// SPDX-License-Identifier: GPL-2.0
#include <linux/bitfield.h>
#include <linux/completion.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/usb/pd.h>
#include <linux/usb/role.h>
#include <linux/usb/typec.h>
#define RT1719_REG_TXCTRL1 0x03
#define RT1719_REG_TXCTRL2 0x04
#define RT1719_REG_POLICYINFO 0x0E
#define RT1719_REG_SRCPDO1 0x11
#define RT1719_REG_MASKS 0x2D
#define RT1719_REG_EVENTS 0x33
#define RT1719_REG_STATS 0x37
#define RT1719_REG_PSELINFO 0x3C
#define RT1719_REG_USBSETINFO 0x3E
#define RT1719_REG_VENID 0x82
#define RT1719_UNIQUE_PID 0x1719
#define RT1719_REQDRSWAP_MASK BIT(7)
#define RT1719_EVALMODE_MASK BIT(4)
#define RT1719_REQSRCPDO_MASK GENMASK(2, 0)
#define RT1719_TXSPDOREQ_MASK BIT(7)
#define RT1719_INT_DRSW_ACCEPT BIT(23)
#define RT1719_INT_RX_SRCCAP BIT(21)
#define RT1719_INT_VBUS_DCT BIT(6)
#define RT1719_INT_VBUS_PRESENT BIT(5)
#define RT1719_INT_PE_SNK_RDY BIT(2)
#define RT1719_CC1_STAT GENMASK(9, 8)
#define RT1719_CC2_STAT GENMASK(11, 10)
#define RT1719_POLARITY_MASK BIT(23)
#define RT1719_DATAROLE_MASK BIT(22)
#define RT1719_PDSPECREV_MASK GENMASK(21, 20)
#define RT1719_SPDOSEL_MASK GENMASK(18, 16)
#define RT1719_SPDONUM_MASK GENMASK(15, 13)
#define RT1719_ATTACH_VBUS BIT(12)
#define RT1719_ATTACH_DBG BIT(10)
#define RT1719_ATTACH_SNK BIT(9)
#define RT1719_ATTACHDEV_MASK (RT1719_ATTACH_VBUS | RT1719_ATTACH_DBG | \
RT1719_ATTACH_SNK)
#define RT1719_PE_EXP_CONTRACT BIT(2)
#define RT1719_PSEL_SUPPORT BIT(15)
#define RT1719_TBLSEL_MASK BIT(6)
#define RT1719_LATPSEL_MASK GENMASK(5, 0)
#define RT1719_USBINFO_MASK GENMASK(1, 0)
#define RT1719_USB_DFPUFP 3
#define RT1719_MAX_SRCPDO 7
enum {
SNK_PWR_OPEN = 0,
SNK_PWR_DEF,
SNK_PWR_1P5A,
SNK_PWR_3A
};
enum {
USBPD_SPECREV_1_0 = 0,
USBPD_SPECREV_2_0,
USBPD_SPECREV_3_0
};
enum rt1719_snkcap {
RT1719_SNKCAP_5V = 0,
RT1719_SNKCAP_9V,
RT1719_SNKCAP_12V,
RT1719_SNKCAP_15V,
RT1719_SNKCAP_20V,
RT1719_MAX_SNKCAP
};
struct rt1719_psel_cap {
u8 lomask;
u8 himask;
u32 milliwatt;
u32 milliamp;
};
struct rt1719_data {
struct device *dev;
struct regmap *regmap;
struct typec_port *port;
struct usb_role_switch *role_sw;
struct power_supply *psy;
struct typec_partner *partner;
struct power_supply_desc psy_desc;
struct usb_pd_identity partner_ident;
struct typec_partner_desc partner_desc;
struct completion req_completion;
enum power_supply_usb_type usb_type;
bool attached;
bool pd_capable;
bool drswap_support;
u32 voltage;
u32 req_voltage;
u32 max_current;
u32 op_current;
u32 spdos[RT1719_MAX_SRCPDO];
u16 snkcaps[RT1719_MAX_SNKCAP];
int spdo_num;
int spdo_sel;
u32 conn_info;
u16 conn_stat;
};
static const enum power_supply_property rt1719_psy_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW
};
static int rt1719_read16(struct rt1719_data *data, unsigned int reg, u16 *val)
{
__le16 regval;
int ret;
