Initial Contribution
msm-2.6.38: tag AU_LINUX_ANDROID_GINGERBREAD.02.03.04.00.142
Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
diff --git a/drivers/power/pm8921-charger.c b/drivers/power/pm8921-charger.c
new file mode 100644
index 0000000..6775fba
--- /dev/null
+++ b/drivers/power/pm8921-charger.c
@@ -0,0 +1,1560 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/mfd/pm8xxx/pm8921-charger.h>
+#include <linux/mfd/pm8xxx/pm8921-bms.h>
+#include <linux/mfd/pm8921-adc.h>
+#include <linux/mfd/pm8xxx/core.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/workqueue.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+#include <mach/msm_xo.h>
+#include <mach/msm_hsusb.h>
+
+#define CHG_BUCK_CLOCK_CTRL 0x14
+
+#define PBL_ACCESS1 0x04
+#define PBL_ACCESS2 0x05
+#define SYS_CONFIG_1 0x06
+#define SYS_CONFIG_2 0x07
+#define CHG_CNTRL 0x204
+#define CHG_IBAT_MAX 0x205
+#define CHG_TEST 0x206
+#define CHG_BUCK_CTRL_TEST1 0x207
+#define CHG_BUCK_CTRL_TEST2 0x208
+#define CHG_BUCK_CTRL_TEST3 0x209
+#define COMPARATOR_OVERRIDE 0x20A
+#define PSI_TXRX_SAMPLE_DATA_0 0x20B
+#define PSI_TXRX_SAMPLE_DATA_1 0x20C
+#define PSI_TXRX_SAMPLE_DATA_2 0x20D
+#define PSI_TXRX_SAMPLE_DATA_3 0x20E
+#define PSI_CONFIG_STATUS 0x20F
+#define CHG_IBAT_SAFE 0x210
+#define CHG_ITRICKLE 0x211
+#define CHG_CNTRL_2 0x212
+#define CHG_VBAT_DET 0x213
+#define CHG_VTRICKLE 0x214
+#define CHG_ITERM 0x215
+#define CHG_CNTRL_3 0x216
+#define CHG_VIN_MIN 0x217
+#define CHG_TWDOG 0x218
+#define CHG_TTRKL_MAX 0x219
+#define CHG_TEMP_THRESH 0x21A
+#define CHG_TCHG_MAX 0x21B
+#define USB_OVP_CONTROL 0x21C
+#define DC_OVP_CONTROL 0x21D
+#define USB_OVP_TEST 0x21E
+#define DC_OVP_TEST 0x21F
+#define CHG_VDD_MAX 0x220
+#define CHG_VDD_SAFE 0x221
+#define CHG_VBAT_BOOT_THRESH 0x222
+#define USB_OVP_TRIM 0x355
+#define BUCK_CONTROL_TRIM1 0x356
+#define BUCK_CONTROL_TRIM2 0x357
+#define BUCK_CONTROL_TRIM3 0x358
+#define BUCK_CONTROL_TRIM4 0x359
+#define CHG_DEFAULTS_TRIM 0x35A
+#define CHG_ITRIM 0x35B
+#define CHG_TTRIM 0x35C
+#define CHG_COMP_OVR 0x20A
+
+enum chg_fsm_state {
+ FSM_STATE_OFF_0 = 0,
+ FSM_STATE_BATFETDET_START_12 = 12,
+ FSM_STATE_BATFETDET_END_16 = 16,
+ FSM_STATE_ON_CHG_HIGHI_1 = 1,
+ FSM_STATE_ATC_2A = 2,
+ FSM_STATE_ATC_2B = 18,
+ FSM_STATE_ON_BAT_3 = 3,
+ FSM_STATE_ATC_FAIL_4 = 4 ,
+ FSM_STATE_DELAY_5 = 5,
+ FSM_STATE_ON_CHG_AND_BAT_6 = 6,
+ FSM_STATE_FAST_CHG_7 = 7,
+ FSM_STATE_TRKL_CHG_8 = 8,
+ FSM_STATE_CHG_FAIL_9 = 9,
+ FSM_STATE_EOC_10 = 10,
+ FSM_STATE_ON_CHG_VREGOK_11 = 11,
+ FSM_STATE_ATC_PAUSE_13 = 13,
+ FSM_STATE_FAST_CHG_PAUSE_14 = 14,
+ FSM_STATE_TRKL_CHG_PAUSE_15 = 15,
+ FSM_STATE_START_BOOT = 20,
+ FSM_STATE_FLCB_VREGOK = 21,
+ FSM_STATE_FLCB = 22,
+};
+
+enum pmic_chg_interrupts {
+ USBIN_VALID_IRQ = 0,
+ USBIN_OV_IRQ,
+ BATT_INSERTED_IRQ,
+ VBATDET_LOW_IRQ,
+ USBIN_UV_IRQ,
+ VBAT_OV_IRQ,
+ CHGWDOG_IRQ,
+ VCP_IRQ,
+ ATCDONE_IRQ,
+ ATCFAIL_IRQ,
+ CHGDONE_IRQ,
+ CHGFAIL_IRQ,
+ CHGSTATE_IRQ,
+ LOOP_CHANGE_IRQ,
+ FASTCHG_IRQ,
+ TRKLCHG_IRQ,
+ BATT_REMOVED_IRQ,
+ BATTTEMP_HOT_IRQ,
+ CHGHOT_IRQ,
+ BATTTEMP_COLD_IRQ,
+ CHG_GONE_IRQ,
+ BAT_TEMP_OK_IRQ,
+ COARSE_DET_LOW_IRQ,
+ VDD_LOOP_IRQ,
+ VREG_OV_IRQ,
+ VBATDET_IRQ,
+ BATFET_IRQ,
+ PSI_IRQ,
+ DCIN_VALID_IRQ,
+ DCIN_OV_IRQ,
+ DCIN_UV_IRQ,
+ PM_CHG_MAX_INTS,
+};
+
+struct bms_notify {
+ int is_charging;
+ struct work_struct work;
+};
+
+/**
+ * struct pm8921_chg_chip -device information
+ * @dev: device pointer to access the parent
+ * @is_usb_path_used: indicates whether USB charging is used at all
+ * @is_usb_path_used: indicates whether DC charging is used at all
+ * @usb_present: present status of usb
+ * @dc_present: present status of dc
+ * @usb_charger_current: usb current to charge the battery with used when
+ * the usb path is enabled or charging is resumed
+ * @safety_time: max time for which charging will happen
+ * @update_time: how frequently the userland needs to be updated
+ * @max_voltage: the max volts the batt should be charged up to
+ * @min_voltage: the min battery voltage before turning the FETon
+ * @resume_voltage: the voltage at which the battery should resume
+ * charging
+ * @term_current: The charging based term current
+ *
+ */
+struct pm8921_chg_chip {
+ struct device *dev;
+ unsigned int usb_present;
+ unsigned int dc_present;
+ unsigned int usb_charger_current;
+ unsigned int pmic_chg_irq[PM_CHG_MAX_INTS];
+ unsigned int safety_time;
+ unsigned int update_time;
+ unsigned int max_voltage;
+ unsigned int min_voltage;
+ unsigned int resume_voltage;
+ unsigned int term_current;
+ unsigned int vbat_channel;
+ struct power_supply usb_psy;
+ struct power_supply dc_psy;
+ struct power_supply batt_psy;
+ struct dentry *dent;
+ struct bms_notify bms_notify;
+ DECLARE_BITMAP(enabled_irqs, PM_CHG_MAX_INTS);
+};
+
+static int charging_disabled;
+
+static struct pm8921_chg_chip *the_chip;
+
+static int pm_chg_masked_write(struct pm8921_chg_chip *chip, u16 addr,
+ u8 mask, u8 val)
+{
+ int rc;
+ u8 reg;
+
