--- /dev/null
+/*
+ * 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/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/mfd/abx500/ab8500-bm.h>
+#include <linux/mfd/abx500/ux500_chargalg.h>
+#include <linux/pm2301_charger.h>
+#include <linux/gpio.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm.h>
+
+#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)
+{
+ if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin)) {
+ gpio_set_value(pm2->lpn_pin, 1);
+ usleep_range(SLEEP_MIN, SLEEP_MAX);
+ }
+}
+
+static void clear_lpn_pin(struct pm2xxx_charger *pm2)
+{
+ if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin))
+ gpio_set_value(pm2->lpn_pin, 0);
+}
+
+static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
+{
+ int ret;
+
+ /* wake up the device */
+ pm_runtime_get_sync(pm2->dev);
+
+ 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;
+
+ pm_runtime_put_sync(pm2->dev);
+
+ return ret;
+}
+
+static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
+{
+ int ret;
+
+ /* wake up the device */
+ pm_runtime_get_sync(pm2->dev);
+
+ 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;
+
+ pm_runtime_put_sync(pm2->dev);
+
+ 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;
+}
+
+
+static 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 expired\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 occurred 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->desc->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);
+
+ 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) {
+ ret = regulator_enable(pm2->regu);
+ if (ret)
+ dev_warn(pm2->dev,
+ "Failed to enable vddadc regulator\n");
+ else
+ 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->desc->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},
+};
+
+#ifdef CONFIG_PM
+
+#ifdef CONFIG_PM_SLEEP
+
+static int pm2xxx_wall_charger_resume(struct device *dev)
+{
+ struct i2c_client *i2c_client = to_i2c_client(dev);
+ 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 device *dev)
+{
+ struct i2c_client *i2c_client = to_i2c_client(dev);
+ 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;
+}
+
+#endif
+
+static int pm2xxx_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
+ struct pm2xxx_charger *pm2;
+
+ pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
+ clear_lpn_pin(pm2);
+
+ return 0;
+}
+
+static int pm2xxx_runtime_resume(struct device *dev)
+{
+ struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
+ struct pm2xxx_charger *pm2;
+
+ pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
+
+ if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0)
+ set_lpn_pin(pm2);
+
+ return 0;
+}
+
+static const struct dev_pm_ops pm2xxx_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm2xxx_wall_charger_suspend,
+ pm2xxx_wall_charger_resume)
+ SET_RUNTIME_PM_OPS(pm2xxx_runtime_suspend, pm2xxx_runtime_resume, NULL)
+};
+#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 power_supply_config psy_cfg = {};
+ struct pm2xxx_charger *pm2;
+ int ret = 0;
+ u8 val;
+ int i;
+
+ if (!pl_data) {
+ dev_err(&i2c_client->dev, "No platform data supplied\n");
+ return -EINVAL;
+ }
+
+ pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL);
+ if (!pm2) {
+ dev_err(&i2c_client->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;
+
+ 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_desc.name = pm2->pdata->label;
+ pm2->ac_chg_desc.type = POWER_SUPPLY_TYPE_MAINS;
+ pm2->ac_chg_desc.properties = pm2xxx_charger_ac_props;
+ pm2->ac_chg_desc.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props);
+ pm2->ac_chg_desc.get_property = pm2xxx_charger_ac_get_property;
+
+ psy_cfg.supplied_to = pm2->pdata->supplied_to;
+ psy_cfg.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) {
+ ret = -ENOMEM;
+ 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 */
+ pm2->ac_chg.psy = power_supply_register(pm2->dev, &pm2->ac_chg_desc,
+ &psy_cfg);
+ if (IS_ERR(pm2->ac_chg.psy)) {
+ dev_err(pm2->dev, "failed to register AC charger\n");
+ ret = PTR_ERR(pm2->ac_chg.psy);
+ 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);
+
+ if (gpio_is_valid(pm2->pdata->lpn_gpio)) {
+ /* get lpn GPIO from platform data */
+ pm2->lpn_pin = pm2->pdata->lpn_gpio;
+
+ /*
+ * 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:
+ if (gpio_is_valid(pm2->lpn_pin))
+ 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);
+
+ if (gpio_is_valid(pm2->lpn_pin))
+ 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,
+ .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);
+}
+
+device_initcall_sync(pm2xxx_charger_init);
+module_exit(pm2xxx_charger_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
+MODULE_ALIAS("i2c:pm2xxx-charger");
+MODULE_DESCRIPTION("PM2xxx charger management driver");
Code Review / kvmfornfv.git / blobdiff