--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * STMicroelectronics STUSB160x Type-C controller family driver
+ *
+ * Copyright (C) 2020, STMicroelectronics
+ * Author(s): Amelie Delaunay <amelie.delaunay@st.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/role.h>
+#include <linux/usb/typec.h>
+
+#define STUSB160X_ALERT_STATUS 0x0B /* RC */
+#define STUSB160X_ALERT_STATUS_MASK_CTRL 0x0C /* RW */
+#define STUSB160X_CC_CONNECTION_STATUS_TRANS 0x0D /* RC */
+#define STUSB160X_CC_CONNECTION_STATUS 0x0E /* RO */
+#define STUSB160X_MONITORING_STATUS_TRANS 0x0F /* RC */
+#define STUSB160X_MONITORING_STATUS 0x10 /* RO */
+#define STUSB160X_CC_OPERATION_STATUS 0x11 /* RO */
+#define STUSB160X_HW_FAULT_STATUS_TRANS 0x12 /* RC */
+#define STUSB160X_HW_FAULT_STATUS 0x13 /* RO */
+#define STUSB160X_CC_CAPABILITY_CTRL 0x18 /* RW */
+#define STUSB160X_CC_VCONN_SWITCH_CTRL 0x1E /* RW */
+#define STUSB160X_VCONN_MONITORING_CTRL 0x20 /* RW */
+#define STUSB160X_VBUS_MONITORING_RANGE_CTRL 0x22 /* RW */
+#define STUSB160X_RESET_CTRL 0x23 /* RW */
+#define STUSB160X_VBUS_DISCHARGE_TIME_CTRL 0x25 /* RW */
+#define STUSB160X_VBUS_DISCHARGE_STATUS 0x26 /* RO */
+#define STUSB160X_VBUS_ENABLE_STATUS 0x27 /* RO */
+#define STUSB160X_CC_POWER_MODE_CTRL 0x28 /* RW */
+#define STUSB160X_VBUS_MONITORING_CTRL 0x2E /* RW */
+#define STUSB1600_REG_MAX 0x2F /* RO - Reserved */
+
+/* STUSB160X_ALERT_STATUS/STUSB160X_ALERT_STATUS_MASK_CTRL bitfields */
+#define STUSB160X_HW_FAULT BIT(4)
+#define STUSB160X_MONITORING BIT(5)
+#define STUSB160X_CC_CONNECTION BIT(6)
+#define STUSB160X_ALL_ALERTS GENMASK(6, 4)
+
+/* STUSB160X_CC_CONNECTION_STATUS_TRANS bitfields */
+#define STUSB160X_CC_ATTACH_TRANS BIT(0)
+
+/* STUSB160X_CC_CONNECTION_STATUS bitfields */
+#define STUSB160X_CC_ATTACH BIT(0)
+#define STUSB160X_CC_VCONN_SUPPLY BIT(1)
+#define STUSB160X_CC_DATA_ROLE(s) (!!((s) & BIT(2)))
+#define STUSB160X_CC_POWER_ROLE(s) (!!((s) & BIT(3)))
+#define STUSB160X_CC_ATTACHED_MODE GENMASK(7, 5)
+
+/* STUSB160X_MONITORING_STATUS_TRANS bitfields */
+#define STUSB160X_VCONN_PRESENCE_TRANS BIT(0)
+#define STUSB160X_VBUS_PRESENCE_TRANS BIT(1)
+#define STUSB160X_VBUS_VSAFE0V_TRANS BIT(2)
+#define STUSB160X_VBUS_VALID_TRANS BIT(3)
+
+/* STUSB160X_MONITORING_STATUS bitfields */
+#define STUSB160X_VCONN_PRESENCE BIT(0)
+#define STUSB160X_VBUS_PRESENCE BIT(1)
+#define STUSB160X_VBUS_VSAFE0V BIT(2)
+#define STUSB160X_VBUS_VALID BIT(3)
+
+/* STUSB160X_CC_OPERATION_STATUS bitfields */
+#define STUSB160X_TYPEC_FSM_STATE GENMASK(4, 0)
+#define STUSB160X_SINK_POWER_STATE GENMASK(6, 5)
+#define STUSB160X_CC_ATTACHED BIT(7)
+
+/* STUSB160X_HW_FAULT_STATUS_TRANS bitfields */
+#define STUSB160X_VCONN_SW_OVP_FAULT_TRANS BIT(0)
+#define STUSB160X_VCONN_SW_OCP_FAULT_TRANS BIT(1)
+#define STUSB160X_VCONN_SW_RVP_FAULT_TRANS BIT(2)
+#define STUSB160X_VPU_VALID_TRANS BIT(4)
+#define STUSB160X_VPU_OVP_FAULT_TRANS BIT(5)
+#define STUSB160X_THERMAL_FAULT BIT(7)
+
