/* * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #include "sdkconfig.h" #include #include #include #include "freertos/FreeRTOS.h" #include "freertos/portmacro.h" #include "esp_err.h" #include "esp_heap_caps.h" #include "esp_log.h" #include "usb_private.h" #include "hcd.h" #include "hub.h" #include "usb/usb_helpers.h" /* Implementation of the HUB driver that only supports the Root Hub with a single port. Therefore, we currently don't implement the bare minimum to control the root HCD port. */ #define HUB_ROOT_PORT_NUM 1 // HCD only supports one port #ifdef CONFIG_USB_HOST_HW_BUFFER_BIAS_IN #define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_RX #elif CONFIG_USB_HOST_HW_BUFFER_BIAS_PERIODIC_OUT #define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_PTX #else // CONFIG_USB_HOST_HW_BUFFER_BIAS_BALANCED #define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_BALANCED #endif #define SET_ADDR_RECOVERY_INTERVAL_MS CONFIG_USB_HOST_SET_ADDR_RECOVERY_MS #define ENUM_CTRL_TRANSFER_MAX_DATA_LEN CONFIG_USB_HOST_CONTROL_TRANSFER_MAX_SIZE #define ENUM_DEV_ADDR 1 // Device address used in enumeration #define ENUM_CONFIG_INDEX 0 // Index used to get the first configuration descriptor of the device #define ENUM_SHORT_DESC_REQ_LEN 8 // Number of bytes to request when getting a short descriptor (just enough to get bMaxPacketSize0 or wTotalLength) #define ENUM_WORST_CASE_MPS_LS 8 // The worst case MPS of EP0 for a LS device #define ENUM_WORST_CASE_MPS_FS 64 // The worst case MPS of EP0 for a FS device #define ENUM_LOW_SPEED_MPS 8 // Worst case MPS for the default endpoint of a low-speed device #define ENUM_FULL_SPEED_MPS 64 // Worst case MPS for the default endpoint of a full-speed device #define ENUM_LANGID 0x409 // Current enumeration only supports English (United States) string descriptors // Hub driver action flags. LISTED IN THE ORDER THEY SHOULD BE HANDLED IN within hub_process(). Some actions are mutually exclusive #define HUB_DRIVER_FLAG_ACTION_ROOT_EVENT 0x01 #define HUB_DRIVER_FLAG_ACTION_PORT_DISABLE 0x02 #define HUB_DRIVER_FLAG_ACTION_PORT_RECOVER 0x04 #define HUB_DRIVER_FLAG_ACTION_ENUM_EVENT 0x08 /** * @brief Hub driver states * * These states represent a Hub driver that only has a single port (the root port) */ typedef enum { HUB_DRIVER_STATE_INSTALLED, /**< Hub driver is installed. Root port is not powered */ HUB_DRIVER_STATE_ROOT_POWERED, /**< Root port is powered, is not connected */ HUB_DRIVER_STATE_ROOT_ENUM, /**< A device has connected to the root port and is undergoing enumeration */ HUB_DRIVER_STATE_ROOT_ENUM_FAILED, /**< Enumeration of a connect device has failed. Waiting for that device to disconnect */ HUB_DRIVER_STATE_ROOT_ACTIVE, /**< The connected device is enumerated */ HUB_DRIVER_STATE_ROOT_RECOVERY, /**< Root port encountered an error and needs to be recovered */ } hub_driver_state_t; /** * @brief Stages of device enumeration listed in their order of execution * * - These stages MUST BE LISTED IN THE ORDER OF THEIR EXECUTION as the enumeration will simply increment the current stage * - If an error occurs at any stage, ENUM_STAGE_CLEANUP_FAILED acts as a common exit stage on failure * - Must start with 0 as enum is also used as an index * - The short descriptor stages are used to fetch the start particular descriptors that don't have a fixed length in order to determine the full descriptors length */ typedef enum { ENUM_STAGE_NONE = 0, /**< There is no device awaiting enumeration. Start requires device connection and first reset. */ ENUM_STAGE_START, /**< A device has connected and has already been reset once. Allocate a device object in USBH */ // Basic device enumeration ENUM_STAGE_GET_SHORT_DEV_DESC, /**< Getting short dev desc (wLength is ENUM_SHORT_DESC_REQ_LEN) */ ENUM_STAGE_CHECK_SHORT_DEV_DESC, /**< Save bMaxPacketSize0 from the short dev desc. Update the MPS of the enum pipe */ ENUM_STAGE_SECOND_RESET, /**< Reset the device again (Workaround for old USB devices that get confused by the previous short dev desc request). */ ENUM_STAGE_SET_ADDR, /**< Send SET_ADDRESS request */ ENUM_STAGE_CHECK_ADDR, /**< Update the enum pipe's target address */ ENUM_STAGE_SET_ADDR_RECOVERY, /**< Wait SET ADDRESS recovery interval at least for 2ms due to usb_20, chapter 9.2.6.3 */ ENUM_STAGE_GET_FULL_DEV_DESC, /**< Get the full dev desc */ ENUM_STAGE_CHECK_FULL_DEV_DESC, /**< Check the full dev desc, fill it into the device object in USBH. Save the string descriptor indexes*/ ENUM_STAGE_GET_SHORT_CONFIG_DESC, /**< Getting a short config desc (wLength is ENUM_SHORT_DESC_REQ_LEN) */ ENUM_STAGE_CHECK_SHORT_CONFIG_DESC, /**< Save wTotalLength of the short config desc */ ENUM_STAGE_GET_FULL_CONFIG_DESC, /**< Get the full config desc (wLength is the saved wTotalLength) */ ENUM_STAGE_CHECK_FULL_CONFIG_DESC, /**< Check the full config desc, fill it into the device object in USBH */ ENUM_STAGE_SET_CONFIG, /**< Send SET_CONFIGURATION request */ ENUM_STAGE_CHECK_CONFIG, /**< Check that SET_CONFIGURATION request was successful */ // Get string descriptors ENUM_STAGE_GET_SHORT_LANGID_TABLE, /**< Get the header of the LANGID table string descriptor */ ENUM_STAGE_CHECK_SHORT_LANGID_TABLE, /**< Save the bLength of the LANGID table