1c5b64a99SLinus Walleij // SPDX-License-Identifier: GPL-2.0-only 2c5b64a99SLinus Walleij /* 3c5b64a99SLinus Walleij * Copyright (C) ST-Ericsson SA 2012 4c5b64a99SLinus Walleij * Copyright (c) 2012 Sony Mobile Communications AB 5c5b64a99SLinus Walleij * 6c5b64a99SLinus Walleij * Charging algorithm driver for AB8500 7c5b64a99SLinus Walleij * 8c5b64a99SLinus Walleij * Authors: 9c5b64a99SLinus Walleij * Johan Palsson <johan.palsson@stericsson.com> 10c5b64a99SLinus Walleij * Karl Komierowski <karl.komierowski@stericsson.com> 11c5b64a99SLinus Walleij * Arun R Murthy <arun.murthy@stericsson.com> 12c5b64a99SLinus Walleij * Author: Imre Sunyi <imre.sunyi@sonymobile.com> 13c5b64a99SLinus Walleij */ 14c5b64a99SLinus Walleij 15c5b64a99SLinus Walleij #include <linux/init.h> 16c5b64a99SLinus Walleij #include <linux/module.h> 17c5b64a99SLinus Walleij #include <linux/device.h> 18c5b64a99SLinus Walleij #include <linux/component.h> 19c5b64a99SLinus Walleij #include <linux/hrtimer.h> 20c5b64a99SLinus Walleij #include <linux/interrupt.h> 21c5b64a99SLinus Walleij #include <linux/delay.h> 22c5b64a99SLinus Walleij #include <linux/slab.h> 23c5b64a99SLinus Walleij #include <linux/platform_device.h> 24c5b64a99SLinus Walleij #include <linux/power_supply.h> 25c5b64a99SLinus Walleij #include <linux/completion.h> 26c5b64a99SLinus Walleij #include <linux/workqueue.h> 27c5b64a99SLinus Walleij #include <linux/kobject.h> 28c5b64a99SLinus Walleij #include <linux/of.h> 29c5b64a99SLinus Walleij #include <linux/mfd/core.h> 30c5b64a99SLinus Walleij #include <linux/mfd/abx500.h> 31c5b64a99SLinus Walleij #include <linux/mfd/abx500/ab8500.h> 32c5b64a99SLinus Walleij #include <linux/notifier.h> 33c5b64a99SLinus Walleij 34c5b64a99SLinus Walleij #include "ab8500-bm.h" 35c5b64a99SLinus Walleij #include "ab8500-chargalg.h" 36c5b64a99SLinus Walleij 37c5b64a99SLinus Walleij /* Watchdog kick interval */ 38c5b64a99SLinus Walleij #define CHG_WD_INTERVAL (6 * HZ) 39c5b64a99SLinus Walleij 40c5b64a99SLinus Walleij /* End-of-charge criteria counter */ 41c5b64a99SLinus Walleij #define EOC_COND_CNT 10 42c5b64a99SLinus Walleij 43c5b64a99SLinus Walleij /* One hour expressed in seconds */ 44c5b64a99SLinus Walleij #define ONE_HOUR_IN_SECONDS 3600 45c5b64a99SLinus Walleij 46c5b64a99SLinus Walleij /* Five minutes expressed in seconds */ 47c5b64a99SLinus Walleij #define FIVE_MINUTES_IN_SECONDS 300 48c5b64a99SLinus Walleij 491091ed7dSLinus Walleij /* 501091ed7dSLinus Walleij * This is the battery capacity limit that will trigger a new 511091ed7dSLinus Walleij * full charging cycle in the case where maintenance charging 521091ed7dSLinus Walleij * has been disabled 531091ed7dSLinus Walleij */ 541091ed7dSLinus Walleij #define AB8500_RECHARGE_CAP 95 551091ed7dSLinus Walleij 56c5b64a99SLinus Walleij enum ab8500_chargers { 57c5b64a99SLinus Walleij NO_CHG, 58c5b64a99SLinus Walleij AC_CHG, 59c5b64a99SLinus Walleij USB_CHG, 60c5b64a99SLinus Walleij }; 61c5b64a99SLinus Walleij 62c5b64a99SLinus Walleij struct ab8500_chargalg_charger_info { 63c5b64a99SLinus Walleij enum ab8500_chargers conn_chg; 64c5b64a99SLinus Walleij enum ab8500_chargers prev_conn_chg; 65c5b64a99SLinus Walleij enum ab8500_chargers online_chg; 66c5b64a99SLinus Walleij enum ab8500_chargers prev_online_chg; 67c5b64a99SLinus Walleij enum ab8500_chargers charger_type; 68c5b64a99SLinus Walleij bool usb_chg_ok; 69c5b64a99SLinus Walleij bool ac_chg_ok; 70bc6e0287SLinus Walleij int usb_volt_uv; 7183e5aa77SLinus Walleij int usb_curr_ua; 72bc6e0287SLinus Walleij int ac_volt_uv; 7383e5aa77SLinus Walleij int ac_curr_ua; 74bc6e0287SLinus Walleij int usb_vset_uv; 7583e5aa77SLinus Walleij int usb_iset_ua; 76bc6e0287SLinus Walleij int ac_vset_uv; 7783e5aa77SLinus Walleij int ac_iset_ua; 78c5b64a99SLinus Walleij }; 79c5b64a99SLinus Walleij 80c5b64a99SLinus Walleij struct ab8500_chargalg_suspension_status { 81c5b64a99SLinus Walleij bool suspended_change; 82c5b64a99SLinus Walleij bool ac_suspended; 83c5b64a99SLinus Walleij bool usb_suspended; 84c5b64a99SLinus Walleij }; 85c5b64a99SLinus Walleij 86c5b64a99SLinus Walleij struct ab8500_chargalg_battery_data { 87c5b64a99SLinus Walleij int temp; 882a5f4183SLinus Walleij int volt_uv; 899c20899dSLinus Walleij int avg_curr_ua; 9083e5aa77SLinus Walleij int inst_curr_ua; 91c5b64a99SLinus Walleij int percent; 92c5b64a99SLinus Walleij }; 93c5b64a99SLinus Walleij 94c5b64a99SLinus Walleij enum ab8500_chargalg_states { 95c5b64a99SLinus Walleij STATE_HANDHELD_INIT, 96c5b64a99SLinus Walleij STATE_HANDHELD, 97c5b64a99SLinus Walleij STATE_CHG_NOT_OK_INIT, 98c5b64a99SLinus Walleij STATE_CHG_NOT_OK, 99c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT_INIT, 100c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT, 101c5b64a99SLinus Walleij STATE_NORMAL_INIT, 102c5b64a99SLinus Walleij STATE_NORMAL, 103c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE_INIT, 104c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE, 105c5b64a99SLinus Walleij STATE_MAINTENANCE_A_INIT, 106c5b64a99SLinus Walleij STATE_MAINTENANCE_A, 107c5b64a99SLinus Walleij STATE_MAINTENANCE_B_INIT, 108c5b64a99SLinus Walleij STATE_MAINTENANCE_B, 109c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER_INIT, 110c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER, 111c5b64a99SLinus Walleij STATE_TEMP_LOWHIGH_INIT, 112c5b64a99SLinus Walleij STATE_TEMP_LOWHIGH, 113c5b64a99SLinus Walleij STATE_SUSPENDED_INIT, 114c5b64a99SLinus Walleij STATE_SUSPENDED, 115c5b64a99SLinus Walleij STATE_OVV_PROTECT_INIT, 116c5b64a99SLinus Walleij STATE_OVV_PROTECT, 117c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED_INIT, 118c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED, 119c5b64a99SLinus Walleij STATE_BATT_REMOVED_INIT, 120c5b64a99SLinus Walleij STATE_BATT_REMOVED, 121c5b64a99SLinus Walleij STATE_WD_EXPIRED_INIT, 122c5b64a99SLinus Walleij STATE_WD_EXPIRED, 123c5b64a99SLinus Walleij }; 124c5b64a99SLinus Walleij 12538334231SColin Ian King static const char * const states[] = { 126c5b64a99SLinus Walleij "HANDHELD_INIT", 127c5b64a99SLinus Walleij "HANDHELD", 128c5b64a99SLinus Walleij "CHG_NOT_OK_INIT", 129c5b64a99SLinus Walleij "CHG_NOT_OK", 130c5b64a99SLinus Walleij "HW_TEMP_PROTECT_INIT", 131c5b64a99SLinus Walleij "HW_TEMP_PROTECT", 132c5b64a99SLinus Walleij "NORMAL_INIT", 133c5b64a99SLinus Walleij "NORMAL", 134c5b64a99SLinus Walleij "WAIT_FOR_RECHARGE_INIT", 135c5b64a99SLinus Walleij "WAIT_FOR_RECHARGE", 136c5b64a99SLinus Walleij "MAINTENANCE_A_INIT", 137c5b64a99SLinus Walleij "MAINTENANCE_A", 138c5b64a99SLinus Walleij "MAINTENANCE_B_INIT", 139c5b64a99SLinus Walleij "MAINTENANCE_B", 140c5b64a99SLinus Walleij "TEMP_UNDEROVER_INIT", 141c5b64a99SLinus Walleij "TEMP_UNDEROVER", 142c5b64a99SLinus Walleij "TEMP_LOWHIGH_INIT", 143c5b64a99SLinus Walleij "TEMP_LOWHIGH", 144c5b64a99SLinus Walleij "SUSPENDED_INIT", 145c5b64a99SLinus Walleij "SUSPENDED", 146c5b64a99SLinus Walleij "OVV_PROTECT_INIT", 147c5b64a99SLinus Walleij "OVV_PROTECT", 148c5b64a99SLinus Walleij "SAFETY_TIMER_EXPIRED_INIT", 149c5b64a99SLinus Walleij "SAFETY_TIMER_EXPIRED", 150c5b64a99SLinus Walleij "BATT_REMOVED_INIT", 151c5b64a99SLinus Walleij "BATT_REMOVED", 152c5b64a99SLinus Walleij "WD_EXPIRED_INIT", 153c5b64a99SLinus Walleij "WD_EXPIRED", 154c5b64a99SLinus Walleij }; 155c5b64a99SLinus Walleij 156c5b64a99SLinus Walleij struct ab8500_chargalg_events { 157c5b64a99SLinus Walleij bool batt_unknown; 158c5b64a99SLinus Walleij bool mainextchnotok; 159c5b64a99SLinus Walleij bool batt_ovv; 160c5b64a99SLinus Walleij bool batt_rem; 161c5b64a99SLinus Walleij bool btemp_underover; 162c5b64a99SLinus Walleij bool btemp_lowhigh; 163c5b64a99SLinus Walleij bool main_thermal_prot; 164c5b64a99SLinus Walleij bool usb_thermal_prot; 165c5b64a99SLinus Walleij bool main_ovv; 166c5b64a99SLinus Walleij bool vbus_ovv; 167c5b64a99SLinus Walleij bool usbchargernotok; 168c5b64a99SLinus Walleij bool safety_timer_expired; 169c5b64a99SLinus Walleij bool maintenance_timer_expired; 170c5b64a99SLinus Walleij bool ac_wd_expired; 171c5b64a99SLinus Walleij bool usb_wd_expired; 172c5b64a99SLinus Walleij bool ac_cv_active; 173c5b64a99SLinus Walleij bool usb_cv_active; 174c5b64a99SLinus Walleij bool vbus_collapsed; 175c5b64a99SLinus Walleij }; 176c5b64a99SLinus Walleij 177c5b64a99SLinus Walleij /** 178c5b64a99SLinus Walleij * struct ab8500_charge_curr_maximization - Charger maximization parameters 17983e5aa77SLinus Walleij * @original_iset_ua: the non optimized/maximised charger current 18083e5aa77SLinus Walleij * @current_iset_ua: the charging current used at this moment 181c5b64a99SLinus Walleij * @condition_cnt: number of iterations needed before a new charger current 182c5b64a99SLinus Walleij is set 18383e5aa77SLinus Walleij * @max_current_ua: maximum charger current 184c5b64a99SLinus Walleij * @wait_cnt: to avoid too fast current step down in case of charger 185c5b64a99SLinus Walleij * voltage collapse, we insert this delay between step 186c5b64a99SLinus Walleij * down 187c5b64a99SLinus Walleij * @level: tells in how many steps the charging current has been 188c5b64a99SLinus Walleij increased 189c5b64a99SLinus Walleij */ 190c5b64a99SLinus Walleij struct ab8500_charge_curr_maximization { 19183e5aa77SLinus Walleij int original_iset_ua; 19283e5aa77SLinus Walleij int current_iset_ua; 193c5b64a99SLinus Walleij int condition_cnt; 19483e5aa77SLinus Walleij int max_current_ua; 195c5b64a99SLinus Walleij int wait_cnt; 196c5b64a99SLinus Walleij u8 level; 197c5b64a99SLinus Walleij }; 198c5b64a99SLinus Walleij 199c5b64a99SLinus Walleij enum maxim_ret { 200c5b64a99SLinus Walleij MAXIM_RET_NOACTION, 201c5b64a99SLinus Walleij MAXIM_RET_CHANGE, 202c5b64a99SLinus Walleij MAXIM_RET_IBAT_TOO_HIGH, 203c5b64a99SLinus Walleij }; 204c5b64a99SLinus Walleij 205c5b64a99SLinus Walleij /** 206c5b64a99SLinus Walleij * struct ab8500_chargalg - ab8500 Charging algorithm device information 207c5b64a99SLinus Walleij * @dev: pointer to the structure device 208c5b64a99SLinus Walleij * @charge_status: battery operating status 209c5b64a99SLinus Walleij * @eoc_cnt: counter used to determine end-of_charge 210c5b64a99SLinus Walleij * @maintenance_chg: indicate if maintenance charge is active 211c5b64a99SLinus Walleij * @t_hyst_norm temperature hysteresis when the temperature has been 212c5b64a99SLinus Walleij * over or under normal limits 213c5b64a99SLinus Walleij * @t_hyst_lowhigh temperature hysteresis when the temperature has been 214c5b64a99SLinus Walleij * over or under the high or low limits 215c5b64a99SLinus Walleij * @charge_state: current state of the charging algorithm 216c5b64a99SLinus Walleij * @ccm charging current maximization parameters 217c5b64a99SLinus Walleij * @chg_info: information about connected charger types 218c5b64a99SLinus Walleij * @batt_data: data of the battery 219c5b64a99SLinus Walleij * @susp_status: current charger suspension status 220c5b64a99SLinus Walleij * @bm: Platform specific battery management information 221c5b64a99SLinus Walleij * @parent: pointer to the struct ab8500 222c5b64a99SLinus Walleij * @chargalg_psy: structure that holds the battery properties exposed by 223c5b64a99SLinus Walleij * the charging algorithm 224c5b64a99SLinus Walleij * @events: structure for information about events triggered 225c5b64a99SLinus Walleij * @chargalg_wq: work queue for running the charging algorithm 226c5b64a99SLinus Walleij * @chargalg_periodic_work: work to run the charging algorithm periodically 227c5b64a99SLinus Walleij * @chargalg_wd_work: work to kick the charger watchdog periodically 228c5b64a99SLinus Walleij * @chargalg_work: work to run the charging algorithm instantly 229c5b64a99SLinus Walleij * @safety_timer: charging safety timer 230c5b64a99SLinus Walleij * @maintenance_timer: maintenance charging timer 231c5b64a99SLinus Walleij * @chargalg_kobject: structure of type kobject 232c5b64a99SLinus Walleij */ 233c5b64a99SLinus Walleij struct ab8500_chargalg { 234c5b64a99SLinus Walleij struct device *dev; 235c5b64a99SLinus Walleij int charge_status; 236c5b64a99SLinus Walleij int eoc_cnt; 237c5b64a99SLinus Walleij bool maintenance_chg; 238c5b64a99SLinus Walleij int t_hyst_norm; 239c5b64a99SLinus Walleij int t_hyst_lowhigh; 240c5b64a99SLinus Walleij enum ab8500_chargalg_states charge_state; 241c5b64a99SLinus Walleij struct ab8500_charge_curr_maximization ccm; 242c5b64a99SLinus Walleij struct ab8500_chargalg_charger_info chg_info; 243c5b64a99SLinus Walleij struct ab8500_chargalg_battery_data batt_data; 244c5b64a99SLinus Walleij struct ab8500_chargalg_suspension_status susp_status; 245c5b64a99SLinus Walleij struct ab8500 *parent; 246484a9cc3SLinus Walleij struct ab8500_bm_data *bm; 247c5b64a99SLinus Walleij struct power_supply *chargalg_psy; 248c5b64a99SLinus Walleij struct ux500_charger *ac_chg; 249c5b64a99SLinus Walleij struct ux500_charger *usb_chg; 250c5b64a99SLinus Walleij struct ab8500_chargalg_events events; 251c5b64a99SLinus Walleij struct workqueue_struct *chargalg_wq; 252c5b64a99SLinus Walleij struct delayed_work chargalg_periodic_work; 253c5b64a99SLinus Walleij struct delayed_work chargalg_wd_work; 254c5b64a99SLinus Walleij struct work_struct chargalg_work; 255c5b64a99SLinus Walleij struct hrtimer safety_timer; 256c5b64a99SLinus