diff options
author | Sebastian Reichel <sre@kernel.org> | 2016-06-17 13:54:32 +0200 |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2016-08-11 01:11:03 +0200 |
commit | 8c0984e5a75337df513047ec92a6c09d78e3e5cd (patch) | |
tree | a2fc0a0dd7c7c40d9379bdd1c2b279c0959d0e1f /drivers/power/abx500_chargalg.c | |
parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) |
power: move power supply drivers to power/supply
This moves all power supply drivers from drivers/power/
to drivers/power/supply/. The intention is a cleaner
source tree, since drivers/power/ also contains frameworks
unrelated to power supply, like adaptive voltage scaling.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power/abx500_chargalg.c')
-rw-r--r-- | drivers/power/abx500_chargalg.c | 2166 |
1 files changed, 0 insertions, 2166 deletions
diff --git a/drivers/power/abx500_chargalg.c b/drivers/power/abx500_chargalg.c deleted file mode 100644 index d9104b1ab7cf..000000000000 --- a/drivers/power/abx500_chargalg.c +++ /dev/null @@ -1,2166 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2012 - * Copyright (c) 2012 Sony Mobile Communications AB - * - * Charging algorithm driver for abx500 variants - * - * License Terms: GNU General Public License v2 - * Authors: - * Johan Palsson <johan.palsson@stericsson.com> - * Karl Komierowski <karl.komierowski@stericsson.com> - * Arun R Murthy <arun.murthy@stericsson.com> - * Author: Imre Sunyi <imre.sunyi@sonymobile.com> - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/hrtimer.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/power_supply.h> -#include <linux/completion.h> -#include <linux/workqueue.h> -#include <linux/kobject.h> -#include <linux/of.h> -#include <linux/mfd/core.h> -#include <linux/mfd/abx500.h> -#include <linux/mfd/abx500/ab8500.h> -#include <linux/mfd/abx500/ux500_chargalg.h> -#include <linux/mfd/abx500/ab8500-bm.h> -#include <linux/notifier.h> - -/* Watchdog kick interval */ -#define CHG_WD_INTERVAL (6 * HZ) - -/* End-of-charge criteria counter */ -#define EOC_COND_CNT 10 - -/* One hour expressed in seconds */ -#define ONE_HOUR_IN_SECONDS 3600 - -/* Five minutes expressed in seconds */ -#define FIVE_MINUTES_IN_SECONDS 300 - -/* Plus margin for the low battery threshold */ -#define BAT_PLUS_MARGIN (100) - -#define CHARGALG_CURR_STEP_LOW 0 -#define CHARGALG_CURR_STEP_HIGH 100 - -enum abx500_chargers { - NO_CHG, - AC_CHG, - USB_CHG, -}; - -struct abx500_chargalg_charger_info { - enum abx500_chargers conn_chg; - enum abx500_chargers prev_conn_chg; - enum abx500_chargers online_chg; - enum abx500_chargers prev_online_chg; - enum abx500_chargers charger_type; - bool usb_chg_ok; - bool ac_chg_ok; - int usb_volt; - int usb_curr; - int ac_volt; - int ac_curr; - int usb_vset; - int usb_iset; - int ac_vset; - int ac_iset; -}; - -struct abx500_chargalg_suspension_status { - bool suspended_change; - bool ac_suspended; - bool usb_suspended; -}; - -struct abx500_chargalg_current_step_status { - bool curr_step_change; - int curr_step; -}; - -struct abx500_chargalg_battery_data { - int temp; - int volt; - int avg_curr; - int inst_curr; - int percent; -}; - -enum abx500_chargalg_states { - STATE_HANDHELD_INIT, - STATE_HANDHELD, - STATE_CHG_NOT_OK_INIT, - STATE_CHG_NOT_OK, - STATE_HW_TEMP_PROTECT_INIT, - STATE_HW_TEMP_PROTECT, - STATE_NORMAL_INIT, - STATE_USB_PP_PRE_CHARGE, - STATE_NORMAL, - STATE_WAIT_FOR_RECHARGE_INIT, - STATE_WAIT_FOR_RECHARGE, - STATE_MAINTENANCE_A_INIT, - STATE_MAINTENANCE_A, - STATE_MAINTENANCE_B_INIT, - STATE_MAINTENANCE_B, - STATE_TEMP_UNDEROVER_INIT, - STATE_TEMP_UNDEROVER, - STATE_TEMP_LOWHIGH_INIT, - STATE_TEMP_LOWHIGH, - STATE_SUSPENDED_INIT, - STATE_SUSPENDED, - STATE_OVV_PROTECT_INIT, - STATE_OVV_PROTECT, - STATE_SAFETY_TIMER_EXPIRED_INIT, - STATE_SAFETY_TIMER_EXPIRED, - STATE_BATT_REMOVED_INIT, - STATE_BATT_REMOVED, - STATE_WD_EXPIRED_INIT, - STATE_WD_EXPIRED, -}; - -static const char *states[] = { - "HANDHELD_INIT", - "HANDHELD", - "CHG_NOT_OK_INIT", - "CHG_NOT_OK", - "HW_TEMP_PROTECT_INIT", - "HW_TEMP_PROTECT", - "NORMAL_INIT", - "USB_PP_PRE_CHARGE", - "NORMAL", - "WAIT_FOR_RECHARGE_INIT", - "WAIT_FOR_RECHARGE", - "MAINTENANCE_A_INIT", - "MAINTENANCE_A", - "MAINTENANCE_B_INIT", - "MAINTENANCE_B", - "TEMP_UNDEROVER_INIT", - "TEMP_UNDEROVER", - "TEMP_LOWHIGH_INIT", - "TEMP_LOWHIGH", - "SUSPENDED_INIT", - "SUSPENDED", - "OVV_PROTECT_INIT", - "OVV_PROTECT", - "SAFETY_TIMER_EXPIRED_INIT", - "SAFETY_TIMER_EXPIRED", - "BATT_REMOVED_INIT", - "BATT_REMOVED", - "WD_EXPIRED_INIT", - "WD_EXPIRED", -}; - -struct abx500_chargalg_events { - bool batt_unknown; - bool mainextchnotok; - bool batt_ovv; - bool batt_rem; - bool btemp_underover; - bool btemp_lowhigh; - bool main_thermal_prot; - bool usb_thermal_prot; - bool main_ovv; - bool vbus_ovv; - bool usbchargernotok; - bool safety_timer_expired; - bool maintenance_timer_expired; - bool ac_wd_expired; - bool usb_wd_expired; - bool ac_cv_active; - bool usb_cv_active; - bool vbus_collapsed; -}; - -/** - * struct abx500_charge_curr_maximization - Charger maximization parameters - * @original_iset: the non optimized/maximised charger current - * @current_iset: the charging current used at this moment - * @test_delta_i: the delta between the current we want to charge and the - current that is really going into the battery - * @condition_cnt: number of iterations needed before a new charger current - is set - * @max_current: maximum charger current - * @wait_cnt: to avoid too fast current step down in case of charger - * voltage collapse, we insert this delay between step - * down - * @level: tells in how many steps the charging current has been - increased - */ -struct abx500_charge_curr_maximization { - int original_iset; - int current_iset; - int test_delta_i; - int condition_cnt; - int max_current; - int wait_cnt; - u8 level; -}; - -enum maxim_ret { - MAXIM_RET_NOACTION, - MAXIM_RET_CHANGE, - MAXIM_RET_IBAT_TOO_HIGH, -}; - -/** - * struct abx500_chargalg - abx500 Charging algorithm device information - * @dev: pointer to the structure device - * @charge_status: battery operating status - * @eoc_cnt: counter used to determine end-of_charge - * @maintenance_chg: indicate if maintenance charge is active - * @t_hyst_norm temperature hysteresis when the temperature has been - * over or under normal limits - * @t_hyst_lowhigh temperature hysteresis when the temperature has been - * over or under the high or low limits - * @charge_state: current state of the charging algorithm - * @ccm charging current maximization parameters - * @chg_info: information about connected charger types - * @batt_data: data of the battery - * @susp_status: current charger suspension status - * @bm: Platform specific battery management information - * @curr_status: Current step status for over-current protection - * @parent: pointer to the struct abx500 - * @chargalg_psy: structure that holds the battery properties exposed by - * the charging algorithm - * @events: structure for information about events triggered - * @chargalg_wq: work queue for running the charging algorithm - * @chargalg_periodic_work: work to run the charging algorithm periodically - * @chargalg_wd_work: work to kick the charger watchdog periodically - * @chargalg_work: work to run the charging algorithm instantly - * @safety_timer: charging safety timer - * @maintenance_timer: maintenance charging timer - * @chargalg_kobject: structure of type kobject - */ -struct abx500_chargalg { - struct device *dev; - int charge_status; - int eoc_cnt; - bool maintenance_chg; - int t_hyst_norm; - int t_hyst_lowhigh; - enum abx500_chargalg_states charge_state; - struct abx500_charge_curr_maximization ccm; - struct abx500_chargalg_charger_info chg_info; - struct abx500_chargalg_battery_data batt_data; - struct abx500_chargalg_suspension_status susp_status; - struct ab8500 *parent; - struct abx500_chargalg_current_step_status curr_status; - struct abx500_bm_data *bm; - struct power_supply *chargalg_psy; - struct ux500_charger *ac_chg; - struct ux500_charger *usb_chg; - struct abx500_chargalg_events events; - struct workqueue_struct *chargalg_wq; - struct delayed_work chargalg_periodic_work; - struct delayed_work chargalg_wd_work; - struct work_struct chargalg_work; - struct hrtimer safety_timer; - struct hrtimer maintenance_timer; - struct kobject chargalg_kobject; -}; - -/*External charger prepare notifier*/ -BLOCKING_NOTIFIER_HEAD(charger_notifier_list); - -/* Main battery properties */ -static enum power_supply_property abx500_chargalg_props[] = { - POWER_SUPPLY_PROP_STATUS, - POWER_SUPPLY_PROP_HEALTH, -}; - -struct abx500_chargalg_sysfs_entry { - struct attribute attr; - ssize_t (*show)(struct abx500_chargalg *, char *); - ssize_t (*store)(struct abx500_chargalg *, const char *, size_t); -}; - -/** - * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer - * @timer: pointer to the hrtimer structure - * - * This function gets called when the safety timer for the charger - * expires - */ -static enum hrtimer_restart -abx500_chargalg_safety_timer_expired(struct hrtimer *timer) -{ - struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, - safety_timer); - dev_err(di->dev, "Safety timer expired\n"); - di->events.safety_timer_expired = true; - - /* Trigger execution of the algorithm instantly */ - queue_work(di->chargalg_wq, &di->chargalg_work); - - return HRTIMER_NORESTART; -} - -/** - * abx500_chargalg_maintenance_timer_expired() - Expiration of - * the maintenance timer - * @timer: pointer to the timer structure - * - * This function gets called when the maintenence timer - * expires - */ -static enum hrtimer_restart -abx500_chargalg_maintenance_timer_expired(struct hrtimer *timer) -{ - - struct abx500_chargalg *di = container_of(timer, struct abx500_chargalg, - maintenance_timer); - - dev_dbg(di->dev, "Maintenance timer expired\n"); - di->events.maintenance_timer_expired = true; - - /* Trigger execution of the algorithm instantly */ - queue_work(di->chargalg_wq, &di->chargalg_work); - - return HRTIMER_NORESTART; -} - -/** - * abx500_chargalg_state_to() - Change charge state - * @di: pointer to the abx500_chargalg structure - * - * This function gets called when a charge state change should occur - */ -static void abx500_chargalg_state_to(struct abx500_chargalg *di, - enum abx500_chargalg_states state) -{ - dev_dbg(di->dev, - "State changed: %s (From state: [%d] %s =to=> [%d] %s )\n", - di->charge_state == state ? "NO" : "YES", - di->charge_state, - states[di->charge_state], - state, - states[state]); - - di->charge_state = state; -} - -static int abx500_chargalg_check_charger_enable(struct abx500_chargalg *di) -{ - switch (di->charge_state) { - case STATE_NORMAL: - case STATE_MAINTENANCE_A: - case STATE_MAINTENANCE_B: - break; - default: - return 0; - } - - if (di->chg_info.charger_type & USB_CHG) { - return di->usb_chg->ops.check_enable(di->usb_chg, - di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, - di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); - } else if ((di->chg_info.charger_type & AC_CHG) && - !(di->ac_chg->external)) { - return di->ac_chg->ops.check_enable(di->ac_chg, - di->bm->bat_type[di->bm->batt_id].normal_vol_lvl, - di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); - } - return 0; -} - -/** - * abx500_chargalg_check_charger_connection() - Check charger connection change - * @di: pointer to the abx500_chargalg structure - * - * This function will check if there is a change in the charger connection - * and change charge state accordingly. AC has precedence over USB. - */ -static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di) -{ - if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg || - di->susp_status.suspended_change) { - /* - * Charger state changed or suspension - * has changed since last update - */ - if ((di->chg_info.conn_chg & AC_CHG) && - !di->susp_status.ac_suspended) { - dev_dbg(di->dev, "Charging source is AC\n"); - if (di->chg_info.charger_type != AC_CHG) { - di->chg_info.charger_type = AC_CHG; - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - } - } else if ((di->chg_info.conn_chg & USB_CHG) && - !di->susp_status.usb_suspended) { - dev_dbg(di->dev, "Charging