| /* Copyright (c) 2014, Sony Mobile Communications Inc. |
| * |
| * 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. |
| * |
| * This driver is for the multi-block Switch-Mode Battery Charger and Boost |
| * (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an |
| * integrated, single-cell lithium-ion battery charger. |
| * |
| * Sub-components: |
| * - Charger core |
| * - Buck |
| * - DC charge-path |
| * - USB charge-path |
| * - Battery interface |
| * - Boost (not implemented) |
| * - Misc |
| * - HF-Buck |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/power_supply.h> |
| #include <linux/regmap.h> |
| #include <linux/slab.h> |
| #include <linux/extcon.h> |
| |
| #define SMBB_CHG_VMAX 0x040 |
| #define SMBB_CHG_VSAFE 0x041 |
| #define SMBB_CHG_CFG 0x043 |
| #define SMBB_CHG_IMAX 0x044 |
| #define SMBB_CHG_ISAFE 0x045 |
| #define SMBB_CHG_VIN_MIN 0x047 |
| #define SMBB_CHG_CTRL 0x049 |
| #define CTRL_EN BIT(7) |
| #define SMBB_CHG_VBAT_WEAK 0x052 |
| #define SMBB_CHG_IBAT_TERM_CHG 0x05b |
| #define IBAT_TERM_CHG_IEOC BIT(7) |
| #define IBAT_TERM_CHG_IEOC_BMS BIT(7) |
| #define IBAT_TERM_CHG_IEOC_CHG 0 |
| #define SMBB_CHG_VBAT_DET 0x05d |
| #define SMBB_CHG_TCHG_MAX_EN 0x060 |
| #define TCHG_MAX_EN BIT(7) |
| #define SMBB_CHG_WDOG_TIME 0x062 |
| #define SMBB_CHG_WDOG_EN 0x065 |
| #define WDOG_EN BIT(7) |
| |
| #define SMBB_BUCK_REG_MODE 0x174 |
| #define BUCK_REG_MODE BIT(0) |
| #define BUCK_REG_MODE_VBAT BIT(0) |
| #define BUCK_REG_MODE_VSYS 0 |
| |
| #define SMBB_BAT_PRES_STATUS 0x208 |
| #define PRES_STATUS_BAT_PRES BIT(7) |
| #define SMBB_BAT_TEMP_STATUS 0x209 |
| #define TEMP_STATUS_OK BIT(7) |
| #define TEMP_STATUS_HOT BIT(6) |
| #define SMBB_BAT_BTC_CTRL 0x249 |
| #define BTC_CTRL_COMP_EN BIT(7) |
| #define BTC_CTRL_COLD_EXT BIT(1) |
| #define BTC_CTRL_HOT_EXT_N BIT(0) |
| |
| #define SMBB_USB_IMAX 0x344 |
| #define SMBB_USB_ENUM_TIMER_STOP 0x34e |
| #define ENUM_TIMER_STOP BIT(0) |
| #define SMBB_USB_SEC_ACCESS 0x3d0 |
| #define SEC_ACCESS_MAGIC 0xa5 |
| #define SMBB_USB_REV_BST 0x3ed |
| #define REV_BST_CHG_GONE BIT(7) |
| |
| #define SMBB_DC_IMAX 0x444 |
| |
| #define SMBB_MISC_REV2 0x601 |
| #define SMBB_MISC_BOOT_DONE 0x642 |
| #define BOOT_DONE BIT(7) |
| |
| #define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */ |
| #define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */ |
| #define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */ |
| #define STATUS_BAT_OK BIT(3) /* Battery temp OK */ |
| #define STATUS_BAT_PRESENT BIT(4) /* Battery is present */ |
| #define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */ |
| #define STATUS_CHG_TRKL BIT(6) /* Trickle charging */ |
| #define STATUS_CHG_FAST BIT(7) /* Fast charging */ |
| #define STATUS_CHG_GONE BIT(8) /* No charger is connected */ |
| |
| enum smbb_attr { |
| ATTR_BAT_ISAFE, |
| ATTR_BAT_IMAX, |
| ATTR_USBIN_IMAX, |
| ATTR_DCIN_IMAX, |
| ATTR_BAT_VSAFE, |
| ATTR_BAT_VMAX, |
| ATTR_BAT_VMIN, |
| ATTR_CHG_VDET, |
| ATTR_VIN_MIN, |
| _ATTR_CNT, |
| }; |
| |
| struct smbb_charger { |
| unsigned int revision; |
| unsigned int addr; |
| struct device *dev; |
| struct extcon_dev *edev; |
| |
| bool dc_disabled; |
| bool jeita_ext_temp; |
| unsigned long status; |
| struct mutex statlock; |
| |
| unsigned int attr[_ATTR_CNT]; |
| |
| struct power_supply *usb_psy; |
| struct power_supply *dc_psy; |
| struct power_supply *bat_psy; |
| struct regmap *regmap; |
| }; |
| |
| static const unsigned int smbb_usb_extcon_cable[] = { |
| EXTCON_USB, |
| EXTCON_NONE, |
| }; |
| |
| static int smbb_vbat_weak_fn(unsigned int index) |
| { |
| return 2100000 + index * 100000; |
| } |
| |
| static int smbb_vin_fn(unsigned int index) |
| { |
| if (index > 42) |
| return 5600000 + (index - 43) * 200000; |
| return 3400000 + index * 50000; |
| } |
| |
| static int smbb_vmax_fn(unsigned int index) |
| { |
| return 3240000 + index * 10000; |
| } |
| |
| static int smbb_vbat_det_fn(unsigned int index) |
| { |
| return 3240000 + index * 20000; |
| } |
| |
| static int smbb_imax_fn(unsigned int index) |
