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Release 4.11 drivers/power/supply/abx500_chargalg.c

/*
 * Copyright (C) ST-Ericsson SA 2012
 * Copyright (c) 2012 Sony Mobile Communications AB
 *
 * Charging algorithm driver for abx500 variants
 *
 * License Terms: GNU General Public License v2
 * Authors:
 *      Johan Palsson <johan.palsson@stericsson.com>
 *      Karl Komierowski <karl.komierowski@stericsson.com>
 *      Arun R Murthy <arun.murthy@stericsson.com>
 *      Author: Imre Sunyi <imre.sunyi@sonymobile.com>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/notifier.h>

/* Watchdog kick interval */

#define CHG_WD_INTERVAL			(6 * HZ)

/* End-of-charge criteria counter */

#define EOC_COND_CNT			10

/* One hour expressed in seconds */

#define ONE_HOUR_IN_SECONDS            3600

/* Five minutes expressed in seconds */

#define FIVE_MINUTES_IN_SECONDS        300

/* Plus margin for the low battery threshold */

#define BAT_PLUS_MARGIN                (100)


#define CHARGALG_CURR_STEP_LOW		0

#define CHARGALG_CURR_STEP_HIGH	100


enum abx500_chargers {
	
NO_CHG,
	
AC_CHG,
	
USB_CHG,
};


struct abx500_chargalg_charger_info {
	
enum abx500_chargers conn_chg;
	
enum abx500_chargers prev_conn_chg;
	
enum abx500_chargers online_chg;
	
enum abx500_chargers prev_online_chg;
	
enum abx500_chargers charger_type;
	
bool usb_chg_ok;
	
bool ac_chg_ok;
	
int usb_volt;
	
int usb_curr;
	
int ac_volt;
	
int ac_curr;
	
int usb_vset;
	
int usb_iset;
	
int ac_vset;
	
int ac_iset;
};


struct abx500_chargalg_suspension_status {
	
bool suspended_change;
	
bool ac_suspended;
	
bool usb_suspended;
};


struct abx500_chargalg_current_step_status {
	
bool curr_step_change;
	
int curr_step;
};


struct abx500_chargalg_battery_data {
	
int temp;
	
int volt;
	
int avg_curr;
	
int inst_curr;
	
int percent;
};


enum abx500_chargalg_states {
	
STATE_HANDHELD_INIT,
	
STATE_HANDHELD,
	
STATE_CHG_NOT_OK_INIT,
	
STATE_CHG_NOT_OK,
	
STATE_HW_TEMP_PROTECT_INIT,
	
STATE_HW_TEMP_PROTECT,
	
STATE_NORMAL_INIT,
	
STATE_USB_PP_PRE_CHARGE,
	
STATE_NORMAL,
	
STATE_WAIT_FOR_RECHARGE_INIT,
	
STATE_WAIT_FOR_RECHARGE,
	
STATE_MAINTENANCE_A_INIT,
	
STATE_MAINTENANCE_A,
	
STATE_MAINTENANCE_B_INIT,
	
STATE_MAINTENANCE_B,
	
STATE_TEMP_UNDEROVER_INIT,
	
STATE_TEMP_UNDEROVER,
	
STATE_TEMP_LOWHIGH_INIT,
	
STATE_TEMP_LOWHIGH,
	
STATE_SUSPENDED_INIT,
	
STATE_SUSPENDED,
	
STATE_OVV_PROTECT_INIT,
	
STATE_OVV_PROTECT,
	
STATE_SAFETY_TIMER_EXPIRED_INIT,
	
STATE_SAFETY_TIMER_EXPIRED,
	
STATE_BATT_REMOVED_INIT,
	
STATE_BATT_REMOVED,
	
STATE_WD_EXPIRED_INIT,
	
STATE_WD_EXPIRED,
};


