| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Linux/drivers/power/supply/ (Linux Kernel Version 6.17.9©) Datei vom 24.10.2025 mit Größe 102 kB |
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Impressum ab8500_charger.c Sprache: C |
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// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) ST-Ericsson SA 2012 * * Charger driver for AB8500 * * 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/component.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/usb/otg.h> #include <linux/mutex.h> #include <linux/iio/consumer.h> #include "ab8500-bm.h" #include "ab8500-chargalg.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 AUTO_VBUS_IN_CURR_LIM_SHIFT 4 #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 uA */ #define USB_CH_IP_CUR_LVL_0P05 50000 #define USB_CH_IP_CUR_LVL_0P09 98000 #define USB_CH_IP_CUR_LVL_0P19 193000 #define USB_CH_IP_CUR_LVL_0P29 290000 #define USB_CH_IP_CUR_LVL_0P38 380000 #define USB_CH_IP_CUR_LVL_0P45 450000 #define USB_CH_IP_CUR_LVL_0P5 500000 #define USB_CH_IP_CUR_LVL_0P6 600000 #define USB_CH_IP_CUR_LVL_0P7 700000 #define USB_CH_IP_CUR_LVL_0P8 800000 #define USB_CH_IP_CUR_LVL_0P9 900000 #define USB_CH_IP_CUR_LVL_1P0 1000000 #define USB_CH_IP_CUR_LVL_1P1 1100000 #define USB_CH_IP_CUR_LVL_1P3 1300000 #define USB_CH_IP_CUR_LVL_1P4 1400000 #define USB_CH_IP_CUR_LVL_1P5 1500000 #define VBAT_TRESH_IP_CUR_RED 3800000 #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 interrupts * @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_uv; int cv_active; bool wd_expired; int charger_current_ua; }; 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_ua; int usb_current_tmp_ua; 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_ua; int set_max_ua; int calculated_max_ua; }; /** * 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 * @adc_main_charger_v ADC channel for main charger voltage * @adc_main_charger_c ADC channel for main charger current * @adc_vbus_v ADC channel for USB charger voltage * @adc_usb_charger_c ADC channel for USB charger current * @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 iio_channel *adc_main_charger_v; struct iio_channel *adc_main_charger_c; struct iio_channel *adc_vbus_v; struct iio_channel *adc_usb_charger_c; struct ab8500_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 extensions 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) { /* * This happens if we get notifications or interrupts and * the platform has been configured not to support one or * other type of charging. */ if (!psy) return; 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; /* * Sometimes the platform is configured not to support * USB charging and no psy has been created, but we still * will get these notifications. */ if (di->usb_chg.psy) { 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 in microvolt (on success) */ static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) { int vch, ret; /* Only measure voltage if the charger is connected */ if (di->ac.charger_connected) { /* Convert to microvolt, IIO returns millivolt */ ret = iio_read_channel_processed_scale(di->adc_main_charger_v, &vch, 1000); if (ret < 0) { dev_err(di->dev, "%s ADC conv failed\n", __func__); return ret; } } 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 in microvolt (on success) */ static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) { int vch, ret; /* Only measure voltage if the charger is connected */ if (di->usb.charger_connected) { /* Convert to microvolt, IIO returns millivolt */ ret = iio_read_channel_processed_scale(di->adc_vbus_v, &vch, 1000); if (ret < 0) { dev_err(di->dev, "%s ADC conv failed\n", __func__); return ret; } } 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 in microamperes (on success) and error code on failure */ static int ab8500_charger_get_usb_current(struct ab8500_charger *di) { int ich, ret; /* Only measure current if the charger is online */ if (di->usb.charger_online) { /* Return microamperes */ ret = iio_read_channel_processed_scale(di->adc_usb_charger_c, &ich, 1000); if (ret < 0) { dev_err(di->dev, "%s ADC conv failed\n", __func__); return ret; } } 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 in microamperes (on success) and error code on failure. */ static int ab8500_charger_get_ac_current(struct ab8500_charger *di) { int ich, ret; /* Only measure current if the charger is online */ if (di->ac.charger_online) { /* Return microamperes */ ret = iio_read_channel_processed_scale(di->adc_main_charger_c, &ich, 1000); if (ret < 0) { dev_err(di->dev, "%s ADC conv failed\n", __func__); return ret; } } 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 occurrence 