mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Jingoo Han](/assets/img/avatar_default.png)
The driver core clears the driver data to NULL after device_release or on
probe failure, since commit 0998d06310
(device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is
not needed to manually clear the device driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
2169 lines
61 KiB
C
2169 lines
61 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2012
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* Copyright (c) 2012 Sony Mobile Communications AB
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*
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* Charging algorithm driver for abx500 variants
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*
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* License Terms: GNU General Public License v2
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* Authors:
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* Johan Palsson <johan.palsson@stericsson.com>
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* Karl Komierowski <karl.komierowski@stericsson.com>
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* Arun R Murthy <arun.murthy@stericsson.com>
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* Author: Imre Sunyi <imre.sunyi@sonymobile.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/hrtimer.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/completion.h>
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#include <linux/workqueue.h>
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#include <linux/kobject.h>
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#include <linux/of.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500/ux500_chargalg.h>
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#include <linux/mfd/abx500/ab8500-bm.h>
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#include <linux/notifier.h>
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/* Watchdog kick interval */
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#define CHG_WD_INTERVAL (6 * HZ)
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/* End-of-charge criteria counter */
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#define EOC_COND_CNT 10
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/* One hour expressed in seconds */
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#define ONE_HOUR_IN_SECONDS 3600
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/* Five minutes expressed in seconds */
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#define FIVE_MINUTES_IN_SECONDS 300
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/* Plus margin for the low battery threshold */
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#define BAT_PLUS_MARGIN (100)
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#define CHARGALG_CURR_STEP_LOW 0
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#define CHARGALG_CURR_STEP_HIGH 100
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#define to_abx500_chargalg_device_info(x) container_of((x), \
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struct abx500_chargalg, chargalg_psy);
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enum abx500_chargers {
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NO_CHG,
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AC_CHG,
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USB_CHG,
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};
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struct abx500_chargalg_charger_info {
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enum abx500_chargers conn_chg;
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enum abx500_chargers prev_conn_chg;
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enum abx500_chargers online_chg;
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enum abx500_chargers prev_online_chg;
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enum abx500_chargers charger_type;
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bool usb_chg_ok;
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bool ac_chg_ok;
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int usb_volt;
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int usb_curr;
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int ac_volt;
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int ac_curr;
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int usb_vset;
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int usb_iset;
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int ac_vset;
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int ac_iset;
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};
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struct abx500_chargalg_suspension_status {
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bool suspended_change;
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bool ac_suspended;
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bool usb_suspended;
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};
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struct abx500_chargalg_current_step_status {
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bool curr_step_change;
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int curr_step;
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};
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struct abx500_chargalg_battery_data {
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int temp;
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int volt;
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int avg_curr;
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int inst_curr;
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int percent;
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};
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enum abx500_chargalg_states {
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STATE_HANDHELD_INIT,
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STATE_HANDHELD,
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STATE_CHG_NOT_OK_INIT,
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STATE_CHG_NOT_OK,
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STATE_HW_TEMP_PROTECT_INIT,
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STATE_HW_TEMP_PROTECT,
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STATE_NORMAL_INIT,
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STATE_USB_PP_PRE_CHARGE,
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STATE_NORMAL,
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STATE_WAIT_FOR_RECHARGE_INIT,
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STATE_WAIT_FOR_RECHARGE,
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STATE_MAINTENANCE_A_INIT,
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STATE_MAINTENANCE_A,
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STATE_MAINTENANCE_B_INIT,
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STATE_MAINTENANCE_B,
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STATE_TEMP_UNDEROVER_INIT,
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STATE_TEMP_UNDEROVER,
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STATE_TEMP_LOWHIGH_INIT,
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STATE_TEMP_LOWHIGH,
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STATE_SUSPENDED_INIT,
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STATE_SUSPENDED,
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STATE_OVV_PROTECT_INIT,
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STATE_OVV_PROTECT,
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STATE_SAFETY_TIMER_EXPIRED_INIT,
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STATE_SAFETY_TIMER_EXPIRED,
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STATE_BATT_REMOVED_INIT,
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STATE_BATT_REMOVED,
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STATE_WD_EXPIRED_INIT,
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STATE_WD_EXPIRED,
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};
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static const char *states[] = {
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"HANDHELD_INIT",
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"HANDHELD",
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"CHG_NOT_OK_INIT",
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"CHG_NOT_OK",
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"HW_TEMP_PROTECT_INIT",
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"HW_TEMP_PROTECT",
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"NORMAL_INIT",
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"USB_PP_PRE_CHARGE",
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"NORMAL",
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"WAIT_FOR_RECHARGE_INIT",
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"WAIT_FOR_RECHARGE",
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"MAINTENANCE_A_INIT",
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"MAINTENANCE_A",
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"MAINTENANCE_B_INIT",
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"MAINTENANCE_B",
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"TEMP_UNDEROVER_INIT",
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"TEMP_UNDEROVER",
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"TEMP_LOWHIGH_INIT",
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"TEMP_LOWHIGH",
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"SUSPENDED_INIT",
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"SUSPENDED",
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"OVV_PROTECT_INIT",
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"OVV_PROTECT",
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"SAFETY_TIMER_EXPIRED_INIT",
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"SAFETY_TIMER_EXPIRED",
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"BATT_REMOVED_INIT",
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"BATT_REMOVED",
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"WD_EXPIRED_INIT",
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"WD_EXPIRED",
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};
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struct abx500_chargalg_events {
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bool batt_unknown;
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bool mainextchnotok;
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bool batt_ovv;
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bool batt_rem;
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bool btemp_underover;
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bool btemp_lowhigh;
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bool main_thermal_prot;
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bool usb_thermal_prot;
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bool main_ovv;
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bool vbus_ovv;
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bool usbchargernotok;
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bool safety_timer_expired;
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bool maintenance_timer_expired;
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bool ac_wd_expired;
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bool usb_wd_expired;
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bool ac_cv_active;
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bool usb_cv_active;
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bool vbus_collapsed;
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};
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/**
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* struct abx500_charge_curr_maximization - Charger maximization parameters
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* @original_iset: the non optimized/maximised charger current
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* @current_iset: the charging current used at this moment
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* @test_delta_i: the delta between the current we want to charge and the
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current that is really going into the battery
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* @condition_cnt: number of iterations needed before a new charger current
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is set
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* @max_current: maximum charger current
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* @wait_cnt: to avoid too fast current step down in case of charger
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* voltage collapse, we insert this delay between step
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* down
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* @level: tells in how many steps the charging current has been
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increased
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*/
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struct abx500_charge_curr_maximization {
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int original_iset;
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int current_iset;
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int test_delta_i;
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int condition_cnt;
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int max_current;
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int wait_cnt;
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u8 level;
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};
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enum maxim_ret {
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MAXIM_RET_NOACTION,
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MAXIM_RET_CHANGE,
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MAXIM_RET_IBAT_TOO_HIGH,
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};
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/**
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* struct abx500_chargalg - abx500 Charging algorithm device information
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* @dev: pointer to the structure device
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* @charge_status: battery operating status
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* @eoc_cnt: counter used to determine end-of_charge
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* @maintenance_chg: indicate if maintenance charge is active
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* @t_hyst_norm temperature hysteresis when the temperature has been
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* over or under normal limits
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* @t_hyst_lowhigh temperature hysteresis when the temperature has been
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* over or under the high or low limits
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* @charge_state: current state of the charging algorithm
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* @ccm charging current maximization parameters
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* @chg_info: information about connected charger types
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* @batt_data: data of the battery
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* @susp_status: current charger suspension status
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* @bm: Platform specific battery management information
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* @curr_status: Current step status for over-current protection
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* @parent: pointer to the struct abx500
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* @chargalg_psy: structure that holds the battery properties exposed by
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* the charging algorithm
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* @events: structure for information about events triggered
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* @chargalg_wq: work queue for running the charging algorithm
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* @chargalg_periodic_work: work to run the charging algorithm periodically
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* @chargalg_wd_work: work to kick the charger watchdog periodically
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* @chargalg_work: work to run the charging algorithm instantly
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* @safety_timer: charging safety timer
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* @maintenance_timer: maintenance charging timer
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* @chargalg_kobject: structure of type kobject
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*/
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struct abx500_chargalg {
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struct device *dev;
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int charge_status;
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int eoc_cnt;
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bool maintenance_chg;
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int t_hyst_norm;
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int t_hyst_lowhigh;
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enum abx500_chargalg_states charge_state;
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struct abx500_charge_curr_maximization ccm;
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struct abx500_chargalg_charger_info chg_info;
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struct abx500_chargalg_battery_data batt_data;
