summaryrefslogtreecommitdiff
path: root/drivers/power/ab8500_charger.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/power/ab8500_charger.c')
-rw-r--r--drivers/power/ab8500_charger.c1067
1 files changed, 861 insertions, 206 deletions
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 3be9c0ee3fc5..24b30b7ea5ca 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -31,6 +31,7 @@
#include <linux/mfd/abx500/ab8500-gpadc.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/usb/otg.h>
+#include <linux/mutex.h>
/* Charger constants */
#define NO_PW_CONN 0
@@ -54,6 +55,7 @@
#define MAIN_CH_INPUT_CURR_SHIFT 4
#define VBUS_IN_CURR_LIM_SHIFT 4
+#define AUTO_VBUS_IN_CURR_LIM_SHIFT 4
#define LED_INDICATOR_PWM_ENA 0x01
#define LED_INDICATOR_PWM_DIS 0x00
@@ -68,6 +70,11 @@
#define MAIN_CH_NOK 0x01
#define VBUS_DET 0x80
+#define MAIN_CH_STATUS2_MAINCHGDROP 0x80
+#define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
+#define USB_CH_VBUSDROP 0x40
+#define USB_CH_VBUSDETDBNC 0x01
+
/* UsbLineStatus register bit masks */
#define AB8500_USB_LINK_STATUS 0x78
#define AB8500_STD_HOST_SUSP 0x18
@@ -79,6 +86,17 @@
/* Lowest charger voltage is 3.39V -> 0x4E */
#define LOW_VOLT_REG 0x4E
+/* Step up/down delay in us */
+#define STEP_UDELAY 1000
+
+#define CHARGER_STATUS_POLL 10 /* in ms */
+
+#define CHG_WD_INTERVAL (60 * HZ)
+
+#define AB8500_SW_CONTROL_FALLBACK 0x03
+/* Wait for enumeration before charing in us */
+#define WAIT_ACA_RID_ENUMERATION (5 * 1000)
+
/* UsbLineStatus register - usb types */
enum ab8500_charger_link_status {
USB_STAT_NOT_CONFIGURED,
@@ -97,6 +115,13 @@ enum ab8500_charger_link_status {
USB_STAT_HM_IDGND,
USB_STAT_RESERVED,
USB_STAT_NOT_VALID_LINK,
+ USB_STAT_PHY_EN,
+ USB_STAT_SUP_NO_IDGND_VBUS,
+ USB_STAT_SUP_IDGND_VBUS,
+ USB_STAT_CHARGER_LINE_1,
+ USB_STAT_CARKIT_1,
+ USB_STAT_CARKIT_2,
+ USB_STAT_ACA_DOCK_CHARGER,
};
enum ab8500_usb_state {
@@ -149,6 +174,7 @@ struct ab8500_charger_info {
int charger_voltage;
int cv_active;
bool wd_expired;
+ int charger_current;
};
struct ab8500_charger_event_flags {
@@ -159,12 +185,14 @@ struct ab8500_charger_event_flags {
bool usbchargernotok;
bool chgwdexp;
bool vbus_collapse;
+ bool vbus_drop_end;
};
struct ab8500_charger_usb_state {
- bool usb_changed;
int usb_current;
+ int usb_current_tmp;
enum ab8500_usb_state state;
+ enum ab8500_usb_state state_tmp;
spinlock_t usb_lock;
};
@@ -182,11 +210,17 @@ struct ab8500_charger_usb_state {
* charger is enabled
* @vbat Battery voltage
* @old_vbat Previously measured battery voltage
+ * @usb_device_is_unrecognised USB device is unrecognised by the hardware
* @autopower Indicate if we should have automatic pwron after pwrloss
* @autopower_cfg platform specific power config support for "pwron after pwrloss"
+ * @invalid_charger_detect_state State when forcing AB to use invalid charger
+ * @is_usb_host: Indicate if last detected USB type is host
+ * @is_aca_rid: Incicate if accessory is ACA type
+ * @current_stepping_sessions:
+ * Counter for current stepping sessions
* @parent: Pointer to the struct ab8500
* @gpadc: Pointer to the struct gpadc
- * @bat: Pointer to the abx500_bm platform data
