mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
f7b31defc9
- updated doxygen for the whole usb_host stack
- doxygen for test_apps is not updated
- fixed error codes propagation problems in the usb_host stack
558 lines
20 KiB
C
558 lines
20 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stdbool.h>
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#include <sys/queue.h>
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#include "esp_err.h"
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#include "usb_private.h"
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#include "usb/usb_types_ch9.h"
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// ------------------------------------------------- Macros & Types ----------------------------------------------------
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// ----------------------- States --------------------------
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/**
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* @brief States of the HCD port
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*
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* @note The port can be thought of as an abstraction of the Root Hub that contains
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* a single port.
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* @note These states roughly match the port states outlined in 11.5.1 of the
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* USB2.0 specification.
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*/
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typedef enum {
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HCD_PORT_STATE_NOT_POWERED, /**< The port is not powered */
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HCD_PORT_STATE_DISCONNECTED, /**< The port is powered but no device is connected */
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HCD_PORT_STATE_DISABLED, /**< A device has connected to the port but has not been reset. SOF/keep alive are not being sent */
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HCD_PORT_STATE_RESETTING, /**< The port is issuing a reset condition */
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HCD_PORT_STATE_SUSPENDED, /**< The port has been suspended. */
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HCD_PORT_STATE_RESUMING, /**< The port is issuing a resume condition */
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HCD_PORT_STATE_ENABLED, /**< The port has been enabled. SOF/keep alive are being sent */
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HCD_PORT_STATE_RECOVERY, /**< Port needs to be recovered from a fatal error (port error, overcurrent, or sudden disconnection) */
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} hcd_port_state_t;
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/**
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* @brief States of an HCD pipe
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*
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* Active:
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* - Pipe is able to transmit data. URBs can be enqueued.
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* - Even if pipe has no URBs enqueued, it can still be in the active state.
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* Halted:
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* - An error has occurred on the pipe. URBs will no longer be executed.
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* - Halt should be cleared using the HCD_PIPE_CMD_CLEAR command
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*/
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typedef enum {
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HCD_PIPE_STATE_ACTIVE, /**< The pipe is active */
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HCD_PIPE_STATE_HALTED, /**< The pipe is halted */
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} hcd_pipe_state_t;
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// ----------------------- Events --------------------------
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/**
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* @brief HCD port events
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*
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* On receiving a port event, hcd_port_handle_event() should be called to handle that event
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*/
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typedef enum {
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HCD_PORT_EVENT_NONE, /**< No event has occurred. Or the previous event is no longer valid */
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HCD_PORT_EVENT_CONNECTION, /**< A device has been connected to the port */
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HCD_PORT_EVENT_DISCONNECTION, /**< A device disconnection has been detected */
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HCD_PORT_EVENT_ERROR, /**< A port error has been detected. Port is now HCD_PORT_STATE_RECOVERY */
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HCD_PORT_EVENT_OVERCURRENT, /**< Overcurrent detected on the port. Port is now HCD_PORT_STATE_RECOVERY */
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} hcd_port_event_t;
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/**
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* @brief HCD pipe events
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*
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* @note Pipe error events will put the pipe into the HCD_PIPE_STATE_HALTED state
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*/
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typedef enum {
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HCD_PIPE_EVENT_NONE, /**< The pipe has no events (used to indicate no events when polling) */
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HCD_PIPE_EVENT_URB_DONE, /**< The pipe has completed an URB. The URB can be dequeued */
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HCD_PIPE_EVENT_ERROR_XFER, /**< Excessive (three consecutive) transaction errors (e.g., no ACK, bad CRC etc) */
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HCD_PIPE_EVENT_ERROR_URB_NOT_AVAIL, /**< URB was not available */
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HCD_PIPE_EVENT_ERROR_OVERFLOW, /**< Received more data than requested. Usually a Packet babble error
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(i.e., an IN packet has exceeded the endpoint's MPS) */
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HCD_PIPE_EVENT_ERROR_STALL, /**< Pipe received a STALL response received */
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} hcd_pipe_event_t;
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// ---------------------- Commands -------------------------
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/**
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* @brief HCD port commands
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*/
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typedef enum {
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HCD_PORT_CMD_POWER_ON, /**< Power ON the port */
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HCD_PORT_CMD_POWER_OFF, /**< Power OFF the port. If the port is enabled, this will cause a HCD_PORT_EVENT_SUDDEN_DISCONN event.
