The port drivers will describe every Type-C port they control with struct
typec_capability data structure, and register them with the following API:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_register_port typec_unregister_port
When registering the ports, the prefer_role member in struct typec_capability
registration. The class offers the following API for registering/unregistering
partners.
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_register_partner typec_unregister_partner
The class will provide a handle to struct typec_partner if the registration was
create a sysfs directory for the identity under the partner device. The result
of Discover Identity command can then be reported with the following API:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_partner_set_identity
Registering Cables
the details during registration. The class offers the following API for
registering/unregistering cables and their plugs:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_register_cable typec_unregister_cable typec_register_plug typec_unregister_plug
The class will provide a handle to struct typec_cable and struct typec_plug if
sysfs directory for the identity under the cable device. The result of Discover
Identity command can then be reported with the following API:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_cable_set_identity
Notifications
during connection of a partner or cable, the port driver must use the following
APIs to report it to the class:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_set_data_role typec_set_pwr_role typec_set_vconn_role typec_set_pwr_opmode
Alternate Modes
Ports that support Alternate Modes need to register each SVID they support with
the following API:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_port_register_altmode
If a partner or cable plug provides a list of SVIDs as response to USB Power
API for the partners:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_partner_register_altmode
API for the Cable Plugs:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_plug_register_altmode
So ports, partners and cable plugs will register the alternate modes with their
typec_altmode on success, or NULL. The unregistration will happen with the same
function:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_unregister_altmode
If a partner or cable plug enters or exits a mode, the port driver needs to
notify the class with the following API:
-.. kernel-doc:: drivers/usb/typec/typec.c
+.. kernel-doc:: drivers/usb/typec/class.c
:functions: typec_altmode_update_active
+
+Multiplexer/DeMultiplexer Switches
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+USB Type-C connectors may have one or more mux/demux switches behind them. Since
+the plugs can be inserted right-side-up or upside-down, a switch is needed to
+route the correct data pairs from the connector to the USB controllers. If
+Alternate or Accessory Modes are supported, another switch is needed that can
+route the pins on the connector to some other component besides USB. USB Type-C
+Connector Class supplies an API for registering those switches.
+
+.. kernel-doc:: drivers/usb/typec/mux.c
+ :functions: typec_switch_register typec_switch_unregister typec_mux_register typec_mux_unregister
+
+In most cases the same physical mux will handle both the orientation and mode.
+However, as the port drivers will be responsible for the orientation, and the
+alternate mode drivers for the mode, the two are always separated into their
+own logical components: "mux" for the mode and "switch" for the orientation.
+
+When a port is registered, USB Type-C Connector Class requests both the mux and
+the switch for the port. The drivers can then use the following API for
+controlling them:
+
+.. kernel-doc:: drivers/usb/typec/class.c
+ :functions: typec_set_orientation typec_set_mode
+
+If the connector is dual-role capable, there may also be a switch for the data
+role. USB Type-C Connector Class does not supply separate API for them. The
+port drivers can use USB Role Class API with those.
+
+Illustration of the muxes behind a connector that supports an alternate mode:
+
+ ------------------------
+ | Connector |
+ ------------------------
+ | |
+ ------------------------
+ \ Orientation /
+ --------------------
+ |
+ --------------------
+ / Mode \
+ ------------------------
+ / \
+ ------------------------ --------------------
+ | Alt Mode | / USB Role \
+ ------------------------ ------------------------
+ / \
+ ------------------------ ------------------------
+ | USB Host | | USB Device |
+ ------------------------ ------------------------
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_TYPEC) += typec.o
+typec-y := class.o mux.o
obj-$(CONFIG_TYPEC_TCPM) += tcpm.o
obj-y += fusb302/
obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB Type-C Connector Class
+ *
+ * Copyright (C) 2017, Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/usb/typec.h>
+#include <linux/usb/typec_mux.h>
+
+struct typec_mode {
+ int index;
+ u32 vdo;
+ char *desc;
+ enum typec_port_type roles;
+
+ struct typec_altmode *alt_mode;
+
+ unsigned int active:1;
+
+ char group_name[6];
+ struct attribute_group group;
+ struct attribute *attrs[5];
+ struct device_attribute vdo_attr;
+ struct device_attribute desc_attr;
+ struct device_attribute active_attr;
+ struct device_attribute roles_attr;
+};
+
+struct typec_altmode {
+ struct device dev;
+ u16 svid;
+ int n_modes;
+ struct typec_mode modes[ALTMODE_MAX_MODES];
+ const struct attribute_group *mode_groups[ALTMODE_MAX_MODES];
+};
+
+struct typec_plug {
+ struct device dev;
+ enum typec_plug_index index;
+};
+
+struct typec_cable {
+ struct device dev;
+ enum typec_plug_type type;
+ struct usb_pd_identity *identity;
+ unsigned int active:1;
+};
+
+struct typec_partner {
+ struct device dev;
+ unsigned int usb_pd:1;
+ struct usb_pd_identity *identity;
+ enum typec_accessory accessory;
+};
+
+struct typec_port {
+ unsigned int id;
+ struct device dev;
+
+ int prefer_role;
+ enum typec_data_role data_role;
+ enum typec_role pwr_role;
+ enum typec_role vconn_role;
+ enum typec_pwr_opmode pwr_opmode;
+ enum typec_port_type port_type;
+ struct mutex port_type_lock;
+
+ enum typec_orientation orientation;
+ struct typec_switch *sw;
+ struct typec_mux *mux;
+
+ const struct typec_capability *cap;
+};
+
+#define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
+#define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev)
+#define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev)
+#define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev)
+#define to_altmode(_dev_) container_of(_dev_, struct typec_altmode, dev)
+
+static const struct device_type typec_partner_dev_type;
+static const struct device_type typec_cable_dev_type;
+static const struct device_type typec_plug_dev_type;
+static const struct device_type typec_port_dev_type;
+
+#define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type)
+#define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type)
+#define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type)
+#define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
+
+static DEFINE_IDA(typec_index_ida);
+static struct class *typec_class;
+
+/* ------------------------------------------------------------------------- */
+/* Common attributes */
+
+static const char * const typec_accessory_modes[] = {
+ [TYPEC_ACCESSORY_NONE] = "none",
+ [TYPEC_ACCESSORY_AUDIO] = "analog_audio",
+ [TYPEC_ACCESSORY_DEBUG] = "debug",
+};
+
+static struct usb_pd_identity *get_pd_identity(struct device *dev)
+{
+ if (is_typec_partner(dev)) {
+ struct typec_partner *partner = to_typec_partner(dev);
+
+ return partner->identity;
+ } else if (is_typec_cable(dev)) {
+ struct typec_cable *cable = to_typec_cable(dev);
+
+ return cable->identity;
+ }
+ return NULL;
+}
+
+static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->id_header);
+}
+static DEVICE_ATTR_RO(id_header);
+
+static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->cert_stat);
+}
+static DEVICE_ATTR_RO(cert_stat);
+
+static ssize_t product_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->product);
+}
+static DEVICE_ATTR_RO(product);
+
+static struct attribute *usb_pd_id_attrs[] = {
+ &dev_attr_id_header.attr,
+ &dev_attr_cert_stat.attr,
+ &dev_attr_product.attr,
+ NULL
+};
+
+static const struct attribute_group usb_pd_id_group = {
+ .name = "identity",
+ .attrs = usb_pd_id_attrs,
+};
+
+static const struct attribute_group *usb_pd_id_groups[] = {
+ &usb_pd_id_group,
+ NULL,
+};
+
+static void typec_report_identity(struct device *dev)
+{
+ sysfs_notify(&dev->kobj, "identity", "id_header");
+ sysfs_notify(&dev->kobj, "identity", "cert_stat");
+ sysfs_notify(&dev->kobj, "identity", "product");
+}
+
+/* ------------------------------------------------------------------------- */
+/* Alternate Modes */
+
+/**
+ * typec_altmode_update_active - Report Enter/Exit mode
+ * @alt: Handle to the alternate mode
+ * @mode: Mode index
+ * @active: True when the mode has been entered
+ *
+ * If a partner or cable plug executes Enter/Exit Mode command successfully, the
+ * drivers use this routine to report the updated state of the mode.
+ */
+void typec_altmode_update_active(struct typec_altmode *alt, int mode,
+ bool active)
+{
+ struct typec_mode *m = &alt->modes[mode];
+ char dir[6];
+
+ if (m->active == active)
+ return;
+
+ m->active = active;
+ snprintf(dir, sizeof(dir), "mode%d", mode);
+ sysfs_notify(&alt->dev.kobj, dir, "active");
+ kobject_uevent(&alt->dev.kobj, KOBJ_CHANGE);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_update_active);
+
+/**
+ * typec_altmode2port - Alternate Mode to USB Type-C port
+ * @alt: The Alternate Mode
+ *
+ * Returns handle to the port that a cable plug or partner with @alt is
+ * connected to.