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struct abx500_chargalg_suspension_status susp_status;
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struct ab8500 *parent;
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struct abx500_chargalg_current_step_status curr_status;
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struct abx500_bm_data *bm;
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struct power_supply chargalg_psy;
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struct ux500_charger *ac_chg;
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struct ux500_charger *usb_chg;
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struct abx500_chargalg_events events;
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struct workqueue_struct *chargalg_wq;
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struct delayed_work chargalg_periodic_work;
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struct delayed_work chargalg_wd_work;
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struct work_struct chargalg_work;
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struct hrtimer safety_timer;
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struct hrtimer maintenance_timer;
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struct kobject chargalg_kobject;
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};
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/*External charger prepare notifier*/
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BLOCKING_NOTIFIER_HEAD(charger_notifier_list);
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/* Main battery properties */
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static enum power_supply_property abx500_chargalg_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_HEALTH,
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};
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struct abx500_chargalg_sysfs_entry {
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struct attribute attr;
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ssize_t (*show)(struct abx500_chargalg *, char *);
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ssize_t (*store)(struct abx500_chargalg *, const char *, size_t);
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};
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/**
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* abx500_chargalg_safety_timer_expired() - Expiration of the safety timer
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* @timer: pointer to the hrtimer structure
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*
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* This function gets called when the safety timer for the charger
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* expires
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*/
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static enum hrtimer_restart
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abx500_chargalg_safety_timer_expired(struct hrtimer *timer)
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{
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struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg,
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safety_timer);
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dev_err(di->dev, "Safety timer expired\n");
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di->events.safety_timer_expired = true;
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/* Trigger execution of the algorithm instantly */
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queue_work(di->chargalg_wq, &di->chargalg_work);
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return HRTIMER_NORESTART;
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}
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/**
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* abx500_chargalg_maintenance_timer_expired() - Expiration of
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* the maintenance timer
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* @timer: pointer to the timer structure
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*
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* This function gets called when the maintenence timer
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* expires
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*/
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static enum hrtimer_restart
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abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer)
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{
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struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg,
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maintenance_timer);
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dev_dbg(di->dev, "Maintenance timer expired\n");
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di->events.maintenance_timer_expired = true;
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/* Trigger execution of the algorithm instantly */
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queue_work(di->chargalg_wq, &di->chargalg_work);
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return HRTIMER_NORESTART;
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}
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/**
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* abx500_chargalg_state_to() - Change charge state
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* @di: pointer to the abx500_chargalg structure
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*
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* This function gets called when a charge state change should occur
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*/
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static void abx500_chargalg_state_to(struct abx500_chargalg *di,
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enum abx500_chargalg_states state)
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{
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dev_dbg(di->dev,
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"State changed: %s (From state: [%d] %s =to=> [%d] %s )\n",
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di->charge_state == state ? "NO" : "YES",
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di->charge_state,
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states[di->charge_state],
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state,
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states[state]);
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di->charge_state = state;
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}
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static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di)
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{
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switch (di->charge_state) {
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case STATE_NORMAL:
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case STATE_MAINTENANCE_A:
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case STATE_MAINTENANCE_B:
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break;
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default:
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return 0;
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}
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if (di->chg_info.charger_type & USB_CHG) {
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return di->usb_chg->ops.check_enable(di->usb_chg,
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di->bm->bat_type[di->bm->batt_id].normal_vol_lvl,
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di->bm->bat_type[di->bm->batt_id].normal_cur_lvl);
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} else if ((di->chg_info.charger_type & AC_CHG) &&
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!(di->ac_chg->external)) {
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return di->ac_chg->ops.check_enable(di->ac_chg,
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di->bm->bat_type[di->bm->batt_id].normal_vol_lvl,
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di->bm->bat_type[di->bm->batt_id].normal_cur_lvl);
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}
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return 0;
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}
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/**
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* abx500_chargalg_check_charger_connection() - Check charger connection change
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* @di: pointer to the abx500_chargalg structure
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*
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* This function will check if there is a change in the charger connection
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* and change charge state accordingly. AC has precedence over USB.
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*/
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static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di)
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{
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if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg ||
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di->susp_status.suspended_change) {
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/*
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* Charger state changed or suspension
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* has changed since last update
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*/
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if ((di->chg_info.conn_chg & AC_CHG) &&
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!di->susp_status.ac_suspended) {
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dev_dbg(di->dev, "Charging source is AC\n");
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if (di->chg_info.charger_type != AC_CHG) {
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di->chg_info.charger_type = AC_CHG;
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abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
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}
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} else if ((di->chg_info.conn_chg & USB_CHG) &&
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!di->susp_status.usb_suspended) {
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dev_dbg(di->dev, "Charging source is USB\n");
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di->chg_info.charger_type = USB_CHG;
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abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
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} else if (di->chg_info.conn_chg &&
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(di->susp_status.ac_suspended ||
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di->susp_status.usb_suspended)) {
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dev_dbg(di->dev, "Charging is suspended\n");
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di->chg_info.charger_type = NO_CHG;
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abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT);
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} else {
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dev_dbg(di->dev, "Charging source is OFF\n");
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di->chg_info.charger_type = NO_CHG;
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abx500_chargalg_state_to(di, STATE_HANDHELD_INIT);
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}
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di->chg_info.prev_conn_chg = di->chg_info.conn_chg;
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di->susp_status.suspended_change = false;
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}
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return di->chg_info.conn_chg;
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}
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/**
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* abx500_chargalg_check_current_step_status() - Check charging current
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* step status.
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* @di: pointer to the abx500_chargalg structure
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*
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* This function will check if there is a change in the charging current step
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* and change charge state accordingly.
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*/
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static void abx500_chargalg_check_current_step_status
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(struct abx500_chargalg *di)
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{
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if (di->curr_status.curr_step_change)
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abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
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di->curr_status.curr_step_change = false;
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}
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/**
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* abx500_chargalg_start_safety_timer() - Start charging safety timer
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* @di: pointer to the abx500_chargalg structure
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*
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* The safety timer is used to avoid overcharging of old or bad batteries.
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* There are different timers for AC and USB
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*/
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static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di)
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{
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/* Charger-dependent expiration time in hours*/
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int timer_expiration = 0;
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switch (di->chg_info.charger_type) {
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case AC_CHG:
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timer_expiration = di->bm->main_safety_tmr_h;
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break;
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case USB_CHG:
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timer_expiration = di->bm->usb_safety_tmr_h;
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break;
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default:
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dev_err(di->dev, "Unknown charger to charge from\n");
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break;
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}
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di->events.safety_timer_expired = false;
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hrtimer_set_expires_range(&di->safety_timer,
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ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0),
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ktime_set(FIVE_MINUTES_IN_SECONDS, 0));
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hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL);
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}
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/**
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* abx500_chargalg_stop_safety_timer() - Stop charging safety timer
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* @di: pointer to the abx500_chargalg structure
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*
|
|
* The safety timer is stopped whenever the NORMAL state is exited
|
|
*/
|
|
static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di)
|
|
{
|
|
if (hrtimer_try_to_cancel(&di->safety_timer) >= 0)
|
|
di->events.safety_timer_expired = false;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @duration: duration of ther maintenance timer in hours
|
|
*
|
|
* The maintenance timer is used to maintain the charge in the battery once
|
|
* the battery is considered full. These timers are chosen to match the
|
|
* discharge curve of the battery
|
|
*/
|
|
static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di,
|
|
int duration)
|
|
{
|
|
hrtimer_set_expires_range(&di->maintenance_timer,
|
|
ktime_set(duration * ONE_HOUR_IN_SECONDS, 0),
|
|
ktime_set(FIVE_MINUTES_IN_SECONDS, 0));
|
|
di->events.maintenance_timer_expired = false;
|
|
hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* The maintenance timer is stopped whenever maintenance ends or when another
|
|
* state is entered
|
|
*/
|
|
static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di)
|
|
{
|
|
if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0)
|
|
di->events.maintenance_timer_expired = false;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_kick_watchdog() - Kick charger watchdog
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* The charger watchdog have to be kicked periodically whenever the charger is
|
|
* on, else the ABB will reset the system
|
|
*/
|
|
static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di)
|
|
{
|
|
/* Check if charger exists and kick watchdog if charging */
|
|
if (di->ac_chg && di->ac_chg->ops.kick_wd &&
|
|
di->chg_info.online_chg & AC_CHG) {
|
|
/*
|
|
* If AB charger watchdog expired, pm2xxx charging
|
|
* gets disabled. To be safe, kick both AB charger watchdog
|
|
* and pm2xxx watchdog.
