source "drivers/usb/gadget/Kconfig"
+source "drivers/usb/typec/Kconfig"
+
source "drivers/usb/roles/Kconfig"
config USB_LED_TRIG
obj-$(CONFIG_USBIP_CORE) += usbip/
+obj-y += typec/
+
obj-y += roles/
--- /dev/null
+
+menuconfig TYPEC
+ tristate "USB Type-C Support"
+ help
+ USB Type-C Specification defines a cable and connector for USB where
+ only one type of plug is supported on both ends, i.e. there will not
+ be Type-A plug on one end of the cable and Type-B plug on the other.
+ Determination of the host-to-device relationship happens through a
+ specific Configuration Channel (CC) which goes through the USB Type-C
+ cable. The Configuration Channel may also be used to detect optional
+ Accessory Modes - Analog Audio and Debug - and if USB Power Delivery
+ is supported, the Alternate Modes, where the connector is used for
+ something else then USB communication.
+
+ USB Power Delivery Specification defines a protocol that can be used
+ to negotiate the voltage and current levels with the connected
+ partners. USB Power Delivery allows higher voltages then the normal
+ 5V, up to 20V, and current up to 5A over the cable. The USB Power
+ Delivery protocol is also used to negotiate the optional Alternate
+ Modes when they are supported. USB Power Delivery does not depend on
+ USB Type-C connector, however it is mostly used together with USB
+ Type-C connectors.
+
+ USB Type-C and USB Power Delivery Specifications define a set of state
+ machines that need to be implemented in either software or firmware.
+ Simple USB Type-C PHYs, for example USB Type-C Port Controller
+ Interface Specification compliant "Port Controllers" need the state
+ machines to be handled in the OS, but stand-alone USB Type-C and Power
+ Delivery controllers handle the state machines inside their firmware.
+ The USB Type-C and Power Delivery controllers usually function
+ autonomously, and do not necessarily require drivers.
+
+ Enable this configurations option if you have USB Type-C connectors on
+ your system and 1) you know your USB Type-C hardware requires OS
+ control (a driver) to function, or 2) if you need to be able to read
+ the status of the USB Type-C ports in your system, or 3) if you need
+ to be able to swap the power role (decide are you supplying or
+ consuming power over the cable) or data role (host or device) when
+ both roles are supported.
+
+ For more information, see the kernel documentation for USB Type-C
+ Connector Class API (Documentation/driver-api/usb/typec.rst)
+ <https://www.kernel.org/doc/html/latest/driver-api/usb/typec.html>
+ and ABI (Documentation/ABI/testing/sysfs-class-typec).
+
+if TYPEC
+
+config TYPEC_TCPM
+ tristate "USB Type-C Port Controller Manager"
+ depends on USB
+ select USB_ROLE_SWITCH
+ select POWER_SUPPLY
+ help
+ The Type-C Port Controller Manager provides a USB PD and USB Type-C
+ state machine for use with Type-C Port Controllers.
+
+if TYPEC_TCPM
+
+config TYPEC_TCPCI
+ tristate "Type-C Port Controller Interface driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Type-C Port Controller driver for TCPCI-compliant controller.
+
+config TYPEC_RT1711H
+ tristate "Richtek RT1711H Type-C chip driver"
+ depends on I2C
+ select TYPEC_TCPCI
+ help
+ Richtek RT1711H Type-C chip driver that works with
+ Type-C Port Controller Manager to provide USB PD and USB
+ Type-C functionalities.
+
+source "drivers/usb/typec/fusb302/Kconfig"
+
+config TYPEC_WCOVE
+ tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver"
+ depends on ACPI
+ depends on INTEL_SOC_PMIC
+ depends on INTEL_PMC_IPC
+ depends on BXT_WC_PMIC_OPREGION
+ help
+ This driver adds support for USB Type-C detection on Intel Broxton
+ platforms that have Intel Whiskey Cove PMIC. The driver can detect the
+ role and cable orientation.
+
+ To compile this driver as module, choose M here: the module will be
+ called typec_wcove
+
+endif # TYPEC_TCPM
+
+
+config TYPEC_TPS6598X
+ tristate "TI TPS6598x USB Power Delivery controller driver"
+ depends on I2C
+ help
+ Say Y or M here if your system has TI TPS65982 or TPS65983 USB Power
+ Delivery controller.
+
+ If you choose to build this driver as a dynamically linked module, the
+ module will be called tps6598x.ko.
+
+
+endif # TYPEC
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0
+obj-y += typec.o
+typec-y := class.o mux.o bus.o
+obj-y += tcpm.o
+obj-y += fusb302/
+obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o
+obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * Bus for USB Type-C Alternate Modes
+ *
+ * Copyright (C) 2018 Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/usb/pd_vdo.h>
+
+#include "bus.h"
+
+static inline int typec_altmode_set_mux(struct altmode *alt, u8 state)
+{
+ return alt->mux ? alt->mux->set(alt->mux, state) : 0;
+}
+
+static int typec_altmode_set_state(struct typec_altmode *adev, int state)
+{
+ bool is_port = is_typec_port(adev->dev.parent);
+ struct altmode *port_altmode;
+ int ret;
+
+ port_altmode = is_port ? to_altmode(adev) : to_altmode(adev)->partner;
+
+ ret = typec_altmode_set_mux(port_altmode, state);
+ if (ret)
+ return ret;
+
+ blocking_notifier_call_chain(&port_altmode->nh, state, NULL);
+
+ return 0;
+}
+
+/* -------------------------------------------------------------------------- */
+/* Common API */
+
+/**
+ * typec_altmode_notify - Communication between the OS and alternate mode driver
+ * @adev: Handle to the alternate mode
+ * @conf: Alternate mode specific configuration value
+ * @data: Alternate mode specific data
+ *
+ * The primary purpose for this function is to allow the alternate mode drivers
+ * to tell which pin configuration has been negotiated with the partner. That
+ * information will then be used for example to configure the muxes.
+ * Communication to the other direction is also possible, and low level device
+ * drivers can also send notifications to the alternate mode drivers. The actual
+ * communication will be specific for every SVID.
+ */
+int typec_altmode_notify(struct typec_altmode *adev,
+ unsigned long conf, void *data)
+{
+ bool is_port;
+ struct altmode *altmode;
+ struct altmode *partner;
+ int ret;
+
+ if (!adev)
+ return 0;
+
+ altmode = to_altmode(adev);
+
+ if (!altmode->partner)
+ return -ENODEV;
+
+ is_port = is_typec_port(adev->dev.parent);
+ partner = altmode->partner;
+
+ ret = typec_altmode_set_mux(is_port ? altmode : partner, (u8)conf);
+ if (ret)
+ return ret;
+
+ blocking_notifier_call_chain(is_port ? &altmode->nh : &partner->nh,
+ conf, data);
+
+ if (partner->adev.ops && partner->adev.ops->notify)
+ return partner->adev.ops->notify(&partner->adev, conf, data);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_altmode_notify);
+
+/**
+ * typec_altmode_enter - Enter Mode
+ * @adev: The alternate mode
+ *
+ * The alternate mode drivers use this function to enter mode. The port drivers
+ * use this to inform the alternate mode drivers that the partner has initiated
+ * Enter Mode command.
+ */
+int typec_altmode_enter(struct typec_altmode *adev)
+{
+ struct altmode *partner = to_altmode(adev)->partner;
+ struct typec_altmode *pdev = &partner->adev;
+ int ret;
+
+ if (!adev || adev->active)
+ return 0;
+
+ if (!pdev->ops || !pdev->ops->enter)
+ return -EOPNOTSUPP;
+
+ /* Moving to USB Safe State */
+ ret = typec_altmode_set_state(adev, TYPEC_STATE_SAFE);
+ if (ret)
+ return ret;
+
+ /* Enter Mode */
+ return pdev->ops->enter(pdev);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_enter);
+
+/**
+ * typec_altmode_exit - Exit Mode
+ * @adev: The alternate mode
+ *
+ * The partner of @adev has initiated Exit Mode command.
+ */
+int typec_altmode_exit(struct typec_altmode *adev)
+{
+ struct altmode *partner = to_altmode(adev)->partner;
+ struct typec_altmode *pdev = &partner->adev;
+ int ret;
+
+ if (!adev || !adev->active)
+ return 0;
+
+ if (!pdev->ops || !pdev->ops->enter)
+ return -EOPNOTSUPP;
+
+ /* Moving to USB Safe State */
+ ret = typec_altmode_set_state(adev, TYPEC_STATE_SAFE);
+ if (ret)
+ return ret;
+
+ /* Exit Mode command */
+ return pdev->ops->exit(pdev);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_exit);
+
+/**
+ * typec_altmode_attention - Attention command
+ * @adev: The alternate mode
+ * @vdo: VDO for the Attention command
+ *
+ * Notifies the partner of @adev about Attention command.
+ */
+void typec_altmode_attention(struct typec_altmode *adev, u32 vdo)
+{
+ struct typec_altmode *pdev = &to_altmode(adev)->partner->adev;
+
+ if (pdev->ops && pdev->ops->attention)
+ pdev->ops->attention(pdev, vdo);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_attention);
+
+/**
+ * typec_altmode_vdm - Send Vendor Defined Messages (VDM) to the partner
+ * @adev: Alternate mode handle
+ * @header: VDM Header
+ * @vdo: Array of Vendor Defined Data Objects
+ * @count: Number of Data Objects
+ *
+ * The alternate mode drivers use this function for SVID specific communication
+ * with the partner. The port drivers use it to deliver the Structured VDMs
+ * received from the partners to the alternate mode drivers.
+ */
+int typec_altmode_vdm(struct typec_altmode *adev,
+ const u32 header, const u32 *vdo, int count)
+{
+ struct typec_altmode *pdev;
+ struct altmode *altmode;
+
+ if (!adev)
+ return 0;
+
+ altmode = to_altmode(adev);
+
+ if (!altmode->partner)
+ return -ENODEV;
+
+ pdev = &altmode->partner->adev;
+
+ if (!pdev->ops || !pdev->ops->vdm)
+ return -EOPNOTSUPP;
+
+ return pdev->ops->vdm(pdev, header, vdo, count);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_vdm);
+
+const struct typec_altmode *
+typec_altmode_get_partner(struct typec_altmode *adev)
+{
+ return &to_altmode(adev)->partner->adev;
+}
+EXPORT_SYMBOL_GPL(typec_altmode_get_partner);
+
+/* -------------------------------------------------------------------------- */
+/* API for the alternate mode drivers */
+
+/**
+ * typec_altmode_get_plug - Find cable plug alternate mode
+ * @adev: Handle to partner alternate mode
+ * @index: Cable plug index
+ *
+ * Increment reference count for cable plug alternate mode device. Returns
+ * handle to the cable plug alternate mode, or NULL if none is found.
+ */
+struct typec_altmode *typec_altmode_get_plug(struct typec_altmode *adev,
+ enum typec_plug_index index)
+{
+ struct altmode *port = to_altmode(adev)->partner;
+
+ if (port->plug[index]) {
+ get_device(&port->plug[index]->adev.dev);
+ return &port->plug[index]->adev;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(typec_altmode_get_plug);
+
+/**
+ * typec_altmode_put_plug - Decrement cable plug alternate mode reference count
+ * @plug: Handle to the cable plug alternate mode
+ */
+void typec_altmode_put_plug(struct typec_altmode *plug)
+{
+ if (plug)
+ put_device(&plug->dev);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_put_plug);
+
+int __typec_altmode_register_driver(struct typec_altmode_driver *drv,
+ struct module *module)
+{
+ if (!drv->probe)
+ return -EINVAL;
+
+ drv->driver.owner = module;
+ drv->driver.bus = &typec_bus;
+
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(__typec_altmode_register_driver);
+
+void typec_altmode_unregister_driver(struct typec_altmode_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_unregister_driver);
+
+/* -------------------------------------------------------------------------- */
+/* API for the port drivers */
+
+/**
+ * typec_match_altmode - Match SVID and mode to an array of alternate modes
+ * @altmodes: Array of alternate modes
+ * @n: Number of elements in the array, or -1 for NULL terminated arrays
+ * @svid: Standard or Vendor ID to match with
+ * @mode: Mode to match with
+ *
+ * Return pointer to an alternate mode with SVID matching @svid, or NULL when no
+ * match is found.
+ */
+struct typec_altmode *typec_match_altmode(struct typec_altmode **altmodes,
+ size_t n, u16 svid, u8 mode)
+{
+ int i;
+
+ for (i = 0; i < n; i++) {
+ if (!altmodes[i])
+ break;
+ if (altmodes[i]->svid == svid && altmodes[i]->mode == mode)
+ return altmodes[i];
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(typec_match_altmode);
+
+/* -------------------------------------------------------------------------- */
+
+static ssize_t
+description_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *alt = to_typec_altmode(dev);
+
+ return sprintf(buf, "%s\n", alt->desc ? alt->desc : "");
+}
+static DEVICE_ATTR_RO(description);
+
+static struct attribute *typec_attrs[] = {
+ &dev_attr_description.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(typec);
+
+static int typec_match(struct device *dev, struct device_driver *driver)
+{
+ struct typec_altmode_driver *drv = to_altmode_driver(driver);
+ struct typec_altmode *altmode = to_typec_altmode(dev);
+ const struct typec_device_id *id;
+
+ for (id = drv->id_table; id->svid; id++)
+ if (id->svid == altmode->svid &&
+ (id->mode == TYPEC_ANY_MODE || id->mode == altmode->mode))
+ return 1;
+ return 0;
+}
+
+static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct typec_altmode *altmode = to_typec_altmode(dev);
+
+ if (add_uevent_var(env, "SVID=%04X", altmode->svid))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MODE=%u", altmode->mode))
+ return -ENOMEM;
+
+ return add_uevent_var(env, "MODALIAS=typec:id%04Xm%02X",
+ altmode->svid, altmode->mode);
+}
+
+static int typec_altmode_create_links(struct altmode *alt)
+{
+ struct device *port_dev = &alt->partner->adev.dev;
+ struct device *dev = &alt->adev.dev;
+ int err;
+
+ err = sysfs_create_link(&dev->kobj, &port_dev->kobj, "port");
+ if (err)
+ return err;
+
+ err = sysfs_create_link(&port_dev->kobj, &dev->kobj, "partner");
+ if (err)
+ sysfs_remove_link(&dev->kobj, "port");
+
+ return err;
+}
+
+static void typec_altmode_remove_links(struct altmode *alt)
+{
+ sysfs_remove_link(&alt->partner->adev.dev.kobj, "partner");
+ sysfs_remove_link(&alt->adev.dev.kobj, "port");
+}
+
+static int typec_probe(struct device *dev)
+{
+ struct typec_altmode_driver *drv = to_altmode_driver(dev->driver);
+ struct typec_altmode *adev = to_typec_altmode(dev);
+ struct altmode *altmode = to_altmode(adev);
+ int ret;
+
+ /* Fail if the port does not support the alternate mode */
+ if (!altmode->partner)
+ return -ENODEV;
+
+ ret = typec_altmode_create_links(altmode);
+ if (ret) {
+ dev_warn(dev, "failed to create symlinks\n");
+ return ret;
+ }
+
+ ret = drv->probe(adev);
+ if (ret)
+ typec_altmode_remove_links(altmode);
+
+ return ret;
+}
+
+static int typec_remove(struct device *dev)
+{
+ struct typec_altmode_driver *drv = to_altmode_driver(dev->driver);
+ struct typec_altmode *adev = to_typec_altmode(dev);
+ struct altmode *altmode = to_altmode(adev);
+
+ typec_altmode_remove_links(altmode);
+
+ if (drv->remove)
+ drv->remove(to_typec_altmode(dev));
+
+ if (adev->active) {
+ WARN_ON(typec_altmode_set_state(adev, TYPEC_STATE_SAFE));
+ typec_altmode_update_active(adev, false);
+ }
+
+ adev->desc = NULL;
+ adev->ops = NULL;
+
+ return 0;
+}
+
+struct bus_type typec_bus = {
+ .name = "typec",
+ .dev_groups = typec_groups,
+ .match = typec_match,
+ .uevent = typec_uevent,
+ .probe = typec_probe,
+ .remove = typec_remove,
+};
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __USB_TYPEC_ALTMODE_H__
+#define __USB_TYPEC_ALTMODE_H__
+
+#include <linux/usb/typec_altmode.h>
+#include <linux/usb/typec_mux.h>
+
+struct bus_type;
+
+struct altmode {
+ unsigned int id;
+ struct typec_altmode adev;
+ struct typec_mux *mux;
+
+ enum typec_port_data roles;
+
+ struct attribute *attrs[5];
+ char group_name[8];
+ struct attribute_group group;
+ const struct attribute_group *groups[2];
+
+ struct altmode *partner;
+ struct altmode *plug[2];
+
+ struct blocking_notifier_head nh;
+};
+
+#define to_altmode(d) container_of(d, struct altmode, adev)
+
+extern struct bus_type typec_bus;
+extern const struct device_type typec_altmode_dev_type;
+extern const struct device_type typec_port_dev_type;
+
+#define is_typec_altmode(_dev_) (_dev_->type == &typec_altmode_dev_type)
+#define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
+
+#endif /* __USB_TYPEC_ALTMODE_H__ */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB Type-C Connector Class
+ *
+ * Copyright (C) 2017, Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include "bus.h"
+
+struct typec_plug {
+ struct device dev;
+ enum typec_plug_index index;
+ struct ida mode_ids;
+};
+
+struct typec_cable {
+ struct device dev;
+ enum typec_plug_type type;
+ struct usb_pd_identity *identity;
+ unsigned int active:1;
+};
+
+struct typec_partner {
+ struct device dev;
+ unsigned int usb_pd:1;
+ struct usb_pd_identity *identity;
+ enum typec_accessory accessory;
+ struct ida mode_ids;
+};
+
+struct typec_port {
+ unsigned int id;
+ struct device dev;
+ struct ida mode_ids;
+
+ int prefer_role;
+ enum typec_data_role data_role;
+ enum typec_role pwr_role;
+ enum typec_role vconn_role;
+ enum typec_pwr_opmode pwr_opmode;
+ enum typec_port_type port_type;
+ struct mutex port_type_lock;
+
+ enum typec_orientation orientation;
+ struct typec_switch *sw;
+ struct typec_mux *mux;
+
+ const struct typec_capability *cap;
+};
+
+#define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
+#define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev)
+#define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev)
+#define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev)
+
+static const struct device_type typec_partner_dev_type;
+static const struct device_type typec_cable_dev_type;
+static const struct device_type typec_plug_dev_type;
+
+#define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type)
+#define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type)
+#define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type)
+
+static DEFINE_IDA(typec_index_ida);
+static struct class *typec_class;
+
+/* ------------------------------------------------------------------------- */
+/* Common attributes */
+
+static const char * const typec_accessory_modes[] = {
+ [TYPEC_ACCESSORY_NONE] = "none",
+ [TYPEC_ACCESSORY_AUDIO] = "analog_audio",
+ [TYPEC_ACCESSORY_DEBUG] = "debug",
+};
+
+static struct usb_pd_identity *get_pd_identity(struct device *dev)
+{
+ if (is_typec_partner(dev)) {
+ struct typec_partner *partner = to_typec_partner(dev);
+
+ return partner->identity;
+ } else if (is_typec_cable(dev)) {
+ struct typec_cable *cable = to_typec_cable(dev);
+
+ return cable->identity;
+ }
+ return NULL;
+}
+
+static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->id_header);
+}
+static DEVICE_ATTR_RO(id_header);
+
+static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->cert_stat);
+}
+static DEVICE_ATTR_RO(cert_stat);
+
+static ssize_t product_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sprintf(buf, "0x%08x\n", id->product);
+}
+static DEVICE_ATTR_RO(product);
+
+static struct attribute *usb_pd_id_attrs[] = {
+ &dev_attr_id_header.attr,
+ &dev_attr_cert_stat.attr,
+ &dev_attr_product.attr,
+ NULL
+};
+
+static const struct attribute_group usb_pd_id_group = {
+ .name = "identity",
+ .attrs = usb_pd_id_attrs,
+};
+
+static const struct attribute_group *usb_pd_id_groups[] = {
+ &usb_pd_id_group,
+ NULL,
+};
+
+static void typec_report_identity(struct device *dev)
+{
+ sysfs_notify(&dev->kobj, "identity", "id_header");
+ sysfs_notify(&dev->kobj, "identity", "cert_stat");
+ sysfs_notify(&dev->kobj, "identity", "product");
+}
+
+/* ------------------------------------------------------------------------- */
+/* Alternate Modes */
+
+static int altmode_match(struct device *dev, void *data)
+{
+ struct typec_altmode *adev = to_typec_altmode(dev);
+ struct typec_device_id *id = data;
+
+ if (!is_typec_altmode(dev))
+ return 0;
+
+ return ((adev->svid == id->svid) && (adev->mode == id->mode));
+}
+
+static void typec_altmode_set_partner(struct altmode *altmode)
+{
+ struct typec_altmode *adev = &altmode->adev;
+ struct typec_device_id id = { adev->svid, adev->mode, };
+ struct typec_port *port = typec_altmode2port(adev);
+ struct altmode *partner;
+ struct device *dev;
+
+ dev = device_find_child(&port->dev, &id, altmode_match);
+ if (!dev)
+ return;
+
+ /* Bind the port alt mode to the partner/plug alt mode. */
+ partner = to_altmode(to_typec_altmode(dev));
+ altmode->partner = partner;
+
+ /* Bind the partner/plug alt mode to the port alt mode. */
+ if (is_typec_plug(adev->dev.parent)) {
+ struct typec_plug *plug = to_typec_plug(adev->dev.parent);
+
+ partner->plug[plug->index] = altmode;
+ } else {
+ partner->partner = altmode;
+ }
+}
+
+static void typec_altmode_put_partner(struct altmode *altmode)
+{
+ struct altmode *partner = altmode->partner;
+ struct typec_altmode *adev;
+
+ if (!partner)
+ return;
+
+ adev = &partner->adev;
+
+ if (is_typec_plug(adev->dev.parent)) {
+ struct typec_plug *plug = to_typec_plug(adev->dev.parent);
+
+ partner->plug[plug->index] = NULL;
+ } else {
+ partner->partner = NULL;
+ }
+ put_device(&adev->dev);
+}
+
+static int __typec_port_match(struct device *dev, const void *name)
+{
+ return !strcmp((const char *)name, dev_name(dev));
+}
+
+static void *typec_port_match(struct device_connection *con, int ep, void *data)
+{
+ return class_find_device(typec_class, NULL, con->endpoint[ep],
+ __typec_port_match);
+}
+
+struct typec_altmode *
+typec_altmode_register_notifier(struct device *dev, u16 svid, u8 mode,
+ struct notifier_block *nb)
+{
+ struct typec_device_id id = { svid, mode, };
+ struct device *altmode_dev;
+ struct device *port_dev;
+ struct altmode *altmode;
+ int ret;
+
+ /* Find the port linked to the caller */
+ port_dev = device_connection_find_match(dev, NULL, NULL,
+ typec_port_match);
+ if (IS_ERR_OR_NULL(port_dev))
+ return port_dev ? ERR_CAST(port_dev) : ERR_PTR(-ENODEV);
+
+ /* Find the altmode with matching svid */
+ altmode_dev = device_find_child(port_dev, &id, altmode_match);
+
+ put_device(port_dev);
+
+ if (!altmode_dev)
+ return ERR_PTR(-ENODEV);
+
+ altmode = to_altmode(to_typec_altmode(altmode_dev));
+
+ /* Register notifier */
+ ret = blocking_notifier_chain_register(&altmode->nh, nb);
+ if (ret) {
+ put_device(altmode_dev);
+ return ERR_PTR(ret);
+ }
+
+ return &altmode->adev;
+}
+EXPORT_SYMBOL_GPL(typec_altmode_register_notifier);
+
+void typec_altmode_unregister_notifier(struct typec_altmode *adev,
+ struct notifier_block *nb)
+{
+ struct altmode *altmode = to_altmode(adev);
+
+ blocking_notifier_chain_unregister(&altmode->nh, nb);
+ put_device(&adev->dev);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_unregister_notifier);
+
+/**
+ * typec_altmode_update_active - Report Enter/Exit mode
+ * @adev: Handle to the alternate mode
+ * @active: True when the mode has been entered
+ *
+ * If a partner or cable plug executes Enter/Exit Mode command successfully, the
+ * drivers use this routine to report the updated state of the mode.
+ */
+void typec_altmode_update_active(struct typec_altmode *adev, bool active)
+{
+ char dir[6];
+
+ if (adev->active == active)
+ return;
+
+ if (!is_typec_port(adev->dev.parent)) {
+ if (!active)
+ module_put(adev->dev.driver->owner);
+ else
+ WARN_ON(!try_module_get(adev->dev.driver->owner));
+ }
+
+ adev->active = active;
+ snprintf(dir, sizeof(dir), "mode%d", adev->mode);
+ sysfs_notify(&adev->dev.kobj, dir, "active");
+ sysfs_notify(&adev->dev.kobj, NULL, "active");
+ kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE);
+}
+EXPORT_SYMBOL_GPL(typec_altmode_update_active);
+
+/**
+ * typec_altmode2port - Alternate Mode to USB Type-C port
+ * @alt: The Alternate Mode
+ *
+ * Returns handle to the port that a cable plug or partner with @alt is
+ * connected to.
+ */
+struct typec_port *typec_altmode2port(struct typec_altmode *alt)
+{
+ if (is_typec_plug(alt->dev.parent))
+ return to_typec_port(alt->dev.parent->parent->parent);
+ if (is_typec_partner(alt->dev.parent))
+ return to_typec_port(alt->dev.parent->parent);
+ if (is_typec_port(alt->dev.parent))
+ return to_typec_port(alt->dev.parent);
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(typec_altmode2port);
+
+static ssize_t
+vdo_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *alt = to_typec_altmode(dev);
+
+ return sprintf(buf, "0x%08x\n", alt->vdo);
+}
+static DEVICE_ATTR_RO(vdo);
+
+static ssize_t
+description_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *alt = to_typec_altmode(dev);
+
+ return sprintf(buf, "%s\n", alt->desc ? alt->desc : "");
+}
+static DEVICE_ATTR_RO(description);
+
+static ssize_t
+active_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *alt = to_typec_altmode(dev);
+
+ return sprintf(buf, "%s\n", alt->active ? "yes" : "no");
+}
+
+static ssize_t active_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct typec_altmode *adev = to_typec_altmode(dev);
+ struct altmode *altmode = to_altmode(adev);
+ bool enter;
+ int ret;
+
+ ret = kstrtobool(buf, &enter);
+ if (ret)
+ return ret;
+
+ if (adev->active == enter)
+ return size;
+
+ if (is_typec_port(adev->dev.parent)) {
+ typec_altmode_update_active(adev, enter);
+
+ /* Make sure that the partner exits the mode before disabling */
+ if (altmode->partner && !enter && altmode->partner->adev.active)
+ typec_altmode_exit(&altmode->partner->adev);
+ } else if (altmode->partner) {
+ if (enter && !altmode->partner->adev.active) {
+ dev_warn(dev, "port has the mode disabled\n");
+ return -EPERM;
+ }
+ }
+
+ /* Note: If there is no driver, the mode will not be entered */
+ if (adev->ops && adev->ops->activate) {
+ ret = adev->ops->activate(adev, enter);
+ if (ret)
+ return ret;
+ }
+
+ return size;
+}
+static DEVICE_ATTR_RW(active);
+
+static ssize_t
+supported_roles_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct altmode *alt = to_altmode(to_typec_altmode(dev));
+ ssize_t ret;
+
+ switch (alt->roles) {
+ case TYPEC_PORT_SRC:
+ ret = sprintf(buf, "source\n");
+ break;
+ case TYPEC_PORT_SNK:
+ ret = sprintf(buf, "sink\n");
+ break;
+ case TYPEC_PORT_DRP:
+ default:
+ ret = sprintf(buf, "source sink\n");
+ break;
+ }
+ return ret;
+}
+static DEVICE_ATTR_RO(supported_roles);
+
+static ssize_t
+mode_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *adev = to_typec_altmode(dev);
+
+ return sprintf(buf, "%u\n", adev->mode);
+}
+static DEVICE_ATTR_RO(mode);
+
+static ssize_t
+svid_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct typec_altmode *adev = to_typec_altmode(dev);
+
+ return sprintf(buf, "%04x\n", adev->svid);
+}
+static DEVICE_ATTR_RO(svid);
+
+static struct attribute *typec_altmode_attrs[] = {
+ &dev_attr_active.attr,
+ &dev_attr_mode.attr,
+ &dev_attr_svid.attr,
+ &dev_attr_vdo.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(typec_altmode);
+
+static int altmode_id_get(struct device *dev)
+{
+ struct ida *ids;
+
+ if (is_typec_partner(dev))
+ ids = &to_typec_partner(dev)->mode_ids;
+ else if (is_typec_plug(dev))
+ ids = &to_typec_plug(dev)->mode_ids;
+ else
+ ids = &to_typec_port(dev)->mode_ids;
+
+ return ida_simple_get(ids, 0, 0, GFP_KERNEL);
+}
+
+static void altmode_id_remove(struct device *dev, int id)
+{
+ struct ida *ids;
+
+ if (is_typec_partner(dev))
+ ids = &to_typec_partner(dev)->mode_ids;
+ else if (is_typec_plug(dev))
+ ids = &to_typec_plug(dev)->mode_ids;
+ else
+ ids = &to_typec_port(dev)->mode_ids;
+
+ ida_simple_remove(ids, id);
+}
+
+static void typec_altmode_release(struct device *dev)
+{
+ struct altmode *alt = to_altmode(to_typec_altmode(dev));
+
+ typec_altmode_put_partner(alt);
+
+ altmode_id_remove(alt->adev.dev.parent, alt->id);
+ kfree(alt);
+}
+
+const struct device_type typec_altmode_dev_type = {
+ .name = "typec_alternate_mode",
+ .groups = typec_altmode_groups,
+ .release = typec_altmode_release,
+};
+
+static struct typec_altmode *
+typec_register_altmode(struct device *parent,
+ const struct typec_altmode_desc *desc)
+{
+ unsigned int id = altmode_id_get(parent);
+ bool is_port = is_typec_port(parent);
+ struct altmode *alt;
+ int ret;
+
+ alt = kzalloc(sizeof(*alt), GFP_KERNEL);
+ if (!alt)
+ 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)
+ BLOCKING_INIT_NOTIFIER_HEAD(&alt->nh);
+ else
+ typec_altmode_set_partner(alt);
+
+ /* The partners are bind to drivers */
+ if (is_typec_partner(parent))
+ alt->adev.dev.bus = &typec_bus;
+
+ ret = device_register(&alt->adev.dev);
+ if (ret) {
+ dev_err(parent, "failed to register alternate mode (%d)\n",
+ ret);
+ put_device(&alt->adev.dev);
+ return ERR_PTR(ret);
+ }
+
+ return &alt->adev;
+}
+
+/**
+ * typec_unregister_altmode - Unregister Alternate Mode
+ * @adev: The alternate mode to be unregistered
+ *
+ * Unregister device created with typec_partner_register_altmode(),
+ * typec_plug_register_altmode() or typec_port_register_altmode().
+ */
+void typec_unregister_altmode(struct typec_altmode *adev)
+{
+ if (IS_ERR_OR_NULL(adev))
+ return;
+ typec_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 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);
+
+ 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_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,
+ const 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 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;
+
+ 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 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 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->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 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 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;
+
+ 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_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->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->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->cap->dr_set(port->cap, 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->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;
+
+ 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->cap->pr_set(port->cap, 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->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
+ 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->cap->port_type_set(port->cap, 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->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,
+ &dev_attr_port_type.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);
+ ida_destroy(&port->mode_ids);
+ typec_switch_put(port->sw);
+ typec_mux_put(port->mux);
+ 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 */
+
+/**
+ * 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);
+
+static int partner_match(struct device *dev, void *data)
+{
+ return is_typec_partner(dev);
+}
+
+/**
+ * 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");
+ }
+ put_device(partner_dev);
+ }
+}
+EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
+
+/**
+ * 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;
+
+ if (port->sw) {
+ ret = port->sw->set(port->sw, orientation);
+ if (ret)
+ return ret;
+ }
+
+ port->orientation = orientation;
+
+ 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)
+{
+ return port->mux ? port->mux->set(port->mux, mode) : 0;
+}
+EXPORT_SYMBOL_GPL(typec_set_mode);
+
+/* --------------------------------------- */
+
+/**
+ * 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;
+ char id[10];
+
+ sprintf(id, "id%04xm%02x", desc->svid, desc->mode);
+
+ mux = typec_mux_get(&port->dev, id);
+ 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);
+
+/**
+ * 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->cap = cap;
+ 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);
+
+ port->sw = typec_switch_get(&port->dev);
+ if (IS_ERR(port->sw)) {
+ put_device(&port->dev);
+ return ERR_CAST(port->sw);
+ }
+
+ port->mux = typec_mux_get(&port->dev, "typec-mux");
+ if (IS_ERR(port->mux)) {
+ put_device(&port->dev);
+ return ERR_CAST(port->mux);
+ }
+
+ 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;
+
+ typec_class = class_create(THIS_MODULE, "typec");
+ if (IS_ERR(typec_class)) {
+ bus_unregister(&typec_bus);
+ return PTR_ERR(typec_class);
+ }
+
+ return 0;
+}
+subsys_initcall(typec_init);
+
+static void __exit typec_exit(void)
+{
+ class_destroy(typec_class);
+ ida_destroy(&typec_index_ida);
+ bus_unregister(&typec_bus);
+}
+module_exit(typec_exit);
+
+MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("USB Type-C Connector Class");
--- /dev/null
+config TYPEC_FUSB302
+ tristate "Fairchild FUSB302 Type-C chip driver"
+ depends on I2C
+ help
+ The Fairchild FUSB302 Type-C chip driver that works with
+ Type-C Port Controller Manager to provide USB PD and USB
+ Type-C functionalities.
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0
+obj-y += fusb302.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2016-2017 Google, Inc
+ *
+ * Fairchild FUSB302 Type-C Chip Driver
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/extcon.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/proc_fs.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/usb/typec.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/pd.h>
+#include <linux/workqueue.h>
+
+#include "fusb302_reg.h"
+
+/*
+ * When the device is SNK, BC_LVL interrupt is used to monitor cc pins
+ * for the current capability offered by the SRC. As FUSB302 chip fires
+ * the BC_LVL interrupt on PD signalings, cc lvl should be handled after
+ * a delay to avoid measuring on PD activities. The delay is slightly
+ * longer than PD_T_PD_DEBPUNCE (10-20ms).
+ */
+#define T_BC_LVL_DEBOUNCE_DELAY_MS 30
+
+enum toggling_mode {
+ TOGGLINE_MODE_OFF,
+ TOGGLING_MODE_DRP,
+ TOGGLING_MODE_SNK,
+ TOGGLING_MODE_SRC,
+};
+
+static const char * const toggling_mode_name[] = {
+ [TOGGLINE_MODE_OFF] = "toggling_OFF",
+ [TOGGLING_MODE_DRP] = "toggling_DRP",
+ [TOGGLING_MODE_SNK] = "toggling_SNK",
+ [TOGGLING_MODE_SRC] = "toggling_SRC",
+};
+
+enum src_current_status {
+ SRC_CURRENT_DEFAULT,
+ SRC_CURRENT_MEDIUM,
+ SRC_CURRENT_HIGH,
+};
+
+static const u8 ra_mda_value[] = {
+ [SRC_CURRENT_DEFAULT] = 4, /* 210mV */
+ [SRC_CURRENT_MEDIUM] = 9, /* 420mV */
+ [SRC_CURRENT_HIGH] = 18, /* 798mV */
+};
+
+static const u8 rd_mda_value[] = {
+ [SRC_CURRENT_DEFAULT] = 38, /* 1638mV */
+ [SRC_CURRENT_MEDIUM] = 38, /* 1638mV */
+ [SRC_CURRENT_HIGH] = 61, /* 2604mV */
+};
+
+#define LOG_BUFFER_ENTRIES 1024
+#define LOG_BUFFER_ENTRY_SIZE 128
+
+struct fusb302_chip {
+ struct device *dev;
+ struct i2c_client *i2c_client;
+ struct tcpm_port *tcpm_port;
+ struct tcpc_dev tcpc_dev;
+ struct tcpc_config tcpc_config;
+
+ struct regulator *vbus;
+
+ int gpio_int_n;
+ int gpio_int_n_irq;
+ struct extcon_dev *extcon;
+
+ struct workqueue_struct *wq;
+ struct delayed_work bc_lvl_handler;
+
+ atomic_t pm_suspend;
+ atomic_t i2c_busy;
+
+ /* lock for sharing chip states */
+ struct mutex lock;
+
+ /* chip status */
+ enum toggling_mode toggling_mode;
+ enum src_current_status src_current_status;
+ bool intr_togdone;
+ bool intr_bc_lvl;
+ bool intr_comp_chng;
+
+ /* port status */
+ bool pull_up;
+ bool vconn_on;
+ bool vbus_on;
+ bool charge_on;
+ bool vbus_present;
+ enum typec_cc_polarity cc_polarity;
+ enum typec_cc_status cc1;
+ enum typec_cc_status cc2;
+ u32 snk_pdo[PDO_MAX_OBJECTS];
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *dentry;
+ /* lock for log buffer access */
+ struct mutex logbuffer_lock;
+ int logbuffer_head;
+ int logbuffer_tail;
+ u8 *logbuffer[LOG_BUFFER_ENTRIES];
+#endif
+};
+
+/*
+ * Logging
+ */
+#ifdef CONFIG_DEBUG_FS
+
+static bool fusb302_log_full(struct fusb302_chip *chip)
+{
+ return chip->logbuffer_tail ==
+ (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+}
+
+static void _fusb302_log(struct fusb302_chip *chip, const char *fmt,
+ va_list args)
+{
+ char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
+ u64 ts_nsec = local_clock();
+ unsigned long rem_nsec;
+
+ if (!chip->logbuffer[chip->logbuffer_head]) {
+ chip->logbuffer[chip->logbuffer_head] =
+ kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
+ if (!chip->logbuffer[chip->logbuffer_head])
+ return;
+ }
+
+ vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
+
+ mutex_lock(&chip->logbuffer_lock);
+
+ if (fusb302_log_full(chip)) {
+ chip->logbuffer_head = max(chip->logbuffer_head - 1, 0);
+ strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer));
+ }
+
+ if (chip->logbuffer_head < 0 ||
+ chip->logbuffer_head >= LOG_BUFFER_ENTRIES) {
+ dev_warn(chip->dev,
+ "Bad log buffer index %d\n", chip->logbuffer_head);
+ goto abort;
+ }
+
+ if (!chip->logbuffer[chip->logbuffer_head]) {
+ dev_warn(chip->dev,
+ "Log buffer index %d is NULL\n", chip->logbuffer_head);
+ goto abort;
+ }
+
+ rem_nsec = do_div(ts_nsec, 1000000000);
+ scnprintf(chip->logbuffer[chip->logbuffer_head],
+ LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
+ (unsigned long)ts_nsec, rem_nsec / 1000,
+ tmpbuffer);
+ chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+
+abort:
+ mutex_unlock(&chip->logbuffer_lock);
+}
+
+static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ _fusb302_log(chip, fmt, args);
+ va_end(args);
+}
+
+static int fusb302_debug_show(struct seq_file *s, void *v)
+{
+ struct fusb302_chip *chip = (struct fusb302_chip *)s->private;
+ int tail;
+
+ mutex_lock(&chip->logbuffer_lock);
+ tail = chip->logbuffer_tail;
+ while (tail != chip->logbuffer_head) {
+ seq_printf(s, "%s\n", chip->logbuffer[tail]);
+ tail = (tail + 1) % LOG_BUFFER_ENTRIES;
+ }
+ if (!seq_has_overflowed(s))
+ chip->logbuffer_tail = tail;
+ mutex_unlock(&chip->logbuffer_lock);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(fusb302_debug);
+
+static struct dentry *rootdir;
+
+static void fusb302_debugfs_init(struct fusb302_chip *chip)
+{
+ mutex_init(&chip->logbuffer_lock);
+ if (!rootdir)
+ rootdir = debugfs_create_dir("fusb302", NULL);
+
+ chip->dentry = debugfs_create_file(dev_name(chip->dev),
+ S_IFREG | 0444, rootdir,
+ chip, &fusb302_debug_fops);
+}
+
+static void fusb302_debugfs_exit(struct fusb302_chip *chip)
+{
+ debugfs_remove(chip->dentry);
+ debugfs_remove(rootdir);
+}
+
+#else
+
+static void fusb302_log(const struct fusb302_chip *chip,
+ const char *fmt, ...) { }
+static void fusb302_debugfs_init(const struct fusb302_chip *chip) { }
+static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { }
+
+#endif
+
+#define FUSB302_RESUME_RETRY 10
+#define FUSB302_RESUME_RETRY_SLEEP 50
+
+static bool fusb302_is_suspended(struct fusb302_chip *chip)
+{
+ int retry_cnt;
+
+ for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
+ if (atomic_read(&chip->pm_suspend)) {
+ dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n",
+ retry_cnt + 1, FUSB302_RESUME_RETRY);
+ msleep(FUSB302_RESUME_RETRY_SLEEP);
+ } else {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static int fusb302_i2c_write(struct fusb302_chip *chip,
+ u8 address, u8 data)
+{
+ int ret = 0;
+
+ atomic_set(&chip->i2c_busy, 1);
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
+ }
+
+ ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data);
+ if (ret < 0)
+ fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d",
+ data, address, ret);
+ atomic_set(&chip->i2c_busy, 0);
+
+ return ret;
+}
+
+static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
+ u8 length, const u8 *data)
+{
+ int ret = 0;
+
+ if (length <= 0)
+ return ret;
+ atomic_set(&chip->i2c_busy, 1);
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
+ }
+
+ ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address,
+ length, data);
+ if (ret < 0)
+ fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d",
+ address, length, ret);
+ atomic_set(&chip->i2c_busy, 0);
+
+ return ret;
+}
+
+static int fusb302_i2c_read(struct fusb302_chip *chip,
+ u8 address, u8 *data)
+{
+ int ret = 0;
+
+ atomic_set(&chip->i2c_busy, 1);
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
+ }
+
+ ret = i2c_smbus_read_byte_data(chip->i2c_client, address);
+ *data = (u8)ret;
+ if (ret < 0)
+ fusb302_log(chip, "cannot read %02x, ret=%d", address, ret);
+ atomic_set(&chip->i2c_busy, 0);
+
+ return ret;
+}
+
+static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
+ u8 length, u8 *data)
+{
+ int ret = 0;
+
+ if (length <= 0)
+ return ret;
+ atomic_set(&chip->i2c_busy, 1);
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address,
+ length, data);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d",
+ address, length, ret);
+ goto done;
+ }
+ if (ret != length) {
+ fusb302_log(chip, "only read %d/%d bytes from 0x%02x",
+ ret, length, address);
+ ret = -EIO;
+ }
+
+done:
+ atomic_set(&chip->i2c_busy, 0);
+
+ return ret;
+}
+
+static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address,
+ u8 mask, u8 value)
+{
+ int ret = 0;
+ u8 data;
+
+ ret = fusb302_i2c_read(chip, address, &data);
+ if (ret < 0)
+ return ret;
+ data &= ~mask;
+ data |= value;
+ ret = fusb302_i2c_write(chip, address, data);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address,
+ u8 set_bits)
+{
+ return fusb302_i2c_mask_write(chip, address, 0x00, set_bits);
+}
+
+static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address,
+ u8 clear_bits)
+{
+ return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00);
+}
+
+static int fusb302_sw_reset(struct fusb302_chip *chip)
+{
+ int ret = 0;
+
+ ret = fusb302_i2c_write(chip, FUSB_REG_RESET,
+ FUSB_REG_RESET_SW_RESET);
+ if (ret < 0)
+ fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret);
+ else
+ fusb302_log(chip, "sw reset");
+
+ return ret;
+}
+
+static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip)
+{
+ int ret = 0;
+
+ ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
+ FUSB_REG_CONTROL3_N_RETRIES_3 |
+ FUSB_REG_CONTROL3_AUTO_RETRY);
+
+ return ret;
+}
+
+/*
+ * initialize interrupt on the chip
+ * - unmasked interrupt: VBUS_OK
+ */
+static int fusb302_init_interrupt(struct fusb302_chip *chip)
+{
+ int ret = 0;
+
+ ret = fusb302_i2c_write(chip, FUSB_REG_MASK,
+ 0xFF & ~FUSB_REG_MASK_VBUSOK);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0,
+ FUSB_REG_CONTROL0_INT_MASK);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode)
+{
+ int ret = 0;
+
+ ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode);
+
+ return ret;
+}
+
+static int tcpm_init(struct tcpc_dev *dev)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+ u8 data;
+
+ ret = fusb302_sw_reset(chip);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_enable_tx_auto_retries(chip);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_init_interrupt(chip);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data);
+ if (ret < 0)
+ return ret;
+ chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK);
+ ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data);
+ if (ret < 0)
+ return ret;
+ fusb302_log(chip, "fusb302 device ID: 0x%02x", data);
+
+ return ret;
+}
+
+static int tcpm_get_vbus(struct tcpc_dev *dev)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ ret = chip->vbus_present ? 1 : 0;
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int tcpm_get_current_limit(struct tcpc_dev *dev)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int current_limit = 0;
+ unsigned long timeout;
+
+ if (!chip->extcon)
+ return 0;
+
+ /*
+ * USB2 Charger detection may still be in progress when we get here,
+ * this can take upto 600ms, wait 800ms max.