+/* STUSB160X_HW_FAULT_STATUS bitfields */
+#define STUSB160X_VCONN_SW_OVP_FAULT_CC2 BIT(0)
+#define STUSB160X_VCONN_SW_OVP_FAULT_CC1 BIT(1)
+#define STUSB160X_VCONN_SW_OCP_FAULT_CC2 BIT(2)
+#define STUSB160X_VCONN_SW_OCP_FAULT_CC1 BIT(3)
+#define STUSB160X_VCONN_SW_RVP_FAULT_CC2 BIT(4)
+#define STUSB160X_VCONN_SW_RVP_FAULT_CC1 BIT(5)
+#define STUSB160X_VPU_VALID BIT(6)
+#define STUSB160X_VPU_OVP_FAULT BIT(7)
+
+/* STUSB160X_CC_CAPABILITY_CTRL bitfields */
+#define STUSB160X_CC_VCONN_SUPPLY_EN BIT(0)
+#define STUSB160X_CC_VCONN_DISCHARGE_EN BIT(4)
+#define STUSB160X_CC_CURRENT_ADVERTISED GENMASK(7, 6)
+
+/* STUSB160X_VCONN_SWITCH_CTRL bitfields */
+#define STUSB160X_CC_VCONN_SWITCH_ILIM GENMASK(3, 0)
+
+/* STUSB160X_VCONN_MONITORING_CTRL bitfields */
+#define STUSB160X_VCONN_UVLO_THRESHOLD BIT(6)
+#define STUSB160X_VCONN_MONITORING_EN BIT(7)
+
+/* STUSB160X_VBUS_MONITORING_RANGE_CTRL bitfields */
+#define STUSB160X_SHIFT_LOW_VBUS_LIMIT GENMASK(3, 0)
+#define STUSB160X_SHIFT_HIGH_VBUS_LIMIT GENMASK(7, 4)
+
+/* STUSB160X_RESET_CTRL bitfields */
+#define STUSB160X_SW_RESET_EN BIT(0)
+
+/* STUSB160X_VBUS_DISCHARGE_TIME_CTRL bitfields */
+#define STUSBXX02_VBUS_DISCHARGE_TIME_TO_PDO GENMASK(3, 0)
+#define STUSB160X_VBUS_DISCHARGE_TIME_TO_0V GENMASK(7, 4)
+
+/* STUSB160X_VBUS_DISCHARGE_STATUS bitfields */
+#define STUSB160X_VBUS_DISCHARGE_EN BIT(7)
+
+/* STUSB160X_VBUS_ENABLE_STATUS bitfields */
+#define STUSB160X_VBUS_SOURCE_EN BIT(0)
+#define STUSB160X_VBUS_SINK_EN BIT(1)
+
+/* STUSB160X_CC_POWER_MODE_CTRL bitfields */
+#define STUSB160X_CC_POWER_MODE GENMASK(2, 0)
+
+/* STUSB160X_VBUS_MONITORING_CTRL bitfields */
+#define STUSB160X_VDD_UVLO_DISABLE BIT(0)
+#define STUSB160X_VBUS_VSAFE0V_THRESHOLD GENMASK(2, 1)
+#define STUSB160X_VBUS_RANGE_DISABLE BIT(4)
+#define STUSB160X_VDD_OVLO_DISABLE BIT(6)
+
+enum stusb160x_pwr_mode {
+ SOURCE_WITH_ACCESSORY,
+ SINK_WITH_ACCESSORY,
+ SINK_WITHOUT_ACCESSORY,
+ DUAL_WITH_ACCESSORY,
+ DUAL_WITH_ACCESSORY_AND_TRY_SRC,
+ DUAL_WITH_ACCESSORY_AND_TRY_SNK,
+};
+
+enum stusb160x_attached_mode {
+ NO_DEVICE_ATTACHED,
+ SINK_ATTACHED,
+ SOURCE_ATTACHED,
+ DEBUG_ACCESSORY_ATTACHED,
+ AUDIO_ACCESSORY_ATTACHED,
+};
+
+struct stusb160x {
+ struct device *dev;
+ struct regmap *regmap;
+ struct regulator *vdd_supply;
+ struct regulator *vsys_supply;
+ struct regulator *vconn_supply;
+ struct regulator *main_supply;
+
+ struct typec_port *port;
+ struct typec_capability capability;
+ struct typec_partner *partner;
+
+ enum typec_port_type port_type;
+ enum typec_pwr_opmode pwr_opmode;
+ bool vbus_on;
+
+ struct usb_role_switch *role_sw;
+};
+
+static bool stusb160x_reg_writeable(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case STUSB160X_ALERT_STATUS_MASK_CTRL:
+ case STUSB160X_CC_CAPABILITY_CTRL:
+ case STUSB160X_CC_VCONN_SWITCH_CTRL:
+ case STUSB160X_VCONN_MONITORING_CTRL:
+ case STUSB160X_VBUS_MONITORING_RANGE_CTRL:
+ case STUSB160X_RESET_CTRL:
+ case STUSB160X_VBUS_DISCHARGE_TIME_CTRL:
