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esp-idf/components/usb/hub.c
Tomas Rezucha 4cf3acb594 fix(usb/host): Do not abort on string descriptor overflow 
Some devices return full LANGID table, even if short LANGID table was requested.
No memory overflow occurs, because we have allocated enough memory for transfers to the
default pipe. So we can ignore the error and continue with string desc fetching.
2023-12-05 16:44:53 +01:00

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/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#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, 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;
}
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