esp-idf/components/usb/private_include/usbh.h

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/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include <sys/queue.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "hcd.h"
#include "usb/usb_types_ch9.h"
#include "usb/usb_types_stack.h"
#ifdef __cplusplus
extern "C" {
#endif
// ------------------------------------------------------ Types --------------------------------------------------------
// ----------------------- Events --------------------------
typedef enum {
USBH_EVENT_DEV_NEW, /**< A new device has been enumerated and added to the device pool */
USBH_EVENT_DEV_GONE, /**< A device is gone. Clients should close the device */
USBH_EVENT_DEV_ALL_FREE, /**< All devices have been freed */
} usbh_event_t;
/**
* @brief Hub driver requests
*
* Various requests of the Hub driver that the USBH can make.
*/
typedef enum {
USBH_HUB_REQ_PORT_DISABLE, /**< Request that the Hub driver disable a particular port (occurs after a device
has been freed). Hub driver should respond with a USBH_HUB_EVENT_PORT_DISABLED */
USBH_HUB_REQ_PORT_RECOVER, /**< Request that the Hub driver recovers a particular port (occurs after a gone
device has been freed). */
} usbh_hub_req_t;
/**
* @brief Hub driver events for the USBH
*
* These events as passed by the Hub driver to the USBH via usbh_hub_pass_event()
*
* USBH_HUB_EVENT_PORT_ERROR:
* - The port has encountered an error (such as a sudden disconnection). The device connected to that port is no longer valid.
* - The USBH should:
* - Trigger a USBH_EVENT_DEV_GONE
* - Prevent further transfers to the device
* - Trigger the device's cleanup if it is already closed
* - When the last client closes the device via usbh_dev_close(), free the device object and issue a USBH_HUB_REQ_PORT_RECOVER request
*
* USBH_HUB_EVENT_PORT_DISABLED:
* - A previous USBH_HUB_REQ_PORT_DISABLE has completed.
* - The USBH should free the device object
*/
typedef enum {
USBH_HUB_EVENT_PORT_ERROR, /**< The port has encountered an error (such as a sudden disconnection). The device
connected to that port should be marked gone. */
USBH_HUB_EVENT_PORT_DISABLED, /**< Previous USBH_HUB_REQ_PORT_DISABLE request completed */
} usbh_hub_event_t;
// ---------------------- Callbacks ------------------------
/**
* @brief Callback used to indicate completion of control transfers submitted usbh_dev_submit_ctrl_urb()
* @note This callback is called from within usbh_process()
*/
typedef void (*usbh_ctrl_xfer_cb_t)(usb_device_handle_t dev_hdl, urb_t *urb, void *arg);
/**
* @brief Callback used to indicate that the USBH has an event
*
* @note This callback is called from within usbh_process()
* @note On a USBH_EVENT_DEV_ALL_FREE event, the dev_hdl argument is set to NULL
*/
typedef void (*usbh_event_cb_t)(usb_device_handle_t dev_hdl, usbh_event_t usbh_event, void *arg);
/**
* @brief Callback used by the USBH to request actions from the Hub driver
*
* The Hub Request Callback allows the USBH to request the Hub actions on a particular port. Conversely, the Hub driver
* will indicate completion of some of these requests to the USBH via the usbh_hub_event() funtion.
*/
typedef void (*usbh_hub_req_cb_t)(hcd_port_handle_t port_hdl, usbh_hub_req_t hub_req, void *arg);
// ----------------------- Objects -------------------------
/**
* @brief Configuration for an endpoint being allocated using usbh_ep_alloc()
*/
typedef struct {
const usb_ep_desc_t *ep_desc; /**< Endpoint descriptor */
hcd_pipe_callback_t pipe_cb; /**< Endpoint's pipe callback */
void *pipe_cb_arg; /**< Pipe callback argument */
void *context; /**< Pipe context */
} usbh_ep_config_t;
/**
* @brief USBH configuration used in usbh_install()
*/
typedef struct {
usb_notif_cb_t notif_cb; /**< Notification callback */
void *notif_cb_arg; /**< Notification callback argument */
usbh_ctrl_xfer_cb_t ctrl_xfer_cb; /**< Control transfer callback */
void *ctrl_xfer_cb_arg; /**< Control transfer callback argument */
usbh_event_cb_t event_cb; /**< USBH event callback */
void *event_cb_arg; /**< USBH event callback argument */
hcd_config_t hcd_config; /**< HCD configuration */
} usbh_config_t;
// ------------------------------------------------- USBH Functions ----------------------------------------------------
/**
* @brief Installs the USBH driver
*
* - This function will internally install the HCD
* - This must be called before calling any Hub driver functions
*
* @note Before calling this function, the Host Controller must already be un-clock gated and reset. The USB PHY
* (internal or external, and associated GPIOs) must already be configured.
