94c23e167c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27037 a1c6a512-1295-4272-9138-f99709370657
323 lines
9.2 KiB
C
323 lines
9.2 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2006 by Barry Wardell
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
|
|
|
|
#include "system.h"
|
|
#include "button.h"
|
|
#include "backlight.h"
|
|
#include "powermgmt.h"
|
|
|
|
#define WHEEL_REPEAT_VELOCITY 35 /* deg/s */
|
|
#define WHEEL_SMOOTHING_VELOCITY 50 /* deg/s */
|
|
#define WHEEL_FAST_ON_VELOCITY 350 /* deg/s */
|
|
#define WHEEL_FAST_OFF_VELOCITY 150 /* deg/s */
|
|
#define WHEEL_BASE_SENSITIVITY 2
|
|
#define WHEELCLICKS_PER_ROTATION 48 /* wheelclicks per full rotation */
|
|
|
|
#ifndef BOOTLOADER
|
|
/* Wheel */
|
|
static int read_wheel_keycode(void);
|
|
/* Buttons */
|
|
static bool hold_button = false;
|
|
static bool hold_button_old = false;
|
|
#define _button_hold() hold_button
|
|
#else
|
|
#define _button_hold() ((GPIOF_INPUT_VAL & 0x80) != 0)
|
|
#endif /* BOOTLOADER */
|
|
static int int_btn = BUTTON_NONE;
|
|
|
|
void button_init_device(void)
|
|
{
|
|
/* Enable all buttons */
|
|
GPIO_CLEAR_BITWISE(GPIOF_OUTPUT_EN, 0xff);
|
|
GPIO_SET_BITWISE(GPIOF_ENABLE, 0xff);
|
|
|
|
/* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
|
|
GPIO_SET_BITWISE(GPIOG_OUTPUT_EN, 0x80);
|
|
GPIO_SET_BITWISE(GPIOG_ENABLE, 0x80);
|
|
|
|
#ifndef BOOTLOADER
|
|
/* Mask these before performing init ... because init has possibly
|
|
occurred before */
|
|
GPIO_CLEAR_BITWISE(GPIOF_INT_EN, 0xff);
|
|
GPIO_CLEAR_BITWISE(GPIOH_INT_EN, 0xc0);
|
|
|
|
GPIO_CLEAR_BITWISE(GPIOH_OUTPUT_EN, 0xc0);
|
|
GPIO_SET_BITWISE(GPIOH_ENABLE, 0xc0);
|
|
|
|
/* Read initial buttons */
|
|
button_int();
|
|
|
|
/* Read initial wheel value (bit 6-7 of GPIOH) */
|
|
read_wheel_keycode();
|
|
|
|
/* Enable button interrupts */
|
|
GPIO_SET_BITWISE(GPIOF_INT_EN, 0xff);
|
|
GPIO_SET_BITWISE(GPIOH_INT_EN, 0xc0);
|
|
|
|
CPU_INT_EN = HI_MASK;
|
|
CPU_HI_INT_EN = GPIO1_MASK;
|
|
#endif /* BOOTLOADER */
|
|
}
|
|
|
|
bool button_hold(void)
|
|
{
|
|
return _button_hold();
|
|
}
|
|
|
|
/* clickwheel */
|
|
#ifndef BOOTLOADER
|
|
static int read_wheel_keycode(void)
|
|
{
|
|
/* Read wheel
|
|
* Bits 6 and 7 of GPIOH change as follows:
|
|
* Clockwise rotation 01 -> 00 -> 10 -> 11
|
|
* Counter-clockwise 11 -> 10 -> 00 -> 01
|
|
*
|
|
* This is equivalent to wheel_value of:
|
|
* Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
|
|
* Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
|
|
*/
|
|
static const unsigned char wheel_tbl[2][4] =
|
|
{
|
|
/* 0x00 0x40 0x80 0xc0 */ /* Wheel value */
|
|
{ 0x40, 0xc0, 0x00, 0x80 }, /* Clockwise rotation */
|
|
{ 0x80, 0x00, 0xc0, 0x40 }, /* Counter-clockwise */
|
|
};
|
|
|
|
static unsigned long prev_value;
|
|
|
|
int keycode = BUTTON_NONE;
|
|
|
|
