[PATCH v3 0/9] usb: typec: Small API improvement

[PATCH v3 0/9] usb: typec: Small API improvement

[Heikki Krogerus]

Hi,

The broken conditions in the *_store() functions should now be fixed.

Cover letter from v2:

In this version there should be no more semantic changes.

The original cover letter:

This series moves the callback members from struct typec_capabilities
to a new struct typec_operations. That removes the need for the
drivers to keep a copy of the struct typec_capabilites if they don't
need it, and struct typec_operations can probable always be
constified.

The change is small, however I think the code ends up being a bit more
cleaner looking this way. Let me know if it's OK.

thanks,

Heikki Krogerus (9):
  usb: typec: Copy everything from struct typec_capability during
    registration
  usb: typec: Introduce typec_get_drvdata()
  usb: typec: Separate the operations vector
  usb: typec: tcpm: Start using struct typec_operations
  usb: typec: tps6598x: Start using struct typec_operations
  usb: typec: ucsi: Start using struct typec_operations
  usb: typec: hd3ss3220: Start using struct typec_operations
  usb: typec: Remove the callback members from struct typec_capability
  usb: typec: Remove unused members from struct typec_capability

 drivers/usb/typec/class.c     | 37 ++++++++++++++++++--------
 drivers/usb/typec/hd3ss3220.c | 24 +++++++++--------
 drivers/usb/typec/tcpm/tcpm.c | 45 ++++++++++++++------------------
 drivers/usb/typec/tps6598x.c  | 49 +++++++++++++++++++----------------
 drivers/usb/typec/ucsi/ucsi.c | 22 ++++++++--------
 include/linux/usb/typec.h     | 41 ++++++++++++++++-------------
 6 files changed, 119 insertions(+), 99 deletions(-)

-- 
2.23.0

[PATCH v3 1/9] usb: typec: Copy everything from struct typec_capability during registration

[Heikki Krogerus]

Copying everything from struct typec_capability to struct
typec_port during port registration. This will make sure
that under no circumstances the driver can change the values
in the struct typec_capability that the port uses.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/usb/typec/class.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 94a3eda62add..0bbf10c8ad58 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -52,6 +52,7 @@ struct typec_port {
 	struct typec_switch		*sw;
 	struct typec_mux		*mux;
 
+	const struct typec_capability	*orig_cap; /* to be removed */
 	const struct typec_capability	*cap;
 };
 
@@ -968,7 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
 			return -EINVAL;
 	}
 
-	ret = port->cap->try_role(port->cap, role);
+	ret = port->cap->try_role(port->orig_cap, role);
 	if (ret)
 		return ret;
 
@@ -1014,7 +1015,7 @@ static ssize_t data_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->dr_set(port->cap, ret);
+	ret = port->cap->dr_set(port->orig_cap, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1071,7 +1072,7 @@ static ssize_t power_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->pr_set(port->cap, ret);
+	ret = port->cap->pr_set(port->orig_cap, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1119,7 +1120,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->port_type_set(port->cap, type);
+	ret = port->cap->port_type_set(port->orig_cap, type);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1184,7 +1185,7 @@ static ssize_t vconn_source_store(struct device *dev,
 	if (ret)
 		return ret;
 
-	ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
+	ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source);
 	if (ret)
 		return ret;
 
@@ -1278,6 +1279,7 @@ static void typec_release(struct device *dev)
 	ida_destroy(&port->mode_ids);
 	typec_switch_put(port->sw);
 	typec_mux_put(port->mux);
+	kfree(port->cap);
 	kfree(port);
 }
 
@@ -1579,9 +1581,10 @@ struct typec_port *typec_register_port(struct device *parent,
 	mutex_init(&port->port_type_lock);
 
 	port->id = id;
-	port->cap = cap;
+	port->orig_cap = cap;
 	port->port_type = cap->type;
 	port->prefer_role = cap->prefer_role;
+	port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
 
 	device_initialize(&port->dev);
 	port->dev.class = typec_class;
-- 
2.23.0

[PATCH v3 2/9] usb: typec: Introduce typec_get_drvdata()

[Heikki Krogerus]

Leaving the private driver_data pointer of the port device
to the port drivers.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/usb/typec/class.c | 11 +++++++++++
 include/linux/usb/typec.h |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 0bbf10c8ad58..89ffe370e426 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1488,6 +1488,16 @@ EXPORT_SYMBOL_GPL(typec_set_mode);
 
 /* --------------------------------------- */
 
+/**
+ * typec_get_drvdata - Return private driver data pointer
+ * @port: USB Type-C port
+ */
+void *typec_get_drvdata(struct typec_port *port)
+{
+	return dev_get_drvdata(&port->dev);
+}
+EXPORT_SYMBOL_GPL(typec_get_drvdata);
+
 /**
  * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
  * @port: USB Type-C Port that supports the alternate mode
@@ -1592,6 +1602,7 @@ struct typec_port *typec_register_port(struct device *parent,
 	port->dev.fwnode = cap->fwnode;
 	port->dev.type = &typec_port_dev_type;
 	dev_set_name(&port->dev, "port%d", id);
+	dev_set_drvdata(&port->dev, cap->driver_data);
 
 	port->sw = typec_switch_get(&port->dev);
 	if (IS_ERR(port->sw)) {
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 7df4ecabc78a..8b90cd77331c 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -179,6 +179,7 @@ struct typec_partner_desc {
  * @sw: Cable plug orientation switch
  * @mux: Multiplexer switch for Alternate/Accessory Modes
  * @fwnode: Optional fwnode of the port
+ * @driver_data: Private pointer for driver specific info
  * @try_role: Set data role preference for DRP port
  * @dr_set: Set Data Role
  * @pr_set: Set Power Role
@@ -198,6 +199,7 @@ struct typec_capability {
 	struct typec_switch	*sw;
 	struct typec_mux	*mux;
 	struct fwnode_handle	*fwnode;
+	void			*driver_data;
 
 	int		(*try_role)(const struct typec_capability *,
 				    int role);
@@ -241,6 +243,8 @@ int typec_set_orientation(struct typec_port *port,
 enum typec_orientation typec_get_orientation(struct typec_port *port);
 int typec_set_mode(struct typec_port *port, int mode);
 
+void *typec_get_drvdata(struct typec_port *port);
+
 int typec_find_port_power_role(const char *name);
 int typec_find_power_role(const char *name);
 int typec_find_port_data_role(const char *name);
-- 
2.23.0

[PATCH v3 3/9] usb: typec: Separate the operations vector

[Heikki Krogerus]