+ */
+struct typec_port *typec_altmode2port(struct typec_altmode *alt)
+{
+ if (is_typec_plug(alt->dev.parent))
+ return to_typec_port(alt->dev.parent->parent->parent);
+ if (is_typec_partner(alt->dev.parent))
+ return to_typec_port(alt->dev.parent->parent);
+ if (is_typec_port(alt->dev.parent))
+ return to_typec_port(alt->dev.parent);
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(typec_altmode2port);
+
+static ssize_t
+typec_altmode_vdo_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_mode *mode = container_of(attr, struct typec_mode,
+ vdo_attr);
+
+ return sprintf(buf, "0x%08x\n", mode->vdo);
+}
+
+static ssize_t
+typec_altmode_desc_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_mode *mode = container_of(attr, struct typec_mode,
+ desc_attr);
+
+ return sprintf(buf, "%s\n", mode->desc ? mode->desc : "");
+}
+
+static ssize_t
+typec_altmode_active_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_mode *mode = container_of(attr, struct typec_mode,
+ active_attr);
+
+ return sprintf(buf, "%s\n", mode->active ? "yes" : "no");
+}
+
+static ssize_t
+typec_altmode_active_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_mode *mode = container_of(attr, struct typec_mode,
+ active_attr);
+ struct typec_port *port = typec_altmode2port(mode->alt_mode);
+ bool activate;
+ int ret;
+
+ if (!port->cap->activate_mode)
+ return -EOPNOTSUPP;
+
+ ret = kstrtobool(buf, &activate);
+ if (ret)
+ return ret;
+
+ ret = port->cap->activate_mode(port->cap, mode->index, activate);
+ if (ret)
+ return ret;
+
+ return size;
+}
+
+static ssize_t
+typec_altmode_roles_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_mode *mode = container_of(attr, struct typec_mode,
+ roles_attr);
+ ssize_t ret;
+
+ switch (mode->roles) {
+ case TYPEC_PORT_DFP:
+ ret = sprintf(buf, "source\n");
+ break;
+ case TYPEC_PORT_UFP:
+ ret = sprintf(buf, "sink\n");
+ break;
+ case TYPEC_PORT_DRP:
+ default:
+ ret = sprintf(buf, "source sink\n");
+ break;
+ }
+ return ret;
+}
+
+static void typec_init_modes(struct typec_altmode *alt,
+ const struct typec_mode_desc *desc, bool is_port)
+{
+ int i;
+
+ for (i = 0; i < alt->n_modes; i++, desc++) {
+ struct typec_mode *mode = &alt->modes[i];
+
+ /* Not considering the human readable description critical */
+ mode->desc = kstrdup(desc->desc, GFP_KERNEL);
+ if (desc->desc && !mode->desc)
+ dev_err(&alt->dev, "failed to copy mode%d desc\n", i);
+
+ mode->alt_mode = alt;
+ mode->vdo = desc->vdo;
+ mode->roles = desc->roles;
+ mode->index = desc->index;
+ sprintf(mode->group_name, "mode%d", desc->index);
+
+ sysfs_attr_init(&mode->vdo_attr.attr);
+ mode->vdo_attr.attr.name = "vdo";
+ mode->vdo_attr.attr.mode = 0444;
+ mode->vdo_attr.show = typec_altmode_vdo_show;
+
+ sysfs_attr_init(&mode->desc_attr.attr);
+ mode->desc_attr.attr.name = "description";
+ mode->desc_attr.attr.mode = 0444;
+ mode->desc_attr.show = typec_altmode_desc_show;
+
+ sysfs_attr_init(&mode->active_attr.attr);
+ mode->active_attr.attr.name = "active";
+ mode->active_attr.attr.mode = 0644;
+ mode->active_attr.show = typec_altmode_active_show;
+ mode->active_attr.store = typec_altmode_active_store;
+
+ mode->attrs[0] = &mode->vdo_attr.attr;
+ mode->attrs[1] = &mode->desc_attr.attr;
+ mode->attrs[2] = &mode->active_attr.attr;
+
+ /* With ports, list the roles that the mode is supported with */
+ if (is_port) {
+ sysfs_attr_init(&mode->roles_attr.attr);
+ mode->roles_attr.attr.name = "supported_roles";
+ mode->roles_attr.attr.mode = 0444;
+ mode->roles_attr.show = typec_altmode_roles_show;
+
+ mode->attrs[3] = &mode->roles_attr.attr;
+ }
+
+ mode->group.attrs = mode->attrs;
+ mode->group.name = mode->group_name;
+
+ alt->mode_groups[i] = &mode->group;
+ }
+}
+
+static ssize_t svid_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_altmode *alt = to_altmode(dev);
+
+ return sprintf(buf, "%04x\n", alt->svid);
+}
+static DEVICE_ATTR_RO(svid);
+
+static struct attribute *typec_altmode_attrs[] = {
+ &dev_attr_svid.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(typec_altmode);
+
+static void typec_altmode_release(struct device *dev)
+{
+ struct typec_altmode *alt = to_altmode(dev);
+ int i;
+
+ for (i = 0; i < alt->n_modes; i++)
+ kfree(alt->modes[i].desc);
+ kfree(alt);
+}
+
+static const struct device_type typec_altmode_dev_type = {
+ .name = "typec_alternate_mode",
+ .groups = typec_altmode_groups,
+ .release = typec_altmode_release,
+};
+
+static struct typec_altmode *
+typec_register_altmode(struct device *parent,
+ const struct typec_altmode_desc *desc)
+{
+ struct typec_altmode *alt;
+ int ret;
+
+ alt = kzalloc(sizeof(*alt), GFP_KERNEL);
+ if (!alt)
+ return ERR_PTR(-ENOMEM);
+
+ alt->svid = desc->svid;
+ alt->n_modes = desc->n_modes;
+ typec_init_modes(alt, desc->modes, is_typec_port(parent));
+
+ alt->dev.parent = parent;
+ alt->dev.groups = alt->mode_groups;
+ alt->dev.type = &typec_altmode_dev_type;
+ dev_set_name(&alt->dev, "svid-%04x", alt->svid);
+
+ ret = device_register(&alt->dev);
+ if (ret) {
+ dev_err(parent, "failed to register alternate mode (%d)\n",
+ ret);
+ put_device(&alt->dev);
+ return ERR_PTR(ret);
+ }
+
+ return alt;
+}
+
+/**
+ * typec_unregister_altmode - Unregister Alternate Mode
+ * @alt: The alternate mode to be unregistered
+ *
+ * Unregister device created with typec_partner_register_altmode(),
+ * typec_plug_register_altmode() or typec_port_register_altmode().
+ */
+void typec_unregister_altmode(struct typec_altmode *alt)
+{
+ if (!IS_ERR_OR_NULL(alt))
+ device_unregister(&alt->dev);
+}
+EXPORT_SYMBOL_GPL(typec_unregister_altmode);
+
+/* ------------------------------------------------------------------------- */
+/* Type-C Partners */
+
+static ssize_t accessory_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_partner *p = to_typec_partner(dev);
+
+ return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
+}
+static DEVICE_ATTR_RO(accessory_mode);
+
+static ssize_t supports_usb_power_delivery_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_partner *p = to_typec_partner(dev);
+
+ return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no");
+}
+static DEVICE_ATTR_RO(supports_usb_power_delivery);
+
+static struct attribute *typec_partner_attrs[] = {
+ &dev_attr_accessory_mode.attr,
+ &dev_attr_supports_usb_power_delivery.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(typec_partner);
+
+static void typec_partner_release(struct device *dev)
+{
+ struct typec_partner *partner = to_typec_partner(dev);
+
+ kfree(partner);
+}
+
+static const struct device_type typec_partner_dev_type = {
+ .name = "typec_partner",
+ .groups = typec_partner_groups,
+ .release = typec_partner_release,
+};
+
+/**
+ * typec_partner_set_identity - Report result from Discover Identity command
+ * @partner: The partner updated identity values
+ *
+ * This routine is used to report that the result of Discover Identity USB power
+ * delivery command has become available.
+ */
+int typec_partner_set_identity(struct typec_partner *partner)
+{
+ if (!partner->identity)
+ return -EINVAL;
+
+ typec_report_identity(&partner->dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_partner_set_identity);
+
+/**
+ * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode
+ * @partner: USB Type-C Partner that supports the alternate mode
+ * @desc: Description of the alternate mode
+ *
+ * This routine is used to register each alternate mode individually that
+ * @partner has listed in response to Discover SVIDs command. The modes for a
+ * SVID listed in response to Discover Modes command need to be listed in an
+ * array in @desc.
+ *
+ * Returns handle to the alternate mode on success or NULL on failure.
+ */
+struct typec_altmode *
+typec_partner_register_altmode(struct typec_partner *partner,
+ const struct typec_altmode_desc *desc)
+{
+ return typec_register_altmode(&partner->dev, desc);
+}
+EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
+
+/**
+ * typec_register_partner - Register a USB Type-C Partner
+ * @port: The USB Type-C Port the partner is connected to
+ * @desc: Description of the partner
+ *
+ * Registers a device for USB Type-C Partner described in @desc.
+ *
+ * Returns handle to the partner on success or ERR_PTR on failure.
+ */
+struct typec_partner *typec_register_partner(struct typec_port *port,
+ struct typec_partner_desc *desc)
+{
+ struct typec_partner *partner;
+ int ret;
+
+ partner = kzalloc(sizeof(*partner), GFP_KERNEL);
+ if (!partner)
+ return ERR_PTR(-ENOMEM);
+
+ partner->usb_pd = desc->usb_pd;
+ partner->accessory = desc->accessory;
+
+ if (desc->identity) {
+ /*
+ * Creating directory for the identity only if the driver is
+ * able to provide data to it.
+ */
+ partner->dev.groups = usb_pd_id_groups;
+ partner->identity = desc->identity;
+ }
+
+ partner->dev.class = typec_class;
+ partner->dev.parent = &port->dev;
+ partner->dev.type = &typec_partner_dev_type;
+ dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev));
+
+ ret = device_register(&partner->dev);
+ if (ret) {
+ dev_err(&port->dev, "failed to register partner (%d)\n", ret);
+ put_device(&partner->dev);
+ return ERR_PTR(ret);
+ }
+
+ return partner;
+}
+EXPORT_SYMBOL_GPL(typec_register_partner);
+
+/**
+ * typec_unregister_partner - Unregister a USB Type-C Partner
+ * @partner: The partner to be unregistered
+ *
+ * Unregister device created with typec_register_partner().
+ */
+void typec_unregister_partner(struct typec_partner *partner)
+{
+ if (!IS_ERR_OR_NULL(partner))
+ device_unregister(&partner->dev);
+}
+EXPORT_SYMBOL_GPL(typec_unregister_partner);
+
+/* ------------------------------------------------------------------------- */
+/* Type-C Cable Plugs */
+
+static void typec_plug_release(struct device *dev)
+{
+ struct typec_plug *plug = to_typec_plug(dev);
+
+ kfree(plug);
+}
+
+static const struct device_type typec_plug_dev_type = {
+ .name = "typec_plug",
+ .release = typec_plug_release,
+};
+
+/**
+ * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode
+ * @plug: USB Type-C Cable Plug that supports the alternate mode
+ * @desc: Description of the alternate mode
+ *
+ * This routine is used to register each alternate mode individually that @plug
+ * has listed in response to Discover SVIDs command. The modes for a SVID that
+ * the plug lists in response to Discover Modes command need to be listed in an
+ * array in @desc.
+ *
+ * Returns handle to the alternate mode on success or ERR_PTR on failure.
+ */
+struct typec_altmode *
+typec_plug_register_altmode(struct typec_plug *plug,
+ const struct typec_altmode_desc *desc)
+{
+ return typec_register_altmode(&plug->dev, desc);
+}
+EXPORT_SYMBOL_GPL(typec_plug_register_altmode);
+
+/**
+ * typec_register_plug - Register a USB Type-C Cable Plug
+ * @cable: USB Type-C Cable with the plug
+ * @desc: Description of the cable plug
+ *
+ * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C
+ * Cable Plug represents a plug with electronics in it that can response to USB
+ * Power Delivery SOP Prime or SOP Double Prime packages.
+ *
+ * Returns handle to the cable plug on success or ERR_PTR on failure.
