// SPDX-License-Identifier: GPL-2.0
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/*
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* USB Type-C Connector Class
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*
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* Copyright (C) 2017, Intel Corporation
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* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/property.h>
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#include <linux/slab.h>
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#include <linux/usb/pd_vdo.h>
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#include <linux/android_kabi.h>
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#include "bus.h"
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struct typec_plug {
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struct device dev;
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enum typec_plug_index index;
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struct ida mode_ids;
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int num_altmodes;
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ANDROID_KABI_RESERVE(1);
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};
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struct typec_cable {
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struct device dev;
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enum typec_plug_type type;
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struct usb_pd_identity *identity;
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unsigned int active:1;
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u16 pd_revision; /* 0300H = "3.0" */
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ANDROID_KABI_RESERVE(1);
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};
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struct typec_partner {
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struct device dev;
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unsigned int usb_pd:1;
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struct usb_pd_identity *identity;
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enum typec_accessory accessory;
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struct ida mode_ids;
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int num_altmodes;
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u16 pd_revision; /* 0300H = "3.0" */
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enum usb_pd_svdm_ver svdm_version;
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ANDROID_KABI_RESERVE(1);
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};
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struct typec_port {
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unsigned int id;
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struct device dev;
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struct ida mode_ids;
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int prefer_role;
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enum typec_data_role data_role;
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enum typec_role pwr_role;
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enum typec_role vconn_role;
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enum typec_pwr_opmode pwr_opmode;
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enum typec_port_type port_type;
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struct mutex port_type_lock;
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enum typec_orientation orientation;
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struct typec_switch *sw;
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struct typec_mux *mux;
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const struct typec_capability *cap;
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const struct typec_operations *ops;
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ANDROID_KABI_RESERVE(1);
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};
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#define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
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#define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev)
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#define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev)
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#define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev)
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static const struct device_type typec_partner_dev_type;
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static const struct device_type typec_cable_dev_type;
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static const struct device_type typec_plug_dev_type;
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#define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type)
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#define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type)
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#define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type)
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static DEFINE_IDA(typec_index_ida);
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static struct class *typec_class;
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/* ------------------------------------------------------------------------- */
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/* Common attributes */
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static const char * const typec_accessory_modes[] = {
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[TYPEC_ACCESSORY_NONE] = "none",
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[TYPEC_ACCESSORY_AUDIO] = "analog_audio",
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[TYPEC_ACCESSORY_DEBUG] = "debug",
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};
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/* Product types defined in USB PD Specification R3.0 V2.0 */
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static const char * const product_type_ufp[8] = {
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[IDH_PTYPE_NOT_UFP] = "not_ufp",
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[IDH_PTYPE_HUB] = "hub",
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[IDH_PTYPE_PERIPH] = "peripheral",
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[IDH_PTYPE_PSD] = "psd",
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[IDH_PTYPE_AMA] = "ama",
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};
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static const char * const product_type_dfp[8] = {
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[IDH_PTYPE_NOT_DFP] = "not_dfp",
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[IDH_PTYPE_DFP_HUB] = "hub",
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[IDH_PTYPE_DFP_HOST] = "host",
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[IDH_PTYPE_DFP_PB] = "power_brick",
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};
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static const char * const product_type_cable[8] = {
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[IDH_PTYPE_NOT_CABLE] = "not_cable",
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[IDH_PTYPE_PCABLE] = "passive",
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[IDH_PTYPE_ACABLE] = "active",
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[IDH_PTYPE_VPD] = "vpd",
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};
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static struct usb_pd_identity *get_pd_identity(struct device *dev)
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{
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if (is_typec_partner(dev)) {
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struct typec_partner *partner = to_typec_partner(dev);
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return partner->identity;
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} else if (is_typec_cable(dev)) {
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struct typec_cable *cable = to_typec_cable(dev);
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return cable->identity;
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}
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return NULL;
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}
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static const char *get_pd_product_type(struct device *dev)
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{
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struct typec_port *port = to_typec_port(dev->parent);
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struct usb_pd_identity *id = get_pd_identity(dev);
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const char *ptype = NULL;
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if (is_typec_partner(dev)) {
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if (!id)
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return NULL;
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if (port->data_role == TYPEC_HOST)
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ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)];
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else
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ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)];
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} else if (is_typec_cable(dev)) {
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if (id)
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ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)];
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else
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ptype = to_typec_cable(dev)->active ?
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product_type_cable[IDH_PTYPE_ACABLE] :
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product_type_cable[IDH_PTYPE_PCABLE];
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}
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return ptype;
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}
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static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sprintf(buf, "0x%08x\n", id->id_header);
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}
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static DEVICE_ATTR_RO(id_header);
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static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sprintf(buf, "0x%08x\n", id->cert_stat);
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}
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static DEVICE_ATTR_RO(cert_stat);
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static ssize_t product_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sprintf(buf, "0x%08x\n", id->product);
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}
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static DEVICE_ATTR_RO(product);
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static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sysfs_emit(buf, "0x%08x\n", id->vdo[0]);
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}
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static DEVICE_ATTR_RO(product_type_vdo1);
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static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sysfs_emit(buf, "0x%08x\n", id->vdo[1]);
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}
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static DEVICE_ATTR_RO(product_type_vdo2);
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static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_pd_identity *id = get_pd_identity(dev);
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return sysfs_emit(buf, "0x%08x\n", id->vdo[2]);
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}
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static DEVICE_ATTR_RO(product_type_vdo3);
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static struct attribute *usb_pd_id_attrs[] = {
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&dev_attr_id_header.attr,
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&dev_attr_cert_stat.attr,
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&dev_attr_product.attr,
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&dev_attr_product_type_vdo1.attr,
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&dev_attr_product_type_vdo2.attr,
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&dev_attr_product_type_vdo3.attr,
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NULL
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};
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static const struct attribute_group usb_pd_id_group = {
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.name = "identity",
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.attrs = usb_pd_id_attrs,
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};
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static const struct attribute_group *usb_pd_id_groups[] = {
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&usb_pd_id_group,
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NULL,
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};
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static void typec_product_type_notify(struct device *dev)
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{
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char *envp[2] = { };
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const char *ptype;
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ptype = get_pd_product_type(dev);
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if (!ptype)
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return;
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sysfs_notify(&dev->kobj, NULL, "type");
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envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype);
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if (!envp[0])
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return;
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kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
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kfree(envp[0]);
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}
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static void typec_report_identity(struct device *dev)
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{
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sysfs_notify(&dev->kobj, "identity", "id_header");
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sysfs_notify(&dev->kobj, "identity", "cert_stat");
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sysfs_notify(&dev->kobj, "identity", "product");
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sysfs_notify(&dev->kobj, "identity", "product_type_vdo1");
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sysfs_notify(&dev->kobj, "identity", "product_type_vdo2");
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sysfs_notify(&dev->kobj, "identity", "product_type_vdo3");
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typec_product_type_notify(dev);
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}
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static ssize_t
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type_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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const char *ptype;
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ptype = get_pd_product_type(dev);
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if (!ptype)
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return 0;
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return sysfs_emit(buf, "%s\n", ptype);
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}
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static DEVICE_ATTR_RO(type);
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static ssize_t usb_power_delivery_revision_show(struct device *dev,
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struct device_attribute *attr,
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char *buf);
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static DEVICE_ATTR_RO(usb_power_delivery_revision);
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/* ------------------------------------------------------------------------- */
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/* Alternate Modes */
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static int altmode_match(struct device *dev, void *data)
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{
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struct typec_altmode *adev = to_typec_altmode(dev);
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struct typec_device_id *id = data;
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if (!is_typec_altmode(dev))
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return 0;
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return ((adev->svid == id->svid) && (adev->mode == id->mode));
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}
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static void typec_altmode_set_partner(struct altmode *altmode)
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{
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struct typec_altmode *adev = &altmode->adev;
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struct typec_device_id id = { adev->svid, adev->mode, };
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struct typec_port *port = typec_altmode2port(adev);
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struct altmode *partner;
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struct device *dev;
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dev = device_find_child(&port->dev, &id, altmode_match);
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if (!dev)
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return;
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/* Bind the port alt mode to the partner/plug alt mode. */
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partner = to_altmode(to_typec_altmode(dev));
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altmode->partner = partner;
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/* Bind the partner/plug alt mode to the port alt mode. */
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if (is_typec_plug(adev->dev.parent)) {
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struct typec_plug *plug = to_typec_plug(adev->dev.parent);
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partner->plug[plug->index] = altmode;
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} else {
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partner->partner = altmode;
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}
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}
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static void typec_altmode_put_partner(struct altmode *altmode)
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{
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struct altmode *partner = altmode->partner;
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struct typec_altmode *adev;
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if (!partner)
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return;
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adev = &partner->adev;
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if (is_typec_plug(adev->dev.parent)) {
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struct typec_plug *plug = to_typec_plug(adev->dev.parent);
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partner->plug[plug->index] = NULL;
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} else {
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partner->partner = NULL;
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}
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put_device(&adev->dev);
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}
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/**
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* typec_altmode_update_active - Report Enter/Exit mode
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* @adev: Handle to the alternate mode
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* @active: True when the mode has been entered
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*
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* If a partner or cable plug executes Enter/Exit Mode command successfully, the
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* drivers use this routine to report the updated state of the mode.
