usb: typec: driver for TI HD3SS3220 USB Type-C DRP port controller (1c48c759) · Commits · 戴 / test

drivers/usb/typec/Kconfig

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		@@ -50,6 +50,16 @@ source "drivers/usb/typec/tcpm/Kconfig"

		source "drivers/usb/typec/ucsi/Kconfig"

		config TYPEC_HD3SS3220
		tristate "TI HD3SS3220 Type-C DRP Port controller driver"
		depends on I2C
		help
		Say Y or M here if your system has TI HD3SS3220 Type-C DRP Port
		controller driver.

		If you choose to build this driver as a dynamically linked module, the
		module will be called hd3ss3220.ko.

		config TYPEC_TPS6598X
		tristate "TI TPS6598x USB Power Delivery controller driver"
		depends on I2C

drivers/usb/typec/Makefile

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		@@ -4,5 +4,6 @@ typec-y := class.o mux.o bus.o
		obj-$(CONFIG_TYPEC) += altmodes/
		obj-$(CONFIG_TYPEC_TCPM) += tcpm/
		obj-$(CONFIG_TYPEC_UCSI) += ucsi/
		obj-$(CONFIG_TYPEC_HD3SS3220) += hd3ss3220.o
		obj-$(CONFIG_TYPEC_TPS6598X) += tps6598x.o
		obj-$(CONFIG_TYPEC) += mux/

drivers/usb/typec/hd3ss3220.c

0 → 100644

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		// SPDX-License-Identifier: GPL-2.0+
		/*
		* TI HD3SS3220 Type-C DRP Port Controller Driver
		*
		* Copyright (C) 2019 Renesas Electronics Corp.
		*/

		#include <linux/module.h>
		#include <linux/i2c.h>
		#include <linux/usb/role.h>
		#include <linux/irqreturn.h>
		#include <linux/interrupt.h>
		#include <linux/module.h>
		#include <linux/regmap.h>
		#include <linux/slab.h>
		#include <linux/usb/typec.h>
		#include <linux/delay.h>

		#define HD3SS3220_REG_CN_STAT_CTRL 0x09
		#define HD3SS3220_REG_GEN_CTRL 0x0A
		#define HD3SS3220_REG_DEV_REV 0xA0

		/* Register HD3SS3220_REG_CN_STAT_CTRL*/
		#define HD3SS3220_REG_CN_STAT_CTRL_ATTACHED_STATE_MASK (BIT(7) \| BIT(6))
		#define HD3SS3220_REG_CN_STAT_CTRL_AS_DFP BIT(6)
		#define HD3SS3220_REG_CN_STAT_CTRL_AS_UFP BIT(7)
		#define HD3SS3220_REG_CN_STAT_CTRL_TO_ACCESSORY (BIT(7) \| BIT(6))
		#define HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS BIT(4)

		/* Register HD3SS3220_REG_GEN_CTRL*/
		#define HD3SS3220_REG_GEN_CTRL_SRC_PREF_MASK (BIT(2) \| BIT(1))
		#define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_DEFAULT 0x00
		#define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SNK BIT(1)
		#define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SRC (BIT(2) \| BIT(1))

		struct hd3ss3220 {
		struct device *dev;
		struct regmap *regmap;
		struct usb_role_switch *role_sw;
		struct typec_port *port;
		struct typec_capability typec_cap;
		};

		static int hd3ss3220_set_source_pref(struct hd3ss3220 *hd3ss3220, int src_pref)
		{
		return regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL,
		HD3SS3220_REG_GEN_CTRL_SRC_PREF_MASK,
		src_pref);
		}

		static enum usb_role hd3ss3220_get_attached_state(struct hd3ss3220 *hd3ss3220)
		{
		unsigned int reg_val;
		enum usb_role attached_state;
		int ret;

		ret = regmap_read(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT_CTRL,
		&reg_val);
		if (ret < 0)
		return ret;

		switch (reg_val & HD3SS3220_REG_CN_STAT_CTRL_ATTACHED_STATE_MASK) {
		case HD3SS3220_REG_CN_STAT_CTRL_AS_DFP:
		attached_state = USB_ROLE_HOST;
		break;
		case HD3SS3220_REG_CN_STAT_CTRL_AS_UFP:
		attached_state = USB_ROLE_DEVICE;
		break;
		default:
		attached_state = USB_ROLE_NONE;
		break;
		}

		return attached_state;
		}

		static int hd3ss3220_dr_set(const struct typec_capability *cap,
		enum typec_data_role role)
		{
		struct hd3ss3220 *hd3ss3220 = container_of(cap, struct hd3ss3220,
		typec_cap);
		enum usb_role role_val;
		int pref, ret = 0;

		if (role == TYPEC_HOST) {
		role_val = USB_ROLE_HOST;
		pref = HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SRC;
		} else {
		role_val = USB_ROLE_DEVICE;
		pref = HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SNK;
		}

		ret = hd3ss3220_set_source_pref(hd3ss3220, pref);
		usleep_range(10, 100);

		usb_role_switch_set_role(hd3ss3220->role_sw, role_val);
		typec_set_data_role(hd3ss3220->port, role);