+ */
+ timeout = jiffies + msecs_to_jiffies(800);
+ do {
+ if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1)
+ current_limit = 500;
+
+ if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 ||
+ extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1)
+ current_limit = 1500;
+
+ if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1)
+ current_limit = 2000;
+
+ msleep(50);
+ } while (current_limit == 0 && time_before(jiffies, timeout));
+
+ return current_limit;
+}
+
+static int fusb302_set_cc_pull(struct fusb302_chip *chip,
+ bool pull_up, bool pull_down)
+{
+ int ret = 0;
+ u8 data = 0x00;
+ u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
+ FUSB_REG_SWITCHES0_CC2_PU_EN |
+ FUSB_REG_SWITCHES0_CC1_PD_EN |
+ FUSB_REG_SWITCHES0_CC2_PD_EN;
+
+ if (pull_up)
+ data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
+ FUSB_REG_SWITCHES0_CC1_PU_EN :
+ FUSB_REG_SWITCHES0_CC2_PU_EN;
+ if (pull_down)
+ data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
+ FUSB_REG_SWITCHES0_CC2_PD_EN;
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+ mask, data);
+ if (ret < 0)
+ return ret;
+ chip->pull_up = pull_up;
+
+ return ret;
+}
+
+static int fusb302_set_src_current(struct fusb302_chip *chip,
+ enum src_current_status status)
+{
+ int ret = 0;
+
+ chip->src_current_status = status;
+ switch (status) {
+ case SRC_CURRENT_DEFAULT:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+ FUSB_REG_CONTROL0_HOST_CUR_MASK,
+ FUSB_REG_CONTROL0_HOST_CUR_DEF);
+ break;
+ case SRC_CURRENT_MEDIUM:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+ FUSB_REG_CONTROL0_HOST_CUR_MASK,
+ FUSB_REG_CONTROL0_HOST_CUR_MED);
+ break;
+ case SRC_CURRENT_HIGH:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+ FUSB_REG_CONTROL0_HOST_CUR_MASK,
+ FUSB_REG_CONTROL0_HOST_CUR_HIGH);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static int fusb302_set_toggling(struct fusb302_chip *chip,
+ enum toggling_mode mode)
+{
+ int ret = 0;
+
+ /* first disable toggling */
+ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_TOGGLE);
+ if (ret < 0)
+ return ret;
+ /* mask interrupts for SRC or SNK */
+ ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK,
+ FUSB_REG_MASK_BC_LVL |
+ FUSB_REG_MASK_COMP_CHNG);
+ if (ret < 0)
+ return ret;
+ chip->intr_bc_lvl = false;
+ chip->intr_comp_chng = false;
+ /* configure toggling mode: none/snk/src/drp */
+ switch (mode) {
+ case TOGGLINE_MODE_OFF:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_MODE_MASK,
+ FUSB_REG_CONTROL2_MODE_NONE);
+ if (ret < 0)
+ return ret;
+ break;
+ case TOGGLING_MODE_SNK:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_MODE_MASK,
+ FUSB_REG_CONTROL2_MODE_UFP);
+ if (ret < 0)
+ return ret;
+ break;
+ case TOGGLING_MODE_SRC:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_MODE_MASK,
+ FUSB_REG_CONTROL2_MODE_DFP);
+ if (ret < 0)
+ return ret;
+ break;
+ case TOGGLING_MODE_DRP:
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_MODE_MASK,
+ FUSB_REG_CONTROL2_MODE_DRP);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ break;
+ }
+
+ if (mode == TOGGLINE_MODE_OFF) {
+ /* mask TOGDONE interrupt */
+ ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA,
+ FUSB_REG_MASKA_TOGDONE);
+ if (ret < 0)
+ return ret;
+ chip->intr_togdone = false;
+ } else {
+ /* Datasheet says vconn MUST be off when toggling */
+ WARN(chip->vconn_on, "Vconn is on during toggle start");
+ /* unmask TOGDONE interrupt */
+ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA,
+ FUSB_REG_MASKA_TOGDONE);
+ if (ret < 0)
+ return ret;
+ chip->intr_togdone = true;
+ /* start toggling */
+ ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2,
+ FUSB_REG_CONTROL2_TOGGLE);
+ if (ret < 0)
+ return ret;
+ /* during toggling, consider cc as Open */
+ chip->cc1 = TYPEC_CC_OPEN;
+ chip->cc2 = TYPEC_CC_OPEN;
+ }
+ chip->toggling_mode = mode;
+
+ return ret;
+}
+
+static const char * const typec_cc_status_name[] = {
+ [TYPEC_CC_OPEN] = "Open",
+ [TYPEC_CC_RA] = "Ra",
+ [TYPEC_CC_RD] = "Rd",
+ [TYPEC_CC_RP_DEF] = "Rp-def",
+ [TYPEC_CC_RP_1_5] = "Rp-1.5",
+ [TYPEC_CC_RP_3_0] = "Rp-3.0",
+};
+
+static const enum src_current_status cc_src_current[] = {
+ [TYPEC_CC_OPEN] = SRC_CURRENT_DEFAULT,
+ [TYPEC_CC_RA] = SRC_CURRENT_DEFAULT,
+ [TYPEC_CC_RD] = SRC_CURRENT_DEFAULT,
+ [TYPEC_CC_RP_DEF] = SRC_CURRENT_DEFAULT,
+ [TYPEC_CC_RP_1_5] = SRC_CURRENT_MEDIUM,
+ [TYPEC_CC_RP_3_0] = SRC_CURRENT_HIGH,
+};
+
+static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+ bool pull_up, pull_down;
+ u8 rd_mda;
+
+ mutex_lock(&chip->lock);
+ switch (cc) {
+ case TYPEC_CC_OPEN:
+ pull_up = false;
+ pull_down = false;
+ break;
+ case TYPEC_CC_RD:
+ pull_up = false;
+ pull_down = true;
+ break;
+ case TYPEC_CC_RP_DEF:
+ case TYPEC_CC_RP_1_5:
+ case TYPEC_CC_RP_3_0:
+ pull_up = true;
+ pull_down = false;
+ break;
+ default:
+ fusb302_log(chip, "unsupported cc value %s",
+ typec_cc_status_name[cc]);
+ ret = -EINVAL;
+ goto done;
+ }
+ ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot stop toggling, ret=%d", ret);
+ goto done;
+ }
+ ret = fusb302_set_cc_pull(chip, pull_up, pull_down);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot set cc pulling up %s, down %s, ret = %d",
+ pull_up ? "True" : "False",
+ pull_down ? "True" : "False",
+ ret);
+ goto done;
+ }
+ /* reset the cc status */
+ chip->cc1 = TYPEC_CC_OPEN;
+ chip->cc2 = TYPEC_CC_OPEN;
+ /* adjust current for SRC */
+ if (pull_up) {
+ ret = fusb302_set_src_current(chip, cc_src_current[cc]);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set src current %s, ret=%d",
+ typec_cc_status_name[cc], ret);
+ goto done;
+ }
+ }
+ /* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */
+ if (pull_up) {
+ rd_mda = rd_mda_value[cc_src_current[cc]];
+ ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot set SRC measure value, ret=%d",
+ ret);
+ goto done;
+ }
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
+ FUSB_REG_MASK_BC_LVL |
+ FUSB_REG_MASK_COMP_CHNG,
+ FUSB_REG_MASK_COMP_CHNG);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
+ ret);
+ goto done;
+ }
+ chip->intr_bc_lvl = false;
+ chip->intr_comp_chng = true;
+ }
+ if (pull_down) {
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
+ FUSB_REG_MASK_BC_LVL |
+ FUSB_REG_MASK_COMP_CHNG,
+ FUSB_REG_MASK_BC_LVL);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
+ ret);
+ goto done;
+ }
+ chip->intr_bc_lvl = true;
+ chip->intr_comp_chng = false;
+ }
+ fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]);
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1,
+ enum typec_cc_status *cc2)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+
+ mutex_lock(&chip->lock);
+ *cc1 = chip->cc1;
+ *cc2 = chip->cc2;
+ fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1],
+ typec_cc_status_name[*cc2]);
+ mutex_unlock(&chip->lock);
+
+ return 0;
+}
+
+static int tcpm_set_polarity(struct tcpc_dev *dev,
+ enum typec_cc_polarity polarity)
+{
+ return 0;
+}
+
+static int tcpm_set_vconn(struct tcpc_dev *dev, bool on)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+ u8 switches0_data = 0x00;
+ u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 |
+ FUSB_REG_SWITCHES0_VCONN_CC2;
+
+ mutex_lock(&chip->lock);
+ if (chip->vconn_on == on) {
+ fusb302_log(chip, "vconn is already %s", on ? "On" : "Off");
+ goto done;
+ }
+ if (on) {
+ switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
+ FUSB_REG_SWITCHES0_VCONN_CC2 :
+ FUSB_REG_SWITCHES0_VCONN_CC1;
+ }
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+ switches0_mask, switches0_data);
+ if (ret < 0)
+ goto done;
+ chip->vconn_on = on;
+ fusb302_log(chip, "vconn := %s", on ? "On" : "Off");
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ if (chip->vbus_on == on) {
+ fusb302_log(chip, "vbus is already %s", on ? "On" : "Off");
+ } else {
+ if (on)
+ ret = regulator_enable(chip->vbus);
+ else
+ ret = regulator_disable(chip->vbus);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot %s vbus regulator, ret=%d",
+ on ? "enable" : "disable", ret);
+ goto done;
+ }
+ chip->vbus_on = on;
+ fusb302_log(chip, "vbus := %s", on ? "On" : "Off");
+ }
+ if (chip->charge_on == charge)
+ fusb302_log(chip, "charge is already %s",
+ charge ? "On" : "Off");
+ else
+ chip->charge_on = charge;
+
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int fusb302_pd_tx_flush(struct fusb302_chip *chip)
+{
+ return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0,
+ FUSB_REG_CONTROL0_TX_FLUSH);
+}
+
+static int fusb302_pd_rx_flush(struct fusb302_chip *chip)
+{
+ return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1,
+ FUSB_REG_CONTROL1_RX_FLUSH);
+}
+
+static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on)
+{
+ if (on)
+ return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1,
+ FUSB_REG_SWITCHES1_AUTO_GCRC);
+ return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1,
+ FUSB_REG_SWITCHES1_AUTO_GCRC);
+}
+
+static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on)
+{
+ int ret = 0;
+ u8 mask_interrupts = FUSB_REG_MASK_COLLISION;
+ u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL |
+ FUSB_REG_MASKA_HARDSENT |
+ FUSB_REG_MASKA_TX_SUCCESS |
+ FUSB_REG_MASKA_HARDRESET;
+ u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT;
+
+ ret = on ?
+ fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) :
+ fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts);
+ if (ret < 0)
+ return ret;
+ ret = on ?
+ fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) :
+ fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts);
+ if (ret < 0)
+ return ret;
+ ret = on ?
+ fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) :
+ fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts);
+ return ret;
+}
+
+static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ ret = fusb302_pd_rx_flush(chip);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret);
+ goto done;
+ }
+ ret = fusb302_pd_tx_flush(chip);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret);
+ goto done;
+ }
+ ret = fusb302_pd_set_auto_goodcrc(chip, on);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d",
+ on ? "on" : "off", ret);
+ goto done;
+ }
+ ret = fusb302_pd_set_interrupts(chip, on);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d",
+ on ? "on" : "off", ret);
+ goto done;
+ }
+ fusb302_log(chip, "pd := %s", on ? "on" : "off");
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static const char * const typec_role_name[] = {
+ [TYPEC_SINK] = "Sink",
+ [TYPEC_SOURCE] = "Source",
+};
+
+static const char * const typec_data_role_name[] = {
+ [TYPEC_DEVICE] = "Device",
+ [TYPEC_HOST] = "Host",
+};
+
+static int tcpm_set_roles(struct tcpc_dev *dev, bool attached,
+ enum typec_role pwr, enum typec_data_role data)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+ u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE |
+ FUSB_REG_SWITCHES1_DATAROLE;
+ u8 switches1_data = 0x00;
+
+ mutex_lock(&chip->lock);
+ if (pwr == TYPEC_SOURCE)
+ switches1_data |= FUSB_REG_SWITCHES1_POWERROLE;
+ if (data == TYPEC_HOST)
+ switches1_data |= FUSB_REG_SWITCHES1_DATAROLE;
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
+ switches1_mask, switches1_data);
+ if (ret < 0) {
+ fusb302_log(chip, "unable to set pd header %s, %s, ret=%d",
+ typec_role_name[pwr], typec_data_role_name[data],
+ ret);
+ goto done;
+ }
+ printk("pd header := %s, %s\n", typec_role_name[pwr],
+ typec_data_role_name[data]);
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int tcpm_start_drp_toggling(struct tcpc_dev *dev,
+ enum typec_cc_status cc)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ ret = fusb302_set_src_current(chip, cc_src_current[cc]);
+ if (ret < 0) {
+ fusb302_log(chip, "unable to set src current %s, ret=%d",
+ typec_cc_status_name[cc], ret);
+ goto done;
+ }
+ ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "unable to start drp toggling, ret=%d", ret);
+ goto done;
+ }
+ fusb302_log(chip, "start drp toggling");
+done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int fusb302_pd_send_message(struct fusb302_chip *chip,
+ const struct pd_message *msg)
+{
+ int ret = 0;
+ u8 buf[40];
+ u8 pos = 0;
+ int len;
+
+ /* SOP tokens */
+ buf[pos++] = FUSB302_TKN_SYNC1;
+ buf[pos++] = FUSB302_TKN_SYNC1;
+ buf[pos++] = FUSB302_TKN_SYNC1;
+ buf[pos++] = FUSB302_TKN_SYNC2;
+
+ len = pd_header_cnt_le(msg->header) * 4;
+ /* plug 2 for header */
+ len += 2;
+ if (len > 0x1F) {
+ fusb302_log(chip,
+ "PD message too long %d (incl. header)", len);
+ return -EINVAL;
+ }
+ /* packsym tells the FUSB302 chip that the next X bytes are payload */
+ buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F);
+ memcpy(&buf[pos], &msg->header, sizeof(msg->header));
+ pos += sizeof(msg->header);
+
+ len -= 2;
+ memcpy(&buf[pos], msg->payload, len);
+ pos += len;
+
+ /* CRC */
+ buf[pos++] = FUSB302_TKN_JAMCRC;
+ /* EOP */
+ buf[pos++] = FUSB302_TKN_EOP;
+ /* turn tx off after sending message */
+ buf[pos++] = FUSB302_TKN_TXOFF;
+ /* start transmission */
+ buf[pos++] = FUSB302_TKN_TXON;
+
+ ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf);
+ if (ret < 0)
+ return ret;
+ fusb302_log(chip, "sending PD message header: %x", msg->header);
+ fusb302_log(chip, "sending PD message len: %d", len);
+
+ return ret;
+}
+
+static int fusb302_pd_send_hardreset(struct fusb302_chip *chip)
+{
+ return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
+ FUSB_REG_CONTROL3_SEND_HARDRESET);
+}
+
+static const char * const transmit_type_name[] = {
+ [TCPC_TX_SOP] = "SOP",
+ [TCPC_TX_SOP_PRIME] = "SOP'",
+ [TCPC_TX_SOP_PRIME_PRIME] = "SOP''",
+ [TCPC_TX_SOP_DEBUG_PRIME] = "DEBUG'",
+ [TCPC_TX_SOP_DEBUG_PRIME_PRIME] = "DEBUG''",
+ [TCPC_TX_HARD_RESET] = "HARD_RESET",
+ [TCPC_TX_CABLE_RESET] = "CABLE_RESET",
+ [TCPC_TX_BIST_MODE_2] = "BIST_MODE_2",
+};
+
+static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type,
+ const struct pd_message *msg)
+{
+ struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+ tcpc_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ switch (type) {
+ case TCPC_TX_SOP:
+ ret = fusb302_pd_send_message(chip, msg);
+ if (ret < 0)
+ fusb302_log(chip,
+ "cannot send PD message, ret=%d", ret);
+ break;
+ case TCPC_TX_HARD_RESET:
+ ret = fusb302_pd_send_hardreset(chip);
+ if (ret < 0)
+ fusb302_log(chip,
+ "cannot send hardreset, ret=%d", ret);
+ break;
+ default:
+ fusb302_log(chip, "type %s not supported",
+ transmit_type_name[type]);
+ ret = -EINVAL;
+ }
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl)
+{
+ if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX)
+ return TYPEC_CC_RP_3_0;
+ if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230)
+ return TYPEC_CC_RP_1_5;
+ if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600)
+ return TYPEC_CC_RP_DEF;
+ return TYPEC_CC_OPEN;
+}
+
+static void fusb302_bc_lvl_handler_work(struct work_struct *work)
+{
+ struct fusb302_chip *chip = container_of(work, struct fusb302_chip,
+ bc_lvl_handler.work);
+ int ret = 0;
+ u8 status0;
+ u8 bc_lvl;
+ enum typec_cc_status cc_status;
+
+ mutex_lock(&chip->lock);
+ if (!chip->intr_bc_lvl) {
+ fusb302_log(chip, "BC_LVL interrupt is turned off, abort");
+ goto done;
+ }
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+ if (ret < 0)
+ goto done;
+ fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0);
+ if (status0 & FUSB_REG_STATUS0_ACTIVITY) {
+ fusb302_log(chip, "CC activities detected, delay handling");
+ mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
+ msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
+ goto done;
+ }
+ bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
+ cc_status = fusb302_bc_lvl_to_cc(bc_lvl);
+ if (chip->cc_polarity == TYPEC_POLARITY_CC1) {
+ if (chip->cc1 != cc_status) {
+ fusb302_log(chip, "cc1: %s -> %s",
+ typec_cc_status_name[chip->cc1],
+ typec_cc_status_name[cc_status]);
+ chip->cc1 = cc_status;
+ tcpm_cc_change(chip->tcpm_port);
+ }
+ } else {
+ if (chip->cc2 != cc_status) {
+ fusb302_log(chip, "cc2: %s -> %s",
+ typec_cc_status_name[chip->cc2],
+ typec_cc_status_name[cc_status]);
+ chip->cc2 = cc_status;
+ tcpm_cc_change(chip->tcpm_port);
+ }
+ }
+
+done:
+ mutex_unlock(&chip->lock);
+}
+
+#define PDO_FIXED_FLAGS \
+ (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
+
+static const u32 src_pdo[] = {
+ PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
+};
+
+static const u32 snk_pdo[] = {
+ PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
+};
+
+static const struct tcpc_config fusb302_tcpc_config = {
+ .src_pdo = src_pdo,
+ .nr_src_pdo = ARRAY_SIZE(src_pdo),
+ .operating_snk_mw = 2500,
+ .type = TYPEC_PORT_DRP,
+ .data = TYPEC_PORT_DRD,
+ .default_role = TYPEC_SINK,
+ .alt_modes = NULL,
+};
+
+static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
+{
+ fusb302_tcpc_dev->init = tcpm_init;
+ fusb302_tcpc_dev->get_vbus = tcpm_get_vbus;
+ fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit;
+ fusb302_tcpc_dev->set_cc = tcpm_set_cc;
+ fusb302_tcpc_dev->get_cc = tcpm_get_cc;
+ fusb302_tcpc_dev->set_polarity = tcpm_set_polarity;
+ fusb302_tcpc_dev->set_vconn = tcpm_set_vconn;
+ fusb302_tcpc_dev->set_vbus = tcpm_set_vbus;
+ fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx;
+ fusb302_tcpc_dev->set_roles = tcpm_set_roles;
+ fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
+ fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit;
+}
+
+static const char * const cc_polarity_name[] = {
+ [TYPEC_POLARITY_CC1] = "Polarity_CC1",
+ [TYPEC_POLARITY_CC2] = "Polarity_CC2",
+};
+
+static int fusb302_set_cc_polarity(struct fusb302_chip *chip,
+ enum typec_cc_polarity cc_polarity)
+{
+ int ret = 0;
+ u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
+ FUSB_REG_SWITCHES0_CC2_PU_EN |
+ FUSB_REG_SWITCHES0_VCONN_CC1 |
+ FUSB_REG_SWITCHES0_VCONN_CC2 |
+ FUSB_REG_SWITCHES0_MEAS_CC1 |
+ FUSB_REG_SWITCHES0_MEAS_CC2;
+ u8 switches0_data = 0x00;
+ u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN |
+ FUSB_REG_SWITCHES1_TXCC2_EN;
+ u8 switches1_data = 0x00;
+
+ if (cc_polarity == TYPEC_POLARITY_CC1) {
+ switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1;
+ if (chip->vconn_on)
+ switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2;
+ if (chip->pull_up)
+ switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN;
+ switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN;
+ } else {
+ switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2;
+ if (chip->vconn_on)
+ switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1;
+ if (chip->pull_up)
+ switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN;
+ switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN;
+ }
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+ switches0_mask, switches0_data);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
+ switches1_mask, switches1_data);
+ if (ret < 0)
+ return ret;
+ chip->cc_polarity = cc_polarity;
+
+ return ret;
+}
+
+static int fusb302_handle_togdone_snk(struct fusb302_chip *chip,
+ u8 togdone_result)
+{
+ int ret = 0;
+ u8 status0;
+ u8 bc_lvl;
+ enum typec_cc_polarity cc_polarity;
+ enum typec_cc_status cc_status_active, cc1, cc2;
+
+ /* set pull_up, pull_down */
+ ret = fusb302_set_cc_pull(chip, false, true);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret);
+ return ret;
+ }
+ /* set polarity */
+ cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ?
+ TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
+ ret = fusb302_set_cc_polarity(chip, cc_polarity);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
+ cc_polarity_name[cc_polarity], ret);
+ return ret;
+ }
+ /* fusb302_set_cc_polarity() has set the correct measure block */
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+ if (ret < 0)
+ return ret;
+ bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
+ cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl);
+ /* restart toggling if the cc status on the active line is OPEN */
+ if (cc_status_active == TYPEC_CC_OPEN) {
+ fusb302_log(chip, "restart toggling as CC_OPEN detected");
+ ret = fusb302_set_toggling(chip, chip->toggling_mode);
+ return ret;
+ }
+ /* update tcpm with the new cc value */
+ cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
+ cc_status_active : TYPEC_CC_OPEN;
+ cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
+ cc_status_active : TYPEC_CC_OPEN;
+ if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
+ chip->cc1 = cc1;
+ chip->cc2 = cc2;
+ tcpm_cc_change(chip->tcpm_port);
+ }
+ /* turn off toggling */
+ ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot set toggling mode off, ret=%d", ret);
+ return ret;
+ }
+ /* unmask bc_lvl interrupt */
+ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot unmask bc_lcl interrupt, ret=%d", ret);
+ return ret;
+ }
+ chip->intr_bc_lvl = true;
+ fusb302_log(chip, "detected cc1=%s, cc2=%s",
+ typec_cc_status_name[cc1],
+ typec_cc_status_name[cc2]);
+
+ return ret;
+}
+
+static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
+ u8 togdone_result)
+{
+ /*
+ * - set polarity (measure cc, vconn, tx)
+ * - set pull_up, pull_down
+ * - set cc1, cc2, and update to tcpm_port
+ * - set I_COMP interrupt on
+ */
+ int ret = 0;
+ u8 status0;
+ u8 ra_mda = ra_mda_value[chip->src_current_status];
+ u8 rd_mda = rd_mda_value[chip->src_current_status];
+ bool ra_comp, rd_comp;
+ enum typec_cc_polarity cc_polarity;
+ enum typec_cc_status cc_status_active, cc1, cc2;
+
+ /* set pull_up, pull_down */
+ ret = fusb302_set_cc_pull(chip, true, false);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret);
+ return ret;
+ }
+ /* set polarity */
+ cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ?
+ TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
+ ret = fusb302_set_cc_polarity(chip, cc_polarity);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
+ cc_polarity_name[cc_polarity], ret);
+ return ret;
+ }
+ /* fusb302_set_cc_polarity() has set the correct measure block */
+ ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+ if (ret < 0)
+ return ret;
+ usleep_range(50, 100);
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+ if (ret < 0)
+ return ret;
+ rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
+ if (!rd_comp) {
+ ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda);
+ if (ret < 0)
+ return ret;
+ usleep_range(50, 100);
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+ if (ret < 0)
+ return ret;
+ ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
+ }
+ if (rd_comp)
+ cc_status_active = TYPEC_CC_OPEN;
+ else if (ra_comp)
+ cc_status_active = TYPEC_CC_RD;
+ else
+ /* Ra is not supported, report as Open */
+ cc_status_active = TYPEC_CC_OPEN;
+ /* restart toggling if the cc status on the active line is OPEN */
+ if (cc_status_active == TYPEC_CC_OPEN) {
+ fusb302_log(chip, "restart toggling as CC_OPEN detected");
+ ret = fusb302_set_toggling(chip, chip->toggling_mode);
+ return ret;
+ }
+ /* update tcpm with the new cc value */
+ cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
+ cc_status_active : TYPEC_CC_OPEN;
+ cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
+ cc_status_active : TYPEC_CC_OPEN;
+ if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
+ chip->cc1 = cc1;
+ chip->cc2 = cc2;
+ tcpm_cc_change(chip->tcpm_port);
+ }
+ /* turn off toggling */
+ ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot set toggling mode off, ret=%d", ret);
+ return ret;
+ }
+ /* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */
+ ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+ if (ret < 0)
+ return ret;
+ /* unmask comp_chng interrupt */
+ ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK,
+ FUSB_REG_MASK_COMP_CHNG);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot unmask bc_lcl interrupt, ret=%d", ret);
+ return ret;
+ }
+ chip->intr_comp_chng = true;
+ fusb302_log(chip, "detected cc1=%s, cc2=%s",
+ typec_cc_status_name[cc1],
+ typec_cc_status_name[cc2]);
+
+ return ret;
+}
+
+static int fusb302_handle_togdone(struct fusb302_chip *chip)
+{
+ int ret = 0;
+ u8 status1a;
+ u8 togdone_result;
+
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a);
+ if (ret < 0)
+ return ret;
+ togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) &
+ FUSB_REG_STATUS1A_TOGSS_MASK;
+ switch (togdone_result) {
+ case FUSB_REG_STATUS1A_TOGSS_SNK1:
+ case FUSB_REG_STATUS1A_TOGSS_SNK2:
+ return fusb302_handle_togdone_snk(chip, togdone_result);
+ case FUSB_REG_STATUS1A_TOGSS_SRC1:
+ case FUSB_REG_STATUS1A_TOGSS_SRC2:
+ return fusb302_handle_togdone_src(chip, togdone_result);
+ case FUSB_REG_STATUS1A_TOGSS_AA:
+ /* doesn't support */
+ fusb302_log(chip, "AudioAccessory not supported");
+ fusb302_set_toggling(chip, chip->toggling_mode);
+ break;
+ default:
+ fusb302_log(chip, "TOGDONE with an invalid state: %d",
+ togdone_result);
+ fusb302_set_toggling(chip, chip->toggling_mode);
+ break;
+ }
+ return ret;
+}
+
+static int fusb302_pd_reset(struct fusb302_chip *chip)
+{
+ return fusb302_i2c_set_bits(chip, FUSB_REG_RESET,
+ FUSB_REG_RESET_PD_RESET);
+}
+
+static int fusb302_pd_read_message(struct fusb302_chip *chip,
+ struct pd_message *msg)
+{
+ int ret = 0;
+ u8 token;
+ u8 crc[4];
+ int len;
+
+ /* first SOP token */
+ ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token);
+ if (ret < 0)
+ return ret;
+ ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2,
+ (u8 *)&msg->header);
+ if (ret < 0)
+ return ret;
+ len = pd_header_cnt_le(msg->header) * 4;
+ /* add 4 to length to include the CRC */
+ if (len > PD_MAX_PAYLOAD * 4) {
+ fusb302_log(chip, "PD message too long %d", len);
+ return -EINVAL;
+ }
+ if (len > 0) {
+ ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len,
+ (u8 *)msg->payload);
+ if (ret < 0)
+ return ret;
+ }
+ /* another 4 bytes to read CRC out */
+ ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc);
+ if (ret < 0)
+ return ret;
+ fusb302_log(chip, "PD message header: %x", msg->header);
+ fusb302_log(chip, "PD message len: %d", len);
+
+ /*
+ * Check if we've read off a GoodCRC message. If so then indicate to
+ * TCPM that the previous transmission has completed. Otherwise we pass
+ * the received message over to TCPM for processing.
+ *
+ * We make this check here instead of basing the reporting decision on
+ * the IRQ event type, as it's possible for the chip to report the
+ * TX_SUCCESS and GCRCSENT events out of order on occasion, so we need
+ * to check the message type to ensure correct reporting to TCPM.
+ */
+ if ((!len) && (pd_header_type_le(msg->header) == PD_CTRL_GOOD_CRC))
+ tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
+ else
+ tcpm_pd_receive(chip->tcpm_port, msg);
+
+ return ret;
+}
+
+static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
+{
+ struct fusb302_chip *chip = dev_id;
+ int ret = 0;
+ u8 interrupt;
+ u8 interrupta;
+ u8 interruptb;
+ u8 status0;
+ bool vbus_present;
+ bool comp_result;
+ bool intr_togdone;
+ bool intr_bc_lvl;
+ bool intr_comp_chng;
+ struct pd_message pd_msg;
+
+ mutex_lock(&chip->lock);
+ /* grab a snapshot of intr flags */
+ intr_togdone = chip->intr_togdone;
+ intr_bc_lvl = chip->intr_bc_lvl;
+ intr_comp_chng = chip->intr_comp_chng;
+
+ ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt);
+ if (ret < 0)
+ goto done;
+ ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta);
+ if (ret < 0)
+ goto done;
+ ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb);
+ if (ret < 0)
+ goto done;
+ ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+ if (ret < 0)
+ goto done;
+ fusb302_log(chip,
+ "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x",
+ interrupt, interrupta, interruptb, status0);
+
+ if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) {
+ vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK);
+ fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s",
+ vbus_present ? "On" : "Off");
+ if (vbus_present != chip->vbus_present) {
+ chip->vbus_present = vbus_present;
+ tcpm_vbus_change(chip->tcpm_port);
+ }
+ }
+
+ if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) {
+ fusb302_log(chip, "IRQ: TOGDONE");
+ ret = fusb302_handle_togdone(chip);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "handle togdone error, ret=%d", ret);
+ goto done;
+ }
+ }
+
+ if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) {
+ fusb302_log(chip, "IRQ: BC_LVL, handler pending");
+ /*
+ * as BC_LVL interrupt can be affected by PD activity,
+ * apply delay to for the handler to wait for the PD
+ * signaling to finish.
+ */
+ mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
+ msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
+ }
+
+ if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) {
+ comp_result = !!(status0 & FUSB_REG_STATUS0_COMP);
+ fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s",
+ comp_result ? "true" : "false");
+ if (comp_result) {
+ /* cc level > Rd_threashold, detach */
+ if (chip->cc_polarity == TYPEC_POLARITY_CC1)
+ chip->cc1 = TYPEC_CC_OPEN;
+ else
+ chip->cc2 = TYPEC_CC_OPEN;
+ tcpm_cc_change(chip->tcpm_port);
+ }
+ }
+
+ if (interrupt & FUSB_REG_INTERRUPT_COLLISION) {
+ fusb302_log(chip, "IRQ: PD collision");
+ tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
+ }
+
+ if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) {
+ fusb302_log(chip, "IRQ: PD retry failed");
+ tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
+ }
+
+ if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) {
+ fusb302_log(chip, "IRQ: PD hardreset sent");
+ ret = fusb302_pd_reset(chip);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot PD reset, ret=%d", ret);
+ goto done;
+ }
+ tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
+ }
+
+ if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) {
+ fusb302_log(chip, "IRQ: PD tx success");
+ ret = fusb302_pd_read_message(chip, &pd_msg);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot read in PD message, ret=%d", ret);
+ goto done;
+ }
+ }
+
+ if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) {
+ fusb302_log(chip, "IRQ: PD received hardreset");
+ ret = fusb302_pd_reset(chip);
+ if (ret < 0) {
+ fusb302_log(chip, "cannot PD reset, ret=%d", ret);
+ goto done;
+ }
+ tcpm_pd_hard_reset(chip->tcpm_port);
+ }
+
+ if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) {
+ fusb302_log(chip, "IRQ: PD sent good CRC");
+ ret = fusb302_pd_read_message(chip, &pd_msg);
+ if (ret < 0) {
+ fusb302_log(chip,
+ "cannot read in PD message, ret=%d", ret);
+ goto done;
+ }
+ }
+done:
+ mutex_unlock(&chip->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip)
+{
+ struct device *dev = chip->dev;
+ u32 max_uv, max_ua;
+
+ chip->snk_pdo[0] = PDO_FIXED(5000, 400, PDO_FIXED_FLAGS);
+
+ /*
+ * As max_snk_ma/mv/mw is not needed for tcpc_config,
+ * those settings should be passed in via sink PDO, so
+ * "fcs, max-sink-*" properties will be deprecated, to
+ * perserve compatibility with existing users of them,
+ * we read those properties to convert them to be a var
+ * PDO.
+ */
+ if (device_property_read_u32(dev, "fcs,max-sink-microvolt", &max_uv) ||
+ device_property_read_u32(dev, "fcs,max-sink-microamp", &max_ua))
+ return 1;
+
+ chip->snk_pdo[1] = PDO_VAR(5000, max_uv / 1000, max_ua / 1000);
+ return 2;
+}
+
+
+static int fusb302_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct fusb302_chip *chip;
+ struct i2c_adapter *adapter;
+ struct device *dev = &client->dev;
+ const char *name;
+ int ret = 0;
+ u32 v;
+ struct gpio_desc *desc;
+ int id_irqnr;
+
+ adapter = to_i2c_adapter(client->dev.parent);
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
+ dev_err(&client->dev,
+ "I2C/SMBus block functionality not supported!\n");
+ return -ENODEV;
+ }
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->i2c_client = client;
+ i2c_set_clientdata(client, chip);
+ chip->dev = &client->dev;
+ chip->tcpc_config = fusb302_tcpc_config;
+ chip->tcpc_dev.config = &chip->tcpc_config;
+ mutex_init(&chip->lock);
+
+ if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v))
+ chip->tcpc_config.operating_snk_mw = v / 1000;
+
+ /* Composite sink PDO */
+ chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip);
+ chip->tcpc_config.snk_pdo = chip->snk_pdo;
+
+ /*
+ * Devicetree platforms should get extcon via phandle (not yet
+ * supported). On ACPI platforms, we get the name from a device prop.
+ * This device prop is for kernel internal use only and is expected
+ * to be set by the platform code which also registers the i2c client
+ * for the fusb302.