|
|
*/
|
|
if (di->ac_chg->external &&
|
|
di->usb_chg && di->usb_chg->ops.kick_wd)
|
|
di->usb_chg->ops.kick_wd(di->usb_chg);
|
|
|
|
return di->ac_chg->ops.kick_wd(di->ac_chg);
|
|
}
|
|
else if (di->usb_chg && di->usb_chg->ops.kick_wd &&
|
|
di->chg_info.online_chg & USB_CHG)
|
|
return di->usb_chg->ops.kick_wd(di->usb_chg);
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_ac_en() - Turn on/off the AC charger
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @enable: charger on/off
|
|
* @vset: requested charger output voltage
|
|
* @iset: requested charger output current
|
|
*
|
|
* The AC charger will be turned on/off with the requested charge voltage and
|
|
* current
|
|
*/
|
|
static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable,
|
|
int vset, int iset)
|
|
{
|
|
static int abx500_chargalg_ex_ac_enable_toggle;
|
|
|
|
if (!di->ac_chg || !di->ac_chg->ops.enable)
|
|
return -ENXIO;
|
|
|
|
/* Select maximum of what both the charger and the battery supports */
|
|
if (di->ac_chg->max_out_volt)
|
|
vset = min(vset, di->ac_chg->max_out_volt);
|
|
if (di->ac_chg->max_out_curr)
|
|
iset = min(iset, di->ac_chg->max_out_curr);
|
|
|
|
di->chg_info.ac_iset = iset;
|
|
di->chg_info.ac_vset = vset;
|
|
|
|
/* Enable external charger */
|
|
if (enable && di->ac_chg->external &&
|
|
!abx500_chargalg_ex_ac_enable_toggle) {
|
|
blocking_notifier_call_chain(&charger_notifier_list,
|
|
0, di->dev);
|
|
abx500_chargalg_ex_ac_enable_toggle++;
|
|
}
|
|
|
|
return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_usb_en() - Turn on/off the USB charger
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @enable: charger on/off
|
|
* @vset: requested charger output voltage
|
|
* @iset: requested charger output current
|
|
*
|
|
* The USB charger will be turned on/off with the requested charge voltage and
|
|
* current
|
|
*/
|
|
static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable,
|
|
int vset, int iset)
|
|
{
|
|
if (!di->usb_chg || !di->usb_chg->ops.enable)
|
|
return -ENXIO;
|
|
|
|
/* Select maximum of what both the charger and the battery supports */
|
|
if (di->usb_chg->max_out_volt)
|
|
vset = min(vset, di->usb_chg->max_out_volt);
|
|
if (di->usb_chg->max_out_curr)
|
|
iset = min(iset, di->usb_chg->max_out_curr);
|
|
|
|
di->chg_info.usb_iset = iset;
|
|
di->chg_info.usb_vset = vset;
|
|
|
|
return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset);
|
|
}
|
|
|
|
/**
|
|
* ab8540_chargalg_usb_pp_en() - Enable/ disable USB power path
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @enable: power path enable/disable
|
|
*
|
|
* The USB power path will be enable/ disable
|
|
*/
|
|
static int ab8540_chargalg_usb_pp_en(struct abx500_chargalg *di, bool enable)
|
|
{
|
|
if (!di->usb_chg || !di->usb_chg->ops.pp_enable)
|
|
return -ENXIO;
|
|
|
|
return di->usb_chg->ops.pp_enable(di->usb_chg, enable);
|
|
}
|
|
|
|
/**
|
|
* ab8540_chargalg_usb_pre_chg_en() - Enable/ disable USB pre-charge
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @enable: USB pre-charge enable/disable
|
|
*
|
|
* The USB USB pre-charge will be enable/ disable
|
|
*/
|
|
static int ab8540_chargalg_usb_pre_chg_en(struct abx500_chargalg *di,
|
|
bool enable)
|
|
{
|
|
if (!di->usb_chg || !di->usb_chg->ops.pre_chg_enable)
|
|
return -ENXIO;
|
|
|
|
return di->usb_chg->ops.pre_chg_enable(di->usb_chg, enable);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_update_chg_curr() - Update charger current
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @iset: requested charger output current
|
|
*
|
|
* The charger output current will be updated for the charger
|
|
* that is currently in use
|
|
*/
|
|
static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di,
|
|
int iset)
|
|
{
|
|
/* Check if charger exists and update current if charging */
|
|
if (di->ac_chg && di->ac_chg->ops.update_curr &&
|
|
di->chg_info.charger_type & AC_CHG) {
|
|
/*
|
|
* Select maximum of what both the charger
|
|
* and the battery supports
|
|
*/
|
|
if (di->ac_chg->max_out_curr)
|
|
iset = min(iset, di->ac_chg->max_out_curr);
|
|
|
|
di->chg_info.ac_iset = iset;
|
|
|
|
return di->ac_chg->ops.update_curr(di->ac_chg, iset);
|
|
} else if (di->usb_chg && di->usb_chg->ops.update_curr &&
|
|
di->chg_info.charger_type & USB_CHG) {
|
|
/*
|
|
* Select maximum of what both the charger
|
|
* and the battery supports
|
|
*/
|
|
if (di->usb_chg->max_out_curr)
|
|
iset = min(iset, di->usb_chg->max_out_curr);
|
|
|
|
di->chg_info.usb_iset = iset;
|
|
|
|
return di->usb_chg->ops.update_curr(di->usb_chg, iset);
|
|
}
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_stop_charging() - Stop charging
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* This function is called from any state where charging should be stopped.
|
|
* All charging is disabled and all status parameters and timers are changed
|
|
* accordingly
|
|
*/
|
|
static void abx500_chargalg_stop_charging(struct abx500_chargalg *di)
|
|
{
|
|
abx500_chargalg_ac_en(di, false, 0, 0);
|
|
abx500_chargalg_usb_en(di, false, 0, 0);
|
|
abx500_chargalg_stop_safety_timer(di);
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
di->maintenance_chg = false;
|
|
cancel_delayed_work(&di->chargalg_wd_work);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_hold_charging() - Pauses charging
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* This function is called in the case where maintenance charging has been
|
|
* disabled and instead a battery voltage mode is entered to check when the
|
|
* battery voltage has reached a certain recharge voltage
|
|
*/
|
|
static void abx500_chargalg_hold_charging(struct abx500_chargalg *di)
|
|
{
|
|
abx500_chargalg_ac_en(di, false, 0, 0);
|
|
abx500_chargalg_usb_en(di, false, 0, 0);
|
|
abx500_chargalg_stop_safety_timer(di);
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
di->maintenance_chg = false;
|
|
cancel_delayed_work(&di->chargalg_wd_work);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_start_charging() - Start the charger
|
|
* @di: pointer to the abx500_chargalg structure
|
|
* @vset: requested charger output voltage
|
|
* @iset: requested charger output current
|
|
*
|
|
* A charger will be enabled depending on the requested charger type that was
|
|
* detected previously.
