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- // 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/property.h>
- #include <linux/slab.h>
- #include <linux/usb/pd_vdo.h>
- #include <linux/android_kabi.h>
- #include "bus.h"
- struct typec_plug {
- struct device dev;
- enum typec_plug_index index;
- struct ida mode_ids;
- int num_altmodes;
- ANDROID_KABI_RESERVE(1);
- };
- struct typec_cable {
- struct device dev;
- enum typec_plug_type type;
- struct usb_pd_identity *identity;
- unsigned int active:1;
- u16 pd_revision; /* 0300H = "3.0" */
- ANDROID_KABI_RESERVE(1);
- };
- struct typec_partner {
- struct device dev;
- unsigned int usb_pd:1;
- struct usb_pd_identity *identity;
- enum typec_accessory accessory;
- struct ida mode_ids;
- int num_altmodes;
- u16 pd_revision; /* 0300H = "3.0" */
- enum usb_pd_svdm_ver svdm_version;
- ANDROID_KABI_RESERVE(1);
- };
- struct typec_port {
- unsigned int id;
- struct device dev;
- struct ida mode_ids;
- 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;
- const struct typec_operations *ops;
- ANDROID_KABI_RESERVE(1);
- };
- #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)
- 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;
- #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)
- 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",
- };
- /* Product types defined in USB PD Specification R3.0 V2.0 */
- static const char * const product_type_ufp[8] = {
- [IDH_PTYPE_NOT_UFP] = "not_ufp",
- [IDH_PTYPE_HUB] = "hub",
- [IDH_PTYPE_PERIPH] = "peripheral",
- [IDH_PTYPE_PSD] = "psd",
- [IDH_PTYPE_AMA] = "ama",
- };
- static const char * const product_type_dfp[8] = {
- [IDH_PTYPE_NOT_DFP] = "not_dfp",
- [IDH_PTYPE_DFP_HUB] = "hub",
- [IDH_PTYPE_DFP_HOST] = "host",
- [IDH_PTYPE_DFP_PB] = "power_brick",
- };
- static const char * const product_type_cable[8] = {
- [IDH_PTYPE_NOT_CABLE] = "not_cable",
- [IDH_PTYPE_PCABLE] = "passive",
- [IDH_PTYPE_ACABLE] = "active",
- [IDH_PTYPE_VPD] = "vpd",
- };
- 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 const char *get_pd_product_type(struct device *dev)
- {
- struct typec_port *port = to_typec_port(dev->parent);
- struct usb_pd_identity *id = get_pd_identity(dev);
- const char *ptype = NULL;
- if (is_typec_partner(dev)) {
- if (!id)
- return NULL;
- if (port->data_role == TYPEC_HOST)
- ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)];
- else
- ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)];
- } else if (is_typec_cable(dev)) {
- if (id)
- ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)];
- else
- ptype = to_typec_cable(dev)->active ?
- product_type_cable[IDH_PTYPE_ACABLE] :
- product_type_cable[IDH_PTYPE_PCABLE];
- }
- return ptype;
- }
- 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 ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct usb_pd_identity *id = get_pd_identity(dev);
- return sysfs_emit(buf, "0x%08x\n", id->vdo[0]);
- }
- static DEVICE_ATTR_RO(product_type_vdo1);
- static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct usb_pd_identity *id = get_pd_identity(dev);
- return sysfs_emit(buf, "0x%08x\n", id->vdo[1]);
- }
- static DEVICE_ATTR_RO(product_type_vdo2);
- static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct usb_pd_identity *id = get_pd_identity(dev);
- return sysfs_emit(buf, "0x%08x\n", id->vdo[2]);
- }
- static DEVICE_ATTR_RO(product_type_vdo3);
- static struct attribute *usb_pd_id_attrs[] = {
- &dev_attr_id_header.attr,
- &dev_attr_cert_stat.attr,
- &dev_attr_product.attr,
- &dev_attr_product_type_vdo1.attr,
- &dev_attr_product_type_vdo2.attr,
- &dev_attr_product_type_vdo3.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_product_type_notify(struct device *dev)
- {
- char *envp[2] = { };
- const char *ptype;
- ptype = get_pd_product_type(dev);
- if (!ptype)
- return;
- sysfs_notify(&dev->kobj, NULL, "type");
- envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype);