* @param usbh_config USBH driver configuration
* @return esp_err_t
*/
esp_err_t usbh_install(const usbh_config_t *usbh_config);
/**
* @brief Uninstall the USBH driver
*
* - This function will uninstall the HCD
* - The Hub driver must be uninstalled before calling this function
*
* @note This function will simply free the resources used by the USBH. The underlying Host Controller and USB PHY will
* not be disabled.
* @return esp_err_t
*/
esp_err_t usbh_uninstall(void);
/**
* @brief USBH processing function
*
* - USBH processing function that must be called repeatedly to process USBH events
* - If blocking, the caller can block until a USB_NOTIF_SOURCE_USBH notification is received before running this
* function
*
* @note This function can block
* @return esp_err_t
*/
esp_err_t usbh_process(void);
/**
* @brief Get the current number of devices
*
* @note This function can block
* @param[out] num_devs_ret Current number of devices
* @return esp_err_t
*/
esp_err_t usbh_num_devs(int *num_devs_ret);
// ------------------------------------------------ Device Functions ---------------------------------------------------
// --------------------- Device Pool -----------------------
/**
* @brief Fill list with address of currently connected devices
*
* - This function fills the provided list with the address of current connected devices
* - Device address can then be used in usbh_dev_open()
* - If there are more devices than the list_len, this function will only fill
* up to list_len number of devices.
*
* @param[in] list_len Length of empty list
* @param[inout] dev_addr_list Empty list to be filled
* @param[out] num_dev_ret Number of devices filled into list
* @return esp_err_t
*/
esp_err_t usbh_dev_addr_list_fill(int list_len, uint8_t *dev_addr_list, int *num_dev_ret);
/**
* @brief Open a device by address
*
* A device must be opened before it can be used
*
* @param[in] dev_addr Device address
* @param[out] dev_hdl Device handle
* @return esp_err_t
*/
esp_err_t usbh_dev_open(uint8_t dev_addr, usb_device_handle_t *dev_hdl);
/**
* @brief CLose a device
*
* Device can be opened by calling usbh_dev_open()
*
* @param[in] dev_hdl Device handle
* @return esp_err_t
*/
esp_err_t usbh_dev_close(usb_device_handle_t dev_hdl);
/**
* @brief Mark that all devices should be freed at the next possible opportunity
*
* A device marked as free will not be freed until the last client using the device has called usbh_dev_close()
*
* @return
* - ESP_OK: There were no devices to free to begin with. Current state is all free
* - ESP_ERR_NOT_FINISHED: One or more devices still need to be freed (but have been marked "to be freed")
*/
esp_err_t usbh_dev_mark_all_free(void);
// ------------------- Single Device ----------------------
/**
* @brief Get a device's address
*
* @note Can be called without opening the device
*
* @param[in] dev_hdl Device handle
* @param[out] dev_addr Device's address
* @return esp_err_t
*/
esp_err_t usbh_dev_get_addr(usb_device_handle_t dev_hdl, uint8_t *dev_addr);
/**
* @brief Get a device's information
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[out] dev_info Device information
* @return esp_err_t
*/
esp_err_t usbh_dev_get_info(usb_device_handle_t dev_hdl, usb_device_info_t *dev_info);
/**
* @brief Get a device's device descriptor
*
* - The device descriptor is cached when the device is created by the Hub driver
*
* @param[in] dev_hdl Device handle
* @param[out] dev_desc_ret Device descriptor
* @return esp_err_t
*/
esp_err_t usbh_dev_get_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t **dev_desc_ret);
/**
* @brief Get a device's active configuration descriptor
*
* Simply returns a reference to the internally cached configuration descriptor
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param config_desc_ret
* @return esp_err_t
*/
esp_err_t usbh_dev_get_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t **config_desc_ret);
/**
* @brief Submit a control transfer (URB) to a device
*
* @param[in] dev_hdl Device handle
* @param[in] urb URB
* @return esp_err_t
*/
esp_err_t usbh_dev_submit_ctrl_urb(usb_device_handle_t dev_hdl, urb_t *urb);
// ----------------------------------------------- Endpoint Functions -------------------------------------------------
/**
* @brief Allocate an endpoint on a device
*
* Clients that have opened a device must call this function to allocate all endpoints in an interface that is claimed.
