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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amimouse.c (3192B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  Amiga mouse driver for Linux/m68k
      4 *
      5 *  Copyright (c) 2000-2002 Vojtech Pavlik
      6 *
      7 *  Based on the work of:
      8 *	Michael Rausch		James Banks
      9 *	Matther Dillon		David Giller
     10 *	Nathan Laredo		Linus Torvalds
     11 *	Johan Myreen		Jes Sorensen
     12 *	Russell King
     13 */
     14
     15
     16#include <linux/module.h>
     17#include <linux/init.h>
     18#include <linux/input.h>
     19#include <linux/interrupt.h>
     20#include <linux/platform_device.h>
     21
     22#include <asm/irq.h>
     23#include <asm/setup.h>
     24#include <linux/uaccess.h>
     25#include <asm/amigahw.h>
     26#include <asm/amigaints.h>
     27
     28MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
     29MODULE_DESCRIPTION("Amiga mouse driver");
     30MODULE_LICENSE("GPL");
     31
     32static int amimouse_lastx, amimouse_lasty;
     33
     34static irqreturn_t amimouse_interrupt(int irq, void *data)
     35{
     36	struct input_dev *dev = data;
     37	unsigned short joy0dat, potgor;
     38	int nx, ny, dx, dy;
     39
     40	joy0dat = amiga_custom.joy0dat;
     41
     42	nx = joy0dat & 0xff;
     43	ny = joy0dat >> 8;
     44
     45	dx = nx - amimouse_lastx;
     46	dy = ny - amimouse_lasty;
     47
     48	if (dx < -127) dx = (256 + nx) - amimouse_lastx;
     49	if (dx >  127) dx = (nx - 256) - amimouse_lastx;
     50	if (dy < -127) dy = (256 + ny) - amimouse_lasty;
     51	if (dy >  127) dy = (ny - 256) - amimouse_lasty;
     52
     53	amimouse_lastx = nx;
     54	amimouse_lasty = ny;
     55
     56	potgor = amiga_custom.potgor;
     57
     58	input_report_rel(dev, REL_X, dx);
     59	input_report_rel(dev, REL_Y, dy);
     60
     61	input_report_key(dev, BTN_LEFT,   ciaa.pra & 0x40);
     62	input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
     63	input_report_key(dev, BTN_RIGHT,  potgor & 0x0400);
     64
     65	input_sync(dev);
     66
     67	return IRQ_HANDLED;
     68}
     69
     70static int amimouse_open(struct input_dev *dev)
     71{
     72	unsigned short joy0dat;
     73	int error;
     74
     75	joy0dat = amiga_custom.joy0dat;
     76
     77	amimouse_lastx = joy0dat & 0xff;
     78	amimouse_lasty = joy0dat >> 8;
     79
     80	error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
     81			    dev);
     82	if (error)
     83		dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
     84
     85	return error;
     86}
     87
     88static void amimouse_close(struct input_dev *dev)
     89{
     90	free_irq(IRQ_AMIGA_VERTB, dev);
     91}
     92
     93static int __init amimouse_probe(struct platform_device *pdev)
     94{
     95	int err;
     96	struct input_dev *dev;
     97
     98	dev = input_allocate_device();
     99	if (!dev)
    100		return -ENOMEM;
    101
    102	dev->name = pdev->name;
    103	dev->phys = "amimouse/input0";
    104	dev->id.bustype = BUS_AMIGA;
    105	dev->id.vendor = 0x0001;
    106	dev->id.product = 0x0002;
    107	dev->id.version = 0x0100;
    108
    109	dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
    110	dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
    111	dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
    112		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
    113	dev->open = amimouse_open;
    114	dev->close = amimouse_close;
    115	dev->dev.parent = &pdev->dev;
    116
    117	err = input_register_device(dev);
    118	if (err) {
    119		input_free_device(dev);
    120		return err;
    121	}
    122
    123	platform_set_drvdata(pdev, dev);
    124
    125	return 0;
    126}
    127
    128static int __exit amimouse_remove(struct platform_device *pdev)
    129{
    130	struct input_dev *dev = platform_get_drvdata(pdev);
    131
    132	input_unregister_device(dev);
    133	return 0;
    134}
    135
    136static struct platform_driver amimouse_driver = {
    137	.remove = __exit_p(amimouse_remove),
    138	.driver   = {
    139		.name	= "amiga-mouse",
    140	},
    141};
    142
    143module_platform_driver_probe(amimouse_driver, amimouse_probe);
    144
    145MODULE_ALIAS("platform:amiga-mouse");