// 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) {
ret = typec_find_port_power_role(cap_str);
if (ret < 0)
return ret;
chip->port_type = 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, "typec-power-opmode", &cap_str);
if (!ret) {
ret = typec_find_pwr_opmode(cap_str);
/* Power delivery not yet supported */
if (ret < 0 || ret == TYPEC_PWR_MODE_PD) {
dev_err(chip->dev, "bad power operation mode: %d\n", ret);
return -EINVAL;
}
chip->pwr_opmode = 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},
{},
};
MODULE_DEVICE_TABLE(of, stusb160x_of_match);
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 (!fwnode)
return -ENODEV;
/*
* This fwnode has a "compatible" property, but is never populated as a
* struct device. Instead we simply parse it to read the properties.
* This it breaks fw_devlink=on. To maintain backward compatibility
* with existing DT files, we work around this by deleting any
* fwnode_links to/from this fwnode.
*/
fw_devlink_purge_absent_suppliers(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 (IS_ERR(chip->port)) {
ret = PTR_ERR(chip->port);
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) {
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;
}
ret = stusb160x_irq_init(chip, client->irq);
if (ret)
goto role_sw_put;
} 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;
role_sw_put:
if (chip->role_sw)
usb_role_switch_put(chip->role_sw);
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");