| { |
| if (index < 2) |
| return 100000 + index * 50000; |
| return index * 100000; |
| } |
| |
| static int smbb_bat_imax_fn(unsigned int index) |
| { |
| return index * 50000; |
| } |
| |
| static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int)) |
| { |
| unsigned int widx; |
| unsigned int sel; |
| |
| for (widx = sel = 0; (*fn)(widx) <= val; ++widx) |
| sel = widx; |
| |
| return sel; |
| } |
| |
| static const struct smbb_charger_attr { |
| const char *name; |
| unsigned int reg; |
| unsigned int safe_reg; |
| unsigned int max; |
| unsigned int min; |
| unsigned int fail_ok; |
| int (*hw_fn)(unsigned int); |
| } smbb_charger_attrs[] = { |
| [ATTR_BAT_ISAFE] = { |
| .name = "qcom,fast-charge-safe-current", |
| .reg = SMBB_CHG_ISAFE, |
| .max = 3000000, |
| .min = 200000, |
| .hw_fn = smbb_bat_imax_fn, |
| .fail_ok = 1, |
| }, |
| [ATTR_BAT_IMAX] = { |
| .name = "qcom,fast-charge-current-limit", |
| .reg = SMBB_CHG_IMAX, |
| .safe_reg = SMBB_CHG_ISAFE, |
| .max = 3000000, |
| .min = 200000, |
| .hw_fn = smbb_bat_imax_fn, |
| }, |
| [ATTR_DCIN_IMAX] = { |
| .name = "qcom,dc-current-limit", |
| .reg = SMBB_DC_IMAX, |
| .max = 2500000, |
| .min = 100000, |
| .hw_fn = smbb_imax_fn, |
| }, |
| [ATTR_BAT_VSAFE] = { |
| .name = "qcom,fast-charge-safe-voltage", |
| .reg = SMBB_CHG_VSAFE, |
| .max = 5000000, |
| .min = 3240000, |
| .hw_fn = smbb_vmax_fn, |
| .fail_ok = 1, |
| }, |
| [ATTR_BAT_VMAX] = { |
| .name = "qcom,fast-charge-high-threshold-voltage", |
| .reg = SMBB_CHG_VMAX, |
| .safe_reg = SMBB_CHG_VSAFE, |
| .max = 5000000, |
| .min = 3240000, |
| .hw_fn = smbb_vmax_fn, |
| }, |
| [ATTR_BAT_VMIN] = { |
| .name = "qcom,fast-charge-low-threshold-voltage", |
| .reg = SMBB_CHG_VBAT_WEAK, |
| .max = 3600000, |
| .min = 2100000, |
| .hw_fn = smbb_vbat_weak_fn, |
| }, |
| [ATTR_CHG_VDET] = { |
| .name = "qcom,auto-recharge-threshold-voltage", |
| .reg = SMBB_CHG_VBAT_DET, |
| .max = 5000000, |
| .min = 3240000, |
| .hw_fn = smbb_vbat_det_fn, |
| }, |
| [ATTR_VIN_MIN] = { |
| .name = "qcom,minimum-input-voltage", |
| .reg = SMBB_CHG_VIN_MIN, |
| .max = 9600000, |
| .min = 4200000, |
| .hw_fn = smbb_vin_fn, |
| }, |
| [ATTR_USBIN_IMAX] = { |
| .name = "usb-charge-current-limit", |
| .reg = SMBB_USB_IMAX, |
| .max = 2500000, |
| .min = 100000, |
| .hw_fn = smbb_imax_fn, |
| }, |
| }; |
| |
| static int smbb_charger_attr_write(struct smbb_charger *chg, |
| enum smbb_attr which, unsigned int val) |
| { |
| const struct smbb_charger_attr *prop; |
| unsigned int wval; |
| unsigned int out; |
| int rc; |
| |
| prop = &smbb_charger_attrs[which]; |
| |
| if (val > prop->max || val < prop->min) { |
| dev_err(chg->dev, "value out of range for %s [%u:%u]\n", |
| prop->name, prop->min, prop->max); |
| return -EINVAL; |
| } |
| |
| if (prop->safe_reg) { |
| rc = regmap_read(chg->regmap, |
| chg->addr + prop->safe_reg, &wval); |
| if (rc) { |
| dev_err(chg->dev, |
| "unable to read safe value for '%s'\n", |
| prop->name); |
| return rc; |
| } |
| |
| wval = prop->hw_fn(wval); |
| |
| if (val > wval) { |
| dev_warn(chg->dev, |
| "%s above safe value, clamping at %u\n", |
| prop->name, wval); |
| val = wval; |
| } |
| } |
| |
| wval = smbb_hw_lookup(val, prop->hw_fn); |
| |
| rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval); |
| if (rc) { |
| dev_err(chg->dev, "unable to update %s", prop->name); |
| return rc; |
| } |
| out = prop->hw_fn(wval); |
| if (out != val) { |
| dev_warn(chg->dev, |
| "%s inaccurate, rounded to %u\n", |
| prop->name, out); |
| } |
| |
| dev_dbg(chg->dev, "%s <= %d\n", prop->name, out); |
| |
| chg->attr[which] = out; |
| |
| return 0; |
| } |
| |
| static int smbb_charger_attr_read(struct smbb_charger *chg, |
| enum smbb_attr which) |
| { |
| const struct smbb_charger_attr *prop; |
| unsigned int val; |
| int rc; |
| |
| prop = &smbb_charger_attrs[which]; |
| |
| rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val); |
| if (rc) { |
| dev_err(chg->dev, "failed to read %s\n", prop->name); |
| return rc; |
| } |
| val = prop->hw_fn(val); |
