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/*
* 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_used = 0;
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;
if (amimouse_used++)
return 0;
joy0dat = custom.joy0dat;
amimouse_lastx = joy0dat & 0xff;
amimouse_lasty = joy0dat >> 8;
if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) {
amimouse_used--;
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)
{
if (!--amimouse_used)
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);
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