+ rc = pm8xxx_readb(chip->dev->parent, addr, ®);
+ if (rc) {
+ pr_err("pm8xxx_readb failed: addr=%03X, rc=%d\n", addr, rc);
+ return rc;
+ }
+ reg &= ~mask;
+ reg |= val & mask;
+ rc = pm8xxx_writeb(chip->dev->parent, addr, reg);
+ if (rc) {
+ pr_err("pm8xxx_writeb failed: addr=%03X, rc=%d\n", addr, rc);
+ return rc;
+ }
+ return 0;
+}
+
+#define CAPTURE_FSM_STATE_CMD 0xC2
+#define READ_BANK_7 0x70
+#define READ_BANK_4 0x40
+static int pm_chg_get_fsm_state(struct pm8921_chg_chip *chip)
+{
+ u8 temp;
+ int err, ret = 0;
+
+ temp = CAPTURE_FSM_STATE_CMD;
+ err = pm8xxx_writeb(chip->dev->parent, CHG_TEST, temp);
+ if (err) {
+ pr_err("Error %d writing %d to addr %d\n", err, temp, CHG_TEST);
+ return err;
+ }
+
+ temp = READ_BANK_7;
+ err = pm8xxx_writeb(chip->dev->parent, CHG_TEST, temp);
+ if (err) {
+ pr_err("Error %d writing %d to addr %d\n", err, temp, CHG_TEST);
+ return err;
+ }
+
+ err = pm8xxx_readb(chip->dev->parent, CHG_TEST, &temp);
+ if (err) {
+ pr_err("pm8xxx_readb fail: addr=%03X, rc=%d\n", CHG_TEST, err);
+ return err;
+ }
+ /* get the lower 4 bits */
+ ret = temp & 0xF;
+
+ temp = READ_BANK_4;
+ err = pm8xxx_writeb(chip->dev->parent, CHG_TEST, temp);
+ if (err) {
+ pr_err("Error %d writing %d to addr %d\n", err, temp, CHG_TEST);
+ return err;
+ }
+
+ err = pm8xxx_readb(chip->dev->parent, CHG_TEST, &temp);
+ if (err) {
+ pr_err("pm8xxx_readb fail: addr=%03X, rc=%d\n", CHG_TEST, err);
+ return err;
+ }
+ /* get the upper 1 bit */
+ ret |= (temp & 0x1) << 4;
+ return ret;
+}
+
+#define CHG_USB_SUSPEND_BIT BIT(2)
+static int pm_chg_usb_suspend_enable(struct pm8921_chg_chip *chip, int enable)
+{
+ return pm_chg_masked_write(chip, CHG_CNTRL_3, CHG_USB_SUSPEND_BIT,
+ enable ? CHG_USB_SUSPEND_BIT : 0);
+}
+
+#define CHG_EN_BIT BIT(7)
+static int pm_chg_auto_enable(struct pm8921_chg_chip *chip, int enable)
+{
+ return pm_chg_masked_write(chip, CHG_CNTRL_3, CHG_EN_BIT,
+ enable ? CHG_EN_BIT : 0);
+}
+
+#define CHG_CHARGE_DIS_BIT BIT(1)
+static int pm_chg_charge_dis(struct pm8921_chg_chip *chip, int disable)
+{
+ return pm_chg_masked_write(chip, CHG_CNTRL, CHG_CHARGE_DIS_BIT,
+ disable ? CHG_CHARGE_DIS_BIT : 0);
+}
+
+#define PM8921_CHG_V_MIN_MV 3240
+#define PM8921_CHG_V_STEP_MV 20
+#define PM8921_CHG_VDDMAX_MAX 4500
+#define PM8921_CHG_VDDMAX_MIN 3400
+#define PM8921_CHG_V_MASK 0x7F
+static int pm_chg_vddmax_set(struct pm8921_chg_chip *chip, int voltage)
+{
+ u8 temp;
+
+ if (voltage < PM8921_CHG_VDDMAX_MIN
+ || voltage > PM8921_CHG_VDDMAX_MAX) {
+ pr_err("bad mV=%d asked to set\n", voltage);
+ return -EINVAL;
+ }
+ temp = (voltage - PM8921_CHG_V_MIN_MV) / PM8921_CHG_V_STEP_MV;
+ pr_debug("voltage=%d setting %02x\n", voltage, temp);
+ return pm_chg_masked_write(chip, CHG_VDD_MAX, PM8921_CHG_V_MASK, temp);
+}
+
+#define PM8921_CHG_VDDSAFE_MIN 3400
+#define PM8921_CHG_VDDSAFE_MAX 4500
+static int pm_chg_vddsafe_set(struct pm8921_chg_chip *chip, int voltage)
+{
+ u8 temp;
+
+ if (voltage < PM8921_CHG_VDDSAFE_MIN
+ || voltage > PM8921_CHG_VDDSAFE_MAX) {
+ pr_err("bad mV=%d asked to set\n", voltage);
+ return -EINVAL;
+ }
+ temp = (voltage - PM8921_CHG_V_MIN_MV) / PM8921_CHG_V_STEP_MV;
+ pr_debug("voltage=%d setting %02x\n", voltage, temp);
+ return pm_chg_masked_write(chip, CHG_VDD_SAFE, PM8921_CHG_V_MASK, temp);
+}
+
+#define PM8921_CHG_VBATDET_MIN 3240
+#define PM8921_CHG_VBATDET_MAX 5780
+static int pm_chg_vbatdet_set(struct pm8921_chg_chip *chip, int voltage)
+{
+ u8 temp;
+
+ if (voltage < PM8921_CHG_VBATDET_MIN
+ || voltage > PM8921_CHG_VBATDET_MAX) {
+ pr_err("bad mV=%d asked to set\n", voltage);
+ return -EINVAL;
+ }
+ temp = (voltage - PM8921_CHG_V_MIN_MV) / PM8921_CHG_V_STEP_MV;
+ pr_debug("voltage=%d setting %02x\n", voltage, temp);
+ return pm_chg_masked_write(chip, CHG_VBAT_DET, PM8921_CHG_V_MASK, temp);
+}
+
+#define PM8921_CHG_IBATMAX_MIN 325
+#define PM8921_CHG_IBATMAX_MAX 2000
+#define PM8921_CHG_I_MIN_MA 225
+#define PM8921_CHG_I_STEP_MA 50
+#define PM8921_CHG_I_MASK 0x3F
+static int pm_chg_ibatmax_set(struct pm8921_chg_chip *chip, int chg_current)
+{
+ u8 temp;
+
+ if (chg_current < PM8921_CHG_IBATMAX_MIN
+ || chg_current > PM8921_CHG_IBATMAX_MAX) {
+ pr_err("bad mA=%d asked to set\n", chg_current);
+ return -EINVAL;
+ }
+ temp = (chg_current - PM8921_CHG_I_MIN_MA) / PM8921_CHG_I_STEP_MA;
+ return pm_chg_masked_write(chip, CHG_IBAT_MAX, PM8921_CHG_I_MASK, temp);
+}
+
+#define PM8921_CHG_IBATSAFE_MIN 225
+#define PM8921_CHG_IBATSAFE_MAX 3375
+static int pm_chg_ibatsafe_set(struct pm8921_chg_chip *chip, int chg_current)
+{
+ u8 temp;
+
+ if (chg_current < PM8921_CHG_IBATSAFE_MIN
+ || chg_current > PM8921_CHG_IBATSAFE_MAX) {
+ pr_err("bad mA=%d asked to set\n", chg_current);
+ return -EINVAL;
+ }
+ temp = (chg_current - PM8921_CHG_I_MIN_MA) / PM8921_CHG_I_STEP_MA;
+ return pm_chg_masked_write(chip, CHG_IBAT_SAFE,
+ PM8921_CHG_I_MASK, temp);
+}
+
+#define PM8921_CHG_ITERM_MIN 50
+#define PM8921_CHG_ITERM_MAX 200
+#define PM8921_CHG_ITERM_MIN_MA 50