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*/
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void typec_altmode_update_active(struct typec_altmode *adev, bool active)
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{
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char dir[6];
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if (adev->active == active)
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return;
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if (!is_typec_port(adev->dev.parent) && adev->dev.driver) {
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if (!active)
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module_put(adev->dev.driver->owner);
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else
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WARN_ON(!try_module_get(adev->dev.driver->owner));
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}
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adev->active = active;
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snprintf(dir, sizeof(dir), "mode%d", adev->mode);
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sysfs_notify(&adev->dev.kobj, dir, "active");
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sysfs_notify(&adev->dev.kobj, NULL, "active");
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kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE);
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}
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EXPORT_SYMBOL_GPL(typec_altmode_update_active);
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/**
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* typec_altmode2port - Alternate Mode to USB Type-C port
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* @alt: The Alternate Mode
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*
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* Returns handle to the port that a cable plug or partner with @alt is
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* connected to.
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*/
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struct typec_port *typec_altmode2port(struct typec_altmode *alt)
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{
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if (is_typec_plug(alt->dev.parent))
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return to_typec_port(alt->dev.parent->parent->parent);
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if (is_typec_partner(alt->dev.parent))
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return to_typec_port(alt->dev.parent->parent);
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if (is_typec_port(alt->dev.parent))
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return to_typec_port(alt->dev.parent);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(typec_altmode2port);
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static ssize_t
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vdo_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct typec_altmode *alt = to_typec_altmode(dev);
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return sprintf(buf, "0x%08x\n", alt->vdo);
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}
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static DEVICE_ATTR_RO(vdo);
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static ssize_t
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description_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct typec_altmode *alt = to_typec_altmode(dev);
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return sprintf(buf, "%s\n", alt->desc ? alt->desc : "");
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}
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static DEVICE_ATTR_RO(description);
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static ssize_t
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active_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct typec_altmode *alt = to_typec_altmode(dev);
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return sprintf(buf, "%s\n", alt->active ? "yes" : "no");
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}
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static ssize_t active_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t size)
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{
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struct typec_altmode *adev = to_typec_altmode(dev);
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struct altmode *altmode = to_altmode(adev);
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bool enter;
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int ret;
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ret = kstrtobool(buf, &enter);
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if (ret)
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return ret;
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if (adev->active == enter)
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return size;
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if (is_typec_port(adev->dev.parent)) {
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typec_altmode_update_active(adev, enter);
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/* Make sure that the partner exits the mode before disabling */
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if (altmode->partner && !enter && altmode->partner->adev.active)
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typec_altmode_exit(&altmode->partner->adev);
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} else if (altmode->partner) {
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if (enter && !altmode->partner->adev.active) {
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dev_warn(dev, "port has the mode disabled\n");
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return -EPERM;
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}
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}
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/* Note: If there is no driver, the mode will not be entered */
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if (adev->ops && adev->ops->activate) {
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ret = adev->ops->activate(adev, enter);
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if (ret)
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return ret;
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}
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return size;
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}
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static DEVICE_ATTR_RW(active);
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static ssize_t
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supported_roles_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct altmode *alt = to_altmode(to_typec_altmode(dev));
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ssize_t ret;
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switch (alt->roles) {
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case TYPEC_PORT_SRC:
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ret = sprintf(buf, "source\n");
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break;
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case TYPEC_PORT_SNK:
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ret = sprintf(buf, "sink\n");
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break;
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case TYPEC_PORT_DRP:
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default:
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ret = sprintf(buf, "source sink\n");
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break;
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}
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return ret;
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}
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static DEVICE_ATTR_RO(supported_roles);
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static ssize_t
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mode_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct typec_altmode *adev = to_typec_altmode(dev);
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return sprintf(buf, "%u\n", adev->mode);
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}
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static DEVICE_ATTR_RO(mode);
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static ssize_t
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svid_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct typec_altmode *adev = to_typec_altmode(dev);
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return sprintf(buf, "%04x\n", adev->svid);
|
}
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static DEVICE_ATTR_RO(svid);
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static struct attribute *typec_altmode_attrs[] = {
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&dev_attr_active.attr,
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&dev_attr_mode.attr,
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&dev_attr_svid.attr,
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&dev_attr_vdo.attr,
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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;
|
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return attr->mode;
|
}
|
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static const struct attribute_group typec_altmode_group = {
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.is_visible = typec_altmode_attr_is_visible,
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.attrs = typec_altmode_attrs,
|
};
|
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static const struct attribute_group *typec_altmode_groups[] = {
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&typec_altmode_group,
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NULL
|
};
|
|
static int altmode_id_get(struct device *dev)
|
{
|
struct ida *ids;
|
|
if (is_typec_partner(dev))
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ids = &to_typec_partner(dev)->mode_ids;
|
else if (is_typec_plug(dev))
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ids = &to_typec_plug(dev)->mode_ids;
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else
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ids = &to_typec_port(dev)->mode_ids;
|
|
return ida_simple_get(ids, 0, 0, GFP_KERNEL);
|
}
|
|
static void altmode_id_remove(struct device *dev, int id)
|
{
|
struct ida *ids;
|
|
if (is_typec_partner(dev))
|
ids = &to_typec_partner(dev)->mode_ids;
|
else if (is_typec_plug(dev))
|
ids = &to_typec_plug(dev)->mode_ids;
|
else
|
ids = &to_typec_port(dev)->mode_ids;
|
|
ida_simple_remove(ids, id);
|
}
|
|
static void typec_altmode_release(struct device *dev)
|
{
|
struct altmode *alt = to_altmode(to_typec_altmode(dev));
|
|
typec_altmode_put_partner(alt);
|
|
altmode_id_remove(alt->adev.dev.parent, alt->id);
|
kfree(alt);
|
}
|
|
const struct device_type typec_altmode_dev_type = {
|
.name = "typec_alternate_mode",
|
.groups = typec_altmode_groups,
|
.release = typec_altmode_release,
|
};
|
|
static struct typec_altmode *
|
typec_register_altmode(struct device *parent,
|
const struct typec_altmode_desc *desc)
|
{
|
unsigned int id = altmode_id_get(parent);
|
bool is_port = is_typec_port(parent);
|
struct altmode *alt;
|
int ret;
|
|
alt = kzalloc(sizeof(*alt), GFP_KERNEL);
|
if (!alt) {
|
altmode_id_remove(parent, id);
|
return ERR_PTR(-ENOMEM);
|
}
|
|
alt->adev.svid = desc->svid;
|
alt->adev.mode = desc->mode;
|
alt->adev.vdo = desc->vdo;
|
alt->roles = desc->roles;
|
alt->id = id;
|
|
alt->attrs[0] = &dev_attr_vdo.attr;
|
alt->attrs[1] = &dev_attr_description.attr;
|
alt->attrs[2] = &dev_attr_active.attr;
|
|
if (is_port) {
|
alt->attrs[3] = &dev_attr_supported_roles.attr;
|
alt->adev.active = true; /* Enabled by default */
|
}
|
|
sprintf(alt->group_name, "mode%d", desc->mode);
|
alt->group.name = alt->group_name;
|
alt->group.attrs = alt->attrs;
|
alt->groups[0] = &alt->group;
|
|
alt->adev.dev.parent = parent;
|
alt->adev.dev.groups = alt->groups;
|
alt->adev.dev.type = &typec_altmode_dev_type;
|
dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id);
|
|
/* Link partners and plugs with the ports */
|
if (!is_port)
|
typec_altmode_set_partner(alt);
|
|
/* The partners are bind to drivers */
|
if (is_typec_partner(parent))
|
alt->adev.dev.bus = &typec_bus;
|
|
/* Plug alt modes need a class to generate udev events. */
|
if (is_typec_plug(parent))
|
alt->adev.dev.class = typec_class;
|
|
ret = device_register(&alt->adev.dev);
|
if (ret) {
|
dev_err(parent, "failed to register alternate mode (%d)\n",
|
ret);
|
put_device(&alt->adev.dev);
|
return ERR_PTR(ret);
|
}
|
|
return &alt->adev;
|
}
|
|
/**
|
* typec_unregister_altmode - Unregister Alternate Mode
|
* @adev: The alternate mode to be unregistered
|
*
|
* Unregister device created with typec_partner_register_altmode(),
|
* typec_plug_register_altmode() or typec_port_register_altmode().
