Subversion Repositories freemyipod

//

//

//    Copyright 2010 TheSeven

//

//

//    This file is part of emBIOS.

//

//    emBIOS 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.

//

//    emBIOS is distributed in the hope that it will be useful,

//    but WITHOUT ANY WARRANTY; without even the implied warranty of

//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

//    See the GNU General Public License for more details.

//

//    You should have received a copy of the GNU General Public License along

//    with emBIOS.  If not, see <http://www.gnu.org/licenses/>.

//

//

#include "global.h"

#include "clickwheel.h"

#include "button.h"

#include "thread.h"

#include "timer.h"

#include "s5l8701.h"

#include "contextswitch.h"

static struct wakeup clickwheel_wakeup IBSS_ATTR;

static volatile uint32_t clickwheel_packet IBSS_ATTR;

static uint32_t clickwheel_stack[0x100];

static bool oldtouched IBSS_ATTR;

static int oldpos IBSS_ATTR;

static int oldbuttons IBSS_ATTR;

static uint32_t lastpacket IBSS_ATTR;

static int packets IBSS_ATTR;

static int collect IBSS_ATTR;

static int lastdiff IBSS_ATTR;

void clickwheel_thread(void) ICODE_ATTR;

void clickwheel_thread()

{

    int i;

    while (true)

    {

        wakeup_wait(&clickwheel_wakeup, TIMEOUT_BLOCK);

        DEBUGF("Got clickwheel packet");

        uint32_t mode = enter_critical_section();

        uint32_t data = clickwheel_packet;

        leave_critical_section(mode);

        DEBUGF("Acquired clickwheel packet: %08X", data);

        if ((data & 0x800000FF) == 0x8000001A)

        {

            int newbuttons = (data >> 8) & 0x1f;

            int newpos = (data >> 16) & 0xff;

            bool newtouched = (data & 0x40000000) ? true : false;

            DEBUGF("This is a change packet, button state: %02X, position: %02d, touched: %d",

                   newbuttons, newpos, newtouched);

            int buttonschanged = oldbuttons ^ newbuttons;

            DEBUGF("Changed buttons: %02X", buttonschanged);

            for (i = 0; i < 5; i++)

                if ((buttonschanged >> i) & 1)

                {

                    if ((oldbuttons >> i) & 1) button_send_event(BUTTON_RELEASE, i, 0);

                    else button_send_event(BUTTON_PRESS, i, 0);

                }

            if (newtouched)

            {

                if (!oldtouched) button_send_event(WHEEL_TOUCH, 0, newpos);

                button_send_event(WHEEL_POSITION, 0, newpos);

                int distance = newpos - oldpos;

                DEBUGF("Time since last packet: %d microseconds", USEC_TIMER - lastpacket);

                if (TIMEOUT_EXPIRED(lastpacket, 200000))

                {

                    DEBUGF("Resetting accel due to timeout");

                    packets = 10;

                }

                else if (lastdiff * distance < 0)

                {

                    DEBUGF("Resetting accel due to direction change");

                    packets = 10;

                }

                else packets++;

                lastdiff = distance;

                if (packets > 200) packets = 200;

                if (distance < -48) distance += 96;

                else if (distance > 48) distance -= 96;

                DEBUGF("Wheel moved %d units without accel", distance);

                DEBUGF("Wheel moved %d units with accel", distance * packets);

                button_send_event(WHEEL_MOVED, 0, distance);

                collect += distance * packets;

                enum button_event e = collect > 0 ? WHEEL_FORWARD : WHEEL_BACKWARD;

                int data = (collect > 0 ? collect : -collect) / 128;

                if (data) button_send_event(e, 0, data);

                collect %= 128;

                DEBUGF("Wheel moved %d steps (%d left)", data, collect);

            }

            else if (oldtouched)

            {

                DEBUGF("Wheel was untouched");

                button_send_event(WHEEL_POSITION, 0, newpos);

                button_send_event(WHEEL_UNTOUCH, 0, newpos);

                collect = 0;

                packets = 0;

                lastdiff = 0;

            }

            oldbuttons = newbuttons;

            oldpos = newpos;

            oldtouched = newtouched;

            lastpacket = USEC_TIMER;

        }

        else if ((data & 0x8000FFFF) == 0x8000023A)

        {

            if (data & 0x1F0000) oldbuttons = (data >> 16) & 0x1F;

            DEBUGF("This is an init packet, button state: %02X", oldbuttons);

        }

    }

}

void clickwheel_init()

{

    wakeup_init(&clickwheel_wakeup);

    oldtouched = false;

    oldbuttons = 0;

    lastpacket = 0;

    collect = 0;

    lastdiff = 0;

    INTMSK |= 1 << IRQ_WHEEL;

    PWRCON(1) &= ~1;

    PCON15 = (PCON15 & ~0xFFFF0000) | 0x22220000;

    PUNK15 = 0xF0;

    WHEEL08 = 0x3A980;

    WHEEL00 = 0x280000;

    WHEEL10 = 3;

    PCON10 = (PCON10 & ~0xFF0) | 0x10;

    PDAT10 |= 2;

    WHEELTX = 0x8000023A;

    WHEEL04 |= 1;

    PDAT10 &= ~2;

    thread_create("Clickwheel dispatcher", clickwheel_thread, clickwheel_stack,

                  sizeof(clickwheel_stack), OS_THREAD, 200, true);

}

void INT_WHEEL(void) ICODE_ATTR;

void INT_WHEEL()

{

    uint32_t events = WHEELINT;

    if (events & 4) WHEELINT = 4;

    if (events & 2) WHEELINT = 2;

    if (events & 1)

    {

        clickwheel_packet = WHEELRX;

        wakeup_signal(&clickwheel_wakeup);

        WHEELINT = 1;

    }

}

uint32_t clickwheel_get_state()

{

    return (oldtouched << 15) | (oldpos << 8) | oldbuttons;

}