// SPDX-License-Identifier: GPL-2.0 /* * USB Type-C Connector System Software Interface driver * * Copyright (C) 2017, Intel Corporation * Author: Heikki Krogerus <[email protected]> */ #include <linux/completion.h> #include <linux/property.h> #include <linux/device.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/usb/typec_dp.h> #include "ucsi.h" #include "trace.h" /* * UCSI_TIMEOUT_MS - PPM communication timeout * * Ideally we could use MIN_TIME_TO_RESPOND_WITH_BUSY (which is defined in UCSI * specification) here as reference, but unfortunately we can't. It is very * difficult to estimate the time it takes for the system to process the command * before it is actually passed to the PPM. */ #define UCSI_TIMEOUT_MS … /* * UCSI_SWAP_TIMEOUT_MS - Timeout for role swap requests * * 5 seconds is close to the time it takes for CapsCounter to reach 0, so even * if the PPM does not generate Connector Change events before that with * partners that do not support USB Power Delivery, this should still work. */ #define UCSI_SWAP_TIMEOUT_MS … void ucsi_notify_common(struct ucsi *ucsi, u32 cci) { … } EXPORT_SYMBOL_GPL(…); int ucsi_sync_control_common(struct ucsi *ucsi, u64 command) { … } EXPORT_SYMBOL_GPL(…); static int ucsi_acknowledge(struct ucsi *ucsi, bool conn_ack) { … } static int ucsi_run_command(struct ucsi *ucsi, u64 command, u32 *cci, void *data, size_t size, bool conn_ack) { … } static int ucsi_read_error(struct ucsi *ucsi, u8 connector_num) { … } static int ucsi_send_command_common(struct ucsi *ucsi, u64 cmd, void *data, size_t size, bool conn_ack) { … } int ucsi_send_command(struct ucsi *ucsi, u64 command, void *data, size_t size) { … } EXPORT_SYMBOL_GPL(…); /* -------------------------------------------------------------------------- */ struct ucsi_work { … }; static void ucsi_poll_worker(struct work_struct *work) { … } static int ucsi_partner_task(struct ucsi_connector *con, int (*cb)(struct ucsi_connector *), int retries, unsigned long delay) { … } /* -------------------------------------------------------------------------- */ void ucsi_altmode_update_active(struct ucsi_connector *con) { … } static int ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid) { … } static int ucsi_next_altmode(struct typec_altmode **alt) { … } static int ucsi_get_num_altmode(struct typec_altmode **alt) { … } static int ucsi_register_altmode(struct ucsi_connector *con, struct typec_altmode_desc *desc, u8 recipient) { … } static int ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient) { … } static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient) { … } static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient) { … } static int ucsi_read_pdos(struct ucsi_connector *con, enum typec_role role, int is_partner, u32 *pdos, int offset, int num_pdos) { … } static int ucsi_get_pdos(struct ucsi_connector *con, enum typec_role role, int is_partner, u32 *pdos) { … } static int ucsi_get_src_pdos(struct ucsi_connector *con) { … } static struct usb_power_delivery_capabilities *ucsi_get_pd_caps(struct ucsi_connector *con, enum typec_role role, bool is_partner) { … } static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient, u8 offset, u8 bytes, void *resp) { … } static int ucsi_get_identity(struct ucsi_connector *con, u8 recipient, struct usb_pd_identity *id) { … } static int ucsi_get_partner_identity(struct ucsi_connector *con) { … } static int ucsi_get_cable_identity(struct ucsi_connector *con) { … } static int ucsi_check_altmodes(struct ucsi_connector *con) { … } static void ucsi_register_device_pdos(struct ucsi_connector *con) { … } static int ucsi_register_partner_pdos(struct ucsi_connector *con) { … } static void ucsi_unregister_partner_pdos(struct ucsi_connector *con) { … } static int ucsi_register_plug(struct ucsi_connector *con) { … } static void ucsi_unregister_plug(struct ucsi_connector *con) { … } static int ucsi_register_cable(struct ucsi_connector *con) { … } static void ucsi_unregister_cable(struct ucsi_connector *con) { … } static void ucsi_pwr_opmode_change(struct ucsi_connector *con) { … } static int ucsi_register_partner(struct ucsi_connector *con) { … } static void ucsi_unregister_partner(struct ucsi_connector *con) { … } static void ucsi_partner_change(struct ucsi_connector *con) { … } static int ucsi_check_connector_capability(struct ucsi_connector *con) { … } static int ucsi_check_connection(struct ucsi_connector *con) { … } static int ucsi_check_cable(struct ucsi_connector *con) { … } static void ucsi_handle_connector_change(struct work_struct *work) { … } /** * ucsi_connector_change - Process Connector Change Event * @ucsi: UCSI Interface * @num: Connector number */ void ucsi_connector_change(struct ucsi *ucsi, u8 num) { … } EXPORT_SYMBOL_GPL(…); /* -------------------------------------------------------------------------- */ static int ucsi_reset_connector(struct ucsi_connector *con, bool hard) { … } static int ucsi_reset_ppm(struct ucsi *ucsi) { … } static int ucsi_role_cmd(struct ucsi_connector *con, u64 command) { … } static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role) { … } static int ucsi_pr_swap(struct typec_port *port, enum typec_role role) { … } static const struct typec_operations ucsi_ops = …; /* Caller must call fwnode_handle_put() after use */ static struct fwnode_handle *ucsi_find_fwnode(struct ucsi_connector *con) { … } static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con) { … } static u64 ucsi_get_supported_notifications(struct ucsi *ucsi) { … } /** * ucsi_init - Initialize UCSI interface * @ucsi: UCSI to be initialized * * Registers all ports @ucsi has and enables all notification events. */ static int ucsi_init(struct ucsi *ucsi) { … } static void ucsi_resume_work(struct work_struct *work) { … } int ucsi_resume(struct ucsi *ucsi) { … } EXPORT_SYMBOL_GPL(…); static void ucsi_init_work(struct work_struct *work) { … } /** * ucsi_get_drvdata - Return private driver data pointer * @ucsi: UCSI interface */ void *ucsi_get_drvdata(struct ucsi *ucsi) { … } EXPORT_SYMBOL_GPL(…); /** * ucsi_set_drvdata - Assign private driver data pointer * @ucsi: UCSI interface * @data: Private data pointer */ void ucsi_set_drvdata(struct ucsi *ucsi, void *data) { … } EXPORT_SYMBOL_GPL(…); /** * ucsi_create - Allocate UCSI instance * @dev: Device interface to the PPM (Platform Policy Manager) * @ops: I/O routines */ struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops) { … } EXPORT_SYMBOL_GPL(…); /** * ucsi_destroy - Free UCSI instance * @ucsi: UCSI instance to be freed */ void ucsi_destroy(struct ucsi *ucsi) { … } EXPORT_SYMBOL_GPL(…); /** * ucsi_register - Register UCSI interface * @ucsi: UCSI instance */ int ucsi_register(struct ucsi *ucsi) { … } EXPORT_SYMBOL_GPL(…); /** * ucsi_unregister - Unregister UCSI interface * @ucsi: UCSI interface to be unregistered * * Unregister UCSI interface that was created with ucsi_register(). */ void ucsi_unregister(struct ucsi *ucsi) { … } EXPORT_SYMBOL_GPL(…); static int __init ucsi_module_init(void) { … } module_init(…) …; static void __exit ucsi_module_exit(void) { … } module_exit(ucsi_module_exit); MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …;
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