|
*/
|
void typec_unregister_altmode(struct typec_altmode *adev)
|
{
|
if (IS_ERR_OR_NULL(adev))
|
return;
|
typec_mux_put(to_altmode(adev)->mux);
|
device_unregister(&adev->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_unregister_altmode);
|
|
/* ------------------------------------------------------------------------- */
|
/* Type-C Partners */
|
|
static ssize_t accessory_mode_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_partner *p = to_typec_partner(dev);
|
|
return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
|
}
|
static DEVICE_ATTR_RO(accessory_mode);
|
|
static ssize_t supports_usb_power_delivery_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_partner *p = to_typec_partner(dev);
|
|
return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no");
|
}
|
static DEVICE_ATTR_RO(supports_usb_power_delivery);
|
|
static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_partner *partner;
|
struct typec_plug *plug;
|
int num_altmodes;
|
|
if (is_typec_partner(dev)) {
|
partner = to_typec_partner(dev);
|
num_altmodes = partner->num_altmodes;
|
} else if (is_typec_plug(dev)) {
|
plug = to_typec_plug(dev);
|
num_altmodes = plug->num_altmodes;
|
} else {
|
return 0;
|
}
|
|
return sysfs_emit(buf, "%d\n", num_altmodes);
|
}
|
static DEVICE_ATTR_RO(number_of_alternate_modes);
|
|
static struct attribute *typec_partner_attrs[] = {
|
&dev_attr_accessory_mode.attr,
|
&dev_attr_supports_usb_power_delivery.attr,
|
&dev_attr_number_of_alternate_modes.attr,
|
&dev_attr_type.attr,
|
&dev_attr_usb_power_delivery_revision.attr,
|
NULL
|
};
|
|
static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
|
{
|
struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj));
|
|
if (attr == &dev_attr_number_of_alternate_modes.attr) {
|
if (partner->num_altmodes < 0)
|
return 0;
|
}
|
|
if (attr == &dev_attr_type.attr)
|
if (!get_pd_product_type(kobj_to_dev(kobj)))
|
return 0;
|
|
return attr->mode;
|
}
|
|
static const struct attribute_group typec_partner_group = {
|
.is_visible = typec_partner_attr_is_visible,
|
.attrs = typec_partner_attrs
|
};
|
|
static const struct attribute_group *typec_partner_groups[] = {
|
&typec_partner_group,
|
NULL
|
};
|
|
static void typec_partner_release(struct device *dev)
|
{
|
struct typec_partner *partner = to_typec_partner(dev);
|
|
ida_destroy(&partner->mode_ids);
|
kfree(partner);
|
}
|
|
static const struct device_type typec_partner_dev_type = {
|
.name = "typec_partner",
|
.groups = typec_partner_groups,
|
.release = typec_partner_release,
|
};
|
|
/**
|
* typec_partner_set_identity - Report result from Discover Identity command
|
* @partner: The partner updated identity values
|
*
|
* This routine is used to report that the result of Discover Identity USB power
|
* delivery command has become available.
|
*/
|
int typec_partner_set_identity(struct typec_partner *partner)
|
{
|
if (!partner->identity)
|
return -EINVAL;
|
|
typec_report_identity(&partner->dev);
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(typec_partner_set_identity);
|
|
/**
|
* typec_partner_set_pd_revision - Set the PD revision supported by the partner
|
* @partner: The partner to be updated.
|
* @pd_revision: USB Power Delivery Specification Revision supported by partner
|
*
|
* This routine is used to report that the PD revision of the port partner has
|
* become available.
|
*/
|
void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision)
|
{
|
if (partner->pd_revision == pd_revision)
|
return;
|
|
partner->pd_revision = pd_revision;
|
sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision");
|
if (pd_revision != 0 && !partner->usb_pd) {
|
partner->usb_pd = 1;
|
sysfs_notify(&partner->dev.kobj, NULL,
|
"supports_usb_power_delivery");
|
}
|
kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE);
|
}
|
EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision);
|
|
/**
|
* typec_partner_set_num_altmodes - Set the number of available partner altmodes
|
* @partner: The partner to be updated.
|
* @num_altmodes: The number of altmodes we want to specify as available.
|
*
|
* This routine is used to report the number of alternate modes supported by the
|
* partner. This value is *not* enforced in alternate mode registration routines.
|
*
|
* @partner.num_altmodes is set to -1 on partner registration, denoting that
|
* a valid value has not been set for it yet.
|
*
|
* Returns 0 on success or negative error number on failure.
|
*/
|
int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes)
|
{
|
int ret;
|
|
if (num_altmodes < 0)
|
return -EINVAL;
|
|
partner->num_altmodes = num_altmodes;
|
ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group);
|
if (ret < 0)
|
return ret;
|
|
sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes");
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes);
|
|
/**
|
* typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode
|
* @partner: USB Type-C Partner that supports the alternate mode
|
* @desc: Description of the alternate mode
|
*
|
* This routine is used to register each alternate mode individually that
|
* @partner has listed in response to Discover SVIDs command. The modes for a
|
* SVID listed in response to Discover Modes command need to be listed in an
|
* array in @desc.
|
*
|
* Returns handle to the alternate mode on success or ERR_PTR on failure.
|
*/
|
struct typec_altmode *
|
typec_partner_register_altmode(struct typec_partner *partner,
|
const struct typec_altmode_desc *desc)
|
{
|
return typec_register_altmode(&partner->dev, desc);
|
}
|
EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
|
|
/**
|
* typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version
|
* @partner: USB Type-C Partner that supports SVDM
|
* @svdm_version: Negotiated SVDM Version
|
*
|
* This routine is used to save the negotiated SVDM Version.
