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refactor(usb/usbh): Update USBH device creation and enumeration handling

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This commit updates how the USBH handles device creation and enumeration so that
upper layers (such as the Hub driver) can use the USBH API for enumeration instead
of calling the HCD.

USBH Updates:

USBH now creates unenumerated devices set to address 0 with no device/config
descriptor. A newly created device can be opened and communicated with immediately
(using control transfers). This allows the Hub driver to call the USBH instead of
the HCD. Summary of USBH changes:

- Added new APIs to add/remove a device. Devices are now created as unenumerated
and can be immediately opened and communicated with.
- Added new APIs to enumerate a device (see 'usbh_dev_set_...()' functions). Device
must be locked (see 'usbh_dev_enum_lock()') before enumeration functions can be called.
- Added UID for each device. This allows the particular USBH without needing to
use the device's handle (which implies opening the device).

Hub Driver Updates:

Hub driver now calls the USBH for enumeration. Summary of USBH changes:

- Replace all 'hcd_pipe_...()' calls with 'usbh_dev_...()' calls
- Refactored port event handling to fit with new USBH API
- Updated to use UID to uniquely identify devices without opening them

USB Host Updates:

- Reroute USBH control transfers to clients and hub driver
This commit is contained in:
Darian Leung
2024-04-10 05:06:46 +08:00
committed by BOT
parent df6c6f93fa
commit a602befe1b
7 changed files with 769 additions and 523 deletions
Download Patch File Download Diff File Expand all files Collapse all files