+ * @bm: Platform specific battery management information
* @flags: Structure for information about events triggered
* @usb_state: Structure for usb stack information
* @ac_chg: AC charger power supply
@@ -195,19 +229,28 @@ struct ab8500_charger_usb_state {
* @usb: Structure that holds the USB charger properties
* @regu: Pointer to the struct regulator
* @charger_wq: Work queue for the IRQs and checking HW state
+ * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals
+ * @pm_lock: Lock to prevent system to suspend
* @check_vbat_work Work for checking vbat threshold to adjust vbus current
* @check_hw_failure_work: Work for checking HW state
* @check_usbchgnotok_work: Work for checking USB charger not ok status
* @kick_wd_work: Work for kicking the charger watchdog in case
* of ABB rev 1.* due to the watchog logic bug
+ * @ac_charger_attached_work: Work for checking if AC charger is still
+ * connected
+ * @usb_charger_attached_work: Work for checking if USB charger is still
+ * connected
* @ac_work: Work for checking AC charger connection
* @detect_usb_type_work: Work for detecting the USB type connected
* @usb_link_status_work: Work for checking the new USB link status
* @usb_state_changed_work: Work for checking USB state
+ * @attach_work: Work for detecting USB type
+ * @vbus_drop_end_work: Work for detecting VBUS drop end
* @check_main_thermal_prot_work:
* Work for checking Main thermal status
* @check_usb_thermal_prot_work:
* Work for checking USB thermal status
+ * @charger_attached_mutex: For controlling the wakelock
*/
struct ab8500_charger {
struct device *dev;
@@ -219,11 +262,16 @@ struct ab8500_charger {
bool vddadc_en_usb;
int vbat;
int old_vbat;
+ bool usb_device_is_unrecognised;
bool autopower;
bool autopower_cfg;
+ int invalid_charger_detect_state;
+ bool is_usb_host;
+ int is_aca_rid;
+ atomic_t current_stepping_sessions;
struct ab8500 *parent;
struct ab8500_gpadc *gpadc;
- struct abx500_bm_data *bat;
+ struct abx500_bm_data *bm;
struct ab8500_charger_event_flags flags;
struct ab8500_charger_usb_state usb_state;
struct ux500_charger ac_chg;
@@ -232,18 +280,24 @@ struct ab8500_charger {
struct ab8500_charger_info usb;
struct regulator *regu;
struct workqueue_struct *charger_wq;
+ struct mutex usb_ipt_crnt_lock;
struct delayed_work check_vbat_work;
struct delayed_work check_hw_failure_work;
struct delayed_work check_usbchgnotok_work;
struct delayed_work kick_wd_work;
+ struct delayed_work usb_state_changed_work;
+ struct delayed_work attach_work;
+ struct delayed_work ac_charger_attached_work;
+ struct delayed_work usb_charger_attached_work;
+ struct delayed_work vbus_drop_end_work;
struct work_struct ac_work;
struct work_struct detect_usb_type_work;
struct work_struct usb_link_status_work;
- struct work_struct 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;
+ struct mutex charger_attached_mutex;
};
/* AC properties */
@@ -267,50 +321,65 @@ static enum power_supply_property ab8500_charger_usb_props[] = {
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.
+/*
+ * Function for enabling and disabling sw fallback mode
+ * should always be disabled when no charger is connected.
