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@xxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> 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
>
