138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
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/*
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* Amiga mouse driver for Linux/m68k
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*
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* Copyright (c) 2000-2002 Vojtech Pavlik
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*
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* Based on the work of:
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* Michael Rausch James Banks
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* Matther Dillon David Giller
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* Nathan Laredo Linus Torvalds
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* Johan Myreen Jes Sorensen
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* Russell King
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Amiga mouse driver");
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MODULE_LICENSE("GPL");
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static int amimouse_used = 0;
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static int amimouse_lastx, amimouse_lasty;
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static struct input_dev amimouse_dev;
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static char *amimouse_name = "Amiga mouse";
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static char *amimouse_phys = "amimouse/input0";
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static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp)
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{
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unsigned short joy0dat, potgor;
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int nx, ny, dx, dy;
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joy0dat = custom.joy0dat;
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nx = joy0dat & 0xff;
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ny = joy0dat >> 8;
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dx = nx - amimouse_lastx;
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dy = ny - amimouse_lasty;
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if (dx < -127) dx = (256 + nx) - amimouse_lastx;
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if (dx > 127) dx = (nx - 256) - amimouse_lastx;
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if (dy < -127) dy = (256 + ny) - amimouse_lasty;
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if (dy > 127) dy = (ny - 256) - amimouse_lasty;
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amimouse_lastx = nx;
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amimouse_lasty = ny;
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potgor = custom.potgor;
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input_regs(&amimouse_dev, fp);
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input_report_rel(&amimouse_dev, REL_X, dx);
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input_report_rel(&amimouse_dev, REL_Y, dy);
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input_report_key(&amimouse_dev, BTN_LEFT, ciaa.pra & 0x40);
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input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100);
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input_report_key(&amimouse_dev, BTN_RIGHT, potgor & 0x0400);
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input_sync(&amimouse_dev);
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return IRQ_HANDLED;
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}
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static int amimouse_open(struct input_dev *dev)
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{
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unsigned short joy0dat;
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if (amimouse_used++)
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return 0;
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joy0dat = custom.joy0dat;
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amimouse_lastx = joy0dat & 0xff;
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amimouse_lasty = joy0dat >> 8;
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if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) {
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amimouse_used--;
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printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
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return -EBUSY;
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}
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return 0;
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}
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static void amimouse_close(struct input_dev *dev)
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{
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if (!--amimouse_used)
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free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt);
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}
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static int __init amimouse_init(void)
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{
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if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE))
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return -ENODEV;
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amimouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
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amimouse_dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
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amimouse_dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
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amimouse_dev.open = amimouse_open;
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amimouse_dev.close = amimouse_close;
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amimouse_dev.name = amimouse_name;
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amimouse_dev.phys = amimouse_phys;
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amimouse_dev.id.bustype = BUS_AMIGA;
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amimouse_dev.id.vendor = 0x0001;
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amimouse_dev.id.product = 0x0002;
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amimouse_dev.id.version = 0x0100;
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input_register_device(&amimouse_dev);
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printk(KERN_INFO "input: %s at joy0dat\n", amimouse_name);
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return 0;
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}
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static void __exit amimouse_exit(void)
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{
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input_unregister_device(&amimouse_dev);
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}
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module_init(amimouse_init);
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module_exit(amimouse_exit);
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