ret = regmap_raw_read(data->regmap, reg, ®val, sizeof(regval));
if (ret)
return ret;
*val = le16_to_cpu(regval);
return 0;
}
static int rt1719_read32(struct rt1719_data *data, unsigned int reg, u32 *val)
{
__le32 regval;
int ret;
ret = regmap_raw_read(data->regmap, reg, ®val, sizeof(regval));
if (ret)
return ret;
*val = le32_to_cpu(regval);
return 0;
}
static int rt1719_write32(struct rt1719_data *data, unsigned int reg, u32 val)
{
__le32 regval = cpu_to_le32(val);
return regmap_raw_write(data->regmap, reg, ®val, sizeof(regval));
}
static enum typec_pwr_opmode rt1719_get_pwr_opmode(u32 conn, u16 stat)
{
u16 cc1, cc2, cc_stat;
cc1 = FIELD_GET(RT1719_CC1_STAT, stat);
cc2 = FIELD_GET(RT1719_CC2_STAT, stat);
if (conn & RT1719_ATTACH_SNK) {
if (conn & RT1719_POLARITY_MASK)
cc_stat = cc2;
else
cc_stat = cc1;
switch (cc_stat) {
case SNK_PWR_3A:
return TYPEC_PWR_MODE_3_0A;
case SNK_PWR_1P5A:
return TYPEC_PWR_MODE_1_5A;
}
} else if (conn & RT1719_ATTACH_DBG) {
if ((cc1 == SNK_PWR_1P5A && cc2 == SNK_PWR_DEF) ||
(cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_1P5A))
return TYPEC_PWR_MODE_1_5A;
else if ((cc1 == SNK_PWR_3A && cc2 == SNK_PWR_DEF) ||
(cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_3A))
return TYPEC_PWR_MODE_3_0A;
}
return TYPEC_PWR_MODE_USB;
}
static enum typec_data_role rt1719_get_data_role(u32 conn)
{
if (conn & RT1719_DATAROLE_MASK)
return TYPEC_HOST;
return TYPEC_DEVICE;
}
static void rt1719_set_data_role(struct rt1719_data *data,
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(data->role_sw, usb_role);
typec_set_data_role(data->port, data_role);
}
static void rt1719_update_data_role(struct rt1719_data *data)
{
if (!data->attached)
return;
rt1719_set_data_role(data, rt1719_get_data_role(data->conn_info), true);
}
static void rt1719_register_partner(struct rt1719_data *data)
{
u16 spec_rev = 0;
if (data->pd_capable) {
u32 rev;
rev = FIELD_GET(RT1719_PDSPECREV_MASK, data->conn_info);
switch (rev) {
case USBPD_SPECREV_3_0:
spec_rev = 0x0300;
break;
case USBPD_SPECREV_2_0:
spec_rev = 0x0200;
break;
default:
spec_rev = 0x0100;
break;
}
}
/* Just to prevent multiple times attach */
if (data->partner)
typec_unregister_partner(data->partner);
memset(&data->partner_ident, 0, sizeof(data->partner_ident));
data->partner_desc.usb_pd = data->pd_capable;
data->partner_desc.pd_revision = spec_rev;
if (data->conn_info & RT1719_ATTACH_DBG)
data->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
else
data->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
data->partner = typec_register_partner(data->port, &data->partner_desc);
}
static void rt1719_attach(struct rt1719_data *data)
{
enum typec_pwr_opmode pwr_opmode;
enum typec_data_role data_role;
u32 volt = 5000, curr = 500;
if (!(data->conn_info & RT1719_ATTACHDEV_MASK))
return;