*/
-static void ab8500_power_loss_handling(struct ab8500_charger *di)
+static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
+ bool fallback)
{
+ u8 val;
u8 reg;
+ u8 bank;
+ u8 bit;
int ret;
- dev_dbg(di->dev, "Autopower : %d\n", di->autopower);
+ dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
- /* 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;
+ if (is_ab8500(di->parent)) {
+ bank = 0x15;
+ reg = 0x0;
+ bit = 3;
+ } else {
+ bank = AB8500_SYS_CTRL1_BLOCK;
+ reg = AB8500_SW_CONTROL_FALLBACK;
+ bit = 0;
}
- /* 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__);
+ /* read the register containing fallback bit */
+ ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
+ if (ret < 0) {
+ dev_err(di->dev, "%d read failed\n", __LINE__);
return;
}
- if (di->autopower)
- reg |= 0x8;
+ if (is_ab8500(di->parent)) {
+ /* enable the OPT emulation registers */
+ ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
+ if (ret) {
+ dev_err(di->dev, "%d write failed\n", __LINE__);
+ goto disable_otp;
+ }
+ }
+
+ if (fallback)
+ val |= (1 << bit);
else
- reg &= ~0x8;
+ val &= ~(1 << bit);
- /* write back the changed value to autopower reg */
- ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
+ /* write back the changed fallback bit value to register */
+ ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
if (ret) {
dev_err(di->dev, "%d write failed\n", __LINE__);
- 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;
+disable_otp:
+ if (is_ab8500(di->parent)) {
+ /* disable the set OTP registers again */
+ ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
+ if (ret) {
+ dev_err(di->dev, "%d write failed\n", __LINE__);
+ }
}
}
@@ -329,12 +398,12 @@ static void ab8500_power_supply_changed(struct ab8500_charger *di,
!di->ac.charger_connected &&
di->autopower) {
di->autopower = false;
- ab8500_power_loss_handling(di);
+ ab8500_enable_disable_sw_fallback(di, false);
} else if (!di->autopower &&
(di->ac.charger_connected ||
di->usb.charger_connected)) {
di->autopower = true;
- ab8500_power_loss_handling(di);
+ ab8500_enable_disable_sw_fallback(di, true);
}
}
power_supply_changed(psy);
@@ -347,6 +416,19 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
dev_dbg(di->dev, "USB connected:%i\n", connected);
di->usb.charger_connected = connected;
sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
+
+ if (connected) {
+ mutex_lock(&di->charger_attached_mutex);
+ mutex_unlock(&di->charger_attached_mutex);
+
+ queue_delayed_work(di->charger_wq,
+ &di->usb_charger_attached_work,
+ HZ);
+ } else {
+ cancel_delayed_work_sync(&di->usb_charger_attached_work);
+ mutex_lock(&di->charger_attached_mutex);
+ mutex_unlock(&di->charger_attached_mutex);
+ }
}
}
@@ -500,6 +582,7 @@ static int ab8500_charger_usb_cv(struct ab8500_charger *di)
/**
* ab8500_charger_detect_chargers() - Detect the connected chargers
* @di: pointer to the ab8500_charger structure
+ * @probe: if probe, don't delay and wait for HW
*
* Returns the type of charger connected.
* For USB it will not mean we can actually charge from it
@@ -513,7 +596,7 @@ static int ab8500_charger_usb_cv(struct ab8500_charger *di)
* 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)
+static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
{
int result = NO_PW_CONN;
int ret;
@@ -531,13 +614,25 @@ static int ab8500_charger_detect_chargers(struct ab8500_charger *di)
result = AC_PW_CONN;
/* Check for USB charger */
+
+ if (!probe) {
+ /*
+ * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
+ * when disconnecting ACA even though no
+ * charger was connected. Try waiting a little
+ * longer than the 100 ms of VBUS_DET_DBNC100...
+ */
+ msleep(110);
+ }
ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
AB8500_CH_USBCH_STAT1_REG, &val);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return ret;
}
-
+ dev_dbg(di->dev,
+ "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
+ val);
if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
result |= USB_PW_CONN;
@@ -554,31 +649,53 @@ static int ab8500_charger_detect_chargers(struct ab8500_charger *di)
* 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)
+ enum ab8500_charger_link_status link_status)
{
int ret = 0;
+ di->usb_device_is_unrecognised = false;
+
+ /*
+ * Platform only supports USB 2.0.
+ * This means that charging current from USB source
+ * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
+ * should set USB_CH_IP_CUR_LVL_0P5.
+ */
+
switch (link_status) {
case USB_STAT_STD_HOST_NC:
case USB_STAT_STD_HOST_C_NS:
case USB_STAT_STD_HOST_C_S:
dev_dbg(di->dev, "USB Type - Standard host is "
"detected through USB driver\n");
- di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ di->is_usb_host = true;
+ di->is_aca_rid = 0;
break;
case USB_STAT_HOST_CHG_HS_CHIRP:
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ di->is_usb_host = true;
+ di->is_aca_rid = 0;
break;
case USB_STAT_HOST_CHG_HS:
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ di->is_usb_host = true;
+ di->is_aca_rid = 0;
+ break;
case USB_STAT_ACA_RID_C_HS:
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9;
+ di->is_usb_host = false;
+ di->is_aca_rid = 0;
break;
case USB_STAT_ACA_RID_A:
/*
* Dedicated charger level minus maximum current accessory
- * can consume (300mA). Closest level is 1100mA
+ * can consume (900mA). Closest level is 500mA
*/
- di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1;
+ dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ di->is_usb_host = false;
+ di->is_aca_rid = 1;
break;
case USB_STAT_ACA_RID_B:
/*
@@ -586,34 +703,68 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
* 100mA for potential accessory). Closest level is 1300mA
*/
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3;
+ dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
+ di->max_usb_in_curr);
+ di->is_usb_host = false;
+ di->is_aca_rid = 1;
break;
- case USB_STAT_DEDICATED_CHG:
case USB_STAT_HOST_CHG_NM:
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ di->is_usb_host = true;
+ di->is_aca_rid = 0;
+ break;
+ case USB_STAT_DEDICATED_CHG:
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
+ di->is_usb_host = false;
+ di->is_aca_rid = 0;
+ break;
case USB_STAT_ACA_RID_C_HS_CHIRP:
case USB_STAT_ACA_RID_C_NM:
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
+ di->is_usb_host = false;
+ di->is_aca_rid = 1;
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:
+ if (di->vbus_detected) {
+ di->usb_device_is_unrecognised = true;
+ dev_dbg(di->dev, "USB Type - Legacy charger.\n");
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
+ break;
+ }
+ case USB_STAT_HM_IDGND:
dev_err(di->dev, "USB Type - Charging not allowed\n");
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
ret = -ENXIO;
break;
+ case USB_STAT_RESERVED:
+ if (is_ab8500(di->parent)) {
+ di->flags.vbus_collapse = true;
+ dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
+ "VBUS has collapsed\n");
+ ret = -ENXIO;
+ break;
+ }
+ if (is_ab9540(di->parent) || is_ab8505(di->parent)) {
+ dev_dbg(di->dev, "USB Type - Charging not allowed\n");
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
+ dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
+ link_status, di->max_usb_in_curr);
+ ret = -ENXIO;
+ break;
+ }
+ break;
+ case USB_STAT_CARKIT_1:
+ case USB_STAT_CARKIT_2:
+ case USB_STAT_ACA_DOCK_CHARGER:
+ case USB_STAT_CHARGER_LINE_1:
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
+ di->max_usb_in_curr);
+ case USB_STAT_NOT_VALID_LINK:
+ dev_err(di->dev, "USB Type invalid - try charging anyway\n");
+ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
+ break;
+
default:
dev_err(di->dev, "USB Type - Unknown\n");
di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
@@ -645,8 +796,14 @@ static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
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 (is_ab8500(di->parent)) {
+ ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
+ AB8500_USB_LINE_STAT_REG, &val);
+ } else {
+ if (is_ab9540(di->parent) || is_ab8505(di->parent))
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
+ }
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return ret;
@@ -682,16 +839,25 @@ static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
ret = abx500_get_register_interruptible(di->dev,
AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
&val);
+ dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
+ __func__, val);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return ret;
}
- ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
- AB8500_USB_LINE_STAT_REG, &val);
+
+ if (is_ab8500(di->parent))
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
+ else
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
if (ret < 0) {
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
return ret;
}
+ dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
+ val);
/*
* Until the IT source register is read the UsbLineStatus
* register is not updated, hence doing the same
@@ -936,6 +1102,144 @@ static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
}
/**
+ * ab8500_charger_set_current() - set charger current
+ * @di: pointer to the ab8500_charger structure
+ * @ich: charger current, in mA
+ * @reg: select what charger register to set
+ *
+ * Set charger current.
