usb: typec: Separate the definitions for data and power roles

USB Type-C specification v1.2 separated the power and data
roles more clearly. Dual-Role-Data term was introduced, and
the meaning of DRP was changed from "Dual-Role-Port" to
"Dual-Role-Power".

In order to allow the port drivers to describe the
capabilities of the ports more clearly according to the
newest specifications, introducing separate definitions for
the data roles.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/class.c

@@ -282,10 +282,10 @@ typec_altmode_roles_show(struct device *dev, struct device_attribute *attr,
 	ssize_t ret;
 
 	switch (mode->roles) {
-	case TYPEC_PORT_DFP:
+	case TYPEC_PORT_SRC:
 		ret = sprintf(buf, "source\n");
 		break;
-	case TYPEC_PORT_UFP:
+	case TYPEC_PORT_SNK:
 		ret = sprintf(buf, "sink\n");
 		break;
 	case TYPEC_PORT_DRP:
@@ -797,14 +797,14 @@ static const char * const typec_data_roles[] = {
 };
 
 static const char * const typec_port_types[] = {
-	[TYPEC_PORT_DFP] = "source",
-	[TYPEC_PORT_UFP] = "sink",
+	[TYPEC_PORT_SRC] = "source",
+	[TYPEC_PORT_SNK] = "sink",
 	[TYPEC_PORT_DRP] = "dual",
 };
 
 static const char * const typec_port_types_drp[] = {
-	[TYPEC_PORT_DFP] = "dual [source] sink",
-	[TYPEC_PORT_UFP] = "dual source [sink]",
+	[TYPEC_PORT_SRC] = "dual [source] sink",
+	[TYPEC_PORT_SNK] = "dual source [sink]",
 	[TYPEC_PORT_DRP] = "[dual] source sink",
 };
 
@@ -875,9 +875,7 @@ static ssize_t data_role_store(struct device *dev,
 		return ret;
 
 	mutex_lock(&port->port_type_lock);
-	if (port->port_type != TYPEC_PORT_DRP) {
-		dev_dbg(dev, "port type fixed at \"%s\"",
-			     typec_port_types[port->port_type]);
+	if (port->cap->data != TYPEC_PORT_DRD) {
 		ret = -EOPNOTSUPP;
 		goto unlock_and_ret;
 	}
@@ -897,7 +895,7 @@ static ssize_t data_role_show(struct device *dev,
 {
 	struct typec_port *port = to_typec_port(dev);
 
-	if (port->cap->type == TYPEC_PORT_DRP)
+	if (port->cap->data == TYPEC_PORT_DRD)
 		return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
 			       "[host] device" : "host [device]");
 
@@ -1328,7 +1326,6 @@ struct typec_port *typec_register_port(struct device *parent,
 				       const struct typec_capability *cap)
 {
 	struct typec_port *port;
-	int role;
 	int ret;
 	int id;
 
@@ -1354,21 +1351,36 @@ struct typec_port *typec_register_port(struct device *parent,
 		goto err_mux;
 	}
 
-	if (cap->type == TYPEC_PORT_DFP)
-		role = TYPEC_SOURCE;
-	else if (cap->type == TYPEC_PORT_UFP)
-		role = TYPEC_SINK;
-	else
-		role = cap->prefer_role;
-
-	if (role == TYPEC_SOURCE) {
-		port->data_role = TYPEC_HOST;
+	switch (cap->type) {
+	case TYPEC_PORT_SRC:
 		port->pwr_role = TYPEC_SOURCE;
 		port->vconn_role = TYPEC_SOURCE;
-	} else {
-		port->data_role = TYPEC_DEVICE;
+		break;
+	case TYPEC_PORT_SNK:
 		port->pwr_role = TYPEC_SINK;
 		port->vconn_role = TYPEC_SINK;
+		break;
+	case TYPEC_PORT_DRP:
+		if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE)
+			port->pwr_role = cap->prefer_role;
+		else
+			port->pwr_role = TYPEC_SINK;
+		break;
+	}
+
+	switch (cap->data) {
+	case TYPEC_PORT_DFP:
+		port->data_role = TYPEC_HOST;
+		break;
+	case TYPEC_PORT_UFP:
+		port->data_role = TYPEC_DEVICE;
+		break;
+	case TYPEC_PORT_DRD:
+		if (cap->prefer_role == TYPEC_SOURCE)
+			port->data_role = TYPEC_HOST;
+		else
+			port->data_role = TYPEC_DEVICE;
+		break;
 	}
 