pwr_opmode = rt1719_get_pwr_opmode(data->conn_info, data->conn_stat);
data_role = rt1719_get_data_role(data->conn_info);
typec_set_pwr_opmode(data->port, pwr_opmode);
rt1719_set_data_role(data, data_role, true);
if (data->conn_info & RT1719_ATTACH_SNK)
rt1719_register_partner(data);
if (pwr_opmode == TYPEC_PWR_MODE_3_0A)
curr = 3000;
else if (pwr_opmode == TYPEC_PWR_MODE_1_5A)
curr = 1500;
data->voltage = volt * 1000;
data->max_current = data->op_current = curr * 1000;
data->attached = true;
power_supply_changed(data->psy);
}
static void rt1719_detach(struct rt1719_data *data)
{
if (!data->attached || (data->conn_info & RT1719_ATTACHDEV_MASK))
return;
typec_unregister_partner(data->partner);
data->partner = NULL;
typec_set_pwr_opmode(data->port, TYPEC_PWR_MODE_USB);
rt1719_set_data_role(data, TYPEC_DEVICE, false);
memset32(data->spdos, 0, RT1719_MAX_SRCPDO);
data->spdo_num = 0;
data->voltage = data->max_current = data->op_current = 0;
data->attached = data->pd_capable = false;
data->usb_type = POWER_SUPPLY_USB_TYPE_C;
power_supply_changed(data->psy);
}
static void rt1719_update_operating_status(struct rt1719_data *data)
{
enum power_supply_usb_type usb_type = POWER_SUPPLY_USB_TYPE_PD;
u32 voltage, max_current, op_current;
int i, snk_sel;
for (i = 0; i < data->spdo_num; i++) {
u32 pdo = data->spdos[i];
enum pd_pdo_type type = pdo_type(pdo);
if (type == PDO_TYPE_APDO) {
usb_type = POWER_SUPPLY_USB_TYPE_PD_PPS;
break;
}
}
data->spdo_sel = FIELD_GET(RT1719_SPDOSEL_MASK, data->conn_info);
if (data->spdo_sel <= 0)
return;
data->usb_type = usb_type;
voltage = pdo_fixed_voltage(data->spdos[data->spdo_sel - 1]);
max_current = pdo_max_current(data->spdos[data->spdo_sel - 1]);
switch (voltage) {
case 5000:
snk_sel = RT1719_SNKCAP_5V;
break;
case 9000:
snk_sel = RT1719_SNKCAP_9V;
break;
case 12000:
snk_sel = RT1719_SNKCAP_12V;
break;
case 15000:
snk_sel = RT1719_SNKCAP_15V;
break;
case 20000:
snk_sel = RT1719_SNKCAP_20V;
break;
default:
return;
}
op_current = min(max_current, pdo_max_current(data->snkcaps[snk_sel]));
/* covert mV/mA to uV/uA */
data->voltage = voltage * 1000;
data->max_current = max_current * 1000;
data->op_current = op_current * 1000;
power_supply_changed(data->psy);
}
static void rt1719_update_pwr_opmode(struct rt1719_data *data)
{
if (!data->attached)
return;
if (!data->pd_capable) {
data->pd_capable = true;
typec_set_pwr_opmode(data->port, TYPEC_PWR_MODE_PD);
rt1719_register_partner(data);
}
rt1719_update_operating_status(data);
}
static void rt1719_update_source_pdos(struct rt1719_data *data)
{
int spdo_num = FIELD_GET(RT1719_SPDONUM_MASK, data->conn_info);
__le32 src_pdos[RT1719_MAX_SRCPDO] = { };
int i, ret;
if (!data->attached)
return;
ret = regmap_raw_read(data->regmap, RT1719_REG_SRCPDO1, src_pdos,
sizeof(__le32) * spdo_num);
if (ret)
return;
data->spdo_num = spdo_num;
