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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0/* * USB Type-C Connector Class * * Copyright (C) 2017, Intel Corporation * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> */
#include <linux/module.h>#include <linux/mutex.h>#include <linux/property.h>#include <linux/slab.h>#include <linux/string_choices.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);
const 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_ttype_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);
static const char * const usb_modes[] = { [USB_MODE_NONE] = "none", [USB_MODE_USB2] = "usb2", [USB_MODE_USB3] = "usb3", [USB_MODE_USB4] = "usb4"};
/* ------------------------------------------------------------------------- *//* Alternate Modes */
static int altmode_match(struct device *dev, const void *data){ struct typec_altmode *adev = to_typec_altmode(dev); const struct typec_device_id *id = data;
if (!is_typec_port_altmode(dev)) return 0;
return (adev->svid == id->svid);}
static void typec_altmode_set_partner(struct altmode *altmode){ struct typec_altmode *adev = &altmode->adev; struct typec_device_id id = { adev->svid }; 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; struct typec_altmode *partner_adev;
if (!partner) return;
adev = &altmode->adev; partner_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(&partner_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_tvdo_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_tdescription_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_tactive_show(struct device *dev, struct device_attribute *attr, char *buf){ struct typec_altmode *alt = to_typec_altmode(dev);
return sprintf(buf, "%s\n", str_yes_no(alt->active));}
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_tsupported_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_tmode_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_tsvid_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 int increment_duplicated_priority(struct device *dev, void *data){ if (is_typec_port_altmode(dev)) { struct typec_altmode **alt_target = (struct typec_altmode **)data; struct typec_altmode *alt = to_typec_altmode(dev);
if (alt != *alt_target && alt->priority == (*alt_target)->priority) { alt->priority++; *alt_target = alt; return 1; } } return 0;}
static int find_duplicated_priority(struct device *dev, void *data){ if (is_typec_port_altmode(dev)) { struct typec_altmode **alt_target = (struct typec_altmode **)data; struct typec_altmode *alt = to_typec_altmode(dev);
if (alt != *alt_target && alt->priority == (*alt_target)->priority) return 1; } return 0;}
static int typec_mode_set_priority(struct typec_altmode *alt, const u8 priority){ struct typec_port *port = to_typec_port(alt->dev.parent); const u8 old_priority = alt->priority; int res = 1;
alt->priority = priority; while (res) { res = device_for_each_child(&port->dev, &alt, find_duplicated_priority); if (res) { alt->priority++; if (alt->priority == 0) { alt->priority = old_priority; return -EOVERFLOW; } } }
res = 1; alt->priority = priority; while (res) res = device_for_each_child(&port->dev, &alt, increment_duplicated_priority);
return 0;}
static ssize_t priority_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size){ u8 val; int err = kstrtou8(buf, 10, &val);
if (!err) err = typec_mode_set_priority(to_typec_altmode(dev), val);
if (!err) return size; return err;}
static ssize_t priority_show(struct device *dev, struct device_attribute *attr, char *buf){ return sysfs_emit(buf, "%u\n", to_typec_altmode(dev)->priority);}static DEVICE_ATTR_RW(priority);
static struct attribute *typec_altmode_attrs[] = { &dev_attr_active.attr, &dev_attr_mode.attr, &dev_attr_svid.attr, &dev_attr_vdo.attr, &dev_attr_priority.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)); struct typec_port *port = typec_altmode2port(adev);
if (attr == &dev_attr_active.attr) { if (!is_typec_port(adev->dev.parent)) { if (!port->mode_control || !adev->ops || !adev->ops->activate) return 0444; } } else if (attr == &dev_attr_priority.attr) { if (!is_typec_port(adev->dev.parent) || !port->mode_control) return 0; }
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};
/** * typec_altmode_set_ops - Set ops for altmode * @adev: Handle to the alternate mode * @ops: Ops for the alternate mode * * After setting ops, attribute visiblity needs to be refreshed if the alternate * mode can be activated. */void typec_altmode_set_ops(struct typec_altmode *adev, const struct typec_altmode_ops *ops){ adev->ops = ops; sysfs_update_group(&adev->dev.kobj, &typec_altmode_group);}EXPORT_SYMBOL_GPL(typec_altmode_set_ops);