+ case STUSB160X_CC_POWER_MODE_CTRL:
+ case STUSB160X_VBUS_MONITORING_CTRL:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool stusb160x_reg_readable(struct device *dev, unsigned int reg)
+{
+ if (reg <= 0x0A ||
+ (reg >= 0x14 && reg <= 0x17) ||
+ (reg >= 0x19 && reg <= 0x1D) ||
+ (reg >= 0x29 && reg <= 0x2D) ||
+ (reg == 0x1F || reg == 0x21 || reg == 0x24 || reg == 0x2F))
+ return false;
+ else
+ return true;
+}
+
+static bool stusb160x_reg_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case STUSB160X_ALERT_STATUS:
+ case STUSB160X_CC_CONNECTION_STATUS_TRANS:
+ case STUSB160X_CC_CONNECTION_STATUS:
+ case STUSB160X_MONITORING_STATUS_TRANS:
+ case STUSB160X_MONITORING_STATUS:
+ case STUSB160X_CC_OPERATION_STATUS:
+ case STUSB160X_HW_FAULT_STATUS_TRANS:
+ case STUSB160X_HW_FAULT_STATUS:
+ case STUSB160X_VBUS_DISCHARGE_STATUS:
+ case STUSB160X_VBUS_ENABLE_STATUS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool stusb160x_reg_precious(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case STUSB160X_ALERT_STATUS:
+ case STUSB160X_CC_CONNECTION_STATUS_TRANS:
+ case STUSB160X_MONITORING_STATUS_TRANS:
+ case STUSB160X_HW_FAULT_STATUS_TRANS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config stusb1600_regmap_config = {
+ .reg_bits = 8,
+ .reg_stride = 1,
+ .val_bits = 8,
+ .max_register = STUSB1600_REG_MAX,
+ .writeable_reg = stusb160x_reg_writeable,
+ .readable_reg = stusb160x_reg_readable,
+ .volatile_reg = stusb160x_reg_volatile,
+ .precious_reg = stusb160x_reg_precious,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static bool stusb160x_get_vconn(struct stusb160x *chip)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(chip->regmap, STUSB160X_CC_CAPABILITY_CTRL, &val);
+ if (ret) {
+ dev_err(chip->dev, "Unable to get Vconn status: %d\n", ret);
+ return false;
+ }
+
+ return !!FIELD_GET(STUSB160X_CC_VCONN_SUPPLY_EN, val);
+}
+
+static int stusb160x_set_vconn(struct stusb160x *chip, bool on)
+{
+ int ret;
+
+ /* Manage VCONN input supply */
+ if (chip->vconn_supply) {
+ if (on) {
+ ret = regulator_enable(chip->vconn_supply);
+ if (ret) {
+ dev_err(chip->dev,
+ "failed to enable vconn supply: %d\n",
+ ret);
+ return ret;
+ }
+ } else {
+ regulator_disable(chip->vconn_supply);
+ }
+ }
+
+ /* Manage VCONN monitoring and power path */
+ ret = regmap_update_bits(chip->regmap, STUSB160X_VCONN_MONITORING_CTRL,
+ STUSB160X_VCONN_MONITORING_EN,
+ on ? STUSB160X_VCONN_MONITORING_EN : 0);
+ if (ret)
+ goto vconn_reg_disable;
+
+ return 0;
+
+vconn_reg_disable:
+ if (chip->vconn_supply && on)
+ regulator_disable(chip->vconn_supply);
+
+ return ret;
+}
+
+static enum typec_pwr_opmode stusb160x_get_pwr_opmode(struct stusb160x *chip)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(chip->regmap, STUSB160X_CC_CAPABILITY_CTRL, &val);
+ if (ret) {
+ dev_err(chip->dev, "Unable to get pwr opmode: %d\n", ret);
+ return TYPEC_PWR_MODE_USB;
+ }
+
+ return FIELD_GET(STUSB160X_CC_CURRENT_ADVERTISED, val);
+}