for (i = 0; i < spdo_num; i++)
data->spdos[i] = le32_to_cpu(src_pdos[i]);
}
static int rt1719_dr_set(struct typec_port *port, enum typec_data_role role)
{
struct rt1719_data *data = typec_get_drvdata(port);
enum typec_data_role cur_role;
int ret;
if (!data->attached || !data->pd_capable || !data->drswap_support)
return -EOPNOTSUPP;
if (data->spdo_num > 0 && !(data->spdos[0] & PDO_FIXED_DATA_SWAP))
return -EINVAL;
cur_role = rt1719_get_data_role(data->conn_info);
if (cur_role == role)
return 0;
ret = regmap_update_bits(data->regmap, RT1719_REG_TXCTRL1,
RT1719_REQDRSWAP_MASK, RT1719_REQDRSWAP_MASK);
if (ret)
return ret;
reinit_completion(&data->req_completion);
ret = wait_for_completion_timeout(&data->req_completion,
msecs_to_jiffies(400));
if (ret == 0)
return -ETIMEDOUT;
cur_role = rt1719_get_data_role(data->conn_info);
if (cur_role != role)
return -EAGAIN;
rt1719_set_data_role(data, role, true);
return 0;
}
static const struct typec_operations rt1719_port_ops = {
.dr_set = rt1719_dr_set,
};
static int rt1719_usbpd_request_voltage(struct rt1719_data *data)
{
u32 src_voltage;
int snk_sel, src_sel = -1;
int i, ret;
if (!data->attached || !data->pd_capable || data->spdo_sel <= 0)
return -EINVAL;
src_voltage = pdo_fixed_voltage(data->spdos[data->spdo_sel - 1]);
if (src_voltage == data->req_voltage)
return 0;
switch (data->req_voltage) {
case 5000:
snk_sel = RT1719_SNKCAP_5V;
break;
case 9000:
snk_sel = RT1719_SNKCAP_9V;
break;
case 12000:
snk_sel = RT1719_SNKCAP_12V;
break;
case 15000:
snk_sel = RT1719_SNKCAP_15V;
break;
case 20000:
snk_sel = RT1719_SNKCAP_20V;
break;
default:
return -EINVAL;
}
if (!(data->snkcaps[snk_sel] & RT1719_PSEL_SUPPORT))
return -EINVAL;
for (i = 0; i < data->spdo_num; i++) {
enum pd_pdo_type type = pdo_type(data->spdos[i]);
if (type != PDO_TYPE_FIXED)
continue;
src_voltage = pdo_fixed_voltage(data->spdos[i]);
if (src_voltage == data->req_voltage) {
src_sel = i;
break;
}
}
if (src_sel == -1)
return -EOPNOTSUPP;
ret = regmap_update_bits(data->regmap, RT1719_REG_TXCTRL1,
RT1719_EVALMODE_MASK | RT1719_REQSRCPDO_MASK,
RT1719_EVALMODE_MASK | (src_sel + 1));
ret |= regmap_update_bits(data->regmap, RT1719_REG_TXCTRL2,
RT1719_TXSPDOREQ_MASK, RT1719_TXSPDOREQ_MASK);
if (ret)
return ret;
reinit_completion(&data->req_completion);
ret = wait_for_completion_timeout(&data->req_completion,
msecs_to_jiffies(400));
if (!ret)
return -ETIMEDOUT;
return 0;
}
static int rt1719_psy_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct rt1719_data *data = power_supply_get_drvdata(psy);
if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW) {
data->req_voltage = val->intval / 1000;
return rt1719_usbpd_request_voltage(data);
}
return -EINVAL;
}
static int rt1719_psy_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt1719_data *data = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = data->attached ? 1 : 0;
break;
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = data->usb_type;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = data->voltage;
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = data->max_current;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = data->op_current;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int rt1719_psy_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW)
return 1;
return 0;
}
static int devm_rt1719_psy_register(struct rt1719_data *data)
{
struct power_supply_config psy_cfg = { };
char *psy_name;
psy_cfg.fwnode = dev_fwnode(data->dev);
psy_cfg.drv_data = data;
psy_name = devm_kasprintf(data->dev, GFP_KERNEL, "rt1719-source-psy-%s",
dev_name(data->dev));
if (!psy_name)
return -ENOMEM;
data->psy_desc.name = psy_name;
data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
data->psy_desc.usb_types = BIT(POWER_SUPPLY_USB_TYPE_C) |
BIT(POWER_SUPPLY_USB_TYPE_PD) |
BIT(POWER_SUPPLY_USB_TYPE_PD_PPS);
data->psy_desc.properties = rt1719_psy_properties;
data->psy_desc.num_properties = ARRAY_SIZE(rt1719_psy_properties);
data->psy_desc.get_property = rt1719_psy_get_property;
data->psy_desc.set_property = rt1719_psy_set_property;
data->psy_desc.property_is_writeable = rt1719_psy_property_is_writeable;
data->usb_type = POWER_SUPPLY_USB_TYPE_C;
data->psy = devm_power_supply_register(data->dev, &data->psy_desc,
&psy_cfg);
return PTR_ERR_OR_ZERO(data->psy);
}
static irqreturn_t rt1719_irq_handler(int irq, void *priv)
{
struct rt1719_data *data = priv;
u32 events, conn_info;
u16 conn_stat;
int ret;
ret = rt1719_read32(data, RT1719_REG_EVENTS, &events);
ret |= rt1719_read32(data, RT1719_REG_POLICYINFO, &conn_info);
ret |= rt1719_read16(data, RT1719_REG_STATS, &conn_stat);
if (ret)
return IRQ_NONE;
data->conn_info = conn_info;
data->conn_stat = conn_stat;
events &= (RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
RT1719_INT_VBUS_PRESENT | RT1719_INT_VBUS_DCT |
RT1719_INT_PE_SNK_RDY);
if (events & RT1719_INT_DRSW_ACCEPT)
rt1719_update_data_role(data);
if (events & RT1719_INT_VBUS_PRESENT)
rt1719_attach(data);
if (events & RT1719_INT_VBUS_DCT)
rt1719_detach(data);
if (events & RT1719_INT_RX_SRCCAP)
rt1719_update_source_pdos(data);
if (events & RT1719_INT_PE_SNK_RDY) {
complete(&data->req_completion);
rt1719_update_pwr_opmode(data);
}
/* Write 1 to clear already handled events */
rt1719_write32(data, RT1719_REG_EVENTS, events);
return IRQ_HANDLED;
}
static int rt1719_irq_init(struct rt1719_data *data)
{
struct i2c_client *i2c = to_i2c_client(data->dev);
u32 irq_enable;
int ret;
irq_enable = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
RT1719_INT_PE_SNK_RDY;
ret = rt1719_write32(data, RT1719_REG_MASKS, irq_enable);
if (ret) {
dev_err(&i2c->dev, "Failed to config irq enable\n");
return ret;
}
return devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
rt1719_irq_handler, IRQF_ONESHOT,
dev_name(&i2c->dev), data);
}
static int rt1719_init_attach_state(struct rt1719_data *data)
{
u32 conn_info, irq_clear;
u16 conn_stat;
int ret;
irq_clear = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
RT1719_INT_PE_SNK_RDY;
ret = rt1719_read32(data, RT1719_REG_POLICYINFO, &conn_info);
ret |= rt1719_read16(data, RT1719_REG_STATS, &conn_stat);
ret |= rt1719_write32(data, RT1719_REG_EVENTS, irq_clear);
if (ret)
return ret;
data->conn_info = conn_info;
data->conn_stat = conn_stat;
if (conn_info & RT1719_ATTACHDEV_MASK)
rt1719_attach(data);
if (conn_info & RT1719_PE_EXP_CONTRACT) {
rt1719_update_source_pdos(data);
rt1719_update_pwr_opmode(data);
}
return 0;
}
#define RT1719_PSEL_CAPINFO(_lomask, _milliwatt, _himask, _milliamp) { \
.lomask = _lomask, \
.milliwatt = _milliwatt, \
.himask = _himask, \
.milliamp = _milliamp, \
}
static const struct rt1719_psel_cap rt1719_psel_caps[] = {
RT1719_PSEL_CAPINFO(0x18, 75000, 0x10, 5000),
RT1719_PSEL_CAPINFO(0x18, 60000, 0x10, 4500),
RT1719_PSEL_CAPINFO(0x18, 45000, 0x10, 4000),
RT1719_PSEL_CAPINFO(0x18, 30000, 0x10, 3500),
RT1719_PSEL_CAPINFO(0x18, 25000, 0x10, 3000),
RT1719_PSEL_CAPINFO(0x18, 20000, 0x10, 2500),
RT1719_PSEL_CAPINFO(0x18, 15000, 0x10, 2000),
RT1719_PSEL_CAPINFO(0x18, 10000, 0x10, 1000),
RT1719_PSEL_CAPINFO(0x1C, 60000, 0x1F, 5000),
RT1719_PSEL_CAPINFO(0x1C, 45000, 0x1F, 4500),
RT1719_PSEL_CAPINFO(0x1C, 30000, 0x1F, 4000),
RT1719_PSEL_CAPINFO(0x1C, 24000, 0x1F, 3500),
RT1719_PSEL_CAPINFO(0x1C, 15000, 0x1F, 3000),
RT1719_PSEL_CAPINFO(0x1C, 10000, 0x1F, 2500),
RT1719_PSEL_CAPINFO(0x0C, 60000, 0x1F, 2000),
RT1719_PSEL_CAPINFO(0x0C, 45000, 0x1F, 1000),
RT1719_PSEL_CAPINFO(0x0C, 36000, 0x08, 5000),
RT1719_PSEL_CAPINFO(0x0C, 30000, 0x08, 4500),
RT1719_PSEL_CAPINFO(0x0C, 24000, 0x08, 4000),
RT1719_PSEL_CAPINFO(0x0C, 15000, 0x08, 3500),
RT1719_PSEL_CAPINFO(0x0C, 10000, 0x08, 3000),
RT1719_PSEL_CAPINFO(0x1E, 45000, 0x08, 2500),
RT1719_PSEL_CAPINFO(0x1E, 36000, 0x08, 2000),
RT1719_PSEL_CAPINFO(0x1E, 27000, 0x08, 1500),
RT1719_PSEL_CAPINFO(0x1E, 20000, 0x08, 1000),
RT1719_PSEL_CAPINFO(0x1E, 15000, 0x0F, 5000),
RT1719_PSEL_CAPINFO(0x1E, 9000, 0x0F, 4500),
RT1719_PSEL_CAPINFO(0x0E, 45000, 0x0F, 4000),
RT1719_PSEL_CAPINFO(0x0E, 36000, 0x0F, 3500),
RT1719_PSEL_CAPINFO(0x0E, 27000, 0x0F, 3000),
RT1719_PSEL_CAPINFO(0x0E, 20000, 0x0F, 2500),
RT1719_PSEL_CAPINFO(0x0E, 15000, 0x0F, 2000),
RT1719_PSEL_CAPINFO(0x0E, 9000, 0x0F, 1500),
RT1719_PSEL_CAPINFO(0x06, 45000, 0x0F, 1000),
RT1719_PSEL_CAPINFO(0x06, 36000, 0x0F, 500),
RT1719_PSEL_CAPINFO(0x06, 27000, 0x04, 5000),
RT1719_PSEL_CAPINFO(0x06, 24000, 0x04, 4500),
RT1719_PSEL_CAPINFO(0x06, 18000, 0x04, 4000),
RT1719_PSEL_CAPINFO(0x06, 12000, 0x04, 3500),
