2794 lines
74 KiB
C
2794 lines
74 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2012
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*
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* Charger driver for AB8500
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*
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* License Terms: GNU General Public License v2
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* Author:
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* Johan Palsson <johan.palsson@stericsson.com>
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* Karl Komierowski <karl.komierowski@stericsson.com>
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* Arun R Murthy <arun.murthy@stericsson.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/completion.h>
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#include <linux/regulator/consumer.h>
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#include <linux/err.h>
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#include <linux/workqueue.h>
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#include <linux/kobject.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500-bm.h>
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#include <linux/mfd/abx500/ab8500-gpadc.h>
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#include <linux/mfd/abx500/ux500_chargalg.h>
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#include <linux/usb/otg.h>
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/* Charger constants */
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#define NO_PW_CONN 0
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#define AC_PW_CONN 1
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#define USB_PW_CONN 2
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#define MAIN_WDOG_ENA 0x01
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#define MAIN_WDOG_KICK 0x02
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#define MAIN_WDOG_DIS 0x00
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#define CHARG_WD_KICK 0x01
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#define MAIN_CH_ENA 0x01
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#define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
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#define USB_CH_ENA 0x01
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#define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
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#define MAIN_CH_DET 0x01
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#define MAIN_CH_CV_ON 0x04
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#define USB_CH_CV_ON 0x08
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#define VBUS_DET_DBNC100 0x02
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#define VBUS_DET_DBNC1 0x01
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#define OTP_ENABLE_WD 0x01
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#define MAIN_CH_INPUT_CURR_SHIFT 4
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#define VBUS_IN_CURR_LIM_SHIFT 4
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#define LED_INDICATOR_PWM_ENA 0x01
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#define LED_INDICATOR_PWM_DIS 0x00
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#define LED_IND_CUR_5MA 0x04
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#define LED_INDICATOR_PWM_DUTY_252_256 0xBF
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/* HW failure constants */
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#define MAIN_CH_TH_PROT 0x02
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#define VBUS_CH_NOK 0x08
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#define USB_CH_TH_PROT 0x02
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#define VBUS_OVV_TH 0x01
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#define MAIN_CH_NOK 0x01
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#define VBUS_DET 0x80
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/* UsbLineStatus register bit masks */
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#define AB8500_USB_LINK_STATUS 0x78
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#define AB8500_STD_HOST_SUSP 0x18
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/* Watchdog timeout constant */
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#define WD_TIMER 0x30 /* 4min */
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#define WD_KICK_INTERVAL (60 * HZ)
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/* Lowest charger voltage is 3.39V -> 0x4E */
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#define LOW_VOLT_REG 0x4E
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/* UsbLineStatus register - usb types */
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enum ab8500_charger_link_status {
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USB_STAT_NOT_CONFIGURED,
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USB_STAT_STD_HOST_NC,
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USB_STAT_STD_HOST_C_NS,
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USB_STAT_STD_HOST_C_S,
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USB_STAT_HOST_CHG_NM,
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USB_STAT_HOST_CHG_HS,
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USB_STAT_HOST_CHG_HS_CHIRP,
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USB_STAT_DEDICATED_CHG,
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USB_STAT_ACA_RID_A,
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USB_STAT_ACA_RID_B,
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USB_STAT_ACA_RID_C_NM,
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USB_STAT_ACA_RID_C_HS,
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USB_STAT_ACA_RID_C_HS_CHIRP,
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USB_STAT_HM_IDGND,
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USB_STAT_RESERVED,
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USB_STAT_NOT_VALID_LINK,
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};
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enum ab8500_usb_state {
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AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
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AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
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AB8500_BM_USB_STATE_CONFIGURED,
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AB8500_BM_USB_STATE_SUSPEND,
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AB8500_BM_USB_STATE_RESUME,
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AB8500_BM_USB_STATE_MAX,
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};
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/* VBUS input current limits supported in AB8500 in mA */
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#define USB_CH_IP_CUR_LVL_0P05 50
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#define USB_CH_IP_CUR_LVL_0P09 98
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#define USB_CH_IP_CUR_LVL_0P19 193
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#define USB_CH_IP_CUR_LVL_0P29 290
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#define USB_CH_IP_CUR_LVL_0P38 380
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#define USB_CH_IP_CUR_LVL_0P45 450
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#define USB_CH_IP_CUR_LVL_0P5 500
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#define USB_CH_IP_CUR_LVL_0P6 600
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#define USB_CH_IP_CUR_LVL_0P7 700
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#define USB_CH_IP_CUR_LVL_0P8 800
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#define USB_CH_IP_CUR_LVL_0P9 900
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#define USB_CH_IP_CUR_LVL_1P0 1000
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#define USB_CH_IP_CUR_LVL_1P1 1100
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#define USB_CH_IP_CUR_LVL_1P3 1300
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#define USB_CH_IP_CUR_LVL_1P4 1400
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#define USB_CH_IP_CUR_LVL_1P5 1500
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#define VBAT_TRESH_IP_CUR_RED 3800
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#define to_ab8500_charger_usb_device_info(x) container_of((x), \
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struct ab8500_charger, usb_chg)
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#define to_ab8500_charger_ac_device_info(x) container_of((x), \
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struct ab8500_charger, ac_chg)
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/**
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* struct ab8500_charger_interrupts - ab8500 interupts
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* @name: name of the interrupt
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* @isr function pointer to the isr
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*/
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struct ab8500_charger_interrupts {
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char *name;
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irqreturn_t (*isr)(int irq, void *data);
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};
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struct ab8500_charger_info {
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int charger_connected;
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int charger_online;
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int charger_voltage;
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int cv_active;
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bool wd_expired;
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};
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struct ab8500_charger_event_flags {
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bool mainextchnotok;
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bool main_thermal_prot;
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bool usb_thermal_prot;
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bool vbus_ovv;
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bool usbchargernotok;
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bool chgwdexp;
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bool vbus_collapse;
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};
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struct ab8500_charger_usb_state {
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bool usb_changed;
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int usb_current;
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enum ab8500_usb_state state;
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spinlock_t usb_lock;
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};
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/**
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* struct ab8500_charger - ab8500 Charger device information
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* @dev: Pointer to the structure device
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* @max_usb_in_curr: Max USB charger input current
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* @vbus_detected: VBUS detected
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* @vbus_detected_start:
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* VBUS detected during startup
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* @ac_conn: This will be true when the AC charger has been plugged
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* @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
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* charger is enabled
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* @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
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* charger is enabled
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* @vbat Battery voltage
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* @old_vbat Previously measured battery voltage
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* @autopower Indicate if we should have automatic pwron after pwrloss
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* @parent: Pointer to the struct ab8500
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* @gpadc: Pointer to the struct gpadc
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* @pdata: Pointer to the abx500_charger platform data
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* @bat: Pointer to the abx500_bm platform data
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* @flags: Structure for information about events triggered
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* @usb_state: Structure for usb stack information
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* @ac_chg: AC charger power supply
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* @usb_chg: USB charger power supply
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* @ac: Structure that holds the AC charger properties
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* @usb: Structure that holds the USB charger properties
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* @regu: Pointer to the struct regulator
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* @charger_wq: Work queue for the IRQs and checking HW state
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* @check_vbat_work Work for checking vbat threshold to adjust vbus current
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* @check_hw_failure_work: Work for checking HW state
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* @check_usbchgnotok_work: Work for checking USB charger not ok status
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* @kick_wd_work: Work for kicking the charger watchdog in case
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* of ABB rev 1.* due to the watchog logic bug
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* @ac_work: Work for checking AC charger connection
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* @detect_usb_type_work: Work for detecting the USB type connected
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* @usb_link_status_work: Work for checking the new USB link status
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* @usb_state_changed_work: Work for checking USB state
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* @check_main_thermal_prot_work:
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* Work for checking Main thermal status
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* @check_usb_thermal_prot_work:
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* Work for checking USB thermal status
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*/
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struct ab8500_charger {
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struct device *dev;
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int max_usb_in_curr;
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bool vbus_detected;
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bool vbus_detected_start;
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bool ac_conn;
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bool vddadc_en_ac;
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bool vddadc_en_usb;
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int vbat;