Introducing struct typec_operations which has the same
callbacks as struct typec_capability. The old callbacks are
kept for now, but after all users have been converted, they
will be removed.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/usb/typec/class.c | 39 +++++++++++++++++++++++++++++----------
 include/linux/usb/typec.h | 20 ++++++++++++++++++++
 2 files changed, 49 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 89ffe370e426..11ed3dc6fc49 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -54,6 +54,7 @@ struct typec_port {
 
 	const struct typec_capability	*orig_cap; /* to be removed */
 	const struct typec_capability	*cap;
+	const struct typec_operations   *ops;
 };
 
 #define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
@@ -956,7 +957,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->try_role) {
+	if (!port->cap->try_role && (!port->ops || !port->ops->try_role)) {
 		dev_dbg(dev, "Setting preferred role not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -969,7 +970,10 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
 			return -EINVAL;
 	}
 
-	ret = port->cap->try_role(port->orig_cap, role);
+	if (port->ops && port->ops->try_role)
+		ret = port->ops->try_role(port, role);
+	else
+		ret = port->cap->try_role(port->orig_cap, role);
 	if (ret)
 		return ret;
 
@@ -1000,7 +1004,7 @@ static ssize_t data_role_store(struct device *dev,
 	struct typec_port *port = to_typec_port(dev);
 	int ret;
 
-	if (!port->cap->dr_set) {
+	if (!port->cap->dr_set && (!port->ops || !port->ops->dr_set)) {
 		dev_dbg(dev, "data role swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1015,7 +1019,10 @@ static ssize_t data_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->dr_set(port->orig_cap, ret);
+	if (port->ops && port->ops->dr_set)
+		ret = port->ops->dr_set(port, ret);
+	else
+		ret = port->cap->dr_set(port->orig_cap, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1050,7 +1057,7 @@ static ssize_t power_role_store(struct device *dev,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->pr_set) {
+	if (!port->cap->pr_set && (!port->ops || !port->ops->pr_set)) {
 		dev_dbg(dev, "power role swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1072,7 +1079,10 @@ static ssize_t power_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->pr_set(port->orig_cap, ret);
+	if (port->ops && port->ops->dr_set)
+		ret = port->ops->pr_set(port, ret);
+	else
+		ret = port->cap->pr_set(port->orig_cap, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1103,7 +1113,8 @@ port_type_store(struct device *dev, struct device_attribute *attr,
 	int ret;
 	enum typec_port_type type;
 
-	if (!port->cap->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
+	if (port->cap->type != TYPEC_PORT_DRP || (!port->cap->port_type_set &&
+	    (!port->ops || !port->ops->port_type_set))) {
 		dev_dbg(dev, "changing port type not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1120,7 +1131,10 @@ port_type_store(struct device *dev, struct device_attribute *attr,
 		goto unlock_and_ret;
 	}
 
-	ret = port->cap->port_type_set(port->orig_cap, type);
+	if (port->ops && port->ops->port_type_set)
+		ret = port->ops->port_type_set(port, type);
+	else
+		ret = port->cap->port_type_set(port->orig_cap, type);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1176,7 +1190,7 @@ static ssize_t vconn_source_store(struct device *dev,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->vconn_set) {
+	if (!port->cap->vconn_set && (!port->ops || !port->ops->vconn_set)) {
 		dev_dbg(dev, "VCONN swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1185,7 +1199,11 @@ static ssize_t vconn_source_store(struct device *dev,
 	if (ret)
 		return ret;
 
-	ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source);
+	if (port->ops && port->ops->vconn_set)
+		ret = port->ops->vconn_set(port, (enum typec_role)source);
+	else
+		ret = port->cap->vconn_set(port->orig_cap,
+					   (enum typec_role)source);
 	if (ret)
 		return ret;
 
@@ -1591,6 +1609,7 @@ struct typec_port *typec_register_port(struct device *parent,
 	mutex_init(&port->port_type_lock);
 
 	port->id = id;
+	port->ops = cap->ops;
 	port->orig_cap = cap;
 	port->port_type = cap->type;
 	port->prefer_role = cap->prefer_role;
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 8b90cd77331c..c9bef128453b 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -168,6 +168,23 @@ struct typec_partner_desc {
 	struct usb_pd_identity	*identity;
 };
 
+/**
+ * struct typec_operations - USB Type-C Port Operations
+ * @try_role: Set data role preference for DRP port
+ * @dr_set: Set Data Role
+ * @pr_set: Set Power Role
+ * @vconn_set: Source VCONN
+ * @port_type_set: Set port type
+ */
+struct typec_operations {
+	int (*try_role)(struct typec_port *port, int role);
+	int (*dr_set)(struct typec_port *port, enum typec_data_role role);
+	int (*pr_set)(struct typec_port *port, enum typec_role role);
+	int (*vconn_set)(struct typec_port *port, enum typec_role role);
+	int (*port_type_set)(struct typec_port *port,
+			     enum typec_port_type type);
+};
+
 /*
  * struct typec_capability - USB Type-C Port Capabilities
  * @type: Supported power role of the port
@@ -180,6 +197,7 @@ struct typec_partner_desc {
  * @mux: Multiplexer switch for Alternate/Accessory Modes
  * @fwnode: Optional fwnode of the port
  * @driver_data: Private pointer for driver specific info
+ * @ops: Port operations vector
  * @try_role: Set data role preference for DRP port
  * @dr_set: Set Data Role
  * @pr_set: Set Power Role
@@ -201,6 +219,8 @@ struct typec_capability {
 	struct fwnode_handle	*fwnode;
 	void			*driver_data;
 
+	const struct typec_operations	*ops;
+
 	int		(*try_role)(const struct typec_capability *,
 				    int role);
 
-- 
2.23.0

[PATCH v3 4/9] usb: typec: tcpm: Start using struct typec_operations

[Heikki Krogerus]

Supplying the operation callbacks as part of a struct
typec_operations instead of as part of struct
typec_capability during port registration.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/usb/typec/tcpm/tcpm.c | 45 ++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 5f61d9977a15..bc9edb4c013b 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -390,12 +390,6 @@ static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
 	return SRC_UNATTACHED;
 }
 
-static inline
-struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
-{
-	return container_of(cap, struct tcpm_port, typec_caps);
-}
-
 static bool tcpm_port_is_disconnected(struct tcpm_port *port)
 {
 	return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
@@ -3970,10 +3964,9 @@ void tcpm_pd_hard_reset(struct tcpm_port *port)
 }
 EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
 
-static int tcpm_dr_set(const struct typec_capability *cap,
-		       enum typec_data_role data)
+static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data)
 {
-	struct tcpm_port *port = typec_cap_to_tcpm(cap);
+	struct tcpm_port *port = typec_get_drvdata(p);
 	int ret;
 
 	mutex_lock(&port->swap_lock);
@@ -4038,10 +4031,9 @@ static int tcpm_dr_set(const struct typec_capability *cap,
 	return ret;
 }
 
