/* * Copyright 2012 ST Ericsson. * * Power supply driver for ST Ericsson pm2xxx_charger charger * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pm2301_charger.h" #define to_pm2xxx_charger_ac_device_info(x) container_of((x), \ struct pm2xxx_charger, ac_chg) #define SLEEP_MIN 50 #define SLEEP_MAX 100 #define PM2XXX_AUTOSUSPEND_DELAY 500 static int pm2xxx_interrupt_registers[] = { PM2XXX_REG_INT1, PM2XXX_REG_INT2, PM2XXX_REG_INT3, PM2XXX_REG_INT4, PM2XXX_REG_INT5, PM2XXX_REG_INT6, }; static enum power_supply_property pm2xxx_charger_ac_props[] = { POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_AVG, }; static int pm2xxx_charger_voltage_map[] = { 3500, 3525, 3550, 3575, 3600, 3625, 3650, 3675, 3700, 3725, 3750, 3775, 3800, 3825, 3850, 3875, 3900, 3925, 3950, 3975, 4000, 4025, 4050, 4075, 4100, 4125, 4150, 4175, 4200, 4225, 4250, 4275, 4300, }; static int pm2xxx_charger_current_map[] = { 200, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000, }; static const struct i2c_device_id pm2xxx_ident[] = { { "pm2301", 0 }, { } }; static void set_lpn_pin(struct pm2xxx_charger *pm2) { gpio_set_value(pm2->lpn_pin, 1); usleep_range(SLEEP_MIN, SLEEP_MAX); return; } static void clear_lpn_pin(struct pm2xxx_charger *pm2) { gpio_set_value(pm2->lpn_pin, 0); return; } static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val) { int ret; /* * When AC adaptor is unplugged, the host * must put LPN high to be able to * communicate by I2C with PM2301 * and receive I2C "acknowledge" from PM2301. */ mutex_lock(&pm2->lock); ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg, 1, val); if (ret < 0) dev_err(pm2->dev, "Error reading register at 0x%x\n", reg); else ret = 0; mutex_unlock(&pm2->lock); return ret; } static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val) { int ret; /* * When AC adaptor is unplugged, the host * must put LPN high to be able to * communicate by I2C with PM2301 * and receive I2C "acknowledge" from PM2301. */ mutex_lock(&pm2->lock); ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg, 1, &val); if (ret < 0) dev_err(pm2->dev, "Error writing register at 0x%x\n", reg); else ret = 0; mutex_unlock(&pm2->lock); return ret; } static int pm2xxx_charging_enable_mngt(struct pm2xxx_charger *pm2) { int ret; /* Enable charging */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2, (PM2XXX_CH_AUTO_RESUME_EN | PM2XXX_CHARGER_ENA)); return ret; } static int pm2xxx_charging_disable_mngt(struct pm2xxx_charger *pm2) { int ret; /* Disable SW EOC ctrl */ ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); return ret; } /* Disable charging */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2, (PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS)); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); return ret; } return 0; } static int pm2xxx_charger_batt_therm_mngt(struct pm2xxx_charger *pm2, int val) { queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work); return 0; } int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val) { queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work); return 0; } static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val) { dev_err(pm2->dev, "Overvoltage detected\n"); pm2->flags.ovv = true; power_supply_changed(&pm2->ac_chg.psy); /* Schedule a new HW failure check */ queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0); return 0; } static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val) { dev_dbg(pm2->dev , "20 minutes watchdog occured\n"); pm2->ac.wd_expired = true; power_supply_changed(&pm2->ac_chg.psy); return 0; } static int pm2xxx_charger_vbat_lsig_mngt(struct pm2xxx_charger *pm2, int val) { int ret; switch (val) { case PM2XXX_INT1_ITVBATLOWR: dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n"); /* Enable SW EOC ctrl */ ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_SW); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); return ret; } break; case