[PATCH 2/2] usb: typec: rt1719: Add support for Richtek RT1719
From: cy_huang
Date: Fri Jan 14 2022 - 10:59:14 EST
From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
Richtek RT1719 is a sink-only Type-C PD controller it complies with
latest USB Type-C and PD standards. It integrates the physical layer of
USB power delivery protocol to allow up to 100W of power.
Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
---
drivers/usb/typec/Kconfig | 12 +
drivers/usb/typec/Makefile | 1 +
drivers/usb/typec/rt1719.c | 976 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 989 insertions(+)
create mode 100644 drivers/usb/typec/rt1719.c
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
index ab480f3..bc918ca 100644
--- a/drivers/usb/typec/Kconfig
+++ b/drivers/usb/typec/Kconfig
@@ -52,6 +52,18 @@ source "drivers/usb/typec/ucsi/Kconfig"
source "drivers/usb/typec/tipd/Kconfig"
+config TYPEC_RT1719
+ tristate "Richtek RT1719 Sink Only Type-C controller driver"
+ depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y or M here if your system has Richtek RT1719 sink only
+ Type-C port controller driver.
+
+ If you choose to build this driver as a dynamically linked module, the
+ module will be called rt1719.ko
+
config TYPEC_HD3SS3220
tristate "TI HD3SS3220 Type-C DRP Port controller driver"
depends on I2C
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index 57870a2..441dd6c 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -9,4 +9,5 @@ obj-$(CONFIG_TYPEC_TPS6598X) += tipd/
obj-$(CONFIG_TYPEC_HD3SS3220) += hd3ss3220.o
obj-$(CONFIG_TYPEC_QCOM_PMIC) += qcom-pmic-typec.o
obj-$(CONFIG_TYPEC_STUSB160X) += stusb160x.o
+obj-$(CONFIG_TYPEC_RT1719) += rt1719.o
obj-$(CONFIG_TYPEC) += mux/
diff --git a/drivers/usb/typec/rt1719.c b/drivers/usb/typec/rt1719.c
new file mode 100644
index 00000000..d31dce9
--- /dev/null
+++ b/drivers/usb/typec/rt1719.c
@@ -0,0 +1,976 @@
+// 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_usb_type rt1719_psy_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_C,
+ POWER_SUPPLY_USB_TYPE_PD,
+ POWER_SUPPLY_USB_TYPE_PD_PPS
+};
+
+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 -EINVAL;
+
+ 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 -ENOTSUPP;
+
+ 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 -ENOTSUPP;
+
+ 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);
+ int ret = -ENOTSUPP;
+
+ if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW) {
+ data->req_voltage = val->intval / 1000;
+ ret = rt1719_usbpd_request_voltage(data);
+ }
+
+ return ret;
+}
+
+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)
+{
+ static const char *rt1719_psy_name_prefix = "rt1719-source-psy-";
+ const char *port_dev_name = dev_name(data->dev);
+ struct power_supply_config psy_cfg = { };
+ size_t psy_name_len = strlen(rt1719_psy_name_prefix) +
+ strlen(port_dev_name) + 1;
+ char *psy_name;
+
+ psy_cfg.fwnode = dev_fwnode(data->dev);
+ psy_cfg.drv_data = data;
+
+ psy_name = devm_kzalloc(data->dev, psy_name_len, GFP_KERNEL);
+ if (!psy_name)
+ return -ENOMEM;
+
+ snprintf(psy_name, psy_name_len, "%s%s", rt1719_psy_name_prefix,
+ port_dev_name);
+ data->psy_desc.name = psy_name;
+ data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
+ data->psy_desc.usb_types = rt1719_psy_usb_types;
+ data->psy_desc.num_usb_types = ARRAY_SIZE(rt1719_psy_usb_types);
+ 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;
+
+ /*
+ * 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.
+ */
+ fwnode = device_get_named_child_node(&i2c->dev, "connector");
+ if (!fwnode)
+ return -ENODEV;
+
+ fw_devlink_purge_absent_suppliers(fwnode);
+
+ 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 int 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);
+
+ return 0;
+}
+
+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_new = rt1719_probe,
+ .remove = rt1719_remove,
+};
+module_i2c_driver(rt1719_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Richtek RT1719 Sink Only USBPD Controller Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4