+ */
+ if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) {
+ chip->extcon = extcon_get_extcon_dev(name);
+ if (!chip->extcon)
+ return -EPROBE_DEFER;
+ }
+
+ fusb302_debugfs_init(chip);
+
+ chip->wq = create_singlethread_workqueue(dev_name(chip->dev));
+ if (!chip->wq) {
+ ret = -ENOMEM;
+ goto clear_client_data;
+ }
+ INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work);
+ init_tcpc_dev(&chip->tcpc_dev);
+
+ chip->vbus = devm_regulator_get(chip->dev, "vbus");
+
+ chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev);
+ if (IS_ERR(chip->tcpm_port)) {
+ ret = PTR_ERR(chip->tcpm_port);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "cannot register tcpm port, ret=%d", ret);
+ goto destroy_workqueue;
+ }
+
+
+ desc = gpiod_get_index(chip->dev, NULL, 0, GPIOD_IN);
+ if (IS_ERR(desc)) {
+ pr_err("fail to get id-gpioirq\n");
+ return -1;
+ }
+
+ id_irqnr = gpiod_to_irq(desc);
+
+ ret = devm_request_threaded_irq(chip->dev, id_irqnr, NULL,
+ fusb302_irq_intn,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ "fsc_interrupt_int_n", chip);
+
+ if (ret) {
+ pr_err("failed to request ret=%d, id_irqnr=%d\n",
+ ret, id_irqnr);
+ goto tcpm_unregister_port;
+ }
+ chip->gpio_int_n_irq = id_irqnr;
+
+ pr_info("<%s> ok\n", __func__);
+
+ enable_irq_wake(id_irqnr);
+
+ return ret;
+
+tcpm_unregister_port:
+ tcpm_unregister_port(chip->tcpm_port);
+destroy_workqueue:
+ destroy_workqueue(chip->wq);
+clear_client_data:
+ i2c_set_clientdata(client, NULL);
+ fusb302_debugfs_exit(chip);
+
+ return ret;
+}
+
+static int fusb302_remove(struct i2c_client *client)
+{
+ struct fusb302_chip *chip = i2c_get_clientdata(client);
+
+ tcpm_unregister_port(chip->tcpm_port);
+ destroy_workqueue(chip->wq);
+ i2c_set_clientdata(client, NULL);
+ fusb302_debugfs_exit(chip);
+
+ return 0;
+}
+
+static int fusb302_pm_suspend(struct device *dev)
+{
+ struct fusb302_chip *chip = dev->driver_data;
+
+ if (atomic_read(&chip->i2c_busy))
+ return -EBUSY;
+ atomic_set(&chip->pm_suspend, 1);
+
+ return 0;
+}
+
+static int fusb302_pm_resume(struct device *dev)
+{
+ struct fusb302_chip *chip = dev->driver_data;
+
+ atomic_set(&chip->pm_suspend, 0);
+
+ return 0;
+}
+
+static const struct of_device_id fusb302_dt_match[] = {
+ {.compatible = "fcs,fusb302"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, fusb302_dt_match);
+
+static const struct i2c_device_id fusb302_i2c_device_id[] = {
+ {"typec_fusb302", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id);
+
+static const struct dev_pm_ops fusb302_pm_ops = {
+ .suspend = fusb302_pm_suspend,
+ .resume = fusb302_pm_resume,
+};
+
+static struct i2c_driver fusb302_driver = {
+ .driver = {
+ .name = "typec_fusb302",
+ .pm = &fusb302_pm_ops,
+ .of_match_table = of_match_ptr(fusb302_dt_match),
+ },
+ .probe = fusb302_probe,
+ .remove = fusb302_remove,
+ .id_table = fusb302_i2c_device_id,
+};
+module_i2c_driver(fusb302_driver);
+
+MODULE_AUTHOR("Yueyao Zhu <yueyao.zhu@gmail.com>");
+MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2016-2017 Google, Inc
+ *
+ * Fairchild FUSB302 Type-C Chip Driver
+ */
+
+#ifndef FUSB302_REG_H
+#define FUSB302_REG_H
+
+#define FUSB_REG_DEVICE_ID 0x01
+#define FUSB_REG_SWITCHES0 0x02
+#define FUSB_REG_SWITCHES0_CC2_PU_EN BIT(7)
+#define FUSB_REG_SWITCHES0_CC1_PU_EN BIT(6)
+#define FUSB_REG_SWITCHES0_VCONN_CC2 BIT(5)
+#define FUSB_REG_SWITCHES0_VCONN_CC1 BIT(4)
+#define FUSB_REG_SWITCHES0_MEAS_CC2 BIT(3)
+#define FUSB_REG_SWITCHES0_MEAS_CC1 BIT(2)
+#define FUSB_REG_SWITCHES0_CC2_PD_EN BIT(1)
+#define FUSB_REG_SWITCHES0_CC1_PD_EN BIT(0)
+#define FUSB_REG_SWITCHES1 0x03
+#define FUSB_REG_SWITCHES1_POWERROLE BIT(7)
+#define FUSB_REG_SWITCHES1_SPECREV1 BIT(6)
+#define FUSB_REG_SWITCHES1_SPECREV0 BIT(5)
+#define FUSB_REG_SWITCHES1_DATAROLE BIT(4)
+#define FUSB_REG_SWITCHES1_AUTO_GCRC BIT(2)
+#define FUSB_REG_SWITCHES1_TXCC2_EN BIT(1)
+#define FUSB_REG_SWITCHES1_TXCC1_EN BIT(0)
+#define FUSB_REG_MEASURE 0x04
+#define FUSB_REG_MEASURE_MDAC5 BIT(7)
+#define FUSB_REG_MEASURE_MDAC4 BIT(6)
+#define FUSB_REG_MEASURE_MDAC3 BIT(5)
+#define FUSB_REG_MEASURE_MDAC2 BIT(4)
+#define FUSB_REG_MEASURE_MDAC1 BIT(3)
+#define FUSB_REG_MEASURE_MDAC0 BIT(2)
+#define FUSB_REG_MEASURE_VBUS BIT(1)
+#define FUSB_REG_MEASURE_XXXX5 BIT(0)
+#define FUSB_REG_CONTROL0 0x06
+#define FUSB_REG_CONTROL0_TX_FLUSH BIT(6)
+#define FUSB_REG_CONTROL0_INT_MASK BIT(5)
+#define FUSB_REG_CONTROL0_HOST_CUR_MASK (0xC)
+#define FUSB_REG_CONTROL0_HOST_CUR_HIGH (0xC)
+#define FUSB_REG_CONTROL0_HOST_CUR_MED (0x8)
+#define FUSB_REG_CONTROL0_HOST_CUR_DEF (0x4)
+#define FUSB_REG_CONTROL0_TX_START BIT(0)
+#define FUSB_REG_CONTROL1 0x07
+#define FUSB_REG_CONTROL1_ENSOP2DB BIT(6)
+#define FUSB_REG_CONTROL1_ENSOP1DB BIT(5)
+#define FUSB_REG_CONTROL1_BIST_MODE2 BIT(4)
+#define FUSB_REG_CONTROL1_RX_FLUSH BIT(2)
+#define FUSB_REG_CONTROL1_ENSOP2 BIT(1)
+#define FUSB_REG_CONTROL1_ENSOP1 BIT(0)
+#define FUSB_REG_CONTROL2 0x08
+#define FUSB_REG_CONTROL2_MODE BIT(1)
+#define FUSB_REG_CONTROL2_MODE_MASK (0x6)
+#define FUSB_REG_CONTROL2_MODE_DFP (0x6)
+#define FUSB_REG_CONTROL2_MODE_UFP (0x4)
+#define FUSB_REG_CONTROL2_MODE_DRP (0x2)
+#define FUSB_REG_CONTROL2_MODE_NONE (0x0)
+#define FUSB_REG_CONTROL2_TOGGLE BIT(0)
+#define FUSB_REG_CONTROL3 0x09
+#define FUSB_REG_CONTROL3_SEND_HARDRESET BIT(6)
+#define FUSB_REG_CONTROL3_BIST_TMODE BIT(5) /* 302B Only */
+#define FUSB_REG_CONTROL3_AUTO_HARDRESET BIT(4)
+#define FUSB_REG_CONTROL3_AUTO_SOFTRESET BIT(3)
+#define FUSB_REG_CONTROL3_N_RETRIES BIT(1)
+#define FUSB_REG_CONTROL3_N_RETRIES_MASK (0x6)
+#define FUSB_REG_CONTROL3_N_RETRIES_3 (0x6)
+#define FUSB_REG_CONTROL3_N_RETRIES_2 (0x4)
+#define FUSB_REG_CONTROL3_N_RETRIES_1 (0x2)
+#define FUSB_REG_CONTROL3_AUTO_RETRY BIT(0)
+#define FUSB_REG_MASK 0x0A
+#define FUSB_REG_MASK_VBUSOK BIT(7)
+#define FUSB_REG_MASK_ACTIVITY BIT(6)
+#define FUSB_REG_MASK_COMP_CHNG BIT(5)
+#define FUSB_REG_MASK_CRC_CHK BIT(4)
+#define FUSB_REG_MASK_ALERT BIT(3)
+#define FUSB_REG_MASK_WAKE BIT(2)
+#define FUSB_REG_MASK_COLLISION BIT(1)
+#define FUSB_REG_MASK_BC_LVL BIT(0)
+#define FUSB_REG_POWER 0x0B
+#define FUSB_REG_POWER_PWR BIT(0)
+#define FUSB_REG_POWER_PWR_LOW 0x1
+#define FUSB_REG_POWER_PWR_MEDIUM 0x3
+#define FUSB_REG_POWER_PWR_HIGH 0x7
+#define FUSB_REG_POWER_PWR_ALL 0xF
+#define FUSB_REG_RESET 0x0C
+#define FUSB_REG_RESET_PD_RESET BIT(1)
+#define FUSB_REG_RESET_SW_RESET BIT(0)
+#define FUSB_REG_MASKA 0x0E
+#define FUSB_REG_MASKA_OCP_TEMP BIT(7)
+#define FUSB_REG_MASKA_TOGDONE BIT(6)
+#define FUSB_REG_MASKA_SOFTFAIL BIT(5)
+#define FUSB_REG_MASKA_RETRYFAIL BIT(4)
+#define FUSB_REG_MASKA_HARDSENT BIT(3)
+#define FUSB_REG_MASKA_TX_SUCCESS BIT(2)
+#define FUSB_REG_MASKA_SOFTRESET BIT(1)
+#define FUSB_REG_MASKA_HARDRESET BIT(0)
+#define FUSB_REG_MASKB 0x0F
+#define FUSB_REG_MASKB_GCRCSENT BIT(0)
+#define FUSB_REG_STATUS0A 0x3C
+#define FUSB_REG_STATUS0A_SOFTFAIL BIT(5)
+#define FUSB_REG_STATUS0A_RETRYFAIL BIT(4)
+#define FUSB_REG_STATUS0A_POWER BIT(2)
+#define FUSB_REG_STATUS0A_RX_SOFT_RESET BIT(1)
+#define FUSB_REG_STATUS0A_RX_HARD_RESET BIT(0)
+#define FUSB_REG_STATUS1A 0x3D
+#define FUSB_REG_STATUS1A_TOGSS BIT(3)
+#define FUSB_REG_STATUS1A_TOGSS_RUNNING 0x0
+#define FUSB_REG_STATUS1A_TOGSS_SRC1 0x1
+#define FUSB_REG_STATUS1A_TOGSS_SRC2 0x2
+#define FUSB_REG_STATUS1A_TOGSS_SNK1 0x5
+#define FUSB_REG_STATUS1A_TOGSS_SNK2 0x6
+#define FUSB_REG_STATUS1A_TOGSS_AA 0x7
+#define FUSB_REG_STATUS1A_TOGSS_POS (3)
+#define FUSB_REG_STATUS1A_TOGSS_MASK (0x7)
+#define FUSB_REG_STATUS1A_RXSOP2DB BIT(2)
+#define FUSB_REG_STATUS1A_RXSOP1DB BIT(1)
+#define FUSB_REG_STATUS1A_RXSOP BIT(0)
+#define FUSB_REG_INTERRUPTA 0x3E
+#define FUSB_REG_INTERRUPTA_OCP_TEMP BIT(7)
+#define FUSB_REG_INTERRUPTA_TOGDONE BIT(6)
+#define FUSB_REG_INTERRUPTA_SOFTFAIL BIT(5)
+#define FUSB_REG_INTERRUPTA_RETRYFAIL BIT(4)
+#define FUSB_REG_INTERRUPTA_HARDSENT BIT(3)
+#define FUSB_REG_INTERRUPTA_TX_SUCCESS BIT(2)
+#define FUSB_REG_INTERRUPTA_SOFTRESET BIT(1)
+#define FUSB_REG_INTERRUPTA_HARDRESET BIT(0)
+#define FUSB_REG_INTERRUPTB 0x3F
+#define FUSB_REG_INTERRUPTB_GCRCSENT BIT(0)
+#define FUSB_REG_STATUS0 0x40
+#define FUSB_REG_STATUS0_VBUSOK BIT(7)
+#define FUSB_REG_STATUS0_ACTIVITY BIT(6)
+#define FUSB_REG_STATUS0_COMP BIT(5)
+#define FUSB_REG_STATUS0_CRC_CHK BIT(4)
+#define FUSB_REG_STATUS0_ALERT BIT(3)
+#define FUSB_REG_STATUS0_WAKE BIT(2)
+#define FUSB_REG_STATUS0_BC_LVL_MASK 0x03
+#define FUSB_REG_STATUS0_BC_LVL_0_200 0x0
+#define FUSB_REG_STATUS0_BC_LVL_200_600 0x1
+#define FUSB_REG_STATUS0_BC_LVL_600_1230 0x2
+#define FUSB_REG_STATUS0_BC_LVL_1230_MAX 0x3
+#define FUSB_REG_STATUS0_BC_LVL1 BIT(1)
+#define FUSB_REG_STATUS0_BC_LVL0 BIT(0)
+#define FUSB_REG_STATUS1 0x41
+#define FUSB_REG_STATUS1_RXSOP2 BIT(7)
+#define FUSB_REG_STATUS1_RXSOP1 BIT(6)
+#define FUSB_REG_STATUS1_RX_EMPTY BIT(5)
+#define FUSB_REG_STATUS1_RX_FULL BIT(4)
+#define FUSB_REG_STATUS1_TX_EMPTY BIT(3)
+#define FUSB_REG_STATUS1_TX_FULL BIT(2)
+#define FUSB_REG_INTERRUPT 0x42
+#define FUSB_REG_INTERRUPT_VBUSOK BIT(7)
+#define FUSB_REG_INTERRUPT_ACTIVITY BIT(6)
+#define FUSB_REG_INTERRUPT_COMP_CHNG BIT(5)
+#define FUSB_REG_INTERRUPT_CRC_CHK BIT(4)
+#define FUSB_REG_INTERRUPT_ALERT BIT(3)
+#define FUSB_REG_INTERRUPT_WAKE BIT(2)
+#define FUSB_REG_INTERRUPT_COLLISION BIT(1)
+#define FUSB_REG_INTERRUPT_BC_LVL BIT(0)
+#define FUSB_REG_FIFOS 0x43
+
+/* Tokens defined for the FUSB302 TX FIFO */
+enum fusb302_txfifo_tokens {
+ FUSB302_TKN_TXON = 0xA1,
+ FUSB302_TKN_SYNC1 = 0x12,
+ FUSB302_TKN_SYNC2 = 0x13,
+ FUSB302_TKN_SYNC3 = 0x1B,
+ FUSB302_TKN_RST1 = 0x15,
+ FUSB302_TKN_RST2 = 0x16,
+ FUSB302_TKN_PACKSYM = 0x80,
+ FUSB302_TKN_JAMCRC = 0xFF,
+ FUSB302_TKN_EOP = 0x14,
+ FUSB302_TKN_TXOFF = 0xFE,
+};
+
+#endif
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * USB Type-C Multiplexer/DeMultiplexer Switch support
+ *
+ * Copyright (C) 2018 Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/usb/typec_mux.h>
+
+static DEFINE_MUTEX(switch_lock);
+static DEFINE_MUTEX(mux_lock);
+static LIST_HEAD(switch_list);
+static LIST_HEAD(mux_list);
+
+static void *typec_switch_match(struct device_connection *con, int ep,
+ void *data)
+{
+ struct typec_switch *sw;
+
+ list_for_each_entry(sw, &switch_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(sw->dev)))
+ return sw;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_switch_get - Find USB Type-C orientation switch
+ * @dev: The caller device
+ *
+ * Finds a switch linked with @dev. Returns a reference to the switch on
+ * success, NULL if no matching connection was found, or
+ * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch
+ * has not been enumerated yet.
+ */
+struct typec_switch *typec_switch_get(struct device *dev)
+{
+ struct typec_switch *sw;
+
+ mutex_lock(&switch_lock);
+ sw = device_connection_find_match(dev, "typec-switch", NULL,
+ typec_switch_match);
+ if (!IS_ERR_OR_NULL(sw)) {
+ WARN_ON(!try_module_get(sw->dev->driver->owner));
+ get_device(sw->dev);
+ }
+ mutex_unlock(&switch_lock);
+
+ return sw;
+}
+EXPORT_SYMBOL_GPL(typec_switch_get);
+
+/**
+ * typec_put_switch - Release USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Decrement reference count for @sw.
+ */
+void typec_switch_put(struct typec_switch *sw)
+{
+ if (!IS_ERR_OR_NULL(sw)) {
+ module_put(sw->dev->driver->owner);
+ put_device(sw->dev);
+ }
+}
+EXPORT_SYMBOL_GPL(typec_switch_put);
+
+/**
+ * typec_switch_register - Register USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * This function registers a switch that can be used for routing the correct
+ * data pairs depending on the cable plug orientation from the USB Type-C
+ * connector to the USB controllers. USB Type-C plugs can be inserted
+ * right-side-up or upside-down.
+ */
+int typec_switch_register(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_add_tail(&sw->entry, &switch_list);
+ mutex_unlock(&switch_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_switch_register);
+
+/**
+ * typec_switch_unregister - Unregister USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Unregister switch that was registered with typec_switch_register().
+ */
+void typec_switch_unregister(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_del(&sw->entry);
+ mutex_unlock(&switch_lock);
+}
+EXPORT_SYMBOL_GPL(typec_switch_unregister);
+
+/* ------------------------------------------------------------------------- */
+
+static void *typec_mux_match(struct device_connection *con, int ep, void *data)
+{
+ struct typec_mux *mux;
+
+ list_for_each_entry(mux, &mux_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(mux->dev)))
+ return mux;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_mux_get - Find USB Type-C Multiplexer
+ * @dev: The caller device
+ * @name: Mux identifier
+ *
+ * Finds a mux linked to the caller. This function is primarily meant for the
+ * Type-C drivers. Returns a reference to the mux on success, NULL if no
+ * matching connection was found, or ERR_PTR(-EPROBE_DEFER) when a connection
+ * was found but the mux has not been enumerated yet.
+ */
+struct typec_mux *typec_mux_get(struct device *dev, const char *name)
+{
+ struct typec_mux *mux;
+
+ mutex_lock(&mux_lock);
+ mux = device_connection_find_match(dev, name, NULL, typec_mux_match);
+ if (!IS_ERR_OR_NULL(mux)) {
+ WARN_ON(!try_module_get(mux->dev->driver->owner));
+ get_device(mux->dev);
+ }
+ mutex_unlock(&mux_lock);
+
+ return mux;
+}
+EXPORT_SYMBOL_GPL(typec_mux_get);
+
+/**
+ * typec_mux_put - Release handle to a Multiplexer
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Decrements reference count for @mux.
+ */
+void typec_mux_put(struct typec_mux *mux)
+{
+ if (!IS_ERR_OR_NULL(mux)) {
+ module_put(mux->dev->driver->owner);
+ put_device(mux->dev);
+ }
+}
+EXPORT_SYMBOL_GPL(typec_mux_put);
+
+/**
+ * typec_mux_register - Register Multiplexer routing USB Type-C pins
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * USB Type-C connectors can be used for alternate modes of operation besides
+ * USB when Accessory/Alternate Modes are supported. With some of those modes,
+ * the pins on the connector need to be reconfigured. This function registers
+ * multiplexer switches routing the pins on the connector.
+ */
+int typec_mux_register(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_add_tail(&mux->entry, &mux_list);
+ mutex_unlock(&mux_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_mux_register);
+
+/**
+ * typec_mux_unregister - Unregister Multiplexer Switch
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Unregister mux that was registered with typec_mux_register().
+ */
+void typec_mux_unregister(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_del(&mux->entry);
+ mutex_unlock(&mux_lock);
+}
+EXPORT_SYMBOL_GPL(typec_mux_unregister);
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Type-C Port Controller Interface.
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec.h>
+
+#include "tcpci.h"
+
+#define PD_RETRY_COUNT 3
+/* FIXME: bypass warn_on for pd testing */
+#if defined(WARN_ON)
+#undef WARN_ON
+#define WARN_ON(_x) _x
+#endif
+
+struct tcpci {
+ struct device *dev;
+
+ struct tcpm_port *port;
+
+ struct regmap *regmap;
+
+ bool controls_vbus;
+
+ struct tcpc_dev tcpc;
+ struct tcpci_data *data;
+};
+
+struct tcpci_chip {
+ struct tcpci *tcpci;
+ struct tcpci_data data;
+};
+
+static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc)
+{
+ return container_of(tcpc, struct tcpci, tcpc);
+}
+
+static int tcpci_read16(struct tcpci *tcpci, unsigned int reg, u16 *val)
+{
+ return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16));
+}
+
+static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val)
+{
+ return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16));
+}
+
+static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg;
+ int ret;
+
+ switch (cc) {
+ case TYPEC_CC_RA:
+ reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT);
+ break;
+ case TYPEC_CC_RD:
+ reg = (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ break;
+ case TYPEC_CC_RP_DEF:
+ reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
+ (TCPC_ROLE_CTRL_RP_VAL_DEF <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_1_5:
+ reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
+ (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_3_0:
+ reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
+ (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_OPEN:
+ default:
+ reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT);
+ break;
+ }
+
+ ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc,
+ enum typec_cc_status cc)
+{
+ int ret;
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg = TCPC_ROLE_CTRL_DRP;
+
+ /* Handle vendor drp toggling */
+ if (tcpci->data->start_drp_toggling) {
+ ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc);
+ if (ret < 0)
+ return ret;
+ }
+
+ switch (cc) {
+ default:
+ case TYPEC_CC_RP_DEF:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_1_5:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_3_0:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ }
+
+ if (cc == TYPEC_CC_RD)
+ reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ else
+ reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
+ ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+ if (ret < 0)
+ return ret;
+ return regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_LOOK4CONNECTION);
+}
+
+static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink)
+{
+ switch (cc) {
+ case 0x1:
+ return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RA;
+ case 0x2:
+ return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RD;
+ case 0x3:
+ if (sink)
+ return TYPEC_CC_RP_3_0;
+ /* fall through */
+ case 0x0:
+ default:
+ return TYPEC_CC_OPEN;
+ }
+}
+
+static int tcpci_get_cc(struct tcpc_dev *tcpc,
+ enum typec_cc_status *cc1, enum typec_cc_status *cc2)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg;
+ int ret;
+ int cc1_sink = 0, cc2_sink = 0;
+
+ if (tcpci->data->get_cc)
+ return tcpci->data->get_cc(tcpci, tcpci->data, cc1, cc2);
+
+ ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®);
+ if (!ret) {
+ if (((reg >> TCPC_ROLE_CTRL_CC1_SHIFT) &
+ TCPC_ROLE_CTRL_CC1_MASK) == TCPC_ROLE_CTRL_CC_RD)
+ cc1_sink = 1;
+ if (((reg >> TCPC_ROLE_CTRL_CC2_SHIFT) &
+ TCPC_ROLE_CTRL_CC2_MASK) == TCPC_ROLE_CTRL_CC_RD)
+ cc2_sink = 1;
+ }
+
+ ret = regmap_read(tcpci->regmap, TCPC_CC_STATUS, ®);
+ if (ret < 0)
+ return ret;
+
+ *cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) &
+ TCPC_CC_STATUS_CC1_MASK,
+ (reg & TCPC_CC_STATUS_TERM) | cc1_sink);
+ *cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) &
+ TCPC_CC_STATUS_CC2_MASK,
+ (reg & TCPC_CC_STATUS_TERM) | cc2_sink);
+
+ return 0;
+}
+
+static int tcpci_set_polarity(struct tcpc_dev *tcpc,
+ enum typec_cc_polarity polarity)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg;
+ int ret;
+
+ if (tcpci->data->set_polarity)
+ return tcpci->data->set_polarity(tcpci, tcpci->data, polarity);
+
+ /* Keep the disconnect cc line open */
+ ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®);
+ if (ret < 0)
+ return ret;
+
+ if (polarity == TYPEC_POLARITY_CC2)
+ reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT;
+ else
+ reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT;
+ ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
+ (polarity == TYPEC_POLARITY_CC2) ?
+ TCPC_TCPC_CTRL_ORIENTATION : 0);
+}
+
+static int tcpci_set_bist(struct tcpc_dev *tcpc, bool enable)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ int ret;
+
+ if (tcpci->data->set_bist) {
+ ret = tcpci->data->set_bist(tcpci, tcpci->data, enable);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ int ret;
+
+ /* Handle vendor set vconn */
+ if (tcpci->data->set_vconn) {
+ ret = tcpci->data->set_vconn(tcpci, tcpci->data, enable);
+ if (ret < 0)
+ return ret;
+ }
+
+ return regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL,
+ TCPC_POWER_CTRL_VCONN_ENABLE,
+ enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0);
+}
+
+static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached,
+ enum typec_role role, enum typec_data_role data)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg;
+ int ret;
+
+ reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT;
+ if (role == TYPEC_SOURCE)
+ reg |= TCPC_MSG_HDR_INFO_PWR_ROLE;
+ if (data == TYPEC_HOST)
+ reg |= TCPC_MSG_HDR_INFO_DATA_ROLE;
+ ret = regmap_write(tcpci->regmap, TCPC_MSG_HDR_INFO, reg);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int tcpci_set_pd_rx(struct tcpc_dev *tcpc, bool enable)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg = 0;
+ int ret;
+
+ if (enable)
+ reg = TCPC_RX_DETECT_SOP | TCPC_RX_DETECT_HARD_RESET;
+ ret = regmap_write(tcpci->regmap, TCPC_RX_DETECT, reg);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int tcpci_get_vbus(struct tcpc_dev *tcpc)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®);
+ if (ret < 0)
+ return ret;
+
+ return !!(reg & TCPC_POWER_STATUS_VBUS_PRES);
+}
+
+static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ int ret;
+
+ /* Disable both source and sink first before enabling anything */
+
+ if (!source) {
+ ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_DISABLE_SRC_VBUS);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (!sink) {
+ ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_DISABLE_SINK_VBUS);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (source) {
+ ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_SRC_VBUS_DEFAULT);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (sink) {
+ ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_SINK_VBUS);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tcpci_pd_transmit(struct tcpc_dev *tcpc,
+ enum tcpm_transmit_type type,
+ const struct pd_message *msg)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ u16 header = msg ? le16_to_cpu(msg->header) : 0;
+ unsigned int reg, cnt;
+ int ret;
+
+ cnt = msg ? pd_header_cnt(header) * 4 : 0;
+ ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2);
+ if (ret < 0)
+ return ret;
+
+ ret = tcpci_write16(tcpci, TCPC_TX_HDR, header);
+ if (ret < 0)
+ return ret;
+
+ if (cnt > 0) {
+ ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA,
+ &msg->payload, cnt);
+ if (ret < 0)
+ return ret;
+ }
+
+ reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) |
+ (type << TCPC_TRANSMIT_TYPE_SHIFT);
+ ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int tcpci_init(struct tcpc_dev *tcpc)
+{
+ struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+ unsigned long timeout = jiffies + msecs_to_jiffies(2000); /* XXX */
+ unsigned int reg;
+ int ret;
+ //u16 mask = 0;
+
+ while (time_before_eq(jiffies, timeout)) {
+ ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, ®);
+ if (ret < 0)
+ return ret;
+ if (!(reg & TCPC_POWER_STATUS_UNINIT))
+ break;
+ usleep_range(10000, 20000);
+ }
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ /* Handle vendor init */
+ if (tcpci->data->init) {
+ ret = tcpci->data->init(tcpci, tcpci->data);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Clear all events */
+ ret = tcpci_write16(tcpci, TCPC_ALERT, 0xffff);
+ if (ret < 0)
+ return ret;
+
+ if (tcpci->controls_vbus)
+ reg = TCPC_POWER_STATUS_VBUS_PRES;
+ else
+ reg = 0;
+ ret = regmap_write(tcpci->regmap, TCPC_POWER_STATUS_MASK, reg);
+ if (ret < 0)
+ return ret;
+
+ /* Enable Vbus detection */
+ ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+ TCPC_CMD_ENABLE_VBUS_DETECT);
+ if (ret < 0)
+ return ret;
+
+ reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED |
+ TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS |
+ TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS;
+ if (tcpci->controls_vbus)
+ reg |= TCPC_ALERT_POWER_STATUS;
+
+ //tcpci_read16(tcpci, TCPC_ALERT_MASK, &mask);
+ ret = tcpci_write16(tcpci, TCPC_ALERT_MASK, reg);
+ //tcpci_read16(tcpci, TCPC_ALERT_MASK, &mask);
+ return ret;
+}
+
+irqreturn_t tcpci_irq(struct tcpci *tcpci)
+{
+ u16 status;
+
+ tcpci_read16(tcpci, TCPC_ALERT, &status);
+
+ /*
+ * Clear alert status for everything except RX_STATUS, which shouldn't
+ * be cleared until we have successfully retrieved message.
+ */
+ if (status & ~TCPC_ALERT_RX_STATUS)
+ tcpci_write16(tcpci, TCPC_ALERT,
+ status & ~TCPC_ALERT_RX_STATUS);
+
+ if (status & TCPC_ALERT_CC_STATUS)
+ tcpm_cc_change(tcpci->port);
+
+ if (status & TCPC_ALERT_POWER_STATUS) {
+ unsigned int reg;
+
+ regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, ®);
+
+ /*
+ * If power status mask has been reset, then the TCPC
+ * has reset.
+ */
+ if (reg == 0xff)
+ tcpm_tcpc_reset(tcpci->port);
+ else
+ tcpm_vbus_change(tcpci->port);
+ }
+
+ if (status & TCPC_ALERT_RX_STATUS) {
+ struct pd_message msg;
+ unsigned int cnt;
+ u16 header;
+
+ regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt);
+
+ tcpci_read16(tcpci, TCPC_RX_HDR, &header);
+ msg.header = cpu_to_le16(header);
+
+ if (WARN_ON(cnt > sizeof(msg.payload))) {
+ pr_err("WARN_ON: cnt=%u > msg.payload=%d\n !!!!!", cnt, (int)sizeof(msg.payload));
+ cnt = sizeof(msg.payload);
+ }
+
+ if (cnt > 0)
+ regmap_raw_read(tcpci->regmap, TCPC_RX_DATA,
+ &msg.payload, cnt);
+
+ /* Read complete, clear RX status alert bit */
+ tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS);
+
+ tcpm_pd_receive(tcpci->port, &msg);
+ }
+
+ if (status & TCPC_ALERT_RX_HARD_RST)
+ tcpm_pd_hard_reset(tcpci->port);
+
+ if (status & TCPC_ALERT_TX_SUCCESS)
+ tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_SUCCESS);
+ else if (status & TCPC_ALERT_TX_DISCARDED)
+ tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_DISCARDED);
+ else if (status & TCPC_ALERT_TX_FAILED)
+ tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_FAILED);
+
+ return IRQ_HANDLED;
+}
+EXPORT_SYMBOL_GPL(tcpci_irq);
+
+static irqreturn_t _tcpci_irq(int irq, void *dev_id)
+{
+ struct tcpci_chip *chip = dev_id;
+
+ return tcpci_irq(chip->tcpci);
+}
+
+static const struct regmap_config tcpci_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0x7F, /* 0x80 .. 0xFF are vendor defined */
+};
+
+static int tcpci_parse_config(struct tcpci *tcpci)
+{
+ tcpci->controls_vbus = true; /* XXX */
+
+ tcpci->tcpc.fwnode = device_get_named_child_node(tcpci->dev,
+ "connector");
+ if (!tcpci->tcpc.fwnode) {
+ dev_err(tcpci->dev, "Can't find connector node.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
+{
+ struct tcpci *tcpci;
+ int err;
+
+ tcpci = devm_kzalloc(dev, sizeof(*tcpci), GFP_KERNEL);
+ if (!tcpci)
+ return ERR_PTR(-ENOMEM);
+
+ tcpci->dev = dev;
+ tcpci->data = data;
+ tcpci->regmap = data->regmap;
+
+ tcpci->tcpc.init = tcpci_init;
+ tcpci->tcpc.get_vbus = tcpci_get_vbus;
+ tcpci->tcpc.set_vbus = tcpci_set_vbus;
+ tcpci->tcpc.set_cc = tcpci_set_cc;
+ tcpci->tcpc.get_cc = tcpci_get_cc;
+ tcpci->tcpc.set_bist = tcpci_set_bist;
+ tcpci->tcpc.set_polarity = tcpci_set_polarity;
+ tcpci->tcpc.set_vconn = tcpci_set_vconn;
+ tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling;
+
+ tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx;
+ tcpci->tcpc.set_roles = tcpci_set_roles;
+ tcpci->tcpc.pd_transmit = tcpci_pd_transmit;
+
+ err = tcpci_parse_config(tcpci);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc);
+ if (IS_ERR(tcpci->port))
+ return ERR_CAST(tcpci->port);
+
+ return tcpci;
+}
+EXPORT_SYMBOL_GPL(tcpci_register_port);
+
+void tcpci_unregister_port(struct tcpci *tcpci)
+{
+ tcpm_unregister_port(tcpci->port);
+}
+EXPORT_SYMBOL_GPL(tcpci_unregister_port);
+
+static int tcpci_probe(struct i2c_client *client,
+ const struct i2c_device_id *i2c_id)
+{
+ struct tcpci_chip *chip;
+ int err;
+ u16 val = 0;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->data.regmap = devm_regmap_init_i2c(client, &tcpci_regmap_config);
+ if (IS_ERR(chip->data.regmap))
+ return PTR_ERR(chip->data.regmap);
+
+ i2c_set_clientdata(client, chip);
+
+ /* Disable chip interrupts before requesting irq */
+ err = regmap_raw_write(chip->data.regmap, TCPC_ALERT_MASK, &val,
+ sizeof(u16));
+ if (err < 0)
+ return err;
+
+ chip->tcpci = tcpci_register_port(&client->dev, &chip->data);
+ if (IS_ERR(chip->tcpci))
+ return PTR_ERR(chip->tcpci);
+
+ err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ _tcpci_irq,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ dev_name(&client->dev), chip);
+ if (err < 0) {
+ tcpci_unregister_port(chip->tcpci);
+ return err;
+ }
+
+ return 0;
+}
+
+static int tcpci_remove(struct i2c_client *client)
+{
+ struct tcpci_chip *chip = i2c_get_clientdata(client);
+
+ tcpci_unregister_port(chip->tcpci);
+
+ return 0;
+}
+
+static const struct i2c_device_id tcpci_id[] = {
+ { "tcpci", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tcpci_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id tcpci_of_match[] = {
+ { .compatible = "nxp,ptn5110", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tcpci_of_match);
+#endif
+
+static struct i2c_driver tcpci_i2c_driver = {
+ .driver = {
+ .name = "tcpci",
+ .of_match_table = of_match_ptr(tcpci_of_match),
+ },
+ .probe = tcpci_probe,
+ .remove = tcpci_remove,
+ .id_table = tcpci_id,
+};
+module_i2c_driver(tcpci_i2c_driver);
+
+MODULE_DESCRIPTION("USB Type-C Port Controller Interface driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Type-C Port Controller Interface.
+ */
+
+#ifndef __LINUX_USB_TCPCI_H
+#define __LINUX_USB_TCPCI_H
+
+#define TCPC_VENDOR_ID 0x0
+#define TCPC_PRODUCT_ID 0x2
+#define TCPC_BCD_DEV 0x4
+#define TCPC_TC_REV 0x6
+#define TCPC_PD_REV 0x8
+#define TCPC_PD_INT_REV 0xa
+
+#define TCPC_ALERT 0x10
+#define TCPC_ALERT_VBUS_DISCNCT BIT(11)
+#define TCPC_ALERT_RX_BUF_OVF BIT(10)
+#define TCPC_ALERT_FAULT BIT(9)
+#define TCPC_ALERT_V_ALARM_LO BIT(8)
+#define TCPC_ALERT_V_ALARM_HI BIT(7)
+#define TCPC_ALERT_TX_SUCCESS BIT(6)
+#define TCPC_ALERT_TX_DISCARDED BIT(5)
+#define TCPC_ALERT_TX_FAILED BIT(4)
+#define TCPC_ALERT_RX_HARD_RST BIT(3)
+#define TCPC_ALERT_RX_STATUS BIT(2)
+#define TCPC_ALERT_POWER_STATUS BIT(1)
+#define TCPC_ALERT_CC_STATUS BIT(0)
+
+#define TCPC_ALERT_MASK 0x12
+#define TCPC_POWER_STATUS_MASK 0x14
+#define TCPC_FAULT_STATUS_MASK 0x15
+#define TCPC_CONFIG_STD_OUTPUT 0x18
+
+#define TCPC_TCPC_CTRL 0x19
+#define TCPC_TCPC_CTRL_ORIENTATION BIT(0)
+
+#define TCPC_ROLE_CTRL 0x1a
+#define TCPC_ROLE_CTRL_DRP BIT(6)
+#define TCPC_ROLE_CTRL_RP_VAL_SHIFT 4
+#define TCPC_ROLE_CTRL_RP_VAL_MASK 0x3
+#define TCPC_ROLE_CTRL_RP_VAL_DEF 0x0
+#define TCPC_ROLE_CTRL_RP_VAL_1_5 0x1
+#define TCPC_ROLE_CTRL_RP_VAL_3_0 0x2
+#define TCPC_ROLE_CTRL_CC2_SHIFT 2
+#define TCPC_ROLE_CTRL_CC2_MASK 0x3
+#define TCPC_ROLE_CTRL_CC1_SHIFT 0
+#define TCPC_ROLE_CTRL_CC1_MASK 0x3
+#define TCPC_ROLE_CTRL_CC_RA 0x0
+#define TCPC_ROLE_CTRL_CC_RP 0x1
+#define TCPC_ROLE_CTRL_CC_RD 0x2
+#define TCPC_ROLE_CTRL_CC_OPEN 0x3
+
+#define TCPC_FAULT_CTRL 0x1b
+
+#define TCPC_POWER_CTRL 0x1c
+#define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0)
+
+#define TCPC_CC_STATUS 0x1d
+#define TCPC_CC_STATUS_TOGGLING BIT(5)
+#define TCPC_CC_STATUS_TERM BIT(4)
+#define TCPC_CC_STATUS_CC2_SHIFT 2
+#define TCPC_CC_STATUS_CC2_MASK 0x3
+#define TCPC_CC_STATUS_CC1_SHIFT 0
+#define TCPC_CC_STATUS_CC1_MASK 0x3
+
+#define TCPC_POWER_STATUS 0x1e
+#define TCPC_POWER_STATUS_UNINIT BIT(6)
+#define TCPC_POWER_STATUS_VBUS_DET BIT(3)
+#define TCPC_POWER_STATUS_VBUS_PRES BIT(2)
+
+#define TCPC_FAULT_STATUS 0x1f
+
+#define TCPC_COMMAND 0x23
+#define TCPC_CMD_WAKE_I2C 0x11
+#define TCPC_CMD_DISABLE_VBUS_DETECT 0x22
+#define TCPC_CMD_ENABLE_VBUS_DETECT 0x33
+#define TCPC_CMD_DISABLE_SINK_VBUS 0x44
+#define TCPC_CMD_SINK_VBUS 0x55
+#define TCPC_CMD_DISABLE_SRC_VBUS 0x66
+#define TCPC_CMD_SRC_VBUS_DEFAULT 0x77
+#define TCPC_CMD_SRC_VBUS_HIGH 0x88
+#define TCPC_CMD_LOOK4CONNECTION 0x99
+#define TCPC_CMD_RXONEMORE 0xAA
+#define TCPC_CMD_I2C_IDLE 0xFF
+
+#define TCPC_DEV_CAP_1 0x24
+#define TCPC_DEV_CAP_2 0x26
+#define TCPC_STD_INPUT_CAP 0x28
+#define TCPC_STD_OUTPUT_CAP 0x29
+
+#define TCPC_MSG_HDR_INFO 0x2e
+#define TCPC_MSG_HDR_INFO_DATA_ROLE BIT(3)
+#define TCPC_MSG_HDR_INFO_PWR_ROLE BIT(0)
+#define TCPC_MSG_HDR_INFO_REV_SHIFT 1
+#define TCPC_MSG_HDR_INFO_REV_MASK 0x3
+
+#define TCPC_RX_DETECT 0x2f
+#define TCPC_RX_DETECT_HARD_RESET BIT(5)
+#define TCPC_RX_DETECT_SOP BIT(0)
+
+#define TCPC_RX_BYTE_CNT 0x30
+#define TCPC_RX_BUF_FRAME_TYPE 0x31
+#define TCPC_RX_HDR 0x32
+#define TCPC_RX_DATA 0x34 /* through 0x4f */
+
+#define TCPC_TRANSMIT 0x50
+#define TCPC_TRANSMIT_RETRY_SHIFT 4
+#define TCPC_TRANSMIT_RETRY_MASK 0x3
+#define TCPC_TRANSMIT_TYPE_SHIFT 0
+#define TCPC_TRANSMIT_TYPE_MASK 0x7
+
+#define TCPC_TX_BYTE_CNT 0x51
+#define TCPC_TX_HDR 0x52
+#define TCPC_TX_DATA 0x54 /* through 0x6f */
+
+#define TCPC_VBUS_VOLTAGE 0x70
+#define TCPC_VBUS_SINK_DISCONNECT_THRESH 0x72
+#define TCPC_VBUS_STOP_DISCHARGE_THRESH 0x74
+#define TCPC_VBUS_VOLTAGE_ALARM_HI_CFG 0x76
+#define TCPC_VBUS_VOLTAGE_ALARM_LO_CFG 0x78
+
+struct tcpci;
+struct tcpci_data {
+ struct regmap *regmap;
+ int (*init)(struct tcpci *tcpci, struct tcpci_data *data);
+ int (*get_cc)(struct tcpci *tcpci, struct tcpci_data *data,
+ enum typec_cc_status *cc1, enum typec_cc_status *cc2);
+ int (*set_bist)(struct tcpci *tcpci, struct tcpci_data *data,
+ bool enable);
+ int (*set_polarity)(struct tcpci *tcpci, struct tcpci_data *data,
+ enum typec_cc_polarity polarity);
+ int (*set_vconn)(struct tcpci *tcpci, struct tcpci_data *data,
+ bool enable);
+ int (*start_drp_toggling)(struct tcpci *tcpci, struct tcpci_data *data,
+ enum typec_cc_status cc);
+};
+
+struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
+void tcpci_unregister_port(struct tcpci *tcpci);
+irqreturn_t tcpci_irq(struct tcpci *tcpci);
+
+#endif /* __LINUX_USB_TCPCI_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Richtek Technology Corporation
+ *
+ * Richtek RT1711H Type-C Chip Driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/usb/tcpm.h>
+#include <linux/regmap.h>
+#include "tcpci.h"
+
+#define RT1711H_VID 0x29CF
+#define RT1711H_PID 0x1711
+#define RT1711H_DID_D 0x2173
+
+#define RT1711H_RTCTRL8 0x9B
+
+/* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
+#define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \
+ (((ck300) << 7) | ((ship_off) << 5) | \
+ ((auto_idle) << 3) | ((tout) & 0x07))
+
+#define RT1711H_RTCTRL11 0x9E
+
+/* I2C timeout = (tout + 1) * 12.5ms */
+#define RT1711H_RTCTRL11_SET(en, tout) \
+ (((en) << 7) | ((tout) & 0x0F))
+
+#define RT1711H_RTRXDZSEL 0x93
+#define RT1711H_RTCTRL13 0xA0
+#define RT1711H_RTCTRL14 0xA1
+#define RT1711H_RTCTRL15 0xA2
+#define RT1711H_RTCTRL16 0xA3
+#define RT1711H_RTRXDZEN 0xAF
+
+/* Port controller BIST TESTDATA mode support */
+#define RT1711H_CTRL_BIST_EN BIT(1)
+
+/* 1: use gpios element to look up IRQ number. 0: use interrupts element. */
+#define USE_GPIOS_INTR 1
+
+struct rt1711h_chip {
+ struct tcpci_data data;
+ struct tcpci *tcpci;
+ struct device *dev;
+ u16 chip_id;
+ u8 deadzone_enable;
+ u8 deadzone_select;
+ u8 en_bist;
+#if USE_GPIOS_INTR
+ int gpio_int_n_irq;
+#endif
+};
+
+static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
+{
+ return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
+}
+
+static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val)
+{
+ return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
+}
+
+static int rt1711h_read8(struct rt1711h_chip *chip, unsigned int reg, u8 *val)
+{
+ return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
+}
+
+static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val)
+{
+ return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
+}
+
+static const struct regmap_config rt1711h_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */
+};
+
+static struct rt1711h_chip *tdata_to_rt1711h(struct tcpci_data *tdata)
+{
+ return container_of(tdata, struct rt1711h_chip, data);
+}
+
+static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
+{
+ int ret;
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+
+ /* Clear BIST TESTDATA mode */
+ chip->en_bist = 0;
+
+ /* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */
+ ret = rt1711h_write8(chip, RT1711H_RTCTRL8,
+ RT1711H_RTCTRL8_SET(0, 1, 1, 2));
+ if (ret < 0)
+ return ret;
+
+ /* I2C reset : (val + 1) * 12.5ms */
+ ret = rt1711h_write8(chip, RT1711H_RTCTRL11,
+ RT1711H_RTCTRL11_SET(1, 0x0F));
+ if (ret < 0)
+ return ret;
+
+ /* tTCPCfilter : (26.7 * val) us */
+ ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F);
+ if (ret < 0)
+ return ret;
+
+ /* tDRP : (51.2 + 6.4 * val) ms */
+ ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04);
+ if (ret < 0)
+ return ret;
+
+ /* dcSRC.DRP : 33% */
+ return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
+}
+
+static enum typec_cc_status rt1711h_reg_to_cc(unsigned int cc, bool sink)
+{
+ switch (cc) {
+ case 1:
+ return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RD;
+ case 2:
+ return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RA;
+ case 3:
+ return sink ? TYPEC_CC_RP_3_0 : TYPEC_CC_OPEN;
+ default:
+ return TYPEC_CC_OPEN;
+ }
+}
+
+static int rt1711h_get_cc(struct tcpci *tcpci, struct tcpci_data *tdata,
+ enum typec_cc_status *cc1, enum typec_cc_status *cc2)
+{
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+ u8 reg, cc1_state, cc2_state;
+ bool cc1_sink, cc2_sink, tcpc_presenting_rd;
+ enum typec_cc_status cc;
+ u8 sel;
+ int ret;
+
+ /* Read CC1 & CC2 ROLE */
+ ret = rt1711h_read8(chip, TCPC_ROLE_CTRL, ®);
+ if (ret < 0)
+ return ret;
+
+ cc1_sink = ((reg >> TCPC_ROLE_CTRL_CC1_SHIFT) &
+ TCPC_ROLE_CTRL_CC1_MASK) == TCPC_ROLE_CTRL_CC_RD;
+ cc2_sink = ((reg >> TCPC_ROLE_CTRL_CC2_SHIFT) &
+ TCPC_ROLE_CTRL_CC2_MASK) == TCPC_ROLE_CTRL_CC_RD;
+ /* Read CC STATUS */
+ ret = rt1711h_read8(chip, TCPC_CC_STATUS, ®);
+ if (ret < 0)
+ return ret;
+
+ /* When auto toggling, BIT(4) is set on presenting Rd */
+ tcpc_presenting_rd = !!(reg & TCPC_CC_STATUS_TERM);
+ cc1_sink |= tcpc_presenting_rd;
+ cc2_sink |= tcpc_presenting_rd;
+ cc1_state = (reg >> TCPC_CC_STATUS_CC1_SHIFT) & TCPC_CC_STATUS_CC1_MASK;
+ cc2_state = (reg >> TCPC_CC_STATUS_CC2_SHIFT) & TCPC_CC_STATUS_CC2_MASK;
+
+ *cc1 = rt1711h_reg_to_cc(cc1_state, cc1_sink);
+ *cc2 = rt1711h_reg_to_cc(cc2_state, cc2_sink);
+
+ /* Set RT1711H deadzone */
+ cc = (*cc1 == TYPEC_CC_OPEN) ? *cc2 : *cc1;
+
+ if (cc == TYPEC_CC_RP_DEF) {
+ if (chip->deadzone_enable != 0) {
+ chip->deadzone_enable = 0;
+ rt1711h_write8(chip, RT1711H_RTRXDZEN, 0);
+ }
+ if (chip->deadzone_select != 0x81) {
+ chip->deadzone_select = 0x81;
+ rt1711h_write8(chip, RT1711H_RTRXDZSEL, 0x81);
+ }
+ } else {
+ sel = (chip->chip_id >= RT1711H_DID_D) ? 0x81 : 0x80;
+ if (chip->deadzone_enable != 1) {
+ chip->deadzone_enable = 1;
+ rt1711h_write8(chip, RT1711H_RTRXDZEN, 1);
+ }
+ if (chip->deadzone_select != sel) {
+ chip->deadzone_select = sel;
+ rt1711h_write8(chip, RT1711H_RTRXDZSEL, sel);
+ }
+ }
+
+ return 0;
+}
+
+static int rt1711h_set_polarity(struct tcpci *tcpci, struct tcpci_data *tdata,
+ enum typec_cc_polarity polarity)
+{
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+ u8 reg;
+
+ /* Polarity */
+ reg = (polarity == TYPEC_POLARITY_CC2) ?