+#define PM8921_CHG_ITERM_STEP_MA 10
+#define PM8921_CHG_ITERM_MASK 0xF
+static int pm_chg_iterm_set(struct pm8921_chg_chip *chip, int chg_current)
+{
+ u8 temp;
+
+ if (chg_current < PM8921_CHG_ITERM_MIN
+ || chg_current > PM8921_CHG_ITERM_MAX) {
+ pr_err("bad mA=%d asked to set\n", chg_current);
+ return -EINVAL;
+ }
+
+ temp = (chg_current - PM8921_CHG_ITERM_MIN_MA)
+ / PM8921_CHG_ITERM_STEP_MA;
+ return pm_chg_masked_write(chip, CHG_IBAT_SAFE, PM8921_CHG_ITERM_MASK,
+ temp);
+}
+
+#define PM8921_CHG_IUSB_MASK 0x1C
+#define PM8921_CHG_IUSB_MAX 7
+#define PM8921_CHG_IUSB_MIN 0
+static int pm_chg_iusbmax_set(struct pm8921_chg_chip *chip, int chg_current)
+{
+ u8 temp;
+
+ if (chg_current < PM8921_CHG_IUSB_MIN
+ || chg_current > PM8921_CHG_IUSB_MAX) {
+ pr_err("bad mA=%d asked to set\n", chg_current);
+ return -EINVAL;
+ }
+ temp = chg_current << 2;
+ return pm_chg_masked_write(chip, PBL_ACCESS2, PM8921_CHG_IUSB_MASK,
+ temp);
+}
+
+#define PM8921_CHG_WD_MASK 0x1F
+static int pm_chg_disable_wd(struct pm8921_chg_chip *chip)
+{
+ /* writing 0 to the wd timer disables it */
+ return pm_chg_masked_write(chip, CHG_TWDOG, PM8921_CHG_WD_MASK,
+ 0);
+}
+
+static void pm8921_chg_enable_irq(struct pm8921_chg_chip *chip, int interrupt)
+{
+ if (!__test_and_set_bit(interrupt, chip->enabled_irqs)) {
+ dev_dbg(chip->dev, "%d\n", chip->pmic_chg_irq[interrupt]);
+ enable_irq(chip->pmic_chg_irq[interrupt]);
+ }
+}
+
+static void pm8921_chg_disable_irq(struct pm8921_chg_chip *chip, int interrupt)
+{
+ if (__test_and_clear_bit(interrupt, chip->enabled_irqs)) {
+ dev_dbg(chip->dev, "%d\n", chip->pmic_chg_irq[interrupt]);
+ disable_irq_nosync(chip->pmic_chg_irq[interrupt]);
+ }
+}
+
+static int pm_chg_get_rt_status(struct pm8921_chg_chip *chip, int irq_id)
+{
+ return pm8xxx_read_irq_stat(chip->dev->parent,
+ chip->pmic_chg_irq[irq_id]);
+}
+
+/* Treat OverVoltage/UnderVoltage as source missing */
+static int is_usb_chg_plugged_in(struct pm8921_chg_chip *chip)
+{
+ int pres, ov, uv;
+
+ pres = pm_chg_get_rt_status(chip, USBIN_VALID_IRQ);
+ ov = pm_chg_get_rt_status(chip, USBIN_OV_IRQ);
+ uv = pm_chg_get_rt_status(chip, USBIN_UV_IRQ);
+
+ return pres && !ov && !uv;
+}
+
+/* Treat OverVoltage/UnderVoltage as source missing */
+static int is_dc_chg_plugged_in(struct pm8921_chg_chip *chip)
+{
+ int pres, ov, uv;
+
+ pres = pm_chg_get_rt_status(chip, DCIN_VALID_IRQ);
+ ov = pm_chg_get_rt_status(chip, DCIN_OV_IRQ);
+ uv = pm_chg_get_rt_status(chip, DCIN_UV_IRQ);
+
+ return pres && !ov && !uv;
+}
+
+static int is_battery_charging(int fsm_state)
+{
+ switch (fsm_state) {
+ case FSM_STATE_ATC_2A:
+ case FSM_STATE_ATC_2B:
+ case FSM_STATE_ON_CHG_AND_BAT_6:
+ case FSM_STATE_FAST_CHG_7:
+ case FSM_STATE_TRKL_CHG_8:
+ return 1;
+ }
+ return 0;
+}
+
+static void bms_notify(struct work_struct *work)
+{
+ struct bms_notify *n = container_of(work, struct bms_notify, work);
+
+ if (n->is_charging)
+ pm8921_bms_charging_began();
+ else
+ pm8921_bms_charging_end();
+}
+
+static enum power_supply_property pm_power_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+static char *pm_power_supplied_to[] = {
+ "battery",
+};
+
+static int pm_power_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pm8921_chg_chip *chip;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ if (psy->type == POWER_SUPPLY_TYPE_MAINS) {
+ chip = container_of(psy, struct pm8921_chg_chip,
+ dc_psy);
+ val->intval = is_dc_chg_plugged_in(chip);
+ }
+ if (psy->type == POWER_SUPPLY_TYPE_USB) {
+ chip = container_of(psy, struct pm8921_chg_chip,
+ usb_psy);
+ val->intval = is_usb_chg_plugged_in(chip);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static enum power_supply_property msm_batt_power_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static int get_prop_battery_mvolts(struct pm8921_chg_chip *chip)
+{
+ int rc;
+ struct pm8921_adc_chan_result result;
+
+ rc = pm8921_adc_read(chip->vbat_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ chip->vbat_channel, rc);
+ return rc;
+ }
+ pr_debug("mvolts phy = %lld meas = 0x%llx", result.physical,
+ result.measurement);
+ return (int)result.physical;
+}
+
+static int get_prop_batt_capacity(struct pm8921_chg_chip *chip)
+{
+ return pm8921_bms_get_percent_charge();
+}
+
+static int get_prop_batt_health(struct pm8921_chg_chip *chip)
+{
+ int temp;
+
+ temp = pm_chg_get_rt_status(chip, BATTTEMP_HOT_IRQ);
+ if (temp)
+ return POWER_SUPPLY_HEALTH_OVERHEAT;
+
+ temp = pm_chg_get_rt_status(chip, BATTTEMP_COLD_IRQ);
+ if (temp)
+ return POWER_SUPPLY_HEALTH_COLD;
+
+ return POWER_SUPPLY_HEALTH_GOOD;
+}
+
+static int get_prop_batt_present(struct pm8921_chg_chip *chip)
+{
+ return pm_chg_get_rt_status(chip, BATT_INSERTED_IRQ);
+}
+
+static int get_prop_charge_type(struct pm8921_chg_chip *chip)
+{
+ int temp;
+
+ temp = pm_chg_get_rt_status(chip, TRKLCHG_IRQ);
+ if (temp)
+ return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+
+ temp = pm_chg_get_rt_status(chip, FASTCHG_IRQ);
+ if (temp)
