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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 <linux/platform_device.h>
- #include <asm/irq.h>
- #include <asm/setup.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 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 int __exit amimouse_remove(struct platform_device *pdev)
- {
- struct input_dev *dev = platform_get_drvdata(pdev);
- input_unregister_device(dev);
- return 0;
- }
- static struct platform_driver amimouse_driver = {
- .remove = __exit_p(amimouse_remove),
- .driver = {
- .name = "amiga-mouse",
- },
- };
- module_platform_driver_probe(amimouse_driver, amimouse_probe);
- MODULE_ALIAS("platform:amiga-mouse");
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