-static int tcpm_pr_set(const struct typec_capability *cap,
-		       enum typec_role role)
+static int tcpm_pr_set(struct typec_port *p, enum typec_role role)
 {
-	struct tcpm_port *port = typec_cap_to_tcpm(cap);
+	struct tcpm_port *port = typec_get_drvdata(p);
 	int ret;
 
 	mutex_lock(&port->swap_lock);
@@ -4082,10 +4074,9 @@ static int tcpm_pr_set(const struct typec_capability *cap,
 	return ret;
 }
 
-static int tcpm_vconn_set(const struct typec_capability *cap,
-			  enum typec_role role)
+static int tcpm_vconn_set(struct typec_port *p, enum typec_role role)
 {
-	struct tcpm_port *port = typec_cap_to_tcpm(cap);
+	struct tcpm_port *port = typec_get_drvdata(p);
 	int ret;
 
 	mutex_lock(&port->swap_lock);
@@ -4122,9 +4113,9 @@ static int tcpm_vconn_set(const struct typec_capability *cap,
 	return ret;
 }
 
-static int tcpm_try_role(const struct typec_capability *cap, int role)
+static int tcpm_try_role(struct typec_port *p, int role)
 {
-	struct tcpm_port *port = typec_cap_to_tcpm(cap);
+	struct tcpm_port *port = typec_get_drvdata(p);
 	struct tcpc_dev	*tcpc = port->tcpc;
 	int ret = 0;
 
@@ -4331,10 +4322,9 @@ static void tcpm_init(struct tcpm_port *port)
 	tcpm_set_state(port, PORT_RESET, 0);
 }
 
-static int tcpm_port_type_set(const struct typec_capability *cap,
-			      enum typec_port_type type)
+static int tcpm_port_type_set(struct typec_port *p, enum typec_port_type type)
 {
-	struct tcpm_port *port = typec_cap_to_tcpm(cap);
+	struct tcpm_port *port = typec_get_drvdata(p);
 
 	mutex_lock(&port->lock);
 	if (type == port->port_type)
@@ -4359,6 +4349,14 @@ static int tcpm_port_type_set(const struct typec_capability *cap,
 	return 0;
 }
 
+static const struct typec_operations tcpm_ops = {
+	.try_role = tcpm_try_role,
+	.dr_set = tcpm_dr_set,
+	.pr_set = tcpm_pr_set,
+	.vconn_set = tcpm_vconn_set,
+	.port_type_set = tcpm_port_type_set
+};
+
 void tcpm_tcpc_reset(struct tcpm_port *port)
 {
 	mutex_lock(&port->lock);
@@ -4772,11 +4770,8 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
 	port->typec_caps.fwnode = tcpc->fwnode;
 	port->typec_caps.revision = 0x0120;	/* Type-C spec release 1.2 */
 	port->typec_caps.pd_revision = 0x0300;	/* USB-PD spec release 3.0 */
-	port->typec_caps.dr_set = tcpm_dr_set;
-	port->typec_caps.pr_set = tcpm_pr_set;
-	port->typec_caps.vconn_set = tcpm_vconn_set;
-	port->typec_caps.try_role = tcpm_try_role;
-	port->typec_caps.port_type_set = tcpm_port_type_set;
+	port->typec_caps.driver_data = port;
+	port->typec_caps.ops = &tcpm_ops;
 
 	port->partner_desc.identity = &port->partner_ident;
 	port->port_type = port->typec_caps.type;
-- 
2.23.0

[PATCH v3 5/9] usb: typec: tps6598x: Start using struct typec_operations

[Heikki Krogerus]

Supplying the operation callbacks as part of a struct
typec_operations instead of as part of struct
typec_capability during port registration. After this there
is not need to keep the capabilities stored anywhere in the
driver.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/usb/typec/tps6598x.c | 49 +++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 23 deletions(-)

diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index a38d1409f15b..0698addd1185 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -94,7 +94,6 @@ struct tps6598x {
 	struct typec_port *port;
 	struct typec_partner *partner;
 	struct usb_pd_identity partner_identity;
-	struct typec_capability typec_cap;
 };
 
 /*
@@ -307,11 +306,10 @@ static int tps6598x_exec_cmd(struct tps6598x *tps, const char *cmd,
 	return 0;
 }
 
-static int
-tps6598x_dr_set(const struct typec_capability *cap, enum typec_data_role role)
+static int tps6598x_dr_set(struct typec_port *port, enum typec_data_role role)
 {
-	struct tps6598x *tps = container_of(cap, struct tps6598x, typec_cap);
 	const char *cmd = (role == TYPEC_DEVICE) ? "SWUF" : "SWDF";
+	struct tps6598x *tps = typec_get_drvdata(port);
 	u32 status;
 	int ret;
 
@@ -338,11 +336,10 @@ tps6598x_dr_set(const struct typec_capability *cap, enum typec_data_role role)
 	return ret;
 }
 
-static int
-tps6598x_pr_set(const struct typec_capability *cap, enum typec_role role)
+static int tps6598x_pr_set(struct typec_port *port, enum typec_role role)
 {
-	struct tps6598x *tps = container_of(cap, struct tps6598x, typec_cap);
 	const char *cmd = (role == TYPEC_SINK) ? "SWSk" : "SWSr";
+	struct tps6598x *tps = typec_get_drvdata(port);
 	u32 status;
 	int ret;
 
@@ -369,6 +366,11 @@ tps6598x_pr_set(const struct typec_capability *cap, enum typec_role role)
 	return ret;
 }
 
+static const struct typec_operations tps6598x_ops = {
+	.dr_set = tps6598x_dr_set,
+	.pr_set = tps6598x_pr_set,
+};
+
 static irqreturn_t tps6598x_interrupt(int irq, void *data)
 {
 	struct tps6598x *tps = data;
@@ -448,6 +450,7 @@ static const struct regmap_config tps6598x_regmap_config = {
 
 static int tps6598x_probe(struct i2c_client *client)
 {
+	struct typec_capability typec_cap = { };
 	struct tps6598x *tps;
 	u32 status;
 	u32 conf;
@@ -492,40 +495,40 @@ 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;
+	typec_cap.revision = USB_TYPEC_REV_1_2;
+	typec_cap.pd_revision = 0x200;
+	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
+	typec_cap.driver_data = tps;
+	typec_cap.ops = &tps6598x_ops;
 
