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@@ -0,0 +1,1262 @@
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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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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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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/slab.h>
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+#include <linux/usb/typec.h>
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+
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+struct typec_mode {
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+ int index;
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+ u32 vdo;
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+ char *desc;
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+ enum typec_port_type roles;
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+
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+ struct typec_altmode *alt_mode;
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+
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+ unsigned int active:1;
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+
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+ char group_name[6];
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+ struct attribute_group group;
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+ struct attribute *attrs[5];
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+ struct device_attribute vdo_attr;
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+ struct device_attribute desc_attr;
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+ struct device_attribute active_attr;
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+ struct device_attribute roles_attr;
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+};
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+
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+struct typec_altmode {
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+ struct device dev;
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+ u16 svid;
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+ int n_modes;
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+ struct typec_mode modes[ALTMODE_MAX_MODES];
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+ const struct attribute_group *mode_groups[ALTMODE_MAX_MODES];
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+};
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+
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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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+};
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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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+};
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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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+};
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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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+
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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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+
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+ const struct typec_capability *cap;
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+};
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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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+#define to_altmode(_dev_) container_of(_dev_, struct typec_altmode, dev)
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+
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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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+static const struct device_type typec_port_dev_type;
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+
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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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+#define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+ NULL
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+};
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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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+
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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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+
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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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+}
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+
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+/* ------------------------------------------------------------------------- */
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+/* Alternate Modes */
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+
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+/**
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+ * typec_altmode_update_active - Report Enter/Exit mode
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+ * @alt: Handle to the alternate mode
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+ * @mode: Mode index
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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 *alt, int mode,
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+ bool active)
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+{
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+ struct typec_mode *m = &alt->modes[mode];
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+ char dir[6];
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+
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+ if (m->active == active)
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+ return;
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+
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+ m->active = active;
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+ snprintf(dir, sizeof(dir), "mode%d", mode);
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+ sysfs_notify(&alt->dev.kobj, dir, "active");
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+ kobject_uevent(&alt->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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+/**
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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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+
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+ return NULL;
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+}
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+EXPORT_SYMBOL_GPL(typec_altmode2port);
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+
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+static ssize_t
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+typec_altmode_vdo_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct typec_mode *mode = container_of(attr, struct typec_mode,
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+ vdo_attr);
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+
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+ return sprintf(buf, "0x%08x\n", mode->vdo);
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+}
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+
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+static ssize_t
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+typec_altmode_desc_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct typec_mode *mode = container_of(attr, struct typec_mode,
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+ desc_attr);
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+
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+ return sprintf(buf, "%s\n", mode->desc ? mode->desc : "");
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+}
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+
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+static ssize_t
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+typec_altmode_active_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct typec_mode *mode = container_of(attr, struct typec_mode,
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+ active_attr);
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+
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+ return sprintf(buf, "%s\n", mode->active ? "yes" : "no");
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+}
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+
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+static ssize_t
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+typec_altmode_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_mode *mode = container_of(attr, struct typec_mode,
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+ active_attr);
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+ struct typec_port *port = typec_altmode2port(mode->alt_mode);
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+ bool activate;
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+ int ret;
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+
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+ if (!port->cap->activate_mode)
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+ return -EOPNOTSUPP;
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+
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+ ret = kstrtobool(buf, &activate);
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+ if (ret)
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+ return ret;
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+
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+ ret = port->cap->activate_mode(port->cap, mode->index, activate);
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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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+
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+static ssize_t
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+typec_altmode_roles_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct typec_mode *mode = container_of(attr, struct typec_mode,