Walleij struct hrtimer maintenance_timer; 257c5b64a99SLinus Walleij struct kobject chargalg_kobject; 258c5b64a99SLinus Walleij }; 259c5b64a99SLinus Walleij 260c5b64a99SLinus Walleij /*External charger prepare notifier*/ 261c5b64a99SLinus Walleij BLOCKING_NOTIFIER_HEAD(charger_notifier_list); 262c5b64a99SLinus Walleij 263c5b64a99SLinus Walleij /* Main battery properties */ 264c5b64a99SLinus Walleij static enum power_supply_property ab8500_chargalg_props[] = { 265c5b64a99SLinus Walleij POWER_SUPPLY_PROP_STATUS, 266c5b64a99SLinus Walleij POWER_SUPPLY_PROP_HEALTH, 267c5b64a99SLinus Walleij }; 268c5b64a99SLinus Walleij 269c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry { 270c5b64a99SLinus Walleij struct attribute attr; 27138334231SColin Ian King ssize_t (*show)(struct ab8500_chargalg *di, char *buf); 27238334231SColin Ian King ssize_t (*store)(struct ab8500_chargalg *di, const char *buf, size_t length); 273c5b64a99SLinus Walleij }; 274c5b64a99SLinus Walleij 275c5b64a99SLinus Walleij /** 276c5b64a99SLinus Walleij * ab8500_chargalg_safety_timer_expired() - Expiration of the safety timer 277c5b64a99SLinus Walleij * @timer: pointer to the hrtimer structure 278c5b64a99SLinus Walleij * 279c5b64a99SLinus Walleij * This function gets called when the safety timer for the charger 280c5b64a99SLinus Walleij * expires 281c5b64a99SLinus Walleij */ 282c5b64a99SLinus Walleij static enum hrtimer_restart 283c5b64a99SLinus Walleij ab8500_chargalg_safety_timer_expired(struct hrtimer *timer) 284c5b64a99SLinus Walleij { 285c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg, 286c5b64a99SLinus Walleij safety_timer); 287c5b64a99SLinus Walleij dev_err(di->dev, "Safety timer expired\n"); 288c5b64a99SLinus Walleij di->events.safety_timer_expired = true; 289c5b64a99SLinus Walleij 290c5b64a99SLinus Walleij /* Trigger execution of the algorithm instantly */ 291c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 292c5b64a99SLinus Walleij 293c5b64a99SLinus Walleij return HRTIMER_NORESTART; 294c5b64a99SLinus Walleij } 295c5b64a99SLinus Walleij 296c5b64a99SLinus Walleij /** 297c5b64a99SLinus Walleij * ab8500_chargalg_maintenance_timer_expired() - Expiration of 298c5b64a99SLinus Walleij * the maintenance timer 299c5b64a99SLinus Walleij * @timer: pointer to the timer structure 300c5b64a99SLinus Walleij * 301c5b64a99SLinus Walleij * This function gets called when the maintenence timer 302c5b64a99SLinus Walleij * expires 303c5b64a99SLinus Walleij */ 304c5b64a99SLinus Walleij static enum hrtimer_restart 305c5b64a99SLinus Walleij ab8500_chargalg_maintenance_timer_expired(struct hrtimer *timer) 306c5b64a99SLinus Walleij { 307c5b64a99SLinus Walleij 308c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(timer, struct ab8500_chargalg, 309c5b64a99SLinus Walleij maintenance_timer); 310c5b64a99SLinus Walleij 311c5b64a99SLinus Walleij dev_dbg(di->dev, "Maintenance timer expired\n"); 312c5b64a99SLinus Walleij di->events.maintenance_timer_expired = true; 313c5b64a99SLinus Walleij 314c5b64a99SLinus Walleij /* Trigger execution of the algorithm instantly */ 315c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 316c5b64a99SLinus Walleij 317c5b64a99SLinus Walleij return HRTIMER_NORESTART; 318c5b64a99SLinus Walleij } 319c5b64a99SLinus Walleij 320c5b64a99SLinus Walleij /** 321c5b64a99SLinus Walleij * ab8500_chargalg_state_to() - Change charge state 322c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 323c5b64a99SLinus Walleij * 324c5b64a99SLinus Walleij * This function gets called when a charge state change should occur 325c5b64a99SLinus Walleij */ 326c5b64a99SLinus Walleij static void ab8500_chargalg_state_to(struct ab8500_chargalg *di, 327c5b64a99SLinus Walleij enum ab8500_chargalg_states state) 328c5b64a99SLinus Walleij { 329c5b64a99SLinus Walleij dev_dbg(di->dev, 330c5b64a99SLinus Walleij "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", 331c5b64a99SLinus Walleij di->charge_state == state ? "NO" : "YES", 332c5b64a99SLinus Walleij di->charge_state, 333c5b64a99SLinus Walleij states[di->charge_state], 334c5b64a99SLinus Walleij state, 335c5b64a99SLinus Walleij states[state]); 336c5b64a99SLinus Walleij 337c5b64a99SLinus Walleij di->charge_state = state; 338c5b64a99SLinus Walleij } 339c5b64a99SLinus Walleij 340c5b64a99SLinus Walleij static int ab8500_chargalg_check_charger_enable(struct ab8500_chargalg *di) 341c5b64a99SLinus Walleij { 34225fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 34383e5aa77SLinus Walleij 344c5b64a99SLinus Walleij switch (di->charge_state) { 345c5b64a99SLinus Walleij case STATE_NORMAL: 346c5b64a99SLinus Walleij case STATE_MAINTENANCE_A: 347c5b64a99SLinus Walleij case STATE_MAINTENANCE_B: 348c5b64a99SLinus Walleij break; 349c5b64a99SLinus Walleij default: 350c5b64a99SLinus Walleij return 0; 351c5b64a99SLinus Walleij } 352c5b64a99SLinus Walleij 353c5b64a99SLinus Walleij if (di->chg_info.charger_type & USB_CHG) { 354c5b64a99SLinus Walleij return di->usb_chg->ops.check_enable(di->usb_chg, 355bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 35683e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 357c5b64a99SLinus Walleij } else if ((di->chg_info.charger_type & AC_CHG) && 358c5b64a99SLinus Walleij !(di->ac_chg->external)) { 359c5b64a99SLinus Walleij return di->ac_chg->ops.check_enable(di->ac_chg, 360bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 36183e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 362c5b64a99SLinus Walleij } 363c5b64a99SLinus Walleij return 0; 364c5b64a99SLinus Walleij } 365c5b64a99SLinus Walleij 366c5b64a99SLinus Walleij /** 367c5b64a99SLinus Walleij * ab8500_chargalg_check_charger_connection() - Check charger connection change 368c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 369c5b64a99SLinus Walleij * 370c5b64a99SLinus Walleij * This function will check if there is a change in the charger connection 371c5b64a99SLinus Walleij * and change charge state accordingly. AC has precedence over USB. 372c5b64a99SLinus Walleij */ 373c5b64a99SLinus Walleij static int ab8500_chargalg_check_charger_connection(struct ab8500_chargalg *di) 374c5b64a99SLinus Walleij { 375c5b64a99SLinus Walleij if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || 376c5b64a99SLinus Walleij di->susp_status.suspended_change) { 377c5b64a99SLinus Walleij /* 378c5b64a99SLinus Walleij * Charger state changed or suspension 379c5b64a99SLinus Walleij * has changed since last update 380c5b64a99SLinus Walleij */ 381c5b64a99SLinus Walleij if ((di->chg_info.conn_chg & AC_CHG) && 382c5b64a99SLinus Walleij !di->susp_status.ac_suspended) { 383c5b64a99SLinus Walleij dev_dbg(di->dev, "Charging source is AC\n"); 384c5b64a99SLinus Walleij if (di->chg_info.charger_type != AC_CHG) { 385c5b64a99SLinus Walleij di->chg_info.charger_type = AC_CHG; 386c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 387c5b64a99SLinus Walleij } 388c5b64a99SLinus Walleij } else if ((di->chg_info.conn_chg & USB_CHG) && 389c5b64a99SLinus Walleij !di->susp_status.usb_suspended) { 390c5b64a99SLinus Walleij dev_dbg(di->dev, "Charging source is USB\n"); 391c5b64a99SLinus Walleij di->chg_info.charger_type = USB_CHG; 392c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 393c5b64a99SLinus Walleij } else if (di->chg_info.conn_chg && 394c5b64a99SLinus Walleij (di->susp_status.ac_suspended || 395c5b64a99SLinus Walleij di->susp_status.usb_suspended)) { 396c5b64a99SLinus Walleij dev_dbg(di->dev, "Charging is suspended\n"); 397c5b64a99SLinus Walleij di->chg_info.charger_type = NO_CHG; 398c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_SUSPENDED_INIT); 399c5b64a99SLinus Walleij } else { 400c5b64a99SLinus Walleij dev_dbg(di->dev, "Charging source is OFF\n"); 401c5b64a99SLinus Walleij di->chg_info.charger_type = NO_CHG; 402c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT); 403c5b64a99SLinus Walleij } 404c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = di->chg_info.conn_chg; 405c5b64a99SLinus Walleij di->susp_status.suspended_change = false; 406c5b64a99SLinus Walleij } 407c5b64a99SLinus Walleij return di->chg_info.conn_chg; 408c5b64a99SLinus Walleij } 409c5b64a99SLinus Walleij 410c5b64a99SLinus Walleij /** 411c5b64a99SLinus Walleij * ab8500_chargalg_start_safety_timer() - Start charging safety timer 412c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 413c5b64a99SLinus Walleij * 414c5b64a99SLinus Walleij * The safety timer is used to avoid overcharging of old or bad batteries. 415c5b64a99SLinus Walleij * There are different timers for AC and USB 416c5b64a99SLinus Walleij */ 417c5b64a99SLinus Walleij static void ab8500_chargalg_start_safety_timer(struct ab8500_chargalg *di) 418c5b64a99SLinus Walleij { 419c5b64a99SLinus Walleij /* Charger-dependent expiration time in hours*/ 420c5b64a99SLinus Walleij int timer_expiration = 0; 421c5b64a99SLinus Walleij 422c5b64a99SLinus Walleij switch (di->chg_info.charger_type) { 423c5b64a99SLinus Walleij case AC_CHG: 424c5b64a99SLinus Walleij timer_expiration = di->bm->main_safety_tmr_h; 425c5b64a99SLinus Walleij break; 426c5b64a99SLinus Walleij 427c5b64a99SLinus Walleij case USB_CHG: 428c5b64a99SLinus Walleij timer_expiration = di->bm->usb_safety_tmr_h; 429c5b64a99SLinus Walleij break; 430c5b64a99SLinus Walleij 431c5b64a99SLinus Walleij default: 432c5b64a99SLinus Walleij dev_err(di->dev, "Unknown charger to charge from\n"); 433c5b64a99SLinus Walleij break; 434c5b64a99SLinus Walleij } 435c5b64a99SLinus Walleij 436c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 437c5b64a99SLinus Walleij hrtimer_set_expires_range(&di->safety_timer, 438c5b64a99SLinus Walleij ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), 439c5b64a99SLinus Walleij ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); 440c5b64a99SLinus Walleij hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); 441c5b64a99SLinus Walleij } 442c5b64a99SLinus Walleij 443c5b64a99SLinus Walleij /** 444c5b64a99SLinus Walleij * ab8500_chargalg_stop_safety_timer() - Stop charging safety timer 445c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 446c5b64a99SLinus Walleij * 447c5b64a99SLinus Walleij * The safety timer is stopped whenever the NORMAL state is exited 448c5b64a99SLinus Walleij */ 449c5b64a99SLinus Walleij static void ab8500_chargalg_stop_safety_timer(struct ab8500_chargalg *di) 450c5b64a99SLinus Walleij { 451c5b64a99SLinus Walleij if (hrtimer_try_to_cancel(&di->safety_timer) >= 0) 452c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 453c5b64a99SLinus Walleij } 454c5b64a99SLinus Walleij 455c5b64a99SLinus Walleij /** 456c5b64a99SLinus Walleij * ab8500_chargalg_start_maintenance_timer() - Start charging maintenance timer 457c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 458c5b64a99SLinus Walleij * @duration: duration of ther maintenance timer in hours 459c5b64a99SLinus Walleij * 460c5b64a99SLinus Walleij * The maintenance timer is used to maintain the charge in the battery once 461c5b64a99SLinus Walleij * the battery is considered full. These timers are chosen to match the 462c5b64a99SLinus Walleij * discharge curve of the battery 463c5b64a99SLinus Walleij */ 464c5b64a99SLinus Walleij static void ab8500_chargalg_start_maintenance_timer(struct ab8500_chargalg *di, 465c5b64a99SLinus Walleij int duration) 466c5b64a99SLinus Walleij { 467c5b64a99SLinus Walleij hrtimer_set_expires_range(&di->maintenance_timer, 468c5b64a99SLinus Walleij ktime_set(duration * ONE_HOUR_IN_SECONDS, 0), 469c5b64a99SLinus Walleij ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); 470c5b64a99SLinus Walleij di->events.maintenance_timer_expired = false; 471c5b64a99SLinus Walleij hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL); 472c5b64a99SLinus Walleij } 473c5b64a99SLinus Walleij 474c5b64a99SLinus Walleij /** 475c5b64a99SLinus Walleij * ab8500_chargalg_stop_maintenance_timer() - Stop maintenance timer 476c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 477c5b64a99SLinus Walleij * 478c5b64a99SLinus Walleij * The maintenance timer is stopped whenever maintenance ends or when another 479c5b64a99SLinus Walleij * state is entered 480c5b64a99SLinus Walleij */ 481c5b64a99SLinus Walleij static void ab8500_chargalg_stop_maintenance_timer(struct ab8500_chargalg *di) 482c5b64a99SLinus Walleij { 483c5b64a99SLinus Walleij if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0) 484c5b64a99SLinus Walleij di->events.maintenance_timer_expired = false; 485c5b64a99SLinus Walleij } 486c5b64a99SLinus Walleij 487c5b64a99SLinus Walleij /** 488c5b64a99SLinus Walleij * ab8500_chargalg_kick_watchdog() - Kick charger watchdog 489c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 490c5b64a99SLinus Walleij * 491c5b64a99SLinus Walleij * The charger watchdog have to be kicked periodically whenever the charger is 492c5b64a99SLinus Walleij * on, else the ABB will reset the system 493c5b64a99SLinus Walleij */ 494c5b64a99SLinus Walleij static int ab8500_chargalg_kick_watchdog(struct ab8500_chargalg *di) 495c5b64a99SLinus Walleij { 496c5b64a99SLinus Walleij /* Check if charger exists and kick watchdog if charging */ 497c5b64a99SLinus Walleij if (di->ac_chg && di->ac_chg->ops.kick_wd && 498c5b64a99SLinus Walleij di->chg_info.online_chg & AC_CHG) { 499c5b64a99SLinus Walleij /* 500c5b64a99SLinus Walleij * If AB charger watchdog expired, pm2xxx charging 501c5b64a99SLinus Walleij * gets disabled. To be safe, kick both AB charger watchdog 502c5b64a99SLinus Walleij * and pm2xxx watchdog. 