 	switch (TPS_SYSCONF_PORTINFO(conf)) {
 	case TPS_PORTINFO_SINK_ACCESSORY:
 	case TPS_PORTINFO_SINK:
-		tps->typec_cap.type = TYPEC_PORT_SNK;
-		tps->typec_cap.data = TYPEC_PORT_UFP;
+		typec_cap.type = TYPEC_PORT_SNK;
+		typec_cap.data = TYPEC_PORT_UFP;
 		break;
 	case TPS_PORTINFO_DRP_UFP_DRD:
 	case TPS_PORTINFO_DRP_DFP_DRD:
-		tps->typec_cap.type = TYPEC_PORT_DRP;
-		tps->typec_cap.data = TYPEC_PORT_DRD;
+		typec_cap.type = TYPEC_PORT_DRP;
+		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;
+		typec_cap.type = TYPEC_PORT_DRP;
+		typec_cap.data = TYPEC_PORT_UFP;
 		break;
 	case TPS_PORTINFO_DRP_DFP:
-		tps->typec_cap.type = TYPEC_PORT_DRP;
-		tps->typec_cap.data = TYPEC_PORT_DFP;
+		typec_cap.type = TYPEC_PORT_DRP;
+		typec_cap.data = TYPEC_PORT_DFP;
 		break;
 	case TPS_PORTINFO_SOURCE:
-		tps->typec_cap.type = TYPEC_PORT_SRC;
-		tps->typec_cap.data = TYPEC_PORT_DFP;
+		typec_cap.type = TYPEC_PORT_SRC;
+		typec_cap.data = TYPEC_PORT_DFP;
 		break;
 	default:
 		return -ENODEV;
 	}
 
-	tps->port = typec_register_port(&client->dev, &tps->typec_cap);
+	tps->port = typec_register_port(&client->dev, &typec_cap);
 	if (IS_ERR(tps->port))
 		return PTR_ERR(tps->port);
 
-- 
2.23.0

[PATCH v3 6/9] usb: typec: ucsi: Start using struct typec_operations

[Heikki Krogerus]

Supplying the operation callbacks as part of a struct
typec_operations instead of as part of struct
typec_capability during port registration.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/usb/typec/ucsi/ucsi.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index ba288b964dc8..edd722fb88b8 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -17,9 +17,6 @@
 #include "ucsi.h"
 #include "trace.h"
 
-#define to_ucsi_connector(_cap_) container_of(_cap_, struct ucsi_connector, \
-					      typec_cap)
-
 /*
  * UCSI_TIMEOUT_MS - PPM communication timeout
  *
@@ -713,10 +710,9 @@ static int ucsi_role_cmd(struct ucsi_connector *con, struct ucsi_control *ctrl)
 	return ret;
 }
 
-static int
-ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
+static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role)
 {
-	struct ucsi_connector *con = to_ucsi_connector(cap);
+	struct ucsi_connector *con = typec_get_drvdata(port);
 	struct ucsi_control ctrl;
 	int ret = 0;
 
@@ -748,10 +744,9 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
 	return ret < 0 ? ret : 0;
 }
 
-static int
-ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
+static int ucsi_pr_swap(struct typec_port *port, enum typec_role role)
 {
-	struct ucsi_connector *con = to_ucsi_connector(cap);
+	struct ucsi_connector *con = typec_get_drvdata(port);
 	struct ucsi_control ctrl;
 	int ret = 0;
 
@@ -788,6 +783,11 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
 	return ret;
 }
 
+static const struct typec_operations ucsi_ops = {
+	.dr_set = ucsi_dr_swap,
+	.pr_set = ucsi_pr_swap
+};
+
 static struct fwnode_handle *ucsi_find_fwnode(struct ucsi_connector *con)
 {
 	struct fwnode_handle *fwnode;
@@ -843,8 +843,8 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 		*accessory = TYPEC_ACCESSORY_DEBUG;
 
 	cap->fwnode = ucsi_find_fwnode(con);
-	cap->dr_set = ucsi_dr_swap;
-	cap->pr_set = ucsi_pr_swap;
+	cap->driver_data = con;
+	cap->ops = &ucsi_ops;
 
 	/* Register the connector */
 	con->port = typec_register_port(ucsi->dev, cap);
-- 
2.23.0

[PATCH v3 7/9] usb: typec: hd3ss3220: Start using struct typec_operations

[Heikki Krogerus]

Supplying the operation callbacks as part of a struct
typec_operations instead of as part of struct
typec_capability during port registration. After this there
is not need to keep the capabilities stored anywhere in the
driver.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/usb/typec/hd3ss3220.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
index 1900910c637e..7c3ee9d28670 100644
--- a/drivers/usb/typec/hd3ss3220.c
+++ b/drivers/usb/typec/hd3ss3220.c
@@ -38,7 +38,6 @@ struct hd3ss3220 {
 	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)
@@ -74,11 +73,9 @@ static enum usb_role hd3ss3220_get_attached_state(struct hd3ss3220 *hd3ss3220)
 	return attached_state;
 }
 
-static int hd3ss3220_dr_set(const struct typec_capability *cap,
-			    enum typec_data_role role)
+static int hd3ss3220_dr_set(struct typec_port *port, enum typec_data_role role)
 {
-	struct hd3ss3220 *hd3ss3220 = container_of(cap, struct hd3ss3220,
-						   typec_cap);
+	struct hd3ss3220 *hd3ss3220 = typec_get_drvdata(port);
 	enum usb_role role_val;
 	int pref, ret = 0;
 
@@ -99,6 +96,10 @@ static int hd3ss3220_dr_set(const struct typec_capability *cap,
 	return ret;
 }
 
+static const struct typec_operations hd3ss3220_ops = {
+	.dr_set = hd3ss3220_dr_set
+};
+
 static void hd3ss3220_set_role(struct hd3ss3220 *hd3ss3220)
 {
 	enum usb_role role_state = hd3ss3220_get_attached_state(hd3ss3220);
@@ -153,6 +154,7 @@ static const struct regmap_config config = {
 static int hd3ss3220_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
+	struct typec_capability typec_cap = { };
 	struct hd3ss3220 *hd3ss3220;
 	struct fwnode_handle *connector;
 	int ret;
@@ -181,13 +183,13 @@ static int hd3ss3220_probe(struct i2c_client *client,
 	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;
+	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
+	typec_cap.driver_data = hd3ss3220;
+	typec_cap.type = TYPEC_PORT_DRP;
+	typec_cap.data = TYPEC_PORT_DRD;
+	typec_cap.ops = &hd3ss3220_ops;
 
-	hd3ss3220->port = typec_register_port(&client->dev,
-					      &hd3ss3220->typec_cap);
+	hd3ss3220->port = typec_register_port(&client->dev, &typec_cap);
 	if (IS_ERR(hd3ss3220->port))
 		return PTR_ERR(hd3ss3220->port);
 
-- 
2.23.0

[PATCH v3 8/9] usb: typec: Remove the callback members from struct typec_capability

[Heikki Krogerus]

There are no more users for them.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/usb/typec/class.c | 40 +++++++++++----------------------------
 include/linux/usb/typec.h | 17 -----------------
 2 files changed, 11 insertions(+), 46 deletions(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 11ed3dc6fc49..3e9fa2530b86 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -52,7 +52,6 @@ struct typec_port {
 	struct typec_switch		*sw;
 	struct typec_mux		*mux;
 