PM2XXX_INT1_ITVBATLOWF: dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n"); /* Disable SW EOC ctrl */ ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); return ret; } break; default: dev_err(pm2->dev, "Unknown VBAT level\n"); } return 0; } static int pm2xxx_charger_bat_disc_mngt(struct pm2xxx_charger *pm2, int val) { dev_dbg(pm2->dev, "battery disconnected\n"); return 0; } static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val) { int ret; ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT2, val); if (ret < 0) { dev_err(pm2->dev, "Charger detection failed\n"); goto out; } *val &= (PM2XXX_INT2_S_ITVPWR1PLUG | PM2XXX_INT2_S_ITVPWR2PLUG); out: return ret; } static int pm2xxx_charger_itv_pwr_plug_mngt(struct pm2xxx_charger *pm2, int val) { int ret; u8 read_val; /* * Since we can't be sure that the events are received * synchronously, we have the check if the main charger is * connected by reading the interrupt source register. */ ret = pm2xxx_charger_detection(pm2, &read_val); if ((ret == 0) && read_val) { pm2->ac.charger_connected = 1; pm2->ac_conn = true; queue_work(pm2->charger_wq, &pm2->ac_work); } return ret; } static int pm2xxx_charger_itv_pwr_unplug_mngt(struct pm2xxx_charger *pm2, int val) { pm2->ac.charger_connected = 0; queue_work(pm2->charger_wq, &pm2->ac_work); return 0; } static int pm2_int_reg0(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & PM2XXX_INT1_ITVBATLOWR) { ret = pm2xxx_charger_vbat_lsig_mngt(pm2, PM2XXX_INT1_ITVBATLOWR); if (ret < 0) goto out; } if (val & PM2XXX_INT1_ITVBATLOWF) { ret = pm2xxx_charger_vbat_lsig_mngt(pm2, PM2XXX_INT1_ITVBATLOWF); if (ret < 0) goto out; } if (val & PM2XXX_INT1_ITVBATDISCONNECT) { ret = pm2xxx_charger_bat_disc_mngt(pm2, PM2XXX_INT1_ITVBATDISCONNECT); if (ret < 0) goto out; } out: return ret; } static int pm2_int_reg1(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) { dev_dbg(pm2->dev , "Main charger plugged\n"); ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)); } if (val & (PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) { dev_dbg(pm2->dev , "Main charger unplugged\n"); ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, val & (PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)); } return ret; } static int pm2_int_reg2(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & PM2XXX_INT3_ITAUTOTIMEOUTWD) ret = pm2xxx_charger_wd_exp_mngt(pm2, val); if (val & (PM2XXX_INT3_ITCHPRECHARGEWD | PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) { dev_dbg(pm2->dev, "Watchdog occured for precharge, CC and CV charge\n"); } return ret; } static int pm2_int_reg3(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & (PM2XXX_INT4_ITCHARGINGON)) { dev_dbg(pm2->dev , "chargind operation has started\n"); } if (val & (PM2XXX_INT4_ITVRESUME)) { dev_dbg(pm2->dev, "battery discharged down to VResume threshold\n"); } if (val & (PM2XXX_INT4_ITBATTFULL)) { dev_dbg(pm2->dev , "battery fully detected\n"); } if (val & (PM2XXX_INT4_ITCVPHASE)) { dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n"); } if (val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) { pm2->failure_case = VPWR_OVV; ret = pm2xxx_charger_ovv_mngt(pm2, val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)); dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n"); } if (val & (PM2XXX_INT4_S_ITBATTEMPCOLD | PM2XXX_INT4_S_ITBATTEMPHOT)) { ret = pm2xxx_charger_batt_therm_mngt(pm2, val & (PM2XXX_INT4_S_ITBATTEMPCOLD | PM2XXX_INT4_S_ITBATTEMPHOT)); dev_dbg(pm2->dev, "BTEMP is too Low/High\n"); } return ret; } static int pm2_int_reg4(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & PM2XXX_INT5_ITVSYSTEMOVV) { pm2->failure_case = VSYSTEM_OVV; ret = pm2xxx_charger_ovv_mngt(pm2, val & PM2XXX_INT5_ITVSYSTEMOVV); dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n"); } if (val & (PM2XXX_INT5_ITTHERMALWARNINGFALL | PM2XXX_INT5_ITTHERMALWARNINGRISE | PM2XXX_INT5_ITTHERMALSHUTDOWNFALL | PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)) { dev_dbg(pm2->dev, "BTEMP die temperature is too Low/High\n"); ret = pm2xxx_charger_die_therm_mngt(pm2, val & (PM2XXX_INT5_ITTHERMALWARNINGFALL | PM2XXX_INT5_ITTHERMALWARNINGRISE | PM2XXX_INT5_ITTHERMALSHUTDOWNFALL | PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)); } return ret; } static int pm2_int_reg5(void *pm2_data, int val) { struct pm2xxx_charger *pm2 = pm2_data; int ret = 0; if (val & (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) { dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n"); } if (val & (PM2XXX_INT6_ITVPWR2VALIDRISE | PM2XXX_INT6_ITVPWR1VALIDRISE | PM2XXX_INT6_ITVPWR2VALIDFALL | PM2XXX_INT6_ITVPWR1VALIDFALL)) { dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n"); } return ret; } static irqreturn_t pm2xxx_irq_int(int irq, void *data) { struct pm2xxx_charger *pm2 = data; struct pm2xxx_interrupts *interrupt = pm2->pm2_int; int i; /* wake up the device */ pm_runtime_get_sync(pm2->dev); do { for (i = 0; i < PM2XXX_NUM_INT_REG; i++) { pm2xxx_reg_read(pm2, pm2xxx_interrupt_registers[i], &(interrupt->reg[i])); if (interrupt->reg[i] > 0) interrupt->handler[i](pm2, interrupt->reg[i]); } } while (gpio_get_value(pm2->pdata->gpio_irq_number) == 0); pm_runtime_mark_last_busy(pm2->dev); pm_runtime_put_autosuspend(pm2->dev); return IRQ_HANDLED; } static int pm2xxx_charger_get_ac_cv(struct pm2xxx_charger *pm2) { int ret = 0; u8 val; if (pm2->ac.charger_connected && pm2->ac.charger_online) { ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); goto out; } if (val & PM2XXX_INT4_S_ITCVPHASE) ret = PM2XXX_CONST_VOLT; else ret = PM2XXX_CONST_CURR; } out: return ret; } static int pm2xxx_current_to_regval(int curr) { int i; if (curr < pm2xxx_charger_current_map[0]) return 0; for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_current_map); i++) { if (curr < pm2xxx_charger_current_map[i]) return (i - 1); } i = ARRAY_SIZE(pm2xxx_charger_current_map) - 1; if (curr == pm2xxx_charger_current_map[i]) return i; else return -EINVAL; } static int pm2xxx_voltage_to_regval(int curr) { int i; if (curr < pm2xxx_charger_voltage_map[0]) return 0; for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_voltage_map); i++) { if (curr < pm2xxx_charger_voltage_map[i]) return i - 1; } i = ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1; if (curr == pm2xxx_charger_voltage_map[i]) return i; else return -EINVAL; } static int pm2xxx_charger_update_charger_current(struct ux500_charger *charger, int ich_out) { int ret; int curr_index; struct pm2xxx_charger *pm2; u8 val; if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) pm2 = to_pm2xxx_charger_ac_device_info(charger); else return -ENXIO; curr_index = pm2xxx_current_to_regval(ich_out); if (curr_index < 0) { dev_err(pm2->dev, "Charger current too high, charging not started\n"); return -ENXIO; } ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val); if (ret >= 0) { val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK; val |= curr_index; ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val); if (ret < 0) { dev_err(pm2->dev, "%s write failed\n", __func__); } } else dev_err(pm2->dev, "%s read failed\n", __func__); return ret; } static int pm2xxx_charger_ac_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pm2xxx_charger *pm2; pm2 = to_pm2xxx_charger_ac_device_info(psy_to_ux500_charger(psy)); switch (psp) { case POWER_SUPPLY_PROP_HEALTH: if (pm2->flags.mainextchnotok) val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; else if (pm2->ac.wd_expired) val->intval = POWER_SUPPLY_HEALTH_DEAD; else if (pm2->flags.main_thermal_prot) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else if (pm2->flags.ovv) val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; else val->intval = POWER_SUPPLY_HEALTH_GOOD; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = pm2->ac.charger_online; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = pm2->ac.charger_connected; break; case