| /* |
| * Copyright (C) ST-Ericsson SA 2012 |
| * |
| * Charger driver for AB8500 |
| * |
| * License Terms: GNU General Public License v2 |
| * Author: |
| * 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/notifier.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/workqueue.h> |
| #include <linux/kobject.h> |
| #include <linux/of.h> |
| #include <linux/mfd/core.h> |
| #include <linux/mfd/abx500/ab8500.h> |
| #include <linux/mfd/abx500.h> |
| #include <linux/mfd/abx500/ab8500-bm.h> |
| #include <linux/mfd/abx500/ab8500-gpadc.h> |
| #include <linux/mfd/abx500/ux500_chargalg.h> |
| #include <linux/usb/otg.h> |
| #include <linux/mutex.h> |
| |
| /* Charger constants */ |
| #define NO_PW_CONN 0 |
| #define AC_PW_CONN 1 |
| #define USB_PW_CONN 2 |
| |
| #define MAIN_WDOG_ENA 0x01 |
| #define MAIN_WDOG_KICK 0x02 |
| #define MAIN_WDOG_DIS 0x00 |
| #define CHARG_WD_KICK 0x01 |
| #define MAIN_CH_ENA 0x01 |
| #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02 |
| #define USB_CH_ENA 0x01 |
| #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02 |
| #define MAIN_CH_DET 0x01 |
| #define MAIN_CH_CV_ON 0x04 |
| #define USB_CH_CV_ON 0x08 |
| #define VBUS_DET_DBNC100 0x02 |
| #define VBUS_DET_DBNC1 0x01 |
| #define OTP_ENABLE_WD 0x01 |
| #define DROP_COUNT_RESET 0x01 |
| #define USB_CH_DET 0x01 |
| |
| #define MAIN_CH_INPUT_CURR_SHIFT 4 |
| #define VBUS_IN_CURR_LIM_SHIFT 4 |
| #define AB8540_VBUS_IN_CURR_LIM_SHIFT 2 |
| #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 |
| #define AB8540_AUTO_VBUS_IN_CURR_MASK 0x3F |
| #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */ |
| |
| #define LED_INDICATOR_PWM_ENA 0x01 |
| #define LED_INDICATOR_PWM_DIS 0x00 |
| #define LED_IND_CUR_5MA 0x04 |
| #define LED_INDICATOR_PWM_DUTY_252_256 0xBF |
| |
| /* HW failure constants */ |
| #define MAIN_CH_TH_PROT 0x02 |
| #define VBUS_CH_NOK 0x08 |
| #define USB_CH_TH_PROT 0x02 |
| #define VBUS_OVV_TH 0x01 |
| #define MAIN_CH_NOK 0x01 |
| #define VBUS_DET 0x80 |
| |
| #define MAIN_CH_STATUS2_MAINCHGDROP 0x80 |
| #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40 |
| #define USB_CH_VBUSDROP 0x40 |
| #define USB_CH_VBUSDETDBNC 0x01 |
| |
| /* UsbLineStatus register bit masks */ |
| #define AB8500_USB_LINK_STATUS 0x78 |
| #define AB8505_USB_LINK_STATUS 0xF8 |
| #define AB8500_STD_HOST_SUSP 0x18 |
| #define USB_LINK_STATUS_SHIFT 3 |
| |
| /* Watchdog timeout constant */ |
| #define WD_TIMER 0x30 /* 4min */ |
| #define WD_KICK_INTERVAL (60 * HZ) |
| |
| /* Lowest charger voltage is 3.39V -> 0x4E */ |
| #define LOW_VOLT_REG 0x4E |
| |
| /* Step up/down delay in us */ |
| #define STEP_UDELAY 1000 |
| |
| #define CHARGER_STATUS_POLL 10 /* in ms */ |
| |
| #define CHG_WD_INTERVAL (60 * HZ) |
| |
| #define AB8500_SW_CONTROL_FALLBACK 0x03 |
| /* Wait for enumeration before charing in us */ |
| #define WAIT_ACA_RID_ENUMERATION (5 * 1000) |
| /*External charger control*/ |
| #define AB8500_SYS_CHARGER_CONTROL_REG 0x52 |
| #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03 |
| #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07 |
| |
| /* UsbLineStatus register - usb types */ |
| enum ab8500_charger_link_status { |
| USB_STAT_NOT_CONFIGURED, |
| USB_STAT_STD_HOST_NC, |
| USB_STAT_STD_HOST_C_NS, |
| USB_STAT_STD_HOST_C_S, |
| USB_STAT_HOST_CHG_NM, |
| USB_STAT_HOST_CHG_HS, |
| USB_STAT_HOST_CHG_HS_CHIRP, |
| USB_STAT_DEDICATED_CHG, |
| USB_STAT_ACA_RID_A, |
| USB_STAT_ACA_RID_B, |
| USB_STAT_ACA_RID_C_NM, |
| USB_STAT_ACA_RID_C_HS, |
| USB_STAT_ACA_RID_C_HS_CHIRP, |
| USB_STAT_HM_IDGND, |
| USB_STAT_RESERVED, |
| USB_STAT_NOT_VALID_LINK, |
| USB_STAT_PHY_EN, |
| USB_STAT_SUP_NO_IDGND_VBUS, |
| USB_STAT_SUP_IDGND_VBUS, |
| USB_STAT_CHARGER_LINE_1, |
| USB_STAT_CARKIT_1, |
| USB_STAT_CARKIT_2, |
| USB_STAT_ACA_DOCK_CHARGER, |
| }; |
| |
| enum ab8500_usb_state { |
| AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ |
| AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ |
| AB8500_BM_USB_STATE_CONFIGURED, |
| AB8500_BM_USB_STATE_SUSPEND, |
| AB8500_BM_USB_STATE_RESUME, |
| AB8500_BM_USB_STATE_MAX, |
| }; |
| |
| /* VBUS input current limits supported in AB8500 in mA */ |
| #define USB_CH_IP_CUR_LVL_0P05 50 |
| #define USB_CH_IP_CUR_LVL_0P09 98 |
| #define USB_CH_IP_CUR_LVL_0P19 193 |
| #define USB_CH_IP_CUR_LVL_0P29 290 |
| #define USB_CH_IP_CUR_LVL_0P38 380 |
| #define USB_CH_IP_CUR_LVL_0P45 450 |
| #define USB_CH_IP_CUR_LVL_0P5 500 |
| #define USB_CH_IP_CUR_LVL_0P6 600 |
| #define USB_CH_IP_CUR_LVL_0P7 700 |
| #define USB_CH_IP_CUR_LVL_0P8 800 |
| #define USB_CH_IP_CUR_LVL_0P9 900 |
| #define USB_CH_IP_CUR_LVL_1P0 1000 |
| #define USB_CH_IP_CUR_LVL_1P1 1100 |
| #define USB_CH_IP_CUR_LVL_1P3 1300 |
| #define USB_CH_IP_CUR_LVL_1P4 1400 |
| #define USB_CH_IP_CUR_LVL_1P5 1500 |
| |
| #define VBAT_TRESH_IP_CUR_RED 3800 |
| |
| #define to_ab8500_charger_usb_device_info(x) container_of((x), \ |
| struct ab8500_charger, usb_chg) |
| #define to_ab8500_charger_ac_device_info(x) container_of((x), \ |
| struct ab8500_charger, ac_chg) |
| |
| /** |
| * struct ab8500_charger_interrupts - ab8500 interupts |
| * @name: name of the interrupt |
| * @isr function pointer to the isr |
| */ |
| struct ab8500_charger_interrupts { |
| char *name; |
| irqreturn_t (*isr)(int irq, void *data); |
| }; |
| |
| struct ab8500_charger_info { |
| int charger_connected; |
| int charger_online; |
| int charger_voltage; |
| int cv_active; |
| bool wd_expired; |
| int charger_current; |
| }; |
| |
| struct ab8500_charger_event_flags { |
| bool mainextchnotok; |
| bool main_thermal_prot; |
| bool usb_thermal_prot; |
| bool vbus_ovv; |
| bool usbchargernotok; |
| bool chgwdexp; |
| bool vbus_collapse; |
| bool vbus_drop_end; |
| }; |
| |
| struct ab8500_charger_usb_state { |
| int usb_current; |
| int usb_current_tmp; |
| enum ab8500_usb_state state; |
| enum ab8500_usb_state state_tmp; |
| spinlock_t usb_lock; |
| }; |
| |
| struct ab8500_charger_max_usb_in_curr { |
| int usb_type_max; |
| int set_max; |
| int calculated_max; |
| }; |
| |
| /** |
| * struct ab8500_charger - ab8500 Charger device information |
| * @dev: Pointer to the structure device |
| * @vbus_detected: VBUS detected |
| * @vbus_detected_start: |
| * VBUS detected during startup |
| * @ac_conn: This will be true when the AC charger has been plugged |
| * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC |
| * charger is enabled |
| * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB |
| * charger is enabled |
| * @vbat Battery voltage |
| * @old_vbat Previously measured battery voltage |
| * @usb_device_is_unrecognised USB device is unrecognised by the hardware |
| * @autopower Indicate if we should have automatic pwron after pwrloss |
| * @autopower_cfg platform specific power config support for "pwron after pwrloss" |
| * @invalid_charger_detect_state State when forcing AB to use invalid charger |
| * @is_aca_rid: Incicate if accessory is ACA type |
| * @current_stepping_sessions: |
| * Counter for current stepping sessions |
| * @parent: Pointer to the struct ab8500 |
| * @gpadc: Pointer to the struct gpadc |
| * @bm: Platform specific battery management information |
| * @flags: Structure for information about events triggered |
| * @usb_state: Structure for usb stack information |
| * @max_usb_in_curr: Max USB charger input current |
| * @ac_chg: AC charger power supply |
| * @usb_chg: USB charger power supply |
| * @ac: Structure that holds the AC charger properties |
| * @usb: Structure that holds the USB charger properties |
| * @regu: Pointer to the struct regulator |
| * @charger_wq: Work queue for the IRQs and checking HW state |
| * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals |
| * @pm_lock: Lock to prevent system to suspend |
| * @check_vbat_work Work for checking vbat threshold to adjust vbus current |
| * @check_hw_failure_work: Work for checking HW state |
| * @check_usbchgnotok_work: Work for checking USB charger not ok status |
| * @kick_wd_work: Work for kicking the charger watchdog in case |
| * of ABB rev 1.* due to the watchog logic bug |
| * @ac_charger_attached_work: Work for checking if AC charger is still |
| * connected |
| * @usb_charger_attached_work: Work for checking if USB charger is still |
| * connected |
| * @ac_work: Work for checking AC charger connection |
| * @detect_usb_type_work: Work for detecting the USB type connected |
| * @usb_link_status_work: Work for checking the new USB link status |
| * @usb_state_changed_work: Work for checking USB state |
| * @attach_work: Work for detecting USB type |
| * @vbus_drop_end_work: Work for detecting VBUS drop end |
| * @check_main_thermal_prot_work: |
| * Work for checking Main thermal status |
| * @check_usb_thermal_prot_work: |
| * Work for checking USB thermal status |
| * @charger_attached_mutex: For controlling the wakelock |
| */ |
| struct ab8500_charger { |
| struct device *dev; |
| bool vbus_detected; |
| bool vbus_detected_start; |
| bool ac_conn; |
| bool vddadc_en_ac; |
| bool vddadc_en_usb; |
| int vbat; |
| int old_vbat; |
| bool usb_device_is_unrecognised; |
| bool autopower; |
| bool autopower_cfg; |
| int invalid_charger_detect_state; |
| int is_aca_rid; |
| atomic_t current_stepping_sessions; |
| struct ab8500 *parent; |
| struct ab8500_gpadc *gpadc; |
| struct abx500_bm_data *bm; |
| struct ab8500_charger_event_flags flags; |
| struct ab8500_charger_usb_state usb_state; |
| struct ab8500_charger_max_usb_in_curr max_usb_in_curr; |
| struct ux500_charger ac_chg; |
| struct ux500_charger usb_chg; |
| struct ab8500_charger_info ac; |
| struct ab8500_charger_info usb; |
| struct regulator *regu; |
| struct workqueue_struct *charger_wq; |
| struct mutex usb_ipt_crnt_lock; |
| struct delayed_work check_vbat_work; |
| struct delayed_work check_hw_failure_work; |
| struct delayed_work check_usbchgnotok_work; |
| struct delayed_work kick_wd_work; |
| struct delayed_work usb_state_changed_work; |
| struct delayed_work attach_work; |
| struct delayed_work ac_charger_attached_work; |
| struct delayed_work usb_charger_attached_work; |
| struct delayed_work vbus_drop_end_work; |
| struct work_struct ac_work; |
| struct work_struct detect_usb_type_work; |
| struct work_struct usb_link_status_work; |
| struct work_struct check_main_thermal_prot_work; |
| struct work_struct check_usb_thermal_prot_work; |
| struct usb_phy *usb_phy; |
| struct notifier_block nb; |
| struct mutex charger_attached_mutex; |
| }; |
| |
| /* AC properties */ |
| static enum power_supply_property ab8500_charger_ac_props[] = { |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| }; |
| |
| /* USB properties */ |