- if (!envp[0])
- return;
- kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
- kfree(envp[0]);
- }
- 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");
- sysfs_notify(&dev->kobj, "identity", "product_type_vdo1");
- sysfs_notify(&dev->kobj, "identity", "product_type_vdo2");
- sysfs_notify(&dev->kobj, "identity", "product_type_vdo3");
- typec_product_type_notify(dev);
- }
- static ssize_t
- type_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- const char *ptype;
- ptype = get_pd_product_type(dev);
- if (!ptype)
- return 0;
- return sysfs_emit(buf, "%s\n", ptype);
- }
- static DEVICE_ATTR_RO(type);
- static ssize_t usb_power_delivery_revision_show(struct device *dev,
- struct device_attribute *attr,
- char *buf);
- static DEVICE_ATTR_RO(usb_power_delivery_revision);
- /* ------------------------------------------------------------------------- */
- /* Alternate Modes */
- static int altmode_match(struct device *dev, void *data)
- {
- struct typec_altmode *adev = to_typec_altmode(dev);
- struct typec_device_id *id = data;
- if (!is_typec_altmode(dev))
- return 0;
- return ((adev->svid == id->svid) && (adev->mode == id->mode));
- }
- static void typec_altmode_set_partner(struct altmode *altmode)
- {
- struct typec_altmode *adev = &altmode->adev;
- struct typec_device_id id = { adev->svid, adev->mode, };
- struct typec_port *port = typec_altmode2port(adev);
- struct altmode *partner;
- struct device *dev;
- dev = device_find_child(&port->dev, &id, altmode_match);
- if (!dev)
- return;
- /* Bind the port alt mode to the partner/plug alt mode. */
- partner = to_altmode(to_typec_altmode(dev));
- altmode->partner = partner;
- /* Bind the partner/plug alt mode to the port alt mode. */
- if (is_typec_plug(adev->dev.parent)) {
- struct typec_plug *plug = to_typec_plug(adev->dev.parent);
- partner->plug[plug->index] = altmode;
- } else {
- partner->partner = altmode;
- }
- }
- static void typec_altmode_put_partner(struct altmode *altmode)
- {
- struct altmode *partner = altmode->partner;
- struct typec_altmode *adev;
- if (!partner)
- return;
- adev = &partner->adev;
- if (is_typec_plug(adev->dev.parent)) {
- struct typec_plug *plug = to_typec_plug(adev->dev.parent);
- partner->plug[plug->index] = NULL;
- } else {
- partner->partner = NULL;
- }
- put_device(&adev->dev);
- }
- /**
- * typec_altmode_update_active - Report Enter/Exit mode
- * @adev: Handle to the alternate mode
- * @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 *adev, bool active)
- {
- char dir[6];
- if (adev->active == active)
- return;
- if (!is_typec_port(adev->dev.parent) && adev->dev.driver) {
- if (!active)
- module_put(adev->dev.driver->owner);
- else
- WARN_ON(!try_module_get(adev->dev.driver->owner));
- }
- adev->active = active;
- snprintf(dir, sizeof(dir), "mode%d", adev->mode);
- sysfs_notify(&adev->dev.kobj, dir, "active");
- sysfs_notify(&adev->dev.kobj, NULL, "active");
- kobject_uevent(&adev->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
- vdo_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct typec_altmode *alt = to_typec_altmode(dev);
- return sprintf(buf, "0x%08x\n", alt->vdo);
- }
- static DEVICE_ATTR_RO(vdo);
- static ssize_t
- description_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct typec_altmode *alt = to_typec_altmode(dev);
- return sprintf(buf, "%s\n", alt->desc ? alt->desc : "");
- }
- static DEVICE_ATTR_RO(description);
- static ssize_t
- active_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct typec_altmode *alt = to_typec_altmode(dev);
- return sprintf(buf, "%s\n", alt->active ? "yes" : "no");
- }
- static ssize_t active_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t size)
- {
- struct typec_altmode *adev = to_typec_altmode(dev);
- struct altmode *altmode = to_altmode(adev);
- bool enter;
- int ret;
- ret = kstrtobool(buf, &enter);
- if (ret)
- return ret;
- if (adev->active == enter)