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If the port is disabled, this will cause a HCD_PORT_EVENT_DISCONNECTION event. */
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HCD_PORT_CMD_RESET, /**< Issue a reset on the port */
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HCD_PORT_CMD_SUSPEND, /**< Suspend the port. All pipes must be halted */
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HCD_PORT_CMD_RESUME, /**< Resume the port */
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HCD_PORT_CMD_DISABLE, /**< Disable the port (stops the SOFs or keep alive). All pipes must be halted. */
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} hcd_port_cmd_t;
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/**
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* @brief HCD pipe commands
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*
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* The pipe commands represent the list of pipe manipulations outlined in 10.5.2.2. of USB2.0 specification.
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*/
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typedef enum {
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HCD_PIPE_CMD_HALT, /**< Halt an active pipe. The currently executing URB will be canceled. Enqueued URBs are left untouched */
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HCD_PIPE_CMD_FLUSH, /**< Can only be called when halted. Will cause all enqueued URBs to be canceled */
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HCD_PIPE_CMD_CLEAR, /**< Causes a halted pipe to become active again. Any enqueued URBs will being executing.*/
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} hcd_pipe_cmd_t;
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// -------------------- Object Types -----------------------
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/**
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* @brief Port handle type
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*/
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typedef void *hcd_port_handle_t;
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/**
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* @brief Pipe handle type
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*/
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typedef void *hcd_pipe_handle_t;
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/**
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* @brief Port event callback type
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*
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* This callback is run when a port event occurs
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*/
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typedef bool (*hcd_port_callback_t)(hcd_port_handle_t port_hdl, hcd_port_event_t port_event, void *user_arg, bool in_isr);
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/**
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* @brief Pipe event callback
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*
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* This callback is run when a pipe event occurs
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*/
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typedef bool (*hcd_pipe_callback_t)(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
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typedef enum {
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HCD_PORT_FIFO_BIAS_BALANCED, /**< Balanced FIFO sizing for RX, Non-periodic TX, and periodic TX */
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HCD_PORT_FIFO_BIAS_RX, /**< Bias towards a large RX FIFO */
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HCD_PORT_FIFO_BIAS_PTX, /**< Bias towards periodic TX FIFO */
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} hcd_port_fifo_bias_t;
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/**
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* @brief HCD configuration structure
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*/
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typedef struct {
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int intr_flags; /**< Interrupt flags for HCD interrupt */
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} hcd_config_t;
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/**
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* @brief Port configuration structure
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*/
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typedef struct {
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hcd_port_fifo_bias_t fifo_bias; /**< HCD port internal FIFO biasing */
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hcd_port_callback_t callback; /**< HCD port event callback */
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void *callback_arg; /**< User argument for HCD port callback */
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void *context; /**< Context variable used to associate the port with upper layer object */
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} hcd_port_config_t;
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/**
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* @brief Pipe configuration structure
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*
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* @note The callback can be set to NULL if no callback is required (e.g., using HCD in a polling manner).