+ return POWER_SUPPLY_CHARGE_TYPE_FAST;
+
+ return POWER_SUPPLY_CHARGE_TYPE_NONE;
+}
+
+static int get_prop_batt_status(struct pm8921_chg_chip *chip)
+{
+ int temp = 0;
+
+ /* TODO reading the FSM state is more reliable */
+ temp = pm_chg_get_rt_status(chip, TRKLCHG_IRQ);
+
+ temp |= pm_chg_get_rt_status(chip, FASTCHG_IRQ);
+ if (temp)
+ return POWER_SUPPLY_STATUS_CHARGING;
+ /*
+ * The battery is not charging
+ * check the FET - if on battery is discharging
+ * - if off battery is isolated(full) and the system
+ * is being driven from a charger
+ */
+ temp = pm_chg_get_rt_status(chip, BATFET_IRQ);
+ if (temp)
+ return POWER_SUPPLY_STATUS_DISCHARGING;
+
+ return POWER_SUPPLY_STATUS_FULL;
+}
+
+static int pm_batt_power_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pm8921_chg_chip *chip = container_of(psy, struct pm8921_chg_chip,
+ batt_psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = get_prop_batt_status(chip);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = get_prop_charge_type(chip);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = get_prop_batt_health(chip);
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = get_prop_batt_present(chip);
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = chip->max_voltage;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = chip->min_voltage;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = get_prop_battery_mvolts(chip);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = get_prop_batt_capacity(chip);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void (*notify_vbus_state_func_ptr)(int);
+static int usb_chg_current;
+static DEFINE_SPINLOCK(vbus_lock);
+
+int pm8921_charger_register_vbus_sn(void (*callback)(int))
+{
+ pr_debug("%p\n", callback);
+ notify_vbus_state_func_ptr = callback;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pm8921_charger_register_vbus_sn);
+
+/* this is passed to the hsusb via platform_data msm_otg_pdata */
+void pm8921_charger_unregister_vbus_sn(void (*callback)(int))
+{
+ pr_debug("%p\n", callback);
+ notify_vbus_state_func_ptr = NULL;
+}
+EXPORT_SYMBOL_GPL(pm8921_charger_unregister_vbus_sn);
+
+static void notify_usb_of_the_plugin_event(int plugin)
+{
+ plugin = !!plugin;
+ if (notify_vbus_state_func_ptr) {
+ pr_debug("notifying plugin\n");
+ (*notify_vbus_state_func_ptr) (plugin);
+ } else {
+ pr_debug("unable to notify plugin\n");
+ }
+}
+
+struct usb_ma_limit_entry {
+ int usb_ma;
+ u8 chg_iusb_value;
+};
+
+static struct usb_ma_limit_entry usb_ma_table[] = {
+ {100, 0},
+ {500, 1},
+ {700, 2},
+ {850, 3},
+ {900, 4},
+ {1100, 5},
+ {1300, 6},
+ {1500, 7},
+};
+
+/* assumes vbus_lock is held */
+static void __pm8921_charger_vbus_draw(unsigned int mA)
+{
+ int i, rc;
+
+ if (mA > 0 && mA <= 2) {
+ usb_chg_current = 0;
+ rc = pm_chg_iusbmax_set(the_chip,
+ usb_ma_table[0].chg_iusb_value);
+ if (rc) {
+ pr_err("unable to set iusb to %d rc = %d\n",
+ usb_ma_table[0].chg_iusb_value, rc);
+ }
+ rc = pm_chg_usb_suspend_enable(the_chip, 1);
+ if (rc)
+ pr_err("fail to set suspend bit rc=%d\n", rc);
+ } else {
+ rc = pm_chg_usb_suspend_enable(the_chip, 0);
+ if (rc)
+ pr_err("fail to reset suspend bit rc=%d\n", rc);
+ for (i = ARRAY_SIZE(usb_ma_table) - 1; i >= 0; i--) {
+ if (usb_ma_table[i].usb_ma <= mA)
+ break;
+ }
+ if (i < 0)
+ i = 0;
+ rc = pm_chg_iusbmax_set(the_chip,
+ usb_ma_table[i].chg_iusb_value);
+ if (rc) {
+ pr_err("unable to set iusb to %d rc = %d\n",
+ usb_ma_table[i].chg_iusb_value, rc);
+ }
+ }
+}
+
+/* USB calls these to tell us how much max usb current the system can draw */
+void pm8921_charger_vbus_draw(unsigned int mA)
+{
+ unsigned long flags;
+
+ pr_debug("Enter charge=%d\n", mA);
+ spin_lock_irqsave(&vbus_lock, flags);
+ if (the_chip) {
+ __pm8921_charger_vbus_draw(mA);
+ } else {
+ /*
+ * called before pmic initialized,
+ * save this value and use it at probe
+ */
+ usb_chg_current = mA;
+ }
+ spin_unlock_irqrestore(&vbus_lock, flags);
+}
+EXPORT_SYMBOL_GPL(pm8921_charger_vbus_draw);
+
+static void handle_usb_insertion_removal(struct pm8921_chg_chip *chip)
+{
+ int usb_present;
+
+ usb_present = is_usb_chg_plugged_in(chip);
+ if (chip->usb_present ^ usb_present) {
+ notify_usb_of_the_plugin_event(usb_present);
+ chip->usb_present = usb_present;
+ power_supply_changed(&chip->usb_psy);
+ }
+}
+
+static void handle_dc_removal_insertion(struct pm8921_chg_chip *chip)
+{
+ int dc_present;
+
+ dc_present = is_dc_chg_plugged_in(chip);
+ if (chip->dc_present ^ dc_present) {
+ chip->dc_present = dc_present;
+ power_supply_changed(&chip->dc_psy);
+ }
+}
+
+static irqreturn_t usbin_valid_irq_handler(int irq, void *data)
+{
+ handle_usb_insertion_removal(data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t usbin_ov_irq_handler(int irq, void *data)
+{
+ handle_usb_insertion_removal(data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t batt_inserted_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+ int status;
+
+ status = pm_chg_get_rt_status(chip,