+ TCPC_TCPC_CTRL_ORIENTATION : 0;
+ /* HW BIST feature */
+ reg |= chip->en_bist ? RT1711H_CTRL_BIST_EN : 0;
+
+ return rt1711h_write8(chip, TCPC_TCPC_CTRL, reg);
+}
+
+static int rt1711h_set_bist(struct tcpci *tcpci, struct tcpci_data *tdata,
+ bool enable)
+{
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+ int ret;
+ u8 reg;
+
+ ret = rt1711h_read8(chip, TCPC_TCPC_CTRL, ®);
+ if (ret)
+ return ret;
+
+ if (enable)
+ reg |= RT1711H_CTRL_BIST_EN;
+ else
+ reg &= ~RT1711H_CTRL_BIST_EN;
+
+ ret = rt1711h_write8(chip, TCPC_TCPC_CTRL, reg);
+ if (!ret)
+ chip->en_bist = enable;
+
+ return ret;
+}
+
+static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
+ bool enable)
+{
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+
+ return rt1711h_write8(chip, RT1711H_RTCTRL8,
+ RT1711H_RTCTRL8_SET(0, 1, !enable, 2));
+}
+
+static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
+ struct tcpci_data *tdata,
+ enum typec_cc_status cc)
+{
+ struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+ int ret;
+ unsigned int reg = 0;
+
+ switch (cc) {
+ default:
+ case TYPEC_CC_RP_DEF:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_1_5:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ case TYPEC_CC_RP_3_0:
+ reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
+ TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ break;
+ }
+
+ if (cc == TYPEC_CC_RD)
+ reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ else
+ reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+ (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
+
+ ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg);
+ if (ret < 0)
+ return ret;
+ usleep_range(500, 1000);
+
+ return 0;
+}
+
+static irqreturn_t rt1711h_irq(int irq, void *dev_id)
+{
+ int ret;
+ u16 alert;
+ u8 status;
+ struct rt1711h_chip *chip = dev_id;
+
+ if (!chip->tcpci)
+ return IRQ_HANDLED;
+
+ ret = rt1711h_read16(chip, TCPC_ALERT, &alert);
+ if (ret < 0)
+ goto out;
+
+ if (alert & TCPC_ALERT_CC_STATUS) {
+ ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status);
+ if (ret < 0)
+ goto out;
+ /* Clear cc change event triggered by starting toggling */
+ if (status & TCPC_CC_STATUS_TOGGLING)
+ rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS);
+ }
+
+out:
+ return tcpci_irq(chip->tcpci);
+}
+
+static int rt1711h_init_alert(struct rt1711h_chip *chip,
+ struct i2c_client *client)
+{
+ int ret;
+#if USE_GPIOS_INTR
+ struct gpio_desc *desc;
+ int id_irqnr;
+#endif
+
+ /* Disable chip interrupts before requesting irq */
+ ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0);
+ if (ret < 0)
+ return ret;
+
+#if USE_GPIOS_INTR
+ desc = gpiod_get_index(chip->dev, NULL, 0, GPIOD_IN);
+ if (IS_ERR(desc)) {
+ pr_err("fail to get id-gpioirq\n");
+ return -1;
+ }
+ id_irqnr = gpiod_to_irq(desc);
+
+ ret = devm_request_threaded_irq(chip->dev, id_irqnr, NULL,
+ rt1711h_irq,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ "rt1711h_interrupt_int_n", chip);
+ if (ret) {
+ pr_err("failed to request ret=%d, id_irqnr=%d\n",
+ ret, id_irqnr);
+ return ret;
+ }
+ chip->gpio_int_n_irq = id_irqnr;
+ pr_info("<%s> ok\n", __func__);
+ enable_irq_wake(id_irqnr);
+ return 0;
+#else
+ ret = devm_request_threaded_irq(chip->dev, client->irq, NULL,
+ rt1711h_irq,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ dev_name(chip->dev), chip);
+ if (ret < 0)
+ return ret;
+ enable_irq_wake(client->irq);
+ return 0;
+#endif
+}
+
+static int rt1711h_sw_reset(struct rt1711h_chip *chip)
+{
+ int ret;
+
+ ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 2000);
+ return 0;
+}
+
+static int rt1711h_check_revision(struct i2c_client *i2c)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID);
+ if (ret < 0)
+ return ret;
+ if (ret != RT1711H_VID) {
+ dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret);
+ return -ENODEV;
+ }
+ ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID);
+ if (ret < 0)
+ return ret;
+ if (ret != RT1711H_PID) {
+ dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int rt1711h_probe(struct i2c_client *client,
+ const struct i2c_device_id *i2c_id)
+{
+ int ret;
+ struct rt1711h_chip *chip;
+ u16 chip_id;
+
+ ret = rt1711h_check_revision(client);
+ if (ret < 0) {
+ dev_err(&client->dev, "check vid/pid fail\n");
+ return ret;
+ }
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->data.regmap = devm_regmap_init_i2c(client,
+ &rt1711h_regmap_config);
+ if (IS_ERR(chip->data.regmap))
+ return PTR_ERR(chip->data.regmap);
+
+ chip->dev = &client->dev;
+ i2c_set_clientdata(client, chip);
+
+ ret = rt1711h_sw_reset(chip);
+ if (ret < 0)
+ return ret;
+
+ /* Get device id and initialize deadzone */
+ ret = rt1711h_read16(chip, TCPC_BCD_DEV, &chip_id);
+ if (ret < 0)
+ return ret;
+ chip->chip_id = chip_id;
+ ret = rt1711h_read8(chip, RT1711H_RTRXDZEN, &chip->deadzone_enable);
+ if (ret < 0)
+ return ret;
+ ret = rt1711h_read8(chip, RT1711H_RTRXDZSEL, &chip->deadzone_select);
+ if (ret < 0)
+ return ret;
+
+ ret = rt1711h_init_alert(chip, client);
+ if (ret < 0)
+ return ret;
+
+ chip->data.init = rt1711h_init;
+ chip->data.get_cc = rt1711h_get_cc;
+ chip->data.set_bist = rt1711h_set_bist;
+ chip->data.set_polarity = rt1711h_set_polarity;
+ chip->data.set_vconn = rt1711h_set_vconn;
+ chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
+ chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
+ if (IS_ERR_OR_NULL(chip->tcpci))
+ return PTR_ERR(chip->tcpci);
+
+ return 0;
+}
+
+static int rt1711h_remove(struct i2c_client *client)
+{
+ struct rt1711h_chip *chip = i2c_get_clientdata(client);
+
+ tcpci_unregister_port(chip->tcpci);
+ return 0;
+}
+
+static const struct i2c_device_id rt1711h_id[] = {
+ { "rt1711h", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, rt1711h_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id rt1711h_of_match[] = {
+ { .compatible = "richtek,rt1711h", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, rt1711h_of_match);
+#endif
+
+static struct i2c_driver rt1711h_i2c_driver = {
+ .driver = {
+ .name = "rt1711h",
+ .of_match_table = of_match_ptr(rt1711h_of_match),
+ },
+ .probe = rt1711h_probe,
+ .remove = rt1711h_remove,
+ .id_table = rt1711h_id,
+};
+module_i2c_driver(rt1711h_i2c_driver);
+
+MODULE_AUTHOR("ShuFan Lee <shufan_lee@richtek.com>");
+MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Power Delivery protocol stack.
+ */
+
+#include <linux/completion.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/power_supply.h>
+#include <linux/proc_fs.h>
+#include <linux/property.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/pd_ado.h>
+#include <linux/usb/pd_bdo.h>
+#include <linux/usb/pd_ext_sdb.h>
+#include <linux/usb/pd_vdo.h>
+#include <linux/usb/role.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec_altmode.h>
+#include <linux/workqueue.h>
+
+#define FOREACH_STATE(S) \
+ S(INVALID_STATE), \
+ S(DRP_TOGGLING), \
+ S(SRC_UNATTACHED), \
+ S(SRC_ATTACH_WAIT), \
+ S(SRC_ATTACHED), \
+ S(SRC_STARTUP), \
+ S(SRC_SEND_CAPABILITIES), \
+ S(SRC_NEGOTIATE_CAPABILITIES), \
+ S(SRC_TRANSITION_SUPPLY), \
+ S(SRC_READY), \
+ S(SRC_WAIT_NEW_CAPABILITIES), \
+ \
+ S(SNK_UNATTACHED), \
+ S(SNK_ATTACH_WAIT), \
+ S(SNK_DEBOUNCED), \
+ S(SNK_ATTACHED), \
+ S(SNK_STARTUP), \
+ S(SNK_DISCOVERY), \
+ S(SNK_DISCOVERY_DEBOUNCE), \
+ S(SNK_DISCOVERY_DEBOUNCE_DONE), \
+ S(SNK_WAIT_CAPABILITIES), \
+ S(SNK_NEGOTIATE_CAPABILITIES), \
+ S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
+ S(SNK_TRANSITION_SINK), \
+ S(SNK_TRANSITION_SINK_VBUS), \
+ S(SNK_READY), \
+ \
+ S(ACC_UNATTACHED), \
+ S(DEBUG_ACC_ATTACHED), \
+ S(AUDIO_ACC_ATTACHED), \
+ S(AUDIO_ACC_DEBOUNCE), \
+ \
+ S(HARD_RESET_SEND), \
+ S(HARD_RESET_START), \
+ S(SRC_HARD_RESET_VBUS_OFF), \
+ S(SRC_HARD_RESET_VBUS_ON), \
+ S(SNK_HARD_RESET_SINK_OFF), \
+ S(SNK_HARD_RESET_WAIT_VBUS), \
+ S(SNK_HARD_RESET_SINK_ON), \
+ \
+ S(SOFT_RESET), \
+ S(SOFT_RESET_SEND), \
+ \
+ S(DR_SWAP_ACCEPT), \
+ S(DR_SWAP_SEND), \
+ S(DR_SWAP_SEND_TIMEOUT), \
+ S(DR_SWAP_CANCEL), \
+ S(DR_SWAP_CHANGE_DR), \
+ \
+ S(PR_SWAP_ACCEPT), \
+ S(PR_SWAP_SEND), \
+ S(PR_SWAP_SEND_TIMEOUT), \
+ S(PR_SWAP_CANCEL), \
+ S(PR_SWAP_START), \
+ S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
+ S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
+ S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
+ S(PR_SWAP_SRC_SNK_SINK_ON), \
+ S(PR_SWAP_SNK_SRC_SINK_OFF), \
+ S(PR_SWAP_SNK_SRC_SOURCE_ON), \
+ S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
+ \
+ S(VCONN_SWAP_ACCEPT), \
+ S(VCONN_SWAP_SEND), \
+ S(VCONN_SWAP_SEND_TIMEOUT), \
+ S(VCONN_SWAP_CANCEL), \
+ S(VCONN_SWAP_START), \
+ S(VCONN_SWAP_WAIT_FOR_VCONN), \
+ S(VCONN_SWAP_TURN_ON_VCONN), \
+ S(VCONN_SWAP_TURN_OFF_VCONN), \
+ \
+ S(SNK_TRY), \
+ S(SNK_TRY_WAIT), \
+ S(SNK_TRY_WAIT_DEBOUNCE), \
+ S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
+ S(SRC_TRYWAIT), \
+ S(SRC_TRYWAIT_DEBOUNCE), \
+ S(SRC_TRYWAIT_UNATTACHED), \
+ \
+ S(SRC_TRY), \
+ S(SRC_TRY_WAIT), \
+ S(SRC_TRY_DEBOUNCE), \
+ S(SNK_TRYWAIT), \
+ S(SNK_TRYWAIT_DEBOUNCE), \
+ S(SNK_TRYWAIT_VBUS), \
+ S(BIST_RX), \
+ \
+ S(GET_STATUS_SEND), \
+ S(GET_STATUS_SEND_TIMEOUT), \
+ S(GET_PPS_STATUS_SEND), \
+ S(GET_PPS_STATUS_SEND_TIMEOUT), \
+ \
+ S(ERROR_RECOVERY), \
+ S(PORT_RESET), \
+ S(PORT_RESET_WAIT_OFF)
+
+#define GENERATE_ENUM(e) e
+#define GENERATE_STRING(s) #s
+
+enum tcpm_state {
+ FOREACH_STATE(GENERATE_ENUM)
+};
+
+static const char * const tcpm_states[] = {
+ FOREACH_STATE(GENERATE_STRING)
+};
+
+enum vdm_states {
+ VDM_STATE_ERR_BUSY = -3,
+ VDM_STATE_ERR_SEND = -2,
+ VDM_STATE_ERR_TMOUT = -1,
+ VDM_STATE_DONE = 0,
+ /* Anything >0 represents an active state */
+ VDM_STATE_READY = 1,
+ VDM_STATE_BUSY = 2,
+ VDM_STATE_WAIT_RSP_BUSY = 3,
+};
+
+enum pd_msg_request {
+ PD_MSG_NONE = 0,
+ PD_MSG_CTRL_REJECT,
+ PD_MSG_CTRL_WAIT,
+ PD_MSG_CTRL_NOT_SUPP,
+ PD_MSG_DATA_SINK_CAP,
+ PD_MSG_DATA_SOURCE_CAP,
+};
+
+/* Events from low level driver */
+
+#define TCPM_CC_EVENT BIT(0)
+#define TCPM_VBUS_EVENT BIT(1)
+#define TCPM_RESET_EVENT BIT(2)
+
+#define LOG_BUFFER_ENTRIES 1024
+#define LOG_BUFFER_ENTRY_SIZE 128
+
+/* Alternate mode support */
+
+#define SVID_DISCOVERY_MAX 16
+#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
+
+struct pd_mode_data {
+ int svid_index; /* current SVID index */
+ int nsvids;
+ u16 svids[SVID_DISCOVERY_MAX];
+ int altmodes; /* number of alternate modes */
+ struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
+};
+
+struct pd_pps_data {
+ u32 min_volt;
+ u32 max_volt;
+ u32 max_curr;
+ u32 out_volt;
+ u32 op_curr;
+ bool supported;
+ bool active;
+};
+
+struct tcpm_port {
+ struct device *dev;
+
+ struct mutex lock; /* tcpm state machine lock */
+ struct workqueue_struct *wq;
+
+ struct typec_capability typec_caps;
+ struct typec_port *typec_port;
+
+ struct tcpc_dev *tcpc;
+ struct usb_role_switch *role_sw;
+
+ enum typec_role vconn_role;
+ enum typec_role pwr_role;
+ enum typec_data_role data_role;
+ enum typec_pwr_opmode pwr_opmode;
+
+ struct usb_pd_identity partner_ident;
+ struct typec_partner_desc partner_desc;
+ struct typec_partner *partner;
+
+ enum typec_cc_status cc_req;
+
+ enum typec_cc_status cc1;
+ enum typec_cc_status cc2;
+ enum typec_cc_polarity polarity;
+
+ bool attached;
+ bool connected;
+ enum typec_port_type port_type;
+ bool vbus_present;
+ bool vbus_never_low;
+ bool vbus_source;
+ bool vbus_charge;
+
+ bool send_discover;
+ bool op_vsafe5v;
+
+ int try_role;
+ int try_snk_count;
+ int try_src_count;
+
+ enum pd_msg_request queued_message;
+
+ enum tcpm_state enter_state;
+ enum tcpm_state prev_state;
+ enum tcpm_state state;
+ enum tcpm_state delayed_state;
+ unsigned long delayed_runtime;
+ unsigned long delay_ms;
+
+ spinlock_t pd_event_lock;
+ u32 pd_events;
+
+ struct work_struct event_work;
+ struct delayed_work state_machine;
+ struct delayed_work vdm_state_machine;
+ bool state_machine_running;
+
+ struct completion tx_complete;
+ enum tcpm_transmit_status tx_status;
+
+ struct mutex swap_lock; /* swap command lock */
+ bool swap_pending;
+ bool non_pd_role_swap;
+ struct completion swap_complete;
+ int swap_status;
+
+ unsigned int negotiated_rev;
+ unsigned int message_id;
+ unsigned int caps_count;
+ unsigned int hard_reset_count;
+ bool pd_capable;
+ bool explicit_contract;
+ unsigned int rx_msgid;
+
+ /* Partner capabilities/requests */
+ u32 sink_request;
+ u32 source_caps[PDO_MAX_OBJECTS];
+ unsigned int nr_source_caps;
+ u32 sink_caps[PDO_MAX_OBJECTS];
+ unsigned int nr_sink_caps;
+
+ /* Local capabilities */
+ u32 src_pdo[PDO_MAX_OBJECTS];
+ unsigned int nr_src_pdo;
+ u32 snk_pdo[PDO_MAX_OBJECTS];
+ unsigned int nr_snk_pdo;
+ u32 snk_vdo[VDO_MAX_OBJECTS];
+ unsigned int nr_snk_vdo;
+
+ unsigned int operating_snk_mw;
+ bool update_sink_caps;
+
+ /* Requested current / voltage */
+ u32 current_limit;
+ u32 supply_voltage;
+
+ /* Used to export TA voltage and current */
+ struct power_supply *psy;
+ struct power_supply_desc psy_desc;
+ enum power_supply_usb_type usb_type;
+
+ u32 bist_request;
+
+ /* PD state for Vendor Defined Messages */
+ enum vdm_states vdm_state;
+ u32 vdm_retries;
+ /* next Vendor Defined Message to send */
+ u32 vdo_data[VDO_MAX_SIZE];
+ u8 vdo_count;
+ /* VDO to retry if UFP responder replied busy */
+ u32 vdo_retry;
+
+ /* PPS */
+ struct pd_pps_data pps_data;
+ struct completion pps_complete;
+ bool pps_pending;
+ int pps_status;
+
+ /* Alternate mode data */
+ struct pd_mode_data mode_data;
+ struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
+ struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
+
+ /* Deadline in jiffies to exit src_try_wait state */
+ unsigned long max_wait;
+
+ /* port belongs to a self powered device */
+ bool self_powered;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *dentry;
+ struct mutex logbuffer_lock; /* log buffer access lock */
+ int logbuffer_head;
+ int logbuffer_tail;
+ u8 *logbuffer[LOG_BUFFER_ENTRIES];
+#endif
+};
+
+struct pd_rx_event {
+ struct work_struct work;
+ struct tcpm_port *port;
+ struct pd_message msg;
+};
+
+#define tcpm_cc_is_sink(cc) \
+ ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
+ (cc) == TYPEC_CC_RP_3_0)
+
+#define tcpm_port_is_sink(port) \
+ ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
+ (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
+
+#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
+#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
+#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
+
+#define tcpm_port_is_source(port) \
+ ((tcpm_cc_is_source((port)->cc1) && \
+ !tcpm_cc_is_source((port)->cc2)) || \
+ (tcpm_cc_is_source((port)->cc2) && \
+ !tcpm_cc_is_source((port)->cc1)))
+
+#define tcpm_port_is_debug(port) \
+ (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
+
+#define tcpm_port_is_audio(port) \
+ (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
+
+#define tcpm_port_is_audio_detached(port) \
+ ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
+ (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
+
+#define tcpm_try_snk(port) \
+ ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
+ (port)->port_type == TYPEC_PORT_DRP)
+
+#define tcpm_try_src(port) \
+ ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
+ (port)->port_type == TYPEC_PORT_DRP)
+
+static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
+{
+ if (port->port_type == TYPEC_PORT_DRP) {
+ if (port->try_role == TYPEC_SINK)
+ return SNK_UNATTACHED;
+ else if (port->try_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ else if (port->tcpc->config &&
+ port->tcpc->config->default_role == TYPEC_SINK)
+ return SNK_UNATTACHED;
+ /* Fall through to return SRC_UNATTACHED */
+ } else if (port->port_type == TYPEC_PORT_SNK) {
+ return SNK_UNATTACHED;
+ }
+ return SRC_UNATTACHED;
+}
+
+static inline
+struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
+{
+ return container_of(cap, struct tcpm_port, typec_caps);
+}
+
+static bool tcpm_port_is_disconnected(struct tcpm_port *port)
+{
+ return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN) ||
+ (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
+ port->cc1 == TYPEC_CC_OPEN) ||
+ (port->polarity == TYPEC_POLARITY_CC2 &&
+ port->cc2 == TYPEC_CC_OPEN)));
+}
+
+/*
+ * Logging
+ */
+
+#ifdef CONFIG_DEBUG_FS
+
+static bool tcpm_log_full(struct tcpm_port *port)
+{
+ return port->logbuffer_tail ==
+ (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+}
+
+__printf(2, 0)
+static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
+{
+ char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
+ u64 ts_nsec = local_clock();
+ unsigned long rem_nsec;
+
+ mutex_lock(&port->logbuffer_lock);
+ if (!port->logbuffer[port->logbuffer_head]) {
+ port->logbuffer[port->logbuffer_head] =
+ kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
+ if (!port->logbuffer[port->logbuffer_head]) {
+ mutex_unlock(&port->logbuffer_lock);
+ return;
+ }
+ }
+
+ vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
+
+ if (tcpm_log_full(port)) {
+ port->logbuffer_head = max(port->logbuffer_head - 1, 0);
+ strcpy(tmpbuffer, "overflow");
+ }
+
+ if (port->logbuffer_head < 0 ||
+ port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
+ dev_warn(port->dev,
+ "Bad log buffer index %d\n", port->logbuffer_head);
+ goto abort;
+ }
+
+ if (!port->logbuffer[port->logbuffer_head]) {
+ dev_warn(port->dev,
+ "Log buffer index %d is NULL\n", port->logbuffer_head);
+ goto abort;
+ }
+
+ rem_nsec = do_div(ts_nsec, 1000000000);
+ scnprintf(port->logbuffer[port->logbuffer_head],
+ LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
+ (unsigned long)ts_nsec, rem_nsec / 1000,
+ tmpbuffer);
+ port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+
+abort:
+ mutex_unlock(&port->logbuffer_lock);
+}
+
+__printf(2, 3)
+static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
+{
+ va_list args;
+
+ /* Do not log while disconnected and unattached */
+ if (tcpm_port_is_disconnected(port) &&
+ (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
+ port->state == DRP_TOGGLING))
+ return;
+
+ va_start(args, fmt);
+ _tcpm_log(port, fmt, args);
+ va_end(args);
+}
+
+__printf(2, 3)
+static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ _tcpm_log(port, fmt, args);
+ va_end(args);
+}
+
+static unsigned int tcpm_get_max_fixed_current(struct tcpm_port *port)
+{
+ int i;
+ unsigned int max_current_ma = 0;
+
+ for (i = 0; i < port->nr_source_caps; i++) {
+ u32 pdo = port->source_caps[i];
+ enum pd_pdo_type type = pdo_type(pdo);
+ unsigned int pdo_current_ma;
+
+ if (type != PDO_TYPE_FIXED)
+ continue;
+ if (pdo_fixed_voltage(pdo) < port->supply_voltage)
+ continue;
+
+ pdo_current_ma = pdo_max_current(pdo);
+ if (pdo_current_ma > max_current_ma)
+ max_current_ma = pdo_current_ma;
+ }
+
+ return max_current_ma;
+}
+
+static void tcpm_log_source_caps(struct tcpm_port *port)
+{
+ int i;
+
+ for (i = 0; i < port->nr_source_caps; i++) {
+ u32 pdo = port->source_caps[i];
+ enum pd_pdo_type type = pdo_type(pdo);
+ char msg[64];
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ scnprintf(msg, sizeof(msg),
+ "%u mV, %u mA [%s%s%s%s%s%s]",
+ pdo_fixed_voltage(pdo),
+ pdo_max_current(pdo),
+ (pdo & PDO_FIXED_DUAL_ROLE) ?
+ "R" : "",
+ (pdo & PDO_FIXED_SUSPEND) ?
+ "S" : "",
+ (pdo & PDO_FIXED_HIGHER_CAP) ?
+ "H" : "",
+ (pdo & PDO_FIXED_USB_COMM) ?
+ "U" : "",
+ (pdo & PDO_FIXED_DATA_SWAP) ?
+ "D" : "",
+ (pdo & PDO_FIXED_EXTPOWER) ?
+ "E" : "");
+ break;
+ case PDO_TYPE_VAR:
+ scnprintf(msg, sizeof(msg),
+ "%u-%u mV, %u mA",
+ pdo_min_voltage(pdo),
+ pdo_max_voltage(pdo),
+ pdo_max_current(pdo));
+ break;
+ case PDO_TYPE_BATT:
+ scnprintf(msg, sizeof(msg),
+ "%u-%u mV, %u mW",
+ pdo_min_voltage(pdo),
+ pdo_max_voltage(pdo),
+ pdo_max_power(pdo));
+ break;
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
+ scnprintf(msg, sizeof(msg),
+ "%u-%u mV, %u mA",
+ pdo_pps_apdo_min_voltage(pdo),
+ pdo_pps_apdo_max_voltage(pdo),
+ pdo_pps_apdo_max_current(pdo));
+ else
+ strcpy(msg, "undefined APDO");
+ break;
+ default:
+ strcpy(msg, "undefined");
+ break;
+ }
+ tcpm_log(port, " PDO %d: type %d, %s",
+ i, type, msg);
+ }
+}
+
+static int tcpm_debug_show(struct seq_file *s, void *v)
+{
+ struct tcpm_port *port = (struct tcpm_port *)s->private;
+ int tail;
+
+ mutex_lock(&port->logbuffer_lock);
+ tail = port->logbuffer_tail;
+ while (tail != port->logbuffer_head) {
+ seq_printf(s, "%s\n", port->logbuffer[tail]);
+ tail = (tail + 1) % LOG_BUFFER_ENTRIES;
+ }
+ if (!seq_has_overflowed(s))
+ port->logbuffer_tail = tail;
+ mutex_unlock(&port->logbuffer_lock);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
+
+static struct dentry *rootdir;
+
+static void tcpm_debugfs_init(struct tcpm_port *port)
+{
+ mutex_init(&port->logbuffer_lock);
+ /* /sys/kernel/debug/tcpm/usbcX */
+ if (!rootdir)
+ rootdir = debugfs_create_dir("tcpm", NULL);
+
+ port->dentry = debugfs_create_file(dev_name(port->dev),
+ S_IFREG | 0444, rootdir,
+ port, &tcpm_debug_fops);
+}
+
+static void tcpm_debugfs_exit(struct tcpm_port *port)
+{
+ int i;
+
+ mutex_lock(&port->logbuffer_lock);
+ for (i = 0; i < LOG_BUFFER_ENTRIES; i++) {
+ kfree(port->logbuffer[i]);
+ port->logbuffer[i] = NULL;
+ }
+ mutex_unlock(&port->logbuffer_lock);
+
+ debugfs_remove(port->dentry);
+ if (list_empty(&rootdir->d_subdirs)) {
+ debugfs_remove(rootdir);
+ rootdir = NULL;
+ }
+}
+
+#else
+
+__printf(2, 3)
+static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
+__printf(2, 3)
+static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
+static void tcpm_log_source_caps(struct tcpm_port *port) { }
+static void tcpm_debugfs_init(const struct tcpm_port *port) { }
+static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
+
+#endif
+
+static int tcpm_pd_transmit(struct tcpm_port *port,
+ enum tcpm_transmit_type type,
+ const struct pd_message *msg)
+{
+ unsigned long timeout;
+ int ret;
+
+ if (msg)
+ tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
+ else
+ tcpm_log(port, "PD TX, type: %#x", type);
+
+ reinit_completion(&port->tx_complete);
+ ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
+ if (ret < 0)
+ return ret;
+
+ mutex_unlock(&port->lock);
+ timeout = wait_for_completion_timeout(&port->tx_complete,
+ msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
+ mutex_lock(&port->lock);
+ if (!timeout)
+ return -ETIMEDOUT;
+
+ switch (port->tx_status) {
+ case TCPC_TX_SUCCESS:
+ port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
+ return 0;
+ case TCPC_TX_DISCARDED:
+ return -EAGAIN;
+ case TCPC_TX_FAILED:
+ default:
+ return -EIO;
+ }
+}
+
+void tcpm_pd_transmit_complete(struct tcpm_port *port,
+ enum tcpm_transmit_status status)
+{
+ tcpm_log(port, "PD TX complete, status: %u", status);
+ port->tx_status = status;
+ complete(&port->tx_complete);
+}
+EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
+
+static int tcpm_mux_set(struct tcpm_port *port, int state,
+ enum usb_role usb_role,
+ enum typec_orientation orientation)
+{
+ int ret;
+
+ tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
+ state, usb_role, orientation);
+
+ ret = typec_set_orientation(port->typec_port, orientation);
+ if (ret)
+ return ret;
+
+ if (port->role_sw) {
+ ret = usb_role_switch_set_role(port->role_sw, usb_role);
+ if (ret)
+ return ret;
+ }
+
+ return typec_set_mode(port->typec_port, state);
+}
+
+static int tcpm_set_polarity(struct tcpm_port *port,
+ enum typec_cc_polarity polarity)
+{
+ int ret;
+
+ tcpm_log(port, "polarity %d", polarity);
+
+ ret = port->tcpc->set_polarity(port->tcpc, polarity);
+ if (ret < 0)
+ return ret;
+
+ port->polarity = polarity;
+
+ return 0;
+}
+
+static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
+{
+ int ret;
+
+ tcpm_log(port, "vconn:=%d", enable);
+
+ ret = port->tcpc->set_vconn(port->tcpc, enable);
+ if (!ret) {
+ port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
+ typec_set_vconn_role(port->typec_port, port->vconn_role);
+ }
+
+ return ret;
+}
+
+static u32 tcpm_get_current_limit(struct tcpm_port *port)
+{
+ enum typec_cc_status cc;
+ u32 limit;
+
+ cc = port->polarity ? port->cc2 : port->cc1;
+ switch (cc) {
+ case TYPEC_CC_RP_1_5:
+ limit = 1500;
+ break;
+ case TYPEC_CC_RP_3_0:
+ limit = 3000;
+ break;
+ case TYPEC_CC_RP_DEF:
+ default:
+ if (port->tcpc->get_current_limit)
+ limit = port->tcpc->get_current_limit(port->tcpc);
+ else
+ limit = 0;
+ break;
+ }
+
+ return limit;
+}
+
+static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
+{
+ int ret = -EOPNOTSUPP;
+
+ tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
+
+ port->supply_voltage = mv;
+ port->current_limit = max_ma;
+
+ if (port->tcpc->set_current_limit)
+ ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
+
+ return ret;
+}
+
+/*
+ * Determine RP value to set based on maximum current supported
+ * by a port if configured as source.
+ * Returns CC value to report to link partner.
+ */
+static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
+{
+ const u32 *src_pdo = port->src_pdo;
+ int nr_pdo = port->nr_src_pdo;
+ int i;
+
+ /*
+ * Search for first entry with matching voltage.
+ * It should report the maximum supported current.
+ */
+ for (i = 0; i < nr_pdo; i++) {
+ const u32 pdo = src_pdo[i];
+
+ if (pdo_type(pdo) == PDO_TYPE_FIXED &&
+ pdo_fixed_voltage(pdo) == 5000) {
+ unsigned int curr = pdo_max_current(pdo);
+
+ if (curr >= 3000)
+ return TYPEC_CC_RP_3_0;
+ else if (curr >= 1500)
+ return TYPEC_CC_RP_1_5;
+ return TYPEC_CC_RP_DEF;
+ }
+ }
+
+ return TYPEC_CC_RP_DEF;
+}
+
+static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
+{
+ return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
+ port->data_role);
+}
+
+extern void amlogic_typec_set_mode(int mode);
+
+static int tcpm_set_roles(struct tcpm_port *port, bool attached,
+ enum typec_role role, enum typec_data_role data)
+{
+ enum typec_orientation orientation;
+ enum usb_role usb_role;
+ int ret;
+
+ if (port->polarity == TYPEC_POLARITY_CC1)
+ orientation = TYPEC_ORIENTATION_NORMAL;
+ else
+ orientation = TYPEC_ORIENTATION_REVERSE;
+
+ if (data == TYPEC_HOST)
+ usb_role = USB_ROLE_HOST;
+ else
+ usb_role = USB_ROLE_DEVICE;
+
+ ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
+ if (ret < 0)
+ return ret;
+
+ ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
+ if (ret < 0)
+ return ret;
+
+ port->pwr_role = role;
+ port->data_role = data;
+ pr_info("tcpm_set_roles(): pwr_role=%d, data_role=%d\n", (int)role, (int)data);
+ typec_set_data_role(port->typec_port, data);
+ typec_set_pwr_role(port->typec_port, role);
+ if (usb_role == USB_ROLE_HOST) {
+ printk("############# set host mode\n");
+ amlogic_typec_set_mode(0);
+ } else {
+ printk("############# set device mode\n");
+ amlogic_typec_set_mode(1);
+ }
+
+ return 0;
+}
+
+static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
+{
+ int ret;
+
+ ret = port->tcpc->set_roles(port->tcpc, true, role,
+ port->data_role);
+ if (ret < 0)
+ return ret;
+
+ port->pwr_role = role;
+ typec_set_pwr_role(port->typec_port, role);
+
+ return 0;
+}
+
+static int tcpm_pd_send_source_caps(struct tcpm_port *port)
+{
+ struct pd_message msg;
+ int i;
+
+ memset(&msg, 0, sizeof(msg));
+ if (!port->nr_src_pdo) {
+ /* No source capabilities defined, sink only */
+ msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+ } else {
+ msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id,
+ port->nr_src_pdo);
+ }
+ for (i = 0; i < port->nr_src_pdo; i++)
+ msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
+
+ return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+}
+
+static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
+{
+ struct pd_message msg;
+ int i;
+
+ memset(&msg, 0, sizeof(msg));
+ if (!port->nr_snk_pdo) {
+ /* No sink capabilities defined, source only */
+ msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+ } else {
+ msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id,
+ port->nr_snk_pdo);
+ }
+ for (i = 0; i < port->nr_snk_pdo; i++)
+ msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
+
+ return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+}
+
+static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
+ unsigned int delay_ms)
+{
+ if (delay_ms) {
+ tcpm_log(port, "pending state change %s -> %s @ %u ms",
+ tcpm_states[port->state], tcpm_states[state],
+ delay_ms);
+ port->delayed_state = state;
+ if (delay_ms != PD_T_PS_SOURCE_ON)
+ mod_delayed_work(port->wq, &port->state_machine,
+ msecs_to_jiffies(delay_ms));
+ port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
+ port->delay_ms = delay_ms;
+ } else {
+ tcpm_log(port, "state change %s -> %s",
+ tcpm_states[port->state], tcpm_states[state]);
+ port->delayed_state = INVALID_STATE;
+ port->prev_state = port->state;
+ port->state = state;
+ /*
+ * Don't re-queue the state machine work item if we're currently
+ * in the state machine and we're immediately changing states.
+ * tcpm_state_machine_work() will continue running the state
+ * machine.