RT1719_PSEL_CAPINFO(0x06, 9000, 0x04, 3000),
RT1719_PSEL_CAPINFO(0x1F, 25000, 0x04, 2500),
RT1719_PSEL_CAPINFO(0x1F, 20000, 0x04, 2000),
RT1719_PSEL_CAPINFO(0x1F, 15000, 0x04, 1500),
RT1719_PSEL_CAPINFO(0x1F, 10000, 0x04, 1000),
RT1719_PSEL_CAPINFO(0x1F, 7500, 0x07, 5000),
RT1719_PSEL_CAPINFO(0x0F, 25000, 0x07, 4500),
RT1719_PSEL_CAPINFO(0x0F, 20000, 0x07, 4000),
RT1719_PSEL_CAPINFO(0x0F, 15000, 0x07, 3500),
RT1719_PSEL_CAPINFO(0x0F, 10000, 0x07, 3000),
RT1719_PSEL_CAPINFO(0x0F, 7500, 0x07, 2500),
RT1719_PSEL_CAPINFO(0x07, 25000, 0x07, 2000),
RT1719_PSEL_CAPINFO(0x07, 20000, 0x07, 1500),
RT1719_PSEL_CAPINFO(0x07, 15000, 0x07, 1000),
RT1719_PSEL_CAPINFO(0x07, 10000, 0x07, 500),
RT1719_PSEL_CAPINFO(0x07, 7500, 0x03, 5000),
RT1719_PSEL_CAPINFO(0x03, 25000, 0x03, 4500),
RT1719_PSEL_CAPINFO(0x03, 20000, 0x03, 4000),
RT1719_PSEL_CAPINFO(0x03, 15000, 0x03, 3500),
RT1719_PSEL_CAPINFO(0x03, 10000, 0x03, 3000),
RT1719_PSEL_CAPINFO(0x03, 7500, 0x03, 2500),
RT1719_PSEL_CAPINFO(0x01, 15000, 0x03, 2000),
RT1719_PSEL_CAPINFO(0x01, 10000, 0x03, 1500),
RT1719_PSEL_CAPINFO(0x01, 7500, 0x03, 1000),
RT1719_PSEL_CAPINFO(0x01, 2500, 0x03, 500)
};
static u16 rt1719_gen_snkcap_by_current(const struct rt1719_psel_cap *psel_cap,
enum rt1719_snkcap capsel)
{
u16 cap = RT1719_PSEL_SUPPORT;
if (!(psel_cap->himask & BIT(capsel)))
return 0;
cap |= psel_cap->milliamp / 10;
return cap;
}
static u16 rt1719_gen_snkcap_by_watt(const struct rt1719_psel_cap *psel_cap,
enum rt1719_snkcap capsel)
{
u32 volt_div[RT1719_MAX_SNKCAP] = { 5, 9, 12, 15, 20 };
u16 cap = RT1719_PSEL_SUPPORT;
if (!(psel_cap->lomask & BIT(capsel)))
return 0;
cap |= min(psel_cap->milliwatt / volt_div[capsel], (u32)5000) / 10;
return cap;
}
static u16 rt1719_gen_snkcap(unsigned int pselinfo, enum rt1719_snkcap capsel)
{
int psel = FIELD_GET(RT1719_LATPSEL_MASK, pselinfo);
const struct rt1719_psel_cap *psel_cap;
bool by_current = false;
if (pselinfo & RT1719_TBLSEL_MASK)
by_current = true;
psel_cap = rt1719_psel_caps + psel;
if (by_current)
return rt1719_gen_snkcap_by_current(psel_cap, capsel);
return rt1719_gen_snkcap_by_watt(psel_cap, capsel);
}
static int rt1719_get_caps(struct rt1719_data *data)
{
unsigned int pselinfo, usbinfo;
int i, ret;
ret = regmap_read(data->regmap, RT1719_REG_PSELINFO, &pselinfo);
ret |= regmap_read(data->regmap, RT1719_REG_USBSETINFO, &usbinfo);
if (ret)
return ret;
for (i = 0; i < RT1719_MAX_SNKCAP; i++)
data->snkcaps[i] = rt1719_gen_snkcap(pselinfo, i);
usbinfo = FIELD_GET(RT1719_USBINFO_MASK, usbinfo);
if (usbinfo == RT1719_USB_DFPUFP)
data->drswap_support = true;
return 0;
}
static int rt1719_check_exist(struct rt1719_data *data)
{
u16 pid;
int ret;
ret = rt1719_read16(data, RT1719_REG_VENID, &pid);
if (ret)
return ret;
if (pid != RT1719_UNIQUE_PID) {
dev_err(data->dev, "Incorrect PID 0x%04x\n", pid);