| dev_dbg(chg->dev, "%s => %d\n", prop->name, val); |
| |
| chg->attr[which] = val; |
| |
| return 0; |
| } |
| |
| static int smbb_charger_attr_parse(struct smbb_charger *chg, |
| enum smbb_attr which) |
| { |
| const struct smbb_charger_attr *prop; |
| unsigned int val; |
| int rc; |
| |
| prop = &smbb_charger_attrs[which]; |
| |
| rc = of_property_read_u32(chg->dev->of_node, prop->name, &val); |
| if (rc == 0) { |
| rc = smbb_charger_attr_write(chg, which, val); |
| if (!rc || !prop->fail_ok) |
| return rc; |
| } |
| return smbb_charger_attr_read(chg, which); |
| } |
| |
| static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag) |
| { |
| bool state; |
| int ret; |
| |
| ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state); |
| if (ret < 0) { |
| dev_err(chg->dev, "failed to read irq line\n"); |
| return; |
| } |
| |
| mutex_lock(&chg->statlock); |
| if (state) |
| chg->status |= flag; |
| else |
| chg->status &= ~flag; |
| mutex_unlock(&chg->statlock); |
| |
| dev_dbg(chg->dev, "status = %03lx\n", chg->status); |
| } |
| |
| static irqreturn_t smbb_usb_valid_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID); |
| extcon_set_cable_state_(chg->edev, EXTCON_USB, |
| chg->status & STATUS_USBIN_VALID); |
| power_supply_changed(chg->usb_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_dc_valid_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID); |
| if (!chg->dc_disabled) |
| power_supply_changed(chg->dc_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_bat_temp_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| unsigned int val; |
| int rc; |
| |
| rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val); |
| if (rc) |
| return IRQ_HANDLED; |
| |
| mutex_lock(&chg->statlock); |
| if (val & TEMP_STATUS_OK) { |
| chg->status |= STATUS_BAT_OK; |
| } else { |
| chg->status &= ~STATUS_BAT_OK; |
| if (val & TEMP_STATUS_HOT) |
| chg->status |= STATUS_BAT_HOT; |
| } |
| mutex_unlock(&chg->statlock); |
| |
| power_supply_changed(chg->bat_psy); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_bat_present_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT); |
| power_supply_changed(chg->bat_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_chg_done_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_CHG_DONE); |
| power_supply_changed(chg->bat_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_chg_gone_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_CHG_GONE); |
| power_supply_changed(chg->bat_psy); |
| power_supply_changed(chg->usb_psy); |
| if (!chg->dc_disabled) |
| power_supply_changed(chg->dc_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_chg_fast_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_CHG_FAST); |
| power_supply_changed(chg->bat_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data) |
| { |
| struct smbb_charger *chg = _data; |
| |
| smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL); |
| power_supply_changed(chg->bat_psy); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static const struct smbb_irq { |
| const char *name; |
| irqreturn_t (*handler)(int, void *); |
| } smbb_charger_irqs[] = { |
| { "chg-done", smbb_chg_done_handler }, |
| { "chg-fast", smbb_chg_fast_handler }, |
| { "chg-trkl", smbb_chg_trkl_handler }, |
| { "bat-temp-ok", smbb_bat_temp_handler }, |
| { "bat-present", smbb_bat_present_handler }, |
| { "chg-gone", smbb_chg_gone_handler }, |
| { "usb-valid", smbb_usb_valid_handler }, |
| { "dc-valid", smbb_dc_valid_handler }, |
| }; |
| |
| static int smbb_usbin_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| int rc = 0; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| mutex_lock(&chg->statlock); |
| val->intval = !(chg->status & STATUS_CHG_GONE) && |
| (chg->status & STATUS_USBIN_VALID); |
| mutex_unlock(&chg->statlock); |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
| val->intval = chg->attr[ATTR_USBIN_IMAX]; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: |