static const char *states[] = {
	"HANDHELD_INIT",
	"HANDHELD",
	"CHG_NOT_OK_INIT",
	"CHG_NOT_OK",
	"HW_TEMP_PROTECT_INIT",
	"HW_TEMP_PROTECT",
	"NORMAL_INIT",
	"USB_PP_PRE_CHARGE",
	"NORMAL",
	"WAIT_FOR_RECHARGE_INIT",
	"WAIT_FOR_RECHARGE",
	"MAINTENANCE_A_INIT",
	"MAINTENANCE_A",
	"MAINTENANCE_B_INIT",
	"MAINTENANCE_B",
	"TEMP_UNDEROVER_INIT",
	"TEMP_UNDEROVER",
	"TEMP_LOWHIGH_INIT",
	"TEMP_LOWHIGH",
	"SUSPENDED_INIT",
	"SUSPENDED",
	"OVV_PROTECT_INIT",
	"OVV_PROTECT",
	"SAFETY_TIMER_EXPIRED_INIT",
	"SAFETY_TIMER_EXPIRED",
	"BATT_REMOVED_INIT",
	"BATT_REMOVED",
	"WD_EXPIRED_INIT",
	"WD_EXPIRED",
};


struct abx500_chargalg_events {
	
bool batt_unknown;
	
bool mainextchnotok;
	
bool batt_ovv;
	
bool batt_rem;
	
bool btemp_underover;
	
bool btemp_lowhigh;
	
bool main_thermal_prot;
	
bool usb_thermal_prot;
	
bool main_ovv;
	
bool vbus_ovv;
	
bool usbchargernotok;
	
bool safety_timer_expired;
	
bool maintenance_timer_expired;
	
bool ac_wd_expired;
	
bool usb_wd_expired;
	
bool ac_cv_active;
	
bool usb_cv_active;
	
bool vbus_collapsed;
};

/**
 * struct abx500_charge_curr_maximization - Charger maximization parameters
 * @original_iset:      the non optimized/maximised charger current
 * @current_iset:       the charging current used at this moment
 * @test_delta_i:       the delta between the current we want to charge and the
                        current that is really going into the battery
 * @condition_cnt:      number of iterations needed before a new charger current
                        is set
 * @max_current:        maximum charger current
 * @wait_cnt:           to avoid too fast current step down in case of charger
 *                      voltage collapse, we insert this delay between step
 *                      down
 * @level:              tells in how many steps the charging current has been
                        increased
 */

struct abx500_charge_curr_maximization {
	
int original_iset;
	
int current_iset;
	
int test_delta_i;
	
int condition_cnt;
	
int max_current;
	
int wait_cnt;
	
u8 level;
};


enum maxim_ret {
	
MAXIM_RET_NOACTION,
	
MAXIM_RET_CHANGE,
	
MAXIM_RET_IBAT_TOO_HIGH,
};

/**
 * struct abx500_chargalg - abx500 Charging algorithm device information
 * @dev:                pointer to the structure device
 * @charge_status:      battery operating status
 * @eoc_cnt:            counter used to determine end-of_charge
 * @maintenance_chg:    indicate if maintenance charge is active
 * @t_hyst_norm         temperature hysteresis when the temperature has been
 *                      over or under normal limits
 * @t_hyst_lowhigh      temperature hysteresis when the temperature has been
 *                      over or under the high or low limits
 * @charge_state:       current state of the charging algorithm
 * @ccm                 charging current maximization parameters
 * @chg_info:           information about connected charger types
 * @batt_data:          data of the battery
 * @susp_status:        current charger suspension status
 * @bm:                 Platform specific battery management information
 * @curr_status:        Current step status for over-current protection
 * @parent:             pointer to the struct abx500
 * @chargalg_psy:       structure that holds the battery properties exposed by
 *                      the charging algorithm
 * @events:             structure for information about events triggered
 * @chargalg_wq:                work queue for running the charging algorithm
 * @chargalg_periodic_work:     work to run the charging algorithm periodically
 * @chargalg_wd_work:           work to kick the charger watchdog periodically
 * @chargalg_work:              work to run the charging algorithm instantly
 * @safety_timer:               charging safety timer
 * @maintenance_timer:          maintenance charging timer
 * @chargalg_kobject:           structure of type kobject
 */

struct abx500_chargalg {
	
struct device *dev;
	
int charge_status;
	
int eoc_cnt;
	
bool maintenance_chg;
	
int t_hyst_norm;
	
int t_hyst_lowhigh;
	
enum abx500_chargalg_states charge_state;
	
struct abx500_charge_curr_maximization ccm;
	
struct abx500_chargalg_charger_info chg_info;
	