| static enum power_supply_property ab8500_charger_usb_props[] = { |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| }; |
| |
| /* |
| * Function for enabling and disabling sw fallback mode |
| * should always be disabled when no charger is connected. |
| */ |
| static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, |
| bool fallback) |
| { |
| u8 val; |
| u8 reg; |
| u8 bank; |
| u8 bit; |
| int ret; |
| |
| dev_dbg(di->dev, "SW Fallback: %d\n", fallback); |
| |
| if (is_ab8500(di->parent)) { |
| bank = 0x15; |
| reg = 0x0; |
| bit = 3; |
| } else { |
| bank = AB8500_SYS_CTRL1_BLOCK; |
| reg = AB8500_SW_CONTROL_FALLBACK; |
| bit = 0; |
| } |
| |
| /* read the register containing fallback bit */ |
| ret = abx500_get_register_interruptible(di->dev, bank, reg, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%d read failed\n", __LINE__); |
| return; |
| } |
| |
| if (is_ab8500(di->parent)) { |
| /* enable the OPT emulation registers */ |
| ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); |
| if (ret) { |
| dev_err(di->dev, "%d write failed\n", __LINE__); |
| goto disable_otp; |
| } |
| } |
| |
| if (fallback) |
| val |= (1 << bit); |
| else |
| val &= ~(1 << bit); |
| |
| /* write back the changed fallback bit value to register */ |
| ret = abx500_set_register_interruptible(di->dev, bank, reg, val); |
| if (ret) { |
| dev_err(di->dev, "%d write failed\n", __LINE__); |
| } |
| |
| disable_otp: |
| if (is_ab8500(di->parent)) { |
| /* disable the set OTP registers again */ |
| ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); |
| if (ret) { |
| dev_err(di->dev, "%d write failed\n", __LINE__); |
| } |
| } |
| } |
| |
| /** |
| * ab8500_power_supply_changed - a wrapper with local extentions for |
| * power_supply_changed |
| * @di: pointer to the ab8500_charger structure |
| * @psy: pointer to power_supply_that have changed. |
| * |
| */ |
| static void ab8500_power_supply_changed(struct ab8500_charger *di, |
| struct power_supply *psy) |
| { |
| if (di->autopower_cfg) { |
| if (!di->usb.charger_connected && |
| !di->ac.charger_connected && |
| di->autopower) { |
| di->autopower = false; |
| ab8500_enable_disable_sw_fallback(di, false); |
| } else if (!di->autopower && |
| (di->ac.charger_connected || |
| di->usb.charger_connected)) { |
| di->autopower = true; |
| ab8500_enable_disable_sw_fallback(di, true); |
| } |
| } |
| power_supply_changed(psy); |
| } |
| |
| static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, |
| bool connected) |
| { |
| if (connected != di->usb.charger_connected) { |
| dev_dbg(di->dev, "USB connected:%i\n", connected); |
| di->usb.charger_connected = connected; |
| |
| if (!connected) |
| di->flags.vbus_drop_end = false; |
| |
| sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present"); |
| |
| if (connected) { |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| |
| if (is_ab8500(di->parent)) |
| queue_delayed_work(di->charger_wq, |
| &di->usb_charger_attached_work, |
| HZ); |
| } else { |
| cancel_delayed_work_sync(&di->usb_charger_attached_work); |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| } |
| } |
| } |
| |
| /** |
| * ab8500_charger_get_ac_voltage() - get ac charger voltage |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Returns ac charger voltage (on success) |
| */ |
| static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) |
| { |
| int vch; |
| |
| /* Only measure voltage if the charger is connected */ |
| if (di->ac.charger_connected) { |
| vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); |
| if (vch < 0) |
| dev_err(di->dev, "%s gpadc conv failed,\n", __func__); |
| } else { |
| vch = 0; |
| } |
| return vch; |
| } |
| |
| /** |
| * ab8500_charger_ac_cv() - check if the main charger is in CV mode |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Returns ac charger CV mode (on success) else error code |
| */ |
| static int ab8500_charger_ac_cv(struct ab8500_charger *di) |
| { |
| u8 val; |
| int ret = 0; |
| |
| /* Only check CV mode if the charger is online */ |
| if (di->ac.charger_online) { |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_STATUS1_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return 0; |
| } |
| |
| if (val & MAIN_CH_CV_ON) |
| ret = 1; |
| else |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_get_vbus_voltage() - get vbus voltage |
| * @di: pointer to the ab8500_charger structure |
| * |
| * This function returns the vbus voltage. |
| * Returns vbus voltage (on success) |
| */ |
| static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) |
| { |
| int vch; |
| |
| /* Only measure voltage if the charger is connected */ |
| if (di->usb.charger_connected) { |
| vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); |
| if (vch < 0) |
| dev_err(di->dev, "%s gpadc conv failed\n", __func__); |
| } else { |
| vch = 0; |
| } |
| return vch; |
| } |
| |
| /** |
| * ab8500_charger_get_usb_current() - get usb charger current |
| * @di: pointer to the ab8500_charger structure |
| * |
| * This function returns the usb charger current. |
| * Returns usb current (on success) and error code on failure |
| */ |
| static int ab8500_charger_get_usb_current(struct ab8500_charger *di) |
| { |
| int ich; |
| |
| /* Only measure current if the charger is online */ |
| if (di->usb.charger_online) { |
| ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); |
| if (ich < 0) |
| dev_err(di->dev, "%s gpadc conv failed\n", __func__); |
| } else { |
| ich = 0; |
| } |
| return ich; |
| } |
| |
| /** |
| * ab8500_charger_get_ac_current() - get ac charger current |
| * @di: pointer to the ab8500_charger structure |
| * |
| * This function returns the ac charger current. |
| * Returns ac current (on success) and error code on failure. |
| */ |
| static int ab8500_charger_get_ac_current(struct ab8500_charger *di) |
| { |
| int ich; |
| |
| /* Only measure current if the charger is online */ |
| if (di->ac.charger_online) { |
| ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); |
| if (ich < 0) |
| dev_err(di->dev, "%s gpadc conv failed\n", __func__); |
| } else { |
| ich = 0; |
| } |
| return ich; |
| } |
| |
| /** |
| * ab8500_charger_usb_cv() - check if the usb charger is in CV mode |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Returns ac charger CV mode (on success) else error code |
| */ |
| static int ab8500_charger_usb_cv(struct ab8500_charger *di) |
| { |
| int ret; |
| u8 val; |
| |
| /* Only check CV mode if the charger is online */ |
| if (di->usb.charger_online) { |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_USBCH_STAT1_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return 0; |
| } |
| |
| if (val & USB_CH_CV_ON) |
| ret = 1; |
| else |
| ret = 0; |
| } else { |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_detect_chargers() - Detect the connected chargers |
| * @di: pointer to the ab8500_charger structure |
| * @probe: if probe, don't delay and wait for HW |
| * |
| * Returns the type of charger connected. |
| * For USB it will not mean we can actually charge from it |
| * but that there is a USB cable connected that we have to |
| * identify. This is used during startup when we don't get |
| * interrupts of the charger detection |
| * |
| * Returns an integer value, that means, |
| * NO_PW_CONN no power supply is connected |
| * AC_PW_CONN if the AC power supply is connected |
| * USB_PW_CONN if the USB power supply is connected |
| * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected |
| */ |
| static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) |
| { |
| int result = NO_PW_CONN; |
| int ret; |
| u8 val; |
| |
| /* Check for AC charger */ |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_STATUS1_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| |
| if (val & MAIN_CH_DET) |
| result = AC_PW_CONN; |
| |
| /* Check for USB charger */ |
| |
| if (!probe) { |
| /* |
| * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100 |
| * when disconnecting ACA even though no |
| * charger was connected. Try waiting a little |
| * longer than the 100 ms of VBUS_DET_DBNC100... |
| */ |
| msleep(110); |
| } |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_USBCH_STAT1_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| dev_dbg(di->dev, |
| "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, |
| val); |
| if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) |
| result |= USB_PW_CONN; |
| |
| return result; |
| } |
| |
| /** |
| * ab8500_charger_max_usb_curr() - get the max curr for the USB type |
| * @di: pointer to the ab8500_charger structure |
| * @link_status: the identified USB type |
| * |
| * Get the maximum current that is allowed to be drawn from the host |
| * based on the USB type. |
| * Returns error code in case of failure else 0 on success |
| */ |
| static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, |
| enum ab8500_charger_link_status link_status) |
| { |
| int ret = 0; |
| |
| di->usb_device_is_unrecognised = false; |
| |
| /* |
| * Platform only supports USB 2.0. |
| * This means that charging current from USB source |
| * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_* |
| * should set USB_CH_IP_CUR_LVL_0P5. |
| */ |
| |
| switch (link_status) { |
| case USB_STAT_STD_HOST_NC: |
| case USB_STAT_STD_HOST_C_NS: |
| case USB_STAT_STD_HOST_C_S: |
| dev_dbg(di->dev, "USB Type - Standard host is " |
| "detected through USB driver\n"); |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_HOST_CHG_HS_CHIRP: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_HOST_CHG_HS: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_ACA_RID_C_HS: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_ACA_RID_A: |
| /* |
| * Dedicated charger level minus maximum current accessory |
| * can consume (900mA). Closest level is 500mA |
| */ |
| dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n"); |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| di->is_aca_rid = 1; |
| break; |
| case USB_STAT_ACA_RID_B: |
| /* |
| * Dedicated charger level minus 120mA (20mA for ACA and |
| * 100mA for potential accessory). Closest level is 1300mA |
| */ |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3; |
| dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
| di->max_usb_in_curr.usb_type_max); |
| di->is_aca_rid = 1; |
| break; |
| case USB_STAT_HOST_CHG_NM: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_DEDICATED_CHG: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
| di->is_aca_rid = 0; |
| break; |
| case USB_STAT_ACA_RID_C_HS_CHIRP: |
| case USB_STAT_ACA_RID_C_NM: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; |
| di->is_aca_rid = 1; |
| break; |
| case USB_STAT_NOT_CONFIGURED: |
| if (di->vbus_detected) { |
| di->usb_device_is_unrecognised = true; |
| dev_dbg(di->dev, "USB Type - Legacy charger.\n"); |
| di->max_usb_in_curr.usb_type_max = |
| USB_CH_IP_CUR_LVL_1P5; |
| break; |
| } |
| case USB_STAT_HM_IDGND: |
| dev_err(di->dev, "USB Type - Charging not allowed\n"); |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
| ret = -ENXIO; |
| break; |
| case USB_STAT_RESERVED: |
| if (is_ab8500(di->parent)) { |
| di->flags.vbus_collapse = true; |
| dev_err(di->dev, "USB Type - USB_STAT_RESERVED " |
| "VBUS has collapsed\n"); |
| ret = -ENXIO; |
| break; |
| } else { |
| dev_dbg(di->dev, "USB Type - Charging not allowed\n"); |
| di->max_usb_in_curr.usb_type_max = |
| USB_CH_IP_CUR_LVL_0P05; |
| dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
| link_status, |
| di->max_usb_in_curr.usb_type_max); |
| ret = -ENXIO; |
| break; |
| } |
| case USB_STAT_CARKIT_1: |
| case USB_STAT_CARKIT_2: |
| case USB_STAT_ACA_DOCK_CHARGER: |
| case USB_STAT_CHARGER_LINE_1: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, |
| di->max_usb_in_curr.usb_type_max); |
| break; |
| case USB_STAT_NOT_VALID_LINK: |
| dev_err(di->dev, "USB Type invalid - try charging anyway\n"); |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| break; |
| |
| default: |
| dev_err(di->dev, "USB Type - Unknown\n"); |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
| ret = -ENXIO; |
| break; |
| }; |
| |
| di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
| dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", |
| link_status, di->max_usb_in_curr.set_max); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_read_usb_type() - read the type of usb connected |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Detect the type of the plugged USB |
| * Returns error code in case of failure else 0 on success |
| */ |
| static int ab8500_charger_read_usb_type(struct ab8500_charger *di) |
| { |
| int ret; |
| u8 val; |
| |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| if (is_ab8500(di->parent)) |
| ret = abx500_get_register_interruptible(di->dev, AB8500_USB, |
| AB8500_USB_LINE_STAT_REG, &val); |
| else |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| |
| /* get the USB type */ |
| if (is_ab8500(di->parent)) |
| val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; |
| else |
| val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; |
| ret = ab8500_charger_max_usb_curr(di, |
| (enum ab8500_charger_link_status) val); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_detect_usb_type() - get the type of usb connected |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Detect the type of the plugged USB |
| * Returns error code in case of failure else 0 on success |
| */ |
| static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) |
| { |
| int i, ret; |
| u8 val; |
| |
| /* |
| * On getting the VBUS rising edge detect interrupt there |
| * is a 250ms delay after which the register UsbLineStatus |
| * is filled with valid data. |
| */ |
| for (i = 0; i < 10; i++) { |
| msleep(250); |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, |
| &val); |
| dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", |
| __func__, val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| |
| if (is_ab8500(di->parent)) |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); |
| else |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return ret; |
| } |
| dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, |
| val); |
| /* |
| * Until the IT source register is read the UsbLineStatus |
| * register is not updated, hence doing the same |
| * Revisit this: |
| */ |
| |
| /* get the USB type */ |
| if (is_ab8500(di->parent)) |
| val = (val & AB8500_USB_LINK_STATUS) >> |
| USB_LINK_STATUS_SHIFT; |
| else |
| val = (val & AB8505_USB_LINK_STATUS) >> |
| USB_LINK_STATUS_SHIFT; |
| if (val) |
| break; |
| } |
| ret = ab8500_charger_max_usb_curr(di, |
| (enum ab8500_charger_link_status) val); |
| |
| return ret; |
| } |
| |
| /* |
| * This array maps the raw hex value to charger voltage used by the AB8500 |
| * Values taken from the UM0836 |
| */ |
| static int ab8500_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 , |
| 4060 , |
| 4070 , |
| 4080 , |
| 4090 , |
| 4100 , |
| 4110 , |
| 4120 , |
| 4130 , |
| 4140 , |
| 4150 , |
| 4160 , |
| 4170 , |
| 4180 , |
| 4190 , |
| 4200 , |
| 4210 , |
| 4220 , |
| 4230 , |
| 4240 , |
| 4250 , |
| 4260 , |
| 4270 , |
| 4280 , |
| 4290 , |
| 4300 , |
| 4310 , |
| 4320 , |
| 4330 , |
| 4340 , |
| 4350 , |
| 4360 , |
| 4370 , |
| 4380 , |
| 4390 , |
| 4400 , |
| 4410 , |
| 4420 , |
| 4430 , |
| 4440 , |
| 4450 , |
| 4460 , |
| 4470 , |
| 4480 , |
| 4490 , |
| 4500 , |
| 4510 , |
| 4520 , |
| 4530 , |
| 4540 , |
| 4550 , |
| 4560 , |
| 4570 , |
| 4580 , |
| 4590 , |
| 4600 , |
| }; |
| |
| static int ab8500_voltage_to_regval(int voltage) |
| { |
| int i; |
| |
| /* Special case for voltage below 3.5V */ |
| if (voltage < ab8500_charger_voltage_map[0]) |
| return LOW_VOLT_REG; |
| |
| for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { |
| if (voltage < ab8500_charger_voltage_map[i]) |
| return i - 1; |
| } |
| |
| /* If not last element, return error */ |
| i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; |
| if (voltage == ab8500_charger_voltage_map[i]) |
| return i; |
| else |
| return -1; |
| } |
| |
| static int ab8500_current_to_regval(struct ab8500_charger *di, int curr) |
| { |
| int i; |
| |
| if (curr < di->bm->chg_output_curr[0]) |
| return 0; |
| |
| for (i = 0; i < di->bm->n_chg_out_curr; i++) { |
| if (curr < di->bm->chg_output_curr[i]) |
| return i - 1; |
| } |
| |
| /* If not last element, return error */ |
| i = di->bm->n_chg_out_curr - 1; |
| if (curr == di->bm->chg_output_curr[i]) |
| return i; |
| else |
| return -1; |
| } |
| |
| static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr) |
| { |
| int i; |
| |
| if (curr < di->bm->chg_input_curr[0]) |
| return 0; |
| |
| for (i = 0; i < di->bm->n_chg_in_curr; i++) { |
| if (curr < di->bm->chg_input_curr[i]) |
| return i - 1; |
| } |
| |
| /* If not last element, return error */ |
| i = di->bm->n_chg_in_curr - 1; |
| if (curr == di->bm->chg_input_curr[i]) |
| return i; |
| else |
| return -1; |
| } |
| |
| /** |
| * ab8500_charger_get_usb_cur() - get usb current |
| * @di: pointer to the ab8500_charger structre |
| * |
| * The usb stack provides the maximum current that can be drawn from |
| * the standard usb host. This will be in mA. |
| * This function converts current in mA to a value that can be written |
| * to the register. Returns -1 if charging is not allowed |
| */ |
| static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) |
| { |
| int ret = 0; |
| switch (di->usb_state.usb_current) { |
| case 100: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09; |
| break; |
| case 200: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19; |
| break; |
| case 300: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29; |
| break; |
| case 400: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38; |
| break; |
| case 500: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; |
| break; |
| default: |
| di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; |
| ret = -EPERM; |
| break; |
| }; |
| di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_check_continue_stepping() - Check to allow stepping |
| * @di: pointer to the ab8500_charger structure |
| * @reg: select what charger register to check |
| * |
| * Check if current stepping should be allowed to continue. |
| * Checks if charger source has not collapsed. If it has, further stepping |
| * is not allowed. |
| */ |
| static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di, |
| int reg) |
| { |
| if (reg == AB8500_USBCH_IPT_CRNTLVL_REG) |
| return !di->flags.vbus_drop_end; |
| else |
| return true; |
| } |
| |
| /** |
| * ab8500_charger_set_current() - set charger current |
| * @di: pointer to the ab8500_charger structure |
| * @ich: charger current, in mA |
| * @reg: select what charger register to set |
| * |
| * Set charger current. |
| * There is no state machine in the AB to step up/down the charger |
| * current to avoid dips and spikes on MAIN, VBUS and VBAT when |
| * charging is started. Instead we need to implement |
| * this charger current step-up/down here. |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_set_current(struct ab8500_charger *di, |
| int ich, int reg) |
| { |
| int ret = 0; |
| int curr_index, prev_curr_index, shift_value, i; |
| u8 reg_value; |
| u32 step_udelay; |
| bool no_stepping = false; |
| |
| atomic_inc(&di->current_stepping_sessions); |
| |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| reg, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s read failed\n", __func__); |
| goto exit_set_current; |
| } |
| |
| switch (reg) { |
| case AB8500_MCH_IPT_CURLVL_REG: |
| shift_value = MAIN_CH_INPUT_CURR_SHIFT; |
| prev_curr_index = (reg_value >> shift_value); |
| curr_index = ab8500_current_to_regval(di, ich); |
| step_udelay = STEP_UDELAY; |
| if (!di->ac.charger_connected) |
| no_stepping = true; |
| break; |
| case AB8500_USBCH_IPT_CRNTLVL_REG: |
| if (is_ab8540(di->parent)) |
| shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT; |
| else |
| shift_value = VBUS_IN_CURR_LIM_SHIFT; |
| prev_curr_index = (reg_value >> shift_value); |
| curr_index = ab8500_vbus_in_curr_to_regval(di, ich); |
| step_udelay = STEP_UDELAY * 100; |
| |
| if (!di->usb.charger_connected) |
| no_stepping = true; |
| break; |
| case AB8500_CH_OPT_CRNTLVL_REG: |
| shift_value = 0; |
| prev_curr_index = (reg_value >> shift_value); |
| curr_index = ab8500_current_to_regval(di, ich); |
| step_udelay = STEP_UDELAY; |
| if (curr_index && (curr_index - prev_curr_index) > 1) |
| step_udelay *= 100; |
| |
| if (!di->usb.charger_connected && !di->ac.charger_connected) |
| no_stepping = true; |
| |
| break; |
| default: |
| dev_err(di->dev, "%s current register not valid\n", __func__); |
| ret = -ENXIO; |
| goto exit_set_current; |
| } |
| |
| if (curr_index < 0) { |
| dev_err(di->dev, "requested current limit out-of-range\n"); |
| ret = -ENXIO; |
| goto exit_set_current; |
| } |
| |
| /* only update current if it's been changed */ |
| if (prev_curr_index == curr_index) { |
| dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", |
| __func__, reg); |
| ret = 0; |
| goto exit_set_current; |
| } |
| |
| dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", |
| __func__, ich, reg); |
