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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/power/abx500_chargalg.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/power/abx500_chargalg.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/power/abx500_chargalg.c | 1921 |
1 files changed, 0 insertions, 1921 deletions
diff --git a/ANDROID_3.4.5/drivers/power/abx500_chargalg.c b/ANDROID_3.4.5/drivers/power/abx500_chargalg.c deleted file mode 100644 index 804b88c7..00000000 --- a/ANDROID_3.4.5/drivers/power/abx500_chargalg.c +++ /dev/null @@ -1,1921 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2012 - * - * 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> - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/device.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/mfd/abx500.h> -#include <linux/mfd/abx500/ux500_chargalg.h> -#include <linux/mfd/abx500/ab8500-bm.h> - -/* Watchdog kick interval */ -#define CHG_WD_INTERVAL (6 * HZ) - -/* End-of-charge criteria counter */ -#define EOC_COND_CNT 10 - -/* Recharge criteria counter */ -#define RCH_COND_CNT 3 - -#define to_abx500_chargalg_device_info(x) container_of((x), \ - struct abx500_chargalg, chargalg_psy); - -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_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_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", - "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 - * @rch_cnt: counter used to determine start of recharge - * @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 - * @pdata: pointer to the abx500_chargalg platform data - * @bat: pointer to the abx500_bm platform data - * @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; - int rch_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 abx500_chargalg_platform_data *pdata; - struct abx500_bm_data *bat; - 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 timer_list safety_timer; - struct timer_list maintenance_timer; - struct kobject chargalg_kobject; -}; - -/* Main battery properties */ -static enum power_supply_property abx500_chargalg_props[] = { - POWER_SUPPLY_PROP_STATUS, - POWER_SUPPLY_PROP_HEALTH, -}; - -/** - * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer - * @data: pointer to the abx500_chargalg structure - * - * This function gets called when the safety timer for the charger - * expires - */ -static void abx500_chargalg_safety_timer_expired(unsigned long data) -{ - struct abx500_chargalg *di = (struct abx500_chargalg *) data; - 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); -} - -/** - * abx500_chargalg_maintenance_timer_expired() - Expiration of - * the maintenance timer - * @i: pointer to the abx500_chargalg structure - * - * This function gets called when the maintenence timer - * expires - */ -static void abx500_chargalg_maintenance_timer_expired(unsigned long data) -{ - - struct abx500_chargalg *di = (struct abx500_chargalg *) data; - 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); -} - -/** - * 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; -} - -/** - * 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_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) -{ - unsigned long timer_expiration = 0; - - switch (di->chg_info.charger_type) { - case AC_CHG: - timer_expiration = - round_jiffies(jiffies + - (di->bat->main_safety_tmr_h * 3600 * HZ)); - break; - - case USB_CHG: - timer_expiration = - round_jiffies(jiffies + - (di->bat->usb_safety_tmr_h * 3600 * HZ)); - break; - - default: - dev_err(di->dev, "Unknown charger to charge from\n"); - break; - } - - di->events.safety_timer_expired = false; - di->safety_timer.expires = timer_expiration; - if (!timer_pending(&di->safety_timer)) - add_timer(&di->safety_timer); - else - mod_timer(&di->safety_timer, timer_expiration); -} - -/** - * 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) -{ - di->events.safety_timer_expired = false; - del_timer(&di->safety_timer); -} - -/** - * 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) -{ - unsigned long timer_expiration; - - /* Convert from hours to jiffies */ - timer_expiration = round_jiffies(jiffies + (duration * 3600 * HZ)); - - di->events.maintenance_timer_expired = false; - di->maintenance_timer.expires = timer_expiration; - if (!timer_pending(&di->maintenance_timer)) - add_timer(&di->maintenance_timer); - else - mod_timer(&di->maintenance_timer, timer_expiration); -} - -/** - * 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) -{ - di->events.maintenance_timer_expired = false; - del_timer(&di->maintenance_timer); -} - -/** - * 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) - 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) -{ - 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; - - 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); -} - -/** - * 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->bat->temp_low + di->t_hyst_norm) && - di->batt_data.temp < (di->bat->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->bat->temp_high) && - (di->batt_data.temp < - (di->bat->temp_over - di->t_hyst_lowhigh))) || - ((di->batt_data.temp > - (di->bat->temp_under + di->t_hyst_lowhigh)) && - (di->batt_data.temp <= di->bat->temp_low))) { - /* TEMP minor!!!!! */ - di->events.btemp_underover = false; - di->events.btemp_lowhigh = true; - di->t_hyst_norm = di->bat->temp_hysteresis; - di->t_hyst_lowhigh = 0; - } else if (di->batt_data.temp <= di->bat->temp_under || - di->batt_data.temp >= di->bat->temp_over) { - /* TEMP major!!!!! */ - di->events.btemp_underover = true; - di->events.btemp_lowhigh = false; - di->t_hyst_norm = 0; - di->t_hyst_lowhigh = di->bat->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->bat->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->bat->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->bat->bat_type[di->bat->batt_id].termination_vol || - di->events.usb_cv_active || di->events.ac_cv_active) && - di->batt_data.avg_curr < - di->bat->bat_type[di->bat->batt_id].termination_curr && - di->batt_data.avg_curr > 0) { - if (++di->eoc_cnt >= EOC_COND_CNT) { - di->eoc_cnt = 0; - 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->bat->bat_type[di->bat->batt_id].normal_cur_lvl; - di->ccm.current_iset = - di->bat->bat_type[di->bat->batt_id].normal_cur_lvl; - di->ccm.test_delta_i = di->bat->maxi->charger_curr_step; - di->ccm.max_current = di->bat->maxi->chg_curr; - di->ccm.condition_cnt = di->bat->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->bat->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->bat->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->bat->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->bat->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->bat->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->bat->bat_type[di->bat->batt_id].normal_cur_lvl); - if (result) - dev_err(di->dev, "failed to set chg curr\n"); - break; - - case MAXIM_RET_NOACTION: - default: - /* Do nothing..*/ - break; - } -} - -static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) -{ - struct power_supply *psy; - struct power_supply *ext; - struct abx500_chargalg *di; - union power_supply_propval ret; - int i, j; - bool psy_found = false; - - psy = (struct power_supply *)data; - ext = dev_get_drvdata(dev); - di = to_abx500_chargalg_device_info(psy); - /* For all psy where the driver name appears in any supplied_to */ - for (i = 0; i < ext->num_supplicants; i++) { - if (!strcmp(ext->supplied_to[i], psy->name)) - psy_found = true; - } - if (!psy_found) - return 0; - - /* Go through all properties for the psy */ - for (j = 0; j < ext->num_properties; j++) { - enum power_supply_property prop; - prop = ext->properties[j]; - - /* Initialize chargers if not already done */ - if (!di->ac_chg && - ext->type == POWER_SUPPLY_TYPE_MAINS) - di->ac_chg = psy_to_ux500_charger(ext); - else if (!di->usb_chg && - ext->type == POWER_SUPPLY_TYPE_USB) - di->usb_chg = psy_to_ux500_charger(ext); - - if (ext->get_property(ext, prop, &ret)) - continue; - switch (prop) { - case POWER_SUPPLY_PROP_PRESENT: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - /* Battery present */ - if (ret.intval) - di->events.batt_rem = false; - /* Battery removed */ - else - di->events.batt_rem = true; - break; - case POWER_SUPPLY_TYPE_MAINS: - /* AC disconnected */ - if (!ret.intval && - (di->chg_info.conn_chg & AC_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg &= ~AC_CHG; - } - /* AC connected */ - else if (ret.intval && - !(di->chg_info.conn_chg & AC_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg |= AC_CHG; - } - break; - case POWER_SUPPLY_TYPE_USB: - /* USB disconnected */ - if (!ret.intval && - (di->chg_info.conn_chg & USB_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg &= ~USB_CHG; - } - /* USB connected */ - else if (ret.intval && - !