|
|
*/
|
|
static void abx500_chargalg_start_charging(struct abx500_chargalg *di,
|
|
int vset, int iset)
|
|
{
|
|
switch (di->chg_info.charger_type) {
|
|
case AC_CHG:
|
|
dev_dbg(di->dev,
|
|
"AC parameters: Vset %d, Ich %d\n", vset, iset);
|
|
abx500_chargalg_usb_en(di, false, 0, 0);
|
|
abx500_chargalg_ac_en(di, true, vset, iset);
|
|
break;
|
|
|
|
case USB_CHG:
|
|
dev_dbg(di->dev,
|
|
"USB parameters: Vset %d, Ich %d\n", vset, iset);
|
|
abx500_chargalg_ac_en(di, false, 0, 0);
|
|
abx500_chargalg_usb_en(di, true, vset, iset);
|
|
break;
|
|
|
|
default:
|
|
dev_err(di->dev, "Unknown charger to charge from\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_check_temp() - Check battery temperature ranges
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* The battery temperature is checked against the predefined limits and the
|
|
* charge state is changed accordingly
|
|
*/
|
|
static void abx500_chargalg_check_temp(struct abx500_chargalg *di)
|
|
{
|
|
if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) &&
|
|
di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) {
|
|
/* Temp OK! */
|
|
di->events.btemp_underover = false;
|
|
di->events.btemp_lowhigh = false;
|
|
di->t_hyst_norm = 0;
|
|
di->t_hyst_lowhigh = 0;
|
|
} else {
|
|
if (((di->batt_data.temp >= di->bm->temp_high) &&
|
|
(di->batt_data.temp <
|
|
(di->bm->temp_over - di->t_hyst_lowhigh))) ||
|
|
((di->batt_data.temp >
|
|
(di->bm->temp_under + di->t_hyst_lowhigh)) &&
|
|
(di->batt_data.temp <= di->bm->temp_low))) {
|
|
/* TEMP minor!!!!! */
|
|
di->events.btemp_underover = false;
|
|
di->events.btemp_lowhigh = true;
|
|
di->t_hyst_norm = di->bm->temp_hysteresis;
|
|
di->t_hyst_lowhigh = 0;
|
|
} else if (di->batt_data.temp <= di->bm->temp_under ||
|
|
di->batt_data.temp >= di->bm->temp_over) {
|
|
/* TEMP major!!!!! */
|
|
di->events.btemp_underover = true;
|
|
di->events.btemp_lowhigh = false;
|
|
di->t_hyst_norm = 0;
|
|
di->t_hyst_lowhigh = di->bm->temp_hysteresis;
|
|
} else {
|
|
/* Within hysteresis */
|
|
dev_dbg(di->dev, "Within hysteresis limit temp: %d "
|
|
"hyst_lowhigh %d, hyst normal %d\n",
|
|
di->batt_data.temp, di->t_hyst_lowhigh,
|
|
di->t_hyst_norm);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_check_charger_voltage() - Check charger voltage
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* Charger voltage is checked against maximum limit
|
|
*/
|
|
static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di)
|
|
{
|
|
if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max)
|
|
di->chg_info.usb_chg_ok = false;
|
|
else
|
|
di->chg_info.usb_chg_ok = true;
|
|
|
|
if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max)
|
|
di->chg_info.ac_chg_ok = false;
|
|
else
|
|
di->chg_info.ac_chg_ok = true;
|
|
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* End-of-charge criteria is fulfilled when the battery voltage is above a
|
|
* certain limit and the battery current is below a certain limit for a
|
|
* predefined number of consecutive seconds. If true, the battery is full
|
|
*/
|
|
static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di)
|
|
{
|
|
if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING &&
|
|
di->charge_state == STATE_NORMAL &&
|
|
!di->maintenance_chg && (di->batt_data.volt >=
|
|
di->bm->bat_type[di->bm->batt_id].termination_vol ||
|
|
di->events.usb_cv_active || di->events.ac_cv_active) &&
|
|
di->batt_data.avg_curr <
|
|
di->bm->bat_type[di->bm->batt_id].termination_curr &&
|
|
di->batt_data.avg_curr > 0) {
|
|
if (++di->eoc_cnt >= EOC_COND_CNT) {
|
|
di->eoc_cnt = 0;
|
|
if ((di->chg_info.charger_type & USB_CHG) &&
|
|
(di->usb_chg->power_path))
|
|
ab8540_chargalg_usb_pp_en(di, true);
|
|
di->charge_status = POWER_SUPPLY_STATUS_FULL;
|
|
di->maintenance_chg = true;
|
|
dev_dbg(di->dev, "EOC reached!\n");
|
|
power_supply_changed(&di->chargalg_psy);
|
|
} else {
|
|
dev_dbg(di->dev,
|
|
" EOC limit reached for the %d"
|
|
" time, out of %d before EOC\n",
|
|
di->eoc_cnt,
|
|
EOC_COND_CNT);
|
|
}
|
|
} else {
|
|
di->eoc_cnt = 0;
|
|
}
|
|
}
|
|
|
|
static void init_maxim_chg_curr(struct abx500_chargalg *di)
|
|
{
|
|
di->ccm.original_iset =
|
|
di->bm->bat_type[di->bm->batt_id].normal_cur_lvl;
|
|
di->ccm.current_iset =
|
|
di->bm->bat_type[di->bm->batt_id].normal_cur_lvl;
|
|
di->ccm.test_delta_i = di->bm->maxi->charger_curr_step;
|
|
di->ccm.max_current = di->bm->maxi->chg_curr;
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.level = 0;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_chg_curr_maxim - increases the charger current to
|
|
* compensate for the system load
|
|
* @di pointer to the abx500_chargalg structure
|
|
*
|
|
* This maximization function is used to raise the charger current to get the
|
|
* battery current as close to the optimal value as possible. The battery
|
|
* current during charging is affected by the system load
|
|
*/
|
|
static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di)
|
|
{
|
|
int delta_i;
|
|
|
|
if (!di->bm->maxi->ena_maxi)
|
|
return MAXIM_RET_NOACTION;
|
|
|
|
delta_i = di->ccm.original_iset - di->batt_data.inst_curr;
|
|
|
|
if (di->events.vbus_collapsed) {
|
|
dev_dbg(di->dev, "Charger voltage has collapsed %d\n",
|
|
di->ccm.wait_cnt);
|
|
if (di->ccm.wait_cnt == 0) {
|
|
dev_dbg(di->dev, "lowering current\n");
|
|
di->ccm.wait_cnt++;
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.max_current =
|
|
di->ccm.current_iset - di->ccm.test_delta_i;
|
|
di->ccm.current_iset = di->ccm.max_current;
|
|
di->ccm.level--;
|
|
return MAXIM_RET_CHANGE;
|
|
} else {
|
|
dev_dbg(di->dev, "waiting\n");
|
|
/* Let's go in here twice before lowering curr again */
|
|
di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3;
|
|
return MAXIM_RET_NOACTION;
|
|
}
|
|
}
|
|
|
|
di->ccm.wait_cnt = 0;
|
|
|
|
if ((di->batt_data.inst_curr > di->ccm.original_iset)) {
|
|
dev_dbg(di->dev, " Maximization Ibat (%dmA) too high"
|
|
" (limit %dmA) (current iset: %dmA)!\n",
|
|
di->batt_data.inst_curr, di->ccm.original_iset,
|
|
di->ccm.current_iset);
|
|
|
|
if (di->ccm.current_iset == di->ccm.original_iset)
|
|
return MAXIM_RET_NOACTION;
|
|
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.current_iset = di->ccm.original_iset;
|
|
di->ccm.level = 0;
|
|
|
|
return MAXIM_RET_IBAT_TOO_HIGH;
|
|
}
|
|
|
|
if (delta_i > di->ccm.test_delta_i &&
|
|
(di->ccm.current_iset + di->ccm.test_delta_i) <
|
|
di->ccm.max_current) {
|
|
if (di->ccm.condition_cnt-- == 0) {
|
|
/* Increse the iset with cco.test_delta_i */
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
di->ccm.current_iset += di->ccm.test_delta_i;
|
|
di->ccm.level++;
|
|
dev_dbg(di->dev, " Maximization needed, increase"
|
|
" with %d mA to %dmA (Optimal ibat: %d)"
|
|
" Level %d\n",
|
|
di->ccm.test_delta_i,
|
|
di->ccm.current_iset,
|
|
di->ccm.original_iset,
|
|
di->ccm.level);
|
|
return MAXIM_RET_CHANGE;
|
|
} else {
|
|
return MAXIM_RET_NOACTION;
|
|
}
|
|
} else {
|
|
di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
|
|
return MAXIM_RET_NOACTION;
|
|
}
|
|
}
|
|
|
|
static void handle_maxim_chg_curr(struct abx500_chargalg *di)
|
|
{
|
|
enum maxim_ret ret;
|
|
int result;
|
|
|
|
ret = abx500_chargalg_chg_curr_maxim(di);
|
|
switch (ret) {
|
|
case MAXIM_RET_CHANGE:
|
|
result = abx500_chargalg_update_chg_curr(di,
|
|
di->ccm.current_iset);
|
|
if (result)
|
|
dev_err(di->dev, "failed to set chg curr\n");
|
|
break;
|
|
case MAXIM_RET_IBAT_TOO_HIGH:
|
|
result = abx500_chargalg_update_chg_curr(di,
|
|
di->bm->bat_type[di->bm->batt_id].normal_cur_lvl);
|
|
if (result)
|
|
dev_err(di->dev, "failed to set chg curr\n");
|
|
break;
|
|
|
|
case MAXIM_RET_NOACTION:
|
|
default:
|
|
/* Do nothing..*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data)
|
|
{
|
|
struct power_supply *psy;
|
|
struct power_supply *ext;
|
|
struct abx500_chargalg *di;
|
|
union power_supply_propval ret;
|
|
int i, j;
|
|
bool psy_found = false;
|
|
bool capacity_updated = false;
|
|
|
|
psy = (struct power_supply *)data;
|
|
ext = dev_get_drvdata(dev);
|
|
di = to_abx500_chargalg_device_info(psy);
|
|
/* For all psy where the driver name appears in any supplied_to */
|
|
for (i = 0; i < ext->num_supplicants; i++) {
|
|
if (!strcmp(ext->supplied_to[i], psy->name))
|
|
psy_found = true;
|
|
}
|
|
if (!psy_found)
|
|
return 0;
|
|
|
|
/*
|
|
* If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its
|
|
* property because of handling that sysfs entry on its own, this is
|
|
* the place to get the battery capacity.
