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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
170 lines
4.2 KiB
C
170 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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*
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* Based on the work of:
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* James Banks Matthew Dillon
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* David Giller Nathan Laredo
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* Linus Torvalds Johan Myreen
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* Cliff Matthews Philip Blundell
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* Russell King
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*/
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/*
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* Logitech Bus Mouse Driver for Linux
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*/
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/*
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/ioport.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/io.h>
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#include <asm/irq.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Logitech busmouse driver");
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MODULE_LICENSE("GPL");
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#define LOGIBM_BASE 0x23c
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#define LOGIBM_EXTENT 4
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#define LOGIBM_DATA_PORT LOGIBM_BASE + 0
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#define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1
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#define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2
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#define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3
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#define LOGIBM_ENABLE_IRQ 0x00
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#define LOGIBM_DISABLE_IRQ 0x10
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#define LOGIBM_READ_X_LOW 0x80
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#define LOGIBM_READ_X_HIGH 0xa0
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#define LOGIBM_READ_Y_LOW 0xc0
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#define LOGIBM_READ_Y_HIGH 0xe0
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#define LOGIBM_DEFAULT_MODE 0x90
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#define LOGIBM_CONFIG_BYTE 0x91
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#define LOGIBM_SIGNATURE_BYTE 0xa5
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#define LOGIBM_IRQ 5
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static int logibm_irq = LOGIBM_IRQ;
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module_param_hw_named(irq, logibm_irq, uint, irq, 0);
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MODULE_PARM_DESC(irq, "IRQ number (5=default)");
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static struct input_dev *logibm_dev;
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static irqreturn_t logibm_interrupt(int irq, void *dev_id)
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{
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char dx, dy;
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unsigned char buttons;
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outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT);
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dx = (inb(LOGIBM_DATA_PORT) & 0xf);
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outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT);
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dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4;
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outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT);
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dy = (inb(LOGIBM_DATA_PORT) & 0xf);
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outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT);
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buttons = inb(LOGIBM_DATA_PORT);
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dy |= (buttons & 0xf) << 4;
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buttons = ~buttons >> 5;
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input_report_rel(logibm_dev, REL_X, dx);
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input_report_rel(logibm_dev, REL_Y, dy);
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input_report_key(logibm_dev, BTN_RIGHT, buttons & 1);
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input_report_key(logibm_dev, BTN_MIDDLE, buttons & 2);
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input_report_key(logibm_dev, BTN_LEFT, buttons & 4);
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input_sync(logibm_dev);
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outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
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return IRQ_HANDLED;
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}
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static int logibm_open(struct input_dev *dev)
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{
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if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) {
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printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq);
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return -EBUSY;
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}
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outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
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return 0;
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}
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static void logibm_close(struct input_dev *dev)
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{
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outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
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free_irq(logibm_irq, NULL);
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}
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static int __init logibm_init(void)
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{
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int err;
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if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) {
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printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE);
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return -EBUSY;
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}
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outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT);
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outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT);
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udelay(100);
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if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) {
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printk(KERN_INFO "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE);
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err = -ENODEV;
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goto err_release_region;
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}
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outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT);
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outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
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logibm_dev = input_allocate_device();
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if (!logibm_dev) {
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printk(KERN_ERR "logibm.c: Not enough memory for input device\n");
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err = -ENOMEM;
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goto err_release_region;
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}
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logibm_dev->name = "Logitech bus mouse";
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logibm_dev->phys = "isa023c/input0";
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logibm_dev->id.bustype = BUS_ISA;
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logibm_dev->id.vendor = 0x0003;
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logibm_dev->id.product = 0x0001;
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logibm_dev->id.version = 0x0100;
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logibm_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
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logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
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logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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logibm_dev->open = logibm_open;
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logibm_dev->close = logibm_close;
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err = input_register_device(logibm_dev);
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if (err)
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goto err_free_dev;
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return 0;
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err_free_dev:
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input_free_device(logibm_dev);
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err_release_region:
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release_region(LOGIBM_BASE, LOGIBM_EXTENT);
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return err;
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}
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static void __exit logibm_exit(void)
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{
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input_unregister_device(logibm_dev);
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release_region(LOGIBM_BASE, LOGIBM_EXTENT);
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}
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module_init(logibm_init);
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module_exit(logibm_exit);
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