| // 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/module.h> |
| #include <linux/mutex.h> |
| #include <linux/property.h> |
| #include <linux/slab.h> |
| #include <linux/usb/pd_vdo.h> |
| #include <linux/usb/typec_mux.h> |
| #include <linux/usb/typec_retimer.h> |
| |
| #include "bus.h" |
| #include "class.h" |
| #include "pd.h" |
| |
| static DEFINE_IDA(typec_index_ida); |
| |
| struct class typec_class = { |
| .name = "typec", |
| .owner = THIS_MODULE, |
| }; |
| |
| /* ------------------------------------------------------------------------- */ |
| /* 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); |
| } |
| |
| 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_usb_power_delivery - Declare USB Power Delivery Contract. |
| * @partner: The partner device. |
| * @pd: The USB PD instance. |
| * |
| * This routine can be used to declare USB Power Delivery Contract with @partner |
| * by linking @partner to @pd which contains the objects that were used during the |
| * negotiation of the contract. |
| * |
| * If @pd is NULL, the link is removed and the contract with @partner has ended. |
| */ |
| int typec_partner_set_usb_power_delivery(struct typec_partner *partner, |
| struct usb_power_delivery *pd) |
| { |
| int ret; |
| |
| if (IS_ERR_OR_NULL(partner) || partner->pd == pd) |
| return 0; |
| |
| if (pd) { |
| ret = usb_power_delivery_link_device(pd, &partner->dev); |
| if (ret) |
| return ret; |
| } else { |
| usb_power_delivery_unlink_device(partner->pd, &partner->dev); |
| } |
| |
| partner->pd = pd; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(typec_partner_set_usb_power_delivery); |
| |
| /** |
| * 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"); |
| kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); |
| |
| 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 |
| }; |
| |
| 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"); |
| kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE); |
| |
| 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); |
| } |
| |
| 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 */ |
| |
| /** |
| * typec_port_set_usb_power_delivery - Assign USB PD for port. |
| * @port: USB Type-C port. |
| * @pd: USB PD instance. |
| * |
| * This routine can be used to set the USB Power Delivery Capabilities for @port |
| * that it will advertise to the partner. |
| * |
| * If @pd is NULL, the assignment is removed. |
| */ |
| int typec_port_set_usb_power_delivery(struct typec_port *port, struct usb_power_delivery *pd) |
| { |
| int ret; |
| |
| if (IS_ERR_OR_NULL(port) || port->pd == pd) |
| return 0; |
| |
| if (pd) { |
| ret = usb_power_delivery_link_device(pd, &port->dev); |
| if (ret) |
| return ret; |
| } else { |
| usb_power_delivery_unlink_device(port->pd, &port->dev); |
| } |
| |
| port->pd = pd; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(typec_port_set_usb_power_delivery); |
| |
| static ssize_t select_usb_power_delivery_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct typec_port *port = to_typec_port(dev); |
| struct usb_power_delivery *pd; |
| |
| if (!port->ops || !port->ops->pd_set) |
| return -EOPNOTSUPP; |
| |
| pd = usb_power_delivery_find(buf); |
| if (!pd) |
| return -EINVAL; |
| |
| return port->ops->pd_set(port, pd); |
| } |
| |
| static ssize_t select_usb_power_delivery_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct typec_port *port = to_typec_port(dev); |
| struct usb_power_delivery **pds; |
| struct usb_power_delivery *pd; |
| int ret = 0; |
| |
| if (!port->ops || !port->ops->pd_get) |
| return -EOPNOTSUPP; |
| |
| pds = port->ops->pd_get(port); |
| if (!pds) |
| return 0; |
| |
| for (pd = pds[0]; pd; pd++) { |
| if (pd == port->pd) |
| ret += sysfs_emit(buf + ret, "[%s] ", dev_name(&pd->dev)); |
| else |
| ret += sysfs_emit(buf + ret, "%s ", dev_name(&pd->dev)); |
| } |
| |