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*/
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typedef struct {
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hcd_pipe_callback_t callback; /**< HCD pipe event ISR callback */
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void *callback_arg; /**< User argument for HCD pipe callback */
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void *context; /**< Context variable used to associate the pipe with upper layer object */
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const usb_ep_desc_t *ep_desc; /**< Pointer to endpoint descriptor of the pipe */
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usb_speed_t dev_speed; /**< Speed of the device */
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uint8_t dev_addr; /**< Device address of the pipe */
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} hcd_pipe_config_t;
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// --------------------------------------------- Host Controller Driver ------------------------------------------------
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/**
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* @brief Installs the Host Controller Driver
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*
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* - Allocates memory and interrupt resources for the HCD and underlying ports
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*
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* @note This function must be called before any other HCD function is called
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* @note Before calling this function, the Host Controller must already be un-clock gated and reset. The USB PHY
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* (internal or external, and associated GPIOs) must already be configured.
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*
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* @param[in] config HCD configuration
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*
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* @return
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* - ESP_OK: HCD successfully installed
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* - ESP_ERR_NO_MEM: Insufficient memory
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* - ESP_ERR_INVALID_STATE: HCD is already installed
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* - ESP_ERR_INVALID_ARG: Arguments are invalid
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*/
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esp_err_t hcd_install(const hcd_config_t *config);
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/**
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* @brief Uninstalls the HCD
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*
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* Before uninstalling the HCD, the following conditions should be met:
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* - All ports must be uninitialized, all pipes freed
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*
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* @note This function will simply free the resources used by the HCD. The underlying Host Controller and USB PHY will
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* not be disabled.
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*
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* @return
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* - ESP_OK: HCD successfully uninstalled
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* - ESP_ERR_INVALID_STATE: HCD is not in the right condition to be uninstalled
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*/
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esp_err_t hcd_uninstall(void);
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// ---------------------------------------------------- HCD Port -------------------------------------------------------
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/**
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* @brief Initialize a particular port of the HCD
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*
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* After a port is initialized, it will be put into the HCD_PORT_STATE_NOT_POWERED state.
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*
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* @note The host controller only has one port, thus the only valid port_number is 1
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*
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* @param[in] port_number Port number
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* @param[in] port_config Port configuration
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* @param[out] port_hdl Port handle
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*
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* @return
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* - ESP_OK: Port enabled
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* - ESP_ERR_NO_MEM: Insufficient memory
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* - ESP_ERR_INVALID_STATE: The port is already enabled
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* - ESP_ERR_NOT_FOUND: Port number not found
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* - ESP_ERR_INVALID_ARG: Arguments are invalid
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*/
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esp_err_t hcd_port_init(int port_number, const hcd_port_config_t *port_config, hcd_port_handle_t *port_hdl);
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/**
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* @brief Deinitialize a particular port
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*
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* The port must be placed in the HCD_PORT_STATE_NOT_POWERED or HCD_PORT_STATE_RECOVERY state before it can be
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* deinitialized.
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*
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* @param[in] port_hdl Port handle
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*
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* @return
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* - ESP_OK: Port disabled
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* - ESP_ERR_INVALID_STATE: The port is not in a condition to be disabled (not unpowered)
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*/
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esp_err_t hcd_port_deinit(hcd_port_handle_t port_hdl);
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/**
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* @brief Execute a port command
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*
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* Call this function to manipulate a port (e.g., powering it ON, sending a reset etc). The following conditions
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* must be met when calling this function:
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* - The port is in the correct state for the command (e.g., port must be suspended in order to use the resume command)
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* - The port does not have any pending events
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*
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* @note This function is internally protected by a mutex. If multiple threads call this function, this function will
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* can block.
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* @note The function can block
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* @note For some of the commands that involve a blocking delay (e.g., reset and resume), if the port's state changes
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* unexpectedly (e.g., a disconnect during a resume), this function will return ESP_ERR_INVALID_RESPONSE.
