From f75c93e6046750645e275657f9637fcde6c07f16 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= Date: Sun, 7 Nov 2021 20:09:02 +0100 Subject: [PATCH 309/389] power: supply: rk818-charger: Implement charger driver for RK818 PMIC For now this driver is just meant to watch Type-C power supply and apply current limits to RK818, to not overload the Type-C partner. Signed-off-by: Ondrej Jirman --- drivers/mfd/rk808.c | 1 + drivers/power/supply/Kconfig | 8 + drivers/power/supply/Makefile | 1 + drivers/power/supply/rk818_charger.c | 650 +++++++++++++++++++++++++++ 4 files changed, 660 insertions(+) create mode 100644 drivers/power/supply/rk818_charger.c diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c index 6f6eaa8d7044..480736033005 100644 --- a/drivers/mfd/rk808.c +++ b/drivers/mfd/rk808.c @@ -221,6 +221,7 @@ static const struct mfd_cell rk818s[] = { { .name = "rk808-clkout", }, { .name = "rk808-regulator", }, { .name = "rk818-battery", .of_compatible = "rockchip,rk818-battery", }, + { .name = "rk818-charger", .of_compatible = "rockchip,rk818-charger", }, { .name = "rk808-rtc", .num_resources = ARRAY_SIZE(rtc_resources), diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index a138e81193a2..d3bdf262ae01 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -926,4 +926,12 @@ config BATTERY_RK818 If you say yes here you will get support for the battery of RK818 PMIC. This driver can give support for Rk818 Battery Charge Interface. +config CHARGER_RK818 + bool "RK818 Charger driver" + depends on MFD_RK808 + default n + help + If you say yes here you will get support for the charger of RK818 PMIC. + This driver can give support for Rk818 Charger Interface. + endif # POWER_SUPPLY diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index dcea0e755e7f..3b9ea8374538 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_BATTERY_SURFACE) += surface_battery.o obj-$(CONFIG_CHARGER_SURFACE) += surface_charger.o obj-$(CONFIG_BATTERY_UG3105) += ug3105_battery.o obj-$(CONFIG_BATTERY_RK818) += rk818_battery.o +obj-$(CONFIG_CHARGER_RK818) += rk818_charger.o diff --git a/drivers/power/supply/rk818_charger.c b/drivers/power/supply/rk818_charger.c new file mode 100644 index 000000000000..00fe5d8f4785 --- /dev/null +++ b/drivers/power/supply/rk818_charger.c @@ -0,0 +1,650 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * rk818 usb power driver + * + * Copyright (c) 2021 Ondřej Jirman + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#define RK818_CHG_STS_MASK (7u << 4) /* charger status */ +#define RK818_CHG_STS_NONE (0u << 4) +#define RK818_CHG_STS_WAKEUP_CUR (1u << 4) +#define RK818_CHG_STS_TRICKLE_CUR (2u << 4) +#define RK818_CHG_STS_CC_OR_CV (3u << 4) +#define RK818_CHG_STS_TERMINATED (4u << 4) +#define RK818_CHG_STS_USB_OV (5u << 4) +#define RK818_CHG_STS_BAT_TEMP_FAULT (6u << 4) +#define RK818_CHG_STS_TIMEOUT (7u << 4) + +/* RK818_SUP_STS_REG */ +#define RK818_SUP_STS_USB_VLIM_EN BIT(3) /* input voltage limit enable */ +#define RK818_SUP_STS_USB_ILIM_EN BIT(2) /* input current limit enable */ +#define RK818_SUP_STS_USB_EXS BIT(1) /* USB power connected */ +#define RK818_SUP_STS_USB_EFF BIT(0) /* USB fault */ + +/* RK818_USB_CTRL_REG */ +#define RK818_USB_CTRL_USB_ILIM_MASK (0xfu) +#define RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET 4 +#define RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK (0x7u << 4) + +/* RK818_CHRG_CTRL_REG1 */ +#define RK818_CHRG_CTRL_REG1_CHRG_EN BIT(7) +#define RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET 4 +#define RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK (0x7u << 4) +#define RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET 0 +#define RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK (0xfu << 0) + +/* RK818_CHRG_CTRL_REG3 */ +#define RK818_CHRG_CTRL_REG3_CHRG_TERM_DIGITAL BIT(5) + +struct rk818_charger { + struct device *dev; + struct rk808 *rk818; + struct regmap *regmap; + + struct power_supply *usb_psy; + struct power_supply *charger_psy; +}; + +// {{{ USB supply + +static int rk818_usb_set_input_current_max(struct rk818_charger *cg, + int val) +{ + int ret; + unsigned reg; + + if (val < 450000) + reg = 1; + else if (val < 850000) + reg = 0; + else if (val < 1000000) + reg = 2; + else if (val < 3000000) + reg = 3 + (val - 1000000) / 250000; + else + reg = 11; + + ret = regmap_update_bits(cg->regmap, RK818_USB_CTRL_REG, + RK818_USB_CTRL_USB_ILIM_MASK, reg); + if (ret) + dev_err(cg->dev, + "USB input current limit setting failed (%d)\n", ret); + + return ret; +} + +static int rk818_usb_get_input_current_max(struct rk818_charger *cg, + int *val) +{ + unsigned reg; + int ret; + + ret = regmap_read(cg->regmap, RK818_USB_CTRL_REG, ®); + if (ret) { + dev_err(cg->dev, + "USB input current limit getting failed (%d)\n", ret); + return ret; + } + + reg &= RK818_USB_CTRL_USB_ILIM_MASK; + if (reg == 0) + *val = 450000; + else if (reg == 1) + *val = 80000; + else if (reg == 2) + *val = 850000; + else if (reg < 11) + *val = 1000000 + (reg - 3) * 250000; + else + *val = 3000000; + + return 0; +} + +static int rk818_usb_set_input_voltage_min(struct rk818_charger *cg, + int val) +{ + unsigned reg; + int ret; + + if (val < 2780000) + reg = 0; + else if (val < 3270000) + reg = (val - 2780000) / 70000; + else + reg = 7; + + ret = regmap_update_bits(cg->regmap, RK818_USB_CTRL_REG, + RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK, + reg << RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET); + if (ret) + dev_err(cg->dev, + "USB input voltage limit setting failed (%d)\n", ret); + + return ret; +} + +static int rk818_usb_get_input_voltage_min(struct rk818_charger *cg, + int *val) +{ + unsigned reg; + int ret; + + ret = regmap_read(cg->regmap, RK818_USB_CTRL_REG, ®); + if (ret) { + dev_err(cg->dev, + "USB input voltage limit getting failed (%d)\n", ret); + return ret; + } + + reg &= RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK; + reg >>= RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET; + + *val = 2780000 + (reg * 70000); + + return 0; +} + +static int rk818_usb_power_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct rk818_charger *cg = power_supply_get_drvdata(psy); + unsigned reg; + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_PRESENT: + ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, ®); + if (ret) + return ret; + + val->intval = !!(reg & RK818_SUP_STS_USB_EXS); + break; + + case POWER_SUPPLY_PROP_HEALTH: + ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, ®); + if (ret) + return ret; + + if (!(reg & RK818_SUP_STS_USB_EXS)) { + val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; + } else if (reg & RK818_SUP_STS_USB_EFF) { + val->intval = POWER_SUPPLY_HEALTH_GOOD; + } else { + val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + } + + break; + + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + return rk818_usb_get_input_voltage_min(cg, &val->intval); + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + return rk818_usb_get_input_current_max(cg, &val->intval); + + default: + return -EINVAL; + } + + return 0; +} + +static int rk818_usb_power_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct rk818_charger *cg = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + return rk818_usb_set_input_voltage_min(cg, val->intval); + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + return rk818_usb_set_input_current_max(cg, val->intval); + + default: + return -EINVAL; + } +} + +static int rk818_usb_power_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + return 1; + + default: + return 0; + } +} + +/* Sync the input-current-limit with our parent supply (if we have one) */ +static void rk818_usb_power_external_power_changed(struct power_supply *psy) +{ + struct rk818_charger *cg = power_supply_get_drvdata(psy); + union power_supply_propval val; + int ret; + + ret = power_supply_get_property_from_supplier(cg->usb_psy, + POWER_SUPPLY_PROP_CURRENT_MAX, + &val); + if (ret) + return; + + if (val.intval < 500000) + val.intval = 500000; + + rk818_usb_power_set_property(cg->usb_psy, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + &val); +} + +static enum power_supply_property rk818_usb_power_props[] = { + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, +}; + +static const struct power_supply_desc rk818_usb_desc = { + .name = "rk818-usb", + .type = POWER_SUPPLY_TYPE_USB, + .properties = rk818_usb_power_props, + .num_properties = ARRAY_SIZE(rk818_usb_power_props), + .property_is_writeable = rk818_usb_power_prop_writeable, + .get_property = rk818_usb_power_get_property, + .set_property = rk818_usb_power_set_property, + .external_power_changed = rk818_usb_power_external_power_changed, +}; + +// }}} +// {{{ Charger supply + +static int rk818_charger_set_current_max(struct rk818_charger *cg, int val) +{ + unsigned reg; + int ret; + + if (val < 1000000) + reg = 0; + else if (val < 3000000) + reg = (val - 1000000) / 200000; + else + reg = 10; + + ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1, + RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK, + reg << RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET); + if (ret) + dev_err(cg->dev, + "Charging max current setting failed (%d)\n", ret); + + return ret; +} + +static int rk818_charger_get_current_max(struct rk818_charger *cg, int *val) +{ + unsigned reg; + int ret; + + ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, ®); + if (ret) { + dev_err(cg->dev, + "Charging max current getting failed (%d)\n", ret); + return ret; + } + + reg &= RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK; + reg >>= RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET; + + *val = 1000000 + reg * 200000; + + return 0; +} + +static int rk818_charger_set_voltage_max(struct rk818_charger *cg, int val) +{ + unsigned reg; + int ret; + + if (val < 4050000) + reg = 0; + else if (val < 4350000) + reg = (val - 4050000) / 50000; + else + reg = 6; + + ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1, + RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK, + reg << RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET); + if (ret) + dev_err(cg->dev, + "Charging end voltage setting failed (%d)\n", ret); + + return ret; +} + +static int rk818_charger_get_voltage_max(struct rk818_charger *cg, int *val) +{ + unsigned reg; + int ret; + + ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, ®); + if (ret) { + dev_err(cg->dev, + "Charging end voltage getting failed (%d)\n", ret); + return ret; + } + + reg &= RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK; + reg >>= RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET; + + *val = 4050000 + reg * 50000; + + return 0; +} + +static int rk818_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct rk818_charger *cg = power_supply_get_drvdata(psy); + unsigned reg; + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, ®); + if (ret) { + dev_err(cg->dev, "failed to read the charger state (%d)\n", ret); + return ret; + } + + val->intval = !!(reg & RK818_CHRG_CTRL_REG1_CHRG_EN); + break; + + case POWER_SUPPLY_PROP_STATUS: + ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, ®); + if (ret) + return ret; + + switch (reg & RK818_CHG_STS_MASK) { + case RK818_CHG_STS_WAKEUP_CUR: + case RK818_CHG_STS_TRICKLE_CUR: + case RK818_CHG_STS_CC_OR_CV: + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + case RK818_CHG_STS_TERMINATED: + default: + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + } + + break; + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, ®); + if (ret) + return ret; + + switch (reg & RK818_CHG_STS_MASK) { + case RK818_CHG_STS_WAKEUP_CUR: + case RK818_CHG_STS_TRICKLE_CUR: + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + case RK818_CHG_STS_CC_OR_CV: + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case RK818_CHG_STS_TERMINATED: + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + default: + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + break; + } + + break; + + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: + ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG2, ®); + if (ret) + return ret; + + val->intval = 100000 + ((reg >> 6) & 3) * 50000; + break; + + case POWER_SUPPLY_PROP_HEALTH: + ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, ®); + if (ret) + return ret; + + switch (reg & RK818_CHG_STS_MASK) { + case RK818_CHG_STS_USB_OV: + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + break; + case RK818_CHG_STS_BAT_TEMP_FAULT: + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; + break; + case RK818_CHG_STS_TIMEOUT: + val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + break; + default: + val->intval = POWER_SUPPLY_HEALTH_GOOD; + break; + } + + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + return rk818_charger_get_voltage_max(cg, &val->intval); + + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: + ret = rk818_charger_get_current_max(cg, &val->intval); + val->intval /= 10; + return ret; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + return rk818_charger_get_current_max(cg, &val->intval); + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + val->intval = 4350000; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + val->intval = 3000000; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int