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esp-idf/components/usb/hub.c

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49 KiB
C
Czysty Wina Historia

/*
* 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);
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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