-	const struct typec_capability	*orig_cap; /* to be removed */
 	const struct typec_capability	*cap;
 	const struct typec_operations   *ops;
 };
@@ -957,7 +956,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->try_role && (!port->ops || !port->ops->try_role)) {
+	if (!port->ops || !port->ops->try_role) {
 		dev_dbg(dev, "Setting preferred role not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -970,10 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
 			return -EINVAL;
 	}
 
-	if (port->ops && port->ops->try_role)
-		ret = port->ops->try_role(port, role);
-	else
-		ret = port->cap->try_role(port->orig_cap, role);
+	ret = port->ops->try_role(port, role);
 	if (ret)
 		return ret;
 
@@ -1004,7 +1000,7 @@ static ssize_t data_role_store(struct device *dev,
 	struct typec_port *port = to_typec_port(dev);
 	int ret;
 
-	if (!port->cap->dr_set && (!port->ops || !port->ops->dr_set)) {
+	if (!port->ops || !port->ops->dr_set) {
 		dev_dbg(dev, "data role swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1019,10 +1015,7 @@ static ssize_t data_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	if (port->ops && port->ops->dr_set)
-		ret = port->ops->dr_set(port, ret);
-	else
-		ret = port->cap->dr_set(port->orig_cap, ret);
+	ret = port->ops->dr_set(port, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1057,7 +1050,7 @@ static ssize_t power_role_store(struct device *dev,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->pr_set && (!port->ops || !port->ops->pr_set)) {
+	if (!port->ops || !port->ops->pr_set) {
 		dev_dbg(dev, "power role swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1079,10 +1072,7 @@ static ssize_t power_role_store(struct device *dev,
 		goto unlock_and_ret;
 	}
 
-	if (port->ops && port->ops->dr_set)
-		ret = port->ops->pr_set(port, ret);
-	else
-		ret = port->cap->pr_set(port->orig_cap, ret);
+	ret = port->ops->pr_set(port, ret);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1113,8 +1103,8 @@ port_type_store(struct device *dev, struct device_attribute *attr,
 	int ret;
 	enum typec_port_type type;
 
-	if (port->cap->type != TYPEC_PORT_DRP || (!port->cap->port_type_set &&
-	    (!port->ops || !port->ops->port_type_set))) {
+	if (port->cap->type != TYPEC_PORT_DRP ||
+	    !port->ops || !port->ops->port_type_set) {
 		dev_dbg(dev, "changing port type not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1131,10 +1121,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
 		goto unlock_and_ret;
 	}
 
-	if (port->ops && port->ops->port_type_set)
-		ret = port->ops->port_type_set(port, type);
-	else
-		ret = port->cap->port_type_set(port->orig_cap, type);
+	ret = port->ops->port_type_set(port, type);
 	if (ret)
 		goto unlock_and_ret;
 
@@ -1190,7 +1177,7 @@ static ssize_t vconn_source_store(struct device *dev,
 		return -EOPNOTSUPP;
 	}
 
-	if (!port->cap->vconn_set && (!port->ops || !port->ops->vconn_set)) {
+	if (!port->ops || !port->ops->vconn_set) {
 		dev_dbg(dev, "VCONN swapping not supported\n");
 		return -EOPNOTSUPP;
 	}
@@ -1199,11 +1186,7 @@ static ssize_t vconn_source_store(struct device *dev,
 	if (ret)
 		return ret;
 
-	if (port->ops && port->ops->vconn_set)
-		ret = port->ops->vconn_set(port, (enum typec_role)source);
-	else
-		ret = port->cap->vconn_set(port->orig_cap,
-					   (enum typec_role)source);
+	ret = port->ops->vconn_set(port, (enum typec_role)source);
 	if (ret)
 		return ret;
 
@@ -1610,7 +1593,6 @@ struct typec_port *typec_register_port(struct device *parent,
 
 	port->id = id;
 	port->ops = cap->ops;
-	port->orig_cap = cap;
 	port->port_type = cap->type;
 	port->prefer_role = cap->prefer_role;
 	port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index c9bef128453b..894798084319 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -198,11 +198,6 @@ struct typec_operations {
  * @fwnode: Optional fwnode of the port
  * @driver_data: Private pointer for driver specific info
  * @ops: Port operations vector
- * @try_role: Set data role preference for DRP port
- * @dr_set: Set Data Role
- * @pr_set: Set Power Role
- * @vconn_set: Set VCONN Role
- * @port_type_set: Set port type
  *
  * Static capabilities of a single USB Type-C port.
  */
@@ -220,18 +215,6 @@ struct typec_capability {
 	void			*driver_data;
 
 	const struct typec_operations	*ops;
-
-	int		(*try_role)(const struct typec_capability *,
-				    int role);
-
-	int		(*dr_set)(const struct typec_capability *,
-				  enum typec_data_role);
-	int		(*pr_set)(const struct typec_capability *,
-				  enum typec_role);
-	int		(*vconn_set)(const struct typec_capability *,
-				     enum typec_role);
-	int		(*port_type_set)(const struct typec_capability *,
-					 enum typec_port_type);
 };
 
 /* Specific to try_role(). Indicates the user want's to clear the preference. */
-- 
2.23.0

[PATCH v3 9/9] usb: typec: Remove unused members from struct typec_capability

[Heikki Krogerus]

The members for the muxes are not used, so dropping them.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 include/linux/usb/typec.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 894798084319..0f52723a11bd 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -209,8 +209,6 @@ struct typec_capability {
 	int			prefer_role;
 	enum typec_accessory	accessory[TYPEC_MAX_ACCESSORY];
 
-	struct typec_switch	*sw;
-	struct typec_mux	*mux;
 	struct fwnode_handle	*fwnode;
 	void			*driver_data;
 
-- 
2.23.0

Re: [PATCH v3 1/9] usb: typec: Copy everything from struct typec_capability during registration