- return size;
- if (is_typec_port(adev->dev.parent)) {
- typec_altmode_update_active(adev, enter);
- /* Make sure that the partner exits the mode before disabling */
- if (altmode->partner && !enter && altmode->partner->adev.active)
- typec_altmode_exit(&altmode->partner->adev);
- } else if (altmode->partner) {
- if (enter && !altmode->partner->adev.active) {
- dev_warn(dev, "port has the mode disabled\n");
- return -EPERM;
- }
- }
- /* Note: If there is no driver, the mode will not be entered */
- if (adev->ops && adev->ops->activate) {
- ret = adev->ops->activate(adev, enter);
- if (ret)
- return ret;
- }
- return size;
- }
- static DEVICE_ATTR_RW(active);
- static ssize_t
- supported_roles_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct altmode *alt = to_altmode(to_typec_altmode(dev));
- ssize_t ret;
- switch (alt->roles) {
- case TYPEC_PORT_SRC:
- ret = sprintf(buf, "source\n");
- break;
- case TYPEC_PORT_SNK:
- ret = sprintf(buf, "sink\n");
- break;
- case TYPEC_PORT_DRP:
- default:
- ret = sprintf(buf, "source sink\n");
- break;
- }
- return ret;
- }
- static DEVICE_ATTR_RO(supported_roles);
- static ssize_t
- mode_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct typec_altmode *adev = to_typec_altmode(dev);
- return sprintf(buf, "%u\n", adev->mode);
- }
- static DEVICE_ATTR_RO(mode);
- static ssize_t
- svid_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct typec_altmode *adev = to_typec_altmode(dev);
- return sprintf(buf, "%04x\n", adev->svid);
- }
- static DEVICE_ATTR_RO(svid);
- static struct attribute *typec_altmode_attrs[] = {
- &dev_attr_active.attr,
- &dev_attr_mode.attr,
- &dev_attr_svid.attr,
- &dev_attr_vdo.attr,
- NULL
- };
- static umode_t typec_altmode_attr_is_visible(struct kobject *kobj,
- struct attribute *attr, int n)
- {
- struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj));
- if (attr == &dev_attr_active.attr)
- if (!adev->ops || !adev->ops->activate)
- return 0444;
- return attr->mode;
- }
- static const struct attribute_group typec_altmode_group = {
- .is_visible = typec_altmode_attr_is_visible,
- .attrs = typec_altmode_attrs,
- };
- static const struct attribute_group *typec_altmode_groups[] = {
- &typec_altmode_group,
- NULL
- };
- static int altmode_id_get(struct device *dev)
- {
- struct ida *ids;
- if (is_typec_partner(dev))
- ids = &to_typec_partner(dev)->mode_ids;
- else if (is_typec_plug(dev))
- ids = &to_typec_plug(dev)->mode_ids;
- else
- ids = &to_typec_port(dev)->mode_ids;
- return ida_simple_get(ids, 0, 0, GFP_KERNEL);
- }
- static void altmode_id_remove(struct device *dev, int id)
- {
- struct ida *ids;
- if (is_typec_partner(dev))
- ids = &to_typec_partner(dev)->mode_ids;
- else if (is_typec_plug(dev))
- ids = &to_typec_plug(dev)->mode_ids;
- else
- ids = &to_typec_port(dev)->mode_ids;
- ida_simple_remove(ids, id);
- }
- static void typec_altmode_release(struct device *dev)
- {
- struct altmode *alt = to_altmode(to_typec_altmode(dev));
- typec_altmode_put_partner(alt);
- altmode_id_remove(alt->adev.dev.parent, alt->id);
- kfree(alt);
- }
- 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)
- {
- unsigned int id = altmode_id_get(parent);
- bool is_port = is_typec_port(parent);
- struct altmode *alt;
- int ret;
- alt = kzalloc(sizeof(*alt), GFP_KERNEL);
- if (!alt) {
- altmode_id_remove(parent, id);
- return ERR_PTR(-ENOMEM);
- }
- alt->adev.svid = desc->svid;
- alt->adev.mode = desc->mode;
- alt->adev.vdo = desc->vdo;
- alt->roles = desc->roles;
- alt->id = id;
- alt->attrs[0] = &dev_attr_vdo.attr;
- alt->attrs[1] = &dev_attr_description.attr;
- alt->attrs[2] = &dev_attr_active.attr;
- if (is_port) {
- alt->attrs[3] = &dev_attr_supported_roles.attr;
- alt->adev.active = true; /* Enabled by default */
- }
- sprintf(alt->group_name, "mode%d", desc->mode);
- alt->group.name = alt->group_name;
- alt->group.attrs = alt->attrs;
- alt->groups[0] = &alt->group;