* The pipe handle of the endpoint is returned so that clients can use and control the pipe directly.
*
* @note This function can block
* @note Default pipes are owned by the USBH. For control transfers, use usbh_dev_submit_ctrl_urb() instead
* @note Device must be opened by the client first
*
* @param[in] dev_hdl Device handle
* @param[in] ep_config
* @param[out] pipe_hdl_ret Pipe handle
* @return esp_err_t
*/
esp_err_t usbh_ep_alloc(usb_device_handle_t dev_hdl, usbh_ep_config_t *ep_config, hcd_pipe_handle_t *pipe_hdl_ret);
/**
* @brief Free and endpoint on a device
*
* Free an endpoint previously opened by usbh_ep_alloc()
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[in] bEndpointAddress Endpoint's address
* @return esp_err_t
*/
esp_err_t usbh_ep_free(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress);
/**
* @brief Get the context of an endpoint
*
* Get the context variable assigned to and endpoint on allocation.
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[in] bEndpointAddress Endpoint's address
* @param[out] context_ret Context variable
* @return esp_err_t
*/
esp_err_t usbh_ep_get_context(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress, void **context_ret);
// -------------------------------------------------- Hub Functions ----------------------------------------------------
// ------------------- Device Related ----------------------
/**
* @brief Indicates to USBH that the Hub driver is installed
*
* - The Hub driver must call this function in its installation to indicate the the USBH that it has been installed.
* - This should only be called after the USBH has already be installed
*
* @note Hub Driver only
* @param[in] hub_req_callback Hub request callback
* @param[in] callback_arg Callback argument
* @return esp_err_t
*/
esp_err_t usbh_hub_is_installed(usbh_hub_req_cb_t hub_req_callback, void *callback_arg);
/**
* @brief Indicates to USBH the start of enumeration for a device
*
* - The Hub driver calls this function before it starts enumerating a new device.
* - The USBH will allocate a new device that will be initialized by the Hub driver using the remaining hub enumeration
* functions.
* - The new device's default pipe handle is returned to all the Hub driver to be used during enumeration.
*
* @note Hub Driver only
* @param[in] port_hdl Handle of the port that the device is connected to
* @param[in] dev_speed Device's speed
* @param[out] new_dev_hdl Device's handle
* @param[out] default_pipe_hdl Device's default pipe handle
* @return esp_err_t
*/
esp_err_t usbh_hub_add_dev(hcd_port_handle_t port_hdl, usb_speed_t dev_speed, usb_device_handle_t *new_dev_hdl, hcd_pipe_handle_t *default_pipe_hdl);
/**
* @brief Indicates to the USBH that a hub event has occurred for a particular device
*
* @param dev_hdl Device handle
* @param hub_event Hub event
* @return esp_err_t
*/
esp_err_t usbh_hub_pass_event(usb_device_handle_t dev_hdl, usbh_hub_event_t hub_event);
// ----------------- Enumeration Related -------------------
/**
* @brief Assign the enumerating device's address
*
* @note Hub Driver only
* @note Must call in sequence
* @param[in] dev_hdl Device handle
* @param dev_addr
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_fill_dev_addr(usb_device_handle_t dev_hdl, uint8_t dev_addr);
/**
* @brief Fill the enumerating device's descriptor
*
* @note Hub Driver only
* @note Must call in sequence
* @param[in] dev_hdl Device handle
* @param device_desc
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_fill_dev_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t *device_desc);
/**
* @brief Fill the enumerating device's active configuration descriptor
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @param config_desc_full
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_fill_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t *config_desc_full);
/**
* @brief Fill one of the string descriptors of the enumerating device
*
* @note Hub Driver only
* @note Must call in sequence
* @param dev_hdl Device handle
* @param str_desc Pointer to string descriptor
* @param select Select which string descriptor. 0/1/2 for Manufacturer/Product/Serial Number string descriptors respecitvely
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_fill_str_desc(usb_device_handle_t dev_hdl, const usb_str_desc_t *str_desc, int select);
/**
* @brief Indicate the device enumeration is completed
*
* This will all the device to be opened by clients, and also trigger a USBH_EVENT_DEV_NEW event.
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_done(usb_device_handle_t dev_hdl);
/**
* @brief Indicate that device enumeration has failed
*
* This will cause the enumerating device's resources to be cleaned up
* The Hub Driver must guarantee that the enumerating device's default pipe is already halted, flushed, and dequeued.
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @return esp_err_t
*/
esp_err_t usbh_hub_enum_failed(usb_device_handle_t dev_hdl);
#ifdef __cplusplus
}
#endif