503c5b64a99SLinus Walleij */ 504c5b64a99SLinus Walleij if (di->ac_chg->external && 505c5b64a99SLinus Walleij di->usb_chg && di->usb_chg->ops.kick_wd) 506c5b64a99SLinus Walleij di->usb_chg->ops.kick_wd(di->usb_chg); 507c5b64a99SLinus Walleij 508c5b64a99SLinus Walleij return di->ac_chg->ops.kick_wd(di->ac_chg); 50938334231SColin Ian King } else if (di->usb_chg && di->usb_chg->ops.kick_wd && 510c5b64a99SLinus Walleij di->chg_info.online_chg & USB_CHG) 511c5b64a99SLinus Walleij return di->usb_chg->ops.kick_wd(di->usb_chg); 512c5b64a99SLinus Walleij 513c5b64a99SLinus Walleij return -ENXIO; 514c5b64a99SLinus Walleij } 515c5b64a99SLinus Walleij 516c5b64a99SLinus Walleij /** 517c5b64a99SLinus Walleij * ab8500_chargalg_ac_en() - Turn on/off the AC charger 518c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 519c5b64a99SLinus Walleij * @enable: charger on/off 520bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 52183e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 522c5b64a99SLinus Walleij * 523c5b64a99SLinus Walleij * The AC charger will be turned on/off with the requested charge voltage and 524c5b64a99SLinus Walleij * current 525c5b64a99SLinus Walleij */ 526c5b64a99SLinus Walleij static int ab8500_chargalg_ac_en(struct ab8500_chargalg *di, int enable, 527bc6e0287SLinus Walleij int vset_uv, int iset_ua) 528c5b64a99SLinus Walleij { 529c5b64a99SLinus Walleij static int ab8500_chargalg_ex_ac_enable_toggle; 530c5b64a99SLinus Walleij 531c5b64a99SLinus Walleij if (!di->ac_chg || !di->ac_chg->ops.enable) 532c5b64a99SLinus Walleij return -ENXIO; 533c5b64a99SLinus Walleij 534c5b64a99SLinus Walleij /* Select maximum of what both the charger and the battery supports */ 535bc6e0287SLinus Walleij if (di->ac_chg->max_out_volt_uv) 536bc6e0287SLinus Walleij vset_uv = min(vset_uv, di->ac_chg->max_out_volt_uv); 53783e5aa77SLinus Walleij if (di->ac_chg->max_out_curr_ua) 53883e5aa77SLinus Walleij iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua); 539c5b64a99SLinus Walleij 54083e5aa77SLinus Walleij di->chg_info.ac_iset_ua = iset_ua; 541bc6e0287SLinus Walleij di->chg_info.ac_vset_uv = vset_uv; 542c5b64a99SLinus Walleij 543c5b64a99SLinus Walleij /* Enable external charger */ 544c5b64a99SLinus Walleij if (enable && di->ac_chg->external && 545c5b64a99SLinus Walleij !ab8500_chargalg_ex_ac_enable_toggle) { 546c5b64a99SLinus Walleij blocking_notifier_call_chain(&charger_notifier_list, 547c5b64a99SLinus Walleij 0, di->dev); 548c5b64a99SLinus Walleij ab8500_chargalg_ex_ac_enable_toggle++; 549c5b64a99SLinus Walleij } 550c5b64a99SLinus Walleij 551bc6e0287SLinus Walleij return di->ac_chg->ops.enable(di->ac_chg, enable, vset_uv, iset_ua); 552c5b64a99SLinus Walleij } 553c5b64a99SLinus Walleij 554c5b64a99SLinus Walleij /** 555c5b64a99SLinus Walleij * ab8500_chargalg_usb_en() - Turn on/off the USB charger 556c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 557c5b64a99SLinus Walleij * @enable: charger on/off 558bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 55983e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 560c5b64a99SLinus Walleij * 561c5b64a99SLinus Walleij * The USB charger will be turned on/off with the requested charge voltage and 562c5b64a99SLinus Walleij * current 563c5b64a99SLinus Walleij */ 564c5b64a99SLinus Walleij static int ab8500_chargalg_usb_en(struct ab8500_chargalg *di, int enable, 565bc6e0287SLinus Walleij int vset_uv, int iset_ua) 566c5b64a99SLinus Walleij { 567c5b64a99SLinus Walleij if (!di->usb_chg || !di->usb_chg->ops.enable) 568c5b64a99SLinus Walleij return -ENXIO; 569c5b64a99SLinus Walleij 570c5b64a99SLinus Walleij /* Select maximum of what both the charger and the battery supports */ 571bc6e0287SLinus Walleij if (di->usb_chg->max_out_volt_uv) 572bc6e0287SLinus Walleij vset_uv = min(vset_uv, di->usb_chg->max_out_volt_uv); 57383e5aa77SLinus Walleij if (di->usb_chg->max_out_curr_ua) 57483e5aa77SLinus Walleij iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua); 575c5b64a99SLinus Walleij 57683e5aa77SLinus Walleij di->chg_info.usb_iset_ua = iset_ua; 577bc6e0287SLinus Walleij di->chg_info.usb_vset_uv = vset_uv; 578c5b64a99SLinus Walleij 579bc6e0287SLinus Walleij return di->usb_chg->ops.enable(di->usb_chg, enable, vset_uv, iset_ua); 580c5b64a99SLinus Walleij } 581c5b64a99SLinus Walleij 582c5b64a99SLinus Walleij /** 583c5b64a99SLinus Walleij * ab8500_chargalg_update_chg_curr() - Update charger current 584c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 58583e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 586c5b64a99SLinus Walleij * 587c5b64a99SLinus Walleij * The charger output current will be updated for the charger 588c5b64a99SLinus Walleij * that is currently in use 589c5b64a99SLinus Walleij */ 590c5b64a99SLinus Walleij static int ab8500_chargalg_update_chg_curr(struct ab8500_chargalg *di, 59183e5aa77SLinus Walleij int iset_ua) 592c5b64a99SLinus Walleij { 593c5b64a99SLinus Walleij /* Check if charger exists and update current if charging */ 594c5b64a99SLinus Walleij if (di->ac_chg && di->ac_chg->ops.update_curr && 595c5b64a99SLinus Walleij di->chg_info.charger_type & AC_CHG) { 596c5b64a99SLinus Walleij /* 597c5b64a99SLinus Walleij * Select maximum of what both the charger 598c5b64a99SLinus Walleij * and the battery supports 599c5b64a99SLinus Walleij */ 60083e5aa77SLinus Walleij if (di->ac_chg->max_out_curr_ua) 60183e5aa77SLinus Walleij iset_ua = min(iset_ua, di->ac_chg->max_out_curr_ua); 602c5b64a99SLinus Walleij 60383e5aa77SLinus Walleij di->chg_info.ac_iset_ua = iset_ua; 604c5b64a99SLinus Walleij 60583e5aa77SLinus Walleij return di->ac_chg->ops.update_curr(di->ac_chg, iset_ua); 606c5b64a99SLinus Walleij } else if (di->usb_chg && di->usb_chg->ops.update_curr && 607c5b64a99SLinus Walleij di->chg_info.charger_type & USB_CHG) { 608c5b64a99SLinus Walleij /* 609c5b64a99SLinus Walleij * Select maximum of what both the charger 610c5b64a99SLinus Walleij * and the battery supports 611c5b64a99SLinus Walleij */ 61283e5aa77SLinus Walleij if (di->usb_chg->max_out_curr_ua) 61383e5aa77SLinus Walleij iset_ua = min(iset_ua, di->usb_chg->max_out_curr_ua); 614c5b64a99SLinus Walleij 61583e5aa77SLinus Walleij di->chg_info.usb_iset_ua = iset_ua; 616c5b64a99SLinus Walleij 61783e5aa77SLinus Walleij return di->usb_chg->ops.update_curr(di->usb_chg, iset_ua); 618c5b64a99SLinus Walleij } 619c5b64a99SLinus Walleij 620c5b64a99SLinus Walleij return -ENXIO; 621c5b64a99SLinus Walleij } 622c5b64a99SLinus Walleij 623c5b64a99SLinus Walleij /** 624c5b64a99SLinus Walleij * ab8500_chargalg_stop_charging() - Stop charging 625c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 626c5b64a99SLinus Walleij * 627c5b64a99SLinus Walleij * This function is called from any state where charging should be stopped. 628c5b64a99SLinus Walleij * All charging is disabled and all status parameters and timers are changed 629c5b64a99SLinus Walleij * accordingly 630c5b64a99SLinus Walleij */ 631c5b64a99SLinus Walleij static void ab8500_chargalg_stop_charging(struct ab8500_chargalg *di) 632c5b64a99SLinus Walleij { 633c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 634c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 635c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 636c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 637c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 638c5b64a99SLinus Walleij di->maintenance_chg = false; 639c5b64a99SLinus Walleij cancel_delayed_work(&di->chargalg_wd_work); 640c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 641c5b64a99SLinus Walleij } 642c5b64a99SLinus Walleij 643c5b64a99SLinus Walleij /** 644c5b64a99SLinus Walleij * ab8500_chargalg_hold_charging() - Pauses charging 645c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 646c5b64a99SLinus Walleij * 647c5b64a99SLinus Walleij * This function is called in the case where maintenance charging has been 648c5b64a99SLinus Walleij * disabled and instead a battery voltage mode is entered to check when the 649c5b64a99SLinus Walleij * battery voltage has reached a certain recharge voltage 650c5b64a99SLinus Walleij */ 651c5b64a99SLinus Walleij static void ab8500_chargalg_hold_charging(struct ab8500_chargalg *di) 652c5b64a99SLinus Walleij { 653c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 654c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 655c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 656c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 657c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 658c5b64a99SLinus Walleij di->maintenance_chg = false; 659c5b64a99SLinus Walleij cancel_delayed_work(&di->chargalg_wd_work); 660c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 661c5b64a99SLinus Walleij } 662c5b64a99SLinus Walleij 663c5b64a99SLinus Walleij /** 664c5b64a99SLinus Walleij * ab8500_chargalg_start_charging() - Start the charger 665c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 666bc6e0287SLinus Walleij * @vset_uv: requested charger output voltage in microvolt 66783e5aa77SLinus Walleij * @iset_ua: requested charger output current in microampere 668c5b64a99SLinus Walleij * 669c5b64a99SLinus Walleij * A charger will be enabled depending on the requested charger type that was 670c5b64a99SLinus Walleij * detected previously. 671c5b64a99SLinus Walleij */ 672c5b64a99SLinus Walleij static void ab8500_chargalg_start_charging(struct ab8500_chargalg *di, 673bc6e0287SLinus Walleij int vset_uv, int iset_ua) 674c5b64a99SLinus Walleij { 675c5b64a99SLinus Walleij switch (di->chg_info.charger_type) { 676c5b64a99SLinus Walleij case AC_CHG: 677c5b64a99SLinus Walleij dev_dbg(di->dev, 678bc6e0287SLinus Walleij "AC parameters: Vset %d, Ich %d\n", vset_uv, iset_ua); 679c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 680bc6e0287SLinus Walleij ab8500_chargalg_ac_en(di, true, vset_uv, iset_ua); 681c5b64a99SLinus Walleij break; 682c5b64a99SLinus Walleij 683c5b64a99SLinus Walleij case USB_CHG: 684c5b64a99SLinus Walleij dev_dbg(di->dev, 685bc6e0287SLinus Walleij "USB parameters: Vset %d, Ich %d\n", vset_uv, iset_ua); 686c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 687bc6e0287SLinus Walleij ab8500_chargalg_usb_en(di, true, vset_uv, iset_ua); 688c5b64a99SLinus Walleij break; 689c5b64a99SLinus Walleij 690c5b64a99SLinus Walleij default: 691c5b64a99SLinus Walleij dev_err(di->dev, "Unknown charger to charge from\n"); 692c5b64a99SLinus Walleij break; 693c5b64a99SLinus Walleij } 694c5b64a99SLinus Walleij } 695c5b64a99SLinus Walleij 696c5b64a99SLinus Walleij /** 697c5b64a99SLinus Walleij * ab8500_chargalg_check_temp() - Check battery temperature ranges 698c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 699c5b64a99SLinus Walleij * 700c5b64a99SLinus Walleij * The battery temperature is checked against the predefined limits and the 701c5b64a99SLinus Walleij * charge state is changed accordingly 702c5b64a99SLinus Walleij */ 703c5b64a99SLinus Walleij static void ab8500_chargalg_check_temp(struct ab8500_chargalg *di) 704c5b64a99SLinus Walleij { 70525fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 7066252c706SLinus Walleij 7076252c706SLinus Walleij if (di->batt_data.temp > (bi->temp_alert_min + di->t_hyst_norm) && 7086252c706SLinus Walleij di->batt_data.temp < (bi->temp_alert_max - di->t_hyst_norm)) { 709c5b64a99SLinus Walleij /* Temp OK! */ 710c5b64a99SLinus Walleij di->events.btemp_underover = false; 711c5b64a99SLinus Walleij di->events.btemp_lowhigh = false; 712c5b64a99SLinus Walleij di->t_hyst_norm = 0; 713c5b64a99SLinus Walleij di->t_hyst_lowhigh = 0; 714c5b64a99SLinus Walleij } else { 7156252c706SLinus Walleij if (((di->batt_data.temp >= bi->temp_alert_max) && 716c5b64a99SLinus Walleij (di->batt_data.temp < 7176252c706SLinus Walleij (bi->temp_max - di->t_hyst_lowhigh))) || 718c5b64a99SLinus Walleij ((di->batt_data.temp > 7196252c706SLinus Walleij (bi->temp_min + di->t_hyst_lowhigh)) && 7206252c706SLinus Walleij (di->batt_data.temp <= bi->temp_alert_min))) { 721c5b64a99SLinus Walleij /* TEMP minor!!!!! */ 722c5b64a99SLinus Walleij di->events.btemp_underover = false; 723c5b64a99SLinus Walleij di->events.btemp_lowhigh = true; 724c5b64a99SLinus Walleij di->t_hyst_norm = di->bm->temp_hysteresis; 725c5b64a99SLinus Walleij di->t_hyst_lowhigh = 0; 7266252c706SLinus Walleij } else if (di->batt_data.temp <= bi->temp_min || 7276252c706SLinus Walleij di->batt_data.temp >= bi->temp_max) { 728c5b64a99SLinus Walleij /* TEMP major!!!!! */ 729c5b64a99SLinus Walleij di->events.btemp_underover = true; 730c5b64a99SLinus Walleij di->events.btemp_lowhigh = false; 731c5b64a99SLinus Walleij di->t_hyst_norm = 0; 732c5b64a99SLinus Walleij di->t_hyst_lowhigh = di->bm->temp_hysteresis; 733c5b64a99SLinus Walleij } else { 734c5b64a99SLinus Walleij /* Within hysteresis */ 735c5b64a99SLinus Walleij dev_dbg(di->dev, "Within hysteresis limit temp: %d " 736c5b64a99SLinus Walleij "hyst_lowhigh %d, hyst normal %d\n", 737c5b64a99SLinus Walleij di->batt_data.temp, di->t_hyst_lowhigh, 738c5b64a99SLinus Walleij