+ */
+struct typec_plug *typec_register_plug(struct typec_cable *cable,
+ struct typec_plug_desc *desc)
+{
+ struct typec_plug *plug;
+ char name[8];
+ int ret;
+
+ plug = kzalloc(sizeof(*plug), GFP_KERNEL);
+ if (!plug)
+ return ERR_PTR(-ENOMEM);
+
+ sprintf(name, "plug%d", desc->index);
+
+ plug->index = desc->index;
+ plug->dev.class = typec_class;
+ plug->dev.parent = &cable->dev;
+ plug->dev.type = &typec_plug_dev_type;
+ dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name);
+
+ ret = device_register(&plug->dev);
+ if (ret) {
+ dev_err(&cable->dev, "failed to register plug (%d)\n", ret);
+ put_device(&plug->dev);
+ return ERR_PTR(ret);
+ }
+
+ return plug;
+}
+EXPORT_SYMBOL_GPL(typec_register_plug);
+
+/**
+ * typec_unregister_plug - Unregister a USB Type-C Cable Plug
+ * @plug: The cable plug to be unregistered
+ *
+ * Unregister device created with typec_register_plug().
+ */
+void typec_unregister_plug(struct typec_plug *plug)
+{
+ if (!IS_ERR_OR_NULL(plug))
+ device_unregister(&plug->dev);
+}
+EXPORT_SYMBOL_GPL(typec_unregister_plug);
+
+/* Type-C Cables */
+
+static ssize_t
+type_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_cable *cable = to_typec_cable(dev);
+
+ return sprintf(buf, "%s\n", cable->active ? "active" : "passive");
+}
+static DEVICE_ATTR_RO(type);
+
+static const char * const typec_plug_types[] = {
+ [USB_PLUG_NONE] = "unknown",
+ [USB_PLUG_TYPE_A] = "type-a",
+ [USB_PLUG_TYPE_B] = "type-b",
+ [USB_PLUG_TYPE_C] = "type-c",
+ [USB_PLUG_CAPTIVE] = "captive",
+};
+
+static ssize_t plug_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct typec_cable *cable = to_typec_cable(dev);
+
+ return sprintf(buf, "%s\n", typec_plug_types[cable->type]);
+}
+static DEVICE_ATTR_RO(plug_type);
+
+static struct attribute *typec_cable_attrs[] = {
+ &dev_attr_type.attr,
+ &dev_attr_plug_type.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(typec_cable);
+
+static void typec_cable_release(struct device *dev)
+{
+ struct typec_cable *cable = to_typec_cable(dev);
+
+ kfree(cable);
+}
+
+static const struct device_type typec_cable_dev_type = {
+ .name = "typec_cable",
+ .groups = typec_cable_groups,
+ .release = typec_cable_release,
+};
+
+/**
+ * typec_cable_set_identity - Report result from Discover Identity command
+ * @cable: The cable updated identity values
+ *
+ * This routine is used to report that the result of Discover Identity USB power
+ * delivery command has become available.
+ */
+int typec_cable_set_identity(struct typec_cable *cable)
+{
+ if (!cable->identity)
+ return -EINVAL;
+
+ typec_report_identity(&cable->dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_cable_set_identity);
+
+/**
+ * typec_register_cable - Register a USB Type-C Cable
+ * @port: The USB Type-C Port the cable is connected to
+ * @desc: Description of the cable
+ *
+ * Registers a device for USB Type-C Cable described in @desc. The cable will be
+ * parent for the optional cable plug devises.
+ *
+ * Returns handle to the cable on success or ERR_PTR on failure.
+ */
+struct typec_cable *typec_register_cable(struct typec_port *port,
+ struct typec_cable_desc *desc)
+{
+ struct typec_cable *cable;
+ int ret;
+
+ cable = kzalloc(sizeof(*cable), GFP_KERNEL);
+ if (!cable)
+ return ERR_PTR(-ENOMEM);
+
+ cable->type = desc->type;
+ cable->active = desc->active;
+
+ if (desc->identity) {
+ /*
+ * Creating directory for the identity only if the driver is
+ * able to provide data to it.
+ */
+ cable->dev.groups = usb_pd_id_groups;
+ cable->identity = desc->identity;
+ }
+
+ cable->dev.class = typec_class;
+ cable->dev.parent = &port->dev;
+ cable->dev.type = &typec_cable_dev_type;
+ dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev));
+
+ ret = device_register(&cable->dev);
+ if (ret) {
+ dev_err(&port->dev, "failed to register cable (%d)\n", ret);
+ put_device(&cable->dev);
+ return ERR_PTR(ret);
+ }
+
+ return cable;
+}
+EXPORT_SYMBOL_GPL(typec_register_cable);
+
+/**
+ * typec_unregister_cable - Unregister a USB Type-C Cable
+ * @cable: The cable to be unregistered
+ *
+ * Unregister device created with typec_register_cable().
+ */
+void typec_unregister_cable(struct typec_cable *cable)
+{
+ if (!IS_ERR_OR_NULL(cable))
+ device_unregister(&cable->dev);
+}
+EXPORT_SYMBOL_GPL(typec_unregister_cable);
+
+/* ------------------------------------------------------------------------- */
+/* USB Type-C ports */
+
+static const char * const typec_roles[] = {
+ [TYPEC_SINK] = "sink",
+ [TYPEC_SOURCE] = "source",
+};
+
+static const char * const typec_data_roles[] = {
+ [TYPEC_DEVICE] = "device",
+ [TYPEC_HOST] = "host",
+};
+
+static const char * const typec_port_types[] = {
+ [TYPEC_PORT_DFP] = "source",
+ [TYPEC_PORT_UFP] = "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_DRP] = "[dual] source sink",
+};
+
+static ssize_t
+preferred_role_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_port *port = to_typec_port(dev);
+ int role;
+ int ret;
+
+ if (port->cap->type != TYPEC_PORT_DRP) {
+ dev_dbg(dev, "Preferred role only supported with DRP ports\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (!port->cap->try_role) {
+ dev_dbg(dev, "Setting preferred role not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ role = sysfs_match_string(typec_roles, buf);
+ if (role < 0) {
+ if (sysfs_streq(buf, "none"))
+ role = TYPEC_NO_PREFERRED_ROLE;
+ else
+ return -EINVAL;
+ }
+
+ ret = port->cap->try_role(port->cap, role);
+ if (ret)
+ return ret;
+
+ port->prefer_role = role;
+ return size;
+}
+
+static ssize_t
+preferred_role_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ if (port->cap->type != TYPEC_PORT_DRP)
+ return 0;
+
+ if (port->prefer_role < 0)
+ return 0;
+
+ return sprintf(buf, "%s\n", typec_roles[port->prefer_role]);
+}
+static DEVICE_ATTR_RW(preferred_role);
+
+static ssize_t data_role_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_port *port = to_typec_port(dev);
+ int ret;
+
+ if (!port->cap->dr_set) {
+ dev_dbg(dev, "data role swapping not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ ret = sysfs_match_string(typec_data_roles, buf);
+ if (ret < 0)
+ 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]);
+ ret = -EOPNOTSUPP;
+ goto unlock_and_ret;
+ }
+
+ ret = port->cap->dr_set(port->cap, ret);
+ if (ret)
+ goto unlock_and_ret;
+
+ ret = size;
+unlock_and_ret:
+ mutex_unlock(&port->port_type_lock);
+ return ret;
+}
+
+static ssize_t data_role_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ if (port->cap->type == TYPEC_PORT_DRP)
+ return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
+ "[host] device" : "host [device]");
+
+ return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]);
+}
+static DEVICE_ATTR_RW(data_role);
+
+static ssize_t power_role_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_port *port = to_typec_port(dev);
+ int ret;
+
+ if (!port->cap->pd_revision) {
+ dev_dbg(dev, "USB Power Delivery not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (!port->cap->pr_set) {
+ dev_dbg(dev, "power role swapping not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (port->pwr_opmode != TYPEC_PWR_MODE_PD) {
+ dev_dbg(dev, "partner unable to swap power role\n");
+ return -EIO;
+ }
+
+ ret = sysfs_match_string(typec_roles, buf);
+ if (ret < 0)
+ 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]);
+ ret = -EOPNOTSUPP;
+ goto unlock_and_ret;
+ }
+
+ ret = port->cap->pr_set(port->cap, ret);
+ if (ret)
+ goto unlock_and_ret;
+
+ ret = size;
+unlock_and_ret:
+ mutex_unlock(&port->port_type_lock);
+ return ret;
+}
+
+static ssize_t power_role_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ if (port->cap->type == TYPEC_PORT_DRP)
+ return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ?
+ "[source] sink" : "source [sink]");
+
+ return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]);
+}
+static DEVICE_ATTR_RW(power_role);
+
+static ssize_t
+port_type_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_port *port = to_typec_port(dev);
+ int ret;
+ enum typec_port_type type;
+
+ if (!port->cap->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
+ dev_dbg(dev, "changing port type not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ ret = sysfs_match_string(typec_port_types, buf);
+ if (ret < 0)
+ return ret;
+
+ type = ret;
+ mutex_lock(&port->port_type_lock);
+
+ if (port->port_type == type) {
+ ret = size;
+ goto unlock_and_ret;
+ }
+
+ ret = port->cap->port_type_set(port->cap, type);
+ if (ret)
+ goto unlock_and_ret;
+
+ port->port_type = type;
+ ret = size;
+
+unlock_and_ret:
+ mutex_unlock(&port->port_type_lock);
+ return ret;
+}
+
+static ssize_t
+port_type_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ if (port->cap->type == TYPEC_PORT_DRP)
+ return sprintf(buf, "%s\n",
+ typec_port_types_drp[port->port_type]);
+
+ return sprintf(buf, "[%s]\n", typec_port_types[port->cap->type]);
+}
+static DEVICE_ATTR_RW(port_type);
+
+static const char * const typec_pwr_opmodes[] = {
+ [TYPEC_PWR_MODE_USB] = "default",
+ [TYPEC_PWR_MODE_1_5A] = "1.5A",
+ [TYPEC_PWR_MODE_3_0A] = "3.0A",
+ [TYPEC_PWR_MODE_PD] = "usb_power_delivery",
+};
+
+static ssize_t power_operation_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]);
+}
+static DEVICE_ATTR_RO(power_operation_mode);
+
+static ssize_t vconn_source_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_port *port = to_typec_port(dev);
+ bool source;
+ int ret;
+
+ if (!port->cap->pd_revision) {
+ dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (!port->cap->vconn_set) {
+ dev_dbg(dev, "VCONN swapping not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ ret = kstrtobool(buf, &source);
+ if (ret)
+ return ret;
+
+ ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
+ if (ret)
+ return ret;
+
+ return size;
+}
+
+static ssize_t vconn_source_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ return sprintf(buf, "%s\n",
+ port->vconn_role == TYPEC_SOURCE ? "yes" : "no");
+}
+static DEVICE_ATTR_RW(vconn_source);
+
+static ssize_t supported_accessory_modes_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+ ssize_t ret = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) {
+ if (port->cap->accessory[i])
+ ret += sprintf(buf + ret, "%s ",
+ typec_accessory_modes[port->cap->accessory[i]]);
+ }
+
+ if (!ret)
+ return sprintf(buf, "none\n");
+
+ buf[ret - 1] = '\n';
+
+ return ret;
+}
+static DEVICE_ATTR_RO(supported_accessory_modes);
+
+static ssize_t usb_typec_revision_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *port = to_typec_port(dev);
+ u16 rev = port->cap->revision;
+
+ return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
+}
+static DEVICE_ATTR_RO(usb_typec_revision);
+
+static ssize_t usb_power_delivery_revision_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct typec_port *p = to_typec_port(dev);
+
+ return sprintf(buf, "%d\n", (p->cap->pd_revision >> 8) & 0xff);
+}
+static DEVICE_ATTR_RO(usb_power_delivery_revision);
+
+static struct attribute *typec_attrs[] = {
+ &dev_attr_data_role.attr,
+ &dev_attr_power_operation_mode.attr,
+ &dev_attr_power_role.attr,
+ &dev_attr_preferred_role.attr,
+ &dev_attr_supported_accessory_modes.attr,
+ &dev_attr_usb_power_delivery_revision.attr,
+ &dev_attr_usb_typec_revision.attr,
+ &dev_attr_vconn_source.attr,
+ &dev_attr_port_type.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(typec);
+
+static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ int ret;
+
+ ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev));
+ if (ret)
+ dev_err(dev, "failed to add uevent TYPEC_PORT\n");
+
+ return ret;
+}
+
+static void typec_release(struct device *dev)
+{
+ struct typec_port *port = to_typec_port(dev);
+
+ ida_simple_remove(&typec_index_ida, port->id);
+ typec_switch_put(port->sw);
+ typec_mux_put(port->mux);
+ kfree(port);
+}
+
+static const struct device_type typec_port_dev_type = {
+ .name = "typec_port",
+ .groups = typec_groups,
+ .uevent = typec_uevent,
+ .release = typec_release,
+};
+
+/* --------------------------------------- */
+/* Driver callbacks to report role updates */
+
+/**
+ * typec_set_data_role - Report data role change
+ * @port: The USB Type-C Port where the role was changed
+ * @role: The new data role
+ *
+ * This routine is used by the port drivers to report data role changes.