- alt->adev.dev.parent = parent;
- alt->adev.dev.groups = alt->groups;
- alt->adev.dev.type = &typec_altmode_dev_type;
- dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id);
- /* Link partners and plugs with the ports */
- if (!is_port)
- typec_altmode_set_partner(alt);
- /* The partners are bind to drivers */
- if (is_typec_partner(parent))
- alt->adev.dev.bus = &typec_bus;
- /* Plug alt modes need a class to generate udev events. */
- if (is_typec_plug(parent))
- alt->adev.dev.class = typec_class;
- ret = device_register(&alt->adev.dev);
- if (ret) {
- dev_err(parent, "failed to register alternate mode (%d)\n",
- ret);
- put_device(&alt->adev.dev);
- return ERR_PTR(ret);
- }
- return &alt->adev;
- }
- /**
- * typec_unregister_altmode - Unregister Alternate Mode
- * @adev: 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 *adev)
- {
- if (IS_ERR_OR_NULL(adev))
- return;
- typec_mux_put(to_altmode(adev)->mux);
- device_unregister(&adev->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 ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct typec_partner *partner;
- struct typec_plug *plug;
- int num_altmodes;
- if (is_typec_partner(dev)) {
- partner = to_typec_partner(dev);
- num_altmodes = partner->num_altmodes;
- } else if (is_typec_plug(dev)) {
- plug = to_typec_plug(dev);
- num_altmodes = plug->num_altmodes;
- } else {
- return 0;
- }
- return sysfs_emit(buf, "%d\n", num_altmodes);
- }
- static DEVICE_ATTR_RO(number_of_alternate_modes);
- static struct attribute *typec_partner_attrs[] = {
- &dev_attr_accessory_mode.attr,
- &dev_attr_supports_usb_power_delivery.attr,
- &dev_attr_number_of_alternate_modes.attr,
- &dev_attr_type.attr,
- &dev_attr_usb_power_delivery_revision.attr,
- NULL
- };
- static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
- {
- struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj));
- if (attr == &dev_attr_number_of_alternate_modes.attr) {
- if (partner->num_altmodes < 0)
- return 0;
- }
- if (attr == &dev_attr_type.attr)
- if (!get_pd_product_type(kobj_to_dev(kobj)))
- return 0;
- return attr->mode;
- }
- static const struct attribute_group typec_partner_group = {
- .is_visible = typec_partner_attr_is_visible,
- .attrs = typec_partner_attrs
- };
- static const struct attribute_group *typec_partner_groups[] = {
- &typec_partner_group,
- NULL
- };
- static void typec_partner_release(struct device *dev)
- {
- struct typec_partner *partner = to_typec_partner(dev);
- ida_destroy(&partner->mode_ids);
- 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_set_pd_revision - Set the PD revision supported by the partner
- * @partner: The partner to be updated.
- * @pd_revision: USB Power Delivery Specification Revision supported by partner
- *
- * This routine is used to report that the PD revision of the port partner has
- * become available.
- */
- void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision)
- {
- if (partner->pd_revision == pd_revision)
- return;
- partner->pd_revision = pd_revision;
- sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision");
- if (pd_revision != 0 && !partner->usb_pd) {
- partner->usb_pd = 1;
- sysfs_notify(&partner->dev.kobj, NULL,
- "supports_usb_power_delivery");
- }
- kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE);
- }
- EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision);
- /**
- * typec_partner_set_num_altmodes - Set the number of available partner altmodes
- * @partner: The partner to be updated.
- * @num_altmodes: The number of altmodes we want to specify as available.
- *
- * This routine is used to report the number of alternate modes supported by the
- * partner. This value is *not* enforced in alternate mode registration routines.
- *
- * @partner.num_altmodes is set to -1 on partner registration, denoting that
- * a valid value has not been set for it yet.
- *
- * Returns 0 on success or negative error number on failure.