|
*/
|
void typec_partner_set_svdm_version(struct typec_partner *partner,
|
enum usb_pd_svdm_ver svdm_version)
|
{
|
partner->svdm_version = svdm_version;
|
}
|
EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version);
|
|
/**
|
* typec_register_partner - Register a USB Type-C Partner
|
* @port: The USB Type-C Port the partner is connected to
|
* @desc: Description of the partner
|
*
|
* Registers a device for USB Type-C Partner described in @desc.
|
*
|
* Returns handle to the partner on success or ERR_PTR on failure.
|
*/
|
struct typec_partner *typec_register_partner(struct typec_port *port,
|
struct typec_partner_desc *desc)
|
{
|
struct typec_partner *partner;
|
int ret;
|
|
partner = kzalloc(sizeof(*partner), GFP_KERNEL);
|
if (!partner)
|
return ERR_PTR(-ENOMEM);
|
|
ida_init(&partner->mode_ids);
|
partner->usb_pd = desc->usb_pd;
|
partner->accessory = desc->accessory;
|
partner->num_altmodes = -1;
|
partner->pd_revision = desc->pd_revision;
|
partner->svdm_version = port->cap->svdm_version;
|
|
if (desc->identity) {
|
/*
|
* Creating directory for the identity only if the driver is
|
* able to provide data to it.
|
*/
|
partner->dev.groups = usb_pd_id_groups;
|
partner->identity = desc->identity;
|
}
|
|
partner->dev.class = typec_class;
|
partner->dev.parent = &port->dev;
|
partner->dev.type = &typec_partner_dev_type;
|
dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev));
|
|
ret = device_register(&partner->dev);
|
if (ret) {
|
dev_err(&port->dev, "failed to register partner (%d)\n", ret);
|
put_device(&partner->dev);
|
return ERR_PTR(ret);
|
}
|
|
return partner;
|
}
|
EXPORT_SYMBOL_GPL(typec_register_partner);
|
|
/**
|
* typec_unregister_partner - Unregister a USB Type-C Partner
|
* @partner: The partner to be unregistered
|
*
|
* Unregister device created with typec_register_partner().
|
*/
|
void typec_unregister_partner(struct typec_partner *partner)
|
{
|
if (!IS_ERR_OR_NULL(partner))
|
device_unregister(&partner->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_unregister_partner);
|
|
/* ------------------------------------------------------------------------- */
|
/* Type-C Cable Plugs */
|
|
static void typec_plug_release(struct device *dev)
|
{
|
struct typec_plug *plug = to_typec_plug(dev);
|
|
ida_destroy(&plug->mode_ids);
|
kfree(plug);
|
}
|
|
static struct attribute *typec_plug_attrs[] = {
|
&dev_attr_number_of_alternate_modes.attr,
|
NULL
|
};
|
|
static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
|
{
|
struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj));
|
|
if (attr == &dev_attr_number_of_alternate_modes.attr) {
|
if (plug->num_altmodes < 0)
|
return 0;
|
}
|
|
return attr->mode;
|
}
|
|
static const struct attribute_group typec_plug_group = {
|
.is_visible = typec_plug_attr_is_visible,
|
.attrs = typec_plug_attrs
|
};
|
|
static const struct attribute_group *typec_plug_groups[] = {
|
&typec_plug_group,
|
NULL
|
};
|
|
static const struct device_type typec_plug_dev_type = {
|
.name = "typec_plug",
|
.groups = typec_plug_groups,
|
.release = typec_plug_release,
|
};
|
|
/**
|
* typec_plug_set_num_altmodes - Set the number of available plug altmodes
|
* @plug: The plug to be updated.
|
* @num_altmodes: The number of altmodes we want to specify as available.
|
*
|
* This routine is used to report the number of alternate modes supported by the
|
* plug. This value is *not* enforced in alternate mode registration routines.
|
*
|
* @plug.num_altmodes is set to -1 on plug registration, denoting that
|
* a valid value has not been set for it yet.
|
*
|
* Returns 0 on success or negative error number on failure.
|
*/
|
int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes)
|
{
|
int ret;
|
|
if (num_altmodes < 0)
|
return -EINVAL;
|
|
plug->num_altmodes = num_altmodes;
|
ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group);
|
if (ret < 0)
|
return ret;
|
|
sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes");
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes);
|
|
/**
|
* typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode
|
* @plug: USB Type-C Cable Plug that supports the alternate mode
|
* @desc: Description of the alternate mode
|
*
|
* This routine is used to register each alternate mode individually that @plug
|
* has listed in response to Discover SVIDs command. The modes for a SVID that
|
* the plug lists in response to Discover Modes command need to be listed in an
|
* array in @desc.
|
*
|
* Returns handle to the alternate mode on success or ERR_PTR on failure.
|
*/
|
struct typec_altmode *
|
typec_plug_register_altmode(struct typec_plug *plug,
|
const struct typec_altmode_desc *desc)
|
{
|
return typec_register_altmode(&plug->dev, desc);
|
}
|
EXPORT_SYMBOL_GPL(typec_plug_register_altmode);
|
|
/**
|
* typec_register_plug - Register a USB Type-C Cable Plug
|
* @cable: USB Type-C Cable with the plug
|
* @desc: Description of the cable plug
|
*
|
* Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C
|
* Cable Plug represents a plug with electronics in it that can response to USB
|
* Power Delivery SOP Prime or SOP Double Prime packages.
|
*
|
* Returns handle to the cable plug on success or ERR_PTR on failure.
|
*/
|
struct typec_plug *typec_register_plug(struct typec_cable *cable,
|
struct typec_plug_desc *desc)
|
{
|
struct typec_plug *plug;
|
char name[8];
|
int ret;
|
|
plug = kzalloc(sizeof(*plug), GFP_KERNEL);
|
if (!plug)
|
return ERR_PTR(-ENOMEM);
|
|
sprintf(name, "plug%d", desc->index);
|
|
ida_init(&plug->mode_ids);
|
plug->num_altmodes = -1;
|
plug->index = desc->index;
|
plug->dev.class = typec_class;
|
plug->dev.parent = &cable->dev;
|
plug->dev.type = &typec_plug_dev_type;
|
dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name);
|
|
ret = device_register(&plug->dev);
|
if (ret) {
|
dev_err(&cable->dev, "failed to register plug (%d)\n", ret);
|
put_device(&plug->dev);
|
return ERR_PTR(ret);
|
}
|
|
return plug;
|
}
|
EXPORT_SYMBOL_GPL(typec_register_plug);
|
|
/**
|
* typec_unregister_plug - Unregister a USB Type-C Cable Plug
|
* @plug: The cable plug to be unregistered
|
*
|
* Unregister device created with typec_register_plug().
|
*/
|
void typec_unregister_plug(struct typec_plug *plug)
|
{
|
if (!IS_ERR_OR_NULL(plug))
|
device_unregister(&plug->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_unregister_plug);
|
|
/* Type-C Cables */
|
|
static const char * const typec_plug_types[] = {
|
[USB_PLUG_NONE] = "unknown",
|
[USB_PLUG_TYPE_A] = "type-a",
|
[USB_PLUG_TYPE_B] = "type-b",
|
[USB_PLUG_TYPE_C] = "type-c",
|
[USB_PLUG_CAPTIVE] = "captive",
|
};
|
|
static ssize_t plug_type_show(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
struct typec_cable *cable = to_typec_cable(dev);
|
|
return sprintf(buf, "%s\n", typec_plug_types[cable->type]);
|
}
|
static DEVICE_ATTR_RO(plug_type);
|
|
static struct attribute *typec_cable_attrs[] = {
|
&dev_attr_type.attr,
|
&dev_attr_plug_type.attr,
|
&dev_attr_usb_power_delivery_revision.attr,
|
NULL
|
};
|
ATTRIBUTE_GROUPS(typec_cable);
|
|
static void typec_cable_release(struct device *dev)
|
{
|
struct typec_cable *cable = to_typec_cable(dev);
|
|
kfree(cable);
|
}
|
|
static const struct device_type typec_cable_dev_type = {
|
.name = "typec_cable",
|
.groups = typec_cable_groups,
|
.release = typec_cable_release,
|
};
|
|
static int cable_match(struct device *dev, void *data)
|
{
|
return is_typec_cable(dev);
|
}
|
|
/**
|
* typec_cable_get - Get a reference to the USB Type-C cable
|
* @port: The USB Type-C Port the cable is connected to
|
*
|
* The caller must decrement the reference count with typec_cable_put() after
|
* use.
