root/include/linux/gpio_mouse.h

/*
 * Driver for simulating a mouse on GPIO lines.
 *
 * Copyright (C) 2007 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _GPIO_MOUSE_H
#define _GPIO_MOUSE_H

#define GPIO_MOUSE_POLARITY_ACT_HIGH    0x00
#define GPIO_MOUSE_POLARITY_ACT_LOW     0x01

#define GPIO_MOUSE_PIN_UP       0
#define GPIO_MOUSE_PIN_DOWN     1
#define GPIO_MOUSE_PIN_LEFT     2
#define GPIO_MOUSE_PIN_RIGHT    3
#define GPIO_MOUSE_PIN_BLEFT    4
#define GPIO_MOUSE_PIN_BMIDDLE  5
#define GPIO_MOUSE_PIN_BRIGHT   6
#define GPIO_MOUSE_PIN_MAX      7

/**
 * struct gpio_mouse_platform_data
 * @scan_ms: integer in ms specifying the scan periode.
 * @polarity: Pin polarity, active high or low.
 * @up: GPIO line for up value.
 * @down: GPIO line for down value.
 * @left: GPIO line for left value.
 * @right: GPIO line for right value.
 * @bleft: GPIO line for left button.
 * @bmiddle: GPIO line for middle button.
 * @bright: GPIO line for right button.
 *
 * This struct must be added to the platform_device in the board code.
 * It is used by the gpio_mouse driver to setup GPIO lines and to
 * calculate mouse movement.
 */
struct gpio_mouse_platform_data {
        int scan_ms;
        int polarity;

        union {
                struct {
                        int up;
                        int down;
                        int left;
                        int right;

                        int bleft;
                        int bmiddle;
                        int bright;
                };
                int pins[GPIO_MOUSE_PIN_MAX];
        };
};

#endif /* _GPIO_MOUSE_H */