POWER_SUPPLY_PROP_VOLTAGE_AVG: pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2); val->intval = pm2->ac.cv_active; break; default: return -EINVAL; } return 0; } static int pm2xxx_charging_init(struct pm2xxx_charger *pm2) { int ret = 0; /* enable CC and CV watchdog */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG3, (PM2XXX_CH_WD_CV_PHASE_60MIN | PM2XXX_CH_WD_CC_PHASE_60MIN)); if( ret < 0) return ret; /* enable precharge watchdog */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG4, PM2XXX_CH_WD_PRECH_PHASE_60MIN); /* Disable auto timeout */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG5, PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN); /* * EOC current level = 100mA * Precharge current level = 100mA * CC current level = 1000mA */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, (PM2XXX_DIR_CH_CC_CURRENT_1000MA | PM2XXX_CH_PRECH_CURRENT_100MA | PM2XXX_CH_EOC_CURRENT_100MA)); /* * recharge threshold = 3.8V * Precharge to CC threshold = 2.9V */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG7, (PM2XXX_CH_PRECH_VOL_2_9 | PM2XXX_CH_VRESUME_VOL_3_8)); /* float voltage charger level = 4.2V */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, PM2XXX_CH_VOLT_4_2); /* Voltage drop between VBAT and VSYS in HW charging = 300mV */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG9, (PM2XXX_CH_150MV_DROP_300MV | PM2XXX_CHARCHING_INFO_DIS | PM2XXX_CH_CC_REDUCED_CURRENT_IDENT | PM2XXX_CH_CC_MODEDROP_DIS)); /* Input charger level of over voltage = 10V */ ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR2, PM2XXX_VPWR2_OVV_10); ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR1, PM2XXX_VPWR1_OVV_10); /* Input charger drop */ ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR2, (PM2XXX_VPWR2_HW_OPT_DIS | PM2XXX_VPWR2_VALID_DIS | PM2XXX_VPWR2_DROP_DIS)); ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR1, (PM2XXX_VPWR1_HW_OPT_DIS | PM2XXX_VPWR1_VALID_DIS | PM2XXX_VPWR1_DROP_DIS)); /* Disable battery low monitoring */ ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_LOW_LEV_COMP_REG, PM2XXX_VBAT_LOW_MONITORING_ENA); /* Disable LED */ ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, PM2XXX_LED_SELECT_DIS); return ret; } static int pm2xxx_charger_ac_en(struct ux500_charger *charger, int enable, int vset, int iset) { int ret; int volt_index; int curr_index; u8 val; struct pm2xxx_charger *pm2 = to_pm2xxx_charger_ac_device_info(charger); if (enable) { if (!pm2->ac.charger_connected) { dev_dbg(pm2->dev, "AC charger not connected\n"); return -ENXIO; } dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset); if (!pm2->vddadc_en_ac) { regulator_enable(pm2->regu); pm2->vddadc_en_ac = true; } ret = pm2xxx_charging_init(pm2); if (ret < 0) { dev_err(pm2->dev, "%s charging init failed\n", __func__); goto error_occured; } volt_index = pm2xxx_voltage_to_regval(vset); curr_index = pm2xxx_current_to_regval(iset); if (volt_index < 0 || curr_index < 0) { dev_err(pm2->dev, "Charger voltage or current too high, " "charging not started\n"); return -ENXIO; } ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG8, &val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); goto error_occured; } val &= ~PM2XXX_CH_VOLT_MASK; val |= volt_index; ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); goto error_occured; } ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); goto error_occured; } val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK; val |= curr_index; ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); goto error_occured; } if (!pm2->bat->enable_overshoot) { ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); goto error_occured; } val |= PM2XXX_ANTI_OVERSHOOT_EN; ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); goto error_occured; } } ret = pm2xxx_charging_enable_mngt(pm2); if (ret < 0) { dev_err(pm2->dev, "Failed to