/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2008 by Mark Arigo * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "system.h" #include "button.h" #include "backlight.h" #include "backlight-target.h" #include "synaptics-mep.h" #define LOGF_ENABLE #include "logf.h" static int int_btn = BUTTON_NONE; #ifndef BOOTLOADER void button_init_device(void) { /* enable touchpad leds */ GPIOA_ENABLE |= BUTTONLIGHT_ALL; GPIOA_OUTPUT_EN |= BUTTONLIGHT_ALL; /* enable touchpad */ GPO32_ENABLE |= 0x40000000; GPO32_VAL &= ~0x40000000; /* enable ACK, CLK, DATA lines */ GPIOD_ENABLE |= (0x1 | 0x2 | 0x4); GPIOD_OUTPUT_EN |= 0x1; /* ACK */ GPIOD_OUTPUT_VAL |= 0x1; /* high */ GPIOD_OUTPUT_EN &= ~0x2; /* CLK */ GPIOD_OUTPUT_EN |= 0x4; /* DATA */ GPIOD_OUTPUT_VAL |= 0x4; /* high */ if (!touchpad_init()) { logf("touchpad not ready"); } } /* * Button interrupt handler */ void button_int(void) { char data[4]; int val; int_btn = BUTTON_NONE; val = touchpad_read_device(data, 4); if (val == MEP_BUTTON_HEADER) { /* Buttons packet - touched one of the 5 "buttons" */ if (data[1] & 0x1) int_btn |= BUTTON_PLAY; if (data[1] & 0x2) int_btn |= BUTTON_MENU; if (data[1] & 0x4) int_btn |= BUTTON_LEFT; if (data[1] & 0x8) int_btn |= BUTTON_DISPLAY; if (data[2] & 0x1) int_btn |= BUTTON_RIGHT; } else if (val == MEP_ABSOLUTE_HEADER) { /* Absolute packet - the finger is on the vertical strip. Position ranges from 1-4095, with 1 at the bottom. */ val = ((data[1] >> 4) << 8) | data[2]; /* position */ if ((val > 0) && (val <= 1365)) int_btn |= BUTTON_DOWN; else if ((val > 1365) && (val <= 2730)) int_btn |= BUTTON_SELECT; else if ((val > 2730) && (val <= 4095)) int_btn |= BUTTON_UP; } } #else void button_init_device(void){} #endif /* bootloader */ /* * Get button pressed from hardware */ int button_read_device(void) { int btn = int_btn; if(button_hold()) return BUTTON_NONE; if (~GPIOA_INPUT_VAL & 0x40) btn |= BUTTON_POWER; return btn; } bool button_hold(void) { return (GPIOD_INPUT_VAL & 0x10) ? false : true; } bool headphones_inserted(void) { return (GPIOD_INPUT_VAL & 0x80) ? false : true; }