di->t_hyst_norm); 739c5b64a99SLinus Walleij } 740c5b64a99SLinus Walleij } 741c5b64a99SLinus Walleij } 742c5b64a99SLinus Walleij 743c5b64a99SLinus Walleij /** 744c5b64a99SLinus Walleij * ab8500_chargalg_check_charger_voltage() - Check charger voltage 745c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 746c5b64a99SLinus Walleij * 747c5b64a99SLinus Walleij * Charger voltage is checked against maximum limit 748c5b64a99SLinus Walleij */ 749c5b64a99SLinus Walleij static void ab8500_chargalg_check_charger_voltage(struct ab8500_chargalg *di) 750c5b64a99SLinus Walleij { 751bc6e0287SLinus Walleij if (di->chg_info.usb_volt_uv > di->bm->chg_params->usb_volt_max_uv) 752c5b64a99SLinus Walleij di->chg_info.usb_chg_ok = false; 753c5b64a99SLinus Walleij else 754c5b64a99SLinus Walleij di->chg_info.usb_chg_ok = true; 755c5b64a99SLinus Walleij 756bc6e0287SLinus Walleij if (di->chg_info.ac_volt_uv > di->bm->chg_params->ac_volt_max_uv) 757c5b64a99SLinus Walleij di->chg_info.ac_chg_ok = false; 758c5b64a99SLinus Walleij else 759c5b64a99SLinus Walleij di->chg_info.ac_chg_ok = true; 760c5b64a99SLinus Walleij 761c5b64a99SLinus Walleij } 762c5b64a99SLinus Walleij 763c5b64a99SLinus Walleij /** 764c5b64a99SLinus Walleij * ab8500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled 765c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 766c5b64a99SLinus Walleij * 767c5b64a99SLinus Walleij * End-of-charge criteria is fulfilled when the battery voltage is above a 768c5b64a99SLinus Walleij * certain limit and the battery current is below a certain limit for a 769c5b64a99SLinus Walleij * predefined number of consecutive seconds. If true, the battery is full 770c5b64a99SLinus Walleij */ 771c5b64a99SLinus Walleij static void ab8500_chargalg_end_of_charge(struct ab8500_chargalg *di) 772c5b64a99SLinus Walleij { 773c5b64a99SLinus Walleij if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && 774c5b64a99SLinus Walleij di->charge_state == STATE_NORMAL && 7752a5f4183SLinus Walleij !di->maintenance_chg && (di->batt_data.volt_uv >= 776d662a7dfSLinus Walleij di->bm->bi->voltage_max_design_uv || 777c5b64a99SLinus Walleij di->events.usb_cv_active || di->events.ac_cv_active) && 7789c20899dSLinus Walleij di->batt_data.avg_curr_ua < 77925fd3303SLinus Walleij di->bm->bi->charge_term_current_ua && 7809c20899dSLinus Walleij di->batt_data.avg_curr_ua > 0) { 781c5b64a99SLinus Walleij if (++di->eoc_cnt >= EOC_COND_CNT) { 782c5b64a99SLinus Walleij di->eoc_cnt = 0; 783c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_FULL; 784c5b64a99SLinus Walleij di->maintenance_chg = true; 785c5b64a99SLinus Walleij dev_dbg(di->dev, "EOC reached!\n"); 786c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 787c5b64a99SLinus Walleij } else { 788c5b64a99SLinus Walleij dev_dbg(di->dev, 789c5b64a99SLinus Walleij " EOC limit reached for the %d" 790c5b64a99SLinus Walleij " time, out of %d before EOC\n", 791c5b64a99SLinus Walleij di->eoc_cnt, 792c5b64a99SLinus Walleij EOC_COND_CNT); 793c5b64a99SLinus Walleij } 794c5b64a99SLinus Walleij } else { 795c5b64a99SLinus Walleij di->eoc_cnt = 0; 796c5b64a99SLinus Walleij } 797c5b64a99SLinus Walleij } 798c5b64a99SLinus Walleij 799c5b64a99SLinus Walleij static void init_maxim_chg_curr(struct ab8500_chargalg *di) 800c5b64a99SLinus Walleij { 80125fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 80283e5aa77SLinus Walleij 80383e5aa77SLinus Walleij di->ccm.original_iset_ua = bi->constant_charge_current_max_ua; 80483e5aa77SLinus Walleij di->ccm.current_iset_ua = bi->constant_charge_current_max_ua; 80583e5aa77SLinus Walleij di->ccm.max_current_ua = di->bm->maxi->chg_curr_ua; 806c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 807c5b64a99SLinus Walleij di->ccm.level = 0; 808c5b64a99SLinus Walleij } 809c5b64a99SLinus Walleij 810c5b64a99SLinus Walleij /** 811c5b64a99SLinus Walleij * ab8500_chargalg_chg_curr_maxim - increases the charger current to 812c5b64a99SLinus Walleij * compensate for the system load 813c5b64a99SLinus Walleij * @di pointer to the ab8500_chargalg structure 814c5b64a99SLinus Walleij * 815c5b64a99SLinus Walleij * This maximization function is used to raise the charger current to get the 816c5b64a99SLinus Walleij * battery current as close to the optimal value as possible. The battery 817c5b64a99SLinus Walleij * current during charging is affected by the system load 818c5b64a99SLinus Walleij */ 819c5b64a99SLinus Walleij static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di) 820c5b64a99SLinus Walleij { 82183e5aa77SLinus Walleij int delta_i_ua; 822c5b64a99SLinus Walleij 823c5b64a99SLinus Walleij if (!di->bm->maxi->ena_maxi) 824c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 825c5b64a99SLinus Walleij 82683e5aa77SLinus Walleij delta_i_ua = di->ccm.original_iset_ua - di->batt_data.inst_curr_ua; 827c5b64a99SLinus Walleij 828c5b64a99SLinus Walleij if (di->events.vbus_collapsed) { 829c5b64a99SLinus Walleij dev_dbg(di->dev, "Charger voltage has collapsed %d\n", 830c5b64a99SLinus Walleij di->ccm.wait_cnt); 831c5b64a99SLinus Walleij if (di->ccm.wait_cnt == 0) { 832c5b64a99SLinus Walleij dev_dbg(di->dev, "lowering current\n"); 833c5b64a99SLinus Walleij di->ccm.wait_cnt++; 834c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 835*05906f58SLinus Walleij di->ccm.max_current_ua = di->ccm.current_iset_ua; 83683e5aa77SLinus Walleij di->ccm.current_iset_ua = di->ccm.max_current_ua; 837c5b64a99SLinus Walleij di->ccm.level--; 838c5b64a99SLinus Walleij return MAXIM_RET_CHANGE; 839c5b64a99SLinus Walleij } else { 840c5b64a99SLinus Walleij dev_dbg(di->dev, "waiting\n"); 841c5b64a99SLinus Walleij /* Let's go in here twice before lowering curr again */ 842c5b64a99SLinus Walleij di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; 843c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 844c5b64a99SLinus Walleij } 845c5b64a99SLinus Walleij } 846c5b64a99SLinus Walleij 847c5b64a99SLinus Walleij di->ccm.wait_cnt = 0; 848c5b64a99SLinus Walleij 84983e5aa77SLinus Walleij if (di->batt_data.inst_curr_ua > di->ccm.original_iset_ua) { 85083e5aa77SLinus Walleij dev_dbg(di->dev, " Maximization Ibat (%duA) too high" 85183e5aa77SLinus Walleij " (limit %duA) (current iset: %duA)!\n", 85283e5aa77SLinus Walleij di->batt_data.inst_curr_ua, di->ccm.original_iset_ua, 85383e5aa77SLinus Walleij di->ccm.current_iset_ua); 854c5b64a99SLinus Walleij 85583e5aa77SLinus Walleij if (di->ccm.current_iset_ua == di->ccm.original_iset_ua) 856c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 857c5b64a99SLinus Walleij 858c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 85983e5aa77SLinus Walleij di->ccm.current_iset_ua = di->ccm.original_iset_ua; 860c5b64a99SLinus Walleij di->ccm.level = 0; 861c5b64a99SLinus Walleij 862c5b64a99SLinus Walleij return MAXIM_RET_IBAT_TOO_HIGH; 863c5b64a99SLinus Walleij } 864c5b64a99SLinus Walleij 865c5b64a99SLinus Walleij di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 866c5b64a99SLinus Walleij return MAXIM_RET_NOACTION; 867c5b64a99SLinus Walleij } 868c5b64a99SLinus Walleij 869c5b64a99SLinus Walleij static void handle_maxim_chg_curr(struct ab8500_chargalg *di) 870c5b64a99SLinus Walleij { 87125fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 872c5b64a99SLinus Walleij enum maxim_ret ret; 873c5b64a99SLinus Walleij int result; 874c5b64a99SLinus Walleij 875c5b64a99SLinus Walleij ret = ab8500_chargalg_chg_curr_maxim(di); 876c5b64a99SLinus Walleij switch (ret) { 877c5b64a99SLinus Walleij case MAXIM_RET_CHANGE: 878c5b64a99SLinus Walleij result = ab8500_chargalg_update_chg_curr(di, 87983e5aa77SLinus Walleij di->ccm.current_iset_ua); 880c5b64a99SLinus Walleij if (result) 881c5b64a99SLinus Walleij dev_err(di->dev, "failed to set chg curr\n"); 882c5b64a99SLinus Walleij break; 883c5b64a99SLinus Walleij case MAXIM_RET_IBAT_TOO_HIGH: 884c5b64a99SLinus Walleij result = ab8500_chargalg_update_chg_curr(di, 88583e5aa77SLinus Walleij bi->constant_charge_current_max_ua); 886c5b64a99SLinus Walleij if (result) 887c5b64a99SLinus Walleij dev_err(di->dev, "failed to set chg curr\n"); 888c5b64a99SLinus Walleij break; 889c5b64a99SLinus Walleij 890c5b64a99SLinus Walleij case MAXIM_RET_NOACTION: 891c5b64a99SLinus Walleij default: 892c5b64a99SLinus Walleij /* Do nothing..*/ 893c5b64a99SLinus Walleij break; 894c5b64a99SLinus Walleij } 895c5b64a99SLinus Walleij } 896c5b64a99SLinus Walleij 897c5b64a99SLinus Walleij static int ab8500_chargalg_get_ext_psy_data(struct device *dev, void *data) 898c5b64a99SLinus Walleij { 899c5b64a99SLinus Walleij struct power_supply *psy; 900c5b64a99SLinus Walleij struct power_supply *ext = dev_get_drvdata(dev); 901c5b64a99SLinus Walleij const char **supplicants = (const char **)ext->supplied_to; 902c5b64a99SLinus Walleij struct ab8500_chargalg *di; 903c5b64a99SLinus Walleij union power_supply_propval ret; 904c5b64a99SLinus Walleij int j; 905c5b64a99SLinus Walleij bool capacity_updated = false; 906c5b64a99SLinus Walleij 907c5b64a99SLinus Walleij psy = (struct power_supply *)data; 908c5b64a99SLinus Walleij di = power_supply_get_drvdata(psy); 909c5b64a99SLinus Walleij /* For all psy where the driver name appears in any supplied_to */ 910c5b64a99SLinus Walleij j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 911c5b64a99SLinus Walleij if (j < 0) 912c5b64a99SLinus Walleij return 0; 913c5b64a99SLinus Walleij 914c5b64a99SLinus Walleij /* 915c5b64a99SLinus Walleij * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its 916c5b64a99SLinus Walleij * property because of handling that sysfs entry on its own, this is 917c5b64a99SLinus Walleij * the place to get the battery capacity. 918c5b64a99SLinus Walleij */ 919c5b64a99SLinus Walleij if (!power_supply_get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { 920c5b64a99SLinus Walleij di->batt_data.percent = ret.intval; 921c5b64a99SLinus Walleij capacity_updated = true; 922c5b64a99SLinus Walleij } 923c5b64a99SLinus Walleij 924c5b64a99SLinus Walleij /* Go through all properties for the psy */ 925c5b64a99SLinus Walleij for (j = 0; j < ext->desc->num_properties; j++) { 926c5b64a99SLinus Walleij enum power_supply_property prop; 927c5b64a99SLinus Walleij prop = ext->desc->properties[j]; 928c5b64a99SLinus Walleij 929c5b64a99SLinus Walleij /* 930c5b64a99SLinus Walleij * Initialize chargers if not already done. 931c5b64a99SLinus Walleij * The ab8500_charger*/ 932c5b64a99SLinus Walleij if (!di->ac_chg && 933c5b64a99SLinus Walleij ext->desc->type == POWER_SUPPLY_TYPE_MAINS) 934c5b64a99SLinus Walleij di->ac_chg = psy_to_ux500_charger(ext); 935c5b64a99SLinus Walleij else if (!di->usb_chg && 936c5b64a99SLinus Walleij ext->desc->type == POWER_SUPPLY_TYPE_USB) 937c5b64a99SLinus Walleij di->usb_chg = psy_to_ux500_charger(ext); 938c5b64a99SLinus Walleij 939c5b64a99SLinus Walleij if (power_supply_get_property(ext, prop, &ret)) 940c5b64a99SLinus Walleij continue; 941c5b64a99SLinus Walleij switch (prop) { 942c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_PRESENT: 943c5b64a99SLinus Walleij switch (ext->desc->type) { 944c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 945c5b64a99SLinus Walleij /* Battery present */ 946c5b64a99SLinus Walleij if (ret.intval) 947c5b64a99SLinus Walleij di->events.batt_rem = false; 948c5b64a99SLinus Walleij /* Battery removed */ 949c5b64a99SLinus Walleij else 950c5b64a99SLinus Walleij di->events.batt_rem = true; 951c5b64a99SLinus Walleij break; 952c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 953c5b64a99SLinus Walleij /* AC disconnected */ 954c5b64a99SLinus Walleij if (!ret.intval && 955c5b64a99SLinus Walleij (di->chg_info.conn_chg & AC_CHG)) { 956c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 957c5b64a99SLinus Walleij di->chg_info.conn_chg; 958c5b64a99SLinus Walleij di->chg_info.conn_chg &= ~AC_CHG; 959c5b64a99SLinus Walleij } 960c5b64a99SLinus Walleij /* AC connected */ 961c5b64a99SLinus Walleij else if (ret.intval && 962c5b64a99SLinus Walleij !(di->chg_info.conn_chg & AC_CHG)) { 963c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 964c5b64a99SLinus Walleij di->chg_info.conn_chg; 965c5b64a99SLinus Walleij di->chg_info.conn_chg |= AC_CHG; 966c5b64a99SLinus Walleij } 967c5b64a99SLinus Walleij break; 968c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 969c5b64a99SLinus Walleij /* USB disconnected */ 970c5b64a99SLinus Walleij if (!ret.intval && 971c5b64a99SLinus Walleij (di->chg_info.conn_chg & USB_CHG)) { 972c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 973c5b64a99SLinus Walleij di->chg_info.conn_chg; 974c5b64a99SLinus Walleij di->chg_info.conn_chg &= ~USB_CHG; 975c5b64a99SLinus Walleij } 976c5b64a99SLinus Walleij /* USB connected */ 977c5b64a99SLinus Walleij else if (ret.intval && 978c5b64a99SLinus Walleij !