+ */
+ if (!port->state_machine_running)
+ mod_delayed_work(port->wq, &port->state_machine, 0);
+ }
+}
+
+static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
+ unsigned int delay_ms)
+{
+ if (port->enter_state == port->state)
+ tcpm_set_state(port, state, delay_ms);
+ else
+ tcpm_log(port,
+ "skipped %sstate change %s -> %s [%u ms], context state %s",
+ delay_ms ? "delayed " : "",
+ tcpm_states[port->state], tcpm_states[state],
+ delay_ms, tcpm_states[port->enter_state]);
+}
+
+static void tcpm_queue_message(struct tcpm_port *port,
+ enum pd_msg_request message)
+{
+ port->queued_message = message;
+ mod_delayed_work(port->wq, &port->state_machine, 0);
+}
+
+/*
+ * VDM/VDO handling functions
+ */
+static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
+ const u32 *data, int cnt)
+{
+ port->vdo_count = cnt + 1;
+ port->vdo_data[0] = header;
+ memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
+ /* Set ready, vdm state machine will actually send */
+ port->vdm_retries = 0;
+ port->vdm_state = VDM_STATE_READY;
+}
+
+static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
+ int cnt)
+{
+ u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
+ u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
+
+ memset(&port->mode_data, 0, sizeof(port->mode_data));
+
+ port->partner_ident.id_header = vdo;
+ port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
+ port->partner_ident.product = product;
+
+ typec_partner_set_identity(port->partner);
+
+ tcpm_log(port, "Identity: %04x:%04x.%04x",
+ PD_IDH_VID(vdo),
+ PD_PRODUCT_PID(product), product & 0xffff);
+}
+
+static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
+ int cnt)
+{
+ struct pd_mode_data *pmdata = &port->mode_data;
+ int i;
+
+ for (i = 1; i < cnt; i++) {
+ u32 p = le32_to_cpu(payload[i]);
+ u16 svid;
+
+ svid = (p >> 16) & 0xffff;
+ if (!svid)
+ return false;
+
+ if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
+ goto abort;
+
+ pmdata->svids[pmdata->nsvids++] = svid;
+ tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
+
+ svid = p & 0xffff;
+ if (!svid)
+ return false;
+
+ if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
+ goto abort;
+
+ pmdata->svids[pmdata->nsvids++] = svid;
+ tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
+ }
+ return true;
+abort:
+ tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
+ return false;
+}
+
+static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
+ int cnt)
+{
+ struct pd_mode_data *pmdata = &port->mode_data;
+ struct typec_altmode_desc *paltmode;
+ int i;
+
+ if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
+ /* Already logged in svdm_consume_svids() */
+ return;
+ }
+
+ for (i = 1; i < cnt; i++) {
+ paltmode = &pmdata->altmode_desc[pmdata->altmodes];
+ memset(paltmode, 0, sizeof(*paltmode));
+
+ paltmode->svid = pmdata->svids[pmdata->svid_index];
+ paltmode->mode = i;
+ paltmode->vdo = le32_to_cpu(payload[i]);
+
+ tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
+ pmdata->altmodes, paltmode->svid,
+ paltmode->mode, paltmode->vdo);
+
+ pmdata->altmodes++;
+ }
+}
+
+static void tcpm_register_partner_altmodes(struct tcpm_port *port)
+{
+ struct pd_mode_data *modep = &port->mode_data;
+ struct typec_altmode *altmode;
+ int i;
+
+ for (i = 0; i < modep->altmodes; i++) {
+ altmode = typec_partner_register_altmode(port->partner,
+ &modep->altmode_desc[i]);
+ if (!altmode)
+ tcpm_log(port, "Failed to register partner SVID 0x%04x",
+ modep->altmode_desc[i].svid);
+ port->partner_altmode[i] = altmode;
+ }
+}
+
+#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
+
+static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
+ u32 *response)
+{
+ struct typec_altmode *adev;
+ struct typec_altmode *pdev;
+ struct pd_mode_data *modep;
+ u32 p[PD_MAX_PAYLOAD];
+ int rlen = 0;
+ int cmd_type;
+ int cmd;
+ int i;
+
+ for (i = 0; i < cnt; i++)
+ p[i] = le32_to_cpu(payload[i]);
+
+ cmd_type = PD_VDO_CMDT(p[0]);
+ cmd = PD_VDO_CMD(p[0]);
+
+ tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
+ p[0], cmd_type, cmd, cnt);
+
+ modep = &port->mode_data;
+
+ adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
+ PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
+
+ pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
+ PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
+
+ switch (cmd_type) {
+ case CMDT_INIT:
+ switch (cmd) {
+ case CMD_DISCOVER_IDENT:
+ /* 6.4.4.3.1: Only respond as UFP (device) */
+ if (port->data_role == TYPEC_DEVICE &&
+ port->nr_snk_vdo) {
+ for (i = 0; i < port->nr_snk_vdo; i++)
+ response[i + 1] = port->snk_vdo[i];
+ rlen = port->nr_snk_vdo + 1;
+ }
+ break;
+ case CMD_DISCOVER_SVID:
+ break;
+ case CMD_DISCOVER_MODES:
+ break;
+ case CMD_ENTER_MODE:
+ break;
+ case CMD_EXIT_MODE:
+ break;
+ case CMD_ATTENTION:
+ /* Attention command does not have response */
+ if (adev)
+ typec_altmode_attention(adev, p[1]);
+ return 0;
+ default:
+ break;
+ }
+ if (rlen >= 1) {
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
+ } else if (rlen == 0) {
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
+ rlen = 1;
+ } else {
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
+ rlen = 1;
+ }
+ break;
+ case CMDT_RSP_ACK:
+ /* silently drop message if we are not connected */
+ if (IS_ERR_OR_NULL(port->partner))
+ break;
+
+ switch (cmd) {
+ case CMD_DISCOVER_IDENT:
+ /* 6.4.4.3.1 */
+ svdm_consume_identity(port, payload, cnt);
+ response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
+ rlen = 1;
+ break;
+ case CMD_DISCOVER_SVID:
+ /* 6.4.4.3.2 */
+ if (svdm_consume_svids(port, payload, cnt)) {
+ response[0] = VDO(USB_SID_PD, 1,
+ CMD_DISCOVER_SVID);
+ rlen = 1;
+ } else if (modep->nsvids && supports_modal(port)) {
+ response[0] = VDO(modep->svids[0], 1,
+ CMD_DISCOVER_MODES);
+ rlen = 1;
+ }
+ break;
+ case CMD_DISCOVER_MODES:
+ /* 6.4.4.3.3 */
+ svdm_consume_modes(port, payload, cnt);
+ modep->svid_index++;
+ if (modep->svid_index < modep->nsvids) {
+ u16 svid = modep->svids[modep->svid_index];
+ response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
+ rlen = 1;
+ } else {
+ tcpm_register_partner_altmodes(port);
+ }
+ break;
+ case CMD_ENTER_MODE:
+ if (adev && pdev) {
+ typec_altmode_update_active(pdev, true);
+
+ if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
+ response[0] = VDO(adev->svid, 1,
+ CMD_EXIT_MODE);
+ response[0] |= VDO_OPOS(adev->mode);
+ return 1;
+ }
+ }
+ return 0;
+ case CMD_EXIT_MODE:
+ if (adev && pdev) {
+ typec_altmode_update_active(pdev, false);
+
+ /* Back to USB Operation */
+ WARN_ON(typec_altmode_notify(adev,
+ TYPEC_STATE_USB,
+ NULL));
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case CMDT_RSP_NAK:
+ switch (cmd) {
+ case CMD_ENTER_MODE:
+ /* Back to USB Operation */
+ if (adev)
+ WARN_ON(typec_altmode_notify(adev,
+ TYPEC_STATE_USB,
+ NULL));
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* Informing the alternate mode drivers about everything */
+ if (adev)
+ typec_altmode_vdm(adev, p[0], &p[1], cnt);
+
+ return rlen;
+}
+
+static void tcpm_handle_vdm_request(struct tcpm_port *port,
+ const __le32 *payload, int cnt)
+{
+ int rlen = 0;
+ u32 response[8] = { };
+ u32 p0 = le32_to_cpu(payload[0]);
+
+ if (port->vdm_state == VDM_STATE_BUSY) {
+ /* If UFP responded busy retry after timeout */
+ if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
+ port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
+ port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
+ CMDT_INIT;
+ mod_delayed_work(port->wq, &port->vdm_state_machine,
+ msecs_to_jiffies(PD_T_VDM_BUSY));
+ return;
+ }
+ port->vdm_state = VDM_STATE_DONE;
+ }
+
+ if (PD_VDO_SVDM(p0))
+ rlen = tcpm_pd_svdm(port, payload, cnt, response);
+
+ if (rlen > 0) {
+ tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+ }
+}
+
+static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
+ const u32 *data, int count)
+{
+ u32 header;
+
+ if (WARN_ON(count > VDO_MAX_SIZE - 1))
+ count = VDO_MAX_SIZE - 1;
+
+ /* set VDM header with VID & CMD */
+ header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
+ 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
+ tcpm_queue_vdm(port, header, data, count);
+
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+}
+
+static unsigned int vdm_ready_timeout(u32 vdm_hdr)
+{
+ unsigned int timeout;
+ int cmd = PD_VDO_CMD(vdm_hdr);
+
+ /* its not a structured VDM command */
+ if (!PD_VDO_SVDM(vdm_hdr))
+ return PD_T_VDM_UNSTRUCTURED;
+
+ switch (PD_VDO_CMDT(vdm_hdr)) {
+ case CMDT_INIT:
+ if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
+ timeout = PD_T_VDM_WAIT_MODE_E;
+ else
+ timeout = PD_T_VDM_SNDR_RSP;
+ break;
+ default:
+ if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
+ timeout = PD_T_VDM_E_MODE;
+ else
+ timeout = PD_T_VDM_RCVR_RSP;
+ break;
+ }
+ return timeout;
+}
+
+static void vdm_run_state_machine(struct tcpm_port *port)
+{
+ struct pd_message msg;
+ int i, res;
+
+ switch (port->vdm_state) {
+ case VDM_STATE_READY:
+ /* Only transmit VDM if attached */
+ if (!port->attached) {
+ port->vdm_state = VDM_STATE_ERR_BUSY;
+ break;
+ }
+
+ /*
+ * if there's traffic or we're not in PDO ready state don't send
+ * a VDM.
+ */
+ if (port->state != SRC_READY && port->state != SNK_READY)
+ break;
+
+ /* Prepare and send VDM */
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, port->vdo_count);
+ for (i = 0; i < port->vdo_count; i++)
+ msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
+ res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+ if (res < 0) {
+ port->vdm_state = VDM_STATE_ERR_SEND;
+ } else {
+ unsigned long timeout;
+
+ port->vdm_retries = 0;
+ port->vdm_state = VDM_STATE_BUSY;
+ timeout = vdm_ready_timeout(port->vdo_data[0]);
+ mod_delayed_work(port->wq, &port->vdm_state_machine,
+ timeout);
+ }
+ break;
+ case VDM_STATE_WAIT_RSP_BUSY:
+ port->vdo_data[0] = port->vdo_retry;
+ port->vdo_count = 1;
+ port->vdm_state = VDM_STATE_READY;
+ break;
+ case VDM_STATE_BUSY:
+ port->vdm_state = VDM_STATE_ERR_TMOUT;
+ break;
+ case VDM_STATE_ERR_SEND:
+ /*
+ * A partner which does not support USB PD will not reply,
+ * so this is not a fatal error. At the same time, some
+ * devices may not return GoodCRC under some circumstances,
+ * so we need to retry.
+ */
+ if (port->vdm_retries < 3) {
+ tcpm_log(port, "VDM Tx error, retry");
+ port->vdm_retries++;
+ port->vdm_state = VDM_STATE_READY;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static void vdm_state_machine_work(struct work_struct *work)
+{
+ struct tcpm_port *port = container_of(work, struct tcpm_port,
+ vdm_state_machine.work);
+ enum vdm_states prev_state;
+
+ mutex_lock(&port->lock);
+
+ /*
+ * Continue running as long as the port is not busy and there was
+ * a state change.
+ */
+ do {
+ prev_state = port->vdm_state;
+ vdm_run_state_machine(port);
+ } while (port->vdm_state != prev_state &&
+ port->vdm_state != VDM_STATE_BUSY);
+
+ mutex_unlock(&port->lock);
+}
+
+enum pdo_err {
+ PDO_NO_ERR,
+ PDO_ERR_NO_VSAFE5V,
+ PDO_ERR_VSAFE5V_NOT_FIRST,
+ PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
+ PDO_ERR_FIXED_NOT_SORTED,
+ PDO_ERR_VARIABLE_BATT_NOT_SORTED,
+ PDO_ERR_DUPE_PDO,
+ PDO_ERR_PPS_APDO_NOT_SORTED,
+ PDO_ERR_DUPE_PPS_APDO,
+};
+
+static const char * const pdo_err_msg[] = {
+ [PDO_ERR_NO_VSAFE5V] =
+ " err: source/sink caps should atleast have vSafe5V",
+ [PDO_ERR_VSAFE5V_NOT_FIRST] =
+ " err: vSafe5V Fixed Supply Object Shall always be the first object",
+ [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
+ " err: PDOs should be in the following order: Fixed; Battery; Variable",
+ [PDO_ERR_FIXED_NOT_SORTED] =
+ " err: Fixed supply pdos should be in increasing order of their fixed voltage",
+ [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
+ " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
+ [PDO_ERR_DUPE_PDO] =
+ " err: Variable/Batt supply pdos cannot have same min/max voltage",
+ [PDO_ERR_PPS_APDO_NOT_SORTED] =
+ " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
+ [PDO_ERR_DUPE_PPS_APDO] =
+ " err: Programmable power supply apdos cannot have same min/max voltage and max current",
+};
+
+static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo)
+{
+ unsigned int i;
+
+ /* Should at least contain vSafe5v */
+ if (nr_pdo < 1)
+ return PDO_ERR_NO_VSAFE5V;
+
+ /* The vSafe5V Fixed Supply Object Shall always be the first object */
+ if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
+ pdo_fixed_voltage(pdo[0]) != VSAFE5V)
+ return PDO_ERR_VSAFE5V_NOT_FIRST;
+
+ for (i = 1; i < nr_pdo; i++) {
+ if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
+ return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
+ } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
+ enum pd_pdo_type type = pdo_type(pdo[i]);
+
+ switch (type) {
+ /*
+ * The remaining Fixed Supply Objects, if
+ * present, shall be sent in voltage order;
+ * lowest to highest.
+ */
+ case PDO_TYPE_FIXED:
+ if (pdo_fixed_voltage(pdo[i]) <=
+ pdo_fixed_voltage(pdo[i - 1]))
+ return PDO_ERR_FIXED_NOT_SORTED;
+ break;
+ /*
+ * The Battery Supply Objects and Variable
+ * supply, if present shall be sent in Minimum
+ * Voltage order; lowest to highest.
+ */
+ case PDO_TYPE_VAR:
+ case PDO_TYPE_BATT:
+ if (pdo_min_voltage(pdo[i]) <
+ pdo_min_voltage(pdo[i - 1]))
+ return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
+ else if ((pdo_min_voltage(pdo[i]) ==
+ pdo_min_voltage(pdo[i - 1])) &&
+ (pdo_max_voltage(pdo[i]) ==
+ pdo_min_voltage(pdo[i - 1])))
+ return PDO_ERR_DUPE_PDO;
+ break;
+ /*
+ * The Programmable Power Supply APDOs, if present,
+ * shall be sent in Maximum Voltage order;
+ * lowest to highest.
+ */
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
+ break;
+
+ if (pdo_pps_apdo_max_voltage(pdo[i]) <
+ pdo_pps_apdo_max_voltage(pdo[i - 1]))
+ return PDO_ERR_PPS_APDO_NOT_SORTED;
+ else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
+ pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
+ pdo_pps_apdo_max_voltage(pdo[i]) ==
+ pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
+ pdo_pps_apdo_max_current(pdo[i]) ==
+ pdo_pps_apdo_max_current(pdo[i - 1]))
+ return PDO_ERR_DUPE_PPS_APDO;
+ break;
+ default:
+ tcpm_log_force(port, " Unknown pdo type");
+ }
+ }
+ }
+
+ return PDO_NO_ERR;
+}
+
+static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo)
+{
+ enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
+
+ if (err_index != PDO_NO_ERR) {
+ tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tcpm_altmode_enter(struct typec_altmode *altmode)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ u32 header;
+
+ mutex_lock(&port->lock);
+ header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm(port, header, NULL, 0);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+ mutex_unlock(&port->lock);
+
+ return 0;
+}
+
+static int tcpm_altmode_exit(struct typec_altmode *altmode)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ u32 header;
+
+ mutex_lock(&port->lock);
+ header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm(port, header, NULL, 0);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+ mutex_unlock(&port->lock);
+
+ return 0;
+}
+
+static int tcpm_altmode_vdm(struct typec_altmode *altmode,
+ u32 header, const u32 *data, int count)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+
+ mutex_lock(&port->lock);
+ tcpm_queue_vdm(port, header, data, count - 1);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+ mutex_unlock(&port->lock);
+
+ return 0;
+}
+
+static const struct typec_altmode_ops tcpm_altmode_ops = {
+ .enter = tcpm_altmode_enter,
+ .exit = tcpm_altmode_exit,
+ .vdm = tcpm_altmode_vdm,
+};
+
+/*
+ * PD (data, control) command handling functions
+ */
+static inline enum tcpm_state ready_state(struct tcpm_port *port)
+{
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_READY;
+ else
+ return SNK_READY;
+}
+
+static int tcpm_pd_send_control(struct tcpm_port *port,
+ enum pd_ctrl_msg_type type);
+
+static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
+ int cnt)
+{
+ u32 p0 = le32_to_cpu(payload[0]);
+ unsigned int type = usb_pd_ado_type(p0);
+
+ if (!type) {
+ tcpm_log(port, "Alert message received with no type");
+ return;
+ }
+
+ /* Just handling non-battery alerts for now */
+ if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_set_state(port, GET_STATUS_SEND, 0);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
+ break;
+ }
+ }
+}
+
+static void tcpm_pd_data_request(struct tcpm_port *port,
+ const struct pd_message *msg)
+{
+ enum pd_data_msg_type type = pd_header_type_le(msg->header);
+ unsigned int cnt = pd_header_cnt_le(msg->header);
+ unsigned int rev = pd_header_rev_le(msg->header);
+ unsigned int i;
+
+ switch (type) {
+ case PD_DATA_SOURCE_CAP:
+ if (port->pwr_role != TYPEC_SINK)
+ break;
+
+ for (i = 0; i < cnt; i++)
+ port->source_caps[i] = le32_to_cpu(msg->payload[i]);
+
+ port->nr_source_caps = cnt;
+
+ tcpm_log_source_caps(port);
+
+ tcpm_validate_caps(port, port->source_caps,
+ port->nr_source_caps);
+
+ /*
+ * Adjust revision in subsequent message headers, as required,
+ * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
+ * support Rev 1.0 so just do nothing in that scenario.
+ */
+ if (rev == PD_REV10)
+ break;
+
+ if (rev < PD_MAX_REV)
+ port->negotiated_rev = rev;
+
+ /*
+ * This message may be received even if VBUS is not
+ * present. This is quite unexpected; see USB PD
+ * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
+ * However, at the same time, we must be ready to
+ * receive this message and respond to it 15ms after
+ * receiving PS_RDY during power swap operations, no matter
+ * if VBUS is available or not (USB PD specification,
+ * section 6.5.9.2).
+ * So we need to accept the message either way,
+ * but be prepared to keep waiting for VBUS after it was
+ * handled.
+ */
+ tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
+ break;
+ case PD_DATA_REQUEST:
+ if (port->pwr_role != TYPEC_SOURCE ||
+ cnt != 1) {
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+
+ /*
+ * Adjust revision in subsequent message headers, as required,
+ * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
+ * support Rev 1.0 so just reject in that scenario.
+ */
+ if (rev == PD_REV10) {
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+
+ if (rev < PD_MAX_REV)
+ port->negotiated_rev = rev;
+
+ port->sink_request = le32_to_cpu(msg->payload[0]);
+ tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
+ break;
+ case PD_DATA_SINK_CAP:
+ /* We don't do anything with this at the moment... */
+ for (i = 0; i < cnt; i++)
+ port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
+ port->nr_sink_caps = cnt;
+ break;
+ case PD_DATA_VENDOR_DEF:
+ tcpm_handle_vdm_request(port, msg->payload, cnt);
+ break;
+ case PD_DATA_BIST:
+ /* Enable TCPC BIST support and ignore BDO_MODE_TESTDATA */
+ if (le32_to_cpu(msg->payload[0]) == BDO_MODE_TESTDATA) {
+ /* Hardware BIST will be turned off on port reset */
+ port->tcpc->set_bist(port->tcpc, true);
+ break;
+ }
+ if (port->state == SRC_READY || port->state == SNK_READY) {
+ port->bist_request = le32_to_cpu(msg->payload[0]);
+ tcpm_set_state(port, BIST_RX, 0);
+ }
+ break;
+ case PD_DATA_ALERT:
+ tcpm_handle_alert(port, msg->payload, cnt);
+ break;
+ case PD_DATA_BATT_STATUS:
+ case PD_DATA_GET_COUNTRY_INFO:
+ /* Currently unsupported */
+ tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
+ break;
+ default:
+ tcpm_log(port, "Unhandled data message type %#x", type);
+ break;
+ }
+}
+
+static void tcpm_pps_complete(struct tcpm_port *port, int result)
+{
+ if (port->pps_pending) {
+ port->pps_status = result;
+ port->pps_pending = false;
+ complete(&port->pps_complete);
+ }
+}
+
+static void tcpm_pd_ctrl_request(struct tcpm_port *port,
+ const struct pd_message *msg)
+{
+ enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
+ enum tcpm_state next_state;
+
+ switch (type) {
+ case PD_CTRL_GOOD_CRC:
+ case PD_CTRL_PING:
+ break;
+ case PD_CTRL_GET_SOURCE_CAP:
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ break;
+ case PD_CTRL_GET_SINK_CAP:
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ break;
+ case PD_CTRL_GOTO_MIN:
+ break;
+ case PD_CTRL_PS_RDY:
+ switch (port->state) {
+ case SNK_TRANSITION_SINK:
+ if (port->vbus_present) {
+ tcpm_set_current_limit(port,
+ port->current_limit,
+ port->supply_voltage);
+ port->explicit_contract = true;
+ tcpm_set_state(port, SNK_READY, 0);
+ } else {
+ /*
+ * Seen after power swap. Keep waiting for VBUS
+ * in a transitional state.
+ */
+ tcpm_set_state(port,
+ SNK_TRANSITION_SINK_VBUS, 0);
+ }
+ break;
+ case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
+ tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
+ break;
+ case PR_SWAP_SNK_SRC_SINK_OFF:
+ tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
+ break;
+ case VCONN_SWAP_WAIT_FOR_VCONN:
+ tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_REJECT:
+ case PD_CTRL_WAIT:
+ case PD_CTRL_NOT_SUPP:
+ switch (port->state) {
+ case SNK_NEGOTIATE_CAPABILITIES:
+ /* USB PD specification, Figure 8-43 */
+ if (port->explicit_contract)
+ next_state = SNK_READY;
+ else
+ next_state = SNK_WAIT_CAPABILITIES;
+ tcpm_set_state(port, next_state, 0);
+ break;
+ case SNK_NEGOTIATE_PPS_CAPABILITIES:
+ /* Revert data back from any requested PPS updates */
+ port->pps_data.out_volt = port->supply_voltage;
+ port->pps_data.op_curr = port->current_limit;
+ port->pps_status = (type == PD_CTRL_WAIT ?
+ -EAGAIN : -EOPNOTSUPP);
+ tcpm_set_state(port, SNK_READY, 0);
+ break;
+ case DR_SWAP_SEND:
+ port->swap_status = (type == PD_CTRL_WAIT ?
+ -EAGAIN : -EOPNOTSUPP);
+ tcpm_set_state(port, DR_SWAP_CANCEL, 0);
+ break;
+ case PR_SWAP_SEND:
+ port->swap_status = (type == PD_CTRL_WAIT ?
+ -EAGAIN : -EOPNOTSUPP);
+ tcpm_set_state(port, PR_SWAP_CANCEL, 0);
+ break;
+ case VCONN_SWAP_SEND:
+ port->swap_status = (type == PD_CTRL_WAIT ?
+ -EAGAIN : -EOPNOTSUPP);
+ tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_ACCEPT:
+ switch (port->state) {
+ case SNK_NEGOTIATE_CAPABILITIES:
+ port->pps_data.active = false;
+ tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
+ break;
+ case SNK_NEGOTIATE_PPS_CAPABILITIES:
+ port->pps_data.active = true;
+ port->supply_voltage = port->pps_data.out_volt;
+ port->current_limit = port->pps_data.op_curr;
+ tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
+ break;
+ case SOFT_RESET_SEND:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ if (port->pwr_role == TYPEC_SOURCE)
+ next_state = SRC_SEND_CAPABILITIES;
+ else
+ next_state = SNK_WAIT_CAPABILITIES;
+ tcpm_set_state(port, next_state, 0);
+ break;
+ case DR_SWAP_SEND:
+ tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
+ break;
+ case PR_SWAP_SEND:
+ tcpm_set_state(port, PR_SWAP_START, 0);
+ break;
+ case VCONN_SWAP_SEND:
+ tcpm_set_state(port, VCONN_SWAP_START, 0);
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_SOFT_RESET:
+ tcpm_set_state(port, SOFT_RESET, 0);
+ break;
+ case PD_CTRL_DR_SWAP:
+ if ((port->port_type != TYPEC_PORT_DRP) &&
+ (port->typec_caps.data != TYPEC_PORT_DRD)) {
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ /*
+ * XXX
+ * 6.3.9: If an alternate mode is active, a request to swap
+ * alternate modes shall trigger a port reset.
+ */
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
+ break;
+ }
+ break;
+ case PD_CTRL_PR_SWAP:
+ if (port->port_type != TYPEC_PORT_DRP) {
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
+ break;
+ }
+ break;
+ case PD_CTRL_VCONN_SWAP:
+ if (port->typec_caps.no_vconn) {
+ tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
+ break;
+ }
+
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
+ break;
+ default:
+ tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
+ break;
+ }
+ break;
+ case PD_CTRL_GET_SOURCE_CAP_EXT:
+ case PD_CTRL_GET_STATUS:
+ case PD_CTRL_FR_SWAP:
+ case PD_CTRL_GET_PPS_STATUS:
+ case PD_CTRL_GET_COUNTRY_CODES:
+ /* Currently not supported */
+ tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
+ break;
+ default:
+ tcpm_log(port, "Unhandled ctrl message type %#x", type);
+ break;
+ }
+}
+
+static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
+ const struct pd_message *msg)
+{
+ enum pd_ext_msg_type type = pd_header_type_le(msg->header);
+ unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
+
+ if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
+ tcpm_log(port, "Unchunked extended messages unsupported");
+ return;
+ }
+
+ if (data_size > PD_EXT_MAX_CHUNK_DATA) {
+ tcpm_log(port, "Chunk handling not yet supported");
+ return;
+ }
+
+ switch (type) {
+ case PD_EXT_STATUS:
+ /*
+ * If PPS related events raised then get PPS status to clear
+ * (see USB PD 3.0 Spec, 6.5.2.4)
+ */
+ if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
+ USB_PD_EXT_SDB_PPS_EVENTS)
+ tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
+ else
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case PD_EXT_PPS_STATUS:
+ /*
+ * For now the PPS status message is used to clear events
+ * and nothing more.
+ */
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case PD_EXT_SOURCE_CAP_EXT:
+ case PD_EXT_GET_BATT_CAP:
+ case PD_EXT_GET_BATT_STATUS:
+ case PD_EXT_BATT_CAP:
+ case PD_EXT_GET_MANUFACTURER_INFO:
+ case PD_EXT_MANUFACTURER_INFO:
+ case PD_EXT_SECURITY_REQUEST:
+ case PD_EXT_SECURITY_RESPONSE:
+ case PD_EXT_FW_UPDATE_REQUEST:
+ case PD_EXT_FW_UPDATE_RESPONSE:
+ case PD_EXT_COUNTRY_INFO:
+ case PD_EXT_COUNTRY_CODES:
+ tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
+ break;
+ default:
+ tcpm_log(port, "Unhandled extended message type %#x", type);
+ break;
+ }
+}
+
+static void tcpm_pd_rx_handler(struct work_struct *work)
+{
+ struct pd_rx_event *event = container_of(work,
+ struct pd_rx_event, work);
+ const struct pd_message *msg = &event->msg;
+ unsigned int cnt = pd_header_cnt_le(msg->header);
+ struct tcpm_port *port = event->port;
+
+ mutex_lock(&port->lock);
+
+ tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
+ port->attached);
+
+ if (port->attached) {
+ enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
+ unsigned int msgid = pd_header_msgid_le(msg->header);
+
+ /*
+ * USB PD standard, 6.6.1.2:
+ * "... if MessageID value in a received Message is the
+ * same as the stored value, the receiver shall return a
+ * GoodCRC Message with that MessageID value and drop
+ * the Message (this is a retry of an already received
+ * Message). Note: this shall not apply to the Soft_Reset
+ * Message which always has a MessageID value of zero."
+ */
+ if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
+ goto done;
+ port->rx_msgid = msgid;
+
+ /*
+ * If both ends believe to be DFP/host, we have a data role
+ * mismatch.
+ */
+ if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
+ (port->data_role == TYPEC_HOST)) {
+ tcpm_log(port,
+ "Data role mismatch, initiating error recovery");
+ tcpm_set_state(port, ERROR_RECOVERY, 0);
+ } else {
+ if (msg->header & PD_HEADER_EXT_HDR)
+ tcpm_pd_ext_msg_request(port, msg);
+ else if (cnt)
+ tcpm_pd_data_request(port, msg);
+ else
+ tcpm_pd_ctrl_request(port, msg);
+ }
+ }
+
+done:
+ mutex_unlock(&port->lock);
+ kfree(event);
+}
+
+void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
+{
+ struct pd_rx_event *event;
+
+ event = kzalloc(sizeof(*event), GFP_ATOMIC);
+ if (!event)
+ return;
+
+ INIT_WORK(&event->work, tcpm_pd_rx_handler);
+ event->port = port;
+ memcpy(&event->msg, msg, sizeof(*msg));
+ queue_work(port->wq, &event->work);
+}
+EXPORT_SYMBOL_GPL(tcpm_pd_receive);
+
+static int tcpm_pd_send_control(struct tcpm_port *port,
+ enum pd_ctrl_msg_type type)
+{
+ struct pd_message msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(type, port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+
+ return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+}
+
+/*
+ * Send queued message without affecting state.
+ * Return true if state machine should go back to sleep,
+ * false otherwise.
+ */
+static bool tcpm_send_queued_message(struct tcpm_port *port)
+{
+ enum pd_msg_request queued_message;
+
+ do {
+ queued_message = port->queued_message;
+ port->queued_message = PD_MSG_NONE;
+
+ switch (queued_message) {
+ case PD_MSG_CTRL_WAIT:
+ tcpm_pd_send_control(port, PD_CTRL_WAIT);
+ break;
+ case PD_MSG_CTRL_REJECT:
+ tcpm_pd_send_control(port, PD_CTRL_REJECT);
+ break;
+ case PD_MSG_CTRL_NOT_SUPP:
+ tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
+ break;
+ case PD_MSG_DATA_SINK_CAP:
+ tcpm_pd_send_sink_caps(port);
+ break;
+ case PD_MSG_DATA_SOURCE_CAP:
+ tcpm_pd_send_source_caps(port);
+ break;
+ default:
+ break;
+ }
+ } while (port->queued_message != PD_MSG_NONE);
+
+ if (port->delayed_state != INVALID_STATE) {
+ if (time_is_after_jiffies(port->delayed_runtime)) {
+ mod_delayed_work(port->wq, &port->state_machine,
+ port->delayed_runtime - jiffies);
+ return true;
+ }
+ port->delayed_state = INVALID_STATE;
+ }
+ return false;
+}
+
+static int tcpm_pd_check_request(struct tcpm_port *port)
+{
+ u32 pdo, rdo = port->sink_request;
+ unsigned int max, op, pdo_max, index;
+ enum pd_pdo_type type;
+
+ index = rdo_index(rdo);
+ if (!index || index > port->nr_src_pdo)
+ return -EINVAL;
+
+ pdo = port->src_pdo[index - 1];
+ type = pdo_type(pdo);
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ case PDO_TYPE_VAR:
+ max = rdo_max_current(rdo);
+ op = rdo_op_current(rdo);
+ pdo_max = pdo_max_current(pdo);
+
+ if (op > pdo_max)
+ return -EINVAL;
+ if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
+ return -EINVAL;
+
+ if (type == PDO_TYPE_FIXED)
+ tcpm_log(port,
+ "Requested %u mV, %u mA for %u / %u mA",
+ pdo_fixed_voltage(pdo), pdo_max, op, max);
+ else
+ tcpm_log(port,
+ "Requested %u -> %u mV, %u mA for %u / %u mA",
+ pdo_min_voltage(pdo), pdo_max_voltage(pdo),
+ pdo_max, op, max);
+ break;
+ case PDO_TYPE_BATT:
+ max = rdo_max_power(rdo);
+ op = rdo_op_power(rdo);
+ pdo_max = pdo_max_power(pdo);
+
+ if (op > pdo_max)
+ return -EINVAL;
+ if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
+ return -EINVAL;
+ tcpm_log(port,
+ "Requested %u -> %u mV, %u mW for %u / %u mW",
+ pdo_min_voltage(pdo), pdo_max_voltage(pdo),
+ pdo_max, op, max);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ port->op_vsafe5v = index == 1;
+
+ return 0;
+}
+
+#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
+#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
+
+static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
+ int *src_pdo)
+{
+ unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
+ max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
+ min_snk_mv = 0;
+ int ret = -EINVAL;
+
+ port->pps_data.supported = false;
+ port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
+
+ /*
+ * Select the source PDO providing the most power which has a
+ * matchig sink cap.
+ */
+ for (i = 0; i < port->nr_source_caps; i++) {
+ u32 pdo = port->source_caps[i];
+ enum pd_pdo_type type = pdo_type(pdo);
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ max_src_mv = pdo_fixed_voltage(pdo);
+ min_src_mv = max_src_mv;
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ max_src_mv = pdo_max_voltage(pdo);
+ min_src_mv = pdo_min_voltage(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
+ port->pps_data.supported = true;
+ port->usb_type =
+ POWER_SUPPLY_USB_TYPE_PD_PPS;
+ }
+ continue;
+ default:
+ tcpm_log(port, "Invalid source PDO type, ignoring");
+ continue;
+ }
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ case PDO_TYPE_VAR:
+ src_ma = pdo_max_current(pdo);
+ src_mw = src_ma * min_src_mv / 1000;
+ break;
+ case PDO_TYPE_BATT:
+ src_mw = pdo_max_power(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ continue;
+ default:
+ tcpm_log(port, "Invalid source PDO type, ignoring");
+ continue;
+ }
+
+ for (j = 0; j < port->nr_snk_pdo; j++) {
+ pdo = port->snk_pdo[j];
+
+ switch (pdo_type(pdo)) {
+ case PDO_TYPE_FIXED:
+ max_snk_mv = pdo_fixed_voltage(pdo);
+ min_snk_mv = max_snk_mv;
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ max_snk_mv = pdo_max_voltage(pdo);
+ min_snk_mv = pdo_min_voltage(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ continue;
+ default:
+ tcpm_log(port, "Invalid sink PDO type, ignoring");
+ continue;
+ }
+
+ if (max_src_mv <= max_snk_mv &&
+ min_src_mv >= min_snk_mv) {
+ /* Prefer higher voltages if available */
+ if ((src_mw == max_mw && min_src_mv > max_mv) ||
+ src_mw > max_mw) {
+ *src_pdo = i;
+ *sink_pdo = j;
+ max_mw = src_mw;
+ max_mv = min_src_mv;
+ ret = 0;
+ }
+ }
+ }
+ }
+
+ return ret;
+}
+
+#define min_pps_apdo_current(x, y) \
+ min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
+
+static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
+{
+ unsigned int i, j, max_mw = 0, max_mv = 0;
+ unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
+ unsigned int min_snk_mv, max_snk_mv, snk_ma;
+ u32 pdo;
+ unsigned int src_pdo = 0, snk_pdo = 0;
+
+ /*
+ * Select the source PPS APDO providing the most power while staying
+ * within the board's limits. We skip the first PDO as this is always
+ * 5V 3A.
+ */
+ for (i = 1; i < port->nr_source_caps; ++i) {
+ pdo = port->source_caps[i];
+
+ switch (pdo_type(pdo)) {
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
+ tcpm_log(port, "Not PPS APDO (source), ignoring");
+ continue;
+ }
+
+ min_src_mv = pdo_pps_apdo_min_voltage(pdo);
+ max_src_mv = pdo_pps_apdo_max_voltage(pdo);
+ src_ma = pdo_pps_apdo_max_current(pdo);
+ src_mw = (src_ma * max_src_mv) / 1000;
+
+ /*
+ * Now search through the sink PDOs to find a matching
+ * PPS APDO. Again skip the first sink PDO as this will
+ * always be 5V 3A.
+ */
+ for (j = 1; j < port->nr_snk_pdo; j++) {
+ pdo = port->snk_pdo[j];
+
+ switch (pdo_type(pdo)) {
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
+ tcpm_log(port,
+ "Not PPS APDO (sink), ignoring");
+ continue;
+ }
+
+ min_snk_mv =
+ pdo_pps_apdo_min_voltage(pdo);
+ max_snk_mv =
+ pdo_pps_apdo_max_voltage(pdo);
+ snk_ma =
+ pdo_pps_apdo_max_current(pdo);
+ break;
+ default:
+ tcpm_log(port,
+ "Not APDO type (sink), ignoring");
+ continue;
+ }
+
+ if (max_src_mv <= max_snk_mv &&
+ min_src_mv >= min_snk_mv) {
+ /* Prefer higher voltages if available */
+ if ((src_mw == max_mw &&
+ min_src_mv > max_mv) ||
+ src_mw > max_mw) {
+ src_pdo = i;
+ snk_pdo = j;
+ max_mw = src_mw;
+ max_mv = max_src_mv;
+ }
+ }
+ }
+
+ break;
+ default:
+ tcpm_log(port, "Not APDO type (source), ignoring");
+ continue;
+ }
+ }
+
+ if (src_pdo) {
+ pdo = port->source_caps[src_pdo];
+
+ port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo);
+ port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo);
+ port->pps_data.max_curr =
+ min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]);
+ port->pps_data.out_volt =
+ min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt);
+ port->pps_data.op_curr =
+ min(port->pps_data.max_curr, port->pps_data.op_curr);
+ }
+
+ return src_pdo;
+}
+
+static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
+{
+ unsigned int mv, ma, mw, flags;
+ unsigned int max_ma, max_mw;
+ enum pd_pdo_type type;
+ u32 pdo, matching_snk_pdo;
+ int src_pdo_index = 0;
+ int snk_pdo_index = 0;
+ int ret;
+
+ ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
+ if (ret < 0)
+ return ret;
+
+ pdo = port->source_caps[src_pdo_index];
+ matching_snk_pdo = port->snk_pdo[snk_pdo_index];
+ type = pdo_type(pdo);
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ mv = pdo_fixed_voltage(pdo);
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ mv = pdo_min_voltage(pdo);
+ break;
+ default:
+ tcpm_log(port, "Invalid PDO selected!");
+ return -EINVAL;
+ }
+
+ /* Select maximum available current within the sink pdo's limit */
+ if (type == PDO_TYPE_BATT) {
+ mw = min_power(pdo, matching_snk_pdo);
+ ma = 1000 * mw / mv;
+ } else {
+ ma = min_current(pdo, matching_snk_pdo);
+ mw = ma * mv / 1000;
+ }
+
+ flags = RDO_USB_COMM | RDO_NO_SUSPEND;
+
+ /* Set mismatch bit if offered power is less than operating power */
+ max_ma = ma;
+ max_mw = mw;
+ if (mw < port->operating_snk_mw) {
+ flags |= RDO_CAP_MISMATCH;
+ if (type == PDO_TYPE_BATT &&
+ (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
+ max_mw = pdo_max_power(matching_snk_pdo);
+ else if (pdo_max_current(matching_snk_pdo) >
+ pdo_max_current(pdo))
+ max_ma = pdo_max_current(matching_snk_pdo);
+ }
+
+ tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
+ port->cc_req, port->cc1, port->cc2, port->vbus_source,
+ port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
+ port->polarity);
+
+ if (type == PDO_TYPE_BATT) {
+ *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
+
+ tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
+ src_pdo_index, mv, mw,
+ flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
+ } else {
+ *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
+
+ tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
+ src_pdo_index, mv, ma,
+ flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
+ }
+
+ port->current_limit = ma;
+ port->supply_voltage = mv;
+
+ return 0;
+}
+
+static int tcpm_pd_send_request(struct tcpm_port *port)
+{
+ struct pd_message msg;
+ int ret;
+ u32 rdo;
+
+ ret = tcpm_pd_build_request(port, &rdo);
+ if (ret < 0)
+ return ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 1);
+ msg.payload[0] = cpu_to_le32(rdo);
+
+ return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+}
+
+static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
+{
+ unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags;
+ enum pd_pdo_type type;
+ unsigned int src_pdo_index;
+ u32 pdo;
+
+ src_pdo_index = tcpm_pd_select_pps_apdo(port);
+ if (!src_pdo_index)
+ return -EOPNOTSUPP;
+
+ pdo = port->source_caps[src_pdo_index];
+ type = pdo_type(pdo);
+
+ switch (type) {
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
+ tcpm_log(port, "Invalid APDO selected!");
+ return -EINVAL;
+ }
+ min_mv = port->pps_data.min_volt;
+ max_mv = port->pps_data.max_volt;
+ max_ma = port->pps_data.max_curr;
+ out_mv = port->pps_data.out_volt;
+ op_ma = port->pps_data.op_curr;
+ break;
+ default:
+ tcpm_log(port, "Invalid PDO selected!");
+ return -EINVAL;
+ }
+
+ flags = RDO_USB_COMM | RDO_NO_SUSPEND;
+
+ op_mw = (op_ma * out_mv) / 1000;
+ if (op_mw < port->operating_snk_mw) {
+ /*
+ * Try raising current to meet power needs. If that's not enough
+ * then try upping the voltage. If that's still not enough
+ * then we've obviously chosen a PPS APDO which really isn't
+ * suitable so abandon ship.
+ */
+ op_ma = (port->operating_snk_mw * 1000) / out_mv;
+ if ((port->operating_snk_mw * 1000) % out_mv)
+ ++op_ma;
+ op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
+
+ if (op_ma > max_ma) {
+ op_ma = max_ma;
+ out_mv = (port->operating_snk_mw * 1000) / op_ma;
+ if ((port->operating_snk_mw * 1000) % op_ma)
+ ++out_mv;
+ out_mv += RDO_PROG_VOLT_MV_STEP -
+ (out_mv % RDO_PROG_VOLT_MV_STEP);
+
+ if (out_mv > max_mv) {
+ tcpm_log(port, "Invalid PPS APDO selected!");
+ return -EINVAL;
+ }
+ }
+ }
+
+ tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
+ port->cc_req, port->cc1, port->cc2, port->vbus_source,
+ port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
+ port->polarity);
+
+ *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
+
+ tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
+ src_pdo_index, out_mv, op_ma);
+
+ port->pps_data.op_curr = op_ma;
+ port->pps_data.out_volt = out_mv;
+
+ return 0;
+}
+
+static int tcpm_pd_send_pps_request(struct tcpm_port *port)
+{
+ struct pd_message msg;
+ int ret;
+ u32 rdo;
+
+ ret = tcpm_pd_build_pps_request(port, &rdo);
+ if (ret < 0)
+ return ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 1);
+ msg.payload[0] = cpu_to_le32(rdo);
+
+ return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
+}
+
+static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
+{
+ int ret;
+
+ if (enable && port->vbus_charge)
+ return -EINVAL;
+
+ tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
+
+ ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
+ if (ret < 0)
+ return ret;
+
+ port->vbus_source = enable;
+ return 0;
+}
+
+static int tcpm_set_charge(struct tcpm_port *port, bool charge)
+{
+ int ret;
+
+ if (charge && port->vbus_source)
+ return -EINVAL;
+
+ if (charge != port->vbus_charge) {
+ tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
+ ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
+ charge);
+ if (ret < 0)
+ return ret;
+ }
+ port->vbus_charge = charge;
+ return 0;
+}
+
+static bool tcpm_start_drp_toggling(struct tcpm_port *port,
+ enum typec_cc_status cc)
+{
+ int ret;
+
+ if (port->tcpc->start_drp_toggling &&
+ port->port_type == TYPEC_PORT_DRP) {
+ tcpm_log_force(port, "Start DRP toggling");
+ ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
+ if (!ret)
+ return true;
+ }
+
+ return false;
+}
+
+static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
+{
+ tcpm_log(port, "cc:=%d", cc);
+ port->cc_req = cc;
+ port->tcpc->set_cc(port->tcpc, cc);
+}
+
+static int tcpm_init_vbus(struct tcpm_port *port)
+{
+ int ret;
+
+ ret = port->tcpc->set_vbus(port->tcpc, false, false);
+ port->vbus_source = false;
+ port->vbus_charge = false;
+ return ret;
+}
+
+static int tcpm_init_vconn(struct tcpm_port *port)
+{
+ int ret;
+
+ ret = port->tcpc->set_vconn(port->tcpc, false);
+ port->vconn_role = TYPEC_SINK;
+ return ret;
+}
+
+static void tcpm_typec_connect(struct tcpm_port *port)
+{
+ if (!port->connected) {
+ /* Make sure we don't report stale identity information */
+ memset(&port->partner_ident, 0, sizeof(port->partner_ident));
+ port->partner_desc.usb_pd = port->pd_capable;
+ if (tcpm_port_is_debug(port))
+ port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
+ else if (tcpm_port_is_audio(port))
+ port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
+ else
+ port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
+ port->partner = typec_register_partner(port->typec_port,
+ &port->partner_desc);
+ port->connected = true;
+ }
+}
+
+static int tcpm_src_attach(struct tcpm_port *port)
+{
+ enum typec_cc_polarity polarity =
+ port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
+ : TYPEC_POLARITY_CC1;
+ int ret;
+
+ if (port->attached)
+ return 0;
+
+ ret = tcpm_set_polarity(port, polarity);
+ if (ret < 0)
+ return ret;
+
+ ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
+ if (ret < 0)
+ return ret;
+
+ ret = port->tcpc->set_pd_rx(port->tcpc, true);
+ if (ret < 0)
+ goto out_disable_mux;
+
+ /*
+ * USB Type-C specification, version 1.2,
+ * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
+ * Enable VCONN only if the non-RD port is set to RA.