- */
- int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes)
- {
- int ret;
- if (num_altmodes < 0)
- return -EINVAL;
- partner->num_altmodes = num_altmodes;
- ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group);
- if (ret < 0)
- return ret;
- sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes");
- return 0;
- }
- EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes);
- /**
- * 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 ERR_PTR 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_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version
- * @partner: USB Type-C Partner that supports SVDM
- * @svdm_version: Negotiated SVDM Version
- *
- * This routine is used to save the negotiated SVDM Version.
- */
- void typec_partner_set_svdm_version(struct typec_partner *partner,
- enum usb_pd_svdm_ver svdm_version)
- {
- partner->svdm_version = svdm_version;
- }
- EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version);
- /**
- * 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);
- ida_init(&partner->mode_ids);
- partner->usb_pd = desc->usb_pd;
- partner->accessory = desc->accessory;
- partner->num_altmodes = -1;
- partner->pd_revision = desc->pd_revision;
- partner->svdm_version = port->cap->svdm_version;
- 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);
- ida_destroy(&plug->mode_ids);
- kfree(plug);
- }
- static struct attribute *typec_plug_attrs[] = {
- &dev_attr_number_of_alternate_modes.attr,
- NULL
- };
- static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
- {
- struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj));
- if (attr == &dev_attr_number_of_alternate_modes.attr) {
- if (plug->num_altmodes < 0)
- return 0;
- }
- return attr->mode;
- }
- static const struct attribute_group typec_plug_group = {
- .is_visible = typec_plug_attr_is_visible,
- .attrs = typec_plug_attrs
- };
- static const struct attribute_group *typec_plug_groups[] = {
- &typec_plug_group,
- NULL
- };
- static const struct device_type typec_plug_dev_type = {
- .name = "typec_plug",
- .groups = typec_plug_groups,
- .release = typec_plug_release,
- };
- /**
- * typec_plug_set_num_altmodes - Set the number of available plug altmodes
- * @plug: The plug to be updated.
- * @num_altmodes: The number of altmodes we want to specify as available.
- *
- * This routine is used to report the number of alternate modes supported by the
- * plug. This value is *not* enforced in alternate mode registration routines.
- *
- * @plug.num_altmodes is set to -1 on plug registration, denoting that
- * a valid value has not been set for it yet.
- *
- * Returns 0 on success or negative error number on failure.
- */
- int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes)
- {
- int ret;
- if (num_altmodes < 0)
- return -EINVAL;
- plug->num_altmodes = num_altmodes;
- ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group);
- if (ret < 0)
- return ret;
- sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes");
- return 0;
- }
- EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes);
- /**
- * 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);
- ida_init(&plug->mode_ids);
- plug->num_altmodes = -1;
- 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 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,
- &dev_attr_usb_power_delivery_revision.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,
- };
- static int cable_match(struct device *dev, void *data)
- {
- return is_typec_cable(dev);
- }
- /**
- * typec_cable_get - Get a reference to the USB Type-C cable
- * @port: The USB Type-C Port the cable is connected to
- *
- * The caller must decrement the reference count with typec_cable_put() after
- * use.
- */
- struct typec_cable *typec_cable_get(struct typec_port *port)
- {
- struct device *dev;
- dev = device_find_child(&port->dev, NULL, cable_match);
- if (!dev)
- return NULL;
- return to_typec_cable(dev);
- }
- EXPORT_SYMBOL_GPL(typec_cable_get);
- /**
- * typec_cable_put - Decrement the reference count on USB Type-C cable
- * @cable: The USB Type-C cable
- */
- void typec_cable_put(struct typec_cable *cable)
- {
- put_device(&cable->dev);
- }
- EXPORT_SYMBOL_GPL(typec_cable_put);
- /**
- * typec_cable_is_active - Check is the USB Type-C cable active or passive
- * @cable: The USB Type-C Cable
- *
- * Return 1 if the cable is active or 0 if it's passive.
