firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007, 2009 by Karl Kurbjun
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include "cpu.h"
  24 #include "system.h"
  25 #include "button.h"
  26 #include "kernel.h"
  27 #include "backlight.h"
  28 #include "backlight-target.h"
  29 #include "lcd-remote-target.h"
  30 #include "uart-target.h"
  31 #include "tsc2100.h"
  32 #include "string.h"
  33 #include "touchscreen.h"
  34
  35 static bool hold_button     = false;
  36
  37 static struct touch_calibration_point topleft, bottomright;
  38
  39 /* Jd's tests.. These will hopefully work for everyone so we dont have to
  40  *  create a calibration screen.
  41  *  Portait:
  42  *      (0,0) = 200, 3900
  43  *      (480,640) = 3880, 270
  44  *  Landscape:
  45  *      (0,0) = 200, 270
  46  *      (640,480) = 3880, 3900
  47 */
  48
  49 static int touch_to_pixels(short *val_x, short *val_y)
  50 {
  51     short x,y;
  52
  53 #if CONFIG_ORIENTATION == SCREEN_PORTRAIT
  54     x=*val_x;
  55     y=*val_y;
  56 #else
  57     x=*val_y;
  58     y=*val_x;
  59 #endif
  60
  61     x = (x-topleft.val_x)*(bottomright.px_x - topleft.px_x) / (bottomright.val_x - topleft.val_x) + topleft.px_x;
  62     y = (y-topleft.val_y)*(bottomright.px_y - topleft.px_y) / (bottomright.val_y - topleft.val_y) + topleft.px_y;
  63
  64     if (x < 0)
  65         x = 0;
  66     else if (x>=LCD_WIDTH)
  67         x=LCD_WIDTH-1;
  68
  69     if (y < 0)
  70         y = 0;
  71     else if (y>=LCD_HEIGHT)
  72         y=LCD_HEIGHT-1;
  73
  74     *val_x=x;
  75     *val_y=y;
  76
  77     return (x<<16)|y;
  78 }
  79
  80 void button_init_device(void)
  81 {
  82     /* GIO is the power button, set as input */
  83     IO_GIO_DIR0 |= 0x01;
  84
  85 #if CONFIG_ORIENTATION == SCREEN_PORTRAIT
  86     topleft.val_x = 200;
  87     topleft.val_y = 3900;
  88
  89     bottomright.val_x = 3880;
  90     bottomright.val_y = 270;
  91 #else
  92     topleft.val_x = 270;
  93     topleft.val_y = 200;
  94
  95     bottomright.val_x = 3900;
  96     bottomright.val_y = 3880;
  97 #endif
  98
  99     topleft.px_x = 0;
 100     topleft.px_y = 0;
 101
 102     bottomright.px_x = LCD_WIDTH;
 103     bottomright.px_y = LCD_HEIGHT;
 104 }
 105
 106 inline bool button_hold(void)
 107 {
 108     return hold_button;
 109 }
 110
 111 /* Since this is a touchscreen, the expectation in higher levels is that the
 112  *  previous touch location is maintained when a release occurs.  This is
 113  *  intended to mimic a mouse or other similar pointing device.
 114  */
 115 int button_read_device(int *data)
 116 {
 117     static int old_data = 0;
 118     int button_read = BUTTON_NONE;
 119     short touch_x, touch_y, touch_z1, touch_z2;
 120     static bool hold_button_old = false;
 121
 122     *data = old_data;
 123
 124     /* Handle touchscreen */
 125     if (tsc2100_read_touch(&touch_x, &touch_y, &touch_z1, &touch_z2))
 126     {
 127         old_data = *data = touch_to_pixels(&touch_x, &touch_y);
 128         button_read |= touchscreen_to_pixels(touch_x, touch_y, data);
 129     }
 130
 131     tsc2100_set_mode(true, 0x01);
 132
 133     /* Handle power button */
 134     if ((IO_GIO_BITSET0&0x01) == 0) {
 135         button_read |=  BUTTON_POWER;
 136     }
 137
 138 #if defined(HAVE_REMOTE_LCD)
 139     /* Read data from the remote */
 140     button_read |= remote_read_device();
 141     hold_button=remote_button_hold();
 142 #endif
 143
 144     /* Take care of hold notifications */
 145 #ifndef BOOTLOADER
 146     /* give BL notice if HB state chaged */
 147     if (hold_button != hold_button_old) {
 148         backlight_hold_changed(hold_button);
 149         hold_button_old=hold_button;
 150     }
 151 #endif
 152
 153     if (hold_button)
 154     {
 155         button_read = BUTTON_NONE;
 156     }
 157
 158     return button_read;
 159 }
 160