Driver for TI HD3SS3220 USB Type-C DRP port controller.
The driver currently registers the port and supports data role swapping.
Signed-off-by: Biju Das <biju.das@xxxxxxxxxxxxxx>
---
V1-->V2
* Driver uses usb role class instead of extcon for dual role switch
and also handles connect/disconnect events.
---
drivers/usb/typec/Kconfig | 10 ++
drivers/usb/typec/Makefile | 1 +
drivers/usb/typec/hd3ss3220.c | 266 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 277 insertions(+)
create mode 100644 drivers/usb/typec/hd3ss3220.c
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
index 89d9193..92a3717 100644
--- a/drivers/usb/typec/Kconfig
+++ b/drivers/usb/typec/Kconfig
@@ -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
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index 6696b72..7753a5c3 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -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/
diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
new file mode 100644
index 0000000..e7a2012
--- /dev/null
+++ b/drivers/usb/typec/hd3ss3220.c
@@ -0,0 +1,266 @@
+// 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/of.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)
+{
+ unsigned int reg_val;
+ int ret;
+
+ ret = regmap_read(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, ®_val);
+ if (ret < 0)
+ return ret;
+
+ reg_val &= ~HD3SS3220_REG_GEN_CTRL_SRC_PREF_MASK;
+ reg_val |= src_pref;
+
+ return regmap_write(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, reg_val);
+}
+
+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,
+ ®_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;
+ }
+
+ 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_val);
+
+ 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;
+ unsigned int data;
+
+ hd3ss3220_set_role(hd3ss3220);
+
+ err = regmap_read(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT_CTRL, &data);
+ if (err < 0)
+ return IRQ_NONE;
+
+ err = regmap_write(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT_CTRL,
+ data | HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS);
+ 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;
+ 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->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);
+ hd3ss3220->role_sw = usb_role_switch_get(&client->dev);
+ if (IS_ERR(hd3ss3220->role_sw))
+ return PTR_ERR(hd3ss3220->role_sw);
+
+ hd3ss3220->dev = &client->dev;
+ 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);
+ if (client->irq > 0) {
+ 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;
+ }
+
+ 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",
+ .owner = THIS_MODULE,
+ .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@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("TI HD3SS3220 DRP Port Controller Driver");
+MODULE_LICENSE("GPL");
--
2.7.4
