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https://github.com/Rockbox/rockbox.git
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806b71b2ed
Several hosted targets read their battery state from a fixed sysfs path. Get rid of the duplicated code by handling this common case in power-linux.c. Some targets use non-standard units in sysfs instead of the typical microvolts / microamps, so allow the scale factors to be overridden by the target. Change-Id: I31dc4ffc7a2d2c066d00a74070f9f9849c1663d0
131 lines
3.6 KiB
C
131 lines
3.6 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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*
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* Copyright (C) 2021 by Solomon Peachy
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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 <sys/types.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "system.h"
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#include "power.h"
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#include "panic.h"
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#include "sysfs.h"
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#include "tick.h"
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#ifdef FIIO_M3K_LINUX
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#include "usb.h"
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#endif
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#ifdef BATTERY_DEV_NAME
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# define BATTERY_SYSFS_PATH "/sys/class/power_supply/" BATTERY_DEV_NAME
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# define BATTERY_STATUS_PATH BATTERY_SYSFS_PATH "/status"
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# define BATTERY_VOLTAGE_PATH BATTERY_SYSFS_PATH "/voltage_now"
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# define BATTERY_CURRENT_PATH BATTERY_SYSFS_PATH "/current_now"
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# define BATTERY_LEVEL_PATH BATTERY_SYSFS_PATH "/capacity"
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#endif
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/* Voltage is normally in microvolts */
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#ifndef BATTERY_VOLTAGE_SCALE_MUL
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# define BATTERY_VOLTAGE_SCALE_MUL 1
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#endif
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#ifndef BATTERY_VOLTAGE_SCALE_DIV
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# define BATTERY_VOLTAGE_SCALE_DIV 1000
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#endif
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/* Current is normally in microamps */
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#ifndef BATTERY_CURRENT_SCALE_MUL
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# define BATTERY_CURRENT_SCALE_MUL 1
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#endif
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#ifndef BATTERY_CURRENT_SCALE_DIV
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# define BATTERY_CURRENT_SCALE_DIV 1000
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#endif
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/* Level is normally in whole percentage points (0-100) */
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#ifndef BATTERY_LEVEL_SCALE_MUL
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# define BATTERY_LEVEL_SCALE_MUL 1
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#endif
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#ifndef BATTERY_LEVEL_SCALE_DIV
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# define BATTERY_LEVEL_SCALE_DIV 1
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#endif
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#define POWER_STATUS_PATH "/sys/class/power_supply/" POWER_DEV_NAME "/online"
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#ifdef BATTERY_DEV_NAME
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/* We get called multiple times per tick, let's cut that back! */
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static long last_tick = 0;
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static bool last_power = false;
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bool charging_state(void)
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{
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if ((current_tick - last_tick) > HZ/2 ) {
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char buf[12] = {0};
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sysfs_get_string(BATTERY_STATUS_PATH, buf, sizeof(buf));
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last_tick = current_tick;
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last_power = (strncmp(buf, "Charging", 8) == 0);
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}
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return last_power;
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}
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#if (CONFIG_BATTERY_MEASURE & VOLTAGE_MEASURE)
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int _battery_voltage(void)
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{
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int voltage = 0;
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sysfs_get_int(BATTERY_VOLTAGE_PATH, &voltage);
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return (voltage * BATTERY_VOLTAGE_SCALE_MUL) / BATTERY_VOLTAGE_SCALE_DIV;
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}
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#endif
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#if (CONFIG_BATTERY_MEASURE & CURRENT_MEASURE)
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int _battery_current(void)
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{
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int current = 0;
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sysfs_get_int(BATTERY_CURRENT_PATH, ¤t);
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return (current * BATTERY_CURRENT_SCALE_MUL) / BATTERY_CURRENT_SCALE_DIV;
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}
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#endif
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#if (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE)
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int _battery_level(void)
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{
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int level = 0;
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sysfs_get_int(BATTERY_LEVEL_PATH, &level);
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return (level * BATTERY_LEVEL_SCALE_MUL) / BATTERY_LEVEL_SCALE_DIV;
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}
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#endif
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#endif
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unsigned int power_input_status(void)
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{
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int present = 0;
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sysfs_get_int(POWER_STATUS_PATH, &present);
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#ifdef FIIO_M3K_LINUX
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usb_enable(present ? true : false);
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#endif
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return present ? POWER_INPUT_USB_CHARGER : POWER_INPUT_NONE;
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}
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