| val->intval = 2500000; |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_usbin_set_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| int rc; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
| rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX, |
| val->intval); |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_dcin_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| int rc = 0; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| mutex_lock(&chg->statlock); |
| val->intval = !(chg->status & STATUS_CHG_GONE) && |
| (chg->status & STATUS_DCIN_VALID); |
| mutex_unlock(&chg->statlock); |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
| val->intval = chg->attr[ATTR_DCIN_IMAX]; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: |
| val->intval = 2500000; |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_dcin_set_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| int rc; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: |
| rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX, |
| val->intval); |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_charger_writable_property(struct power_supply *psy, |
| enum power_supply_property psp) |
| { |
| return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT; |
| } |
| |
| static int smbb_battery_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| unsigned long status; |
| int rc = 0; |
| |
| mutex_lock(&chg->statlock); |
| status = chg->status; |
| mutex_unlock(&chg->statlock); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| if (status & STATUS_CHG_GONE) |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID))) |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (status & STATUS_CHG_DONE) |
| val->intval = POWER_SUPPLY_STATUS_FULL; |
| else if (!(status & STATUS_BAT_OK)) |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL)) |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| else /* everything is ok for charging, but we are not... */ |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| break; |
| case POWER_SUPPLY_PROP_HEALTH: |
| if (status & STATUS_BAT_OK) |
| val->intval = POWER_SUPPLY_HEALTH_GOOD; |
| else if (status & STATUS_BAT_HOT) |
| val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
| else |
| val->intval = POWER_SUPPLY_HEALTH_COLD; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_TYPE: |
| if (status & STATUS_CHG_FAST) |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; |
| else if (status & STATUS_CHG_TRKL) |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
| else |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = !!(status & STATUS_BAT_PRESENT); |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_MAX: |
| val->intval = chg->attr[ATTR_BAT_IMAX]; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
| val->intval = chg->attr[ATTR_BAT_VMAX]; |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| /* this charger is a single-cell lithium-ion battery charger |
| * only. If you hook up some other technology, there will be |
| * fireworks. |
| */ |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| val->intval = 3000000; /* single-cell li-ion low end */ |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_battery_set_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| struct smbb_charger *chg = power_supply_get_drvdata(psy); |
| int rc; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CURRENT_MAX: |
| rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval); |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
| rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval); |
| break; |
| default: |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int smbb_battery_writable_property(struct power_supply *psy, |
| enum power_supply_property psp) |
| { |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CURRENT_MAX: |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| static enum power_supply_property smbb_charger_properties[] = { |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, |
| POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, |
| }; |
| |
