160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Mark Arigo
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "button.h"
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#include "backlight.h"
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#include "synaptics-mep.h"
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/*#define LOGF_ENABLE*/
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#include "logf.h"
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static int int_btn = BUTTON_NONE;
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#ifndef BOOTLOADER
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static bool hold_button_old = false;
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/* Capacitive buttons - lowest setting is still very sensitive */
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static const signed char button_sensitivity = -8; /* -8 to 7 */
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/* Strip - decent amount of contact needed */
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static const signed char strip_sensitivity = 0; /* -8 to 7 */
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static const unsigned char strip_pressure = 25; /* 0 to 255 */
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void button_init_device(void)
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{
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/* The touchpad is powered on and initialized in power-sa9200.c
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since it needs to be ready for both buttons and button lights. */
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/* perform button-specific inits here */
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/* Besides $00, only common parameters $20 and $21 are supported */
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/* Report modes:
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* [15:12] cap btn sens : xxxx,
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* [11: 8] pos sen sens : xxxx,
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* [ 7: 6] rate: 10 (40 rps),
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* [ 5] no filter: 0,
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* [ 4] reserved: 0,
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* [ 3] en scr: 0,
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* [ 2] en btns: 1,
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* [ 1] en rel: 0,
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* [ 0] en abs: 1 */
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touchpad_set_parameter(0, 0x20,
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((button_sensitivity & 0xf) << 12) |
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((strip_sensitivity & 0xf) << 8) |
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(0x2 << 6) |
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(0x1 << 2) |
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(0x1 << 0));
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/* Enhanced operating configuration:
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* [15: 9] reserved : 0000000
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* [ 8] Min abs reporting : 0
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* [ 7] reserved : 0
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* [ 6] not all cap btns : 1
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* [ 5] single cap btn : 0
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* [ 4] en 50ms debounce : 1
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* [ 3] motion reporting : 0
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* [ 2] clip z if no finger : 0
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* [ 1] disable decel : 0
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* [ 0] enable dribble : 0 */
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touchpad_set_parameter(0, 0x21,
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(0x1 << 6) | (0x1 << 4));
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}
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/*
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* Button interrupt handler
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*/
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void button_int(void)
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{
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unsigned char data[4];
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int val;
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int_btn = BUTTON_NONE;
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val = touchpad_read_device(data, 4);
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if (val == MEP_BUTTON_HEADER)
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{
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/* Buttons packet */
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if (data[1] & 0x1) int_btn |= BUTTON_RIGHT;
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if (data[1] & 0x2) int_btn |= BUTTON_NEXT;
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if (data[1] & 0x4) int_btn |= BUTTON_PREV;
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if (data[1] & 0x8) int_btn |= BUTTON_LEFT;
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if (data[2] & 0x1) int_btn |= BUTTON_MENU;
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}
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else if (val == MEP_ABSOLUTE_HEADER && data[3] >= strip_pressure)
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{
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/* Absolute packet - the finger is on the vertical strip.
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Position ranges from 1-4095, with 1 at the bottom. */
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val = ((data[1] >> 4) << 8) | data[2]; /* position */
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if ((val > 0) && (val <= 1365))
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int_btn |= BUTTON_DOWN;
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else if ((val > 1365) && (val <= 2730))
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int_btn |= BUTTON_PLAY;
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else if ((val > 2730) && (val <= 4095))
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int_btn |= BUTTON_UP;
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}
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}
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#else
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void button_init_device(void)
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{
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}
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#endif /* BOOTLOADER */
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bool button_hold(void)
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{
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return !(GPIOL_INPUT_VAL & 0x40);
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}
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/*
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* Get button pressed from hardware
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*/
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int button_read_device(void)
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{
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int btn = int_btn;
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bool hold = !(GPIOL_INPUT_VAL & 0x40);
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#ifndef BOOTLOADER
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/* Backlight hold handling */
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if (hold != hold_button_old)
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{
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hold_button_old = hold;
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backlight_hold_changed(hold);
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}
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#endif
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if (hold)
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return BUTTON_NONE;
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if (!(GPIOB_INPUT_VAL & 0x20)) btn |= BUTTON_POWER;
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if (!(GPIOF_INPUT_VAL & 0x10)) btn |= BUTTON_VOL_UP;
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if (!(GPIOF_INPUT_VAL & 0x04)) btn |= BUTTON_VOL_DOWN;
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return btn;
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}
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bool headphones_inserted(void)
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{
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return (GPIOB_INPUT_VAL & 0x10) ? false : true;
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}
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