/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id:$
 *
 * Copyright (C) 2009 by Szymon Dziok
 *
 * 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.
 *
 ****************************************************************************/

#include "config.h"
#include "cpu.h"
#include <stdbool.h>
#include "kernel.h"
#include "system.h"
#include "power.h"
#include "logf.h"
#include "usb.h"
#include "synaptics-mep.h"


/* sensitivity settings for capacitive buttons and scrollstrip.
   The values are signed 4-bit two's complement,
   reaching from -8 (least sensitive) to +7 (most sensitive)    */
#define MEP_SENSITIVITY_BTN     2
#define MEP_SENSITIVITY_STRIP   4


void power_init(void)
{
    GPIOD_ENABLE |= 0x80;          /* enable ACK */
    GPIOA_ENABLE |= (0x10 | 0x20); /* enable DATA, CLK */

    GPIOD_OUTPUT_EN  |=  0x80; /* set ACK */
    GPIOD_OUTPUT_VAL |=  0x80; /*    high */

    GPIOA_OUTPUT_EN  &= ~0x20; /* CLK */

    GPIOA_OUTPUT_EN  |=  0x10; /* set DATA */
    GPIOA_OUTPUT_VAL |=  0x10; /*     high */

    if (!touchpad_init())
    {
        logf("touchpad not ready");
    }
    /* Set touch sensivity, Rate=80/s,NoFilter=0,
       KeyMatrix=0,Buttons=1,Relative=0,Absolute=1.
       MEP parameter 0x20 - Report Modes */
    touchpad_set_parameter(0,0x20,0x0085 | (MEP_SENSITIVITY_BTN & 0x0F)<<12
                                         | (MEP_SENSITIVITY_STRIP & 0x0F)<<8);
    /* MinAbsReporting=0, NotAllCapButtons=0,SingleCapButton=0,
       50msDebounce=0,MotionReporting=1 (reduce transmission overhead),
       ClipZifnoFinger=0,DisableDeceleration=0,Dribble=0.
       MEP parameter 0x21 - Enhanced Operating Configuration */
    touchpad_set_parameter(0,0x21,0x0008);
    /* Set the GPO_LEVELS = 0 - for the button lights */
    touchpad_set_parameter(0,0x23,0x0000);

    /* Sound unmute (on) */
    GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x10);
}

unsigned int power_input_status(void)
{
    unsigned int status = POWER_INPUT_NONE;
    /* GPIOL - external charger connected  */
    if (GPIOL_INPUT_VAL & 0x20)
    status = POWER_INPUT_MAIN_CHARGER;
    /* GPIOL - usb connected */
    if (GPIOL_INPUT_VAL & 0x04)
    status |= POWER_INPUT_USB_CHARGER;

    return status;
}

void ide_power_enable(bool on)
{
    if(on){
        GPIO_SET_BITWISE(GPIOC_OUTPUT_VAL, 0x08);
        DEV_EN |= DEV_IDE0;
    } else
    {
        DEV_EN &= ~DEV_IDE0;
        GPIO_CLEAR_BITWISE(GPIOC_OUTPUT_VAL, 0x08);
    }
}

bool ide_powered(void)
{
    return ((GPIOC_INPUT_VAL & 0x08) != 0);
}

void power_off(void)
{
    /* Sound mute (off) */
    DEV_INIT2 |= DEV_I2S;
    GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x10);
    /* shutdown bit */
    GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x80);
    /* button lights off */
    touchpad_set_parameter(0,0x22,0x0000);
    /* ATA power off */
    ide_power_enable(false);
    /* ? - in the OF */
    GPO32_VAL |= 0x40000000;
    GPO32_ENABLE |= 0x40000000;
    /* lcd controller off ? - makes lcd white until power on */
    GPIO_CLEAR_BITWISE(GPIOJ_OUTPUT_VAL, 0x04);
    /* a way to poweroff while charging = system_reset */
    if (power_input_status())
    system_reboot();
}