+ */
+ if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
+ (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
+ ret = tcpm_set_vconn(port, true);
+ if (ret < 0)
+ goto out_disable_pd;
+ }
+
+ ret = tcpm_set_vbus(port, true);
+ if (ret < 0)
+ goto out_disable_vconn;
+
+ port->pd_capable = false;
+
+ port->partner = NULL;
+
+ port->attached = true;
+ port->send_discover = true;
+
+ return 0;
+
+out_disable_vconn:
+ tcpm_set_vconn(port, false);
+out_disable_pd:
+ port->tcpc->set_pd_rx(port->tcpc, false);
+out_disable_mux:
+ tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
+ TYPEC_ORIENTATION_NONE);
+ return ret;
+}
+
+static void tcpm_typec_disconnect(struct tcpm_port *port)
+{
+ if (port->connected) {
+ typec_unregister_partner(port->partner);
+ port->partner = NULL;
+ port->connected = false;
+ }
+}
+
+static void tcpm_unregister_altmodes(struct tcpm_port *port)
+{
+ struct pd_mode_data *modep = &port->mode_data;
+ int i;
+
+ for (i = 0; i < modep->altmodes; i++) {
+ typec_unregister_altmode(port->partner_altmode[i]);
+ port->partner_altmode[i] = NULL;
+ }
+
+ memset(modep, 0, sizeof(*modep));
+}
+
+static void tcpm_reset_port(struct tcpm_port *port)
+{
+ tcpm_unregister_altmodes(port);
+ tcpm_typec_disconnect(port);
+ port->attached = false;
+ port->pd_capable = false;
+ port->pps_data.supported = false;
+
+ /*
+ * First Rx ID should be 0; set this to a sentinel of -1 so that
+ * we can check tcpm_pd_rx_handler() if we had seen it before.
+ */
+ port->rx_msgid = -1;
+
+ port->tcpc->set_pd_rx(port->tcpc, false);
+ tcpm_init_vbus(port); /* also disables charging */
+ tcpm_init_vconn(port);
+ tcpm_set_current_limit(port, 0, 0);
+ tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
+ tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
+ TYPEC_ORIENTATION_NONE);
+ tcpm_set_attached_state(port, false);
+ port->try_src_count = 0;
+ port->try_snk_count = 0;
+ port->usb_type = POWER_SUPPLY_USB_TYPE_C;
+
+ power_supply_changed(port->psy);
+}
+
+static void tcpm_detach(struct tcpm_port *port)
+{
+ if (!port->attached)
+ return;
+
+ if (tcpm_port_is_disconnected(port))
+ port->hard_reset_count = 0;
+
+ tcpm_reset_port(port);
+}
+
+static void tcpm_src_detach(struct tcpm_port *port)
+{
+ tcpm_detach(port);
+}
+
+static int tcpm_snk_attach(struct tcpm_port *port)
+{
+ int ret;
+
+ if (port->attached)
+ return 0;
+
+ ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
+ TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
+ if (ret < 0)
+ return ret;
+
+ ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
+ if (ret < 0)
+ return ret;
+
+ port->pd_capable = false;
+
+ port->partner = NULL;
+
+ port->attached = true;
+ port->send_discover = true;
+
+ return 0;
+}
+
+static void tcpm_snk_detach(struct tcpm_port *port)
+{
+ tcpm_detach(port);
+}
+
+static int tcpm_acc_attach(struct tcpm_port *port)
+{
+ int ret;
+
+ if (port->attached)
+ return 0;
+
+ ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
+ if (ret < 0)
+ return ret;
+
+ port->partner = NULL;
+
+ tcpm_typec_connect(port);
+
+ port->attached = true;
+
+ return 0;
+}
+
+static void tcpm_acc_detach(struct tcpm_port *port)
+{
+ tcpm_detach(port);
+}
+
+static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
+{
+ if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
+ return HARD_RESET_SEND;
+ if (port->pd_capable)
+ return ERROR_RECOVERY;
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ if (port->state == SNK_WAIT_CAPABILITIES)
+ return SNK_READY;
+ return SNK_UNATTACHED;
+}
+
+static inline enum tcpm_state unattached_state(struct tcpm_port *port)
+{
+ if (port->port_type == TYPEC_PORT_DRP) {
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ else
+ return SNK_UNATTACHED;
+ } else if (port->port_type == TYPEC_PORT_SRC) {
+ return SRC_UNATTACHED;
+ }
+
+ return SNK_UNATTACHED;
+}
+
+static void tcpm_check_send_discover(struct tcpm_port *port)
+{
+ if (port->data_role == TYPEC_HOST && port->send_discover &&
+ port->pd_capable) {
+ tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
+ port->send_discover = false;
+ }
+}
+
+static void tcpm_swap_complete(struct tcpm_port *port, int result)
+{
+ if (port->swap_pending) {
+ port->swap_status = result;
+ port->swap_pending = false;
+ port->non_pd_role_swap = false;
+ complete(&port->swap_complete);
+ }
+}
+
+static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
+{
+ switch (cc) {
+ case TYPEC_CC_RP_1_5:
+ return TYPEC_PWR_MODE_1_5A;
+ case TYPEC_CC_RP_3_0:
+ return TYPEC_PWR_MODE_3_0A;
+ case TYPEC_CC_RP_DEF:
+ default:
+ return TYPEC_PWR_MODE_USB;
+ }
+}
+
+static void run_state_machine(struct tcpm_port *port)
+{
+ int ret;
+ enum typec_pwr_opmode opmode;
+ unsigned int msecs;
+
+ port->enter_state = port->state;
+ switch (port->state) {
+ case DRP_TOGGLING:
+ break;
+ /* SRC states */
+ case SRC_UNATTACHED:
+ if (!port->non_pd_role_swap)
+ tcpm_swap_complete(port, -ENOTCONN);
+ tcpm_src_detach(port);
+ if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
+ tcpm_set_state(port, DRP_TOGGLING, 0);
+ break;
+ }
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ if (port->port_type == TYPEC_PORT_DRP)
+ tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
+ break;
+ case SRC_ATTACH_WAIT:
+ if (tcpm_port_is_debug(port))
+ tcpm_set_state(port, DEBUG_ACC_ATTACHED,
+ PD_T_CC_DEBOUNCE);
+ else if (tcpm_port_is_audio(port))
+ tcpm_set_state(port, AUDIO_ACC_ATTACHED,
+ PD_T_CC_DEBOUNCE);
+ else if (tcpm_port_is_source(port))
+ tcpm_set_state(port,
+ tcpm_try_snk(port) ? SNK_TRY
+ : SRC_ATTACHED,
+ PD_T_CC_DEBOUNCE);
+ break;
+
+ case SNK_TRY:
+ port->try_snk_count++;
+ /*
+ * Requirements:
+ * - Do not drive vconn or vbus
+ * - Terminate CC pins (both) to Rd
+ * Action:
+ * - Wait for tDRPTry (PD_T_DRP_TRY).
+ * Until then, ignore any state changes.
+ */
+ tcpm_set_cc(port, TYPEC_CC_RD);
+ tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
+ break;
+ case SNK_TRY_WAIT:
+ if (tcpm_port_is_sink(port)) {
+ tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
+ } else {
+ tcpm_set_state(port, SRC_TRYWAIT, 0);
+ port->max_wait = 0;
+ }
+ break;
+ case SNK_TRY_WAIT_DEBOUNCE:
+ tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
+ PD_T_PD_DEBOUNCE);
+ break;
+ case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
+ if (port->vbus_present && tcpm_port_is_sink(port)) {
+ tcpm_set_state(port, SNK_ATTACHED, 0);
+ } else {
+ tcpm_set_state(port, SRC_TRYWAIT, 0);
+ port->max_wait = 0;
+ }
+ break;
+ case SRC_TRYWAIT:
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ if (port->max_wait == 0) {
+ port->max_wait = jiffies +
+ msecs_to_jiffies(PD_T_DRP_TRY);
+ tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
+ PD_T_DRP_TRY);
+ } else {
+ if (time_is_after_jiffies(port->max_wait))
+ tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
+ jiffies_to_msecs(port->max_wait -
+ jiffies));
+ else
+ tcpm_set_state(port, SNK_UNATTACHED, 0);
+ }
+ break;
+ case SRC_TRYWAIT_DEBOUNCE:
+ tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
+ break;
+ case SRC_TRYWAIT_UNATTACHED:
+ tcpm_set_state(port, SNK_UNATTACHED, 0);
+ break;
+
+ case SRC_ATTACHED:
+ ret = tcpm_src_attach(port);
+ tcpm_set_state(port, SRC_UNATTACHED,
+ ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
+ break;
+ case SRC_STARTUP:
+ opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
+ typec_set_pwr_opmode(port->typec_port, opmode);
+ port->pwr_opmode = TYPEC_PWR_MODE_USB;
+ port->caps_count = 0;
+ port->negotiated_rev = PD_MAX_REV;
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ port->explicit_contract = false;
+ tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
+ break;
+ case SRC_SEND_CAPABILITIES:
+ port->caps_count++;
+ if (port->caps_count > PD_N_CAPS_COUNT) {
+ tcpm_set_state(port, SRC_READY, 0);
+ break;
+ }
+ ret = tcpm_pd_send_source_caps(port);
+ if (ret < 0) {
+ tcpm_set_state(port, SRC_SEND_CAPABILITIES,
+ PD_T_SEND_SOURCE_CAP);
+ } else {
+ /*
+ * Per standard, we should clear the reset counter here.
+ * However, that can result in state machine hang-ups.
+ * Reset it only in READY state to improve stability.
+ */
+ /* port->hard_reset_count = 0; */
+ port->caps_count = 0;
+ port->pd_capable = true;
+ tcpm_set_state_cond(port, hard_reset_state(port),
+ PD_T_SEND_SOURCE_CAP);
+ }
+ break;
+ case SRC_NEGOTIATE_CAPABILITIES:
+ ret = tcpm_pd_check_request(port);
+ if (ret < 0) {
+ tcpm_pd_send_control(port, PD_CTRL_REJECT);
+ if (!port->explicit_contract) {
+ tcpm_set_state(port,
+ SRC_WAIT_NEW_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state(port, SRC_READY, 0);
+ }
+ } else {
+ tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
+ PD_T_SRC_TRANSITION);
+ }
+ break;
+ case SRC_TRANSITION_SUPPLY:
+ /* XXX: regulator_set_voltage(vbus, ...) */
+ tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
+ port->explicit_contract = true;
+ typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
+ port->pwr_opmode = TYPEC_PWR_MODE_PD;
+ tcpm_set_state_cond(port, SRC_READY, 0);
+ break;
+ case SRC_READY:
+#if 1
+ port->hard_reset_count = 0;
+#endif
+ port->try_src_count = 0;
+
+ tcpm_swap_complete(port, 0);
+ tcpm_typec_connect(port);
+
+ tcpm_check_send_discover(port);
+ /*
+ * 6.3.5
+ * Sending ping messages is not necessary if
+ * - the source operates at vSafe5V
+ * or
+ * - The system is not operating in PD mode
+ * or
+ * - Both partners are connected using a Type-C connector
+ *
+ * There is no actual need to send PD messages since the local
+ * port type-c and the spec does not clearly say whether PD is
+ * possible when type-c is connected to Type-A/B
+ */
+ break;
+ case SRC_WAIT_NEW_CAPABILITIES:
+ /* Nothing to do... */
+ break;
+
+ /* SNK states */
+ case SNK_UNATTACHED:
+ if (!port->non_pd_role_swap)
+ tcpm_swap_complete(port, -ENOTCONN);
+ tcpm_pps_complete(port, -ENOTCONN);
+ tcpm_snk_detach(port);
+ if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
+ tcpm_set_state(port, DRP_TOGGLING, 0);
+ break;
+ }
+ tcpm_set_cc(port, TYPEC_CC_RD);
+ if (port->port_type == TYPEC_PORT_DRP)
+ tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
+ else if (port->port_type == TYPEC_PORT_SNK)
+ tcpm_set_state(port, SNK_ATTACH_WAIT, PD_T_DRP_SNK); // TODO: sync this with Rong.
+ break;
+ case SNK_ATTACH_WAIT:
+ if ((port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 != TYPEC_CC_OPEN) ||
+ (port->cc1 != TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN))
+ tcpm_set_state(port, SNK_DEBOUNCED,
+ PD_T_CC_DEBOUNCE);
+ else if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(port, SNK_UNATTACHED,
+ PD_T_PD_DEBOUNCE);
+ break;
+ case SNK_DEBOUNCED:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(port, SNK_UNATTACHED,
+ PD_T_PD_DEBOUNCE);
+ else if (port->vbus_present)
+ tcpm_set_state(port,
+ tcpm_try_src(port) ? SRC_TRY
+ : SNK_ATTACHED,
+ 0);
+ else
+ /* Wait for VBUS, but not forever */
+ tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
+ break;
+
+ case SRC_TRY:
+ port->try_src_count++;
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ port->max_wait = 0;
+ tcpm_set_state(port, SRC_TRY_WAIT, 0);
+ break;
+ case SRC_TRY_WAIT:
+ if (port->max_wait == 0) {
+ port->max_wait = jiffies +
+ msecs_to_jiffies(PD_T_DRP_TRY);
+ msecs = PD_T_DRP_TRY;
+ } else {
+ if (time_is_after_jiffies(port->max_wait))
+ msecs = jiffies_to_msecs(port->max_wait -
+ jiffies);
+ else
+ msecs = 0;
+ }
+ tcpm_set_state(port, SNK_TRYWAIT, msecs);
+ break;
+ case SRC_TRY_DEBOUNCE:
+ tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
+ break;
+ case SNK_TRYWAIT:
+ tcpm_set_cc(port, TYPEC_CC_RD);
+ tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
+ break;
+ case SNK_TRYWAIT_VBUS:
+ /*
+ * TCPM stays in this state indefinitely until VBUS
+ * is detected as long as Rp is not detected for
+ * more than a time period of tPDDebounce.
+ */
+ if (port->vbus_present && tcpm_port_is_sink(port)) {
+ tcpm_set_state(port, SNK_ATTACHED, 0);
+ break;
+ }
+ if (!tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
+ break;
+ case SNK_TRYWAIT_DEBOUNCE:
+ tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
+ break;
+ case SNK_ATTACHED:
+ ret = tcpm_snk_attach(port);
+ if (ret < 0)
+ tcpm_set_state(port, SNK_UNATTACHED, 0);
+ else
+ tcpm_set_state(port, SNK_STARTUP, 0);
+ break;
+ case SNK_STARTUP:
+ opmode = tcpm_get_pwr_opmode(port->polarity ?
+ port->cc2 : port->cc1);
+ typec_set_pwr_opmode(port->typec_port, opmode);
+ port->pwr_opmode = TYPEC_PWR_MODE_USB;
+ port->negotiated_rev = PD_MAX_REV;
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ port->explicit_contract = false;
+ tcpm_set_state(port, SNK_DISCOVERY, 0);
+ break;
+ case SNK_DISCOVERY:
+ if (port->vbus_present) {
+ tcpm_set_current_limit(port,
+ tcpm_get_current_limit(port),
+ 5000);
+ tcpm_set_charge(port, true);
+ tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
+ break;
+ }
+ /*
+ * For DRP, timeouts differ. Also, handling is supposed to be
+ * different and much more complex (dead battery detection;
+ * see USB power delivery specification, section 8.3.3.6.1.5.1).
+ */
+ tcpm_set_state(port, hard_reset_state(port),
+ port->port_type == TYPEC_PORT_DRP ?
+ PD_T_DB_DETECT : PD_T_NO_RESPONSE);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE:
+ tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
+ PD_T_CC_DEBOUNCE);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE_DONE:
+ if (!tcpm_port_is_disconnected(port) &&
+ tcpm_port_is_sink(port) &&
+ time_is_after_jiffies(port->delayed_runtime)) {
+ tcpm_set_state(port, SNK_DISCOVERY,
+ jiffies_to_msecs(port->delayed_runtime -
+ jiffies));
+ break;
+ }
+ tcpm_set_state(port, unattached_state(port), 0);
+ break;
+ case SNK_WAIT_CAPABILITIES:
+ ret = port->tcpc->set_pd_rx(port->tcpc, true);
+ if (ret < 0) {
+ tcpm_set_state(port, SNK_READY, 0);
+ break;
+ }
+ /*
+ * If VBUS has never been low, and we time out waiting
+ * for source cap, try a soft reset first, in case we
+ * were already in a stable contract before this boot.
+ * Do this only once.
+ */
+ if (port->vbus_never_low) {
+ port->vbus_never_low = false;
+ tcpm_set_state(port, SOFT_RESET_SEND,
+ PD_T_SINK_WAIT_CAP);
+ } else {
+ tcpm_set_state(port, hard_reset_state(port),
+ PD_T_SINK_WAIT_CAP);
+ }
+ break;
+ case SNK_NEGOTIATE_CAPABILITIES:
+ port->pd_capable = true;
+ port->hard_reset_count = 0;
+ ret = tcpm_pd_send_request(port);
+ if (ret < 0) {
+ /* Let the Source send capabilities again. */
+ tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state_cond(port, hard_reset_state(port),
+ PD_T_SENDER_RESPONSE);
+ }
+ break;
+ case SNK_NEGOTIATE_PPS_CAPABILITIES:
+ ret = tcpm_pd_send_pps_request(port);
+ if (ret < 0) {
+ port->pps_status = ret;
+ /*
+ * If this was called due to updates to sink
+ * capabilities, and pps is no longer valid, we should
+ * safely fall back to a standard PDO.
+ */
+ if (port->update_sink_caps)
+ tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
+ else
+ tcpm_set_state(port, SNK_READY, 0);
+ } else {
+ tcpm_set_state_cond(port, hard_reset_state(port),
+ PD_T_SENDER_RESPONSE);
+ }
+ break;
+ case SNK_TRANSITION_SINK:
+ case SNK_TRANSITION_SINK_VBUS:
+ tcpm_set_state(port, hard_reset_state(port),
+ PD_T_PS_TRANSITION);
+ break;
+ case SNK_READY:
+ port->try_snk_count = 0;
+ port->update_sink_caps = false;
+ if (port->explicit_contract) {
+ typec_set_pwr_opmode(port->typec_port,
+ TYPEC_PWR_MODE_PD);
+ port->pwr_opmode = TYPEC_PWR_MODE_PD;
+ }
+
+ tcpm_swap_complete(port, 0);
+ tcpm_typec_connect(port);
+ tcpm_check_send_discover(port);
+ tcpm_pps_complete(port, port->pps_status);
+
+ power_supply_changed(port->psy);
+
+ break;
+
+ /* Accessory states */
+ case ACC_UNATTACHED:
+ tcpm_acc_detach(port);
+ tcpm_set_state(port, SRC_UNATTACHED, 0);
+ break;
+ case DEBUG_ACC_ATTACHED:
+ case AUDIO_ACC_ATTACHED:
+ ret = tcpm_acc_attach(port);
+ if (ret < 0)
+ tcpm_set_state(port, ACC_UNATTACHED, 0);
+ break;
+ case AUDIO_ACC_DEBOUNCE:
+ tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
+ break;
+
+ /* Hard_Reset states */
+ case HARD_RESET_SEND:
+ /* TODO: Sync this with Rong.
+ tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
+ tcpm_set_state(port, HARD_RESET_START, 0);
+ */
+ tcpm_set_state(port, HARD_RESET_START, 0);
+ //tcpm_set_attached_state(port, true);
+ //tcpm_set_state(port, SNK_STARTUP, 0);
+ break;
+ case HARD_RESET_START:
+ port->hard_reset_count++;
+ port->tcpc->set_pd_rx(port->tcpc, false);
+ tcpm_unregister_altmodes(port);
+ port->send_discover = true;
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
+ PD_T_PS_HARD_RESET);
+ else
+ tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
+ break;
+ case SRC_HARD_RESET_VBUS_OFF:
+ tcpm_set_vconn(port, true);
+ tcpm_set_vbus(port, false);
+ tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
+ TYPEC_HOST);
+ tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
+ break;
+ case SRC_HARD_RESET_VBUS_ON:
+ tcpm_set_vbus(port, true);
+ port->tcpc->set_pd_rx(port->tcpc, true);
+ tcpm_set_attached_state(port, true);
+ tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
+ break;
+ case SNK_HARD_RESET_SINK_OFF:
+ memset(&port->pps_data, 0, sizeof(port->pps_data));
+ tcpm_set_vconn(port, false);
+ tcpm_set_charge(port, false);
+ tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
+ TYPEC_DEVICE);
+ /*
+ * VBUS may or may not toggle, depending on the adapter.
+ * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
+ * directly after timeout.
+ */
+ tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
+ break;
+ case SNK_HARD_RESET_WAIT_VBUS:
+ /* Assume we're disconnected if VBUS doesn't come back. */
+ tcpm_set_state(port, SNK_UNATTACHED,
+ PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
+ break;
+ case SNK_HARD_RESET_SINK_ON:
+ /* Note: There is no guarantee that VBUS is on in this state */
+ /*
+ * XXX:
+ * The specification suggests that dual mode ports in sink
+ * mode should transition to state PE_SRC_Transition_to_default.
+ * See USB power delivery specification chapter 8.3.3.6.1.3.
+ * This would mean to to
+ * - turn off VCONN, reset power supply
+ * - request hardware reset
+ * - turn on VCONN
+ * - Transition to state PE_Src_Startup
+ * SNK only ports shall transition to state Snk_Startup
+ * (see chapter 8.3.3.3.8).
+ * Similar, dual-mode ports in source mode should transition
+ * to PE_SNK_Transition_to_default.
+ */
+ tcpm_set_attached_state(port, true);
+ tcpm_set_state(port, SNK_STARTUP, 0);
+ break;
+
+ /* Soft_Reset states */
+ case SOFT_RESET:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
+ else
+ tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
+ break;
+ case SOFT_RESET_SEND:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
+ tcpm_set_state_cond(port, hard_reset_state(port), 0);
+ else
+ tcpm_set_state_cond(port, hard_reset_state(port),
+ PD_T_SENDER_RESPONSE);
+ break;
+
+ /* DR_Swap states */
+ case DR_SWAP_SEND:
+ tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
+ tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
+ PD_T_SENDER_RESPONSE);
+ break;
+ case DR_SWAP_ACCEPT:
+ tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
+ break;
+ case DR_SWAP_SEND_TIMEOUT:
+ tcpm_swap_complete(port, -ETIMEDOUT);
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case DR_SWAP_CHANGE_DR:
+ if (port->data_role == TYPEC_HOST) {
+ tcpm_unregister_altmodes(port);
+ tcpm_set_roles(port, true, port->pwr_role,
+ TYPEC_DEVICE);
+ } else {
+ tcpm_set_roles(port, true, port->pwr_role,
+ TYPEC_HOST);
+ port->send_discover = true;
+ }
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+
+ /* PR_Swap states */
+ case PR_SWAP_ACCEPT:
+ tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_state(port, PR_SWAP_START, 0);
+ break;
+ case PR_SWAP_SEND:
+ tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
+ tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
+ PD_T_SENDER_RESPONSE);
+ break;
+ case PR_SWAP_SEND_TIMEOUT:
+ tcpm_swap_complete(port, -ETIMEDOUT);
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case PR_SWAP_START:
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
+ PD_T_SRC_TRANSITION);
+ else
+ tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
+ break;
+ case PR_SWAP_SRC_SNK_TRANSITION_OFF:
+ tcpm_set_vbus(port, false);
+ port->explicit_contract = false;
+ /* allow time for Vbus discharge, must be < tSrcSwapStdby */
+ tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
+ PD_T_SRCSWAPSTDBY);
+ break;
+ case PR_SWAP_SRC_SNK_SOURCE_OFF:
+ tcpm_set_cc(port, TYPEC_CC_RD);
+ /* allow CC debounce */
+ tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
+ PD_T_CC_DEBOUNCE);
+ break;
+ case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
+ /*
+ * USB-PD standard, 6.2.1.4, Port Power Role:
+ * "During the Power Role Swap Sequence, for the initial Source
+ * Port, the Port Power Role field shall be set to Sink in the
+ * PS_RDY Message indicating that the initial Source’s power
+ * supply is turned off"
+ */
+ tcpm_set_pwr_role(port, TYPEC_SINK);
+ if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
+ tcpm_set_state(port, ERROR_RECOVERY, 0);
+ break;
+ }
+ tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
+ break;
+ case PR_SWAP_SRC_SNK_SINK_ON:
+ tcpm_set_state(port, SNK_STARTUP, 0);
+ break;
+ case PR_SWAP_SNK_SRC_SINK_OFF:
+ tcpm_set_charge(port, false);
+ tcpm_set_state(port, hard_reset_state(port),
+ PD_T_PS_SOURCE_OFF);
+ break;
+ case PR_SWAP_SNK_SRC_SOURCE_ON:
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ tcpm_set_vbus(port, true);
+ /*
+ * allow time VBUS ramp-up, must be < tNewSrc
+ * Also, this window overlaps with CC debounce as well.
+ * So, Wait for the max of two which is PD_T_NEWSRC
+ */
+ tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
+ PD_T_NEWSRC);
+ break;
+ case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
+ /*
+ * USB PD standard, 6.2.1.4:
+ * "Subsequent Messages initiated by the Policy Engine,
+ * such as the PS_RDY Message sent to indicate that Vbus
+ * is ready, will have the Port Power Role field set to
+ * Source."
+ */
+ tcpm_set_pwr_role(port, TYPEC_SOURCE);
+ tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
+ tcpm_set_state(port, SRC_STARTUP, 0);
+ break;
+
+ case VCONN_SWAP_ACCEPT:
+ tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_state(port, VCONN_SWAP_START, 0);
+ break;
+ case VCONN_SWAP_SEND:
+ tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
+ tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
+ PD_T_SENDER_RESPONSE);
+ break;
+ case VCONN_SWAP_SEND_TIMEOUT:
+ tcpm_swap_complete(port, -ETIMEDOUT);
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case VCONN_SWAP_START:
+ if (port->vconn_role == TYPEC_SOURCE)
+ tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
+ else
+ tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
+ break;
+ case VCONN_SWAP_WAIT_FOR_VCONN:
+ tcpm_set_state(port, hard_reset_state(port),
+ PD_T_VCONN_SOURCE_ON);
+ break;
+ case VCONN_SWAP_TURN_ON_VCONN:
+ tcpm_set_vconn(port, true);
+ tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case VCONN_SWAP_TURN_OFF_VCONN:
+ tcpm_set_vconn(port, false);
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+
+ case DR_SWAP_CANCEL:
+ case PR_SWAP_CANCEL:
+ case VCONN_SWAP_CANCEL:
+ tcpm_swap_complete(port, port->swap_status);
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(port, SRC_READY, 0);
+ else
+ tcpm_set_state(port, SNK_READY, 0);
+ break;
+
+ case BIST_RX:
+ switch (BDO_MODE_MASK(port->bist_request)) {
+ case BDO_MODE_CARRIER2:
+ tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
+ break;
+ default:
+ break;
+ }
+ /* Always switch to unattached state */
+ tcpm_set_state(port, unattached_state(port), 0);
+ break;
+ case GET_STATUS_SEND:
+ tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
+ tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
+ PD_T_SENDER_RESPONSE);
+ break;
+ case GET_STATUS_SEND_TIMEOUT:
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case GET_PPS_STATUS_SEND:
+ tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
+ tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
+ PD_T_SENDER_RESPONSE);
+ break;
+ case GET_PPS_STATUS_SEND_TIMEOUT:
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
+ case ERROR_RECOVERY:
+ tcpm_swap_complete(port, -EPROTO);
+ tcpm_pps_complete(port, -EPROTO);
+ tcpm_set_state(port, PORT_RESET, 0);
+ break;
+ case PORT_RESET:
+ tcpm_reset_port(port);
+ //tcpm_set_cc(port, TYPEC_CC_OPEN);
+ if (port->port_type == TYPEC_PORT_SNK) {
+ tcpm_set_state(port, tcpm_default_state(port), 0);
+ } else {
+ tcpm_set_state(port, PORT_RESET_WAIT_OFF,
+ PD_T_ERROR_RECOVERY);
+ }
+ break;
+ case PORT_RESET_WAIT_OFF:
+ tcpm_set_state(port,
+ tcpm_default_state(port),
+ port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
+ break;
+ default:
+ WARN(1, "Unexpected port state %d\n", port->state);
+ break;
+ }
+}
+
+static void tcpm_state_machine_work(struct work_struct *work)
+{
+ struct tcpm_port *port = container_of(work, struct tcpm_port,
+ state_machine.work);
+ enum tcpm_state prev_state;
+
+ mutex_lock(&port->lock);
+ port->state_machine_running = true;
+
+ if (port->queued_message && tcpm_send_queued_message(port))
+ goto done;
+
+ /* If we were queued due to a delayed state change, update it now */
+ if (port->delayed_state) {
+ tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
+ tcpm_states[port->state],
+ tcpm_states[port->delayed_state], port->delay_ms);
+ port->prev_state = port->state;
+ port->state = port->delayed_state;
+ port->delayed_state = INVALID_STATE;
+ }
+
+ /*
+ * Continue running as long as we have (non-delayed) state changes
+ * to make.
+ */
+ do {
+ prev_state = port->state;
+ run_state_machine(port);
+ if (port->queued_message)
+ tcpm_send_queued_message(port);
+ } while (port->state != prev_state && !port->delayed_state);
+
+done:
+ port->state_machine_running = false;
+ mutex_unlock(&port->lock);
+}
+
+static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
+ enum typec_cc_status cc2)
+{
+ enum typec_cc_status old_cc1, old_cc2;
+ enum tcpm_state new_state;
+
+ old_cc1 = port->cc1;
+ old_cc2 = port->cc2;
+ port->cc1 = cc1;
+ port->cc2 = cc2;
+
+ tcpm_log_force(port,
+ "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
+ old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
+ port->polarity,
+ tcpm_port_is_disconnected(port) ? "disconnected"
+ : "connected");
+
+ switch (port->state) {
+ case DRP_TOGGLING:
+ if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
+ tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
+ else if (tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
+ break;
+ case SRC_UNATTACHED:
+ case ACC_UNATTACHED:
+ if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
+ tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
+ break;
+ case SRC_ATTACH_WAIT:
+ if (tcpm_port_is_disconnected(port) ||
+ tcpm_port_is_audio_detached(port))
+ tcpm_set_state(port, SRC_UNATTACHED, 0);
+ else if (cc1 != old_cc1 || cc2 != old_cc2)
+ tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
+ break;
+ case SRC_ATTACHED:
+ case SRC_SEND_CAPABILITIES:
+ case SRC_READY:
+ if (tcpm_port_is_disconnected(port) ||
+ !tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_UNATTACHED, 0);
+ break;
+ case SNK_UNATTACHED:
+ if (tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
+ break;
+ case SNK_ATTACH_WAIT:
+ if ((port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 != TYPEC_CC_OPEN) ||
+ (port->cc1 != TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN))
+ new_state = SNK_DEBOUNCED;
+ else if (tcpm_port_is_disconnected(port))
+ new_state = SNK_UNATTACHED;
+ else
+ break;
+ if (new_state != port->delayed_state)
+ tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
+ break;
+ case SNK_DEBOUNCED:
+ if (tcpm_port_is_disconnected(port))
+ new_state = SNK_UNATTACHED;
+ else if (port->vbus_present)
+ new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
+ else
+ new_state = SNK_UNATTACHED;
+ if (new_state != port->delayed_state)
+ tcpm_set_state(port, SNK_DEBOUNCED, 0);
+ break;
+ case SNK_READY:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(port, unattached_state(port), 0);
+ else if (!port->pd_capable &&
+ (cc1 != old_cc1 || cc2 != old_cc2))
+ tcpm_set_current_limit(port,
+ tcpm_get_current_limit(port),
+ 5000);
+ break;
+
+ case AUDIO_ACC_ATTACHED:
+ if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
+ tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
+ break;
+ case AUDIO_ACC_DEBOUNCE:
+ if (tcpm_port_is_audio(port))
+ tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
+ break;
+
+ case DEBUG_ACC_ATTACHED:
+ if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
+ tcpm_set_state(port, ACC_UNATTACHED, 0);
+ break;
+
+ case SNK_TRY:
+ /* Do nothing, waiting for timeout */
+ break;
+
+ case SNK_DISCOVERY:
+ /* CC line is unstable, wait for debounce */
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE:
+ break;
+
+ case SRC_TRYWAIT:
+ /* Hand over to state machine if needed */
+ if (!port->vbus_present && tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
+ break;
+ case SRC_TRYWAIT_DEBOUNCE:
+ if (port->vbus_present || !tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_TRYWAIT, 0);
+ break;
+ case SNK_TRY_WAIT_DEBOUNCE:
+ if (!tcpm_port_is_sink(port)) {
+ port->max_wait = 0;
+ tcpm_set_state(port, SRC_TRYWAIT, 0);
+ }
+ break;
+ case SRC_TRY_WAIT:
+ if (tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
+ break;
+ case SRC_TRY_DEBOUNCE:
+ tcpm_set_state(port, SRC_TRY_WAIT, 0);
+ break;
+ case SNK_TRYWAIT_DEBOUNCE:
+ if (tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
+ break;
+ case SNK_TRYWAIT_VBUS:
+ if (!tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
+ break;
+ case SNK_TRYWAIT:
+ /* Do nothing, waiting for tCCDebounce */
+ break;
+ case PR_SWAP_SNK_SRC_SINK_OFF:
+ case PR_SWAP_SRC_SNK_TRANSITION_OFF:
+ case PR_SWAP_SRC_SNK_SOURCE_OFF:
+ case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
+ case PR_SWAP_SNK_SRC_SOURCE_ON:
+ /*
+ * CC state change is expected in PR_SWAP
+ * Ignore it.
+ */
+ break;
+
+ default:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(port, unattached_state(port), 0);
+ break;
+ }
+}
+
+static void _tcpm_pd_vbus_on(struct tcpm_port *port)
+{
+ tcpm_log_force(port, "VBUS on");
+ port->vbus_present = true;
+ switch (port->state) {
+ case SNK_TRANSITION_SINK_VBUS:
+ port->explicit_contract = true;
+ tcpm_set_state(port, SNK_READY, 0);
+ break;
+ case SNK_DISCOVERY:
+ tcpm_set_state(port, SNK_DISCOVERY, 0);
+ break;
+
+ case SNK_DEBOUNCED:
+ tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
+ : SNK_ATTACHED,
+ 0);
+ break;
+ case SNK_HARD_RESET_WAIT_VBUS:
+ tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
+ break;
+ case SRC_ATTACHED:
+ tcpm_set_state(port, SRC_STARTUP, 0);
+ break;
+ case SRC_HARD_RESET_VBUS_ON:
+ tcpm_set_state(port, SRC_STARTUP, 0);
+ break;
+
+ case SNK_TRY:
+ /* Do nothing, waiting for timeout */
+ break;
+ case SRC_TRYWAIT:
+ /* Do nothing, Waiting for Rd to be detected */
+ break;
+ case SRC_TRYWAIT_DEBOUNCE:
+ tcpm_set_state(port, SRC_TRYWAIT, 0);
+ break;
+ case SNK_TRY_WAIT_DEBOUNCE:
+ /* Do nothing, waiting for PD_DEBOUNCE to do be done */
+ break;
+ case SNK_TRYWAIT:
+ /* Do nothing, waiting for tCCDebounce */
+ break;
+ case SNK_TRYWAIT_VBUS:
+ if (tcpm_port_is_sink(port))
+ tcpm_set_state(port, SNK_ATTACHED, 0);
+ break;
+ case SNK_TRYWAIT_DEBOUNCE:
+ /* Do nothing, waiting for Rp */
+ break;
+ case SRC_TRY_WAIT:
+ case SRC_TRY_DEBOUNCE:
+ /* Do nothing, waiting for sink detection */
+ break;
+ default:
+ break;
+ }
+}
+
+static void _tcpm_pd_vbus_off(struct tcpm_port *port)
+{
+ tcpm_log_force(port, "VBUS off");
+ port->vbus_present = false;
+ port->vbus_never_low = false;
+ switch (port->state) {
+ case SNK_HARD_RESET_SINK_OFF:
+ tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
+ break;
+ case SRC_HARD_RESET_VBUS_OFF:
+ tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
+ break;
+ case HARD_RESET_SEND:
+ break;
+
+ case SNK_TRY:
+ /* Do nothing, waiting for timeout */
+ break;
+ case SRC_TRYWAIT:
+ /* Hand over to state machine if needed */
+ if (tcpm_port_is_source(port))
+ tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
+ break;
+ case SNK_TRY_WAIT_DEBOUNCE:
+ /* Do nothing, waiting for PD_DEBOUNCE to do be done */
+ break;
+ case SNK_TRYWAIT:
+ case SNK_TRYWAIT_VBUS:
+ case SNK_TRYWAIT_DEBOUNCE:
+ break;
+ case SNK_ATTACH_WAIT:
+ tcpm_set_state(port, SNK_UNATTACHED, 0);
+ break;
+
+ case SNK_NEGOTIATE_CAPABILITIES:
+ break;
+
+ case PR_SWAP_SRC_SNK_TRANSITION_OFF:
+ tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
+ break;
+
+ case PR_SWAP_SNK_SRC_SINK_OFF:
+ /* Do nothing, expected */
+ break;
+
+ case PORT_RESET_WAIT_OFF:
+ tcpm_set_state(port, tcpm_default_state(port), 0);
+ break;
+ case SRC_TRY_WAIT:
+ case SRC_TRY_DEBOUNCE:
+ /* Do nothing, waiting for sink detection */
+ break;
+ default:
+ if (port->pwr_role == TYPEC_SINK &&
+ port->attached)
+ tcpm_set_state(port, SNK_UNATTACHED, 0);
+ break;
+ }
+}
+
+static void _tcpm_pd_hard_reset(struct tcpm_port *port)
+{
+ tcpm_log_force(port, "Received hard reset");
+ /*
+ * If we keep receiving hard reset requests, executing the hard reset
+ * must have failed. Revert to error recovery if that happens.
+ */
+ tcpm_set_state(port,
+ port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
+ HARD_RESET_START : ERROR_RECOVERY,
+ 0);
+}
+
+static void tcpm_pd_event_handler(struct work_struct *work)
+{
+ struct tcpm_port *port = container_of(work, struct tcpm_port,
+ event_work);
+ u32 events;
+
+ mutex_lock(&port->lock);
+
+ spin_lock(&port->pd_event_lock);
+ while (port->pd_events) {
+ events = port->pd_events;
+ port->pd_events = 0;
+ spin_unlock(&port->pd_event_lock);
+ if (events & TCPM_RESET_EVENT)
+ _tcpm_pd_hard_reset(port);
+ if (events & TCPM_VBUS_EVENT) {
+ bool vbus;
+
+ vbus = port->tcpc->get_vbus(port->tcpc);
+ if (vbus)
+ _tcpm_pd_vbus_on(port);
+ else
+ _tcpm_pd_vbus_off(port);
+ }
+ if (events & TCPM_CC_EVENT) {
+ enum typec_cc_status cc1, cc2;
+
+ if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
+ _tcpm_cc_change(port, cc1, cc2);
+ }
+ spin_lock(&port->pd_event_lock);
+ }
+ spin_unlock(&port->pd_event_lock);
+ mutex_unlock(&port->lock);
+}
+
+void tcpm_cc_change(struct tcpm_port *port)
+{
+ spin_lock(&port->pd_event_lock);
+ port->pd_events |= TCPM_CC_EVENT;
+ spin_unlock(&port->pd_event_lock);
+ queue_work(port->wq, &port->event_work);
+}
+EXPORT_SYMBOL_GPL(tcpm_cc_change);
+
+void tcpm_vbus_change(struct tcpm_port *port)
+{
+ spin_lock(&port->pd_event_lock);
+ port->pd_events |= TCPM_VBUS_EVENT;
+ spin_unlock(&port->pd_event_lock);
+ queue_work(port->wq, &port->event_work);
+}
+EXPORT_SYMBOL_GPL(tcpm_vbus_change);
+
+void tcpm_pd_hard_reset(struct tcpm_port *port)
+{
+ spin_lock(&port->pd_event_lock);
+ port->pd_events = TCPM_RESET_EVENT;
+ spin_unlock(&port->pd_event_lock);
+ queue_work(port->wq, &port->event_work);
+}
+EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
+
+static int tcpm_dr_set(const struct typec_capability *cap,
+ enum typec_data_role data)
+{
+ struct tcpm_port *port = typec_cap_to_tcpm(cap);
+ int ret;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (port->port_type != TYPEC_PORT_DRP) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+ if (port->state != SRC_READY && port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ if (port->data_role == data) {
+ ret = 0;
+ goto port_unlock;
+ }
+
+ /*
+ * XXX
+ * 6.3.9: If an alternate mode is active, a request to swap
+ * alternate modes shall trigger a port reset.