| buf[ret - 1] = '\n'; |
| |
| return ret; |
| } |
| static DEVICE_ATTR_RW(select_usb_power_delivery); |
| |
| static struct attribute *port_attrs[] = { |
| &dev_attr_select_usb_power_delivery.attr, |
| NULL |
| }; |
| |
| static umode_t port_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) |
| { |
| struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); |
| |
| if (!port->pd || !port->ops || !port->ops->pd_get) |
| return 0; |
| if (!port->ops->pd_set) |
| return 0444; |
| |
| return attr->mode; |
| } |
| |
| static const struct attribute_group pd_group = { |
| .is_visible = port_attr_is_visible, |
| .attrs = port_attrs, |
| }; |
| |
| 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, |
| &pd_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); |
| typec_retimer_put(port->retimer); |
| 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"); |
| kobject_uevent(&partner_dev->kobj, KOBJ_CHANGE); |
| } |
| 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); |
| |
| void typec_port_register_altmodes(struct typec_port *port, |
| const struct typec_altmode_ops *ops, void *drvdata, |
| struct typec_altmode **altmodes, size_t n) |
| { |
| struct fwnode_handle *altmodes_node, *child; |
| struct typec_altmode_desc desc; |
| struct typec_altmode *alt; |
| size_t index = 0; |
| u32 svid, vdo; |
| int ret; |
| |
| altmodes_node = device_get_named_child_node(&port->dev, "altmodes"); |
| if (!altmodes_node) |
| return; /* No altmodes specified */ |
| |
| fwnode_for_each_child_node(altmodes_node, child) { |
| ret = fwnode_property_read_u32(child, "svid", &svid); |
| if (ret) { |
| dev_err(&port->dev, "Error reading svid for altmode %s\n", |
| fwnode_get_name(child)); |
| continue; |
| } |
| |
| ret = fwnode_property_read_u32(child, "vdo", &vdo); |
| if (ret) { |
| dev_err(&port->dev, "Error reading vdo for altmode %s\n", |
| fwnode_get_name(child)); |
| continue; |
| } |
| |
| if (index >= n) { |
| dev_err(&port->dev, "Error not enough space for altmode %s\n", |
| fwnode_get_name(child)); |
| continue; |
| } |
| |
| desc.svid = svid; |
| desc.vdo = vdo; |
| desc.mode = index + 1; |
| alt = typec_port_register_altmode(port, &desc); |
| if (IS_ERR(alt)) { |
| dev_err(&port->dev, "Error registering altmode %s\n", |
| fwnode_get_name(child)); |
| continue; |
| } |
| |
| alt->ops = ops; |
| typec_altmode_set_drvdata(alt, drvdata); |
| altmodes[index] = alt; |
| index++; |
| } |
| } |
| EXPORT_SYMBOL_GPL(typec_port_register_altmodes); |
| |
| /** |
| * 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); |
| } |
| |
| port->retimer = typec_retimer_get(&port->dev); |
| if (IS_ERR(port->retimer)) { |
| ret = PTR_ERR(port->retimer); |
| 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); |
| } |
| |
| ret = typec_port_set_usb_power_delivery(port, cap->pd); |
| if (ret) { |
| dev_err(&port->dev, "failed to link pd\n"); |
| device_unregister(&port->dev); |
| return ERR_PTR(ret); |
| } |
| |
| ret = typec_link_ports(port); |
| if (ret) |
| dev_warn(&port->dev, "failed to create symlinks (%d)\n", 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)) { |
| typec_unlink_ports(port); |
| typec_port_set_usb_power_delivery(port, NULL); |
| 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; |
| |
| ret = class_register(&retimer_class); |
| if (ret) |
| goto err_unregister_mux_class; |
| |
| ret = class_register(&typec_class); |
| if (ret) |
| goto err_unregister_retimer_class; |
| |
| ret = usb_power_delivery_init(); |
| if (ret) |
| goto err_unregister_class; |
| |
| return 0; |
| |
| err_unregister_class: |
| class_unregister(&typec_class); |
| |
| err_unregister_retimer_class: |
| class_unregister(&retimer_class); |
| |
| 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) |
| { |
| usb_power_delivery_exit(); |
| class_unregister(&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"); |