+
+static enum typec_accessory stusb160x_get_accessory(u32 status)
+{
+ enum stusb160x_attached_mode mode;
+
+ mode = FIELD_GET(STUSB160X_CC_ATTACHED_MODE, status);
+
+ switch (mode) {
+ case DEBUG_ACCESSORY_ATTACHED:
+ return TYPEC_ACCESSORY_DEBUG;
+ case AUDIO_ACCESSORY_ATTACHED:
+ return TYPEC_ACCESSORY_AUDIO;
+ default:
+ return TYPEC_ACCESSORY_NONE;
+ }
+}
+
+static enum typec_role stusb160x_get_vconn_role(u32 status)
+{
+ if (FIELD_GET(STUSB160X_CC_VCONN_SUPPLY, status))
+ return TYPEC_SOURCE;
+
+ return TYPEC_SINK;
+}
+
+static void stusb160x_set_data_role(struct stusb160x *chip,
+ enum typec_data_role data_role,
+ bool attached)
+{
+ enum usb_role usb_role = USB_ROLE_NONE;
+
+ if (attached) {
+ if (data_role == TYPEC_HOST)
+ usb_role = USB_ROLE_HOST;
+ else
+ usb_role = USB_ROLE_DEVICE;
+ }
+
+ usb_role_switch_set_role(chip->role_sw, usb_role);
+ typec_set_data_role(chip->port, data_role);
+}
+
+static int stusb160x_attach(struct stusb160x *chip, u32 status)
+{
+ struct typec_partner_desc desc;
+ int ret;
+
+ if ((STUSB160X_CC_POWER_ROLE(status) == TYPEC_SOURCE) &&
+ chip->vdd_supply) {
+ ret = regulator_enable(chip->vdd_supply);
+ if (ret) {
+ dev_err(chip->dev,
+ "Failed to enable Vbus supply: %d\n", ret);
+ return ret;
+ }
+ chip->vbus_on = true;
+ }
+
+ desc.usb_pd = false;
+ desc.accessory = stusb160x_get_accessory(status);
+ desc.identity = NULL;
+
+ chip->partner = typec_register_partner(chip->port, &desc);
+ if (IS_ERR(chip->partner)) {
+ ret = PTR_ERR(chip->partner);
+ goto vbus_disable;
+ }
+
+ typec_set_pwr_role(chip->port, STUSB160X_CC_POWER_ROLE(status));
+ typec_set_pwr_opmode(chip->port, stusb160x_get_pwr_opmode(chip));
+ typec_set_vconn_role(chip->port, stusb160x_get_vconn_role(status));
+ stusb160x_set_data_role(chip, STUSB160X_CC_DATA_ROLE(status), true);
+
+ return 0;
+
+vbus_disable:
+ if (chip->vbus_on) {
+ regulator_disable(chip->vdd_supply);
+ chip->vbus_on = false;
+ }
+
+ return ret;
+}
+
+static void stusb160x_detach(struct stusb160x *chip, u32 status)
+{
+ typec_unregister_partner(chip->partner);
+ chip->partner = NULL;
+
+ typec_set_pwr_role(chip->port, STUSB160X_CC_POWER_ROLE(status));
+ typec_set_pwr_opmode(chip->port, TYPEC_PWR_MODE_USB);
+ typec_set_vconn_role(chip->port, stusb160x_get_vconn_role(status));
+ stusb160x_set_data_role(chip, STUSB160X_CC_DATA_ROLE(status), false);
+
+ if (chip->vbus_on) {
+ regulator_disable(chip->vdd_supply);
+ chip->vbus_on = false;
+ }
+}
+
+static irqreturn_t stusb160x_irq_handler(int irq, void *data)
+{
+ struct stusb160x *chip = data;
+ u32 pending, trans, status;
+ int ret;
+
+ ret = regmap_read(chip->regmap, STUSB160X_ALERT_STATUS, &pending);
+ if (ret)
+ goto err;
+
+ if (pending & STUSB160X_CC_CONNECTION) {
+ ret = regmap_read(chip->regmap,
+ STUSB160X_CC_CONNECTION_STATUS_TRANS, &trans);
+ if (ret)
+ goto err;
+ ret = regmap_read(chip->regmap,
+ STUSB160X_CC_CONNECTION_STATUS, &status);
+ if (ret)
+ goto err;
+
