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 /* this file also handles the touch screen driver interface */
  23
  24 #include "config.h"
  25 #include "cpu.h"
  26 #include "system.h"
  27 #include "button.h"
  28 #include "kernel.h"
  29 #include "backlight.h"
  30 #include "backlight-target.h"
  31 #include "lcd-remote-target.h"
  32 #include "uart-target.h"
  33 #include "tsc2100.h"
  34 #include "string.h"
  35 #include "touchscreen.h"
  36
  37 static bool touch_available = false;
  38 static bool hold_button     = false;
  39
  40 static short touch_x, touch_y, touch_z1, touch_z2;
  41 static long last_touch = 0;
  42
  43 static struct touch_calibration_point topleft, bottomright;
  44
  45 /* Jd's tests.. These will hopefully work for everyone so we dont have to
  46  *  create a calibration screen.
  47  *  Portait:
  48  *      (0,0) = 200, 3900
  49  *      (480,640) = 3880, 270
  50  *  Landscape:
  51  *      (0,0) = 200, 270
  52  *      (640,480) = 3880, 3900
  53 */
  54
  55 static int touch_to_pixels(short *val_x, short *val_y)
  56 {
  57     short x,y;
  58
  59 #if CONFIG_ORIENTATION == SCREEN_PORTRAIT
  60     x=*val_x;
  61     y=*val_y;
  62 #else
  63     x=*val_y;
  64     y=*val_x;
  65 #endif
  66
  67     x = (x-topleft.val_x)*(bottomright.px_x - topleft.px_x) / (bottomright.val_x - topleft.val_x) + topleft.px_x;
  68     y = (y-topleft.val_y)*(bottomright.px_y - topleft.px_y) / (bottomright.val_y - topleft.val_y) + topleft.px_y;
  69
  70     if (x < 0)
  71         x = 0;
  72     else if (x>=LCD_WIDTH)
  73         x=LCD_WIDTH-1;
  74
  75     if (y < 0)
  76         y = 0;
  77     else if (y>=LCD_HEIGHT)
  78         y=LCD_HEIGHT-1;
  79
  80     *val_x=x;
  81     *val_y=y;
  82
  83     return (x<<16)|y;
  84 }
  85
  86 void button_init_device(void)
  87 {
  88     touch_available = false;
  89     /* GIO is the power button, set as input */
  90     IO_GIO_DIR0 |= 0x01;
  91
  92 #if CONFIG_ORIENTATION == SCREEN_PORTRAIT
  93     topleft.val_x = 200;
  94     topleft.val_y = 3900;
  95
  96     bottomright.val_x = 3880;
  97     bottomright.val_y = 270;
  98 #else
  99     topleft.val_x = 270;
 100     topleft.val_y = 200;
 101
 102     bottomright.val_x = 3900;
 103     bottomright.val_y = 3880;
 104 #endif
 105
 106     topleft.px_x = 0;
 107     topleft.px_y = 0;
 108
 109     bottomright.px_x = LCD_WIDTH;
 110     bottomright.px_y = LCD_HEIGHT;
 111 }
 112
 113 inline bool button_hold(void)
 114 {
 115     return hold_button;
 116 }
 117
 118 /* This is called from the tsc2100 interupt handler in adc-mr500.c */
 119 void touch_read_coord(void)
 120 {
 121     touch_available = true;
 122     tsc2100_read_touch(&touch_x, &touch_y, &touch_z1, &touch_z2);
 123 }
 124
 125 int button_read_device(int *data)
 126 {
 127     int button_read = BUTTON_NONE;
 128     static bool hold_button_old = false;
 129
 130     *data = 0;
 131
 132     /* Handle touchscreen */
 133     if (touch_available)
 134     {
 135         *data = touch_to_pixels(&touch_x, &touch_y);
 136         button_read |= touchscreen_to_pixels(touch_x, touch_y, data);
 137
 138         touch_available = false;
 139         last_touch=current_tick;
 140     }
 141
 142     /* Handle power button */
 143     if ((IO_GIO_BITSET0&0x01) == 0)
 144     {
 145         button_read |=  BUTTON_POWER;
 146     }
 147
 148     /* Read data from the remote */
 149     button_read |= remote_read_device();
 150     hold_button=remote_button_hold();
 151
 152     /* Take care of hold notifications */
 153 #ifndef BOOTLOADER
 154     /* give BL notice if HB state chaged */
 155     if (hold_button != hold_button_old)
 156     {
 157         backlight_hold_changed(hold_button);
 158         hold_button_old=hold_button;
 159     }
 160 #endif
 161
 162     if (hold_button)
 163     {
 164         button_read = BUTTON_NONE;
 165     }
 166
 167     return button_read;
 168 }
 169