enable" "pm2xxx ac charger\n"); goto error_occured; } pm2->ac.charger_online = 1; } else { pm2->ac.charger_online = 0; pm2->ac.wd_expired = false; /* Disable regulator if enabled */ if (pm2->vddadc_en_ac) { regulator_disable(pm2->regu); pm2->vddadc_en_ac = false; } ret = pm2xxx_charging_disable_mngt(pm2); if (ret < 0) { dev_err(pm2->dev, "failed to disable" "pm2xxx ac charger\n"); goto error_occured; } dev_dbg(pm2->dev, "PM2301: " "Disabled AC charging\n"); } power_supply_changed(&pm2->ac_chg.psy); error_occured: return ret; } static int pm2xxx_charger_watchdog_kick(struct ux500_charger *charger) { int ret; struct pm2xxx_charger *pm2; if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) pm2 = to_pm2xxx_charger_ac_device_info(charger); else return -ENXIO; ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_WD_KICK, WD_TIMER); if (ret) dev_err(pm2->dev, "Failed to kick WD!\n"); return ret; } static void pm2xxx_charger_ac_work(struct work_struct *work) { struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger, ac_work); power_supply_changed(&pm2->ac_chg.psy); sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present"); }; static void pm2xxx_charger_check_hw_failure_work(struct work_struct *work) { u8 reg_value; struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger, check_hw_failure_work.work); if (pm2->flags.ovv) { pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, ®_value); if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV | PM2XXX_INT4_S_ITVPWR2OVV))) { pm2->flags.ovv = false; power_supply_changed(&pm2->ac_chg.psy); } } /* If we still have a failure, schedule a new check */ if (pm2->flags.ovv) { queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, round_jiffies(HZ)); } } static void pm2xxx_charger_check_main_thermal_prot_work( struct work_struct *work) { int ret; u8 val; struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger, check_main_thermal_prot_work); /* Check if die temp warning is still active */ ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT5, &val); if (ret < 0) { dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); return; } if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGRISE | PM2XXX_INT5_S_ITTHERMALSHUTDOWNRISE)) pm2->flags.main_thermal_prot = true; else if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGFALL | PM2XXX_INT5_S_ITTHERMALSHUTDOWNFALL)) pm2->flags.main_thermal_prot = false; power_supply_changed(&pm2->ac_chg.psy); } static struct pm2xxx_interrupts pm2xxx_int = { .handler[0] = pm2_int_reg0, .handler[1] = pm2_int_reg1, .handler[2] = pm2_int_reg2, .handler[3] = pm2_int_reg3, .handler[4] = pm2_int_reg4, .handler[5] = pm2_int_reg5, }; static struct pm2xxx_irq pm2xxx_charger_irq[] = { {"PM2XXX_IRQ_INT", pm2xxx_irq_int}, }; static int pm2xxx_wall_charger_resume(struct i2c_client *i2c_client) { struct pm2xxx_charger *pm2; pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client); set_lpn_pin(pm2); /* If we still have a HW failure, schedule a new check */ if (pm2->flags.ovv) queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0); return 0; } static int pm2xxx_wall_charger_suspend(struct i2c_client *i2c_client, pm_message_t state) { struct pm2xxx_charger *pm2; pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client); clear_lpn_pin(pm2); /* Cancel any pending HW failure check */ if (delayed_work_pending(&pm2->check_hw_failure_work)) cancel_delayed_work(&pm2->check_hw_failure_work); flush_work(&pm2->ac_work); flush_work(&pm2->check_main_thermal_prot_work); return 0; } #ifdef CONFIG_PM static int pm2xxx_runtime_suspend(struct device *dev) { struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev); struct pm2xxx_charger *pm2; int ret = 0; pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client); if (!pm2) { dev_err(pm2->dev, "no pm2xxx_charger data supplied\n"); ret = -EINVAL; return ret; } clear_lpn_pin(pm2); return ret; } static int pm2xxx_runtime_resume(struct