+ if (trans & STUSB160X_CC_ATTACH_TRANS) {
+ if (status & STUSB160X_CC_ATTACH) {
+ ret = stusb160x_attach(chip, status);
+ if (ret)
+ goto err;
+ } else {
+ stusb160x_detach(chip, status);
+ }
+ }
+ }
+err:
+ return IRQ_HANDLED;
+}
+
+static int stusb160x_irq_init(struct stusb160x *chip, int irq)
+{
+ u32 status;
+ int ret;
+
+ ret = regmap_read(chip->regmap,
+ STUSB160X_CC_CONNECTION_STATUS, &status);
+ if (ret)
+ return ret;
+
+ if (status & STUSB160X_CC_ATTACH) {
+ ret = stusb160x_attach(chip, status);
+ if (ret)
+ dev_err(chip->dev, "attach failed: %d\n", ret);
+ }
+
+ ret = devm_request_threaded_irq(chip->dev, irq, NULL,
+ stusb160x_irq_handler, IRQF_ONESHOT,
+ dev_name(chip->dev), chip);
+ if (ret)
+ goto partner_unregister;
+
+ /* Unmask CC_CONNECTION events */
+ ret = regmap_write_bits(chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL,
+ STUSB160X_CC_CONNECTION, 0);
+ if (ret)
+ goto partner_unregister;
+
+ return 0;
+
+partner_unregister:
+ if (chip->partner) {
+ typec_unregister_partner(chip->partner);
+ chip->partner = NULL;
+ }
+
+ return ret;
+}
+
+static int stusb160x_chip_init(struct stusb160x *chip)
+{
+ u32 val;
+ int ret;
+
+ /* Change the default Type-C power mode */
+ if (chip->port_type == TYPEC_PORT_SRC)
+ ret = regmap_update_bits(chip->regmap,
+ STUSB160X_CC_POWER_MODE_CTRL,
+ STUSB160X_CC_POWER_MODE,
+ SOURCE_WITH_ACCESSORY);
+ else if (chip->port_type == TYPEC_PORT_SNK)
+ ret = regmap_update_bits(chip->regmap,
+ STUSB160X_CC_POWER_MODE_CTRL,
+ STUSB160X_CC_POWER_MODE,
+ SINK_WITH_ACCESSORY);
+ else /* (chip->port_type == TYPEC_PORT_DRP) */
+ ret = regmap_update_bits(chip->regmap,
+ STUSB160X_CC_POWER_MODE_CTRL,
+ STUSB160X_CC_POWER_MODE,
+ DUAL_WITH_ACCESSORY);
+ if (ret)
+ return ret;
+
+ if (chip->port_type == TYPEC_PORT_SNK)
+ goto skip_src;
+
+ /* Change the default Type-C Source power operation mode capability */
+ ret = regmap_update_bits(chip->regmap, STUSB160X_CC_CAPABILITY_CTRL,
+ STUSB160X_CC_CURRENT_ADVERTISED,
+ FIELD_PREP(STUSB160X_CC_CURRENT_ADVERTISED,
+ chip->pwr_opmode));
+ if (ret)
+ return ret;
+
+ /* Manage Type-C Source Vconn supply */
+ if (stusb160x_get_vconn(chip)) {
+ ret = stusb160x_set_vconn(chip, true);
+ if (ret)
+ return ret;
+ }
+
+skip_src:
+ /* Mask all events interrupts - to be unmasked with interrupt support */
+ ret = regmap_update_bits(chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL,
+ STUSB160X_ALL_ALERTS, STUSB160X_ALL_ALERTS);
+ if (ret)
+ return ret;
+
+ /* Read status at least once to clear any stale interrupts */
+ regmap_read(chip->regmap, STUSB160X_ALERT_STATUS, &val);
+ regmap_read(chip->regmap, STUSB160X_CC_CONNECTION_STATUS_TRANS, &val);
+ regmap_read(chip->regmap, STUSB160X_MONITORING_STATUS_TRANS, &val);
+ regmap_read(chip->regmap, STUSB160X_HW_FAULT_STATUS_TRANS, &val);
+
+ return 0;
+}
+
+static int stusb160x_get_fw_caps(struct stusb160x *chip,
+ struct fwnode_handle *fwnode)
+{
+ const char *cap_str;
+ int ret;
+
+ chip->capability.fwnode = fwnode;
