linux/drivers/input/mouse/pc110pad.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
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>
2019-05-30 11:26:35 -07:00

164 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000-2001 Vojtech Pavlik
*
* Based on the work of:
* Alan Cox Robin O'Leary
*/
/*
* IBM PC110 touchpad driver for Linux
*/
/*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("IBM PC110 touchpad driver");
MODULE_LICENSE("GPL");
#define PC110PAD_OFF 0x30
#define PC110PAD_ON 0x38
static int pc110pad_irq = 10;
static int pc110pad_io = 0x15e0;
static struct input_dev *pc110pad_dev;
static int pc110pad_data[3];
static int pc110pad_count;
static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
{
int value = inb_p(pc110pad_io);
int handshake = inb_p(pc110pad_io + 2);
outb(handshake | 1, pc110pad_io + 2);
udelay(2);
outb(handshake & ~1, pc110pad_io + 2);
udelay(2);
inb_p(0x64);
pc110pad_data[pc110pad_count++] = value;
if (pc110pad_count < 3)
return IRQ_HANDLED;
input_report_key(pc110pad_dev, BTN_TOUCH,
pc110pad_data[0] & 0x01);
input_report_abs(pc110pad_dev, ABS_X,
pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
input_report_abs(pc110pad_dev, ABS_Y,
pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
input_sync(pc110pad_dev);
pc110pad_count = 0;
return IRQ_HANDLED;
}
static void pc110pad_close(struct input_dev *dev)
{
outb(PC110PAD_OFF, pc110pad_io + 2);
}
static int pc110pad_open(struct input_dev *dev)
{
pc110pad_interrupt(0, NULL);
pc110pad_interrupt(0, NULL);
pc110pad_interrupt(0, NULL);
outb(PC110PAD_ON, pc110pad_io + 2);
pc110pad_count = 0;
return 0;
}
/*
* We try to avoid enabling the hardware if it's not
* there, but we don't know how to test. But we do know
* that the PC110 is not a PCI system. So if we find any
* PCI devices in the machine, we don't have a PC110.
*/
static int __init pc110pad_init(void)
{
int err;
if (!no_pci_devices())
return -ENODEV;
if (!request_region(pc110pad_io, 4, "pc110pad")) {
printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
pc110pad_io, pc110pad_io + 4);
return -EBUSY;
}
outb(PC110PAD_OFF, pc110pad_io + 2);
if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
err = -EBUSY;
goto err_release_region;
}
pc110pad_dev = input_allocate_device();
if (!pc110pad_dev) {
printk(KERN_ERR "pc110pad: Not enough memory.\n");
err = -ENOMEM;
goto err_free_irq;
}
pc110pad_dev->name = "IBM PC110 TouchPad";
pc110pad_dev->phys = "isa15e0/input0";
pc110pad_dev->id.bustype = BUS_ISA;
pc110pad_dev->id.vendor = 0x0003;
pc110pad_dev->id.product = 0x0001;
pc110pad_dev->id.version = 0x0100;
pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
pc110pad_dev->open = pc110pad_open;
pc110pad_dev->close = pc110pad_close;
err = input_register_device(pc110pad_dev);
if (err)
goto err_free_dev;
return 0;
err_free_dev:
input_free_device(pc110pad_dev);
err_free_irq:
free_irq(pc110pad_irq, NULL);
err_release_region:
release_region(pc110pad_io, 4);
return err;
}
static void __exit pc110pad_exit(void)
{
outb(PC110PAD_OFF, pc110pad_io + 2);
free_irq(pc110pad_irq, NULL);
input_unregister_device(pc110pad_dev);
release_region(pc110pad_io, 4);
}
module_init(pc110pad_init);
module_exit(pc110pad_exit);