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:42PM +0300, Heikki Krogerus wrote:
> Copying everything from struct typec_capability to struct
> typec_port during port registration. This will make sure
> that under no circumstances the driver can change the values
> in the struct typec_capability that the port uses.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---
>  drivers/usb/typec/class.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 94a3eda62add..0bbf10c8ad58 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -52,6 +52,7 @@ struct typec_port {
>  	struct typec_switch		*sw;
>  	struct typec_mux		*mux;
>  
> +	const struct typec_capability	*orig_cap; /* to be removed */
>  	const struct typec_capability	*cap;
>  };
>  
> @@ -968,7 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
>  			return -EINVAL;
>  	}
>  
> -	ret = port->cap->try_role(port->cap, role);
> +	ret = port->cap->try_role(port->orig_cap, role);
>  	if (ret)
>  		return ret;
>  
> @@ -1014,7 +1015,7 @@ static ssize_t data_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->dr_set(port->cap, ret);
> +	ret = port->cap->dr_set(port->orig_cap, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1071,7 +1072,7 @@ static ssize_t power_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->pr_set(port->cap, ret);
> +	ret = port->cap->pr_set(port->orig_cap, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1119,7 +1120,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->port_type_set(port->cap, type);
> +	ret = port->cap->port_type_set(port->orig_cap, type);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1184,7 +1185,7 @@ static ssize_t vconn_source_store(struct device *dev,
>  	if (ret)
>  		return ret;
>  
> -	ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
> +	ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source);
>  	if (ret)
>  		return ret;
>  
> @@ -1278,6 +1279,7 @@ static void typec_release(struct device *dev)
>  	ida_destroy(&port->mode_ids);
>  	typec_switch_put(port->sw);
>  	typec_mux_put(port->mux);
> +	kfree(port->cap);
>  	kfree(port);
>  }
>  
> @@ -1579,9 +1581,10 @@ struct typec_port *typec_register_port(struct device *parent,
>  	mutex_init(&port->port_type_lock);
>  
>  	port->id = id;
> -	port->cap = cap;
> +	port->orig_cap = cap;
>  	port->port_type = cap->type;
>  	port->prefer_role = cap->prefer_role;
> +	port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);

I just realized ... unfortunately kmemdup() can return NULL.

>  
>  	device_initialize(&port->dev);
>  	port->dev.class = typec_class;
> -- 
> 2.23.0
> 

Re: [PATCH v3 2/9] usb: typec: Introduce typec_get_drvdata()

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:43PM +0300, Heikki Krogerus wrote:
> Leaving the private driver_data pointer of the port device
> to the port drivers.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/usb/typec/class.c | 11 +++++++++++
>  include/linux/usb/typec.h |  4 ++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 0bbf10c8ad58..89ffe370e426 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -1488,6 +1488,16 @@ EXPORT_SYMBOL_GPL(typec_set_mode);
>  
>  /* --------------------------------------- */
>  
> +/**
> + * typec_get_drvdata - Return private driver data pointer
> + * @port: USB Type-C port
> + */
> +void *typec_get_drvdata(struct typec_port *port)
> +{
> +	return dev_get_drvdata(&port->dev);
> +}
> +EXPORT_SYMBOL_GPL(typec_get_drvdata);
> +
>  /**
>   * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
>   * @port: USB Type-C Port that supports the alternate mode
> @@ -1592,6 +1602,7 @@ struct typec_port *typec_register_port(struct device *parent,
>  	port->dev.fwnode = cap->fwnode;
>  	port->dev.type = &typec_port_dev_type;
>  	dev_set_name(&port->dev, "port%d", id);
> +	dev_set_drvdata(&port->dev, cap->driver_data);
>  
>  	port->sw = typec_switch_get(&port->dev);
>  	if (IS_ERR(port->sw)) {
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index 7df4ecabc78a..8b90cd77331c 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -179,6 +179,7 @@ struct typec_partner_desc {
>   * @sw: Cable plug orientation switch
>   * @mux: Multiplexer switch for Alternate/Accessory Modes
>   * @fwnode: Optional fwnode of the port
> + * @driver_data: Private pointer for driver specific info
>   * @try_role: Set data role preference for DRP port
>   * @dr_set: Set Data Role
>   * @pr_set: Set Power Role
> @@ -198,6 +199,7 @@ struct typec_capability {
>  	struct typec_switch	*sw;
>  	struct typec_mux	*mux;
>  	struct fwnode_handle	*fwnode;
> +	void			*driver_data;
>  
>  	int		(*try_role)(const struct typec_capability *,
>  				    int role);
> @@ -241,6 +243,8 @@ int typec_set_orientation(struct typec_port *port,
>  enum typec_orientation typec_get_orientation(struct typec_port *port);
>  int typec_set_mode(struct typec_port *port, int mode);
>  
> +void *typec_get_drvdata(struct typec_port *port);
> +
>  int typec_find_port_power_role(const char *name);
>  int typec_find_power_role(const char *name);
>  int typec_find_port_data_role(const char *name);
> -- 
> 2.23.0
> 