 	port->id = id;

drivers/usb/typec/fusb302/fusb302.c

@@ -1219,6 +1219,7 @@ static const struct tcpc_config fusb302_tcpc_config = {
 	.max_snk_mw = 15000,
 	.operating_snk_mw = 2500,
 	.type = TYPEC_PORT_DRP,
+	.data = TYPEC_PORT_DRD,
 	.default_role = TYPEC_SINK,
 	.alt_modes = NULL,
 };

drivers/usb/typec/tcpm.c

@@ -345,7 +345,7 @@ static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
 		else if (port->tcpc->config->default_role == TYPEC_SINK)
 			return SNK_UNATTACHED;
 		/* Fall through to return SRC_UNATTACHED */
-	} else if (port->port_type == TYPEC_PORT_UFP) {
+	} else if (port->port_type == TYPEC_PORT_SNK) {
 		return SNK_UNATTACHED;
 	}
 	return SRC_UNATTACHED;
@@ -2179,7 +2179,7 @@ static inline enum tcpm_state unattached_state(struct tcpm_port *port)
 			return SRC_UNATTACHED;
 		else
 			return SNK_UNATTACHED;
-	} else if (port->port_type == TYPEC_PORT_DFP) {
+	} else if (port->port_type == TYPEC_PORT_SRC) {
 		return SRC_UNATTACHED;
 	}
 
@@ -3469,11 +3469,11 @@ static int tcpm_port_type_set(const struct typec_capability *cap,
 
 	if (!port->connected) {
 		tcpm_set_state(port, PORT_RESET, 0);
-	} else if (type == TYPEC_PORT_UFP) {
+	} else if (type == TYPEC_PORT_SNK) {
 		if (!(port->pwr_role == TYPEC_SINK &&
 		      port->data_role == TYPEC_DEVICE))
 			tcpm_set_state(port, PORT_RESET, 0);
-	} else if (type == TYPEC_PORT_DFP) {
+	} else if (type == TYPEC_PORT_SRC) {
 		if (!(port->pwr_role == TYPEC_SOURCE &&
 		      port->data_role == TYPEC_HOST))
 			tcpm_set_state(port, PORT_RESET, 0);
@@ -3641,6 +3641,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
 
 	port->typec_caps.prefer_role = tcpc->config->default_role;
 	port->typec_caps.type = tcpc->config->type;
+	port->typec_caps.data = tcpc->config->data;
 	port->typec_caps.revision = 0x0120;	/* Type-C spec release 1.2 */
 	port->typec_caps.pd_revision = 0x0200;	/* USB-PD spec release 2.0 */
 	port->typec_caps.dr_set = tcpm_dr_set;

drivers/usb/typec/tps6598x.c

@@ -393,31 +393,39 @@ static int tps6598x_probe(struct i2c_client *client)
 	if (ret < 0)
 		return ret;
 
+	tps->typec_cap.revision = USB_TYPEC_REV_1_2;
+	tps->typec_cap.pd_revision = 0x200;
+	tps->typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
+	tps->typec_cap.pr_set = tps6598x_pr_set;
+	tps->typec_cap.dr_set = tps6598x_dr_set;
+
 	switch (TPS_SYSCONF_PORTINFO(conf)) {
 	case TPS_PORTINFO_SINK_ACCESSORY:
 	case TPS_PORTINFO_SINK:
-		tps->typec_cap.type = TYPEC_PORT_UFP;
+		tps->typec_cap.type = TYPEC_PORT_SNK;
+		tps->typec_cap.data = TYPEC_PORT_UFP;
 		break;
 	case TPS_PORTINFO_DRP_UFP_DRD:
 	case TPS_PORTINFO_DRP_DFP_DRD:
-		tps->typec_cap.dr_set = tps6598x_dr_set;
-		/* fall through */
+		tps->typec_cap.type = TYPEC_PORT_DRP;
+		tps->typec_cap.data = TYPEC_PORT_DRD;
+		break;
 	case TPS_PORTINFO_DRP_UFP:
+		tps->typec_cap.type = TYPEC_PORT_DRP;
+		tps->typec_cap.data = TYPEC_PORT_UFP;
+		break;
 	case TPS_PORTINFO_DRP_DFP:
-		tps->typec_cap.pr_set = tps6598x_pr_set;
 		tps->typec_cap.type = TYPEC_PORT_DRP;
+		tps->typec_cap.data = TYPEC_PORT_DFP;
 		break;
 	case TPS_PORTINFO_SOURCE:
-		tps->typec_cap.type = TYPEC_PORT_DFP;
+		tps->typec_cap.type = TYPEC_PORT_SRC;
+		tps->typec_cap.data = TYPEC_PORT_DFP;
 		break;
 	default:
 		return -ENODEV;
 	}
 