- */
- int typec_cable_is_active(struct typec_cable *cable)
- {
- return cable->active;
- }
- EXPORT_SYMBOL_GPL(typec_cable_is_active);
- /**
- * 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;
- cable->pd_revision = desc->pd_revision;
- 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_orientations[] = {
- [TYPEC_ORIENTATION_NONE] = "unknown",
- [TYPEC_ORIENTATION_NORMAL] = "normal",
- [TYPEC_ORIENTATION_REVERSE] = "reverse",
- };
- 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_power_roles[] = {
- [TYPEC_PORT_SRC] = "source",
- [TYPEC_PORT_SNK] = "sink",
- [TYPEC_PORT_DRP] = "dual",
- };
- static const char * const typec_port_data_roles[] = {
- [TYPEC_PORT_DFP] = "host",
- [TYPEC_PORT_UFP] = "device",
- [TYPEC_PORT_DRD] = "dual",
- };
- static const char * const typec_port_types_drp[] = {
- [TYPEC_PORT_SRC] = "dual [source] sink",
- [TYPEC_PORT_SNK] = "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->ops || !port->ops->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->ops->try_role(port, 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->ops || !port->ops->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->cap->data != TYPEC_PORT_DRD) {
- ret = -EOPNOTSUPP;
- goto unlock_and_ret;
- }
- ret = port->ops->dr_set(port, 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->data == TYPEC_PORT_DRD)
- 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->ops || !port->ops->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_power_roles[port->port_type]);
- ret = -EOPNOTSUPP;
- goto unlock_and_ret;
- }
- ret = port->ops->pr_set(port, 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->type != TYPEC_PORT_DRP ||
- !port->ops || !port->ops->port_type_set) {
- dev_dbg(dev, "changing port type not supported\n");
- return -EOPNOTSUPP;
- }
- ret = sysfs_match_string(typec_port_power_roles, 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->ops->port_type_set(port, 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_power_roles[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->ops || !port->ops->vconn_set) {
- dev_dbg(dev, "VCONN swapping not supported\n");
- return -EOPNOTSUPP;
- }
- ret = kstrtobool(buf, &source);
- if (ret)
- return ret;
- ret = port->ops->vconn_set(port, (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)
- {
- u16 rev = 0;
- if (is_typec_partner(dev)) {
- struct typec_partner *partner = to_typec_partner(dev);
- rev = partner->pd_revision;
- } else if (is_typec_cable(dev)) {
- struct typec_cable *cable = to_typec_cable(dev);
- rev = cable->pd_revision;
- } else if (is_typec_port(dev)) {
- struct typec_port *p = to_typec_port(dev);
- rev = p->cap->pd_revision;
- }
- return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
- }
- static ssize_t orientation_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
- {
- struct typec_port *port = to_typec_port(dev);
- return sprintf(buf, "%s\n", typec_orientations[port->orientation]);
- }
- static DEVICE_ATTR_RO(orientation);
- 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,
- &dev_attr_orientation.attr,
- NULL,
- };
- static umode_t typec_attr_is_visible(struct kobject *kobj,
- struct attribute *attr, int n)
- {
- struct typec_port *port = to_typec_port(kobj_to_dev(kobj));
- if (attr == &dev_attr_data_role.attr) {
- if (port->cap->data != TYPEC_PORT_DRD ||
- !port->ops || !port->ops->dr_set)
- return 0444;
- } else if (attr == &dev_attr_power_role.attr) {
- if (port->cap->type != TYPEC_PORT_DRP ||
- !port->ops || !port->ops->pr_set)
- return 0444;
- } else if (attr == &dev_attr_vconn_source.attr) {
- if (!port->cap->pd_revision ||
- !port->ops || !port->ops->vconn_set)
- return 0444;
- } else if (attr == &dev_attr_preferred_role.attr) {
- if (port->cap->type != TYPEC_PORT_DRP ||
- !port->ops || !port->ops->try_role)
- return 0444;
- } else if (attr == &dev_attr_port_type.attr) {
- if (!port->ops || !port->ops->port_type_set)
- return 0;
- if (port->cap->type != TYPEC_PORT_DRP)
- return 0444;
- } else if (attr == &dev_attr_orientation.attr) {
- if (port->cap->orientation_aware)
- return 0444;
- return 0;
- }
- return attr->mode;
- }
- static const struct attribute_group typec_group = {
- .is_visible = typec_attr_is_visible,
- .attrs = typec_attrs,
- };
- static const struct attribute_group *typec_groups[] = {
- &typec_group,
- NULL
- };
- 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);
- ida_destroy(&port->mode_ids);
- typec_switch_put(port->sw);
- typec_mux_put(port->mux);
- kfree(port->cap);
- kfree(port);
- }
- 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 */
- static int partner_match(struct device *dev, void *data)
- {
- return is_typec_partner(dev);
- }
- /**
- * 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)
- {
- struct device *partner_dev;
- 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);
- partner_dev = device_find_child(&port->dev, NULL, partner_match);
- if (!partner_dev)
- return;
- if (to_typec_partner(partner_dev)->identity)
- typec_product_type_notify(partner_dev);
- put_device(partner_dev);
- }
- 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_vconn_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);
- /**
- * 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_find_pwr_opmode - Get the typec power operation mode capability
- * @name: power operation mode string
- *
- * This routine is used to find the typec_pwr_opmode by its string @name.
