05f12e0877
Voltage can be read using as3543 adc (i.e. ascodec api, on this target implemented via ioctl()). TODO: Look into possibly controlling charging more by re-using powermgmt-ascodec.c. However, charging seems to be controlled by the kernel, so may not be needed. Charger state can be read using /dev/minivet. It allows to differentiate between wall charger and usb charging, but that's not implemented (is it even worthwhile?) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31470 a1c6a512-1295-4272-9138-f99709370657
88 lines
2.8 KiB
C
88 lines
2.8 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: powermgmt-sim.c 29543 2011-03-08 19:33:30Z thomasjfox $
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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 "config.h"
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#include <sys/ioctl.h>
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#include "kernel.h"
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#include "powermgmt.h"
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#include "power.h"
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#include "file.h"
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#include "ascodec-target.h"
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#include "as3514.h"
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#include "sc900776.h"
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const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
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{
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3500
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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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3450
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};
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
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/* FIXME: This is guessed. Make proper curve using battery_bench */
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const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
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{
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{ 3450, 3692, 3740, 3772, 3798, 3828, 3876, 3943, 4013, 4094, 4194 }
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};
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#if CONFIG_CHARGING
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/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
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/* FIXME: This is guessed. Make proper curve using battery_bench */
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const unsigned short const percent_to_volt_charge[11] =
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{
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3600, 3802, 3856, 3888, 3905, 3931, 3973, 4025, 4084, 4161, 4219
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};
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unsigned int power_input_status(void)
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{
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unsigned status = POWER_INPUT_NONE;
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int fd = open("/dev/minivet", O_RDONLY);
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if (fd >= 0)
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{
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if (ioctl(fd, IOCTL_MINIVET_DET_VBUS, NULL) > 0)
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status = POWER_INPUT_MAIN_CHARGER;
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close(fd);
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}
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return status;
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}
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#endif /* CONFIG_CHARGING */
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/* Returns battery voltage from ADC [millivolts],
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* adc returns voltage in 5mV steps */
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unsigned int battery_adc_voltage(void)
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{
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return adc_read(3) * 5;
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}
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bool charging_state(void)
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{
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/* cannot make this static (initializer not constant error), but gcc
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* seems to calculate at compile time anyway */
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const unsigned short charged_thres =
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((percent_to_volt_charge[9] + percent_to_volt_charge[10]) / 2);
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bool ret = (power_input_status() == POWER_INPUT_MAIN_CHARGER);
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/* dont indicate for > ~95% */
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return ret && (battery_adc_voltage() <= charged_thres);
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}
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