+ * Reject data role swap request in this case.
+ */
+
+ if (!port->pd_capable) {
+ /*
+ * If the partner is not PD capable, reset the port to
+ * trigger a role change. This can only work if a preferred
+ * role is configured, and if it matches the requested role.
+ */
+ if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
+ port->try_role == port->pwr_role) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+ port->non_pd_role_swap = true;
+ tcpm_set_state(port, PORT_RESET, 0);
+ } else {
+ tcpm_set_state(port, DR_SWAP_SEND, 0);
+ }
+
+ port->swap_status = 0;
+ port->swap_pending = true;
+ reinit_completion(&port->swap_complete);
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->swap_complete,
+ msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->swap_status;
+
+ port->non_pd_role_swap = false;
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+ return ret;
+}
+
+static int tcpm_pr_set(const struct typec_capability *cap,
+ enum typec_role role)
+{
+ struct tcpm_port *port = typec_cap_to_tcpm(cap);
+ int ret;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (port->port_type != TYPEC_PORT_DRP) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+ if (port->state != SRC_READY && port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ if (role == port->pwr_role) {
+ ret = 0;
+ goto port_unlock;
+ }
+
+ port->swap_status = 0;
+ port->swap_pending = true;
+ reinit_completion(&port->swap_complete);
+ tcpm_set_state(port, PR_SWAP_SEND, 0);
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->swap_complete,
+ msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->swap_status;
+
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+ return ret;
+}
+
+static int tcpm_vconn_set(const struct typec_capability *cap,
+ enum typec_role role)
+{
+ struct tcpm_port *port = typec_cap_to_tcpm(cap);
+ int ret;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (port->state != SRC_READY && port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ if (role == port->vconn_role) {
+ ret = 0;
+ goto port_unlock;
+ }
+
+ port->swap_status = 0;
+ port->swap_pending = true;
+ reinit_completion(&port->swap_complete);
+ tcpm_set_state(port, VCONN_SWAP_SEND, 0);
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->swap_complete,
+ msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->swap_status;
+
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+ return ret;
+}
+
+static int tcpm_try_role(const struct typec_capability *cap, int role)
+{
+ struct tcpm_port *port = typec_cap_to_tcpm(cap);
+ struct tcpc_dev *tcpc = port->tcpc;
+ int ret = 0;
+
+ mutex_lock(&port->lock);
+ if (tcpc->try_role)
+ ret = tcpc->try_role(tcpc, role);
+ if (!ret && (!tcpc->config || !tcpc->config->try_role_hw))
+ port->try_role = role;
+ port->try_src_count = 0;
+ port->try_snk_count = 0;
+ mutex_unlock(&port->lock);
+
+ return ret;
+}
+
+static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
+{
+ unsigned int target_mw;
+ int ret;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (!port->pps_data.active) {
+ ret = -EOPNOTSUPP;
+ goto port_unlock;
+ }
+
+ if (port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ if (op_curr > port->pps_data.max_curr) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+
+ target_mw = (op_curr * port->pps_data.out_volt) / 1000;
+ if (target_mw < port->operating_snk_mw) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+
+ /* Round down operating current to align with PPS valid steps */
+ op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP);
+
+ reinit_completion(&port->pps_complete);
+ port->pps_data.op_curr = op_curr;
+ port->pps_status = 0;
+ port->pps_pending = true;
+ tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->pps_complete,
+ msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->pps_status;
+
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+
+ return ret;
+}
+
+static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
+{
+ unsigned int target_mw;
+ int ret;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (!port->pps_data.active) {
+ ret = -EOPNOTSUPP;
+ goto port_unlock;
+ }
+
+ if (port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ if (out_volt < port->pps_data.min_volt ||
+ out_volt > port->pps_data.max_volt) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+
+ target_mw = (port->pps_data.op_curr * out_volt) / 1000;
+ if (target_mw < port->operating_snk_mw) {
+ ret = -EINVAL;
+ goto port_unlock;
+ }
+
+ /* Round down output voltage to align with PPS valid steps */
+ out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP);
+
+ reinit_completion(&port->pps_complete);
+ port->pps_data.out_volt = out_volt;
+ port->pps_status = 0;
+ port->pps_pending = true;
+ tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->pps_complete,
+ msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->pps_status;
+
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+
+ return ret;
+}
+
+static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
+{
+ int ret = 0;
+
+ mutex_lock(&port->swap_lock);
+ mutex_lock(&port->lock);
+
+ if (!port->pps_data.supported) {
+ ret = -EOPNOTSUPP;
+ goto port_unlock;
+ }
+
+ /* Trying to deactivate PPS when already deactivated so just bail */
+ if (!port->pps_data.active && !activate)
+ goto port_unlock;
+
+ if (port->state != SNK_READY) {
+ ret = -EAGAIN;
+ goto port_unlock;
+ }
+
+ reinit_completion(&port->pps_complete);
+ port->pps_status = 0;
+ port->pps_pending = true;
+
+ /* Trigger PPS request or move back to standard PDO contract */
+ if (activate) {
+ port->pps_data.out_volt = port->supply_voltage;
+ port->pps_data.op_curr = port->current_limit;
+ tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
+ }
+ mutex_unlock(&port->lock);
+
+ if (!wait_for_completion_timeout(&port->pps_complete,
+ msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
+ ret = -ETIMEDOUT;
+ else
+ ret = port->pps_status;
+
+ goto swap_unlock;
+
+port_unlock:
+ mutex_unlock(&port->lock);
+swap_unlock:
+ mutex_unlock(&port->swap_lock);
+
+ return ret;
+}
+
+static void tcpm_init(struct tcpm_port *port)
+{
+ enum typec_cc_status cc1, cc2;
+
+ port->tcpc->init(port->tcpc);
+
+ tcpm_reset_port(port);
+
+ /*
+ * XXX
+ * Should possibly wait for VBUS to settle if it was enabled locally
+ * since tcpm_reset_port() will disable VBUS.
+ */
+ port->vbus_present = port->tcpc->get_vbus(port->tcpc);
+ if (port->vbus_present)
+ port->vbus_never_low = true;
+
+ tcpm_set_state(port, tcpm_default_state(port), 0);
+
+ if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
+ _tcpm_cc_change(port, cc1, cc2);
+
+ /*
+ * Some adapters need a clean slate at startup, and won't recover
+ * otherwise. So do not try to be fancy and force a clean disconnect.
+ */
+ tcpm_set_state(port, PORT_RESET, 0);
+}
+
+static int tcpm_port_type_set(const struct typec_capability *cap,
+ enum typec_port_type type)
+{
+ struct tcpm_port *port = typec_cap_to_tcpm(cap);
+
+ mutex_lock(&port->lock);
+ if (type == port->port_type)
+ goto port_unlock;
+
+ port->port_type = type;
+
+ if (!port->connected) {
+ tcpm_set_state(port, PORT_RESET, 0);
+ } else if (type == TYPEC_PORT_SNK) {
+ if (!(port->pwr_role == TYPEC_SINK &&
+ port->data_role == TYPEC_DEVICE))
+ tcpm_set_state(port, PORT_RESET, 0);
+ } else if (type == TYPEC_PORT_SRC) {
+ if (!(port->pwr_role == TYPEC_SOURCE &&
+ port->data_role == TYPEC_HOST))
+ tcpm_set_state(port, PORT_RESET, 0);
+ }
+
+port_unlock:
+ mutex_unlock(&port->lock);
+ return 0;
+}
+
+void tcpm_tcpc_reset(struct tcpm_port *port)
+{
+ mutex_lock(&port->lock);
+ /* XXX: Maintain PD connection if possible? */
+ tcpm_init(port);
+ mutex_unlock(&port->lock);
+}
+EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
+
+static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
+ unsigned int nr_pdo)
+{
+ unsigned int i;
+
+ if (nr_pdo > PDO_MAX_OBJECTS)
+ nr_pdo = PDO_MAX_OBJECTS;
+
+ for (i = 0; i < nr_pdo; i++)
+ dest_pdo[i] = src_pdo[i];
+
+ return nr_pdo;
+}
+
+static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
+ unsigned int nr_vdo)
+{
+ unsigned int i;
+
+ if (nr_vdo > VDO_MAX_OBJECTS)
+ nr_vdo = VDO_MAX_OBJECTS;
+
+ for (i = 0; i < nr_vdo; i++)
+ dest_vdo[i] = src_vdo[i];
+
+ return nr_vdo;
+}
+
+static int tcpm_fw_get_caps(struct tcpm_port *port,
+ struct fwnode_handle *fwnode)
+{
+ const char *cap_str;
+ int ret;
+ u32 mw;
+
+ if (!fwnode)
+ return -EINVAL;
+
+ /* VCONN capability is true by default */
+ port->typec_caps.no_vconn = fwnode_property_read_bool(fwnode,
+ "no-vconn");
+
+ /* USB data support is optional */
+ ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
+ if (ret == 0) {
+ port->typec_caps.data = typec_find_port_data_role(cap_str);
+ if (port->typec_caps.data < 0)
+ return -EINVAL;
+ }
+
+ ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
+ if (ret < 0)
+ return ret;
+
+ port->typec_caps.type = typec_find_port_power_role(cap_str);
+ if (port->typec_caps.type < 0)
+ return -EINVAL;
+ port->port_type = port->typec_caps.type;
+
+ if (port->port_type == TYPEC_PORT_SNK)
+ goto sink;
+
+ /* Get source pdos */
+ ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
+ NULL, 0);
+ if (ret <= 0)
+ return -EINVAL;
+
+ port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
+ ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
+ port->src_pdo, port->nr_src_pdo);
+ if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
+ port->nr_src_pdo))
+ return -EINVAL;
+
+ if (port->port_type == TYPEC_PORT_SRC)
+ return 0;
+
+ /* Get the preferred power role for DRP */
+ ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
+ if (ret < 0)
+ return ret;
+
+ port->typec_caps.prefer_role = typec_find_power_role(cap_str);
+ if (port->typec_caps.prefer_role < 0)
+ return -EINVAL;
+sink:
+ /* Get sink pdos */
+ ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
+ NULL, 0);
+ if (ret <= 0)
+ return -EINVAL;
+
+ port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
+ ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
+ port->snk_pdo, port->nr_snk_pdo);
+ if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
+ port->nr_snk_pdo))
+ return -EINVAL;
+
+ if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
+ return -EINVAL;
+ port->operating_snk_mw = mw / 1000;
+
+ port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
+
+ return 0;
+}
+
+int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo)
+{
+ if (tcpm_validate_caps(port, pdo, nr_pdo))
+ return -EINVAL;
+
+ mutex_lock(&port->lock);
+ port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo);
+ switch (port->state) {
+ case SRC_UNATTACHED:
+ case SRC_ATTACH_WAIT:
+ case SRC_TRYWAIT:
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ break;
+ case SRC_SEND_CAPABILITIES:
+ case SRC_NEGOTIATE_CAPABILITIES:
+ case SRC_READY:
+ case SRC_WAIT_NEW_CAPABILITIES:
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&port->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
+
+int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo,
+ unsigned int operating_snk_mw)
+{
+ if (tcpm_validate_caps(port, pdo, nr_pdo))
+ return -EINVAL;
+
+ mutex_lock(&port->lock);
+ port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
+ port->operating_snk_mw = operating_snk_mw;
+ port->update_sink_caps = true;
+
+ switch (port->state) {
+ case SNK_NEGOTIATE_CAPABILITIES:
+ case SNK_NEGOTIATE_PPS_CAPABILITIES:
+ case SNK_READY:
+ case SNK_TRANSITION_SINK:
+ case SNK_TRANSITION_SINK_VBUS:
+ if (port->pps_data.active)
+ tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
+ else
+ tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&port->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
+
+/* Power Supply access to expose source power information */
+enum tcpm_psy_online_states {
+ TCPM_PSY_OFFLINE = 0,
+ TCPM_PSY_FIXED_ONLINE,
+ TCPM_PSY_PROG_ONLINE,
+};
+
+static enum power_supply_property tcpm_psy_props[] = {
+ POWER_SUPPLY_PROP_USB_TYPE,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+};
+
+static int tcpm_psy_get_online(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ if (port->vbus_charge) {
+ if (port->pps_data.active)
+ val->intval = TCPM_PSY_PROG_ONLINE;
+ else
+ val->intval = TCPM_PSY_FIXED_ONLINE;
+ } else {
+ val->intval = TCPM_PSY_OFFLINE;
+ }
+
+ return 0;
+}
+
+static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ if (port->pps_data.active)
+ val->intval = port->pps_data.min_volt * 1000;
+ else
+ val->intval = port->supply_voltage * 1000;
+
+ return 0;
+}
+
+static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ if (port->pps_data.active)
+ val->intval = port->pps_data.max_volt * 1000;
+ else
+ val->intval = port->supply_voltage * 1000;
+
+ return 0;
+}
+
+static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ val->intval = port->supply_voltage * 1000;
+
+ return 0;
+}
+
+static int tcpm_psy_get_current_max(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ if (port->pps_data.active)
+ val->intval = port->pps_data.max_curr * 1000;
+ else
+ val->intval = max(tcpm_get_max_fixed_current(port),
+ port->current_limit) * 1000;
+
+ return 0;
+}
+
+static int tcpm_psy_get_current_now(struct tcpm_port *port,
+ union power_supply_propval *val)
+{
+ val->intval = port->current_limit * 1000;
+
+ return 0;
+}
+
+static int tcpm_psy_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct tcpm_port *port = power_supply_get_drvdata(psy);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ val->intval = port->usb_type;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = tcpm_psy_get_online(port, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ ret = tcpm_psy_get_voltage_min(port, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ ret = tcpm_psy_get_voltage_max(port, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = tcpm_psy_get_voltage_now(port, val);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ ret = tcpm_psy_get_current_max(port, val);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = tcpm_psy_get_current_now(port, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int tcpm_psy_set_online(struct tcpm_port *port,
+ const union power_supply_propval *val)
+{
+ int ret;
+
+ switch (val->intval) {
+ case TCPM_PSY_FIXED_ONLINE:
+ ret = tcpm_pps_activate(port, false);
+ break;
+ case TCPM_PSY_PROG_ONLINE:
+ ret = tcpm_pps_activate(port, true);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int tcpm_psy_set_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct tcpm_port *port = power_supply_get_drvdata(psy);
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = tcpm_psy_set_online(port, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ if (val->intval < port->pps_data.min_volt * 1000 ||
+ val->intval > port->pps_data.max_volt * 1000)
+ ret = -EINVAL;
+ else
+ ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ if (val->intval > port->pps_data.max_curr * 1000)
+ ret = -EINVAL;
+ else
+ ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int tcpm_psy_prop_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static enum power_supply_usb_type tcpm_psy_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_C,
+ POWER_SUPPLY_USB_TYPE_PD,
+ POWER_SUPPLY_USB_TYPE_PD_PPS,
+};
+
+static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
+
+static int devm_tcpm_psy_register(struct tcpm_port *port)
+{
+ struct power_supply_config psy_cfg = {};
+ const char *port_dev_name = dev_name(port->dev);
+ size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
+ strlen(port_dev_name) + 1;
+ char *psy_name;
+
+ psy_cfg.drv_data = port;
+ psy_cfg.fwnode = dev_fwnode(port->dev);
+ psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
+ if (!psy_name)
+ return -ENOMEM;
+
+ snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
+ port_dev_name);
+ port->psy_desc.name = psy_name;
+ port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
+ port->psy_desc.usb_types = tcpm_psy_usb_types;
+ port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
+ port->psy_desc.properties = tcpm_psy_props,
+ port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
+ port->psy_desc.get_property = tcpm_psy_get_prop,
+ port->psy_desc.set_property = tcpm_psy_set_prop,
+ port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
+
+ port->usb_type = POWER_SUPPLY_USB_TYPE_C;
+
+ port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
+ &psy_cfg);
+
+ return PTR_ERR_OR_ZERO(port->psy);
+}
+
+static int tcpm_copy_caps(struct tcpm_port *port,
+ const struct tcpc_config *tcfg)
+{
+ if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
+ tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
+ return -EINVAL;
+
+ port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
+ tcfg->nr_src_pdo);
+ port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
+ tcfg->nr_snk_pdo);
+
+ port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
+ tcfg->nr_snk_vdo);
+
+ port->operating_snk_mw = tcfg->operating_snk_mw;
+
+ port->typec_caps.prefer_role = tcfg->default_role;
+ port->typec_caps.type = tcfg->type;
+ port->typec_caps.data = tcfg->data;
+ port->self_powered = tcfg->self_powered;
+
+ return 0;
+}
+
+struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
+{
+ struct tcpm_port *port;
+ int i, err;
+
+ if (!dev || !tcpc ||
+ !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
+ !tcpc->set_polarity || !tcpc->set_vconn ||
+ !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
+ return ERR_PTR(-EINVAL);
+
+ port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return ERR_PTR(-ENOMEM);
+
+ port->dev = dev;
+ port->tcpc = tcpc;
+
+ mutex_init(&port->lock);
+ mutex_init(&port->swap_lock);
+
+ port->wq = create_singlethread_workqueue(dev_name(dev));
+ if (!port->wq)
+ return ERR_PTR(-ENOMEM);
+ INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
+ INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
+ INIT_WORK(&port->event_work, tcpm_pd_event_handler);
+
+ spin_lock_init(&port->pd_event_lock);
+
+ init_completion(&port->tx_complete);
+ init_completion(&port->swap_complete);
+ init_completion(&port->pps_complete);
+ tcpm_debugfs_init(port);
+
+ err = tcpm_fw_get_caps(port, tcpc->fwnode);
+ if ((err < 0) && tcpc->config)
+ err = tcpm_copy_caps(port, tcpc->config);
+ if (err < 0)
+ goto out_destroy_wq;
+
+ if (!tcpc->config || !tcpc->config->try_role_hw)
+ port->try_role = port->typec_caps.prefer_role;
+ else
+ port->try_role = TYPEC_NO_PREFERRED_ROLE;
+
+ port->typec_caps.fwnode = tcpc->fwnode;
+ port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
+ port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
+ port->typec_caps.dr_set = tcpm_dr_set;
+ port->typec_caps.pr_set = tcpm_pr_set;
+ port->typec_caps.vconn_set = tcpm_vconn_set;
+ port->typec_caps.try_role = tcpm_try_role;
+ port->typec_caps.port_type_set = tcpm_port_type_set;
+
+ port->partner_desc.identity = &port->partner_ident;
+ port->port_type = port->typec_caps.type;
+
+ port->role_sw = usb_role_switch_get(port->dev);
+ if (IS_ERR(port->role_sw)) {
+ err = PTR_ERR(port->role_sw);
+ goto out_destroy_wq;
+ }
+
+ err = devm_tcpm_psy_register(port);
+ if (err)
+ goto out_destroy_wq;
+
+ port->typec_port = typec_register_port(port->dev, &port->typec_caps);
+ if (IS_ERR(port->typec_port)) {
+ err = PTR_ERR(port->typec_port);
+ goto out_destroy_wq;
+ }
+
+ if (tcpc->config && tcpc->config->alt_modes) {
+ const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
+
+ i = 0;
+ while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
+ struct typec_altmode *alt;
+
+ alt = typec_port_register_altmode(port->typec_port,
+ paltmode);
+ if (IS_ERR(alt)) {
+ tcpm_log(port,
+ "%s: failed to register port alternate mode 0x%x",
+ dev_name(dev), paltmode->svid);
+ break;
+ }
+ typec_altmode_set_drvdata(alt, port);
+ alt->ops = &tcpm_altmode_ops;
+ port->port_altmode[i] = alt;
+ i++;
+ paltmode++;
+ }
+ }
+
+ mutex_lock(&port->lock);
+ tcpm_init(port);
+ mutex_unlock(&port->lock);
+
+ tcpm_log(port, "%s: registered", dev_name(dev));
+ return port;
+
+out_destroy_wq:
+ usb_role_switch_put(port->role_sw);
+ destroy_workqueue(port->wq);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(tcpm_register_port);
+
+void tcpm_unregister_port(struct tcpm_port *port)
+{
+ int i;
+
+ tcpm_reset_port(port);
+ for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
+ typec_unregister_altmode(port->port_altmode[i]);
+ typec_unregister_port(port->typec_port);
+ usb_role_switch_put(port->role_sw);
+ tcpm_debugfs_exit(port);
+ destroy_workqueue(port->wq);
+}
+EXPORT_SYMBOL_GPL(tcpm_unregister_port);
+
+MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
+MODULE_DESCRIPTION("USB Type-C Port Manager");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __DT_POWER_DELIVERY_H
+#define __DT_POWER_DELIVERY_H
+
+/* Power delivery Power Data Object definitions */
+#define PDO_TYPE_FIXED 0
+#define PDO_TYPE_BATT 1
+#define PDO_TYPE_VAR 2
+#define PDO_TYPE_APDO 3
+
+#define PDO_TYPE_SHIFT 30
+#define PDO_TYPE_MASK 0x3
+
+#define PDO_TYPE(t) ((t) << PDO_TYPE_SHIFT)
+
+#define PDO_VOLT_MASK 0x3ff
+#define PDO_CURR_MASK 0x3ff
+#define PDO_PWR_MASK 0x3ff
+
+#define PDO_FIXED_DUAL_ROLE (1 << 29) /* Power role swap supported */
+#define PDO_FIXED_SUSPEND (1 << 28) /* USB Suspend supported (Source) */
+#define PDO_FIXED_HIGHER_CAP (1 << 28) /* Requires more than vSafe5V (Sink) */
+#define PDO_FIXED_EXTPOWER (1 << 27) /* Externally powered */
+#define PDO_FIXED_USB_COMM (1 << 26) /* USB communications capable */
+#define PDO_FIXED_DATA_SWAP (1 << 25) /* Data role swap supported */
+#define PDO_FIXED_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_FIXED_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_FIXED_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_FIXED_VOLT_SHIFT)
+#define PDO_FIXED_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_FIXED_CURR_SHIFT)
+
+#define PDO_FIXED(mv, ma, flags) \
+ (PDO_TYPE(PDO_TYPE_FIXED) | (flags) | \
+ PDO_FIXED_VOLT(mv) | PDO_FIXED_CURR(ma))
+
+#define VSAFE5V 5000 /* mv units */
+
+#define PDO_BATT_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_BATT_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */
+
+#define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MIN_VOLT_SHIFT)
+#define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MAX_VOLT_SHIFT)
+#define PDO_BATT_MAX_POWER(mw) ((((mw) / 250) & PDO_PWR_MASK) << PDO_BATT_MAX_PWR_SHIFT)
+
+#define PDO_BATT(min_mv, max_mv, max_mw) \
+ (PDO_TYPE(PDO_TYPE_BATT) | PDO_BATT_MIN_VOLT(min_mv) | \
+ PDO_BATT_MAX_VOLT(max_mv) | PDO_BATT_MAX_POWER(max_mw))
+
+#define PDO_VAR_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_VAR_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_VAR_MAX_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MIN_VOLT_SHIFT)
+#define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MAX_VOLT_SHIFT)
+#define PDO_VAR_MAX_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_VAR_MAX_CURR_SHIFT)
+
+#define PDO_VAR(min_mv, max_mv, max_ma) \
+ (PDO_TYPE(PDO_TYPE_VAR) | PDO_VAR_MIN_VOLT(min_mv) | \
+ PDO_VAR_MAX_VOLT(max_mv) | PDO_VAR_MAX_CURR(max_ma))
+
+ #endif /* __DT_POWER_DELIVERY_H */
};
+#define TYPEC_ANY_MODE 0x7
+/**
+ * struct typec_device_id - USB Type-C alternate mode identifiers
+ * @svid: Standard or Vendor ID
+ * @mode: Mode index
+ * @driver_data: Driver specific data
+ */
+struct typec_device_id {
+ __u16 svid;
+ __u8 mode;
+ kernel_ulong_t driver_data;
+};
#endif /* LINUX_MOD_DEVICETABLE_H */
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
+ POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_CALIBRATE,
POWER_SUPPLY_TYPE_USB_PD_DRP, /* PD Dual Role Port */
};
+enum power_supply_usb_type {
+ POWER_SUPPLY_USB_TYPE_UNKNOWN = 0,
+ POWER_SUPPLY_USB_TYPE_SDP, /* Standard Downstream Port */
+ POWER_SUPPLY_USB_TYPE_DCP, /* Dedicated Charging Port */
+ POWER_SUPPLY_USB_TYPE_CDP, /* Charging Downstream Port */
+ POWER_SUPPLY_USB_TYPE_ACA, /* Accessory Charger Adapters */
+ POWER_SUPPLY_USB_TYPE_C, /* Type C Port */
+ POWER_SUPPLY_USB_TYPE_PD, /* Power Delivery Port */
+ POWER_SUPPLY_USB_TYPE_PD_DRP, /* PD Dual Role Port */
+ POWER_SUPPLY_USB_TYPE_PD_PPS, /* PD Programmable Power Supply */
+ POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID, /* Apple Charging Method */
+};
enum power_supply_notifier_events {
PSY_EVENT_PROP_CHANGED,
};
/* Run-time specific power supply configuration */
struct power_supply_config {
struct device_node *of_node;
+ struct fwnode_handle *fwnode;
+
/* Driver private data */
void *drv_data;
struct power_supply_desc {
const char *name;
enum power_supply_type type;
+ enum power_supply_usb_type *usb_types;
+ size_t num_usb_types;
enum power_supply_property *properties;
size_t num_properties;
--- /dev/null
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_USB_PD_H
+#define __LINUX_USB_PD_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/usb/typec.h>
+
+/* USB PD Messages */
+enum pd_ctrl_msg_type {
+ /* 0 Reserved */
+ PD_CTRL_GOOD_CRC = 1,
+ PD_CTRL_GOTO_MIN = 2,
+ PD_CTRL_ACCEPT = 3,
+ PD_CTRL_REJECT = 4,
+ PD_CTRL_PING = 5,
+ PD_CTRL_PS_RDY = 6,
+ PD_CTRL_GET_SOURCE_CAP = 7,
+ PD_CTRL_GET_SINK_CAP = 8,
+ PD_CTRL_DR_SWAP = 9,
+ PD_CTRL_PR_SWAP = 10,
+ PD_CTRL_VCONN_SWAP = 11,
+ PD_CTRL_WAIT = 12,
+ PD_CTRL_SOFT_RESET = 13,
+ /* 14-15 Reserved */
+ PD_CTRL_NOT_SUPP = 16,
+ PD_CTRL_GET_SOURCE_CAP_EXT = 17,
+ PD_CTRL_GET_STATUS = 18,
+ PD_CTRL_FR_SWAP = 19,
+ PD_CTRL_GET_PPS_STATUS = 20,
+ PD_CTRL_GET_COUNTRY_CODES = 21,
+ /* 22-31 Reserved */
+};
+
+enum pd_data_msg_type {
+ /* 0 Reserved */
+ PD_DATA_SOURCE_CAP = 1,
+ PD_DATA_REQUEST = 2,
+ PD_DATA_BIST = 3,
+ PD_DATA_SINK_CAP = 4,
+ PD_DATA_BATT_STATUS = 5,
+ PD_DATA_ALERT = 6,
+ PD_DATA_GET_COUNTRY_INFO = 7,
+ /* 8-14 Reserved */
+ PD_DATA_VENDOR_DEF = 15,
+ /* 16-31 Reserved */
+};
+
+enum pd_ext_msg_type {
+ /* 0 Reserved */
+ PD_EXT_SOURCE_CAP_EXT = 1,
+ PD_EXT_STATUS = 2,
+ PD_EXT_GET_BATT_CAP = 3,
+ PD_EXT_GET_BATT_STATUS = 4,
+ PD_EXT_BATT_CAP = 5,
+ PD_EXT_GET_MANUFACTURER_INFO = 6,
+ PD_EXT_MANUFACTURER_INFO = 7,
+ PD_EXT_SECURITY_REQUEST = 8,
+ PD_EXT_SECURITY_RESPONSE = 9,
+ PD_EXT_FW_UPDATE_REQUEST = 10,
+ PD_EXT_FW_UPDATE_RESPONSE = 11,
+ PD_EXT_PPS_STATUS = 12,
+ PD_EXT_COUNTRY_INFO = 13,
+ PD_EXT_COUNTRY_CODES = 14,
+ /* 15-31 Reserved */
+};
+
+#define PD_REV10 0x0
+#define PD_REV20 0x1
+#define PD_REV30 0x2
+#define PD_MAX_REV PD_REV30
+
+#define PD_HEADER_EXT_HDR BIT(15)
+#define PD_HEADER_CNT_SHIFT 12
+#define PD_HEADER_CNT_MASK 0x7
+#define PD_HEADER_ID_SHIFT 9
+#define PD_HEADER_ID_MASK 0x7
+#define PD_HEADER_PWR_ROLE BIT(8)
+#define PD_HEADER_REV_SHIFT 6
+#define PD_HEADER_REV_MASK 0x3
+#define PD_HEADER_DATA_ROLE BIT(5)
+#define PD_HEADER_TYPE_SHIFT 0
+#define PD_HEADER_TYPE_MASK 0x1f
+
+#define PD_HEADER(type, pwr, data, rev, id, cnt, ext_hdr) \
+ ((((type) & PD_HEADER_TYPE_MASK) << PD_HEADER_TYPE_SHIFT) | \
+ ((pwr) == TYPEC_SOURCE ? PD_HEADER_PWR_ROLE : 0) | \
+ ((data) == TYPEC_HOST ? PD_HEADER_DATA_ROLE : 0) | \
+ (rev << PD_HEADER_REV_SHIFT) | \
+ (((id) & PD_HEADER_ID_MASK) << PD_HEADER_ID_SHIFT) | \
+ (((cnt) & PD_HEADER_CNT_MASK) << PD_HEADER_CNT_SHIFT) | \
+ ((ext_hdr) ? PD_HEADER_EXT_HDR : 0))
+
+#define PD_HEADER_LE(type, pwr, data, rev, id, cnt) \
+ cpu_to_le16(PD_HEADER((type), (pwr), (data), (rev), (id), (cnt), (0)))
+
+static inline unsigned int pd_header_cnt(u16 header)
+{
+ return (header >> PD_HEADER_CNT_SHIFT) & PD_HEADER_CNT_MASK;
+}
+
+static inline unsigned int pd_header_cnt_le(__le16 header)
+{
+ return pd_header_cnt(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_type(u16 header)
+{
+ return (header >> PD_HEADER_TYPE_SHIFT) & PD_HEADER_TYPE_MASK;
+}
+
+static inline unsigned int pd_header_type_le(__le16 header)
+{
+ return pd_header_type(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_msgid(u16 header)
+{
+ return (header >> PD_HEADER_ID_SHIFT) & PD_HEADER_ID_MASK;
+}
+
+static inline unsigned int pd_header_msgid_le(__le16 header)
+{
+ return pd_header_msgid(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_rev(u16 header)
+{
+ return (header >> PD_HEADER_REV_SHIFT) & PD_HEADER_REV_MASK;
+}
+
+static inline unsigned int pd_header_rev_le(__le16 header)
+{
+ return pd_header_rev(le16_to_cpu(header));
+}
+
+#define PD_EXT_HDR_CHUNKED BIT(15)
+#define PD_EXT_HDR_CHUNK_NUM_SHIFT 11
+#define PD_EXT_HDR_CHUNK_NUM_MASK 0xf
+#define PD_EXT_HDR_REQ_CHUNK BIT(10)
+#define PD_EXT_HDR_DATA_SIZE_SHIFT 0
+#define PD_EXT_HDR_DATA_SIZE_MASK 0x1ff
+
+#define PD_EXT_HDR(data_size, req_chunk, chunk_num, chunked) \
+ ((((data_size) & PD_EXT_HDR_DATA_SIZE_MASK) << PD_EXT_HDR_DATA_SIZE_SHIFT) | \
+ ((req_chunk) ? PD_EXT_HDR_REQ_CHUNK : 0) | \
+ (((chunk_num) & PD_EXT_HDR_CHUNK_NUM_MASK) << PD_EXT_HDR_CHUNK_NUM_SHIFT) | \
+ ((chunked) ? PD_EXT_HDR_CHUNKED : 0))
+
+#define PD_EXT_HDR_LE(data_size, req_chunk, chunk_num, chunked) \
+ cpu_to_le16(PD_EXT_HDR((data_size), (req_chunk), (chunk_num), (chunked)))
+
+static inline unsigned int pd_ext_header_chunk_num(u16 ext_header)
+{
+ return (ext_header >> PD_EXT_HDR_CHUNK_NUM_SHIFT) &
+ PD_EXT_HDR_CHUNK_NUM_MASK;
+}
+
+static inline unsigned int pd_ext_header_data_size(u16 ext_header)
+{
+ return (ext_header >> PD_EXT_HDR_DATA_SIZE_SHIFT) &
+ PD_EXT_HDR_DATA_SIZE_MASK;
+}
+
+static inline unsigned int pd_ext_header_data_size_le(__le16 ext_header)
+{
+ return pd_ext_header_data_size(le16_to_cpu(ext_header));
+}
+
+#define PD_MAX_PAYLOAD 7
+#define PD_EXT_MAX_CHUNK_DATA 26
+
+/**
+ * struct pd_chunked_ext_message_data - PD chunked extended message data as
+ * seen on wire
+ * @header: PD extended message header
+ * @data: PD extended message data
+ */
+struct pd_chunked_ext_message_data {
+ __le16 header;
+ u8 data[PD_EXT_MAX_CHUNK_DATA];
+} __packed;
+
+/**
+ * struct pd_message - PD message as seen on wire
+ * @header: PD message header
+ * @payload: PD message payload
+ * @ext_msg: PD message chunked extended message data
+ */
+struct pd_message {
+ __le16 header;
+ union {
+ __le32 payload[PD_MAX_PAYLOAD];
+ struct pd_chunked_ext_message_data ext_msg;
+ };
+} __packed;
+
+/* PDO: Power Data Object */
+#define PDO_MAX_OBJECTS 7
+
+enum pd_pdo_type {
+ PDO_TYPE_FIXED = 0,
+ PDO_TYPE_BATT = 1,
+ PDO_TYPE_VAR = 2,
+ PDO_TYPE_APDO = 3,
+};
+
+#define PDO_TYPE_SHIFT 30
+#define PDO_TYPE_MASK 0x3
+
+#define PDO_TYPE(t) ((t) << PDO_TYPE_SHIFT)
+
+#define PDO_VOLT_MASK 0x3ff
+#define PDO_CURR_MASK 0x3ff
+#define PDO_PWR_MASK 0x3ff
+
+#define PDO_FIXED_DUAL_ROLE BIT(29) /* Power role swap supported */
+#define PDO_FIXED_SUSPEND BIT(28) /* USB Suspend supported (Source) */
+#define PDO_FIXED_HIGHER_CAP BIT(28) /* Requires more than vSafe5V (Sink) */
+#define PDO_FIXED_EXTPOWER BIT(27) /* Externally powered */
+#define PDO_FIXED_USB_COMM BIT(26) /* USB communications capable */
+#define PDO_FIXED_DATA_SWAP BIT(25) /* Data role swap supported */
+#define PDO_FIXED_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_FIXED_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_FIXED_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_FIXED_VOLT_SHIFT)
+#define PDO_FIXED_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_FIXED_CURR_SHIFT)
+
+#define PDO_FIXED(mv, ma, flags) \
+ (PDO_TYPE(PDO_TYPE_FIXED) | (flags) | \
+ PDO_FIXED_VOLT(mv) | PDO_FIXED_CURR(ma))
+
+#define VSAFE5V 5000 /* mv units */
+
+#define PDO_BATT_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_BATT_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */
+
+#define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MIN_VOLT_SHIFT)
+#define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MAX_VOLT_SHIFT)
+#define PDO_BATT_MAX_POWER(mw) ((((mw) / 250) & PDO_PWR_MASK) << PDO_BATT_MAX_PWR_SHIFT)
+
+#define PDO_BATT(min_mv, max_mv, max_mw) \
+ (PDO_TYPE(PDO_TYPE_BATT) | PDO_BATT_MIN_VOLT(min_mv) | \
+ PDO_BATT_MAX_VOLT(max_mv) | PDO_BATT_MAX_POWER(max_mw))
+
+#define PDO_VAR_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_VAR_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_VAR_MAX_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MIN_VOLT_SHIFT)
+#define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MAX_VOLT_SHIFT)
+#define PDO_VAR_MAX_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_VAR_MAX_CURR_SHIFT)
+
+#define PDO_VAR(min_mv, max_mv, max_ma) \
+ (PDO_TYPE(PDO_TYPE_VAR) | PDO_VAR_MIN_VOLT(min_mv) | \
+ PDO_VAR_MAX_VOLT(max_mv) | PDO_VAR_MAX_CURR(max_ma))
+
+enum pd_apdo_type {
+ APDO_TYPE_PPS = 0,
+};
+
+#define PDO_APDO_TYPE_SHIFT 28 /* Only valid value currently is 0x0 - PPS */
+#define PDO_APDO_TYPE_MASK 0x3
+
+#define PDO_APDO_TYPE(t) ((t) << PDO_APDO_TYPE_SHIFT)
+
+#define PDO_PPS_APDO_MAX_VOLT_SHIFT 17 /* 100mV units */
+#define PDO_PPS_APDO_MIN_VOLT_SHIFT 8 /* 100mV units */
+#define PDO_PPS_APDO_MAX_CURR_SHIFT 0 /* 50mA units */
+
+#define PDO_PPS_APDO_VOLT_MASK 0xff
+#define PDO_PPS_APDO_CURR_MASK 0x7f
+
+#define PDO_PPS_APDO_MIN_VOLT(mv) \
+ ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MIN_VOLT_SHIFT)
+#define PDO_PPS_APDO_MAX_VOLT(mv) \
+ ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MAX_VOLT_SHIFT)
+#define PDO_PPS_APDO_MAX_CURR(ma) \
+ ((((ma) / 50) & PDO_PPS_APDO_CURR_MASK) << PDO_PPS_APDO_MAX_CURR_SHIFT)
+
+#define PDO_PPS_APDO(min_mv, max_mv, max_ma) \
+ (PDO_TYPE(PDO_TYPE_APDO) | PDO_APDO_TYPE(APDO_TYPE_PPS) | \
+ PDO_PPS_APDO_MIN_VOLT(min_mv) | PDO_PPS_APDO_MAX_VOLT(max_mv) | \
+ PDO_PPS_APDO_MAX_CURR(max_ma))
+
+static inline enum pd_pdo_type pdo_type(u32 pdo)
+{
+ return (pdo >> PDO_TYPE_SHIFT) & PDO_TYPE_MASK;
+}
+
+static inline unsigned int pdo_fixed_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_FIXED_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_min_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MIN_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_max_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MAX_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_max_current(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MAX_CURR_SHIFT) & PDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int pdo_max_power(u32 pdo)
+{
+ return ((pdo >> PDO_BATT_MAX_PWR_SHIFT) & PDO_PWR_MASK) * 250;
+}
+
+static inline enum pd_apdo_type pdo_apdo_type(u32 pdo)
+{
+ return (pdo >> PDO_APDO_TYPE_SHIFT) & PDO_APDO_TYPE_MASK;
+}
+
+static inline unsigned int pdo_pps_apdo_min_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MIN_VOLT_SHIFT) &
+ PDO_PPS_APDO_VOLT_MASK) * 100;
+}
+
+static inline unsigned int pdo_pps_apdo_max_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MAX_VOLT_SHIFT) &
+ PDO_PPS_APDO_VOLT_MASK) * 100;
+}
+
+static inline unsigned int pdo_pps_apdo_max_current(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MAX_CURR_SHIFT) &
+ PDO_PPS_APDO_CURR_MASK) * 50;
+}
+
+/* RDO: Request Data Object */
+#define RDO_OBJ_POS_SHIFT 28
+#define RDO_OBJ_POS_MASK 0x7
+#define RDO_GIVE_BACK BIT(27) /* Supports reduced operating current */
+#define RDO_CAP_MISMATCH BIT(26) /* Not satisfied by source caps */
+#define RDO_USB_COMM BIT(25) /* USB communications capable */
+#define RDO_NO_SUSPEND BIT(24) /* USB Suspend not supported */
+
+#define RDO_PWR_MASK 0x3ff
+#define RDO_CURR_MASK 0x3ff
+
+#define RDO_FIXED_OP_CURR_SHIFT 10
+#define RDO_FIXED_MAX_CURR_SHIFT 0
+
+#define RDO_OBJ(idx) (((idx) & RDO_OBJ_POS_MASK) << RDO_OBJ_POS_SHIFT)
+
+#define PDO_FIXED_OP_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_OP_CURR_SHIFT)
+#define PDO_FIXED_MAX_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_MAX_CURR_SHIFT)
+
+#define RDO_FIXED(idx, op_ma, max_ma, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ PDO_FIXED_OP_CURR(op_ma) | PDO_FIXED_MAX_CURR(max_ma))
+
+#define RDO_BATT_OP_PWR_SHIFT 10 /* 250mW units */
+#define RDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */
+
+#define RDO_BATT_OP_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_OP_PWR_SHIFT)
+#define RDO_BATT_MAX_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_MAX_PWR_SHIFT)
+
+#define RDO_BATT(idx, op_mw, max_mw, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ RDO_BATT_OP_PWR(op_mw) | RDO_BATT_MAX_PWR(max_mw))
+
+#define RDO_PROG_VOLT_MASK 0x7ff
+#define RDO_PROG_CURR_MASK 0x7f
+
+#define RDO_PROG_VOLT_SHIFT 9
+#define RDO_PROG_CURR_SHIFT 0
+
+#define RDO_PROG_VOLT_MV_STEP 20
+#define RDO_PROG_CURR_MA_STEP 50
+
+#define PDO_PROG_OUT_VOLT(mv) \
+ ((((mv) / RDO_PROG_VOLT_MV_STEP) & RDO_PROG_VOLT_MASK) << RDO_PROG_VOLT_SHIFT)
+#define PDO_PROG_OP_CURR(ma) \
+ ((((ma) / RDO_PROG_CURR_MA_STEP) & RDO_PROG_CURR_MASK) << RDO_PROG_CURR_SHIFT)
+
+#define RDO_PROG(idx, out_mv, op_ma, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ PDO_PROG_OUT_VOLT(out_mv) | PDO_PROG_OP_CURR(op_ma))
+
+static inline unsigned int rdo_index(u32 rdo)
+{
+ return (rdo >> RDO_OBJ_POS_SHIFT) & RDO_OBJ_POS_MASK;
+}
+
+static inline unsigned int rdo_op_current(u32 rdo)
+{
+ return ((rdo >> RDO_FIXED_OP_CURR_SHIFT) & RDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int rdo_max_current(u32 rdo)
+{
+ return ((rdo >> RDO_FIXED_MAX_CURR_SHIFT) &
+ RDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int rdo_op_power(u32 rdo)
+{
+ return ((rdo >> RDO_BATT_OP_PWR_SHIFT) & RDO_PWR_MASK) * 250;
+}
+
+static inline unsigned int rdo_max_power(u32 rdo)
+{
+ return ((rdo >> RDO_BATT_MAX_PWR_SHIFT) & RDO_PWR_MASK) * 250;
+}
+
+/* USB PD timers and counters */
+#define PD_T_NO_RESPONSE 5000 /* 4.5 - 5.5 seconds */
+#define PD_T_DB_DETECT 10000 /* 10 - 15 seconds */
+#define PD_T_SEND_SOURCE_CAP 150 /* 100 - 200 ms */
+#define PD_T_SENDER_RESPONSE 60 /* 24 - 30 ms, relaxed */
+#define PD_T_SOURCE_ACTIVITY 45
+#define PD_T_SINK_ACTIVITY 135
+#define PD_T_SINK_WAIT_CAP 240
+#define PD_T_PS_TRANSITION 500
+#define PD_T_SRC_TRANSITION 35
+#define PD_T_DRP_SNK 40
+#define PD_T_DRP_SRC 30
+#define PD_T_PS_SOURCE_OFF 920
+#define PD_T_PS_SOURCE_ON 480
+#define PD_T_PS_HARD_RESET 30
+#define PD_T_SRC_RECOVER 760
+#define PD_T_SRC_RECOVER_MAX 1000
+#define PD_T_SRC_TURN_ON 275
+#define PD_T_SAFE_0V 650
+#define PD_T_VCONN_SOURCE_ON 100
+#define PD_T_SINK_REQUEST 100 /* 100 ms minimum */
+#define PD_T_ERROR_RECOVERY 100 /* minimum 25 is insufficient */
+#define PD_T_SRCSWAPSTDBY 625 /* Maximum of 650ms */
+#define PD_T_NEWSRC 250 /* Maximum of 275ms */
+
+#define PD_T_DRP_TRY 100 /* 75 - 150 ms */
+#define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */
+
+#define PD_T_CC_DEBOUNCE 200 /* 100 - 200 ms */
+#define PD_T_PD_DEBOUNCE 20 /* 10 - 20 ms */
+
+#define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP)
+#define PD_N_HARD_RESET_COUNT 2
+
+#endif /* __LINUX_USB_PD_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017 Dialog Semiconductor
+ *
+ * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
+ */
+
+#ifndef __LINUX_USB_PD_ADO_H
+#define __LINUX_USB_PD_ADO_H
+
+/* ADO : Alert Data Object */
+#define USB_PD_ADO_TYPE_SHIFT 24
+#define USB_PD_ADO_TYPE_MASK 0xff
+#define USB_PD_ADO_FIXED_BATT_SHIFT 20
+#define USB_PD_ADO_FIXED_BATT_MASK 0xf
+#define USB_PD_ADO_HOT_SWAP_BATT_SHIFT 16
+#define USB_PD_ADO_HOT_SWAP_BATT_MASK 0xf
+
+#define USB_PD_ADO_TYPE_BATT_STATUS_CHANGE BIT(1)
+#define USB_PD_ADO_TYPE_OCP BIT(2)
+#define USB_PD_ADO_TYPE_OTP BIT(3)
+#define USB_PD_ADO_TYPE_OP_COND_CHANGE BIT(4)
+#define USB_PD_ADO_TYPE_SRC_INPUT_CHANGE BIT(5)
+#define USB_PD_ADO_TYPE_OVP BIT(6)
+
+static inline unsigned int usb_pd_ado_type(u32 ado)
+{
+ return (ado >> USB_PD_ADO_TYPE_SHIFT) & USB_PD_ADO_TYPE_MASK;
+}
+
+static inline unsigned int usb_pd_ado_fixed_batt(u32 ado)
+{
+ return (ado >> USB_PD_ADO_FIXED_BATT_SHIFT) &
+ USB_PD_ADO_FIXED_BATT_MASK;
+}
+
+static inline unsigned int usb_pd_ado_hot_swap_batt(u32 ado)
+{
+ return (ado >> USB_PD_ADO_HOT_SWAP_BATT_SHIFT) &
+ USB_PD_ADO_HOT_SWAP_BATT_MASK;
+}
+#endif /* __LINUX_USB_PD_ADO_H */
--- /dev/null
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_USB_PD_BDO_H
+#define __LINUX_USB_PD_BDO_H
+
+/* BDO : BIST Data Object */
+#define BDO_MODE_RECV (0 << 28)
+#define BDO_MODE_TRANSMIT (1 << 28)
+#define BDO_MODE_COUNTERS (2 << 28)
+#define BDO_MODE_CARRIER0 (3 << 28)
+#define BDO_MODE_CARRIER1 (4 << 28)
+#define BDO_MODE_CARRIER2 (5 << 28)
+#define BDO_MODE_CARRIER3 (6 << 28)
+#define BDO_MODE_EYE (7 << 28)
+#define BDO_MODE_TESTDATA (8 << 28)
+
+#define BDO_MODE_MASK(mode) ((mode) & 0xf0000000)
+
+#endif
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017 Dialog Semiconductor
+ *
+ * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
+ */
+
+#ifndef __LINUX_USB_PD_EXT_SDB_H
+#define __LINUX_USB_PD_EXT_SDB_H
+
+/* SDB : Status Data Block */
+enum usb_pd_ext_sdb_fields {
+ USB_PD_EXT_SDB_INTERNAL_TEMP = 0,
+ USB_PD_EXT_SDB_PRESENT_INPUT,
+ USB_PD_EXT_SDB_PRESENT_BATT_INPUT,
+ USB_PD_EXT_SDB_EVENT_FLAGS,
+ USB_PD_EXT_SDB_TEMP_STATUS,
+ USB_PD_EXT_SDB_DATA_SIZE,
+};
+
+/* Event Flags */
+#define USB_PD_EXT_SDB_EVENT_OCP BIT(1)
+#define USB_PD_EXT_SDB_EVENT_OTP BIT(2)
+#define USB_PD_EXT_SDB_EVENT_OVP BIT(3)
+#define USB_PD_EXT_SDB_EVENT_CF_CV_MODE BIT(4)
+
+#define USB_PD_EXT_SDB_PPS_EVENTS (USB_PD_EXT_SDB_EVENT_OCP | \
+ USB_PD_EXT_SDB_EVENT_OTP | \
+ USB_PD_EXT_SDB_EVENT_OVP)
+
+#endif /* __LINUX_USB_PD_EXT_SDB_H */
--- /dev/null
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_USB_PD_VDO_H
+#define __LINUX_USB_PD_VDO_H
+
+#include "pd.h"
+
+/*
+ * VDO : Vendor Defined Message Object
+ * VDM object is minimum of VDM header + 6 additional data objects.