+
+ /*
+ * Supported port type can be configured through device tree
+ * else it is read from chip registers in stusb160x_get_caps.
+ */
+ ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
+ if (!ret) {
+ chip->port_type = typec_find_port_power_role(cap_str);
+ if (chip->port_type < 0) {
+ ret = chip->port_type;
+ return ret;
+ }
+ }
+ chip->capability.type = chip->port_type;
+
+ /* Skip DRP/Source capabilities in case of Sink only */
+ if (chip->port_type == TYPEC_PORT_SNK)
+ return 0;
+
+ if (chip->port_type == TYPEC_PORT_DRP)
+ chip->capability.prefer_role = TYPEC_SINK;
+
+ /*
+ * Supported power operation mode can be configured through device tree
+ * else it is read from chip registers in stusb160x_get_caps.
+ */
+ ret = fwnode_property_read_string(fwnode, "power-opmode", &cap_str);
+ if (!ret) {
+ chip->pwr_opmode = typec_find_pwr_opmode(cap_str);
+ /* Power delivery not yet supported */
+ if (chip->pwr_opmode < 0 ||
+ chip->pwr_opmode == TYPEC_PWR_MODE_PD) {
+ ret = chip->pwr_opmode < 0 ? chip->pwr_opmode : -EINVAL;
+ dev_err(chip->dev, "bad power operation mode: %d\n",
+ chip->pwr_opmode);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int stusb160x_get_caps(struct stusb160x *chip)
+{
+ enum typec_port_type *type = &chip->capability.type;
+ enum typec_port_data *data = &chip->capability.data;
+ enum typec_accessory *accessory = chip->capability.accessory;
+ u32 val;
+ int ret;
+
+ chip->capability.revision = USB_TYPEC_REV_1_2;
+
+ ret = regmap_read(chip->regmap, STUSB160X_CC_POWER_MODE_CTRL, &val);
+ if (ret)
+ return ret;
+
+ switch (FIELD_GET(STUSB160X_CC_POWER_MODE, val)) {
+ case SOURCE_WITH_ACCESSORY:
+ *type = TYPEC_PORT_SRC;
+ *data = TYPEC_PORT_DFP;
+ *accessory++ = TYPEC_ACCESSORY_AUDIO;
+ *accessory++ = TYPEC_ACCESSORY_DEBUG;
+ break;
+ case SINK_WITH_ACCESSORY:
+ *type = TYPEC_PORT_SNK;
+ *data = TYPEC_PORT_UFP;
+ *accessory++ = TYPEC_ACCESSORY_AUDIO;
+ *accessory++ = TYPEC_ACCESSORY_DEBUG;
+ break;
+ case SINK_WITHOUT_ACCESSORY:
+ *type = TYPEC_PORT_SNK;
+ *data = TYPEC_PORT_UFP;
+ break;
+ case DUAL_WITH_ACCESSORY:
+ case DUAL_WITH_ACCESSORY_AND_TRY_SRC:
+ case DUAL_WITH_ACCESSORY_AND_TRY_SNK:
+ *type = TYPEC_PORT_DRP;
+ *data = TYPEC_PORT_DRD;
+ *accessory++ = TYPEC_ACCESSORY_AUDIO;
+ *accessory++ = TYPEC_ACCESSORY_DEBUG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ chip->port_type = *type;
+ chip->pwr_opmode = stusb160x_get_pwr_opmode(chip);
+
+ return 0;
+}
+
+static const struct of_device_id stusb160x_of_match[] = {
+ { .compatible = "st,stusb1600", .data = &stusb1600_regmap_config},
+ {},
+};
+
+static int stusb160x_probe(struct i2c_client *client)
+{
+ struct stusb160x *chip;
+ const struct of_device_id *match;
+ struct regmap_config *regmap_config;
+ struct fwnode_handle *fwnode;
+ int ret;
+
+ chip = devm_kzalloc(&client->dev, sizeof(struct stusb160x), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, chip);
+
+ match = i2c_of_match_device(stusb160x_of_match, client);