|
|
*/
|
|
if (!ext->get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) {
|
|
di->batt_data.percent = ret.intval;
|
|
capacity_updated = true;
|
|
}
|
|
|
|
/* Go through all properties for the psy */
|
|
for (j = 0; j < ext->num_properties; j++) {
|
|
enum power_supply_property prop;
|
|
prop = ext->properties[j];
|
|
|
|
/* Initialize chargers if not already done */
|
|
if (!di->ac_chg &&
|
|
ext->type == POWER_SUPPLY_TYPE_MAINS)
|
|
di->ac_chg = psy_to_ux500_charger(ext);
|
|
else if (!di->usb_chg &&
|
|
ext->type == POWER_SUPPLY_TYPE_USB)
|
|
di->usb_chg = psy_to_ux500_charger(ext);
|
|
|
|
if (ext->get_property(ext, prop, &ret))
|
|
continue;
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
/* Battery present */
|
|
if (ret.intval)
|
|
di->events.batt_rem = false;
|
|
/* Battery removed */
|
|
else
|
|
di->events.batt_rem = true;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AC disconnected */
|
|
if (!ret.intval &&
|
|
(di->chg_info.conn_chg & AC_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg &= ~AC_CHG;
|
|
}
|
|
/* AC connected */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.conn_chg & AC_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg |= AC_CHG;
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* USB disconnected */
|
|
if (!ret.intval &&
|
|
(di->chg_info.conn_chg & USB_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg &= ~USB_CHG;
|
|
}
|
|
/* USB connected */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.conn_chg & USB_CHG)) {
|
|
di->chg_info.prev_conn_chg =
|
|
di->chg_info.conn_chg;
|
|
di->chg_info.conn_chg |= USB_CHG;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AC offline */
|
|
if (!ret.intval &&
|
|
(di->chg_info.online_chg & AC_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg &= ~AC_CHG;
|
|
}
|
|
/* AC online */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.online_chg & AC_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg |= AC_CHG;
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, 0);
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* USB offline */
|
|
if (!ret.intval &&
|
|
(di->chg_info.online_chg & USB_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg &= ~USB_CHG;
|
|
}
|
|
/* USB online */
|
|
else if (ret.intval &&
|
|
!(di->chg_info.online_chg & USB_CHG)) {
|
|
di->chg_info.prev_online_chg =
|
|
di->chg_info.online_chg;
|
|
di->chg_info.online_chg |= USB_CHG;
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, 0);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
switch (ret.intval) {
|
|
case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
|
|
di->events.mainextchnotok = true;
|
|
di->events.main_thermal_prot = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_DEAD:
|
|
di->events.ac_wd_expired = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.main_thermal_prot = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_COLD:
|
|
case POWER_SUPPLY_HEALTH_OVERHEAT:
|
|
di->events.main_thermal_prot = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
|
|
di->events.main_ovv = true;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_thermal_prot = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_GOOD:
|
|
di->events.main_thermal_prot = false;
|
|
di->events.mainextchnotok = false;
|
|
di->events.main_ovv = false;
|
|
di->events.ac_wd_expired = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
switch (ret.intval) {
|
|
case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
|
|
di->events.usbchargernotok = true;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_DEAD:
|
|
di->events.usb_wd_expired = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_COLD:
|
|
case POWER_SUPPLY_HEALTH_OVERHEAT:
|
|
di->events.usb_thermal_prot = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
|
|
di->events.vbus_ovv = true;
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
case POWER_SUPPLY_HEALTH_GOOD:
|
|
di->events.usbchargernotok = false;
|
|
di->events.usb_thermal_prot = false;
|
|
di->events.vbus_ovv = false;
|
|
di->events.usb_wd_expired = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.volt = ret.intval / 1000;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
di->chg_info.ac_volt = ret.intval / 1000;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
di->chg_info.usb_volt = ret.intval / 1000;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AVG is used to indicate when we are
|
|
* in CV mode */
|
|
if (ret.intval)
|
|
di->events.ac_cv_active = true;
|
|
else
|
|
di->events.ac_cv_active = false;
|
|
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* AVG is used to indicate when we are
|
|
* in CV mode */
|
|
if (ret.intval)
|
|
di->events.usb_cv_active = true;
|
|
else
|
|
di->events.usb_cv_active = false;
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
if (ret.intval)
|
|
di->events.batt_unknown = false;
|
|
else
|
|
di->events.batt_unknown = true;
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
di->batt_data.temp = ret.intval / 10;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
di->chg_info.ac_curr =
|
|
ret.intval / 1000;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
di->chg_info.usb_curr =
|
|
ret.intval / 1000;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.inst_curr = ret.intval / 1000;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_AVG:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->batt_data.avg_curr = ret.intval / 1000;
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
if (ret.intval)
|
|
di->events.vbus_collapsed = true;
|
|
else
|
|
di->events.vbus_collapsed = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
if (!capacity_updated)
|
|
di->batt_data.percent = ret.intval;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_external_power_changed() - callback for power supply changes
|
|
* @psy: pointer to the structure power_supply
|
|
*
|
|
* This function is the entry point of the pointer external_power_changed
|
|
* of the structure power_supply.
|
|
* This function gets executed when there is a change in any external power
|
|
* supply that this driver needs to be notified of.
|
|
*/
|
|
static void abx500_chargalg_external_power_changed(struct power_supply *psy)
|
|
{
|
|
struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy);
|
|
|
|
/*
|
|
* Trigger execution of the algorithm instantly and read
|
|
* all power_supply properties there instead
|
|
*/
|
|
queue_work(di->chargalg_wq, &di->chargalg_work);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_algorithm() - Main function for the algorithm
|
|
* @di: pointer to the abx500_chargalg structure
|
|
*
|
|
* This is the main control function for the charging algorithm.
|
|
* It is called periodically or when something happens that will
|
|
* trigger a state change
|
|
*/
|
|
static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
|
|
{
|
|
int charger_status;
|
|
int ret;
|
|
int curr_step_lvl;
|
|
|
|
/* Collect data from all power_supply class devices */
|
|
class_for_each_device(power_supply_class, NULL,
|
|
&di->chargalg_psy, abx500_chargalg_get_ext_psy_data);
|
|
|
|
abx500_chargalg_end_of_charge(di);
|
|
abx500_chargalg_check_temp(di);
|
|
abx500_chargalg_check_charger_voltage(di);
|
|
|
|
charger_status = abx500_chargalg_check_charger_connection(di);
|
|
abx500_chargalg_check_current_step_status(di);
|
|
|
|
if (is_ab8500(di->parent)) {
|
|
ret = abx500_chargalg_check_charger_enable(di);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "Checking charger is enabled error"
|
|
": Returned Value %d\n", ret);
|
|
}
|
|
|
|
/*
|
|
* First check if we have a charger connected.
|
|
* Also we don't allow charging of unknown batteries if configured
|
|
* this way
|
|
*/
|
|
if (!charger_status ||
|
|
(di->events.batt_unknown && !di->bm->chg_unknown_bat)) {
|
|
if (di->charge_state != STATE_HANDHELD) {
|
|
di->events.safety_timer_expired = false;
|
|
abx500_chargalg_state_to(di, STATE_HANDHELD_INIT);
|
|
}
|
|
}
|
|
|
|
/* If suspended, we should not continue checking the flags */
|
|
else if (di->charge_state == STATE_SUSPENDED_INIT ||
|
|
di->charge_state == STATE_SUSPENDED) {
|
|
/* We don't do anything here, just don,t continue */
|
|
}
|
|
|
|
/* Safety timer expiration */
|
|
else if (di->events.safety_timer_expired) {
|
|
if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED)
|
|
abx500_chargalg_state_to(di,
|
|
STATE_SAFETY_TIMER_EXPIRED_INIT);
|
|
}
|
|
/*
|
|
* Check if any interrupts has occured
|
|
* that will prevent us from charging
|
|
*/
|
|
|
|
/* Battery removed */
|
|
else if (di->events.batt_rem) {
|
|
if (di->charge_state != STATE_BATT_REMOVED)
|
|
abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT);
|
|
}
|
|
/* Main or USB charger not ok. */
|
|
else if (di->events.mainextchnotok || di->events.usbchargernotok) {
|
|
/*
|
|
* If vbus_collapsed is set, we have to lower the charger
|
|
* current, which is done in the normal state below
|
|
*/
|
|
if (di->charge_state != STATE_CHG_NOT_OK &&
|
|
!di->events.vbus_collapsed)
|
|
abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT);
|
|
}
|
|
/* VBUS, Main or VBAT OVV. */
|
|
else if (di->events.vbus_ovv ||
|
|
di->events.main_ovv ||
|
|
di->events.batt_ovv ||
|
|
!di->chg_info.usb_chg_ok ||
|
|
!di->chg_info.ac_chg_ok) {
|
|
if (di->charge_state != STATE_OVV_PROTECT)
|
|
abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT);
|
|
}
|
|
/* USB Thermal, stop charging */
|
|
else if (di->events.main_thermal_prot ||
|
|
di->events.usb_thermal_prot) {
|
|
if (di->charge_state != STATE_HW_TEMP_PROTECT)
|
|
abx500_chargalg_state_to(di,
|
|
STATE_HW_TEMP_PROTECT_INIT);
|
|
}
|
|
/* Battery temp over/under */
|
|
else if (di->events.btemp_underover) {
|
|
if (di->charge_state != STATE_TEMP_UNDEROVER)
|
|
abx500_chargalg_state_to(di,
|
|
STATE_TEMP_UNDEROVER_INIT);
|
|
}
|
|
/* Watchdog expired */
|
|
else if (di->events.ac_wd_expired ||
|
|
di->events.usb_wd_expired) {
|
|
if (di->charge_state != STATE_WD_EXPIRED)
|
|
abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT);
|
|
}
|
|
/* Battery temp high/low */
|
|
else if (di->events.btemp_lowhigh) {
|
|
if (di->charge_state != STATE_TEMP_LOWHIGH)
|
|
abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT);
|
|
}
|
|
|
|
dev_dbg(di->dev,
|
|
"[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d "
|
|
"State %s Active_chg %d Chg_status %d AC %d USB %d "
|
|
"AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d "
|
|
"USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n",
|
|
di->batt_data.volt,
|
|
di->batt_data.avg_curr,
|
|
di->batt_data.inst_curr,
|
|
di->batt_data.temp,
|
|
di->batt_data.percent,
|
|
di->maintenance_chg,
|
|
states[di->charge_state],
|
|
di->chg_info.charger_type,
|
|
di->charge_status,
|
|
di->chg_info.conn_chg & AC_CHG,
|
|
di->chg_info.conn_chg & USB_CHG,
|
|
di->chg_info.online_chg & AC_CHG,
|
|
di->chg_info.online_chg & USB_CHG,
|
|
di->events.ac_cv_active,
|
|
di->events.usb_cv_active,
|
|
di->chg_info.ac_curr,
|
|
di->chg_info.usb_curr,
|
|
di->chg_info.ac_vset,
|
|
di->chg_info.ac_iset,
|
|
di->chg_info.usb_vset,
|
|
di->chg_info.usb_iset);
|
|
|
|
switch (di->charge_state) {
|
|
case STATE_HANDHELD_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
abx500_chargalg_state_to(di, STATE_HANDHELD);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_HANDHELD:
|
|
break;
|
|
|
|
case STATE_SUSPENDED_INIT:
|
|
if (di->susp_status.ac_suspended)
|
|
abx500_chargalg_ac_en(di, false, 0, 0);
|
|
if (di->susp_status.usb_suspended)
|
|
abx500_chargalg_usb_en(di, false, 0, 0);
|
|
abx500_chargalg_stop_safety_timer(di);
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
di->maintenance_chg = false;
|
|
abx500_chargalg_state_to(di, STATE_SUSPENDED);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_SUSPENDED:
|
|
/* CHARGING is suspended */
|
|
break;
|
|
|
|
case STATE_BATT_REMOVED_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_BATT_REMOVED);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_BATT_REMOVED:
|
|
if (!di->events.batt_rem)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_HW_TEMP_PROTECT_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_HW_TEMP_PROTECT:
|
|
if (!di->events.main_thermal_prot &&
|
|
!di->events.usb_thermal_prot)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_OVV_PROTECT_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_OVV_PROTECT);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_OVV_PROTECT:
|
|
if (!di->events.vbus_ovv &&
|
|
!di->events.main_ovv &&
|
|
!di->events.batt_ovv &&
|
|
di->chg_info.usb_chg_ok &&
|
|
di->chg_info.ac_chg_ok)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_CHG_NOT_OK_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_CHG_NOT_OK);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_CHG_NOT_OK:
|
|
if (!di->events.mainextchnotok &&
|
|
!di->events.usbchargernotok)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_SAFETY_TIMER_EXPIRED_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_SAFETY_TIMER_EXPIRED:
|
|
/* We exit this state when charger is removed */
|
|
break;
|
|
|
|
case STATE_NORMAL_INIT:
|
|
if ((di->chg_info.charger_type & USB_CHG) &&
|
|
di->usb_chg->power_path) {
|
|
if (di->batt_data.volt >
|
|
(di->bm->fg_params->lowbat_threshold +
|
|
BAT_PLUS_MARGIN)) {
|
|
ab8540_chargalg_usb_pre_chg_en(di, false);
|
|
ab8540_chargalg_usb_pp_en(di, false);
|
|
} else {
|
|
ab8540_chargalg_usb_pp_en(di, true);
|
|
ab8540_chargalg_usb_pre_chg_en(di, true);
|
|
abx500_chargalg_state_to(di,
|
|
STATE_USB_PP_PRE_CHARGE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (di->curr_status.curr_step == CHARGALG_CURR_STEP_LOW)
|
|
abx500_chargalg_stop_charging(di);
|
|
else {
|
|
curr_step_lvl = di->bm->bat_type[
|
|
di->bm->batt_id].normal_cur_lvl
|
|
* di->curr_status.curr_step
|
|
/ CHARGALG_CURR_STEP_HIGH;
|
|
abx500_chargalg_start_charging(di,
|
|
di->bm->bat_type[di->bm->batt_id]
|
|
.normal_vol_lvl, curr_step_lvl);
|
|
}
|
|
|
|
abx500_chargalg_state_to(di, STATE_NORMAL);
|
|
abx500_chargalg_start_safety_timer(di);
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
init_maxim_chg_curr(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
di->eoc_cnt = 0;
|
|
di->maintenance_chg = false;
|
|
power_supply_changed(&di->chargalg_psy);
|
|
|
|
break;
|
|
|
|
case STATE_USB_PP_PRE_CHARGE:
|
|
if (di->batt_data.volt >
|
|
(di->bm->fg_params->lowbat_threshold +
|
|
BAT_PLUS_MARGIN))
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_NORMAL:
|
|
handle_maxim_chg_curr(di);
|
|
if (di->charge_status == POWER_SUPPLY_STATUS_FULL &&
|
|
di->maintenance_chg) {
|
|
if (di->bm->no_maintenance)
|
|
abx500_chargalg_state_to(di,
|
|
STATE_WAIT_FOR_RECHARGE_INIT);
|
|
else
|
|
abx500_chargalg_state_to(di,
|
|
STATE_MAINTENANCE_A_INIT);
|
|
}
|
|
break;
|
|
|
|
/* This state will be used when the maintenance state is disabled */
|
|
case STATE_WAIT_FOR_RECHARGE_INIT:
|
|
abx500_chargalg_hold_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_WAIT_FOR_RECHARGE:
|
|
if (di->batt_data.percent <=
|
|
di->bm->bat_type[di->bm->batt_id].