+ BATT_INSERTED_IRQ);
+ pr_debug("battery present=%d", status);
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+/* this interrupt used to restart charging a battery */
+static irqreturn_t vbatdet_low_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t usbin_uv_irq_handler(int irq, void *data)
+{
+ handle_usb_insertion_removal(data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vbat_ov_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chgwdog_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vcp_irq_handler(int irq, void *data)
+{
+ pr_warning("VCP triggered BATDET forced on\n");
+ pr_debug("state_changed_to=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t atcdone_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t atcfail_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chgdone_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("state_changed_to=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chgfail_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("state_changed_to=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chgstate_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+ int new_is_charging = 0, fsm_state;
+
+ pr_debug("state_changed_to=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+
+ fsm_state = pm_chg_get_fsm_state(chip);
+ new_is_charging = is_battery_charging(fsm_state);
+
+ if (chip->bms_notify.is_charging ^ new_is_charging) {
+ chip->bms_notify.is_charging = new_is_charging;
+ schedule_work(&(chip->bms_notify.work));
+ }
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t loop_change_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fastchg_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t trklchg_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t batt_removed_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+ int status;
+
+ status = pm_chg_get_rt_status(chip, BATT_REMOVED_IRQ);
+ pr_debug("battery present=%d state=%d", !status,
+ pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t batttemp_hot_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chghot_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("Chg hot fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t batttemp_cold_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("Batt cold fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t chg_gone_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("Chg gone fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t bat_temp_ok_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("batt temp ok fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ power_supply_changed(&chip->batt_psy);
+ power_supply_changed(&chip->usb_psy);
+ power_supply_changed(&chip->dc_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t coarse_det_low_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vdd_loop_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vreg_ov_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vbatdet_irq_handler(int irq, void *data)
+{
+ pr_debug("fsm_state=%d\n", pm_chg_get_fsm_state(data));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t batfet_irq_handler(int irq, void *data)
+{
+ struct pm8921_chg_chip *chip = data;
+
+ pr_debug("vreg ov\n");
+ power_supply_changed(&chip->batt_psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dcin_valid_irq_handler(int irq, void *data)
+{
+ handle_dc_removal_insertion(data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dcin_ov_irq_handler(int irq, void *data)
+{
+ handle_dc_removal_insertion(data);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dcin_uv_irq_handler(int irq, void *data)
+{
+ handle_dc_removal_insertion(data);
+ return IRQ_HANDLED;
+}
+
+static int set_disable_status_param(const char *val, struct kernel_param *kp)
+{
+ int ret;
+ struct pm8921_chg_chip *chip = the_chip;
+
+ ret = param_set_int(val, kp);
+ if (ret) {
+ pr_err("error setting value %d\n", ret);
+ return ret;
+ }
+ pr_info("factory set disable param to %d\n", charging_disabled);
+ if (chip) {
+ pm_chg_auto_enable(chip, !charging_disabled);
+ pm_chg_charge_dis(chip, charging_disabled);
+ }
+ return 0;
+}
+module_param_call(disabled, set_disable_status_param, param_get_uint,
+ &charging_disabled, 0644);
+
+static void free_irqs(struct pm8921_chg_chip *chip)
+{
+ int i;
+
+ for (i = 0; i < PM_CHG_MAX_INTS; i++)
+ if (chip->pmic_chg_irq[i]) {
+ free_irq(chip->pmic_chg_irq[i], chip);
+ chip->pmic_chg_irq[i] = 0;
+ }
+}
+
+/* determines the initial present states and notifies msm_charger */
+static void __devinit determine_initial_state(struct pm8921_chg_chip *chip)
+{
+ unsigned long flags;
+ int fsm_state;
+
+ chip->dc_present = !!is_dc_chg_plugged_in(chip);
+ chip->usb_present = !!is_usb_chg_plugged_in(chip);
+
+ notify_usb_of_the_plugin_event(chip->usb_present);
+
+ pm8921_chg_enable_irq(chip, DCIN_VALID_IRQ);
+ pm8921_chg_enable_irq(chip, USBIN_VALID_IRQ);
+ pm8921_chg_enable_irq(chip, BATT_REMOVED_IRQ);