source is USB\n"); - di->chg_info.charger_type = USB_CHG; - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - } else if (di->chg_info.conn_chg && - (di->susp_status.ac_suspended || - di->susp_status.usb_suspended)) { - dev_dbg(di->dev, "Charging is suspended\n"); - di->chg_info.charger_type = NO_CHG; - abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT); - } else { - dev_dbg(di->dev, "Charging source is OFF\n"); - di->chg_info.charger_type = NO_CHG; - abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); - } - di->chg_info.prev_conn_chg = di->chg_info.conn_chg; - di->susp_status.suspended_change = false; - } - return di->chg_info.conn_chg; -} - -/** - * abx500_chargalg_check_current_step_status() - Check charging current - * step status. - * @di: pointer to the abx500_chargalg structure - * - * This function will check if there is a change in the charging current step - * and change charge state accordingly. - */ -static void abx500_chargalg_check_current_step_status - (struct abx500_chargalg *di) -{ - if (di->curr_status.curr_step_change) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - di->curr_status.curr_step_change = false; -} - -/** - * abx500_chargalg_start_safety_timer() - Start charging safety timer - * @di: pointer to the abx500_chargalg structure - * - * The safety timer is used to avoid overcharging of old or bad batteries. - * There are different timers for AC and USB - */ -static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di) -{ - /* Charger-dependent expiration time in hours*/ - int timer_expiration = 0; - - switch (di->chg_info.charger_type) { - case AC_CHG: - timer_expiration = di->bm->main_safety_tmr_h; - break; - - case USB_CHG: - timer_expiration = di->bm->usb_safety_tmr_h; - break; - - default: - dev_err(di->dev, "Unknown charger to charge from\n"); - break; - } - - di->events.safety_timer_expired = false; - hrtimer_set_expires_range(&di->safety_timer, - ktime_set(timer_expiration * ONE_HOUR_IN_SECONDS, 0), - ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); - hrtimer_start_expires(&di->safety_timer, HRTIMER_MODE_REL); -} - -/** - * abx500_chargalg_stop_safety_timer() - Stop charging safety timer - * @di: pointer to the abx500_chargalg structure - * - * The safety timer is stopped whenever the NORMAL state is exited - */ -static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di) -{ - if (hrtimer_try_to_cancel(&di->safety_timer) >= 0) - di->events.safety_timer_expired = false; -} - -/** - * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer - * @di: pointer to the abx500_chargalg structure - * @duration: duration of ther maintenance timer in hours - * - * The maintenance timer is used to maintain the charge in the battery once - * the battery is considered full. These timers are chosen to match the - * discharge curve of the battery - */ -static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di, - int duration) -{ - hrtimer_set_expires_range(&di->maintenance_timer, - ktime_set(duration * ONE_HOUR_IN_SECONDS, 0), - ktime_set(FIVE_MINUTES_IN_SECONDS, 0)); - di->events.maintenance_timer_expired = false; - hrtimer_start_expires(&di->maintenance_timer, HRTIMER_MODE_REL); -} - -/** - * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer - * @di: pointer to the abx500_chargalg structure - * - * The maintenance timer is stopped whenever maintenance ends or when another - * state is entered - */ -static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di) -{ - if (hrtimer_try_to_cancel(&di->maintenance_timer) >= 0) - di->events.maintenance_timer_expired = false; -} - -/** - * abx500_chargalg_kick_watchdog() - Kick charger watchdog - * @di: pointer to the abx500_chargalg structure - * - * The charger watchdog have to be kicked periodically whenever the charger is - * on, else the ABB will reset the system - */ -static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di) -{ - /* Check if charger exists and kick watchdog if charging */ - if (di->ac_chg && di->ac_chg->ops.kick_wd && - di->chg_info.online_chg & AC_CHG) { - /* - * If AB charger watchdog expired, pm2xxx charging - * gets disabled. To be safe, kick both AB charger watchdog - * and pm2xxx watchdog. - */ - if (di->ac_chg->external && - di->usb_chg && di->usb_chg->ops.kick_wd) - di->usb_chg->ops.kick_wd(di->usb_chg); - - return di->ac_chg->ops.kick_wd(di->ac_chg); - } - else if (di->usb_chg && di->usb_chg->ops.kick_wd && - di->chg_info.online_chg & USB_CHG) - return di->usb_chg->ops.kick_wd(di->usb_chg); - - return -ENXIO; -} - -/** - * abx500_chargalg_ac_en() - Turn on/off the AC charger - * @di: pointer to the abx500_chargalg structure - * @enable: charger on/off - * @vset: requested charger output voltage - * @iset: requested charger output current - * - * The AC charger will be turned on/off with the requested charge voltage and - * current - */ -static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable, - int vset, int iset) -{ - static int abx500_chargalg_ex_ac_enable_toggle; - - if (!di->ac_chg || !di->ac_chg->ops.enable) - return -ENXIO; - - /* Select maximum of what both the charger and the battery supports */ - if (di->ac_chg->max_out_volt) - vset = min(vset, di->ac_chg->max_out_volt); - if (di->ac_chg->max_out_curr) - iset = min(iset, di->ac_chg->max_out_curr); - - di->chg_info.ac_iset = iset; - di->chg_info.ac_vset = vset; - - /* Enable external charger */ - if (enable && di->ac_chg->external && - !abx500_chargalg_ex_ac_enable_toggle) { - blocking_notifier_call_chain(&charger_notifier_list, - 0, di->dev); - abx500_chargalg_ex_ac_enable_toggle++; - } - - return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset); -} - -/** - * abx500_chargalg_usb_en() - Turn on/off the USB charger - * @di: pointer to the abx500_chargalg structure - * @enable: charger on/off - * @vset: requested charger output voltage - * @iset: requested charger output current - * - * The USB charger will be turned on/off with the requested charge voltage and - * current - */ -static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable, - int vset, int iset) -{ - if (!di->usb_chg || !di->usb_chg->ops.enable) - return -ENXIO; - - /* Select maximum of what both the charger and the battery supports */ - if (di->usb_chg->max_out_volt) - vset = min(vset, di->usb_chg->max_out_volt); - if (di->usb_chg->max_out_curr) - iset = min(iset, di->usb_chg->max_out_curr); - - di->chg_info.usb_iset = iset; - di->chg_info.usb_vset = vset; - - return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset); -} - - /** - * ab8540_chargalg_usb_pp_en() - Enable/ disable USB power path - * @di: pointer to the abx500_chargalg structure - * @enable: power path enable/disable - * - * The USB power path will be enable/ disable - */ -static int ab8540_chargalg_usb_pp_en(struct abx500_chargalg *di, bool enable) -{ - if (!di->usb_chg || !di->usb_chg->ops.pp_enable) - return -ENXIO; - - return di->usb_chg->ops.pp_enable(di->usb_chg, enable); -} - -/** - * ab8540_chargalg_usb_pre_chg_en() - Enable/ disable USB pre-charge - * @di: pointer to the abx500_chargalg structure - * @enable: USB pre-charge enable/disable - * - * The USB USB pre-charge will be enable/ disable - */ -static int ab8540_chargalg_usb_pre_chg_en(struct abx500_chargalg *di, - bool enable) -{ - if (!di->usb_chg || !di->usb_chg->ops.pre_chg_enable) - return -ENXIO; - - return di->usb_chg->ops.pre_chg_enable(di->usb_chg, enable); -} - -/** - * abx500_chargalg_update_chg_curr() - Update charger current - * @di: pointer to the abx500_chargalg structure - * @iset: requested charger output current - * - * The charger output current will be updated for the charger - * that is currently in use - */ -static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di, - int iset) -{ - /* Check if charger exists and update current if charging */ - if (di->ac_chg && di->ac_chg->ops.update_curr && - di->chg_info.charger_type & AC_CHG) { - /* - * Select maximum of what both the charger - * and the battery supports - */ - if (di->ac_chg->max_out_curr) - iset = min(iset, di->ac_chg->max_out_curr); - - di->chg_info.ac_iset = iset; - - return di->ac_chg->ops.update_curr(di->ac_chg, iset); - } else if (di->usb_chg && di->usb_chg->ops.update_curr && - di->chg_info.charger_type & USB_CHG) { - /* - * Select maximum of what both the charger - * and the battery supports - */ - if (di->usb_chg->max_out_curr) - iset = min(iset, di->usb_chg->max_out_curr); - - di->chg_info.usb_iset = iset; - - return di->usb_chg->ops.update_curr(di->usb_chg, iset); - } - - return -ENXIO; -} - -/** - * abx500_chargalg_stop_charging() - Stop charging - * @di: pointer to the abx500_chargalg structure - * - * This function is called from any state where charging should be stopped. - * All charging is disabled and all status parameters and timers are changed - * accordingly - */ -static void abx500_chargalg_stop_charging(struct abx500_chargalg *di) -{ - abx500_chargalg_ac_en(di, false, 0, 0); - abx500_chargalg_usb_en(di, false, 0, 0); - abx500_chargalg_stop_safety_timer(di); - abx500_chargalg_stop_maintenance_timer(di); - di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; - di->maintenance_chg = false; - cancel_delayed_work(&di->chargalg_wd_work); - power_supply_changed(di->chargalg_psy); -} - -/** - * abx500_chargalg_hold_charging() - Pauses charging - * @di: pointer to the abx500_chargalg structure - * - * This function is called in the case where maintenance charging has been - * disabled and instead a battery voltage mode is entered to check when the - * battery voltage has reached a certain recharge voltage - */ -static void abx500_chargalg_hold_charging(struct abx500_chargalg *di) -{ - abx500_chargalg_ac_en(di, false, 0, 0); - abx500_chargalg_usb_en(di, false, 0, 0); - abx500_chargalg_stop_safety_timer(di); - abx500_chargalg_stop_maintenance_timer(di); - di->charge_status = POWER_SUPPLY_STATUS_CHARGING; - di->maintenance_chg = false; - cancel_delayed_work(&di->chargalg_wd_work); - power_supply_changed(di->chargalg_psy); -} - -/** - * abx500_chargalg_start_charging() - Start the charger - * @di: pointer to the abx500_chargalg structure - * @vset: requested charger output voltage - * @iset: requested charger output current - * - * A charger will be enabled depending on the requested charger type that was - * detected previously. - */ -static void abx500_chargalg_start_charging(struct abx500_chargalg *di, - int vset, int iset) -{ - switch (di->chg_info.charger_type) { - case AC_CHG: - dev_dbg(di->dev, - "AC parameters: Vset %d, Ich %d\n", vset, iset); - abx500_chargalg_usb_en(di, false, 0, 0); - abx500_chargalg_ac_en(di, true, vset, iset); - break; - - case USB_CHG: - dev_dbg(di->dev, - "USB parameters: Vset %d, Ich %d\n", vset, iset); - abx500_chargalg_ac_en(di, false, 0, 0); - abx500_chargalg_usb_en(di, true, vset, iset); - break; - - default: - dev_err(di->dev, "Unknown charger to charge from\n"); - break; - } -} - -/** - * abx500_chargalg_check_temp() - Check battery temperature ranges - * @di: pointer to the abx500_chargalg structure - * - * The battery temperature is checked against the predefined limits and the - * charge state is changed accordingly - */ -static void abx500_chargalg_check_temp(struct abx500_chargalg *di) -{ - if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) && - di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) { - /* Temp OK! */ - di->events.btemp_underover = false; - di->events.btemp_lowhigh = false; - di->t_hyst_norm = 0; - di->t_hyst_lowhigh = 0; - } else { - if (((di->batt_data.temp >= di->bm->temp_high) && - (di->batt_data.temp < - (di->bm->temp_over - di->t_hyst_lowhigh))) || - ((di->batt_data.temp > - (di->bm->temp_under + di->t_hyst_lowhigh)) && - (di->batt_data.temp <= di->bm->temp_low))) { - /* TEMP minor!!!!! */ - di->events.btemp_underover = false; - di->events.btemp_lowhigh = true; - di->t_hyst_norm = di->bm->temp_hysteresis; - di->t_hyst_lowhigh = 0; - } else if (di->batt_data.temp <= di->bm->temp_under || - di->batt_data.temp >= di->bm->temp_over) { - /* TEMP major!!!!! */ - di->events.btemp_underover = true; - di->events.btemp_lowhigh = false; - di->t_hyst_norm = 0; - di->t_hyst_lowhigh = di->bm->temp_hysteresis; - } else { - /* Within hysteresis */ - dev_dbg(di->dev, "Within hysteresis limit temp: %d " - "hyst_lowhigh %d, hyst normal %d\n", - di->batt_data.temp, di->t_hyst_lowhigh, - di->t_hyst_norm); - } - } -} - -/** - * abx500_chargalg_check_charger_voltage() - Check charger voltage - * @di: pointer to the abx500_chargalg structure - * - * Charger voltage is checked against maximum limit - */ -static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di) -{ - if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max) - di->chg_info.usb_chg_ok = false; - else - di->chg_info.usb_chg_ok = true; - - if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max) - di->chg_info.ac_chg_ok = false; - else - di->chg_info.ac_chg_ok = true; - -} - -/** - * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled - * @di: pointer to the abx500_chargalg structure - * - * End-of-charge criteria is fulfilled when the battery voltage is above a - * certain limit and the battery current is below a certain limit for a - * predefined number of consecutive seconds. If true, the battery is full - */ -static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di) -{ - if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING && - di->charge_state == STATE_NORMAL && - !di->maintenance_chg && (di->batt_data.volt >= - di->bm->bat_type[di->bm->batt_id].termination_vol || - di->events.usb_cv_active || di->events.ac_cv_active) && - di->batt_data.avg_curr < - di->bm->bat_type[di->bm->batt_id].termination_curr && - di->batt_data.avg_curr > 0) { - if (++di->eoc_cnt >= EOC_COND_CNT) { - di->eoc_cnt = 0; - if ((di->chg_info.charger_type & USB_CHG) && - (di->usb_chg->power_path)) - ab8540_chargalg_usb_pp_en(di, true); - di->charge_status = POWER_SUPPLY_STATUS_FULL; - di->maintenance_chg = true; - dev_dbg(di->dev, "EOC reached!\n"); - power_supply_changed(di->chargalg_psy); - } else { - dev_dbg(di->dev, - " EOC limit reached for the %d" - " time, out of %d before EOC\n", - di->eoc_cnt, - EOC_COND_CNT); - } - } else { - di->eoc_cnt = 0; - } -} - -static void init_maxim_chg_curr(struct abx500_chargalg *di) -{ - di->ccm.original_iset = - di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; - di->ccm.current_iset = - di->bm->bat_type[di->bm->batt_id].normal_cur_lvl; - di->ccm.test_delta_i = di->bm->maxi->charger_curr_step; - di->ccm.max_current = di->bm->maxi->chg_curr; - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.level = 0; -} - -/** - * abx500_chargalg_chg_curr_maxim - increases the charger current to - * compensate for the system load - * @di pointer to the abx500_chargalg structure - * - * This maximization function is used to raise the charger current to get the - * battery current as close to the optimal value as possible. The battery - * current during charging is affected by the system load - */ -static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di) -{ - int delta_i; - - if (!di->bm->maxi->ena_maxi) - return MAXIM_RET_NOACTION; - - delta_i = di->ccm.original_iset - di->batt_data.inst_curr; - - if (di->events.vbus_collapsed) { - dev_dbg(di->dev, "Charger voltage has collapsed %d\n", - di->ccm.wait_cnt); - if (di->ccm.wait_cnt == 0) { - dev_dbg(di->dev, "lowering current\n"); - di->ccm.wait_cnt++; - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.max_current = - di->ccm.current_iset - di->ccm.test_delta_i; - di->ccm.current_iset = di->ccm.max_current; - di->ccm.level--; - return MAXIM_RET_CHANGE; - } else { - dev_dbg(di->dev, "waiting\n"); - /* Let's go in here twice before lowering curr again */ - di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; - return MAXIM_RET_NOACTION; - } - } - - di->ccm.wait_cnt = 0; - - if ((di->batt_data.inst_curr > di->ccm.original_iset)) { - dev_dbg(di->dev, " Maximization Ibat (%dmA) too high" - " (limit %dmA) (current iset: %dmA)!