rockbox/firmware/target/arm/s5l8700/ipodnano2g/powermgmt-nano2g.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright © 2008 Rafaël Carré
 *
 * 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 "powermgmt.h"
#include "pmu-target.h"

const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
    /* TODO: this is just an initial guess */
    3600
};

const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
    /* TODO: this is just an initial guess */
    3350
};

/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
    /* TODO: simple uncalibrated curve, linear except for first 10% */
    { 3377, 3741, 3783, 3820, 3856, 3892, 3934, 3989, 4061, 4144, 4249 }
};

#if CONFIG_CHARGING
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
    /* TODO: simple uncalibrated curve, linear except for first 10% */
    3344, 3969, 4038, 4105, 4205, 4310, 4312, 4314, 4316, 4318, 4320
};
#endif /* CONFIG_CHARGING */

/* ADC should read 0x3ff=6.00V */
#define BATTERY_SCALE_FACTOR 6000
/* full-scale ADC readout (2^10) in millivolt */


/* Returns battery voltage from ADC [millivolts] */
unsigned int battery_adc_voltage(void)
{
    return pmu_read_battery_voltage();
}