|
|
recharge_cap)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_MAINTENANCE_A_INIT:
|
|
abx500_chargalg_stop_safety_timer(di);
|
|
abx500_chargalg_start_maintenance_timer(di,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_a_chg_timer_h);
|
|
abx500_chargalg_start_charging(di,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_a_vol_lvl,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_a_cur_lvl);
|
|
abx500_chargalg_state_to(di, STATE_MAINTENANCE_A);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
/* Intentional fallthrough*/
|
|
|
|
case STATE_MAINTENANCE_A:
|
|
if (di->events.maintenance_timer_expired) {
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT);
|
|
}
|
|
break;
|
|
|
|
case STATE_MAINTENANCE_B_INIT:
|
|
abx500_chargalg_start_maintenance_timer(di,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_b_chg_timer_h);
|
|
abx500_chargalg_start_charging(di,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_b_vol_lvl,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].maint_b_cur_lvl);
|
|
abx500_chargalg_state_to(di, STATE_MAINTENANCE_B);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
/* Intentional fallthrough*/
|
|
|
|
case STATE_MAINTENANCE_B:
|
|
if (di->events.maintenance_timer_expired) {
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
}
|
|
break;
|
|
|
|
case STATE_TEMP_LOWHIGH_INIT:
|
|
abx500_chargalg_start_charging(di,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].low_high_vol_lvl,
|
|
di->bm->bat_type[
|
|
di->bm->batt_id].low_high_cur_lvl);
|
|
abx500_chargalg_stop_maintenance_timer(di);
|
|
di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH);
|
|
power_supply_changed(&di->chargalg_psy);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_TEMP_LOWHIGH:
|
|
if (!di->events.btemp_lowhigh)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_WD_EXPIRED_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_WD_EXPIRED);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_WD_EXPIRED:
|
|
if (!di->events.ac_wd_expired &&
|
|
!di->events.usb_wd_expired)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
|
|
case STATE_TEMP_UNDEROVER_INIT:
|
|
abx500_chargalg_stop_charging(di);
|
|
abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER);
|
|
/* Intentional fallthrough */
|
|
|
|
case STATE_TEMP_UNDEROVER:
|
|
if (!di->events.btemp_underover)
|
|
abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
|
|
break;
|
|
}
|
|
|
|
/* Start charging directly if the new state is a charge state */
|
|
if (di->charge_state == STATE_NORMAL_INIT ||
|
|
di->charge_state == STATE_MAINTENANCE_A_INIT ||
|
|
di->charge_state == STATE_MAINTENANCE_B_INIT)
|
|
queue_work(di->chargalg_wq, &di->chargalg_work);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_periodic_work() - Periodic work for the algorithm
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for the charging algorithm
|
|
*/
|
|
static void abx500_chargalg_periodic_work(struct work_struct *work)
|
|
{
|
|
struct abx500_chargalg *di = container_of(work,
|
|
struct abx500_chargalg, chargalg_periodic_work.work);
|
|
|
|
abx500_chargalg_algorithm(di);
|
|
|
|
/*
|
|
* If a charger is connected then the battery has to be monitored
|
|
* frequently, else the work can be delayed.
|
|
*/
|
|
if (di->chg_info.conn_chg)
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_periodic_work,
|
|
di->bm->interval_charging * HZ);
|
|
else
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_periodic_work,
|
|
di->bm->interval_not_charging * HZ);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_wd_work() - periodic work to kick the charger watchdog
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for kicking the charger watchdog
|
|
*/
|
|
static void abx500_chargalg_wd_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
struct abx500_chargalg *di = container_of(work,
|
|
struct abx500_chargalg, chargalg_wd_work.work);
|
|
|
|
dev_dbg(di->dev, "abx500_chargalg_wd_work\n");
|
|
|
|
ret = abx500_chargalg_kick_watchdog(di);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "failed to kick watchdog\n");
|
|
|
|
queue_delayed_work(di->chargalg_wq,
|
|
&di->chargalg_wd_work, CHG_WD_INTERVAL);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_work() - Work to run the charging algorithm instantly
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for calling the charging algorithm
|
|
*/
|
|
static void abx500_chargalg_work(struct work_struct *work)
|
|
{
|
|
struct abx500_chargalg *di = container_of(work,
|
|
struct abx500_chargalg, chargalg_work);
|
|
|
|
abx500_chargalg_algorithm(di);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_get_property() - get the chargalg properties
|
|
* @psy: pointer to the power_supply structure
|
|
* @psp: pointer to the power_supply_property structure
|
|
* @val: pointer to the power_supply_propval union
|
|
*
|
|
* This function gets called when an application tries to get the
|
|
* chargalg properties by reading the sysfs files.
|
|
* status: charging/discharging/full/unknown
|
|
* health: health of the battery
|
|
* Returns error code in case of failure else 0 on success
|
|
*/
|
|
static int abx500_chargalg_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct abx500_chargalg *di;
|
|
|
|
di = to_abx500_chargalg_device_info(psy);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
val->intval = di->charge_status;
|
|
break;
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
if (di->events.batt_ovv) {
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
|
} else if (di->events.btemp_underover) {
|
|
if (di->batt_data.temp <= di->bm->temp_under)
|
|
val->intval = POWER_SUPPLY_HEALTH_COLD;
|
|
else
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
|
|
} else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED ||
|
|
di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) {
|
|
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
|
|
} else {
|
|
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Exposure to the sysfs interface */
|
|
|
|
static ssize_t abx500_chargalg_curr_step_show(struct abx500_chargalg *di,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", di->curr_status.curr_step);
|
|
}
|
|
|
|
static ssize_t abx500_chargalg_curr_step_store(struct abx500_chargalg *di,
|
|
const char *buf, size_t length)
|
|
{
|
|
long int param;
|
|
int ret;
|
|
|
|
ret = kstrtol(buf, 10, ¶m);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
di->curr_status.curr_step = param;
|
|
if (di->curr_status.curr_step >= CHARGALG_CURR_STEP_LOW &&
|
|
di->curr_status.curr_step <= CHARGALG_CURR_STEP_HIGH) {
|
|
di->curr_status.curr_step_change = true;
|
|
queue_work(di->chargalg_wq, &di->chargalg_work);
|
|
} else
|
|
dev_info(di->dev, "Wrong current step\n"
|
|
"Enter 0. Disable AC/USB Charging\n"
|
|
"1--100. Set AC/USB charging current step\n"
|
|
"100. Enable AC/USB Charging\n");
|
|
|
|
return strlen(buf);
|
|
}
|
|
|
|
|
|
static ssize_t abx500_chargalg_en_show(struct abx500_chargalg *di,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n",
|
|
di->susp_status.ac_suspended &&
|
|
di->susp_status.usb_suspended);
|
|
}
|
|
|
|
static ssize_t abx500_chargalg_en_store(struct abx500_chargalg *di,
|
|
const char *buf, size_t length)
|
|
{
|
|
long int param;
|
|
int ac_usb;
|
|
int ret;
|
|
|
|
ret = kstrtol(buf, 10, ¶m);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ac_usb = param;
|
|
switch (ac_usb) {
|
|
case 0:
|
|
/* Disable charging */
|
|
di->susp_status.ac_suspended = true;
|
|
di->susp_status.usb_suspended = true;
|
|
di->susp_status.suspended_change = true;
|
|
/* Trigger a state change */
|
|
queue_work(di->chargalg_wq,
|
|
&di->chargalg_work);
|
|
break;
|
|
case 1:
|
|
/* Enable AC Charging */
|
|
di->susp_status.ac_suspended = false;
|
|
di->susp_status.suspended_change = true;
|
|
/* Trigger a state change */
|
|
queue_work(di->chargalg_wq,
|
|
&di->chargalg_work);
|
|
break;
|
|
case 2:
|
|
/* Enable USB charging */
|
|
di->susp_status.usb_suspended = false;
|
|
di->susp_status.suspended_change = true;
|
|
/* Trigger a state change */
|
|
queue_work(di->chargalg_wq,
|
|
&di->chargalg_work);
|
|
break;
|
|
default:
|
|
dev_info(di->dev, "Wrong input\n"
|
|
"Enter 0. Disable AC/USB Charging\n"
|
|
"1. Enable AC charging\n"
|
|
"2. Enable USB Charging\n");
|
|
};
|
|
return strlen(buf);
|
|
}
|
|
|
|
static struct abx500_chargalg_sysfs_entry abx500_chargalg_en_charger =
|
|
__ATTR(chargalg, 0644, abx500_chargalg_en_show,
|
|
abx500_chargalg_en_store);
|
|
|
|
static struct abx500_chargalg_sysfs_entry abx500_chargalg_curr_step =
|
|
__ATTR(chargalg_curr_step, 0644, abx500_chargalg_curr_step_show,
|
|
abx500_chargalg_curr_step_store);
|
|
|
|
static ssize_t abx500_chargalg_sysfs_show(struct kobject *kobj,
|
|
struct attribute *attr, char *buf)
|
|
{
|
|
struct abx500_chargalg_sysfs_entry *entry = container_of(attr,
|
|
struct abx500_chargalg_sysfs_entry, attr);
|
|
|
|
struct abx500_chargalg *di = container_of(kobj,
|
|
struct abx500_chargalg, chargalg_kobject);
|
|
|
|
if (!entry->show)
|
|
return -EIO;
|
|
|
|
return entry->show(di, buf);
|
|
}
|
|
|
|
static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj,
|
|
struct attribute *attr, const char *buf, size_t length)
|
|
{
|
|
struct abx500_chargalg_sysfs_entry *entry = container_of(attr,
|
|
struct abx500_chargalg_sysfs_entry, attr);
|
|
|
|
struct abx500_chargalg *di = container_of(kobj,
|
|
struct abx500_chargalg, chargalg_kobject);
|
|
|
|
if (!entry->store)
|
|
return -EIO;
|
|
|
|
return entry->store(di, buf, length);
|
|
}
|
|
|
|
static struct attribute *abx500_chargalg_chg[] = {
|
|
&abx500_chargalg_en_charger.attr,
|
|
&abx500_chargalg_curr_step.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct sysfs_ops abx500_chargalg_sysfs_ops = {
|
|
.show = abx500_chargalg_sysfs_show,
|
|
.store = abx500_chargalg_sysfs_charger,
|
|
};
|
|
|
|
static struct kobj_type abx500_chargalg_ktype = {
|
|
.sysfs_ops = &abx500_chargalg_sysfs_ops,
|
|
.default_attrs = abx500_chargalg_chg,
|
|
};
|
|
|
|
/**
|
|
* abx500_chargalg_sysfs_exit() - de-init of sysfs entry
|
|
* @di: pointer to the struct abx500_chargalg
|
|
*
|
|
* This function removes the entry in sysfs.