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_alloc(ids, 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_free(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); put_device(alt->adev.dev.parent); kfree(alt);}
const struct device_type typec_port_altmode_dev_type = { .name = "typec_port_alternate_mode", .groups = typec_altmode_groups, .release = typec_altmode_release,};EXPORT_SYMBOL_GPL(typec_port_altmode_dev_type);
const struct device_type typec_plug_altmode_dev_type = { .name = "typec_plug_alternate_mode", .groups = typec_altmode_groups, .release = typec_altmode_release,};EXPORT_SYMBOL_GPL(typec_plug_altmode_dev_type);
const struct device_type typec_partner_altmode_dev_type = { .name = "typec_partner_alternate_mode", .groups = typec_altmode_groups, .release = typec_altmode_release,};EXPORT_SYMBOL_GPL(typec_partner_altmode_dev_type);
static struct typec_altmode *typec_register_altmode(struct device *parent, const struct typec_altmode_desc *desc, const struct device_type *type){ unsigned int id = altmode_id_get(parent); bool is_port = is_typec_port(parent); struct altmode *alt; int ret;
alt = kzalloc_obj(*alt); 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->adev.mode_selection = desc->mode_selection; 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 = !desc->inactive; /* 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 = type; dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id);
get_device(alt->adev.dev.parent);
/* Link partners and plugs with the ports */ if (!is_port) typec_altmode_set_partner(alt);
alt->adev.dev.bus = &typec_bus;
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 */
/** * typec_partner_set_usb_mode - Assign active USB Mode for the partner * @partner: USB Type-C partner * @mode: USB Mode (USB2, USB3 or USB4) * * The port drivers can use this function to assign the active USB Mode to * @partner. The USB Mode can change for example due to Data Reset. */void typec_partner_set_usb_mode(struct typec_partner *partner, enum usb_mode mode){ if (!partner || partner->usb_mode == mode) return;
partner->usb_capability |= BIT(mode - 1); partner->usb_mode = mode; sysfs_notify(&partner->dev.kobj, NULL, "usb_mode");}EXPORT_SYMBOL_GPL(typec_partner_set_usb_mode);
static ssize_tusb_mode_show(struct device *dev, struct device_attribute *attr, char *buf){ struct typec_partner *partner = to_typec_partner(dev); int len = 0; int i;
for (i = USB_MODE_USB2; i < USB_MODE_USB4 + 1; i++) { if (!(BIT(i - 1) & partner->usb_capability)) continue;
if (i == partner->usb_mode) len += sysfs_emit_at(buf, len, "[%s] ", usb_modes[i]); else len += sysfs_emit_at(buf, len, "%s ", usb_modes[i]); }
sysfs_emit_at(buf, len - 1, "\n");
return len;}
static ssize_t usb_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size){ struct typec_partner *partner = to_typec_partner(dev); struct typec_port *port = to_typec_port(dev->parent); int mode; int ret;
if (!port->ops || !port->ops->enter_usb_mode) return -EOPNOTSUPP;
mode = sysfs_match_string(usb_modes, buf); if (mode < 0) return mode;
if (mode == partner->usb_mode) return size;
ret = port->ops->enter_usb_mode(port, mode); if (ret) return ret;
typec_partner_set_usb_mode(partner, mode);
return size;}static DEVICE_ATTR_RW(usb_mode);
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", str_yes_no(p->usb_pd));}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_mode.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)); struct typec_port *port = to_typec_port(partner->dev.parent);
if (attr == &dev_attr_usb_mode.attr) { if (!partner->usb_capability) return 0; if (!port->ops || !port->ops->enter_usb_mode) return 0444; }
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){ u8 usb_capability = partner->usb_capability; struct device *dev = &partner->dev; struct usb_pd_identity *id;
id = get_pd_identity(dev); if (!id) return -EINVAL;
if (to_typec_port(dev->parent)->data_role == TYPEC_HOST) { u32 devcap = PD_VDO_UFP_DEVCAP(id->vdo[0]);
if (devcap & (DEV_USB2_CAPABLE | DEV_USB2_BILLBOARD)) usb_capability |= USB_CAPABILITY_USB2; if (devcap & DEV_USB3_CAPABLE) usb_capability |= USB_CAPABILITY_USB3; if (devcap & DEV_USB4_CAPABLE) usb_capability |= USB_CAPABILITY_USB4; } else { usb_capability = PD_VDO_DFP_HOSTCAP(id->vdo[0]); }