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_ua = 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_ua = 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_ua = 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_ua = 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_ua = 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_ua = 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_ua); di->is_aca_rid = 1; break; case USB_STAT_HOST_CHG_NM: di->max_usb_in_curr.usb_type_max_ua = 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_ua = 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_ua = 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_ua = USB_CH_IP_CUR_LVL_1P5; break; } fallthrough; case USB_STAT_HM_IDGND: dev_err(di->dev, "USB Type - Charging not allowed\n"); di->max_usb_in_curr.usb_type_max_ua = 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_ua = 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_ua); 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_ua = 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_ua); 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_ua = USB_CH_IP_CUR_LVL_0P5; break; default: dev_err(di->dev, "USB Type - Unknown\n"); di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P05; ret = -ENXIO; break; } di->max_usb_in_curr.set_max_ua = di->max_usb_in_curr.usb_type_max_ua; dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, di->max_usb_in_curr.set_max_ua); 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, in microvolt. */ static int ab8500_charger_voltage_map[] = { 3500000, 3525000, 3550000, 3575000, 3600000, 3625000, 3650000, 3675000, 3700000, 3725000, 3750000, 3775000, 3800000, 3825000, 3850000, 3875000, 3900000, 3925000, 3950000, 3975000, 4000000, 4025000, 4050000, 4060000, 4070000, 4080000, 4090000, 4100000, 4110000, 4120000, 4130000, 4140000, 4150000, 4160000, 4170000, 4180000, 4190000, 4200000, 4210000, 4220000, 4230000, 4240000, 4250000, 4260000, 4270000, 4280000, 4290000, 4300000, 4310000, 4320000, 4330000, 4340000, 4350000, 4360000, 4370000, 4380000, 4390000, 4400000, 4410000, 4420000, 4430000, 4440000, 4450000, 4460000, 4470000, 4480000, 4490000, 4500000, 4510000, 4520000, 4530000, 4540000, 4550000, 4560000, 4570000, 4580000, 4590000, 4600000, }; static int ab8500_voltage_to_regval(int voltage_uv) { int i; /* Special case for voltage below 3.5V */ if (voltage_uv < ab8500_charger_voltage_map[0]) return LOW_VOLT_REG; for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { if (voltage_uv < ab8500_charger_voltage_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; if (voltage_uv == ab8500_charger_voltage_map[i]) return i; else return -1; } /* This array maps the raw register value to charger input current */ static int ab8500_charge_input_curr_map[] = { 50000, 98000, 193000, 290000, 380000, 450000, 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1300000, 1400000, 1500000, }; /* This array maps the raw register value to charger output current */ static int ab8500_charge_output_curr_map[] = { 100000, 200000, 300000, 400000, 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000, 1300000, 1400000, 1500000, 1500000, }; static int ab8500_current_to_regval(struct ab8500_charger *di, int curr_ua) { int i; if (curr_ua < ab8500_charge_output_curr_map[0]) return 0; for (i = 0; i < ARRAY_SIZE(ab8500_charge_output_curr_map); i++) { if (curr_ua < ab8500_charge_output_curr_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab8500_charge_output_curr_map) - 1; if (curr_ua == ab8500_charge_output_curr_map[i]) return i; else return -1; } static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr_ua) { int i; if (curr_ua < ab8500_charge_input_curr_map[0]) return 0; for (i = 0; i < ARRAY_SIZE(ab8500_charge_input_curr_map); i++) { if (curr_ua < ab8500_charge_input_curr_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab8500_charge_input_curr_map) - 1; if (curr_ua == ab8500_charge_input_curr_map[i]) return i; else return -1; } /** * ab8500_charger_get_usb_cur() - get usb current * @di: pointer to the ab8500_charger structure * * The usb stack provides the maximum current that can be drawn from * the standard usb host. This will be in uA. * This function converts current in uA 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_ua) { case 100000: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P09; break; case 200000: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P19; break; case 300000: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P29; break; case 400000: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P38; break; case 500000: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P5; break; default: di->max_usb_in_curr.usb_type_max_ua = USB_CH_IP_CUR_LVL_0P05; ret = -EPERM; break; } di->max_usb_in_curr.set_max_ua = di->max_usb_in_curr.usb_type_max_ua; 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_ua: charger current, in uA * @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_ua, 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_ua); step_udelay = STEP_UDELAY; if (!di->ac.charger_connected) no_stepping = true; break; case AB8500_USBCH_IPT_CRNTLVL_REG: shift_value = VBUS_IN_CURR_LIM_SHIFT; prev_curr_index = (reg_value >> shift_value); curr_index = ab8500_vbus_in_curr_to_regval(di, ich_ua); 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_ua); 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 uA for reg: 0x%02x\n", __func__, ich_ua, 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_ua: charger input current limit in microampere * * 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_ua) { int min_value; int ret; /* We should always use to lowest current limit */ min_value = min(di->bm->chg_params->usb_curr_max_ua, ich_in_ua); if (di->max_usb_in_curr.set_max_ua > 0) min_value = min(di->max_usb_in_curr.set_max_ua, min_value); if (di->usb_state.usb_current_ua >= 0) min_value = min(di->usb_state.usb_current_ua, min_value); switch (min_value) { case 100000: if (di->vbat < VBAT_TRESH_IP_CUR_RED) min_value = USB_CH_IP_CUR_LVL_0P05; break; case 500000: 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 uA\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_ua: input charger current, in uA * * 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_ua) { return ab8500_charger_set_current(di, ich_in_ua, AB8500_MCH_IPT_CURLVL_REG); } /** * ab8500_charger_set_output_curr() - set charger output current * @di: pointer to the ab8500_charger structure * @ich_out_ua: output charger current, in uA * * 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_ua) { return ab8500_charger_set_current(di, ich_out_ua, 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_uv: charging voltage in microvolt * @iset_ua: charging current in microampere * * 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_uv, int iset_ua) { 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: %duV %duA\n", vset_uv, iset_ua); /* * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts * will be triggered every time 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 every time a GPADC conversion is triggered. * We will force it to be enabled from this driver to have * the GPADC module independent 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_uv); curr_index = ab8500_current_to_regval(di, iset_ua); input_curr_index = ab8500_current_to_regval(di, di->bm->chg_params->ac_curr_max_ua); 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_ua); 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_ua); 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 continuously * 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_uv: charging voltage in microvolt * @ich_out_ua: charger output current in microampere * * 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_uv, int ich_out_ua) { 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 every time 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 every time a GPADC conversion is triggered. * We will force it to be enabled from this driver to have * the GPADC module independent 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: %d uV %d uA\n", vset_uv, ich_out_ua); /* Check if the requested voltage or current is valid */ volt_index = ab8500_voltage_to_regval(vset_uv); curr_index = ab8500_current_to_regval(di, ich_out_ua); 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 up to 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_ua); 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_ua); 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; } /** * ab8500_charger_usb_check_enable() - enable usb charging * @charger: pointer to the ux500_charger structure * @vset_uv: charging voltage in microvolt * @iset_ua: charger output current in microampere * * 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_uv, int iset_ua) { 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_uv, iset_ua); 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_uv: charging voltage in microvolt * @iset_ua: charger output current in micrompere * * 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_uv, int iset_ua) { 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_uv, iset_ua); 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 * @charger: pointer to the ab8500_charger structure * @ich_out_ua: desired output current in microampere * * 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_ua) { 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_ua); 