+ pm8921_chg_enable_irq(chip, BATT_REMOVED_IRQ);
+ pm8921_chg_enable_irq(chip, CHGSTATE_IRQ);
+
+ spin_lock_irqsave(&vbus_lock, flags);
+ if (usb_chg_current) {
+ /* reissue a vbus draw call */
+ __pm8921_charger_vbus_draw(usb_chg_current);
+ }
+ spin_unlock_irqrestore(&vbus_lock, flags);
+
+ fsm_state = pm_chg_get_fsm_state(chip);
+ if (is_battery_charging(fsm_state)) {
+ chip->bms_notify.is_charging = 1;
+ pm8921_bms_charging_began();
+ }
+
+ pr_debug("usb = %d, dc = %d batt = %d state=%d\n",
+ chip->usb_present,
+ chip->dc_present,
+ get_prop_batt_present(chip),
+ fsm_state);
+}
+
+struct pm_chg_irq_init_data {
+ unsigned int irq_id;
+ char *name;
+ unsigned long flags;
+ irqreturn_t (*handler)(int, void *);
+};
+
+#define CHG_IRQ(_id, _flags, _handler) \
+{ \
+ .irq_id = _id, \
+ .name = #_id, \
+ .flags = _flags, \
+ .handler = _handler, \
+}
+struct pm_chg_irq_init_data chg_irq_data[] = {
+ CHG_IRQ(USBIN_VALID_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ usbin_valid_irq_handler),
+ CHG_IRQ(USBIN_OV_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ usbin_ov_irq_handler),
+ CHG_IRQ(BATT_INSERTED_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ batt_inserted_irq_handler),
+ CHG_IRQ(VBATDET_LOW_IRQ, IRQF_TRIGGER_RISING, vbatdet_low_irq_handler),
+ CHG_IRQ(USBIN_UV_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ usbin_uv_irq_handler),
+ CHG_IRQ(VBAT_OV_IRQ, IRQF_TRIGGER_RISING, vbat_ov_irq_handler),
+ CHG_IRQ(CHGWDOG_IRQ, IRQF_TRIGGER_RISING, chgwdog_irq_handler),
+ CHG_IRQ(VCP_IRQ, IRQF_TRIGGER_RISING, vcp_irq_handler),
+ CHG_IRQ(ATCDONE_IRQ, IRQF_TRIGGER_RISING, atcdone_irq_handler),
+ CHG_IRQ(ATCFAIL_IRQ, IRQF_TRIGGER_RISING, atcfail_irq_handler),
+ CHG_IRQ(CHGDONE_IRQ, IRQF_TRIGGER_RISING, chgdone_irq_handler),
+ CHG_IRQ(CHGFAIL_IRQ, IRQF_TRIGGER_RISING, chgfail_irq_handler),
+ CHG_IRQ(CHGSTATE_IRQ, IRQF_TRIGGER_RISING, chgstate_irq_handler),
+ CHG_IRQ(LOOP_CHANGE_IRQ, IRQF_TRIGGER_RISING, loop_change_irq_handler),
+ CHG_IRQ(FASTCHG_IRQ, IRQF_TRIGGER_RISING, fastchg_irq_handler),
+ CHG_IRQ(TRKLCHG_IRQ, IRQF_TRIGGER_RISING, trklchg_irq_handler),
+ CHG_IRQ(BATT_REMOVED_IRQ, IRQF_TRIGGER_RISING,
+ batt_removed_irq_handler),
+ CHG_IRQ(BATTTEMP_HOT_IRQ, IRQF_TRIGGER_RISING,
+ batttemp_hot_irq_handler),
+ CHG_IRQ(CHGHOT_IRQ, IRQF_TRIGGER_RISING, chghot_irq_handler),
+ CHG_IRQ(BATTTEMP_COLD_IRQ, IRQF_TRIGGER_RISING,
+ batttemp_cold_irq_handler),
+ CHG_IRQ(CHG_GONE_IRQ, IRQF_TRIGGER_RISING, chg_gone_irq_handler),
+ CHG_IRQ(BAT_TEMP_OK_IRQ, IRQF_TRIGGER_RISING, bat_temp_ok_irq_handler),
+ CHG_IRQ(COARSE_DET_LOW_IRQ, IRQF_TRIGGER_RISING,
+ coarse_det_low_irq_handler),
+ CHG_IRQ(VDD_LOOP_IRQ, IRQF_TRIGGER_RISING, vdd_loop_irq_handler),
+ CHG_IRQ(VREG_OV_IRQ, IRQF_TRIGGER_RISING, vreg_ov_irq_handler),
+ CHG_IRQ(VBATDET_IRQ, IRQF_TRIGGER_RISING, vbatdet_irq_handler),
+ CHG_IRQ(BATFET_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ batfet_irq_handler),
+ CHG_IRQ(DCIN_VALID_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dcin_valid_irq_handler),
+ CHG_IRQ(DCIN_OV_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dcin_ov_irq_handler),
+ CHG_IRQ(DCIN_UV_IRQ, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dcin_uv_irq_handler),
+};
+
+static int __devinit request_irqs(struct pm8921_chg_chip *chip,
+ struct platform_device *pdev)
+{
+ struct resource *res;
+ int ret, i;
+
+ ret = 0;
+ bitmap_fill(chip->enabled_irqs, PM_CHG_MAX_INTS);
+
+ for (i = 0; i < ARRAY_SIZE(chg_irq_data); i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+ chg_irq_data[i].name);
+ if (res == NULL) {
+ pr_err("couldn't find %s\n", chg_irq_data[i].name);
+ goto err_out;
+ }
+ ret = request_irq(res->start, chg_irq_data[i].handler,
+ chg_irq_data[i].flags,
+ chg_irq_data[i].name, chip);
+ if (ret < 0) {
+ pr_err("couldn't request %d (%s) %d\n", res->start,
+ chg_irq_data[i].name, ret);
+ goto err_out;
+ }
+ chip->pmic_chg_irq[chg_irq_data[i].irq_id] = res->start;
+ pm8921_chg_disable_irq(chip, chg_irq_data[i].irq_id);
+ }
+ return 0;
+
+err_out:
+ free_irqs(chip);
+ return -EINVAL;
+}
+
+#define ENUM_TIMER_STOP_BIT BIT(1)
+#define BOOT_DONE_BIT BIT(6)
+#define CHG_BATFET_ON_BIT BIT(3)
+#define CHG_VCP_EN BIT(0)
+#define CHG_BAT_TEMP_DIS_BIT BIT(2)
+#define SAFE_CURRENT_MA 1500
+static int __devinit pm8921_chg_hw_init(struct pm8921_chg_chip *chip)
+{
+ int rc;
+
+ rc = pm_chg_masked_write(chip, SYS_CONFIG_2,
+ BOOT_DONE_BIT, BOOT_DONE_BIT);
+ if (rc) {
+ pr_err("Failed to set BOOT_DONE_BIT rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = pm_chg_vddsafe_set(chip, chip->max_voltage);
+ if (rc) {
+ pr_err("Failed to set safe voltage to %d rc=%d\n",
+ chip->max_voltage, rc);
+ return rc;
+ }
+ rc = pm_chg_vbatdet_set(chip, chip->resume_voltage);
+ if (rc) {
+ pr_err("Failed to set vbatdet comprator voltage to %d rc=%d\n",
+ chip->resume_voltage, rc);
+ return rc;
+ }
+
+ rc = pm_chg_vddmax_set(chip, chip->max_voltage);
+ if (rc) {
+ pr_err("Failed to set max voltage to %d rc=%d\n",