string descriptor */ ENUM_STAGE_GET_FULL_LANGID_TABLE, /**< Get the full LANGID table string descriptor */ ENUM_STAGE_CHECK_FULL_LANGID_TABLE, /**< Check whether ENUM_LANGID is in the LANGID table */ ENUM_STAGE_GET_SHORT_MANU_STR_DESC, /**< Get the header of the iManufacturer string descriptor */ ENUM_STAGE_CHECK_SHORT_MANU_STR_DESC, /**< Save the bLength of the iManufacturer string descriptor */ ENUM_STAGE_GET_FULL_MANU_STR_DESC, /**< Get the full iManufacturer string descriptor */ ENUM_STAGE_CHECK_FULL_MANU_STR_DESC, /**< Check and fill the full iManufacturer string descriptor */ ENUM_STAGE_GET_SHORT_PROD_STR_DESC, /**< Get the header of the string descriptor at index iProduct */ ENUM_STAGE_CHECK_SHORT_PROD_STR_DESC, /**< Save the bLength of the iProduct string descriptor */ ENUM_STAGE_GET_FULL_PROD_STR_DESC, /**< Get the full iProduct string descriptor */ ENUM_STAGE_CHECK_FULL_PROD_STR_DESC, /**< Check and fill the full iProduct string descriptor */ ENUM_STAGE_GET_SHORT_SER_STR_DESC, /**< Get the header of the string descriptor at index iSerialNumber */ ENUM_STAGE_CHECK_SHORT_SER_STR_DESC, /**< Save the bLength of the iSerialNumber string descriptor */ ENUM_STAGE_GET_FULL_SER_STR_DESC, /**< Get the full iSerialNumber string descriptor */ ENUM_STAGE_CHECK_FULL_SER_STR_DESC, /**< Check and fill the full iSerialNumber string descriptor */ // Cleanup ENUM_STAGE_CLEANUP, /**< Clean up after successful enumeration. Adds enumerated device to USBH */ ENUM_STAGE_CLEANUP_FAILED, /**< Cleanup failed enumeration. Free device resources */ } enum_stage_t; const char *const enum_stage_strings[] = { "NONE", "START", "GET_SHORT_DEV_DESC", "CHECK_SHORT_DEV_DESC", "SECOND_RESET", "SET_ADDR", "CHECK_ADDR", "SET_ADDR_RECOVERY", "GET_FULL_DEV_DESC", "CHECK_FULL_DEV_DESC", "GET_SHORT_CONFIG_DESC", "CHECK_SHORT_CONFIG_DESC", "GET_FULL_CONFIG_DESC", "CHECK_FULL_CONFIG_DESC", "SET_CONFIG", "CHECK_CONFIG", "GET_SHORT_LANGID_TABLE", "CHECK_SHORT_LANGID_TABLE", "GET_FULL_LANGID_TABLE", "CHECK_FULL_LANGID_TABLE", "GET_SHORT_MANU_STR_DESC", "CHECK_SHORT_MANU_STR_DESC", "GET_FULL_MANU_STR_DESC", "CHECK_FULL_MANU_STR_DESC", "GET_SHORT_PROD_STR_DESC", "CHECK_SHORT_PROD_STR_DESC", "GET_FULL_PROD_STR_DESC", "CHECK_FULL_PROD_STR_DESC", "GET_SHORT_SER_STR_DESC", "CHECK_SHORT_SER_STR_DESC", "GET_FULL_SER_STR_DESC", "CHECK_FULL_SER_STR_DESC", "CLEANUP", "CLEANUP_FAILED", }; typedef struct { // Constant urb_t *urb; /**< URB used for enumeration control transfers. Max data length of ENUM_CTRL_TRANSFER_MAX_DATA_LEN */ // Initialized at start of a particular enumeration usb_device_handle_t dev_hdl; /**< Handle of device being enumerated */ hcd_pipe_handle_t pipe; /**< Default pipe handle of the device being enumerated */ // Updated during enumeration enum_stage_t stage; /**< Current enumeration stage */ int expect_num_bytes; /**< Expected number of bytes for IN transfers stages. Set to 0 for OUT transfer */ uint8_t bMaxPacketSize0; /**< Max packet size of the device's EP0. Read from bMaxPacketSize0 field of device descriptor */ uint16_t wTotalLength; /**< Total length of device's configuration descriptor. Read from wTotalLength field of config descriptor */ uint8_t iManufacturer; /**< Index of the Manufacturer string descriptor */ uint8_t iProduct; /**< Index of the Product string descriptor */ uint8_t iSerialNumber; /**< Index of the Serial Number string descriptor */ uint8_t str_desc_bLength; /**< Saved bLength from getting a short string descriptor */ uint8_t bConfigurationValue; /**< Device's current configuration number */ } enum_ctrl_t; typedef struct { // Dynamic members require a critical section struct { union { struct { uint32_t actions: 8; uint32_t reserved24: 24; }; uint32_t val; } flags; hub_driver_state_t driver_state; } dynamic; // Single thread members don't require a critical section so long as they are never accessed from multiple threads struct { usb_device_handle_t root_dev_hdl; // Indicates if an enumerated device is connected to the root port enum_ctrl_t enum_ctrl; } single_thread; // Constant members do no change after installation thus do not require a critical section struct { hcd_port_handle_t root_port_hdl; usb_proc_req_cb_t proc_req_cb; void *proc_req_cb_arg; } constant; } hub_driver_t; static hub_driver_t *p_hub_driver_obj = NULL; static portMUX_TYPE hub_driver_lock = portMUX_INITIALIZER_UNLOCKED; const char *HUB_DRIVER_TAG = "HUB"; #define HUB_DRIVER_ENTER_CRITICAL_ISR() portENTER_CRITICAL_ISR(&hub_driver_lock) #define HUB_DRIVER_EXIT_CRITICAL_ISR() portEXIT_CRITICAL_ISR(&hub_driver_lock) #define HUB_DRIVER_ENTER_CRITICAL() portENTER_CRITICAL(&hub_driver_lock) #define HUB_DRIVER_EXIT_CRITICAL() portEXIT_CRITICAL(&hub_driver_lock) #define HUB_DRIVER_ENTER_CRITICAL_SAFE() portENTER_CRITICAL_SAFE(&hub_driver_lock) #define HUB_DRIVER_EXIT_CRITICAL_SAFE() portEXIT_CRITICAL_SAFE(&hub_driver_lock) #define HUB_DRIVER_CHECK(cond, ret_val) ({ \ if (!(cond)) { \ return (ret_val); \ } \ }) #define HUB_DRIVER_CHECK_FROM_CRIT(cond, ret_val) ({ \ if (!