| static enum power_supply_property smbb_battery_properties[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_CHARGE_TYPE, |
| POWER_SUPPLY_PROP_CURRENT_MAX, |
| POWER_SUPPLY_PROP_VOLTAGE_MAX, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| }; |
| |
| static const struct reg_off_mask_default { |
| unsigned int offset; |
| unsigned int mask; |
| unsigned int value; |
| unsigned int rev_mask; |
| } smbb_charger_setup[] = { |
| /* The bootloader is supposed to set this... make sure anyway. */ |
| { SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE }, |
| |
| /* Disable software timer */ |
| { SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 }, |
| |
| /* Clear and disable watchdog */ |
| { SMBB_CHG_WDOG_TIME, 0xff, 160 }, |
| { SMBB_CHG_WDOG_EN, WDOG_EN, 0 }, |
| |
| /* Use charger based EoC detection */ |
| { SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG }, |
| |
| /* Disable GSM PA load adjustment. |
| * The PA signal is incorrectly connected on v2. |
| */ |
| { SMBB_CHG_CFG, 0xff, 0x00, BIT(3) }, |
| |
| /* Use VBAT (not VSYS) to compensate for IR drop during fast charging */ |
| { SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT }, |
| |
| /* Enable battery temperature comparators */ |
| { SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN }, |
| |
| /* Stop USB enumeration timer */ |
| { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, |
| |
| #if 0 /* FIXME supposedly only to disable hardware ARB termination */ |
| { SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC }, |
| { SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE }, |
| #endif |
| |
| /* Stop USB enumeration timer, again */ |
| { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, |
| |
| /* Enable charging */ |
| { SMBB_CHG_CTRL, CTRL_EN, CTRL_EN }, |
| }; |
| |
| static char *smbb_bif[] = { "smbb-bif" }; |
| |
| static const struct power_supply_desc bat_psy_desc = { |
| .name = "smbb-bif", |
| .type = POWER_SUPPLY_TYPE_BATTERY, |
| .properties = smbb_battery_properties, |
| .num_properties = ARRAY_SIZE(smbb_battery_properties), |
| .get_property = smbb_battery_get_property, |
| .set_property = smbb_battery_set_property, |
| .property_is_writeable = smbb_battery_writable_property, |
| }; |
| |
| static const struct power_supply_desc usb_psy_desc = { |
| .name = "smbb-usbin", |
| .type = POWER_SUPPLY_TYPE_USB, |
| .properties = smbb_charger_properties, |
| .num_properties = ARRAY_SIZE(smbb_charger_properties), |
| .get_property = smbb_usbin_get_property, |
| .set_property = smbb_usbin_set_property, |
| .property_is_writeable = smbb_charger_writable_property, |
| }; |
| |
| static const struct power_supply_desc dc_psy_desc = { |
| .name = "smbb-dcin", |
| .type = POWER_SUPPLY_TYPE_MAINS, |
| .properties = smbb_charger_properties, |
| .num_properties = ARRAY_SIZE(smbb_charger_properties), |
| .get_property = smbb_dcin_get_property, |
| .set_property = smbb_dcin_set_property, |
| .property_is_writeable = smbb_charger_writable_property, |
| }; |
| |
| static int smbb_charger_probe(struct platform_device *pdev) |
| { |
| struct power_supply_config bat_cfg = {}; |
| struct power_supply_config usb_cfg = {}; |
| struct power_supply_config dc_cfg = {}; |
| struct smbb_charger *chg; |
| int rc, i; |
| |
| chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL); |
| if (!chg) |
| return -ENOMEM; |
| |
| chg->dev = &pdev->dev; |
| mutex_init(&chg->statlock); |
| |
| chg->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
| if (!chg->regmap) { |
| dev_err(&pdev->dev, "failed to locate regmap\n"); |
| return -ENODEV; |
| } |
| |
| rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr); |
| if (rc) { |
| dev_err(&pdev->dev, "missing or invalid 'reg' property\n"); |
| return rc; |
| } |
| |
| rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision); |
| if (rc) { |
| dev_err(&pdev->dev, "unable to read revision\n"); |
| return rc; |
| } |
| |
| chg->revision += 1; |
| if (chg->revision != 2 && chg->revision != 3) { |
| dev_err(&pdev->dev, "v1 hardware not supported\n"); |