- *
- * Returns typec_pwr_opmode if success, otherwise negative error code.
- */
- int typec_find_pwr_opmode(const char *name)
- {
- return match_string(typec_pwr_opmodes,
- ARRAY_SIZE(typec_pwr_opmodes), name);
- }
- EXPORT_SYMBOL_GPL(typec_find_pwr_opmode);
- /**
- * typec_find_orientation - Convert orientation string to enum typec_orientation
- * @name: Orientation string
- *
- * This routine is used to find the typec_orientation by its string name @name.
- *
- * Returns the orientation value on success, otherwise negative error code.
- */
- int typec_find_orientation(const char *name)
- {
- return match_string(typec_orientations, ARRAY_SIZE(typec_orientations),
- name);
- }
- EXPORT_SYMBOL_GPL(typec_find_orientation);
- /**
- * typec_find_port_power_role - Get the typec port power capability
- * @name: port power capability string
- *
- * This routine is used to find the typec_port_type by its string name.
- *
- * Returns typec_port_type if success, otherwise negative error code.
- */
- int typec_find_port_power_role(const char *name)
- {
- return match_string(typec_port_power_roles,
- ARRAY_SIZE(typec_port_power_roles), name);
- }
- EXPORT_SYMBOL_GPL(typec_find_port_power_role);
- /**
- * typec_find_power_role - Find the typec one specific power role
- * @name: power role string
- *
- * This routine is used to find the typec_role by its string name.
- *
- * Returns typec_role if success, otherwise negative error code.
- */
- int typec_find_power_role(const char *name)
- {
- return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
- }
- EXPORT_SYMBOL_GPL(typec_find_power_role);
- /**
- * typec_find_port_data_role - Get the typec port data capability
- * @name: port data capability string
- *
- * This routine is used to find the typec_port_data by its string name.
- *
- * Returns typec_port_data if success, otherwise negative error code.
- */
- int typec_find_port_data_role(const char *name)
- {
- return match_string(typec_port_data_roles,
- ARRAY_SIZE(typec_port_data_roles), name);
- }
- EXPORT_SYMBOL_GPL(typec_find_port_data_role);
- /* ------------------------------------------ */
- /* 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;
- ret = typec_switch_set(port->sw, orientation);
- if (ret)
- return ret;
- port->orientation = orientation;
- sysfs_notify(&port->dev.kobj, NULL, "orientation");
- kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
- return 0;
- }
- EXPORT_SYMBOL_GPL(typec_set_orientation);
- /**
- * typec_get_orientation - Get USB Type-C cable plug orientation
- * @port: USB Type-C Port
- *
- * Get current cable plug orientation for @port.
- */
- enum typec_orientation typec_get_orientation(struct typec_port *port)
- {
- return port->orientation;
- }
- EXPORT_SYMBOL_GPL(typec_get_orientation);
- /**
- * typec_set_mode - Set mode of operation for USB Type-C connector
- * @port: USB Type-C connector
- * @mode: Accessory Mode, USB Operation or Safe State
- *
- * Configure @port for Accessory Mode @mode. This function will configure the
- * muxes needed for @mode.
- */
- int typec_set_mode(struct typec_port *port, int mode)
- {
- struct typec_mux_state state = { };
- state.mode = mode;
- return typec_mux_set(port->mux, &state);
- }
- EXPORT_SYMBOL_GPL(typec_set_mode);
- /* --------------------------------------- */
- /**
- * typec_get_negotiated_svdm_version - Get negotiated SVDM Version
- * @port: USB Type-C Port.