+ */
+
+#define VDO_MAX_OBJECTS 6
+#define VDO_MAX_SIZE (VDO_MAX_OBJECTS + 1)
+
+/*
+ * VDM header
+ * ----------
+ * <31:16> :: SVID
+ * <15> :: VDM type ( 1b == structured, 0b == unstructured )
+ * <14:13> :: Structured VDM version (can only be 00 == 1.0 currently)
+ * <12:11> :: reserved
+ * <10:8> :: object position (1-7 valid ... used for enter/exit mode only)
+ * <7:6> :: command type (SVDM only?)
+ * <5> :: reserved (SVDM), command type (UVDM)
+ * <4:0> :: command
+ */
+#define VDO(vid, type, custom) \
+ (((vid) << 16) | \
+ ((type) << 15) | \
+ ((custom) & 0x7FFF))
+
+#define VDO_SVDM_TYPE (1 << 15)
+#define VDO_SVDM_VERS(x) ((x) << 13)
+#define VDO_OPOS(x) ((x) << 8)
+#define VDO_CMDT(x) ((x) << 6)
+#define VDO_OPOS_MASK VDO_OPOS(0x7)
+#define VDO_CMDT_MASK VDO_CMDT(0x3)
+
+#define CMDT_INIT 0
+#define CMDT_RSP_ACK 1
+#define CMDT_RSP_NAK 2
+#define CMDT_RSP_BUSY 3
+
+/* reserved for SVDM ... for Google UVDM */
+#define VDO_SRC_INITIATOR (0 << 5)
+#define VDO_SRC_RESPONDER (1 << 5)
+
+#define CMD_DISCOVER_IDENT 1
+#define CMD_DISCOVER_SVID 2
+#define CMD_DISCOVER_MODES 3
+#define CMD_ENTER_MODE 4
+#define CMD_EXIT_MODE 5
+#define CMD_ATTENTION 6
+
+#define VDO_CMD_VENDOR(x) (((0x10 + (x)) & 0x1f))
+
+/* ChromeOS specific commands */
+#define VDO_CMD_VERSION VDO_CMD_VENDOR(0)
+#define VDO_CMD_SEND_INFO VDO_CMD_VENDOR(1)
+#define VDO_CMD_READ_INFO VDO_CMD_VENDOR(2)
+#define VDO_CMD_REBOOT VDO_CMD_VENDOR(5)
+#define VDO_CMD_FLASH_ERASE VDO_CMD_VENDOR(6)
+#define VDO_CMD_FLASH_WRITE VDO_CMD_VENDOR(7)
+#define VDO_CMD_ERASE_SIG VDO_CMD_VENDOR(8)
+#define VDO_CMD_PING_ENABLE VDO_CMD_VENDOR(10)
+#define VDO_CMD_CURRENT VDO_CMD_VENDOR(11)
+#define VDO_CMD_FLIP VDO_CMD_VENDOR(12)
+#define VDO_CMD_GET_LOG VDO_CMD_VENDOR(13)
+#define VDO_CMD_CCD_EN VDO_CMD_VENDOR(14)
+
+#define PD_VDO_VID(vdo) ((vdo) >> 16)
+#define PD_VDO_SVDM(vdo) (((vdo) >> 15) & 1)
+#define PD_VDO_OPOS(vdo) (((vdo) >> 8) & 0x7)
+#define PD_VDO_CMD(vdo) ((vdo) & 0x1f)
+#define PD_VDO_CMDT(vdo) (((vdo) >> 6) & 0x3)
+
+/*
+ * SVDM Identity request -> response
+ *
+ * Request is simply properly formatted SVDM header
+ *
+ * Response is 4 data objects:
+ * [0] :: SVDM header
+ * [1] :: Identitiy header
+ * [2] :: Cert Stat VDO
+ * [3] :: (Product | Cable) VDO
+ * [4] :: AMA VDO
+ *
+ */
+#define VDO_INDEX_HDR 0
+#define VDO_INDEX_IDH 1
+#define VDO_INDEX_CSTAT 2
+#define VDO_INDEX_CABLE 3
+#define VDO_INDEX_PRODUCT 3
+#define VDO_INDEX_AMA 4
+
+/*
+ * SVDM Identity Header
+ * --------------------
+ * <31> :: data capable as a USB host
+ * <30> :: data capable as a USB device
+ * <29:27> :: product type
+ * <26> :: modal operation supported (1b == yes)
+ * <25:16> :: Reserved, Shall be set to zero
+ * <15:0> :: USB-IF assigned VID for this cable vendor
+ */
+#define IDH_PTYPE_UNDEF 0
+#define IDH_PTYPE_HUB 1
+#define IDH_PTYPE_PERIPH 2
+#define IDH_PTYPE_PCABLE 3
+#define IDH_PTYPE_ACABLE 4
+#define IDH_PTYPE_AMA 5
+
+#define VDO_IDH(usbh, usbd, ptype, is_modal, vid) \
+ ((usbh) << 31 | (usbd) << 30 | ((ptype) & 0x7) << 27 \
+ | (is_modal) << 26 | ((vid) & 0xffff))
+
+#define PD_IDH_PTYPE(vdo) (((vdo) >> 27) & 0x7)
+#define PD_IDH_VID(vdo) ((vdo) & 0xffff)
+#define PD_IDH_MODAL_SUPP(vdo) ((vdo) & (1 << 26))
+
+/*
+ * Cert Stat VDO
+ * -------------
+ * <31:0> : USB-IF assigned XID for this cable
+ */
+#define PD_CSTAT_XID(vdo) (vdo)
+
+/*
+ * Product VDO
+ * -----------
+ * <31:16> : USB Product ID
+ * <15:0> : USB bcdDevice
+ */
+#define VDO_PRODUCT(pid, bcd) (((pid) & 0xffff) << 16 | ((bcd) & 0xffff))
+#define PD_PRODUCT_PID(vdo) (((vdo) >> 16) & 0xffff)
+
+/*
+ * Cable VDO
+ * ---------
+ * <31:28> :: Cable HW version
+ * <27:24> :: Cable FW version
+ * <23:20> :: Reserved, Shall be set to zero
+ * <19:18> :: type-C to Type-A/B/C (00b == A, 01 == B, 10 == C)
+ * <17> :: Type-C to Plug/Receptacle (0b == plug, 1b == receptacle)
+ * <16:13> :: cable latency (0001 == <10ns(~1m length))
+ * <12:11> :: cable termination type (11b == both ends active VCONN req)
+ * <10> :: SSTX1 Directionality support (0b == fixed, 1b == cfgable)
+ * <9> :: SSTX2 Directionality support
+ * <8> :: SSRX1 Directionality support
+ * <7> :: SSRX2 Directionality support
+ * <6:5> :: Vbus current handling capability
+ * <4> :: Vbus through cable (0b == no, 1b == yes)
+ * <3> :: SOP" controller present? (0b == no, 1b == yes)
+ * <2:0> :: USB SS Signaling support
+ */
+#define CABLE_ATYPE 0
+#define CABLE_BTYPE 1
+#define CABLE_CTYPE 2
+#define CABLE_PLUG 0
+#define CABLE_RECEPTACLE 1
+#define CABLE_CURR_1A5 0
+#define CABLE_CURR_3A 1
+#define CABLE_CURR_5A 2
+#define CABLE_USBSS_U2_ONLY 0
+#define CABLE_USBSS_U31_GEN1 1
+#define CABLE_USBSS_U31_GEN2 2
+#define VDO_CABLE(hw, fw, cbl, gdr, lat, term, tx1d, tx2d, rx1d, rx2d, cur,\
+ vps, sopp, usbss) \
+ (((hw) & 0x7) << 28 | ((fw) & 0x7) << 24 | ((cbl) & 0x3) << 18 \
+ | (gdr) << 17 | ((lat) & 0x7) << 13 | ((term) & 0x3) << 11 \
+ | (tx1d) << 10 | (tx2d) << 9 | (rx1d) << 8 | (rx2d) << 7 \
+ | ((cur) & 0x3) << 5 | (vps) << 4 | (sopp) << 3 \
+ | ((usbss) & 0x7))
+
+/*
+ * AMA VDO
+ * ---------
+ * <31:28> :: Cable HW version
+ * <27:24> :: Cable FW version
+ * <23:12> :: Reserved, Shall be set to zero
+ * <11> :: SSTX1 Directionality support (0b == fixed, 1b == cfgable)
+ * <10> :: SSTX2 Directionality support
+ * <9> :: SSRX1 Directionality support
+ * <8> :: SSRX2 Directionality support
+ * <7:5> :: Vconn power
+ * <4> :: Vconn power required
+ * <3> :: Vbus power required
+ * <2:0> :: USB SS Signaling support
+ */
+#define VDO_AMA(hw, fw, tx1d, tx2d, rx1d, rx2d, vcpwr, vcr, vbr, usbss) \
+ (((hw) & 0x7) << 28 | ((fw) & 0x7) << 24 \
+ | (tx1d) << 11 | (tx2d) << 10 | (rx1d) << 9 | (rx2d) << 8 \
+ | ((vcpwr) & 0x7) << 5 | (vcr) << 4 | (vbr) << 3 \
+ | ((usbss) & 0x7))
+
+#define PD_VDO_AMA_VCONN_REQ(vdo) (((vdo) >> 4) & 1)
+#define PD_VDO_AMA_VBUS_REQ(vdo) (((vdo) >> 3) & 1)
+
+#define AMA_VCONN_PWR_1W 0
+#define AMA_VCONN_PWR_1W5 1
+#define AMA_VCONN_PWR_2W 2
+#define AMA_VCONN_PWR_3W 3
+#define AMA_VCONN_PWR_4W 4
+#define AMA_VCONN_PWR_5W 5
+#define AMA_VCONN_PWR_6W 6
+#define AMA_USBSS_U2_ONLY 0
+#define AMA_USBSS_U31_GEN1 1
+#define AMA_USBSS_U31_GEN2 2
+#define AMA_USBSS_BBONLY 3
+
+/*
+ * SVDM Discover SVIDs request -> response
+ *
+ * Request is properly formatted VDM Header with discover SVIDs command.
+ * Response is a set of SVIDs of all all supported SVIDs with all zero's to
+ * mark the end of SVIDs. If more than 12 SVIDs are supported command SHOULD be
+ * repeated.
+ */
+#define VDO_SVID(svid0, svid1) (((svid0) & 0xffff) << 16 | ((svid1) & 0xffff))
+#define PD_VDO_SVID_SVID0(vdo) ((vdo) >> 16)
+#define PD_VDO_SVID_SVID1(vdo) ((vdo) & 0xffff)
+
+/* USB-IF SIDs */
+#define USB_SID_PD 0xff00 /* power delivery */
+#define USB_SID_DISPLAYPORT 0xff01
+#define USB_SID_MHL 0xff02 /* Mobile High-Definition Link */
+
+/* VDM command timeouts (in ms) */
+
+#define PD_T_VDM_UNSTRUCTURED 500
+#define PD_T_VDM_BUSY 100
+#define PD_T_VDM_WAIT_MODE_E 100
+#define PD_T_VDM_SNDR_RSP 30
+#define PD_T_VDM_E_MODE 25
+#define PD_T_VDM_RCVR_RSP 15
+
+#endif /* __LINUX_USB_PD_VDO_H */
--- /dev/null
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_USB_TCPM_H
+#define __LINUX_USB_TCPM_H
+
+#include <linux/bitops.h>
+#include <linux/usb/typec.h>
+#include "pd.h"
+
+enum typec_cc_status {
+ TYPEC_CC_OPEN,
+ TYPEC_CC_RA,
+ TYPEC_CC_RD,
+ TYPEC_CC_RP_DEF,
+ TYPEC_CC_RP_1_5,
+ TYPEC_CC_RP_3_0,
+};
+
+enum typec_cc_polarity {
+ TYPEC_POLARITY_CC1,
+ TYPEC_POLARITY_CC2,
+};
+
+/* Time to wait for TCPC to complete transmit */
+#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */
+#define PD_ROLE_SWAP_TIMEOUT (MSEC_PER_SEC * 10)
+#define PD_PPS_CTRL_TIMEOUT (MSEC_PER_SEC * 10)
+
+enum tcpm_transmit_status {
+ TCPC_TX_SUCCESS = 0,
+ TCPC_TX_DISCARDED = 1,
+ TCPC_TX_FAILED = 2,
+};
+
+enum tcpm_transmit_type {
+ TCPC_TX_SOP = 0,
+ TCPC_TX_SOP_PRIME = 1,
+ TCPC_TX_SOP_PRIME_PRIME = 2,
+ TCPC_TX_SOP_DEBUG_PRIME = 3,
+ TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4,
+ TCPC_TX_HARD_RESET = 5,
+ TCPC_TX_CABLE_RESET = 6,
+ TCPC_TX_BIST_MODE_2 = 7
+};
+
+/**
+ * struct tcpc_config - Port configuration
+ * @src_pdo: PDO parameters sent to port partner as response to
+ * PD_CTRL_GET_SOURCE_CAP message
+ * @nr_src_pdo: Number of entries in @src_pdo
+ * @snk_pdo: PDO parameters sent to partner as response to
+ * PD_CTRL_GET_SINK_CAP message
+ * @nr_snk_pdo: Number of entries in @snk_pdo
+ * @operating_snk_mw:
+ * Required operating sink power in mW
+ * @type: Port type (TYPEC_PORT_DFP, TYPEC_PORT_UFP, or
+ * TYPEC_PORT_DRP)
+ * @default_role:
+ * Default port role (TYPEC_SINK or TYPEC_SOURCE).
+ * Set to TYPEC_NO_PREFERRED_ROLE if no default role.
+ * @try_role_hw:True if try.{Src,Snk} is implemented in hardware
+ * @alt_modes: List of supported alternate modes
+ */
+struct tcpc_config {
+ const u32 *src_pdo;
+ unsigned int nr_src_pdo;
+
+ const u32 *snk_pdo;
+ unsigned int nr_snk_pdo;
+
+ const u32 *snk_vdo;
+ unsigned int nr_snk_vdo;
+
+ unsigned int operating_snk_mw;
+
+ enum typec_port_type type;
+ enum typec_port_data data;
+ enum typec_role default_role;
+ bool try_role_hw; /* try.{src,snk} implemented in hardware */
+ bool self_powered; /* port belongs to a self powered device */
+
+ const struct typec_altmode_desc *alt_modes;
+};
+
+/* Mux state attributes */
+#define TCPC_MUX_USB_ENABLED BIT(0) /* USB enabled */
+#define TCPC_MUX_DP_ENABLED BIT(1) /* DP enabled */
+#define TCPC_MUX_POLARITY_INVERTED BIT(2) /* Polarity inverted */
+
+/**
+ * struct tcpc_dev - Port configuration and callback functions
+ * @config: Pointer to port configuration
+ * @fwnode: Pointer to port fwnode
+ * @get_vbus: Called to read current VBUS state
+ * @get_current_limit:
+ * Optional; called by the tcpm core when configured as a snk
+ * and cc=Rp-def. This allows the tcpm to provide a fallback
+ * current-limit detection method for the cc=Rp-def case.
+ * For example, some tcpcs may include BC1.2 charger detection
+ * and use that in this case.
+ * @set_cc: Called to set value of CC pins
+ * @get_cc: Called to read current CC pin values
+ * @set_bist:
+ * Called to set hardware bist mode
+ * @set_polarity:
+ * Called to set polarity
+ * @set_vconn: Called to enable or disable VCONN
+ * @set_vbus: Called to enable or disable VBUS
+ * @set_current_limit:
+ * Optional; called to set current limit as negotiated
+ * with partner.
+ * @set_pd_rx: Called to enable or disable reception of PD messages
+ * @set_roles: Called to set power and data roles
+ * @start_drp_toggling:
+ * Optional; if supported by hardware, called to start DRP
+ * toggling. DRP toggling is stopped automatically if
+ * a connection is established.
+ * @try_role: Optional; called to set a preferred role
+ * @pd_transmit:Called to transmit PD message
+ * @mux: Pointer to multiplexer data
+ */
+struct tcpc_dev {
+ const struct tcpc_config *config;
+ struct fwnode_handle *fwnode;
+
+ int (*init)(struct tcpc_dev *dev);
+ int (*get_vbus)(struct tcpc_dev *dev);
+ int (*get_current_limit)(struct tcpc_dev *dev);
+ int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc);
+ int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1,
+ enum typec_cc_status *cc2);
+ int (*set_bist)(struct tcpc_dev *dev, bool on);
+ int (*set_polarity)(struct tcpc_dev *dev,
+ enum typec_cc_polarity polarity);
+ int (*set_vconn)(struct tcpc_dev *dev, bool on);
+ int (*set_vbus)(struct tcpc_dev *dev, bool on, bool charge);
+ int (*set_current_limit)(struct tcpc_dev *dev, u32 max_ma, u32 mv);
+ int (*set_pd_rx)(struct tcpc_dev *dev, bool on);
+ int (*set_roles)(struct tcpc_dev *dev, bool attached,
+ enum typec_role role, enum typec_data_role data);
+ int (*start_drp_toggling)(struct tcpc_dev *dev,
+ enum typec_cc_status cc);
+ int (*try_role)(struct tcpc_dev *dev, int role);
+ int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type,
+ const struct pd_message *msg);
+};
+
+struct tcpm_port;
+
+struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc);
+void tcpm_unregister_port(struct tcpm_port *port);
+
+int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo);
+int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
+ unsigned int nr_pdo,
+ unsigned int operating_snk_mw);
+
+void tcpm_vbus_change(struct tcpm_port *port);
+void tcpm_cc_change(struct tcpm_port *port);
+void tcpm_pd_receive(struct tcpm_port *port,
+ const struct pd_message *msg);
+void tcpm_pd_transmit_complete(struct tcpm_port *port,
+ enum tcpm_transmit_status status);
+void tcpm_pd_hard_reset(struct tcpm_port *port);
+void tcpm_tcpc_reset(struct tcpm_port *port);
+
+#endif /* __LINUX_USB_TCPM_H */
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LINUX_USB_TYPEC_H
+#define __LINUX_USB_TYPEC_H
+
+#include <linux/types.h>
+
+/* USB Type-C Specification releases */
+#define USB_TYPEC_REV_1_0 0x100 /* 1.0 */
+#define USB_TYPEC_REV_1_1 0x110 /* 1.1 */
+#define USB_TYPEC_REV_1_2 0x120 /* 1.2 */
+
+struct typec_partner;
+struct typec_cable;
+struct typec_plug;
+struct typec_port;
+
+struct fwnode_handle;
+struct device;
+
+enum typec_port_type {
+ TYPEC_PORT_SRC,
+ TYPEC_PORT_SNK,
+ TYPEC_PORT_DRP,
+};
+
+enum typec_port_data {
+ TYPEC_PORT_DFP,
+ TYPEC_PORT_UFP,
+ TYPEC_PORT_DRD,
+};
+
+enum typec_plug_type {
+ USB_PLUG_NONE,
+ USB_PLUG_TYPE_A,
+ USB_PLUG_TYPE_B,
+ USB_PLUG_TYPE_C,
+ USB_PLUG_CAPTIVE,
+};
+
+enum typec_data_role {
+ TYPEC_DEVICE,
+ TYPEC_HOST,
+};
+
+enum typec_role {
+ TYPEC_SINK,
+ TYPEC_SOURCE,
+};
+
+enum typec_pwr_opmode {
+ TYPEC_PWR_MODE_USB,
+ TYPEC_PWR_MODE_1_5A,
+ TYPEC_PWR_MODE_3_0A,
+ TYPEC_PWR_MODE_PD,
+};
+
+enum typec_accessory {
+ TYPEC_ACCESSORY_NONE,
+ TYPEC_ACCESSORY_AUDIO,
+ TYPEC_ACCESSORY_DEBUG,
+};
+
+#define TYPEC_MAX_ACCESSORY 3
+
+enum typec_orientation {
+ TYPEC_ORIENTATION_NONE,
+ TYPEC_ORIENTATION_NORMAL,
+ TYPEC_ORIENTATION_REVERSE,
+};
+
+/*
+ * struct usb_pd_identity - USB Power Delivery identity data
+ * @id_header: ID Header VDO
+ * @cert_stat: Cert Stat VDO
+ * @product: Product VDO
+ *
+ * USB power delivery Discover Identity command response data.
+ *
+ * REVISIT: This is USB Power Delivery specific information, so this structure
+ * probable belongs to USB Power Delivery header file once we have them.
+ */
+struct usb_pd_identity {
+ u32 id_header;
+ u32 cert_stat;
+ u32 product;
+};
+
+int typec_partner_set_identity(struct typec_partner *partner);
+int typec_cable_set_identity(struct typec_cable *cable);
+
+/*
+ * struct typec_altmode_desc - USB Type-C Alternate Mode Descriptor
+ * @svid: Standard or Vendor ID
+ * @mode: Index of the Mode
+ * @vdo: VDO returned by Discover Modes USB PD command
+ * @roles: Only for ports. DRP if the mode is available in both roles
+ *
+ * Description of an Alternate Mode which a connector, cable plug or partner
+ * supports.
+ */
+struct typec_altmode_desc {
+ u16 svid;
+ u8 mode;
+ u32 vdo;
+ /* Only used with ports */
+ enum typec_port_data roles;
+};
+
+struct typec_altmode
+*typec_partner_register_altmode(struct typec_partner *partner,
+ const struct typec_altmode_desc *desc);
+struct typec_altmode
+*typec_plug_register_altmode(struct typec_plug *plug,
+ const struct typec_altmode_desc *desc);
+struct typec_altmode
+*typec_port_register_altmode(struct typec_port *port,
+ const struct typec_altmode_desc *desc);
+void typec_unregister_altmode(struct typec_altmode *altmode);
+
+struct typec_port *typec_altmode2port(struct typec_altmode *alt);
+
+void typec_altmode_update_active(struct typec_altmode *alt, bool active);
+
+enum typec_plug_index {
+ TYPEC_PLUG_SOP_P,
+ TYPEC_PLUG_SOP_PP,
+};
+
+/*
+ * struct typec_plug_desc - USB Type-C Cable Plug Descriptor
+ * @index: SOP Prime for the plug connected to DFP and SOP Double Prime for the
+ * plug connected to UFP
+ *
+ * Represents USB Type-C Cable Plug.
+ */
+struct typec_plug_desc {
+ enum typec_plug_index index;
+};
+
+/*
+ * struct typec_cable_desc - USB Type-C Cable Descriptor
+ * @type: The plug type from USB PD Cable VDO
+ * @active: Is the cable active or passive
+ * @identity: Result of Discover Identity command
+ *
+ * Represents USB Type-C Cable attached to USB Type-C port.
+ */
+struct typec_cable_desc {
+ enum typec_plug_type type;
+ unsigned int active:1;
+ struct usb_pd_identity *identity;
+};
+
+/*
+ * struct typec_partner_desc - USB Type-C Partner Descriptor
+ * @usb_pd: USB Power Delivery support
+ * @accessory: Audio, Debug or none.
+ * @identity: Discover Identity command data
+ *
+ * Details about a partner that is attached to USB Type-C port. If @identity
+ * member exists when partner is registered, a directory named "identity" is
+ * created to sysfs for the partner device.
+ */
+struct typec_partner_desc {
+ unsigned int usb_pd:1;
+ enum typec_accessory accessory;
+ struct usb_pd_identity *identity;
+};
+
+/*
+ * struct typec_capability - USB Type-C Port Capabilities
+ * @type: Supported power role of the port
+ * @data: Supported data role of the port
+ * @no_vconn: The port does not support vconn
+ * @revision: USB Type-C Specification release. Binary coded decimal
+ * @pd_revision: USB Power Delivery Specification revision if supported
+ * @prefer_role: Initial role preference (DRP ports).
+ * @accessory: Supported Accessory Modes
+ * @sw: Cable plug orientation switch
+ * @mux: Multiplexer switch for Alternate/Accessory Modes
+ * @fwnode: Optional fwnode of the port
+ * @try_role: Set data role preference for DRP port
+ * @dr_set: Set Data Role
+ * @pr_set: Set Power Role
+ * @vconn_set: Set VCONN Role
+ * @port_type_set: Set port type
+ *
+ * Static capabilities of a single USB Type-C port.
+ */
+struct typec_capability {
+ enum typec_port_type type;
+ enum typec_port_data data;
+ bool no_vconn;
+ u16 revision; /* 0120H = "1.2" */
+ u16 pd_revision; /* 0300H = "3.0" */
+ int prefer_role;
+ enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
+
+ struct typec_switch *sw;
+ struct typec_mux *mux;
+ struct fwnode_handle *fwnode;
+
+ int (*try_role)(const struct typec_capability *,
+ int role);
+
+ int (*dr_set)(const struct typec_capability *,
+ enum typec_data_role);
+ int (*pr_set)(const struct typec_capability *,
+ enum typec_role);
+ int (*vconn_set)(const struct typec_capability *,
+ enum typec_role);
+ int (*port_type_set)(const struct typec_capability *,
+ enum typec_port_type);
+};
+
+/* Specific to try_role(). Indicates the user want's to clear the preference. */
+#define TYPEC_NO_PREFERRED_ROLE (-1)
+
+struct typec_port *typec_register_port(struct device *parent,
+ const struct typec_capability *cap);
+void typec_unregister_port(struct typec_port *port);
+
+struct typec_partner *typec_register_partner(struct typec_port *port,
+ struct typec_partner_desc *desc);
+void typec_unregister_partner(struct typec_partner *partner);
+
+struct typec_cable *typec_register_cable(struct typec_port *port,
+ struct typec_cable_desc *desc);
+void typec_unregister_cable(struct typec_cable *cable);
+
+struct typec_plug *typec_register_plug(struct typec_cable *cable,
+ struct typec_plug_desc *desc);
+void typec_unregister_plug(struct typec_plug *plug);
+
+void typec_set_data_role(struct typec_port *port, enum typec_data_role role);
+void typec_set_pwr_role(struct typec_port *port, enum typec_role role);
+void typec_set_vconn_role(struct typec_port *port, enum typec_role role);
+void typec_set_pwr_opmode(struct typec_port *port, enum typec_pwr_opmode mode);
+
+int typec_set_orientation(struct typec_port *port,
+ enum typec_orientation orientation);
+enum typec_orientation typec_get_orientation(struct typec_port *port);
+int typec_set_mode(struct typec_port *port, int mode);
+
+int typec_find_port_power_role(const char *name);
+int typec_find_power_role(const char *name);
+int typec_find_port_data_role(const char *name);
+#endif /* __LINUX_USB_TYPEC_H */
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __USB_TYPEC_ALTMODE_H
+#define __USB_TYPEC_ALTMODE_H
+
+#include <linux/mod_devicetable.h>
+#include <linux/usb/typec.h>
+#include <linux/device.h>
+
+#define MODE_DISCOVERY_MAX 6
+
+struct typec_altmode_ops;
+
+/**
+ * struct typec_altmode - USB Type-C alternate mode device
+ * @dev: Driver model's view of this device
+ * @svid: Standard or Vendor ID (SVID) of the alternate mode
+ * @mode: Index of the Mode
+ * @vdo: VDO returned by Discover Modes USB PD command
+ * @active: Tells has the mode been entered or not
+ * @desc: Optional human readable description of the mode
+ * @ops: Operations vector from the driver
+ */
+struct typec_altmode {
+ struct device dev;
+ u16 svid;
+ int mode;
+ u32 vdo;
+ unsigned int active:1;
+
+ char *desc;
+ const struct typec_altmode_ops *ops;
+};
+
+#define to_typec_altmode(d) container_of(d, struct typec_altmode, dev)
+
+static inline void typec_altmode_set_drvdata(struct typec_altmode *altmode,
+ void *data)
+{
+ dev_set_drvdata(&altmode->dev, data);
+}
+
+static inline void *typec_altmode_get_drvdata(struct typec_altmode *altmode)
+{
+ return dev_get_drvdata(&altmode->dev);
+}
+
+/**
+ * struct typec_altmode_ops - Alternate mode specific operations vector
+ * @enter: Operations to be executed with Enter Mode Command
+ * @exit: Operations to be executed with Exit Mode Command
+ * @attention: Callback for Attention Command
+ * @vdm: Callback for SVID specific commands
+ * @notify: Communication channel for platform and the alternate mode
+ * @activate: User callback for Enter/Exit Mode
+ */
+struct typec_altmode_ops {
+ int (*enter)(struct typec_altmode *altmode);
+ int (*exit)(struct typec_altmode *altmode);
+ void (*attention)(struct typec_altmode *altmode, u32 vdo);
+ int (*vdm)(struct typec_altmode *altmode, const u32 hdr,
+ const u32 *vdo, int cnt);
+ int (*notify)(struct typec_altmode *altmode, unsigned long conf,
+ void *data);
+ int (*activate)(struct typec_altmode *altmode, int activate);
+};
+
+int typec_altmode_enter(struct typec_altmode *altmode);
+int typec_altmode_exit(struct typec_altmode *altmode);
+void typec_altmode_attention(struct typec_altmode *altmode, u32 vdo);
+int typec_altmode_vdm(struct typec_altmode *altmode,
+ const u32 header, const u32 *vdo, int count);
+int typec_altmode_notify(struct typec_altmode *altmode, unsigned long conf,
+ void *data);
+const struct typec_altmode *
+typec_altmode_get_partner(struct typec_altmode *altmode);
+
+/*
+ * These are the connector states (USB, Safe and Alt Mode) defined in USB Type-C
+ * Specification. SVID specific connector states are expected to follow and
+ * start from the value TYPEC_STATE_MODAL.
+ */
+enum {
+ TYPEC_STATE_SAFE, /* USB Safe State */
+ TYPEC_STATE_USB, /* USB Operation */
+ TYPEC_STATE_MODAL, /* Alternate Modes */
+};
+
+/*
+ * For the muxes there is no difference between Accessory Modes and Alternate
+ * Modes, so the Accessory Modes are supplied with specific modal state values
+ * here. Unlike with Alternate Modes, where the mux will be linked with the
+ * alternate mode device, the mux for Accessory Modes will be linked with the
+ * port device instead.
+ *
+ * Port drivers can use TYPEC_MODE_AUDIO and TYPEC_MODE_DEBUG as the mode
+ * value for typec_set_mode() when accessory modes are supported.
+ */
+enum {
+ TYPEC_MODE_AUDIO = TYPEC_STATE_MODAL, /* Audio Accessory */
+ TYPEC_MODE_DEBUG, /* Debug Accessory */
+};
+
+#define TYPEC_MODAL_STATE(_state_) ((_state_) + TYPEC_STATE_MODAL)
+
+struct typec_altmode *typec_altmode_get_plug(struct typec_altmode *altmode,
+ enum typec_plug_index index);
+void typec_altmode_put_plug(struct typec_altmode *plug);
+
+struct typec_altmode *typec_match_altmode(struct typec_altmode **altmodes,
+ size_t n, u16 svid, u8 mode);
+
+struct typec_altmode *
+typec_altmode_register_notifier(struct device *dev, u16 svid, u8 mode,
+ struct notifier_block *nb);
+
+void typec_altmode_unregister_notifier(struct typec_altmode *adev,
+ struct notifier_block *nb);
+
+/**
+ * typec_altmode_get_orientation - Get cable plug orientation
+ * altmode: Handle to the alternate mode
+ */
+static inline enum typec_orientation
+typec_altmode_get_orientation(struct typec_altmode *altmode)
+{
+ return typec_get_orientation(typec_altmode2port(altmode));
+}
+
+/**
+ * struct typec_altmode_driver - USB Type-C alternate mode device driver
+ * @id_table: Null terminated array of SVIDs
+ * @probe: Callback for device binding
+ * @remove: Callback for device unbinding
+ * @driver: Device driver model driver
+ *
+ * These drivers will be bind to the partner alternate mode devices. They will
+ * handle all SVID specific communication.
+ */
+struct typec_altmode_driver {
+ const struct typec_device_id *id_table;
+ int (*probe)(struct typec_altmode *altmode);
+ void (*remove)(struct typec_altmode *altmode);
+ struct device_driver driver;
+};
+
+#define to_altmode_driver(d) container_of(d, struct typec_altmode_driver, \
+ driver)
+
+#define typec_altmode_register_driver(drv) \
+ __typec_altmode_register_driver(drv, THIS_MODULE)
+int __typec_altmode_register_driver(struct typec_altmode_driver *drv,
+ struct module *module);
+void typec_altmode_unregister_driver(struct typec_altmode_driver *drv);
+
+#define module_typec_altmode_driver(__typec_altmode_driver) \
+ module_driver(__typec_altmode_driver, typec_altmode_register_driver, \
+ typec_altmode_unregister_driver)
+
+#endif /* __USB_TYPEC_ALTMODE_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+#ifndef __USB_TYPEC_MUX
+#define __USB_TYPEC_MUX
+
+#include <linux/list.h>
+#include <linux/usb/typec.h>
+
+struct device;
+
+/**
+ * struct typec_switch - USB Type-C cable orientation switch
+ * @dev: Switch device
+ * @entry: List entry
+ * @set: Callback to the driver for setting the orientation
+ *
+ * USB Type-C pin flipper switch routing the correct data pairs from the
+ * connector to the USB controller depending on the orientation of the cable
+ * plug.
+ */
+struct typec_switch {
+ struct device *dev;
+ struct list_head entry;
+
+ int (*set)(struct typec_switch *sw, enum typec_orientation orientation);
+};
+
+/**
+ * struct typec_switch - USB Type-C connector pin mux
+ * @dev: Mux device
+ * @entry: List entry
+ * @set: Callback to the driver for setting the state of the mux
+ *
+ * Pin Multiplexer/DeMultiplexer switch routing the USB Type-C connector pins to
+ * different components depending on the requested mode of operation. Used with
+ * Accessory/Alternate modes.
+ */
+struct typec_mux {
+ struct device *dev;
+ struct list_head entry;
+
+ int (*set)(struct typec_mux *mux, int state);
+};
+
+struct typec_switch *typec_switch_get(struct device *dev);
+void typec_switch_put(struct typec_switch *sw);
+int typec_switch_register(struct typec_switch *sw);
+void typec_switch_unregister(struct typec_switch *sw);
+
+struct typec_mux *typec_mux_get(struct device *dev, const char *name);
+void typec_mux_put(struct typec_mux *mux);
+int typec_mux_register(struct typec_mux *mux);
+void typec_mux_unregister(struct typec_mux *mux);
+
+#endif /* __USB_TYPEC_MUX */
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff