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845af676f8
Use it in fuzev2 to improve some big delays (correct the biggest one to actually wait for the fifo to empty), and use it in the sd drivers. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25734 a1c6a512-1295-4272-9138-f99709370657
144 lines
3.5 KiB
C
144 lines
3.5 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) 2010 by Thomas Martitz
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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 "config.h"
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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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extern void scrollwheel(unsigned wheel_value);
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#ifdef HAS_BUTTON_HOLD
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static bool hold_button = false;
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#endif
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void button_init_device(void)
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{
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GPIOA_DIR &= ~(1<<6|1<<7);
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GPIOC_DIR = 0;
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GPIOB_DIR |= (1<<4)|(1<<0);
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GPIOB_PIN(4) = 1<<4; /* activate the wheel */
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}
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void get_scrollwheel(void)
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{
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#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
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/* scroll wheel handling */
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#define GPIOA_PIN76_offset ((1<<(6+2)) | (1<<(7+2)))
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#define GPIOA_PIN76 (*(volatile unsigned char*)(GPIOA_BASE+GPIOA_PIN76_offset))
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scrollwheel(GPIOA_PIN76 >> 6);
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#endif
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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 = 0;
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static bool hold_button_old = false;
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static long power_counter = 0;
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unsigned gpiod6;
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/* if we don't wait for the fifo to empty, we'll see screen corruption
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* (the higher the CPU frequency the higher the corruption) */
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while ((DBOP_STAT & (1<<10)) == 0);
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get_scrollwheel();
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CCU_IO &= ~(1<<12);
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GPIOB_PIN(0) = 1<<0;
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udelay(1);
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gpiod6 = GPIOD_PIN(6);
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GPIOB_PIN(0) = 0;
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udelay(1);
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if (GPIOC_PIN(1) & 1<<1)
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btn |= BUTTON_DOWN;
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if (GPIOC_PIN(2) & 1<<2)
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btn |= BUTTON_UP;
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if (GPIOC_PIN(3) & 1<<3)
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btn |= BUTTON_LEFT;
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if (GPIOC_PIN(4) & 1<<4)
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btn |= BUTTON_SELECT;
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if (GPIOC_PIN(5) & 1<<5)
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btn |= BUTTON_RIGHT;
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if (GPIOB_PIN(1) & 1<<1)
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btn |= BUTTON_HOME;
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if (gpiod6 & 1<<6)
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{ /* power/hold is on the same pin. we know it's hold if the bit isn't
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* set now anymore */
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if (GPIOD_PIN(6) & 1<<6)
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{
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hold_button = false;
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btn |= BUTTON_POWER;
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}
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else
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{
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hold_button = true;
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}
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}
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CCU_IO |= 1<<12;
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#ifdef HAS_BUTTON_HOLD
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#ifndef BOOTLOADER
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/* light handling */
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if (hold_button != hold_button_old)
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{
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hold_button_old = hold_button;
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backlight_hold_changed(hold_button);
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}
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#else
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(void)hold_button_old;
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#endif
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if (hold_button)
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{
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power_counter = HZ;
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return 0;
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}
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/* read power, but not if hold button was just released, since
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* you basically always hit power due to the slider mechanism after releasing
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* (fuze only)
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*/
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else if (power_counter > 0)
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{
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power_counter--;
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btn &= ~BUTTON_POWER;
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}
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#endif
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return btn;
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}
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#ifdef HAS_BUTTON_HOLD
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bool button_hold(void)
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{
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return hold_button;
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}
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#endif
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