(di->chg_info.conn_chg & USB_CHG)) { - di->chg_info.prev_conn_chg = - di->chg_info.conn_chg; - di->chg_info.conn_chg |= USB_CHG; - } - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_ONLINE: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - break; - case POWER_SUPPLY_TYPE_MAINS: - /* AC offline */ - if (!ret.intval && - (di->chg_info.online_chg & AC_CHG)) { - di->chg_info.prev_online_chg = - di->chg_info.online_chg; - di->chg_info.online_chg &= ~AC_CHG; - } - /* AC online */ - else if (ret.intval && - !(di->chg_info.online_chg & AC_CHG)) { - di->chg_info.prev_online_chg = - di->chg_info.online_chg; - di->chg_info.online_chg |= AC_CHG; - queue_delayed_work(di->chargalg_wq, - &di->chargalg_wd_work, 0); - } - break; - case POWER_SUPPLY_TYPE_USB: - /* USB offline */ - if (!ret.intval && - (di->chg_info.online_chg & USB_CHG)) { - di->chg_info.prev_online_chg = - di->chg_info.online_chg; - di->chg_info.online_chg &= ~USB_CHG; - } - /* USB online */ - else if (ret.intval && - !(di->chg_info.online_chg & USB_CHG)) { - di->chg_info.prev_online_chg = - di->chg_info.online_chg; - di->chg_info.online_chg |= USB_CHG; - queue_delayed_work(di->chargalg_wq, - &di->chargalg_wd_work, 0); - } - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_HEALTH: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - break; - case POWER_SUPPLY_TYPE_MAINS: - switch (ret.intval) { - case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: - di->events.mainextchnotok = true; - di->events.main_thermal_prot = false; - di->events.main_ovv = false; - di->events.ac_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_DEAD: - di->events.ac_wd_expired = true; - di->events.mainextchnotok = false; - di->events.main_ovv = false; - di->events.main_thermal_prot = false; - break; - case POWER_SUPPLY_HEALTH_COLD: - case POWER_SUPPLY_HEALTH_OVERHEAT: - di->events.main_thermal_prot = true; - di->events.mainextchnotok = false; - di->events.main_ovv = false; - di->events.ac_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_OVERVOLTAGE: - di->events.main_ovv = true; - di->events.mainextchnotok = false; - di->events.main_thermal_prot = false; - di->events.ac_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_GOOD: - di->events.main_thermal_prot = false; - di->events.mainextchnotok = false; - di->events.main_ovv = false; - di->events.ac_wd_expired = false; - break; - default: - break; - } - break; - - case POWER_SUPPLY_TYPE_USB: - switch (ret.intval) { - case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE: - di->events.usbchargernotok = true; - di->events.usb_thermal_prot = false; - di->events.vbus_ovv = false; - di->events.usb_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_DEAD: - di->events.usb_wd_expired = true; - di->events.usbchargernotok = false; - di->events.usb_thermal_prot = false; - di->events.vbus_ovv = false; - break; - case POWER_SUPPLY_HEALTH_COLD: - case POWER_SUPPLY_HEALTH_OVERHEAT: - di->events.usb_thermal_prot = true; - di->events.usbchargernotok = false; - di->events.vbus_ovv = false; - di->events.usb_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_OVERVOLTAGE: - di->events.vbus_ovv = true; - di->events.usbchargernotok = false; - di->events.usb_thermal_prot = false; - di->events.usb_wd_expired = false; - break; - case POWER_SUPPLY_HEALTH_GOOD: - di->events.usbchargernotok = false; - di->events.usb_thermal_prot = false; - di->events.vbus_ovv = false; - di->events.usb_wd_expired = false; - break; - default: - break; - } - default: - break; - } - break; - - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - di->batt_data.volt = ret.intval / 1000; - break; - case POWER_SUPPLY_TYPE_MAINS: - di->chg_info.ac_volt = ret.intval / 1000; - break; - case POWER_SUPPLY_TYPE_USB: - di->chg_info.usb_volt = ret.intval / 1000; - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_VOLTAGE_AVG: - switch (ext->type) { - case POWER_SUPPLY_TYPE_MAINS: - /* AVG is used to indicate when we are - * in CV mode */ - if (ret.intval) - di->events.ac_cv_active = true; - else - di->events.ac_cv_active = false; - - break; - case POWER_SUPPLY_TYPE_USB: - /* AVG is used to indicate when we are - * in CV mode */ - if (ret.intval) - di->events.usb_cv_active = true; - else - di->events.usb_cv_active = false; - - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_TECHNOLOGY: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - if (ret.intval) - di->events.batt_unknown = false; - else - di->events.batt_unknown = true; - - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_TEMP: - di->batt_data.temp = ret.intval / 10; - break; - - case POWER_SUPPLY_PROP_CURRENT_NOW: - switch (ext->type) { - case POWER_SUPPLY_TYPE_MAINS: - di->chg_info.ac_curr = - ret.intval / 1000; - break; - case POWER_SUPPLY_TYPE_USB: - di->chg_info.usb_curr = - ret.intval / 1000; - break; - case POWER_SUPPLY_TYPE_BATTERY: - di->batt_data.inst_curr = ret.intval / 1000; - break; - default: - break; - } - break; - - case POWER_SUPPLY_PROP_CURRENT_AVG: - switch (ext->type) { - case POWER_SUPPLY_TYPE_BATTERY: - di->batt_data.avg_curr = ret.intval / 1000; - break; - case POWER_SUPPLY_TYPE_USB: - if (ret.intval) - di->events.vbus_collapsed = true; - else - di->events.vbus_collapsed = false; - break; - default: - break; - } - break; - case POWER_SUPPLY_PROP_CAPACITY: - di->batt_data.percent = ret.intval; - break; - default: - break; - } - } - return 0; -} - -/** - * abx500_chargalg_external_power_changed() - callback for power supply changes - * @psy: pointer to the structure power_supply - * - * This function is the entry point of the pointer external_power_changed - * of the structure power_supply. - * This function gets executed when there is a change in any external power - * supply that this driver needs to be notified of. - */ -static void abx500_chargalg_external_power_changed(struct power_supply *psy) -{ - struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy); - - /* - * Trigger execution of the algorithm instantly and read - * all power_supply properties there instead - */ - queue_work(di->chargalg_wq, &di->chargalg_work); -} - -/** - * abx500_chargalg_algorithm() - Main function for the algorithm - * @di: pointer to the abx500_chargalg structure - * - * This is the main control function for the charging algorithm. - * It is called periodically or when something happens that will - * trigger a state change - */ -static void abx500_chargalg_algorithm(struct abx500_chargalg *di) -{ - int charger_status; - - /* Collect data from all power_supply class devices */ - class_for_each_device(power_supply_class, NULL, - &di->chargalg_psy, abx500_chargalg_get_ext_psy_data); - - abx500_chargalg_end_of_charge(di); - abx500_chargalg_check_temp(di); - abx500_chargalg_check_charger_voltage(di); - - charger_status = abx500_chargalg_check_charger_connection(di); - /* - * First check if we have a charger connected. - * Also we don't allow charging of unknown batteries if configured - * this way - */ - if (!charger_status || - (di->events.batt_unknown && !di->bat->chg_unknown_bat)) { - if (di->charge_state != STATE_HANDHELD) { - di->events.safety_timer_expired = false; - abx500_chargalg_state_to(di, STATE_HANDHELD_INIT); - } - } - - /* If suspended, we should not continue checking the flags */ - else if (di->charge_state == STATE_SUSPENDED_INIT || - di->charge_state == STATE_SUSPENDED) { - /* We don't do anything here, just don,t continue */ - } - - /* Safety timer expiration */ - else if (di->events.safety_timer_expired) { - if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED) - abx500_chargalg_state_to(di, - STATE_SAFETY_TIMER_EXPIRED_INIT); - } - /* - * Check if any interrupts has occured - * that will prevent us from charging - */ - - /* Battery removed */ - else if (di->events.batt_rem) { - if (di->charge_state != STATE_BATT_REMOVED) - abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT); - } - /* Main or USB charger not ok. */ - else if (di->events.mainextchnotok || di->events.usbchargernotok) { - /* - * If vbus_collapsed is set, we have to lower the charger - * current, which is done in the normal state below - */ - if (di->charge_state != STATE_CHG_NOT_OK && - !di->events.vbus_collapsed) - abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT); - } - /* VBUS, Main or VBAT OVV. */ - else if (di->events.vbus_ovv || - di->events.main_ovv || - di->events.batt_ovv || - !di->chg_info.usb_chg_ok || - !di->chg_info.ac_chg_ok) { - if (di->charge_state != STATE_OVV_PROTECT) - abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT); - } - /* USB Thermal, stop charging */ - else if (di->events.main_thermal_prot || - di->events.usb_thermal_prot) { - if (di->charge_state != STATE_HW_TEMP_PROTECT) - abx500_chargalg_state_to(di, - STATE_HW_TEMP_PROTECT_INIT); - } - /* Battery temp over/under */ - else if (di->events.btemp_underover) { - if (di->charge_state != STATE_TEMP_UNDEROVER) - abx500_chargalg_state_to(di, - STATE_TEMP_UNDEROVER_INIT); - } - /* Watchdog expired */ - else if (di->events.ac_wd_expired || - di->events.usb_wd_expired) { - if (di->charge_state != STATE_WD_EXPIRED) - abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT); - } - /* Battery temp high/low */ - else if (di->events.btemp_lowhigh) { - if (di->charge_state != STATE_TEMP_LOWHIGH) - abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT); - } - - dev_dbg(di->dev, - "[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d " - "State %s Active_chg %d Chg_status %d AC %d USB %d " - "AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d " - "USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n", - di->batt_data.volt, - di->batt_data.avg_curr, - di->batt_data.inst_curr, - di->batt_data.temp, - di->batt_data.percent, - di->maintenance_chg, - states[di->charge_state], - di->chg_info.charger_type, - di->charge_status, - di->chg_info.conn_chg & AC_CHG, - di->chg_info.conn_chg & USB_CHG, - di->chg_info.online_chg & AC_CHG, - di->chg_info.online_chg & USB_CHG, - di->events.ac_cv_active, - di->events.usb_cv_active, - di->chg_info.ac_curr, - di->chg_info.usb_curr, - di->chg_info.ac_vset, - di->chg_info.ac_iset, - di->chg_info.usb_vset, - di->chg_info.usb_iset); - - switch (di->charge_state) { - case STATE_HANDHELD_INIT: - abx500_chargalg_stop_charging(di); - di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; - abx500_chargalg_state_to(di, STATE_HANDHELD); - /* Intentional fallthrough */ - - case STATE_HANDHELD: - break; - - case STATE_SUSPENDED_INIT: - if (di->susp_status.ac_suspended) - abx500_chargalg_ac_en(di, false, 0, 0); - if (di->susp_status.usb_suspended) - abx500_chargalg_usb_en(di, false, 0, 0); - abx500_chargalg_stop_safety_timer(di); - abx500_chargalg_stop_maintenance_timer(di); - di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; - di->maintenance_chg = false; - abx500_chargalg_state_to(di, STATE_SUSPENDED); - power_supply_changed(&di->chargalg_psy); - /* Intentional fallthrough */ - - case STATE_SUSPENDED: - /* CHARGING is suspended */ - break; - - case STATE_BATT_REMOVED_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_BATT_REMOVED); - /* Intentional fallthrough */ - - case STATE_BATT_REMOVED: - if (!di->events.batt_rem) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_HW_TEMP_PROTECT_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT); - /* Intentional fallthrough */ - - case STATE_HW_TEMP_PROTECT: - if (!di->events.main_thermal_prot && - !di->events.usb_thermal_prot) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_OVV_PROTECT_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_OVV_PROTECT); - /* Intentional fallthrough */ - - case STATE_OVV_PROTECT: - if (!di->events.vbus_ovv && - !di->events.main_ovv && - !di->events.batt_ovv && - di->chg_info.usb_chg_ok && - di->chg_info.ac_chg_ok) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_CHG_NOT_OK_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_CHG_NOT_OK); - /* Intentional fallthrough */ - - case STATE_CHG_NOT_OK: - if (!di->events.mainextchnotok && - !di->events.usbchargernotok) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_SAFETY_TIMER_EXPIRED_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED); - /* Intentional fallthrough */ - - case STATE_SAFETY_TIMER_EXPIRED: - /* We exit this state when charger is removed */ - break; - - case STATE_NORMAL_INIT: - abx500_chargalg_start_charging(di, - di->bat->bat_type[di->bat->batt_id].normal_vol_lvl, - di->bat->bat_type[di->bat->batt_id].normal_cur_lvl); - abx500_chargalg_state_to(di, STATE_NORMAL); - abx500_chargalg_start_safety_timer(di); - abx500_chargalg_stop_maintenance_timer(di); - init_maxim_chg_curr(di); - di->charge_status = POWER_SUPPLY_STATUS_CHARGING; - di->eoc_cnt = 0; - di->maintenance_chg = false; - power_supply_changed(&di->chargalg_psy); - - break; - - case STATE_NORMAL: - handle_maxim_chg_curr(di); - if (di->charge_status == POWER_SUPPLY_STATUS_FULL && - di->maintenance_chg) { - if (di->bat->no_maintenance) - abx500_chargalg_state_to(di, - STATE_WAIT_FOR_RECHARGE_INIT); - else - abx500_chargalg_state_to(di, - STATE_MAINTENANCE_A_INIT); - } - break; - - /* This state will be used when the maintenance state is disabled */ - case STATE_WAIT_FOR_RECHARGE_INIT: - abx500_chargalg_hold_charging(di); - abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE); - di->rch_cnt = RCH_COND_CNT; - /* Intentional fallthrough */ - - case STATE_WAIT_FOR_RECHARGE: - if (di->batt_data.volt <= - di->bat->bat_type[di->bat->batt_id].recharge_vol) { - if (di->rch_cnt-- == 0) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - } else - di->rch_cnt = RCH_COND_CNT; - break; - - case STATE_MAINTENANCE_A_INIT: - abx500_chargalg_stop_safety_timer(di); - abx500_chargalg_start_maintenance_timer(di, - di->bat->bat_type[ - di->bat->batt_id].maint_a_chg_timer_h); - abx500_chargalg_start_charging(di, - di->bat->bat_type[ - di->bat->batt_id].maint_a_vol_lvl, - di->bat->bat_type[ - di->bat->batt_id].maint_a_cur_lvl); - abx500_chargalg_state_to(di, STATE_MAINTENANCE_A); - power_supply_changed(&di->chargalg_psy); - /* Intentional fallthrough*/ - - case STATE_MAINTENANCE_A: - if (di->events.maintenance_timer_expired) { - abx500_chargalg_stop_maintenance_timer(di); - abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT); - } - break; - - case STATE_MAINTENANCE_B_INIT: - abx500_chargalg_start_maintenance_timer(di, - di->bat->bat_type[ - di->bat->batt_id].maint_b_chg_timer_h); - abx500_chargalg_start_charging(di, - di->bat->bat_type[ - di->bat->batt_id].maint_b_vol_lvl, - di->bat->bat_type[ - di->bat->batt_id].maint_b_cur_lvl); - abx500_chargalg_state_to(di, STATE_MAINTENANCE_B); - power_supply_changed(&di->chargalg_psy); - /* Intentional fallthrough*/ - - case STATE_MAINTENANCE_B: - if (di->events.maintenance_timer_expired) { - abx500_chargalg_stop_maintenance_timer(di); - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - } - break; - - case STATE_TEMP_LOWHIGH_INIT: - abx500_chargalg_start_charging(di, - di->bat->bat_type[ - di->bat->batt_id].low_high_vol_lvl, - di->bat->bat_type[ - di->bat->batt_id].low_high_cur_lvl); - abx500_chargalg_stop_maintenance_timer(di); - di->charge_status = POWER_SUPPLY_STATUS_CHARGING; - abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH); - power_supply_changed(&di->chargalg_psy); - /* Intentional fallthrough */ - - case STATE_TEMP_LOWHIGH: - if (!di->events.btemp_lowhigh) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_WD_EXPIRED_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_WD_EXPIRED); - /* Intentional fallthrough */ - - case STATE_WD_EXPIRED: - if (!di->events.ac_wd_expired && - !di->events.usb_wd_expired) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - - case STATE_TEMP_UNDEROVER_INIT: - abx500_chargalg_stop_charging(di); - abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER); - /* Intentional fallthrough */ - - case STATE_TEMP_UNDEROVER: - if (!di->events.btemp_underover) - abx500_chargalg_state_to(di, STATE_NORMAL_INIT); - break; - } - - /* Start charging directly if the new state is a charge state */ - if (di->charge_state == STATE_NORMAL_INIT || - di->charge_state == STATE_MAINTENANCE_A_INIT || - di->charge_state == STATE_MAINTENANCE_B_INIT) - queue_work(di->chargalg_wq, &di->chargalg_work); -} - -/** - * abx500_chargalg_periodic_work() - Periodic work for the algorithm - * @work: pointer to the work_struct structure - * - * Work queue function for the charging algorithm - */ -static void abx500_chargalg_periodic_work(struct work_struct *work) -{ - struct abx500_chargalg *di = container_of(work, - struct abx500_chargalg, chargalg_periodic_work.work); - - abx500_chargalg_algorithm(di); - - /* - * If a charger is connected then the battery has to be monitored - * frequently, else the work can be delayed. - */ - if (di->chg_info.conn_chg) - queue_delayed_work(di->chargalg_wq, - &di->chargalg_periodic_work, - di->bat->interval_charging * HZ); - else - queue_delayed_work(di->chargalg_wq, - &di->chargalg_periodic_work, - di->bat->interval_not_charging * HZ); -} - -/** - * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog - * @work: pointer to the work_struct structure - * - * Work queue function for kicking the charger watchdog - */ -static void abx500_chargalg_wd_work(struct work_struct *work) -{ - int ret; - struct abx500_chargalg *di = container_of(work, - struct abx500_chargalg, chargalg_wd_work.work); - - dev_dbg(di->dev, "abx500_chargalg_wd_work\n"); - - ret = abx500_chargalg_kick_watchdog(di); - if (ret < 0) - dev_err(di->dev, "failed to kick watchdog\n"); - - queue_delayed_work(di->chargalg_wq, - &di->chargalg_wd_work, CHG_WD_INTERVAL); -} - -/** - * abx500_chargalg_work() - Work to run the charging algorithm instantly - * @work: pointer to the work_struct structure - * - * Work queue function for calling the charging algorithm - */ -static void abx500_chargalg_work(struct work_struct *work) -{ - struct abx500_chargalg *di = container_of(work, - struct abx500_chargalg, chargalg_work); - - abx500_chargalg_algorithm(di); -} - -/** - * abx500_chargalg_get_property() - get the chargalg