struct abx500_chargalg_battery_data batt_data;
	
struct abx500_chargalg_suspension_status susp_status;
	
struct ab8500 *parent;
	
struct abx500_chargalg_current_step_status curr_status;
	
struct abx500_bm_data *bm;
	
struct power_supply *chargalg_psy;
	
struct ux500_charger *ac_chg;
	
struct ux500_charger *usb_chg;
	
struct abx500_chargalg_events events;
	
struct workqueue_struct *chargalg_wq;
	
struct delayed_work chargalg_periodic_work;
	
struct delayed_work chargalg_wd_work;
	
struct work_struct chargalg_work;
	
struct hrtimer safety_timer;
	
struct hrtimer maintenance_timer;
	
struct kobject chargalg_kobject;
};

/*External charger prepare notifier*/

BLOCKING_NOTIFIER_HEAD(charger_notifier_list);

/* Main battery properties */

static enum power_supply_property abx500_chargalg_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
};


struct abx500_chargalg_sysfs_entry {
	
struct attribute attr;
	
ssize_t (*show)(struct abx500_chargalg *, char *);
	
ssize_t (*store)(struct abx500_chargalg *, const char *, size_t);
};

/**
 * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer
 * @timer:     pointer to the hrtimer structure
 *
 * This function gets called when the safety timer for the charger
 * expires
 */

static enum hrtimer_restart abx500_chargalg_safety_timer_expired(struct hrtimer *timer) { struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, safety_timer); dev_err(di->dev, "Safety timer expired\n"); di->events.safety_timer_expired = true; /* Trigger execution of the algorithm instantly */ queue_work(di->chargalg_wq, &di->chargalg_work); return HRTIMER_NORESTART; }

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/** * abx500_chargalg_maintenance_timer_expired() - Expiration of * the maintenance timer * @timer: pointer to the timer structure * * This function gets called when the maintenence timer * expires */
static enum hrtimer_restart abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer) { struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, maintenance_timer); dev_dbg(di->dev, "Maintenance timer expired\n"); di->events.maintenance_timer_expired = true; /* Trigger execution of the algorithm instantly */ queue_work(di->chargalg_wq, &di->chargalg_work); return HRTIMER_NORESTART; }

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/** * abx500_chargalg_state_to() - Change charge state * @di: pointer to the abx500_chargalg structure * * This function gets called when a charge state change should occur */
static void abx500_chargalg_state_to(struct abx500_chargalg *di, enum abx500_chargalg_states state) { dev_dbg(di->dev, "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", di->charge_state == state ? "NO" : "YES", di->charge_state, states[di->charge_state], state, states[state]); di->charge_state = state; }

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static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di) { switch (di->charge_state) { case STATE_NORMAL: case STATE_MAINTENANCE_A: case STATE_MAINTENANCE_B: break; default: return 0; } if (di->chg_info.charger_type & USB_CHG) { return di->usb_chg->ops.check_enable(di->usb_chg, di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); } else if ((di->chg_info.charger_type & AC_CHG) && !(di->ac_chg->external)) { return di->ac_chg->ops.check_enable(di->ac_chg, di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); } return 0; }

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/** * abx500_chargalg_check_charger_connection() - Check charger connection change * @di: pointer to the abx500_chargalg structure * * This function will check if there is a change in the charger connection * and change charge state accordingly. AC has precedence over USB. */
static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) { if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || di->susp_status.suspended_change) { /* * Charger state changed or suspension * has changed since last update */ if ((di->chg_info.conn_chg & AC_CHG) && !di->susp_status.ac_suspended) { dev_dbg(di->dev, "Charging source is AC\n"); if (di->chg_info.charger_type != AC_CHG) { di->chg_info.charger_type = AC_CHG; abx500_chargalg_state_to(di, STATE_NORMAL_INIT); } } else if ((di->chg_info.conn_chg & USB_CHG) && !di->susp_status.usb_suspended) { dev_dbg(di->dev, "Charging source is USB\n"); di->chg_info.charger_type = USB_CHG; abx500_chargalg_state_to(di, STATE_NORMAL_INIT); } else if (di->chg_info.conn_chg && (di->susp_status.ac_suspended || di->susp_status.usb_suspended)) { dev_dbg(di->dev, "Charging is suspended\n"); di->chg_info.charger_type = NO_CHG; abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); } else { dev_dbg(di->dev, "Charging source is OFF\n"); di->chg_info.charger_type = NO_CHG; abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); } di->chg_info.prev_conn_chg = di->chg_info.conn_chg; di->susp_status.suspended_change = false; } return di->chg_info.conn_chg; }