+ * There is no state machine in the AB to step up/down the charger
+ * current to avoid dips and spikes on MAIN, VBUS and VBAT when
+ * charging is started. Instead we need to implement
+ * this charger current step-up/down here.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_current(struct ab8500_charger *di,
+ int ich, int reg)
+{
+ int ret = 0;
+ int auto_curr_index, curr_index, prev_curr_index, shift_value, i;
+ u8 reg_value;
+ u32 step_udelay;
+ bool no_stepping = false;
+
+ atomic_inc(&di->current_stepping_sessions);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+ reg, &reg_value);
+ if (ret < 0) {
+ dev_err(di->dev, "%s read failed\n", __func__);
+ goto exit_set_current;
+ }
+
+ switch (reg) {
+ case AB8500_MCH_IPT_CURLVL_REG:
+ shift_value = MAIN_CH_INPUT_CURR_SHIFT;
+ prev_curr_index = (reg_value >> shift_value);
+ curr_index = ab8500_current_to_regval(ich);
+ step_udelay = STEP_UDELAY;
+ if (!di->ac.charger_connected)
+ no_stepping = true;
+ break;
+ case AB8500_USBCH_IPT_CRNTLVL_REG:
+ shift_value = VBUS_IN_CURR_LIM_SHIFT;
+ prev_curr_index = (reg_value >> shift_value);
+ curr_index = ab8500_vbus_in_curr_to_regval(ich);
+ step_udelay = STEP_UDELAY * 100;
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+ AB8500_CH_USBCH_STAT2_REG, &reg_value);
+ if (ret < 0) {
+ dev_err(di->dev, "%s read failed\n", __func__);
+ goto exit_set_current;
+ }
+ auto_curr_index =
+ reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT;
+
+ dev_dbg(di->dev, "%s Auto VBUS curr is %d mA\n",
+ __func__,
+ ab8500_charger_vbus_in_curr_map[auto_curr_index]);
+
+ prev_curr_index = min(prev_curr_index, auto_curr_index);
+
+ if (!di->usb.charger_connected)
+ no_stepping = true;
+ break;
+ case AB8500_CH_OPT_CRNTLVL_REG:
+ shift_value = 0;
+ prev_curr_index = (reg_value >> shift_value);
+ curr_index = ab8500_current_to_regval(ich);
+ step_udelay = STEP_UDELAY;
+ if (curr_index && (curr_index - prev_curr_index) > 1)
+ step_udelay *= 100;
+
+ if (!di->usb.charger_connected && !di->ac.charger_connected)
+ no_stepping = true;
+
+ break;
+ default:
+ dev_err(di->dev, "%s current register not valid\n", __func__);
+ ret = -ENXIO;
+ goto exit_set_current;
+ }
+
+ if (curr_index < 0) {
+ dev_err(di->dev, "requested current limit out-of-range\n");
+ ret = -ENXIO;
+ goto exit_set_current;
+ }
+
+ /* only update current if it's been changed */
+ if (prev_curr_index == curr_index) {
+ dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
+ __func__, reg);
+ ret = 0;
+ goto exit_set_current;
+ }
+
+ dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
+ __func__, ich, reg);
+
+ if (no_stepping) {
+ ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+ reg, (u8)curr_index << shift_value);
+ if (ret)
+ dev_err(di->dev, "%s write failed\n", __func__);
+ } else if (prev_curr_index > curr_index) {
+ for (i = prev_curr_index - 1; i >= curr_index; i--) {
+ dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
+ (u8) i << shift_value, reg);
+ ret = abx500_set_register_interruptible(di->dev,
+ AB8500_CHARGER, reg, (u8)i << shift_value);
+ if (ret) {
+ dev_err(di->dev, "%s write failed\n", __func__);
+ goto exit_set_current;
+ }
+ if (i != curr_index)
+ usleep_range(step_udelay, step_udelay * 2);
+ }
+ } else {
+ for (i = prev_curr_index + 1; i <= curr_index; i++) {
+ dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
+ (u8)i << shift_value, reg);
+ ret = abx500_set_register_interruptible(di->dev,
+ AB8500_CHARGER, reg, (u8)i << shift_value);
+ if (ret) {
+ dev_err(di->dev, "%s write failed\n", __func__);
+ goto exit_set_current;
+ }
+ if (i != curr_index)
+ usleep_range(step_udelay, step_udelay * 2);
+ }
+ }
+
+exit_set_current:
+ atomic_dec(&di->current_stepping_sessions);
+
+ return ret;
+}
+
+/**
* ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
* @di: pointer to the ab8500_charger structure
* @ich_in: charger input current limit
@@ -946,12 +1250,11 @@ static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
int ich_in)
{
- int ret;
- int input_curr_index;
int min_value;
+ int ret;
/* We should always use to lowest current limit */
- min_value = min(di->bat->chg_params->usb_curr_max, ich_in);
+ min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
switch (min_value) {
case 100:
@@ -966,22 +1269,47 @@ static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