+ regmap_config = (struct regmap_config *)match->data;
+ chip->regmap = devm_regmap_init_i2c(client, regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(&client->dev,
+ "Failed to allocate register map:%d\n", ret);
+ return ret;
+ }
+
+ chip->dev = &client->dev;
+
+ chip->vsys_supply = devm_regulator_get_optional(chip->dev, "vsys");
+ if (IS_ERR(chip->vsys_supply)) {
+ ret = PTR_ERR(chip->vsys_supply);
+ if (ret != -ENODEV)
+ return ret;
+ chip->vsys_supply = NULL;
+ }
+
+ chip->vdd_supply = devm_regulator_get_optional(chip->dev, "vdd");
+ if (IS_ERR(chip->vdd_supply)) {
+ ret = PTR_ERR(chip->vdd_supply);
+ if (ret != -ENODEV)
+ return ret;
+ chip->vdd_supply = NULL;
+ }
+
+ chip->vconn_supply = devm_regulator_get_optional(chip->dev, "vconn");
+ if (IS_ERR(chip->vconn_supply)) {
+ ret = PTR_ERR(chip->vconn_supply);
+ if (ret != -ENODEV)
+ return ret;
+ chip->vconn_supply = NULL;
+ }
+
+ fwnode = device_get_named_child_node(chip->dev, "connector");
+ if (IS_ERR(fwnode))
+ return PTR_ERR(fwnode);
+
+ /*
+ * When both VDD and VSYS power supplies are present, the low power
+ * supply VSYS is selected when VSYS voltage is above 3.1 V.
+ * Otherwise VDD is selected.
+ */
+ if (chip->vdd_supply &&
+ (!chip->vsys_supply ||
+ (regulator_get_voltage(chip->vsys_supply) <= 3100000)))
+ chip->main_supply = chip->vdd_supply;
+ else
+ chip->main_supply = chip->vsys_supply;
+
+ if (chip->main_supply) {
+ ret = regulator_enable(chip->main_supply);
+ if (ret) {
+ dev_err(chip->dev,
+ "Failed to enable main supply: %d\n", ret);
+ goto fwnode_put;
+ }
+ }
+
+ /* Get configuration from chip */
+ ret = stusb160x_get_caps(chip);
+ if (ret) {
+ dev_err(chip->dev, "Failed to get port caps: %d\n", ret);
+ goto main_reg_disable;
+ }
+
+ /* Get optional re-configuration from device tree */
+ ret = stusb160x_get_fw_caps(chip, fwnode);
+ if (ret) {
+ dev_err(chip->dev, "Failed to get connector caps: %d\n", ret);
+ goto main_reg_disable;
+ }
+
+ ret = stusb160x_chip_init(chip);
+ if (ret) {
+ dev_err(chip->dev, "Failed to init port: %d\n", ret);
+ goto main_reg_disable;
+ }
+
+ chip->port = typec_register_port(chip->dev, &chip->capability);
+ if (!chip->port) {
+ ret = -ENODEV;
+ goto all_reg_disable;
+ }
+
+ /*
+ * Default power operation mode initialization: will be updated upon
+ * attach/detach interrupt
+ */
+ typec_set_pwr_opmode(chip->port, chip->pwr_opmode);
+
+ if (client->irq) {
+ ret = stusb160x_irq_init(chip, client->irq);
+ if (ret)
+ goto port_unregister;
+
+ chip->role_sw = fwnode_usb_role_switch_get(fwnode);
+ if (IS_ERR(chip->role_sw)) {
+ ret = PTR_ERR(chip->role_sw);
+ if (ret != -EPROBE_DEFER)
+ dev_err(chip->dev,
+ "Failed to get usb role switch: %d\n",
+ ret);
+ goto port_unregister;
+ }
+ } else {
+ /*
+ * If Source or Dual power role, need to enable VDD supply
+ * providing Vbus if present. In case of interrupt support,
+ * VDD supply will be dynamically managed upon attach/detach
+ * interrupt.