(di->chg_info.conn_chg & USB_CHG)) { 979c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = 980c5b64a99SLinus Walleij di->chg_info.conn_chg; 981c5b64a99SLinus Walleij di->chg_info.conn_chg |= USB_CHG; 982c5b64a99SLinus Walleij } 983c5b64a99SLinus Walleij break; 984c5b64a99SLinus Walleij default: 985c5b64a99SLinus Walleij break; 986c5b64a99SLinus Walleij } 987c5b64a99SLinus Walleij break; 988c5b64a99SLinus Walleij 989c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_ONLINE: 990c5b64a99SLinus Walleij switch (ext->desc->type) { 991c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 992c5b64a99SLinus Walleij break; 993c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 994c5b64a99SLinus Walleij /* AC offline */ 995c5b64a99SLinus Walleij if (!ret.intval && 996c5b64a99SLinus Walleij (di->chg_info.online_chg & AC_CHG)) { 997c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 998c5b64a99SLinus Walleij di->chg_info.online_chg; 999c5b64a99SLinus Walleij di->chg_info.online_chg &= ~AC_CHG; 1000c5b64a99SLinus Walleij } 1001c5b64a99SLinus Walleij /* AC online */ 1002c5b64a99SLinus Walleij else if (ret.intval && 1003c5b64a99SLinus Walleij !(di->chg_info.online_chg & AC_CHG)) { 1004c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 1005c5b64a99SLinus Walleij di->chg_info.online_chg; 1006c5b64a99SLinus Walleij di->chg_info.online_chg |= AC_CHG; 1007c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1008c5b64a99SLinus Walleij &di->chargalg_wd_work, 0); 1009c5b64a99SLinus Walleij } 1010c5b64a99SLinus Walleij break; 1011c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1012c5b64a99SLinus Walleij /* USB offline */ 1013c5b64a99SLinus Walleij if (!ret.intval && 1014c5b64a99SLinus Walleij (di->chg_info.online_chg & USB_CHG)) { 1015c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 1016c5b64a99SLinus Walleij di->chg_info.online_chg; 1017c5b64a99SLinus Walleij di->chg_info.online_chg &= ~USB_CHG; 1018c5b64a99SLinus Walleij } 1019c5b64a99SLinus Walleij /* USB online */ 1020c5b64a99SLinus Walleij else if (ret.intval && 1021c5b64a99SLinus Walleij !(di->chg_info.online_chg & USB_CHG)) { 1022c5b64a99SLinus Walleij di->chg_info.prev_online_chg = 1023c5b64a99SLinus Walleij di->chg_info.online_chg; 1024c5b64a99SLinus Walleij di->chg_info.online_chg |= USB_CHG; 1025c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1026c5b64a99SLinus Walleij &di->chargalg_wd_work, 0); 1027c5b64a99SLinus Walleij } 1028c5b64a99SLinus Walleij break; 1029c5b64a99SLinus Walleij default: 1030c5b64a99SLinus Walleij break; 1031c5b64a99SLinus Walleij } 1032c5b64a99SLinus Walleij break; 1033c5b64a99SLinus Walleij 1034c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_HEALTH: 1035c5b64a99SLinus Walleij switch (ext->desc->type) { 1036c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 1037c5b64a99SLinus Walleij break; 1038c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1039c5b64a99SLinus Walleij switch (ret.intval) { 1040c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: 1041c5b64a99SLinus Walleij di->events.mainextchnotok = true; 1042c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1043c5b64a99SLinus Walleij di->events.main_ovv = false; 1044c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1045c5b64a99SLinus Walleij break; 1046c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_DEAD: 1047c5b64a99SLinus Walleij di->events.ac_wd_expired = true; 1048c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1049c5b64a99SLinus Walleij di->events.main_ovv = false; 1050c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1051c5b64a99SLinus Walleij break; 1052c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_COLD: 1053c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERHEAT: 1054c5b64a99SLinus Walleij di->events.main_thermal_prot = true; 1055c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1056c5b64a99SLinus Walleij di->events.main_ovv = false; 1057c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1058c5b64a99SLinus Walleij break; 1059c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERVOLTAGE: 1060c5b64a99SLinus Walleij di->events.main_ovv = true; 1061c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1062c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1063c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1064c5b64a99SLinus Walleij break; 1065c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_GOOD: 1066c5b64a99SLinus Walleij di->events.main_thermal_prot = false; 1067c5b64a99SLinus Walleij di->events.mainextchnotok = false; 1068c5b64a99SLinus Walleij di->events.main_ovv = false; 1069c5b64a99SLinus Walleij di->events.ac_wd_expired = false; 1070c5b64a99SLinus Walleij break; 1071c5b64a99SLinus Walleij default: 1072c5b64a99SLinus Walleij break; 1073c5b64a99SLinus Walleij } 1074c5b64a99SLinus Walleij break; 1075c5b64a99SLinus Walleij 1076c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1077c5b64a99SLinus Walleij switch (ret.intval) { 1078c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: 1079c5b64a99SLinus Walleij di->events.usbchargernotok = true; 1080c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1081c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1082c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1083c5b64a99SLinus Walleij break; 1084c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_DEAD: 1085c5b64a99SLinus Walleij di->events.usb_wd_expired = true; 1086c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1087c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1088c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1089c5b64a99SLinus Walleij break; 1090c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_COLD: 1091c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERHEAT: 1092c5b64a99SLinus Walleij di->events.usb_thermal_prot = true; 1093c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1094c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1095c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1096c5b64a99SLinus Walleij break; 1097c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_OVERVOLTAGE: 1098c5b64a99SLinus Walleij di->events.vbus_ovv = true; 1099c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1100c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1101c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1102c5b64a99SLinus Walleij break; 1103c5b64a99SLinus Walleij case POWER_SUPPLY_HEALTH_GOOD: 1104c5b64a99SLinus Walleij di->events.usbchargernotok = false; 1105c5b64a99SLinus Walleij di->events.usb_thermal_prot = false; 1106c5b64a99SLinus Walleij di->events.vbus_ovv = false; 1107c5b64a99SLinus Walleij di->events.usb_wd_expired = false; 1108c5b64a99SLinus Walleij break; 1109c5b64a99SLinus Walleij default: 1110c5b64a99SLinus Walleij break; 1111c5b64a99SLinus Walleij } 11124520dcbeSLinus Torvalds break; 1113c5b64a99SLinus Walleij default: 1114c5b64a99SLinus Walleij break; 1115c5b64a99SLinus Walleij } 1116c5b64a99SLinus Walleij break; 1117c5b64a99SLinus Walleij 1118c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_VOLTAGE_NOW: 1119c5b64a99SLinus Walleij switch (ext->desc->type) { 1120c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 11212a5f4183SLinus Walleij di->batt_data.volt_uv = ret.intval; 1122c5b64a99SLinus Walleij break; 1123c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1124bc6e0287SLinus Walleij di->chg_info.ac_volt_uv = ret.intval; 1125c5b64a99SLinus Walleij break; 1126c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1127bc6e0287SLinus Walleij di->chg_info.usb_volt_uv = ret.intval; 1128c5b64a99SLinus Walleij break; 1129c5b64a99SLinus Walleij default: 1130c5b64a99SLinus Walleij break; 1131c5b64a99SLinus Walleij } 1132c5b64a99SLinus Walleij break; 1133c5b64a99SLinus Walleij 1134c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_VOLTAGE_AVG: 1135c5b64a99SLinus Walleij switch (ext->desc->type) { 1136c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 1137c5b64a99SLinus Walleij /* AVG is used to indicate when we are 1138c5b64a99SLinus Walleij * in CV mode */ 1139c5b64a99SLinus Walleij if (ret.intval) 1140c5b64a99SLinus Walleij di->events.ac_cv_active = true; 1141c5b64a99SLinus Walleij else 1142c5b64a99SLinus Walleij di->events.ac_cv_active = false; 1143c5b64a99SLinus Walleij 1144c5b64a99SLinus Walleij break; 1145c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1146c5b64a99SLinus Walleij /* AVG is used to indicate when we are 1147c5b64a99SLinus Walleij * in CV mode */ 1148c5b64a99SLinus Walleij if (ret.intval) 1149c5b64a99SLinus Walleij di->events.usb_cv_active = true; 1150c5b64a99SLinus Walleij else 1151c5b64a99SLinus Walleij di->events.usb_cv_active = false; 1152c5b64a99SLinus Walleij 1153c5b64a99SLinus Walleij break; 1154c5b64a99SLinus Walleij default: 1155c5b64a99SLinus Walleij break; 1156c5b64a99SLinus Walleij } 1157c5b64a99SLinus Walleij break; 1158c5b64a99SLinus Walleij 1159c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_TECHNOLOGY: 1160c5b64a99SLinus Walleij switch (ext->desc->type) { 1161c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 1162c5b64a99SLinus Walleij if (ret.intval) 1163c5b64a99SLinus Walleij di->events.batt_unknown = false; 1164c5b64a99SLinus Walleij else 1165c5b64a99SLinus Walleij di->events.batt_unknown = true; 1166c5b64a99SLinus Walleij 1167c5b64a99SLinus Walleij break; 1168c5b64a99SLinus Walleij default: 1169c5b64a99SLinus Walleij break; 1170c5b64a99SLinus Walleij } 1171c5b64a99SLinus Walleij break; 1172c5b64a99SLinus Walleij 1173c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_TEMP: 1174c5b64a99SLinus Walleij di->batt_data.temp = ret.intval / 10; 1175c5b64a99SLinus Walleij break; 1176c5b64a99SLinus Walleij 1177c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CURRENT_NOW: 1178c5b64a99SLinus Walleij switch (ext->desc->type) { 1179c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_MAINS: 118083e5aa77SLinus Walleij di->chg_info.ac_curr_ua = ret.intval; 1181c5b64a99SLinus Walleij break; 1182c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 118383e5aa77SLinus Walleij di->chg_info.usb_curr_ua = ret.intval; 1184c5b64a99SLinus Walleij break; 1185c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 118683e5aa77SLinus Walleij di->batt_data.inst_curr_ua = ret.intval; 1187c5b64a99SLinus Walleij break; 1188c5b64a99SLinus Walleij default: 1189c5b64a99SLinus Walleij break; 1190c5b64a99SLinus Walleij } 1191c5b64a99SLinus Walleij break; 1192c5b64a99SLinus Walleij 1193c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CURRENT_AVG: 1194c5b64a99SLinus Walleij switch (ext->desc->type) { 1195c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_BATTERY: 11969c20899dSLinus Walleij di->batt_data.avg_curr_ua = ret.intval; 1197c5b64a99SLinus Walleij break; 1198c5b64a99SLinus Walleij case POWER_SUPPLY_TYPE_USB: 1199c5b64a99SLinus Walleij if (ret.intval) 1200c5b64a99SLinus Walleij di->events.vbus_collapsed = true; 1201c5b64a99SLinus Walleij else 1202c5b64a99SLinus Walleij di->events.vbus_collapsed = false; 1203c5b64a99SLinus Walleij break; 1204c5b64a99SLinus Walleij default: 1205c5b64a99SLinus Walleij break; 1206c5b64a99SLinus Walleij } 1207c5b64a99SLinus Walleij break; 1208c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_CAPACITY: 1209c5b64a99SLinus Walleij if (!capacity_updated) 1210c5b64a99SLinus Walleij di->batt_data.percent = ret.intval; 1211c5b64a99SLinus Walleij break; 1212c5b64a99SLinus Walleij default: 1213c5b64a99SLinus Walleij break; 1214c5b64a99SLinus Walleij } 1215c5b64a99SLinus Walleij } 1216c5b64a99SLinus Walleij return 0; 1217c5b64a99SLinus Walleij } 1218c5b64a99SLinus Walleij 1219c5b64a99SLinus Walleij /** 1220c5b64a99SLinus Walleij * ab8500_chargalg_external_power_changed() - callback for power supply changes 1221c5b64a99SLinus Walleij * @psy: pointer to the structure power_supply 1222c5b64a99SLinus Walleij * 1223c5b64a99SLinus Walleij * This function is the entry point of the pointer external_power_changed 1224c5b64a99SLinus Walleij * of the structure power_supply. 1225c5b64a99SLinus Walleij * This function gets executed when there is a change in any external power 1226c5b64a99SLinus Walleij * supply that this driver needs to be notified of. 1227c5b64a99SLinus Walleij */ 1228c5b64a99SLinus Walleij static void ab8500_chargalg_external_power_changed(struct power_supply *psy) 1229c5b64a99SLinus Walleij { 1230c5b64a99SLinus Walleij struct ab8500_chargalg *di = power_supply_get_drvdata(psy); 1231c5b64a99SLinus Walleij 1232c5b64a99SLinus Walleij /* 1233c5b64a99SLinus Walleij * Trigger execution of the algorithm instantly and read 1234c5b64a99SLinus Walleij * all power_supply properties there instead 1235c5b64a99SLinus Walleij */ 1236661d10eeSLinus Walleij if (di->chargalg_wq) 1237c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 1238c5b64a99SLinus Walleij } 1239c5b64a99SLinus Walleij 1240c5b64a99SLinus Walleij /** 1241c5b64a99SLinus Walleij * ab8500_chargalg_algorithm() - Main function for the algorithm 1242c5b64a99SLinus Walleij * @di: pointer to the ab8500_chargalg structure 1243c5b64a99SLinus Walleij * 1244c5b64a99SLinus Walleij * This is the main control function for the charging algorithm. 