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;
- }
+ dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
- 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__);
+ mutex_lock(&di->usb_ipt_crnt_lock);
+ ret = ab8500_charger_set_current(di, min_value,
+ AB8500_USBCH_IPT_CRNTLVL_REG);
+ mutex_unlock(&di->usb_ipt_crnt_lock);
return ret;
}
/**
+ * ab8500_charger_set_main_in_curr() - set main charger input current
+ * @di: pointer to the ab8500_charger structure
+ * @ich_in: input charger current, in mA
+ *
+ * Set main charger input current.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
+ int ich_in)
+{
+ return ab8500_charger_set_current(di, ich_in,
+ AB8500_MCH_IPT_CURLVL_REG);
+}
+
+/**
+ * ab8500_charger_set_output_curr() - set charger output current
+ * @di: pointer to the ab8500_charger structure
+ * @ich_out: output charger current, in mA
+ *
+ * Set charger output current.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
+ int ich_out)
+{
+ return ab8500_charger_set_current(di, ich_out,
+ AB8500_CH_OPT_CRNTLVL_REG);
+}
+
+/**
* ab8500_charger_led_en() - turn on/off chargign led
* @di: pointer to the ab8500_charger structure
* @on: flag to turn on/off the chargign led
@@ -1074,7 +1402,7 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
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);
+ di->bm->chg_params->ac_curr_max);
if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
dev_err(di->dev,
"Charger voltage or current too high, "
@@ -1090,23 +1418,24 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
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);
+ ret = ab8500_charger_set_main_in_curr(di,
+ di->bm->chg_params->ac_curr_max);
if (ret) {
- dev_err(di->dev, "%s write failed\n", __func__);
+ dev_err(di->dev, "%s Failed to set MainChInputCurr\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);
+ ret = ab8500_charger_set_output_curr(di, iset);
if (ret) {
- dev_err(di->dev, "%s write failed\n", __func__);
+ dev_err(di->dev, "%s "
+ "Failed to set ChOutputCurentLevel\n",
+ __func__);
return ret;
}
/* Check if VBAT overshoot control should be enabled */
- if (!di->bat->enable_overshoot)
+ if (!di->bm->enable_overshoot)
overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
/* Enable Main Charger */
@@ -1158,12 +1487,11 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
return ret;
}
- ret = abx500_set_register_interruptible(di->dev,
- AB8500_CHARGER,
- AB8500_CH_OPT_CRNTLVL_REG, CH_OP_CUR_LVL_0P1);
+ ret = ab8500_charger_set_output_curr(di, 0);
if (ret) {
- dev_err(di->dev,
- "%s write failed\n", __func__);
+ dev_err(di->dev, "%s "
+ "Failed to set ChOutputCurentLevel\n",
+ __func__);
return ret;
}
} else {
@@ -1259,24 +1587,13 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
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)
+ if (!di->bm->enable_overshoot)
overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
/* Enable USB Charger */
+ dev_dbg(di->dev,
+ "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
if (ret) {
@@ -1289,11 +1606,29 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
if (ret < 0)
dev_err(di->dev, "failed to enable LED\n");
+ di->usb.charger_online = 1;
+
+ /* USBChInputCurr: current that can be drawn from the usb */
+ ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
+ if (ret) {
+ dev_err(di->dev, "setting USBChInputCurr failed\n");
+ return ret;
+ }
+
+ /* ChOutputCurentLevel: protected output current */
+ ret = ab8500_charger_set_output_curr(di, ich_out);
+ if (ret) {
+ dev_err(di->dev, "%s "
+ "Failed to set ChOutputCurentLevel\n",
+ __func__);
+ return ret;
+ }
+
queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
- di->usb.charger_online = 1;
} else {
/* Disable USB charging */
+ dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
ret = abx500_set_register_interruptible(di->dev,
AB8500_CHARGER,
AB8500_USBCH_CTRL1_REG, 0);
@@ -1306,7 +1641,21 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
ret = ab8500_charger_led_en(di, false);
if (ret < 0)
dev_err(di->dev, "failed to disable LED\n");
+ /* USBChInputCurr: current that can be drawn from the usb */
+ ret = ab8500_charger_set_vbus_in_curr(di, 0);
+ if (ret) {
+ dev_err(di->dev, "setting USBChInputCurr failed\n");
+ return ret;
+ }
