linux-imx

/*

 *  Copyright (c) 1999-2001 Vojtech Pavlik

 */

​

/*

 *  Serial mouse 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/delay.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/input.h>

#include <linux/serio.h>

​

#define DRIVER_DESC "Serial mouse driver"

​

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE("GPL");

​

static const char *sermouse_protocols[] = { "None", "Mouse Systems Mouse", "Sun Mouse", "Microsoft Mouse",

                    "Logitech M+ Mouse", "Microsoft MZ Mouse", "Logitech MZ+ Mouse",

                    "Logitech MZ++ Mouse"};

​

struct sermouse {

    struct input_dev *dev;

    signed char buf[8];

    unsigned char count;

    unsigned char type;

    unsigned long last;

    char phys[32];

};

​

/*

 * sermouse_process_msc() analyzes the incoming MSC/Sun bytestream and

 * applies some prediction to the data, resulting in 96 updates per

 * second, which is as good as a PS/2 or USB mouse.

 */

​

static void sermouse_process_msc(struct sermouse *sermouse, signed char data)

{

    struct input_dev *dev = sermouse->dev;

    signed char *buf = sermouse->buf;

​

    switch (sermouse->count) {

​

        case 0:

            if ((data & 0xf8) != 0x80)

                return;

            input_report_key(dev, BTN_LEFT,   !(data & 4));

            input_report_key(dev, BTN_RIGHT,  !(data & 1));

            input_report_key(dev, BTN_MIDDLE, !(data & 2));

            break;

​

        case 1:

        case 3:

            input_report_rel(dev, REL_X, data / 2);

            input_report_rel(dev, REL_Y, -buf[1]);

            buf[0] = data - data / 2;

            break;

​

        case 2:

        case 4:

            input_report_rel(dev, REL_X, buf[0]);

            input_report_rel(dev, REL_Y, buf[1] - data);

            buf[1] = data / 2;

            break;

    }

​

    input_sync(dev);

​

    if (++sermouse->count == 5)

        sermouse->count = 0;

}

​