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; } static int ab8500_charger_get_ext_psy_data(struct power_supply *ext, void *data) { struct power_supply *psy; const char **supplicants = (const char **)ext->supplied_to; struct ab8500_charger *di; union power_supply_propval ret; int j; struct ux500_charger *usb_chg; usb_chg = (struct ux500_charger *)data; psy = usb_chg->psy; di = to_ab8500_charger_usb_device_info(usb_chg); /* * For all psy where the driver name appears in any supplied_to * in practice what we will find will always be "ab8500_fg" as * the fuel gauge is responsible of keeping track of VBAT. */ j = match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) 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: /* This will always be "ab8500_fg" */ dev_dbg(di->dev, "get VBAT from %s\n", dev_name(&ext->dev)); di->vbat = ret.intval; 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 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); power_supply_for_each_psy(&di->usb_chg, 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_ua, di->vbat, di->old_vbat); ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr.usb_type_max_ua); 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 + 100000) && (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100000))) 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 continuously 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_ua); 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 * through 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_ua = di->usb_state.usb_current_tmp_ua; spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); dev_dbg(di->dev, "%s USB state: 0x%02x uA: %d\n", __func__, di->usb_state.state, di->usb_state.usb_current_ua); 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); fallthrough; 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_ua); 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_ua; 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); 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; } curr_ua = ab8500_charge_input_curr_map[ reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT]; if (di->max_usb_in_curr.calculated_max_ua != curr_ua) { /* USB source is collapsing */ di->max_usb_in_curr.calculated_max_ua = curr_ua; dev_dbg(di->dev, "VBUS input current limiting to %d uA\n", di->max_usb_in_curr.calculated_max_ua); } else { /* * USB source can not give more than this amount. * Taking more will collapse the source. */ di->max_usb_in_curr.set_max_ua = di->max_usb_in_curr.calculated_max_ua; dev_dbg(di->dev, "VBUS input current limited to %d uA\n", di->max_usb_in_curr.set_max_ua); } if (di->usb.charger_connected) ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr.usb_type_max_ua); } /** * 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_uv = ret; /* On error, use previous value */ val->intval = di->ac.charger_voltage_uv; 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_ua = ret; val->intval = di->ac.charger_current_ua; 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_uv = ret; val->intval = di->usb.charger_voltage_uv; 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_ua = ret; val->intval = di->usb.charger_current_ua; 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; /* 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; } 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_ab8505_2p0(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, "failed 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; } 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; } /* Enable backup battery charging */ ret = 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__); 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}, {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, {"VBUS_OVV", ab8500_charger_vbusovv_handler}, {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, }; static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, unsigned long event, void *power) { struct ab8500_charger *di = container_of(nb, struct ab8500_charger, nb); enum ab8500_usb_state bm_usb_state; /* * FIXME: it appears the AB8500 PHY never sends what it should here. * Fix the PHY driver to properly notify the desired current. * Also broadcast microampere and not milliampere. */ unsigned mA = *((unsigned *)power); if (event != USB_EVENT_VBUS) { dev_dbg(di->dev, "not a standard host, returning\n"); return NOTIFY_DONE; } /* TODO: State is fabricate here. See if charger really needs USB * state or if mA is enough */ if ((di->usb_state.usb_current_ua == 2000) && (mA > 2)) bm_usb_state = AB8500_BM_USB_STATE_RESUME; else if (mA == 0) bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; else if (mA == 2) bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; else if (mA >= 8) /* 8, 100, 500 */ bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; else /* Should never occur */ bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", __func__, bm_usb_state, mA); spin_lock(&di->usb_state.usb_lock); di->usb_state.state_tmp = bm_usb_state; /* FIXME: broadcast ua instead, see above */ di->usb_state.usb_current_tmp_ua = mA * 1000; spin_unlock(&di->usb_state.usb_lock); /* * wait for some time until you get updates from the usb stack * and negotiations are completed */ queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2); return NOTIFY_OK; } static int __maybe_unused ab8500_charger_resume(struct device *dev) { int ret; struct ab8500_charger *di = dev_get_drvdata(dev); /* * For ABB revision 1.0 and 1.1 there is a bug in the watchdog * logic. That means we have to continuously 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 && is_ab8500_1p1_or_earlier(di->parent)) { 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"); /* If not already pending start a new timer */ queue_delayed_work(di->charger_wq, &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); } /* If we still have a HW failure, schedule a new check */ if (di->flags.mainextchnotok || di->flags.vbus_ovv) { queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); } if (di->flags.vbus_drop_end) queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); return 0; } static int __maybe_unused ab8500_charger_suspend(struct device *dev) { struct ab8500_charger *di = dev_get_drvdata(dev); /* Cancel any pending jobs */ cancel_delayed_work(&di->check_hw_failure_work); cancel_delayed_work(&di->vbus_drop_end_work); flush_delayed_work(&di->attach_work); flush_delayed_work(&di->usb_charger_attached_work); flush_delayed_work(&di->ac_charger_attached_work); flush_delayed_work(&di->check_usbchgnotok_work); flush_delayed_work(&di->check_vbat_work); flush_delayed_work(&di->kick_wd_work); flush_work(&di->usb_link_status_work); flush_work(&di->ac_work); flush_work(&di->detect_usb_type_work); if (atomic_read(&di->current_stepping_sessions)) return -EAGAIN; return 0; } static char *supply_interface[] = { "ab8500_chargalg", "ab8500_fg", "ab8500_btemp", }; static const struct power_supply_desc ab8500_ac_chg_desc = { .name = "ab8500_ac", .type = POWER_SUPPLY_TYPE_MAINS, .properties = ab8500_charger_ac_props, .num_properties = ARRAY_SIZE(ab8500_charger_ac_props), .get_property = ab8500_charger_ac_get_property, }; static const struct power_supply_desc ab8500_usb_chg_desc = { .name = "ab8500_usb", .type = POWER_SUPPLY_TYPE_USB, .properties = ab8500_charger_usb_props, .num_properties = ARRAY_SIZE(ab8500_charger_usb_props), .get_property = ab8500_charger_usb_get_property, }; static int ab8500_charger_bind(struct device *dev) { struct ab8500_charger *di = dev_get_drvdata(dev); int ch_stat; int ret; /* Create a work queue for the charger */ di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq", WQ_MEM_RECLAIM); if (di->charger_wq == NULL) { dev_err(dev, "failed to create work queue\n"); return -ENOMEM; } ch_stat = ab8500_charger_detect_chargers(di, false); if (ch_stat & AC_PW_CONN) { if (is_ab8500(di->parent)) queue_delayed_work(di->charger_wq, &di->ac_charger_attached_work, HZ); } if (ch_stat & USB_PW_CONN) { if (is_ab8500(di->parent)) queue_delayed_work(di->charger_wq, &di->usb_charger_attached_work, HZ); di->vbus_detected = true; di->vbus_detected_start = true; queue_work(di->charger_wq, &di->detect_usb_type_work); } ret = component_bind_all(dev, di); if (ret) { dev_err(dev, "can't bind component devices\n"); destroy_workqueue(di->charger_wq); return ret; } return 0; } static void ab8500_charger_unbind(struct device *dev) { struct ab8500_charger *di = dev_get_drvdata(dev); int ret; /* Disable AC charging */ ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); /* Disable USB charging */ ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); /* Backup battery voltage and current disable */ ret = abx500_mask_and_set_register_interruptible(di->dev, AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); if (ret < 0) dev_err(di->dev, "%s mask and set failed\n", __func__); /* Delete the work queue */ destroy_workqueue(di->charger_wq); /* Unbind fg, btemp, algorithm */ component_unbind_all(dev, di); } static const struct component_master_ops ab8500_charger_comp_ops = { .bind = ab8500_charger_bind, .unbind = ab8500_charger_unbind, }; static struct platform_driver *const ab8500_charger_component_drivers[] = { &ab8500_fg_driver, &ab8500_btemp_driver, &ab8500_chargalg_driver, }; static int ab8500_charger_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct component_match *match = NULL; struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {}; struct ab8500_charger *di; int charger_status; int i, irq; int ret; di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); if (!di) return -ENOMEM; di->bm = &ab8500_bm_data; di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); /* get parent data */ di->dev = dev; di->parent = dev_get_drvdata(pdev->dev.parent); /* Get ADC channels */ if (!is_ab8505(di->parent)) { di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v"); if (IS_ERR(di->adc_main_charger_v)) { ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v), "failed to get ADC main charger voltage\n"); return ret; } di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c"); if (IS_ERR(di->adc_main_charger_c)) { ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c), "failed to get ADC main charger current\n"); return ret; } } di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v"); if (IS_ERR(di->adc_vbus_v)) { ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v), "failed to get ADC USB charger voltage\n"); return ret; } di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c"); if (IS_ERR(di->adc_usb_charger_c)) { ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c), "failed to get ADC USB charger current\n"); return ret; } /* * VDD ADC supply needs to be enabled from this driver when there * is a charger connected to avoid erroneous BTEMP_HIGH/LOW * interrupts during charging */ di->regu = devm_regulator_get(dev, "vddadc"); if (IS_ERR(di->regu)) { ret = PTR_ERR(di->regu); dev_err(dev, "failed to get vddadc regulator\n"); return ret; } /* Request interrupts */ for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); if (irq < 0) return irq; ret = devm_request_threaded_irq(dev, irq, NULL, ab8500_charger_irq[i].isr, IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, ab8500_charger_irq[i].name, di); if (ret != 0) { dev_err(dev, "failed to request %s IRQ %d: %d\n" , ab8500_charger_irq[i].name, irq, ret); return ret; } dev_dbg(dev, "Requested %s IRQ %d: %d\n", ab8500_charger_irq[i].name, irq, ret); } /* initialize lock */ spin_lock_init(&di->usb_state.usb_lock); mutex_init(&di->usb_ipt_crnt_lock); di->autopower = false; di->invalid_charger_detect_state = 0; /* AC and USB supply config */ ac_psy_cfg.fwnode = dev_fwnode(dev); ac_psy_cfg.supplied_to = supply_interface; ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); ac_psy_cfg.drv_data = &di->ac_chg; usb_psy_cfg.fwnode = dev_fwnode(dev); usb_psy_cfg.supplied_to = supply_interface; usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); usb_psy_cfg.drv_data = &di->usb_chg; /* AC supply */ /* ux500_charger sub-class */ di->ac_chg.ops.enable = &ab8500_charger_ac_en; di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable; di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; di->ac_chg.max_out_volt_uv = ab8500_charger_voltage_map[ ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; di->ac_chg.max_out_curr_ua = ab8500_charge_output_curr_map[ARRAY_SIZE(ab8500_charge_output_curr_map) - 1]; di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; /* * The AB8505 only supports USB charging. If we are not the * AB8505, register an AC charger. * * TODO: if this should be opt-in, add DT properties for this. */ if (!is_ab8505(di->parent)) di->ac_chg.enabled = true; /* USB supply */ /* ux500_charger sub-class */ di->usb_chg.ops.enable = &ab8500_charger_usb_en; di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable; di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; di->usb_chg.max_out_volt_uv = ab8500_charger_voltage_map[ ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; di->usb_chg.max_out_curr_ua = ab8500_charge_output_curr_map[ARRAY_SIZE(ab8500_charge_output_curr_map) - 1]; di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; di->usb_state.usb_current_ua = -1; mutex_init(&di->charger_attached_mutex); /* Init work for HW failure check */ INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, ab8500_charger_check_hw_failure_work); INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, ab8500_charger_check_usbchargernotok_work); INIT_DELAYED_WORK(&di->ac_charger_attached_work, ab8500_charger_ac_attached_work); INIT_DELAYED_WORK(&di->usb_charger_attached_work, ab8500_charger_usb_attached_work); /* * For ABB revision 1.0 and 1.1 there is a bug in the watchdog * logic. That means we have to continuously 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 */ INIT_DEFERRABLE_WORK(&di->kick_wd_work, ab8500_charger_kick_watchdog_work); INIT_DEFERRABLE_WORK(&di->check_vbat_work, ab8500_charger_check_vbat_work); INIT_DELAYED_WORK(&di->attach_work, ab8500_charger_usb_link_attach_work); INIT_DELAYED_WORK(&di->usb_state_changed_work, ab8500_charger_usb_state_changed_work); INIT_DELAYED_WORK(&di->vbus_drop_end_work, ab8500_charger_vbus_drop_end_work); /* Init