230
components/usb/hub.c
View File

@@ -40,6 +40,7 @@ implement the bare minimum to control the root HCD port.
#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_DEV_UID 1 // Unique ID for device connected to root port
#define ENUM_CONFIG_INDEX_DEFAULT 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
@@ -63,9 +64,8 @@ implement the bare minimum to control the root HCD port.
typedef enum {
ROOT_PORT_STATE_NOT_POWERED, /**< Root port initialized and/or not powered */
ROOT_PORT_STATE_POWERED, /**< Root port is powered, device is not connected */
ROOT_PORT_STATE_ENUM, /**< A device has been connected to the root port and is undergoing enumeration */
ROOT_PORT_STATE_ENUM_FAILED, /**< Enumeration of a connected device has failed. Waiting for that device to be disconnected */
ROOT_PORT_ACTIVE, /**< The connected device was enumerated and port is active */
ROOT_PORT_STATE_DISABLED, /**< A device is connected but is disabled (i.e., not reset, no SOFs are sent) */
ROOT_PORT_STATE_ENABLED, /**< A device is connected, port has been reset, SOFs are sent */
ROOT_PORT_STATE_RECOVERY, /**< Root port encountered an error and needs to be recovered */
} root_port_state_t;
@@ -159,7 +159,6 @@ typedef struct {
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 */
@@ -192,7 +191,7 @@ typedef struct {
} 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
unsigned int root_dev_uid; // UID of the device connected to root port. 0 if no device connected
enum_ctrl_t enum_ctrl;
} single_thread;
// Constant members do no change after installation thus do not require a critical section
@@ -245,40 +244,26 @@ const char *HUB_DRIVER_TAG = "HUB";
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
* @brief Control transfer callback used for 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
* @param transfer Transfer object
*/
static bool enum_dflt_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
static void enum_transfer_callback(usb_transfer_t *transfer);
// ------------------------------------------------- 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;
// Open the newly added device (at address 0)
ESP_ERROR_CHECK(usbh_devs_open(0, &p_hub_driver_obj->single_thread.enum_ctrl.dev_hdl));
// Get the speed of the device to set the initial MPS of EP0
usb_device_info_t dev_info;
ESP_ERROR_CHECK(usbh_dev_get_info(p_hub_driver_obj->single_thread.enum_ctrl.dev_hdl, &dev_info));
enum_ctrl->bMaxPacketSize0 = (dev_info.speed == USB_SPEED_LOW) ? ENUM_WORST_CASE_MPS_LS : ENUM_WORST_CASE_MPS_FS;
// Lock the device for enumeration. This allows us call usbh_dev_set_...() functions during enumeration
ESP_ERROR_CHECK(usbh_dev_enum_lock(p_hub_driver_obj->single_thread.enum_ctrl.dev_hdl));
// Flag to gracefully exit the enumeration process if requested by the user in the enumeration filter cb
#ifdef ENABLE_ENUM_FILTER_CALLBACK
@@ -445,7 +430,7 @@ static bool enum_stage_transfer(enum_ctrl_t *enum_ctrl)
abort();
break;
}
if (hcd_urb_enqueue(enum_ctrl->pipe, enum_ctrl->urb) != ESP_OK) {
if (usbh_dev_submit_ctrl_urb(enum_ctrl->dev_hdl, enum_ctrl->urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to submit: %s", enum_stage_strings[enum_ctrl->stage]);
return false;
}
@@ -470,18 +455,10 @@ static bool enum_stage_wait(enum_ctrl_t *enum_ctrl)
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;
usb_transfer_t *transfer = &enum_ctrl->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
@@ -508,8 +485,8 @@ static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl)
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) {
// Update and save the MPS of the EP0
if (usbh_dev_set_ep0_mps(enum_ctrl->dev_hdl, device_desc->bMaxPacketSize0) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to update MPS");
ret = false;
break;
@@ -520,16 +497,15 @@ static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl)
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));
// Update the device's address
ESP_ERROR_CHECK(usbh_dev_set_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
// Set the device's descriptor
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));
ESP_ERROR_CHECK(usbh_dev_set_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;
@@ -558,10 +534,10 @@ static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl)
break;
}
case ENUM_STAGE_CHECK_FULL_CONFIG_DESC: {
// Fill configuration descriptor into the device object
// Set the device's configuration descriptor
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));
ESP_ERROR_CHECK(usbh_dev_set_config_desc(enum_ctrl->dev_hdl, config_desc));
ret = true;
break;
}
@@ -638,7 +614,7 @@ static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl)
} 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));
ESP_ERROR_CHECK(usbh_dev_set_str_desc(enum_ctrl->dev_hdl, str_desc, select));
ret = true;
break;
}
@@ -653,43 +629,27 @@ static bool enum_stage_transfer_check(enum_ctrl_t *enum_ctrl)
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.root_port_state = ROOT_PORT_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;
// Unlock the device as we are done with the enumeration
ESP_ERROR_CHECK(usbh_dev_enum_unlock(enum_ctrl->dev_hdl));
// Propagate a new device event
ESP_ERROR_CHECK(usbh_devs_new_dev_event(enum_ctrl->dev_hdl));
// We are done with using the device. Close it.
ESP_ERROR_CHECK(usbh_devs_close(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
// Close the device and unlock it as we done with enumeration
ESP_ERROR_CHECK(usbh_dev_enum_unlock(enum_ctrl->dev_hdl));
ESP_ERROR_CHECK(usbh_devs_close(enum_ctrl->dev_hdl));
// We allow this to fail in case the device object was already freed
usbh_devs_remove(ENUM_DEV_UID);
}
// 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.root_port_state == ROOT_PORT_STATE_RECOVERY) {
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_RECOVER;
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_REQ;
} else {
// Otherwise, we move to the enum failed state and wait for the device to disconnect
p_hub_driver_obj->dynamic.root_port_state = ROOT_PORT_STATE_ENUM_FAILED;
}
HUB_DRIVER_EXIT_CRITICAL();
}
static enum_stage_t get_next_stage(enum_stage_t old_stage, enum_ctrl_t *enum_ctrl)
@@ -803,13 +763,13 @@ static bool root_port_callback(hcd_port_handle_t port_hdl, hcd_port_event_t port
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)
static void enum_transfer_callback(usb_transfer_t *transfer)
{
// Note: This callback may have triggered when a failed enumeration is already cleaned up (e.g., due to a failed port reset)