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*
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* @param[in] port_hdl Port handle
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* @param[in] command Command for the HCD port
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*
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* @return
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* - ESP_OK: Command executed successfully
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* - ESP_ERR_INVALID_STATE: Conditions have not been met to call this function
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* - ESP_ERR_INVALID_RESPONSE: The command is no longer valid due to a change in the port's state
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*/
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esp_err_t hcd_port_command(hcd_port_handle_t port_hdl, hcd_port_cmd_t command);
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/**
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* @brief Get the port's current state
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*
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* @param[in] port_hdl Port handle
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* @return hcd_port_state_t Current port state
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*/
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hcd_port_state_t hcd_port_get_state(hcd_port_handle_t port_hdl);
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/**
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* @brief Get the speed of the port
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*
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* The speed of the port is determined by the speed of the device connected to it.
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*
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* @note This function is only valid after a device directly to the port and has been reset
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*
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* @param[in] port_hdl Port handle
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* @param[out] speed Speed of the port
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*
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* @return
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* - ESP_OK Device speed obtained
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* - ESP_ERR_INVALID_STATE: No valid device connected to the port
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* - ESP_ERR_INVALID_ARG: Invalid arguments
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*/
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esp_err_t hcd_port_get_speed(hcd_port_handle_t port_hdl, usb_speed_t *speed);
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/**
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* @brief Handle a ports event
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*
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* When an port event occurs (as indicated by a callback), this function should be called the handle this event. A
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* port's event should always be handled before attempting to execute a port command. Note that is actually handled
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* may be different than the event reflected in the callback.
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*
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* If the port has no events, this function will return HCD_PORT_EVENT_NONE.
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*
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* @note If callbacks are not used, this function can also be used in a polling manner to repeatedly check for and
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* handle a port's events.
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* @note This function is internally protected by a mutex. If multiple threads call this function, this function will
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* can block.
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*
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* @param[in] port_hdl Port handle
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*
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* @return
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* - hcd_port_event_t The port event that was handled
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*/
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hcd_port_event_t hcd_port_handle_event(hcd_port_handle_t port_hdl);
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/**
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* @brief Recover a port after a fatal error has occurred on it
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*
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* The port must be in the HCD_PORT_STATE_RECOVERY state to be called. Recovering the port will involve issuing a soft
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* reset on the underlying USB controller. The port will be returned to the HCD_PORT_STATE_NOT_POWERED state.
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*
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* @param[in] port_hdl Port handle
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*
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* @return
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* - ESP_OK Port recovered successfully
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* - ESP_ERR_INVALID_STATE Port is not in the HCD_PORT_STATE_RECOVERY state
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*/
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esp_err_t hcd_port_recover(hcd_port_handle_t port_hdl);
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/**
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* @brief Get the context variable of a port
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*
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* @param[in] port_hdl Port handle
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*
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* @return
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* - void* Context variable
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*/
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void *hcd_port_get_context(hcd_port_handle_t port_hdl);
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/**
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* @brief Set the bias of the HCD port's internal FIFO
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*
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* @note This function can only be called when the following conditions are met:
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* - Port is initialized
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* - Port does not have any pending events
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* - Port does not have any allocated pipes
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*
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* @param[in] port_hdl Port handle
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* @param[in] bias Fifo bias
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*
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* @return
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* - ESP_OK FIFO sizing successfully set
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* - ESP_ERR_INVALID_STATE Incorrect state for FIFO sizes to be set
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*/
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esp_err_t hcd_port_set_fifo_bias(hcd_port_handle_t port_hdl, hcd_port_fifo_bias_t bias);
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// --------------------------------------------------- HCD Pipes -------------------------------------------------------
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/**
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* @brief Allocate a pipe
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*
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* When allocating a pipe, the HCD will assess whether there are sufficient resources (i.e., bus time, and controller
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* channels). If sufficient, the pipe will be allocated.
