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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Maurus Cuelenaere
*
* 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 "jz4740.h"
#include "powermgmt.h"
#include "kernel.h"
#include "logf.h"
#include "adc.h"
#define SADC_CFG_INIT ( \
(2 << SADC_CFG_CLKOUT_NUM_BIT) | \
(1 << SADC_CFG_CLKDIV_BIT) | \
SADC_CFG_PBAT_HIGH | \
SADC_CFG_CMD_INT_PEN \
)
static volatile unsigned short bat_val;
static struct mutex battery_mtx;
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
/* TODO */
1000
};
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
/* TODO */
900
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
/* TODO */
{ 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000 },
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
/* TODO */
1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000
};
/* VBAT = (BDATA/4096) * 7.5V */
#define BATTERY_SCALE_FACTOR 1875
/* Returns battery voltage from ADC [millivolts] */
int _battery_voltage(void)
{
unsigned int dummy, timeout=HZ/4;
mutex_lock(&battery_mtx);
dummy = REG_SADC_BATDAT;
dummy = REG_SADC_BATDAT;
REG_SADC_ENA |= SADC_ENA_PBATEN;
bat_val = 0;
/* primitive wakeup event */
while(bat_val == 0 && timeout--)
sleep(0);
logf("%d %d", bat_val, (bat_val*BATTERY_SCALE_FACTOR)>>10);
mutex_unlock(&battery_mtx);
return (bat_val*BATTERY_SCALE_FACTOR)>>10;
}
void adc_init(void)
{
__cpm_start_sadc();
REG_SADC_ENA = 0;
REG_SADC_STATE &= ~REG_SADC_STATE;
REG_SADC_CTRL = 0x1F;
REG_SADC_CFG = SADC_CFG_INIT;
system_enable_irq(IRQ_SADC);
REG_SADC_SAMETIME = 10;
REG_SADC_WAITTIME = 100;
REG_SADC_STATE &= ~REG_SADC_STATE;
REG_SADC_CTRL = ~SADC_CTRL_PBATRDYM;
REG_SADC_ENA = 0;
mutex_init(&battery_mtx);
}
/* Interrupt handler */
void SADC(void)
{
unsigned char state;
unsigned char sadcstate;
sadcstate = REG_SADC_STATE;
state = REG_SADC_STATE & (~REG_SADC_CTRL);
REG_SADC_STATE &= sadcstate;
if(state & SADC_CTRL_PBATRDYM)
{
bat_val = REG_SADC_BATDAT;
/* Battery AD IRQ */
}
}
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