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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* 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 "system.h"
#include "usb.h"
#include "usb_core.h"
#include "power.h"
#include "power-gigabeat-s.h"
#include "backlight.h"
#include "backlight-target.h"
#include "avic-imx31.h"
#include "mc13783.h"
#include "dvfs_dptc-imx31.h"
#if CONFIG_TUNER
#include "fmradio_i2c.h"
#endif
static unsigned int power_status = POWER_INPUT_NONE;
/* Detect which power sources are present. */
unsigned int power_input_status(void)
{
unsigned int status = power_status;
if (GPIO3_DR & (1 << 20))
status |= POWER_INPUT_BATTERY;
if (usb_allowed_current() < 500)
{
/* ACK that USB is connected but NOT chargeable */
status &= ~(POWER_INPUT_USB_CHARGER & POWER_INPUT_CHARGER);
}
return status;
}
/* Detect changes in presence of the AC adaptor. */
void charger_main_detect_event(void)
{
if (mc13783_read(MC13783_INTERRUPT_SENSE0) & MC13783_SE1S)
power_status |= POWER_INPUT_MAIN_CHARGER;
else
power_status &= ~POWER_INPUT_MAIN_CHARGER;
}
/* Detect changes in USB bus power. Called from usb connect event handler. */
void charger_usb_detect_event(int status)
{
/* USB plugged does not imply charging is possible or even
* powering the device to maintain the battery. */
if (status == USB_INSERTED)
power_status |= POWER_INPUT_USB_CHARGER;
else
power_status &= ~POWER_INPUT_USB_CHARGER;
}
/* charging_state is implemented in powermgmt-imx31.c */
void ide_power_enable(bool on)
{
if (!on)
{
/* Bus must be isolated before power off */
imx31_regset32(&GPIO2_DR, (1 << 16));
}
/* HD power switch */
imx31_regmod32(&GPIO3_DR, on ? (1 << 5) : 0, (1 << 5));
if (on)
{
/* Bus switch may be turned on after powerup */
sleep(HZ/10);
imx31_regclr32(&GPIO2_DR, (1 << 16));
}
}
bool ide_powered(void)
{
return (GPIO3_DR & (1 << 5)) != 0;
}
#if CONFIG_TUNER
static bool tuner_on = false;
bool tuner_power(bool status)
{
if (status != tuner_on)
{
tuner_on = status;
/* Handle power and pin setup */
fmradio_i2c_enable(status);
status = !status;
}
return status;
}
bool tuner_powered(void)
{
return tuner_on;
}
#endif /* #if CONFIG_TUNER */
void power_off(void)
{
/* Turn off voltage and frequency scaling */
dvfs_dptc_stop();
/* Cut backlight */
_backlight_off();
/* Let it fade */
sleep(5*HZ/4);
/* Set user off mode */
mc13783_set(MC13783_POWER_CONTROL0, MC13783_USEROFFSPI);
/* Wait for power cut */
system_halt();
}
void power_init(void)
{
#if CONFIG_TUNER
fmradio_i2c_init();
#endif
/* Poll initial state */
charger_main_detect_event();
/* Enable detect event */
mc13783_enable_event(MC13783_SE1_EVENT);
}
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