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*
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* @note The host port must be in the enabled state before a pipe can be allocated
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*
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* @param[in] port_hdl Handle of the port this pipe will be routed through
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* @param[in] pipe_config Pipe configuration
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* @param[out] pipe_hdl Pipe handle
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*
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* @return
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* - ESP_OK: Pipe successfully allocated
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* - ESP_ERR_NO_MEM: Insufficient memory
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* - ESP_ERR_INVALID_ARG: Arguments are invalid
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* - ESP_ERR_INVALID_STATE: Host port is not in the correct state to allocate a pipe
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* - ESP_ERR_NOT_SUPPORTED: The pipe's configuration cannot be supported
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*/
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esp_err_t hcd_pipe_alloc(hcd_port_handle_t port_hdl, const hcd_pipe_config_t *pipe_config, hcd_pipe_handle_t *pipe_hdl);
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/**
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* @brief Get maximum packet size (mps) of HCD pipe
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*
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* @param[in] port_hdl Pipe handle
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*
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* @return
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* - HCD pipe mps
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*/
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int hcd_pipe_get_mps(hcd_pipe_handle_t pipe_hdl);
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/**
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* @brief Free a pipe
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*
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* Frees the resources used by an HCD pipe. The pipe's handle should be discarded after calling this function. The pipe
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* must be in following condition before it can be freed:
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* - All URBs have been dequeued
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*
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* @param[in] pipe_hdl Pipe handle
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*
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* @return
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* - ESP_OK: Pipe successfully freed
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* - ESP_ERR_INVALID_STATE: Pipe is not in a condition to be freed
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*/
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esp_err_t hcd_pipe_free(hcd_pipe_handle_t pipe_hdl);
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/**
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* @brief Update a pipe's maximum packet size
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*
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* This function is intended to be called on default pipes during enumeration in order to update the pipe's maximum
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* packet size. This function can only be called on a pipe that has met the following conditions:
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* - Pipe is not current processing a command
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* - Pipe does not have any enqueued URBs
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* - Port cannot be resetting
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*
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* @param[in] pipe_hdl Pipe handle
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* @param[in] mps New Maximum Packet Size
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*
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* @return
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* - ESP_OK: Pipe successfully updated
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* - ESP_ERR_INVALID_STATE: Pipe is not in a condition to be updated
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*/
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esp_err_t hcd_pipe_update_mps(hcd_pipe_handle_t pipe_hdl, int mps);
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/**
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* @brief Update a pipe's device address
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*
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* This function is intended to be called on default pipes during enumeration in order to update the pipe's device
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* address. This function can only be called on a pipe that has met the following conditions:
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* - Pipe is not current processing a command
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* - Pipe does not have any enqueued URBs
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* - Port cannot be resetting
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*
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* @param[in] pipe_hdl Pipe handle
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* @param[in] dev_addr New device address
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*
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* @return
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* - ESP_OK: Pipe successfully updated
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* - ESP_ERR_INVALID_STATE: Pipe is not in a condition to be updated
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*/
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esp_err_t hcd_pipe_update_dev_addr(hcd_pipe_handle_t pipe_hdl, uint8_t dev_addr);
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/**
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* @brief Get the context variable of a pipe from its handle
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*
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* @param[in] pipe_hdl Pipe handle
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*
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* @return
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* - void* Context variable
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*/
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void *hcd_pipe_get_context(hcd_pipe_handle_t pipe_hdl);
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/**
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* @brief Get the current state of the pipe
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*
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* @param[in] pipe_hdl Pipe handle
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|
*
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|
* @return
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|
* - hcd_pipe_state_t Current state of the pipe
|
|
*/
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|
hcd_pipe_state_t hcd_pipe_get_state(hcd_pipe_handle_t pipe_hdl);
|
|
|
|
/**
|
|
* @brief Get the number of in-flight URBs in the pipe
|
|
*
|
|
* Returns the current number of URBs that have been enqueued (via hcd_urb_enqueue()) and have yet to be dequeued (via
|
|
* hcd_urb_dequeue()).