properties - * @psy: pointer to the power_supply structure - * @psp: pointer to the power_supply_property structure - * @val: pointer to the power_supply_propval union - * - * This function gets called when an application tries to get the - * chargalg properties by reading the sysfs files. - * status: charging/discharging/full/unknown - * health: health of the battery - * Returns error code in case of failure else 0 on success - */ -static int abx500_chargalg_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct abx500_chargalg *di; - - di = to_abx500_chargalg_device_info(psy); - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - val->intval = di->charge_status; - break; - case POWER_SUPPLY_PROP_HEALTH: - if (di->events.batt_ovv) { - val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; - } else if (di->events.btemp_underover) { - if (di->batt_data.temp <= di->bat->temp_under) - val->intval = POWER_SUPPLY_HEALTH_COLD; - else - val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; - } else { - val->intval = POWER_SUPPLY_HEALTH_GOOD; - } - break; - default: - return -EINVAL; - } - return 0; -} - -/* Exposure to the sysfs interface */ - -/** - * abx500_chargalg_sysfs_charger() - sysfs store operations - * @kobj: pointer to the struct kobject - * @attr: pointer to the struct attribute - * @buf: buffer that holds the parameter passed from userspace - * @length: length of the parameter passed - * - * Returns length of the buffer(input taken from user space) on success - * else error code on failure - * The operation to be performed on passing the parameters from the user space. - */ -static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj, - struct attribute *attr, const char *buf, size_t length) -{ - struct abx500_chargalg *di = container_of(kobj, - struct abx500_chargalg, chargalg_kobject); - long int param; - int ac_usb; - int ret; - char entry = *attr->name; - - switch (entry) { - case 'c': - ret = strict_strtol(buf, 10, ¶m); - if (ret < 0) - return ret; - - ac_usb = param; - switch (ac_usb) { - case 0: - /* Disable charging */ - di->susp_status.ac_suspended = true; - di->susp_status.usb_suspended = true; - di->susp_status.suspended_change = true; - /* Trigger a state change */ - queue_work(di->chargalg_wq, - &di->chargalg_work); - break; - case 1: - /* Enable AC Charging */ - di->susp_status.ac_suspended = false; - di->susp_status.suspended_change = true; - /* Trigger a state change */ - queue_work(di->chargalg_wq, - &di->chargalg_work); - break; - case 2: - /* Enable USB charging */ - di->susp_status.usb_suspended = false; - di->susp_status.suspended_change = true; - /* Trigger a state change */ - queue_work(di->chargalg_wq, - &di->chargalg_work); - break; - default: - dev_info(di->dev, "Wrong input\n" - "Enter 0. Disable AC/USB Charging\n" - "1. Enable AC charging\n" - "2. Enable USB Charging\n"); - }; - break; - }; - return strlen(buf); -} - -static struct attribute abx500_chargalg_en_charger = \ -{ - .name = "chargalg", - .mode = S_IWUGO, -}; - -static struct attribute *abx500_chargalg_chg[] = { - &abx500_chargalg_en_charger, - NULL -}; - -static const struct sysfs_ops abx500_chargalg_sysfs_ops = { - .store = abx500_chargalg_sysfs_charger, -}; - -static struct kobj_type abx500_chargalg_ktype = { - .sysfs_ops = &abx500_chargalg_sysfs_ops, - .default_attrs = abx500_chargalg_chg, -}; - -/** - * abx500_chargalg_sysfs_exit() - de-init of sysfs entry - * @di: pointer to the struct abx500_chargalg - * - * This function removes the entry in sysfs. - */ -static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di) -{ - kobject_del(&di->chargalg_kobject); -} - -/** - * abx500_chargalg_sysfs_init() - init of sysfs entry - * @di: pointer to the struct abx500_chargalg - * - * This function adds an entry in sysfs. - * Returns error code in case of failure else 0(on success) - */ -static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di) -{ - int ret = 0; - - ret = kobject_init_and_add(&di->chargalg_kobject, - &abx500_chargalg_ktype, - NULL, "abx500_chargalg"); - if (ret < 0) - dev_err(di->dev, "failed to create sysfs entry\n"); - - return ret; -} -/* Exposure to the sysfs interface <<END>> */ - -#if defined(CONFIG_PM) -static int abx500_chargalg_resume(struct platform_device *pdev) -{ - struct abx500_chargalg *di = platform_get_drvdata(pdev); - - /* Kick charger watchdog if charging (any charger online) */ - if (di->chg_info.online_chg) - queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0); - - /* - * Run