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int old_vbat;
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bool autopower;
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struct ab8500 *parent;
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struct ab8500_gpadc *gpadc;
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struct abx500_charger_platform_data *pdata;
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struct abx500_bm_data *bat;
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struct ab8500_charger_event_flags flags;
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struct ab8500_charger_usb_state usb_state;
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struct ux500_charger ac_chg;
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struct ux500_charger usb_chg;
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struct ab8500_charger_info ac;
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struct ab8500_charger_info usb;
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struct regulator *regu;
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struct workqueue_struct *charger_wq;
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struct delayed_work check_vbat_work;
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struct delayed_work check_hw_failure_work;
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struct delayed_work check_usbchgnotok_work;
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struct delayed_work kick_wd_work;
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struct work_struct ac_work;
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struct work_struct detect_usb_type_work;
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struct work_struct usb_link_status_work;
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struct work_struct usb_state_changed_work;
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struct work_struct check_main_thermal_prot_work;
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struct work_struct check_usb_thermal_prot_work;
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struct usb_phy *usb_phy;
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struct notifier_block nb;
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};
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/* AC properties */
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static enum power_supply_property ab8500_charger_ac_props[] = {
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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};
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/* USB properties */
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static enum power_supply_property ab8500_charger_usb_props[] = {
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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};
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/**
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* ab8500_power_loss_handling - set how we handle powerloss.
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* @di: pointer to the ab8500_charger structure
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*
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* Magic nummbers are from STE HW department.
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*/
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static void ab8500_power_loss_handling(struct ab8500_charger *di)
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{
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u8 reg;
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int ret;
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dev_dbg(di->dev, "Autopower : %d\n", di->autopower);
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/* read the autopower register */
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ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, ®);
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if (ret) {
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dev_err(di->dev, "%d write failed\n", __LINE__);
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return;
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}
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/* enable the OPT emulation registers */
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ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
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if (ret) {
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dev_err(di->dev, "%d write failed\n", __LINE__);
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return;
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}
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if (di->autopower)
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reg |= 0x8;
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else
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reg &= ~0x8;
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/* write back the changed value to autopower reg */
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ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
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if (ret) {
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dev_err(di->dev, "%d write failed\n", __LINE__);
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return;
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}
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/* disable the set OTP registers again */
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ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
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if (ret) {
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dev_err(di->dev, "%d write failed\n", __LINE__);
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return;
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}
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}
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/**
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* ab8500_power_supply_changed - a wrapper with local extentions for
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* power_supply_changed
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* @di: pointer to the ab8500_charger structure
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* @psy: pointer to power_supply_that have changed.
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*
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*/
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static void ab8500_power_supply_changed(struct ab8500_charger *di,
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struct power_supply *psy)
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{
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if (di->pdata->autopower_cfg) {
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if (!di->usb.charger_connected &&
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!di->ac.charger_connected &&
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di->autopower) {
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di->autopower = false;
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ab8500_power_loss_handling(di);
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} else if (!di->autopower &&
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(di->ac.charger_connected ||
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di->usb.charger_connected)) {
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di->autopower = true;
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ab8500_power_loss_handling(di);
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}
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}
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power_supply_changed(psy);
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}
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static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
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bool connected)
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{
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if (connected != di->usb.charger_connected) {
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dev_dbg(di->dev, "USB connected:%i\n", connected);
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di->usb.charger_connected = connected;
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sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
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}
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}
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/**
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* ab8500_charger_get_ac_voltage() - get ac charger voltage
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* @di: pointer to the ab8500_charger structure
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*
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* Returns ac charger voltage (on success)
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*/
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static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
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{
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int vch;
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/* Only measure voltage if the charger is connected */
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if (di->ac.charger_connected) {
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vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
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if (vch < 0)
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dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
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} else {
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vch = 0;
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}
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return vch;
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}
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/**
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* ab8500_charger_ac_cv() - check if the main charger is in CV mode
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* @di: pointer to the ab8500_charger structure
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*
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* Returns ac charger CV mode (on success) else error code
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*/
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static int ab8500_charger_ac_cv(struct ab8500_charger *di)
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{
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u8 val;
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int ret = 0;
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/* Only check CV mode if the charger is online */
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if (di->ac.charger_online) {
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ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
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AB8500_CH_STATUS1_REG, &val);
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if (ret < 0) {
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dev_err(di->dev, "%s ab8500 read failed\n", __func__);
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return 0;
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}
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if (val & MAIN_CH_CV_ON)
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ret = 1;
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else
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ret = 0;
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}
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return ret;
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}
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/**
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* ab8500_charger_get_vbus_voltage() - get vbus voltage
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* @di: pointer to the ab8500_charger structure
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*
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* This function returns the vbus voltage.
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* Returns vbus voltage (on success)
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*/
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static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
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{
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int vch;
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/* Only measure voltage if the charger is connected */
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if (di->usb.charger_connected) {
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vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
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if (vch < 0)
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dev_err(di->dev, "%s gpadc conv failed\n", __func__);
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} else {
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vch = 0;
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}
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return vch;
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}
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/**
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* ab8500_charger_get_usb_current() - get usb charger current
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* @di: pointer to the ab8500_charger structure
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*
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* This function returns the usb charger current.
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* Returns usb current (on success) and error code on failure
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*/
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static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
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{
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int ich;
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/* Only measure current if the charger is online */
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if (di->usb.charger_online) {
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ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
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if (ich < 0)
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dev_err(di->dev, "%s gpadc conv failed\n", __func__);
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} else {
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ich = 0;
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}
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return ich;
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}
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/**
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* ab8500_charger_get_ac_current() - get ac charger current
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* @di: pointer to the ab8500_charger structure
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*
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* This function returns the ac charger current.
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* Returns ac current (on success) and error code on failure.
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*/
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static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
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{
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int ich;
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/* Only measure current if the charger is online */
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if (di->ac.charger_online) {
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ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
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if (ich < 0)
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dev_err(di->dev, "%s gpadc conv failed\n", __func__);
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} else {
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ich = 0;
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}
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return ich;
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}
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/**
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* ab8500_charger_usb_cv() - check if the usb charger is in CV mode
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* @di: pointer to the ab8500_charger structure
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*
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* 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
|
|
*
|
|
* 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)
|
|
{
|
|
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 */
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
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_CH_IP_CUR_LVL_0P09;
|
|
break;
|
|
case USB_STAT_HOST_CHG_HS_CHIRP:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
|
|
break;
|
|
case USB_STAT_HOST_CHG_HS:
|
|
case USB_STAT_ACA_RID_C_HS:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9;
|
|
break;
|
|
case USB_STAT_ACA_RID_A:
|
|
/*
|
|
* Dedicated charger level minus maximum current accessory
|
|
* can consume (300mA). Closest level is 1100mA
|
|
*/
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1;
|
|
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_CH_IP_CUR_LVL_1P3;
|
|
break;
|
|
case USB_STAT_DEDICATED_CHG:
|
|
case USB_STAT_HOST_CHG_NM:
|
|
case USB_STAT_ACA_RID_C_HS_CHIRP:
|
|
case USB_STAT_ACA_RID_C_NM:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
|
|
break;
|
|
case USB_STAT_RESERVED:
|
|
/*
|
|
* This state is used to indicate that VBUS has dropped below
|
|
* the detection level 4 times in a row. This is due to the
|
|
* charger output current is set to high making the charger
|
|
* voltage collapse. This have to be propagated through to
|
|
* chargalg. This is done using the property
|
|
* POWER_SUPPLY_PROP_CURRENT_AVG = 1
|
|
*/
|
|
di->flags.vbus_collapse = true;
|
|
dev_dbg(di->dev, "USB Type - USB_STAT_RESERVED "
|
|
"VBUS has collapsed\n");
|
|
ret = -1;
|
|
break;
|
|
case USB_STAT_HM_IDGND:
|
|
case USB_STAT_NOT_CONFIGURED:
|
|
case USB_STAT_NOT_VALID_LINK:
|
|
dev_err(di->dev, "USB Type - Charging not allowed\n");
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
|
|
ret = -ENXIO;
|
|
break;
|
|
default:
|
|
dev_err(di->dev, "USB Type - Unknown\n");
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
|
|
ret = -ENXIO;
|
|
break;
|
|
};
|
|
|
|
dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
|
|
link_status, di->max_usb_in_curr);
|
|
|
|
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;
|
|
}
|
|
ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
|
|
AB8500_USB_LINE_STAT_REG, &val);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* get the USB type */
|
|
val = (val & AB8500_USB_LINK_STATUS) >> 3;
|
|
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);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
return ret;
|
|
}
|
|
ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
|
|
AB8500_USB_LINE_STAT_REG, &val);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
return ret;
|
|
}
|
|
/*
|
|
* Until the IT source register is read the UsbLineStatus
|
|
* register is not updated, hence doing the same
|
|
* Revisit this:
|
|
*/
|
|
|
|
/* get the USB type */
|
|
val = (val & AB8500_USB_LINK_STATUS) >> 3;
|
|
if (val)
|
|
break;
|
|
}
|
|
ret = ab8500_charger_max_usb_curr(di,
|
|
(enum ab8500_charger_link_status) val);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This array maps the raw hex value to charger voltage used by the AB8500
|
|
* Values taken from the UM0836
|
|
*/
|
|
static int ab8500_charger_voltage_map[] = {
|
|
3500 ,
|
|
3525 ,
|
|
3550 ,
|
|
3575 ,
|
|
3600 ,
|
|
3625 ,
|
|
3650 ,
|
|
3675 ,
|
|
3700 ,
|
|
3725 ,
|
|
3750 ,
|
|
3775 ,
|
|
3800 ,
|
|
3825 ,
|
|
3850 ,
|
|
3875 ,
|
|
3900 ,
|
|
3925 ,
|
|
3950 ,
|
|
3975 ,
|
|
4000 ,
|
|
4025 ,
|
|
4050 ,
|
|
4060 ,
|
|
4070 ,
|
|
4080 ,
|
|
4090 ,
|
|
4100 ,
|
|
4110 ,
|
|
4120 ,
|
|
4130 ,
|
|
4140 ,
|
|
4150 ,
|
|
4160 ,
|
|
4170 ,
|
|
4180 ,
|
|
4190 ,
|
|
4200 ,
|
|
4210 ,
|
|
4220 ,
|
|
4230 ,
|
|
4240 ,
|
|
4250 ,
|
|
4260 ,
|
|
4270 ,
|
|
4280 ,
|
|
4290 ,
|
|
4300 ,
|
|
4310 ,
|
|
4320 ,
|
|
4330 ,
|
|
4340 ,
|
|
4350 ,
|
|
4360 ,
|
|
4370 ,
|
|
4380 ,
|
|
4390 ,
|
|
4400 ,
|
|
4410 ,
|
|
4420 ,
|
|
4430 ,
|
|
4440 ,
|
|
4450 ,
|
|
4460 ,
|
|
4470 ,
|
|
4480 ,
|
|
4490 ,
|
|
4500 ,
|
|
4510 ,
|
|
4520 ,
|
|
4530 ,
|
|
4540 ,
|
|
4550 ,
|
|
4560 ,
|
|
4570 ,
|
|
4580 ,
|
|
4590 ,
|
|
4600 ,
|
|
};
|
|
|
|
/*
|
|
* This array maps the raw hex value to charger current used by the AB8500
|
|
* Values taken from the UM0836
|
|
*/
|
|
static int ab8500_charger_current_map[] = {
|
|
100 ,
|
|
200 ,
|
|
300 ,
|
|
400 ,
|
|
500 ,
|
|
600 ,
|
|
700 ,
|
|
800 ,
|
|
900 ,
|
|
1000 ,
|
|
1100 ,
|
|
1200 ,
|
|
1300 ,
|
|
1400 ,
|
|
1500 ,
|
|
};
|
|
|
|
/*
|
|
* This array maps the raw hex value to VBUS input current used by the AB8500
|
|
* Values taken from the UM0836
|
|
*/
|
|
static int ab8500_charger_vbus_in_curr_map[] = {
|
|
USB_CH_IP_CUR_LVL_0P05,
|
|
USB_CH_IP_CUR_LVL_0P09,
|
|
USB_CH_IP_CUR_LVL_0P19,
|
|
USB_CH_IP_CUR_LVL_0P29,
|
|
USB_CH_IP_CUR_LVL_0P38,
|
|
USB_CH_IP_CUR_LVL_0P45,
|
|
USB_CH_IP_CUR_LVL_0P5,
|
|
USB_CH_IP_CUR_LVL_0P6,
|
|
USB_CH_IP_CUR_LVL_0P7,
|
|
USB_CH_IP_CUR_LVL_0P8,
|
|
USB_CH_IP_CUR_LVL_0P9,
|
|
USB_CH_IP_CUR_LVL_1P0,
|
|
USB_CH_IP_CUR_LVL_1P1,
|
|
USB_CH_IP_CUR_LVL_1P3,
|
|
USB_CH_IP_CUR_LVL_1P4,
|
|
USB_CH_IP_CUR_LVL_1P5,
|
|
};
|
|
|
|
static int ab8500_voltage_to_regval(int voltage)
|
|
{
|
|
int i;
|
|
|
|
/* Special case for voltage below 3.5V */
|
|
if (voltage < ab8500_charger_voltage_map[0])
|
|
return LOW_VOLT_REG;
|
|
|
|
for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
|
|
if (voltage < ab8500_charger_voltage_map[i])
|
|
return i - 1;
|
|
}
|
|
|
|
/* If not last element, return error */
|
|
i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
|
|
if (voltage == ab8500_charger_voltage_map[i])
|
|
return i;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
static int ab8500_current_to_regval(int curr)
|
|
{
|
|
int i;
|
|
|
|
if (curr < ab8500_charger_current_map[0])
|
|
return 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) {
|
|
if (curr < ab8500_charger_current_map[i])
|
|
return i - 1;
|
|
}
|
|
|
|
/* If not last element, return error */
|
|
i = ARRAY_SIZE(ab8500_charger_current_map) - 1;
|
|
if (curr == ab8500_charger_current_map[i])
|
|
return i;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
static int ab8500_vbus_in_curr_to_regval(int curr)
|
|
{
|
|
int i;
|
|
|
|
if (curr < ab8500_charger_vbus_in_curr_map[0])
|
|
return 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) {
|
|
if (curr < ab8500_charger_vbus_in_curr_map[i])
|
|
return i - 1;
|
|
}
|
|
|
|
/* If not last element, return error */
|
|
i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1;
|
|
if (curr == ab8500_charger_vbus_in_curr_map[i])
|
|
return i;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_get_usb_cur() - get usb current
|
|
* @di: pointer to the ab8500_charger structre
|
|
*
|
|
* The usb stack provides the maximum current that can be drawn from
|
|
* the standard usb host. This will be in mA.
|
|
* This function converts current in mA to a value that can be written
|
|
* to the register. Returns -1 if charging is not allowed
|
|
*/
|
|
static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
|
|
{
|
|
switch (di->usb_state.usb_current) {
|
|
case 100:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
|
|
break;
|
|
case 200:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19;
|
|
break;
|
|
case 300:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29;
|
|
break;
|
|
case 400:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38;
|
|
break;
|
|
case 500:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
|
|
break;
|
|
default:
|
|
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
|
|
return -1;
|
|
break;
|
|
};
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
|
|
* @di: pointer to the ab8500_charger structure
|
|
* @ich_in: charger input current limit
|
|
*
|
|
* Sets the current that can be drawn from the USB host
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
|
|
int ich_in)
|
|
{
|
|
int ret;
|
|
int input_curr_index;
|
|
int min_value;
|
|
|
|
/* We should always use to lowest current limit */
|
|
min_value = min(di->bat->chg_params->usb_curr_max, ich_in);
|
|
|
|
switch (min_value) {
|
|
case 100:
|
|
if (di->vbat < VBAT_TRESH_IP_CUR_RED)
|
|
min_value = USB_CH_IP_CUR_LVL_0P05;
|
|
break;
|
|
case 500:
|
|
if (di->vbat < VBAT_TRESH_IP_CUR_RED)
|
|
min_value = USB_CH_IP_CUR_LVL_0P45;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
input_curr_index = ab8500_vbus_in_curr_to_regval(min_value);
|
|
if (input_curr_index < 0) {
|
|
dev_err(di->dev, "VBUS input current limit too high\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_USBCH_IPT_CRNTLVL_REG,
|
|
input_curr_index << VBUS_IN_CURR_LIM_SHIFT);
|
|
if (ret)
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_led_en() - turn on/off chargign led
|
|
* @di: pointer to the ab8500_charger structure
|
|
* @on: flag to turn on/off the chargign led
|
|
*
|
|
* Power ON/OFF charging LED indication
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
|
|
{
|
|
int ret;
|
|
|
|
if (on) {
|
|
/* Power ON charging LED indicator, set LED current to 5mA */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_LED_INDICATOR_PWM_CTRL,
|
|
(LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
|
|
if (ret) {
|
|
dev_err(di->dev, "Power ON LED failed\n");
|
|
return ret;
|
|
}
|
|
/* LED indicator PWM duty cycle 252/256 */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_LED_INDICATOR_PWM_DUTY,
|
|
LED_INDICATOR_PWM_DUTY_252_256);
|
|
if (ret) {
|
|
dev_err(di->dev, "Set LED PWM duty cycle failed\n");
|
|
return ret;
|
|
}
|
|
} else {
|
|
/* Power off charging LED indicator */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_LED_INDICATOR_PWM_CTRL,
|
|
LED_INDICATOR_PWM_DIS);
|
|
if (ret) {
|
|
dev_err(di->dev, "Power-off LED failed\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_ac_en() - enable or disable ac charging
|
|
* @di: pointer to the ab8500_charger structure
|
|
* @enable: enable/disable flag
|
|
* @vset: charging voltage
|
|
* @iset: charging current
|
|
*
|
|
* Enable/Disable AC/Mains charging and turns on/off the charging led
|
|
* respectively.
|
|
**/
|
|
static int ab8500_charger_ac_en(struct ux500_charger *charger,
|
|
int enable, int vset, int iset)
|
|
{
|
|
int ret;
|
|
int volt_index;
|
|
int curr_index;
|
|
int input_curr_index;
|
|
u8 overshoot = 0;
|
|
|
|
struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
|
|
|
|
if (enable) {
|
|
/* Check if AC is connected */
|
|
if (!di->ac.charger_connected) {
|
|
dev_err(di->dev, "AC charger not connected\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* Enable AC charging */
|
|
dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
|
|
|
|
/*
|
|
* Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
|
|
* will be triggered everytime we enable the VDD ADC supply.
|
|
* This will turn off charging for a short while.
|
|
* It can be avoided by having the supply on when
|
|
* there is a charger enabled. Normally the VDD ADC supply
|
|
* is enabled everytime a GPADC conversion is triggered. We will
|
|
* force it to be enabled from this driver to have
|
|
* the GPADC module independant of the AB8500 chargers
|
|
*/
|
|
if (!di->vddadc_en_ac) {
|
|
regulator_enable(di->regu);
|
|
di->vddadc_en_ac = true;
|
|
}
|
|
|
|
/* Check if the requested voltage or current is valid */
|
|
volt_index = ab8500_voltage_to_regval(vset);
|
|
curr_index = ab8500_current_to_regval(iset);
|
|
input_curr_index = ab8500_current_to_regval(
|
|
di->bat->chg_params->ac_curr_max);
|
|
if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
|
|
dev_err(di->dev,
|
|
"Charger voltage or current too high, "
|
|
"charging not started\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* ChVoltLevel: maximum battery charging voltage */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
/* MainChInputCurr: current that can be drawn from the charger*/
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_MCH_IPT_CURLVL_REG,
|
|
input_curr_index << MAIN_CH_INPUT_CURR_SHIFT);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
/* ChOutputCurentLevel: protected output current */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* Check if VBAT overshoot control should be enabled */
|
|
if (!di->bat->enable_overshoot)
|
|
overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
|
|
|
|
/* Enable Main Charger */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* Power on charging LED indication */
|
|
ret = ab8500_charger_led_en(di, true);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "failed to enable LED\n");
|
|
|
|
di->ac.charger_online = 1;
|
|
} else {
|
|
/* Disable AC charging */
|
|
if (is_ab8500_1p1_or_earlier(di->parent)) {
|
|
/*
|
|
* For ABB revision 1.0 and 1.1 there is a bug in the
|
|
* watchdog logic. That means we have to continously
|
|
* kick the charger watchdog even when no charger is
|
|
* connected. This is only valid once the AC charger
|
|
* has been enabled. This is a bug that is not handled
|
|
* by the algorithm and the watchdog have to be kicked
|
|
* by the charger driver when the AC charger
|
|
* is disabled
|
|
*/
|
|
if (di->ac_conn) {
|
|
queue_delayed_work(di->charger_wq,
|
|
&di->kick_wd_work,
|
|
round_jiffies(WD_KICK_INTERVAL));
|
|
}
|
|
|
|
/*
|
|
* We can't turn off charging completely
|
|
* due to a bug in AB8500 cut1.