|
|
*
|
|
* @param[in] pipe_hdl Pipe handle
|
|
*
|
|
* @return
|
|
* - Number of in-flight URBs
|
|
*/
|
|
unsigned int hcd_pipe_get_num_urbs(hcd_pipe_handle_t pipe_hdl);
|
|
|
|
/**
|
|
* @brief Execute a command on a particular pipe
|
|
*
|
|
* Pipe commands allow a pipe to be manipulated (such as clearing a halt, retiring all URBs etc)
|
|
*
|
|
* @note This function can block
|
|
*
|
|
* @param[in] pipe_hdl Pipe handle
|
|
* @param[in] command Pipe command
|
|
*
|
|
* @return
|
|
* - ESP_OK: Command executed successfully
|
|
* - ESP_ERR_INVALID_STATE: The pipe is not in the correct state/condition too execute the command
|
|
*/
|
|
esp_err_t hcd_pipe_command(hcd_pipe_handle_t pipe_hdl, hcd_pipe_cmd_t command);
|
|
|
|
/**
|
|
* @brief Get the last event that occurred on a pipe
|
|
*
|
|
* This function allows a pipe to be polled for events (i.e., when callbacks are not used). Once an event has been
|
|
* obtained, this function reset the last event of the pipe to HCD_PIPE_EVENT_NONE.
|
|
*
|
|
* @param[in] pipe_hdl Pipe handle
|
|
*
|
|
* @return
|
|
* - hcd_pipe_event_t Last pipe event to occur
|
|
*/
|
|
hcd_pipe_event_t hcd_pipe_get_event(hcd_pipe_handle_t pipe_hdl);
|
|
|
|
// ---------------------------------------------------- HCD URBs -------------------------------------------------------
|
|
|
|
/**
|
|
* @brief Enqueue an URB to a particular pipe
|
|
*
|
|
* The following conditions must be met before an URB can be enqueued:
|
|
* - The URB is properly initialized (data buffer and transfer length are set)
|
|
* - The URB must not already be enqueued
|
|
* - The pipe must be in the HCD_PIPE_STATE_ACTIVE state
|
|
* - The pipe cannot be executing a command
|
|
*
|
|
* @param[in] pipe_hdl Pipe handle
|
|
* @param[in] urb URB to enqueue
|
|
*
|
|
* @return
|
|
* - ESP_OK: URB enqueued successfully
|
|
* - ESP_ERR_INVALID_STATE: Conditions not met to enqueue URB
|
|
*/
|
|
esp_err_t hcd_urb_enqueue(hcd_pipe_handle_t pipe_hdl, urb_t *urb);
|
|
|
|
/**
|
|
* @brief Dequeue an URB from a particular pipe
|
|
*
|
|
* This function should be called on a pipe after a pipe receives a HCD_PIPE_EVENT_URB_DONE event. If a pipe has
|
|
* multiple URBs that can be dequeued, this function should be called repeatedly until all URBs are dequeued. If a pipe
|
|
* has no more URBs to dequeue, this function will return NULL.
|
|
*
|
|
* @param[in] pipe_hdl Pipe handle
|
|
*
|
|
* @return
|
|
* - urb_t* Dequeued URB, or NULL if no more URBs to dequeue
|
|
*/
|
|
urb_t *hcd_urb_dequeue(hcd_pipe_handle_t pipe_hdl);
|
|
|
|
/**
|
|
* @brief Abort an enqueued URB
|
|
*
|
|
* This function will attempt to abort an URB that is already enqueued. If the URB has yet to be executed, it will be
|
|
* "canceled" and can then be dequeued. If the URB is currently in-flight or has already completed, the URB will not be
|
|
* affected by this function.
|
|
*
|
|
* @param[in] urb URB to abort
|
|
*
|
|
* @return
|
|
* - ESP_OK: URB successfully aborted, or was not affected by this function
|
|
* - ESP_ERR_INVALID_STATE: URB was never enqueued
|
|
*/
|
|
esp_err_t hcd_urb_abort(urb_t *urb);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|