| |
| if (no_stepping) { |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| reg, (u8)curr_index << shift_value); |
| if (ret) |
| dev_err(di->dev, "%s write failed\n", __func__); |
| } else if (prev_curr_index > curr_index) { |
| for (i = prev_curr_index - 1; i >= curr_index; i--) { |
| dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", |
| (u8) i << shift_value, reg); |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, reg, (u8)i << shift_value); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| goto exit_set_current; |
| } |
| if (i != curr_index) |
| usleep_range(step_udelay, step_udelay * 2); |
| } |
| } else { |
| bool allow = true; |
| for (i = prev_curr_index + 1; i <= curr_index && allow; i++) { |
| dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", |
| (u8)i << shift_value, reg); |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, reg, (u8)i << shift_value); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| goto exit_set_current; |
| } |
| if (i != curr_index) |
| usleep_range(step_udelay, step_udelay * 2); |
| |
| allow = ab8500_charger_check_continue_stepping(di, reg); |
| } |
| } |
| |
| exit_set_current: |
| atomic_dec(&di->current_stepping_sessions); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit |
| * @di: pointer to the ab8500_charger structure |
| * @ich_in: charger input current limit |
| * |
| * Sets the current that can be drawn from the USB host |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, |
| int ich_in) |
| { |
| int min_value; |
| int ret; |
| |
| /* We should always use to lowest current limit */ |
| min_value = min(di->bm->chg_params->usb_curr_max, ich_in); |
| if (di->max_usb_in_curr.set_max > 0) |
| min_value = min(di->max_usb_in_curr.set_max, min_value); |
| |
| if (di->usb_state.usb_current >= 0) |
| min_value = min(di->usb_state.usb_current, min_value); |
| |
| switch (min_value) { |
| case 100: |
| if (di->vbat < VBAT_TRESH_IP_CUR_RED) |
| min_value = USB_CH_IP_CUR_LVL_0P05; |
| break; |
| case 500: |
| if (di->vbat < VBAT_TRESH_IP_CUR_RED) |
| min_value = USB_CH_IP_CUR_LVL_0P45; |
| break; |
| default: |
| break; |
| } |
| |
| dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value); |
| |
| mutex_lock(&di->usb_ipt_crnt_lock); |
| ret = ab8500_charger_set_current(di, min_value, |
| AB8500_USBCH_IPT_CRNTLVL_REG); |
| mutex_unlock(&di->usb_ipt_crnt_lock); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_set_main_in_curr() - set main charger input current |
| * @di: pointer to the ab8500_charger structure |
| * @ich_in: input charger current, in mA |
| * |
| * Set main charger input current. |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di, |
| int ich_in) |
| { |
| return ab8500_charger_set_current(di, ich_in, |
| AB8500_MCH_IPT_CURLVL_REG); |
| } |
| |
| /** |
| * ab8500_charger_set_output_curr() - set charger output current |
| * @di: pointer to the ab8500_charger structure |
| * @ich_out: output charger current, in mA |
| * |
| * Set charger output current. |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_set_output_curr(struct ab8500_charger *di, |
| int ich_out) |
| { |
| return ab8500_charger_set_current(di, ich_out, |
| AB8500_CH_OPT_CRNTLVL_REG); |
| } |
| |
| /** |
| * ab8500_charger_led_en() - turn on/off chargign led |
| * @di: pointer to the ab8500_charger structure |
| * @on: flag to turn on/off the chargign led |
| * |
| * Power ON/OFF charging LED indication |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_led_en(struct ab8500_charger *di, int on) |
| { |
| int ret; |
| |
| if (on) { |
| /* Power ON charging LED indicator, set LED current to 5mA */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_LED_INDICATOR_PWM_CTRL, |
| (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); |
| if (ret) { |
| dev_err(di->dev, "Power ON LED failed\n"); |
| return ret; |
| } |
| /* LED indicator PWM duty cycle 252/256 */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_LED_INDICATOR_PWM_DUTY, |
| LED_INDICATOR_PWM_DUTY_252_256); |
| if (ret) { |
| dev_err(di->dev, "Set LED PWM duty cycle failed\n"); |
| return ret; |
| } |
| } else { |
| /* Power off charging LED indicator */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_LED_INDICATOR_PWM_CTRL, |
| LED_INDICATOR_PWM_DIS); |
| if (ret) { |
| dev_err(di->dev, "Power-off LED failed\n"); |
| return ret; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_ac_en() - enable or disable ac charging |
| * @di: pointer to the ab8500_charger structure |
| * @enable: enable/disable flag |
| * @vset: charging voltage |
| * @iset: charging current |
| * |
| * Enable/Disable AC/Mains charging and turns on/off the charging led |
| * respectively. |
| **/ |
| static int ab8500_charger_ac_en(struct ux500_charger *charger, |
| int enable, int vset, int iset) |
| { |
| int ret; |
| int volt_index; |
| int curr_index; |
| int input_curr_index; |
| u8 overshoot = 0; |
| |
| struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); |
| |
| if (enable) { |
| /* Check if AC is connected */ |
| if (!di->ac.charger_connected) { |
| dev_err(di->dev, "AC charger not connected\n"); |
| return -ENXIO; |
| } |
| |
| /* Enable AC charging */ |
| dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); |
| |
| /* |
| * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts |
| * will be triggered everytime we enable the VDD ADC supply. |
| * This will turn off charging for a short while. |
| * It can be avoided by having the supply on when |
| * there is a charger enabled. Normally the VDD ADC supply |
| * is enabled everytime a GPADC conversion is triggered. We will |
| * force it to be enabled from this driver to have |
| * the GPADC module independant of the AB8500 chargers |
| */ |
| if (!di->vddadc_en_ac) { |
| ret = regulator_enable(di->regu); |
| if (ret) |
| dev_warn(di->dev, |
| "Failed to enable regulator\n"); |
| else |
| di->vddadc_en_ac = true; |
| } |
| |
| /* Check if the requested voltage or current is valid */ |
| volt_index = ab8500_voltage_to_regval(vset); |
| curr_index = ab8500_current_to_regval(di, iset); |
| input_curr_index = ab8500_current_to_regval(di, |
| di->bm->chg_params->ac_curr_max); |
| if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { |
| dev_err(di->dev, |
| "Charger voltage or current too high, " |
| "charging not started\n"); |
| return -ENXIO; |
| } |
| |
| /* ChVoltLevel: maximum battery charging voltage */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_VOLT_LVL_REG, (u8) volt_index); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| /* MainChInputCurr: current that can be drawn from the charger*/ |
| ret = ab8500_charger_set_main_in_curr(di, |
| di->bm->chg_params->ac_curr_max); |
| if (ret) { |
| dev_err(di->dev, "%s Failed to set MainChInputCurr\n", |
| __func__); |
| return ret; |
| } |
| /* ChOutputCurentLevel: protected output current */ |
| ret = ab8500_charger_set_output_curr(di, iset); |
| if (ret) { |
| dev_err(di->dev, "%s " |
| "Failed to set ChOutputCurentLevel\n", |
| __func__); |
| return ret; |
| } |
| |
| /* Check if VBAT overshoot control should be enabled */ |
| if (!di->bm->enable_overshoot) |
| overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; |
| |
| /* Enable Main Charger */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| /* Power on charging LED indication */ |
| ret = ab8500_charger_led_en(di, true); |
| if (ret < 0) |
| dev_err(di->dev, "failed to enable LED\n"); |
| |
| di->ac.charger_online = 1; |
| } else { |
| /* Disable AC charging */ |
| if (is_ab8500_1p1_or_earlier(di->parent)) { |
| /* |
| * For ABB revision 1.0 and 1.1 there is a bug in the |
| * watchdog logic. That means we have to continously |
| * kick the charger watchdog even when no charger is |
| * connected. This is only valid once the AC charger |
| * has been enabled. This is a bug that is not handled |
| * by the algorithm and the watchdog have to be kicked |
| * by the charger driver when the AC charger |
| * is disabled |
| */ |
| if (di->ac_conn) { |
| queue_delayed_work(di->charger_wq, |
| &di->kick_wd_work, |
| round_jiffies(WD_KICK_INTERVAL)); |
| } |
| |
| /* |
| * We can't turn off charging completely |
| * due to a bug in AB8500 cut1. |
| * If we do, charging will not start again. |
| * That is why we set the lowest voltage |
| * and current possible |
| */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); |
| if (ret) { |
| dev_err(di->dev, |
| "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| ret = ab8500_charger_set_output_curr(di, 0); |
| if (ret) { |
| dev_err(di->dev, "%s " |
| "Failed to set ChOutputCurentLevel\n", |
| __func__); |
| return ret; |
| } |
| } else { |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_MCH_CTRL1, 0); |
| if (ret) { |
| dev_err(di->dev, |
| "%s write failed\n", __func__); |
| return ret; |
| } |
| } |
| |
| ret = ab8500_charger_led_en(di, false); |
| if (ret < 0) |
| dev_err(di->dev, "failed to disable LED\n"); |
| |
| di->ac.charger_online = 0; |
| di->ac.wd_expired = false; |
| |
| /* Disable regulator if enabled */ |
| if (di->vddadc_en_ac) { |
| regulator_disable(di->regu); |
| di->vddadc_en_ac = false; |
| } |
| |
| dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); |
| } |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_usb_en() - enable usb charging |
| * @di: pointer to the ab8500_charger structure |
| * @enable: enable/disable flag |
| * @vset: charging voltage |
| * @ich_out: charger output current |
| * |
| * Enable/Disable USB charging and turns on/off the charging led respectively. |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_usb_en(struct ux500_charger *charger, |
| int enable, int vset, int ich_out) |
| { |
| int ret; |
| int volt_index; |
| int curr_index; |
| u8 overshoot = 0; |
| |
| struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); |
| |
| if (enable) { |
| /* Check if USB is connected */ |
| if (!di->usb.charger_connected) { |
| dev_err(di->dev, "USB charger not connected\n"); |
| return -ENXIO; |
| } |
| |
| /* |
| * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts |
| * will be triggered everytime we enable the VDD ADC supply. |
| * This will turn off charging for a short while. |
| * It can be avoided by having the supply on when |
| * there is a charger enabled. Normally the VDD ADC supply |
| * is enabled everytime a GPADC conversion is triggered. We will |
| * force it to be enabled from this driver to have |
| * the GPADC module independant of the AB8500 chargers |
| */ |
| if (!di->vddadc_en_usb) { |
| ret = regulator_enable(di->regu); |
| if (ret) |
| dev_warn(di->dev, |
| "Failed to enable regulator\n"); |
| else |
| di->vddadc_en_usb = true; |
| } |
| |
| /* Enable USB charging */ |
| dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); |
| |
| /* Check if the requested voltage or current is valid */ |
| volt_index = ab8500_voltage_to_regval(vset); |
| curr_index = ab8500_current_to_regval(di, ich_out); |
| if (volt_index < 0 || curr_index < 0) { |
| dev_err(di->dev, |
| "Charger voltage or current too high, " |
| "charging not started\n"); |
| return -ENXIO; |
| } |
| |
| /* ChVoltLevel: max voltage upto which battery can be charged */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_VOLT_LVL_REG, (u8) volt_index); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| /* Check if VBAT overshoot control should be enabled */ |
| if (!di->bm->enable_overshoot) |
| overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; |
| |
| /* Enable USB Charger */ |
| dev_dbg(di->dev, |
| "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n"); |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| /* If success power on charging LED indication */ |
| ret = ab8500_charger_led_en(di, true); |
| if (ret < 0) |
| dev_err(di->dev, "failed to enable LED\n"); |
| |
| di->usb.charger_online = 1; |
| |
| /* USBChInputCurr: current that can be drawn from the usb */ |
| ret = ab8500_charger_set_vbus_in_curr(di, |
| di->max_usb_in_curr.usb_type_max); |
| if (ret) { |
| dev_err(di->dev, "setting USBChInputCurr failed\n"); |
| return ret; |
| } |
| |
| /* ChOutputCurentLevel: protected output current */ |
| ret = ab8500_charger_set_output_curr(di, ich_out); |
| if (ret) { |
| dev_err(di->dev, "%s " |
| "Failed to set ChOutputCurentLevel\n", |
| __func__); |
| return ret; |
| } |
| |
| queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); |
| |
| } else { |
| /* Disable USB charging */ |
| dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_USBCH_CTRL1_REG, 0); |
| if (ret) { |
| dev_err(di->dev, |
| "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| ret = ab8500_charger_led_en(di, false); |
| if (ret < 0) |
| dev_err(di->dev, "failed to disable LED\n"); |
| /* USBChInputCurr: current that can be drawn from the usb */ |
| ret = ab8500_charger_set_vbus_in_curr(di, 0); |
| if (ret) { |
| dev_err(di->dev, "setting USBChInputCurr failed\n"); |
| return ret; |
| } |
| |
| /* ChOutputCurentLevel: protected output current */ |
| ret = ab8500_charger_set_output_curr(di, 0); |
| if (ret) { |
| dev_err(di->dev, "%s " |
| "Failed to reset ChOutputCurentLevel\n", |
| __func__); |
| return ret; |
| } |
| di->usb.charger_online = 0; |
| di->usb.wd_expired = false; |
| |
| /* Disable regulator if enabled */ |
| if (di->vddadc_en_usb) { |
| regulator_disable(di->regu); |
| di->vddadc_en_usb = false; |
| } |
| |
| dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); |
| |
| /* Cancel any pending Vbat check work */ |
| cancel_delayed_work(&di->check_vbat_work); |
| |
| } |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| |
| return ret; |
| } |
| |
| static int ab8500_external_charger_prepare(struct notifier_block *charger_nb, |
| unsigned long event, void *data) |
| { |
| int ret; |
| struct device *dev = data; |
| /*Toggle External charger control pin*/ |
| ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, |
| AB8500_SYS_CHARGER_CONTROL_REG, |
| EXTERNAL_CHARGER_DISABLE_REG_VAL); |
| if (ret < 0) { |
| dev_err(dev, "write reg failed %d\n", ret); |
| goto out; |
| } |
| ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, |
| AB8500_SYS_CHARGER_CONTROL_REG, |
| EXTERNAL_CHARGER_ENABLE_REG_VAL); |
| if (ret < 0) |
| dev_err(dev, "Write reg failed %d\n", ret); |
| |
| out: |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_usb_check_enable() - enable usb charging |
| * @charger: pointer to the ux500_charger structure |
| * @vset: charging voltage |
| * @iset: charger output current |
| * |
| * Check if the VBUS charger has been disconnected and reconnected without |
| * AB8500 rising an interrupt. Returns 0 on success. |
| */ |
| static int ab8500_charger_usb_check_enable(struct ux500_charger *charger, |
| int vset, int iset) |
| { |
| u8 usbch_ctrl1 = 0; |
| int ret = 0; |
| |
| struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); |
| |
| if (!di->usb.charger_connected) |
| return ret; |
| |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_USBCH_CTRL1_REG, &usbch_ctrl1); |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); |
| return ret; |
| } |
| dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1); |
| |
| if (!(usbch_ctrl1 & USB_CH_ENA)) { |
| dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); |
| |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CHARGER_CTRL, |
| DROP_COUNT_RESET, DROP_COUNT_RESET); |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); |
| return ret; |
| } |
| |
| ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset); |
| if (ret < 0) { |
| dev_err(di->dev, "Failed to enable VBUS charger %d\n", |
| __LINE__); |
| return ret; |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_ac_check_enable() - enable usb charging |
| * @charger: pointer to the ux500_charger structure |
| * @vset: charging voltage |
| * @iset: charger output current |
| * |
| * Check if the AC charger has been disconnected and reconnected without |
| * AB8500 rising an interrupt. Returns 0 on success. |
| */ |
| static int ab8500_charger_ac_check_enable(struct ux500_charger *charger, |
| int vset, int iset) |
| { |
| u8 mainch_ctrl1 = 0; |
| int ret = 0; |
| |
| struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); |
| |
| if (!di->ac.charger_connected) |
| return ret; |
| |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_MCH_CTRL1, &mainch_ctrl1); |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); |
| return ret; |
| } |
| dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1); |
| |
| if (!(mainch_ctrl1 & MAIN_CH_ENA)) { |
| dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); |
| |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CHARGER_CTRL, |
| DROP_COUNT_RESET, DROP_COUNT_RESET); |
| |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); |
| return ret; |
| } |
| |
| ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset); |
| if (ret < 0) { |
| dev_err(di->dev, "failed to enable AC charger %d\n", |
| __LINE__); |
| return ret; |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_watchdog_kick() - kick charger watchdog |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Kick charger watchdog |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) |
| { |
| int ret; |
| struct ab8500_charger *di; |
| |
| if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) |
| di = to_ab8500_charger_ac_device_info(charger); |
| else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
| di = to_ab8500_charger_usb_device_info(charger); |
| else |
| return -ENXIO; |
| |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); |
| if (ret) |
| dev_err(di->dev, "Failed to kick WD!\n"); |
| |
| return ret; |
| } |
| |
| /** |
| * ab8500_charger_update_charger_current() - update charger current |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Update the charger output current for the specified charger |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_update_charger_current(struct ux500_charger *charger, |
| int ich_out) |
| { |
| int ret; |
| struct ab8500_charger *di; |
| |
| if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) |
| di = to_ab8500_charger_ac_device_info(charger); |
| else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
| di = to_ab8500_charger_usb_device_info(charger); |
| else |
| return -ENXIO; |
| |
| ret = ab8500_charger_set_output_curr(di, ich_out); |
| if (ret) { |
| dev_err(di->dev, "%s " |
| "Failed to set ChOutputCurentLevel\n", |
| __func__); |
| return ret; |
| } |
| |
| /* Reset the main and usb drop input current measurement counter */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CHARGER_CTRL, DROP_COUNT_RESET); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ab8540_charger_power_path_enable() - enable usb power path mode |
| * @charger: pointer to the ux500_charger structure |
| * @enable: enable/disable flag |
| * |
| * Enable or disable the power path for usb mode |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8540_charger_power_path_enable(struct ux500_charger *charger, |
| bool enable) |
| { |
| int ret; |
| struct ab8500_charger *di; |
| |
| if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
| di = to_ab8500_charger_usb_device_info(charger); |
| else |
| return -ENXIO; |
| |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8540_USB_PP_MODE_REG, |
| BUS_POWER_PATH_MODE_ENA, enable); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| |
| /** |
| * ab8540_charger_usb_pre_chg_enable() - enable usb pre change |
| * @charger: pointer to the ux500_charger structure |
| * @enable: enable/disable flag |
| * |
| * Enable or disable the pre-chage for usb mode |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger, |
| bool enable) |
| { |
| int ret; |
| struct ab8500_charger *di; |
| |
| if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) |
| di = to_ab8500_charger_usb_device_info(charger); |
| else |
| return -ENXIO; |
| |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8540_USB_PP_CHR_REG, |
| BUS_POWER_PATH_PRECHG_ENA, enable); |
| if (ret) { |
| dev_err(di->dev, "%s write failed\n", __func__); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) |
| { |
| struct power_supply *psy; |
| struct power_supply *ext; |
| struct ab8500_charger *di; |
| union power_supply_propval ret; |
| int i, j; |
| bool psy_found = false; |
| struct ux500_charger *usb_chg; |
| |
| usb_chg = (struct ux500_charger *)data; |
| psy = usb_chg->psy; |
| |
| di = to_ab8500_charger_usb_device_info(usb_chg); |
| |
| ext = dev_get_drvdata(dev); |
| |
| /* 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->desc->name)) |
| psy_found = true; |
| } |
| |
| if (!psy_found) |
| return 0; |
| |
| /* Go through all properties for the psy */ |
| for (j = 0; j < ext->desc->num_properties; j++) { |
| enum power_supply_property prop; |
| prop = ext->desc->properties[j]; |
| |
| if (power_supply_get_property(ext, prop, &ret)) |
| continue; |
| |
| switch (prop) { |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| switch (ext->desc->type) { |
| case POWER_SUPPLY_TYPE_BATTERY: |
| di->vbat = ret.intval / 1000; |
| break; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| /** |
| * ab8500_charger_check_vbat_work() - keep vbus current within spec |
| * @work pointer to the work_struct structure |