+ */
+void typec_set_data_role(struct typec_port *port, enum typec_data_role role)
+{
+ if (port->data_role == role)
+ return;
+
+ port->data_role = role;
+ sysfs_notify(&port->dev.kobj, NULL, "data_role");
+ kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
+}
+EXPORT_SYMBOL_GPL(typec_set_data_role);
+
+/**
+ * typec_set_pwr_role - Report power role change
+ * @port: The USB Type-C Port where the role was changed
+ * @role: The new data role
+ *
+ * This routine is used by the port drivers to report power role changes.
+ */
+void typec_set_pwr_role(struct typec_port *port, enum typec_role role)
+{
+ if (port->pwr_role == role)
+ return;
+
+ port->pwr_role = role;
+ sysfs_notify(&port->dev.kobj, NULL, "power_role");
+ kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
+}
+EXPORT_SYMBOL_GPL(typec_set_pwr_role);
+
+/**
+ * typec_set_pwr_role - Report VCONN source change
+ * @port: The USB Type-C Port which VCONN role changed
+ * @role: Source when @port is sourcing VCONN, or Sink when it's not
+ *
+ * This routine is used by the port drivers to report if the VCONN source is
+ * changes.
+ */
+void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
+{
+ if (port->vconn_role == role)
+ return;
+
+ port->vconn_role = role;
+ sysfs_notify(&port->dev.kobj, NULL, "vconn_source");
+ kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
+}
+EXPORT_SYMBOL_GPL(typec_set_vconn_role);
+
+static int partner_match(struct device *dev, void *data)
+{
+ return is_typec_partner(dev);
+}
+
+/**
+ * typec_set_pwr_opmode - Report changed power operation mode
+ * @port: The USB Type-C Port where the mode was changed
+ * @opmode: New power operation mode
+ *
+ * This routine is used by the port drivers to report changed power operation
+ * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB
+ * Type-C specification, and "USB Power Delivery" when the power levels are
+ * negotiated with methods defined in USB Power Delivery specification.
+ */
+void typec_set_pwr_opmode(struct typec_port *port,
+ enum typec_pwr_opmode opmode)
+{
+ struct device *partner_dev;
+
+ if (port->pwr_opmode == opmode)
+ return;
+
+ port->pwr_opmode = opmode;
+ sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
+ kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
+
+ partner_dev = device_find_child(&port->dev, NULL, partner_match);
+ if (partner_dev) {
+ struct typec_partner *partner = to_typec_partner(partner_dev);
+
+ if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
+ partner->usb_pd = 1;
+ sysfs_notify(&partner_dev->kobj, NULL,
+ "supports_usb_power_delivery");
+ }
+ put_device(partner_dev);
+ }
+}
+EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
+
+/* ------------------------------------------ */
+/* API for Multiplexer/DeMultiplexer Switches */
+
+/**
+ * typec_set_orientation - Set USB Type-C cable plug orientation
+ * @port: USB Type-C Port
+ * @orientation: USB Type-C cable plug orientation
+ *
+ * Set cable plug orientation for @port.
+ */
+int typec_set_orientation(struct typec_port *port,
+ enum typec_orientation orientation)
+{
+ int ret;
+
+ if (port->sw) {
+ ret = port->sw->set(port->sw, orientation);
+ if (ret)
+ return ret;
+ }
+
+ port->orientation = orientation;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_set_orientation);
+
+/**
+ * typec_set_mode - Set mode of operation for USB Type-C connector
+ * @port: USB Type-C port for the connector
+ * @mode: Operation mode for the connector
+ *
+ * Set mode @mode for @port. This function will configure the muxes needed to
+ * enter @mode.
+ */
+int typec_set_mode(struct typec_port *port, int mode)
+{
+ return port->mux ? port->mux->set(port->mux, mode) : 0;
+}
+EXPORT_SYMBOL_GPL(typec_set_mode);
+
+/* --------------------------------------- */
+
+/**
+ * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
+ * @port: USB Type-C Port that supports the alternate mode
+ * @desc: Description of the alternate mode
+ *
+ * This routine is used to register an alternate mode that @port is capable of
+ * supporting.
+ *
+ * Returns handle to the alternate mode on success or ERR_PTR on failure.
+ */
+struct typec_altmode *
+typec_port_register_altmode(struct typec_port *port,
+ const struct typec_altmode_desc *desc)
+{
+ return typec_register_altmode(&port->dev, desc);
+}
+EXPORT_SYMBOL_GPL(typec_port_register_altmode);
+
+/**
+ * typec_register_port - Register a USB Type-C Port
+ * @parent: Parent device
+ * @cap: Description of the port
+ *
+ * Registers a device for USB Type-C Port described in @cap.
+ *
+ * Returns handle to the port on success or ERR_PTR on failure.
+ */
+struct typec_port *typec_register_port(struct device *parent,
+ const struct typec_capability *cap)
+{
+ struct typec_port *port;
+ int role;
+ int ret;
+ int id;
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return ERR_PTR(-ENOMEM);
+
+ id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
+ if (id < 0) {
+ kfree(port);
+ return ERR_PTR(id);
+ }
+
+ port->sw = typec_switch_get(cap->fwnode ? &port->dev : parent);
+ if (IS_ERR(port->sw)) {
+ ret = PTR_ERR(port->sw);
+ goto err_switch;
+ }
+
+ port->mux = typec_mux_get(cap->fwnode ? &port->dev : parent);
+ if (IS_ERR(port->mux)) {
+ ret = PTR_ERR(port->mux);
+ 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;
+ port->pwr_role = TYPEC_SOURCE;
+ port->vconn_role = TYPEC_SOURCE;
+ } else {
+ port->data_role = TYPEC_DEVICE;
+ port->pwr_role = TYPEC_SINK;
+ port->vconn_role = TYPEC_SINK;
+ }
+
+ port->id = id;
+ port->cap = cap;
+ port->port_type = cap->type;
+ mutex_init(&port->port_type_lock);
+ port->prefer_role = cap->prefer_role;
+
+ port->dev.class = typec_class;
+ port->dev.parent = parent;
+ port->dev.fwnode = cap->fwnode;
+ port->dev.type = &typec_port_dev_type;
+ dev_set_name(&port->dev, "port%d", id);
+
+ ret = device_register(&port->dev);
+ if (ret) {
+ dev_err(parent, "failed to register port (%d)\n", ret);
+ put_device(&port->dev);
+ return ERR_PTR(ret);
+ }
+
+ return port;
+
+err_mux:
+ typec_switch_put(port->sw);
+
+err_switch:
+ ida_simple_remove(&typec_index_ida, port->id);
+ kfree(port);
+
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(typec_register_port);
+
+/**
+ * typec_unregister_port - Unregister a USB Type-C Port
+ * @port: The port to be unregistered
+ *
+ * Unregister device created with typec_register_port().
+ */
+void typec_unregister_port(struct typec_port *port)
+{
+ if (!IS_ERR_OR_NULL(port))
+ device_unregister(&port->dev);
+}
+EXPORT_SYMBOL_GPL(typec_unregister_port);
+
+static int __init typec_init(void)
+{
+ typec_class = class_create(THIS_MODULE, "typec");
+ return PTR_ERR_OR_ZERO(typec_class);
+}
+subsys_initcall(typec_init);
+
+static void __exit typec_exit(void)
+{
+ class_destroy(typec_class);
+ ida_destroy(&typec_index_ida);
+}
+module_exit(typec_exit);
+
+MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("USB Type-C Connector Class");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * USB Type-C Multiplexer/DeMultiplexer Switch support
+ *
+ * Copyright (C) 2018 Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/usb/typec_mux.h>
+
+static DEFINE_MUTEX(switch_lock);
+static DEFINE_MUTEX(mux_lock);
+static LIST_HEAD(switch_list);
+static LIST_HEAD(mux_list);
+
+static void *typec_switch_match(struct device_connection *con, int ep,
+ void *data)
+{
+ struct typec_switch *sw;
+
+ list_for_each_entry(sw, &switch_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(sw->dev)))
+ return sw;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_switch_get - Find USB Type-C orientation switch
+ * @dev: The caller device
+ *
+ * Finds a switch linked with @dev. Returns a reference to the switch on
+ * success, NULL if no matching connection was found, or
+ * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch
+ * has not been enumerated yet.