unsigned long value = GPIOH_INPUT_VAL & 0xc0;
|
|
GPIO_WRITE_BITWISE(GPIOH_INT_LEV, value ^ 0xc0, 0xc0);
|
|
GPIOH_INT_CLR = GPIOH_INT_STAT & 0xc0;
|
|
|
|
if (!hold_button)
|
|
{
|
|
unsigned long prev = prev_value;
|
|
int scroll = value >> 6;
|
|
|
|
if (prev == wheel_tbl[0][scroll])
|
|
keycode = BUTTON_SCROLL_FWD;
|
|
else if (prev == wheel_tbl[1][scroll])
|
|
keycode = BUTTON_SCROLL_BACK;
|
|
}
|
|
|
|
prev_value = value;
|
|
|
|
return keycode;
|
|
}
|
|
|
|
void clickwheel_int(void)
|
|
{
|
|
static int prev_keycode = BUTTON_NONE;
|
|
static int prev_keypost = BUTTON_NONE;
|
|
static int count = 0;
|
|
static int fast_mode = 0;
|
|
static long next_backlight_on = 0;
|
|
|
|
static unsigned long prev_usec[WHEEL_BASE_SENSITIVITY] = { 0 };
|
|
static unsigned long delta = 1ul << 24;
|
|
static unsigned long velocity = 0; /* Velocity smoothed or unsmoothed */
|
|
|
|
unsigned long usec = USEC_TIMER;
|
|
unsigned long v; /* Raw velocity */
|
|
|
|
int keycode = read_wheel_keycode();
|
|
|
|
if (keycode == BUTTON_NONE)
|
|
return;
|
|
|
|
/* Spurious wheel "reversals" are not uncommon. Resetting also helps
|
|
* cover them up. As such, prev_keypost is also not reset or else false
|
|
* non-repeats are generated when it happens. */
|
|
if (keycode != prev_keycode)
|
|
{
|
|
/* Direction reversals reset state */
|
|
unsigned long usec_back = 360000000ul /
|
|
(WHEEL_REPEAT_VELOCITY*WHEELCLICKS_PER_ROTATION);
|
|
prev_keycode = keycode;
|
|
count = 0;
|
|
fast_mode = 0;
|
|
prev_usec[0] = usec - usec_back;
|
|
prev_usec[1] = prev_usec[0] - usec_back;
|
|
delta = 1ul << 24;
|
|
velocity = 0;
|
|
}
|
|
|
|
if (TIME_AFTER(current_tick, next_backlight_on))
|
|
{
|
|
/* Poke backlight to turn it on or maintain it no more often
|
|
* than every 1/4 second */
|
|
next_backlight_on = current_tick + HZ/4;
|
|
backlight_on();
|
|
buttonlight_on();
|
|
reset_poweroff_timer();
|
|
}
|
|
|
|
/* Calculate deg/s based upon interval and number of clicks in that
|
|
* interval - FIR moving average */
|
|
v = usec - prev_usec[1];
|
|
|
|
if ((long)v <= 0)
|
|
{
|
|
/* timer wrapped (no activity for awhile), skip acceleration */
|
|
v = 0;
|
|
delta = 1ul << 24;
|
|
}
|
|
else
|
|
{
|
|
/* Check overflow below */
|
|
if (v > 0xfffffffful / WHEELCLICKS_PER_ROTATION)
|
|
v = 0xfffffffful / WHEELCLICKS_PER_ROTATION;
|
|
|
|
v = 360000000ul*WHEEL_BASE_SENSITIVITY / (v*WHEELCLICKS_PER_ROTATION);
|
|
|
|
if (v > 0xfffffful)
|
|
v = 0xfffffful; /* limit to 24 bits */
|
|
}
|
|
|
|
prev_usec[1] = prev_usec[0];
|
|
prev_usec[0] = usec;
|
|
|
|
if (v < WHEEL_SMOOTHING_VELOCITY)
|
|
{
|
|
/* Very slow - no smoothing */
|
|
velocity = v;
|
|
/* Ensure backlight never gets stuck for an extended period if tick
|
|
* wrapped such that next poke is very far ahead */
|
|
next_backlight_on = current_tick - 1;
|
|
}
|
|
else
|
|
{
|
|
