d10f9511cf
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22078 a1c6a512-1295-4272-9138-f99709370657
333 lines
12 KiB
C
333 lines
12 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) 2002 by Daniel Stenberg
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*
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* iPod driver based on code from the ipodlinux project - http://ipodlinux.org
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* Adapted for Rockbox in December 2005
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* Original file: linux/arch/armnommu/mach-ipod/keyboard.c
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* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
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*
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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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/*
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* Rockbox button functions
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*/
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#include <stdlib.h>
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#include "config.h"
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#include "cpu.h"
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#include "system.h"
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#include "button.h"
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#include "kernel.h"
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#include "backlight.h"
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#include "serial.h"
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#include "power.h"
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#include "powermgmt.h"
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#define WHEEL_FAST_OFF_TIMEOUT 250000 /* timeout for acceleration = 250ms */
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#define WHEEL_REPEAT_TIMEOUT 250000 /* timeout for button repeat = 250ms */
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#define WHEEL_UNTOUCH_TIMEOUT 150000 /* timeout for untouching wheel = 100ms */
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#define WHEELCLICKS_PER_ROTATION 96 /* wheelclicks per full rotation */
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/* This amount of clicks is needed for at least scrolling 1 item. Choose small values
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* to have high sensitivity but few precision, choose large values to have less
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* sensitivity and good precision. */
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#if defined(IPOD_NANO)
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#define WHEEL_SENSITIVITY 6 /* iPod nano has smaller wheel, lower sensitivity needed */
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#else
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#define WHEEL_SENSITIVITY 4 /* default sensitivity */
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#endif
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int old_wheel_value = -1;
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int new_wheel_value = 0;
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int repeat = 0;
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int wheel_delta = 0;
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bool wheel_is_touched = false;
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unsigned int accumulated_wheel_delta = 0;
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unsigned int wheel_repeat = 0;
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unsigned int wheel_velocity = 0;
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unsigned long last_wheel_usec = 0;
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/* Variable to use for setting button status in interrupt handler */
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int int_btn = BUTTON_NONE;
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#ifdef HAVE_WHEEL_POSITION
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static int wheel_position = -1;
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static bool send_events = true;
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#endif
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static void opto_i2c_init(void)
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{
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DEV_EN |= DEV_OPTO;
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DEV_RS |= DEV_OPTO;
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udelay(5);
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DEV_RS &= ~DEV_OPTO; /* finish reset */
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DEV_INIT1 |= INIT_BUTTONS; /* enable buttons (needed for "hold"-detection) */
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outl(0xc00a1f00, 0x7000c100);
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outl(0x01000000, 0x7000c104);
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}
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static inline int ipod_4g_button_read(void)
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{
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int whl = -1;
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int btn = BUTTON_NONE;
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/* The following delay was 250 in the ipodlinux source, but 50 seems to
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work fine - tested on Nano, Color/Photo and Video. */
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udelay(50);
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if ((inl(0x7000c104) & 0x04000000) != 0)
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{
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unsigned status = inl(0x7000c140);
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if ((status & 0x800000ff) == 0x8000001a)
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{
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if (status & 0x00000100)
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btn |= BUTTON_SELECT;
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if (status & 0x00000200)
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btn |= BUTTON_RIGHT;
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if (status & 0x00000400)
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btn |= BUTTON_LEFT;
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if (status & 0x00000800)
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btn |= BUTTON_PLAY;
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if (status & 0x00001000)
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btn |= BUTTON_MENU;
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if (status & 0x40000000)
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{
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unsigned long usec = USEC_TIMER;
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/* Highest wheel = 0x5F, clockwise increases */
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new_wheel_value = (status >> 16) & 0x7f;
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whl = new_wheel_value;
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/* switch on backlight (again), reset power-off timer */
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backlight_on();
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reset_poweroff_timer();
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/* Check whether the scrollwheel was untouched by accident or by will. */
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/* This is needed because wheel may be untoched very shortly during rotation */
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if ( (!wheel_is_touched) && TIME_AFTER(usec, last_wheel_usec + WHEEL_UNTOUCH_TIMEOUT) )
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{
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/* wheel has been really untouched -> reset internal variables */
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old_wheel_value = -1;
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wheel_velocity = 0;
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accumulated_wheel_delta = 0;
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wheel_repeat = BUTTON_NONE;
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}
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else
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{
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/* wheel was shortly untouched by accident -> leave internal variables */
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wheel_is_touched = true;
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}
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if (old_wheel_value >= 0)
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{
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/* This is for later = BUTTON_SCROLL_TOUCH;*/
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wheel_delta = new_wheel_value - old_wheel_value;
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unsigned int wheel_keycode = BUTTON_NONE;
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/* Taking into account wrapping during transition from highest
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* to lowest wheel position and back */
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if (wheel_delta < -WHEELCLICKS_PER_ROTATION/2)
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wheel_delta += WHEELCLICKS_PER_ROTATION; /* Forward wrapping case */
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else if (wheel_delta > WHEELCLICKS_PER_ROTATION/2)
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wheel_delta -= WHEELCLICKS_PER_ROTATION; /* Backward wrapping case */
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/* Getting direction and wheel_keycode from wheel_delta.