the charging algorithm directly to be sure we don't - * do it too seldom - */ - queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); - - return 0; -} - -static int abx500_chargalg_suspend(struct platform_device *pdev, - pm_message_t state) -{ - struct abx500_chargalg *di = platform_get_drvdata(pdev); - - if (di->chg_info.online_chg) - cancel_delayed_work_sync(&di->chargalg_wd_work); - - cancel_delayed_work_sync(&di->chargalg_periodic_work); - - return 0; -} -#else -#define abx500_chargalg_suspend NULL -#define abx500_chargalg_resume NULL -#endif - -static int __devexit abx500_chargalg_remove(struct platform_device *pdev) -{ - struct abx500_chargalg *di = platform_get_drvdata(pdev); - - /* sysfs interface to enable/disbale charging from user space */ - abx500_chargalg_sysfs_exit(di); - - /* Delete the work queue */ - destroy_workqueue(di->chargalg_wq); - - flush_scheduled_work(); - power_supply_unregister(&di->chargalg_psy); - platform_set_drvdata(pdev, NULL); - kfree(di); - - return 0; -} - -static int __devinit abx500_chargalg_probe(struct platform_device *pdev) -{ - struct abx500_bm_plat_data *plat_data; - int ret = 0; - - struct abx500_chargalg *di = - kzalloc(sizeof(struct abx500_chargalg), GFP_KERNEL); - if (!di) - return -ENOMEM; - - /* get device struct */ - di->dev = &pdev->dev; - - plat_data = pdev->dev.platform_data; - di->pdata = plat_data->chargalg; - di->bat = plat_data->battery; - - /* chargalg supply */ - di->chargalg_psy.name = "abx500_chargalg"; - di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY; - di->chargalg_psy.properties = abx500_chargalg_props; - di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props); - di->chargalg_psy.get_property = abx500_chargalg_get_property; - di->chargalg_psy.supplied_to = di->pdata->supplied_to; - di->chargalg_psy.num_supplicants = di->pdata->num_supplicants; - di->chargalg_psy.external_power_changed = - abx500_chargalg_external_power_changed; - - /* Initilialize safety timer */ - init_timer(&di->safety_timer); - di->safety_timer.function = abx500_chargalg_safety_timer_expired; - di->safety_timer.data = (unsigned long) di; - - /* Initilialize maintenance timer */ - init_timer(&di->maintenance_timer); - di->maintenance_timer.function = - abx500_chargalg_maintenance_timer_expired; - di->maintenance_timer.data = (unsigned long) di; - - /* Create a work queue for the chargalg */ - di->chargalg_wq = - create_singlethread_workqueue("abx500_chargalg_wq"); - if (di->chargalg_wq == NULL) { - dev_err(di->dev, "failed to create work queue\n"); - goto free_device_info; - } - - /* Init work for chargalg */ - INIT_DELAYED_WORK_DEFERRABLE(&di->chargalg_periodic_work, - abx500_chargalg_periodic_work); - INIT_DELAYED_WORK_DEFERRABLE(&di->chargalg_wd_work, - abx500_chargalg_wd_work); - - /* Init work for chargalg */ - INIT_WORK(&di->chargalg_work, abx500_chargalg_work); - - /* To detect charger at startup */ - di->chg_info.prev_conn_chg = -1; - - /* Register chargalg power supply class */ - ret = power_supply_register(di->dev, &di->chargalg_psy); - if (ret) { - dev_err(di->dev, "failed to register chargalg psy\n"); - goto free_chargalg_wq; - } - - platform_set_drvdata(pdev, di); - - /* sysfs interface to enable/disable charging from user space */ - ret = abx500_chargalg_sysfs_init(di); - if (ret) { - dev_err(di->dev, "failed to create sysfs entry\n"); - goto free_psy; - } - - /* Run the charging algorithm */ - queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0); - - dev_info(di->dev, "probe success\n"); - return ret; - -free_psy: - power_supply_unregister(&di->chargalg_psy); -free_chargalg_wq: - destroy_workqueue(di->chargalg_wq); -free_device_info: - kfree(di); - - return ret; -} - -static struct platform_driver abx500_chargalg_driver = { - .probe = abx500_chargalg_probe, - .remove = __devexit_p(abx500_chargalg_remove), - .suspend = abx500_chargalg_suspend, - .resume = abx500_chargalg_resume, - .driver = { - .name = "abx500-chargalg", - .owner = THIS_MODULE, - }, -}; - -static int __init abx500_chargalg_init(void) -{ - return platform_driver_register(&abx500_chargalg_driver); -} - -static void __exit abx500_chargalg_exit(void) -{ - platform_driver_unregister(&abx500_chargalg_driver); -} - -module_init(abx500_chargalg_init); -module_exit(abx500_chargalg_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); -MODULE_ALIAS("platform:abx500-chargalg"); -MODULE_DESCRIPTION("abx500 battery charging algorithm"); |