- *
- * Get the negotiated SVDM Version. The Version is set to the port default
- * value stored in typec_capability on partner registration, and updated after
- * a successful Discover Identity if the negotiated value is less than the
- * default value.
- *
- * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV.
- */
- int typec_get_negotiated_svdm_version(struct typec_port *port)
- {
- enum usb_pd_svdm_ver svdm_version;
- struct device *partner_dev;
- partner_dev = device_find_child(&port->dev, NULL, partner_match);
- if (!partner_dev)
- return -ENODEV;
- svdm_version = to_typec_partner(partner_dev)->svdm_version;
- put_device(partner_dev);
- return svdm_version;
- }
- EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version);
- /**
- * typec_get_drvdata - Return private driver data pointer
- * @port: USB Type-C port
- */
- void *typec_get_drvdata(struct typec_port *port)
- {
- return dev_get_drvdata(&port->dev);
- }
- EXPORT_SYMBOL_GPL(typec_get_drvdata);
- /**
- * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
- * @port: USB Type-C Port that supports the alternate mode
- * @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)
- {
- struct typec_altmode *adev;
- struct typec_mux *mux;
- mux = typec_mux_get(&port->dev, desc);
- if (IS_ERR(mux))
- return ERR_CAST(mux);
- adev = typec_register_altmode(&port->dev, desc);
- if (IS_ERR(adev))
- typec_mux_put(mux);
- else
- to_altmode(adev)->mux = mux;
- return adev;
- }
- 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 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);
- }
- switch (cap->type) {
- case TYPEC_PORT_SRC:
- port->pwr_role = TYPEC_SOURCE;
- port->vconn_role = TYPEC_SOURCE;
- break;
- case TYPEC_PORT_SNK:
- port->pwr_role = TYPEC_SINK;
- port->vconn_role = TYPEC_SINK;
- break;
- case TYPEC_PORT_DRP:
- if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE)
- port->pwr_role = cap->prefer_role;
- else
- port->pwr_role = TYPEC_SINK;
- break;
- }
- switch (cap->data) {
- case TYPEC_PORT_DFP:
- port->data_role = TYPEC_HOST;
- break;
- case TYPEC_PORT_UFP:
- port->data_role = TYPEC_DEVICE;
- break;
- case TYPEC_PORT_DRD:
- if (cap->prefer_role == TYPEC_SOURCE)
- port->data_role = TYPEC_HOST;
- else
- port->data_role = TYPEC_DEVICE;
- break;
- }
- ida_init(&port->mode_ids);
- mutex_init(&port->port_type_lock);
- port->id = id;
- port->ops = cap->ops;
- port->port_type = cap->type;
- port->prefer_role = cap->prefer_role;
- device_initialize(&port->dev);
- 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);
- dev_set_drvdata(&port->dev, cap->driver_data);
- port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
- if (!port->cap) {
- put_device(&port->dev);
- return ERR_PTR(-ENOMEM);
- }
- port->sw = typec_switch_get(&port->dev);
- if (IS_ERR(port->sw)) {
- ret = PTR_ERR(port->sw);
- put_device(&port->dev);
- return ERR_PTR(ret);
- }
- port->mux = typec_mux_get(&port->dev, NULL);
- if (IS_ERR(port->mux)) {
- ret = PTR_ERR(port->mux);
- put_device(&port->dev);
- return ERR_PTR(ret);
- }
- ret = device_add(&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)
- {
- int ret;
- ret = bus_register(&typec_bus);
- if (ret)
- return ret;
- ret = class_register(&typec_mux_class);
- if (ret)
- goto err_unregister_bus;
- typec_class = class_create(THIS_MODULE, "typec");
- if (IS_ERR(typec_class)) {
- ret = PTR_ERR(typec_class);
- goto err_unregister_mux_class;
- }
- return 0;
- err_unregister_mux_class:
- class_unregister(&typec_mux_class);
- err_unregister_bus:
- bus_unregister(&typec_bus);
- return ret;
- }
- subsys_initcall(typec_init);
- static void __exit typec_exit(void)
- {
- class_destroy(typec_class);
- ida_destroy(&typec_index_ida);
- bus_unregister(&typec_bus);
- class_unregister(&typec_mux_class);
- }
- module_exit(typec_exit);
- MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
- MODULE_LICENSE("GPL v2");
- MODULE_DESCRIPTION("USB Type-C Connector Class");
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