/* *  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 *//* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation */#include <linux/module.h>#include <linux/init.h>#include <linux/input.h>#include <linux/interrupt.h>#include <asm/irq.h>#include <asm/setup.h>#include <asm/system.h>#include <asm/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 struct input_dev amimouse_dev;static char *amimouse_name = "Amiga mouse";static char *amimouse_phys = "amimouse/input0";static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp){	unsigned short joy0dat, potgor;	int nx, ny, dx, dy;	joy0dat = 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 = custom.potgor;	input_regs(&amimouse_dev, fp);	input_report_rel(&amimouse_dev, REL_X, dx);	input_report_rel(&amimouse_dev, REL_Y, dy);	input_report_key(&amimouse_dev, BTN_LEFT,   ciaa.pra & 0x40);	input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100);	input_report_key(&amimouse_dev, BTN_RIGHT,  potgor & 0x0400);	input_sync(&amimouse_dev);	return IRQ_HANDLED;}static int amimouse_open(struct input_dev *dev){	unsigned short joy0dat;	joy0dat = custom.joy0dat;	amimouse_lastx = joy0dat & 0xff;	amimouse_lasty = joy0dat >> 8;	if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) {                printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);                return -EBUSY;        }        return 0;}static void amimouse_close(struct input_dev *dev){	free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt);}static int __init amimouse_init(void){	if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE))		return -ENODEV;	amimouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);	amimouse_dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);	amimouse_dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);	amimouse_dev.open = amimouse_open;	amimouse_dev.close = amimouse_close;	amimouse_dev.name = amimouse_name;	amimouse_dev.phys = amimouse_phys;	amimouse_dev.id.bustype = BUS_AMIGA;	amimouse_dev.id.vendor = 0x0001;	amimouse_dev.id.product = 0x0002;	amimouse_dev.id.version = 0x0100;	input_register_device(&amimouse_dev);        printk(KERN_INFO "input: %s at joy0dat\n", amimouse_name);	return 0;}static void __exit amimouse_exit(void){        input_unregister_device(&amimouse_dev);}module_init(amimouse_init);module_exit(amimouse_exit);