if (partner->usb_capability != usb_capability) { partner->usb_capability = usb_capability; sysfs_notify(&dev->kobj, NULL, "usb_mode"); }
typec_report_identity(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, &typec_partner_altmode_dev_type);}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_obj(*partner); 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->usb_capability = desc->usb_capability; 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));
if (port->usb2_dev) { partner->usb_capability |= USB_CAPABILITY_USB2; partner->usb_mode = USB_MODE_USB2; } if (port->usb3_dev) { partner->usb_capability |= USB_CAPABILITY_USB2 | USB_CAPABILITY_USB3; partner->usb_mode = USB_MODE_USB3; }
mutex_lock(&port->partner_link_lock); ret = device_register(&partner->dev); if (ret) { dev_err(&port->dev, "failed to register partner (%d)\n", ret); mutex_unlock(&port->partner_link_lock); 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); mutex_unlock(&port->partner_link_lock);
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);
mutex_lock(&port->partner_link_lock); if (port->usb2_dev) { typec_partner_unlink_device(partner, port->usb2_dev); port->usb2_dev = NULL; } if (port->usb3_dev) { typec_partner_unlink_device(partner, port->usb3_dev); port->usb3_dev = NULL; }
device_unregister(&partner->dev); mutex_unlock(&port->partner_link_lock);}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, &typec_plug_altmode_dev_type);}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_obj(*plug); 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,};
/** * 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, &typec_cable_dev_type, device_match_type); 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_obj(*cable); 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_mode - Set the operational USB mode for the port * @port: USB Type-C port * @mode: USB Mode (USB2, USB3 or USB4) * * @mode will be used with the next Enter_USB message. Existing connections are * not affected. */void typec_port_set_usb_mode(struct typec_port *port, enum usb_mode mode){ port->usb_mode = mode;}EXPORT_SYMBOL_GPL(typec_port_set_usb_mode);
static ssize_tusb_capability_show(struct device *dev, struct device_attribute *attr, char *buf){ struct typec_port *port = to_typec_port(dev); int len = 0; int i;
for (i = USB_MODE_USB2; i < USB_MODE_USB4 + 1; i++) { if (!(BIT(i - 1) & port->cap->usb_capability)) continue;
if (i == port->usb_mode) len += sysfs_emit_at(buf, len, "[%s] ", usb_modes[i]); else len += sysfs_emit_at(buf, len, "%s ", usb_modes[i]); }
sysfs_emit_at(buf, len - 1, "\n");
return len;}
static ssize_tusb_capability_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size){ struct typec_port *port = to_typec_port(dev); int ret = 0; int mode;
if (!port->ops || !port->ops->default_usb_mode_set) return -EOPNOTSUPP;
mode = sysfs_match_string(usb_modes, buf); if (mode < 0) return mode;
ret = port->ops->default_usb_mode_set(port, mode); if (ret) return ret;
port->usb_mode = mode;
return size;}static DEVICE_ATTR_RW(usb_capability);
/** * 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; int ret;
if (!port->ops || !port->ops->pd_set) return -EOPNOTSUPP;
pd = usb_power_delivery_find(buf); if (!pd) return -EINVAL;
ret = port->ops->pd_set(port, pd); put_device(&pd->dev); if (ret) return ret;
return size;}
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_tpreferred_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_tpreferred_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_tport_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_tport_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", str_yes_no(port->vconn_role == TYPEC_SOURCE));}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, &dev_attr_usb_capability.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; } else if (attr == &dev_attr_usb_capability.attr) { if (!port->cap->usb_capability) return 0; if (!port->ops || !port->ops->default_usb_mode_set) return 0444; }
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_free(&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 struct typec_partner *typec_get_partner(struct typec_port *port){ struct device *dev;
dev = device_find_child(&port->dev, &typec_partner_dev_type, device_match_type); 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; struct usb_device *udev = to_usb_device(dev); enum usb_mode usb_mode;