| * |
| * Due to a asic bug it is necessary to lower the input current to the vbus |
| * charger when charging with at some specific levels. This issue is only valid |
| * for below a certain battery voltage. This function makes sure that the |
| * the allowed current limit isn't exceeded. |
| */ |
| static void ab8500_charger_check_vbat_work(struct work_struct *work) |
| { |
| int t = 10; |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, check_vbat_work.work); |
| |
| class_for_each_device(power_supply_class, NULL, |
| di->usb_chg.psy, ab8500_charger_get_ext_psy_data); |
| |
| /* First run old_vbat is 0. */ |
| if (di->old_vbat == 0) |
| di->old_vbat = di->vbat; |
| |
| if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && |
| di->vbat <= VBAT_TRESH_IP_CUR_RED) || |
| (di->old_vbat > VBAT_TRESH_IP_CUR_RED && |
| di->vbat > VBAT_TRESH_IP_CUR_RED))) { |
| |
| dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," |
| " old: %d\n", di->max_usb_in_curr.usb_type_max, |
| di->vbat, di->old_vbat); |
| ab8500_charger_set_vbus_in_curr(di, |
| di->max_usb_in_curr.usb_type_max); |
| power_supply_changed(di->usb_chg.psy); |
| } |
| |
| di->old_vbat = di->vbat; |
| |
| /* |
| * No need to check the battery voltage every second when not close to |
| * the threshold. |
| */ |
| if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && |
| (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) |
| t = 1; |
| |
| queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); |
| } |
| |
| /** |
| * ab8500_charger_check_hw_failure_work() - check main charger failure |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for checking the main charger status |
| */ |
| static void ab8500_charger_check_hw_failure_work(struct work_struct *work) |
| { |
| int ret; |
| u8 reg_value; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, check_hw_failure_work.work); |
| |
| /* Check if the status bits for HW failure is still active */ |
| if (di->flags.mainextchnotok) { |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return; |
| } |
| if (!(reg_value & MAIN_CH_NOK)) { |
| di->flags.mainextchnotok = false; |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| } |
| } |
| if (di->flags.vbus_ovv) { |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, |
| ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return; |
| } |
| if (!(reg_value & VBUS_OVV_TH)) { |
| di->flags.vbus_ovv = false; |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| } |
| /* If we still have a failure, schedule a new check */ |
| if (di->flags.mainextchnotok || di->flags.vbus_ovv) { |
| queue_delayed_work(di->charger_wq, |
| &di->check_hw_failure_work, round_jiffies(HZ)); |
| } |
| } |
| |
| /** |
| * ab8500_charger_kick_watchdog_work() - kick the watchdog |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for kicking the charger watchdog. |
| * |
| * For ABB revision 1.0 and 1.1 there is a bug in the watchdog |
| * logic. That means we have to continously kick the charger |
| * watchdog even when no charger is connected. This is only |
| * valid once the AC charger has been enabled. This is |
| * a bug that is not handled by the algorithm and the |
| * watchdog have to be kicked by the charger driver |
| * when the AC charger is disabled |
| */ |
| static void ab8500_charger_kick_watchdog_work(struct work_struct *work) |
| { |
| int ret; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, kick_wd_work.work); |
| |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); |
| if (ret) |
| dev_err(di->dev, "Failed to kick WD!\n"); |
| |
| /* Schedule a new watchdog kick */ |
| queue_delayed_work(di->charger_wq, |
| &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); |
| } |
| |
| /** |
| * ab8500_charger_ac_work() - work to get and set main charger status |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for checking the main charger status |
| */ |
| static void ab8500_charger_ac_work(struct work_struct *work) |
| { |
| int ret; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, ac_work); |
| |
| /* |
| * 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 status register |
| */ |
| ret = ab8500_charger_detect_chargers(di, false); |
| if (ret < 0) |
| return; |
| |
| if (ret & AC_PW_CONN) { |
| di->ac.charger_connected = 1; |
| di->ac_conn = true; |
| } else { |
| di->ac.charger_connected = 0; |
| } |
| |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); |
| } |
| |
| static void ab8500_charger_usb_attached_work(struct work_struct *work) |
| { |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, |
| usb_charger_attached_work.work); |
| int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC); |
| int ret, i; |
| u8 statval; |
| |
| for (i = 0; i < 10; i++) { |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_CH_USBCH_STAT1_REG, |
| &statval); |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); |
| goto reschedule; |
| } |
| if ((statval & usbch) != usbch) |
| goto reschedule; |
| |
| msleep(CHARGER_STATUS_POLL); |
| } |
| |
| ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0); |
| |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| |
| return; |
| |
| reschedule: |
| queue_delayed_work(di->charger_wq, |
| &di->usb_charger_attached_work, |
| HZ); |
| } |
| |
| static void ab8500_charger_ac_attached_work(struct work_struct *work) |
| { |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, |
| ac_charger_attached_work.work); |
| int mainch = (MAIN_CH_STATUS2_MAINCHGDROP | |
| MAIN_CH_STATUS2_MAINCHARGERDETDBNC); |
| int ret, i; |
| u8 statval; |
| |
| for (i = 0; i < 10; i++) { |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_CH_STATUS2_REG, |
| &statval); |
| if (ret < 0) { |
| dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); |
| goto reschedule; |
| } |
| |
| if ((statval & mainch) != mainch) |
| goto reschedule; |
| |
| msleep(CHARGER_STATUS_POLL); |
| } |
| |
| ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0); |
| queue_work(di->charger_wq, &di->ac_work); |
| |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| |
| return; |
| |
| reschedule: |
| queue_delayed_work(di->charger_wq, |
| &di->ac_charger_attached_work, |
| HZ); |
| } |
| |
| /** |
| * ab8500_charger_detect_usb_type_work() - work to detect USB type |
| * @work: Pointer to the work_struct structure |
| * |
| * Detect the type of USB plugged |
| */ |
| static void ab8500_charger_detect_usb_type_work(struct work_struct *work) |
| { |
| int ret; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, detect_usb_type_work); |
| |
| /* |
| * Since we can't be sure that the events are received |
| * synchronously, we have the check if is |
| * connected by reading the status register |
| */ |
| ret = ab8500_charger_detect_chargers(di, false); |
| if (ret < 0) |
| return; |
| |
| if (!(ret & USB_PW_CONN)) { |
| dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); |
| di->vbus_detected = false; |
| ab8500_charger_set_usb_connected(di, false); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } else { |
| dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); |
| di->vbus_detected = true; |
| |
| if (is_ab8500_1p1_or_earlier(di->parent)) { |
| ret = ab8500_charger_detect_usb_type(di); |
| if (!ret) { |
| ab8500_charger_set_usb_connected(di, true); |
| ab8500_power_supply_changed(di, |
| di->usb_chg.psy); |
| } |
| } else { |
| /* |
| * For ABB cut2.0 and onwards we have an IRQ, |
| * USB_LINK_STATUS that will be triggered when the USB |
| * link status changes. The exception is USB connected |
| * during startup. Then we don't get a |
| * USB_LINK_STATUS IRQ |
| */ |
| if (di->vbus_detected_start) { |
| di->vbus_detected_start = false; |
| ret = ab8500_charger_detect_usb_type(di); |
| if (!ret) { |
| ab8500_charger_set_usb_connected(di, |
| true); |
| ab8500_power_supply_changed(di, |
| di->usb_chg.psy); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * ab8500_charger_usb_link_attach_work() - work to detect USB type |
| * @work: pointer to the work_struct structure |
| * |
| * Detect the type of USB plugged |
| */ |
| static void ab8500_charger_usb_link_attach_work(struct work_struct *work) |
| { |
| struct ab8500_charger *di = |
| container_of(work, struct ab8500_charger, attach_work.work); |
| int ret; |
| |
| /* Update maximum input current if USB enumeration is not detected */ |
| if (!di->usb.charger_online) { |
| ret = ab8500_charger_set_vbus_in_curr(di, |
| di->max_usb_in_curr.usb_type_max); |
| if (ret) |
| return; |
| } |
| |
| ab8500_charger_set_usb_connected(di, true); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| |
| /** |
| * ab8500_charger_usb_link_status_work() - work to detect USB type |
| * @work: pointer to the work_struct structure |
| * |
| * Detect the type of USB plugged |
| */ |
| static void ab8500_charger_usb_link_status_work(struct work_struct *work) |
| { |
| int detected_chargers; |
| int ret; |
| u8 val; |
| u8 link_status; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, usb_link_status_work); |
| |
| /* |
| * Since we can't be sure that the events are received |
| * synchronously, we have the check if is |
| * connected by reading the status register |
| */ |
| detected_chargers = ab8500_charger_detect_chargers(di, false); |
| if (detected_chargers < 0) |
| return; |
| |
| /* |
| * Some chargers that breaks the USB spec is |
| * identified as invalid by AB8500 and it refuse |
| * to start the charging process. but by jumping |
| * thru a few hoops it can be forced to start. |
| */ |
| if (is_ab8500(di->parent)) |
| ret = abx500_get_register_interruptible(di->dev, AB8500_USB, |
| AB8500_USB_LINE_STAT_REG, &val); |
| else |
| ret = abx500_get_register_interruptible(di->dev, AB8500_USB, |
| AB8500_USB_LINK1_STAT_REG, &val); |
| |
| if (ret >= 0) |
| dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val); |
| else |
| dev_dbg(di->dev, "Error reading USB link status\n"); |
| |
| if (is_ab8500(di->parent)) |
| link_status = AB8500_USB_LINK_STATUS; |
| else |
| link_status = AB8505_USB_LINK_STATUS; |
| |
| if (detected_chargers & USB_PW_CONN) { |
| if (((val & link_status) >> USB_LINK_STATUS_SHIFT) == |
| USB_STAT_NOT_VALID_LINK && |
| di->invalid_charger_detect_state == 0) { |
| dev_dbg(di->dev, |
| "Invalid charger detected, state= 0\n"); |
| /*Enable charger*/ |
| abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_USBCH_CTRL1_REG, |
| USB_CH_ENA, USB_CH_ENA); |
| /*Enable charger detection*/ |
| abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINE_CTRL2_REG, |
| USB_CH_DET, USB_CH_DET); |
| di->invalid_charger_detect_state = 1; |
| /*exit and wait for new link status interrupt.*/ |