| return -ENODEV; |
| } |
| dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision); |
| |
| chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc"); |
| |
| for (i = 0; i < _ATTR_CNT; ++i) { |
| rc = smbb_charger_attr_parse(chg, i); |
| if (rc) { |
| dev_err(&pdev->dev, "failed to parse/apply settings\n"); |
| return rc; |
| } |
| } |
| |
| bat_cfg.drv_data = chg; |
| bat_cfg.of_node = pdev->dev.of_node; |
| chg->bat_psy = devm_power_supply_register(&pdev->dev, |
| &bat_psy_desc, |
| &bat_cfg); |
| if (IS_ERR(chg->bat_psy)) { |
| dev_err(&pdev->dev, "failed to register battery\n"); |
| return PTR_ERR(chg->bat_psy); |
| } |
| |
| usb_cfg.drv_data = chg; |
| usb_cfg.supplied_to = smbb_bif; |
| usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); |
| chg->usb_psy = devm_power_supply_register(&pdev->dev, |
| &usb_psy_desc, |
| &usb_cfg); |
| if (IS_ERR(chg->usb_psy)) { |
| dev_err(&pdev->dev, "failed to register USB power supply\n"); |
| return PTR_ERR(chg->usb_psy); |
| } |
| |
| chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable); |
| if (IS_ERR(chg->edev)) { |
| dev_err(&pdev->dev, "failed to allocate extcon device\n"); |
| return -ENOMEM; |
| } |
| |
| rc = devm_extcon_dev_register(&pdev->dev, chg->edev); |
| if (rc < 0) { |
| dev_err(&pdev->dev, "failed to register extcon device\n"); |
| return rc; |
| } |
| |
| if (!chg->dc_disabled) { |
| dc_cfg.drv_data = chg; |
| dc_cfg.supplied_to = smbb_bif; |
| dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); |
| chg->dc_psy = devm_power_supply_register(&pdev->dev, |
| &dc_psy_desc, |
| &dc_cfg); |
| if (IS_ERR(chg->dc_psy)) { |
| dev_err(&pdev->dev, "failed to register DC power supply\n"); |
| return PTR_ERR(chg->dc_psy); |
| } |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) { |
| int irq; |
| |
| irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name); |
| if (irq < 0) { |
| dev_err(&pdev->dev, "failed to get irq '%s'\n", |
| smbb_charger_irqs[i].name); |
| return irq; |
| } |
| |
| smbb_charger_irqs[i].handler(irq, chg); |
| |
| rc = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| smbb_charger_irqs[i].handler, IRQF_ONESHOT, |
| smbb_charger_irqs[i].name, chg); |
| if (rc) { |
| dev_err(&pdev->dev, "failed to request irq '%s'\n", |
| smbb_charger_irqs[i].name); |
| return rc; |
| } |
| } |
| |
| chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node, |
| "qcom,jeita-extended-temp-range"); |
| |
| /* Set temperature range to [35%:70%] or [25%:80%] accordingly */ |
| rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL, |
| BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N, |
| chg->jeita_ext_temp ? |
| BTC_CTRL_COLD_EXT : |
| BTC_CTRL_HOT_EXT_N); |
| if (rc) { |
| dev_err(&pdev->dev, |
| "unable to set %s temperature range\n", |
| chg->jeita_ext_temp ? "JEITA extended" : "normal"); |
| return rc; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) { |
| const struct reg_off_mask_default *r = &smbb_charger_setup[i]; |
| |
| if (r->rev_mask & BIT(chg->revision)) |
| continue; |
| |
| rc = regmap_update_bits(chg->regmap, chg->addr + r->offset, |
| r->mask, r->value); |
| if (rc) { |
| dev_err(&pdev->dev, |
| "unable to initializing charging, bailing\n"); |
| return rc; |
| } |
| } |
| |
| platform_set_drvdata(pdev, chg); |
| |
| return 0; |
| } |
| |
| static int smbb_charger_remove(struct platform_device *pdev) |
| { |
| struct smbb_charger *chg; |
| |
| chg = platform_get_drvdata(pdev); |
| |
| regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id smbb_charger_id_table[] = { |
| { .compatible = "qcom,pm8941-charger" }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, smbb_charger_id_table); |
| |
| static struct platform_driver smbb_charger_driver = { |
| .probe = smbb_charger_probe, |
| .remove = smbb_charger_remove, |
| .driver = { |
| .name = "qcom-smbb", |
| .of_match_table = smbb_charger_id_table, |
| }, |
| }; |
| module_platform_driver(smbb_charger_driver); |
| |
| MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver"); |
| MODULE_LICENSE("GPL v2"); |