return -ENODEV;
}
return 0;
}
static const struct regmap_config rt1719_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
};
static int rt1719_probe(struct i2c_client *i2c)
{
struct rt1719_data *data;
struct fwnode_handle *fwnode;
struct typec_capability typec_cap = { };
int ret;
data = devm_kzalloc(&i2c->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = &i2c->dev;
init_completion(&data->req_completion);
data->regmap = devm_regmap_init_i2c(i2c, &rt1719_regmap_config);
if (IS_ERR(data->regmap)) {
ret = PTR_ERR(data->regmap);
dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
return ret;
}
ret = rt1719_check_exist(data);
if (ret)
return ret;
ret = rt1719_get_caps(data);
if (ret)
return ret;
fwnode = device_get_named_child_node(&i2c->dev, "connector");
if (!fwnode)
return -ENODEV;
data->role_sw = fwnode_usb_role_switch_get(fwnode);
if (IS_ERR(data->role_sw)) {
ret = PTR_ERR(data->role_sw);
dev_err(&i2c->dev, "Failed to get usb role switch (%d)\n", ret);
goto err_fwnode_put;
}
ret = devm_rt1719_psy_register(data);
if (ret) {
dev_err(&i2c->dev, "Failed to register psy (%d)\n", ret);
goto err_role_put;
}
typec_cap.revision = USB_TYPEC_REV_1_2;
typec_cap.pd_revision = 0x300; /* USB-PD spec release 3.0 */
typec_cap.type = TYPEC_PORT_SNK;
typec_cap.data = TYPEC_PORT_DRD;
typec_cap.ops = &rt1719_port_ops;
typec_cap.fwnode = fwnode;
typec_cap.driver_data = data;
typec_cap.accessory[0] = TYPEC_ACCESSORY_DEBUG;
data->partner_desc.identity = &data->partner_ident;
data->port = typec_register_port(&i2c->dev, &typec_cap);
if (IS_ERR(data->port)) {
ret = PTR_ERR(data->port);
dev_err(&i2c->dev, "Failed to register typec port (%d)\n", ret);
goto err_role_put;
}
ret = rt1719_init_attach_state(data);
if (ret) {
dev_err(&i2c->dev, "Failed to init attach state (%d)\n", ret);
goto err_role_put;
}
ret = rt1719_irq_init(data);
if (ret) {
dev_err(&i2c->dev, "Failed to init irq\n");
goto err_role_put;
}
fwnode_handle_put(fwnode);
i2c_set_clientdata(i2c, data);
return 0;
err_role_put:
usb_role_switch_put(data->role_sw);
err_fwnode_put:
fwnode_handle_put(fwnode);
return ret;
}
static void rt1719_remove(struct i2c_client *i2c)
{
struct rt1719_data *data = i2c_get_clientdata(i2c);
typec_unregister_port(data->port);
usb_role_switch_put(data->role_sw);
}
static const struct of_device_id __maybe_unused rt1719_device_table[] = {
{ .compatible = "richtek,rt1719", },
{ }
};
MODULE_DEVICE_TABLE(of, rt1719_device_table);
static struct i2c_driver rt1719_driver = {
.driver = {
.name = "rt1719",
.of_match_table = rt1719_device_table,
},
.probe = rt1719_probe,
.remove = rt1719_remove,
};
module_i2c_driver(rt1719_driver);
MODULE_AUTHOR("ChiYuan Huang <[email protected]>");
MODULE_DESCRIPTION("Richtek RT1719 Sink Only USBPD Controller Driver");
MODULE_LICENSE("GPL v2");
Codebase Browser
linux