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/** * abx500_chargalg_check_current_step_status() - Check charging current * step status. * @di: pointer to the abx500_chargalg structure * * This function will check if there is a change in the charging current step * and change charge state accordingly. */
static void abx500_chargalg_check_current_step_status (struct abx500_chargalg *di) { if (di->curr_status.curr_step_change) abx500_chargalg_state_to(di, STATE_NORMAL_INIT); di->curr_status.curr_step_change = false; }

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/** * abx500_chargalg_start_safety_timer() - Start charging safety timer * @di: pointer to the abx500_chargalg structure * * The safety timer is used to avoid overcharging of old or bad batteries. * There are different timers for AC and USB */
static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) { /* Charger-dependent expiration time in hours*/ int timer_expiration = 0; switch (di->chg_info.charger_type) { case AC_CHG: timer_expiration = di->bm->main_safety_tmr_h; break; case USB_CHG: timer_expiration = di->bm->usb_safety_tmr_h; break; default: dev_err(di->dev, "Unknown charger to charge from\n"); break; } di->events.safety_timer_expired = false; hrtimer_set_expires_range(&di->safety_timer, ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); }

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/** * abx500_chargalg_stop_safety_timer() - Stop charging safety timer * @di: pointer to the abx500_chargalg structure * * 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; }

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/** * 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); }

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/** * 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; }

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/** * 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; }

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/** * 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); }

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/** * 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); }

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/** * 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); }

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/** * 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); }

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/** * 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; }

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/** * 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); }

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Total70100.00%1100.00%

/** * 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); }

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Arun Murthy70100.00%1100.00%
Total70100.00%1100.00%

/** * 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; } }

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Arun Murthy116100.00%1100.00%
Total116100.00%1100.00%

/** * 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); } } }

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Arun Murthy27296.45%150.00%
Lee Jones103.55%150.00%
Total282100.00%2100.00%

/** * 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; }

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Arun Murthy7597.40%150.00%
Lee Jones22.60%150.00%
Total77100.00%2100.00%

/** * 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; } }

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Arun Murthy16584.18%133.33%
Lee Jones3115.82%266.67%
Total196100.00%3100.00%


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; }

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PersonTokensPropCommitsCommitProp
Arun Murthy9693.20%150.00%
Lee Jones76.80%150.00%
Total103100.00%2100.00%

/** * 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; } }

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Arun Murthy43098.85%150.00%
Lee Jones51.15%150.00%
Total435100.00%2100.00%


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; } }

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Arun Murthy10498.11%150.00%
Lee Jones21.89%150.00%
Total106100.00%2100.00%


static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) { struct power_supply *psy; struct power_supply *ext = dev_get_drvdata(dev); const char **supplicants = (const char **)ext->supplied_to; struct abx500_chargalg *di; union power_supply_propval ret; int j; bool capacity_updated = false; psy = (struct power_supply *)data; di = power_supply_get_drvdata(psy); /* For all psy where the driver name appears in any supplied_to */ j = match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) 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 (!power_supply_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->desc->num_properties; j++) { enum power_supply_property prop; prop = ext->desc->properties[j]; /* * Initialize chargers if not already done. * The ab8500_charger*/ if (!di->ac_chg && ext->desc->type == POWER_SUPPLY_TYPE_MAINS) di->ac_chg = psy_to_ux500_charger(ext); else if (!di->usb_chg && ext->desc->type == POWER_SUPPLY_TYPE_USB) di->usb_chg = psy_to_ux500_charger(ext); if (power_supply_get_property(ext, prop, &ret)) continue; switch (prop) { case POWER_SUPPLY_PROP_PRESENT: switch (ext->desc->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->desc->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->desc->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->desc->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->desc->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->desc->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->desc->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->desc->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; }

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Arun Murthy133593.23%120.00%
Marcus Cooper382.65%120.00%
Krzysztof Kozlowski302.09%240.00%
Andy Shevchenko292.03%120.00%
Total1432100.00%5100.00%

