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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>
163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2000-2001 Vojtech Pavlik
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*
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* Based on the work of:
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* Alan Cox Robin O'Leary
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*/
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/*
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* IBM PC110 touchpad 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/kernel.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/input.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/delay.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("IBM PC110 touchpad driver");
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MODULE_LICENSE("GPL");
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#define PC110PAD_OFF 0x30
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#define PC110PAD_ON 0x38
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static int pc110pad_irq = 10;
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static int pc110pad_io = 0x15e0;
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static struct input_dev *pc110pad_dev;
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static int pc110pad_data[3];
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static int pc110pad_count;
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static irqreturn_t pc110pad_interrupt(int irq, void *ptr)
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{
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int value = inb_p(pc110pad_io);
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int handshake = inb_p(pc110pad_io + 2);
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outb(handshake | 1, pc110pad_io + 2);
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udelay(2);
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outb(handshake & ~1, pc110pad_io + 2);
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udelay(2);
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inb_p(0x64);
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pc110pad_data[pc110pad_count++] = value;
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if (pc110pad_count < 3)
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return IRQ_HANDLED;
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input_report_key(pc110pad_dev, BTN_TOUCH,
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pc110pad_data[0] & 0x01);
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input_report_abs(pc110pad_dev, ABS_X,
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pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100));
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input_report_abs(pc110pad_dev, ABS_Y,
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pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80));
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input_sync(pc110pad_dev);
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pc110pad_count = 0;
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return IRQ_HANDLED;
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}
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static void pc110pad_close(struct input_dev *dev)
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{
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outb(PC110PAD_OFF, pc110pad_io + 2);
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}
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static int pc110pad_open(struct input_dev *dev)
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{
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pc110pad_interrupt(0, NULL);
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pc110pad_interrupt(0, NULL);
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pc110pad_interrupt(0, NULL);
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outb(PC110PAD_ON, pc110pad_io + 2);
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pc110pad_count = 0;
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return 0;
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}
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/*
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* We try to avoid enabling the hardware if it's not
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* there, but we don't know how to test. But we do know
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* that the PC110 is not a PCI system. So if we find any
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* PCI devices in the machine, we don't have a PC110.
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*/
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static int __init pc110pad_init(void)
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{
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int err;
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if (!no_pci_devices())
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return -ENODEV;
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if (!request_region(pc110pad_io, 4, "pc110pad")) {
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printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n",
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pc110pad_io, pc110pad_io + 4);
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return -EBUSY;
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}
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outb(PC110PAD_OFF, pc110pad_io + 2);
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if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) {
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printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq);
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err = -EBUSY;
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goto err_release_region;
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}
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pc110pad_dev = input_allocate_device();
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if (!pc110pad_dev) {
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printk(KERN_ERR "pc110pad: Not enough memory.\n");
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err = -ENOMEM;
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goto err_free_irq;
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}
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pc110pad_dev->name = "IBM PC110 TouchPad";
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pc110pad_dev->phys = "isa15e0/input0";
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pc110pad_dev->id.bustype = BUS_ISA;
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pc110pad_dev->id.vendor = 0x0003;
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pc110pad_dev->id.product = 0x0001;
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pc110pad_dev->id.version = 0x0100;
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pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
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pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff);
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input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff);
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pc110pad_dev->open = pc110pad_open;
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pc110pad_dev->close = pc110pad_close;
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err = input_register_device(pc110pad_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(pc110pad_dev);
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err_free_irq:
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free_irq(pc110pad_irq, NULL);
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err_release_region:
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release_region(pc110pad_io, 4);
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return err;
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}
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static void __exit pc110pad_exit(void)
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{
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outb(PC110PAD_OFF, pc110pad_io + 2);
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free_irq(pc110pad_irq, NULL);
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input_unregister_device(pc110pad_dev);
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release_region(pc110pad_io, 4);
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}
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module_init(pc110pad_init);
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module_exit(pc110pad_exit);
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