+ */
+struct typec_switch *typec_switch_get(struct device *dev)
+{
+ struct typec_switch *sw;
+
+ mutex_lock(&switch_lock);
+ sw = device_connection_find_match(dev, "typec-switch", NULL,
+ typec_switch_match);
+ if (!IS_ERR_OR_NULL(sw))
+ get_device(sw->dev);
+ mutex_unlock(&switch_lock);
+
+ return sw;
+}
+EXPORT_SYMBOL_GPL(typec_switch_get);
+
+/**
+ * typec_put_switch - Release USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Decrement reference count for @sw.
+ */
+void typec_switch_put(struct typec_switch *sw)
+{
+ if (!IS_ERR_OR_NULL(sw))
+ put_device(sw->dev);
+}
+EXPORT_SYMBOL_GPL(typec_switch_put);
+
+/**
+ * typec_switch_register - Register USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * This function registers a switch that can be used for routing the correct
+ * data pairs depending on the cable plug orientation from the USB Type-C
+ * connector to the USB controllers. USB Type-C plugs can be inserted
+ * right-side-up or upside-down.
+ */
+int typec_switch_register(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_add_tail(&sw->entry, &switch_list);
+ mutex_unlock(&switch_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_switch_register);
+
+/**
+ * typec_switch_unregister - Unregister USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Unregister switch that was registered with typec_switch_register().
+ */
+void typec_switch_unregister(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_del(&sw->entry);
+ mutex_unlock(&switch_lock);
+}
+EXPORT_SYMBOL_GPL(typec_switch_unregister);
+
+/* ------------------------------------------------------------------------- */
+
+static void *typec_mux_match(struct device_connection *con, int ep, void *data)
+{
+ struct typec_mux *mux;
+
+ list_for_each_entry(mux, &mux_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(mux->dev)))
+ return mux;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_mux_get - Find USB Type-C Multiplexer
+ * @dev: The caller device
+ *
+ * Finds a mux linked to the caller. This function is primarily meant for the
+ * Type-C drivers. Returns a reference to the mux on success, NULL if no
+ * matching connection was found, or ERR_PTR(-EPROBE_DEFER) when a connection
+ * was found but the mux has not been enumerated yet.
+ */
+struct typec_mux *typec_mux_get(struct device *dev)
+{
+ struct typec_mux *mux;
+
+ mutex_lock(&mux_lock);
+ mux = device_connection_find_match(dev, "typec-mux", NULL,
+ typec_mux_match);
+ if (!IS_ERR_OR_NULL(mux))
+ get_device(mux->dev);
+ mutex_unlock(&mux_lock);
+
+ return mux;
+}
+EXPORT_SYMBOL_GPL(typec_mux_get);
+
+/**
+ * typec_mux_put - Release handle to a Multiplexer
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Decrements reference count for @mux.
+ */
+void typec_mux_put(struct typec_mux *mux)
+{
+ if (!IS_ERR_OR_NULL(mux))
+ put_device(mux->dev);
+}
+EXPORT_SYMBOL_GPL(typec_mux_put);
+
+/**
+ * typec_mux_register - Register Multiplexer routing USB Type-C pins
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * USB Type-C connectors can be used for alternate modes of operation besides
+ * USB when Accessory/Alternate Modes are supported. With some of those modes,
+ * the pins on the connector need to be reconfigured. This function registers
+ * multiplexer switches routing the pins on the connector.
+ */
+int typec_mux_register(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_add_tail(&mux->entry, &mux_list);
+ mutex_unlock(&mux_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_mux_register);
+
+/**
+ * typec_mux_unregister - Unregister Multiplexer Switch
+ * @sw: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Unregister mux that was registered with typec_mux_register().
+ */
+void typec_mux_unregister(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_del(&mux->entry);
+ mutex_unlock(&mux_lock);
+}
+EXPORT_SYMBOL_GPL(typec_mux_unregister);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * USB Type-C Connector Class
- *
- * Copyright (C) 2017, Intel Corporation
- * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/usb/typec.h>
-
-struct typec_mode {
- int index;
- u32 vdo;
- char *desc;
- enum typec_port_type roles;
-
- struct typec_altmode *alt_mode;
-
- unsigned int active:1;
-
- char group_name[6];
- struct attribute_group group;
- struct attribute *attrs[5];
- struct device_attribute vdo_attr;
- struct device_attribute desc_attr;
- struct device_attribute active_attr;
- struct device_attribute roles_attr;
-};
-
-struct typec_altmode {
- struct device dev;
- u16 svid;
- int n_modes;
- struct typec_mode modes[ALTMODE_MAX_MODES];
- const struct attribute_group *mode_groups[ALTMODE_MAX_MODES];
-};
-
-struct typec_plug {
- struct device dev;
- enum typec_plug_index index;
-};
-
-struct typec_cable {
- struct device dev;
- enum typec_plug_type type;
- struct usb_pd_identity *identity;
- unsigned int active:1;
-};
-
-struct typec_partner {
- struct device dev;
- unsigned int usb_pd:1;
- struct usb_pd_identity *identity;
- enum typec_accessory accessory;
-};
-
-struct typec_port {
- unsigned int id;
- struct device dev;
-
- int prefer_role;
- enum typec_data_role data_role;
- enum typec_role pwr_role;
- enum typec_role vconn_role;
- enum typec_pwr_opmode pwr_opmode;
- enum typec_port_type port_type;
- struct mutex port_type_lock;
-
- const struct typec_capability *cap;
-};
-
-#define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
-#define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev)
-#define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev)
-#define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev)
-#define to_altmode(_dev_) container_of(_dev_, struct typec_altmode, dev)
-
-static const struct device_type typec_partner_dev_type;
-static const struct device_type typec_cable_dev_type;
-static const struct device_type typec_plug_dev_type;
-static const struct device_type typec_port_dev_type;
-
-#define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type)
-#define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type)
-#define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type)
-#define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
-
-static DEFINE_IDA(typec_index_ida);
-static struct class *typec_class;
-
-/* Common attributes */
-
-static const char * const typec_accessory_modes[] = {
- [TYPEC_ACCESSORY_NONE] = "none",
- [TYPEC_ACCESSORY_AUDIO] = "analog_audio",
- [TYPEC_ACCESSORY_DEBUG] = "debug",
-};
-
-static struct usb_pd_identity *get_pd_identity(struct device *dev)
-{
- if (is_typec_partner(dev)) {
- struct typec_partner *partner = to_typec_partner(dev);
-
- return partner->identity;
- } else if (is_typec_cable(dev)) {
- struct typec_cable *cable = to_typec_cable(dev);
-
- return cable->identity;
- }
- return NULL;
-}
-
-static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct usb_pd_identity *id = get_pd_identity(dev);
-
- return sprintf(buf, "0x%08x\n", id->id_header);
-}
-static DEVICE_ATTR_RO(id_header);
-
-static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct usb_pd_identity *id = get_pd_identity(dev);
-
- return sprintf(buf, "0x%08x\n", id->cert_stat);
-}
-static DEVICE_ATTR_RO(cert_stat);
-
-static ssize_t product_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct usb_pd_identity *id = get_pd_identity(dev);
-
- return sprintf(buf, "0x%08x\n", id->product);
-}
-static DEVICE_ATTR_RO(product);
-
-static struct attribute *usb_pd_id_attrs[] = {
- &dev_attr_id_header.attr,
- &dev_attr_cert_stat.attr,
- &dev_attr_product.attr,
- NULL
-};
-
-static const struct attribute_group usb_pd_id_group = {
- .name = "identity",
- .attrs = usb_pd_id_attrs,
-};
-
-static const struct attribute_group *usb_pd_id_groups[] = {
- &usb_pd_id_group,
- NULL,
-};
-
-static void typec_report_identity(struct device *dev)
-{
- sysfs_notify(&dev->kobj, "identity", "id_header");
- sysfs_notify(&dev->kobj, "identity", "cert_stat");
- sysfs_notify(&dev->kobj, "identity", "product");
-}
-
-/* ------------------------------------------------------------------------- */
-/* Alternate Modes */
-
-/**
- * typec_altmode_update_active - Report Enter/Exit mode
- * @alt: Handle to the alternate mode
- * @mode: Mode index
- * @active: True when the mode has been entered
- *
- * If a partner or cable plug executes Enter/Exit Mode command successfully, the
- * drivers use this routine to report the updated state of the mode.
- */
-void typec_altmode_update_active(struct typec_altmode *alt, int mode,
- bool active)
-{
- struct typec_mode *m = &alt->modes[mode];
- char dir[6];
-
- if (m->active == active)
- return;
-
- m->active = active;
- snprintf(dir, sizeof(dir), "mode%d", mode);
- sysfs_notify(&alt->dev.kobj, dir, "active");
- kobject_uevent(&alt->dev.kobj, KOBJ_CHANGE);
-}
-EXPORT_SYMBOL_GPL(typec_altmode_update_active);
-
-/**
- * typec_altmode2port - Alternate Mode to USB Type-C port
- * @alt: The Alternate Mode
- *
- * Returns handle to the port that a cable plug or partner with @alt is
- * connected to.
- */
-struct typec_port *typec_altmode2port(struct typec_altmode *alt)
-{
- if (is_typec_plug(alt->dev.parent))
- return to_typec_port(alt->dev.parent->parent->parent);
- if (is_typec_partner(alt->dev.parent))
- return to_typec_port(alt->dev.parent->parent);
- if (is_typec_port(alt->dev.parent))
- return to_typec_port(alt->dev.parent);
-
- return NULL;
-}
-EXPORT_SYMBOL_GPL(typec_altmode2port);
-
-static ssize_t
-typec_altmode_vdo_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_mode *mode = container_of(attr, struct typec_mode,
- vdo_attr);
-
- return sprintf(buf, "0x%08x\n", mode->vdo);
-}
-
-static ssize_t
-typec_altmode_desc_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_mode *mode = container_of(attr, struct typec_mode,
- desc_attr);
-
- return sprintf(buf, "%s\n", mode->desc ? mode->desc : "");
-}
-
-static ssize_t
-typec_altmode_active_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_mode *mode = container_of(attr, struct typec_mode,
- active_attr);
-
- return sprintf(buf, "%s\n", mode->active ? "yes" : "no");
-}
-
-static ssize_t
-typec_altmode_active_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_mode *mode = container_of(attr, struct typec_mode,
- active_attr);
- struct typec_port *port = typec_altmode2port(mode->alt_mode);
- bool activate;
- int ret;
-
- if (!port->cap->activate_mode)
- return -EOPNOTSUPP;
-
- ret = kstrtobool(buf, &activate);
- if (ret)
- return ret;
-
- ret = port->cap->activate_mode(port->cap, mode->index, activate);
- if (ret)
- return ret;
-
- return size;
-}
-
-static ssize_t
-typec_altmode_roles_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_mode *mode = container_of(attr, struct typec_mode,
- roles_attr);
- ssize_t ret;
-
- switch (mode->roles) {
- case TYPEC_PORT_DFP:
- ret = sprintf(buf, "source\n");
- break;
- case TYPEC_PORT_UFP:
- ret = sprintf(buf, "sink\n");
- break;
- case TYPEC_PORT_DRP:
- default:
- ret = sprintf(buf, "source sink\n");
- break;
- }
- return ret;
-}
-
-static void typec_init_modes(struct typec_altmode *alt,
- const struct typec_mode_desc *desc, bool is_port)
-{
- int i;
-
- for (i = 0; i < alt->n_modes; i++, desc++) {
- struct typec_mode *mode = &alt->modes[i];
-
- /* Not considering the human readable description critical */
- mode->desc = kstrdup(desc->desc, GFP_KERNEL);
- if (desc->desc && !mode->desc)
- dev_err(&alt->dev, "failed to copy mode%d desc\n", i);
-
- mode->alt_mode = alt;
- mode->vdo = desc->vdo;
- mode->roles = desc->roles;
- mode->index = desc->index;
- sprintf(mode->group_name, "mode%d", desc->index);
-
- sysfs_attr_init(&mode->vdo_attr.attr);
- mode->vdo_attr.attr.name = "vdo";
- mode->vdo_attr.attr.mode = 0444;
- mode->vdo_attr.show = typec_altmode_vdo_show;
-
- sysfs_attr_init(&mode->desc_attr.attr);
- mode->desc_attr.attr.name = "description";
- mode->desc_attr.attr.mode = 0444;
- mode->desc_attr.show = typec_altmode_desc_show;
-
- sysfs_attr_init(&mode->active_attr.attr);
- mode->active_attr.attr.name = "active";
- mode->active_attr.attr.mode = 0644;
- mode->active_attr.show = typec_altmode_active_show;
- mode->active_attr.store = typec_altmode_active_store;
-
- mode->attrs[0] = &mode->vdo_attr.attr;
- mode->attrs[1] = &mode->desc_attr.attr;
- mode->attrs[2] = &mode->active_attr.attr;
-
- /* With ports, list the roles that the mode is supported with */
- if (is_port) {
- sysfs_attr_init(&mode->roles_attr.attr);
- mode->roles_attr.attr.name = "supported_roles";
- mode->roles_attr.attr.mode = 0444;
- mode->roles_attr.show = typec_altmode_roles_show;
-
- mode->attrs[3] = &mode->roles_attr.attr;
- }
-
- mode->group.attrs = mode->attrs;
- mode->group.name = mode->group_name;
-
- alt->mode_groups[i] = &mode->group;
- }
-}
-
-static ssize_t svid_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_altmode *alt = to_altmode(dev);
-
- return sprintf(buf, "%04x\n", alt->svid);
-}
-static DEVICE_ATTR_RO(svid);
-
-static struct attribute *typec_altmode_attrs[] = {
- &dev_attr_svid.attr,
- NULL
-};
-ATTRIBUTE_GROUPS(typec_altmode);
-
-static void typec_altmode_release(struct device *dev)
-{
- struct typec_altmode *alt = to_altmode(dev);
- int i;
-
- for (i = 0; i < alt->n_modes; i++)
- kfree(alt->modes[i].desc);
- kfree(alt);
-}
-
-static const struct device_type typec_altmode_dev_type = {
- .name = "typec_alternate_mode",
- .groups = typec_altmode_groups,
- .release = typec_altmode_release,
-};
-
-static struct typec_altmode *
-typec_register_altmode(struct device *parent,
- const struct typec_altmode_desc *desc)
-{
- struct typec_altmode *alt;
- int ret;
-
- alt = kzalloc(sizeof(*alt), GFP_KERNEL);
- if (!alt)
- return ERR_PTR(-ENOMEM);
-
- alt->svid = desc->svid;
- alt->n_modes = desc->n_modes;
- typec_init_modes(alt, desc->modes, is_typec_port(parent));
-
- alt->dev.parent = parent;
- alt->dev.groups = alt->mode_groups;
- alt->dev.type = &typec_altmode_dev_type;
- dev_set_name(&alt->dev, "svid-%04x", alt->svid);
-
- ret = device_register(&alt->dev);
- if (ret) {
- dev_err(parent, "failed to register alternate mode (%d)\n",
- ret);
- put_device(&alt->dev);
- return ERR_PTR(ret);
- }
-
- return alt;
-}
-
-/**
- * typec_unregister_altmode - Unregister Alternate Mode
- * @alt: The alternate mode to be unregistered
- *
- * Unregister device created with typec_partner_register_altmode(),
- * typec_plug_register_altmode() or typec_port_register_altmode().
- */
-void typec_unregister_altmode(struct typec_altmode *alt)
-{
- if (!IS_ERR_OR_NULL(alt))
- device_unregister(&alt->dev);
-}
-EXPORT_SYMBOL_GPL(typec_unregister_altmode);
-
-/* ------------------------------------------------------------------------- */
-/* Type-C Partners */
-
-static ssize_t accessory_mode_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_partner *p = to_typec_partner(dev);
-
- return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
-}
-static DEVICE_ATTR_RO(accessory_mode);
-
-static ssize_t supports_usb_power_delivery_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_partner *p = to_typec_partner(dev);
-
- return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no");
-}
-static DEVICE_ATTR_RO(supports_usb_power_delivery);
-
-static struct attribute *typec_partner_attrs[] = {
- &dev_attr_accessory_mode.attr,
- &dev_attr_supports_usb_power_delivery.attr,
- NULL
-};
-ATTRIBUTE_GROUPS(typec_partner);
-
-static void typec_partner_release(struct device *dev)
-{
- struct typec_partner *partner = to_typec_partner(dev);
-
- kfree(partner);
-}
-
-static const struct device_type typec_partner_dev_type = {
- .name = "typec_partner",
- .groups = typec_partner_groups,
- .release = typec_partner_release,
-};
-
-/**
- * typec_partner_set_identity - Report result from Discover Identity command
- * @partner: The partner updated identity values
- *
- * This routine is used to report that the result of Discover Identity USB power
- * delivery command has become available.
- */
-int typec_partner_set_identity(struct typec_partner *partner)
-{
- if (!partner->identity)
- return -EINVAL;
-
- typec_report_identity(&partner->dev);
- return 0;
-}
-EXPORT_SYMBOL_GPL(typec_partner_set_identity);
-
-/**
- * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode
- * @partner: USB Type-C Partner that supports the alternate mode
- * @desc: Description of the alternate mode
- *
- * This routine is used to register each alternate mode individually that
- * @partner has listed in response to Discover SVIDs command. The modes for a
- * SVID listed in response to Discover Modes command need to be listed in an
- * array in @desc.
- *
- * Returns handle to the alternate mode on success or NULL on failure.
- */
-struct typec_altmode *
-typec_partner_register_altmode(struct typec_partner *partner,
- const struct typec_altmode_desc *desc)
-{
- return typec_register_altmode(&partner->dev, desc);
-}
-EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
-
-/**
- * typec_register_partner - Register a USB Type-C Partner
- * @port: The USB Type-C Port the partner is connected to
- * @desc: Description of the partner
- *
- * Registers a device for USB Type-C Partner described in @desc.
- *
- * Returns handle to the partner on success or ERR_PTR on failure.
- */
-struct typec_partner *typec_register_partner(struct typec_port *port,
- struct typec_partner_desc *desc)
-{
- struct typec_partner *partner;
- int ret;
-
- partner = kzalloc(sizeof(*partner), GFP_KERNEL);
- if (!partner)
- return ERR_PTR(-ENOMEM);
-
- partner->usb_pd = desc->usb_pd;
- partner->accessory = desc->accessory;
-
- if (desc->identity) {
- /*
- * Creating directory for the identity only if the driver is
- * able to provide data to it.
- */
- partner->dev.groups = usb_pd_id_groups;
- partner->identity = desc->identity;
- }
-
- partner->dev.class = typec_class;
- partner->dev.parent = &port->dev;
- partner->dev.type = &typec_partner_dev_type;
- dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev));
-
- ret = device_register(&partner->dev);
- if (ret) {
- dev_err(&port->dev, "failed to register partner (%d)\n", ret);
- put_device(&partner->dev);
- return ERR_PTR(ret);
- }
-
- return partner;
-}
-EXPORT_SYMBOL_GPL(typec_register_partner);
-
-/**
- * typec_unregister_partner - Unregister a USB Type-C Partner
- * @partner: The partner to be unregistered
- *
- * Unregister device created with typec_register_partner().
- */
-void typec_unregister_partner(struct typec_partner *partner)
-{
- if (!IS_ERR_OR_NULL(partner))
- device_unregister(&partner->dev);
-}
-EXPORT_SYMBOL_GPL(typec_unregister_partner);
-
-/* ------------------------------------------------------------------------- */
-/* Type-C Cable Plugs */
-
-static void typec_plug_release(struct device *dev)
-{
- struct typec_plug *plug = to_typec_plug(dev);
-
- kfree(plug);
-}
-
-static const struct device_type typec_plug_dev_type = {
- .name = "typec_plug",
- .release = typec_plug_release,
-};
-
-/**
- * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode
- * @plug: USB Type-C Cable Plug that supports the alternate mode
- * @desc: Description of the alternate mode
- *
- * This routine is used to register each alternate mode individually that @plug
- * has listed in response to Discover SVIDs command. The modes for a SVID that
- * the plug lists in response to Discover Modes command need to be listed in an
- * array in @desc.
- *
- * Returns handle to the alternate mode on success or ERR_PTR on failure.
- */
-struct typec_altmode *
-typec_plug_register_altmode(struct typec_plug *plug,
- const struct typec_altmode_desc *desc)
-{
- return typec_register_altmode(&plug->dev, desc);
-}
-EXPORT_SYMBOL_GPL(typec_plug_register_altmode);
-
-/**
- * typec_register_plug - Register a USB Type-C Cable Plug
- * @cable: USB Type-C Cable with the plug
- * @desc: Description of the cable plug
- *
- * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C
- * Cable Plug represents a plug with electronics in it that can response to USB
- * Power Delivery SOP Prime or SOP Double Prime packages.
- *
- * Returns handle to the cable plug on success or ERR_PTR on failure.
- */
-struct typec_plug *typec_register_plug(struct typec_cable *cable,
- struct typec_plug_desc *desc)
-{
- struct typec_plug *plug;
- char name[8];
- int ret;
-
- plug = kzalloc(sizeof(*plug), GFP_KERNEL);
- if (!plug)
- return ERR_PTR(-ENOMEM);
-
- sprintf(name, "plug%d", desc->index);
-
- plug->index = desc->index;
- plug->dev.class = typec_class;
- plug->dev.parent = &cable->dev;
- plug->dev.type = &typec_plug_dev_type;
- dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name);
-
- ret = device_register(&plug->dev);
- if (ret) {
- dev_err(&cable->dev, "failed to register plug (%d)\n", ret);
- put_device(&plug->dev);
- return ERR_PTR(ret);
- }
-
- return plug;
-}
-EXPORT_SYMBOL_GPL(typec_register_plug);
-
-/**
- * typec_unregister_plug - Unregister a USB Type-C Cable Plug
- * @plug: The cable plug to be unregistered
- *
- * Unregister device created with typec_register_plug().
- */
-void typec_unregister_plug(struct typec_plug *plug)
-{
- if (!IS_ERR_OR_NULL(plug))
- device_unregister(&plug->dev);
-}
-EXPORT_SYMBOL_GPL(typec_unregister_plug);
-
-/* Type-C Cables */
-
-static ssize_t
-type_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct typec_cable *cable = to_typec_cable(dev);
-
- return sprintf(buf, "%s\n", cable->active ? "active" : "passive");
-}
-static DEVICE_ATTR_RO(type);
-
-static const char * const typec_plug_types[] = {
- [USB_PLUG_NONE] = "unknown",
- [USB_PLUG_TYPE_A] = "type-a",
- [USB_PLUG_TYPE_B] = "type-b",
- [USB_PLUG_TYPE_C] = "type-c",
- [USB_PLUG_CAPTIVE] = "captive",
-};
-
-static ssize_t plug_type_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct typec_cable *cable = to_typec_cable(dev);
-
- return sprintf(buf, "%s\n", typec_plug_types[cable->type]);
-}
-static DEVICE_ATTR_RO(plug_type);
-
-static struct attribute *typec_cable_attrs[] = {
- &dev_attr_type.attr,
- &dev_attr_plug_type.attr,
- NULL
-};
-ATTRIBUTE_GROUPS(typec_cable);
-
-static void typec_cable_release(struct device *dev)
-{
- struct typec_cable *cable = to_typec_cable(dev);
-
- kfree(cable);
-}
-
-static const struct device_type typec_cable_dev_type = {
- .name = "typec_cable",
- .groups = typec_cable_groups,
- .release = typec_cable_release,
-};
-
-/**
- * typec_cable_set_identity - Report result from Discover Identity command
- * @cable: The cable updated identity values
- *
- * This routine is used to report that the result of Discover Identity USB power
- * delivery command has become available.
- */
-int typec_cable_set_identity(struct typec_cable *cable)
-{
- if (!cable->identity)
- return -EINVAL;
-
- typec_report_identity(&cable->dev);
- return 0;
-}
-EXPORT_SYMBOL_GPL(typec_cable_set_identity);
-
-/**
- * typec_register_cable - Register a USB Type-C Cable
- * @port: The USB Type-C Port the cable is connected to
- * @desc: Description of the cable
- *
- * Registers a device for USB Type-C Cable described in @desc. The cable will be
- * parent for the optional cable plug devises.
- *
- * Returns handle to the cable on success or ERR_PTR on failure.
- */
-struct typec_cable *typec_register_cable(struct typec_port *port,
- struct typec_cable_desc *desc)
-{
- struct typec_cable *cable;
- int ret;
-
- cable = kzalloc(sizeof(*cable), GFP_KERNEL);
- if (!cable)
- return ERR_PTR(-ENOMEM);
-
- cable->type = desc->type;
- cable->active = desc->active;
-
- if (desc->identity) {
- /*
- * Creating directory for the identity only if the driver is
- * able to provide data to it.
- */
- cable->dev.groups = usb_pd_id_groups;
- cable->identity = desc->identity;
- }
-
- cable->dev.class = typec_class;
- cable->dev.parent = &port->dev;
- cable->dev.type = &typec_cable_dev_type;
- dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev));
-
- ret = device_register(&cable->dev);
- if (ret) {
- dev_err(&port->dev, "failed to register cable (%d)\n", ret);
- put_device(&cable->dev);
- return ERR_PTR(ret);
- }
-
- return cable;
-}
-EXPORT_SYMBOL_GPL(typec_register_cable);
-
-/**
- * typec_unregister_cable - Unregister a USB Type-C Cable
- * @cable: The cable to be unregistered
- *
- * Unregister device created with typec_register_cable().
- */
-void typec_unregister_cable(struct typec_cable *cable)
-{
- if (!IS_ERR_OR_NULL(cable))
- device_unregister(&cable->dev);
-}
-EXPORT_SYMBOL_GPL(typec_unregister_cable);
-
-/* ------------------------------------------------------------------------- */
-/* USB Type-C ports */
-
-static const char * const typec_roles[] = {
- [TYPEC_SINK] = "sink",
- [TYPEC_SOURCE] = "source",
-};
-
-static const char * const typec_data_roles[] = {
- [TYPEC_DEVICE] = "device",
- [TYPEC_HOST] = "host",
-};
-
-static const char * const typec_port_types[] = {
- [TYPEC_PORT_DFP] = "source",
- [TYPEC_PORT_UFP] = "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_DRP] = "[dual] source sink",
-};
-
-static ssize_t
-preferred_role_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_port *port = to_typec_port(dev);
- int role;
- int ret;
-
- if (port->cap->type != TYPEC_PORT_DRP) {
- dev_dbg(dev, "Preferred role only supported with DRP ports\n");
- return -EOPNOTSUPP;
- }
-
- if (!port->cap->try_role) {
- dev_dbg(dev, "Setting preferred role not supported\n");
- return -EOPNOTSUPP;
- }
-
- role = sysfs_match_string(typec_roles, buf);
- if (role < 0) {
- if (sysfs_streq(buf, "none"))
- role = TYPEC_NO_PREFERRED_ROLE;
- else
- return -EINVAL;
- }
-
- ret = port->cap->try_role(port->cap, role);
- if (ret)
- return ret;
-
- port->prefer_role = role;
- return size;
-}
-
-static ssize_t
-preferred_role_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- if (port->cap->type != TYPEC_PORT_DRP)
- return 0;
-
- if (port->prefer_role < 0)
- return 0;
-
- return sprintf(buf, "%s\n", typec_roles[port->prefer_role]);
-}
-static DEVICE_ATTR_RW(preferred_role);
-
-static ssize_t data_role_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_port *port = to_typec_port(dev);
- int ret;
-
- if (!port->cap->dr_set) {
- dev_dbg(dev, "data role swapping not supported\n");
- return -EOPNOTSUPP;
- }
-
- ret = sysfs_match_string(typec_data_roles, buf);
- if (ret < 0)
- 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]);
- ret = -EOPNOTSUPP;
- goto unlock_and_ret;
- }
-
- ret = port->cap->dr_set(port->cap, ret);
- if (ret)
- goto unlock_and_ret;
-
- ret = size;
-unlock_and_ret:
- mutex_unlock(&port->port_type_lock);
- return ret;
-}
-
-static ssize_t data_role_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- if (port->cap->type == TYPEC_PORT_DRP)
- return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
- "[host] device" : "host [device]");
-
- return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]);
-}
-static DEVICE_ATTR_RW(data_role);
-
-static ssize_t power_role_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_port *port = to_typec_port(dev);
- int ret;
-
- if (!port->cap->pd_revision) {
- dev_dbg(dev, "USB Power Delivery not supported\n");
- return -EOPNOTSUPP;
- }
-
- if (!port->cap->pr_set) {
- dev_dbg(dev, "power role swapping not supported\n");
- return -EOPNOTSUPP;
- }
-
- if (port->pwr_opmode != TYPEC_PWR_MODE_PD) {
- dev_dbg(dev, "partner unable to swap power role\n");
- return -EIO;
- }
-
- ret = sysfs_match_string(typec_roles, buf);
- if (ret < 0)
- 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]);
- ret = -EOPNOTSUPP;
- goto unlock_and_ret;
- }
-
- ret = port->cap->pr_set(port->cap, ret);
- if (ret)
- goto unlock_and_ret;
-
- ret = size;
-unlock_and_ret:
- mutex_unlock(&port->port_type_lock);
- return ret;
-}
-
-static ssize_t power_role_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- if (port->cap->type == TYPEC_PORT_DRP)
- return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ?
- "[source] sink" : "source [sink]");
-
- return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]);
-}
-static DEVICE_ATTR_RW(power_role);
-
-static ssize_t
-port_type_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_port *port = to_typec_port(dev);
- int ret;
- enum typec_port_type type;
-
- if (!port->cap->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
- dev_dbg(dev, "changing port type not supported\n");
- return -EOPNOTSUPP;
- }
-
- ret = sysfs_match_string(typec_port_types, buf);
- if (ret < 0)
- return ret;
-
- type = ret;
- mutex_lock(&port->port_type_lock);
-
- if (port->port_type == type) {
- ret = size;
- goto unlock_and_ret;
- }
-
- ret = port->cap->port_type_set(port->cap, type);
- if (ret)
- goto unlock_and_ret;
-
- port->port_type = type;
- ret = size;
-
-unlock_and_ret:
- mutex_unlock(&port->port_type_lock);
- return ret;
-}
-
-static ssize_t
-port_type_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- if (port->cap->type == TYPEC_PORT_DRP)
- return sprintf(buf, "%s\n",
- typec_port_types_drp[port->port_type]);
-
- return sprintf(buf, "[%s]\n", typec_port_types[port->cap->type]);
-}
-static DEVICE_ATTR_RW(port_type);
-
-static const char * const typec_pwr_opmodes[] = {
- [TYPEC_PWR_MODE_USB] = "default",
- [TYPEC_PWR_MODE_1_5A] = "1.5A",
- [TYPEC_PWR_MODE_3_0A] = "3.0A",
- [TYPEC_PWR_MODE_PD] = "usb_power_delivery",
-};
-
-static ssize_t power_operation_mode_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]);
-}
-static DEVICE_ATTR_RO(power_operation_mode);
-
-static ssize_t vconn_source_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t size)
-{
- struct typec_port *port = to_typec_port(dev);
- bool source;
- int ret;
-
- if (!port->cap->pd_revision) {
- dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n");
- return -EOPNOTSUPP;
- }
-
- if (!port->cap->vconn_set) {
- dev_dbg(dev, "VCONN swapping not supported\n");
- return -EOPNOTSUPP;
- }
-
- ret = kstrtobool(buf, &source);
- if (ret)
- return ret;
-
- ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
- if (ret)
- return ret;
-
- return size;
-}
-
-static ssize_t vconn_source_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
-
- return sprintf(buf, "%s\n",
- port->vconn_role == TYPEC_SOURCE ? "yes" : "no");
-}
-static DEVICE_ATTR_RW(vconn_source);
-
-static ssize_t supported_accessory_modes_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
- ssize_t ret = 0;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) {
- if (port->cap->accessory[i])
- ret += sprintf(buf + ret, "%s ",
- typec_accessory_modes[port->cap->accessory[i]]);
- }
-
- if (!ret)
- return sprintf(buf, "none\n");
-
- buf[ret - 1] = '\n';
-
- return ret;
-}
-static DEVICE_ATTR_RO(supported_accessory_modes);
-
-static ssize_t usb_typec_revision_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *port = to_typec_port(dev);
- u16 rev = port->cap->revision;
-
- return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
-}
-static DEVICE_ATTR_RO(usb_typec_revision);
-
-static ssize_t usb_power_delivery_revision_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct typec_port *p = to_typec_port(dev);
-
- return sprintf(buf, "%d\n", (p->cap->pd_revision >> 8) & 0xff);
-}
-static DEVICE_ATTR_RO(usb_power_delivery_revision);
-
-static struct attribute *typec_attrs[] = {
- &dev_attr_data_role.attr,
- &dev_attr_power_operation_mode.attr,
- &dev_attr_power_role.attr,
- &dev_attr_preferred_role.attr,
- &dev_attr_supported_accessory_modes.attr,
- &dev_attr_usb_power_delivery_revision.attr,
- &dev_attr_usb_typec_revision.attr,
- &dev_attr_vconn_source.attr,
- &dev_attr_port_type.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(typec);
-
-static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- int ret;
-
- ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev));
- if (ret)
- dev_err(dev, "failed to add uevent TYPEC_PORT\n");
-
- return ret;
-}
-
-static void typec_release(struct device *dev)
-{
- struct typec_port *port = to_typec_port(dev);
-
- ida_simple_remove(&typec_index_ida, port->id);
- kfree(port);
-}
-
-static const struct device_type typec_port_dev_type = {
- .name = "typec_port",
- .groups = typec_groups,
- .uevent = typec_uevent,
- .release = typec_release,
-};
-
-/* --------------------------------------- */
-/* Driver callbacks to report role updates */
-
-/**
- * typec_set_data_role - Report data role change
- * @port: The USB Type-C Port where the role was changed
- * @role: The new data role
- *
- * This routine is used by the port drivers to report data role changes.
