| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Heikki Krogerus | 8504 | 81.43% | 30 | 43.48% |
| Prashant Malani | 621 | 5.95% | 10 | 14.49% |
| Badhri Jagan Sridharan | 407 | 3.90% | 2 | 2.90% |
| Hans de Goede | 246 | 2.36% | 1 | 1.45% |
| Samuel Holland | 179 | 1.71% | 1 | 1.45% |
| Benson Leung | 141 | 1.35% | 3 | 4.35% |
| Kyle Tso | 138 | 1.32% | 7 | 10.14% |
| Li Jun | 111 | 1.06% | 1 | 1.45% |
| Wen Yang | 28 | 0.27% | 1 | 1.45% |
| Amelie Delaunay | 21 | 0.20% | 1 | 1.45% |
| RD Babiera | 11 | 0.11% | 1 | 1.45% |
| Linyu Yuan | 10 | 0.10% | 1 | 1.45% |
| Jing Xiangfeng | 9 | 0.09% | 1 | 1.45% |
| Rikard Falkeborn | 4 | 0.04% | 1 | 1.45% |
| Mats Kärrman | 4 | 0.04% | 1 | 1.45% |
| Guenter Roeck | 3 | 0.03% | 1 | 1.45% |
| Greg Kroah-Hartman | 3 | 0.03% | 3 | 4.35% |
| Randy Dunlap | 1 | 0.01% | 1 | 1.45% |
| Azhar Shaikh | 1 | 0.01% | 1 | 1.45% |
| Stephen Boyd | 1 | 0.01% | 1 | 1.45% |
| Total | 10443 | 69 |
// 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 <linux/usb.h> #include "bus.h" #include "class.h" #include "pd.h" static DEFINE_IDA(typec_index_ida); struct class typec_class = { .name = "typec", }; /* ------------------------------------------------------------------------- */ /* 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 = &altmode->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)); if (!is_typec_port(dev->parent)) 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_retimer_put(to_altmode(adev)->retimer); 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, }; static void typec_partner_link_device(struct typec_partner *partner, struct device *dev) { int ret; ret = sysfs_create_link(&dev->kobj, &partner->dev.kobj, "typec"); if (ret) return; ret = sysfs_create_link(&partner->dev.kobj, &dev->kobj, dev_name(dev)); if (ret) { sysfs_remove_link(&dev->kobj, "typec"); return; } if (partner->attach) partner->attach(partner, dev); } static void typec_partner_unlink_device(struct typec_partner *partner, struct device *dev) { sysfs_remove_link(&partner->dev.kobj, dev_name(dev)); sysfs_remove_link(&dev->kobj, "typec"); if (partner->deattach) partner->deattach(partner, dev); } /** * 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_partner_usb_power_delivery_register - Register Type-C partner USB Power Delivery Support * @partner: Type-C partner device. * @desc: Description of the USB PD contract. * * This routine is a wrapper around usb_power_delivery_register(). It registers * USB Power Delivery Capabilities for a Type-C partner device. Specifically, * it sets the Type-C partner device as a parent for the resulting USB Power Delivery object. * * Returns handle to struct usb_power_delivery or ERR_PTR. */ struct usb_power_delivery * typec_partner_usb_power_delivery_register(struct typec_partner *partner, struct usb_power_delivery_desc *desc) { return usb_power_delivery_register(&partner->dev, desc); } EXPORT_SYMBOL_GPL(typec_partner_usb_power_delivery_register); /** * 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; partner->attach = desc->attach; partner->deattach = desc->deattach; 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); } if (port->usb2_dev) typec_partner_link_device(partner, port->usb2_dev); if (port->usb3_dev) typec_partner_link_device(partner, port->usb3_dev); 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) { struct typec_port *port; if (IS_ERR_OR_NULL(partner)) return; port = to_typec_port(partner->dev.parent); if (port->usb2_dev) typec_partner_unlink_device(partner, port->usb2_dev); if (port->usb3_dev) typec_partner_unlink_device(partner, port->usb3_dev); 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; int i, ret = 0; if (!port->ops || !port->ops->pd_get) return -EOPNOTSUPP; pds = port->ops->pd_get(port); if (!pds) return 0; for (i = 0; pds[i]; i++) { if (pds[i] == port->pd) ret += sysfs_emit_at(buf, ret, "[%s] ", dev_name(&pds[i]->dev)); else ret += sysfs_emit_at(buf, ret, "%s ", dev_name(&pds[i]->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(const 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); } static struct typec_partner *typec_get_partner(struct typec_port *port) { struct device *dev; dev = device_find_child(&port->dev, NULL, partner_match); if (!dev) return NULL; return to_typec_partner(dev); } static void typec_partner_attach(struct typec_connector *con, struct device *dev) { struct typec_port *port = container_of(con, struct typec_port, con); struct typec_partner *partner = typec_get_partner(port); struct usb_device *udev = to_usb_device(dev); if (udev->speed < USB_SPEED_SUPER) port->usb2_dev = dev; else port->usb3_dev = dev; if (partner) { typec_partner_link_device(partner, dev); put_device(&partner->dev); } } static void typec_partner_deattach(struct typec_connector *con, struct device *dev) { struct typec_port *port = container_of(con, struct typec_port, con); struct typec_partner *partner = typec_get_partner(port); if (partner) { typec_partner_unlink_device(partner, dev); put_device(&partner->dev); } if (port->usb2_dev == dev) port->usb2_dev = NULL; else if (port->usb3_dev == dev) port->usb3_dev = NULL; } /** * 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 typec_partner *partner; 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 = typec_get_partner(port); if (!partner) return; if (partner->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); int typec_get_fw_cap(struct typec_capability *cap, struct fwnode_handle *fwnode) { const char *cap_str; int ret; cap->fwnode = fwnode; ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); if (ret < 0) return ret; ret = typec_find_port_power_role(cap_str); if (ret < 0) return ret; cap->type = ret; /* USB data support is optional */ ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); if (ret == 0) { ret = typec_find_port_data_role(cap_str); if (ret < 0) return ret; cap->data = ret; } /* Get the preferred power role for a DRP */ if (cap->type == TYPEC_PORT_DRP) { cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); if (ret == 0) { ret = typec_find_power_role(cap_str); if (ret < 0) return ret; cap->prefer_role = ret; } } return 0; } EXPORT_SYMBOL_GPL(typec_get_fw_cap); /** * 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; struct typec_retimer *retimer; mux = typec_mux_get(&port->dev); if (IS_ERR(mux)) return ERR_CAST(mux); retimer = typec_retimer_get(&port->dev); if (IS_ERR(retimer)) { typec_mux_put(mux); return ERR_CAST(retimer); } adev = typec_register_altmode(&port->dev, desc); if (IS_ERR(adev)) { typec_retimer_put(retimer); typec_mux_put(mux); } else { to_altmode(adev)->mux = mux; to_altmode(adev)->retimer = retimer; } 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; port->con.attach = typec_partner_attach; port->con.deattach = typec_partner_deattach; 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); 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); } port->pd = cap->pd; 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 = usb_power_delivery_link_device(port->pd, &port->dev); 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); class_unregister(&retimer_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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