|
|
* If we do, charging will not start again.
|
|
* That is why we set the lowest voltage
|
|
* and current possible
|
|
*/
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_CHARGER,
|
|
AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
|
|
if (ret) {
|
|
dev_err(di->dev,
|
|
"%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_CHARGER,
|
|
AB8500_CH_OPT_CRNTLVL_REG, CH_OP_CUR_LVL_0P1);
|
|
if (ret) {
|
|
dev_err(di->dev,
|
|
"%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
} else {
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_CHARGER,
|
|
AB8500_MCH_CTRL1, 0);
|
|
if (ret) {
|
|
dev_err(di->dev,
|
|
"%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = ab8500_charger_led_en(di, false);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "failed to disable LED\n");
|
|
|
|
di->ac.charger_online = 0;
|
|
di->ac.wd_expired = false;
|
|
|
|
/* Disable regulator if enabled */
|
|
if (di->vddadc_en_ac) {
|
|
regulator_disable(di->regu);
|
|
di->vddadc_en_ac = false;
|
|
}
|
|
|
|
dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
|
|
}
|
|
ab8500_power_supply_changed(di, &di->ac_chg.psy);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_usb_en() - enable usb charging
|
|
* @di: pointer to the ab8500_charger structure
|
|
* @enable: enable/disable flag
|
|
* @vset: charging voltage
|
|
* @ich_out: charger output current
|
|
*
|
|
* Enable/Disable USB charging and turns on/off the charging led respectively.
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_charger_usb_en(struct ux500_charger *charger,
|
|
int enable, int vset, int ich_out)
|
|
{
|
|
int ret;
|
|
int volt_index;
|
|
int curr_index;
|
|
u8 overshoot = 0;
|
|
|
|
struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
|
|
|
|
if (enable) {
|
|
/* Check if USB is connected */
|
|
if (!di->usb.charger_connected) {
|
|
dev_err(di->dev, "USB charger not connected\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
|
|
* will be triggered everytime we enable the VDD ADC supply.
|
|
* This will turn off charging for a short while.
|
|
* It can be avoided by having the supply on when
|
|
* there is a charger enabled. Normally the VDD ADC supply
|
|
* is enabled everytime a GPADC conversion is triggered. We will
|
|
* force it to be enabled from this driver to have
|
|
* the GPADC module independant of the AB8500 chargers
|
|
*/
|
|
if (!di->vddadc_en_usb) {
|
|
regulator_enable(di->regu);
|
|
di->vddadc_en_usb = true;
|
|
}
|
|
|
|
/* Enable USB charging */
|
|
dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
|
|
|
|
/* Check if the requested voltage or current is valid */
|
|
volt_index = ab8500_voltage_to_regval(vset);
|
|
curr_index = ab8500_current_to_regval(ich_out);
|
|
if (volt_index < 0 || curr_index < 0) {
|
|
dev_err(di->dev,
|
|
"Charger voltage or current too high, "
|
|
"charging not started\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* ChVoltLevel: max voltage upto which battery can be charged */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
/* USBChInputCurr: current that can be drawn from the usb */
|
|
ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
|
|
if (ret) {
|
|
dev_err(di->dev, "setting USBChInputCurr failed\n");
|
|
return ret;
|
|
}
|
|
/* ChOutputCurentLevel: protected output current */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
/* Check if VBAT overshoot control should be enabled */
|
|
if (!di->bat->enable_overshoot)
|
|
overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
|
|
|
|
/* Enable USB Charger */
|
|
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");
|
|
|
|
queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
|
|
|
|
di->usb.charger_online = 1;
|
|
} else {
|
|
/* Disable USB charging */
|
|
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");
|
|
|
|
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 */
|
|
if (delayed_work_pending(&di->check_vbat_work))
|
|
cancel_delayed_work(&di->check_vbat_work);
|
|
|
|
}
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
|
|
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.type == POWER_SUPPLY_TYPE_MAINS)
|
|
di = to_ab8500_charger_ac_device_info(charger);
|
|
else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
|
|
di = to_ab8500_charger_usb_device_info(charger);
|
|
else
|
|
return -ENXIO;
|
|
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
|
|
if (ret)
|
|
dev_err(di->dev, "Failed to kick WD!\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_update_charger_current() - update charger current
|
|
* @di: pointer to the ab8500_charger structure
|
|
*
|
|
* Update the charger output current for the specified charger
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
|
|
int ich_out)
|
|
{
|
|
int ret;
|
|
int curr_index;
|
|
struct ab8500_charger *di;
|
|
|
|
if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
|
|
di = to_ab8500_charger_ac_device_info(charger);
|
|
else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
|
|
di = to_ab8500_charger_usb_device_info(charger);
|
|
else
|
|
return -ENXIO;
|
|
|
|
curr_index = ab8500_current_to_regval(ich_out);
|
|
if (curr_index < 0) {
|
|
dev_err(di->dev,
|
|
"Charger current too high, "
|
|
"charging not started\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\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,
|
|
0x1);
|
|
if (ret) {
|
|
dev_err(di->dev, "%s write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
|
|
{
|
|
struct power_supply *psy;
|
|
struct power_supply *ext;
|
|
struct ab8500_charger *di;
|
|
union power_supply_propval ret;
|
|
int i, j;
|
|
bool psy_found = false;
|
|
struct ux500_charger *usb_chg;
|
|
|
|
usb_chg = (struct ux500_charger *)data;
|
|
psy = &usb_chg->psy;
|
|
|
|
di = to_ab8500_charger_usb_device_info(usb_chg);
|
|
|
|
ext = dev_get_drvdata(dev);
|
|
|
|
/* For all psy where the driver name appears in any supplied_to */
|
|
for (i = 0; i < ext->num_supplicants; i++) {
|
|
if (!strcmp(ext->supplied_to[i], psy->name))
|
|
psy_found = true;
|
|
}
|
|
|
|
if (!psy_found)
|
|
return 0;
|
|
|
|
/* Go through all properties for the psy */
|
|
for (j = 0; j < ext->num_properties; j++) {
|
|
enum power_supply_property prop;
|
|
prop = ext->properties[j];
|
|
|
|
if (ext->get_property(ext, prop, &ret))
|
|
continue;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_BATTERY:
|
|
di->vbat = ret.intval / 1000;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_check_vbat_work() - keep vbus current within spec
|
|
* @work pointer to the work_struct structure
|
|
*
|
|
* Due to a asic bug it is necessary to lower the input current to the vbus
|
|
* charger when charging with at some specific levels. This issue is only valid
|
|
* for below a certain battery voltage. This function makes sure that the
|
|
* the allowed current limit isn't exceeded.