1245c5b64a99SLinus Walleij * It is called periodically or when something happens that will 1246c5b64a99SLinus Walleij * trigger a state change 1247c5b64a99SLinus Walleij */ 1248c5b64a99SLinus Walleij static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di) 1249c5b64a99SLinus Walleij { 125025fd3303SLinus Walleij struct power_supply_battery_info *bi = di->bm->bi; 1251c5b64a99SLinus Walleij int charger_status; 1252c5b64a99SLinus Walleij int ret; 1253c5b64a99SLinus Walleij 1254c5b64a99SLinus Walleij /* Collect data from all power_supply class devices */ 1255c5b64a99SLinus Walleij class_for_each_device(power_supply_class, NULL, 1256c5b64a99SLinus Walleij di->chargalg_psy, ab8500_chargalg_get_ext_psy_data); 1257c5b64a99SLinus Walleij 1258c5b64a99SLinus Walleij ab8500_chargalg_end_of_charge(di); 1259c5b64a99SLinus Walleij ab8500_chargalg_check_temp(di); 1260c5b64a99SLinus Walleij ab8500_chargalg_check_charger_voltage(di); 1261c5b64a99SLinus Walleij 1262c5b64a99SLinus Walleij charger_status = ab8500_chargalg_check_charger_connection(di); 1263c5b64a99SLinus Walleij 1264c5b64a99SLinus Walleij if (is_ab8500(di->parent)) { 1265c5b64a99SLinus Walleij ret = ab8500_chargalg_check_charger_enable(di); 1266c5b64a99SLinus Walleij if (ret < 0) 1267c5b64a99SLinus Walleij dev_err(di->dev, "Checking charger is enabled error" 1268c5b64a99SLinus Walleij ": Returned Value %d\n", ret); 1269c5b64a99SLinus Walleij } 1270c5b64a99SLinus Walleij 1271c5b64a99SLinus Walleij /* 1272c5b64a99SLinus Walleij * First check if we have a charger connected. 1273c5b64a99SLinus Walleij * Also we don't allow charging of unknown batteries if configured 1274c5b64a99SLinus Walleij * this way 1275c5b64a99SLinus Walleij */ 1276c5b64a99SLinus Walleij if (!charger_status || 1277c5b64a99SLinus Walleij (di->events.batt_unknown && !di->bm->chg_unknown_bat)) { 1278c5b64a99SLinus Walleij if (di->charge_state != STATE_HANDHELD) { 1279c5b64a99SLinus Walleij di->events.safety_timer_expired = false; 1280c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD_INIT); 1281c5b64a99SLinus Walleij } 1282c5b64a99SLinus Walleij } 1283c5b64a99SLinus Walleij 1284c5b64a99SLinus Walleij /* If suspended, we should not continue checking the flags */ 1285c5b64a99SLinus Walleij else if (di->charge_state == STATE_SUSPENDED_INIT || 1286c5b64a99SLinus Walleij di->charge_state == STATE_SUSPENDED) { 1287c5b64a99SLinus Walleij /* We don't do anything here, just don,t continue */ 1288c5b64a99SLinus Walleij } 1289c5b64a99SLinus Walleij 1290c5b64a99SLinus Walleij /* Safety timer expiration */ 1291c5b64a99SLinus Walleij else if (di->events.safety_timer_expired) { 1292c5b64a99SLinus Walleij if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) 1293c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1294c5b64a99SLinus Walleij STATE_SAFETY_TIMER_EXPIRED_INIT); 1295c5b64a99SLinus Walleij } 1296c5b64a99SLinus Walleij /* 1297c5b64a99SLinus Walleij * Check if any interrupts has occured 1298c5b64a99SLinus Walleij * that will prevent us from charging 1299c5b64a99SLinus Walleij */ 1300c5b64a99SLinus Walleij 1301c5b64a99SLinus Walleij /* Battery removed */ 1302c5b64a99SLinus Walleij else if (di->events.batt_rem) { 1303c5b64a99SLinus Walleij if (di->charge_state != STATE_BATT_REMOVED) 1304c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); 1305c5b64a99SLinus Walleij } 1306c5b64a99SLinus Walleij /* Main or USB charger not ok. */ 1307c5b64a99SLinus Walleij else if (di->events.mainextchnotok || di->events.usbchargernotok) { 1308c5b64a99SLinus Walleij /* 1309c5b64a99SLinus Walleij * If vbus_collapsed is set, we have to lower the charger 1310c5b64a99SLinus Walleij * current, which is done in the normal state below 1311c5b64a99SLinus Walleij */ 1312c5b64a99SLinus Walleij if (di->charge_state != STATE_CHG_NOT_OK && 1313c5b64a99SLinus Walleij !di->events.vbus_collapsed) 1314c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); 1315c5b64a99SLinus Walleij } 1316c5b64a99SLinus Walleij /* VBUS, Main or VBAT OVV. */ 1317c5b64a99SLinus Walleij else if (di->events.vbus_ovv || 1318c5b64a99SLinus Walleij di->events.main_ovv || 1319c5b64a99SLinus Walleij di->events.batt_ovv || 1320c5b64a99SLinus Walleij !di->chg_info.usb_chg_ok || 1321c5b64a99SLinus Walleij !di->chg_info.ac_chg_ok) { 1322c5b64a99SLinus Walleij if (di->charge_state != STATE_OVV_PROTECT) 1323c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); 1324c5b64a99SLinus Walleij } 1325c5b64a99SLinus Walleij /* USB Thermal, stop charging */ 1326c5b64a99SLinus Walleij else if (di->events.main_thermal_prot || 1327c5b64a99SLinus Walleij di->events.usb_thermal_prot) { 1328c5b64a99SLinus Walleij if (di->charge_state != STATE_HW_TEMP_PROTECT) 1329c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1330c5b64a99SLinus Walleij STATE_HW_TEMP_PROTECT_INIT); 1331c5b64a99SLinus Walleij } 1332c5b64a99SLinus Walleij /* Battery temp over/under */ 1333c5b64a99SLinus Walleij else if (di->events.btemp_underover) { 1334c5b64a99SLinus Walleij if (di->charge_state != STATE_TEMP_UNDEROVER) 1335c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1336c5b64a99SLinus Walleij STATE_TEMP_UNDEROVER_INIT); 1337c5b64a99SLinus Walleij } 1338c5b64a99SLinus Walleij /* Watchdog expired */ 1339c5b64a99SLinus Walleij else if (di->events.ac_wd_expired || 1340c5b64a99SLinus Walleij di->events.usb_wd_expired) { 1341c5b64a99SLinus Walleij if (di->charge_state != STATE_WD_EXPIRED) 1342c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); 1343c5b64a99SLinus Walleij } 1344c5b64a99SLinus Walleij /* Battery temp high/low */ 1345c5b64a99SLinus Walleij else if (di->events.btemp_lowhigh) { 1346c5b64a99SLinus Walleij if (di->charge_state != STATE_TEMP_LOWHIGH) 1347c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); 1348c5b64a99SLinus Walleij } 1349c5b64a99SLinus Walleij 1350c5b64a99SLinus Walleij dev_dbg(di->dev, 1351c5b64a99SLinus Walleij "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " 1352c5b64a99SLinus Walleij "State %s Active_chg %d Chg_status %d AC %d USB %d " 1353c5b64a99SLinus Walleij "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " 1354c5b64a99SLinus Walleij "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", 13552a5f4183SLinus Walleij di->batt_data.volt_uv, 13569c20899dSLinus Walleij di->batt_data.avg_curr_ua, 135783e5aa77SLinus Walleij di->batt_data.inst_curr_ua, 1358c5b64a99SLinus Walleij di->batt_data.temp, 1359c5b64a99SLinus Walleij di->batt_data.percent, 1360c5b64a99SLinus Walleij di->maintenance_chg, 1361c5b64a99SLinus Walleij states[di->charge_state], 1362c5b64a99SLinus Walleij di->chg_info.charger_type, 1363c5b64a99SLinus Walleij di->charge_status, 1364c5b64a99SLinus Walleij di->chg_info.conn_chg & AC_CHG, 1365c5b64a99SLinus Walleij di->chg_info.conn_chg & USB_CHG, 1366c5b64a99SLinus Walleij di->chg_info.online_chg & AC_CHG, 1367c5b64a99SLinus Walleij di->chg_info.online_chg & USB_CHG, 1368c5b64a99SLinus Walleij di->events.ac_cv_active, 1369c5b64a99SLinus Walleij di->events.usb_cv_active, 137083e5aa77SLinus Walleij di->chg_info.ac_curr_ua, 137183e5aa77SLinus Walleij di->chg_info.usb_curr_ua, 1372bc6e0287SLinus Walleij di->chg_info.ac_vset_uv, 137383e5aa77SLinus Walleij di->chg_info.ac_iset_ua, 1374bc6e0287SLinus Walleij di->chg_info.usb_vset_uv, 137583e5aa77SLinus Walleij di->chg_info.usb_iset_ua); 1376c5b64a99SLinus Walleij 1377c5b64a99SLinus Walleij switch (di->charge_state) { 1378c5b64a99SLinus Walleij case STATE_HANDHELD_INIT: 1379c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1380c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 1381c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HANDHELD); 1382c5b64a99SLinus Walleij fallthrough; 1383c5b64a99SLinus Walleij 1384c5b64a99SLinus Walleij case STATE_HANDHELD: 1385c5b64a99SLinus Walleij break; 1386c5b64a99SLinus Walleij 1387c5b64a99SLinus Walleij case STATE_SUSPENDED_INIT: 1388c5b64a99SLinus Walleij if (di->susp_status.ac_suspended) 1389c5b64a99SLinus Walleij ab8500_chargalg_ac_en(di, false, 0, 0); 1390c5b64a99SLinus Walleij if (di->susp_status.usb_suspended) 1391c5b64a99SLinus Walleij ab8500_chargalg_usb_en(di, false, 0, 0); 1392c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 1393c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1394c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 1395c5b64a99SLinus Walleij di->maintenance_chg = false; 1396c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_SUSPENDED); 1397c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1398c5b64a99SLinus Walleij fallthrough; 1399c5b64a99SLinus Walleij 1400c5b64a99SLinus Walleij case STATE_SUSPENDED: 1401c5b64a99SLinus Walleij /* CHARGING is suspended */ 1402c5b64a99SLinus Walleij break; 1403c5b64a99SLinus Walleij 1404c5b64a99SLinus Walleij case STATE_BATT_REMOVED_INIT: 1405c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1406c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_BATT_REMOVED); 1407c5b64a99SLinus Walleij fallthrough; 1408c5b64a99SLinus Walleij 1409c5b64a99SLinus Walleij case STATE_BATT_REMOVED: 1410c5b64a99SLinus Walleij if (!di->events.batt_rem) 1411c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1412c5b64a99SLinus Walleij break; 1413c5b64a99SLinus Walleij 1414c5b64a99SLinus Walleij case STATE_HW_TEMP_PROTECT_INIT: 1415c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1416c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); 1417c5b64a99SLinus Walleij fallthrough; 1418c5b64a99SLinus Walleij 1419c5b64a99SLinus Walleij case STATE_HW_TEMP_PROTECT: 1420c5b64a99SLinus Walleij if (!di->events.main_thermal_prot && 1421c5b64a99SLinus Walleij !di->events.usb_thermal_prot) 1422c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1423c5b64a99SLinus Walleij break; 1424c5b64a99SLinus Walleij 1425c5b64a99SLinus Walleij case STATE_OVV_PROTECT_INIT: 1426c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1427c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_OVV_PROTECT); 1428c5b64a99SLinus Walleij fallthrough; 1429c5b64a99SLinus Walleij 1430c5b64a99SLinus Walleij case STATE_OVV_PROTECT: 1431c5b64a99SLinus Walleij if (!di->events.vbus_ovv && 1432c5b64a99SLinus Walleij !di->events.main_ovv && 1433c5b64a99SLinus Walleij !di->events.batt_ovv && 1434c5b64a99SLinus Walleij di->chg_info.usb_chg_ok && 1435c5b64a99SLinus Walleij di->chg_info.ac_chg_ok) 1436c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1437c5b64a99SLinus Walleij break; 1438c5b64a99SLinus Walleij 1439c5b64a99SLinus Walleij case STATE_CHG_NOT_OK_INIT: 1440c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1441c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_CHG_NOT_OK); 1442c5b64a99SLinus Walleij fallthrough; 1443c5b64a99SLinus Walleij 1444c5b64a99SLinus Walleij case STATE_CHG_NOT_OK: 1445c5b64a99SLinus Walleij if (!di->events.mainextchnotok && 1446c5b64a99SLinus Walleij !di->events.usbchargernotok) 1447c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1448c5b64a99SLinus Walleij break; 1449c5b64a99SLinus Walleij 1450c5b64a99SLinus Walleij case STATE_SAFETY_TIMER_EXPIRED_INIT: 1451c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1452c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); 1453c5b64a99SLinus Walleij fallthrough; 1454c5b64a99SLinus Walleij 1455c5b64a99SLinus Walleij case STATE_SAFETY_TIMER_EXPIRED: 1456c5b64a99SLinus Walleij /* We exit this state when charger is removed */ 1457c5b64a99SLinus Walleij break; 1458c5b64a99SLinus Walleij 1459c5b64a99SLinus Walleij case STATE_NORMAL_INIT: 1460*05906f58SLinus Walleij if (bi->constant_charge_current_max_ua == 0) 1461*05906f58SLinus Walleij /* "charging" with 0 uA */ 1462c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1463c5b64a99SLinus Walleij else { 1464c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1465bc6e0287SLinus Walleij bi->constant_charge_voltage_max_uv, 1466*05906f58SLinus Walleij bi->constant_charge_current_max_ua); 1467c5b64a99SLinus Walleij } 1468c5b64a99SLinus Walleij 1469c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL); 1470c5b64a99SLinus Walleij ab8500_chargalg_start_safety_timer(di); 1471c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1472c5b64a99SLinus Walleij init_maxim_chg_curr(di); 1473c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 1474c5b64a99SLinus Walleij di->eoc_cnt = 0; 1475c5b64a99SLinus Walleij di->maintenance_chg = false; 1476c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1477c5b64a99SLinus Walleij 1478c5b64a99SLinus Walleij break; 1479c5b64a99SLinus Walleij 1480c5b64a99SLinus Walleij case STATE_NORMAL: 1481c5b64a99SLinus Walleij handle_maxim_chg_curr(di); 1482c5b64a99SLinus Walleij if (di->charge_status == POWER_SUPPLY_STATUS_FULL && 1483c5b64a99SLinus Walleij di->maintenance_chg) { 1484c5b64a99SLinus Walleij if (di->bm->no_maintenance) 1485c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1486c5b64a99SLinus Walleij STATE_WAIT_FOR_RECHARGE_INIT); 1487c5b64a99SLinus Walleij else 1488c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, 1489c5b64a99SLinus Walleij STATE_MAINTENANCE_A_INIT); 1490c5b64a99SLinus Walleij } 1491c5b64a99SLinus Walleij break; 1492c5b64a99SLinus Walleij 1493c5b64a99SLinus Walleij /* This state will be used when the maintenance state is disabled */ 1494c5b64a99SLinus Walleij case STATE_WAIT_FOR_RECHARGE_INIT: 1495c5b64a99SLinus Walleij ab8500_chargalg_hold_charging(di); 1496c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); 1497c5b64a99SLinus Walleij fallthrough; 1498c5b64a99SLinus Walleij 1499c5b64a99SLinus Walleij case STATE_WAIT_FOR_RECHARGE: 15001091ed7dSLinus Walleij if (di->batt_data.percent <= AB8500_RECHARGE_CAP) 1501c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1502c5b64a99SLinus Walleij break; 1503c5b64a99SLinus Walleij 1504c5b64a99SLinus Walleij case