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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Daniel Stenberg
*
* iPod driver based on code from the ipodlinux project - http://ipodlinux.org
* Adapted for Rockbox in December 2005
* Original file: linux/arch/armnommu/mach-ipod/keyboard.c
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* Rockbox button functions
*/
#include <stdlib.h>
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "adc.h"
#include "serial.h"
#include "power.h"
#include "system.h"
#include "powermgmt.h"
/* Variable to use for setting button status in interrupt handler */
int int_btn = BUTTON_NONE;
#ifdef HAVE_WHEEL_POSITION
static int wheel_position = -1;
static bool send_events = true;
#endif
static void handle_scroll_wheel(int new_scroll, int was_hold)
{
int wheel_keycode = BUTTON_NONE;
static int prev_scroll = -1;
static int direction = 0;
static int count = 0;
static int scroll_state[4][4] = {
{0, 1, -1, 0},
{-1, 0, 0, 1},
{1, 0, 0, -1},
{0, -1, 1, 0}
};
if ( prev_scroll == -1 ) {
prev_scroll = new_scroll;
}
else if (direction != scroll_state[prev_scroll][new_scroll]) {
direction = scroll_state[prev_scroll][new_scroll];
count = 0;
}
else if (!was_hold) {
backlight_on();
reset_poweroff_timer();
if (++count == 6) { /* reduce sensitivity */
count = 0;
/* Mini 1st Gen wheel has inverse direction mapping
* compared to 1st..3rd Gen wheel. */
switch (direction) {
case 1:
wheel_keycode = BUTTON_SCROLL_FWD;
break;
case -1:
wheel_keycode = BUTTON_SCROLL_BACK;
break;
default:
/* only happens if we get out of sync */
break;
}
}
}
if (wheel_keycode != BUTTON_NONE && queue_empty(&button_queue))
queue_post(&button_queue, wheel_keycode, 0);
prev_scroll = new_scroll;
}
/* mini 1 only, mini 2G uses iPod 4G code */
static int ipod_mini_button_read(void)
{
unsigned char source, wheel_source, state, wheel_state;
static bool was_hold = false;
int btn = BUTTON_NONE;
/* The ipodlinux source had a udelay(250) here, but testing has shown that
it is not needed - tested on mini 1g. */
/* udelay(250);*/
/* get source(s) of interupt */
source = GPIOA_INT_STAT & 0x3f;
wheel_source = GPIOB_INT_STAT & 0x30;
if (source == 0 && wheel_source == 0) {
return BUTTON_NONE; /* not for us */
}
/* get current keypad & wheel status */
state = GPIOA_INPUT_VAL & 0x3f;
wheel_state = GPIOB_INPUT_VAL & 0x30;
/* toggle interrupt level */
GPIOA_INT_LEV = ~state;
GPIOB_INT_LEV = ~wheel_state;
/* hold switch causes all outputs to go low */
/* we shouldn't interpret these as key presses */
if ((state & 0x20)) {
if (!(state & 0x1))
btn |= BUTTON_SELECT;
if (!(state & 0x2))
btn |= BUTTON_MENU;
if (!(state & 0x4))
btn |= BUTTON_PLAY;
if (!(state & 0x8))
btn |= BUTTON_RIGHT;
if (!(state & 0x10))
btn |= BUTTON_LEFT;
if (wheel_source & 0x30) {
handle_scroll_wheel((wheel_state & 0x30) >> 4, was_hold);
}
}
was_hold = button_hold();
/* ack any active interrupts */
if (source)
GPIOA_INT_CLR = source;
if (wheel_source)
GPIOB_INT_CLR = wheel_source;
return btn;
}
void ipod_mini_button_int(void)
{
CPU_HI_INT_CLR = GPIO0_MASK;
int_btn = ipod_mini_button_read();
//CPU_INT_EN = 0x40000000;
CPU_HI_INT_EN = GPIO0_MASK;
}
void button_init_device(void)
{
/* iPod Mini G1 */
/* buttons - enable as input */
GPIOA_ENABLE |= 0x3f;
GPIOA_OUTPUT_EN &= ~0x3f;
/* scroll wheel- enable as input */
GPIOB_ENABLE |= 0x30; /* port b 4,5 */
GPIOB_OUTPUT_EN &= ~0x30; /* port b 4,5 */
/* buttons - set interrupt levels */
GPIOA_INT_LEV = ~(GPIOA_INPUT_VAL & 0x3f);
GPIOA_INT_CLR = GPIOA_INT_STAT & 0x3f;
/* scroll wheel - set interrupt levels */
GPIOB_INT_LEV = ~(GPIOB_INPUT_VAL & 0x30);
GPIOB_INT_CLR = GPIOB_INT_STAT & 0x30;
/* enable interrupts */
GPIOA_INT_EN = 0x3f;
GPIOB_INT_EN = 0x30;
/* unmask interrupt */
CPU_INT_EN = 0x40000000;
CPU_HI_INT_EN = GPIO0_MASK;
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
static bool hold_button = false;
bool hold_button_old;
/* normal buttons */
hold_button_old = hold_button;
hold_button = button_hold();
if (hold_button != hold_button_old)
backlight_hold_changed(hold_button);
/* The int_btn variable is set in the button interrupt handler */
return int_btn;
}
bool button_hold(void)
{
return (GPIOA_INPUT_VAL & 0x20)?false:true;
}
bool headphones_inserted(void)
{
return (GPIOA_INPUT_VAL & 0x80)?true:false;
}
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