Re: [PATCH v3 3/9] usb: typec: Separate the operations vector

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:44PM +0300, Heikki Krogerus wrote:
> Introducing struct typec_operations which has the same
> callbacks as struct typec_capability. The old callbacks are
> kept for now, but after all users have been converted, they
> will be removed.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/usb/typec/class.c | 39 +++++++++++++++++++++++++++++----------
>  include/linux/usb/typec.h | 20 ++++++++++++++++++++
>  2 files changed, 49 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 89ffe370e426..11ed3dc6fc49 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -54,6 +54,7 @@ struct typec_port {
>  
>  	const struct typec_capability	*orig_cap; /* to be removed */
>  	const struct typec_capability	*cap;
> +	const struct typec_operations   *ops;
>  };
>  
>  #define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
> @@ -956,7 +957,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->try_role) {
> +	if (!port->cap->try_role && (!port->ops || !port->ops->try_role)) {
>  		dev_dbg(dev, "Setting preferred role not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -969,7 +970,10 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
>  			return -EINVAL;
>  	}
>  
> -	ret = port->cap->try_role(port->orig_cap, role);
> +	if (port->ops && port->ops->try_role)
> +		ret = port->ops->try_role(port, role);
> +	else
> +		ret = port->cap->try_role(port->orig_cap, role);
>  	if (ret)
>  		return ret;
>  
> @@ -1000,7 +1004,7 @@ static ssize_t data_role_store(struct device *dev,
>  	struct typec_port *port = to_typec_port(dev);
>  	int ret;
>  
> -	if (!port->cap->dr_set) {
> +	if (!port->cap->dr_set && (!port->ops || !port->ops->dr_set)) {
>  		dev_dbg(dev, "data role swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1015,7 +1019,10 @@ static ssize_t data_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->dr_set(port->orig_cap, ret);
> +	if (port->ops && port->ops->dr_set)
> +		ret = port->ops->dr_set(port, ret);
> +	else
> +		ret = port->cap->dr_set(port->orig_cap, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1050,7 +1057,7 @@ static ssize_t power_role_store(struct device *dev,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->pr_set) {
> +	if (!port->cap->pr_set && (!port->ops || !port->ops->pr_set)) {
>  		dev_dbg(dev, "power role swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1072,7 +1079,10 @@ static ssize_t power_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->pr_set(port->orig_cap, ret);
> +	if (port->ops && port->ops->dr_set)
> +		ret = port->ops->pr_set(port, ret);
> +	else
> +		ret = port->cap->pr_set(port->orig_cap, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1103,7 +1113,8 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  	int ret;
>  	enum typec_port_type type;
>  
> -	if (!port->cap->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
> +	if (port->cap->type != TYPEC_PORT_DRP || (!port->cap->port_type_set &&
> +	    (!port->ops || !port->ops->port_type_set))) {
>  		dev_dbg(dev, "changing port type not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1120,7 +1131,10 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  		goto unlock_and_ret;
>  	}
>  
> -	ret = port->cap->port_type_set(port->orig_cap, type);
> +	if (port->ops && port->ops->port_type_set)
> +		ret = port->ops->port_type_set(port, type);
> +	else
> +		ret = port->cap->port_type_set(port->orig_cap, type);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1176,7 +1190,7 @@ static ssize_t vconn_source_store(struct device *dev,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->vconn_set) {
> +	if (!port->cap->vconn_set && (!port->ops || !port->ops->vconn_set)) {
>  		dev_dbg(dev, "VCONN swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1185,7 +1199,11 @@ static ssize_t vconn_source_store(struct device *dev,
>  	if (ret)
>  		return ret;
>  
> -	ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source);
> +	if (port->ops && port->ops->vconn_set)
> +		ret = port->ops->vconn_set(port, (enum typec_role)source);
> +	else
> +		ret = port->cap->vconn_set(port->orig_cap,
> +					   (enum typec_role)source);
>  	if (ret)
>  		return ret;
>  
> @@ -1591,6 +1609,7 @@ struct typec_port *typec_register_port(struct device *parent,
>  	mutex_init(&port->port_type_lock);
>  
>  	port->id = id;
> +	port->ops = cap->ops;
>  	port->orig_cap = cap;
>  	port->port_type = cap->type;
>  	port->prefer_role = cap->prefer_role;
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index 8b90cd77331c..c9bef128453b 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -168,6 +168,23 @@ struct typec_partner_desc {
>  	struct usb_pd_identity	*identity;
>  };
>  
> +/**
> + * struct typec_operations - USB Type-C Port Operations
> + * @try_role: Set data role preference for DRP port
> + * @dr_set: Set Data Role
> + * @pr_set: Set Power Role
> + * @vconn_set: Source VCONN
> + * @port_type_set: Set port type
> + */
> +struct typec_operations {
> +	int (*try_role)(struct typec_port *port, int role);
> +	int (*dr_set)(struct typec_port *port, enum typec_data_role role);
> +	int (*pr_set)(struct typec_port *port, enum typec_role role);
> +	int (*vconn_set)(struct typec_port *port, enum typec_role role);
> +	int (*port_type_set)(struct typec_port *port,
> +			     enum typec_port_type type);
> +};
> +
>  /*
>   * struct typec_capability - USB Type-C Port Capabilities
>   * @type: Supported power role of the port
> @@ -180,6 +197,7 @@ struct typec_partner_desc {
>   * @mux: Multiplexer switch for Alternate/Accessory Modes
>   * @fwnode: Optional fwnode of the port
>   * @driver_data: Private pointer for driver specific info
> + * @ops: Port operations vector
>   * @try_role: Set data role preference for DRP port
>   * @dr_set: Set Data Role
>   * @pr_set: Set Power Role
> @@ -201,6 +219,8 @@ struct typec_capability {
>  	struct fwnode_handle	*fwnode;
>  	void			*driver_data;
>  
> +	const struct typec_operations	*ops;
> +
>  	int		(*try_role)(const struct typec_capability *,
>  				    int role);
>  
> -- 
> 2.23.0
> 

Re: [PATCH v3 7/9] usb: typec: hd3ss3220: Start using struct typec_operations

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:48PM +0300, Heikki Krogerus wrote:
> Supplying the operation callbacks as part of a struct
> typec_operations instead of as part of struct
> typec_capability during port registration. After this there
> is not need to keep the capabilities stored anywhere in the
> driver.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/usb/typec/hd3ss3220.c | 24 +++++++++++++-----------
>  1 file changed, 13 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
> index 1900910c637e..7c3ee9d28670 100644
> --- a/drivers/usb/typec/hd3ss3220.c
> +++ b/drivers/usb/typec/hd3ss3220.c
> @@ -38,7 +38,6 @@ struct hd3ss3220 {
>  	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)
> @@ -74,11 +73,9 @@ static enum usb_role hd3ss3220_get_attached_state(struct hd3ss3220 *hd3ss3220)
>  	return attached_state;
>  }
>  
> -static int hd3ss3220_dr_set(const struct typec_capability *cap,
> -			    enum typec_data_role role)
> +static int hd3ss3220_dr_set(struct typec_port *port, enum typec_data_role role)
>  {
> -	struct hd3ss3220 *hd3ss3220 = container_of(cap, struct hd3ss3220,
> -						   typec_cap);
> +	struct hd3ss3220 *hd3ss3220 = typec_get_drvdata(port);
>  	enum usb_role role_val;
>  	int pref, ret = 0;
>  
> @@ -99,6 +96,10 @@ static int hd3ss3220_dr_set(const struct typec_capability *cap,
>  	return ret;
>  }
>  
> +static const struct typec_operations hd3ss3220_ops = {
> +	.dr_set = hd3ss3220_dr_set
> +};
> +
>  static void hd3ss3220_set_role(struct hd3ss3220 *hd3ss3220)
>  {
>  	enum usb_role role_state = hd3ss3220_get_attached_state(hd3ss3220);
> @@ -153,6 +154,7 @@ static const struct regmap_config config = {
>  static int hd3ss3220_probe(struct i2c_client *client,
>  		const struct i2c_device_id *id)
>  {
> +	struct typec_capability typec_cap = { };
>  	struct hd3ss3220 *hd3ss3220;
>  	struct fwnode_handle *connector;
>  	int ret;
> @@ -181,13 +183,13 @@ static int hd3ss3220_probe(struct i2c_client *client,
>  	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;
> +	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
> +	typec_cap.driver_data = hd3ss3220;
> +	typec_cap.type = TYPEC_PORT_DRP;
> +	typec_cap.data = TYPEC_PORT_DRD;
> +	typec_cap.ops = &hd3ss3220_ops;
>  
> -	hd3ss3220->port = typec_register_port(&client->dev,
> -					      &hd3ss3220->typec_cap);
> +	hd3ss3220->port = typec_register_port(&client->dev, &typec_cap);
>  	if (IS_ERR(hd3ss3220->port))
>  		return PTR_ERR(hd3ss3220->port);
>  
> -- 
> 2.23.0
> 

Re: [PATCH v3 8/9] usb: typec: Remove the callback members from struct typec_capability

