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linux/drivers/power/ab8500_charger.c
Julia Lawall fc2bc0c29a ab8500_charger: Fix error return code 
Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-08-22 18:47:25 -07:00

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/*
* Copyright (C) ST-Ericsson SA 2012
*
* Charger driver for AB8500
*
* License Terms: GNU General Public License v2
* Author:
* Johan Palsson <johan.palsson@stericsson.com>
* Karl Komierowski <karl.komierowski@stericsson.com>
* Arun R Murthy <arun.murthy@stericsson.com>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/abx500/ab8500-gpadc.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/usb/otg.h>
/* Charger constants */
#define NO_PW_CONN 0
#define AC_PW_CONN 1
#define USB_PW_CONN 2
#define MAIN_WDOG_ENA 0x01
#define MAIN_WDOG_KICK 0x02
#define MAIN_WDOG_DIS 0x00
#define CHARG_WD_KICK 0x01
#define MAIN_CH_ENA 0x01
#define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02
#define USB_CH_ENA 0x01
#define USB_CHG_NO_OVERSHOOT_ENA_N 0x02
#define MAIN_CH_DET 0x01
#define MAIN_CH_CV_ON 0x04
#define USB_CH_CV_ON 0x08
#define VBUS_DET_DBNC100 0x02
#define VBUS_DET_DBNC1 0x01
#define OTP_ENABLE_WD 0x01
#define MAIN_CH_INPUT_CURR_SHIFT 4
#define VBUS_IN_CURR_LIM_SHIFT 4
#define LED_INDICATOR_PWM_ENA 0x01
#define LED_INDICATOR_PWM_DIS 0x00
#define LED_IND_CUR_5MA 0x04
#define LED_INDICATOR_PWM_DUTY_252_256 0xBF
/* HW failure constants */
#define MAIN_CH_TH_PROT 0x02
#define VBUS_CH_NOK 0x08
#define USB_CH_TH_PROT 0x02
#define VBUS_OVV_TH 0x01
#define MAIN_CH_NOK 0x01
#define VBUS_DET 0x80
/* UsbLineStatus register bit masks */
#define AB8500_USB_LINK_STATUS 0x78
#define AB8500_STD_HOST_SUSP 0x18
/* Watchdog timeout constant */
#define WD_TIMER 0x30 /* 4min */
#define WD_KICK_INTERVAL (60 * HZ)
/* Lowest charger voltage is 3.39V -> 0x4E */
#define LOW_VOLT_REG 0x4E
/* UsbLineStatus register - usb types */
enum ab8500_charger_link_status {
USB_STAT_NOT_CONFIGURED,
USB_STAT_STD_HOST_NC,
USB_STAT_STD_HOST_C_NS,
USB_STAT_STD_HOST_C_S,
USB_STAT_HOST_CHG_NM,
USB_STAT_HOST_CHG_HS,
USB_STAT_HOST_CHG_HS_CHIRP,
USB_STAT_DEDICATED_CHG,
USB_STAT_ACA_RID_A,
USB_STAT_ACA_RID_B,
USB_STAT_ACA_RID_C_NM,
USB_STAT_ACA_RID_C_HS,
USB_STAT_ACA_RID_C_HS_CHIRP,
USB_STAT_HM_IDGND,
USB_STAT_RESERVED,
USB_STAT_NOT_VALID_LINK,
};
enum ab8500_usb_state {
AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */
AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */
AB8500_BM_USB_STATE_CONFIGURED,
AB8500_BM_USB_STATE_SUSPEND,
AB8500_BM_USB_STATE_RESUME,
AB8500_BM_USB_STATE_MAX,
};
/* VBUS input current limits supported in AB8500 in mA */
#define USB_CH_IP_CUR_LVL_0P05 50
#define USB_CH_IP_CUR_LVL_0P09 98
#define USB_CH_IP_CUR_LVL_0P19 193
#define USB_CH_IP_CUR_LVL_0P29 290
#define USB_CH_IP_CUR_LVL_0P38 380
#define USB_CH_IP_CUR_LVL_0P45 450
#define USB_CH_IP_CUR_LVL_0P5 500
#define USB_CH_IP_CUR_LVL_0P6 600
#define USB_CH_IP_CUR_LVL_0P7 700
#define USB_CH_IP_CUR_LVL_0P8 800
#define USB_CH_IP_CUR_LVL_0P9 900
#define USB_CH_IP_CUR_LVL_1P0 1000
#define USB_CH_IP_CUR_LVL_1P1 1100
#define USB_CH_IP_CUR_LVL_1P3 1300
#define USB_CH_IP_CUR_LVL_1P4 1400
#define USB_CH_IP_CUR_LVL_1P5 1500
#define VBAT_TRESH_IP_CUR_RED 3800
#define to_ab8500_charger_usb_device_info(x) container_of((x), \
struct ab8500_charger, usb_chg)
#define to_ab8500_charger_ac_device_info(x) container_of((x), \
struct ab8500_charger, ac_chg)
/**
* struct ab8500_charger_interrupts - ab8500 interupts
* @name: name of the interrupt
* @isr function pointer to the isr
*/
struct ab8500_charger_interrupts {
char *name;
irqreturn_t (*isr)(int irq, void *data);
};
struct ab8500_charger_info {
int charger_connected;
int charger_online;
int charger_voltage;
int cv_active;
bool wd_expired;
};
struct ab8500_charger_event_flags {
bool mainextchnotok;
bool main_thermal_prot;
bool usb_thermal_prot;
bool vbus_ovv;
bool usbchargernotok;
bool chgwdexp;
bool vbus_collapse;
};
struct ab8500_charger_usb_state {
bool usb_changed;
int usb_current;
enum ab8500_usb_state state;
spinlock_t usb_lock;
};
/**
* struct ab8500_charger - ab8500 Charger device information
* @dev: Pointer to the structure device
* @max_usb_in_curr: Max USB charger input current
* @vbus_detected: VBUS detected
* @vbus_detected_start:
* VBUS detected during startup
* @ac_conn: This will be true when the AC charger has been plugged
* @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC
* charger is enabled
* @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB
* charger is enabled
* @vbat Battery voltage
* @old_vbat Previously measured battery voltage
* @autopower Indicate if we should have automatic pwron after pwrloss
* @parent: Pointer to the struct ab8500
* @gpadc: Pointer to the struct gpadc
* @pdata: Pointer to the abx500_charger platform data
* @bat: Pointer to the abx500_bm platform data
* @flags: Structure for information about events triggered
* @usb_state: Structure for usb stack information
* @ac_chg: AC charger power supply
* @usb_chg: USB charger power supply
* @ac: Structure that holds the AC charger properties
* @usb: Structure that holds the USB charger properties
* @regu: Pointer to the struct regulator
* @charger_wq: Work queue for the IRQs and checking HW state
* @check_vbat_work Work for checking vbat threshold to adjust vbus current
* @check_hw_failure_work: Work for checking HW state
* @check_usbchgnotok_work: Work for checking USB charger not ok status
* @kick_wd_work: Work for kicking the charger watchdog in case
* of ABB rev 1.* due to the watchog logic bug
* @ac_work: Work for checking AC charger connection
* @detect_usb_type_work: Work for detecting the USB type connected
* @usb_link_status_work: Work for checking the new USB link status
* @usb_state_changed_work: Work for checking USB state
* @check_main_thermal_prot_work:
* Work for checking Main thermal status
* @check_usb_thermal_prot_work:
* Work for checking USB thermal status
*/
struct ab8500_charger {
struct device *dev;
int max_usb_in_curr;
bool vbus_detected;
bool vbus_detected_start;
bool ac_conn;
bool vddadc_en_ac;
bool vddadc_en_usb;
int vbat;
int old_vbat;
bool autopower;
struct ab8500 *parent;
struct ab8500_gpadc *gpadc;
struct abx500_charger_platform_data *pdata;
struct abx500_bm_data *bat;
struct ab8500_charger_event_flags flags;
struct ab8500_charger_usb_state usb_state;
struct ux500_charger ac_chg;
struct ux500_charger usb_chg;
struct ab8500_charger_info ac;
struct ab8500_charger_info usb;
struct regulator *regu;
struct workqueue_struct *charger_wq;
struct delayed_work check_vbat_work;
struct delayed_work check_hw_failure_work;
struct delayed_work check_usbchgnotok_work;
struct delayed_work kick_wd_work;
struct work_struct ac_work;
struct work_struct detect_usb_type_work;
struct work_struct usb_link_status_work;
struct work_struct usb_state_changed_work;
struct work_struct check_main_thermal_prot_work;
struct work_struct check_usb_thermal_prot_work;
struct usb_phy *usb_phy;
struct notifier_block nb;
};
/* AC properties */
static enum power_supply_property ab8500_charger_ac_props[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
/* USB properties */
static enum power_supply_property ab8500_charger_usb_props[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
/**
* ab8500_power_loss_handling - set how we handle powerloss.
* @di: pointer to the ab8500_charger structure
*
* Magic nummbers are from STE HW department.
*/
static void ab8500_power_loss_handling(struct ab8500_charger *di)
{
u8 reg;
int ret;
dev_dbg(di->dev, "Autopower : %d\n", di->autopower);
/* read the autopower register */
ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, &reg);
if (ret) {
dev_err(di->dev, "%d write failed\n", __LINE__);
return;
}
/* enable the OPT emulation registers */
ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
if (ret) {
dev_err(di->dev, "%d write failed\n", __LINE__);
return;
}
if (di->autopower)
reg |= 0x8;
else
reg &= ~0x8;
/* write back the changed value to autopower reg */
ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
if (ret) {
dev_err(di->dev, "%d write failed\n", __LINE__);
return;
}
/* disable the set OTP registers again */
ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
if (ret) {
dev_err(di->dev, "%d write failed\n", __LINE__);
return;
}
}
/**
* ab8500_power_supply_changed - a wrapper with local extentions for
* power_supply_changed
* @di: pointer to the ab8500_charger structure
* @psy: pointer to power_supply_that have changed.
*
*/
static void ab8500_power_supply_changed(struct ab8500_charger *di,
struct power_supply *psy)
{
if (di->pdata->autopower_cfg) {
if (!di->usb.charger_connected &&
!di->ac.charger_connected &&
di->autopower) {
di->autopower = false;
ab8500_power_loss_handling(di);
} else if (!di->autopower &&
(di->ac.charger_connected ||
di->usb.charger_connected)) {
di->autopower = true;
ab8500_power_loss_handling(di);
}
}
power_supply_changed(psy);
}
static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
bool connected)
{
if (connected != di->usb.charger_connected) {
dev_dbg(di->dev, "USB connected:%i\n", connected);
di->usb.charger_connected = connected;
sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
}
}
/**
* ab8500_charger_get_ac_voltage() - get ac charger voltage
* @di: pointer to the ab8500_charger structure
*
* Returns ac charger voltage (on success)
*/
static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
{
int vch;
/* Only measure voltage if the charger is connected */
if (di->ac.charger_connected) {
vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
if (vch < 0)
dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
} else {
vch = 0;
}
return vch;
}
/**
* ab8500_charger_ac_cv() - check if the main charger is in CV mode
* @di: pointer to the ab8500_charger structure
*
* Returns ac charger CV mode (on success) else error code
*/
static int ab8500_charger_ac_cv(struct ab8500_charger *di)
{
u8 val;
int ret = 0;
/* Only check CV mode if the charger is online */
if (di->ac.charger_online) {
ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
AB8500_CH_STATUS1_REG, &val);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return 0;
}
if (val & MAIN_CH_CV_ON)
ret = 1;
else
ret = 0;
}
return ret;
}
/**
* ab8500_charger_get_vbus_voltage() - get vbus voltage
* @di: pointer to the ab8500_charger structure
*
* This function returns the vbus voltage.
* Returns vbus voltage (on success)
*/
static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
{
int vch;
/* Only measure voltage if the charger is connected */
if (di->usb.charger_connected) {
vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
if (vch < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__);
} else {
vch = 0;
}
return vch;
}
/**
* ab8500_charger_get_usb_current() - get usb charger current
* @di: pointer to the ab8500_charger structure
*
* This function returns the usb charger current.
* Returns usb current (on success) and error code on failure
*/
static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
{
int ich;
/* Only measure current if the charger is online */
if (di->usb.charger_online) {
ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
if (ich < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__);
} else {
ich = 0;
}
return ich;
}
/**
* ab8500_charger_get_ac_current() - get ac charger current
* @di: pointer to the ab8500_charger structure
*
* This function returns the ac charger current.
* Returns ac current (on success) and error code on failure.
*/
static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
{
int ich;
/* Only measure current if the charger is online */
if (di->ac.charger_online) {
ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
if (ich < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__);
} else {
ich = 0;
}
return ich;
}
/**
* ab8500_charger_usb_cv() - check if the usb charger is in CV mode
* @di: pointer to the ab8500_charger structure
*
* Returns ac charger CV mode (on success) else error code
*/
static int ab8500_charger_usb_cv(struct ab8500_charger *di)
{
int ret;
u8 val;
/* Only check CV mode if the charger is online */
if (di->usb.charger_online) {
ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
AB8500_CH_USBCH_STAT1_REG, &val);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return 0;
}
if (val & USB_CH_CV_ON)
ret = 1;
else
ret = 0;
} else {
ret = 0;
}
return ret;
}
/**
* ab8500_charger_detect_chargers() - Detect the connected chargers
* @di: pointer to the ab8500_charger structure
*
* 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, &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,
&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, &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, &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, &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_DELAYED_WORK_DEFERRABLE(&di->check_hw_failure_work,
ab8500_charger_check_hw_failure_work);
INIT_DELAYED_WORK_DEFERRABLE(&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_DELAYED_WORK_DEFERRABLE(&di->kick_wd_work,
ab8500_charger_kick_watchdog_work);
INIT_DELAYED_WORK_DEFERRABLE(&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");
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