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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** HUB Class */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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#include "ux_host_class_hub.h" |
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#include "ux_host_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_host_class_hub_activate PORTABLE C */ |
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/* 6.1.12 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function performs the enumeration of the HUB. The HUB */ |
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/* descriptor is read, the interrupt endpoint activated, power is set */ |
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/* to the downstream ports and the HUB instance will be awaken when */ |
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/* there is a status change on the HUB or one of the ports. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* command Pointer to command */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_class_hub_configure Configure HUB */ |
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/* _ux_host_class_hub_descriptor_get Get descriptor */ |
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/* _ux_host_class_hub_interrupt_endpoint_start */ |
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/* Start interrupt endpoint */ |
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/* _ux_host_class_hub_ports_power Power ports */ |
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/* _ux_host_stack_class_instance_create Create class instance */ |
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/* _ux_host_stack_class_instance_destroy Destroy class instance */ |
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/* _ux_utility_memory_allocate Allocate memory block */ |
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/* _ux_utility_memory_free Free memory block */ |
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/* _ux_host_semaphore_create Create semaphore */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* HUB Class */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_class_hub_activate(UX_HOST_CLASS_COMMAND *command) |
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{ |
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UX_DEVICE *device; |
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UX_HOST_CLASS_HUB *hub; |
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UINT status; |
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#if UX_MAX_DEVICES > 1 |
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/* We need to make sure that the enumeration thread knows about at least |
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one active HUB instance and the function to call when the thread |
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is awaken. */ |
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_ux_system_host -> ux_system_host_enum_hub_function = _ux_host_class_hub_change_detect; |
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#endif |
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/* The HUB is always activated by the device descriptor and not the |
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instance descriptor. */ |
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device = (UX_DEVICE *) command -> ux_host_class_command_container; |
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/* Instantiate this HUB class. */ |
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hub = (UX_HOST_CLASS_HUB *) _ux_utility_memory_allocate(UX_NO_ALIGN, UX_REGULAR_MEMORY, sizeof(UX_HOST_CLASS_HUB)); |
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✓✓ |
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if (hub == UX_NULL) |
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return(UX_MEMORY_INSUFFICIENT); |
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/* Store the class container into this instance. */ |
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hub -> ux_host_class_hub_class = command -> ux_host_class_command_class_ptr; |
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/* Store the device container instance in the HUB instance, this is for |
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the class instance when it needs to talk to the USBX stack. */ |
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hub -> ux_host_class_hub_device = device; |
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#if defined(UX_HOST_STANDALONE) |
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/* Store the instance in the device container, this is for the USBX stack |
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when it needs to invoke the class. */ |
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device -> ux_device_class_instance = (VOID *) hub; |
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/* Store the hub interface. */ |
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hub -> ux_host_class_hub_interface = device -> |
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ux_device_first_configuration -> ux_configuration_first_interface; |
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/* Store the class task function. */ |
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hub -> ux_host_class_hub_class -> ux_host_class_task_function = _ux_host_class_hub_tasks_run; |
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/* During activation and tasks, control transfer is used for requests. */ |
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hub -> ux_host_class_hub_transfer = &device -> ux_device_control_endpoint.ux_endpoint_transfer_request; |
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/* The HUB is configured and activated in ACTIVATE_WAIT. */ |
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hub -> ux_host_class_hub_run_status = UX_SUCCESS; |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_GET_STATUS; |
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status = UX_SUCCESS; |
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#else |
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/* Configure the HUB. */ |
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status = _ux_host_class_hub_configure(hub); |
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✓✓ |
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if (status == UX_SUCCESS) |
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{ |
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/* Get the HUB descriptor. */ |
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status = _ux_host_class_hub_descriptor_get(hub); |
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✓✓ |
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if (status == UX_SUCCESS) |
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{ |
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/* Power up the HUB downstream ports. This function always returns |
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success since we may be dealing with multiple ports. */ |
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_ux_host_class_hub_ports_power(hub); |
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/* Search the HUB interrupt endpoint and start it. */ |
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status = _ux_host_class_hub_interrupt_endpoint_start(hub); |
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✓✓ |
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if (status == UX_SUCCESS) |
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{ |
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/* Create this class instance. */ |
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_ux_host_stack_class_instance_create(hub -> ux_host_class_hub_class, (VOID *) hub); |
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/* Store the instance in the device container, this is for the USBX stack |
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when it needs to invoke the class. */ |
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device -> ux_device_class_instance = (VOID *) hub; |
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/* Mark the HUB as live now. */ |
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hub -> ux_host_class_hub_state = UX_HOST_CLASS_INSTANCE_LIVE; |
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/* If all is fine and the device is mounted, we may need to inform the application |
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if a function has been programmed in the system structure. */ |
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✓✓ |
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if (_ux_system_host -> ux_system_host_change_function != UX_NULL) |
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{ |
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/* Call system change function. */ |
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_ux_system_host -> ux_system_host_change_function(UX_DEVICE_INSERTION, hub -> ux_host_class_hub_class, (VOID *) hub); |
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} |
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/* Return success. */ |
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return(UX_SUCCESS); |
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} |
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} |
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} |
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/* We get here when an error occurred. */ |
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/* Free the hub instance. */ |
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_ux_utility_memory_free(hub); |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_HUB_ACTIVATE, hub, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) |
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/* If trace is enabled, register this object. */ |
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UX_TRACE_OBJECT_REGISTER(UX_TRACE_HOST_OBJECT_TYPE_INTERFACE, hub, 0, 0, 0) |
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#endif |
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/* Return completion status. */ |
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return(status); |
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} |