-	tps->typec_cap.revision = USB_TYPEC_REV_1_2;
-	tps->typec_cap.pd_revision = 0x200;
-	tps->typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
-
 	tps->port = typec_register_port(&client->dev, &tps->typec_cap);
 	if (IS_ERR(tps->port))
 		return PTR_ERR(tps->port);

drivers/usb/typec/typec_wcove.c

@@ -572,6 +572,7 @@ static struct tcpc_config wcove_typec_config = {
 	.operating_snk_mw = 15000,
 
 	.type = TYPEC_PORT_DRP,
+	.data = TYPEC_PORT_DRD,
 	.default_role = TYPEC_SINK,
 };
 

drivers/usb/typec/ucsi/ucsi.c

@@ -592,11 +592,18 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 		return ret;
 
 	if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DRP)
-		cap->type = TYPEC_PORT_DRP;
+		cap->data = TYPEC_PORT_DRD;
 	else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DFP)
-		cap->type = TYPEC_PORT_DFP;
+		cap->data = TYPEC_PORT_DFP;
 	else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_UFP)
-		cap->type = TYPEC_PORT_UFP;
+		cap->data = TYPEC_PORT_UFP;
+
+	if (con->cap.provider && con->cap.consumer)
+		cap->type = TYPEC_PORT_DRP;
+	else if (con->cap.provider)
+		cap->type = TYPEC_PORT_SRC;
+	else if (con->cap.consumer)
+		cap->type = TYPEC_PORT_SNK;
 
 	cap->revision = ucsi->cap.typec_version;
 	cap->pd_revision = ucsi->cap.pd_version;

include/linux/usb/tcpm.h

@@ -91,6 +91,7 @@ struct tcpc_config {
 	unsigned int operating_snk_mw;
 
 	enum typec_port_type type;
+	enum typec_port_data data;
 	enum typec_role default_role;
 	bool try_role_hw;	/* try.{src,snk} implemented in hardware */
 

include/linux/usb/typec.h

@@ -22,9 +22,15 @@ struct typec_port;
 struct fwnode_handle;
 
 enum typec_port_type {
+	TYPEC_PORT_SRC,
+	TYPEC_PORT_SNK,
+	TYPEC_PORT_DRP,
+};
+
+enum typec_port_data {
 	TYPEC_PORT_DFP,
 	TYPEC_PORT_UFP,
-	TYPEC_PORT_DRP,
+	TYPEC_PORT_DRD,
 };
 
 enum typec_plug_type {
@@ -186,10 +192,11 @@ struct typec_partner_desc {
 
 /*
  * struct typec_capability - USB Type-C Port Capabilities
- * @role: DFP (Host-only), UFP (Device-only) or DRP (Dual Role)
+ * @type: Supported power role of the port
+ * @data: Supported data role of the port
  * @revision: USB Type-C Specification release. Binary coded decimal
  * @pd_revision: USB Power Delivery Specification revision if supported
- * @prefer_role: Initial role preference
+ * @prefer_role: Initial role preference (DRP ports).
  * @accessory: Supported Accessory Modes
  * @sw: Cable plug orientation switch
  * @mux: Multiplexer switch for Alternate/Accessory Modes
@@ -205,6 +212,7 @@ struct typec_partner_desc {
  */
 struct typec_capability {
 	enum typec_port_type	type;
+	enum typec_port_data	data;
 	u16			revision; /* 0120H = "1.2" */
 	u16			pd_revision; /* 0300H = "3.0" */
 	int			prefer_role;