+ chip->max_voltage, rc);
+ return rc;
+ }
+ rc = pm_chg_ibatsafe_set(chip, SAFE_CURRENT_MA);
+ if (rc) {
+ pr_err("Failed to set max voltage to %d rc=%d\n",
+ SAFE_CURRENT_MA, rc);
+ return rc;
+ }
+
+ /* TODO needs to be changed as per the temeperature of the battery */
+ rc = pm_chg_ibatmax_set(chip, 400);
+ if (rc) {
+ pr_err("Failed to set max current to 400 rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = pm_chg_iterm_set(chip, chip->term_current);
+ if (rc) {
+ pr_err("Failed to set term current to %d rc=%d\n",
+ chip->term_current, rc);
+ return rc;
+ }
+
+ /* Disable the ENUM TIMER */
+ rc = pm_chg_masked_write(chip, PBL_ACCESS2, ENUM_TIMER_STOP_BIT,
+ ENUM_TIMER_STOP_BIT);
+ if (rc) {
+ pr_err("Failed to set enum timer stop rc=%d\n", rc);
+ return rc;
+ }
+
+ /* init with the lowest USB current */
+ rc = pm_chg_iusbmax_set(chip, usb_ma_table[0].chg_iusb_value);
+ if (rc) {
+ pr_err("Failed to set usb max to %d rc=%d\n",
+ usb_ma_table[0].chg_iusb_value, rc);
+ return rc;
+ }
+ rc = pm_chg_disable_wd(chip);
+ if (rc) {
+ pr_err("Failed to disable wd rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = pm_chg_masked_write(chip, CHG_CNTRL_2,
+ CHG_BAT_TEMP_DIS_BIT, 0);
+ if (rc) {
+ pr_err("Failed to enable temp control chg rc=%d\n", rc);
+ return rc;
+ }
+ /* switch to a 3.2Mhz for the buck */
+ rc = pm8xxx_writeb(chip->dev->parent, CHG_BUCK_CLOCK_CTRL, 0x15);
+ if (rc) {
+ pr_err("Failed to switch buck clk rc=%d\n", rc);
+ return rc;
+ }
+
+ /* Workarounds for die 1.1 and 1.0 */
+ if (pm8xxx_get_revision(chip->dev->parent) < PM8XXX_REVISION_8921_2p0) {
+ pm8xxx_writeb(chip->dev->parent, CHG_BUCK_CTRL_TEST2, 0xF1);
+ pm8xxx_writeb(chip->dev->parent, CHG_BUCK_CTRL_TEST3, 0x8C);
+ pm8xxx_writeb(chip->dev->parent, CHG_BUCK_CTRL_TEST3, 0xCE);
+ pm8xxx_writeb(chip->dev->parent, CHG_BUCK_CTRL_TEST3, 0xD8);
+ }
+
+ rc = pm_chg_charge_dis(chip, charging_disabled);
+ if (rc) {
+ pr_err("Failed to disable CHG_CHARGE_DIS bit rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = pm_chg_auto_enable(chip, !charging_disabled);
+ if (rc) {
+ pr_err("Failed to enable charging rc=%d\n", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int get_rt_status(void *data, u64 * val)
+{
+ int i = (int)data;
+ int ret;
+
+ /* global irq number is passed in via data */
+ ret = pm_chg_get_rt_status(the_chip, i);
+ *val = ret;
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(rt_fops, get_rt_status, NULL, "%llu\n");
+
+static int get_fsm_status(void *data, u64 * val)
+{
+ u8 temp;
+
+ temp = pm_chg_get_fsm_state(the_chip);
+ *val = temp;
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fsm_fops, get_fsm_status, NULL, "%llu\n");
+
+static int get_reg(void *data, u64 * val)
+{
+ int addr = (int)data;
+ int ret;
+ u8 temp;
+
+ ret = pm8xxx_readb(the_chip->dev->parent, addr, &temp);
+ if (ret) {
+ pr_err("pm8xxx_readb to %x value =%d errored = %d\n",
+ addr, temp, ret);
+ return -EAGAIN;
+ }
+ *val = temp;
+ return 0;
+}
+
+static int set_reg(void *data, u64 val)
+{
+ int addr = (int)data;
+ int ret;
+ u8 temp;
+
+ temp = (u8) val;
+ ret = pm8xxx_writeb(the_chip->dev->parent, addr, temp);
+ if (ret) {
+ pr_err("pm8xxx_writeb to %x value =%d errored = %d\n",
+ addr, temp, ret);
+ return -EAGAIN;
+ }
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(reg_fops, get_reg, set_reg, "0x%02llx\n");
+
+static void create_debugfs_entries(struct pm8921_chg_chip *chip)
+{
+ int i;
+
+ chip->dent = debugfs_create_dir("pm8921_chg", NULL);
+
+ if (IS_ERR(chip->dent)) {
+ pr_err("pmic charger couldnt create debugfs dir\n");
+ return;
+ }
+
+ debugfs_create_file("CHG_CNTRL", 0644, chip->dent,
+ (void *)CHG_CNTRL, ®_fops);
+ debugfs_create_file("CHG_CNTRL_2", 0644, chip->dent,
+ (void *)CHG_CNTRL_2, ®_fops);
+ debugfs_create_file("CHG_CNTRL_3", 0644, chip->dent,
+ (void *)CHG_CNTRL_3, ®_fops);
+ debugfs_create_file("PBL_ACCESS1", 0644, chip->dent,
+ (void *)PBL_ACCESS1, ®_fops);
+ debugfs_create_file("PBL_ACCESS2", 0644, chip->dent,
+ (void *)PBL_ACCESS2, ®_fops);
+ debugfs_create_file("SYS_CONFIG_1", 0644, chip->dent,
+ (void *)SYS_CONFIG_1, ®_fops);
+ debugfs_create_file("SYS_CONFIG_2", 0644, chip->dent,
+ (void *)SYS_CONFIG_2, ®_fops);
+ debugfs_create_file("CHG_VDD_MAX", 0644, chip->dent,
+ (void *)CHG_VDD_MAX, ®_fops);
+ debugfs_create_file("CHG_VDD_SAFE", 0644, chip->dent,
+ (void *)CHG_VDD_SAFE, ®_fops);
+ debugfs_create_file("CHG_VBAT_DET", 0644, chip->dent,
+ (void *)CHG_VBAT_DET, ®_fops);
+ debugfs_create_file("CHG_IBAT_MAX", 0644, chip->dent,
+ (void *)CHG_IBAT_MAX, ®_fops);
+ debugfs_create_file("CHG_IBAT_SAFE", 0644, chip->dent,
+ (void *)CHG_IBAT_SAFE, ®_fops);
+ debugfs_create_file("CHG_VIN_MIN", 0644, chip->dent,
+ (void *)CHG_VIN_MIN, ®_fops);
+ debugfs_create_file("CHG_VTRICKLE", 0644, chip->dent,
+ (void *)CHG_VTRICKLE, ®_fops);
+ debugfs_create_file("CHG_ITRICKLE", 0644, chip->dent,
+ (void *)CHG_ITRICKLE, ®_fops);
+ debugfs_create_file("CHG_ITERM", 0644, chip->dent,