		return ret;
		}

		static void hd3ss3220_set_role(struct hd3ss3220 *hd3ss3220)
		{
		enum usb_role role_state = hd3ss3220_get_attached_state(hd3ss3220);

		usb_role_switch_set_role(hd3ss3220->role_sw, role_state);
		if (role_state == USB_ROLE_NONE)
		hd3ss3220_set_source_pref(hd3ss3220,
		HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_DEFAULT);

		switch (role_state) {
		case USB_ROLE_HOST:
		typec_set_data_role(hd3ss3220->port, TYPEC_HOST);
		break;
		case USB_ROLE_DEVICE:
		typec_set_data_role(hd3ss3220->port, TYPEC_DEVICE);
		break;
		default:
		break;
		}
		}

		irqreturn_t hd3ss3220_irq(struct hd3ss3220 *hd3ss3220)
		{
		int err;

		hd3ss3220_set_role(hd3ss3220);
		err = regmap_update_bits_base(hd3ss3220->regmap,
		HD3SS3220_REG_CN_STAT_CTRL,
		HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS,
		HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS,
		NULL, false, true);
		if (err < 0)
		return IRQ_NONE;

		return IRQ_HANDLED;
		}

		static irqreturn_t hd3ss3220_irq_handler(int irq, void *data)
		{
		struct i2c_client *client = to_i2c_client(data);
		struct hd3ss3220 *hd3ss3220 = i2c_get_clientdata(client);

		return hd3ss3220_irq(hd3ss3220);
		}

		static const struct regmap_config config = {
		.reg_bits = 8,
		.val_bits = 8,
		.max_register = 0x0A,
		};

		static int hd3ss3220_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct hd3ss3220 *hd3ss3220;
		struct fwnode_handle *connector;
		int ret;
		unsigned int data;

		hd3ss3220 = devm_kzalloc(&client->dev, sizeof(struct hd3ss3220),
		GFP_KERNEL);
		if (!hd3ss3220)
		return -ENOMEM;

		i2c_set_clientdata(client, hd3ss3220);

		hd3ss3220->dev = &client->dev;
		hd3ss3220->regmap = devm_regmap_init_i2c(client, &config);
		if (IS_ERR(hd3ss3220->regmap))
		return PTR_ERR(hd3ss3220->regmap);

		hd3ss3220_set_source_pref(hd3ss3220,
		HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_DEFAULT);
		connector = device_get_named_child_node(hd3ss3220->dev, "connector");
		if (IS_ERR(connector))
		return PTR_ERR(connector);

		hd3ss3220->role_sw = fwnode_usb_role_switch_get(connector);
		fwnode_handle_put(connector);
		if (IS_ERR_OR_NULL(hd3ss3220->role_sw))
		return PTR_ERR(hd3ss3220->role_sw);

		hd3ss3220->typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
		hd3ss3220->typec_cap.dr_set = hd3ss3220_dr_set;
		hd3ss3220->typec_cap.type = TYPEC_PORT_DRP;
		hd3ss3220->typec_cap.data = TYPEC_PORT_DRD;

		hd3ss3220->port = typec_register_port(&client->dev,
		&hd3ss3220->typec_cap);
		if (IS_ERR(hd3ss3220->port))
		return PTR_ERR(hd3ss3220->port);

		hd3ss3220_set_role(hd3ss3220);
		ret = regmap_read(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT_CTRL, &data);
		if (ret < 0)
		goto error;

		if (data & HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS) {
		ret = regmap_write(hd3ss3220->regmap,
		HD3SS3220_REG_CN_STAT_CTRL,
		data \| HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS);
		if (ret < 0)
		goto error;
		}

		if (client->irq > 0) {
		ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
		hd3ss3220_irq_handler,
		IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
		"hd3ss3220", &client->dev);
		if (ret)
		goto error;
		}

		ret = i2c_smbus_read_byte_data(client, HD3SS3220_REG_DEV_REV);
		if (ret < 0)
		goto error;

		dev_info(&client->dev, "probed revision=0x%x\n", ret);

		return 0;
		error:
		typec_unregister_port(hd3ss3220->port);
		usb_role_switch_put(hd3ss3220->role_sw);

		return ret;
		}

		static int hd3ss3220_remove(struct i2c_client *client)
		{
		struct hd3ss3220 *hd3ss3220 = i2c_get_clientdata(client);

		typec_unregister_port(hd3ss3220->port);
		usb_role_switch_put(hd3ss3220->role_sw);

		return 0;
		}

		static const struct of_device_id dev_ids[] = {
		{ .compatible = "ti,hd3ss3220"},
		{}
		};
		MODULE_DEVICE_TABLE(of, dev_ids);

		static struct i2c_driver hd3ss3220_driver = {
		.driver = {
		.name = "hd3ss3220",
		.of_match_table = of_match_ptr(dev_ids),
		},
		.probe = hd3ss3220_probe,
		.remove = hd3ss3220_remove,
		};

		module_i2c_driver(hd3ss3220_driver);

		MODULE_AUTHOR("Biju Das <biju.das@bp.renesas.com>");
		MODULE_DESCRIPTION("TI HD3SS3220 DRP Port Controller Driver");
		MODULE_LICENSE("GPL");

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