/** * 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 = power_supply_get_drvdata(psy); /* * Trigger execution of the algorithm instantly and read * all power_supply properties there instead */ queue_work(di->chargalg_wq, &di->chargalg_work); }

Contributors

PersonTokensPropCommitsCommitProp
Arun Murthy3397.06%150.00%
Krzysztof Kozlowski12.94%150.00%
Total34100.00%2100.00%

/** * 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); }

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PersonTokensPropCommitsCommitProp
Arun Murthy140386.50%116.67%
Lee Jones21713.38%466.67%
Marcus Cooper20.12%116.67%
Total1622100.00%6100.00%

/** * 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); }

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Arun Murthy8197.59%150.00%
Lee Jones22.41%150.00%
Total83100.00%2100.00%

/** * 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); }

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Arun Murthy76100.00%1100.00%
Total76100.00%1100.00%

/** * 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); }

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Arun Murthy31100.00%1100.00%
Total31100.00%1100.00%

/** * 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 = power_supply_get_drvdata(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; }

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Arun Murthy11981.51%125.00%
Lee Jones2416.44%250.00%
Krzysztof Kozlowski32.05%125.00%
Total146100.00%4100.00%

/* 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); }

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Lee Jones29100.00%2100.00%
Total29100.00%2100.00%


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, &param); 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); }

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Lee Jones114100.00%2100.00%
Total114100.00%2100.00%


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); }

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Lee Jones35100.00%2100.00%
Total35100.00%2100.00%


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, &param); 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); }

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Arun Murthy18697.89%150.00%
Lee Jones42.11%150.00%
Total190100.00%2100.00%

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); }

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Lee Jones71100.00%1100.00%
Total71100.00%1100.00%


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); }

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Lee Jones77100.00%1100.00%
Total77100.00%1100.00%

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); }

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Arun Murthy19100.00%1100.00%
Total19100.00%1100.00%

/** * 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; }

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Arun Murthy51100.00%1100.00%
Total51100.00%1100.00%

/* 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; }

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Arun Murthy62100.00%1100.00%
Total62100.00%1100.00%


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; }

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Arun Murthy51100.00%1100.00%
Total51100.00%1100.00%

#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; }

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Arun Murthy4552.94%150.00%
Lee Jones4047.06%150.00%
Total85100.00%2100.00%

static char *supply_interface[] = { "ab8500_fg", }; static const struct power_supply_desc abx500_chargalg_desc = { .name = "abx500_chargalg", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = abx500_chargalg_props, .num_properties = ARRAY_SIZE(abx500_chargalg_props), .get_property = abx500_chargalg_get_property, .external_power_changed = abx500_chargalg_external_power_changed, };
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 power_supply_config psy_cfg = {}; 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); psy_cfg.supplied_to = supply_interface; psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); psy_cfg.drv_data = di; /* 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 = alloc_ordered_workqueue("abx500_chargalg_wq", WQ_MEM_RECLAIM); 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 */ di->chargalg_psy = power_supply_register(di->dev, &abx500_chargalg_desc, &psy_cfg); if (IS_ERR(di->chargalg_psy)) { dev_err(di->dev, "failed to register chargalg psy\n"); ret = PTR_ERR(di->chargalg_psy); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Arun Murthy26557.61%19.09%
Rajanikanth H.V8819.13%19.09%
Lee Jones6514.13%545.45%
Krzysztof Kozlowski378.04%218.18%
Bhaktipriya Shridhar30.65%19.09%
Tejun Heo20.43%19.09%
Total460100.00%11100.00%

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", .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");

Overall Contributors

PersonTokensPropCommitsCommitProp
Arun Murthy681680.35%14.55%
Lee Jones131515.50%1045.45%
Rajanikanth H.V1261.49%14.55%
Krzysztof Kozlowski1131.33%313.64%
Marcus Cooper400.47%14.55%
Loic Pallardy360.42%14.55%
Andy Shevchenko290.34%14.55%
Bhaktipriya Shridhar30.04%14.55%
Srinidhi Kasagar20.02%14.55%
Tejun Heo20.02%14.55%
Anton Vorontsov10.01%14.55%
Total8483100.00%22100.00%
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