|
*/
|
struct typec_cable *typec_cable_get(struct typec_port *port)
|
{
|
struct device *dev;
|
|
dev = device_find_child(&port->dev, NULL, cable_match);
|
if (!dev)
|
return NULL;
|
|
return to_typec_cable(dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_cable_get);
|
|
/**
|
* typec_cable_put - Decrement the reference count on USB Type-C cable
|
* @cable: The USB Type-C cable
|
*/
|
void typec_cable_put(struct typec_cable *cable)
|
{
|
put_device(&cable->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_cable_put);
|
|
/**
|
* typec_cable_is_active - Check is the USB Type-C cable active or passive
|
* @cable: The USB Type-C Cable
|
*
|
* Return 1 if the cable is active or 0 if it's passive.
|
*/
|
int typec_cable_is_active(struct typec_cable *cable)
|
{
|
return cable->active;
|
}
|
EXPORT_SYMBOL_GPL(typec_cable_is_active);
|
|
/**
|
* typec_cable_set_identity - Report result from Discover Identity command
|
* @cable: The cable updated identity values
|
*
|
* This routine is used to report that the result of Discover Identity USB power
|
* delivery command has become available.
|
*/
|
int typec_cable_set_identity(struct typec_cable *cable)
|
{
|
if (!cable->identity)
|
return -EINVAL;
|
|
typec_report_identity(&cable->dev);
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(typec_cable_set_identity);
|
|
/**
|
* typec_register_cable - Register a USB Type-C Cable
|
* @port: The USB Type-C Port the cable is connected to
|
* @desc: Description of the cable
|
*
|
* Registers a device for USB Type-C Cable described in @desc. The cable will be
|
* parent for the optional cable plug devises.
|
*
|
* Returns handle to the cable on success or ERR_PTR on failure.
|
*/
|
struct typec_cable *typec_register_cable(struct typec_port *port,
|
struct typec_cable_desc *desc)
|
{
|
struct typec_cable *cable;
|
int ret;
|
|
cable = kzalloc(sizeof(*cable), GFP_KERNEL);
|
if (!cable)
|
return ERR_PTR(-ENOMEM);
|
|
cable->type = desc->type;
|
cable->active = desc->active;
|
cable->pd_revision = desc->pd_revision;
|
|
if (desc->identity) {
|
/*
|
* Creating directory for the identity only if the driver is
|
* able to provide data to it.
|
*/
|
cable->dev.groups = usb_pd_id_groups;
|
cable->identity = desc->identity;
|
}
|
|
cable->dev.class = typec_class;
|
cable->dev.parent = &port->dev;
|
cable->dev.type = &typec_cable_dev_type;
|
dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev));
|
|
ret = device_register(&cable->dev);
|
if (ret) {
|
dev_err(&port->dev, "failed to register cable (%d)\n", ret);
|
put_device(&cable->dev);
|
return ERR_PTR(ret);
|
}
|
|
return cable;
|
}
|
EXPORT_SYMBOL_GPL(typec_register_cable);
|
|
/**
|
* typec_unregister_cable - Unregister a USB Type-C Cable
|
* @cable: The cable to be unregistered
|
*
|
* Unregister device created with typec_register_cable().
|
*/
|
void typec_unregister_cable(struct typec_cable *cable)
|
{
|
if (!IS_ERR_OR_NULL(cable))
|
device_unregister(&cable->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_unregister_cable);
|
|
/* ------------------------------------------------------------------------- */
|
/* USB Type-C ports */
|
|
static const char * const typec_orientations[] = {
|
[TYPEC_ORIENTATION_NONE] = "unknown",
|
[TYPEC_ORIENTATION_NORMAL] = "normal",
|
[TYPEC_ORIENTATION_REVERSE] = "reverse",
|
};
|
|
static const char * const typec_roles[] = {
|
[TYPEC_SINK] = "sink",
|
[TYPEC_SOURCE] = "source",
|
};
|
|
static const char * const typec_data_roles[] = {
|
[TYPEC_DEVICE] = "device",
|
[TYPEC_HOST] = "host",
|
};
|
|
static const char * const typec_port_power_roles[] = {
|
[TYPEC_PORT_SRC] = "source",
|
[TYPEC_PORT_SNK] = "sink",
|
[TYPEC_PORT_DRP] = "dual",
|
};
|
|
static const char * const typec_port_data_roles[] = {
|
[TYPEC_PORT_DFP] = "host",
|
[TYPEC_PORT_UFP] = "device",
|
[TYPEC_PORT_DRD] = "dual",
|
};
|
|
static const char * const typec_port_types_drp[] = {
|
[TYPEC_PORT_SRC] = "dual [source] sink",
|
[TYPEC_PORT_SNK] = "dual source [sink]",
|
[TYPEC_PORT_DRP] = "[dual] source sink",
|
};
|
|
static ssize_t
|
preferred_role_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
int role;
|
int ret;
|
|
if (port->cap->type != TYPEC_PORT_DRP) {
|
dev_dbg(dev, "Preferred role only supported with DRP ports\n");
|
return -EOPNOTSUPP;
|
}
|
|
if (!port->ops || !port->ops->try_role) {
|
dev_dbg(dev, "Setting preferred role not supported\n");
|
return -EOPNOTSUPP;
|
}
|
|
role = sysfs_match_string(typec_roles, buf);
|
if (role < 0) {
|
if (sysfs_streq(buf, "none"))
|
role = TYPEC_NO_PREFERRED_ROLE;
|
else
|
return -EINVAL;
|
}
|
|
ret = port->ops->try_role(port, role);
|
if (ret)
|
return ret;
|
|
port->prefer_role = role;
|
return size;
|
}
|
|
static ssize_t
|
preferred_role_show(struct device *dev, struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
if (port->cap->type != TYPEC_PORT_DRP)
|
return 0;
|
|
if (port->prefer_role < 0)
|
return 0;
|
|
return sprintf(buf, "%s\n", typec_roles[port->prefer_role]);
|
}
|
static DEVICE_ATTR_RW(preferred_role);
|
|
static ssize_t data_role_store(struct device *dev,
|
struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
int ret;
|
|
if (!port->ops || !port->ops->dr_set) {
|
dev_dbg(dev, "data role swapping not supported\n");
|
return -EOPNOTSUPP;
|
}
|
|
ret = sysfs_match_string(typec_data_roles, buf);
|
if (ret < 0)
|
return ret;
|
|
mutex_lock(&port->port_type_lock);
|
if (port->cap->data != TYPEC_PORT_DRD) {
|
ret = -EOPNOTSUPP;
|
goto unlock_and_ret;
|
}
|
|
ret = port->ops->dr_set(port, ret);
|
if (ret)
|
goto unlock_and_ret;
|
|
ret = size;
|
unlock_and_ret:
|
mutex_unlock(&port->port_type_lock);
|
return ret;
|
}
|
|
static ssize_t data_role_show(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
if (port->cap->data == TYPEC_PORT_DRD)
|
return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
|
"[host] device" : "host [device]");
|
|
return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]);
|
}
|
static DEVICE_ATTR_RW(data_role);
|
|
static ssize_t power_role_store(struct device *dev,
|
struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
int ret;
|
|
if (!port->ops || !port->ops->pr_set) {
|
dev_dbg(dev, "power role swapping not supported\n");
|
return -EOPNOTSUPP;
|
}
|
|
if (port->pwr_opmode != TYPEC_PWR_MODE_PD) {
|
dev_dbg(dev, "partner unable to swap power role\n");
|
return -EIO;
|
}
|
|
ret = sysfs_match_string(typec_roles, buf);
|
if (ret < 0)
|
return ret;
|
|
mutex_lock(&port->port_type_lock);
|
if (port->port_type != TYPEC_PORT_DRP) {
|
dev_dbg(dev, "port type fixed at \"%s\"",
|
typec_port_power_roles[port->port_type]);
|
ret = -EOPNOTSUPP;
|
goto unlock_and_ret;
|
}
|
|
ret = port->ops->pr_set(port, ret);
|
if (ret)
|
goto unlock_and_ret;
|
|
ret = size;
|
unlock_and_ret:
|
mutex_unlock(&port->port_type_lock);
|
return ret;
|
}
|
|
static ssize_t power_role_show(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
if (port->cap->type == TYPEC_PORT_DRP)
|
return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ?
|
"[source] sink" : "source [sink]");
|
|
return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]);
|
}
|
static DEVICE_ATTR_RW(power_role);
|
|
static ssize_t
|
port_type_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
int ret;
|
enum typec_port_type type;
|
|
if (port->cap->type != TYPEC_PORT_DRP ||
|
!port->ops || !port->ops->port_type_set) {
|
dev_dbg(dev, "changing port type not supported\n");
|
return -EOPNOTSUPP;
|
}
|
|
ret = sysfs_match_string(typec_port_power_roles, buf);
|
if (ret < 0)
|
return ret;
|
|
type = ret;
|
mutex_lock(&port->port_type_lock);
|
|
if (port->port_type == type) {
|
ret = size;
|
goto unlock_and_ret;
|
}
|
|
ret = port->ops->port_type_set(port, type);
|
if (ret)
|
goto unlock_and_ret;
|
|
port->port_type = type;
|
ret = size;
|
|
unlock_and_ret:
|
mutex_unlock(&port->port_type_lock);
|
return ret;
|
}
|
|
static ssize_t
|
port_type_show(struct device *dev, struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
if (port->cap->type == TYPEC_PORT_DRP)
|
return sprintf(buf, "%s\n",
|
typec_port_types_drp[port->port_type]);
|
|
return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]);
|
}
|
static DEVICE_ATTR_RW(port_type);
|
|
static const char * const typec_pwr_opmodes[] = {
|
[TYPEC_PWR_MODE_USB] = "default",
|
[TYPEC_PWR_MODE_1_5A] = "1.5A",
|
[TYPEC_PWR_MODE_3_0A] = "3.0A",
|
[TYPEC_PWR_MODE_PD] = "usb_power_delivery",
|
};
|
|
static ssize_t power_operation_mode_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]);
|
}
|
static DEVICE_ATTR_RO(power_operation_mode);
|
|
static ssize_t vconn_source_store(struct device *dev,
|
struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
bool source;
|
int ret;
|
|
if (!port->cap->pd_revision) {
|
dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n");
|
return -EOPNOTSUPP;
|
}
|
|
if (!port->ops || !port->ops->vconn_set) {
|
dev_dbg(dev, "VCONN swapping not supported\n");
|
return -EOPNOTSUPP;
|
}
|
|
ret = kstrtobool(buf, &source);
|
if (ret)
|
return ret;
|
|
ret = port->ops->vconn_set(port, (enum typec_role)source);
|
if (ret)
|
return ret;
|
|
return size;
|
}
|
|
static ssize_t vconn_source_show(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
return sprintf(buf, "%s\n",
|
port->vconn_role == TYPEC_SOURCE ? "yes" : "no");
|
}
|
static DEVICE_ATTR_RW(vconn_source);
|
|
static ssize_t supported_accessory_modes_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
ssize_t ret = 0;
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) {
|
if (port->cap->accessory[i])
|
ret += sprintf(buf + ret, "%s ",
|
typec_accessory_modes[port->cap->accessory[i]]);
|
}
|
|
if (!ret)
|
return sprintf(buf, "none\n");
|
|
buf[ret - 1] = '\n';
|
|
return ret;
|
}
|
static DEVICE_ATTR_RO(supported_accessory_modes);
|
|
static ssize_t usb_typec_revision_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
u16 rev = port->cap->revision;
|
|
return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
|
}
|
static DEVICE_ATTR_RO(usb_typec_revision);
|
|
static ssize_t usb_power_delivery_revision_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
u16 rev = 0;
|
|
if (is_typec_partner(dev)) {
|
struct typec_partner *partner = to_typec_partner(dev);
|
|
rev = partner->pd_revision;
|
} else if (is_typec_cable(dev)) {
|
struct typec_cable *cable = to_typec_cable(dev);
|
|
rev = cable->pd_revision;
|
} else if (is_typec_port(dev)) {
|
struct typec_port *p = to_typec_port(dev);
|
|
rev = p->cap->pd_revision;
|
}
|
return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
|
}
|
|
static ssize_t orientation_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
return sprintf(buf, "%s\n", typec_orientations[port->orientation]);
|
}
|
static DEVICE_ATTR_RO(orientation);
|
|
static struct attribute *typec_attrs[] = {
|
&dev_attr_data_role.attr,
|
&dev_attr_power_operation_mode.attr,
|
&dev_attr_power_role.attr,
|
&dev_attr_preferred_role.attr,
|
&dev_attr_supported_accessory_modes.attr,
|
&dev_attr_usb_power_delivery_revision.attr,
|
&dev_attr_usb_typec_revision.attr,
|
&dev_attr_vconn_source.attr,
|
&dev_attr_port_type.attr,
|
&dev_attr_orientation.attr,
|
NULL,
|
};
|
|
static umode_t typec_attr_is_visible(struct kobject *kobj,
|
struct attribute *attr, int n)
|
{
|
struct typec_port *port = to_typec_port(kobj_to_dev(kobj));
|
|
if (attr == &dev_attr_data_role.attr) {
|
if (port->cap->data != TYPEC_PORT_DRD ||
|
!port->ops || !port->ops->dr_set)
|
return 0444;
|
} else if (attr == &dev_attr_power_role.attr) {
|
if (port->cap->type != TYPEC_PORT_DRP ||
|
!port->ops || !port->ops->pr_set)
|
return 0444;
|
} else if (attr == &dev_attr_vconn_source.attr) {
|
if (!port->cap->pd_revision ||
|
!port->ops || !port->ops->vconn_set)
|
return 0444;
|
} else if (attr == &dev_attr_preferred_role.attr) {
|
if (port->cap->type != TYPEC_PORT_DRP ||
|
!port->ops || !port->ops->try_role)
|
return 0444;
|
} else if (attr == &dev_attr_port_type.attr) {
|
if (!port->ops || !port->ops->port_type_set)
|
return 0;
|
if (port->cap->type != TYPEC_PORT_DRP)
|
return 0444;
|
} else if (attr == &dev_attr_orientation.attr) {
|
if (port->cap->orientation_aware)
|
return 0444;
|
return 0;
|
}
|
|
return attr->mode;
|
}
|
|
static const struct attribute_group typec_group = {
|
.is_visible = typec_attr_is_visible,
|
.attrs = typec_attrs,
|
};
|
|
static const struct attribute_group *typec_groups[] = {
|
&typec_group,
|
NULL
|
};
|
|
static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
|
{
|
int ret;
|
|
ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev));
|
if (ret)
|
dev_err(dev, "failed to add uevent TYPEC_PORT\n");
|
|
return ret;
|
}
|
|
static void typec_release(struct device *dev)
|
{
|
struct typec_port *port = to_typec_port(dev);
|
|
ida_simple_remove(&typec_index_ida, port->id);
|
ida_destroy(&port->mode_ids);
|
typec_switch_put(port->sw);
|
typec_mux_put(port->mux);
|
kfree(port->cap);
|
kfree(port);
|
}
|
|
const struct device_type typec_port_dev_type = {
|
.name = "typec_port",
|
.groups = typec_groups,
|
.uevent = typec_uevent,
|
.release = typec_release,
|
};
|
|
/* --------------------------------------- */
|
/* Driver callbacks to report role updates */
|
|
static int partner_match(struct device *dev, void *data)
|
{
|
return is_typec_partner(dev);
|
}
|
|
/**
|
* typec_set_data_role - Report data role change
|
* @port: The USB Type-C Port where the role was changed
|
* @role: The new data role
|
*
|
* This routine is used by the port drivers to report data role changes.
|
*/
|
void typec_set_data_role(struct typec_port *port, enum typec_data_role role)
|
{
|
struct device *partner_dev;
|
|
if (port->data_role == role)
|
return;
|
|
port->data_role = role;
|
sysfs_notify(&port->dev.kobj, NULL, "data_role");
|
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
|
|
partner_dev = device_find_child(&port->dev, NULL, partner_match);
|
if (!partner_dev)
|
return;
|
|
if (to_typec_partner(partner_dev)->identity)
|
typec_product_type_notify(partner_dev);
|
|
put_device(partner_dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_set_data_role);
|
|
/**
|
* typec_set_pwr_role - Report power role change
|
* @port: The USB Type-C Port where the role was changed
|
* @role: The new data role
|
*
|
* This routine is used by the port drivers to report power role changes.
|
*/
|
void typec_set_pwr_role(struct typec_port *port, enum typec_role role)
|
{
|
if (port->pwr_role == role)
|
return;
|
|
port->pwr_role = role;
|
sysfs_notify(&port->dev.kobj, NULL, "power_role");
|
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
|
}
|
EXPORT_SYMBOL_GPL(typec_set_pwr_role);
|
|
/**
|
* typec_set_vconn_role - Report VCONN source change
|
* @port: The USB Type-C Port which VCONN role changed
|
* @role: Source when @port is sourcing VCONN, or Sink when it's not
|
*
|
* This routine is used by the port drivers to report if the VCONN source is
|
* changes.
|
*/
|
void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
|
{
|
if (port->vconn_role == role)
|
return;
|
|
port->vconn_role = role;
|
sysfs_notify(&port->dev.kobj, NULL, "vconn_source");
|
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
|
}
|
EXPORT_SYMBOL_GPL(typec_set_vconn_role);
|
|
/**
|
* typec_set_pwr_opmode - Report changed power operation mode
|
* @port: The USB Type-C Port where the mode was changed
|
* @opmode: New power operation mode
|
*
|
* This routine is used by the port drivers to report changed power operation
|
* mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB
|
* Type-C specification, and "USB Power Delivery" when the power levels are
|
* negotiated with methods defined in USB Power Delivery specification.
|
*/
|
void typec_set_pwr_opmode(struct typec_port *port,
|
enum typec_pwr_opmode opmode)
|
{
|
struct device *partner_dev;
|
|
if (port->pwr_opmode == opmode)
|
return;
|
|
port->pwr_opmode = opmode;
|
sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
|
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
|
|
partner_dev = device_find_child(&port->dev, NULL, partner_match);
|
if (partner_dev) {
|
struct typec_partner *partner = to_typec_partner(partner_dev);
|
|
if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
|
partner->usb_pd = 1;
|
sysfs_notify(&partner_dev->kobj, NULL,
|
"supports_usb_power_delivery");
|
kobject_uevent(&partner_dev->kobj, KOBJ_CHANGE);
|
}
|
put_device(partner_dev);
|
}
|
}
|
EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
|
|
/**
|
* typec_find_pwr_opmode - Get the typec power operation mode capability
|
* @name: power operation mode string
|
*
|
* This routine is used to find the typec_pwr_opmode by its string @name.
|
*
|
* Returns typec_pwr_opmode if success, otherwise negative error code.
|
*/
|
int typec_find_pwr_opmode(const char *name)
|
{
|
return match_string(typec_pwr_opmodes,
|
ARRAY_SIZE(typec_pwr_opmodes), name);
|
}
|
EXPORT_SYMBOL_GPL(typec_find_pwr_opmode);
|
|
/**
|
* typec_find_orientation - Convert orientation string to enum typec_orientation
|
* @name: Orientation string
|
*
|
* This routine is used to find the typec_orientation by its string name @name.
|
*
|
* Returns the orientation value on success, otherwise negative error code.
|
*/
|
int typec_find_orientation(const char *name)
|
{
|
return match_string(typec_orientations, ARRAY_SIZE(typec_orientations),
|
name);
|
}
|
EXPORT_SYMBOL_GPL(typec_find_orientation);
|
|
/**
|
* typec_find_port_power_role - Get the typec port power capability
|
* @name: port power capability string
|
*
|
* This routine is used to find the typec_port_type by its string name.
|
*
|
* Returns typec_port_type if success, otherwise negative error code.
|
*/
|
int typec_find_port_power_role(const char *name)
|
{
|
return match_string(typec_port_power_roles,
|
ARRAY_SIZE(typec_port_power_roles), name);
|
}
|
EXPORT_SYMBOL_GPL(typec_find_port_power_role);
|
|
/**
|
* typec_find_power_role - Find the typec one specific power role
|
* @name: power role string
|
*
|
* This routine is used to find the typec_role by its string name.
|
*
|
* Returns typec_role if success, otherwise negative error code.
|
*/
|
int typec_find_power_role(const char *name)
|
{
|
return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
|
}
|
EXPORT_SYMBOL_GPL(typec_find_power_role);
|
|
/**
|
* typec_find_port_data_role - Get the typec port data capability
|
* @name: port data capability string
|
*
|
* This routine is used to find the typec_port_data by its string name.
|
*
|
* Returns typec_port_data if success, otherwise negative error code.
|
*/
|
int typec_find_port_data_role(const char *name)
|
{
|
return match_string(typec_port_data_roles,
|
ARRAY_SIZE(typec_port_data_roles), name);
|
}
|
EXPORT_SYMBOL_GPL(typec_find_port_data_role);
|
|
/* ------------------------------------------ */
|
/* API for Multiplexer/DeMultiplexer Switches */
|
|
/**
|
* typec_set_orientation - Set USB Type-C cable plug orientation
|
* @port: USB Type-C Port
|
* @orientation: USB Type-C cable plug orientation
|
*
|
* Set cable plug orientation for @port.
|
*/
|
int typec_set_orientation(struct typec_port *port,
|
enum typec_orientation orientation)
|
{
|
int ret;
|
|
ret = typec_switch_set(port->sw, orientation);
|
if (ret)
|
return ret;
|
|
port->orientation = orientation;
|
sysfs_notify(&port->dev.kobj, NULL, "orientation");
|
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(typec_set_orientation);
|
|
/**
|
* typec_get_orientation - Get USB Type-C cable plug orientation
|
* @port: USB Type-C Port
|
*
|
* Get current cable plug orientation for @port.