+ */
+ if (chip->port_type != TYPEC_PORT_SNK && chip->vdd_supply) {
+ ret = regulator_enable(chip->vdd_supply);
+ if (ret) {
+ dev_err(chip->dev,
+ "Failed to enable VDD supply: %d\n",
+ ret);
+ goto port_unregister;
+ }
+ chip->vbus_on = true;
+ }
+ }
+
+ fwnode_handle_put(fwnode);
+
+ return 0;
+
+port_unregister:
+ typec_unregister_port(chip->port);
+all_reg_disable:
+ if (stusb160x_get_vconn(chip))
+ stusb160x_set_vconn(chip, false);
+main_reg_disable:
+ if (chip->main_supply)
+ regulator_disable(chip->main_supply);
+fwnode_put:
+ fwnode_handle_put(fwnode);
+
+ return ret;
+}
+
+static int stusb160x_remove(struct i2c_client *client)
+{
+ struct stusb160x *chip = i2c_get_clientdata(client);
+
+ if (chip->partner) {
+ typec_unregister_partner(chip->partner);
+ chip->partner = NULL;
+ }
+
+ if (chip->vbus_on)
+ regulator_disable(chip->vdd_supply);
+
+ if (chip->role_sw)
+ usb_role_switch_put(chip->role_sw);
+
+ typec_unregister_port(chip->port);
+
+ if (stusb160x_get_vconn(chip))
+ stusb160x_set_vconn(chip, false);
+
+ if (chip->main_supply)
+ regulator_disable(chip->main_supply);
+
+ return 0;
+}
+
+static int __maybe_unused stusb160x_suspend(struct device *dev)
+{
+ struct stusb160x *chip = dev_get_drvdata(dev);
+
+ /* Mask interrupts */
+ return regmap_update_bits(chip->regmap,
+ STUSB160X_ALERT_STATUS_MASK_CTRL,
+ STUSB160X_ALL_ALERTS, STUSB160X_ALL_ALERTS);
+}
+
+static int __maybe_unused stusb160x_resume(struct device *dev)
+{
+ struct stusb160x *chip = dev_get_drvdata(dev);
+ u32 status;
+ int ret;
+
+ ret = regcache_sync(chip->regmap);
+ if (ret)
+ return ret;
+
+ /* Check if attach/detach occurred during low power */
+ ret = regmap_read(chip->regmap,
+ STUSB160X_CC_CONNECTION_STATUS, &status);
+ if (ret)
+ return ret;
+
+ if (chip->partner && !(status & STUSB160X_CC_ATTACH))
+ stusb160x_detach(chip, status);
+
+ if (!chip->partner && (status & STUSB160X_CC_ATTACH)) {
+ ret = stusb160x_attach(chip, status);
+ if (ret)
+ dev_err(chip->dev, "attach failed: %d\n", ret);
+ }
+
+ /* Unmask interrupts */
+ return regmap_write_bits(chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL,
+ STUSB160X_CC_CONNECTION, 0);
+}
+
+static SIMPLE_DEV_PM_OPS(stusb160x_pm_ops, stusb160x_suspend, stusb160x_resume);
+
+static struct i2c_driver stusb160x_driver = {
+ .driver = {
+ .name = "stusb160x",
+ .pm = &stusb160x_pm_ops,
+ .of_match_table = stusb160x_of_match,
+ },
+ .probe_new = stusb160x_probe,
+ .remove = stusb160x_remove,
+};
+module_i2c_driver(stusb160x_driver);
+
+MODULE_AUTHOR("Amelie Delaunay <amelie.delaunay@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics STUSB160x Type-C controller driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff