rockbox/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald
*
* 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 "power.h"
#include "adc.h"
#include "system.h"
#include "axp-pmu.h"
#ifdef HAVE_CW2015
# include "cw2015.h"
#endif
#ifdef HAVE_USB_CHARGING_ENABLE
# include "usb_core.h"
#endif
#include "i2c-x1000.h"
/* TODO: Better(?) battery reporting for Q1 using CW2015 driver
*
* The CW2015 has its own quirks so the driver has to be more complicated
* than "read stuff from I2C," unfortunately. Without fixing the quirks it
* is probably worse than the simple voltage-based method.
*
* A bigger problem is that it shares an I2C bus with the AXP192, but when
* we attempt to communicate with both chips, they start returning bogus
* data intermittently. Ususally, reads will return 0 but sometimes they
* can return other nonzero bogus data. It could be that one or the other is
* pulling the bus line down inappropriately, or maybe the hardware does not
* respect the bus free time between start/stop conditions and one of the
* devices is getting confused.
*/
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, 3639, 3697, 3723, 3757, 3786, 3836, 3906, 3980, 4050, 4159 }
};
/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
};
void power_init(void)
{
i2c_x1000_set_freq(AXP_PMU_BUS, I2C_FREQ_400K);
axp_init();
#ifdef HAVE_CW2015
cw2015_init();
#endif
/* Change supply voltage from the default of 1250 mV to 1200 mV,
* this matches the original firmware's settings. Didn't observe
* any obviously bad behavior at 1250 mV, but better to be safe. */
axp_supply_set_voltage(AXP_SUPPLY_DCDC2, 1200);
/* For now, just turn everything on... definitely the touchscreen
* is powered by one of the outputs */
i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
AXP_REG_PWROUTPUTCTRL1, 0, 0x05, NULL);
i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
AXP_REG_PWROUTPUTCTRL2, 0, 0x0f, NULL);
i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);
/* Delay to give power output time to stabilize */
mdelay(20);
}
#ifdef HAVE_USB_CHARGING_ENABLE
void usb_charging_maxcurrent_change(int maxcurrent)
{
axp_set_charge_current(maxcurrent);
}
#endif
void power_off(void)
{
axp_power_off();
while(1);
}
bool charging_state(void)
{
return axp_battery_status() == AXP_BATT_CHARGING;
}
int _battery_voltage(void)
{
/* CW2015 can also read battery voltage, but the AXP consistently
* reads ~20-30 mV higher so I suspect it's the "real" voltage. */
return axp_adc_read(ADC_BATTERY_VOLTAGE);
}
#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE) != 0
int _battery_level(void)
{
return cw2015_get_soc();
}
#endif
#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & TIME_MEASURE) != 0
int _battery_time(void)
{
return cw2015_get_rrt();
}
#endif
void adc_init(void)
{
}