\n", - di->batt_data.inst_curr, di->ccm.original_iset, - di->ccm.current_iset); - - if (di->ccm.current_iset == di->ccm.original_iset) - return MAXIM_RET_NOACTION; - - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.current_iset = di->ccm.original_iset; - di->ccm.level = 0; - - return MAXIM_RET_IBAT_TOO_HIGH; - } - - if (delta_i > di->ccm.test_delta_i && - (di->ccm.current_iset + di->ccm.test_delta_i) < - di->ccm.max_current) { - if (di->ccm.condition_cnt-- == 0) { - /* Increse the iset with cco.test_delta_i */ - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.current_iset += di->ccm.test_delta_i; - di->ccm.level++; - dev_dbg(di->dev, " Maximization needed, increase" - " with %d mA to %dmA (Optimal ibat: %d)" - " Level %d\n", - di->ccm.test_delta_i, - di->ccm.current_iset, - di->ccm.original_iset, - di->ccm.level); - return MAXIM_RET_CHANGE; - } else { - return MAXIM_RET_NOACTION; - } - } else { - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - return MAXIM_RET_NOACTION; - } -} - -static void handle_maxim_chg_curr(struct abx500_chargalg *di) -{ - enum maxim_ret ret; - int result; - - ret = abx500_chargalg_chg_curr_maxim(di); - switch (ret) { - case MAXIM_RET_CHANGE: - result = abx500_chargalg_update_chg_curr(di, - di->ccm.current_iset); - if (result) - dev_err(di->dev, "failed to set chg curr\n"); - break; - case MAXIM_RET_IBAT_TOO_HIGH: - result = abx500_chargalg_update_chg_curr(di, - di->bm->bat_type[di->bm->batt_id].normal_cur_lvl); - if (result) - dev_err(di->dev, "failed to set chg curr\n"); - break; - - case MAXIM_RET_NOACTION: - default: - /* Do nothing..*/ - break; - } -} - -static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) -{ - struct power_supply *psy; - struct power_supply *ext = dev_get_drvdata(dev); - const char **supplicants = (const char **)ext->supplied_to; - struct abx500_chargalg *di; - union power_supply_propval ret; - int j; - bool capacity_updated = false; - - psy = (struct power_supply *)data; - di = power_supply_get_drvdata(psy); - /* For all psy where the driver name appears in any supplied_to */ - j = match_string(supplicants, ext->num_supplicants, psy->desc->name); - if (j < 0) - return 0; - - /* - * If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its - * property because of handling that sysfs entry on its own, this is - * the place to get the battery capacity. - */ - if (!power_supply_get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) { - di->batt_data.percent = ret.intval; - capacity_updated = true; - } - - /* Go through all properties for the psy */ - for (j = 0; j < ext->desc->num_properties; j++) { - enum power_supply_property prop; - prop = ext->desc->properties[j]; - - /* - * Initialize chargers if not already done. - * The ab8500_charger*/ - if (!di->ac_chg && - ext->desc->type == POWER_SUPPLY_TYPE_MAINS) - di->ac_chg = psy_to_ux500_charger(ext); - else if (!di->usb_chg && - ext->desc->type == POWER_SUPPLY_TYPE_USB) - di->usb_chg = psy_to_ux500_charger(ext); - - if (power_supply_get_property(ext, prop, &ret)) - continue; - switch (prop) { - case POWER_SUPPLY_PROP_PRESENT: - switch (ext->desc->type) { - case POWER_SUPPLY_TYPE_BATTERY: - /* Battery present */ - if (ret.intval) - di->events.batt_rem = false; - /* Battery removed */ - else - di->events.batt_rem = true; - break; - case POWER_SUPPLY_TYPE_MAINS: - /* AC disconnected */ - if (!ret.intval && - (di->chg_info.conn_chg & AC_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg &= ~AC_CHG; - } - /* AC connected */ - else if (ret.intval && - !(di->chg_info.conn_chg & AC_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg |= AC_CHG; - } - break; - case POWER_SUPPLY_TYPE_USB: - /* USB disconnected */ - if (!ret.intval && - (di->chg_info.conn_chg & USB_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg &= ~USB_CHG; - } - /* USB connected */ - else if (ret.intval && - !(di->chg_info.conn_chg & USB_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg |= USB_CHG; - } - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_ONLINE: - switch (ext->desc->type) { - case POWER_SUPPLY_TYPE_BATTERY: - break; - case POWER_SUPPLY_TYPE_MAINS: - /* AC offline */ - if (!ret.intval && - (di->chg_info.online_chg & AC_CHG)) { |