+ (void *)CHG_ITERM, ®_fops);
+ debugfs_create_file("CHG_TCHG_MAX", 0644, chip->dent,
+ (void *)CHG_TCHG_MAX, ®_fops);
+ debugfs_create_file("CHG_TWDOG", 0644, chip->dent,
+ (void *)CHG_TWDOG, ®_fops);
+ debugfs_create_file("CHG_TEMP_THRESH", 0644, chip->dent,
+ (void *)CHG_TEMP_THRESH, ®_fops);
+ debugfs_create_file("CHG_COMP_OVR", 0644, chip->dent,
+ (void *)CHG_COMP_OVR, ®_fops);
+ debugfs_create_file("CHG_BUCK_CTRL_TEST1", 0644, chip->dent,
+ (void *)CHG_BUCK_CTRL_TEST1, ®_fops);
+ debugfs_create_file("CHG_BUCK_CTRL_TEST2", 0644, chip->dent,
+ (void *)CHG_BUCK_CTRL_TEST2, ®_fops);
+ debugfs_create_file("CHG_BUCK_CTRL_TEST3", 0644, chip->dent,
+ (void *)CHG_BUCK_CTRL_TEST3, ®_fops);
+ debugfs_create_file("CHG_TEST", 0644, chip->dent,
+ (void *)CHG_TEST, ®_fops);
+
+ debugfs_create_file("FSM_STATE", 0644, chip->dent, NULL,
+ &fsm_fops);
+
+ for (i = 0; i < ARRAY_SIZE(chg_irq_data); i++) {
+ if (chip->pmic_chg_irq[chg_irq_data[i].irq_id])
+ debugfs_create_file(chg_irq_data[i].name, 0444,
+ chip->dent,
+ (void *)chg_irq_data[i].irq_id,
+ &rt_fops);
+ }
+}
+
+static int __devinit pm8921_charger_probe(struct platform_device *pdev)
+{
+ int rc = 0;
+ struct pm8921_chg_chip *chip;
+ const struct pm8921_charger_platform_data *pdata
+ = pdev->dev.platform_data;
+
+ if (!pdata) {
+ pr_err("missing platform data\n");
+ return -EINVAL;
+ }
+
+ chip = kzalloc(sizeof(struct pm8921_chg_chip),
+ GFP_KERNEL);
+ if (!chip) {
+ pr_err("Cannot allocate pm_chg_chip\n");
+ return -ENOMEM;
+ }
+
+ chip->dev = &pdev->dev;
+ chip->safety_time = pdata->safety_time;
+ chip->update_time = pdata->update_time;
+ chip->max_voltage = pdata->max_voltage;
+ chip->min_voltage = pdata->min_voltage;
+ chip->resume_voltage = pdata->resume_voltage;
+ chip->term_current = pdata->term_current;
+ chip->vbat_channel = pdata->charger_cdata.vbat_channel;
+
+ rc = pm8921_chg_hw_init(chip);
+ if (rc) {
+ pr_err("couldn't init hardware rc=%d\n", rc);
+ goto free_chip;
+ }
+
+ chip->usb_psy.name = "usb",
+ chip->usb_psy.type = POWER_SUPPLY_TYPE_USB,
+ chip->usb_psy.supplied_to = pm_power_supplied_to,
+ chip->usb_psy.num_supplicants = ARRAY_SIZE(pm_power_supplied_to),
+ chip->usb_psy.properties = pm_power_props,
+ chip->usb_psy.num_properties = ARRAY_SIZE(pm_power_props),
+ chip->usb_psy.get_property = pm_power_get_property,
+
+ chip->dc_psy.name = "ac",
+ chip->dc_psy.type = POWER_SUPPLY_TYPE_MAINS,
+ chip->dc_psy.supplied_to = pm_power_supplied_to,
+ chip->dc_psy.num_supplicants = ARRAY_SIZE(pm_power_supplied_to),
+ chip->dc_psy.properties = pm_power_props,
+ chip->dc_psy.num_properties = ARRAY_SIZE(pm_power_props),
+ chip->dc_psy.get_property = pm_power_get_property,
+
+ chip->batt_psy.name = "battery",
+ chip->batt_psy.type = POWER_SUPPLY_TYPE_BATTERY,
+ chip->batt_psy.properties = msm_batt_power_props,
+ chip->batt_psy.num_properties = ARRAY_SIZE(msm_batt_power_props),
+ chip->batt_psy.get_property = pm_batt_power_get_property,
+
+ rc = power_supply_register(chip->dev, &chip->usb_psy);
+ if (rc < 0) {
+ pr_err("power_supply_register usb failed rc = %d\n", rc);
+ goto free_irq;
+ }
+
+ rc = power_supply_register(chip->dev, &chip->dc_psy);
+ if (rc < 0) {
+ pr_err("power_supply_register dc failed rc = %d\n", rc);
+ goto unregister_usb;
+ }
+
+ rc = power_supply_register(chip->dev, &chip->batt_psy);
+ if (rc < 0) {
+ pr_err("power_supply_register batt failed rc = %d\n", rc);
+ goto unregister_dc;
+ }
+
+ rc = request_irqs(chip, pdev);
+ if (rc) {
+ pr_err("couldn't register interrupts rc=%d\n", rc);
+ goto unregister_batt;
+ }
+
+ platform_set_drvdata(pdev, chip);
+ the_chip = chip;
+ create_debugfs_entries(chip);
+
+ INIT_WORK(&chip->bms_notify.work, bms_notify);
+ /* determine what state the charger is in */
+ determine_initial_state(chip);
+
+ return 0;
+
+free_irq:
+ free_irqs(chip);
+unregister_batt:
+ power_supply_unregister(&chip->batt_psy);
+unregister_dc:
+ power_supply_unregister(&chip->dc_psy);
+unregister_usb:
+ power_supply_unregister(&chip->usb_psy);
+free_chip:
+ kfree(chip);
+ return rc;
+}
+
+static int __devexit pm8921_charger_remove(struct platform_device *pdev)
+{
+ struct pm8921_chg_chip *chip = platform_get_drvdata(pdev);
+
+ free_irqs(chip);
+ platform_set_drvdata(pdev, NULL);
+ the_chip = NULL;
+ kfree(chip);
+ return 0;
+}
+
+static struct platform_driver pm8921_charger_driver = {
+ .probe = pm8921_charger_probe,
+ .remove = __devexit_p(pm8921_charger_remove),
+ .driver = {
+ .name = PM8921_CHARGER_DEV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init pm8921_charger_init(void)
+{
+ return platform_driver_register(&pm8921_charger_driver);
+}
+
+static void __exit pm8921_charger_exit(void)
+{
+ platform_driver_unregister(&pm8921_charger_driver);
+}
+
+late_initcall(pm8921_charger_init);
+module_exit(pm8921_charger_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PMIC8921 charger/battery driver");
+MODULE_VERSION("1.0");
+MODULE_ALIAS("platform:" PM8921_CHARGER_DEV_NAME);