mutex_lock(&port->partner_link_lock); if (udev->speed < USB_SPEED_SUPER) { usb_mode = USB_MODE_USB2; port->usb2_dev = dev; } else { usb_mode = USB_MODE_USB3; port->usb3_dev = dev; }
partner = typec_get_partner(port); if (partner) { typec_partner_set_usb_mode(partner, usb_mode); typec_partner_link_device(partner, dev); put_device(&partner->dev); } mutex_unlock(&port->partner_link_lock);}
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;
mutex_lock(&port->partner_link_lock); 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; mutex_unlock(&port->partner_link_lock);}
/** * 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_get_data_role - Get port data role * @port: The USB Type-C Port to query * * This routine is used by the altmode drivers to determine if the port is the * DFP before issuing Enter Mode */enum typec_data_role typec_get_data_role(struct typec_port *port){ return port->data_role;}EXPORT_SYMBOL_GPL(typec_get_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, &typec_partner_dev_type, device_match_type); 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, &typec_partner_dev_type, device_match_type); 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_cable_svdm_version - Get cable negotiated SVDM Version * @port: USB Type-C Port. * * Get the negotiated SVDM Version for the cable. The Version is set to the port * default value based on the PD Revision during cable registration, and updated * after a successful Discover Identity if the negotiated value is less than the * default. * * Returns usb_pd_svdm_ver if the cable has been registered otherwise -ENODEV. */int typec_get_cable_svdm_version(struct typec_port *port){ enum usb_pd_svdm_ver svdm_version; struct device *cable_dev;
cable_dev = device_find_child(&port->dev, &typec_cable_dev_type, device_match_type); if (!cable_dev) return -ENODEV;
svdm_version = to_typec_cable(cable_dev)->svdm_version; put_device(cable_dev);
return svdm_version;}EXPORT_SYMBOL_GPL(typec_get_cable_svdm_version);
/** * typec_cable_set_svdm_version - Set negotiated Structured VDM (SVDM) Version * @cable: USB Type-C Active Cable that supports SVDM * @svdm_version: Negotiated SVDM Version * * This routine is used to save the negotiated SVDM Version. */void typec_cable_set_svdm_version(struct typec_cable *cable, enum usb_pd_svdm_ver svdm_version){ cable->svdm_version = svdm_version;}EXPORT_SYMBOL_GPL(typec_cable_set_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; int ret;
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, &typec_port_altmode_dev_type); if (IS_ERR(adev)) { typec_retimer_put(retimer); typec_mux_put(mux); } else { to_altmode(adev)->mux = mux; to_altmode(adev)->retimer = retimer;
ret = typec_mode_set_priority(adev, 0); if (ret) { typec_unregister_altmode(adev); return ERR_PTR(ret); } }
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 *child; struct typec_altmode_desc desc; struct typec_altmode *alt; size_t index = 0; u16 svid; u32 vdo; int ret;
struct fwnode_handle *altmodes_node __free(fwnode_handle) = 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_u16(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; }
typec_altmode_set_ops(alt, ops); typec_altmode_set_drvdata(alt, drvdata); altmodes[index] = alt; index++; }}EXPORT_SYMBOL_GPL(typec_port_register_altmodes);
/** * typec_port_register_cable_ops - Register typec_cable_ops to port altmodes * @altmodes: USB Type-C Port's altmode vector * @max_altmodes: The maximum number of alt modes supported by the port * @ops: Cable alternate mode vector */void typec_port_register_cable_ops(struct typec_altmode **altmodes, int max_altmodes, const struct typec_cable_ops *ops){ int i;
for (i = 0; i < max_altmodes; i++) { if (!altmodes[i]) return; altmodes[i]->cable_ops = ops; }}EXPORT_SYMBOL_GPL(typec_port_register_cable_ops);
/** * 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_obj(*port); if (!port) return ERR_PTR(-ENOMEM);
id = ida_alloc(&typec_index_ida, 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); mutex_init(&port->partner_link_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;
if (cap->usb_capability & USB_CAPABILITY_USB4) port->usb_mode = USB_MODE_USB4; else if (cap->usb_capability & USB_CAPABILITY_USB3) port->usb_mode = USB_MODE_USB3; else if (cap->usb_capability & USB_CAPABILITY_USB2) port->usb_mode = USB_MODE_USB2;
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; port->mode_control = !cap->no_mode_control;
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");