| /* |
| * 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 <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/regulator/consumer.h> |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include <linux/workqueue.h> |
| #include <linux/kobject.h> |
| #include <linux/mfd/abx500.h> |
| #include <linux/mfd/abx500/ab8500.h> |
| #include <linux/mfd/abx500/ab8500-bm.h> |
| #include <linux/mfd/abx500/ab8500-gpadc.h> |
| #include <linux/mfd/abx500/ux500_chargalg.h> |
| #include <linux/pm2301_charger.h> |
| |
| #include "pm2301_charger.h" |
| |
| #define to_pm2xxx_charger_ac_device_info(x) container_of((x), \ |
| struct pm2xxx_charger, ac_chg) |
| |
| 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 int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val) |
| { |
| int ret; |
| |
| 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); |
| |
| return ret; |
| } |
| |
| static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val) |
| { |
| int ret; |
| |
| 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); |
| |
| 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 charging */ |
| ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2, |
| (PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS)); |
| |
| return ret; |
| } |
| |
| 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) |
| { |
| int ret = 0; |
| |
| pm2->failure_input_ovv++; |
| if (pm2->failure_input_ovv < 4) { |
| ret = pm2xxx_charging_enable_mngt(pm2); |
| goto out; |
| } else { |
| pm2->failure_input_ovv = 0; |
| dev_err(pm2->dev, "Overvoltage detected\n"); |
| pm2->flags.ovv = true; |
| power_supply_changed(&pm2->ac_chg.psy); |
| } |
| |
| out: |
| return ret; |
| } |
| |
| 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) |
| { |
| switch (val) { |
| case PM2XXX_INT1_ITVBATLOWR: |
| dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n"); |
| break; |
| |
| case PM2XXX_INT1_ITVBATLOWF: |
| dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n"); |
| 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 = 0; |
| |
| 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 | PM2XXX_INT1_ITVBATLOWF)) { |
| ret = pm2xxx_charger_vbat_lsig_mngt(pm2, val & |
| (PM2XXX_INT1_ITVBATLOWR | PM2XXX_INT1_ITVBATLOWF)); |
| } |
| |
| if (val & PM2XXX_INT1_ITVBATDISCONNECT) { |
| ret = pm2xxx_charger_bat_disc_mngt(pm2, |
| PM2XXX_INT1_ITVBATDISCONNECT); |
| } |
| |
| 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; |
| |
| 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]); |
| } |
| |
| 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 |
| 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_DIS); |
| |
| /* 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) { |
| 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 write failed\n", __func__); |
| goto error_occured; |
| } |
| else |
| dev_err(pm2->dev, "%s read failed\n", __func__); |
| } |
| |
| 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__); |
| goto error_occured; |
| } |
| else |
| dev_err(pm2->dev, "%s read failed\n", __func__); |
| } |
| |
| if (!pm2->bat->enable_overshoot) { |
| ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val); |
| if (ret >= 0) { |
| val |= PM2XXX_ANTI_OVERSHOOT_EN; |
| ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, |
| val); |
| if (ret < 0){ |
| dev_err(pm2->dev, "%s write failed\n", |
| __func__); |
| goto error_occured; |
| } |
| } |
| else |
| dev_err(pm2->dev, "%s read failed\n", __func__); |
| } |
| |
| ret = pm2xxx_charging_enable_mngt(pm2); |
| if (ret) { |
| dev_err(pm2->dev, "%s write failed\n", __func__); |
| 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) { |
| dev_err(pm2->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| 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_main_thermal_prot_work( |
| struct work_struct *work) |
| { |
| }; |
| |
| 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) |
| { |
| return 0; |
| } |
| |
| static int pm2xxx_wall_charger_suspend(struct i2c_client *i2c_client, |
| pm_message_t state) |
| { |
| return 0; |
| } |
| |
| static int __devinit 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; |
| |
| 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->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); |
| |
| 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; |
| |
| 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); |
| |
| /* |
| * 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(pm2->pdata->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, pm2->pdata->irq_number, ret); |
| goto unregister_pm2xxx_charger; |
| } |
| |
| /* |
| * I2C Read/Write will fail, if AC adaptor is not connected. |
| * fix the charger detection mechanism. |
| */ |
| ret = pm2xxx_charger_detection(pm2, &val); |
| |
| if ((ret == 0) && val) { |
| pm2->ac.charger_connected = 1; |
| pm2->ac_conn = true; |
| power_supply_changed(&pm2->ac_chg.psy); |
| sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present"); |
| } |
| |
| return 0; |
| |
| 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 __devexit pm2xxx_wall_charger_remove(struct i2c_client *i2c_client) |
| { |
| struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client); |
| |
| /* Disable AC charging */ |
| pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0); |
| |
| /* Disable interrupts */ |
| free_irq(pm2->pdata->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); |
| |
| 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 = __devexit_p(pm2xxx_wall_charger_remove), |
| .suspend = pm2xxx_wall_charger_suspend, |
| .resume = pm2xxx_wall_charger_resume, |
| .driver = { |
| .name = "pm2xxx-wall_charger", |
| .owner = THIS_MODULE, |
| }, |
| .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"); |
| |