STATE_MAINTENANCE_A_INIT: 1505c5b64a99SLinus Walleij ab8500_chargalg_stop_safety_timer(di); 1506c5b64a99SLinus Walleij ab8500_chargalg_start_maintenance_timer(di, 1507e5dff305SLinus Walleij di->bm->bat_type->maint_a_chg_timer_h); 1508c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1509e5dff305SLinus Walleij di->bm->bat_type->maint_a_vol_lvl, 1510e5dff305SLinus Walleij di->bm->bat_type->maint_a_cur_lvl); 1511c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_A); 1512c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1513c5b64a99SLinus Walleij fallthrough; 1514c5b64a99SLinus Walleij 1515c5b64a99SLinus Walleij case STATE_MAINTENANCE_A: 1516c5b64a99SLinus Walleij if (di->events.maintenance_timer_expired) { 1517c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1518c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); 1519c5b64a99SLinus Walleij } 1520c5b64a99SLinus Walleij break; 1521c5b64a99SLinus Walleij 1522c5b64a99SLinus Walleij case STATE_MAINTENANCE_B_INIT: 1523c5b64a99SLinus Walleij ab8500_chargalg_start_maintenance_timer(di, 1524e5dff305SLinus Walleij di->bm->bat_type->maint_b_chg_timer_h); 1525c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1526e5dff305SLinus Walleij di->bm->bat_type->maint_b_vol_lvl, 1527e5dff305SLinus Walleij di->bm->bat_type->maint_b_cur_lvl); 1528c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_MAINTENANCE_B); 1529c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1530c5b64a99SLinus Walleij fallthrough; 1531c5b64a99SLinus Walleij 1532c5b64a99SLinus Walleij case STATE_MAINTENANCE_B: 1533c5b64a99SLinus Walleij if (di->events.maintenance_timer_expired) { 1534c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1535c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1536c5b64a99SLinus Walleij } 1537c5b64a99SLinus Walleij break; 1538c5b64a99SLinus Walleij 1539c5b64a99SLinus Walleij case STATE_TEMP_LOWHIGH_INIT: 1540c5b64a99SLinus Walleij ab8500_chargalg_start_charging(di, 1541e5dff305SLinus Walleij di->bm->bat_type->low_high_vol_lvl, 1542e5dff305SLinus Walleij di->bm->bat_type->low_high_cur_lvl); 1543c5b64a99SLinus Walleij ab8500_chargalg_stop_maintenance_timer(di); 1544c5b64a99SLinus Walleij di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 1545c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); 1546c5b64a99SLinus Walleij power_supply_changed(di->chargalg_psy); 1547c5b64a99SLinus Walleij fallthrough; 1548c5b64a99SLinus Walleij 1549c5b64a99SLinus Walleij case STATE_TEMP_LOWHIGH: 1550c5b64a99SLinus Walleij if (!di->events.btemp_lowhigh) 1551c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1552c5b64a99SLinus Walleij break; 1553c5b64a99SLinus Walleij 1554c5b64a99SLinus Walleij case STATE_WD_EXPIRED_INIT: 1555c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1556c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_WD_EXPIRED); 1557c5b64a99SLinus Walleij fallthrough; 1558c5b64a99SLinus Walleij 1559c5b64a99SLinus Walleij case STATE_WD_EXPIRED: 1560c5b64a99SLinus Walleij if (!di->events.ac_wd_expired && 1561c5b64a99SLinus Walleij !di->events.usb_wd_expired) 1562c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1563c5b64a99SLinus Walleij break; 1564c5b64a99SLinus Walleij 1565c5b64a99SLinus Walleij case STATE_TEMP_UNDEROVER_INIT: 1566c5b64a99SLinus Walleij ab8500_chargalg_stop_charging(di); 1567c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); 1568c5b64a99SLinus Walleij fallthrough; 1569c5b64a99SLinus Walleij 1570c5b64a99SLinus Walleij case STATE_TEMP_UNDEROVER: 1571c5b64a99SLinus Walleij if (!di->events.btemp_underover) 1572c5b64a99SLinus Walleij ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); 1573c5b64a99SLinus Walleij break; 1574c5b64a99SLinus Walleij } 1575c5b64a99SLinus Walleij 1576c5b64a99SLinus Walleij /* Start charging directly if the new state is a charge state */ 1577c5b64a99SLinus Walleij if (di->charge_state == STATE_NORMAL_INIT || 1578c5b64a99SLinus Walleij di->charge_state == STATE_MAINTENANCE_A_INIT || 1579c5b64a99SLinus Walleij di->charge_state == STATE_MAINTENANCE_B_INIT) 1580c5b64a99SLinus Walleij queue_work(di->chargalg_wq, &di->chargalg_work); 1581c5b64a99SLinus Walleij } 1582c5b64a99SLinus Walleij 1583c5b64a99SLinus Walleij /** 1584c5b64a99SLinus Walleij * ab8500_chargalg_periodic_work() - Periodic work for the algorithm 1585c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1586c5b64a99SLinus Walleij * 1587c5b64a99SLinus Walleij * Work queue function for the charging algorithm 1588c5b64a99SLinus Walleij */ 1589c5b64a99SLinus Walleij static void ab8500_chargalg_periodic_work(struct work_struct *work) 1590c5b64a99SLinus Walleij { 1591c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1592c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_periodic_work.work); 1593c5b64a99SLinus Walleij 1594c5b64a99SLinus Walleij ab8500_chargalg_algorithm(di); 1595c5b64a99SLinus Walleij 1596c5b64a99SLinus Walleij /* 1597c5b64a99SLinus Walleij * If a charger is connected then the battery has to be monitored 1598c5b64a99SLinus Walleij * frequently, else the work can be delayed. 1599c5b64a99SLinus Walleij */ 1600c5b64a99SLinus Walleij if (di->chg_info.conn_chg) 1601c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1602c5b64a99SLinus Walleij &di->chargalg_periodic_work, 1603c5b64a99SLinus Walleij di->bm->interval_charging * HZ); 1604c5b64a99SLinus Walleij else 1605c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1606c5b64a99SLinus Walleij &di->chargalg_periodic_work, 1607c5b64a99SLinus Walleij di->bm->interval_not_charging * HZ); 1608c5b64a99SLinus Walleij } 1609c5b64a99SLinus Walleij 1610c5b64a99SLinus Walleij /** 1611c5b64a99SLinus Walleij * ab8500_chargalg_wd_work() - periodic work to kick the charger watchdog 1612c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1613c5b64a99SLinus Walleij * 1614c5b64a99SLinus Walleij * Work queue function for kicking the charger watchdog 1615c5b64a99SLinus Walleij */ 1616c5b64a99SLinus Walleij static void ab8500_chargalg_wd_work(struct work_struct *work) 1617c5b64a99SLinus Walleij { 1618c5b64a99SLinus Walleij int ret; 1619c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1620c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_wd_work.work); 1621c5b64a99SLinus Walleij 1622c5b64a99SLinus Walleij ret = ab8500_chargalg_kick_watchdog(di); 1623c5b64a99SLinus Walleij if (ret < 0) 1624c5b64a99SLinus Walleij dev_err(di->dev, "failed to kick watchdog\n"); 1625c5b64a99SLinus Walleij 1626c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, 1627c5b64a99SLinus Walleij &di->chargalg_wd_work, CHG_WD_INTERVAL); 1628c5b64a99SLinus Walleij } 1629c5b64a99SLinus Walleij 1630c5b64a99SLinus Walleij /** 1631c5b64a99SLinus Walleij * ab8500_chargalg_work() - Work to run the charging algorithm instantly 1632c5b64a99SLinus Walleij * @work: pointer to the work_struct structure 1633c5b64a99SLinus Walleij * 1634c5b64a99SLinus Walleij * Work queue function for calling the charging algorithm 1635c5b64a99SLinus Walleij */ 1636c5b64a99SLinus Walleij static void ab8500_chargalg_work(struct work_struct *work) 1637c5b64a99SLinus Walleij { 1638c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(work, 1639c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_work); 1640c5b64a99SLinus Walleij 1641c5b64a99SLinus Walleij ab8500_chargalg_algorithm(di); 1642c5b64a99SLinus Walleij } 1643c5b64a99SLinus Walleij 1644c5b64a99SLinus Walleij /** 1645c5b64a99SLinus Walleij * ab8500_chargalg_get_property() - get the chargalg properties 1646c5b64a99SLinus Walleij * @psy: pointer to the power_supply structure 1647c5b64a99SLinus Walleij * @psp: pointer to the power_supply_property structure 1648c5b64a99SLinus Walleij * @val: pointer to the power_supply_propval union 1649c5b64a99SLinus Walleij * 1650c5b64a99SLinus Walleij * This function gets called when an application tries to get the 1651c5b64a99SLinus Walleij * chargalg properties by reading the sysfs files. 1652c5b64a99SLinus Walleij * status: charging/discharging/full/unknown 1653c5b64a99SLinus Walleij * health: health of the battery 1654c5b64a99SLinus Walleij * Returns error code in case of failure else 0 on success 1655c5b64a99SLinus Walleij */ 1656c5b64a99SLinus Walleij static int ab8500_chargalg_get_property(struct power_supply *psy, 1657c5b64a99SLinus Walleij enum power_supply_property psp, 1658c5b64a99SLinus Walleij union power_supply_propval *val) 1659c5b64a99SLinus Walleij { 1660c5b64a99SLinus Walleij struct ab8500_chargalg *di = power_supply_get_drvdata(psy); 1661c5b64a99SLinus Walleij 1662c5b64a99SLinus Walleij switch (psp) { 1663c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_STATUS: 1664c5b64a99SLinus Walleij val->intval = di->charge_status; 1665c5b64a99SLinus Walleij break; 1666c5b64a99SLinus Walleij case POWER_SUPPLY_PROP_HEALTH: 1667c5b64a99SLinus Walleij if (di->events.batt_ovv) { 1668c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 1669c5b64a99SLinus Walleij } else if (di->events.btemp_underover) { 167025fd3303SLinus Walleij if (di->batt_data.temp <= di->bm->bi->temp_min) 1671c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_COLD; 1672c5b64a99SLinus Walleij else 1673c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; 1674c5b64a99SLinus Walleij } else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED || 1675c5b64a99SLinus Walleij di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) { 1676c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 1677c5b64a99SLinus Walleij } else { 1678c5b64a99SLinus Walleij val->intval = POWER_SUPPLY_HEALTH_GOOD; 1679c5b64a99SLinus Walleij } 1680c5b64a99SLinus Walleij break; 1681c5b64a99SLinus Walleij default: 1682c5b64a99SLinus Walleij return -EINVAL; 1683c5b64a99SLinus Walleij } 1684c5b64a99SLinus Walleij return 0; 1685c5b64a99SLinus Walleij } 1686c5b64a99SLinus Walleij 1687c5b64a99SLinus Walleij /* Exposure to the sysfs interface */ 1688c5b64a99SLinus Walleij 1689c5b64a99SLinus Walleij static ssize_t ab8500_chargalg_en_show(struct ab8500_chargalg *di, 1690c5b64a99SLinus Walleij char *buf) 1691c5b64a99SLinus Walleij { 1692c5b64a99SLinus Walleij return sprintf(buf, "%d\n", 1693c5b64a99SLinus Walleij di->susp_status.ac_suspended && 1694c5b64a99SLinus Walleij di->susp_status.usb_suspended); 1695c5b64a99SLinus Walleij } 1696c5b64a99SLinus Walleij 1697c5b64a99SLinus Walleij static ssize_t ab8500_chargalg_en_store(struct ab8500_chargalg *di, 1698c5b64a99SLinus Walleij const char *buf, size_t length) 1699c5b64a99SLinus Walleij { 170038334231SColin Ian King long param; 1701c5b64a99SLinus Walleij int ac_usb; 1702c5b64a99SLinus Walleij int ret; 1703c5b64a99SLinus Walleij 1704c5b64a99SLinus Walleij ret = kstrtol(buf, 10, ¶m); 1705c5b64a99SLinus Walleij if (ret < 0) 1706c5b64a99SLinus Walleij return ret; 1707c5b64a99SLinus Walleij 1708c5b64a99SLinus Walleij ac_usb = param; 1709c5b64a99SLinus Walleij switch (ac_usb) { 1710c5b64a99SLinus Walleij case 0: 1711c5b64a99SLinus Walleij /* Disable charging */ 1712c5b64a99SLinus Walleij di->susp_status.ac_suspended = true; 1713c5b64a99SLinus Walleij di->susp_status.usb_suspended = true; 1714c5b64a99SLinus Walleij di->susp_status.suspended_change = true; 1715c5b64a99SLinus Walleij /* Trigger a state change */ 1716c5b64a99SLinus Walleij queue_work(di->chargalg_wq, 1717c5b64a99SLinus Walleij &di->chargalg_work); 1718c5b64a99SLinus Walleij break; 1719c5b64a99SLinus Walleij case 1: 1720c5b64a99SLinus Walleij /* Enable AC Charging */ 1721c5b64a99SLinus Walleij di->susp_status.ac_suspended = false; 1722c5b64a99SLinus Walleij di->susp_status.suspended_change = true; 1723c5b64a99SLinus Walleij /* Trigger a state change */ 1724c5b64a99SLinus Walleij queue_work(di->chargalg_wq, 1725c5b64a99SLinus Walleij &di->chargalg_work); 1726c5b64a99SLinus Walleij break; 1727c5b64a99SLinus Walleij case 2: 1728c5b64a99SLinus Walleij /* Enable USB charging */ 1729c5b64a99SLinus Walleij di->susp_status.usb_suspended = false; 1730c5b64a99SLinus Walleij di->susp_status.suspended_change = true; 1731c5b64a99SLinus Walleij /* Trigger a state change */ 1732c5b64a99SLinus Walleij queue_work(di->chargalg_wq, 1733c5b64a99SLinus Walleij &di->chargalg_work); 1734c5b64a99SLinus Walleij break; 1735c5b64a99SLinus Walleij default: 1736c5b64a99SLinus Walleij dev_info(di->dev, "Wrong input\n" 1737c5b64a99SLinus Walleij "Enter 0. Disable AC/USB Charging\n" 1738c5b64a99SLinus Walleij "1. Enable AC charging\n" 1739c5b64a99SLinus Walleij "2. Enable USB Charging\n"); 1740c5b64a99SLinus Walleij } 1741c5b64a99SLinus Walleij return strlen(buf); 1742c5b64a99SLinus Walleij } 1743c5b64a99SLinus Walleij 1744c5b64a99SLinus Walleij static struct ab8500_chargalg_sysfs_entry ab8500_chargalg_en_charger = 1745c5b64a99SLinus Walleij __ATTR(chargalg, 0644, ab8500_chargalg_en_show, 1746c5b64a99SLinus Walleij ab8500_chargalg_en_store); 1747c5b64a99SLinus Walleij 1748c5b64a99SLinus Walleij static ssize_t ab8500_chargalg_sysfs_show(struct kobject *kobj, 1749c5b64a99SLinus Walleij struct attribute *attr, char *buf) 1750c5b64a99SLinus Walleij { 1751c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry *entry = container_of(attr, 1752c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry, attr); 1753c5b64a99SLinus Walleij 