include/linux/gpio_mouse.h

   1 /*
   2  * Driver for simulating a mouse on GPIO lines.
   3  *
   4  * Copyright (C) 2007 Atmel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _GPIO_MOUSE_H
  12 #define _GPIO_MOUSE_H
  13
  14 #define GPIO_MOUSE_POLARITY_ACT_HIGH    0x00
  15 #define GPIO_MOUSE_POLARITY_ACT_LOW     0x01
  16
  17 #define GPIO_MOUSE_PIN_UP       0
  18 #define GPIO_MOUSE_PIN_DOWN     1
  19 #define GPIO_MOUSE_PIN_LEFT     2
  20 #define GPIO_MOUSE_PIN_RIGHT    3
  21 #define GPIO_MOUSE_PIN_BLEFT    4
  22 #define GPIO_MOUSE_PIN_BMIDDLE  5
  23 #define GPIO_MOUSE_PIN_BRIGHT   6
  24 #define GPIO_MOUSE_PIN_MAX      7
  25
  26 /**
  27  * struct gpio_mouse_platform_data
  28  * @scan_ms: integer in ms specifying the scan periode.
  29  * @polarity: Pin polarity, active high or low.
  30  * @up: GPIO line for up value.
  31  * @down: GPIO line for down value.
  32  * @left: GPIO line for left value.
  33  * @right: GPIO line for right value.
  34  * @bleft: GPIO line for left button.
  35  * @bmiddle: GPIO line for middle button.
  36  * @bright: GPIO line for right button.
  37  *
  38  * This struct must be added to the platform_device in the board code.
  39  * It is used by the gpio_mouse driver to setup GPIO lines and to
  40  * calculate mouse movement.
  41  */
  42 struct gpio_mouse_platform_data {
  43         int scan_ms;
  44         int polarity;
  45
  46         union {
  47                 struct {
  48                         int up;
  49                         int down;
  50                         int left;
  51                         int right;
  52
  53                         int bleft;
  54                         int bmiddle;
  55                         int bright;
  56                 };
  57                 int pins[GPIO_MOUSE_PIN_MAX];
  58         };
  59 };
  60
  61 #endif /* _GPIO_MOUSE_H */