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* Need at least some clicks to be sure to avoid haptic fuzziness */
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if (wheel_delta >= WHEEL_SENSITIVITY)
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wheel_keycode = BUTTON_SCROLL_FWD;
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else if (wheel_delta <= -WHEEL_SENSITIVITY)
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wheel_keycode = BUTTON_SCROLL_BACK;
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else
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wheel_keycode = BUTTON_NONE;
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if (wheel_keycode != BUTTON_NONE)
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{
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long v = (usec - last_wheel_usec) & 0x7fffffff;
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/* undo signedness */
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wheel_delta = (wheel_delta>0) ? wheel_delta : -wheel_delta;
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/* add the current wheel_delta */
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accumulated_wheel_delta += wheel_delta;
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v = v ? (1000000 * wheel_delta) / v : 0; /* clicks/sec = 1000000 * clicks/usec */
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v = (v * 360) / WHEELCLICKS_PER_ROTATION; /* conversion to degree/sec */
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v = (v<0) ? -v : v; /* undo signedness */
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/* some velocity filtering to smooth things out */
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wheel_velocity = (31 * wheel_velocity + v) / 32;
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/* limit to 24 bit */
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wheel_velocity = (wheel_velocity>0xffffff) ? 0xffffff : wheel_velocity;
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/* assume REPEAT = off */
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repeat = 0;
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/* direction reversals must nullify acceleration and accumulator */
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if (wheel_keycode != wheel_repeat)
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{
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wheel_repeat = wheel_keycode;
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wheel_velocity = 0;
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accumulated_wheel_delta = 0;
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}
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/* on same direction REPEAT is assumed when new click is within timeout */
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else if (TIME_BEFORE(usec, last_wheel_usec + WHEEL_REPEAT_TIMEOUT))
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{
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repeat = BUTTON_REPEAT;
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}
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/* timeout nullifies acceleration and accumulator */
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if (TIME_AFTER(usec, last_wheel_usec + WHEEL_FAST_OFF_TIMEOUT))
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{
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wheel_velocity = 0;
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accumulated_wheel_delta = 0;
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}
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#ifdef HAVE_WHEEL_POSITION
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if (send_events)
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#endif
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/* The queue should have no other events when scrolling */
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if (queue_empty(&button_queue))
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{
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/* each WHEEL_SENSITIVITY clicks = scrolling 1 item */
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accumulated_wheel_delta /= WHEEL_SENSITIVITY;
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#ifdef HAVE_SCROLLWHEEL
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/* use data-format for HAVE_SCROLLWHEEL */
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/* always use acceleration mode (1<<31) */
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/* always set message post count to (1<<24) for iPod */
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/* this way the scrolling is always calculated from wheel_velocity */
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queue_post(&button_queue, wheel_keycode | repeat,
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(1<<31) | (1 << 24) | wheel_velocity);
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#else
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queue_post(&button_queue, wheel_keycode | repeat,
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(accumulated_wheel_delta << 16) | new_wheel_value);
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#endif
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accumulated_wheel_delta = 0;
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}
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last_wheel_usec = usec;
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old_wheel_value = new_wheel_value;
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}
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}
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else
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{
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/* scrollwheel was touched for the first time after finger lifting */
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old_wheel_value = new_wheel_value;
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wheel_is_touched = true;
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}
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}
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else
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{
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/* In this case the finger was lifted from the scrollwheel. */
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wheel_is_touched = false;
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}
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}
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}
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#ifdef HAVE_WHEEL_POSITION
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/* Save the new absolute wheel position */
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wheel_position = whl;
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#endif
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return btn;
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}
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#ifdef HAVE_WHEEL_POSITION
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int wheel_status(void)
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{
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return wheel_position;
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}
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void wheel_send_events(bool send)
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{
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send_events = send;
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}
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#endif
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void ipod_4g_button_int(void)
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{
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CPU_HI_INT_DIS = I2C_MASK;
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int_btn = ipod_4g_button_read();
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outl(inl(0x7000c104) | 0x0c000000, 0x7000c104);
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outl(0x400a1f00, 0x7000c100);
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CPU_HI_INT_EN = I2C_MASK;
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}
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void button_init_device(void)
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{
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opto_i2c_init();
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/* hold button - enable as input */
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GPIOA_ENABLE |= 0x20;
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GPIOA_OUTPUT_EN &= ~0x20;
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/* unmask interrupt */
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CPU_INT_EN = HI_MASK;
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CPU_HI_INT_EN = I2C_MASK;
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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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static bool hold_button = false;
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bool hold_button_old;
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/* normal buttons */
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hold_button_old = hold_button;
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hold_button = button_hold();
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if (hold_button != hold_button_old)
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{
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backlight_hold_changed(hold_button);
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if (hold_button)
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{
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/* lock -> disable wheel sensor */
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DEV_EN &= ~DEV_OPTO;
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}
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else
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{
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/* unlock -> enable wheel sensor */
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DEV_EN |= DEV_OPTO;
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opto_i2c_init();
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}
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}
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/* The int_btn variable is set in the button interrupt handler */
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#ifdef IPOD_ACCESSORY_PROTOCOL
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return int_btn | remote_control_rx();
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#else
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return int_btn;
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#endif
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}
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bool button_hold(void)
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{
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return (GPIOA_INPUT_VAL & 0x20)?false:true;
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}
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bool headphones_inserted(void)
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{
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return (GPIOA_INPUT_VAL & 0x80)?true:false;
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}
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