(cond)) { \ HUB_DRIVER_EXIT_CRITICAL(); \ return ret_val; \ } \ }) // ------------------------------------------------- Forward Declare --------------------------------------------------- /** * @brief HCD port callback for the root port * * - This callback is called from the context of the HCD, so any event handling should be deferred to hub_process() * - Under the current HCD implementation, this callback should only be ever be called in an ISR * - This callback needs to call proc_req_cb to ensure that hub_process() gets a chance to run * * @param port_hdl HCD port handle * @param port_event HCD port event * @param user_arg Callback argument * @param in_isr Whether callback is in an ISR context * @return Whether a yield is required */ static bool root_port_callback(hcd_port_handle_t port_hdl, hcd_port_event_t port_event, void *user_arg, bool in_isr); /** * @brief HCD pipe callback for the default pipe of the device under enumeration * * - This callback is called from the context of the HCD, so any event handling should be deferred to hub_process() * - This callback needs to call proc_req_cb to ensure that hub_process() gets a chance to run * * @param pipe_hdl HCD pipe handle * @param pipe_event Pipe event * @param user_arg Callback argument * @param in_isr Whether callback is in an ISR context * @return Whether a yield is required */ static bool enum_dflt_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr); /** * @brief USBH Hub driver request callback * * - This callback is called from the context of the USBH, so so any event handling should be deferred to hub_process() * - This callback needs to call proc_req_cb to ensure that hub_process() gets a chance to run * * @param port_hdl HCD port handle * @param hub_req Hub driver request * @param arg Callback argument */ static void usbh_hub_req_callback(hcd_port_handle_t port_hdl, usbh_hub_req_t hub_req, void *arg); // ------------------------------------------------- Enum Functions ---------------------------------------------------- static bool enum_stage_start(enum_ctrl_t *enum_ctrl) { // Get the speed of the device, and set the enum MPS to the worst case size for now usb_speed_t speed; if (hcd_port_get_speed(p_hub_driver_obj->constant.root_port_hdl, &speed) != ESP_OK) { return false; } enum_ctrl->bMaxPacketSize0 = (speed == USB_SPEED_LOW) ? ENUM_WORST_CASE_MPS_LS : ENUM_WORST_CASE_MPS_FS; // Try to add the device to USBH usb_device_handle_t enum_dev_hdl; hcd_pipe_handle_t enum_dflt_pipe_hdl; // We use NULL as the parent device to indicate the Root Hub port 1. We currently only support a single device if (usbh_hub_add_dev(p_hub_driver_obj->constant.root_port_hdl, speed, &enum_dev_hdl, &enum_dflt_pipe_hdl) != ESP_OK) { return false; } // Set our own default pipe callback ESP_ERROR_CHECK(hcd_pipe_update_callback(enum_dflt_pipe_hdl, enum_dflt_pipe_callback, NULL)); enum_ctrl->dev_hdl = enum_dev_hdl; enum_ctrl->pipe = enum_dflt_pipe_hdl; return true; } static bool enum_stage_second_reset(enum_ctrl_t *enum_ctrl) { ESP_ERROR_CHECK(hcd_pipe_set_persist_reset(enum_ctrl->pipe)); // Persist the default pipe through the reset if (hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_RESET) != ESP_OK) { ESP_LOGE(HUB_DRIVER_TAG, "Failed to issue second reset"); return false; } return true; } static void get_string_desc_index_and_langid(enum_ctrl_t *enum_ctrl, uint8_t *index, uint16_t *langid) { switch (enum_ctrl->stage) { case ENUM_STAGE_GET_SHORT_LANGID_TABLE: case ENUM_STAGE_GET_FULL_LANGID_TABLE: *index = 0; // The LANGID table uses an index of 0 *langid = 0; // Getting the LANGID table itself should use a LANGID of 0 break; case ENUM_STAGE_GET_SHORT_MANU_STR_DESC: case ENUM_STAGE_GET_FULL_MANU_STR_DESC: *index = enum_ctrl->iManufacturer; *langid = ENUM_LANGID; // Use the default LANGID break; case ENUM_STAGE_GET_SHORT_PROD_STR_DESC: case ENUM_STAGE_GET_FULL_PROD_STR_DESC: *index = enum_ctrl->iProduct; *langid = ENUM_LANGID; // Use the default LANGID break; case ENUM_STAGE_GET_SHORT_SER_STR_DESC: case ENUM_STAGE_GET_FULL_SER_STR_DESC: *index = enum_ctrl->iSerialNumber; *langid = ENUM_LANGID; // Use the default LANGID break; default: // Should not occur abort(); break; } } static bool enum_stage_transfer(enum_ctrl_t *enum_ctrl) { usb_transfer_t *transfer = &enum_ctrl->urb->transfer; switch (enum_ctrl->stage) { case ENUM_STAGE_GET_SHORT_DEV_DESC: { // Initialize a short device descriptor request USB_SETUP_PACKET_INIT_GET_DEVICE_DESC((usb_setup_packet_t *)transfer->data_buffer); ((usb_setup_packet_t *)transfer->data_buffer)->wLength = ENUM_SHORT_DESC_REQ_LEN; transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(ENUM_SHORT_DESC_REQ_LEN, enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly ENUM_SHORT_DESC_REQ_LEN bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + ENUM_SHORT_DESC_REQ_LEN; break; } case ENUM_STAGE_SET_ADDR: { USB_SETUP_PACKET_INIT_SET_ADDR((usb_setup_packet_t *)transfer->data_buffer, ENUM_DEV_ADDR); transfer->num_bytes = sizeof(usb_setup_packet_t); // No data stage enum_ctrl->expect_num_bytes = 0; // OUT transfer. No need to check number of bytes returned break; } case ENUM_STAGE_GET_FULL_DEV_DESC: { USB_SETUP_PACKET_INIT_GET_DEVICE_DESC((usb_setup_packet_t *)transfer->data_buffer); transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(sizeof(usb_device_desc_t), enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly sizeof(usb_device_desc_t) bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + sizeof(usb_device_desc_t); break; } case ENUM_STAGE_GET_SHORT_CONFIG_DESC: { // Get a short config descriptor at index 0 USB_SETUP_PACKET_INIT_GET_CONFIG_DESC((usb_setup_packet_t *)transfer->data_buffer, ENUM_CONFIG_INDEX, ENUM_SHORT_DESC_REQ_LEN); transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(ENUM_SHORT_DESC_REQ_LEN, enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly ENUM_SHORT_DESC_REQ_LEN bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + ENUM_SHORT_DESC_REQ_LEN; break; } case ENUM_STAGE_GET_FULL_CONFIG_DESC: { // Get the full configuration descriptor at index 0, requesting its exact length. USB_SETUP_PACKET_INIT_GET_CONFIG_DESC((usb_setup_packet_t *)transfer->data_buffer, ENUM_CONFIG_INDEX, enum_ctrl->wTotalLength); transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(enum_ctrl->wTotalLength, enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly wTotalLength bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + enum_ctrl->wTotalLength; break; } case ENUM_STAGE_SET_CONFIG: { USB_SETUP_PACKET_INIT_SET_CONFIG((usb_setup_packet_t *)transfer->data_buffer, enum_ctrl->bConfigurationValue); transfer->num_bytes = sizeof(usb_setup_packet_t); // No data stage enum_ctrl->expect_num_bytes = 0; // OUT transfer. No need to check number of bytes returned break; } case ENUM_STAGE_GET_SHORT_LANGID_TABLE: case ENUM_STAGE_GET_SHORT_MANU_STR_DESC: case ENUM_STAGE_GET_SHORT_PROD_STR_DESC: case ENUM_STAGE_GET_SHORT_SER_STR_DESC: { uint8_t index; uint16_t langid; get_string_desc_index_and_langid(enum_ctrl, &index, &langid); // Get only the header of the string descriptor USB_SETUP_PACKET_INIT_GET_STR_DESC((usb_setup_packet_t *)transfer->data_buffer, index, langid, sizeof(usb_str_desc_t)); transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(sizeof(usb_str_desc_t), enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly sizeof(usb_str_desc_t) bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + sizeof(usb_str_desc_t); break; } case ENUM_STAGE_GET_FULL_LANGID_TABLE: case ENUM_STAGE_GET_FULL_MANU_STR_DESC: case ENUM_STAGE_GET_FULL_PROD_STR_DESC: case ENUM_STAGE_GET_FULL_SER_STR_DESC: { uint8_t index; uint16_t langid; get_string_desc_index_and_langid(enum_ctrl, &index, &langid); // Get the full string descriptor at a particular index, requesting the descriptors exact length USB_SETUP_PACKET_INIT_GET_STR_DESC((usb_setup_packet_t *)transfer->data_buffer, index, langid, enum_ctrl->str_desc_bLength); transfer->num_bytes = sizeof(usb_setup_packet_t) + usb_round_up_to_mps(enum_ctrl->str_desc_bLength, enum_ctrl->bMaxPacketSize0); // IN data stage should return exactly str_desc_bLength bytes enum_ctrl->expect_num_bytes = sizeof(usb_setup_packet_t) + enum_ctrl->str_desc_bLength; break; } default: // Should never occur abort(); break; } if (hcd_urb_enqueue(enum_ctrl->pipe, enum_ctrl->urb) != ESP_OK) { ESP_LOGE(HUB_DRIVER_TAG, "Failed to submit: %s", enum_stage_strings[enum_ctrl->stage]); return false; } return true; } static bool enum_stage_wait(enum_ctrl_t *enum_ctrl) { switch (enum_ctrl->stage) { case ENUM_STAGE_SET_ADDR_RECOVERY: { vTaskDelay(pdMS_TO_TICKS(SET_ADDR_RECOVERY_INTERVAL_MS)); // Need a short delay before device is ready. Todo: IDF-7007 return true; } default: // Should never occur abort(); break; } return false; } static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl) { // Dequeue the URB urb_t *dequeued_enum_urb = hcd_urb_dequeue(enum_ctrl->pipe); assert(dequeued_enum_urb == enum_ctrl->urb); // Check transfer status usb_transfer_t *transfer = &dequeued_enum_urb->transfer; if (transfer->status != USB_TRANSFER_STATUS_COMPLETED) { ESP_LOGE(HUB_DRIVER_TAG, "Bad transfer status %d: %s", transfer->status, enum_stage_strings[enum_ctrl->stage]); if (transfer->status == USB_TRANSFER_STATUS_STALL) { // EP stalled, clearing the pipe to execute further stages ESP_ERROR_CHECK(hcd_pipe_command(enum_ctrl->pipe, HCD_PIPE_CMD_CLEAR)); } return false; } // Check IN transfer returned the expected correct number of bytes if (enum_ctrl->expect_num_bytes != 0 && transfer->actual_num_bytes != enum_ctrl->expect_num_bytes) { if (transfer->actual_num_bytes > enum_ctrl->expect_num_bytes) { // The device returned more bytes than requested. // This violates the USB specs chapter 9.3.5, but we can continue ESP_LOGW(HUB_DRIVER_TAG, "Incorrect number of bytes returned %d: %s", transfer->actual_num_bytes, enum_stage_strings[enum_ctrl->stage]); } else { // The device returned less bytes than requested. We cannot continue. ESP_LOGE(HUB_DRIVER_TAG, "Incorrect number of bytes returned %d: %s", transfer->actual_num_bytes, enum_stage_strings[enum_ctrl->stage]); return false; } } // Stage specific checks and updates bool ret; switch (enum_ctrl->stage) { case ENUM_STAGE_CHECK_SHORT_DEV_DESC: { const usb_device_desc_t *device_desc = (usb_device_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); // Check if the returned descriptor is corrupted if (device_desc->bDescriptorType != USB_B_DESCRIPTOR_TYPE_DEVICE) { ESP_LOGE(HUB_DRIVER_TAG, "Short dev desc corrupt"); ret = false; break; } // Update and save the MPS of the default pipe if (hcd_pipe_update_mps(enum_ctrl->pipe, device_desc->bMaxPacketSize0) != ESP_OK) { ESP_LOGE(HUB_DRIVER_TAG, "Failed to update MPS"); ret = false; break; } // Save the actual MPS of EP0 enum_ctrl->bMaxPacketSize0 = device_desc->bMaxPacketSize0; ret = true; break; } case ENUM_STAGE_CHECK_ADDR: { // Update the pipe and device's address, and fill the address into the device object ESP_ERROR_CHECK(hcd_pipe_update_dev_addr(enum_ctrl->pipe, ENUM_DEV_ADDR)); ESP_ERROR_CHECK(usbh_hub_enum_fill_dev_addr(enum_ctrl->dev_hdl, ENUM_DEV_ADDR)); ret = true; break; } case ENUM_STAGE_CHECK_FULL_DEV_DESC: { // Fill device descriptor into the device object const usb_device_desc_t *device_desc = (const usb_device_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); ESP_ERROR_CHECK(usbh_hub_enum_fill_dev_desc(enum_ctrl->dev_hdl, device_desc)); enum_ctrl->iManufacturer = device_desc->iManufacturer; enum_ctrl->iProduct = device_desc->iProduct; enum_ctrl->iSerialNumber = device_desc->iSerialNumber; ret = true; break; } case ENUM_STAGE_CHECK_SHORT_CONFIG_DESC: { const usb_config_desc_t *config_desc = (usb_config_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); // Check if the returned descriptor is corrupted if (config_desc->bDescriptorType != USB_B_DESCRIPTOR_TYPE_CONFIGURATION) { ESP_LOGE(HUB_DRIVER_TAG, "Short config desc corrupt"); ret = false; break; } #if (ENUM_CTRL_TRANSFER_MAX_DATA_LEN < UINT16_MAX) // Suppress -Wtype-limits warning due to uint16_t wTotalLength // Check if the descriptor is too long to be supported if (config_desc->wTotalLength > ENUM_CTRL_TRANSFER_MAX_DATA_LEN) { ESP_LOGE(HUB_DRIVER_TAG, "Configuration descriptor larger than control transfer max length"); ret = false; break; } #endif // Save the configuration descriptors full length enum_ctrl->wTotalLength = config_desc->wTotalLength; ret = true; break; } case ENUM_STAGE_CHECK_FULL_CONFIG_DESC: { // Fill configuration descriptor into the device object const usb_config_desc_t *config_desc = (usb_config_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); enum_ctrl->bConfigurationValue = config_desc->bConfigurationValue; ESP_ERROR_CHECK(usbh_hub_enum_fill_config_desc(enum_ctrl->dev_hdl, config_desc)); ret = true; break; } case ENUM_STAGE_CHECK_CONFIG: { ret = true; // Nothing to do break; } case ENUM_STAGE_CHECK_SHORT_LANGID_TABLE: case ENUM_STAGE_CHECK_SHORT_MANU_STR_DESC: case ENUM_STAGE_CHECK_SHORT_PROD_STR_DESC: case ENUM_STAGE_CHECK_SHORT_SER_STR_DESC: { const usb_str_desc_t *str_desc = (usb_str_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); // Check if the returned descriptor is supported or corrupted if (str_desc->bDescriptorType == 0) { ESP_LOGW(HUB_DRIVER_TAG, "String desc not supported"); ret = false; break; } else if (str_desc->bDescriptorType != USB_B_DESCRIPTOR_TYPE_STRING) { ESP_LOGE(HUB_DRIVER_TAG, "Full string desc corrupt"); ret = false; break; } #if (ENUM_CTRL_TRANSFER_MAX_DATA_LEN < UINT8_MAX) // Suppress -Wtype-limits warning due to uint8_t bLength // Check if the descriptor is too long to be supported if (str_desc->bLength > (uint32_t)ENUM_CTRL_TRANSFER_MAX_DATA_LEN) { ESP_LOGE(HUB_DRIVER_TAG, "String descriptor larger than control transfer max length"); ret = false; break; } #endif // Save the descriptors full length enum_ctrl->str_desc_bLength = str_desc->bLength; ret = true; break; } case ENUM_STAGE_CHECK_FULL_LANGID_TABLE: case ENUM_STAGE_CHECK_FULL_MANU_STR_DESC: case ENUM_STAGE_CHECK_FULL_PROD_STR_DESC: case ENUM_STAGE_CHECK_FULL_SER_STR_DESC: { const usb_str_desc_t *str_desc = (usb_str_desc_t *)(transfer->data_buffer + sizeof(usb_setup_packet_t)); // Check if the returned descriptor is supported or corrupted if (str_desc->bDescriptorType == 0) { ESP_LOGW(HUB_DRIVER_TAG, "String desc not supported"); ret = false; break; } else if (str_desc->bDescriptorType != USB_B_DESCRIPTOR_TYPE_STRING) { ESP_LOGE(HUB_DRIVER_TAG, "Full string desc corrupt"); ret = false; break; } if (enum_ctrl->stage == ENUM_STAGE_CHECK_FULL_LANGID_TABLE) { // Scan the LANGID table for our target LANGID bool target_langid_found = false; int langid_table_num_entries = (str_desc->bLength - sizeof(usb_str_desc_t)) / 2; // Each LANGID is 2 bytes for (int i = 0; i < langid_table_num_entries; i++) { // Each LANGID is 2 bytes if (str_desc->wData[i] == ENUM_LANGID) { target_langid_found = true; break; } } if (!target_langid_found) { ESP_LOGE(HUB_DRIVER_TAG, "LANGID 0x%x not found", ENUM_LANGID); } ret = target_langid_found; break; } else { // Fill the string descriptor into the device object int select; if (enum_ctrl->stage == ENUM_STAGE_CHECK_FULL_MANU_STR_DESC) { select = 0; } else if (enum_ctrl->stage == ENUM_STAGE_CHECK_FULL_PROD_STR_DESC) { select = 1; } else { // ENUM_STAGE_CHECK_FULL_PROD_STR_DESC select = 2; } ESP_ERROR_CHECK(usbh_hub_enum_fill_str_desc(enum_ctrl->dev_hdl, str_desc, select)); ret = true; break; } } default: // Should never occur ret = false; abort(); break; } return ret; } static void enum_stage_cleanup(enum_ctrl_t *enum_ctrl) { // We currently only support a single device connected to the root port. Move the device handle from enum to root HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_ACTIVE; HUB_DRIVER_EXIT_CRITICAL(); p_hub_driver_obj->single_thread.root_dev_hdl = enum_ctrl->dev_hdl; usb_device_handle_t dev_hdl = enum_ctrl->dev_hdl; // Clear values in enum_ctrl enum_ctrl->dev_hdl = NULL; enum_ctrl->pipe = NULL; // Update device object after enumeration is done ESP_ERROR_CHECK(usbh_hub_enum_done(dev_hdl)); } static void enum_stage_cleanup_failed(enum_ctrl_t *enum_ctrl) { // Enumeration failed. Clear the enum device handle and pipe if (enum_ctrl->dev_hdl) { // If enumeration failed due to a port event, we need to Halt, flush, and dequeue enum default pipe in case there // was an in-flight URB. ESP_ERROR_CHECK(hcd_pipe_command(enum_ctrl->pipe, HCD_PIPE_CMD_HALT)); ESP_ERROR_CHECK(hcd_pipe_command(enum_ctrl->pipe, HCD_PIPE_CMD_FLUSH)); hcd_urb_dequeue(enum_ctrl->pipe); // This could return NULL if there ESP_ERROR_CHECK(usbh_hub_enum_failed(enum_ctrl->dev_hdl)); // Free the underlying device object first before recovering the port } // Clear values in enum_ctrl enum_ctrl->dev_hdl = NULL; enum_ctrl->pipe = NULL; HUB_DRIVER_ENTER_CRITICAL(); // Enum could have failed due to a port error. If so, we need to trigger a port recovery if (p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_ROOT_RECOVERY) { p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_RECOVER; } else { // Otherwise, we move to the enum failed state and wait for the device to disconnect p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_ENUM_FAILED; } HUB_DRIVER_EXIT_CRITICAL(); } static enum_stage_t get_next_stage(enum_stage_t old_stage, enum_ctrl_t *enum_ctrl) { enum_stage_t new_stage = old_stage + 1; // Skip the GET_DESCRIPTOR string type corresponding stages if a particular index is 0. while (((new_stage == ENUM_STAGE_GET_SHORT_MANU_STR_DESC || new_stage == ENUM_STAGE_CHECK_SHORT_MANU_STR_DESC || new_stage == ENUM_STAGE_GET_FULL_MANU_STR_DESC || new_stage == ENUM_STAGE_CHECK_FULL_MANU_STR_DESC) && enum_ctrl->iManufacturer == 0) || ((new_stage == ENUM_STAGE_GET_SHORT_PROD_STR_DESC || new_stage == ENUM_STAGE_CHECK_SHORT_PROD_STR_DESC || new_stage == ENUM_STAGE_GET_FULL_PROD_STR_DESC || new_stage == ENUM_STAGE_CHECK_FULL_PROD_STR_DESC) && enum_ctrl->iProduct == 0) || ((new_stage == ENUM_STAGE_GET_SHORT_SER_STR_DESC || new_stage == ENUM_STAGE_CHECK_SHORT_SER_STR_DESC || new_stage == ENUM_STAGE_GET_FULL_SER_STR_DESC || new_stage == ENUM_STAGE_CHECK_FULL_SER_STR_DESC) && enum_ctrl->iSerialNumber == 0)) { new_stage++; } return new_stage; } static void enum_set_next_stage(enum_ctrl_t *enum_ctrl, bool last_stage_pass) { // Set next stage if (last_stage_pass) { if (enum_ctrl->stage != ENUM_STAGE_NONE && enum_ctrl->stage != ENUM_STAGE_CLEANUP && enum_ctrl->stage != ENUM_STAGE_CLEANUP_FAILED) { enum_ctrl->stage = get_next_stage(enum_ctrl->stage, enum_ctrl); } else { enum_ctrl->stage = ENUM_STAGE_NONE; } } else { switch (enum_ctrl->stage) { case ENUM_STAGE_START: // Stage failed but clean up not required enum_ctrl->stage = ENUM_STAGE_NONE; break; case ENUM_STAGE_GET_SHORT_LANGID_TABLE: case ENUM_STAGE_CHECK_SHORT_LANGID_TABLE: case ENUM_STAGE_GET_FULL_LANGID_TABLE: case ENUM_STAGE_CHECK_FULL_LANGID_TABLE: case ENUM_STAGE_GET_SHORT_MANU_STR_DESC: case ENUM_STAGE_CHECK_SHORT_MANU_STR_DESC: case ENUM_STAGE_GET_FULL_MANU_STR_DESC: case ENUM_STAGE_CHECK_FULL_MANU_STR_DESC: case ENUM_STAGE_GET_SHORT_PROD_STR_DESC: case ENUM_STAGE_CHECK_SHORT_PROD_STR_DESC: case ENUM_STAGE_GET_FULL_PROD_STR_DESC: case ENUM_STAGE_CHECK_FULL_PROD_STR_DESC: case ENUM_STAGE_GET_SHORT_SER_STR_DESC: case ENUM_STAGE_CHECK_SHORT_SER_STR_DESC: case ENUM_STAGE_GET_FULL_SER_STR_DESC: case ENUM_STAGE_CHECK_FULL_SER_STR_DESC: // String descriptor stages are allow to fail. We just don't fetch them and treat enumeration as successful enum_ctrl->stage = ENUM_STAGE_CLEANUP; break; default: // Enumeration failed. Go to failure clean up enum_ctrl->stage = ENUM_STAGE_CLEANUP_FAILED; break; } } // These stages are not waiting for a callback, so we need to re-trigger the enum event bool re_trigger; switch (enum_ctrl->stage) { case ENUM_STAGE_GET_SHORT_DEV_DESC: case ENUM_STAGE_SECOND_RESET: case ENUM_STAGE_SET_ADDR: case ENUM_STAGE_SET_ADDR_RECOVERY: case ENUM_STAGE_GET_FULL_DEV_DESC: case ENUM_STAGE_GET_SHORT_CONFIG_DESC: case ENUM_STAGE_GET_FULL_CONFIG_DESC: case ENUM_STAGE_SET_CONFIG: case ENUM_STAGE_GET_SHORT_LANGID_TABLE: case ENUM_STAGE_GET_FULL_LANGID_TABLE: case ENUM_STAGE_GET_SHORT_MANU_STR_DESC: case ENUM_STAGE_GET_FULL_MANU_STR_DESC: case ENUM_STAGE_GET_SHORT_PROD_STR_DESC: case ENUM_STAGE_GET_FULL_PROD_STR_DESC: case ENUM_STAGE_GET_SHORT_SER_STR_DESC: case ENUM_STAGE_GET_FULL_SER_STR_DESC: case ENUM_STAGE_CLEANUP: case ENUM_STAGE_CLEANUP_FAILED: re_trigger = true; break; default: re_trigger = false; break; } if (re_trigger) { HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT; HUB_DRIVER_EXIT_CRITICAL(); } } // ------------------------------------------------- Event Handling ---------------------------------------------------- // ---------------------- Callbacks ------------------------ static bool root_port_callback(hcd_port_handle_t port_hdl, hcd_port_event_t port_event, void *user_arg, bool in_isr) { HUB_DRIVER_ENTER_CRITICAL_SAFE(); p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ROOT_EVENT; HUB_DRIVER_EXIT_CRITICAL_SAFE(); assert(in_isr); // Currently, this callback should only ever be called from an ISR context return p_hub_driver_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_HUB, in_isr, p_hub_driver_obj->constant.proc_req_cb_arg);; } static bool enum_dflt_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr) { // Note: This callback may have triggered when a failed enumeration is already cleaned up (e.g., due to a failed port reset) HUB_DRIVER_ENTER_CRITICAL_SAFE(); p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT; HUB_DRIVER_EXIT_CRITICAL_SAFE(); return p_hub_driver_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_HUB, in_isr, p_hub_driver_obj->constant.proc_req_cb_arg); } static void usbh_hub_req_callback(hcd_port_handle_t port_hdl, usbh_hub_req_t hub_req, void *arg) { // We currently only support the root port, so the port_hdl should match the root port assert(port_hdl == p_hub_driver_obj->constant.root_port_hdl); HUB_DRIVER_ENTER_CRITICAL(); switch (hub_req) { case USBH_HUB_REQ_PORT_DISABLE: p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_DISABLE; break; case USBH_HUB_REQ_PORT_RECOVER: p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_RECOVER; break; default: // Should never occur abort(); break; } HUB_DRIVER_EXIT_CRITICAL(); p_hub_driver_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_HUB, false, p_hub_driver_obj->constant.proc_req_cb_arg); } // ---------------------- Handlers ------------------------- static void root_port_handle_events(hcd_port_handle_t root_port_hdl) { hcd_port_event_t port_event = hcd_port_handle_event(root_port_hdl); switch (port_event) { case HCD_PORT_EVENT_NONE: // Nothing to do break; case HCD_PORT_EVENT_CONNECTION: { if (hcd_port_command(root_port_hdl, HCD_PORT_CMD_RESET) == ESP_OK) { ESP_LOGD(HUB_DRIVER_TAG, "Root port reset"); // Start enumeration HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT; p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_ENUM; HUB_DRIVER_EXIT_CRITICAL(); p_hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_START; } else { ESP_LOGE(HUB_DRIVER_TAG, "Root port reset failed"); } break; } case HCD_PORT_EVENT_DISCONNECTION: case HCD_PORT_EVENT_ERROR: case HCD_PORT_EVENT_OVERCURRENT: { bool pass_event_to_usbh = false; HUB_DRIVER_ENTER_CRITICAL(); switch (p_hub_driver_obj->dynamic.driver_state) { case HUB_DRIVER_STATE_ROOT_POWERED: // This occurred before enumeration case HUB_DRIVER_STATE_ROOT_ENUM_FAILED: // This occurred after a failed enumeration. // Therefore, there's no device and we can go straight to port recovery p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_RECOVER; break; case HUB_DRIVER_STATE_ROOT_ENUM: // This occurred during enumeration. Therefore, we need to recover the failed enumeration p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT; p_hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_CLEANUP_FAILED; break; case HUB_DRIVER_STATE_ROOT_ACTIVE: // There was an enumerated device. We need to indicate to USBH that the device is gone pass_event_to_usbh = true; break; default: abort(); // Should never occur break; } p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_RECOVERY; HUB_DRIVER_EXIT_CRITICAL(); if (pass_event_to_usbh) { assert(p_hub_driver_obj->single_thread.root_dev_hdl); ESP_ERROR_CHECK(usbh_hub_pass_event(p_hub_driver_obj->single_thread.root_dev_hdl, USBH_HUB_EVENT_PORT_ERROR)); } break; } default: abort(); // Should never occur break; } } static void enum_handle_events(void) { bool stage_pass; enum_ctrl_t *enum_ctrl = &p_hub_driver_obj->single_thread.enum_ctrl; switch (enum_ctrl->stage) { case ENUM_STAGE_START: stage_pass = enum_stage_start(enum_ctrl); break; case ENUM_STAGE_SECOND_RESET: stage_pass = enum_stage_second_reset(enum_ctrl); break; // Transfer submission stages case ENUM_STAGE_GET_SHORT_DEV_DESC: case ENUM_STAGE_SET_ADDR: case ENUM_STAGE_GET_FULL_DEV_DESC: case ENUM_STAGE_GET_SHORT_CONFIG_DESC: case ENUM_STAGE_GET_FULL_CONFIG_DESC: case ENUM_STAGE_SET_CONFIG: case ENUM_STAGE_GET_SHORT_LANGID_TABLE: case ENUM_STAGE_GET_FULL_LANGID_TABLE: case ENUM_STAGE_GET_SHORT_MANU_STR_DESC: case ENUM_STAGE_GET_FULL_MANU_STR_DESC: case ENUM_STAGE_GET_SHORT_PROD_STR_DESC: case ENUM_STAGE_GET_FULL_PROD_STR_DESC: case ENUM_STAGE_GET_SHORT_SER_STR_DESC: case ENUM_STAGE_GET_FULL_SER_STR_DESC: stage_pass = enum_stage_transfer(enum_ctrl); break; // Recovery interval case ENUM_STAGE_SET_ADDR_RECOVERY: stage_pass = enum_stage_wait(enum_ctrl); break; // Transfer check stages case ENUM_STAGE_CHECK_SHORT_DEV_DESC: case ENUM_STAGE_CHECK_ADDR: case ENUM_STAGE_CHECK_FULL_DEV_DESC: case ENUM_STAGE_CHECK_SHORT_CONFIG_DESC: case ENUM_STAGE_CHECK_FULL_CONFIG_DESC: case ENUM_STAGE_CHECK_CONFIG: case ENUM_STAGE_CHECK_SHORT_LANGID_TABLE: case ENUM_STAGE_CHECK_FULL_LANGID_TABLE: case ENUM_STAGE_CHECK_SHORT_MANU_STR_DESC: case ENUM_STAGE_CHECK_FULL_MANU_STR_DESC: case ENUM_STAGE_CHECK_SHORT_PROD_STR_DESC: case ENUM_STAGE_CHECK_FULL_PROD_STR_DESC: case ENUM_STAGE_CHECK_SHORT_SER_STR_DESC: case ENUM_STAGE_CHECK_FULL_SER_STR_DESC: stage_pass = enum_stage_transfer_check(enum_ctrl); break; case ENUM_STAGE_CLEANUP: enum_stage_cleanup(enum_ctrl); stage_pass = true; break; case ENUM_STAGE_CLEANUP_FAILED: enum_stage_cleanup_failed(enum_ctrl); stage_pass = true; break; default: // Note: Don't abort here. The enum_dflt_pipe_callback() can trigger a