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+ roles_attr);
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+ ssize_t ret;
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+
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+ switch (mode->roles) {
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+ case TYPEC_PORT_DFP:
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+ ret = sprintf(buf, "source\n");
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+ break;
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+ case TYPEC_PORT_UFP:
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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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+
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+static void typec_init_modes(struct typec_altmode *alt,
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+ struct typec_mode_desc *desc, bool is_port)
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+{
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+ int i;
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+
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+ for (i = 0; i < alt->n_modes; i++, desc++) {
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+ struct typec_mode *mode = &alt->modes[i];
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+
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+ /* Not considering the human readable description critical */
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+ mode->desc = kstrdup(desc->desc, GFP_KERNEL);
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+ if (desc->desc && !mode->desc)
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+ dev_err(&alt->dev, "failed to copy mode%d desc\n", i);
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+
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+ mode->alt_mode = alt;
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+ mode->vdo = desc->vdo;
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+ mode->roles = desc->roles;
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+ mode->index = desc->index;
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+ sprintf(mode->group_name, "mode%d", desc->index);
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+
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+ sysfs_attr_init(&mode->vdo_attr.attr);
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+ mode->vdo_attr.attr.name = "vdo";
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+ mode->vdo_attr.attr.mode = 0444;
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+ mode->vdo_attr.show = typec_altmode_vdo_show;
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+
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+ sysfs_attr_init(&mode->desc_attr.attr);
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+ mode->desc_attr.attr.name = "description";
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+ mode->desc_attr.attr.mode = 0444;
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+ mode->desc_attr.show = typec_altmode_desc_show;
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+
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+ sysfs_attr_init(&mode->active_attr.attr);
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+ mode->active_attr.attr.name = "active";
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+ mode->active_attr.attr.mode = 0644;
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+ mode->active_attr.show = typec_altmode_active_show;
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+ mode->active_attr.store = typec_altmode_active_store;
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+
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+ mode->attrs[0] = &mode->vdo_attr.attr;
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+ mode->attrs[1] = &mode->desc_attr.attr;
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+ mode->attrs[2] = &mode->active_attr.attr;
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+
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+ /* With ports, list the roles that the mode is supported with */
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+ if (is_port) {
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+ sysfs_attr_init(&mode->roles_attr.attr);
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+ mode->roles_attr.attr.name = "supported_roles";
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+ mode->roles_attr.attr.mode = 0444;
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+ mode->roles_attr.show = typec_altmode_roles_show;
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+
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+ mode->attrs[3] = &mode->roles_attr.attr;
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+ }
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+
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+ mode->group.attrs = mode->attrs;
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+ mode->group.name = mode->group_name;
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+
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+ alt->mode_groups[i] = &mode->group;
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+ }
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+}
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+
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+static ssize_t svid_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct typec_altmode *alt = to_altmode(dev);
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+
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+ return sprintf(buf, "%04x\n", alt->svid);
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+}
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+static DEVICE_ATTR_RO(svid);
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+
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+static struct attribute *typec_altmode_attrs[] = {
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+ &dev_attr_svid.attr,
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+ NULL
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+};
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+ATTRIBUTE_GROUPS(typec_altmode);
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+
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+static void typec_altmode_release(struct device *dev)
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+{
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+ struct typec_altmode *alt = to_altmode(dev);
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+ int i;
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+
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+ for (i = 0; i < alt->n_modes; i++)
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+ kfree(alt->modes[i].desc);
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+ kfree(alt);
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+}
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+
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+static const struct device_type typec_altmode_dev_type = {
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+ .name = "typec_alternate_mode",
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+ .groups = typec_altmode_groups,
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+ .release = typec_altmode_release,
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+};
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+
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+static struct typec_altmode *
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+typec_register_altmode(struct device *parent, struct typec_altmode_desc *desc)
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+{
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+ struct typec_altmode *alt;
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+ int ret;
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+
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+ alt = kzalloc(sizeof(*alt), GFP_KERNEL);
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+ if (!alt)
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+ return NULL;
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+
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+ alt->svid = desc->svid;
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+ alt->n_modes = desc->n_modes;
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+ typec_init_modes(alt, desc->modes, is_typec_port(parent));
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+
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+ alt->dev.parent = parent;
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+ alt->dev.groups = alt->mode_groups;
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+ alt->dev.type = &typec_altmode_dev_type;
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+ dev_set_name(&alt->dev, "svid-%04x", alt->svid);
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+
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+ ret = device_register(&alt->dev);
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+ if (ret) {
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+ dev_err(parent, "failed to register alternate mode (%d)\n",
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+ ret);
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+ put_device(&alt->dev);
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+ return NULL;
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+ }
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+
|
|
|
+ return alt;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * typec_unregister_altmode - Unregister Alternate Mode
|
|
|
+ * @alt: 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 *alt)
|
|
|
+{
|
|
|
+ if (alt)
|
|
|
+ device_unregister(&alt->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 struct attribute *typec_partner_attrs[] = {
|
|
|
+ &dev_attr_accessory_mode.attr,
|
|
|
+ &dev_attr_supports_usb_power_delivery.attr,
|
|
|
+ NULL
|
|
|
+};
|
|
|
+ATTRIBUTE_GROUPS(typec_partner);
|
|
|
+
|
|
|
+static void typec_partner_release(struct device *dev)
|
|
|
+{
|
|
|
+ struct typec_partner *partner = to_typec_partner(dev);
|
|
|
+
|
|
|
+ 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_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 NULL on failure.
|
|
|
+ */
|
|
|
+struct typec_altmode *
|
|
|
+typec_partner_register_altmode(struct typec_partner *partner,
|
|
|
+ struct typec_altmode_desc *desc)
|
|
|
+{
|
|
|
+ return typec_register_altmode(&partner->dev, desc);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
|
|
|
+
|
|
|
+/**
|
|
|
+ * 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 NULL 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 NULL;
|
|
|
+
|
|
|
+ partner->usb_pd = desc->usb_pd;
|
|
|
+ partner->accessory = desc->accessory;
|
|
|
+
|
|
|
+ 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 NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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 (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);
|
|
|
+
|
|
|
+ kfree(plug);
|
|
|
+}
|
|
|
+
|
|
|
+static const struct device_type typec_plug_dev_type = {
|
|
|
+ .name = "typec_plug",
|
|
|
+ .release = typec_plug_release,
|
|
|
+};
|
|
|
+
|
|
|
+/**
|
|
|
+ * 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 NULL on failure.
|
|
|
+ */
|
|
|
+struct typec_altmode *
|
|
|
+typec_plug_register_altmode(struct typec_plug *plug,
|
|
|
+ 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 NULL 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 NULL;
|
|
|
+
|
|
|
+ sprintf(name, "plug%d", desc->index);
|
|
|
+
|
|
|
+ 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 NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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 (plug)
|
|
|
+ device_unregister(&plug->dev);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_unregister_plug);
|
|
|
+
|
|
|
+/* Type-C Cables */
|
|
|
+
|
|
|
+static ssize_t
|
|
|
+type_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
|
+{
|
|
|
+ struct typec_cable *cable = to_typec_cable(dev);
|
|
|
+
|
|
|
+ return sprintf(buf, "%s\n", cable->active ? "active" : "passive");
|
|
|
+}
|
|
|
+static DEVICE_ATTR_RO(type);
|
|
|
+
|
|
|
+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,
|
|
|
+ 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,
|
|
|
+};
|
|
|
+
|
|
|
+/**
|
|
|
+ * 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 NULL 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 NULL;
|
|
|
+
|
|
|
+ cable->type = desc->type;
|
|
|
+ cable->active = desc->active;
|
|
|
+
|
|
|
+ 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 NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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 (cable)
|
|
|
+ device_unregister(&cable->dev);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_unregister_cable);
|
|
|
+
|
|
|
+/* ------------------------------------------------------------------------- */
|
|
|
+/* USB Type-C ports */
|
|
|
+
|
|
|
+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 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->cap->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->cap->try_role(port->cap, 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->cap->type != TYPEC_PORT_DRP) {
|
|
|
+ dev_dbg(dev, "data role swap only supported with DRP ports\n");
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!port->cap->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;
|
|
|
+
|
|
|
+ ret = port->cap->dr_set(port->cap, ret);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ return size;
|
|
|
+}
|
|
|
+
|
|
|
+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->type == TYPEC_PORT_DRP)
|
|
|
+ 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 = size;
|
|
|
+
|
|
|
+ if (!port->cap->pd_revision) {
|
|
|
+ dev_dbg(dev, "USB Power Delivery not supported\n");
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!port->cap->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;
|
|
|
+
|
|
|
+ ret = port->cap->pr_set(port->cap, ret);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ return size;
|
|
|
+}
|
|
|
+
|
|
|
+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 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->cap->vconn_set) {
|
|
|
+ dev_dbg(dev, "VCONN swapping not supported\n");
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = kstrtobool(buf, &source);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = port->cap->vconn_set(port->cap, (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)
|
|
|
+{
|
|
|
+ struct typec_port *p = to_typec_port(dev);
|
|
|
+
|
|
|
+ return sprintf(buf, "%d\n", (p->cap->pd_revision >> 8) & 0xff);
|
|
|
+}
|
|
|
+static DEVICE_ATTR_RO(usb_power_delivery_revision);
|
|
|
+
|
|
|
+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,
|
|
|
+ NULL,
|
|
|
+};
|
|
|
+ATTRIBUTE_GROUPS(typec);
|
|
|
+
|
|
|
+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);
|
|
|
+ kfree(port);
|
|
|
+}
|
|
|
+
|
|
|
+static 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 */
|
|
|
+
|
|
|
+/**
|
|
|
+ * 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)
|
|
|
+{
|
|
|
+ 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);
|
|
|
+}
|
|
|
+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_pwr_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)
|
|
|
+{
|
|
|
+ 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);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
|
|
|
+
|
|
|
+/* --------------------------------------- */
|
|
|
+
|
|
|
+/**
|
|
|
+ * 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 NULL on failure.
|
|
|
+ */
|
|
|
+struct typec_altmode *
|
|
|
+typec_port_register_altmode(struct typec_port *port,
|
|
|
+ struct typec_altmode_desc *desc)
|
|
|
+{
|
|
|
+ return typec_register_altmode(&port->dev, desc);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_port_register_altmode);
|
|
|
+
|
|
|
+/**
|
|
|
+ * typec_register_port - Register a USB Type-C Port
|
|
|
+ * @parent: Parent device
|
|
|
+ * @cap: Description of the port
|
|
|
+ *
|
|
|
+ * Registers a device for USB Type-C Port described in @cap.
|
|
|
+ *
|
|
|
+ * Returns handle to the port on success or NULL on failure.
|
|
|
+ */
|
|
|
+struct typec_port *typec_register_port(struct device *parent,
|
|
|
+ const struct typec_capability *cap)
|
|
|
+{
|
|
|
+ struct typec_port *port;
|
|
|
+ int role;
|
|
|
+ int ret;
|
|
|
+ int id;
|
|
|
+
|
|
|
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
|
|
|
+ if (!port)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
|
|
|
+ if (id < 0) {
|
|
|
+ kfree(port);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (cap->type == TYPEC_PORT_DFP)
|
|
|
+ role = TYPEC_SOURCE;
|
|
|
+ else if (cap->type == TYPEC_PORT_UFP)
|
|
|
+ role = TYPEC_SINK;
|
|
|
+ else
|
|
|
+ role = cap->prefer_role;
|
|
|
+
|
|
|
+ if (role == TYPEC_SOURCE) {
|
|
|
+ port->data_role = TYPEC_HOST;
|
|
|
+ port->pwr_role = TYPEC_SOURCE;
|
|
|
+ port->vconn_role = TYPEC_SOURCE;
|
|
|
+ } else {
|
|
|
+ port->data_role = TYPEC_DEVICE;
|
|
|
+ port->pwr_role = TYPEC_SINK;
|
|
|
+ port->vconn_role = TYPEC_SINK;
|
|
|
+ }
|
|
|
+
|
|
|
+ port->id = id;
|
|
|
+ port->cap = cap;
|
|
|
+ port->prefer_role = cap->prefer_role;
|
|
|
+
|
|
|
+ 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);
|
|
|
+
|
|
|
+ ret = device_register(&port->dev);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(parent, "failed to register port (%d)\n", ret);
|
|
|
+ put_device(&port->dev);
|
|
|
+ return NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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 (port)
|
|
|
+ device_unregister(&port->dev);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(typec_unregister_port);
|
|
|
+
|
|
|
+static int __init typec_init(void)
|
|
|
+{
|
|
|
+ typec_class = class_create(THIS_MODULE, "typec");
|
|
|
+ return PTR_ERR_OR_ZERO(typec_class);
|
|
|
+}
|
|
|
+subsys_initcall(typec_init);
|
|
|
+
|
|
|
+static void __exit typec_exit(void)
|
|
|
+{
|
|
|
+ class_destroy(typec_class);
|
|
|
+ ida_destroy(&typec_index_ida);
|
|
|
+}
|
|
|
+module_exit(typec_exit);
|
|
|
+
|
|
|
+MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
|
|
|
+MODULE_LICENSE("GPL v2");
|
|
|
+MODULE_DESCRIPTION("USB Type-C Connector Class");
|
Heikki Krogerus