device *dev) { struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev); struct pm2xxx_charger *pm2; int ret = 0; pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client); if (!pm2) { dev_err(pm2->dev, "no pm2xxx_charger data supplied\n"); ret = -EINVAL; return ret; } if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0) set_lpn_pin(pm2); return ret; } static const struct dev_pm_ops pm2xxx_pm_ops = { .runtime_suspend = pm2xxx_runtime_suspend, .runtime_resume = pm2xxx_runtime_resume, }; #define PM2XXX_PM_OPS (&pm2xxx_pm_ops) #else #define PM2XXX_PM_OPS NULL #endif static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { struct pm2xxx_platform_data *pl_data = i2c_client->dev.platform_data; struct pm2xxx_charger *pm2; int ret = 0; u8 val; int i; pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL); if (!pm2) { dev_err(pm2->dev, "pm2xxx_charger allocation failed\n"); return -ENOMEM; } /* get parent data */ pm2->dev = &i2c_client->dev; pm2->pm2_int = &pm2xxx_int; /* get charger spcific platform data */ if (!pl_data->wall_charger) { dev_err(pm2->dev, "no charger platform data supplied\n"); ret = -EINVAL; goto free_device_info; } pm2->pdata = pl_data->wall_charger; /* get battery specific platform data */ if (!pl_data->battery) { dev_err(pm2->dev, "no battery platform data supplied\n"); ret = -EINVAL; goto free_device_info; } pm2->bat = pl_data->battery; /*get lpn GPIO from platform data*/ if (!pm2->pdata->lpn_gpio) { dev_err(pm2->dev, "no lpn gpio data supplied\n"); ret = -EINVAL; goto free_device_info; } pm2->lpn_pin = pm2->pdata->lpn_gpio; if (!i2c_check_functionality(i2c_client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_READ_WORD_DATA)) { ret = -ENODEV; dev_info(pm2->dev, "pm2301 i2c_check_functionality failed\n"); goto free_device_info; } pm2->config.pm2xxx_i2c = i2c_client; pm2->config.pm2xxx_id = (struct i2c_device_id *) id; i2c_set_clientdata(i2c_client, pm2); /* AC supply */ /* power_supply base class */ pm2->ac_chg.psy.name = pm2->pdata->label; pm2->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS; pm2->ac_chg.psy.properties = pm2xxx_charger_ac_props; pm2->ac_chg.psy.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props); pm2->ac_chg.psy.get_property = pm2xxx_charger_ac_get_property; pm2->ac_chg.psy.supplied_to = pm2->pdata->supplied_to; pm2->ac_chg.psy.num_supplicants = pm2->pdata->num_supplicants; /* pm2xxx_charger sub-class */ pm2->ac_chg.ops.enable = &pm2xxx_charger_ac_en; pm2->ac_chg.ops.kick_wd = &pm2xxx_charger_watchdog_kick; pm2->ac_chg.ops.update_curr = &pm2xxx_charger_update_charger_current; pm2->ac_chg.max_out_volt = pm2xxx_charger_voltage_map[ ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1]; pm2->ac_chg.max_out_curr = pm2xxx_charger_current_map[ ARRAY_SIZE(pm2xxx_charger_current_map) - 1]; pm2->ac_chg.wdt_refresh = WD_KICK_INTERVAL; pm2->ac_chg.enabled = true; pm2->ac_chg.external = true; /* Create a work queue for the charger */ pm2->charger_wq = create_singlethread_workqueue("pm2xxx_charger_wq"); if (pm2->charger_wq == NULL) { dev_err(pm2->dev, "failed to create work queue\n"); goto free_device_info; } /* Init work for charger detection */ INIT_WORK(&pm2->ac_work, pm2xxx_charger_ac_work); /* Init work for checking HW status */ INIT_WORK(&pm2->check_main_thermal_prot_work, pm2xxx_charger_check_main_thermal_prot_work); /* Init work for HW failure check */ INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work, pm2xxx_charger_check_hw_failure_work); /* * VDD ADC supply needs to be enabled from this driver when there * is a charger connected to avoid erroneous BTEMP_HIGH/LOW * interrupts during charging */ pm2->regu = regulator_get(pm2->dev, "vddadc"); if (IS_ERR(pm2->regu)) { ret = PTR_ERR(pm2->regu); dev_err(pm2->dev, "failed to get vddadc regulator\n"); goto free_charger_wq; } /* Register AC charger class */ ret = power_supply_register(pm2->dev, &pm2->ac_chg.psy); if (ret) { dev_err(pm2->dev, "failed to register AC charger\n"); goto free_regulator; } /* Register interrupts */ ret = request_threaded_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), NULL, pm2xxx_charger_irq[0].isr, pm2->pdata->irq_type, pm2xxx_charger_irq[0].name, pm2); if (ret != 0) { dev_err(pm2->dev, "failed to request %s IRQ %d: %d\n", pm2xxx_charger_irq[0].name, gpio_to_irq(pm2->pdata->gpio_irq_number), ret); goto unregister_pm2xxx_charger; } ret = pm_runtime_set_active(pm2->dev); if (ret) dev_err(pm2->dev, "set active Error\n"); pm_runtime_enable(pm2->dev); pm_runtime_set_autosuspend_delay(pm2->dev, PM2XXX_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(pm2->dev); pm_runtime_resume(pm2->dev); /* pm interrupt can wake up system */ ret = enable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number)); if (ret) { dev_err(pm2->dev, "failed to set irq wake\n"); goto unregister_pm2xxx_interrupt; } mutex_init(&pm2->lock); /* * Charger detection mechanism requires pulling up the LPN pin * while i2c communication if Charger is not connected * LPN pin of PM2301 is GPIO60 of AB9540 */ ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio"); if (ret < 0) { dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n"); goto disable_pm2_irq_wake; } ret = gpio_direction_output(pm2->lpn_pin, 0); if (ret < 0) { dev_err(pm2->dev, "pm2301_lpm_gpio direction failed\n"); goto free_gpio; } set_lpn_pin(pm2); /* read interrupt registers */ for (i = 0; i < PM2XXX_NUM_INT_REG; i++) pm2xxx_reg_read(pm2, pm2xxx_interrupt_registers[i], &val); ret = pm2xxx_charger_detection(pm2, &val); if ((ret == 0) && val) { pm2->ac.charger_connected = 1; ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, AB8500_MAIN_CH_DET); pm2->ac_conn = true; power_supply_changed(&pm2->ac_chg.psy); sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present"); } return 0; free_gpio: gpio_free(pm2->lpn_pin); disable_pm2_irq_wake: disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number)); unregister_pm2xxx_interrupt: /* disable interrupt */ free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2); unregister_pm2xxx_charger: /* unregister power supply */ power_supply_unregister(&pm2->ac_chg.psy); free_regulator: /* disable the regulator */ regulator_put(pm2->regu); free_charger_wq: destroy_workqueue(pm2->charger_wq); free_device_info: kfree(pm2); return ret; } static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client) { struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client); /* Disable pm_runtime */ pm_runtime_disable(pm2->dev); /* Disable AC charging */ pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0); /* Disable wake by pm interrupt */ disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number)); /* Disable interrupts */ free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2); /* Delete the work queue */ destroy_workqueue(pm2->charger_wq); flush_scheduled_work(); /* disable the regulator */ regulator_put(pm2->regu); power_supply_unregister(&pm2->ac_chg.psy); gpio_free(pm2->lpn_pin); kfree(pm2); return 0; } static const struct i2c_device_id pm2xxx_id[] = { { "pm2301", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, pm2xxx_id); static struct i2c_driver pm2xxx_charger_driver = { .probe = pm2xxx_wall_charger_probe, .remove = pm2xxx_wall_charger_remove, .suspend = pm2xxx_wall_charger_suspend, .resume = pm2xxx_wall_charger_resume, .driver = { .name = "pm2xxx-wall_charger", .owner = THIS_MODULE, .pm = PM2XXX_PM_OPS, }, .id_table = pm2xxx_id, }; static int __init pm2xxx_charger_init(void) { return i2c_add_driver(&pm2xxx_charger_driver); } static void __exit pm2xxx_charger_exit(void) { i2c_del_driver(&pm2xxx_charger_driver); } subsys_initcall_sync(pm2xxx_charger_init); module_exit(pm2xxx_charger_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay"); MODULE_ALIAS("platform:pm2xxx-charger"); MODULE_DESCRIPTION("PM2xxx charger management driver");