HUB_DRIVER_FLAG_ACTION_ENUM_EVENT after a cleanup. stage_pass = true; break; } if (stage_pass) { ESP_LOGD(HUB_DRIVER_TAG, "Stage done: %s", enum_stage_strings[enum_ctrl->stage]); } else { ESP_LOGE(HUB_DRIVER_TAG, "Stage failed: %s", enum_stage_strings[enum_ctrl->stage]); } enum_set_next_stage(enum_ctrl, stage_pass); } // ---------------------------------------------- Hub Driver Functions ------------------------------------------------- esp_err_t hub_install(hub_config_t *hub_config) { HUB_DRIVER_ENTER_CRITICAL(); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj == NULL, ESP_ERR_INVALID_STATE); HUB_DRIVER_EXIT_CRITICAL(); // Allocate Hub driver object hub_driver_t *hub_driver_obj = heap_caps_calloc(1, sizeof(hub_driver_t), MALLOC_CAP_DEFAULT); urb_t *enum_urb = urb_alloc(sizeof(usb_setup_packet_t) + ENUM_CTRL_TRANSFER_MAX_DATA_LEN, 0); if (hub_driver_obj == NULL || enum_urb == NULL) { return ESP_ERR_NO_MEM; } esp_err_t ret; // Install HCD port hcd_port_config_t port_config = { .fifo_bias = HUB_ROOT_HCD_PORT_FIFO_BIAS, .callback = root_port_callback, .callback_arg = NULL, .context = NULL, }; hcd_port_handle_t port_hdl; ret = hcd_port_init(HUB_ROOT_PORT_NUM, &port_config, &port_hdl); if (ret != ESP_OK) { goto err; } // Initialize Hub driver object hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_INSTALLED; hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_NONE; hub_driver_obj->single_thread.enum_ctrl.urb = enum_urb; hub_driver_obj->constant.root_port_hdl = port_hdl; hub_driver_obj->constant.proc_req_cb = hub_config->proc_req_cb; hub_driver_obj->constant.proc_req_cb_arg = hub_config->proc_req_cb_arg; HUB_DRIVER_ENTER_CRITICAL(); if (p_hub_driver_obj != NULL) { HUB_DRIVER_EXIT_CRITICAL(); ret = ESP_ERR_INVALID_STATE; goto assign_err; } p_hub_driver_obj = hub_driver_obj; HUB_DRIVER_EXIT_CRITICAL(); // Indicate to USBH that the hub is installed ESP_ERROR_CHECK(usbh_hub_is_installed(usbh_hub_req_callback, NULL)); ret = ESP_OK; return ret; assign_err: ESP_ERROR_CHECK(hcd_port_deinit(port_hdl)); err: urb_free(enum_urb); heap_caps_free(hub_driver_obj); return ret; } esp_err_t hub_uninstall(void) { HUB_DRIVER_ENTER_CRITICAL(); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE); hub_driver_t *hub_driver_obj = p_hub_driver_obj; p_hub_driver_obj = NULL; HUB_DRIVER_EXIT_CRITICAL(); ESP_ERROR_CHECK(hcd_port_deinit(hub_driver_obj->constant.root_port_hdl)); // Free Hub driver resources urb_free(hub_driver_obj->single_thread.enum_ctrl.urb); heap_caps_free(hub_driver_obj); return ESP_OK; } esp_err_t hub_root_start(void) { HUB_DRIVER_ENTER_CRITICAL(); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE); HUB_DRIVER_EXIT_CRITICAL(); // Power ON the root port esp_err_t ret; ret = hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_ON); if (ret == ESP_OK) { HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_POWERED; HUB_DRIVER_EXIT_CRITICAL(); } return ret; } esp_err_t hub_root_stop(void) { HUB_DRIVER_ENTER_CRITICAL(); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE); HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state != HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE); HUB_DRIVER_EXIT_CRITICAL(); esp_err_t ret; ret = hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_OFF); if (ret == ESP_OK) { HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_INSTALLED; HUB_DRIVER_EXIT_CRITICAL(); } return ret; } esp_err_t hub_process(void) { HUB_DRIVER_ENTER_CRITICAL(); uint32_t action_flags = p_hub_driver_obj->dynamic.flags.actions; p_hub_driver_obj->dynamic.flags.actions = 0; HUB_DRIVER_EXIT_CRITICAL(); while (action_flags) { /* Mutually exclude Root event and Port disable: If a device was waiting for its port to be disabled, and a port error occurs in that time, the root event handler will send a USBH_HUB_EVENT_PORT_ERROR to the USBH already, thus freeing the device and canceling the waiting of port disable. */ if (action_flags & HUB_DRIVER_FLAG_ACTION_ROOT_EVENT) { root_port_handle_events(p_hub_driver_obj->constant.root_port_hdl); } else if (action_flags & HUB_DRIVER_FLAG_ACTION_PORT_DISABLE) { ESP_LOGD(HUB_DRIVER_TAG, "Disabling root port"); hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_DISABLE); ESP_ERROR_CHECK(usbh_hub_pass_event(p_hub_driver_obj->single_thread.root_dev_hdl, USBH_HUB_EVENT_PORT_DISABLED)); // The root port has been disabled, so the root_dev_hdl is no longer valid p_hub_driver_obj->single_thread.root_dev_hdl = NULL; } if (action_flags & HUB_DRIVER_FLAG_ACTION_PORT_RECOVER) { ESP_LOGD(HUB_DRIVER_TAG, "Recovering root port"); ESP_ERROR_CHECK(hcd_port_recover(p_hub_driver_obj->constant.root_port_hdl)); ESP_ERROR_CHECK(hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_ON)); HUB_DRIVER_ENTER_CRITICAL(); p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_POWERED; HUB_DRIVER_EXIT_CRITICAL(); // USBH requesting a port recovery means the device has already been freed. Clear root_dev_hdl p_hub_driver_obj->single_thread.root_dev_hdl = NULL; } if (action_flags & HUB_DRIVER_FLAG_ACTION_ENUM_EVENT) { enum_handle_events(); } HUB_DRIVER_ENTER_CRITICAL(); action_flags = p_hub_driver_obj->dynamic.flags.actions; p_hub_driver_obj->dynamic.flags.actions = 0; HUB_DRIVER_EXIT_CRITICAL(); } return ESP_OK; }