| return; |
| |
| } |
| if (di->invalid_charger_detect_state == 1) { |
| dev_dbg(di->dev, |
| "Invalid charger detected, state= 1\n"); |
| /*Stop charger detection*/ |
| abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINE_CTRL2_REG, |
| USB_CH_DET, 0x00); |
| /*Check link status*/ |
| if (is_ab8500(di->parent)) |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINE_STAT_REG, |
| &val); |
| else |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_USB, AB8500_USB_LINK1_STAT_REG, |
| &val); |
| |
| dev_dbg(di->dev, "USB link status= 0x%02x\n", |
| (val & link_status) >> USB_LINK_STATUS_SHIFT); |
| di->invalid_charger_detect_state = 2; |
| } |
| } else { |
| di->invalid_charger_detect_state = 0; |
| } |
| |
| if (!(detected_chargers & USB_PW_CONN)) { |
| di->vbus_detected = false; |
| ab8500_charger_set_usb_connected(di, false); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| return; |
| } |
| |
| dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); |
| di->vbus_detected = true; |
| ret = ab8500_charger_read_usb_type(di); |
| if (ret) { |
| if (ret == -ENXIO) { |
| /* No valid charger type detected */ |
| ab8500_charger_set_usb_connected(di, false); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| return; |
| } |
| |
| if (di->usb_device_is_unrecognised) { |
| dev_dbg(di->dev, |
| "Potential Legacy Charger device. " |
| "Delay work for %d msec for USB enum " |
| "to finish", |
| WAIT_ACA_RID_ENUMERATION); |
| queue_delayed_work(di->charger_wq, |
| &di->attach_work, |
| msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); |
| } else if (di->is_aca_rid == 1) { |
| /* Only wait once */ |
| di->is_aca_rid++; |
| dev_dbg(di->dev, |
| "%s Wait %d msec for USB enum to finish", |
| __func__, WAIT_ACA_RID_ENUMERATION); |
| queue_delayed_work(di->charger_wq, |
| &di->attach_work, |
| msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); |
| } else { |
| queue_delayed_work(di->charger_wq, |
| &di->attach_work, |
| 0); |
| } |
| } |
| |
| static void ab8500_charger_usb_state_changed_work(struct work_struct *work) |
| { |
| int ret; |
| unsigned long flags; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, usb_state_changed_work.work); |
| |
| if (!di->vbus_detected) { |
| dev_dbg(di->dev, |
| "%s !di->vbus_detected\n", |
| __func__); |
| return; |
| } |
| |
| spin_lock_irqsave(&di->usb_state.usb_lock, flags); |
| di->usb_state.state = di->usb_state.state_tmp; |
| di->usb_state.usb_current = di->usb_state.usb_current_tmp; |
| spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); |
| |
| dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", |
| __func__, di->usb_state.state, di->usb_state.usb_current); |
| |
| switch (di->usb_state.state) { |
| case AB8500_BM_USB_STATE_RESET_HS: |
| case AB8500_BM_USB_STATE_RESET_FS: |
| case AB8500_BM_USB_STATE_SUSPEND: |
| case AB8500_BM_USB_STATE_MAX: |
| ab8500_charger_set_usb_connected(di, false); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| break; |
| |
| case AB8500_BM_USB_STATE_RESUME: |
| /* |
| * when suspend->resume there should be delay |
| * of 1sec for enabling charging |
| */ |
| msleep(1000); |
| /* Intentional fall through */ |
| case AB8500_BM_USB_STATE_CONFIGURED: |
| /* |
| * USB is configured, enable charging with the charging |
| * input current obtained from USB driver |
| */ |
| if (!ab8500_charger_get_usb_cur(di)) { |
| /* Update maximum input current */ |
| ret = ab8500_charger_set_vbus_in_curr(di, |
| di->max_usb_in_curr.usb_type_max); |
| if (ret) |
| return; |
| |
| ab8500_charger_set_usb_connected(di, true); |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| break; |
| |
| default: |
| break; |
| }; |
| } |
| |
| /** |
| * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for checking the USB charger Not OK status |
| */ |
| static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) |
| { |
| int ret; |
| u8 reg_value; |
| bool prev_status; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, check_usbchgnotok_work.work); |
| |
| /* Check if the status bit for usbchargernotok is still active */ |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return; |
| } |
| prev_status = di->flags.usbchargernotok; |
| |
| if (reg_value & VBUS_CH_NOK) { |
| di->flags.usbchargernotok = true; |
| /* Check again in 1sec */ |
| queue_delayed_work(di->charger_wq, |
| &di->check_usbchgnotok_work, HZ); |
| } else { |
| di->flags.usbchargernotok = false; |
| di->flags.vbus_collapse = false; |
| } |
| |
| if (prev_status != di->flags.usbchargernotok) |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| |
| /** |
| * ab8500_charger_check_main_thermal_prot_work() - check main thermal status |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for checking the Main thermal prot status |
| */ |
| static void ab8500_charger_check_main_thermal_prot_work( |
| struct work_struct *work) |
| { |
| int ret; |
| u8 reg_value; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, check_main_thermal_prot_work); |
| |
| /* Check if the status bit for main_thermal_prot is still active */ |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return; |
| } |
| if (reg_value & MAIN_CH_TH_PROT) |
| di->flags.main_thermal_prot = true; |
| else |
| di->flags.main_thermal_prot = false; |
| |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| } |
| |
| /** |
| * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status |
| * @work: pointer to the work_struct structure |
| * |
| * Work queue function for checking the USB thermal prot status |
| */ |
| static void ab8500_charger_check_usb_thermal_prot_work( |
| struct work_struct *work) |
| { |
| int ret; |
| u8 reg_value; |
| |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, check_usb_thermal_prot_work); |
| |
| /* Check if the status bit for usb_thermal_prot is still active */ |
| ret = abx500_get_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s ab8500 read failed\n", __func__); |
| return; |
| } |
| if (reg_value & USB_CH_TH_PROT) |
| di->flags.usb_thermal_prot = true; |
| else |
| di->flags.usb_thermal_prot = false; |
| |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| |
| /** |
| * ab8500_charger_mainchunplugdet_handler() - main charger unplugged |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "Main charger unplugged\n"); |
| queue_work(di->charger_wq, &di->ac_work); |
| |
| cancel_delayed_work_sync(&di->ac_charger_attached_work); |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_mainchplugdet_handler() - main charger plugged |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "Main charger plugged\n"); |
| queue_work(di->charger_wq, &di->ac_work); |
| |
| mutex_lock(&di->charger_attached_mutex); |
| mutex_unlock(&di->charger_attached_mutex); |
| |
| if (is_ab8500(di->parent)) |
| queue_delayed_work(di->charger_wq, |
| &di->ac_charger_attached_work, |
| HZ); |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_mainextchnotok_handler() - main charger not ok |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "Main charger not ok\n"); |
| di->flags.mainextchnotok = true; |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| |
| /* Schedule a new HW failure check */ |
| queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger |
| * thermal protection threshold |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, |
| "Die temp above Main charger thermal protection threshold\n"); |
| queue_work(di->charger_wq, &di->check_main_thermal_prot_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger |
| * thermal protection threshold |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, |
| "Die temp ok for Main charger thermal protection threshold\n"); |
| queue_work(di->charger_wq, &di->check_main_thermal_prot_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void ab8500_charger_vbus_drop_end_work(struct work_struct *work) |
| { |
| struct ab8500_charger *di = container_of(work, |
| struct ab8500_charger, vbus_drop_end_work.work); |
| int ret, curr; |
| u8 reg_value; |
| |
| di->flags.vbus_drop_end = false; |
| |
| /* Reset the drop counter */ |
| abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01); |
| |
| if (is_ab8540(di->parent)) |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8540_CH_USBCH_STAT3_REG, ®_value); |
| else |
| ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_USBCH_STAT2_REG, ®_value); |
| if (ret < 0) { |
| dev_err(di->dev, "%s read failed\n", __func__); |
| return; |
| } |
| |
| if (is_ab8540(di->parent)) |
| curr = di->bm->chg_input_curr[ |
| reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK]; |
| else |
| curr = di->bm->chg_input_curr[ |
| reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT]; |
| |
| if (di->max_usb_in_curr.calculated_max != curr) { |
| /* USB source is collapsing */ |
| di->max_usb_in_curr.calculated_max = curr; |
| dev_dbg(di->dev, |
| "VBUS input current limiting to %d mA\n", |
| di->max_usb_in_curr.calculated_max); |
| } else { |
| /* |
| * USB source can not give more than this amount. |
| * Taking more will collapse the source. |
| */ |
| di->max_usb_in_curr.set_max = |
| di->max_usb_in_curr.calculated_max; |
| dev_dbg(di->dev, |
| "VBUS input current limited to %d mA\n", |
| di->max_usb_in_curr.set_max); |
| } |
| |
| if (di->usb.charger_connected) |
| ab8500_charger_set_vbus_in_curr(di, |
| di->max_usb_in_curr.usb_type_max); |
| } |
| |
| /** |
| * ab8500_charger_vbusdetf_handler() - VBUS falling detected |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| di->vbus_detected = false; |
| dev_dbg(di->dev, "VBUS falling detected\n"); |
| queue_work(di->charger_wq, &di->detect_usb_type_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_vbusdetr_handler() - VBUS rising detected |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| di->vbus_detected = true; |
| dev_dbg(di->dev, "VBUS rising detected\n"); |
| |
| queue_work(di->charger_wq, &di->detect_usb_type_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_usblinkstatus_handler() - USB link status has changed |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "USB link status changed\n"); |
| |
| queue_work(di->charger_wq, &di->usb_link_status_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger |
| * thermal protection threshold |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, |
| "Die temp above USB charger thermal protection threshold\n"); |
| queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger |
| * thermal protection threshold |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, |
| "Die temp ok for USB charger thermal protection threshold\n"); |
| queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "Not allowed USB charger detected\n"); |
| queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_chwdexp_handler() - Charger watchdog expired |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "Charger watchdog expired\n"); |
| |
| /* |
| * The charger that was online when the watchdog expired |
| * needs to be restarted for charging to start again |
| */ |
| if (di->ac.charger_online) { |
| di->ac.wd_expired = true; |
| ab8500_power_supply_changed(di, di->ac_chg.psy); |
| } |
| if (di->usb.charger_online) { |
| di->usb.wd_expired = true; |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_vbuschdropend_handler() - VBUS drop removed |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "VBUS charger drop ended\n"); |
| di->flags.vbus_drop_end = true; |
| |
| /* |
| * VBUS might have dropped due to bad connection. |
| * Schedule a new input limit set to the value SW requests. |
| */ |
| queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, |
| round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ)); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected |
| * @irq: interrupt number |
| * @_di: pointer to the ab8500_charger structure |
| * |
| * Returns IRQ status(IRQ_HANDLED) |
| */ |
| static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di) |
| { |
| struct ab8500_charger *di = _di; |
| |
| dev_dbg(di->dev, "VBUS overvoltage detected\n"); |
| di->flags.vbus_ovv = true; |
| ab8500_power_supply_changed(di, di->usb_chg.psy); |
| |
| /* Schedule a new HW failure check */ |
| queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ab8500_charger_ac_get_property() - get the ac/mains 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 ac/mains |
| * properties by reading the sysfs files. |
| * AC/Mains properties are online, present and voltage. |
| * online: ac/mains charging is in progress or not |
| * present: presence of the ac/mains |
| * voltage: AC/Mains voltage |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_ac_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct ab8500_charger *di; |
| int ret; |
| |
| di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_HEALTH: |
| if (di->flags.mainextchnotok) |
| val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
| else if (di->ac.wd_expired || di->usb.wd_expired) |
| val->intval = POWER_SUPPLY_HEALTH_DEAD; |
| else if (di->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 = di->ac.charger_online; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = di->ac.charger_connected; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| ret = ab8500_charger_get_ac_voltage(di); |
| if (ret >= 0) |
| di->ac.charger_voltage = ret; |
| /* On error, use previous value */ |
| val->intval = di->ac.charger_voltage * 1000; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| /* |
| * This property is used to indicate when CV mode is entered |
| * for the AC charger |
| */ |
| di->ac.cv_active = ab8500_charger_ac_cv(di); |
| val->intval = di->ac.cv_active; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| ret = ab8500_charger_get_ac_current(di); |
| if (ret >= 0) |
| di->ac.charger_current = ret; |
| val->intval = di->ac.charger_current * 1000; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /** |
| * ab8500_charger_usb_get_property() - get the usb 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 usb |
| * properties by reading the sysfs files. |
| * USB properties are online, present and voltage. |
| * online: usb charging is in progress or not |
| * present: presence of the usb |
| * voltage: vbus voltage |
| * Returns error code in case of failure else 0(on success) |
| */ |
| static int ab8500_charger_usb_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct ab8500_charger *di; |
| int ret; |
| |
| di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_HEALTH: |
| if (di->flags.usbchargernotok) |
| val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
| else if (di->ac.wd_expired || di->usb.wd_expired) |
| val->intval = POWER_SUPPLY_HEALTH_DEAD; |
| else if (di->flags.usb_thermal_prot) |
| val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
| else if (di->flags.vbus_ovv) |
| val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| else |
| val->intval = POWER_SUPPLY_HEALTH_GOOD; |
| break; |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = di->usb.charger_online; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = di->usb.charger_connected; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| ret = ab8500_charger_get_vbus_voltage(di); |
| if (ret >= 0) |
| di->usb.charger_voltage = ret; |
| val->intval = di->usb.charger_voltage * 1000; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| /* |
| * This property is used to indicate when CV mode is entered |
| * for the USB charger |
| */ |
| di->usb.cv_active = ab8500_charger_usb_cv(di); |
| val->intval = di->usb.cv_active; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| ret = ab8500_charger_get_usb_current(di); |
| if (ret >= 0) |
| di->usb.charger_current = ret; |
| val->intval = di->usb.charger_current * 1000; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_AVG: |
| /* |
| * This property is used to indicate when VBUS has collapsed |
| * due to too high output current from the USB charger |
| */ |
| if (di->flags.vbus_collapse) |
| val->intval = 1; |
| else |
| val->intval = 0; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /** |
| * ab8500_charger_init_hw_registers() - Set up charger related registers |
| * @di: pointer to the ab8500_charger structure |
| * |
| * Set up charger OVV, watchdog and maximum voltage registers as well as |
| * charging of the backup battery |
| */ |
| static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) |
| { |
| int ret = 0; |
| u8 bup_vch_range = 0, vbup33_vrtcn = 0; |
| |
| /* Setup maximum charger current and voltage for ABB cut2.0 */ |
| if (!is_ab8500_1p1_or_earlier(di->parent)) { |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to set CH_VOLT_LVL_MAX_REG\n"); |
| goto out; |
| } |
| |
| if (is_ab8540(di->parent)) |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, |
| CH_OP_CUR_LVL_2P); |
| else |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, |
| CH_OP_CUR_LVL_1P6); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); |
| goto out; |
| } |
| } |
| |
| if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent) |
| || is_ab8505_2p0(di->parent) || is_ab8540(di->parent)) |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_USBCH_CTRL2_REG, |
| VBUS_AUTO_IN_CURR_LIM_ENA, |
| VBUS_AUTO_IN_CURR_LIM_ENA); |
| else |
| /* |
| * VBUS OVV set to 6.3V and enable automatic current limitation |
| */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_CHARGER, |
| AB8500_USBCH_CTRL2_REG, |
| VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to set automatic current limitation\n"); |
| goto out; |
| } |
| |
| /* Enable main watchdog in OTP */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); |
| if (ret) { |
| dev_err(di->dev, "failed to enable main WD in OTP\n"); |
| goto out; |
| } |
| |
| /* Enable main watchdog */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); |
| if (ret) { |
| dev_err(di->dev, "faile to enable main watchdog\n"); |
| goto out; |
| } |
| |
| /* |
| * Due to internal synchronisation, Enable and Kick watchdog bits |
| * cannot be enabled in a single write. |
| * A minimum delay of 2*32 kHz period (62.5µs) must be inserted |
| * between writing Enable then Kick bits. |
| */ |
| udelay(63); |
| |
| /* Kick main watchdog */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WDOG_CTRL_REG, |
| (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); |
| if (ret) { |
| dev_err(di->dev, "failed to kick main watchdog\n"); |
| goto out; |
| } |
| |
| /* Disable main watchdog */ |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); |
| if (ret) { |
| dev_err(di->dev, "failed to disable main watchdog\n"); |
| goto out; |
| } |
| |
| /* Set watchdog timeout */ |
| ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, |
| AB8500_CH_WD_TIMER_REG, WD_TIMER); |
| if (ret) { |
| dev_err(di->dev, "failed to set charger watchdog timeout\n"); |
| goto out; |
| } |
| |
| ret = ab8500_charger_led_en(di, false); |
| if (ret < 0) { |
| dev_err(di->dev, "failed to disable LED\n"); |
| goto out; |
| } |
| |
| /* Backup battery voltage and current */ |
| if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V) |
| bup_vch_range = BUP_VCH_RANGE; |
| if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V) |
| vbup33_vrtcn = VBUP33_VRTCN; |
| |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_RTC, |
| AB8500_RTC_BACKUP_CHG_REG, |
| (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i); |
| if (ret) { |
| dev_err(di->dev, "failed to setup backup battery charging\n"); |
| goto out; |
| } |
| if (is_ab8540(di->parent)) { |
| ret = abx500_set_register_interruptible(di->dev, |
| AB8500_RTC, |
| AB8500_RTC_CTRL1_REG, |
| bup_vch_range | vbup33_vrtcn); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to setup backup battery charging\n"); |
| goto out; |
| } |
| } |
| |
| /* Enable backup battery charging */ |
| abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_RTC, AB8500_RTC_CTRL_REG, |
| RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); |
| if (ret < 0) |
| dev_err(di->dev, "%s mask and set failed\n", __func__); |
| |
| if (is_ab8540(di->parent)) { |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8540_USB_PP_MODE_REG, |
| BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to setup usb power path vsys voltage\n"); |
| goto out; |
| } |
| ret = abx500_mask_and_set_register_interruptible(di->dev, |
| AB8500_CHARGER, AB8540_USB_PP_CHR_REG, |
| BUS_PP_PRECHG_CURRENT_MASK, 0); |
| if (ret) { |
| dev_err(di->dev, |
| "failed to setup usb power path prechage current\n"); |
| goto out; |
| } |
| } |
| |
| out: |
| return ret; |
| } |
| |
| /* |
| * ab8500 charger driver interrupts and their respective isr |
| */ |
| static struct ab8500_charger_interrupts ab8500_charger_irq[] = { |
| {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, |
| {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, |
| {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, |
| {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, |
| {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, |
| {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, |
| {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, |
| {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, |
| {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, |
|