|
*/
|
enum typec_orientation typec_get_orientation(struct typec_port *port)
|
{
|
return port->orientation;
|
}
|
EXPORT_SYMBOL_GPL(typec_get_orientation);
|
|
/**
|
* typec_set_mode - Set mode of operation for USB Type-C connector
|
* @port: USB Type-C connector
|
* @mode: Accessory Mode, USB Operation or Safe State
|
*
|
* Configure @port for Accessory Mode @mode. This function will configure the
|
* muxes needed for @mode.
|
*/
|
int typec_set_mode(struct typec_port *port, int mode)
|
{
|
struct typec_mux_state state = { };
|
|
state.mode = mode;
|
|
return typec_mux_set(port->mux, &state);
|
}
|
EXPORT_SYMBOL_GPL(typec_set_mode);
|
|
/* --------------------------------------- */
|
|
/**
|
* typec_get_negotiated_svdm_version - Get negotiated SVDM Version
|
* @port: USB Type-C Port.
|
*
|
* Get the negotiated SVDM Version. The Version is set to the port default
|
* value stored in typec_capability on partner registration, and updated after
|
* a successful Discover Identity if the negotiated value is less than the
|
* default value.
|
*
|
* Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV.
|
*/
|
int typec_get_negotiated_svdm_version(struct typec_port *port)
|
{
|
enum usb_pd_svdm_ver svdm_version;
|
struct device *partner_dev;
|
|
partner_dev = device_find_child(&port->dev, NULL, partner_match);
|
if (!partner_dev)
|
return -ENODEV;
|
|
svdm_version = to_typec_partner(partner_dev)->svdm_version;
|
put_device(partner_dev);
|
|
return svdm_version;
|
}
|
EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version);
|
|
/**
|
* typec_get_drvdata - Return private driver data pointer
|
* @port: USB Type-C port
|
*/
|
void *typec_get_drvdata(struct typec_port *port)
|
{
|
return dev_get_drvdata(&port->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_get_drvdata);
|
|
/**
|
* typec_port_register_altmode - Register USB Type-C Port Alternate Mode
|
* @port: USB Type-C Port that supports the alternate mode
|
* @desc: Description of the alternate mode
|
*
|
* This routine is used to register an alternate mode that @port is capable of
|
* supporting.
|
*
|
* Returns handle to the alternate mode on success or ERR_PTR on failure.
|
*/
|
struct typec_altmode *
|
typec_port_register_altmode(struct typec_port *port,
|
const struct typec_altmode_desc *desc)
|
{
|
struct typec_altmode *adev;
|
struct typec_mux *mux;
|
|
mux = typec_mux_get(&port->dev, desc);
|
if (IS_ERR(mux))
|
return ERR_CAST(mux);
|
|
adev = typec_register_altmode(&port->dev, desc);
|
if (IS_ERR(adev))
|
typec_mux_put(mux);
|
else
|
to_altmode(adev)->mux = mux;
|
|
return adev;
|
}
|
EXPORT_SYMBOL_GPL(typec_port_register_altmode);
|
|
#ifdef CONFIG_NO_GKI
|
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);
|
#endif /* CONFIG_NO_GKI */
|
|
/**
|
* typec_register_port - Register a USB Type-C Port
|
* @parent: Parent device
|
* @cap: Description of the port
|
*
|
* Registers a device for USB Type-C Port described in @cap.
|
*
|
* Returns handle to the port on success or ERR_PTR on failure.
|
*/
|
struct typec_port *typec_register_port(struct device *parent,
|
const struct typec_capability *cap)
|
{
|
struct typec_port *port;
|
int ret;
|
int id;
|
|
port = kzalloc(sizeof(*port), GFP_KERNEL);
|
if (!port)
|
return ERR_PTR(-ENOMEM);
|
|
id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
|
if (id < 0) {
|
kfree(port);
|
return ERR_PTR(id);
|
}
|
|
switch (cap->type) {
|
case TYPEC_PORT_SRC:
|
port->pwr_role = TYPEC_SOURCE;
|
port->vconn_role = TYPEC_SOURCE;
|
break;
|
case TYPEC_PORT_SNK:
|
port->pwr_role = TYPEC_SINK;
|
port->vconn_role = TYPEC_SINK;
|
break;
|
case TYPEC_PORT_DRP:
|
if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE)
|
port->pwr_role = cap->prefer_role;
|
else
|
port->pwr_role = TYPEC_SINK;
|
break;
|
}
|
|
switch (cap->data) {
|
case TYPEC_PORT_DFP:
|
port->data_role = TYPEC_HOST;
|
break;
|
case TYPEC_PORT_UFP:
|
port->data_role = TYPEC_DEVICE;
|
break;
|
case TYPEC_PORT_DRD:
|
if (cap->prefer_role == TYPEC_SOURCE)
|
port->data_role = TYPEC_HOST;
|
else
|
port->data_role = TYPEC_DEVICE;
|
break;
|
}
|
|
ida_init(&port->mode_ids);
|
mutex_init(&port->port_type_lock);
|
|
port->id = id;
|
port->ops = cap->ops;
|
port->port_type = cap->type;
|
port->prefer_role = cap->prefer_role;
|
|
device_initialize(&port->dev);
|
port->dev.class = typec_class;
|
port->dev.parent = parent;
|
port->dev.fwnode = cap->fwnode;
|
port->dev.type = &typec_port_dev_type;
|
dev_set_name(&port->dev, "port%d", id);
|
dev_set_drvdata(&port->dev, cap->driver_data);
|
|
port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
|
if (!port->cap) {
|
put_device(&port->dev);
|
return ERR_PTR(-ENOMEM);
|
}
|
|
port->sw = typec_switch_get(&port->dev);
|
if (IS_ERR(port->sw)) {
|
ret = PTR_ERR(port->sw);
|
put_device(&port->dev);
|
return ERR_PTR(ret);
|
}
|
|
port->mux = typec_mux_get(&port->dev, NULL);
|
if (IS_ERR(port->mux)) {
|
ret = PTR_ERR(port->mux);
|
put_device(&port->dev);
|
return ERR_PTR(ret);
|
}
|
|
ret = device_add(&port->dev);
|
if (ret) {
|
dev_err(parent, "failed to register port (%d)\n", ret);
|
put_device(&port->dev);
|
return ERR_PTR(ret);
|
}
|
|
return port;
|
}
|
EXPORT_SYMBOL_GPL(typec_register_port);
|
|
/**
|
* typec_unregister_port - Unregister a USB Type-C Port
|
* @port: The port to be unregistered
|
*
|
* Unregister device created with typec_register_port().
|
*/
|
void typec_unregister_port(struct typec_port *port)
|
{
|
if (!IS_ERR_OR_NULL(port))
|
device_unregister(&port->dev);
|
}
|
EXPORT_SYMBOL_GPL(typec_unregister_port);
|
|
static int __init typec_init(void)
|
{
|
int ret;
|
|
ret = bus_register(&typec_bus);
|
if (ret)
|
return ret;
|
|
ret = class_register(&typec_mux_class);
|
if (ret)
|
goto err_unregister_bus;
|
|
typec_class = class_create(THIS_MODULE, "typec");
|
if (IS_ERR(typec_class)) {
|
ret = PTR_ERR(typec_class);
|
goto err_unregister_mux_class;
|
}
|
|
return 0;
|
|
err_unregister_mux_class:
|
class_unregister(&typec_mux_class);
|
|
err_unregister_bus:
|
bus_unregister(&typec_bus);
|
|
return ret;
|
}
|
subsys_initcall(typec_init);
|
|
static void __exit typec_exit(void)
|
{
|
class_destroy(typec_class);
|
ida_destroy(&typec_index_ida);
|
bus_unregister(&typec_bus);
|
class_unregister(&typec_mux_class);
|
}
|
module_exit(typec_exit);
|
|
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
|
MODULE_LICENSE("GPL v2");
|
MODULE_DESCRIPTION("USB Type-C Connector Class");
|
