141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2021 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "power.h"
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#include "adc.h"
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#include "system.h"
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#include "axp-pmu.h"
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#ifdef HAVE_CW2015
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# include "cw2015.h"
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#endif
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#ifdef HAVE_USB_CHARGING_ENABLE
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# include "usb_core.h"
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#endif
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#include "i2c-x1000.h"
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/* TODO: Better(?) battery reporting for Q1 using CW2015 driver
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*
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* The CW2015 has its own quirks so the driver has to be more complicated
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* than "read stuff from I2C," unfortunately. Without fixing the quirks it
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* is probably worse than the simple voltage-based method.
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*
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* A bigger problem is that it shares an I2C bus with the AXP192, but when
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* we attempt to communicate with both chips, they start returning bogus
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* data intermittently. Ususally, reads will return 0 but sometimes they
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* can return other nonzero bogus data. It could be that one or the other is
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* pulling the bus line down inappropriately, or maybe the hardware does not
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* respect the bus free time between start/stop conditions and one of the
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* devices is getting confused.
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*/
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const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
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{
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3470
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};
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/* the OF shuts down at this voltage */
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const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
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{
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3400
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
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{
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{ 3400, 3639, 3697, 3723, 3757, 3786, 3836, 3906, 3980, 4050, 4159 }
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
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const unsigned short percent_to_volt_charge[11] =
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{
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3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
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};
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void power_init(void)
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{
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i2c_x1000_set_freq(AXP_PMU_BUS, I2C_FREQ_400K);
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axp_init();
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#ifdef HAVE_CW2015
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cw2015_init();
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#endif
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/* Change supply voltage from the default of 1250 mV to 1200 mV,
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* this matches the original firmware's settings. Didn't observe
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* any obviously bad behavior at 1250 mV, but better to be safe. */
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axp_supply_set_voltage(AXP_SUPPLY_DCDC2, 1200);
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/* For now, just turn everything on... definitely the touchscreen
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* is powered by one of the outputs */
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i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
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AXP_REG_PWROUTPUTCTRL1, 0, 0x05, NULL);
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i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
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AXP_REG_PWROUTPUTCTRL2, 0, 0x0f, NULL);
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i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
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AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);
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/* Delay to give power output time to stabilize */
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mdelay(20);
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}
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#ifdef HAVE_USB_CHARGING_ENABLE
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void usb_charging_maxcurrent_change(int maxcurrent)
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{
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axp_set_charge_current(maxcurrent);
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}
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#endif
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void power_off(void)
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{
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axp_power_off();
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while(1);
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}
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bool charging_state(void)
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{
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return axp_battery_status() == AXP_BATT_CHARGING;
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}
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int _battery_voltage(void)
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{
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/* CW2015 can also read battery voltage, but the AXP consistently
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* reads ~20-30 mV higher so I suspect it's the "real" voltage. */
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return axp_adc_read(ADC_BATTERY_VOLTAGE);
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}
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#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE) != 0
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int _battery_level(void)
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{
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return cw2015_get_soc();
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}
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#endif
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#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & TIME_MEASURE) != 0
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int _battery_time(void)
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{
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return cw2015_get_rrt();
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}
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#endif
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void adc_init(void)
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{
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}
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