    101
    102static void atamouse_close(struct input_dev *dev)
    103{
    104	ikbd_mouse_disable();
    105	atari_input_mouse_interrupt_hook = NULL;
    106}
    107
    108static int __init atamouse_init(void)
    109{
    110	int error;
    111
    112	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
    113		return -ENODEV;
    114
    115	error = atari_keyb_init();
    116	if (error)
    117		return error;
    118
    119	atamouse_dev = input_allocate_device();
    120	if (!atamouse_dev)
    121		return -ENOMEM;
    122
    123	atamouse_dev->name = "Atari mouse";
    124	atamouse_dev->phys = "atamouse/input0";
    125	atamouse_dev->id.bustype = BUS_HOST;
    126	atamouse_dev->id.vendor = 0x0001;
    127	atamouse_dev->id.product = 0x0002;
    128	atamouse_dev->id.version = 0x0100;
    129
    130	atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
    131	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
    132	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
    133		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
    134
    135	atamouse_dev->open = atamouse_open;
    136	atamouse_dev->close = atamouse_close;
    137
    138	error = input_register_device(atamouse_dev);
    139	if (error) {
    140		input_free_device(atamouse_dev);
    141		return error;
    142	}
    143
    144	return 0;
    145}
    146
    147static void __exit atamouse_exit(void)
    148{
    149	input_unregister_device(atamouse_dev);
    150}
    151
    152module_init(atamouse_init);
    153module_exit(atamouse_exit);