|
|
*/
|
|
static void ab8500_charger_check_vbat_work(struct work_struct *work)
|
|
{
|
|
int t = 10;
|
|
struct ab8500_charger *di = container_of(work,
|
|
struct ab8500_charger, check_vbat_work.work);
|
|
|
|
class_for_each_device(power_supply_class, NULL,
|
|
&di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
|
|
|
|
/* First run old_vbat is 0. */
|
|
if (di->old_vbat == 0)
|
|
di->old_vbat = di->vbat;
|
|
|
|
if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
|
|
di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
|
|
(di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
|
|
di->vbat > VBAT_TRESH_IP_CUR_RED))) {
|
|
|
|
dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
|
|
" old: %d\n", di->max_usb_in_curr, di->vbat,
|
|
di->old_vbat);
|
|
ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
|
|
power_supply_changed(&di->usb_chg.psy);
|
|
}
|
|
|
|
di->old_vbat = di->vbat;
|
|
|
|
/*
|
|
* No need to check the battery voltage every second when not close to
|
|
* the threshold.
|
|
*/
|
|
if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
|
|
(di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
|
|
t = 1;
|
|
|
|
queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_check_hw_failure_work() - check main charger failure
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for checking the main charger status
|
|
*/
|
|
static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
u8 reg_value;
|
|
|
|
struct ab8500_charger *di = container_of(work,
|
|
struct ab8500_charger, check_hw_failure_work.work);
|
|
|
|
/* Check if the status bits for HW failure is still active */
|
|
if (di->flags.mainextchnotok) {
|
|
ret = abx500_get_register_interruptible(di->dev,
|
|
AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
return;
|
|
}
|
|
if (!(reg_value & MAIN_CH_NOK)) {
|
|
di->flags.mainextchnotok = false;
|
|
ab8500_power_supply_changed(di, &di->ac_chg.psy);
|
|
}
|
|
}
|
|
if (di->flags.vbus_ovv) {
|
|
ret = abx500_get_register_interruptible(di->dev,
|
|
AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
|
|
®_value);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
return;
|
|
}
|
|
if (!(reg_value & VBUS_OVV_TH)) {
|
|
di->flags.vbus_ovv = false;
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
}
|
|
}
|
|
/* If we still have a failure, schedule a new check */
|
|
if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
|
|
queue_delayed_work(di->charger_wq,
|
|
&di->check_hw_failure_work, round_jiffies(HZ));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_kick_watchdog_work() - kick the watchdog
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for kicking the charger watchdog.
|
|
*
|
|
* For ABB revision 1.0 and 1.1 there is a bug in the watchdog
|
|
* logic. That means we have to continously kick the charger
|
|
* watchdog even when no charger is connected. This is only
|
|
* valid once the AC charger has been enabled. This is
|
|
* a bug that is not handled by the algorithm and the
|
|
* watchdog have to be kicked by the charger driver
|
|
* when the AC charger is disabled
|
|
*/
|
|
static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
|
|
struct ab8500_charger *di = container_of(work,
|
|
struct ab8500_charger, kick_wd_work.work);
|
|
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
|
|
if (ret)
|
|
dev_err(di->dev, "Failed to kick WD!\n");
|
|
|
|
/* Schedule a new watchdog kick */
|
|
queue_delayed_work(di->charger_wq,
|
|
&di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_ac_work() - work to get and set main charger status
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work queue function for checking the main charger status
|
|
*/
|
|
static void ab8500_charger_ac_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
|
|
struct ab8500_charger *di = container_of(work,
|
|
struct ab8500_charger, ac_work);
|
|
|
|
/*
|
|
* Since we can't be sure that the events are received
|
|
* synchronously, we have the check if the main charger is
|
|
* connected by reading the status register
|
|
*/
|
|
ret = ab8500_charger_detect_chargers(di);
|
|
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");
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
if (ret < 0)
|
|
return;
|
|
|
|
if (!(ret & USB_PW_CONN)) {
|
|
di->vbus_detected = 0;
|
|
ab8500_charger_set_usb_connected(di, false);
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
} else {
|
|
di->vbus_detected = 1;
|
|
|
|
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_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 ret;
|
|
|
|
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
|
|
*/
|
|
ret = ab8500_charger_detect_chargers(di);
|
|
if (ret < 0)
|
|
return;
|
|
|
|
if (!(ret & USB_PW_CONN)) {
|
|
di->vbus_detected = 0;
|
|
ab8500_charger_set_usb_connected(di, false);
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
} else {
|
|
di->vbus_detected = 1;
|
|
ret = ab8500_charger_read_usb_type(di);
|
|
if (!ret) {
|
|
/* Update maximum input current */
|
|
ret = ab8500_charger_set_vbus_in_curr(di,
|
|
di->max_usb_in_curr);
|
|
if (ret)
|
|
return;
|
|
|
|
ab8500_charger_set_usb_connected(di, true);
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
} else if (ret == -ENXIO) {
|
|
/* No valid charger type detected */
|
|
ab8500_charger_set_usb_connected(di, false);
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
if (!di->vbus_detected)
|
|
return;
|
|
|
|
spin_lock_irqsave(&di->usb_state.usb_lock, flags);
|
|
di->usb_state.usb_changed = false;
|
|
spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
|
|
|
|
/*
|
|
* wait for some time until you get updates from the usb stack
|
|
* and negotiations are completed
|
|
*/
|
|
msleep(250);
|
|
|
|
if (di->usb_state.usb_changed)
|
|
return;
|
|
|
|
dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
|
|
__func__, di->usb_state.state, di->usb_state.usb_current);
|
|
|
|
switch (di->usb_state.state) {
|
|
case AB8500_BM_USB_STATE_RESET_HS:
|
|
case AB8500_BM_USB_STATE_RESET_FS:
|
|
case AB8500_BM_USB_STATE_SUSPEND:
|
|
case AB8500_BM_USB_STATE_MAX:
|
|
ab8500_charger_set_usb_connected(di, false);
|
|
ab8500_power_supply_changed(di, &di->usb_chg.psy);
|
|
break;
|
|
|
|
case AB8500_BM_USB_STATE_RESUME:
|
|
/*
|
|
* when suspend->resume there should be delay
|
|
* of 1sec for enabling charging
|
|
*/
|
|
msleep(1000);
|
|
/* Intentional fall through */
|
|
case AB8500_BM_USB_STATE_CONFIGURED:
|
|
/*
|
|
* USB is configured, enable charging with the charging
|
|
* input current obtained from USB driver
|
|
*/
|
|
if (!ab8500_charger_get_usb_cur(di)) {
|
|
/* Update maximum input current */
|
|
ret = ab8500_charger_set_vbus_in_curr(di,
|
|
di->max_usb_in_curr);
|
|
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);
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
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_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;
|
|
|
|
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:
|
|
di->ac.charger_voltage = ab8500_charger_get_ac_voltage(di);
|
|
val->intval = di->ac.charger_voltage * 1000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
/*
|
|
* This property is used to indicate when CV mode is entered
|
|
* for the AC charger
|
|
*/
|
|
di->ac.cv_active = ab8500_charger_ac_cv(di);
|
|
val->intval = di->ac.cv_active;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
val->intval = ab8500_charger_get_ac_current(di) * 1000;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_usb_get_property() - get the usb properties
|
|
* @psy: pointer to the power_supply structure
|
|
* @psp: pointer to the power_supply_property structure
|
|
* @val: pointer to the power_supply_propval union
|
|
*
|
|
* This function gets called when an application tries to get the usb
|
|
* properties by reading the sysfs files.