1754c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(kobj, 1755c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_kobject); 1756c5b64a99SLinus Walleij 1757c5b64a99SLinus Walleij if (!entry->show) 1758c5b64a99SLinus Walleij return -EIO; 1759c5b64a99SLinus Walleij 1760c5b64a99SLinus Walleij return entry->show(di, buf); 1761c5b64a99SLinus Walleij } 1762c5b64a99SLinus Walleij 1763c5b64a99SLinus Walleij static ssize_t ab8500_chargalg_sysfs_charger(struct kobject *kobj, 1764c5b64a99SLinus Walleij struct attribute *attr, const char *buf, size_t length) 1765c5b64a99SLinus Walleij { 1766c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry *entry = container_of(attr, 1767c5b64a99SLinus Walleij struct ab8500_chargalg_sysfs_entry, attr); 1768c5b64a99SLinus Walleij 1769c5b64a99SLinus Walleij struct ab8500_chargalg *di = container_of(kobj, 1770c5b64a99SLinus Walleij struct ab8500_chargalg, chargalg_kobject); 1771c5b64a99SLinus Walleij 1772c5b64a99SLinus Walleij if (!entry->store) 1773c5b64a99SLinus Walleij return -EIO; 1774c5b64a99SLinus Walleij 1775c5b64a99SLinus Walleij return entry->store(di, buf, length); 1776c5b64a99SLinus Walleij } 1777c5b64a99SLinus Walleij 1778c5b64a99SLinus Walleij static struct attribute *ab8500_chargalg_chg[] = { 1779c5b64a99SLinus Walleij &ab8500_chargalg_en_charger.attr, 1780c5b64a99SLinus Walleij NULL, 1781c5b64a99SLinus Walleij }; 1782c5b64a99SLinus Walleij 1783c5b64a99SLinus Walleij static const struct sysfs_ops ab8500_chargalg_sysfs_ops = { 1784c5b64a99SLinus Walleij .show = ab8500_chargalg_sysfs_show, 1785c5b64a99SLinus Walleij .store = ab8500_chargalg_sysfs_charger, 1786c5b64a99SLinus Walleij }; 1787c5b64a99SLinus Walleij 1788c5b64a99SLinus Walleij static struct kobj_type ab8500_chargalg_ktype = { 1789c5b64a99SLinus Walleij .sysfs_ops = &ab8500_chargalg_sysfs_ops, 1790c5b64a99SLinus Walleij .default_attrs = ab8500_chargalg_chg, 1791c5b64a99SLinus Walleij }; 1792c5b64a99SLinus Walleij 1793c5b64a99SLinus Walleij /** 1794c5b64a99SLinus Walleij * ab8500_chargalg_sysfs_exit() - de-init of sysfs entry 1795c5b64a99SLinus Walleij * @di: pointer to the struct ab8500_chargalg 1796c5b64a99SLinus Walleij * 1797c5b64a99SLinus Walleij * This function removes the entry in sysfs. 1798c5b64a99SLinus Walleij */ 1799c5b64a99SLinus Walleij static void ab8500_chargalg_sysfs_exit(struct ab8500_chargalg *di) 1800c5b64a99SLinus Walleij { 1801c5b64a99SLinus Walleij kobject_del(&di->chargalg_kobject); 1802c5b64a99SLinus Walleij } 1803c5b64a99SLinus Walleij 1804c5b64a99SLinus Walleij /** 1805c5b64a99SLinus Walleij * ab8500_chargalg_sysfs_init() - init of sysfs entry 1806c5b64a99SLinus Walleij * @di: pointer to the struct ab8500_chargalg 1807c5b64a99SLinus Walleij * 1808c5b64a99SLinus Walleij * This function adds an entry in sysfs. 1809c5b64a99SLinus Walleij * Returns error code in case of failure else 0(on success) 1810c5b64a99SLinus Walleij */ 1811c5b64a99SLinus Walleij static int ab8500_chargalg_sysfs_init(struct ab8500_chargalg *di) 1812c5b64a99SLinus Walleij { 1813c5b64a99SLinus Walleij int ret = 0; 1814c5b64a99SLinus Walleij 1815c5b64a99SLinus Walleij ret = kobject_init_and_add(&di->chargalg_kobject, 1816c5b64a99SLinus Walleij &ab8500_chargalg_ktype, 1817c5b64a99SLinus Walleij NULL, "ab8500_chargalg"); 1818c5b64a99SLinus Walleij if (ret < 0) 1819c5b64a99SLinus Walleij dev_err(di->dev, "failed to create sysfs entry\n"); 1820c5b64a99SLinus Walleij 1821c5b64a99SLinus Walleij return ret; 1822c5b64a99SLinus Walleij } 1823c5b64a99SLinus Walleij /* Exposure to the sysfs interface <<END>> */ 1824c5b64a99SLinus Walleij 1825c5b64a99SLinus Walleij static int __maybe_unused ab8500_chargalg_resume(struct device *dev) 1826c5b64a99SLinus Walleij { 1827c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1828c5b64a99SLinus Walleij 1829c5b64a99SLinus Walleij /* Kick charger watchdog if charging (any charger online) */ 1830c5b64a99SLinus Walleij if (di->chg_info.online_chg) 1831c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); 1832c5b64a99SLinus Walleij 1833c5b64a99SLinus Walleij /* 1834c5b64a99SLinus Walleij * Run the charging algorithm directly to be sure we don't 1835c5b64a99SLinus Walleij * do it too seldom 1836c5b64a99SLinus Walleij */ 1837c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); 1838c5b64a99SLinus Walleij 1839c5b64a99SLinus Walleij return 0; 1840c5b64a99SLinus Walleij } 1841c5b64a99SLinus Walleij 1842c5b64a99SLinus Walleij static int __maybe_unused ab8500_chargalg_suspend(struct device *dev) 1843c5b64a99SLinus Walleij { 1844c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1845c5b64a99SLinus Walleij 1846c5b64a99SLinus Walleij if (di->chg_info.online_chg) 1847c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_wd_work); 1848c5b64a99SLinus Walleij 1849c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_periodic_work); 1850c5b64a99SLinus Walleij 1851c5b64a99SLinus Walleij return 0; 1852c5b64a99SLinus Walleij } 1853c5b64a99SLinus Walleij 1854c5b64a99SLinus Walleij static char *supply_interface[] = { 1855c5b64a99SLinus Walleij "ab8500_fg", 1856c5b64a99SLinus Walleij }; 1857c5b64a99SLinus Walleij 1858c5b64a99SLinus Walleij static const struct power_supply_desc ab8500_chargalg_desc = { 1859661d10eeSLinus Walleij .name = "ab8500_chargalg", 1860c5b64a99SLinus Walleij .type = POWER_SUPPLY_TYPE_BATTERY, 1861c5b64a99SLinus Walleij .properties = ab8500_chargalg_props, 1862c5b64a99SLinus Walleij .num_properties = ARRAY_SIZE(ab8500_chargalg_props), 1863c5b64a99SLinus Walleij .get_property = ab8500_chargalg_get_property, 1864c5b64a99SLinus Walleij .external_power_changed = ab8500_chargalg_external_power_changed, 1865c5b64a99SLinus Walleij }; 1866c5b64a99SLinus Walleij 1867c5b64a99SLinus Walleij static int ab8500_chargalg_bind(struct device *dev, struct device *master, 1868c5b64a99SLinus Walleij void *data) 1869c5b64a99SLinus Walleij { 1870c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1871c5b64a99SLinus Walleij 1872c5b64a99SLinus Walleij /* Create a work queue for the chargalg */ 1873c5b64a99SLinus Walleij di->chargalg_wq = alloc_ordered_workqueue("ab8500_chargalg_wq", 1874c5b64a99SLinus Walleij WQ_MEM_RECLAIM); 1875c5b64a99SLinus Walleij if (di->chargalg_wq == NULL) { 1876c5b64a99SLinus Walleij dev_err(di->dev, "failed to create work queue\n"); 1877c5b64a99SLinus Walleij return -ENOMEM; 1878c5b64a99SLinus Walleij } 1879c5b64a99SLinus Walleij 1880c5b64a99SLinus Walleij /* Run the charging algorithm */ 1881c5b64a99SLinus Walleij queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); 1882c5b64a99SLinus Walleij 1883c5b64a99SLinus Walleij return 0; 1884c5b64a99SLinus Walleij } 1885c5b64a99SLinus Walleij 1886c5b64a99SLinus Walleij static void ab8500_chargalg_unbind(struct device *dev, struct device *master, 1887c5b64a99SLinus Walleij void *data) 1888c5b64a99SLinus Walleij { 1889c5b64a99SLinus Walleij struct ab8500_chargalg *di = dev_get_drvdata(dev); 1890c5b64a99SLinus Walleij 1891c5b64a99SLinus Walleij /* Stop all timers and work */ 1892c5b64a99SLinus Walleij hrtimer_cancel(&di->safety_timer); 1893c5b64a99SLinus Walleij hrtimer_cancel(&di->maintenance_timer); 1894c5b64a99SLinus Walleij 1895c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_periodic_work); 1896c5b64a99SLinus Walleij cancel_delayed_work_sync(&di->chargalg_wd_work); 1897c5b64a99SLinus Walleij cancel_work_sync(&di->chargalg_work); 1898c5b64a99SLinus Walleij 1899c5b64a99SLinus Walleij /* Delete the work queue */ 1900c5b64a99SLinus Walleij destroy_workqueue(di->chargalg_wq); 1901c5b64a99SLinus Walleij flush_scheduled_work(); 1902c5b64a99SLinus Walleij } 1903c5b64a99SLinus Walleij 1904c5b64a99SLinus Walleij static const struct component_ops ab8500_chargalg_component_ops = { 1905c5b64a99SLinus Walleij .bind = ab8500_chargalg_bind, 1906c5b64a99SLinus Walleij .unbind = ab8500_chargalg_unbind, 1907c5b64a99SLinus Walleij }; 1908c5b64a99SLinus Walleij 1909c5b64a99SLinus Walleij static int ab8500_chargalg_probe(struct platform_device *pdev) 1910c5b64a99SLinus Walleij { 1911c5b64a99SLinus Walleij struct device *dev = &pdev->dev; 1912c5b64a99SLinus Walleij struct power_supply_config psy_cfg = {}; 1913c5b64a99SLinus Walleij struct ab8500_chargalg *di; 1914c5b64a99SLinus Walleij int ret = 0; 1915c5b64a99SLinus Walleij 1916c5b64a99SLinus Walleij di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 1917c5b64a99SLinus Walleij if (!di) 1918c5b64a99SLinus Walleij return -ENOMEM; 1919c5b64a99SLinus Walleij 1920c5b64a99SLinus Walleij di->bm = &ab8500_bm_data; 1921c5b64a99SLinus Walleij 1922c5b64a99SLinus Walleij /* get device struct and parent */ 1923c5b64a99SLinus Walleij di->dev = dev; 1924c5b64a99SLinus Walleij di->parent = dev_get_drvdata(pdev->dev.parent); 1925c5b64a99SLinus Walleij 1926c5b64a99SLinus Walleij psy_cfg.supplied_to = supply_interface; 1927c5b64a99SLinus Walleij psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 1928c5b64a99SLinus Walleij psy_cfg.drv_data = di; 1929c5b64a99SLinus Walleij 1930c5b64a99SLinus Walleij /* Initilialize safety timer */ 1931c5b64a99SLinus Walleij hrtimer_init(&di->safety_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 1932c5b64a99SLinus Walleij di->safety_timer.function = ab8500_chargalg_safety_timer_expired; 1933c5b64a99SLinus Walleij 1934c5b64a99SLinus Walleij /* Initilialize maintenance timer */ 1935c5b64a99SLinus Walleij hrtimer_init(&di->maintenance_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); 1936c5b64a99SLinus Walleij di->maintenance_timer.function = 1937c5b64a99SLinus Walleij ab8500_chargalg_maintenance_timer_expired; 1938c5b64a99SLinus Walleij 1939c5b64a99SLinus Walleij /* Init work for chargalg */ 1940c5b64a99SLinus Walleij INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work, 1941c5b64a99SLinus Walleij ab8500_chargalg_periodic_work); 1942c5b64a99SLinus Walleij INIT_DEFERRABLE_WORK(&di->chargalg_wd_work, 1943c5b64a99SLinus Walleij ab8500_chargalg_wd_work); 1944c5b64a99SLinus Walleij 1945c5b64a99SLinus Walleij /* Init work for chargalg */ 1946c5b64a99SLinus Walleij INIT_WORK(&di->chargalg_work, ab8500_chargalg_work); 1947c5b64a99SLinus Walleij 1948c5b64a99SLinus Walleij /* To detect charger at startup */ 1949c5b64a99SLinus Walleij di->chg_info.prev_conn_chg = -1; 1950c5b64a99SLinus Walleij 1951c5b64a99SLinus Walleij /* Register chargalg power supply class */ 1952c5b64a99SLinus Walleij di->chargalg_psy = devm_power_supply_register(di->dev, 1953c5b64a99SLinus Walleij &ab8500_chargalg_desc, 1954c5b64a99SLinus Walleij &psy_cfg); 1955c5b64a99SLinus Walleij if (IS_ERR(di->chargalg_psy)) { 1956c5b64a99SLinus Walleij dev_err(di->dev, "failed to register chargalg psy\n"); 1957c5b64a99SLinus Walleij return PTR_ERR(di->chargalg_psy); 1958c5b64a99SLinus Walleij } 1959c5b64a99SLinus Walleij 1960c5b64a99SLinus Walleij platform_set_drvdata(pdev, di); 1961c5b64a99SLinus Walleij 1962c5b64a99SLinus Walleij /* sysfs interface to enable/disable charging from user space */ 1963c5b64a99SLinus Walleij ret = ab8500_chargalg_sysfs_init(di); 1964c5b64a99SLinus Walleij if (ret) { 1965c5b64a99SLinus Walleij dev_err(di->dev, "failed to create sysfs entry\n"); 1966c5b64a99SLinus Walleij return ret; 1967c5b64a99SLinus Walleij } 1968c5b64a99SLinus Walleij 1969c5b64a99SLinus Walleij dev_info(di->dev, "probe success\n"); 1970c5b64a99SLinus Walleij return component_add(dev, &ab8500_chargalg_component_ops); 1971c5b64a99SLinus Walleij } 1972c5b64a99SLinus Walleij 1973c5b64a99SLinus Walleij static int ab8500_chargalg_remove(struct platform_device *pdev) 1974c5b64a99SLinus Walleij { 1975c5b64a99SLinus Walleij struct ab8500_chargalg *di = platform_get_drvdata(pdev); 1976c5b64a99SLinus Walleij 1977c5b64a99SLinus Walleij component_del(&pdev->dev, &ab8500_chargalg_component_ops); 1978c5b64a99SLinus Walleij 1979c5b64a99SLinus Walleij /* sysfs interface to enable/disable charging from user space */ 1980c5b64a99SLinus Walleij ab8500_chargalg_sysfs_exit(di); 1981c5b64a99SLinus Walleij 1982c5b64a99SLinus Walleij return 0; 1983c5b64a99SLinus Walleij } 1984c5b64a99SLinus Walleij 1985c5b64a99SLinus Walleij static SIMPLE_DEV_PM_OPS(ab8500_chargalg_pm_ops, ab8500_chargalg_suspend, ab8500_chargalg_resume); 1986c5b64a99SLinus Walleij 1987c5b64a99SLinus Walleij static const struct of_device_id ab8500_chargalg_match[] = { 1988c5b64a99SLinus Walleij { .compatible = "stericsson,ab8500-chargalg", }, 1989c5b64a99SLinus Walleij { }, 1990c5b64a99SLinus Walleij }; 1991c5b64a99SLinus Walleij 1992c5b64a99SLinus Walleij struct platform_driver ab8500_chargalg_driver = { 1993c5b64a99SLinus Walleij .probe = ab8500_chargalg_probe, 1994c5b64a99SLinus Walleij .remove = ab8500_chargalg_remove, 1995c5b64a99SLinus Walleij .driver = { 1996c5b64a99SLinus Walleij .name = "ab8500_chargalg", 1997c5b64a99SLinus Walleij .of_match_table = ab8500_chargalg_match, 1998c5b64a99SLinus Walleij .pm = &ab8500_chargalg_pm_ops, 1999c5b64a99SLinus Walleij }, 2000c5b64a99SLinus Walleij }; 2001c5b64a99SLinus Walleij MODULE_LICENSE("GPL v2"); 2002c5b64a99SLinus Walleij MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); 2003c5b64a99SLinus Walleij MODULE_ALIAS("platform:ab8500-chargalg"); 2004c5b64a99SLinus Walleij MODULE_DESCRIPTION("ab8500 battery charging algorithm"); 2005