- */
-void typec_set_data_role(struct typec_port *port, enum typec_data_role role)
-{
- if (port->data_role == role)
- return;
-
- port->data_role = role;
- sysfs_notify(&port->dev.kobj, NULL, "data_role");
- kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
-}
-EXPORT_SYMBOL_GPL(typec_set_data_role);
-
-/**
- * typec_set_pwr_role - Report power role change
- * @port: The USB Type-C Port where the role was changed
- * @role: The new data role
- *
- * This routine is used by the port drivers to report power role changes.
- */
-void typec_set_pwr_role(struct typec_port *port, enum typec_role role)
-{
- if (port->pwr_role == role)
- return;
-
- port->pwr_role = role;
- sysfs_notify(&port->dev.kobj, NULL, "power_role");
- kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
-}
-EXPORT_SYMBOL_GPL(typec_set_pwr_role);
-
-/**
- * typec_set_pwr_role - Report VCONN source change
- * @port: The USB Type-C Port which VCONN role changed
- * @role: Source when @port is sourcing VCONN, or Sink when it's not
- *
- * This routine is used by the port drivers to report if the VCONN source is
- * changes.
- */
-void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
-{
- if (port->vconn_role == role)
- return;
-
- port->vconn_role = role;
- sysfs_notify(&port->dev.kobj, NULL, "vconn_source");
- kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
-}
-EXPORT_SYMBOL_GPL(typec_set_vconn_role);
-
-static int partner_match(struct device *dev, void *data)
-{
- return is_typec_partner(dev);
-}
-
-/**
- * typec_set_pwr_opmode - Report changed power operation mode
- * @port: The USB Type-C Port where the mode was changed
- * @opmode: New power operation mode
- *
- * This routine is used by the port drivers to report changed power operation
- * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB
- * Type-C specification, and "USB Power Delivery" when the power levels are
- * negotiated with methods defined in USB Power Delivery specification.
- */
-void typec_set_pwr_opmode(struct typec_port *port,
- enum typec_pwr_opmode opmode)
-{
- struct device *partner_dev;
-
- if (port->pwr_opmode == opmode)
- return;
-
- port->pwr_opmode = opmode;
- sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
- kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
-
- partner_dev = device_find_child(&port->dev, NULL, partner_match);
- if (partner_dev) {
- struct typec_partner *partner = to_typec_partner(partner_dev);
-
- if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
- partner->usb_pd = 1;
- sysfs_notify(&partner_dev->kobj, NULL,
- "supports_usb_power_delivery");
- }
- put_device(partner_dev);
- }
-}
-EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
-
-/* --------------------------------------- */
-
-/**
- * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
- * @port: USB Type-C Port that supports the alternate mode
- * @desc: Description of the alternate mode
- *
- * This routine is used to register an alternate mode that @port is capable of
- * supporting.
- *
- * Returns handle to the alternate mode on success or ERR_PTR on failure.
- */
-struct typec_altmode *
-typec_port_register_altmode(struct typec_port *port,
- const struct typec_altmode_desc *desc)
-{
- return typec_register_altmode(&port->dev, desc);
-}
-EXPORT_SYMBOL_GPL(typec_port_register_altmode);
-
-/**
- * typec_register_port - Register a USB Type-C Port
- * @parent: Parent device
- * @cap: Description of the port
- *
- * Registers a device for USB Type-C Port described in @cap.
- *
- * Returns handle to the port on success or ERR_PTR on failure.
- */
-struct typec_port *typec_register_port(struct device *parent,
- const struct typec_capability *cap)
-{
- struct typec_port *port;
- int role;
- int ret;
- int id;
-
- port = kzalloc(sizeof(*port), GFP_KERNEL);
- if (!port)
- return ERR_PTR(-ENOMEM);
-
- id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
- if (id < 0) {
- kfree(port);
- return ERR_PTR(id);
- }
-
- 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;
- port->pwr_role = TYPEC_SOURCE;
- port->vconn_role = TYPEC_SOURCE;
- } else {
- port->data_role = TYPEC_DEVICE;
- port->pwr_role = TYPEC_SINK;
- port->vconn_role = TYPEC_SINK;
- }
-
- port->id = id;
- port->cap = cap;
- port->port_type = cap->type;
- mutex_init(&port->port_type_lock);
- port->prefer_role = cap->prefer_role;
-
- port->dev.class = typec_class;
- port->dev.parent = parent;
- port->dev.fwnode = cap->fwnode;
- port->dev.type = &typec_port_dev_type;
- dev_set_name(&port->dev, "port%d", id);
-
- ret = device_register(&port->dev);
- if (ret) {
- dev_err(parent, "failed to register port (%d)\n", ret);
- put_device(&port->dev);
- return ERR_PTR(ret);
- }
-
- return port;
-}
-EXPORT_SYMBOL_GPL(typec_register_port);
-
-/**
- * typec_unregister_port - Unregister a USB Type-C Port
- * @port: The port to be unregistered
- *
- * Unregister device created with typec_register_port().
- */
-void typec_unregister_port(struct typec_port *port)
-{
- if (!IS_ERR_OR_NULL(port))
- device_unregister(&port->dev);
-}
-EXPORT_SYMBOL_GPL(typec_unregister_port);
-
-static int __init typec_init(void)
-{
- typec_class = class_create(THIS_MODULE, "typec");
- return PTR_ERR_OR_ZERO(typec_class);
-}
-subsys_initcall(typec_init);
-
-static void __exit typec_exit(void)
-{
- class_destroy(typec_class);
- ida_destroy(&typec_index_ida);
-}
-module_exit(typec_exit);
-
-MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("USB Type-C Connector Class");
#define TYPEC_MAX_ACCESSORY 3
+enum typec_orientation {
+ TYPEC_ORIENTATION_NONE,
+ TYPEC_ORIENTATION_NORMAL,
+ TYPEC_ORIENTATION_REVERSE,
+};
+
/*
* struct usb_pd_identity - USB Power Delivery identity data
* @id_header: ID Header VDO
* @pd_revision: USB Power Delivery Specification revision if supported
* @prefer_role: Initial role preference
* @accessory: Supported Accessory Modes
+ * @sw: Cable plug orientation switch
+ * @mux: Multiplexer switch for Alternate/Accessory Modes
* @fwnode: Optional fwnode of the port
* @try_role: Set data role preference for DRP port
* @dr_set: Set Data Role
int prefer_role;
enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
+ struct typec_switch *sw;
+ struct typec_mux *mux;
struct fwnode_handle *fwnode;
int (*try_role)(const struct typec_capability *,
void typec_set_vconn_role(struct typec_port *port, enum typec_role role);
void typec_set_pwr_opmode(struct typec_port *port, enum typec_pwr_opmode mode);
+int typec_set_orientation(struct typec_port *port,
+ enum typec_orientation orientation);
+int typec_set_mode(struct typec_port *port, int mode);
+
#endif /* __LINUX_USB_TYPEC_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+#ifndef __USB_TYPEC_MUX
+#define __USB_TYPEC_MUX
+
+#include <linux/list.h>
+#include <linux/usb/typec.h>
+
+struct device;
+
+/**
+ * struct typec_switch - USB Type-C cable orientation switch
+ * @dev: Switch device
+ * @entry: List entry
+ * @set: Callback to the driver for setting the orientation
+ *
+ * USB Type-C pin flipper switch routing the correct data pairs from the
+ * connector to the USB controller depending on the orientation of the cable
+ * plug.
+ */
+struct typec_switch {
+ struct device *dev;
+ struct list_head entry;
+
+ int (*set)(struct typec_switch *sw, enum typec_orientation orientation);
+};
+
+/**
+ * struct typec_switch - USB Type-C connector pin mux
+ * @dev: Mux device
+ * @entry: List entry
+ * @set: Callback to the driver for setting the state of the mux
+ *
+ * Pin Multiplexer/DeMultiplexer switch routing the USB Type-C connector pins to
+ * different components depending on the requested mode of operation. Used with
+ * Accessory/Alternate modes.
+ */
+struct typec_mux {
+ struct device *dev;
+ struct list_head entry;
+
+ int (*set)(struct typec_mux *mux, int state);
+};
+
+struct typec_switch *typec_switch_get(struct device *dev);
+void typec_switch_put(struct typec_switch *sw);
+int typec_switch_register(struct typec_switch *sw);
+void typec_switch_unregister(struct typec_switch *sw);
+
+struct typec_mux *typec_mux_get(struct device *dev);
+void typec_mux_put(struct typec_mux *mux);
+int typec_mux_register(struct typec_mux *mux);
+void typec_mux_unregister(struct typec_mux *mux);
+
+#endif /* __USB_TYPEC_MUX */
projects / openwrt / staging / blogic.git / commitdiff