|
|
*/
|
|
static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di)
|
|
{
|
|
kobject_del(&di->chargalg_kobject);
|
|
}
|
|
|
|
/**
|
|
* abx500_chargalg_sysfs_init() - init of sysfs entry
|
|
* @di: pointer to the struct abx500_chargalg
|
|
*
|
|
* This function adds an entry in sysfs.
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = kobject_init_and_add(&di->chargalg_kobject,
|
|
&abx500_chargalg_ktype,
|
|
NULL, "abx500_chargalg");
|
|
if (ret < 0)
|
|
dev_err(di->dev, "failed to create sysfs entry\n");
|
|
|
|
return ret;
|
|
}
|
|
/* Exposure to the sysfs interface <<END>> */
|
|
|
|
#if defined(CONFIG_PM)
|
|
static int abx500_chargalg_resume(struct platform_device *pdev)
|
|
{
|
|
struct abx500_chargalg *di = platform_get_drvdata(pdev);
|
|
|
|
/* Kick charger watchdog if charging (any charger online) */
|
|
if (di->chg_info.online_chg)
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0);
|
|
|
|
/*
|
|
* Run the charging algorithm directly to be sure we don't
|
|
* do it too seldom
|
|
*/
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int abx500_chargalg_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct abx500_chargalg *di = platform_get_drvdata(pdev);
|
|
|
|
if (di->chg_info.online_chg)
|
|
cancel_delayed_work_sync(&di->chargalg_wd_work);
|
|
|
|
cancel_delayed_work_sync(&di->chargalg_periodic_work);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define abx500_chargalg_suspend NULL
|
|
#define abx500_chargalg_resume NULL
|
|
#endif
|
|
|
|
static int abx500_chargalg_remove(struct platform_device *pdev)
|
|
{
|
|
struct abx500_chargalg *di = platform_get_drvdata(pdev);
|
|
|
|
/* sysfs interface to enable/disbale charging from user space */
|
|
abx500_chargalg_sysfs_exit(di);
|
|
|
|
hrtimer_cancel(&di->safety_timer);
|
|
hrtimer_cancel(&di->maintenance_timer);
|
|
|
|
cancel_delayed_work_sync(&di->chargalg_periodic_work);
|
|
cancel_delayed_work_sync(&di->chargalg_wd_work);
|
|
cancel_work_sync(&di->chargalg_work);
|
|
|
|
/* Delete the work queue */
|
|
destroy_workqueue(di->chargalg_wq);
|
|
|
|
power_supply_unregister(&di->chargalg_psy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static char *supply_interface[] = {
|
|
"ab8500_fg",
|
|
};
|
|
|
|
static int abx500_chargalg_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct abx500_bm_data *plat = pdev->dev.platform_data;
|
|
struct abx500_chargalg *di;
|
|
int ret = 0;
|
|
|
|
di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
|
|
if (!di) {
|
|
dev_err(&pdev->dev, "%s no mem for ab8500_chargalg\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!plat) {
|
|
dev_err(&pdev->dev, "no battery management data supplied\n");
|
|
return -EINVAL;
|
|
}
|
|
di->bm = plat;
|
|
|
|
if (np) {
|
|
ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to get battery information\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* get device struct and parent */
|
|
di->dev = &pdev->dev;
|
|
di->parent = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
/* chargalg supply */
|
|
di->chargalg_psy.name = "abx500_chargalg";
|
|
di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
di->chargalg_psy.properties = abx500_chargalg_props;
|
|
di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props);
|
|
di->chargalg_psy.get_property = abx500_chargalg_get_property;
|
|
di->chargalg_psy.supplied_to = supply_interface;
|
|
di->chargalg_psy.num_supplicants = ARRAY_SIZE(supply_interface),
|
|
di->chargalg_psy.external_power_changed =
|
|
abx500_chargalg_external_power_changed;
|
|
|
|
/* Initilialize safety timer */
|
|
hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
|
|
di->safety_timer.function = abx500_chargalg_safety_timer_expired;
|
|
|
|
/* Initilialize maintenance timer */
|
|
hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
|
|
di->maintenance_timer.function =
|
|
abx500_chargalg_maintenance_timer_expired;
|
|
|
|
/* Create a work queue for the chargalg */
|
|
di->chargalg_wq =
|
|
create_singlethread_workqueue("abx500_chargalg_wq");
|
|
if (di->chargalg_wq == NULL) {
|
|
dev_err(di->dev, "failed to create work queue\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Init work for chargalg */
|
|
INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work,
|
|
abx500_chargalg_periodic_work);
|
|
INIT_DEFERRABLE_WORK(&di->chargalg_wd_work,
|
|
abx500_chargalg_wd_work);
|
|
|
|
/* Init work for chargalg */
|
|
INIT_WORK(&di->chargalg_work, abx500_chargalg_work);
|
|
|
|
/* To detect charger at startup */
|
|
di->chg_info.prev_conn_chg = -1;
|
|
|
|
/* Register chargalg power supply class */
|
|
ret = power_supply_register(di->dev, &di->chargalg_psy);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to register chargalg psy\n");
|
|
goto free_chargalg_wq;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, di);
|
|
|
|
/* sysfs interface to enable/disable charging from user space */
|
|
ret = abx500_chargalg_sysfs_init(di);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to create sysfs entry\n");
|
|
goto free_psy;
|
|
}
|
|
di->curr_status.curr_step = CHARGALG_CURR_STEP_HIGH;
|
|
|
|
/* Run the charging algorithm */
|
|
queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);
|
|
|
|
dev_info(di->dev, "probe success\n");
|
|
return ret;
|
|
|
|
free_psy:
|
|
power_supply_unregister(&di->chargalg_psy);
|
|
free_chargalg_wq:
|
|
destroy_workqueue(di->chargalg_wq);
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id ab8500_chargalg_match[] = {
|
|
{ .compatible = "stericsson,ab8500-chargalg", },
|
|
{ },
|
|
};
|
|
|
|
static struct platform_driver abx500_chargalg_driver = {
|
|
.probe = abx500_chargalg_probe,
|
|
.remove = abx500_chargalg_remove,
|
|
.suspend = abx500_chargalg_suspend,
|
|
.resume = abx500_chargalg_resume,
|
|
.driver = {
|
|
.name = "ab8500-chargalg",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = ab8500_chargalg_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(abx500_chargalg_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Johan Palsson, Karl Komierowski");
|
|
MODULE_ALIAS("platform:abx500-chargalg");
|
|
MODULE_DESCRIPTION("abx500 battery charging algorithm");
|