|
|
* USB properties are online, present and voltage.
|
|
* online: usb charging is in progress or not
|
|
* present: presence of the usb
|
|
* voltage: vbus voltage
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_charger_usb_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct ab8500_charger *di;
|
|
|
|
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:
|
|
di->usb.charger_voltage = ab8500_charger_get_vbus_voltage(di);
|
|
val->intval = di->usb.charger_voltage * 1000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
/*
|
|
* This property is used to indicate when CV mode is entered
|
|
* for the USB charger
|
|
*/
|
|
di->usb.cv_active = ab8500_charger_usb_cv(di);
|
|
val->intval = di->usb.cv_active;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
val->intval = ab8500_charger_get_usb_current(di) * 1000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_AVG:
|
|
/*
|
|
* This property is used to indicate when VBUS has collapsed
|
|
* due to too high output current from the USB charger
|
|
*/
|
|
if (di->flags.vbus_collapse)
|
|
val->intval = 1;
|
|
else
|
|
val->intval = 0;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_charger_init_hw_registers() - Set up charger related registers
|
|
* @di: pointer to the ab8500_charger structure
|
|
*
|
|
* Set up charger OVV, watchdog and maximum voltage registers as well as
|
|
* charging of the backup battery
|
|
*/
|
|
static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
|
|
{
|
|
int ret = 0;
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/* VBUS OVV set to 6.3V and enable automatic current limitiation */
|
|
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 VBUS OVV\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Enable main watchdog in OTP */
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to enable main WD in OTP\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Enable main watchdog */
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_SYS_CTRL2_BLOCK,
|
|
AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
|
|
if (ret) {
|
|
dev_err(di->dev, "faile to enable main watchdog\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Due to internal synchronisation, Enable and Kick watchdog bits
|
|
* cannot be enabled in a single write.
|
|
* A minimum delay of 2*32 kHz period (62.5µs) must be inserted
|
|
* between writing Enable then Kick bits.
|
|
*/
|
|
udelay(63);
|
|
|
|
/* Kick main watchdog */
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_SYS_CTRL2_BLOCK,
|
|
AB8500_MAIN_WDOG_CTRL_REG,
|
|
(MAIN_WDOG_ENA | MAIN_WDOG_KICK));
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to kick main watchdog\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Disable main watchdog */
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_SYS_CTRL2_BLOCK,
|
|
AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to disable main watchdog\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Set watchdog timeout */
|
|
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_CH_WD_TIMER_REG, WD_TIMER);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to set charger watchdog timeout\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Backup battery voltage and current */
|
|
ret = abx500_set_register_interruptible(di->dev,
|
|
AB8500_RTC,
|
|
AB8500_RTC_BACKUP_CHG_REG,
|
|
di->bat->bkup_bat_v |
|
|
di->bat->bkup_bat_i);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to setup backup battery charging\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Enable backup battery charging */
|
|
abx500_mask_and_set_register_interruptible(di->dev,
|
|
AB8500_RTC, AB8500_RTC_CTRL_REG,
|
|
RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
|
|
if (ret < 0)
|
|
dev_err(di->dev, "%s mask and set failed\n", __func__);
|
|
|
|
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},
|
|
};
|
|
|
|
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;
|
|
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 == 2) && (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.usb_changed = true;
|
|
spin_unlock(&di->usb_state.usb_lock);
|
|
|
|
di->usb_state.state = bm_usb_state;
|
|
di->usb_state.usb_current = mA;
|
|
|
|
queue_work(di->charger_wq, &di->usb_state_changed_work);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
#if defined(CONFIG_PM)
|
|
static int ab8500_charger_resume(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct ab8500_charger *di = platform_get_drvdata(pdev);
|
|
|
|
/*
|
|
* For ABB revision 1.0 and 1.1 there is a bug in the watchdog
|
|
* logic. That means we have to continously kick the charger
|
|
* watchdog even when no charger is connected. This is only
|
|
* valid once the AC charger has been enabled. This is
|
|
* a bug that is not handled by the algorithm and the
|
|
* watchdog have to be kicked by the charger driver
|
|
* when the AC charger is disabled
|
|
*/
|
|
if (di->ac_conn && 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 */
|
|
if (!delayed_work_pending(
|
|
&di->kick_wd_work)) {
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ab8500_charger_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct ab8500_charger *di = platform_get_drvdata(pdev);
|
|
|
|
/* Cancel any pending HW failure check */
|
|
if (delayed_work_pending(&di->check_hw_failure_work))
|
|
cancel_delayed_work(&di->check_hw_failure_work);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define ab8500_charger_suspend NULL
|
|
#define ab8500_charger_resume NULL
|
|
#endif
|
|
|
|
static int __devexit ab8500_charger_remove(struct platform_device *pdev)
|
|
{
|
|
struct ab8500_charger *di = platform_get_drvdata(pdev);
|
|
int i, irq, 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);
|
|
|
|
/* Disable interrupts */
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
|
|
free_irq(irq, di);
|
|
}
|
|
|
|
/* disable the regulator */
|
|
regulator_put(di->regu);
|
|
|
|
/* 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__);
|
|
|
|
usb_unregister_notifier(di->usb_phy, &di->nb);
|
|
usb_put_phy(di->usb_phy);
|
|
|
|
/* Delete the work queue */
|
|
destroy_workqueue(di->charger_wq);
|
|
|
|
flush_scheduled_work();
|
|
power_supply_unregister(&di->usb_chg.psy);
|
|
power_supply_unregister(&di->ac_chg.psy);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(di);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit ab8500_charger_probe(struct platform_device *pdev)
|
|
{
|
|
int irq, i, charger_status, ret = 0;
|
|
struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data;
|
|
struct ab8500_charger *di;
|
|
|
|
if (!plat_data) {
|
|
dev_err(&pdev->dev, "No platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
di = kzalloc(sizeof(*di), GFP_KERNEL);
|
|
if (!di)
|
|
return -ENOMEM;
|
|
|
|
/* get parent data */
