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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald, Dana Conrad
*
* 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.
*
****************************************************************************/
// whole file copied from m3k
#include "power.h"
#include "adc.h"
#include "system.h"
#include "kernel.h"
#ifdef HAVE_USB_CHARGING_ENABLE
# include "usb_core.h"
#endif
#include "axp-pmu.h"
#include "i2c-x1000.h"
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
3470
};
/* The OF shuts down at this voltage */
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
3400
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
{ 3400, 3477, 3540, 3578, 3617, 3674, 3771, 3856, 3936, 4016, 4117 }
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
3400, 3477, 3540, 3578, 3617, 3674, 3771, 3856, 3936, 4016, 4117
};
void power_init(void)
{
/* Initialize driver */
i2c_x1000_set_freq(2, I2C_FREQ_400K);
axp_init();
/* Set lowest sample rate */
axp_adc_set_rate(AXP_ADC_RATE_25HZ);
/* Ensure battery voltage ADC is enabled */
int bits = axp_adc_get_enabled();
bits |= (1 << ADC_BATTERY_VOLTAGE);
axp_adc_set_enabled(bits);
/* Turn on all power outputs */
i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
AXP_REG_PWROUTPUTCTRL2, 0, 0x5f, NULL);
i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);
/* Set the default charging current. This is the same as the
* OF's setting, although it's not strictly within the USB spec. */
axp_set_charge_current(780);
/* Delay to give power outputs time to stabilize.
* From testing, 170 is the minimum. Make it
* 190 for safety. */
mdelay(190);
}
#ifdef HAVE_USB_CHARGING_ENABLE
void usb_charging_maxcurrent_change(int maxcurrent)
{
axp_set_charge_current(maxcurrent);
}
#endif
void adc_init(void)
{
}
void power_off(void)
{
axp_power_off();
while(1);
}
bool charging_state(void)
{
return axp_battery_status() == AXP_BATT_CHARGING;
}
int _battery_voltage(void)
{
return axp_adc_read(ADC_BATTERY_VOLTAGE);
}
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