[PATCH v8 04/12] usb: typec: Separate the definitions for data and power roles

From: Heikki Krogerus
Date: Wed Mar 14 2018 - 09:15:22 EST

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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@xxxxxxxxxxxx>
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
---
drivers/usb/typec/class.c | 56 ++++++++++++++++++++++---------------
drivers/usb/typec/fusb302/fusb302.c | 1 +
drivers/usb/typec/tcpm.c | 9 +++---
drivers/usb/typec/tps6598x.c | 26 +++++++++++------
drivers/usb/typec/typec_wcove.c | 1 +
drivers/usb/typec/ucsi/ucsi.c | 13 +++++++--
include/linux/usb/tcpm.h | 1 +
include/linux/usb/typec.h | 14 ++++++++--
8 files changed, 80 insertions(+), 41 deletions(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 2620a694704f..53df10df2f9d 100644
--- a/drivers/usb/typec/class.c
+++ b/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;
diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c
index da179aaf789e..f2d98c3c1f30 100644
--- a/drivers/usb/typec/fusb302/fusb302.c
+++ b/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,
};
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index cd48a99ee913..064b456dcf04 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -348,7 +348,7 @@ 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;
@@ -2236,7 +2236,7 @@ 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;
}

@@ -3526,11 +3526,11 @@ 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);
@@ -3720,6 +3720,7 @@ 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;
diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index 37a15c14a6c6..8b8406867c02 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/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);
diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c
index 2e990e0d917d..19cca7f1b2c5 100644
--- a/drivers/usb/typec/typec_wcove.c
+++ b/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,
};

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 69d544cfcd45..bf0977fbd100 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/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;
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index ca1c0b57f03f..5a5e1d8c5b65 100644
--- a/include/linux/usb/tcpm.h
+++ b/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 */

diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 2408e5c2ed91..672b39bb0adc 100644
--- a/include/linux/usb/typec.h
+++ b/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;
--
2.16.1

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