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:49PM +0300, Heikki Krogerus wrote:
> There are no more users for them.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/usb/typec/class.c | 40 +++++++++++----------------------------
>  include/linux/usb/typec.h | 17 -----------------
>  2 files changed, 11 insertions(+), 46 deletions(-)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 11ed3dc6fc49..3e9fa2530b86 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -52,7 +52,6 @@ struct typec_port {
>  	struct typec_switch		*sw;
>  	struct typec_mux		*mux;
>  
> -	const struct typec_capability	*orig_cap; /* to be removed */
>  	const struct typec_capability	*cap;
>  	const struct typec_operations   *ops;
>  };
> @@ -957,7 +956,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->try_role && (!port->ops || !port->ops->try_role)) {
> +	if (!port->ops || !port->ops->try_role) {
>  		dev_dbg(dev, "Setting preferred role not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -970,10 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr,
>  			return -EINVAL;
>  	}
>  
> -	if (port->ops && port->ops->try_role)
> -		ret = port->ops->try_role(port, role);
> -	else
> -		ret = port->cap->try_role(port->orig_cap, role);
> +	ret = port->ops->try_role(port, role);
>  	if (ret)
>  		return ret;
>  
> @@ -1004,7 +1000,7 @@ static ssize_t data_role_store(struct device *dev,
>  	struct typec_port *port = to_typec_port(dev);
>  	int ret;
>  
> -	if (!port->cap->dr_set && (!port->ops || !port->ops->dr_set)) {
> +	if (!port->ops || !port->ops->dr_set) {
>  		dev_dbg(dev, "data role swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1019,10 +1015,7 @@ static ssize_t data_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	if (port->ops && port->ops->dr_set)
> -		ret = port->ops->dr_set(port, ret);
> -	else
> -		ret = port->cap->dr_set(port->orig_cap, ret);
> +	ret = port->ops->dr_set(port, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1057,7 +1050,7 @@ static ssize_t power_role_store(struct device *dev,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->pr_set && (!port->ops || !port->ops->pr_set)) {
> +	if (!port->ops || !port->ops->pr_set) {
>  		dev_dbg(dev, "power role swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1079,10 +1072,7 @@ static ssize_t power_role_store(struct device *dev,
>  		goto unlock_and_ret;
>  	}
>  
> -	if (port->ops && port->ops->dr_set)
> -		ret = port->ops->pr_set(port, ret);
> -	else
> -		ret = port->cap->pr_set(port->orig_cap, ret);
> +	ret = port->ops->pr_set(port, ret);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1113,8 +1103,8 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  	int ret;
>  	enum typec_port_type type;
>  
> -	if (port->cap->type != TYPEC_PORT_DRP || (!port->cap->port_type_set &&
> -	    (!port->ops || !port->ops->port_type_set))) {
> +	if (port->cap->type != TYPEC_PORT_DRP ||
> +	    !port->ops || !port->ops->port_type_set) {
>  		dev_dbg(dev, "changing port type not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1131,10 +1121,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  		goto unlock_and_ret;
>  	}
>  
> -	if (port->ops && port->ops->port_type_set)
> -		ret = port->ops->port_type_set(port, type);
> -	else
> -		ret = port->cap->port_type_set(port->orig_cap, type);
> +	ret = port->ops->port_type_set(port, type);
>  	if (ret)
>  		goto unlock_and_ret;
>  
> @@ -1190,7 +1177,7 @@ static ssize_t vconn_source_store(struct device *dev,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	if (!port->cap->vconn_set && (!port->ops || !port->ops->vconn_set)) {
> +	if (!port->ops || !port->ops->vconn_set) {
>  		dev_dbg(dev, "VCONN swapping not supported\n");
>  		return -EOPNOTSUPP;
>  	}
> @@ -1199,11 +1186,7 @@ static ssize_t vconn_source_store(struct device *dev,
>  	if (ret)
>  		return ret;
>  
> -	if (port->ops && port->ops->vconn_set)
> -		ret = port->ops->vconn_set(port, (enum typec_role)source);
> -	else
> -		ret = port->cap->vconn_set(port->orig_cap,
> -					   (enum typec_role)source);
> +	ret = port->ops->vconn_set(port, (enum typec_role)source);
>  	if (ret)
>  		return ret;
>  
> @@ -1610,7 +1593,6 @@ struct typec_port *typec_register_port(struct device *parent,
>  
>  	port->id = id;
>  	port->ops = cap->ops;
> -	port->orig_cap = cap;
>  	port->port_type = cap->type;
>  	port->prefer_role = cap->prefer_role;
>  	port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index c9bef128453b..894798084319 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -198,11 +198,6 @@ struct typec_operations {
>   * @fwnode: Optional fwnode of the port
>   * @driver_data: Private pointer for driver specific info
>   * @ops: Port operations vector
> - * @try_role: Set data role preference for DRP port
> - * @dr_set: Set Data Role
> - * @pr_set: Set Power Role
> - * @vconn_set: Set VCONN Role
> - * @port_type_set: Set port type
>   *
>   * Static capabilities of a single USB Type-C port.
>   */
> @@ -220,18 +215,6 @@ struct typec_capability {
>  	void			*driver_data;
>  
>  	const struct typec_operations	*ops;
> -
> -	int		(*try_role)(const struct typec_capability *,
> -				    int role);
> -
> -	int		(*dr_set)(const struct typec_capability *,
> -				  enum typec_data_role);
> -	int		(*pr_set)(const struct typec_capability *,
> -				  enum typec_role);
> -	int		(*vconn_set)(const struct typec_capability *,
> -				     enum typec_role);
> -	int		(*port_type_set)(const struct typec_capability *,
> -					 enum typec_port_type);
>  };
>  
>  /* Specific to try_role(). Indicates the user want's to clear the preference. */
> -- 
> 2.23.0
> 

Re: [PATCH v3 9/9] usb: typec: Remove unused members from struct typec_capability

[Guenter Roeck]

On Tue, Oct 08, 2019 at 02:13:50PM +0300, Heikki Krogerus wrote:
> The members for the muxes are not used, so dropping them.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  include/linux/usb/typec.h | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index 894798084319..0f52723a11bd 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -209,8 +209,6 @@ struct typec_capability {
>  	int			prefer_role;
>  	enum typec_accessory	accessory[TYPEC_MAX_ACCESSORY];
>  
> -	struct typec_switch	*sw;
> -	struct typec_mux	*mux;
>  	struct fwnode_handle	*fwnode;
>  	void			*driver_data;
>  
> -- 
> 2.23.0
> 

Re: [PATCH v3 1/9] usb: typec: Copy everything from struct typec_capability during registration

[Heikki Krogerus]

On Tue, Oct 08, 2019 at 01:44:28PM -0700, Guenter Roeck wrote:
> > @@ -1579,9 +1581,10 @@ struct typec_port *typec_register_port(struct device *parent,
> >  	mutex_init(&port->port_type_lock);
> >  
> >  	port->id = id;
> > -	port->cap = cap;
> > +	port->orig_cap = cap;
> >  	port->port_type = cap->type;
> >  	port->prefer_role = cap->prefer_role;
> > +	port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
> 
> I just realized ... unfortunately kmemdup() can return NULL.

Of course. I'll fix that.

thanks,

-- 
heikki