+ /* ChOutputCurentLevel: protected output current */
+ ret = ab8500_charger_set_output_curr(di, 0);
+ if (ret) {
+ dev_err(di->dev, "%s "
+ "Failed to reset ChOutputCurentLevel\n",
+ __func__);
+ return ret;
+ }
di->usb.charger_online = 0;
di->usb.wd_expired = false;
@@ -1366,7 +1715,6 @@ 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)
@@ -1376,18 +1724,11 @@ static int ab8500_charger_update_charger_current(struct ux500_charger *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);
+ ret = ab8500_charger_set_output_curr(di, ich_out);
if (ret) {
- dev_err(di->dev, "%s write failed\n", __func__);
+ dev_err(di->dev, "%s "
+ "Failed to set ChOutputCurentLevel\n",
+ __func__);
return ret;
}
@@ -1597,7 +1938,7 @@ static void ab8500_charger_ac_work(struct work_struct *work)
* synchronously, we have the check if the main charger is
* connected by reading the status register
*/
- ret = ab8500_charger_detect_chargers(di);
+ ret = ab8500_charger_detect_chargers(di, false);
if (ret < 0)
return;
@@ -1612,6 +1953,84 @@ static void ab8500_charger_ac_work(struct work_struct *work)
sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
}
+static void ab8500_charger_usb_attached_work(struct work_struct *work)
+{
+ struct ab8500_charger *di = container_of(work,
+ struct ab8500_charger,
+ usb_charger_attached_work.work);
+ int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
+ int ret, i;
+ u8 statval;
+
+ for (i = 0; i < 10; i++) {
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_CHARGER,
+ AB8500_CH_USBCH_STAT1_REG,
+ &statval);
+ if (ret < 0) {
+ dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+ goto reschedule;
+ }
+ if ((statval & usbch) != usbch)
+ goto reschedule;
+
+ msleep(CHARGER_STATUS_POLL);
+ }
+
+ ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
+
+ mutex_lock(&di->charger_attached_mutex);
+ mutex_unlock(&di->charger_attached_mutex);
+
+ return;
+
+reschedule:
+ queue_delayed_work(di->charger_wq,
+ &di->usb_charger_attached_work,
+ HZ);
+}
+
+static void ab8500_charger_ac_attached_work(struct work_struct *work)
+{
+
+ struct ab8500_charger *di = container_of(work,
+ struct ab8500_charger,
+ ac_charger_attached_work.work);
+ int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
+ MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
+ int ret, i;
+ u8 statval;
+
+ for (i = 0; i < 10; i++) {
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_CHARGER,
+ AB8500_CH_STATUS2_REG,
+ &statval);
+ if (ret < 0) {
+ dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+ goto reschedule;
+ }
+
+ if ((statval & mainch) != mainch)
+ goto reschedule;
+
+ msleep(CHARGER_STATUS_POLL);
+ }
+
+ ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
+ queue_work(di->charger_wq, &di->ac_work);
+
+ mutex_lock(&di->charger_attached_mutex);
+ mutex_unlock(&di->charger_attached_mutex);
+
+ return;
+
+reschedule:
+ queue_delayed_work(di->charger_wq,
+ &di->ac_charger_attached_work,
+ HZ);
+}
+
/**
* ab8500_charger_detect_usb_type_work() - work to detect USB type
* @work: Pointer to the work_struct structure
@@ -1630,16 +2049,18 @@ static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
* synchronously, we have the check if is
* connected by reading the status register
*/
- ret = ab8500_charger_detect_chargers(di);
+ ret = ab8500_charger_detect_chargers(di, false);
if (ret < 0)
return;
if (!(ret & USB_PW_CONN)) {
- di->vbus_detected = 0;
+ dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
+ di->vbus_detected = false;
ab8500_charger_set_usb_connected(di, false);
ab8500_power_supply_changed(di, &di->usb_chg.psy);
} else {
- di->vbus_detected = 1;
+ dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
+ di->vbus_detected = true;
if (is_ab8500_1p1_or_earlier(di->parent)) {
ret = ab8500_charger_detect_usb_type(di);
@@ -1649,7 +2070,8 @@ static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
&di->usb_chg.psy);
}
} else {
- /* For ABB cut2.0 and onwards we have an IRQ,
+ /*
+ * 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
@@ -1670,6 +2092,29 @@ static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
}
/**
+ * ab8500_charger_usb_link_attach_work() - work to detect USB type
+ * @work: pointer to the work_struct structure
+ *
+ * Detect the type of USB plugged
+ */
+static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
+{</