|
|
di->dev = &pdev->dev;
|
|
di->parent = dev_get_drvdata(pdev->dev.parent);
|
|
di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
|
|
|
|
/* initialize lock */
|
|
spin_lock_init(&di->usb_state.usb_lock);
|
|
|
|
/* get charger specific platform data */
|
|
di->pdata = plat_data->charger;
|
|
if (!di->pdata) {
|
|
dev_err(di->dev, "no charger platform data supplied\n");
|
|
ret = -EINVAL;
|
|
goto free_device_info;
|
|
}
|
|
|
|
/* get battery specific platform data */
|
|
di->bat = plat_data->battery;
|
|
if (!di->bat) {
|
|
dev_err(di->dev, "no battery platform data supplied\n");
|
|
ret = -EINVAL;
|
|
goto free_device_info;
|
|
}
|
|
|
|
di->autopower = false;
|
|
|
|
/* AC supply */
|
|
/* power_supply base class */
|
|
di->ac_chg.psy.name = "ab8500_ac";
|
|
di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
|
|
di->ac_chg.psy.properties = ab8500_charger_ac_props;
|
|
di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
|
|
di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
|
|
di->ac_chg.psy.supplied_to = di->pdata->supplied_to;
|
|
di->ac_chg.psy.num_supplicants = di->pdata->num_supplicants;
|
|
/* ux500_charger sub-class */
|
|
di->ac_chg.ops.enable = &ab8500_charger_ac_en;
|
|
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 = ab8500_charger_voltage_map[
|
|
ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
|
|
di->ac_chg.max_out_curr = ab8500_charger_current_map[
|
|
ARRAY_SIZE(ab8500_charger_current_map) - 1];
|
|
|
|
/* USB supply */
|
|
/* power_supply base class */
|
|
di->usb_chg.psy.name = "ab8500_usb";
|
|
di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
|
|
di->usb_chg.psy.properties = ab8500_charger_usb_props;
|
|
di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
|
|
di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
|
|
di->usb_chg.psy.supplied_to = di->pdata->supplied_to;
|
|
di->usb_chg.psy.num_supplicants = di->pdata->num_supplicants;
|
|
/* ux500_charger sub-class */
|
|
di->usb_chg.ops.enable = &ab8500_charger_usb_en;
|
|
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 = ab8500_charger_voltage_map[
|
|
ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
|
|
di->usb_chg.max_out_curr = ab8500_charger_current_map[
|
|
ARRAY_SIZE(ab8500_charger_current_map) - 1];
|
|
|
|
|
|
/* Create a work queue for the charger */
|
|
di->charger_wq =
|
|
create_singlethread_workqueue("ab8500_charger_wq");
|
|
if (di->charger_wq == NULL) {
|
|
dev_err(di->dev, "failed to create work queue\n");
|
|
ret = -ENOMEM;
|
|
goto free_device_info;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/*
|
|
* For ABB revision 1.0 and 1.1 there is a bug in the watchdog
|
|
* logic. That means we have to continously kick the charger
|
|
* watchdog even when no charger is connected. This is only
|
|
* valid once the AC charger has been enabled. This is
|
|
* a bug that is not handled by the algorithm and the
|
|
* watchdog have to be kicked by the charger driver
|
|
* when the AC charger is disabled
|
|
*/
|
|
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 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(&di->usb_state_changed_work,
|
|
ab8500_charger_usb_state_changed_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);
|
|
|
|
/*
|
|
* 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 = regulator_get(di->dev, "vddadc");
|
|
if (IS_ERR(di->regu)) {
|
|
ret = PTR_ERR(di->regu);
|
|
dev_err(di->dev, "failed to get vddadc regulator\n");
|
|
goto free_charger_wq;
|
|
}
|
|
|
|
|
|
/* Initialize OVV, and other registers */
|
|
ret = ab8500_charger_init_hw_registers(di);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to initialize ABB registers\n");
|
|
goto free_regulator;
|
|
}
|
|
|
|
/* Register AC charger class */
|
|
ret = power_supply_register(di->dev, &di->ac_chg.psy);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to register AC charger\n");
|
|
goto free_regulator;
|
|
}
|
|
|
|
/* Register USB charger class */
|
|
ret = power_supply_register(di->dev, &di->usb_chg.psy);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to register USB charger\n");
|
|
goto free_ac;
|
|
}
|
|
|
|
di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
|
|
if (IS_ERR_OR_NULL(di->usb_phy)) {
|
|
dev_err(di->dev, "failed to get usb transceiver\n");
|
|
ret = -EINVAL;
|
|
goto free_usb;
|
|
}
|
|
di->nb.notifier_call = ab8500_charger_usb_notifier_call;
|
|
ret = usb_register_notifier(di->usb_phy, &di->nb);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to register usb notifier\n");
|
|
goto put_usb_phy;
|
|
}
|
|
|
|
/* Identify the connected charger types during startup */
|
|
charger_status = ab8500_charger_detect_chargers(di);
|
|
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");
|
|
}
|
|
|
|
if (charger_status & USB_PW_CONN) {
|
|
dev_dbg(di->dev, "VBUS Detect during startup\n");
|
|
di->vbus_detected = true;
|
|
di->vbus_detected_start = true;
|
|
queue_work(di->charger_wq,
|
|
&di->detect_usb_type_work);
|
|
}
|
|
|
|
/* Register interrupts */
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
|
|
ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
|
|
IRQF_SHARED | IRQF_NO_SUSPEND,
|
|
ab8500_charger_irq[i].name, di);
|
|
|
|
if (ret != 0) {
|
|
dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
|
|
, ab8500_charger_irq[i].name, irq, ret);
|
|
goto free_irq;
|
|
}
|
|
dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
|
|
ab8500_charger_irq[i].name, irq, ret);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, di);
|
|
|
|
return ret;
|
|
|
|
free_irq:
|
|
usb_unregister_notifier(di->usb_phy, &di->nb);
|
|
|
|
/* We also have to free all successfully registered irqs */
|
|
for (i = i - 1; i >= 0; i--) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
|
|
free_irq(irq, di);
|
|
}
|
|
put_usb_phy:
|
|
usb_put_phy(di->usb_phy);
|
|
free_usb:
|
|
power_supply_unregister(&di->usb_chg.psy);
|
|
free_ac:
|
|
power_supply_unregister(&di->ac_chg.psy);
|
|
free_regulator:
|
|
regulator_put(di->regu);
|
|
free_charger_wq:
|
|
destroy_workqueue(di->charger_wq);
|
|
free_device_info:
|
|
kfree(di);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver ab8500_charger_driver = {
|
|
.probe = ab8500_charger_probe,
|
|
.remove = __devexit_p(ab8500_charger_remove),
|
|
.suspend = ab8500_charger_suspend,
|
|
.resume = ab8500_charger_resume,
|
|
.driver = {
|
|
.name = "ab8500-charger",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init ab8500_charger_init(void)
|
|
{
|
|
return platform_driver_register(&ab8500_charger_driver);
|
|
}
|
|
|
|
static void __exit ab8500_charger_exit(void)
|
|
{
|
|
platform_driver_unregister(&ab8500_charger_driver);
|
|
}
|
|
|
|
subsys_initcall_sync(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");
|