/* Some velocity filtering to smooth things out */
|
|
velocity = (7*velocity + v) / 8;
|
|
}
|
|
|
|
if (fast_mode != 0)
|
|
{
|
|
/* Fast OFF happens immediately when velocity drops below
|
|
threshold */
|
|
if (v < WHEEL_FAST_OFF_VELOCITY)
|
|
{
|
|
fast_mode = 0; /* moving out of fast mode */
|
|
velocity = v;
|
|
|
|
/* delta is always 1 in slow mode */
|
|
delta = 1ul << 24;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Fast ON gets filtered to avoid inadvertent jumps to fast mode */
|
|
if (velocity >= WHEEL_FAST_ON_VELOCITY)
|
|
fast_mode = 1; /* moving into fast mode */
|
|
|
|
/* delta is always 1 in slow mode */
|
|
delta = 1ul << 24;
|
|
}
|
|
|
|
count += fast_mode + 1;
|
|
if (count < WHEEL_BASE_SENSITIVITY)
|
|
return;
|
|
|
|
count = 0;
|
|
|
|
if (queue_empty(&button_queue))
|
|
{
|
|
/* Post wheel keycode with wheel data */
|
|
int key = keycode;
|
|
|
|
if (v >= WHEEL_REPEAT_VELOCITY && prev_keypost == key)
|
|
{
|
|
/* Quick enough and same key is being posted more than once in a
|
|
* row - generate repeats - use unsmoothed v */
|
|
key |= BUTTON_REPEAT;
|
|
}
|
|
|
|
prev_keypost = keycode;
|
|
|
|
queue_post(&button_queue, key, (fast_mode << 31) | delta | velocity);
|
|
/* Message posted - reset delta */
|
|
delta = 1ul << 24;
|
|
}
|
|
else
|
|
{
|
|
/* Skipped post - increment delta and limit to 7 bits */
|
|
delta += 1ul << 24;
|
|
|
|
if (delta > (0x7ful << 24))
|
|
delta = 0x7ful << 24;
|
|
}
|
|
}
|
|
#endif /* BOOTLOADER */
|
|
|
|
/* device buttons */
|
|
void button_int(void)
|
|
{
|
|
unsigned long state = GPIOF_INPUT_VAL & 0xff;
|
|
|
|
#ifndef BOOTLOADER
|
|
unsigned long status = GPIOF_INT_STAT;
|
|
|
|
GPIO_WRITE_BITWISE(GPIOF_INT_LEV, state ^ 0xff, 0xff);
|
|
GPIOF_INT_CLR = status;
|
|
|
|
hold_button = (state & 0x80) != 0;
|
|
#endif
|
|
|
|
int_btn = BUTTON_NONE;
|
|
|
|
if (!_button_hold())
|
|
{
|
|
/* Read normal buttons */
|
|
if ((state & 0x01) == 0) int_btn |= BUTTON_REC;
|
|
if ((state & 0x02) == 0) int_btn |= BUTTON_DOWN;
|
|
if ((state & 0x04) == 0) int_btn |= BUTTON_RIGHT;
|
|
if ((state & 0x08) == 0) int_btn |= BUTTON_LEFT;
|
|
if ((state & 0x10) == 0) int_btn |= BUTTON_SELECT; /* The centre button */
|
|
if ((state & 0x20) == 0) int_btn |= BUTTON_UP; /* The "play" button */
|
|
if ((state & 0x40) != 0) int_btn |= BUTTON_POWER;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get button pressed from hardware
|
|
*/
|
|
int button_read_device(void)
|
|
{
|
|
#ifdef BOOTLOADER
|
|
/* Read buttons directly in the bootloader */
|
|
button_int();
|
|
#else
|
|
/* light handling */
|
|
if (hold_button != hold_button_old)
|
|
{
|
|
hold_button_old = hold_button;
|
|
backlight_hold_changed(hold_button);
|
|
}
|
|
#endif /* BOOTLOADER */
|
|
|
|
/* The int_btn variable is set in the button interrupt handler */
|
|
return int_btn;
|
|
}
|