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From: jun.li@nxp.com
To: linux@roeck-us.net, heikki.krogerus@linux.intel.com
Cc: gregkh@linuxfoundation.org, jun.li@nxp.com, linux-imx@nxp.com,
	linux-usb@vger.kernel.org
Subject: [PATCH v2] usb: typec: tcpm: set correct data role for non-DRD
Date: Wed, 12 Feb 2020 14:00:03 +0800
Message-ID: <1581487203-27499-1-git-send-email-jun.li@nxp.com> (raw)

From: Li Jun <jun.li@nxp.com>

Since the typec port data role is separated from power role,
so check the port data capability when setting data role.

Signed-off-by: Li Jun <jun.li@nxp.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 53 ++++++++++++++++++++++++++++++++++---------
 1 file changed, 42 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index f3087ef..7009644 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -788,10 +788,30 @@ static int tcpm_set_roles(struct tcpm_port *port, bool attached,
 	else
 		orientation = TYPEC_ORIENTATION_REVERSE;
 
-	if (data == TYPEC_HOST)
-		usb_role = USB_ROLE_HOST;
-	else
-		usb_role = USB_ROLE_DEVICE;
+	if (port->typec_caps.data == TYPEC_PORT_DRD) {
+		if (data == TYPEC_HOST)
+			usb_role = USB_ROLE_HOST;
+		else
+			usb_role = USB_ROLE_DEVICE;
+	} else if (port->typec_caps.data == TYPEC_PORT_DFP) {
+		if (data == TYPEC_HOST) {
+			if (role == TYPEC_SOURCE)
+				usb_role = USB_ROLE_HOST;
+			else
+				usb_role = USB_ROLE_NONE;
+		} else {
+			return -ENOTSUPP;
+		}
+	} else {
+		if (data == TYPEC_DEVICE) {
+			if (role == TYPEC_SINK)
+				usb_role = USB_ROLE_DEVICE;
+			else
+				usb_role = USB_ROLE_NONE;
+		} else {
+			return -ENOTSUPP;
+		}
+	}
 
 	ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
 	if (ret < 0)
@@ -1817,7 +1837,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
 		tcpm_set_state(port, SOFT_RESET, 0);
 		break;
 	case PD_CTRL_DR_SWAP:
-		if (port->port_type != TYPEC_PORT_DRP) {
+		if (port->typec_caps.data != TYPEC_PORT_DRD) {
 			tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
 			break;
 		}
@@ -2609,6 +2629,9 @@ static int tcpm_src_attach(struct tcpm_port *port)
 	enum typec_cc_polarity polarity =
 				port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
 							 : TYPEC_POLARITY_CC1;
+	enum typec_data_role data_role =
+				port->typec_caps.data == TYPEC_PORT_UFP ?
+				TYPEC_DEVICE : TYPEC_HOST;
 	int ret;
 
 	if (port->attached)
@@ -2618,7 +2641,7 @@ static int tcpm_src_attach(struct tcpm_port *port)
 	if (ret < 0)
 		return ret;
 
-	ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
+	ret = tcpm_set_roles(port, true, TYPEC_SOURCE, data_role);
 	if (ret < 0)
 		return ret;
 
@@ -2730,6 +2753,9 @@ static void tcpm_src_detach(struct tcpm_port *port)
 
 static int tcpm_snk_attach(struct tcpm_port *port)
 {
+	enum typec_data_role data_role =
+				port->typec_caps.data == TYPEC_PORT_DFP ?
+				TYPEC_HOST : TYPEC_DEVICE;
 	int ret;
 
 	if (port->attached)
@@ -2740,7 +2766,7 @@ static int tcpm_snk_attach(struct tcpm_port *port)
 	if (ret < 0)
 		return ret;
 
-	ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
+	ret = tcpm_set_roles(port, true, TYPEC_SINK, data_role);
 	if (ret < 0)
 		return ret;
 
@@ -2761,12 +2787,15 @@ static void tcpm_snk_detach(struct tcpm_port *port)
 
 static int tcpm_acc_attach(struct tcpm_port *port)
 {
+	enum typec_data_role data_role =
+				port->typec_caps.data == TYPEC_PORT_UFP ?
+				TYPEC_DEVICE : TYPEC_HOST;
 	int ret;
 
 	if (port->attached)
 		return 0;
 
-	ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
+	ret = tcpm_set_roles(port, true, TYPEC_SOURCE, data_role);
 	if (ret < 0)
 		return ret;
 
@@ -3293,7 +3322,8 @@ static void run_state_machine(struct tcpm_port *port)
 		tcpm_set_vconn(port, true);
 		tcpm_set_vbus(port, false);
 		tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
-			       TYPEC_HOST);
+			       port->typec_caps.data == TYPEC_PORT_UFP ?
+			       TYPEC_DEVICE : TYPEC_HOST);
 		tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
 		break;
 	case SRC_HARD_RESET_VBUS_ON:
@@ -3308,7 +3338,8 @@ static void run_state_machine(struct tcpm_port *port)
 		if (port->pd_capable)
 			tcpm_set_charge(port, false);
 		tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
-			       TYPEC_DEVICE);
+			       port->typec_caps.data == TYPEC_PORT_DFP ?
+			       TYPEC_HOST : TYPEC_DEVICE);
 		/*
 		 * VBUS may or may not toggle, depending on the adapter.
 		 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
@@ -3969,7 +4000,7 @@ static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data)
 	mutex_lock(&port->swap_lock);
 	mutex_lock(&port->lock);
 
-	if (port->port_type != TYPEC_PORT_DRP) {
+	if (port->typec_caps.data != TYPEC_PORT_DRD) {
 		ret = -EINVAL;
 		goto port_unlock;
 	}
-- 
2.7.4


             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12  6:00 jun.li [this message]
2020-02-13 17:12 ` Heikki Krogerus
2020-02-13 17:42   ` Guenter Roeck

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