rk818_charger_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct rk818_charger *cg = power_supply_get_drvdata(psy); + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1, + RK818_CHRG_CTRL_REG1_CHRG_EN, + val->intval ? RK818_CHRG_CTRL_REG1_CHRG_EN : 0); + if (ret) + dev_err(cg->dev, "failed to setup the charger (%d)\n", ret); + + return ret; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + return rk818_charger_set_voltage_max(cg, val->intval); + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + return rk818_charger_set_current_max(cg, val->intval); + + default: + return -EINVAL; + } +} + +static int rk818_charger_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + case POWER_SUPPLY_PROP_ONLINE: + return 1; + + default: + return 0; + } +} + +static enum power_supply_property rk818_charger_props[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, + POWER_SUPPLY_PROP_PRECHARGE_CURRENT, +}; + +/* + * TODO: This functionality should be in a battery driver/supply, but that one + * is such a mess, I don't want to touch it now. Let's have a separate supply + * for controlling the charger for now, and a prayer for the poor soul that + * will have to understand and clean up the battery driver. + */ +static const struct power_supply_desc rk818_charger_desc = { + .name = "rk818-charger", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = rk818_charger_props, + .num_properties = ARRAY_SIZE(rk818_charger_props), + .property_is_writeable = rk818_charger_prop_writeable, + .get_property = rk818_charger_get_property, + .set_property = rk818_charger_set_property, +}; + +// }}} + +static int rk818_charger_probe(struct platform_device *pdev) +{ + struct rk808 *rk818 = dev_get_drvdata(pdev->dev.parent); + struct power_supply_config psy_cfg = { }; + struct device *dev = &pdev->dev; + struct rk818_charger *cg; + int ret; + + cg = devm_kzalloc(dev, sizeof(*cg), GFP_KERNEL); + if (!cg) + return -ENOMEM; + + cg->rk818 = rk818; + cg->dev = dev; + cg->regmap = rk818->regmap; + platform_set_drvdata(pdev, cg); + + psy_cfg.drv_data = cg; + psy_cfg.of_node = dev->of_node; + + cg->usb_psy = devm_power_supply_register(dev, &rk818_usb_desc, + &psy_cfg); + if (IS_ERR(cg->usb_psy)) + return dev_err_probe(dev, PTR_ERR(cg->usb_psy), + "register usb power supply fail\n"); + + cg->charger_psy = devm_power_supply_register(dev, &rk818_charger_desc, + &psy_cfg); + if (IS_ERR(cg->charger_psy)) + return dev_err_probe(dev, PTR_ERR(cg->charger_psy), + "register charger power supply fail\n"); + + /* disable voltage limit and enable input current limit */ + ret = regmap_update_bits(cg->regmap, RK818_SUP_STS_REG, + RK818_SUP_STS_USB_ILIM_EN | RK818_SUP_STS_USB_VLIM_EN, + RK818_SUP_STS_USB_ILIM_EN); + if (ret) + dev_warn(cg->dev, "failed to enable input current limit (%d)\n", ret); + + /* make sure analog control loop is enabled */ + ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG3, + RK818_CHRG_CTRL_REG3_CHRG_TERM_DIGITAL, + 0); + if (ret) + dev_warn(cg->dev, "failed to enable analog control loop (%d)\n", ret); + + /* enable charger and set some reasonable limits on each boot */ + ret = regmap_write(cg->regmap, RK818_CHRG_CTRL_REG1, + RK818_CHRG_CTRL_REG1_CHRG_EN + | (1) /* 1.2A */ + | (5 << 4) /* 4.3V */); + if (ret) + dev_warn(cg->dev, "failed to enable charger (%d)\n", ret); + + rk818_usb_power_external_power_changed(cg->usb_psy); + + return 0; +} + +static int rk818_charger_remove(struct platform_device *pdev) +{ + //struct rk818_charger *cg = platform_get_drvdata(pdev); + + return 0; +} + +static void rk818_charger_shutdown(struct platform_device *pdev) +{ +} + +static int rk818_charger_suspend(struct platform_device *pdev, + pm_message_t state) +{ + return 0; +} + +static int rk818_charger_resume(struct platform_device *pdev) +{ + return 0; +} + +static const struct of_device_id rk818_charger_of_match[] = { + { .compatible = "rockchip,rk818-charger", }, + { }, +}; + +static struct platform_driver rk818_charger_driver = { + .probe = rk818_charger_probe, + .remove = rk818_charger_remove, + .suspend = rk818_charger_suspend, + .resume = rk818_charger_resume, + .shutdown = rk818_charger_shutdown, + .driver = { + .name = "rk818-charger", + .of_match_table = rk818_charger_of_match, + }, +}; + +module_platform_driver(rk818_charger_driver); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:rk818-charger"); +MODULE_AUTHOR("Ondřej Jirman "); -- 2.35.3