// SPDX-License-Identifier: GPL-2.0-only/* *  Amiga mouse driver for Linux/m68k * *  Copyright (c) 2000-2002 Vojtech Pavlik * *  Based on the work of: *	Michael Rausch		James Banks *	Matther Dillon		David Giller *	Nathan Laredo		Linus Torvalds *	Johan Myreen		Jes Sorensen *	Russell King */  #include <linux/module.h>#include <linux/init.h>#include <linux/input.h>#include <linux/interrupt.h>#include <linux/platform_device.h> #include <asm/irq.h>#include <asm/setup.h>#include <linux/uaccess.h>#include <asm/amigahw.h>#include <asm/amigaints.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION("Amiga mouse driver");MODULE_LICENSE("GPL"); static int amimouse_lastx, amimouse_lasty; static irqreturn_t amimouse_interrupt(int irq, void *data){	struct input_dev *dev = data;	unsigned short joy0dat, potgor;	int nx, ny, dx, dy; 	joy0dat = amiga_custom.joy0dat; 	nx = joy0dat & 0xff;	ny = joy0dat >> 8; 	dx = nx - amimouse_lastx;	dy = ny - amimouse_lasty; 	if (dx < -127) dx = (256 + nx) - amimouse_lastx;	if (dx >  127) dx = (nx - 256) - amimouse_lastx;	if (dy < -127) dy = (256 + ny) - amimouse_lasty;	if (dy >  127) dy = (ny - 256) - amimouse_lasty; 	amimouse_lastx = nx;	amimouse_lasty = ny; 	potgor = amiga_custom.potgor; 	input_report_rel(dev, REL_X, dx);	input_report_rel(dev, REL_Y, dy); 	input_report_key(dev, BTN_LEFT,   ciaa.pra & 0x40);	input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);	input_report_key(dev, BTN_RIGHT,  potgor & 0x0400); 	input_sync(dev); 	return IRQ_HANDLED;} static int amimouse_open(struct input_dev *dev){	unsigned short joy0dat;	int error; 	joy0dat = amiga_custom.joy0dat; 	amimouse_lastx = joy0dat & 0xff;	amimouse_lasty = joy0dat >> 8; 	error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",			    dev);	if (error)		dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 	return error;} static void amimouse_close(struct input_dev *dev){	free_irq(IRQ_AMIGA_VERTB, dev);} static int __init amimouse_probe(struct platform_device *pdev){	int err;	struct input_dev *dev; 	dev = input_allocate_device();	if (!dev)		return -ENOMEM; 	dev->name = pdev->name;	dev->phys = "amimouse/input0";	dev->id.bustype = BUS_AMIGA;	dev->id.vendor = 0x0001;	dev->id.product = 0x0002;	dev->id.version = 0x0100; 	dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);	dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);	dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);	dev->open = amimouse_open;	dev->close = amimouse_close;	dev->dev.parent = &pdev->dev; 	err = input_register_device(dev);	if (err) {		input_free_device(dev);		return err;	} 	platform_set_drvdata(pdev, dev); 	return 0;} static void __exit amimouse_remove(struct platform_device *pdev){	struct input_dev *dev = platform_get_drvdata(pdev); 	input_unregister_device(dev);} /* * amimouse_remove() lives in .exit.text. For drivers registered via * module_platform_driver_probe() this is ok because they cannot get unbound at * runtime. So mark the driver struct with __refdata to prevent modpost * triggering a section mismatch warning. */static struct platform_driver amimouse_driver __refdata = {	.remove = __exit_p(amimouse_remove),	.driver   = {		.name	= "amiga-mouse",	},}; module_platform_driver_probe(amimouse_driver, amimouse_probe); MODULE_ALIAS("platform:amiga-mouse");