// We simply trigger a processing request to handle the completed enumeration control transfer
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);
p_hub_driver_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_HUB, false, p_hub_driver_obj->constant.proc_req_cb_arg);
}
// ---------------------- Handlers -------------------------
@@ -822,17 +782,32 @@ static void root_port_handle_events(hcd_port_handle_t root_port_hdl)
// 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.root_port_state = ROOT_PORT_STATE_ENUM;
HUB_DRIVER_EXIT_CRITICAL();
p_hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_START;
} else {
if (hcd_port_command(root_port_hdl, HCD_PORT_CMD_RESET) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Root port reset failed");
goto reset_err;
}
ESP_LOGD(HUB_DRIVER_TAG, "Root port reset");
usb_speed_t speed;
if (hcd_port_get_speed(p_hub_driver_obj->constant.root_port_hdl, &speed) != ESP_OK) {
goto new_dev_err;
}
// Allocate a new device. We use a fixed ENUM_DEV_UID for now since we only support a single device
if (usbh_devs_add(ENUM_DEV_UID, speed, p_hub_driver_obj->constant.root_port_hdl) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to add device");
goto new_dev_err;
}
p_hub_driver_obj->single_thread.root_dev_uid = ENUM_DEV_UID;
// Start enumeration
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
p_hub_driver_obj->dynamic.root_port_state = ROOT_PORT_STATE_ENABLED;
HUB_DRIVER_EXIT_CRITICAL();
p_hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_START;
break;
new_dev_err:
// We allow this to fail in case a disconnect/port error happens while disabling.
hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_DISABLE);
reset_err:
break;
}
case HCD_PORT_EVENT_DISCONNECTION:
@@ -842,18 +817,13 @@ static void root_port_handle_events(hcd_port_handle_t root_port_hdl)
HUB_DRIVER_ENTER_CRITICAL();
switch (p_hub_driver_obj->dynamic.root_port_state) {
case ROOT_PORT_STATE_POWERED: // This occurred before enumeration
case ROOT_PORT_STATE_ENUM_FAILED: // This occurred after a failed enumeration.
// Therefore, there's no device and we can go straight to port recovery
case ROOT_PORT_STATE_DISABLED: // This occurred after the device has already been disabled
// Therefore, there's no device object to clean up, and we can go straight to port recovery
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_RECOVER;
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_REQ;
break;
case ROOT_PORT_STATE_ENUM:
// This occurred during enumeration. Therefore, we need to cleanup 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 ROOT_PORT_ACTIVE:
// There was an enumerated device. We need to indicate to USBH that the device is gone
case ROOT_PORT_STATE_ENABLED:
// There is an enabled (active) device. We need to indicate to USBH that the device is gone
pass_event_to_usbh = true;
break;
default:
@@ -863,7 +833,10 @@ static void root_port_handle_events(hcd_port_handle_t root_port_hdl)
p_hub_driver_obj->dynamic.root_port_state = ROOT_PORT_STATE_RECOVERY;
HUB_DRIVER_EXIT_CRITICAL();
if (pass_event_to_usbh) {
ESP_ERROR_CHECK(usbh_hub_dev_gone(p_hub_driver_obj->single_thread.root_dev_hdl));
// The port must have a device object
assert(p_hub_driver_obj->single_thread.root_dev_uid != 0);
// We allow this to fail in case the device object was already freed
usbh_devs_remove(p_hub_driver_obj->single_thread.root_dev_uid);
}
break;
}
@@ -955,7 +928,6 @@ static void enum_handle_events(void)
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;
}
@@ -977,18 +949,22 @@ static void enum_handle_events(void)
// ---------------------------------------------- Hub Driver Functions -------------------------------------------------
esp_err_t hub_install(hub_config_t *hub_config)
esp_err_t hub_install(hub_config_t *hub_config, void **client_ret)
{
HUB_DRIVER_ENTER_CRITICAL();
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj == NULL, ESP_ERR_INVALID_STATE);
HUB_DRIVER_EXIT_CRITICAL();
esp_err_t ret;
// 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;
enum_urb->usb_host_client = (void *)hub_driver_obj;
enum_urb->transfer.callback = enum_transfer_callback;
// Install HCD port
hcd_port_config_t port_config = {
.fifo_bias = HUB_ROOT_HCD_PORT_FIFO_BIAS,
@@ -1001,6 +977,7 @@ esp_err_t hub_install(hub_config_t *hub_config)
if (ret != ESP_OK) {
goto err;
}
// Initialize Hub driver object
hub_driver_obj->single_thread.enum_ctrl.stage = ENUM_STAGE_NONE;
hub_driver_obj->single_thread.enum_ctrl.urb = enum_urb;
@@ -1020,6 +997,9 @@ esp_err_t hub_install(hub_config_t *hub_config)
}
p_hub_driver_obj = hub_driver_obj;
HUB_DRIVER_EXIT_CRITICAL();
// Write-back client_ret pointer
*client_ret = (void *)hub_driver_obj;
ret = ESP_OK;
return ret;
@@ -1081,31 +1061,31 @@ esp_err_t hub_root_stop(void)
return ret;
}
esp_err_t hub_dev_is_free(uint8_t dev_addr)
esp_err_t hub_port_recycle(unsigned int dev_uid)
{
assert(dev_addr == ENUM_DEV_ADDR);
assert(p_hub_driver_obj->single_thread.root_dev_hdl);
// Device is free, we can now request its port be recycled
hcd_port_state_t port_state = hcd_port_get_state(p_hub_driver_obj->constant.root_port_hdl);
p_hub_driver_obj->single_thread.root_dev_hdl = NULL;
if (dev_uid == p_hub_driver_obj->single_thread.root_dev_uid) {
// Device is free, we can now request its port be recycled
hcd_port_state_t port_state = hcd_port_get_state(p_hub_driver_obj->constant.root_port_hdl);
p_hub_driver_obj->single_thread.root_dev_uid = 0;
HUB_DRIVER_ENTER_CRITICAL();
// How the port is recycled will depend on the port's state
switch (port_state) {
case HCD_PORT_STATE_ENABLED:
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_DISABLE;
break;
case HCD_PORT_STATE_RECOVERY:
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_RECOVER;
break;
default:
abort(); // Should never occur
break;
}
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_REQ;
HUB_DRIVER_EXIT_CRITICAL();
HUB_DRIVER_ENTER_CRITICAL();
// How the port is recycled will depend on the port's state
switch (port_state) {
case HCD_PORT_STATE_ENABLED:
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_DISABLE;
break;
case HCD_PORT_STATE_RECOVERY:
p_hub_driver_obj->dynamic.port_reqs |= PORT_REQ_RECOVER;
break;
default:
abort(); // Should never occur
break;
p_hub_driver_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_HUB, false, p_hub_driver_obj->constant.proc_req_cb_arg);
}
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_REQ;
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);
return ESP_OK;
}