linux-imx

/*

 *  Copyright (c) 2000-2001 Vojtech Pavlik

 *

 *  Based on the work of:

 *  Alan Cox    Robin O'Leary

 */

​

/*

 * IBM PC110 touchpad driver for Linux

 */

​

/*

 * 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

 */

​

#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);