work for charger detection */ INIT_WORK(&di->usb_link_status_work, ab8500_charger_usb_link_status_work); INIT_WORK(&di->ac_work, ab8500_charger_ac_work); INIT_WORK(&di->detect_usb_type_work, ab8500_charger_detect_usb_type_work); /* Init work for checking HW status */ INIT_WORK(&di->check_main_thermal_prot_work, ab8500_charger_check_main_thermal_prot_work); INIT_WORK(&di->check_usb_thermal_prot_work, ab8500_charger_check_usb_thermal_prot_work); /* Initialize OVV, and other registers */ ret = ab8500_charger_init_hw_registers(di); if (ret) { dev_err(dev, "failed to initialize ABB registers\n"); return ret; } /* Register AC charger class */ if (di->ac_chg.enabled) { di->ac_chg.psy = devm_power_supply_register(dev, &ab8500_ac_chg_desc, &ac_psy_cfg); if (IS_ERR(di->ac_chg.psy)) { dev_err(dev, "failed to register AC charger\n"); return PTR_ERR(di->ac_chg.psy); } } /* Register USB charger class */ di->usb_chg.psy = devm_power_supply_register(dev, &ab8500_usb_chg_desc, &usb_psy_cfg); if (IS_ERR(di->usb_chg.psy)) { dev_err(dev, "failed to register USB charger\n"); return PTR_ERR(di->usb_chg.psy); } /* * Check what battery we have, since we always have the USB * psy, use that as a handle. */ ret = ab8500_bm_of_probe(di->usb_chg.psy, di->bm); if (ret) return dev_err_probe(dev, ret, "failed to get battery information\n"); /* Identify the connected charger types during startup */ charger_status = ab8500_charger_detect_chargers(di, true); if (charger_status & AC_PW_CONN) { di->ac.charger_connected = 1; di->ac_conn = true; ab8500_power_supply_changed(di, di->ac_chg.psy); sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); } platform_set_drvdata(pdev, di); /* Create something that will match the subdrivers when we bind */ for (i = 0; i < ARRAY_SIZE(ab8500_charger_component_drivers); i++) { struct device_driver *drv = &ab8500_charger_component_drivers[i]->driver; struct device *p = NULL, *d; while ((d = platform_find_device_by_driver(p, drv))) { put_device(p); component_match_add(dev, &match, component_compare_dev, d); p = d; } put_device(p); } if (!match) { dev_err(dev, "no matching components\n"); ret = -ENODEV; goto remove_ab8500_bm; } if (IS_ERR(match)) { dev_err(dev, "could not create component match\n"); ret = PTR_ERR(match); goto remove_ab8500_bm; } di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(di->usb_phy)) { dev_err(dev, "failed to get usb transceiver\n"); ret = -EINVAL; goto remove_ab8500_bm; } di->nb.notifier_call = ab8500_charger_usb_notifier_call; ret = usb_register_notifier(di->usb_phy, &di->nb); if (ret) { dev_err(dev, "failed to register usb notifier\n"); goto put_usb_phy; } ret = component_master_add_with_match(&pdev->dev, &ab8500_charger_comp_ops, match); if (ret) { dev_err(dev, "failed to add component master\n"); goto free_notifier; } return 0; free_notifier: usb_unregister_notifier(di->usb_phy, &di->nb); put_usb_phy: usb_put_phy(di->usb_phy); remove_ab8500_bm: ab8500_bm_of_remove(di->usb_chg.psy, di->bm); return ret; } static void ab8500_charger_remove(struct platform_device *pdev) { struct ab8500_charger *di = platform_get_drvdata(pdev); component_master_del(&pdev->dev, &ab8500_charger_comp_ops); usb_unregister_notifier(di->usb_phy, &di->nb); ab8500_bm_of_remove(di->usb_chg.psy, di->bm); usb_put_phy(di->usb_phy); } static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_char static const struct of_device_id ab8500_charger_match[] = { { .compatible = "stericsson,ab8500-charger", }, { }, }; MODULE_DEVICE_TABLE(of, ab8500_charger_match); static struct platform_driver ab8500_charger_driver = { .probe = ab8500_charger_probe, .remove = ab8500_charger_remove, .driver = { .name = "ab8500-charger", .of_match_table = ab8500_charger_match, .pm = &ab8500_charger_pm_ops, }, }; static int __init ab8500_charger_init(void) { int ret; ret = platform_register_drivers(ab8500_charger_component_drivers, ARRAY_SIZE(ab8500_charger_component_drivers)); if (ret) return ret; ret = platform_driver_register(&ab8500_charger_driver); if (ret) { platform_unregister_drivers(ab8500_charger_component_drivers, ARRAY_SIZE(ab8500_charger_component_drivers)); return ret; } return 0; } static void __exit ab8500_charger_exit(void) { platform_unregister_drivers(ab8500_charger_component_drivers, ARRAY_SIZE(ab8500_charger_component_drivers)); platform_driver_unregister(&ab8500_charger_driver); } module_init(ab8500_charger_init); module_exit(ab8500_charger_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); MODULE_ALIAS("platform:ab8500-charger"); MODULE_DESCRIPTION("AB8500 charger management driver");
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2026-10-10